JP2004248943A

JP2004248943A - Device for turning and stopping chair seat part

Info

Publication number: JP2004248943A
Application number: JP2003043767A
Authority: JP
Inventors: Toshiaki Kawakami; 利明川上
Original assignee: Oohiro Works Ltd
Current assignee: Oohiro Works Ltd
Priority date: 2003-02-21
Filing date: 2003-02-21
Publication date: 2004-09-09
Anticipated expiration: 2023-02-21
Also published as: JP4296005B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for turning/stopping chair seat part for contributing to compact conversion without specially requiring a disk part which is conventionally adopted to stop the turning of a chair seat part. <P>SOLUTION: The device includes: a rotary member 2 which is arranged to support the chair seat part 4 so as to be turnable with respect to a base part 1 which is placed on a floor surface, etc., in an immobile state in the case of sitting in the seat; and fixing members 3. The turning member 2 is disposed to be turned with respect to the base part 1, and includes a turn stopping recessed part 21 on the side surface of the turning member 2. The turning of the rotary member 2 is stopped by allowing a tip fixing element 31 energized by energizing means 32 being the fixing member 3 to be fitted to the turn stopping recessed part 21. Consequently, the disk part exposed from the base part is not required, and then, for the portion of it, the device for turning/stopping the chair seat part is made to be compact. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本願発明は、理美容用等の椅子の座部を回動及び停止させることができる、椅子座部の回動・停止装置に関するものである。
【０００２】
【従来の技術】
【特許文献１】
特開平８−５６７７０号公報
【０００３】
理美容院で用いられる椅子は、カット等の施術時には、着席者が鏡に対向する方向に椅子座部を向けることができ、着席者が着席・離席する際には、鏡とは反対の方向や横方向等、使い易い方向に向けられるように、椅子座部を回動及び停止可能としている。
【０００４】
上記のように、椅子座部を回動及び停止可能とするために、椅子には椅子座部の回動・停止装置が設けられる。
これは、特開平８−５６７７０号公報（特許文献１）に記載のようなものが存在しており、例えば床面に固定されるベース部に、油圧駆動により昇降可能な昇降台が設けられ、その昇降台の先端部分に回動軸が設けられている。そして、この回動軸に椅子座部が接続される。
この回動軸には、外周方向に突出するようにして円盤部が形成されている。この円盤部には切欠が形成されており、昇降台に弾性支持されたローラーが円盤部の外周に常時、回動可能に当接している。この円盤部は、椅子座部の回動に伴って回動し、上記のローラーが円盤部の切欠に嵌まった際には、円盤部の回動が停止し、これにより椅子座部の回動も停止させることができる。
【０００５】
【発明が解決しようとする課題】
この従来の椅子座部の回動・停止装置においては、上記のような、切欠を有する円盤部が必要であり、この円盤部が昇降台の外部に露出していたため、椅子座部の回動・停止装置をコンパクト化する際の障害になっていた。
よって本願発明は、椅子座部の回動を停止させるための円盤部が特に必要でなく、コンパクト化に貢献することのできる、椅子座部の回動・停止装置を提供することを課題とする。
【０００６】
【課題を解決するための手段】
上記課題を解決するために、本願の請求項１に記載の発明は、床面に置かれたり、壁面に固定される等して、着座時には不動の状態となるベース部１に対し、椅子座部４を回動可能に支持するために設けられる、椅子座部の回動・停止装置において、この装置は、回動部材２と固定部材３とを有するものであり、回動部材２は、ベース部１に対して回動可能に配位されたものであり、回動部材２の側面には回動停止用凹部２１を備えたものであり、固定部材３は、ベース部１に形成された固定用穴１７に配位されたものであり、固定部材３は、先端固定子３１と、先端固定子３１を回動部材２の側面に対して常時当接させるための付勢手段３２とを有し、上記の回動停止用凹部２１に先端固定子３１の少なくとも一部が嵌まることによって、回動部材２の回動を停止させることができることを特徴とする、椅子座部の回動・停止装置を提供する。
【０００７】
又、本願の請求項２に記載の発明は、請求項１に記載の発明において、ベース部１には、有底の受容穴１４が形成されており、回動部材２は、受容穴１４の内部に回動可能に配位される挿入部２ａと、挿入部２ａの上部に形成され、椅子座部４に連結される連結部２ｂとを有し、回動部材２は、上下方向に伸びる中心軸Ｃに対して回転対称である立体形状を有するものであり、回動部材２の底面２２の中央部分は、受容穴１４の底面１５に対して点接触する接触点２３ａを有するものであり、これにより、回動部材２が中心軸Ｃを中心として回動可能であることを特徴とする、椅子座部の回動・停止装置を提供する。
【０００８】
上記の請求項１に記載の発明にあっては、ベース部１の固定用穴１７に配位された固定部材３の先端固定子３１が、回動部材２の回動停止用凹部２１に嵌まることによって、回動部材２の回動を停止させることができるため、従来、ベース部から露出していた円盤部が不要となり、その分コンパクトな椅子座部の回動・停止装置とすることができる。
【０００９】
又、上記の請求項２に記載の発明にあっては、ベース部１における、受容穴１４の底面１５に対して、接触点２３ａにて点接触する回動部材２を配位するものであり、これにより、回動部材２が受容穴１４に対して回動する際の抵抗を少なくでき、従来、滑りを良くするために受容穴に施していた、ふっ素樹脂加工等の特殊加工を廃することができる。
【００１０】
【発明の実施の形態】
以下、図面に基づき、本願発明の実施の一例を取り上げて説明する。図１は、本例の椅子座部の回動・停止装置を取り付けたベース部を示す斜視説明図であり、図２は、本例の椅子座部の回動・停止装置における回動部材を示す側面視説明図であり、図３は、本例の椅子座部の回動・停止装置を取り付けたベース部の要部拡大端面図である。
【００１１】
まず、本例の椅子座部の回動・停止装置を取り付けるためのベース部１について説明する。このベース部１は、図１に示すようなものであり、本例では、床に置くための基台１１と、基台１１の上部に設けられた昇降台１２とを備え、カバーで覆ったものである。なお、図１に示したものは、床に置いて使用する形態のものであるが、壁面に固定できる形態としても良い。つまり、着席者が着席した際において不動の状態にできるものであれば、種々の形態に変更して実施し得る。
【００１２】
昇降台１２は、それぞれ棒状である根元側昇降アーム１２ａと先端側昇降アーム１２ｂとからなり、先端側昇降アーム１２ｂには座取付部１３が形成されている。昇降台１２は油圧機構（図示しない）により、基台１１に対して昇降可能となっている。そして、先端側昇降アーム１２ｂは、昇降時に常時水平が保たれるようになされており、座取付部１３に取り付けられた椅子座部４が傾かないようになっている。
また、座取付部１３には、回動部材２と固定部材３が備えられている。そして、座取付部１３には、図３に示すような、有底の受容穴１４が形成され、回動部材２の挿入部２ａは、この受容穴１４の内部に配位される。
【００１３】
次に、回動部材２について説明する。回動部材２は、本例では、図２に示すようなものであり、略円筒状である。なお、本願発明における回動部材２の形態は、本例のような形態に限られるものではなく、上下方向に伸びる中心軸Ｃに対して回転対称である立体形状を有するものであれば、例えば、球形や円錐形等、他の形態で実施しても良い。
本例においては、回動部材２の下底面２２の中央に、半球状の接触用突起２３が形成されており、この接触用突起２３が、受容穴１４の底面１５に対して、接触用突起２３の下端部分の接触点２３ａにおいて点接触する。これにより、受容穴１４に対して回動部材２の挿入部２ａを配位した際において、回動部材２が回動可能に支持される。そして、この支持は点接触によるものであるから、回動部材２が受容穴１４に対して回動する際の抵抗を少なくできる。
従来においては、受容穴の内側面をふっ素樹脂等の樹脂で表面処理し、滑りを良くして、回動部材が回動する際の抵抗を減らしていたが、本願発明においては、受容穴１４に上記のような特殊な処理を施さなくても、少ない抵抗で回動させることができるため、椅子座部の回動・停止装置の製造工程を簡略化でき、製造コストを削減できる。
【００１４】
本例においては、回動部材２の側に接触用突起２３を設けたものとしたが、本願発明はこれに限られるものではなく、回動部材２の下底面２２を平坦に形成し、その代わりに受容穴１４の底面１５に突起を形成しても良い。また、接触用突起２３の形状についても、本例のような半球状のものに限られず、円錐形等、種々の形状での実施が可能である。
【００１５】
回動部材２には、抜け止め溝２４が側面に形成されており、ベース部の外部方向から止めねじ１６を取り付け、受容穴１４の内側面から突出させることにより、回動部材２が受容穴１４から抜けてしまうことを防止している。この回動部材２の抜け止めについては、本例のような止めねじ１６に限らず、リベットやピンやキーを受容穴１４の内側面から突出させたり、受容穴１４の上端部分に、リング状の部材を取り付けること等により、同様の効果を奏するものとしても良い。なお、本例においては、受容穴１４と回動部材２との間の隙間にグリスが充填されており、止めねじ１６と回動部材２との間における、回動時の摩擦を軽減している。
【００１６】
回動部材２において、挿入部２ａの上方には連結部２ｂが形成されている。この連結部２ｂは、受容穴１４に挿入部２ａを配位した際に、受容穴１４から露出する部分であって、ここに、図３に示すように椅子座部４が固定される。
具体的には、図２に示すように、連結部２ｂを下方が広がったテーパー状に形成したものであり、この連結部２ｂで椅子座部４の荷重を受けるものである。
【００１７】
連結部２ｂの側面には、図２に示すようなストッパー棒２６が突出して形成されており、このストッパー棒２６に椅子座部４に形成された切欠（図示しない）を引掛けることにより、回動部材２に対して椅子座部４を回動不能に固定することができる。
このストッパー棒２６は、連結部２ｂにねじ込み可能なボルトで形成し、椅子座部４をねじ込んで止めることができるものとしても良い。
【００１８】
ところで、回動部材２の挿入部２ａの側面には、回動停止用凹部２１が形成されている。この回動停止用凹部２１は、本例においては、図２及び図３に示すように、断面形状が円形である有底の穴である。この回動停止用凹部２１に、後述する固定部材３の先端固定子３１が嵌まることにより、回動部材２の回動を停止させることができる。
従来においては、上記のように、受容穴の内側面をふっ素樹脂等の樹脂で表面処理し、滑りを良くして、回動部材が回動する際の抵抗を減らしていたため、円盤部に供えられていた切欠を、単純に本例の回動停止凹部２１に置き換えた場合、上記の表面処理した部分に、先端固定子３１を通す固定用穴１７を加工しなければならず、樹脂がこの固定用穴１７を設けた部分から剥がれてきてしまう恐れもあった。しかし、本例においては、接触用突起２３を形成するために、受容穴１４に上記のような表面処理をする必要もないため、製造が容易である。
なお、この回動停止用凹部２１は、本例では回動部材２の側面の１箇所に設けられているが、異なる複数の箇所に設けることにより、複数の位置で回動部材２の回動を停止できるものとしても良い。
【００１９】
次に、固定部材３について説明する。固定部材３は、先端固定子３１と付勢手段３２とを有するものであり、これらの各々は、ベース部１の座取付部１３に形成され、受容穴１４に対して連通して形成された固定用穴１７に配位されている。
先端固定子３１は、付勢手段３２により常時付勢され、その先端部が回動部材２の側面に当接し、回動停止用凹部２１に一致した際には、回動停止用凹部２１に嵌まるものである。本例においては、剛体により形成された先端チップとして実施され、その形状は略円筒状であって、先端側は円錐台状であり、その反対側には、付勢手段であるコイルばねの端部を受容できる凹部が形成されている。また、この先端固定子３１は、本例においては焼き入れにより硬化させた鋼材を用いており、耐久性を持たせている。この先端固定子３１の材料については、耐久性に優れるものであれば良く、セラミック等、種々の材料を用いることができる。また、この先端固定子３１は、従来のように先端側をローラーを備えるものとして、回動部材２の側面を回動しながら当接するものとしても良い。
【００２０】
付勢手段３２は、先端固定子３１を回動部材２に当接する方向に付勢するものである。本例では、この付勢手段３２としてコイルばねを用いているが、他の形状のばねや、ゴム等の弾性を有する樹脂等、その他の弾性体を用いたものであっても良く、種々に変更できる。
【００２１】
固定用穴１７は、本例においては、受容穴１４の内側面に対して直交するようにして、ベース部１の座取付部１３に形成された貫通穴であり、先端固定子３１と付勢手段３２とを内部に配位しており、受容穴１４と反対側の端部はプラグ３４によって封鎖されている。
固定用穴１７の穴径は、先端固定子３１の外径よりもやや大きく形成されており、固定用穴１７の内部を先端固定子３１が摺動可能となっている。
【００２２】
上記の各要素から椅子座部の回動・停止装置を構成することにより、従来必須であった円盤部を省略することができる。よって、椅子座部の回動・停止装置の高さを減らすことができ、椅子のコンパクト化に貢献することができる。
【００２３】
この椅子座部の回動・停止装置の使用方法は、従来のものと同じであり、回動停止用凹部２１と固定部材３とが一致し、回動停止用凹部２１に先端固定子３１が嵌まった際に、椅子座部４の回動を停止させることができ、その他の状態では椅子座部４が回動自在となる。
よって、回動部材２に設ける回動停止用凹部２１の位置を、例えば、椅子座部が鏡に対向する方向（施術時）と、９０°ずらせた方向（着・離席時）に合わせて形成することにより、上記の２つの方向で、椅子座部を停止させることができる。
なお、回動停止凹部２１に対して先端固定子３１が嵌まっている状態は、椅子座部４を少し力を入れて回動させることにより、容易に解除できるようになされている。
【００２４】
【発明の効果】
本願の請求項１に記載の発明にあっては、ベース部の固定用穴に配位された固定部材の先端固定子が、回動部材の回動停止用凹部に嵌まることによって、回動部材の回動を停止させることができるため、従来、ベース部から露出していた円盤部が不要となり、その分コンパクトな椅子座部の回動・停止装置とすることができる。
【００２５】
又、本願の請求項２に記載の発明にあっては、上記の効果に加え、ベース部における、受容穴の底面に対して、接触点にて点接触する回動部材を配位するものであり、これにより、回動部材が受容穴に対して回動する際の抵抗を少なくでき、従来、滑りを良くするために受容穴に施していた、ふっ素樹脂加工等の特殊加工を廃することができる。
【図面の簡単な説明】
【図１】本願発明の実施の一例に係る椅子座部の回動・停止装置を取り付けたベース部を示す斜視説明図である。
【図２】本例の椅子座部の回動・停止装置における回動部材を示す側面視説明図である。
【図３】本例の椅子座部の回動・停止装置を取り付けたベース部の要部拡大端面図である。
【符号の説明】
１ベース部
１４受容穴
１５底面（受容穴）
１７固定用穴
２回動部材
２ａ挿入部
２ｂ連結部
２１回動停止凹部
２２底面（回動部材）
２３ａ接触点
３固定部材
３１先端固定子
３２付勢手段
４椅子座部
Ｃ中心軸[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair seat rotating / stopping device capable of rotating and stopping a seat of a chair for beauty and beauty.
[0002]
[Prior art]
[Patent Document 1]
JP-A-8-56770
Chairs used in hairdressing salons allow the occupant to turn the chair seat in the direction facing the mirror during treatments such as cutting, and the opposite of the mirror when the occupant sits and leaves. The chair seat can be rotated and stopped so as to be oriented in an easy-to-use direction such as a direction or a lateral direction.
[0004]
As described above, the chair is provided with a rotation / stop device for the chair seat so that the chair seat can be turned and stopped.
This is described in Japanese Patent Application Laid-Open No. 8-56770 (Patent Document 1). For example, a base that is fixed to the floor is provided with a lifting platform that can be raised and lowered by hydraulic drive. A rotating shaft is provided at the tip of the lift table. Then, the chair seat is connected to the pivot shaft.
A disk portion is formed on the rotation shaft so as to protrude in the outer peripheral direction. A notch is formed in the disk portion, and a roller elastically supported by the elevating table always rotatably abuts the outer periphery of the disk portion. The disk portion rotates with the rotation of the chair seat portion, and when the roller fits into the notch of the disk portion, the rotation of the disk portion stops, thereby turning the chair seat portion. Movement can also be stopped.
[0005]
[Problems to be solved by the invention]
In this conventional rotation / stop device for a chair seat, a disk portion having a notch as described above is necessary, and since this disk portion is exposed to the outside of the elevating platform, the rotation of the chair seat portion is required. -This was an obstacle to downsizing the stop device.
Accordingly, an object of the present invention is to provide a chair seat rotating / stopping device that does not particularly require a disk portion for stopping the rotation of the chair seat and can contribute to downsizing. .
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 of the present application provides a chair seat for a base portion 1 which is immovable when seated by being placed on a floor or fixed to a wall surface. In a rotation / stop device of a chair seat portion provided to rotatably support the portion 4, the device has a rotation member 2 and a fixed member 3, and the rotation member 2 The rotation member 2 is rotatably arranged with respect to the base portion 1. The rotation member 2 includes a rotation stop recess 21 on a side surface thereof. The fixing member 3 is formed on the base portion 1. The fixing member 3 includes a tip stator 31, and biasing means 32 for constantly contacting the tip stator 31 with the side surface of the rotating member 2. By fitting at least a part of the tip stator 31 into the rotation stopping recess 21, Characterized in that it is possible to stop the rotation of the moving member 2, provides a rotation-stopping device of the chair seat.
[0007]
According to the invention described in claim 2 of the present application, in the invention described in claim 1, a bottomed receiving hole 14 is formed in the base portion 1, and the rotating member 2 The rotating member 2 includes an insertion portion 2a rotatably disposed inside and a connection portion 2b formed on the upper portion of the insertion portion 2a and connected to the chair seat portion 4, and the rotation member 2 extends in the up-down direction. It has a three-dimensional shape that is rotationally symmetric with respect to the central axis C, and the central portion of the bottom surface 22 of the rotating member 2 has a contact point 23a that makes point contact with the bottom surface 15 of the receiving hole 14. Accordingly, the rotation member 2 is rotatable about the central axis C, and a rotation / stop device for the chair seat portion is provided.
[0008]
According to the first aspect of the present invention, the tip stator 31 of the fixing member 3 arranged in the fixing hole 17 of the base portion 1 is fitted into the rotation stopping recess 21 of the rotating member 2. By turning, the rotation of the rotation member 2 can be stopped, so that the disk portion conventionally exposed from the base portion is not required, and a compact rotation / stop device for the chair seat portion is required. Can be.
[0009]
According to the second aspect of the present invention, the rotating member 2 that makes point contact with the bottom surface 15 of the receiving hole 14 in the base portion 1 at the contact point 23a is arranged. Thereby, the resistance when the rotating member 2 rotates with respect to the receiving hole 14 can be reduced, and special processing such as fluororesin processing, which has been conventionally performed on the receiving hole to improve the sliding, is eliminated. be able to.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective explanatory view showing a base portion to which a chair seat rotating / stopping device of this embodiment is attached. FIG. 2 is a perspective view showing a rotating member of the chair seat rotating / stopping device of this embodiment. FIG. 3 is a side view explanatory view showing the embodiment, and FIG. 3 is an enlarged end view of a main part of a base portion to which a rotation / stop device of a chair seat portion of this example is attached.
[0011]
First, the base 1 for mounting the chair seat rotating / stopping device of the present embodiment will be described. The base unit 1 is as shown in FIG. 1. In this example, the base unit 1 includes a base 11 to be placed on the floor, and an elevating table 12 provided on the top of the base 11, and is covered with a cover. Things. In addition, although the thing shown in FIG. 1 is a form used on a floor, it is good also as a form which can be fixed to a wall surface. That is, as long as it can be immobilized when the occupant is seated, it can be implemented in various forms.
[0012]
The elevating table 12 includes a rod-shaped base-side elevating arm 12a and a tip-side elevating arm 12b, each of which has a seat mounting portion 13 formed on the tip-side elevating arm 12b. The elevating table 12 can be moved up and down with respect to the base 11 by a hydraulic mechanism (not shown). The tip-side elevating arm 12b is always kept horizontal when ascending and descending, so that the chair seat portion 4 attached to the seat attaching portion 13 does not tilt.
Further, the seat mounting portion 13 includes the rotating member 2 and the fixing member 3. A bottomed receiving hole 14 as shown in FIG. 3 is formed in the seat mounting portion 13, and the insertion portion 2 a of the rotating member 2 is arranged inside the receiving hole 14.
[0013]
Next, the rotating member 2 will be described. In this example, the rotating member 2 is as shown in FIG. 2 and has a substantially cylindrical shape. In addition, the form of the rotating member 2 in the present invention is not limited to the form as in the present example. For example, as long as it has a three-dimensional shape that is rotationally symmetric with respect to a central axis C extending in the up-down direction, , A spherical shape, a conical shape, or the like.
In this example, a hemispherical contact projection 23 is formed at the center of the lower bottom surface 22 of the rotating member 2, and the contact projection 23 is in contact with the bottom surface 15 of the receiving hole 14. A point contact is made at a contact point 23a at the lower end portion of 23. Thereby, when the insertion portion 2a of the rotating member 2 is arranged with respect to the receiving hole 14, the rotating member 2 is rotatably supported. Since this support is based on point contact, the resistance when the rotating member 2 rotates with respect to the receiving hole 14 can be reduced.
Conventionally, the inner surface of the receiving hole is surface-treated with a resin such as a fluororesin to improve the slip and reduce the resistance when the rotating member rotates. Even if the special processing as described above is not performed, the rotation can be performed with a small resistance, so that the manufacturing process of the rotation / stop device of the chair seat can be simplified, and the manufacturing cost can be reduced.
[0014]
In the present embodiment, the contact protrusion 23 is provided on the side of the rotating member 2, but the present invention is not limited to this, and the lower bottom surface 22 of the rotating member 2 is formed flat, and Alternatively, a projection may be formed on the bottom surface 15 of the receiving hole 14. Also, the shape of the contact projection 23 is not limited to a hemispherical shape as in this example, and various shapes such as a conical shape can be used.
[0015]
A retaining groove 24 is formed in the side surface of the rotating member 2, and a set screw 16 is attached from the outside of the base portion to protrude from the inner side surface of the receiving hole 14, so that the rotating member 2 14 is prevented from falling off. The retaining member for the rotating member 2 is not limited to the set screw 16 as in the present embodiment, and a rivet, a pin, or a key may be protruded from the inner surface of the receiving hole 14 or a ring-shaped A similar effect may be obtained by attaching the member described above. In the present embodiment, the gap between the receiving hole 14 and the rotating member 2 is filled with grease, and the friction between the set screw 16 and the rotating member 2 during rotation is reduced. I have.
[0016]
In the rotating member 2, a connecting portion 2b is formed above the insertion portion 2a. The connecting portion 2b is a portion exposed from the receiving hole 14 when the insertion portion 2a is arranged in the receiving hole 14, and the chair seat portion 4 is fixed thereto as shown in FIG.
Specifically, as shown in FIG. 2, the connecting portion 2 b is formed in a tapered shape in which the lower part is widened, and the connecting portion 2 b receives the load of the chair seat portion 4.
[0017]
A stopper bar 26 as shown in FIG. 2 protrudes from the side surface of the connecting portion 2b, and a notch (not shown) formed in the chair seat portion 4 is hooked on the stopper bar 26 to rotate the stopper bar 26. The chair seat portion 4 can be fixed to the moving member 2 so as not to rotate.
The stopper bar 26 may be formed by a bolt that can be screwed into the connecting portion 2b, and the stopper bar 26 may be screwed into the chair seat portion 4 and stopped.
[0018]
By the way, on the side surface of the insertion portion 2a of the rotating member 2, a rotation stopping concave portion 21 is formed. In this example, the rotation stopping recess 21 is a bottomed hole having a circular cross-sectional shape, as shown in FIGS. 2 and 3. The rotation of the rotation member 2 can be stopped by fitting the tip stator 31 of the fixing member 3 described later into the rotation stop recess 21.
Conventionally, as described above, the inner surface of the receiving hole is surface-treated with a resin such as fluororesin to improve the slip and reduce the resistance when the rotating member is rotated. If the cutout provided is simply replaced with the rotation stop concave portion 21 of the present example, a fixing hole 17 for passing the tip stator 31 must be formed in the surface-treated portion, and the resin becomes There is also a fear that the fixing hole 17 may be peeled off from the portion where the fixing hole 17 is provided. However, in this example, since the receiving holes 14 do not need to be subjected to the above-described surface treatment in order to form the contact projections 23, the manufacturing is easy.
In this example, the rotation stopping recess 21 is provided at one position on the side surface of the rotation member 2. However, by providing the rotation stopping recess 21 at a plurality of different positions, the rotation member 2 can be rotated at a plurality of positions. May be stopped.
[0019]
Next, the fixing member 3 will be described. The fixing member 3 has a tip stator 31 and a biasing means 32, each of which is formed in the seat mounting portion 13 of the base portion 1 and formed to communicate with the receiving hole 14. It is arranged in the fixing hole 17.
The tip stator 31 is constantly urged by the urging means 32, and when its tip abuts against the side surface of the rotation member 2 and coincides with the rotation stop recess 21, the tip stator 31 is moved to the rotation stop recess 21. It fits. In this example, the tip is formed as a tip formed of a rigid body, the shape is substantially cylindrical, the tip is a truncated cone, and the other end is the end of a coil spring serving as biasing means. A recess is formed to receive the portion. Further, in this embodiment, the tip stator 31 is made of a steel material hardened by quenching, and has durability. The material of the tip stator 31 may be any material having an excellent durability, and various materials such as ceramics can be used. The tip stator 31 may be provided with a roller on the tip side as in the related art, and may be brought into contact with the rotating member 2 while rotating the side surface thereof.
[0020]
The urging means 32 urges the distal end stator 31 in a direction in which it comes into contact with the rotating member 2. In this example, a coil spring is used as the urging means 32. However, a spring having another shape, a resin having elasticity such as rubber, or another elastic body may be used. Can be changed.
[0021]
In the present embodiment, the fixing hole 17 is a through hole formed in the seat mounting portion 13 of the base portion 1 so as to be orthogonal to the inner surface of the receiving hole 14, and is biased against the tip stator 31. Means 32 are arranged inside, and the end opposite to the receiving hole 14 is closed by a plug 34.
The hole diameter of the fixing hole 17 is formed slightly larger than the outer diameter of the tip stator 31, and the tip stator 31 can slide inside the fixing hole 17.
[0022]
By configuring the rotation / stop device of the chair seat portion from the above-described components, the disk portion, which has been conventionally required, can be omitted. Therefore, the height of the rotation / stop device of the chair seat can be reduced, which can contribute to the downsizing of the chair.
[0023]
The method of using the rotation / stop device of the chair seat portion is the same as that of the related art. The rotation stop recess 21 and the fixing member 3 coincide with each other. When fitted, the rotation of the chair seat 4 can be stopped, and in other states, the chair seat 4 becomes freely rotatable.
Therefore, the position of the rotation stopping recess 21 provided in the rotation member 2 is adjusted, for example, in the direction in which the chair seat portion faces the mirror (during the operation) and the direction shifted by 90 ° (during wearing / leaving). By forming, the chair seat can be stopped in the above two directions.
The state where the tip stator 31 is fitted into the rotation stop recess 21 can be easily released by rotating the chair seat portion 4 with a little force.
[0024]
【The invention's effect】
In the invention according to claim 1 of the present application, the tip stator of the fixing member disposed in the fixing hole of the base portion is fitted into the recess for stopping rotation of the rotating member, so that the rotating member is rotated. Since the rotation of the member can be stopped, the disc portion conventionally exposed from the base portion becomes unnecessary, and a compact rotation / stop device for the chair seat portion can be provided.
[0025]
Further, in the invention according to claim 2 of the present application, in addition to the above-described effects, a rotating member that makes point contact at the contact point with the bottom surface of the receiving hole in the base portion is arranged. Yes, this makes it possible to reduce the resistance when the rotating member rotates with respect to the receiving hole, and eliminates special processing such as fluororesin processing that has conventionally been performed on the receiving hole to improve sliding. Can be.
[Brief description of the drawings]
FIG. 1 is a perspective explanatory view showing a base portion to which a rotation / stop device of a chair seat portion according to an embodiment of the present invention is attached.
FIG. 2 is an explanatory side view showing a turning member in the turning / stopping device of the chair seat portion of the present embodiment.
FIG. 3 is an enlarged end view of a main part of a base portion to which a rotation / stop device of a chair seat portion according to the present embodiment is attached.
[Explanation of symbols]
1 base portion 14 receiving hole 15 bottom surface (receiving hole)
17 Fixing hole 2 Rotating member 2a Insertion portion 2b Connecting portion 21 Rotation stop recess 22 Bottom surface (rotating member)
23a contact point 3 fixing member 31 tip stator 32 urging means 4 chair seat C center axis

Claims

The base (1), which is placed on the floor or fixed to the wall surface and becomes immobile when seated,
In a rotation / stop device of a chair seat portion provided to rotatably support a chair seat portion (4),
This device has a rotating member (2) and a fixed member (3),
The rotation member (2) is disposed so as to be rotatable with respect to the base portion (1),
The rotation member (2) has a rotation stop recess (21) on the side surface thereof.
The fixing member (3) is arranged in a fixing hole (17) formed in the base portion (1),
The fixing member (3) has a tip stator (31) and an urging means (32) for constantly bringing the tip stator (31) into contact with a side surface of the rotating member (2),
The rotation of the rotation member (2) is stopped by fitting at least a part of the tip stator (31) into the rotation stop recess (21), and the rotation of the chair seat portion is performed. Start / stop device.

A bottomed receiving hole (14) is formed in the base portion (1).
The rotation member (2) is formed on the insertion portion (2a) rotatably disposed inside the receiving hole (14), and is formed on an upper portion of the insertion portion (2a), and is connected to the chair seat portion (4). And a connecting portion (2b) to be
The rotating member (2) has a three-dimensional shape that is rotationally symmetric with respect to a central axis (C) extending in the vertical direction.
The central portion of the bottom surface (22) of the rotating member (2) has a contact point (23a) that makes point contact with the bottom surface (15) of the receiving hole (14), whereby the rotating member (2) is formed. 2. The device according to claim 1, wherein 2) is rotatable about a central axis (C).