Vehicle seat fixing structure

Abstract

To suppress displacement of a vehicle seat at the time of vehicle collision.SOLUTION: A vehicle 10 has a cabin side bracket 20, a seat side bracket 40, a fastening fixation member 50, and a seat rail 132. The cabin side bracket 20 has a first fixed part 21, and a first fastening hole provided below the first fixed part 21. The seat side bracket 40 has a second fixed part 41, and a second fastening hole provided below the second fixed part 41. The fastening fixation member 50 has: a rod-shaped part 51 which extends in a vehicle width direction in a manner of penetrating the first fastening hole and the second fastening hole; and fastening parts 52 provided on the rod-shaped part 51 in a manner of pinching the respective bracket 20, 40. The seat rail 132 is located on a vehicle upper side of a wall side part 51W in the rod-shaped part 51. When an end part 511 of the rod-shaped part 51 moves to the vehicle upper side at the time of collision of the vehicle 10, the seat rail 132 is pressed by the end part 511.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fixing structure for a vehicle seat. [Background technology]

[0002] In a vehicle such as an automobile, a vehicle seat for a passenger to sit in is fixed inside the cabin (see Patent Document 1). In the vehicle described in Patent Document 1, the side of the vehicle seat is fixed to a frame member that forms part of the side wall of the cabin.

[0003] In order to firmly fix a vehicle seat, it is preferable that the vehicle seat be directly fixed to a frame member of the vehicle. However, due to space limitations within the cabin, it may be necessary to offset the fixing portion for fixing the vehicle seat below the frame member. In this case, as illustrated in FIG. 9, it is possible to fix the vehicle seat (hereinafter referred to as seat 811) to a side wall 813 of the cabin. As shown in FIG. 9, the vehicle 810 has a cabin-side bracket 820 and a seat-side bracket 840. The cabin-side bracket 820 and the seat-side bracket 840 extend in the vertical direction of the vehicle. The cabin-side bracket 820 has a first fixing portion 821 fixed to a side wall 813 of the cabin 812 (in this example, the frame member), and a first fastening hole (not shown) below the first fixing portion 821 and used for fastening to the seat-side bracket 840. The seat-side bracket 840 has a second fixing portion 841 fixed to the side of the seat 811 (seat frame 815 in this example), and a second fastening hole (not shown) used to fasten the seat-side bracket 840 to the cabin-side bracket 820 below the second fixing portion 841. In this vehicle 810, a male screw member 851 is inserted through the first fastening hole and the second fastening hole, and a female screw member 852 is screwed into the male screw member 851. This fastens the cabin-side bracket 820 and the seat-side bracket 840 together. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3247064 Summary of the Invention [Problem to be solved by the invention]

[0005] By employing the above-described fixing structure, it becomes possible to fix the side of the seat 811 to the side wall 813 of the cabin 812 even if the space inside the cabin 812 is limited.

[0006] However, in the above fixing structure, the first fixing portion 821 of the cabin-side bracket 820 is spaced apart from the first fastening hole for fastening. Also, the second fixing portion 841 of the seat-side bracket 840 is spaced apart from the second fastening hole for fastening. Therefore, when force is applied to the seat 811 during a collision of the vehicle 810, the structure is such that the brackets 820 and 840 are likely to be deformed.

[0007] In this case, as shown by arrow D in Figure 9, the first fixing portion 821 of the cabin-side bracket 820 and the second fixing portion 841 of the seat-side bracket 840 may move away from each other, possibly causing deformation of the brackets 820, 840. In this case, the seat 811 fixed to the seat-side bracket 840 may be displaced so as to collapse inward into the cabin 812. It is desirable for the vehicle 810 to be able to suppress such displacement of the seat 811 during a collision. [Means for solving the problem]

[0008] Various aspects of the device for solving the above problems will be described. [Aspect 1] A fixing structure for a vehicle seat in which a side portion of the vehicle seat is fixed to a side wall of a cabin of a vehicle, the fixing structure comprising: a cabin-side bracket having a shape extending in the vertical direction of the vehicle and having a first fixing portion fixed to the side wall and a first fastening hole for fastening provided below the first fixing portion; a seat-side bracket having a shape extending in the vertical direction of the vehicle and having a second fixing portion fixed to the side portion and a second fastening hole for fastening provided below the second fixing portion; and a rod-shaped bracket passing through the first fastening hole and the second fastening hole. A fixing structure for a vehicle seat, comprising: a fastening fixing member having a rod-shaped portion extending in the vehicle width direction and a fastening portion provided on the rod-shaped portion in a manner that sandwiches the cabin side bracket and the seat side bracket; and a deformation control member that forms part of the side wall, located at a position above the vehicle on the side wall side of the rod-shaped portion relative to the second fastening hole, and that is positioned so that it will be pressed by the portion of the rod-shaped portion when the deformation mode during a collision of the vehicle is a deformation mode in which the end of the rod-shaped portion on the side wall side moves toward the vehicle above.

[0009] In the above configuration, if the end of the rod-shaped portion moves upward in response to displacement of the fastening member during a vehicle collision, once the end moves to a certain extent, the deformation-restricting member is directly or indirectly pressed by the portion of the rod-shaped portion on the side wall (hereinafter referred to as the wall-side portion). According to the above configuration, the deformation-restricting member can support the rod-shaped portion in a manner that resists the pressure from the rod-shaped portion. This prevents further displacement of the rod-shaped portion of the fastening member, thereby preventing displacement of the seat-side bracket on which the fastening member is mounted and the vehicle seat. According to the above configuration, displacement of the vehicle seat during a vehicle collision can thus be prevented.

[0010] [Aspect 2] The deformation restriction member has a lower end provided with a protrusion that protrudes downward toward the bottom of the vehicle, in the vehicle seat fixing structure described in [Aspect 1]. According to the above configuration, the protrusion can fill a part of the gap between the wall portion of the rod-shaped portion of the fastening member and the lower end of the deformation-restricting member. Therefore, when the fastening member is displaced during a vehicle collision, the fastening member can be supported by the deformation-restricting member early, at a timing when the amount of displacement is small. Therefore, displacement of the vehicle seat during a vehicle collision can be kept small.

[0011] [Aspect 3] A fixing structure for a vehicle seat according to [Aspect 1] or [Aspect 2], wherein the deformation-restricting member is a reinforcing member that reinforces the side wall. According to the above configuration, displacement of the fastening member can be suppressed by utilizing the reinforcing member provided in the side wall of the cabin without adding a new member. [Effects of the Invention]

[0012] According to the present invention, displacement of a vehicle seat during a vehicle collision can be suppressed. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a front cross-sectional view showing a fixing structure for a vehicle seat according to an embodiment of the present invention; [Figure 2] FIG. [Figure 3] 10 is a side view of the seat rail, the cabin-side bracket, and the plate according to the fixing structure. FIG. [Figure 4] FIG. [Figure 5] 4 is a side cross-sectional view of a seat rail and a protrusion in the fixing structure. FIG. [Figure 6] 10A and 10B are diagrams illustrating the operation of the fixing structure. [Figure 7] FIG. 10 is a front cross-sectional view showing a fixing structure for a vehicle seat according to another embodiment. [Figure 8] FIG. 10 is a front cross-sectional view showing a fixing structure for a vehicle seat according to another embodiment. [Figure 9]1 is a schematic diagram showing an example of a conventional fixing structure for a vehicle seat. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, a fixing structure for a vehicle seat according to one embodiment will be described with reference to FIGS. <Vehicle> As shown in FIG. 1, a vehicle seat (hereinafter referred to as seat 11) of this embodiment is provided in a cabin 12 of a vehicle 10. In this embodiment, the vehicle 10 is a bus. The seat 11 is a passenger seat of the vehicle 10. The seat 11 is located on the right side of the vehicle inside the cabin 12. The seat 11 is located near a side wall of the cabin 12 (hereinafter referred to as cabin side wall 13).

[0015] The seat 11 is fixed to the inner wall of the cabin 12 at a total of four locations: two locations on the cabin side wall 13 side (the right side of the vehicle) and two locations on the side away from the cabin side wall 13 (the left side of the vehicle). Specifically, on the right side of the seat 11, a side portion 14 of the seat 11 is fixed to the cabin side wall 13 at two locations spaced apart in the longitudinal direction of the vehicle. On the left side of the seat 11, a lower portion of the seat 11 is fixed to the bottom wall of the cabin 12, i.e., the floor of the vehicle 10, at two locations spaced apart in the longitudinal direction of the vehicle. Note that FIGS. 1 to 6 show only one of the four fixing locations, specifically, only the fixing location on the front side of the vehicle of the two fixing locations on the right side of the seat 11.

[0016] In the vehicle 10 of this embodiment, a small window (not shown) is provided in the cabin side wall 13 in a portion corresponding to the feet of the seat 11. In the vehicle 10, the space for arranging the small window limits the space available for fixing the seat 11. In the vehicle 10 of this embodiment, the side portion 14 of the seat 11 is fixed to the cabin side wall 13 under the circumstances where the space inside the cabin 12 is limited.

[0017] The fixing structure of the seat 11 will be described in detail below. As shown in FIGS. 1 to 4, the vehicle 10 has, as members used to fasten the seat 11, a cabin-side bracket 20, a plate 30, a seat-side bracket 40, and a fastening member 50.

[0018] <Cabin side bracket> The cabin side bracket 20 is made of a steel plate. The cabin side bracket 20 extends in the vertical direction of the vehicle. The cabin side bracket 20 has a hat-shaped cross section that opens on the right side of the vehicle (the left side in FIG. 2). The cabin side bracket 20 has a first fixing portion 21. The first fixing portion 21 is shaped to protrude above the vehicle at the upper end of the cabin side bracket 20. The first fixing portion 21 has a triangular plate shape that extends in the vertical direction and the longitudinal direction of the vehicle. The first fixing portion 21 is welded (fixed) to the cabin side wall 13. This fixes the upper part of the cabin side bracket 20 to the cabin side wall 13.

[0019] The cabin side wall 13 has a panel portion 131 and a seat rail 132. The panel portion 131 and the seat rail 132 are made of steel plate. The panel portion 131 has a shape that extends in the vehicle up-down direction and the vehicle front-rear direction. The seat rail 132 extends in the vehicle front-rear direction. The seat rail 132 has a hat-shaped cross section that opens on the right side of the vehicle (the left side in FIG. 2 ). The seat rail 132 is welded (fixed) to a portion of the panel portion 131 on the cabin 12 side so as to close the opening on the right side of the vehicle. In this embodiment, the seat rail 132 corresponds to a reinforcing member that reinforces the cabin side wall 13.

[0020] The first fixing portion 21 of the cabin side bracket 20 is fixed to a portion of the seat rail 132 on the inside of the cabin 12. The lower portion of the cabin side bracket 20 is welded (fixed) to a portion of the cabin side wall 13 on the inside of the cabin 12. In this manner, in this embodiment, the upper and lower portions of the cabin side bracket 20 are fixed to the cabin side wall 13.

[0021] The cabin side bracket 20 has a first fastening hole 22 (FIG. 2). The first fastening hole 22 is a through-hole that passes through the cabin side bracket 20 in the vehicle width direction. The first fastening hole 22 is provided at a position further down the vehicle than the first fixing portion 21. The first fastening hole 22 is provided at a position further down the vehicle than the seat rail 132. The first fastening hole 22 is used to fasten the cabin side bracket 20 and the seat side bracket 40 together.

[0022] <Plate 30> The plate 30 is made of a steel plate. The plate 30 has a shape that extends in the vehicle vertical direction and the vehicle longitudinal direction. The plate 30 is provided in a manner that covers the first fixing portion 21 of the cabin-side bracket 20 and its surrounding area from the inside side of the cabin 12 (the right side in FIG. 2 ). The plate 30 is welded (fixed) to each of the cabin-side bracket 20 and the seat rail 132.

[0023] The plate 30 has fastening holes 31 (FIG. 2). The fastening holes 31 are provided at positions corresponding to the first fastening holes 22 of the cabin-side bracket 20. When the plate 30 is fixed to the cabin-side bracket 20, the fastening holes 31 of the plate 30 and the first fastening holes 22 of the cabin-side bracket 20 are in communication with each other. The fastening holes 31 are used to fasten the cabin-side bracket 20 and the seat-side bracket 40 together.

[0024] <Seat side bracket> The seat side bracket 40 is made of a metal plate. The seat side bracket 40 extends in the vertical direction of the vehicle. The seat side bracket 40 has a U-shaped cross section that opens on the left side of the vehicle (the right side in Figure 2). The portion of the seat side bracket 40 on the upper side of the vehicle forms a second fixing portion 41. The second fixing portion 41 of the seat side bracket 40 is the portion that is fixed to the side portion 14 of the seat 11.

[0025] The seat 11 has a seat frame 15 that forms the skeleton thereof. The seat frame 15 has a pipe portion 151. The pipe portion 151 is arranged inside a seat portion 111 of the seat 11. The pipe portion 151 extends in the vehicle width direction at the front end portion of the seat portion 111. An end portion of the pipe portion 151 on the right side of the vehicle is fixed integrally to the second fixing portion 41 of the seat side bracket 40. In this embodiment, the upper portion of the seat side bracket 40 is fixed to the side portion 14 of the seat 11 in this manner.

[0026] The seat-side bracket 40 has a second fastening hole 42 (FIG. 2). The second fastening hole 42 is a through-hole that passes through the seat-side bracket 40 in the vehicle width direction. The second fastening hole 42 is provided at a position further down the vehicle than the second fixing portion 41. The second fastening hole 42 is provided at a position further down the vehicle than the pipe portion 151 of the seat frame 15. The second fastening hole 42 is used to fasten the seat-side bracket 40 and the cabin-side bracket 20 together.

[0027] <Fastening and fixing components> As shown in FIGS. 1, 2 and 4, the fastening member 50 has a rod-shaped portion 51 and a fastening portion 52.

[0028] The rod-shaped portion 51 has a rod shape that extends in the vehicle width direction. A male thread is formed on the outer surface of the rod-shaped portion 51. The rod-shaped portion 51 is arranged so as to pass through the first fastening hole 22 of the cabin-side bracket 20, the fastening hole 31 of the plate 30, and the second fastening hole 42 of the seat-side bracket 40. In this embodiment, a spacer 32 is provided between the cabin-side bracket 20 and the seat-side bracket 40. This spacer 32 has a cylindrical shape. The rod-shaped portion 51 is arranged so as to pass through the center hole of this spacer 32.

[0029] The fastening portion 52 is configured by a pair of female screw members 521, 522. The female screw members 521, 522 are screwed into the rod-shaped portion 51 in a manner that sandwiches the cabin-side bracket 20, the plate 30, and the seat-side bracket 40 therebetween.

[0030] 2, in vehicle 10, rod-shaped portion 51 is inserted through first fastening hole 22 of cabin-side bracket 20, fastening hole 31 of plate 30, the center hole of spacer 32, and second fastening hole 42 of seat-side bracket 40. In this state, rod-shaped portion 51, an internally threaded member 521 at one end (left side in FIG. 2) of rod-shaped portion 51, and an internally threaded member 522 at the other end (right side in FIG. 2) of rod-shaped portion 51 are fastened together. In this embodiment, the cabin-side bracket 20 and the seat-side bracket 40 are fastened together by fastening member 50.

[0031] In this embodiment, in order to suppress displacement of the seat 11 when the vehicle 10 collides, the positional relationship between the rod-shaped portion 51 of the fastening member 50 and the seat rail 132 is determined as follows.

[0032] The rod-shaped portion 51 of the fastening fixing member 50 extends in the vehicle width direction. A portion of the rod-shaped portion 51 on the cabin side wall 13 side of the second fastening hole 42 of the cabin-side bracket 20 (hereinafter referred to as the wall-side portion 51W) extends to the vicinity of a panel portion 131 that constitutes part of the cabin side wall 13. More specifically, the wall-side portion 51W of the rod-shaped portion 51 extends to the vicinity of a fixed portion between the panel portion 131 and a seat rail 132. The seat rail 132 is arranged on the vehicle upper side of the wall-side portion 51W of the rod-shaped portion 51. The seat rail 132 and the end portion 511 of the rod-shaped portion 51 are arranged with an interval between them in the vehicle up-down direction.

[0033] Among the deformation modes during a collision of the vehicle 10, a deformation mode in which the end 511 of the rod-shaped portion 51 on the cabin side wall 13 side moves toward the upper side of the vehicle is referred to as a "specific deformation mode." The seat rail 132 is disposed in a position in which the wall side portion 51W (in this embodiment, the end 511) of the rod-shaped portion 51 presses the lower portion of the seat rail 132 in the specific deformation mode.

[0034] In this embodiment, the positional relationship between the rod-shaped portion 51 of the fastening member 50 and the seat rail 132 is determined so as to appropriately suppress displacement of the rod-shaped portion 51, and therefore displacement of the seat 11, in the event of a collision of the vehicle 10. The positional relationship is determined in advance based on the results of various experiments and simulations conducted by the inventors, etc. In this embodiment, the seat rail 132 corresponds to the deformation-restricting member.

[0035] <Convex part> As shown in Figures 1, 4 and 5, the seat rail 132 is provided with a protrusion 60. The protrusion 60 is shaped to protrude from the lower end of the seat rail 132 toward the bottom of the vehicle. The protrusion 60 is shaped like a staircase, with a large protrusion amount at the center in the vehicle longitudinal direction and relatively small protrusion amounts at the front and rear in the vehicle longitudinal direction. The protrusion 60 is provided at a position on the seat rail 132 that corresponds to the vehicle upper side of the rod-shaped portion 51.

[0036] The protrusion 60 has a structure in which two steel plates are overlapped. More specifically, a reinforcing portion 61 is fixed to the inner portion of the hat-shaped cross section of the portion of the seat rail 132 where the protrusion 60 is provided. The reinforcing portion 61 is made of a steel plate. The reinforcing portion 61 has a U-shaped cross section and extends in the front-to-rear direction of the vehicle. The reinforcing portion 61 has a protrusion that is shaped to correspond to the protrusion 60. The reinforcing portion 61 is welded (fixed) to the inside of the seat rail 132 in such a manner that the portion of the seat rail 132 where the protrusion 60 is provided and its surrounding area have a structure in which two steel plates are overlapped. In this embodiment, the protrusion 60 is reinforced by providing such a reinforcing portion 61.

[0037] <effect> The function of the fixing structure of this embodiment will be described. As shown in Fig. 6, in the event of a collision of vehicle 10, a force (a force indicated by arrow A in Fig. 6) may act to push the front of seat 11 downward toward the vehicle. In this case, as indicated by arrow B in Fig. 6, seat-side bracket 40 together with seat 11 will be displaced in a manner that causes them to fall toward the inside of cabin 12, with the portion fixed by fastening member 50 as a fulcrum. Then, when seat-side bracket 40 is displaced in this manner, as indicated by arrow C in Fig. 6, fastening member 50 will be displaced in a manner that causes end 511 of rod-shaped portion 51 to move upward toward the vehicle, with the portion fixed by fastening member 50 as a fulcrum.

[0038] According to this embodiment, when the end 511 of the rod-shaped portion 51 moves upward to a certain extent, the end 511 comes into contact with the lower surface of the seat rail 132, more specifically, the lower surface of the protrusion 60 provided on the seat rail 132. At this time, the end 511 of the rod-shaped portion 51 presses against the protrusion 60 and the lower portion of the seat rail 132.

[0039] According to this embodiment, at this time, the seat rail 132 can support the rod-shaped portion 51 in a manner that resists the pressure from the end portion 511 of the rod-shaped portion 51. In this embodiment, since the protrusion 60 is reinforced by the reinforcing portion 61, the rod-shaped portion 51 of the fastening fixing member 50 can be firmly supported by this protrusion 60.

[0040] In this way, the rod-shaped portion 51 of the fastening member 50 is supported by the protrusion 60 and the seat rail 132, which prevents the end 511 of the rod-shaped portion 51 from further displacing upward in the vehicle. This prevents the seat-side bracket 40, which is fastened and fixed by the fastening member 50, from being displaced, thereby preventing the seat 11, which is fixed to the seat-side bracket 40. According to this embodiment, it is possible to prevent the seat 11 from being displaced in the event of a collision of the vehicle 10.

[0041] <Action and effect> According to the fixing structure of this embodiment, the following effects can be obtained. (1) When the deformation mode of the vehicle 10 during a collision is a specific deformation mode in which the end 511 of the rod-shaped portion 51 moves toward the upper side of the vehicle, the seat rail 132 is disposed at a position where the end 511 presses the seat rail 132. Therefore, it is possible to suppress displacement of the seat 11 during a collision of the vehicle 10.

[0042] (2) The lower end of the seat rail 132 is provided with a protrusion 60 that protrudes downward toward the vehicle. According to this embodiment, the protrusion 60 can fill a part of the gap (indicated by W in FIG. 1 ) between the wall portion 51W of the rod-shaped portion 51 and the lower end of the seat rail 132. As a result, when the fastening member 50 is displaced during a collision of the vehicle 10, the end 511 of the rod-shaped portion 51 presses the seat rail 132 (the state shown in FIG. 6 ) early when the amount of displacement of the fastening member 50 is small. Therefore, the fastening member 50 can be supported by the seat rail 132 early when the amount of displacement of the fastening member 50 is small. Therefore, compared to a fixing structure without the protrusion 60, the displacement of the seat 11 during a collision of the vehicle 10 can be kept small.

[0043] (3) The seat rails 132, which are reinforcing members that reinforce the cabin side walls 13, are used as deformation-restricting members that suppress displacement of the fastening members 50. According to this embodiment, displacement of the fastening members 50 can be suppressed by utilizing the reinforcing members that the cabin side walls 13 have, without adding any new members.

[0044] <Example of change> The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other within the scope of technical compatibility.

[0045] The shape of the cabin side bracket 20 and the seat side bracket 40 can be changed as desired, such as to have an L-shaped cross section that extends in the vertical direction of the vehicle, or to have a shape with a reinforcing protrusion or recess.

[0046] The plate 30 and the spacer 32 can be omitted. The shape of the protrusion 60 can be changed as desired, for example, to a cylindrical shape or a rectangular parallelepiped shape.

[0047] The reinforcing portion 61 can be omitted. The protrusion 60 can be omitted. In this configuration, the positional relationship between the seat rail 132 and the rod-shaped portion 51 of the fastening member 50 can be determined as follows: The seat rail 132 can be positioned above the vehicle relative to the wall-side portion 51W of the rod-shaped portion 51. Specifically, the seat rail 132 can be positioned so that the end 511 of the rod-shaped portion 51 abuts against the underside of the seat rail 132 when the rod-shaped portion 51 is displaced due to a collision of the vehicle 10.

[0048] As shown in an example in Fig. 7, a protruding member 70 that protrudes toward the seat rail 132 may be provided on the wall portion 51W of the rod-shaped portion 51. In the example shown in Fig. 7, a ring-shaped protruding member 70 is provided on the end portion 511 of the rod-shaped portion 51 so that the rod-shaped portion 51 is inserted into a center hole. With this configuration, the protruding member 70 can fill a part of the gap (indicated by W in Fig. 7) between the wall portion 51W of the rod-shaped portion 51 and the lower end of the seat rail 132. Therefore, compared to a fixed structure without the protruding member 70, the displacement of the seat 11 in the event of a collision of the vehicle 10 can be kept small.

[0049] As shown in an example in Figure 8, an intermediate member 75 may be disposed between the seat rail 132 and the wall portion 51W of the rod-shaped portion 51. The intermediate member 75 may have any shape, such as a plate or a square pillar. With this configuration, the intermediate member 75 can fill a part of the gap (indicated by W in Figure 8) between the wall portion 51W of the rod-shaped portion 51 and the lower end of the seat rail 132.

[0050] Instead of using the seat rails 132 as the deformation restriction members, it is possible to use reinforcing members other than the seat rails 132. Furthermore, in addition to using reinforcing members such as the seat rails 132, it is also possible to use frame members of the vehicle 10 as the deformation restriction members.

[0051] The fastening member 50 can be modified as desired. For example, a fastening member having a bolt and a nut can be used. In this configuration, the male threaded portion of the bolt corresponds to the rod portion, and the bolt head and the nut correspond to the fastening portion.

[0052] The vehicle seat fixing structure according to the above embodiment can also be applied to vehicles other than buses, such as passenger cars and trucks. [Explanation of symbols]

[0053] 10 vehicles 11 sheets 111 Seat area 12 Cabins 13 Cabin sidewall 131 Panel section 132 seat rail 14 Side 15 seat frame 151 Pipe section 20 Cabin side bracket 21 1st fixed part 22 1st fastening hole 30 plates 31 Fastening hole 32 spacer 40 Seat side bracket 41 Second fixed part 42 2nd fastening hole 50 Fastening and fixing member 51 Rod-shaped part 511 End 51W wall side part 52 Fastening part 521,522 Female thread member 60 Convex part 61 Reinforcement 70 Protruding member 75 Intermediate parts 810 vehicles 811 Vehicle seats 812 Cabin 813 Side wall 815 seat frame 820 Cabin side bracket 821 1st fixed part 840 seat side bracket 841 2nd fixed part 851 Male threaded member 852 Female thread member

Claims

1. A vehicle seat fixing structure in which a side portion of a vehicle seat is fixed to a side wall of a cabin of a vehicle, a cabin-side bracket having a shape extending in the vehicle up-down direction, and including a first fixing portion fixed to the side wall, and a first fastening hole for fastening and fixing provided below the first fixing portion on the vehicle; a seat-side bracket having a shape extending in the vehicle up-down direction and including a second fixing portion fixed to the side portion and a second fastening hole for fastening and fixing the seat-side bracket and provided below the second fixing portion; a fastening fixing member having a rod-shaped portion extending in the vehicle width direction while passing through the first fastening hole and the second fastening hole, and a fastening portion provided on the rod-shaped portion while sandwiching the cabin-side bracket and the seat-side bracket; a deformation restriction member that constitutes a part of the side wall, the deformation restriction member being located at a position on the vehicle upper side of a portion of the rod-shaped portion that is closer to the side wall than the second fastening hole, and that is positioned so as to be pressed by the portion of the rod-shaped portion when a deformation mode in the event of a collision of the vehicle is a deformation mode in which an end of the rod-shaped portion on the side wall moves toward the vehicle upper side; A vehicle seat fixing structure comprising:

2. The deformation restricting member has a protrusion at its lower end that protrudes downward toward the vehicle. The vehicle seat fixing structure according to claim 1.

3. The deformation restricting member is a reinforcing member that reinforces the side wall. The vehicle seat fixing structure according to claim 1 or 2.

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