JP6907450B2

JP6907450B2 - Shock absorber and chair with it

Info

Publication number: JP6907450B2
Application number: JP2017007513A
Authority: JP
Inventors: 光守安田
Original assignee: 株式会社エルゴジャパン
Priority date: 2017-01-19
Filing date: 2017-01-19
Publication date: 2021-07-21
Anticipated expiration: 2037-01-19
Also published as: JP2018114148A

Description

本発明は、緩衝装置及びそれを備えた椅子に関する。 The present invention relates to a shock absorber and a chair equipped with the shock absorber.

座部に対して傾動可能な背もたれ部を有する椅子が知られている。そのような椅子は、背もたれ部の傾動を元の位置に戻るよう、引張りバネ、圧縮コイルバネ等を有する緩衝装置が用いられている（例えば、特許文献１、２、３参照）。 A chair having a backrest that can be tilted with respect to a seat is known. In such a chair, a shock absorber having a tension spring, a compression coil spring, or the like is used so that the tilt of the backrest portion returns to the original position (see, for example, Patent Documents 1, 2, and 3).

他方、パチンコ、パチスロ、ゲームなどの遊技場に用いられる椅子は、多くの遊技台等を設置できるように、遊技台等に対応して設けられる椅子、ひいては、緩衝装置のコンパクト性が求められている。 On the other hand, chairs used in pachinko, pachislot, games, and other amusement parks are required to have compactness of chairs and shock absorbers that are provided corresponding to the amusement machines so that many amusement machines can be installed. There is.

圧縮コイルバネを用いた緩衝装置をコンパクトにするためには、圧縮コイルバネを適切に圧縮状態に保つ必要がある。 In order to make the shock absorber using the compression coil spring compact, it is necessary to keep the compression coil spring in a properly compressed state.

登録実用新案公報３１２８２７６号公報Registered Utility Model Gazette No. 3128276 特開平６−２６１８１８号公報Japanese Unexamined Patent Publication No. 6-261818 特開２０１６−１３１６１５号公報Japanese Unexamined Patent Publication No. 2016-131615

本発明の課題は、圧縮コイルバネを適切に圧縮状態に保つことができる緩衝装置及びこれを用いた椅子を提供することにある。 An object of the present invention is to provide a shock absorber capable of appropriately keeping a compression coil spring in a compressed state, and a chair using the shock absorber.

上記課題を解決するため、本発明の緩衝装置は、椅子の座部に対して傾動可能な背もたれ部の傾動を緩衝する緩衝装置であって、前記座部に取り付けられ、後方が開放するように一対の側壁部と前方壁部とを有する容器本体部と、前記容器本体部の一対の側壁部に揺動可能に取り付けられ、前方が開放するように後方壁部を有する連動部材であって前記背もたれ部の傾動に伴って前記連動部材の前記後方壁部が前記容器本体部の前記前方壁部に近づくように揺動する連動部材と、前記容器本体部の前記前方壁部と前記連動部材の前記後方壁部との間に圧縮された状態で配置され、前記連動部材の前記後方壁部が前記容器本体部の前記前方壁部から離れるような圧縮復元力を前記連動部材の前記後方壁部に付与する圧縮コイルバネと、前記容器本体部の前記前方壁部に設けられ、前記圧縮コイルバネの圧縮量を調整する圧縮量調整機構と、を備え、前記圧縮量調整機構は、前記容器本体部の前記前方壁部に螺合する雄ネジと、前記雄ネジの先端と前記圧縮コイルバネの前記雄ネジ側の端部との間に配置されたコイルバネ受け部とを有することを特徴とする。 In order to solve the above problems, the shock absorber of the present invention is a shock absorber that cushions the tilt of the backrest portion that can be tilted with respect to the seat portion of the chair, and is attached to the seat portion so that the rear portion is opened. An interlocking member that is swingably attached to a pair of side wall portions having a pair of side wall portions and a front wall portion and a pair of side wall portions of the container main body portion and has a rear wall portion so as to open the front. An interlocking member that swings so that the rear wall portion of the interlocking member approaches the front wall portion of the container body portion as the backrest portion tilts, and the front wall portion of the container body portion and the interlocking member. The rear wall portion of the interlocking member is arranged in a compressed state with the rear wall portion, and a compressive restoring force is applied so that the rear wall portion of the interlocking member is separated from the front wall portion of the container main body portion. A compression coil spring to be applied to the container and a compression amount adjusting mechanism provided on the front wall portion of the container body portion to adjust the compression amount of the compression coil spring, and the compression amount adjusting mechanism is provided on the container body portion. It is characterized by having a male screw screwed into the front wall portion and a coil spring receiving portion arranged between the tip of the male screw and the end of the compression coil spring on the male screw side.

本発明の緩衝装置において、前記圧縮量調整機構は、前記圧縮コイルバネの端部にコイルバネ受け部を有することが好ましい。 In the shock absorber of the present invention, it is preferable that the compression amount adjusting mechanism has a coil spring receiving portion at an end portion of the compression coil spring.

本発明の緩衝装置において、前記コイルバネ受け部は、両端に、それぞれ、凸面部及び凹面部を有し、前記圧縮コイルバネの前記圧縮復元力の付与方向から見た場合において、前記凸面部の凸部が前記圧縮コイルバネの前記雄ネジ側のリング状の中央に位置し、前記圧縮コイルバネの前記雄ネジ側の端部が前記凸部の周囲に位置し、前記雄ネジ側のリング状の中央前記凹面部の凹部が、前記圧縮コイルバネの前記雄ネジ側のリング状の中央に位置し、前記雄ネジの先端が前記凹面部の前記凹部に位置していることを特徴とする。 In the shock absorber of the present invention, the coil spring receiving portion has convex and concave portions at both ends, respectively, and the convex portion of the convex portion when viewed from the direction in which the compression restoring force of the compression coil spring is applied. Is located at the center of the ring shape on the male screw side of the compression coil spring, the end portion of the compression coil spring on the male screw side is located around the convex portion, and the concave surface at the center of the ring shape on the male screw side. The concave portion of the portion is located at the center of the ring shape on the male screw side of the compression coil spring, and the tip of the male screw is located at the concave portion of the concave surface portion.

本発明の緩衝装置において、さらに、前記連動部材の揺動可能な範囲を規制する揺動規制部を備えることを特徴とする。 The shock absorber of the present invention is further characterized by including a swing restricting unit that regulates a swingable range of the interlocking member.

本発明の椅子は、上述のいずれかに記載の緩衝装置と、前記緩衝装置が設けられた座部と、前記座部に対して傾動可能な背もたれ部とを備えることを特徴とする。 The chair of the present invention is characterized by including the shock absorber according to any one of the above, a seat portion provided with the shock absorber, and a backrest portion tiltable with respect to the seat portion.

本発明によれば、圧縮量調整機構は、雄ネジの先端と圧縮コイルバネの雄ネジ側の端部との間に配置されたコイルバネ受け部を有するので、圧縮コイルバネを適切に圧縮状態に保つことができる緩衝装置及びこれを用いた椅子を提供することができる。 According to the present invention, the compression amount adjusting mechanism has a coil spring receiving portion arranged between the tip of the male screw and the end of the compression coil spring on the male screw side, so that the compression coil spring is appropriately kept in a compressed state. It is possible to provide a shock absorber capable of providing a shock absorber and a chair using the same.

本発明に係る緩衝装置及びこれを用いた椅子の側面図である。It is a side view of the shock absorber which concerns on this invention, and the chair using this. 図１に示した緩衝装置の分解斜視図である。It is an exploded perspective view of the shock absorber shown in FIG. 図１に示した緩衝装置の斜視図である。It is a perspective view of the shock absorber shown in FIG. 図３に示した緩衝装置のＩＶ−ＩＶ断面図である。FIG. 3 is an IV-IV cross-sectional view of the shock absorber shown in FIG.

以下、図面を参照して本発明を実施するための形態について詳細に説明する。 Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

（椅子）
図１に示すように、椅子１００は、緩衝装置１０と、緩衝装置１０が設けられた座部１１０と、座部１１０に対して傾動可能な背もたれ部１２０とを備える。椅子１００に腰掛けた人が向いている方向を前方向、その反対方向を後方向とする。 (Chair)
As shown in FIG. 1, the chair 100 includes a shock absorber 10, a seat portion 110 provided with the shock absorber 10, and a backrest portion 120 that can be tilted with respect to the seat portion 110. The direction in which the person sitting on the chair 100 is facing is the front direction, and the opposite direction is the rear direction.

（座部）
座部１１０は、パチンコ、パチスロ、ゲームなどの遊技場の床Ｆに、ボルトのような部材で組み付けられ、垂直に伸びる脚部１３０の上端部に回転可能に取り付けられている。 (Za)
The seat portion 110 is assembled to the floor F of a game hall such as a pachinko machine, a pachislot machine, or a game with a member such as a bolt, and is rotatably attached to an upper end portion of a vertically extending leg portion 130.

（背もたれ部）
背もたれ部１２０は、座部１１０に設けられた背もたれ用回転軸１１４を中心に傾動可能に取り付けられており、背もたれ用回転軸１１４より下部に延在した棒状の反力受け部１１２を有する。
(Backrest)
The backrest portion 120 is tiltably attached to the backrest rotating shaft 114 provided on the seat portion 110, and has a rod-shaped reaction force receiving portion 112 extending below the backrest rotating shaft 114.

背もたれ部１２０は、背もたれ部１２０が倒される方向（図１の紙面において時計方向）に傾動すると、反力受け部１１２は、緩衝装置１０の前方向（図１の紙面において左側）に動くように、座部１１０に取り付けられている。
When the backrest portion 120 is tilted in the direction in which the backrest portion 120 is tilted (clockwise on the paper surface of FIG. 1), the reaction force receiving portion 112 moves in the front direction (left side on the paper surface of FIG. 1) of the shock absorber 10. , Attached to the seat 110.

（緩衝装置）
緩衝装置１０は、座部１１０の裏側に取り付けられており、後述するように、圧縮コイルバネ４０（図２参照）が内蔵され、背もたれ部１２０が背もたれ用回転軸１１４を中心に傾動する際に反力受け部１１２が圧縮コイルバネ４０を圧縮する。これにより、緩衝装置１０は、椅子１００の座部１１０に対して傾動可能な背もたれ部１２０の傾動を緩衝する。 (Cushioning device)
The shock absorber 10 is attached to the back side of the seat portion 110, and has a built-in compression coil spring 40 (see FIG. 2) as described later. The force receiving portion 112 compresses the compression coil spring 40. As a result, the shock absorber 10 buffers the tilt of the backrest portion 120 that can be tilted with respect to the seat portion 110 of the chair 100.

図２から図４に示すように、緩衝装置１０は、容器本体部２０と、連動部材３０と、圧縮コイルバネ４０と、圧縮量調整機構５０とを備える。緩衝装置１０は、さらに、揺動規制部７０と回転軸８０とを備える。 As shown in FIGS. 2 to 4, the shock absorber 10 includes a container main body 20, an interlocking member 30, a compression coil spring 40, and a compression amount adjusting mechanism 50. The shock absorber 10 further includes a swing restricting unit 70 and a rotating shaft 80.

（容器本体部）
容器本体部２０は、座部１１０の裏側に取り付けられている。容器本体部２０は、後方が開放するように一対の側壁部２２と前方壁部２４と底方壁部２６とを有する。 (Container body)
The container body 20 is attached to the back side of the seat 110. The container main body portion 20 has a pair of side wall portions 22, a front wall portion 24, and a bottom wall portion 26 so that the rear portion is open.

一対の側壁部２２には、それぞれ、一対の貫通孔２２ａが形成され、回転軸８０を支持する支持部として機能する。 A pair of through holes 22a are formed in each of the pair of side wall portions 22, and function as support portions for supporting the rotation shaft 80.

また、一対の側壁部２２のそれぞれの上部には、鍔部２４ｂが延在し、鍔部２４ｂに形成された貫通孔に雄ネジを通して、容器本体部２０が座部１１０の裏側に取り付けられる。 Further, a flange portion 24b extends from each upper portion of the pair of side wall portions 22, and a container main body portion 20 is attached to the back side of the seat portion 110 by passing a male screw through a through hole formed in the collar portion 24b.

前方壁部２４には、後述する雄ネジ５２が螺合する雌ネジ２４ａが形成されている。上下方向において、雌ネジ２４ａは、一対の貫通孔２２ａの下側に形成されている。 A female screw 24a into which a male screw 52, which will be described later, is screwed is formed on the front wall portion 24. In the vertical direction, the female screw 24a is formed below the pair of through holes 22a.

容器本体部２０は、例えば、鉄、ステンレス等の金属板を、１回以上のプレス加工により、打ち抜き加工、曲げ加工が施されて、形成される。 The container body 20 is formed by, for example, punching and bending a metal plate such as iron or stainless steel by one or more press workings.

（連動部材）
連動部材３０は、容器本体部２０の一対の側壁部２２に揺動可能に取り付けられ、前方が開放するように一対の側壁部３２と後方壁部３４と底方壁部３６と上方壁部３８とを有する。 (Interlocking member)
The interlocking member 30 is swingably attached to the pair of side wall portions 22 of the container main body portion 20, and the pair of side wall portions 32, the rear wall portion 34, the bottom wall portion 36, and the upper wall portion 38 are opened so as to open the front. And have.

一対の側壁部３２の上部側には、それぞれ、一対の貫通孔３２ａが形成されている。一対の貫通孔３２ａには、それぞれ、滑り軸受けとして作用する一対のブッシュ８２が挿入され、回転軸８０がブッシュ８２に摺動回転可能に挿入される。これにより、連動部材３０は、回転軸８０によって揺動可能に支持される。 A pair of through holes 32a are formed on the upper side of the pair of side wall portions 32, respectively. A pair of bushes 82 acting as sliding bearings are inserted into the pair of through holes 32a, respectively, and the rotating shaft 80 is slidably and rotatably inserted into the bushes 82. As a result, the interlocking member 30 is swingably supported by the rotating shaft 80.

連動部材３０が容器本体部２０の内側で揺動可能に位置するように、一対の側壁部３２の外側面の間の距離（いわゆる、外寸法）は、一対の側壁部２２の内側面の間の距離（いわゆる、内寸法）より、小さい。 The distance (so-called outer dimension) between the outer surfaces of the pair of side wall portions 32 is between the inner side surfaces of the pair of side wall portions 22 so that the interlocking member 30 is positioned so as to be swingable inside the container main body portion 20. Is smaller than the distance (so-called internal dimension).

後方壁部３４は、後方側に出っ張っている凸形状部を有する。 The rear wall portion 34 has a convex portion protruding to the rear side.

後方壁部３４の凸形状部には、貫通孔３４ａが形成され、また、後方壁部３４の後方側には、貫通孔３４ａをとおり左右方向（前後方向に直交する水平方向）に伸びる溝部３４ｂが形成されている。溝部３４ｂは、反力受け部１１２が貫通孔３４ａに位置するよう、案内機能を有する。上下方向において、貫通孔３４ａ及び溝部３４ｂは、一対の貫通孔３２ａの下側に形成されている。 A through hole 34a is formed in the convex portion of the rear wall portion 34, and a groove portion 34b extending in the left-right direction (horizontal direction orthogonal to the front-rear direction) through the through hole 34a on the rear side of the rear wall portion 34. Is formed. The groove portion 34b has a guiding function so that the reaction force receiving portion 112 is located in the through hole 34a. In the vertical direction, the through hole 34a and the groove portion 34b are formed below the pair of through holes 32a.

爪部３６ａが回転軸８０を中心に揺動するよう、底方壁部３６の下部から下方に向けて爪部３６ａが延在している。 The claw portion 36a extends downward from the lower portion of the bottom wall portion 36 so that the claw portion 36a swings around the rotation shaft 80.

連動部材３０は、例えば、鉄、ステンレス等の金属板を、１回以上のプレス加工により、打ち抜き加工、曲げ加工が施されて、形成される。 The interlocking member 30 is formed by, for example, punching and bending a metal plate such as iron or stainless steel by one or more press workings.

（圧縮コイルバネ）
圧縮コイルバネ４０は、一端が前方壁部２４に向き、他端が後方壁部３４に向きくように圧縮された状態で、容器本体部２０と連動部材３０とで構成する収容部に配置される。圧縮コイルバネ４０の他端と後方壁部３４との間には、受け部材８６が配置される。 (Compression coil spring)
The compression coil spring 40 is arranged in the accommodating portion composed of the container main body portion 20 and the interlocking member 30 in a compressed state so that one end faces the front wall portion 24 and the other end faces the rear wall portion 34. .. A receiving member 86 is arranged between the other end of the compression coil spring 40 and the rear wall portion 34.

受け部材８６は、円盤部８６ａと、円盤部８６ａの前方側に形成された凸部８６ｂと、円盤部８６ａの後方側に形成された溝部８６ｃとを有する。 The receiving member 86 has a disk portion 86a, a convex portion 86b formed on the front side of the disk portion 86a, and a groove portion 86c formed on the rear side of the disk portion 86a.

凸部８６ｂは、圧縮コイルバネ４０の連動部材３０側のリング状の端部の内側に挿入され、溝部８６ｃは、反力受け部１１２が圧縮コイルバネ４０の中心に位置するよう、案内機能を有する。 The convex portion 86b is inserted inside the ring-shaped end portion on the interlocking member 30 side of the compression coil spring 40, and the groove portion 86c has a guiding function so that the reaction force receiving portion 112 is located at the center of the compression coil spring 40.

（圧縮量調整機構）
圧縮量調整機構５０は、容器本体部２０の前方壁部２４に設けられ、圧縮コイルバネ４０の圧縮量を調整する。 (Compression amount adjustment mechanism)
The compression amount adjusting mechanism 50 is provided on the front wall portion 24 of the container main body portion 20 and adjusts the compression amount of the compression coil spring 40.

圧縮量調整機構５０は、先端が圧縮コイルバネ４０側に向くように、容器本体部２０の前方壁部２４に螺合する雄ネジ５２と、雄ネジ５２の先端と圧縮コイルバネ４０の雄ネジ５２側の端部との間に配置されたコイルバネ受け部５４及びフランジ部材５６とを有する。 The compression amount adjusting mechanism 50 has a male screw 52 screwed into the front wall portion 24 of the container body 20 so that the tip faces the compression coil spring 40 side, and the tip of the male screw 52 and the male screw 52 side of the compression coil spring 40. It has a coil spring receiving portion 54 and a flange member 56 arranged between the end portion and the end portion of the coil spring receiving portion 54.

コイルバネ受け部５４は、両端に、それぞれ、凸面部５４ａ及び凹面部５４ｂを有する。 The coil spring receiving portion 54 has a convex surface portion 54a and a concave surface portion 54b, respectively, at both ends.

圧縮コイルバネ４０の圧縮復元力の付与方向（前後方向）から見た場合において、凸面部５４ａの凸部が圧縮コイルバネ４０の雄ネジ５２側のリング状の中央に位置すると共に、圧縮コイルバネ４０の雄ネジ５２側の端部が凸面部５４ａの凸部の周囲に位置する。 When viewed from the direction in which the compression restoring force of the compression coil spring 40 is applied (front-rear direction), the convex portion of the convex surface portion 54a is located at the center of the ring shape on the male screw 52 side of the compression coil spring 40, and the male of the compression coil spring 40. The end portion on the screw 52 side is located around the convex portion of the convex surface portion 54a.

また、圧縮コイルバネ４０の圧縮復元力の付与方向（前後方向）から見た場合において、凹面部５４ｂの凹部が、圧縮コイルバネ４０の雄ネジ５２側のリング状の中央に位置すると共に、雄ネジ５２の先端が凹面部５４ｂの凹部に位置している。 Further, when viewed from the direction in which the compression restoring force of the compression coil spring 40 is applied (front-rear direction), the concave portion of the concave surface portion 54b is located at the center of the ring shape on the male screw 52 side of the compression coil spring 40, and the male screw 52. Is located in the recess of the concave surface portion 54b.

フランジ部材５６は、中央に貫通孔を有し、後方に凸状のフランジ形状を有する。圧縮コイルバネ４０の圧縮復元力の付与方向（前後方向）から見た場合において、凸状の部分が圧縮コイルバネ４０の雄ネジ５２側のリング状の中央に位置すると共に、圧縮コイルバネ４０の雄ネジ５２側の端部が凸状の部分の周囲に位置する。 The flange member 56 has a through hole in the center and a convex flange shape in the rear. When viewed from the direction in which the compression restoring force of the compression coil spring 40 is applied (front-back direction), the convex portion is located at the center of the ring shape on the male screw 52 side of the compression coil spring 40, and the male screw 52 of the compression coil spring 40. The side edge is located around the convex portion.

また、圧縮コイルバネ４０の圧縮復元力の付与方向（前後方向）から見た場合において、フランジ部材５６の中央の貫通孔に凸面部５４ａの凸部が位置し、コイルバネ受け部５４は、フランジ部材５６に対して位置決めされる。 Further, when viewed from the direction in which the compression restoring force of the compression coil spring 40 is applied (front-rear direction), the convex portion of the convex surface portion 54a is located in the through hole at the center of the flange member 56, and the coil spring receiving portion 54 is the flange member 56. Positioned against.

（揺動規制部）
揺動規制部７０は、連動部材３０の揺動可能な範囲を規制する部材である。揺動規制部７０は、容器本体部２０の底方壁部２６にネジ７４のような螺合部材で取り付けられる。 (Swing regulation part)
The swing restricting unit 70 is a member that regulates the swingable range of the interlocking member 30. The swing restricting portion 70 is attached to the bottom wall portion 26 of the container main body portion 20 with a screwing member such as a screw 74.

揺動規制部７０には、凹部７２が形成されており、爪部３６ａが凹部７２内を揺動する。底方壁部３６の下部から下方に向けて爪部３６ａが延在している。 A recess 72 is formed in the swing restricting portion 70, and the claw portion 36a swings in the recess 72. The claw portion 36a extends downward from the lower portion of the bottom wall portion 36.

（回転軸）
回転軸８０は、一般的なシャフトであり、一端にフランジが形成され、他端に、Ｃリング８４が止められる止め輪溝が形成されている。 (Axis of rotation)
The rotating shaft 80 is a general shaft, and a flange is formed at one end and a retaining ring groove for stopping the C ring 84 is formed at the other end.

（緩衝装置の組み立て手順）
以下に、緩衝装置１０の組み立て手順の一例を示す。 (Assembly procedure of shock absorber)
An example of the procedure for assembling the shock absorber 10 is shown below.

連動部材３０の一対の貫通孔３２ａに、それぞれ、一対のブッシュ８２を挿入する。 A pair of bushes 82 are inserted into the pair of through holes 32a of the interlocking member 30, respectively.

雄ネジ５２の先端が後方に向くように、容器本体部２０の前方壁部２４の雌ネジ２４ａに雄ネジ５２を螺合させる。雄ネジ５２の先端は、前方壁部２４の内側面より後方に突出する。 The male screw 52 is screwed into the female screw 24a of the front wall portion 24 of the container body 20 so that the tip of the male screw 52 faces rearward. The tip of the male screw 52 projects rearward from the inner surface of the front wall portion 24.

容器本体部２０の底方壁部２６にネジ７４を用いて揺動規制部７０を取り付ける。これにより、揺動規制部７０の凹部７２は、容器本体部２０に対して、相対的移動不能に取り付けられる。 The swing control portion 70 is attached to the bottom wall portion 26 of the container body portion 20 using screws 74. As a result, the recess 72 of the swing restricting portion 70 is attached to the container body portion 20 so as to be relatively immovable.

コイルバネ受け部５４の凸面部５４ａがフランジ部材５６の貫通孔に挿入するように、コイルバネ受け部５４にフランジ部材５６を重ねる。これにより、フランジ部材５６がコイルバネ受け部５４に対してズレが殆ど生じなくなる。 The flange member 56 is overlapped with the coil spring receiving portion 54 so that the convex surface portion 54a of the coil spring receiving portion 54 is inserted into the through hole of the flange member 56. As a result, the flange member 56 is hardly displaced from the coil spring receiving portion 54.

雄ネジ５２の先端が凹面部５４ｂの凹部に位置するように、雄ネジ５２の先端にコイルバネ受け部５４の凹面部５４ｂを当接させる。 The concave surface portion 54b of the coil spring receiving portion 54 is brought into contact with the tip end of the male screw 52 so that the tip end of the male screw 52 is located in the concave portion of the concave surface portion 54b.

圧縮コイルバネ４０の一端をフランジ部材５６の凸状が形成された側に当接させると共に、他端を受け部材８６の凸部８６ｂ側に当接させる。 One end of the compression coil spring 40 is brought into contact with the convex side of the flange member 56, and the other end is brought into contact with the convex portion 86b side of the member 86.

受け部材８６の溝部８６ｃに、連動部材３０の後方壁部３４の内側を当接させる。このとき、圧縮コイルバネ４０は、自然長になっているので、一対の貫通孔２２ａと一対の貫通孔３２ａとは、重なり合わない。 The inside of the rear wall portion 34 of the interlocking member 30 is brought into contact with the groove portion 86c of the receiving member 86. At this time, since the compression coil spring 40 has a natural length, the pair of through holes 22a and the pair of through holes 32a do not overlap.

一対の貫通孔２２ａと一対の貫通孔３２ａとが重なるように、かつ、爪部３６ａが凹部７２に入るように、圧縮コイルバネ４０の圧縮復元力より大きい力で、連動部材３０を容器本体部２０に近づける。 The interlocking member 30 is placed in the container body 20 with a force larger than the compression restoration force of the compression coil spring 40 so that the pair of through holes 22a and the pair of through holes 32a overlap each other and the claw portion 36a enters the recess 72. Get closer to.

重なった一対の貫通孔２２ａと一対の貫通孔３２ａとに回転軸８０を挿入し、回転軸８０の先端近傍に形成されている止め輪溝にＣリング８４を取り付ける。これにより、圧縮コイルバネ４０は、容器本体部２０の前方壁部２４と連動部材３０の後方壁部３４との間に圧縮された状態で配置される。このため、圧縮コイルバネ４０は、連動部材３０の後方壁部３４が容器本体部２０の前方壁部２４から離れるような圧縮復元力を連動部材３０の後方壁部３４に付与する。 The rotating shaft 80 is inserted into the pair of overlapping through holes 22a and the pair of through holes 32a, and the C ring 84 is attached to the retaining ring groove formed near the tip of the rotating shaft 80. As a result, the compression coil spring 40 is arranged in a compressed state between the front wall portion 24 of the container main body portion 20 and the rear wall portion 34 of the interlocking member 30. Therefore, the compression coil spring 40 applies a compression restoring force to the rear wall portion 34 of the interlocking member 30 so that the rear wall portion 34 of the interlocking member 30 is separated from the front wall portion 24 of the container main body portion 20.

連動部材３０は、容器本体部２０から離れようとするが、連動部材３０は、回転軸８０によって、揺動可能に容器本体部２０に取り付けられているので、回転軸８０を中心に回転しようとする。しかし、連動部材３０の爪部３６ａが揺動規制部７０の凹部７２に引っかかるので、圧縮コイルバネ４０は所定の圧縮復元力を常に発揮する状態にされる。 The interlocking member 30 tries to move away from the container main body 20, but since the interlocking member 30 is swingably attached to the container main body 20 by the rotating shaft 80, it tries to rotate about the rotating shaft 80. do. However, since the claw portion 36a of the interlocking member 30 is caught in the recess 72 of the swing restricting portion 70, the compression coil spring 40 is always in a state of exerting a predetermined compression restoration force.

この圧縮コイルバネ４０の圧縮によって発揮される所定の圧縮復元力は、フランジ部材５６の周囲に略均等に作用し、ひいては、コイルバネ受け部５４の周囲に略均等に作用する。 The predetermined compression restoration force exerted by the compression of the compression coil spring 40 acts substantially evenly around the flange member 56, and thus acts substantially evenly around the coil spring receiving portion 54.

他方、雄ネジ５２の先端がコイルバネ受け部５４の中心である凹面部５４ｂの凹部に位置しているので、雄ネジ５２は、コイルバネ受け部５４の周囲に作用した所定の圧縮復元力を安定的に受けることができる。このため、緩衝装置１０は、圧縮コイルバネ４０を適切に圧縮状態に保つことができる。 On the other hand, since the tip of the male screw 52 is located in the recess of the concave surface portion 54b which is the center of the coil spring receiving portion 54, the male screw 52 stabilizes a predetermined compression restoring force acting around the coil spring receiving portion 54. Can be received. Therefore, the shock absorber 10 can appropriately keep the compression coil spring 40 in the compressed state.

以上、実施するための形態を用いて本発明を説明したが、本発明の技術的範囲は上記実施するための形態に記載の範囲に限定されないことは言うまでもない。上記実施するための形態に、多様な変更又は改良を加えることが可能であることが当業者に明らかである。また、その様な変更又は改良を加えた形態も本発明の技術的範囲に含まれ得ることが、特許請求の範囲の記載から明らかである。 Although the present invention has been described above using the embodiments for implementation, it goes without saying that the technical scope of the present invention is not limited to the scope described in the embodiments for implementation. It will be apparent to those skilled in the art that various changes or improvements can be made to the embodiments described above. Further, it is clear from the description of the scope of claims that such a modified or improved form may be included in the technical scope of the present invention.

１０緩衝装置
２０容器本体部
２２側壁部
２２ａ貫通孔
２４前方壁部
２４ａ雌ネジ
２４ｂ鍔部
２６底方壁部
３０連動部材
３２側壁部
３２ａ貫通孔
３４後方壁部
３４ａ貫通孔
３４ｂ溝部
３６底方壁部
３６ａ爪部
３８上方壁部
４０圧縮コイルバネ
５０圧縮量調整機構
５２雄ネジ
５４コイルバネ受け部
５４ａ凸面部
５４ｂ凹面部
５６フランジ部材
７０揺動規制部
７２凹部
７４ネジ
８０回転軸
８２ブッシュ
８４Ｃリング
８６受け部材
８６ａ円盤部
８６ｂ凸部
８６ｃ溝部
１００椅子
１１０座部
１１２反力受け部
１１４背もたれ用回転軸
１２０背もたれ部
１３０脚部 10 Shock absorber 20 Container body 22 Side wall 22a Through hole 24 Front wall 24a Female screw 24b Flange 26 Bottom wall 30 Interlocking member 32 Side wall 32a Through hole 34 Rear wall 34a Through hole 34b Groove 36 Bottom wall Part 36a Claw part 38 Upper wall part 40 Compression coil spring 50 Compression amount adjustment mechanism 52 Male screw 54 Coil spring receiving part 54a Convex surface part 54b Concave surface part 56 Flange member 70 Swing regulation part 72 Recession 74 Screw 80 Rotating shaft 82 Bush 84 C ring 86 Receiving member 86a Disc part 86b Convex part 86c Groove part 100 Chair 110 Seat part 112 Reaction force receiving part 114 Rotating shaft for backrest 120 Backrest part 130 Leg part

Claims

It is possible to tilt about the backrest rotation shaft provided on the seat with respect to the seat of the chair, and buffer the tilt of the backrest having a rod-shaped reaction force receiving portion extending below the backrest rotation shaft. It ’s a shock absorber,
A container main body that is attached to the seat and has a pair of side walls and a front wall so that the rear is open.
Swingably mounted in the longitudinal direction of the chair to the pair of side wall portions of the container body, a link member having a pair of side wall portions and the rear wall portion so as front open, a pair of side walls that A portion is attached around the pair of side wall portions of the container body portion and a rotation axis, and the rear wall portion of the interlocking member is attached to the front wall portion of the container body portion as the backrest portion tilts. An interlocking member that swings closer and
It is arranged in the front-rear direction in a compressed state between the front wall portion of the container body portion and the rear wall portion of the interlocking member, and the rear wall portion of the interlocking member is the front wall of the container body portion. A compression coil spring that applies a compression restoration force in the front-rear direction away from the portion to the rear wall portion of the interlocking member, and
A compression amount adjusting mechanism provided on the front wall portion of the container body portion and adjusting the compression amount of the compression coil spring is provided.
The compression amount adjusting mechanism includes a male screw screwed into the front wall portion of the container body, and a coil spring receiver arranged between the tip of the male screw and the end of the compression coil spring on the male screw side. have a part and,
The compression coil spring is a shock absorber that is compressed in the forward direction by the reaction force receiving portion when the backrest portion of the chair is tilted about the rotation shaft for the backrest.

The shock absorber according to claim 1, wherein the compression amount adjusting mechanism has a coil spring receiving portion at an end portion of the compression coil spring.

The coil spring receiving portion has convex and concave portions at both ends, respectively.
When viewed from the direction in which the compression restoring force of the compression coil spring is applied,
The convex portion of the convex surface portion is located at the center of the ring shape on the male screw side of the compression coil spring.
The end of the compression coil spring on the male screw side is located around the convex portion.
Ring-shaped center on the male screw side The concave portion of the concave surface portion is located at the ring-shaped center on the male screw side of the compression coil spring.
The shock absorber according to claim 1 or 2, wherein the tip of the male screw is located in the concave portion of the concave surface portion.

Furthermore, Bei give a swing regulating portion that regulates the swingable range of the interlocking member,
The rocking restricting portion is attached to the bottom wall portion of the container main body portion, and the claw portion extending downward from the bottom wall portion of the interlocking member in the recess formed in the rocking restricting portion. The shock absorber according to any one of claims 1 to 3, wherein the shock absorber swings.

The shock absorber according to any one of claims 1 to 4,
The seat provided with the shock absorber and
A chair provided with a backrest that can be tilted with respect to the seat.