JP2015131584A - Vehicle body member fastening structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body member fastening structure which prevents cracks from occurring in an area around a fastening hole during a collision of a vehicle, in particular a lateral collision, even if a tensile load acts on the area around the fastening hole.SOLUTION: An impact beam 20 made of a fiber-reinforced resin is disposed in a vehicle side door 10. A longitudinal end part of the impact beam 20 is obliquely cut to form an open portion 22 and a connection member 30 made of a fiber-reinforced resin is attached to the open portion 22. A third fastening hole 38 is formed at a fastening part 32 of the connection member 30, and a second fastening hole 26 is formed at an attachment part 24 of the impact beam 20. A first fastening hole 28 is formed in an attached part 46 of a door inner panel 12. Bolts 50 are inserted into the first fastening hole 28, the second fastening hole 26, and the third fastening hole 38 to be fastened by nuts 52. A rear surface of an intermediate part 34B of the connection member 30 makes line contact with an edge 36A of an outer wall end part 36 of the impact beam 20.

Description

  The present invention relates to a member fastening structure for a vehicle body.

  In many cases, a pipe-shaped reinforcing member called an impact beam is disposed inside the side door for a vehicle with the longitudinal direction of the vehicle in the longitudinal direction. In this case, when the vehicle collides sideways, the collision load is input to the impact beam, and then transmitted to pillars such as a front pillar and a center pillar disposed before and after the vehicle side door. Thereby, the penetration | invasion to the vehicle interior space of the vehicle side door is suppressed or prevented.

  Here, Patent Document 1 below discloses a structure in which a fastening hole is formed in two members made of fiber reinforced resin, and the fastening member is inserted into the fastening hole to fasten the two members. Has been. Briefly, a reinforcing portion in which a film-like reinforcing fiber material is impregnated with a matrix resin is formed on the surface layer around the fastening hole of the member. Thereby, the periphery of the fastening hole is reinforced, and even if a tensile load acts on the periphery of the fastening hole via the fastening member, the periphery of the fastening hole is not damaged.

JP 2012-35442 A

  Then, it is possible to apply the technique described in the said patent document 1 to the fastening structure to the door inner panel of an impact beam. However, unlike the front part of the vehicle body, the vehicle body side part has a small number of vehicle body components that serve to absorb energy at the time of collision, and therefore a relatively large collision load is input to the vehicle side door at the time of a side collision. For this reason, it is conceivable that a relatively large stress concentration occurs around the fastening hole and a crack occurs.

  In consideration of the above facts, the present invention can suppress or prevent cracks from occurring around a fastening hole even when a tensile load acts around the fastening hole at the time of a vehicle collision, particularly at a side collision. The object is to obtain a member fastening structure for a vehicle body.

  The member fastening structure for a vehicle body according to the first aspect of the present invention includes a panel-like first vehicle body constituent member having a mounted portion in which a first fastening hole is formed, an open portion opened to the outside, and the first A beam-shaped second vehicle body component member that has a mounting portion formed with a second fastening hole that overlaps the fastening hole, and at least the mounting portion is made of fiber reinforced resin, and a third that overlaps the second fastening hole. A fiber reinforced resin having a fastening part in which a fastening hole is formed and a connecting part for connecting the fastening part and the open part so as to cover an edge of the open part facing the fastening part. And a fastening member inserted into the first fastening hole, the second fastening hole, and the third fastening hole to fasten the fastening part to the attached part with the attachment part interposed therebetween, It has.

  A vehicle body member fastening structure according to a second aspect of the present invention is the vehicle body member fastening structure according to the first aspect, wherein the connecting portion is fixed to an end portion of the open portion facing the fastening portion. And an intermediate portion that connects the fixing portion and the fastening portion.

  According to a third aspect of the present invention, there is provided the vehicle body member fastening structure according to the second aspect, wherein the intermediate portion is disposed perpendicular to the fixed portion, and the back surface of the intermediate portion is There is line contact with the edge.

  The member fastening structure for a vehicle body according to a fourth aspect of the present invention is the invention according to the second or third aspect, wherein the intermediate portion and the fastening portion are one or more side wall portions orthogonal to each other. Are connected to each other.

  The member fastening structure for a vehicle body according to a fifth aspect of the present invention is the invention according to any one of the second to fourth aspects, wherein the fixing portion faces the fastening portion in the open portion. It is glued to the end of

  The member fastening structure for a vehicle body according to a sixth aspect of the present invention is the invention according to any one of the first to fifth aspects, wherein the fastening portion is bonded to the mounting portion with an adhesive. .

  A member fastening structure for a vehicle body according to a seventh aspect of the present invention is the invention according to any one of the first to sixth aspects, wherein the connecting portion has a direction from the fastening portion toward the fixing portion. The first rib is formed extending in the vertical direction and arranged perpendicular to the fastening portion and the connecting portion.

  According to an eighth aspect of the present invention, in the member fastening structure for a vehicle body according to the seventh aspect of the invention, the connecting portion extends in a direction from the fastening portion toward the fixed portion, and the connecting portion and the opening. The 2nd rib arrange | positioned perpendicularly | vertically with respect to the inner wall surface of the part facing the said fastening part in the part is formed.

  A vehicle body member fastening structure according to a ninth aspect of the present invention is the vehicle body member fastening structure according to any one of the first to eighth aspects, wherein the thickness of the coupling portion of the coupling member is equal to that of the fastening portion. It is set to be thicker than the plate thickness.

  A member fastening structure for a vehicle body according to a tenth aspect of the present invention is the invention according to any one of the first to ninth aspects, wherein the first vehicle body constituting member is made of metal.

  The member fastening structure for a vehicle body according to the invention of claim 11 is the invention according to claim 10, wherein the first vehicle body component member is a door inner panel disposed on the vehicle width direction inside of the vehicle side door. In addition, the second vehicle body component member is disposed in the vehicle side door along the vehicle front-rear direction, and a longitudinal end portion of the second vehicle body component member is connected to the door inner member by the fastening member via the connecting member. The impact beam is fixed to the panel.

  According to the first aspect of the present invention, when the beam-shaped second vehicle body component member made of fiber reinforced resin is stretched against the collision load at the time of a vehicle collision, the attachment portion of the second vehicle body component member is A relatively large tensile load acts around the formed second fastening hole.

  Here, in this invention, the connection member made from a fiber reinforced resin is provided separately from the 2nd vehicle body structural member. Furthermore, the connecting member includes a fastening portion in which a third fastening hole that overlaps the second fastening hole is formed, and a connecting portion that connects the fastening portion and an open portion provided in the second vehicle body constituent member. Yes. For this reason, the tensile load transmitted from the fastening member to the periphery of the second fastening hole of the second vehicle body component member is transmitted to the tensile load transmitted to the periphery of the second fastening hole and the periphery of the third fastening hole. It is dispersed and transmitted to the tensile load. And the tensile load transmitted to the fastening part side of the connecting member is transmitted to the side facing the fastening part in the open portion of the second vehicle body constituent member via the connecting part. In addition, in the present invention, the fastening portion and the open portion of the second vehicle body component member are connected so that the edge (ridgeline) on the side facing the fastening portion in the open portion is covered, so that the tension is applied via the edge. Load is transmitted reliably. As described above, according to the present invention, since the load transmission path is two paths, the stress concentration generated around the second fastening hole of the second vehicle body constituting member is alleviated, and initial crack generation is suppressed or prevented.

  According to this invention of Claim 2, the connection member is provided with the fastening part, the fixing | fixed part, and the intermediate part. Thereby, the tensile load distributed to the fastening part side of the connecting member is transmitted to the fixed part through the intermediate part. For this reason, the load transmission amount can be adjusted by changing the structure of the intermediate portion.

  According to the third aspect of the present invention, the intermediate portion is disposed perpendicular to the fixed portion, and the back surface of the intermediate portion is in line contact with the edge of the open portion of the second vehicle body component. Good load transmission efficiency.

  According to the fourth aspect of the present invention, since the intermediate portion and the fastening portion are connected to each other by one or more side wall portions orthogonal to each other, the side wall portion is crushed by the second vehicle body component member. Resist. That is, the side wall serves as a bulkhead (bamboo node). For this reason, it can suppress or prevent that a 2nd vehicle body structural member collapses a cross section.

  According to the fifth aspect of the present invention, since the fixing portion of the connecting member is bonded to the end portion of the opening portion of the second vehicle body constituent member facing the fastening portion with the adhesive, the connecting member is the second member. It is firmly fixed by the end portion on the side facing the fastening portion in the open portion of the vehicle body constituent member.

  According to the sixth aspect of the present invention, since the fastening portion of the connecting member is bonded to the mounting portion of the second vehicle body constituent member with the adhesive, the connecting member is more firmly attached to the mounting portion side of the second vehicle body constituent member. It is fixed and the rigidity is improved.

  According to the seventh aspect of the present invention, since the first rib extending in the direction from the fastening portion toward the fixing portion and arranged perpendicular to the fastening portion and the communication portion is formed, the rigidity of the connecting member is increased. Be improved.

  According to this invention of Claim 8, in addition to a 1st rib, a 2nd rib is provided in a connection member. The second rib extends in a direction from the fastening portion toward the fixing portion, and is disposed perpendicular to the inner wall surface on the side facing the fastening portion in the connecting portion and the open portion. Therefore, when the second rib is seen together with the first rib, the first rib is disposed perpendicular to the fastening portion and the intermediate portion of the connecting member, and the intermediate portion of the connecting member and the open portion of the second vehicle body component member The second rib is disposed perpendicular to the inner wall surface on the side facing the fastening portion. Therefore, under a situation where a collision load is input to the second vehicle body structural member, a load transmission path passing through the first rib and the second rib is newly formed.

  According to the ninth aspect of the present invention, since the plate thickness of the connecting portion in the connecting member is set to be thicker than the plate thickness of the fastening portion, the rigidity of the connecting member is increased accordingly.

  According to the tenth aspect of the present invention, at least the mounting portion of the beam-shaped second vehicle body constituting member is made of fiber reinforced resin, and the connecting member is also made of resin. On the other hand, the panel-like first vehicle body constituting member is made of metal. Therefore, the occurrence of cracks on the fiber reinforced resin member side between members of different materials in the vehicle body structure is effectively suppressed or prevented.

  According to the eleventh aspect of the present invention, the vehicle body member fastening structure according to the present invention is applied to the vehicle side door. Specifically, the end portion in the longitudinal direction of the impact beam is fastened by the fastening member to the attached portion of the metal door inner panel via the connection member made of fiber reinforced resin.

  Here, when the vehicle collides side, the collision body tries to deform the vehicle side door inward in the vehicle width direction. At this time, the impact beam disposed along the vehicle front-rear direction in the vehicle side door stretches, thereby suppressing or preventing deformation of the door inner panel inward in the vehicle width direction. When the impact beam is stretched, a tensile load acts around each of the first fastening hole, the second fastening hole, and the third fastening hole through the fastening member. Thereby, the tensile load transmitted to the periphery of the third fastening hole is transmitted to the side facing the fastening portion in the open portion of the second vehicle body constituent member through the connecting member. Thereby, a load is disperse | distributed and the tensile load which acts around the 2nd fastening hole is reduced. As a result, the stress concentration generated around the second fastening hole is alleviated.

  As described above, the vehicle body member fastening structure according to the present invention according to the first aspect of the present invention is provided around the fastening hole even when a tensile load acts around the fastening hole at the time of a vehicle collision, particularly at the time of a side collision. It has the outstanding effect that it can suppress or prevent that a crack generate | occur | produces.

  The member fastening structure for a vehicle body according to the second aspect of the present invention has an excellent effect that the load distribution function can be changed relatively easily.

  The member fastening structure for a vehicle body according to the third aspect of the present invention has an excellent effect of being able to effectively suppress or prevent the occurrence of cracks around the fastening hole.

  The member fastening structure for a vehicle body according to the fourth aspect of the present invention has an excellent effect that the strength of the second vehicle body constituent member against a collision load can be improved.

  The member fastening structure for a vehicle body according to the fifth aspect of the present invention has an excellent effect that the load transmission performance of the load transmission path for distributing the load can be improved.

  The member fastening structure for a vehicle body according to the present invention described in claim 6 has an excellent effect that the load transmission performance of the load transmission path for distributing the load can be improved.

  The member fastening structure for a vehicle body according to the seventh aspect of the present invention has an excellent effect that it is possible to suppress or prevent the collapse of the cross section of the second vehicle body constituent member.

  The member fastening structure for a vehicle body according to the eighth aspect of the present invention has an excellent effect that the load transmission performance of the load transmission path for distributing the load can be improved.

  The member fastening structure for a vehicle body according to the ninth aspect of the present invention has an excellent effect that the function of dispersing the load can be enhanced by the increase in the plate thickness.

  The member fastening structure for a vehicle body according to the tenth aspect of the present invention has an excellent effect that both the weight reduction of the vehicle body and the improvement of the proof stress of the vehicle body at the time of collision can be achieved.

  According to the eleventh aspect of the present invention, in the vehicle body member fastening structure, even if a tensile load acts around the second fastening hole formed in the mounting portion of the impact beam at the time of a side collision of the vehicle, the second fastening hole It has the outstanding effect that it can suppress or prevent that a crack generate | occur | produces around.

FIG. 3A is a plan sectional view of a vehicle side door (a sectional view taken along the line XX in FIG. 3), and FIG. 3B is a diagram illustrating a connecting member mounted on an end portion of the impact beam in the longitudinal direction. It is a perspective view which shows the state made. It is a perspective view of the connection member which shows the fiber direction of the connection member shown by FIG. 1 (B). It is a side view showing the side door for vehicles concerning a 1st embodiment. (A) is a plan sectional view of a vehicle side door corresponding to FIG. 1 (A), and (B) is a perspective view showing a longitudinal end portion (open end portion) of an impact beam. is there. It is related with explanatory drawing for demonstrating the effect | action of proportionality, (A) is a schematic diagram which shows the mode of the fastening hole when a tensile load acts, (B) is an initial stage crack from the state of (A). It is a schematic diagram which shows a mode that it did. FIG. 5 is an explanatory diagram for explaining the operation when the vehicle body member fastening structure according to the first embodiment is employed, and is a schematic diagram showing that cracks do not grow even when an initial crack occurs. FIG. 4 is an explanatory diagram for explaining the effect of the first embodiment, in which (A) is a plan view of an impact beam showing that a bending moment is generated at an end of the impact beam, and (B) is a cross section of the impact beam. It is the side view seen in the longitudinal direction of the impact beam which shows that collapse arises. (A) is a plane sectional view of a vehicle side door according to the second embodiment, and (B) is a perspective view showing a state in which a connecting member is attached to an end portion in the longitudinal direction of an impact beam. (A) is a perspective view of a connecting member according to the third embodiment, and (B) is a plan sectional view showing a state in which the connecting member is attached to an end portion in the longitudinal direction of an impact beam. It is a top sectional view of the side door for vehicles concerning a modification and corresponding to Drawing 1 (A).

[First Embodiment]
Hereinafter, a first embodiment of a vehicle body member fastening structure according to the present invention will be described with reference to FIGS. Note that an arrow FR appropriately shown in each figure indicates the vehicle front side, and an arrow UP indicates the vehicle upper side. Furthermore, the arrow IN indicates the inner side in the vehicle width direction.

  As shown in FIG. 3 and FIG. 1 (A), the vehicle side door 10 includes a door inner panel 12 as a first vehicle body constituent member arranged on the inner side in the vehicle width direction, and a vehicle width direction of the door inner panel 12. The door outer panel 14 disposed outside is provided with a door main body portion 16 constituted by the door outer panel 14. Supplementally, a flange portion 12E described later is formed on the outer peripheral portion of the door inner panel 12, and the outer end portion 14A of the door outer panel 14 is hemmed into the flange portion 12E, whereby the door outer panel 14 and the door inner are formed. The panel 12 is integrated. A resin door trim (not shown), which is an interior part, is attached to the inner side of the door inner panel 12 in the vehicle width direction. The door outer panel 14 and the door inner panel 12 are made of metal such as a steel plate or an aluminum alloy plate.

  The door inner panel 12 includes a main body portion 12A whose surface is directed toward the vehicle interior side (extending along the vehicle front-rear direction and the vehicle vertical direction). The outer peripheral end of the main body 12A is bent outward in the vehicle width direction to form a first outer peripheral wall 12B. Further, the end portion of the first outer peripheral wall portion 12B on the outer side in the vehicle width direction is bent in the vehicle front-rear direction or the vehicle lower side to form a second outer peripheral wall portion 12C as a mounted portion. Furthermore, the outer peripheral end portion of the second outer peripheral wall portion 12C is bent outward in the vehicle width direction to form a third outer peripheral wall portion 12D. The outer peripheral end portion of the third outer peripheral wall portion 12D is bent in the vehicle front-rear direction or the vehicle lower side to form a flange portion 12E.

  A beam-shaped impact beam 20 as a second vehicle body constituting member is disposed inside the cross section of the vehicle side door 10 described above. The impact beam 20 is bridged so as to cross the cross section of the vehicle side door 10 with the longitudinal direction of the vehicle as a longitudinal direction. The impact beam 20 is formed in a cylindrical shape and is made of fiber reinforced resin such as carbon fiber reinforced resin (CFRP) or glass fiber reinforced resin (GFRP).

  Next, as shown in FIGS. 1A and 1B, a mounting (reinforcing) structure of the impact beam 20 to which the vehicle body member fastening structure according to the present invention is applied will be described in detail.

  The impact beam 20 of the present embodiment is formed in a rectangular tube shape, an inner wall 20A disposed on the inner side in the vehicle width direction, an outer wall 20B disposed in parallel with the inner wall 20A and disposed on the outer side in the vehicle width direction, A bottom wall 20C that connects the lower ends of the inner wall 20A and the outer wall 20B, and a top wall 20D that connects the upper ends of the inner wall 20A and the outer wall 20B are provided. The longitudinal end of the impact beam 20 (the rear end is shown in FIG. 1A) is cut obliquely. As a result, at the end in the longitudinal direction of the impact beam 20, an open portion 22 is formed in which the inner wall 20A is longer in the longitudinal direction than the outer wall 20B and is opened to the outside.

  An end in the longitudinal direction of the inner wall 20 </ b> A of the impact beam 20 is an attachment portion 24 for attaching the impact beam 20 to the second outer peripheral wall portion 12 </ b> C of the door inner panel 12. A second fastening hole 26 is formed in the attachment portion 24. Correspondingly, a first fastening hole 28 is formed coaxially with the second fastening hole 26 in the second outer peripheral wall portion 12 </ b> C of the door inner panel 12.

  Further, a connecting member 30 made of a fiber reinforced resin is attached to the open portion 22 of the impact beam 20 described above, similarly to the impact beam 20. The connecting member 30 includes a rectangular flat plate-like fastening portion 32 disposed in contact with the mounting portion 24 of the impact beam 20 and a connecting portion 34 that connects the fastening portion 32 and the open portion 22. Has been. The connecting portion 34 is an end portion of the open portion 22 facing the fastening portion 32 (that is, an end portion in the longitudinal direction of the outer wall 20B of the impact beam 20, and this portion is hereinafter referred to as an “outer wall end portion 36”. 34A) and an intermediate portion 34B that connects the fixing portion 34A and the fastening portion 32 to each other.

  A third fastening hole 38 is formed coaxially with the first fastening hole 28 and the second fastening hole 26 at the center of the fastening part 32. The intermediate part 34 </ b> B is arranged perpendicular to the fixed part 34 </ b> A and the fastening part 32. The fastening portion 32 is bonded to the mounting portion 24 of the impact beam 20 with an adhesive 40. Further, the fixing portion 34 </ b> A of the connecting member 30 is bonded to the outer surface of the outer wall end portion 36 of the impact beam 20 with an adhesive 40.

  Further, both side portions of the fastening portion 32 of the connecting member 30 and both side portions of the intermediate portion 34B are connected to each other by a pair of side wall portions 42 formed in a triangular shape. In addition, the fiber direction of each part of the connection member 30 is shown by the arrow in FIG. The fiber direction matches the action direction of the tensile load input to the connecting member 30.

  Further, the edge 36 </ b> A of the outer wall end portion 36 of the impact beam 20 is covered with the connecting portion 34 of the connecting member 30. More specifically, the connecting portion of the connecting member 30 so that the back surface 44 of the intermediate portion 34B constituting the vertical wall of the connecting portion 34 of the connecting member 30 is in line contact with the edge 36A of the outer wall end portion 36 of the impact beam 20. 34 covers the edge 36 </ b> A of the outer wall end 36 of the impact beam 20. This point will be further described later.

  The first fastening hole 28 formed in the mounted portion 46 of the door inner panel 12 having the above configuration, the second fastening hole 26 formed in the mounting portion 24 of the impact beam 20, and the fastening portion 32 of the connecting member 30 are formed. After the collar 48 formed in a substantially cylindrical shape is inserted into the third fastening hole 38 from the fastening portion 32 side, a bolt 50 as a fastening member is inserted from the attached portion 46 side and fastened from the fastening portion 32 side. By screwing the nut 52 as a member, the mounting portion 24 which is the end portion of the impact beam 20 in the longitudinal direction is fixed to the mounted portion 46 of the door inner panel 12 via the connecting member 30.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  4 (A) and 4 (B) show a vehicle side door as a comparative example. It should be noted that this comparison is different from the vehicle side door 10 of the present embodiment shown in FIG. 1A only in that the connecting member is not provided, and therefore the same reference numerals are given. . When a collision load from the outside in the vehicle width direction is input to the vehicle side door 10 shown in a proportional manner, the beam-shaped impact beam 20 made of fiber reinforced resin is stretched against the collision load. For this reason, a relatively large tensile load F acts around the second fastening hole 26 formed in the mounting portion 24 of the impact beam 20. For this reason, as shown in FIG. 5A, the tensile load F and the reaction force −F act around the third fastening hole 38, and the points A and B above and below the third fastening hole 38. Stress concentration occurs. As a result, as shown in FIG. 5B, it is conceivable that minute cracks 54 are generated. In addition, if the micro crack 54 generate | occur | produces, the crack 54 may grow.

  Here, in the present embodiment, a connection member 30 made of fiber reinforced resin is provided separately from the impact beam 20. Further, the connecting member 30 includes a fastening portion 32 in which a third fastening hole 38 that overlaps the second fastening hole 26 is formed, and a connecting portion 34 that connects the fastening portion 32 and the open portion 22 included in the impact beam 20. It is equipped with. Therefore, the tensile load F transmitted from the bolt 50 to the impact beam 20 is divided into a tensile load F1 transmitted around the second fastening hole 26 and a tensile load F2 transmitted around the third fastening hole 38. Distributed and transmitted. Then, the tensile load F <b> 2 transmitted to the fastening portion 32 side of the connecting member 30 is transmitted to the side (the outer wall 20 </ b> B of the impact beam 20) facing the fastening portion 32 in the open portion 22 of the impact beam 20 via the connecting portion 34. Is done. In addition, in the present embodiment, the fastening portion 32 and the open portion 22 of the impact beam 20 are coupled so that the edge (ridge line) 36A on the side facing the fastening portion 32 in the open portion 22 is covered. The tensile load F2 is reliably transmitted via 36A. Thus, according to this embodiment, since the load transmission path is two paths, the stress concentration generated around the second fastening hole 26 of the impact beam 20 is alleviated, and initial crack generation is suppressed or prevented. As a result, according to the present embodiment, a crack occurs around the second fastening hole 26 even when the tensile load F acts around the second fastening hole 26 at the time of a vehicle collision, particularly at a side collision. Can be suppressed or prevented.

  In addition, the fiber direction of each part of the connection member 30 mentioned above also contributes to the said effect. If it demonstrates using a figure, as shown in FIG. 6, even if the micro crack 54 will generate | occur | produce, if the fiber direction of each part of the connection member 30 is made to correspond with the action direction of a tensile load, the crack 54 will be expanded. The force to be transmitted is transmitted to the fiber. For this reason, the crack 54 does not expand any more.

  In the present embodiment, the connecting member 30 includes a fastening portion 32, a fixing portion 34A, and an intermediate portion 34B. Thereby, the tensile load F distributed to the fastening part 32 side of the connecting member 30 is transmitted to the fixing part 34A through the intermediate part 34B. For this reason, the amount of load transmission can be adjusted by changing the structure of the intermediate part 34B. Therefore, according to the present embodiment, the load distribution function can be changed relatively easily.

  Furthermore, in the present embodiment, the intermediate portion 34B is disposed perpendicular to the fixed portion 34A, and the back surface 44 of the intermediate portion 34B is in line contact with the edge 36A of the open portion 22 of the impact beam 20, Good load transmission efficiency. As a result, according to this embodiment, the occurrence of cracks around the second fastening hole 26 can be effectively suppressed or prevented.

  In the present embodiment, the intermediate portion 34 </ b> B and the fastening portion 32 are connected to each other by one or more side wall portions 42 that are orthogonal to each other. resist. If it demonstrates using a figure, as FIG. 7 (A) shows, the bending moment M which will carry out the bending deformation of the said edge part will act on the edge part of the longitudinal direction of the impact beam 20. FIG. Therefore, when the pair of side wall portions 42 are connected so as to be orthogonal to the fastening portion 32 and the intermediate portion 34B, the cross-sectional secondary moment of the end portion can be increased. Therefore, the rigidity of the end portion in the longitudinal direction of the impact beam 20 can be increased. Further, as shown in FIG. 7B, the side wall portion 42 serves as a bulkhead (bamboo node) at the end portion of the impact beam 20 in the longitudinal direction. For this reason, it is possible to suppress or prevent the impact beam 20 from collapsing in cross section as shown in the two-dot chain line illustrated state. Thereby, according to this embodiment, the proof stress of the impact beam 20 with respect to a collision load can be improved.

  Furthermore, in this embodiment, since the fixing portion 34A of the connecting member 30 is adhered to the end (outer wall 20B) of the opening portion 22 of the impact beam 20 on the side facing the fastening portion 32 with the adhesive 40, the connecting member 30 is firmly fixed by the end portion (outer wall end portion 36) on the side facing the fastening portion 32 in the open portion 22 of the impact beam 20. As a result, according to the present embodiment, the load transmission performance of the load transmission path for distributing the load can be improved.

  In this embodiment, since the fastening portion 32 of the connecting member 30 is bonded to the mounting portion 24 of the impact beam 20 with the adhesive 40, the connecting member 30 is firmly fixed to the mounting portion 24 side of the impact beam 20. , Rigidity is also improved. As a result, according to the present embodiment, the load transmission performance of the load transmission path for distributing the load can be improved.

  Furthermore, in the present embodiment, at least the attachment portion 24 of the beam-shaped impact beam 20 is made of fiber reinforced resin, and the connecting member 30 is also made of resin. On the other hand, the panel-like door inner panel 12 is made of metal. Therefore, the occurrence of cracks on the fiber reinforced resin member side between members of different materials in the vehicle body structure is effectively suppressed or prevented. Therefore, according to this embodiment, it is possible to achieve both weight reduction of the vehicle body and improvement of the proof stress of the vehicle body at the time of collision.

  In the present embodiment, the vehicle body member fastening structure according to the present invention is applied to the vehicle side door 10. Specifically, the longitudinal end portion (outer wall end portion 36) of the impact beam 20 is connected to the attached portion 46 of the metal door inner panel 12 via the connection member 30 made of fiber reinforced resin, and the bolt 50 and the nut 52. It is concluded with.

  Here, when the vehicle collides sideways, a colliding body such as a counterpart vehicle or a pole tries to deform the vehicle side door 10 inward in the vehicle width direction. At this time, the impact beam 20 disposed along the vehicle front-rear direction in the vehicle side door 10 is stretched to suppress or prevent the door inner panel 12 from being deformed inward in the vehicle width direction. When the impact beam 20 is stretched, a tensile load F acts on each circumference of the second fastening hole 26 and the third fastening hole 38 through the bolt 50. Thereby, the tensile load F <b> 2 transmitted to the periphery of the third fastening hole 38 is transmitted to the side facing the fastening portion 32 in the open portion 22 of the impact beam 20 through the connecting member 30. As a result, the load is dispersed, and the tensile load acting around the second fastening hole 26 is reduced (F1 <F). As a result, the stress concentration generated around the second fastening hole 26 is alleviated. As a result, even if a tensile load acts on the periphery of the second fastening hole 26 formed in the mounting portion 24 of the impact beam 20 at the time of a side collision of the vehicle, a crack is generated around the second fastening hole 26. It can be suppressed or prevented.

[Second Embodiment]
Hereinafter, the second embodiment of the vehicle body member fastening structure according to the present invention will be described with reference to FIG. Note that the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 8A and 8B, the vehicle side door 10 according to the second embodiment is characterized in that a first rib 62 and a second rib 64 are provided on the connecting member 60. There is. Specifically, the first rib 62 and the second rib 64 are integrally formed in the intermediate portion 34B of the connecting portion 34 in the connecting member 60. The first rib 62 is formed on the lower surface side of the intermediate portion 34B, and the second rib 64 is formed on the upper back surface side of the intermediate portion 34B. Further, the first rib 62 and the second rib 64 extend in a direction from the fastening portion 32 toward the fixing portion 34A. Further, both the first rib 62 and the second rib 64 are disposed in the intermediate portion in the width direction of the intermediate portion 34B.

  Further, the first rib 62 is formed in a right triangle shape in a side view across the lower portion of the intermediate portion 34B and the fastening portion 32. Further, the first rib 62 is disposed perpendicular to the intermediate portion 34 </ b> B and the fastening portion 32. On the other hand, the second rib 64 is erected from the upper part of the intermediate portion 34B, and a predetermined gap 66 is formed between the second rib 64 and the fixed portion 34A. The gap dimension of the gap 66 substantially matches the plate thickness of the outer wall 20B of the impact beam 20, and the outer wall 20B of the impact beam 20 is inserted between the second rib 64 and the fixed portion 34A. In the assembled state, the second rib 64 is arranged perpendicular to the inner wall surface 68 on the side of the open portion 22 facing the fastening portion 32.

(Action / Effect)
According to the above configuration, since the first rib 62 is formed across the intermediate portion 34B and the fastening portion 32 and is disposed perpendicular to both, the rigidity of the connecting member 60 is improved. As a result, it is possible to suppress or prevent the collapse of the cross section of the impact beam 20.

  Further, the second rib 64 is erected from the upper back surface of the intermediate portion 34 </ b> B and is disposed perpendicular to the inner wall surface 68 on the side facing the fastening portion 32 in the connecting portion 34 and the open portion 22. For this reason, when the second rib 64 is seen together with the first rib 62, the first rib 62 is disposed perpendicular to the fastening portion 32 and the intermediate portion 34B of the connecting member 60, and the intermediate portion 34B of the connecting member 60 A second rib 64 is arranged vertically with respect to the inner wall surface 68 on the side facing the fastening portion 32 of the open portion 22 of the impact beam 20. Therefore, under a situation where a collision load is input to the impact beam 20, a load transmission path that passes through the first rib 62 and the second rib 64 is newly formed. As a result, according to the present embodiment, the load transmission performance of the load transmission path for distributing the load can be improved.

  In the above embodiment, the second rib 64 is formed on the connecting member 60 side. However, the present invention is not limited to this, and a rib corresponding to the second rib 64 is bonded to the back surface side of the outer wall end portion 36 of the impact beam 20. You may make it adhere | attach with an agent.

[Third Embodiment]
Hereinafter, a third embodiment of the vehicle body member fastening structure according to the present invention will be described with reference to FIG. Note that the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 9A and 9B, in the third embodiment, the plate thickness of the intermediate part 34B in the connecting part 34 of the connecting member 70 is not constant, and other parts (fastening part 32, fixed It is characterized in that the plate thickness is thicker than the portion 34A and the side wall portion 42). Specifically, the intermediate portion 34B has a right triangle shape in cross section, and is formed such that the plate thickness gradually increases from the fixing portion 34A side toward the fastening portion 32 side.

(Action / Effect)
The above configuration also includes the configuration of the first embodiment described above, so that the same effect as that of the first embodiment can be obtained. Furthermore, since the plate | board thickness of the intermediate part 34B is thick compared with another site | part, the rigidity of the connection member 70 becomes higher. Accordingly, the function of distributing the load is strengthened compared to the first embodiment.

[Fourth Embodiment]
Hereinafter, the fourth embodiment of the vehicle body member fastening structure according to the present invention will be described with reference to FIG. Note that the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 10, in the fourth embodiment, the impact beam 72 is made of a metal steel pipe (for example, a circular steel pipe or a square steel pipe), and a metallic end is provided at the longitudinal end portion 70A thereof. A mounting bracket 74 is attached by welding or the like. A second fastening hole 26 is formed coaxially with the first fastening hole 28 in the mounting portion 24 provided on the end side of the mounting bracket 74.

  On the other hand, the connecting member 76 is the same as the connecting member 30 of the first embodiment described above in that it includes the connecting portion 34 including the fastening portion 32, the intermediate portion 34B, and the fixing portion 34A, and the pair of side wall portions 42. The intermediate portion 34B is different from the connecting member 30 of the first embodiment in that the intermediate portion 34B intersects the obtuse angle with the fastening portion 32 and the fixing portion 34A. Therefore, the intermediate portion 34B is in line contact with the edge 36A of the outer wall end portion 36, but does not come into contact with the end surface of the end portion 72A in the longitudinal direction. That is, a triangular gap 78 is formed between the longitudinal end portion 72A of the impact beam 72 and the intermediate portion 34B.

(Action / Effect)
Also with the above configuration, since the connecting member 76 is configured in the same manner as the connecting member 30 of the first embodiment except that the intermediate portion 34B is inclined, the same effect as the first embodiment can be obtained.

[Supplementary explanation of the above embodiment]
(1) Definition of terms The term “so that the edge is covered” described in claim 1 means that “the connecting member contacts the edge on the side facing the fastening portion in the open portion of the second vehicle body component”. Means. Therefore, as in the first embodiment, the outer wall end portion 36 of the impact beam 20 is closed by the intermediate portion 34B of the connecting portion 34 of the connecting member 30, and the back surface 44 of the intermediate portion 34B is in line contact with the edge 36A. In addition, the intermediate portion 34B does not block the longitudinal end portion 72A of the impact beam 72 and the back surface 44 of the intermediate portion 34B is the longitudinal end portion of the impact beam 72 as in the connecting member 76 shown in FIG. The case where line contact (in the case of a square steel pipe) or point contact (in the case of a round steel pipe) is also included in the edge 80 of 72A.

(2) In each of the above-described embodiments, the vehicle body member fastening structure according to the present invention is applied to the vehicle side door 10, but the application target of the present invention is not limited thereto. For example, you may apply this invention to the floor brace which connects the instrument panel reinforcement arrange | positioned by making the vehicle width direction into the longitudinal direction inside an instrument panel, and a vehicle body floor or a front pillar. In this case, the floor brace serves as the second vehicle body structural member, and the vehicle body floor or the front pillar serves as the first vehicle body structural member.

10 side door for vehicle 12 door inner panel (first body component)
20 Impact beam (second body component)
22 Opening portion 24 Mounting portion 26 Second fastening hole 28 First fastening hole 30 Connecting member 32 Fastening portion 34 Connecting portion 34A Fixing portion 34B Intermediate portion 36 Outer wall end portion 36A Edge 38 Third fastening hole 40 Adhesive 42 Side wall portion 46 Covered Mounting part 50 bolt (fastening member)
52 Nut (fastening member)
60 connecting member 62 first rib 64 second rib 70 connecting member 72 impact beam (second vehicle body constituting member)
74 Mounting bracket (Mounting part)
76 Connecting members

Claims (11)

A panel-like first vehicle body constituting member having a mounted portion in which a first fastening hole is formed;
A beam-shaped second vehicle body component member having an open portion opened to the outside and a mounting portion formed with a second fastening hole overlapping the first fastening hole, and at least the mounting portion made of fiber reinforced resin When,
The fastening portion has a fastening portion formed with a third fastening hole that overlaps with the second fastening hole, and connects the fastening portion and the opening portion so that an edge of the opening portion facing the fastening portion is covered. A connection member made of fiber reinforced resin in which a connection part is formed;
A fastening member that is inserted into the first fastening hole, the second fastening hole, and the third fastening hole and fastens the fastening part to the attached part with the attaching part interposed therebetween;
A member fastening structure for a vehicle body comprising: The connecting portion includes a fixing portion that is fixed to an end portion of the open portion facing the fastening portion, and an intermediate portion that connects the fixing portion and the fastening portion.
The member fastening structure for a vehicle body according to claim 1. The intermediate portion is disposed perpendicular to the fixed portion;
Furthermore, the back surface of the intermediate portion is in line contact with the edge,
The vehicle body member fastening structure according to claim 2. The intermediate portion and the fastening portion are connected to each other by one or more side wall portions orthogonal to both.
The member fastening structure for a vehicle body according to claim 2 or claim 3. The fixing portion is bonded to the end portion of the open portion facing the fastening portion with an adhesive.
The member fastening structure for a vehicle body according to any one of claims 2 to 4. The fastening portion is bonded to the attachment portion with an adhesive.
The vehicle body member fastening structure according to any one of claims 1 to 5, wherein: The connecting portion is formed with a first rib extending in a direction from the fastening portion toward the fixing portion and arranged perpendicular to the fastening portion and the connecting portion.
The member fastening structure for a vehicle body according to any one of claims 1 to 6. The connecting portion is formed with a second rib that extends in a direction from the fastening portion toward the fixing portion and is disposed perpendicular to the inner wall surface of the connecting portion and the open portion facing the fastening portion. Being
The vehicle body member fastening structure according to claim 7. The plate thickness of the connecting portion in the connecting member is set to be thicker than the plate thickness of the fastening portion.
The member fastening structure for a vehicle body according to any one of claims 1 to 8. The first vehicle body component is made of metal,
The member fastening structure for a vehicle body according to any one of claims 1 to 9. The first vehicle body component member is a door inner panel disposed on the vehicle width direction inner side of the vehicle side door,
The second vehicle body constituting member is disposed in the vehicle side door along the vehicle front-rear direction, and an end portion in the longitudinal direction is fixed to the door inner panel by the fastening member via the connecting member. It is considered as an impact beam,
The vehicle body member fastening structure according to claim 10.

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