JPH05208798A - Hoist tow machine - Google Patents
Hoist tow machineInfo
- Publication number
- JPH05208798A JPH05208798A JP4243809A JP24380992A JPH05208798A JP H05208798 A JPH05208798 A JP H05208798A JP 4243809 A JP4243809 A JP 4243809A JP 24380992 A JP24380992 A JP 24380992A JP H05208798 A JPH05208798 A JP H05208798A
- Authority
- JP
- Japan
- Prior art keywords
- brake
- idling
- rotation
- operation handle
- drive
- 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.)
- Granted
Links
Landscapes
- Braking Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、捲上牽引機、詳しく
は、ロードシーブを駆動する駆動軸の周りに装着するメ
カニカルブレーキ及び該メカニカルブレーキのブレーキ
押えと、該ブレーキ押えの外周部に支持する駆動部材と
の間に、摩擦板と弾性部材及び調整部材とを備えた過負
荷防止機構を設けた捲上牽引機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoisting traction machine, and more specifically, a mechanical brake mounted around a drive shaft for driving a load sheave, a brake presser of the mechanical brake, and a support on the outer peripheral portion of the brake presser. The present invention relates to a hoisting traction machine having an overload preventing mechanism including a friction plate, an elastic member, and an adjusting member between the driving member and the driving member.
【０００２】[0002]
【従来の技術】従来、この種捲上牽引機は、例えば実開
昭６１−８０７９１号公報に記載され、かつ、図９に示
すように、ロードシーブＡを減速歯車機構Ｂを介して駆
動する駆動軸Ｃの周りに、ブレーキ受けＤ、ブレーキ押
えＥ、制動用爪車Ｆ及び制動板Ｇ、Ｇから構成するメカ
ニカルブレーキＨを装着すると共に、前記ブレーキ押え
Ｅと、該ブレーキ押えＥの外周部に支持する駆動部材Ｉ
との間に、摩擦板Ｊ、Ｊと弾性部材Ｋ及び調整部材Ｌと
を備えた過負荷防止機構Ｍを設け、定格負荷以上の荷物
の捲上げ時に前記過負荷防止機構Ｍのスリップ作動によ
り捲上げをできないようにすると共に、前記調整部材Ｌ
の軸方向位置の調整により前記過負荷防止機構Ｍが作動
を始める定格負荷を調整できるようにしている。また、
前記減速歯車機構Ｂの第４歯車Ｎを外部操作によりばね
Ｏの付勢に抗して移動させて、前記駆動軸Ｃと前記ロー
ドシーブＡの連動を遮断することにより、前記ロードシ
ーブＡを遊転状態に保持して該ロードシーブＡに掛設す
るチェンを自由に引き出せるようにしている。2. Description of the Related Art Conventionally, this type of hoisting traction machine is described, for example, in Japanese Utility Model Laid-Open No. 61-80791 and drives a load sheave A via a reduction gear mechanism B as shown in FIG. A mechanical brake H composed of a brake receiver D, a brake presser E, a braking ratchet F and braking plates G, G is mounted around the drive shaft C, and the brake presser E and an outer peripheral portion of the brake presser E are mounted. Drive member I supported on
An overload prevention mechanism M including friction plates J, J, an elastic member K, and an adjusting member L is provided between the friction plate J and the friction plate J. In addition to prohibiting lifting, the adjusting member L
The rated load at which the overload prevention mechanism M starts to operate can be adjusted by adjusting the axial position. Also,
The fourth gear N of the reduction gear mechanism B is moved against the urging force of the spring O by an external operation to cut off the interlocking between the drive shaft C and the load sheave A, so that the load sheave A is free to move. The chain held on the load sheave A can be pulled out freely while being held in the rolled state.
【０００３】[0003]
【発明が解決しようとする課題】所が、斯かる従来の捲
上牽引機では、前記過負荷防止機構Ｍがスリップ作動を
始める定格負荷を調整する前記調整部材Ｌは、前記ロー
ドシーブＡを遊転状態に保持するための遊転機構、つま
り前記第４歯車Ｎを軸方向に移動させて遊転を可能にす
る機構とは別個に設け、前記過負荷防止機構のスリップ
荷重を調整する機能のみをもった専用部品として組込ま
れているのである。このため前記ロードシーブＡの遊転
状態を保持する遊転機構に対し前記過負荷防止機構Ｍの
スリップ荷重を調整する前記調整部材を別個に設ける必
要があって部品を共用することができないのであるか
ら、それだけ部品点数が多くなり、コスト高になるだけ
でなく重量も重くなる問題があった。However, in such a conventional hoisting and traction machine, the adjusting member L for adjusting the rated load at which the overload preventing mechanism M starts the slipping operation causes the load sheave A to move freely. Only the function of adjusting the slip load of the overload prevention mechanism, which is provided separately from the idling mechanism for holding the rolling state, that is, the mechanism that allows the fourth gear N to move axially to allow idling It is built in as a dedicated part with. For this reason, it is necessary to separately provide the adjusting member for adjusting the slip load of the overload prevention mechanism M with respect to the idling mechanism that holds the idling state of the load sheave A, and the parts cannot be shared. Therefore, there is a problem that not only the number of parts increases, the cost also increases, but also the weight increases.
【０００４】本発明は以上のような問題に鑑みて発明し
たもので、その目的は、過負荷防止機構の作動により過
負荷防止を行うことができ、しかも、熟練を要すること
なく駆動軸を遊転状態に保持できながら、過負荷防止機
構のスリップ荷重を調整する調整部材を、遊転保持を可
能にする遊転機構の部品に利用し、その部品点数を少な
くできる捲上牽引機を提供することにある。The present invention has been made in view of the above problems, and an object of the present invention is to prevent overload by operating an overload preventing mechanism, and to drive a drive shaft without requiring skill. Provided is a hoisting traction machine capable of reducing the number of parts by using an adjusting member for adjusting a slip load of an overload preventing mechanism as a part of a free-wheeling mechanism capable of holding a free-wheeling while maintaining the rolling state. Especially.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、ロードシーブ３を駆動する駆動軸５の周
りに装着するメカニカルブレーキ９及び該メカニカルブ
レーキ９のブレーキ押え８と、該ブレーキ押え８の外周
部に支持する駆動部材１０との間に、摩擦板１１、１２
と弾性部材１３及び調整部材１４とを備えた過負荷防止
機構１５を設けた捲上牽引機であって、前記駆動軸５の
軸端部にストッパー６０を設けて、該ストッパー６０と
前記ブレーキ押え８との間に、前記駆動軸５に対し相対
回転不能とした遊転操作ハンドル４０を軸方向移動可能
に介装して、該遊転操作ハンドル４０を前記ブレーキ押
え８側に付勢する一方、前記調整部材１４と前記操作ハ
ンドル４０との間に、前記操作ハンドル４０の非遊転操
作時、前記ブレーキ押え８の前記駆動軸５に対する所定
角度以上の相対回転を規制し、所定角度内の相対回転で
前記ブレーキ押え８のブレーキ受け７に対する螺進及び
螺退を可能にする回転規制手段と、前記操作ハンドル４
０の遊転操作時、該操作ハンドル４０の前記ブレーキ押
え８側への付勢により前記操作ハンドル４０を前記調整
部材１４に弾接し前記ブレーキ押え８の前記駆動軸５に
対する相対回転を抑制して、前記ロードシーブ３の遊転
状態を保持する遊転保持手段とを設けたのである。To achieve the above object, the present invention provides a mechanical brake 9 mounted around a drive shaft 5 for driving a load sheave 3 and a brake presser 8 of the mechanical brake 9. The friction plates 11 and 12 are provided between the brake presser 8 and the drive member 10 which is supported on the outer periphery of the brake presser 8.
A hoisting traction machine provided with an overload prevention mechanism 15 including an elastic member 13 and an adjusting member 14, wherein a stopper 60 is provided at the shaft end of the drive shaft 5, and the stopper 60 and the brake presser are provided. 8, an idling operation handle 40, which cannot rotate relative to the drive shaft 5, is interposed so as to be axially movable, and the idling operation handle 40 is urged toward the brake presser 8 side. Between the adjusting member 14 and the operation handle 40, when the operation handle 40 is in the non-idle operation, the relative rotation of the brake presser 8 with respect to the drive shaft 5 at a predetermined angle or more is restricted so that the rotation angle is within a predetermined angle. Rotation restricting means for allowing the brake presser 8 to advance and retract with respect to the brake receiver 7 by relative rotation; and the operation handle 4.
At the time of free rotation operation of 0, the operation handle 40 is elastically brought into contact with the adjusting member 14 by urging the operation handle 40 toward the brake retainer 8 side to suppress the relative rotation of the brake retainer 8 with respect to the drive shaft 5. A free rotation holding means for holding the free rotation state of the load sheave 3 is provided.
【０００６】また、遊転保持手段は、遊転保持面２２と
この遊転保持面２２に弾接して遊転保持する係合突起４
４とから成り、前記遊転保持面２２と係合突起４４との
一方を、調整部材１４と遊転操作ハンドル４０との対向
面の一方に、他方を前記調整部材１４と遊転操作ハンド
ル４０との他方に設けるのが好ましい。Further, the idling holding means includes the idling holding surface 22 and the engaging projections 4 elastically contacting the idling holding surface 22 for idly holding.
4, one of the idle holding surface 22 and the engaging protrusion 44 is provided on one of the facing surfaces of the adjusting member 14 and the idle operating handle 40, and the other is provided on the adjusting member 14 and the idle operating handle 40. It is preferable to provide it on the other side.
【０００７】また、ブレ−キ押え８の駆動軸５に対する
相対回転を規制する規制手段は、遊転保持手段の係合突
起４４が係合する第１規制面２１ａと第２規制面２１ｂ
とを備え、遊転保持面２２は、前記第２規制面２１ｂに
連続して設けられていると共に、前記係合突起４４の第
２規制面２１ｂに対する対向面と前記第２規制面２１ｂ
との少なくとも一方に、遊転操作ハンドル４０の遊転操
作方向への回転時、前記係合突起４４を前記遊転保持面
２２に案内する傾斜状ガイド面４４ａを設けるのが好ま
しい。The restriction means for restricting the relative rotation of the brake retainer 8 with respect to the drive shaft 5 includes a first restriction surface 21a and a second restriction surface 21b with which the engagement protrusions 44 of the free-wheel holding means are engaged.
The idle holding surface 22 is provided continuously with the second restriction surface 21b, and the surface of the engagement protrusion 44 facing the second restriction surface 21b and the second restriction surface 21b.
It is preferable to provide an inclined guide surface 44a that guides the engaging projection 44 to the free rotation holding surface 22 when the free rotation operation handle 40 rotates in the free rotation operation direction.
【０００８】また、ブレーキ押え８と駆動部材１０との
間に、該駆動部材１０の駆動回転方向への回転時該駆動
部材１０をブレーキ押え８に対しフリー回転可能とし、
非駆動回転方向への回転時、前記駆動部材１０をブレー
キ押え８と一体回転可能とする一方向回転機構を設ける
と共に、該一方向回転機構は、前記ブレーキ押え８と駆
動部材１０との対向面の一方に進退可能に保持する係合
体８６と、前記駆動部材１０の非駆動回転方向への回転
時、前記係合体８６が係合する係合溝１９とから成り、
この係合溝１９が複数設けられているのが好ましい。Further, between the brake retainer 8 and the drive member 10, the drive member 10 can be freely rotated with respect to the brake retainer 8 when the drive member 10 rotates in the drive rotation direction.
A unidirectional rotation mechanism is provided which enables the drive member 10 to rotate integrally with the brake retainer 8 when rotating in the non-drive rotation direction, and the unidirectional rotation mechanism is provided on the opposing surface of the brake retainer 8 and the drive member 10. And an engaging groove 19 with which the engaging body 86 engages when the drive member 10 rotates in the non-drive rotation direction.
It is preferable that a plurality of the engaging grooves 19 are provided.
【０００９】[0009]
【作用】前記遊転操作ハンドル４０の非遊転操作時、前
記ブレーキ押え８を前記ブレーキ受け７に対して螺進及
び螺退させて前記メカニカルブレーキ９を作動させると
共に、前記調整部材１４により定格負荷を調整できる過
負荷防止機構１５も作動させることができる。また、前
記操作ハンドル４０の遊転操作時、該操作ハンドル４０
を前記ブレーキ押え８に対して相対回転させ、前記操作
ハンドル４０を前記調整部材１４に弾接させ、この弾接
によりブレ−キ押え８の前記駆動軸５に対する相対回転
を抑制し、前記ロードシーブ３の遊転状態を保持するこ
とにより前記ロードシーブ３を簡単に遊転させることが
できる。In the non-idling operation of the idling operation handle 40, the brake presser 8 is screwed into and out of the brake receiver 7 to operate the mechanical brake 9, and the adjusting member 14 is used to adjust the rating. The overload prevention mechanism 15 capable of adjusting the load can also be operated. In addition, when the operation handle 40 is rotated, the operation handle 40
Is relatively rotated with respect to the brake presser 8, the operation handle 40 is elastically contacted with the adjusting member 14, and this elastic contact suppresses relative rotation of the brake presser 8 with respect to the drive shaft 5, and the load sheave. By maintaining the idle state of 3, the load sheave 3 can be easily idle.
【００１０】従って、前記過負荷防止機構１５の作動に
より過負荷防止を行うことができながら、前記遊転操作
ハンドル４０により熟練を要することなく前記駆動軸５
を遊転状態に保持でき、しかも、前記調整部材１４を、
前記過負荷防止機構１５の定格負荷を調整する部材と、
前記駆動軸５を遊転状態に保持する部材として共用でき
るから、それだけ部品点数を少なくすることができる。Therefore, while the overload prevention mechanism 15 can be operated to prevent overload, the idle operation handle 40 does not require skill to drive the drive shaft 5.
Can be held in an idle state, and the adjusting member 14
A member for adjusting the rated load of the overload prevention mechanism 15,
Since the drive shaft 5 can be shared as a member for holding the drive shaft 5 in an idling state, the number of parts can be reduced accordingly.
【００１１】尚、前記駆動軸５の遊転時、前記操作ハン
ドル４０の前記突起４４は前記調整部材１４の前記遊転
保持面２２に弾接しているだけであるから、前記過負荷
防止機構１５が作動を始める定格負荷を変えることなく
前記駆動軸５を遊転状態に保持できるのであって、前記
調整部材１４を共用部品として用いることができるので
ある。It should be noted that, when the drive shaft 5 rotates freely, the protrusion 44 of the operation handle 40 is only in elastic contact with the free rotation holding surface 22 of the adjusting member 14, so that the overload prevention mechanism 15 is not provided. Since the drive shaft 5 can be held in the idling state without changing the rated load for starting the operation, the adjusting member 14 can be used as a common component.
【００１２】また、遊転保持手段を遊転保持面２２と係
合突起４４とにより構成する場合、この突起４４の遊転
保持面２２への弾接により所望の遊転保持力を得ること
ができ、適切な遊転保持制御が可能となる。When the idling holding means is composed of the idling holding surface 22 and the engaging protrusions 44, a desired idling holding force can be obtained by elastically contacting the idling holding surface 22 with the protrusions 44. Therefore, it is possible to appropriately control the idle rotation.
【００１３】その上、前記係合突起４４の第２規制面２
１ｂに対向する対向面と第２規制面２１ｂとの一方に前
記傾斜ガイド面４４ａを設けることにより、遊転操作
時、前記操作ハンドル４０を回転するだけで、該ハンド
ル４０を軸方向に引張って調整部材１４に対し離反する
位置に移動させる操作が必要でなくなり、それだけ遊転
操作を向上できるのである。In addition, the second restricting surface 2 of the engaging projection 44
By providing the inclined guide surface 44a on one of the facing surface facing 1b and the second restricting surface 21b, it is possible to pull the handle 40 in the axial direction only by rotating the operating handle 40 during idling operation. The operation for moving the adjusting member 14 to a position away from the adjusting member 14 is not necessary, and the idling operation can be improved accordingly.
【００１４】また、ブレーキ押え８と駆動部材１０との
間に、該駆動部材１０の駆動回転方向への回転時該駆動
部材１０をブレーキ押え８に対しフリー回転可能とし、
非駆動回転方向への回転時、前記駆動部材１０をブレー
キ押え８と一体回転可能とする一方向回転機構を設ける
と共に、該一方向回転機構は、前記ブレーキ押え８と駆
動部材１０との対向面の一方に進退可能に保持する係合
体８６と、前記駆動部材１０の非駆動回転方向への回転
時、前記係合体８６が係合する係合溝１９とから成り、
この係合溝１９が複数設けられている場合、前記駆動部
材１０の非駆動回転方向への回転、即ち逆回転により前
記ブレーキ押え８を逆回転させて捲下げや牽引解除を行
うとき、該駆動部材１０を一回転させるまでもなく僅か
な角度の回転で前記係合体８６が係合溝１９に係合する
ことができるから、それだけ速やかに捲下げや牽引解除
を開始することができる。Further, between the brake retainer 8 and the drive member 10, the drive member 10 can be freely rotated with respect to the brake retainer 8 when the drive member 10 rotates in the drive rotation direction.
A unidirectional rotation mechanism is provided which enables the drive member 10 to rotate integrally with the brake retainer 8 when rotating in the non-drive rotation direction, and the unidirectional rotation mechanism is provided on the opposing surface of the brake retainer 8 and the drive member 10. And an engaging groove 19 with which the engaging body 86 engages when the drive member 10 rotates in the non-drive rotation direction.
When a plurality of engagement grooves 19 are provided, when the drive member 10 is rotated in the non-drive rotation direction, that is, the reverse rotation is performed, the brake presser 8 is reversely rotated to unwind or pull the traction. Since the engaging body 86 can be engaged with the engaging groove 19 with a slight angle of rotation without rotating the member 10 once, lowering and pulling release can be started more quickly.
【００１５】[0015]
【実施例】図１に示したレバー式捲上牽引機は、所定間
隔を置いて対向状に配設された第１及び第２側板１、２
間に、ロードシーブ３をもつ筒軸４を回転自由に支持し
て、該筒軸４の中心孔に駆動軸５を相対回転可能に支持
すると共に、この駆動軸５の前記第２側板側突出端部と
前記ロードシーブ３との間に、複数の減速ギヤから成る
減速歯車機構６を介装し、該減速歯車機構６で前記駆動
軸５の回転動力を前記ロードシーブ３側に減速して伝達
するようにしている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The lever type hoisting and traction machine shown in FIG. 1 has first and second side plates 1 and 2 which are arranged facing each other at a predetermined interval.
In between, a cylinder shaft 4 having a load sheave 3 is rotatably supported, a drive shaft 5 is supported in a central hole of the cylinder shaft 4 so as to be relatively rotatable, and the drive shaft 5 projects toward the second side plate. A reduction gear mechanism 6 including a plurality of reduction gears is interposed between an end portion and the load sheave 3, and the reduction gear mechanism 6 reduces the rotational power of the drive shaft 5 to the load sheave 3 side. I am trying to communicate.
【００１６】また、前記駆動軸５の前記第１側板側突出
部には、ブレーキ受け７とブレーキ押え８とを螺合する
と共に、前記ブレーキ受け７のボス部外周に制動板９
１、９２と、制動爪９３が係合する制動用爪車９４とを
支持して、これら制動板９１、９２及び制動用爪車９４
とを前記ブレーキ受け７とブレーキ押え８との間に介在
させ、これら各部材によりメカニカルブレーキ９を構成
している。尚、前記ブレーキ受け７は前記駆動軸５に設
ける止めリング７１によりその軸方向移動を拘束されて
いる。A brake receiver 7 and a brake retainer 8 are screwed onto the first side plate side protrusion of the drive shaft 5, and a brake plate 9 is provided on the outer periphery of the boss of the brake receiver 7.
1, 92 and a braking claw wheel 94 with which the braking claw 93 engages, and these braking plates 91, 92 and the braking claw wheel 94 are supported.
Are interposed between the brake receiver 7 and the brake presser 8, and a mechanical brake 9 is constituted by these members. The brake receiver 7 is restrained from moving in the axial direction by a stop ring 71 provided on the drive shaft 5.
【００１７】また、前記ブレーキ押え８の外周部には、
後記するレバー３０の揺動操作で回転させる駆動部材１
０を一方向回転機構を介して支持し、前記ブレーキ押え
８と前記駆動部材１０との間に一対の摩擦板１１、１２
と弾性部材１３及び調整部材１４とから成る過負荷防止
機構１５を設けているのであって、前記ブレーキ押え８
には、一方の制動板９２に対向する押圧側面をもった大
径部８１と、この大径部８１に連続する中径部８２及び
小径部８３とを形成し、前記中径部８２の外周には前記
弾性部材１３の押圧力を受け止めて該押圧力を一方の前
記摩擦板１２全体に伝達する押え板１６の回り止め用の
凹溝８４を設けると共に、前記小径部８３には前記弾性
部材１３の押圧力を調整して前記過負荷防止機構１５が
作動を始める定格負荷を調整する前記調整部材１４を螺
着している。Further, on the outer peripheral portion of the brake presser 8,
A drive member 1 rotated by a swinging operation of a lever 30 described later.
0 via a one-way rotation mechanism, and a pair of friction plates 11 and 12 are provided between the brake presser 8 and the drive member 10.
An overload preventing mechanism 15 including an elastic member 13 and an adjusting member 14 is provided.
Has a large-diameter portion 81 having a pressing side surface facing one braking plate 92, and a medium-diameter portion 82 and a small-diameter portion 83 continuous with the large-diameter portion 81. Is provided with a groove 84 for preventing rotation of the holding plate 16 that receives the pressing force of the elastic member 13 and transmits the pressing force to the entire one friction plate 12, and the small diameter portion 83 has the elastic member The adjusting member 14 for adjusting the pressing force of 13 to adjust the rated load at which the overload preventing mechanism 15 starts to operate is screwed.
【００１８】また、前記駆動部材１０は、垂直部１０ａ
と後記する歯部３２をもった筒状部１０ｂとから成り、
半径方向中心部には前記調整部材１４に向かって開放す
る環状の凹入部１７を形成しており、該凹入部１７に一
方の前記摩擦板１２と前記押え板１６とを内装して、前
記弾性部材１３の押圧力が前記駆動部材１０に伝達する
ようにすると共に、該駆動部材１０を介して前記ブレー
キ押え８の前記大径部８１と前記駆動部材１０の垂直部
１０ｂとの間に介装する他方の摩擦板１１も押圧できる
ようにし、前記駆動軸５に定格負荷以上の荷重が作用す
るとき、前記駆動部材１０とブレーキ押え８とがスリッ
プにより相対回転できるようにして、過負荷を防止する
ようにしている。尚、前記押え板１６の内周面には内方
へ突出し、かつ、前記凹溝８４に挿嵌する突出部１８を
設け、前記押え板１６の軸方向移動を可能にしながら、
前記ブレーキ押え８に対する相対回転ができないように
している。The drive member 10 has a vertical portion 10a.
And a cylindrical portion 10b having a tooth portion 32 to be described later,
An annular recessed portion 17 that opens toward the adjustment member 14 is formed at the center in the radial direction, and one of the friction plate 12 and the pressing plate 16 on one side is housed in the recessed portion 17 to provide the elasticity. The pressing force of the member 13 is transmitted to the drive member 10, and is interposed between the large diameter portion 81 of the brake retainer 8 and the vertical portion 10b of the drive member 10 via the drive member 10. The other friction plate 11 can also be pressed so that when the load greater than the rated load is applied to the drive shaft 5, the drive member 10 and the brake retainer 8 can rotate relative to each other by slippage to prevent overload. I am trying to do it. In addition, the inner peripheral surface of the pressing plate 16 is provided with a protruding portion 18 that protrudes inward and is fitted into the recessed groove 84 to enable the pressing plate 16 to move in the axial direction.
Relative rotation with respect to the brake presser 8 is prohibited.
【００１９】また、一方向回転機構としては、図５に示
すように、前記ブレーキ押え８の中径部８２の外周面に
凹部８５を形成し、該凹部８５内に係合体８６をばね８
７を介して常時半径方向外側へ付勢するように保持する
一方、前記駆動部材１０の内周面に、前記係合体８６が
侵入可能で、周方向にクサビ状に延びる係合溝１９を複
数（図面では８箇所）形成して、前記駆動部材１０を、
図５に矢印で示す捲下げ方向に回転させたとき、前記駆
動部材１０とブレーキ押え８とが一体的に結合し、捲下
げ時に前記過負荷防止機構１５の伝達トルクよりも大き
い回転トルクを必要とする場合に対処できるようにして
いる。As the one-way rotating mechanism, as shown in FIG. 5, a concave portion 85 is formed on the outer peripheral surface of the medium diameter portion 82 of the brake presser 8, and the engaging body 86 is provided with the spring 8 in the concave portion 85.
7, while holding it so as to always urge it outward in the radial direction, the engaging member 86 can enter the inner peripheral surface of the drive member 10 and has a plurality of engaging grooves 19 extending in a wedge shape in the peripheral direction. (8 places in the drawing), and the drive member 10 is
When it is rotated in the lowering direction shown by the arrow in FIG. 5, the drive member 10 and the brake presser 8 are integrally connected, and a rotational torque larger than the transmission torque of the overload prevention mechanism 15 is required at the time of lowering. And if so, we can deal with it.
【００２０】また、前記レバー３０は、前記メカニカル
ブレーキ９の外周部を被覆するブレーキカバー３１の外
側部で前記駆動部材１０の径方向外方部に対応する位置
に設けられ、前記駆動部材１０における前記筒状部１０
ｂの外周部に設けた歯部３２に噛合可能な正逆転用爪を
備えた爪体３３と、該爪体３３を前記歯部３２に係脱操
作する操作部３４を備えているのであって、前記爪体３
３の切換えにより前記駆動部材１０を正転又は逆転でき
るようにしている。The lever 30 is provided at a position corresponding to the radially outer portion of the drive member 10 on the outer side of the brake cover 31 which covers the outer peripheral portion of the mechanical brake 9, and the lever 30 is provided in the drive member 10. The tubular portion 10
It is provided with a claw body 33 having a forward / reverse claw capable of meshing with a tooth part 32 provided on the outer peripheral part of b, and an operating part 34 for engaging and disengaging the claw body 33 with the tooth part 32. , The nail body 3
The drive member 10 can be rotated normally or reversely by switching 3 of the above.
【００２１】しかして、以上のように構成したレバー式
捲上牽引機において、前記駆動軸５の軸端部にストッパ
ー６０を設けて、該ストッパー６０と前記ブレーキ押え
８との間に、前記ブレーキ押え８側に突出する突起４４
をもち、前記駆動軸５に対し相対回転不能とした遊転操
作ハンドル４０を軸方向移動可能に介装して、該遊転操
作ハンドル４０を前記ブレーキ押え８側に付勢する一
方、前記調整部材１４に、前記遊転操作ハンドル４０の
非遊転操作時、前記ブレーキ押え８の前記駆動軸５に対
する所定角度以上の相対回転を規制して、所定角度内の
相対回転で前記ブレーキ押え８の前記ブレーキ受け７に
対する螺進及び螺退を可能にする回転規制手段と、前記
操作ハンドル４０の遊転操作時、前記突起４４先端面を
前記操作ハンドル４０の前記ブレーキ押え８側への付勢
により弾接し前記ブレーキ押え８の前記駆動軸５に対す
る相対回転を抑制して、前記ロードシーブ３の遊転状態
を保持する遊転保持手段とを設けたのである。In the lever type hoisting traction machine constructed as described above, a stopper 60 is provided at the shaft end of the drive shaft 5, and the brake is provided between the stopper 60 and the brake presser 8. Protrusion 44 protruding toward the presser foot 8 side
The idle operation handle 40, which is not rotatable relative to the drive shaft 5, is interposed so as to be movable in the axial direction, and the idle operation handle 40 is urged toward the brake presser 8 while the adjustment is performed. When the idling operation handle 40 is not idling operation, the member 14 restricts relative rotation of the brake retainer 8 with respect to the drive shaft 5 at a predetermined angle or more, and the relative rotation within the predetermined angle causes the brake retainer 8 to rotate. A rotation restricting means that allows the brake receiver 7 to be screwed forward and backward, and the tip end surface of the protrusion 44 is urged toward the brake retainer 8 side of the operation handle 40 during the idling operation of the operation handle 40. There is provided an idling holding means for holding the idling state of the load sheave 3 by elastically contacting and suppressing the relative rotation of the brake presser 8 with respect to the drive shaft 5.
【００２２】即ち、前記駆動軸５における前記ブレーキ
押え８の外方側にセレーション部５１を形成し、このセ
レーション部５１に、外周部に係合凹溝６１をもった大
径部６２と前記セレーション部５１に結合可能な筒状部
６３とをもった前記ストッパー６０をセレーション結合
し、ナット６４の締め付けにより該ストッパー６０を前
記駆動軸５に固定するのである。That is, a serration portion 51 is formed on the outer side of the brake retainer 8 on the drive shaft 5, and the serration portion 51 has a large diameter portion 62 having an engaging groove 61 on the outer peripheral portion and the serration portion. The stopper 60 having a cylindrical portion 63 that can be connected to the portion 51 is serrated and fixed by fastening the nut 64 to the drive shaft 5.
【００２３】また、前記筒状部６３に前記操作ハンドル
４０のボス部４１を、該ボス部４１に設けた嵌合孔４２
により嵌合して、前記操作ハンドル４０を前記駆動軸５
の軸方向移動可能で、かつ、回転可能にした状態で前記
ストッパー６０の大径部６２と駆動部材１０との間に介
装すると共に、前記操作ハンドル４０の周壁内周面には
軸方向に延びる凸条４３を設けて、この凸条４３を、図
４に示すように前記ストッパー６０の大径部６２の外周
部に設けた前記係合凹溝６１に係合させ、この係合によ
り前記操作ハンドル４０を前記駆動軸５に対し相対回転
不能にするのである。Further, the boss portion 41 of the operation handle 40 is attached to the tubular portion 63, and the fitting hole 42 formed in the boss portion 41.
By fitting the operating handle 40 with the drive shaft 5
Of the stopper 60 is interposed between the large diameter portion 62 of the stopper 60 and the driving member 10 in a state of being movable in the axial direction and rotatable. The extending ridge 43 is provided, and the ridge 43 is engaged with the engaging groove 61 provided on the outer peripheral portion of the large diameter portion 62 of the stopper 60 as shown in FIG. The operation handle 40 is made unable to rotate relative to the drive shaft 5.
【００２４】また、前記操作ハンドル４０のボス部４１
の外側面と該ボス４１に対向する前記ストッパー６０の
大径部６２の内側面との間には、これら各側面に接触す
るコイルスプリングから成る弾性押圧部材７０を設け
て、前記操作ハンドル４０を前記ストッパー６０から離
反させる方向、即ち、前記ブレーキ押え８側へ付勢する
と共に、前記ボス部４１の背面側における半径方向端部
に前記操作ハンドル４０の付勢方向に突出する前記突起
４４を対称状に一対設けるのである。Also, the boss portion 41 of the operation handle 40.
An elastic pressing member 70 composed of a coil spring that comes into contact with each of the side surfaces of the stopper 60 is provided between the outer side surface of the stopper 60 and the inner side surface of the large diameter portion 62 of the stopper 60 facing the boss 41. The protrusion 44 which is biased in the direction of moving away from the stopper 60, that is, the brake presser 8 side, and which is protruded in the biasing direction of the operation handle 40 at the rear end of the boss 41 in the radial direction is symmetrical. The pair is provided in a shape.
【００２５】更に、前記調整部材１４は、図３及び図７
に示したように、１８０度位相をずらせた対称位置に一
対の切欠部２１を設けて、この切欠部２１の周方向一側
面を第１規制面２１ａとし、他側面を２１ｂとして、前
記操作ハンドル４０の非遊転操作時には、前記突起４４
が前記切欠部２１内に位置し、前記第１及び第２規制面
２１ａ，２１ｂの範囲内での前記ブレ−キ押え８の駆動
軸５に対する相対回転が許容されるのであって、この状
態で、前記レバー３０を揺動操作するとき、前記駆動部
材１０は前記操作ハンドル４０に対して相対回転するこ
とができ、前記ブレーキ押え８の前記ブレーキ受け７に
対する螺進及び螺退が可能となり前記ブレ−キ押え８の
螺進による前記メカニカルブレーキ９の作動により前記
駆動部材１０の回転に追随して前記駆動軸５が回転でき
るようになり、荷物の捲上げ又は捲下げや牽引解除の操
作が可能となるのである。Further, the adjusting member 14 is shown in FIGS.
As shown in FIG. 5, a pair of notches 21 are provided at symmetrical positions with a phase shift of 180 degrees, and one side face in the circumferential direction of the notches 21 is a first regulation face 21a, and the other side face is 21b. When the non-idling operation of 40, the projection 44
Is located in the notch 21, and relative rotation of the brake presser 8 with respect to the drive shaft 5 within the range of the first and second restricting surfaces 21a and 21b is allowed. When the lever 30 is swung, the drive member 10 can rotate relative to the operation handle 40, and the brake presser 8 can be screwed forward and backward with respect to the brake receiver 7. -The drive shaft 5 can be rotated following the rotation of the drive member 10 by the operation of the mechanical brake 9 caused by the screwing of the presser foot 8, and the operation of hoisting or lowering the luggage or releasing the towing can be performed. It becomes.
【００２６】また、前記調整部材１４には、前記各切欠
部２１に対し図３矢印で示した正転方向側に、前記操作
ハンドル４０の操作時前記突起４４の先端面が弾接する
前記遊転保持面２２を前記第２規制面２１ｂに連続して
対称状に設け、前記操作ハンドル４０の操作により遊転
状態にできると共にこの遊転状態を保持できるようにす
るのである。即ち、前記駆動部材１０を前記レバー３０
の爪体３３を介して回転固定した状態で、前記操作ハン
ドル４０を前記ストッパー６０側へ引き出すと共に、前
記駆動部材１０に対して相対回転させることにより、前
記操作ハンドル４０は駆動部材１０に対し相対回転する
ことになり、この相対回転により前記駆動軸５が一体に
回転し、この駆動軸５に螺着する前記ブレーキ押え８が
前記ブレーキ受け７から螺退するのであり、この螺退に
より前記駆動軸５を遊転状態にできるのであって、この
とき、前記弾性押圧部材７０の付勢で前記突起４４の先
端面が、図２、３に示したように、前記遊転保持面２２
に弾接するから、この弾接により前記操作ハンドル４０
が前記ブレーキ押え８に対して相対回転するのを抑制で
き、この抑制により前記ロードシーブ３の遊転状態を保
持できるのである。Further, the adjusting member 14 has a free-wheeling structure in which the tip end surface of the protrusion 44 is elastically contacted when the operation handle 40 is operated in the forward rotation direction side shown by the arrow in FIG. The holding surface 22 is provided symmetrically continuously to the second restriction surface 21b so that the holding surface 22 can be brought into the idling state by the operation of the operation handle 40 and the idling state can be held. That is, the drive member 10 is connected to the lever 30.
The operating handle 40 is pulled out to the stopper 60 side and is rotated relative to the driving member 10 in a state where the operating handle 40 is rotationally fixed via the claw 33 of the operating member 40, so that the operating handle 40 moves relative to the driving member 10. The drive shaft 5 rotates integrally with this relative rotation, and the brake retainer 8 screwed to the drive shaft 5 is screwed back from the brake receiver 7. The shaft 5 can be brought into an idling state, and at this time, the tip end surface of the protrusion 44 is biased by the elastic pressing member 70 so that the idling holding surface 22 as shown in FIGS.
The operation handle 40 is contacted by the elastic contact.
Can be restrained from rotating relative to the brake presser 8, and this restraint can maintain the idling state of the load sheave 3.
【００２７】尚、図３において２３は、前記操作ハンド
ル４０を前記ブレーキ押え８及び駆動部材１０に対して
回転操作するとき、前記突起４４の当接により前記操作
ハンドル４０を必要以上に回転させるのを防止する回転
規制部である。In FIG. 3, reference numeral 23 indicates that when the operation handle 40 is rotated with respect to the brake retainer 8 and the drive member 10, the operation handle 40 is rotated more than necessary by the contact of the protrusion 44. This is a rotation restricting portion that prevents
【００２８】また、図５に示すように、前記駆動部材１
０の内周面には前記係合溝１９を４５度の等間隔で８箇
所又はそれ以上形成することにより、前記レバー３０の
操作による前記駆動部材１０の非駆動回転方向への回
転、即ち逆回転により前記ブレーキ押え８を逆回転させ
るとき、少なくとも４５度以内の回転で必ず前記係合体
８６が係合溝１９に係合でき、それだけ捲下げ及び牽引
解除を迅速に行うことができるのである。Further, as shown in FIG. 5, the driving member 1
By forming the engagement grooves 19 at eight locations or more at equal intervals of 45 degrees on the inner peripheral surface of 0, rotation of the drive member 10 in the non-drive rotation direction by the operation of the lever 30, that is, reverse rotation When the brake presser 8 is rotated in the reverse direction by rotation, the engagement body 86 can be surely engaged with the engagement groove 19 by the rotation within at least 45 degrees, and the lowering and the pulling release can be performed promptly.
【００２９】次に、以上のように構成したレバー式捲上
牽引機の作用について説明する。Next, the operation of the lever-type hoisting and traction machine constructed as described above will be described.
【００３０】先ず、捲上げや牽引を行う場合には、前記
操作レバー３０に設けた操作部３４の操作で前記爪体３
３の送り爪を前記駆動部材１０の歯部３２に係合させ
て、前記レバー３０の揺動操作を行うことにより、前記
ブレーキ押え８が前記駆動部材１０とともに正転方向に
回転されるのである。この場合前記突起４４は図３点線
で示したように前記切欠部２１に位置しているから、こ
の正回転時には、前記ブレーキ押え８が前記ブレーキ受
け７側へ螺進し、前記メカニカルブレーキ９が作動し
て、前記駆動部材１０の回転動力が前記過負荷防止機構
１５及びメカニカルブレーキ９を介して前記駆動軸５へ
伝達され、この回転動力が前記駆動軸５から前記減速歯
車機構６及び筒軸４を介して前記ロードシーブ３側に伝
達され、捲上げや牽引が可能となるのである。そしてこ
の状態で、前記ロードシーブ３に前記調整部材１４が調
整する定格負荷以上の荷重が作用した状態では、前記過
負荷防止機構１５がスリップ作動して定格以上の捲上げ
や牽引を規制できるのである。First, when hoisting or pulling, the claw body 3 is operated by operating the operation portion 34 provided on the operation lever 30.
The brake presser 8 is rotated in the forward rotation direction together with the drive member 10 by engaging the feed claw 3 of FIG. 3 with the tooth portion 32 of the drive member 10 and performing the swinging operation of the lever 30. .. In this case, since the protrusion 44 is located in the cutout portion 21 as shown by the dotted line in FIG. 3, during this forward rotation, the brake presser 8 is screwed toward the brake receiver 7 side, and the mechanical brake 9 is moved. Upon operation, the rotational power of the drive member 10 is transmitted to the drive shaft 5 via the overload prevention mechanism 15 and the mechanical brake 9, and this rotational power is transmitted from the drive shaft 5 to the reduction gear mechanism 6 and the cylinder shaft. It is transmitted to the load sheave 3 side via 4 and can be wound or pulled. In this state, when a load equal to or higher than the rated load adjusted by the adjusting member 14 is applied to the load sheave 3, the overload prevention mechanism 15 slips to regulate winding or towing above the rated value. is there.
【００３１】また、捲下げや牽引解除を行う場合には、
前記操作部３４における爪体３３の逆転用爪を前記駆動
部材１０の歯部３２に係合させて、前記レバー３０を揺
動操作することにより、前記ブレーキ押え８が前記駆動
部材１０とともに逆転方向に回転されるのであって、こ
の場合も前記突起４４は前記切欠部２１に位置している
から、前記ブレーキ押え８は前記駆動軸５に対して相対
回転して、前記ブレーキ受け７に対して螺退でき、前記
メカニカルブレーキ９の作動により前記駆動部材１０の
回転に追随して前記駆動軸５を所定角度回転させられる
のであり、この回転により捲下げや牽引解除が可能とな
るのである。When lowering or releasing the tow,
By engaging the reversing claw of the claw body 33 in the operating portion 34 with the tooth portion 32 of the driving member 10 and swinging the lever 30, the brake presser 8 and the driving member 10 rotate in the reverse direction. Also in this case, since the protrusion 44 is located in the cutout portion 21 in this case as well, the brake retainer 8 rotates relative to the drive shaft 5 and moves relative to the brake receiver 7. The drive shaft 5 can be screwed back and rotated, and the drive shaft 5 can be rotated by a predetermined angle following the rotation of the drive member 10 by the operation of the mechanical brake 9. By this rotation, the lowering and the pulling release can be performed.
【００３２】この場合、前記レバー３０の揺動操作によ
る前記駆動部材１０の非駆動回転方向への回転、即ち逆
回転により前記ブレーキ押え８を逆回転させるのである
が、図５に示したように、前記駆動部材１０の内周面に
４５度の等間隔で前記係合体８６が係合する前記係合溝
１９を複数設けているから、該駆動部材１０を一回転さ
せるまでもなく少なくとも４５度の角度の回転で前記係
合体８６を係合溝１９に係合させることができ、それだ
け速やかに捲下げや牽引解除を開始することができる。In this case, the brake retainer 8 is rotated in the reverse direction by the rotation of the drive member 10 in the non-drive rotation direction by the swinging operation of the lever 30, that is, the reverse rotation, as shown in FIG. Since the inner peripheral surface of the drive member 10 is provided with a plurality of engagement grooves 19 with which the engagement bodies 86 engage at equal intervals of 45 degrees, it is not necessary to rotate the drive member 10 at least 45 degrees. The engaging body 86 can be engaged with the engaging groove 19 by the rotation of the angle of, and the lowering and the pulling release can be started more quickly.
【００３３】次に、前記駆動軸５を遊転状態にして、前
記チェンの負荷側への自由な伸長や短縮を行う場合につ
いて説明する。Next, a case will be described in which the drive shaft 5 is allowed to freely rotate and the chain is freely extended or shortened toward the load side.
【００３４】先ず、前記爪体３３の逆転用爪を前記駆動
部材１０の前記歯部３２に係合させて、前記操作ハンド
ル４０の正転方向への回転時、前記駆動部材１０が前記
操作ハンドル４０と共回りできないようにする。そし
て、この状態で前記操作ハンドル４０を前記弾性押圧部
材７０に抗して前記ストッパー６０側へ引き出して、即
ち、前記操作ハンドル４０をブレーキ押え８に対しその
離反方向へ移動させ、前記操作ハンドル４０を正転方向
へ回転操作するのである。このとき、前記爪体３３の逆
転用爪が歯部３２に係止している前記駆動部材１０は正
転できないのに対し、前記ストッパー６０を介して前記
操作ハンドル４０とともに回転する前記駆動軸５は、正
転回転、即ち、前記ブレーキ押え８及び駆動部材１０に
対して正転方向で、かつ、前記切欠部２１の範囲以上に
相対回転でき、この相対回転で前記ブレーキ押え８を、
図１において前記ブレーキ受け７から離れる方向に軸方
向移動させ、前記メカニカルブレーキ９による制動作動
を解除することができ、前記駆動軸５、ひいてはロード
シーブ３を遊転状態にすることができるのである。そし
て、前記弾性押圧部材７０の付勢で前記突起４４の突出
先端面が、図２、３に示したように、前記遊転保持面２
２に弾接するのであって、この弾接により前記操作ハン
ドル４０が前記ブレーキ押え８及び駆動部材１０に対し
て相対回転するのを抑制できるから、前記ロードシーブ
３の遊転状態を保持することが可能となるのである。従
ってこの状態で前記チェンを負荷側に引張ることにより
迅速な伸長が行えるし、また、無負荷側に引張ることに
より負荷側のチェンの迅速な短縮が行えるのである。First, when the reversing claw of the claw body 33 is engaged with the tooth portion 32 of the driving member 10, the driving member 10 causes the operating handle 40 to rotate when the operating handle 40 rotates in the forward direction. Do not turn with 40. Then, in this state, the operation handle 40 is pulled out to the stopper 60 side against the elastic pressing member 70, that is, the operation handle 40 is moved in the separating direction with respect to the brake presser 8, and the operation handle 40 is moved. Is operated to rotate in the forward direction. At this time, the drive member 10 in which the reverse rotation claw of the claw body 33 is locked to the tooth portion 32 cannot rotate normally, whereas the drive shaft 5 that rotates together with the operation handle 40 through the stopper 60. Can rotate in the normal rotation direction, that is, in the normal rotation direction with respect to the brake presser 8 and the drive member 10 and beyond the range of the cutout portion 21, and the relative rotation causes the brake presser 8 to move.
In FIG. 1, the brake operation by the mechanical brake 9 can be released by axially moving in a direction away from the brake receiver 7, and the drive shaft 5, and by extension, the load sheave 3 can be put into an idle state. .. When the elastic pressing member 70 is urged, the protruding tip end surface of the protrusion 44 is, as shown in FIGS.
Since the operation handle 40 can be restrained from rotating relative to the brake retainer 8 and the drive member 10 by this elastic contact, the idle state of the load sheave 3 can be maintained. It will be possible. Therefore, in this state, pulling the chain toward the load side allows rapid extension, and pulling toward the unloaded side allows rapid shortening of the load side chain.
【００３５】尚、前記ロードシーブ３の遊転時、前記突
起４４が前記遊転保持面２２に弾接して前記調整部材１
４を軸方向に押圧しているだけであるから、前記突起４
４の押圧により前記調整部材１４が回転して軸方向に移
動することはなく、前記過負荷防止機構１５が作動を始
める定格荷重を変えることはないし、しかも、前記突起
４４の先端面の前記遊転保持面２２への弾接部を介して
回転トルクが前記調整部材１４へ伝達されようとして
も、前記弾性部材１３で軸方向移動が拘束されている前
記調整部材１４の回転抵抗は、前記突起４４が前記遊転
保持面２２に弾接することによる回転抵抗より大きいか
ら、前記弾接部を介して伝達される回転トルクによって
前記調整部材１４が回転することはない。従って、前記
調整部材１４により予め調節した前記過負荷防止機構１
５が作動を始める定格荷重が変わることはない。この結
果、前記調整部材１４を、前記過負荷防止機構１５の定
格負荷を調整する部材と、前記ロードシーブ３を遊転状
態に保持する部材との共用部品として用いることができ
るのである。During the idling of the load sheave 3, the protrusion 44 makes elastic contact with the idling holding surface 22 and the adjusting member 1
4 is only pressed in the axial direction, the projection 4
The pressing member 4 does not rotate the adjustment member 14 to move it in the axial direction, does not change the rated load at which the overload prevention mechanism 15 starts operating, and further, the free end surface of the protrusion 44 does not move. Even if the rotational torque is transmitted to the adjusting member 14 through the elastic contact portion with the rolling holding surface 22, the rotational resistance of the adjusting member 14 whose axial movement is restricted by the elastic member 13 is equal to the protrusion. Since 44 is larger than the rotation resistance due to elastic contact with the free rotation holding surface 22, the adjusting member 14 is not rotated by the rotation torque transmitted through the elastic contact portion. Therefore, the overload prevention mechanism 1 previously adjusted by the adjusting member 14
The rated load at which 5 starts operating does not change. As a result, the adjusting member 14 can be used as a common component for a member that adjusts the rated load of the overload prevention mechanism 15 and a member that holds the load sheave 3 in an idle state.
【００３６】また、前記調整部材１４には前記回転規制
部２３を設けているから、前記遊転保持面２２に前記突
起４４の先端面が弾接した状態で前記ブレーキ押え８が
前記駆動部材１０とともに前記駆動軸５に対して相対回
転するとき、前記突起４４の前記回転規制部２３への回
転方向における当接によりそれ以上の回転を規制するこ
とができる。従って、前記ロードシーブ３を遊転させる
ために前記操作ハンドル４０を前記ブレーキ押え８及び
駆動部材１０に対して相対回転させるとき、前記回転規
制部２３に対する前記突起４４の回転方向前部の当接に
よりその回転角度を制限することができ、前記ブレーキ
押え８とブレーキ受け７との間隔を、前記ロードシーブ
３が遊転するのに必要な間隔より必要以上に広がらない
ようにできる。この結果、前記操作ハンドル４０をブレ
ーキ押え８及び前記駆動部材１０に対して相対回転させ
る遊転操作時、前記操作ハンドル４０を必要以上回転さ
せることなく遊転操作が行えるのである。Further, since the adjusting member 14 is provided with the rotation restricting portion 23, the brake presser 8 is moved by the drive member 10 with the tip end surface of the protrusion 44 elastically contacting the idle holding surface 22. At the same time, when rotating relative to the drive shaft 5, the rotation of the protrusion 44 against the rotation restricting portion 23 in the rotating direction can be restricted. Therefore, when the operation handle 40 is rotated relative to the brake retainer 8 and the drive member 10 in order to allow the load sheave 3 to rotate freely, the front of the rotation direction of the protrusion 44 contacts the rotation restricting portion 23. Thus, the rotation angle can be limited, and the distance between the brake presser 8 and the brake receiver 7 can be prevented from becoming wider than necessary for the load sheave 3 to rotate freely. As a result, during the idling operation of rotating the operation handle 40 relative to the brake presser 8 and the drive member 10, the idling operation can be performed without rotating the operation handle 40 more than necessary.
【００３７】更に、以上のように前記ロードシーブ３を
遊転状態に保持して、前記チェンの引張り力を強くし、
前記駆動軸５に逆転方向の強い力を作用させるときは、
前記突起４４の先端面の前記遊転保持面２２に対する弾
接が解除されて、前記突起４４が前記切欠部２１に戻っ
て、前記メカニカルブレーキ９が作動できる状態に戻る
のである。即ち、遊転状態において前記ロードシーブ３
に逆転方向の強い力が作用すると、前記ブレーキ押え８
は前記駆動軸５に螺着され、かつ、その回転慣性力は前
記駆動軸５に比較して大きいから、前記操作ハンドル４
０の回転に対して少し遅れて回転を始めることになり、
前記遊転保持面２２に対して前記突起４４が回転方向に
滑り、この結果、前記突起４４の突出先端面と前記遊転
保持面２２と弾接が解除されて、前記突起４４が図３点
線で示したように前記切欠部２１内に戻るのである。Further, as described above, the load sheave 3 is held in an idle state to increase the tensile force of the chain,
When a strong force in the reverse direction is applied to the drive shaft 5,
The elastic contact of the tip end surface of the projection 44 with the free rotation holding surface 22 is released, the projection 44 returns to the notch 21, and the mechanical brake 9 is ready to operate. That is, in the idle state, the load sheave 3
When a strong force in the reverse direction acts on the brake presser 8
Is screwed to the drive shaft 5, and its rotational inertial force is larger than that of the drive shaft 5, so that the operating handle 4
The rotation starts a little after the 0 rotation,
The protrusion 44 slides in the rotational direction with respect to the idle holding surface 22, and as a result, the projecting tip end surface of the protrusion 44 and the idle holding surface 22 are released from elastic contact with each other so that the protrusion 44 is shown by a dotted line in FIG. It returns to the inside of the cutout portion 21 as shown in FIG.
【００３８】尚、この場合、前記操作ハンドル４０は前
記突起４４の先端面の前記遊転保持面２２に対する弾接
による相対回転抵抗に打ち勝って、前記ブレーキ押え８
及び駆動部材１０に対して逆回転方向に相対回転するの
であって、前記突起４４の弾接による相対回転抵抗によ
り遊転時におけるチェンの引張り力の入力範囲を広げら
れ、遊転操作を熟練を要することなく行えるのである。In this case, the operation handle 40 overcomes the relative rotational resistance due to the elastic contact of the tip end surface of the projection 44 with the idle holding surface 22, and the brake presser 8
In addition, the rotation of the drive member 10 in the reverse rotation direction is relatively wide, and the relative rotational resistance due to the elastic contact of the protrusions 44 widens the input range of the chain pulling force during idling, thus improving the skill of idling operation. It can be done without any need.
【００３９】また、前記チェンに作用する荷重により前
記ロードシーブ３から駆動軸５に逆転方向の負荷が作用
しているとき、前記操作ハンドル４０による遊転操作を
行うと、前記負荷により、前記操作ハンドル４０は前記
駆動軸５とともに前記ブレーキ押え８に対して逆回転方
向に相対回転し、前記突起４４の先端面と前記遊転保持
面２２に対する弾接が直ちに解除され前記メカニカルブ
レーキ９が制動できる状態に戻ることになり、前記駆動
軸５を遊転状態に保持することができないことからその
安全性も高められるのである。When the load acting in the reverse direction is applied to the drive shaft 5 from the load sheave 3 by the load acting on the chain, when the idling operation is performed by the operation handle 40, the operation is performed by the load. The handle 40 rotates together with the drive shaft 5 in the reverse rotation direction with respect to the brake retainer 8, and the elastic contact between the tip end surface of the protrusion 44 and the free rotation holding surface 22 is immediately released, so that the mechanical brake 9 can be braked. As a result, the drive shaft 5 cannot be held in the idling state, so that the safety thereof can be improved.
【００４０】以上のように、前記遊転操作ハンドル４０
の非遊転操作時には、前記ブレーキ押え８を前記ブレー
キ受け７に対して螺進及び螺退させて前記メカニカルブ
レーキ９を作動させ荷物の捲上げ捲下げや、牽引、牽引
解除の動作が行えると共に、このとき前記過負荷防止機
構１５も作動させることができるのであり、しかも、前
記操作ハンドル４０の遊転操作時には、該操作ハンドル
４０を前記ブレーキ押え８に対して相対回転させ、前記
操作ハンドル４０の突起４４を前記遊転保持面２２に弾
接させて前記駆動軸５の遊転状態を簡単に保持すること
により前記ロードシーブ３を遊転させることもできる。As described above, the idling operation handle 40
In the non-idling operation, the brake presser 8 is screwed and retracted with respect to the brake receiver 7 to operate the mechanical brake 9 to perform the operation of hoisting and lowering the luggage, pulling, and releasing the tow. At this time, the overload prevention mechanism 15 can also be operated, and when the operation handle 40 is idling, the operation handle 40 is relatively rotated with respect to the brake presser 8, and the operation handle 40 is operated. The load sheave 3 can be idled by elastically contacting the protrusion 44 with the idle holding surface 22 to easily hold the idle state of the drive shaft 5.
【００４１】従って、前記過負荷防止機構１５の作動に
より過負荷防止を行うことができながら、前記遊転操作
ハンドル４０により熟練を要することなく前記駆動軸５
を遊転状態に保持できるのであり、しかも、前記第１及
び第２規制面２１ａ，２１ｂをもった切欠部２１と前記
遊転保持面２２とを設けた前記調整部材１４を、前記過
負荷防止機構１５の定格負荷を調整する部品として用い
るだけでなく、前記駆動軸５を遊転状態に保持するため
の部品としても共用できるから、それだけ部品点数を少
なくすることができる。Therefore, while the overload prevention mechanism 15 can be operated to prevent overload, the idle operation handle 40 does not require any skill to drive the drive shaft 5.
Can be held in an idling state, and further, the adjusting member 14 provided with the notch portion 21 having the first and second regulating surfaces 21a and 21b and the idling holding surface 22 can prevent the overload. Since it can be used not only as a component for adjusting the rated load of the mechanism 15 but also as a component for holding the drive shaft 5 in an idle state, the number of components can be reduced accordingly.
【００４２】尚、以上の実施例では、前記係合凹溝６１
と前記凸条４３との係合により前記操作ハンドル４０を
前記駆動軸５に対して回転固定にしたが、前記ストッパ
ー６０の前記筒状部６３の外周面にセレーションを設け
て、前記操作ハンドル４０のボス部４１をセレーション
結合させてもよい。また、前記セレーション部５１に結
合可能な筒状部６３と大径部６２とをもったストッパー
６０を用いたが、前記筒状部６３を前記大径部６２と別
に形成してもよいし、更に、この場合、この筒状部６３
を短い二つのスリーブから構成し、前記ブレーキ押え８
側に配置するスリーブの前記ストッパー６０側端部に鍔
を設け、該鍔に前記操作ハンドル４０のボス部４１を当
接させるようにしてもよい。In the above embodiment, the engaging groove 61 is formed.
The operation handle 40 is rotationally fixed to the drive shaft 5 by the engagement between the operation handle 40 and the protrusion 43, but the operation handle 40 is provided with serrations on the outer peripheral surface of the cylindrical portion 63 of the stopper 60. The boss portion 41 may be serrated. Further, although the stopper 60 having the cylindrical portion 63 that can be coupled to the serration portion 51 and the large diameter portion 62 is used, the cylindrical portion 63 may be formed separately from the large diameter portion 62, Further, in this case, the tubular portion 63
Is composed of two short sleeves, and the brake presser 8
A flange may be provided at an end of the sleeve disposed on the side closer to the stopper 60, and the boss portion 41 of the operation handle 40 may be brought into contact with the flange.
【００４３】また、図５に示したように、前記ブレーキ
押え８の中径部８２に設けた凹部８５に前記係合体８６
を保持して、前記駆動部材１０の内周面に設けた前記係
合溝１９に係合するようにしたが、前記係合体８６を前
記駆動部材１０側に保持して、前記中径部８２の外周面
に設ける係合溝に係合するようにしてもよい。Further, as shown in FIG. 5, the engaging body 86 is inserted into the concave portion 85 provided in the medium diameter portion 82 of the brake presser 8.
Is held so as to engage with the engaging groove 19 provided on the inner peripheral surface of the driving member 10, but the engaging body 86 is held on the driving member 10 side, and the medium diameter portion 82 is held. You may make it engage with the engaging groove provided in the outer peripheral surface.
【００４４】以上説明した実施例は、前記操作ハンドル
４０により遊転操作する場合、先ず前記操作ハンドル４
０を軸方向外方に引出した後、回転させて前記係合突起
４４を遊転保持面２２に弾接するようにしたが、図６及
び図８に示したように、前記係合突起４４の第２規制面
２１ｂに対する対向面に、前記操作ハンドル４０の遊転
保持面２２に案内する傾斜状ガイド面４４ａを形成する
ことにより、前記操作ハンドル４０を軸方向外方に引き
出す操作をしなくとも、回転させるだけで前記調整部材
１４に対し離反する位置に移動させて前記係合突起４４
を遊転保持面２２に案内させられるのである。In the embodiment described above, when the idle operation is performed by the operation handle 40, first, the operation handle 4 is moved.
Although 0 was pulled out in the axial direction and then rotated so that the engagement protrusion 44 is elastically contacted with the idling holding surface 22, as shown in FIGS. 6 and 8, as shown in FIGS. By forming an inclined guide surface 44a that guides the free rotation holding surface 22 of the operation handle 40 on the surface facing the second restriction surface 21b, it is possible to pull out the operation handle 40 axially outward. , The engaging projection 44 is moved to a position away from the adjusting member 14 only by rotating.
Is guided to the idle holding surface 22.
【００４５】従って、操作ハンドル４０を軸方向外方に
引き出す操作が必要でなくなり、それだけ遊転操作時の
操作性を向上できるのである。Therefore, the operation of pulling the operation handle 40 outward in the axial direction is not necessary, and the operability in the idling operation can be improved accordingly.
【００４６】また、以上説明した実施例は、前記係合突
起４４を前記操作ハンドル４０の調整部材１４への対向
面に突設し、前記調整部材１４に前記第１及び第２規制
面２１ａ，２１ｂをもった切欠部２１を設けると共に前
記操作ハンドル４０との対向面に前記第２規制面２１ｂ
に連続する遊転保持面２２を設けたが、前記係合突起３
１を前記調整部材１４に設け、前記第１及び第２規制面
２１ａ，２１ｂ及び遊転保持面２２を前記操作ハンドル
４０に設けてもよい。In the embodiment described above, the engaging projection 44 is provided on the surface of the operating handle 40 facing the adjusting member 14, and the adjusting member 14 is provided with the first and second restricting surfaces 21a, 21a. 21b is provided, and the second restricting surface 21b is provided on the surface facing the operation handle 40.
The idling holding surface 22 continuous with the engaging projection 3 is provided.
1 may be provided on the adjusting member 14, and the first and second regulating surfaces 21a and 21b and the idling holding surface 22 may be provided on the operation handle 40.
【００４７】更に、前記傾斜状ガイド面を設ける場合、
前記係合突起４４に設ける以外、前記第２規制面２１ｂ
に設けてもよいし、双方に設けてもよい。Furthermore, when the inclined guide surface is provided,
The second restricting surface 21b other than that provided on the engaging protrusion 44
It may be provided on both sides or both sides.
【００４８】[0048]
【発明の効果】以上説明したように、本発明に係る捲上
牽引機では、ロードシーブ３を駆動する駆動軸５の周り
に装着するメカニカルブレーキ９及び該メカニカルブレ
ーキ９のブレーキ押え８と、該ブレーキ押え８の外周部
に支持する駆動部材１０との間に、摩擦板１１、１２と
弾性部材１３及び調整部材１４とを備えた過負荷防止機
構１５を設けた捲上牽引機において、前記駆動軸５の軸
端部にストッパー６０を設けて、該ストッパー６０と前
記ブレーキ押え８との間に、前記駆動軸５に対し相対回
転不能とした遊転操作ハンドル４０を軸方向移動可能に
介装して、該遊転操作ハンドル４０を前記ブレーキ押え
８側に付勢する一方、前記調整部材１４と、前記操作ハ
ンドル４０との間に、前記操作ハンドル４０の非遊転操
作時、前記ブレーキ押え８の前記駆動軸５に対する所定
角度以上の相対回転を規制し、所定角度内の相対回転で
前記ブレーキ押え８のブレーキ受け７に対する螺進及び
螺退を可能にする回転規制手段と、前記操作ハンドル４
０の遊転操作時、前記操作ハンドル４０の前記ブレーキ
押え８側への付勢により前記操作ハンドル４０を前記調
整部材１４に弾接し前記ブレーキ押え８の前記駆動軸５
に対する相対回転を抑制して、前記ロードシーブ３の遊
転状態を保持する遊転保持手段とを設けたから、前記遊
転操作ハンドル４０の非遊転操作時には、前記ブレーキ
押え８を前記ブレーキ受け７に対して螺進及び螺退させ
て前記メカニカルブレーキ９を作動させ荷物の捲上げ捲
下げや、牽引、牽引解除の動作が行えると共に、このと
き前記過負荷防止機構１５も作動させることができるの
であり、しかも、前記操作ハンドル４０の遊転操作時、
該操作ハンドル４０を前記ブレーキ押え８に対して相対
回転させ、前記操作ハンドル４０を前記調整部材１４に
弾接させて前記駆動軸５の遊転状態を保持することによ
り前記ロードシーブ３を遊転させることもできる。As described above, in the hoisting and traction machine according to the present invention, the mechanical brake 9 mounted around the drive shaft 5 for driving the load sheave 3, the brake presser 8 of the mechanical brake 9, and the mechanical brake 9 are provided. In the hoisting and traction machine, an overload preventing mechanism 15 provided with friction plates 11 and 12, an elastic member 13 and an adjusting member 14 is provided between a drive member 10 supported on the outer peripheral portion of the brake presser 8 and the drive member 10. A stopper 60 is provided at the shaft end of the shaft 5, and an idling operation handle 40, which cannot rotate relative to the drive shaft 5, is interposed between the stopper 60 and the brake retainer 8 so as to be movable in the axial direction. Then, while the idling operation handle 40 is biased toward the brake presser 8 side, between the adjusting member 14 and the operating handle 40, the non-idle operation of the operating handle 40 causes the brake to move. Rotation restricting means for restricting relative rotation of the presser foot 8 with respect to the drive shaft 5 at a predetermined angle or more, and allowing the brake presser 8 to be screwed into and out of the brake receiver 7 with relative rotation within a predetermined angle; Handle 4
At the time of idling operation of 0, the operation handle 40 is elastically brought into contact with the adjusting member 14 by urging the operation handle 40 toward the brake retainer 8 side, and the drive shaft 5 of the brake retainer 8
Since a relative rotation means for suppressing the relative rotation with respect to the load sheave 3 is provided for holding the idle state of the load sheave 3, the brake presser 8 and the brake receiver 7 are operated when the idle operation handle 40 is not idle. On the other hand, the mechanical brake 9 is actuated by being screwed and unwound to actuate the operation of hoisting and lowering the luggage, towing and releasing the towing, and at the same time operating the overload prevention mechanism 15. Yes, and in addition, during the idling operation of the operation handle 40,
The operation handle 40 is rotated relative to the brake presser 8, and the operation handle 40 is elastically brought into contact with the adjusting member 14 to maintain the idle state of the drive shaft 5 to idle the load sheave 3. You can also let it.
【００４９】従って、前記過負荷防止機構１５の作動に
より過負荷防止を行うことができながら、前記遊転操作
ハンドル４０により熟練を要することなく前記ロードシ
ーブ３を遊転状態に保持できるのであり、しかも、前記
調整部材１４を、前記過負荷防止機構１５の定格負荷を
調整する部品として用いるだけでなく、前記ロードシー
ブ３を遊転状態に保持するための部品としても共用でき
るから、それだけ部品点数を少なくすることができる。Therefore, while the overload can be prevented by operating the overload prevention mechanism 15, the load sheave 3 can be held in the idle state by the idle operation handle 40 without requiring skill. Moreover, since the adjusting member 14 can be used not only as a component for adjusting the rated load of the overload prevention mechanism 15 but also as a component for holding the load sheave 3 in an idle state, the number of components can be increased accordingly. Can be reduced.
【００５０】また、遊転保持手段を遊転保持面２２と係
合突起４４とにより構成する場合、この突起４４の遊転
保持面２２への弾接により所望の遊転保持力を得ること
ができ、適切な遊転保持制御が可能となる。Further, when the idling holding means is constituted by the idling holding surface 22 and the engaging projection 44, the desired idling holding force can be obtained by elastically contacting the projection 44 with the idling holding surface 22. Therefore, it is possible to appropriately control the idle rotation.
【００５１】その上、前記係合突起４４の第２規制面２
１ｂに対向する対向面と第２規制面２１ｂとの一方に前
記傾斜ガイド面４４ａを設けることにより、遊転操作
時、前記操作ハンドル４０を回転するだけで該ハンドル
４０を軸方向に引張って調整部材１４に対し離反する位
置に移動させる操作が必要でなくなり、それだけ遊転操
作を向上できるのである。In addition, the second restricting surface 2 of the engaging projection 44
By providing the inclined guide surface 44a on one of the facing surface facing 1b and the second restricting surface 21b, it is possible to adjust the handle 40 by pulling the handle 40 in the axial direction only by rotating the handle 40 during idling operation. The operation for moving the member 14 to a position away from the member 14 is not necessary, and the idling operation can be improved accordingly.
【００５２】また、ブレーキ押え８と駆動部材１０との
間に、該駆動部材１０の駆動回転方向への回転時該駆動
部材１０をブレーキ押え８に対しフリー回転可能とし、
非駆動回転方向への回転時、前記駆動部材１０をブレー
キ押え８と一体回転可能とする一方向回転機構を設ける
ことにより、前記駆動部材１０の非駆動回転方向への回
転、即ち逆回転により前記ブレーキ押え８を逆回転させ
て捲下げや牽引解除を行うとき、該駆動部材１０を一回
転させるまでもなく僅かな角度の回転で前記係合体８６
が係合溝１９に係合することができるから、それだけ速
やかに捲下げや牽引解除を開始することができる。Between the brake retainer 8 and the drive member 10, the drive member 10 can be freely rotated with respect to the brake retainer 8 when the drive member 10 rotates in the drive rotation direction.
By providing a one-way rotation mechanism that enables the drive member 10 to rotate integrally with the brake presser 8 when rotating in the non-drive rotation direction, the drive member 10 rotates in the non-drive rotation direction, that is, reverse rotation, When the brake presser 8 is reversely rotated to lower or lower the tow, the engaging member 86 is rotated by a slight angle without rotating the drive member 10 once.
Can be engaged with the engagement groove 19, so that the lowering and the pulling release can be started more quickly.
【図１】本発明の一実施例を示すレバー式捲上牽引機の
縦断側面である。FIG. 1 is a longitudinal side view of a lever-type hoisting and traction machine showing an embodiment of the present invention.
【図２】遊転状態を示す要部断面図である。FIG. 2 is a sectional view of an essential part showing a free rotation state.
【図３】図２のＡ−Ａ線断面図である。3 is a cross-sectional view taken along the line AA of FIG.
【図４】遊転操作ハンドルとストッパーとの係合を示す
説明図である。FIG. 4 is an explanatory view showing the engagement between the idling operation handle and the stopper.
【図５】一方向回転駆動機構の説明図である。FIG. 5 is an explanatory diagram of a one-way rotation drive mechanism.
【図６】係合突起を変更した操作ハンドルの他側を示す
もので、調整部材との対向面からみた内面図。FIG. 6 is a view showing the other side of the operation handle in which the engagement protrusion is changed, and is an inner view seen from the surface facing the adjustment member.
【図７】調整部材のみの正面図。FIG. 7 is a front view of only an adjusting member.
【図８】図６に示した操作ハンドルの係合突起が遊転保
持面に案内される作用を示す説明図。8 is an explanatory view showing the action of the engagement protrusion of the operation handle shown in FIG. 6 being guided by the free rotation holding surface.
【図９】従来例を示す断面図である。FIG. 9 is a cross-sectional view showing a conventional example.
３ ロードシーブ ５ 駆動軸 ７ ブレーキ受け ８ ブレーキ押え ９ メカニカルブレーキ １０ 駆動部材 １１，１２ 摩擦板 １３ 弾性部材 １４ 調整部材 １５ 過負荷防止機構 １９ 係合溝 ２１ａ 第１規制面 ２１ｂ 第２規制面 ２２ 遊転保持面 ４０ 遊転操作ハンドル ４４ 係合突起 ４４ａ 傾斜ガイド面 ６０ ストッパー ８６ 係合体 3 load sheave 5 drive shaft 7 brake receiver 8 brake retainer 9 mechanical brake 10 drive member 11, 12 friction plate 13 elastic member 14 adjusting member 15 overload prevention mechanism 19 engaging groove 21a first restricting surface 21b second restricting surface 22 free Roll holding surface 40 Idling operation handle 44 Engagement protrusion 44a Inclined guide surface 60 Stopper 86 Engagement body
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成４年１２月２日[Submission date] December 2, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１６[Correction target item name] 0016
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１６】また、前記駆動軸５の前記第１側板側突出
部には、ブレーキ受け７とブレーキ押え８とを螺合する
と共に、前記ブレーキ受け７のボス部外周に制動板９
１、９２と、制動爪９３が係合する制動用爪車９４とを
支持して、これら制動板９１、９２及び制動用爪車９４
とを前記ブレーキ受け７とブレーキ押え８との間に介在
させ、これら各部材によりメカニカルブレーキ９を構成
している。尚、前記ブレーキ受け７は前記駆動軸５に設
ける止めリング７１によりその軸方向移動を拘束されて
いる。また、止めリング７１の代りにコイルスプリング
を用いてもよいし、コッターピンの打込みにより軸方向
移動を拘束してもよい。 A brake receiver 7 and a brake retainer 8 are screwed onto the first side plate side protrusion of the drive shaft 5, and a brake plate 9 is provided on the outer periphery of the boss of the brake receiver 7.
1, 92 and a braking claw wheel 94 with which the braking claw 93 engages, and these braking plates 91, 92 and the braking claw wheel 94 are supported.
Are interposed between the brake receiver 7 and the brake presser 8, and a mechanical brake 9 is constituted by these members. The brake receiver 7 is restrained from moving in the axial direction by a stop ring 71 provided on the drive shaft 5. A coil spring is used instead of the stop ring 71.
May be used or the cotter pin can be driven in the axial direction.
Movement may be restricted.
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１７[Correction target item name] 0017
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１７】また、前記ブレーキ押え８の外周部には、
後記するレバー３０の揺動操作で回転させる駆動部材１
０をー方向回転機構を介して支持し、前記ブレーキ押え
８と前記駆動部材１０との間に一対の摩擦板１１、１２
と弾性部材１３及び過負荷設定調整部材１４とから成る
過負荷防止機構１５を設けているのであって、前記ブレ
ーキ押え８には、一方の制動板９２に対向する押圧側面
をもった大径部８１と、この大径部８１に連続する中径
部８２及び小径部８３とを形成し、前記中径部８２の外
周には前記弾性部材１３の押圧力を受け止めて該押圧力
を一方の前記摩擦板１２の全体に伝達する押え板１６の
回り止め用の凹溝８４を設けると共に、前記小径部８３
には前記弾性部材１３の押圧力を調整して前記過負荷防
止機構１５が作動を始める定格負荷を調整する前記調整
部材１４を螺着している。この場合、前記調整部材１４
は、螺着のみでもよいが、一般に過負荷防止装置に用い
られている回り止めワッシャを用いたり、ロックナット
を用いてもよい。また、図に示した実施例では、前記摩
擦板１２及び押え板１６はそれぞれ１枚ずつ設けている
が、その他複数枚ずつ設けてもよい。 Further, on the outer peripheral portion of the brake presser 8,
A drive member 1 rotated by a swinging operation of a lever 30 described later.
0 is supported via a negative direction rotation mechanism, and a pair of friction plates 11 and 12 are provided between the brake presser 8 and the drive member 10.
Since the overload prevention mechanism 15 including the elastic member 13 and the overload setting adjusting member 14 is provided, the brake presser 8 has a large diameter portion having a pressing side surface facing one braking plate 92. 81 and a medium-diameter portion 82 and a small-diameter portion 83 that are continuous with the large-diameter portion 81 are formed. The outer peripheral surface of the medium-diameter portion 82 receives the pressing force of the elastic member 13 and applies the pressing force to one of the two. A groove 84 for preventing rotation of the pressing plate 16 that transmits to the entire friction plate 12 is provided, and the small diameter portion 83 is provided.
The adjusting member 14 that adjusts the pressing force of the elastic member 13 to adjust the rated load at which the overload prevention mechanism 15 starts to operate is screwed on. In this case, the adjusting member 14
May be screwed only, but is generally used for overload prevention devices.
Use a lock washer that is used, or use a lock nut.
May be used. In the embodiment shown in the figure,
One rubbing plate 12 and one pressing plate 16 are provided.
However, a plurality of other sheets may be provided.
Claims (4)
りに装着するメカニカルブレーキ９及び該メカニカルブ
レーキ９のブレーキ押え８と、該ブレーキ押え８の外周
部に支持する駆動部材１０との間に、摩擦板１１、１２
と弾性部材１３及び調整部材１４とを備えた過負荷防止
機構１５を設けた捲上牽引機であって、前記駆動軸５の
軸端部にストッパー６０を設けて、該ストッパー６０と
前記ブレーキ押え８との間に、前記駆動軸５に対し相対
回転不能とした遊転操作ハンドル４０を軸方向移動可能
に介装して、該遊転操作ハンドル４０を前記ブレーキ押
え８側に付勢する一方、前記調整部材１４と前記操作ハ
ンドル４０との間に、前記操作ハンドル４０の非遊転操
作時、前記ブレーキ押え８の前記駆動軸５に対する所定
角度以上の相対回転を規制し、所定角度内の相対回転で
前記ブレーキ押え８のブレーキ受け７に対する螺進及び
螺退を可能にする回転規制手段と、前記操作ハンドル４
０の遊転操作時、該操作ハンドル４０の前記ブレーキ押
え８側への付勢により前記操作ハンドル４０を前記調整
部材１４に弾接し前記ブレーキ押え８の前記駆動軸５に
対する相対回転を抑制して、前記ロードシーブ３の遊転
状態を保持する遊転保持手段とを設けたことを特徴とす
る捲上牽引機。1. A mechanical brake 9 mounted around a drive shaft 5 for driving a load sheave 3, a brake presser 8 of the mechanical brake 9, and a drive member 10 supported on an outer peripheral portion of the brake presser 8. , Friction plates 11, 12
A hoisting traction machine provided with an overload prevention mechanism 15 including an elastic member 13 and an adjusting member 14, wherein a stopper 60 is provided at the shaft end of the drive shaft 5, and the stopper 60 and the brake presser are provided. 8, an idling operation handle 40, which cannot rotate relative to the drive shaft 5, is interposed so as to be axially movable, and the idling operation handle 40 is urged toward the brake presser 8 side. Between the adjusting member 14 and the operation handle 40, when the operation handle 40 is in the non-idle operation, the relative rotation of the brake presser 8 with respect to the drive shaft 5 at a predetermined angle or more is restricted so that the rotation angle is within a predetermined angle. Rotation restricting means for allowing the brake presser 8 to advance and retract with respect to the brake receiver 7 by relative rotation; and the operation handle 4.
At the time of free rotation operation of 0, the operation handle 40 is elastically brought into contact with the adjusting member 14 by urging the operation handle 40 toward the brake retainer 8 side to suppress the relative rotation of the brake retainer 8 with respect to the drive shaft 5. A hoisting and traction machine, which is provided with an idling holding means for holding the idling state of the load sheave 3.
遊転保持面２２に弾接して遊転保持する係合突起４４と
から成り、前記遊転保持面２２と係合突起４４との一方
を、調整部材１４と遊転操作ハンドル４０との対向面の
一方に、他方を前記調整部材１４と遊転操作ハンドル４
０との他方に設けている請求項１記載の捲上牽引機。2. The idling holding means comprises an idling holding surface 22 and an engaging protrusion 44 which elastically contacts the idling holding surface 22 to hold the idling holding surface 22, and the idling holding surface 22 and the engaging protrusion 44. On one side of the facing surfaces of the adjusting member 14 and the idling operation handle 40, and on the other side the adjusting member 14 and the idling operating handle 4
The hoisting and traction machine according to claim 1, wherein the hoisting and traction machine is provided on the other side of 0.
回転を規制する規制手段は、遊転保持手段の係合突起４
４が係合する第１規制面２１ａと第２規制面２１ｂとを
備え、遊転保持面２２は、前記第２規制面２１ｂに連続
して設けられていると共に、前記係合突起４４の第２規
制面２１ｂに対する対向面と前記第２規制面２１ｂとの
少なくとも一方に、遊転操作ハンドル４０の遊転操作方
向への回転時、前記係合突起４４を前記遊転保持面２２
に案内する傾斜状ガイド面４４ａを備えている請求項２
記載の捲上牽引機。3. The restricting means for restricting the relative rotation of the brake presser 8 with respect to the drive shaft 5 is the engaging projection 4 of the idle holding means.
4 is provided with a first regulation surface 21a and a second regulation surface 21b, and the idling holding surface 22 is provided continuously to the second regulation surface 21b and at the When the idling operation handle 40 is rotated in the idling operation direction, the engaging protrusion 44 is provided on at least one of the surface facing the second regulating surface 21b and the second regulating surface 21b.
3. An inclined guide surface 44a for guiding to the inner side is provided.
The hoisting and pulling machine described.
に、該駆動部材１０の駆動回転方向への回転時該駆動部
材１０をブレーキ押え８に対しフリー回転可能とし、非
駆動回転方向への回転時、前記駆動部材１０をブレーキ
押え８と一体回転可能とする一方向回転機構を設けると
共に、該一方向回転機構は、前記ブレーキ押え８と駆動
部材１０との対向面の一方に進退可能に保持する係合体
８６と、前記駆動部材１０の非駆動回転方向への回転
時、前記係合体８６が係合する係合溝１９とから成り、
この係合溝１９が複数設けられている請求項１記載の捲
上牽引機。4. The drive member 10 is freely rotatable with respect to the brake presser 8 during rotation of the drive member 10 in the drive rotation direction between the brake presser 8 and the drive member 10, and the drive member 10 is free to rotate in the non-drive rotation direction. At the time of rotation, a one-way rotation mechanism that allows the drive member 10 to rotate integrally with the brake presser 8 is provided. And an engaging groove 86 with which the engaging body 86 engages when the drive member 10 rotates in the non-drive rotation direction.
The hoisting traction machine according to claim 1, wherein a plurality of the engaging grooves 19 are provided.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4243809A JPH0777958B2 (en) | 1991-12-02 | 1992-09-11 | Hoisting machine |
| US07/945,403 US5351937A (en) | 1991-09-20 | 1992-09-16 | Hoist and traction machine with free rotation control |
| EP92308455A EP0533468B1 (en) | 1991-09-20 | 1992-09-17 | Hoist & traction machine |
| DE69207690T DE69207690T2 (en) | 1991-09-20 | 1992-09-17 | Hoist |
| CN 92110810 CN1026974C (en) | 1991-09-20 | 1992-09-19 | Hoist and traction machine |
| KR1019920017115A KR960002339B1 (en) | 1991-09-20 | 1992-09-19 | Hoist and traction machine |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31804091 | 1991-12-02 | ||
| JP3-318040 | 1991-12-02 | ||
| JP4243809A JPH0777958B2 (en) | 1991-12-02 | 1992-09-11 | Hoisting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05208798A true JPH05208798A (en) | 1993-08-20 |
| JPH0777958B2 JPH0777958B2 (en) | 1995-08-23 |
Family
ID=26536443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4243809A Expired - Fee Related JPH0777958B2 (en) | 1991-09-20 | 1992-09-11 | Hoisting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0777958B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100636560B1 (en) * | 1999-06-07 | 2006-10-19 | 바이탈 고교 가부시키가이샤 | chain hoist with overload preventive device |
| WO2013133035A1 (en) * | 2012-03-08 | 2013-09-12 | 株式会社キトー | Manually operated hoisting / towing device |
| WO2021251077A1 (en) * | 2020-06-09 | 2021-12-16 | 株式会社キトー | Rotation lock device, lever hoist, and hoisting machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0373796A (en) * | 1989-08-15 | 1991-03-28 | Kito Corp | Overload preventing free operation device of lever type small-sized hoisting and traction device |
| JPH03166197A (en) * | 1989-11-25 | 1991-07-18 | Baitaru Kogyo Kk | Lever type hoist |
-
1992
- 1992-09-11 JP JP4243809A patent/JPH0777958B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0373796A (en) * | 1989-08-15 | 1991-03-28 | Kito Corp | Overload preventing free operation device of lever type small-sized hoisting and traction device |
| JPH03166197A (en) * | 1989-11-25 | 1991-07-18 | Baitaru Kogyo Kk | Lever type hoist |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100636560B1 (en) * | 1999-06-07 | 2006-10-19 | 바이탈 고교 가부시키가이샤 | chain hoist with overload preventive device |
| WO2013133035A1 (en) * | 2012-03-08 | 2013-09-12 | 株式会社キトー | Manually operated hoisting / towing device |
| JP2013184790A (en) * | 2012-03-08 | 2013-09-19 | Kito Corp | Manually operated hoisting/towing device |
| CN104203797A (en) * | 2012-03-08 | 2014-12-10 | 株式会社开道 | Manually operated hoisting / towing device |
| EP2824060A4 (en) * | 2012-03-08 | 2015-09-16 | Kito Kk | Manually operated hoisting / towing device |
| CN104203797B (en) * | 2012-03-08 | 2017-03-15 | 株式会社开道 | Hand hoisting traction apparatuss |
| US9802798B2 (en) | 2012-03-08 | 2017-10-31 | Kito Corporation | Hand operated pulling and lifting hoist |
| WO2021251077A1 (en) * | 2020-06-09 | 2021-12-16 | 株式会社キトー | Rotation lock device, lever hoist, and hoisting machine |
| JPWO2021251077A1 (en) * | 2020-06-09 | 2021-12-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0777958B2 (en) | 1995-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4004780A (en) | Winch | |
| US5305989A (en) | Hoist and traction machine with free rotation control | |
| JP2597273B2 (en) | Idling control device in hoisting traction machine | |
| JPH0729754B2 (en) | Lever type hoisting machine | |
| US9802798B2 (en) | Hand operated pulling and lifting hoist | |
| JPH10220550A (en) | Drive unit | |
| JPH05208798A (en) | Hoist tow machine | |
| JP3065038B2 (en) | Chain block | |
| KR960002339B1 (en) | Hoist and traction machine | |
| JPH06271290A (en) | Idle rotation device for lever type traction and hoist machine | |
| JPH05213155A (en) | Belt retractor with tension releasing function | |
| WO2023286404A1 (en) | Rotation lock device and hoisting machine | |
| JPH05213586A (en) | Idling control device in hoisting traction machine | |
| WO2021251077A1 (en) | Rotation lock device, lever hoist, and hoisting machine | |
| JP2610221B2 (en) | Lever type hoisting traction machine | |
| JP4573600B2 (en) | Overload prevention device for hoisting machine | |
| JP2024011499A (en) | lever hoist | |
| JPH05132293A (en) | Small-sized traction and hoisting machine | |
| JP2001233177A (en) | Seat belt winding device | |
| JPH0736951Y2 (en) | Lever type hoisting and pulling device | |
| JPH07165393A (en) | Idling control device for hoisting traction device | |
| JPH0460915B2 (en) | ||
| JP2002193591A (en) | Lever type hoist | |
| JPH0674115B2 (en) | Idling device for tow hoist | |
| JPH05105400A (en) | Small-sized hauling hoist |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070823 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080823 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080823 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090823 Year of fee payment: 14 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100823 Year of fee payment: 15 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100823 Year of fee payment: 15 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110823 Year of fee payment: 16 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120823 Year of fee payment: 17 |
|
| LAPS | Cancellation because of no payment of annual fees |