JP2014034248A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat capable of facilitating the work for temporarily fixing a back board to a seat back frame and then positioning a fixed part to a fixed position of the seat back frame.SOLUTION: A fixed part 72 which is fixed to a seat back frame and a temporary fixed part 71 which engages with the seat back frame and thereby is held by the seat back frame are provided at a back board (an inner board 53). The fixed part 72 and the temporary fixed part 71 are disposed so as to be located adjacent to each other.

Description

  The present invention relates to a vehicle seat having a seat back frame and a back board provided on the rear side of the seat back frame.

  2. Description of the Related Art Conventionally, a vehicle seat having a backboard provided with a hook portion for temporarily fixing to a seat back frame at an upper portion and a screw hole for fixing to the seat back frame is formed at a lower portion. It is known (see Patent Document 1).

Japanese Utility Model Publication No. 5-76354

  However, in the structure described above, since the hook portion and the screw hole are arranged apart from each other in the vertical direction, it is easily affected by manufacturing errors, and when the hook portion is engaged with the seat back frame, the screw hole is There is a case where it does not match with the fixing portion of the frame, and there is a possibility that the operation of aligning the screw hole with the fixing portion becomes complicated.

  Therefore, the present invention provides a vehicle seat that can facilitate the operation of positioning a screw hole (fixed portion) at a fixed position of the seat back frame after temporarily fixing the back board to the seat back frame. For the purpose.

  The present invention for solving the above problems is a vehicle seat having a seat back frame and a back board provided on the rear side of the seat back frame, and the back board is fixed to the seat back frame. And a temporary fixing portion that is held by the seat back frame by engaging with the seat back frame, and the fixing portion and the temporary fixing portion are adjacent to each other. To do.

  According to this, since the temporary fixing portion and the fixing portion are adjacent to each other, it is difficult to be affected by the manufacturing error. Therefore, after the temporary fixing portion is engaged with the engagement portion of the seat back frame, the temporary fixing portion is temporarily fixed by the manufacturing error. Even if the portion and the fixed part of the seat back frame are displaced, the amount of displacement is extremely small. Therefore, the operation of positioning the fixing portion at the fixing location can be facilitated.

  In the above-described configuration, it is preferable that the fixing portion and the temporary fixing portion are provided adjacent to the left and right in the lower portion of the backboard.

  Here, for example, when the fixing portion and the temporary fixing portion are adjacent to each other in the vertical direction, the fixing portion and the engaging portion of the seat back frame must also be provided in the vertical direction. There is a concern that the size of the component to which the is attached is increased in the vertical direction. On the other hand, by making the fixing portion and the temporary fixing portion adjacent to each other on the left and right, the vertical dimension of the seat back frame can be shortened, and the size can be reduced.

  Further, in the above-described configuration, one set of the fixing portion and the temporary fixing portion is provided on each of the left and right sides of the lower portion of the backboard, and the fixing portion is disposed on the outer side in the left-right direction than the temporary fixing portion. It is desirable.

  Here, for example, in the case where the fixing portion is arranged on the inner side in the left-right direction than the temporary fixing portion, when the left and right end portions of the backboard are pulled, a large moment is applied to the fixing portion away from the end portion, and the fixing portion There is a concern that it may come off the seat back frame. On the other hand, by arranging the fixing part on the outer side in the left-right direction than the temporary fixing part, the moment applied to the fixing part when the left and right ends of the backboard are pulled can be reduced, so the backboard and the seat Mounting rigidity with the back frame can be increased.

  Further, in the configuration described above, the seat back frame is disposed on a lower side of the hole with a hole with which the front end of the temporary fixing part is engaged, and the front end of the temporary fixing part is downwardly directed toward the hole. It is desirable that a first inclined surface to be guided upward is provided.

  Here, for example, if the first inclined surface that guides the tip of the temporary fixing portion from below to the hole is not provided below the hole with which the tip of the temporary fixing portion engages, the temporary fixing There is a concern that it is difficult to align the tip of the part with the hole in the vertical direction. On the other hand, by providing the first inclined surface on the lower side of the hole, the tip end of the temporary fixing portion can be guided to the hole in the vertical direction, so that the backboard can be easily attached.

  In the above-described configuration, it is preferable that a pair of second inclined surfaces that guide the tip of the temporary fixing portion toward the inner side in the left-right direction are provided on the left and right sides of the first inclined surface.

  Here, for example, when the second inclined surface that guides the front end of the temporary fixing portion toward the inner side in the left-right direction is not provided on the left and right of the first inclined surface, the front end of the temporary fixing portion is moved in the left-right direction. There is a concern that it is difficult to fit the hole. In contrast, by providing the second inclined surfaces on the left and right sides of the first inclined surface, the temporary fixing portion can be positioned in the left-right direction, so that the backboard can be easily attached.

  Further, in the above-described configuration, the first inclined surface and the second inclined surface are integrally formed as a concave portion, and the tip of the temporary fixing portion is formed on the upper edge portion forming the lower edge of the hole in the concave portion. Desirably configured to engage.

  Here, for example, when the first inclined surface is formed by cutting and raising the sheet metal and the second inclined surface is formed of a member different from the member on which the first inclined surface is formed, the upper end portion of the first inclined surface is formed. When the tip of the temporary fixing portion is engaged, there is a concern that the rigidity of the plate-like portion constituting the first inclined surface is low and the backboard cannot be temporarily fixed well. On the other hand, the first inclined surface and the second inclined surface are integrally formed as concave portions, so that the tip of the temporary fixing portion is engaged with the concave portion whose rigidity is increased by the concave shape. Can be stopped.

  In the above-described configuration, the width in the left-right direction of the tip of the temporary fixing portion may be smaller than the width in the left-right direction of the hole.

  According to this, the operation | work which attaches the front-end | tip of a temporary fix | stop part to a hole can be made easy.

  In the above configuration, when the seat back frame has a wire for supporting an occupant, it is desirable that the hole is provided at a position that does not overlap the wire when viewed from the rear side.

  Here, for example, when the hole and the wire are provided so as to overlap each other when viewed from the rear side, there is a concern that the tip of the temporary fixing part may interfere with the wire when the tip of the temporary fixing part is engaged with the hole. is there. On the other hand, by providing the hole and the wire at a position where they do not overlap when viewed from the rear side, it is possible to suppress the tip of the temporary fixing portion from interfering with the wire.

  Further, in the above-described configuration, the temporary fixing portion includes a base portion that protrudes forward from the backboard, and an engagement portion that protrudes forward from the base portion and engages with the seat back frame. It is desirable to form a bottomed cylinder that opens toward the opposite side of the fixed portion.

  Here, for example, when the base is formed in a solid state, there is a concern that the weight of the backboard increases. On the other hand, the weight of the backboard can be reduced by forming the base in a bottomed cylindrical shape.

  For example, when the opening of the bottomed cylindrical base portion is directed to the fixed portion, there is a concern that the rigidity of the fixed portion is lowered. On the other hand, since the wall corresponding to the bottom of the bottomed cylindrical base portion is adjacent to the fixed portion by directing the opening of the base portion to the side opposite to the fixed portion, the rigidity of the fixed portion can be increased.

  According to the present invention, since the temporary fixing portion and the fixing portion are adjacent to each other, it is difficult to be affected by a manufacturing error, so that the operation of positioning the fixing portion at the fixing portion can be facilitated.

  In addition, according to the present invention, the vertical dimension of the seat back frame can be shortened and the size can be reduced by making the fixing part and the temporary fixing part adjacent to each other on the left and right.

  In addition, according to the present invention, by disposing the fixing portion on the outer side in the left-right direction than the temporary fixing portion, it is possible to reduce the moment applied to the fixing portion when the left and right end portions of the backboard are pulled. Mounting rigidity between the backboard and the seatback frame can be increased.

  Further, according to the present invention, by providing the first inclined surface on the lower side of the hole, the tip end of the temporary fixing portion can be guided to the hole in the vertical direction, so that the backboard can be easily attached. Can do.

  Further, according to the present invention, the provision of the second inclined surfaces on the left and right sides of the first inclined surface enables the temporary fixing portion to be positioned in the left-right direction, thereby facilitating the mounting operation of the backboard. it can.

  Further, according to the present invention, since the first inclined surface and the second inclined surface are integrally formed as a concave portion, the tip of the temporary fixing portion is engaged with the concave portion whose rigidity is increased by the concave shape. Can be temporarily secured.

  In addition, according to the present invention, it is possible to facilitate the work of attaching the tip of the temporary fixing portion to the hole by making the width in the horizontal direction of the tip of the temporary fixing portion smaller than the width of the hole in the horizontal direction. .

  Moreover, according to this invention, it can suppress that the front-end | tip of a temporary fix part interferes with a wire by providing a hole and a wire in the position which does not overlap seeing from the back side.

  Further, according to the present invention, the backboard can be reduced in weight by forming the base portion in a bottomed cylindrical shape. Furthermore, since the wall corresponding to the bottom of the bottomed cylindrical base portion is adjacent to the fixing portion by directing the opening of the base portion to the side opposite to the fixing portion, the rigidity of the fixing portion can be increased.

1 is a perspective view of a vehicle seat as a vehicle seat according to an embodiment. It is a perspective view of a seat frame built in a vehicle seat. A perspective view (a) of the seatback pad as seen from the rear side, an arrow view (b) as seen from the I direction in FIG. 3 (a), and a II-II sectional view (c) in FIG. is there. It is the perspective view which looked at the vehicle seat from the rear side. It is sectional drawing of the left rear part of a seat back, and is sectional drawing (a) cut | disconnected by the step part vicinity of a seat back pad, and sectional drawing (b) cut | disconnected by side part structure part vicinity. It is a side view which shows a rod-shaped member. It is a disassembled perspective view which decomposes | disassembles and shows a backboard. It is an expansion perspective view which shows the lower part of an inner board. An enlarged perspective view (a) of the structure of the connection beam in the vicinity of the temporary fixing hole viewed from the rear side, a cross-sectional view (b) showing a state where the temporary fixing portion is engaged with the temporary fixing hole, and a temporary fixing hole They are a top view (c) seen from above and a cross-sectional view (d) showing a state in which the fixing part is fixed to the fixing hole. It is an expansion perspective view which shows the structure of a plate-shaped hook. They are a side view (a), a top view (b), and a front view (c) showing a state where a plate-like hook is formed on the engagement metal fitting.

  Next, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the following description, first, the overall configuration of a vehicle seat as an example of a vehicle seat will be briefly described, and then the characteristic part of the present invention will be described in detail.

  As shown in FIG. 1, the vehicle seat S is a seat used for a driver's seat of an automobile, and mainly includes a seat cushion S1, a seat back S2, and a headrest S3.

  A seat frame F as shown in FIG. 2 is built in the seat cushion S1 and the seat back S2. The seat frame F is mainly composed of a seat cushion frame F1 constituting a frame of the seat cushion S1 and a seat back frame F2 constituting a frame of the seat back S2. The seat cushion S1 is configured by covering a seat cushion frame F1 with a seat cushion pad made of a cushion member such as urethane foam and an outer skin member made of synthetic leather or fabric, and the seat back S2 is placed on the seat back frame F2. The seat back pad P (see FIG. 3) made of a cushion member and the skin member E (see FIG. 5) made of synthetic leather or fabric are covered.

The lower portion of the seat back frame F2 is rotatably connected to the rear portion of the seat cushion frame F1 via a reclining mechanism RL. As a result, the seat back S2 can tilt forward and backward with respect to the seat cushion S1.
In this specification, front and rear, left and right, and top and bottom are based on an occupant seated on the vehicle seat S in a state where the seat back S2 is not tilted by the reclining mechanism RL.

  The seat back frame F2 mainly includes an upper frame 10, left and right side frames 20, and a lower frame 30, and the upper frame 10, the left and right side frames 20, and the lower frame 30 are integrally formed by welding or the like. It is formed in a combined frame shape. And the pressure receiving member 40 and the wire 41 which receive the load from a passenger | crew are arrange | positioned inside this frame-shaped seat back frame F2.

  The upper frame 10 is made of a pipe material bent in a substantially U shape, and a pair of left and right support brackets 12 for attaching the headrest S3 are fixed to the front side of the horizontal pipe portion 11 extending in the left-right direction by welding. Yes. Further, the left and right vertical pipe portions 13 extending in the vertical direction of the upper frame 10 constitute a left and right side frame 20 integrally with the left and right main side frames 21 coupled to the lower portion thereof.

  A rigid wire 42 for engaging with the upper part of a backboard 50 (see FIG. 4), which will be described later, is provided on the upper part of the left and right vertical pipe parts 13 so as to extend right and left while being appropriately bent.

  The side frame 20 includes the above-described left and right vertical pipe portions 13, left and right main side frames 21, and a lower side frame 22.

  The left and right main side frames 21 are members that constitute an intermediate portion of the side frame 20, and are formed in a substantially U shape in sectional view by pressing a metal plate or the like, and are disposed to face in the left-right direction. The main side frame 21 is coupled to the vertical pipe portion 13 while holding the vertical pipe portion 13 at the upper portion thereof, and the lower portion of the main side frame 21 is formed to have a protruding portion 21a that projects forward from the upper portion. Has been.

  The left and right lower side frames 22 are members constituting the lower portion of the side frame 20, are formed in a substantially U shape in cross-section by pressing a metal plate or the like, and are disposed facing each other in the left-right direction. The lower side frame 22 is joined to the lower part of the main side frame 21 by welding while being held by the lower part of the main side frame 21 at the upper part.

  Specifically, the lower side frame 22 is formed so that the width in the front-rear direction is the same as the lower part of the main side frame 21. In other words, the lower side frame 22 is formed wider in the front-rear direction than the narrow upper portion of the main side frame 21.

  The lower frame 30 includes a connection pipe 31 that connects the left and right lower side frames 22 and a connection beam 32. Specifically, the connection pipe 31 connects the side wall 22a corresponding to the bottom of the lower side frame 22 having a substantially U shape in cross section, and the connection beam 32 extends from the rear end and the lower end of the side wall 22a of the lower side frame 22 in the left-right direction. The flange portion 22b extending inward is connected.

  As shown in FIG. 3A, the seat back pad P is a member that supports the back of the occupant, and is supported by the seat back frame F2 by covering the seat back frame F2 from the front side. Specifically, the seat back pad P includes a front wall portion P1 that supports the back of the occupant, an upper wall portion P2 that protrudes rearward from the upper end portion of the front wall portion P1, and left and right end portions of the front wall portion P1. The left and right side wall portions P3 project rearward.

  At the rear part of the side wall part P3, a step part P6, a side part constituting part P31, and a protruding part P32 are provided. The stepped portion P6 is provided on the upper side of the rear portion of the left and right side wall portions P3. As shown in FIGS. 3B and 3C, the inner side portion P61 on the inner side in the left-right direction is more than the outer side portion P62 on the outer side in the left-right direction. Also, the height is reduced. The inner part P61 is provided so as to correspond to a range in which a rod-shaped member 60 (see FIG. 6) described later is provided.

  As shown in FIG. 4, the stepped portion P6 is formed in a shape that matches the upper portions of the left and right end edges of the backboard 50 disposed on the rear side of the seat back frame F2. Specifically, the stepped portion P6 of the seat back pad P has a shape that matches the upper portions of the left and right edges of the backboard 50 with the skin member E sandwiched between the backboard 50 and the stepped portion P6.

  Thereby, for example, as shown in FIG. 5A, the rear surface of the seat back pad P (specifically, the skin member E) and the rear surface of the back board 50 are substantially flush with each other as compared with a structure in which the step portion P6 is not provided. Therefore, the appearance can be improved.

  Returning to FIG. 3 (a), the side portion constituting portion P31 is a portion that is compressed to be larger than the other portions by the skin member E and the backboard 50 as an example of a compression member to be described later, and below the step portion P6. Arranged on the side. As shown in FIGS. 3B and 3C, the side part P31 is formed to be higher than the inner part P61 of the step part P6, and the rear surface of the inner part P61 and the rear face of the side part P31. Are connected by a gentle inclined surface P63.

  Thereby, when the lower part of the backboard 50 is pushed forward to compress the side part constituent part P31, it is possible to suppress the formation of a space near the boundary between the inner part P61 and the side part constituent part P31. It is possible to compress the component P31 evenly by applying an even force to the component P31.

  As shown to Fig.3 (a), the protrusion part P32 is arrange | positioned under the side part structure part P31, and is formed so that it may protrude in the left-right direction inner side from the side wall part P3. Moreover, a hole P33 penetrating right and left is formed in the right side wall portion P3.

  As shown in FIGS. 5A and 5B, an outer skin member E is covered on the outside of the seat back pad P configured as described above. Further, after the skin member E turns from the front side to the rear side of the seat back pad P, it is fixed to the seat back frame F2 by a hook FK provided at the end thereof.

  And when attaching the skin member E in this way, as shown by a phantom line in FIG. 5B, the side portion P31 is formed with a larger amount of protrusion to the side frame 20 than the other part. Therefore, the side part P31 is largely compressed by the skin member E. Thereby, since the side part component P31 is compressed and hardened by the skin member E, it is possible to prevent the seat back pad P from wobbling left and right.

  Moreover, in this embodiment, when attaching the backboard 50 from the rear side to the seatback frame F2 after the attachment of the skin member E, the side part P31 is further compressed by the left and right ends of the backboard 50. It has come to be. Thus, by compressing the side part P31 with both the skin member E and the backboard 50, the amount of compression of the side part P31 can be increased, so that the side part P31 is made harder. Is possible.

  The compression amount of the side part P31 by the skin member E and the backboard 50 is preferably 40 mm or more. In this way, by setting the compression amount of the side part constituent part P31 to 40 mm or more, the side part constituent part P31 can be securely hardened, and the wobbling of the seat back pad P can be satisfactorily suppressed.

  In addition, as described above, the side part P31 is compressed by the skin member E and then compressed by the backboard 50, so that the side part P31 is crushed when the backboard 50 is attached. Since the amount can be reduced, the attachment work of the backboard 50 can be facilitated.

  The side part P31 is supported from the inner side in the left-right direction by the lower side frame 22 formed wider than the upper part of the main side frame 21. Thereby, since the side part component part P31 can be stably supported by the wide lower side frame 22, the wobbling of the seat back pad P can be further suppressed.

  The backboard 50 is disposed so that a gap is left between the left and right ends thereof and the side frame 20. And the side part structure part P31 is arrange | positioned so that the clearance gap between the left-right edge part of the backboard 50 and the side frame 20 may be block | closed.

  Thus, by closing the gap with the side part P31 that has become harder due to compression, it is possible to prevent objects from entering the gap, so the left and right ends of the backboard 50 and the side frame 20 It is possible to prevent the backboard 50 from being removed due to an object entering between the two.

  In particular, in the present embodiment, a side part P31 is disposed in a part of the lower side between the left and right ends of the backboard 50 and the side frame 20 (gap), and the side part P31 Further, as shown in FIGS. 5A and 6, a bar-like member 60 for supporting the seat back pad P from the inside is disposed in the upper portion. Thereby, since it is sufficient to arrange the side part P31 that is a part to be largely compressed only in a part of the gap, for example, the skin member E and the backboard as compared with the structure in which the side part is arranged substantially over the gap. The reaction force from the side component P31 can be reduced when 50 is attached, and the attachment work of the backboard 50 can be facilitated.

  Specifically, the rod-shaped member 60 includes a main body portion 61 formed in an elongated shape along the side frame 20, a first extending portion 62 extending obliquely upward from the lower end portion of the main body portion 61, It has the 2nd extension part 63 extended toward the front substantially from the front end of the 1 extension part 62. As shown in FIG. And the upper end part of the main-body part 61 is joined by welding to the switch bracket SB joined to the upper end part of the main side frame 21 by welding.

  Specifically, the switch bracket SB is welded to the upper end of the main side frame 21 at two upper and lower welding points W1 and W2, and the upper end of the main body 61 is welded between the two welding points W1 and W2. It is welded to the switch bracket SB at a point W3. This makes it possible to improve the mounting rigidity of the switch bracket SB. Here, the switch bracket SB is a bracket for attaching a switch for reclining and sliding the vehicle seat S.

  An end portion of the second extending portion 63 is joined to the lower side of the main side frame 21 by welding. Specifically, the welding point W4 (fixed location) of the second extending portion 63 is provided above the three welding points W5 (fixed location) of the main side frame 21 with respect to the lower side frame 22.

  Thereby, when the main side frame 21 and the lower side frame 22 are joined by welding, it is possible to prevent the bar-shaped member 60 from interfering. Moreover, since the 1st extension part 62 is extended in the back diagonally downward rather than the welding point W4, the up-and-down length of the main-body part 61 can be enlarged, and it is arrange | positioned to the lower part of the main-body part 61 by that much. It is possible to reduce the repulsive force at the time of attaching the skin member E etc. by reducing the size of the side part P31.

  As shown in FIG. 7, the backboard 50 includes a resin outer board 51, a pocket member 52 made of synthetic leather or fabric, and a resin inner board 53.

  The outer board 51 is formed in a substantially rectangular frame shape, and a plurality of welding bosses 51a protruding forward are provided on the front surface of the outer board 51 so as to surround the opening 51b. The outer board 51 is melted by inserting each welding boss 51a into a plurality of welding holes 53a provided in the inner board 53 while sandwiching the pocket member 52 between the outer board 51 and the inner board 53. The pocket member 52 is held between the inner board 53 and the inner board 53.

  In addition, a pair of hook-like left and right claw portions 51d that protrude toward the front and then protrude toward the inner side in the left-right direction are provided at the lower front portion of the outer board 51 so as to be separated from each other in the left-right direction. Each claw portion 51d is a claw that engages with a pair of left and right engagement holes 53d provided in the lower portion of the inner board 53, whereby the outer board 51 and the inner board 53 can be temporarily assembled. .

  In addition, a pair of left and right hook-shaped portions 51 c that protrude forward and bend upward are formed on the upper front surface of the outer board 51. Each hook-like portion 51c is arranged above the inner board 53 in a state after the welding of the outer board 51 and the inner board 53 is completed, and when the back board 50 is attached to the seat back frame F2. Further, it engages with the rigid wire 42 shown in FIG. 2 from below.

  As a result, the approximate vertical position of the outer board 51 can be determined, and the upper part of the outer board 51 can be prevented from falling backward.

  The pocket member 52 is a member that forms a pocket portion 52a for accommodating an object by superimposing a plurality of skin materials made of synthetic leather, fabric or the like, and the entrance portion 52b of the pocket portion 52a is formed of the pocket portion 52a. In order to improve usability, a plate-like member is provided between the overlapping skin materials. Therefore, the inlet portion 52 b is a thickest portion of the pocket member 52 that is the thickest.

  The inner board 53 is formed in a substantially rectangular frame shape, and a plurality of welding holes 53a corresponding to the plurality of welding bosses 51a of the outer board 51 are provided so as to surround the opening 53b. . Specifically, the plurality of welding holes 53a are arranged at positions along the outer peripheral edge of the main body 53c formed in a frame shape (positions inside the protruding pieces 53e described later).

  The pair of engaging holes 53d described above is formed in the lower portion of the inner board 53, and the lower side of the pair of engaging holes 53d is the seat back frame F2 as shown in FIGS. By being engaged with the connection beam 32, a temporary fixing portion 71 held by the connection beam 32 and a fixing portion 72 fixed to the connection beam 32 are provided one by one on the left and right. The left temporary fixing portion 71 is disposed adjacent to the left fixing portion 72 on the left and right, and the right temporary fixing portion 71 is disposed adjacent to the right fixing portion 72 on the left and right.

  Since the temporary fixing portion 71 and the fixing portion 72 are adjacent to each other in this manner, the temporary fixing portion 71 is not easily affected by manufacturing errors, so that the temporary fixing portion 71 is engaged with an engagement portion (a temporary fixing hole 32a described later) of the connecting beam 32. After this, even if the fixing portion 72 and a fixing portion (fixing hole 32b to be described later) are shifted due to a manufacturing error, the shift amount is extremely small. Therefore, it is possible to facilitate the operation of positioning the fixing portion 72 at the fixing location.

  Further, by making the temporary fixing portion 71 and the fixing portion 72 adjacent to each other on the left and right, for example, the vertical dimension of the backboard 50 and the connecting beam 32 can be shortened as compared with a structure in which the temporary fixing portion and the fixing portion are adjacent to each other vertically. It is possible to reduce the size and weight.

  If the layout of the left and right temporary fixing portions 71 and the fixing portion 72 described above is expressed in another expression, a pair of the temporary fixing portions 71 and the fixing portions 72 adjacent to the left and right are provided separately from each other in the left and right directions. ing. And in each set, the fixing | fixed part 72 is arrange | positioned rather than the adjacent temporary fix | stop part 71 at the left-right direction.

  Accordingly, for example, the distance between the left and right end portions of the backboard 50 and the fixing portion 72 can be shortened as compared with a structure in which the fixing portion is disposed on the inner side in the left-right direction with respect to the temporary fixing portion. When the left and right end portions of the backboard 50 are pulled, the moment applied to the fixing portion 72 can be reduced, and the mounting rigidity between the backboard 50 and the connecting beam 32 can be increased.

  Specifically, the temporary fixing portion 71 includes a base portion 71a that protrudes forward from the backboard 50, and an engagement portion 71b that protrudes forward from the base portion 71a and engages with the temporary fixing hole 32a of the connection beam 32. doing. The base 71a is formed in a bottomed cylindrical shape that opens toward the side opposite to the adjacent fixing portion 72, that is, inward in the left-right direction.

  Thus, by forming the base 71a in a bottomed cylindrical shape (hollow shape), for example, the weight of the backboard 50 can be reduced as compared with a structure in which the base is formed in a solid shape. In addition, since the opening of the bottomed cylindrical base 71a is directed to the side opposite to the fixed portion 72, the wall 71c corresponding to the bottom of the bottomed cylindrical base 71a is adjacent to the fixed portion 72. It is possible to increase the rigidity.

  The engaging portion 71b is formed in a hook shape that protrudes forward and then protrudes downward, and is formed so that the width in the left-right direction at the tip thereof is smaller than the width in the left-right direction of the temporary fixing hole 32a. ing.

  The fixing portion 72 is formed so as to protrude forward from the backboard 50 and is formed in a bottomed cylindrical shape that opens rearward. The fixing portion 72 is formed so as to be gradually tapered toward the front, whereby the rigidity of the fixing portion 72 itself can be increased.

  A through hole 72b through which a screw SC for fixing the fixing portion 72 to the connecting beam 32 is inserted is formed in the wall 72a corresponding to the bottom of the bottomed cylindrical fixing portion 72. The through hole 72b formed in the right fixing portion 72 is formed as a long hole extending in the vertical direction, and the through hole 72b formed in the left fixing portion 72 is formed as a long hole extending in the left and right direction. As a result, the thermal expansion of the resin backboard 50 in the vertical and horizontal directions can be absorbed by the through holes 72b.

  As shown in FIG. 9A, the connecting beam 32 has a pair of left and right temporary fixing holes 32a with which the tips of the engaging portions 71b of the pair of left and right temporary fixing portions 71 are engaged, and a pair of left and right temporary fixings. A pair of left and right fixing holes 32b are formed outside the hole 32a in the left-right direction. A first inclined surface 32c for guiding the tip of the engaging portion 71b of the temporary fixing portion 71 from below to the temporary fixing hole 32a is provided below the temporary fixing hole 32a.

  As a result, the front end of the engaging portion 71b of the temporary fixing portion 71 can be guided to the temporary fixing hole 32a by the first inclined surface 32c in the vertical direction, so that the mounting work of the backboard 50 can be facilitated. It has become.

  A pair of second inclined surfaces 32d are provided on the left and right sides of the first inclined surface 32c to guide the tip of the engaging portion 71b of the temporary fixing portion 71 inward in the left-right direction. Thereby, since the engaging part 71b of the temporary fix | stop part 71 can be guided toward the 1st inclined surface 32c, it is possible to make the attachment operation | work of a backboard easy.

  The first inclined surface 32c and the second inclined surfaces 32d on the left and right sides of the first inclined surface 32c are integrally formed as a recess, and an upper edge portion that forms the lower edge of the temporary fixing hole 32a in the recess. The tip of the engaging portion 71b of the temporary fixing portion 71 is engaged with 32e. Thus, by forming the 1st inclined surface 32c and the 2nd inclined surface 32d integrally as a recessed part, the front-end | tip of the engaging part 71b of the temporary fix | stop part 71 to the upper edge part 32e of the recessed part where rigidity became high by the recessed shape Is engaged, so that the backboard 50 can be temporarily fixed.

  The temporary fixing hole 32a is provided at a position that does not overlap the wire 41 that supports the occupant when viewed from the rear side. Thereby, it is possible to prevent the front end of the engaging portion 71b from interfering with the wire 41 when the front end of the engaging portion 71b of the temporary fixing portion 71 is engaged with the temporary fixing hole 32a.

  Returning to FIG. 7, a protruding piece 53 e that protrudes outward from the outer peripheral edge of the main body portion 53 c is formed at a substantially central portion of the left and right side portions of the main body portion 53 c of the inner board 53. In the vicinity of the left and right protruding pieces 53e, as shown in FIGS. 10 and 11, a plate that engages with a U-shaped engagement fitting 90 (see FIG. 11A) provided on the main side frame 21 in a side view. One hook 80 is provided.

  Here, the engagement metal fitting 90 has a shape in which both ends of a cylindrical bar-like member are bent in a U shape when viewed from the side, and then each end is bent inward in the left-right direction. Specifically, the engagement metal fitting 90 includes a first rod-shaped portion 91 extending in the vertical direction, a second rod-shaped portion 92 extending forward from the upper and lower end portions of the first rod-shaped portion 91, and the second rod-shaped portions 92. It has the 3rd rod-shaped part 93 (refer FIG.11 (b)) extended in the left-right direction inner side.

  The plate-like hooks 80 protrude from the backboard 50 toward the front, and the second plate 80 protrudes forward from the backboard 50 and faces the first plate-like portion 81 in the left-right direction. It has the plate-shaped part 82 and is comprised.

  A first engagement portion 81 a that protrudes from the portion toward the second plate-shaped portion 82 at the upper portion of the front end portion of the inner surface (the surface on the second plate-shaped portion 82 side) of the first plate-shaped portion 81. Is formed. In addition, a second portion that protrudes from the portion toward the first plate-like portion 81 at the lower portion of the tip portion of the inner surface of the second plate-like portion 82 (the surface on the first plate-like portion 81 side). A joint portion 82a is formed.

  In a state where the plate-like hook 80 is engaged with the engagement fitting 90, the first rod-like portion 91 of the engagement fitting 90 is sandwiched between the first plate-like portion 81 and the second plate-like portion 82. The first engaging portion 81a and the second engaging portion 82a are engaged with the first rod-shaped portion 91 from the front side. That is, by forming the plate-like portions 81 and 82 wider in the vertical direction than the engagement portions 81a and 82a, the rigidity of the plate-like portions 81 and 82 can be increased. 81a and 82a and the 1st rod-shaped part 91 can be engaged more firmly.

  Further, the first plate-like portion 81 (a part of the plate-like hook 80) is disposed on a protruding piece 53e that protrudes outward from the outer peripheral edge of the main body portion 53c of the inner board 53. Thus, for example, the distance between the left and right end portions of the backboard 50 and the plate-like hook 80 can be shortened as compared with a structure in which all of the plate-like hooks 80 are arranged in the main body 53c. When the end is pulled, the moment applied to the plate-like hook 80 can be reduced, and the plate-like hook 80 can be made difficult to come off from the engagement fitting 90.

  In addition, the protruding piece 53e is formed only at a position where the plate-like hook 80 is disposed, and the other outer peripheral edge (the outer peripheral edge of the main body portion 53c) is formed to be inside the protruding piece 53e. Compared to the structure in which the outer peripheral edge of the main body 53c is extended to the same position as the outer peripheral edge of the protruding piece 53e, it is possible to reduce the weight of the inner board 53.

  Further, as shown in FIG. 11C, the upper and lower surfaces 81b and 82b of the engaging portions 81a and 82a are inclined so as to be located on the inner side in the vertical direction as they go inward in the left and right direction. Yes. As a result, when the plate-like hook 80 is moved in the vertical direction, the inclined surfaces 81b, 82b are brought into contact with the second rod-like portion 92 so that the plate-like portions 81, 82 are spread out. It is possible to easily remove the joint portions 81a and 82a from the second rod-shaped portion 92.

  Specifically, for example, when the plate-like hook 80 is moved downward, the inclined surface 82b of the second engaging portion 82a comes into contact with the lower second rod-like portion 92 and the second plate-like portion. 82 is pushed to the right. Thereafter, the surface 81d perpendicular to the top and bottom of the first engaging portion 81a abuts on the second rod-shaped portion 92 and the movement of the plate-like hook 80 is stopped, but the movement direction of the plate-like hook 80 is changed to the diagonally lower left. Thus, the second plate-like portion 82 can be further expanded to the right side to disengage the engaging portions 81a, 82a from the second rod-like portion 92.

  As shown in FIG. 10, two ribs (protrusions) 81 c and 82 c are provided on the outer surfaces of the first plate-like portion 81 and the second plate-like portion 82 in the left-right direction. Thereby, the rigidity of each plate-like part 81 and 82 can be made higher.

  In particular, in the present embodiment, the first plate-like portion 81 and the second plate-like portion 82 are provided on the bottom surface of the concave portion 53f formed so as to straddle the main body portion 53c and the protruding piece 53e of the backboard 50. Yes. Thus, a left wall 53g that protrudes forward from the bottom surface of the recess 53f is formed on the left side of the rib 81c (the side opposite to the first plate-like portion 81), and the right side of the rib 82c (with the second plate-like portion 82). On the opposite side, a right wall 53h that protrudes forward from the bottom surface of the recess 53f is formed.

  And the rib 81c of the 1st plate-shaped part 81 is formed so that the surface of the left-right direction outer side of the 1st plate-shaped part 81, the bottom face of the recessed part 53f, and the left wall 53g may be connected. Further, the rib 82c of the second plate-like portion 82 is configured to connect the outer surface in the left-right direction of the second plate-like portion 82, the bottom surface of the recess 53f, and the right wall 53h.

  Thereby, the rigidity of each plate-shaped part 81,82 can be made higher compared with the case where a rib cannot be connected with the bottom face of a recessed part, or a right-and-left wall, for example.

  Further, a substantially rectangular hole 53j that is long in the vertical direction is formed between the plate-like portions 81 and 82 of the backboard 50. The hole 53j is formed so that the left and right widths are substantially the same as the interval between the plate-like portions 81 and 82, and the vertical length is slightly larger than the vertical length of the plate-like portions 81 and 82. Is formed. Thereby, it is possible to reduce the weight of the backboard 50.

  Each plate-like portion 81, 82 is provided between two adjacent fixing points (a welding boss 51a and a welding hole 53a). In this way, by providing the plate-like portions 81 and 82 at a portion having high rigidity between two adjacent fixing points, the rigidity of the plate-like portions 81 and 82 can be further increased.

  Further, at least one of the two fixing points adjacent to each other with the plate-like portions 81 and 82 described above interposed therebetween is disposed in the vicinity of the thick pocket portion 52a of the pocket member 52 shown in FIG. Thus, by disposing at least one of the two fixing points adjacent to each other with the plate-like portions 81 and 82 interposed therebetween in the vicinity of the pocket portion 52a of the pocket member 52, the meat of the pocket member 52 is fixed at the fixing point. Since the thick pocket portion 52a can be strongly pressed, the pocket member 52 and the outer board 51 can be substantially flush with each other.

  Although the embodiments of the present invention have been described above, the present invention can be implemented with appropriate modifications as shown in other embodiments below.

  In the said embodiment, although the temporary fix | stop part 71 and the fixing | fixed part 72 were adjoined right and left, this invention is not limited to this, You may adjoin any direction.

  In the above embodiment, the fixing portion 72 is disposed on the outer side in the left-right direction than the temporary fixing portion 71. However, the present invention is not limited to this, and conversely, the fixing portion is positioned on the inner side in the left-right direction with respect to the temporary fixing portion. You may arrange. Moreover, the shape and arrangement | positioning of a fixing | fixed part and a temporary fix | stop part are not limited to the said embodiment, It can change suitably.

  In the said embodiment, although the vehicle seat S used by a motor vehicle was illustrated as a vehicle seat, this invention is not limited to this, For example, the sheet | seat used for a ship, an aircraft, etc. It can also be applied to.

50 Backboard 53 Innerboard 71 Temporary fixing portion 72 Fixed portion F2 Seat back frame 32 Connecting beam S Vehicle seat

Claims (9)

A vehicle seat having a seat back frame and a back board provided on the rear side of the seat back frame,
The backboard includes
A fixing portion fixed to the seat back frame;
By being engaged with the seat back frame, a temporary fixing portion held by the seat back frame is provided,
The vehicle seat, wherein the fixing portion and the temporary fixing portion are adjacent to each other.   The vehicle seat according to claim 1, wherein the fixing portion and the temporary fixing portion are provided adjacent to each other in the left and right in a lower portion of the backboard. The set of the fixing portion and the temporary fixing portion is provided on each of the left and right of the lower portion of the backboard,
The vehicle seat according to claim 1, wherein the fixing portion is disposed on an outer side in the left-right direction with respect to the temporary fixing portion. In the seat back frame,
A hole with which the tip of the temporary fixing portion is engaged;
The 1st inclined surface which is arrange | positioned under the said hole and guides the front-end | tip of the said temporary fix | stop part upward from the bottom toward the said hole is provided. The vehicle seat according to any one of the above.   5. The vehicle seat according to claim 4, wherein a pair of second inclined surfaces are provided on the left and right sides of the first inclined surface to guide the front end of the temporary fixing portion inward in the left-right direction. . The first inclined surface and the second inclined surface are integrally formed as a recess,
The vehicle seat according to claim 5, wherein a tip end of the temporary fixing portion is engaged with an upper edge portion that forms a lower edge of the hole in the concave portion.   The vehicle seat according to claim 6, wherein a width of a tip end of the temporary fixing portion in a left-right direction is smaller than a width of the hole in a left-right direction. The seat back frame has a wire for supporting an occupant,
The vehicle seat according to any one of claims 4 to 7, wherein the hole is provided at a position that does not overlap the wire when viewed from the rear side. The temporary fixing portion is
A base that protrudes forward from the backboard; and an engagement portion that protrudes forward from the base and engages the seatback frame;
The vehicle seat according to any one of claims 1 to 8, wherein the base portion is formed in a bottomed cylindrical shape that opens toward a side opposite to the fixing portion.

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