JP3865178B2 - Support and reinforcement structure for automobile seats - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support and reinforcement structure for a vehicle seat that reinforces a joint portion of a cross member that supports the seat to a side sill.
[0002]
[Prior art]
Conventionally, a seat support structure in a car body of an automobile has been disclosed in Japanese Patent Application Laid-Open No. 3-96488.
[0003]
According to the above publication, the body frame of the automobile has a pair of left and right side sills extending along the longitudinal direction of the vehicle body, and extends in the vehicle width direction so that each end in the longitudinal direction thereof extends in the longitudinal direction of each side sill. And a cross member coupled to the midway portion. Further, a floor panel is provided which extends substantially horizontally between the side sills and whose edges in the vehicle width direction are coupled to the corresponding side sills. It is connected to the cross member. In addition, a reinforcing plate for connecting the side sill and the edge of the floor panel connected to the side sill is provided, while a sheet is supported by the cross member.
[0004]
When the automobile having the above configuration collides with an object located ahead during the traveling (hereinafter referred to as “front collision”), the impact force causes the joint of the edge of the floor panel to the side sill. A large stress is generated, and the edge of the floor panel tends to peel from the side sill. However, this peeling is prevented by the reinforcing plate.
[0005]
[Problems to be solved by the invention]
By the way, at the time of the “front collision”, a large external force is applied to the cross member due to the impact force at that time and the inertial force of the seat and the seated person seated on the seat. For this reason, a large stress tends to be generated in the joint portion of the end of the cross member to the side sill, and the end of the cross member tends to peel from the side sill.
[0006]
Here, since the floor panel is coupled to the cross member, the large external force from the seat or the like on the cross member is supported by the side sill even through the floor panel and the reinforcing plate. For this reason, the peeling tends to be relaxed, but the external force from the sheet or the like is extremely large, and the reinforcing plate is provided for preventing peeling of the edge of the floor panel with respect to the side sill as described above. Therefore, in the conventional technique, the support of the sheet with respect to the cross member is not always satisfactory in terms of strength, and there is room for improvement.
[0007]
The present invention has been made paying attention to the above-described circumstances, and by strengthening the joint portion of the cross member that supports the sheet to the side sill, the support of the sheet to the cross member is further strengthened. It is an object of the present invention to achieve the above-mentioned reinforcement with a simple configuration.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, a support reinforcing structure for an automobile seat of the present invention is as follows.
[0009]
According to the first aspect of the present invention, the vehicle body frame 3 includes a pair of left and right side sills 14 and 14 extending in the front-rear direction of the vehicle body 2, and end portions 18 a in the longitudinal direction extending in the vehicle width direction. And a cross member 18 coupled to a midway portion in the longitudinal direction, and extends substantially horizontally between the side sills 14, 14, and each edge 23 a in the vehicle width direction corresponds to each side sill 14 corresponding thereto. A floor panel 23 to be coupled is provided, a midway portion in the front-rear direction of the floor panel 23 is coupled to the cross member 18, the side sill 14, and an edge 23a of the floor panel 23 coupled to the side sill 14. In the automobile 1 in which the reinforcing plate 25 for connecting the two members to each other is provided and the seat 34 is supported by the cross member 18,
[0010]
The reinforcing plate 25 is integrally formed with a longitudinal piece 48 having a substantially L-shaped cross section and extending in a substantially vertical direction, and from the lower end edge of the longitudinal piece 48 toward the vehicle body center 12 side in the vehicle width direction. The horizontal piece 49 is connected to the side sill 14 by spot welding (S9), and the horizontal piece 49 is spot welded to the end of the floor panel 23 in the vehicle width direction ( S6, S10 bound by), the side sill 14, is obtained by coupling the end 18a, and the portion of the reinforcing plate 25 are overlapped with each other in the vehicle width direction spot welding of the cross member 18 (S2).
[0011]
In addition to the invention of claim 1, the invention of claim 2 supports the front portion of the seat 34 on the cross member 18 and the end 18a of the cross member 18 and the reinforcing plate 25 on the upper surface of the side sill 14. Each of these parts is superposed and combined with each other.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
In the figure, reference numeral 1 denotes an automobile, and an arrow Fr indicates the front thereof.
[0014]
The vehicle body 2 of the automobile 1 includes a sheet metal body frame 3, a sheet metal body body 4 supported by the body frame 3, and a sheet metal subframe 5 supported by the front portion of the body frame 3. The vehicle body 2 is supported on the running surface 9 by left and right front wheels 7 suspended on the subframe 5 and left and right rear wheels 8 and 8 suspended on the rear portion of the vehicle body frame 3.
[0015]
The vehicle body frame 3 is substantially symmetrical with respect to the vehicle body center 12 in the vehicle width direction of the vehicle body 2. The vehicle body frame 3 extends in the front-rear direction on a pair of left and right front side frames 13, 13 extending along the front-rear direction of the vehicle body 2 with the vehicle body center 12 interposed therebetween, and on the outer sides of the side frames 13, 13, respectively. In addition, a pair of left and right side sills 14, 14 disposed between the front wheel 7 and the rear wheel 8 respectively on the left and right side portions of the vehicle body 2, and the rear end portions of the side sills 14 extend rearward. The front end portion includes a rear side frame 15 that is joined to the rear end portion of the side sill 14 by spot welding or the like.
[0016]
The vehicle body frame 3 includes a cross member 16 that joins the front end portions of the side frames 13 to each other, midway portions in the longitudinal direction of the side frames 13, and the side sills 14 that correspond to the intermediate portions in the vehicle width direction. A cross member 17 for connecting the front end portions to each other, a longitudinal halfway portion of each side frame 13 and a longitudinal halfway portion of each side sill 14 before, the rear cross members 18, 19, and the above A rear cross member 20 that connects the rear end portions of the side sills 14 and the left and right connecting portions 19 of the front end portions of the side frames 15, and a plurality of other cross members 21 before and after the side frames 15 are connected to each other. The cross members 16 to 21 described above extend in the vehicle width direction.
[0017]
In the above case, the end portions 18a and 19a in the longitudinal direction of the cross members 18 and 19 are respectively joined to the corresponding midway portions in the longitudinal direction of the side sills 14 by spot welding S1 and S2 (hereinafter referred to as this). Is simply referred to as spot welding S).
[0018]
A floor panel 23 that constitutes the lower part of the vehicle body 4 and extends substantially horizontally between the side sills 14, 14 is provided, and each edge 23a in the vehicle width direction of the floor panel 23 is bent downward. The side sills 14 corresponding to the end edges 23a are spot welded S3. The floor panel 23 is placed on the upper surfaces of the side frames 13 and 15 and the cross members 17, 20, and 21, and is joined to them by spot welding S 4. Further, the midway portion of the floor panel 23 in the front-rear direction is joined to the lower surfaces of the front and rear cross members 18 and 19 and spot welded S5 to S7, respectively. A reinforcing plate 25 is provided for coupling the side sill 14 and the edge 23a of the floor panel 23 coupled thereto.
[0019]
The vehicle body 4 includes a front pillar 26, a center pillar 27, and a rear pillar 28 that protrude upward from the side sills 14 on the left and right sides of the vehicle body frame 3, and a roof panel 29 is supported by these. The interior is a vehicle compartment 30. A portion of the vehicle body center 12 of the floor panel 23 bulges upward and extends in the front-rear direction to form a tunnel 31. The tunnel 31 is a portion having high strength and rigidity.
[0020]
A handle 32 is supported on the front portion of the vehicle compartment 30 so as to be steerable, and a pair of left and right seats 34 are respectively provided on the floor 30 via seat support means 33 at a portion of the vehicle compartment 30 behind the handle 32. Supported on the front portion of the panel 23, each seat support means 33 is composed of a pair of left and right seat rails 35, 35, respectively. Also, a pair of left and right other sheets 36 are supported on the rear portion of the floor panel 23.
[0021]
In the above case, one of the seat rails 35, 35 in each seat support means 33 is supported across the front and rear cross members 18, 19, that is, the cross members 18, 19 are It is indirectly supported by the floor panel 23. The other seat rails 35 are supported on the tunnel 31, that is, directly supported by the floor panel 23. As a result, of the front and rear cross members 18, 19, the front portion of the seat 34 is supported by the front cross member 18 via the seat support means 33, and the seat support means 33 is attached to the rear cross member 19. The rear portion of the sheet 34 is supported. A seat 37 such as a driver can be seated on each of the seats 34 and 36.
[0022]
1 and 4, each side sill 14 includes an outer panel 38 and an inner panel 39 facing each other in the vehicle width direction, and the upper end edges and the lower end edges of the outer panels 38 and 39 are spot-welded S8 to each other. The cross-sectional box shape.
[0023]
In FIG. 3, the cross members 18 and 19 include a pair of left and right side members 40 and 40 coupled to the upper surfaces of the side portions of the floor panel 23, and the side members 40 and 40, respectively. And a central member 41 which is arranged inside the tunnel 31 and is coupled to the tunnel 31.
[0024]
1 and 4, each of the side members 40 is formed by pressing a long sheet metal material, and includes a ceiling plate 43 extending in the vehicle width direction, and front and rear of the ceiling plate 43. A pair of front and rear side plates 44, 44 extending downward from each end edge, and an outward flange 45 extending integrally from the lower end edge of each side plate 44 toward the front or rear, Each cross section in the longitudinal direction has a substantially inverted U shape.
[0025]
Extending plates 46 are integrally extended outward from the longitudinal edges of the ceiling plate 43 at the end portions 18a and 19a of the cross members 18 and 19, respectively. The protruding end portion is positioned above the inner panel 39 of the side sill 14. Further, other outward flanges 47 are integrally extended to the respective longitudinal edges of the respective side plates 44, and each of the outward flanges 47 is connected to the overlapping portion 51 of the side sill 14 and the tunnel 31. The side walls are spot welded S2 and S7, respectively.
[0026]
The reinforcing plate 25 is integrally formed with a longitudinal piece 48 having a substantially L-shaped cross section and extending in a substantially vertical direction, and from the lower end edge of the longitudinal piece 48 toward the vehicle body center 12 side in the vehicle width direction. The laterally extending piece 49 that extends in the vehicle width direction and the longitudinally extending piece 48 that extends upward from the longitudinally facing piece 48 at positions corresponding to the end portions 18a and 19a of the cross members 18 and 19 in the vehicle width direction. The vertical piece 48 is spot welded S9 to the inner panel 39 of the side sill 14, and the horizontal piece 49 is spot welded S6, S10 to the upper surface of the end of the floor panel 23 in the vehicle width direction. The extending end of the extending plate 50 is positioned above the inner panel 39 of the side sill 14.
[0027]
The inner panel 39 of the side sill 14, the extending plate 46 and the outward flange 47 at the end portions 18 a and 19 a of the cross members 18 and 19, and the extending plate 50 of the reinforcing plate 25 are overlapped with each other. Three sheets are stacked, and these are integrally spot welded S1 and S2.
[0028]
Further, in the above case, on the upper surface of the inner panel 39 of the side sill 14, it is a part of each of the extension plate 46 and the extension plate 50 of the reinforcing plate 25 at each end 18 a, 19 a of each cross member 18, 19. The extending end portions are overlapped with each other to form three overlapping portions 51, and the overlapping portions 51 are integrally coupled to each other by spot welding S1.
[0029]
According to the above configuration, the side sill 14, the end portions 18 a and 19 a of the cross members 18 and 19, and each part of the reinforcing plate 25 are overlapped with each other and joined by spot welding S 1 and S 2. 34, the connecting portions of the cross members 18 and 19 that support the end portions 18a and 19a are strongly reinforced by the reinforcing plate 25, and at the time of “front collision”, the impact force at that time, the seat 34, and this A large external force due to the inertial force with the seated person seated on the seat 34 is applied to the cross member 18, but the side sill 14 and the end portions 18 a and 19 a of the cross members 18 and 19 that support the seat 34 are provided by the reinforcement. It is possible to prevent a large stress from being generated in the joint portion with the end portions 18a, 1 of the cross members 18, 19 from the side sill 14. Separation of a is more reliably prevented.
[0030]
Therefore, the sheet 34 is more firmly supported by the cross members 18 and 19.
[0031]
Further, in the above case, the side sill 14, the end portions 18a and 19a of the cross members 18 and 19, and the reinforcing plate 25 are partially overlapped and joined in a direction substantially perpendicular to the vertical direction and the vehicle width direction. For this reason, it is possible to suppress the occurrence of directionality in strength at the joint portion between the side sill 14 and the end portions 18a and 19a of the cross members 18 and 19, so that the cross member from the automobile 1 is prevented. Separation of the end portions 18a, 19a of the 18, 19 is further reliably prevented.
[0032]
In addition, the reinforcing plate 25 is provided to prevent the edge 23 a of the floor panel 23 from peeling off from the side sill 14, but the reinforcing plate 25 is used to prevent the cross members 18 and 19 from being attached to the side sill 14. This is used to prevent the end portions 18a and 19a from being peeled off. For this reason, the reinforcement of the joint portion between the side sill 14 and the end portions 18a and 19a of the cross members 18 and 19 has a simple structure. Achieved.
[0033]
That is, the strong support of the sheet 34 by the cross member 18 is achieved with a simple configuration.
[0034]
Further, when the front part of the seat 34 is supported on the cross member 18 as described above, a large external force is applied downward from the seat 34 or the like to the cross member 18 at the time of “front impact”. Therefore, the external force applied from the cross member 18 to the side sill 14 also faces downward.
[0035]
Here, in the case where the end 18a of the cross member 18 is merely brought into contact with the longitudinal inner side surface of the side sill 14 and spot welding S2 is performed, the external force of the cross member 18 against the side sill 14 is applied by the downward external force. Shear stress is generated in the joint portion of the end portion 18a, and the end portion 18a of the cross member 18 tends to be easily peeled off from the side sill 14.
[0036]
Therefore, as described above, the end portion 18a of the cross member 18 and a part of the reinforcing plate 25 are overlapped with each other on the upper surface of the side sill 14, and these are coupled to each other. When an external force is applied to the cross member 18, the end portion 18a of the cross member 18 is pressed against the side sill 14, and the end portion 18a of the cross member 18 from the side sill 14 is more reliably prevented. Is done.
[0037]
Therefore, the support of the sheet 34 by the cross member 18 is further strengthened.
[0038]
Although the above description is based on the illustrated example, the rear cross member 19 may not be provided. In this case, the rear portion of the seat 34 is directly supported on the floor panel 23 via the seat support means 33. You may let them.
[0039]
【The invention's effect】
The effects of the present invention are as follows.
[0040]
According to the first aspect of the present invention, the vehicle body frame has a pair of left and right side sills extending along the longitudinal direction of the vehicle body, and extends in the vehicle width direction so that each end in the longitudinal direction is a midway portion in the longitudinal direction of each side sill. A cross panel that is coupled to each other, and is provided with a floor panel that extends substantially horizontally between the two side sills, and whose edge in the vehicle width direction is coupled to the corresponding side sill. A reinforcing plate is provided to connect the middle part of the direction to the cross member, and the side sill and the edge of the floor panel connected to the side sill, and the cross member supports the seat. In a car
[0041]
The reinforcing plate integrally extends in the vehicle width direction from the lower end edge of the longitudinally extending piece in the vehicle width direction toward the vehicle body center side, with the longitudinally extending piece having a substantially L-shaped cross section. A horizontal piece, the vertical piece is joined to the side sill by spot welding, the horizontal piece is joined to the end of the floor panel in the vehicle width direction by spot welding, the side sill, the end of the cross member, Each part of the reinforcing plate is overlapped with each other in the vehicle width direction and joined by spot welding .
[0042]
For this reason, the joint between the side sill and the end of the cross member that supports the sheet is strongly reinforced by the reinforcing plate. At the time of “front collision”, the impact force at that time, the sheet, and the sheet A large external force due to the inertial force with the seated person is applied to the cross member. However, due to the reinforcement, a large stress may be generated at the joint between the side sill and the end of the cross member that supports the seat. This prevents the end portion of the cross member from the side sill more reliably.
[0043]
Therefore, the sheet is supported more firmly by the cross member.
[0044]
In addition, the reinforcing plate is provided to prevent peeling of the edge of the floor panel from the side sill, but the reinforcing plate is used to prevent peeling of the end of the cross member from the side sill. For this reason, the reinforcement of the joint portion between the side sill and the end of the cross member can be achieved by a simple structure.
[0045]
That is, the strong support of the sheet by the cross member is achieved with a simple configuration.
[0046]
According to a second aspect of the present invention, the front portion of the sheet is supported by the cross member, and the end portion of the cross member and each part of the reinforcing plate are overlapped and bonded to the upper surface of the side sill. The effect of.
[0047]
That is, when the front part of the seat is supported by the cross member as described above, a large external force is applied downward from the seat or the like to the cross member at the time of “front impact”. The external force applied to the side sill from the member will also be directed downward.
[0048]
Here, in the case where the end of the cross member is merely abutted against the longitudinal inner surface of the side sill and spot welded, the joint of the end of the cross member to the side sill is caused by the downward external force. Shear stress is generated, and the end of the cross member tends to be easily peeled off from the side sill.
[0049]
Therefore, as described above, the end portion of the cross member and each part of the reinforcing plate are overlapped and joined to the upper surface of the side sill, and therefore, an external force directed downward is applied to the cross member. When this occurs, the end of the cross member comes into pressure contact with the side sill, and the end of the cross member from the side sill is more reliably prevented.
[0050]
Therefore, the sheet is more firmly supported by the cross member.
[Brief description of the drawings]
FIG. 1 is a perspective view of a coupling portion at an end of a cross member to a side sill.
FIG. 2 is a simplified side view of the entire automobile.
FIG. 3 is a simplified plan view of the entire automobile.
4 is a cross-sectional view taken along line 4-4 of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Car 2 Car body 3 Car body frame 4 Car body main body 14 Side sill 18 Cross member 18a End part 19 Cross member 23 Floor panel 23a End edge 25 Reinforcement board 30 Car interior 33 Seat support means 34 Seat 38 Outer panel 51 Superposition part

Claims (2)

The vehicle body frame (3) has a pair of left and right side sills (14, 14) extending along the front-rear direction of the vehicle body (2) , and each end portion (18a) in the longitudinal direction extends in the vehicle width direction. (14) and a cross member (18) coupled to a midway portion in the longitudinal direction, extending substantially horizontally between the side sills (14, 14) , and having respective end edges (23a) in the vehicle width direction. A floor panel (23) coupled to each side sill (14) corresponding thereto is provided, a midway portion in the front-rear direction of the floor panel (23 ) is coupled to the cross member (18) , and the side sill ( 14) and a reinforcing plate (25) for connecting the edge (23a ) of the floor panel (23) connected thereto to each other, and a sheet (34) is supported by the cross member (18) The It was in the vehicle (1),
The reinforcing plate (25) has a longitudinally extending piece (48) having a substantially L-shaped cross section and extending in a substantially vertical direction, and a vehicle body center (in the vehicle width direction from the lower end edge of the longitudinally facing piece (48)). 12) a laterally extending piece (49) integrally extending toward the side, and the longitudinally facing piece (48) is coupled to the side sill (14) by spot welding (S9), and the laterally facing piece (49). Are joined to the end of the floor panel (23) in the vehicle width direction by spot welding (S6, S10), the side sill (14) , the end (18a) of the cross member (18 ) , and the reinforcing plate (25). A support / reinforcement structure for an automobile seat in which a part of each is overlapped with each other in the vehicle width direction and joined by spot welding (S2) . 2. The automobile seat according to claim 1, wherein the front part of the seat is supported by the cross member, and an end part of the cross member and each part of the reinforcing plate are overlapped and joined to the upper surface of the side sill. Support reinforcement structure.

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