JP2004190581A - Main spring system, method and apparatus for manufacturing main spring system, and equipment using this main spring system - Google Patents

Main spring system, method and apparatus for manufacturing main spring system, and equipment using this main spring system Download PDF

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Publication number
JP2004190581A
JP2004190581A JP2002359764A JP2002359764A JP2004190581A JP 2004190581 A JP2004190581 A JP 2004190581A JP 2002359764 A JP2002359764 A JP 2002359764A JP 2002359764 A JP2002359764 A JP 2002359764A JP 2004190581 A JP2004190581 A JP 2004190581A
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Prior art keywords
mainspring
power transmission
transmission member
mounting
center
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JP2002359764A
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Japanese (ja)
Inventor
Akira Shinpo
晃 真保
Hidetoki Morikuni
栄時 守国
Katsutoshi Furuhata
勝利 古畑
Shoichi Nagao
昭一 長尾
Tasuku Toyama
輔 遠山
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Seiko Epson Corp
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Seiko Epson Corp
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Priority to JP2002359764A priority Critical patent/JP2004190581A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To expand freedom of connection forms with a moved body and provide size reduction of the system in a main spring system having a main spring and a brake portion. <P>SOLUTION: This main spring system 100 comprises the main spring 101; a center member 102 connected with an inner end of the main spring; a main spring accommodation portion 103 connected with an outer end of the main spring and rotatably journaled around an axis of the center member; the brake portion 104 applying braking force between the center member and the main spring accommodation portion; a power transmitting member 105 of which the end portion is fixed at the main spring accommodation portion and which is wrapped around an outer periphery of the main spring accommodation portion; and a support member 106 for supporting both the ends of the center member. The power transmitting member is constituted so as to be drawn freely to the support member. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、ゼンマイ機構及びこれを備えた機器に係り、特に、ダンパー効果を持たせながらゼンマイにより各種被動体を駆動するための駆動手段として好適なゼンマイ機構の構造に関する。
【０００２】
【従来の技術】
一般に、ゼンマイの巻き締め力と、制動部のダンパー効果とを用いて各種の被動体を制御された速度で駆動するゼンマイ機構は種々存在し、たとえば、車載用の開閉トレイや電機炊飯器の蓋などの各種機器において、被動体の動作に高級感を持たせるための駆動機構として用いられている。
【０００３】
上記従来のゼンマイ機構としては、ゼンマイの内端を中心部材に接続し、ゼンマイの外端をゼンマイ収容部に接続し、中心部材とゼンマイ収容部のいずれか一方を出力部として用いるように構成するとともに、中心部材に制動部を接続して、回転出力が制動部によって制動された状態で被動体を駆動するように構成されたものが知られている（以下の特許文献１及び特許文献２参照）。これらのゼンマイ機構は、ゼンマイと制動部とをコンパクトに一体化したものである。
【０００４】
【特許文献１】
特開２００２−１９５１４８号公報
【特許文献２】
特開２００２−２０２０４７号公報
【０００５】
【発明が解決しようとする課題】
しかしながら、上記従来のゼンマイ機構においては、被動体を駆動するための出力部がゼンマイに対して軸線方向の上下位置に設けられているため、出力部と被動体との接続姿勢や接続構造が限定されてしまうとともに、被動体に対する接続部分の小型化が難しいため、ゼンマイ機構全体のさらなるコンパクト化を図ることが困難であるという問題点があった。
【０００６】
特に、近年の各種機器における小型化や多様化の進展によって、ゼンマイ機構を装着する場合の機器内部における収容空間がますます制限される傾向にあり、また、被動体に対する取付姿勢も多様になってきているため、単一の機種で多くの機器に対応することは非常に難しくなってきている。
【０００７】
そこで本発明は上記問題点を解決するものであり、その課題は、ゼンマイと制動部とを有するゼンマイ機構において、被動体との接続態様の自由度を広げるとともに、機構のコンパクト化を図り、特に、被動体との接続部分の小型化を図ることにある。
【０００８】
【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発明のゼンマイ機構は、ゼンマイと、前記ゼンマイの内端に接続された中心部材と、前記ゼンマイの外端に接続されているとともに、前記中心部材の軸線周りに回転可能に軸支されたゼンマイ収容部と、前記中心部材と前記ゼンマイ収容部との間に制動力を与える制動部と、前記ゼンマイ収容部に端部が固定され、前記ゼンマイ収容部の外周に巻回された可撓性を備えた動力伝達部材と、前記中心部材の両端を支持する支持部材と、を有し、前記動力伝達部材は、前記支持部材に対して前記ゼンマイ収容部を回転させながら引き出し可能に構成されていることを特徴とする。
【０００９】
この発明によれば、ゼンマイ収容部の外周に巻回された可撓性を備えた動力伝達部材を設けたことにより、これを出力部として用いることができるため、従来のようにゼンマイの軸線方向に出力部を設ける必要がなくなるから、スペース効率が向上し、ゼンマイ機構自体の体積を低減することができるとともに、可撓性の動力伝達部材が支持部材に対して引き出し可能に構成されているため、被動体との接続部分を小型化することもでき、被動体を直接駆動することも可能になるため、駆動機構全体のコンパクト化を図ることができる。また、動力伝達部材を大きな径で巻き取ることができるので、動力伝達部材に伝わる応力振幅を低く抑えることが可能になり、耐久性を高めることができる。さらに、動力伝達部材を介して受ける応力を中心部材の両端にて支持部材によって支持しているため、安定した動作が可能になるとともに耐久性も向上する。また、可撓性の動力伝達部材を用いることにより、噛み合いショックなどを与えることなく、被動体に連続的で滑らかな動作を与えることができる。さらに、可撓性の動力伝達部材を用いることによって、被動体に対する駆動方向などを適宜に構成することができるため、被動体に対する設置姿勢や連結構造などに対する自由度を高めることができ、汎用性に優れたゼンマイ機構とすることができる。また、動力伝達部材に構造上の自由度があるので、各部品の寸法公差を大きくとることができ、製造コストを低減できる。そのうえ、被動体との接続構造が簡易になり、組立・分解が容易で、メンテナンス性に優れる。
【００１０】
本発明において、前記ゼンマイ収容部は、前記ゼンマイの軸線方向両側において前記中心部材に対して回転可能に軸支されていることが好ましい。これにより、ゼンマイ収容部を中心部材に安定的に軸支することができる。ここで、制動部が、中心部材に対して少なくとも回転方向に接続された制動部材と、当該制動部材に接する制動流体とを有する場合であって、ゼンマイ収容部が制動部の上記制動流体を収容するケースの一部を兼ねているときには、中心部材とゼンマイ収容部との間の制動部側の軸支部分が、上記流体によって潤滑されるように構成することが可能である。このようにすると、潤滑切れを起こす可能性もなく、耐久性を高めることができる。
【００１１】
本発明において、前記動力伝達部材の前記ゼンマイ収容部に固定された端部とは反対側の端部には、被動体に取り付けるための外部取付部材が固定されていることが好ましい。可撓性の動力伝達部材をそのまま被動体に取り付けることは、動力伝達部材の材質や被動体の構成上困難であるため、動力伝達部材の端部に外部取付部材が固定されていることによって、被動体に対する取り付けをより容易に行うことが可能になる。
【００１２】
本発明において、前記外部取付部材は、前記動力伝達部材を取り付けるための取付側面と、該取付側面とは反対側に設けられた、前記外部の部材に係合する係合フックとを有することが好ましい。外部取付部材の取付側面に動力伝達部材を取り付けるとともに、その取付側面とは反対側に係合フックを設けることによって、取付側面上の動力伝達部材の取付部分に影響を与えることなく、外部取付部材の係合フックによって被動体に接続することが可能になる。
【００１３】
本発明において、前記支持部材は、前記ゼンマイ収容部を収容する容器形状を有するとともに、前記動力伝達部材を出し入れ可能に構成された開口部を備えていることが好ましい。支持部材を、ゼンマイ収容部を収容する容器形状に構成することによって、ゼンマイ収容部及びその外周に巻回された動力伝達部材を内部に収容することができるので、動力伝達部材が外部の影響を受けにくくなり、引き出し・引き込み動作の安定性が向上し、異物の混入も低減されるため、耐久性を向上させることができる。また、容器形状に構成することにより支持部材の剛性を高めることができるため、支持部材を用いたゼンマイ機構の固定精度を高めることができるとともに、外部からの衝撃等に対する耐力を高めることができる。
【００１４】
本発明において、前記支持部材は、前記ゼンマイ収容部とほぼ同軸の略円筒形状に構成され、前記開口部は、前記略円筒形状の外周面のうちの軸線方向の一部に設けられ、前記外周面の軸線方向の残部が開口していないことが好ましい。支持部材がゼンマイ収容部とほぼ同軸の略円筒形状に構成されていることによってゼンマイ機構全体をコンパクトに構成できる。また、開口部が略円筒形状の外周面のうちの軸線方向の一部に設けられその軸線方向の残部が開口していないことにより、支持部材の強度をさらに高めることができるので、動力伝達部材に過大な力が加わっても変形しにくくなり、安定した動作が可能になる。ここで、部品製造上、支持部材を、その開口部の軸線方向両側に分割された少なくとも２つの部材が組立られてなるものとすることが望ましい。また、上記開口部は、当該軸線に平行な平面でカットされた開口形状を有することが製造加工を容易化するという点でより好ましい。
【００１５】
本発明において、前記動力伝達部材は条材である場合がある。ワイヤ、ロープ、紐、糸などの条材（線状に構成される部材）であることによって、動力伝達部材に方向性がなくなり、被動体に対する取り回しも容易になる。また、ゼンマイ収容部の外周に螺旋状に巻回させることも可能であるため、巻回部分の外径を増大させずに巻数を増やすことができることから、被動体の動作ストロークを大きくすることができる。
【００１６】
本発明において、前記動力伝達部材は帯材である場合がある。帯材とすることによって厚さを確保しなくても動力伝達部材の強度を高めることができるので、大きな応力にも対応できるとともに、ゼンマイ収容部の外径をコンパクトに構成できる。
【００１７】
本発明において、前記動力伝達部材の前記ゼンマイ収容部に固定された端部とは反対側の端部には、被動体に取り付けるための外部取付部材が固定され、前記動力伝達部材の前記反対側の端部は前記外部取付部材の一側面である取付側面に沿って配置されるとともに固定孔が設けられ、前記取付側面には、前記固定孔に挿通固定された固定突起が設けられていることが好ましい。これによれば、動力伝達部材の端部が取付側面に沿って配置されていることにより、外部取付部材との間に加わる応力が動力伝達部材の一部に集中しにくくなるため、固定部分の強度及び耐久性を向上できる。また、動力伝達部材の端部が外部取付部材の取付側面上に設けられた固定突起に挿通された形で固定されているため、動力伝達部材を取付側面に沿った状態で確実に固定することができる。上記の固定孔と固定突起との固定方法としては、カシメ、溶着、溶接、接着などが考えられる。また、固定突起を外部取付部材と別体に構成し、固定孔に係合させた固定突起を外部取付部材に固定してもよい。
【００１８】
本発明において、前記取付側面上に、前記動力伝達部材よりも突出した突起が設けられていることが好ましい。この突起によって取付側面上の動力伝達部材が外部の他の部材に接触しにくくなるため、動力伝達部材と外部取付部材との固定部分を保護することができる。ここで、この突起は、動力伝達部材と外部取付部材との固定部分の両側に設けられていることが保護効果を高める上でより望ましい。また、この突起は滑らかな曲面状の表面を有することが外部の他の部材との引っ掛かりを低減するために望ましい。
【００１９】
本発明において、前記取付側面上の前記ゼンマイ収容部方向寄りの端部に、前記取付側面から突出する端部突起が設けられていることが好ましい。これによれば、動力伝達部材がゼンマイ収容部に巻き取られた場合において、動力伝達部材と外部取付部材との間に支持部材その他の部材が入り込もうとしたときに、当該部材に端部突起が抵触するため、動力伝達部材と取付側面との間の固定部分に負荷が加わることを防止することができるので、動力伝達部材と外部取付部材との固定部分がまた裂き状に損傷を受けたり破断したりすることを防止できる。
【００２０】
本発明において、前記取付側面には、前記固定突起に対してずれた位置に係合突起が設けられ、前記動力伝達部材には、前記係合突起に係合する係合孔が設けられ、前記係合突起と前記係合孔とは、前記取付側面上において前記固定突起と前記係合突起とを結ぶ方向と直交する方向に余裕を持って係合していることが好ましい。これによれば、動力伝達部材の固定孔及び係合孔が外部取付部材の固定突起及び係合突起に挿入されることによって回転方向の応力を２箇所で受け止めることができるため固定部分の強度や耐久性を高めることができる。また、係合孔と係合突起とが前記固定突起と前記係合突起とを結ぶ方向と直交する方向に余裕を持つため、当該余裕に対応する範囲内において動力伝達部材の取付側面上の取付姿勢を調整することが可能になる。
【００２１】
本発明において、前記ゼンマイ収容部に前記動力伝達部材を取り付けるための取付孔が設けられ、前記動力伝達部材の端部は、前記取付孔の内部に配置される幅広の頭部と、前記取付孔に挿通される幅狭の挿通部とを有し、前記頭部が前記取付孔に係合していることが好ましい。これによれば、溶接・接着などの方法を使用することなく動力伝達部材をゼンマイ収容部に簡単な構造で確実に固定することができる。また、動力伝達部材とゼンマイ収容部との固定部分を薄肉に構成することができる。さらに、動力伝達部材の取り付け・取り外しが容易になるので、組立や分解が容易になる。そのうえ、溶接等の固定に比べて応力集中しにくい構造とすることができるため、取付強度や耐久性を向上できる。ここで、上記取付孔における開口縁のうち、動力伝達部材の引き出し側の縁部をテーパ面（傾斜面）とすることが動力伝達部材の屈折や応力集中をさらに防止する点で望ましい。ここで、上記取付孔を、前記頭部の幅よりも大きい長さを有する延長形状に構成することが望ましい。これによって、動力伝達部材の姿勢を９０度回転させることによって、上記頭部を取付孔に対して容易に出し入れできるようになるため、取付作業及び取り外し作業を容易に行うことが可能になる。
【００２２】
本発明において、前記動力伝達部材の表面に接触し、前記動力伝達部材の表面に付着した異物を除去するための異物除去手段が前記支持部材の前記開口部の開口縁に設けられていることが好ましい。異物除去手段が設けられていることにより、動力伝達部材の表面に付着した異物が支持部材の開口部の開口縁において除去されるため、支持部材の内部においてゼンマイ収容部に動力伝達部材が異物とともに巻き取られていくといったことが防止され、その結果、異物の挟み込みによる動力伝達部材の損傷・磨耗などを防止することができるため、耐久性を高めることができる。ここで、動力伝達部材が帯材である場合には、帯材の表裏にそれぞれ異物除去手段を設けることが望ましい。
【００２３】
本発明において、前記中心部材の端部には、外部に露出し、軸線周りの回転方向に係合可能な回転係合構造が設けられていることが好ましい。中心部材の端部に回転係合構造が設けられていることにより、この回転係合構造に工具などを係合させれば中心部材を外部から回転操作することが可能になるため、ゼンマイ機構に初期力（動力伝達部材が最も引き込まれた状態、或いは、被動体の動作ストローク内において動力伝達部材が最も引き込まれている状態におけるゼンマイの引き込み力（回転トルク）、すなわちプリテンション、以下同様。）を設定する際に、中心部材を回転させて初期力を容易に調整することが可能になる。また、回転係合構造を用いて中心部材の回転を防止することも可能である。回転係合構造としては、凹溝や角穴などが挙げられる。
【００２４】
本発明において、前記中心部材を前記支持部材に対して固定する固定手段が設けられていることが好ましい。この手段によれば、中心部材を支持部材に対して固定手段によって固定することができるため、中心部材を回転させて初期力の設定を行った後に固定手段によって中心部材を支持部材に固定することにより、初期力の設定が保持される。ここで、固定手段は、上記回転係合構造が設けられた一方の端部とは反対側の中心部材の他方の端部を支持部材に固定するように構成されていることが望ましい。これによって、一方の端部の回転係合構造によって中心部材を回転操作したり、中心部材の回転を防止したりすることができるとともに、他方の端部において固定手段により中心部材を支持部材に固定できるので、初期力の設定作業を容易に行うことが可能になる。
【００２５】
本発明において、前記固定手段は、前記中心部材に螺合して前記支持部材を締め付け固定するネジであることが好ましい。これによれば、ねじ込みにより簡単に中心部材と支持部材とを固定できる。
【００２６】
本発明において、前記固定手段と前記支持部材の少なくとも一方における他方に接触する部分に凹部が設けられ、当該凹部には前記固定手段と前記支持部材とを接着する接着剤が配置されていることが好ましい。これによれば、固定手段による締め付けに加えて凹部に配置された接着剤による接着力によって固定手段と支持部材とを強固に固定できる。
【００２７】
本発明において、前記固定手段と前記支持部材の少なくとも一方における他方に接触する部分に凹凸面が設けられていることが好ましい。これによれば、固定手段による締め付けに加えて凹凸面による摩擦力の向上効果が得られるので、固定手段と支持部材とを強固に固定できる。また、固定手段と支持部材との硬度を相互に異なるものとすることによって、一方に設けられた凹凸面が他方の対向面に食い込むように構成することができる。これによって両者をより強固に固定することができる。
【００２８】
本発明において、前記固定手段の締付方向は、前記中心部材が前記ゼンマイにより受ける回転力の回転方向とは逆方向であることが好ましい。これによれば、固定手段の締付方向が中心部材がゼンマイから受ける回転力の回転方向とは逆方向であることにより、中心部材と固定手段との螺合状態は、ゼンマイから受ける回転力によって締め付けられる方向になり、たとえば、動力伝達部材が繰り出されても、その引き出し方向の応力によって固定手段と中心部材との螺合部分が緩むことがなくなる。
【００２９】
本発明において、前記中心部材と前記支持部材との間に、前記ゼンマイの巻き締め方向には前記中心部材の回転を許容し、前記巻き締め方向とは逆方向には前記中心部材の回転を禁止するワンウェイクラッチ機構が設けられていることが好ましい。これによれば、ワンウェイクラッチ機構によって、中心部材を回転操作しゼンマイを巻き締めて初期力を簡単に設定することができ、また、一旦設定された初期力は、逆方向には回転しないワンウェイクラッチ機構によってそのまま保持される。ここで、中心部材の端部に回転係合構造が設けられ、この回転係合構造が外部に露出していることが望ましい。これによって中心部材を容易に回転させることができるため、ワンウェイクラッチ機構を介した初期力の設定作業を容易に行うことができる。
【００３０】
本発明において、前記中心部材は、前記ゼンマイの内端に接続された第１中心部材と、前記制動部に接続された第２中心部材とを有し、前記第１中心部材と前記第２中心部材が同軸で回転方向に係合し、かつ、着脱可能に構成されていることが好ましい。これによれば、第１中心部材、ゼンマイ及びゼンマイ収容部と、第２中心部材及び制動部とを別々のユニットとして組み立ててから、それぞれのユニットについて品質検査を行った後に、両ユニットを相互に組み付けることが可能であるため、不良品の早期発見が可能になるとともに、組み立て完了後においても分解が容易になる。
【００３１】
本発明において、前記ゼンマイ収容部には、その外周壁の一部が切断されて内側に突出してなる係合突部が設けられ、当該係合突部に前記ゼンマイの外端が係合していることが好ましい。これによれば、簡単な構造で、しかも、簡単な作業でゼンマイの外端とゼンマイ収容部とを接続することができる。
【００３２】
本発明において、前記動力伝達部材の前記ゼンマイ収容部に対する取付位置は、前記ゼンマイの前記ゼンマイ収容部に対する取付位置に対し、前記ゼンマイの渦巻き方向両側の近傍に設けられていることが好ましい。これによれば、動力伝達部材は、ゼンマイ収容部に対するゼンマイの取付位置よりも、前記ゼンマイの渦巻き方向両側の近傍において取り付けられているため、ゼンマイが巻き解かれた状態でも、ゼンマイの端部が上記係合突部に係合した位置の渦巻き方向両側の近傍では、ゼンマイ収容部の内面とゼンマイとの間にはわずかな隙間が存在するため、動力伝達部材をゼンマイ収容部に対して支障なく（すなわち巻き解かれたゼンマイに邪魔されることなく）取り付けることができる。特に、動力伝達部材の端部がゼンマイ収容部に設けられた取付孔に挿入係合することによって取り付けられる場合には、動力伝達部材の端部がゼンマイに妨げられて取付孔に挿入できなくなるといった事態を回避できる。ここで渦巻き方向両側の近傍とは、ゼンマイの取付位置に対して約４５度以内の角度範囲にある部分を言う。特に、当該角度範囲が約３０度以内であることが望ましい。
【００３３】
本発明において、前記ゼンマイ収容部は略円筒状の内面を有し、前記ゼンマイの外端は、当該内面に対して摺接し、その拡径力により前記内面との間に生ずる摩擦力に基づいて前記ゼンマイ収容部との接続が確保されているとともに、過剰な回転力を受けた場合には前記ゼンマイ収容部の前記内面上を摺動可能に構成されていることが好ましい。これによれば、上記のようにゼンマイの外端（スリッピングアタッチメント）を構成することによって、ゼンマイとゼンマイ収容部との間に通常の係合構造を設けることが不要になり、部品加工作業や組み立て作業も容易になるため製造コストを低減できる。
【００３４】
本発明において、前記中心部材には、前記ゼンマイの内端に係合する係合突起を有し、当該係合突起の軸線方向の上側若しくは下側のうちいずれか一方側の側面は、前記軸線方向斜め上側若しくは下側に向いた傾斜面となっていることが好ましい。これによれば、ゼンマイの内側に中心部材を挿入する場合に、上記傾斜面によってゼンマイの中心部を係合突起に誘導することができるので、中心部材とゼンマイとの組み付けや接続作業が容易になる。また、ゼンマイの内端に無理な負荷を与えなくなるため、ゼンマイ機構の品質の向上を図ることが可能になる。
【００３５】
（製造方法）
次に、本発明のゼンマイ機構の製造方法は、ゼンマイと、前記ゼンマイの内端に接続された中心部材と、前記ゼンマイの外端に接続されているとともに、前記中心部材の軸線周りに回転可能に軸支されたゼンマイ収容部と、前記中心部材と前記ゼンマイ収容部との間に制動力を与える制動部と、前記ゼンマイ収容部に端部が固定され、前記ゼンマイ収容部の外周に巻回された動力伝達部材と、前記中心部材の両端を支持する支持部材とを有し、前記支持部材に対して前記動力伝達部材を引き出し可能に構成されるゼンマイ機構の製造方法であって、前記動力伝達部材の引き出し量を変化させながら前記動力伝達部材の引き込み力を測定し、既定の前記引き込み力が得られたときに、前記動力伝達部材を既定位置で切断し、これにより得られた前記動力伝達部材の端部に、外部の部材に取り付けるための外部取付部材を接続させることを特徴とする。
【００３６】
この製造方法によれば、動力伝達部材の引き出し量を調整するだけで（すなわち、中心部材を支持部材に対して回転操作するなどの操作を行うことなく）、必要な初期力を設定することができる。ただし、この方法では、切断した後の動力伝達部材に引き出し動作に必要な長さが残っていなければならないため、予め十分な長さの動力伝達部材をゼンマイ収容部に巻回させておく必要がある。また、この方法は、通常、中心部材を支持部材或いはその他の部材に対して回転方向に固定した状態で行う。
【００３７】
また、本発明の別のゼンマイ機構の製造方法は、ゼンマイと、前記ゼンマイの内端に接続された中心部材と、前記ゼンマイの外端に接続されているとともに、前記中心部材の軸線周りに回転可能に軸支されたゼンマイ収容部と、前記中心部材と前記ゼンマイ収容部との間に制動力を与える制動部と、前記ゼンマイ収容部に端部が固定され、前記ゼンマイ収容部の外周に巻回された動力伝達部材と、前記中心部材の両端を支持する支持部材とを有し、前記支持部材に対して前記動力伝達部材を引き出し可能に構成されるゼンマイ機構の製造方法であって、前記ゼンマイ収容部の外面に凹部を形成し、次に、当該凹部の内部を切断して前記ゼンマイ収容部の内側に突出させることにより、前記ゼンマイの外端を係合させるための係合突部を形成することを特徴とする。
【００３８】
この製造方法によれば、予めゼンマイ収容部の外面に凹部を形成し、この凹部の内部を切断してゼンマイ収容部の内側に突出させることにより、係合突部の先端に、凹部を形成する際に加工された部分が存在することとなるため、係合突部の先端形状を、ゼンマイの外端と係合しやすい形状にすることができるとともに、係合突部の先端に、加工時に生じ得るカエリ（破断時に生ずるバリ）が残ることを防止することもできる。特に、係合突部の先端に斜面が形成されるように、予め形状を勘案して凹部を形成しておくことにより、ゼンマイの外端を容易かつ確実に係合させることができる。
【００３９】
次に、本発明のさらに別のゼンマイ機構の製造方法は、ゼンマイと、前記ゼンマイの内端に接続された中心部材と、前記ゼンマイの外端に接続されているとともに、前記中心部材の軸線周りに回転可能に軸支されたゼンマイ収容部と、前記中心部材と前記ゼンマイ収容部との間に制動力を与える制動部と、前記ゼンマイ収容部に端部が固定され、前記ゼンマイ収容部の外周に巻回された動力伝達部材と、前記中心部材の両端を支持する支持部材と、前記中心部材と前記支持部材を固定する固定手段とを有し、前記支持部材に対して前記動力伝達部材を引き出し可能に構成されるゼンマイ機構の製造方法であって、前記固定手段による前記中心部材と前記支持部材の固定状態を解除し、前記動力伝達部材の引き出し量を適宜に設定して、前記中心部材を回転させながら前記動力伝達部材の引き込み力を測定し、前記引き込み力が既定値になったときに、前記固定手段により前記中心部材と前記支持部材を固定することを特徴とする。
【００４０】
この製造方法によれば、動力伝達部材を所定の引き出し量に設定した状態で中心部材を回転させ、これに応じて変化する引き込み力が既定値になったときに中心部材を固定することによって、初期力の微調整が容易になるため、ゼンマイ機構の初期力を正確かつ確実に設定することが可能になる。
【００４１】
（製造装置）
次に、本発明のゼンマイ機構の製造装置は、ゼンマイと、前記ゼンマイの内端に接続された中心部材と、前記ゼンマイの外端に接続されているとともに、前記中心部材の軸線周りに回転可能に軸支されたゼンマイ収容部と、前記中心部材と前記ゼンマイ収容部との間に制動力を与える制動部と、前記ゼンマイ収容部に端部が固定され、前記ゼンマイ収容部の外周に巻回された動力伝達部材と、前記中心部材の両端を支持する支持部材と、前記中心部材と前記支持部材を固定する固定手段とを有し、前記支持部材に対して前記動力伝達部材を引き出し可能に構成されるゼンマイ機構の製造装置であって、前記支持部材を固定するための固定台と、当該固定台に前記支持部材が固定された設置状態において前記中心部材に接続されて前記中心部材を回転させるための回転伝達機構と、前記設置状態で前記動力伝達部材を既定の引き出し量を有する状態に保持するとともに、前記動力伝達部材の引き込み力を測定する応力検出手段と、を有することを特徴とする。
【００４２】
（機器）
次に、本発明の機器は、上記いずれかに記載のゼンマイ機構と、当該ゼンマイ機構の前記動力伝達部材若しくは前記外部取付部材に接続された被動体とを有することを特徴とする。
【００４３】
この発明によれば、機器において、ゼンマイと制動部とによって被動体を制御された速度で駆動することができる。また、ゼンマイ機構と被動体との取付態様の自由度が高いため、被動体の動作方向やゼンマイ機構との取付姿勢などの設計上の自由度が向上し、数多くのバリエーションを構成できる。また、ゼンマイ機構及びその被動体との取付構造を小型化することができるので、機器全体をコンパクトに構成できる。
【００４４】
本発明において、前記被動体の動作ストロークの範囲内において、前記動力伝達部材の前記ゼンマイ収容部に取り付けられてなる取付部分は、巻回された前記動力伝達部材の上層部分に常に覆われるように構成されていることが好ましい。この発明によれば、被動体の動作ストロークの範囲内においては常にゼンマイ収容部に対する動力伝達部材の取付部分が動力伝達部材の上層部分に覆われた状態となっていることにより、被動体の動作に伴って上記の取付部分に動力伝達部材の上層部分が直接当接したり離反したりといったことを繰り返すことがなくなるため、動力伝達部材の損傷や取付部分の損傷を防止することができ、耐久性を向上させることができる。
【００４５】
【発明の実施の形態】
次に、添付図面を参照して本発明に係るゼンマイ機構、ゼンマイ機構の製造方法、及び、機器の実施形態について詳細に説明する。図１は、本実施形態のゼンマイ機構１００の外観を示す斜視図、図２は、ゼンマイ機構１００の縦断面図である。
【００４６】
ゼンマイ機構１００は、ゼンマイ１０１と、このゼンマイ１０１の内端に接続された中心部材１０２と、ゼンマイ１０１の外端に接続されたゼンマイ収容部１０３と、中心部材１０２に接続された制動部１０４と、ゼンマイ収容部１０３の外周に巻回された可撓性の動力伝達部材１０５と、中心部材１０２の両端を支持する支持部材１０６とを有する。なお、本明細書において、上記のゼンマイ収容部１０３は、中心部材１０２に対して回転可能に軸支されている部分全体を包含するものとする。また、中心部材１０２は、固定ネジなどで構成される固定手段１０７に螺合され、この固定手段１０７は、支持部材１０６を中心部材１０２に対して締め付け固定している。
【００４７】
中心部材１０２は、ゼンマイ１０１の内端に接続された係合部１０２ａを有する。そして、中心部材１０２は、上記係合部１０２ａの軸線方向両側において、ゼンマイ収容部１０３を回転可能に軸支している。また、中心部材１０２の一方の端部（図示上端部）には上記固定手段１０７に螺合する雌ネジ部１０２ｂを有する。さらに、中心部材１０２の他方の端部（図示下端部）には角穴などで構成される回転係合構造１０２ｃが設けられている。この回転係合構造１０２ｃは、支持部材１０６に覆われることなく外部に露出している。
【００４８】
上記固定手段１０７は、中心部材１０２に螺合して、支持部材１０６を締め付け、当該支持部材１０７を中心部材１０２に固定する。このとき、支持部材１０６と固定手段１０７の接触面の少なくとも一方に凹部を設け、この凹部に接着剤を流し込んで支持部材１０６と固定手段１０７とを接着することにより、より強固に固定することができる。また、支持部材１０６と固定手段１０７の接触面の少なくとも一方に、回転方向に凹凸（粗面でもよい。）を形成し、両者間の摩擦を増大させることによって、或いは、両者の接触面同士を互いに食い込ませることによっても、固定力をより高めることができる。特に、一方の硬度を相対的に高く、他方の硬度を相対的に低くすることによって、一方に形成した凹凸面が他方の接触面に食い込みやすく構成することができる。たとえば、一方をステンレス鋼、他方をアルミニウム若しくはアルミニウム合金などで構成することができる。
【００４９】
なお、固定手段としては、上記のように中心部材１０２に螺合して支持部材１０６に対して締め付けられるものに限らず、中心部材１０２と支持部材１０６とを相対的に固定可能なものであればよい。たとえば、中心部材１０２と支持部材１０６とを接着固定、溶接、かしめなどによって固定するもの、中心部材１０２と支持部材１０６の一方に打ち込まれ、他方に係合する打込み部材（たとえば、支持部材に形成された角孔に嵌合する多角形の頭部をもつピンであって、中心部材に打ち込まれるように構成されているものなど）が挙げられる。また、上記の複数の固定手段に用いられている固定方法の２以上を併用したものでもよい。
【００５０】
ゼンマイ収容部１０３は、図２に示すように、軸線方向の一方側（図示上側）において中心部材１０２に軸支された上ケース１０３Ａと、軸線方向の他方側（図示下側）において中心部材１０２に軸支された下ケース１０３Ｂとを有する。この下ケース１０３Ｂは、下制動ケース１０４Ａとともに制動部１０４のケース体を構成する。ゼンマイ収容部１０３は、全体として中心部材１０２とほぼ同軸の両端が閉塞された円筒形状に構成されている。
【００５１】
なお、上述のように、ゼンマイ収容部１０３は、中心部材１０２に対して回転可能に軸支された部分全体を包含するので、ゼンマイ収容部１０３には、上記下制動ケース１０４Ａをも包含した概念である。したがって、本実施形態では、動力伝達部材１０５が上ケース１０３Ａの外周に巻回されているが、本発明においては、動力伝達部材１０５が下制動ケース１０４Ａの外周に巻回されている場合をも包含する。
【００５２】
制動部１０４は、上記の下ケース１０３Ｂと下制動ケース１０４とによって構成されるケース体の内部に、中心部材１０２に対して回転方向に係合した制動部材１０４Ｂが配置され、この制動部材１０４Ｂは、上記ケース体の内部に配置されたオイルなどの制動流体１０４Ｃに浸漬された状態となっている。制動部１０４の制動力は、制動部材１０４Ｂが上記ケース体の内部において制動流体１０４中を回転しようとするときに発生する粘性抵抗により発生する。
【００５３】
動力伝達部材１０５は可撓性の帯材、たとえば、可撓性を有するステンレス鋼などの金属製の帯で構成されている。ゼンマイ収容部１０３の外周面には環状の凹溝が形成され、この凹溝内において動力伝達部材１０５が巻回されている。動力伝達部材１０５の図示しない内端部は後述する態様でゼンマイ収容部１０３に固定されている。動力伝達部材１０５の外端部は、図１に示すように、外部取付部材１０８に固定されている。外部取付部材１０８は、一方の側面が動力伝達部材１０５の外端部が取り付けられた取付側面１０８Ａとなっており、この取付側面１０８Ａとは反対側に係合フック１０８Ｂが設けられている。
【００５４】
支持部材１０６は、ゼンマイ収容部１０３を収容する容器形状に構成されている。より具体的には、支持部材１０６は、中心部材１０２とほぼ同軸に構成された両端が閉塞された円筒形状をしている。支持部材１０６は、上ケース１０６Ａと、下ケース１０６Ｂとが軸線方向に嵌合されてなる。上ケース１０６Ａは中心部材１０２の一方の端部を支持している。上ケース１０６Ａの一部には、軸線と平行な平面でカットした形状の開口部１０６ａが設けられている。この開口部１０６ａは、図示例では、上ケース１０６Ａの軸線方向の一部（上部）にのみ設けられ、上ケース１０６Ａの残部（図示下端部）は開口していない。これによって上ケース１０６Ａの剛性（強度）を高めることができる。もっとも、上ケース１０６Ａの軸線方向全体に亘って軸線と平行な平面でカットした形状の開口部を設けても構わない。
【００５５】
下ケース１０６Ｂには、機器などに取り付け固定するための１又は複数の突起部１０６ｂが設けられている。また、下ケース１０６Ｂの中心部には中心開口１０６ｃが設けられ、この中心開口１０６ｃに中心ケース１０６Ｃが嵌合されている。この中心ケース１０６Ｃは、中心部材１０２の他方の（図示下側の）端部を支持している。
【００５６】
図３は、上記の外部取付部材１０８の構造を詳細に示す横断面図（ａ）、側面図（ｂ）及び外面図（ｃ）である。外部取付部材１０８は全体としてＬ字型形状を有する。外部取付部材１０８の取付側面１０８Ａには、貫通孔１０８ａが開口するとともに、その開口のゼンマイ収容部１０３側の端部に係合突起１０８ｂが突出形成されている。一方、動力伝達部材１０５の端部には、上記貫通孔１０８ａに対応して固定孔１０５ａが設けられ、また、上記係合突起１０８ｂに対応する係合孔１０５ｂが設けられている。固定孔１０５ａと係合孔１０５ｂとは動力伝達部材１０５の延長方向に配置されている。ここで、この構成例は、固定孔１０５ａを貫通孔１０８ａの開口上に配置し、係合孔１０５ｂを上記係合突起１０８ｂに嵌合させた状態で、固定ピン１０９を固定孔１０５ａと貫通孔１０８ａに挿通し、外部取付部材１０８に固定することによって構成される。すなわち、動力伝達部材１０５は、固定ピン１０９の拡大された頭部によって動力伝達部材１０５が押さえられた状態とされ、固定ピン１０９が外部取付部材１０８に対してカシメ、溶着、溶接などの固着手段によって固定されることによって、取付側面１０８Ａ上に固定されている。
【００５７】
この場合、図３（ｂ）に示すように、固定孔１０５ａに固定ピン１０９を挿通し、係合孔１０５ｂに係合突起１０８ｂを嵌合させた状態において、係合孔１０５ｂと係合突起１０８ｂとの間には、上記取付側面１０８Ａ上であって動力伝達部材１０５の延長方向と直交する方向（図３（ｂ）の図示上下方向）に余裕が設けられている。このため、製造段階において、動力伝達部材１０５の外部取付部材１０８に対する取付姿勢をある程度の範囲内で調整できるようになっている。このように力伝達部材１０５の取付姿勢を調整し、動力伝達部材１０５の外部取付部材１０８に対する取付姿勢が一旦決定されれば、固定ピン１０９の頭部を動力伝達部材１０５に強く押し付けた状態とし、上記の方法で固定ピン１０９を外部取付部材１０８に固定することによって、動力伝達部材１０５を外部取付部材１０８に所定姿勢で固定することができる。このとき、固定ピン１０９の頭部は、取付側面１０８Ａ上に設けられた固定突起として機能する。
【００５８】
なお、上記のように動力伝達部材１０５を外部取付部材１０８に完全に固定するのではなく、動力伝達部材１０５が取付側面１０８Ａ上で回転可能な状態で保持されるように構成することもできる。この場合には、外部取付部材１０８が動力伝達部材１０５に対して姿勢変更可能に構成されていることになるので、駆動時のブレを吸収し、応力による破断を防止する効果を持たせることが可能になる。このとき、上記の係合孔１０５ｂと係合突起１０８ｂとの余裕（すなわち、固定突起と係合突起とを結ぶ方向と直交する方向の係合余裕）によって姿勢変更の範囲が定まることになる。当該余裕は、係合孔１０５ｂの開口径の１０％程度とすることが好ましい。
【００５９】
外部取付部材１０８には、取付側面１０８Ａ上に突出した保護用突起１０８ｃが設けられている。この保護用突起１０８ｃは凸曲面状の滑らかな表面を備えている。保護用突起１０８ｃの高さは、取付側面１０８Ａ上に固定された動力伝達部材１０５の端部よりも高くなるように構成されている。この保護用突起１０８ｃによって、外部取付部材１０８が他の部材に接触したとき、取付側面１０８Ａ上にある、動力伝達部材１０５、或いは、その取付部分が当該他の部材に接触することが防止される。なお、この保護用突起１０８ｃは取付側面１０８Ａの先端側に設けられているが、取付側面１０８Ａの如何なる部分に設けても構わない。また、上記の係合突起１０８ｂを動力伝達部材１０５よりも高く形成することによって保護用突起としても用いることができる。この場合、動力伝達部材１０５の取付部分の両側にそれぞれ保護用突起が設けられていることとなるため、より効果的である。
【００６０】
また、上記の係合突起１０８ｂは取付側面１０８Ａの基端（すなわちゼンマイ収容部１０３側）に設けられているため、動力伝達部材１０５が引き込まれて外部取付部材１０８が支持部材１０６の開口部１０６ａの開口縁に接触したとき、係合突起１０８ｂが端部突起として機能し、当該開口縁が動力伝達部材１０５と取付側面１０８Ａとの間に侵入しようとすることを防止できる。すなわち、支持部材１０６の開口縁が動力伝達部材１０５と取付側面１０８Ａとの間に侵入しようとすると、動力伝達部材１０５の外部取付部材１０８に対する取付部分がまた裂き状に変形したり、極端な場合には動力伝達部材１０５が外部取付部材１０８から剥がれてしまう恐れがあるが、本実施形態では、係合突起１０８ｂが取付側面１０８Ａの基端に設けられていることによって、支持部材１０６の開口縁は常に係合突起１０８ｂに当接するため、上記のような事態の発生を防止できる。ここで、本実施形態では、動力伝達部材１０５に係合する係合突起１０８ｂが上記機能を有する端部突起を兼ねているが、係合突起１０８ｂとは別に端部突起を設けても構わない。たとえば、動力伝達部材１０５の幅方向両側にそれぞれ端部突起を突出させるようにしてもよい。
【００６１】
図３（ｄ）は、上記外部取付部材１０８とは異なる構造を有する外部取付部材１０８′の平面図、図３（ｅ）は、外部取付部材１０８′の横断面図である。この外部取付部材１０８′には、その取付側面１０８Ａ′上に、上記と同様の係合突起１０８ｂ′及び保護用突起１０８ｃ′が設けられているが、さらに、上記構造とは異なり、固定突起１０８ａ′が一体に設けられている。この固定突起１０８ａ′に、動力伝達部材１０５の固定孔１０５ａを挿通させた状態で、図示上方から工具で加圧し、固定突起１０８ａ′を塑性変形させる（加締める）ことによって、動力伝達部材１０５を固定できるように構成されている。なお、その他の構造については上記外部取付部材１０８と同様であるので、それらの説明を省略する。
【００６２】
図４は、上記実施形態とは異なる動力伝達部材１０５′を用いたゼンマイ機構１００′を示す概略斜視図である。その他の構造については、上記ゼンマイ機構１００と同様であるので、それらの説明は省略する。この場合、動力伝達部材１０５′は、金属製のワイヤなどからなる可撓性の条材で構成されている。この動力伝達部材１０５′は、上記の帯材からなる動力伝達部材１０５とは異なり、ゼンマイ収容部１０３の外周に螺旋状に多数回巻回させることができるため、機構全体の外径を大きくすることなく、外部伝達部材の全長を長くすることができるという利点を持つ。なお、本明細書における「条材」とは、外観上、線状に構成されたものを言い、ワイヤ、紐、糸、ロープなどを含むが、帯材を含まない概念として用いる。
【００６３】
図５は、上記実施形態におけるゼンマイ収容部１０３と動力伝達部材１０５との取付構造を示す外面図、図６は同取付構造を示す横断面図である。ゼンマイ収容部１０３の外周壁には、取付孔１０３ｃが形成されている。この取付孔１０３ｃは、外周壁の周回方向に延長された形状を有する。この取付孔１０３ｃには、動力伝達部材１０５の先端に設けられた係合頭部１０５ｃが係合している。この係合頭部１０５ｃは、取付孔１０３ｃの幅（図示上下方向の長さ）よりも広い幅を有する。ただし、係合頭部１０５ｃの幅は、取付孔１０３ｃの長さ（図示左右方向の長さ）よりも小さく構成されている。係合頭部１０５ｃは細幅の係合首部１０５ｄにつながり、この係合首部１０５ｄが取付孔１０３ｃから外部へ導出されている。係合首部１０５ｄは、滑らかに幅が増大する増幅部１０５ｅを介して動力伝達部材１０５の通常の幅を有する部分に接続される。
【００６４】
この実施形態では、動力伝達部材１０５をゼンマイ収容部１０３に取り付ける場合には、まず、動力伝達部材１０５を図示の姿勢に対して図の紙面上において９０度回転させた姿勢とし、この姿勢で係合頭部１０５ｃを取付孔１０３ｃを通してゼンマイ収容部１０３の内部に導入する。そして、そのまま図の紙面上において動力伝達部材１０５を９０度回転させて図示の姿勢とすることにより、係合頭部１０５ｃを取付孔１０３ｃに係合させることができる。また、上記とは逆に、動力伝達部材１０５をゼンマイ収容部１０３から取り外す場合には、動力伝達部材１０５の姿勢を９０度回転させてから、係合頭部１０５ｃを取付孔１０３ｃから取り出せばよい。
【００６５】
なお、上記係合首部１０５ｄと、通常の幅を有する動力伝達部材１０５の部分との境界は図示二点鎖線に示すように段差状に構成されていてもよいが、本実施形態では、係合首部１０５ｄから徐々に幅が増大するように増幅部１０５ｅが設けられていることによって、係合首部１０５ｄの強度を高めてある。
【００６６】
上記実施形態では、帯材である動力伝達部材１０５のゼンマイ収容部１０３に対する取付構造を示した。一方、図４に示す動力伝達部材１０５′のような条材（たとえばワイヤ）が動力伝達部材として用いられる場合には、当該条材の先端をゼンマイ収容部１０３に設けた開口部から内部に導入し、この内部に導入された先端に、開口部に係合し得る（好ましくは開口部を通過できない大きさの）拡大された頭部を形成してなる取付構造を採用することができる。拡大した頭部を形成する方法としては、条材の先端を潰して拡大させる、当該先端を結んで瘤を作る、当該先端に他の部材を溶着するなどが挙げられる。
【００６７】
図７には、上記実施形態において、動力伝達部材１０５に付着した異物を除去する異物除去手段１１１を設けた様子を示す斜視図である。この異物除去手段１１１は、支持部材１０６の開口部１０６ａの開口縁に取り付けられた板状材で構成される。異物除去手段１１１の先端は動力伝達部材１０５の表面に密着した状態で摺接可能に構成されている。また、図示一点鎖線で示すように、動力伝達部材１０５の裏面にも、同様の異物除去手段１１２を設けてもよい。この異物除去手段１１２は、上記開口部１０６ａの引き出し方向反対側の開口縁に取り付けられた板状材である。異物除去手段１１１，１１２の素材としては、金属、合成樹脂、ゴムなどを用いることができる。
【００６８】
図８は、本実施形態の上記固定手段１０７と、動力伝達部材１０５の引き出し方向との関係を示す説明図である。上述のように、固定手段１０７は、中心部材１０２に螺合して、支持部材１０６を中心部材１０２に対して締め付け固定するように構成されている。ここで、固定手段１０７は、図８（ａ）及び（ｂ）に示すように、そのねじ込み方向が所定方向に設定されていることが好ましい。すなわち、図８（ａ）に示すように、中心部材１０２がゼンマイから受ける回転力の方向が反時計回りＬであり、動力伝達部材１０５の引き出し時のゼンマイ収容部１０３の回転方向も反時計回りＬである場合には、固定手段１０７のねじ込み方向を上記とは逆の時計回りＲとする。すなわち、この場合には、固定手段１０７は右ネジ（正ネジ）である。これとは逆に、図８（ｂ）に示すように、中心部材１０２がゼンマイから受ける回転力の方向が時計回りＲであり、動力伝達部材１０５の引き出し時のゼンマイ収容部１０３の回転方向も時計回りＲである場合には、固定手段１０７のねじ込み方向を逆の反時計回りＬとする。すなわち、この場合には固定手段１０７は左ネジ（逆ネジ）である。
【００６９】
上記のように構成すると、ゼンマイ１０１から受ける回転力により、或いは、動力伝達部材１０５の引き出しによって間接的に受ける回転力の増大により、中心部材１０２と固定手段１０７との螺合がより締まる方向に力を受けることになるので、上記の回転力によって螺合状態が緩むことがないことから、ゼンマイ機構の初期力（プリテンション）を確実に保持することができる。
【００７０】
図９は、ワンウェイクラッチ機構１１３の構造を示す断面図である。このワンウェイクラッチ機構１１３は、中心軸１１３ａと、この中心軸１１３ａに固定された保持部材１１３ｂと、保持部材１１３ｂによって保持された遊星歯車１１３ｃと、遊星歯車１１３ｃに噛合する内歯車１１３ｄと、この内歯車１１３ｄが設けられた外輪部材１１３ｅとを有する。ここで、保持部材１１３ｂは、遊星歯車１１３ｃを収容する円弧状の凹部を備えており、この凹部の形状は、図示時計回りに中心軸１１３ａを回転させると、遊星歯車を回転可能に図示時計回りに導くが、図示反時計回りに中心軸１１３ａを回転させようとすれば、凹部の開口縁が遊星歯車１１３ｃの歯に係合し、遊星歯車１１３ｃの回転を規制するように構成されている。
【００７１】
このワンウェイクラッチ機構１１３は、上記固定手段１０７の代わりに、中心部材１０２と支持部材１０６との間に取り付けることができる。たとえば、中心軸１１３ａを中心部材１０２に固定し、外輪部材１１３ｅを支持部材１０６に固定する。このようにしてワンウェイクラッチ機構１１３を取り付けることによって、中心部材１０２は支持部材１０６に対して図示時計回りにのみ回転可能となるため、動力伝達部材１０５を支持部材１０６に対して固定したとき、中心部材１０２を上記回転係合構造１０２ｃによって図示時計回りに回転させることによってゼンマイ１０１を巻き締めることが可能になる。一方、中心部材１０２は支持部材１０６に対して図示反時計回りには回転しないので、一旦設定された初期力（プリテンション）は特別の固定操作を行うことなく保持される。
【００７２】
図１０は、ゼンマイ機構１００の初期力（プリテンション）を設定するための製造装置を示す平面図であり、図１１は、当該製造装置の部分構造を示す部分斜視図（ａ）及び（ｂ）である。この製造装置５０は、機台５１と、この機台５１上に設けられた調整部５２に設けられた固定台５３と、固定台５３の傍らに設置された直線案内手段５４と、外部取付部材１０８に係合するための取付ヘッド５５と、この取付ヘッド５５に接続された取付軸５５ａを介して接続されたギアボックス５６と、このギアボックス５６に接続されたロードセル５７と、機台５１の下方に配置された伝達輪列５８と、伝達輪列５８に接続された回転操作ハンドル５９とを備えている。
【００７３】
固定台５３は、ゼンマイ装置１００の支持部材１０６を固定可能に構成される。たとえば、固定台５３は支持部材１０６の突起部１０６ｂに係合する係合固定構造を有している。この状態で、ゼンマイ装置１００の中心部材１０２の下端に設けられた回転係合構造１０２ｃは、図１１（ｂ）に示す回転駆動ピン５８ａに係合し、中心部材１０２と伝達輪列５８とが回転方向に連結される。一方、動力伝達部材１０５の端部に取り付けられた外部取付部材１０８は取付ヘッド５５に係合される。この取付ヘッド５５は、上記直線案内手段５４に固定されていて、案内レール５４ａに沿って直線的に高精度に案内されている。動力伝達部材１０５を支持部材１０６から所定長さだけ繰り出させ、外部取付部材１０８を取付ヘッド５５に連結すると、ロードセル５７は、取付軸５５ａ及びギアボックス５６を介して動力伝達部材１０５の引き込み力（引張力）を測定することができる。そして、その引張力の検出値は逐次、図示しない適宜の表示手段によって表示される。
【００７４】
上記の状態で、回転操作ダイヤル５９を回転させると、伝達輪列５８を介して中心部材１０２が回転させられるので、当該回転によって上記引張力の表示値は変化していく。このようにして回転操作ダイヤル５９を回転させていき、引張力の表示値が既定の値になると、回転操作ダイヤル５９を停止させ、回転操作ダイヤル５９を固定する。回転操作ダイヤル５９の固定構造としては、機台５１に固定された基盤５９ｘに円周上に多数配列された係合穴５９ｙを形成しておき、この基盤５９ｘ上において上記回転操作ダイヤル５９を回転可能に構成し、さらに、回転操作ダイヤル５９には１又は複数の貫通孔５９ａを形成しておく。このようにすると、貫通孔５９ａに固定ピン５９ｂを挿入し、固定ピン５９ｂの先端を基盤５９ｘの係合穴５９ｙに挿入すれば回転操作ダイヤル５９を回転方向に固定することができる。ここで、係合穴５９ｙの形成間隔（形成周期）と、回転操作ダイヤル５９に設けた複数の貫通孔５９ａの形成間隔（形成周期）とが異なるように構成しておくことによって、回転操作ダイヤル５９の固定可能な角度位置を細かく設定することが可能になる。たとえば、一方の形成周期を２０度、他方の形成周期を１５度とすれば、５度間隔で回転操作ダイヤル５９を固定できる。
【００７５】
上記のようにして回転操作ダイヤル５９を固定することによって、中心部材１０２の回転姿勢が固定される。そして、この状態で、固定手段１０７を中心部材１０２の雌ネジ部１０２ｂに螺合させ、支持部材１０６を締め付けて、中心部材１０２と支持部材１０６とを相互に固定する。固定手段１０７による固定作業時においては、中心部材１０２に対して外部回転トルクが加わるが、中心部材１０２は、固定された回転操作ダイヤル５９に連結された回転駆動ピン５８ａが回転係合構造１０２ｃに係合しているために固定されているため、回転することなく正確に固定手段１０７によって固定される。これによって、動力伝達部材１０５が所定の引き出し量であるときの引き込み力を正確に設定することができる。したがって、上記の装置及び方法によってゼンマイ機構１００の初期力を容易かつ正確に設定することができる。
【００７６】
なお、ゼンマイ機構１００におけるゼンマイ１０１の初期力を設定する方法は、上記方法に限定されるものではない。一般に、初期力の設定方法としては、▲１▼ゼンマイの外端に接続されたゼンマイ収容部１０３を回転させる方法と、▲２▼ゼンマイの内端に接続された中心部材１０２を回転させる方法とが考えられる。▲１▼の方法は、ゼンマイ収容部１０３に連動した動力伝達部材１０５及び外部取付部材１０８との間の位置関係の制約を受ける。▲２▼の方法は、上記のような制約はないが、中心部材を回転させる構造及びその固定構造が必要となり、また、中心部材の回転量を正確に制御する方法が必要となる。
【００７７】
上記▲１▼のように制約を受けず、しかも上記▲２▼のような構造を不要にする方法としては、中心部材１０２を支持部材１０６に固定するなどの適宜の方法で中心部材１０２を固定しておき、動力伝達部材１０５を引き出しながら、或いは、引き込みながら、動力伝達部材１０５の引き込み力（引張力）を測定する方法がある。たとえば、図１０に示す装置５０を用いる場合には、上記取付ヘッド５５に動力伝達部材１０５（或いは外部取付部材１０８）を取り付け、取付軸５５ａを直線案内手段５４の案内の下に牽引し若しくは引き戻すことによって動力伝達部材１０５の引き出し量を変化させながら、動力伝達部材１０５の引き込み力（引張力）を測定し、その測定値が既定値になったときに、動力伝達部材１０５を既定の長さになるように切断すればよい。その後、当該切断によって形成された動力伝達部材１０５の新たな端部に外部取付部材１０８を接続する。ただし、この方法では、初期力の設定時において動力伝達部材１０５の一部を切断する必要があるので、当初、動力伝達部材１０５をある程度余分に長いものとしておく必要がある。
【００７８】
図１２には、上記実施形態のゼンマイ１０１の内端及び外端の取り付け構造を示す。ゼンマイ１０１は、その内端に開口部を備えた係合端１０１ａを備え、この係合端１０１ａが中心部材１０２の係合部１０２ａに係合している。この中心部材１０２の形状は、図１６に詳細に示されている。中心部材１０２の係合部１０２ａは、ゼンマイ１０１の係合端１０１ａに引っ掛かるような形状を有し、この係合部１０２ａに向けて、中心部材１０２の上端から徐々に拡径するように傾斜したテーパ面１０２ｘが形成されている。このテーパ面１０２ｘは、係合部１０２ａをゼンマイ１０１の内端の開口部１０１ａに係合させる際にゼンマイ１０１の中心に向けて下方から中心部材１０２を挿入する案内になるように構成されたものである。中心部材１０２の上端をゼンマイ１０１の中心に挿入していくと、ゼンマイ１０１の内端はテーパ面１０２ｘによって徐々に周囲に押し広げられ、やがて、その内端の開口部１０１ａが中心部材１０２の係合部１０２ａに嵌合する。
【００７９】
一方、ゼンマイ１０１の外端には、Λ状の係合端１０１ｂが設けられている。この係合端１０１ｂは、ゼンマイ収容部１０３の内側に突出した係合突部１０３ｘに係合している。係合突部１０３ｘは、ゼンマイ収容部１０３の外周壁の一部を切断して内側に突出させるようにして構成される。
【００８０】
上記のように、ゼンマイ１０１の係合端１０１ｂがゼンマイ収容部１０３の内側に突出した係合突部１０３ｘに係合している場合、ゼンマイ１０１の係合端１０１ｂは係合突部１０３ｘの内側への突出分だけ中心側に配置されているため、当該係合端１０１ｂから見て、ゼンマイ１０１の渦巻き方向両側（図示例では時計回り及び反時計回りの両回転方向側）において、ゼンマイ１０１とゼンマイ収容部１０３の内周面との間に隙間ができる。これは、ゼンマイ１０１が巻き解かれた状態であっても同様である。このため、当該隙間のある部分において、動力伝達部材１０５の係合頭部１０５ｃを取付孔１０３ｃに係合させて取り付けるように構成しておけば、実際にゼンマイ機構を組み立てる際に、ゼンマイ１０１が巻き解かれた状態であっても（通常、ゼンマイ機構を組み立てる場合には、ゼンマイ１０１を巻き締めた状態に保持することができないので、ゼンマイ１０１は巻き解かれた状態にある。）、動力伝達部材１０５の係合頭部１０５ｃを支障なく取付孔１０３ｃに挿入し、係合させることができることになる。
【００８１】
このことは、上記のように係合頭部１０５ｃを取付孔１０３ｃの内部に挿入して係合させるような取付方法を用いる場合に特に有効であるが、このような方法ではなくても、好ましい場合がある。たとえば、動力伝達部材１０５の端部をゼンマイ収容部１０３に溶接する場合、その溶接部位の内面にゼンマイ１０１が接触していなければ、溶接熱によってゼンマイ１０１が損傷を受けるといったことも防止できる。
【００８２】
上記の動力伝達部材１０５のゼンマイ収容部１０３に対する取付部分は、係合突部１０３ｘから上記渦巻き方向側にθ＝４５度の角度範囲内に設定することが好ましく、特にθ＝３０度の角度範囲内に設定されることがさらに望ましい。
【００８３】
図１７には、上記係合突部１０３ｘを形成する方法を示す。本実施形態では、最初に、図１７（ａ）に示すように、ゼンマイ収容部１０３の外周面に三角状の凹部１０３ｆを切削加工などによって形成する。次に、図１７（ｂ）に示すように、上記凹部１０３ｆの内部を切断し、内側に押し込む（たとえばプレスの押し切りを行う）ことによって、ゼンマイ収容部１０３の内部に突出した係合突部１０３ｘが形成される。このとき、係合突部１０３ｘの先端には、先に形成した凹部１０３ｆの内面の一部が傾斜面１０３ｇとなって設けられる。この傾斜面１０３ｇは、図１７（ｃ）に示すように、ゼンマイ１０１の係合端１０１ｂとの係合を容易かつ確実にする。また、この製造方法では、係合突部１０３ｘの先端にカエリ（切断時に生ずるバリ）が発生しにくくなるため、ゼンマイ１０１の係合端１０１ｂの係合が当該カエリによって阻害されることがなくなるとともに、当該カエリによる係合端１０１ｂの損傷を防止できるという利点がある。
【００８４】
図１３には、ゼンマイ１０１とゼンマイ収容部１０３との接続構造について、上記とは異なる構成例を示す。なお、この図において、ゼンマイ１０１′の内端と中心部材１０２との接続構造は上記実施形態と同様であり、細部を省略して示してある。このゼンマイ１０１′の外端１０１ｂ′には、弾性を有する帯材で構成されたスリッピングアタッチメント１０１ｃ′が設けられている。このスリッピングアタッチメント１０１ｃ′は、その両端を重ね合わせるようにしてゼンマイ収容部１０３′の内周面１０３ｙ′に摺接している。この構成例では、ゼンマイ収容部１０３′の内周面１０３ｙ′は滑らかな円筒内面で構成されている。
【００８５】
上記構成例では、通常は、スリッピングアタッチメント１０１ｃ′の外面と、ゼンマイ収容部１０３′の内周面１０３ｙ′との摩擦によって、ゼンマイ１０１′の外端１０１ｂ′はゼンマイ収容部１０３′に接続されている。したがって、上記実施形態のような複雑な係合構造を設ける必要がなくなり、組み立て作業も容易に行うことができる。ここで、ゼンマイ１０１′が過剰に巻き締められると、ゼンマイ１０１′の弾性力はスリッピングアタッチメント１０１ｃ′とゼンマイ収容部１０３′の内周面１０３ｙ′との摩擦力に打ち勝つので、スリッピングアタッチメント１０１ｃ′はゼンマイ収容部１０３′の内部で摺動するので、ゼンマイ１０１′の過剰な巻き締めを防止することができる。
【００８６】
なお、図１３に示す構造において、ゼンマイ収容部１０３′と動力伝達部材１０５との取り付け方法として図１２に示す構造を採用しても構わないが、スリッピングアタッチメント１０１ｃ′に摺接するゼンマイ収容部１０３′の内周面１０３ｙ′を完全な円筒内面に構成し、スリッピングアタッチメント１０１ｃ′を円滑に摺動させようとすれば、動力伝達部材１０５の端部をゼンマイ収容部１０３′の外周面上において固定することが好ましい。
【００８７】
図１５は、上記実施形態の変形例を示す縦断面図である。この変形例においては、中心部材１０２が上部材１０２Ａと、下部材１０２Ｂとに分離され、これらの部材は相互に別部材として構成されている。そして、上部材１０２Ａと下部材１０２Ｂとは、単に回転方向にのみ係合するように着脱可能に嵌合されている。その他の構造は、上記実施形態と全く同様である。
【００８８】
この変形例では、ゼンマイ１０１、上部材１０２Ａ、及び、ゼンマイ収容部１０３の上ケース１０３Ａを組み立てて上ユニットとし、また、下部材１０２Ｂ、制動部１０４（ゼンマイ収容部１０３の下ケース１０３Ｂを含む。）を組み立てて下ユニットとする。そして、上記のように上ユニットと下ユニットとを別々に組み立てた後に、上部材１０２Ａと下部材１０２Ｂとを嵌合させ、回転方向に連結するとともに、ゼンマイ収容部１０３の上ケース１０３Ａと下ケース１０３Ｂとを嵌合させることにより、支持部材１０６の内部構造を完成させることができる。
【００８９】
このようにすると、上ユニットと下ユニットとに対して別々に事前に品質検査を行うことができるので、内部構造の完成前に不良ユニットを工程から排除することが可能になり、不良製品の発生率を低減することができ、歩留まりを向上させることができる。また、この構造では、ゼンマイ収容部１０３と制動部１０４のいずれか一方に問題があるときでも、上ユニットと下ユニットとを簡単に分離することができるので、簡単に修理を施すことができるという利点がある。
【００９０】
図１８は、上記実施形態のゼンマイ機構１００を用いた機器の具体例として引き出し装置１０を示す概略斜視図である。この引き出し装置１０は、外ケース体１１と、内ケース体１２とが出し入れ自在に構成されている。外ケース体１１の内側面には支持部材１０６が固定され、内ケース体１２の外側面には外部取付部材１０８が係合保持されている。より具体的には、内ケース体１２の外側面には凹溝１２ａが形成され、この凹溝１２ａの内部に係合ピン１２ｂが固定されていて、この係合ピン１２ｂに外部取付部材１０８の上記係合フックが係合している。ここで、ゼンマイ機構１００は凹溝１２ａの内部に配置されるようになっている。
【００９１】
この引き出し装置１０においては、外ケース体１１から内ケース体１２を引き出すと、動力伝達部材１０５が繰り出されて図示しないゼンマイが巻き締められる。内ケース体１２をある程度引き出すと、内ケース体１２の外側面において突出する方向にばね等で付勢された保持部材１２ｃが外ケース体１１の内側面に設けられた凹部１１ｃに嵌合することにより、内ケース体１２の引き出し状態がそのまま保持される。
【００９２】
一方、内ケース体１２を外ケース体１１内に格納させようとする場合には、内ケース体１２を軽く押し込むか、或いは、軽く引き出すようにすると、保持部材１２ｃは凹部１１ｃから一旦外れて押し込まれた状態になるので、その保持状態は解除される。すると、内ケース体１２は、ゼンマイ機構１００におけるゼンマイの駆動力と制動部の制動力とのバランスに応じた速度で動力伝達部材１０５に引き込まれ、外ケース体１１内にゆっくりと引き込まれていく。なお、この引き出し装置１０における被動体は、上記内ケース体１２である。
【００９３】
上記の引き出し装置１０などの各種機器において、本実施形態のゼンマイ機構１００は、種々の態様で用いることができる。たとえば、上記引き出し装置１０では、内ケース体１２を引き込む際にゼンマイ機構１００の駆動力を用いているが、これとは逆に、内ケース体１２を引き出す際にゼンマイ機構１００の駆動力を用いるように構成することもできる。たとえば、上記と同様に外ケース体１１に支持部材１０６を固定し、動力伝達部材１０５を前方に延長させて、外ケース体１１の内側前端部に固定したピン或いは定滑車を経由した後に、反転させて後方に向かって延長させ、その先端の外部取付部材１０８が内ケース体１２の後端部に係合するように構成する。また、内ケース体１２を外ケース体１２に押し込んだときに、内ケース体１２が外ケース体１１に係合保持されるように構成する。たとえば、図１８とは前後逆に構成し、上記の凹部１１ｃを外ケース体１１の内側後端に設け、上記の保持部材１２ｃを内ケース体１２の前端部に設ける。このようにすれば、内ケース体１２を外ケース体１１の中に押し込むと、動力伝達部材１０５はピン又は定滑車を介して繰り出され、やがて内ケース体１２は外ケース体１１に係合保持される。この状態で、内ケース体１２を軽く押し込むと、内ケース体１２の係合は解除され、ゼンマイ機構の駆動力によって動力伝達部材１０５は引き込まれ、これに従って内ケース体１２は外ケース体１１からゆっくりと引き出される。
【００９４】
上記のように各種機器にゼンマイ機構１００を用いる場合に、各種機器に対応したゼンマイ機構１００の動作ストロークＳと、動力伝達部材１０５の巻回状態との関係を図１４に示す。図１４（ａ）に示す構成では、機器の被動体の動作ストロークに対応した動力伝達部材１０５の引き出しストロークＳの範囲内において、動力伝達部材１０５が大きく繰り出されているとき（上図の場合）に、動力伝達部材１０５のゼンマイ収容部１０３に対する巻回数は１未満であり、動力伝達部材１０５のゼンマイ収容部１０３に対する取付端部１０５ｘは、動力伝達部材１０５の上層部分に覆われていない。これに対して、引き出しストロークＳの範囲内において、動力伝達部材１０５が引き込まれているとき（下図の場合）には、動力伝達部材１０５のゼンマイ収容部１０３に対する巻回数が１以上となり、上記の取付端部１０５ｘは動力伝達部材１０５の上層部分によって覆われた状態になる。このような構成によって、動力伝達部材１０５が繰り出されたり、引き込まれたりすることを繰り返すと、上記の取付端部１０５ｘは常に動力伝達部材１０５の上層部分に覆われたり、覆われなくなったりを繰り返すことになる。したがって、常時、取付端部１０５ｘに衝撃が加わることになるため、動力伝達部材１０５の取付端部１０５ｘや、当該取付端部１０５ｘに当接する上層部分が損傷して、極端な場合には動力伝達部材１０５の破断につながり、その結果、ゼンマイ機構１００の耐久性が大幅に低下する。
【００９５】
これに対して、本実施形態の機器においては、図１４（ｂ）に示すように、当該機器における引き出しストロークＳの範囲内において、最も動力伝達部材１０５が繰り出された状態でも、動力伝達部材１０５のゼンマイ収容部１０３に対する巻回数は１以上であり、上記取付端部１０５ｘは上層部分に覆われた状態にある。したがって、取付端部は動力伝達部材１０５の引き出し量に拘わらず、常に最低１層の上層部分に覆われていることになるため、当該当接部分１０５ｘや、これに当接する上層部分の損傷を低減することができ、その結果、ゼンマイ機構１００の耐久性を向上させることができる。
【図面の簡単な説明】
【図１】本発明のゼンマイ機構の斜視図。
【図２】ゼンマイ機構の縦断面図。
【図３】動力伝達部材と外部取付部材との取付構造を示す横断面図（ａ）、側面図（ｂ）、外面図（ｃ）、別の構成例の平面図（ｄ）及び横断面図（ｅ）。
【図４】ゼンマイ機構の別の構成例を示す斜視図。
【図５】動力伝達部材のゼンマイ収容部への取付構造を示す部分側面図。
【図６】動力伝達部材のゼンマイ収容部への取付構造を示す部分横断面図。
【図７】同ゼンマイ機構の別の構成例を示す斜視図。
【図８】ゼンマイ機構の構成と固定手段のねじ込み方向との関係を示す説明図（ａ）及び（ｂ）。
【図９】固定手段としてのワンウェイクラッチ機構を示す横断面図。
【図１０】ゼンマイ機構の初期力設定のための製造装置を示す平面図。
【図１１】上記製造装置の一部を示す部分分解斜視図（ａ）及び（ｂ）。
【図１２】ゼンマイ機構におけるゼンマイの接続構造を示す横断面図。
【図１３】ゼンマイの接続構造の別の構成例を示す横断面図。
【図１４】動作ストロークと動力伝達部材の巻回状態との関係を示す説明図（ａ）及び（ｂ）
【図１５】ゼンマイ機構の他の構成例を示す横断面図。
【図１６】中心部材の平面図（ａ）及び側面図（ｂ）
【図１７】ゼンマイ収容部の係合突部の製造方法を示す工程図（ａ）〜（ｃ）。
【図１８】ゼンマイ機構を用いた機器の構成例を示す概略斜視図。
【符号の説明】
１０…機器（引き出し装置）、１１…外ケース体、１２…内ケース体、１００…ゼンマイ機構、１０１…ゼンマイ、１０２…中心部材、１０３…ゼンマイ収容部、１０４…制動部、１０５…動力伝達部材、１０６…支持部材、１０７…固定手段、１０８…外部取付部材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mainspring mechanism and a device provided with the same, and more particularly to a structure of a mainspring mechanism suitable as a driving means for driving various driven objects by a mainspring while having a damper effect.
[0002]
[Prior art]
Generally, there are various mainspring mechanisms that drive various driven bodies at a controlled speed by using a winding force of a mainspring and a damper effect of a braking unit. For example, there are an open / close tray for a vehicle and a lid of an electric rice cooker. Is used as a drive mechanism for giving a sense of quality to the operation of a driven body.
[0003]
The above-mentioned conventional mainspring mechanism is configured such that the inner end of the mainspring is connected to the center member, the outer end of the mainspring is connected to the mainspring housing, and one of the center member and the mainspring housing is used as an output section. In addition, there is a known configuration in which a braking unit is connected to a center member to drive a driven body in a state where the rotation output is braked by the braking unit (see Patent Documents 1 and 2 below). ). In these spring mechanisms, the mainspring and the braking unit are compactly integrated.
[0004]
[Patent Document 1]
JP 2002-195148 A
[Patent Document 2]
JP 2002-202047 A
[0005]
[Problems to be solved by the invention]
However, in the above-mentioned conventional spring mechanism, since the output unit for driving the driven body is provided at the upper and lower positions in the axial direction with respect to the mainspring, the connection posture and the connection structure between the output unit and the driven body are limited. In addition, there is a problem in that it is difficult to reduce the size of the connection portion to the driven body, so that it is difficult to further reduce the size of the entire spring mechanism.
[0006]
In particular, due to the recent progress in miniaturization and diversification of various devices, the accommodation space inside the device when the mainspring mechanism is mounted tends to be more and more limited, and the mounting posture with respect to the driven body has also become diversified. Therefore, it is very difficult for a single model to support many devices.
[0007]
Therefore, the present invention has been made to solve the above-mentioned problem, and the problem is to increase the degree of freedom of a connection mode with a driven body in a mainspring mechanism having a mainspring and a braking unit, and to reduce the size of the mechanism. Another object of the present invention is to reduce the size of the connection portion with the driven body.
[0008]
[Means for Solving the Problems]
In order to solve the above problem, a mainspring mechanism of the present invention includes a mainspring, a center member connected to an inner end of the mainspring, and a center member connected to an outer end of the mainspring and rotated around an axis of the center member. A spring housing that is pivotally supported, a braking unit that applies a braking force between the center member and the spring housing, an end fixed to the spring housing, and wound around the outer periphery of the spring housing. A turned power transmission member having flexibility, and a support member that supports both ends of the center member, wherein the power transmission member rotates the mainspring housing with respect to the support member. It is characterized in that it can be pulled out.
[0009]
According to the present invention, since the flexible power transmission member wound around the outer periphery of the mainspring receiving portion is provided, it can be used as an output portion. Since there is no need to provide an output section, the space efficiency is improved, the volume of the mainspring mechanism itself can be reduced, and the flexible power transmission member can be pulled out from the support member. In addition, since the connection portion with the driven body can be reduced in size, and the driven body can be directly driven, the entire driving mechanism can be downsized. Further, since the power transmission member can be wound up with a large diameter, the amplitude of stress transmitted to the power transmission member can be suppressed low, and the durability can be improved. Furthermore, since the stress received via the power transmission member is supported by the support members at both ends of the center member, stable operation is possible and durability is improved. In addition, by using the flexible power transmission member, a continuous and smooth operation can be given to the driven body without giving an engagement shock or the like. Furthermore, by using a flexible power transmission member, the driving direction and the like with respect to the driven body can be appropriately configured, so that the degree of freedom with respect to the installation posture and the connection structure with respect to the driven body can be increased, and versatility can be achieved. The spring mechanism can be excellent. In addition, since the power transmission member has a degree of structural freedom, the dimensional tolerance of each component can be increased, and the manufacturing cost can be reduced. In addition, the connection structure with the driven body is simplified, assembly and disassembly are easy, and maintenance is excellent.
[0010]
In the present invention, it is preferable that the mainspring accommodating portion is rotatably supported on the center member on both axial sides of the mainspring. Thus, the mainspring housing can be stably supported on the central member. Here, the braking unit has a braking member connected at least in a rotational direction with respect to the central member, and a braking fluid in contact with the braking member, and the mainspring accommodation unit accommodates the braking fluid of the braking unit. When the case also serves as a part of the case, it is possible to configure so that the bearing portion on the brake unit side between the center member and the mainspring housing is lubricated by the fluid. By doing so, durability can be improved without the possibility of running out of lubrication.
[0011]
In the present invention, it is preferable that an external attachment member for attaching to a driven body is fixed to an end of the power transmission member opposite to an end fixed to the mainspring accommodating portion. Since it is difficult to attach the flexible power transmission member to the driven body as it is, due to the material of the power transmission member and the configuration of the driven body, the external mounting member is fixed to the end of the power transmission member, Attachment to the driven body can be performed more easily.
[0012]
In the present invention, the external mounting member may include a mounting side surface for mounting the power transmission member, and an engaging hook provided on an opposite side to the mounting side surface and engaging with the external member. preferable. By attaching the power transmission member to the mounting side surface of the external mounting member and providing an engagement hook on the side opposite to the mounting side surface, the external mounting member can be mounted without affecting the mounting portion of the power transmission member on the mounting side surface. Can be connected to the driven body.
[0013]
In the present invention, it is preferable that the support member has a container shape for housing the mainspring housing portion and has an opening configured to allow the power transmission member to be taken in and out. By configuring the support member in a container shape for accommodating the mainspring accommodating portion, the power transmitting member wound around the mainspring accommodating portion and the outer periphery thereof can be accommodated inside, so that the power transmitting member is not affected by external influences. This makes it harder to receive, improves the stability of the pull-out / pull-in operation, and reduces the intrusion of foreign matter, so that the durability can be improved. In addition, since the rigidity of the support member can be increased by forming the container into a container shape, the accuracy of fixing the mainspring mechanism using the support member can be improved, and the resistance to external impacts and the like can be increased.
[0014]
In the present invention, the support member is formed in a substantially cylindrical shape substantially coaxial with the mainspring accommodating portion, and the opening is provided in a part of an outer circumferential surface of the substantially cylindrical shape in an axial direction, and It is preferable that the remaining portion of the surface in the axial direction is not open. Since the support member is formed in a substantially cylindrical shape that is substantially coaxial with the mainspring accommodating portion, the entire mainspring mechanism can be made compact. In addition, since the opening is provided in a part of the outer peripheral surface of the substantially cylindrical shape in the axial direction and the remaining part in the axial direction is not open, the strength of the support member can be further increased, so that the power transmission member Is less likely to be deformed even when an excessive force is applied, and stable operation can be achieved. Here, from the viewpoint of component production, it is desirable that the support member is formed by assembling at least two members divided on both sides in the axial direction of the opening. Further, it is more preferable that the opening has an opening shape cut by a plane parallel to the axis in terms of facilitating manufacturing processing.
[0015]
In the present invention, the power transmission member may be a strip. By using a strip (a member formed in a linear shape) such as a wire, a rope, a string, or a thread, the power transmission member has no directionality and can be easily handled with respect to the driven body. In addition, since it is possible to spirally wind the outer periphery of the mainspring accommodating portion, it is possible to increase the number of turns without increasing the outer diameter of the wound portion, so that the operation stroke of the driven body can be increased. it can.
[0016]
In the present invention, the power transmission member may be a band material. By using the band material, the strength of the power transmission member can be increased without securing the thickness, so that it is possible to cope with a large stress and to make the outer diameter of the mainspring receiving portion compact.
[0017]
In the present invention, an external mounting member for mounting to a driven body is fixed to an end of the power transmission member opposite to an end fixed to the mainspring receiving portion, and the opposite side of the power transmission member. The end of is disposed along a mounting side surface that is one side surface of the external mounting member and is provided with a fixing hole, and the mounting side surface is provided with a fixing projection inserted and fixed through the fixing hole. Is preferred. According to this, since the end portion of the power transmission member is arranged along the mounting side surface, the stress applied between the power transmission member and the external mounting member is less likely to concentrate on a part of the power transmission member. Strength and durability can be improved. In addition, since the end of the power transmission member is fixed by being inserted into the fixing protrusion provided on the mounting side surface of the external mounting member, the power transmission member is securely fixed along the mounting side surface. Can be. Examples of a method for fixing the fixing hole and the fixing projection include caulking, welding, welding, and adhesion. Further, the fixing protrusion may be formed separately from the external mounting member, and the fixing protrusion engaged with the fixing hole may be fixed to the external mounting member.
[0018]
In the present invention, it is preferable that a protrusion protruding from the power transmission member is provided on the mounting side surface. The protrusion makes it difficult for the power transmission member on the mounting side surface to come into contact with other external members, so that the fixed portion between the power transmission member and the external mounting member can be protected. Here, it is more preferable that the projections are provided on both sides of the fixed portion between the power transmission member and the external mounting member, in order to enhance the protection effect. Further, it is desirable that the projection has a smooth curved surface in order to reduce the possibility of catching with other external members.
[0019]
In the present invention, it is preferable that an end protruding from the mounting side surface is provided on an end portion of the mounting side surface near the spring receiving portion. According to this, when the power transmission member is wound around the mainspring receiving portion, when the support member or another member tries to enter between the power transmission member and the external mounting member, the end projection is formed on the member. Since the collision can prevent a load from being applied to the fixed portion between the power transmission member and the mounting side surface, the fixed portion between the power transmission member and the external mounting member is also damaged or broken in a tear-like manner. Can be prevented.
[0020]
In the present invention, the mounting side surface is provided with an engagement projection at a position shifted from the fixed projection, and the power transmission member is provided with an engagement hole for engaging with the engagement projection, It is preferable that the engagement protrusion and the engagement hole are engaged with a margin on the mounting side surface in a direction orthogonal to a direction connecting the fixed protrusion and the engagement protrusion. According to this, since the fixing hole and the engaging hole of the power transmission member are inserted into the fixing protrusion and the engaging protrusion of the external mounting member, the stress in the rotation direction can be received at two places. Durability can be increased. Further, since the engaging hole and the engaging projection have a margin in a direction orthogonal to the direction connecting the fixing projection and the engaging projection, the mounting on the mounting side surface of the power transmission member within a range corresponding to the margin. The posture can be adjusted.
[0021]
In the present invention, a mounting hole for mounting the power transmission member is provided in the mainspring receiving portion, and an end of the power transmission member has a wide head disposed inside the mounting hole, And a narrow insertion portion inserted into the mounting hole, and the head is preferably engaged with the mounting hole. According to this, the power transmission member can be securely fixed to the mainspring accommodating portion with a simple structure without using a method such as welding or bonding. Further, the fixed portion between the power transmission member and the mainspring housing portion can be configured to be thin. Furthermore, the attachment and detachment of the power transmission member is facilitated, so that assembly and disassembly are facilitated. In addition, since a structure in which stress is less likely to be concentrated as compared with fixing by welding or the like can be achieved, mounting strength and durability can be improved. Here, of the opening edges of the mounting hole, it is desirable that the edge of the power transmission member on the drawing side be a tapered surface (inclined surface) in order to further prevent refraction and stress concentration of the power transmission member. Here, it is desirable that the mounting hole is formed in an extended shape having a length larger than the width of the head. Thus, by rotating the posture of the power transmission member by 90 degrees, the head can be easily inserted into and removed from the mounting hole, so that the mounting operation and the removing operation can be easily performed.
[0022]
In the present invention, foreign matter removing means for removing foreign matter that comes into contact with the surface of the power transmission member and adheres to the surface of the power transmission member may be provided at an opening edge of the opening of the support member. preferable. Since the foreign matter removing means is provided, the foreign matter attached to the surface of the power transmission member is removed at the opening edge of the opening of the support member. Winding is prevented, and as a result, damage and wear of the power transmission member due to pinching of foreign matter can be prevented, so that durability can be improved. Here, when the power transmission member is a band, it is desirable to provide foreign matter removing means on both sides of the band.
[0023]
In the present invention, it is preferable that an end portion of the center member is provided with a rotation engagement structure that is exposed to the outside and can be engaged in a rotation direction around an axis. Since the rotation engagement structure is provided at the end of the center member, if a tool or the like is engaged with the rotation engagement structure, the center member can be rotated from the outside. Initial force (retraction force (rotation torque) of the mainspring in a state where the power transmission member is most retracted, or in a state where the power transmission member is most retracted within the operation stroke of the driven body, that is, pretension, and so on). Is set, it is possible to easily adjust the initial force by rotating the center member. It is also possible to prevent rotation of the center member by using a rotation engagement structure. Examples of the rotary engagement structure include a concave groove and a square hole.
[0024]
In the present invention, it is preferable that fixing means for fixing the center member to the support member is provided. According to this means, since the center member can be fixed to the supporting member by the fixing means, the center member is fixed to the supporting member by the fixing means after setting the initial force by rotating the center member. Thus, the setting of the initial force is maintained. Here, it is preferable that the fixing means is configured to fix the other end of the central member opposite to the one end provided with the rotation engagement structure to the support member. Thus, the center member can be operated to rotate or the center member can be prevented from rotating by the rotation engagement structure at one end, and the center member is fixed to the support member by the fixing means at the other end. Since it is possible, the work of setting the initial force can be easily performed.
[0025]
In the present invention, it is preferable that the fixing means is a screw that is screwed into the center member to fasten and fix the support member. According to this, the center member and the support member can be easily fixed by screwing.
[0026]
In the present invention, at least one of the fixing means and the support member may be provided with a concave portion in contact with the other, and an adhesive for bonding the fixing means and the support member may be arranged in the concave portion. preferable. According to this, in addition to the fastening by the fixing means, the fixing means and the support member can be firmly fixed by the adhesive force of the adhesive arranged in the recess.
[0027]
In the present invention, it is preferable that at least one of the fixing means and the support member is provided with a concave-convex surface at a portion in contact with the other. According to this, in addition to the fastening by the fixing means, the effect of improving the frictional force by the uneven surface can be obtained, so that the fixing means and the support member can be firmly fixed. In addition, by setting the hardness of the fixing means and the hardness of the support member to be different from each other, it is possible to configure so that the uneven surface provided on one side is cut into the opposite surface. Thereby, both can be more firmly fixed.
[0028]
In the present invention, it is preferable that a tightening direction of the fixing means is opposite to a rotational direction of a rotational force applied to the central member by the mainspring. According to this, the fastening direction of the fixing means is opposite to the rotation direction of the rotational force received by the central member from the mainspring, so that the screwing state between the central member and the fixing means is changed by the rotational force received from the mainspring. In the tightening direction, for example, even if the power transmission member is extended, the screwing portion between the fixing means and the center member does not loosen due to the stress in the pull-out direction.
[0029]
In the present invention, between the center member and the support member, rotation of the center member is allowed in a direction of tightening the mainspring, and rotation of the center member is prohibited in a direction opposite to the winding direction. Preferably, a one-way clutch mechanism is provided. According to this, the initial force can be easily set by rotating the center member and winding the mainspring by the one-way clutch mechanism, and the initial force once set does not rotate in the reverse direction. It is held as is by the mechanism. Here, it is preferable that a rotation engagement structure is provided at an end of the center member, and the rotation engagement structure is exposed to the outside. As a result, the center member can be easily rotated, so that the initial force setting operation via the one-way clutch mechanism can be easily performed.
[0030]
In the present invention, the center member includes a first center member connected to an inner end of the mainspring, and a second center member connected to the braking unit, and the first center member and the second center are connected to each other. It is preferable that the members are coaxially engaged with each other in the rotation direction and detachable. According to this, after assembling the first central member, the mainspring, and the spring accommodating portion, and the second central member and the braking portion as separate units, after performing a quality inspection on each unit, the two units are mutually connected. Since it is possible to assemble, it is possible to detect a defective product at an early stage, and it is easy to disassemble even after the assembly is completed.
[0031]
In the present invention, the mainspring accommodating portion is provided with an engagement projection formed by cutting a part of an outer peripheral wall and projecting inward, and the outer end of the mainspring is engaged with the engagement projection. Is preferred. According to this, the outer end of the mainspring and the mainspring housing can be connected with a simple structure and with a simple operation.
[0032]
In the present invention, it is preferable that a mounting position of the power transmission member to the mainspring housing is provided near both sides of the mainspring in a spiral direction with respect to a mounting position of the mainspring to the mainspring housing. According to this, the power transmission member is attached near the both sides in the spiral direction of the mainspring, rather than the attachment position of the mainspring with respect to the mainspring housing. Therefore, even when the mainspring is unwound, the end of the mainspring is In the vicinity of both sides in the spiral direction of the position engaged with the engagement protrusion, there is a slight gap between the inner surface of the mainspring housing and the mainspring, so that the power transmission member can be easily moved with respect to the mainspring housing. (Ie, without disturbing the unwinding spring). In particular, when the end of the power transmission member is attached by being inserted into and engaged with a mounting hole provided in the mainspring receiving portion, the end of the power transmission member is obstructed by the mainspring and cannot be inserted into the mounting hole. Things can be avoided. Here, the vicinity of both sides in the spiral direction refers to a portion within an angle range of about 45 degrees or less with respect to the attachment position of the mainspring. In particular, it is desirable that the angle range be within about 30 degrees.
[0033]
In the present invention, the mainspring accommodating portion has a substantially cylindrical inner surface, and an outer end of the mainspring is slid on the inner surface, based on a frictional force generated between the mainspring and the inner surface due to the expanding force. It is preferable that the connection with the mainspring accommodating portion is ensured, and that the mainspring is configured to be slidable on the inner surface of the mainspring accommodating portion when an excessive rotational force is received. According to this, by forming the outer end (slipping attachment) of the mainspring as described above, it is not necessary to provide a normal engagement structure between the mainspring and the mainspring receiving portion, and it is possible to perform a part processing operation and Since the assembling work is also facilitated, the manufacturing cost can be reduced.
[0034]
In the present invention, the center member has an engagement projection that engages with an inner end of the mainspring, and a side surface on one of an upper side and a lower side in the axial direction of the engagement projection is the axis line. It is preferable that the inclined surface is directed obliquely upward or downward. According to this, when the center member is inserted inside the mainspring, the center portion of the mainspring can be guided to the engagement projection by the inclined surface, so that the assembling and connection work between the center member and the mainspring can be easily performed. Become. Further, since no excessive load is applied to the inner end of the mainspring, the quality of the mainspring mechanism can be improved.
[0035]
(Production method)
Next, the method of manufacturing the mainspring mechanism of the present invention includes a mainspring, a central member connected to an inner end of the mainspring, and a main member connected to an outer end of the mainspring and rotatable around an axis of the central member. A mainspring receiving portion pivotally supported by the mainspring, a braking portion for applying a braking force between the center member and the mainspring receiving portion, and an end fixed to the mainspring receiving portion and wound around an outer periphery of the mainspring receiving portion. A power transmission member, and a support member for supporting both ends of the center member, wherein the power transmission member is configured to be able to be pulled out of the support member. The pull-in force of the power transmission member was measured while changing the amount of pull-out of the transmission member, and when the predetermined pull-in force was obtained, the power transmission member was cut at a predetermined position, and thus obtained. The end of the serial power transmission member, characterized in that to connect the external mounting member for attachment to an external member.
[0036]
According to this manufacturing method, the necessary initial force can be set only by adjusting the amount of pulling out of the power transmission member (that is, without performing an operation such as rotating the center member with respect to the support member). it can. However, in this method, it is necessary that a sufficient length of the power transmission member is wound around the mainspring housing in advance because the power transmission member after cutting must have a length necessary for the pull-out operation. is there. In addition, this method is usually performed in a state where the center member is fixed to the support member or other members in the rotation direction.
[0037]
Further, another manufacturing method of the mainspring mechanism of the present invention includes a mainspring, a center member connected to an inner end of the mainspring, and a center member connected to an outer end of the mainspring and rotated around an axis of the center member. A spring housing that is pivotally supported, a braking unit that applies a braking force between the center member and the spring housing, an end fixed to the spring housing, and wound around the outer periphery of the spring housing. A method for manufacturing a mainspring mechanism, comprising: a turned power transmission member, and a support member that supports both ends of the center member, wherein the power transmission member is configured to be able to be pulled out with respect to the support member. A concave portion is formed on the outer surface of the mainspring receiving portion, and then, by cutting the inside of the concave portion and projecting to the inside of the mainspring receiving portion, an engaging projection for engaging the outer end of the mainspring is formed. Form It is characterized in.
[0038]
According to this manufacturing method, a concave portion is formed at the tip of the engaging projection by forming a concave portion on the outer surface of the mainspring housing portion in advance and cutting the inside of the concave portion so as to project inside the mainspring housing portion. Since there is a portion processed at the time, the tip shape of the engaging projection can be made into a shape that can easily engage with the outer end of the mainspring, and the tip of the engaging projection is It is also possible to prevent possible burrs (burrs generated at the time of breaking) from remaining. In particular, the outer end of the mainspring can be easily and reliably engaged by forming the recess in consideration of the shape in advance so that a slope is formed at the tip of the engaging projection.
[0039]
Next, still another method of manufacturing a mainspring mechanism according to the present invention includes a mainspring, a center member connected to an inner end of the mainspring, and a main member connected to an outer end of the mainspring, and around an axis of the center member. A mainspring receiving portion rotatably supported on the mainspring, a braking portion for applying a braking force between the center member and the mainspring receiving portion, and an end fixed to the mainspring receiving portion, and an outer periphery of the mainspring receiving portion A power transmission member wound around, a support member for supporting both ends of the center member, and fixing means for fixing the center member and the support member, and the power transmission member is fixed to the support member. A method of manufacturing a mainspring mechanism configured to be able to be pulled out, wherein the fixed state of the center member and the support member by the fixing means is released, and the amount of pulling out of the power transmission member is appropriately set. While rotating the member to measure the pulling force of the power transmitting member, when the drawing force becomes the default value, characterized in that for fixing the support member and the central member by the fixing means.
[0040]
According to this manufacturing method, the center member is rotated in a state where the power transmission member is set to the predetermined amount of withdrawal, and the center member is fixed when the retraction force that changes in accordance with the rotation reaches a predetermined value. Since the fine adjustment of the initial force is facilitated, the initial force of the mainspring mechanism can be set accurately and reliably.
[0041]
(manufacturing device)
Next, the manufacturing device of the mainspring mechanism of the present invention is connected to a mainspring, a center member connected to an inner end of the mainspring, and an outer end of the mainspring, and is rotatable around an axis of the center member. A mainspring receiving portion pivotally supported by the mainspring, a braking portion for applying a braking force between the center member and the mainspring receiving portion, and an end fixed to the mainspring receiving portion and wound around an outer periphery of the mainspring receiving portion. Power transmission member, a support member that supports both ends of the center member, and a fixing unit that fixes the center member and the support member, so that the power transmission member can be pulled out from the support member. An apparatus for manufacturing a mainspring mechanism, comprising: a fixed base for fixing the support member; and the central member connected to the central member in an installation state in which the support member is fixed to the fixed base. A rotation transmission mechanism for rotating the power transmission member in the installed state, and a stress detection unit for measuring a retraction force of the power transmission member while maintaining the power transmission member in a state having a predetermined amount of pull-out. And
[0042]
(machine)
Next, a device according to the present invention includes: the mainspring mechanism described above; and a driven body connected to the power transmission member or the external mounting member of the mainspring mechanism.
[0043]
According to the present invention, in a device, a driven body can be driven at a controlled speed by a mainspring and a braking unit. In addition, since the degree of freedom of the manner of attaching the mainspring mechanism and the driven body is high, the degree of freedom in design such as the operation direction of the driven body and the mounting posture of the mainspring mechanism is improved, and many variations can be configured. Further, since the mainspring mechanism and its mounting structure with the driven body can be miniaturized, the whole apparatus can be made compact.
[0044]
In the present invention, within a range of an operation stroke of the driven body, an attachment portion attached to the mainspring housing of the power transmission member is always covered by an upper layer portion of the wound power transmission member. Preferably, it is configured. According to the present invention, since the mounting portion of the power transmission member to the mainspring accommodating portion is always covered by the upper layer portion of the power transmission member within the range of the operation stroke of the driven body, As a result, the upper layer portion of the power transmission member does not directly contact or separate from the mounting portion, so that damage to the power transmission member and the mounting portion can be prevented, and durability can be improved. Can be improved.
[0045]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of a mainspring mechanism, a method of manufacturing the mainspring mechanism, and devices according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing the appearance of the mainspring mechanism 100 of the present embodiment, and FIG. 2 is a vertical sectional view of the mainspring mechanism 100.
[0046]
The mainspring mechanism 100 includes a mainspring 101, a center member 102 connected to the inner end of the mainspring 101, a mainspring receiving section 103 connected to the outer end of the mainspring 101, and a braking section 104 connected to the center member 102. , A flexible power transmission member 105 wound around the outer periphery of the mainspring housing 103, and a support member 106 for supporting both ends of the center member 102. In the present specification, the mainspring housing portion 103 includes the entire portion rotatably supported by the center member 102. Further, the center member 102 is screwed to a fixing means 107 including a fixing screw, and the fixing means 107 fastens and fixes the support member 106 to the center member 102.
[0047]
The center member 102 has an engaging portion 102a connected to the inner end of the mainspring 101. The center member 102 rotatably supports the mainspring accommodating portion 103 on both sides in the axial direction of the engaging portion 102a. Further, at one end (upper end in the figure) of the center member 102, there is provided a female screw portion 102b screwed to the fixing means 107. Further, a rotation engagement structure 102c formed of a square hole or the like is provided at the other end (the lower end in the figure) of the center member 102. The rotation engagement structure 102c is exposed to the outside without being covered by the support member 106.
[0048]
The fixing means 107 is screwed to the center member 102 to tighten the support member 106 and fix the support member 107 to the center member 102. At this time, a concave portion is provided on at least one of the contact surfaces of the support member 106 and the fixing means 107, and an adhesive is poured into the concave portion to adhere the support member 106 and the fixing means 107, so that the support member 106 and the fixing means 107 can be fixed more firmly. it can. Also, at least one of the contact surfaces between the support member 106 and the fixing means 107 is formed with irregularities (rough surfaces may be formed) in the rotational direction to increase friction between the two or to make the contact surfaces between the two contact each other. The fixing force can be further increased by biting each other. In particular, by making one hardness relatively high and the other hardness relatively low, the uneven surface formed on one side can easily penetrate the other contact surface. For example, one can be made of stainless steel and the other can be made of aluminum or aluminum alloy.
[0049]
The fixing means is not limited to the above-described one that is screwed to the center member 102 and fastened to the support member 106, but may be any one that can relatively fix the center member 102 and the support member 106. Just fine. For example, the center member 102 and the support member 106 are fixed by bonding, welding, caulking, or the like, or a driving member that is driven into one of the center member 102 and the support member 106 and engages with the other (for example, formed on the support member). And a pin having a polygonal head that fits into the square hole formed and is configured to be driven into the center member. Further, a combination of two or more of the fixing methods used for the plurality of fixing means may be used.
[0050]
As shown in FIG. 2, the mainspring housing 103 includes an upper case 103 </ b> A pivotally supported by the center member 102 on one axial side (upper side in the figure) and a central member 102 on the other side (lower side in the axial direction). And a lower case 103B pivotally supported by the lower case 103B. The lower case 103B forms a case body of the braking unit 104 together with the lower braking case 104A. The mainspring housing portion 103 is configured as a whole in a cylindrical shape in which both ends substantially coaxial with the central member 102 are closed.
[0051]
As described above, since the mainspring housing 103 includes the entire portion rotatably supported by the center member 102, the concept of the mainspring housing 103 also includes the lower braking case 104A. It is. Therefore, in the present embodiment, the power transmission member 105 is wound around the outer periphery of the upper case 103A. However, in the present invention, the power transmission member 105 may be wound around the outer periphery of the lower brake case 104A. Include.
[0052]
In the braking unit 104, a braking member 104B that is rotationally engaged with the center member 102 is disposed inside a case body constituted by the lower case 103B and the lower braking case 104, and the braking member 104B is , Is immersed in a braking fluid 104C such as oil disposed inside the case body. The braking force of the braking unit 104 is generated by viscous resistance generated when the braking member 104B tries to rotate in the braking fluid 104 inside the case body.
[0053]
The power transmission member 105 is formed of a flexible band, for example, a metal band such as stainless steel having flexibility. An annular concave groove is formed on the outer peripheral surface of the mainspring housing 103, and the power transmission member 105 is wound in the concave groove. An inner end (not shown) of the power transmission member 105 is fixed to the mainspring housing 103 in a manner described later. The outer end of the power transmission member 105 is fixed to an external mounting member 108 as shown in FIG. One side of the external mounting member 108 is a mounting side 108A to which the outer end of the power transmission member 105 is mounted, and an engagement hook 108B is provided on the opposite side to the mounting side 108A.
[0054]
The support member 106 is configured in a container shape that houses the mainspring housing 103. More specifically, the support member 106 has a cylindrical shape that is substantially coaxial with the center member 102 and that is closed at both ends. The support member 106 is formed by fitting an upper case 106A and a lower case 106B in the axial direction. The upper case 106A supports one end of the center member 102. An opening 106a cut in a plane parallel to the axis is provided in a part of the upper case 106A. In the illustrated example, the opening 106a is provided only in a part (upper part) in the axial direction of the upper case 106A, and the remaining part (the lower end in the figure) of the upper case 106A is not open. Thereby, the rigidity (strength) of the upper case 106A can be increased. However, an opening having a shape cut by a plane parallel to the axis may be provided over the entire axial direction of the upper case 106A.
[0055]
The lower case 106B is provided with one or a plurality of protrusions 106b for attaching and fixing to a device or the like. A central opening 106c is provided at the center of the lower case 106B, and the central case 106C is fitted into the central opening 106c. The center case 106C supports the other (lower illustrated) end of the center member 102.
[0056]
FIG. 3 is a cross-sectional view (a), a side view (b), and an external view (c) showing the structure of the external mounting member 108 in detail. The outer mounting member 108 has an L-shape as a whole. A through hole 108a is opened in the mounting side surface 108A of the external mounting member 108, and an engagement projection 108b is formed to project from an end of the opening on the side of the mainspring 103. On the other hand, at the end of the power transmission member 105, a fixing hole 105a is provided corresponding to the through hole 108a, and an engagement hole 105b corresponding to the engagement projection 108b is provided. The fixing hole 105a and the engagement hole 105b are arranged in the extension direction of the power transmission member 105. Here, in this configuration example, the fixing pin 109 is fixed to the fixing hole 105a and the through hole 108a in a state where the fixing hole 105a is arranged on the opening of the through hole 108a, and the engaging hole 105b is fitted to the engaging protrusion 108b. 108a, and is fixed to the external mounting member 108. That is, the power transmission member 105 is in a state where the power transmission member 105 is pressed by the enlarged head of the fixing pin 109, and the fixing pin 109 is fixed to the external mounting member 108 by means of caulking, welding, welding, or the like. Is fixed on the mounting side surface 108A.
[0057]
In this case, as shown in FIG. 3B, when the fixing pin 109 is inserted into the fixing hole 105a and the engaging protrusion 108b is fitted into the engaging hole 105b, the engaging hole 105b and the engaging protrusion 108b are fitted. A margin is provided in the direction perpendicular to the extension direction of the power transmission member 105 on the mounting side surface 108A (the vertical direction in FIG. 3B). For this reason, in the manufacturing stage, the mounting posture of the power transmission member 105 with respect to the external mounting member 108 can be adjusted within a certain range. In this manner, the mounting posture of the force transmitting member 105 is adjusted, and once the mounting posture of the power transmitting member 105 with respect to the external mounting member 108 is determined, the head of the fixing pin 109 is strongly pressed against the power transmitting member 105. By fixing the fixing pin 109 to the external mounting member 108 by the above method, the power transmission member 105 can be fixed to the external mounting member 108 in a predetermined posture. At this time, the head of the fixing pin 109 functions as a fixing protrusion provided on the mounting side surface 108A.
[0058]
Instead of completely fixing the power transmission member 105 to the external mounting member 108 as described above, the power transmission member 105 may be configured to be rotatably held on the mounting side surface 108A. In this case, since the external mounting member 108 is configured to be capable of changing its attitude with respect to the power transmission member 105, it is possible to absorb vibration during driving and to have an effect of preventing breakage due to stress. Will be possible. At this time, the range of the posture change is determined by the allowance between the engagement hole 105b and the engagement protrusion 108b (that is, the engagement allowance in the direction orthogonal to the direction connecting the fixed projection and the engagement protrusion). The margin is preferably set to about 10% of the opening diameter of the engagement hole 105b.
[0059]
The external mounting member 108 is provided with a protection projection 108c protruding on the mounting side surface 108A. The protection projection 108c has a smooth surface having a convex curved surface. The height of the protection projection 108c is configured to be higher than the end of the power transmission member 105 fixed on the mounting side surface 108A. When the external mounting member 108 comes into contact with another member, the protection projection 108c prevents the power transmission member 105 or the mounting portion on the mounting side surface 108A from coming into contact with the other member. . The protection projection 108c is provided on the tip side of the mounting side surface 108A, but may be provided on any portion of the mounting side surface 108A. Further, by forming the above-mentioned engagement projection 108b higher than the power transmission member 105, it can be used as a protection projection. In this case, since the protection projections are provided on both sides of the attachment portion of the power transmission member 105, respectively, it is more effective.
[0060]
Further, since the engagement protrusion 108b is provided at the base end of the mounting side surface 108A (that is, on the side of the mainspring receiving portion 103), the power transmission member 105 is retracted, and the external mounting member 108 is moved to the opening 106a of the support member 106. The engaging projection 108b functions as an end projection when the opening edge contacts the opening edge of the power transmission member 105 and the mounting side surface 108A. That is, when the opening edge of the support member 106 tries to enter between the power transmission member 105 and the mounting side surface 108A, the mounting portion of the power transmission member 105 to the external mounting member 108 is again deformed in a tearing manner, or in an extreme case. In this embodiment, the power transmission member 105 may be peeled off from the external mounting member 108. However, in the present embodiment, the engaging projection 108b is provided at the base end of the mounting side surface 108A, so that the opening edge of the supporting member 106 Is always in contact with the engagement projection 108b, so that occurrence of the above situation can be prevented. Here, in the present embodiment, the engagement protrusion 108b that engages with the power transmission member 105 also serves as an end protrusion having the above function, but an end protrusion may be provided separately from the engagement protrusion 108b. . For example, end projections may be projected from both sides of the power transmission member 105 in the width direction.
[0061]
FIG. 3D is a plan view of an external mounting member 108 'having a structure different from that of the external mounting member 108, and FIG. 3E is a cross-sectional view of the external mounting member 108'. This external mounting member 108 'is provided with the same engaging projections 108b' and protective projections 108c 'as described above on the mounting side surface 108A'. ′ Are provided integrally. The power transmission member 105 is plastically deformed (caulked) by applying pressure from above in the figure with the fixing projection 108a 'inserted through the fixing hole 105a of the power transmission member 105, thereby causing the power transmission member 105 to be plastically deformed. It is configured so that it can be fixed. The other structure is the same as that of the external mounting member 108, and the description thereof is omitted.
[0062]
FIG. 4 is a schematic perspective view showing a mainspring mechanism 100 'using a power transmission member 105' different from the above embodiment. The other structure is the same as that of the mainspring mechanism 100, and thus the description thereof is omitted. In this case, the power transmission member 105 'is formed of a flexible strip made of a metal wire or the like. Unlike the power transmission member 105 made of the above-mentioned band material, the power transmission member 105 ′ can be spirally wound many times around the outer periphery of the mainspring accommodating portion 103, thereby increasing the outer diameter of the entire mechanism. This has the advantage that the total length of the external transmission member can be increased without any need. In the present specification, the term “strip” refers to a material that is linear in appearance and includes a wire, a string, a thread, a rope, and the like, but is used as a concept that does not include a strip.
[0063]
FIG. 5 is an external view showing a mounting structure of the mainspring housing 103 and the power transmission member 105 in the above embodiment, and FIG. 6 is a cross-sectional view showing the mounting structure. A mounting hole 103c is formed in the outer peripheral wall of the mainspring housing 103. The mounting hole 103c has a shape extending in the circumferential direction of the outer peripheral wall. An engagement head 105c provided at the tip of the power transmission member 105 is engaged with the mounting hole 103c. The engaging head 105c has a width wider than the width (length in the vertical direction in the drawing) of the mounting hole 103c. However, the width of the engaging head 105c is configured to be smaller than the length of the mounting hole 103c (length in the left-right direction in the figure). The engaging head 105c is connected to a narrow engaging neck 105d, and the engaging neck 105d is led out of the mounting hole 103c. The engagement neck 105d is connected to a portion of the power transmission member 105 having a normal width via an amplifying portion 105e whose width increases smoothly.
[0064]
In this embodiment, when attaching the power transmission member 105 to the mainspring accommodating section 103, first, the power transmission member 105 is rotated by 90 degrees on the paper of the drawing with respect to the illustrated posture. The joint head 105c is introduced into the spring housing 103 through the mounting hole 103c. The engaging head 105c can be engaged with the mounting hole 103c by rotating the power transmitting member 105 by 90 degrees as it is on the paper of FIG. Conversely, when the power transmission member 105 is to be removed from the mainspring receiving portion 103, the posture of the power transmission member 105 is rotated by 90 degrees, and then the engaging head 105c may be taken out from the mounting hole 103c. .
[0065]
The boundary between the engagement neck 105d and the portion of the power transmission member 105 having a normal width may be formed in a stepped shape as shown by a two-dot chain line in the drawing. The strength of the engaging neck 105d is increased by providing the amplifying section 105e so that the width gradually increases from the neck 105d.
[0066]
In the above-described embodiment, the mounting structure of the power transmission member 105, which is a band, to the mainspring housing portion 103 has been described. On the other hand, when a strip (for example, a wire) such as the power transmission member 105 ′ shown in FIG. 4 is used as the power transmission member, the leading end of the strip is introduced into the inside from the opening provided in the mainspring housing 103. Then, it is possible to adopt a mounting structure in which an enlarged head (preferably of a size that cannot pass through the opening) is formed at the tip introduced into the inside thereof so as to be able to engage with the opening. As a method of forming an enlarged head, there are a method of crushing and enlarging the tip of a strip, forming an aneurysm by tying the tip, and welding another member to the tip.
[0067]
FIG. 7 is a perspective view showing a state in which a foreign matter removing unit 111 for removing foreign matter attached to the power transmission member 105 is provided in the above embodiment. The foreign substance removing means 111 is formed of a plate-like material attached to the opening edge of the opening 106a of the support member 106. The tip of the foreign matter removing means 111 is configured to be slidably contacted with the surface of the power transmission member 105 in close contact therewith. Further, as shown by a dashed line in the figure, a similar foreign matter removing means 112 may be provided on the back surface of the power transmission member 105. The foreign matter removing means 112 is a plate-like material attached to an opening edge of the opening 106a on the side opposite to the drawing direction. As a material of the foreign matter removing means 111 and 112, metal, synthetic resin, rubber, or the like can be used.
[0068]
FIG. 8 is an explanatory diagram showing the relationship between the fixing means 107 of the present embodiment and the direction in which the power transmission member 105 is pulled out. As described above, the fixing means 107 is configured to be screwed to the center member 102 to fasten and fix the support member 106 to the center member 102. Here, it is preferable that the screwing direction of the fixing means 107 is set to a predetermined direction, as shown in FIGS. 8A and 8B. That is, as shown in FIG. 8A, the direction of the rotational force that the central member 102 receives from the mainspring is counterclockwise L, and the rotational direction of the mainspring housing 103 when the power transmission member 105 is pulled out is also counterclockwise. In the case of L, the screwing direction of the fixing means 107 is set to the clockwise R opposite to the above. That is, in this case, the fixing means 107 is a right-hand screw (positive screw). Conversely, as shown in FIG. 8B, the direction of the rotational force received by the central member 102 from the mainspring is clockwise R, and the rotational direction of the mainspring housing 103 when the power transmission member 105 is pulled out is also changed. In the case of clockwise R, the screwing direction of the fixing means 107 is set to the opposite counterclockwise L. That is, in this case, the fixing means 107 is a left-handed screw (reverse screw).
[0069]
With the above configuration, the rotational force received from the mainspring 101 or an increase in the rotational force indirectly received by pulling out the power transmission member 105 increases the direction in which the screwing between the center member 102 and the fixing means 107 is further tightened. Since the force is received, the screwing state is not loosened by the above-mentioned rotational force, and thus the initial force (pretension) of the mainspring mechanism can be reliably held.
[0070]
FIG. 9 is a sectional view showing the structure of the one-way clutch mechanism 113. The one-way clutch mechanism 113 includes a center shaft 113a, a holding member 113b fixed to the center shaft 113a, a planetary gear 113c held by the holding member 113b, an internal gear 113d meshed with the planetary gear 113c, and An outer ring member 113e provided with a gear 113d. Here, the holding member 113b has an arc-shaped concave portion for accommodating the planetary gear 113c, and the shape of this concave portion is such that when the central shaft 113a is rotated clockwise in the figure, the planetary gear is rotatable clockwise in the figure. However, if the central shaft 113a is to be rotated counterclockwise in the figure, the opening edge of the concave portion is engaged with the teeth of the planetary gear 113c, and the rotation of the planetary gear 113c is restricted.
[0071]
The one-way clutch mechanism 113 can be attached between the center member 102 and the support member 106 instead of the fixing means 107. For example, the center shaft 113a is fixed to the center member 102, and the outer ring member 113e is fixed to the support member 106. By attaching the one-way clutch mechanism 113 in this manner, the center member 102 can rotate only clockwise in the drawing with respect to the support member 106. Therefore, when the power transmission member 105 is fixed to the support member 106, By rotating the member 102 clockwise by the rotation engagement structure 102c, the mainspring 101 can be tightened. On the other hand, since the center member 102 does not rotate counterclockwise with respect to the support member 106 in the figure, the initially set initial force (pretension) is held without performing a special fixing operation.
[0072]
FIG. 10 is a plan view showing a manufacturing apparatus for setting an initial force (pretension) of the mainspring mechanism 100, and FIG. 11 is a partial perspective view showing a partial structure of the manufacturing apparatus. It is. The manufacturing apparatus 50 includes a machine base 51, a fixed base 53 provided on an adjustment unit 52 provided on the machine base 51, a linear guide means 54 installed beside the fixed base 53, and an external mounting member. 108, a gear box 56 connected via a mounting shaft 55a connected to the mounting head 55, a load cell 57 connected to the gear box 56, The transmission includes a transmission wheel train 58 disposed below and a rotation operation handle 59 connected to the transmission wheel train 58.
[0073]
The fixing base 53 is configured to be able to fix the support member 106 of the mainspring device 100. For example, the fixing base 53 has an engagement fixing structure for engaging with the protrusion 106b of the support member 106. In this state, the rotation engagement structure 102c provided at the lower end of the center member 102 of the mainspring device 100 engages with the rotation drive pin 58a shown in FIG. Connected in the rotation direction. On the other hand, the external mounting member 108 mounted on the end of the power transmission member 105 is engaged with the mounting head 55. The mounting head 55 is fixed to the linear guide means 54, and is linearly guided with high precision along the guide rail 54a. When the power transmission member 105 is extended from the support member 106 by a predetermined length and the external mounting member 108 is connected to the mounting head 55, the load cell 57 receives the pulling force of the power transmission member 105 via the mounting shaft 55a and the gear box 56 ( Tensile force) can be measured. Then, the detected value of the tensile force is sequentially displayed by an appropriate display means (not shown).
[0074]
When the rotary operation dial 59 is rotated in the above state, the center member 102 is rotated via the transmission wheel train 58, and the rotation changes the display value of the tensile force. The rotation operation dial 59 is rotated in this manner, and when the display value of the pulling force reaches a predetermined value, the rotation operation dial 59 is stopped and the rotation operation dial 59 is fixed. As a structure for fixing the rotary operation dial 59, a large number of engagement holes 59y are formed on a base 59x fixed to the machine base 51, and the rotary operation dial 59 is rotated on the base 59x. The rotary operation dial 59 is formed with one or more through holes 59a. By doing so, the rotary operation dial 59 can be fixed in the rotational direction by inserting the fixing pin 59b into the through hole 59a and inserting the tip of the fixing pin 59b into the engaging hole 59y of the base 59x. Here, by forming the interval (forming period) of the engagement holes 59y different from the forming interval (forming period) of the plurality of through holes 59a provided in the rotary operation dial 59, the rotation operation dial is formed. It is possible to finely set the 59 fixable angular positions. For example, if one forming cycle is 20 degrees and the other forming cycle is 15 degrees, the rotary operation dial 59 can be fixed at intervals of 5 degrees.
[0075]
By fixing the rotation operation dial 59 as described above, the rotation posture of the center member 102 is fixed. Then, in this state, the fixing means 107 is screwed into the female screw portion 102b of the center member 102, and the support member 106 is tightened to fix the center member 102 and the support member 106 to each other. At the time of the fixing operation by the fixing means 107, an external rotation torque is applied to the center member 102, but the center member 102 has a rotation drive pin 58a connected to the fixed rotation operation dial 59 fixed to the rotation engagement structure 102c. Since it is engaged and fixed, it is accurately fixed by the fixing means 107 without rotating. As a result, it is possible to accurately set the retraction force when the power transmission member 105 has the predetermined amount of withdrawal. Therefore, the initial force of the mainspring mechanism 100 can be easily and accurately set by the above apparatus and method.
[0076]
The method of setting the initial force of the mainspring 101 in the mainspring mechanism 100 is not limited to the above method. In general, the initial force can be set by (1) a method of rotating the mainspring accommodating portion 103 connected to the outer end of the mainspring, and (2) a method of rotating the center member 102 connected to the inner end of the mainspring. Can be considered. The method (1) is restricted by the positional relationship between the power transmitting member 105 and the external mounting member 108 interlocked with the mainspring housing 103. The method (2) is not limited as described above, but requires a structure for rotating the central member and a fixing structure thereof, and also requires a method for accurately controlling the amount of rotation of the central member.
[0077]
As a method for eliminating the structure as described in (2) without being restricted as in (1) above, the center member 102 is fixed by an appropriate method such as fixing the center member 102 to the support member 106. In addition, there is a method of measuring the pull-in force (tensile force) of the power transmission member 105 while pulling out or pulling out the power transmission member 105. For example, when the apparatus 50 shown in FIG. 10 is used, the power transmission member 105 (or the external mounting member 108) is mounted on the mounting head 55, and the mounting shaft 55a is pulled or pulled back under the guidance of the linear guide means 54. Thus, the pull-in force (tensile force) of the power transmission member 105 is measured while changing the amount of pull-out of the power transmission member 105, and when the measured value reaches a predetermined value, the power transmission member 105 is extended to a predetermined length. What is necessary is just to cut so that it may become. Thereafter, the external mounting member 108 is connected to a new end of the power transmission member 105 formed by the cutting. However, in this method, it is necessary to cut off a part of the power transmission member 105 at the time of setting the initial force. Therefore, it is necessary to initially make the power transmission member 105 extra long to some extent.
[0078]
FIG. 12 shows an attachment structure of the inner end and the outer end of the mainspring 101 of the above embodiment. The mainspring 101 has an engagement end 101a having an opening at its inner end, and the engagement end 101a is engaged with the engagement portion 102a of the center member 102. The shape of the central member 102 is shown in detail in FIG. The engaging portion 102a of the central member 102 has a shape to be hooked on the engaging end 101a of the mainspring 101, and is inclined toward the engaging portion 102a so that the diameter gradually increases from the upper end of the central member 102. A tapered surface 102x is formed. The tapered surface 102x is configured to guide the insertion of the center member 102 from below toward the center of the mainspring 101 when the engaging portion 102a is engaged with the opening 101a at the inner end of the mainspring 101. It is. When the upper end of the center member 102 is inserted into the center of the mainspring 101, the inner end of the mainspring 101 is gradually expanded to the periphery by the tapered surface 102x, and the opening 101a at the inner end is eventually engaged with the center member 102. The fitting part 102a is fitted.
[0079]
On the other hand, at the outer end of the mainspring 101, a 外 -shaped engaging end 101b is provided. The engagement end 101b is engaged with an engagement protrusion 103x protruding inside the mainspring receiving portion 103. The engagement projection 103x is configured to cut a part of the outer peripheral wall of the mainspring accommodating portion 103 so as to project inward.
[0080]
As described above, when the engagement end 101b of the mainspring 101 is engaged with the engagement protrusion 103x protruding inward of the mainspring housing 103, the engagement end 101b of the mainspring 101 is positioned inside the engagement protrusion 103x. Is arranged on the center side by the amount of protrusion toward the mainspring 101, so that the mainspring 101 and the mainspring 101 are located on both sides in the spiral direction of the mainspring 101 (both clockwise and counterclockwise in the illustrated example) when viewed from the engaging end 101b. A gap is formed between the mainspring housing 103 and the inner peripheral surface. This is the same even when the mainspring 101 is unwound. Therefore, if the engaging head 105c of the power transmission member 105 is configured to be engaged with the mounting hole 103c in a portion where the gap is present, the mainspring 101 is actually assembled when the mainspring mechanism is assembled. Even in the unwound state (normally, when assembling the mainspring mechanism, the mainspring 101 cannot be held in the tightened state, so that the mainspring 101 is in the unwound state). The engaging head 105c of the member 105 can be inserted into the mounting hole 103c without any trouble and can be engaged.
[0081]
This is particularly effective when using the mounting method in which the engaging head 105c is inserted into the inside of the mounting hole 103c and engaged as described above, but is not limited to this method. There are cases. For example, when welding the end of the power transmission member 105 to the mainspring housing 103, if the mainspring 101 is not in contact with the inner surface of the welding portion, it is possible to prevent the spring 101 from being damaged by welding heat.
[0082]
The attachment portion of the power transmission member 105 to the mainspring accommodating portion 103 is preferably set within an angle range of θ = 45 degrees from the engagement projection 103x toward the spiral direction, particularly an angle range of θ = 30 degrees. It is more desirable to set within.
[0083]
FIG. 17 shows a method of forming the engagement protrusion 103x. In the present embodiment, first, as shown in FIG. 17A, a triangular recess 103f is formed on the outer peripheral surface of the mainspring housing 103 by cutting or the like. Next, as shown in FIG. 17B, the inside of the recess 103f is cut and pushed inward (for example, the press is cut off), so that the engagement protrusion 103x protruding into the spring housing 103 is formed. Is formed. At this time, a part of the inner surface of the previously formed recess 103f is provided as an inclined surface 103g at the tip of the engagement protrusion 103x. As shown in FIG. 17C, the inclined surface 103g easily and reliably engages with the engagement end 101b of the mainspring 101. In addition, in this manufacturing method, since burrs (burrs generated at the time of cutting) are less likely to be generated at the tip of the engagement projection 103x, the engagement of the engagement end 101b of the mainspring 101 is not hindered by the burrs. This has the advantage that damage to the engaging end 101b due to the burrs can be prevented.
[0084]
FIG. 13 illustrates a configuration example different from the above for the connection structure between the mainspring 101 and the mainspring housing 103. In this figure, the connection structure between the inner end of the mainspring 101 'and the center member 102 is the same as that of the above-described embodiment, and is not shown in detail. The outer end 101b 'of the mainspring 101' is provided with a slipping attachment 101c 'made of an elastic band. The slipping attachment 101c 'is in sliding contact with the inner peripheral surface 103y' of the mainspring accommodating portion 103 'so that both ends thereof are overlapped. In this configuration example, the inner peripheral surface 103y 'of the mainspring receiving portion 103' is formed of a smooth cylindrical inner surface.
[0085]
In the above configuration example, usually, the outer end 101b 'of the mainspring 101' is connected to the mainspring housing 103 'by friction between the outer surface of the slipping attachment 101c' and the inner peripheral surface 103y 'of the mainspring housing 103'. ing. Therefore, it is not necessary to provide a complicated engagement structure as in the above embodiment, and the assembling work can be easily performed. Here, if the mainspring 101 'is excessively tightened, the elastic force of the mainspring 101' overcomes the frictional force between the slipping attachment 101c 'and the inner peripheral surface 103y' of the mainspring receiving portion 103 '. ′ Slides inside the mainspring receiving portion 103 ′, so that excessive winding of the mainspring 101 ′ can be prevented.
[0086]
In the structure shown in FIG. 13, the structure shown in FIG. 12 may be adopted as a method for attaching the mainspring housing 103 ′ and the power transmission member 105, but the mainspring housing 103 slidingly contacting the slipping attachment 101 c ′. If the inner peripheral surface 103y 'is formed as a complete cylindrical inner surface and the slipping attachment 101c' is to be slid smoothly, the end of the power transmission member 105 is placed on the outer peripheral surface of the mainspring receiving portion 103 '. It is preferable to fix.
[0087]
FIG. 15 is a longitudinal sectional view showing a modification of the above embodiment. In this modification, the center member 102 is separated into an upper member 102A and a lower member 102B, and these members are configured as separate members. The upper member 102A and the lower member 102B are detachably fitted so as to be engaged only in the rotation direction. The other structure is exactly the same as the above embodiment.
[0088]
In this modification, the mainspring 101, the upper member 102A, and the upper case 103A of the mainspring housing 103 are assembled into an upper unit, and the lower member 102B and the braking unit 104 (including the lower case 103B of the mainspring housing 103 are included. ) Is assembled as a lower unit. Then, after assembling the upper unit and the lower unit separately as described above, the upper member 102A and the lower member 102B are fitted and connected in the rotation direction, and the upper case 103A and the lower case The internal structure of the support member 106 can be completed by fitting with 103B.
[0089]
In this way, the quality inspection can be performed separately on the upper unit and the lower unit in advance, so that the defective unit can be eliminated from the process before the completion of the internal structure, and the occurrence of defective products can be prevented. The rate can be reduced, and the yield can be improved. Further, in this structure, even when there is a problem with either the mainspring housing 103 or the braking unit 104, the upper unit and the lower unit can be easily separated, so that repair can be easily performed. There are advantages.
[0090]
FIG. 18 is a schematic perspective view showing the drawer device 10 as a specific example of a device using the mainspring mechanism 100 of the above embodiment. The drawer device 10 is configured such that the outer case body 11 and the inner case body 12 can be freely inserted and removed. A support member 106 is fixed to the inner side surface of the outer case body 11, and an outer mounting member 108 is engaged and held on the outer side surface of the inner case body 12. More specifically, a concave groove 12a is formed on the outer surface of the inner case body 12, and an engaging pin 12b is fixed inside the concave groove 12a. The engaging hook is engaged. Here, the mainspring mechanism 100 is arranged inside the concave groove 12a.
[0091]
In the drawer device 10, when the inner case body 12 is pulled out from the outer case body 11, the power transmission member 105 is fed out, and the mainspring (not shown) is tightened. When the inner case body 12 is pulled out to some extent, the holding member 12c urged by a spring or the like in a direction protruding from the outer side surface of the inner case body 12 fits into the concave portion 11c provided on the inner side surface of the outer case body 11. Thereby, the pulled-out state of the inner case body 12 is maintained as it is.
[0092]
On the other hand, when the inner case body 12 is to be stored in the outer case body 11, if the inner case body 12 is lightly pushed in or lightly pulled out, the holding member 12c once comes out of the concave portion 11c and is pushed in. The held state is released. Then, the inner case body 12 is drawn into the power transmission member 105 at a speed according to the balance between the driving force of the mainspring in the mainspring mechanism 100 and the braking force of the braking unit, and is slowly drawn into the outer case body 11. . The driven body of the drawer device 10 is the inner case body 12 described above.
[0093]
In various devices such as the drawer device 10 described above, the mainspring mechanism 100 of the present embodiment can be used in various modes. For example, in the drawer device 10 described above, the driving force of the mainspring mechanism 100 is used when the inner case body 12 is pulled in. On the contrary, the driving force of the mainspring mechanism 100 is used when the inner case body 12 is pulled out. It can also be configured as follows. For example, similarly to the above, the support member 106 is fixed to the outer case body 11, the power transmission member 105 is extended forward, and after passing through a pin or a fixed pulley fixed to the inner front end of the outer case body 11, The outer mounting member 108 at the front end is engaged with the rear end of the inner case body 12. When the inner case body 12 is pushed into the outer case body 12, the inner case body 12 is engaged with and held by the outer case body 11. For example, the front and rear parts of the inner case body 12 are provided with the concave portion 11c at the inner rear end of the outer case body 11 and the holding member 12c at the front end of the inner case body 12. With this configuration, when the inner case body 12 is pushed into the outer case body 11, the power transmission member 105 is extended through the pin or the fixed pulley, and the inner case body 12 is engaged with the outer case body 11 and held. Is done. In this state, when the inner case body 12 is lightly pushed in, the engagement of the inner case body 12 is released, and the power transmission member 105 is retracted by the driving force of the mainspring mechanism. Pulled out slowly.
[0094]
FIG. 14 shows the relationship between the operation stroke S of the mainspring mechanism 100 corresponding to various devices and the winding state of the power transmission member 105 when the mainspring mechanism 100 is used for various devices as described above. In the configuration shown in FIG. 14A, when the power transmission member 105 is largely extended within the range of the withdrawal stroke S of the power transmission member 105 corresponding to the operation stroke of the driven body of the device (in the case of the upper diagram) In addition, the number of turns of the power transmission member 105 around the mainspring housing 103 is less than 1, and the mounting end portion 105x of the power transmission member 105 with respect to the mainspring housing 103 is not covered by the upper layer of the power transmission member 105. On the other hand, when the power transmission member 105 is retracted within the range of the extraction stroke S (in the case shown in the figure below), the number of turns of the power transmission member 105 around the mainspring housing 103 becomes one or more, and The mounting end 105x is in a state of being covered by the upper layer of the power transmission member 105. With such a configuration, when the power transmission member 105 is repeatedly extended and retracted, the mounting end portion 105x is constantly covered by the upper layer portion of the power transmission member 105 and is repeatedly not covered. Will be. Therefore, since an impact is always applied to the mounting end 105x, the mounting end 105x of the power transmission member 105 and the upper layer portion abutting on the mounting end 105x are damaged, and in an extreme case, the power transmission is performed. This leads to breakage of the member 105, and as a result, the durability of the mainspring mechanism 100 is significantly reduced.
[0095]
On the other hand, in the device according to the present embodiment, as shown in FIG. 14B, even when the power transmission member 105 is extended most within the range of the withdrawal stroke S of the device, the power transmission member 105 Is one or more times around the mainspring accommodating portion 103, and the mounting end portion 105x is in a state of being covered by an upper layer portion. Therefore, the attachment end is always covered by at least one upper layer regardless of the amount of pulling out of the power transmission member 105, so that the abutting portion 105x and the upper layer abutting on the abutting portion 105x are not damaged. As a result, the durability of the mainspring mechanism 100 can be improved.
[Brief description of the drawings]
FIG. 1 is a perspective view of a mainspring mechanism of the present invention.
FIG. 2 is a longitudinal sectional view of a mainspring mechanism.
FIG. 3 is a cross-sectional view (a), a side view (b), an external view (c), and a plan view (d) and a cross-sectional view of another configuration example showing an attachment structure between a power transmission member and an external attachment member. (E).
FIG. 4 is a perspective view showing another configuration example of the mainspring mechanism.
FIG. 5 is a partial side view showing a structure for attaching a power transmission member to a mainspring accommodating portion.
FIG. 6 is a partial cross-sectional view showing a structure for attaching a power transmission member to a mainspring accommodating portion.
FIG. 7 is a perspective view showing another configuration example of the mainspring mechanism.
FIGS. 8A and 8B are explanatory diagrams showing a relationship between a configuration of a mainspring mechanism and a screwing direction of fixing means.
FIG. 9 is a cross-sectional view showing a one-way clutch mechanism as fixing means.
FIG. 10 is a plan view showing a manufacturing apparatus for setting an initial force of a mainspring mechanism.
FIGS. 11A and 11B are partially exploded perspective views showing a part of the manufacturing apparatus. FIGS.
FIG. 12 is a cross-sectional view showing a connection structure of the mainspring in the mainspring mechanism.
FIG. 13 is a cross-sectional view showing another configuration example of the connection structure of the mainspring.
FIGS. 14A and 14B are diagrams illustrating a relationship between an operation stroke and a winding state of a power transmission member.
FIG. 15 is a cross-sectional view showing another configuration example of the mainspring mechanism.
FIG. 16 is a plan view (a) and a side view (b) of a center member.
17 (a) to 17 (c) are views showing a method of manufacturing the engagement projection of the mainspring accommodating portion.
FIG. 18 is a schematic perspective view showing a configuration example of a device using a mainspring mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... apparatus (drawer apparatus), 11 ... outer case body, 12 ... inner case body, 100 ... spring mechanism, 101 ... spring, 102 ... center member, 103 ... spring accommodation part, 104 ... braking part, 105 ... power transmission member .. 106 support member 107 fixing means 108 external mounting member

Claims (32)

ゼンマイと、
前記ゼンマイの内端に接続された中心部材と、
前記ゼンマイの外端に接続されているとともに、前記中心部材の軸線周りに回転可能に軸支されたゼンマイ収容部と、
前記中心部材と前記ゼンマイ収容部との間に制動力を与える制動部と、
前記ゼンマイ収容部に端部が固定され、前記ゼンマイ収容部の外周に巻回された可撓性を備えた動力伝達部材と、
前記中心部材の両端を支持する支持部材と、を有し、
前記動力伝達部材は、前記支持部材に対して前記ゼンマイ収容部の回転とともに引き出し可能に構成されていることを特徴とするゼンマイ機構。With the mainspring,
A central member connected to the inner end of the mainspring;
A mainspring receiving portion connected to an outer end of the mainspring and rotatably supported around an axis of the central member,
A braking portion that applies a braking force between the center member and the mainspring housing portion,
An end portion fixed to the spring housing portion, a flexible power transmission member wound around the outer periphery of the spring housing portion,
And a support member that supports both ends of the center member,
The power transmission mechanism, wherein the power transmission member is configured to be able to be pulled out with the rotation of the mainspring accommodating portion with respect to the support member. 前記ゼンマイ収容部は、前記ゼンマイの軸線方向両側において前記中心部材に対して回転可能に軸支されていることを特徴とする請求項１に記載のゼンマイ機構。2. The mainspring mechanism according to claim 1, wherein the mainspring housing is rotatably supported on the center member on both sides of the mainspring in the axial direction. 3. 前記動力伝達部材の前記ゼンマイ収容部に固定された端部とは反対側の端部には、被動体に取り付けるための外部取付部材が固定されていることを特徴とする請求項１又は２に記載のゼンマイ機構。3. An external mounting member for mounting to a driven body is fixed to an end of the power transmission member opposite to an end fixed to the mainspring receiving portion. The mainspring mechanism described. 前記外部取付部材は、前記動力伝達部材を取り付けるための取付側面と、該取付側面とは反対側に設けられた、前記外部の部材に係合する係合フックとを有することを特徴とする請求項３に記載のゼンマイ機構。The external mounting member has a mounting side surface for mounting the power transmission member, and an engaging hook provided on an opposite side to the mounting side surface and engaging with the external member. Item 3. The mainspring mechanism according to Item 3. 前記支持部材は、前記ゼンマイ収容部を収容する容器形状を有するとともに、前記動力伝達部材を出し入れ可能に構成された開口部を備えていることを特徴とする請求項１又は２に記載のゼンマイ機構。The mainspring mechanism according to claim 1, wherein the support member has a shape of a container that houses the mainspring housing portion, and includes an opening configured to allow the power transmission member to be taken in and out. . 前記支持部材は、前記ゼンマイ収容部とほぼ同軸の略円筒形状に構成され、前記開口部は、前記略円筒形状の外周面のうちの軸線方向の一部に設けられ、前記外周面の軸線方向の残部が開口していないことを特徴とする請求項５に記載のゼンマイ機構。The support member is formed in a substantially cylindrical shape that is substantially coaxial with the mainspring receiving portion, and the opening is provided in a part of the outer circumferential surface of the substantially cylindrical shape in the axial direction, and the axial direction of the outer circumferential surface is The spring mechanism according to claim 5, wherein the remaining portion of the spring is not open. 前記動力伝達部材は条材であることを特徴とする請求項１乃至６のいずれか１に記載のゼンマイ機構。The spring mechanism according to any one of claims 1 to 6, wherein the power transmission member is a strip. 前記動力伝達部材は帯材であることを特徴とする請求項１乃至６のいずれか１項に記載のゼンマイ機構。The spring mechanism according to any one of claims 1 to 6, wherein the power transmission member is a band. 前記動力伝達部材の前記ゼンマイ収容部に固定された端部とは反対側の端部には、被動体に取り付けるための外部取付部材が固定され、
前記動力伝達部材の前記反対側の端部は前記外部取付部材の一側面である取付側面に沿って配置されるとともに固定孔が設けられ、前記取付側面には、前記固定孔に挿通固定された固定突起が設けられていることを特徴とする請求項８に記載のゼンマイ機構。At an end of the power transmission member opposite to the end fixed to the mainspring accommodating portion, an external mounting member for mounting to a driven body is fixed,
The opposite end of the power transmission member is disposed along a mounting side surface that is one side surface of the external mounting member, and a fixing hole is provided, and the mounting side surface is inserted and fixed in the fixing hole. The spring mechanism according to claim 8, further comprising a fixing protrusion. 前記取付側面上に、前記動力伝達部材よりも突出した突起が設けられていることを特徴とする請求項９に記載のゼンマイ機構。The spring mechanism according to claim 9, wherein a projection protruding from the power transmission member is provided on the mounting side surface. 前記取付側面上の前記ゼンマイ収容部方向寄りの端部に、前記取付側面から突出する端部突起が設けられていることを特徴とする請求項９又は１０に記載のゼンマイ機構。The mainspring mechanism according to claim 9 or 10, wherein an end projection protruding from the mounting side surface is provided at an end of the mounting side surface near the spring housing portion. 前記取付側面には、前記固定突起に対してずれた位置に係合突起が設けられ、前記動力伝達部材には、前記係合突起に係合する係合孔が設けられ、前記係合突起と前記係合孔とは、前記取付側面上において前記固定突起と前記係合突起とを結ぶ方向と直交する方向に余裕を持って係合していることを特徴とする請求項９乃至１１のいずれか１項に記載のゼンマイ機構。An engagement projection is provided on the mounting side surface at a position shifted from the fixing projection, and the power transmission member is provided with an engagement hole that engages with the engagement projection. 12. The method according to claim 9, wherein the engagement hole is engaged with a margin on the mounting side surface in a direction orthogonal to a direction connecting the fixing protrusion and the engagement protrusion. 2. The mainspring mechanism according to claim 1. 前記ゼンマイ収容部に前記動力伝達部材を取り付けるための取付孔が設けられ、前記動力伝達部材の端部は、前記取付孔の内部に配置される幅広の頭部と、前記取付孔に挿通される幅狭の挿通部とを有し、前記頭部が前記取付孔に係合していることを特徴とする請求項１乃至１２のいずれか１項に記載のゼンマイ機構。A mounting hole for mounting the power transmission member is provided in the mainspring receiving portion, and an end of the power transmission member is inserted through the wide head disposed inside the mounting hole and the mounting hole. The mainspring mechanism according to any one of claims 1 to 12, further comprising a narrow insertion portion, wherein the head is engaged with the mounting hole. 前記動力伝達部材の表面に接触し、前記動力伝達部材の表面に付着した異物を除去するための異物除去手段が前記支持部材の前記開口部の開口縁に設けられていることを特徴とする請求項５又は６に記載のゼンマイ機構。Foreign matter removing means for contacting the surface of the power transmission member and removing foreign matter attached to the surface of the power transmission member is provided at an opening edge of the opening of the support member. Item 7. The mainspring mechanism according to item 5 or 6. 前記中心部材の端部には、外部に露出し、軸線周りの回転方向に係合可能な回転係合構造が設けられていることを特徴とする請求項１乃至１４のいずれか１項に記載のゼンマイ機構。The end portion of the center member is provided with a rotation engagement structure that is exposed to the outside and is engageable in a rotation direction around an axis. Of the mainspring mechanism. 前記中心部材を前記支持部材に対して固定する固定手段が設けられていることを特徴とする請求項１乃至１４のいずれか１項に記載のゼンマイ機構。The mainspring mechanism according to any one of claims 1 to 14, further comprising fixing means for fixing the center member to the support member. 前記固定手段は、前記中心部材に螺合して前記支持部材を締め付け固定するネジであることを特徴とする請求項１６に記載のゼンマイ機構。17. The mainspring mechanism according to claim 16, wherein the fixing means is a screw that is screwed into the center member to tighten and fix the support member. 前記固定手段と前記支持部材の少なくとも一方における他方に接触する部分に凹部が設けられ、当該凹部には前記固定手段と前記支持部材とを接着する接着剤が配置されていることを特徴とする請求項１７に記載のゼンマイ機構。A concave portion is provided at a portion of at least one of the fixing means and the support member which contacts the other, and an adhesive for bonding the fixing means and the support member is arranged in the concave portion. Item 19. The mainspring mechanism according to Item 17. 前記固定手段と前記支持部材の少なくとも一方における他方に接触する部分に凹凸面が設けられていることを特徴とする請求項１７に記載のゼンマイ機構。The mainspring mechanism according to claim 17, wherein an uneven surface is provided at a portion of at least one of the fixing unit and the support member that contacts the other. 前記固定手段の締付方向は、前記中心部材が前記ゼンマイにより受ける回転力の回転方向とは逆方向であることを特徴とする請求項１６乃至１９のいずれか１項に記載のゼンマイ機構。The mainspring mechanism according to any one of claims 16 to 19, wherein a tightening direction of the fixing means is opposite to a rotational direction of a rotational force applied to the central member by the mainspring. 前記中心部材と前記支持部材との間に、前記ゼンマイの巻き締め方向には前記中心部材の回転を許容し、前記巻き締め方向とは逆方向には前記中心部材の回転を禁止するワンウェイクラッチ機構が設けられていることを特徴とする請求項１６に記載のゼンマイ機構。A one-way clutch mechanism between the center member and the support member, the rotation of the center member being allowed in a direction in which the mainspring is tightened, and the rotation of the center member being prohibited in a direction opposite to the winding direction; 17. The mainspring mechanism according to claim 16, wherein a spring is provided. 前記中心部材は、前記ゼンマイの内端に接続された第１中心部材と、前記制動部に接続された第２中心部材とを有し、前記第１中心部材と前記第２中心部材が同軸で回転方向に係合し、かつ、着脱可能に構成されていることを特徴とする請求項１乃至２１のいずれか１項に記載のゼンマイ機構。The center member has a first center member connected to an inner end of the mainspring, and a second center member connected to the braking unit, and the first center member and the second center member are coaxial. The mainspring mechanism according to any one of claims 1 to 21, wherein the mainspring mechanism is configured to engage in a rotational direction and to be detachable. 前記ゼンマイ収容部には、その外周壁の一部が切断されて内側に突出してなる係合突部が設けられ、当該係合突部に前記ゼンマイの外端が係合していることを特徴とする請求項１乃至２２のいずれか１項に記載のゼンマイ機構。The mainspring accommodating portion is provided with an engaging projection formed by cutting a part of an outer peripheral wall and projecting inward, and an outer end of the mainspring is engaged with the engaging projection. The mainspring mechanism according to any one of claims 1 to 22, wherein 前記動力伝達部材の前記ゼンマイ収容部に対する取付位置は、前記ゼンマイ収容部に対する前記ゼンマイの取付位置に対し、前記ゼンマイの渦巻き方向両側の近傍に設けられていることを特徴とする請求項２３に記載のゼンマイ機構。24. The attachment position of the power transmission member with respect to the mainspring accommodating portion is provided in the vicinity of both sides of the mainspring in the spiral direction with respect to the attachment position of the mainspring with respect to the mainspring accommodating portion. Of the mainspring mechanism. 前記ゼンマイ収容部は略円筒状の内面を有し、前記ゼンマイの外端は、当該内面に対して摺接し、その拡径力により前記内面との間に生ずる摩擦力に基づいて前記ゼンマイ収容部との接続が確保されているとともに、過剰な回転力を受けた場合には前記ゼンマイ収容部の前記内面上を摺動可能に構成されていることを特徴とする請求項１乃至２２のいずれか１項に記載のゼンマイ機構。The mainspring receiving portion has a substantially cylindrical inner surface, and an outer end of the mainspring slidably contacts the inner surface, and the mainspring receiving portion is formed based on a frictional force generated between the mainspring and the inner surface due to the expanding force. 23. A connection between the mainspring and the mainspring receiving portion is configured to be slidable when an excessive rotational force is received. 2. The mainspring mechanism according to item 1. 前記中心部材には、前記ゼンマイの内端に係合する係合突起を有し、当該係合突起の軸線方向の上側若しくは下側のうちいずれか一方側の側面は、前記軸線方向斜め上側若しくは下側に向いた傾斜面となっていることを特徴とする請求項１乃至２５のいずれか１項に記載のゼンマイ機構。The center member has an engagement protrusion that engages with an inner end of the mainspring, and a side surface on one of an upper side and a lower side in the axial direction of the engagement protrusion is obliquely upward on the axial direction or The mainspring mechanism according to any one of claims 1 to 25, wherein the mainspring mechanism has an inclined surface facing downward. ゼンマイと、前記ゼンマイの内端に接続された中心部材と、前記ゼンマイの外端に接続されているとともに、前記中心部材の軸線周りに回転可能に軸支されたゼンマイ収容部と、前記中心部材と前記ゼンマイ収容部との間に制動力を与える制動部と、前記ゼンマイ収容部に端部が固定され、前記ゼンマイ収容部の外周に巻回された動力伝達部材と、前記中心部材の両端を支持する支持部材とを有し、前記支持部材に対して前記動力伝達部材を引き出し可能に構成されるゼンマイ機構の製造方法であって、
前記動力伝達部材の引き出し量を変化させながら前記動力伝達部材の引き込み力を測定し、既定の前記引き込み力が得られたときに、前記動力伝達部材を既定位置で切断し、これにより得られた前記動力伝達部材の端部に、外部の部材に取り付けるための外部取付部材を接続させることを特徴とするゼンマイ機構の製造方法。A mainspring, a central member connected to an inner end of the mainspring, a mainspring receiving portion connected to an outer end of the mainspring, and rotatably supported around an axis of the central member; and And a braking portion that applies a braking force between the mainspring housing portion, an end portion fixed to the mainspring housing portion, a power transmission member wound around an outer periphery of the mainspring housing portion, and both ends of the central member. A method of manufacturing a mainspring mechanism, comprising: a supporting member that supports the power transmitting member;
The pull-in force of the power transmission member was measured while changing the amount of pull-out of the power transmission member, and when the predetermined pull-in force was obtained, the power transmission member was cut at a predetermined position, thereby obtaining the power transmission member. A method of manufacturing a mainspring mechanism, wherein an external mounting member for mounting to an external member is connected to an end of the power transmission member. ゼンマイと、前記ゼンマイの内端に接続された中心部材と、前記ゼンマイの外端に接続されているとともに、前記中心部材の軸線周りに回転可能に軸支されたゼンマイ収容部と、前記中心部材と前記ゼンマイ収容部との間に制動力を与える制動部と、前記ゼンマイ収容部に端部が固定され、前記ゼンマイ収容部の外周に巻回された動力伝達部材と、前記中心部材の両端を支持する支持部材とを有し、前記支持部材に対して前記動力伝達部材を引き出し可能に構成されるゼンマイ機構の製造方法であって、
前記ゼンマイ収容部の外面に凹部を形成し、次に、当該凹部の内部を切断して前記ゼンマイ収容部の内側に突出させることにより、前記ゼンマイの外端を係合させるための係合突部を形成することを特徴とするゼンマイ機構の製造方法。A mainspring, a central member connected to an inner end of the mainspring, a mainspring receiving portion connected to an outer end of the mainspring, and rotatably supported around an axis of the central member; and And a braking portion that applies a braking force between the mainspring housing portion, an end portion fixed to the mainspring housing portion, a power transmission member wound around an outer periphery of the mainspring housing portion, and both ends of the central member. A method of manufacturing a mainspring mechanism, comprising: a supporting member that supports the power transmitting member;
An engaging projection for engaging the outer end of the mainspring by forming a concave portion on the outer surface of the mainspring housing and then cutting the inside of the concave portion so as to protrude inside the mainspring housing portion. Forming a spring mechanism. ゼンマイと、前記ゼンマイの内端に接続された中心部材と、前記ゼンマイの外端に接続されているとともに、前記中心部材の軸線周りに回転可能に軸支されたゼンマイ収容部と、前記中心部材と前記ゼンマイ収容部との間に制動力を与える制動部と、前記ゼンマイ収容部に端部が固定され、前記ゼンマイ収容部の外周に巻回された動力伝達部材と、前記中心部材の両端を支持する支持部材と、前記中心部材と前記支持部材を固定する固定手段とを有し、前記支持部材に対して前記動力伝達部材を引き出し可能に構成されるゼンマイ機構の製造方法であって、
前記固定手段による前記中心部材と前記支持部材の固定状態を解除し、前記動力伝達部材の引き出し量を適宜に設定して、前記中心部材を回転させながら前記動力伝達部材の引き込み力を測定し、前記引き込み力が既定値になったときに、前記固定手段により前記中心部材と前記支持部材を固定することを特徴とするゼンマイ機構の製造方法。A mainspring, a central member connected to an inner end of the mainspring, a mainspring receiving portion connected to an outer end of the mainspring, and rotatably supported around an axis of the central member; and And a braking portion that applies a braking force between the mainspring housing portion, an end portion fixed to the mainspring housing portion, a power transmission member wound around an outer periphery of the mainspring housing portion, and both ends of the central member. A method of manufacturing a mainspring mechanism, comprising: a supporting member for supporting; and a fixing unit for fixing the center member and the supporting member, and the power transmission member is configured to be able to be pulled out with respect to the supporting member.
Release the fixed state of the center member and the support member by the fixing means, set the amount of withdrawal of the power transmission member appropriately, measure the retraction force of the power transmission member while rotating the center member, A method of manufacturing a mainspring mechanism, comprising: fixing the center member and the support member by the fixing means when the retraction force reaches a predetermined value. ゼンマイと、前記ゼンマイの内端に接続された中心部材と、前記ゼンマイの外端に接続されているとともに、前記中心部材の軸線周りに回転可能に軸支されたゼンマイ収容部と、前記中心部材と前記ゼンマイ収容部との間に制動力を与える制動部と、前記ゼンマイ収容部に端部が固定され、前記ゼンマイ収容部の外周に巻回された動力伝達部材と、前記中心部材の両端を支持する支持部材と、前記中心部材と前記支持部材を固定する固定手段とを有し、前記支持部材に対して前記動力伝達部材を引き出し可能に構成されるゼンマイ機構の製造装置であって、
前記支持部材を固定するための固定台と、当該固定台に前記支持部材が固定された設置状態において前記中心部材に接続されて前記中心部材を回転させるための回転操作手段と、前記設置状態で前記動力伝達部材を既定の引き出し量を有する状態に保持するとともに、前記動力伝達部材の引き込み力を測定する応力検出手段と、を有することを特徴とするゼンマイ機構の製造装置。A mainspring, a central member connected to an inner end of the mainspring, a mainspring receiving portion connected to an outer end of the mainspring, and rotatably supported around an axis of the central member; and And a braking portion that applies a braking force between the mainspring housing portion, an end portion fixed to the mainspring housing portion, a power transmission member wound around an outer periphery of the mainspring housing portion, and both ends of the central member. An apparatus for manufacturing a mainspring mechanism, comprising: a support member for supporting; and a fixing unit for fixing the center member and the support member, and the power transmission member is configured to be able to be pulled out with respect to the support member.
A fixing base for fixing the support member, rotation operation means for rotating the center member connected to the center member in an installation state in which the support member is fixed to the fixing base, and An apparatus for manufacturing a mainspring mechanism, comprising: a stress detection unit configured to hold the power transmission member at a predetermined amount of withdrawal and to measure a pull-in force of the power transmission member. 請求項１乃至２６のいずれか１項に記載のゼンマイ機構と、当該ゼンマイ機構の前記動力伝達部材若しくは前記外部取付部材に接続された被動体とを有することを特徴とする機器。An apparatus comprising: the mainspring mechanism according to any one of claims 1 to 26; and a driven body connected to the power transmission member or the external mounting member of the mainspring mechanism. 前記被動体の動作ストロークの範囲内において、前記動力伝達部材の前記ゼンマイ収容部に取り付けられてなる取付部分は、巻回された前記動力伝達部材の上層部分に常に覆われるように構成されていることを特徴とする請求項３１に記載の機器。Within the range of the operation stroke of the driven body, an attachment portion of the power transmission member attached to the mainspring accommodating portion is configured to be always covered by an upper layer portion of the wound power transmission member. 32. The device of claim 31, wherein:
JP2002359764A 2002-12-11 2002-12-11 Main spring system, method and apparatus for manufacturing main spring system, and equipment using this main spring system Withdrawn JP2004190581A (en)

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* Cited by examiner, † Cited by third party
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JP2008298079A (en) * 2007-05-31 2008-12-11 Wo Huen Poon Wind turbine generator and assembly with it

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