JP2016106831A - Cushion body - Google Patents

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JP2016106831A
JP2016106831A JP2014247026A JP2014247026A JP2016106831A JP 2016106831 A JP2016106831 A JP 2016106831A JP 2014247026 A JP2014247026 A JP 2014247026A JP 2014247026 A JP2014247026 A JP 2014247026A JP 2016106831 A JP2016106831 A JP 2016106831A
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support
elastic body
cushion
person
synthetic resin
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暢彦 梶木
Nobuhiko Kajiki
暢彦 梶木
村田 誠志郎
Seishiro Murata
誠志郎 村田
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Toyo Seat Co Ltd
JSP Corp
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Toyo Seat Co Ltd
JSP Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a cushion body that is lightweight and gives a person excellent cushioning properties when the person sits thereon or lies on his/her back thereon.SOLUTION: The problem is solved by a cushion body 1 that includes a plurality of rod-like or flat-plate-like supports 2 that are made of a synthetic resin foam of which amount of bending deflection is greater than or equal to 20 mm measured according to a method described in JIS K7221-2:2006 and of which pressing force is 2 to 100 N at 20 mm deflection and that are bent and deformed by a load of a person sitting or a person lying on his/her back thereon; and an elastic body 4 that is disposed on back surfaces of the supports, enables the supports to be bent and deformed, and has a damping property so as to be compressed and deformed in response to the bending and deformation of the supports by the load of the person sitting or the person lying on his/her back thereon.SELECTED DRAWING: Figure 1

Description

本発明は、人の着座時や仰臥時に利用される、車両、船舶及び飛行機等の乗物用シート、ソファ、椅子、座布団、ベッド、寝台車、マットレス、敷布団、枕、マット等に構成要素として使用されるクッション体であって、軽量化を促進させ、リサイクル性に富み、座り心地や寝心地に富むクッション体に関する。   The present invention is used as a component for vehicle seats such as vehicles, ships and airplanes, sofas, chairs, cushions, beds, sleepers, mattresses, mattresses, pillows, mats, etc., used when a person is sitting or lying on the back The present invention relates to a cushion body that promotes weight reduction, is highly recyclable, and is comfortable to sit and sleep.

一般にクッション体は、枠体に張架されたワイヤーや平板状の支持体等の押圧を最終的に支える構造体上に、ウレタンフォーム等の軟質なクッション材を載せ全体を表皮で被覆した構成を有する。そして、座布団やベッドのマットレス等もそれ自体は構造体を内在させていないが、床やベッドの枠体等、人体の押圧を支えうる構造体の上に載せて使用することが一般的である。   In general, a cushion body has a structure in which a soft cushioning material such as urethane foam is placed on a structure that finally supports pressing such as a wire stretched on a frame or a flat support, and the entire surface is covered with a skin. Have. Also, cushions, bed mattresses, and the like themselves do not contain a structure, but they are generally used on a structure that can support the pressure of the human body, such as a floor or a frame of a bed.

一般的なクッション体においては、クッション材に加えられる振動や衝撃は、主に構造体と表皮との間に介在されるウレタンフォーム等の軟質なクッション材が圧縮方向に撓んだ際の反力、復元力及び撓みによって軽減されていた。   In general cushion bodies, vibrations and impacts applied to the cushion material are mainly reaction forces when a soft cushion material such as urethane foam interposed between the structure and the skin is bent in the compression direction. It was alleviated by restoring force and deflection.

また、車両用シートクッションの軽量化に関する技術として、特許文献1にシートフレームが枠状を呈し、シートフレームの断面が山形を呈すると共に、シートフレームの枠状の内周側に前記山形の一側を形成して着座者に対向する傾斜面を有し、シートフレームに弾性を有するネットを被せ、その周縁部をシートフレームの山形上から引き回して該山形の他側に固定することで凹曲面状の着座面を形成するように張設し、ネットとシートフレームの傾斜面との間に角度を設けた技術が開示されている。   Further, as a technique related to weight reduction of a vehicle seat cushion, Patent Document 1 shows a frame shape of a seat frame, a cross section of the seat frame has a mountain shape, and one side of the mountain shape on a frame shape inner peripheral side of the seat frame. A concave curved surface is formed by covering the seat frame with an elastic net and pulling its peripheral edge from above the chevron of the seat frame and fixing it to the other side of the chevron. A technique is disclosed in which the seating surface is stretched so as to form a seating surface, and an angle is provided between the net and the inclined surface of the seat frame.

他の軽量化に関する技術としては、特許文献2に、シートフレームに着脱可能に取り付けられたベースプレートと、該ベースプレート上に配置されたブロックと、該ブロック上に配置されたスプリングプレートと、該スプリングプレートを被覆する表皮7とを備える着座部を有し、前記ブロックは、前記ベースプレートと前記スプリングプレート間に所定の空間を形成するように配置され、前記スプリングプレートは、弾性を有する発泡体であるPP(ポリプロピレン)ビーズ発泡体、PE(ポリエチレン)ビーズ発泡体、PP発泡体、PE発泡体、AS樹脂(アクリロニトリル/スチレン樹脂)発泡体、EVA(エチレン酢酸ビニル共重合樹脂)及びウレタンフォーム材のいずれかで形成されている発泡体で成形され、前記スプリングシートは、前記ベースプレート方向への力が加えられたときに前記空間内へ撓む車両用シートに関する技術が開示されている。   As another technique related to weight reduction, Patent Document 2 discloses a base plate detachably attached to a seat frame, a block disposed on the base plate, a spring plate disposed on the block, and the spring plate. A seating portion having a skin 7 covering the surface, wherein the block is disposed so as to form a predetermined space between the base plate and the spring plate, and the spring plate is a foam having elasticity. One of (polypropylene) bead foam, PE (polyethylene) bead foam, PP foam, PE foam, AS resin (acrylonitrile / styrene resin) foam, EVA (ethylene vinyl acetate copolymer resin) and urethane foam material Formed with a foam formed of It is a technique related to a vehicle seat flexes the space is disclosed when a force to said base plate direction was added.

次に、ベッドマットレス用としてクッション体を組み込んだ場合は、ベッドマットレスは一般にウレタンフォームをクッション材として用いており、該ベッドマットレスの軽量化技術に関する技術としては、特許文献3に、支持体が矩形のウレタンフォームからなり、短辺方向の両端部まで達する複数の凹溝を表面に備えており、該凹溝は深さ30〜70mm、幅15〜80mmであり、芯材が厚さ10〜40mm、硬さ100〜300Nである矩形のウレタンフォームからなり、短辺を長辺方向に二つ折りされ、長辺の両端部が支持体の一つの凹溝に嵌合支持されており、枠体が支持体の周囲を囲むように設けられた技術が開示されている。   Next, when a cushion body is incorporated for a bed mattress, the bed mattress generally uses urethane foam as a cushioning material. As a technique relating to the weight reduction technology of the bed mattress, Patent Document 3 discloses that the support is rectangular. The surface is provided with a plurality of grooves that reach both ends in the short side direction, the grooves have a depth of 30 to 70 mm, a width of 15 to 80 mm, and a core material of 10 to 40 mm in thickness. , Made of a rectangular urethane foam having a hardness of 100 to 300 N, the short side is folded in two in the long side direction, both ends of the long side are fitted and supported in one concave groove of the support, and the frame is A technique provided to surround the periphery of the support is disclosed.

特開2002−28044号公報JP 2002-28044 A 特許第4009490号公報Japanese Patent No. 4009490 特開2009−279086号公報JP 2009-279086 A

従来の一般的な車両用シートクッションでは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、車両用シートクッションは乗員の体重の軽重にかかわらず最適なクッション性を求められることの他に、自動車の運動に伴い乗員に加えられる上下の加速度に対し、乗員の身体に不快感を与えないクッション性が求められる。反面、長時間の乗車時の疲労を軽減するためには乗員の身体を正しい位置や姿勢で支える必要がある。このため非常に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、ある程度の剛性を確保するためウレタンフォームの密度を一定以上とする必要があり、大幅な軽量化が進まないという問題があった。 In conventional general vehicle seat cushions, urethane foam is used as a cushioning material, 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, in addition to being required to have optimal cushioning regardless of the weight of the occupant's weight, the vehicle seat cushions can cause the occupant's body to feel uncomfortable with the vertical acceleration applied to the occupant as the vehicle moves. No cushioning is required. On the other hand, to reduce fatigue when riding for a long time, it is necessary to support the occupant's body in the correct position and posture. For this reason, the function cannot be satisfied with only a very soft urethane foam, and the density of the urethane foam needs to be a certain level or more in order to secure a certain degree of rigidity. It was.

特許文献1に記載の技術は、乗員による押圧を支えるネット素材がシートクッション周囲に設置されたシートフレームに引き込まれ強固に固定されており、乗員の着座により加えられた押圧はネット素材を通じ最終的にシートフレームの剛性により支えられていた。従ってシートフレームの構造は一定以上の強度を保たねばならず、このため従来のクッション材に相当するネット素材自体の重量は軽量であるものの、シートフレームの重量は増加傾向にあり全体としての重量軽減効果が十分ではないという問題があった。 In the technique described in Patent Document 1, the net material that supports the pressure applied by the occupant is drawn into the seat frame installed around the seat cushion and is firmly fixed, and the pressure applied by the occupant's seating is finally transmitted through the net material. It was supported by the rigidity of the seat frame. Therefore, the structure of the seat frame must maintain a certain level of strength. For this reason, although the weight of the net material itself corresponding to the conventional cushion material is light, the weight of the seat frame tends to increase and the overall weight There was a problem that the reduction effect was not sufficient.

さらに、ネット素材のクッション性は主に素材の伸びによって得られるため限定されており、長期間の使用によりたるみが発生し商品性に劣る傾向にもあった。またシートフレームに平面的なネット素材を張架する構造であるため、基本的なシートクッションの形状は平面的であり、乗員の身体を最適な位置で支えるために必要な三次元形状を得ることが困難であり、その結果、乗員に不快感を与えるという問題があった。これは自動車の運動によって乗員へ横Gが加えられる際等、不安定なハンモック状のネット素材では乗員の身体を安定して支えることができないからである。 Furthermore, the cushioning property of the net material is limited because it is obtained mainly by the elongation of the material, and there is a tendency that sagging occurs due to long-term use and the merchantability is inferior. In addition, since the flat net material is stretched around the seat frame, the basic seat cushion shape is flat, and the three-dimensional shape necessary to support the occupant's body in an optimal position is obtained. As a result, there is a problem that the passengers feel uncomfortable. This is because an unstable hammock-like net material cannot stably support the occupant's body when a lateral G is applied to the occupant by the movement of the automobile.

次に、特許文献2の技術については、スプリングプレートは外形略矩形の板状発泡体であり該スプリングプレートの乗員が着座する側には横方向に複数の溝が形成されている。しかし、溝部が浅いと柔軟性を与えることができず、溝部が深ければクッション材が撓む際、わずかに残った溝部底部の連結部分へ過大な引っ張り力が集中し大きな伸び変形が発生するため復元不能な永久変形を生じる、あるいは破断する恐れが高かった。溝底部にある連結部分が一部でも破壊されれば支えを一気に失いクッション材全体の見かけ硬さが急激に低下し、クッション材としての機能が大きく損なわれる。従って破壊を回避するためクッション材の撓みを一定以上に設計することが事実上困難であり、十分な着座時のフィット感及び快適性を付与することが困難であった。 Next, as for the technique of Patent Document 2, the spring plate is a plate-like foam having a substantially rectangular outer shape, and a plurality of grooves are formed in the lateral direction on the side of the spring plate on which an occupant sits. However, if the groove is shallow, flexibility cannot be given, and if the groove is deep, when the cushion material bends, excessive tensile force concentrates on the connecting part of the remaining groove bottom, causing large elongation deformation. There was a high risk of permanent deformation that could not be restored or fracture. If even a part of the connecting portion at the groove bottom is broken, the support is lost at once, the apparent hardness of the entire cushioning material is drastically lowered, and the function as the cushioning material is greatly impaired. Therefore, it is practically difficult to design the deflection of the cushion material to a certain level or more in order to avoid breakage, and it is difficult to provide a sufficient fit and comfort when seated.

また、特許文献2の技術は、乗員の体格に応じて、高さの異なるブロックを適宜選択することにより個人的に良好な着座感を得ることができるとの記載があるが、乗員は体重の軽重によって着座する前に自分に適する高さのブロックに変えなければならないという、現実的には実施困難な対応をしなければならないという問題があった。 Moreover, although the technique of patent document 2 has described that it can obtain a favorable seating feeling personally by selecting suitably the block from which height differs according to a passenger | crew's physique, There was a problem that in reality it had to be difficult to implement, because it had to be changed to a block of height suitable for me before sitting down by light weight.

次に、特許文献3の技術は、従来の金属製スプリングを用いたマットレスに比べれば軽量であるものの、支持体2及び芯体にウレタンフォームを使用しているので、リサイクル性能に劣り軽量化にも限界があるという問題があった。 Next, although the technology of Patent Document 3 is lighter than a conventional mattress using a metal spring, since the urethane foam is used for the support 2 and the core, the recycling performance is inferior and the weight is reduced. There was a problem that there was a limit.

そこで、本発明の目的は、人の着座時や仰臥時にクッション性、フィット性に富み、軽量化かつリサイクル性に優れるクッション体を提供することである。 SUMMARY OF THE INVENTION An object of the present invention is to provide a cushion body that is rich in cushioning and fitting properties when sitting or lying on a person, and is lightweight and excellent in recyclability.

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、JIS K7221−2:2006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となるまで押圧を加え、押圧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撓み時の押圧が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 test piece having a width of 100 mm and a thickness of 25 mm is pressed until the maximum deflection is 90 mm at a fulcrum distance of 300 mm and a test speed of 20 ± 1 mm / min, and a press deflection curve is recorded. ) Refers to a synthetic resin foam molded article having a bending deflection of 20 mm or more measured according to) and a pressing force of 2 to 100 N at the time of 20 mm deflection. 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程度の棒状又は平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、その後押圧を解放した後にサンプルの変形からの回復が90%以上あることが望ましい。あるいは従来のウレタンフォーム製の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 the material, both ends of a bar-like or flat plate-like test piece having a length of about 400 mm are supported, the center is pushed back and forth by about 25 mm and held for 30 minutes, and then the pressure is released, and then recovery from the deformation of the sample occurs. 90% or more is desirable. Alternatively, in accordance with a test performed with a conventional urethane foam 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 determined. It is desirable to be below the fixed 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〜0.015g/cm、より好ましくは密度0.035g/cm〜0.015g/cm、または発泡ポリエチレンの密度0.08g/cm〜0.03g/cm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 that has an open cell structure, synthetic resin foam that has a closed cell structure is generally lighter, more rigid, and more recyclable than urethane foam that has been commonly used as a cushioning material. Although it had the advantage of being easy, etc., when using bending and restoring force in the compression direction as a cushion, the reaction force tends to increase rapidly with the deformation of the foam due to the repulsive force of the air included It was inferior in comfort because it felt stiff and lacked cushioning.

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クッション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 was not preferable as a material for a cushion 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体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 a method of utilizing the bending deformation and recoverability of a support made of a synthetic resin foam excellent in the above 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に記載のクッション体1は、JIS K7221−2:2006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、着座者又は仰臥者の荷重を受けて曲げ変形する複数の棒状10又は複数の平板状11の支持体2と、前記支持体2の裏面側に配設した、前記支持体2の曲げ変形を可能とし、かつ着座者又は仰臥者の荷重による前記支持体2の曲げ変形に対して圧縮変形して減衰性を有する弾性体4と、を備えることを特徴とする。 In order to solve the problem described in “Problems to be Solved by the Invention”, the cushion body 1 according to claim 1 has a bending deflection amount of 20 mm or more measured according to the method described in JIS K7221-2: 2006. And a support 2 in the form of a plurality of rods 10 or a plurality of plates 11 which is made of a synthetic resin foam having a pressure of 20 to 100 mm and is bent and deformed under the load of a seated person or a supine person, and the support. An elastic body that is disposed on the back side of the body 2 and is capable of bending deformation of the support body 2 and has a damping property by compressive deformation with respect to the bending deformation of the support body 2 caused by a load of a seated person or a supine person 4.

請求項2に記載のクッション体1は、請求項1において、前記支持体2と、クッション体1の背面を形成する背面体30との間に、前記弾性体4を配設したことを特徴とする。 The cushion body 1 according to claim 2 is characterized in that, in claim 1, the elastic body 4 is disposed between the support body 2 and a back body 30 that forms the back surface of the cushion body 1. To do.

請求項3に記載のクッション体1は、請求項1又は2において、前記弾性体が、JIS K6400−2:2012に規定された25%圧縮時の硬さが20〜600Nであることを特徴とする。 The cushion body 1 according to claim 3 is characterized in that, in claim 1 or 2, the elastic body has a hardness at 20% compression of 20 to 600 N as defined in JIS K6400-2: 2012. To do.

請求項4に記載のクッション体1は、請求項1又は3において、前記支持体2が複層構造で、少なくとも着座者又は仰臥者が接する側の1層目の支持体2の裏面側に前記弾性体4を配設したことを特徴とする。 The cushion body 1 according to a fourth aspect is the cushion body 1 according to the first or third aspect, wherein the support body 2 has a multilayer structure, and at least the back surface side of the first support body 2 on the side where a seated person or a supine person is in contact The elastic body 4 is provided.

請求項5に記載のクッション体1は、請求項1乃至4のいずれかにおいて、前記弾性体4が柱状体であることを特徴とする。 A cushion body 1 according to a fifth aspect is characterized in that, in any one of the first to fourth aspects, the elastic body 4 is a columnar body.

請求項6に記載のクッション体1は、請求項1乃至5のいずれかにおいて、前記弾性体4内に合成樹脂発泡体20を内在させたことを特徴とする。 A cushion body 1 according to a sixth aspect is characterized in that, in any one of the first to fifth aspects, a synthetic resin foam 20 is contained in the elastic body 4.

請求項7に記載のクッション体1は、請求項1乃至6のいずれかにおいて、前記弾性体4内に、孔21や空洞22を設けたことを特徴とする。 The cushion body 1 according to a seventh aspect is characterized in that, in any one of the first to sixth aspects, a hole 21 and a cavity 22 are provided in the elastic body 4.

請求項8に記載のクッション体1は、請求項1乃至7のいずれかにおいて、前記支持体2の表面を覆うように弾性体4を覆設したことを特徴とする。 A cushion body 1 according to an eighth aspect is characterized in that, in any one of the first to seventh aspects, an elastic body 4 is provided so as to cover the surface of the support body 2.

請求項9に記載のクッション体1は、請求項1乃至8のいずれかにおいて、複数の棒状又は複数の平板状の支持体2間に設けた間隙12から、前記支持体2の裏面側に配設した弾性体4を、前記支持体2の表面より突出させたことを特徴とする。 According to a ninth aspect of the present invention, the cushion body 1 according to any one of the first to eighth aspects is arranged on the back surface side of the support body 2 from the gaps 12 provided between the plurality of rod-shaped or flat plate-shaped support bodies 2. The provided elastic body 4 is protruded from the surface of the support 2.

請求項1に記載のクッション体1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着座者や仰臥者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ウレタンフォーム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 cushion body 1 described in claim 1 can replace the urethane foam that has been conventionally used in general with a synthetic resin foam, so that weight reduction and improvement in recyclability can be achieved. It is possible. 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 High degree of merchandise that can properly support the body of a seated person or a supine person and obtain high comfort, and exhibits excellent creep resistance equivalent to conventional urethane foam even when used for a long time. It has the effect of having.

さらに、支持体2の曲げ変形する領域に、圧縮可能な弾性体4であって、着座者又は仰臥者の荷重による支持体2の曲げ変形に対して減衰性を有する弾性体4を配設することによって、支持体2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、支持体2に対する、例えば子供の飛び跳ねで生ずる衝撃や重量物落下時の衝撃に対する耐久性を向上させることができ、不特定な位置に高速かつ大荷重の衝撃が加えられる場合にあっても支持体2の裏面に弾性体4の支持があるため合成樹脂発泡体からなる支持体2の破損を有効に防止することができる。 Further, the elastic body 4 that is compressible and has a damping property against the bending deformation of the support body 2 due to the load of the seated person or the supine person is disposed in the bending deformation area of the support body 2. By this, the bending deformation which arises in the support body 2 can be attenuate | damped, and cushioning properties can be improved. In addition, durability against shocks caused by, for example, jumping of children and impacts when heavy objects are dropped on the support 2 can be improved, and even when a high-speed and heavy load impact is applied to an unspecified position. Since the elastic body 4 is supported on the back surface of the support 2, breakage of the support 2 made of the synthetic resin foam can be effectively prevented.

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、剛性のある背面体30により弾性体4が支持されるため、弾性体4の圧縮変形が更に確実なものになるという効果を奏する。また、クッション体1はその表面側を合成樹脂発泡体で裏面側を弾性体4で構成しているため、クッション体1における支持体2以外の部位においても、合成樹脂発泡体の厚みを薄くしかつ弾性体4が減衰性を有し圧縮変形して復元性を有することによってクッション性を高めることができ、合成樹脂発泡体が過度な曲げ変形などで破壊されることを有効に防止することができる。 The invention described in claim 2 has the same effect as that of the invention described in claim 1, and the elastic body 4 is supported by the rigid back body 30, so that the elastic body 4 is more reliably compressed and deformed. Has the effect of becoming. In addition, since the cushion body 1 is composed of a synthetic resin foam on the front side and an elastic body 4 on the back side, the thickness of the synthetic resin foam is reduced even at a portion other than the support body 2 in the cushion body 1. Moreover, the elastic body 4 has a damping property and can be compressed and deformed so that the cushioning property can be enhanced, and the synthetic resin foam can be effectively prevented from being broken due to excessive bending deformation or the like. it can.

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、さらに使用する弾性体4がクッション体1のクッション材として適当な圧縮硬さと減衰性を有し、圧縮変形からの復元性を有する弾性体4とすることができる。 The invention according to claim 3 has the same effect as that of the invention according to claim 1 or 2, and further, the elastic body 4 to be used has a compression hardness and a damping property suitable as a cushion material of the cushion body 1, It can be set as the elastic body 4 which has the restoring | restoration property from a compressive deformation.

請求項4に記載の発明は、請求項1又は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、着座者又は仰臥者が接する側の1層目の支持体2の裏面側であって、複層化した支持体2間に配設範囲を狭く限定して、高い圧縮性と高い復元性を有するが重い弾性体4を配設するので、弾性体4の体積を減ずることになりクッション体1の軽量化を図ることができる。 The invention described in claim 4 has the same effect as that of the invention described in either claim 1 or 3, and is on the back surface side of the first support 2 on the side where the seated person or the supine person contacts. Further, since the arrangement range is narrowly limited between the multi-layered supports 2 and the elastic body 4 having high compressibility and high resilience is disposed but heavy, the volume of the elastic body 4 is reduced and the cushion is reduced. The weight of the body 1 can be reduced.

請求項5に記載の発明は、請求項1、3又は4に記載の発明と同じ効果を奏するとともに、弾性体4を柱状体とすることによって、支持体2の裏面とクッション体1の背面を形成する背面体30との間の一部に空間を形成することができるので、弾性体4の体積を減じてさらなる軽量化を図ることができる。 The invention described in claim 5 has the same effect as that of the invention described in claim 1, 3 or 4, and the elastic body 4 is a columnar body, whereby the back surface of the support body 2 and the back surface of the cushion body 1 are provided. Since a space can be formed in a part between the back body 30 to be formed, the volume of the elastic body 4 can be reduced and further weight reduction can be achieved.

請求項6に記載の発明は、請求項1乃至5のいずれかに記載の発明と同じ効果を奏するとともに、さらに合成樹脂発泡体20が弾性体4に内在しているため、着座者や仰臥者の体重差等により支持体2に加えられる体重が変化する際、段階的にクッション性を変化させたり、腰部や臀部等の必要な個所のみ部分的に硬さを変化させることができるという効果を奏する。 The invention according to claim 6 has the same effect as the invention according to any one of claims 1 to 5, and further, since the synthetic resin foam 20 is inherent in the elastic body 4, a seated person or a supine person When the weight applied to the support 2 changes due to the difference in body weight, etc., the cushioning property can be changed step by step, or the hardness can be partially changed only at necessary places such as the waist and buttocks. Play.

請求項7に記載の発明は、請求項1乃至6のいずれかに記載の発明と同じ効果を奏するとともに、弾性体4に孔21や空洞22を設けることにより、さらにきめ細かく弾性体4のクッション性を部分的に調整したり、通気性を向上させるという効果を奏する。 The invention according to claim 7 has the same effect as the invention according to any one of claims 1 to 6, and the cushioning property of the elastic body 4 is more finely provided by providing the elastic body 4 with the hole 21 and the cavity 22. There is an effect of partially adjusting the air permeability and improving the air permeability.

請求項8に記載の発明は、請求項1乃至7のいずれかに記載の発明と同じ効果を奏するとともに、さらに着座者又は仰臥者が着座又は仰臥した瞬間のクッション性を高めることができるという効果を奏する。 The invention according to claim 8 has the same effect as the invention according to any one of claims 1 to 7, and can further enhance the cushioning property at the moment when the seated person or the supine person sits or lies. Play.

請求項9に記載の発明は、請求項1乃至8のいずれかに記載の発明と同じ効果を奏するとともに、さらに着座者や仰臥者に対して、棒状又は板状の支持体2相互に生じる段差により角部の凹凸を感じるという違和感を緩和するという効果を奏する。 The invention according to claim 9 has the same effect as the invention according to any one of claims 1 to 8, and further, a step generated between the rod-like or plate-like supports 2 with respect to a seated person or a supine person. This has the effect of alleviating the uncomfortable feeling of feeling the unevenness of the corners.

棒状の支持体、脚体及び背面体を備えるクッション体の概要図である。It is a schematic diagram of a cushion body provided with a rod-shaped support, a leg, and a back body. 平板状の支持体、脚体及び背面体を備えるクッション体の概要図である。It is a schematic diagram of a cushion body provided with a flat support body, a leg body, and a back body. 図1のB−B断面図で、(a)が無負荷時の状態を示し、(b)が負荷時の曲げ変形した状態を示した図である。It is BB sectional drawing of FIG. 1, (a) shows the state at the time of no load, (b) is the figure which showed the state which carried out the bending deformation at the time of load. 支持体の裏面に部分的に弾性体を接触した形態の断面図で、(a)が図1のB−B断面図で、(b)が図1のA−A断面図である。It is sectional drawing of the form which contacted the elastic body partially on the back surface of the support body, (a) is BB sectional drawing of FIG. 1, (b) is AA sectional drawing of FIG. 弾性体が柱状体の場合の図で、(a)が斜視図で、(b)が支持体と弾性体が接する場合のC―C断面図で、(c)が支持体と弾性体との間隙を部位によって変えた場合のD―D断面図で、(d)が支持体と弾性体とを密着させた場合のD―D断面図である。It is a figure in case an elastic body is a columnar body, (a) is a perspective view, (b) is CC sectional drawing in case a support body and an elastic body contact | connect, (c) is a support body and an elastic body. It is DD sectional drawing at the time of changing a space | gap according to a site | part, (d) is DD sectional drawing when a support body and an elastic body are stuck. 支持体が複層構造で四角枠状の場合の図で、(a)が斜視図で、(b)がE―E断面図である。FIG. 4 is a diagram in the case where the support has a multi-layer structure and a rectangular frame shape, where (a) is a perspective view and (b) is an EE sectional view. 支持体が複層構造の場合の図で、(a)が斜視図で、(b)が表面側支持体と裏面側支持体間に単一種類の弾性体を配設した場合の図7(a)のF−F断面図で、(c)が表面側支持体と裏面側支持体間に複数種類の弾性体を配設した場合の図7(a)のF−F断面図である。FIG. 7 is a diagram in the case where the support has a multi-layer structure, where (a) is a perspective view, and (b) is a diagram in which a single type of elastic body is disposed between the front-side support and the back-side support. It is FF sectional drawing of a), (c) is FF sectional drawing of Fig.7 (a) at the time of arrange | positioning multiple types of elastic bodies between the surface side support body and the back surface side support body. 弾性体内に合成樹脂発泡体を内在させた形態の図1のB−B断面図である。It is BB sectional drawing of FIG. 1 of the form which made the synthetic resin foam exist in an elastic body. 弾性体内に孔や空洞を設けた形態の図1のB−B断面図で、(a)が孔を設けた断面図で、(b)が空洞を設けた断面図である。FIG. 3 is a cross-sectional view taken along the line B-B of FIG. 1 in which holes and cavities are provided in an elastic body, where (a) is a cross-sectional view provided with holes and (b) is a cross-sectional view provided with cavities. 支持体の表面に薄厚の弾性体を覆設した形態の図1のB−B断面図である。It is BB sectional drawing of FIG. 1 of the form which covered the thin elastic body on the surface of the support body. クッション体の背面を支える部材の例を示す斜視図で、(a)が背面体が背面板の場合、(b)が背面体がスプリングやワイヤー等からなる場合の図である。It is a perspective view which shows the example of the member which supports the back surface of a cushion body, (a) is a figure in case a back surface body consists of a spring, a wire, etc., when a back surface body is a backplate. 支持体の表面側に弾性体が突出している図で、(a)がクッション体の斜視図で、(b)が(a)におけるG―G断面図である。It is the figure which the elastic body protrudes in the surface side of a support body, (a) is a perspective view of a cushion body, (b) is GG sectional drawing in (a).

以下、本発明に係るクッション体1の実施形態について説明する。 Hereinafter, embodiments of the cushion body 1 according to the present invention will be described.

本発明に係るクッション体1は、人の着座時や仰臥時に利用される、車両、船舶及び飛行機等の乗物用シート、ソファ、椅子、座布団、ベッド、寝台車、マットレス、敷布団、枕、マット等に、クッションとしての構成要素とすることができる。 The cushion body 1 according to the present invention is used when a person is seated or lying on the back, such as a vehicle, a ship, a seat for a vehicle such as an airplane, a sofa, a chair, a cushion, a bed, a sleeper, a mattress, a mattress, a pillow, a mat, and the like. Moreover, it can be set as the component as a cushion.

本発明であるクッション体1は、図1や図2に示すように、JIS K7221−2:2006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、着座者又は仰臥者の荷重を受けて曲げ変形する複数の棒状10又は複数の平板状11の支持体2と、前記支持体2の裏面側に配設した、前記支持体2の曲げ変形を可能とし、かつ着座者又は仰臥者の荷重による前記支持体2の曲げ変形に対して圧縮変形して減衰性を有する弾性体4とを備える。また、図1に示すように背面体30を備える。背面体は、図11に示すクッション体1の背面を支える部材32に設けられており、例えば、図11(a)に示すような背面板、又は、図11(b)に示すようにフレーム31等に張架されたワイヤーやスプリング等を意味し、弾性体4に接しクッション体1の背面側から弾性体4などを支持する構成要素をいう。 As shown in FIGS. 1 and 2, the cushion body 1 according to the present invention has 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 is 2 to 100 N. A plurality of rod-like 10 or a plurality of flat-plate-like support bodies 2 that are bent and deformed under the load of a seated person or a supine person, and disposed on the back side of the support body 2. And an elastic body 4 which is capable of bending deformation of the support body 2 and has a damping property by compressing and deforming the bending deformation of the support body 2 due to a load of a seated person or a supine person. Moreover, the back body 30 is provided as shown in FIG. The back body is provided on a member 32 that supports the back surface of the cushion body 1 shown in FIG. 11. For example, the back plate as shown in FIG. 11A or the frame 31 as shown in FIG. 11B. It means a wire, a spring, or the like that is stretched between the elastic body 4 and the elastic body 4 that supports the elastic body 4 from the back side of the cushion body 1.

背面板は、合成樹脂、金属板、又はそれらの複合材からなる材質からなり、剛性を有し、弾性体4の圧縮変形のときの壁的存在である。また、フレーム31は、合成樹脂、金属、又はそれらの複合材からなる材質からなり剛性を有する。 The back plate is made of a material made of a synthetic resin, a metal plate, or a composite material thereof, has rigidity, and is a wall presence when the elastic body 4 is compressed and deformed. The frame 31 is made of a material made of synthetic resin, metal, or a composite material thereof, and has rigidity.

本発明のクッション体1は、本発明の支持体2の材料である合成樹脂発泡体を使用するために支持体2と脚体3との構成が図1又は図2に示すように略門型から形成されることを基本型としており、人の着座時や仰臥時の荷重によって、図3(a)に示す支持体2の状態から、図3(b)に示すように合成樹脂発泡体からなる支持体2が曲げ変形して撓むことによって、本発明に係るクッション体1が着座者や仰臥者に高い座り心地や高い寝心地を感じさせることができる。   Since the cushion body 1 of the present invention uses the synthetic resin foam which is the material of the support body 2 of the present invention, the structure of the support body 2 and the leg body 3 is substantially gate-shaped as shown in FIG. 1 or FIG. From the state of the support body 2 shown in FIG. 3 (a), from a synthetic resin foam as shown in FIG. 3 (b), depending on the load at the time of sitting or lying on the person. When the support body 2 is bent and deformed, the cushion body 1 according to the present invention can make a seated person or a supine person feel high sitting comfort or high sleeping comfort.

まず、支持体2について説明する。支持体2は、材料が合成樹脂発泡体からなり、人の着座又は仰臥による荷重9で曲げ変形し撓みを生ずる。支持体2の形態として、図2に示すように複数の平板状11の形態、及び、図1に示すように複数の棒状10の形態、図7に示すように複層構造6の形態がある。複数の棒状10又は複数の平板状11の形態の場合には、支持体2間に間隙12が設けられる。支持体2の形態は、荷重により曲げ変形可能な形態であればよい。 First, the support 2 will be described. The support 2 is made of a synthetic resin foam, and is bent and deformed by a load 9 caused by a person sitting or lying on the back. As the form of the support 2, there are a form of a plurality of flat plates 11 as shown in FIG. 2, a form of a plurality of bars 10 as shown in FIG. 1, and a form of a multilayer structure 6 as shown in FIG. 7. . In the case of the form of a plurality of rods 10 or a plurality of flat plates 11, gaps 12 are provided between the supports 2. The support 2 may be in any form that can be bent and deformed by a load.

支持体2がいずれの形態の場合であっても、着座者又は仰臥者が当接する面が合成樹脂発泡体からなる支持体2で、その支持体2の曲げ変形する側の領域に圧縮変形しやすく荷重に対して減衰性を有する弾性体4が配設される。 Regardless of the form of the support 2, the surface on which the seated person or the supine person abuts is the support 2 made of a synthetic resin foam, and is compressed and deformed into a region of the support 2 on the side to be bent. The elastic body 4 that easily attenuates the load is disposed.

前記弾性体4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JIS K6400−2:2012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)の硬さが好ましくは20〜600Nであるものをいう。弾性体4の形状や大きさによって減衰性が最適になる硬さを設定する。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。 Examples of the elastic body 4 include urethane foam, foamed resin molded body, foamed resin particles, foamed rubber, elastomer, fibrous material, three-dimensional knitted fabric, wool, silk, cotton, and fiber joints such as a three-dimensional spring structure. It consists of a material that has resilience to repeated loads, such as stretchable bags or spheres sealed with gas, and a material that has damping properties, such as fibers and rubber. It is a pressure plate of a flat disk having a diameter of 200 mm as defined in JIS K6400-2: 2012 regarding the method for determining the thickness, and it has a hardness at 25% compression (D method) of preferably 20 to 600N. Depending on the shape and size of the elastic body 4, the hardness at which the damping property is optimal is set. 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.

弾性体4の形態は、前記支持体2の裏面と、クッション体1の背面を支える部材32の構成要素である背面体30との間に、図3(a)に示すように前記支持体2の裏面全域に亘って接触させて、図4(a)に示すように前記支持体2の裏面に部分的に接触させて、又は、図4(b)に示すように前記支持体2の裏面と所定の間隙を設けて、前記弾性体4を配設する形態等がある。 As shown in FIG. 3A, the elastic body 4 is formed between the back surface of the support body 2 and the back body 30 that is a component of the member 32 that supports the back surface of the cushion body 1. Of the support 2 as shown in FIG. 4 (a) or partially in contact with the back of the support 2 as shown in FIG. 4 (b). There is a form in which the elastic body 4 is disposed with a predetermined gap.

次に、図5に示すように門型の支持体2の曲げ変形側に柱状13の弾性体4を配設する形態がある。この場合に、図5(d)に示すように支持体2の裏面に弾性体4の表面を接する形態、又は図5(c)に示すように支持体2の裏面と弾性体4の表面との間隙を支持体2の部位によって変える形態がある。前記間隙を広げるに従い、着座者が着座した直後は支持体2の曲げ変形のみとしその後弾性体4の圧縮変形が加わることから、早く沈み込みさせたい部位は弾性体4との間隙を広げ、ゆっくりと沈み込ませたい部位には弾性体4を密着させて配設する。 Next, as shown in FIG. 5, there is a form in which the columnar elastic body 4 is disposed on the bending deformation side of the gate-shaped support body 2. In this case, the form in which the surface of the elastic body 4 is in contact with the back surface of the support 2 as shown in FIG. 5 (d), or the back surface of the support 2 and the surface of the elastic body 4 as shown in FIG. 5 (c). There is a form in which the gap is changed depending on the part of the support 2. As the gap is increased, immediately after the seated person is seated, only the bending deformation of the support body 2 is performed, and then the compression deformation of the elastic body 4 is applied. The elastic body 4 is disposed in close contact with the portion to be submerged.

次に、支持体2が、表面側7の支持体2と裏面側8の支持体2からなる複層構造6の形態については、弾性体4を着座者又は仰臥者が接する側の支持体2の1層目の裏面側のみに配置する。その配設形態として、図6(a)又は(b)に示すように、四角枠形状の支持体2に囲繞された範囲に柱状13の弾性体4を配設した形態もある。この場合には、下層の裏面側8には背面体30が配設される。 Next, regarding the form of the multilayer structure 6 in which the support body 2 is composed of the support body 2 on the front surface side 7 and the support body 2 on the back surface side 8, the support body 2 on the side where the seated person or the supine person contacts the elastic body 4. It arrange | positions only on the back surface side of the 1st layer. As an arrangement form thereof, as shown in FIG. 6 (a) or (b), there is a form in which the columnar elastic bodies 4 are arranged in a range surrounded by the support body 2 having a rectangular frame shape. In this case, a back body 30 is disposed on the lower back side 8 of the lower layer.

また、図7に示すように複層構造6の支持体2の両端から脚体3が延出する形態もある。表面側7の支持体2と裏面側8の支持体2からなる複層構造6で、裏面側8には空間5が形成される。そして、着座者又は仰臥者が接する側の支持体2の1層目の裏面側のみに配置する弾性体4の形態としては、図7(b)に示すように表面側7の支持体2と裏面側8の支持体2間に弾性体4を配設させる形態、図7(c)に示すように表面側7の支持体2と裏面側8の支持体2間に気体を密封した伸縮可能な素材からなる袋状体14や板状体の弾性体4を配設する形態等がある。 Further, as shown in FIG. 7, there is a form in which the legs 3 extend from both ends of the support 2 of the multilayer structure 6. A space 5 is formed on the back side 8 in the multilayer structure 6 composed of the support 2 on the front side 7 and the support 2 on the back side 8. And as a form of the elastic body 4 arrange | positioned only on the back surface side of the 1st layer of the support body 2 by the side where a seated person or a supine person contacts, as shown in FIG.7 (b), the support body 2 of the surface side 7 and A configuration in which the elastic body 4 is disposed between the support bodies 2 on the back surface side 8, and can be expanded and contracted with gas sealed between the support body 2 on the front surface side 7 and the support body 2 on the back surface side 8 as shown in FIG. For example, a bag-like body 14 made of a simple material or a plate-like elastic body 4 may be disposed.

さらに、図8に示すように弾性体4内に合成樹脂発泡体20を内在させてもよい。この形態の場合においても、合成樹脂発泡体20を内在させた弾性体4全体で、25%圧縮時の硬さが20〜600Nとなるようにする。内在させた合成樹脂発泡体20は、柱状、球状、立方体、直方体、円錐形等いずれの形態でもよい。内在させる前記合成樹脂発泡体20の形態、位置、数、大きさは、弾性体4の形態や大きさに応じて快適なクッション性が得られるように、適宜設ければよい。内在させる合成樹脂発泡体20によって、部分的に硬さの調整をすることができる Further, as shown in FIG. 8, the synthetic resin foam 20 may be included in the elastic body 4. Even in the case of this configuration, the entire elastic body 4 including the synthetic resin foam 20 is made to have a hardness at 20% compression of 20 to 600 N. The internal synthetic resin foam 20 may have any form such as a columnar shape, a spherical shape, a cubic shape, a rectangular parallelepiped shape, and a conical shape. What is necessary is just to provide suitably the form of the said synthetic resin foam 20 made to exist, a position, a number, and a magnitude | size so that comfortable cushioning properties may be obtained according to the form and magnitude | size of the elastic body 4. FIG. The hardness can be partially adjusted by the internal synthetic resin foam 20.

支持体2と弾性体4との形態はいずれの形態であっても、支持体2の曲げ変形する側に減衰性を有する弾性体4を配設しているので、着座者や仰臥者の荷重を支持体2の曲げ変形と弾性体4の圧縮変形とで支えるため、着座者や仰臥者の身体へ加えられる加速度に対してもより高い追従性とクッション性を発揮し、また、クッション体1上の不特定位置への重量物の衝突等に対しても弾性体4によって合成樹脂発泡体からなる支持体2の破損を防ぐことができる。 Regardless of the form of the support body 2 and the elastic body 4, the elastic body 4 having a damping property is disposed on the side of the support body 2 that is bent and deformed. Is supported by the bending deformation of the support body 2 and the compression deformation of the elastic body 4, thereby exhibiting higher followability and cushioning properties against acceleration applied to the body of the seated person or the supine person, and the cushion body 1. The elastic body 4 can prevent the support body 2 made of the synthetic resin foam from being damaged even when a heavy object collides with an unspecified position.

また、弾性体4内に、図9(a)に示すように孔21を設けたり、図9(b)に示すように空洞22を設ける。孔21は貫通孔であっても貫通していない孔であってもよい。弾性体4に孔21や空洞22を設けることにより、さらにきめ細かく弾性体4のクッション性を部分的に調整したり、通気性を向上させることができる。 Further, a hole 21 is provided in the elastic body 4 as shown in FIG. 9A, or a cavity 22 is provided as shown in FIG. 9B. The hole 21 may be a through hole or a hole that does not penetrate. By providing the holes 21 and the cavities 22 in the elastic body 4, the cushioning property of the elastic body 4 can be partially adjusted or the air permeability can be improved.

次に、図10に示すように、支持体2の表面側に弾性体4からなる層を形成させる。この形態の場合には、着座者又は仰臥者はクッション体1に接した瞬間はまず減衰性を有する弾性体4に当接するので、弾性体4の硬さを好ましくは20N〜250Nとした場合、接した瞬間から柔らかい感触のクッション性を感じることができる。 Next, as shown in FIG. 10, a layer made of the elastic body 4 is formed on the surface side of the support 2. In the case of this form, since the seated person or the supine person first contacts the elastic body 4 having a damping property at the moment of contact with the cushion body 1, when the hardness of the elastic body 4 is preferably 20N to 250N, You can feel the soft cushioning from the moment you touch.

次に、図12(a)又は(b)に示すように、支持体2間の間隙12に弾性体4を配設し、さらに弾性体4を支持体2の表面より突出させた形態がある。この場合は、棒状又は板状の支持体2の角を着座者又は仰臥者は違和感として感じにくくなる。 Next, as shown in FIG. 12 (a) or (b), there is a form in which the elastic body 4 is disposed in the gap 12 between the supports 2 and the elastic body 4 is further protruded from the surface of the support 2. . In this case, it becomes difficult for the seated person or the supine person to feel the corners of the rod-like or plate-like support 2 as an uncomfortable feeling.

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、JIS K7221−2:2006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6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体2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、着座者や仰臥者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 loaded up to a maximum of 90 mm at a distance between fulcrums of 6 and a test speed of 20 ± 1 mm / min, 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. 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 body 2 required to support the pressing by the body becomes very large and the load when bending 20 mm is less than 2N or more than 100N, a preferable amount of bending is generated by the load applied by the seated person or the supine person Both of them are difficult to design, and preferable design is difficult. 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、JIS K7161:1994(試験片:JIS K 7162(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、その後押圧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。 And in concrete 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 pressure is released and then the sample is deformed. Residual strain measured after the center portion of the sample that supported both ends was repeatedly pressed down and deformed in accordance with tests performed on materials with 90% or more recovery or conventional urethane foam seat cushions. A material in which is less than a predetermined amount is desirable. The predetermined number or the predetermined amount conforms to a specification arbitrarily determined by each manufacturer when selecting 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〜0.015g/cm、より好ましくは密度0.035g/cm〜0.015g/cm、又は発泡ポリエチレンの密度0.08g/cm〜0.03g/cmなどが好ましい。このような材料はJIS K7221−2:2006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6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、本発明のクッション体1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 of 300 mm at the fulcrum 6 and a load of up to 90 mm at a test speed of 20 ± 1 mm / min and recording a load deflection curve), the load when the bending deflection is 20 mm is 2 to 100 N and The flexible urethane foam, which is generally used for flexibility and flexural rigidity, on the other hand, 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 constituting 1.

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、JIS K 6767:1999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、シートクッション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 cushions, exhibits cushioning properties by compression deformation. If it is simply replaced with a synthetic resin foam, compression set is generated, and the original cushion It is shown that it is difficult to maintain the product and the commercial value is lowered.

1 クッション体
2 支持体
3 脚体
4 弾性体
5 空間
6 複層構造
7 表面側
8 裏面側
9 荷重
10 棒状
11 平板状
12 間隙
13 柱状
14 袋状体
20 合成樹脂発泡体
21 孔
22 空洞
30 背面体
31 フレーム
32 背面を支える部材
DESCRIPTION OF SYMBOLS 1 Cushion body 2 Support body 3 Leg body 4 Elastic body 5 Space 6 Multi-layer structure 7 Surface side 8 Back surface side 9 Load 10 Rod shape 11 Flat plate shape 12 Gap 13 Column shape 14 Bag shape body 20 Synthetic resin foam 21 Hole 22 Cavity 30 Back surface Body 31 Frame 32 Member that supports the back

Claims (9)

JIS K7221−2:2006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、着座者又は仰臥者の荷重を受けて曲げ変形する複数の棒状又は複数の平板状の支持体と、
前記支持体の裏面側に配設した、前記支持体の曲げ変形を可能とし、かつ着座者又は仰臥者の荷重による前記支持体の曲げ変形に対して圧縮変形して減衰性を有する弾性体と、を備えることを特徴とするクッション体。
Bending under the load of a seated person or a supine person consisting 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 pressure at the time of 20 mm deflection of 2 to 100 N A plurality of rod-shaped or plurality of flat-plate-shaped supports that are deformed;
An elastic body disposed on the back side of the support body, capable of bending deformation of the support body, and compressively deforming and attenuating against bending deformation of the support body due to a load of a seated person or a supine person; A cushion body comprising:
前記支持体と、クッション体の背面を形成する背面体との間に、前記弾性体を配設したことを特徴とする請求項1に記載のクッション体。   The cushion body according to claim 1, wherein the elastic body is disposed between the support body and a back body forming a back surface of the cushion body. 前記弾性体が、JIS K6400−2:2012に規定された25%圧縮時の硬さが20〜600Nであることを特徴とする請求項1又は2に記載のクッション体。   The cushion body according to claim 1 or 2, wherein the elastic body has a hardness at 25% compression of 20 to 600 N as defined in JIS K6400-2: 2012. 前記支持体が複層構造で、少なくとも着座者又は仰臥者が接する側の1層目の支持体の裏面側に前記弾性体を配設したことを特徴とする請求項1又は3に記載のクッション体。   The cushion according to claim 1 or 3, wherein the support has a multi-layer structure, and the elastic body is disposed on the back side of the first support on the side where the seated person or the supine is in contact. body. 前記弾性体が柱状体であることを特徴とする請求項1乃至4のいずれかに記載のクッション体。   The cushion body according to any one of claims 1 to 4, wherein the elastic body is a columnar body. 前記弾性体内に合成樹脂発泡体を内在させたことを特徴とする請求項1乃至5のいずれかに記載のクッション体。   The cushion body according to any one of claims 1 to 5, wherein a synthetic resin foam is contained in the elastic body. 前記弾性体内に、孔や空洞を設けたことを特徴とする請求項1乃至6のいずれかに記載のクッション体。   The cushion body according to any one of claims 1 to 6, wherein a hole or a cavity is provided in the elastic body. 前記支持体の表面を覆うように弾性体を覆設したことを特徴とする請求項1乃至7のいずれかに記載のクッション体。   The cushion body according to any one of claims 1 to 7, wherein an elastic body is provided so as to cover a surface of the support body. 複数の棒状又は複数の平板状の支持体間に設けた間隙から、前記支持体の裏面側に配設した弾性体を、前記支持体の表面より突出させたことを特徴とする請求項1乃至8のいずれかに記載のクッション体。   The elastic body disposed on the back side of the support body is protruded from the surface of the support body through gaps provided between a plurality of rod-like or flat plate-like support bodies. The cushion body according to any one of 8.
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