Abstract:
There is provided a vehicle seat including: a framework member that structures a framework of a seatback; a center rear face cover that structures a central portion of a rear face of the seatback; a side rear face cover that structures the seat width direction side portion; an overlap portion at which an end portion of the center rear face cover and an end portion of the side rear face cover are sewn together in an overlapping state, and extending to a seat forward side; an anchor member that is disposed at the overlap portion and that is anchored at the framework member and pulls the overlap portion in to the seat forward side; and a restraining portion that joins at least one of the overlap portion and the anchor member to the framework member, and restrains movement of the overlap portion.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2012-070040 filed on Mar. 26, 2012, the disclosure of which is incorporated by reference herein. 
     BACKGROUND 
     1. Technical Field 
     The present invention relates to a seat to be used in a vehicle. 
     2. Related Art 
     In a vehicle seat, a rear face of a seatback is curved so as to be hollowed to a seatback inner side (a forward side), and the appearance of the seatback is improved. In addition, the thickness of the seatback is reduced and legroom for a rear seat is increased (for example, see Japanese Patent No. 3,838,495). 
     This vehicle seat includes a rear back cover portion, which structures a central portion of the rear face of the seatback, and framework cover portions, which structure two seat width direction sides of the rear face of the seatback. Joining strips are sewn to seam portions between the rear back cover portion and the framework cover portions, and a vertical core is attached to a distal end portion of each joining strip. A longitudinal direction middle portion of each vertical core is joined to a seatback frame. Thus, the vertical cores are curved so as to project to the seat forward side, and the rear back cover portion and framework cover portions are curved to the seat forward side. 
     However, in the vehicle seat described above, the pair of vertical cores are anchored at a horizontal joining pole, and the horizontal joining pole is anchored to frame wires of the seatback frame by tying members. Therefore, the number of components is large. Accordingly, anchoring the vertical cores to the seatback frame without using the horizontal joining pole has been considered. In this case, preparing a structure that may suppress detachment of the vertical cores from the seatback frame is desirable. 
     SUMMARY 
     In consideration of the situation described above, an object of the present invention is to provide a vehicle seat in which the appearance of a seatback may be improved and a thickness of the seatback may be reduced, while detachment of anchor members from framework members is suppressed. 
     A first aspect of the present invention provides a vehicle seat including: 
     a framework member that structures a framework of a seatback; 
     a center rear face cover that structures a central portion of a rear face of the seatback; 
     at each of two seat width direction side portions of the rear face of the seatback, a side rear face cover that adjoins the center rear face cover and structures the seat width direction side portion; 
     an overlap portion at which an end portion of the center rear face cover and an end portion of the side rear face cover are sewn together in an overlapping state, the overlap portion extending to a seat forward side from the center rear face cover and the side rear face cover in plan view; 
     an anchor member that is disposed at the overlap portion and that is anchored at the framework member and pulls the overlap portion in to the seat forward side; and 
     a restraining portion that joins at least one of the overlap portion and the anchor member to the framework member, and restrains movement of the overlap portion. 
     In the vehicle seat according to the first aspect of the present invention, the central portion of the rear face of the seatback is structured by the center rear face cover, and the side rear face covers are disposed at the two seat width direction sides of the center rear face cover. Each region at which an end portion of the center rear face cover overlaps with an end portion of a side rear face cover serves as the overlap portion. In plan view, these overlap portions extend to the seat forward side from the center rear face cover and the side rear face covers. 
     The anchor member is provided at each overlap portion, and the overlap portion is pulled in to the seat forward side by the anchor member being anchored at the framework member of the seatback. Therefore, if the anchor member is structured as, for example, a “J-hook” that is formed in a “J” shape in cross section and the anchor member extends in the seat up-and-down direction along the overlap portion, the whole of the anchor member and the whole of the overlap portion are pulled in to the seat forward side. As a result, the appearance of the seatback may be improved and the thickness of the seatback may be reduced. 
     At least one of the overlap portion and the anchor member is joined to the framework member by the restraining portion. Thus, movements of the overlap portion are restrained by the restraining portion. Therefore, even if the overlap portion acts to move due to, for example, a tension force acting on the center rear face cover and the side rear face cover, movement of the overlap portion is restrained by the restraining portion, and hence movement of the anchor member is restrained. Therefore, detachment of the anchor member from the framework member may be suppressed. 
     A second aspect of the present invention provides the vehicle seat according to the first aspect, wherein the restraining portion includes: 
     a joining member to which at least one of the overlap portion and the anchor member is sewn, the joining member being disposed along the framework member; and 
     a fixing member that fixes the joining member to the framework member. 
     In the vehicle seat according to the second aspect of the present invention, the joining member to which at least one of the overlap portion and the anchor member is sewn is arranged along the framework member, and the joining member is fixed to the framework member by the fixing member. Accordingly, after the anchor member is anchored at the framework member, the joining member is fixed to the framework member along the framework member. Thus, relative movement of the joining member with respect to the framework member may be restrained. Therefore, detachment of the anchor member from the framework member may be effectively suppressed. 
     A third aspect of the present invention provides the vehicle seat according to the second aspect, wherein the joining member is sewn to both the anchor member and the overlap portion. 
     In the vehicle seat according to the third aspect of the present invention, the joining member is sewn to both the overlap portion and the anchor member. Therefore, regions of sewing of the joining member and the anchor member to the overlap portion may be set to one location. In addition, because movement of the anchor member is restrained by the joining member directly, detachment of the anchor member from the framework member may be even more effectively suppressed. 
     A fourth aspect of the present invention provides the vehicle seat according to the first aspect, wherein: 
     the anchor member includes a hook portion that is open to the seat rear side in a state in which the anchor member is anchored at the framework member, and 
     the framework member includes a flange portion at which the hook portion is anchored, the flange portion being angled in plan view to a seat width direction inner side toward the seat forward side. 
     In the vehicle seat according to the fourth aspect of the present invention, in the state in which the anchor member is anchored at the flange portion, the hook portion of the anchor member is open to the seat rear side, and in plan view, the flange portion is angled to the seat width direction inner side toward the seat forward side. Therefore, the anchor member may be anchored at the flange portion from the seat rear side more easily than in a case in which the flange portion is inflected to the seat forward side from the framework member. Thus, characteristics of assembly when the anchor member is being anchored at the framework member may be improved. 
     A fifth aspect of the present invention provides the vehicle seat according to the first aspect, further including, at each of two seat width direction side faces of the seatback, a fastener that detachably joins a side face cover structuring the seat width direction side face to the side rear face cover. 
     In the vehicle seat according to the fifth aspect of the present invention, the side face cover and the side rear face cover are joined together by the fastener. Therefore, the side face cover and side rear face cover may be joined together by the fastener after the anchor member has been anchored at the framework member. Moreover, even if a tension force acts on the side rear face cover when the side face cover and side rear face cover are being joined together by the fastener, detachment of the anchor member from the framework member may be suppressed by the restraining portion. Therefore, characteristics of assembly when the anchor member is being anchored at the framework member may be improved. 
     According to a vehicle seat in accordance with the first aspect of the present invention, the appearance of the seatback may be improved and a thickness of the seatback may be reduced, while detachment of the anchor members from the framework members is suppressed. 
     According to a vehicle seat in accordance with the second aspect of the present invention, detachment of the anchor members from the framework members may be effectively suppressed. 
     According to a vehicle seat in accordance with the third aspect of the present invention, detachment of the anchor members from the framework members may be even more effectively suppressed. 
     According to a vehicle seat in accordance with the fourth aspect of the present invention, assembly characteristics when the anchor members are being anchored at the framework members may be improved. 
     According to a vehicle seat in accordance with the fifth aspect of the present invention, assembly characteristics when the anchor members are being anchored at the framework members may be improved. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Exemplary embodiments of the present invention will be described in detail based on the following figures, wherein: 
         FIG. 1  is a magnified plan sectional diagram (a sectional diagram taken along line  1 - 1  in  FIG. 2 ) showing principal portions of a vehicle seat in accordance with an exemplary embodiment of the present invention; 
         FIG. 2  is a perspective diagram, viewed from diagonally rearward of the seat, showing the vehicle seat in accordance with the exemplary embodiment of the present invention; 
         FIG. 3  is a perspective diagram showing a side frame that is shown in  FIG. 1 ; and 
         FIG. 4  is a magnified plan sectional diagram showing principal portions of a vehicle seat in accordance with a variant example of the exemplary embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 2  shows a perspective diagram in which a vehicle seat  10  in accordance with an exemplary embodiment of the present invention is viewed from diagonally rearward of the seat. The arrow FR, which is shown as appropriate in the drawings, indicates forward of the seat, an arrow RH indicates rightward of the seat (one seat width direction side), and an arrow UP indicates upward of the seat. The vehicle seat  10  is disposed in a condition in which a seat front-and-rear direction matches a vehicle front-and-rear direction and a seat width direction matches a vehicle width direction. 
     As shown in this drawing, the vehicle seat  10  is equipped with a seat cushion  12 , on which an occupant sits, and a seatback  14 , which supports a back area of the occupant. The seatback  14  is disposed in a condition of being stood up from a seat rearward end portion of the seat cushion  12 . 
     As shown in  FIG. 1 , the seatback  14  includes a seatback frame  16 , a back pad  26  (broadly speaking, an element that may be understood as being a pad), and a trim cover  32 . The seatback frame  16  serves as a framework member structuring a framework of the seatback  14 , and the trim cover  32  structures an outer periphery portion of the seatback  14 . The respective structures described below are structured with left-and-right symmetry in the seat width direction. Accordingly, a seat right side region of the seatback  14  is described and no description is given of a seat left side region of the seatback  14 . 
     The seatback frame  16  includes a side frame  18  disposed at a seat right side portion of the seatback  14 . The side frame  18  is fabricated of a metal plate, and extends in the seat up-and-down direction with the plate thickness direction along the seat width direction. A lower end portion of the side frame  18  is joined, by a conventional widely known recliner mechanism, to a cushion frame (not shown in the drawings) that structures a framework member of the seat cushion  12 . An upper end portion of the side frame  18  is joined to a pipe-shaped upper frame (not shown in the drawings) structuring a portion of the seatback frame  16 . 
     The side frame  18  is formed in a substantial “W” shape that is open to the seat left side in plan sectional view. A rear end wall  20  of the side frame  18  extends in the seat width direction in plan sectional view, and is curved so as to project to the seat forward side in side view (see  FIG. 3 ). A pair of fixing holes  22  are formed penetrating through the rear end wall  20  for the fixing of clips  58 , which are described below. The pair of fixing holes  22  are formed in circular shapes and are disposed to be spaced apart in the seat up-and-down direction (see  FIG. 3 ). A flange portion  24  is formed at a distal end portion (a seat left side end portion) of the rear end wall  20 . The flange portion  24  is disposed to be angled to the seat left side (a seat width direction inner side) toward the seat forward side in plan sectional view, and extends in the seat up-and-down direction along the side frame  18 . 
     The back pad  26  is formed of a foam member of urethane or the like. The back pad  26  is formed in a substantial “C” shape that is open to the seat rear side in plan sectional view, and is supported by the seatback frame  16 . Accordingly, a recess portion  28 , in which the back pad  26  is not disposed, is formed at a seat rear side portion of the seatback  14 . A corner portion  30  at the seat rear side of the back pad  26  is formed in a substantially circular arc shape in plan view. 
     The trim cover  32  is fabricated of a cloth material and is formed overall in a bag shape that is open to downward of the seat. The trim cover  32  includes a side trim cover portion  34 , a first rear trim cover portion  36  and a second rear trim cover portion  40 . The side trim cover portion  34  serves as a side face cover, which structures a seat right side face of the seatback  14 . The first rear trim cover portion  36  serves as a side rear face cover, which structures a seat right side portion (seat width direction outer side portion) of the rear face of the seatback  14 . The second rear trim cover portion  40  serves as a center rear face cover, which structures a middle portion of the rear face of the seatback  14 . The trim cover  32  is further provided with a J-hook  46 , which serves as an anchor member, and a restraining portion  52 . 
     The side trim cover portion  34  is disposed at the seat right side (the seat width direction outer side) of the back pad  26  and covers the back pad  26 . A seat rear end portion of the side trim cover portion  34  is disposed at a middle portion of the corner portion  30  of the back pad  26 . The corner portion  30  is formed in a circular arc shape. 
     The first rear trim cover portion  36  is inflected in a substantial “L” shape in plan sectional view, and is disposed at the seat left side of the seat rear end portion of the side trim cover portion  34 . A seat right end portion of the first rear trim cover portion  36  is detachably joined to the seat rear side end portion of the side trim cover portion  34  by a fastener  38 . The first rear trim cover portion  36  is curved round to the seat forward side substantially at the seat rear side of the flange portion  24  of the side frame  18 . Thus, a seat left side end portion of the first rear trim cover portion  36  extends to the seat forward side from the first rear trim cover portion  36 . 
     The second rear trim cover portion  40  is formed in a substantial “U” shape that is open to the seat forward side in plan sectional view, and is disposed at the seat left side and seat forward side of the first rear trim cover portion  36 . A seat rightward half of the second rear trim cover portion  40  is shown in  FIG. 1 . A seat right side region of the second rear trim cover portion  40  is inflected to the seat forward side so as to oppose the seat left side end portion of the first rear trim cover portion  36 , and a seat right side end portion of the second rear trim cover portion  40  extends to the seat forward side from the second rear trim cover portion  40 . A region at which the first rear trim cover portion  36  and the second rear trim cover portion  40  overlap serves as an overlap portion  42 . The overlap portion  42  is sewn together at the region of a first seam portion  44 . 
     The J-hook  46  is fabricated of resin, and is formed in a substantial “J” shape that is open to the seat rear side in plan sectional view. The J-hook  46  is disposed at the seat right side of a distal end portion (a seat forward side end portion) of the overlap portion  42 , and the J-hook  46  extends in the seat up-and-down direction along the distal end portion of the overlap portion  42 . At the region of a second seam portion  48 , a proximal end portion of the J-hook  46  is sewn to a joining trim cover  54 , which is described below, and to the distal end portion of the overlap portion  42 . The J-hook  46  includes a hook portion  50 , which is provided extending to the seat forward side from the proximal end portion of the J-hook  46 . The hook portion  50  is formed in a substantial “U” shape in cross section, and is anchored at the flange portion  24  of the side frame  18 . Consequently, the first rear trim cover portion  36  and the second rear trim cover portion  40  are pulled in to the seat forward side by the J-hook  46 , and are anchored at the side frame  18  via the J-hook  46 . 
     Next, the restraining portion  52 , which is a principal portion of the present invention, is described. 
     The restraining portion  52  includes the joining trim cover  54 , which serves as a joining member, and the clips  58 , each of which serves as a fixing member. 
     The joining trim cover  54  is fabricated of a cloth material in a long, narrow, substantially rectangular shape, and is disposed at the seat right side of the overlap portion  42 . A seat left side end portion of the joining trim cover  54  is disposed between the overlap portion  42  and the J-hook  46 . The joining trim cover  54  extends along the seat front-and-rear direction in plan view, and is sewn to both the overlap portion  42  and the J-hook  46  in the region of the second seam portion  48 . A seat width direction middle portion of the joining trim cover  54  is inflected to the seat forward side at the proximal end portion of the J-hook  46 . A seat right side end portion of the joining trim cover  54  is disposed along a seat rear side face of the rear end wall  20 . A pair of penetrating holes  56  are formed in the joining trim cover  54 , at positions corresponding with the aforementioned fixing holes  22  of the rear end wall  20 . A length dimension in the seat width direction from the penetrating holes  56  to the distal end of the hook portion  50  is set shorter than a length dimension in the seat width direction from the fixing holes  22  of the rear end wall  20  to the distal end of the flange portion  24 . 
     Each clip  58  is fabricated of resin. The clip  58  includes a seat portion  60  in a substantially circular disc shape and an anchoring portion  62  that protrudes to the seat forward side from a central portion of the seat portion  60 . A distal end portion of the anchoring portion  62  is formed in a substantial wedge shape in cross section. The anchoring portion  62  passes through the penetrating hole  56  in the joining trim cover  54  and the fixing hole  22  in the side frame  18 , and the distal end portion of the anchoring portion  62  is anchored at the side frame  18 . Thus, the joining trim cover  54  is fixed to the side frame  18  by the clips  58 . 
     Now, while a procedure when the trim cover  32  is attached to the seatback  14  is described, the operation and effects of the present invention are described. 
     The seat left side end portion of the first rear trim cover portion  36  and the seat right side end portion of the second rear trim cover portion  40  are disposed along the seat front-and-rear direction so as to oppose one another. Then the first rear trim cover portion  36  and second rear trim cover portion  40  are sewn together in the region of the first seam portion  44 . Thus, the overlap portion  42  is formed. The overlap portion  42  is sewn to both the J-hook  46  and the joining trim cover  54  in the region of the second seam portion  48 . 
     The bag-shaped trim cover  32  that is open to downward of the seat is placed over the back pad  26 . Thus, the back pad  26  is covered with the trim cover  32 . At this time, without the seat rear side end portion of the side trim cover portion  34  and the seat rightward end portion of the first rear trim cover portion  36  being joined, the overlap portion  42  is disposed in the recess portion  28 . 
     In this state, the first rear trim cover portion  36  is lifted to the seat rear side. In this state, in which the J-hook  46  can be seen from the seat rear side of the seatback  14 , the J-hook  46  is moved to the seat forward side and anchored at the flange portion  24  of the side frame  18 . Accordingly, the whole length of the J-hook  46  is curved so as to project to the seat forward side along the flange portion  24 , and the overlap portion  42  (including the first rear trim cover portion  36  and the second rear trim cover portion  40 ) is pulled in to the seat forward side. Thus, the first rear trim cover portion  36  and the second rear trim cover portion  40  are curved along the side frame  18  so as to project to the seat forward side. 
     Then the joining trim cover  54  that has been sewn to the overlap portion  42  is placed along the seat rear side face of the rear end wall  20 , and the clips  58  are inserted into the penetrating holes  56  of the joining trim cover  54  and the fixing holes  22  of the rear end wall  20 . Thus, the joining trim cover  54  is fixed to the rear end wall  20  with the clips  58 . Hence, movements of the J-hook  46  and the overlap portion  42  to the seat left side are restricted. The fastener  38  is closed downward along the seat in this state, and the seat rear end portion of the side trim cover portion  34  and the seat right end portion of the first rear trim cover portion  36  are joined together. 
     As described above, the overlap portion  42  and the side frame  18  are joined together by the restraining portion  52  (the joining trim cover  54  and the clips  58 ), and movements of the overlap portion  42  to the seat left side (the seat width direction inner side) are restrained. Hence, if a tension force acts on the first rear trim cover portion  36  and the second rear trim cover portion  40  in a direction toward the seat left side (the seat width direction inner side) and the overlap portion  42  and J-hook  46  act to move to the seat left side (the side of the distal end portion of the flange portion  24 ), movement of the overlap portion  42  to the seat left side is restrained by the restraining portion  52 , and therefore movement of the J-hook  46  is restrained. Because the J-hook  46  is sewn to the overlap portion  42  along the seat up-and-down direction, the whole length of the overlap portion  42  is pulled in to the seat forward side by the J-hook  46 , and the first rear trim cover portion  36  and second rear trim cover portion  40  are curved along the side frame  18  so as to project to the seat forward side. Therefore, the appearance of the seatback  14  may be improved and thickness of the seatback  14  may be reduced, while detachment of the J-hook  46  from the side frame  18  (the flange portion  24 ) is suppressed. 
     Further, after the joining trim cover  54  is sewn to the overlap portion  42  and the J-hook  46  is anchored at the flange portion  24  of the side frame  18 , the joining trim cover  54  from the overlap portion  42  is disposed along the rear end wall  20  and is fixed to the side frame  18  with the clips  58 . In addition, the length dimension in the seat width direction from the penetrating holes  56  to the distal end of the hook portion  50  is set to be shorter than the length dimension in the seat width direction from the fixing holes  22  in the rear end wall  20  to the distal end of the flange portion  24 . Therefore, relative movement of the joining trim cover  54  with respect to the rear end wall  20  may be restrained and detachment of the J-hook  46  from the side frame  18  (the flange portion  24 ) may be effectively suppressed. 
     The joining trim cover  54  is sewn to both the J-hook  46  and the overlap portion  42  in the region of the second seam portion  48 . Therefore, a portion of the overlap portion  42  that is sewn to the joining trim cover  54  and the J-hook  46  may be set to a single location. Moreover, because movement of the J-hook  46  is restricted directly by the joining trim cover  54 , detachment of the J-hook  46  from the side frame  18  (the flange portion  24 ) may be even more effectively suppressed. 
     The hook portion  50  of the J-hook  46  is open to the seat rear side and is anchored at the flange portion  24  of the side frame  18 , and the flange portion  24  is angled in plan view to the seat left side (the seat width direction inner side) toward the seat forward side. Therefore, the J-hook  46  may be anchored at the flange portion  24  from the seat rear side more easily than in a structure in which the flange portion  24  is inflected to the seat forward side from the rear end wall  20 . Thus, characteristics of assembly when the J-hook  46  is being anchored at the side frame  18  may be improved. 
     The seat rear end portion of the side trim cover portion  34  and the seat right end portion of the first rear trim cover portion  36  are joined together by the fastener  38 . Therefore, the J-hook  46  may be anchored at the side frame  18  in the state in which the first rear trim cover portion  36  is lifted to the seat rear side, and then the seat rear end portion of the side trim cover portion  34  and seat right end portion of the first rear trim cover portion  36  may be joined together with the fastener  38 . Further, for example, in a case in which the fastener  38  at the seat rear-left corner portion of the seatback  14  is closed first, even if a tension force to the seat left side acts on on the first rear trim cover portion  36  and a pulling force to the seat left side acts on the J-hook  46  at the seat right side, detachment of the J-hook  46  from the flange portion  24  may be suppressed. 
     The J-hooks  46  are provided as a pair in the seat width direction, and movement of each overlap portion  42  to the seat width direction inner side is restrained by the joining trim cover  54  and the clips  58 . Therefore, if, for example, the J-hook  46  disposed at the seat right side is anchored at the flange portion  24  and then the J-hook  46  disposed at the seat left side is anchored at the seat left side flange portion  24 , detachment of the J-hook  46  disposed at the seat right side from the flange portion  24  while the J-hook  46  disposed at the seat left side is being anchored may be suppressed. Thus, characteristics of assembly when the J-hooks  46  are being anchored at the side frames  18  may be improved. 
     Because the joining trim cover  54  is fabricated of a cloth material, the joining trim cover  54  may be placed along the rear side face of the rear end wall  20  of the side frame  18  with ease. 
     VARIANT EXAMPLE 
     As illustrated in  FIG. 4 , a variant example of the vehicle seat  10  has substantially the same structure as the vehicle seat  10  according to the present exemplary embodiment but differs as follows. In the vehicle seat  10  of the variant example, the joining trim cover  54  is not sewn to the overlap portion  42  together with the J-hook  46  in the region of the second seam portion  48 . The seat left side end portion of the joining trim cover  54  is inflected to the seat rear side and is sewn to the overlap portion  42  in the region of a third seam portion  64 . In other words, the joining trim cover  54  and the J-hook  46  are sewn to the overlap portion  42  separately in the variant example. In this case too, movements of the overlap portion  42  to the seat left side may be restrained by the joining trim cover  54  and the clips  58 . Therefore, movements of the J-hook  46  to the seat left side may be restrained. Accordingly, the variant example may provide the same operation and effects as the present exemplary embodiment. 
     In the present exemplary embodiment and the variant example, the joining trim cover  54  is formed of a cloth material, but the material of the joining trim cover  54  is not limited thus. For example, the joining trim cover  54  may be fabricated of resin and formed in a plate shape. In this case, the joining trim cover  54  and the clips  58  may be formed integrally, or the joining trim cover  54 , the clips  58  and the J-hook  46  may be formed integrally. 
     In the present exemplary embodiment and the variant example, the flange portion  24  is disposed to be angled to the seat left side (the seat width direction inner side) toward the seat forward side in plan view. Instead, the flange portion  24  may be inflected to the seat forward side in plan view. 
     In the present exemplary embodiment and the variant example, the seat left side end portion of the joining trim cover  54  and the J-hook  46  are arranged in this order at the seat right side of the overlap portion  42 , and these are sewn together. Instead, the J-hook  46  and the seat left side end portion of the joining trim cover  54  may be arranged in this order at the seat right side of the overlap portion  42  and sewn together. 
     In the present exemplary embodiment, the joining trim cover  54  is sewn to both the J-hook  46  and the overlap portion  42 . Instead, the joining trim cover  54  may be sewn to the J-hook  46  and the joining trim cover  54  to which the J-hook  46  has been sewn may be sewn to the overlap portion  42 . 
     In the present exemplary embodiment and the variant example, the joining trim cover  54  is fixed to the side frame  18  by the pair of clips  58 , but the number of the clips  58  is not limited thus. For example, the joining trim cover  54  may be fixed to the side frame  18  by a single clip  58 . In this case, the fixing hole  22  of the side frame  18  may be disposed at a position at a seat up-and-down direction middle portion of the rear end wall  20 .