JP2016113035A

JP2016113035A - Side support

Info

Publication number: JP2016113035A
Application number: JP2014253758A
Authority: JP
Inventors: 伊東　博之; Hiroyuki Ito; 博之伊東; 淳一梶川; Junichi Kajikawa; 村田　誠志郎; Seishiro Murata; 誠志郎村田
Original assignee: Toyo Seat Co Ltd; JSP Corp
Current assignee: Toyo Seat Co Ltd; JSP Corp
Priority date: 2014-12-16
Filing date: 2014-12-16
Publication date: 2016-06-23

Abstract

PROBLEM TO BE SOLVED: To provide a side support which supports body of a crew against acceleration in a transverse direction provided by movement of a vehicle, which has an excellent cushion property, in which weight reduction is achieved, and which has an excellent recycling property.SOLUTION: There is provided a side support arranged on both sides of a vehicular sheet, which comprises a side support pad made of foamed synthetic resin having 20 mm or more of curving/flexure level measured according to a method disclosed in JIS K7221-2:2006 and 2 to 100 N press upon 20 mm flexure. The structure of the side support pad has supporting parts 6 arranged on 2 position near both edges separated in a longitudinal direction of the side support pad. An opening part is formed below the long thin cylinder along in the longitudinal direction. A sectional shape in a short direction between the supporting parts has a sectional shape of U-shape or C-shape having an opening bottom.SELECTED DRAWING: Figure 7

Description

本発明は、車両、船舶又は航空機等の乗物用シートの両側に配設されるサイドサポートの構造に関し、特に軽量化やリサイクル性に富み、フィット感、クッション性に富むサイドサポートに関する。 The present invention relates to a structure of a side support disposed on both sides of a vehicle seat such as a vehicle, a ship, or an aircraft, and particularly relates to a side support that is rich in weight reduction and recyclability, and has a good fit and cushioning.

乗物用シートの例として、一般的に車両用シートのサイドサポートパッドはシートクッションパッドと同じ材質からなり、一般にウレタンフォームを用いていた。そして、サイドサポートは、着座者に左右方向の加速度が加えられた際、身体の位置を安定させるために、着座者の臀部が接するシートクッションよりも高くし土手形状を形成していた。 As an example of a vehicle seat, a side support pad of a vehicle seat is generally made of the same material as a seat cushion pad, and urethane foam is generally used. Then, the side support has a bank shape that is higher than the seat cushion with which the seated person's buttocks are in contact, in order to stabilize the body position when lateral acceleration is applied to the seated person.

また、着座者の左右方向の揺れを抑制するために、特許文献１には、着座者が直接に接触する接触部とこの接触部の両側に配置されて着座者の姿勢を保持する隆起部とを発泡成形により一体化してなる自動車用シートクッションパッドであって、上記両側隆起部のうち、それらの外側に内側部分及び接触部よりも発泡体硬度が高い部分が形成されている自動車用シートクッションパッドが開示されている。 In addition, in order to suppress the swinging of the seated person in the left-right direction, Patent Document 1 discloses a contact part in which the seated person directly contacts and a raised part that is disposed on both sides of the contact part and holds the seated person's posture. A seat cushion pad for automobiles, in which foam foam molding is integrated, and among the raised parts on both sides, a seat cushion part having higher foam hardness than the inner part and the contact part is formed on the outside thereof A pad is disclosed.

特開２００１−２５４１７号公報JP 2001-25417 A

従来の一般的なシートクッションではサイドサポートパッドも含めてクッション材としてウレタンフォームが使用されており、クッション性が極めて高く快適性に優れているため今もなお、多用されている。しかし、該ウレタンフォームはリサイクル性能に劣るという問題があった。さらに、シートクッションは一般的なクッション性の他に、自動車の運動に伴い乗員に加えられる前後左右の加速度に対し、乗員の身体を最適な位置で支える機能も求められる。長時間の乗車時の疲労を軽減するためにも最適な位置で身体を支える必要がある。このため非常に軽量で軟質なウレタンフォームのみでは機能を満足することができず、ある程度の剛性を得るためにはウレタンフォームの密度を一定以上の密度とする必要があり、このため軽量化が進まないという問題があった。 In conventional general seat cushions, urethane foam is used as a cushioning material including side support pads, and the cushioning properties are extremely high and the comfort is excellent. However, the urethane foam has a problem that it is inferior in recycling performance. Furthermore, the seat cushion is required to have a function of supporting the occupant's body at an optimum position against the longitudinal and lateral acceleration applied to the occupant as the automobile moves, in addition to the general cushioning property. It is necessary to support the body in an optimal position to reduce fatigue when riding for a long time. For this reason, the function cannot be satisfied with only a very lightweight and flexible urethane foam, and in order to obtain a certain degree of rigidity, the density of the urethane foam needs to be a certain level or more. There was no problem.

特許文献１に記載の技術も、特許文献１の段落［００１９］に主成分としてウレタンフォームとの記載があり、段落［００１２］に２種類の硬度の記載があるが、その材質はシートクッションパッドとサイドサポートパッドとが同じで硬度が異なることが示唆されている。そして、図１、図３及び図６に示すように、ウレタンフォームがサイドサポート内部に充填されている形態であるので、軽量化が進まないという問題があった。 The technology described in Patent Document 1 also includes a description of urethane foam as a main component in paragraph [0019] of Patent Document 1 and two types of hardness in paragraph [0012], but the material is a seat cushion pad. It is suggested that the side support pad is the same and the hardness is different. And as shown in FIG.1, FIG3 and FIG.6, since it was the form with which the urethane foam was filled inside the side support, there existed a problem that weight reduction did not advance.

そこで、本発明の目的は、乗物のシートに着座中の乗員に、乗物の運動によって加えられる横方向の加速に対し乗員の身体を支え、定位置に留めることができ、クッション性に富み、軽量化を実現でき、リサイクル性に富むサイドサポートを提供することである。 Therefore, the object of the present invention is to support the occupant's body against the lateral acceleration applied by the movement of the vehicle to the occupant seated on the vehicle seat, and can be held in a fixed position. To provide side support that is highly recyclable.

本発明において、合成樹脂発泡体とは、柔軟で曲げ変形が可能であり、かつ復元性に優れたものであり、ＪＩＳＫ７２２１−２：２００６記載の方法（２３℃±２℃、相対湿度５０±５％の雰囲気下でスキンを取り除いた長さ３５０ｍｍ
、幅１００ｍｍ、厚さ２５ｍｍの試験片を支点間距離３００ｍｍ、試験速度２０±１ｍｍ／ｍｉｎで撓みが最大９０ｍｍとなるまで荷重を加え、荷重撓み曲線を記録する。）に準じて測定した曲げ撓みが２０ｍｍ以上、かつ２０ｍｍ撓み時の荷重が２〜１００Ｎの合成樹脂発泡成形体を指す。具体的には発泡ポリプロピレン、発泡ポリエチレン、その他ポリオレフィン系樹脂発泡体、あるいは改質ポリスチレン系樹脂発泡体などを指す。前記合成樹脂発泡体には、ビーズ発泡成形体が含まれ、ビーズ発泡成形体としては、ポリプロピレン系ビーズ発泡成形体、ポリエチレン系ビーズ発泡体などがあげられる。 In the present invention, the synthetic resin foam is flexible and capable of bending deformation and is excellent in resilience. The method described in JIS K7221-2: 2006 (23 ° C. ± 2 ° C., relative humidity 50 ± 350mm long with skin removed in 5% atmosphere
A load is applied to a test piece having a width of 100 mm and a thickness of 25 mm at a fulcrum distance of 300 mm and a test speed of 20 ± 1 mm / min until the maximum deflection is 90 mm, and a load deflection curve is recorded. ) Refers to a synthetic resin foam molded article having a bending deflection of 20 mm or more and a load of 2 to 100 N when bent by 20 mm. Specifically, it refers to foamed polypropylene, foamed polyethylene, other polyolefin resin foams, modified polystyrene resin foams, and the like. The synthetic resin foam includes a bead foam molded body, and examples of the bead foam molded body include a polypropylene-based bead foam molded body and a polyethylene-based bead foam.

材料の具体的選定にあたっては、更に長さ４００ｍｍ程度の棒状又は板状の試験片の両端を支持し、中央を２５ｍｍ前後押し下げ３０分間保持し、その後荷重を解放した直後にサンプルの変形からの回復が９０％以上あることが望ましい。あるいは従来のウレタンフォーム製のシートクッションで行なわれていた試験に準じ、両端を支持したサンプルの中央部を所定回数繰り返し押し下げ変形させ、その後に測定された残留歪み（残留変位量ともいう。）が所定量以下であることが望ましい。 In the specific selection of materials, both ends of a bar-like or plate-like test piece having a length of about 400 mm are supported, the center is pushed back and forth about 25 mm and held for 30 minutes, and then the sample is recovered from deformation immediately after releasing the load. Is desirably 90% or more. Alternatively, in accordance with a test performed on a conventional urethane foam seat cushion, the center portion of the sample supporting both ends is repeatedly pressed down and deformed a predetermined number of times, and the residual strain (also referred to as residual displacement) measured thereafter is measured. It is desirable that the amount is not more than a predetermined amount.

このような条件を満たす材料として、例えば発泡ポリプロピレンの密度０．０６ｇ／ｃｍ^３〜０．０１５ｇ／ｃｍ^３、より好ましくは密度０．０３５ｇ／ｃｍ^３〜０．０１５ｇ／ｃｍ^３、または発泡ポリエチレンの密度０．０８ｇ／ｃｍ^３〜０．０３ｇ／ｃｍ^３などが好ましい。一方、柔軟性に乏しく曲げ変形により容易に破断の恐れがある硬質発泡ウレタンや発泡ポリスチレンなどは好ましくない。 Such materials satisfying, for example, the density of the foamed polypropylene ^{^{0.06g / cm 3 ~0.015g / cm 3}} , more preferably a density 0.035g ^/ cm ³ ~0.015g ^/ cm 3 or polyethylene foam, such as density 0.08g ^/ cm ³ ~0.03g ^/ cm 3 are preferred. On the other hand, rigid foamed urethane, polystyrene foam and the like which are poor in flexibility and can be easily broken by bending deformation are not preferable.

発明者らは軽量化を図るために材料の検討を進めた。連続気泡構造であるウレタンフォームに変わりうる素材の例として、一般に独立気泡構造を持つ合成樹脂発泡体は、従来からシートクッションのクッション材として一般に用いられてきたウレタンフォームに比し、軽量で剛性に富みリサイクルも容易である等の利点を持っていたが、圧縮方向での撓み、復元力をクッションとして使用する場合、内包する空気の反発力により発泡体の変形に伴い反力が急激に高まる傾向にあるため、クッション性に欠け硬く感じられ快適性に劣っていた。 The inventors have studied materials in order to reduce the weight. As an example of a material that can be changed to urethane foam with an open-cell structure, synthetic resin foam that has a closed-cell structure is generally lighter and more rigid than urethane foam that has been generally used as a cushioning material for seat cushions. It has the advantage that it is rich and easy to recycle, but when using a cushion in the direction of compression and restoring force, the reaction force tends to increase rapidly with the deformation of the foam due to the repulsive force of the encapsulated air Therefore, it was felt that the cushioning property was lacking and the comfort was inferior.

また一般に独立気泡構造を持つ合成樹脂発泡体は、ウレタンフォームと同様、圧縮方向に撓ませクッション材として使用する場合、長期間の使用に従い徐々に回復力を失いクリープが発生する。これは気泡を構成する樹脂皮膜の繰り返し変形による疲労と内包する空気の圧力低下によるところが大きい。従って長期間使用される自動車用シートバックの素材としては好ましいものではなかった。 In general, when a synthetic resin foam having a closed cell structure is used as a cushioning material by being bent in the compression direction like a urethane foam, it gradually loses its recovery force and generates creep as it is used for a long period of time. This is largely due to fatigue due to repeated deformation of the resin film constituting the bubbles and a drop in the pressure of the air contained therein. Therefore, it is not preferable as a material for an automobile seat back used for a long time.

そこで、発明者らは合成樹脂発泡体の物性を様々な角度から分析することにより、従来の一般的なクッション材として使用されてきた圧縮方向に撓ませる構造ではなく、曲げ変形が可能で復元性に優れた合成樹脂発泡体からなる支持部の曲げ変形とその回復性をクッション材として利用する方法が最適であることを見出し本発明に至った。 Therefore, the inventors analyzed the physical properties of the synthetic resin foam from various angles, so that it is not a structure that has been bent in the compression direction that has been used as a conventional general cushioning material, but can be bent and deformed. The present inventors have found that the method of utilizing the bending deformation of a support portion made of a synthetic resin foam excellent in the above and its recoverability as a cushioning material is optimal.

「発明が解決しようとする課題」に記載した課題を解決するために、請求項１に記載のサイドサポート４の発明は、乗物用シート１の両側に配設されるサイドサポート４において、ＪＩＳＫ７２２１−２：２００６記載の方法に準じて測定した曲げ撓み量が２０ｍｍ以上、かつ２０ｍｍ撓み時の押圧が２〜１００Ｎの合成樹脂発泡体からなるサイドサポートパッド５を備え、前記サイドサポートパッド５の構造が、前記サイドサポートパッド５の長手方向で離隔した両端近傍の２か所に支持部６を設け、細長の筒状体１０の下方に開口部が長手方向に沿って形成され、前記支持部６間における短手方向の断面形状が、下方が開いたＵ字状、Ｃ字状又はＬ字状の断面形状を有する筒状体１０からなる。 In order to solve the problem described in “Problems to be Solved by the Invention”, the invention of the side support 4 according to claim 1 is based on JIS K7221-2 in the side support 4 disposed on both sides of the vehicle seat 1. : A side support pad 5 made of a synthetic resin foam having a bending deflection amount measured in accordance with the method described in 2006 of 20 mm or more and a pressing force at the time of 20 mm deflection of 2 to 100 N, and the structure of the side support pad 5 is the side support Support portions 6 are provided at two locations in the vicinity of both ends separated in the longitudinal direction of the pad 5, an opening is formed along the longitudinal direction below the elongated cylindrical body 10, and the short direction between the support portions 6 Is formed of a cylindrical body 10 having a U-shaped, C-shaped or L-shaped cross-sectional shape with an open bottom.

請求項２に記載のサイドサポート４の発明は、請求項１において、前記サイドサポートパッド５の筒状体１０の側方１２に、前記下方が開いたＵ字状、Ｃ字状又はＬ字状の断面形状の側方の下端から上方近傍までの上下方向のスリット２０を設けたことを特徴とする。 The invention of the side support 4 according to claim 2 is the U-shaped, C-shaped or L-shaped cross section in which the lower side is open on the side 12 of the cylindrical body 10 of the side support pad 5 in claim 1. A vertical slit 20 is provided from the lower side of the shape to the vicinity of the upper side.

請求項３に記載のサイドサポート４の発明は、請求項１又は２において、前記サイドサポートパッド５の長手方向における両端に配設した支持部６のサイドサポートパッド５側でない他端側の取付形態が、支持部６の他端を完全にフレームに固定してしまう形態、支持部６の他端の片方又は両方がフレーム上で荷重方向に対して垂直方向に滑動可能な形態、又は、支持部６の他端の片方又は両方に荷重による負荷で変形したサイドサポートパッドを無負荷時の状態に戻す方向に付勢力を与える弾性体２２を接続させて支持部の他端を弾設させる形態であることを特徴とする。 The invention of the side support 4 according to claim 3 is the support according to claim 1 or 2, wherein the mounting form on the other end side other than the side support pad 5 side of the support portion 6 disposed at both ends in the longitudinal direction of the side support pad 5 is supported. A form in which the other end of the part 6 is completely fixed to the frame, a form in which one or both of the other ends of the support part 6 is slidable in the direction perpendicular to the load direction on the frame, or other parts of the support part 6 It is a form in which the other end of the support portion is elastically connected by connecting an elastic body 22 that applies a biasing force in a direction to return the side support pad deformed by a load due to a load to one or both ends to a state of no load. And

請求項４に記載のサイドサポート４の発明は、請求項１乃至３のいずれかにおいて、前記サイドサポートパッド５の筒状体１０の上方１１の裏面側に、荷重による負荷で変形したサイドサポートパッド５を無負荷時の状態に戻す方向に付勢力を与える弾性体２３を配設したことを特徴とする。 According to a fourth aspect of the present invention, the side support pad 5 according to any one of the first to third aspects is provided with no side support pad 5 deformed by a load caused by a load on the upper surface 11 of the cylindrical body 10 of the side support pad 5. An elastic body 23 that applies a biasing force in a direction to return to a loaded state is provided.

請求項５に記載のサイドサポート４の発明は、請求項１乃至４のいずれかにおいて、前記筒状体の内部に、緩衝体を配設したことを特徴とする。 The invention of the side support 4 according to claim 5 is characterized in that, in any one of claims 1 to 4, a buffer is disposed inside the cylindrical body.

請求項１に記載のサイドサポート４の発明は、いずれも従来一般的に使用されていたウレタンフォームを合成樹脂発泡体に置換することが可能なものであり、そのため軽量化、リサイクル性の向上が可能となるものである。また、比較的硬質でありクッション性、フィット性、耐クリープ性に劣っていた合成樹脂発泡体を使用するにもかかわらず、高いクッション性、フィット性を付与させることが可能であり、設計の自由度が高く乗員の身体を適切に支持し高い快適性を得ることができ、長期間の使用によっても従来のすべてをウレタンフォームからなるシートクッションパッドと同等の良好な耐クリープ性を発揮するため高い商品性を有するという効果を奏する。 The invention of the side support 4 according to claim 1 can replace the urethane foam generally used in the past with a synthetic resin foam, and thus can be reduced in weight and improved in recyclability. It will be. Despite the use of synthetic resin foam, which is relatively hard and inferior to cushioning, fit, and creep resistance, it is possible to give high cushioning and fit, and freedom of design Highly capable of supporting the passenger's body properly and obtaining high comfort, and even with long-term use, it exhibits high creep resistance equivalent to that of seat cushion pads made of urethane foam. There is an effect of having merchantability.

さらに、乗員の乗車、降車の際、身体を斜めにした状態でシートクッションの側方に設けられたサイドサポート上に一旦着座したときに、サイドサポートパッドの硬さで不快感を覚えることなく、クッション性を感じることができる。 Furthermore, when passengers get on and off the vehicle, when they sit down on the side support provided on the side of the seat cushion with the body tilted, they do not feel uncomfortable due to the hardness of the side support pad. Can feel.

そして、ウレタンフォームで形成した一般的なサイドサポートパッドの形態又は特許文献１に示すようなサイドサポートパッドの形態では、サイドサポートパッドの材質が一般の合成樹脂発泡体である場合には、繰り返し荷重を受けることによって永久変形が生ずるが、本発明のサイドサポートでは繰り返し荷重を受けても曲げ変形することでクッション性を発揮し、その変形率を一定以下に保つことで永久変形が生じないという効果を奏する。また、ウレタンフォームで形成した一般的なサイドサポートパッドの形態に比較して、本発明のサイドサポート４は、剛性を有するが軽量の合成樹脂発泡体を使用し内部９を空洞にしているので軽量化が実現できるという効果を奏する。 And in the form of the general side support pad formed with urethane foam or the form of the side support pad as shown in Patent Document 1, when the material of the side support pad is a general synthetic resin foam, it receives a repeated load. However, the side support of the present invention exhibits the effect of exhibiting cushioning properties by bending deformation even under repeated load, and maintaining the deformation rate below a certain value. In addition, compared with a general side support pad formed of urethane foam, the side support 4 according to the present invention has a rigid but lightweight synthetic resin foam and has a hollow interior 9 so that the weight can be reduced. There is an effect that it can be realized.

請求項２に記載の発明は、請求項１に記載の発明と同じ効果を奏するとともに、乗員に加わる横方向の加速度が大であるスポーツ車などで、さらに確実に乗員の身体を支持するため、サイドサポート４の高さを高く設定する場合であっても、合成樹脂発泡体からなるサイドサポート４の変形を容易にしクッション性を維持しつつ横方向の剛性を保つことができる。 The invention described in claim 2 has the same effect as that of the invention described in claim 1, and further supports the occupant's body more reliably in a sports car or the like in which the lateral acceleration applied to the occupant is large. Even when the height of the side support 4 is set high, the side support 4 made of a synthetic resin foam can be easily deformed, and the lateral rigidity can be maintained while maintaining cushioning properties.

請求項３に記載の発明は、請求項１又は２に記載の発明と同じ効果を奏するとともに、さらに支持部６をフレーム３０に固定してしまう形態の場合にはサイドサポートパッド５の曲げ変形によってやや硬めのクッション性を実現したい場合に適し、支持部６をフレーム３０上で荷重方向に対して垂直方向に滑動可能な形態の場合にはサイドサポートパッド５への荷重方向の力による曲げ変形と支持部６への荷重方向に対して垂直方向の力による変形で柔らかめのクッション性を実現したい場合に適し、支持部６を無負荷時の状態に戻す方向に付勢力を与える弾性体２２を接続させて支持部６の他端を弾設させる形態の場合には荷重に対する反力を有するようにしレスポンス性を高めたいクッション性にしたい場合に適するという効果を奏する。 The invention described in claim 3 has the same effect as that of the invention described in claim 1 or 2, and in the case where the support portion 6 is fixed to the frame 30, the side support pad 5 is slightly bent and deformed. It is suitable for the case where it is desired to achieve a harder cushioning property, and when the support portion 6 is slidable in the direction perpendicular to the load direction on the frame 30, bending deformation due to the force in the load direction on the side support pad 5 and the support portion This is suitable when soft cushioning is desired by deformation by force in the direction perpendicular to the load direction to the load 6, and an elastic body 22 that applies a biasing force in a direction to return the support portion 6 to the unloaded state is connected. In the case of the configuration in which the other end of the support portion 6 is elastically provided, there is an effect that it is suitable for the case where it is desired to have a cushioning property that has a reaction force against the load and wants to improve the response.

請求項４に記載の発明は、請求項１乃至３のいずれかに記載の発明と同じ効果を奏するとともに、さらにサイドサポートパッド５を無負荷時の状態に戻す方向に付勢力を与える弾性体２３を設けたのでさらにクッション性が高まるという効果を奏する。 The invention according to claim 4 has the same effect as the invention according to any one of claims 1 to 3, and further includes an elastic body 23 that applies a biasing force in a direction to return the side support pad 5 to the unloaded state. Since it is provided, the cushioning property is further enhanced.

請求項５に記載の発明は、請求項１乃至４のいずれかに記載の発明と同じ効果を奏するとともに、さらに筒状体１０の曲げ変形する領域に、着座者の荷重による筒状体１０の曲げ変形時の衝撃に対して減衰性を発揮する弾性体１９を配設することによって、筒状体１０に生ずる曲げ変形を減衰させることができ、クッション性を高めることができる。また、筒状体１０に対する、例えば子供の飛び跳ねや重量物の衝突により生ずる衝撃に対する耐久性を向上させることができる。 The invention according to claim 5 has the same effect as the invention according to any one of claims 1 to 4, and further, the tubular body 10 is subjected to bending deformation of the tubular body 10 due to the load of the seated person. By disposing the elastic body 19 that exhibits a damping property against an impact at the time of bending deformation, bending deformation generated in the tubular body 10 can be attenuated, and cushioning properties can be enhanced. Further, durability against an impact caused by, for example, jumping of a child or collision of a heavy object with respect to the cylindrical body 10 can be improved.

表皮を装着している乗物用シートの例としての車両用シートの概要図である。It is a schematic diagram of a vehicle seat as an example of a vehicle seat fitted with a skin. 表皮を取り除いた本発明のサイドサポートパッド部の側面視の図で、（ａ）が図１におけるＡ矢視からみた図であり、（ｂ）が図１におけるＢ−Ｂ断面図である。It is the figure of the side view of the side support pad part of this invention which removed the epidermis, (a) is the figure seen from the A arrow in FIG. 1, (b) is BB sectional drawing in FIG. 図２（ａ）におけるＣ−Ｃ断面図で、（ａ）が逆Ｕ字形の図で、（ｂ）が略Ｌ字形の図である。It is CC sectional drawing in Fig.2 (a), (a) is a figure of an inverted U shape, (b) is a figure of a substantially L shape. サイドサポートパッドに荷重がかかったときのサイドサポートパッドの曲げ変形の説明図で、（ａ）が無負荷時、（ｂ）が負荷時を示す図であるIt is explanatory drawing of the bending deformation of the side support pad when a load is applied to the side support pad, and (a) shows no load and (b) shows a load. サイドサポートパッドに荷重がかかったときのサイドサポートパッドの曲げ変形の説明図で、（ａ）が上方からの荷重の場合、（ｂ）が斜め上からの荷重の場合の図である。It is explanatory drawing of the bending deformation of a side support pad when a load is applied to the side support pad, and (a) is a diagram in the case of a load from above, and (b) is a diagram in the case of a load from diagonally above. 本発明のサイドサポートの他の形態を示す図で、（ａ）が側面視の図で、（ｂ）が支持部がサイドサポートパッドの孔に嵌設された形態を示す断面図で、（ｃ）が支持部がサイドサポートパッドの内壁に接して配設された形態を示す断面図である。It is a figure which shows the other form of the side support of this invention, (a) is a figure of side view, (b) is sectional drawing which shows the form by which the support part was fitted by the hole of the side support pad, (c) is It is sectional drawing which shows the form by which the support part was arrange | positioned in contact with the inner wall of a side support pad. 本発明のサイドサポートの他の形態を示す図であり、サイドサポートパッドの両端部が延出して支持部の孔に嵌挿された形態を示す図で、（ａ）が側面視の図で、（ｂ）が長手方向で切断した断面図である。It is a figure which shows the other form of the side support of this invention, It is a figure which shows the form which the both ends of the side support pad extended, and was inserted by the hole of a support part, (a) is a figure of a side view, (b ) Is a cross-sectional view cut in the longitudinal direction. スリットを設けたサイドサポートの形態を示す図で、（ａ）が側面視の図で、（ｂ）が長手方向で切断した断面図である。It is a figure which shows the form of the side support which provided the slit, (a) is a figure of a side view, (b) is sectional drawing cut | disconnected in the longitudinal direction. 図８における断面図で、（ａ）がスリットが形成されてない位置のＤ−Ｄ断面図で、（ｂ）がスリットが形成された位置のＥ−Ｅ断面図である。FIGS. 9A and 8B are cross-sectional views taken along line DD in a position where a slit is not formed, and FIG. 9B is a cross-sectional view taken along a line E-E at a position where a slit is formed. スリットを設けたサイドサポートの形態に、サイドサポートパッドを無負荷状態に戻す方向に付勢された弾性体を設けた、長手方向で切断した断面の説明図である。It is explanatory drawing of the cross section cut | disconnected in the longitudinal direction which provided the elastic body urged | biased in the direction which returns a side support pad to a no-load state in the form of the side support which provided the slit. 図１０における断面図で、（ａ）がスリットが設けられてない部位のＦ−Ｆ断面図で、（ｂ）がスリットが設けられた部位のＧ−Ｇ断面図で、（ｃ）がサイドサポートパッドを無負荷状態に戻す方向に付勢された弾性体を設けた部位のＨ−Ｈ断面図である。FIG. 10 is a cross-sectional view of FIG. 10, where (a) is an FF cross-sectional view of a portion where no slit is provided, (b) is a GG cross-sectional view of a portion where a slit is provided, and (c) is a side support pad. It is HH sectional drawing of the site | part which provided the elastic body urged | biased in the direction which returns to a no-load state. 支持部の取付形態がフレームに固定されている形態を示す図で、（ａ）が外観図で、（ｂ）が（ａ）のＫ矢視図である。It is a figure which shows the form by which the attachment form of the support part is being fixed to the flame | frame, (a) is an external view, (b) is a K arrow line view of (a). 支持部の取付形態がフレーム上を滑動する形態を示す図で、（ａ）が外観図で、（ｂ）が（ａ）のＬ矢視図である。It is a figure which shows the form which the attachment form of a support part slides on a flame | frame, (a) is an external view, (b) is a L arrow line view of (a). 図２（ｂ）の筒状体の内部に緩衝体を充填するように配設させた図である。It is the figure arrange | positioned so that the buffer body may be filled inside the cylindrical body of FIG.2 (b).

以下、本発明にかかるサイドサポート４の実施形態について説明する。 Hereinafter, embodiments of the side support 4 according to the present invention will be described.

本発明にかかるサイドサポート４は、図１に示す車両用シートのシートクッションやシートバックの左右の両側に配設されたり、船舶のシートや航空機シートに配設される。本発明のサイドサポート４は、図１又は図２に示すように、乗物用シート１の両側に配設されるサイドサポート４において、ＪＩＳＫ７２２１−２：２００６記載の方法に準じて測定した曲げ撓み量が２０ｍｍ以上、かつ２０ｍｍ撓み時の押圧が２〜１００Ｎの合成樹脂発泡体からなるサイドサポートパッド５を備え、前記サイドサポートパッド５の構造が、前記サイドサポートパッド５の長手方向で離隔した両端近傍の２か所に支持部６を設け、細長の筒状体１０の下方に開口部が長手方向に沿って形成され、前記支持部６間における短手方向の断面形状が、下方が開いた形状であるＵ字状、Ｃ字状又はＬ字状の断面形状を有する筒状体１０からなる。前記短手方向の断面形状としては、例えば図３（ａ）に示すような略逆Ｕ字形、略Ｃ字形、又は図３（ｂ）に示すような略Ｌ字形がある。そして、支持部６の一端側と長手方向の部位との接続は固定されるが、支持部６の他端側の取付形態は、図１２に示すように支持部６の他端を完全にフレーム３０部分と固定してしまう形態、図１３に示すように支持部６の他端の片方又は両方がフレーム３０上で滑動可能な形態、又は、図１０に示すように支持部６の他端にバネのような付勢力を有する弾性体２２を接続させて支持部６の他端を弾設させた形態がある。 The side support 4 according to the present invention is disposed on the left and right sides of the seat cushion and seat back of the vehicle seat shown in FIG. 1, or is disposed on a ship seat and an aircraft seat. As shown in FIG. 1 or FIG. 2, the side support 4 of the present invention has an amount of bending deflection measured according to the method described in JIS K7221-2: 2006 on the side support 4 disposed on both sides of the vehicle seat 1. The side support pad 5 includes a side support pad 5 made of a synthetic resin foam having a pressure of 20 mm or more and a pressure of 2 to 100 N when bent, and the structure of the side support pad 5 has two locations in the vicinity of both ends separated in the longitudinal direction of the side support pad 5. A support portion 6 is provided, an opening is formed below the elongated cylindrical body 10 along the longitudinal direction, and the cross-sectional shape in the short direction between the support portions 6 is a U shape in which the lower portion is open. And a cylindrical body 10 having a C-shaped or L-shaped cross-sectional shape. Examples of the cross-sectional shape in the short direction include a substantially inverted U shape, a substantially C shape as shown in FIG. 3A, and a substantially L shape as shown in FIG. The connection between the one end side of the support portion 6 and the longitudinal portion is fixed, but the mounting form on the other end side of the support portion 6 is completely framed with the other end of the support portion 6 as shown in FIG. 30 in a fixed form, one or both of the other ends of the support portion 6 can be slid on the frame 30 as shown in FIG. 13, or the other end of the support portion 6 as shown in FIG. There is a form in which an elastic body 22 having a biasing force such as a spring is connected and the other end of the support portion 6 is elastically provided.

サイドサポート４には、図２（ａ）、（ｂ）に示すように長手方向における両端近傍を支持部６とし、図３（ａ）に示すように略逆Ｕ字形、略Ｃ字形又は略Ｌ字形、あるいは、図３（ｂ）に示すように略Ｌ字形の断面形状の上方１１と側方１２からなる略筒状体１０のサイドサポートパッド５を備える形態、又は、図８に示すように、長手方向における両端近傍を支持部６とし、略逆Ｕ字形、略Ｃ字形又は略Ｌ字形の上方１１側と側方１２側からなる略筒状体１０の側方１２に、前記下方が開いたＵ字状、Ｃ字状又はＬ字状の断面形状の側方１２の下端から上方近傍までの上下方向のスリット２０を設けたサイドサポートパッド５を備える形態がある。 As shown in FIGS. 2A and 2B, the side support 4 has support portions 6 in the vicinity of both ends in the longitudinal direction, and as shown in FIG. 3A, a substantially inverted U shape, a substantially C shape, or a substantially L shape. Alternatively, as shown in FIG. 3 (b), a configuration including a side support pad 5 of a substantially cylindrical body 10 composed of an upper part 11 and a side part 12 having a substantially L-shaped cross section, or a longitudinal direction as shown in FIG. The vicinity of both ends in the direction is the support portion 6, and the lower portion is opened to the side 12 of the substantially cylindrical body 10 composed of the upper 11 side and the side 12 side of the substantially inverted U shape, C shape or L shape. There exists a form provided with the side support pad 5 which provided the slit 20 of the up-down direction from the lower end of the side 12 of the cross-sectional shape of character shape, C shape, or L shape to upper vicinity.

図２乃至図１１に示すいずれの形態であっても筒状体１０の長手方向で離隔して設けられた両端近傍の２か所を曲げ変形の支点とし、支持部６間の側方１２の底辺は固定されていない。該支点に支持部６を設け、前記支持部６間の内部９は、図２（ｂ）に示すように空洞の形態であっても、前記内部部９の空洞の一部に緩衝体１９が配設された形態であっても、又は図１４に示すように前記内部９の空洞に緩衝体１９をすべて充填するように配設する形態であってもよい。 In any of the forms shown in FIG. 2 to FIG. 11, two locations near both ends provided apart from each other in the longitudinal direction of the cylindrical body 10 serve as fulcrums for bending deformation, and the side 12 between the support portions 6 The base is not fixed. A support portion 6 is provided at the fulcrum. Even if the interior 9 between the support portions 6 is in the form of a cavity as shown in FIG. 2B, a buffer 19 is provided in a part of the cavity of the interior portion 9. It may be a form in which it is arranged, or a form in which it is arranged so as to fill all the cushioning bodies 19 in the cavity of the inside 9 as shown in FIG.

これによって、上方１１の面に荷重Ｐａが負荷されると、筒状体１０が両端近傍の支持部６を支点として中央部が曲げ変形する。この曲げ変形によって剛性を有する材質でありながらクッション性を有することができる。 As a result, when the load Pa is applied to the upper 11 surface, the central portion of the cylindrical body 10 is bent and deformed with the support portions 6 in the vicinity of both ends as fulcrums. Although it is a material having rigidity by this bending deformation, it can have cushioning properties.

筒状体１０の曲げ変形について図４及び図５（ａ）で説明する。図４に示す無負荷時の状態から、例えば着座者の着座時に上方から荷重Ｐａが負荷されると、図４又は図５（ａ）に示すように、筒状体１０の上方１１の端が高さｈ１から下降し、側方１２が拡がりながら、下方の端１３が高さｈ２から下降して、筒状体１０が曲げ変形する。 The bending deformation of the cylindrical body 10 will be described with reference to FIGS. 4 and 5A. When the load Pa is applied from above, for example, when a seated person is seated from the no-load state shown in FIG. 4, the upper end 11 of the tubular body 10 is moved as shown in FIG. 4 or FIG. The lower end 13 is lowered from the height h2 while the side body 12 is expanded from the height h1, and the cylindrical body 10 is bent and deformed.

また、着座者が乗降するときに臀部がサイドサポート４の側方１２に当たり横方向からの荷重Ｐｂが負荷されたときに、側方１２が撓むのでクッション性を有する。この場合の筒状体１０の変形について図５（ｂ）で説明する。横方向からの荷重Ｐｂが負荷されると、上方１１と側方１２との境付近の部位ｋが撓みクッション性を発現する。 Further, when the occupant gets on and off, when the buttock hits the side 12 of the side support 4 and a load Pb from the lateral direction is applied, the side 12 bends and thus has cushioning properties. The deformation of the cylindrical body 10 in this case will be described with reference to FIG. When the load Pb from the lateral direction is applied, the portion k near the boundary between the upper portion 11 and the side portion 12 bends and develops cushioning properties.

サイドサポートパッド５である略筒状体１０の支持部６の形態は、図２（ｂ）に示すように接着剤やボルトナット等の締結手段を用いた固設型の形態、図６（ｂ）に示すように筒状体１０側に凸状型支持部６を嵌め込む形態、図６（ｃ）に示すように筒状体１０に内側に密着させて凸状型支持部６を設ける形態、又は、図７（ｂ）に示すように筒状体１０を支持部６に形成された穴に嵌め込む形態がある。いずれの形態であっても、サイドサポートパッド５である略筒状体１０の長手方向の両端近傍に設けた支点を固定化できる形態であればよい。 As shown in FIG. 2B, the support portion 6 of the substantially cylindrical body 10 that is the side support pad 5 has a fixed-type configuration using a fastening means such as an adhesive or a bolt and nut, as shown in FIG. As shown in FIG. 6, a configuration in which the convex mold support portion 6 is fitted on the cylindrical body 10 side, a configuration in which the convex mold support portion 6 is provided in close contact with the cylindrical body 10 as shown in FIG. 6C, Alternatively, as shown in FIG. 7 (b), there is a form in which the cylindrical body 10 is fitted into a hole formed in the support portion 6. Any form may be used as long as the fulcrum provided in the vicinity of both ends in the longitudinal direction of the substantially cylindrical body 10 that is the side support pad 5 can be fixed.

また、支持部６のサイドサポートパッド５側ではない他端側の取付形態は、第一に図１２に示すように、支持部６の他端が動かないように支持部６の他端を完全にフレーム３０部分に固定してしまう形態がある。この場合には、支持部６がフレーム３０に固定されているから、サイドサポートパッド５に荷重が負荷されたときには、支持部６を両端の支点として荷重方向にサイドサポートパッド５が曲げ変形する。 Further, the mounting form of the other end side of the support portion 6 other than the side support pad 5 side is as follows. First, as shown in FIG. 12, the other end of the support portion 6 is completely moved so that the other end of the support portion 6 does not move. There is a form that is fixed to the frame 30 portion. In this case, since the support portion 6 is fixed to the frame 30, when a load is applied to the side support pad 5, the side support pad 5 is bent and deformed in the load direction with the support portion 6 as fulcrums at both ends.

第二に図１３に示すように、２か所の支持部６の片方又は両方の他端が滑ることが可能なように、支持部６の他端の片方又は両方がフレーム３０上で滑動可能な形態がある。この場合には、図１３（ｂ）の一部断面図で示すように、支持部６が滑動体３２に嵌設されて固定され、該滑動体３２が滑動用ガイド３１に規制された溝を滑り、該滑動用ガイド３１はフレーム３０に固定される。これによって、サイドサポートパッド５に荷重が負荷されたときには、荷重はサイドサポートパッド５への荷重方向、及び、支持部６への荷重方向に対する垂直方向にかかるので、クッション性が高まる。 Second, as shown in FIG. 13, one or both of the other ends of the support 6 can slide on the frame 30 so that one or both of the other ends of the support 6 can slide. There are various forms. In this case, as shown in a partial cross-sectional view of FIG. 13B, the support portion 6 is fitted and fixed to the sliding body 32, and the sliding body 32 has a groove regulated by the sliding guide 31. The sliding guide 31 is fixed to the frame 30. Thereby, when a load is applied to the side support pad 5, the load is applied in the direction perpendicular to the load direction to the side support pad 5 and the load direction to the support portion 6, so that cushioning properties are enhanced.

第三に、図１０に示すように支持部６の他端の片方又は両方にバネのような付勢力を有する弾性体を接続させて支持部６の他端を弾設させる形態がある。図１０に示すように、支持部６の前後端の内の一端又は両端にサイドサポートパッド５を無負荷時の状態に戻す方向に付勢力を与える弾性体２２を配設することができ、上方１１の裏面側にサイドサポートパッド５を無負荷時の状態に戻す方向に付勢力を与える弾性体２３を配設することができる。 Third, as shown in FIG. 10, there is a form in which an elastic body having a biasing force such as a spring is connected to one or both of the other ends of the support portion 6 and the other end of the support portion 6 is elastically provided. As shown in FIG. 10, an elastic body 22 that applies a biasing force in a direction to return the side support pad 5 to the unloaded state can be disposed at one or both of the front and rear ends of the support portion 6. An elastic body 23 that applies an urging force in a direction to return the side support pad 5 to the unloaded state can be disposed on the back surface side.

いずれの弾性体２２、２３も、サイドサポートパッド５を無負荷時の状態に戻す方向に付勢力を与えるので、サイドサポートパッド５である略筒状体１０に荷重が負荷されたら、前記筒状体１０の長手方向の両端部間は曲げ変形して着座者の衝撃を和らげることができ、かつ衝撃を受けた後に原位置まで復元する力を強化することができる。 Since any of the elastic bodies 22 and 23 gives a biasing force in a direction to return the side support pad 5 to the unloaded state, when the load is applied to the substantially cylindrical body 10 that is the side support pad 5, the cylindrical body 10 Between both ends in the longitudinal direction can be bent and deformed to reduce the impact of the seated person, and the force to restore the original position after receiving the impact can be strengthened.

図１０における筒状体１０のスリット２０が存しない部位のＦ−Ｆ断面を図１１（ａ）に示し、筒状体１０のスリット２０が存する部位のＧ−Ｇ断面を図１１（ｂ）に示し、弾性体２３を配設した部位のＨ−Ｈ断面を図１１（ｃ）に示している。図１０や図１１に示すように、側面固定レール２１は筒状体に乗員によって加えられる横方向の荷重に対しサイドサポート４の剛性を発揮させるために配設している。側面固定レール２１と筒状体１０に対して弾性体２２、２３はそれぞれ両端を接するように設置されている。 FIG. 11 (a) shows the FF cross section of the cylindrical body 10 where the slit 20 does not exist, and FIG. 11 (b) shows the GG cross section of the cylindrical body 10 where the slit 20 exists. FIG. 11C shows a HH cross section of the portion where the elastic body 23 is disposed. As shown in FIGS. 10 and 11, the side surface fixing rail 21 is arranged to exert the rigidity of the side support 4 against a lateral load applied to the cylindrical body by the occupant. The elastic bodies 22 and 23 are installed so that both ends are in contact with the side surface fixing rail 21 and the cylindrical body 10.

次に、図８に示すように、側方１２の下端から上方１１近傍までのスリット２０を設けた形態の場合について説明する。スリット２０を設けた場合は、サイドサポート４の高さが一定以上あり断面剛性が高まるために、曲げ変形が生じにくく乗員のサイドサポート４上部への着座等によって下方向の荷重が加えられる場合に望ましいクッション性が得られなくなる現象を避けることができる。 Next, as shown in FIG. 8, the case where the slit 20 from the lower end of the side 12 to the vicinity of the upper part 11 is provided will be described. When the slit 20 is provided, the side support 4 has a certain height or more and the cross-sectional rigidity is increased. Therefore, the cushion is desirable when a downward load is applied due to seating of the occupant on the side support 4 and the like. It is possible to avoid the phenomenon that the property cannot be obtained.

図８における筒状体１０のスリット２０が存しない部位のＤ−Ｄ断面を図９（ａ）に示し、筒状体１０のスリット２０が存する部位のＥ−Ｅ断面を図９（ｂ）に示している。スリット２０が存する部位は上方１１のみが構成要素であるので曲げ変形しやすい。 FIG. 9A shows a DD cross section of the cylindrical body 10 where the slit 20 does not exist, and FIG. 9B shows a EE cross section of the cylindrical body 10 where the slit 20 exists. Show. Since only the upper part 11 is a component of the part where the slit 20 exists, it is easily bent and deformed.

次に、図１４に示すように、筒状体１０の曲げ変形により突出する側の内部９に緩衝体１９が充填するように配設されていて、筒状体１０が荷重を受けて曲げ変形すると緩衝体１９は押圧され縮小する。 Next, as shown in FIG. 14, the buffer body 19 is disposed so that the inside 9 on the side protruding by the bending deformation of the cylindrical body 10 is filled, and the cylindrical body 10 receives the load to bend and deform. Then, the buffer body 19 is pressed and contracted.

緩衝体１９が押圧され縮小することによって、筒状体１０に生ずる曲げ変形を減衰させることができ、クッション性を高めることができる。また、筒状体１０に対する、例えば子供の飛び跳ねや重量物の衝突により生ずる衝撃に対する耐久性を向上させることができる。 When the buffer body 19 is pressed and reduced, the bending deformation generated in the cylindrical body 10 can be attenuated, and the cushioning property can be improved. Further, durability against an impact caused by, for example, jumping of a child or collision of a heavy object with respect to the cylindrical body 10 can be improved.

緩衝体１９としては、ウレタンフォーム、発泡樹脂成形体、発泡樹脂の粒子、発泡ゴム、エストラマー、繊維状物、立体編物、ウール、絹、綿、三次元スプリング構造体等の繊維の接合物、気体を密封した伸縮可能な袋状体又は球状体等の、繰り返し荷重に対して復元性を有し、減衰性を有する材料、例えば繊維やゴムを使った構成物からなり、軟質発泡材料の硬さの求め方に関するＪＩＳＫ６４００−２：２０１２に規定された、直径２００ｍｍの平らな円盤の加圧板で２５％圧縮時（Ｄ法）の硬さが２０〜６００Ｎであるものをいう。２０Ｎ未満であれば柔らか過ぎて圧縮された後に元の形態に復帰しようとする反力が弱すぎて減衰性を有さない、６００Ｎ超であれば荷重が負荷されたときに硬すぎて圧縮変形をせず減衰性を有さない。 As the buffer body 19, urethane foam, foamed resin molding, foamed resin particles, foamed rubber, elastomer, fibrous material, three-dimensional knitted fabric, wool, silk, cotton, three-dimensional spring structure, etc., joined gas, gas It is made of a material that has resilience to repeated loads, such as a stretchable bag-like body or a spherical body that is sealed, and has a damping property such as fiber or rubber. The pressure plate of a flat disk with a diameter of 200 mm specified in JIS K6400-2: 2012 concerning the method of obtaining the above is a hardness of 20 to 600 N at 25% compression (D method). If it is less than 20N, it is too soft and the reaction force to return to its original form after being compressed is too weak to have damping. If it exceeds 600N, it is too hard when a load is applied and it is compressed and deformed. Does not have attenuating property.

また、緩衝体１９は、筒状体１０の上方１１側の面の曲げ変形により突出する側に配設され、前記筒状体１０に生ずる曲げ変形を減衰させクッション性を高めるものであるから、この緩衝体１９に入れ替えて又は追加して、筒状体１０の上方１１側の面の曲げ変形により突出する側に接して又は離隔して、金属板ばね、金属線状ばね、Ｓばね、コイルばね、ゴム、弾性を有する樹脂体、ポリエステル等の合成繊維を高密度に紡織したもの等の弾性を有する物を配設してもよい。また、筒状体１０の上方１１側の面の撓み時に伸縮する側の面に、両端又は全面に不織布などを貼り付けてもよい。 In addition, the buffer body 19 is disposed on the protruding side due to the bending deformation of the surface on the upper 11 side of the cylindrical body 10, and attenuates the bending deformation generated in the cylindrical body 10 to enhance the cushioning property. The metal plate spring, the metal linear spring, the S spring, and the coil are replaced with or added to the buffer body 19 to be in contact with or separated from the protruding side by bending deformation of the upper 11 side surface of the cylindrical body 10. An elastic material such as a spring, rubber, a resin body having elasticity, or a synthetic fiber such as polyester woven at high density may be disposed. Moreover, you may affix a nonwoven fabric etc. to the both ends or the whole surface to the surface of the side which expands-contracts when the surface of the upper side 11 side of the cylindrical body 10 is bent.

次に、合成樹脂発泡体について説明する。本発明における合成樹脂発泡体は、柔軟で曲げ変形が可能であり、かつ復元性に優れたものであり、ＪＩＳＫ７２２１−２：２００６記載の方法（２３℃±２℃、相対湿度５０±５％の雰囲気下でスキンを取り除いた長さ３５０ｍｍ、幅１００ｍｍ、厚さ２５ｍｍの試験片を支点間距離３００ｍｍ、試験速度２０±１ｍｍ／ｍｉｎで最大９０ｍｍまで荷重を加え、荷重撓み曲線を記録する。）に準じて測定した曲げ撓みが２０ｍｍ以上、かつ２０ｍｍ撓み時の荷重が２〜１００Ｎの合成樹脂発泡成形体を指す。曲げ撓みが２０ｍｍ未満で破壊を生じるような合成樹脂発泡成形体は、耐久性面から不適である。身体による押圧を支えるため必要となる支持部３の断面が非常に大きくなり、２０ｍｍ撓み時の荷重が、２Ｎ未満又は１００Ｎ超の場合、乗員によって加えられる荷重によって好ましい撓み量を発生させることが困難となり、ともに好ましい設計が困難となる。具体的には発泡ポリプロピレン、発泡ポリエチレン、その他ポリオレフィン系樹脂発泡体、あるいは改質ポリスチレン系樹脂発泡体などを指す。なお、上記発泡体の中でも樹脂発泡粒子の型内成形体が、フィット感を考慮した形状自由度（設計容易性）の観点から好ましい。 Next, the synthetic resin foam will be described. The synthetic resin foam in the present invention is flexible, can be bent and deformed, and has excellent restorability. The method described in JIS K7221-2: 2006 (23 ° C. ± 2 ° C., relative humidity 50 ± 5% A test piece having a length of 350 mm, a width of 100 mm, and a thickness of 25 mm, with the skin removed, is applied with a load of up to 90 mm at a fulcrum distance of 300 mm and a test speed of 20 ± 1 mm / min, and a load deflection curve is recorded. It refers to a synthetic resin foamed molded article having a bending deflection of 20 mm or more measured according to the above and a load of 2 to 100 N at the time of 20 mm deflection. A synthetic resin foam molded article that causes fracture when the bending deflection is less than 20 mm is not suitable from the viewpoint of durability. When the cross-section of the support part 3 required to support the pressing by the body becomes very large and the load at the time of 20 mm deflection is less than 2N or more than 100N, it is difficult to generate a preferable deflection amount by the load applied by the occupant. Both of them are difficult to design. Specifically, it refers to foamed polypropylene, foamed polyethylene, other polyolefin resin foams, modified polystyrene resin foams, and the like. Among the foams, an in-mold molded body of resin foam particles is preferable from the viewpoint of shape flexibility (designability) considering a fit.

本発明で用いられる発泡粒子を構成するポリオレフィン系樹脂は、オレフィン成分単位を主成分とするポリオレフィン系樹脂であり、具体的にはポリプロピレン系樹脂やポリエチレン系樹脂、さらにそれらの２種以上の混合物などが挙げられる。なお、上記「主成分とする」とは、オレフィン成分単位がポリオレフィン系樹脂中に５０重量％以上含まれることを意味し、その含有量は好ましくは７５重量％以上であり、より好ましくは８５重量％以上であり、さらに好ましくは９０重量％以上である。 The polyolefin resin constituting the expanded particles used in the present invention is a polyolefin resin having an olefin component unit as a main component, specifically, a polypropylene resin, a polyethylene resin, and a mixture of two or more thereof. Is mentioned. The above-mentioned “main component” means that the olefin component unit is contained in the polyolefin resin in an amount of 50% by weight or more, and the content thereof is preferably 75% by weight or more, more preferably 85% by weight. % Or more, more preferably 90% by weight or more.

ポリプロピレン系樹脂としては、プロピレン成分単位が５０重量％以上の樹脂が挙げられ、例えば、プロピレン単独重合体、またはプロピレンと共重合可能な他のオレフィンとの共重合体等が挙げられる。プロピレンと共重合可能な他のオレフィンとしては、例えば、エチレンや、１−ブテン、イソブチレン、１−ペンテン、３−メチル−１−ブテン、１−ヘキセン、３，４−ジメチル−１−ブテン、１−ヘプテン、３−メチル−１−ヘキセンなどの炭素数４〜１０のα−オレフィンが例示される。また上記共重合体は、ランダム共重合体であってもブロック共重合体であってもよく、さらに二元共重合体のみならず三元共重合体であってもよい。なお、上記共重合体中のプロピレンと共重合可能な他のオレフィンは、２５重量％以下、特に１５重量％以下の割合で含有されていることが好ましく、下限値としては０．３重量％であることが好ましい。また、これらのポリプロピレン系樹脂は、単独または２種以上を混合して用いることができる。ポリプロピレン系樹脂は、ＪＩＳＫ７１６１：１９９４（試験片：ＪＩＳＫ７１６２（１９９４）記載の試験片１Ａ形（射出成形で直接成形）、試験速度：１ｍｍ／ｍｉｎ）に規定する引張弾性率（Ｅ）の値で６００ＭＰａ以上の基材樹脂を発泡してなる樹脂発泡体であることがのぞましい。 Examples of the polypropylene-based resin include resins having a propylene component unit of 50% by weight or more, and examples thereof include a propylene homopolymer or a copolymer with another olefin copolymerizable with propylene. Examples of other olefins copolymerizable with propylene include ethylene, 1-butene, isobutylene, 1-pentene, 3-methyl-1-butene, 1-hexene, 3,4-dimethyl-1-butene, 1 Examples thereof include α-olefins having 4 to 10 carbon atoms such as heptene and 3-methyl-1-hexene. The copolymer may be a random copolymer or a block copolymer, and may be not only a binary copolymer but also a ternary copolymer. The other olefin copolymerizable with propylene in the copolymer is preferably contained in a proportion of 25% by weight or less, particularly 15% by weight or less, and the lower limit is 0.3% by weight. Preferably there is. These polypropylene resins can be used alone or in combination of two or more. Polypropylene resin has a tensile elastic modulus (E) specified in JIS K7161: 1994 (test piece: JIS K 7162 (1994), test piece 1A type (direct molding by injection molding), test speed: 1 mm / min)). A resin foam obtained by foaming a base resin having a value of 600 MPa or more is preferable.

ポリエチレン系樹脂としては、エチレン成分単位が５０重量％以上の樹脂が挙げられ、例えば、高密度ポリエチレン、低密度ポリエチレン、直鎖状低密度ポリエチレン、エチレン−酢酸ビニル共重合体、エチレン−プロピレン共重合体、エチレン−プロピレン−ブテン１共重合体、エチレン−ブテン１共重合体、エチレン−ヘキセン１共重合体、エチレン−４メチルペンテン１共重合体、エチレン−オクテン１共重合体等、さらにそれらの２種以上の混合物が挙げられる。 Examples of the polyethylene resin include resins having an ethylene component unit of 50% by weight or more, such as high density polyethylene, low density polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer, ethylene-propylene copolymer. A copolymer, an ethylene-propylene-butene 1 copolymer, an ethylene-butene 1 copolymer, an ethylene-hexene 1 copolymer, an ethylene-4 methylpentene 1 copolymer, an ethylene-octene 1 copolymer, and the like. The mixture of 2 or more types is mentioned.

そして、前記合成樹脂発泡体の具体的選定にあたっては、長さ４００ｍｍ程度の棒状の試験片の両端を支持し、中央を２５ｍｍ前後押し下げ３０分間保持し、その後荷重を解放した後にサンプルの変形からの回復が９０％以上ある材料、又は、従来のウレタンフォーム製のサイドサポートで行なわれていた試験に準じ、両端を支持したサンプルの中央部を所定回数繰り返し押し下げ変形させ、その後に測定された残留歪みが所定量以下である材料が望ましい。該所定回数又は該所定量は各車両メーカーが従来材料を選定するときに任意に定めていた仕様に従う。 Then, in the specific selection of the synthetic resin foam, both ends of a rod-shaped test piece having a length of about 400 mm are supported, the center is pushed back and forth by 25 mm and held for 30 minutes, and then the load is released, and then the deformation from the sample is changed. The center part of the sample that supported both ends was repeatedly pressed down and deformed according to the test performed with a material with 90% or more recovery, or a conventional urethane foam side support, and the residual strain measured thereafter A material that is less than a predetermined amount is desirable. The predetermined number of times or the predetermined amount conforms to a specification arbitrarily determined when each vehicle manufacturer selects a conventional material.

このような条件を満たす材料として、例えば発泡ポリプロピレンの密度０．０６ｇ／ｃｍ^３〜０．０１５ｇ／ｃｍ^３、より好ましくは密度０．０３５ｇ／ｃｍ^３〜０．０１５ｇ／ｃｍ^３、又は発泡ポリエチレンの密度０．０８ｇ／ｃｍ^３〜０．０３ｇ／ｃｍ^３などが好ましい。このような材料はＪＩＳＫ７２２１−２：２００６記載の方法（２３℃±２℃、相対湿度５０±５％の雰囲下でスキンを取り除いた長さ３５０ｍｍ、幅１００ｍｍ、厚さ２５ｍｍの試験片を支点間距離３００ｍｍ、試験速度２０±１ｍｍ／ｍｉｎで最大９０ｍｍまで荷重を加え、荷重撓み曲線を記録する。）に準じて行う試験において、曲げ撓み２０ｍｍ時の荷重が２〜１００Ｎであり曲げに対する柔軟性と共に曲げ剛性にも優れているが、一方従来から一般に用いられていた軟質ウレタンフォームは、曲げ撓みが２０ｍｍ時の荷重が０．４６Ｎで、曲げ剛性が大きく劣るため、本発明のサイドサポートを構成する材料としては適切でない。 Such materials satisfying, for example, the density of the foamed polypropylene ^{^{0.06g / cm 3 ~0.015g / cm 3}} , more preferably a density ^{^{0.035g / cm 3 ~0.015g / cm 3}} , or of foamed polyethylene such as density 0.08g ^/ cm ³ ~0.03g ^/ cm 3 are preferred. Such a material is obtained by the method described in JIS K7221-2: 2006 (a test piece having a length of 350 mm, a width of 100 mm, and a thickness of 25 mm with the skin removed in an atmosphere of 23 ° C. ± 2 ° C. and a relative humidity of 50 ± 5%. In a test conducted in accordance with a distance between fulcrums of 300 mm, a test speed of 20 ± 1 mm / min up to a maximum of 90 mm, and a load deflection curve is recorded. However, the flexible urethane foam that has been used in the past has a load of 0.46 N when the bending deflection is 20 mm, and the bending rigidity is greatly inferior. It is not suitable as a material.

以下に、合成樹脂発泡体を使用した場合のクリープ性や曲げ剛性について説明する。まず、クリープ性を評価するために、ＪＩＳＫ６７６７：１９９９による圧縮永久歪を測定した。縦５０ｍｍ、横５０ｍｍ、厚み２５ｍｍの試験片を２５％歪んだ状態に圧縮し、温度２３℃±２℃において２２時間放置する。圧縮終了２４時間後の厚さを測定する。なお、圧縮永久歪は、圧縮永久歪（％）＝（試験片元厚み（ｍｍ）−圧縮終了２４時間後の厚さ（ｍｍ））÷試験片元厚み（ｍｍ）×１００で求めた。 Below, the creep property and bending rigidity at the time of using a synthetic resin foam are demonstrated. First, in order to evaluate the creep property, compression set according to JIS K 6767: 1999 was measured. A test piece having a length of 50 mm, a width of 50 mm, and a thickness of 25 mm is compressed into a 25% distorted state and left at a temperature of 23 ° C. ± 2 ° C. for 22 hours. The thickness is measured 24 hours after the end of compression. The compression set was determined by compression set (%) = (test piece original thickness (mm) −thickness 24 mm after completion of compression (mm)) ÷ test piece original thickness (mm) × 100.

試験の結果、４５倍ポリプロピレン発泡粒子成形体の圧縮永久歪は１１％であった。一方、同測定方法による発泡ポリウレタンの圧縮永久歪は２％以下である。このことは、従来、シートバックのクッション材として一般に用いられて圧縮変形によりクッション性を発揮するウレタンフォームに対し、単純に合成樹脂発泡体に置き換えたのみでは圧縮永久歪が発生し、当初のクッション性の維持が困難であり商品性が低下することが示されている。 As a result of the test, the compression set of the 45-fold polypropylene foam particle molded body was 11%. On the other hand, the compression set of the polyurethane foam by the same measuring method is 2% or less. This is because conventional urethane foam, which is generally used as a cushioning material for seat backs, exhibits cushioning properties by compressive deformation, and if it is simply replaced with a synthetic resin foam, a compression set is generated. It is shown that it is difficult to maintain the product and the commercial value is lowered.

１乗物用シート
２シートクッション
３シートクッションパッド
４サイドサポート
５サイドサポートパッド
６支持部
９内部
１０筒状体
１１上方
１２側方
１３下方の端
１９緩衝体
２０スリット
２１側面固定レール
２２弾性体
２３弾性体
３０フレーム
３１滑動用ガイド
３２滑動体 DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat cushion 3 Seat cushion pad 4 Side support 5 Side support pad 6 Support part 9 Inside 10 Cylindrical body 11 Upper 12 Side 13 Lower end 19 Buffer 20 Slit 21 Side fixed rail 22 Elastic body 23 Elastic body 30 Frame 31 Sliding guide 32 Sliding body

Claims

In the side support arranged on both sides of the vehicle seat,
A side support pad made of a synthetic resin foam having a bending deflection amount measured in accordance with the method described in JIS K7221-2: 2006 of 20 mm or more and a pressing force at the time of 20 mm deflection of 2 to 100 N,
The structure of the side support pad is
Support portions are provided at two locations near both ends separated in the longitudinal direction of the side support pad,
An opening is formed along the longitudinal direction below the elongated cylindrical body,
A side support comprising a cylindrical body having a U-shaped, C-shaped, or L-shaped cross-sectional shape in which the cross-sectional shape in the short direction between the support portions is open at the bottom.

Provided in the side of the cylindrical body of the side support pad is a vertical slit from the lower end of the side of the U-shaped, C-shaped or L-shaped cross-section with the lower open to the upper vicinity. The side support according to claim 1, wherein

The mounting configuration on the other end side that is not the side support pad side of the support portion disposed at both ends in the longitudinal direction of the side support pad is a mode in which the other end of the support portion is completely fixed to the frame, and one end of the other end of the support portion Or both can be slid in the direction perpendicular to the load direction on the frame, or one or both of the other ends of the support part can be attached in a direction to return the side support pad deformed by the load caused by the load to the unloaded condition The side support according to claim 1 or 2, wherein an elastic body for applying a force is connected and the other end of the support portion is elastically provided.

The elastic body which provides urging | biasing force in the direction which returns the side support pad which deform | transformed with the load by the load to the state at the time of no load was arrange | positioned on the back surface side above the cylindrical body of the said side support pad. Side support in any one of thru | or 3.

The side support according to any one of claims 1 to 4, wherein a buffer is disposed inside the cylindrical body.