JP3051389B1 - Fall prevention device for work at height - Google Patents
Fall prevention device for work at heightInfo
- Publication number
- JP3051389B1 JP3051389B1 JP11003056A JP305699A JP3051389B1 JP 3051389 B1 JP3051389 B1 JP 3051389B1 JP 11003056 A JP11003056 A JP 11003056A JP 305699 A JP305699 A JP 305699A JP 3051389 B1 JP3051389 B1 JP 3051389B1
- Authority
- JP
- Japan
- Prior art keywords
- locking
- locking claw
- tip
- claw
- rotation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
【要約】
【課題】 本発明は、係止解除が容易な高所作業用墜落
防止器を提供する。
【解決手段】 命綱１を引き出し自在に巻き取る巻取器
２の巻取回動体３の周辺部に係止爪４を枢着し、係止爪
４の外側に、ラチェット内歯車体５を設け、係止爪４の
回動突出を抑制する弾性体６を設け、弾性体６の弾性度
を命綱１を引き出したとき遠心力により係止爪４の先端
部が外方へ回動突出して係止歯５ａの係止角部７で巻取
回動体３の回転を停止するように設定した高所作業用墜
落防止器において、係止歯５ａの係止角部７の角度を鈍
角に設定して、巻き取り回動が停止した際、係止爪４の
先端部が弾性体６に抗して外方へ回動突出しても係止爪
４の先端部が係止しない若しくは係止しても解除可能と
なるように係止角部７を構成したものである。An object of the present invention is to provide a fall prevention device for working at heights, which can be easily unlocked. SOLUTION: A locking claw 4 is pivotally mounted on a periphery of a take-up rotating body 3 of a winder 2 which winds up the lifeline 1 so as to be freely pulled out, and a ratchet internal gear body 5 is provided outside the locking claw 4. An elastic body 6 for suppressing the rotation protrusion of the locking claw 4 is provided, and when the lifeline 1 is pulled out, the distal end portion of the locking claw 4 rotates and protrudes outward due to centrifugal force when the lifeline 1 is pulled out. In the fall prevention device for work at height set so that the rotation of the winding rotary body 3 is stopped at the locking corners 7 of the locking teeth 5a, the angle of the locking corners 7 of the locking teeth 5a is set to an obtuse angle. When the take-up rotation stops, the tip of the locking claw 4 is not locked or locked even if the tip of the locking claw 4 is pivotally projected outward against the elastic body 6. The locking corner 7 is configured to be able to be released.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高所作業用墜落防
止器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fall prevention device for working at height.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】本出願
人は、実用新案登録第２５７３４４８号により高所作業
用墜落防止器（以下、従来例という。）を提案してい
る。2. Description of the Related Art The applicant of the present invention has proposed a fall arrester for working at heights (hereinafter referred to as a conventional example) according to Japanese Utility Model Registration No. 2573448.
【０００３】この従来例は、高所で作業する作業者が万
一足を踏み外して墜落したとき、この墜落を阻止して作
業者の人命を守ることができるものとして極めて画期的
である。[0003] This conventional example is extremely epoch-making in that if a worker working at a high place falls down by stepping off, the fall can be prevented and the life of the worker can be protected.
【０００４】具体的に説明すると、この従来例は、巻取
器２を建物の所望の位置に吊り下げ、巻取器２の下部に
設けた命綱１の出入り口部２ｂより巻取回動体３に巻回
された命綱１を引き出し、先端の取付フック９を作業者
のベルトの係止環などに係止して作業を行い、作業者が
万一足を踏み外して墜落すると、命綱１が急激に引き出
されて巻取回動体３が所定回転速度若しくは所定回転加
速度以上で回転するので、巻取回動体３と共に回動する
係止爪４の先端部が遠心力により弾性体６の弾性度に打
ち勝って係止爪ピン９を軸として外方に回動突出し、巻
取器２の内部に止着したラチェット内歯車体５の係止歯
５ａで係止されて巻取回動体３の回転を停止し作業者の
墜落を防止することができる。More specifically, in this conventional example, the winder 2 is hung at a desired position in a building, and the winder 2 is attached to the winding rotary body 3 through an entrance 2b of a lifeline 1 provided below the winder 2. When the wound lifeline 1 is pulled out, the mounting hook 9 at the tip is locked by a locking ring of a worker's belt, etc., the work is performed. Since the take-up rotating body 3 is pulled out and rotates at a predetermined rotational speed or a predetermined rotational acceleration or more, the tip of the locking claw 4 that rotates together with the take-up rotary body 3 overcomes the elasticity of the elastic body 6 due to centrifugal force. The rotation of the winding rotary member 3 is stopped by being locked by the locking teeth 5a of the ratchet internal gear body 5 fixed to the inside of the winder 2 so as to rotate outwardly with the locking claw pin 9 as an axis. The worker can be prevented from falling.
【０００５】また、この従来例に係る係止爪４の係止歯
５ａに対する係止を解除する場合には、一度命綱１を巻
き取らせるように巻取回動体３を回動させると、係止爪
４の先端部の係止歯５ａに対する係止が解除され、係止
爪４は弾性体６の復帰弾性力により元の位置に復帰回動
することになる。In order to release the locking of the locking claw 4 to the locking teeth 5a according to the conventional example, the winding rotary body 3 is rotated once so that the lifeline 1 is wound. The locking of the tip of the locking claw 4 with the locking tooth 5a is released, and the locking claw 4 returns to its original position by the return elastic force of the elastic body 6 and rotates.
【０００６】ところで、本出願人は、この従来例につい
て更なる研究開発を進めているうちに、巻取回動体３が
命綱１を最後まで巻き取り、その巻き取り回動が停止し
た際、係止爪４の先端部が回動中の遠心力又は停止時の
慣性力により前記弾性体６に抗して外方へ回動突出し、
偶然にも、係止爪４の先端部が係止歯５ａに係止してし
まう場合があることが判明した。By the way, the applicant of the present invention has been engaged in further research and development of this conventional example, and when the winding rotating body 3 has wound the lifeline 1 to the end and the winding rotation has been stopped, The tip of the pawl 4 pivotally projects outward against the elastic body 6 by centrifugal force during rotation or inertia force at the time of stop,
It has been found that the tip of the locking claw 4 may accidentally lock on the locking tooth 5a.
【０００７】従って、従来例は、命綱１を最後まで巻き
取らせたときに係止爪４が係止歯５ａに係止してしまう
と、命綱１はそれ以上巻き取ることができない為、係止
爪４の係止歯５ａに対する係止が解除できなくなり使用
できなくなるおそれがある。Therefore, in the conventional example, if the locking claw 4 is locked on the locking teeth 5a when the lifeline 1 is completely wound, the lifeline 1 cannot be further wound up. There is a possibility that the locking of the pawl 4 with the locking tooth 5a cannot be released and the locking claw 4 cannot be used.
【０００８】この場合、巻取器２を分解などして修理す
るしか手段はなく、特に作業現場でのこの修理作業は極
めて厄介である。In this case, there is no other way but to repair the winder 2 by disassembling or the like. Particularly, this repair work at the work site is extremely troublesome.
【０００９】本発明は、上述の問題点に着目し、係止歯
の係止角部の角度を鈍角に設定して、巻取回動体が命綱
を最後まで巻き取り、その巻き取り回動を停止した際、
係止爪の先端部が回動中の遠心力又は停止時の慣性力に
より前記弾性体に抗して外方へ回動突出してもこの係止
爪の先端部が係止しない若しくは係止しても解除可能と
なるように係止角部を構成した画期的な高所作業用墜落
防止器を提供するものである。In view of the above problems, the present invention sets the angle of the locking angle portion of the locking tooth to an obtuse angle, and the winding rotating body winds the lifeline to the end, and the winding rotation is performed. When stopped,
Even if the tip of the locking claw is pivotally protruded outward against the elastic body due to centrifugal force during rotation or inertial force at the time of rotation, the tip of the locking claw is not locked or locked. It is intended to provide an epoch-making fall prevention device for work at a high place, in which a locking corner portion is constituted so as to be able to be released even when the device is released.
【００１０】[0010]
【課題を解決するための手段】添付図面を参照して本発
明の要旨を説明する。The gist of the present invention will be described with reference to the accompanying drawings.
【００１１】命綱１を引き出し自在に巻き取り収納する
巻取器２の巻取回動体３の周辺部に係止爪４を枢着し、
この巻取回動体３と共に回動する係止爪４の外側に、係
止爪４の先端部を係止する係止角部７を有する係止歯５
ａを設けたラチェット内歯車体５を設け、この係止爪４
の先端部の外方への回動突出を抑制する弾性体６を設
け、この弾性体６の弾性度を前記巻取回動体３が所定回
転速度若しくは所定回転加速度以上で回転するように命
綱１を引き出したとき遠心力により係止爪４の先端部が
外方へ回動突出して前記係止歯５ａの係止角部７で係止
されて巻取回動体３の回転を停止するように設定した高
所作業用墜落防止器において、前記係止歯５ａの係止角
部７の角度を鈍角に設定して、前記巻取回動体３が命綱
１を最後まで巻き取り、その巻き取り回動が停止した
際、係止爪４の先端部が回動中の遠心力又は停止時の慣
性力により前記弾性体６に抗して外方へ回動突出しても
この係止爪４の先端部が係止しない若しくは係止しても
解除可能となるように前記係止角部７を構成したことを
特徴とする高所作業用墜落防止器に係るものである。A locking claw 4 is pivotally mounted on a periphery of a take-up rotating body 3 of a take-up device 2 for taking up and storing the lifeline 1 so as to be freely pulled out.
A locking tooth 5 having a locking corner 7 for locking the tip of the locking claw 4 on the outside of the locking claw 4 that rotates together with the winding rotary body 3.
a provided with a ratchet internal gear body 5 provided with a
An elastic body 6 for suppressing the outward rotation of the distal end portion of the winding rope 1 is provided. The elasticity of the elastic body 6 is adjusted so that the winding rotary body 3 rotates at a predetermined rotation speed or a predetermined rotation acceleration or more. Is pulled out by centrifugal force so that the tip of the locking claw 4 pivots outward and is locked by the locking corner 7 of the locking tooth 5a to stop the rotation of the winding rotary member 3. In the fall prevention device for aerial work that has been set, the angle of the locking angle portion 7 of the locking tooth 5a is set to an obtuse angle, and the winding rotating body 3 winds up the lifeline 1 to the end. When the movement is stopped, even if the tip of the locking claw 4 protrudes outward against the elastic body 6 due to the centrifugal force during rotation or the inertia force at the time of stopping, the tip of the locking claw 4 Characterized in that the locking corner portion 7 is configured so that the portion is not locked or can be released even if locked. Those of the drop preventer.
【００１２】また、前記係止歯５ａの係止角部７の角度
を、前記巻取回動体３が命綱１を最後まで巻き取り、そ
の巻き取り回動が停止した際、係止爪４の先端部が回動
中の遠心力又は停止時の慣性力により前記弾性体６に抗
して外方へ回動突出しても係止爪４が弾性体６の復帰弾
性力により復帰回動して係止爪４の先端部が係止しない
鈍角に設定して前記係止角部７を構成したことを特徴と
する請求項１記載の高所作業用墜落防止器に係るもので
ある。The angle of the locking corner 7 of the locking tooth 5a is adjusted by adjusting the angle of the locking claw 4 when the winding rotating body 3 winds the lifeline 1 to the end and the winding rotation stops. Even when the distal end portion of the elastic member 6 protrudes outward against the elastic body 6 due to centrifugal force during rotation or inertia force at the time of stop, the locking claw 4 returns and rotates due to the returning elastic force of the elastic body 6. The fall prevention device for work at height according to claim 1, characterized in that the engagement corner portion (7) is formed by setting an obtuse angle at which the tip of the engagement claw (4) does not engage.
【００１３】また、前記係止歯５ａの係止角部７の角度
を、前記巻取回動体３が命綱１を最後まで巻き取り、そ
の巻き取り回動が停止した際、係止爪４の先端部が回動
中の遠心力又は停止時の慣性力により前記弾性体６に抗
して外方へ回動突出して係止爪４の先端部が係止した
際、この係止爪４の先端部の係止角部７に対する係止が
巻取回動体３などのクリアランスにより解除され、係止
爪４が弾性体６の復帰弾性力により復帰回動して係止爪
４の先端部の係止が解除可能となる鈍角に設定して前記
係止角部７を構成したことを特徴とする請求項１記載の
高所作業用墜落防止器に係るものである。The angle of the locking corner 7 of the locking tooth 5a is adjusted by adjusting the angle of the locking claw 4 when the winding rotating body 3 winds the lifeline 1 to the end and the winding rotation stops. When the distal end of the locking claw 4 is locked by projecting outwardly against the elastic body 6 by the centrifugal force during rotation or the inertia force at the time of stop and the leading end of the locking claw 4 is locked. The locking of the distal end portion with respect to the locking corner portion 7 is released by the clearance of the winding rotary member 3 and the like, and the locking claw 4 is returned and rotated by the return elastic force of the elastic body 6 so that the distal end portion of the locking claw 4 is rotated. The fall prevention device for work at height according to claim 1, wherein the locking angle portion (7) is configured to have an obtuse angle at which locking can be released.
【００１４】[0014]
【発明の実施の形態】好適と考える本発明の実施の形態
（発明をどのように実施するか）を、図面に基づいてそ
の作用効果を示して簡単に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention (how to implement the invention) will be briefly described with reference to the drawings, showing the operational effects thereof.
【００１５】本発明は、巻取回動体３が所定回転速度若
しくは所定回転加速度以上で回転するように命綱１を引
き出し回転したとき遠心力により係止爪４の先端部が外
方へ回動突出して係止する係止歯５ａの係止角部７を鈍
角に設定することで、巻取回動体３が命綱１を最後まで
巻き取り、その巻き取り回動が停止した際、係止爪４の
先端部が回動中の遠心力又は停止時の慣性力により前記
弾性体６に抗して外方へ回動突出してもこの係止爪４の
先端部が係止しない若しくは係止しても解除可能となる
ように前記係止角部７を構成している。According to the present invention, when the lifeline 1 is pulled out and rotated so that the winding rotary body 3 rotates at a predetermined rotational speed or a predetermined rotational acceleration or more, the tip of the locking claw 4 is rotationally projected outward by centrifugal force. By setting the locking angle portion 7 of the locking tooth 5a to be locked by an obtuse angle, the winding rotary body 3 winds the lifeline 1 to the end, and when the winding rotation stops, the locking claw 4 The tip of the locking claw 4 does not lock or locks even if the tip of the locking claw 4 projects outwardly against the elastic body 6 due to centrifugal force during rotation or inertia force at the time of stop. The locking corner 7 is configured to be able to be released.
【００１６】これは、従来例は、図５に図示したように
係止爪４の先端部を係止歯５ａの係止角部７に確実に係
止させるという見地から係止角部７の角度は係止爪４の
先端部形状に合わせて鋭角に形成されていたが、この係
止歯５ａの係止角部７に深く嵌まり込んでいる係止爪４
の先端部の係止を解除するには、係止爪４を係止歯５ａ
の分だけ戻さなければならず（巻取回動体３を命綱１の
巻き取り方向に回動させなければならず)、よって、巻取
回動体３が命綱１を最後まで巻き取り、その巻き取り回
動が停止した際、偶然にも、係止爪４の先端部が係止歯
５ａに係止してしまうと、この係止を解除する分だけ命
綱１を巻き取ることはできない為、巻取器２を分解する
などしない限り、もはやその係止を解除するのは不可能
である。This is because, in the conventional example, as shown in FIG. 5, the tip of the locking claw 4 is securely locked to the locking corner 7 of the locking tooth 5a. Although the angle is formed to be an acute angle in accordance with the shape of the tip of the locking claw 4, the locking claw 4 deeply fitted into the locking corner 7 of the locking tooth 5 a.
In order to release the locking of the distal end of the locking member 4, the locking claw 4 is
(The winding rotating body 3 must be rotated in the winding direction of the lifeline 1), so that the winding rotating body 3 winds the lifeline 1 to the end, and the winding When the rotation stops, if the tip of the locking claw 4 is accidentally locked to the locking tooth 5a, the lifeline 1 cannot be wound up by the amount to release the locking. Unless the take-off device 2 is disassembled, it is no longer possible to release the lock.
【００１７】そこで、本発明者はこの点に着目し、この
たび本発明を完成させたもので、係止歯５ａの係止角部
７の角度を鈍角に設定している。Therefore, the present inventor pays attention to this point, and has completed the present invention, and sets the angle of the locking corner 7 of the locking tooth 5a to an obtuse angle.
【００１８】この係止角部７の角度として設定した鈍角
とは、以下の通りである。The obtuse angle set as the angle of the locking corner 7 is as follows.
【００１９】即ち、前述したように係止爪４が係止歯５
ａの係止角部７に係止する場合としては、巻取回動体３
が所定回転速度若しくは所定回転加速度以上で回転する
ように命綱１を引き出したとき遠心力により係止爪４の
先端部が外方へ回動突出した場合と、巻取回動体３が命
綱１を最後まで巻き取り、その巻き取り回動が停止した
際、係止爪４の先端部が回動中の遠心力又は停止時の慣
性力により前記弾性体６に抗して外方へ回動突出した場
合との２通りあるが、本発明は係止角部７の角度を、前
者の場合に対しては、常に命綱１には強い引き出し力が
かかっているメリットを利用することで、係止角部７に
係止した係止爪４がその係止を保持し得るだけの十分な
係止力を得ることができ、そして、後者の場合に対して
は、前者の場合と異なり命綱１には強い引き出し力はか
かっておらず常に係止爪４に弾性体６の復帰弾性力が強
くかかっているメリットを利用することで、係止爪４は
係止角部７に係止しないで復帰回動したり、仮に係止し
たとしても例えば巻取回動体３などのクリアランスによ
り容易に解除され、係止爪４が弾性体６の復帰弾性力に
より復帰回動してその係止が解除することができる鈍角
に前記係止角部７の角度を設定している。That is, as described above, the locking claw 4 is
In the case of locking at the locking corner portion 7a, the winding rotary body 3
When the lifeline 1 is pulled out so as to rotate at a predetermined rotation speed or a predetermined rotation acceleration or more, the distal end of the locking claw 4 pivotally projects outward due to centrifugal force. When the take-up rotation is stopped, the distal end of the locking claw 4 is protruded outward against the elastic body 6 by centrifugal force during rotation or inertia force at the time of stop. In the present invention, the angle of the locking corner 7 is adjusted by using the advantage that the lifeline 1 is always subjected to a strong pull-out force. The locking claw 4 locked to the corner 7 can obtain a sufficient locking force to hold the locking, and in the latter case, unlike the former case, the lifeline 1 Means that the return elastic force of the elastic body 6 is always strongly applied to the locking claw 4 without applying a strong pulling force. With the use of the slot, the locking claw 4 returns and rotates without being locked to the locking corner 7, and even if locked, it is easily released by the clearance of the winding rotary body 3 or the like, for example. The angle of the locking corner 7 is set to an obtuse angle at which the locking claw 4 can return and rotate by the return elastic force of the elastic body 6 and release the locking.
【００２０】以上から、本発明は、命綱１を引き出す方
向に巻取回動体３が回動している場合には、従来例と同
様に外方へ回動突出した係止爪４の先端部が確実に係止
角部７に係止し、一方、巻取回動体３が命綱１を最後ま
で巻き取り、その巻き取り回動が停止した際、係止爪４
の先端部が回動中の遠心力又は停止時の慣性力により前
記弾性体６に抗して外方へ回動突出しても、例えば係止
爪４が弾性体６の復帰弾性力により復帰回動して係止爪
４の先端部が係止しない、或いは、仮に係止爪４の先端
部が係止したとしても、この係止爪４の先端部の係止角
部７に対する係止が巻取回動体３などのクリアランスに
より解除され、係止爪４が弾性体６の復帰弾性力により
復帰回動して係止爪４の先端部の係止が解除することに
なる。As described above, according to the present invention, when the take-up rotating body 3 is rotating in the direction in which the lifeline 1 is pulled out, the tip of the locking claw 4 that is protruded outward in the same manner as in the conventional example. Is securely locked to the locking corner 7, while the winding rotating body 3 winds the lifeline 1 to the end, and when the winding rotation stops, the locking claw 4
For example, even if the tip of the elastic member 6 projects outwardly against the elastic body 6 due to the centrifugal force during rotation or the inertia force at the time of stop, the locking claw 4 returns due to the return elastic force of the elastic body 6. Even if the distal end of the locking claw 4 is not locked due to the movement, or if the distal end of the locking claw 4 is locked, the locking of the distal end of the locking claw 4 with respect to the locking corner 7 may be performed. The locking claw 4 is released by the clearance of the winding rotary member 3 and the like, and the locking claw 4 is returned and rotated by the returning elastic force of the elastic body 6 to release the locking of the distal end portion of the locking claw 4.
【００２１】従って、従来例は、巻取回動体３が命綱１
を最後まで巻き取り、その巻き取り回動が停止した際、
係止爪４の先端部が回動中の遠心力又は停止時の慣性力
により前記弾性体６に抗して外方へ回動突出し、偶然に
も、係止爪４の先端部が係止歯５ａに係止して使用でき
なくなってしまうなどの問題点があったが、本発明によ
ればその問題点は確実に解消されることになり、係止爪
４の先端部が係止歯５ａに係止する必要のある場面には
確実に係止し、係止する必要のない場面には係止しない
若しくは仮に係止しても容易にその係止が解除されるこ
とになる。Therefore, in the conventional example, the winding rotating body 3 is
When the take-up rotation stops,
The tip of the locking claw 4 is rotated and projected outward against the elastic body 6 by centrifugal force during rotation or inertia force at the time of stop, and the tip of the locking claw 4 is accidentally locked. However, according to the present invention, such a problem can be surely solved, and the tip of the locking claw 4 is fixed to the locking tooth. It is securely locked in the scene where it is necessary to lock to 5a, and it is not locked in the scene where it is not necessary to lock, or even if it is temporarily locked, the lock is easily released.
【００２２】[0022]
【実施例】本発明の具体的な実施例について図面に基づ
いて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described with reference to the drawings.
【００２３】本実施例は、二枚合わせのケース本体２ａ
から成る巻取器２内に巻取回動体３を回動自在に設けて
いる。この巻取回動体３の外周面にコ字状凹部３ａを形
成し、このコ字状凹部３ａ内に命綱１を巻回し、命綱１
を巻取器２の下方に設けた出入り口部２ｂより引き出し
自在に設け、命綱１の先端に取付フック14を付設し、巻
取回動体３の一側（図３中右側）にフランジ部３ｂを一
体物で連設し、このフランジ部３ｂの内部に命綱１を巻
取回動体３に常に巻き取る方向（図２中ｂ方向）に付勢
するゼンマイバネ８を内設する。In this embodiment, the case body 2a
The take-up rotating body 3 is rotatably provided in the take-up device 2 composed of. A U-shaped concave portion 3a is formed on the outer peripheral surface of the winding rotary member 3, and the lifeline 1 is wound in the U-shaped concave portion 3a.
Is provided so as to be able to be pulled out from an entrance 2b provided below the winder 2, a mounting hook 14 is attached to the tip of the lifeline 1, and a flange 3b is provided on one side (the right side in FIG. 3) of the winding rotary body 3. A mainspring 8 is provided inside the flange portion 3b to bias the lifeline 1 in the winding direction (the direction b in FIG. 2).
【００２４】また、巻取回動体３の一側面の対向位置箇
所に一対の係止爪ピン９を止着し、この係止爪ピン９夫
々に係止爪４の基端部を枢着し、この夫々の係止爪４の
中央部にコイルバネを採用した弾性体６の一端部を連結
し、この弾性体６の他端部を巻取回動体３の一側面の対
向位置箇所に立設した立設杆材12に連結し、よって、こ
の弾性体６により係止爪４の先端部が常態で外方へ回動
突出することを抑制するよう構成している。符号11は係
止爪ストッパーである。Further, a pair of locking claw pins 9 are fixed to opposite positions on one side surface of the winding rotary body 3, and the base end of the locking claw 4 is pivotally mounted on each of the locking claw pins 9. One end of an elastic body 6 employing a coil spring is connected to the center of each of the locking claws 4, and the other end of the elastic body 6 is erected at a position facing one side of the winding rotary body 3. The elastic member 6 prevents the distal end portion of the locking claw 4 from rotating and protruding outward in a normal state. Reference numeral 11 denotes a locking claw stopper.
【００２５】また、夫々の係止爪４を囲む状態にラチェ
ット内歯車体５を巻取器２の内側にリベット10を介して
止着固定し、このラチェット内歯車体５の内形を所定間
隔をおいて鋸歯形状のラチェット歯形に形成して係止角
部７を有する係止歯５ａを設けている。Further, a ratchet internal gear body 5 is fastened and fixed to the inside of the winder 2 via a rivet 10 so as to surround the respective locking claws 4, and the internal shape of the ratchet internal gear body 5 is fixed at a predetermined interval. In this case, a locking tooth 5a having a locking corner portion 7 formed in a sawtooth ratchet tooth shape is provided.
【００２６】以上の構成から、本実施例は巻取回動体３
が所定回転速度若しくは所定回転加速度以上で回転する
ように命綱１を引き出したとき遠心力により係止爪４の
先端部が弾性体６に抗して外方へ回動突出することでラ
チェット内歯車体５の係止歯５ａで係止されて巻取回動
体３の回動が停止されるように構成されている。With the above configuration, the present embodiment has the winding rotary member 3
When the lifeline 1 is pulled out so as to rotate at a predetermined rotation speed or a predetermined rotation acceleration or more, the tip end of the locking claw 4 pivotally protrudes outward against the elastic body 6 by centrifugal force, so that the ratchet internal gear is rotated. The rotation of the winding rotary body 3 is stopped by the locking teeth 5 a of the body 5.
【００２７】本実施例は、図１に図示したように係止歯
５ａの係止角部７の角度を鈍角に設定している。In this embodiment, as shown in FIG. 1, the angle of the locking corner 7 of the locking tooth 5a is set to an obtuse angle.
【００２８】即ち、前記係止歯５ａの係止角部７の角度
を、前記巻取回動体３が命綱１を最後まで巻き取り、そ
の巻き取り回動が停止した際、係止爪４の先端部が回動
中の遠心力又は停止時の慣性力により前記弾性体６に抗
して外方へ回動突出しても係止爪４が弾性体６の復帰弾
性力により復帰回動して係止爪４の先端部が係止しない
鈍角に設定して前記係止角部７を構成し、或いは、係止
爪４の先端部が係止した際、この係止爪４の先端部の係
止角部７に対する係止が巻取回動体３などのクリアラン
スにより解除され、係止爪４が弾性体６の復帰弾性力に
より復帰回動して係止爪４の先端部の係止が解除可能と
なる鈍角に設定して前記係止角部７を構成している。That is, the angle of the locking corner 7 of the locking tooth 5a is adjusted by the winding rotary member 3 when the winding rope 1 is completely wound and the winding rotation is stopped. Even when the distal end portion of the elastic member 6 protrudes outward against the elastic body 6 due to centrifugal force during rotation or inertia force at the time of stop, the locking claw 4 returns and rotates due to the returning elastic force of the elastic body 6. The locking corner 7 is formed by setting the tip of the locking claw 4 to an obtuse angle at which the locking claw 4 is not locked, or when the tip of the locking claw 4 is locked, The locking with respect to the locking corner 7 is released by the clearance of the take-up rotating body 3 and the like, and the locking claw 4 is returned and rotated by the returning elastic force of the elastic body 6 to lock the tip of the locking claw 4. The locking angle portion 7 is configured to have an obtuse angle that can be released.
【００２９】更に、具体的に説明すると、図４に図示し
たように係止角部７を鈍角に設定することで、係止歯５
ａの頂部５ａ’を、係止爪４が係止爪ピン９を軸として
回動した際、係止爪４の先端が描く軌道円弧ｒ上からわ
ずかに突出するように構成し、この突出量は、図５に図
示した従来例に比しても係止爪４の先端部が係止歯５ａ
の係止角部７に係止する場合は極めて少なく、万一係止
したとしてもその係止は巻取回動体３などのクリアラン
ス（ガタつき）により解除され、係止爪４が弾性体６の
復帰弾性力により復帰回動して係止爪４の先端部の係止
が解除可能となるように設定されている。More specifically, as shown in FIG. 4, by setting the locking corner 7 to an obtuse angle, the locking teeth 5
The top portion 5a 'of a is configured such that when the locking claw 4 rotates about the locking claw pin 9, the tip of the locking claw 4 slightly protrudes from the orbital arc r drawn by the claw 4. Is different from the conventional example shown in FIG. 5 in that the distal end of the locking claw 4 has a locking tooth 5a.
Is extremely rare, and even if it is locked, the lock is released by the clearance (rattle) of the winding rotary member 3 and the like, and the locking claw 4 is Is set so as to be able to be returned and rotated by the return elastic force to release the locking of the tip of the locking claw 4.
【００３０】符号２ｃは巻取器２を吊り下げ固定するた
めの吊下用部、13は出入り口部２ｂより命綱１の先端部
を外出状態に保持せしめる係止保持部材、15は軸杆であ
る。Reference numeral 2c denotes a suspending portion for suspending and fixing the winder 2, 13 denotes a locking and holding member for holding the tip of the lifeline 1 out of the doorway 2b, and 15 denotes a shaft rod. .
【００３１】よって、本実施例によれば、従来例は、巻
取回動体３が命綱１を最後まで巻き取り、その巻き取り
回動が停止した際、係止爪４の先端部が回動中の遠心力
又は停止時の慣性力により前記弾性体６に抗して外方へ
回動突出し、偶然にも、係止爪４の先端部が係止歯５ａ
に係止して使用できなくなってしまうなどの問題点があ
ったが、本実施例によればその問題点は確実に解消さ
れ、係止爪４の先端部が係止歯５ａに係止する必要のあ
る場面には確実に係止して万一の作業者の墜落等を防止
して安全となり、係止する必要のない場面には確実に係
止しない若しくは仮に係止しても容易にその係止が解除
されることになる。Therefore, according to the present embodiment, in the conventional example, when the take-up rotating body 3 takes up the lifeline 1 to the end and the take-up rotation stops, the tip of the locking claw 4 rotates. Due to the centrifugal force in the middle or the inertia force at the time of stop, the elastic member 6 is pivotally protruded outward against the elastic body 6, and by accident, the tip of the locking claw 4 is locked with the locking tooth 5 a
However, according to the present embodiment, the problem is reliably solved, and the tip of the locking claw 4 is locked to the locking tooth 5a. Securely locks when it is necessary to prevent accidental fall of workers, etc., and secures it when it is not necessary to lock it. The lock will be released.
【００３２】また、本実施例は、単に係止歯５ａの係止
角部７の角度を鈍角に設定するだけの簡易構造故に量産
性に秀れることになる。Further, the present embodiment is excellent in mass productivity because of a simple structure in which the angle of the locking corner 7 of the locking tooth 5a is simply set to an obtuse angle.
【００３３】[0033]
【発明の効果】本発明は上述のように構成したから、従
来例は、巻取回動体が命綱を最後まで巻き取り、その巻
き取り回動が停止した際、係止爪の先端部が回動中の遠
心力又は停止時の慣性力により前記弾性体に抗して外方
へ回動突出し、偶然にも、係止爪の先端部が係止歯に係
止して使用できなくなってしまうなどの問題点があった
が、本発明によればその問題点は確実に解消され、係止
爪の先端部が係止歯に係止する必要のある場面には確実
に係止して万一の作業者の墜落等を防止して安全とな
り、係止する必要のない場面には確実に係止しない若し
くは仮に係止しても容易にその係止が解除されることに
なりより一層商品価値が向上することになるなど極めて
画期的な高所作業用墜落防止器となる。Since the present invention is constructed as described above, in the conventional example, when the take-up rotating body takes up the lifeline to the end, and when the take-up rotation stops, the tip of the locking claw rotates. Due to the centrifugal force during movement or the inertia force at the time of stoppage, the protrusion pivots outwardly against the elastic body, and the tip of the locking claw is accidentally locked by the locking tooth and cannot be used. However, according to the present invention, the problem is reliably solved, and when the tip of the locking claw needs to be locked to the locking tooth, the locking claw is securely locked. It is safe to prevent the fall of one worker, etc., and it will not be locked securely when it is not necessary to lock it, or it will be released easily if it is temporarily locked It will be an extremely revolutionary fall prevention device for work at heights, such as an increase in value.
【図１】本実施例に係る要部の説明図である。FIG. 1 is an explanatory diagram of a main part according to the present embodiment.
【図２】本実施例に係る要部を説明する断面図である。FIG. 2 is a cross-sectional view illustrating a main part according to the embodiment.
【図３】本実施例に係る要部を説明する断面図である。FIG. 3 is a cross-sectional view illustrating a main part according to the embodiment.
【図４】本実施例に係る要部の概略動作説明図である。FIG. 4 is a schematic operation explanatory view of a main part according to the present embodiment.
【図５】従来例に係る要部の概略動作説明図である。FIG. 5 is a schematic operation explanatory view of a main part according to a conventional example.
１ 命綱 ２ 巻取器 ３ 巻取回動体 ４ 係止爪 ５ ラチェット内歯車体 ５ａ 係止部 ６ 弾性体 ７ 係止角部 DESCRIPTION OF SYMBOLS 1 Lifeline 2 Winder 3 Winding rotating body 4 Locking claw 5 Ratchet internal gear 5a Locking part 6 Elastic body 7 Locking corner
Claims (3)
巻取器の巻取回動体の周辺部に係止爪を枢着し、この巻
取回動体と共に回動する係止爪の外側に、係止爪の先端
部を係止する係止角部を有する係止歯を設けたラチェッ
ト内歯車体を設け、この係止爪の先端部の外方への回動
突出を抑制する弾性体を設け、この弾性体の弾性度を前
記巻取回動体が所定回転速度若しくは所定回転加速度以
上で回転するように命綱を引き出したとき遠心力により
係止爪の先端部が外方へ回動突出して前記係止歯の係止
角部で係止されて巻取回動体の回転を停止するように設
定した高所作業用墜落防止器において、前記係止歯の係
止角部の角度を鈍角に設定して、前記巻取回動体が命綱
を最後まで巻き取り、その巻き取り回動が停止した際、
係止爪の先端部が回動中の遠心力又は停止時の慣性力に
より前記弾性体に抗して外方へ回動突出してもこの係止
爪の先端部が係止しない若しくは係止しても解除可能と
なるように前記係止角部を構成したことを特徴とする高
所作業用墜落防止器。An engaging claw is pivotally mounted on a periphery of a take-up rotating body of a take-up device that winds up and retracts a lifeline so as to be freely pulled out. An elastic body that is provided with a ratchet internal gear body provided with a locking tooth having a locking corner for locking the distal end of the locking claw, and that suppresses the outward rotation of the distal end of the locking claw. When the life rope is pulled out so that the winding rotating body rotates at a predetermined rotation speed or a predetermined rotation acceleration or more, the tip of the locking claw is pivotally projected outward by centrifugal force. In the fall prevention device for aerial work set to be stopped at the locking corners of the locking teeth and stop the rotation of the winding rotary body, the angle of the locking corners of the locking teeth is made obtuse. Setting, when the winding rotating body winds up the lifeline to the end, and when the winding rotation stops,
Even if the tip of the locking claw is pivotally protruded outward against the elastic body due to centrifugal force during rotation or inertial force at the time of rotation, the tip of the locking claw is not locked or locked. The fall prevention device for working at heights, wherein the locking corner portion is configured to be capable of being released even when the device is released.
取回動体が命綱を最後まで巻き取り、その巻き取り回動
が停止した際、係止爪の先端部が回動中の遠心力又は停
止時の慣性力により前記弾性体に抗して外方へ回動突出
しても係止爪が弾性体の復帰弾性力により復帰回動して
係止爪の先端部が係止しない鈍角に設定して前記係止角
部を構成したことを特徴とする請求項１記載の高所作業
用墜落防止器。2. When the take-up rotating body winds up the lifeline to the end, and when the take-up rotation stops, the tip of the locking claw rotates. Even if the centrifugal force during stopping or the inertia force at the time of stop causes the elastic claw to protrude outward against the elastic body, the locking claw returns to rotate by the return elastic force of the elastic body and the tip of the locking claw is engaged. The fall prevention device for work at height according to claim 1, wherein the locking angle portion is formed by setting an obtuse angle at which the stop does not stop.
取回動体が命綱を最後まで巻き取り、その巻き取り回動
が停止した際、係止爪の先端部が回動中の遠心力又は停
止時の慣性力により前記弾性体に抗して外方へ回動突出
して係止爪の先端部が係止した際、この係止爪の先端部
の係止角部に対する係止が巻取回動体などのクリアラン
スにより解除され、係止爪が弾性体の復帰弾性力により
復帰回動して係止爪の先端部の係止が解除可能となる鈍
角に設定して前記係止角部を構成したことを特徴とする
請求項１記載の高所作業用墜落防止器。3. The angle of the locking corner of the locking tooth is adjusted by rotating the winding rotatable member to the end of the lifeline, and when the winding rotation is stopped, the tip of the locking claw is rotated. When the tip of the locking claw is locked by projecting outwardly against the elastic body due to the centrifugal force or the inertia force at the time of stop, and the tip of the locking claw is locked against the locking corner portion The locking is released by the clearance of the take-up rotating body or the like, and the locking claw is set to an obtuse angle at which the locking of the tip of the locking claw can be released by the return rotation by the return elastic force of the elastic body. The fall prevention device for working at heights according to claim 1, wherein a locking corner is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11003056A JP3051389B1 (en) | 1999-01-08 | 1999-01-08 | Fall prevention device for work at height |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11003056A JP3051389B1 (en) | 1999-01-08 | 1999-01-08 | Fall prevention device for work at height |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP3051389B1 true JP3051389B1 (en) | 2000-06-12 |
| JP2000197712A JP2000197712A (en) | 2000-07-18 |
Family
ID=11546680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11003056A Expired - Lifetime JP3051389B1 (en) | 1999-01-08 | 1999-01-08 | Fall prevention device for work at height |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3051389B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1096895C (en) * | 1998-02-03 | 2002-12-25 | 石川岛播磨重工业株式会社 | Method and apparatus for screening waste paper pulp |
| CN107420976A (en) * | 2017-05-10 | 2017-12-01 | 珠海格力电器股份有限公司 | Safety device for lifting panel, lifting panel and air conditioner |
| CN112843519A (en) * | 2021-01-25 | 2021-05-28 | 河南建筑职业技术学院 | Falling protector for high-altitude operation |
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|---|---|---|---|---|
| US20100219016A1 (en) * | 2009-03-02 | 2010-09-02 | D B Industries, Inc. | Fall arrest assembly |
| US20130062145A1 (en) * | 2010-05-25 | 2013-03-14 | Hitoshi Inoue | Fall prevention system, multiple-ring member, figure eight ring, four-hole member, method for working on roof, master rope installation method, bucket for fall prevention system, and hook for roof verge |
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| CN206630543U (en) * | 2016-08-31 | 2017-11-14 | 科沃斯机器人股份有限公司 | Safety and its cleaning robot system for clean robot |
| CN111228676B (en) * | 2020-01-15 | 2021-07-06 | 泉州市宏盼机械科技有限公司 | Safety rope anti-impact device for base station signal tower |
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1999
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1096895C (en) * | 1998-02-03 | 2002-12-25 | 石川岛播磨重工业株式会社 | Method and apparatus for screening waste paper pulp |
| CN107420976A (en) * | 2017-05-10 | 2017-12-01 | 珠海格力电器股份有限公司 | Safety device for lifting panel, lifting panel and air conditioner |
| CN107420976B (en) * | 2017-05-10 | 2023-09-08 | 珠海格力电器股份有限公司 | Safety device for lifting panel, lifting panel and air conditioner |
| CN112843519A (en) * | 2021-01-25 | 2021-05-28 | 河南建筑职业技术学院 | Falling protector for high-altitude operation |
| CN112843519B (en) * | 2021-01-25 | 2021-11-16 | 河南建筑职业技术学院 | Falling protector for high-altitude operation |
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| Publication number | Publication date |
|---|---|
| JP2000197712A (en) | 2000-07-18 |
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