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 |
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