JP2003013993A

JP2003013993A - Manual operation means having overload releasing mechanism in bed or the like

Info

Publication number: JP2003013993A
Application number: JP2001199941A
Authority: JP
Inventors: Akio Ishimoto; 昭雄石本
Original assignee: Paramount Bed Co Ltd
Current assignee: Paramount Bed Co Ltd
Priority date: 2001-06-29
Filing date: 2001-06-29
Publication date: 2003-01-15

Abstract

PROBLEM TO BE SOLVED: To prevent damage of a mechanism portion or the like such as a bed by releasing driving force while operating the portion beyond a range of motions. SOLUTION: A bearing 4 is engaged with a receiving hole 6 on a bottom surface inside a handle body 3. The bearing 4 provides an externally taper- shaped inserting portion 4a inserted into an engaged with a receiving hole 6 inside the handle body 3 and a flanged portion 4b. A leaf spring member 13 as a received means and a leaf spring holding member 14 holding the leaf spring member 13 as an overload releasing mechanism are mounted on a retaining portion 2b of a driving shaft 2. The leaf spring member 13 is kept in contact with a gear portion 15 formed ion the flanged portion 4b of the bearing 4 in an engaged state.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、動作範囲を越えて
操作しても、駆動力を逃がして、作動すべきベッド等
（例えば病院用ベッド、ストレッチャー、在宅ベッド）
の機構部等の破損を防止することができるようにした、
ベッド等における過負荷解放機能を有する手動操作手段
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed or the like (eg, a hospital bed, a stretcher, a home bed) which should be operated by releasing the driving force even if the operation is performed beyond the operating range.
It is possible to prevent damage to the mechanical parts of
The present invention relates to a manual operation means having an overload releasing function in a bed or the like.

【０００２】[0002]

【従来の技術】従来から、様々なベッド等の機構部に動
力を与える手動操作手段として、例えばクランクハンド
ルが、製品化されてきた。2. Description of the Related Art Conventionally, for example, a crank handle has been commercialized as a manual operation means for giving power to various mechanical parts such as beds.

【０００３】[0003]

【発明が解決しようとする課題】かかるクランクハンド
ルにおいて、機構部に必要範囲を越えて動力を与えた場
合、クランクハンドル自体、クランクハンドルと機構部
の連結手段、機構部の破損のおそれがあり、クランクハ
ンドルから機構部に至る箇所に、機構部に必要範囲を越
えて動力が伝わらないようにする手段が求められてい
る。本発明は、このような背景から提案されたものであ
って、動作範囲を越えて操作しても、駆動力を逃がし
て、ベッド等の機構部等の破損を防止することができる
ようにした、ベッド等における過負荷解放機能を有する
手動操作手段を提供することを目的とする。In such a crank handle, when power is applied to the mechanism portion beyond the necessary range, the crank handle itself, the connecting means between the crank handle and the mechanism portion, and the mechanism portion may be damaged. There is a demand for means for preventing the power from being transmitted to the mechanism section beyond the required range, from the crank handle to the mechanism section. The present invention has been proposed from such a background, and it is possible to release the driving force and prevent the mechanical parts such as the bed from being damaged even if the operation is performed beyond the operating range. An object of the present invention is to provide a manual operation means having an overload releasing function in a bed or the like.

【０００４】[0004]

【課題を解決するための手段】前記した課題を達成する
ために、本発明では、請求項１において、作動すべきベ
ッド等の機構部に連結する駆動軸と、駆動軸を回動操作
してなるハンドル本体とを有し、前記ハンドル本体は、
一端寄りの内面に、前記駆動軸を過負荷解放機構を介し
て保持すると共に、他端寄りにハンドル本体を回動操作
する握部とを有し、前記過負荷解放機構は、前記ハンド
ル本体側に保持してなる原動手段と駆動軸側に保持して
なる受動手段とを有し、前記原動手段と受動手段とは、
圧接手段により駆動軸回転方向を含む面に対して傾斜し
た角度で、圧接した構成とし、前記ハンドル本体を機構
部動作限界を越えて操作することで、前記原動手段と受
動手段との圧接力に抗して、ハンドル本体および原動手
段を、受動手段および駆動軸に対して空転させてなるベ
ッド等における過負荷解放機能を有する手動操作手段を
開示する。また本発明では、請求項２において、前記駆
動軸は、前記ハンドル本体に挿通して取り付ける断面丸
棒状の先端部と、断面多角形状の保持部と、前記機構部
に結合する結合部とを有し、前記原動手段は、ハンドル
本体内底面に向かって絞り込んでなる形状の受穴に保持
してなる軸受によって構成し、この軸受にフランジ部を
設けてフランジ部にギヤ部を形成し、前記受動手段は、
駆動軸における保持部に保持してなる板ばね部材によっ
て構成して、この板ばね部材の円周方向に指向する複数
のばね片を形成すると共に、これらばね片の先端側に屈
曲部を形成して、前記軸受のフランジ部におけるギヤ部
に前記板ばね部材の屈曲部を歯合させるようにし、前記
ハンドル本体を機構部動作限界を越えて操作すること
で、前記板ばね部材における屈曲部が前記軸受のフラン
ジ部におけるギヤ部を乗り越えて、ハンドル本体および
軸受を、駆動軸に対して空転させてなるベッド等におけ
る過負荷解放機能を有する手動操作手段を開示する。ま
た本発明では、請求項３において、前記駆動軸は、前記
ハンドル本体に挿通して取り付ける断面丸棒状の先端部
と、前記機構部に結合する結合部とを有し、前記原動手
段は、前記駆動軸の先端部に回動可能に保持すると共
に、ハンドル本体側に固定してなる板ばね部材によって
構成し、前記受動手段は前記駆動軸に固設してなるクラ
ッチ部材によって構成し、前記板ばね部材に、爪部を切
り起こし形成する一方、前記クラッチ部材に、前記板ば
ね部材の爪部に対向して切込部を形成し、板ばね部材に
おける爪部を、前記クラッチ部材の切込部に係止した状
態で、前記板ばね部材とクラッチ部材とをハンドル本体
に組み込んでなり、前記ハンドル本体を機構部動作限界
を越えて操作することで、前記板ばね部材における爪部
が前記クラッチ部材の切込部を乗り越えて、ハンドル本
体および板ばね部材を、クラッチ部材に対して空転させ
てなるベッド等における過負荷解放機能を有する手動操
作手段を開示する。また本発明では、請求項４におい
て、前記駆動軸は、前記ハンドル本体に挿通して取り付
ける断面丸棒状の先端部と、断面多角形状の保持部と、
前記機構部に結合する結合部とを有し、前記原動手段は
ハンドル本体内においてハンドル本体側に保持してなる
軸受によって構成し、前記受動手段は、前記駆動軸にお
ける断面多角形状の保持部に保持した、板ばね押さえと
第１の板ばね部材と、前記駆動軸の先端部側に回動可能
に保持したクラッチ部材と、第２の板ばね部材とによっ
て構成し、前記第１板ばね部材は、先端を前記クラッチ
部材側に突出させると共に円周一方向に指向させてなる
爪部を有し、前記クラッチ部材の第１板ばね部材と対向
する面に、前記爪部が係止すべき切込部を有し、この切
込部は、円周一方向側に位置する鉛直部と、円周他方向
側に指向する緩斜面部とを有し、前記クラッチ部材の第
２板ばね部材側に対向する側に、クラッチ部材と共に第
２板ばね部材を連動回動するための連結突部を有し、前
記第２板ばね部材は、前記第１板ばね部材における爪部
とは逆方向に、且つ軸受に対向する側に突出形成した爪
部を有し、前記軸受の第２板ばね部材に対向する側に、
第２板ばね部材の爪部に対応して形成した切込部を有
し、この切込部は、円周他方向側に位置する鉛直部と、
円周一方向側に指向する緩斜面部とを有し、前記ハンド
ル本体を円周一方向側に機構部動作限界を越えて操作す
ることで、第１板ばね部材における爪部がクラッチ部材
における切込部の緩斜面部を乗り越えて、ハンドル本
体、軸受、第２板ばね部材およびクラッチ部材を、第１
板ばね部材に対して空転させ、前記ハンドル本体を円周
他方向側に機構部動作限界を越えて操作することで、第
２板ばね部材における爪部が、軸受における切込部の緩
斜面部を乗り越えて、ハンドル本体および軸受を、第２
板ばね部材に対して空転させてなるベッド等における過
負荷解放機能を有する手動操作手段を開示する。また本
発明では、請求項５において、前記駆動軸は、前記ハン
ドル本体に挿通して取り付ける断面丸棒状の先端部と、
断面多角形状の保持部と、前記機構部に結合する結合部
とを有し、前記原動手段はハンドル本体内においてハン
ドル本体側に保持してなる軸受によって構成し、前記受
動手段は、前記駆動軸における断面多角形状の保持部に
保持した、板ばね押さえと第１の板ばね部材と、前記駆
動軸の先端部側に回動可能に保持したクラッチ部材と、
第２の板ばね部材とによって構成し、前記第１板ばね部
材は、先端を前記クラッチ部材側に突出させると共に円
周一方向に指向させてなる爪部を有し、前記クラッチ部
材の第１板ばね部材と対向する面に、前記爪部が係止す
べき切込部を有し、この切込部は、円周一方向側に位置
する鉛直部と、円周他方向側に指向する緩斜面部とを有
し、前記クラッチ部材と第２板ばね部材とを、駆動軸の
先端部に保持した外形多角形状のカラーによって連動回
転させる構造とし、前記第２板ばね部材は、前記第１板
ばね部材における爪部とは逆方向に、且つ軸受に対向す
る側に突出形成した爪部を有し、前記軸受の第２板ばね
部材に対向する側に、第２板ばね部材の爪部に対応して
形成した切込部を有し、この切込部は、円周他方向側に
位置する鉛直部と、円周一方向側に指向する緩斜面部と
を有し、前記ハンドル本体を円周一方向側に機構部動作
限界を越えて操作することで、第１板ばね部材における
爪部がクラッチ部材における切込部の緩斜面部を乗り越
えて、ハンドル本体、軸受、第２板ばね部材およびクラ
ッチ部材を、第１板ばね部材に対して空転させ、前記ハ
ンドル本体を円周他方向側に機構部動作限界を越えて操
作することで、第２板ばね部材における爪部が、軸受に
おける切込部の緩斜面部を乗り越えて、ハンドル本体お
よび軸受を、第２板ばね部材に対して空転させてなるベ
ッド等における過負荷解放機能を有する手動操作手段を
開示する。また本発明では、請求項６において、前記駆
動軸は、前記ハンドル本体に挿通して取り付ける断面丸
棒状の先端部と、断面多角形状の保持部と、前記機構部
に結合する結合部とを有し、前記原動手段は、ハンドル
本体内底面に向かって絞り込んでなる形状の受穴に保持
してなる軸受によって構成し、この軸受にフランジ部を
設けてフランジ部にギヤ部を形成し、前記受動手段は、
前記駆動軸における保持部に保持したばね部材と、ばね
押さえと、スペーサとによって構成し、前記軸受のばね
部材との対向面に、中心の最深部から内部斜面が双方に
等角度拡開する断面三角溝を形成し、ばね部材側に断面
三角歯を形成して、軸受の三角溝とばね部材の三角歯を
歯合させ、前記ばね部材は、中心に駆動軸の保持部に嵌
挿するための多角穴を有し、前記ハンドル本体を円周双
方向に機構部動作限界を越えて操作することで、ばね部
材側の三角歯が軸受の三角溝側の内部斜面を乗り越え
て、ハンドル本体および軸受を、ばね部材に対して空転
させてなるベッド等における過負荷解放機能を有する手
動操作手段を開示する。また本発明では、請求項７にお
いて、前記駆動軸は、前記ハンドル本体に挿通して取り
付ける断面丸棒状の先端部と、断面多角形状の保持部
と、前記機構部に結合する結合部とを有し、前記原動手
段は、ハンドル本体内底面に向かって絞り込んでなる形
状の受穴に保持してなる軸受によって構成し、この軸受
にフランジ部を設けてフランジ部に切込部を形成し、前
記受動手段は、前記駆動軸における保持部に保持してな
るクラッチ部材によって構成し、このクラッチ部材はコ
イルばね押さえによって支持したコイルばねの弾発力に
よって、軸受におけるフランジ部に形成した切込部に、
クラッチ部材側に形成した傾斜突部を噛み合わせる構成
とし、前記軸受における切込み部は、鉛直部と緩斜面部
とを有し、前記クラッチ部材の傾斜突部は、前記切込部
の緩斜面部に当接する傾斜突面と、鉛直面部とを有し、
前記ハンドル本体を機構部動作限界を越えて操作するこ
とで、前記クラッチ部材の傾斜突面が前記軸受における
切込部の緩斜面部を乗り越えて、ハンドル本体および軸
受を、クラッチ部材に対して空転させてなるベッド等に
おける過負荷解放機能を有する手動操作手段を開示す
る。さらに本発明では、請求項８において、前記原動手
段は前記ハンドル本体内に形成したギヤによって構成
し、前記受動手段は、ハンドル本体に挿通した、ベッド
等の機構部に連なるシャフトと、シャフト側に形成した
ギヤとによって構成して、キャップによって保持したコ
イルばねによって押し込み噛み合わせるようにし、前記
ハンドル本体を機構部動作限界を越えて操作すること
で、ハンドル本体内のギヤが、シャフト側のギヤを乗り
越えて、ハンドル本体をシャフト側に対し、空転させて
なるベッド等における過負荷解放機能を有する手動操作
手段を開示する。In order to achieve the above-mentioned object, in the present invention, in claim 1, a drive shaft connected to a mechanism portion such as a bed to be operated and a drive shaft are rotatably operated. And a handle body that is
The inner surface near one end has a grip for holding the drive shaft through an overload releasing mechanism and rotating the handle body near the other end, and the overload releasing mechanism is provided on the handle body side. The driving means and the passive means held on the drive shaft side, the driving means and the passive means,
The pressure contact means presses the surface at an angle inclined with respect to the surface including the rotation direction of the drive shaft, and the handle body is operated beyond the operation limit of the mechanical portion, so that the contact force between the driving means and the passive means is increased. On the contrary, a manual operation means having an overload releasing function in a bed or the like is disclosed in which the handle body and the driving means are idled with respect to the passive means and the drive shaft. Further, according to the present invention, in claim 2, the drive shaft has a distal end portion having a round bar shape in cross section and attached to the handle body, a holding section having a polygonal cross section, and a coupling section coupled to the mechanism section. The drive means is constituted by a bearing held in a receiving hole that is narrowed toward the bottom surface inside the handle body, and a flange portion is provided on this bearing to form a gear portion on the flange portion. The means is
The leaf spring member is held by a holding portion of the drive shaft to form a plurality of spring pieces oriented in the circumferential direction of the leaf spring member, and a bent portion is formed on the tip side of the spring pieces. Then, the bent portion of the leaf spring member is engaged with the gear portion of the flange portion of the bearing, and the handle body is operated beyond the operating limit of the mechanical portion, so that the bent portion of the leaf spring member is Disclosed is a manual operation means having an overload releasing function in a bed or the like which is formed by surmounting a gear portion in a flange portion of a bearing and idly rotating a handle body and a bearing with respect to a drive shaft. Further, in the present invention, in claim 3, the drive shaft has a tip end portion having a round bar shape in cross section which is inserted into the handle main body and is attached, and a connecting portion which is connected to the mechanism portion, and the drive means is The leaf spring member is rotatably held at the tip of the drive shaft and is fixed to the handle body side, and the passive means is a clutch member fixed to the drive shaft. The spring member is formed by cutting and raising the claw portion, while the clutch member is formed with a notch portion facing the claw portion of the leaf spring member, and the claw portion of the leaf spring member is cut by the clutch member. The leaf spring member and the clutch member are incorporated in the handle body in a state of being locked to the handle portion, and the claw portion of the leaf spring member is operated by operating the handle body beyond the operation limit of the mechanism portion. Department Overcame notches, the handle body and the plate spring member, discloses a manual actuating means with an overload release function in bed or the like to be allowed to idle relative to the clutch member. Further, in the present invention, in claim 4, the drive shaft includes a distal end portion having a round bar shape in cross section and attached to the handle body, and a holding portion having a polygonal cross section.
The driving means comprises a bearing held on the handle body side in the handle body, and the passive means is a holding portion having a polygonal cross section in the drive shaft. The first leaf spring member includes a leaf spring retainer and a first leaf spring member that are held, a clutch member that is rotatably held on the tip end side of the drive shaft, and a second leaf spring member. Has a claw portion having a tip projecting toward the clutch member and directed in one direction of the circumference, and a cutting portion to which the claw portion is to be locked on a surface of the clutch member facing the first leaf spring member. The cut portion has a vertical portion located on one side of the circumference and a gentle slope portion directed to the other direction of the circumference, and is provided on the second leaf spring member side of the clutch member. On the opposite side, connect the second leaf spring member together with the clutch member. The second plate spring member has a connecting projection for rotating, and the second plate spring member has a claw part projecting in a direction opposite to the claw part of the first plate spring member and on the side facing the bearing. , On the side of the bearing facing the second leaf spring member,
A cut portion formed corresponding to the claw portion of the second leaf spring member, the cut portion having a vertical portion located on the other side of the circumference;
And a gentle slope portion directed toward one side of the circumference, and by operating the handle main body toward the one direction of the circumference beyond the operation limit of the mechanism section, the claw portion of the first leaf spring member makes a cut in the clutch member. Of the handle body, the bearing, the second leaf spring member, and the clutch member over the gentle slope of the first portion.
By rotating the handle body idly with respect to the leaf spring member and operating the handle main body in the other direction of the circumference beyond the operation limit of the mechanism portion, the claw portion of the second leaf spring member causes the gentle slope portion of the notch portion of the bearing. The handle body and bearing to the second
Disclosed is a manual operation means having an overload releasing function in a bed or the like which is made to idle with respect to a leaf spring member. Further, in the present invention, in claim 5, the drive shaft includes a distal end portion having a round bar shape in cross section, which is inserted into the handle body and attached.
The driving means comprises a bearing having a polygonal cross section and a coupling portion that is coupled to the mechanism portion, and the driving means is constituted by a bearing held on the handle body side in the handle body, and the passive means is the drive shaft. A leaf spring retainer and a first leaf spring member held by a holding portion having a polygonal cross section, and a clutch member rotatably held on the tip end side of the drive shaft.
The first plate spring member includes a second plate spring member, and the first plate spring member has a claw portion having a tip protruding toward the clutch member and directed in one direction of the circumference, and the first plate of the clutch member. The surface facing the spring member has a cut portion to be locked by the claw portion, and the cut portion has a vertical portion located on one side in the circumferential direction and a gently sloped surface directed to the other side in the circumferential direction. And a structure in which the clutch member and the second leaf spring member are interlockedly rotated by a polygonal outer shape collar held at the tip of the drive shaft, and the second leaf spring member is the first leaf plate. The spring member has a claw portion projecting in a direction opposite to the claw portion and on a side facing the bearing, and a claw portion of the second leaf spring member is provided on a side of the bearing facing the second leaf spring member. It has a notch formed correspondingly, and this notch has a vertical part located on the other side of the circumference. And a gentle slope portion directed toward one side of the circumference, and by operating the handle main body toward the one direction of the circumference beyond the operation limit of the mechanism section, the claw portion of the first leaf spring member makes a cut in the clutch member. Over the gentle slope of the section, the handle body, the bearing, the second leaf spring member and the clutch member are idly rotated with respect to the first leaf spring member, and the handle body is moved to the other side of the circumference to limit the operation of the mechanical portion. By operating it beyond, the claw portion of the second leaf spring member rides over the gentle slope portion of the notch of the bearing, and the handle body and the bearing are idled with respect to the second leaf spring member. Discloses a manual operation means having an overload releasing function. Further, according to the present invention, in claim 6, the drive shaft has a distal end portion having a round bar shape in cross section and attached to the handle body, a holding section having a polygonal cross section, and a coupling section coupled to the mechanism section. The drive means is constituted by a bearing held in a receiving hole that is narrowed toward the bottom surface inside the handle body, and a flange portion is provided on this bearing to form a gear portion on the flange portion. The means is
A cross section formed by a spring member held by a holding portion of the drive shaft, a spring retainer, and a spacer, and a surface facing the spring member of the bearing in which the inner slope extends from the deepest part in the center to both sides at an equal angle. To form a triangular groove and form a triangular tooth in cross section on the spring member side so that the triangular groove of the bearing and the triangular tooth of the spring member mesh with each other, and the spring member is fitted in the holding portion of the drive shaft at the center. By operating the handle body bidirectionally in the circumferential direction beyond the operating limit of the mechanical part, the triangular teeth on the spring member side pass over the internal slope on the triangular groove side of the bearing, and the handle body and Disclosed is a manual operation means having an overload releasing function in a bed or the like in which a bearing is idled with respect to a spring member. Further, according to the present invention, in claim 7, the drive shaft has a tip end portion having a round bar shape inserted through the handle main body and attached, a holding portion having a polygonal cross section, and a coupling portion that is coupled to the mechanism portion. Then, the driving means is constituted by a bearing held in a receiving hole having a shape narrowed toward the inner bottom surface of the handle main body, and a flange portion is provided in this bearing to form a cut portion in the flange portion. The passive means is constituted by a clutch member held by a holding portion of the drive shaft, and the clutch member is formed in a cut portion formed in a flange portion of the bearing by elastic force of a coil spring supported by a coil spring retainer. ,
The inclined projection formed on the clutch member side is intermeshed, the notch in the bearing has a vertical portion and a gentle slope, and the inclined protrusion of the clutch member is a gentle slope of the notch. Having a slanted projection surface that abuts against, and a vertical surface portion,
When the handle main body is operated beyond the operating limit of the mechanical portion, the inclined projection surface of the clutch member rides over the gentle slope of the notch in the bearing, and the handle main body and the bearing idle with respect to the clutch member. Disclosed is a manual operation means having an overload releasing function in a bed or the like. Further, in the present invention, in claim 8, the driving means is constituted by a gear formed in the handle body, and the passive means is provided with a shaft which is inserted into the handle body and which is connected to a mechanical portion such as a bed and a shaft side. It is composed of the formed gear, and is pushed and meshed by the coil spring held by the cap.By operating the handle main body beyond the operation limit of the mechanical part, the gear inside the handle main body shifts the gear on the shaft side. Disclosed is a manual operation means which has an overload releasing function in a bed or the like which is overridden and the handle body is idled with respect to the shaft side.

【０００５】請求項１によれば、ハンドル本体を機構部
動作限界を越えて操作すると、原動手段と受動手段との
圧接力に抗して、ハンドル本体および原動手段を、受動
手段および駆動軸に対して空転させることができ、過大
負荷がベッド等の機構部側に伝達されることはない。According to the first aspect of the present invention, when the handle main body is operated beyond the operating limit of the mechanical section, the handle main body and the drive means are moved to the passive means and the drive shaft against the pressure contact force between the drive means and the passive means. In contrast, it can be idled, and an excessive load will not be transmitted to the mechanical part side such as the bed.

【０００６】請求項２によれば、ハンドル本体をベッド
等の機構部動作限界を越えて操作すると、板ばね部材に
おけるばね片先端側の屈曲部と軸受のフランジ部におけ
るギヤ部との間に、通常動作時にかかる負荷を越えた過
大負荷がかかる。これによって前記屈曲部がギヤ部を乗
り越えて、ハンドル本体および軸受を、駆動軸に対して
空転させることができ、過大負荷がベッド等の機構部側
に伝達されることはない。According to the second aspect of the present invention, when the handle body is operated beyond the operating limit of the mechanical portion such as the bed, between the bent portion on the tip end side of the spring piece of the leaf spring member and the gear portion of the flange portion of the bearing, An excessive load is applied that exceeds the load applied during normal operation. As a result, the bent portion can go over the gear portion, and the handle main body and the bearing can be made to idle with respect to the drive shaft, and an excessive load will not be transmitted to the mechanism portion side such as the bed.

【０００７】請求項３によれば、ハンドル本体をベッド
等の機構部動作限界を越えて操作すると、板ばね部材の
爪部とクラッチ部材の切込部における緩斜面部との間
に、通常動作時にかかる負荷を越えた過大負荷がかか
る。これによって、板ばね部材の爪部が前記クラッチ部
材の切込部における緩斜面部により、押し戻され、前記
板ばね部材とクラッチ部材と噛み合った状態が解除さ
れ、ハンドル本体と板ばね部材とが、駆動軸側に固定し
たクラッチ部材に対して空転する。According to the third aspect, when the handle main body is operated beyond the operating limit of the mechanical portion such as the bed, the normal operation is performed between the claw portion of the leaf spring member and the gentle slope portion of the cut portion of the clutch member. Excessive load that exceeds the load that is sometimes applied. Thereby, the claw portion of the leaf spring member is pushed back by the gentle slope portion in the cut portion of the clutch member, the state in which the leaf spring member and the clutch member are engaged with each other is released, and the handle body and the leaf spring member are The clutch member fixed on the drive shaft side idles.

【０００８】請求項４によれば、ハンドル本体を円周一
方向に回しすぎると、クラッチ部材の切込部の緩斜面部
に当接している、第１板ばね部材における爪部が、クラ
ッチ部材の第１板ばね部材との対向面の位置まで押し戻
され、これによって、クラッチ部材が、ハンドル本体と
共に、駆動軸側に固定した第１ばね部材に対し、空転す
る。一方、ハンドル本体を円周他方向に回しすぎると、
軸受のフランジ部における切込部の緩斜面部が、円周他
方向に移動することにより、第２板ばね部材の爪部が、
軸受のフランジ部と第２板ばね部材との対向面の位置ま
で押し戻され、これによって、軸受が、ハンドル本体と
共に、クラッチ部材によって駆動軸側に固定された第２
板ばね部材に対し、空転することとなる。According to the fourth aspect of the present invention, when the handle body is rotated too much in one direction around the circumference, the claw portion of the first leaf spring member, which is in contact with the gentle slope portion of the cut portion of the clutch member, causes the clutch member to move. The clutch member is pushed back to the position of the surface facing the first leaf spring member, whereby the clutch member, together with the handle body, idles with respect to the first spring member fixed to the drive shaft side. On the other hand, if you turn the handle body too far in the other direction,
By moving the gentle slope portion of the notch portion of the flange portion of the bearing in the other direction of the circumference, the claw portion of the second leaf spring member becomes
The bearing is pushed back to the position of the facing surface of the flange portion of the bearing and the second leaf spring member, whereby the bearing is fixed to the drive shaft side by the clutch member together with the handle body.
The leaf spring member will idle.

【０００９】請求項５によれば、クラッチ部材と第２板
ばね部材とを、駆動軸の断面丸棒状の先端部に保持した
外形多角形状のカラーによって連動回転させることがで
きる。According to the fifth aspect, the clutch member and the second leaf spring member can be interlockedly rotated by the outer polygonal collar held by the tip end of the drive shaft having a round bar cross section.

【００１０】請求項６によれば、何れの方向、ベッド等
の機構部の動作範囲以上にハンドル本体を回しても、過
大負荷によって、ばね部材側の三角歯が、軸受のフラン
ジ部の三角溝の内部斜面を伝って乗り越え、これによっ
てハンドル本体および軸受を空転させ、機構部側に負担
がかからないようにすることができる。According to the sixth aspect of the present invention, no matter which direction, the handle main body is rotated beyond the operating range of the mechanism portion such as the bed, the triangular tooth on the spring member side is caused to have a triangular groove on the flange portion of the bearing due to excessive load. It is possible to get over the inner slope of the vehicle and thereby to make the handle body and the bearing idle, so that the mechanism side is not burdened.

【００１１】請求項７によれば、ハンドル本体を限界以
上に回すことで、ハンドル本体側に取り付けた軸受も、
ハンドル本体に従って回転する。すると、軸受における
フランジ部端面の切込部が回転方向に移動するので、切
込部の緩斜面部が、クラッチ部材の傾斜突部を介して、
コイルばねの弾発力に抗して、クラッチ部材を押し戻
し、この状態で、ハンドル本体と軸受側が、機構部側に
連なる、駆動軸側に保持されたクラッチ部材に対し、空
転する。なお、コイルばねのばね定数により、空転する
トルクを調節することができ、機構部の動作負荷に合わ
せた使い方が可能である。According to the seventh aspect, the bearing mounted on the handle body side by turning the handle body beyond the limit,
Rotate according to the handle body. Then, since the cut portion of the flange end surface of the bearing moves in the rotation direction, the gentle slope portion of the cut portion, through the inclined projection of the clutch member,
The clutch member is pushed back against the elastic force of the coil spring, and in this state, the handle body and the bearing side run idle with respect to the clutch member held on the drive shaft side that is continuous with the mechanism portion side. The idling torque can be adjusted by the spring constant of the coil spring, and it can be used according to the operating load of the mechanism section.

【００１２】請求項８によれば、ハンドル本体を動作範
囲以上に回そうとすると、シャフト側のギヤと噛み合
う、ハンドル本体側のギヤが、コイルばねの弾発力に抗
して、シャフト側のギヤの山部を乗り越える。これによ
って、ハンドル本体が、機構部側に連なるシャフトに対
して空転し、過大負荷からハンドル本体や、機構部を保
護することができる。According to the eighth aspect, when the handle body is rotated beyond the operating range, the gear on the handle body side, which meshes with the gear on the shaft side, resists the elastic force of the coil spring and moves on the shaft side. Get over the mountain of gear. As a result, the handle body idles with respect to the shaft connected to the mechanism portion side, and the handle body and the mechanism portion can be protected from an excessive load.

【００１３】[0013]

【発明の実施の形態】次に、本発明にかかるベッド等に
おける過負荷解放機能を有する手動操作手段の実施の形
態の一例を挙げ、添付の図面を参照しながら以下説明す
る。図１に、過負荷解放機能を有する手動操作手段１を
示し、この手動操作手段１は、クランクハンドルであっ
て、駆動軸２と、駆動軸２を駆動軸２の軸方向に対して
直交する方向に固定してなるハンドル本体３とを有して
いる。BEST MODE FOR CARRYING OUT THE INVENTION Next, an example of an embodiment of a manual operation means having an overload releasing function in a bed or the like according to the present invention will be given and described below with reference to the accompanying drawings. FIG. 1 shows a manual operating means 1 having an overload releasing function. The manual operating means 1 is a crank handle, and the drive shaft 2 and the drive shaft 2 are orthogonal to the axial direction of the drive shaft 2. The handle main body 3 is fixed in the direction.

【００１４】前記駆動軸２は、作動すべきベッド等の機
構部と動力的に連結しており、前記ハンドル本体３内に
嵌入して取り付ける断面丸棒状の先端部２ａと、後述す
る過負荷解放機能を有する構成部品を保持する断面多角
形状の（六角形）保持部２ｂと、作動すべき機構部に結
合する結合部２ｃとを有し、前記先端部２ａを細径とし
て、順次径を段階的に拡大した加工としている。また、
前記先端部２ａには、後述する抜け止め部材を装着する
ための絞部ｓを設けている。The drive shaft 2 is motively connected to a mechanical portion such as a bed to be operated, and has a round rod-shaped tip portion 2a which is fitted and mounted in the handle body 3 and an overload release described later. It has a polygonal cross-section (hexagonal) holding part 2b for holding a functional component, and a connecting part 2c for connecting to a mechanism part to be operated. The tip part 2a has a small diameter, and the diameter is increased step by step. The processing has been expanded. Also,
The tip portion 2a is provided with a narrowed portion s for mounting a retaining member which will be described later.

【００１５】また前記ハンドル本体３は、回転半径を決
める細長形状のもので、一端寄りの内面に、前記駆動軸
２の先端部２ａを原動手段である軸受４を介して保持す
る円筒縁部５を形成している。この円筒縁部５は、ハン
ドル本体３内底面に向かって内径をテーパ状に絞り込ん
だ形状の受穴６を形成すると共に、この受穴６内側面
に、前記軸受４と歯合するための複数の溝部ｄを形成し
ている。また、前記円筒縁部５の受穴６底面に対応する
ハンドル本体３外側面に凹所７を形成し、前記受穴６か
ら凹所７に向けて駆動軸２の先端部２ａを挿通してな
る、挿通孔８を形成している。そして、駆動軸２の先端
部２ａを前記ハンドル本体３の挿通孔８に挿通した際
に、円筒縁部５の受穴６に対応する凹所７に、前記先端
部２ａの絞部ｓに抜け止め部材である、抜止ワッシャ９
を嵌め込むと共に、さらにこの抜止ワッシャ９外周に固
定ワッシャ１０，１０を嵌着するようにしている。な
お、前記ハンドル本体３の他端側には、ハンドル本体３
に折畳み／格納可能に設けたグリップ１１を有してい
る。The handle body 3 has an elongated shape that determines the radius of gyration, and has a cylindrical edge portion 5 for holding the tip portion 2a of the drive shaft 2 on an inner surface near one end via a bearing 4 which is a driving means. Is formed. The cylindrical edge portion 5 forms a receiving hole 6 having a tapered inner diameter toward the inner bottom surface of the handle body 3, and a plurality of inner surface portions of the receiving hole 6 for engaging with the bearing 4 are formed. To form a groove d. Further, a recess 7 is formed on the outer surface of the handle body 3 corresponding to the bottom surface of the receiving hole 6 of the cylindrical edge portion 5, and the tip 2a of the drive shaft 2 is inserted from the receiving hole 6 toward the recess 7. The insertion hole 8 is formed. When the tip portion 2a of the drive shaft 2 is inserted into the insertion hole 8 of the handle body 3, the drive shaft 2 is inserted into the recess 7 corresponding to the receiving hole 6 of the cylindrical edge portion 5 and is pulled out to the narrowed portion s of the tip portion 2a. A retaining washer 9 that is a retaining member
In addition to fitting, the fixed washers 10, 10 are further fitted around the retaining washer 9. In addition, the handle body 3 is provided on the other end side of the handle body 3.
It has a grip 11 that can be folded and stored.

【００１６】前記軸受４は、前記ハンドル本体３内にお
ける受穴６に嵌入して歯合させるようにした外面テーパ
形状の嵌入部４ａと、フランジ部４ｂとを有している。
すなわち、前記嵌入部４ａには、前記受穴６における溝
部ｄと歯合させるためのリブｒを形成している。なお、
かかる軸受４においても、中心軸に沿って、駆動軸２に
おける先端部２ａを挿通する通孔１２を有している。The bearing 4 has a fitting portion 4a having a tapered outer surface, which is fitted into the receiving hole 6 in the handle body 3 so as to be meshed, and a flange portion 4b.
That is, the fitting portion 4a is formed with a rib r for meshing with the groove portion d in the receiving hole 6. In addition,
The bearing 4 also has a through hole 12 along the central axis for inserting the tip 2a of the drive shaft 2.

【００１７】そして、前記駆動軸２における保持部２ｂ
には、過負荷解放手段として、受動手段である板ばね部
材１３とこの板ばね部材１３を押さえるばね押さえ部材
１４を装着し、前記板ばね部材１３は、前記軸受４のフ
ランジ部４ｂに形成したギヤ部１５と噛み合う状態で当
接させるようにしている。すなわち、前記板ばね部材１
３は、円盤状のばね部材を等角度（約１２０°）ごと円
周方向に指向するばね片１６，１６，１６に打ち抜き加
工し、これらばね片１６の先端側に、略くの字型に屈曲
加工した屈曲部１６ａを形成している。そして、三枚の
板ばね部材１３を、密接した状態で重ね合わせるように
している（図３参照）。The holding portion 2b of the drive shaft 2
A leaf spring member 13 which is a passive means and a spring holding member 14 which holds the leaf spring member 13 are mounted as the overload releasing means, and the leaf spring member 13 is formed on the flange portion 4b of the bearing 4. The gear portion 15 is brought into contact with the gear portion 15 in a meshed state. That is, the leaf spring member 1
3 is a disk-shaped spring member is punched into spring pieces 16, 16, 16 oriented in the circumferential direction at equal angles (about 120 °), and the tip end side of these spring pieces 16 has a substantially doglegged shape. A bent portion 16a that is bent is formed. Then, the three leaf spring members 13 are stacked in close contact with each other (see FIG. 3).

【００１８】また、これら板ばね部材１３と当接する前
記軸受４のフランジ部４ｂに形成したギヤ部１５は、フ
ランジ部４ｂ端面に亘って形成された、台形状の山部１
５ａ、谷部１５ｂよりなり、前記板ばね部材１３におけ
るばね片１６の屈曲部１６ａが前記ギヤ部１５における
一つの山部１５ａから谷部１５ｂにかけて係合してい
る。Further, the gear portion 15 formed on the flange portion 4b of the bearing 4 that abuts the leaf spring member 13 has a trapezoidal mountain portion 1 formed over the end surface of the flange portion 4b.
5a and a valley portion 15b, and the bent portion 16a of the spring piece 16 of the leaf spring member 13 is engaged from one peak portion 15a to the valley portion 15b of the gear portion 15.

【００１９】また、前記ばね押さえ部材１４は、駆動軸
２における保持部２ｂに装着された三枚の板ばね部材１
３を、前記軸受４のフランジ部４ｂにおけるギヤ部１５
に当接した状態を維持するように押し込むためのもの
で、スペーサ１７により保持部２ｂで保持されている。
なお、これら軸受４、板ばね部材１３およびばね押さえ
部材１４は、ハンドル本体３内に収まる構成としてい
る。The spring holding member 14 is composed of three leaf spring members 1 mounted on the holding portion 2b of the drive shaft 2.
3 is a gear portion 15 in the flange portion 4b of the bearing 4.
It is for pushing in so as to maintain the state of contacting with, and is held by the holding portion 2b by the spacer 17.
The bearing 4, the leaf spring member 13, and the spring pressing member 14 are configured to be housed in the handle body 3.

【００２０】以上のような構造の手動操作手段１におい
て、ベッド等の機構部の動作範囲内において、機構部を
動作させるときは、ハンドル本体３の他端側のグリップ
１１を引き出して握り、グリップ１１から、ハンドル本
体３一端寄りの円筒縁部５に装着した駆動軸２までの距
離を回転半径として、ハンドル本体３を回転させて、駆
動軸２から機構部に回転力を伝達させることができる。
このとき、ハンドル本体３を回転させることで、回転力
は軸受４からギヤ部１５を介し、板ばね部材１３、駆動
軸２における保持部２ｂ、結合部２ｃへと伝達されるわ
けであるが、機構部の動作範囲内においては、回転力は
所定の範囲内であるから、板ばね部材１３におけるばね
片１６の屈曲部１６ａが前記ギヤ部１５における一つの
山部１５ａから谷部１５ｂにかけての係合状態を維持
し、前記回転力をギヤ部１５から、板ばね部材１３、駆
動軸２における保持部２ｂ、結合部２ｃへと伝達し、機
構部を作動することができる（図３参照）。In the manual operation means 1 having the above-described structure, when operating the mechanical portion within the operating range of the mechanical portion such as a bed, the grip 11 on the other end side of the handle main body 3 is pulled out and gripped. The handle main body 3 is rotated by setting the distance from 11 to the drive shaft 2 mounted on the cylindrical edge portion 5 near the one end of the handle main body 3 as the radius of rotation, and the rotational force can be transmitted from the drive shaft 2 to the mechanism portion. .
At this time, by rotating the handle body 3, the rotational force is transmitted from the bearing 4 to the leaf spring member 13, the holding portion 2b of the drive shaft 2, and the coupling portion 2c via the gear portion 15. Since the rotational force is within a predetermined range within the operating range of the mechanism portion, the bent portion 16a of the spring piece 16 of the leaf spring member 13 extends from one peak portion 15a of the gear portion 15 to the valley portion 15b. The combined state can be maintained, and the rotational force can be transmitted from the gear portion 15 to the leaf spring member 13, the holding portion 2b of the drive shaft 2, and the coupling portion 2c to operate the mechanism portion (see FIG. 3).

【００２１】やがて、機構部が限界まで動作すると、前
記回転力を受けても機構部をそれ以上、動かすことはで
きず、操作者は機構部が限界まで動作したことを認識し
ていないと、操作者は続けてグリップ１１を回そうとす
る。このときの回転力は機構部の動作範囲内においての
回転力に比較して、増大することになる。When the mechanism unit eventually moves to the limit, the mechanism unit cannot be moved any more even if it receives the rotational force, and the operator must recognize that the mechanism unit has moved to the limit. The operator continuously tries to rotate the grip 11. The rotational force at this time increases as compared with the rotational force within the operating range of the mechanism section.

【００２２】すると、この過大な回転力は、軸受４から
ギヤ部１５の山部１５ａから谷部１５ｂにかけて係合し
た、板ばね部材１３におけるばね片１６の屈曲部１６ａ
が、山部１５ａから谷部１５ｂにかけての斜面により、
山部１５ａの位置まで押し上げ変形し（図４参照）、こ
の結果、ハンドル本体３及び軸受４のみを、駆動軸２の
先端部２ａを中心に、板ばね部材１３と動力的に断たれ
た状態で回転させることができるのである。これによっ
て、過大な負荷が機構部側に伝わることはなく、ハンド
ル本体３および機構部側の破損を防止することができ
る。Then, this excessive rotational force is applied to the bent portion 16a of the spring piece 16 of the leaf spring member 13 which is engaged from the bearing 4 to the peak portion 15a of the gear portion 15 to the valley portion 15b.
However, due to the slope from the mountain portion 15a to the valley portion 15b,
It is pushed up and deformed to the position of the mountain portion 15a (see FIG. 4), and as a result, only the handle body 3 and the bearing 4 are mechanically disconnected from the leaf spring member 13 around the tip portion 2a of the drive shaft 2. It can be rotated with. As a result, an excessive load will not be transmitted to the mechanism section side, and damage to the handle body 3 and the mechanism section side can be prevented.

【００２３】また本発明にかかるベッド等における過負
荷解放機能を有する手動操作手段は、以下のように実施
することもできる。なお、前述の手動操作手段１と実質
的に同構成体のものは、同符号を付している。すなわ
ち、図５、図６に示す手動操作手段１では、ベッド等の
機構部側と連結する駆動軸２と、駆動軸２に固設してな
る受動手段であるクラッチ部材２０と、前記駆動軸２の
丸軸部２１に回動可能に保持して、前記クラッチ部材２
０の切込部（後述）に歯合させてなる原動手段である板
ばね部材１３と、ハンドル本体３と、前記駆動軸２の丸
軸部２１先端側を、ハンドル本体３に抜けないように固
定する抜止ボルト２２とによって構成している。Further, the manual operation means having the overload releasing function in the bed or the like according to the present invention can be carried out as follows. Note that the same components as those of the above-mentioned manual operation means 1 are designated by the same reference numerals. That is, in the manual operation means 1 shown in FIGS. 5 and 6, the drive shaft 2 that is connected to the mechanical portion side such as the bed, the clutch member 20 that is a passive means fixed to the drive shaft 2, and the drive shaft. 2 is rotatably held by the round shaft portion 21 of the second clutch member 2
The leaf spring member 13, which is a driving means formed by meshing with a notch (described later) of 0, the handle main body 3, and the tip end side of the round shaft portion 21 of the drive shaft 2 are prevented from coming off to the handle main body 3. It is composed of a retaining bolt 22 for fixing.

【００２４】前記クラッチ部材２０は、前記駆動軸２に
固定した、円形状の外周を有するもので、例えば、焼結
体や、ダイキャスト部材によって構成することができ
る。かかるクラッチ部材２０の前記板ばね部材１３と対
向する側には、等角度毎に放射状に、複数の切込部２３
を形成している。これら切込部２３は、円周方向の一方
側を鉛直方向に切削した鉛直部２３ａと、他方側を緩斜
面状に切削した緩斜面部２３ｂとを有している。そし
て、前記板ばね部材１３は、前記クラッチ部材２０の切
込部２３に対応して、等角度毎、切り起こし形成した爪
部２４を有し、３枚重ね合わせた状態で、前記前記駆動
軸２における丸軸部２１に回動可能に保持するようにし
ている。前記爪部２４は、クラッチ部材２０の切込部２
３における緩斜面部２３ｂに係止した状態で、板ばね部
材１３がクラッチ部材２０と噛み合った状態でハンドル
本体３に組み込まれている（図７参照）。なお、これら
板ばね部材１３は、ハンドル本体３側に拘束した状態で
組み込まれている。The clutch member 20 is fixed to the drive shaft 2 and has a circular outer periphery, and can be made of, for example, a sintered body or a die cast member. On the side of the clutch member 20 facing the leaf spring member 13, a plurality of notches 23 are formed radially at equal angles.
Is formed. These notches 23 have a vertical portion 23a formed by cutting one side in the circumferential direction in the vertical direction, and a gentle slope portion 23b formed by cutting the other side in a gentle slope shape. The leaf spring member 13 has claw portions 24 formed by cutting and raising at equal angles corresponding to the cut portions 23 of the clutch member 20, and in the state where three sheets are stacked, the drive shaft is formed. The round shaft portion 21 in 2 is rotatably held. The claw portion 24 is the cutout portion 2 of the clutch member 20.
The leaf spring member 13 is assembled in the handle main body 3 in a state of being engaged with the clutch member 20 in a state of being locked to the gentle slope portion 23b in 3 (see FIG. 7). The leaf spring members 13 are incorporated in a state of being restrained on the handle body 3 side.

【００２５】上述のような構成によれば、駆動軸２と、
駆動軸２に固設してなるクラッチ部材２０と、クラッチ
部材２０の切込部２３に歯合させてなる板ばね部材１３
と、ハンドル本体３と、ハンドル本体３に抜けないよう
に固定する抜止ボルト２２と、部品点数を、図１に示す
手動操作手段１に比較して格段に少なくすることがで
き、従って組立て性も向上し、しかも製造コストを抑制
することが可能となる。According to the above structure, the drive shaft 2 and
A clutch member 20 fixed to the drive shaft 2 and a leaf spring member 13 meshed with a notch 23 of the clutch member 20.
The handle main body 3, the retaining bolt 22 for fixing the handle main body 3 so as not to come off, and the number of parts can be markedly reduced as compared with the manual operation means 1 shown in FIG. It is possible to improve the manufacturing cost and suppress the manufacturing cost.

【００２６】図７に示すように、機構部の動作範囲内
で、Ａ方向へ操作する時には、板ばね部材１３の爪部２
４が、クラッチ部材２０の切込部２３における緩斜面部
２３ｂに係止した状態で、操作力が駆動軸２へと伝達す
ることができる。そして、機構部の動作限界に達し、そ
のまま続けて回していくと、動作範囲内での操作力に比
較して操作力が増大するので、板ばね部材１３の爪部２
４が、クラッチ部材２０の切込部２３における緩斜面部
２３ｂを乗り越えて変形し、ハンドル本体３および板ば
ね部材１３が、駆動軸２における丸軸部２１を中心に空
転し、これによって、過大な回転力が機構部側に伝わる
ことはなく、ハンドル本体３および機構部側の破損を防
止することができる。As shown in FIG. 7, when operating in the direction A within the operating range of the mechanical portion, the claw portion 2 of the leaf spring member 13 is used.
The operation force can be transmitted to the drive shaft 2 in a state in which 4 is locked to the gentle slope portion 23 b of the cutout portion 23 of the clutch member 20. Then, when the operating limit of the mechanism portion is reached and the mechanism is continuously rotated, the operating force increases as compared with the operating force within the operating range.
4 passes over the gentle slope portion 23b of the notch 23 of the clutch member 20 and is deformed, and the handle body 3 and the leaf spring member 13 idle around the round shaft portion 21 of the drive shaft 2 and thereby become excessive. Since such a rotating force is not transmitted to the mechanism portion side, it is possible to prevent the handle body 3 and the mechanism portion side from being damaged.

【００２７】また、本発明におけるベッド等における過
負荷解放機能を有する手動操作手段１では、図８に示す
ように構成することもできる。この場合の手動操作手段
１は、双方向の過負荷解放機能を有するもので、駆動軸
２中間の断面六角形状の保持部２ｂに保持した、受動手
段である板ばね押さえ３０と、第１の板ばね部材３１
と、駆動軸２の断面丸棒状の先端部２ａ側に回動可能に
保持したクラッチ部材２０と、第２の板ばね部材３２
と、原動手段である軸受４とを有している。なお、軸受
４は、ハンドル本体３内における受穴６に嵌入部４ａを
嵌入して歯合させている。Further, the manual operation means 1 having an overload releasing function in a bed or the like according to the present invention can be constructed as shown in FIG. The manual operation means 1 in this case has a bidirectional overload release function, and is a leaf spring retainer 30 which is a passive means and is held by a holding portion 2b having a hexagonal cross section in the middle of the drive shaft 2, and a first Leaf spring member 31
A clutch member 20 rotatably held on the side of the distal end 2a of the drive shaft 2 having a round rod-shaped cross section; and a second leaf spring member 32.
And a bearing 4 which is a driving means. The bearing 4 has a fitting portion 4a fitted into a receiving hole 6 in the handle body 3 so as to mesh with each other.

【００２８】前記第１板ばね部材３１は、図中、先端を
円周Ｘ方向に向かう、爪部３１ａを所定角度毎形成して
いる。The first leaf spring member 31 has a claw portion 31a whose tip is directed in the circumferential X direction at predetermined angles.

【００２９】また、前記クラッチ部材２０の前記第１板
ばね部材３１と対向する面には、前記爪部３１ａが係止
するように切込部２３を設けている。この場合、切込部
２３の鉛直部２３ａは、円周Ｘ方向側にあり、緩斜面部
２３ｂは、円周Ｙ方向側に指向している。さらに、クラ
ッチ部材２０の第２板ばね部材３２側に面する側には、
クラッチ部材２０と第２板ばね部材３２とが一体的に回
動するための連結突部３３を突設している。Further, a notch 23 is provided on the surface of the clutch member 20 facing the first leaf spring member 31 so that the claw portion 31a is locked. In this case, the vertical portion 23a of the cut portion 23 is on the circumferential X direction side, and the gentle slope portion 23b is oriented on the circumferential Y direction side. Further, on the side of the clutch member 20 facing the second leaf spring member 32 side,
A coupling projection 33 for integrally rotating the clutch member 20 and the second plate spring member 32 is provided in a protruding manner.

【００３０】一方、前記第２板ばね部材３２は、前記第
１板ばね部材３１における爪部３１ａとは逆方向に、軸
受４に面する側に所定角度毎形成した爪部３２ａを有し
ている。On the other hand, the second plate spring member 32 has a claw portion 32a formed at a predetermined angle on the side facing the bearing 4 in the direction opposite to the claw portion 31a of the first plate spring member 31. There is.

【００３１】そして、前記軸受４のフランジ部４ｂに
は、第２板ばね部材３２の爪部３２ａに対応して、切込
部２３を形成している。この場合、切込部２３の鉛直部
２３ａは、前記クラッチ部材２０における切込部２３の
鉛直部２３ａとは逆の、円周Ｙ方向側にあり、緩斜面部
２３ｂは、円周Ｘ方向側に指向している。A notch 23 is formed in the flange 4b of the bearing 4 corresponding to the claw 32a of the second leaf spring member 32. In this case, the vertical portion 23a of the cut portion 23 is on the circumference Y direction side opposite to the vertical portion 23a of the cut portion 23 of the clutch member 20, and the gentle slope portion 23b is the circumference X direction side. Is oriented to.

【００３２】以上のような構造の手動操作手段１によれ
ば、円周Ｘ方向側、円周Ｙ方向側に、ハンドル本体３
を、機構部の動作範囲以上回すことによる過負荷を解放
し、駆動軸２における断面丸棒状の先端部２ａを中心に
空転し、これによって、過大な回転力が機構部側に伝わ
ることはなく、ハンドル本体３および機構部側の破損を
防止することができる。According to the manual operation means 1 having the above structure, the handle main body 3 is provided on the circumference X direction side and the circumference Y direction side.
Is released over the operating range of the mechanism section, and is idled around the tip 2a of the drive shaft 2 having a round rod-shaped cross section, whereby an excessive rotational force is not transmitted to the mechanism section side. It is possible to prevent damage to the handle body 3 and the mechanical portion side.

【００３３】例えば、ハンドル本体３を円周Ｘ方向に回
しすぎると、クラッチ部材２０が、ハンドル本体３と共
に軸受４、第２板ばね部材３２を介し回転しようとす
る。すると、クラッチ部材２０の切込部２３の緩斜面部
２３ｂが円周Ｘ方向に移動することにより、この緩斜面
部２３ｂに当接している、第１板ばね部材３１における
爪部３１ａが、クラッチ部材２０の第１板ばね部材３１
との対向面の位置まで押し戻され、これによって、クラ
ッチ部材２０が、ハンドル本体３と共に、駆動軸２側に
固定した第１ばね部材３１に対し、空転する。For example, when the handle body 3 is rotated too much in the circumferential X direction, the clutch member 20 tries to rotate together with the handle body 3 via the bearing 4 and the second leaf spring member 32. Then, the gentle slope portion 23b of the notch portion 23 of the clutch member 20 moves in the circumferential X direction, so that the claw portion 31a of the first leaf spring member 31, which is in contact with the gentle slope surface portion 23b, moves to the clutch. First leaf spring member 31 of member 20
The clutch member 20 is pushed back to the position of the surface opposite to the first spring member 31 fixed to the drive shaft 2 side together with the handle body 3.

【００３４】一方、ハンドル本体３を円周Ｙ方向に回し
すぎると、ハンドル本体３と共に軸受４が円周Ｙ方向に
回ろうとする。すると、軸受４のフランジ部４ｂにおけ
る切込部２３の緩斜面部２３ｂが、円周Ｙ方向に移動す
ることにより、第２板ばね部材３２の爪部３２ａが、軸
受４のフランジ部４ｂと第２板ばね部材３２との対向面
の位置まで押し戻され、これによって、軸受４が、ハン
ドル本体３と共に、クラッチ部材２０によって駆動軸２
側に固定された第２板ばね部材３２に対し、空転するこ
ととなる。On the other hand, if the handle body 3 is rotated too much in the circumferential Y direction, the bearing 4 tends to rotate in the circumferential Y direction together with the handle body 3. Then, the gentle slope portion 23b of the notch 23 in the flange portion 4b of the bearing 4 moves in the circumferential Y direction, so that the claw portion 32a of the second leaf spring member 32 and the flange portion 4b of the bearing 4 and the first portion. 2 is pushed back to the position of the surface facing the leaf spring member 32, whereby the bearing 4 together with the handle main body 3 is driven by the clutch member 20.
The second plate spring member 32 fixed to the side will idle.

【００３５】また、双方向のベッド等における過負荷解
放機能を有する手動操作手段１としては、図９、図１０
に示すように構成することもできる。この場合の手動操
作手段１は、基本的には、前述の手動操作手段１と同構
成であるが、クラッチ部材２０と第２板ばね部材３２と
を、駆動軸２の断面丸棒状の先端部２ａに保持した外形
六角形状のカラー４０によって連動回転させる構造とし
ている。なお、かかる手動操作手段１によっても、双方
向の過負荷を解放することができ、ハンドル本体３や、
ベッド等の機構部などの破損を防止することができる。Further, as the manual operation means 1 having an overload releasing function in a bidirectional bed or the like, FIG. 9 and FIG.
It can also be configured as shown in. The manual operating means 1 in this case basically has the same configuration as the manual operating means 1 described above, but the clutch member 20 and the second leaf spring member 32 are connected to each other by a distal end portion of the drive shaft 2 having a round bar cross section. The structure is such that the external hexagonal collar 40 held by 2a rotates in conjunction. The manual operation means 1 can also release the bidirectional overload, and the handle body 3 and
It is possible to prevent mechanical parts such as beds from being damaged.

【００３６】さらに、双方向のベッド等における過負荷
解放機能を有する手動操作手段１としては、図１１に示
すように構成することもできる。この場合の手動操作手
段１では、ハンドル本体３内における受穴６に保持した
原動手段である軸受４と、駆動軸２中間の断面六角形状
の保持部２ｂに保持した受動手段であるばね部材５０
と、ばね押さえ５１と、スペーサ５２とで実質的に構成
している。Further, the manual operation means 1 having an overload releasing function in a bidirectional bed or the like can be constructed as shown in FIG. In the manual operation means 1 in this case, the bearing 4 which is a driving means held in the receiving hole 6 in the handle body 3 and the spring member 50 which is a passive means held in the holding portion 2b having a hexagonal cross section in the middle of the drive shaft 2.
And a spring retainer 51 and a spacer 52.

【００３７】前記軸受４とばね部材５０とは、前記ばね
押さえ５１によって軸受４のフランジ部４ｂに形成した
三角溝５３と、ばね部材５０側に形成した、前記三角溝
５３に対応した三角歯５４と噛み合うことで当接してい
る。これら三角溝５３は、前記軸受４のフランジ部４ｂ
に、等角度（例えば１２０°）毎形成され、中心の最深
の形成深さに対してフランジ部４ｂ端面における形成幅
は、倍以上の寸法としている。また、三角溝５３の形成
断面形状は、中心の最深部から内部斜面が双方に等角度
拡開している（図１２参照）。The bearing 4 and the spring member 50 include a triangular groove 53 formed on the flange portion 4b of the bearing 4 by the spring retainer 51 and a triangular tooth 54 formed on the spring member 50 side and corresponding to the triangular groove 53. It abuts by engaging with. These triangular grooves 53 form the flange portion 4b of the bearing 4.
Further, it is formed at equal angles (for example, 120 °), and the formation width at the end face of the flange portion 4b is twice or more as large as the deepest formation depth at the center. Further, in the cross-sectional shape of the triangular groove 53, the inner slope extends from the deepest part at the center to both sides at an equal angle (see FIG. 12).

【００３８】前記ばね部材５０は、図１３に示すよう
に、中心に駆動軸２中間の断面六角形状の保持部２ｂに
嵌挿するための六角穴５０ａを有し、六角穴５０ａ周囲
に、通孔５０ｂ，５０ｂ，５０ｂが形成され、さらに通
孔５０ｂ外側に前記三角歯５４をそれぞれプレス加工し
て形成している。これら三角歯５４は、外形が前記三角
溝５３に、係合する形状としている。As shown in FIG. 13, the spring member 50 has a hexagonal hole 50a at the center for fitting and insertion into a holding portion 2b having a hexagonal cross-section in the middle of the drive shaft 2. Holes 50b, 50b, 50b are formed, and the triangular teeth 54 are formed on the outside of the through hole 50b by pressing. The outer shape of each of the triangular teeth 54 is a shape that engages with the triangular groove 53.

【００３９】以上のような構成の手動操作手段１におい
ても、何れの方向に、ベッド等の機構部の動作範囲以上
にハンドル本体３を回しても、過剰トルクによって、ば
ね部材５０側の三角歯５４が、軸受４のフランジ部４ｂ
の三角溝５３の内部斜面を伝ってフランジ部４ｂ端面に
もたらされ、これによってハンドル本体３および軸受４
を空転させ、機構部側に負担がかからないようにするこ
とができる。なお、前記手動操作手段１は、ハンドル本
体３内における受穴６に保持した軸受４と、ばね部材５
０と、ばね押さえ５１と、スペーサ５２とで構成したも
のであるので、構造が単純であり、部品点数も寄り少な
く、組立て工程を簡略化できて組立て性が向上し、製造
コストを抑えることができる。Even in the manual operation means 1 having the above-described structure, even if the handle body 3 is rotated in any direction beyond the operating range of the mechanical part such as the bed, the excessive torque causes the triangular teeth on the spring member 50 side. 54 is the flange portion 4b of the bearing 4.
It is brought to the end surface of the flange portion 4b along the inner slope of the triangular groove 53 of the handle body 3 and the bearing 4
Can be made to spin so that the mechanism side is not overloaded. The manual operation means 1 includes a bearing 4 held in a receiving hole 6 in the handle body 3 and a spring member 5.
0, the spring retainer 51, and the spacer 52, the structure is simple, the number of parts is small, the assembling process can be simplified, the assemblability is improved, and the manufacturing cost can be suppressed. it can.

【００４０】本発明におけるベッド等における過負荷解
放機能を有する手動操作手段１では、図１４、図１５に
示すように構成することもできる。この場合の手動操作
手段１では、板ばね部材１３の代わりに例えばコイルば
ねを用いている。なお、板ばね部材１３の代わりとして
他の付勢手段を用いることもできる。すなわち図に示す
ように、ハンドル本体３内における受穴６に保持した原
動手段である軸受４におけるフランジ部４ｂ端面に対
し、直接受動手段であるクラッチ部材２０を対向させ、
これをコイルばね押さえ６０によって支えられたコイル
ばね６１の弾発力によって、軸受４におけるフランジ部
４ｂ端面の切込部２３に、クラッチ部材２０側に形成し
た傾斜突部６２を噛み合わせる構成としている。このク
ラッチ部材２０の傾斜突部６２は、前記切込部２３に係
止する形状としている。すなわち、前記傾斜突部６２
は、切込部２３の緩斜面部２３ｂに当接する傾斜突面６
２ａと、鉛直面部６２ｂとを有している。The manual operation means 1 having an overload releasing function in a bed or the like according to the present invention can be configured as shown in FIGS. 14 and 15. In the manual operation means 1 in this case, for example, a coil spring is used instead of the leaf spring member 13. Other biasing means may be used instead of the leaf spring member 13. That is, as shown in the drawing, the clutch member 20 as the passive means is directly opposed to the end surface of the flange portion 4b of the bearing 4 as the driving means held in the receiving hole 6 in the handle body 3,
The elastic protrusion of the coil spring 61 supported by the coil spring retainer 60 engages the notch 23 of the end surface of the flange 4b of the bearing 4 with the inclined projection 62 formed on the clutch member 20 side. . The inclined projection 62 of the clutch member 20 is shaped so as to engage with the notch 23. That is, the inclined protrusion 62
Is the slanted projecting surface 6 that comes into contact with the gentle slanted surface portion 23b of the cut portion 23.
It has 2a and the vertical surface part 62b.

【００４１】以上のような構造の手動操作手段１によれ
ば、ハンドル本体３を限界以上に回すことで、ハンドル
本体３側に取り付けた軸受４も、ハンドル本体３に従っ
て回転する。すると、軸受４におけるフランジ部４ｂ端
面の切込部２３が回転方向に移動するので、切込部２３
の緩斜面部２３ｂが、クラッチ部材２０の傾斜突部６２
を介して、コイルばね６１の弾発力に抗して、クラッチ
部材２０を押し戻し、この状態で、ハンドル本体３と軸
受４側が、機構部側に連なる、駆動軸２側に保持された
クラッチ部材２０に対し、空転するのである。なお、コ
イルばね６１のばね定数により、空転させるためのトル
クを調節することができ、機構部の動作負荷に合わせた
使い方が可能である。According to the manual operation means 1 having the above structure, when the handle body 3 is rotated beyond the limit, the bearing 4 attached to the handle body 3 side also rotates in accordance with the handle body 3. Then, the cut portion 23 on the end surface of the flange portion 4b of the bearing 4 moves in the rotation direction, so that the cut portion 23
Of the slanted surface portion 23 b of the clutch member 20.
The clutch member 20 is pushed back against the elastic force of the coil spring 61 via the clutch member 20. In this state, the handle body 3 and the bearing 4 side are connected to the mechanism portion side, and are held on the drive shaft 2 side. It turns idle for 20. The torque for idling can be adjusted by the spring constant of the coil spring 61, so that the coil spring 61 can be used according to the operating load of the mechanism section.

【００４２】さらに、コイルばね方式の手動操作手段１
は、図１６に示すように構成することもできる。この場
合の手動操作手段１では、ハンドル本体３に、ベッド等
の機構部に連なるシャフト７０を挿通し、原動手段とし
てのハンドル本体３内に形成したギヤ（図示省略）と、
受動手段としてのシャフト７０側のギヤ（後述）とを、
キャップ７１によって保持されたコイルばね６１によっ
て噛み合わせている。Further, the coil spring type manual operating means 1 is used.
Can also be configured as shown in FIG. In the manual operation means 1 in this case, a shaft (70) connected to a mechanical part such as a bed is inserted into the handle body 3 and a gear (not shown) formed in the handle body 3 as a driving means,
And a gear (described later) on the shaft 70 side as a passive means,
The coil springs 61 held by the cap 71 mesh with each other.

【００４３】前記シャフト７０は、末端側に円形頭部７
２を固定しており、この円形頭部７２に前記コイルばね
６１を当接させている。また、前記円形頭部７２は、シ
ャフト７０先端側方向に起曲した縁部７２ａを有し、こ
の縁部７２ａに、ハンドル本体３内に形成したギヤと噛
み合う、ギヤ７３を形成している。このギヤ７３は、三
角形状で、山部を形成する角度が鈍角で高さを抑えた形
状としている。The shaft 70 has a circular head 7 on the distal side.
2 is fixed, and the coil head 61 is brought into contact with the circular head 72. Further, the circular head portion 72 has an edge portion 72a which is bent toward the tip end side of the shaft 70, and a gear 73 which meshes with a gear formed in the handle body 3 is formed on the edge portion 72a. The gear 73 has a triangular shape, and an angle forming a mountain portion is an obtuse angle and its height is suppressed.

【００４４】以上のような手動操作手段１によれば、ハ
ンドル本体３を動作範囲以上に回そうとすると、シャフ
ト７０における円形頭部７２のギヤ７３と噛み合う、ハ
ンドル本体３側のギヤが、コイルばね６１の弾発力に抗
して、シャフト７０側のギヤ７３の山部を乗り越える。
これによって、ハンドル本体３が、機構部側に連なるシ
ャフト７０に対して、空転することとなり、過負荷から
ハンドル本体３や、機構部を保護することができる。According to the manual operation means 1 as described above, when the handle main body 3 is rotated beyond the operating range, the gear on the handle main body 3 side that meshes with the gear 73 of the circular head 72 of the shaft 70 becomes the coil. It goes over the mountain portion of the gear 73 on the shaft 70 side against the elastic force of the spring 61.
As a result, the handle body 3 idles with respect to the shaft 70 connected to the mechanism portion side, and the handle body 3 and the mechanism portion can be protected from overload.

【００４５】[0045]

【発明の効果】本発明によれば、ベッド等の機構部の動
作範囲を越えて、駆動力を与えた場合でも、機構部の破
損を生ずることはない。また、部品点数が少なく構造は
単純であるので、組立て性はよく、製造コストを抑制す
ることができる。According to the present invention, even if a driving force is applied beyond the operating range of the mechanical portion such as a bed, the mechanical portion will not be damaged. Further, since the number of parts is small and the structure is simple, the assembling property is good and the manufacturing cost can be suppressed.

【００４６】[0046]

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明にかかるベッド等における過負荷解放機
能を有する手動操作手段の一つの実施の形態を示す、要
部断面説明図である。FIG. 1 is a cross-sectional explanatory view of essential parts showing one embodiment of a manual operating means having an overload releasing function in a bed or the like according to the present invention.

【図２】図１に示す手動操作手段の分解斜視説明図であ
る。FIG. 2 is an exploded perspective view showing the manual operation means shown in FIG.

【図３】図１に示す手動操作手段における過負荷解放手
段を示す、要部側面図である。FIG. 3 is a side view of essential parts showing an overload releasing means in the manual operating means shown in FIG.

【図４】図３に示す過負荷解放手段の作用を説明する要
部側面図である。FIG. 4 is a side view of an essential part for explaining the operation of the overload releasing means shown in FIG.

【図５】本発明にかかるベッド等における過負荷解放機
能を有する手動操作手段の別の実施の形態を示す、省略
的な要部分解斜視図である。FIG. 5 is an abbreviated main part exploded perspective view showing another embodiment of a manual operation means having an overload releasing function in a bed or the like according to the present invention.

【図６】図５に示す手動操作手段の分解斜視図である。FIG. 6 is an exploded perspective view of the manual operation means shown in FIG.

【図７】図５に示す手動操作手段における過負荷解放手
段を示す、要部側面図である。FIG. 7 is a side view of essential parts showing an overload releasing means in the manual operating means shown in FIG.

【図８】本発明にかかるベッド等における過負荷解放機
能を有する手動操作手段の別の実施の形態を示す、分解
構成説明図である。FIG. 8 is an exploded configuration explanatory view showing another embodiment of a manual operation means having an overload releasing function in a bed or the like according to the present invention.

【図９】本発明にかかるベッド等における過負荷解放機
能を有する手動操作手段の別の実施の形態を示す、要部
断面説明図である。FIG. 9 is a cross-sectional explanatory view of essential parts showing another embodiment of a manual operating means having an overload releasing function in a bed or the like according to the present invention.

【図１０】図９に示す手動操作手段の、分解構成説明図
である。10 is an exploded view of the manual operation means shown in FIG.

【図１１】本発明にかかるベッド等における過負荷解放
機能を有する手動操作手段の別の実施の形態を示す、要
部断面説明図である。FIG. 11 is a cross-sectional explanatory view of essential parts showing another embodiment of a manual operation means having an overload releasing function in a bed or the like according to the present invention.

【図１２】図１１に示す手動操作手段における軸受の断
面説明図である。12 is a cross-sectional explanatory view of a bearing in the manual operation means shown in FIG.

【図１３】図１１に示す手動操作手段におけるばね部材
の平面図である。13 is a plan view of a spring member in the manual operation means shown in FIG.

【図１４】本発明にかかるベッド等における過負荷解放
機能を有する手動操作手段の別の実施の形態を示す、省
略的な要部分解斜視図である。FIG. 14 is an abbreviated main part exploded perspective view showing another embodiment of a manual operation means having an overload releasing function in a bed or the like according to the present invention.

【図１５】図１４に示す手動操作手段の、分解構成説明
図である。15 is an exploded view of the manual operation means shown in FIG.

【図１６】本発明にかかるベッド等における過負荷解放
機能を有する手動操作手段の別の実施の形態を示す、要
部断面図である。FIG. 16 is a cross-sectional view of essential parts showing another embodiment of a manual operating means having an overload releasing function in a bed or the like according to the present invention.

【図１７】図１６に示す手動操作手段における過負荷解
放手段の拡大断面図である。17 is an enlarged cross-sectional view of the overload releasing means in the manual operating means shown in FIG.

【図１８】図１６に示す手動操作手段の分解斜視説明図
である。FIG. 18 is an exploded perspective view of the manual operating means shown in FIG.

【符号の説明】[Explanation of symbols]

１手動操作手段２駆動軸２ａ先端部２ｂ保持部２ｃ結合部３ハンドル本体４軸受４ａ嵌入部４ｂフランジ部５円筒縁部６受穴７凹所８挿通孔９抜止ワッシャ１０固定ワッシャ１１グリップ１２通孔１３板ばね部材１４ばね押さえ部材１５ギヤ部１５ａ山部１５ｂ谷部１６ばね片１６ａ屈曲部１７スペーサ２０クラッチ部材２１丸軸部２２抜止ボルト２３切込部２３ａ鉛直部２３ｂ緩斜面部２４爪部３０板ばね押さえ３１第１板ばね部材３１ａ爪部３２第２板ばね部材３２ａ爪部３３連結突部４０カラー５０ばね部材５０ａ六角穴５０ｂ通孔５１ばね押さえ５２スペーサ５３三角溝５４三角歯６０コイルばね押さえ６１コイルばね６２傾斜突部６２ａ傾斜突面６２ｂ鉛直面部７０シャフト７１キャップ７２円形頭部７２ａ縁部７３ギヤ 1 Manual operation means 2 drive shaft 2a tip 2b holding part 2c joint 3 handle body 4 bearings 4a Fitting part 4b Flange part 5 Cylindrical edge 6 receiving holes 7 recess 8 insertion holes 9 Locking washer 10 fixed washer 11 grip 12 through holes 13 Leaf spring members 14 Spring retainer 15 Gear part 15a Yamabe 15b Tanibe 16 spring pieces 16a bent portion 17 Spacer 20 Clutch member 21 Round shaft 22 Captive bolt 23 Notch 23a Vertical part 23b gentle slope 24 nails 30 leaf spring retainer 31 First Leaf Spring Member 31a Claw 32 Second leaf spring member 32a claw 33 Connection protrusion 40 colors 50 Spring member 50a hexagon hole 50b through hole 51 Spring retainer 52 Spacer 53 triangular groove 54 triangular teeth 60 coil spring holder 61 coil spring 62 Inclined protrusion 62a inclined projecting surface 62b Vertical section 70 shaft 71 cap 72 circular head 72a edge 73 gears

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.⁷ 識別記号ＦＩテーマコート゛(参考）Ｆ１６Ｆ 1/18 Ｆ１６Ｆ 1/18 ＺＧ０５Ｇ 1/08 Ｇ０５Ｇ 1/08 Ａ ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F16F 1/18 F16F 1/18 Z G05G 1/08 G05G 1/08 A

Claims

【特許請求の範囲】[Claims]

【請求項１】作動すべきベッド等の機構部に連結す
る駆動軸と、駆動軸を回動操作してなるハンドル本体と
を有し、前記ハンドル本体は、一端寄りの内面に、前記
駆動軸を過負荷解放機構を介して保持すると共に、他端
寄りにハンドル本体を回動操作する握部とを有し、前記
過負荷解放機構は、前記ハンドル本体側に保持してなる
原動手段と駆動軸側に保持してなる受動手段とを有し、
前記原動手段と受動手段とは、圧接手段により駆動軸回
転方向を含む面に対して傾斜した角度で、圧接した構成
とし、前記ハンドル本体を機構部動作限界を越えて操作
することで、前記原動手段と受動手段との圧接力に抗し
て、ハンドル本体および原動手段を、受動手段および駆
動軸に対して空転させてなることを特徴とするベッド等
における過負荷解放機能を有する手動操作手段。1. A drive shaft connected to a mechanism such as a bed to be operated, and a handle main body formed by rotating the drive shaft, wherein the handle main body has an inner surface near one end of the drive shaft. And a grip for rotating the handle body toward the other end, and the overload releasing mechanism is driven by a driving means held on the handle body side. It has a passive means held on the shaft side,
The driving means and the passive means are configured to be in pressure contact with each other at an angle inclined with respect to the surface including the rotation direction of the drive shaft by the pressure contact means, and by operating the handle main body beyond the operation limit of the mechanical portion, A manual operation means having an overload releasing function in a bed or the like, characterized in that the handle main body and the driving means are made to idle with respect to the passive means and the drive shaft against the pressure contact force between the means and the passive means.

【請求項２】前記駆動軸は、前記ハンドル本体に挿
通して取り付ける断面丸棒状の先端部と、断面多角形状
の保持部と、前記機構部に結合する結合部とを有し、前
記原動手段は、ハンドル本体内底面に向かって絞り込ん
でなる形状の受穴に保持してなる軸受によって構成し、
この軸受にフランジ部を設けてフランジ部にギヤ部を形
成し、前記受動手段は、駆動軸における保持部に保持し
てなる板ばね部材によって構成して、この板ばね部材の
円周方向に指向する複数のばね片を形成すると共に、こ
れらばね片の先端側に屈曲部を形成して、前記軸受のフ
ランジ部におけるギヤ部に前記板ばね部材の屈曲部を歯
合させるようにし、前記ハンドル本体を機構部動作限界
を越えて操作することで、前記板ばね部材における屈曲
部が前記軸受のフランジ部におけるギヤ部を乗り越え
て、ハンドル本体および軸受を、駆動軸に対して空転さ
せてなることを特徴とする請求項１記載のベッド等にお
ける過負荷解放機能を有する手動操作手段。2. The drive shaft includes a distal end portion having a round bar shape in cross section and attached to the handle body, a holding section having a polygonal cross section, and a coupling section that is coupled to the mechanism section. Consists of a bearing held in a receiving hole that is narrowed down toward the bottom of the handle body,
The bearing is provided with a flange portion to form a gear portion on the flange portion, and the passive means is constituted by a leaf spring member held by a holding portion on the drive shaft, and is oriented in the circumferential direction of the leaf spring member. Forming a plurality of spring pieces, and forming bent portions on the tip side of these spring pieces so that the bent portion of the leaf spring member meshes with the gear portion of the flange portion of the bearing, Is operated beyond the operating limit of the mechanical portion, the bent portion of the leaf spring member rides over the gear portion of the flange portion of the bearing, and the handle body and the bearing are idled with respect to the drive shaft. A manual operation means having an overload releasing function in a bed or the like according to claim 1.

【請求項３】前記駆動軸は、前記ハンドル本体に挿
通して取り付ける断面丸棒状の先端部と、前記機構部に
結合する結合部とを有し、前記原動手段は、前記駆動軸
の先端部に回動可能に保持すると共に、ハンドル本体側
に固定してなる板ばね部材によって構成し、前記受動手
段は前記駆動軸に固設してなるクラッチ部材によって構
成し、前記板ばね部材に、爪部を切り起こし形成する一
方、前記クラッチ部材に、前記板ばね部材の爪部に対向
して切込部を形成し、板ばね部材における爪部を、前記
クラッチ部材の切込部に係止した状態で、前記板ばね部
材とクラッチ部材とをハンドル本体に組み込んでなり、
前記ハンドル本体を機構部動作限界を越えて操作するこ
とで、前記板ばね部材における爪部が前記クラッチ部材
の切込部を乗り越えて、ハンドル本体および板ばね部材
を、クラッチ部材に対して空転させてなることを特徴と
する請求項１記載のベッド等における過負荷解放機能を
有する手動操作手段。3. The drive shaft includes a distal end portion having a round bar shape in cross section which is inserted into and attached to the handle main body, and a coupling portion which is coupled to the mechanism portion, and the driving means is a distal end portion of the drive shaft. And a pawl member fixed to the handle body side, and the passive means is a clutch member fixed to the drive shaft. On the other hand, a cut portion is formed in the clutch member so as to face the claw portion of the leaf spring member, and the claw portion of the leaf spring member is locked to the cut portion of the clutch member. In this state, the leaf spring member and the clutch member are incorporated into the handle body,
By operating the handle body beyond the operating limit of the mechanical portion, the claw portion of the leaf spring member rides over the notch of the clutch member, and the handle body and the leaf spring member idle with respect to the clutch member. A manual operation means having an overload releasing function in a bed or the like according to claim 1, wherein

【請求項４】前記駆動軸は、前記ハンドル本体に挿
通して取り付ける断面丸棒状の先端部と、断面多角形状
の保持部と、前記機構部に結合する結合部とを有し、前
記原動手段はハンドル本体内においてハンドル本体側に
保持してなる軸受によって構成し、前記受動手段は、前
記駆動軸における断面多角形状の保持部に保持した、板
ばね押さえと第１の板ばね部材と、前記駆動軸の先端部
側に回動可能に保持したクラッチ部材と、第２の板ばね
部材とによって構成し、前記第１板ばね部材は、先端を
前記クラッチ部材側に突出させると共に円周一方向に指
向させてなる爪部を有し、前記クラッチ部材の第１板ば
ね部材と対向する面に、前記爪部が係止すべき切込部を
有し、この切込部は、円周一方向側に位置する鉛直部
と、円周他方向側に指向する緩斜面部とを有し、前記ク
ラッチ部材の第２板ばね部材側に対向する側に、クラッ
チ部材と共に第２板ばね部材を連動回動するための連結
突部を有し、前記第２板ばね部材は、前記第１板ばね部
材における爪部とは逆方向に、且つ軸受に対向する側に
突出形成した爪部を有し、前記軸受の第２板ばね部材に
対向する側に、第２板ばね部材の爪部に対応して形成し
た切込部を有し、この切込部は、円周他方向側に位置す
る鉛直部と、円周一方向側に指向する緩斜面部とを有
し、前記ハンドル本体を円周一方向側に機構部動作限界
を越えて操作することで、第１板ばね部材における爪部
がクラッチ部材における切込部の緩斜面部を乗り越え
て、ハンドル本体、軸受、第２板ばね部材およびクラッ
チ部材を、第１板ばね部材に対して空転させ、前記ハン
ドル本体を円周他方向側に機構部動作限界を越えて操作
することで、第２板ばね部材における爪部が、軸受にお
ける切込部の緩斜面部を乗り越えて、ハンドル本体およ
び軸受を、第２板ばね部材に対して空転させてなること
を特徴とする請求項１記載のベッド等における過負荷解
放機能を有する手動操作手段。4. The drive shaft includes a distal end portion having a round bar shape in cross section which is inserted into and attached to the handle body, a holding section having a polygonal cross section, and a coupling section which is coupled to the mechanism section. Is a bearing held on the handle body side in the handle body, and the passive means is a leaf spring retainer and a first leaf spring member held by a holding portion of the drive shaft having a polygonal cross-section. The drive shaft is composed of a clutch member rotatably held on the tip end side and a second leaf spring member, and the first leaf spring member has its tip protruding toward the clutch member side and in one circumferential direction. There is a directed claw portion, and on the surface of the clutch member facing the first leaf spring member, there is a cut portion to which the claw portion should be locked. The cut portion has a circumferential one direction side. Oriented to the vertical part located at And a coupling projection for rotating the second plate spring member together with the clutch member on the side of the clutch member facing the second plate spring member side. The leaf spring member has a claw portion projecting in a direction opposite to the claw portion of the first leaf spring member and on the side facing the bearing, and on the side of the bearing facing the second leaf spring member. The second leaf spring member has a cut portion formed corresponding to the claw portion, and the cut portion has a vertical portion located on the other side of the circumference and a gentle slope portion oriented on one side of the circumference. When the handle body is operated in the one direction of the circumference beyond the operation limit of the mechanical portion, the claw portion of the first leaf spring member rides over the gentle slope of the cut portion of the clutch member, and the handle body , The bearing, the second leaf spring member and the clutch member idle with respect to the first leaf spring member, When the handle main body is operated in the other direction of the circumference beyond the operation limit of the mechanical portion, the claw portion of the second leaf spring member passes over the gentle slope portion of the notch of the bearing, and the handle main body and the bearing are moved. The manual operation means having an overload releasing function in a bed or the like according to claim 1, wherein the second leaf spring member is idled.

【請求項５】前記駆動軸は、前記ハンドル本体に挿
通して取り付ける断面丸棒状の先端部と、断面多角形状
の保持部と、前記機構部に結合する結合部とを有し、前
記原動手段はハンドル本体内においてハンドル本体側に
保持してなる軸受によって構成し、前記受動手段は、前
記駆動軸における断面多角形状の保持部に保持した、板
ばね押さえと第１の板ばね部材と、前記駆動軸の先端部
側に回動可能に保持したクラッチ部材と、第２の板ばね
部材とによって構成し、前記第１板ばね部材は、先端を
前記クラッチ部材側に突出させると共に円周一方向に指
向させてなる爪部を有し、前記クラッチ部材の第１板ば
ね部材と対向する面に、前記爪部が係止すべき切込部を
有し、この切込部は、円周一方向側に位置する鉛直部
と、円周他方向側に指向する緩斜面部とを有し、前記ク
ラッチ部材と第２板ばね部材とを、駆動軸の先端部に保
持した外形多角形状のカラーによって連動回転させる構
造とし、前記第２板ばね部材は、前記第１板ばね部材に
おける爪部とは逆方向に、且つ軸受に対向する側に突出
形成した爪部を有し、前記軸受の第２板ばね部材に対向
する側に、第２板ばね部材の爪部に対応して形成した切
込部を有し、この切込部は、円周他方向側に位置する鉛
直部と、円周一方向側に指向する緩斜面部とを有し、前
記ハンドル本体を円周一方向側に機構部動作限界を越え
て操作することで、第１板ばね部材における爪部がクラ
ッチ部材における切込部の緩斜面部を乗り越えて、ハン
ドル本体、軸受、第２板ばね部材およびクラッチ部材
を、第１板ばね部材に対して空転させ、前記ハンドル本
体を円周他方向側に機構部動作限界を越えて操作するこ
とで、第２板ばね部材における爪部が、軸受における切
込部の緩斜面部を乗り越えて、ハンドル本体および軸受
を、第２板ばね部材に対して空転させてなることを特徴
とする請求項１記載のベッド等における過負荷解放機能
を有する手動操作手段。5. The drive shaft includes a distal end portion having a round bar shape in cross section that is inserted into and attached to the handle body, a holding section having a polygonal cross section, and a coupling section that is coupled to the mechanism section. Is a bearing held on the handle body side in the handle body, and the passive means is a leaf spring retainer and a first leaf spring member held by a holding portion of the drive shaft having a polygonal cross-section. The drive shaft is composed of a clutch member rotatably held on the tip end side and a second leaf spring member, and the first leaf spring member has its tip protruding toward the clutch member side and in one circumferential direction. There is a directed claw portion, and on the surface of the clutch member facing the first leaf spring member, there is a cut portion to which the claw portion should be locked. The cut portion has a circumferential one direction side. Oriented to the vertical part located at And a second slanting surface portion for rotating the clutch member and the second leaf spring member in an interlocking manner with a collar having an outer polygonal shape held at the tip of the drive shaft. The first leaf spring member has a claw portion projecting in a direction opposite to the claw portion and on the side facing the bearing, and on the side of the bearing facing the second leaf spring member, the second leaf spring member The handle has a cut portion formed corresponding to the claw portion, and the cut portion has a vertical portion located on the other side of the circumference and a gentle slope portion directed to the one direction of the circumference. By operating the main body in one direction of the circumference beyond the operating limit of the mechanical portion, the claw portion of the first plate spring member passes over the gentle slope portion of the cut portion of the clutch member, and the handle main body, the bearing, and the second plate. The spring member and the clutch member are idled with respect to the first leaf spring member, and By operating the handle body in the other direction of the circumference beyond the operating limit of the mechanism portion, the claw portion of the second leaf spring member passes over the gentle slope portion of the notch portion of the bearing, and the handle body and the bearing are The manual operation means having an overload releasing function in a bed or the like according to claim 1, wherein the manual operation means is made to idle with respect to the second leaf spring member.

【請求項６】前記駆動軸は、前記ハンドル本体に挿
通して取り付ける断面丸棒状の先端部と、断面多角形状
の保持部と、前記機構部に結合する結合部とを有し、前
記原動手段は、ハンドル本体内底面に向かって絞り込ん
でなる形状の受穴に保持してなる軸受によって構成し、
この軸受にフランジ部を設けてフランジ部にギヤ部を形
成し、前記受動手段は、前記駆動軸における保持部に保
持したばね部材と、ばね押さえと、スペーサとによって
構成し、前記軸受のばね部材との対向面に、中心の最深
部から内部斜面が双方に等角度拡開する断面三角溝を形
成し、ばね部材側に断面三角歯を形成して、軸受の三角
溝とばね部材の三角歯を歯合させ、前記ばね部材は、中
心に駆動軸の保持部に嵌挿するための多角穴を有し、前
記ハンドル本体を円周双方向に機構部動作限界を越えて
操作することで、ばね部材側の三角歯が軸受の三角溝側
の内部斜面を乗り越えて、ハンドル本体および軸受を、
ばね部材に対して空転させてなることを特徴とする請求
項１記載のベッド等における過負荷解放機能を有する手
動操作手段。6. The drive shaft includes a distal end portion having a round bar shape in cross section which is inserted into and attached to the handle body, a holding section having a polygonal cross section, and a coupling section which is coupled to the mechanism section. Consists of a bearing held in a receiving hole that is narrowed down toward the bottom of the handle body,
A flange portion is provided on the bearing to form a gear portion on the flange portion, and the passive means is constituted by a spring member held by a holding portion of the drive shaft, a spring retainer, and a spacer. On the surface facing the and, the triangular groove of the cross section is formed so that the inner slope extends from both the deepest part of the center to both sides at the same angle, and the triangular tooth of the cross section is formed on the spring member side. And the spring member has a polygonal hole at the center for fitting into the holding portion of the drive shaft, and the handle main body is operated bidirectionally in the circumferential direction beyond the operating limit of the mechanical section, Triangular teeth on the spring member ride over the internal slope on the triangular groove side of the bearing,
The manual operation means having an overload releasing function in a bed or the like according to claim 1, wherein the manual operation means is made to idle with respect to the spring member.

【請求項７】前記駆動軸は、前記ハンドル本体に挿
通して取り付ける断面丸棒状の先端部と、断面多角形状
の保持部と、前記機構部に結合する結合部とを有し、前
記原動手段は、ハンドル本体内底面に向かって絞り込ん
でなる形状の受穴に保持してなる軸受によって構成し、
この軸受にフランジ部を設けてフランジ部に切込部を形
成し、前記受動手段は、前記駆動軸における保持部に保
持してなるクラッチ部材によって構成し、このクラッチ
部材はコイルばね押さえによって支持したコイルばねの
弾発力によって、軸受におけるフランジ部に形成した切
込部に、クラッチ部材側に形成した傾斜突部を噛み合わ
せる構成とし、前記軸受における切込み部は、鉛直部と
緩斜面部とを有し、前記クラッチ部材の傾斜突部は、前
記切込部の緩斜面部に当接する傾斜突面と、鉛直面部と
を有し、前記ハンドル本体を機構部動作限界を越えて操
作することで、前記クラッチ部材の傾斜突面が前記軸受
における切込部の緩斜面部を乗り越えて、ハンドル本体
および軸受を、クラッチ部材に対して空転させてなるこ
とを特徴とする請求項１記載のベッド等における過負荷
解放機能を有する手動操作手段。7. The drive shaft includes a distal end portion having a round bar shape in cross section which is inserted into and attached to the handle body, a holding section having a polygonal cross section, and a coupling section which is coupled to the mechanism section. Consists of a bearing held in a receiving hole that is narrowed down toward the bottom of the handle body,
The bearing is provided with a flange portion to form a notch in the flange portion, and the passive means is constituted by a clutch member held by a holding portion of the drive shaft, and the clutch member is supported by a coil spring retainer. Due to the elastic force of the coil spring, the inclined projection formed on the clutch member side is engaged with the notch formed on the flange portion of the bearing, and the notch of the bearing has a vertical portion and a gentle slope portion. The inclined projection of the clutch member has an inclined projection that comes into contact with the gentle slope of the notch and a vertical surface, and the handle main body is operated beyond the mechanical operation limit. And a handle body and a bearing that are idled with respect to the clutch member, with the inclined projecting surface of the clutch member riding over a gentle slope portion of a notch in the bearing. Manual actuating means with an overload release function in bed or the like of claim 1, wherein.

【請求項８】前記原動手段は前記ハンドル本体内に
形成したギヤによって構成し、前記受動手段は、ハンド
ル本体に挿通した、ベッド等の機構部に連なるシャフト
と、シャフト側に形成したギヤとによって構成して、キ
ャップによって保持したコイルばねによって押し込み噛
み合わせるようにし、前記ハンドル本体を機構部動作限
界を越えて操作することで、ハンドル本体内のギヤが、
シャフト側のギヤを乗り越えて、ハンドル本体をシャフ
ト側に対し、空転させてなることを特徴とする請求項１
記載のベッド等における過負荷解放機能を有する手動操
作手段。8. The drive means is composed of a gear formed in the handle body, and the passive means is composed of a shaft inserted into the handle body and connected to a mechanical part such as a bed, and a gear formed on the shaft side. It is configured such that the coil spring held by the cap is pushed and engaged with each other, and the gear in the handle main body is operated by operating the handle main body beyond the operation limit of the mechanical section.
2. The handle main body is made to idle with respect to the shaft side by overcoming the gear on the shaft side.
Manual operation means having an overload releasing function in the described bed or the like.