Vehicle seat and installation method thereof

Abstract

To provide a vehicle seat which can easily locate a seat back at a desired position with respect to a hinge pin and a backward tilt stopper pin when attaching the seat back to a vehicle body side, and an installation method of the same.SOLUTION: A backward tilt stopper pin 34 is located diagonally above the rear of a seat with respect to a hinge pin 32. The backward tilt stopper pin 34 is attached to a vehicle body 50 side via an attachment bracket 36 and contacts a back face part 14B of a seat back 14, thereby regulating backward tilt of the seat back 14. Further, the backward tilt stopper pin 34 contacts a lower end surface 14E of the seat back 14 in the state that the seat back 14 is folded forward, and a projection tip position thereof is positioned on a sheet width direction inner side with respect to a projection tip position of the hinge pin 32.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat and an installation method thereof. [Background technology]

[0002] The following Patent Document 1 discloses a vehicle seat in which a shaft attached to the vehicle body and extending in the seat width direction is inserted into a mounting hole formed on the side of the seat back, allowing the seat back to rotate around the axis of the shaft. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-12435 Summary of the Invention [Problem to be solved by the invention]

[0004] In some vehicle seats equipped with a seat back that can rotate around an axis in the seat width direction, a hinge pin for rotating the seat back and a rearward tilt stopper pin for restricting the rearward tilt of the seat back are attached to the vehicle body in correspondence with one side of the seat back in the seat width direction.

[0005] However, with this configuration, when attaching the seat back to the vehicle body, it takes time and effort to position the seat back at a desired position relative to the hinge pin and the rearward tilt stopper pin.

[0006] In consideration of the above, the present invention aims to provide a vehicle seat and an installation method therefor that can easily position the seat back in a desired position relative to the hinge pin and rearward tilt stopper pin when attaching the seat back to the vehicle body. [Means for solving the problem]

[0007] The vehicle seat of the present invention described in claim 1 comprises: a seat cushion that supports the buttocks and thighs of a seated occupant; a seat back that is provided on the rear end side of the seat cushion to support the back of the seated occupant and has a bearing hole formed on the lower end side of one of its side surfaces; a support mechanism that is provided on the lower part of the other side surface of the seat back and is attached to the vehicle body and supports the seat back so that it can be tilted forward and locked; a hinge pin that is attached to the vehicle body on the opposite side of the bearing hole, protrudes inward in the seat width direction along the seat width direction, is inserted into the bearing hole, and forms a tilting central axis of the seat back; and a rearward tilt stopper pin that is positioned diagonally upward and rearward of the seat with respect to the hinge pin and is attached to the vehicle body, protrudes inward in the seat width direction along the seat width direction and abuts against the back surface of the seat back to restrict the rearward tilt of the seat back, and further abuts against the lower end side of the seat back when the seat back is in one of the forward-tilted and forward-inclined states, and has a protruding tip position that is located more inward in the seat width direction than the protruding tip position of the hinge pin.

[0008] According to the above-described configuration, the seat back has a bearing hole formed at the lower end of one side surface thereof. A support mechanism is provided at the bottom of the other side surface of the seat back, and this support mechanism is attached to the vehicle body and supports the seat back so that it can be tilted forward and locked. A hinge pin attached to the vehicle body on the opposite side of the bearing hole protrudes inward in the seat width direction along the seat width direction and is inserted into the bearing hole, forming a central axis for tilting the seat back. Furthermore, a rearward tilt stopper pin is disposed diagonally upward and rearward of the seat relative to the hinge pin. This rearward tilt stopper pin is attached to the vehicle body, protrudes inward in the seat width direction along the seat width direction, and abuts against the back surface of the seat back to restrict rearward tilt of the seat back.

[0009] Here, the rearward-tilt stopper pin abuts against the lower end of the seat back when the seat back is in one of the forward-tilted and forward-reclining positions, and its protruding tip is located more inward in the seat width direction than the protruding tip of the hinge pin. With this configuration, the rearward-tilt stopper pin can be used to position the seat back in the fore-and-aft direction when attaching the seat back to the vehicle body. That is, the seat back before attachment can be placed in one of the forward-tilted and forward-reclining positions forward of its attachment position, and then moved toward the rear of the seat so that the lower end of the seat back abuts against the rearward-tilt stopper pin, thereby positioning the seat back in the fore-and-aft direction.

[0010] The vehicle seat of the present invention as set forth in claim 2 is the configuration of claim 1, wherein a lower end of the seat back has a rigidity higher than that of the seat back pad. 、 When the seat back is in one of the two positions 、 The rearward tilt stopper pin or the rear surface of the seat back skin at the portion where the rearward tilt stopper pin abuts; As they come into contact 、 The pin contact portion is provided such that the contact area extends continuously in the seat width direction.

[0011] According to the above configuration, the pin abutment portion provided on the lower end side of the seat back has higher rigidity than the seat back pad. 、 When the seat back is in one of the above positions 、 Rearward tilt stopper pin and or the back surface of the seat back skin where the rearward tilt stopper pin abuts. As they come into contact 、 With this configuration, after the seat back is positioned in the fore-and-aft direction by the rearward tilt stopper pin when attaching the seat back to the vehicle body, the pin abutment portion that is continuous in the seat width direction can be moved along the rearward tilt stopper pin that extends in the seat width direction, thereby easily moving the bearing hole in the seat back toward the hinge pin.

[0012] The vehicle seat of the present invention as set forth in claim 3 is configured as set forth in claim 2, further comprising: The aboveThe lower end of the skin has a front bottom gusset portion that extends from the front end of the seat back in the fore-and-aft direction and covers the front part of the bottom of the seat back pad, and a rear bottom gusset portion that extends from the rear end of the seat back in the fore-and-aft direction and covers the rear part of the bottom of the seat back pad, and the lower end of the seat back is provided with a pair of engaging members that are attached to the rear end of the front bottom gusset portion and the front end of the rear bottom gusset portion, respectively, and engage with each other to connect the front bottom gusset portion and the rear bottom gusset portion, and a portion of the pair of engaging members also serves as the pin abutment portion.

[0013] According to the above-mentioned configuration, a pair of engaging members are provided to connect the front bottom gusset portion and the rear bottom gusset portion, and a part of the pair of engaging members also serves as the pin abutment portion. With this configuration, the pin abutment portion can provide a guide function when attaching the seat back to the vehicle body without increasing the number of parts.

[0014] The vehicle seat of the present invention described in claim 4 is configured in the configuration described in claim 3 such that when the seat back is in one of the two states, a portion of the pair of engaging members indirectly abuts against the underside of the rearward tilt stopper pin via the rear bottom surface gusset portion as the pin abutment portion.

[0015] According to the above configuration, when the seat back is in one of the positions, parts of the pair of engaging members indirectly abut the lower side of the rearward tilt stopper pin via the rear bottom gusset portion as pin abutment parts. Therefore, even if the lower end of the seat back is positioned above the rear end of the seat cushion with a gap, for example, it is easy to grasp the height position of the lower end of the seat back when attaching the seat back to the vehicle body. In other words, after positioning the seat back in the seat fore-and-aft direction with the rearward tilt stopper pin when attaching the seat back to the vehicle body, the height position of the lower end of the seat back can be determined by fine-tuning the height position of the lower end of the seat back so that parts of the pair of engaging members indirectly abut the lower side of the rearward tilt stopper pin.

[0016] The vehicle seat of the present invention described in claim 5 has the configuration described in any one of claims 1 to 4, and has a mounting bracket attached to the vehicle body to which both the hinge pin and the rearward tilt stopper pin are attached, and the mounting bracket and the lower part of one of the side portions of the seat back are adjacent to and facing each other in the seat width direction.

[0017] According to the above configuration, the mounting bracket, to which both the hinge pin and the rearward tilt stopper pin are attached, is attached to the vehicle body, and this mounting bracket and the lower part of one side surface of the seat back are adjacent to and face each other in the seat width direction. With this configuration, when attaching the seat back to the vehicle body, the seat back is positioned in the fore-and-aft direction with the rearward tilt stopper pin, and then the seat back is moved in the seat width direction until the lower part of one side surface of the seat back abuts against the mounting bracket, thereby making it possible to determine the seat width direction position of the seat back during the installation process.

[0018] The method for installing a vehicle seat of the present invention described in claim 6 is a method for installing a vehicle seat described in any one of claims 1 to 5, and includes a step of positioning the seat back before installation in one of a forward-leaning position and a forward-tilting position on the seat front side of its installation position, and moving the seat back in one of the positions toward the rear side of the seat to abut the lower end side of the seat back in the vertical direction against the rearward tilt stopper pin, thereby positioning the lower end side of the seat back in the vertical direction in the seat front-rear direction.

[0019] According to the above configuration, the seat back before installation is placed in one of a forward-leaning position and a forward-tilting position in front of the installation position, and the seat back in one of the positions is moved toward the rear of the seat so that the lower end of the seat back in the vertical direction of the seat back abuts against the rearward-tilting stopper pin, thereby positioning the lower end of the seat back in the vertical direction of the seat back in the front-rear direction of the seat. This makes it easy to position the lower end of the seat back in the vertical direction of the seat back in the front-rear direction of the seat. [Effects of the Invention]

[0020] As described above, the present invention has the excellent effect of allowing the seat back to be easily positioned at a desired position relative to the hinge pin and rearward tilt stopper pin when attaching the seat back to the vehicle body. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a perspective view showing a vehicle seat according to an embodiment of the present invention; [Figure 2] 2 is a perspective view showing the seat back of FIG. 1 in a forward-folded state, as viewed from a different direction than FIG. 1. FIG. [Figure 3] 2. FIG. 4 is a perspective view showing the seat back in the forward-folded state of FIG. 1, as viewed from a different direction than FIG. [Figure 4] 2 is an enlarged vertical cross-sectional view showing a part of the lower right side of the vehicle seat with the seat back in an upright position in FIG. 1. FIG. [Figure 5] 2 is an exploded perspective view showing an enlarged view of a main part of the vehicle seat of FIG. 1. FIG. [Figure 6] 3 is an enlarged perspective view showing a main part of the vehicle seat with the seat back in a forward-folded state in FIG. 2. FIG. [Figure 7] FIG. 7 is an enlarged cross-sectional view showing a state cut along line 7-7 in FIG. 6. [Figure 8] FIG. 6 is a perspective view showing a state in which the hinge pin and the rearward tilt stopper pin of FIG. 5 are attached to the mounting bracket. [Figure 9] 9 is a partially cutaway view of the mounting bracket to which the hinge pin and rearward tilt stopper pin of FIG. 8 are attached, viewed obliquely from above and in front of the seat. FIG. [Figure 10] FIG. 2 is a perspective view illustrating a first step of a method for installing a vehicle seat. [Figure 11] 11 is an enlarged plan view showing a main part of FIG. 10. FIG. [Figure 12] FIG. 10 is a perspective view illustrating a second step of the vehicle seat installation method. [Figure 13] FIG. 10 is a perspective view illustrating a third step of the vehicle seat installation method. DETAILED DESCRIPTION OF THE INVENTION

[0022] A vehicle seat 10 according to one embodiment of the present invention and an installation method thereof will be described below with reference to Figures 1 to 13. Note that arrows FR, UP, and RH, which are appropriately shown in the drawings, indicate the forward direction, upward direction, and rightward direction of the vehicle seat 10, respectively. Hereinafter, when the directions of front-rear, up-down, and left-right are simply used in the description, they refer to front-rear in the seat front-rear direction, up-down in the seat up-down direction, and left-right in the seat left-right direction (seat width direction), unless otherwise specified. Also, in each drawing, some symbols may be omitted to make the drawings easier to read.

[0023] (Configuration of the embodiment) Fig. 1 shows a perspective view of a vehicle seat 10 placed in a vehicle cabin as seen from the right side and the upper front side of the seat. As shown in Fig. 1, the vehicle seat 10 of this embodiment is, as an example, a seat for two people on the left and right, and can be used as part of the rear seats of a passenger car or part of the seats of a truck, for example.

[0024] The vehicle seat 10 includes a seat cushion 12 that supports the buttocks and thighs of a seated occupant, a seat back 14 that supports the back of the seated occupant, and a headrest 16 that supports the head of the seated occupant. The seat cushion 12 is fixedly mounted on the floor 52 side of a vehicle body 50. The seat back 14 is mounted on the rear end side of the seat cushion 12 and is capable of changing its position between an upright position indicated by a solid line and a forward-leaning position indicated by a two-dot chain line.

[0025] Fig. 2 is a perspective view of the seat back 14 in a forward-folded state, as viewed from the upper front side of the seat and to the left. Fig. 3 is a perspective view of the seat back 14 in a forward-folded state, as viewed from the upper front side of the seat and slightly to the right. As shown in Figs. 2 and 3, the seat back 14 in the forward-folded state is placed on top of the seat cushion 12, with the back surface 14B facing upward.

[0026] Fig. 4 shows an enlarged longitudinal cross-sectional view of a portion of the lower right side of the vehicle seat 10 with the seat back 14 in an upright position. As shown in Figs. 2 to 4, the seat back 14 includes a seat back frame 20 constituting a framework, a seat back pad 22 (see Fig. 4) supported by the seat back frame 20, and a cover (sometimes referred to as "trim") 24 that covers the seat back pad 22. The headrest 16 shown in Figs. 2 and 3 includes a headrest stay 16S connected to the upper end of the seat back 14, a headrest pad (not shown) supported by the headrest stay 16S, and a cover 16C that covers the headrest pad. The cover 16C of the headrest 16 is provided continuously with the cover 24 of the seat back 14.

[0027] As shown in FIG. 3, the seatback frame 20 includes a frame-shaped frame 20A made of pipes and shaped like a frame in rear view, a left side frame 20L joined to the left side of the frame 20A, and a right side frame 20R joined to the right side of the frame 20A. The left side frame 20L and the right side frame 20R are arranged with the seatback vertical direction as their longitudinal direction, and their cross-sections perpendicular to the longitudinal direction are generally U-shaped, with the opening facing inward in the seat width direction along their entire longitudinal length. The lower portion of the right side frame 20R in the seatback vertical direction is located lower than the lower portion of the frame 20A in the seatback vertical direction. As shown in FIG. 3, a seatback pad 22 is not provided on the back side of the lower portion of the right side frame 20R in the seatback vertical direction. As shown in FIG. 3, a reinforcing member 20D is bridged across the center of the frame 20A in the seat width direction. Furthermore, a plurality of wires 20E are arranged inside the frame 20A in a state where they are supported by the frame 20A.

[0028] 4, the cover 24 includes a cover main body 24A that forms the main body of the cover 24 and has an opening 24H at its lower end, a front bottom gusset portion 24B provided at the front of the opening 24H of the cover main body 24A, and a rear bottom gusset portion 24C provided at the rear of the opening 24H of the cover main body 24A. The front bottom gusset portion 24B and the rear bottom gusset portion 24C form the lower end of the cover 24 and are joined to each other (described in detail below). The front bottom gusset portion 24B is sewn to the front edge of the opening 24H of the cover main body 24A at a sewing portion S1 and extends from the front end of the lower end of the cover 24 in the seat back front-rear direction to cover the front bottom portion of the seatback pad 22. The rear bottom gusset portion 24C is sewn to the rear edge of the opening 24H of the skin main body 24A at a stitching portion S2, and extends from the rear end of the lower end of the skin 24 in the seat back front-rear direction to cover the rear bottom portion of the seat back pad 22.

[0029] A pair of engaging members, a J hook 26 and an arrow 28, are provided at the lower end of the seat back 14. The J hook 26 is attached to the rear end of the front bottom gusset portion 24B, and the arrow 28 is attached to the front end of the rear bottom gusset portion 24C. The J hook 26 and the arrow 28 are made of soft resin.

[0030] The arrow 28 is formed in a generally rectangular plate shape and is disposed with its longitudinal direction extending in the left-right direction of the seat back and its lateral direction extending in the generally front-rear direction of the seat back. One lateral end of the arrow 28 (the end on the left in the drawing) is formed with a protrusion 28A that protrudes toward one side in the thickness direction of the arrow 28. The other lateral end of the arrow 28 (the right in the drawing) is sewn to the front end of the rear bottom gusset portion 24C at a stitching portion S4.

[0031] The J hook 26 is formed in a bent plate shape and is disposed with its longitudinal direction aligned with the left-right direction of the seat back when viewed from above the seat back. Its cross section viewed from the longitudinal direction is J-shaped. The J hook 26 has a U-shaped portion 26A into which one short-side end (the end on the left in the drawing) of the arrow 28 is inserted. The inside of the U-shaped portion 26A has a latching portion 26B to which the protrusion 28A is latched. The end of the J hook 26 opposite the U-shaped portion 26A (the right in the drawing) is sewn to the rear end of the front bottom gusset portion 24B at a stitching portion S3. The J hook 26 and the arrow 28 engage with each other as shown in FIG. 4 to connect the front bottom gusset portion 24B and the rear bottom gusset portion 24C.

[0032] FIG. 5 is an exploded perspective view showing an enlarged view of the lower right side and side portions of the seat back 14, which are essential parts of the vehicle seat 10. As shown in FIG. 5, a bearing hole 30 is formed in the lower end of the side surface portion 14C on the right side (one side) of the seat back 14. The bearing hole 30 includes a short cylindrical portion 20R1 (see FIG. 6) formed in the lower end portion of the right side frame 20R. A hinge pin 32 is inserted into the bearing hole 30 of the seat back 14 (see FIG. 6). The hinge pin 32 is attached to the vehicle body 50 (see FIG. 1) via a mounting bracket 36 on the opposite side of the bearing hole 30, protrudes inward in the seat width direction W, and forms a central axis for tilting the seat back 14. The hinge pin 32 and the mounting bracket 36 will be described in detail below.

[0033] 2, a support mechanism 18 attached to the vehicle body 50 is provided at the bottom of a side surface 14D on the left side (other) of the seat back 14. The support mechanism 18 includes a bracket 18A fixed to the side of a vertical wall 54 constituting the vehicle body 50, a rotating member 18C fixed to the bottom of the side surface 14D of the seat back 14 and rotatable about an axis 18B in the seat width direction relative to the bracket 18A, and a lever 18D for locking and unlocking the upright position. In other words, the support mechanism 18 supports the seat back 14 so that it can be tilted forward and locked. Note that well-known technology can be applied to the support mechanism 18, and therefore a detailed description thereof will be omitted.

[0034] As shown in Fig. 1, a rearward tilt stopper pin 34 is disposed diagonally upward and rearward of the seat with respect to the hinge pin 32, and this rearward tilt stopper pin 34 is attached to a vertical wall portion 54 that constitutes the vehicle body 50 via a mounting bracket 36. As shown in Fig. 3, the rearward tilt stopper pin 34 protrudes inward in the seat width direction W. As shown in Figs. 1 and 4, the rearward tilt stopper pin 34 abuts against a back surface portion 14B of the seat back 14, thereby restricting the rearward tilt of the seat back 14.

[0035] Fig. 6 shows an enlarged perspective view of a main portion of the vehicle seat 10 (the lower right side of the seat back 14 and its side portion) when the seat back 14 is in a forward tilted state. Fig. 7 shows an enlarged cross-sectional view taken along line 7-7 in Fig. 6. As shown in Figs. 6 and 7, the rearward tilt stopper pin 34 is set to abut against the lower end of the seat back 14 (more specifically, the lower end surface 14E) when the seat back 14 is in a forward tilted state (described in detail later). Although not shown in the drawings, the rearward tilt stopper pin 34 abuts against the lower end of the seat back 14 even when the seat back 14 is in a forward tilted state.

[0036] As shown in FIG. 7, a pin abutment portion 26C having higher rigidity than the seat back pad 22 and indirectly abutting against the rearward tilt stopper pin 34 when the seat back 14 is tilted forward is provided on the lower end side of the seat back in the up-down direction. As shown in FIG. 6, the pin abutment portion 26C has an abutment region that indirectly abuts against the rearward tilt stopper pin 34 when the seat back 14 is tilted forward, and the abutment region extends continuously in the seat width direction. In this embodiment, a portion of the J hook 26 described above also serves as the pin abutment portion 26C. More specifically, as shown in FIG. 7, when the seat back 14 is tilted forward, the folded-back portion of the U-shaped portion 26A of the J hook 26 is configured to indirectly abut against the underside of the rearward tilt stopper pin 34 via the rear bottom surface gusset portion 24C as the pin abutment portion 26C.

[0037] Figure 8 shows a perspective view of the hinge pin 32 and the rearward tilt stopper pin 34 attached to the mounting bracket 36. Figure 9 shows a partially cutaway view of the mounting bracket 36 to which the hinge pin 32 and the rearward tilt stopper pin 34 are attached, viewed from diagonally above and in front of the seat. As shown in Figures 8 and 9, the protruding tip of the rearward tilt stopper pin 34 is set to be located more inward in the seat width direction than the protruding tip of the hinge pin 32.

[0038] As shown in Fig. 8, the mounting bracket 36 is formed in a generally L-shape overall and includes a flat vehicle body mounting portion 36A and a pin support portion 36B erected from one end of the vehicle body mounting portion 36A on the inner side in the seat width direction. The vehicle body mounting portion 36A is attached to the vertical wall portion 54 of the vehicle body 50 by a fastener (not shown). The pin support portion 36B rises from the vehicle body mounting portion 36A diagonally upward and forward of the seat (see Fig. 1). Both the hinge pin 32 and the rearward tilt stopper pin 34 are attached to the pin support portion 36B.

[0039] 5, the pin support portion 36B includes an outer component 36B1 that is substantially U-shaped and has an open side toward the rear of the seat when viewed from the outside in the seat width direction, and an inner vertical wall portion 36B2 that is formed continuously on the inside of the outer component 36B1 when viewed from the outside in the seat width direction. The outer component 36B1 bulges outward in the seat width direction, and its cross-sectional shape perpendicular to the extension direction when viewed from the outside in the seat width direction is substantially U-shaped and has an open side toward the inside in the seat width direction. In other words, the inner vertical wall portion 36B2 is located on the inside in the seat width direction with respect to a bulging apex 36BT, which is the apex of the outer component 36B1 on the side that bulges outward in the seat width direction.

[0040] A portion of the bulging top portion 36BT of the outer component 36B1 near a corner on the front side in the seat longitudinal direction and on the lower side in the seat vertical direction is defined as a hinge pin seat portion 36BS, which has a larger area as viewed from the outside in the seat width direction than other portions of the bulging top portion 36BT. A mounting hole 36B3 for mounting the hinge pin 32 is formed through the hinge pin seat portion 36BS. In addition, a mounting hole 36B4 for mounting the rearward tilt stopper pin 34 is formed through the inner vertical wall portion 36B2 at a portion on the front side in the seat longitudinal direction and in the middle in the seat vertical direction.

[0041] 9, the axial dimension of the rearward tilt stopper pin 34 is larger than the axial dimension of the hinge pin 32. In addition, because the inner vertical wall portion 36B2 is set more inward in the seat width direction than the hinge pin seat portion 36BS, the position of the protruding tip of the rearward tilt stopper pin 34 is set significantly more inward in the seat width direction than the position of the protruding tip of the hinge pin 32. The diameter of the rearward tilt stopper pin 34 is set larger than the diameter of the hinge pin 32.

[0042] 6, the mounting bracket 36 and the lower part of the side surface portion 14C on the right side (one side) of the seat back 14 are adjacent to each other in the seat width direction and face each other. A small gap is provided between the mounting bracket 36 and the lower part of the side surface portion 14C on the right side (one side) of the seat back 14. This gap is provided to prevent friction from occurring between the mounting bracket 36 and the lower part of the side surface portion 14C on the right side of the seat back 14 when the seat back 14 is displaced relative to the mounting bracket 36.

[0043] (Method of installing the vehicle seat 10) Next, a method for installing the vehicle seat 10 shown in FIG. 1 (procedure for mounting the vehicle seat 10) will be described with reference to FIGS.

[0044] First, as shown by the two-dot chain line in Figure 10, the seat back 14 before installation is placed in a forward-tilted position on the seat cushion 12, in front of its installation position and slightly shifted to the left side of the seat, and the seat back 14 in this forward-tilted position is moved toward the rear of the seat (in the direction of arrow A) so that the lower end of the seat back 14 in the vertical direction (more specifically, the lower end surface 14E) abuts against the rearward tilt stopper pin 34, as shown in Figures 10 and 11, thereby positioning the lower end of the seat back 14 in the vertical direction in the front-to-rear direction of the seat (first step).

[0045] Next, as shown in Figure 12, the height position of the lower end of the seat back 14 is finely adjusted in the vertical direction (direction of arrow B), and the pin abutment portion 26C (part of the J hook 26) abuts against the rearward tilt stopper pin 34 on the lower end surface 14E side of the seat back 14 shown in Figure 7, thereby determining the height position of the lower end side of the seat back 14 in the vertical direction (second step).

[0046] Next, the seat back 14, which is in the position indicated by the two-dot chain line in Fig. 13, is moved to the right in the seat width direction until it abuts against the mounting bracket 36, thereby determining the seat width direction position during the installation of the seat back 14 (third step). Then, the seat width direction position of the seat back 14 is finely adjusted to the state shown in Fig. 2, and the bracket 18A of the support mechanism 18 provided at the bottom of the side surface portion 14D on the left side (other) of the seat back 14 is bolted to the vertical wall portion 54 side that constitutes the vehicle body 50 (fourth step). In this way, the vehicle seat 10 is installed.

[0047] In the first half of the process of rotating the seat back 14 from the forward tilted position to the upright position shown in FIG. 1, the rearward tilt stopper pin 34 is displaced while elastically deforming a part of the seat back pad 22 (see FIG. 4).

[0048] (Actions and Effects of the Embodiments) Next, the operation and effects of the above embodiment will be described.

[0049] In this embodiment, as shown in Fig. 2, a support mechanism 18 is provided on the lower part of the side surface 14D on the left side of the seat back 14. This support mechanism 18 is attached to the vehicle body 50 and supports the seat back 14 so that it can be tilted forward and locked. A hinge pin 32 attached to the vehicle body 50 via a mounting bracket 36 shown in Fig. 1 is inserted into a bearing hole 30 (see Fig. 5) in a side surface 14C on the right side of the seat back 14, forming a central axis for tilting the seat back 14. A rearward tilt stopper pin 34 is disposed diagonally upward and rearward from the hinge pin 32. This rearward tilt stopper pin 34 is attached to the vehicle body 50 via a mounting bracket 36 and, as shown in Fig. 4, contacts a back surface 14B of the seat back 14, thereby restricting the rearward tilt of the seat back 14.

[0050] Here, as shown in Fig. 6, the rearward tilt stopper pin 34 abuts against the lower end side of the seat back 14 (here, the lower end surface 14E) when the seat back 14 is in a forward tilted state, and as shown in Fig. 9, the protruding tip of the rearward tilt stopper pin 34 is located more inward in the seat width direction than the protruding tip of the hinge pin 32. In this configuration, as shown in Fig. 10, the rearward tilt stopper pin 34 can be used to position the seat back 14 in the front-rear direction when attaching the seat back 14 to the vehicle body 50 (see Fig. 1).

[0051] 7, the pin abutment portion 26C provided on the lower end side of the seat back 14 (here, the lower end surface 14E) has higher rigidity than the seat back pad 22, indirectly abuts against the rearward tilt stopper pin 34 when the seat back 14 is in the forward tilted state, and the abutment area extends continuously in the seat width direction. In this configuration, when the seat back 14 is attached to the vehicle body 50 (see FIG. 2), the seat back 14 is positioned in the seat fore-and-aft direction by the rearward tilt stopper pin 34, and then the pin abutment portion 26C, which is continuous in the seat width direction W shown in FIG. 6, can be moved along the rearward tilt stopper pin 34 extending in the seat width direction, thereby easily moving the bearing hole 30 of the seat back 14 toward the hinge pin 32.

[0052] 7, in this embodiment, a J hook 26 and an arrow 28 (see FIG. 7) are provided to connect the front bottom gusset portion 24B and the rear bottom gusset portion 24C, and a portion of the J hook 26 also serves as the pin abutment portion 26C. With this configuration, the pin abutment portion 26C can provide a guide function when attaching the seat back 14 to the vehicle body 50 (see FIG. 2) without increasing the number of parts.

[0053] Furthermore, in this embodiment, when the seat back 14 is in the forward-tilted state, a portion of the J hook 26 indirectly abuts, as the pin abutment portion 26C, on the underside of the rearward tilt stopper pin 34 via the rear bottom gusset portion 24C. Therefore, even in a structure in which the lower end of the seat back 14 is disposed above the rear end of the seat cushion 12 as shown in FIG. 1 with a gap therebetween, it is easy to grasp the height position of the lower end of the seat back 14 when attaching the seat back 14 to the vehicle body 50. That is, when attaching the seat back 14 to the vehicle body 50, the seat back 14 is positioned in the front-to-rear direction using the rearward tilt stopper pin 34 shown in FIG. 7, and then the height position of the lower end of the seat back 14 in the up-down direction can be determined by fine-tuning the height position of the lower end of the seat back 14 in the up-down direction so that a portion of the J hook 26 indirectly abuts on the underside of the rearward tilt stopper pin 34 via the rear bottom gusset portion 24C.

[0054] 6 is attached to the vehicle body 50 (see FIG. 1, etc.), and the mounting bracket 36 and the lower part of the side surface portion 14C on the right side of the seat back 14 are adjacent to and face each other in the seat width direction W. In this configuration, when attaching the seat back 14 to the vehicle body 50 (see FIG. 1, etc.), the rearward tilt stopper pin 34 is used to position the seat back 14 in the seat front-rear direction, and then the seat back 14 is moved in the seat width direction until the lower part of the side surface portion 14C on the right side of the seat back 14 abuts against the mounting bracket 36, as shown in FIG. 13, thereby determining the seat width direction position of the seat back 14 during the installation process.

[0055] As described above, according to this embodiment, when attaching the seat back 14 shown in Fig. 1 etc. to the vehicle body 50, the seat back 14 can be easily positioned at a desired position with respect to the hinge pin 32 and the rearward tilt stopper pin 34. To further explain, when an operator attaches the seat back 14 to the vehicle body 50, the attachment portion is not visible to the operator, resulting in so-called blind work. However, according to this embodiment, the seat back 14 can be easily positioned at a desired position, improving the attachability of the seat back 14.

[0056] (Supplementary explanation of the embodiment) As a modification of the above embodiment, the rearward tilt stopper pin may be configured so that it does not contact the lower end of the seat back when the seat back is in the forward tilted position, but does contact the lower end of the seat back when the seat back is in the forward tilted position.

[0057] 6 and 7, the pin abutment portion 26C is provided on the lower end surface 14E of the seat back 14, but a configuration without the pin abutment portion 26C is also possible. Also, in the above embodiment, the pin abutment portion 26C is configured to indirectly abut against the rearward tilt stopper pin 34 when the seat back 14 is tilted forward, but as a modification of the above embodiment, the pin abutment portion may be configured to directly abut against the rearward tilt stopper pin when the seat back is tilted forward, or the pin abutment portion may be configured to directly or indirectly abut against the rearward tilt stopper pin when the seat back is tilted forward.

[0058] In addition, in the above embodiment, a part of the J hook 26 (a part of the pair of engaging members) doubles as the pin abutment portion 26C, but as a modification of the above embodiment, a dedicated pin abutment portion may be separately provided instead of being double-purposed.

[0059] Furthermore, in the above embodiment, when the seat back 14 is in the forward-tilted state, a portion of the J hook 26 (a portion of the pair of engaging members) indirectly abuts as the pin abutment portion 26C on the underside of the rearward-tilt stopper pin 34 via the rear bottom surface gusset portion 24C, but as a modification of the above embodiment, a portion of the J hook (a portion of the pair of engaging members) may be configured to indirectly abut as the pin abutment portion on the underside of the rearward-tilt stopper pin via the rear bottom surface gusset portion when the seat back is in the forward-tilted state. Furthermore, as another modification, a portion of the J hook (a portion of the pair of engaging members) may be configured to directly or indirectly abut as the pin abutment portion on the seat front side of the rearward-tilt stopper pin when the seat back is in one of the forward-tilted state and the forward-tilted state.

[0060] Furthermore, in the above embodiment, as shown in FIG. 1 etc., a mounting bracket 36 is provided that is attached to the vehicle body 50 and to which both the hinge pin 32 and the rearward lean stopper pin 34 are attached. However, a configuration may also be adopted in which such a mounting bracket 36 is not provided and the hinge pin and the rearward lean stopper pin are separately attached to the vehicle body.

[0061] Furthermore, in the above embodiment, as shown in FIG. 9, the axial dimension of the rearward tilt stopper pin 34 is larger than the axial dimension of the hinge pin 32, and such a configuration is preferable; however, it is also possible, for example, for the axial dimension of the rearward tilt stopper pin (34) to be equal to or smaller than the axial dimension of the hinge pin (32), and for the difference between the two dimensions to be smaller than the difference in the seat width direction positions of the inner vertical wall portion (36B2) and the hinge pin seat portion (36BS).

[0062] Furthermore, in the method of installing the vehicle seat 10 of the above embodiment, the first to third steps shown in Figures 10 to 12 are performed with the seat back 14 in a forward-tilted position. However, as a variation of the above embodiment, depending on the shape of the seat back, it is also possible to adopt a configuration in which the seat back is in a forward-inclined position instead of a forward-tilted position and the first to third steps are performed.

[0063] The above-described embodiment and the above-described modifications can be implemented in appropriate combinations.

[0064] The above describes one example of the present invention, but the present invention is not limited to the above, and it goes without saying that the present invention can be implemented in various modified forms within the scope of the gist of the present invention. [Explanation of symbols]

[0065] 10 Vehicle seats 12 seat cushions 14 Seat back 14B Back part 14C Right side of seat (one side) 14D Left side of seat (other side) 18 Support mechanism 22 Seat back pad 24 Epidermis 24B Front bottom gusset 24C Back bottom gusset 26 J hook (engagement member) 26C Pin contact area 28 Arrow (engagement member) 30 bearing holes 32 Hinge pin 34 Rearward tilt stopper pin 36 Mounting bracket 50 body W Sheet width direction

Claims

1. a seat cushion that supports the buttocks and thighs of a seated occupant; a seat back provided at a rear end portion of the seat cushion to support the back of a seated occupant, the seat back having a bearing hole formed at a lower end portion of one of the side surfaces; a support mechanism that is provided on a lower portion of the other side surface of the seat back and is attached to a vehicle body, and that supports the seat back in a forward-folding and lockable manner; a hinge pin attached to the vehicle body on the opposite side of the bearing hole, protruding inward in the seat width direction along the seat width direction and inserted into the bearing hole, and forming a tilting central axis of the seat back; a rearward tilt stopper pin that is disposed obliquely upward and rearward of the seat with respect to the hinge pin, is attached to the vehicle body, protrudes inward along the seat width direction and abuts against a back surface of the seat back to restrict the rearward tilt of the seat back, and further abuts against a lower end side of the seat back when the seat back is in one of a forward-tilted state and a forward-inclined state, and has a protruding tip position located more inward in the seat width direction than the protruding tip position of the hinge pin; A vehicle seat having:

2. 2. The vehicle seat according to claim 1, wherein a pin abutment portion is provided on the lower end side of the seat back, the pin abutment portion having a rigidity higher than that of a seat back pad, the pin abutment portion abutting against the rearward tilt stopper pin or abutting against the back surface of the seat back skin at the portion where the rearward tilt stopper pin abuts when the seat back is in one of the states, and the abutment area extends continuously in the seat width direction.

3. The lower end of the skin of the seat back has a front bottom gusset portion extending from a front end in the front-rear direction of the seat back to cover a front portion of a bottom surface of the seat back pad, and a rear bottom gusset portion extending from a rear end in the front-rear direction of the seat back to cover a rear portion of the bottom surface of the seat back pad, a pair of engaging members are provided at a lower end of the seat back, the engaging members being attached to a rear end of the front bottom gusset portion and a front end of the rear bottom gusset portion, respectively, and engaging with each other to connect the front bottom gusset portion and the rear bottom gusset portion; 3. The vehicle seat according to claim 2, wherein a portion of the pair of engaging members also serves as the pin abutment portion.

4. 4. The vehicle seat according to claim 3, wherein when the seat back is in one of the two states, a portion of the pair of engaging members indirectly abuts the lower side of the rearward tilt stopper pin via the rear bottom surface gusset portion as the pin abutment portion.

5. a mounting bracket attached to the vehicle body to which both the hinge pin and the rearward tilt stopper pin are attached, The vehicle seat according to any one of claims 1 to 4, wherein the mounting bracket and the lower portion of the one side surface portion of the seat back are adjacent to and face each other in the seat width direction.

6. The method for installing a vehicle seat according to any one of claims 1 to 5, A method for installing a vehicle seat, comprising the steps of: positioning the seat back before installation in one of a forward-leaning position and a forward-tilting position on the seat front side of the installation position; and moving the seat back in one of the positions toward the rear side of the seat to abut the lower end side of the seat back in the vertical direction against the rear-tilt stopper pin, thereby positioning the lower end side of the seat back in the vertical direction in the front-to-rear direction of the seat.

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