JP2610221B2 - Lever type hoisting traction machine - Google Patents

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明はレバー式巻上牽引機、詳
しくは、ロードシーブと、従動部材をもち前記ロードシ
ーブを駆動する駆動軸と、該駆動軸に螺着する駆動部材
と、この駆動部材と前記従動部材との間に設けるメカニ
カルブレーキと、前記駆動部材を正逆方向に駆動する操
作レバーとを備えたレバー式巻上牽引機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lever type hoisting and pulling machine, and more particularly, to a drive shaft having a load sheave, a driven member for driving the load sheave, and a driving member screwed to the drive shaft. The present invention relates to a lever-type hoisting and pulling machine including a mechanical brake provided between a driving member and the driven member, and an operation lever for driving the driving member in forward and reverse directions.

【０００２】[0002]

【従来の技術】従来、この種巻上牽引機として、ロード
シーブをフリー回転可能とし、該ロードシーブに掛回さ
れたロードチエンを引出したり引戻したりして長さ調整
可能とする遊転制御機構を備えたものは種々提供されて
いるが、本願出願人は、斯かる遊転制御機構を備えた巻
上牽引機として、先に次のようなものを提案した（特願
平３−２４１３７２号）。その主旨は、駆動軸の軸端部
にストッパを設けて、このストッパと操作レバーに連動
する駆動軸に螺着された駆動部材との間に操作ハンドル
を、前記駆動部材に近接してロードシーブの定常運転を
行う第１位置と、同駆動部材から離反してロードシーブ
の遊転制御を行う第２位置とにわたり軸方向移動可能
で、かつ、前記駆動軸に対し相対回転不能に介装させる
と共に、前記操作ハンドルとストッパとの間に、前記操
作ハンドルを駆動部材の方向に付勢する弾性押圧部材を
介装させたものである。2. Description of the Related Art Conventionally, as this type of hoisting and pulling machine, a free-running control mechanism that allows a load sheave to freely rotate and allows a length to be adjusted by pulling or pulling back a load chain wound around the load sheave. Although various types are provided with the above, the present applicant has previously proposed the following as a hoisting and traction machine having such a free-running control mechanism (Japanese Patent Application No. 3-241372). ). The main point is that a stopper is provided at the shaft end of the drive shaft, and an operation handle is provided between the stopper and a drive member screwed to the drive shaft interlocking with the operation lever, and a load sheave is provided close to the drive member. And a second position for performing idle rotation control of the load sheave away from the driving member and interposed so as to be non-rotatable with respect to the drive shaft. In addition, an elastic pressing member for urging the operation handle in the direction of the driving member is interposed between the operation handle and the stopper.

【０００３】そして、前記ロードシーブの遊転制御時、
つまり、該ロードシーブをフリー回転可能として、前記
ロードチェンを引出したり引戻したりして長さ調整を行
うときには、作業者が前記操作ハンドルを第１位置から
第２位置側へと引出し、前記駆動部材の回転を阻止した
状態で、前記操作ハンドルを回転させることにより前記
駆動軸を回転させ、この回転で駆動軸に螺着する駆動部
材をメカニカルブレーキに対し螺退させ、この螺退でメ
カニカルブレーキを非作動位置に保持することにより、
前記ロードシーブの遊転制御を可能とし、かつ、この状
態で前記操作ハンドルを駆動部材に前記弾性押圧部材の
押圧力で弾接させることにより、前述した遊転制御状態
を保持できるようにしている。一方、前記ロードシーブ
の定常運転を行う場合で荷揚げ作業時には、前記操作ハ
ンドルを第２位置から第１位置側に移動させて、前記操
作レバーで前記駆動部材を正転方向に回転させることに
より、この駆動部材を駆動軸に沿ってメカニカルブレー
キ側に螺進させ、この螺進で前記メカニカルブレーキを
作動させて、前記操作レバーの操作力を前記ロードシー
ブに伝え、該ロードシーブに掛回したロードチェンを介
して荷揚げ作業が行われる。また、定常運転時で荷下し
作業を行う場合には、前記操作レバーで駆動部材を逆転
方向に回転させることにより、この駆動部材を前記駆動
軸に沿ってメカニカルブレーキに対し螺退させ、この螺
退により前記メカニカルブレーキの制動を中止させ、荷
物の負荷で前記ロードシーブ及び駆動軸を前記駆動部材
がメカニカルブレーキを作動させるまでの範囲で逆転さ
せ、斯かる操作を繰り返すことにより荷下し作業が行わ
れるのである。At the time of the idle rotation control of the load sheave,
That is, when the load sheave is freely rotatable and the load chain is pulled out or pulled back to adjust the length, an operator pulls out the operation handle from the first position to the second position, and the driving member In a state where the rotation of the drive shaft is blocked, the drive shaft is rotated by rotating the operation handle, and the rotation causes the drive member screwed to the drive shaft to retreat with respect to the mechanical brake. By holding in the inactive position,
To allow the free rotation control of the load sheave, and by elastic contact with the pressing force of the elastic pressing member the operating handle to the drive member in this state, so as to cut with holding the free rotation control state described above I have. On the other hand, at the time of unloading work in the case of performing the steady operation of the load sheave, by moving the operation handle from the second position to the first position side and rotating the drive member in the normal rotation direction by the operation lever, The drive member is screwed to the mechanical brake side along the drive shaft, and the screw is operated to operate the mechanical brake, thereby transmitting the operation force of the operation lever to the load sheave, and the load applied to the load sheave. Unloading work is performed via the chain. Further, when performing the unloading work during the steady operation, the driving member is rotated in the reverse direction by the operation lever, whereby the driving member is screwed away from the mechanical brake along the driving shaft. The braking of the mechanical brake is stopped by retraction, the load sheave and the drive shaft are reversed by the load of the load within a range until the drive member activates the mechanical brake, and the unloading operation is performed by repeating such an operation. Is performed.

【０００４】[0004]

【発明が解決しようとする課題】所が、以上の巻上牽引
機では、前記ロードシーブの遊転制御時に、前記操作ハ
ンドルを前記第１位置から第２位置へと引出し、この第
２位置において前記操作ハンドルを前記弾性押圧部材の
付勢力で駆動部材に弾接させ、該駆動部材の駆動軸に対
する相対回転を抑制して前述した遊転制御状態を保持す
るようにしているため、この遊転制御により前記ロード
チエンの引出し又は引戻しを行う場合、該ロードチエン
に作用させる引張り力の入力範囲を拡大できて、熟練を
要することなく遊転操作を簡単に行える反面、次のよう
な問題が発生したのである。即ち、前記操作ハンドル
は、定常運転が行われる第１位置と遊転制御が行われる
第２位置との範囲で軸方向移動されるのであるが、この
第２位置への移動は、前記駆動部材による前記メカニカ
ルブレーキに対する押圧力を解除して、該メカニカルブ
レーキを非作動位置に保持可能な小さな範囲で行われる
ことから、前記操作ハンドルが第１及び第２位置の何れ
に位置されているかを外部から容易には判断することが
できず、このため、ややもすると作業者が誤って、前記
操作ハンドルを定常運転が行われる第１位置に位置させ
たままで遊転操作を行ったり、また、遊転制御が行われ
る第２位置に保持させたままで前記ロードチエンの巻上
げや巻戻しを行ったりして混乱を招くなどの不都合が生
じたのである。However, in the hoisting and traction machine described above, the operation handle is pulled out from the first position to the second position during the idle rotation control of the load sheave. The operation handle is elastically contacted with the drive member by the biasing force of the elastic pressing member, and the relative rotation of the drive member with respect to the drive shaft is suppressed to maintain the idle control state described above. When pulling out or pulling back the load chain by control, the input range of the pulling force acting on the load chain can be expanded and the idle operation can be easily performed without skill, but the following problems occur. It was done. That is, the operating handle is axially moved in a range between a first position where steady operation is performed and a second position where idle control is performed. The movement to the second position is performed by the driving member. Is released in a small range where the mechanical brake can be held at the non-operating position by releasing the pressing force on the mechanical brake, so that whether the operating handle is located at the first position or the second position is determined by the external device. Therefore, it is difficult for the operator to perform the idle operation while keeping the operation handle in the first position where the steady operation is performed. This causes inconvenience, such as causing the load chain to wind up or rewind while being held at the second position where the roll control is performed, thereby causing confusion.

【０００５】本発明の目的は、操作ハンドルを引出すだ
けの簡単な操作で遊転制御が行えて操作性をより簡便に
でき、しかも、前記操作ハンドルが定常運転が行われる
第１位置又は遊転制御が行われる第２位置の何れに位置
されているかを外部から容易に判断することができて、
作業者の誤操作をなくすことができるレバー式巻上牽引
機を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to perform idle rotation control with a simple operation of pulling out an operation handle, thereby making it easier to operate, and at the first position or idle rotation where the operation handle is operated in a steady state. It can be easily determined from the outside which of the second positions where the control is performed,
An object of the present invention is to provide a lever-type hoisting and traction machine that can eliminate operator's erroneous operation.

【０００６】[0006]

【課題を解決するための手段】以上の目的を達成するた
めに、本発明は、ロードシーブ３と、従動部材７をもち
前記ロードシーブ３を駆動する駆動軸５と、この駆動軸
５に螺着する駆動部材８と、この駆動部材８と前記従動
部材７との間に設けるメカニカルブレーキ１３と、前記
駆動部材８を正逆方向に駆動する操作レバー１６とを備
えたレバー式巻上牽引機において、前記駆動部材８は遊
転制御面３５を備え、前記駆動軸５の軸端部には、前記
駆動部材８と近接する第１位置と離反する第２位置とに
わたり軸方向移動のみ可能で、第２位置への操作時前記
遊転制御面３５に係合して、前記駆動部材８を前記メカ
ニカルブレーキ１３の非作動位置に保持する操作ハンド
ル１８を備えると共に、前記操作レバー１６のボス部１
６ａに、前記操作ハンドル１８に向かって突出する突出
筒１６ｂを設け、前記操作ハンドル１８に前記突出筒１
６ｂを覆う筒状覆い部１８ａを設けて、前記突出筒１６
ｂに前記操作ハンドル１８の第２位置への操作時前記覆
い部１８ａの移動で表出する遊転表示部３７を設けたの
である。In order to achieve the above object, the present invention provides a load sheave 3, a drive shaft 5 having a driven member 7 for driving the load sheave 3, and a screw connected to the drive shaft 5. A lever-type hoisting and traction machine including a driving member 8 to be mounted, a mechanical brake 13 provided between the driving member 8 and the driven member 7, and an operation lever 16 for driving the driving member 8 in the forward and reverse directions. In the above, the driving member 8 is provided with an idle rotation control surface 35, and the shaft end of the driving shaft 5 can only move in the axial direction over a first position close to the driving member 8 and a second position away from the driving member 8. An operating handle 18 which engages with the idle rotation control surface 35 when operating to the second position to hold the driving member 8 at a position where the mechanical brake 13 is not operated, and a boss portion of the operating lever 16. 1
6a, a protruding cylinder 16b protruding toward the operation handle 18 is provided.
6b is provided to cover the projecting cylinder 16a.
b is provided with an idle display portion 37 that appears when the cover 18a moves when the operation handle 18 is operated to the second position.

【０００７】[0007]

【作用】以上の構成によれば、前記ロードシーブ３の定
常運転を行う場合には、前記操作ハンドル１８を前記駆
動部材８に対し近接する第１位置に移動させた状態で、
前記操作レバー１６を正逆方向に回転操作することによ
り、前記ロードシーブ３が正逆方向に回転されて、この
ロードシーブ３に掛回されたロードチエンにより荷揚げ
及び荷下し作業が行われ、また、前記操作ハンドル１８
を前記駆動部材８から離反する第２位置側に移動させ、
この駆動部材８の遊転制御面３５に前記操作ハンドル１
８を係合させて前記メカニカルブレーキ１３を非作動位
置に保持することにより、前記ロードシーブ３がフリー
回転可能な遊転状態に保持されるのであり、従って、斯
かる遊転状態に保持することによって、前記ロードチエ
ンの引張り力の入力範囲を拡げられ、熟練を要すること
なく、該ロードチエンを迅速に引出したり引戻したりし
て、その長さ調整を行うことができるのである。そし
て、以上のように、前記操作ハンドル１８を第２位置に
移動させて遊転制御を行うときには、この操作ハンドル
１８の移動操作により該ハンドル１８に設けた筒状覆い
部１８ａが追従移動され、これに伴い前記操作レバー１
３の突出筒１６ｂに設けた遊転表示部３７が外部表出さ
れ、従って、前記操作ハンドル１８が第２位置側に位置
されていて前記ロードシーブ３が遊転制御状態にあるこ
とを外部から容易に判断することができ、また、前記遊
転表示部３７が前記ハンドル１８の筒状覆い部１８ａで
覆われていて外部から見えないときには、前記操作ハン
ドル１８が第１位置側にあって前記ロードシーブ３が定
常運転状態にあることを容易に判断できるのであり、こ
のため、作業者の誤操作をなくすことができるのであ
る。According to the above arrangement, when the load sheave 3 is operated in a steady state, the operation handle 18 is moved to the first position close to the drive member 8 in a state where the operation handle 18 is moved to the first position.
By rotating the operation lever 16 in the forward and reverse directions, the load sheave 3 is rotated in the forward and reverse directions, and the unloading and unloading operations are performed by the load chain wrapped around the load sheave 3, The operation handle 18
To the second position side away from the driving member 8,
The operation handle 1 is provided on the idle rotation control surface 35 of the drive member 8.
By holding the mechanical brake 13 in the non-operating position by engaging the engaging gear 8, the load sheave 3 is held in a free rotation state in which the load sheave 3 is freely rotatable. Thereby, the input range of the pulling force of the load chain can be expanded, and the length can be adjusted by quickly pulling out or pulling back the load chain without skill. As described above, when the idle rotation control is performed by moving the operation handle 18 to the second position, the moving operation of the operation handle 18 causes the tubular covering portion 18a provided on the handle 18 to follow, and Accordingly, the operation lever 1
3, the idle display portion 37 provided on the protruding cylinder 16b is externally exposed. Therefore, it is determined from the outside that the operation handle 18 is located at the second position and the load sheave 3 is in the idle control state. When the idling display portion 37 is covered with the tubular covering portion 18a of the handle 18 and cannot be seen from the outside, the operation handle 18 is located at the first position side and the It is possible to easily determine that the load sheave 3 is in the steady operation state, and thus it is possible to eliminate erroneous operation by the operator.

【０００８】[0008]

【実施例】図１に示したレバー式巻上牽引機は、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をもった筒軸４を回転自由に支持
して、該筒軸４内に、後記する操作レバー側から回転動
力が伝達される駆動軸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２から突出される外側
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を介装させて、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 A lever-type hoisting and traction machine shown in FIG. 1 includes first and second side plates 1 and 2 which are arranged opposite to each other at a predetermined interval.
In the meantime, a cylindrical shaft 4 having a load sheave 3 is rotatably supported, and a drive shaft 5 to which rotational power is transmitted from an operation lever side, which will be described later, is rotatably supported within the cylindrical shaft 4. A reduction gear mechanism 6 composed of a plurality of reduction gears is interposed between an outer end of the drive shaft 5 protruding from the second side plate 2 and the load sheave 3, and the reduction gear mechanism 6
Thus, the rotational power of the drive shaft 5 is transmitted to the load sheave 3 at a reduced speed.

【０００９】また、前記第１側板１から突出される前記
駆動軸５の外部側にはフランジをもったハブから成る従
動部材７を螺着し、該従動部材７の外方側で前記駆動軸
５上に、外周に歯部８ａをもつ駆動部材８を螺着すると
共に、この駆動部材８と前記従動部材７との間に、一対
の制動板９，１０と制動用爪車１１とをそれぞれ介装さ
せ、かつ、前記第１側板１に、前記制動用爪車１１と噛
合する制動用爪１２を設けて、これら制動用爪車１１及
び各制動板９，１０からメカニカルブレーキ１３を構成
している。A driven member 7 composed of a hub having a flange is screwed to the outside of the drive shaft 5 protruding from the first side plate 1, and the drive shaft is mounted on the outside of the driven member 7. A driving member 8 having a tooth portion 8a on its outer periphery is screwed on the upper surface 5, and a pair of brake plates 9, 10 and a braking ratchet 11 are provided between the driving member 8 and the driven member 7, respectively. A braking pawl 12 is provided on the first side plate 1 to be engaged with the braking pawl 11, and a mechanical brake 13 is constituted by the braking pawl 11 and the brake plates 9 and 10. ing.

【００１０】更に、前記メカニカルブレーキ１３の外周
部を被覆するブレーキカバー１３ａの外側部で前記駆動
部材８の径方向外方側には、該駆動部材８の外周部に設
けた前記歯部８ａに噛合可能な送り側爪及び戻し側爪を
備えた送り爪片１４をもち、該送り爪片１４の送り側爪
及び戻し側爪を前記歯部８ａに選択的に係脱操作する操
作部１５を備えた操作レバー１６を設けている。Further, on the outer side of the brake cover 13a covering the outer peripheral portion of the mechanical brake 13 and on the radially outer side of the drive member 8, the tooth portion 8a provided on the outer peripheral portion of the drive member 8 is provided. An operation unit 15 having a feed claw piece 14 having a feed claw and a return claw that can be engaged with each other, and selectively operating the feed claw and the return claw of the feed claw piece 14 to the tooth portion 8a. An operation lever 16 is provided.

【００１１】しかして、以上のように構成したレバー式
巻上牽引機において、前記駆動軸５の軸端部にストッパ
ー１７を設けて、このストッパー１７と前記駆動部材８
との間に、前記駆動軸５に対し相対回転不能とした操作
ハンドル１８を、前記駆動部材８に近接してロードシー
ブ３の定常運転を行う第１位置と、駆動部材８から離反
してロードシーブ３の遊転制御を行う第２位置とにわた
って軸方向移動可能に介装すると共に、前記駆動部材８
には遊転制御面３５を設けて、前記操作ハンドル１８の
第２位置への操作時、該ハンドル１８を前記遊転制御面
３５に係合させることにより、前記駆動部材８を前記メ
カニカルブレーキ１３から離反させて、該メカニカルブ
レーキ１３を非作動位置に保持するようになす一方、前
記操作レバー１３のボス部１６ａに、前記操作ハンドル
１８に向かって突出する突出筒１６ｂを設け、また、前
記操作ハンドル１８には前記突出筒１６ｂを覆う筒状覆
い部１８ａを設けて、前記突出筒１６ｂに前記操作ハン
ドル１８の第２位置への操作時に前記覆い部１８ａの移
動で表出する遊転表示部３７を設けたのである。In the lever-type hoisting and pulling machine constructed as described above, the stopper 17 is provided at the shaft end of the drive shaft 5, and the stopper 17 and the drive member 8 are provided.
Between the first position where the operation handle 18 which cannot be rotated relative to the drive shaft 5 is brought into close proximity to the drive member 8 and the load sheave 3 is operated in a steady state. The drive member 8 is interposed so as to be movable in the axial direction over a second position for controlling the idle rotation of the sheave 3.
Is provided with an idle rotation control surface 35, and when the operation handle 18 is operated to the second position, the handle 18 is engaged with the idle rotation control surface 35, so that the drive member 8 , The mechanical brake 13 is held at a non-operating position, and a boss 16a of the operating lever 13 is provided with a projecting cylinder 16b projecting toward the operating handle 18; The handle 18 is provided with a cylindrical cover portion 18a for covering the protruding tube 16b, and when the operation handle 18 is operated to the second position on the protruding tube 16b, an idle display portion that is exposed by movement of the cover portion 18a. 37 are provided.

【００１２】更に詳記すると、前記操作ハンドル１８と
ストッパー１７との間には、前記ハンドル１８を駆動部
材８の方向に付勢し、かつ、一対のばね足１９ａ，１９
ｂをもち、一方のばね足１９ａを前記ストッパー１７に
係止し、他方のばね足１９ｂを駆動部材８に係止して、
この駆動部材８をブレ−キ弛緩方向に付勢する主として
コイルばねから成る遊転用ばね１９を設けると共に、前
記ハンドル１８と駆動部材８との間には、該駆動部材８
の駆動軸５に対する相対回転範囲を規制し、前記ハンド
ル１８の駆動部材８に対する離反方向への移動つまり前
記第２位置への移動で規制解除可能とした規制手段を設
けるのである。More specifically, between the operating handle 18 and the stopper 17, the handle 18 is urged in the direction of the driving member 8, and a pair of spring feet 19a, 19
b, one spring foot 19a is locked to the stopper 17 and the other spring foot 19b is locked to the drive member 8,
An idle spring 19 mainly composed of a coil spring for urging the driving member 8 in the brake relaxation direction is provided, and the driving member 8 is provided between the handle 18 and the driving member 8.
A regulating means is provided which regulates the relative rotation range of the handle 18 with respect to the drive shaft 5 and which can release the regulation by the movement of the handle 18 in the direction away from the drive member 8, ie, the movement to the second position.

【００１３】即ち、図１に示した実施例では、前記駆動
軸５に第１及び第２ねじ部２０，２１とセレーション部
２３とを設け、第１ねじ部２０に前記従動部材７を、ま
た、第２ねじ部２１に前記駆動部材８を螺着して、前記
従動部材７と前記駆動部材８との間にはコイルスプリン
グ２４を介装して該コイルスプリング２４により前記駆
動軸５に対する前記従動部材７の軸方向移動を拘束する
と共に、前記駆動部材８を、該駆動部材８の前記駆動軸
５に対する正転により図１左方向へ螺進するようにして
おり、また、前記駆動部材８の外方側における前記セレ
ーション部２３に１対のスリーブ２５、２６を嵌合する
と共に、第１スリーブ２５に鍔２５ａを設け、第２スリ
ーブ２６の外方側における前記セレーション部２３の端
部に前記ストッパー１７をセレーション結合により取付
け、ナット２７の締め付けにより該ストッパー１７を前
記各スリーブ２５、２６を介して前記駆動軸５に固定し
ている。That is, in the embodiment shown in FIG. 1, the drive shaft 5 is provided with first and second screw portions 20, 21 and a serration portion 23, the first screw portion 20 is provided with the driven member 7, and The driving member 8 is screwed to the second screw portion 21, and a coil spring 24 is interposed between the driven member 7 and the driving member 8. The drive member 8 is screwed leftward in FIG. 1 by forward rotation of the drive member 8 with respect to the drive shaft 5 while restraining the driven member 7 from moving in the axial direction. A pair of sleeves 25 and 26 are fitted to the serration portion 23 on the outer side of the first sleeve 25, and a flange 25a is provided on the first sleeve 25, and the end of the serration portion 23 on the outer side of the second sleeve 26 The stopper Mounting 17 by serration coupling, it is fixed to the drive shaft 5 to the stopper 17 through the respective sleeves 25 and 26 by tightening the nut 27.

【００１４】また、前記第２スリーブ２６に前記操作ハ
ンドル１８のボス部２８に設けた嵌合孔２８ａを嵌合し
て、前記操作ハンドル１８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１
７と駆動部材８との間に介装すると共に、図２に示した
ように、前記操作ハンドル１８の内周面には凸条２９を
設ける一方、前記ストッパー１７の外周部には、図３に
示したように、前記凸条２９が係合する係合凹溝３０を
設けて、前記操作ハンドル１８の凸条２９を、前記スト
ッパー１７の係合凹溝３０に係合させ、この係合により
前記操作ハンドル１８を前記駆動軸５に対し相対回転不
能にするのである。A fitting hole 28a provided in the boss 28 of the operation handle 18 is fitted into the second sleeve 26, so that the operation handle 18 can be moved in the axial direction of the drive shaft 5, and Stopper 1 in a rotatable state
2 and a ridge 29 is provided on the inner peripheral surface of the operation handle 18 as shown in FIG. As shown in FIG. 7, an engaging groove 30 with which the ridge 29 is engaged is provided, and the ridge 29 of the operation handle 18 is engaged with the engaging groove 30 of the stopper 17. Accordingly, the operation handle 18 cannot be rotated relative to the drive shaft 5.

【００１５】また、前記遊転用ばね１９は、前記操作ハ
ンドル１８のボス部２８の外側面と前記ストッパー１７
の前記ボス２８に対向する内側面との間に介入させると
共に、前記ストッパー１７と駆動部材８とには、図３及
び図６に示したように、前記ばね１９のばね足１９ａ，
１９ｂを係止する係止孔４１，４２を設け、また、前記
操作ハンドル１８には前記駆動部材８の係止孔４２に係
止する前記ばね足１９ｂの途中を貫通させるための円弧
状の長孔４３を設け、この長孔４３を介して前記ばね足
１９ｂを前記駆動部材８の係止孔４２に係止している。The idle spring 19 is provided between the outer surface of the boss 28 of the operating handle 18 and the stopper 17.
3 and 6, the stopper 17 and the driving member 8 have spring legs 19a and 19a of the spring 19, as shown in FIGS.
Lock holes 41 and 42 for locking the lock lever 19b are provided, and the operating handle 18 has an arc-shaped length for penetrating the spring foot 19b which locks to the lock hole 42 of the driving member 8. A hole 43 is provided, and the spring foot 19b is locked in the locking hole 42 of the driving member 8 via the long hole 43.

【００１６】そして、前記ばね１９の各ばね足１９ａ，
１９ｂを係止孔４１，４２に係止して前記ばね１９と前
記ストッパー１７と操作ハンドル１８との間にセットす
るとき、前記駆動軸５のセレーション部２３に組込む前
記ストッパー１７を、該ストッパー１７の係止孔４１に
係止するばね足１９ａが前記駆動部材８の係止孔４２に
係止するばね足１９ｂに対し周方向に変位し、前記駆動
部材８をブレ−キ弛緩方向即ち、図４の点線矢印方向
に、前記ばね１９のばね反力が作用するように捩じって
前記セレーション部２３に結合するのであって、斯くす
ることにより前記駆動部材８は、前記ばね１９によりブ
レ−キ弛緩方向に付勢されることになり、後記する遊転
操作時、メカニカルブレ−キ１３を弛緩させ得るのであ
る。また、前記ストッパー１７と操作ハンドル１８との
間に介入する前記ばね１９のコイル部は、前記ストッパ
ー１７のナット２７による駆動軸５への固定時、前記ス
トッパー１７の内側と、前記操作ハンドル１８のボス部
２８の外側面とに接触するのであって、この接触で前記
コイル部が軸方向に撓み、前記操作ハンドル１８は前記
第１スリーブ２５の鍔２５ａに押圧されるように、つま
り、前記ストッパー１７から離反させる方向、即ち、前
記駆動部材８側に付勢されるのである。Then, each spring foot 19a,
When the spring 19, the stopper 17 and the operation handle 18 are set between the spring 19, the stopper 17 and the operating handle 18, the stopper 17 incorporated in the serration portion 23 of the drive shaft 5 is fixed to the stopper 17 The spring foot 19a locked in the locking hole 41 is displaced in the circumferential direction with respect to the spring foot 19b locked in the locking hole 42 of the drive member 8, and the drive member 8 is moved in the brake relaxing direction, In the direction indicated by the dotted line 4, the spring 19 is coupled to the serration portion 23 by being twisted so that the spring reaction force acts thereon, whereby the driving member 8 is braked by the spring 19. As a result, the mechanical brake 13 can be relaxed at the time of idle rotation, which will be described later. When the stopper 17 is fixed to the drive shaft 5 by the nut 27, the coil portion of the spring 19 interposed between the stopper 17 and the operation handle 18 is provided between the inside of the stopper 17 and the operation handle 18. The coil portion is bent in the axial direction by this contact, and the operating handle 18 is pressed by the flange 25a of the first sleeve 25, that is, the stopper is in contact with the outer surface of the boss portion 28. 17 is urged toward the driving member 8 side.

【００１７】尚、前記ストッパー１７に設ける前記係止
孔４１は、図３に示したように、前記ストッパー１７の
周方向に沿って複数個設け、これら係止孔４１の一つを
選択して前記ばね１９のばね足１９ａを係止するのであ
って、この係止孔４１の選択により前記ばね１９の捩り
ばね反力を調整できるようになっている。As shown in FIG. 3, a plurality of the locking holes 41 provided in the stopper 17 are provided along the circumferential direction of the stopper 17, and one of the locking holes 41 is selected. The spring foot 19a of the spring 19 is locked, and the torsion spring reaction force of the spring 19 can be adjusted by selecting the locking hole 41.

【００１８】更に、前記操作ハンドル１８のボス部２８
の背面側における半径方向端部には、前記駆動部材８側
へ突出する係合突起３１を図４に仮想線で示したように
対称状に二つ設けると共に、前記駆動部材８における前
記操作ハンドル１８のボス部２８に対向する側には、図
１及び図４に示したように１対の突出部３２を対称状に
設けて、これら突出部３２に、前記駆動部材８が駆動軸
５に対して相対回転するとき、前記係合突起３１が係合
して該駆動部材８の駆動軸５に対する相対回転範囲を規
制し前記規制手段を構成する第１及び第２規制面３３，
３４を設けると共に、この第２規制面３４と連続し、前
記操作ハンドル１８を前記駆動部材８に対し離反する第
２位置へ移動させて、前記駆動部材８を前記ばね１９の
捩り方向の付勢力で駆動軸５に対して相対回転すると
き、前記ばね１９の軸方向の付勢力で前記係合突起３１
の突出先端面を接触させ、前記メカニカルブレーキ１３
を非作動位置に保持する前記遊転制御面３５を設けるの
であり、また、前記突出部３２には、前記遊転制御面３
５から立ち上がり、前記係合突起３１の先端面が前記遊
転制御面３５に接触した状態で前記駆動部材８が駆動軸
５に対して相対回転するとき、前記係合突起３１の回転
方向前方側と係合する第３規制面３６を設けるのであ
る。Further, the boss 28 of the operating handle 18
At the radial end portion on the back side of the drive member 8, two engagement protrusions 31 protruding toward the drive member 8 are provided symmetrically as shown by phantom lines in FIG. A pair of protrusions 32 is provided symmetrically on the side of the boss 18 facing the boss 28 as shown in FIGS. 1 and 4, and the drive member 8 is connected to the drive shaft 5 by these protrusions 32. The first and second regulating surfaces 33, which constitute the regulating means by regulating the relative rotation range of the drive member 8 with respect to the drive shaft 5 by engaging the engagement projections 31 when the relative rotation is made,
34, the operating handle 18 is moved to a second position separated from the driving member 8 to be continuous with the second regulating surface 34, and the driving member 8 is biased by the spring 19 in the torsional direction. When the relative rotation with respect to the drive shaft 5 is performed, the engagement projection 31 is pressed by the axial urging force of the spring 19.
Contact the protruding tip surface of the mechanical brake 13
The idle control surface 35 for holding the idle control surface 35 in the non-operation position is provided.
5, when the driving member 8 is relatively rotated with respect to the drive shaft 5 in a state in which the tip end surface of the engagement protrusion 31 is in contact with the idle rotation control surface 35, the rotation projection front side of the engagement protrusion 31 That is, the third regulating surface 36 is provided which engages with.

【００１９】そして、前記操作レバー１６のボス部１６
ａに設ける前記突出筒１６ｂを、前記遊転制御面３５が
形成される突出部３２と前記操作ハンドル１８から突出
される各係合突起３１との外周囲を覆うように、該ハン
ドル１８側に向かって一体状に突出形成し、斯かる突出
筒１６ｂの外周面に、遊転制御状態を表示する文字や記
号などを直接印刷したり又は同文字などが印刷されたシ
ール材を貼着するなどして前記遊転表示部３７を形成す
るのであり、一方、前記ハンドル１８に設ける前記筒状
覆い部１８ａは、前記突出筒１６ｂの外周囲に位置さ
れ、該突出筒１６ｂとオーバーラップするように、前記
ハンドル１８の外周部位に前記操作レバー１６側に向け
て一体状に突出形成するのであって、前記ハンドル１８
を第２位置側に移動させて遊転制御を行うとき、このハ
ンドル１８の移動操作に伴う前記覆い部１８ａの追従移
動により、前記突出筒１６ｂに設けた遊転表示部３７を
外部に表出させ、この外部表出により前記操作ハンドル
１８が第２位置側に位置されていて前記ロードシーブ３
が遊転制御状態にあることを外部から判断可能となすの
である。The boss 16 of the operating lever 16
The projecting cylinder 16b provided on the handle 18 is disposed on the handle 18 side so as to cover the outer periphery of the projecting portion 32 on which the idle rotation control surface 35 is formed and the engaging projections 31 projected from the operation handle 18. For example, characters or symbols indicating the idle rotation control state are directly printed on the outer peripheral surface of the protruding cylinder 16b, or a sealing material on which the characters are printed is attached. Thus, the idle display portion 37 is formed. On the other hand, the tubular covering portion 18a provided on the handle 18 is located around the outer periphery of the projecting tube 16b and overlaps with the projecting tube 16b. The handle 18 is integrally formed on the outer peripheral portion of the handle 18 toward the operation lever 16.
When the idle rotation control is performed by moving the handle 18 to the second position side, the idle display portion 37 provided on the protruding cylinder 16b is exposed to the outside by the follow-up movement of the cover portion 18a accompanying the moving operation of the handle 18. The operation handle 18 is positioned at the second position side by the external expression, and the load sheave 3
Can be judged from the outside that the vehicle is in the idle control state.

【００２０】尚、図１において４４は、前記送り爪片１
４の送り側爪が駆動部材８の歯部８ａに係合する送り位
置（正転駆動位置）と、戻し側爪が前記歯部８ａに係合
する戻し位置（逆転駆動位置）及び前記送り側爪と戻し
側爪との何れもが前記歯部８ａに係合しない中立位置と
の３位置に保持する爪保持機構で、押体４５とばね４６
とにより構成している。In FIG. 1, reference numeral 44 denotes the feed claw 1
4 is a feed position (forward drive position) at which the feed-side pawl engages the tooth portion 8a of the drive member 8, a return position (reverse drive position) at which the return-side pawl is engaged with the tooth portion 8a, and the feed side. A claw holding mechanism for holding the claw and the return claw at three positions, that is, a neutral position where neither the claw nor the return claw is engaged with the tooth portion 8a.
It consists of:

【００２１】また、以上の構成では、前記駆動軸５上に
第１及び第２ねじ部２０、２１を設けて、前記従動部材
７と駆動部材８とを螺着したが、これは駆動軸の加工性
や強度の面を考慮したものであって、前記第１ねじ部２
０はセレーションでもよい。また、前記第１ねじ部２０
を設けて前記従動部材７を螺着する場合、前記コイルス
プリング２４により前記従動部材７の螺進を拘束するよ
うにしたが、前記第２ねじ部２１にＥリングを設けて、
該Ｅリングと前記従動部材７との間に前記コイルスプリ
ング２４を設けてもよい。また、前記第１ねじ部２０の
ねじ溝に米国ナイロック社製の大きな弾性反発力をも
ち、摩擦接合力をもったナイロン樹脂をコーティングし
て、前記従動部材７の螺進をその戻り止め効果で拘束し
てもよい。更に、前記従動部材７をねじ止めやコッター
ピンの打ち込みにより前記駆動軸５に固定してもよいの
であって、前記スプリング２４は必要なものでない。In the above configuration, the first and second screw portions 20 and 21 are provided on the drive shaft 5, and the driven member 7 and the drive member 8 are screwed. In consideration of workability and strength, the first screw portion 2
0 may be serration. Also, the first screw portion 20
In the case where the driven member 7 is screwed in with the provided, the screw spring 24 restrains the driven member 7 from being screwed, but an E-ring is provided in the second screw portion 21,
The coil spring 24 may be provided between the E-ring and the driven member 7. Further, the thread groove of the first threaded portion 20 is coated with nylon resin having a large elastic repulsion force and a frictional joining force manufactured by Nylok Co., USA, so that the driven member 7 can be screwed forward by its detent effect. You may be restrained. Further, the driven member 7 may be fixed to the drive shaft 5 by screwing or driving a cotter pin, and the spring 24 is not necessary.

【００２２】次に、以上のように構成したレバー式巻上
牽引装置の作用について説明する。先ず、荷揚げ作業を
行う場合には、前記操作ハンドル１８を前記駆動部材８
に対し近接する第１位置に移動させ、前記操作レバー１
６に設けた操作部１５の操作で前記送り爪片１４の送り
側爪を前記駆動部材８の歯部８ａに係合させて、前記レ
バー１６の揺動操作を行うことにより、前記駆動部材８
が正転方向に回転されるのであり、そして、この正回転
時には、前記駆動部材８が、図１左側方向、即ち、前記
従動部材７側に螺進し、前記メカニカルブレーキ１３が
作動して、前記駆動部材８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、該ロードシーブ３の回転に伴い、
該ロードシーブ３に掛回したチェンに接続した荷物など
の荷揚作業が行われる。Next, the operation of the lever hoisting and pulling device configured as described above will be described. First, when performing the unloading work, the operation handle 18 is connected to the drive member 8.
The operating lever 1
By operating the operation unit 15 provided on the drive member 6, the feed side claw of the feed claw piece 14 is engaged with the tooth portion 8 a of the drive member 8, and the lever 16 is swung, whereby the drive member 8 is rotated.
Is rotated in the forward direction, and at the time of the forward rotation, the driving member 8 is screwed in the leftward direction in FIG. 1, that is, the driven member 7 side, and the mechanical brake 13 is operated. Rotational power of the driving member 8 is transmitted from the driving shaft 5 to the load sheave 3 via the reduction gear mechanism 6 and the cylindrical shaft 4, and with the rotation of the load sheave 3,
The unloading work of the luggage or the like connected to the chain hung on the load sheave 3 is performed.

【００２３】また、荷下作業を行う場合には、前記操作
ハンドル１８を前記第１位置に移動させた状態で、前記
操作部１５における送り爪片１４の戻し側爪を前記駆動
部材８の前記歯部８ａに係合させて、前記レバー１６を
揺動操作することにより、前記駆動部材８が逆転方向に
回転されるのであって、このとき前記係合突起３１は、
図４の仮想線で示した位置、即ち、第１規制面３３と第
２規制面３４との間に位置しているから、前記駆動部材
８は駆動軸５に対して第１規制面３３と第２規制面３４
との間で相対回転して、前記従動部材７に対して後退で
き、前記従動部材７の後退により、前記メカニカルブレ
ーキ１３の制動作動が中止されて、前記駆動軸５が駆動
部材８の逆転量だけ逆回転することができ、安全に荷下
作業が行われる。When performing the unloading operation, the return claw of the feed claw piece 14 in the operation section 15 is moved to the first position of the drive member 8 while the operation handle 18 is moved to the first position. The driving member 8 is rotated in the reverse direction by swinging the lever 16 by engaging with the tooth portion 8a. At this time, the engagement protrusion 31
4, that is, between the first regulating surface 33 and the second regulating surface 34, the driving member 8 is in contact with the driving shaft 5 with the first regulating surface 33. Second regulation surface 34
Relative rotation between the driven member 7 and the driven member 7, the retraction of the driven member 7 causes the braking operation of the mechanical brake 13 to be stopped, and the drive shaft 5 Can be rotated only in the reverse direction, and the unloading operation is performed safely.

【００２４】次に、前記ロードシーブ３を遊転状態にし
て、該ロードシーブ３に掛回した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 load sheave 3 is set in the idle state and the chain extended around the load sheave 3 is freely extended or shortened toward the load side.

【００２５】この場合、前記送り爪片１４は中立位置に
位置させるのであって、この状態で前記操作ハンドル１
８を前記ばね１９の軸方向付勢力に抗して前記ストッパ
ー１７側、即ち、駆動部材８に対し離反する第２位置へ
と引出す。この引出しにより、前記操作ハンドル１８に
設けた前記突起３１が前記第１及び第２規制面３３，３
４に対し規制されない規制解除位置に移動するのであ
り、この規制解除と、前記送り爪片１４の中立位置への
切換えとにより前記駆動部材８は、前記ばね１９の捩り
方向の付勢力でブレ−キ弛緩方向（図４点線矢印方向）
に回転し、図５に示した状態になる。In this case, the feed pawl piece 14 is located at the neutral position.
8 is pulled out to the stopper 17 side, that is, the second position separated from the driving member 8 against the axial urging force of the spring 19. As a result, the protrusion 31 provided on the operation handle 18 is moved to the first and second regulating surfaces 33 and 3.
The driving member 8 is moved to a restriction releasing position where the driving member 8 is not restricted by the spring 4, and the driving member 8 is moved by the urging force of the spring 19 in the torsional direction. Key relaxation direction (Figure 4 dotted arrow direction)
To the state shown in FIG.

【００２６】従って、前記ばね１９のばね力を、前記送
り爪片１４を中立位置とした駆動部材８をブレ−キ弛緩
位置に回転させ得るばね力とすることにより、前記操作
ハンドル１８を第２位置に引出すだけで前記駆動部材８
を回転させて前記従動部材７から離れる方向に螺退さ
せ、前記メカニカルブレ−キ１３による制動作用を解除
して、前記ロードシーブ３を遊転状態にできるのであ
る。しかも、このとき、前記突起３１は図４点線で示し
た位置から図５点線で示した位置に移動して前記駆動部
材８の遊転制御面３５に対向するのであって、この状態
で前記操作ハンドル１８の引出し操作を解放すると、前
記ばね１９の軸方向の付勢力で前記操作ハンドル１８が
駆動部材８の方向に押圧され、前記突起３１の突出先端
面が図７に示したように前記駆動部材８に設けた前記突
出部３２の遊転制御面３５に弾接するのであり、この弾
接による摩擦抵抗により前記ロードシーブ３の遊転状態
が保持されるのである。従って、このように遊転状態を
保持できるから前記チェンを引張り、負荷側チェンの迅
速な伸長や短縮を行う遊転制御時、前記チェンの引張り
力の入力範囲は、従来例に比較して広くできるのであっ
て、熟練を要することなく負荷側チェンの伸長及び短縮
調整ができるのである。Accordingly, by setting the spring force of the spring 19 to a spring force capable of rotating the driving member 8 with the feed claw piece 14 in the neutral position to the brake relaxation position, the operation handle 18 is moved to the second position. The drive member 8 is simply pulled out to the position.
Rotate by unscrewing in a direction away from the driven member 7, the mechanical Nikaru shake - Cancel the braking action by the key 13, the it can be the load sheave 3 in the free rotation state. In addition, at this time, the projection 31 moves from the position shown by the dotted line in FIG. 4 to the position shown by the dotted line in FIG. 5 and faces the idle rotation control surface 35 of the driving member 8. When the pulling-out operation of the handle 18 is released, the operating handle 18 is pressed in the direction of the drive member 8 by the biasing force of the spring 19 in the direction of the drive member 8, and the protruding distal end surface of the projection 31 is moved as shown in FIG. The load sheave 3 is elastically contacted with the idle control surface 35 of the projecting portion 32 provided on the member 8, and the idle state of the load sheave 3 is maintained by frictional resistance due to the elastic contact. Therefore, since the idle state can be maintained in this way, the chain is pulled, and at the time of idle rotation control in which the load-side chain is quickly extended or shortened, the input range of the tensile force of the chain is wider than the conventional example. The extension and shortening adjustment of the load side chain can be performed without skill.

【００２７】また、前記駆動部材８に設けた前記突出部
３２には前記第３規制面３６を設けて、前記突出部３２
の遊転制御面３５に前記係合突起３１の突出先端面が弾
接した状態で前記駆動部材８が前記ばね１９の捩り付勢
力により駆動軸５に対して相対回転するとき、前記係合
突起３１の回転方向前部を、前記第３規制面３６により
それ以上の回転を規制するようにしているから、前記駆
動部材８のばね１９による回転の回転角度を制限するこ
とができ、前記駆動部材８と従動部材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。The projecting portion 32 provided on the driving member 8 is provided with the third regulating surface 36 so that the projecting portion 32
When the drive member 8 is relatively rotated with respect to the drive shaft 5 by the torsional biasing force of the spring 19 in a state where the protruding distal end surface of the engagement projection 31 elastically contacts the idle rotation control surface 35, the engagement projection Since the further rotation of the front portion in the rotation direction of 31 is regulated by the third regulating surface 36, the rotation angle of the rotation of the drive member 8 by the spring 19 can be limited, and the drive member The distance between the driven sheave 8 and the driven member 7 can be prevented from being unnecessarily wider than the distance required for the load sheave 3 to idle.

【００２８】更に、以上のように遊転制御をしている状
態で前記チェンの引張り力を強くし、前記ロードシーブ
３に逆転方向の強い力を作用させるときは、前記係合突
起３１の突出先端面と前記遊転制御面３５と弾接がスリ
ップして解除され、前記係合突起３１が第１規制面３３
と第２規制面３４との間に戻って、前記したように、前
記メカニカルブレーキ１３の制動作動が行われたり、中
止されたり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、前記駆動部材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、前記遊転制御面３５が前記ばね１９の捩り付勢力に
打勝って係合突起３１に対し滑り前記駆動部材８は前記
操作ハンドル１８の回転に対して少し遅れて回転を始め
ることになり、この結果、前記係合突起３１の突出先端
面と前記遊転制御面３５と弾接が解除されて、前記係合
突起３１が第１規制面３３と第２規制面３４との間に戻
ることになるのである。Further, when the pulling force of the chain is increased while the idle rotation control is being performed as described above, and a strong force is applied to the load sheave 3 in the reverse rotation direction, the protrusion of the engagement projection 31 The leading end surface and the idle control surface 35 are released from the elastic contact by slipping, and the engagement protrusion 31 is moved to the first regulating surface 33.
Then, the control returns to the position between the second control surface 34 and the second control surface 34, and returns to the state where the braking operation of the mechanical brake 13 can be performed or stopped as described above. That is, when a strong force in the reverse rotation direction acts on the load sheave 3 in the idle state, the driving member 8 is screwed to the driving shaft 5, and its rotational inertia force is larger than that of the driving shaft 5. Therefore, the idle control surface 35 overcomes the torsional biasing force of the spring 19 and slides against the engagement projection 31, so that the drive member 8 starts to rotate slightly behind the rotation of the operation handle 18. As a result, the projecting tip surface of the engagement protrusion 31 and the idle rotation control surface 35 are released from elastic contact, and the engagement protrusion 31 returns between the first restriction surface 33 and the second restriction surface 34. It will be.

【００２９】また、以上の遊転制御によりロードチェン
の長さを調節して、このロードチェンを緊張させた後、
荷揚げしたり牽引したりする場合には前記送り爪片１４
を中立位置から送り位置に切換え、送り側爪を前記駆動
部材８の歯部８ａに係合させて、前記操作レバ−１６を
操作することにより前記メカニカルブレ−キ１３を作動
状態に容易に復帰させられる。即ち、前記送り側爪を前
記駆動部材８の歯部８ａに係合させた状態で操作レバ−
１６を操作すると、前記駆動軸５は前記ロードチェンの
緊張で回転抵抗が与えられるから、前記駆動部材８が正
転方向、つまり送り方向に回転して螺退し、前記メカニ
カルブレ−キ１３が作動するのであって、このメカニカ
ルブレ−キ１３を介して前記ロードシーブ３を駆動回転
させ、荷揚げしたり、牽引したりすることができるので
ある。Further, the length of the load chain is adjusted by the above-mentioned idle rotation control, and the load chain is tensioned.
When unloading or towing, the feed claw piece 14 is used.
Is switched from the neutral position to the feed position, the feed-side pawl is engaged with the tooth portion 8a of the drive member 8, and the operating lever 16 is operated to easily return the mechanical brake 13 to the operating state. Let me do. That is, when the feed pawl is engaged with the tooth portion 8a of the drive member 8, the operation lever is moved.
When the drive shaft 16 is operated, a rotational resistance is given to the drive shaft 5 by the tension of the load chain. Therefore, the drive member 8 rotates in the normal rotation direction, that is, the feed direction, and retreats, and the mechanical brake 13 is moved. By operating, the load sheave 3 can be driven and rotated by this mechanical brake 13 to unload or tow.

【００３０】また、この荷揚げ又は牽引時、前記操作ハ
ンドル１８を引出して遊転操作をしようとしても、前記
送り爪片１４の送り側爪が駆動部材８の歯部８ａに噛合
っている以上、遊転制御状態にはならない。Also, even if the operation handle 18 is pulled out to perform the idle operation at the time of unloading or towing, the feed claw of the feed claw piece 14 is engaged with the tooth portion 8a of the drive member 8 as long as it is engaged. It does not enter the idle control state.

【００３１】更に荷揚げ又は牽引時、前記送り爪片１４
を中立位置に切換えて操作ハンドル１８を引出して遊転
操作する場合、前記駆動部材８が前記ばね１９の捩り方
向の付勢力で回転しブレ−キが弛緩することがあって
も、ロードシーブ３に作用する逆転方向の負荷が大きい
ときには、前記ロードチェンを強く引張った場合と同
様、メカニカルブレ−キ１３が作動することになる。
尚、前記操作ハンドル１８の内側端部に係止用フランジ
部を設けると共に、前記送り爪片１４の操作部１５に送
り位置及び戻し位置への操作時、前記フランジ部が係合
し、前記操作ハンドル１８の引出し操作を不能にし、中
立位置への操作時のみ引出し操作を可能にする誤操作防
止片を設けるのが好ましい。Further, at the time of unloading or towing, the feed claw piece 14
Is switched to the neutral position and the operation handle 18 is pulled out for idling operation, even if the drive member 8 is rotated by the biasing force of the spring 19 in the torsional direction and the brake is loosened, When the load acting in the reverse direction is large, the mechanical brake 13 operates as in the case where the load chain is strongly pulled.
In addition, a locking flange portion is provided at an inner end portion of the operation handle 18, and the flange portion is engaged with the operation portion 15 of the feed claw piece 14 at the time of operation to the feed position and the return position, and It is preferable to provide an erroneous operation preventing piece that disables the pull-out operation of the handle 18 and enables the pull-out operation only when the handle 18 is operated to the neutral position.

【００３２】以上のように、前記送り爪片１４を中立位
置に切換えて操作ハンドル１８を引だすだけの簡単な操
作で、前記駆動部材８を回動させてメカニカルブレ−キ
１３による制動作用を解除し、前記ロードシーブ３を遊
転状態に制御できるから、遊転操作を簡便にできるし、
また、不慣れな操作者でも誤動作なく遊転操作を行える
のであって、その操作性を向上できるし、また、前記ば
ね１９の軸方向付勢で遊転状態を保持できるから、遊転
制御時においてロードチェンを引張って負荷側長さを調
整するとき、その引張り力の入力範囲を広げられ、従っ
て、遊転制御時のチェン長さ調整も熟練を要することな
く行えるのである。As described above, the driving member 8 is rotated by a simple operation of switching the feed pawl piece 14 to the neutral position and pulling out the operation handle 18 so that the braking action of the mechanical brake 13 is performed. Release, and the load sheave 3 can be controlled to the idle state, so that the idle operation can be simplified,
Further, even an unskilled operator can perform the idle operation without malfunction, and the operability can be improved, and since the idle state can be maintained by the axial bias of the spring 19, the idle operation can be performed during the idle control. When adjusting the load side length by pulling the load chain, the input range of the pulling force can be widened, so that the chain length adjustment during idle rotation control can be performed without skill.

【００３３】さらに、以上のような遊転制御時に、前記
操作ハンドル１８を第２位置に移動させたときには、こ
の操作ハンドル１８の移動操作に伴い前記筒状覆い部１
８ａが追従移動され、これにより図７で示すように前記
操作レバー１３の突出筒１６ｂに設けた遊転表示部３７
が外部表出されるのであり、従って、前記操作ハンドル
１８が第２位置側に位置されていて前記ロードシーブ３
が遊転制御状態にあることを外部から容易に判断するこ
とができ、また、前記遊転表示部３７が前記ハンドル１
８の筒状覆い部１８ａで覆われていて外部から見えない
ときには、前記操作ハンドル１８が第１位置側にあって
前記ロードシーブ３が荷揚げ荷下しが行われる定常運転
状態にあることを容易に判断できるのであり、このた
め、作業者の誤操作をなくすことができるのである。Further, when the operation handle 18 is moved to the second position during the idle rotation control as described above, the cylindrical cover 1 is moved with the operation operation of the operation handle 18.
8a is caused to follow, whereby the idle display portion 37 provided on the protruding cylinder 16b of the operation lever 13 as shown in FIG.
Is externally exposed. Therefore, when the operation handle 18 is located at the second position side and the load sheave 3 is
Can be easily determined from the outside to be in the idle control state, and the idle display portion 37 is provided with the handle 1.
When it is not visible from the outside because it is covered with the cylindrical covering portion 18a, it is easy to set the operation handle 18 in the first position side and to be in a steady operation state in which the load sheave 3 is unloaded. Therefore, it is possible to eliminate the erroneous operation of the operator.

【００３４】また、以上説明した実施例は、前記係合突
起３１を操作ハンドル１８に設け、遊転制御面３５を駆
動部材８に設けたが、逆でもよいし、また、前記第１ス
リーブ２５に鍔２５ａを設け、この鍔２５ａにより前記
操作ハンドル１８に作用する前記ばね１９の軸方向付勢
力を受止めるようにし、通常の使用時前記駆動部材８に
前記軸方向付勢力が作用しないようにしたが、前記鍔２
５ａをなくしてもよい。In the embodiment described above, the engaging projection 31 is provided on the operating handle 18 and the idle rotation control surface 35 is provided on the driving member 8. However, the reverse may be adopted. Is provided with a flange 25a, which receives the axial biasing force of the spring 19 acting on the operation handle 18 so that the axial biasing force does not act on the drive member 8 during normal use. But said Tsuba 2
5a may be eliminated.

【００３５】次に、図８乃至図１４に示した第２実施例
を説明する。この第２実施例は、前記操作ハンドル１８
を前記駆動部材８に対し近接する第１位置の方向に付勢
する遊転用第１ばね４９と、前記駆動部材８をブレ−キ
弛緩方向に付勢する遊転用第２ばね５０とを別個に設
け、前記第１ばね４９を前記操作ハンドル１８とストッ
パー１７との間に介装し、前記第２ばね５０を前記駆動
部材８と操作ハンドル１８との間に介装し、前記操作ハ
ンドル１８を第２位置に操作したとき、前記駆動部材８
をブレ−キ弛緩方向に付勢するように構成したものであ
る。Next, a second embodiment shown in FIGS. 8 to 14 will be described. In the second embodiment, the operation handle 18
The first idler spring 49 for urging the drive member 8 in the direction of the first position close to the drive member 8 and the second spring 50 for idler for urging the drive member 8 in the brake relaxation direction are separately provided. The first spring 49 is interposed between the operation handle 18 and the stopper 17, the second spring 50 is interposed between the drive member 8 and the operation handle 18, and the operation handle 18 is When operated to the second position, the driving member 8
Are biased in the brake relaxation direction.

【００３６】更に詳記すると、前記第２ばね５０は第１
実施例の遊転用ばね１９と同様、１対のばね足５０ａ，
５０ｂをもつコイルばねから構成すると共に、前記スリ
ーブ２５をなくして該スリーブ２５を挿嵌していた前記
駆動部材８の凹陥部に前記第２ばね５０のコイル部を、
前記操作ハンドル１８の第１位置では軸方向反力が得ら
れるように内装するのである。そして、前記駆動部材８
に設ける前記突出部３２には、図１１乃至図１３に示し
たように前記第２ばね５０の各ばね足５０ａ及び５０ｂ
を係止する凹部から成る第１係止部５１及び第２係止部
５２を設け、前記第１係止部５１の凹部深さを深くして
前記第１ばね足５０ａを前記駆動部材８の外側端面に沿
わせて引出して係止すると共に、前記第２係止部５２の
凹部深さは、前記第１係止部５１より浅くし、この凹部
を形成する凹部壁面のうち前記駆動部材８のブレ−キ弛
緩方向に位置する凹部壁面５２ａを、そのブレ−キ弛緩
方向の回転で前記第２ばね５０ｂの係止が解除されるよ
うに傾斜状として、この第２係止部５２に前記第２ばね
足５０ｂを前記コイル部に捩り反力が生ずるように係止
するのであって、この第２係止部５２により第２ばね足
５０ｂが係止されることにより前記第２ばね５０による
駆動部材８のブレ−キ弛緩方向への付勢は中断されるこ
とになる。More specifically, the second spring 50 is a first spring.
Similar to the idle spring 19 of the embodiment, a pair of spring feet 50a,
50b, the coil portion of the second spring 50 is inserted into the recessed portion of the drive member 8 into which the sleeve 25 is inserted and the sleeve 25 is inserted.
At the first position of the operating handle 18, the operation handle 18 is installed so as to obtain an axial reaction force. And the driving member 8
As shown in FIGS. 11 to 13, the projections 32 provided on the second spring 50 have respective spring legs 50a and 50b.
The first locking portion 51 and the second locking portion 52 are formed by concave portions for locking the first spring portion 50. The depth of the concave portion of the first locking portion 51 is increased, and the first spring foot 50a is The second locking portion 52 is pulled out and locked along the outer end surface, and the depth of the concave portion of the second locking portion 52 is made shallower than that of the first locking portion 51. The concave wall surface 52a positioned in the brake relaxing direction is inclined so that the locking of the second spring 50b is released by the rotation in the brake relaxing direction. The second spring leg 50b is locked so that a torsional reaction force is generated in the coil portion. The second locking portion 52 locks the second spring leg 50b, so that the second spring 50 The biasing of the driving member 8 in the brake relaxing direction is interrupted.

【００３７】また、前記第２ばね足５０ｂは、前記第２
係止部５２による係止部位を越えて径方向外方に延長さ
れ、前記操作ハンドル１８に設ける前記係合突起３１に
係止可能となっており、従って、前記操作ハンドル１８
を第２位置に引出したとき、前記第２ばね５０の軸方向
反力により前記第２ばね足５０ｂは軸方向外方に復帰移
動すると同時に、捩り反力で前記第２係止部５２から離
脱し、前記係合突起３１に係止されることになる。The second spring foot 50b is connected to the second spring foot 50b.
The operation handle 18 is extended radially outward beyond the engagement portion by the engagement portion 52 and can be engaged with the engagement protrusion 31 provided on the operation handle 18.
When the second spring 50 is pulled out to the second position, the second spring foot 50b returns to the axially outward direction due to the axial reaction force of the second spring 50, and simultaneously detaches from the second locking portion 52 by the torsional reaction force. Then, it is locked by the engagement protrusion 31.

【００３８】つまり、前記第２係止部５２による係止が
解除されて前記操作ハンドル１８の係止突起３１に係止
されると、この操作ハンドル１８を基に前記駆動部材８
が第２ばね５０の捩り反力でブレ−キ弛緩方向に付勢さ
れることになる。That is, when the locking by the second locking portion 52 is released and locked by the locking projection 31 of the operation handle 18, the driving member 8 is operated based on the operation handle 18.
Is urged in the brake relaxing direction by the torsional reaction force of the second spring 50.

【００３９】尚、前記第２ばね足５０ｂの第２係止部５
２への係止時、前記第２ばね足５０ｂの延長部と係合突
起３１との間には図１１のように隙間が生ずるのであっ
て、巻下げ又は牽引解除時には、このばね足５０ｂを撓
ませることなくメカニカルブレ−キ１３の作動解除が可
能となる。The second locking portion 5 of the second spring foot 50b
11, a gap is formed between the extended portion of the second spring foot 50b and the engagement projection 31 as shown in FIG. Operation of the mechanical brake 13 can be released without bending.

【００４０】そして、以上のような第２実施例において
も、第１実施例の場合と同様に、前記操作レバー１３の
ボス部１６ａに、前記操作ハンドル１８に向かって突出
する突出筒１６ｂを設けると共に、前記操作ハンドル１
８に前記突出筒１６ｂを覆う筒状覆い部１８ａを設け
て、前記突出筒１６ｂに前記操作ハンドル１８の第２位
置への操作時に前記覆い部１８ａの移動で表出する遊転
表示部３７を設けるのであって、前記ハンドル１８を第
２位置側に移動させて遊転制御を行うとき、このハンド
ル１８の移動操作に伴う前記覆い部１８ａの追従移動に
より前記遊転表示部３７を外部に表出させ、この外部表
出により前記操作ハンドル１８が第２位置側に位置され
ていて前記ロードシーブ３が遊転制御状態にあることを
外部から判断できるようになすのである。In the second embodiment as described above, similarly to the first embodiment, the boss 16a of the operating lever 13 is provided with a projecting cylinder 16b projecting toward the operating handle 18. Together with the operation handle 1
8 is provided with a cylindrical covering portion 18a for covering the protruding tube 16b, and the idle display portion 37, which is exposed by the movement of the covering portion 18a when the operation handle 18 is operated to the second position, is provided on the protruding tube 16b. When the idle rotation control is performed by moving the handle 18 to the second position side, the idle display portion 37 is externally displayed by the follow-up movement of the cover portion 18a accompanying the movement operation of the handle 18. With this external expression, it is possible to externally determine that the operation handle 18 is located at the second position side and the load sheave 3 is in the idle control state.

【００４１】以上のような第２実施例によれば、第１実
施例と同様操作ハンドル１８を第２位置に引出すだけの
簡単な操作で遊転制御ができる利点が得られながら、前
記操作ハンドル１８が第２位置に引出されない限り、前
記操作レバ−１６の送り爪１４を中立位置に切換えて
も、前記駆動部材８にはブレ−キ弛緩方向への付勢力が
作用しないのであるから、前記メカニカルブレ−キ１３
が不用意に弛緩されることはない利点を有することにな
る。According to the second embodiment described above, similar to the first embodiment, there is obtained an advantage that idle rotation can be controlled by a simple operation of pulling out the operating handle 18 to the second position. As long as 18 is not pulled out to the second position, even if the feed pawl 14 of the operation lever 16 is switched to the neutral position, no urging force acts on the drive member 8 in the brake relaxation direction. Mechanical brake 13
Has the advantage that it is not inadvertently relaxed.

【００４２】即ち、第２実施例による遊転作用は第１実
施例と同様、操作レバ−１６の送り爪１４を中立位置に
切換えて操作ハンドル１８を第２位置に引出すだけで前
記第２ばね５０の捩り作用で前記駆動部材８をブレ−キ
弛緩方向に回転させ、前記メカニカルブレ−キ１３を弛
緩することができるし、また、第２位置において前記係
合突起３１が前記遊転制御面３５に第１ばね４９の軸方
向付勢力で弾接し、遊転保持ができるのであり、その上
に前記第１ばね４９とは別に前記第２ばね５０を設け、
操作ハンドル１８が第１位置に位置するときには前記駆
動部材８に設ける前記第２係止部５２で係止し、駆動部
材８のブレ−キ弛緩方向への付勢を中断するようにした
から、前記送り爪１４を中立位置に切換えても前記操作
ハンドル１８を第２位置に引出さない限り前記駆動部材
８がブレ−キ弛緩方向に回転することはない利点を有す
ることになる。That is, the idle action according to the second embodiment is the same as in the first embodiment by simply switching the feed pawl 14 of the operation lever 16 to the neutral position and pulling out the operation handle 18 to the second position. By rotating the driving member 8 in the brake relaxing direction by the torsional action of 50, the mechanical brake 13 can be relaxed, and at the second position, the engaging projection 31 is moved by the idle control surface. 35 can be elastically contacted with the first spring 49 by the axial biasing force of the first spring 49, so that idle rotation can be maintained. On top of that, the second spring 50 is provided separately from the first spring 49.
When the operation handle 18 is located at the first position, the operation handle 18 is locked by the second locking portion 52 provided on the drive member 8, so that the biasing of the drive member 8 in the brake relaxation direction is interrupted. Even if the feed pawl 14 is switched to the neutral position, there is an advantage that the driving member 8 does not rotate in the brake relaxing direction unless the operation handle 18 is pulled out to the second position.

【００４３】さらに、以上のような遊転制御時に、前記
操作ハンドル１８を第２位置に移動させたときには、実
施例１の場合と同様に、この操作ハンドル１８に伴う前
記筒状覆い部１８ａの追従移動により、図１４で示すよ
うに前記操作レバー１３の突出筒１６ｂに設けた遊転表
示部３７が外部表出されるのであり、従って、前記操作
ハンドル１８が第２位置側に位置されていて前記ロード
シーブ３が遊転制御状態にあることを外部から容易に判
断することができるし、また、前記操作ハンドル１８が
第１位置側にあって前記ロードシーブ３が荷揚げ荷下し
が行われる定常運転状態にあることを容易に判断するこ
とができる。Further, when the operation handle 18 is moved to the second position during the idle rotation control as described above, as in the case of the first embodiment, the cylindrical cover 18a associated with the operation handle 18 is moved. By the follow-up movement, as shown in FIG. 14, the idle display portion 37 provided on the protruding cylinder 16b of the operation lever 13 is externally exposed. Therefore, the operation handle 18 is located at the second position side. It can be easily determined from the outside that the load sheave 3 is in the idle rotation control state, and the operation handle 18 is located at the first position side so that the load sheave 3 is unloaded. It can be easily determined that the vehicle is in the steady operation state.

【００４４】尚、図８及び図１３，１４において５３は
前記第２ばね５０を受止めるばね受座金である。In FIGS. 8, 13 and 14, reference numeral 53 denotes a spring washer for receiving the second spring 50.

【００４５】又、第２実施例において前記第２ばね５０
の第２ばね足５０ｂを、前記操作ハンドル１８の係合突
起３１に係合可能としたが、前記操作ハンドル１８のボ
ス部２８に、長孔状の係止孔を設けてもよい。前記係合
突起３１を利用して前記第２ばね足５０ｂを係合するよ
うに構成すれば、長孔状の係止孔をわざわざ設ける必要
がないから、それだけ構造簡単にできる。In the second embodiment, the second spring 50
Although the second spring foot 50b can be engaged with the engagement projection 31 of the operation handle 18, an elongated locking hole may be provided in the boss portion 28 of the operation handle 18. If the second spring foot 50b is configured to be engaged by using the engagement protrusion 31, it is not necessary to provide a long hole-shaped locking hole, so that the structure can be simplified accordingly.

【００４６】更に、第２実施例のように、第１ばね４９
と第２ばね５０とを別個に形成する場合、前記第２ばね
５０は、図１５に示すように、同一平面で螺旋状に捻じ
られた捩り部５０ｃと、この捩り部５０ｃの両端に位置
する第１及び第２ばね足５０ｄ，５０ｅとにより形成
し、前記第１ばね足５０ｄを前記捩り部５０ｃに対し軸
方向に直角状に屈曲させて、前記駆動部材８の第１規制
面３３に係合させるのであり、また、前記第２ばね足５
０ｅは、前記捩り部５０ｃに対し径方向に屈曲させて前
記操作ハンドル１８の係合突起３１に係合させるのであ
る。Further, as in the second embodiment, the first spring 49
In the case where the second spring 50 and the second spring 50 are formed separately, as shown in FIG. 15, the second spring 50 is located at both ends of the twisted portion 50c which is spirally twisted on the same plane and at both ends of the twisted portion 50c. The first spring leg 50d is formed by first and second spring legs 50d and 50e, and the first spring leg 50d is bent at a right angle in the axial direction with respect to the torsion portion 50c to engage with the first regulating surface 33 of the driving member 8. And the second spring foot 5
0e is to bend in the radial direction with respect to the torsion portion 50c to engage with the engagement protrusion 31 of the operation handle 18.

【００４７】この場合、前記第２ばね足５０ｃは前記操
作ハンドル１８の位置如何に拘らず、つまり第２位置に
位置する場合は勿論、第１位置に位置する場合でも前記
係合突起３１に係合させるのであって、前記駆動部材８
は、前記第２ばね５０の捩り方向付勢力が常時作用する
ことになる。また、前記ばね足を前記駆動部材８に直接
係止する以外、駆動部材８と一体的に回転可能とする別
部材を介して間接的に係止してもよい。In this case, the second spring foot 50c engages with the engaging projection 31 regardless of the position of the operation handle 18, that is, not only when it is located at the second position but also when it is located at the first position. The driving member 8
Means that the urging force of the second spring 50 in the torsional direction always acts. In addition to directly locking the spring foot to the driving member 8, the spring foot may be locked indirectly via another member that can rotate integrally with the driving member 8.

【００４８】次に、図１６に示した第３実施例について
説明する。この第３実施例は、以上のような遊転制御機
構を備えると共に、前記駆動部材８に定格負荷を調整可
能とした過負荷防止機構６０を設けたものである。この
過負荷防止機構６０は、前記駆動軸５における従動部材
７の外方側にメカニカルブレーキ押え７０を螺着し、該
ブレーキ押え７０上に前記駆動部材８を一方向回転機構
７１を介して回転可能に支持すると共に、前記ブレーキ
押え７０と駆動部材８との間に、前記過負荷防止機構６
０として、一対の摩擦板６１，６２と押え板６３及び弾
性部材６４と、これら各者の外方側に位置され、前記ブ
レーキ押え７０のねじ部に螺合された調整部材６５とを
介装させるのである。そして、前記整部材６５を前記ブ
レーキ押え７０のねじ部に沿って螺回し、前記弾性部材
６４による前記各摩擦板６１，６２の前記ブレーキ押え
７０や駆動部材８に対する摩擦抵抗を調整することによ
り定格負荷を調整して、この定格負荷以上の荷物の巻上
げ時には、前記各摩擦板６１，６２を前記ブレーキ押え
７０や駆動部材８に対しスリップさせて巻上げをできな
いようにしたのである。Next, a third embodiment shown in FIG. 16 will be described. In the third embodiment, the idle rotation control mechanism described above is provided, and the drive member 8 is provided with an overload prevention mechanism 60 capable of adjusting the rated load. The overload prevention mechanism 60 has a mechanical brake retainer 70 screwed on the drive shaft 5 outside the driven member 7, and rotates the drive member 8 on the brake retainer 70 via a one-way rotating mechanism 71. And an overload prevention mechanism 6 between the brake presser 70 and the driving member 8.
As 0, a pair of friction plates 61, 62, a holding plate 63, and an elastic member 64, and an adjusting member 65 located on the outer side of each of these members and screwed to the threaded portion of the brake press 70 are interposed. Let it do. Then, the adjusting member 65 is screwed along the thread portion of the brake presser 70, and the frictional resistance of the friction plates 61 and 62 by the elastic member 64 to the brake presser 70 and the driving member 8 is adjusted. The load is adjusted to prevent the friction plates 61 and 62 from slipping with respect to the brake presser 70 and the drive member 8 when the load having the rated load or more is hoisted.

【００４９】そして、以上のような第３実施例において
も、前述した場合と同様に、前記操作レバー１３のボス
部１６ａに、前記操作ハンドル１８に向かって突出する
突出筒１６ｂを設けると共に、前記操作ハンドル１８に
前記突出筒１６ｂを覆う筒状覆い部１８ａを設けて、前
記突出筒１６ｂに前記操作ハンドル１８の第２位置への
操作時に前記覆い部１８ａの移動で表出する遊転表示部
３７を設けるのであって、前記ハンドル１８を第２位置
側に移動させて遊転制御を行うとき、このハンドル１８
の移動操作に伴う前記覆い部１８ａの追従移動により前
記遊転表示部３７を外部に表出させ、この外部表出によ
り前記操作ハンドル１８が第２位置側に位置されていて
前記ロードシーブ３が遊転制御状態にあることを外部か
ら判断できるようになすのである。In the third embodiment as described above, similarly to the above-described case, the boss 16a of the operating lever 13 is provided with a projecting cylinder 16b projecting toward the operating handle 18, and The operation handle 18 is provided with a cylindrical cover portion 18a for covering the protruding tube 16b, and the idle display portion that appears on the protrusion tube 16b when the operation handle 18 is operated to the second position by the movement of the cover portion 18a. When the idle rotation control is performed by moving the handle 18 to the second position side, the handle 18
The idle display portion 37 is exposed to the outside by the follow-up movement of the cover portion 18a in accordance with the moving operation, and the operation handle 18 is positioned at the second position side by the externally exposed portion, so that the load sheave 3 is moved. That is, it can be determined from the outside that the vehicle is in the idle control state.

【００５０】[0050]

【発明の効果】以上説明したように本発明にかかるレバ
ー式巻上牽引機では、駆動部材８に遊転制御面３５を設
け、駆動軸５の軸端部には、前記駆動部材８と近接する
第１位置と離反する第２位置とにわたり軸方向移動のみ
可能で、第２位置への操作時前記遊転制御面３５に係合
して、前記駆動部材８をメカニカルブレーキ１３の非作
動位置に保持する操作ハンドル１８を備えると共に、操
作レバー１６のボス部１６ａに、前記操作ハンドル１８
に向かって突出する突出筒１６ｂを設け、前記操作ハン
ドル１８に前記突出筒１６ｂを覆う筒状覆い部１８ａを
設けて、前記突出筒１６ｂに前記操作ハンドル１８の第
２位置への操作時前記覆い部１８ａの移動で表出する遊
転表示部３７を設けたから、前記操作ハンドル１８を第
２位置側に移動させ、この駆動部材８の遊転制御面３５
に前記操作ハンドル１８を係合させて前記メカニカルブ
レーキ１３を非作動位置に保持することにより、前記ロ
ードシーブ３をフリー回転可能とする遊転状態に保持で
きるのであり、従って、斯かる遊転状態に保持すること
によって、前記ロードシーブ３に掛回されたロードチエ
ンの引張り力の入力範囲を拡げられ、熟練を要すること
なく、該ロードチエンを迅速に引出したり引戻したりし
て、その長さ調整を簡単に行うことができるのである。
しかも、以上のように、前記操作ハンドル１８を第２位
置に移動させて遊転制御を行うときには、この操作ハン
ドル１８の移動操作により該ハンドル１８に設けた筒状
覆い部１８ａが追従移動され、これに伴い前記操作レバ
ー１３の突出筒１６ｂに設けた遊転表示部３７が外部表
出されることから、前記操作ハンドル１８が第２位置側
に位置されていて前記ロードシーブ３が遊転制御状態に
あることを外部から容易に判断することができ、また、
前記遊転表示部３７が前記ハンドル１８の筒状覆い部１
８ａで覆われていて外部から見えないときには、前記操
作ハンドル１８が第１位置側にあって前記ロードシーブ
３が定常運転状態にあることを容易に判断できるのであ
り、このため、作業者の誤操作をなくすことができるの
である。As described above, in the lever-type hoisting and traction machine according to the present invention, the drive member 8 is provided with the idle rotation control surface 35, and the drive shaft 5 has a shaft end close to the drive member 8. Only in the axial direction between the first position and the second position away from the first position, and engages with the idle rotation control surface 35 when operating to the second position to move the drive member 8 to the non-operation position of the mechanical brake 13. The operation handle 18 is provided on the boss 16 a of the operation lever 16.
The operating handle 18 is provided with a cylindrical covering portion 18a for covering the projecting cylinder 16b, and the projecting cylinder 16b is provided with a cover when the operating handle 18 is operated to the second position. The operation handle 18 is moved to the second position side by providing the idle display portion 37 that appears by the movement of the portion 18a, and the idle control surface 35 of the drive member 8 is moved.
By holding the mechanical brake 13 at the non-operating position by engaging the operation handle 18 to the idle state, the load sheave 3 can be held in a free running state in which the free sheave can be freely rotated. , The input range of the tensile force of the load chain wrapped around the load sheave 3 can be expanded, and the length of the load chain can be quickly pulled out and pulled back without skill. Can be done easily.
Moreover, as described above, when the idle rotation control is performed by moving the operation handle 18 to the second position, the movement of the operation handle 18 causes the cylindrical cover portion 18a provided on the handle 18 to follow. Accordingly, the idle display portion 37 provided on the protruding cylinder 16b of the operation lever 13 is externally exposed, so that the operation handle 18 is located at the second position and the load sheave 3 is in the idle control state. Can be easily determined from the outside,
The idle display portion 37 is a cylindrical cover portion 1 of the handle 18.
When it is not visible from the outside because it is covered with 8a, it can be easily determined that the operation handle 18 is at the first position side and the load sheave 3 is in a steady operation state. Can be eliminated.

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

【図１】 本発明にかかるレバー式巻上牽引機の第１実
施例を示す縦断面図。FIG. 1 is a longitudinal sectional view showing a first embodiment of a lever type hoisting and pulling machine according to the present invention.

【図２】 操作ハンドルの正面図。FIG. 2 is a front view of an operation handle.

【図３】 ストッパーの正面図。FIG. 3 is a front view of a stopper.

【図４】 駆動部材と操作ハンドルに設ける係合突起及
び遊転用ばねとの通常使用時の位置関係を示す正面図。FIG. 4 is a front view showing a positional relationship between a driving member, an engagement protrusion provided on an operation handle, and a spring for idling during normal use.

【図５】 遊転制御時の位置関係を示す図４に対応した
正面図。FIG. 5 is a front view corresponding to FIG. 4 showing a positional relationship during idle control.

【図６】 図４におけるＡ−Ａ線断面図。FIG. 6 is a sectional view taken along line AA in FIG. 4;

【図７】 同レバー式巻上牽引機の遊転制御状態を示す
縦断面図。FIG. 7 is a vertical cross-sectional view showing an idle rotation control state of the lever type hoisting and pulling machine.

【図８】 第２実施例を示す縦断面図。FIG. 8 is a longitudinal sectional view showing a second embodiment.

【図９】 操作ハンドルの正面図。FIG. 9 is a front view of the operation handle.

【図１０】 ストッパーの正面図。FIG. 10 is a front view of a stopper.

【図１１】 駆動部材と操作ハンドルに設ける係合突起
及び遊転用第２ばねとの通常使用時の位置関係を示す正
面図。FIG. 11 is a front view showing the positional relationship between the driving member, the engagement projection provided on the operation handle, and the second idle spring for normal use.

【図１２】 遊転制御時の位置関係を示す図１１に対応
した正面図。FIG. 12 is a front view corresponding to FIG. 11, showing a positional relationship during idle control.

【図１３】 要部の分解斜視図。FIG. 13 is an exploded perspective view of a main part.

【図１４】 同レバー式巻上牽引機の遊転制御状態を示
す縦断面図。FIG. 14 is a vertical cross-sectional view showing an idle rotation control state of the lever type hoisting and pulling machine.

【図１５】 第２ばねの他例を示す斜視図。FIG. 15 is a perspective view showing another example of the second spring.

【図１６】 第３実施例を示す縦断面図。FIG. 16 is a longitudinal sectional view showing a third embodiment.

【符号の説明】[Explanation of symbols]

３ ロードシーブ ５
駆動軸 ７ 従動部材 ８
駆動部材 １３ メカニカルブレーキ １６
操作レバ− １６ａ ボス部 １６ｂ
突出筒 １８ 操作ハンドル １８ａ
覆い部 ３５ 遊転制御面 ３７
遊転表示部3 Road sheave 5
Drive shaft 7 Follower member 8
Drive member 13 Mechanical brake 16
Operation lever 16a Boss 16b
Projection tube 18 Operation handle 18a
Cover part 35 Idling control surface 37
Idling display

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 ロードシーブ（３）と、従動部材（７）
をもち前記ロードシーブ（３）を駆動する駆動軸（５）
と、この駆動軸（５）に螺着する駆動部材（８）と、こ
の駆動部材（８）と前記従動部材（７）との間に設ける
メカニカルブレーキ（１３）と、前記駆動部材（８）を
正逆方向に駆動する操作レバー（１６）とを備えたレバ
ー式巻上牽引機において、 前記駆動部材（８）は遊転制御面（３５）を備え、前記
駆動軸（５）の軸端部には、前記駆動部材（８）と近接
する第１位置と離反する第２位置とにわたり軸方向移動
のみ可能で、第２位置への操作時前記遊転制御面（３
５）に係合して、前記駆動部材（８）を前記メカニカル
ブレーキ（１３）の非作動位置に保持する操作ハンドル
（１８）を備えると共に、 前記操作レバー（１６）のボス部（１６ａ）に、前記操
作ハンドル（１８）に向かって突出する突出筒（１６
ｂ）を設け、前記操作ハンドル（１８）に前記突出筒
（１６ｂ）を覆う筒状覆い部（１８ａ）を設けて、前記
突出筒（１６ｂ）に前記操作ハンドル（１８）の第２位
置への操作時前記覆い部（１８ａ）の移動で表出する遊
転表示部（３７）を設けていることを特徴とするレバー
式巻上牽引機。1. A load sheave (3) and a driven member (7).
Drive shaft (5) for driving the load sheave (3)
A driving member (8) screwed to the driving shaft (5); a mechanical brake (13) provided between the driving member (8) and the driven member (7); and the driving member (8). And a control lever (16) for driving the drive shaft in the forward and reverse directions, wherein the drive member (8) includes an idle rotation control surface (35), and a shaft end of the drive shaft (5). The part can only move in the axial direction over a first position close to the drive member (8) and a second position away from the drive member (8), and the idle control surface (3) when operating to the second position.
5) an operating handle (18) for engaging the driving member (8) at a non-operating position of the mechanical brake (13) by engaging with the boss (16a) of the operating lever (16). , A projecting cylinder (16) projecting toward the operation handle (18).
b), and the operating handle (18) is provided with a cylindrical covering portion (18a) for covering the protruding cylinder (16b), and the protruding cylinder (16b) is moved to the second position of the operating handle (18). A lever-type hoisting and traction machine comprising an idle display section (37) that is exposed when the cover section (18a) is moved during operation.