JP6824811B2

JP6824811B2 - Vehicle seat

Info

Publication number: JP6824811B2
Application number: JP2017089899A
Authority: JP
Inventors: 裕文渡邉; 耕一中矢; 正人嶋田
Original assignee: Mazda Motor Corp; Toyota Boshoku Corp
Current assignee: Mazda Motor Corp; Toyota Boshoku Corp
Priority date: 2017-04-28
Filing date: 2017-04-28
Publication date: 2021-02-03
Anticipated expiration: 2037-04-28
Also published as: JP2018187963A

Description

本発明は、乗物用シートに関する。 The present invention relates to a vehicle seat.

パネルタイプのクッションフレームであるクッションパンにクッション材としてウレタン発泡体などのクッションパッドを載置した乗物用シートが知られている。特許文献１には、クッションパッドの下面の下方に向かう凸形状に応じてその形状を下方に凹む凹形状としたクッションパンにおいて、着座乗員の左右の座骨結節部に対応する部位に前後方向に延びる長孔が設けられているものが開示されている。 A vehicle seat in which a cushion pad such as urethane foam is placed as a cushion material on a cushion pan which is a panel type cushion frame is known. According to Patent Document 1, in a cushion pan having a concave shape in which the shape is recessed downward according to a downwardly convex shape of the lower surface of the cushion pad, the cushion pan extends in the front-rear direction to a portion corresponding to the left and right ischial nodules of the seated occupant. Those provided with elongated holes are disclosed.

特開２０１６−１４７５２７号公報Japanese Unexamined Patent Publication No. 2016-147527

特許文献１に開示された技術においては、クッションパンに設けられた長孔によって、クッションパッドからクッションパンに伝わる圧力を逃がし易くして、クッションパッド上面における着座乗員の左右の座骨結節部に対応する部位の座圧を低下させることができる。そして、クッションパッド上面の座圧分布をより均一化した状態に近づけることができる。しかし、上記技術においては、クッションパッドの下面の一部が長孔の中に陥入したとき、クッションパッドにおいて長孔の周縁部に当接した部分に亀裂が入るおそれがあった。また、長孔が設けられることによってクッションパンの剛性が低下し、特にクッションパッドの下面の前側を支持する前方に向けて上方に傾斜する傾斜面部の剛性が弱まり、着座者の臀部の前滑りが生じやすいという問題があった。 In the technique disclosed in Patent Document 1, the elongated holes provided in the cushion pan facilitate the release of pressure transmitted from the cushion pad to the cushion pan, and correspond to the left and right seat bone nodules of the seated occupant on the upper surface of the cushion pad. The sitting pressure of the site can be reduced. Then, the sitting pressure distribution on the upper surface of the cushion pad can be brought closer to a more uniform state. However, in the above technique, when a part of the lower surface of the cushion pad is recessed into the elongated hole, there is a possibility that a crack may occur in the portion of the cushion pad that comes into contact with the peripheral edge of the elongated hole. In addition, the provision of the elongated holes reduces the rigidity of the cushion pan, and in particular, the rigidity of the inclined surface portion that inclines upward toward the front supporting the front side of the lower surface of the cushion pad is weakened, and the front slip of the buttocks of the seated person is prevented. There was a problem that it was easy to occur.

本発明は、このような点に鑑みて創案されたものである。クッションパン上にクッションパッドを載置した乗物用シートにおいて、着座者が着座したときの座圧分布をより均一化したものにするとともにクッションパッドの亀裂及びクッションパンの剛性の低下を抑制した乗物用シートを提供することを課題とする。 The present invention has been devised in view of these points. In a vehicle seat in which a cushion pad is placed on a cushion pan, the seat pressure distribution when the seated person is seated is made more uniform, and cracks in the cushion pad and a decrease in the rigidity of the cushion pan are suppressed. The task is to provide a seat.

本発明の第１発明は、クッション材であるクッションパッドが骨格部材であるクッションパンによって支持される乗物用シートであって、前記クッションパンは、着座乗員の一対の座骨結節部に対応する領域である第１クッションパン部と、該第１クッションパン部の前方に位置して前記着座乗員の大腿部を支持する領域である第２クッションパン部と、を有し、前記第２クッションパン部には前記第１クッションパン部から前方に向かうにつれて上方に傾斜する傾斜面部が設けられており、前記第１クッションパン部から前記傾斜面部にかけて前記一対の座骨結節部のそれぞれに対応する部位を通り前後方向に延びる下方に凹んだ一対の凹部が形成されていることを特徴とする。 The first invention of the present invention is a vehicle seat in which a cushion pad which is a cushion material is supported by a cushion pan which is a skeleton member, and the cushion pan is a region corresponding to a pair of seat bone nodules of a seated occupant. The second cushion pan portion has a first cushion pan portion and a second cushion pan portion that is located in front of the first cushion pan portion and is a region that supports the thigh portion of the seated occupant. Is provided with an inclined surface portion that inclines upward from the first cushion pan portion toward the front, and passes through a portion corresponding to each of the pair of sciatic nodule portions from the first cushion pan portion to the inclined surface portion. It is characterized in that a pair of downwardly recessed recesses extending in the front-rear direction are formed.

第１発明によれば、クッションパンの一対の座骨結節部に対応する部位に孔を設けることなく一対の凹部を設けることで、クッションパッド上面における一対の座骨結節部に対応する部位の座圧を低下させて座圧分布をより均一化した状態に近づけることができる。そして、クッションパッドの下面の一部が孔の中に陥入したとき、クッションパッドにおいて孔の周縁部に当接した部分に亀裂が入るのを抑制できる。また、一対の凹部は第１クッションパン部から傾斜面部にかけて形成されているので、一対の凹部がリブとして作用して傾斜面部の剛性を高めて着座者の臀部の前滑りを抑制できる。 According to the first invention, by providing a pair of recesses without providing holes in the portion corresponding to the pair of ischial nodules of the cushion pan, the seating pressure of the portion corresponding to the pair of ischial nodules on the upper surface of the cushion pad can be increased. It can be lowered to bring the sitting pressure distribution closer to a more uniform state. Then, when a part of the lower surface of the cushion pad is recessed into the hole, it is possible to prevent the cushion pad from cracking in the portion in contact with the peripheral edge of the hole. Further, since the pair of recesses are formed from the first cushion pan portion to the inclined surface portion, the pair of recesses act as ribs to increase the rigidity of the inclined surface portion and suppress the forward slip of the buttocks of the seated person.

本発明の第２発明は、上記第１発明において、前記一対の凹部における下方に凹む深さは、前記第１クッションパン部において前記傾斜面部より深く形成されていることを特徴とする。 A second aspect of the present invention is characterized in that, in the first invention, the downward recessing depth of the pair of recesses is formed deeper than the inclined surface portion in the first cushion pan portion.

第２発明によれば、クッションパッドの肉厚が薄い場合に、一対の座骨結節部に対応するクッションパッドの下面の一部が陥入する量を増やしてクッションパッド上面における一対の座骨結節部に対応する部位の座圧を低下させることができる。これによって、クッションパッド上面における一対の座骨結節部に対応する部位の座圧を低下させて座圧分布をより均一化した状態に近づけることができる。 According to the second invention, when the wall thickness of the cushion pad is thin, the amount of invagination of a part of the lower surface of the cushion pad corresponding to the pair of ischial nodules is increased to form the pair of ischial nodules on the upper surface of the cushion pad. The sitting pressure of the corresponding site can be reduced. As a result, the sitting pressure of the portion corresponding to the pair of ischial nodules on the upper surface of the cushion pad can be reduced to bring the sitting pressure distribution closer to a more uniform state.

本発明の第３発明は、上記第１発明において、前記一対の凹部における下方に凹む深さは、前記傾斜面部において前記第１クッションパン部より深く形成されていることを特徴とする。 A third aspect of the present invention is characterized in that, in the first invention, the downward recessing depth of the pair of recesses is formed deeper than that of the first cushion pan portion in the inclined surface portion.

第３発明によれば、クッションパッドの肉厚が厚い場合には、一対の座骨結節部に対応するクッションパッドの下面の一部が陥入する量を増やさなくともクッションパッド上面における一対の座骨結節部に対応する部位の座圧を低下させることができる。かかる場合に、傾斜面部における一対の凹部の下方に凹む深さを大きくすることによって傾斜面部の剛性を高めて着座者の臀部の前滑りを抑制できる。 According to the third invention, when the wall thickness of the cushion pad is thick, the pair of ischial nodules on the upper surface of the cushion pad without increasing the amount of intrusion of a part of the lower surface of the cushion pad corresponding to the pair of ischial nodules. The sitting pressure of the part corresponding to the part can be reduced. In such a case, the rigidity of the inclined surface portion can be increased by increasing the depth of the recessing below the pair of concave portions in the inclined surface portion, and the forward slip of the buttocks of the seated person can be suppressed.

本発明の第４発明は、上記第１発明から上記第３発明のいずれかにおいて、前記第２クッションパン部には前記傾斜面部の前方に位置して前記第１クッションパン部とほぼ平行に前方に向かって延びる平坦面部が設けられ、前記一対の凹部は前記傾斜面部から前記平坦面部にかけて延長して形成されていることを特徴とする。 According to the fourth aspect of the present invention, in any one of the first to third inventions, the second cushion pan portion is located in front of the inclined surface portion and is approximately parallel to the first cushion pan portion. A flat surface portion extending toward the surface is provided, and the pair of recesses are formed so as to extend from the inclined surface portion to the flat surface portion.

第４発明によれば、着座乗員の大腿部をクッションパッドを介して主として支持する平坦面部に一対の凹部が形成されているので、クッションパッド上面における大腿部に対応する部位の座圧を低下させて座圧分布をより均一化した状態に近づけることができる。 According to the fourth invention, since a pair of recesses are formed in the flat surface portion that mainly supports the thigh portion of the seated occupant via the cushion pad, the seating pressure of the portion corresponding to the thigh portion on the upper surface of the cushion pad is applied. It can be lowered to bring the sitting pressure distribution closer to a more uniform state.

本発明の第５発明は、上記第４発明において、前記一対の凹部の左右方向の幅は、前記第２クッションパン部において前記第１クッションパン部より大きく形成されていることを特徴とする。 A fifth aspect of the present invention is characterized in that, in the fourth aspect of the present invention, the width of the pair of recesses in the left-right direction is formed larger in the second cushion pan portion than in the first cushion pan portion.

第５発明によれば、着座乗員の大腿部をクッションパッドを介して主として支持する平坦面部に、より幅の大きい一対の凹部が形成されているので、クッションパッド上面における大腿部に対応する部位の座圧をより低下させて座圧分布をより均一化した状態に近づけることができる。 According to the fifth invention, since a pair of wider recesses are formed on the flat surface portion that mainly supports the thigh portion of the seated occupant via the cushion pad, it corresponds to the thigh portion on the upper surface of the cushion pad. It is possible to further reduce the sitting pressure of the site to bring the sitting pressure distribution closer to a more uniform state.

本発明の第６発明は、上記第４発明又は上記第５発明において、前記一対の凹部は、前記平坦面部において左右連結されて一体化されていることを特徴とする。 The sixth invention of the present invention is characterized in that, in the fourth invention or the fifth invention, the pair of recesses are left and right connected and integrated on the flat surface portion.

第６発明によれば、着座乗員の大腿部をクッションパッドを介して主として支持する平坦面部に、左右連結されて一体化された幅の大きい凹部が形成されているので、クッションパッド上面における大腿部に対応する部位の座圧をさらに低下させて座圧分布をより均一化した状態に近づけることができる。 According to the sixth invention, the flat surface portion that mainly supports the thigh portion of the seated occupant via the cushion pad is formed with a large recess that is connected to the left and right and integrated, so that the large recess is formed on the upper surface of the cushion pad. It is possible to further reduce the sitting pressure of the portion corresponding to the thigh to bring the sitting pressure distribution closer to a more uniform state.

本発明の第７発明は、上記第４発明において、前記第２クッションパン部には前記一対の凹部のシート幅方向外側に前記一対の凹部と離間してシート前後方向に延びる他の凹部がさらに設けられていることを特徴とする。 In the seventh aspect of the present invention, in the fourth aspect, the second cushion pan portion is further provided with another recess extending in the front-rear direction of the seat apart from the pair of recesses on the outside in the seat width direction of the pair of recesses. It is characterized in that it is provided.

第７発明によれば、第２クッションパン部には一対の凹部に加えて他の凹部が形成されているので、一対の凹部及び他の凹部がリブとして作用して第２クッションパン部の剛性を高めて着座者の臀部の前滑りを抑制できる。 According to the seventh invention, since the second cushion pan portion is formed with other recesses in addition to the pair of recesses, the pair of recesses and the other recesses act as ribs to form the rigidity of the second cushion pan portion. Can be increased to prevent the seated person from slipping forward on the buttocks.

本発明の第１実施形態のシートクッションの斜視図である。It is a perspective view of the seat cushion of 1st Embodiment of this invention. 上記実施形態に係るクッションパンの斜視図である。It is a perspective view of the cushion pan which concerns on the said embodiment. 上記実施形態に係るクッションパンの平面図である。It is a top view of the cushion pan which concerns on the said embodiment. 図３のＩＶ−ＩＶ矢視線断面図である。FIG. 3 is a cross-sectional view taken along the line of the IV-IV arrow of FIG. 図３のＶ−Ｖ矢視線断面図である。FIG. 3 is a cross-sectional view taken along the line of the VV arrow in FIG. 図３のＶＩ−ＶＩ矢視線断面図である。FIG. 3 is a cross-sectional view taken along the line of the VI-VI arrow of FIG. 本発明の第２実施形態における図５に対応する断面図である。It is sectional drawing corresponding to FIG. 5 in the 2nd Embodiment of this invention. 本発明の第２実施形態における図６に対応する断面図である。It is sectional drawing corresponding to FIG. 6 in the 2nd Embodiment of this invention. 本発明の第３実施形態に係るクッションパンの斜視図である。It is a perspective view of the cushion pan which concerns on 3rd Embodiment of this invention. 本発明の第４実施形態に係るクッションパンの斜視図である。It is a perspective view of the cushion pan which concerns on 4th Embodiment of this invention. 本発明の第５実施形態に係るクッションパンの斜視図である。It is a perspective view of the cushion pan which concerns on 5th Embodiment of this invention.

図１〜図６は、本発明の第１実施形態を示す図である。第１実施形態は、自動車用フロントシートのシートクッションに本発明を適用した例である。各図中、矢印によりシートクッションを自動車フロアに取付けた時の自動車及びシートクッションの各方向を示している。以下の説明において、方向に関する記述は、この方向を基準として行うものとする。 1 to 6 are views showing a first embodiment of the present invention. The first embodiment is an example in which the present invention is applied to a seat cushion of an automobile front seat. In each figure, the arrows indicate the directions of the automobile and the seat cushion when the seat cushion is attached to the automobile floor. In the following description, the description regarding the direction shall be made with reference to this direction.

図１及び図４〜図６に示すように、シートクッション１は、クッションフレーム（図示せず）に支持されて下方に向かって凹む形状の骨格部材としてのクッションパン１０と、クッションパン１０の上に載置されクッション材の役割を果たすクッションパッド２０と、クッションパッド２０の表面を覆うクッションカバー３０と、を備える。シートクッション１の後端部側には、起立状態のシートバックの下端部が取付けられて自動車用フロントシートが形成される。クッションパッド２０は、ウレタン発泡体製のクッション材で、主として着座者の体重を支えるメイン部２１とその左右のサイド部２２を備える。メイン部２１とサイド部２２の境界には縦溝部２３が設けられている。メイン部２１には、主として意匠的な要請から左右方向に延びる横溝部２４がメイン部２１の前後方向略中央部に２本平行して設けられている。クッションカバー３０はファブリック、本革等のピースを縫い合わせて立体形状に形成したものでクッションパッド２０の上に被せられてその周囲やクッションパッド２０の縦溝部２３及び横溝部２４に対応する部分をクッションパン１０やクッションパッド２０に対して固定して取付けられている。クッションパッド２０が特許請求の範囲記載の「クッション材」に相当する。 As shown in FIGS. 1 and 4 to 6, the seat cushion 1 has a cushion pan 10 as a skeleton member supported by a cushion frame (not shown) and recessed downward, and above the cushion pan 10. A cushion pad 20 that is placed on the cushion pad 20 and serves as a cushion material, and a cushion cover 30 that covers the surface of the cushion pad 20 are provided. The lower end of the upright seat back is attached to the rear end side of the seat cushion 1 to form an automobile front seat. The cushion pad 20 is a cushioning material made of urethane foam, and includes a main portion 21 that mainly supports the weight of the seated person and side portions 22 on the left and right sides thereof. A vertical groove portion 23 is provided at the boundary between the main portion 21 and the side portion 22. The main portion 21 is provided with two lateral groove portions 24 extending in the left-right direction mainly in parallel with the substantially central portion in the front-rear direction of the main portion 21 due to a design request. The cushion cover 30 is formed by sewing pieces of fabric, genuine leather, etc. into a three-dimensional shape, and is placed on the cushion pad 20 to cushion the periphery thereof and the portion corresponding to the vertical groove portion 23 and the horizontal groove portion 24 of the cushion pad 20. It is fixedly attached to the pan 10 and the cushion pad 20. The cushion pad 20 corresponds to the "cushion material" described in the claims.

図２〜図６に示すように、クッションパン１０は、鋼板やアルミ板等の金属板をプレス成形して形成されてもよいし、複合樹脂成形体として形成されてもよい。複合樹脂成形体としては、ガラスやカーボンの織物を積層してエポキシや不飽和ポリエステル等のマトリクス樹脂を含浸硬化させて成形したものであってもよい。また、複合樹脂成形体としては、オレフィン系樹脂やポリアミド等の樹脂にガラスファイバーやカーボンファイバーを分散させた状態の複合樹脂をインジェクション成形やスタンピング成形で成形したものであってもよい。クッションパン１０は、上面視で概略矩形状をしており、着座乗員の一対の座骨結節部に対応して着座乗員の臀部を支持する第１クッションパン部１１と、第１クッションパン部１１の前方に位置して着座乗員の大腿部を支持する第２クッションパン部１２と、を有する。第１クッションパン部１１と第２クッションパン部１２は、クッションパッド２０のメイン部２１を支持する部分である。また、クッションパン１０は、第１クッションパン部１１と第２クッションパン部１２の左右両側にクッションパッド２０のサイド部２２を支持する第３クッションパン部１３を有する。 As shown in FIGS. 2 to 6, the cushion pan 10 may be formed by press-molding a metal plate such as a steel plate or an aluminum plate, or may be formed as a composite resin molded body. The composite resin molded product may be formed by laminating glass or carbon woven fabrics, impregnating and curing a matrix resin such as epoxy or unsaturated polyester. Further, the composite resin molded product may be a composite resin in which glass fibers or carbon fibers are dispersed in a resin such as an olefin resin or a polyamide, which may be molded by injection molding or stamping molding. The cushion pan 10 has a substantially rectangular shape when viewed from above, and the first cushion pan portion 11 and the first cushion pan portion 11 that support the buttocks of the seated occupant corresponding to the pair of seat bone nodules of the seated occupant. It has a second cushion pan portion 12 which is located forward and supports the thigh portion of the seated occupant. The first cushion pan portion 11 and the second cushion pan portion 12 are portions that support the main portion 21 of the cushion pad 20. Further, the cushion pan 10 has a third cushion pan portion 13 that supports the side portions 22 of the cushion pad 20 on both the left and right sides of the first cushion pan portion 11 and the second cushion pan portion 12.

図４及び図５に示すように、第１クッションパン部１１は、前後方向の略中央部から後端部側にかけて前後長の４０％程度の長さ延び、左右方向の中心線を中心に左右長の６０％程度の長さ左右方向に延びるほぼ水平な面部として形成されている。そして、第１クッションパン部１１は、クッションパン１０の中で最も下方に凹んだ部分として形成されている。第１クッションパン部１１には、左右方向の中心線を中心に平行して前後方向に延びる下方に凹んだ左右一対の第１溝部１１ａが形成されている。一対の第１溝部１１ａの横断面は、いずれも上方に向かって開口した略Ｕ字状をしている。一対の第１溝部１１ａの左右方向の幅（開口端部の左右間の距離）はいずれも３０〜９０ｍｍ程度で、下方への凹み深さはいずれも８〜１０ｍｍ程度である。また、一対の第１溝部１１ａの左右方向中心線の間の間隔は、６０〜７０ｍｍ程度に設定されている。この６０〜７０ｍｍ程度の間隔は、ＡＭ５０型ダミーの座骨結節の間隔にほぼ等しい。なお、ＡＭ５０型ダミーとは、米国法規に規定されている米国人成人男性５０％をカバーする乗員ダミーをいう。一対の第１溝部１１ａの左右方向中心線の間の間隔がＡＭ５０型ダミーの座骨結節の間隔にほぼ等しく設定され、一対の第１溝部１１ａの左右方向の幅は３０〜９０ｍｍ程度に設定されているので、日本人成人及び米国人成人のほとんどの体形の人の座骨結節位置は、この一対の第１溝部１１ａに対応する位置にくることになる。図２に示すように、第１クッションパン部１１の一対の第１溝部１１ａの左右方向シート外側には、クッションパン１０をクッションフレームに取付けるための一対のボルト孔１１ｂが設けられている。ここで、第１溝部１１ａが、特許請求の範囲の「凹部」に相当する。 As shown in FIGS. 4 and 5, the first cushion pan portion 11 extends from a substantially central portion in the front-rear direction to the rear end portion side by about 40% of the front-rear length, and is left and right around the center line in the left-right direction. It is formed as a substantially horizontal surface portion extending in the left-right direction with a length of about 60% of the length. The first cushion pan portion 11 is formed as the most downwardly recessed portion of the cushion pan 10. The first cushion pan portion 11 is formed with a pair of left and right first groove portions 11a that extend in the front-rear direction in parallel with the center line in the left-right direction and are recessed downward. The cross section of the pair of first groove portions 11a has a substantially U-shape that opens upward. The width of the pair of first groove portions 11a in the left-right direction (distance between the left and right sides of the opening end portion) is about 30 to 90 mm, and the downward recess depth is about 8 to 10 mm. The distance between the pair of first groove portions 11a in the left-right direction is set to about 60 to 70 mm. The distance of about 60 to 70 mm is substantially equal to the distance of the ischial nodules of the AM50 type dummy. The AM50 type dummy is a crew dummy that covers 50% of American adult males as stipulated in US regulations. The distance between the pair of first groove portions 11a in the left-right direction is set to be substantially equal to the distance between the ischial nodules of the AM50 type dummy, and the width of the pair of first groove portions 11a in the left-right direction is set to about 30 to 90 mm. Therefore, the ischial nodule position of most body shapes of Japanese adults and American adults will come to the position corresponding to this pair of first groove portions 11a. As shown in FIG. 2, a pair of bolt holes 11b for attaching the cushion pan 10 to the cushion frame are provided on the outside of the pair of first groove portions 11a of the first cushion pan portion 11 in the left-right direction. Here, the first groove portion 11a corresponds to the "recess" in the claims.

図４及び図６に示すように、第２クッションパン部１２は、第１クッションパン部１１の前端部側から前方に向かうにつれて上方に傾斜する傾斜面部１２Ｓと、傾斜面部１２Ｓの上端部側から第１クッションパン部１１とほぼ平行に前方に向かって延びる平坦面部１２Ｆと、を有する。第２クッションパン部１２には、第１クッションパン部１１の一対の第１溝部１１ａが前方に延長された一対の第２溝部１２ａが形成されている。すなわち、一対の第１溝部１１ａの左右方向の中心線と、第２溝部１２ａの左右方向の中心線と、はそれぞれ一致している。一対の第２溝部１２ａの左右方向の幅（開口端部の左右間の距離）は一対の第１溝部１１ａと同じく３０〜９０ｍｍの範囲で第１溝部１１ａと同幅に設定されているが、下方への凹み深さは３〜５ｍｍ程度である。また、一対の第２溝部１２ａの左右方向中心線の間の間隔は、第１溝部１１ａと同じく６０〜７０ｍｍの範囲で第１溝部１１ａと同寸法とされている。第１溝部１１ａの凹み深さの方が、第２溝部１２ａの凹み深さより大きく設定されているのは、薄肉のクッションパッド２０に対応するためである。薄肉のクッションパッド２０の場合、座骨結節部に対応するクッションパッド２０の着座面における座圧が大きくなるのでこの座圧を低めるために第１クッションパン部１１にはより凹み深さの大きい一対の第１溝部１１ａが設けられる。一方、第２クッションパン部１２の傾斜面部１２Ｓにおいては、剛性を確保するのに必要最低限の凹み深さの一対の第２溝部１２ａが設けられている。しかし、第２溝部１２ａの凹み深さを第１溝部１１ａの凹み深さと同じ深さに設定してもよい。この場合には、傾斜面部１２Ｓの剛性をより高くすることができる。図２に示すように、第２クッションパン部１２の平坦面部１２Ｆの前端部側において、一対の第２溝部１２ａの左右方向シート外側には、クッションパン１０をクッションフレームに取付けるための一対のボルト孔１２ｂが設けられている。ここで、第２溝部１２ａが、特許請求の範囲の「凹部」に相当する。 As shown in FIGS. 4 and 6, the second cushion pan portion 12 has an inclined surface portion 12S that inclines upward from the front end portion side of the first cushion pan portion 11 toward the front, and from the upper end portion side of the inclined surface portion 12S. It has a flat surface portion 12F extending forward in substantially parallel to the first cushion pan portion 11. The second cushion pan portion 12 is formed with a pair of second groove portions 12a in which a pair of first groove portions 11a of the first cushion pan portion 11 is extended forward. That is, the center line in the left-right direction of the pair of first groove portions 11a and the center line in the left-right direction of the second groove portion 12a coincide with each other. The width of the pair of second groove portions 12a in the left-right direction (distance between the left and right of the opening end portion) is set to be the same as that of the first groove portion 11a in the range of 30 to 90 mm like the pair of first groove portions 11a. The downward dent depth is about 3 to 5 mm. Further, the distance between the center lines in the left-right direction of the pair of second groove portions 12a is the same as that of the first groove portion 11a in the range of 60 to 70 mm. The recess depth of the first groove portion 11a is set to be larger than the recess depth of the second groove portion 12a in order to correspond to the thin cushion pad 20. In the case of the thin-walled cushion pad 20, the seating pressure on the seating surface of the cushion pad 20 corresponding to the ischial bone nodule becomes large. Therefore, in order to reduce the sitting pressure, the first cushion pan portion 11 has a pair of dented depths. The first groove portion 11a is provided. On the other hand, in the inclined surface portion 12S of the second cushion pan portion 12, a pair of second groove portions 12a having a minimum recessed depth necessary for ensuring rigidity are provided. However, the recess depth of the second groove portion 12a may be set to the same depth as the recess depth of the first groove portion 11a. In this case, the rigidity of the inclined surface portion 12S can be further increased. As shown in FIG. 2, on the front end side of the flat surface portion 12F of the second cushion pan portion 12, a pair of bolts for attaching the cushion pan 10 to the cushion frame on the lateral side of the pair of second groove portions 12a. A hole 12b is provided. Here, the second groove portion 12a corresponds to the "recess" in the claims.

図３〜図６に示すように、クッションパン１０の前後左右の周縁部には、下方に向かって延びる周縁壁部１４が設けられている。周縁壁部１４は、対向するクッションパン１０の本体部と相俟って周縁部の剛性を高めるとともに、クッションカバー３０の端末部を係止する部分としての機能を有する。 As shown in FIGS. 3 to 6, peripheral wall portions 14 extending downward are provided on the front, rear, left, and right peripheral edges of the cushion pan 10. The peripheral wall portion 14 has a function as a portion for locking the terminal portion of the cushion cover 30 while increasing the rigidity of the peripheral portion in combination with the main body portion of the facing cushion pan 10.

以上のように構成される第１実施形態は、以下のような作用効果を奏する。クッションパン１０の一対の座骨結節部に対応する部位に孔を設けることなく一対の第１溝部１１ａを設けることで、クッションパッド２０の上面における一対の座骨結節部に対応する部位の座圧を低下させて座圧分布をより均一化した状態に近づけることができる。そして、クッションパッド２０の下面の一部が孔の中に陥入したとき、クッションパッド２０において孔の周縁部に当接した部分に亀裂が入るのを抑制できる。また、一対の第１溝部１１ａから連続して延びる第２溝部１２ａが第２クッションパン部１２に形成されているので、一対の第２溝部１２ａがリブとして作用して傾斜面部１２Ｓの剛性を高めて着座者の臀部の前滑りを抑制できる。また、第１溝部１１ａの凹み深さは、第２溝部１２ａの凹み深さより大きく形成されているので、クッションパッド２０の肉厚が薄い場合に、一対の座骨結節部に対応するクッションパッド２０の下面の一部が第１溝部１１ａに陥入する量を増やしてクッションパッド２０の上面における一対の座骨結節部に対応する部位の座圧を低下させることができる。これによって、クッションパッド上面における一対の座骨結節部に対応する部位の座圧を低下させて座圧分布をより均一化した状態に近づけることができる。 The first embodiment configured as described above has the following effects. By providing the pair of first groove portions 11a without providing holes in the portions corresponding to the pair of ischial nodules of the cushion pan 10, the sitting pressure of the portion corresponding to the pair of ischial nodules on the upper surface of the cushion pad 20 is reduced. It is possible to bring the sitting pressure distribution closer to a more uniform state. Then, when a part of the lower surface of the cushion pad 20 is recessed into the hole, it is possible to prevent the cushion pad 20 from cracking in the portion in contact with the peripheral edge of the hole. Further, since the second groove portion 12a continuously extending from the pair of first groove portions 11a is formed in the second cushion pan portion 12, the pair of second groove portions 12a acts as ribs to increase the rigidity of the inclined surface portion 12S. It is possible to suppress the front slip of the buttocks of the seated person. Further, since the recess depth of the first groove portion 11a is formed to be larger than the recess depth of the second groove portion 12a, when the wall thickness of the cushion pad 20 is thin, the cushion pad 20 corresponding to the pair of ischial nodules It is possible to increase the amount of a part of the lower surface invading the first groove portion 11a and reduce the sitting pressure of the portion of the upper surface of the cushion pad 20 corresponding to the pair of ischial nodules. As a result, the sitting pressure of the portion corresponding to the pair of ischial nodules on the upper surface of the cushion pad can be reduced to bring the sitting pressure distribution closer to a more uniform state.

さらに、第２クッションパン部１２には傾斜面部１２Ｓの前方に位置して第１クッションパン部１１とほぼ平行に前方に向かって延びる平坦面部１２Ｆが設けられ、一対の第２溝部１２ａは傾斜面部１２Ｓから平坦面部１２Ｆにかけて形成されている。これによって、着座乗員の大腿部をクッションパッド２０を介して主として支持する平坦面部１２Ｆに一対の第２溝部１２ａが形成されているので、クッションパッド２０の上面における大腿部に対応する部位の座圧を低下させて座圧分布をより均一化した状態に近づけることができる。 Further, the second cushion pan portion 12 is provided with a flat surface portion 12F located in front of the inclined surface portion 12S and extending forward substantially parallel to the first cushion pan portion 11, and the pair of second groove portions 12a are provided with the inclined surface portions 12a. It is formed from 12S to the flat surface portion 12F. As a result, a pair of second groove portions 12a are formed on the flat surface portion 12F that mainly supports the thigh portion of the seated occupant via the cushion pad 20, so that the portion corresponding to the thigh portion on the upper surface of the cushion pad 20 is formed. It is possible to reduce the sitting pressure to bring the sitting pressure distribution closer to a more uniform state.

図７及び図８は、本発明の第２実施形態を示す図である。第１実施形態と重複する構成に関しては、図面に同一の符号を付して説明を省略する。第１実施形態との違いは、第１溝部１１ａ１の凹み深さは、第２溝部１２ａ１の凹み深さより小さく形成されている点である。第１溝部１１ａ１の凹み深さは、３〜５ｍｍ程度であり、第２溝部１２ａの凹み深さは、８〜１０ｍｍ程度である。第２実施形態によれば、クッションパッド２０の肉厚が厚い場合には、一対の座骨結節部に対応するクッションパッド２０の下面の一部が第１溝部１１ａ１に陥入する量を増やさなくともクッションパッド上面における一対の座骨結節部に対応する部位の座圧を低下させることができる。かかる場合に、傾斜面部１２Ｓにおける一対の第２溝部１２ａ１の下方に凹む深さを大きくすることによって傾斜面部１２Ｓの剛性を高めて着座者の臀部の前滑りを抑制できる。ここで、第１溝部１１ａ１と第２溝部１２ａ１が、それぞれ、特許請求の範囲の「凹部」に相当する。 7 and 8 are views showing a second embodiment of the present invention. Regarding the configuration overlapping with the first embodiment, the same reference numerals are given to the drawings and the description thereof will be omitted. The difference from the first embodiment is that the recess depth of the first groove portion 11a1 is formed to be smaller than the recess depth of the second groove portion 12a1. The recess depth of the first groove portion 11a1 is about 3 to 5 mm, and the recess depth of the second groove portion 12a is about 8 to 10 mm. According to the second embodiment, when the wall thickness of the cushion pad 20 is thick, the amount of a part of the lower surface of the cushion pad 20 corresponding to the pair of ischial nodules invading the first groove portion 11a1 is not increased. It is possible to reduce the sitting pressure of the portion corresponding to the pair of ischial nodules on the upper surface of the cushion pad. In such a case, the rigidity of the inclined surface portion 12S can be increased by increasing the depth of recessing below the pair of second groove portions 12a1 in the inclined surface portion 12S, and the forward slip of the buttocks of the seated person can be suppressed. Here, the first groove portion 11a1 and the second groove portion 12a1 each correspond to the "recess" in the claims.

図９は、本発明の第３実施形態を示す図である。第１実施形態と重複する構成に関しては、図面に同一の符号を付して説明を省略する。第１実施形態との違いは、第２溝部１２ａ２の左右方向の幅が傾斜面部１２Ｓにおいて前上方に向かうにつれて広くなっている点である。平坦面部１２Ｆにおける第２溝部１２ａ２の左右方向の幅は一定で、第１溝部１１ａの左右方向の幅の１．５倍程度に設定されている。第２溝部１２ａ２の凹み深さは第１実施形態の第２溝部１２ａの凹み深さと同程度である。第３実施形態によれば、着座乗員の大腿部をクッションパッド２０を介して主として支持する平坦面部１２Ｆに、より幅の大きい一対の第２溝部１２ａ２が形成されているので、クッションパッド２０の上面における大腿部に対応する部位の座圧をより低下させて座圧分布をより均一化した状態に近づけることができる。ここで、第２溝部１２ａ２が、特許請求の範囲の「凹部」に相当する。 FIG. 9 is a diagram showing a third embodiment of the present invention. Regarding the configuration overlapping with the first embodiment, the same reference numerals are given to the drawings and the description thereof will be omitted. The difference from the first embodiment is that the width of the second groove portion 12a2 in the left-right direction becomes wider in the inclined surface portion 12S toward the front and upper sides. The width of the second groove portion 12a2 on the flat surface portion 12F in the left-right direction is constant, and is set to about 1.5 times the width of the first groove portion 11a in the left-right direction. The recess depth of the second groove portion 12a2 is about the same as the recess depth of the second groove portion 12a of the first embodiment. According to the third embodiment, since a pair of wider second groove portions 12a2 are formed on the flat surface portion 12F that mainly supports the thigh portion of the seated occupant via the cushion pad 20, the cushion pad 20 It is possible to further reduce the sitting pressure of the portion corresponding to the thigh on the upper surface to bring the sitting pressure distribution closer to a more uniform state. Here, the second groove portion 12a2 corresponds to the "recess" in the claims.

図１０は、本発明の第４実施形態を示す図である。第１実施形態と重複する構成に関しては、図面に同一の符号を付して説明を省略する。第１実施形態との違いは、第２溝部１２ａ３が傾斜面部１２Ｓから平坦面部１２Ｆにかけて１本に形成されている点である。第２溝部１２ａ３の左右方向の幅は、一対の第１溝部１１ａの左右方向で最もシート外側に位置する開口端部間の間隔とされ、第１溝部１１ａの左右方向の幅のほぼ３倍程度とされている。第２溝部１２ａ３の凹み深さは第１実施形態の第２溝部１２ａの凹み深さと同程度である。第４実施形態によれば、着座乗員の大腿部をクッションパッド２０を介して主として支持する平坦面部１２Ｆに、左右連結されて一体化された幅の大きい第２溝部１２ａ３が形成されているので、クッションパッド２０の上面における大腿部に対応する部位の座圧をさらに低下させて座圧分布をより均一化した状態に近づけることができる。ここで、第３溝部１２ａ３が、特許請求の範囲の「凹部」に相当する。 FIG. 10 is a diagram showing a fourth embodiment of the present invention. Regarding the configuration overlapping with the first embodiment, the same reference numerals are given to the drawings and the description thereof will be omitted. The difference from the first embodiment is that the second groove portion 12a3 is formed as one from the inclined surface portion 12S to the flat surface portion 12F. The width of the second groove portion 12a3 in the left-right direction is the distance between the opening ends located on the outermost side of the seat in the left-right direction of the pair of first groove portions 11a, and is approximately three times the width of the first groove portion 11a in the left-right direction. It is said that. The recess depth of the second groove portion 12a3 is about the same as the recess depth of the second groove portion 12a of the first embodiment. According to the fourth embodiment, the flat surface portion 12F that mainly supports the thigh portion of the seated occupant via the cushion pad 20 is formed with a wide second groove portion 12a3 that is connected to the left and right and integrated. , The sitting pressure of the portion corresponding to the thigh on the upper surface of the cushion pad 20 can be further reduced to bring the sitting pressure distribution closer to a more uniform state. Here, the third groove portion 12a3 corresponds to the "recess" in the claims.

図１１は、本発明の第５実施形態を示す図である。第１実施形態と重複する構成に関しては、図面に同一の符号を付して説明を省略する。第１実施形態との違いは、一対の第２溝部１２ａのシート幅方向外側に、傾斜面部１２Ｓから平坦面部１２Ｆにかけて前後方向に延びる一対の補強溝１２ａ４が設けられている点である。補強溝１２ａ４は、その左右方向の幅が第２溝部１２ａより若干狭く、その凹み深さは、第２溝部１２ａと同程度に設定されている。第５実施形態によれば、第２クッションパン部１２には一対の第２溝部１２ａに加えて一対の補強溝１２ａ４が形成されているので、一対の第２溝部１２ａ及び補強溝１２ａ４がリブとして作用して第２クッションパン部１２の剛性を高めて着座者の臀部の前滑りを抑制できる。ここで、補強溝１２ａ４が、特許請求の範囲の「他の凹部」に相当する。 FIG. 11 is a diagram showing a fifth embodiment of the present invention. Regarding the configuration overlapping with the first embodiment, the same reference numerals are given to the drawings and the description thereof will be omitted. The difference from the first embodiment is that a pair of reinforcing grooves 12a4 extending in the front-rear direction from the inclined surface portion 12S to the flat surface portion 12F are provided on the outside of the pair of second groove portions 12a in the seat width direction. The width of the reinforcing groove 12a4 in the left-right direction is slightly narrower than that of the second groove portion 12a, and the recess depth thereof is set to be about the same as that of the second groove portion 12a. According to the fifth embodiment, the second cushion pan portion 12 is formed with a pair of reinforcing grooves 12a4 in addition to the pair of second groove portions 12a, so that the pair of second groove portions 12a and the reinforcing grooves 12a4 serve as ribs. By acting, the rigidity of the second cushion pan portion 12 can be increased to suppress the forward slip of the buttocks of the seated person. Here, the reinforcing groove 12a4 corresponds to the "other recess" in the claims.

以上、特定の実施形態について説明したが、本発明は、それらの外観、構成に限定されず、本発明の要旨を変更しない範囲で種々の変更、追加、削除が可能である。例えば、次のようなものが挙げられる。 Although the specific embodiments have been described above, the present invention is not limited to their appearance and configuration, and various changes, additions, and deletions can be made without changing the gist of the present invention. For example, the following can be mentioned.

１．上記実施形態では、第２クッションパン部１２の傾斜面部１２Ｓから平坦面部１２Ｆに連続する第２溝部１２ａ、１２ａ１、１２ａ２、１２ａ３を設けた。しかし、これに限らず、傾斜面部１２Ｓのみに第２溝部１２ａ、１２ａ１、１２ａ２、１２ａ３を設けてもよい。 1. 1. In the above embodiment, the second groove portions 12a, 12a1, 12a2, 12a3 continuous from the inclined surface portion 12S of the second cushion pan portion 12 to the flat surface portion 12F are provided. However, the present invention is not limited to this, and the second groove portions 12a, 12a1, 12a2, and 12a3 may be provided only on the inclined surface portion 12S.

２．上記実施形態では、自動車用フロントシートのシートクッションに本発明を適用したが、これに限らず、自動車用リアシートのシートクッションに本発明を適用することもできる。その場合は、例えば、３人掛け用のシートクッションの右側部分又は左側部分に本発明を適用できる。 2. 2. In the above embodiment, the present invention is applied to the seat cushion of the front seat for automobiles, but the present invention is not limited to this, and the present invention can also be applied to the seat cushion of the rear seat for automobiles. In that case, for example, the present invention can be applied to the right side portion or the left side portion of the seat cushion for three people.

３．上記実施形態では、クッションパッドとしてウレタン発泡体を用いたがこれに限らず、化学繊維や天然繊維を用いた繊維弾性体等を利用してもよい。 3. 3. In the above embodiment, urethane foam is used as the cushion pad, but the present invention is not limited to this, and a fibrous elastic body using chemical fibers or natural fibers may be used.

４．上記実施形態では、本発明を自動車のシートに適用したが、飛行機、船、電車等に搭載のシートに適用しても良い。 4. In the above embodiment, the present invention is applied to a seat of an automobile, but it may be applied to a seat mounted on an airplane, a ship, a train, or the like.

１シートクッション
１０クッションパン
１１第１クッションパン部
１１ａ第１溝部（凹部）
１１ａ１第１溝部（凹部）
１２第２クッションパン部
１２Ｓ傾斜面部
１２Ｆ平坦面部
１２ａ第２溝部（凹部）
１２ａ１第２溝部（凹部）
１２ａ２第２溝部（凹部）
１２ａ３第２溝部（凹部）
１２ａ４補強溝（他の凹部）
２０クッションパッド（クッション材）

1 Seat cushion 10 Cushion pan 11 1st cushion pan portion 11a 1st groove portion (recess)
11a1 1st groove (recess)
12 Second cushion pan portion 12S Inclined surface portion 12F Flat surface portion 12a Second groove portion (recess)
12a1 2nd groove (recess)
12a2 2nd groove (recess)
12a3 2nd groove (recess)
12a4 Reinforcing groove (other recesses)
20 Cushion pad (cushion material)

Claims

The cushion pad, which is a cushion material, is a vehicle seat supported by a cushion pan, which is a skeleton member.
The cushion pan is formed in a one-sided shape in which the surfaces in contact with the cushion pad are continuous.
The cushion pan is a region corresponding to a pair of seat bone nodules of the seated occupant, and a region located in front of the first cushion pan portion and supporting the thigh portion of the seated occupant. It has a second cushion pan part,
The second cushion pan portion is provided with an inclined surface portion that inclines upward as it goes forward from the first cushion pan portion.
From the first cushion pan portion to the inclined surface portion, a pair of downwardly recessed recesses extending in the anteroposterior direction through the portions corresponding to the pair of ischial nodules are formed .
The pair of recesses is a vehicle seat that is recessed downward with respect to a portion of the first cushion pan portion and the inclined surface portion adjacent to the pair of recesses .

In claim 1, the first cushion pan portion is the most downwardly recessed portion of the cushion pan.
The depth of the pair of recesses that is recessed downward is a vehicle seat that is formed deeper than the inclined surface portion in the first cushion pan portion.

The cushion pad, which is a cushion material, is a vehicle seat supported by a cushion pan, which is a skeleton member.
The cushion pan is a region corresponding to a pair of seat bone nodules of the seated occupant, and a region located in front of the first cushion pan portion and supporting the thigh portion of the seated occupant. It has a second cushion pan part,
The second cushion pan portion is provided with an inclined surface portion that inclines upward as it goes forward from the first cushion pan portion.
From the first cushion pan portion to the inclined surface portion, a pair of downwardly recessed recesses extending in the anteroposterior direction through the portions corresponding to the pair of ischial nodules are formed.
The vehicle seat having a downwardly recessed depth in the pair of recesses is formed deeper than the first cushion pan portion in the inclined surface portion.

The cushion pad, which is a cushion material, is a vehicle seat supported by a cushion pan, which is a skeleton member.
The cushion pan is a region corresponding to a pair of seat bone nodules of the seated occupant, and a region located in front of the first cushion pan portion and supporting the thigh portion of the seated occupant. It has a second cushion pan part,
The second cushion pan portion is provided with an inclined surface portion that inclines upward as it goes forward from the first cushion pan portion.
From the first cushion pan portion to the inclined surface portion, a pair of downwardly recessed recesses extending in the anteroposterior direction through the portions corresponding to the pair of ischial nodules are formed.
The second cushion pan portion is provided with a flat surface portion located in front of the inclined surface portion and extending forward substantially parallel to the first cushion pan portion, and the pair of recesses is formed from the inclined surface portion to the flat surface portion. It is formed by extending to
A vehicle seat in which the width of the pair of recesses in the left-right direction is larger than that of the first cushion pan portion in the second cushion pan portion .

The cushion pad, which is a cushion material, is a vehicle seat supported by a cushion pan, which is a skeleton member.
The cushion pan is a region corresponding to a pair of seat bone nodules of the seated occupant, and a region located in front of the first cushion pan portion and supporting the thigh portion of the seated occupant. It has a second cushion pan part,
The second cushion pan portion is provided with an inclined surface portion that inclines upward as it goes forward from the first cushion pan portion.
From the first cushion pan portion to the inclined surface portion, a pair of downwardly recessed recesses extending in the anteroposterior direction through the portions corresponding to the pair of ischial nodules are formed.
The second cushion pan portion is provided with a flat surface portion located in front of the inclined surface portion and extending forward substantially parallel to the first cushion pan portion, and the pair of recesses is formed from the inclined surface portion to the flat surface portion. It is formed by extending to
The pair of recesses are vehicle seats that are connected and integrated on the flat surface portion .

The cushion pad, which is a cushion material, is a vehicle seat supported by a cushion pan, which is a skeleton member.
The cushion pan is a region corresponding to a pair of seat bone nodules of the seated occupant, and a region located in front of the first cushion pan portion and supporting the thigh portion of the seated occupant. It has a second cushion pan part,
The second cushion pan portion is provided with an inclined surface portion that inclines upward as it goes forward from the first cushion pan portion.
From the first cushion pan portion to the inclined surface portion, a pair of downwardly recessed recesses extending in the anteroposterior direction through the portions corresponding to the pair of ischial nodules are formed.
The second cushion pan portion is provided with a flat surface portion located in front of the inclined surface portion and extending forward substantially parallel to the first cushion pan portion, and the pair of recesses is formed from the inclined surface portion to the flat surface portion. It is formed by extending to
A vehicle seat in which the second cushion pan portion is further provided with other recesses extending in the front-rear direction of the seat apart from the pair of recesses on the outside in the seat width direction of the pair of recesses .