JP6931234B2 - Seat cushions and manufacturing methods for seat cushions - Google Patents

Seat cushions and manufacturing methods for seat cushions Download PDF

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JP6931234B2
JP6931234B2 JP2018195361A JP2018195361A JP6931234B2 JP 6931234 B2 JP6931234 B2 JP 6931234B2 JP 2018195361 A JP2018195361 A JP 2018195361A JP 2018195361 A JP2018195361 A JP 2018195361A JP 6931234 B2 JP6931234 B2 JP 6931234B2
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cushion
plane
seating
net
dimensional
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JP2020062174A (en
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小野　裕司
裕司 小野
林太郎 竹野
林太郎 竹野
昌之 久保
昌之 久保
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Nippon Seal Co Ltd
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Nippon Seal Co Ltd
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Description

本発明は、主として、鉄道車両、自動車、航空機等の車両用座席において、着座者の臀が着座される座席用クッションに関する。 The present invention mainly relates to a seat cushion in which the buttocks of a seated person are seated in a vehicle seat such as a railroad vehicle, an automobile, or an aircraft.

座席用クッションの技術として、特許文献１はクッション材を開示する。クッション材は、綿状体及び三次元網状体を備え、三次元網状体は直方体に形成される。綿状体は、三次元網状体を包囲するように積層される。
特許文献１では、着座者の臀部を着座する綿状体の着座面、及び三次元網状体の天地面の間の綿厚さは、クッション材の前後方向に不均一な綿厚さである。 As a technique for seat cushions, Patent Document 1 discloses a cushioning material. The cushioning material includes a cotton-like body and a three-dimensional net-like body, and the three-dimensional net-like body is formed into a rectangular parallelepiped. The cotton-like bodies are laminated so as to surround the three-dimensional network-like body.
In Patent Document 1, the cotton thickness between the seating surface of the cotton-like body on which the buttocks of the seated person is seated and the top and bottom of the three-dimensional net-like body is a non-uniform cotton thickness in the front-rear direction of the cushioning material.

特開２０１１−１６７３１９号公報Japanese Unexamined Patent Publication No. 2011-167319

特許文献１は、綿状体の着座面、及び三次元網状材の天地面の間の綿厚さを不均一としているので、着座者の臀部の着座を繰返すと、綿状体にへたりが発生するという問題がある。 In Patent Document 1, the seating surface of the cotton-like body and the cotton thickness between the top and bottom of the three-dimensional net-like material are non-uniform. There is a problem that it occurs.

本発明は、クッション材のへたりを抑制できる車両用クッションを提供することにある。 An object of the present invention is to provide a vehicle cushion capable of suppressing the sagging of a cushion material.

本発明に係る請求項１は、主体繊維及びバインダ繊維が混合された繊維構造体を複数積層して形成されたクッション材と、熱接着性合成樹脂の線条を屈曲してランダムループを形成し、前記線条の接触部を接合してなる三次元立体網状材と、を備え、前記三次元立体網状材は、網材厚さ方向の網材表平面を前記クッション材のクッション厚さ方向のクッション裏平面に当接して、前記クッション材の内側に配置される座席用クッションであって、前記クッション材は、前記クッション厚さ方向のクッション表面の一部が前記クッション厚さ方向に凹んだ着座平面を有し、前記着座平面に対向する前記クッション裏平面の一部の膨出裏平面を前記クッション裏平面から膨出して形成され、着座者の臀部が前記着座平面から着座される着座凹み部を備え、前記着座凹み部は、前記クッション表面及び前記クッション裏平面の一部において、前記着座平面及び前記膨出裏平面の間に略均一なクッション厚さを有して形成され、前記着座平面は、前記クッション表面からクッション裏平面側に傾斜しつつ、前記クッション厚さ方向と直交するクッション前後方向の一方のクッション端側に延在され、前記膨出裏平面は、前記クッション裏平面から前記三次元立体網状材の網材表平面側に傾斜しつつ、一方の前記クッション端側に延在され、前記三次元立体網材は、前記網材表平面の一部が前記網板厚さ方向に凹んで形成され、及び前記膨出裏平面に倣った傾斜平面に形成された網材着座平面を有する網材着座凹み部を備え、前記網材着座平面を除く前記網材表平面を前記膨出表平面を除く前記クッション裏平面に当接し、前記網材着座平面の全面を前記膨出裏平面の全面に当接して、前記クッション材の内側に配置され、前記網材着座平面は、前記網材表平面の一部において、前記三次元立体網状材の前記線条を前記網材厚さ方向の前記網材裏面側に圧縮して形成され、前記網材厚さ方向と直交する網材前後方向において、前記網材表平面の表網材位置から前記網材裏面側に傾斜しつつ、前記網材前後方向の一方の網材端面側に延在され、前記網材前後方向において、前記表網材位置から一方の網材端面側に向けて、段々に前記線条の密度を疎から密にして形成されることを特徴とする座席用クッションである。
 The first aspect of the present invention is to form a random loop by bending a line of a heat-adhesive synthetic resin with a cushioning material formed by laminating a plurality of fiber structures in which a main fiber and a binder fiber are mixed. A three-dimensional three-dimensional net-like material formed by joining the contact portions of the streaks, and the three-dimensional three-dimensional net-like material has a net material surface plane in the net material thickness direction in the cushion thickness direction of the cushion material. in contact with the cushion back plane, a seat cushion disposed inside of the cushion member, the cushion member, a part of the cushion thickness direction of the cushion surface recessed into the cushion thickness direction seating has a planar, said seating plane part of the bulge back plane of the cushion back plane facing formed by bulging from the cushion back plane, the seating recess which buttocks of the seated person is seated from the seating plane wherein the seating recess, said in some cushion surface and the cushion back plane is formed with a substantially uniform cushion thickness between the seating plane and the bulging back plane, the seating plane Is inclined from the cushion surface to the cushion back plane side and extends to one cushion end side in the cushion front-rear direction orthogonal to the cushion thickness direction, and the bulging back plane extends from the cushion back plane to the cushion back plane. while inclining to the network material table plane side of the three-dimensional net-like material, extending in one of said cushion end, the three-dimensional network material, a part of the network material table plane the network plate thickness direction are recessed formed, and the Rise Deura comprising a mesh material seating recess having formed web material seated plane inclined plane that follows the plane, the said network member table plane excluding the network member seating plane Rise abutting said cushion back plane except Dehyo plane, abuts the entire surface of the grid member seating plane on the entire surface of the bulging back plane, are disposed inside the cushion material, the net member seating plane, wherein A net material formed by compressing the streaks of the three-dimensional three-dimensional net material toward the back surface side of the net material in the thickness direction of the net material in a part of the front plane of the net material, and is orthogonal to the thickness direction of the net material. In the front-rear direction, while inclining from the front net material position on the front plane of the net material to the back surface side of the net material, it extends to one end surface side of the net material in the front-rear direction of the net material, and in the front-rear direction of the net material, the said It is a seat cushion characterized in that the streaks are gradually formed from the position of the surface net material toward the end surface side of one of the net materials so that the density of the streaks is gradually reduced from sparse to dense.

本発明に係る請求項２は、前記クッション材は、前記着座平面及び前記膨出裏平面の間において、前記繊維構造体を前記クッション厚さ方向に複数積層して形成され、又は前記着座平面及び前記膨出裏平面の間において、前記繊維構造体を前記クッション前後方向に複数積載して形成されることを特徴とする請求項１に記載の座席用クッションである。
According to the second aspect of the present invention, the cushion material is formed by laminating a plurality of the fiber structures in the cushion thickness direction between the seating plane and the bulging back plane , or the seating plane and the seating plane. The seat cushion according to claim 1, wherein a plurality of the fiber structures are stacked in the front-rear direction of the cushion between the bulging back planes.

本発明に係る請求項３は、主体繊維及びバインダ繊維が混合された繊維構造体を複数積層して繊維構造シートを形成する第１工程と、前記繊維構造シートのシート厚さ方向のシート表平面及びシート裏平面から型押しして、前記繊維構造シートに原型シートを成形する工程であって、矩形状の着座側クッション部、前記着座側クッション部のクッション前後方向の各クッション端に沿って前記着座側クッション部に連続する前側及び後側クッション部、前記着座側クッション部の前記クッション前後方向と直交するクッション幅方向の各クッション端に沿って前記着座側クッション部に連続する左側及び右側クッション部を、前記繊維構造シートに型押しし、前記着座側クッション部のクッション厚さ方向のクッション表平面の一部の着座平面を前記クッション厚さ方向に凹ませ、前記着座平面に対向するクッション裏平面の一部の膨出裏平面を前記着座側クッション部の前記クッション裏平面から膨出する着座凹み部を、前記繊維構造シートに型押しし、前記着座平面及び前記膨出裏平面の間に略均一なクッション厚さを有して前記着座凹み部を、前記繊維構造シートに型押しし、前記着座側クッション部の前記クッション表平面から前記クッション裏平面側に傾斜しつつ、前記着座側クッション部の前記クッション前後方向の一方のクッション端側に延在する前記着座平面を、前記繊維構造シートに型押しし、前記着座側クッション部の前記クッション裏平面から傾斜しつつ、前記クッション前後方向の一方のクッション端側に延在する前記膨出裏平面を、前記繊維構造シートに型押しして、前記原型シートを前記繊維構造シートに形成する第２工程と、熱接着性合成樹脂の線条を屈曲してランダムループを形成し、前記線条の接触部を接合してなる三次元立体網状材であって、前記三次元立体網状材の網材厚さ方向の網材表平面の一部において、前記線条を前記網材厚さ方向の網材裏平面側に熱圧縮して前記膨出裏平面に倣った網材着座平面を有する網材着座凹み部を、前記三次元立体網状材に形成する第３工程と、前記繊維構造シートから前記原型シートを切離して、クッション原型シートを形成する第４工程と、前記三次元立体網状材の前記網材着座平面を除く前記網材表平面を、前記着座側クッション部の前記膨出裏平面を除く前記クッション裏平面に当接し、前記網材着座平面の全面を前記膨出裏平面の全面に当接すると共に、前記三次元立体網状材の前記網材厚さ方向と直交する網材前後方向及び網材幅方向の各網材端面を前記着座側クッション部の各クッション端に沿わせて、前記三次元立体網状材を前記クッション原型シートの前記着座側クッション部に積層する第５工程と、前記三次元立体網状材を積層した前記クッション原型シートにおいて、前記前側クッション部、前記後側クッション部、前記左側クッション部及び前記右側クッション部を、前記クッション原型シートの前記着座側クッション部の前記クッション裏平面側に折曲げて、前記三次元立体網状材の前記各網材端面に当接する第６工程と、前記クッション裏平面側に折曲げた前記前側クッション部と、前記クッション裏平面側に折曲げた前記左側及び右側クッション部を接着固定する第７工程と、を含んでなることを特徴とする座席用クッションの製造方法である。
Claim 3 according to the present invention includes a first step of laminating a plurality of fiber structures in which a main fiber and a binder fiber are mixed to form a fiber structure sheet, and a sheet surface plane of the fiber structure sheet in the sheet thickness direction. And, in the step of molding the prototype sheet into the fiber structure sheet by embossing from the back plane of the seat, the rectangular seating side cushion portion and the seating side cushion portion along the cushion ends in the front-rear direction of the cushion. Front and rear cushions continuous with the seating side cushion, left and right cushions continuous with the seating side cushion along each cushion end in the cushion width direction orthogonal to the cushion front-rear direction of the seating side cushion Is embossed on the fiber structure sheet, a part of the seating plane of the cushion front plane in the cushion thickness direction of the seating side cushion portion is recessed in the cushion thickness direction, and the cushion back plane facing the seating plane. A seating recess that bulges a part of the bulging back plane from the cushion back plane of the seating side cushion portion is embossed on the fiber structure sheet, and is substantially between the seating plane and the bulging back plane. With a uniform cushion thickness, the seating recess is embossed on the fiber structure sheet, and the seating side cushion portion is inclined from the cushion front plane to the cushion back plane side of the seating side cushion portion. The seating plane extending to one cushion end side in the cushion front-rear direction is embossed on the fiber structure sheet, and the seating side cushion portion is inclined from the cushion back plane in the cushion front-rear direction. The second step of embossing the bulging back plane extending to the end side of the cushion onto the fiber structure sheet to form the prototype sheet on the fiber structure sheet, and the lines of the heat-adhesive synthetic resin. A three-dimensional three-dimensional net-like material formed by bending to form a random loop and joining the contact portions of the streaks, and in a part of the net material surface plane in the net material thickness direction of the three-dimensional three-dimensional net-like material. , The wire is heat-compressed to the back plane side of the net material in the thickness direction of the net material, and the net material seating recess having the net material seating plane following the bulging back plane is formed into the three-dimensional three-dimensional net-like material. The third step of forming, the fourth step of separating the prototype sheet from the fiber structure sheet to form the cushion prototype sheet, and the net material surface plane excluding the net material seating plane of the three-dimensional three-dimensional net-like material. , The seating side cushion portion abuts on the cushion back plane excluding the bulging back plane, and the entire surface of the net material seating plane is the entire surface of the bulging back plane. The end faces of the net material in the front-rear direction and the width direction of the net material, which are orthogonal to the thickness direction of the net material of the three-dimensional three-dimensional net-like material, are aligned with each cushion end of the seating side cushion portion. In the fifth step of laminating the three-dimensional net-like material on the seating side cushion portion of the cushion prototype sheet and the cushion prototype sheet on which the three-dimensional three-dimensional net-like material is laminated, the front side cushion portion and the rear side cushion portion. The left side cushion portion and the right side cushion portion are bent toward the back plane side of the cushion of the seating side cushion portion of the cushion prototype sheet, and abut on the end faces of the respective net materials of the three-dimensional three-dimensional net-like material. a step, and the front cushion part is bent into the cushion back plane side, and a seventh step of bonding and fixing the left and right cushion portion is bent into the cushion back plane side, and characterized in that it comprises a This is a method of manufacturing a seat cushion.

本発明に係る請求項１では、クッション材の着座凹み部は、着座面及び膨出裏面の間に略均一なクッション厚さを有して形成される。着座平面はクッション表平面からクッション裏平面に傾斜しつつクッション前後方向の一方のクッション端側に延在され、膨出裏面は、クッション裏平面から傾斜しつつクッション前後方向の一方のクッション端側に延在される。三次元立体網状材は、膨出裏面に倣った傾斜面に形成された網材着座凹み部を備え、網材着座面を除く網材表平面を膨張裏面を除くクッション裏平面に当接し、網材着座面の全面を膨出裏面の全面に当接して、クッション材の内側に配置される。三次元立体網状材において、網材着座面は、網材表平面の一部において、線条を網材裏平面側に圧縮（熱圧縮／加熱圧縮等）して形成される。
クッション材において、着座面及び膨出裏面は、相互の間に略均一なクッション厚さを有して、一方のクッション端側に延在され、及び三次元立体網状材において、網材着座面は膨出裏面に倣って当接しつつ一方の網材端側に延在される。
三次元立体網状材において、網材着座面は、網材前後方向において、一方の網材端側に向けて、段々（徐々）に線条の密度を疎から密にして形成される。網材着座面は、網材前後方向の一方の網材端側で線条の密度を最大として形成される。これにより、三次元立体網状材において、網材着座面は、網材前後方向において、一方の網材端側に向けて、段々（徐々）に線条の弾性力（バネ力／バネ定数）を低から高にして形成され、一方の網材端側で最大の弾性力（バネ力／バネ定数）となる。
着座者は、両大腿部をクッション材のクッション前後方向の他方のクッション端側に向けて、臀部を着座面に当接して着座凹み部に着座する。
これにより、三次元立体網状材は、着座者の臀部が着座される側で最大の弾性力（バネ力／バネ定数）とできるの、着座面及び膨出裏面の間のクッション材のへたりを抑制でき、座り心地の良い座席用クッションとなる。 In claim 1 of the present invention, the seating recessed portion of the cushioning material is formed to have a substantially uniform cushion thickness between the seating surface and the bulging back surface. The seating plane extends from the front plane of the cushion to the back plane of the cushion and extends to one end side of the cushion in the front-rear direction of the cushion, and the back surface of the bulge extends from the back plane of the cushion to one end side of the cushion in the front-rear direction of the cushion. It is postponed. The three-dimensional three-dimensional net-like material is provided with a net material seating recess formed on an inclined surface that imitates the bulging back surface, and the net material front plane excluding the net material seating surface is in contact with the cushion back plane excluding the expanding back surface. The entire surface of the material seating surface is brought into contact with the entire surface of the bulging back surface, and is arranged inside the cushion material. In the three-dimensional three-dimensional net-like material, the net material seating surface is formed by compressing (heat compression / heat compression, etc.) the streaks toward the back plane side of the net material in a part of the front plane of the net material.
In the cushion material, the seating surface and the bulging back surface have a substantially uniform cushion thickness between each other and extend to one cushion end side, and in the three-dimensional three-dimensional net-like material, the net material seating surface is It extends to one end side of the net material while abutting following the back surface of the bulge.
In the three-dimensional three-dimensional net-like material, the net material seating surface is formed by gradually (gradually) increasing the density of the streaks toward one end side of the net material in the front-rear direction of the net material. The net material seating surface is formed on one end side of the net material in the front-rear direction of the net material with the maximum density of streaks. As a result, in the three-dimensional three-dimensional net-like material, the net material seating surface gradually (gradually) applies the elastic force (spring force / spring constant) of the streaks toward the end side of one of the net materials in the front-rear direction of the net material. It is formed from low to high, and has the maximum elastic force (spring force / spring constant) on one end side of the net material.
The seated person sits on the seating recess with both thighs facing the other cushion end side of the cushion material in the front-rear direction of the cushion and the buttocks in contact with the seating surface.
As a result, the three-dimensional three-dimensional net-like material can have the maximum elastic force (spring force / spring constant) on the side where the buttocks of the seated person are seated, so that the cushioning material between the seating surface and the bulging back surface is settled. It can be suppressed and becomes a comfortable seat cushion.

本発明に係る請求項２では、繊維構造体の積層方向（クッション前後方向又はクッション厚さ方向）、及び繊維構造体の積層数を適宜、選択することで、クッション材のクッション性（弾性力）を調整できる。 In claim 2 according to the present invention, the cushioning property (elastic force) of the cushion material is obtained by appropriately selecting the stacking direction of the fiber structures (front-back direction of the cushion or the thickness direction of the cushion) and the number of layers of the fiber structures. Can be adjusted.

本発明に係る請求項３では、請求項１に記載の効果に加えて、クッション材を展開した原型シートを繊維構造シートに型押しして、繊維構造シートから原型シートを切離（裁断等）して、クッション原型シートを形成する（第２工程及び第３工程）。
これにより、クッション材を金型にて熱成形するに比して、精度良く形成でき、クッション材の外観仕上がりも向上できる。 In claim 3 according to the present invention, in addition to the effect according to claim 1, the prototype sheet in which the cushioning material is developed is embossed on the fiber structure sheet, and the prototype sheet is cut (cut, etc.) from the fiber structure sheet. Then, the cushion prototype sheet is formed (second step and third step).
As a result, the cushion material can be formed with higher accuracy than thermoforming with a mold, and the appearance finish of the cushion material can be improved.

座席用クッションの表側斜視図である。It is a front side perspective view of a seat cushion. 座席用クッションの裏側斜視図である。It is the back side perspective view of the seat cushion. 座席用クッションの表面図（上面図）である。It is a surface view (top view) of a seat cushion. 座席用クッションの左側面図である。It is a left side view of a seat cushion. 座席用クッションの前側面図である。It is a front side view of a seat cushion. 座席用クッションの後側面図である。It is a rear side view of a seat cushion. 座席用クッションの裏面図（下面図）である。It is a back view (bottom view) of the seat cushion. 図３のＡ−Ａ断面拡大図であって、繊維構造体をクッション前後方向に複数積層した図である。FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG. 3, which is a view in which a plurality of fiber structures are laminated in the front-rear direction of the cushion. 図３のＢ−Ｂ断面拡大図である。FIG. 3 is an enlarged cross-sectional view taken along the line BB of FIG. 座席用クッションであって、バネ受け材を除いた裏面図（下面図）である。It is a back view (bottom view) of the seat cushion excluding the spring receiving material. 座席用クッションを示す図であって、クッション材、三次元立体網状材、及びバネ受け材を示す表側分解斜視図である。It is a figure which shows the cushion for a seat, and is the front side exploded perspective view which shows a cushion material, a three-dimensional three-dimensional net-like material, and a spring receiving material. 座席用クッションを示す図であって、クッション材、三次元立体網状材、及びバネ受け材を示す裏側分解斜視図である。It is a figure which shows the cushion for a seat, and is the back side exploded perspective view which shows a cushion material, a three-dimensional three-dimensional net-like material, and a spring receiving material. クッション材を示す表側斜視図である。It is a front side perspective view which shows the cushion material. クッション材を示す裏側斜視図である。It is a back side perspective view which shows the cushion material. クッション材を示す表面図（上面図）である。It is a surface view (top view) which shows the cushion material. クッション材を示す裏面図（下面図）である。It is a back view (bottom view) which shows the cushion material. クッション材を示す左側面図である。It is a left side view which shows the cushion material. 図１５のＣ−Ｃ断面拡大図である。FIG. 15 is an enlarged cross-sectional view taken along the line CC of FIG. 図１５のＤ−Ｄ断面拡大図である。FIG. 15 is an enlarged cross-sectional view taken along the line DD of FIG. 三次元立体網状材を示す表側斜視図である。It is a front side perspective view which shows the three-dimensional three-dimensional net-like material. 三次元立体網状材を示す裏側斜視図である。It is a back side perspective view which shows the three-dimensional three-dimensional net-like material. 三次元立体網状材を示す表面図（上面図）である。It is a surface view (top view) which shows the three-dimensional three-dimensional net-like material. 図２２のＥ−Ｅ断面拡大図である。FIG. 22 is an enlarged cross-sectional view taken along the line EE of FIG. 図２２のＦ−Ｆ断面拡大図である。FIG. 22 is an enlarged cross-sectional view taken along the line FF of FIG. バネ受け材（網受け材）を示す表側斜視図である。It is a front side perspective view which shows the spring receiving material (net receiving material). バネ受け材を示す裏側斜視図である。It is a back side perspective view which shows the spring receiving material. バネ受け材を示す表面図（上面図）である。It is a surface view (top view) which shows the spring receiving material. バネ受け材を示す前面図である。It is a front view which shows the spring receiving material. バネ受け材を示す後面図である。It is a rear view which shows the spring receiving material. バネ受け材を示す裏面図（下面図）である。It is a back view (bottom view) which shows the spring receiving material. バネ受け材を示す右側面図である。It is a right side view which shows the spring receiving material. 図２７のＧ−Ｇ断面図である。FIG. 27 is a cross-sectional view taken along the line GG of FIG. 27. 図３のＡ−Ａ断面拡大図であって、繊維構造体をクッション厚さ方向に複数積層した図である。FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG. 3, which is a view in which a plurality of fiber structures are laminated in the cushion thickness direction. 座席用クッションの製造方法において、第１工程の繊維構造シートを示す表面図（上面図）である。It is a surface view (top view) which shows the fiber structure sheet of the 1st step in the manufacturing method of a seat cushion. 座席用クッションの製造方法において、第１工程の繊維構造シートを示す側面図である。It is a side view which shows the fiber structure sheet of the 1st process in the manufacturing method of a seat cushion. 図３４のＨ−Ｈ断面図であって、繊維構造体をシート前後方向に複数積層した図である。FIG. 34 is a cross-sectional view taken along the line HH of FIG. 34, in which a plurality of fiber structures are laminated in the front-rear direction of the sheet. 図３４のＨ−Ｈ断面図であって、繊維構造体をシート幅方向に複数積層した図である。FIG. 34 is a cross-sectional view taken along the line HH of FIG. 34, in which a plurality of fiber structures are laminated in the sheet width direction. 座席用クッションの製造方法において、第２工程の原型シートを示す表面図（上面図）である。It is a surface view (top view) which shows the prototype seat of the 2nd process in the manufacturing method of a seat cushion. 座席用クッションの製造方法において、第２工程の原型シートを示す裏面図（下面図）である。It is a back view (bottom view) which shows the prototype seat of the 2nd process in the manufacturing method of a seat cushion. 座席用クッションの製造方法において、第３工程のクッション原型シートを示す表面図（上面図）である。It is a surface view (top view) which shows the cushion prototype seat of the 3rd process in the manufacturing method of a seat cushion. 座席用クッションの製造方法において、第３工程のクッション原型シートを示す裏面図（下面図）である。It is a back view (bottom view) which shows the cushion prototype seat of the 3rd process in the manufacturing method of a seat cushion. 座席用クッションの製造方法において、第３工程のクッション原型シートを示す側面図である。It is a side view which shows the cushion prototype seat of the 3rd process in the manufacturing method of a seat cushion. 座席用クッションの製造方法において、第４工程のクッション原型シート及び三次元立体網状材を示す裏面図（下面図）である。It is a back view (bottom view) which shows the cushion prototype seat and the three-dimensional three-dimensional net-like material of the 4th process in the manufacturing method of a seat cushion. 座席用クッションの製造方法において、第４工程のクッション原型シート及び三次元立体網状材を示す側面図である。It is a side view which shows the cushion prototype seat and the three-dimensional three-dimensional net-like material of the 4th process in the manufacturing method of the seat cushion. 図４３のＪ−Ｊ断面拡大図である。FIG. 4 is an enlarged cross-sectional view taken along the line JJ of FIG. 43. 座席用クッションの製造方法において、第５工程及び第６工程のクッション原型シート（クッション材）及び三次元立体網状材を示す裏面図（下面図）である。It is a back view (bottom view) which shows the cushion prototype seat (cushion material) and the three-dimensional three-dimensional net-like material of the 5th process and the 6th process in the manufacturing method of a seat cushion. 座席用クッションの製造方法において、第５工程及び第６工程のクッション原型シート（クッション材）を示す側面図である。It is a side view which shows the cushion prototype seat (cushion material) of the 5th process and the 6th process in the manufacturing method of a seat cushion.

本発明に係る座席用クッション、及び座席用クッションの製造方法について、図１乃至図４７を参照して説明する。 A seat cushion according to the present invention and a method for manufacturing the seat cushion will be described with reference to FIGS. 1 to 47.

先ず、本発明に係る座席用クッションについて、図１乃至図３３を参照して説明する。 First, the seat cushion according to the present invention will be described with reference to FIGS. 1 to 33.

図１乃至図３３において、座席用クッションＸ（座席用クッションパッド）は、例えば、鉄道車両の車両用座席の着座側（着座者の臀部を着座する側）に使用される。
座席用クッションＸは、図１乃至図３３に示すように、クッション材１、三次元立体網状材２、及びバネ受け材３（網受け材）を備える。 In FIGS. 1 to 33, the seat cushion X (seat cushion pad) is used, for example, on the seating side (the side on which the buttocks of the seated person are seated) of the vehicle seat of a railway vehicle.
As shown in FIGS. 1 to 33, the seat cushion X includes a cushion material 1, a three-dimensional three-dimensional net-like material 2, and a spring receiving material 3 (net receiving material).

クッション材１は、図１乃至図１９に示すように、主体繊維及びバインダ繊維が混合された繊維構造体４を複数積層して形成される。 As shown in FIGS. 1 to 19, the cushion material 1 is formed by laminating a plurality of fiber structures 4 in which main fibers and binder fibers are mixed.

繊維構造体４は、主体繊維及びバインダ繊維を混合した固綿（板状繊維要素又は繊維構造シート）であって、例えば、ポリエステル固綿で構成される。
繊維構造体４において、固綿は、熱接着性合成繊維（例えば、熱可塑性合成繊維）の主体繊維及びバインダ繊維を混合してなり、ポリエステル固綿は、主体繊維にポリエステル繊維、及びバインダ繊維に低融点ポリエステル繊維を混合してなる混紡綿である。
なお、繊維構造体４の主体繊維は、ポリエステル繊維に限定されず、又は繊維構造体４のバインダ繊維は、低融点ポリエステル繊維に限定されない。
繊維構造体４において、主体繊維及びバインダ繊維は、例えば、４０：６０の重量比率で混合される。 The fiber structure 4 is a solid cotton (plate-shaped fiber element or fiber structure sheet) in which a main fiber and a binder fiber are mixed, and is composed of, for example, polyester solid cotton.
In the fiber structure 4, the solid cotton is made by mixing the main fiber and the binder fiber of the heat-adhesive synthetic fiber (for example, thermoplastic synthetic fiber), and the polyester solid cotton is the main fiber and the polyester fiber and the binder fiber. It is a blended cotton made by mixing low melting point polyester fibers.
The main fiber of the fiber structure 4 is not limited to the polyester fiber, or the binder fiber of the fiber structure 4 is not limited to the low melting point polyester fiber.
In the fiber structure 4, the main fiber and the binder fiber are mixed, for example, in a weight ratio of 40:60.

クッション材１は、図１乃至図１９に示すように、着座側クッション部５、前側クッション部６、後側クッション部７（背側クッション部）、左側クッション部８及び右側クッション部９を備える。
クッション材１は、図３、図１５及び図１６に示すように、例えば、クッション幅方向ＣＨにおいて、着座側クッション部５のクッション幅中心線Ｃｆ（クッション材１のクッション幅中心線Ｃｆ）を境として対称（左右対称）に形成される。なお、クッション幅方向ＣＨは、クッション材１のクッション左右方向である。 As shown in FIGS. 1 to 19, the cushion material 1 includes a seating side cushion portion 5, a front side cushion portion 6, a rear side cushion portion 7 (dorsal side cushion portion), a left side cushion portion 8 and a right side cushion portion 9.
As shown in FIGS. 3, 15 and 16, for example, the cushion material 1 is bounded by the cushion width center line Cf of the seating side cushion portion 5 (cushion width center line Cf of the cushion material 1) in the cushion width direction CH. Is formed symmetrically (symmetrically). The cushion width direction CH is the left-right direction of the cushion of the cushion material 1.

着座側クッション部５は、図１、図３乃至図６、図８、図９、図１１、及び図１３乃至図１８に示すように、着座側クッション部５のクッション厚み方向ＣＴにおいて、クッション表平面５Ａ（クッション表面）、及びクッション裏平面５Ｂ（クッション裏面）を有し、例えば、矩形状の固綿（正方形又は長方形の板状綿要素）に形成される。 As shown in FIGS. 1, 3, 6, 8, 9, 11, and 13 to 18, the seating side cushion portion 5 has a cushioning surface in the cushion thickness direction CT of the seating side cushion portion 5. It has a flat surface 5A (cushion surface) and a cushion back surface 5B (cushion back surface), and is formed of, for example, rectangular solid cotton (square or rectangular plate-shaped cotton element).

前側クッション部６は、図１乃至図１８に示すように、クッション厚さ方向ＣＴ及びクッション幅方向ＣＨと直交するクッション前後方向ＣＦにおいて、着座側クッション部５の他方のクッション端５Ｃ（クッション前端５Ｃ）に連続して、着座側クッション部５に一体に形成される。前側クッション部６は、クッション厚さ方向ＣＴにおいて、着座側クッション部５と直交して延在される。前側クッション部６は、クッション厚さ方向ＣＴにおいて、着座側クッション部５の一方のクッション端５Ｃ（クッション前端５Ｃ）から着座側クッション部５のクッション裏平面５Ｂ側（クッション裏面側）に突出される。
前側クッション部６は、クッション厚さ方向ＣＨにクッション長さ：ＫＡ（クッション高さ）を有して、クッション端５Ｃ（クッション前端５Ｃ）から突出される。
前側クッション部６は、クッション幅方向ＣＨにおいて、着座側クッション部５の各クッション端５Ｅ，５Ｆ（クッション左端５Ｅ，クッション右端５Ｆ）の間に延在される。
これにより、前側クッション部６は、クッション前後方向ＣＦにおいて、クッション外側平面６Ａ及びクッション内側平面６Ｂを有する。
なお、クッション厚さ方向ＣＴは、クッション幅方向ＣＨ及びクッション前後方向ＣＦと直交するクッション上下方向であって、着座側クッション部５のクッション厚さ方向である。 As shown in FIGS. 1 to 18, the front cushion portion 6 has a cushion end 5C (cushion front end 5C) of the seating side cushion portion 5 in the cushion front-rear direction CF orthogonal to the cushion thickness direction CT and the cushion width direction CH. ), It is integrally formed with the seating side cushion portion 5. The front cushion portion 6 extends orthogonally to the seating side cushion portion 5 in the cushion thickness direction CT. The front side cushion portion 6 is projected from one cushion end 5C (cushion front end 5C) of the seating side cushion portion 5 to the cushion back plane 5B side (cushion back surface side) of the seating side cushion portion 5 in the cushion thickness direction CT. ..
The front cushion portion 6 has a cushion length: KA (cushion height) in the cushion thickness direction CH, and is projected from the cushion end 5C (cushion front end 5C).
The front cushion portion 6 extends between the cushion ends 5E and 5F (cushion left end 5E, cushion right end 5F) of the seating side cushion portion 5 in the cushion width direction CH.
As a result, the front cushion portion 6 has the cushion outer plane 6A and the cushion inner plane 6B in the cushion front-rear direction CF.
The cushion thickness direction CT is the cushion vertical direction orthogonal to the cushion width direction CH and the cushion front-rear direction CF, and is the cushion thickness direction of the seating side cushion portion 5.

後側クッション部７は、図１乃至図４、図６乃至図８、及び図１０乃至図１９に示すように、クッション前後方向ＣＦにおいて、着座側クッション部５の一方のクッション端５Ｄ（クッション後端５Ｄ）に連続して、着座側クッション部５に一体に形成される。後側クッション部７は、クッション前後方向ＣＦにおいて、前側クッション部６に間隔を隔てて並設される。後側クッション部７は、クッション厚さ方向ＣＴ（着座側クッション部５のクッション厚さ方向）において、着座側クッション部５と直交して延在される。後側クッション部７は、クッション厚さ方向ＣＴにおいて、前側クッション部６と同一方向に延在される。後側クッション部７は、クッション厚さ方向ＣＴにおいて、着座側クッション部５の他方のクッション端５Ｄ（クッション後端５Ｄ）から着座側クッション部５のクッション裏平面５Ｂ側に突出される。
後側クッション部７は、クッション厚さ方向ＣＨにクッション長さ：ＫＢ（クッション高さ）を有して、クッション端５Ｄ（クッション後端５Ｄ）から突出される。後側クッション部７のクッション長さ：ＫＢは、前側クッション部６のクッション長さ：ＫＡより短い長さである（低い高さである）。
後側クッション部７は、クッション幅方向ＣＨにおいて、着座側クッション部５の各クッション端５Ｅ，５Ｆ（クッション左端５Ｅ，クッション右端５Ｆ）の間に延在される。
これにより、後側クッション部７は、クッション前後方向ＣＦにおいて、クッション外側面７Ａ及びクッション内側平面７Ｂを有する。 As shown in FIGS. 1 to 4, 6 to 8, and 10 to 19, the rear cushion portion 7 has one cushion end 5D (after cushioning) of the seating side cushion portion 5 in the cushion front-rear direction CF. It is integrally formed with the seating side cushion portion 5 continuously with the end 5D). The rear cushion portion 7 is arranged side by side with the front cushion portion 6 at intervals in the CF in the front-rear direction of the cushion. The rear cushion portion 7 extends orthogonally to the seating side cushion portion 5 in the cushion thickness direction CT (cushion thickness direction of the seating side cushion portion 5). The rear cushion portion 7 extends in the same direction as the front cushion portion 6 in the cushion thickness direction CT. The rear cushion portion 7 projects from the other cushion end 5D (cushion rear end 5D) of the seating side cushion portion 5 to the cushion back plane 5B side of the seating side cushion portion 5 in the cushion thickness direction CT.
The rear cushion portion 7 has a cushion length: KB (cushion height) in the cushion thickness direction CH, and is projected from the cushion end 5D (cushion rear end 5D). The cushion length of the rear cushion portion 7: KB is shorter than the cushion length of the front cushion portion 6: KA (it is a lower height).
The rear cushion portion 7 extends between the cushion ends 5E and 5F (cushion left end 5E, cushion right end 5F) of the seating side cushion portion 5 in the cushion width direction CH.
As a result, the rear cushion portion 7 has the cushion outer surface 7A and the cushion inner flat surface 7B in the cushion front-rear direction CF.

左側クッション部８は、図１乃至図１９に示すように、クッション幅方向ＣＨにおいて、着座側クッション部の一方のクッション端５Ｅ（クッション左端５Ｅ）に連続して、着座側クッション部５に一体に形成される。左側クッション部８は、クッション厚さ方向ＣＴ（着座側クッション部５のクッション厚さ方向）において、着座側クッション部５と直交して延在される。左側クッション部８は、クッション厚さ方向ＣＴにおいて、前側クッション部６及び後側クッション部７と同一方向に延在される。左側クッション部８は、クッション厚さ方向ＣＴにおいて、着座側クッション部５の一方のクッション端５Ｅ（クッション左端５Ｅ）から着座側クッション部５のクッション裏平面５Ｂ側に突出される。
左側クッション部８は、クッション厚さ方向ＣＴに、前側クッション部６と同一のクッション長さ：ＫＡ（クッション高さ）を有して、クッション端５Ｅ（クッション左端５Ｅ）から突出される。
左側クッション部８は、クッション前後方向ＣＦにおいて、着座側クッション部５の各クッション端５Ｃ，５Ｄ（クッション前端５Ｃ，クッション後端５Ｄ）の間に延在され、前側クッション部６及び後側クッション部７と一体にして固定される。
これにより、左側クッション部８は、クッション幅方向ＣＨにおいて、クッション外側平面８Ａ及びクッション内側平面８Ｂを有する。 As shown in FIGS. 1 to 19, the left side cushion portion 8 is continuous with one cushion end 5E (cushion left end 5E) of the seating side cushion portion in the cushion width direction CH and is integrally integrated with the seating side cushion portion 5. It is formed. The left side cushion portion 8 extends orthogonally to the seating side cushion portion 5 in the cushion thickness direction CT (the cushion thickness direction of the seating side cushion portion 5). The left side cushion portion 8 extends in the same direction as the front side cushion portion 6 and the rear side cushion portion 7 in the cushion thickness direction CT. The left side cushion portion 8 projects from one cushion end 5E (cushion left end 5E) of the seating side cushion portion 5 to the cushion back plane 5B side of the seating side cushion portion 5 in the cushion thickness direction CT.
The left side cushion portion 8 has the same cushion length: KA (cushion height) as the front side cushion portion 6 in the cushion thickness direction CT, and is projected from the cushion end 5E (cushion left end 5E).
The left cushion portion 8 extends between the cushion ends 5C and 5D (cushion front end 5C, cushion rear end 5D) of the seating side cushion portion 5 in the cushion front-rear direction CF, and the front cushion portion 6 and the rear cushion portion 8 It is fixed together with 7.
As a result, the left side cushion portion 8 has the cushion outer plane 8A and the cushion inner plane 8B in the cushion width direction CH.

右側クッション部９は、図１乃至図３、図５乃至図７、図９乃至図１６、及び図１９に示すように、左側クッション部８と同一形状に形成される。右側クッション部９は、クッション幅方向ＣＨにおいて、着座側クッション部５の他方のクッション端５Ｆ（クッション右端５Ｆ）に連続して、着座側クッション部５に一体に形成される。右側クッション部９は、クッション幅方向ＣＨにおいて、左側クッション部８に間隔を隔てて並設される。右側クッション部９は、クッション厚さ方向ＣＴ（着座側クッション部５のクッション厚さ方向）において、着座側クッション部５と直交して延在される。右側クッション部９は、クッション厚さ方向ＣＴにおいて、前側クッション部６、後側クッション部７及び左側クッション部８と同一方向に延在される。右側クッション部９は、クッション厚さ方向ＣＴにおいて、着座側クッション部５の他方のクッション端５Ｆ（クッション右端５Ｆ）から着座側クッション部５のクッション裏平面５Ｂ側に突出される。
右側クッション部９は、クッション厚さ方向ＣＴに、前側クッション部６と同一のクッション長さ：ＬＡ（クッション高さ）を有して、クッション端５Ｆ（クッション右端５Ｆ）から突出される。
右側クッション部９は、クッション前後方向ＣＦにおいて、着座側クッション部５の各クッション端５Ｃ，５Ｄ（クッション前端５Ｃ，クッション後端５Ｄ）の間に延在されて、前側クッション部６及び後側クッション部７と一体にして固定される。
これにより、右側クッション部９は、クッション幅方向ＣＨにおいて、クッション外側平面９Ａ及びクッション内側平面９Ｂを有する。 The right cushion portion 9 is formed in the same shape as the left cushion portion 8 as shown in FIGS. 1 to 3, 5 to 7, 9 to 16 and 19. The right side cushion portion 9 is integrally formed with the seating side cushion portion 5 in the cushion width direction CH, continuous with the other cushion end 5F (cushion right end 5F) of the seating side cushion portion 5. The right side cushion portion 9 is arranged side by side with the left side cushion portion 8 at intervals in the cushion width direction CH. The right side cushion portion 9 extends orthogonally to the seating side cushion portion 5 in the cushion thickness direction CT (cushion thickness direction of the seating side cushion portion 5). The right side cushion portion 9 extends in the same direction as the front side cushion portion 6, the rear side cushion portion 7, and the left side cushion portion 8 in the cushion thickness direction CT. The right side cushion portion 9 projects from the other cushion end 5F (cushion right end 5F) of the seating side cushion portion 5 to the cushion back plane 5B side of the seating side cushion portion 5 in the cushion thickness direction CT.
The right side cushion portion 9 has the same cushion length: LA (cushion height) as the front side cushion portion 6 in the cushion thickness direction CT, and is projected from the cushion end 5F (cushion right end 5F).
The right cushion portion 9 extends between the cushion ends 5C and 5D (cushion front end 5C, cushion rear end 5D) of the seating side cushion portion 5 in the cushion front-rear direction CF, and extends between the front cushion portion 6 and the rear cushion. It is fixed integrally with the portion 7.
As a result, the right side cushion portion 9 has the cushion outer flat surface 9A and the cushion inner flat surface 9B in the cushion width direction CH.

クッション材１は、図１、図３、図８乃至図１６、図１８及び図１９に示すように、網材収納凹所１０、及び着座凹み部１５を備える。 As shown in FIGS. 1, 8, 16 and 18, 18 and 19, the cushion material 1 includes a net material storage recess 10 and a seating recess 15.

クッション材１において、網材収納凹所１０は、図８乃至図１０、図１２、図１４、図１８及び図１９に示すように、各クッション部５〜９にて区画されて形成される。網材収納凹所１０は、各クッション部５〜９にて区画されて、直方体（又は立方体）の空間に形成される。
網材収納凹所１０は、各クッション部５〜９の内側に形成され、着座側クッション部５のクッション裏平面５Ｂ（クッション裏面）にて閉塞（閉鎖）される。網材収納凹所１０は、クッション厚さ方向ＣＴ（クッション上下方向）において、前側クッション部６のクッション端６Ｃ、後側クッション部７のクッション端７Ｃ、左側クッション部８のクッション端８Ｃ、及び右側クッション部９のクッション端９Ｃに開口される。 In the cushion material 1, the net material storage recess 10 is formed by being partitioned by the cushion portions 5 to 9 as shown in FIGS. 8 to 10, 12, 14, 18, and 19. The net material storage recess 10 is partitioned by each of the cushion portions 5 to 9 and is formed in a rectangular parallelepiped (or cubic) space.
The net material storage recess 10 is formed inside each of the cushion portions 5 to 9, and is closed (closed) by the cushion back flat surface 5B (cushion back surface) of the seating side cushion portion 5. In the cushion thickness direction CT (cushion vertical direction), the net material storage recess 10 has a cushion end 6C of the front cushion portion 6, a cushion end 7C of the rear cushion portion 7, a cushion end 8C of the left cushion portion 8, and the right side. It is opened at the cushion end 9C of the cushion portion 9.

着座凹み部１５は、図３、図１５及び図１６に示すように、クッション材１において、着座側クッション部５に形成される。着座凹み部１５は、例えば、クッション幅中心線Ｃｆを境として対称（左右対称）に形成される。
着座凹み部１５は、図１、図３、図９、図１１乃至図１６、図１８及び図１９に示すように、着座側クッション部５のクッション表平面５Ａの一部であって、クッション厚さ方向ＣＴ（クッション上下方向）のクッション表平面５Ａの一部がクッション厚さ方向ＣＴに凹んだ着座平面１６（着座面）を有する。
着座凹み部１５は、着座側クッション部５のクッション裏平面５Ｂの一部であって、着座平面１６に対向するクッション裏平面５Ｂの一部の膨出裏平面１７（膨出裏面）をクッション裏平面５Ｂから膨出して形成される。着座凹み部１５は、着座者（人／乗客）の臀部が着座平面１６から着座される。 As shown in FIGS. 3, 15 and 16, the seating recess 15 is formed in the seating side cushion portion 5 in the cushion material 1. The seating recess 15 is formed symmetrically (symmetrically) with the cushion width center line Cf as a boundary, for example.
As shown in FIGS. 1, 3, 9, 11, 16, 18, and 19, the seating recess 15 is a part of the cushion surface plane 5A of the seating side cushion 5, and has a cushion thickness. A part of the cushion surface plane 5A in the longitudinal direction CT (cushion vertical direction) has a seating plane 16 (seat surface) recessed in the cushion thickness direction CT.
The seating recess 15 is a part of the cushion back plane 5B of the seating side cushion portion 5, and a part of the bulging back plane 17 (bulging back surface) of the cushion back plane 5B facing the seating plane 16 is the back of the cushion. It is formed by bulging from the plane 5B. In the seating recess 15, the buttocks of the seated person (person / passenger) are seated from the seating plane 16.

着座凹み部１５は、図８、図１８及び図１９に示すように、着座側クッション部５のクッション表平面５Ａの一部、及びクッション裏平面５Ｂの一部において、着座平面１６及び膨出裏平面１７の間に略均一（又は均一）のクッション厚さ：Ｔを有して形成される。着座凹み部１５は、クッション厚さ方向ＣＴにおいて、着座平面１６及び膨出裏平面１７の間に略同一（又は同一）のクッション厚さ：Ｔを有して形成される。着座凹み部１５は、着座平面１６の全表面及び膨出裏平面１７の全裏面にわたって、略均一（略同一）のクッション厚さ：Ｔを有して、着座側クッション部５に形成される。 As shown in FIGS. 8, 18 and 19, the seating recessed portion 15 has a seating plane 16 and a bulging back in a part of the cushion front plane 5A and a part of the cushion back plane 5B of the seating side cushion portion 5. Formed with a substantially uniform (or uniform) cushion thickness: T between the flat surfaces 17. The seating recess 15 is formed to have substantially the same (or the same) cushion thickness: T between the seating plane 16 and the bulging back plane 17 in the cushion thickness direction CT. The seating recess 15 has a substantially uniform (substantially the same) cushion thickness: T over the entire surface of the seating plane 16 and the entire back surface of the bulging back plane 17, and is formed on the seating side cushion portion 5.

着座凹み部１５において、着座平面１６（着座面）は、図８及び図１８に示すように、着座側クッション部５のクッション表平面５Ａからクッション裏平面５Ｂ側に傾斜しつつ、クッション前後方向ＣＦの一方のクッション端５Ｄ側（クッション後端５Ｄ側）に延在される。 In the seating recess 15, the seating plane 16 (seat surface) is inclined from the cushion front plane 5A of the seating side cushion portion 5 to the cushion back plane 5B side as shown in FIGS. 8 and 18, and is CF in the front-rear direction of the cushion. It extends to one cushion end 5D side (cushion rear end 5D side).

着座平面１６は、図３、図８、図１３、図１５及び図１８に示すように、クッション前後方向ＣＦにおいて、着座側クッション部５の他方のクッション端５Ｃ（クッション前端５Ｃ）に間隔を隔てる前側表位置Ｐ１（傾斜開始表位置）から傾斜されて形成される。着座平面１６は、着座側クッション部５のクッション表平面５Ａに対して、クッション裏平面５Ｂ側に傾斜角度：θ１（例えば、θ１＝１３〜１５°の任意の角度）を隔てて傾斜して、クッション前後方向ＣＦにおいて、着座側クッション部５の一方のクッション端５Ｄ側（クッション後端５Ｄ側）に延在される。
着座平面１６は、図３及び図１５に示すように、前側表位置Ｐ１にクッション幅方向ＣＨの面幅：ＨＡ、及びクッション前後方向ＦＣの一方のクッション端５Ｄ側（クッション後端５Ｄ側）にクッション幅方向ＣＨに面幅：ＨＢを有して、着座側クッション部５に形成される。着座平面１６の面幅：ＨＡ，ＨＢは、着座者の臀部より大きい幅である。但し、面幅：ＨＡは、面幅：ＨＢより幅広である（ＨＡ＞ＨＢ）。着座平面１６は、クッション前後方向ＣＦにおいて、前側表位置Ｐ１から段々（徐々）に縮幅（面幅を縮小）しつつ、一方のクッション端５Ｄ側（クッション後端５Ｄ側）に延在される。
着座平面１６は、前側表位置Ｐ１からクッション端５Ｄ側（クッション後端５Ｄ側）に向けてクッション前後方向ＣＦの面長さ：ＬＡを有して、着座側クッション部５に形成される。着座平面１６の面長さ：ＬＡは、着座者の臀部より大きい長さである。
これにより、着座平面１６は、クッション前後方向ＣＦにおいて、前側表位置Ｐ１（傾斜開始表位置）から段々（徐々）に着座凹み部１５のクッション厚さ方向ＣＴの深さ（凹み深さ）を深くしつつ傾斜されて、着座側クッション部５の一方のクッション端５Ｄ側（クッション後端５Ｄ側）に延在される。 As shown in FIGS. 3, 8, 13, 15, and 18, the seating plane 16 is spaced from the other cushion end 5C (cushion front end 5C) of the seating side cushion portion 5 in the cushion front-rear direction CF. It is formed so as to be inclined from the front side front position P1 (inclination start table position). The seating plane 16 is tilted toward the cushion back plane 5B side with respect to the cushion front plane 5A of the seating side cushion portion 5 with an inclination angle: θ1 (for example, an arbitrary angle of θ1 = 13 to 15 °). In the front-rear direction CF of the cushion, it extends to one cushion end 5D side (cushion rear end 5D side) of the seating side cushion portion 5.
As shown in FIGS. 3 and 15, the seating plane 16 has a surface width of the cushion width direction CH at the front side front position P1: HA and one cushion end 5D side (cushion rear end 5D side) of the cushion front-rear direction FC. It has a surface width: HB in the cushion width direction CH and is formed on the seating side cushion portion 5. Surface width of the seating plane 16: HA and HB are widths larger than the buttocks of the seated person. However, the surface width: HA is wider than the surface width: HB (HA> HB). The seating plane 16 extends to one cushion end 5D side (cushion rear end 5D side) while gradually (gradually reducing) the width (reducing the surface width) from the front side front position P1 in the cushion front-rear direction CF. ..
The seating plane 16 has a surface length of CF in the front-rear direction of the cushion: LA from the front side front position P1 toward the cushion end 5D side (cushion rear end 5D side), and is formed on the seating side cushion portion 5. Surface length of seating plane 16: LA is a length larger than the buttocks of the seated person.
As a result, the seating plane 16 gradually (gradually) increases the depth (recess depth) of the seating recess 15 in the cushion thickness direction CT from the front front position P1 (tilt start table position) in the cushion front-rear direction CF. The seating side cushion portion 5 is inclined while extending to one cushion end 5D side (cushion rear end 5D side) of the seating side cushion portion 5.

着座凹み部１５において、膨出裏平面１７は、図８、図１４、図１６及び図１８に示すように、着座側クッション部５のクッション裏平面５Ｂ（クッション裏面）から網材収納凹所１０側（三次元立体網状材２の網材表平面２Ａ側）に傾斜しつつ、着座側クッション部５の一方のクッション端５Ｄ側（クッション後端５Ｄ側）に延在される。 In the seating recess 15, the bulging back flat surface 17 is formed from the cushion back plane 5B (back surface of the cushion) of the seating side cushion portion 5 to the net material storage recess 10 as shown in FIGS. 8, 14, 16 and 18. It extends to one cushion end 5D side (cushion rear end 5D side) of the seating side cushion portion 5 while being inclined to the side (the net material surface plane 2A side of the three-dimensional three-dimensional net-like material 2).

膨出裏平面１７は、図８、図１４、図１６及び図１８に示すように、クッション前後方向ＣＦにおいて、着座側クッション部５の他方のクッション端５Ｃ（クッション前端５Ｃ）に間隔を隔てる前側裏位置Ｐ２（傾斜開始裏位置）から傾斜されて形成される。
膨出裏平面１７は、着座側クッション部５のクッション裏平面５Ｂに対して、網材収納凹所１０側（三次元立体網状材２側）に傾斜角度：θ１を隔てて傾斜して、クッション前後方向ＣＦにおいて、着座側クッション部５の一方のクッション端５Ｄ側（クッション後端５Ｄ側）に延在される。
膨出裏平面１７は、図１６に示すように、前側裏位置Ｐ２にクッション幅方向ＣＨの面幅：ＨＣ、及びクッション前後方向ＣＦの一方のクッション端５Ｄ側（クッション後端５Ｄ側）にクッション幅方向ＣＨの面幅：ＨＤを有して、着座側クッション部５に形成される。膨出裏平面１７の面幅：ＨＣ，ＨＤは、着座者の臀部より大きい幅である。但し、面幅：ＨＣは、面幅：ＨＤより幅広である（ＨＣ＞ＨＤ）。膨出裏平面１７は、クッション前後方向ＣＦにおいて、前側裏位置Ｐ２から段々（徐々）に縮幅（面幅を縮小）しつつ、一方のクッション端５Ｄ側（クッション後端５Ｄ側）に延在される。
膨出裏平面１７は、前側裏位置Ｐ２からクッション端５Ｄ側（クッション後端５Ｄ側）に向けてクッション前後方向ＣＦの面長さ：ＬＢを有して、着座側クッション部５に形成される。膨出裏平面１７の面長さ：ＬＢは、着座者の臀部より大きい長さである。
これにより、膨出裏平面１７は、クッション前後方向ＣＦにおいて、前側裏位置Ｐ２（傾斜開始裏位置）から段々（徐々）にクッション裏平面５Ｂから膨出する膨出量を大きくしつつ（多くしつつ）傾斜されて、着座側クッション部５の一方のクッション端５Ｄ側（クッション後端５Ｄ側）に延在される。 As shown in FIGS. 8, 14, 16 and 18, the bulging back plane 17 is a front side that is spaced from the other cushion end 5C (cushion front end 5C) of the seating side cushion portion 5 in the cushion front-rear direction CF. It is formed so as to be inclined from the back position P2 (tilt start back position).
The bulging back flat surface 17 is tilted toward the net material storage recess 10 side (three-dimensional three-dimensional net material 2 side) with respect to the cushion back flat surface 5B of the seating side cushion portion 5 with an inclination angle: θ1. In the front-rear direction CF, it extends to one cushion end 5D side (cushion rear end 5D side) of the seating side cushion portion 5.
As shown in FIG. 16, the bulging back plane 17 has a front side back position P2, a surface width of CH in the cushion width direction: HC, and a cushion on one cushion end 5D side (cushion rear end 5D side) of the cushion front-rear direction CF. Surface width of CH in the width direction: It has HD and is formed on the seating side cushion portion 5. Surface width of the bulging back plane 17: HC and HD are widths larger than the buttocks of the seated person. However, the surface width: HC is wider than the surface width: HD (HC> HD). The bulging back plane 17 extends to one cushion end 5D side (cushion rear end 5D side) while gradually (gradually reducing) the width (reducing the surface width) from the front side back position P2 in the cushion front-rear direction CF. Will be done.
The bulging back plane 17 has a surface length of CF in the front-rear direction of the cushion: LB from the front side back position P2 toward the cushion end 5D side (cushion rear end 5D side), and is formed on the seating side cushion portion 5. .. Surface length of bulging back plane 17: LB is a length larger than the buttocks of the seated person.
As a result, the bulging back plane 17 gradually (gradually) increases the amount of bulging from the cushion back plane 5B from the front side back position P2 (tilt start back position) in the cushion front-rear direction CF (increases). It is inclined and extends to one cushion end 5D side (cushion rear end 5D side) of the seating side cushion portion 5.

着座凹み部１５において、着座平面１６及び膨出裏平面１７は、図８、図１８及び図１９に示すように、相互間のクッション厚さを略均一（略同一）の厚さとしつつ傾斜されて、着座側クッション部５の一方のクッション端５Ｄ側（クッション後端５Ｄ側）に延在される。 In the seating recess 15, the seating plane 16 and the bulging back plane 17 are inclined so that the cushion thicknesses between them are substantially uniform (substantially the same) as shown in FIGS. 8, 18 and 19. , It extends to one cushion end 5D side (cushion rear end 5D side) of the seating side cushion portion 5.

クッション材１は、図８及び図１８に示すように、着座平面１６及び膨出裏平面１７の間において、繊維構造体４（繊維構造シート）をクッション前後方向ＣＦに複数積層して形成される（複数重ねて形成される）。繊維構造体４は、クッション厚さ方向ＣＴにクッション厚さ：Ｔを有して延在され、及びクッション厚さ：Ｔで折返されて複数積層される。
これにより、クッション材１は、着座平面１６及び膨出裏平面１７の間において、クッション前後方向ＣＦに繊維構造体４を複数積層した縦繊維構造となる。 As shown in FIGS. 8 and 18, the cushion material 1 is formed by laminating a plurality of fiber structures 4 (fiber structure sheets) in the cushion front-rear direction CF between the seating plane 16 and the bulging back plane 17. (Formed by stacking multiple layers). The fiber structure 4 is extended with a cushion thickness: T in the CT in the cushion thickness direction, and is folded back at the cushion thickness: T to be laminated.
As a result, the cushion material 1 has a longitudinal fiber structure in which a plurality of fiber structures 4 are laminated on the CF in the front-rear direction of the cushion between the seating plane 16 and the bulging back plane 17.

三次元立体網状材２は、図８乃至図１２、及び図２０乃至図２４に示すように、バネ材であって、多数本の線条ＰＥ（線条体）で構成される。三次元立体網状材２において、線条ＰＥ（線条体）は、熱接着性合成樹脂（例えば、熱可塑性合成樹脂）で形成され、バネ弾性を有する連続線条ＰＥ（長尺に連続する線条ＰＥ）である。線条ＰＥにおいて、熱接着性合成樹脂は、耐熱性に優れた特性を示す、ポリエステル系樹脂、ポリオレフィン系樹脂等である。ポリエステル系樹脂の中でも、耐久性に優れた特性を示す、共重合ポリエステル、ブロック共重合ポリエーテルエステル、ブロック共重ポリエステルエステル等の重合体を用いることができる。また、三次元立体網状材２の線条ＰＥ（線条体）は、ポリエステル系熱可塑性エラストマ（ＴＰＥＥ）、ポリエチレン樹脂（ＰＥ）等を用いることができる。
線条ＰＥの太さは、三次元立体網状材２のクッション性（弾性力／バネ力）を十分に得るために、０．２〜１．０ｍｍ程度にする。 As shown in FIGS. 8 to 12 and 20 to 24, the three-dimensional three-dimensional net-like material 2 is a spring material and is composed of a large number of striatum PEs (striatums). In the three-dimensional three-dimensional net-like material 2, the striatum PE (striatum) is formed of a heat-adhesive synthetic resin (for example, a thermoplastic synthetic resin) and has spring elasticity. Article PE). In the linear PE, the heat-adhesive synthetic resin is a polyester-based resin, a polyolefin-based resin, or the like, which exhibits excellent heat resistance. Among the polyester-based resins, polymers such as copolymerized polyester, block copolymerized polyether ester, and block copolymerized polyester ester, which exhibit excellent durability, can be used. Further, as the striatum PE (striatum) of the three-dimensional three-dimensional net-like material 2, polyester-based thermoplastic elastomer (TPEE), polyethylene resin (PE) or the like can be used.
The thickness of the linear PE is set to about 0.2 to 1.0 mm in order to sufficiently obtain the cushioning property (elastic force / spring force) of the three-dimensional three-dimensional net-like material 2.

三次元立体網状材２は、多数本の線条ＰＥ（線条体）を多方向（上下左右）に三次元的に屈曲し、及び絡ませて多数のランダムループを形成させる。三次元立体網状材２は、絡み合った線条ＰＥ同士の接触部を接合（熱溶着）して構成される。
これにより、三次元立体網状材２は、ランダムループの線条ＰＥ（熱接着性合成樹脂の線条ＰＥ）が弾性変形することで、軟らかさ及びバネ製を備えたクッション性を発揮する。
三次元立体網状材２は、例えば、東洋紡株式会社から提供される「ブレスエアー（登録商標）」を用いる。 In the three-dimensional three-dimensional net-like material 2, a large number of striatum PEs (striatums) are three-dimensionally bent and entangled in multiple directions (up, down, left, and right) to form a large number of random loops. The three-dimensional three-dimensional net-like material 2 is formed by joining (heat welding) the contact portions between the entangled linear PEs.
As a result, the three-dimensional three-dimensional net-like material 2 exhibits softness and cushioning properties made of spring by elastically deforming the linear PE of the random loop (the linear PE of the heat-adhesive synthetic resin).
For the three-dimensional three-dimensional net-like material 2, for example, "Breath Air (registered trademark)" provided by Toyobo Co., Ltd. is used.

三次元立体網状材２は、例えば、網材収納凹所１０と略同一の直方体又は立方体に形成される。三次元立体網状材２は、図８及び図９に示すように、網材厚さ方向ＢＴの一方の網材表平面２Ａをクッション材１のクッション裏平面５Ｂ（着座側クッション部５のクッション裏平面５Ｂ）に当接して、クッション材１の内側に配置される。三次元立体網状材２は、クッション材１の網材収納凹所１０内に挿入されて、クッション材１の内側に配置される。なお、網材厚さ方向ＢＴは、三次元立体網状材２の網材上下方向である。 The three-dimensional three-dimensional net-like material 2 is formed in, for example, a rectangular parallelepiped or a cube substantially the same as the net material storage recess 10. As shown in FIGS. 8 and 9, in the three-dimensional three-dimensional net-like material 2, one of the net material front planes 2A in the net material thickness direction BT is used as the cushion back plane 5B of the cushion material 1 (the back of the cushion of the seating side cushion portion 5). It abuts on the flat surface 5B) and is arranged inside the cushion material 1. The three-dimensional three-dimensional net-like material 2 is inserted into the net material storage recess 10 of the cushion material 1 and arranged inside the cushion material 1. The net material thickness direction BT is the net material vertical direction of the three-dimensional three-dimensional net-like material 2.

三次元立体網状材２は、図８、図９、図１１、図２０、及び図２２乃至図２４に示すように、網材着座凹み部２１を備える。網材着座凹み部２１は、三次元立体網状材２に形成される。網材着座凹み部２１は、例えば、網材厚さ方向ＢＴと直交する網材幅方向ＢＨにおいて、網材幅中心線Ｂｆを境として対称（左右対称）に形成される。なお、網材幅方向ＢＨは、三次元立体網状材２の網材左右方向である。 The three-dimensional three-dimensional net-like material 2 includes a net material seating recess 21 as shown in FIGS. 8, 9, 11, 20, and 22 to 24. The net material seating recess 21 is formed in the three-dimensional three-dimensional net-like material 2. The net material seating recess 21 is formed symmetrically (symmetrically) with the net material width center line Bf as a boundary in, for example, the net material width direction BH orthogonal to the net material thickness direction BT. The net material width direction BH is the net material left-right direction of the three-dimensional three-dimensional net-like material 2.

網材着座凹み部２１は、図８、図９、図１１、図２０、及び図２２乃至図２４に示すように、網材表平面２Ａ（網材表面）の一部が網材厚さ方向ＢＴに凹んで形成された網材着座平面２２を有する。網材着座凹み部２１は、クッション裏平面５Ｂから膨出する着座凹み部１５（クッション裏平面５Ｂ及び膨出裏平面１７）に倣った形状に形成される。
網材着座凹み部２１は、網材表平面２Ａ（網材表面）の一部において、三次元立体網状材２の線条ＰＥ（線条体）を網材厚さ方向ＢＴの網材裏平面２Ｂ側（網材裏面側）に圧縮（熱圧縮／加熱圧縮）して形成される。 As shown in FIGS. 8, 9, 11, 20, and 22 to 24, a part of the net material surface plane 2A (net material surface) of the net material seating recess 21 is in the net thickness direction. It has a net material seating plane 22 formed by being recessed in the BT. The net material seating recess 21 is formed in a shape that follows the seating recess 15 (cushion back plane 5B and bulging back plane 17) that bulges from the cushion back plane 5B.
The net material seating recess 21 is a part of the net material front plane 2A (net material surface), and the streak PE (stripe body) of the three-dimensional three-dimensional net-like material 2 is formed on the net material back plane in the net material thickness direction BT. It is formed by compression (heat compression / heat compression) on the 2B side (back side of the net material).

網材着座凹み部２１において、網材着座平面２２は、図８、図９、図２０、及び図２２乃至図２４に示すように、着座側クッション部５（着座凹み部１５）の膨出裏平面１７に倣った傾斜面に形成される。網材着座平面２２は、三次元立体網状材２の網材表平面２Ａ（網材表面）から網材裏平面２Ｂ側（網材裏面側）に傾斜しつつ、網材前後方向ＢＦの一方の網材端面２Ｄ側（網材後側端面２Ｄ側）に延在される。なお、網材前後方向ＢＦは、網材厚さ方向ＢＴ及び網材幅方向ＢＨと直交する方向である。
In the net material seating recess 21, the net material seating plane 22 is the bulging back of the seating side cushion portion 5 (seating recess 15) as shown in FIGS. 8, 9, 20, and 22 to 24. It is formed on an inclined surface that follows the plane 17. The net material seating plane 22 is inclined from the net material front plane 2A (net material front surface) of the three-dimensional three-dimensional net-like material 2 to the net material back plane 2B side (net material back surface side), and is one of the net material front-rear direction BF. It extends to the end face 2D side of the net material (the end face 2D side on the rear side of the net material). The net material front-rear direction BF is a direction orthogonal to the net material thickness direction BT and the net material width direction BH.

網材着座平面２２（網材着座面）は、図８、図２２及び図２３に示すように、網材前後方向ＢＦにおいて、三次元立体網状材２の他方の網材端面２Ｃ（網材前側端面２Ｃ）に間隔を隔てる前側表網材位置Ｐ３（傾斜開始表位置）から傾斜される。網材着座平面２２は、三次元立体網状材２の網材表平面２Ａに対して、網材厚さ方向ＢＴの網材裏平面２Ｂ側に傾斜角度：θ１を隔てて傾斜して、網材前後方向ＢＦにおいて、三次元立体網状材２の一方の網材端面２Ｄ側（網材後側端面２Ｄ側）に延在される。
網材着座平面２２は、図２２に示すように、前側表網材位置Ｐ３に網材幅方向ＢＨの面幅：ＨＥ、及び網材前後方向ＢＦの一方の網材端面２Ｄ側（網材後側端面２Ｄ側）に網材幅方向ＢＨの面幅：ＨＦを有して、三次元立体網状材２に形成される。網材着座平面２２の面幅：ＨＥは、着座側クッション部５の膨出裏平面１７の面幅：ＨＣより僅かに大きい幅であり（ＨＥ＞ＨＣ）、網材着座平面２２の面幅：ＨＦは、膨出裏平面１７の面幅：ＨＤより僅かに大きい幅である。但し、面幅：ＨＥは、面幅：ＨＦより幅広である（ＨＥ＞ＨＦ）。網材着座平面２２は、網材前後方向ＢＦにおいて、前側表網材位置Ｐ３から段々（徐々）に縮幅（面幅を縮小）しつつ、一方の網材端面２Ｄ側（網材後側端面２Ｄ側）に延在される。
網材着座平面２２は、前側表網材位置Ｐ３から網材端面２Ｄ側（網材後側端面２Ｄ側）に向けて網材前後方向ＢＦの面長さ：ＬＣを有して、三次元立体網状材２に形成される。網材着座平面２２の面長さ：ＬＣは、膨出裏平面１７の面長さ：ＬＢより僅かに大きい長さである。
これにより、網材着座平面２２は、網材前後方向ＢＦにおいて、前側表網材位置Ｐ３（傾斜開始表位置）から段々（徐々）に網材着座凹み部２１の網材厚さ方向ＢＴの深さ（凹み深さ）を深くしつつ傾斜されて、三次元立体網状材２の一方の網材端面２Ｄ側（網材後側端面２Ｄ側）に延在される。 As shown in FIGS. 8, 22 and 23, the net material seating plane 22 (net material seating surface) is the other net material end surface 2C (net material front side) of the three-dimensional three-dimensional net-like material 2 in the net material front-rear direction BF. It is inclined from the front surface net material position P3 (inclination start table position) separated from the end surface 2C). The net material seating plane 22 is inclined with respect to the net material front plane 2A of the three-dimensional three-dimensional net-like material 2 toward the net material back plane 2B side in the net material thickness direction BT with an inclination angle: θ1. In the front-rear direction BF, it extends to one net material end surface 2D side (the net material rear side end surface 2D side) of the three-dimensional three-dimensional net-like material 2.
As shown in FIG. 22, the net material seating plane 22 has a surface width in the net material width direction BH: HE and one net material end surface 2D side (after the net material) in the front side surface net material position P3. The side end surface 2D side) has a surface width of BH in the net material width direction: HF, and is formed on the three-dimensional three-dimensional net-like material 2. The surface width of the net material seating plane 22: HE is the surface width of the bulging back plane 17 of the seating side cushion portion 5: a width slightly larger than HC (HE> HC), and the surface width of the net material seating plane 22: HF is a width slightly larger than the surface width of the bulging back plane 17: HD. However, the surface width: HE is wider than the surface width: HF (HE> HF). The net material seating plane 22 gradually (gradually reduces) the width (reducing the surface width) from the front side surface net material position P3 in the net material front-rear direction BF, and one of the net material end faces 2D side (the net material rear end face). It is extended to the 2D side).
The net material seating plane 22 has a surface length of the net material front-rear direction BF: LC from the front side surface net material position P3 toward the net material end surface 2D side (the net material rear end surface 2D side), and is a three-dimensional solid. It is formed on the net-like material 2. The surface length of the net material seating plane 22: LC is a length slightly larger than the surface length of the bulging back plane 17: LB.
As a result, the net material seating plane 22 gradually (gradually) from the front side surface net material position P3 (inclination start table position) in the net material front-rear direction BF, and the depth of the net material thickness direction BT of the net material seating recess 21 It is inclined while increasing the depth (dent depth), and extends to one net material end surface 2D side (net material rear end surface 2D side) of the three-dimensional three-dimensional net-like material 2.

網材着座平面２２（網材着座凹み部２１）は、網材表平面２Ａの一部において、三次元立体網状材２の線条ＰＥ（線条体）を網材厚さ方向ＢＴの網材裏平面２Ｂ側（網材裏面側）に圧縮して形成される。網材着座平面２２は、例えば、三次元立体網状材２の線条ＰＥを加熱しつつ網材裏平面２Ｂ側に圧縮（熱圧縮／加熱圧縮）して形成される。なお、三次元立体網状材２の網材裏平面２Ｂは、線条ＰＥの圧縮（熱圧縮／加熱圧縮）にて変形することなく、平面形状に維持される。
網材着座平面２２は、網材厚さ方向ＢＴにおいて、三次元立体網状材２の線条ＰＥ（網材表平面２Ａの一部）を網材裏平面２Ｂ側に圧縮して凹ませて、網材表平面２Ａに対して傾斜角度：θ１を隔てて傾斜して、膨出裏平面１７に倣った傾斜面に形成される。
三次元立体網状材２において、線条ＰＥの圧縮量（凹み量）は、網材前後方向ＢＦにおいて、前側表網材位置Ｐ３から一方の網材端面２Ｄ側（網材後側端面２Ｄ側）に向けて、段々（徐々）に多くして、網材着座平面２２を形成する。
これにより、三次元立体網状材２は、網材厚さ方向ＢＴにおいて、線条ＰＥの密度の相異する構成に形成される。なお、密度は、単位体積当たりの線条ＰＥの質量である。
三次元立体網状材２において、線条ＰＥ（線条体）の密度の相異は、クッション性である弾性力（バネ力／バネ定数）の相異する構造となる。 In the net material seating plane 22 (net material seating recess 21), in a part of the net material surface plane 2A, the streak PE (stripe body) of the three-dimensional three-dimensional net-like material 2 is used as the net material in the net material thickness direction BT. It is formed by compressing it on the back surface 2B side (the back surface side of the net material). The net material seating plane 22 is formed, for example, by heating the linear PE of the three-dimensional three-dimensional net-like material 2 and compressing (heat compression / heat compression) toward the net material back plane 2B side. The net material back plane 2B of the three-dimensional three-dimensional net-like material 2 is maintained in a flat shape without being deformed by the compression (heat compression / heat compression) of the linear PE.
The net material seating plane 22 is formed by compressing and denting the linear PE (a part of the net material front plane 2A) of the three-dimensional three-dimensional net-like material 2 toward the net material back plane 2B side in the net material thickness direction BT. It is formed on an inclined surface that follows the bulging back plane 17 by inclining with respect to the net material front plane 2A with an inclination angle: θ1.
In the three-dimensional three-dimensional net material 2, the compression amount (dent amount) of the linear PE is the one net material end surface 2D side (the net material rear end surface 2D side) from the front side surface net material position P3 in the net material front-rear direction BF. The net material seating plane 22 is formed by gradually increasing the number toward the surface.
As a result, the three-dimensional three-dimensional net-like material 2 is formed in a configuration in which the densities of the linear PEs are different in the net material thickness direction BT. The density is the mass of linear PE per unit volume.
In the three-dimensional three-dimensional net-like material 2, the difference in the density of the striatum PE (striatum) has a structure in which the elastic force (spring force / spring constant), which is a cushioning property, is different.

三次元立体網状材２において、網材着座凹み部２１（網材着座平面２２）を除く部分では、線条ＰＥが疎（疎密／粗密）となり、網材着座凹み部２１（網材着座平面２２）では、線条ＰＥが密となる。
網材着座平面２２は、網材前後方向ＢＦにおいて、前側表網材位置Ｐ３から一方の網材端面２Ｄ側（網材後側端面２Ｄ側）に向けて、段々（徐々）に線条ＰＥ（線条体）の密度を疎から密にして形成される。網材着座平面２２は、一方の網材端面２Ｄ側（網材後側端面２Ｄ側）で線条ＰＥの密度を最大として形成される。
これにより、網材着座平面２２は、網材前後方向ＢＦにおいて、前側表網材位置Ｐ３から一方の網材端面２Ｄ側（網材後側端面２Ｄ側）に向けて、段々（徐々）に線条ＰＥ（線条体）の弾性力（バネ力／バネ定数）を低から高にして形成される。網材着座平面２２は、一方の網材端面２Ｄ側（網材後側端面２Ｄ側）で線条ＰＥの弾性力（バネ力／バネ定数）を最大として形成される。 In the three-dimensional three-dimensional net-like material 2, the linear PE becomes sparse (sparse and dense / coarse and dense) in the portion other than the net material seating recess 21 (net material seating plane 22), and the net material seating recess 21 (net material seating plane 22) becomes sparse. ), The streak PE becomes dense.
In the front-rear direction BF of the net material, the net material seating plane 22 is gradually (gradually) striatum PE (from the front side surface net material position P3 toward one net material end surface 2D side (the net material rear end surface 2D side). It is formed by changing the density of the striatum) from sparse to dense. The net material seating plane 22 is formed on one of the net material end faces 2D side (the net material rear end face 2D side) with the maximum density of the streak PE.
As a result, the net material seating plane 22 is gradually (gradually) lined from the front side surface net material position P3 toward one net material end surface 2D side (the net material rear end surface 2D side) in the net material front-rear direction BF. It is formed by changing the elastic force (spring force / spring constant) of the strip PE (straight body) from low to high. The net material seating plane 22 is formed on one of the net material end faces 2D side (the net material rear end face 2D side) with the elastic force (spring force / spring constant) of the linear PE maximized.

三次元立体網状材２の線条ＰＥ（線条ＰＥの密度）は、図２４に示すように、網材幅方向ＢＨにおいて、網材着座平面２２（網材着座凹み部２１）で密となり、網材着座凹み部２１及び各網材端面２Ｅ，２Ｆ（網材左側端面２Ｅ，網材右側端面２Ｆ）の間で疎（疎密、粗密）となる。 As shown in FIG. 24, the linear PE (density of the linear PE) of the three-dimensional three-dimensional net-like material 2 becomes dense at the mesh material seating flat surface 22 (net material seating recess 21) in the net material width direction BH. It becomes sparse (sparse and dense) between the net material seating recess 21 and the net material end faces 2E and 2F (net material left end face 2E, net material right end face 2F).

三次元立体網状材２は、図８乃至図１０に示すように、クッション材１の網材収納凹所１０に挿入（収納）されて、クッション材１の内側に配置される。
三次元立体網状材２は、各クッション部６〜９の各クッション端６Ｃ〜９Ｄから網材収納凹所１０内に挿入（収納）される。 As shown in FIGS. 8 to 10, the three-dimensional three-dimensional net-like material 2 is inserted (stored) into the net material storage recess 10 of the cushion material 1 and arranged inside the cushion material 1.
The three-dimensional three-dimensional net-like material 2 is inserted (stored) into the net material storage recess 10 from the cushion ends 6C to 9D of the cushion portions 6 to 9.

三次元立体網状材２は、図８乃至図１２に示すように、網材前後方向ＢＦの一方の網材端面２Ｃ（網材前側端面２Ｃ）を前側クッション部６に向け、及び網材表平面２Ａ（網材着座平面２２）をクッション裏平面５Ｂ（膨出裏平面１７）に向けて、網材収納凹所１０内に挿入（収納）される。三次元立体網状材２は、前側表網材位置Ｐ３を前側裏位置Ｐ２に近接（隣接／接近）して網材収納凹所１０内に挿入（収納）される。三次元立体網状材２は、網材着座平面２２を除く網材表平面２Ａを膨出裏平面１７を除くクッション裏平面５Ｂに当接し、及び網材着座平面２２の全面を膨出裏平面１７の全面に当接して、網材収納凹所１０内に挿入（収納）されて、クッション材１の内側に配置される。
これにより、三次元立体網状材２において、網材着座凹み部２１の網材着座平面２２は、着座凹み部１５（クッション材１／着座側クッション部５）の膨出裏平面１７に倣って当接して配置される。 In the three-dimensional three-dimensional net-like material 2, as shown in FIGS. 8 to 12, one net material end surface 2C (net material front end surface 2C) of the net material front-rear direction BF is directed toward the front cushion portion 6, and the net material surface plane. 2A (net material seating plane 22) is inserted (stored) into the net material storage recess 10 toward the cushion back surface 5B (bulging back surface 17). The three-dimensional three-dimensional net-like material 2 is inserted (stored) in the net material storage recess 10 with the front side front net material position P3 close to (adjacent / approaching) the front back position P2. The three-dimensional three-dimensional net-like material 2 abuts the net material front plane 2A excluding the net material seating plane 22 against the cushion back plane 5B excluding the bulging back plane 17, and bulges the entire surface of the net material seating plane 22. It abuts on the entire surface of the material, is inserted (stored) in the net material storage recess 10, and is arranged inside the cushion material 1.
As a result, in the three-dimensional three-dimensional net-like material 2, the net material seating plane 22 of the net material seating recess 21 follows the bulging back plane 17 of the seating recess 15 (cushion material 1 / seating side cushion portion 5). Placed in contact.

三次元立体網状材２は、網材端面２Ｃ（網材前側端面２Ｃ）を前側クッション部６のクッション内側平面６Ｂに当接し、及び網材端面２Ｄ（網材後側端面２Ｄ）を後側クッション部７のクッション内側平面７Ｂに当接して、網材収納凹所１０内に挿入（収納）される。三次元立体網状材２は、網材幅方向ＢＨの一方の網材端面２Ｅ（網材左側端面２Ｅ）を左側クッション部８のクッション内側平面８Ｂに当接し、網材幅方向ＢＨの他方の網材端面２Ｆ（網材右側端面２Ｆ）を右側クッション部９のクッション内側平面９Ｂに当接して、網材収納凹所１０内に収納される。
これにより、三次元立体網状材２は、図８及び図９に示すように、クッション材１（各クッション部５〜９）に対して隙間なく密接（密着）して、クッション材１の内側（網材収納凹所１０）に配置される。 In the three-dimensional three-dimensional net-like material 2, the net material end surface 2C (net material front end surface 2C) is in contact with the cushion inner flat surface 6B of the front cushion portion 6, and the net material end surface 2D (net material rear end surface 2D) is a rear cushion. It comes into contact with the cushion inner flat surface 7B of the portion 7 and is inserted (stored) into the net material storage recess 10. In the three-dimensional three-dimensional net-like material 2, one net material end surface 2E (net material left end surface 2E) of the net material width direction BH abuts on the cushion inner flat surface 8B of the left side cushion portion 8, and the other net in the net material width direction BH. The material end surface 2F (net material right end surface 2F) is brought into contact with the cushion inner flat surface 9B of the right side cushion portion 9 and is stored in the net material storage recess 10.
As a result, as shown in FIGS. 8 and 9, the three-dimensional three-dimensional net-like material 2 is in close contact (adhesion) with the cushion material 1 (each cushion portion 5 to 9) without a gap, and the inside of the cushion material 1 ( It is arranged in the net material storage recess 10).

三次元立体網状材２は、例えば、網材裏平面２Ｂを後側クッション部７のクッション端７Ｃに面一として、クッション材１の内側（網材収納凹所１０）に配置される。 The three-dimensional three-dimensional net-like material 2 is arranged inside the cushion material 1 (net material storage recess 10), for example, with the net material back plane 2B flush with the cushion end 7C of the rear cushion portion 7.

バネ受け材３（網受け材）は、例えば、合成樹脂繊維の固綿不織布シート（固綿シート又は硬綿シート）で形成される。 The spring receiving material 3 (net receiving material) is formed of, for example, a synthetic resin fiber solid cotton non-woven fabric sheet (solid cotton sheet or hard cotton sheet).

バネ受け材３は、図１乃至図９、図１１、図１２、及び図２５乃至図３２に示すように、バネ受け平板３１、前側固定板３２、後側固定板３３、左側固定板３４及び右側固定板３５を備える。バネ受け平板３１及び各固定板３２〜３５は、固綿不織布シートにて一体に形成される。
バネ受け材３は、例えば、バネ受け材３の板幅方向ＵＨにおいて、バネ受け平板３１の板幅中心線Ｕｆ（バネ受け材３の板幅中心線Ｕｆ）を境として対称（左右対称）に形成される。なお、板幅方向ＵＨは、バネ受け材３の板左右方向である。 The spring receiving member 3 includes a spring receiving flat plate 31, a front fixing plate 32, a rear fixing plate 33, a left fixing plate 34, and as shown in FIGS. 1 to 9, 11, 12, and 25 to 32. The right side fixing plate 35 is provided. The spring receiving flat plate 31 and the fixing plates 32 to 35 are integrally formed of a solid cotton non-woven fabric sheet.
For example, the spring receiving material 3 is symmetrical (symmetrically symmetrical) with respect to the plate width center line Uf of the spring receiving flat plate 31 (the plate width center line Uf of the spring receiving material 3) in the plate width direction UH of the spring receiving material 3. It is formed. The plate width direction UH is the plate left-right direction of the spring receiving member 3.

バネ受け平板３１は、図２、図４、図７乃至図９、図１１、図１２、及び図２５乃至図３２に示すように、網材収納凹所１０（三次元立体網状材２の網材裏平面２Ｂ）と略同一の矩形状平板（正方形又は長方形の平板）に形成される。バネ受け平板３１は、板幅方向ＵＨと直交する板厚さ方向ＵＴにおいて、バネ受け板表平面３１Ａ（板表平面）及びバネ受け板裏平面３１Ｂ（板裏平面）を有する。なお、板厚さ方向ＵＴは、板幅方向ＵＨと直交する板上下方向である。 As shown in FIGS. 2, 4, 7, 9, 11, 12, and 25 to 32, the spring receiving flat plate 31 has a net material storage recess 10 (a net of a three-dimensional three-dimensional net-like material 2). It is formed on a rectangular flat plate (square or rectangular flat plate) substantially the same as the material back plane 2B). The spring receiving flat plate 31 has a spring receiving plate front plane 31A (plate front plane) and a spring receiving plate back plane 31B (plate back plane) in the plate thickness direction UT orthogonal to the plate width direction UH. The plate thickness direction UT is a plate vertical direction orthogonal to the plate width direction UH.

前側固定板３２は、図２、図６乃至図８、図１１、図１２、及び図２５乃至図３２に示すように、板幅方向ＵＨ及び板厚さ方向ＵＴと直交する板前後方向ＵＦにおいて、バネ受け平板３１の他方の板端３１Ｃ（板前端３１Ｃ）に連続して、バネ受け平板３１に一体に形成される。前側固定板３２は、板厚さ方向ＵＴにおいて、バネ受け平板３１と直交して延在される。前側固定板３２は、板厚さ方向ＵＴにおいて、バネ受け平板３１の他方の板端３１Ｃ（板前端３１Ｃ）からバネ受け平板３１のバネ受け板裏平面３１Ｂ側に突出される。
前側固定板３２は、板幅方向ＵＨにおいて、バネ受け平板３１の各板端３１Ｅ，３１Ｆ（板左端３１Ｅ，板右端３１Ｆ）の間に延在される。
これにより、前側固定板３２は、板前後方向ＵＦにおいて、固定板表平面３２Ａ及び固定板裏平面３２Ｂを有する。 As shown in FIGS. 2, 6, 8, 12, and 25 to 32, the front fixing plate 32 is provided in the plate front-rear direction UF orthogonal to the plate width direction UH and the plate thickness direction UT. , Continuously formed on the other plate end 31C (plate front end 31C) of the spring receiving flat plate 31 and integrally formed with the spring receiving flat plate 31. The front fixing plate 32 extends orthogonally to the spring receiving flat plate 31 in the plate thickness direction UT. The front fixing plate 32 projects from the other plate end 31C (plate front end 31C) of the spring receiving flat plate 31 toward the spring receiving plate back plane 31B side of the spring receiving flat plate 31 in the plate thickness direction UT.
The front fixing plate 32 extends between the plate ends 31E and 31F (plate left end 31E, plate right end 31F) of the spring receiving flat plate 31 in the plate width direction UH.
As a result, the front fixing plate 32 has the fixing plate front plane 32A and the fixing plate back plane 32B in the plate front-rear direction UF.

前側固定板３２は、前側固定板片３６を有する。前側固定板片３６は、板厚さ方向ＵＴにおいて、前側固定板３２の前側板端３２Ｃに一体に形成される。前側固定板片３６は、板前後方向ＵＦにおいて、固定板表平面３２Ａから突出されて、板幅方向ＵＨにおいて、バネ受け平板３１の各板端３１Ｅ，３１Ｆ（板左端３１Ｅ，板右端３１Ｆ）の間に延在される。 The front fixing plate 32 has a front fixing plate piece 36. The front side fixing plate piece 36 is integrally formed with the front side plate end 32C of the front side fixing plate 32 in the plate thickness direction UT. The front side fixing plate piece 36 protrudes from the fixed plate surface plane 32A in the plate front-rear direction UF, and in the plate width direction UH, the plate ends 31E and 31F (plate left end 31E, plate right end 31F) of the spring receiving flat plate 31. It is postponed in between.

後側固定板３３は、図１乃至図４、図６乃至図８、図１１、図１２、及び図２５乃至図３２に示すように、板前後方向ＵＦにおいて、バネ受け平板３１の一方の板端３１Ｄ（板後端３１Ｄ）に連続して、バネ受け平板３１に一体に形成される。後側固定板３３は、板前後方向ＵＦにおいて、前側固定板３２に間隔を隔てて並設される。後側固定板３３は、板厚さ方向ＵＴにおいて、バネ受け平板３１の一方の板端３１Ｄ（板後端３１Ｄ）からバネ受け平板３１のバネ受け板表平面３１Ａ側に突出される。後側固定板３３は、後側クッション部７のクッション外側面７Ａ及びクッション端７Ｃに倣った形状に形成される。
後側固定板３３は、板幅方向ＵＨにおいて、バネ受け平板３１の各板端３１Ｅ，３１Ｆ（板左端３１Ｅ，板右端３１Ｆ）の間に延在される。
これにより、後側固定板３３は、板前後方向ＵＦにおいて、固定板表面３３Ａ及び固定板裏面３３Ｂを有する。 The rear fixing plate 33 is one plate of the spring receiving flat plate 31 in the plate front-rear direction UF as shown in FIGS. 1 to 4, 6 to 8, 11, 12, and 25 to 32. It is integrally formed with the spring receiving flat plate 31 continuously with the end 31D (the rear end 31D of the plate). The rear fixing plate 33 is arranged side by side with the front fixing plate 32 at intervals in the plate front-rear direction UF. The rear fixing plate 33 projects from one plate end 31D (plate rear end 31D) of the spring receiving flat plate 31 toward the spring receiving plate surface plane 31A side of the spring receiving flat plate 31 in the plate thickness direction UT. The rear fixing plate 33 is formed in a shape that follows the cushion outer surface 7A and the cushion end 7C of the rear cushion portion 7.
The rear fixing plate 33 extends between the plate ends 31E and 31F (plate left end 31E, plate right end 31F) of the spring receiving flat plate 31 in the plate width direction UH.
As a result, the rear fixing plate 33 has the fixing plate front surface 33A and the fixing plate back surface 33B in the plate front-rear direction UF.

左側固定板３４は、図２、図４、図６乃至図８、図１１、図１２、図２５乃至図３０及び図３２に示すように、板幅方向ＵＨにおいて、バネ受け平板３１の一方の板端３１Ｅ（板左端３１Ｅ）に連続して、バネ受け平板３１に一体に形成される。左側固定板３４は、板厚さ方向ＵＴにおいて、バネ受け平板３１と直交して延在される。左側固定板３４は、板厚さ方向ＵＴにおいて、バネ受け平板３１の一方の板端３１Ｅ（板左端３１Ｅ）からバネ受け平板３１のバネ受け板裏平面３１Ｂ側に突出される。
左側固定板３４は、板前後方向ＵＦにおいて、前側固定板３２から後側固定板３３に向けて延在される。
これにより、左側固定板３４は、板幅方向ＵＨにおいて、固定板表平面３４Ａ及び固定板裏平面３４Ｂを有する。 The left side fixing plate 34 is one of the spring receiving flat plates 31 in the plate width direction UH, as shown in FIGS. 2, 4, 6, 8, 11, 12, 25 to 30, and 32. It is integrally formed with the spring receiving flat plate 31 continuously with the plate end 31E (plate left end 31E). The left side fixing plate 34 extends orthogonally to the spring receiving flat plate 31 in the plate thickness direction UT. The left side fixing plate 34 projects from one plate end 31E (plate left end 31E) of the spring receiving flat plate 31 toward the spring receiving plate back plane 31B side of the spring receiving flat plate 31 in the plate thickness direction UT.
The left side fixing plate 34 extends from the front side fixing plate 32 toward the rear side fixing plate 33 in the plate front-rear direction UF.
As a result, the left side fixing plate 34 has the fixing plate front plane 34A and the fixing plate back plane 34B in the plate width direction UH.

左側固定板３４は、左側固定板片３７を有する。左側固定板片３７は、板厚さ方向ＵＴにおいて、左側固定板３４の左側板端３４Ｃに一体に形成される。左側固定板片３７は、板幅方向ＵＨにおいて、固定板表平面３４Ａから突出されて、前側固定板片３６と連続して形成される。
左側固定板片３７は、左側クッション部８のクッション端８Ｃに倣った形状に形成される。左側固定板片３７は、板前後方向ＵＦにおいて、前側固定板片３６（前側固定板３２）から後側固定板３３に向けて延在される。 The left side fixing plate 34 has a left side fixing plate piece 37. The left side fixing plate piece 37 is integrally formed with the left side plate end 34C of the left side fixing plate 34 in the plate thickness direction UT. The left side fixing plate piece 37 protrudes from the fixing plate surface plane 34A in the plate width direction UH, and is formed continuously with the front side fixing plate piece 36.
The left side fixing plate piece 37 is formed in a shape that follows the cushion end 8C of the left side cushion portion 8. The left side fixing plate piece 37 extends from the front side fixing plate piece 36 (front side fixing plate 32) toward the rear side fixing plate 33 in the plate front-rear direction UF.

右側固定板３５は、図１、図２、図６、図７、図１１、図１２、及び図２５乃至図３１に示すように、左側固定板３４と同一形状に形成される。右側固定板３５は、板幅方向ＵＨにおいて、バネ受け平板３１の他方の板端３１Ｆに連続して、バネ受け平板３１に一体に形成される。右側固定板３５は、板幅方向ＨＵにおいて、左側固定板３４に間隔を隔てて並設される。右側固定板３５は、板厚さ方向ＵＴにおいて、バネ受け平板３１と直交して延在される。右側固定板３５は、板厚さ方向ＵＴにおいて、バネ受け平板３１の他方の板端３１Ｆ（板右端３１Ｆ）からバネ受け平板３１のバネ受け板裏平面３１Ｂ側に突出される。
右側固定板３５は、板前後方向ＵＦにおいて、前側固定板３２から後側固定板３３に向けて延在される。
これにより、右側固定板３５は、板幅方向ＵＨにおいて、固定板表平面３５Ａ及び固定板裏平面３５Ｂを有する。 The right side fixing plate 35 is formed in the same shape as the left side fixing plate 34 as shown in FIGS. 1, 2, 6, 7, 11, 12, and 25 to 31. The right side fixing plate 35 is integrally formed with the spring receiving flat plate 31 in the plate width direction UH, continuous with the other plate end 31F of the spring receiving flat plate 31. The right side fixing plate 35 is arranged side by side with the left side fixing plate 34 at intervals in the plate width direction HU. The right side fixing plate 35 extends orthogonally to the spring receiving flat plate 31 in the plate thickness direction UT. The right side fixing plate 35 projects from the other plate end 31F (plate right end 31F) of the spring receiving flat plate 31 toward the spring receiving plate back plane 31B side of the spring receiving flat plate 31 in the plate thickness direction UT.
The right side fixing plate 35 extends from the front side fixing plate 32 toward the rear side fixing plate 33 in the plate front-rear direction UF.
As a result, the right side fixing plate 35 has the fixing plate front plane 35A and the fixing plate back plane 35B in the plate width direction UH.

右側固定板３５は、右側固定板片３８を有する。右側固定板片３８は、板厚さ方向ＵＴにおいて、右側固定板３５の右側板端３５Ｃに一体に形成される。右側固定板片３８は、板幅方向ＵＨにおいて、固定板表平面３５Ａから突出されて、前側固定板片３６と連続して形成される。
右側固定板片３８は、右側クッション部９のクッション端９Ｃに倣った形状に形成される。右側固定板片３８は、板前後方向ＵＦにおいて、前側固定板片３６（前側固定板３２）から後側固定板３３に向けて延在される。 The right side fixing plate 35 has a right side fixing plate piece 38. The right side fixing plate piece 38 is integrally formed with the right side plate end 35C of the right side fixing plate 35 in the plate thickness direction UT. The right side fixing plate piece 38 protrudes from the fixing plate surface plane 35A in the plate width direction UH and is formed continuously with the front side fixing plate piece 36.
The right side fixing plate piece 38 is formed in a shape that follows the cushion end 9C of the right side cushion portion 9. The right side fixing plate piece 38 extends from the front side fixing plate piece 36 (front side fixing plate 32) toward the rear side fixing plate 33 in the plate front-rear direction UF.

バネ受け材３は、図１乃至図９に示すように、網材収納凹所１０を閉塞（閉鎖）して、クッション材１に固定される。バネ受け材３は、網材収納凹所１０に挿入（収納）した三次元立体網状材２を支持して、クッション材１に固定される。 As shown in FIGS. 1 to 9, the spring receiving material 3 closes (closes) the net material storage recess 10 and is fixed to the cushion material 1. The spring receiving material 3 supports the three-dimensional three-dimensional net-like material 2 inserted (stored) in the net material storage recess 10 and is fixed to the cushion material 1.

バネ受け材３は、図８、図９、図１１及び図１２に示すように、前側固定板３２をクッション材１の前側クッション部６に向け、及びバネ受け平板３１のバネ受け板表平面３１Ａを各クッション部６〜８のクッション端６Ｃ〜８Ｃ（網材収納凹所１０に挿入された三次元立体網状材２の網材裏平面２Ｂ）に向けて配置される。 As shown in FIGS. 8, 9, 11 and 12, the spring receiving material 3 has the front fixing plate 32 directed toward the front cushion portion 6 of the cushion material 1 and the spring receiving plate surface plane 31A of the spring receiving flat plate 31. Is arranged toward the cushion ends 6C to 8C of each of the cushion portions 6 to 8 (the net material back plane 2B of the three-dimensional three-dimensional net-like material 2 inserted into the net material storage recess 10).

バネ受け材３は、図８に示すように、前側固定板３２の固定板表平面３２Ａを前側クッション部６のクッション内側平面６Ｂに当接し、及び後側固定板３３の固定板裏面３３Ｂを後側クッション部７のクッション端７Ｃ及びクッション外側面７Ａに当接して配置される。バネ受け材３は、左側固定板３４の固定板表平面３４Ａを左側クッション部８のクッション内側平面８Ｂに当接し、及び右側固定板３５の固定板表平面３５Ａを右側クッション部９のクッション内側平面９Ｂに当接して配置される。
バネ受け材３は、図８及び図９に示すように、バネ受け平板３１のバネ受け表平面３１Ａの全面を、網材収納凹所１０の挿入（収納）した三次元立体網状材２の網材裏平面２Ｂの全面に当接して配置される。 As shown in FIG. 8, the spring receiving member 3 abuts the fixing plate front plane 32A of the front fixing plate 32 against the cushion inner plane 6B of the front cushion portion 6, and rear of the fixing plate back surface 33B of the rear fixing plate 33. The side cushion portion 7 is arranged in contact with the cushion end 7C and the cushion outer surface 7A. In the spring receiving material 3, the fixing plate surface plane 34A of the left side fixing plate 34 is in contact with the cushion inner surface surface 8B of the left side cushion portion 8, and the fixing plate surface surface 35A of the right side fixing plate 35 is brought into contact with the cushion inner surface surface of the right side cushion portion 9. It is placed in contact with 9B.
As shown in FIGS. 8 and 9, the spring receiving material 3 is a net of a three-dimensional three-dimensional net-like material 2 in which the entire surface of the spring receiving surface plane 31A of the spring receiving flat plate 31 is inserted (stored) in the net material storage recess 10. It is arranged in contact with the entire surface of the material back surface 2B.

バネ受け材３は、図８に示すように、前側固定板片３６を前側クッション部６のクッション端６Ｃに当接し、左側固定板片３７を左側クッション部８のクッション端８Ｃに当接し、及び右側固定板片３８を右側クッション部９のクッション端９Ｃに当接して配置される。 As shown in FIG. 8, the spring receiving member 3 abuts the front side fixing plate piece 36 against the cushion end 6C of the front side cushion portion 6, the left side fixing plate piece 37 abuts against the cushion end 8C of the left side cushion portion 8, and The right side fixing plate piece 38 is placed in contact with the cushion end 9C of the right side cushion portion 9.

バネ受け材３は、前側固定板３２（固定板表平面３２Ａ）を前側クッション部６（クッション内側平面６Ｂ）に接着剤で接着し、及び後側固定板３３（固定板裏面３３Ｂ）を後側クッション部７（クッション外側面７Ａ及びクッション端７Ｃ）に接着剤で接着して、クッション材１に固定される。バネ受け材３は、左側固定板３４（固定板表平面３４Ａ）を左側クッション部８（クッション内側平面８Ｂ）に接着剤で接着し、及び右側固定板３５（固定板表平面３５Ａ）を右側クッション部９（クッション内側平面９Ｂ）に接着剤で接着して、クッション材１に固定される。バネ受け材３は、バネ受け平板３１（バネ受け板表平面３１Ａ）を、左側及び右側クッション部８，９（各クッション端８Ｃ，９Ｃ）に接着剤で接着して、クッション材１に固定される。
バネ受け材３は、各固定板片３６〜３８を、後側クッション部７を除く各クッション部６，８，９のクッション端６Ｃ，８Ｃ，９Ｃの夫々に接着剤で接着して、クッション材１に固定される。
これにより、バネ受け材３は、バネ受け平板３１にて網材収納凹所１０を閉塞（閉鎖）して、三次元立体網状材２をクッション材１の内側に配置する。バネ受け材３は、バネ受け表平面３１Ａを三次元立体網状材２の網材裏平面２Ｂに当接して、バネ受け平板３１にて三次元立体網状材２を支持する。 In the spring receiving material 3, the front fixing plate 32 (fixing plate front plane 32A) is adhered to the front cushion portion 6 (cushion inner plane 6B) with an adhesive, and the rear fixing plate 33 (fixing plate back surface 33B) is attached to the rear side. It is adhered to the cushion portion 7 (cushion outer surface 7A and cushion end 7C) with an adhesive and fixed to the cushion material 1. In the spring receiving material 3, the left side fixing plate 34 (fixing plate surface plane 34A) is adhered to the left side cushion portion 8 (cushion inner surface surface 8B) with an adhesive, and the right side fixing plate 35 (fixing plate surface plane 35A) is attached to the right side cushion. It is adhered to the portion 9 (cushion inner flat surface 9B) with an adhesive and fixed to the cushion material 1. The spring receiving material 3 is fixed to the cushion material 1 by adhering the spring receiving flat plate 31 (spring receiving plate surface plane 31A) to the left and right cushion portions 8 and 9 (each cushion ends 8C and 9C) with an adhesive. NS.
The spring receiving material 3 is a cushioning material obtained by adhering each of the fixing plate pieces 36 to 38 to the cushion ends 6C, 8C, 9C of each of the cushion portions 6, 8 and 9 excluding the rear cushion portion 7 with an adhesive. It is fixed at 1.
As a result, the spring receiving material 3 closes (closes) the net material storage recess 10 with the spring receiving flat plate 31, and arranges the three-dimensional three-dimensional net-like material 2 inside the cushion material 1. In the spring receiving material 3, the spring receiving front plane 31A is in contact with the net material back plane 2B of the three-dimensional three-dimensional net-like material 2, and the spring receiving flat plate 31 supports the three-dimensional three-dimensional net-like material 2.

座席用クッションＸは、図８及び図９に示すように、クッション材１の膨出裏平面１７及び三次元立体網状材２の網材着座平面２２を当接する。
これにより、座席用クッションＸは、着座平面１６（着座凹み部１５）において、前側裏位置Ｐ２（前側網材裏位置Ｐ３）から後側クッション部７側（三次元立体網状材２の網板端７Ｄ）に向けて、段々（徐々）にクッション性である弾性力（バネ力／バネ定数）を高くする構造となる。 As shown in FIGS. 8 and 9, the seat cushion X abuts the bulging back plane 17 of the cushion material 1 and the net material seating plane 22 of the three-dimensional three-dimensional net-like material 2.
As a result, the seat cushion X has the seating plane 16 (seat recessed portion 15) from the front side back position P2 (front side net material back position P3) to the rear side cushion portion 7 side (three-dimensional three-dimensional net material 2 net plate end). The structure is such that the elastic force (spring force / spring constant), which is a cushioning property, is gradually (gradually) increased toward 7D).

座席用クッションＸ（座席用クッションパッド）は、図８及び図９に示すように、例えば、鉄道車両の車両用座席に使用される。座席用クッションは、バネ受け材３（三次元立体網状材２の網材裏平面２Ｂ）から車両座席に固定される。着座者（乗客／人）は、着座時、クッション前後方向ＣＦにおいて、着座者の大腿部を着座凹み部１５（着座平面１６）より前側、即ち、前側クッション部６側であって、着座側クッション部５のクッション端５Ｃ（クッション前端５Ｃ）及び前側表位置Ｐ１の間に位置して、着座者の臀部を着座平面１６に当接して、着座凹み部１５に着座する。 As shown in FIGS. 8 and 9, the seat cushion X (seat cushion pad) is used, for example, in a vehicle seat of a railroad vehicle. The seat cushion is fixed to the vehicle seat from the spring receiving material 3 (the net material back plane 2B of the three-dimensional three-dimensional net-like material 2). When seated, the seated person (passenger / person) places the thigh of the seated person in front of the seating recess 15 (seat plane 16), that is, the front side cushion part 6 side and the seating side in the cushion front-rear direction CF. Located between the cushion end 5C (cushion front end 5C) and the front front position P1 of the cushion portion 5, the buttock portion of the seated person is brought into contact with the seating plane 16 and seated in the seating recessed portion 15.

座席用クッションＸにおいて、クッション材１は、図３３に示すように、着座平面１６及び膨出裏平面１７の間において、繊維構造体４（繊維構造シート）をクッション厚さ方向ＣＴに複数積層して形成できる（複数重ねて形成される）。繊維構造体４は、例えば、クッション前後方向ＣＲにおいて、前側クッション部６のクッション端６Ｃ及び後側クッション部７のクッション端７Ｃの間に延在されて、各クッション端６Ｃ，６Ｃで折返されて複数積層される。
これにより、クッション材１は、着座平面１６及び膨出裏平面１７の間において、クッション厚さ方向ＣＴに繊維構造体４を複数積層した横繊維構造となる。 In the seat cushion X, as shown in FIG. 33, the cushion material 1 has a plurality of fiber structures 4 (fiber structure sheets) laminated in the cushion thickness direction CT between the seating plane 16 and the bulging back plane 17. Can be formed (multiple layers are formed). The fiber structure 4 extends between the cushion end 6C of the front cushion portion 6 and the cushion end 7C of the rear cushion portion 7 in the front-rear direction CR of the cushion, and is folded back at the cushion ends 6C and 6C, respectively. Multiple layers are stacked.
As a result, the cushion material 1 has a horizontal fiber structure in which a plurality of fiber structures 4 are laminated in the cushion thickness direction CT between the seating plane 16 and the bulging back plane 17.

次に、本発明に係る座席用クッション（座席用クッションパッド）の製造方法について、図３４乃至図４７等を参照して説明する。
なお、図３４乃至図４７において、図１乃至図３３と同一符号は、同一部材、同一構成であるので、その詳細な説明は省略する。 Next, a method of manufacturing a seat cushion (seat cushion pad) according to the present invention will be described with reference to FIGS. 34 to 47 and the like.
In FIGS. 34 to 47, the same reference numerals as those in FIGS. 1 to 33 have the same members and the same configuration, and thus detailed description thereof will be omitted.

座席用クッションＸは、第１工程乃至第８工程を実施して、座席用クッションＸ（座席用クッションパッド）を形成（製造）する。 The seat cushion X is formed (manufactured) by carrying out the first to eighth steps to form (manufacture) the seat cushion X (seat cushion pad).

＜第１工程／繊維構造シート製造工程＞
第１工程は、図３４乃至図３７に示すように、繊維構造体４を複数積層して繊維構造シート５１を形成する。
繊維構造シート５１は、例えば、矩形状（正方形又は長方形）に形成され、シート厚さ方向ＳＴにシート厚さ：ＴＨを有する。繊維構造シート５１は、シート厚さ方向ＳＴにシート表平面５１Ａ及びシート裏平面５１Ｂを有する。 <1st process / Fiber structure sheet manufacturing process>
In the first step, as shown in FIGS. 34 to 37, a plurality of fiber structures 4 are laminated to form a fiber structure sheet 51.
The fiber structure sheet 51 is formed in a rectangular shape (square or rectangular shape), for example, and has a sheet thickness: TH in the sheet thickness direction ST. The fiber structure sheet 51 has a sheet front plane 51A and a sheet back plane 51B in the sheet thickness direction ST.

第１工程において、繊維構造シート５１は、図３６に示すように、シート厚さ方向ＳＴと直交するシート前後方向ＳＦにおいて、繊維構造体４をシート前後方向ＳＦに複数積層して形成される。繊維構造シート５１において、繊維構造体４は、図３６に示すように、シート厚さ方向ＳＴにシート厚さ：ＴＨを有して延在され、及びシート厚さ：ＴＨで折返されて複数積層される。
繊維構造シート５１は、複数積層した繊維構造体４を加熱して、溶融したバインダ繊維及び主体繊維を熱接着して形成される。
これにより、繊維構造シート５１は、図３６に示すように、シート前後方向ＳＦに繊維構造体４を複数積層した縦繊維構造となる。 In the first step, as shown in FIG. 36, the fiber structure sheet 51 is formed by laminating a plurality of fiber structures 4 in the sheet front-rear direction SF in the sheet front-rear direction SF orthogonal to the sheet thickness direction ST. In the fiber structure sheet 51, as shown in FIG. 36, the fiber structure 4 is extended with a sheet thickness: TH in the sheet thickness direction ST, and is folded back at the sheet thickness: TH to form a plurality of layers. Will be done.
The fiber structure sheet 51 is formed by heating a plurality of laminated fiber structures 4 and heat-bonding the molten binder fibers and main fibers.
As a result, as shown in FIG. 36, the fiber structure sheet 51 has a vertical fiber structure in which a plurality of fiber structures 4 are laminated in the front-rear direction SF of the sheet.

第１工程において、繊維構造シート５１は、図３７に示すように、繊維構造体４をシート厚さ方向ＳＴに複数積層して形成される。繊維構造シート５１は、複数積層した繊維構造体４を加熱して、溶融したバインダ繊維及び主体繊維を熱接着して形成される。
これにより、繊維構造シート５１は、図３７に示すように、シート厚さ方向ＳＴに繊維構造体４を複数積層した横繊維構造となる。 In the first step, as shown in FIG. 37, the fiber structure sheet 51 is formed by laminating a plurality of fiber structures 4 in the sheet thickness direction ST. The fiber structure sheet 51 is formed by heating a plurality of laminated fiber structures 4 and heat-bonding the molten binder fibers and main fibers.
As a result, as shown in FIG. 37, the fiber structure sheet 51 has a horizontal fiber structure in which a plurality of fiber structures 4 are laminated in the sheet thickness direction ST.

第１工程において、繊維構造シート５１は、縦繊維構造（図３６参照）、又は横繊維構造（図３７参照）を選択して形成される。 In the first step, the fiber structure sheet 51 is formed by selecting a warp fiber structure (see FIG. 36) or a transverse fiber structure (see FIG. 37).

＜第２工程／原型シート製造工程＞
第２工程は、図３８及び図３９に示すように、繊維構造シート５１のシート厚さ方向ＳＴのシート表平面５１Ａ及びシート裏平面５１Ｂから型押しして、繊維構造シート５１に原型シート５５を成形する。
原型シート５５は、繊維構造シート５１をシート厚さ方向ＳＴから、シート表平面５１Ａ及びシート裏平面５１Ｂを型押しして、繊維構造シート５１に成形される。原型シート５５は、クッション材１を展開したシート（展開原型シート）である。 <Second process / Prototype sheet manufacturing process>
In the second step, as shown in FIGS. 38 and 39, the prototype sheet 55 is embossed on the fiber structure sheet 51 from the sheet front plane 51A and the sheet back plane 51B in the sheet thickness direction ST of the fiber structure sheet 51. Mold.
The prototype sheet 55 is formed into the fiber structure sheet 51 by embossing the fiber structure sheet 51 from the sheet thickness direction ST on the sheet front plane 51A and the sheet back plane 51B. The prototype sheet 55 is a sheet (developed prototype sheet) in which the cushion material 1 is developed.

第２工程では、原型シート５５は、上金型及び下金型（図示しない）を繊維構造シート５１に型押しして、繊維構造シート５１に成形される。
第２工程において、繊維構造シート５１は、シート表平面５１Ａを上金型に向け、シート裏平面５１Ｂを下金型に向けて、上金型及び下金型の間に配置される。上金型及び下金型は、繊維構造シート５１のシート厚さ方向ＳＴからシート表平面５１Ａ及びシート裏平面５１Ｂに型押しされて（押付けられて）、原型シート５５を繊維構造シート５１に成形する。 In the second step, the prototype sheet 55 is formed into the fiber structure sheet 51 by embossing the upper die and the lower die (not shown) onto the fiber structure sheet 51.
In the second step, the fiber structure sheet 51 is arranged between the upper mold and the lower mold with the sheet front plane 51A facing the upper mold and the sheet back plane 51B facing the lower mold. The upper mold and the lower mold are embossed (pressed) on the sheet front plane 51A and the sheet back plane 51B from the sheet thickness direction ST of the fiber structure sheet 51, and the prototype sheet 55 is formed into the fiber structure sheet 51. do.

第２工程にいて、原型シート５５は、図３８及び図３９に示すように、クッション材１の着座側クッション部５、前側クッション部６、後側クッション部７、左側クッション部８及び右側クッション部９を繊維構造シート５１に型押しして成形される。 In the second step, as shown in FIGS. 38 and 39, the prototype seat 55 has a seating side cushion portion 5, a front side cushion portion 6, a rear side cushion portion 7, a left side cushion portion 8 and a right side cushion portion of the cushion material 1. 9 is embossed on the fiber structure sheet 51 to be molded.

原型シート５５において、着座側クッション部５は、図３８及び図３９に示すように、例えば、矩形状（正方形又は長方形）のシートとして、繊維構造シート５１（シート表平面５１Ａ及びシート裏平面５１Ｂ）に型押しされる。
着座側クッション部５は、繊維構造シート５１のシート前後方向ＳＦであって、クッション前後方向ＣＦに各クッション端５Ｃ，５Ｄ（矩形状の各クッション辺５Ｃ，５Ｄ）を有し、繊維構造シート５１のシート幅方向ＳＨであって、クッション幅方向ＣＨに各クッション端５Ｅ，５Ｆ（矩形状の各クッション辺５Ｅ，５Ｆ）を有する。なお、繊維構造シート５１のシート幅方向ＳＨは、シート厚さ方向ＳＴ及びシート前後方向ＳＦと直交する方向である。 In the prototype seat 55, as shown in FIGS. 38 and 39, the seating side cushion portion 5 is, for example, a rectangular (square or rectangular) sheet with a fiber structure sheet 51 (seat front plane 51A and seat back plane 51B). Is embossed on.
The seating side cushion portion 5 is a seat front-rear direction SF of the fiber structure sheet 51, and has cushion ends 5C and 5D (rectangular cushion sides 5C and 5D) in the cushion front-rear direction CF, and the fiber structure sheet 51. SH in the seat width direction, and each cushion end 5E, 5F (rectangular cushion side 5E, 5F) is provided in the cushion width direction CH. The sheet width direction SH of the fiber structure sheet 51 is a direction orthogonal to the sheet thickness direction ST and the sheet front-rear direction SF.

原型シート５５において、前側クッション部６は、図３８及び図３９に示すように、繊維構造シート５１のシート前後方向ＳＦであって、着座側クッション部５のクッション前後方向ＣＦの他方のクッション端５Ｃ（クッション前端５Ｃ／クッション前辺５Ｃ）に沿って着座側クッション部５に連続して、繊維構造シート５１（シート表平面５１Ａ及びシート裏平面５１Ｂ）に型押しされる。
前側クッション部６は、着座側クッション部５の他方のクッション端５Ｃ（クッション前端５Ｃ／クッション前辺５Ｃ）からクッション前後方向ＣＦ（シート前後方向ＳＦ）にクッション長さ：ＫＡを有して型押しされる。 In the prototype seat 55, as shown in FIGS. 38 and 39, the front cushion portion 6 is the seat front-rear direction SF of the fiber structure sheet 51, and the other cushion end 5C of the cushion front-rear direction CF of the seating side cushion portion 5. The fiber structure sheet 51 (seat front plane 51A and seat back plane 51B) is continuously embossed along the seating side cushion portion 5 along (cushion front end 5C / cushion front side 5C).
The front cushion portion 6 has a cushion length: KA from the other cushion end 5C (cushion front end 5C / cushion front side 5C) of the seating side cushion portion 5 to the cushion front-rear direction CF (seat front-rear direction SF) and is embossed. Will be done.

原型シート５５において、後側クッション部７は、図３８及び図３９に示すように、着座側クッション部５のクッション前後方向ＣＦの一方のクッション端５Ｄ（クッション後端５Ｄ／クッション後辺５Ｄ）に沿って着座側クッション部５に連続して、繊維構造シート５１（シート表平面５１Ａ及びシート裏平面５１Ｂ）に型押しされる。
後側クッション部７は、着座側クッション部５の一方のクッション端５Ｄ（クッション後端５Ｄ／クッション後辺５Ｄ）からクッション前後方向ＣＦ（シート前後方向ＳＦ）に面長さ：ＫＢを有して型押しされる。 In the prototype seat 55, as shown in FIGS. 38 and 39, the rear cushion portion 7 is located at one cushion end 5D (cushion rear end 5D / cushion rear side 5D) of the cushion front-rear direction CF of the seating side cushion portion 5. Along the seating side cushion portion 5, the fiber structure sheet 51 (seat front plane 51A and seat back plane 51B) is embossed.
The rear cushion portion 7 has a surface length: KB from one cushion end 5D (cushion rear end 5D / cushion rear side 5D) of the seating side cushion portion 5 to the cushion front-rear direction CF (seat front-rear direction SF). Embossed.

原型シート５５において、左側クッション部８は、図３８及び図３９に示すように、繊維構造シート５１のシート幅方向ＳＨであって、着座側クッション部５のクッション幅方向ＣＨの一方のクッション端５Ｅ（クッション左端５Ｅ／クッション左辺５Ｅ）に沿って着座側クッション部５に連続して、繊維構造シート５１（シート表平面５１Ａ及びシート裏平面５１Ｂ）に型押しされる。
左側クッション部８は、着座側クッション部５の一方のクッション端５Ｅ（クッション左端５Ｅ／クッション左辺５Ｅ）からクッション幅方向ＣＨ（シート幅方向ＳＨ）にクッション長さ：ＫＡを有して型押しされる。 In the prototype seat 55, as shown in FIGS. 38 and 39, the left side cushion portion 8 is the seat width direction SH of the fiber structure sheet 51, and one cushion end 5E of the cushion width direction CH of the seating side cushion portion 5. The fiber structure sheet 51 (seat front plane 51A and seat back plane 51B) is continuously embossed along the seating side cushion portion 5 along (the left end 5E of the cushion / the left side 5E of the cushion).
The left side cushion portion 8 is embossed with a cushion length: KA from one cushion end 5E (cushion left end 5E / cushion left side 5E) of the seating side cushion portion 5 to the cushion width direction CH (seat width direction SH). NS.

原型シート５５において、右側クッション部９は、図３８及び図３９に示すように、例えば、左側クッション部８と同一形状に成形される。右側クッション部９は、着座側クッション部５のクッション幅方向ＣＨの他方のクッション端５Ｆ（クッション右端５Ｆ／クッション右辺５Ｆ）に沿って着座側クッション部５に連続して、繊維構造シート５１（シート表平面５１Ａ及びシート裏平面５１Ｂ）に型押しされる。
右側クッション部９は、着座側クッション部５の他方のクッション端５Ｆ（クッション右端５Ｆ／クッション右辺５Ｆ）からクッション幅方向ＣＨ（シート幅方向ＳＨ）のクッション長さ：ＫＡを有し型押しされる。 In the prototype sheet 55, the right side cushion portion 9 is formed into, for example, the same shape as the left side cushion portion 8 as shown in FIGS. 38 and 39. The right side cushion portion 9 is continuous with the seating side cushion portion 5 along the other cushion end 5F (cushion right end 5F / cushion right side 5F) of the seating side cushion portion 5 in the cushion width direction CH, and is a fiber structure sheet 51 (seat). It is embossed on the front plane 51A and the sheet back plane 51B).
The right side cushion portion 9 has a cushion length: KA in the cushion width direction CH (seat width direction SH) from the other cushion end 5F (cushion right end 5F / cushion right side 5F) of the seating side cushion portion 5 and is embossed. ..

原型シート５５は、図３８及び図３９に示すように、クッション幅方向ＣＨのクッション幅中心線Ｃｆを境として対称（左右対称）に成形される。 As shown in FIGS. 38 and 39, the prototype sheet 55 is formed symmetrically (symmetrically) with the cushion width center line Cf in the cushion width direction CH as a boundary.

第２工程において、原型シート５５は、図３８及び図３９に示すように、着座凹み部１５を繊維構造シート５１（シート表平面５１Ａ及びシート裏平面５１Ｂ）に型押しして成形される。 In the second step, the prototype sheet 55 is formed by embossing the seating recess 15 onto the fiber structure sheet 51 (seat front plane 51A and sheet back plane 51B) as shown in FIGS. 38 and 39.

原型シート５５において、着座凹み部１５は、図３８及び図３９に示すように、着座側クッション部５に位置する繊維構造シート５１（シート表平面５１Ａ及びシート裏平面５１Ｂ）に型押しされる。
着座凹み部１５は、着座側クッション部５のシート幅方向ＣＨ（シート幅方向ＳＨ）のクッション幅中心線Ｃｆを境として対称（左右対称）に成形される。 In the prototype seat 55, the seating recess 15 is embossed on the fiber structure sheet 51 (seat front plane 51A and seat back plane 51B) located in the seating side cushion portion 5, as shown in FIGS. 38 and 39.
The seating recessed portion 15 is formed symmetrically (symmetrically) with the cushion width center line Cf in the seat width direction CH (seat width direction SH) of the seating side cushion portion 5 as a boundary.

着座凹み部１５は、着座側クッション部５のクッション表平面５Ａ（繊維構造シート５１のシート表平面５１Ａ）の一部の着座平面１６をクッション厚さ方向ＣＴ（シート厚さ方向ＳＴ）に凹ませて、着座平面１６に対向するクッション裏平面５Ｂ（繊維構造シート５１のシート裏平面５１Ｂ）の一部の膨出裏平面１７を着座側クッション部５のクッション裏平面５Ｂ（シート裏平面５１Ｂ）から膨出して、着座側クッション部５に位置する繊維構造シート５１（シート表平面５１Ａ及びシート裏平面５１Ｂ）に型押しされる。 The seating recessed portion 15 dents a part of the seating plane 16 of the cushion surface plane 5A (seat surface plane 51A of the fiber structure sheet 51) of the seating side cushion portion 5 in the cushion thickness direction CT (seat thickness direction ST). Then, a part of the bulging back plane 17 of the cushion back plane 5B (seat back plane 51B of the fiber structure sheet 51) facing the seating plane 16 is formed from the cushion back plane 5B (seat back plane 51B) of the seating side cushion portion 5. It bulges and is embossed on the fiber structure sheet 51 (seat front plane 51A and seat back plane 51B) located on the seating side cushion portion 5.

原型シート５５において、着座凹み部１５は、着座平面１６及び膨出裏平面１７の間に略均一（略同一）なクッション厚さ：Ｔを有して、着座側クッション部５の位置する繊維構造シート５１（シート表平面５１Ａ及びシート裏平面５１Ｂ）に型押しされる。 In the prototype seat 55, the seating recess 15 has a substantially uniform (substantially the same) cushion thickness: T between the seating plane 16 and the bulging back plane 17, and has a fiber structure in which the seating side cushion portion 5 is located. It is embossed on the sheet 51 (seat front plane 51A and seat back plane 51B).

原型シート５５において、着座平面１６は、図３８に示すように、クッション前後方向ＣＦ（シート前後方向ＳＦ）において、着座側クッション部５の他方のクッション端５Ｃ（クッション前端５Ｃ／クッション前辺５Ｃ）に間隔を隔てる前側表位置Ｐ１から傾斜されて、着座側クッション部５に位置する繊維構造シート５１（シート表平面５１Ａ）に型押しされる。
着座平面１６は、着座側クッション部５のクッション表平面５Ａ（シート表平面５１Ａ）からクッション裏平面５Ｂ側（シート裏平面５１Ｂ側）に傾斜しつつ、着座側クッション部５のクッション前後方向ＣＦ（シート前後方向ＳＦ）の一方のクッション端５Ｄ側（クッション後端５Ｄ側／クッション後辺５Ｄ側）に延在して、着座側クッション部５に位置する繊維構造シート５１（シート表平面５１Ａ）に型押しされる。 In the prototype seat 55, as shown in FIG. 38, the seating plane 16 is the other cushion end 5C (cushion front end 5C / cushion front side 5C) of the seating side cushion portion 5 in the cushion front-rear direction CF (seat front-rear direction SF). It is inclined from the front side front position P1 and is embossed on the fiber structure sheet 51 (seat front plane 51A) located at the seating side cushion portion 5.
The seating plane 16 is inclined from the cushion front plane 5A (seat front plane 51A) of the seating side cushion portion 5 to the cushion back plane 5B side (seat back plane 51B side), and the seat front-rear direction CF of the seating side cushion portion 5 (seat back plane 51B side). It extends to one cushion end 5D side (seat rear end 5D side / cushion rear side 5D side) of the seat front-rear direction SF) and extends to the fiber structure sheet 51 (seat surface plane 51A) located on the seating side cushion portion 5. Embossed.

原型シート５５において、着座平面１６は、図３８に示すように、前側表位置Ｐ１にクッション幅方向ＣＨ（シート幅方向ＳＨ）の面幅：ＨＡ、及びクッション前後方向ＣＦ（シート前後方向ＳＦ）の一方のクッション端５Ｄ側（クッション後端５Ｄ側／クッション後辺５Ｄ側）にクッション幅方向ＣＨ（シート幅方向ＳＴ）の面幅：ＨＢを有して、着座側クッション部５に位置する繊維構造シート５１（シート表平面５１Ａ）に型押しされる。
着座平面１６は、クッション前後方向ＣＦ（シート前後方向ＳＦ）において、前側表位置Ｐ１から段々（徐々）に縮幅（面幅を縮小）しつつ、一方のクッション端５Ｄ側（クッション後端５Ｄ側／クッション後辺５Ｄ側）に延在される。
着座平面１６は、前側表位置Ｐ１からクッション端５Ｄ側（クッション後端５Ｄ側／クッション後辺５Ｄ側）に向けてクッション前後方向ＣＦ（シート前後方向ＳＦ）の面長さ：ＬＡを有して、着座側クッション部５に位置する繊維構造シート５１（シート表平面５１Ａ）に型押しされる。 In the prototype seat 55, as shown in FIG. 38, the seating plane 16 has a surface width in the cushion width direction CH (seat width direction SH): HA and a cushion front-rear direction CF (seat front-rear direction SF) at the front side front position P1. A fiber structure having a surface width in the cushion width direction CH (seat width direction ST): HB on one cushion end 5D side (cushion rear end 5D side / cushion rear side 5D side) and located on the seating side cushion portion 5. It is embossed on the sheet 51 (sheet surface plane 51A).
In the seat front-rear direction CF (seat front-rear direction SF), the seating plane 16 gradually (gradually reduces) the width (reducing the surface width) from the front side front position P1 and one cushion end 5D side (cushion rear end 5D side). / It extends to the rear side of the cushion (5D side).
The seating plane 16 has a surface length: LA in the cushion front-rear direction CF (seat front-rear direction SF) from the front side front position P1 toward the cushion end 5D side (cushion rear end 5D side / cushion rear side 5D side). , It is embossed on the fiber structure sheet 51 (seat surface plane 51A) located on the seating side cushion portion 5.

原型シート５５において、膨出裏平面１７は、図３９に示すように、クッション前後方向ＣＦ（シート前後方向ＳＦ）に間隔を隔てる前側裏位置Ｐ２から傾斜されて、着座側クッション部５に位置する繊維構造シート５１（シート裏平面５１Ｂ）に型押しされる。
膨出裏平面１７は、着座側クッション部５のクッション裏平面５Ｂ（シート裏平面５１Ｂ）から傾斜しつつ、着座側クッション部５のクッション前後方向ＣＦ（シート前後方向ＳＦ）の一方のクッション端５Ｄ側（クッション後端５Ｄ側／クッション後辺５Ｄ側）に延在して、着座側クッション部５に位置する繊維構造シート５１（シート裏平面５１Ｂ）に型押しされる。 In the prototype seat 55, as shown in FIG. 39, the bulging back plane 17 is inclined from the front back position P2 separated by the cushion front-rear direction CF (seat front-rear direction SF) and is located on the seating side cushion portion 5. It is embossed on the fiber structure sheet 51 (sheet back surface 51B).
The bulging back plane 17 is inclined from the cushion back plane 5B (seat back plane 51B) of the seating side cushion portion 5, and one cushion end 5D of the seat front-rear direction CF (seat front-rear direction SF) of the seating side cushion portion 5. It extends to the side (5D side at the rear end of the cushion / 5D side at the rear side of the cushion) and is embossed on the fiber structure sheet 51 (seat back plane 51B) located at the seating side cushion portion 5.

原型シート５５において、膨出裏平面１７は、図３９に示すように、前側裏位置Ｐ２にクッション幅方向ＣＨ（シート幅方向ＳＨ）の面幅：ＨＣ、及びクッション前後方向ＣＦ（シート前後方向ＳＦ）の一方のクッション端５Ｄ側（クッション後端５Ｄ側／クッション後辺５Ｄ側）にクッション幅方向ＣＨ（シート幅方向ＳＨ）の面幅：ＨＤを有して、着座側クッション部５に位置する繊維構造シート５１（シート裏平面５１Ｂ）に型押しされる。
膨出裏平面１７は、クッション前後方向ＣＦ（シート前後方向ＳＦ）において、前側裏位置Ｐ２から段々（徐々）に縮幅（面幅を縮小）しつつ、一方のクッション端５Ｄ側（クッション後端５Ｄ側／クッション後辺５Ｄ側）に延在される。
膨出裏平面１７は、前側裏位置Ｐ２からクッション端５Ｄ側（クッション後端５Ｄ側／クッション後辺５Ｄ側）に向けてクッション前後方向ＣＨ（シート前後方向ＳＦ）の面長さ：ＬＢを有して、着座側クッション部５に位置する繊維構造シート５１（シート裏平面５１Ｂ）に型押しされる。 In the prototype seat 55, as shown in FIG. 39, the bulging back plane 17 has a surface width of the cushion width direction CH (seat width direction SH) at the front side back position P2: HC and a cushion front-rear direction CF (seat front-rear direction SF). ) On one cushion end 5D side (cushion rear end 5D side / cushion rear side 5D side), has a surface width in the cushion width direction CH (seat width direction SH): HD, and is located on the seating side cushion portion 5. It is embossed on the fiber structure sheet 51 (sheet back surface 51B).
In the cushion front-rear direction CF (seat front-rear direction SF), the bulging back plane 17 gradually (gradually reduces) the width (reducing the surface width) from the front back position P2, while one cushion end 5D side (cushion rear end). It extends to the 5D side / the rear side of the cushion 5D side).
The bulging back plane 17 has a surface length of the cushion front-rear direction CH (seat front-rear direction SF) from the front side back position P2 toward the cushion end 5D side (cushion rear end 5D side / cushion rear side 5D side): LB. Then, it is embossed on the fiber structure sheet 51 (seat back plane 51B) located on the seating side cushion portion 5.

第２工程において、原型シート５５は、図３８及び図３９に示すように、クッション材１の着座側クッション部５、前側クッション部６、後側クッション部７、左側クッション部８、右側クッション部９、着座平面１６及び膨出裏平面１７を有する着座凹み部１５を、繊維構造シート５１（シート表平面５１Ａ、シート裏平面５１Ｂ）に型押しして、繊維構造シート５１に成形される。 In the second step, as shown in FIGS. 38 and 39, the prototype seat 55 has the seating side cushion portion 5, the front side cushion portion 6, the rear side cushion portion 7, the left side cushion portion 8, and the right side cushion portion 9 of the cushion material 1. The seating recess 15 having the seating plane 16 and the bulging back plane 17 is embossed on the fiber structure sheet 51 (seat front plane 51A, sheet back plane 51B) to be formed into the fiber structure sheet 51.

＜第３工程／三次元立体網状材製造工程＞
第３工程は、三次元立体網状材２の網材厚さ方向ＢＴの網材表平面２Ａの一部において、線条ＰＥを網材厚さ方向ＢＴの網材裏平面２Ｂ側に熱圧縮（加熱圧縮／圧縮）して、膨出裏平面１７に倣った網材着座平面２２を有する網材着座凹み部２１を、三次元立体網状材２に形成する。 <Third process / Three-dimensional three-dimensional net material manufacturing process>
In the third step, the linear PE is heat-compressed to the net material back plane 2B side of the net material thickness direction BT in a part of the net material front plane 2A of the net material thickness direction BT of the three-dimensional three-dimensional net-like material 2. Heat compression / compression) to form a net material seating recess 21 having a net material seating plane 22 that follows the bulging back plane 17 in the three-dimensional three-dimensional net-like material 2.

三次元立体網状材２は、図２０乃至図２４で説明したと同様の構成（構造）であって、例えば、直方体又は立方体に形成される。三次元立体網状材２は、網材厚さ方向ＢＴにおいて、原型シート５５の着座側クッション部５のクッション裏平面５Ｂに沿った形状の網材表平面２Ａ及び網材裏平面２Ｂを有する（図２０乃至図２４参照）。
三次元立体網状材２は、網材前後方向ＢＦに各網材端面２Ｃ，２Ｄ（網材前側端面２Ｃ、網材後側端面２Ｄ）を有し、網材幅方向ＢＨに網材端面２Ｅ，２Ｆ（網材左側端面２Ｅ，網材右側端面２Ｆ）を有する。 The three-dimensional three-dimensional net-like member 2 has the same structure (structure) as described with reference to FIGS. 20 to 24, and is formed in, for example, a rectangular parallelepiped or a cube. The three-dimensional three-dimensional net-like material 2 has a net material front plane 2A and a net material back plane 2B having a shape along the cushion back plane 5B of the seating side cushion portion 5 of the prototype seat 55 in the net material thickness direction BT (FIG. 20 to FIG. 24).
The three-dimensional three-dimensional net-like material 2 has each net material end face 2C, 2D (net material front end face 2C, net material rear end face 2D) in the net material front-rear direction BF, and the net material end face 2E, in the net material width direction BH. It has 2F (net material left end surface 2E, net material right end surface 2F).

三次元立体網状材２は、図２０乃至図２４で説明したと同様に、網材着座凹み部２１を備える。網材着座凹み部２１は、網材厚さ方向ＢＴと直交する網材幅方向ＢＨの網材幅中心線Ｂｆを境として対称（左右対称）に形成される。網材着座凹み部２１は、網材表平面２Ａの一部において、三次元立体網状材２の線条ＰＥを網材厚さ方向ＢＴの網材裏平面２Ｂ側に圧縮（熱圧縮／加熱圧縮）して形成される。網材着座凹み部２１は、着座凹み部１５のクッション裏平面５Ｂ及び膨出裏平面１７に倣った形状に形成される。 The three-dimensional three-dimensional net-like material 2 includes a net material seating recess 21 as described with reference to FIGS. 20 to 24. The net material seating recess 21 is formed symmetrically (symmetrically) with the net material width center line Bf in the net material width direction BH orthogonal to the net material thickness direction BT as a boundary. The net material seating recess 21 compresses the linear PE of the three-dimensional three-dimensional net-like material 2 toward the net material back plane 2B side in the net material thickness direction BT (heat compression / heat compression) in a part of the net material front plane 2A. ) Is formed. The net material seating recess 21 is formed in a shape that follows the cushion back plane 5B and the bulging back plane 17 of the seating recess 15.

網材着座平面２２は、図２０乃至図２４で説明したと同様に、原型シート５５の着座側クッション部５の膨出裏平面１７に倣った傾斜面に形成される。網材着座平面２２は、網材表平面２Ａの一部において、三次元立体網状材２の線条ＰＥを網材厚さ方向ＢＴの網材裏平面２Ｂ側に圧縮（熱圧縮／加熱圧縮）して形成される。網材着座平面２２は、例えば、三次元立体網状材２の線条ＰＥを加熱しつつ網材裏平面２Ｂ側に圧縮（熱圧縮／加熱圧縮）して形成される。
網材着座平面２２は、網材厚さ方向ＢＴにおいて、三次元立体網状材２の線条ＰＥ（網材表平面２Ａの一部）を網材裏平面２Ｂ側に圧縮して凹ませて、網材表平面２Ａに対して傾斜角度：θ１を隔てて傾斜して、膨出裏平面１７に倣った傾斜面に形成される。
三次元立体網状材２において、線条ＰＥの圧縮量（凹み量）は、網材前後方向ＢＦにおいて、前側表網材位置Ｐ３から一方の網材端面２Ｄ側（網材後側端面２Ｄ側）に向けて、段々（徐々）に多くして、網材着座平面２２を形成する。 The net material seating plane 22 is formed on an inclined surface that follows the bulging back plane 17 of the seating side cushion portion 5 of the prototype seat 55, as described with reference to FIGS. 20 to 24. The net material seating plane 22 compresses the linear PE of the three-dimensional three-dimensional net-like material 2 toward the net material back plane 2B side of the net material thickness direction BT in a part of the net material front plane 2A (heat compression / heat compression). Is formed. The net material seating plane 22 is formed, for example, by heating the linear PE of the three-dimensional three-dimensional net-like material 2 and compressing (heat compression / heat compression) toward the net material back plane 2B side.
The net material seating plane 22 is formed by compressing and denting the linear PE (a part of the net material front plane 2A) of the three-dimensional three-dimensional net-like material 2 toward the net material back plane 2B side in the net material thickness direction BT. It is formed on an inclined surface that follows the bulging back plane 17 by inclining with respect to the net material front plane 2A with an inclination angle: θ1.
In the three-dimensional three-dimensional net material 2, the compression amount (dent amount) of the linear PE is the one net material end surface 2D side (the net material rear end surface 2D side) from the front side surface net material position P3 in the net material front-rear direction BF. The net material seating plane 22 is formed by gradually increasing the number toward the surface.

＜第４工程／クッション原型シート製造工程＞
第４工程は、図４０乃至図４２に示すように、繊維構造シート５１の型押しした原型シート５５を繊維構造シート５１から切離して、クッション原型シート６０を形成する。
クッション原型シート６０は、繊維構造シート５１に型押しした原型シート５５において、各クッション部６〜９のクッション端６Ｃ〜９Ｃを含む外縁に沿って切断（裁断）して、繊維構造シート５１から切離される。 <Fourth process / Cushion prototype sheet manufacturing process>
In the fourth step, as shown in FIGS. 40 to 42, the embossed prototype sheet 55 of the fiber structure sheet 51 is separated from the fiber structure sheet 51 to form the cushion prototype sheet 60.
The cushion prototype sheet 60 is cut (cut) from the fiber structure sheet 51 by cutting (cutting) along the outer edge including the cushion ends 6C to 9C of each cushion portion 6 to 9 in the prototype sheet 55 embossed on the fiber structure sheet 51. Be separated.

＜第５工程／三次元立体網状材積層工程＞
第５工程は、図４３乃至図４５に示すように、三次元立体網状材２をクッション原型シート６０の着座側クッション部５に積層（積載）する。
第５工程において、三次元立体網状材２は、網材表平面２Ａ（網材着座平面２２）をクッション原型シート６０の着座側クッション部のクッション裏平面５Ｂ（膨出裏平面１７）に向けて配置される。
三次元立体網状材２は、網材着座平面２２を除く網材表平面２Ａを、クッション原型シート６０の着座側クッション部５の膨出裏平面１７を除くクッション裏平面５Ｂに当接して、クッション原型シート６０の着座側クッション部５に積層（積載）される。
三次元立体網状材２は、網材着座平面２２の全面を、クッション原型シート６０の着座側クッション部５の膨出裏平面１７の全面に当接して、クッション原型シート６０の着座側クッション部５に積層（積載）される。
これにより、三次元立体網状材２は、クッション原型シート６０の着座側クッション部５に隙間なく密接（密着）して、着座側クッション部５に積層（積載）される。 <Fifth process / Three-dimensional three-dimensional net material laminating process>
In the fifth step, as shown in FIGS. 43 to 45, the three-dimensional three-dimensional net-like material 2 is laminated (loaded) on the seating side cushion portion 5 of the cushion prototype seat 60.
In the fifth step, the three-dimensional three-dimensional net-like material 2 directs the net material front plane 2A (the net material seating plane 22) toward the cushion back plane 5B (bulging back plane 17) of the seating side cushion portion of the cushion prototype seat 60. Be placed.
The three-dimensional three-dimensional net-like material 2 abuts the net material front plane 2A excluding the net material seating plane 22 against the cushion back plane 5B excluding the bulging back plane 17 of the seating side cushion portion 5 of the cushion prototype seat 60 to cushion the cushion. It is laminated (loaded) on the seating side cushion portion 5 of the prototype seat 60.
The three-dimensional three-dimensional net-like material 2 abuts the entire surface of the mesh material seating plane 22 on the entire surface of the bulging back flat surface 17 of the seating side cushion portion 5 of the cushion prototype seat 60, and the seating side cushion portion 5 of the cushion prototype seat 60. It is laminated (loaded) on.
As a result, the three-dimensional three-dimensional net-like material 2 is closely (adhered) to the seating side cushion portion 5 of the cushion prototype seat 60 without any gap, and is laminated (loaded) on the seating side cushion portion 5.

三次元立体網状材２は、各網材端面２Ｃ〜２Ｆを、クッション原型シート６０の着座側クッション部５の各クッション端５Ｃ〜５Ｆに沿って配置して、着座側クッション部５に積層（積載）される。
三次元立体網状材２は、網材前後方向ＢＦの網材端面２Ｃ（網材前側端面２Ｃ）を着座側クッション部５のクッション前後方向ＣＦのクッション端５Ｃ（クッション前端５Ｃ／クッション前辺５Ｃ）に沿って配置し、及び網材前後方向ＢＦの網材端面２Ｄ（網材後側端面２Ｄ）を着座側クッション部５のクッション前後方向ＣＦのクッション端５Ｄ（クッション後端５Ｄ／クッション後辺５Ｄ）に沿って配置して、クッション原型シート６０の着座側クッション部５に積層（積載）される。
三次元立体網状材２は、網材幅方向ＢＨの網材端面２Ｅ（網材左側端面２Ｅ）を着座側クッション部５のクッション幅方向ＣＨのクッション端５Ｅ（クッション左端５Ｅ／クッション左辺５Ｅ）に沿って配置し、及び網材幅方向ＢＨの網材端面２Ｆ（網材右側端面２Ｆ）を着座側クッション部５のクッション幅方向ＣＨのクッション端５Ｆ（クッション右端５Ｆ／クッション右辺５Ｆ）に沿って配置して、クッション原型シート６０の着座側クッション部５に積層（積載）される。 In the three-dimensional three-dimensional net-like material 2, the end faces 2C to 2F of each net material are arranged along the cushion ends 5C to 5F of the seating side cushion portion 5 of the cushion prototype seat 60, and are laminated (loaded) on the seating side cushion portion 5. ).
In the three-dimensional three-dimensional net-like material 2, the net material end surface 2C (net material front end surface 2C) of the net material front-rear direction BF is used as the cushion end 5C of the cushion front-rear direction CF of the seating side cushion portion 5 (cushion front end 5C / cushion front side 5C). The net material end surface 2D (net material rear end surface 2D) of the net material front-rear direction BF is arranged along the cushion end 5D of the cushion front-rear direction CF of the seating side cushion portion 5 (cushion rear end 5D / cushion rear side 5D). ), And laminated (loaded) on the seating side cushion portion 5 of the cushion prototype seat 60.
In the three-dimensional three-dimensional net-like material 2, the net material end surface 2E (net material left end surface 2E) in the net material width direction BH is used as the cushion end 5E (cushion left end 5E / cushion left side 5E) of the cushion width direction CH of the seating side cushion portion 5. Arrange along the net material end surface 2F (net material right end surface 2F) in the net material width direction BH along the cushion end 5F (cushion right end 5F / cushion right side 5F) of the cushion width direction CH of the seating side cushion portion 5. It is arranged and laminated (loaded) on the seating side cushion portion 5 of the cushion prototype seat 60.

＜第６工程／クッション原型シート組立工程＞
第６工程は、図４６及び図４７に示すように、三次元立体網状材２を積層したクッション原型シート６０を組立てる。 <Sixth process / Cushion prototype sheet assembly process>
In the sixth step, as shown in FIGS. 46 and 47, the cushion prototype sheet 60 in which the three-dimensional three-dimensional netted lumber 2 is laminated is assembled.

三次元立体網状材２を積層したクッション原型シート６０において、前側クッション部６は、着座側クッション部５のクッション端５Ｃ（クッション前端５Ｃ／クッション前辺５Ｃ）に沿って着座側クッション部５のクッション裏平面５Ｂ側に折曲げられ、及び三次元立体網状材２の網材端面２Ｃ（網材前側端面２Ｃ）に当接される。前側クッション部６は、着座側クッション部５のクッション裏平面５Ｂと直交して折曲げられて、着座側クッション部５に立設される。
前側クッション部６は、クッション内側平面６Ｂを三次元立体網状材２の網材端面２Ｃ（網材前側端面２Ｃ）に当接して、着座側クッション部５に立設される。 In the cushion prototype sheet 60 in which the three-dimensional three-dimensional net-like material 2 is laminated, the front side cushion portion 6 is a cushion of the seating side cushion portion 5 along the cushion end 5C (cushion front end 5C / cushion front side 5C) of the seating side cushion portion 5. It is bent to the back plane 5B side and is brought into contact with the net material end surface 2C (net material front end surface 2C) of the three-dimensional three-dimensional net-like material 2. The front side cushion portion 6 is bent perpendicular to the cushion back plane 5B of the seating side cushion portion 5 and is erected on the seating side cushion portion 5.
The front side cushion portion 6 is erected on the seating side cushion portion 5 by abutting the cushion inner flat surface 6B against the net material end surface 2C (net material front end surface 2C) of the three-dimensional three-dimensional net-like material 2.

三次元立体網状材２を積層したクッション原型シート６０において、後側クッション部７は、着座側クッション部５のクッション端５Ｄ（クッション後端５Ｄ／クッション後辺５Ｄ）に沿って着座側クッション部５のクッション裏平面５Ｂ側に折曲げられ、及び三次元立体網状材２の網材端面２Ｄ（網材後側端面２Ｄ）に当接される。後側クッション部７は、着座側クッション部５のクッション裏平面５Ｂと直交して折曲げられて、着座側クッション部５に立設される。
後側クッション部７は、クッション内側平面７Ｂを三次元立体網状材２の網材端面２Ｄ（網材後側端面２Ｄ）に当接して、着座側クッション部５に立設される。 In the cushion prototype sheet 60 in which the three-dimensional three-dimensional net-like material 2 is laminated, the rear cushion portion 7 is the seating side cushion portion 5 along the cushion end 5D (cushion rear end 5D / cushion rear side 5D) of the seating side cushion portion 5. It is bent toward the back flat surface 5B side of the cushion, and is brought into contact with the net material end surface 2D (net material rear end surface 2D) of the three-dimensional three-dimensional net-like material 2. The rear cushion portion 7 is bent perpendicular to the cushion back plane 5B of the seating side cushion portion 5 and is erected on the seating side cushion portion 5.
The rear side cushion portion 7 is erected on the seating side cushion portion 5 by abutting the cushion inner flat surface 7B against the net material end surface 2D (net material rear end surface 2D) of the three-dimensional three-dimensional net-like material 2.

三次元立体網状材２を積層したクッション原型シート６０において、左側クッション部８は、着座側クッション部５のクッション端５Ｅ（クッション左端５Ｅ／クッション左辺５Ｅ）に沿って着座側クッション部５のクッション裏平面５Ｂ側に折曲げられ、及び三次元立体網状材２の網材端面２Ｅ（網材左側端面２Ｅ）に当接される。左側クッション部８は、着座側クッション部５のクッション裏平面５Ｂと直交して折曲げられて、着座側クッション部５に立設される。
左側クッション部８は、クッション内側平面８Ｂを三次元立体網状材２の網材端面２Ｅ（網材左側端面２Ｅ）に当接して、着座側クッション部５に立設される。 In the cushion prototype sheet 60 in which the three-dimensional three-dimensional net-like material 2 is laminated, the left side cushion portion 8 is the back of the cushion of the seating side cushion portion 5 along the cushion end 5E (cushion left end 5E / cushion left side 5E) of the seating side cushion portion 5. It is bent toward the flat surface 5B and is brought into contact with the net material end surface 2E (net material left end surface 2E) of the three-dimensional three-dimensional net-like material 2. The left side cushion portion 8 is bent perpendicular to the cushion back plane 5B of the seating side cushion portion 5 and is erected on the seating side cushion portion 5.
The left side cushion portion 8 is erected on the seating side cushion portion 5 by abutting the cushion inner flat surface 8B against the net material end surface 2E (net material left end surface 2E) of the three-dimensional three-dimensional net-like material 2.

三次元立体網状材２を積層したクッション原型シート６０において、右側クッション部９は、着座側クッション部５のクッション端５Ｆ（クッション右端５Ｆ／クッション右辺５Ｆ）に沿って着座側クッション部５のクッション裏平面５Ｂ側に折曲げられ、及び三次元立体網状材２の網材端面２Ｆ（網材右側端面２Ｆ）に当接される。右側クッション部９は、着座側クッション部５のクッション裏平面５Ｂと直交して折曲げられて、着座側クッション部５に立設される。
右側クッション部９は、クッション内側平面９Ｂを三次元立体網状材２の網材端面２Ｆ（網材右側端面２Ｆ）に当接して、着座側クッション部５に立設される。 In the cushion prototype sheet 60 in which the three-dimensional three-dimensional net-like material 2 is laminated, the right side cushion portion 9 is the back of the cushion of the seating side cushion portion 5 along the cushion end 5F (cushion right end 5F / cushion right side 5F) of the seating side cushion portion 5. It is bent toward the flat surface 5B and is brought into contact with the net material end surface 2F (net material right end surface 2F) of the three-dimensional three-dimensional net-like material 2. The right side cushion portion 9 is bent perpendicular to the cushion back plane 5B of the seating side cushion portion 5 and is erected on the seating side cushion portion 5.
The right side cushion portion 9 is erected on the seating side cushion portion 5 by abutting the cushion inner flat surface 9B against the net material end surface 2F (net material right end surface 2F) of the three-dimensional three-dimensional net-like material 2.

第６工程において、クッション原型シート６０の左側クッション部８、及び右側クッション部９は、前側クッション部６及び後側クッション部７の間に配置されて、着座側クッション部５のクッション裏平面５Ｂ側に折曲げられ、及び着座側クッション部５に立設される。
クッション原型シート６０において、各クッション部６〜９は、シート厚さ方向ＳＴ（クッション厚さ方向ＣＴ）において、着座側クッション部５の各クッション端５Ｃ〜５Ｆから突出して配置される。
これにより、クッション原型シート６０において、各クッション部６〜９は、各クッション端６Ｃ〜９Ｃに開口する網材収納凹所１０を形成して、着座側クッション部５に立設される。三次元立体網状材２は、網材収納凹所１０に収納される。 In the sixth step, the left side cushion portion 8 and the right side cushion portion 9 of the cushion prototype seat 60 are arranged between the front side cushion portion 6 and the rear side cushion portion 7, and are arranged on the cushion back plane 5B side of the seating side cushion portion 5. And is erected on the seating side cushion portion 5.
In the cushion prototype seat 60, the cushion portions 6 to 9 are arranged so as to project from the cushion ends 5C to 5F of the seating side cushion portion 5 in the seat thickness direction ST (cushion thickness direction CT).
As a result, in the cushion prototype seat 60, each of the cushion portions 6 to 9 forms a net material storage recess 10 that opens at each of the cushion ends 6C to 9C, and is erected on the seating side cushion portion 5. The three-dimensional three-dimensional net-like material 2 is stored in the net material storage recess 10.

＜第７工程／接着固定工程＞
第７工程は、図４６及び図４７に示すように、クッション原型シート６０において、着座側クッション部５のクッション裏平面５Ｂ側に折曲げた各クッション部６〜９を接着して固定する。
第７工程では、着座側クッション部５のクッション裏平面５Ｂ側に折曲げた前側クッション部６と、クッション裏平面５Ｂ側に折曲げた左側クッション部８を接着剤等にて接着して固定する。
第７工程では、着座側クッション部５のクッション裏平面５Ｂ側に折曲げた後側クッション部７と、クッション裏平面５Ｂ側に折曲げた左側クッション部８を接着剤等で接着して固定する。 <7th process / adhesive fixing process>
In the seventh step, as shown in FIGS. 46 and 47, the cushion portions 6 to 9 bent toward the cushion back plane 5B side of the seating side cushion portion 5 are adhered and fixed in the cushion prototype seat 60.
In the seventh step, the front side cushion portion 6 bent toward the cushion back plane 5B side of the seating side cushion portion 5 and the left side cushion portion 8 bent toward the cushion back plane 5B side are adhered and fixed with an adhesive or the like. ..
In the seventh step, the rear side cushion portion 7 bent toward the cushion back plane 5B side of the seating side cushion portion 5 and the left side cushion portion 8 bent toward the cushion back plane 5B side are adhered and fixed with an adhesive or the like. ..

第７工程では、着座側クッション部５のクッション裏平面５Ｂ側に折曲げた前側クッション部６と、クッション裏平面５Ｂ側に折曲げた右側クッション部９を接着剤等で接着して固定する。
第７工程では、着座側クッション部５のクッション裏平面５Ｂ側に折曲げた後側クッション部７と、クッション裏平面５Ｂ側に折曲げた右側クッション部９を接着剤等で接着して固定する。
これにより、クッション原型シート６０において、左側クッション部８は、前側クッション部６及び後側クッション部７に固定され、右側クッション部９は、前側クッション部６及び後側クッション部７に固定され、各クッション部５〜９はクッション材１を形成（構成）する。 In the seventh step, the front side cushion portion 6 bent toward the cushion back plane 5B side of the seating side cushion portion 5 and the right side cushion portion 9 bent toward the cushion back plane 5B side are adhered and fixed with an adhesive or the like.
In the seventh step, the rear side cushion portion 7 bent toward the cushion back plane 5B side of the seating side cushion portion 5 and the right side cushion portion 9 bent toward the cushion back plane 5B side are adhered and fixed with an adhesive or the like. ..
As a result, in the cushion prototype seat 60, the left side cushion portion 8 is fixed to the front side cushion portion 6 and the rear side cushion portion 7, and the right side cushion portion 9 is fixed to the front side cushion portion 6 and the rear side cushion portion 7, respectively. The cushion portions 5 to 9 form (configure) the cushion material 1.

＜第８工程／バネ受け材固定接着工程＞
第８工程は、図１乃至図９、図１１及び図１２で説明したと同様に、バネ受け材３にてクッション原型シート６０から組立てたクッション材１（以下、「クッション材１」という）の網材収納凹所１０を閉塞して、バネ受け材３をクッション材１に固定する。
バネ受け材３は、図１乃至図９、図１１、図１２、及び図２５乃至図３２で説明したと同様な構成（構造）であって、バネ受け平板３１、前側固定板３２、後側固定板３３、左側固定板３４及び右側固定板３５を備える。 <8th process / Spring receiving material fixing and bonding process>
In the eighth step, as described with reference to FIGS. 1 to 9, 11 and 12, the cushion material 1 (hereinafter referred to as “cushion material 1”) assembled from the cushion prototype sheet 60 with the spring receiving material 3 is used. The net material storage recess 10 is closed, and the spring receiving material 3 is fixed to the cushion material 1.
The spring receiving material 3 has the same configuration (structure) as described with reference to FIGS. 1 to 9, 11, 12, and 25 to 32, and has a spring receiving flat plate 31, a front fixing plate 32, and a rear side. A fixing plate 33, a left side fixing plate 34, and a right side fixing plate 35 are provided.

第８工程において、バネ受け材３は、図１乃至図９、図１１及び図１２で説明したと同様に、バネ受け平板３１（バネ受け表平面３１Ａ）の全面を、網材収納凹所１０に収納した三次元立体網状材２の網材裏平面２Ｂの全面に当接して配置される。
第８工程において、バネ受け材３は、図１乃至図９、図１１及び図１２で説明したと同様に、前側固定板３２（固定板表平面３２Ａ）を前側クッション部６（クッション内側平面６Ｂ）に接着剤で接着し、及び後側固定板３３（固定板表面３３Ａ）を後側クッション部７（クッション外側面７Ａ及びクッション端７Ｃ）に接着剤で接着して、クッション材１に固定される（図１乃至図９参照）。
第８工程において、バネ受け材３は、左側固定板３４（固定板表平面３４Ａ）を左側クッション部８（クッション内側平面８Ｂ）に接着剤で接着し、及び右側固定板３５（固定板表平面３５Ａ）を右側クッション部９（クッション内側平面９Ｂ）に接着剤で接着して、クッション材１に固定される（図１乃至図９参照）。バネ受け材３は、図１乃至図９で説明したと同様に、各固定板片３６〜３８を、後側クッション部７を除く各クッション部６，８，９のクッション端６Ｃ，８Ｃ，９Ｃの夫々に接着剤で接着して、クッション材１に固定される。
これにより、バネ受け材３は、図８及び図９に示すように、バネ受け平板３１にて網材収納凹所１０を閉塞（閉鎖）して、三次元立体網状材２をクッション材１の内側に配置される。バネ受け材３は、バネ受け表平面３Ａを三次元立体網状材２の網材裏平面２Ｂに当接して、バネ受け平板３１にて三次元立体網状材２を支持する。 In the eighth step, in the spring receiving material 3, the entire surface of the spring receiving flat plate 31 (spring receiving surface plane 31A) is covered with the net material storage recess 10 in the same manner as described with reference to FIGS. 1 to 9, 11 and 12. The three-dimensional three-dimensional net-like material 2 housed in the above is arranged in contact with the entire surface of the net material back plane 2B.
In the eighth step, the spring receiving member 3 has the front fixing plate 32 (fixing plate surface plane 32A) and the front cushion portion 6 (cushion inner plane 6B) as described with reference to FIGS. 1 to 9, 11 and 12. ) With an adhesive, and the rear fixing plate 33 (fixing plate surface 33A) is adhered to the rear cushion portion 7 (cushion outer surface 7A and cushion end 7C) with an adhesive and fixed to the cushion material 1. (See FIGS. 1 to 9).
In the eighth step, the spring receiving material 3 adheres the left side fixing plate 34 (fixing plate surface plane 34A) to the left side cushion portion 8 (cushion inner surface surface 8B) with an adhesive, and the right side fixing plate 35 (fixing plate surface plane). 35A) is adhered to the right side cushion portion 9 (cushion inner flat surface 9B) with an adhesive and fixed to the cushion material 1 (see FIGS. 1 to 9). In the spring receiving material 3, as described with reference to FIGS. 1 to 9, the fixing plate pieces 36 to 38 are attached to the cushion ends 6C, 8C, 9C of the cushion portions 6, 8 and 9 excluding the rear cushion portion 7. It is fixed to the cushion material 1 by adhering it to each of the above with an adhesive.
As a result, as shown in FIGS. 8 and 9, the spring receiving material 3 closes (closes) the net material storage recess 10 with the spring receiving flat plate 31, and the three-dimensional three-dimensional net-like material 2 is used as the cushion material 1. Placed inside. In the spring receiving material 3, the spring receiving front plane 3A is in contact with the net material back plane 2B of the three-dimensional three-dimensional net-like material 2, and the spring receiving flat plate 31 supports the three-dimensional three-dimensional net-like material 2.

このように、座席用クッションの製造方法では、第１工程乃至第８工程によって、図１乃至図３３で説明したと同様の構成（構造）であって、クッション材１、三次元立体網状材２及びバネ受け材３を備える座席用クッションＸ（座席用クッションパッド）を形成（製造）する。 As described above, in the method for manufacturing the seat cushion, the cushion material 1 and the three-dimensional three-dimensional net-like material 2 have the same configuration (structure) as described with reference to FIGS. 1 to 33 according to the first to eighth steps. And a seat cushion X (seat cushion pad) including the spring receiving material 3 is formed (manufactured).

本発明は、主として、鉄道車両、自動車、航空機等の車両用座席に最適である。 The present invention is mainly suitable for vehicle seats of railway vehicles, automobiles, aircraft and the like.

Ｘ 座席用クッション
１ クッション材
２ 三次元立体網状材
２Ａ 網材表平面（網材表面）
２Ｂ 網材裏平面（網材裏面）
３ バネ受け材
４ 繊維構造体（繊維構造シート）
５Ａ クッション表平面（クッション表面）
５Ｂ クッション裏平面（クッション裏面）
１５ 着座凹み部
１６ 着座平面（着座面）
１７ 膨出裏平面（膨出裏面）
２１ 網材着座凹み部
２２ 網材着座平面（網材着座面）
ＣＴ クッション厚さ方向（クッション上下方向）
ＣＦ クッション前後方向
ＣＨ クッション幅方向
ＢＴ 網材厚さ方向
ＢＦ 網材前後方向
ＢＨ 網材幅方向 X Seat cushion 1 Cushion material 2 Three-dimensional three-dimensional net material 2A Net material surface plane (net material surface)
2B Net material back plane (back surface of net material)
3 Spring receiving material 4 Fiber structure (fiber structure sheet)
5A Cushion surface plane (cushion surface)
5B Cushion back plane (cushion back)
15 Seating recess 16 Seating plane (seat surface)
17 Swelling back plane (swelling back)
21 Net material seating recess 22 Net material seating plane (net material seating surface)
CT cushion thickness direction (cushion vertical direction)
CF Cushion front-back direction CH Cushion width direction BT Lumber thickness direction BF Lumber front-back direction BH Lumber width direction

Claims (3)

主体繊維及びバインダ繊維が混合された繊維構造体を複数積層して形成されたクッション材と、熱接着性合成樹脂の線条を屈曲してランダムループを形成し、前記線条の接触部を接合してなる三次元立体網状材と、を備え、前記三次元立体網状材は、網材厚さ方向の網材表平面を前記クッション材のクッション厚さ方向のクッション裏平面に当接して、前記クッション材の内側に配置される座席用クッションであって、
前記クッション材は、
前記クッション厚さ方向のクッション表面の一部が前記クッション厚さ方向に凹んだ着座平面を有し、前記着座平面に対向する前記クッション裏平面の一部の膨出裏平面を前記クッション裏平面から膨出して形成され、着座者の臀部が前記着座平面から着座される着座凹み部を備え、
前記着座凹み部は、
前記クッション表面及び前記クッション裏平面の一部において、前記着座平面及び前記膨出裏平面の間に略均一なクッション厚さを有して形成され、
前記着座平面は、
前記クッション表面からクッション裏平面側に傾斜しつつ、前記クッション厚さ方向と直交するクッション前後方向の一方のクッション端側に延在され、
前記膨出裏平面は、
前記クッション裏平面から前記三次元立体網状材の網材表平面側に傾斜しつつ、一方の前記クッション端側に延在され、
前記三次元立体網材は、
前記網材表平面の一部が前記網材厚さ方向に凹んで形成され、及び前記膨出裏平面に倣った傾斜平面に形成された網材着座平面を有する網材着座凹み部を備え、
前記網材着座平面を除く前記網材表平面を前記膨出裏平面を除く前記クッション裏平面に当接し、前記網材着座平面の全面を前記膨出裏平面の全面に当接して、前記クッション材の内側に配置され、
前記網材着座平面は、
前記網材表平面の一部において、前記三次元立体網状材の前記線条を前記網材厚さ方向の前記網材裏面側に圧縮して形成され、
前記網材厚さ方向と直交する網材前後方向において、前記網材表平面の表網材位置から前記網材裏面側に傾斜しつつ、前記網材前後方向の一方の網材端面側に延在され、
前記網材前後方向において、前記表網材位置から一方の網材端面側に向けて、段々に前記線条の密度を疎から密にして形成される
ことを特徴とする座席用クッション。 A cushioning material formed by laminating a plurality of fiber structures in which a main fiber and a binder fiber are mixed and a line of heat-adhesive synthetic resin are bent to form a random loop, and the contact portion of the line is joined. The three-dimensional three-dimensional net-like material is provided by abutting the front plane of the net material in the thickness direction of the net material with the back plane of the cushion in the cushion thickness direction of the cushion material. A seat cushion placed inside the cushioning material.
The cushion material is
Has a partially seated plane recessed into the cushion thickness direction of the cushion thickness direction of the cushion surface, a portion of the bulging back plane of the cushion back plane facing the seating plane of the cushion back plane It is formed by bulging and has a seating recess in which the seated person's buttocks are seated from the seating plane.
The seating recess is
It is formed on the cushion surface and a part of the cushion back plane with a substantially uniform cushion thickness between the seating plane and the bulging back plane.
The seating plane is
While inclining from the cushion surface to the cushion back plane side, it extends to one cushion end side in the cushion front-rear direction orthogonal to the cushion thickness direction.
The bulging back plane is
While inclining from the back plane of the cushion toward the front plane of the net material of the three-dimensional three-dimensional net-like material, it extends to one end side of the cushion.
The three-dimensional three-dimensional net material is
Some of the network material table plane is formed recessed in said network member thickness direction, and comprises a mesh material seating recess having a mesh member seating plane formed on the inclined plane that follows the Rise Deura plane,
The net material front plane excluding the net material seating plane is in contact with the cushion back plane excluding the bulging back plane, and the entire surface of the net material seating plane is in contact with the entire surface of the bulging back plane to be in contact with the cushion. Placed inside the material,
The net material seating plane is
A part of the surface plane of the net material is formed by compressing the streaks of the three-dimensional three-dimensional net material toward the back surface side of the net material in the thickness direction of the net material.
In the front-rear direction of the net material orthogonal to the thickness direction of the net material, the net material extends from the front net material position on the front plane of the net material toward the back surface side of the net material and extends to one end face side of the net material in the front-rear direction of the net material. Being present
For seats, in the front-rear direction of the net material, the streaks are gradually formed from the position of the surface net material toward the end face side of one of the net materials so that the density of the streaks is gradually reduced from sparse to dense. cushion. 前記クッション材は、
前記着座平面及び前記膨出裏平面の間において、前記繊維構造体を前記クッション厚さ方向に複数積層して形成され、
又は
前記着座平面及び前記膨出裏平面の間において、前記繊維構造体を前記クッション前後方向に複数積載して形成される
ことを特徴とする請求項１に記載の座席用クッション。 The cushion material is
A plurality of the fiber structures are laminated in the cushion thickness direction between the seating plane and the bulging back plane.
The seat cushion according to claim 1, wherein a plurality of the fiber structures are stacked in the front-rear direction of the cushion between the seating plane and the bulging back plane. 主体繊維及びバインダ繊維が混合された繊維構造体を複数積層して繊維構造シートを形成する第１工程と、
前記繊維構造シートのシート厚さ方向のシート表平面及びシート裏平面から型押しして、前記繊維構造シートに原型シートを成形する工程であって、
矩形状の着座側クッション部、前記着座側クッション部のクッション前後方向の各クッション端に沿って前記着座側クッション部に連続する前側及び後側クッション部、前記着座側クッション部の前記クッション前後方向と直交するクッション幅方向の各クッション端に沿って前記着座側クッション部に連続する左側及び右側クッション部を、前記繊維構造シートに型押しし、
前記着座側クッション部のクッション厚さ方向のクッション表平面の一部の着座平面を前記クッション厚さ方向に凹ませ、前記着座平面に対向するクッション裏平面の一部の膨出裏平面を前記着座側クッション部の前記クッション裏平面から膨出する着座凹み部を、前記繊維構造シートに型押しし、
前記着座平面及び前記膨出裏平面の間に略均一なクッション厚さを有して前記着座凹み部を、前記繊維構造シートに型押しし、
前記着座側クッション部の前記クッション表平面から前記クッション裏平面側に傾斜しつつ、前記着座側クッション部の前記クッション前後方向の一方のクッション端側に延在する前記着座平面を、前記繊維構造シートに型押しし、
前記着座側クッション部の前記クッション裏平面から傾斜しつつ、前記クッション前後方向の一方のクッション端側に延在する前記膨出裏平面を、前記繊維構造シートに型押しして、前記原型シートを前記繊維構造シートに形成する第２工程と、
熱接着性合成樹脂の線条を屈曲してランダムループを形成し、前記線条の接触部を接合してなる三次元立体網状材であって、前記三次元立体網状材の網材厚さ方向の網材表平面の一部において、前記線条を前記網材厚さ方向の網材裏平面側に熱圧縮して前記膨出裏平面に倣った網材着座平面を有する網材着座凹み部を、前記三次元立体網状材に形成する第３工程と、
前記繊維構造シートから前記原型シートを切離して、クッション原型シートを形成する第４工程と、
前記三次元立体網状材の前記網材着座平面を除く前記網材表平面を、前記着座側クッション部の前記膨出裏平面を除く前記クッション裏平面に当接し、前記網材着座平面の全面を前記膨出裏平面の全面に当接すると共に、前記三次元立体網状材の前記網材厚さ方向と直交する網材前後方向及び網材幅方向の各網材端面を前記着座側クッション部の各クッション端に沿わせて、前記三次元立体網状材を前記クッション原型シートの前記着座側クッション部に積層する第５工程と、
前記三次元立体網状材を積層した前記クッション原型シートにおいて、前記前側クッション部、前記後側クッション部、前記左側クッション部及び前記右側クッション部を、前記クッション原型シートの前記着座側クッション部の前記クッション裏平面側に折曲げて、前記三次元立体網状材の前記各網材端面に当接する第６工程と、
前記クッション裏平面側に折曲げた前記前側クッション部と、前記クッション裏平面側に折曲げた前記左側及び右側クッション部を接着固定する第７工程と、
を含んでなることを特徴とする座席用クッションの製造方法。 The first step of laminating a plurality of fiber structures in which a main fiber and a binder fiber are mixed to form a fiber structure sheet, and
It is a step of molding a prototype sheet into the fiber structure sheet by embossing from the sheet front plane and the sheet back plane in the sheet thickness direction of the fiber structure sheet.
The rectangular seating side cushion portion, the front and rear cushion portions continuous with the seating side cushion portion along each cushion end in the cushion front-rear direction of the seating side cushion portion, and the cushion front-rear direction of the seating side cushion portion. The left and right cushion portions continuous with the seating side cushion portion along the respective cushion ends in the orthogonal cushion width directions are embossed on the fiber structure sheet.
A part of the seating plane of the cushion front plane in the cushion thickness direction of the seating side cushion portion is recessed in the cushion thickness direction, and a part of the bulging back plane of the cushion back plane facing the seating plane is seated. The seating recess that bulges from the back surface of the cushion of the side cushion portion is embossed on the fiber structure sheet.
The seating recess has a substantially uniform cushion thickness between the seating plane and the bulging back plane, and the seating recess is embossed on the fiber structure sheet.
The fiber structure sheet is formed on the seating plane extending from the cushion front plane of the seating side cushion portion toward the cushion back plane side and extending to one cushion end side of the seating side cushion portion in the front-rear direction of the cushion. Embossed on
While inclining from the cushion back plane of the seating side cushion portion, the bulging back plane extending to one cushion end side in the front-rear direction of the cushion is embossed on the fiber structure sheet to press the prototype sheet. The second step of forming the fiber structure sheet and
A three-dimensional three-dimensional net-like material formed by bending a wire of a heat-adhesive synthetic resin to form a random loop and joining the contact portions of the line, in the thickness direction of the three-dimensional three-dimensional net-like material. In a part of the front plane of the net material, the streaks are heat-compressed to the back plane side of the net material in the thickness direction of the net material, and the net material seating recess portion having the seating plane of the net material following the bulging back plane. In the third step of forming the three-dimensional three-dimensional net-like material,
A fourth step of separating the prototype sheet from the fiber structure sheet to form a cushion prototype sheet, and
The front plane of the net material excluding the seating plane of the net material of the three-dimensional three-dimensional net-like material is brought into contact with the back plane of the cushion excluding the bulging back plane of the cushion portion on the seating side, and the entire surface of the seating plane of the net material is touched. Each of the seating side cushion portions abuts on the entire surface of the bulging back plane, and each of the net material end faces in the net material front-rear direction and the net material width direction orthogonal to the net material thickness direction of the three-dimensional three-dimensional net-like material. A fifth step of laminating the three-dimensional net-like material on the seating side cushion portion of the cushion prototype sheet along the end of the cushion.
In the cushion prototype sheet in which the three-dimensional three-dimensional net-like material is laminated, the front side cushion portion, the rear side cushion portion, the left side cushion portion, and the right side cushion portion are formed on the cushion of the seating side cushion portion of the cushion prototype seat. The sixth step of bending to the back plane side and contacting the end faces of the net materials of the three-dimensional three-dimensional net-like material, and
A seventh step of bonding and fixing said front cushion part is bent into the cushion back plane side, the left and right cushion portion is bent into the cushion back plane side,
A method of manufacturing a seat cushion, which comprises.
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