JP5531590B2

JP5531590B2 - Vehicle seat

Info

Publication number: JP5531590B2
Application number: JP2009276440A
Authority: JP
Inventors: 英之泉川
Original assignee: Toyota Boshoku Corp
Current assignee: Toyota Boshoku Corp
Priority date: 2009-12-04
Filing date: 2009-12-04
Publication date: 2014-06-25
Anticipated expiration: 2029-12-04
Also published as: JP2011115442A

Description

本発明は、シートバックを途中で屈曲可能（いわゆる中折れ可能）とした車両用シートに関する。 The present invention relates to a vehicle seat in which a seat back can be bent in the middle (so-called half-foldable).

この種の車両用シートとして、特許文献１の車両用シートが公知である。この車両用シートは、シートクッションとシートバックを有し、これら各部材が、シート外形をなすクッション材と、クッション材を被覆する表皮材を有する。
そしてシートバックは、シートクッションから起立可能である（着座姿勢をとることができる）とともに、着座姿勢時において上下方向途中で着座側に屈曲可能（中折れ可能）である。 As this type of vehicle seat, the vehicle seat disclosed in Patent Document 1 is known. The vehicle seat includes a seat cushion and a seat back, and each of these members includes a cushion material that forms an outer shape of the seat and a skin material that covers the cushion material.
The seat back can stand up from the seat cushion (can take a seating posture) and can be bent (can be folded in the middle) in the vertical direction in the seating posture.

ところでこの種の車両用シートでは、シートの見栄えなどを考慮して、クッション材に対して表皮材を密着状態で被覆する。この状態でシートバックを中折れ姿勢にすると、裏面側の表皮材が緊張するとともに、着座側の表皮材に弛み（いわゆる周長差）が発生する。このため上述の構成では、シートバックの中折れ時に、着座側の表皮材にシワがよるなどしてシートの意匠性が悪化することがあった。 By the way, in this type of vehicle seat, in consideration of the appearance of the seat and the like, the skin material is covered in close contact with the cushion material. In this state, when the seat back is in the folded position, the skin material on the back side is tensioned and slack (so-called circumferential length difference) occurs in the skin material on the seating side. For this reason, in the above-described configuration, when the seat back is folded, the seat design may deteriorate due to wrinkles on the seat-side skin material.

そこで特許文献１には、表皮材の弛み（シワ等）を局在させて、シートの見栄えの悪化を低減する技術の開示がある。すなわち特許文献１では、シートバックの一部において、表皮材とクッション材を非接着状態とする（弛みを促す）とともに、一部とは異なる他部において、表皮材とクッション材を接着固定する。
この構成によると、シートバックの中折れ時において、シートバック一部（非接着部分）に表皮材の弛みが集中する一方、シートバック他部の表皮材の弛みが低減される。 Therefore, Patent Document 1 discloses a technique for localizing slack (such as wrinkles) of the skin material to reduce deterioration of the appearance of the sheet. That is, in Patent Document 1, the skin material and the cushion material are brought into a non-bonded state (promotes slackness) in a part of the seat back, and the skin material and the cushion material are bonded and fixed in another part different from the part.
According to this configuration, when the seat back is folded, the slack of the skin material concentrates on a part of the seat back (non-adhered portion), while the slack of the skin material on the other part of the seat back is reduced.

特開２００７−２８２８２０号公報JP 2007-282820 A

しかし公知技術では、シート中折れ時において、シートバック一部の表皮材の弛みが着座側に突出することがあった。このため公知技術の構成は、シートの意匠性等を考慮すると、すんなり採用できる構成ではなかった。
本発明は上述の点に鑑みて創案されたものであり、本発明が解決しようとする課題は、表皮材の弛みの着座側への突出を防止又は低減することにある。 However, in the known technique, when the seat is folded, a part of the skin material of the seat back sometimes protrudes toward the seating side. For this reason, the configuration of the known technique is not a configuration that can be easily adopted in consideration of the design properties of the sheet and the like.
The present invention has been devised in view of the above points, and a problem to be solved by the present invention is to prevent or reduce the protrusion of the slack of the skin material to the seating side.

上記課題を解決するための手段として、第１発明の車両用シートは、シートクッションとシートバックを備える。そしてシートバックが、シートクッション側の第一部位と、第一部位に屈曲可能に連結する第二部位とを有して、着座姿勢時において上下方向途中で屈曲可能（中折れ可能）である。この種のシート構成では、中折れ時における表皮材の弛みが着座側に極力突出しない（見栄えの良いシート構成である）ことが望ましい。 As means for solving the above problems, a vehicle seat of the first invention includes a seat cushion and a seat back. The seat back includes a first portion on the seat cushion side and a second portion that is connected to the first portion so as to be bendable, and can be bent (can be folded in the middle) in the vertical direction during the sitting posture. In this type of seat configuration, it is desirable that the slack of the skin material at the time of folding is not protruded as much as possible to the seating side (a seat configuration with a good appearance).

そこで本発明では、車両用シートが、第一部位を被覆する第一表皮部と、第二部位を被覆する第二表皮部と、第一表皮部と第二表皮部を連結する第三表皮部とを有する。
そして第三表皮部の剛性を、第一表皮部と第二表皮部よりも低く設定する。そのうえで第一部位に対する第二部位の屈曲に応じて、第三表皮部をシート内方に向けて弛み変形（例えば湾曲又は屈曲変形）させる。そして弛み変形した第三表皮部を、シート内方の隙間部に収納することにより、第三表皮部の着座側への突出を防止又は低減する構成とした。
また第１発明の車両用シートは、第一表皮部及び第二表皮部の少なくとも一方の端部（例えば上端部又は下端部）をシート内方に向けて内折りする。さらに前記一方の端部（内折り部分）を第三表皮部に縫着線にて縫合結合して、第三表皮部を、一方の端部よりもシート内方に配置する。
そして本発明では、第一部位に対する第二部位の屈曲動作により、一方の端部が、着座側から第三表皮部をシート内方に向けて押圧する構成とした。このように本発明では、一方の端部（内折りされて剛性の高められた部分）によって、第三表皮部のシート内方への弛み変形を助長することができる。
さらに第１発明の車両用シートは、第三表皮部のシート内方への湾曲変形を助長する助長手段として、一方の端部と第三表皮部の結合を強める下記の（１）又は（２）の構成を備える。
（１）一方の端部と第三表皮部が、これらの裏面に熱融着されたシート材にて一体化される。
（２）一方の端部と第三表皮部が、縫着線とともに、縫着線とは異なる他の縫着線にて縫合結合されて一体化される。 Therefore, in the present invention, the vehicle seat includes a first skin portion covering the first portion, a second skin portion covering the second portion, and a third skin portion connecting the first skin portion and the second skin portion. And have.
And the rigidity of a 3rd skin part is set lower than a 1st skin part and a 2nd skin part. Then, according to the bending of the second part with respect to the first part, the third skin part is slackly deformed (for example, curved or bent) toward the inside of the sheet. And the 3rd skin part which carried out the slack deformation was stored in the clearance part inside a sheet | seat, and it was set as the structure which prevents or reduces the protrusion to the seating side of a 3rd skin part.
In the vehicle seat of the first invention, at least one end portion (for example, an upper end portion or a lower end portion) of the first skin portion and the second skin portion is folded inward toward the seat inner side. Further, the one end portion (inwardly folded portion) is stitched and joined to the third skin portion with a sewing line, and the third skin portion is disposed inside the sheet from the one end portion.
And in this invention, it was set as the structure which one edge part presses a 3rd skin part toward a seat inward from a seating side by bending operation | movement of the 2nd site | part with respect to the 1st site | part. As described above, in the present invention, the slack deformation of the third skin portion toward the inside of the sheet can be promoted by one end portion (the portion that is folded inward and has increased rigidity).
Furthermore, the vehicle seat of the first invention is the following (1) or (2) that strengthens the connection between one end portion and the third skin portion as a facilitating means for facilitating the deformation of the third skin portion inward of the seat. ).
(1) One end portion and the third skin portion are integrated with a sheet material heat-sealed to these back surfaces.
(2) One end portion and the third skin portion are stitched and integrated together with a sewing line at another sewing line different from the sewing line.

第２発明の車両用シートは、シートクッションとシートバックを備えるとともに、シートバックが、シートクッション側の第一部位と、第一部位に対して屈曲自在に連結する第二部位とを有する。
そしてシートバックが、第一部位を被覆する第一表皮部と、第二部位を被覆する第二表皮部と、第一表皮部と第二表皮部を連結する第三表皮部とを有し、第三表皮部の剛性を、第一表皮部と第二表皮部よりも低く設定するとともに、第一部位に対する第二部位の屈曲に応じて、第三表皮部をシート内方に向けて弛み変形させつつ、シート内方の隙間部に第三表皮部を収納する構成とする。
また第一表皮部及び第二表皮部の少なくとも一方の端部をシート内方に向けて内折りするとともに、一方の端部と第三表皮部を縫着線にて縫合結合して、第三表皮部を、一方の端部よりもシート内方に配置し、第一部位に対する第二部位の屈曲動作により、一方の端部が、第三表皮部をシート内方に向けて押圧する構成とする。
そして第三表皮部のシート内方への湾曲変形を助長する助長手段として、一方の端部の裏面側に対面状に配設されてその剛性を高める面状の裏材を備える。 The vehicle seat of the second invention includes a seat cushion and a seat back, and the seat back includes a first part on the seat cushion side and a second part that is flexibly connected to the first part.
And the seat back has a first skin part covering the first part, a second skin part covering the second part, and a third skin part connecting the first skin part and the second skin part, The rigidity of the third skin part is set lower than that of the first skin part and the second skin part, and the third skin part is slackened and deformed toward the inside of the seat according to the bending of the second part with respect to the first part. The third skin portion is housed in the gap portion inside the seat.
In addition, at least one end portion of the first skin portion and the second skin portion is folded inward toward the inside of the seat, and one end portion and the third skin portion are stitched together by a sewing line, A structure in which the skin portion is arranged inward of the sheet from one end portion, and one end portion presses the third skin portion inward of the sheet by the bending operation of the second portion with respect to the first portion. To do.
And as a facilitating means for facilitating the deformation of the third skin portion inward of the sheet, a sheet-like backing material is provided on the back surface side of one end portion so as to face it and increase its rigidity.

本発明に係る第１発明及び第２発明によれば、シート中折れ時における表皮材の弛みの突出を防止又は低減することができる。 According to the first and second aspects of the present invention according to the present invention, Ru can prevent or reduce the protrusion of the looseness of the skin material during the bending in the sheet.

車両用シートの斜視図である。It is a perspective view of a vehicle seat. シートバック一部の斜視図である。It is a perspective view of a part of the seat back. （ａ）は、第一表皮部及び第二表皮部の縦断面図であり、（ｂ）は、第三表皮部の縦断面図である。(A) is a longitudinal cross-sectional view of a 1st skin part and a 2nd skin part, (b) is a longitudinal cross-sectional view of a 3rd skin part. （ａ）は、通常時のシートバックにおける図２のＡ−Ａ線断面図であり、（ｂ）は、屈曲時のシートバックにおける図２のＡ−Ａ線断面図である。(A) is the sectional view on the AA line of FIG. 2 in the normal seat back, (b) is the sectional view on the AA line of FIG. 2 in the seat back at the time of bending. （ａ）は、表皮材一部の裏面図であり、（ｂ）は、表皮材一部の別の裏面図である。(A) is a back view of a part of the skin material, and (b) is another back view of a part of the skin material. （ａ）は、別例１の図２のＡ−Ａ線断面図であり、（ｂ）は、別例２の図２のＡ−Ａ線断面図であり、（ｃ）は、別例３の図２のＡ−Ａ線断面図である。(A) is the sectional view on the AA line of FIG. 2 of another example 1, (b) is the sectional view on the AA line of FIG. 2 of another example 2, and (c) is another example 3 of FIG. It is the sectional view on the AA line of FIG.

以下、本発明を実施するための形態を、図１〜図６を参照して説明する。なお各図には、適宜、車両用シート前方に符号Ｆ、車両用シート後方に符号Ｂ、車両用シート上方に符号ＵＰ、車両用シート下方に符号ＤＷを付す。
図１の車両用シート２は、シートクッション４とシートバック６を有する。これら各シート構成は、各々、シート外形をなすクッション材４Ｐ（６Ｐ）と、クッション材を被覆する表皮材４Ｓ（６Ｓ）とを有する。 DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. In each of the drawings, a reference symbol F is attached to the front of the vehicle seat, a reference symbol B to the rear of the vehicle seat, a reference symbol UP to the upper side of the vehicle seat, and a reference symbol DW to the lower side of the vehicle seat.
The vehicle seat 2 in FIG. 1 has a seat cushion 4 and a seat back 6. Each of these seat configurations includes a cushion material 4P (6P) that forms the outer shape of the seat, and a skin material 4S (6S) that covers the cushion material.

［シートバック］
本実施例のシートバック６（略矩形）は、乗員の着座可能な着座面（メイン部６ａ，サイド部６ｂ）と、シート側面（カマチ部６ｃ）を有する。メイン部６ａは、シート前面中央の凹状部位であり、サイド部６ｂは、メイン部６ａ両側の凸状部位である。
またシートバック６は、下部側（シートクッション４側）の第一部位６１と、第一部位６１に屈曲可能に連結する上部側の第二部位６２と、中折れ起点Ｘを有する。中折れ起点Ｘは、シート幅方向に線状に形成される部位であり、シートバック６の上下方向途中（第一部位６１と第二部位６２の間）に配置する。 [Seatback]
The seat back 6 (substantially rectangular) of the present embodiment has a seating surface (main portion 6a, side portion 6b) on which an occupant can be seated and a seat side surface (kamachi portion 6c). The main portion 6a is a concave portion at the center of the front surface of the seat, and the side portions 6b are convex portions on both sides of the main portion 6a.
The seat back 6 has a first part 61 on the lower side (seat cushion 4 side), a second part 62 on the upper side that is connected to the first part 61 so as to be bendable, and a folding origin X. The middle folding starting point X is a part formed in a line shape in the seat width direction, and is arranged in the middle of the seat back 6 in the vertical direction (between the first part 61 and the second part 62).

そして本実施例では、シートバック６が、シートクッション４から起立する着座姿勢（図１の実線）と、中折れ起点Ｘで着座側に屈曲する中折れ姿勢（図１の二点破線）をとることができる。この種のシート構成では、シート中折れ時における表皮材６Ｓ（特にサイド部６ｂとカマチ部６ｃ）の弛みが着座側に極力突出しないことが望ましい。
そこで本実施例では、後述するシート構成によって、シート中折れ時における表皮材６Ｓの弛みの突出を防止又は低減することとした。以下、各構成について詳述する。 In the present embodiment, the seat back 6 takes a sitting posture (solid line in FIG. 1) standing up from the seat cushion 4 and a middle folding posture (two-dot broken line in FIG. 1) bending toward the seating side at the middle folding starting point X. be able to. In this type of seat configuration, it is desirable that the slack of the skin material 6S (particularly the side portion 6b and the kerchime portion 6c) when the seat is folded is not projected to the seating side as much as possible.
Therefore, in this embodiment, the sheet structure described later prevents or reduces the slack protrusion of the skin material 6S when the sheet is folded. Hereinafter, each configuration will be described in detail.

［表皮材］
表皮材６Ｓは、クッション材６Ｐを密着状に被覆する部材である。本実施例の表皮材６Ｓは、メイン部６ａを覆うメイン表皮部１０と、サイド部６ｂを覆う部分（第一表皮部１１，第二表皮部１２，第三表皮部１３）と、後述の隙間部１５を有する（図１及び図４を参照）。
そして本実施例では、第三表皮部１３の剛性が、第一表皮部１１と第二表皮部１２よりも低く設定されて、比較的弛みやすい構成とされる。
なおクッション材６Ｐは、中折れ起点Ｘに対応する位置（第一部位６１と第二部位６２の間）に凹部６Ｃを有することが好ましい（図４を参照）。例えばクッション材６Ｐ（着座側）に、シート幅方向に走る溝状の凹部６Ｃを形成することで、クッション材６Ｐが着座側にスムーズに屈曲することができる。 [Skin material]
The skin material 6S is a member that covers the cushion material 6P in a close contact state. The skin material 6S of the present embodiment includes a main skin portion 10 that covers the main portion 6a, a portion that covers the side portion 6b (the first skin portion 11, the second skin portion 12, and the third skin portion 13), and a gap described later. It has a portion 15 (see FIGS. 1 and 4).
In the present embodiment, the rigidity of the third skin portion 13 is set to be lower than that of the first skin portion 11 and the second skin portion 12, and the structure is relatively easy to loosen.
In addition, it is preferable that the cushioning material 6P has the recessed part 6C in the position (between the 1st site | part 61 and the 2nd site | part 62) corresponding to the folding origin X (refer FIG. 4). For example, by forming a groove-like recess 6C running in the seat width direction on the cushion material 6P (seat side), the cushion material 6P can be smoothly bent toward the seat side.

（第一表皮部・第二表皮部）
第一表皮部１１は、第一部位６１を被覆する部位であり、サイド部６ｂ（下部側）とカマチ部６ｃ（下部側）を被覆できる。また第二表皮部１２は、第二部位６２を被覆する部位であり、サイド部６ｂ（上部側）とカマチ部６ｃ（上部側）を被覆できる。
そして本実施例では、第一表皮部１１の上端部と、第二表皮部１２の下端部を、後述の第三表皮部１３によって連結する。
つぎに第一表皮部１１の前側（着座側）をメイン表皮部１０の側方に縫着するとともに、第一表皮部１１の後側を、フック部材（図示省略）等によってシートバック６後部に係止する（図１を参照）。また同様に第二表皮部１２の前側（着座側）をメイン表皮部１０に縫着するとともに、第二表皮部１２の後側を、フック部材（図示省略）等によってシートバック６後部に係止する。 (1st skin part, 2nd skin part)
The first skin portion 11 is a portion covering the first portion 61, and can cover the side portion 6b (lower side) and the keratin portion 6c (lower side). Moreover, the 2nd skin part 12 is a site | part which coat | covers the 2nd site | part 62, and can coat | cover the side part 6b (upper side) and the kamachi part 6c (upper side).
In this embodiment, the upper end portion of the first skin portion 11 and the lower end portion of the second skin portion 12 are connected by a third skin portion 13 described later.
Next, the front side (sitting side) of the first skin part 11 is sewn to the side of the main skin part 10, and the rear side of the first skin part 11 is attached to the rear part of the seat back 6 by a hook member (not shown) or the like. Lock (see FIG. 1). Similarly, the front side (sitting side) of the second skin portion 12 is sewn to the main skin portion 10, and the rear side of the second skin portion 12 is locked to the rear portion of the seat back 6 by a hook member (not shown). To do.

そして第一表皮部１１と第二表皮部１２は、各々、第一積層体３１と第二積層体３２を有する（図３を参照）。
第一積層体３１は、表材３１ａと、第一パッド材３１ｂと、第一裏基布３１ｃを有する。また第二積層体３２は、第二パッド材３２ｄと、第二裏基布３２ｅを有する。
そして第一積層体３１（第二積層体３２）は、各積層体の構成を積層したのち、ラミネート等の接合手段にて各構成を一体化することで作製できる（図３（ａ）を参照）。このとき第一パッド材３１ｂと第一裏基布３１ｃをラミネートにて一体化したのち、表材３１ａ（皮革等）を縫着することもできる（図３（ｂ）を参照）。
次に第一積層体３１と第二積層体３２を積層したのち、縫着等の接合手段にて一体化することにより、第一表皮部１１（第二表皮部１２）を形成することができる。
なお第一表皮部１１と第二表皮部１２を、各々、第一積層体３１（３１ａ，３１ｂ，３１ｃ）のみで構成するとともに、第一パッド材３１ｂの厚み寸法を大きく設定する（例えば第二パッド材３２ｄと同程度に設定する）こともできる。 And the 1st skin part 11 and the 2nd skin part 12 have the 1st laminated body 31 and the 2nd laminated body 32, respectively (refer FIG. 3).
The first laminated body 31 includes a front material 31a, a first pad material 31b, and a first back base fabric 31c. The second laminated body 32 includes a second pad material 32d and a second back base fabric 32e.
And the 1st laminated body 31 (2nd laminated body 32) can be produced by laminating | stacking the structure of each laminated body, and integrating each structure by joining means, such as a laminate (refer Fig.3 (a)). ). At this time, after the first pad material 31b and the first back base fabric 31c are integrated by lamination, the front material 31a (leather or the like) can be sewn (see FIG. 3B).
Next, after laminating the first laminated body 31 and the second laminated body 32, the first skin portion 11 (second skin portion 12) can be formed by integrating with a joining means such as sewing. .
The first skin portion 11 and the second skin portion 12 are each composed of only the first laminated body 31 (31a, 31b, 31c), and the thickness dimension of the first pad material 31b is set large (for example, the second skin portion 31b). It can also be set to the same level as the pad material 32d.

ここで表材３１ａは、各表皮部の着座側をなす部材であり、布帛（織物，編物，不織布）、皮革（天然皮革，合成皮革）及びこれらの複合材を例示できる。
また第一パッド材３１ｂ及び第二パッド材３２ｄとして、スラブウレタンなどの発泡樹脂成形体や、天然繊維や合成繊維などの繊維積層体を例示できる。なお第一パッド材３１ｂと第二パッド材３２ｄの材質は、同一でもよく非同一でもよい。
また第一裏基布３１ｃ及び第二裏基布３２ｅとして布帛を例示できる。なお第一裏基布３１ｃ及び第二裏基布３２ｅの材質は、同一でもよく非同一でもよい。 Here, the surface material 31a is a member that forms the seating side of each skin portion, and examples thereof include fabric (woven fabric, knitted fabric, non-woven fabric), leather (natural leather, synthetic leather), and composite materials thereof.
Examples of the first pad material 31b and the second pad material 32d include foamed resin molded bodies such as slab urethane, and fiber laminates such as natural fibers and synthetic fibers. The material of the first pad material 31b and the second pad material 32d may be the same or non-identical.
Moreover, a fabric can be illustrated as the 1st back base fabric 31c and the 2nd back base fabric 32e. The material of the first back base fabric 31c and the second back base fabric 32e may be the same or non-identical.

（第三表皮部）
第三表皮部１３は、第一表皮部１１と第二表皮部１２を連結する部材であり、シートバック６の上下方向途中（中折れ起点Ｘの近傍）に配置することができる（図１及び図２を参照）。
本実施例の第三表皮部１３（長尺な帯状）は、シートバック６の両側に各々配置しており、シート幅方向に向かってサイド部６ｂとカマチ部６ｃを横断する。
そして本実施例では、第三表皮部１３の上部を第一表皮部１１に縫合結合するとともに、第三表皮部１３の下部を第二表皮部１２に縫合結合する（詳細後述）。また第三表皮部１３の一側（着座側）をメイン表皮部１０の側面に縫合結合するとともに、第三表皮部１３の他側（後側）をシート裏面に結合する。
なお第三表皮部１３（他側）の結合部位は特に限定しないが、例えばシート裏面側の表皮部に縫合結合したり、シート裏面側のフレーム部材（図示省略）に係止したりすることができる。 (3rd skin)
The 3rd skin part 13 is a member which connects the 1st skin part 11 and the 2nd skin part 12, and can be arrange | positioned in the up-down direction middle (near the folding center X) of the seat back 6 (FIG. 1 and (See FIG. 2).
The third skin portion 13 (long belt-like shape) of the present embodiment is disposed on both sides of the seat back 6 and crosses the side portion 6b and the keratin portion 6c in the seat width direction.
In this embodiment, the upper portion of the third skin portion 13 is stitched to the first skin portion 11 and the lower portion of the third skin portion 13 is stitched to the second skin portion 12 (details will be described later). Further, one side (seat side) of the third skin portion 13 is stitched to the side surface of the main skin portion 10, and the other side (rear side) of the third skin portion 13 is joined to the back surface of the seat.
In addition, although the coupling | bond part of the 3rd skin part 13 (other side) is not specifically limited, For example, it may sew-connect with the skin part of a sheet | seat back surface side, or may be locked to the frame member (illustration omitted) of a sheet | seat back surface side. it can.

（第三表皮部の剛性）
本実施例では、第三表皮部１３の剛性を、上述の第一表皮部１１及び第二表皮部１２よりも低く設定することができる。
例えば第三表皮部１３の厚み寸法を比較的小さく設定することで、第三表皮部１３の剛性を低くすることができる。本実施例では、第三表皮部１３を第一積層体３１（３１ａ，３１ｂ，３１ｃ）のみで構成することにより、第一表皮部１１（第二表皮部１２）よりも剛性を低くすることとした（図２または図３を参照）。
なお第三表皮部１３を、第一表皮部１１及び第二表皮部１２よりも剛性の低い材質にて構成することもできる。 (Rigidity of the third skin)
In the present embodiment, the rigidity of the third skin portion 13 can be set lower than that of the first skin portion 11 and the second skin portion 12 described above.
For example, the rigidity of the 3rd skin part 13 can be made low by setting the thickness dimension of the 3rd skin part 13 comparatively small. In the present embodiment, by configuring the third skin portion 13 only with the first laminated body 31 (31a, 31b, 31c), the rigidity is made lower than that of the first skin portion 11 (second skin portion 12). (See FIG. 2 or FIG. 3).
In addition, the 3rd skin part 13 can also be comprised with the material whose rigidity is lower than the 1st skin part 11 and the 2nd skin part 12. FIG.

［縫合作業］
図４及び図５を参照して、第一表皮部１１の上端部をシート内方に向けて内折り状とする（第一縫合部２１を形成する）。また第二表皮部１２の下端部をシート内方に向けて内折り状とする（第二縫合部２２を形成する）。このとき第一縫合部２１と第二縫合部２２は、ともに内折りされて剛性が高められる（厚みが増して弛み変形しにくい構成となる）。
そして第一縫合部２１の裏面側（内折り端）に、第三表皮部１３の下端部を縫着する（縫着線ＳＥＷ１）。またこれに前後して、第二縫合部２２の裏面側（内折り端）に、第三表皮部１３の上端部を縫着する（縫着線ＳＥＷ２）。 [Suture work]
With reference to FIG.4 and FIG.5, the upper end part of the 1st outer skin part 11 is made into an inward folding shape toward a sheet | seat inner side (the 1st stitching | suture part 21 is formed). Further, the lower end portion of the second skin portion 12 is inwardly folded toward the inside of the sheet (the second stitching portion 22 is formed). At this time, both the first stitched portion 21 and the second stitched portion 22 are folded inward to increase the rigidity (the thickness increases and the structure becomes difficult to loosen and deform).
And the lower end part of the 3rd skin part 13 is sewn on the back surface side (inward folding end) of the 1st stitching part 21 (sewing line SEW1). Before and after this, the upper end portion of the third skin portion 13 is sewn to the back surface side (inner folding end) of the second stitching portion 22 (sewing line SEW2).

つぎに第一表皮部１１と第二表皮部１２と第三表皮部１３を横断するように縫合する（縫着線ＳＥＷ３）。この縫着線ＳＥＷ３により、第一縫合部２１及び第二縫合部２２の裏面側に第三表皮部１３を配置した状態を保持することができる。そしてこれら表皮部１１，１２，１３をメイン表皮部１０に縫着することで、表皮材６Ｓ（袋状）を形成することができる（縫着線ｓｅｗ、図５（ｂ）を参照）。
このように本実施例では、第一縫合部２１及び第二縫合部２２（ともに内折り部分）の裏面側に第三表皮部１３を縫合結合することで、第三表皮部１３をシート内方に配置する。また第一表皮部１１と第二表皮部１２と第三表皮部１３をメイン表皮部１０に縫着して、第三表皮部１３を裏面側に配置する構成とすることができる。
そして第一部位６１に対する第二部位６２の屈曲動作により、第一縫合部２１と第二縫合部２２（各端部）が、着座側から第三表皮部１３をシート内方に向けて押圧することができる。 Next, the first skin portion 11, the second skin portion 12, and the third skin portion 13 are sewn so as to cross (sewing line SEW3). With the sewing line SEW3, it is possible to maintain the state in which the third skin portion 13 is disposed on the back side of the first stitching portion 21 and the second stitching portion 22. And, by covering these skin portions 11, 12, and 13 to the main skin portion 10, a skin material 6S (bag-like) can be formed (sewing line sew, see FIG. 5B).
As described above, in this embodiment, the third skin portion 13 is joined to the inner side of the sheet by stitching the third skin portion 13 to the back side of the first stitching portion 21 and the second stitching portion 22 (both inwardly folded portions). To place. Moreover, it can be set as the structure which sews the 1st skin part 11, the 2nd skin part 12, and the 3rd skin part 13 to the main skin part 10, and arrange | positions the 3rd skin part 13 in a back surface side.
Then, by the bending operation of the second part 62 with respect to the first part 61, the first stitching part 21 and the second stitching part 22 (each end part) press the third epidermis part 13 toward the seat inward from the seating side. be able to.

（隙間部）
隙間部１５は、シートバック６の中折れ時において、第三表皮部１３の厚み方向（シート内方）に形成される内部空間である（図４を参照）。
本実施例では、上述の表皮材６Ｓをクッション材６Ｐに張設して、第一表皮部１１と第二表皮部１２（比較的厚み寸法の大きい部位）をクッション材６Ｐに当接させる。そしてシートバック６の中折れ時において、第一表皮部１１と第二表皮部１２がクッション材６Ｐから浮き上がるなどして、第三表皮部１３の裏面側に隙間（シート内方の隙間部１５）が形成される。
そして後述するように、第三表皮部１３をシート内方に弛み変形して、隙間部１５内に収納する。これによりシートバック６の中折れ時において、第三表皮部１３のシート内方への弛み変形を許容することができる。 (Gap)
The gap 15 is an internal space formed in the thickness direction of the third skin portion 13 (inward of the seat) when the seat back 6 is folded (see FIG. 4).
In the present embodiment, the above-described skin material 6S is stretched over the cushion material 6P, and the first skin portion 11 and the second skin portion 12 (parts having relatively large thickness dimensions) are brought into contact with the cushion material 6P. When the seat back 6 is folded, the first skin portion 11 and the second skin portion 12 are lifted from the cushioning material 6P, and the like, and a gap is formed on the back surface side of the third skin portion 13 (a gap portion 15 inside the seat). Is formed.
Then, as will be described later, the third skin portion 13 is slackened and deformed inward of the sheet and stored in the gap portion 15. As a result, when the seat back 6 is folded, slack deformation of the third skin portion 13 toward the inside of the seat can be allowed.

［中折れ動作］
図１及び図４を参照して、シートバック６を、着座姿勢から中折れ姿勢に変位させる。シートバック６を中折れ姿勢にすると、裏面側の表皮材６Ｓが緊張するとともに、着座側の表皮材６Ｓに弛み（いわゆる周長差）が発生する。
そこで本実施例では、第一部位６１に対する第二部位６２の屈曲動作により、第一縫合部２１及び第二縫合部２２（ともに内折り部分）が、着座側から第三表皮部１３をシート内方に向けて押圧する。このときの各縫合部２１，２２の屈曲動作（押圧力）に第三表皮部１３を追従させることで、第三表皮部１３のシート内方への湾曲変形を助長できる。
そして第三表皮部１３（比較的弛みやすい部分）が、シート内方に向けて湾曲状に弛み変形して隙間部１５に収納される。 [Bending operation]
With reference to FIGS. 1 and 4, the seat back 6 is displaced from the sitting posture to the folded posture. When the seat back 6 is in a folded posture, the skin material 6S on the back side is tensioned and slack (so-called circumference difference) occurs in the skin material 6S on the seating side.
Therefore, in the present embodiment, the first stitched portion 21 and the second stitched portion 22 (both inwardly folded) cause the third epidermis portion 13 to move into the seat from the seating side by bending the second portion 62 with respect to the first portion 61. Press towards the direction. By causing the third skin portion 13 to follow the bending operation (pressing force) of the stitching portions 21 and 22 at this time, it is possible to promote the bending deformation of the third skin portion 13 toward the inside of the sheet.
Then, the third skin portion 13 (a portion that is relatively easy to loosen) is loosely deformed in a curved shape toward the inner side of the sheet and is stored in the gap portion 15.

以上説明したとおり、本実施例によれば、弛み変形した第三表皮部１３を隙間部１５に収納することにより、第三表皮部１３の着座側への突出を防止又は低減する。このとき第一縫合部２１及び第二縫合部２２（内折りされて剛性の高められた部分）によって、第三表皮部１３のシート内方への弛み変形が助長される。
このため本実施例によれば、第三表皮部１３のシート内方への弛み変形を許容して、シート中折れ時における表皮材６Ｓの弛みの突出を防止又は低減することができる。
そして表皮材６Ｓの弛みの突出を防止又は低減することにより、シート中折れ時におけるシートの見栄えを向上させることができる。特に本実施例では、シートバック６のサイド部６ｂとカマチ部６ｃ（特に弛みが生じやすい部位）の双方を、帯状の第三表皮部１３（比較的シンプルな構成）でカバーできる。 As described above, according to the present embodiment, the third skin portion 13 that has been loosely deformed is accommodated in the gap portion 15, thereby preventing or reducing the protrusion of the third skin portion 13 toward the seating side. At this time, the first stitched portion 21 and the second stitched portion 22 (the portions that are folded inward and have increased rigidity) promote the loose deformation of the third skin portion 13 toward the inside of the sheet.
For this reason, according to the present embodiment, it is possible to prevent or reduce the slack protrusion of the skin material 6S when the sheet is folded, by allowing the third skin portion 13 to be slackly deformed inward of the sheet.
And the appearance of the sheet | seat at the time of a sheet | seat folding can be improved by preventing or reducing the protrusion of the slack of the skin material 6S. In particular, in the present embodiment, both the side portion 6b and the kamachi portion 6c (particularly where slack is likely to occur) of the seat back 6 can be covered with the belt-like third skin portion 13 (relatively simple configuration).

［変形例１］
本変形例では、熱融着可能なシート材（第一シート材１５ｆ，第二シート材１５ｓ）により、第三表皮部１３のシート内方への湾曲変形を助長する（図６（ａ）を参照）。この種のシート材１５ｆ，１５ｓとして、例えば熱により溶融可能な樹脂シートを例示することができる。
そして本変形例では、第一縫合部２１の内折り端に、第三表皮部１３の下端部を縫着するとともに、第二縫合部２２の内折り端に、第三表皮部１３の上端部を縫着する。つぎに第一縫合部２１の裏面側に、第一シート材１５ｆを熱融着するとともに、第二縫合部２２の裏面側に、シート裏面側から第二シート材１５ｓを熱融着する。
本変形例によれば、第一シート材１５ｆと第二シート材１５ｓによって、各縫合部２１，２２と第三表皮部１３を比較的に強固に一体化することができる。これにより第一縫合部２１と第二縫合部２２の押圧動作に第三表皮部１３がスムーズに追従して、第三表皮部１３のシート内方への湾曲変形を助長することができる。 [Modification 1]
In this modified example, the sheet material (first sheet material 15f, second sheet material 15s) that can be heat-sealed promotes bending deformation of the third skin portion 13 to the inside of the sheet (FIG. 6A). reference). Examples of this type of sheet material 15f, 15s include resin sheets that can be melted by heat.
In this modification, the lower end portion of the third skin portion 13 is sewn to the inner folding end of the first stitching portion 21, and the upper end portion of the third skin portion 13 is stitched to the inner folding end of the second stitching portion 22. Sewing Next, the first sheet material 15 f is heat-sealed to the back surface side of the first stitching portion 21, and the second sheet material 15 s is heat-sealed to the back surface side of the second stitching portion 22 from the sheet back surface side.
According to this modification, the stitching portions 21 and 22 and the third skin portion 13 can be integrated relatively firmly by the first sheet material 15f and the second sheet material 15s. Accordingly, the third skin portion 13 can smoothly follow the pressing operation of the first stitching portion 21 and the second stitching portion 22, and the curved deformation of the third skin portion 13 toward the inside of the sheet can be promoted.

［変形例２］
本変形例では、強固な縫着構造（第一縫着線１６ｆ，第二縫着線１６ｓ）により、第三表皮部１３のシート内方への湾曲変形を助長する（図６（ｂ）を参照）。
すなわち本変形例では、第一縫合部２１において第一表皮部１１と第三表皮部１３を再度縫合する（第一縫着線１６ｆ）。また第二縫合部２２において、第一表皮部１１と第三表皮部１３を再度縫合する（第二縫着線１６ｓ）。
本変形例によれば、第一縫着線１６ｆと第二縫着線１６ｓによって、各縫合部２１，２２と第三表皮部１３を比較的強固に一体化することができる。これにより第一縫合部２１と第二縫合部２２の押圧動作に第三表皮部１３がスムーズに追従して、第三表皮部１３のシート内方への湾曲変形を助長することができる。 [Modification 2]
In this modified example, the strong deformation structure (the first sewing line 16f and the second sewing line 16s) facilitates the bending deformation of the third skin portion 13 to the inside of the sheet (FIG. 6B). reference).
That is, in the present modification, the first skin portion 11 and the third skin portion 13 are stitched again at the first stitching portion 21 (first sewing line 16f). Further, in the second stitching portion 22, the first skin portion 11 and the third skin portion 13 are stitched again (second sewing line 16s).
According to this modification, the stitching portions 21 and 22 and the third skin portion 13 can be integrated relatively firmly by the first sewing line 16f and the second sewing line 16s. Accordingly, the third skin portion 13 can smoothly follow the pressing operation of the first stitching portion 21 and the second stitching portion 22, and the curved deformation of the third skin portion 13 toward the inside of the sheet can be promoted.

［変形例３］
本変形例では、裏材（第一裏材１７ｆ，第二裏材１７ｓ）により、第三表皮部１３のシート内方への湾曲変形を助長する（図６（ｃ）を参照）。裏材として、布帛、皮革及びこれらの複合材を例示できる。
すなわち本変形例では、第一表皮部１１の裏面に第一裏材１７ｆを配置したのち、その上端部を内折り状とする。また第二表皮部１２の裏面に第二裏材１７ｓを配置したのち、その下端部を内折り状とする。
つぎに第一縫合部２１と第一裏材１７ｆ（上端部）の間に第三表皮部１３の下端部を介装したのち、これらを縫着結合する。また第二縫合部２２と第二裏材１７ｓ（下端部）の間に第三表皮部１３の上端部を介装したのち、これらを縫着結合する。 [Modification 3]
In this modified example, the backing material (first backing material 17f, second backing material 17s) facilitates the bending deformation of the third skin portion 13 inward of the sheet (see FIG. 6C). Examples of the backing material include fabric, leather, and composite materials thereof.
That is, in this modification, after arranging the first backing 17f on the back surface of the first skin portion 11, the upper end portion thereof is folded inward. Moreover, after arrange | positioning the 2nd back material 17s on the back surface of the 2nd skin part 12, the lower end part is made into an inward shape.
Next, after the lower end portion of the third skin portion 13 is interposed between the first stitching portion 21 and the first backing material 17f (upper end portion), these are sewn together. Further, after the upper end portion of the third skin portion 13 is interposed between the second stitching portion 22 and the second backing material 17s (lower end portion), these are sewn and joined.

本変形例によれば、第一縫合部２１の剛性が第一裏材１７ｆにて高められるとともに、第二縫合部２２の剛性が第二裏材１７ｓにて高められる。
これにより第一縫合部２１と第二縫合部２２の押圧動作に第三表皮部１３がスムーズに追従して、第三表皮部１３のシート内方への湾曲変形を助長することができる。 According to this modification, the rigidity of the first stitching portion 21 is enhanced by the first backing material 17f, and the rigidity of the second stitching portion 22 is enhanced by the second backing material 17s.
Accordingly, the third skin portion 13 can smoothly follow the pressing operation of the first stitching portion 21 and the second stitching portion 22, and the curved deformation of the third skin portion 13 toward the inside of the sheet can be promoted.

本実施例の車両用シート２は、上述した実施例に限定されるものではなく、その他各種の実施の形態を取り得る。
（１）本実施例では、帯状の第三表皮部１３を例示したが、第三表皮部１３の構成を限定する趣旨ではない。また本実施例では、第三表皮部１３の個数に対応して一対の第三表皮部１３を用いたが、第三表皮部１３が単数である場合には、単数の第三表皮部１３を用いることができる。 The vehicle seat 2 of the present embodiment is not limited to the above-described embodiment, and can take other various embodiments.
(1) In the present embodiment, the band-shaped third skin portion 13 is exemplified, but the configuration of the third skin portion 13 is not intended to be limited. In the present embodiment, a pair of third skin portions 13 is used corresponding to the number of third skin portions 13. However, when the number of third skin portions 13 is singular, a single third skin portion 13 is provided. Can be used.

（２）また本実施例では、サイド部６ｂとカマチ部６ｃの双方を第三表皮部１３によって被覆する例を説明した。本実施例では、サイド部６ｂとカマチ部６ｃの少なくとも一部位を第三表皮部１３によって被覆することができる。
また本実施例のメイン部６ａを第三表皮部で覆うこともできる。この場合には、メイン表皮部１０をシート上下に分割するなどして、第一表皮部と第二表皮部を形成することができる。 (2) In the present embodiment, an example in which both the side portion 6b and the keratin portion 6c are covered with the third skin portion 13 has been described. In the present embodiment, at least a part of the side portion 6b and the kamachi portion 6c can be covered with the third skin portion 13.
Moreover, the main part 6a of a present Example can also be covered with a 3rd skin part. In this case, the first skin portion and the second skin portion can be formed by dividing the main skin portion 10 into the upper and lower portions of the sheet.

（３）また本実施例では、第一表皮部１１と第二表皮部１２の双方に第三表皮部１３を縫合結合する例を説明した。
これとは異なり第一表皮部と第二表皮部のいずれか一方の端部（第一縫合部２１又は第二縫合部２２）によって第三表皮部をシート内側に押圧する構成とすることができる。この場合、前記一方とは異なる他方の端部と第三表皮部の結合手段は特に限定されず、例えば別の縫合形態や、接着等の結合手段を取ることができる。また他方の端部と第三表皮部を一体物として形成することもできる。 (3) In the present embodiment, the example in which the third skin portion 13 is stitched and joined to both the first skin portion 11 and the second skin portion 12 has been described.
Unlike this, it is possible to adopt a configuration in which the third epidermis part is pressed inside the sheet by either one of the first epidermis part and the second epidermis part (the first stitching part 21 or the second stitching part 22). . In this case, the coupling means between the other end portion different from the one and the third skin portion is not particularly limited, and for example, another stitching form or a coupling means such as adhesion can be taken. Further, the other end portion and the third skin portion can be formed as a single body.

（４）また本実施例では、第一縫合部２１と第二縫合部２２を内折して形成する（シンプルな二層構造とする）例を説明したが、各縫合部の構成を限定する趣旨ではない。例えば第一縫合部と第二縫合部を、三層構造などの多層構造とする（三つ折りする又は別の積層体を重層する）こともできる。
（５）また本実施例では、シート材、縫着構造及び裏材等の助長手段により、第三表皮部１３のシート内方への湾曲変形を助長する例を説明したが、助長手段の構成を限定する趣旨ではない。例えば、上記各種の助長手段を適宜組み合わせて使用することができる。
（６）また本実施例では、縫着線ＳＥＷ３（保持手段の一例）により、各縫合部２１，２２の配置状態を保持する例を説明したが、保持手段構成を限定する趣旨ではない。例えばラミネートや接着などの保持手段によって、各縫合部２１，２２の配置状態を保持することができる。 (4) In the present embodiment, the example in which the first stitching portion 21 and the second stitching portion 22 are formed by folding inward (a simple two-layer structure) has been described, but the configuration of each stitching portion is limited. Not the purpose. For example, the first stitched portion and the second stitched portion can be formed into a multilayer structure such as a three-layer structure (tri-folded or layered with another laminate).
(5) In the present embodiment, the example of promoting the bending deformation of the third skin portion 13 to the inside of the sheet by the promoting means such as the sheet material, the sewing structure, and the backing material has been described. It is not intended to limit. For example, the above various facilitating means can be used in appropriate combination.
(6) In the present embodiment, the example in which the arrangement state of the stitching portions 21 and 22 is held by the sewing line SEW3 (an example of the holding unit) has been described, but the configuration of the holding unit is not limited. For example, the arrangement state of the stitched portions 21 and 22 can be held by holding means such as lamination or adhesion.

２車両用シート
４シートクッション
６シートバック
６Ｓ表皮材
６Ｐクッション材
１０メイン表皮部
１１第一表皮部
１２第二表皮部
１３第三表皮部
１５隙間部
３１第一積層体
３２第二積層体
２１第一縫合部
２２第二縫合部
６１第一部位
６２第二部位
2 Vehicle Seat 4 Seat Cushion 6 Seat Back 6S Crust Material 6P Cushion Material 10 Main Skin Part 11 First Skin Part 12 Second Skin Part 13 Third Skin Part 15 Gap Part 31 First Laminate 32 Second Laminate 21 First One suture part 22 Second suture part 61 First part 62 Second part

Claims

In a vehicle seat comprising a seat cushion and a seat back, the seat back having a first part on the seat cushion side and a second part that is flexibly connected to the first part,
A first skin part covering the first part; a second skin part covering the second part; a third skin part connecting the first skin part and the second skin part; Have
The rigidity of the third skin part is set lower than that of the first skin part and the second skin part, and the third skin part is placed in the sheet according to the bending of the second part with respect to the first part. It is configured to store the third skin portion in the gap portion inside the seat while being loosely deformed toward the direction ,
While folding at least one end of the first skin part and the second skin part inward of the seat, the one end part and the third skin part are stitched together by a sewing line. , The third skin part is disposed inward of the sheet from the one end part,
By the bending operation of the second part with respect to the first part, the one end is configured to press the third skin part toward the inside of the sheet,
For a vehicle provided with the following configuration (1) or (2) that strengthens the connection between the one end and the third skin portion as the facilitating means for facilitating the inward bending deformation of the third skin portion . Sheet.
(1) Said one edge part and said 3rd skin part are integrated by the sheet material heat-sealed by these back surfaces.
(2) The one end portion and the third skin portion are stitched and integrated together with the sewing line at another sewing line different from the sewing line.

In a vehicle seat comprising a seat cushion and a seat back, the seat back having a first part on the seat cushion side and a second part that is flexibly connected to the first part,
A first skin part covering the first part; a second skin part covering the second part; a third skin part connecting the first skin part and the second skin part; Have
The rigidity of the third skin part is set lower than that of the first skin part and the second skin part, and the third skin part is placed in the sheet according to the bending of the second part with respect to the first part. It is configured to store the third skin portion in the gap portion inside the seat while being loosely deformed toward the direction,
While folding at least one end of the first skin part and the second skin part inward of the seat, the one end part and the third skin part are stitched together by a sewing line. , The third skin part is disposed inward of the sheet from the one end part,
By the bending operation of the second part with respect to the first part, the one end is configured to press the third skin part toward the inside of the sheet,
A vehicle seat provided with a sheet- like backing material that is arranged in a face-to-face manner on the back surface side of the one end portion and enhances its rigidity as an encouraging means for encouraging the deformation of the third skin portion inward of the seat. .