WO2019043899A1 - 中空の部材 - Google Patents
中空の部材 Download PDFInfo
- Publication number
- WO2019043899A1 WO2019043899A1 PCT/JP2017/031523 JP2017031523W WO2019043899A1 WO 2019043899 A1 WO2019043899 A1 WO 2019043899A1 JP 2017031523 W JP2017031523 W JP 2017031523W WO 2019043899 A1 WO2019043899 A1 WO 2019043899A1
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- WO
- WIPO (PCT)
- Prior art keywords
- frame
- hollow member
- bending
- filling
- filling member
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
- B62D21/152—Front or rear frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/02—Side panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/04—Door pillars ; windshield pillars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/001—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material
- B62D29/002—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material a foamable synthetic material or metal being added in situ
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16S—CONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
- F16S3/00—Elongated members, e.g. profiled members; Assemblies thereof; Gratings or grilles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection
Definitions
- the present invention relates to hollow members.
- One of the methods of forming a structure such as a car, a railway vehicle, an aircraft or a building is a method of forming a structure by a frame corresponding to a skeleton and other structural members (skin and the like).
- a frame is typically required to have high strength and light weight from the viewpoint of improving the strength of the structure and suppressing costs.
- strengthening and thinning of steel plates forming the frame have been promoted.
- Patent Document 1 discloses a technique in which the filling member is disposed without a gap inside the frame.
- the frame deforms when a load is applied to the frame as in a car crash. At this time, deformation occurs in the cross section of the frame. This deformation is called cross-sectional deformation.
- the load applied to the frame exceeds a predetermined value, the frame is buckled and the load-bearing performance of the frame is significantly reduced. The fact that buckling occurs means that it bends. In this case, the energy absorption amount assumed for the frame may not be secured.
- the inventors considered that it is useful to further increase the mass efficiency with respect to the improvement of the energy absorption amount by the filling member and to suppress the out-of-plane deformation that causes the reduction of the energy absorption amount of the frame.
- the effective arrangement of the filling member for suppressing the out-of-plane deformation and improving the energy absorption amount of the frame has not been studied at all.
- An object of the present invention is to provide a new and improved hollow member which realizes energy absorption at load input with high mass efficiency.
- the present invention consists of a hollow metallic member which has a bending induction part in a part of longitudinal direction, and resin which has Young's modulus 20MPa or more, and it adheres to the metallic member and bends. And a resin member disposed in the inducing portion.
- the metal member has a bottom wall portion, a pair of side wall portions rising from both ends of the bottom wall portion, and a top wall portion facing the bottom wall portion, and the bottom wall portion and the pair of side wall portions And the top wall may form a closed cross section.
- the resin material may be disposed in close contact with the inner surface of at least one of the bottom wall portion or the top wall portion.
- the resin material may be disposed in intimate contact with the inner surface of at least one of the pair of side wall portions.
- a second metal plate may be disposed in contact with the first metal plate forming the metal member inside the metal member.
- the resin material may be disposed in close contact with the second metal plate.
- the first metal plate forming the metal member has a hole, the resin material is made of a foamed resin, and the resin material penetrates the hole and both the outer surface and the inner surface of the first metal plate are formed. It may be disposed in close contact with the
- the hole edge of the hole may be located more inward of the metal member than the first metal plate forming the metal member.
- the hole may be a burring hole in which the hole edge of the hole protrudes inward from the outside of the first metal plate forming the metal member.
- the hole may be provided with a depression recessed inward of the metal member relative to the first metal plate forming the metal member, and the hole may be provided inside the depression. .
- the bending induction portion may be a portion where the total plastic moment of the metal member changes in the longitudinal direction.
- the bending induction portion may be a portion having a curvature radius of 260 mm or less of a locus of the center of gravity along the longitudinal direction formed by the center of gravity of a cross section of the metal member.
- the bending induction portion may be a thickness changing portion.
- the bending inducing portion may be a portion provided with a recess.
- the bend inducing portion may be a portion provided with a convex portion.
- the bend inducing portion may be a portion provided with a hole.
- the resin material may be arranged to cover the bending inducing portion and peripheral portions on both sides in the longitudinal direction of the bending inducing portion.
- the resin material includes the bending inducing portion, in a range where the distance from the bending inducing portion to the end in the longitudinal direction of the resin material is equal to or less than a half of the height of the cross section of the metal member. It may be arranged to cover peripheral portions on both sides in the longitudinal direction of the bending inducing portion.
- the resin material has the bending induction portion from a boundary bisecting the cross section in the height direction of the cross section defined in a direction from the center of gravity of the cross section toward the bending induction portion It may be placed on the side.
- the resin material may be disposed at a part of the bending induction part and may not be disposed at another part of the bending induction part.
- the bending induced portion induces bending deformation at the time of inputting the load, while the resin material disposed in the bending inducing portion suppresses the out-of-plane deformation occurring in the bending induced portion at the time of bending deformation occurrence.
- the out-of-plane deformation of the hollow member at the time of input of load is suppressed, it is possible to maintain the load bearing performance exhibited by the cross section of the hollow member at a level assumed at the design stage. Therefore, the energy absorption amount at the time of load input can be improved.
- the place where the out-of-plane deformation is to be suppressed is limited to the bending induction portion or the periphery thereof, the energy absorption amount at the time of load input can be improved with high mass efficiency.
- FIG. 6 is a cross-sectional view taken along the line II-II of the frame shown in FIG.
- FIG. 13 is a cross-sectional view taken along the line VV of the frame shown in FIG. 12; It is sectional drawing in the VI-VI cutting line of the flame
- FIG. 23 is a cross-sectional view taken along the line VIII-VIII of the frame shown in FIG. It is sectional drawing of the flame
- FIG. 40 is a cross-sectional view of the frame shown in FIG. 39 taken along line XIII-XIII.
- FIG. 40 is a cross sectional view taken along a line XIV-XIV of the frame shown in FIG. 39.
- FIG. 1 It is a top view which shows the structure of the sample used for the cross tension test which concerns on Example 1 and Example 2 which concern on the 4th Embodiment of this invention. It is a side sectional view showing the composition of the sample concerning Example 1 concerning the embodiment. It is a side sectional view showing the composition of the sample concerning Example 2 concerning the embodiment. It is a side sectional view showing the composition of the sample concerning the comparative example concerning the embodiment. It is a graph which shows the maximum load of each sample measured by the cross tension test concerning the embodiment. It is a figure for demonstrating the simulation setting of the Example regarding the arrangement
- FIG. 7 is a view showing a list of cross-sectional views before and after deformation of Embodiments 1 to 5 and Reference Example 1 regarding the arrangement range of the filling member. It is a graph which shows the absorbed energy ratio which is a ratio of the amount of energy absorption when the amount of energy absorption of reference example 1 of Examples 1 to 5 and Reference Example 1 is 1 regarding the arrangement range of the filling member.
- FIG. 18 is a view showing a list of cross-sectional views before and after deformation of Embodiments 6 to 10 and Reference Example 2 regarding the arrangement range of the filling member.
- FIG. 6 is a side view of an example frame of the Young's modulus of the filler member.
- FIG. 123 is a cross sectional view taken along the line A1-A1 of the frame shown in FIG. 122.
- FIG. 123 is a cross-sectional view taken along the line A2-A2 of the frame shown in FIG. 122.
- the hollow member according to an embodiment of the present invention can be used as various structural members.
- a hollow member according to an embodiment is used for a vehicle frame as a vehicle structural member will be described.
- the vehicle frame is simply referred to as a frame.
- FIG. 1 is a schematic configuration view of a vehicle for explaining an application target of a frame according to the present embodiment.
- a vehicle body provided in a vehicle 1000 such as a general automobile shown in FIG. 1 can be classified into a front structure (FRONT), a rear structure (REAR), and a cabin structure (CABIN).
- FRONT front structure
- RRR rear structure
- CABIN cabin structure
- the front structure and the rear structure also called “crushable zone” have a function (shock absorbing function) to absorb and mitigate an impact to the vehicle.
- the crushable zone is crushed by collision energy at the time of a vehicle collision. That is, in order to ensure the safety of the passenger in the cabin at the time of a vehicle collision, the front structure and the rear structure are required to be a structure that absorbs energy (collision energy) generated by the collision. Therefore, the frames constituting the front structure and the rear structure are required to absorb collision energy even when bending or crushing occurs at the time of collision.
- the frames used for the front structure and the rear structure are, for example, front side members, rear side members, bumper reinforcements, and crash boxes.
- the front side member includes a front side member rear that constitutes a rear end, and a front side member front that constitutes a front side than the rear end.
- the rear side member includes a rear side member rear that constitutes a rear end, and a rear side member front that constitutes a front side than the rear end.
- the cabin structure is also referred to as a "safety zone" and has a function (passenger protection function) for securing the safety of a passenger on the vehicle at the time of a vehicle collision. That is, in order to ensure the safety of the occupant in the event of a vehicle collision, the cabin structure is required to be a structure that is not easily crushed against impact force. Therefore, the frame constituting the cabin structure is required to be resistant to deformation and to have high load bearing performance.
- the frame used for the cabin structure is, for example, a front pillar (A pillar), a center pillar (B pillar), a rear pillar (C pillar, D pillar), a front pillar lower (A pillar lower), a side sill, a roof rail, a cross member, It is a tunnel etc.
- a structural material for example, a steel plate
- the frames constituting the above-described front structure, rear structure and cabin structure are also being replaced with thinned high-strength steel plates.
- the replacement requires that at least one of the amount of impact energy absorption and the load bearing performance be equal to that of the conventional frame.
- the thickness of the frame formed by the high strength steel plate can be thinner than the frame formed by the conventional steel plate. Thereby, it is considered that the weight of the frame can be reduced while maintaining the collision performance of the high strength frame equivalent to that of the conventional frame.
- FIG. 129 is a cross-sectional view showing an example of a change in cross-sectional shape of the thinned frame 900.
- FIG. 129 when a collision load is applied in the longitudinal direction (Y-axis direction) of the frame 900 and bending occurs in the frame 900, the bottom wall portion 900a bulges in the out-of-plane direction, and the side wall portion 900b faces It deforms so as to bend outward (cross-sectional shape 901).
- the bottom wall 900a is a bending inner side. As the bending further progresses, the out-of-plane deformation of the bottom wall portion 900a and the side wall portion 900b further progresses. As a result, the frame 900 buckles.
- the cross-sectional shape 902 of the buckled frame 900 deviates significantly from the original cross-sectional shape.
- FIG. 130 is a cross-sectional view showing another example of the change of the cross-sectional shape of the thinned frame 910.
- a collision load is applied in the longitudinal direction (Y-axis direction) of the frame 910 or a collision load is applied perpendicularly to the surface of the bottom wall portion 910a and the frame 910 is bent
- the bottom The wall 910 a is recessed and the side wall 910 b is deformed so as to bend (cross-sectional shape 911).
- the bottom wall part 910a is a bending inner side. As the bending progresses further, the bottom wall 910a and the side wall 910b are further deformed in the out-of-plane direction.
- the frame 910 buckles.
- the cross-sectional shape 912 of the buckled frame 910 deviates significantly from the original cross-sectional shape.
- buckling as shown in FIGS. 129 and 130 occurs in the frame 900 (910), the cross section collapses flat. Such deformation is called cross-sectional collapse.
- the flexural rigidity of the structural material depends on the thickness of the structural material. If the thickness of the frame is thinner than in the prior art, the surface of the frame is likely to be deformed out of plane. As a result, the bending stiffness of the frame is reduced. That is, bending deformation of the frame as shown in FIGS. 129 and 130 is likely to occur. When the cross section of the frame is deformed, the bending rigidity is gradually reduced because the height (thickness) of the frame is gradually reduced. Then, bending deformation progresses, and when buckling occurs, bending rigidity is rapidly reduced. As a result of the buckling, the load carrying capacity of the frame is extremely lower than the designed value. Therefore, the collision safety performance that the frame conventionally has is reduced.
- the present inventors improve the energy absorption amount at the time of load input with high mass efficiency by providing a bending induction portion that induces bending deformation at the time of load input and arranging the filling member at the bending induction portion. I thought of a hollow member that could When the filling member is placed on the frame, the place where it is placed is increased in thickness by the filling member, thereby increasing the bending rigidity.
- the bending induction portion preferentially deforms out of plane, it is effective to arrange the filling member in the bending induction portion.
- the frame is made to be tenaciously energy-absorptive as a result of the rigidity of the frame being increased by the filling member disposed in the bending induction portion until the frame is deformed out of plane and reaches buckling.
- the amount of the filling member that leads to an increase in weight can also be suppressed.
- the load is, for example, a collision load.
- the energy absorption amount at the time of load input is the absorption amount of collision energy by the frame when the collision load is input. To improve the amount of collision energy absorption means to improve the collision safety performance.
- the first embodiment is an embodiment in which a resin material is disposed in close contact with the second metal plate and in the bending induction portion.
- FIG. 2 is a perspective view showing a schematic configuration of an example of the frame 1 according to the first embodiment of the present invention.
- the frame 1 in the present specification is an example of a hollow member.
- the hollow member is used, for example, as a front side member and a rear side member of a car.
- the front side member includes a front side member rear that constitutes a rear end, and a front side member front that constitutes a front side than the rear end.
- the rear side member includes a rear side member rear that constitutes a rear end, and a rear side member front that constitutes a front side than the rear end.
- the hollow member is also used for a pillar of a car.
- the pillars include, for example, a front pillar (A pillar), a center pillar (B pillar), a rear pillar (C pillar, D pillar), and a front pillar lower (A pillar lower).
- the hollow member can also be used for floor reinforcement, floor cross member, bumper reinforcement, side sill, roof side rail, roof center reinforcement, crash box, tunnel and the like. Further, the hollow member is applicable not only to automobiles but also to other vehicles and self-propelled machines. Other vehicles and self-propelled machines include, for example, large-sized vehicles such as motorcycles, buses or trailers, trailers, railway vehicles, construction machines, mining machines, agricultural machines, general machines, aircraft, ships, etc. .
- the frame 1 according to the present embodiment includes a first structural member 2, a second structural member 3, an reinforcement 4, and a filling member 5.
- the hollow member 10 according to the present embodiment is formed of the first structural member 2 and the second structural member 3.
- FIG. 3 is a cross-sectional view showing a cross section orthogonal to the Y-axis direction of an example of the hollow member 10 according to the present embodiment.
- the configuration of the frame 1 according to the present embodiment will be described with reference to FIGS. 2 and 3.
- the 1st structural member 2 which concerns on this embodiment is an example of the structural member which forms the elongate hollow member 10, and has a hat-shaped cross-sectional shape.
- the first structural member 2 has a bottom wall 2a extending in the longitudinal direction (Y-axis direction), side walls 2b and 2b, flanges 2c and 2c, and ridges 2d and 2d. , 2e, 2e.
- the side wall portion 2 b is provided upright from both ends in the Z axis direction (width direction) of the bottom wall portion 2 a.
- the angle formed by the side wall portion 2b and the bottom wall portion 2a is not limited to the substantially vertical but is appropriately set according to the design of the member.
- the ridge line portion 2d is a portion which becomes a boundary between the bottom wall portion 2a and the side wall portion 2b.
- the flange portion 2c is provided so as to rise outward along the Z-axis direction from the end opposite to the bottom wall portion 2a of the side wall portion 2b.
- the angle between the flange portion 2c and the side wall portion 2b may be appropriately determined according to the design of the member.
- the ridge line portion 2e is a portion which is a boundary between the side wall portion 2b and the flange portion 2c.
- the second structural member 3 is an example of a structural member in which the hollow member 10 is formed together with the first structural member 2.
- the second structural member 3 is a plate-like member. As shown in FIG. 3, the second structural member 3 has a top wall 3 a and joints 3 c and 3 c.
- the top wall 3 a is a portion facing the bottom wall 2 a of the first structural member 2.
- the joint 3c is a portion that abuts on the flange 2c of the first structural member 2 and is joined to the flange 2c. That is, the top wall portion 3a is a portion corresponding to a region existing between the connection portions of the second structural member 3 and the pair of ridge portions 2e.
- the joint portion 3c is a portion in contact with the region of the flange portion 2c which is sandwiched between the ridge portion 2e and the end of the flange portion 2c in the second structural member 3.
- the hollow member 10 is formed of the first structural member 2 and the second structural member 3 by joining the flange portion 2c and the joint portion 3c. At this time, as shown in FIG. 3, the hollow member 10 has a closed cross section.
- the closed cross section is formed by the bottom wall portion 2a, the pair of side wall portions 2b and 2b, and the top wall portion 3a.
- the joining method of the flange part 2c and the junction part 3c is not specifically limited.
- the joining method may be welding such as laser welding, arc welding, spot welding, etc., mechanical bonding such as rivet or bolt fastening, or adhesion by an adhesive or brazing.
- the flange 2c and the joint 3c are joined by spot welding.
- the shape of the closed cross section which the hollow member 10 has is a substantially polygon.
- a substantially polygon means a closed plane figure which can be approximately expressed by a plurality of line segments.
- the closed cross section shown in FIG. 3 is a substantially quadrilateral having four line segments (corresponding to the bottom wall 2a, the side wall 2b, and the top wall 3a) and four apexes (corresponding to the ridges 2d and 2e). is there.
- the substantially square includes a rectangle, a trapezoid and the like.
- the hollow member 10 includes the bottom wall portion 2a and the pair of side wall portions 2b and 2b. It will be described as being formed by the ceiling wall 3a. An example of the shape of the closed cross section of the hollow member 10 will be described later.
- the hollow member 10 may have a closed cross-sectional structure as described above, or may have an open cross-sectional structure such as a U-shape. Further, the shape of the cross section orthogonal to the longitudinal direction of the hollow member 10 is not particularly limited. For example, the cross-sectional shape of the hollow member 10 may be a rectangular cross section or a circular cross section.
- the hollow member according to the present embodiment is an example of a metal member.
- the first structural member 2 and the second structural member 3 according to the present embodiment are formed of, for example, a metal plate such as a steel plate.
- the 1st structural member 2 and the 2nd structural member 3 which concern on this embodiment are an example of a 1st metal plate.
- the plate thickness of both structural members is preferably 2.3 mm or less in a frame structure often used in a large vehicle such as a bus, and the plate is used in a monocoque structure vehicle often used in a normal size vehicle.
- the thickness is preferably 1.8 mm or less, and in a small vehicle such as a motorcycle, the plate thickness is preferably 1.4 mm or less.
- the bending induction portion when the bending induction portion is provided on the relatively thin metal plate having such a plate thickness, the bending induction portion can generate the out-of-plane deformation prior to other portions.
- the strength of the first structural member 2 and the second structural member 3 according to the present embodiment is not particularly limited.
- the tensile strength of both structural members is preferably 780 MPa or more.
- the tensile strength of both structural members is more preferably 980 MPa or more. This is because the metal member constituting the hollow member is disposed on the surface to which the highest tensile stress is applied in the bending induced portion.
- Members with low tensile strength also have low yield strength. When the yield strength is low, the hollow member is easily plastically deformed when out-of-plane deformation occurs. As plastic deformation progresses, the hollow member buckles.
- the reinforcement 4 is disposed inside the hollow member 10 as shown in FIG.
- the reinforcement 4 has a main surface 4a and a joint 4b, as shown in FIG.
- the reinforcement 4 is disposed so as to face the bottom wall 2 a and the top wall 3 a in the main surface 4 a according to the present embodiment.
- the bonding portion 4b is bonded to the side wall portion 2b.
- the main surface portion 4a is provided so as to bridge between the pair of side wall portions 2b and 2b.
- the reinforcement 4 suppresses the deformation of the pair of side wall portions 2b, 2b, so that the cross-sectional deformation of the hollow member 10 can be suppressed.
- the joining method of the junction part 4b and the side wall part 2b is not specifically limited.
- the said joining method is not specifically limited similarly to joining of the flange part 2c and the junction part 3c.
- the joint 4 b and the side wall 2 b are joined by spot welding.
- the reinforcement 4 also has a function as a threshold plate for dividing the arrangement area of the filling member 5.
- the reinforcement 4 according to the present embodiment is an example of a second metal plate.
- the reinforcement 4 according to the present embodiment is formed of, for example, a metal plate such as a steel plate.
- the material forming the reinforcement 4 may be a plastic, a carbon fiber, an alloy plate or a composite material.
- the filling member 5 is a resin material.
- the filling member 5 is made of urethane resin, epoxy resin or any other resin.
- the filling member 5 can be formed with a Young's modulus of at most about 300 MPa if it is a urethane resin and at most about 3000 MPa if it is an epoxy resin.
- the filling member 5 may be, for example, a hard foam filling member made of a foamed resin. After the foamed resin is filled inside the hollow member 10, the resin is cured by a chemical change to form the filling member 5.
- the Young's modulus of the filling member 5 is preferably 20 MPa or more.
- the Young's modulus of the filling member 5 can be changed according to the density of the resin forming the filling member 5. However, the higher the density of the resin, the more difficult it is to mold the resin, so the Young's modulus of the filling member 5 is preferably 300 to 400 MPa at the maximum.
- the hollow member 10 according to the present embodiment is provided with the bending portions 6A and 6B.
- the bending portion 6 is a portion where the hollow member 10 bends. That is, the bending portion 6 is a portion where the radius of curvature in the longitudinal direction of the locus of the center of gravity defined along the center of gravity of the cross section of the hollow member 10 is 260 mm or less.
- FIG. 4 is a schematic view visualizing the locus of the center of gravity of the cross section of the hollow member 10. As shown in FIG. 4, the locus C1 of the center of gravity of the cross section of the hollow member 10 is bent at the bent portions 6A and 6B.
- the hollow member 10 provided with such a bending portion 6 is obtained, for example, by press-forming in a shape in which a part of the first structural member 2 and the second structural member 3 is bent, and assembling these structural members .
- Such a bending part 6 is suitably provided according to the structure of the vehicle to which the flame
- the locations where bending deformation is permitted include, for example, locations where the bent frame 1 does not contact the occupant and important parts even if the frame 1 bends at that location.
- the number of the bending portions 6 provided in the hollow member 10 is not particularly limited, and is appropriately determined according to the structure of the vehicle as described above.
- the bending induction portion is provided on a part of the hollow member 10 in the longitudinal direction.
- bending deformation occurs in the bending induced portion due to the collision in the longitudinal direction.
- the hollow member 10 satisfies the condition of the curvature radius when a collision load is input.
- Bending deformation occurs in at least one of the bending portions 6A and 6B.
- the energy required for this bending deformation is supplied from the energy due to the collision. That is, the collision energy can be absorbed by the bending deformation of the hollow member 10.
- the reinforcement 4 is provided inside the bending inducing portion of the hollow member 10 so as to support the hollow member 10 from the inside.
- the length in the Z-axis direction of the bottom wall 2a is preferably equal to or greater than the length in the X-axis direction of the side wall 2b.
- FIG. 5 is a cross-sectional view in a cross section orthogonal to the Z-axis direction of an example of the frame 1 according to the present embodiment.
- the cross-sectional view shown in FIG. 5 corresponds to the cross-sectional view of the hollow member 10 taken along the line I-I shown in FIG.
- the hollow member 10 has two bends 6A and 6B.
- the bending portion 6A is bent in the direction of the bottom wall portion 2a so that the bottom wall portion 2a is bent inside.
- the bending portion 6B is bent in the direction of the ceiling wall portion 3a so that the ceiling wall portion 3a is bent inside.
- These bent portions 6A, 6B correspond to bending induction portions in the frame 1.
- the filling members 5A and 5B according to the present embodiment are disposed in close contact with the main surface 4a of the reinforcement 4, respectively.
- the filling member 5A is provided in a portion facing the bottom wall 2a.
- the filling member 5B is provided in the part facing the top wall part 3a.
- the length L FL of the hollow member 10 according to the present embodiment is, for example, about several hundred mm.
- L FL Length in the Y-axis direction (longitudinal direction) of the hollow member 10
- D FL1 Cross-sectional dimension in the X-axis direction at the end on the collision side of the hollow member 10
- D FL2 cross-sectional dimension in the X-axis direction at the other end of the hollow member 10
- L R Length of reinforcement 4 in the longitudinal direction.
- S FL Offset length of the second structural member 3 before and after the bending portion 6 in the longitudinal direction.
- L FMA , L FMB Length in the Y-axis direction of the filling members 5A and 5B.
- FIG. 6 and 7 are cross-sectional views taken along the lines II-II and III-III of the frame 1 shown in FIG.
- the filling member 5A is disposed in close contact with the main surface 4a in a space 7A formed by the bottom wall 2a, the main surface 4a, and the pair of side walls 2b.
- the filling member 5A should just be arrange
- the filling member 5A may not necessarily be disposed on the space 7A side. More specifically, the filling member 5A may be disposed in close contact with the main surface 4a in the space opposite to the space 7A with respect to the reinforcement 4. Further, as shown in FIG.
- the filling member 5B is in close contact with the main surface portion 4a in the space 7B formed by the top wall portion 3a, the main surface portion 4a and the pair of side wall portions 2b.
- the filling member 5B may not necessarily be disposed in the space 7B as in the example of the filling member 5A. More specifically, the filling member 5B may be disposed in close contact with the main surface 4a in the space opposite to the space 7B with respect to the reinforcement 4.
- the filling member 5A is disposed in close contact with the main surface 4a of the reinforcement 4.
- the resistance to the out-of-plane deformation of the main surface 4a is increased.
- the reinforcement 4 can suppress the deformation of the side wall portion 2b due to the input of the collision load, the deformation of the closed cross section of the hollow member 10 is also suppressed. Therefore, the collision safety performance of the frame 1 can be more reliably exhibited.
- the filling member 5 ⁇ / b> A is disposed in intimate contact with the inner surface of the bottom wall portion 2 a in the bending portion 6.
- the resistance to the out-of-plane deformation of the bottom wall portion 2a in the bending portion 6A becomes high.
- the cross-sectional deformation of the closed cross section of the hollow member 10 is directly suppressed by the filling member 5A. Therefore, the collision safety performance of the frame 1 can be further enhanced.
- the filling member 5A connects the main surface 4a and the bottom wall 2a.
- the connection means that the filling member 5A is disposed in close contact with each other across the main surface portion 4a and the bottom wall portion 2a.
- the filling member 5A is disposed continuously in close contact with the reinforcement 4 and the side wall portion 2b. That is, the filling member 5A is disposed in close contact with the inside of the connection portion 4c connecting the main surface portion 4a and the side wall portion 2b.
- the filling member 5A is disposed in close contact with the inside of the connection portion 4c connecting the main surface portion 4a and the side wall portion 2b.
- the filling member 5A is disposed continuously in close contact with the bottom wall 2a and the side wall 2b. That is, the filling member 5A is disposed in close contact with the inner side of the ridge portion 2d. Similar to the plastic deformation at the connecting portion 4c described above, when a collision load on the frame 1 is input and bending occurs at the bending portion 6A, plastic deformation locally occurs at the ridge portion 2d. Therefore, local plastic deformation occurring in the ridge portion 2 d can be suppressed by closely (preferably, adhesively) arranging the filling member 5A at such a position. Thereby, the collision safety performance of the frame 1 can be more effectively enhanced.
- the filling member 5A is disposed in close contact with the inside of all the ridges 2d and the connecting portion 4c. If the filling member 5A is disposed inside of at least one of the ridge line portion 2d and the connection portion 4c, the improvement of the collision safety performance is exhibited.
- the Young's modulus of the filling member 5 is higher, the effect of suppressing the plastic deformation described above by the filling member 5 is enhanced.
- the place where the cross-sectional deformation occurs that is, the place where the cross-sectional deformation is to be suppressed can be limited to the bending portion 6 or the periphery thereof.
- position the filling member 5 can also be limited in anticipation of the place which carries out a cross-sectional deformation
- the reinforcement 4 is provided inside the bending portion 6 which is a bending induction portion, and the filling member 5 is disposed in close contact with the reinforcement 4.
- the reinforcement 4 since the cross-sectional shape of the hollow member 10 is maintained by the reinforcement 4, the cross-sectional deformation of the hollow member 10 can be suppressed. Therefore, even when the plate thickness of the hollow member 10 and the reinforcement 4 is reduced in order to reduce the weight of the vehicle body, the collision safety performance of the frame 1 can be maintained.
- the reinforcement 4 shown in FIG. 5 is formed of one member and is provided to face each of the bottom wall portion 2a and the top wall portion 3a of the bending portion 6, but the present invention is not limited thereto. It is not limited to.
- a plurality of reinforcements 4 may be provided to be opposed to the bottom wall 2a or the top wall 3a in the bending induction portion such as the bending portion 6 or the like.
- the reinforcement 4 may be provided entirely along the longitudinal direction of the hollow member 10. That is, the position and length of the reinforcement 4 in the longitudinal direction of the hollow member 10 are not particularly limited as long as the reinforcement 4 is provided inside the bending induction portion.
- the filling member 510 disposed in close contact with the reinforcement 4 suppresses out-of-plane deformation of the reinforcement 4. If the out-of-plane deformation of the reinforcement 4 can be suppressed, the out-of-plane deformation of the wall (for example, the side wall 2 b) to which the reinforcement 4 is connected can be suppressed. As a result, the cross-sectional deformation of the hollow member 10 can be suppressed.
- FIG. 8 is a cross-sectional view of the frame 1 for explaining a first arrangement example of the filling member according to the present embodiment.
- the cross sectional view shown in FIG. 8 corresponds to the cross section of the frame 1 taken along the line II-II of the frame 1 shown in FIG.
- the filling member 510 is disposed in close contact (preferably adhered) to the central portion of the surface of the main surface 4 a facing the bottom wall 2 a.
- the resistance to the out-of-plane deformation of the main surface portion 4a can be increased. That is, the out-of-plane deformation of the reinforcement 4 can be suppressed and the buckling of the reinforcement 4 can be suppressed also by closely arranging the filling member 510 only on a part of the main surface portion 4 a. That is, the effect of suppressing the cross-sectional deformation of the hollow member 10 can be sufficiently obtained. Therefore, if it is possible to ensure the required collision safety performance, as shown in FIG.
- the filling member 510 may be arranged only on a part of the main surface 4a. As a result, since the filling amount of the filling member 510 is reduced, the cost of the filling member 510 and the weight of the frame 1 can be kept low.
- the arrangement position of the filling member 510 is not restricted to the side facing the bottom wall part 2a of the main surface part 4a.
- the filling member 510 shown in FIG. 8 may be provided on the main surface 4a on the side facing the top wall 3a. That is, as long as the filling member 510 is disposed in close contact with the reinforcement 4, the arrangement surface of the main surface 4 a of the filling member 510 is not particularly limited.
- the filling member 511 connects the reinforcement 4 and the wall (for example, the bottom wall 2 a) opposed to the reinforcement 4. Since the walls facing the reinforcement 4 and the reinforcement 4 via the filling member 511 restrain each other, out-of-plane deformation of the reinforcement 4 and the wall facing the reinforcement 4 can be suppressed. Furthermore, since the out-of-plane deformation of the reinforcement 4 can be suppressed, the out-of-plane deformation of the wall portion to which the reinforcement 4 is connected can also be suppressed. As a result, the cross-sectional deformation of the hollow member 10 can be suppressed.
- FIG. 9 is a cross-sectional view of the frame 1 for explaining a second arrangement example of the filling member according to the present embodiment.
- the cross sectional view shown in FIG. 9 corresponds to the cross section of the frame 1 taken along the line II-II of the frame 1 shown in FIG.
- the filling member 511 is disposed in close contact (preferably adhered) to each part so as to connect the central part of the main surface 4a and the central part of the bottom wall 2a.
- the out-of-plane deformation of the reinforcement 4 and the bottom wall 2a can be more effectively suppressed.
- the filling member 511 connects a part of the main surface 4a and a part of the bottom wall 2a, the effect of suppressing the cross-sectional deformation of the hollow member 10 is sufficiently obtained. be able to. Therefore, if it is possible to secure the required collision safety performance, as shown in FIG.
- filling member 511 is arranged to connect only a part of main surface 4a and bottom wall 2a. It is also good. As a result, the filling amount of the filling member 511 is reduced, so that the cost of the filling member 511 and the weight of the frame 1 can be reduced.
- the arrangement position of the filling member 511 is not limited to between the main surface portion 4a and the bottom wall portion 2a.
- the filling member 511 shown in FIG. 9 may be disposed between the main surface portion 4a and the top wall portion 3a, and may connect the main surface portion 4a and the top wall portion 3a.
- the filling member 511 may connect any one of the side wall 2b and the main surface 4a. That is, as long as the filling member 511 is disposed in close contact with the reinforcement 4, the part to be connected by the filling member 511 is not particularly limited.
- the arrangement position in the Z-axis direction of the main surface portion 4a (and the bottom wall portion 2a) of the filling member 5 shown in the first arrangement example and the second arrangement example is not particularly limited. However, it is preferable that the filling member 5 be disposed in close contact with the central portion of the main surface 4a where the amount of deflection of the main surface 4a receiving the bending moment is the largest. Furthermore, the width of the filling member 5 on the main surface portion 4a is preferably 20% or more of the width of the main surface portion. It is more desirable if it is 30% or more. Thereby, it is possible to prevent the collision energy from being biased to the reinforcement 4 by the elastic deformation of the reinforcement 4. When the collision energy is biased to the reinforcement 4, energy absorption by bending at the collision is hindered.
- the filling member 5 may not necessarily be disposed so as to closely fill the space 7A. If the filling member 5 is disposed in close contact with at least the major surface 4 a of the reinforcement 4, the effect of suppressing the cross-sectional deformation of the hollow member due to the reinforcement 4 is exhibited.
- the filling amount and the arrangement position of the filling member 5 in the space 7A can be appropriately adjusted based on the required collision safety performance of the frame 1 and the weight of the frame 1, the filling cost of the filling member 5, and the like.
- the filling member 5 may not necessarily be provided in the space 7A. That is, the filling member 5 may be disposed in the space of the hollow member 10 on the side different from the space 7A.
- the filling member 512 connects the reinforcement 4 and the wall portion to which the reinforcement 4 is connected. Since the reinforcement 4 and the wall to which the reinforcement 4 is connected are restrained by the filling member 512, the angle formed by the reinforcement 4 and the wall to which the reinforcement 4 is connected is fixed. As a result, the cross-sectional deformation of the hollow member 10 can be suppressed.
- FIG. 10 is a cross-sectional view of the frame 1 for explaining a third arrangement example of the filling member according to the present embodiment.
- the cross sectional view shown in FIG. 10 corresponds to the cross section of the frame 1 taken along the line II-II of the frame 1 shown in FIG.
- the filling member 512 includes the main surface 4a, the bottom wall 2a, and the pair of spaces 7A formed by being surrounded by the main surface 4a, the bottom wall 2a, and the pair of side walls 2b. It is arrange
- the second embodiment is in a form in which a resin material is disposed in the bending induction portion in close contact with the inner surface of at least one of the bottom wall or the top wall of the metal member.
- FIG. 11 is a perspective view showing a schematic configuration of an example of a frame 1 according to a second embodiment of the present invention.
- the frame 1 according to the present embodiment includes a first structural member 2, a second structural member 3, and a filling member 5 (5A, 5B).
- the hollow member 10 according to the present embodiment is formed by the first structural member 2 and the second structural member 3.
- the configuration of the frame 1 shown in FIG. 11 is the same as that described in the first embodiment with reference to FIGS. 2 to 4 except for the point having no reinforcement 4 and the arrangement of the filling member 5.
- frame 1 which concerns on this embodiment is demonstrated.
- FIG. 12 is a cross-sectional view showing a cross section orthogonal to the Z-axis direction of an example of the frame 1 according to the present embodiment.
- the cross-sectional view shown in FIG. 12 corresponds to the cross-sectional view of the hollow member 10 taken along the line IV-IV shown in FIG.
- the hollow member 10 is provided with a bent portion 6A which is bent in a direction in which the bottom wall portion 2a is bent inward, and a bent portion 6B in which the top wall portion 3a is bent in a bent inward direction. ing.
- the filling members 5A and 5B according to the present embodiment are in close contact with the inner surface of the bottom wall 2a or the top wall 3a in which the bending portion 6A and the bending portion 6B are provided. Be placed. These bent portions 6 correspond to bending induced portions in the frame 1.
- L FL Length in the Y-axis direction (longitudinal direction) of the hollow member 10
- D FL1 Cross-sectional dimension in the X-axis direction at the end on the collision side of the hollow member 10
- D FL2 cross-sectional dimension in the X-axis direction at the other end of the hollow member 10
- S FL Offset length of the second structural member 3 before and after the bending portion 6 in the longitudinal direction.
- L FMA , L FMB Length in the Y-axis direction of the filling members 5A and 5B.
- FIG. 13 is a cross-sectional view taken along the line VV of the frame 1 shown in FIG.
- FIG. 14 is a cross-sectional view taken along the line VI-VI of the frame 1 shown in FIG.
- the filling member 5A is disposed in close contact (preferably, adhered) to the inner surface of the bottom wall 2a.
- the inner surface of the bottom wall 2a corresponds to the bending inner portion of the bending portion 6A.
- the filling member 5A is disposed in intimate contact with the inner surface of the central portion of the bottom wall 2a.
- the filling member 5B is disposed in close contact with the inner surface of the ceiling wall 3a.
- the inner surface of the top wall 3a corresponds to the bending inner portion of the bending portion 6B.
- the thickness a in the X-axis direction of the filling member 5A is not particularly limited, and the thickness a is appropriately set according to the load resistance performance and the weight required for the frame 1.
- a plate material such as a reinforcement (not shown) may be provided inside the hollow member 10.
- the filling member 5A in close contact with the inner surface of the central portion of the bottom wall 2a, out-of-plane deformation of the bottom wall 2a can be efficiently suppressed.
- the width of the filling member 5A on the bottom wall 2a is preferably 20% or more of the width of the bottom wall 2a. It is more desirable if it is 30% or more. Further, it is preferable that the distances b 1 and b 2 be the same value. The size of the distance b 1 and b 2 are determined according to the thickness of the X-axis direction of the filling member 5A which is set in accordance with the load carrying capacity and weight are required to frame 1.
- the filling member 5B is disposed on the top wall 3a.
- the filling member 5B is the same as FIG. 13 except that it is disposed on the top wall portion 3a.
- the width of the filling member 5B on the top wall 3a is preferably 20% or more of the width of the top wall 3a in the closed cross section. It is more desirable if it is 30% or more.
- close contact means being disposed in contact without a gap.
- adhesions in particular, adhesions which restrain each other are most preferable. Even when they do not restrain one another, the effect of suppressing the out-of-plane deformation of at least one of the wall portions forming the hollow member 10 is exhibited.
- FIGS. 129 and 130 it is assumed that a change in cross-sectional shape as shown in FIGS. 129 and 130 occurs in the frame 1 according to the present embodiment.
- the effect of suppressing the out-of-plane deformation of the bottom wall portion 2a or the top wall portion 3a by the filling member 5 is significantly exhibited.
- the filling member 5 and the inner surface of at least one of the bottom wall portion 2a or the top wall portion 3a are disposed in close contact with each other without being restricted to each other, the bottom wall portion 2a or the top wall portion 3a is deformed out of plane
- the filling member 5 and the inner surface are partially separated.
- at least a part of the filling member 5 is in contact with the inner surface.
- the Young's modulus of the filling member 5 is higher, the effect of suppressing the plastic deformation described above by the filling member 5 is enhanced.
- the place where the cross-sectional deformation occurs that is, the place where the cross-sectional deformation is to be suppressed can be limited to the bending portion 6 or the periphery thereof.
- the place which should arrange the filling member 5 can also be limited in anticipation of the place which carries out cross-sectional deformation. That is, in the present embodiment, it is possible to reduce the weight increase associated with the increase in the Young's modulus of the filling member 5.
- the filling member 5A is disposed in intimate contact with the inner surface of the bottom wall portion 2a included in the inside of the bending portion 6 which is a bending induction portion.
- the filling member 5B is disposed in close contact with the inner surface of the top wall 3a included.
- the weight of the frame 1 can be considerably increased by arranging the filling member 5 having a low mass density in the above-mentioned portion. Therefore, the load bearing performance of the frame 1 can be maintained high. That is, for example, easy bending of the frame 1 in the bending induced portion can be prevented.
- the filling member connects the end of the side wall 2b and the bottom wall 2a or the top wall 3a. That is, the filling member is disposed adjacent to the ridge 2d or the ridge 2e.
- the filling member suppresses the change in the angle between the side wall 2b and the bottom wall 2a or the top wall 3a. That is, the filling member suppresses deformation of the ridge 2d or the ridge 2e. As a result, the cross-sectional deformation of the hollow member 10 can be suppressed.
- FIG. 15 is a cross-sectional view of the frame 1 for explaining a first arrangement example of the filling member according to the present embodiment.
- the cross-sectional view shown in FIG. 15 corresponds to the cross section of the frame 1 taken along the line VV of the frame 1 shown in FIG.
- the filling member 520 is arranged in close contact (preferably, adhered) with the side wall 2 b and the bottom wall 2 a continuously. That is, the filling member 520 is disposed in close contact with the inner side of the ridge portion 2 d.
- plastic deformation locally occurs in the ridge portion 2d.
- the plastic deformation accelerates the falling of the side wall 2b in the out-of-plane direction. Therefore, the local plastic deformation which arises in ridgeline part 2d can be controlled by closely arranging filling member 520 in the position concerned. Thereby, it is possible to suppress the falling of the side wall portion 2b in the out-of-plane direction. Therefore, the cross-sectional deformation of the frame 1 can be suppressed more effectively.
- the thickness a of the filling member 520 is appropriately set in accordance with the load-bearing performance and the weight required for the frame 1.
- the arrangement of the filling members shown in FIG. 15 can be similarly applied to the cross section of the frame 1 taken along the line VI-VI of the frame 1 shown in FIG.
- the filling member 520 is disposed in intimate contact with the inner surface of the ceiling wall 3a and the inside of the ridge line 2e.
- FIG. 16 is a cross-sectional view of the frame 1 for explaining a second arrangement example of the filling member according to the present embodiment.
- the cross sectional view shown in FIG. 16 corresponds to the cross section of the frame 1 taken along the line VV of the frame 1 shown in FIG.
- the filling members 521a and 521b according to this arrangement example are arranged in close contact (preferably, adhesively) on the inner side of each of the ridge portions 2d.
- This arrangement it is possible to suppress the local plastic deformation occurring in the ridge portion 2 d. Thereby, it is possible to reduce the falling of the side wall 2b in the out-of-plane direction. Therefore, cross-sectional deformation of the frame 1 can be suppressed.
- the cross-sectional deformation of the frame 1 can be reduced with little increase in the weight of the frame 1. It can be suppressed.
- FIG. 17 is a cross-sectional view of the frame 1 for explaining a third arrangement example of the filling member according to the present embodiment.
- the cross sectional view shown in FIG. 17 corresponds to the cross section of the frame 1 taken along the line VV of the frame 1 shown in FIG.
- the filling member 521c according to this arrangement example is arranged in close contact locally on one inner side of the ridge portion 2d. Thereby, the local plastic deformation which arises in ridgeline part 2d in which filling member 521c is arranged can be controlled. Further, since the filling amount of the filling member can be reduced, the weight of the frame 1 can be increased.
- the filling member shown in FIGS. 16 and 17 not only the out-of-plane deformation of the bottom wall portion 2a but also the local plastic deformation of the ridge portion 2d can be suppressed.
- whether the filling member is provided inside one or both of the ridge portions 2 d is preferably determined according to the collision safety performance and weight required for the frame 1.
- the thickness a (a 1 , a 2 ) in the Z-axis direction and the thickness c (c 1 , c 2 ) in the X-axis direction of the filling members 521 a, 521 b and 521 c are appropriately set.
- the filling members may be separately and closely disposed on the inner surface of the central portion of the bottom wall portion 2a and the inside of the ridge portion 2d. If each of the filling members is disposed in close contact with the inner surface of the central portion of the bottom wall portion 2a and the inside of the ridge portion 2d, the effect of suppressing the cross-sectional deformation of the frame 1 can be sufficiently obtained.
- the arrangement of the filling members shown in FIGS. 16 and 17 can be similarly applied to the cross section of the frame 1 taken along the line VI-VI of the frame 1 shown in FIG.
- the filling members 521a to 521c are disposed in close contact with the inner side of the ridge portion 2e.
- the filling member may be disposed in close contact with the inner surface of the side wall portion 2b as well as the inner side of the ridge line portion 2d.
- FIG. 18 and FIG. 19 are cross-sectional views of the frame 1 for explaining each modification of the second arrangement example and the third arrangement example of the filling member according to the present embodiment. As shown in FIGS. 18 and 19, the filling members 522a, 522b and 522c may be disposed in close contact with the inner surface of the side wall 2b as well as the inside of the ridge line 2d. Furthermore, the filling members 522a, 522b and 522c may be disposed in close contact with the inside of the ridge portion 2e.
- the load resistance performance of the frame 1 can be made equal to or higher than the arrangement example shown in FIGS. 16 and 17.
- the thickness a (a 1 , a 2 ) of the filling members 522 a, 522 b and 522 c is appropriately set according to the load-bearing performance and weight required for the frame 1.
- FIG. 20 is a cross-sectional view of the frame 1 for explaining a fourth arrangement example of the filling member according to the present embodiment.
- the cross sectional view shown in FIG. 20 corresponds to the cross section of the frame 1 taken along the line VV of the frame 1 shown in FIG.
- the filling member 523 As shown in FIG. 20, the filling member 523 according to this arrangement example is arranged in close contact (preferably, adhesively) continuously with the bottom wall 2a and the inner surfaces of the pair of side walls 2b. In the side wall portion 2b, the frame 1 is easily bent to cause an out-of-plane direction to fall. According to the arrangement shown in FIG. 20, since the filling member 523 is disposed in close contact with the inner surface of the side wall 2b, the filling member 523 can suppress the out-of-plane deformation of the side wall 2b.
- the filling member 523 shown in FIG. 20 is disposed continuously in close contact with the pair of side wall portions 2b and the bottom wall portion 2a
- the present invention is not limited to this example.
- the filling members 523 may be separately and closely disposed on the inner surfaces of the pair of side wall portions 2b and the bottom wall portion 2a.
- the filling member 523 may be disposed in close contact with any one of the pair of side wall portions 2 b and the bottom wall portion 2 a continuously. That is, in the cross section orthogonal to the Y-axis direction, the filling member 523 may be provided in an L shape.
- the filling member 523 is provided on either of the pair of side wall portions 2b and the bottom wall portion 2a, not only the load bearing performance of the frame 1 but also the absorption characteristics of the collision energy of the frame 1 can be improved. it can.
- the arrangement position and filling amount of the filling member can be appropriately set according to the collision safety performance and weight required for the frame 1. Also, the thicknesses a 1 , a 2 and a 3 of the filling member 523 shown in FIG. 20 may be set appropriately.
- the arrangement of the filling members shown in FIG. 20 can be similarly applied to the cross section of the frame 1 taken along the line VI-VI of the frame 1 shown in FIG.
- the filling member 523 is disposed continuously in close contact with the pair of side wall portions 2 b and the top wall portion 3 a.
- the arrangement of the filling member according to the present embodiment shown in FIGS. 13 to 20 is also applied to a frame formed by a hollow member having no bending induction portion realized by a bending portion, a hole portion or the like. It can apply.
- the filling member 5 may be provided on the bottom wall 2a and the top wall 3a of the hollow member 10 along the longitudinal direction of the hollow member 10. .
- the cross-sectional deformation of the frame 1 can be suppressed. That is, by arranging the filling member 5 in close contact with the inner surface of the hollow member 10 corresponding to the direction in which it is desirable not to bend, it is possible to suppress bending of the frame 1 at least in the direction.
- FIG. 21 is a perspective view showing a schematic configuration of an example of a frame 1 according to a third embodiment of the present invention.
- a frame 1 according to the present embodiment includes a first structural member 2, a second structural member 3, and a filling member 5 (5A, 5B).
- the hollow member 10 according to the present embodiment is formed by the first structural member 2 and the second structural member 3.
- the configuration of the frame 1 shown in FIG. 21 is the same as that described in the first embodiment with reference to FIGS. 2 to 4 except for the point having no reinforcement 4 and the arrangement of the filling member 5.
- frame 1 which concerns on this embodiment is demonstrated.
- FIG. 22 is a cross-sectional view showing a cross section orthogonal to the Z-axis direction of an example of the frame 1 according to the present embodiment.
- the cross-sectional view shown in FIG. 22 corresponds to the cross-sectional view of the hollow member 10 along the line VII-VII shown in FIG.
- the hollow member 10 is provided with a bent portion 6A which is bent in a direction in which the bottom wall portion 2a is bent inward and a bent portion 6B in which a top wall portion 3a is bent in a bent inward direction. ing.
- These bent portions 6 correspond to bending induced portions in the frame 1.
- the filling members 5A and 5B according to the present embodiment are disposed in close contact with the inner surface of the portion of the side wall portion 2b where the bend 6A and the bend 6B are provided.
- L FL Length in the Y-axis direction (longitudinal direction) of the hollow member 10
- D FL1 Cross-sectional dimension in the X-axis direction at the end on the collision side of the hollow member 10
- D FL2 cross-sectional dimension in the X-axis direction at the other end of the hollow member 10
- S FL Offset length of the second structural member 3 before and after the bending portion 6 in the longitudinal direction.
- L FMA , L FMB Length in the Y-axis direction of the filling members 5A and 5B.
- FIG. 23 is a cross-sectional view taken along line VIII-VIII of frame 1 shown in FIG.
- the filling member 5A is disposed in close contact with (preferably adhered to) the inner surface of the side wall 2b.
- the filling member 5B is disposed in close contact with the inner surface of the side wall portion 2b in the cross section taken along the line IX-IX of the frame 1 shown in FIG.
- the filling member 5A restrains the side wall 2b by this arrangement, it is possible to suppress the out-of-plane deformation of the side wall 2b. That is, in the bending deformation of the frame 1 when the collision load is input to the frame 1, it is possible to suppress the falling of the side wall portion 2b in which the filling member 5A is disposed in the out-of-plane direction. Therefore, since the cross-sectional deformation of the frame 1 is suppressed even after the bending deformation of the frame 1, the absorption characteristic of the collision energy of the frame 1 can be enhanced. In addition, since the arrangement of the filling member 5A is limited to a portion that contributes to shock absorption, the hollow member does not become heavy.
- the filling member 5A is disposed continuously in close contact with the side wall 2b and the bottom wall 2a. That is, the filling member 5A is disposed in close contact with the inner side of the ridge portion 2d.
- plastic deformation locally occurs in the ridge portion 2d.
- the plastic deformation accelerates the falling of the side wall 2b in the out-of-plane direction. Therefore, the local plastic deformation which arises in ridgeline part 2d can be controlled by contact member 5A being arranged in close contact with this position. Thereby, it is possible to suppress the falling of the side wall portion 2b in the out-of-plane direction. Therefore, the collision energy absorption characteristic of the frame 1 can be more effectively enhanced.
- the filling member 5A may be disposed continuously in close contact with the side wall 2b and the top wall 3a. Thereby, the local plastic deformation which arises in ridgeline part 2e can be controlled. As a result, the cross-sectional deformation of the hollow member 10 can be suppressed, and the collision safety performance of the frame 1 can be further enhanced.
- the filling member 5A is preferably disposed in close contact with the inside of at least one of the ridge portions 2d and 2e as shown in FIG. At this time, the bending portion 6A bends the bottom wall portion 2a in a bending inner direction. At the inside of bending, a force is applied in the compression direction by the bending of the frame 1 to easily cause plastic deformation at the ridge portion. Therefore, it is more preferable that the filling member 5A be disposed at least in close contact with the inner side of the ridge line portion 2d existing in the boundary between the bottom wall portion 2a and the side wall portion 2b.
- the filling member 5A is disposed on the inner surface of the upper side wall 2b in the drawing, but may be disposed on the inner surface of the lower side wall 2b.
- the thickness a of the filling member 5A is not particularly limited, and the thickness a is appropriately set according to the absorption characteristics and the weight of the collision energy required for the frame 1.
- a plate material such as a reinforcement (not shown) may be provided inside the hollow member 10.
- close contact means being disposed in contact without a gap.
- adhesions in particular, adhesions which restrain each other are most preferable. Even when they do not restrain one another, the effect of suppressing the out-of-plane deformation of at least one of the wall portions forming the hollow member 10 is exhibited.
- FIGS. 129 and 130 it is assumed that a change in cross-sectional shape as shown in FIGS. 129 and 130 occurs in the frame 1 according to the present embodiment.
- the filling member 5 In the case where the filling member 5 is adhered to the inner surface of the side wall 2b, when the side wall 2b is out-of-plane deformed, the filling member 5 also follows the out-of-plane deformation of the inner surface.
- the effect of suppressing the out-of-plane deformation of the side wall portion 2 b by the filling member 5 is significantly exhibited.
- the side wall portion 2b may be partially separated from the inner surface when the side wall portion 2b is deformed out of plane. Exists.
- the inner surface is deformed out of plane, at least a part of the filling member 5 is in contact with the inner surface. Therefore, even in the state where the filling member 5 and the inner surface are in close contact with each other without being restricted to each other, the effect of suppressing the out-of-plane deformation of the side wall portion 2b by the filling member 5 is sufficiently exhibited.
- the Young's modulus of the filling member 5 is higher, the effect of suppressing the plastic deformation described above by the filling member 5 is enhanced.
- the place where the cross-sectional deformation occurs that is, the place where the cross-sectional deformation is to be suppressed can be limited to the bending portion 6 or the periphery thereof.
- position the filling member 5 can also be limited in anticipation of the place which carries out a cross-sectional deformation
- the filling member 5 is disposed in close contact with the inner surface of the side wall portion 2 b included in the inside of the bending portion 6 which is the bending induction portion.
- the filling members 5A and 5B are separately provided in the bending portions 6A and 6B, but one filling member 5 is provided across the bending portions 6A and 6B. It may be done. That is, as long as the filling member 5 is provided in close contact with the side wall 2b included at least inside the bending induction portion, the arrangement position, size, etc. of the filling member 5 in the longitudinal direction of the hollow member 10 are not particularly limited.
- out-of-plane deformation of the side wall 2b is suppressed by the filling member 530a or 531a disposed in close contact with the side wall 2b.
- cross-sectional deformation of the frame 1 can be suppressed.
- FIG. 24 is a cross-sectional view of the frame 1 for explaining a first arrangement example of the filling member according to the present embodiment.
- the cross sectional view shown in FIG. 24 corresponds to the cross section of the frame 1 taken along the line VIII-VIII of the frame 1 shown in FIG.
- the filling members 530a and 530b according to this arrangement example are arranged in close contact (preferably adhered) to the inner surfaces of the pair of side wall portions 2b.
- this arrangement it is possible to suppress the out-of-plane deformation of each of the side wall portions 2b and prevent the side walls 2b from falling in the out-of-plane direction. That is, since deformation of the cross section of the frame 1 can be suppressed more reliably than arranging one filling member for one side wall portion 2 b, the absorption characteristic of the collision energy of the frame 1 can be further improved. it can.
- the filling members 530a and 530b are disposed in intimate contact with the insides of the ridge portions 2d and 2e, respectively. Therefore, plastic deformation in each ridge line portion can be suppressed, and sectional deformation of the frame 1 can be further suppressed.
- the filling members 530 a and 530 b are provided on the frame 1, the overall weight of the frame 1 is increased. Therefore, it is preferable to determine whether the filling member is provided on the inner surface of one or both of the side wall portions 2b according to the collision safety performance and the weight required for the frame 1. Further, the thickness a 2 thick a 1 and 530b of the filling member 530a is appropriately set.
- the arrangement of the filling members shown in FIG. 24 can be similarly applied to the cross section of the frame 1 taken along the line IX-IX of the frame 1 shown in FIG.
- FIG. 25 is a cross-sectional view of the frame 1 for explaining a second arrangement example of the filling member according to the present embodiment.
- the cross-sectional view shown in FIG. 25 corresponds to the cross section of the frame 1 in VIII-VIII of the frame 1 shown in FIG.
- the filling members 531a and 531b according to the present arrangement example are disposed in close contact (preferably, adhered) to the central portions of the inner surfaces of the pair of side wall portions 2b.
- the out-of-plane deformation of the side wall 2b is suppressed, and the side wall 2b falls in the out-of-plane direction. Can be prevented locally. Therefore, the absorption characteristic of the collision energy of the frame 1 can be improved.
- the filling members 531a and 531b are disposed in close contact with the inner surfaces of the side wall portions 2b, but the filling members are disposed only on one of the inner surfaces of the side wall portions 2b. May be Whether the filling member is provided on the inner surface of one or both of the side walls 2b is preferably determined in accordance with the collision safety performance and weight required for the frame 1.
- the filling member thickness a 1 and 531b of the wall thickness a 2 of 531a, the distance from the top wall 3a of the filling member 531a on the side wall 2b b 1 and b 3, and the distance b 2 from the bottom wall portion 2a And b 4 can be set appropriately.
- the falling of the side wall portion 2b in the out-of-plane direction is caused by the plastic deformation of the ridge portion 2d (2e). Therefore, it is preferable that the filling member 5 disposed in close contact with the inner surface of the side wall portion 2b be disposed in close contact also with the inside of the ridge portion 2d (2e). Thereby, the suppression effect of the cross-sectional deformation of the flame
- the arrangement of the filling members shown in FIG. 25 can be similarly applied to the cross section of the frame 1 taken along the line IX-IX of the frame 1 shown in FIG.
- the filling member is arranged in close contact with the side wall 2b and the bottom wall 2a connected with the side wall 2b. Since the ridge 2d is restrained by the filling member, the deformation of the ridge 2d is suppressed. As a result, cross-sectional deformation of the frame 1 can be suppressed.
- FIG. 26 is a cross-sectional view of the frame 1 for explaining a third arrangement example of the filling member according to the present embodiment.
- the cross-sectional view shown in FIG. 26 corresponds to the cross section of the frame 1 in VIII-VIII of the frame 1 shown in FIG.
- the filling member 532 As shown in FIG. 26, the filling member 532 according to this arrangement example is arranged in close contact (preferably, adhesively) continuously with the inner surfaces of the pair of side wall portions 2b and the bottom wall portion 2a. At this time, since the bending portion 6A bends in a direction in which the bottom wall portion 2a is bent inward, the filling member 532 is disposed at the bending inner portion of the bending portion 6A. In the bottom wall portion 2a which is the bending inner side, the force in the compression direction is exerted by the bending of the frame 1 so that the out-of-plane deformation tends to occur. According to the arrangement shown in FIG.
- the filling member 532 since the filling member 532 is disposed in close contact with the inner surface of the bottom wall 2a, the filling member 532 can suppress the out-of-plane deformation of the bottom wall 2a. . Thereby, even if a high collision load acts on the frame 1, the cross-sectional collapse of the frame 1 can be suppressed. That is, not only the absorption characteristics of the collision energy of the frame 1 but also the load bearing performance of the frame 1 can be improved.
- the filling member 532 shown in FIG. 26 is disposed continuously in close contact with the pair of side wall portions 2b and the bottom wall portion 2a, but the present invention is not limited to this example.
- the filling members 532 may be separately and closely disposed on the inner surfaces of the pair of side wall portions 2 b and the bottom wall portion 2 a.
- the filling member 532 may be disposed in close contact with any one of the pair of side wall portions 2b and the bottom wall portion 2a. That is, the filling member 532 may be provided in an L-shape in a cross section orthogonal to the Y-axis direction.
- the filling member 532 is respectively provided on any of the pair of side wall portions 2b and the bottom wall portion 2a, not only the absorption characteristics of the collision energy of the frame 1 but also the load bearing performance of the frame 1 can be improved. it can.
- the arrangement position and filling amount of the filling member can be appropriately set according to the collision safety performance and weight required for the frame 1.
- the thicknesses a 1 , a 2 and a 3 of the filling member 532 shown in FIG. 26 may be set appropriately.
- the arrangement of the filling members shown in FIG. 26 can be similarly applied to the cross section of the frame 1 taken along the line IX-IX of the frame 1 shown in FIG.
- the filling member 532 is disposed continuously in close contact with the pair of side wall portions 2 b and the top wall portion 3 a.
- FIG. 27 is a cross-sectional view of the frame 1 for explaining a fourth arrangement example of the filling member according to the present embodiment.
- the cross-sectional view shown in FIG. 27 corresponds to the cross section of the frame 1 in VIII-VIII of the frame 1 shown in FIG.
- the filling members 533a and 533b according to this arrangement example are arranged in close contact (preferably, adhered) locally to the inside of each ridge line portion 2d.
- this arrangement it is possible to suppress the local plastic deformation occurring in the ridge portion 2 d.
- the side wall 2b in the out-of-plane direction. Therefore, it is possible to suppress the cross-sectional deformation of the frame 1 and to enhance the absorption characteristic of the collision energy of the frame 1.
- the filling members 533a and 533b are disposed in intimate contact with the inner side of the ridge portion 2d, the cross-sectional deformation of the frame 1 can be reduced with little increase in the weight of the frame 1. It can be suppressed.
- FIG. 28 is a cross-sectional view of the frame 1 for explaining a fifth arrangement example of the filling members according to the present embodiment.
- the cross-sectional view shown in FIG. 28 corresponds to the cross section of the frame 1 in VIII-VIII of the frame 1 shown in FIG.
- the filling member 533c according to this arrangement example is arranged in close contact locally on one inner side of the ridge portion 2d. Thereby, the local plastic deformation which arises in ridgeline part 2d in which filling member 533c is arranged can be controlled. Further, since the filling amount of the filling member can be reduced, the weight of the frame 1 can be increased.
- whether the filling member is provided inside one or both of the ridge portions 2 d is preferably determined according to the collision safety performance and weight required for the frame 1.
- the thickness a (a 1 , a 2 ) in the Z-axis direction and the thickness c (c 1 , c 2 ) in the X-axis direction of the filling members 533 a, 533 b, and 533 c are appropriately set.
- FIG. 29 is a cross-sectional view of the frame 1 for describing a modification of the fourth arrangement example and the fifth arrangement example of the filling members according to the present embodiment.
- the filling member 534 may be disposed in close contact with the inner surface of the bottom wall 2a as well as the inner side of the ridge line 2d.
- the absorption characteristic of the collision energy of the frame 1 can be made equal to or more than the arrangement example shown in FIG. 27 and FIG.
- the size of the thickness a of the filling member 534 is appropriately set according to the collision safety performance and the weight required for the frame 1.
- the arrangement of the filling members shown in FIGS. 27 to 29 can be similarly applied to the cross section of the frame 1 taken along the line IX-IX of the frame 1 shown in FIG.
- the filling members 533a, 533b, 533c and 534 are disposed in close contact with the inner side of the ridge portion 2e (the filling member 534 further, the inner surface of the top wall portion 3a).
- the fourth embodiment is a mode in which a resin material is disposed in a bending induction portion through a hole provided in a first metal plate that forms a metal member.
- the filling member 5 by disposing the filling member 5 in the bending induction portion provided in the frame 1, it is possible to improve the amount of energy absorption at the time of load input. However, when the frame 1 is bent and deformed, the frame 1 is easily deformed out of plane. Then, if the adhesion of the filling member 5 to the frame 1 is insufficient, the filling member 5 may be peeled off from the inner wall of the frame 1 depending on the degree of deformation of the frame 1.
- FIG. 131 is a partial cross-sectional view showing a configuration example of the frame 920 in which the filling member 925 is disposed.
- the filling member 925 is disposed in close contact with the inner wall surface 922A of the wall portion 922 of the frame 920.
- FIG. 132 when the wall portion 922 is to be deformed out of plane at the deformation position BP, if the adhesion of the filling member 925 filled and hardened is insufficient, the filling member is deformed by the deformation of the wall portion 922 There is a possibility that 925 may peel off the inner wall surface 922A. In this case, the effect of suppressing the deformation of the wall portion of the frame by the filling member is not sufficiently exhibited, and it becomes difficult to achieve the assumed collision performance.
- the filling member 5 can stably contribute to the collision safety performance.
- FIG. 30 is a partial cross-sectional view showing an exemplary configuration of a frame 100 according to a fourth embodiment of the present invention.
- the frame 100 includes the hollow member 110 and the filling member 50.
- the direction V (V1, V2) shown in FIGS. 30 to 37 indicates the outside of the hollow member 110.
- the hollow member 110 according to the present embodiment is an example of the above-described metal member.
- the hollow member 110 is a structural member having a longitudinally extending wall 20.
- the hollow member 110 has a so-called frame shape, and is constituted by a plurality of wall portions 20.
- the wall unit 20 according to the present embodiment is an example of the first metal plate described above.
- the hollow member 110 may have a hollow closed cross-sectional structure, or may have an open cross-sectional structure such as a U-shape.
- the shape of the cross section orthogonal to the longitudinal direction of the hollow member 110 is not particularly limited.
- the cross-sectional shape of the hollow member 110 may be a rectangular cross section or a circular cross section.
- At least one wall hole 21 is provided in the wall portion 20 of the hollow member 110.
- the method of processing the wall holes 21 and the number and shape of the wall holes 21 are not particularly limited.
- the wall hole 21 according to the present embodiment is an example of a hole.
- the filling member 50 is an example of the above-described resin material.
- the filling member 50 is made of urethane resin, epoxy resin or any other resin.
- the filling member 5 can be formed with a Young's modulus of at most about 300 MPa if it is a urethane resin and at most about 3000 MPa if it is an epoxy resin.
- the filling member 50 may be, for example, a hard foam filling member made of a foamed resin material.
- the foamed resin is cured by chemical change after being installed inside the hollow member 110.
- the Young's modulus of the filling member 50 is preferably 20 MPa or more.
- the Young's modulus of the filling member 50 can be changed according to the density of the resin forming the filling member 50. However, since the higher the density, the harder the molding, the Young's modulus of the filling member 50 is preferably 300 to 400 MPa at the maximum.
- the filling member 50 When the filling member 50 is installed inside the hollow member 110, the filling member 50 is disposed in close contact with the inner wall surface 20A of the wall portion 20.
- a portion of the filling member 50 in close contact with the inner wall surface 20A is referred to as a first filling portion 51.
- the first filling portion 51 is formed by introducing a foamed resin inside the hollow member 110. At this time, the first filling portion 51 is in close contact with the inner wall surface 20A at the contact surface 51a.
- the first filling portion 51 is an example of a first reinforcing portion.
- the filling member 50 is disposed so as to be in close contact with the outer wall surface 20B of the wall portion 20 through the wall hole 21 as well as the inside of the hollow member 110.
- a portion of the filling member 50 in close contact with the outer wall surface 20B is referred to as a second filling portion 52.
- the second filling portion 52 is formed by introducing a foamed resin into the inside of the hollow member 110 and bulging the foamed resin from the inside of the hollow member 110 through the wall hole 21 to the outside. .
- the second filling portion 52 is in close contact with the outer wall surface 20B at the contact surface 52a.
- the second filling portion 52 is an example of a second reinforcing portion.
- a portion of the filling member 50 provided in close contact with the wall hole 21 is referred to as a third filling portion 53. That is, the filling member 50 is integrally formed of the first filling portion 51, the second filling portion 52, and the third filling portion 53. The first filling portion 51 and the second filling portion 52 are connected via the third filling portion 53.
- the third filling portion 53 is an example of a third reinforcing portion.
- the filling member filled inside the hollow member 110 penetrates the wall hole 21 and leaks to the outside of the hollow member 110.
- the second filling portion 52 is provided in close contact with the wall portion 20 in the range of the distance p from the hole edge 22 of the wall hole 21 in the cross sectional view of the wall hole 21.
- the distance p is preferably, for example, 5 mm or more.
- the filling member 50 penetrates the wall holes 21 provided in the wall portion 20 of the hollow member 110 and adheres to both surfaces of the wall portion 20. Then, since the filling member 50 is mechanically hooked in the wall hole 21, the filling member 50 is locked to the wall portion 20. In this case, whether or not the filling member 50 falls off the wall portion 20 is determined not by the adhesive force to the wall portion 20 of the filling member 50 but by the tensile strength of the filling member 50. In general, since the tensile strength of the filling member 50 is significantly higher than the adhesive strength of the filling member 50, the filling member 50 is less likely to come off the wall 20.
- FIG. 31 is a partial cross-sectional view showing an example of the operation of the frame 100 according to the present embodiment.
- a collision load acts on the longitudinal direction of the hollow member 110.
- a buckling such that the hollow member 110 protrudes outward (direction V in the drawing) occurs at the deformation position BP near the wall hole 21 and the wall portion 20 is hollow.
- the action of bending inward of the member 110 is applied.
- “inward” means the direction opposite to the direction V in the drawing and means the direction of the center of gravity of the hollow member 110.
- the filling member 50 is locked to the wall portion 20 by the second filling portion 52 which penetrates the wall hole 21 and is connected to the first filling portion 51. Therefore, for example, even if the wall portion 20 bends inward of the hollow member 110, the first filling portion 51 follows the second filling portion 52, so the first filling portion 51 is restrained by the wall portion 20. State is maintained.
- the filling member 50 does not easily come off the wall portion 20 easily.
- the state in which the filling member 50 is in close contact with the wall portion 20 of the hollow member 110 can be maintained. Accordingly, since the first filling portion 51 of the filling member 50 restrains the deformation of the wall portion 20 in the out-of-plane direction, the out-of-plane deformation of the wall portion 20 can be suppressed. That is, the filling member 50 can stably contribute to the collision safety performance of the frame 100.
- the third filling portion 53 connecting the first filling portion 51 and the second filling portion 52 is preferably densely filled. The reason is that, by tightly packing them, the displacement of the filling member 50 in the direction perpendicular to the axis of the wall hole 21 is suppressed, which contributes to the prevention of the peeling of the filling member 50.
- the third filling portion 53 connecting the first filling portion 51 and the second filling portion 52 may not necessarily be densely filled in the wall hole 21.
- the third filling portion 53 may not be in intimate contact with the hole edge 22 of the wall hole 21.
- the inside of the filling member 50 may not necessarily be densely filled.
- FIG. 32 is a partial cross-sectional view showing a configuration example of a frame 100A according to a first modified example of the present embodiment.
- a plurality of wall holes 21 are provided in the wall portion 20 of the hollow member 110A constituting the frame 100A according to the present modification.
- the filling member 50 penetrates the wall holes 21 and is provided in close contact with the inner wall surface 20A and the outer wall surface 20B of the wall portion 20. That is, the filling member 50 includes the first filling portion 51 in close contact with the inner wall surface 20A of the wall portion 20 and the plurality of second filling portions in close contact with the outer wall surface 20B of the wall portion 20 at each position of the plurality of wall holes 21. 52 and a third filling portion 53 provided in close contact with each of the plurality of wall holes 21 and connecting the first filling portion 51 and the plurality of second filling portions 52.
- the portion for locking the filling member 50 to the wall portion 20 is increased according to the number of the wall holes 21 through which the filling member 50 passes. Thereby, the filling member 50 can be more firmly fixed to the wall portion 20.
- FIG. 33 is a partial cross-sectional view showing an example of the operation of the frame 100A according to the present modification.
- a collision load acts on the longitudinal direction of the hollow member 110A.
- a buckling that protrudes inward of the hollow member 110A (opposite to the direction V in the drawing) occurs at the deformation position BP near the wall hole 21 and the wall 20 tries to bend outward of the hollow member 110A.
- the wall portion 20 tends to bend outward of the hollow member 110, whereby the filling member 50 is made of the wall portion 20. It peels off from the inner wall surface 20A.
- the filling member 50 is locked to the plurality of wall holes 21 by each of the second filling portions 52 connected through the plurality of wall holes 21. Then, in the example shown in FIG. 33, even if the wall portion 20 is bent outward, the first filling portion 51 follows the second filling portion 52, so the first filling portion 51 is restrained by the wall portion 20. Is maintained.
- the filling member 50 can stably contribute to the collision safety performance of the frame 100A.
- FIG. 34 is a partial cross-sectional view showing a configuration example of a frame 100B according to a second modified example of the present embodiment.
- the first filling portion 51 of the filling member 50 according to the present modification is disposed inside the ridge line portion 23 of the wall portion 20 of the hollow member 110A.
- wall holes 21 are provided on both sides of the ridgeline portion 23 of the wall portion 20, respectively.
- the filling member 50 penetrates the wall holes 21 and is provided in close contact with the inner wall surface 20A and the outer wall surface 20B of the wall portion 20.
- the number of the wall holes 21 provided in the wall portion 20 is not particularly limited. It is desirable that the wall holes 21 be provided in each of the wall portions 20 sandwiching the ridge portion 23. Then, it is possible to suppress out-of-plane deformation of the hollow member 110B so that the corner of the ridge portion 23 opens.
- the number of places connecting the first filling portion 51 and the second filling portion 52 of the filling member 50 increases. Then, the first filling portion 51 and the second filling portion 52 are pulled by the deformation of the wall portion 20, but if the number of the third filling portions 53 which are the connecting portions is large, the load of the connecting portion per one is Distributed.
- the fixing force to the wall portion 20 of the filling member 50 can be increased.
- the rigidity of the hollow member 110 may be reduced. Therefore, the number of wall holes 21 and the installation position may be determined appropriately according to the design.
- FIG. 35 is a partial cross-sectional view showing a configuration example of a frame 100C according to a third modified example of the present embodiment.
- the hole edge 22A of the wall hole 21A is located more inward of the hollow member 110C than the wall portion 20.
- the wall portion 20 includes an inclined portion 24 which inclines inward of the hollow member 110C in the vicinity of the wall hole 21A.
- the filling member 50 is disposed in close contact with the inside and the outside of the wall portion 20 so as to bite into the inclined portion 24.
- the second filling portion 52 is provided in close contact with the inclined surface 24 ⁇ / b> A of the inclined portion 24 in the outer wall surface 20 ⁇ / b> B of the wall portion 20.
- the outer side surface 52b of the second filling portion 52 and the outer wall surface 20B of the wall portion 20 can be flush with each other. Then, even if the filling member 50 penetrates the wall hole 21A from the inside of the wall portion 20 and bulges outward, the bulging portion can be removed to make the outer wall surface 20B of the wall portion 20 flat. Therefore, interference with other members due to expansion of the filling member 50 does not occur. Therefore, the handling of the frame 100 is facilitated.
- the second filling portion 52 introduces, for example, a foamed resin to the inside of the hollow member 110C, and the foamed resin is a portion where the foamed resin expands from the inside of the hollow member 110C through the wall hole 21A to the outside.
- the wall hole 21A may be covered along the outer wall surface 20B before the foamed resin hardens, and the foamed resin protruding from the outer wall surface 20B may be pressed.
- the portion of the second filling portion 52 that bulges outward beyond the outer wall surface 20B of the wall portion 20 may not be cut off.
- the sloped portion 24 fixes the filling member 50 and the wall portion 20 like an anchor bolt. Function is exhibited. Therefore, the filling member 50 is firmly fixed to the wall portion 20.
- FIG. 36 is a partial cross-sectional view showing a configuration example of a frame 100D according to a fourth modified example of the present embodiment.
- the hole edge 22B of the wall hole 21B is positioned more inward of the hollow member 110D than the wall portion 20.
- the wall 20 is provided with a protrusion 25 from which the hole edge 22B protrudes from the outside of the wall 20 toward the inside. That is, the wall hole 21 is a burring hole.
- burring holes are formed by, for example, a known burring process.
- the filling member 50 is disposed in close contact with the inside and the outside of the wall portion 20 so as to bite into the protruding portion 25.
- the second filling portion 52 is provided in close contact with the outer surface 25 ⁇ / b> A of the projecting portion 25 among the outer wall surface 20 ⁇ / b> B of the wall portion 20.
- the outer side surface 52b of the second filling portion 52 and the outer wall surface 20B of the wall portion 20 can be flush with each other. That is, even if the filling member 50 penetrates the wall hole 21B from the inside of the wall portion 20 and bulges outward, the outer wall surface 20B of the wall portion 20 can be made flat. Then, the bulging of the filling member 50 will not cause interference with other members.
- the wall holes 21B may be covered along the outer wall surface 20B before the foamed resin hardens, and the foamed resin protruding from the outer wall surface 20B may be pressed. A portion of the second filling portion 52 that bulges outward beyond the outer wall surface 20B of the wall portion 20 may not be cut off unless there is a reason for cutting off such as interference with other members.
- the filling member 50 since the filling member 50 is in close contact with the projection 25 so as to cover the projection 25, the projection 25 fixes the filling member 50 and the wall 20 like an anchor bolt. Function is exhibited. Therefore, the filling member 50 is firmly fixed to the wall portion 20.
- FIG. 37 is a partial cross-sectional view showing a configuration example of a frame 100E according to a fifth modified example of the present embodiment.
- the wall portion 20 according to the present modification is provided with a recessed portion 26 recessed more inward than the wall portion 20 in the hollow member 110E.
- the wall hole 21C is provided inside the recess 26.
- the filling member 50 is disposed in close contact with the inside and the outside of the wall portion 20 so as to bite into the depression portion 26.
- the second filling portion 52 is provided in close contact with the outer surface 26 ⁇ / b> A of the recess portion 26 of the outer wall surface 20 ⁇ / b> B of the wall portion 20.
- the outer side surface 52b of the second filling portion 52 and the outer wall surface 20B of the wall portion 20 can be flush with each other as in the third and fourth modifications. That is, even if the filling member 50 penetrates the wall hole 21C from the inside of the wall portion 20 and bulges outward, the outer wall surface 20B of the wall portion 20 can be made flat. Then, the bulging of the filling member 50 will not cause interference with other members.
- the hollow portion 26 may be covered along the outer wall surface 20B before the foamed resin hardens, and the foamed resin protruding from the outer wall surface 20B may be pressed. A portion of the second filling portion 52 that bulges outward beyond the outer wall surface 20B of the wall portion 20 may not be cut off unless there is a reason for cutting off such as interference with other members.
- the recess 26 fixes the filling member 50 and the wall 20 like an anchor bolt. Function is exhibited. Therefore, the filling member 50 is firmly fixed to the wall portion 20.
- a recess may be provided in the wall 20
- a wall hole may be provided inside the recess, and the wall hole may be further subjected to burring.
- another part may be attached to the wall 20 instead of the recess 26.
- the requirements of another part are to provide the asperities or protrusions that engage the filling member 50, and to be fixedly disposed to the hollow member 110 around the wall hole of the wall 20 and inside the hollow member 110.
- a wall hole may be provided in the wall portion 20, and a nut may be disposed coaxially with the screw hole and the wall hole so as to be joined to the inside of the hollow member 110.
- the unevenness of the screw holes can be engaged with the filling member 50 to fix the filling member.
- the hexagonal shape of the nut can prevent the filling member 50 from rotating around the nut.
- FIG. 38 is a perspective view showing a schematic configuration of an example of a frame 1 according to a fourth embodiment of the present invention.
- a frame 1 according to the present embodiment includes a first structural member 2, a second structural member 3, an reinforcement 4, and a filling member 5.
- the hollow member 10 according to the present embodiment is formed of the first structural member 2 and the second structural member 3.
- the structure of the frame 1 shown in FIG. 38 is the first embodiment described with reference to FIGS. 2 to 4 except that the filling member 5 has the structure of the filling member 50 described in the first example. It is street. Specifically, as shown in FIG. 38, in the bending portion 6 which is the bending induction portion of the hollow member 10, the filling member 5 is disposed between the bottom wall portion 2a of the hollow member 10 and the reinforcement 4 There is. Furthermore, as shown in FIG. 38, in the vicinity of the bending portion 6, a wall hole 21 is provided in the bottom wall portion 2a, and the filling member 5 penetrates the wall hole 21 and is formed on the inner wall surface of the bottom wall portion 2a. A first filling portion 51 in close contact and a second filling portion 52 in close contact with the outer wall surface of the bottom wall portion 2a are provided.
- FIG. 39 is a cross-sectional view in a cross section orthogonal to the Z-axis direction of an example of the frame 1 according to the present embodiment.
- the cross sectional view shown in FIG. 39 corresponds to the cross section of the frame 1 taken along the line XII-XII of the hollow member 10 shown in FIG.
- the hollow member 10 is provided with bent portions 6A and 6B along the longitudinal direction.
- the bending portion 6A is provided so as to be bent in a direction in which the bottom wall portion 2a is bent inward.
- the bending portion 6B is provided so as to be bent in a direction in which the top wall portion 3a is bent inward.
- the filling member 5 is disposed in close contact with the major surface 4 a of the reinforcement 4.
- the filling member 5A is provided in close contact with the bottom wall portion 2a at the bending portion 6A.
- the filling member 5B is provided in close contact with the top wall portion 3a in the bending portion 6B.
- a wall hole 21 is provided in the bottom wall portion 2a, and a hole 41A is provided in the main surface portion 4a of the reinforcement 4.
- the filling member 5A penetrates the wall hole 21 and the hole 41A, and is provided in close contact with both surfaces of the bottom wall 2a and both surfaces of the main surface 4a.
- the filling member 5A is provided on the first filling portion 51A in close contact with the inner wall surface of the bottom wall portion 2a and the first surface 40a of the main surface portion 4a of the reinforcement 4 and the outer wall surface of the bottom wall portion 2a.
- the second filling portion 52A in close contact, the third filling portion 53A in close contact with the wall hole 21 and connecting the first filling portion 51A and the second filling portion 52A, and the second surface 40b of the main surface portion 4a It is comprised by the 4th filling part 54A which closely_contact
- a wall hole 31 is provided in the top wall portion 3a, and a hole 41B is provided in the main surface portion 4a of the reinforcement 4.
- the filling member 5B penetrates the wall holes 31 and the holes 41B, and is provided in close contact with both surfaces of the top wall 3a and both surfaces of the main surface 4a.
- the filling member 5B is formed on the first filling portion 51B in close contact with the inner wall surface of the ceiling wall 3a and the second surface 40b of the main surface 4a of the reinforcement 4 and the outer wall surface of the ceiling wall 3a.
- the second filling portion 52B in close contact, the third filling portion 53B in close contact with the wall hole 31 and connecting the first filling portion 51B and the second filling portion 52B, and the first surface 40a of the main surface portion 4a. It is comprised by the 4th filling part 54B which closely_contact
- 40 and 41 are cross-sectional views taken along line XIII-XIII and line XIV-XIV of frame 1 shown in FIG.
- the filling member 5A is disposed in close contact with the bottom wall 2a and the main surface 4a in a space 7A formed by the bottom wall 2a, the main surface 4a, and the pair of side walls 2b. It is done.
- the bottom wall portion 2a is provided with a wall hole 21 and the main surface portion 4a is provided with a hole 41A.
- the filling member 5A includes a first filling portion 51A in close contact with the wall surfaces of the space 7A, a second filling portion 52A in close contact with the outer wall surface of the bottom wall portion 2a, and a fourth surface 40b in close contact with the second surface 40b.
- the filling portion 54A is connected through the wall hole 21 and the hole 41A. Thereby, 5 A of filling members are latched by both the bottom wall part 2a and the main surface part 4a.
- the filling member 5A exerts the ability as a joint of the bottom wall 2a and the main surface 4a, it is possible to offset the force received by the deformation of the main surface 4a and the bottom wall 2a. As a result, not only the out-of-plane deformation of the main surface portion 4a is merely suppressed, but also the force itself causing the out-of-plane deformation can be reduced. Thus, the collision safety performance of the frame 1 can be further enhanced.
- the first filling portion 51A of the filling member 5A is disposed in close contact with the inside of the ridge portion 2d and the connecting portion 4c. Therefore, plastic deformation due to locally high stress applied to the ridge portion 2 d and the connection portion 4 c can be more reliably suppressed. Thus, the collision safety performance of the frame 1 can be further enhanced.
- the filling member 5B is formed of the top wall portion 3a and the main portion in the space 7B formed by the top wall portion 3a, the main surface portion 4a, and the pair of side wall portions 2b. It is disposed in close contact with the surface 4a.
- the arrangement of the filling member 5B is the same as the arrangement of the filling member 5A described above.
- the wall holes 21 and 31 are provided in the bottom wall 2a and the top wall 3a, but the present invention is not limited to this example.
- the wall hole 21 may be provided in the wall adjacent to the side wall 2b or the ridges 2d and 2e. Even in such a case, if the portion of the filling member 5 that bulges to the outside of the side wall portion 2b is provided in close contact with these outer wall surfaces, the filling member 5 is formed on each wall portion of the hollow member 10 It is possible to maintain close contact.
- the Young's modulus of the filling member 5 is higher, the effect of suppressing the plastic deformation described above by the filling member 5 is enhanced.
- the place where the cross-sectional deformation occurs that is, the place where the cross-sectional deformation is to be suppressed can be limited to the bending portion 6 or the periphery thereof.
- the place which should arrange the filling member 5 can also be limited in anticipation of the place which carries out cross-sectional deformation. That is, in the present embodiment, it is possible to reduce the weight increase associated with the increase in the Young's modulus of the filling member 5.
- the reinforcement 4 is provided inside the bending portion 6 which is a bending induction portion. Further, the filling member 5 is disposed in close contact with both surfaces of the hollow member 10 through the holes provided in the wall portion and the reinforcement 4 of the hollow member 10. Thereby, even when the collision load is input to the frame 1, the filling member 5 does not drop out of either of the hollow member 10 and the reinforcement 4, and can be kept in a state of being restrained by them. Then, out-of-plane deformation of the wall portion and reinforcement 4 of the hollow member 10 by the filling member 5 can be suppressed. Thereby, the filling member 5 can stably contribute to the collision safety performance of the frame 1.
- the filling member 5 may be disposed in close contact with only the reinforcement 4.
- the spaces 7A and 7B shown in FIGS. 40 and 41 are large, and the filling member 5 is in close contact with both the bottom wall 2a or the top wall 3a and the reinforcement 4 across the spaces 7A and 7B.
- the filling member 5 may be arranged in close contact with only the reinforcement 4.
- the reinforcement 4 is provided with a hole as shown in FIGS. 30 to 37, and the filling member 5 is disposed in close contact with both sides of the reinforcement 4 through the hole. Then, even when the collision load is input to the frame 1, the filling member 5 does not drop out of the reinforcement 4, and can maintain the state of being restrained by the reinforcement 4.
- the reinforcement 4 shown in FIG. 39 is formed of one member and is provided to face each of the bottom wall portion 2a and the top wall portion 3a in the bending portion 6, but the present invention is not limited thereto. It is not limited to.
- a plurality of reinforcements 4 may be provided to be opposed to the bottom wall 2a or the top wall 3a in the bending induction portion such as the bending portion 6 or the like.
- the reinforcement 4 may be provided entirely along the longitudinal direction of the hollow member 10. That is, the position and length of the reinforcement 4 in the longitudinal direction of the hollow member 10 are not particularly limited as long as the reinforcement 4 is provided inside the bending induction portion.
- Example of bending induction >> Next, an example of the bending inducing portion provided in the hollow member 10 will be described. Although the above-mentioned each embodiment explained bending part 6 which is a bending induction part, the present invention is not limited to this example.
- the bend inducer comprises at least one of two features.
- the first feature is that the total plastic moment of the cross section perpendicular to the axial direction of the hollow member 10 is reduced as compared with the surrounding.
- bending of the hollow member 10 is induced. More specifically, bending occurs in a portion where the total plastic moment is relatively small in the hollow member 10 in the longitudinal direction.
- the bending induced portion having this feature is called a total plastic moment changing portion.
- the different strength portion is a total plastic moment changing portion.
- the second feature is a feature in which a ridge line or a surface along the axial direction of the hollow member 10 changes in shape such as bending, disconnection or thickness change along the axial direction.
- the bend induction part provided with this feature is called a shape change part.
- the hole, the recess, the protrusion, and the thickness change portion provided in the surface of the hollow member 10 are shape change portions. .
- the bend inducer often comprises both the first and second features.
- the bending inducing portion is often a shape changing portion. This is because the shape change portion can guide the direction in which the hollow member 10 bends. In the longitudinal direction of the hollow member 10, in the cross section perpendicular to the longitudinal direction of the region corresponding to the bending induction portion, there is a shape change portion. When the hollow member 10 bends, the shape change portion buckles, so that the direction in which the hollow member 10 bends can be guided by the arrangement of the shape change portion. When the present invention is applied to a frame member of a car, the direction in which the hollow member 10 bends is determined in advance.
- the hollow member 10 is required to be free of occupants and important parts prior to the bending direction. Therefore, it is desirable that the bending induction portion have at least the feature of the shape changing portion.
- the bending induced portion has the feature of the total plastic moment changing portion, even a small shape changing portion in the same direction as the total plastic moment changing portion in the longitudinal direction of the hollow member 10 functions. For this reason, it is desirable that the bending induced portion has features of both the total plastic moment changing portion and the shape changing portion.
- FIG. 42 is a cross-sectional view of the frame 1 for explaining an example of the hole provided in the hollow member according to an embodiment.
- a hole 60 is provided in the bottom wall 2a.
- the total plastic moment of the hollow member 10 at the portion where the hole 60 is provided is greater than the total plastic moment of the hollow member 10 at the front and back (in the longitudinal direction of the hollow member 10) of the portion where the hole 60 is provided. Low.
- bending stiffness is low. Therefore, when the collision load F shown in FIG.
- the frame 1 is bent so that the hole 60 is bent inward at the portion where the hole 60 is provided. Therefore, the reinforcement 4 is provided at a position facing at least the bottom wall 2 a provided with the hole 60, and the filling member 5 is disposed in close contact with the reinforcement 4.
- out-of-plane deformation of the reinforcement 4 can be suppressed, and buckling of the reinforcement 4 can be suppressed.
- FIG. 43 is a cross-sectional view of a frame 1 for explaining a modification of the filling member provided to face the hole according to an embodiment.
- the filling member 5 may not be disposed in the space inside the hole 60. Thereby, it is possible to perform bending deformation of bottom wall 2a in hole 60 more certainly.
- bending deformation in the bending induction part can be performed more reliably by not arranging the filling member 5 in the space in the vicinity of the bending induction part. It becomes possible.
- FIGS. 42 and 43 as in the second example of the first and fourth embodiments, an example of the hole in the case where the frame 1 has the reinforcement 4 is shown.
- FIGS. 44 and 45 show an example of a hole when the frame 1 does not have the reinforcement 4.
- FIG. 44 is a cross-sectional view of frame 1 for explaining an example of a hole provided in a hollow member according to one embodiment.
- the frame 1 shown in FIG. 44 is the frame 1 according to the second embodiment.
- a hole 60 is provided in the bottom wall 2a.
- the total plastic moment of the hollow member 10 at the portion where the hole 60 is provided is greater than the total plastic moment of the hollow member 10 at the front and back (in the longitudinal direction of the hollow member 10) of the portion where the hole 60 is provided. Low.
- a part of the surface (bottom wall 2a) is broken at the hole 60, bending stiffness is low. Therefore, when the collision load F shown in FIG.
- the frame 1 is bent so that the hole 60 is bent inward at the portion where the hole 60 is provided. That is, in the longitudinal direction of the hollow member 10, the portion of the hollow member 10 in which the hole 60 is provided serves as a bending inducing portion provided in the hollow member 10. Therefore, the filling member 5 is disposed in close contact with the inner surface of the bottom wall 2a at least in the portion where the hole 60 is provided.
- FIG. 45 is a cross-sectional view of frame 1 for explaining an example of a hole provided in a hollow member according to one embodiment.
- the frame 1 shown in FIG. 45 is a frame 1 according to the third embodiment.
- a hole 60 is provided in the bottom wall 2a.
- the total plastic moment of the hollow member 10 at the portion where the hole 60 is provided is greater than the total plastic moment of the hollow member 10 at the front and back (in the longitudinal direction of the hollow member 10) of the portion where the hole 60 is provided. Low.
- a part of the surface (bottom wall 2a) is broken at the hole 60, bending stiffness is low. Therefore, when the collision load F shown in FIG.
- the frame 1 is bent so that the hole 60 is bent inward at the portion where the hole 60 is provided. That is, in the longitudinal direction of the hollow member 10, the portion of the hollow member 10 in which the hole 60 is provided serves as a bending inducing portion provided in the hollow member 10. Therefore, the filling member 5 is disposed in close contact with the inner surface of the side wall portion 2b at least in the portion where the hole 60 is provided. As a result, when bending occurs in the vicinity of the hole 60 due to the input of the collision load F, out-of-plane deformation of the frame 1 can be suppressed, and the collision energy absorption characteristics of the frame 1 can be maintained high.
- 46 to 49 are schematic views showing another example of the hole provided in the hollow member according to one embodiment.
- a circular hole 60a may be provided in the bottom wall 2a.
- a plurality of holes 60b may be provided in the bottom wall 2a.
- the plurality of holes 60b may be provided side by side in a direction transverse to the longitudinal direction of the hollow member 10A. In this case, when the collision load is input, the hollow member 10A is likely to be bent and deformed toward the bottom wall 2a as the hole 60b is the starting point of bending.
- a hole 60c extending in a direction transverse to the longitudinal direction of the hollow member 10A may be provided in the bottom wall 2a.
- the hollow member 10A is bent and deformed toward the bottom wall 2a as the hole 60c as a starting point of bending.
- the shape of the hole 60c is not limited to the rounded rectangle shown in FIG. 48, and may be any shape.
- the direction transverse to the longitudinal direction of the hollow member 10A described above is not limited to the direction orthogonal to the longitudinal direction of the hollow member 10A as shown in FIG. 46 to FIG.
- an angle between the longitudinal direction of the hollow member 10A and the transverse direction be 45 degrees or more and 90 degrees or less. Thereby, stable bending deformation can be induced.
- the part in which the hole part 60 is provided is not restricted to the bottom wall part 2a.
- the hole 60 may be provided in the side wall 2b or the top wall 3a.
- the hole 60 etc. is not provided in the part facing the part in which the hole 60 was provided.
- the top wall 3a is not provided with a portion that induces bending deformation of another hole 60. This is to induce bending deformation on the side where the hole 60 is provided when the collision load is input.
- the hole 60d may be provided in the ridge portion 2d.
- the total plastic moment of the portion of the hollow member 10A provided with the hole 60d in the longitudinal direction is significantly reduced, so that the bending deformation with the portion provided with the hole 60d as the starting point of bending is made more reliable. Can be induced.
- wall hole 21 described above in the fourth embodiment may also be taken as an example of the bending induction portion.
- FIG. 50 is a cross-sectional view of the frame 1 for explaining an example of the bead portion provided in the hollow member according to an embodiment.
- the bead part 61 is an example of the recessed part in one Embodiment.
- the bead portion 61 is provided on the bottom wall portion 2a.
- the total plastic moment of the hollow member 10 at the portion where the bead portion 61 is provided is greater than the total plastic moment of the hollow member 10 at the front and back (in the longitudinal direction of the hollow member 10) of the portion where the bead portion 61 is provided. Low.
- the recess is easily crushed and tends to be a starting point of bending. Therefore, when the collision load F shown in FIG. 50 is input to the hollow member 10, the frame 61 bends so that the bead portion 61 bends inward at the portion where the bead portion 61 is provided. Therefore, the reinforcement 4 is provided at a position facing at least the bottom wall 2 a provided with the bead 61, and the filling member 5 is disposed in close contact with the reinforcement 4. Thus, when bending occurs in the vicinity of the bead portion 61 due to the input of the collision load F, out-of-plane deformation of the reinforcement 4 can be suppressed, and buckling of the reinforcement 4 can be suppressed.
- FIG. 50 as in the second example of the first and fourth embodiments, an example of the recess when the frame 1 has the reinforcement 4 is shown.
- FIGS. 51 and 52 show an example of a hole when the frame 1 does not have the reinforcement 4.
- FIG. 51 is a cross-sectional view of the frame 1 for explaining an example of a bead portion provided in a hollow member according to an embodiment.
- the frame 1 shown in FIG. 51 is the frame 1 according to the second embodiment.
- the bead part 61 is an example of the recessed part in one Embodiment.
- the bead portion 61 is provided on the bottom wall portion 2a.
- the total plastic moment of the hollow member 10 at the portion where the bead portion 61 is provided is greater than the total plastic moment of the hollow member 10 at the front and back (in the longitudinal direction of the hollow member 10) of the portion where the bead portion 61 is provided. Low.
- the recess is easily crushed and tends to be a starting point of bending. Therefore, when the collision load F shown in FIG. 51 is input to the hollow member 10, the frame portion 1 is bent so that the bead portion 61 is bent inward at the portion where the bead portion 61 is provided. That is, in the longitudinal direction of the hollow member 10, the portion of the hollow member 10 provided with the bead portion 61 is a bending inducing portion provided in the hollow member 10. Therefore, the filling member 5 is disposed in close contact with the inner surface of the bottom wall portion 2a at least in the portion where the bead portion 61 is provided. Thus, when bending occurs in the vicinity of the bead portion 61 due to the input of the collision load F, out-of-plane deformation of the frame 1 can be suppressed, and the load bearing performance of the frame 1 can be maintained high.
- FIG. 52 is a cross-sectional view of the frame 1 for explaining an example of the bead portion provided in the hollow member according to an embodiment.
- the frame 1 shown in FIG. 52 is the frame 1 according to the third embodiment.
- the bead part 61 is an example of the recessed part in one Embodiment.
- a bead portion 61 is provided on the bottom wall portion 2a.
- the total plastic moment of the hollow member 10 at the portion where the bead portion 61 is provided is greater than the total plastic moment of the hollow member 10 at the front and back (in the longitudinal direction of the hollow member 10) of the portion where the bead portion 61 is provided. Low.
- the recess is easily crushed and tends to be a starting point of bending.
- the frame 61 bends so that the bead portion 61 bends inward at the portion where the bead portion 61 is provided. That is, in the longitudinal direction of the hollow member 10, the portion of the hollow member 10 provided with the bead portion 61 is a bending inducing portion provided in the hollow member 10. Therefore, the filling member 5 is disposed in close contact with the inner surface of the side wall portion 2 b at least in the portion where the bead portion 61 is provided. As a result, when bending occurs in the vicinity of the bead portion 61 due to the input of the collision load F, it is possible to suppress the out-of-plane deformation of the frame 1 and maintain the collision energy absorption characteristics of the frame 1 high.
- 53 to 56 are schematic views showing another example of the recess provided in the hollow member according to one embodiment.
- the term "recessed portion” means a recessed portion provided in the bottom wall portion 2a or the like of the hollow member 10B, such as an emboss or bead.
- a circular recess 61a may be provided in the bottom wall 2a.
- a plurality of recesses 61b may be provided in the bottom wall 2a.
- the plurality of recesses 61b may be provided side by side in a direction transverse to the longitudinal direction of the hollow member 10B. In this case, when the collision load is input, the hollow member 10B is easily bent and deformed toward the bottom wall portion 2a, with the plurality of concave portions 61b serving as the starting point of bending.
- a bead portion 61c extending in a direction transverse to the longitudinal direction of the hollow member 10B may be provided on the bottom wall portion 2a.
- the hollow member 10B is bent and deformed toward the bottom wall portion 2a as the bead portion 61c as a starting point of bending.
- the shape of the bead portion 61c is not limited to the rounded rectangle shown in FIG. 55, and may be any shape.
- the direction transverse to the longitudinal direction of the hollow member 10B described above is not limited to the direction orthogonal to the longitudinal direction of the hollow member 10B as shown in FIG.
- the angle between the longitudinal direction of the hollow member 10B and the transverse direction may be 45 degrees or more and 90 degrees or less.
- the part in which the recessed part 61 is provided is not restricted to the bottom wall part 2a.
- the recess 61 may be provided in the side wall 2 b or the top wall 3 a.
- etc. Is not provided in the part which opposes the part in which the recessed part 61 was provided.
- the concave portion 61 is provided in the bottom wall portion 2a
- the top wall portion 3a is not provided with a portion that induces bending deformation of another concave portion 61. This is to induce bending deformation on the side on which the recess 61 is provided when the collision load is input.
- the recessed part 61d may be provided in the ridgeline part 2d.
- the total plastic moment of the portion provided with the recess 61d in the longitudinal direction of the hollow member 10B changes significantly, so that the bending deformation with the portion provided with the recess 61d as the starting point of bending is more surely induced. be able to.
- the recessed part 61 has a form shown below.
- the depth D d of the recess 61 (the surface 611 of the portion provided with the recess 61 and the recess 61 as shown in FIG.
- the length in the direction perpendicular to the plane between the bottom 612 and the bottom is preferably at least three times the thickness of the hollow member 10B.
- the distance L d of the edge 613 between the recesses 61 in the longitudinal direction of the hollow member 10B is preferably 50mm or less.
- FIG. 58 is a schematic view showing another example of the recess provided in the hollow member according to an embodiment.
- recesses 61e and 61f extending in the longitudinal direction of the hollow member 10B are provided side by side along the longitudinal direction of the hollow member 10B.
- bending occurs in a portion 610 between the recess 61e and the recess 61f in the longitudinal direction. This is because the ridge line is disconnected at a portion 610 between the recess 61 e and the recess 61 f in the longitudinal direction.
- a portion 610 between the recess 61 e and the recess 61 f in the longitudinal direction is a shape change portion.
- the hollow member 10B is made of a high strength steel sheet, from the viewpoint of moldability, the recess 61e, the depth D d of 61f, the plate thickness of the hollow member 10B is three times or more Is preferred.
- a concave portion, a convex portion to be described later, a thin portion, a different strength portion, or the like may be formed.
- the recesses 61e and the recesses 61f may not necessarily be arranged in series as shown in FIG.
- the recess 61e and the recess 61f may not necessarily extend in the longitudinal direction of the hollow member 10B.
- the angle between the longitudinal direction of the hollow member 10B and the extending direction of the recess 61e and the recess 61f may be 0 degree or more and 45 degrees or less.
- FIG. 59 is a cross-sectional view of the frame 1 for explaining an example of the convex portion provided in the hollow member according to an embodiment.
- a convex portion 62 is provided on the bottom wall portion 2a.
- the portion provided with the convex portion 62 is a shape change portion.
- the reinforcement 4 is provided at a position facing at least the convex portion 62 and the regions 8 a and 8 b before and after the convex portion 62, and the filling member 5 is disposed in close contact with the reinforcement 4.
- FIG. 59 as in the second example of the first and fourth embodiments, an example of the convex portion in the case where the frame 1 has the reinforcement 4 is shown.
- FIGS. 60 and 61 show an example of a hole when the frame 1 does not have the reinforcement 4.
- FIG. 60 is a cross-sectional view of the frame 1 for explaining an example of the convex portion provided in the hollow member according to an embodiment.
- the frame 1 shown in FIG. 60 is a frame 1 according to the second embodiment.
- a convex portion 62 is provided on the bottom wall portion 2a.
- the portion provided with the convex portion 62 is a shape change portion.
- a portion including the convex portion 62 and the front and rear edges 8a and 8b of the hollow member 10 is a bending inducing portion provided in the hollow member 10. Therefore, the filling member 5 is disposed in intimate contact with the inner surface of the bottom wall portion 2a in the portion where at least the convex portion 62 and the front and rear edges 8a and 8b are provided.
- FIG. 61 is a cross-sectional view of the frame 1 for explaining an example of the convex portion provided in the hollow member according to an embodiment.
- the frame 1 shown in FIG. 61 is the frame 1 according to the third embodiment.
- a convex portion 62 is provided on the bottom wall portion 2a.
- the portion provided with the convex portion 62 is a shape change portion.
- a portion including the convex portion 62 and the front and rear edges 8a and 8b of the hollow member 10 is a bending inducing portion provided in the hollow member 10. Therefore, the filling member 5 is disposed in intimate contact with the inner surface of the side wall portion 2b in the portion where at least the convex portion 62 and the front and rear edges 8a and 8b are provided.
- the filling member 5 is disposed in intimate contact with the inner surface of the side wall portion 2b in the portion where at least the convex portion 62 and the front and rear edges 8a and 8b are provided.
- 62 to 65 are schematic views showing another example of the convex portion provided in the hollow member according to one embodiment.
- the convex portion referred to here is realized by, for example, processing of the hollow member 10 or the like. That is, such a convex portion may be provided by deforming a part of the steel plate constituting the hollow member 10C. As shown in FIG. 62, a circular convex portion 62a may be provided on the bottom wall portion 2a.
- a plurality of convex portions 62b may be provided on the bottom wall portion 2a.
- the plurality of convex portions 62b may be provided side by side in a direction transverse to the longitudinal direction of the hollow member 10C.
- the hollow member 10C is easily bent and deformed toward the bottom wall portion 2a as one of the regions before and after the plurality of convex portions 62b in the longitudinal direction of the hollow member 10C. .
- a convex portion 62c extending in a direction transverse to the longitudinal direction of the hollow member 10C may be provided on the bottom wall portion 2a.
- the hollow member 10C is bent and deformed toward the bottom wall portion 2a as one of the regions before and after the convex portion 62c in the longitudinal direction of the hollow member 10C.
- the shape of the convex part 62c is not limited to the rounded rectangle shown in FIG. 64, Any shape may be sufficient.
- the direction transverse to the longitudinal direction of the hollow member 10C described above is not limited to the direction orthogonal to the longitudinal direction of the hollow member 10C as shown in FIG.
- the angle between the longitudinal direction of the hollow member 10C and the transverse direction may be 45 degrees or more and 90 degrees or less.
- the part in which the convex part 62 is provided is not restricted to the bottom wall part 2a.
- the convex portion 62 may be provided on the side wall portion 2 b or the top wall portion 3 a.
- etc. Is not provided in the part which opposes the part in which convex part 62 was provided.
- the top wall portion 3a is not provided with a portion that induces bending deformation, such as another convex portion 62 or the like. This is to induce bending deformation on the side on which the convex portion 62 is provided when the collision load is input.
- a convex portion 62d may be provided on the ridge line portion 2d.
- ridgelines are disconnected at the portion of the hollow member 10C where the convex portion 62d is provided in the longitudinal direction, it is possible to more reliably induce bending deformation with the portion where the convex portion 62d is provided as a starting point of bending. it can.
- the convex part 62 has a form shown below.
- the height H d of the convex portion 62 (the surface 621 of the portion provided with the convex portion 62 and the convex portion 62 is convex as shown in FIG.
- the length in the direction perpendicular to the plane between the apex 622 of the portion 62 (see FIG. 66) is preferably at least three times the thickness of the hollow member 10C.
- the distance L d between the edge 623 of the convex portion 62 in the longitudinal direction of the hollow member 10C is preferably 50mm or less.
- FIG. 67 is a schematic view showing another example of the convex portion provided in the hollow member according to one embodiment.
- convex portions 62e and 62f extending in the longitudinal direction of the hollow member 10C are provided side by side along the longitudinal direction of the hollow member 10C.
- ridge lines are present along the longitudinal direction at the edges of the convex portions.
- bending occurs in a portion 620 between the convex portion 62e and the convex portion 62f in the longitudinal direction. This is because the ridge line is disconnected at a portion 620 between the convex portion 62e and the convex portion 62f in the longitudinal direction.
- a portion 620 between the convex portion 62e and the convex portion 62f in the longitudinal direction is a shape change portion.
- the height (Hd) of the protrusions 62e and 62f is at least three times the thickness of the hollow member 10C from the viewpoint of formability. Is preferred.
- the concave portion, the convex portion, or a thin portion or a different strength portion described later may be formed.
- the convex portions 62e and the convex portions 62f do not necessarily have to be arranged in series as shown in FIG. Further, the protrusions 62e and the protrusions 62f may not necessarily extend in the longitudinal direction of the hollow member 10C.
- the angle between the longitudinal direction of the hollow member 10C and the extending direction of the convex portion 62e and the convex portion 62f is 0 degree or more and 45 degrees or less on the surface of the portion where the convex portion 62e and the convex portion 62f are provided. Just do it.
- FIG. 68 is a schematic view showing an example of a thickness change portion provided in the hollow member according to an embodiment.
- the plate thickness change portion herein means a portion where the plate thickness changes in the longitudinal direction of the hollow member 10D.
- the hollow member 10D includes a first thick portion 111 and a second thick portion 112.
- the first plate thick portion 111 is provided on the end side of the hollow member 10D, and the second plate thick portion 112 is provided continuously with the first plate thick portion 111 along the longitudinal direction of the hollow member 10D.
- the thickness of the steel plate differs between the first thickness part 111 and the second thickness part 112.
- the plate thickness of the second plate thick portion 112 is larger than the plate thickness of the first plate thick portion 111 from the viewpoint of securing the bending rigidity of the entire hollow member 10D. .
- the portion at the boundary between the first plate thick portion 111 and the second plate thick portion 112 is the plate thickness change portion 113.
- the total plastic moment in the longitudinal direction of the hollow member 10D changes in the thickness change portion 113.
- the thickness change portion 113 is also a shape change portion. That is, the thickness change portion 113 corresponds to the bending induction portion. Therefore, when the collision load is input to the hollow member 10D, the frame 1 bends at the thickness change portion 113. Therefore, the filling member 5 is disposed in close contact with at least the bottom wall portion 2a provided with the thickness change portion 113 or the side wall portion 2b in the portion provided with the thickness change portion 113.
- the reinforcement 4 is provided at a position facing at least the bottom wall 2 a provided with the thickness change portion 113, and the filling member 5 is in close contact with the reinforcement 4. It is desirable to be arranged. As a result, when bending occurs in the vicinity of the thickness change portion 113 due to the input of the collision load F, out-of-plane deformation of the reinforcement 4 can be suppressed, and buckling of the reinforcement 4 can be suppressed.
- FIG. 69 is a schematic view showing an example of a thin portion provided in the hollow member according to an embodiment.
- the bottom wall portion 2a is provided with a thin-walled portion 114 relatively thinner than the other portions before and after the hollow member 10D in the longitudinal direction.
- the total plastic moment of the hollow member 10 in the portion including the thin portion 114 is lower than the total plastic moment of the hollow member 10D in the front and rear (in the longitudinal direction of the hollow member 10D) of the portion where the thin portion 114 is provided.
- the thin portion 114 has features of both a total plastic moment change portion and a shape change portion.
- the portion of the hollow member 10D provided with the thin portion 114 corresponds to the bending induction portion. Therefore, when the collision load is input to the hollow member 10D, the frame 1 is bent so that the thin portion bends inward at the portion where the thin portion is provided.
- the hollow member 10D having such a thickness change portion may be formed of a work plate made of, for example, a cutting, a press, and a tailored blank.
- a work plate may be a Tailor Welded Blank (TWB) having a weld line.
- the plate to be processed may be a Tailor Rolled Blank (TRB) provided with different plate thicknesses depending on rolling rolls.
- TWB the difference thickness at the thickness change portion can be 0.2 mm or more.
- the board thickness change amount in the board thickness change part per member longitudinal direction it is possible for the board thickness change amount in the board thickness change part per member longitudinal direction to be 0.1 mm / 100 mm or more.
- the different strength portion and the strength change portion have the features of the total plastic moment change portion.
- the different strength portion is a portion where the yield strength of the hollow member 10 changes in the longitudinal direction of the hollow member 10. For example, at a portion where the yield strength changes in the longitudinal direction of the hollow member 10, there is a portion where the total plastic moment is smaller than the surrounding. That is, the different strength portion is a total plastic moment changing portion. Therefore, plastic deformation of the hollow member 10 is induced at the relevant point.
- the strength change portion is a boundary portion where the yield strength of the hollow member 10 changes in the longitudinal direction of the hollow member 10. That is, the strength change portion is a total plastic moment change portion.
- FIG. 70 is a cross-sectional view of the frame 1 for explaining an example of the different strength portion provided in the hollow member according to an embodiment.
- the different strength portion 63 is provided on the bottom wall portion 2a.
- the different strength portion 63 is provided, for example, by partially performing heat treatment such as welding, quenching or tempering on the hollow member 10.
- the yield strength of the hollow member 10 at the portion where the different strength portion 63 is provided is the yield strength of the hollow member 10 at the front and back (in the longitudinal direction of the hollow member 10) of the portion where the different strength portion 63 is provided It is different. Therefore, when the collision load F shown in FIG.
- the different strength portion 63 is bent so as to be bent inside.
- the bending is a bending caused by plastic deformation of the different strength portion 63 or a region in the vicinity of the different strength portion 63. Therefore, the reinforcement 4 is provided at a position facing at least the different strength portion 63 or a region near the different strength portion 63, and the filling member 5 is disposed in close contact with the reinforcement 4.
- FIG. 70 as in the second example of the first and fourth embodiments, an example of the different strength portion in the case where the frame 1 has the reinforcement 4 is shown.
- FIGS. 71 and 72 show an example of a hole when the frame 1 does not have the reinforcement 4.
- FIG. 71 is a cross-sectional view of the frame 1 for explaining an example of the different strength portion provided in the hollow member according to one embodiment.
- the frame 1 shown in FIG. 71 is the frame 1 according to the second embodiment.
- the different strength portion 63 is provided on the bottom wall portion 2a.
- the different strength portion 63 is provided, for example, by partially performing heat treatment such as welding, quenching or tempering on the hollow member 10.
- the yield strength of the hollow member 10 at the portion where the different strength portion 63 is provided is the yield strength of the hollow member 10 at the front and back (in the longitudinal direction of the hollow member 10) of the portion where the different strength portion 63 is provided It is different. Therefore, when the collision load F shown in FIG.
- the different strength portion 63 is bent so as to be bent inside. That is, in the longitudinal direction of the hollow member 10, a portion including the different strength portion 63 in the hollow member 10 becomes a bending induction portion provided in the hollow member 10.
- the bending is a bending caused by plastic deformation of the different strength portion 63 or a region in the vicinity of the different strength portion 63. Therefore, the filling member 5 is disposed in close contact with the inner surface of the bottom wall portion 2 a in a portion including at least the vicinity of the different strength portion 63.
- FIG. 72 is a cross-sectional view of the frame 1 for explaining an example of the different strength portion provided in the hollow member according to one embodiment.
- the frame 1 shown in FIG. 72 is a frame 1 according to the third embodiment.
- the different strength portion 63 is provided on the bottom wall portion 2a.
- the different strength portion 63 is provided, for example, by partially performing heat treatment such as welding, quenching or tempering on the hollow member 10.
- the yield strength of the hollow member 10 at the portion where the different strength portion 63 is provided is the yield strength of the hollow member 10 at the front and back (in the longitudinal direction of the hollow member 10) of the portion where the different strength portion 63 is provided It is different. Therefore, when the collision load F shown in FIG.
- the different strength portion 63 is bent so as to be bent inside. That is, in the longitudinal direction of the hollow member 10, a portion including the different strength portion 63 in the hollow member 10 becomes a bending induction portion provided in the hollow member 10.
- the bending is a bending caused by plastic deformation of the different strength portion 63 or a region in the vicinity of the different strength portion 63. Therefore, the filling member 5 is disposed in close contact with the inner surface of the side wall portion 2 b in a portion including at least the vicinity of the different strength portion 63.
- 73 and 74 are schematic views showing another example of the different strength portion provided in the hollow member according to the embodiment.
- the different strength portion here is realized by welding, heat treatment or the like on a work plate forming the hollow member 10E.
- the different strength portion 120 is provided along the circumferential direction in cross section with respect to the longitudinal direction of the hollow member 10E. Also in this case, the portion provided with the different strength portion 120 in the hollow member 10E corresponds to the bending induction portion. Therefore, when a collision load is input to the hollow member 10E, the frame 1 bends so that the different strength portion 120 bends inward at the portion where the different strength portion 120 is provided.
- the different strength portion may be partially provided on at least one of the wall portions constituting the cross section of the hollow member 10E, such as the bottom wall portion 2a. Also in this case, when the collision load is input to the hollow member 10E, the frame 1 bends so that the different strength portion 121 is bent inward at the portion where the different strength portion 121 is provided.
- the bending induction portion may be realized by, for example, a strength changing portion.
- FIG. 75 is a schematic view showing an example of the strength change portion provided in the hollow member according to an embodiment.
- the hollow member 10E includes the first strength portion 122 and the second strength portion 123.
- the first strength portion 122 is provided on the end side of the hollow member 10E, and the second strength portion 123 is provided continuously with the first strength portion 122 along the longitudinal direction of the hollow member 10E.
- the yield strength of the steel plate is different between the first strength portion 122 and the second strength portion 123.
- the magnitude relationship of the yield strength is not particularly limited, it is preferable that the yield strength of the second strength portion 123 be larger than the yield strength of the first strength portion 122 from the viewpoint of securing the bending rigidity as the entire hollow member 10E.
- a portion at the boundary between the first strength portion 122 and the second strength portion 123 is the strength change portion 124.
- the yield strength in the longitudinal direction of the hollow member 10E changes in the strength change portion 124. That is, the strength change portion 124 corresponds to the bending induction portion. Therefore, when a collision load is input to the hollow member 10E, the frame 1 bends at the strength change portion 124.
- FIG. 76 is a cross-sectional view of the frame 1 for explaining an example of the combination of the bending portion and the hole portion provided in the hollow member according to an embodiment.
- the hollow member 10 is provided with a bent portion 6A, and a hole portion 64 is provided in the bent inner portion 6Aa of the bottom wall portion 2a.
- the reinforcement 4 is provided at a position facing at least the bending inner portion 6Aa and the hole 64, and the filling member 5 is disposed in close contact with the reinforcement 4.
- the hollow member 10 can be more reliably bent at the bending portion 6A by the input of the collision load F.
- FIG. 76 as in the second example of the first and fourth embodiments, an example of the different strength portion in the case where the frame 1 has the reinforcement 4 is shown.
- FIGS. 77 and 78 show an example of a hole when the frame 1 does not have the reinforcement 4.
- FIG. 77 and FIG. 78 are cross-sectional views of the frame 1 for explaining an example of the combination of the bending portion and the hole portion provided in the hollow member according to one embodiment.
- the frame 1 shown in FIG. 77 is the frame 1 according to the second embodiment.
- the frame 1 shown in FIG. 78 is a frame 1 according to the third embodiment.
- the hollow member 10 is provided with a bending portion 6A, and the bending inner portion of the bottom wall portion 2a is provided with a hole 64.
- the filling member 5 is disposed in close contact with the inner surface of the bottom wall 2a or the side wall 2b of the bent portion 6A.
- the hollow member 10 can be bent more reliably at the bending portion 6 by the input of the collision load F.
- the combination of the bending induction parts is not limited to the example shown in FIG. 76, and bending of the hollow member 10 in the bending induction part can be more reliably generated by combining a plurality of the examples of the bending induction parts shown above.
- the bending inducing portion may be realized by a combination of at least two or more of the bent portion, the concave portion, the convex portion, the hole portion, the plate thickness changing portion, the thin portion, the different strength portion, and the strength changing portion.
- the combination of the shape change portion and the total plastic moment change portion of the bending induction portion is useful for causing the small shape change portion to function and bending the hollow member 10 in a desired direction.
- the installation position of the reinforcement 4 shown in FIG. 42, FIG. 43, FIG. 50, FIG. 59, FIG. 70, and FIG. 76 is only inside the bending induction portion, but the present invention is not limited to this example.
- the length in the longitudinal direction and the installation position of the reinforcement 4 are not particularly limited as long as they are provided at least inside the bending induction portion.
- the size, material, and installation position of the reinforcement 4 are appropriately adjusted in accordance with the collision safety performance, the weight, and the like required for the frame 1.
- the bending induced portion provided in the hollow member 10 is treated as the main bending induced portion. Also, if the hollow member 10 is not provided with a bending induction portion, and there are a recess, a projection, a hole, a plate thickness changing portion, a thin portion, a different strength portion and a strength changing portion in the reinforcement 4, these are bending induction It is considered as a department.
- a locus of the center of gravity along the longitudinal direction formed by the center of gravity of the cross section of the hollow member 10 and the reinforcement 4 that is, the cross section of the frame 1 excluding the filling member 5.
- a portion having a radius of curvature of 260 mm or less is regarded as a bending portion to be a bending induction portion.
- FIG. 79 is a cross-sectional view of the frame 1 showing a configuration example in which the reinforcements 4 are juxtaposedly spaced in the longitudinal direction inside the hollow member 10 according to an embodiment.
- the filling member 5 is arranged at the position of the end of the reinforcement 4 in the longitudinal direction of the members, deformation of the members will occur. Can be relaxed.
- a portion where the total plastic moment of the frame 1 except the filling member 5 changes in the longitudinal direction is regarded as a bending induced portion.
- the bending induction portion is a shape changing portion
- the shape changing portion is a bending inducing portion in the cross section.
- the direction from the center of gravity toward the center of curvature of the locus of the center of gravity along the longitudinal direction is the direction in which the hollow member 10 bends.
- a portion that intersects with a line connecting the center of gravity and the center of curvature of the locus of the center of gravity is regarded as a bending inducing portion in the cross section.
- FIG. 80 is a cross-sectional view showing a cross section orthogonal to the longitudinal direction of a first example of the hollow member 10 according to another embodiment of the present invention.
- the closed cross section of the hollow member 10 has a substantially hexagonal shape symmetrical with respect to the X axis.
- four apexes 2 d, 2 d, 2 f and 2 f exist in a portion substantially orthogonal to the X-axis direction of the first structural member 2.
- the vertex 2d is defined as the ridge line portion 2d. That is, the portion sandwiched between the pair of ridges 2d including the apexes 2f, 2f is defined as the bottom wall 2a.
- FIG. 81 is a cross-sectional view showing a cross section orthogonal to the longitudinal direction of a second example of the hollow member 10 according to another embodiment of the present invention.
- the first structural member 2 and the second structural member 30 have a hat-shaped cross-sectional shape. That is, the hollow member 10 is formed of two structural members having a hat-shaped cross-sectional shape.
- the side wall portion 2b of the first structural member 2 and the side wall portion 30b of the second structural member 30 are interposed between the ridge portion 2e of the first structural member 2 and the ridge portion 30e of the second structural member 30.
- It is defined as one continuous side wall (continuous side wall). That is, the closed cross section of the hollow member 10 is formed by the bottom wall 2 a, the pair of continuous side walls, and the bottom wall 30 a (corresponding to the top wall).
- the shapes of the hollow member 10 and the closed cross section of the hollow member 10 are not limited to the examples shown in FIGS. 3, 80 and 81. If the shape of the closed cross section of the hollow member 10 is substantially polygonal, and the portions corresponding to the bottom wall, the pair of side walls and the top wall forming the closed cross can be defined, the technique according to the present invention is a hollow member Applicable to 10.
- the hollow member may be a hollow member having a closed cross section obtained by overlapping two structural members having a U-shaped cross-sectional shape such that the opening portions face each other.
- the hollow member may be a hollow member formed by performing hydroforming or bending on a circular pipe.
- FIG. 82 is a cross-sectional view showing a cross section orthogonal to the longitudinal direction of a third example of the hollow member 10 according to another embodiment of the present invention.
- the hollow member 10 is formed by the third structural member 9 having a circular cross-sectional shape.
- the hollow member 10 is a circular pipe extending in the longitudinal direction.
- the third structural member 9 is an example of a first metal plate.
- the third structural member 9 is formed of, for example, a metal plate such as a steel plate.
- the strength of the third structural member 9 is not particularly limited. However, in order to compensate for the overall strength of the frame that can be reduced by weight reduction, the tensile strength of the third structural member 9 is preferably 780 MPa or more. The tensile strength of the third structural member 9 is more preferably 980 MPa or more.
- FIG. 82 shows an example in which the hollow member 10 is formed of one structural member
- the hollow member 10 may be formed by bonding two or more structural members to each other.
- the cross-sectional shape of the hollow member 10 may be a perfect circle or an ellipse.
- the filling member 5 is an example of a resin material, and is disposed at a position corresponding to the bending induction portion of the frame 1. Below, the specific example of the arrangement
- the longitudinal direction (Y-axis direction) of the frame 1 is referred to as “longitudinal direction Y”
- the height direction of the frame 1 (X-axis direction) is referred to as “height direction X”.
- the width direction (Z-axis direction) may be referred to as "width direction Z”.
- FIG. 83 shows a specific example of the bending inducing portion (bending portion) provided in the frame 1 and the filling member 5.
- the bottom wall 2a of the frame 1 is provided with a curved bending portion 6a as a bending inducing portion.
- the bent portion 6a is a region where the bottom wall portion 2a of the frame 1 is curved in a curved shape along the longitudinal direction Y, and bending deformation of the frame 1 is induced at the position of the bent portion 6a.
- the filling member 5 is provided inside the bent portion 6 a of the frame 1 in close contact with the inner surface of the bottom wall portion 2 a.
- the filling member 5 is disposed so as to cover the whole of the bending portion 6 a in the longitudinal direction Y and the bottom wall portion 2 a of the peripheral portion thereof, and both ends 5 E1 and 5 E2 of the filling member 5 in the longitudinal direction Y are It extends to the outside of the longitudinal direction Y more than both end portions 6a E1 and 6a E2 of the longitudinal direction Y of the bending portion 6a.
- the length in the longitudinal direction Y of the extended portion of the filling member 5 is referred to as extending length L P. As shown in FIG.
- extending length L P of one side is, between the one end 5 E1 in the longitudinal direction Y of the filling member 5, and one end 6a E1 in the longitudinal direction Y of the bent portion 6a Corresponds to the distance of Similarly, the extending length L P of the other side, the other side end portion 5 E2 in the longitudinal direction Y of the filling member 5, the distance between the other side end portion 6a E2 Noto longitudinal direction Y of the bent portion 6a Equivalent to.
- the extension lengths L P and L P on both sides are the same, any one extension length L P may be longer than the other extension length L P.
- the filling member 5 is less than one-half of the section height H of the frame 1 (the hollow member 10)
- the filling member 5, the bent portion 6a bending induction part It is preferable to arrange so that the bottom wall part 2a of the whole and its periphery may be covered. That is, it is preferable that L P ⁇ H / 2.
- the amount of energy absorbed by the bending portion 6 a (bending induction portion) and the filling member 5 can be improved with high mass efficiency.
- the energy absorption characteristic is low in the portion of the frame 1 which is separated from the bending portion 6a (the bending induction portion), by setting L P ⁇ H / 2 as described above, the filling member 5 is filled in the separated portion. Since it is not necessary to dispose wastefully, it is possible to suppress an unnecessary increase in weight of the frame 1 accompanying the placement of the filling member 5.
- FIG. 84 shows another specific example of the bending inducing portion (bending portion) provided in the frame 1 and the filling member 5.
- a rectangular bending portion 6b is provided on the bottom wall 2a of the frame 1 as a bending inducing portion.
- the bent portion 6 b is a portion where the frame 1 is bent in a square at a predetermined position.
- Bottom wall portions 2a on both sides in the longitudinal direction Y of the bending portion 6b are planar, and ridge portions where these planar bottom wall portions 2a intersect at an angle form the bending portion 6b. Bending deformation of the frame 1 is induced at the bending position of the bending portion 6b.
- the filling member 5 is provided inside the bent portion 6b of the frame 1 in close contact with the inner surface of the bottom wall portion 2a.
- the filling member 5 is disposed so as to cover the whole of the bending portion 6b and the bottom wall portion 2a of the peripheral portion thereof, and both end portions 5E1 and 5E2 of the filling member 5 in the longitudinal direction Y are respectively from the bending portion 6b Extension lengths L P and L P extend on both sides in the longitudinal direction Y.
- extending length L P of one side has a longitudinal direction Y of the one side end portion 5 E1 of the filling member 5 corresponds to the distance between the bent portions 6b.
- the extending length L P of the other side, the other side end portion 5 E2 in the longitudinal direction Y of the filling member 5 corresponds to the distance between the bent portions 6b.
- the extension lengths L P and L P on both sides are the same, any one extension length L P may be longer than the other extension length L P.
- FIG. 85 is a cross-sectional view showing an example of the hollow member 10, and shows a cross section orthogonal to the longitudinal direction X of the hollow member 10.
- the hollow member 10 is composed of a first structural member 2 having a hat-shaped cross-sectional shape and a flat second structural member 3.
- the first structural member 2 includes a bottom wall portion 2a, a pair of side wall portions 2b and 2b provided on both sides in the width direction Z of the bottom wall portion 2a, and a pair of end portions of the side wall portions 2b and 2b. It has flanges 2c and 2c and ridges 2d, 2d, 2e and 2e.
- the lengths of the pair of side wall portions 2b are equal to each other.
- the second structural member 3 has a top wall portion 3a disposed to face the bottom wall portion 2a, and a pair of joint portions 3c, 3c joined to the flange portions 2c, 2c.
- the cross-sectional height H of the hollow member 10 is the maximum length in the height direction X of the hollow member 10 in a cross section orthogonal to the longitudinal direction Y of the hollow member 10. That is, the cross-sectional height H is the largest distance among the distance between the surface (the bending inner surface) which is the inner side at the time of bending deformation of the hollow member 10 and the surface (the bending outer surface) which faces the surface.
- the top wall 3a corresponds to the bending inner side
- the bottom wall 2a corresponds to the bending outer side.
- the top wall 3a and the bottom wall 2a face each other and are parallel to each other. Therefore, the sectional height H of the hollow member 10 in the example of FIG. 85 is the distance in the height direction X between the outer wall surface of the top wall 3a and the outer wall surface of the bottom wall 2a facing the top wall 3a. It is.
- FIG. 86 is a cross-sectional view showing another example of the hollow member 10, and shows a cross section orthogonal to the longitudinal direction X of the hollow member 10.
- the top wall 3a corresponds to the bending inner side
- the bottom wall 2a corresponds to the bending outer side.
- the bottom wall 2a of the first structural member 2 and the top wall 3a of the second structural member 3 are not parallel to each other, but are mutually intersecting directions Is located in Therefore, the sectional height H of the hollow member 10 in the example of FIG.
- 86 is the largest distance among the distances in the height direction X between the outer wall surface of the top wall 3a and the outer wall surface of the bottom wall 2a, ie, The distance between the outer wall surface of the top wall 3a and the outer wall surface of the bottom wall 2a at the position of the ridge line 2d.
- FIG. 87 shows a specific example of the bending induction portion (hole portion) provided in the frame 1 and the filling member 5.
- the bottom wall 2a of the frame 1 is provided with a hole 60 as a bending induction part.
- the hole 60 is an opening formed through the bottom wall 2 a of the frame 1.
- the shape of the hole 60 is preferably, for example, a vertically-long rectangular shape extending in the width direction Z, but in addition, it may be any shape such as rectangular, polygonal, circular or elliptical. May be The bending deformation of the frame 1 is induced in the hole 60.
- the filling member 5 is provided inside the hole 60 of the frame 1 in intimate contact with the inner surface of the bottom wall 2 a around the hole 60.
- the filling member 5 is arranged to cover the whole of the hole 60 and the bottom wall 2 a of the peripheral portion.
- the extension lengths L P and L P are respectively the one end 5 E 1 or the other end 5 E 2 of the longitudinal direction Y of the filling member 5 and the one end 60 E 1 or the other end 60 of the hole 60.
- the extension lengths L P and L P on both sides may be the same, or any one extension length L P may be longer than the other extension length L P.
- the filling member 5 is disposed. As a result, in the example of the hole 60 shown in FIG. 87, the same effect as in the case of the bent portion 6a in the example of FIG. 83 can be obtained.
- FIG. 88 shows a specific example of the bending inducing portion (concave portion) provided in the frame 1 and the filling member 5.
- the bottom wall 2a of the frame 1 is provided with a recess 61 as a bending induction portion.
- the recessed portion 61 is a portion in which a part of the bottom wall portion 2 a of the frame 1 is recessed toward the inside.
- the shape of the recess 61 is preferably, for example, a vertically-long rectangular shape extending in the width direction Z, but in addition, it may be any shape such as rectangular, polygonal, circular or elliptical It is also good. Bending deformation of the frame 1 is induced in the recess 61.
- the filling member 5 is provided on the inside of the recess 61 of the frame 1 in close contact with the inner surface of the bottom wall 2a.
- the filling member 5 is disposed so as to cover the whole of the recess 61 and the bottom wall 2a of the peripheral portion thereof, and both end portions 5 E1 and 5 E2 of the filling member 5 in the longitudinal direction Y are longitudinal directions of the recess 61 respectively. Only the extension lengths L P and L P extend on both sides of the end portions 61 E1 and 61 E2 of Y in the longitudinal direction Y.
- the extension lengths L P and L P are respectively the one end 5 E 1 or the other end 5 E 2 of the longitudinal direction Y of the filling member 5 and the one end 61 E 1 or the other end 61 E 2 of the recess 61.
- the extension lengths L P and L P on both sides may be the same, or any one extension length L P may be longer than the other extension length L P.
- the filling member 5 is disposed.
- FIG. 89 shows a specific example of the bending inducing portion (convex portion) provided on the frame 1 and the filling member 5.
- a convex portion 62 is provided on the bottom wall portion 2a of the frame 1 as a bending induction portion.
- the convex portion 62 is a portion in which a part of the bottom wall portion 2 a of the frame 1 is formed so as to protrude outward.
- the shape of the convex portion 62 is preferably, for example, a vertically-long rectangular shape extending in the width direction Z, but in addition, it is an arbitrary shape such as rectangular, polygonal, circular or elliptical. May be The bending deformation of the frame 1 is induced by the convex portion 62.
- the filling member 5 is provided on the inner side of the convex portion 62 of the frame 1 in close contact with the inner surface of the bottom wall 2 a.
- the filling member 5 is disposed so as to cover the whole of the convex portion 62 and the bottom wall portion 2 a of the peripheral portion thereof, and both end portions 5 E1 and 5 E2 of the filling member 5 in the longitudinal direction Y
- the both ends 62 E 1 and 62 E 2 in the longitudinal direction Y extend on both sides in the longitudinal direction Y by extension lengths L P and L P.
- the extension lengths L P and L P are respectively the one end 5 E 1 or the other end 5 E 2 of the longitudinal direction Y of the filling member 5 and the one end 62 E 1 or the other end 62 of the convex portion 62. It corresponds to the distance between E2 and E2 . As described above, the extension lengths L P and L P on both sides may be the same, or any one extension length L P may be longer than the other extension length L P. Similarly to the above, within the range of the L P ⁇ H / 2, the filling member 5 is disposed. Thereby, in the example of the convex part 62 shown in FIG. 89, the same effect as the case of the bent part 6a in the example of FIG. 83 can be obtained.
- FIG. 90 shows a specific example of the bending inducing portion (plate thickness changing portion) provided on the frame 1 and the filling member 5.
- a plate thickness change portion 113 is provided on the bottom wall portion 2a of the frame 1 as a bending induction portion.
- the thickness change portion 113 is a boundary portion between the first thickness portion 111 and the second thickness portion 112 which are different in thickness of the steel plate, and is provided linearly in the width direction Z, for example. Bending deformation of the frame 1 is induced in the thickness change portion 113.
- the filling member 5 is provided inside the thickness change portion 113 of the frame 1 in close contact with the inner surface of the bottom wall 2a.
- Filling member 5 is arranged to cover bottom wall portion 2a of the entire thickness changing portion 113 and its peripheral portion, and both end portions 5 E1 and 5 E2 of filling member 5 in the longitudinal direction Y have a thickness
- the extension lengths L P and L P extend on both sides of the change portion 113 in the longitudinal direction Y.
- the extension lengths L P and L P correspond to the distance between the one side end 5 E 1 or the other side end 5 E 2 of the longitudinal direction Y of the filling member 5 and the thickness change portion 113, respectively.
- the extension lengths L P and L P on both sides may be the same, or any one extension length L P may be longer than the other extension length L P.
- the filling member 5 is disposed within the range of the L P ⁇ H / 2, the filling member 5 is disposed.
- FIG. 91 shows a specific example of the bending induction portion (different strength portion) provided on the frame 1 and the filling member 5.
- a different strength portion 63 is provided as a bending induction portion.
- the different strength portion 63 is a portion where the strength of the bottom wall portion 2a of the frame 1 is partially reduced, and is, for example, provided in a strip shape extending in the width direction Z. Bending deformation of the frame 1 is induced at the different strength portion 63.
- the filling member 5 is provided inside the different strength portion 63 of the frame 1 in close contact with the inner surface of the bottom wall 2a.
- the filling member 5 is disposed so as to cover the whole of the different strength portion 63 and the bottom wall 2a of the peripheral portion, and both ends 5 E1 and 5 E2 of the filling member 5 in the longitudinal direction Y are different strength portions.
- the both ends 63 E 1 and 63 E 2 in the longitudinal direction Y of 63 extend by extending lengths L P and L P on both sides in the longitudinal direction Y.
- the extension lengths L P and L P are respectively the one end 5 E1 or the other end 5 E2 of the longitudinal direction Y of the filling member 5 and the one end 63 E1 or the other end of the different strength portion 63. 61 Equivalent to the distance between E2 . As described above, the extension lengths L P and L P on both sides may be the same, or any one extension length L P may be longer than the other extension length L P. Similarly to the above, within the range of the L P ⁇ H / 2, the filling member 5 is disposed. Thus, even in the example of the different strength portion 63 shown in FIG. 91, an effect similar to that of the case of the bent portion 6a in the example of FIG. 83 can be obtained.
- the filling member 5 is disposed at least in the bending induction portion, it is possible to suppress the cross-sectional deformation of the frame 1 generated at the time of bending deformation induced by the bending induction portion, and maintain the load bearing performance of the frame 1 high. Furthermore, the filling member 5 is disposed so as to cover the bending induction portion and the peripheral portion thereof, thereby further suppressing the out-of-plane deformation of the frame 1 generated at the time of bending deformation induced by the bending induction portion. Load performance can be maintained higher. Therefore, the energy absorption amount of the frame 1 at the time of load input can be further improved.
- the extension length L P , L P of the filling member 5 from the bending induction portion or from the end portion of the bending induction portion is equal to or less than a half of the cross sectional height H of the frame 1 (hollow member 10).
- the filling member 5 is disposed so as to cover the entire longitudinal direction Y of the bending induction portion and the peripheral portion thereof. Thereby, the filling member 5 is not disposed in the range where the improvement effect of the collision safety performance of the frame 1 is low. Therefore, it is possible to reduce the unnecessary weight increase of the frame 1 due to the arrangement of the filling member 5.
- the filling member 5 by arranging the filling member 5 so as to satisfy L P ⁇ H / 2, it is possible to improve the energy absorption amount at the time of load input with high mass efficiency.
- FIG. 92 is a plan view showing a specific example of the frame 1 when viewed from the X-axis direction.
- the frame 1 is provided with a hole 60c as a bending induction portion.
- the hole 60c is provided in a substantially rectangular shape extending in the width direction Z at the bottom wall 2a of the hollow member 10, as described with reference to FIG.
- the filling member 5 is provided in close contact with the hollow member 10 in the hole 60 c. More specifically, the filling member 5 extends in the longitudinal direction Y from the entire hole 60c and the end 60c E1 or 60c E2 of the hole 60c to the bottom wall 2a of the peripheral portion of the hole 60c. It is arranged over the range of The portion of the filling member 5 beyond the end 60c E1 or the end 60c E2 of the hole 60c is disposed in intimate contact with the inner surface of the bottom wall 2a. Further, the filling member 5 extends in the width direction Z from the entire hole 60c and the end 60c E3 or the end 60c E4 of the hole 60c to the bottom wall 2a of the peripheral portion of the hole 60c. It is arranged over the range of The portion of the filling member 5 beyond the end 60c E3 or the end 60c E4 of the hole 60c is disposed in intimate contact with the inner surface of the bottom wall 2a.
- the filling member 5 is arranged to cover the entire hole 60c. Therefore, even if bending occurs in any region in the longitudinal direction Y in the hole 60c, bending deformation occurs in at least the region in which the filling member 5 is disposed. Therefore, even when bending occurs in any region in the longitudinal direction Y in the hole 60c, the out-of-plane deformation of the frame 1 can be suppressed, and the load bearing performance of the frame 1 can be maintained high. Therefore, the energy absorption amount of the frame 1 at the time of load input can be improved.
- FIG. 93 is a plan view showing another specific example of the frame 1 when viewed from the X-axis direction.
- the hole 60 c is provided on the bottom wall 2 a of the hollow member 10 in a vertically elongated substantially rectangular shape extending in the width direction Z.
- the hole 60c corresponds to a bending induction portion in the frame 1 shown in FIG.
- the filling member 5 is provided in close contact with the inner surface of the bottom wall 2a of the hollow member 10 so as to cover a part of the hole 60c. Specifically, the filling member 5 is disposed so as to cover one side portion (region 601) of the longitudinal direction Y of the hole 60c in the longitudinal direction Y and not to cover the other side portion (region 602), and the hole It is arranged over a range from one end 60c E1 of the longitudinal direction Y of 60c to the bottom wall 2a. The portion of the filling member 5 beyond the end 60c E1 of the hole 60c is disposed in intimate contact with the inner surface of the bottom wall 2a.
- the filling member 5 covers the whole of the hole 60c (area 601) in the width direction Z and extends beyond the end 60c E3 or 60c E4 of the hole 60c to the bottom wall 2a. It is arranged over the range of The portion of the filling member 5 beyond the end 60c E3 or the end 60c E4 of the hole 60c is disposed in intimate contact with the inner surface of the bottom wall 2a.
- the filling member 5 is disposed in a portion (region 601) in the longitudinal direction Y of the hole 60c and not disposed in the other portion (region 602) of the hole 60c. Since the filling member 5 is not arranged at least in the region 602, the weight increase of the frame 1 associated with the arrangement of the filling member 5 can be reduced. On the other hand, in the region 602, since the filling member 5 is not disposed, a resistance effect against deformation of the frame 1 by the filling member 5 can not be obtained. Thus, the region 602 is more easily bent than the region 601.
- the filling member 5 is disposed in the area 601 near the area 602.
- the filling member 5 disposed in the region 601 can suppress the out-of-plane deformation of the frame 1 caused by the bending in the vicinity of the portion where the bending occurs.
- the filling member 5 can suppress the out-of-plane deformation of the frame 1 in the portion.
- FIG. 94 is a plan view showing another specific example of the frame 1 when viewed from the X-axis direction.
- the hole 60 c is provided on the bottom wall 2 a of the hollow member 10 in a vertically elongated substantially rectangular shape extending in the width direction Z.
- the hole 60c corresponds to a bending induction portion in the frame 1 shown in FIG.
- the filling member 5 is provided in close contact with the inner surface of the bottom wall 2a of the hollow member 10 so as to cover a part of the hole 60c.
- the filling member 5 is disposed so as to cover the central portion (region 603) in the width direction Z of the hole 60c and not to cover both side portions (regions 604 and 604) in the width direction Z.
- the filling member 5 is disposed over the range from the end 60c E1 or the end 60c E2 in the longitudinal direction Y of the hole 60c to the bottom wall 2a of the peripheral part of the hole 60c.
- the portion of the filling member 5 beyond the end 60c E1 or the end 60c E2 of the hole 60c is disposed in intimate contact with the inner surface of the bottom wall 2a.
- the filling member 5 is disposed in a portion (region 603) in the width direction Z of the hole 60c and not disposed in the other portion (region 604) of the hole 60c. Since the filling member 5 is not arranged at least in the region 604, the weight increase of the frame 1 associated with the arrangement of the filling member 5 can be reduced. On the other hand, the filling member 5 is disposed in the region 603 which occupies the entire longitudinal direction Y of the hole 60 c. Therefore, even if bending occurs in any region in the longitudinal direction Y in the hole 60c, bending deformation occurs in at least the region 603 in which the filling member 5 is disposed.
- the out-of-plane deformation of the frame 1 can be suppressed, and the load bearing performance of the frame 1 can be maintained high. Therefore, the energy absorption amount of the frame 1 at the time of load input can be improved.
- the cross-sectional shape of the hollow member 10 is circular.
- the filling member 5 is disposed in close contact with the inner surface of the hollow member 10 at a bending induction portion (for example, the hole 60) (not shown).
- the filling member 5 includes an arc-shaped close contact surface 501 in close contact with the inner surface of the hollow member 10 and a curved release surface 502 not in contact with the inner surface of the hollow member 10.
- the filling member 5 is preferably disposed on the side with the bend inducing portion (for example, the side on which the hole 60 is formed) than the boundary 19 of the hollow member 10. Furthermore, it is desirable that the filling member 5 be disposed in a range in which the release surface 502 does not exceed the boundary 19.
- a boundary is a surface which divides the height of the bending direction of a cross section in half. In other words, it is a surface defined by the center of the height in the bending direction in the cross section.
- the boundary 19 is a surface in which the stress applied at the time of bending deformation is substantially zero. If the plane in which the stress applied during bending deformation is zero is defined as the bending neutral plane, the bending neutral plane and the boundary 19 are strictly different. The reason that the bending neutral plane and the boundary 19 do not coincide is as follows.
- the rigidity of compression and tension of the structural material is different, the thickness of the structural material is not always the same, the side with the filling member 5 is less likely to be deformed, and the neutral plane moves to the filling member 5 side, bending
- the deformation is also accompanied by a compressive or tensile deformation in the axial direction, and so on.
- the boundary 19 is regarded as the bending neutral plane.
- the bending direction is a direction from the center of gravity of the cross section toward the bending induced portion. This is because the hollow member 10 is buckled and bent at the bending induction portion.
- the bending direction is the direction obtained by combining the bending vectors of the respective bending induced parts.
- the magnitude of the bending vector changes depending on the type, position, size and the like of the bending induction portion. For example, when the bending induced portion is small, the vector of bending by the bending induced portion is small.
- the bending induction portion is provided to ensure that the portion to be bent is buckled. Therefore, the bending direction can be estimated by considering one or two of the largest bending induction portions. For example, in the case of bending a certain surface, a bending induction portion is provided on the ridges on both sides of the surface. In this case, it can be easily understood that the bending direction is the direction from the center of gravity toward the surface, by looking at the two bending induced portions provided on the ridge line.
- the Young's modulus of the filling member 5 is lower than that of the metal plate constituting the hollow member 10. Therefore, the filling member 5 is easily deformed when stress is applied.
- the reason why the filling member 5 suppresses the deformation of the hollow member 10 is to suppress the out-of-plane deformation of the portion of the hollow member 10 to which the compressive stress is applied. That is, the filling member 5 inhibits the out-of-plane deformation of the hollow member 10. Therefore, it is effective that the filling member 5 be disposed in close contact with the surface which is compressed and deformed when the hollow member 10 is deformed.
- the filling members 5 be disposed in close contact with the surface that is compressively deformed when the hollow member 10 is deformed.
- the surface which is compressively deformed at the time of deformation of the hollow member 10 is the surface on the side with the bending induction portion (the metal plate constituting the hollow member 10) than the boundary 19 of the hollow member 10.
- the filling member 5 is divided from the boundary 19 which bisects the cross section in the height direction of the cross section defined in the direction from the center of gravity to the bending induction portion. It is desirable to be disposed in close contact with the side on which the bending induction portion is present.
- the cross-sectional shape of the hollow member 10 is an ellipse.
- the filling member 5 is disposed in close contact with the inner surface of the hollow member 10 at a bending induction portion (not shown).
- the filling member 5 is composed of a curved adhesion surface 503 in close contact with the inner surface of the hollow member 10 and a straight release surface 504.
- the filling member 5 is disposed inward of the boundary 19 of the hollow member 10 in the cross section of the hollow member 10. That is, the filling member 5 is disposed in a range in which the release surface 504 does not exceed the boundary 19.
- the cross-sectional shape of the hollow member 10 is circular.
- the filling member 5 is disposed in close contact with the inner surface of the hollow member 10 at a bending induction portion (not shown).
- the filling member 5 comprises an arc-shaped adhesion surface 505 in close contact with the inner surface of the hollow member 10, a pair of linear first release surfaces 506, 507, and an arc-shaped second release surface 508.
- the filling member 5 is disposed inward of the boundary 19 of the hollow member 10 in the cross section of the hollow member 10. That is, the filling member 5 is disposed in a range in which the first release surfaces 506 and 507 do not exceed the boundary 19.
- the cross-sectional shape of the hollow member 10 is circular.
- the filling member 5 is disposed in close contact with the inner surface of the hollow member 10 at a bending induction portion (not shown).
- the wall hole 21 is provided in the vicinity of a bending induction portion (not shown) of the hollow member 10.
- the filling member 5 is in close contact with the hollow member 10 through the wall hole 21 as described in the fourth embodiment.
- the filling member 5 is provided in close contact with the first filling portion 51 in close contact with the inner wall surface of the hollow member 10, the second filling portion 52 in close contact with the outer wall surface of the hollow member 10, and the wall hole 21 And a third filling portion 53 connecting the first filling portion 51 and the second filling portion 52.
- the filling member 5 is disposed inward of the boundary 19 of the hollow member 10 in the cross section of the hollow member 10. That is, the filling member 5 is disposed in a range in which the first filling portion 51 does not exceed the boundary 19.
- filling member 5 is disposed on the inner side of bending induced by the bending inducing portion than boundary 19 of hollow member 10.
- the boundary 19 has zero stress applied to bending deformation, and the boundary 19 has less stress applied to bending deformation. Therefore, out-of-plane deformation does not easily occur in the hollow member 10 at the boundary 19. Since the arrangement range of the filling member is limited to the bending inside of the boundary 19, the filling member 5 is not arranged at least in the area outside the boundary 19 in the bending outer side near the boundary 19 where the out-of-plane deformation hardly occurs. Therefore, the mass efficiency of the collision safety performance by the filling member 5 can be maintained.
- Example of First Embodiment> In order to confirm the effect of the present invention, in the embodiments described below, the effect of improving the collision safety performance of the frame by reinforcement and the filling member was verified. The following examples are merely for verifying the effects of the present invention, and the present invention is not limited to the following examples.
- the stroke St (mm) at the time of the collision with respect to was calculated.
- the stroke St indicates the amount of movement of the collision object starting from the end face on the collision side of the frame 1 as shown in FIG. That is, the same E.I. A. The shorter the stroke St, the higher the collision safety performance.
- a conventional frame reference example 1
- a frame constituted only by the hollow member 10 according to the present embodiment comparative example 1
- reinforcement inside the hollow member 10 according to the present embodiment A frame provided with only 4
- a frame provided with only the filling member 5 without a gap inside the hollow member 10 according to the present embodiment comparativative example 3
- the hollow member 10 according to the present embodiment A frame (Example 1) provided with reinforcement 4 and adhesively fixed filling member 5 inside was prepared.
- the arrangement positions of the reinforcement 4, the filling member 5 and the bending portion 6 inside the hollow member 10 in the reference example 1 each comparative example and the example 1 are the arrangement positions shown in FIG. 5, FIG. 6 and FIG. It is the same.
- frame used in the present Example is as follows (a unit is mm).
- L FL 500
- D FL1 70
- D FL2 90
- L R 240
- S FL 60
- L FMA 70
- L FMB 70
- the collision load is input to the longitudinal end of the frame of each sample, and the E.V. A. Calculated for Moreover, the cross-sectional shape in the bending part of the flame
- FIG. 99 and FIG. 100 are diagrams showing changes in cross-sectional shape in a bent portion of a frame according to Comparative Example 2 and Example 1 before and after collision simulation.
- the out-of-plane deformation occurs in the X-axis direction, and buckling occurs.
- out-of-plane deformation also occurs in the bottom wall portion 2a, the side wall portion 2b, and the ridge portion 2d. Therefore, the cross-sectional shape of the hollow member 10 is largely changed. It is considered that this is because the effect of suppressing the cross-sectional deformation of the hollow member 10 by the reinforcement 4 is lost by the main surface portion 4a being out-of-plane deformed.
- out-of-plane deformation does not occur in the main surface portion 4a of the reinforcement 4 of the frame 1 according to the first embodiment.
- the cross-sectional shape of the hollow member 10 does not change before and after the collision. It is considered that this is because the effect of suppressing the out-of-plane deformation of the reinforcement 4 is exhibited by the filling member 5A disposed in close contact with the reinforcement 4. Therefore, it is considered that the suppression effect of the cross-sectional deformation of the hollow member 10 by the reinforcement 4 is exhibited.
- FIG. 101 shows the E.V. A. Is a graph showing The frame related to each sample is E.I. A. It buckles almost completely at 14 kJ.
- the stroke St 14kJ of the frame according to the first embodiment is smaller than the stroke St 14kJ of the frame according to the other comparative example.
- the stroke St 14kJ of the frame was at the same level although the weight of the frame according to Example 1 was about 30% lower.
- FIG. A It has been shown that the increase rate of is larger than that of the frames according to the other comparative examples. It is considered that this is because the cross-sectional shape of the frame at the bending portion due to the input of the collision load is maintained, and the collision energy absorption amount is larger than that of the other frames in which the cross-sectional shape changes.
- FIG. 103 is a graph showing the margin for improvement of the stroke St 14kJ of the frames according to Comparative Example 2, Comparative Example 3 and Example 1 with respect to the stroke St 14kJ of the frame according to Comparative Example 1.
- improvement margin of the stroke St 14 kJ frame according to the first embodiment the improvement margin of the stroke St 14 kJ frame according to improve cost and Comparative Example 3 of the stroke St 14 kJ frame according to Comparative Example 2 Greater than sum. From this result, it has become clear that, by closely arranging the filling member to the reinforcement, it is possible to more effectively suppress the change of the cross-sectional shape of the frame due to the reinforcement.
- Example of Second Embodiment> In order to confirm the effect of the present invention, in the embodiment described below, the improvement effect of the collision safety performance of the frame by the filling member 5 was verified. The following examples are merely for verifying the effects of the present invention, and the present invention is not limited to the following examples. Moreover, about the filling member which concerns on each Example, unless it distinguishes in particular, it will be called and demonstrated as the "filling member 5".
- the present inventors used simulations to calculate the maximum loads L max (kN) of various frames for the same collision load, in order to verify the improvement effect of the collision safety performance of the frame by the filling member 5.
- the maximum load L max means the maximum load value in the load-stroke curve with respect to the frame 1 when the collision load F is input to the frame 1. That is, it can be said that the larger the maximum load L max for the same collision load, the higher the load bearing performance, ie, the higher the collision safety performance.
- the filling member 5 is disposed in close contact with a predetermined portion inside the bent portions 6A and 6B of the frame 1 shown in FIG. 12, and the end in the longitudinal direction of the frame 1 is not shown. I made the collision body collide. As a result, the collision load F is input to the frame 1.
- the maximum load L max of the collision body after the input of the collision load F was analyzed for each example and reference example, and the results were examined.
- the plate thickness of the first structural member 2 is 2.0 mm, and the strength of the first structural member 2 is 780 MPa.
- the plate thickness of the second structural member 3 is 1.5 mm, and the strength of the second structural member 3 is 690 MPa.
- the weight of the frame 1 is 3.63 kg.
- the arrangement of the filling member 5 in the bending portion 6A according to each example is as follows.
- the numerical values in the parentheses are values regarding the thickness and arrangement position of the filling member 5.
- Example 7 Arrangement shown in FIG.
- the filling member 5 according to the first to eighth embodiments is disposed in intimate contact with the inner surface of the bottom wall 2a (and the inner side of the ridge line 2d).
- the filling member 5 according to the present embodiment is reversed in the X direction, and is disposed in close contact with the inner surface of the ceiling wall 3a (and the inner side of the ridge portion 2e).
- Example 1 is arranged as shown in FIG.
- the filling member 5 which concerns on Example 9 and 10 is closely_contact
- the density of the filling member 5 was 176 kg / m 3, and the Young's modulus and the yield stress of the filling member 5 were 100 MPa and 2.1 MPa.
- the frame 1 is not provided with the filling member 5.
- Table 2 shows the total weight of the frame 1 and the weight of the filling member 5 according to each example and reference example.
- the weight of the collision body colliding with the end of the frame 1 was 201 kg, and the velocity of the collision body when colliding with the end of the frame 1 was 12 m / s.
- the weight of the filling member 5 according to each example and reference example, the maximum load amount L max of the frame, and the load improvement rate I L (kN / g) are shown in Table 3.
- the maximum load amount L max is a load that the frame can withstand against a collision load.
- the load improvement rate I L is the difference between the maximum load of the frame according to the reference example and the maximum load of the frame according to the one example, the weight of the filling member 5 provided in the frame according to the one example It is the value divided by (g). That is, the load rate of improvement I L is a value indicating the weight efficiency of the load bearing performance of the filling member 5.
- Example 1 Comparing Example 1 and Example 2, but for the maximum load amount L max showed the same results, the load improvement I L showed better results in Example 1. Therefore, by disposing the filling member 5 in the central portion of the bottom wall portion 2a (the top wall portion 3a), the mass efficiency of the filling member 5 with respect to load bearing performance can be improved. Therefore, it is possible to further reduce the weight of the vehicle.
- Example 10 For Example 10, a high maximum load amount L max was obtained. From this, by disposing the filling member 5 in close contact with not only the bottom wall portion 2a (the top wall portion 3a) but also the ridge line portion 2d (2e) and the side wall portion 2b continuously, Not only the absorption characteristics are improved, but also the load bearing performance of the frame 1 can be further improved.
- the filling member 5 mainly in close contact with the inner surface of the bottom wall 2a (the top wall 3a), the load bearing performance of the thinned frame 1 is maintained high. It is possible.
- Example of Third Embodiment> In order to confirm the effect of the present invention, in the embodiment described below, the improvement effect of the collision safety performance of the frame by the filling member 5 was verified. The following examples are merely for verifying the effects of the present invention, and the present invention is not limited to the following examples. Moreover, about the filling member which concerns on each Example, unless it distinguishes in particular, it will be called and demonstrated as the "filling member 5".
- the stroke St indicates the amount of movement of the collision body starting from the end face on the collision side of the frame 1 as shown in FIG. That is, it can be said that, as the stroke St is shorter for the same collision energy absorption amount, the collision energy absorption characteristics are higher, that is, the collision safety performance is higher.
- the filling member 5 is disposed in close contact with a predetermined portion inside the bent portions 6A and 6B of the frame 1 shown in FIG. I made the collision body collide.
- the collision load F is input to the frame 1.
- the maximum stroke St max of the colliding body after the input of the collision load F was analyzed for each example and reference example, and the results were examined.
- the plate thickness of the first structural member 2 is 2.0 mm, and the strength of the first structural member 2 is 780 MPa.
- the plate thickness of the second structural member 3 is 1.5 mm, and the strength of the second structural member 3 is 690 MPa.
- the weight of the frame 1 is 3.63 kg.
- the arrangement of the filling member 5 in the bending portion 6A according to each example is as follows.
- the numerical values in the parentheses are values regarding the thickness and arrangement position of the filling member 5.
- Example 6 Arrangement shown in FIG.
- the filling member 5 according to the fourth to tenth embodiments is disposed in intimate contact with the inner surface of the bottom wall portion 2a (and the inner side of the ridge portion 2d).
- the filling member 5 according to the present embodiment is reversed in the X direction, and is disposed in close contact with the inner surface of the ceiling wall 3a (and the inner side of the ridge portion 2e).
- the density of the filling member 5 was 176 kg / m 3, and the Young's modulus and the yield stress of the filling member 5 were 100 MPa and 2.1 MPa.
- the frame 1 is not provided with the filling member 5.
- Table 4 shows the total weight of the frame 1 and the weight of the filling member 5 according to each example and reference example.
- the weight of the collision body colliding with the end of the frame 1 was 201 kg, and the velocity of the collision body when colliding with the end of the frame 1 was 12 m / s.
- Table 5 shows the weight of the filling member 5 according to each example and reference example, the maximum stroke St max of the collision object with respect to the frame, and the stroke improvement rate I St (mm / g).
- the maximum stroke St max is, as shown in FIG. 22, a predetermined E.V. starting from the end face on the collision side of the frame 1.
- A. The maximum displacement in the longitudinal direction of the frame 1 after the collision object having the collision with the frame 1 is shown.
- the stroke improvement rate I St is the difference between the maximum stroke of the frame according to the reference example and the maximum stroke of the frame according to the one example, the weight of the filling member 5 provided in the frame according to the one example It is the value divided by (g). That is, the stroke improvement rate I St is a value indicating the mass efficiency of the absorption characteristic of the collision energy by the filling member 5.
- Example 1 and Example 2 were compared, about the largest stroke Stmax , although Example 2 showed a better result, stroke improvement rate ISt was the same. Therefore, by adjusting the filling amount of the filling member 5 disposed on the inner surface of the side wall portion 2b according to the collision safety performance required for the frame, weight reduction of the vehicle is ensured while securing an appropriate collision energy absorption characteristic. Can be achieved.
- Example 1 and Example 3 are compared, the result that the weight of the filling member 5 of Example 1 is smaller, and the maximum stroke St max is smaller was obtained. Further, as shown in the fifth and sixth embodiments, the high stroke improvement rate Ist was obtained also in the case of arranging only on the inner side of the ridge line portion 2d. From this, it is shown that the absorption characteristic of the collision energy of the frame 1 can be more effectively improved by closely arranging the filling member 5 inside the ridge portion 2 d (2 e).
- the filling member 5 is not only the inner surface of the side wall 2b, but the inner surface of the bottom wall 2a (the top wall 3a) and the ridge line 2d (2e) It has been shown that it is preferable to place the inner side in close contact with each other.
- Examples 7, 9 and 10 show better results for the maximum stroke St max . Therefore, by placing the filling member 5 in close contact with the inner surface of the bottom wall portion 2a (the top wall portion 3a), the collision is better than simply placing the filling member 5 in close contact with the inside of the ridge line portion 2d (2e). The time stroke can be further reduced.
- Example of Fourth Embodiment> In order to confirm the effect of the present invention, in Examples described below, the effect of improving the adhesion of the filling member (for example, a resin material) according to the embodiment to a hollow member (for example, a metal member) was verified.
- the following examples are merely for verifying the effects of the present invention, and the present invention is not limited to the following examples.
- the present inventors evaluated CTS (Cross Tension Strength: cross peel strength) by a cross tension test in order to verify the effect of improving the adhesion of the filling member to the hollow member. More specifically, in this test, cross tensile test pieces were prepared for each of the example and the comparative example, and these were subjected to a tensile test to evaluate the joint strength CTS. The magnitude of the joint strength corresponds to the magnitude of the adhesion of the filling member to the hollow member.
- FIG. 104 is a top view showing the configuration of a sample used in the cross tension test according to Example 1 and Example 2.
- FIG. 105 is a side sectional view showing the configuration of the sample according to the first embodiment.
- the sample according to the first embodiment is formed by filling the filling member 50 between the first test piece 101 and the second test piece 102 and curing the same. It is a cross tension test piece in which the second test piece 102 is joined.
- wall holes 103 and 104 are provided at the centers of the first test piece 101 and the second test piece 102. The diameter of each of the wall holes 103 and 104 is 22 mm.
- a portion of the filling member 50 bulges from the wall holes 103 and 104 and becomes a second filling portion 52 in close contact with the outer wall surfaces of the first test piece 101 and the second test piece 102. Further, the first filling portion 51 and the second filling portion 52 in close contact with the inner wall surfaces of the first test piece 101 and the second test piece are connected by the third filling portion 53 provided in close contact with the wall holes 103 and 104. Be done. That is, the filling member 50 is in a state of being mechanically locked and joined to the first test piece 101 and the second test piece 102 by adhesive force.
- FIG. 106 is a side cross sectional view showing the configuration of the sample according to the second embodiment.
- the sample according to the second embodiment is tested by filling the filling member 50 between the first test piece 201 and the second test piece 202 and curing it. It is a cross tension test piece in which pieces 202 are joined.
- wall holes 203 and 204 are provided at the centers of the first test piece 201 and the second test piece 202 according to the second embodiment.
- the wall holes 203 and 204 are subjected to burring, and the hole edges of the wall holes 203 and 204 protrude in directions opposite to each other.
- the diameters of the wall holes 203 and 204 after burring are 22 mm respectively.
- a portion of the filling member 50 bulges from the wall holes 203 and 204 and becomes a second filling portion 52 in close contact with the outer wall surface of the first test piece 201 and the second test piece 202. Further, the first filling portion 51 and the second filling portion 52 in close contact with the inner wall surfaces of the first test piece 201 and the second test piece are connected by the third filling portion 53 provided in close contact with the wall holes 203 and 204. Be done. That is, the filling member 50 is in a state of being mechanically locked and joined to the first test piece 201 and the second test piece 202 by adhesive force.
- FIG. 107 is a side sectional view showing the configuration of a sample according to a comparative example.
- the sample according to the comparative example is filled with the filling member 50 between the first test piece 931 and the second test piece 932 and cured to thereby form the first test piece 931 and the second test piece. It is a cross tension test piece which joined 932.
- the filling member 50 is in a state of being bonded to the first test piece 931 and the second test piece 932 only by the adhesive force.
- the characteristics and sizes of the first test piece, the second test piece and the filling member used in each example and comparative example are as follows.
- fixing holes for fixing jigs for pulling these in the tensile direction at the time of the tensile test are provided on both end sides of the first test piece and the second test piece of each example and comparative example. It is done.
- the samples according to the respective examples and comparative examples were pulled at a speed of 1 mm / min to measure the maximum load (N).
- the number of samples according to each example and comparative example was two.
- FIG. 108 is a graph showing the maximum load of each sample measured by the cross tension test.
- the graphs of Example 1-1 and Example 1-2 show each of the test results of the sample according to Example 1.
- the graphs of Examples 2-1 and 2-2 show each of the test results of the sample according to Example 2.
- the graphs of Comparative Example 1 and Comparative Example 2 show each of the test results of the samples according to the Comparative Example.
- Example 1 and Example 2 were significantly larger than the maximum load of the sample according to the comparative example. From this result, rather than simply bonding the filling member to the test piece corresponding to the hollow member, a high load is applied to the test piece by bringing the filling member into close contact with both sides of the test piece and locking it to the test piece. It has been shown that even if the filling member is kept in intimate contact with the test piece.
- Example 1 when Example 1 and Example 2 were compared, it was shown that the maximum load of the sample concerning Example 2 is larger than the maximum load of the sample concerning Example 1. From this result, it was shown that the joint strength between the test piece and the filling member can be further increased by providing the filling member to bite into the hole edge of the burred wall hole.
- a high load is applied to the test piece by causing the filling member to pass through the hole provided in the test piece corresponding to the hollow member and bringing the filler into close contact with both sides of the test piece. Also, the filling member does not easily come off the test piece. From this, it is possible to maintain the state in which the filling member is in close contact with the hollow member by locking the filling member to the hollow member via the wall hole. That is, even if a load that may cause an out-of-plane deformation in the hollow member is given by the collision load, the filling member can stably contribute to the collision safety performance of the vehicle structural member.
- Example regarding arrangement range of filling member> In order to confirm the effect of the present invention, in the embodiment described below, the improvement effect of the collision safety performance of the frame by the filling member 5 was verified. The following examples are merely for verifying the effects of the present invention, and the present invention is not limited to the following examples. Moreover, about the filling member which concerns on each Example, unless it distinguishes in particular, it will be called and demonstrated as the "filling member 5".
- the present inventors use simulations to absorb the energy absorption of various frames for the same stroke St (mm). kJ) was calculated.
- the stroke St indicates the amount of movement of the collision body starting from the end face on the collision side of the frame 1 shown in FIG. That is, the E.V. for the same stroke St. A. Is higher, the collision safety performance is higher.
- FIG. 109 is a diagram for explaining simulation setting of an example according to one embodiment.
- the frame 1 according to the present embodiment is composed of a first structural member 2 having a hat-shaped cross section and a second structural member 3 having a plate shape, and has a closed cross-sectional shape. Furthermore, the frame 1 has the reinforcement 4 inside.
- a bending induction portion is provided in one region 69 of the bottom wall portion 2a.
- the filling member 5 is disposed in close contact with the inner surface of the region 69 of the frame 1 provided with the bending induction portion. Extending length L P of FIG.
- 109 is a length of a portion extending outwardly of the longitudinal inducing portion bent ends of the bending-induced portion of the filling member 5 (Y-axis direction). In this simulation, extending length L P of the longitudinal front and rear respectively is assumed to be equivalent.
- the first structural member 2, the second structural member 3 and the reinforcement 4 are all formed of steel plates.
- the plate thickness of the first structural member 2 is 1.4 mm, and the strength of the first structural member 2 is 1180 MPa.
- the plate thickness of the second structural member 3 is 1.4 mm, and the strength of the second structural member 3 is 1180 MPa.
- the thickness of the reinforcement 4 is 0.5 mm, and the strength of the reinforcement 4 is 270 MPa.
- the Young's modulus of the filling member 5 is 100 MPa, and the yield stress is 2.1 MPa.
- the cross-sectional height H of the hollow member 10 is 72 mm.
- Example 2 No thickness changing part, no filling member
- the present inventors fixed the both ends in the longitudinal direction of the frame concerning each example and each reference example, and gave the compression bending of a 40-mm stroke by constant velocity of 500 mm / s. Then, the E.V. A. Calculated for Further, the cross-sectional shapes at the XV-XV cutting lines shown in FIG. 109 of the frame 1 according to each example before and after deformation by simulation are compared.
- FIG. 110 is a diagram showing a list of cross-sectional views before and after deformation of Examples 1 to 5 and Reference Example 1.
- FIG. 110 cross-sectional views of Reference Example 1, Example 1 and Example 2 before and after deformation are shown sequentially from the upper left to the right, and Example 3, Example 3 and Example from the lower left to the right.
- Cross-sectional views before and after deformation of Example 5 are shown.
- reference numerals are attached only to the cross-sectional view of the frame 1 before the modification of the second embodiment.
- FIG. 111 is a graph showing an absorbed energy ratio, which is a ratio of the absorbed energy amount when the absorbed energy amount of Reference Example 1 is 1 in Examples 1 to 5 and Reference Example 1.
- the horizontal axis of this graph is extending length L P, the vertical axis represents the absorbed energy ratio.
- Each plot in the graph corresponds to Example 1, Example 2, Example 3, Example 4, and Example 5 in order from the left.
- the absorbed energy ratio in Examples 1 to 5 exceeds 1. Therefore, the energy absorption amount is improved by arranging the filling member 5, and the collision safety performance is improved.
- Example 2 Comparing Example 1 with Example 2 to Example 5, the absorbed energy ratio of Example 2 to Example 5 is larger than the absorbed energy ratio of Example 1. Therefore, the absorbed energy ratio is larger when the filling member 5 is disposed so as to cover the peripheral portions on both sides in the longitudinal direction of the bending induction portion than in the case where the filling member 5 is disposed only in the bending induction portion. Performance is improved.
- Example 1 and Example 2 when comparing each of the absorbed energy ratio as the extended length L P becomes longer increasing. Therefore, the longer the length of extension L P, the energy absorption amount is increased, it is possible to improve the collision safety performance.
- the extension length L P in the fourth embodiment corresponds to one half of the cross sectional height H of the hollow member 10. Therefore, when the extended length L P exceeds one-half of the section height H of the hollow member 10, the collision safety performance by increasing the extending length L P is not improved.
- the filling member 5 in 1 Scope of half the section height H of the extended length L P is the hollow member 10 the useless filler member 5 not contributing to the improvement of collision safety performance You do not have to place it. Therefore, by placing the filling member 5 in 1 Scope of half the section height H of the extended length L P is the hollow member 10, it is possible to improve the collision safety performance at high mass efficiency.
- FIG. 112 is a view showing a list of cross-sectional views before and after deformation in Examples 6 to 10 and Reference Example 2.
- FIG. 112 cross-sectional views before and after deformation of the reference example 2, the example 6, and the example 7 are shown in order from the upper left to the right, and in the lower left, from the left to the right.
- Cross sectional views before and after deformation of Example 10 are shown.
- reference numerals are attached only to the cross-sectional view of the frame 1 before the modification of the seventh embodiment.
- FIG. 113 is a graph showing the absorbed energy ratio, which is the ratio of the absorbed energy amount when the absorbed energy amount of Reference Example 2 is 1 in Examples 6 to 10 and Reference Example 2.
- the horizontal axis of this graph is extending length L P, the vertical axis represents the absorbed energy ratio.
- Each plot in the graph corresponds to Example 6, Example 7, Example 8, Example 9, and Example 10 in order from the left.
- the absorbed energy ratio of Example 6 to Example 10 exceeds 1. Therefore, the energy absorption amount is improved by arranging the filling member 5, and the collision safety performance is improved.
- Example 6 Comparing Example 6 with Example 7 to Example 10, the absorbed energy ratio of Example 7 to Example 10 is larger than the absorbed energy ratio of Example 6. Therefore, the absorbed energy ratio is larger when the filling member 5 is disposed so as to cover the peripheral portions on both sides in the longitudinal direction of the bending induction portion than in the case where the filling member 5 is disposed only in the bending induction portion. Performance is improved.
- the extension length L P in the ninth embodiment corresponds to one half of the cross sectional height H of the hollow member 10. Therefore, when the extended length L P exceeds one-half of the section height H of the hollow member 10, the collision safety performance by increasing the extending length L P is not improved.
- the filling member 5 in 1 Scope of half the section height H of the extended length L P is the hollow member 10 the useless filler member 5 not contributing to the improvement of collision safety performance You do not have to place it. Therefore, by placing the filling member 5 in 1 Scope of half the section height H of the extended length L P is the hollow member 10, it is possible to improve the collision safety performance at high mass efficiency.
- the collision safety performance can be improved by arranging the filling member 5 so as to cover the peripheral portions on both sides in the longitudinal direction of the bending induction portion. Further, by disposing the filling member 5 in 1 Scope of half the section height H of the extended length L P is the hollow member 10, it is possible to improve the collision safety performance at high mass efficiency.
- Example of Total Plastic Moment Change Part In the following examples, the full plastic moment changing part functioning as a bending induction part was verified. The fact that the total plastic moment changing portion functions as a bending induced portion means that bending deformation is induced in the total plastic moment changing portion. The following embodiment is merely for verifying the total plastic moment changing portion functioning as a bending induced portion, and the present invention is not limited to the following embodiment.
- the inventors use a simulation to cause bending deformation in a plurality of hollow members having different degrees of change in the total plastic moment in the strength changing portion. The Then, the inventors verified how the relationship between the position of the strength change portion and the position at which the bending deformation occurred changes in accordance with the degree of change of the total plastic moment in the strength change portion.
- FIG. 114 is a plan view of a hollow member of an example according to one embodiment.
- the hollow member 810 according to the present embodiment is formed of a hat-shaped first structural member 812 having a cross-sectional shape and a plate-shaped second structural member 813, and has a closed cross-sectional shape.
- the first structural member 812 is located behind the second structural member 813 in the X-axis direction, that is, behind the second structural member 813 and has a hat-shaped cross-sectional opening It is facing the X axis direction near side.
- the second structural member 813 is located on the front side in the X-axis direction, with the Z-axis direction being the lateral direction and the Y-axis direction being the longitudinal direction.
- the hollow member 10 includes a first strength portion 814 and a second strength portion 815.
- the first strength portion 814 is provided on the left end 810 a side of the hollow member 10 in the longitudinal direction.
- the second strength portion 815 is provided continuously with the first strength portion 814 on the side of the right end 810 b in the longitudinal direction of the hollow member 10.
- the yield strength of the steel plate is different between the first strength portion 814 and the second strength portion 815, a portion at the boundary between the first strength portion 814 and the second strength portion 815 becomes the strength change portion 816.
- the strength change portion 816 the yield strength in the longitudinal direction of the hollow member 10 changes.
- FIG. 115 is a graph showing a change in a total plastic moment ratio of the hollow member 810 according to each example and reference example in the longitudinal direction.
- the change of the total plastic moment ratio from the left end 810a to the right end 810b is shown with the left end 810a of the hollow member 810 as a reference (that is, 1.0).
- the total plastic moment ratio is calculated by dividing the value of the total plastic moment at the target location by the reference value of the total plastic moment.
- the total plastic moment ratio is calculated.
- the position where the total plastic moment ratio changes from 1.0 is the position of the strength change portion 816. As shown in FIG.
- the total plastic moment ratio does not change regardless of the position of the hollow member 810 in the longitudinal direction. That is, in the reference example, the total plastic moment is the same between the first strength portion 814 and the second strength portion 815.
- the total plastic moment ratio changes stepwise between the left end 810a side and the right end 810b side of the hollow member 810, and the total plastic moment ratio on the right end 810b is 0.9.
- the total plastic moment ratio changes stepwise between the left end 810a side and the right end 810b side of the hollow member 810, and the total plastic moment ratio on the right end 810b side is 0.95.
- the total plastic moment ratio changes stepwise between the left end 810a side and the right end 810b side of the hollow member 810, and the total plastic moment ratio on the right end 810b side is about 1.11.
- the total plastic moment ratio of the strength change portion 816 is defined.
- the total plastic moment ratio of the strength change portion 816 is calculated by dividing the smaller one of the values of the total plastic moment before and after the change in the strength change portion 816 by the larger value.
- the total plastic moment ratio of the strength change portion 816 in each example and reference example is as follows. Reference example: 1.0 Example 1: 0.90 Example 2: 0.95 Example 3: 0.90
- the inventors of the present invention compress the hollow member 810 in the longitudinal direction by inputting the collision load F in the direction opposite to each other at both end portions 810a and 810b in the longitudinal direction of the hollow member 810 according to each embodiment and reference example. And caused bending deformation.
- the simulation results will be described below with reference to FIGS. 116 to 120.
- FIG. 116 is a diagram showing a region where bending deformation has occurred in the hollow member 810A according to the reference example. As shown in FIG. 116, bending deformation occurs in a region 817A located near the right end 810b of the hollow member 810A.
- FIG. 117 is a diagram showing a region where bending deformation has occurred in the hollow member 810B according to the first embodiment. As shown in FIG. 117, bending deformation occurs in a region 817B close to the strength change portion 816 of the hollow member 810B.
- FIG. 118 is a diagram showing a region where bending deformation has occurred in the hollow member 810C according to the second embodiment. As shown in FIG.
- FIG. 119 is a diagram showing a region where bending deformation has occurred in the hollow member 810D according to the third embodiment. As shown in FIG. 119, the bending deformation occurs in a region 817D close to the strength change portion 816 of the hollow member 810D.
- FIG. 120 is a graph showing changes in the ratio of the total plastic moment of the hollow member 810 in the longitudinal direction and the position where bending deformation has occurred according to each example and reference example.
- bending deformation is performed in regions 817B and 817D near the position where the total plastic moment ratio changes from 1.0 (that is, the position of strength change portion 816). Is occurring. From this, it is understood that in the first embodiment and the third embodiment, the strength change portion 816 functions as a bending induction portion.
- bending deformation occurs in a region 817C which is located away from the position where the total plastic moment ratio changes from 1.0.
- the strength change portion 816 does not function as a bending induction portion.
- the total plastic moment ratio remains unchanged at 1.0, and bending deformation occurs in a region 817A located at the same position as that in the second embodiment. That is, when the total plastic moment ratio of the strength change part 816 is 0.95 or more, the strength change part 816 does not function as a bending induction part.
- the strength change portion 816 when the total plastic moment ratio of the strength change portion 816 is 0.9, the strength change portion 816 functions as a bending induction portion. From this, it can be said that when the ratio of total plastic moment of the strength change portion 816 is 0.9 or less, the strength change portion 816 can function as a bending induction portion.
- the total plastic moment change portion can function as a bending induction portion.
- the total plastic moment changing portion in which the value of the total plastic moment decreases by 10% or more before and after the change can function as a bending induced portion.
- the inventors use simulations to apply collision loads to a plurality of frames having different Young's modulus of the filling member.
- the reaction force and the stroke were calculated.
- the simulation setting of this embodiment will be described below with reference to FIGS. 121 to 125 and Table 6.
- FIG. 121 is a side view of a frame of an example according to one embodiment.
- the frame 820 according to this embodiment includes a first structural member 822 having a hat-shaped cross-sectional shape and a plate-shaped second structural member 823, and has a closed cross-sectional shape.
- the opening of the hat-shaped cross-sectional shape of the first structural member 822 faces the X axis direction ⁇ side.
- the Z-axis direction is the lateral direction
- the Y-axis direction is the longitudinal direction.
- Both end portions of the first structural member 822 in the Z-axis direction are in contact with both end portions of the second structural member 823 in the Z-axis direction, and the first structural member 822 and the second structure
- the member 823 is joined.
- the frame 820 is provided with bending portions 826A and 826B which are curved in the longitudinal direction (Y-axis direction). Bends 826 A and 826 B are bend inducers of frame 820.
- the longitudinal length of the frame 820 is 500 [mm]. Note that the frame 820 does not have reinforcement.
- FIG. 122 is a plan view of the frame 820 shown in FIG.
- FIG. 123 is a cross-sectional view taken along the line A1-A1 of the frame 820 shown in FIG.
- FIG. 124 is a cross-sectional view taken along a line A2-A2 of the frame 820 shown in FIG.
- the filling member 825 is disposed on the inside of the frame 820 without a gap.
- the filling member 825 is bonded to the inner surface of the frame 820.
- the cross-sectional height of the frame 820 is defined as the distance between the bottom wall 822 a of the first structural member 822 and the top wall 823 a of the second structural member 823.
- the height of the cross section along the A1-A1 cutting line is 70 [mm].
- the cross-sectional height of the cross section along the A2-A2 cutting line is 110 [mm].
- Table 6 below shows the thicknesses of the first structural member 822 and the second structural member 823, the density of the filling member 825, the Young's modulus and the yield stress, and the total weight of the frame 820 in the reference example and each example. It shows the weight of the top plate 821) and the filling member 825. As shown in Table 6, the filling member 825 is not disposed in the reference example. Further, the Young's modulus of the filling member 825 of each example is 10 MPa in Example 1, 20 MPa in Example 2, 40 MPa in Example 3, and 100 MPa in Example 4. The relationship between the density of the filling member 825 and the yield stress and the Young's modulus according to this example is as shown in the graph of FIG.
- the present inventors fix one end (Y-axis direction + side) in the longitudinal direction of the frame according to each embodiment and reference example, and from the other end (Y-axis direction-side) to the frame
- a lid-like top plate 821 shown in FIG. 121 and FIG. 122 was caused to collide at an initial velocity of 12 [m / s].
- the present inventors observed deformation behavior in each example and a reference example, and computed reaction force and a stroke. The simulation results will be described below with reference to FIGS. 126 to 128.
- FIG. 126 is a diagram showing a list of deformation behavior of each example and reference example.
- deformation behaviors of the reference example, the first embodiment, the second embodiment, the third embodiment and the fourth embodiment are shown in order from the upper stage to the lower stage.
- the left side of each row shows the frame 820 after deformation
- the right side shows the distribution of the strain amount of the frame 820.
- the frame 820 according to each of the embodiments and the reference example after deformation is largely deformed as the Young's modulus of the filling member 825 is higher. Looking at the amount of strain of the frame 820 according to each example and reference example shown on the right side of each step in FIG.
- the frame 820 is deformed in a wider area as the Young's modulus of the filling member 825 is higher.
- the frame 820 absorbs collision energy by deforming the collision energy as deformation energy. That is, as the Young's modulus of the filling member 825 is higher, the frame 820 disperses in more regions and absorbs collision energy. Therefore, as the Young's modulus of the filling member 825 becomes higher, it is possible to make the collision energy less likely to be concentrated at one point and to make it difficult to cause the buckling. Moreover, it turns out that all deform
- FIG. 127 is a graph showing the reaction force and the stroke at the time of deformation of each example and reference example.
- the reaction force is highest at the beginning when the stroke is near zero, and decreases as the reaction force increases and decreases as the stroke increases. After that, after the reaction force temporarily increases, the reaction force sharply decreases and becomes zero. Further, in any of the embodiments and the reference example, the stroke starts to decrease at the timing when the reaction force sharply decreases, and a part of the deformation returns to the original state. Comparing the graphs of each example and reference example, the higher the Young's modulus of the filling member 825, the higher the reaction force at the same stroke.
- the frame 820 can be deformed tenaciously.
- the higher the Young's modulus of the filling member 825 the shorter the final stroke. That is, as the Young's modulus of the filling member 825 is higher, the frame 820 can absorb collision energy with a shorter stroke.
- FIG. 128 is a graph showing the collision energy absorption amount (Energy Absorption; EA (kJ)) of each example and reference example. 128, in the order from left to right, in the reference example, the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment, E. A. It is shown.
- the Young's modulus of the filling member As described above, as the Young's modulus of the filling member is high, as described in the above-mentioned embodiment, buckling is less likely to occur, and the filler can be deformed tenaciously and can absorb collision energy with a short stroke. That is, the higher the Young's modulus of the filling member, the better the collision safety performance of the frame. In addition, when the Young's modulus of the filling member is 20 MPa or more, the frame can exhibit sufficient collision safety performance.
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Abstract
Description
本発明の一実施形態に係る中空の部材は、様々な構造部材として利用可能である。本明細書では、その一例として、一実施形態に係る中空の部材が、車両用構造部材として車両用フレームに利用される場合について説明する。以下では、車両用フレームを、単にフレームと記載する。
第1の実施形態は、第2の金属板に密着して、曲げ誘起部に樹脂材が配置される形態である。
図2は、本発明の第1の実施形態に係るフレーム1の一例の概略構成を示す斜視図である。本明細書におけるフレーム1は、中空の部材の一例である。なお、当該中空の部材は、例えば、自動車のフロントサイドメンバ、リアサイドメンバに使用される。フロントサイドメンバは、後端部を構成するフロントサイドメンバリア、および当該後端部よりも前側の部分を構成するフロントサイドメンバフロントを含む。リアサイドメンバは、後端部を構成するリアサイドメンバリア、および当該後端部よりも前側の部分を構成するリアサイドメンバフロントを含む。また当該中空の部材は、自動車のピラーにも使用される。ピラーは、例えば、フロントピラー(Aピラー)、センターピラー(Bピラー)、リアピラー(Cピラー、Dピラー)、フロントピラーロア(Aピラーロア)を含む。また、当該中空の部材は、フロアレインフォースメント、フロアクロスメンバ、バンパーレインフォースメント、サイドシル、ルーフサイドレール、ルーフセンターレインフォースメント、クラッシュボックス、トンネル等にも使用できる。また、当該中空の部材は、自動車のみならず、他の車両および自走可能な機械にも適用可能である。他の車両および自走可能な機械には、例えば、二輪車両、バスまたは牽引車等の大型車両、トレーラー、鉄道車両、建設機械、鉱山機械、農業機械、一般機械、航空機および船舶等が含まれる。
図5は、本実施形態に係るフレーム1の一例のZ軸方向に直交する断面における断面図である。なお、図5に示す断面図は、図2に示したI-I切断線における中空部材10の断面図に相当する。図5に示すように、中空部材10には2つの屈曲部6Aと6Bがある。屈曲部6Aは、底壁部2aが曲げ内側となるように、底壁部2a方向に屈曲する。屈曲部6Bは、天壁部3aが曲げ内側となるように、天壁部3a方向に屈曲する。これらの屈曲部6A、6Bは、フレーム1における曲げ誘起部に相当する。
LFL:中空部材10のY軸方向(長手方向)の長さ。
DFL1:中空部材10の衝突側の端部におけるX軸方向の断面寸法。
DFL2:中空部材10の他端部におけるX軸方向の断面寸法。
LR:レインフォースメント4の長手方向の長さ。
SFL:屈曲部6の長手方向前後における第2の構造部材3のオフセット長さ。
LFMA、LFMB:充填部材5Aおよび5BのY軸方向の長さ。
以上、本実施形態に係る充填部材5Aおよび5Bの配置について説明した。なお、充填部材5の配置は、図6および図7に示した例に限定されない。以下、充填部材5の他の配置例について説明する。
第1の配置例では、レインフォースメント4に密着して配置した充填部材510により、レインフォースメント4の面外変形を抑制する。レインフォースメント4の面外変形を抑制できれば、レインフォースメント4がつながる壁部(例えば側壁部2b)の面外変形を抑制できる。その結果中空部材10の断面変形を抑制できる。
第2の配置例では、レインフォースメント4とレインフォースメント4に対向する壁部(例えば底壁部2a)とを充填部材511がつなぐ。充填部材511を介してレインフォースメント4とレインフォースメント4に対向する壁部が互いを拘束するため、レインフォースメント4とレインフォースメント4に対向する壁部との面外変形を抑制できる。更に、レインフォースメント4の面外変形を抑制できるため、レインフォースメント4がつながる壁部の面外変形も抑制できる。その結果、中空部材10の断面変形を抑制できる。
第3の配置例では、レインフォースメント4とレインフォースメント4がつながる壁部とを充填部材512がつなぐ。レインフォースメント4とレインフォースメント4がつながる壁部とが充填部材512で拘束されるため、レインフォースメント4とレインフォースメント4がつながる壁部とがなす角が固定される。その結果、中空部材10の断面変形を抑制できる。
第2の実施形態は、金属部材の底壁又は天壁の少なくともいずれかの内面に密着して、曲げ誘起部に樹脂材が配置される形態である。
(フレームの構成要素)
図11は、本発明の第2の実施形態に係るフレーム1の一例の概略構成を示す斜視図である。図11に示すように、本実施形態に係るフレーム1は、第1の構造部材2、第2の構造部材3、および充填部材5(5A、5B)を備える。本実施形態に係る中空部材10は、第1の構造部材2および第2の構造部材3により形成される。図11に示したフレーム1の構成は、レインフォースメント4を有しない点および充填部材5の配置を除き、第1の実施形態について図2~図4を参照して説明した通りである。以下、本実施形態に係るフレーム1の内部における、充填部材5の配置の一例について説明する。
図12は、本実施形態に係るフレーム1の一例のZ軸方向に直交する断面を示す断面図である。なお、図12に示す断面図は、図11に示したIV-IV切断線における中空部材10の断面図に相当する。図12に示すように、中空部材10には、底壁部2aが曲げ内側となる方向に屈曲する屈曲部6A、および天壁部3aが曲げ内側となる方向に屈曲する屈曲部6Bが設けられている。本実施形態に係る充填部材5Aおよび5Bは、図11および図12に示すように、底壁部2a又は天壁部3aにおける屈曲部6Aおよび屈曲部6Bが設けられた部分の内面に密着して配置される。これらの屈曲部6は、フレーム1における曲げ誘起部に相当する。
LFL:中空部材10のY軸方向(長手方向)の長さ。
DFL1:中空部材10の衝突側の端部におけるX軸方向の断面寸法。
DFL2:中空部材10の他端部におけるX軸方向の断面寸法。
SFL:屈曲部6の長手方向前後における第2の構造部材3のオフセット長さ。
LFMA、LFMB:充填部材5Aおよび5BのY軸方向の長さ。
以上、本実施形態に係る充填部材5Aおよび5Bの配置について説明した。なお、充填部材5の配置は、図11~図14に示した例に限定されない。以下、充填部材5の他の配置例について説明する。
図15は、本実施形態に係る充填部材の第1の配置例を説明するためのフレーム1の断面図である。なお、図15に示す断面図は、図12に示したフレーム1のV-V切断線におけるフレーム1の断面に相当する。
図16は、本実施形態に係る充填部材の第2の配置例を説明するためのフレーム1の断面図である。なお、図16に示す断面図は、図12に示したフレーム1のV-V切断線におけるフレーム1の断面に相当する。
また、本実施形態に係る充填部材は、稜線部2dの少なくともいずれか一方の内側に局所的に密着(好ましくは接着)して配置されてもよい。図17は、本実施形態に係る充填部材の第3の配置例を説明するためのフレーム1の断面図である。なお、図17に示す断面図は、図12に示したフレーム1のV-V切断線におけるフレーム1の断面に相当する。
図20は、本実施形態に係る充填部材の第4の配置例を説明するためのフレーム1の断面図である。なお、図20に示す断面図は、図12に示したフレーム1のV-V切断線におけるフレーム1の断面に相当する。
第3の実施形態は、金属部材の一対の側壁部の少なくともいずれかの内面に密着して、曲げ誘起部に樹脂材が配置される形態である。
<4.1.フレームの構成>
(フレームの構成要素)
図21は、本発明の第3の実施形態に係るフレーム1の一例の概略構成を示す斜視図である。図21に示すように、本実施形態に係るフレーム1は、第1の構造部材2、第2の構造部材3、および充填部材5(5A、5B)を備える。本実施形態に係る中空部材10は、第1の構造部材2および第2の構造部材3により形成される。図21に示したフレーム1の構成は、レインフォースメント4を有しない点および充填部材5の配置を除き、第1の実施形態について図2~図4を参照して説明した通りである。以下、本実施形態に係るフレーム1の内部における、充填部材5の配置の一例について説明する。
図22は、本実施形態に係るフレーム1の一例のZ軸方向に直交する断面を示す断面図である。なお、図22に示す断面図は、図21に示したVII-VII切断線における中空部材10の断面図に相当する。図22に示すように、中空部材10には、底壁部2aが曲げ内側となる方向に屈曲する屈曲部6A、および天壁部3aが曲げ内側となる方向に屈曲する屈曲部6Bが設けられている。これらの屈曲部6は、フレーム1における曲げ誘起部に相当する。本実施形態に係る充填部材5Aおよび5Bは、図21および図22に示すように、側壁部2bにおける屈曲部6Aおよび屈曲部6Bが設けられた部分の内面に密着して配置される。
LFL:中空部材10のY軸方向(長手方向)の長さ。
DFL1:中空部材10の衝突側の端部におけるX軸方向の断面寸法。
DFL2:中空部材10の他端部におけるX軸方向の断面寸法。
SFL:屈曲部6の長手方向前後における第2の構造部材3のオフセット長さ。
LFMA、LFMB:充填部材5Aおよび5BのY軸方向の長さ。
以上、本実施形態に係る充填部材5Aおよび5Bの配置について説明した。なお、充填部材5の配置は、図21~図23に示した例に限定されない。以下、充填部材5の他の配置例について説明する。
図24は、本実施形態に係る充填部材の第1の配置例を説明するためのフレーム1の断面図である。なお、図24に示す断面図は、図22に示したフレーム1のVIII-VIII切断線におけるフレーム1の断面に相当する。
図25は、本実施形態に係る充填部材の第2の配置例を説明するためのフレーム1の断面図である。なお、図25に示す断面図は、図22に示したフレーム1のVIII-VIIIにおけるフレーム1の断面に相当する。
図26は、本実施形態に係る充填部材の第3の配置例を説明するためのフレーム1の断面図である。なお、図26に示す断面図は、図22に示したフレーム1のVIII-VIIIにおけるフレーム1の断面に相当する。
図27は、本実施形態に係る充填部材の第4の配置例を説明するためのフレーム1の断面図である。なお、図27に示す断面図は、図22に示したフレーム1のVIII-VIIIにおけるフレーム1の断面に相当する。
また、本実施形態に係る充填部材533cは、稜線部2dの少なくともいずれか一方の内側に局所的に密着(好ましくは接着)して配置されてもよい。図28は、本実施形態に係る充填部材の第5の配置例を説明するためのフレーム1の断面図である。なお、図28に示す断面図は、図22に示したフレーム1のVIII-VIIIにおけるフレーム1の断面に相当する。
第4の実施形態は、金属部材を形成する第1の金属板に設けられた穴部を貫通して、曲げ誘起部に樹脂材が配置される形態である。
図30は、本発明の第4の実施形態に係るフレーム100の一例の構成例を示す部分断面図である。
次に、充填部材50の構成の変形例を説明する。
次に、本実施形態の第2の例として、上述した第1の例に係る中空部材110および充填部材50の構成を適用させた、フレーム1の具体的な構成について説明する。
次に、中空部材10に設けられる曲げ誘起部の例について説明する。上記の各実施形態では、曲げ誘起部である屈曲部6について説明したが、本発明はかかる例に限定されない。曲げ誘起部は2つの特徴の少なくとも片方を備えている。
穴部は、全塑性モーメント変化部と形状変化部の特徴を兼ね備える。図42は、一実施形態に係る中空部材に設けられる穴部の例を説明するためのフレーム1の断面図である。図42に示すように、底壁部2aには穴部60が設けられている。穴部60が設けられた部分における中空部材10の全塑性モーメントは、穴部60が設けられた部分の前後(中空部材10の長手方向についての)における部分の中空部材10の全塑性モーメントよりも低い。また、穴部60で面(底壁部2a)の一部が断絶しているため曲げこわさが低い。したがって、図42に示す衝突荷重Fが中空部材10に入力された場合、フレーム1は、穴部60が設けられた部分において、穴部60が曲げ内側となるように屈曲する。そのため、レインフォースメント4は少なくとも穴部60が設けられた底壁部2aに対向する位置に設けられ、充填部材5はレインフォースメント4に密着して配置される。これにより、衝突荷重Fの入力により穴部60の近傍において屈曲が生じた場合に、レインフォースメント4の面外変形を抑制し、レインフォースメント4の座屈を抑制することができる。
穴部は、全塑性モーメント変化部と形状変化部の特徴を兼ね備える。図50は、一実施形態に係る中空部材に設けられるビード部の例を説明するためのフレーム1の断面図である。なお、ビード部61は、一実施形態における凹部の一例である。図50に示すように、底壁部2aにはビード部61が設けられている。ビード部61が設けられた部分における中空部材10の全塑性モーメントは、ビード部61が設けられた部分の前後(中空部材10の長手方向についての)における部分の中空部材10の全塑性モーメントよりも低い。また、凹部が潰れて曲げの起点になりやすい。したがって、図50に示す衝突荷重Fが中空部材10に入力された場合、フレーム1はビード部61が設けられた部分において、ビード部61が曲げ内側となるように屈曲する。そのため、レインフォースメント4は少なくともビード部61が設けられた底壁部2aに対向する位置に設けられ、充填部材5はレインフォースメント4に密着して配置される。これにより、衝突荷重Fの入力によりビード部61の近傍において屈曲が生じた場合に、レインフォースメント4の面外変形を抑制し、レインフォースメント4の座屈を抑制することができる。
凸部は、形状変化部の特徴を備える。図59は、一実施形態に係る中空部材に設けられる凸部の例を説明するためのフレーム1の断面図である。図59に示すように、底壁部2aには凸部62が設けられている。凸部62が設けられた部分は形状変化部である。図59に示す衝突荷重Fが中空部材10に入力された場合、中空部材10の長手方向における凸部62の縁8aまたは8bの少なくともいずれかにおいて、凸部62が曲げ内側となるように屈曲する。そのため、レインフォースメント4は少なくとも凸部62並びに凸部62の前後の領域8aおよび8bに対向する位置に設けられ、充填部材5はレインフォースメント4に密着して配置される。これにより、衝突荷重Fの入力により凸部62の近傍において屈曲が生じた場合に、レインフォースメント4の面外変形を抑制し、レインフォースメント4の座屈を抑制することができる。
板厚変化部・薄肉部は、全塑性モーメント変化部と形状変化部の特徴を兼ね備える。図68は、一実施形態に係る中空部材に設けられる板厚変化部の一例を示す模式図である。ここでいう板厚変化部とは、中空部材10Dの長手方向において板厚が変化する部分を意味する。図68に示すように、中空部材10Dは、第1板厚部111および第2板厚部112を備える。第1板厚部111は中空部材10Dの端部側に設けられ、第2板厚部112は、中空部材10Dの長手方向に沿って第1板厚部111と連続して設けられる。第1板厚部111と第2板厚部112との間では、鋼板の板厚が異なる。板厚の大小関係については特に限定されないが、中空部材10D全体の曲げ剛性の確保の観点から、第2板厚部112の板厚が第1板厚部111の板厚よりも大きいことが好ましい。
異強度部と強度変化部は、全塑性モーメント変化部の特徴を備える。異強度部は、中空部材10の長手方向で中空部材10の降伏強度が変化する部分である。例えば、中空部材10の長手方向で降伏強度が変化する部分においては、周囲に比べ全塑性モーメントが小さい箇所がある。すなわち、異強度部は全塑性モーメント変化部である。従って、当該箇所で中空部材10の塑性変形が誘起される。強度変化部は、中空部材10の長手方向で中空部材10の降伏強度が変化する境界部分である。すなわち、強度変化部は全塑性モーメント変化部である。
なお、屈曲部を有する中空部材において、屈曲部の曲げ内側部分に上記の例に示した穴部等の曲げを誘起させるための部分がさらに設けられてもよい。図76は一実施形態に係る中空部材に設けられる屈曲部および穴部の組み合わせの例を説明するためのフレーム1の断面図である。図76に示すように、中空部材10には屈曲部6Aが設けられ、底壁部2aの曲げ内側部分6Aaには穴部64が設けられる。レインフォースメント4は少なくとも曲げ内側部分6Aaおよび穴部64に対向する位置に設けられ、充填部材5はレインフォースメント4に密着して配置される。これにより、衝突荷重Fの入力により、屈曲部6Aにおいて中空部材10をより確実に屈曲させることができる。
また、中空部材10に効果的な曲げ誘起部が設けられない場合であっても、レインフォースメント4に屈曲部、凹部、凸部、穴部、板厚変化部、薄肉部、異強度部および強度変化部が設けられれば、レインフォースメント4の屈曲部、凹部、凸部、穴部、板厚変化部、薄肉部、異強度部および強度変化部が曲げ誘起部になる。しかしながら、レインフォースメント4に曲げ誘起部が設けられても、中空部材10の曲げ誘起部に比べ、同じ条件であれば、曲げ誘起部としての効果は得られにくい。なぜなら、レインフォースメント4は中空部材10の内部にあるため、曲げ変形挙動への影響が小さいからである。
中空部材10の有する閉断面の形状の例について説明する。図80は、本発明の他の実施形態に係る中空部材10の第1の例の長手方向に直交する断面を示す断面図である。図80に示すように、中空部材10の閉断面は、X軸について対称な略六角形の形状を有する。このうち、第1の構造部材2のX軸方向に略直交する部分において、4つの頂点2d、2d、2f、2fが存在する。ここで、頂点2dの内角ang1が頂点2fの内郭ang2より小さい場合、頂点2dが稜線部2dとして定義される。すなわち、頂点2f、2fを含む、一対の稜線部2dに挟まれる部分が、底壁部2aと定義される。
第1~第4の実施形態において説明したように、充填部材5は、樹脂材の一例であり、フレーム1の曲げ誘起部に対応する箇所に配置される。以下では、曲げ誘起部と充填部材5の配置範囲の具体例について説明する。
まず、図83~図91を参照して、フレーム1(中空部材10)をZ軸方向から見たときの充填部材5の配置範囲について説明する。なお、以下の説明では、フレーム1の長手方向(Y軸方向)を「長手方向Y」と称し、フレーム1の高さ方向(X軸方向)を「高さ方向X」と称し、フレーム1の幅方向(Z軸方向)を「幅方向Z」と称する場合もある。
図83は、フレーム1に設けられた曲げ誘起部(屈曲部)と充填部材5の具体例を示す。図83に示すように、フレーム1の底壁部2aに、曲げ誘起部として、湾曲状の屈曲部6aが設けられている。この屈曲部6aは、フレーム1の底壁部2aが長手方向Yに沿って曲線状に湾曲した領域であり、当該屈曲部6aの位置でフレーム1の曲げ変形が誘起される。
図84は、フレーム1に設けられた曲げ誘起部(屈曲部)と充填部材5の別の具体例を示す。図84に示すように、フレーム1の底壁部2aに、曲げ誘起部として、角型の屈曲部6bが設けられている。この屈曲部6bは、フレーム1が所定位置で角型に折れ曲がった部分である。屈曲部6bの長手方向Yの両側の底壁部2aは平面状であり、これら平面状の底壁部2aが角度を成して交わる稜線部分が屈曲部6bを構成する。当該屈曲部6bの折れ曲がり位置でフレーム1の曲げ変形が誘起される。
図87は、フレーム1に設けられた曲げ誘起部(穴部)と充填部材5の具体例を示す。図87に示すように、フレーム1の底壁部2aに、曲げ誘起部として、穴部60が設けられている。この穴部60は、フレーム1の底壁部2aに貫通形成された開口である。YZ平面視において、穴部60の形状は、例えば、幅方向Zに延びる縦長の長方形状が好適であるが、その他にも、矩形状、多角形状、円形状、楕円形状など任意の形状であってもよい。当該穴部60でフレーム1の曲げ変形が誘起される。
図88は、フレーム1に設けられた曲げ誘起部(凹部)と充填部材5の具体例を示す。図88に示すように、フレーム1の底壁部2aに、曲げ誘起部として、凹部61が設けられている。この凹部61は、フレーム1の底壁部2aの一部が内側に向けて陥没形成された部分である。YZ平面視において、凹部61の形状は、例えば、幅方向Zに延びる縦長の長方形状が好適であるが、その他にも、矩形状、多角形状、円形状、楕円形状など任意の形状であってもよい。当該凹部61でフレーム1の曲げ変形が誘起される。
図89は、フレーム1に設けられた曲げ誘起部(凸部)と充填部材5の具体例を示す。図89に示すように、フレーム1の底壁部2aに、曲げ誘起部として、凸部62が設けられている。この凸部62は、フレーム1の底壁部2aの一部が外側に向けて突出形成された部分である。YZ平面視において、凸部62の形状は、例えば、幅方向Zに延びる縦長の長方形状が好適であるが、その他にも、矩形状、多角形状、円形状、楕円形状など任意の形状であってもよい。当該凸部62でフレーム1の曲げ変形が誘起される。
図90は、フレーム1に設けられた曲げ誘起部(板厚変化部)と充填部材5の具体例を示す。図90に示すように、フレーム1の底壁部2aに、曲げ誘起部として、板厚変化部113が設けられている。この板厚変化部113は、鋼板の板厚が異なる第1板厚部111と第2板厚部112との境目の部分であり、例えば、幅方向Zに直線状に設けられる。当該板厚変化部113でフレーム1の曲げ変形が誘起される。
図91は、フレーム1に設けられた曲げ誘起部(異強度部)と充填部材5の具体例を示す。図91に示すように、フレーム1の底壁部2aに、曲げ誘起部として、異強度部63が設けられている。この異強度部63は、フレーム1の底壁部2aの強度が部分的に低下した部分であり、例えば、幅方向Zに延びる帯状に設けられる。当該異強度部63でフレーム1の曲げ変形が誘起される。
続いて、図92~図94を参照して、フレーム1(中空部材10)をX軸方向から見たときの充填部材5の配置範囲について説明する。
続いて、図95~図98を参照して、フレーム1(中空部材10)をY軸方向から見たときの充填部材5の配置範囲について説明する。なお、以下では一例として、中空部材10の断面形状が円形又は楕円である場合について説明する。図95~図98はそれぞれ、Y軸方向に直交する断面におけるフレーム1及び充填部材5の具体例を示す断面図である。
次に、本発明の実施例について説明する。
本発明の効果を確認するために、以下で説明する実施例では、レインフォースメントおよび充填部材によるフレームの衝突安全性能の向上効果について検証した。なお、以下の実施例は本発明の効果を検証するために行ったものに過ぎず、本発明が以下の実施例に限定されるものではない。
LFL=500
DFL1=70
DFL2=90
LR=240
SFL=60
LFMA=70
LFMB=70
本発明の効果を確認するために、以下で説明する実施例では、充填部材5によるフレームの衝突安全性能の向上効果について検証した。なお、以下の実施例は本発明の効果を検証するために行ったものに過ぎず、本発明が以下の実施例に限定されるものではない。また、各実施例に係る充填部材については、特に区別しない限り、「充填部材5」と称して説明する。
LFL=500
DFL1=70
DFL2=90
SFL=60
LFMA=70
LFMB=70
実施例1:図13に示す配置(a=10mm、b1=15mm、b2=15mm)
実施例2:図15に示す配置(a=10mm)
実施例3:図15に示す配置(a=3mm)
実施例4:図15に示す配置(a=30mm)
実施例5:図15に示す配置(a=50mm)
実施例6:図16に示す配置(a1、a2、c1、c2=10mm)
実施例7:図17に示す配置(a、c=10mm)
実施例8:図18に示す配置(a1、a2=10mm)
実施例9:図19に示す配置(a=10mm)
実施例10:図20に示す配置(a1、a2、a3=10mm)
本発明の効果を確認するために、以下で説明する実施例では、充填部材5によるフレームの衝突安全性能の向上効果について検証した。なお、以下の実施例は本発明の効果を検証するために行ったものに過ぎず、本発明が以下の実施例に限定されるものではない。また、各実施例に係る充填部材については、特に区別しない限り、「充填部材5」と称して説明する。
LFL=500
DFL1=70
DFL2=90
SFL=60
LFMA=70
LFMB=70
実施例1:図23に示す配置(a=10mm)
実施例2:図24に示す配置(a1、a2=10mm)
実施例3:図25に示す配置(a1、a2=10mm、b1~b4=15mm)
実施例4:図26に示す配置(a1~a3=10mm)
実施例5:図27に示す配置(a1、a2、c1、c2=10mm)
実施例6:図28に示す配置(a、c=10mm)
実施例7:図29に示す配置(a=10mm)
実施例8:図29に示す配置(a=3mm)
実施例9:図29に示す配置(a=30mm)
実施例10:図29に示す配置(a=50mm)
本発明の効果を確認するために、以下で説明する実施例では、上記実施形態に係る充填部材(例えば、樹脂材)の中空部材(例えば、金属部材)に対する密着性の向上効果について検証した。なお、以下の実施例は本発明の効果を検証するために行ったものに過ぎず、本発明が以下の実施例に限定されるものではない。
引張強度:1180MPa
サイズ :幅50mm、長さ150mm、厚さ1.4mm
表面処理:合金化溶融亜鉛めっき
材質:ポリウレタン
厚さ:10mm
本発明の効果を確認するために、以下で説明する実施例では、充填部材5によるフレームの衝突安全性能の向上効果について検証した。なお、以下の実施例は本発明の効果を検証するために行ったものに過ぎず、本発明が以下の実施例に限定されるものではない。また、各実施例に係る充填部材については、特に区別しない限り、「充填部材5」と称して説明する。
実施例1:凹部、LP=0
実施例2:凹部、LP=9
実施例3:凹部、LP=18
実施例4:凹部、LP=36(断面高さHの2分の1に相当)
実施例5:凹部、LP=93
実施例6:板厚変化部、LP=0
実施例7:板厚変化部、LP=9
実施例8:板厚変化部、LP=18
実施例9:板厚変化部、LP=36(断面高さHの2分の1に相当)
実施例10:板厚変化部、LP=93
参考例1:凹部、充填部材なし
参考例2:板厚変化部、充填部材なし
以下の実施例では、曲げ誘起部として機能する全塑性モーメント変化部について検証した。全塑性モーメント変化部が曲げ誘起部として機能するとは、全塑性モーメント変化部において曲げ変形が誘起されることを指す。なお、以下の実施例は、曲げ誘起部として機能する全塑性モーメント変化部を検証するために行ったものに過ぎず、本発明が以下の実施例に限定されるものではない。
参考例:1.0
実施例1:0.90
実施例2:0.95
実施例3:0.90
以下の実施例では、フレームの衝突安全性能を十分に向上させることが可能な充填部材のヤング率について検証した。なお、以下の実施例は、充填部材のヤング率を検証するために行ったものに過ぎず、本発明が以下の実施例に限定されるものではない。
2 第1の構造部材
2a 底壁部
2b 側壁部
2c フランジ部
2d、2e 稜線部
3、30 第2の構造部材
3a 天壁部
30a 底壁部
30b 側壁部
3c、30c 接合部
4 レインフォースメント
4a 主面部
4b 接合部
5 充填部材
6 屈曲部(曲げ誘起部)
9 第3の構造部材
10、110 中空部材
20 壁部
21 壁穴
22 穴縁端
51 第1充填部分
52 第2充填部分
53 第3充填部分
60、64 穴部
61 凹部
62 凸部
63 異強度部
Claims (20)
- 長手方向の一部に曲げ誘起部を有する、中空の金属部材と、
ヤング率20MPa以上の樹脂からなり、前記金属部材に密着して前記曲げ誘起部に配置された樹脂材と、
を備える中空の部材。 - 前記金属部材は、底壁部と、前記底壁部の両端から起立した一対の側壁部と、前記底壁部に対向する天壁部とを有し、前記底壁部、前記一対の側壁部および前記天壁部により閉断面を形成する、請求項1に記載の中空の部材。
- 前記樹脂材は、前記底壁部又は前記天壁部の少なくともいずれかの内面に密着して配置される、請求項2に記載の中空の部材。
- 前記樹脂材は、前記一対の側壁部の少なくともいずれかの内面に密着して配置される、請求項2又は3に記載の中空の部材。
- 前記金属部材の内側において前記金属部材を形成する第1の金属板と接合して第2の金属板が配置される、請求項1~4のいずれか一項に記載の中空の部材。
- 前記樹脂材は、前記第2の金属板に密着して配置される、請求項5に記載の中空の部材。
- 前記金属部材を形成する第1の金属板は穴部を有し、前記樹脂材は発泡樹脂からなり、前記樹脂材は前記穴部を貫通して前記第1の金属板の外面と内面の両面に密着して配置される、請求項1~6のいずれか一項に記載の中空の部材。
- 前記穴部の穴縁端は、前記金属部材を形成する第1の金属板よりも前記金属部材の内方に位置する、請求項7に記載の中空の部材。
- 前記穴部は、前記金属部材を形成する第1の金属板の外側から内側に向かって前記穴部の穴縁端が突出するバーリング穴である、請求項8に記載の中空の部材。
- 前記穴部には、前記金属部材を形成する第1の金属板よりも前記金属部材の内方に窪んだ窪み部が設けられ、
前記穴部は、前記窪み部の内部に設けられる、請求項7~9のいずれか一項に記載の中空の部材。 - 前記曲げ誘起部は、前記金属部材の全塑性モーメントが前記長手方向で変化する部分である、請求項1~10のいずれか一項に記載の中空の部材。
- 前記曲げ誘起部は、前記金属部材の断面の重心により形成される前記長手方向に沿った前記重心の軌跡の曲率半径が260mm以下である部分である、請求項1~11のいずれか一項に記載の中空の部材。
- 前記曲げ誘起部は、板厚変化部である、請求項1~11のいずれか一項に記載の中空の部材。
- 前記曲げ誘起部は、凹部が設けられた部分である、請求項1~11のいずれか一項に記載の中空の部材。
- 前記曲げ誘起部は、凸部が設けられた部分である、請求項1~11のいずれか一項に記載の中空の部材。
- 前記曲げ誘起部は、穴部が設けられた部分である、請求項1~11のいずれか一項に記載の中空の部材。
- 前記樹脂材は、前記曲げ誘起部、及び前記曲げ誘起部の前記長手方向両側の周辺部分を覆うように配置される、請求項1~16のいずれか一項に記載の中空の部材。
- 前記曲げ誘起部から前記樹脂材の前記長手方向の端部までの距離が、前記金属部材の断面高さの2分の1以下となる範囲内で、前記樹脂材は、前記曲げ誘起部、及び前記曲げ誘起部の前記長手方向両側の周辺部分を覆うように配置される、請求項17に記載の中空の部材。
- 前記樹脂材は、前記金属部材の断面において、前記断面の重心から前記曲げ誘起部に向かう方向で定義される前記断面の高さ方向で前記断面を2等分する境界より前記曲げ誘起部のある側に配置される、請求項1~18のいずれか一項に記載の中空の部材。
- 前記樹脂材は、前記曲げ誘起部の一部に配置され、前記曲げ誘起部の他の一部に配置されない、請求項1~19のいずれか一項に記載の中空の部材。
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