JP5729603B2

JP5729603B2 - Cushion structure

Info

Publication number: JP5729603B2
Application number: JP2011150283A
Authority: JP
Inventors: 英輝川原; 哲寛三浦; 悠歩内田; 真英羽生田
Original assignee: Aisin Seiki Co Ltd; Aisin Corp
Current assignee: Aisin Corp
Priority date: 2011-07-06
Filing date: 2011-07-06
Publication date: 2015-06-03
Anticipated expiration: 2031-07-06
Also published as: JP2013013671A

Description

本発明は、主弾性体に形成されている挿入穴に副弾性体を配置した構造のクッション構造体に関する。 The present invention relates to a cushion structure having a structure in which a secondary elastic body is disposed in an insertion hole formed in a main elastic body.

従来、主弾性体に形成されている挿入穴に副弾性体を配置した構造のクッション構造体が提供されている（特許文献１等）。このクッション構造体１Ｘは、図１１〜図１４に示すように、内壁側面２５Ｘで区画された複数の挿入穴２３Ｘをもつ発泡樹脂や発泡ゴム等の有機系弾性材料で形成され主弾性体２Ｘと、主弾性体２Ｘの挿入穴２３Ｘに配置された粘着性に富む樹脂やゴム等の有機系弾性材料で形成された副弾性体３Ｘとを備えている。 Conventionally, a cushion structure having a structure in which a secondary elastic body is disposed in an insertion hole formed in a main elastic body has been provided (Patent Document 1, etc.). As shown in FIGS. 11 to 14, the cushion structure 1 </ b> X is formed of an organic elastic material such as foamed resin or foamed rubber having a plurality of insertion holes 23 </ b> X partitioned by an inner wall side surface 25 </ b> X. And a secondary elastic body 3X made of an organic elastic material such as a resin or rubber having a high adhesive property and disposed in the insertion hole 23X of the main elastic body 2X.

図１１に示すように、主弾性体２Ｘは、副弾性体３Ｘを収容する複数の挿入穴２３Ｘをもつ本体２０Ｘと、本体２０Ｘの上面に接合させた上蓋２６Ｘと、本体２０Ｘの下面に接合された下蓋２７Ｘとを有する。副弾性体３Ｘは、主弾性体２Ｘに比較して異なる硬度および粘弾性を示す。このため、このクッション構造体１Ｘは、主弾性体２Ｘおよび副弾性体３Ｘによる複合的作用を利用でき、使用者に対して良好な複合的弾性感、感圧感、マッサージ効果を与えることができる。 As shown in FIG. 11, the main elastic body 2X is joined to the main body 20X having a plurality of insertion holes 23X for accommodating the sub-elastic body 3X, the upper lid 26X joined to the upper surface of the main body 20X, and the lower surface of the main body 20X. And a lower lid 27X. The secondary elastic body 3X exhibits different hardness and viscoelasticity compared to the main elastic body 2X. For this reason, this cushion structure 1X can utilize the composite action by the main elastic body 2X and the secondary elastic body 3X, and can give a favorable composite elastic feeling, pressure-sensitive feeling, and massage effect to the user.

特開２００６−２２３８３２号公報Japanese Unexamined Patent Publication No. 2006-223832

図１１は無負荷の状態の従来のクッション構造体１Ｘの内部構造を模式的に示す。図１２は、圧縮荷重が負荷された状態のクッション構造体１Ｘの内部構造を模式的に示す。図１３は、圧縮荷重が除かれつつある状態のクッション構造体１の内部構造を模式的に示す。図１２に示すように、使用者や物体などに基づく圧縮荷重がクッション構造体１Ｘに負荷されているときには、副弾性体３Ｘは、これらの厚み方向に圧潰されるように圧縮変形されているため、副弾性体３の外壁側面３３Ｘがこれの拡径方向（矢印Ｄ１０方向）に弾性変形する。このため、図１２に示すように、副弾性体３Ｘの外壁側面３３Ｘと挿入穴２３Ｘの内壁側面２５Ｘとが粘着を伴って互いに接触する。ここで、副弾性体３Ｘは、粘着性に富むため、上記接触の形態は、粘着を伴った接触となる。そして、圧縮荷重が解除されたときには、図１３に示すように、副弾性体３Ｘが求心方向（矢印Ｄ２０方向）に向かうように復元変形する。外壁側面３３Ｘは粘着性に富む。このため、主弾性体２Ｘの挿入穴２３Ｘの内壁側面２５Ｘと副弾性体３Ｘの外壁側面３３Ｘとが粘着を伴って接触しつつ、副弾性体３Ｘの外壁側面３３Ｘが求心方向（矢印Ｄ２０方向）に復元変形せんとする（図１３参照）。復元が進行すると、主弾性体２の内壁側面２５Ｘから、副弾性体３の外壁側面３３Ｘが剥離する（図１４参照）。 FIG. 11 schematically shows the internal structure of a conventional cushion structure 1X in an unloaded state. FIG. 12 schematically shows the internal structure of the cushion structure 1X in a state where a compressive load is applied. FIG. 13 schematically shows the internal structure of the cushion structure 1 in a state where the compressive load is being removed. As shown in FIG. 12, when a compressive load based on a user or an object is applied to the cushion structure 1X, the secondary elastic body 3X is compressed and deformed so as to be crushed in the thickness direction. The outer wall side surface 33X of the secondary elastic body 3 is elastically deformed in the diameter increasing direction (arrow D10 direction). For this reason, as shown in FIG. 12, the outer wall side surface 33X of the secondary elastic body 3X and the inner wall side surface 25X of the insertion hole 23X come into contact with each other with adhesion. Here, since the secondary elastic body 3X is rich in adhesiveness, the form of the contact is contact with adhesion. When the compressive load is released, as shown in FIG. 13, the secondary elastic body 3X is restored and deformed so as to be directed in the centripetal direction (arrow D20 direction). The outer wall side surface 33X is rich in adhesiveness. Therefore, the inner wall side surface 25X of the insertion hole 23X of the main elastic body 2X and the outer wall side surface 33X of the sub elastic body 3X are in contact with each other with adhesion, and the outer wall side surface 33X of the sub elastic body 3X is in the centripetal direction (arrow D20 direction). (Refer to FIG. 13). When the restoration proceeds, the outer wall side surface 33X of the sub elastic body 3 is peeled from the inner wall side surface 25X of the main elastic body 2 (see FIG. 14).

このようにクッション構造体１Ｘに圧縮荷重が負荷され、その後解除されるときには、外壁側面３３Ｘと内壁側面２５Ｘとの粘着を伴ない接触、更に、その後の復元変形に伴う剥離現象が繰り返される。クッション構造体１Ｘの実際の使用時には、荷重の負荷および荷重解除が頻繁に繰り返されるため、粘着を伴った接触、その後の剥離現象が頻繁に繰り返される。これは、副弾性体３Ｘの外壁側面３３Ｘにおける疲労による剥離を誘発させるおそれがある。この結果、クッション構造体１Ｘの使用期間が長くなると、副弾性体３Ｘの粘着性に富む外壁側面３３Ｘにおいて疲労による剥離３３０Ｘが発生するおそれがある（図１４参照）。この場合、クッション構造体１の本来のクッション機能にも影響を与えるおそれがある。なお、疲労による剥離３３０Ｘを抑制させるためには、上記した粘着を伴った接触、その後の剥離の現象を避けることが好ましい。このため、フィルムなどの被覆部材で副弾性体３Ｘを被覆する方策が考えられる。しかし、フィルムなどの被覆部材で副弾性体３Ｘを被覆するとしても、主弾性体２Ｘが曲成されるとき等において、副弾性体３Ｘが挿入穴２３Ｘから脱落するおそれがある。そこで、シート状の上蓋２６Ｘ，下蓋２７Ｘを蓋部材として主弾性体１０Ｘに被着させ、副弾性体３Ｘの脱落を抑えることにしている。 Thus, when a compressive load is applied to the cushion structure 1X and then released, the contact between the outer wall side surface 33X and the inner wall side surface 25X is accompanied by adhesion, and further, the peeling phenomenon associated with subsequent deformation is repeated. During actual use of the cushion structure 1X, load application and load release are frequently repeated, so that contact with adhesion and subsequent peeling phenomenon are frequently repeated. This may cause separation due to fatigue on the outer wall side surface 33X of the secondary elastic body 3X. As a result, when the use period of the cushion structure 1X becomes longer, there is a risk that peeling 330X due to fatigue may occur on the outer wall side surface 33X rich in the adhesiveness of the sub-elastic body 3X (see FIG. 14). In this case, the original cushion function of the cushion structure 1 may be affected. In addition, in order to suppress the peeling 330X due to fatigue, it is preferable to avoid the phenomenon of contact with adhesion described above and subsequent peeling. For this reason, a measure for covering the secondary elastic body 3X with a covering member such as a film is conceivable. However, even if the secondary elastic body 3X is covered with a covering member such as a film, the secondary elastic body 3X may fall out of the insertion hole 23X when the main elastic body 2X is bent. In view of this, the sheet-like upper lid 26X and lower lid 27X are attached to the main elastic body 10X as lid members to prevent the sub-elastic body 3X from falling off.

本発明は上記した実情に鑑みてなされたものであり、粘着を伴った接着およびその後の剥離に起因する副弾性体の外壁側面における疲労による剥離を抑制させつつ、副弾性体が主弾性体の挿入穴から脱落するおそれを改善させるのに有利なクッション構造体を提供することを課題とする。 The present invention has been made in view of the above-described situation, and while suppressing the peeling due to fatigue on the outer wall side surface of the secondary elastic body due to adhesion accompanied by adhesion and subsequent peeling, the secondary elastic body is the main elastic body. It is an object of the present invention to provide a cushion structure that is advantageous in improving the possibility of falling out of an insertion hole.

（１）本発明の様相１に係るクッション構造体は、（i）内壁側面で区画され且つ厚み方向の少なくとも一方側に開口を備える複数の挿入穴を有する有機系弾性材料で形成された主弾性体と、（ii）主弾性体の挿入穴に配置され、挿入穴の内壁側面に対面する外壁側面をもち且つ粘着性を有する有機系弾性材料で形成された副弾性体と、（iii）副弾性体のうち少なくとも外壁側面を被覆する伸縮可能な被覆部材とを具備しており、（iv）挿入穴の内壁側面と被覆部材の外面との間における接着剤層または摩擦力により、副弾性体は挿入穴に保持されている。 (1) The cushion structure according to the aspect 1 of the present invention is (i) a main elasticity formed of an organic elastic material having a plurality of insertion holes that are partitioned by an inner wall side surface and have an opening on at least one side in the thickness direction. A body, and (ii) a sub-elastic body that is disposed in the insertion hole of the main elastic body and has an outer wall side surface facing the inner wall side surface of the insertion hole and formed of an organic elastic material having adhesiveness; A stretchable covering member covering at least an outer wall side surface of the elastic body, and (iv) a secondary elastic body by an adhesive layer or a frictional force between the inner wall side surface of the insertion hole and the outer surface of the covering member Is held in the insertion hole.

主弾性体は、有機系弾性材料で形成されており、内壁側面で区画された複数の挿入穴をもつ。副弾性体は、粘着性を有する有機系弾性材料で形成されている。副弾性体は被覆部材で被覆された状態で、主弾性体の挿入穴に配置されている。被覆部材は、伸縮可能な材料で形成されており、副弾性体のうち少なくとも外壁側面を被覆する。これにより粘着性をもつ副弾性体を挿入穴に組み付けて配置させる作業性が向上する。更に、挿入穴の内壁側面と被覆部材の外面との間における接着剤層または摩擦力により、副弾性体は挿入穴から脱落しないように主弾性体に保持される。 The main elastic body is formed of an organic elastic material, and has a plurality of insertion holes defined on the side surface of the inner wall. The secondary elastic body is formed of an organic elastic material having adhesiveness. The secondary elastic body is disposed in the insertion hole of the main elastic body in a state of being covered with the covering member. The covering member is made of a stretchable material and covers at least the outer wall side surface of the auxiliary elastic body. Thereby, the workability of assembling and arranging the auxiliary elastic body having adhesiveness in the insertion hole is improved. Further, the secondary elastic body is held by the main elastic body so as not to drop out of the insertion hole due to an adhesive layer or a frictional force between the inner wall side surface of the insertion hole and the outer surface of the covering member.

更に、被覆部材は、副弾性体のうち少なくとも外壁側面を被覆しているため、被覆部材は、基本的には、副弾性体のうちの外壁側面に密着している状態となる。副弾性体は粘着性を有するため、粘着性によって、被覆部材は副弾性体のうちの外壁側面に常に密着している状態となり易い。従って、上記した粘着を伴った接触、その後の剥離の現象を避けるのに有利となる。このため副弾性体の外壁側面における疲労による剥離が効果的に抑えられる。また被覆部材は伸縮性を有するため、副弾性体の弾性変形に追従でき、副弾性体の固有の弾性変形性を損なうおそれが改善される。 Furthermore, since the covering member covers at least the outer wall side surface of the auxiliary elastic body, the covering member is basically in close contact with the outer wall side surface of the auxiliary elastic body. Since the secondary elastic body has adhesiveness, the covering member tends to be in close contact with the outer wall side surface of the secondary elastic body due to the adhesiveness. Therefore, it is advantageous to avoid the contact with the above-mentioned adhesion and the phenomenon of subsequent peeling. For this reason, peeling due to fatigue on the outer wall side surface of the secondary elastic body is effectively suppressed. In addition, since the covering member has stretchability, it can follow the elastic deformation of the secondary elastic body, and the possibility of impairing the inherent elastic deformation of the secondary elastic body is improved.

（２）本発明の様相２に係るクッション構造体によれば、上記した様相において、被覆部材の伸縮率は常温領域において１２０％以上である。このように被覆部材は高い伸縮性を有するため、副弾性体の弾性変形に追従でき、副弾性体の固有の弾性変形性を損なうおそれが抑えられる。伸縮前の長さ寸法をＬとし、伸縮前後の伸び量または縮み量をΔＬとすると、伸縮率は（ΔＬ／Ｌ）×１００％を意味する。ΔＬは絶対値として表される。伸縮率は副弾性体の弾性変形に追従できれば良い。伸縮率は例えば１５０％以上、１８０％以上、２００％以上にできる。伸縮率の上限としては特に規定されない。 (2) According to the cushion structure according to aspect 2 of the present invention, in the above aspect, the expansion / contraction rate of the covering member is 120% or more in the normal temperature region. Thus, since the covering member has high stretchability, it can follow the elastic deformation of the secondary elastic body, and the possibility of impairing the inherent elastic deformation of the secondary elastic body is suppressed. If the length dimension before expansion / contraction is L and the amount of expansion or contraction before and after expansion / contraction is ΔL, the expansion / contraction rate means (ΔL / L) × 100%. ΔL is expressed as an absolute value. The expansion / contraction rate should just follow the elastic deformation of a subelastic body. The expansion / contraction rate can be, for example, 150% or more, 180% or more, or 200% or more. The upper limit of the expansion / contraction rate is not particularly specified.

（３）本発明の様相３に係るクッション構造体によれば、上記した様相において、副弾性体の外壁側面と被覆部材の内面とは、副弾性体が有する粘着性により貼り合わされており、接着剤層により接着されていない。この場合、副弾性体の外壁側面と被覆部材の内面とは、副弾性体が有する粘着性により貼り合わされているものの、接着剤層により接着されていないため、被覆部材が副弾性体の弾性変形を拘束させる拘束力は、接着剤層に比較して相対的に低い。このため、副弾性体の固有の弾性変形性を損なうおそれが抑えられる。 (3) According to the cushion structure body according to aspect 3 of the present invention, in the above-described aspect, the outer wall side surface of the secondary elastic body and the inner surface of the covering member are bonded to each other due to the adhesive property of the secondary elastic body. It is not bonded by the agent layer. In this case, the outer wall side surface of the secondary elastic body and the inner surface of the covering member are bonded together by the adhesive property of the secondary elastic body, but are not bonded by the adhesive layer, so that the covering member is elastically deformed by the secondary elastic body. The restraining force for restraining is relatively low compared to the adhesive layer. For this reason, the possibility of impairing the inherent elastic deformability of the secondary elastic body can be suppressed.

（４）本発明の様相４に係るクッション構造体によれば、上記した様相において、主弾性体は、厚み方向の双方側に開口を備える複数の挿入穴をもつ本体と、本体の挿入穴のうち一方の開口を主弾性体において露出させつつ他方の開口を塞ぐように本体に接合されている第１蓋弾性体とを具備する。第１蓋弾性体が他方の開口を塞いでいるため、他方の開口は主弾性体において露出せず、従って、副弾性体は挿入穴の他方の開口から脱落しない。但し、挿入穴のうち一方の開口は主弾性体において露出されている。しかし、挿入穴の内壁側面と被覆部材の外面との間における接着剤または摩擦力により、副弾性体は保持されている。従って、副弾性体は、挿入穴のうち主弾性体において露出している一方の開口から脱落しない。このため、一方の開口を閉鎖する蓋弾性体を廃止でき、コスト低減を図り得る。 (4) According to the cushion structure according to aspect 4 of the present invention, in the above aspect, the main elastic body includes a main body having a plurality of insertion holes having openings on both sides in the thickness direction, and an insertion hole of the main body. And a first lid elastic body that is joined to the main body so as to close the other opening while exposing one of the openings in the main elastic body. Since the first lid elastic body blocks the other opening, the other opening is not exposed in the main elastic body, and therefore, the secondary elastic body does not fall off the other opening of the insertion hole. However, one opening of the insertion hole is exposed in the main elastic body. However, the secondary elastic body is held by an adhesive or a frictional force between the inner wall side surface of the insertion hole and the outer surface of the covering member. Therefore, the auxiliary elastic body does not fall out of one opening of the insertion hole exposed in the main elastic body. For this reason, the cover elastic body which closes one opening can be abolished, and cost reduction can be aimed at.

（５）本発明の様相５に係るクッション構造体によれば、上記した様相において、主弾性体はこれの厚み方向の双方側に露出する開口をそれぞれ備えており、被覆部材は開口から露出している。挿入穴の内壁側面と被覆部材の外面との間における接着剤または摩擦力により、副弾性体は保持されている。従って副弾性体は挿入穴の開口から脱落しないように保持される。双方の開口を閉鎖する蓋弾性体を廃止でき、コスト低減を図り得る。 (5) According to the cushion structure according to aspect 5 of the present invention, in the above aspect, the main elastic body has openings exposed on both sides in the thickness direction, and the covering member is exposed from the opening. ing. The secondary elastic body is held by an adhesive or a frictional force between the inner wall side surface of the insertion hole and the outer surface of the covering member. Therefore, the auxiliary elastic body is held so as not to fall off from the opening of the insertion hole. The lid elastic body that closes both openings can be eliminated, and the cost can be reduced.

本発明によれば、被覆部材は、伸縮可能な有機系発泡材料で形成されており、副弾性体のうち少なくとも外壁側面を被覆しており、粘着性をもつ副弾性体を組み付ける作業性が向上する。更に、挿入穴の内壁側面と被覆部材の外面との間における接着剤層または摩擦力により、副弾性体は挿入穴から脱落しないように主弾性体に保持される。 According to the present invention, the covering member is formed of a stretchable organic foam material, covers at least the outer wall side surface of the secondary elastic body, and improves workability for assembling the secondary elastic body having adhesiveness. To do. Further, the secondary elastic body is held by the main elastic body so as not to drop out of the insertion hole due to an adhesive layer or a frictional force between the inner wall side surface of the insertion hole and the outer surface of the covering member.

更に本発明によれば、被覆部材は、副弾性体のうち少なくとも外壁側面を被覆しているため、上記した粘着を伴った接触、その後の剥離が頻繁に発生することを避けることができる。このため副弾性体の外壁側面における疲労に起因する疲労による剥離が抑えられる。また被覆部材は伸縮性を有するため、副弾性体の弾性変形に追従でき、副弾性体の固有の弾性変形性を損なうおそれが改善される。 Further, according to the present invention, since the covering member covers at least the outer wall side surface of the sub-elastic body, it is possible to avoid frequent occurrence of contact with the above-described adhesion and subsequent peeling. For this reason, the peeling by the fatigue resulting from the fatigue in the outer wall side surface of a subelastic body is suppressed. In addition, since the covering member has stretchability, it can follow the elastic deformation of the secondary elastic body, and the possibility of impairing the inherent elastic deformation of the secondary elastic body is improved.

実施形態１に係るクッション構造体の概念を模式的に示す断面図である。It is sectional drawing which shows the concept of the cushion structure which concerns on Embodiment 1 typically. 無負荷状態におけるクッション構造体の概念を模式的に示す断面図である。It is sectional drawing which shows typically the concept of the cushion structure in an unloaded state. 圧縮荷重を負荷した状態におけるクッション構造体の概念を模式的に示す断面図である。It is sectional drawing which shows typically the concept of the cushion structure in the state which loaded the compressive load. クッション構造体を模式的に示す底面図である。It is a bottom view which shows a cushion structure typically. 副弾性体を形成するエラストマの一例にかかる荷重−変位特性を示すグラフである。It is a graph which shows the load-displacement characteristic concerning an example of the elastomer which forms a subelastic body. 実施形態２に係り、クッション構造体の概念を模式的に示す断面図である。It is sectional drawing which concerns on Embodiment 2 and shows the concept of a cushion structure typically. 実施形態３に係り、クッション構造体の概念を模式的に示す断面図である。It is sectional drawing which concerns on Embodiment 3 and shows the concept of a cushion structure typically. 実施形態４に係り、クッション構造体の概念を模式的に示す断面図である。It is sectional drawing which concerns on Embodiment 4 and shows the concept of a cushion structure typically. 実施形態５に係り、クッション構造体の概念を模式的に示す断面図である。It is sectional drawing which concerns on Embodiment 5 and shows the concept of a cushion structure typically. 実施形態６に係り、クッション構造体の概念を模式的に示す断面図である。It is sectional drawing which concerns on Embodiment 6 and shows the concept of a cushion structure typically. 従来技術に係り、無負荷状態におけるクッション構造体の概念を模式的に示す断面図である。It is sectional drawing which concerns on a prior art, and shows typically the concept of the cushion structure in a no-load state. 従来技術に係り、荷重を負荷した状態におけるクッション構造体の概念を模式的に示す断面図である。It is sectional drawing which concerns on a prior art and shows typically the concept of the cushion structure in the state which loaded load. 従来技術に係り、荷重を解除した状態におけるクッション構造体の概念を模式的に示す断面図である。It is sectional drawing which shows typically the concept of the cushion structure in a state which canceled the load concerning the prior art. 従来技術に係り、副弾性体の外壁側面に疲労による剥離が発生したクッション構造体の概念を模式的に示す断面図である。It is sectional drawing which concerns on a prior art, and shows typically the concept of the cushion structure in which peeling by fatigue generate | occur | produced on the outer wall side surface of the subelastic body.

（実施形態１）
以下、本発明の実施形態１について図１〜図４を参照して説明する。図１に示すように、本実施形態に係るクッション構造体１は、人体または物体を支えるものでもよく、マットレス、座布団、枕、着座シート、椅子、背もたれ等に使用できる。クッション構造体１は、クッション構造体１のうち大きな容積を占めるシート状の主弾性体２と、主弾性体２に対して複合化特性を示す複数の副弾性体３とを有する。主弾性体２は、有機系弾性材料として機能する多孔質の発泡弾性材料（例えばウレタンフォーム）で形成されており、内周壁面を形成する円筒形状の内壁側面２５で区画された複数の挿入穴２３をもつ。各挿入穴２３はそれぞれ中心線２４とをもつ。具体的には、図１に示すように、主弾性体２は、有機系弾性材料として機能する多孔質の発泡弾性材料（例えばウレタンフォーム）で形成されたシート状の本体２０と、有機系弾性材料として機能する多孔質の発泡弾性材料（例えばウレタンフォーム）で形成されたシート状の蓋弾性体２６とを有する。本体２０は、内壁側面２５で区画された複数の挿入穴２３と、互いに対向する二つの第１表面２１，第２表面２２とをもつ。図１に示すように、挿入穴２３は、本体２０の厚み方向の一方側の開口２３ａと、本体２０の厚み方向の他方側の開口２３ｃとを有する。開口２３ａ，２３ｃは円形状をなす。蓋弾性体２６は、本体２０の第１表面２２（下面）に接着剤層２６ｍを介して接着されている。なお、本体２０および蓋弾性体２６は、同一または同系の多孔質の発泡弾性材料（例えばウレタンフォーム等の有機系発泡材料）で形成されていることが好ましい。同一または同系の発泡弾性材料であれば、本体２０および蓋弾性体２６の接合性を高め得る。但し、本体２０および蓋弾性体２６は、異なる発泡弾性材料で形成されていても良く、要するにクッション性を有すれば良い。 (Embodiment 1)
Embodiment 1 of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the cushion structure 1 according to the present embodiment may support a human body or an object, and can be used for a mattress, a cushion, a pillow, a seat, a chair, a backrest, and the like. The cushion structure 1 includes a sheet-like main elastic body 2 that occupies a large volume of the cushion structure 1 and a plurality of sub-elastic bodies 3 that exhibit composite characteristics with respect to the main elastic body 2. The main elastic body 2 is formed of a porous foamed elastic material (for example, urethane foam) that functions as an organic elastic material, and has a plurality of insertion holes defined by a cylindrical inner wall side surface 25 that forms an inner peripheral wall surface. 23. Each insertion hole 23 has a center line 24. Specifically, as shown in FIG. 1, the main elastic body 2 includes a sheet-like main body 20 formed of a porous foamed elastic material (for example, urethane foam) that functions as an organic elastic material, and an organic elastic material. And a sheet-like lid elastic body 26 formed of a porous foamed elastic material (for example, urethane foam) that functions as a material. The main body 20 has a plurality of insertion holes 23 defined by an inner wall side surface 25 and two first and second surfaces 21 and 22 that face each other. As shown in FIG. 1, the insertion hole 23 has an opening 23 a on one side in the thickness direction of the main body 20 and an opening 23 c on the other side in the thickness direction of the main body 20. The openings 23a and 23c are circular. The lid elastic body 26 is bonded to the first surface 22 (lower surface) of the main body 20 via an adhesive layer 26m. The main body 20 and the lid elastic body 26 are preferably formed of the same or similar porous foamed elastic material (for example, an organic foamed material such as urethane foam). If the same or similar foamed elastic material is used, the bondability between the main body 20 and the lid elastic body 26 can be improved. However, the main body 20 and the lid elastic body 26 may be formed of different foamed elastic materials, and only need to have cushioning properties.

副弾性体３は、粘弾性に富む有機系弾性材料（例えばエラストマ）で形成されており、オイル等の液状物を含有する。このような副弾性体３は、主弾性体２に対して異なる硬度および弾性特性をもち、主弾性体２よりも軟質であり、液状物を含有するため、流動変形性に富む。このため、クッション構造体１の複合構造化を図り得る。すなわち、本実施形態のクッション構造体１は、広い投影面積をもつ主弾性体２と小さな投影面積をもつ副弾性体３の双方の特性をそれぞれ複合的に発揮でき、使用者や物体等に対して良好な複合的弾性感、感圧感、マッサージ効果を与えることができる。副弾性体３は円柱形状をなしており、平坦な第１端面３１（例えば上面）、平坦な第２端面３２（例えば下面）、円筒形状をなす外壁側面３３（外周壁面）を有する。なお、副弾性体３の第２端面３２は、蓋弾性体２６に接着されて固定されていても良いし、あるいは、副弾性体３の自由変形性を高めるように接着されていなくても良い。 The secondary elastic body 3 is made of an organic elastic material (eg, elastomer) rich in viscoelasticity and contains a liquid material such as oil. Such a secondary elastic body 3 has hardness and elasticity characteristics different from those of the main elastic body 2, is softer than the main elastic body 2, and contains a liquid material, and thus has high flow deformability. For this reason, the composite structure of the cushion structure 1 can be achieved. That is, the cushion structure 1 of this embodiment can exhibit both the characteristics of the main elastic body 2 having a large projected area and the sub-elastic body 3 having a small projected area, respectively. Can provide a good composite elasticity, pressure sensitivity and massage effect. The secondary elastic body 3 has a columnar shape, and has a flat first end surface 31 (for example, an upper surface), a flat second end surface 32 (for example, a lower surface), and a cylindrical outer wall side surface 33 (an outer peripheral wall surface). The second end surface 32 of the secondary elastic body 3 may be bonded and fixed to the lid elastic body 26 or may not be bonded so as to enhance the free deformation of the secondary elastic body 3. .

被覆部材７は可撓性および伸縮性をもつ多孔質の材料、特に有機系発泡材料（発泡樹脂または発泡ゴム）で形成されており、副弾性体３の第１端面３１および外壁側面３３を被覆している。但し、図１から理解できるように、副弾性体３の脱落を抑制できる第１蓋弾性体２６は、本体２０の第２表面２２（例えば下面）に接着されて固定されている。このため、蓋弾性体２６に対面する第２端面３２は、被覆部材７で被覆されていない。単数の被覆部材７は単数の副弾性体３を被覆する。図１に示すように、被覆部材７は、副弾性体３の外壁側面３３に密着しつつこれを被覆する円筒形状をなす側部７０と、副弾性体３の第１端面３１に密着しつつこれを被覆する中間部７１とを有する。なお、被覆部材７は、側部７０および中間部７１を有する円筒形状に予め成形されていても良いし、あるいは、被覆部材７を副弾性体３に被覆させるとき、側部７０および中間部７１を曲成させても良い。クッション構造体１の用途および種類、挿入穴２３のサイズ等にもよるが、被覆部材７の平均厚みｔは０．２〜３０ミリメートル、０．５〜２０ミリメートルが好ましい。副弾性体３の外径寸法をＤとするとき、被覆部材７の平均厚みｔは例えばＤ／２〜Ｄ／２０程度にできる。但しこれに限定されるものではない。被覆部材７は伸縮可能であり、その伸縮率は常温において、１５０％以上、１８０％以上、場合によっては２００％以上、２５０％以上とされている。 The covering member 7 is formed of a flexible and stretchable porous material, particularly an organic foam material (foamed resin or foamed rubber), and covers the first end face 31 and the outer wall side face 33 of the secondary elastic body 3. doing. However, as can be understood from FIG. 1, the first lid elastic body 26 capable of suppressing the dropout of the secondary elastic body 3 is bonded and fixed to the second surface 22 (for example, the lower surface) of the main body 20. For this reason, the second end face 32 facing the lid elastic body 26 is not covered with the covering member 7. The single covering member 7 covers the single auxiliary elastic body 3. As shown in FIG. 1, the covering member 7 is in close contact with the outer wall side surface 33 of the secondary elastic body 3 and in a cylindrical shape to cover the side wall 70 covering the outer wall side surface 33 and the first end surface 31 of the secondary elastic body 3. And an intermediate portion 71 covering the same. The covering member 7 may be formed in a cylindrical shape having the side portion 70 and the intermediate portion 71 in advance, or when the covering member 7 is covered with the secondary elastic body 3, the side portion 70 and the intermediate portion 71. May be composed. Although depending on the use and type of the cushion structure 1 and the size of the insertion hole 23, the average thickness t of the covering member 7 is preferably 0.2 to 30 millimeters and 0.5 to 20 millimeters. When the outer diameter of the secondary elastic body 3 is D, the average thickness t of the covering member 7 can be, for example, about D / 2 to D / 20. However, it is not limited to this. The covering member 7 can be expanded and contracted, and the expansion / contraction rate is 150% or more and 180% or more, and 200% or more and 250% or more in some cases.

副弾性体３を主弾性体２に組み付けるには、被覆部材７を副弾性体３に被覆させると共に、被覆部材７のうち側部７１の外面７ｐのみに接着剤を塗布する。あるいは、挿入穴２３の内壁側面２５のみに接着剤を塗布しても良い。あるいは、被覆部材７の側部７１の外面７ｐに接着剤を塗布すると共に、挿入穴２３の内壁側面２５に接着剤を塗布しても良い。この状態で、被覆部材７で被覆された副弾性体３が挿入穴２３に挿入される。被覆部材７が多孔質性であるため、接着剤の含浸性が確保される。組付作業性を考慮すると、被覆部材７をこれの厚み方向にやや小さくさせた状態で挿入穴２３に挿入させることが好ましい。このように挿入すれば、被覆部材７の側部７０が厚み方向に復元するため、被覆部材７の外面７ｐと挿入穴２３の内壁側面２５とが接着剤層２９により接着される。被覆部材７は多孔質であり、可撓性および圧縮変形性に富むため、挿入作業は改善される。接着剤層２９が固化すれば、被覆部材７で被覆された副弾性体３は本体２０の挿入穴２３に強固に保持される。よって、挿入穴２３から副弾性体３が脱落することが防止される。 In order to assemble the sub elastic body 3 to the main elastic body 2, the covering member 7 is covered with the sub elastic body 3, and an adhesive is applied only to the outer surface 7 p of the side portion 71 of the covering member 7. Alternatively, an adhesive may be applied only to the inner wall side surface 25 of the insertion hole 23. Alternatively, an adhesive may be applied to the outer surface 7 p of the side portion 71 of the covering member 7 and an adhesive may be applied to the inner wall side surface 25 of the insertion hole 23. In this state, the secondary elastic body 3 covered with the covering member 7 is inserted into the insertion hole 23. Since the covering member 7 is porous, the impregnation property of the adhesive is ensured. Considering assembly workability, it is preferable to insert the covering member 7 into the insertion hole 23 in a state where the covering member 7 is slightly reduced in the thickness direction. When inserted in this manner, the side portion 70 of the covering member 7 is restored in the thickness direction, and thus the outer surface 7 p of the covering member 7 and the inner wall side surface 25 of the insertion hole 23 are bonded by the adhesive layer 29. Since the covering member 7 is porous and rich in flexibility and compression deformability, the insertion operation is improved. If the adhesive layer 29 is solidified, the secondary elastic body 3 covered with the covering member 7 is firmly held in the insertion hole 23 of the main body 20. Therefore, the secondary elastic body 3 is prevented from dropping from the insertion hole 23.

図１に示すように、被覆部材７は副弾性体３を被覆しているため、被覆部材７は、副弾性体３のうちの外壁側面３３に密着する状態となる。殊に、副弾性体３は粘着性を有するため、粘着性によっても、被覆部材７の側部７０の内面７ｉは副弾性体３の外壁側面３３に密着しつつ貼り合わされている状態となる。この場合、被覆部材７の側部７０の内面７ｉと副弾性体３の外壁側面３３との間には、隙間は実質的に形成されていない。従って、副弾性体３が復元変形するとき、副弾性体３の外壁側面３３において、従来技術で発生していた上記した粘着を伴った接触、その後の剥離の現象を避けるのに有利となる。ひいては、外壁側面３３における疲労による剥離が抑えられ、副弾性体３の長寿命化を図り得る。 As shown in FIG. 1, since the covering member 7 covers the secondary elastic body 3, the covering member 7 is in close contact with the outer wall side surface 33 of the secondary elastic body 3. In particular, since the secondary elastic body 3 has adhesiveness, the inner surface 7 i of the side portion 70 of the covering member 7 is adhered to the outer wall side surface 33 of the secondary elastic body 3 in close contact with the adhesive. In this case, a gap is not substantially formed between the inner surface 7 i of the side portion 70 of the covering member 7 and the outer wall side surface 33 of the auxiliary elastic body 3. Therefore, when the secondary elastic body 3 is restored and deformed, the outer wall side surface 33 of the secondary elastic body 3 is advantageous in avoiding the contact with the above-described adhesion, which has occurred in the prior art, and the subsequent peeling phenomenon. As a result, peeling due to fatigue on the outer wall side surface 33 is suppressed, and the life of the secondary elastic body 3 can be extended.

更に図１から理解できるように、被覆部材７の中間部７１は、副弾性体３のうちの第１端面３１の粘着性により第１端面３１に粘着を伴って接触する状態となる。即ち、副弾性体３は粘着性を有するため、被覆部材７の中間部７１の内面７ｉは副弾性体３の第１端面３１に常に貼り合わされている状態となる。この場合、中間部７１の内面７ｉと副弾性体３の第１端面３１との間についても、隙間は実質的に形成されていない。従って、副弾性体３の第１端面３１においても、上記した粘着を伴った接触、その後の剥離の現象を避けるのに有利となり、第１端面３１における疲労による剥離が抑えられる。この意味においても、副弾性体３の長寿命化を図り得る。 Further, as can be understood from FIG. 1, the intermediate portion 71 of the covering member 7 comes into contact with the first end surface 31 with adhesion due to the adhesiveness of the first end surface 31 of the auxiliary elastic body 3. That is, since the secondary elastic body 3 has adhesiveness, the inner surface 7 i of the intermediate portion 71 of the covering member 7 is always stuck to the first end surface 31 of the secondary elastic body 3. In this case, no gap is substantially formed between the inner surface 7 i of the intermediate portion 71 and the first end surface 31 of the auxiliary elastic body 3. Therefore, the first end surface 31 of the sub-elastic body 3 is also advantageous in avoiding the above-described contact with adhesion and subsequent peeling, and the first end surface 31 can be prevented from peeling due to fatigue. Also in this sense, the life of the secondary elastic body 3 can be extended.

なお、副弾性体３の外壁側面３３と被覆部材７の内面７ｉとは、副弾性体３が有する粘着性により貼り合わされているものの、接着剤層により接着されていない。粘着による拘束力は、接着剤層による拘束力ほど強固ではない、故に、副弾性体３が変形するとき、副弾性体３の外壁側面３３の固有の弾性変形を損なうことが抑制される。また被覆部材７は高い伸縮性を有するため、副弾性体３の弾性変形量が大きくても被覆部材７はその変形に追従でき、副弾性体３の固有の弾性変形性を損なうおそれが改善される。 Note that the outer wall side surface 33 of the secondary elastic body 3 and the inner surface 7i of the covering member 7 are bonded together by the adhesive property of the secondary elastic body 3, but are not bonded by the adhesive layer. The restraining force due to the adhesive is not as strong as the restraining force due to the adhesive layer. Therefore, when the secondary elastic body 3 is deformed, the inherent elastic deformation of the outer wall side surface 33 of the secondary elastic body 3 is suppressed. Further, since the covering member 7 has high stretchability, the covering member 7 can follow the deformation even when the elastic deformation amount of the secondary elastic body 3 is large, and the possibility of impairing the inherent elastic deformability of the secondary elastic body 3 is improved. The

なお、図４は、主弾性体２の蓋弾性体２６側から蓋弾性体２６に対して垂直方向に視認した底面視を示す。図１に示すように、副弾性体３は主弾性体２の挿入穴２３に個別に配置された状態で、蓋弾性体２６により閉蓋されている。単数の挿入穴２３に当たり、単数の副弾性体３が収容されている。 4 shows a bottom view of the main elastic body 2 viewed from the lid elastic body 26 side in a direction perpendicular to the lid elastic body 26. FIG. As shown in FIG. 1, the secondary elastic body 3 is closed by a lid elastic body 26 in a state of being individually disposed in the insertion hole 23 of the main elastic body 2. The single auxiliary elastic body 3 is accommodated in the single insertion hole 23.

図１に示すように、副弾性体３の第１端面３１は、被覆部材７の中間部７１と共に本体２０の第１表面２１から露出しつつ突出している。第１端面３１の突出量はΔｈ１として示される。中間部７１の突出量はΔｈ２として示される。これによりクッション構造体１に圧縮荷重が負荷されるとき、副弾性体３は優先的に弾性変形でき、その固有のクッション機能を発揮させ易い。使用時には、表皮部材１００がクッション構造体１に被覆されることが好ましい。但し表皮部材１００を被覆しないで、クッション構造体１を使用することもできる。 As shown in FIG. 1, the first end surface 31 of the secondary elastic body 3 protrudes while being exposed from the first surface 21 of the main body 20 together with the intermediate portion 71 of the covering member 7. The protrusion amount of the first end face 31 is shown as Δh1. The protruding amount of the intermediate portion 71 is indicated as Δh2. As a result, when a compressive load is applied to the cushion structure 1, the secondary elastic body 3 can be preferentially elastically deformed and can easily exhibit its inherent cushion function. In use, the skin member 100 is preferably covered with the cushion structure 1. However, the cushion structure 1 can be used without covering the skin member 100.

更に説明を加える。図２は、無負荷状態のクッション構造体１の単数の副弾性体３付近における内部構造を模式的に示す。図２に示すように、無負荷状態では、副弾性体３の本来の円柱形状を維持しており、被覆部材７の側部７０の外面７ｐは、挿入穴２３の内壁側面２５に接着剤層２９により接着されている。図３は、クッション構造体１の単数の副弾性体３付近に圧縮荷重を負荷した状態を模式的に示す。図３に示すように、圧縮荷重がクッション構造体１に作用する。このため主弾性体２および副弾性体３が圧縮変形する。図３に示すように、特に、本体２０の第１表面２１よりも突出する副弾性体３が圧潰するように圧縮変形し、副弾性体３の外壁側面３３が拡径方向（矢印Ｄ１方向）に被覆部材７と共に膨出を伴って弾性変形する。被覆部材７は伸縮性に富むため、副弾性体３の変形に追従できる。副弾性体３の外壁側面３３は粘着性に富む。このため、図３に示すように、副弾性体３のうち拡径方向（矢印Ｄ２方向）に膨出した外壁側面３３は、被覆部材７を適宜伸縮させつつ、被覆部材７の内面７ｉと粘着を伴って接触し続ける。このため被覆部材７と副弾性体３との剥離が抑えられる。圧縮荷重が解除されるときには、図２に示すように、副弾性体３は元の形状に被覆部材７と共に復帰する。このとき、被覆部材７は伸縮性に富むため、副弾性体３の復帰変形に容易に追従できる。復元変形時においても、被覆部材７の側部７０の内面７ｉは副弾性体３の外壁側面３３に粘着性により密着しており、両者の間には隙間は実質的に形成されていない。 Further explanation will be added. FIG. 2 schematically shows the internal structure in the vicinity of the single subelastic body 3 of the cushion structure 1 in an unloaded state. As shown in FIG. 2, the original cylindrical shape of the secondary elastic body 3 is maintained in the no-load state, and the outer surface 7 p of the side portion 70 of the covering member 7 is bonded to the inner wall side surface 25 of the insertion hole 23. 29 is adhered. FIG. 3 schematically shows a state in which a compressive load is applied in the vicinity of the single sub-elastic body 3 of the cushion structure 1. As shown in FIG. 3, a compressive load acts on the cushion structure 1. For this reason, the main elastic body 2 and the subelastic body 3 are compressively deformed. As shown in FIG. 3, in particular, the secondary elastic body 3 protruding from the first surface 21 of the main body 20 is compressed and deformed so as to be crushed, and the outer wall side surface 33 of the secondary elastic body 3 is expanded in the diameter direction (arrow D1 direction). It is elastically deformed together with the covering member 7 with bulging. Since the covering member 7 is rich in elasticity, it can follow the deformation of the secondary elastic body 3. The outer wall side surface 33 of the secondary elastic body 3 is rich in adhesiveness. Therefore, as shown in FIG. 3, the outer wall side surface 33 swelled in the diameter increasing direction (arrow D2 direction) of the secondary elastic body 3 adheres to the inner surface 7 i of the covering member 7 while appropriately expanding and contracting the covering member 7. Keep in touch with For this reason, peeling with the covering member 7 and the subelastic body 3 is suppressed. When the compressive load is released, the auxiliary elastic body 3 returns to the original shape together with the covering member 7 as shown in FIG. At this time, since the covering member 7 is rich in elasticity, it can easily follow the return deformation of the secondary elastic body 3. Even at the time of restoring deformation, the inner surface 7i of the side portion 70 of the covering member 7 is in close contact with the outer wall side surface 33 of the auxiliary elastic body 3 due to adhesiveness, and a gap is not substantially formed between the two.

以上説明したように本実施形態によれば、粘着性を有する有機系弾性材料で形成されている副弾性体３の外壁側面３３は、被覆部材７で被覆されつつ挿入穴２３に配置されている。このため副弾性体３が本来もつ固有のクッション特性を良好に発揮させることができる。すなわち、クッション構造体１は、主弾性体２および副弾性体３の双方の特性をそれぞれ発揮でき、使用者や物体等に対して良好な複合的弾性感、感圧感、マッサージ効果を与えることができる。 As described above, according to the present embodiment, the outer wall side surface 33 of the secondary elastic body 3 formed of an organic elastic material having adhesiveness is disposed in the insertion hole 23 while being covered with the covering member 7. . For this reason, it is possible to satisfactorily exhibit the inherent cushioning characteristics inherent to the secondary elastic body 3. That is, the cushion structure 1 can exhibit the characteristics of both the main elastic body 2 and the sub-elastic body 3, and can give a good composite elastic feeling, pressure-sensitive feeling, and massage effect to the user and the object. it can.

また本実施形態によれば、伸縮可能な被覆部材７により副弾性体３は被覆されている。挿入穴２３の内壁側面２５と被覆部材７の側部７０の外面７ｐとの間における接着剤層２９により、副弾性体３は被覆部材７と共に挿入穴２３に強固に保持されている。このため組付作業時、使用時等においてクッション構造体１が曲成されるときであっても、挿入穴２３からの副弾性体３の脱落が抑制される。更に、副弾性体３と被覆部材７の内面７ｉとは、副弾性体３が有する粘着性により貼り合わされているものの、接着剤層により接着されていないため、内面７ｉの拘束力は接着剤層ほど強くない。従って、副弾性体３の固有の弾性変形を損なうことが抑制され、副弾性体３の固有の弾性変形性が確保される。クッション構造体１の使用時には、クッション構造体１を表皮部材１００で包囲させることが好ましい。但し、クッション構造体１を表皮部材１００で包囲させないで使用しても良い。 Moreover, according to this embodiment, the subelastic body 3 is coat | covered with the coating | coated member 7 which can be expanded-contracted. The auxiliary elastic body 3 is firmly held in the insertion hole 23 together with the covering member 7 by the adhesive layer 29 between the inner wall side surface 25 of the insertion hole 23 and the outer surface 7 p of the side portion 70 of the covering member 7. For this reason, even when the cushion structure 1 is bent at the time of assembling work or use, the secondary elastic body 3 is prevented from falling out of the insertion hole 23. Further, although the secondary elastic body 3 and the inner surface 7i of the covering member 7 are bonded to each other due to the tackiness of the secondary elastic body 3, they are not bonded by the adhesive layer. Not as strong. Accordingly, it is possible to suppress the inherent elastic deformation of the secondary elastic body 3 and to ensure the inherent elastic deformability of the secondary elastic body 3. When the cushion structure 1 is used, the cushion structure 1 is preferably surrounded by the skin member 100. However, the cushion structure 1 may be used without being surrounded by the skin member 100.

なお、本体２０を形成する発泡材料の硬度（弾性）、密度およびその他の物理的特性を適宜変更することより、クッション構造体１のクッション特性を調整することができる。本体２０を構成する弾性発泡材料の物理的特性である硬度については、ＪＩＳ６４００で指定されている２５％硬さＩＬＤにおいて、例えば、その値が２０Ｎ／３１４ｃｍ²以下、１０Ｎ／３１４ｃｍ²以下の有機系発泡材料を使用することが好ましい。この場合、副弾性体３が有する特異な物理的特性を良好に維持させつつ、マットレス、座布団、枕、シートなどのクッション構造体１として良好に使用することができる。ＩＬＤは英字のＩＮＤＥＮＴＡＴＩＯＮ（へこみ）、ＬＯＡＤ（荷重）、ＤＥＦＬＥＣＴＩＯＮ（偏り、振れ方）を意味する略称を示す。但し、上記した硬さに限定されるものではない。 The cushion characteristics of the cushion structure 1 can be adjusted by appropriately changing the hardness (elasticity), density, and other physical characteristics of the foam material forming the main body 20. The hardness is the physical properties of elastic foam material that comprises the body 20, in 25% hardness ILD specified in JIS6400, for example, the value is 20 N / 314 cm ² or less, 10 N / 314 cm ² or less organic It is preferred to use a foam material. In this case, it can be used favorably as the cushion structure 1 such as a mattress, a cushion, a pillow, a sheet, etc., while maintaining the unique physical characteristics of the sub-elastic body 3 favorably. ILD is an abbreviation that means the English letters dentition, LOAD (load), and deflation (deflection and deflection). However, the hardness is not limited to the above.

図５は、副弾性体３を形成しているエラストマの荷重−たわみ特性を示す。エラストマの試験片のサイズはφ５０ミリメートル×高さ４２．５ミリメートルとした。荷重は０〜１０Ｎ／３１４ｃｍ²以内の範囲では、荷重増加に伴いたわみ変位は１５ｍｍ以内を示す。但し、副弾性体３を形成するエラストマといえども、この変位に限定されるものではなく、クッション構造体１の用途および種類に応じて適宜変更できる。 FIG. 5 shows the load-deflection characteristics of the elastomer forming the secondary elastic body 3. The size of the elastomer test piece was φ50 mm × height 42.5 mm. When the load is within the range of 0 to 10 N / 314 cm ² , the deflection displacement accompanying the increase in load is within 15 mm. However, even the elastomer forming the secondary elastic body 3 is not limited to this displacement, and can be appropriately changed according to the use and type of the cushion structure 1.

（実施形態２）
図６は実施形態２を示す。本実施形態は実施形態１と基本的には同様の構成および同様の作用効果を有する。本実施形態によれば、図６に示すように、主弾性体２に形成されている挿入穴２３は、主弾性体２の厚み方向（矢印Ｔ方向）の双方側に露出する開口２３ａ，２３ｃを備える。開口２３ａ，２３ｃの双方には、蓋弾性体が被着されていない。図６に示すように、被覆部材７は、副弾性体３の外壁側面３３を密着しつつ被覆する側部７０と、副弾性体３の第１端面３１を密着しつつ被覆する中間部７１と、副弾性体３の第２端面３２を被覆するように曲成部７２ｋを介して曲成された端部７２とを有する。端部７２同士は重複しつつ積層されており、副弾性体３の脱落が抑制されており、更に、端部７２同士によるクッション性が高められている。なお、副挿入穴２３からの弾性体３の脱落を抑制させるためには、端部７２同士は接着剤層７２ｍにより互いに接着されていることが好ましいが、場合によっては、接着されていなくても良い。図６に示すように、副弾性体３の第１端面３１は、主弾性体２の第１表面２１（例えば上面）よりも露出しつつΔｈ１突出する。同様に、中間部７１も主弾性体２の第１表面２１よりも露出しつつΔｈ２突出する。端部７２は主弾性体２の第２表面２２（例えば下面）よりも露出しつつΔｈ３突出する。 (Embodiment 2)
FIG. 6 shows a second embodiment. This embodiment has basically the same configuration and the same operation and effect as the first embodiment. According to the present embodiment, as shown in FIG. 6, the insertion hole 23 formed in the main elastic body 2 has openings 23 a and 23 c that are exposed on both sides in the thickness direction (arrow T direction) of the main elastic body 2. Is provided. A lid elastic body is not attached to both the openings 23a and 23c. As shown in FIG. 6, the covering member 7 includes a side portion 70 that covers the outer wall side surface 33 of the secondary elastic body 3 while closely contacting it, and an intermediate portion 71 that covers the first end surface 31 of the secondary elastic body 3 while closely contacting it. And an end portion 72 bent through a bent portion 72k so as to cover the second end face 32 of the auxiliary elastic body 3. The end portions 72 are stacked while being overlapped, the secondary elastic body 3 is prevented from falling off, and the cushioning property by the end portions 72 is enhanced. In order to suppress the dropout of the elastic body 3 from the sub-insertion hole 23, it is preferable that the end portions 72 are bonded to each other by an adhesive layer 72m. good. As shown in FIG. 6, the first end surface 31 of the secondary elastic body 3 protrudes Δh <b> 1 while being exposed from the first surface 21 (for example, the upper surface) of the main elastic body 2. Similarly, the intermediate portion 71 also projects Δh2 while being exposed from the first surface 21 of the main elastic body 2. The end 72 projects Δh3 while being exposed from the second surface 22 (for example, the lower surface) of the main elastic body 2.

上記したように本実施形態によれば、副弾性体３は伸縮可能な被覆部材７で被覆されている。挿入穴２３の内壁側面２５と被覆部材７の側部７０の外面７ｐとの間における接着剤層２９により接着されている。この状態で、各副弾性体３は、被覆部材７と共に各挿入穴２３にそれぞれ保持されている。このため組付作業時、使用時等において、主弾性体２が曲成されるときであっても、挿入穴２３からの副弾性体３の脱落が抑制される。更に、副弾性体３の外壁側面３３と被覆部材７の側部７０の内面７ｉとは、副弾性体３が有する粘着性により貼り合わされているものの、接着剤層により接着されていないため、副弾性体３に対する拘束力は接着剤層による拘束力ほど強くない。従って、副弾性体３の固有の弾性変形を損なうことが抑制され、副弾性体３の固有の弾性変形性が確保され易い。更に、副弾性体３は粘着性を有するため、粘着性によっても、被覆部材７の内面７ｉは副弾性体３のうちの外壁側面３３および第１端面３１等に貼り合わされて密着されている状態となる。従って、従来技術において発生していた上記した粘着を伴った接触、その後の剥離の現象を避けるのに有利となる。このため従来技術において発生していた副弾性体３の外壁側面３３における疲労による剥離が抑えられる。 As described above, according to this embodiment, the secondary elastic body 3 is covered with the extendable covering member 7. The adhesive layer 29 is bonded between the inner wall side surface 25 of the insertion hole 23 and the outer surface 7p of the side portion 70 of the covering member 7. In this state, each auxiliary elastic body 3 is held in each insertion hole 23 together with the covering member 7. For this reason, even when the main elastic body 2 is bent at the time of assembling work, use, etc., the dropout of the sub elastic body 3 from the insertion hole 23 is suppressed. Further, the outer wall side surface 33 of the secondary elastic body 3 and the inner surface 7i of the side portion 70 of the covering member 7 are bonded by the adhesive property of the secondary elastic body 3, but are not bonded by the adhesive layer. The restraining force on the elastic body 3 is not as strong as the restraining force by the adhesive layer. Accordingly, it is possible to suppress the inherent elastic deformation of the secondary elastic body 3 from being impaired, and it is easy to ensure the inherent elastic deformability of the secondary elastic body 3. Further, since the secondary elastic body 3 has adhesiveness, the inner surface 7i of the covering member 7 is bonded to and adhered to the outer wall side surface 33 and the first end surface 31 of the secondary elastic body 3 also due to the adhesiveness. It becomes. Therefore, it is advantageous to avoid the phenomenon of contact with the above-described adhesion, which has occurred in the prior art, and the subsequent peeling phenomenon. For this reason, the peeling by the fatigue | exhaustion in the outer wall side surface 33 of the subelastic body 3 which generate | occur | produced in the prior art is suppressed.

（実施形態３）
図７は実施形態３を示す。本実施形態は実施形態１と基本的には同様の構成および同様の作用効果を有する。本実施形態によれば、図７に示すように、被覆部材７は、副弾性体３の外壁側面３３のみをロール状に被覆している。副弾性体３の一端側（例えば上端側）の第１端面３１は、本体２０の第１表面２１から露出しつつ寸法Δｈ４突出している。このため副弾性体３の第１端面３１側の変形性は良好に確保される。副弾性体３は流動変形性に富む。このため、挿入穴２３の中心線２４同士の距離ＬＡが接近しているときには、隣接する副弾性体３の第１端面３１側の肉部３１ｗ同士が互いに接触できるように副弾性体３は弾性変形でき、クッション性を更に改善できる。 (Embodiment 3)
FIG. 7 shows a third embodiment. This embodiment has basically the same configuration and the same operation and effect as the first embodiment. According to the present embodiment, as shown in FIG. 7, the covering member 7 covers only the outer wall side surface 33 of the auxiliary elastic body 3 in a roll shape. The first end face 31 on one end side (for example, the upper end side) of the auxiliary elastic body 3 protrudes from the first surface 21 of the main body 20 while having a dimension Δh4. For this reason, the deformability of the secondary elastic body 3 on the first end face 31 side is ensured satisfactorily. The secondary elastic body 3 is rich in flow deformability. Therefore, when the distance LA between the center lines 24 of the insertion holes 23 is close, the secondary elastic body 3 is elastic so that the meat portions 31w on the first end face 31 side of the adjacent secondary elastic bodies 3 can contact each other. It can be deformed and the cushioning properties can be further improved.

（実施形態４）
図８は実施形態４を示す。本実施形態は実施形態１と基本的には同様の構成および同様の作用効果を有する。本実施形態によれば、図８に示すように、被覆部材７は可撓性および伸縮性をもつ有機系発泡材料（例えば発泡樹脂または発泡ゴム）で形成されており、副弾性体３の一側（例えば上側）の第１端面３１および外壁側面３３を被覆している。但し、図８から理解できるように、副弾性体３の脱落を抑制できる蓋弾性体２６が本体２０の第２表面２２（例えば下面）に接着剤層２６ｍにより接着されている。このため、蓋弾性体２６に対面する第２端面３２は、被覆部材７で被覆されていない。図８に示すように、被覆部材７は、副弾性体３の外壁側面３３に密着しつつこれを被覆する側部７０と、副弾性体３の第１端面３１に密着しつつこれを被覆する中間部７１とを有する。 (Embodiment 4)
FIG. 8 shows a fourth embodiment. This embodiment has basically the same configuration and the same operation and effect as the first embodiment. According to this embodiment, as shown in FIG. 8, the covering member 7 is formed of an organic foam material (for example, foam resin or foam rubber) having flexibility and stretchability. The first end surface 31 and the outer wall side surface 33 on the side (for example, the upper side) are covered. However, as can be understood from FIG. 8, the lid elastic body 26 that can prevent the secondary elastic body 3 from dropping off is bonded to the second surface 22 (for example, the lower surface) of the main body 20 by the adhesive layer 26 m. For this reason, the second end face 32 facing the lid elastic body 26 is not covered with the covering member 7. As shown in FIG. 8, the covering member 7 covers the side portion 70 that covers the outer wall side surface 33 of the auxiliary elastic body 3 while being in close contact with the first end surface 31 of the auxiliary elastic body 3. And an intermediate portion 71.

副弾性体３を主弾性体２に組み付けるには、被覆部材７を副弾性体３に被覆させる。この状態で、被覆部材７で被覆された副弾性体３が挿入穴２３に圧入される。被覆部材７は多孔質であり、可撓性および厚み方向に圧縮変形性を有するため、挿入作業は改善される。圧流後に、側部７１はこれの厚み方向に復元する。このため挿入穴２３の内壁側面２５と被覆部材７の側部７０の外面７ｐとの間における摩擦力により、副弾性体３は被覆部材７と共に挿入穴２３に保持される。このため組付作業時、使用時等において、挿入穴２３からの副弾性体３の脱落が抑制される。更に、副弾性体３の外壁側面３３と被覆部材７の側部７０の内面７ｉとは、副弾性体３が有する粘着性により互いに密着しつつ貼り合わされているものの、接着剤により接着されていない。粘着による拘束力は、接着剤層による拘束力ほど強くない。従って、副弾性体３の弾性変形を損なうことが抑制され、副弾性体３の特有の弾性変形性が確保される。また被覆部材７は高い伸縮性を有するため、副弾性体３の弾性変形に追従でき、副弾性体３の固有の弾性変形性を損なうおそれが改善される。 In order to assemble the secondary elastic body 3 to the main elastic body 2, the covering member 7 is covered with the secondary elastic body 3. In this state, the secondary elastic body 3 covered with the covering member 7 is press-fitted into the insertion hole 23. Since the covering member 7 is porous and has flexibility and compressive deformation in the thickness direction, the insertion operation is improved. After the pressure flow, the side portion 71 is restored in its thickness direction. For this reason, the secondary elastic body 3 is held in the insertion hole 23 together with the covering member 7 by a frictional force between the inner wall side surface 25 of the insertion hole 23 and the outer surface 7p of the side portion 70 of the covering member 7. For this reason, the dropout of the secondary elastic body 3 from the insertion hole 23 is suppressed at the time of assembling work or use. Further, the outer wall side surface 33 of the secondary elastic body 3 and the inner surface 7i of the side portion 70 of the covering member 7 are bonded together while being in close contact with each other due to the tackiness of the secondary elastic body 3, but are not bonded by an adhesive. . The binding force due to adhesion is not as strong as the binding force due to the adhesive layer. Therefore, it is suppressed that the elastic deformation of the secondary elastic body 3 is impaired, and the specific elastic deformability of the secondary elastic body 3 is ensured. Further, since the covering member 7 has high stretchability, it can follow the elastic deformation of the secondary elastic body 3, and the possibility of impairing the inherent elastic deformation of the secondary elastic body 3 is improved.

（実施形態５）
図９は実施形態５を示す。本実施形態は実施形態１と基本的には同様の構成および同様の作用効果を有する。本実施形態によれば、図９に示すように、主弾性体２に形成されている挿入穴２３は、主弾性体２の厚み方向（矢印Ｔ方向）の双方側に露出する開口２３ａ，２３ｃを備える。開口２３ａ，２３ｃは蓋弾性体により閉鎖されておらず、露出されている。図９に示すように、被覆部材７は、副弾性体３の外壁側面３３に密着しつつこれを被覆する側部７０と、副弾性体３の第１端面３１（上面）に密着しつつこれを被覆する中間部７１と、副弾性体３の第２端面３２（下面）に密着しつつこれを被覆する端部７２とを有する。端部７２同士は重複しつつ積層されており、端部７２同士によるクッション性が高められている。副弾性体３の脱落を抑制させるためには、端部７２同士は接着剤層７２ｍにより互いに接着されていることが好ましい。但し接着されていなくても良い。 (Embodiment 5)
FIG. 9 shows a fifth embodiment. This embodiment has basically the same configuration and the same operation and effect as the first embodiment. According to the present embodiment, as shown in FIG. 9, the insertion holes 23 formed in the main elastic body 2 have openings 23 a and 23 c that are exposed on both sides in the thickness direction (arrow T direction) of the main elastic body 2. Is provided. The openings 23a and 23c are not closed by the lid elastic body but are exposed. As shown in FIG. 9, the covering member 7 is in close contact with the side portion 70 covering the outer wall side surface 33 of the secondary elastic body 3 and the first end surface 31 (upper surface) of the secondary elastic body 3. And an end portion 72 that covers the second end surface 32 (lower surface) of the auxiliary elastic body 3 while being in close contact therewith. The end portions 72 are stacked while overlapping each other, and the cushioning property by the end portions 72 is enhanced. In order to suppress the dropout of the secondary elastic body 3, the end portions 72 are preferably bonded to each other with an adhesive layer 72m. However, it may not be bonded.

挿入穴２３の内壁側面２５と被覆部材７の側部７０の外面７ｐとの間における摩擦力により、副弾性体３は被覆部材７と共に挿入穴２３に保持されている。このため組付作業時、使用時等において挿入穴２３からの副弾性体３の脱落が抑制される。副弾性体３の外壁側面３３と被覆部材７の内面７ｉとは、副弾性体３が有する粘着性により密着されて貼り合わされているものの、接着剤層により接着されていない。粘着による拘束力は接着剤層による拘束力ほど強くない。従って、ゲル状の副弾性体３の固有の弾性変形を損なうことが抑制され、副弾性体３の固有の弾性変形性が確保される。 The secondary elastic body 3 is held in the insertion hole 23 together with the covering member 7 by a frictional force between the inner wall side surface 25 of the insertion hole 23 and the outer surface 7 p of the side portion 70 of the covering member 7. For this reason, dropping of the secondary elastic body 3 from the insertion hole 23 is suppressed during assembling work, use, and the like. The outer wall side surface 33 of the secondary elastic body 3 and the inner surface 7i of the covering member 7 are in close contact with each other due to the adhesive property of the secondary elastic body 3, but are not bonded by the adhesive layer. The binding force due to adhesion is not as strong as the binding force due to the adhesive layer. Therefore, it is suppressed that the inherent elastic deformation of the gel-like subelastic body 3 is impaired, and the inherent elastic deformability of the subelastic body 3 is ensured.

更に、前述したように、副弾性体３は粘着によって、被覆部材７の内面７ｉは副弾性体３のうちの外壁側面３３に密着されつつ貼り合わされている状態となる。従って、従来技術において発生していた上記した粘着を伴った接触、その後の剥離の現象を避けるのに有利となる。このため従来技術において発生していた副弾性体３の外壁側面３３における疲労による剥離が抑えられる。 Furthermore, as described above, the secondary elastic body 3 is adhered and the inner surface 7i of the covering member 7 is bonded to the outer wall side surface 33 of the secondary elastic body 3 while being in close contact. Therefore, it is advantageous to avoid the phenomenon of contact with the above-described adhesion, which has occurred in the prior art, and the subsequent peeling phenomenon. For this reason, the peeling by the fatigue | exhaustion in the outer wall side surface 33 of the subelastic body 3 which generate | occur | produced in the prior art is suppressed.

（実施形態６）
図１０は実施形態６を示す。本実施形態は実施形態１と基本的には同様の構成および同様の作用効果を有する。本実施形態によれば、図１０に示すように、主弾性体２に形成されている挿入穴２３の内壁側面２５のほぼ全域には、凹凸部２５０が形成されている。副弾性体３を被覆する被覆部材７の外面７ｐは、凹凸部２５０に摩擦係合する。これにより摩擦係合力が確保され、副弾性体３の脱落が効果的に抑制される。副弾性体３は有機系多孔質材料（例えば発泡樹脂または発泡ゴム）であるため、凹凸部２５０の型抜きは容易である。凹凸部２５０のサイズは適宜設定できる。場合によっては、凹凸部２５０と外面７ｐとの間に接着剤層を介在させても良い。 (Embodiment 6)
FIG. 10 shows a sixth embodiment. This embodiment has basically the same configuration and the same operation and effect as the first embodiment. According to the present embodiment, as shown in FIG. 10, the concavo-convex portion 250 is formed in almost the entire area of the inner wall side surface 25 of the insertion hole 23 formed in the main elastic body 2. The outer surface 7 p of the covering member 7 that covers the sub-elastic body 3 is frictionally engaged with the concavo-convex portion 250. As a result, a frictional engagement force is ensured and the secondary elastic body 3 is effectively prevented from falling off. Since the secondary elastic body 3 is an organic porous material (for example, foamed resin or foamed rubber), it is easy to remove the uneven portion 250. The size of the uneven portion 250 can be set as appropriate. In some cases, an adhesive layer may be interposed between the uneven portion 250 and the outer surface 7p.

（その他）
発明は上記し且つ図面に示した実施形態のみに限定されるものではなく、要旨を逸脱しない範囲内で適宜変更して実施できる。副弾性体３は円柱形状とされているが、三角柱形状、四角柱形状、六角形状でも良い。これに応じて挿入孔２３の平面形状も三角形状、四角形状、六角形状にできる。 (Other)
The invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications within the scope not departing from the gist. The secondary elastic body 3 is formed in a cylindrical shape, but may be a triangular prism shape, a quadrangular prism shape, or a hexagonal shape. Accordingly, the planar shape of the insertion hole 23 can also be triangular, quadrangular, or hexagonal.

１はクッション構造体、２は主弾性体、２０は本体、２１は第１表面、２２は第２表面ん、２３は挿入穴、２３ａ，２３ｃは開口、２４は中心線、２５は内壁側面、２６は蓋弾性体（蓋部材）、２９は接着剤層、３は副弾性体、３１は第１端面、３２は第２端面、３３は外壁側面、７は被覆部材、７ｐは外面、７ｉは内面、７０は側部、７１は中間部、７２は端部、７２ｍは接着剤層、１００は表皮部材を示す。 1 is a cushion structure, 2 is a main elastic body, 20 is a main body, 21 is a first surface, 22 is a second surface, 23 is an insertion hole, 23a and 23c are openings, 24 is a center line, 25 is an inner wall side surface, 26 is a lid elastic body (lid member), 29 is an adhesive layer, 3 is a secondary elastic body, 31 is a first end surface, 32 is a second end surface, 33 is an outer wall side surface, 7 is a covering member, 7p is an outer surface, and 7i is The inner surface, 70 is a side portion, 71 is an intermediate portion, 72 is an end portion, 72 m is an adhesive layer, and 100 is a skin member.

Claims

内壁側面で区画され且つ厚み方向の少なくとも一方側に開口を備える複数の挿入穴を有する有機系弾性材料で形成された主弾性体と、
前記主弾性体の前記挿入穴に配置され、前記挿入穴の前記内壁側面に対面する外壁側面をもち且つ粘着性を有する有機系弾性材料で形成された副弾性体と、
前記副弾性体のうち少なくとも前記外壁側面を被覆する伸縮可能な被覆部材とを具備しており、
前記挿入穴の前記内壁側面と前記被覆部材の外面との間における接着剤層または摩擦力により、前記副弾性体は前記挿入穴に保持されているクッション構造体。 A main elastic body formed of an organic elastic material having a plurality of insertion holes which are partitioned by an inner wall side surface and have openings on at least one side in the thickness direction;
A secondary elastic body that is disposed in the insertion hole of the main elastic body, has an outer wall side surface facing the inner wall side surface of the insertion hole, and is formed of an organic elastic material having adhesiveness;
A stretchable covering member covering at least the outer wall side surface of the sub-elastic body;
A cushion structure in which the secondary elastic body is held in the insertion hole by an adhesive layer or a frictional force between the inner wall side surface of the insertion hole and the outer surface of the covering member.

請求項１において、前記被覆部材の伸縮率は常温領域において１２０％以上であるクッション構造体。 2. The cushion structure according to claim 1, wherein the expansion / contraction rate of the covering member is 120% or more in a normal temperature region.

請求項１または２において、前記副弾性体の前記外壁側面と前記被覆部材の内面とは、前記副弾性体が有する粘着性により貼り合わされており、接着剤層により接着されていないクッション構造体。 3. The cushion structure according to claim 1, wherein the outer wall side surface of the auxiliary elastic body and the inner surface of the covering member are bonded together by the adhesive property of the auxiliary elastic body and are not bonded by the adhesive layer.

請求項１〜３のうちの一項において、前記主弾性体は、厚み方向の双方側に露出する開口を備える複数の前記挿入穴をもつ本体と、前記本体の前記挿入穴のうち一方の前記開口を前記主弾性体において露出させつつ他方の前記開口を塞ぐように前記本体に接合されている蓋弾性体とを具備するクッション構造体。 The main elastic body according to claim 1, wherein the main elastic body has a plurality of insertion holes provided with openings exposed on both sides in the thickness direction, and one of the insertion holes of the main body. A cushion structure comprising: a lid elastic body joined to the main body so as to close the other opening while exposing the opening in the main elastic body.

請求項１〜３のうちの一項において、前記主弾性体はこれの厚み方向の双方側に露出する開口をそれぞれ備えており、前記被覆部材は前記開口から露出しているクッション構造体。 4. The cushion structure according to claim 1, wherein the main elastic body includes openings exposed on both sides in a thickness direction thereof, and the covering member is exposed from the opening. 5.