Seat mounting structure

Abstract

To improve rigidity and strength of a fixing member effectively in a seat attachment structure having the fixing member which fixes a seat or a rail member attached to the seat to a vehicle body floor or a rail member attached to the vehicle body floor.SOLUTION: A seat attachment structure 2 includes: first rail members 20 attached to a seat part 3; second rail members 21 each of which guides the first rail member 20 in a manner that the first rail member 20 may move in a first direction relative to a vehicle body floor 4; and fixing members 40 which fix the second rail member 21 to an attachment surface 6a. Each fixing member 40 includes: a first joint part 40a joined to the second rail member 21; a second joint part 40b joined to the attachment surface 6a; and two or more connection parts 40c, 40d which connect the first joint part 40a with the second joint part 40b.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a seat mounting structure. [Background technology]

[0002] As a seat mounting structure for mounting a seat portion to a vehicle floor, for example, Patent Document 1 discloses a lower rail unit that is mounted to the vehicle floor via a bracket. This bracket has an L-shaped cross section, supports the lower rail unit from above, and connects the vehicle floor and the lower rail unit at a single connecting portion. This bracket is made of an aluminum extrusion that is extruded so as to extend in the left-right direction of the vehicle, and is intended to ensure strength by forming ribs at the inner corners of the bent portion that is bent at a predetermined angle to thicken the bent portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 5-49464 Summary of the Invention [Problem to be solved by the invention]

[0004] In the bracket of Patent Document 1, a single connection is used to connect the vehicle floor and the lower rail unit, which means that stress tends to concentrate at the bent portion due to loads in the longitudinal and vertical directions. If the ribs at the inner corners were enlarged to further thicken the bent portion in order to further increase the rigidity and strength of the bracket, this would result in an increase in the weight and size of the bracket. Furthermore, it is not possible to stiffen the bent portion beyond the maximum thickness ratio allowed by manufacturing. Therefore, there is room for improvement in effectively increasing the rigidity and strength of the bracket.

[0005] The present invention aims to effectively increase the rigidity and strength of a fixing member in a seat mounting structure having a fixing member that fixes a seat or a rail member attached to the seat to a vehicle floor or a rail member attached to the vehicle floor. [Means for solving the problem]

[0006] One aspect of the present invention provides a seat mounting structure comprising a first rail member attached to a seat portion, a second rail member that guides the first rail member movably in a first direction relative to the vehicle floor, and a fixing member that fixes the second rail member to a mounting surface, wherein the fixing member comprises a first joint portion joined to the second rail member, a second joint portion joined to the mounting surface, and two or more connection portions that connect the first joint portion and the second joint portion.

[0007] According to the present disclosure, the second rail member is immovably fixed to the mounting surface via a fixing member. The fixing member is configured by connecting the first joint and the second joint with two or more connecting parts. Therefore, stress concentration can be suppressed compared to when the first joint and the second joint are connected with a single connecting part. Therefore, the rigidity and strength of the fixing member can be effectively increased.

[0008] The mounting surface may be provided on the vehicle floor.

[0009] According to the above configuration, the second rail member can be attached to the vehicle floor via the fixing member, and the second rail member and the vehicle floor are firmly joined by the fixing member, which can improve the stability of the seat.

[0010] The slide rail structure may further include a third rail member and a fourth rail member that guides the third rail member movably in a second direction perpendicular to the first direction, and the mounting surface may be provided on the third rail member.

[0011] According to the above configuration, the second rail member can be attached to the third rail member via the fixing member. Therefore, the seat portion can slide in the first direction and the second direction. Furthermore, since the second rail member and the third rail member are firmly joined by the fixing member, the stability of the seat portion can be improved.

[0012] Another aspect of the present invention provides a seat mounting structure comprising a horizontal frame attached to a seat portion, a fixed member attached to the horizontal frame, a third rail member attached to the fixed member, and a fourth rail member fixed to a vehicle floor and movably guiding the third rail member, wherein the fixed member comprises a first joint portion joined to the horizontal frame, a second joint portion joined to the third rail member, and two or more connection portions connecting the first joint portion and the second joint portion.

[0013] According to the present disclosure, the seat is fixed to the third rail member via a fixing member. The fixing member is configured by connecting the first joint and the second joint with two or more connecting parts. Therefore, stress concentration can be suppressed compared to when the first joint and the second joint are connected with a single connecting part. Therefore, the rigidity and strength of the fixing member can be effectively increased.

[0014] Another aspect of the present invention provides a seat mounting structure comprising a horizontal frame attached to a seat portion, and a fixing member attached to the horizontal frame and a vehicle floor for fixing the seat portion to the vehicle floor, the fixing member comprising a first joint joined to the horizontal frame, a second joint joined to the vehicle floor, and two or more connection portions connecting the first joint and the second joint.

[0015] According to the present disclosure, the seat is fixed to the vehicle floor via a fixing member. The fixing member is configured by connecting a first joint and a second joint with two or more connecting parts. Therefore, stress concentration can be suppressed compared to when the first joint and the second joint are connected with a single connecting part. Therefore, the rigidity and strength of the fixing member can be effectively increased.

[0016] The fixing member may have a closed cross-sectional shape in a cross section along the vehicle vertical direction.

[0017] According to the above-described configuration, the fixing member can support a horizontal load with a strong closed cross-sectional shape, which can suppress horizontal deformation of the fixing member, thereby improving the rigidity and strength of the fixing member against horizontal loads.

[0018] The fixing member may have a closed cross-sectional shape in a cross section perpendicular to the vehicle longitudinal direction.

[0019] According to the above configuration, the fixing member can support the load in the vehicle longitudinal direction with a strong closed cross-sectional shape. Therefore, deformation of the fixing member in the vehicle longitudinal direction can be suppressed. That is, the rigidity and strength of the fixing member against the load in the vehicle longitudinal direction can be improved. By improving the rigidity and strength of the fixing member against the load in the vehicle longitudinal direction, the stability of the seat can be improved.

[0020] The closed cross-sectional shape may be a triangle.

[0021] According to the above configuration, the fixing member can have a truss structure, which can improve the rigidity and strength of the fixing member.

[0022] The closed cross-sectional shape may be rectangular.

[0023] According to the above-described configuration, a large internal space can be secured within the fixing member, which can facilitate attachment of the fixing member.

[0024] The fixing member may be an aluminum alloy extrusion.

[0025] According to the above-described configuration, the closed cross-sectional shape can be easily formed integrally by extruding the aluminum alloy material.

[0026] The two or more connecting portions, the first joining portion, and the second joining portion may each be configured in a plate shape, and the plate thickness of each of the two or more connecting portions may be thicker than the plate thickness of each of the first joining portion and the second joining portion.

[0027] According to the above configuration, the strength of the fixing member can be efficiently improved. As described above, the first and second joints are parts that are joined to other members, and therefore exhibit high rigidity when integrated with the other members. However, the two or more connecting parts are not necessarily parts that are joined to other members, and therefore must themselves have high rigidity. Therefore, by making the thickness of each of the two or more connecting parts thicker than the thickness of each of the first and second joints, as in the above configuration, the strength of the fixing member can be efficiently improved. [Effects of the Invention]

[0028] According to the present invention, in a seat mounting structure having a fixing member that fixes a seat or a rail member attached to the seat to a vehicle floor or a rail member attached to the vehicle floor, the rigidity and strength of the fixing member can be effectively increased. [Brief explanation of the drawings]

[0029] [Figure 1] 1 is a perspective view of a vehicle seat having a seat mounting structure according to a first embodiment. [Figure 2] FIG. 2 is a perspective view of the seat mounting structure of FIG. 1; [Figure 3] FIG. 2 is a partial front view. [Figure 4] FIG. 2 is a perspective view of the fixing member of FIG. 1; [Figure 5] FIG. 5 is a view similar to FIG. 4, showing a modified example of the fixing member in the first embodiment. [Figure 6] FIG. 5 is a view similar to FIG. 4, showing a modified example of the fixing member in the first embodiment. [Figure 7] FIG. 10 is a perspective view of a seat mounting structure according to a second embodiment. [Figure 8] Partial side view of Figure 7. [Figure 9] 10 is a view similar to FIG. 8, showing a modified example of the fixing member in the second embodiment. [Figure 10] FIG. 10 is a perspective view of a seat mounting structure according to a third embodiment. [Figure 11] FIG. 11 is a partial side view of FIG. [Figure 12] FIG. 10 is a perspective view of a vehicle seat having a seat mounting structure according to a fourth embodiment. [Figure 13] FIG. 13 is a perspective view of the seat mounting structure of FIG. [Figure 14] FIG. 14 is a view similar to FIG. 13 showing a modified example of the seat mounting structure according to the fourth embodiment. [Figure 15] FIG. 10 is a perspective view of a seat mounting structure according to a fifth embodiment. [Figure 16] FIG. 16 is a view similar to FIG. 15 showing a modified example of the seat mounting structure according to the fifth embodiment. [Figure 17] FIG. 10 is a perspective view of a seat mounting structure according to a sixth embodiment. [Figure 18] 17 is a partial side view of FIG. [Figure 19] FIG. 18 is a view similar to FIG. 17 showing a modified example of the seat mounting structure according to the sixth embodiment. [Figure 20] FIG. 13 is a perspective view of a vehicle seat having a seat mounting structure according to a seventh embodiment. [Figure 21] FIG. 13 is a perspective view of a seat mounting structure according to a seventh embodiment. [Figure 22] FIG. 21 is a view similar to FIG. 20 showing a modified example of the seat mounting structure according to the seventh embodiment. [Figure 23] FIG. 13 is a front view showing a modified example of the seat mounting structure according to the seventh embodiment. [Figure 24] Partial side view of Figure 23. [Figure 25] FIG. 13 is a front view showing a modified example of the seat mounting structure according to the seventh embodiment. [Figure 26]Partial side view of Figure 25. [Figure 27] FIG. 13 is a side view showing a modified example of the seat mounting structure according to the seventh embodiment. [Figure 28] Partial front view of Figure 27. [Figure 29] FIG. 13 is a side view showing a modified example of the seat mounting structure according to the seventh embodiment. [Figure 30] Partial front view of Figure 29. DETAILED DESCRIPTION OF THE INVENTION

[0030] (First embodiment) Fig. 1 is a perspective view of a vehicle seat 1 according to this embodiment. The vehicle seat 1 has a seat portion 3 where a passenger sits. In Fig. 1, the seat portion 3 is simply illustrated by a two-dot chain line. The vehicle seat 1 is provided with a seat mounting structure 2.

[0031] In this embodiment, the seat mounting structure 2 includes a first rail member 20, a second rail member 21, and a fixing member 40. The first rail member 20 is attached to the seat portion 3. The second rail member 21 guides the first rail member 20 so that it can move in the fore-and-aft direction of the vehicle relative to a vehicle floor 4 described below. The fixing member 40 fixes the second rail member 21 to the vehicle floor 4. In this embodiment, the fore-and-aft direction of the vehicle is defined as the first direction.

[0032] The first rail member 20 and the second rail member 21 are provided as a pair on the left and right sides when viewed from the front-to-rear direction of the vehicle. Furthermore, a pair of fixing members 40 are provided on the front and rear sides of each of the pair of left and right second rail members 21. Therefore, the seat mounting structure 2 has four fixing members 40, consisting of a left front first fixing member 40A, a left rear second fixing member 40B, a right front third fixing member 40C, and a right rear fourth fixing member 40D.

[0033] The fixing member 40 is an aluminum alloy extrusion selected from the 5000 series, 6000 series, or 7000 series. By forming the fixing member 40 from an aluminum alloy extrusion, it is possible to improve rigidity while suppressing an increase in weight compared to when the fixing member 40 is formed from steel, and it is also possible to easily form a closed cross-sectional shape, which will be described later, integrally.

[0034] The vehicle body floor 4 has a floor panel 5 that forms the floor surface inside the vehicle cabin, and a floor cross member 6 that is joined to the upper surface 5a of the floor panel 5. In this embodiment, the floor cross member 6 extends in the left-right direction of the vehicle. In this embodiment, a pair of floor cross members 6 are provided in the front and rear, respectively, directly below the front and rear portions of the second rail member 21.

[0035] The floor cross member 6 has a floor cross member upper surface 6a and a floor cross member side surface 6b. The floor cross member upper surface 6a is provided on the upper side of the floor cross member 6 in the vehicle vertical direction and extends along the vehicle front-rear and left-right directions. In this embodiment, the floor cross member side surface 6b extends along the vehicle left-right and up-down directions from the vehicle front-rear direction end of the floor cross member upper surface 6a. In this embodiment, the floor cross member upper surface 6a is the mounting surface to which the fixing member 40 is attached.

[0036] FIG. 2 is a perspective view showing the periphery of the first rail member 20 and second rail member 21 on the left side of the seat mounting structure 2. FIG. 3 is a front view of the front part of the seat mounting structure 2 in FIG. 2, seen from the longitudinal direction of the vehicle. In FIGS. 2 and 3, the first rail member 20 and the second rail member 21 are shown in perspective by two-dot chain lines. FIG. 4 is a perspective view showing one of the four fixing members 40. Hereinafter, the first fixing member 40A (simply referred to as fixing member 40) of the four fixing members 40 will be described with reference to FIGS. 2 to 4.

[0037] As shown in FIGS. 2 to 4, the fixing member 40 includes a first joint 40a, a second joint 40b, and connecting portions 40c and 40d. The first joint 40a extends in the vehicle longitudinal direction and the vehicle transverse direction and is configured as a plate. The second joint 40b extends in the vehicle longitudinal direction and the vehicle transverse direction and is configured as a plate. In this embodiment, the first joint 40a and the second joint 40b are arranged parallel to each other, and the first joint 40a is arranged above the second joint 40b in the vehicle vertical direction. The connecting portions 40c and 40d extend in the vehicle vertical direction and the vehicle longitudinal direction and are configured as a plate. The connecting portions 40c and 40d connect both ends of the first joint 40a and the second joint 40b in the vehicle transverse direction. In this embodiment, the connecting portions 40c and 40d are arranged parallel to each other. That is, the fixing member 40 has a rectangular closed cross-section in a cross section along the vehicle vertical direction, specifically, a cross section perpendicular to the vehicle longitudinal direction. Furthermore, when viewed from the vehicle transverse direction, the connecting portions 40c and 40d are configured as parallelograms. Therefore, the first joint portion 40a and the second joint portion 40b are positioned offset from each other in the vehicle longitudinal direction.

[0038] The fixing member 40 may be disposed in a state rotated by 90 degrees with respect to the vehicle vertical direction. In other words, the fixing member 40 may have a rectangular closed cross-sectional shape in a cross section perpendicular to the vehicle left-right direction.

[0039] In this embodiment, the first fixing member 40A and the third fixing member 40C (see FIG. 1) are arranged so that the first joint 40a is located rearward of the second joint 40b, and the second fixing member 40B and the fourth fixing member 40D (see FIG. 1) are arranged so that the first joint 40a is located forward of the second joint 40b.

[0040] The first joint portion 40a is joined to a lower surface 21a provided on the lower side in the vehicle vertical direction of the second rail member 21. The second joint portion 40b is joined to the floor cross member upper surface 6a.

[0041] Referring to FIG. 3 , in this embodiment, the thickness t2 of each of the connecting portions 40c and 40d is greater than the thickness t1 of each of the first and second joining portions 40a and 40b. This effectively improves the strength of the fixing member 40. As described above, the first and second joining portions 40a and 40b are joined to other members, and therefore exhibit high rigidity when integrated with the other members. However, the connecting portions 40c and 40d are not necessarily joined to other members, and therefore must ensure high rigidity by themselves. Therefore, by making the thickness t2 of each of the connecting portions 40c and 40d greater than the thickness t1 of each of the first and second joining portions 40a and 40b, as in the above configuration, the strength of the fixing member 40 can be effectively improved. The first and second joining portions 40a and 40b, and the connecting portions 40c and 40d may each have the same thickness t1.

[0042] 4, a through hole 40e that penetrates the first joint portion 40a in the direction perpendicular to the surface is formed in the fixing member 40. The fixing member 40 is fixed to the lower surface 21a of the second rail member 21 by a rivet 41 via the through hole 40e.

[0043] The fixing member 40 also has a fastening hole 40f formed therein, which penetrates the second joint portion 40b in the direction perpendicular to the surface. The fixing member 40 is fastened to the floor cross member 6 by fastening bolts 42 through the fastening hole 40f. As described above, the first joint portion 40a and the second joint portion 40b are positioned offset in the fore-and-aft direction of the vehicle, so that the fastening hole 40f is visible when the fixing member 40 is viewed from above the vehicle. This makes the fastening work easy. When the fixing member 40 is fixed to the floor cross member 6, the floor cross member 6 is spaced downward from the second rail member 21.

[0044] According to this embodiment, the second rail member 21 is immovably fixed to the floor cross member 6 via the fixing member 40. The fixing member 40 is configured by connecting the first joint portion 40a and the second joint portion 40b with the connecting portions 40c and 40d. Therefore, stress concentration can be suppressed compared to when the first joint portion 40a and the second joint portion 40b are connected, for example, only by the connecting portion 40c. Therefore, the rigidity and strength of the fixing member 40 can be effectively increased.

[0045] Furthermore, the second rail member 21 can be attached to the vehicle floor 4 via the fixing member 40. Therefore, the second rail member 21 and the vehicle floor 4 are firmly joined by the fixing member 40, which can improve the stability of the seat portion 3.

[0046] Furthermore, the fixing member 40 can support horizontal loads with its strong closed cross-sectional shape. This can suppress horizontal deformation of the fixing member 40. In other words, the rigidity and strength of the fixing member 40 against horizontal loads can be improved.

[0047] In this embodiment, the fixing member 40 has a closed cross-sectional shape in a cross section perpendicular to the vehicle longitudinal direction. Therefore, the fixing member 40 can support a load in the vehicle longitudinal direction with a strong closed cross-sectional shape. Therefore, deformation of the fixing member 40 in the vehicle longitudinal direction can be suppressed. In other words, the rigidity and strength of the fixing member 40 against a load in the vehicle longitudinal direction can be improved. By improving the rigidity and strength of the fixing member 40 against a load in the vehicle longitudinal direction, the stability of the seat portion 3 can be improved.

[0048] In this embodiment, the closed cross-sectional shape is rectangular, which allows a large internal space to be secured within the fixing member 40, making it easier to attach the fixing member 40.

[0049] 5, in a modified example of the fixing member 40 of this embodiment, the fixing member 40 has reinforcing portions 40g to 40k. The reinforcing portion 40g is disposed parallel to the first joint portion 40a and the second joint portion 40b, connects the connecting portions 40c and 40d, and extends in the longitudinal and lateral directions of the vehicle. In other words, the reinforcing portion 40g divides the internal space of the fixing member 40 in the vertical direction of the vehicle.

[0050] Reinforcement portions 40h, 40i extend in a plate-like shape from both ends of reinforcement portion 40g in the vehicle's left-right direction toward first joint portion 40a. Therefore, first joint portion 40a, connecting portion 40c, and reinforcement portion 40h form a triangular closed cross-sectional shape when viewed from the vehicle's front-rear direction. Similarly, first joint portion 40a, connecting portion 40d, and reinforcement portion 40i form a triangular closed cross-sectional shape when viewed from the vehicle's front-rear direction.

[0051] Reinforcement portions 40j, 40k extend in a plate-like shape from below reinforcement portion 40g of connecting portions 40c, 40d in the vehicle vertical direction toward second joint portion 40b. Therefore, second joint portion 40b, connecting portion 40c, and reinforcement portion 40j form a triangular closed cross-sectional shape when viewed from the vehicle longitudinal direction. Similarly, second joint portion 40b, connecting portion 40d, and reinforcement portion 40k form a triangular closed cross-sectional shape when viewed from the vehicle longitudinal direction.

[0052] In the modified example of the fixing member 40, the fixing member 40 is reinforced by reinforcing portions 40g to 40k, and the rigidity and strength of the fixing member 40 in the left-right direction of the vehicle can also be improved.

[0053] 6, in another modification of the fixing member 40 of this embodiment, the first joint portion 40a includes two first joint pieces 40l, 40m spaced apart in the left-right direction of the vehicle. A through hole 40e is formed in each of the first joint pieces 40l, 40m. Although not shown, the fixing member 40 is fastened to the underside 21a (see FIG. 3) of the second rail member 21 by rivets 41 (see FIG. 3) through the through holes 40e.

[0054] In this modified example, the fixed member 40 does not form a closed cross-sectional shape by itself, but by attaching the fixed member 40 to the lower surface 21a (see FIG. 3) of the second rail member 21, the fixed member 40 and the second rail member 21 (see FIG. 3) form a closed cross-sectional shape when viewed in the vehicle longitudinal direction. Therefore, the fixed member 40 can support the load in the vehicle longitudinal direction with a strong closed cross-sectional shape.

[0055] The configurations of the seat mounting structure 2 according to the second to seventh embodiments described below differ from the first embodiment in the following respects. The other configurations of these embodiments are the same as those of the first embodiment, and elements that are the same or similar to those of the first embodiment are denoted by the same reference numerals.

[0056] (Second embodiment) 7 and 8, the first rail member 20 and the second rail member 21 are shown in transparent form by two-dot chain lines.

[0057] 7, the second embodiment differs from the first embodiment in the configurations of first fixing member 40A and third fixing member 40C. Because the configuration of third fixing member 40C is similar to that of first fixing member 40A, only first fixing member 40A will be described below.

[0058] 8, the second joint portion 40b of the first fixing member 40A extends in the left-right direction of the vehicle and in the up-down direction of the vehicle, and is attached to a floor cross member side surface 6b located on the front side in the vehicle fore-and-aft direction of the floor cross member 6. That is, in the second embodiment, the floor cross member side surface 6b is the mounting surface to which the first fixing member 40A is attached.

[0059] The connecting portions 40c, 40d of the first fixing member 40A are connected from both ends of the first joint portion 40a in the vehicle longitudinal direction to the upper end of the second joint portion 40b in the vehicle vertical direction. Therefore, in the second embodiment, the first fixing member 40A has a triangular closed cross-sectional shape when viewed from the vehicle left-right direction.

[0060] In the second embodiment, the first fixing member 40A may have a triangular closed cross-sectional shape when viewed from the left-right direction of the vehicle, i.e., a truss structure. Therefore, in addition to the rigidity and strength in the left-right direction of the vehicle, the rigidity and strength in the front-rear direction of the vehicle may be improved. In other words, the rigidity and strength of the first fixing member 40A may be improved.

[0061] In the second embodiment, the first joint 40a and the second joint 40b are arranged at the same position in the left-right direction of the vehicle, but they may be arranged at different positions. That is, the connection portions 40c and 40d may be inclined in the left-right direction of the vehicle. In this case, the shape of the first fixing member 40A can be determined according to the position of the floor cross member 6. In other words, the first fixing member 40A can be provided regardless of the positional relationship between the second rail member 21 and the floor cross member 6.

[0062] Referring to FIG. 9 , in a modified example of the first fixing member 40A in the second embodiment, the first fixing member 40A has a support portion 45 that supports the first joint portion 40a from below in the vehicle up-down direction. The support portion 45 includes a lower support portion 45b and an upper support portion 45a. The lower support portion 45b is plate-shaped, contacts the floor cross member upper surface 6a, and extends along the vehicle left-right direction and the vehicle front-rear direction. The upper support portion 45a is plate-shaped, connects the rear ends of the first joint portion 40a and the lower support portion 45b in the vehicle front-rear direction, and extends along the vehicle left-right direction and the vehicle up-down direction.

[0063] In this modified example, the support portion 45 can prevent the first joint portion 40a from deforming downward in the vehicle up-down direction. That is, the strength of the fixing member 40 can be improved.

[0064] (Third embodiment) 10 and 11, the first rail member 20 and the second rail member 21 are shown in transparent form by two-dot chain lines.

[0065] 10, in the third embodiment, the vehicle body floor 4 has a floor tunnel 7. The floor tunnel 7 protrudes upward in the vehicle vertical direction, forming a convex shape, and is disposed approximately in the center of the vehicle in the left-right direction of the vehicle body (not shown). In the third embodiment, the floor tunnel 7 is formed integrally with the floor panel 5, and includes a tunnel upper surface 7a extending along the vehicle longitudinal direction and the vehicle left-right direction, and tunnel side surfaces 7b connecting both ends of the tunnel upper surface 7a in the vehicle left-right direction to the floor panel 5.

[0066] In the third embodiment, the configurations of the first fixing member 40A and the second fixing member 40B are different from those of the first embodiment. The configuration of the second fixing member 40B is similar to that of the first fixing member 40A, and therefore, the following description of the second fixing member 40B may be omitted.

[0067] 11, the second joint portion 40b of the first fixing member 40A extends in the vehicle longitudinal direction and the vehicle vertical direction, and is attached to a tunnel side surface 7b located on the right side in the vehicle left-right direction of the floor tunnel 7. That is, in the third embodiment, the tunnel side surface 7b is the attachment surface to which the first fixing member 40A is attached.

[0068] The connecting portions 40c, 40d of the first fixing member 40A are connected from both ends of the first joint portion 40a in the left-right direction of the vehicle to the upper end of the second joint portion 40b in the up-down direction of the vehicle. Therefore, in the third embodiment, the first fixing member 40A has a triangular cross-sectional shape when viewed from the front-rear direction of the vehicle.

[0069] In the third embodiment, the first fixing member 40A may have a triangular closed cross-sectional shape when viewed from the vehicle longitudinal direction, i.e., a truss structure. Therefore, in addition to the rigidity and strength in the vehicle longitudinal direction, the rigidity and strength in the vehicle lateral direction may be improved. In other words, the rigidity and strength of the first fixing member 40A may be improved.

[0070] In the third embodiment, the first fixing member 40A and the second fixing member 40B are inclined in the vehicle longitudinal direction. Specifically, in the first fixing member 40A, the second joint 40b is located forward of the first joint 40a in the vehicle longitudinal direction. In the second fixing member 40B, the second joint 40b is located rearward of the first joint 40a in the vehicle longitudinal direction.

[0071] By having the first fixing member 40A and the second fixing member 40B inclined in the vehicle front-rear direction, the fastening operation of the first fixing member 40A and the second fixing member 40B to the floor tunnel 7 can be facilitated.

[0072] (Fourth embodiment) In Fig. 12, the seat portion 3 is simply shown by a two-dot chain line, and in Fig. 13, the first rail member 20 and the second rail member 21 are shown in transparent form by a two-dot chain line.

[0073] 12 and 13, the seat mounting structure 2 in the fourth embodiment includes horizontal frames 50 instead of the first rail member 20 (see FIG. 1) and the second rail member 21 (see FIG. 1). The horizontal frames 50 extend in the left-right direction of the vehicle relative to the seat portion 3 and are attached to the seat portion 3 so as to form a pair of left and right frames when viewed from the left-right direction of the vehicle. In the fourth embodiment, the horizontal frames 50 are hollow extruded members with a substantially rectangular cross section and have a horizontal frame upper surface 50a that is the surface located on the upper side in the vehicle vertical direction and a horizontal frame lower surface 50b that is the surface located on the lower side in the vehicle vertical direction.

[0074] The seat 3 is fixed to the upper surface 50a of the horizontal frame. The first joint 40a of the fixing member 40 is joined to the lower surface 50b of the horizontal frame. In other words, the fixing member 40 is attached to the horizontal frame 50 and the vehicle floor 4, and fixes the seat 3 to the vehicle floor 4.

[0075] In the fourth embodiment, the first fixing member 40A and the third fixing member 40C are attached to the front horizontal frame 50. The second fixing member 40B and the fourth fixing member 40D are attached to the rear horizontal frame 50.

[0076] In the fourth embodiment, the seat 3 is fixed to the vehicle floor 4 via the horizontal frame 50, so that the stability of the seat 3 can be improved.

[0077] 14, in a modified example of the seat mounting structure 2 in the fourth embodiment, the seat mounting structure 2 includes a first rail member 20 and a second rail member 21 instead of the lateral frame 50 (see FIG. 13). The second rail member 21 is disposed to extend along the left-right direction of the vehicle and guides the first rail member 20 so that it can move in the left-right direction of the vehicle. In this modified example, the left-right direction of the vehicle is defined as the first direction.

[0078] The first joint portion 40a is joined to a lower surface 21a provided on the lower side in the vehicle vertical direction of the second rail member 21. The second joint portion 40b is joined to the floor cross member upper surface 6a.

[0079] In this modification, the seat portion 3 (see FIG. 12) can move in the left-right direction of the vehicle via the first rail member 20 and the second rail member 21.

[0080] (Fifth embodiment) 15, in the fifth embodiment, the first rail member 20 and the second rail member 21 extend in the left-right direction of the vehicle relative to the seat portion 3 (see FIG. 1) and are attached to form a pair on the left and right when viewed in the left-right direction of the vehicle. In this modification, the left-right direction of the vehicle is defined as the first direction.

[0081] In the fifth embodiment, the configurations of the first fixing member 40A and the third fixing member 40C are different from those of the first embodiment. Since the configuration of the third fixing member 40C is similar to that of the first fixing member 40A, only the first fixing member 40A will be described below.

[0082] The second joint portion 40b of the first fixing member 40A extends in the left-right direction and the up-down direction of the vehicle, and is attached to a floor cross member side surface 6b located on the front side in the vehicle fore-and-aft direction of the floor cross member 6. That is, in the fifth embodiment, the floor cross member side surface 6b is the mounting surface to which the first fixing member 40A is attached.

[0083] The connecting portions 40c, 40d of the first fixing member 40A are connected from both ends of the first joint portion 40a in the vehicle longitudinal direction to the upper end of the second joint portion 40b in the vehicle vertical direction. Therefore, in the second embodiment, the first fixing member 40A has a triangular closed cross-sectional shape when viewed from the vehicle left-right direction.

[0084] In the fifth embodiment, the first fixing member 40A may have a triangular closed cross-sectional shape when viewed from the left-right direction of the vehicle, i.e., a truss structure. Therefore, in addition to the rigidity and strength in the left-right direction of the vehicle, the rigidity and strength in the front-rear direction of the vehicle may be improved. In other words, the rigidity and strength of the first fixing member 40A may be improved.

[0085] 16, the seat mounting structure 2 in the modified fifth embodiment includes horizontal frames 50 instead of the first rail member 20 (see FIG. 15) and the second rail member 21 (see FIG. 15). The horizontal frames 50 extend in the left-right direction of the vehicle relative to the seat portion 3 (see FIG. 1) and are attached to the seat portion 3 (see FIG. 1) so as to form a pair of left and right frames when viewed from the left-right direction of the vehicle. In the modified fifth embodiment, the horizontal frames 50 are hollow extruded members having a substantially rectangular cross section and including a horizontal frame upper surface 50a that is the surface located on the upper side in the vehicle vertical direction and a horizontal frame lower surface 50b that is the surface located on the lower side in the vehicle vertical direction.

[0086] The seat portion 3 (see FIG. 1) is fixed to the upper surface 50a of the horizontal frame. The first joint portion 40a of the fixing member 40 is joined to the lower surface 50b of the horizontal frame. In other words, the fixing member 40 is attached to the horizontal frame 50 and the vehicle floor 4, and fixes the seat portion 3 to the vehicle floor 4.

[0087] In the modified example of the fifth embodiment, the first fixing member 40A and the third fixing member 40C are attached to the front horizontal frame 50. The second fixing member 40B and the fourth fixing member 40D are attached to the rear horizontal frame 50.

[0088] In the modified example of the fifth embodiment, the seat 3 is fixed to the vehicle floor 4 via the horizontal frame 50, so that the stability of the seat 3 can be improved.

[0089] (Sixth embodiment) 17, in the sixth embodiment, the vehicle body floor 4 has a floor tunnel 7. The floor tunnel 7 protrudes upward in the vehicle vertical direction to form a convex shape, and is disposed approximately in the center of the vehicle in the left-right direction of the vehicle body (not shown). In the sixth embodiment, the floor tunnel 7 is formed integrally with the floor panel 5, and includes a tunnel upper surface 7a extending along the vehicle longitudinal direction and the vehicle left-right direction, and tunnel side surfaces 7b connecting both ends of the tunnel upper surface 7a in the vehicle left-right direction to the floor panel 5.

[0090] In the sixth embodiment, the second rail member 21 is disposed to extend along the left-right direction of the vehicle and guides the first rail member 20 to be movable in the left-right direction of the vehicle. In the sixth embodiment, the left-right direction of the vehicle is defined as the first direction.

[0091] In the sixth embodiment, the configurations of the first fixing member 40A and the second fixing member 40B are different from those of the first embodiment. Since the configuration of the second fixing member 40B is similar to that of the first fixing member 40A, the following description of the second fixing member 40B may be omitted.

[0092] The second joint portion 40b of the first fixing member 40A extends in the vehicle longitudinal direction and the vehicle vertical direction, and is attached to a tunnel side surface 7b located on the right side in the vehicle left-right direction of the floor tunnel 7. That is, in the sixth embodiment, the tunnel side surface 7b is the mounting surface to which the first fixing member 40A is attached.

[0093] The connecting portions 40c, 40d of the first fixing member 40A are connected from both ends of the first joint portion 40a in the left-right direction of the vehicle to the upper end of the second joint portion 40b in the up-down direction of the vehicle. Therefore, in the sixth embodiment, the first fixing member 40A has a triangular cross-sectional shape when viewed from the front-rear direction of the vehicle.

[0094] In the sixth embodiment, the first fixing member 40A may have a triangular closed cross-sectional shape when viewed from the vehicle longitudinal direction, i.e., a truss structure. Therefore, in addition to the rigidity and strength in the vehicle longitudinal direction, the rigidity and strength in the vehicle lateral direction may be improved. In other words, the rigidity and strength of the first fixing member 40A may be improved.

[0095] 18, in the sixth embodiment, the first fixing member 40A and the second fixing member 40B are inclined in the vehicle longitudinal direction. Specifically, in the first fixing member 40A, the second joint 40b is located forward of the first joint 40a in the vehicle longitudinal direction. In addition, in the second fixing member 40B, the second joint 40b is located rearward of the first joint 40a in the vehicle longitudinal direction.

[0096] By having the first fixing member 40A and the second fixing member 40B inclined in the vehicle front-rear direction, the fastening operation of the first fixing member 40A and the second fixing member 40B to the floor tunnel 7 can be facilitated.

[0097] 19, the seat mounting structure 2 in the modified sixth embodiment includes horizontal frames 50 instead of the first rail member 20 (see FIG. 17) and the second rail member 21 (see FIG. 17). The horizontal frames 50 extend in the left-right direction of the vehicle relative to the seat portion 3 (see FIG. 1) and are attached to the seat portion 3 (see FIG. 1) so as to form a pair of left and right frames when viewed from the left-right direction of the vehicle. In the modified sixth embodiment, the horizontal frames 50 are hollow extruded members having a substantially rectangular cross section and including a horizontal frame upper surface 50a that is the surface located on the upper side in the vehicle vertical direction and a horizontal frame lower surface 50b that is the surface located on the lower side in the vehicle vertical direction.

[0098] The seat portion 3 (see FIG. 1) is fixed to the upper surface 50a of the horizontal frame. The first joint portion 40a of the fixing member 40 is joined to the lower surface 50b of the horizontal frame. In other words, the fixing member 40 is attached to the horizontal frame 50 and the vehicle floor 4, and fixes the seat portion 3 to the vehicle floor 4.

[0099] In the modified sixth embodiment, the first fixing member 40A and the third fixing member 40C are attached to the front horizontal frame 50. The second fixing member 40B and the fourth fixing member 40D are attached to the rear horizontal frame 50.

[0100] In the modified example of the sixth embodiment, the seat 3 is fixed to the vehicle floor 4 via the horizontal frame 50, so that the stability of the seat 3 can be improved.

[0101] (Seventh embodiment) In Figure 20, the seat portion 3 is simply shown by a two-dot chain line. In Figure 21, the first rail member 20 and the second rail member 21 are shown in transparent form by a two-dot chain line.

[0102] 20 and 21, in the seventh embodiment, the seat mounting structure 2 comprises a first rail member 20, a second rail member 21, a third rail member 30, and a fourth rail member 31.

[0103] The first rail member 20 and the second rail member 21 are provided as a pair on the left and right as viewed in the left-right direction of the vehicle. The third rail member 30 and the fourth rail member 31 are provided as a pair on the left and right as viewed in the front-rear direction of the vehicle below the second rail member 21 in the up-down direction of the vehicle.

[0104] In the seventh embodiment, the third rail member 30 has a protrusion 32 that protrudes higher than the fourth rail member 31 in the vehicle vertical direction. The protrusion 32 has a protrusion upper surface 32a, which is a surface extending along the vehicle front-rear direction and the vehicle left-right direction, on its upper side in the vehicle vertical direction. The protrusion 32 also has a protrusion front surface 32b, a protrusion right surface 32c, a protrusion left surface 32d, and a protrusion rear surface 32e. The protrusion front surface 32b is a surface extending along the vehicle left-right direction and the vehicle up-down direction on the front side in the vehicle front-rear direction. The protrusion right surface 32c is a surface extending along the vehicle front-rear direction and the vehicle up-down direction on the right side in the vehicle left-right direction. The protrusion left surface 32d is a surface extending along the vehicle front-rear direction and the vehicle up-down direction on the left side in the vehicle left-right direction. The protrusion rear surface 32e is a surface extending along the vehicle left-right direction and the vehicle up-down direction on the rear side in the vehicle front-rear direction.

[0105] In the seventh embodiment, the second rail member 21 is disposed to extend along the vehicle left-right direction and guides the first rail member 20 to be movable in the vehicle left-right direction. The fourth rail member 31 is disposed to extend along the vehicle front-rear direction and guides the third rail member 30 to be movable in the vehicle front-rear direction. In other words, the fourth rail member 31 guides the third rail member 30 to be movable in the vehicle front-rear direction, which is perpendicular to the vehicle left-right direction. In the seventh embodiment, the vehicle left-right direction is defined as the first direction, and the vehicle front-rear direction is defined as the second direction.

[0106] In the seventh embodiment, the fourth rail member 31 is disposed so as to be embedded in the floor panel 5.

[0107] The first joint portion 40a of the fixing member 40 is fixed to the lower surface 21a of the second rail member 21 by a rivet 41 via a through hole 40e (see FIG. 4). The second joint portion 40b of the fixing member 40 is joined to the protruding portion upper surface 32a of the third rail member 30 by a fastening bolt 42 via a fastening hole 40f (see FIG. 4). That is, in the seventh embodiment, the protruding portion upper surface 32a is the mounting surface to which the fixing member 40 is attached.

[0108] According to the seventh embodiment, the second rail member 21 can be attached to the third rail member 30 via the fixing member 40. This allows the seat 3 to slide in the front-rear and left-right directions of the vehicle. Furthermore, the second rail member 21 and the third rail member 30 are firmly joined by the fixing member 40, which can improve the stability of the seat 3.

[0109] Referring to Figure 22, in a modified example of the seat mounting structure 2 in the seventh embodiment, the seat mounting structure 2 includes horizontal frames 50 instead of the first rail member 20 (see Figure 20) and the second rail member 21 (see Figure 20). The horizontal frames 50 extend in the left-right direction of the vehicle relative to the seat 3 and are attached to the seat 3 so as to form a pair on the left and right when viewed from the left-right direction of the vehicle. In this modified example, the horizontal frames 50 are hollow extruded members with a substantially rectangular cross section and have a horizontal frame upper surface 50a that is the surface located on the upper side in the vehicle vertical direction and a horizontal frame lower surface 50b that is the surface located on the lower side in the vehicle vertical direction.

[0110] The seat portion 3 is fixed to the horizontal frame upper surface 50a. The first joint portion 40a of the fixing member 40 (see FIG. 21) is joined to the horizontal frame lower surface 50b.

[0111] In this modified example, the first fixing member 40A and the third fixing member 40C are attached to the front horizontal frame 50. The second fixing member 40B and the fourth fixing member 40D are attached to the rear horizontal frame 50.

[0112] In this modification, the seat portion 3 is fixed to the fixing member 40 via the horizontal frame 50, and therefore the stability of the seat portion 3 can be improved.

[0113] 23 and 24, in another modification of the seat mounting structure 2 in the seventh embodiment, the shapes of the first fixing member 40A and the third fixing member 40C are different. Because the configuration of the third fixing member 40C is similar to that of the first fixing member 40A, only the first fixing member 40A will be described below.

[0114] The second joint portion 40b of the first fixing member 40A extends in the left-right direction and the up-down direction of the vehicle, and is attached to the protrusion front surface 32b of the protrusion 32. That is, in this modification, the protrusion front surface 32b is the attachment surface to which the first fixing member 40A is attached.

[0115] The connecting portions 40c, 40d of the first fixing member 40A are connected from both ends of the first joint portion 40a in the vehicle longitudinal direction to the upper end of the second joint portion 40b in the vehicle vertical direction. Therefore, in this modification, the first fixing member 40A has a triangular cross-sectional shape when viewed from the vehicle left-right direction.

[0116] As shown in Figures 25 and 26, the seat mounting structure 2 in this modified example may include a horizontal frame 50 attached to the seat portion 3 instead of the first rail member 20 (see Figure 23) and the second rail member 21 (see Figure 23).

[0117] In this case, the horizontal frame 50 is a hollow extruded profile with an approximately rectangular cross-sectional shape, and has a horizontal frame upper surface 50a, which is the surface located on the upper side in the vertical direction of the vehicle, and a horizontal frame lower surface 50b, which is the surface located on the lower side in the vertical direction of the vehicle.

[0118] The seat portion 3 (see FIG. 20) is fixed to the horizontal frame upper surface 50a. The first joint portion 40a of the fixing member 40 is joined to the horizontal frame lower surface 50b.

[0119] In this modification, the first fixing member 40A may have a triangular closed cross-sectional shape when viewed from the left-right direction of the vehicle, i.e., a truss structure. Therefore, in addition to the rigidity and strength in the left-right direction of the vehicle, the rigidity and strength in the front-rear direction of the vehicle may be improved. In other words, the rigidity and strength of the first fixing member 40A may be improved.

[0120] 27 and 28, in another modification of the seat mounting structure 2 in the seventh embodiment, the shapes of the first fixing member 40A and the second fixing member 40B are different. The configuration of the second fixing member 40B is similar to that of the first fixing member 40A, and therefore, the following description of the second fixing member 40B may be omitted.

[0121] The second joint portion 40b of the first fixing member 40A extends in the vehicle longitudinal direction and the vehicle vertical direction, and is attached to the protruding portion right surface 32c of the protruding portion 32. That is, in this modified example, the protruding portion right surface 32c is the attachment surface to which the first fixing member 40A is attached.

[0122] The connecting portions 40c, 40d of the first fixing member 40A are connected from both ends of the first joint portion 40a in the left-right direction of the vehicle to the upper end of the second joint portion 40b in the up-down direction of the vehicle. Therefore, in this modification, the first fixing member 40A has a triangular cross-sectional shape when viewed from the front-rear direction of the vehicle.

[0123] The first fixing member 40A and the second fixing member 40B are inclined in the vehicle longitudinal direction. Specifically, in the first fixing member 40A, the second joint 40b is located forward of the first joint 40a in the vehicle longitudinal direction. In the second fixing member 40B, the second joint 40b is located rearward of the first joint 40a in the vehicle longitudinal direction. This can facilitate the fastening operation of the first fixing member 40A and the second fixing member 40B to the protruding portion right surface 32c.

[0124] As shown in Figures 29 and 30, the seat mounting structure 2 in this modified example may include a horizontal frame 50 attached to the seat portion 3 instead of the first rail member 20 (see Figure 27) and the second rail member 21 (see Figure 27).

[0125] In this case, the horizontal frame 50 is a hollow extruded profile with an approximately rectangular cross-sectional shape, and has a horizontal frame upper surface 50a, which is the surface located on the upper side in the vertical direction of the vehicle, and a horizontal frame lower surface 50b, which is the surface located on the lower side in the vertical direction of the vehicle.

[0126] The seat portion 3 (see FIG. 20) is fixed to the horizontal frame upper surface 50a. The first joint portion 40a of the fixing member 40 is joined to the horizontal frame lower surface 50b.

[0127] In this modification, the first fixing member 40A may have a triangular closed cross-sectional shape when viewed from the vehicle longitudinal direction, i.e., a truss structure. Therefore, in addition to the rigidity and strength in the vehicle longitudinal direction, the rigidity and strength in the vehicle lateral direction may be improved. In other words, the rigidity and strength of the first fixing member 40A may be improved.

[0128] While specific embodiments and their modifications of the present invention have been described above, the present invention is not limited to the above embodiments and can be implemented with various modifications within the scope of the present invention. For example, an appropriate combination of the contents of each embodiment may be considered as one embodiment of the present invention. Furthermore, three or more connecting portions (two connecting portions 40c, 40d in each of the above embodiments) connecting the first connecting portion 40a and the second connecting portion 40b may be provided. [Explanation of symbols]

[0129] 1. Vehicle seat 2 Seat mounting structure 3 Seat area 4. Car floor 5 Floor Panel 5a Top side 6 Floor cross member 6a Floor cross member top surface (mounting surface) 6b Floor cross member side (mounting surface) 7 Floor Tunnel 7a Tunnel top 7b Tunnel side (mounting surface) 10 Second seat 20 First rail member 20a top surface 21 Second rail member 21a Bottom side 30 Third rail member 30a Top surface (mounting surface) 31 Fourth rail member 32 Protrusion 32a Top surface of protrusion 32b Front of protrusion 32c Right side of protrusion 32d Projection left side 32e Rear side of protrusion 40 Fixing member 40a 1st joint 40b 2nd joint 40c, 40d connection 40e through hole 40f Fastening hole 40g,40h,40i,40j,40k Reinforcement part 40l,40m 1st joint piece 41 Rivet 42 Fastening bolt 45 Support part 45a Support upper part 45b Lower support 50 horizontal frame 50a Horizontal frame top 50b Underside of horizontal frame

Claims

1. a first rail member attached to the seat portion; a second rail member that guides the first rail member movably in a first direction relative to a vehicle body floor; a fixing member for fixing the second rail member to a mounting surface; Equipped with The fixing member is a first joint portion joined to the second rail member; a second joining portion joined to the mounting surface; two or more connection portions connecting the first joint portion and the second joint portion; Equipped with the fixing member is an aluminum alloy extrusion, The two or more connection portions, the first joint portion, and the second joint portion are each configured in a plate shape, A sheet mounting structure, wherein the plate thickness of each of the two or more connecting portions is greater than the plate thickness of each of the first joint portion and the second joint portion.

2. The seat mounting structure according to claim 1 , wherein the mounting surface is provided on the vehicle body floor.

3. a third rail member; a fourth rail member that guides the third rail member movably in a second direction perpendicular to the first direction; Furthermore, The seat mounting structure according to claim 1 , wherein the mounting surface is provided on the third rail member.

4. A horizontal frame attached to the seat, a fixing member attached to the horizontal frame; a third rail member attached to the fixed member; a fourth rail member fixed to the vehicle body floor and movably guiding the third rail member; Equipped with The fixing member is a first joint portion joined to the horizontal frame; a second joint portion joined to the third rail member; two or more connection portions connecting the first joint portion and the second joint portion; Equipped with the fixing member is an aluminum alloy extrusion, The two or more connection portions, the first joint portion, and the second joint portion are each configured in a plate shape, A sheet mounting structure, wherein the plate thickness of each of the two or more connecting portions is greater than the plate thickness of each of the first joint portion and the second joint portion.

5. A horizontal frame attached to the seat, a fixing member attached to the lateral frame and the vehicle body floor, and fixing the seat portion to the vehicle body floor; Equipped with The fixing member is a first joint portion joined to the horizontal frame; a second joint portion joined to the vehicle body floor; two or more connection portions connecting the first joint portion and the second joint portion; Equipped with the fixing member is an aluminum alloy extrusion, The two or more connection portions, the first joint portion, and the second joint portion are each configured in a plate shape, A sheet mounting structure, wherein the plate thickness of each of the two or more connecting portions is greater than the plate thickness of each of the first joint portion and the second joint portion.

6. The seat mounting structure according to claim 1 , wherein the fixing member has a closed cross-sectional shape in a cross section along the vehicle vertical direction.

7. The seat mounting structure according to claim 6, wherein the fixing member has a closed cross-sectional shape in a cross section perpendicular to the vehicle longitudinal direction.

8. 8. The seat mounting structure according to claim 6, wherein the closed cross-sectional shape is a triangle.

9. The seat mounting structure according to claim 6 or 7, wherein the closed cross-sectional shape is rectangular.

Images