WO2006103866A1 - Overload prevention device in hoist - Google Patents

Overload prevention device in hoist Download PDF

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Publication number
WO2006103866A1
WO2006103866A1 PCT/JP2006/303981 JP2006303981W WO2006103866A1 WO 2006103866 A1 WO2006103866 A1 WO 2006103866A1 JP 2006303981 W JP2006303981 W JP 2006303981W WO 2006103866 A1 WO2006103866 A1 WO 2006103866A1
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WO
WIPO (PCT)
Prior art keywords
drive
panel
overload prevention
overload
hoisting machine
Prior art date
Application number
PCT/JP2006/303981
Other languages
French (fr)
Japanese (ja)
Inventor
Desheng Xia
Koji Koyama
Original Assignee
Kito Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to JP2005-094851 priority Critical
Priority to JP2005-094070 priority
Priority to JP2005094070A priority patent/JP4698265B2/en
Priority to JP2005-094069 priority
Priority to JP2005094069A priority patent/JP4698264B2/en
Priority to JP2005094851A priority patent/JP4698266B2/en
Application filed by Kito Corporation filed Critical Kito Corporation
Priority claimed from CN2006800092740A external-priority patent/CN101146735B/en
Priority claimed from US11/886,313 external-priority patent/US7575223B2/en
Publication of WO2006103866A1 publication Critical patent/WO2006103866A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54Safety gear
    • B66D1/58Safety gear responsive to excess of load
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00Portable or mobile lifting or hauling appliances
    • B66D3/12Chain or like hand-operated tackles with or without power transmission gearing between operating member and lifting rope, chain or cable
    • B66D3/16Chain or like hand-operated tackles with or without power transmission gearing between operating member and lifting rope, chain or cable operated by an endless chain passing over a pulley or a sprocket

Abstract

An overload prevention device for a hoist has, between the inner peripheral surface of an operation means (9) and the outer peripheral surface of a drive member (10), a rotation drive member (11), a spring member (12), and a spring hold down member (13). The rotation drive member (11) has a means engaging with the drive member (10) and the operation means (9), transmitting drive of the operation means (9) to the drive member (10), and limiting, by torque of the operation means (9), torque to be transmitted to the drive member (10). The spring member (12) is formed between the back surface of the rotation drive member (11) and a spring hold down member (13), wound on the outer peripheral surface of the drive member (10) in a tubular space extending in an axial direction, and pressing the rotation drive member (11) to the drive member (10) side. The spring hold down member (13) is engaged with the drive member (10) and pressing an end of the spring member (12). Without increasing the size of the device, the rotation drive member (11) can be urged by the spring member (12) having a large stroke.

Description

明 細 書  Specification
巻上機における過負荷防止装置  Overload prevention device for hoisting machine
技術分野  Technical field
[0001] 本発明は、チェーンブロック等の卷上機における過負荷防止装置に関する。  The present invention relates to an overload prevention device for a hoist such as a chain block.
背景技術  Background art
[0002] 従来より、ロードシーブを駆動する駆動軸と、駆動軸に固定された受圧部材と、駆 動軸に進退可能に螺合された駆動部材と、駆動部材に回転可能に嵌合され、ハンド ホイール等の駆動輪の駆動を押圧駆動部材に伝達する回転駆動部材を備えた卷上 機は公知である。このような卷上機において、吊荷の制限荷重の調整を容易にし、か つ、過負荷状態になった場合にも、巻き降しを容易に行うための過負荷防止装置とし て、押圧駆動部材と回転駆動部材に対して付勢力を付与する皿パネを備えたものが 知られている。 (例えば、特許文献 1参照)  Conventionally, a drive shaft that drives a load sheave, a pressure receiving member fixed to the drive shaft, a drive member that is screwed to the drive shaft so as to be able to advance and retract, and a drive member that is rotatably fitted, A hoisting machine including a rotary driving member that transmits driving of a driving wheel such as a hand wheel to a pressing driving member is known. In such a hoisting machine, it is easy to adjust the limit load of the suspended load, and as an overload prevention device for easily unwinding even in the overload state, press drive One having a pan panel for applying an urging force to a member and a rotary drive member is known. (For example, see Patent Document 1)
以下、特許文献 1に記載された過負荷防止装置について、図 14及び図 15を参照 して説明する。  Hereinafter, the overload prevention device described in Patent Document 1 will be described with reference to FIG. 14 and FIG.
[0003] 図 14は、従来の卷上機を示す正面図、図 15は、卷上機の過負荷防止装置の主要 部を示す分解斜視図である。図 14において、ロードシーブ 21には駆動軸 22が回転 可能に揷通されている。駆動軸 22には、ネジ部 22aが形成され、ネジ部 22aには、口 ードシーブ 21に近い方から、受圧部材 24と駆動部材 30とが螺合されており、受圧部 材 24はネジ部 22aの最内部までねじ込まれて駆動軸 22に固定されている。受圧部 材 24は、大径のディスク部 24aと小径のボス部 24bとを同心に有しており、ボス部 24 bには、一対の摩擦部材 29、 29に挟まれて逆転防止輪 27が外嵌されている。逆転 防止輪 27とその両側に配設された摩擦部材 29、 29とは、駆動部材 30により受圧部 材 24のディスク部 24aに押圧可能に構成されている。逆転防止輪 27は、その外周に 円周方向の一方へ傾斜する係止歯 27aを備えており、その係止歯 27aが側板に枢 支されたラチェット爪 28と係合することにより、逆転防止輪 27は逆転が防止され、駆 動軸に対して一方向、すなわち卷上方向にのみ回転可能としている。また、図 15に おいて、駆動部材 30のフランジ部 30aの軸方向先端面であって、大径のボス部 30b により外側の円盤面部には同一形状の係止歯 30cが形成されている。駆動部材 30 の大径のボス部 30bには、回転駆動部材 32が外嵌されており、回転駆動部材 32の 軸方向基端面には、駆動部材 30の係止歯 30cと係合可能な係止歯 32aが軸方向基 端側に突き出して形成されている。回転駆動部材 32の各係止歯 32aは、駆動部材 3 0の係止歯 30c間に形成された凹溝と略適合した形状に形成されている。回転駆動 部材 32の外周部には、ハンドホイール 34が外嵌されている。回転駆動部材 32の駆 動部材 30に対する位置決めは、駆動部材 30の先端側の小径のボス部 30dのねじ部 に、円板状の回転制限部材 35及び付勢手段である皿パネ 33を介して、ナット 36を ねじ込むことにより行われる。回転制限部材 35の内周部には、略短形状の係合凸部 35aが径方向内側に複数個突出形成されている。回転制限部材 35は、駆動部材 30 に対し周方向への相対移動が規制される力 軸方向移動は可能とされている。皿バ ネ 33は、回転制限部材 35を介して、回転駆動部材 32を軸方向基端方向(駆動部材 30の側)に押圧するよう付勢力を作用させる。 FIG. 14 is a front view showing a conventional hoisting machine, and FIG. 15 is an exploded perspective view showing a main part of the overload preventing device of the hoisting machine. In FIG. 14, a drive shaft 22 is rotatably passed through a load sheave 21. A screw portion 22a is formed on the drive shaft 22, and a pressure receiving member 24 and a drive member 30 are screwed into the screw portion 22a from the side closer to the port sheave 21, and the pressure receiving member 24 is a screw portion 22a. And is fixed to the drive shaft 22. The pressure receiving member 24 has a large-diameter disk portion 24a and a small-diameter boss portion 24b concentrically, and the boss portion 24b is sandwiched between a pair of friction members 29 and 29 and has a reverse rotation prevention ring 27. It is fitted. The reverse rotation prevention wheel 27 and the friction members 29 and 29 arranged on both sides thereof are configured to be pressed against the disk portion 24a of the pressure receiving member 24 by the drive member 30. The anti-reverse wheel 27 is provided with a locking tooth 27a inclined on one side in the circumferential direction on its outer periphery, and the locking tooth 27a engages with a ratchet pawl 28 pivotally supported on the side plate to prevent reverse rotation. The wheel 27 is prevented from reverse rotation, and can rotate only in one direction with respect to the drive shaft, that is, the upside direction. Further, in FIG. 15, the front end surface in the axial direction of the flange portion 30a of the drive member 30 is a large-diameter boss portion 30b. Thus, the same shape of locking teeth 30c is formed on the outer disk surface. A rotary drive member 32 is externally fitted to the large-diameter boss portion 30b of the drive member 30, and the axially proximal end surface of the rotary drive member 32 is engaged with the locking teeth 30c of the drive member 30. The pawl 32a protrudes toward the axial base end. Each locking tooth 32a of the rotary drive member 32 is formed in a shape that is substantially matched with a concave groove formed between the locking teeth 30c of the drive member 30. A handwheel 34 is fitted on the outer periphery of the rotation drive member 32. The rotation drive member 32 is positioned with respect to the drive member 30 through a disk-shaped rotation restricting member 35 and a pan panel 33 serving as a biasing means on the threaded portion of the small-diameter boss 30d on the distal end side of the drive member 30. This is done by screwing the nut 36. A plurality of substantially short engaging protrusions 35a are formed on the inner peripheral portion of the rotation restricting member 35 so as to protrude radially inward. The rotation restricting member 35 is capable of moving in the force axis direction in which relative movement in the circumferential direction is restricted with respect to the drive member 30. The dish pan 33 applies an urging force to press the rotation drive member 32 in the axial base end direction (the drive member 30 side) via the rotation limiting member 35.
次に、この従来の卷上機の使用について説明する。まず、ナット 36がねじ込まれ、 付勢手段である皿パネ 33が回転制限部材 35を軸方向基端側に押圧する。回転制 限部材 35は回転駆動部材 32に接触しているから、回転駆動部材 32を駆動部材 30 の側に付勢する。このとき、駆動部材 30の係止歯 30cと、回転駆動部材 32の係止歯 32aとが互いに係合している。ロードシーブ 1に卷掛けられたロードチェーンに、制限 荷重以下の負荷が吊り下げられている場合には、ハンドホイール 34を操作して回転 駆動部材 32を回転させると、回転は係止歯 32a、 30cを介して、駆動部材 30に伝達 され、駆動部材 30で受圧部材 23を押圧して回転させ、荷を巻き上げること力 Sできる。 これに対し、過負荷の荷が吊り上げられている場合に、ハンドホイール 34で回転駆 動部材 32を回転させると、回転駆動部材 32はハンドホイール 34と一緒に、皿バネ 3 3の付勢力に杭して軸方向先端側に押し戻されつつ、係止歯 32aの卷上時押圧面 が駆動部材 30の係止歯 30cの卷上時押圧面に沿って押し上げられ、回転駆動部材 32の係止歯 32aは、駆動部材 30の係止歯 30cを乗り越え、皿バネ 33の付勢力によ り、駆動部材 30の係止歯 30cの間の次の溝に収まって係合される。このように、過負 荷状態でハンドホイール 34を卷上方向に回転させると、駆動部材 30は回転しないが 、回転駆動部材 32のみが回転して、駆動部材 30を正転させることができず、過負荷 の吊上げ (巻き上げ)が防止される。 Next, the use of this conventional hoisting machine will be described. First, the nut 36 is screwed in, and the pan panel 33 serving as the urging means presses the rotation restricting member 35 toward the axial base end side. Since the rotation restricting member 35 is in contact with the rotation drive member 32, the rotation drive member 32 is urged toward the drive member 30. At this time, the locking teeth 30c of the drive member 30 and the locking teeth 32a of the rotary drive member 32 are engaged with each other. When a load less than the limit load is suspended on the load chain hung on the load sheave 1, when the rotary drive member 32 is rotated by operating the handwheel 34, the rotation is stopped by the locking teeth 32a, The force S is transmitted to the driving member 30 through 30c, and the pressure receiving member 23 is pressed and rotated by the driving member 30 to roll up the load. On the other hand, if the rotary drive member 32 is rotated by the handwheel 34 when an overloaded load is lifted, the rotary drive member 32 is applied to the urging force of the disc spring 33 together with the handwheel 34. While being piled up and pushed back toward the front end in the axial direction, the pressing surface of the locking teeth 32a is pushed up along the pressing surface of the locking teeth 30c of the drive member 30 and the rotation driving member 32 is locked. The teeth 32a get over the locking teeth 30c of the drive member 30 and are engaged in the next groove between the locking teeth 30c of the drive member 30 by the biasing force of the disc spring 33. As described above, when the handwheel 34 is rotated upward in the overloaded state, the drive member 30 does not rotate. Only the rotary drive member 32 rotates, and the drive member 30 cannot be rotated in the forward direction, and overload lifting (winding) is prevented.
特許文献 1 :特許第 309629号明細書 (3〜5頁、図 1、 2参照)  Patent Document 1: Patent No. 309629 (refer to pages 3-5, Fig. 1 and 2)
発明の開示  Disclosure of the invention
[0005] しかしながら、従来の卷上機における過負荷防止装置では、付勢手段と付勢手段 を押圧するナットを駆動部材上に積層している構造としているので、卷上機を小形化 するためには、付勢手段として皿パネ等の小ストロークの付勢手段を用いざるを得ず 、そのため、付勢手段の軸方向のストロークが小さくなり、過負荷防止用係止歯の高 さも皿パネのストロークに合わせて小さいものとなるため、係止歯の高さに精度を持た せるためには、機械加工等が必要で、コスト高となる。さらに、過負荷防止用係止歯 の高さが低いため、製造公差を同一とした場合、係止歯の高さが高い歯に比べて、 歯の高さに対する製造公差の誤差の割合が大きくなるため、スリップ荷重のばらつき が大きくなり、製品の品質安定性を損なうこととなる。また、卷上機の出荷時にスリップ 荷重をある値の範囲内にすることが必要となる力 ストロークが小さいため、関連部品 の累積寸法誤差によるパネ圧の誤差の影響を受けやすぐ出荷時には全品のパネ 圧を調整する必要が有り、また、調整範囲も微小なため、調整が困難で熟練を要して いた。また、図 14に示すように、ハンドホイールは駆動部材のフランジ部に僅か接触 してガイドされるだけであるため、ハンドチェーンの手引き操作時に傾き易ぐかつ皿 パネの影響を受けるため、軸方向の摺動面に摩擦が生ずるという課題を有していた。  [0005] However, the conventional overload prevention device for a hoisting machine has a structure in which the urging means and the nut that presses the urging means are stacked on the drive member, so that the hoisting machine can be downsized. Therefore, it is necessary to use a small stroke urging means such as a dish panel as the urging means. Therefore, the axial stroke of the urging means is reduced, and the height of the overload prevention locking teeth is also reduced. Therefore, in order to give a high accuracy to the height of the locking teeth, machining or the like is required, resulting in high costs. In addition, since the height of the locking tooth for preventing overload is low, if the manufacturing tolerance is the same, the ratio of the manufacturing tolerance error to the tooth height is larger than that of the tooth with a high locking tooth height. As a result, the variation in slip load increases and the product quality stability is impaired. In addition, since the force stroke required to keep the slip load within a certain range at the time of shipment of the hoisting machine is small, it is affected by the panel pressure error due to the accumulated dimensional error of related parts, and all products are It was necessary to adjust the panel pressure, and the adjustment range was very small, making adjustment difficult and requiring skill. In addition, as shown in Fig. 14, the handwheel is guided only slightly in contact with the flange of the drive member. There was a problem that friction was generated on the sliding surface.
[0006] また、過負荷防止用係止歯の高さを一定の高さのものとする場合には、高ストローク のばねが必要であり、その場合は、皿バネを何層にも重層することを要し、その結果 卷上機が大型化するとレ、う課題を有してレ、た。  [0006] In addition, when the height of the overload prevention locking teeth is constant, a high stroke spring is required, and in that case, the disc springs are stacked in layers. As a result, there was a problem with the size of the aircraft.
[0007] また、卷上装置を大型化することなぐかつストロークの大きな弾性部材を用いること により、上記課題を解決する卷上機における過負荷防止装置として、本出願人にお レ、てロードシーブを駆動する駆動軸と、駆動軸に外装された受圧部材と、ハンドホイ 一ルカ の駆動力を受圧部材を介して駆動軸に伝達する駆動部材と、ハンドホイ一 ノレからの駆動力を駆動部材に伝達し、ハンドホイールに所定トルク値以上のトルクが 加わった場合に、駆動部材との係合を解除する手段を備えた回転駆動部材と、回転 駆動部材の背面とハンドホイールの内側端面間で、駆動部材の軸方向に沿って装 着され、回転駆動部材を付勢する複数の弾性部材を備えた過負荷防止装置が開発 されている。 [0007] Further, by using an elastic member having a large stroke without increasing the size of the hoisting device, the present applicant has applied the load sheave as an overload prevention device in the hoisting machine that solves the above-mentioned problems. A drive shaft for driving the drive shaft, a pressure receiving member externally mounted on the drive shaft, a drive member for transmitting the driving force of the hand wheel rucker to the drive shaft through the pressure receiving member, and a driving force from the hand wheel nozzle for transmitting to the drive member A rotating drive member having means for releasing the engagement with the drive member when a torque greater than a predetermined torque value is applied to the handwheel; An overload prevention device has been developed that includes a plurality of elastic members that are mounted along the axial direction of the drive member between the back surface of the drive member and the inner end surface of the handwheel and bias the rotary drive member.
[0008] しかし、上記過負荷防止装置では、回転駆動部材は、駆動部材の軸方向に沿って 配設された複数のパネにより付勢されるため、回転駆動部材が受けるパネ圧が不均 一となり、そのため、過負荷時に、回転駆動部材は傾斜し易くなり、傾斜により、回転 駆動部材がハンドホイールの内周のガイド部に干渉して軸方向の移動が円滑にでき なくなるという課題を有していた。また、ハンドホイールの内側端面はパネに直接押圧 されるため、ハンドホイールと、ハンドホイールと駆動部材を係止する座金の摺動面 の間にパネによる摩擦抵抗が発生し、座金の精度は必ずしも一定でないため、過負 荷時における回転駆動部材と駆動部材とのスリップ荷重が一定にならないという課題 を有していた。  [0008] However, in the overload prevention device, the rotation drive member is biased by a plurality of panels arranged along the axial direction of the drive member, so that the panel pressure received by the rotation drive member is uneven. For this reason, the rotation drive member is likely to be inclined during an overload, and the inclination causes the rotation drive member to interfere with the guide portion on the inner periphery of the handwheel, thus making it difficult to smoothly move in the axial direction. It was. In addition, since the inner end surface of the handwheel is directly pressed against the panel, friction resistance is generated by the panel between the handwheel and the sliding surface of the washer that locks the handwheel and the drive member. Since it was not constant, there was a problem that the slip load between the rotary drive member and the drive member during overload was not constant.
[0009] 本発明は上記課題を解決するもので、操作手段の駆動に連動して駆動する駆動部 材と、駆動部材の駆動をブレーキ手段を介して、操作手段を駆動する駆動軸に伝達 する駆動装置を備えた卷上機における過負荷防止装置において、操作手段の内周 面と駆動部材の外周間に、操作手段の幅と略同長の長さの空間を設け、前記空間に 、駆動部材と、操作手段と係合し、操作手段の駆動を駆動部材に伝達し、操作手段 のトノレクにより、駆動部材に伝達するトルクを制限する手段を有する回転駆動部材と 、駆動部材の外周に卷装され、回転駆動部材を駆動部材側に押圧するパネ部材と、 駆動部材に係着され、前記パネ部材の端部を押止するパネ押えを内設し、前記パネ 部材を、操作手段の内周面と駆動部材の外周面と、回転駆動部材の背面とパネ押え 間とで形成され、軸方向に延びる筒状の空間に配設したことを特徴とする。  [0009] The present invention solves the above-described problem, and transmits a drive member that is driven in conjunction with the drive of the operation means, and the drive of the drive member to a drive shaft that drives the operation means via the brake means. In the overload prevention device for a hoisting machine equipped with a drive device, a space having a length substantially the same as the width of the operation means is provided between the inner peripheral surface of the operation means and the outer periphery of the drive member, and the drive is provided in the space. A rotating drive member that has a member that engages with the operation means, transmits the drive of the operation means to the drive member, and limits torque transmitted to the drive member by the torque of the operation means; A panel member that presses the rotary drive member toward the drive member, and a panel presser that is engaged with the drive member and holds the end of the panel member inside. The peripheral surface, the outer peripheral surface of the drive member, and the back surface of the rotary drive member It is formed in the inter-panel pressing, characterized by being arranged in a cylindrical space extending in the axial direction.
[0010] また、操作手段は、内周端面に環状ガイド部を有するハンドホイールであり、駆動 部材の外周面とパネ押えの外周面を前記環状ガイド部に摺接するようにしたことを特 徴とする。  [0010] Further, the operation means is a handwheel having an annular guide portion on an inner peripheral end surface, and the outer peripheral surface of the driving member and the outer peripheral surface of the panel presser are in sliding contact with the annular guide portion. To do.
[0011] また、駆動部材は、パネ押えの回転駆動部材側への移動を規制する段部を有し、 パネ押えを駆動部材に螺合し、前記段部に当接固定させることを特徴とする。  [0011] Further, the drive member has a step portion that restricts the movement of the panel presser toward the rotation drive member, and the panel presser is screwed into the drive member, and is fixed in contact with the step portion. To do.
[0012] また、パネ部材は、駆動部材の外周に卷装され、回転駆動部材とパネ押え間に張 設されるコイルパネであることを特徴とする。 [0012] The panel member is mounted on the outer periphery of the drive member, and is stretched between the rotation drive member and the panel presser. The coil panel is provided.
[0013] また、コイルバネは、大径コイルパネと、大径コイルパネの内周に重層される小径コ ィルバネであることを特徴とする。  [0013] The coil spring is a large-diameter coil panel and a small-diameter coil spring layered on the inner periphery of the large-diameter coil panel.
[0014] また、パネ押えは、回転駆動部材の空転方向と同方向に回転時に、駆動部材に設 けた係止段部と当接し、駆動部材に締着するように螺着されることを特徴とする。また 、バネ押えは、操作手段の内径より大径の外径を有し、ハンドホイールの内周端面に 設けた環状ガイド部に摺接させ、ハンドホイールをガイドすることを特徴とする。  [0014] Further, the panel presser is screwed so as to come into contact with a locking step provided on the drive member and fasten to the drive member when rotating in the same direction as the idling direction of the rotary drive member. And Further, the spring retainer has an outer diameter larger than the inner diameter of the operation means, and is slidably brought into contact with an annular guide portion provided on the inner peripheral end surface of the hand wheel to guide the hand wheel.
[0015] また、操作手段は、駆動部材及びパネ押え間に所定の隙間を有して設けられること を特徴とする。  [0015] Further, the operation means is provided with a predetermined gap between the drive member and the panel presser.
図面の簡単な説明  Brief Description of Drawings
[0016] [図 1]本発明の卷上機の正面図である。  [0016] FIG. 1 is a front view of a hoist according to the present invention.
[図 2]図 1の過負荷防止装置の要部拡大図である。  2 is an enlarged view of a main part of the overload prevention device of FIG.
[図 3]図 2の分解斜視図である。  FIG. 3 is an exploded perspective view of FIG. 2.
[図 4]図 2のハンドホイ一ノレの正面図である。  FIG. 4 is a front view of the hand hoist of FIG.
[図 5]図 4の A— A断面図である。  FIG. 5 is a cross-sectional view taken along line AA in FIG.
[図 6]図 2の駆動部材の正面図である。  FIG. 6 is a front view of the drive member of FIG.
[図 7]図 6の平面図である。  FIG. 7 is a plan view of FIG. 6.
[図 8]図 7の A— A断面図である。  FIG. 8 is a cross-sectional view taken along line AA in FIG.
[図 9]図 2の回転駆動部材の正面図である。  FIG. 9 is a front view of the rotary drive member of FIG. 2.
[図 10]図 9の底面図である。  FIG. 10 is a bottom view of FIG. 9.
[図 11]図 9の斜視図である。  FIG. 11 is a perspective view of FIG. 9.
[図 12]図 2のバネ押えの正面図である。  FIG. 12 is a front view of the spring retainer of FIG.
[図 13]図 12の A— A断面図である。  FIG. 13 is a cross-sectional view taken along line AA in FIG.
[図 14]従来の装上機の正面図である。  FIG. 14 is a front view of a conventional dressing machine.
[図 15]図 14の過負荷防止装置の主要部を示す分解斜視図である。  15 is an exploded perspective view showing a main part of the overload prevention device of FIG.
符号の説明  Explanation of symbols
[0017] 1 ロードシーブ [0017] 1 load sheave
2 駆動軸 2a 嵌合部2 Drive shaft 2a Mating part
2b 空転部2b idling part
2c 係合部 2c Engagement part
2d ネジ部  2d thread
3a 減速ギヤ 3a Reduction gear
3b ロードギヤ3b road gear
4 受圧部材4 Pressure receiving member
4a ボス部 4a Boss
5 逆転防止輪 5 Anti-reverse wheel
6 爪 6 nails
7 ノ^ネ  7
8 ブレーキ板 8 Brake plate
9 ノヽンドホイ一ノレ9 Nord Hoy
9a 嵌合凹部9a Mating recess
9b 挿入溝 9b Insertion groove
9c 内側内周 9c Inner inner circumference
9d 内周端面9d Inner edge
9e 環状ガイド部9e Annular guide
9f 空間 9f space
10 駆動部材 10 Drive member
10a メネジ 10a Female thread
10b フランジ 10b flange
10c ボス部 10c Boss
10d 係合歯 lOe ネジ溝 l Of 係止段部 10d Engaging tooth lOe Thread groove l Of Locking step
10g ガイド部 l Oh 開口部 i 端部10g Guide part l Oh Opening i End
j 係止歯部k 傾斜歯部 j Locking tooth k Inclined tooth
回転駆動部材a 係合歯 Rotation drive member a Engaging tooth
b 嵌合凸部c 係止歯部d 傾斜歯部e リンク部 b Mating convex part c Locking tooth part d Inclined tooth part e Link part
バネ Spring
a 内バネa Inner spring
b 外バネb Outer spring
c 嵌合凸部 c Mating protrusion
バネ押えa ネジ部 Spring retainer a Screw part
b 当接部b Abutment
c ガイド部 c Guide section
回転規制部材 上フック ロードチェーン ハンドチェーン フレーム本体a 駆動側フレームb 減速側フレームc 連結フレームd、 18e 軸受プレートa 開口部 Rotation restricting member Upper hook Load chain Hand chain Frame body a Drive side frame b Deceleration side frame c Connection frame d, 18e Bearing plate a Opening
b 環状溝 19c スペース b Annular groove 19c space
20a 駆動側カバー  20a Drive side cover
20b 減速機側カバー  20b Reduction gear side cover
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0018] 以下、本発明の実施の形態について説明する。 Hereinafter, embodiments of the present invention will be described.
[0019] 本発明の実施の形態の卷上機について図 1〜: 13を参照しながら説明する。図 1は 、本発明の実施の形態の卷上機の正面図、図 2は、図 1の過負荷防止装置の要部拡 大図、図 3は、図 2の分解斜視図、図 4は図 2のハンドホイールの正面図、図 5は図 4 の A— A断面図、図 6は図 2の,駆動部材の正面図、図 7は図 6の平面図、図 8は図 7 の A— A断面図、図 9は図 2の回転駆動部材の正面図、図 10は図 9の底面図、図 11 は図 9の斜視図、図 12は図 2のバネ押えの正面図、図 13は図 12の A— A断面図で ある。  [0019] A hoisting machine according to an embodiment of the present invention will be described with reference to Figs. 1 is a front view of the hoist according to the embodiment of the present invention, FIG. 2 is an enlarged view of a main part of the overload prevention device of FIG. 1, FIG. 3 is an exploded perspective view of FIG. 2, and FIG. 2 is a front view of the handwheel of FIG. 2, FIG. 5 is a cross-sectional view taken along the line AA of FIG. 4, FIG. 6 is a front view of the drive member of FIG. — A sectional view, Fig. 9 is a front view of the rotary drive member of Fig. 2, Fig. 10 is a bottom view of Fig. 9, Fig. 11 is a perspective view of Fig. 9, and Fig. 12 is a front view of the spring retainer of Fig. 2, Fig. 13 Fig. 12 is a cross-sectional view taken along line AA in Fig. 12.
[0020] 図において、 1はロードシーブ、 2はロードシーブ 1に回転可能に軸支された駆動軸 、 2aは受圧部材 4との嵌合部、 3aは駆動軸 2の先端に設けたギヤと嚙合し、回転を 減速する減速ギヤ、 3bは減速ギヤ 3aと一体の小ギヤ(図示せず)と嚙合し、ロードシ ーブ 1を回転するロードギヤ、 4は受圧部材、 4aは受圧部材のボス部、 5は逆転防止 輪、 6は逆転防止輪 5を一方向に回動するように制御するッメ、 7はッメ 6を付勢する バネ、 8はブレーキ板、 9は操作手段であるハンドホイールで、ハンドホイール 9の内 側内周 9cに、回転駆動部材 11の横長状突起 l ibが嵌合する嵌合凹部 9aと、駆動 部材 10及びパネ押え 13の端面が当接する内側端面 9dと、駆動部材 10のガイド部 1 Ogとパネ押え 13のガイド部 13cと摺接する環状ガイド部 9eを備える。 10は駆動部材 、 10aは駆動部材のメネジ部で受圧部材 4と螺合する。 10bは駆動部材 10のフランジ 部で、ハンドホイール 9の内径より大径の外径を有し、その端面は円盤形状である。 1 0cは回転駆動部材 11及びバネ 12が嵌揷されるボス部、 10dはフランジ部 10bのハ ンドホイール側円盤面に形成された係合歯で、その形状は、後記する回転駆動部材 11の過負荷防止用係合歯 11aが密接する形状となっている。係合歯 10dは、略直角 方向の急斜面を有する係止歯部 10jと緩斜面を有する傾斜歯部 10kを有する。 10e は後記するパネ押え 13が螺合するネジ溝、 10fはパネ押えが当接する位置決め用 係止段部、 10gはフランジ 10bの外周面で、ハンドホイール 9のガイド部 9eに摺接し、 ハンドホイールを支承するガイド部、 10hは扇形状の開口部、 10iは端部である。前 記開口部 10hには、駆動軸 2の端部に固着された回転規制部材 14が挿入され、駆 動部材 10がメネジ 10aによるネジの緩み方向へ回転されたときに、駆動部材 10の開 口部 10hの端部 10iが回転規制部材 14に当接して回転規制するようになっており、 駆動部材 10の緩み過ぎを防止する。 In the figure, 1 is a load sheave, 2 is a drive shaft rotatably supported by the load sheave 1, 2 a is a fitting portion with a pressure receiving member 4, and 3 a is a gear provided at the tip of the drive shaft 2. A reduction gear that meshes and decelerates rotation, 3b meshes with a small gear (not shown) integrated with the reduction gear 3a and rotates the load sheave 1, 4 is a pressure receiving member, 4a is a boss portion of the pressure receiving member , 5 is an anti-reverse wheel, 6 is an anti-reverse wheel that controls the rotation of the anti-reverse wheel 5 in one direction, 7 is a spring that urges the nail 6, 8 is a brake plate, and 9 is an operating means hand. A fitting recess 9a in which the horizontally long projection l ib of the rotary drive member 11 is fitted to the inner inner periphery 9c of the handwheel 9 and an inner end surface 9d in which the end surfaces of the drive member 10 and the panel presser 13 are in contact with each other. The guide member 1 Og of the drive member 10 and the annular guide portion 9e slidably in contact with the guide portion 13c of the panel presser 13 are provided. Reference numeral 10 denotes a drive member, and 10a is a female screw portion of the drive member and is screwed to the pressure receiving member 4. Reference numeral 10b denotes a flange portion of the drive member 10, which has an outer diameter larger than the inner diameter of the handwheel 9, and its end surface is a disk shape. 10c is a boss portion into which the rotational drive member 11 and the spring 12 are fitted, 10d is an engagement tooth formed on the handwheel side disk surface of the flange portion 10b, and the shape thereof is that of the rotational drive member 11 described later. The overload prevention engaging teeth 11a are in close contact with each other. The engaging tooth 10d has a locking tooth portion 10j having a steep slope in a substantially right angle direction and an inclined tooth portion 10k having a gentle slope. 10e is the thread groove to which the panel presser 13 described later is screwed, and 10f is for positioning where the panel presser contacts An engaging step portion, 10g, is an outer peripheral surface of the flange 10b, is in sliding contact with the guide portion 9e of the handwheel 9, supports the handwheel, 10h is a fan-shaped opening, and 10i is an end portion. The rotation restricting member 14 fixed to the end of the drive shaft 2 is inserted into the opening 10h, and when the drive member 10 is rotated in the screw loosening direction by the female screw 10a, the drive member 10 is opened. The end portion 10i of the mouth portion 10h abuts against the rotation restricting member 14 to restrict the rotation, thereby preventing the drive member 10 from being loosened too much.
[0021] なお、通常時は駆動部材 10の開口部 10hの端部 10iと回転規制部材 14は回転方 向に所定の間隔が設けられている。 11は駆動部材 10のボス部 10cに嵌合する回転 駆動部材で、環状リンク部 l ieと、環状リンク部 l ieの外周には、ハンドホイール 9の 嵌合凹部 9aと幅方向に嵌合するように、駆動部材 10の軸方向に延びる横長状突起 である嵌合凸部 l ibを備え、該横長状突起 l ibの駆動部材 10側には、回転駆動部 材 11の駆動部材 10側端面から、駆動部材 10側に突出し、駆動部材 10の係合歯 10 dと嚙合する過負荷防止用係止歯 1 laが設けられてレ、る。過負荷防止用係止歯 1 la は、略直角方向の急斜面を有する係止歯部 1 1cと緩斜面を有する傾斜歯部 l idを 有する。 [0021] In normal times, the end 10i of the opening 10h of the drive member 10 and the rotation restricting member 14 are provided with a predetermined interval in the rotation direction. Reference numeral 11 denotes a rotational drive member that fits into the boss portion 10c of the drive member 10, and is fitted in the width direction with the annular link portion l ie and the outer periphery of the annular link portion l ie with the fitting recess 9a of the handwheel 9. As described above, a fitting protrusion l ib that is a horizontally long protrusion extending in the axial direction of the driving member 10 is provided, and the driving member 10 side end surface of the rotation driving member 11 is provided on the driving member 10 side of the horizontally long protrusion l ib. Therefore, an overload-preventing locking tooth 1 la that protrudes toward the driving member 10 and meshes with the engaging tooth 10 d of the driving member 10 is provided. The overload-preventing locking tooth 1 la has a locking tooth part 11 c having a steep slope in a substantially perpendicular direction and an inclined tooth part id having a gentle slope.
[0022] 本実施例では、回転駆動部材 11は後記するパネ 12の付勢力に抗して、ノ、ンドホイ ール 9の嵌合凹部 9aに沿って駆動部材 10の軸方向に移動可能である。図 9に示す ように、前記突起 l ibの軸方向長さ hは、リンク部 l ieの厚さに対して、相対的に長く 形成されており、回転駆動部材 11をハンドホイール 9に対して移動伝達可能に係合 するための、十分な係合長を確保している。また、前記突起 l ibは、回転駆動部材 1 1の環状リンク部 l ieの外周に 4個設けられ、ハンドホイール 9には嵌合凹部 9aが 4個 設けられている。この個数は 4個に限定されるものではなレ、。また、突起 l ibの外周と ハンドホイール 9の嵌合凹部 9aとの間には摩擦を減少するための隙間が設けられて いる。 12は回転駆動部材 11を駆動部材 10側に付勢するパネで、パネ 12は、内パネ 12a,外バネ 12bのからなり、駆動部材 10のボス部 10cに卷装され、駆動部材 10と ハンドホイールの内側内周 9c間と回転駆動部材 11とパネ押え 13間の空間に配設さ れる。 13はバネ押えで、駆動部材 10のネジ溝 10eに螺合するネジ部 13aと、駆動部 材 10に螺着時に、駆動部材 10の係止段部 10fと当接する当接面 13bと、外周にハ ンドホイール 9の内径より大径の外径を有し、ハンドホイール 9の環状ガイド部 9eと摺 接するガイド部 13cを有する。 14は駆動軸 2の端部に固着され、駆動部材 10の開口 部に嵌合する回転規制部材である卷上機の駆動、制動部分は、ハンドホイール 9に 回転駆動部材 11を介して連結した駆動部材 10、受圧部材 4、逆転防止輪 5、ブレー キ板 8から構成さる、いわゆるメカニカルブレーキにて行われる。 In the present embodiment, the rotary drive member 11 is movable in the axial direction of the drive member 10 along the fitting recess 9a of the wheel 9 against the biasing force of the panel 12 described later. . As shown in FIG. 9, the axial length h of the protrusion l ib is formed to be relatively longer than the thickness of the link portion l ie, and the rotational drive member 11 is Sufficient engagement length is secured to engage in such a way that movement can be transmitted. Further, four protrusions l ib are provided on the outer periphery of the annular link portion l ie of the rotation drive member 11, and the handwheel 9 is provided with four fitting recesses 9 a. This number is not limited to four. Further, a gap for reducing friction is provided between the outer periphery of the protrusion l ib and the fitting recess 9a of the handwheel 9. Reference numeral 12 denotes a panel that urges the rotary drive member 11 toward the drive member 10, and the panel 12 includes an inner panel 12 a and an outer spring 12 b, and is mounted on the boss portion 10 c of the drive member 10. It is arranged in the space between the inner inner circumference 9c of the wheel and between the rotation drive member 11 and the panel presser 13. 13 is a spring retainer, a screw portion 13a that is screwed into the screw groove 10e of the drive member 10, a contact surface 13b that comes into contact with the locking step portion 10f of the drive member 10 when screwed to the drive member 10, and an outer periphery To The guide wheel 13 has an outer diameter larger than the inner diameter of the handwheel 9, and has a guide portion 13 c that is in sliding contact with the annular guide portion 9 e of the handwheel 9. 14 is fixed to the end of the drive shaft 2, and the driving and braking parts of the lifting machine, which is a rotation restricting member fitted into the opening of the drive member 10, are connected to the handwheel 9 via the rotation drive member 11. This is performed by a so-called mechanical brake composed of a drive member 10, a pressure receiving member 4, a reverse rotation prevention wheel 5, and a brake plate 8.
[0023] 前記の通り、ハンドホイール 9には、その内周面 9cと駆動部材 10の外周との間で、 ハンドホイール 1の内周 9cの幅と略同長の長さの空間 9fが設けられており、この空間 9fに、駆動部材 10とハンドホイール 9と係合し、ハンドホイール 9の駆動を駆動部材 1 0に伝達する回転駆動部材 11と、駆動部材 10のボス部 10cに卷装され、回転駆動 部材 11を駆動部材 10側に押圧するパネ部材 12と、駆動部材 10のネジ溝 1 Oeに螺 合され、前記パネ部材 12を押止するパネ押え 13が内設されている。  [0023] As described above, the handwheel 9 is provided with a space 9f having a length substantially the same as the width of the inner periphery 9c of the handwheel 1 between the inner peripheral surface 9c and the outer periphery of the drive member 10. In this space 9f, the drive member 10 and the hand wheel 9 are engaged with each other, and the rotary drive member 11 for transmitting the drive of the hand wheel 9 to the drive member 10 and the boss portion 10c of the drive member 10 are mounted. A panel member 12 that presses the rotary drive member 11 toward the drive member 10 and a panel presser 13 that is screwed into the screw groove 1 Oe of the drive member 10 and holds the panel member 12 are provided.
[0024] また、駆動部材 10には、パネ押え 13の回転駆動部材 11側への移動を規制する段 部 10fが設けられており、パネ押え 13は駆動部材 10のネジ溝 10eに螺合し、前記段 部 10fに当接して固定され、この状態でバネ押え 13の外周のガイド部 13cはハンドホ ィール 9の環状ガイド 9eに摺接して、ハンドホイール 9の回転をガイドするように構成 されており、また、駆動部材 10のガイド部 10gは、ハンドホイール 9の駆動部材 10側 の環状ガイド 9eに摺接して、ハンドホイール 9の回転をガイドするように構成されてい る。このように、ハンドホイール 9の環状ガイド 9eは、バネ押え 13のガイド部 13cと駆 動部材 10のガイド部 10gに摺接して、これらのガイド部で支承されている。  [0024] Further, the drive member 10 is provided with a step portion 10f for restricting the movement of the panel retainer 13 toward the rotation drive member 11 side, and the panel retainer 13 is screwed into the screw groove 10e of the drive member 10. In this state, the guide portion 13c on the outer periphery of the spring presser 13 is slidably contacted with the annular guide 9e of the handwheel 9 to guide the rotation of the handwheel 9. In addition, the guide portion 10g of the drive member 10 is configured to be in sliding contact with the annular guide 9e on the drive member 10 side of the handwheel 9 to guide the rotation of the handwheel 9. As described above, the annular guide 9e of the handwheel 9 is slidably contacted with the guide portion 13c of the spring retainer 13 and the guide portion 10g of the driving member 10, and is supported by these guide portions.
[0025] また、駆動部材 10に卷装されるバネ部材 12は、小径コイルバネ 12aと大径コイルバ ネ 12bからなり、駆動部材 10とハンドホイール 9の内周 9c間で、回転駆動部材 11と パネ押え 13間の軸方向にストレートに延びる筒状の空間内に張設されている。駆動 部材 10の内側にはメネジ 10aが螺設されており、該メネジ 10aは受圧部材 4の外周 に設けたネジに螺合している。受圧部材 4の外周には、ブレーキ板 8が同軸上に回 転可能に設けられ、ブレーキ板 8は、受圧部材 4の一端に形成された受圧部と駆動 部材 10間に一対で、受圧部材 4に対しては回転可能に設けられている。また、ブレ ーキ板 8、 8間には、受圧部材 4の外周同軸上に逆転防止輪 5が設けられている。  [0025] The spring member 12 mounted on the drive member 10 includes a small-diameter coil spring 12a and a large-diameter coil spring 12b, and between the drive member 10 and the inner periphery 9c of the handwheel 9, the rotary drive member 11 and the panel. It is stretched in a cylindrical space extending straight in the axial direction between the pressers 13. A female screw 10 a is screwed inside the driving member 10, and the female screw 10 a is screwed to a screw provided on the outer periphery of the pressure receiving member 4. A brake plate 8 is provided on the outer periphery of the pressure receiving member 4 so as to be coaxially rotatable. The brake plate 8 is a pair between the pressure receiving portion formed at one end of the pressure receiving member 4 and the drive member 10. Is provided so as to be rotatable. Further, between the brake plates 8, 8, an anti-reverse wheel 5 is provided on the outer circumference of the pressure receiving member 4.
[0026] また、 18は卷上機のフレーム本体で、アルミニウム合金を用いたダイキャスト成形や ロストワックス铸造にて成形されてレ、る。 [0026] 18 is a frame body of the hoisting machine. Molded by lost wax fabrication.
[0027] フレーム本体 18は、図 1に示すように、駆動側フレーム 18aと減速側フレーム 18bと 、両者を連結結合する連結フレーム 18cを備え、フレーム 18a、 18bはそれぞれ駆動 側、減速側に張出しており、その外周端縁部に駆動側カバー 20aと減速機側カバー 20bが密接状態で取着されている。駆動側フレーム 18aの駆動側張出し部には、駆 動側に向う開口部 19aが形成されており、開口部 19a内に受圧部材 4、ブレーキ板 8 、逆転防止輪 5、爪 6、パネ 7が収容される。駆動側フレーム 18aの側端部には、ハン ドホイール 9が嵌合する環状溝 19bが設けられており、該環状溝 19bには、メカ二力 ルブレーキによるハンドホイール 9の軸方向移動をしても該環状溝 19bにハンドホイ 一ルが嵌合される充分な軸方向のスペース 19cが予め設けられている。  [0027] As shown in FIG. 1, the frame body 18 includes a drive side frame 18a and a reduction side frame 18b, and a connection frame 18c that connects and couples them. The frames 18a and 18b project to the drive side and the reduction side, respectively. The drive-side cover 20a and the speed reducer-side cover 20b are attached in close contact with the outer peripheral edge portion. An opening 19a directed to the drive side is formed in the drive side overhanging portion of the drive side frame 18a, and a pressure receiving member 4, a brake plate 8, a reverse rotation prevention wheel 5, a claw 6, and a panel 7 are formed in the opening 19a. Be contained. An annular groove 19b into which the handwheel 9 is fitted is provided at the side end of the drive side frame 18a, and the handwheel 9 is moved in the axial direction by a mechanical double brake in the annular groove 19b. However, a sufficient space 19c in the axial direction in which the handwheel is fitted to the annular groove 19b is provided in advance.
[0028] この構成によって、開口部 19aに収容される受圧部材 4、ブレーキ板 8、逆転防止輪 5、爪 6、パネ 7は、駆動側フレーム 18aの側端部に設けた環状溝 19bにハンドホイ一 ノレ 9が装着されていることにより、外部から密閉されるため、外部からの粉塵の侵入を 防止することができ、粉塵によるメカニカルブレーキや過負荷防止装置の性能低下を 防止することができる。  With this configuration, the pressure receiving member 4, the brake plate 8, the reverse rotation preventing wheel 5, the claw 6, and the panel 7 that are accommodated in the opening 19 a are arranged in the annular groove 19 b provided at the side end of the drive side frame 18 a. Since the No. 9 is installed, it is sealed from the outside, so that dust can be prevented from entering from the outside, and the performance of the mechanical brake and overload prevention device due to dust can be prevented.
[0029] また、 18d、 18eは、連結フレーム 18cの内側に固設され、ロードシーブ 1を回転可 能に軸承する軸受プレートで、ロードシーブ 1の軸受部の耐摩耗を向上させることが でき、ダイキャスト成形によるアルミ合金製とすることで、耐摩耗性を低下させないで 軽量化することができる。  [0029] 18d and 18e are bearing plates that are fixed inside the connecting frame 18c and rotatably support the load sheave 1, and can improve wear resistance of the bearing portion of the load sheave 1. By using an aluminum alloy made by die casting, the weight can be reduced without reducing the wear resistance.
[0030] 次に、本実施の形態による駆動力切替え動作について説明する。通常操作時にお いて、ハンドホイール 9の回転は、回転駆動部材 11、駆動部材 10、受圧部材 4を介 して、駆動軸 2に伝達され、駆動軸 2から減速ギヤ 3a、ロードギヤ 3bで減速されて、口 ードシーブ 1を減速駆動する。  Next, the driving force switching operation according to the present embodiment will be described. During normal operation, the rotation of the handwheel 9 is transmitted to the drive shaft 2 via the rotational drive member 11, the drive member 10, and the pressure receiving member 4, and is decelerated from the drive shaft 2 by the reduction gear 3a and the load gear 3b. Then, drive the sheave 1 at a reduced speed.
[0031] 次に、過負荷時に作動する過負荷防止装置の構成及び作用について説明する。  [0031] Next, the configuration and operation of the overload prevention device that operates during overload will be described.
ハンドホイール 9には、コイルバネ 12、回転駆動部材 11、駆動部材 10が内設されて おり、パネ 12は回転駆動部材 11を軸方向すなわち駆動部材 10側に付勢している。 また、回転駆動部材 11は、嵌合凸部 l ibがハンドホイール 9の嵌合凹部 9aと嵌合し 、ハンドホイール 9と一体的に回転可能で、かつ軸方向にスライド可能に連結してい る。駆動部材 10は、駆動部材 10の係合歯 10dが回転駆動部材 11の過負荷防止用 係合歯 11aと嚙合し、正常回転時には、回転駆動部材 11の回転に追従して回転で きるようになつている。すなわち、ハンドホイール 9を操作して、回転駆動部材 11を回 転させると、回転駆動部材 11の過負荷防止用係合歯 l la、駆動部材 10の係合歯 1 0dを介して、駆動部材 10を回転し、駆動部材 10は受圧部材 4を押圧して回転させ、 受圧部材 4が回転することで駆動軸 2を回転し、駆動軸 2から、減速ギヤ 3a、ロードギ ャ 3bを介して、ロードシーブ 1を回転し、荷の巻き上げを行う。 The handwheel 9 includes a coil spring 12, a rotation drive member 11, and a drive member 10. The panel 12 urges the rotation drive member 11 in the axial direction, that is, the drive member 10 side. Further, the rotation drive member 11 is connected to the fitting convex portion l ib with the fitting concave portion 9a of the hand wheel 9 so as to be rotatable integrally with the hand wheel 9 and slidable in the axial direction. The The drive member 10 is configured so that the engagement tooth 10d of the drive member 10 meshes with the overload prevention engagement tooth 11a of the rotation drive member 11, and can rotate following the rotation of the rotation drive member 11 during normal rotation. It is summer. That is, when the handwheel 9 is operated to rotate the rotation drive member 11, the drive member is connected via the overload preventing engagement tooth l la of the rotation drive member 11 and the engagement tooth 10d of the drive member 10. 10, the driving member 10 presses and rotates the pressure receiving member 4, and the pressure receiving member 4 rotates to rotate the driving shaft 2, and from the driving shaft 2 through the reduction gear 3 a and the load gear 3 b, Rotate load sheave 1 to wind up the load.
[0032] この荷の巻き上げ動作時に、過負荷状態で荷が吊上げられ、ハンドホイールに所 定値以上のトノレクが加わった状態で、ハンドホイール 9、回転駆動部材 11を回転させ ると、駆動部材 10の係合歯 10dと嚙合してレ、る回転駆動部材 11の傾斜歯部 11 dは、 パネ 12の付勢力に抗して、係合歯 10dの傾斜歯部 10k係合面をスライドして軸方向 に押し戻され、回転駆動部材 1 1の過負荷防止用係合歯 11aは、駆動部材 10の係合 歯 10dを乗り越え、バネ 12の付勢力により、駆動部材 10の次の係合歯 10dと嚙合し 、過負荷状態では、回転駆動部材 11の過負荷防止用係合歯 1 1aによる駆動部材 1 0の係合歯 10dの乗り越え動作が継続して行われるため、回転駆動部材 11から駆動 部材 10へのトノレクの伝達は制限され、駆動部材 10に駆動力が伝達されない。  [0032] During the load hoisting operation, when the load is lifted in an overload state and the handwheel 9 and the rotary drive member 11 are rotated while the torref of a predetermined value or more is applied to the handwheel, the drive member 10 The inclined tooth portion 11d of the rotary drive member 11 is engaged with the engaging tooth 10d of the engaging tooth 10d against the biasing force of the panel 12 and slides on the inclined tooth portion 10k of the engaging tooth 10d. The engagement tooth 11a for preventing overload of the rotary drive member 1 1 is pushed back in the axial direction, gets over the engagement tooth 10d of the drive member 10, and the next engagement tooth 10d of the drive member 10 by the biasing force of the spring 12 In the overload state, the overdrive prevention engagement teeth 11a of the rotation drive member 11 continuously move over the engagement teeth 10d of the drive member 10a. The transmission of the torque to the member 10 is limited, and the driving force is not transmitted to the driving member 10.
[0033] このように、過負荷状態では、ハンドホイール 9を卷上げ方向に回転させると、回転 駆動部材 11は回転するが、回転駆動部材 11の過負荷防止用係合歯 11aは、駆動 部材 10の係合歯 10dをスライドして乗り越え、空転するため、回転駆動部材 11の回 転は、駆動部材 10には伝達されず、過負荷時の巻き上げ動作が防止される。回転 駆動部材 11の空転時に、バネ押え 13は空転方向と同方向に、駆動部材 10のネジ 溝 10eに螺着されているため、空転動作によるパネ押え 13の緩みは発生しない。  As described above, in the overload state, when the handwheel 9 is rotated in the lifting direction, the rotation drive member 11 rotates, but the overload preventing engagement teeth 11a of the rotation drive member 11 Since the ten engaging teeth 10d are slid to get over and idle, the rotation of the rotary drive member 11 is not transmitted to the drive member 10, and the winding operation at the time of overload is prevented. When the rotary drive member 11 is idling, the spring presser 13 is screwed into the screw groove 10e of the drive member 10 in the same direction as the idling direction, so that the panel presser 13 is not loosened due to the idling operation.
[0034] 本発明では、ハンドホイール 9の内周面 9cと駆動部材 10の外周間に、ハンドホイ一 ノレ 9の幅と略同長の長さの空間を設け、この空間を利用して、バネ 12a、 12bを卷装 したので、コイルバネ 12にハンドホイール 9の厚み分の大きなストロークを与えること ができ、装置を大型化することなぐストロークの大きなコイルパネ 12を用いて回転駆 動部材 10の付勢を行うことができる。また、ストロークの大きさに応じて、回転駆動部 材 11の過負荷防止用係合歯 11aの高さも大きくすることができるため、過負荷防止 用係合歯 11aの高さに対する製造公差の誤差の割合いを小さくでき、スリップ荷重の ばらつきの発生を抑制することができ、卷上機の出荷時における調整も不要となる効 果を有する。 [0034] In the present invention, a space having a length substantially the same as the width of the hand hoist liner 9 is provided between the inner peripheral surface 9c of the handwheel 9 and the outer periphery of the drive member 10, and the spring is utilized using this space. Since 12a and 12b are installed, the coil spring 12 can be given a large stroke equivalent to the thickness of the handwheel 9, and the coil panel 12 with a large stroke without enlarging the device is used to urge the rotary drive member 10 It can be performed. In addition, the height of the overload prevention engagement tooth 11a of the rotary drive member 11 can be increased according to the stroke size, thus preventing overload. The ratio of the error in manufacturing tolerance to the height of the engaging teeth 11a can be reduced, the occurrence of slip load variation can be suppressed, and the adjustment at the time of shipping of the hoisting machine is unnecessary.
[0035] さらに、回転駆動部材 11は、駆動部材 10の外周に卷装されるコイルパネ 12により 、均一な付勢力で付勢されるので、過負荷時に傾斜を生ずることなく軸方向に移動 でき、ハンドホイール 9の内周面との干渉を生じないたため、ハンドホイール 9を円滑 に操作することができ、また、ハンドホイール 9の過負荷を安定した状態で検出するこ とができる。さらに、ハンドホイール 9はコイルバネ 12による付勢力の影響を受けない 構成となっているので、空転する際の摺動面の摩擦抵抗は小さく安定しており、さら に、ハンドチェーン 9を斜め引きする場合であっても、コイルパネ 12と回転駆動部材 1 1は斜め引きによる操作の影響を受けないので、斜め引き時においても、過負荷を安 定して検出することができる。さらにまた、ハンドホイール 9の環状ガイド部 9eは駆動 部材 10のフランジ 10bの外周面のガイド部 10gとバネ押え 13のガイド部 13cによりガ イドされるので、ハンドチェーンを傾けて操作しても、ハンドホイール 9は傾動しないの で、安定した操作が可能である。  [0035] Further, since the rotary drive member 11 is urged with a uniform urging force by the coil panel 12 mounted on the outer periphery of the drive member 10, it can move in the axial direction without causing an inclination when overloaded, Since there is no interference with the inner peripheral surface of the handwheel 9, the handwheel 9 can be operated smoothly, and the overload of the handwheel 9 can be detected in a stable state. Furthermore, since the hand wheel 9 is configured not to be affected by the urging force of the coil spring 12, the frictional resistance of the sliding surface during idling is small and stable, and the hand chain 9 is pulled diagonally. Even in this case, the coil panel 12 and the rotary drive member 11 are not affected by the operation by the diagonal pulling, so that the overload can be stably detected even during the diagonal pulling. Furthermore, since the annular guide portion 9e of the handwheel 9 is guided by the guide portion 10g on the outer peripheral surface of the flange 10b of the drive member 10 and the guide portion 13c of the spring retainer 13, even if the hand chain is tilted and operated, Since the handwheel 9 does not tilt, stable operation is possible.
[0036] さらに本発明のパネ押え装着装置は、ハンドホイール 9の嵌合凹部 9aに嵌挿される 嵌合凸部 l ibと、前記嵌合凸部 l ibの先端に設けられた過負荷防止用係合歯 11a を有する回転駆動部材 1 1と、過負荷防止用係合歯 11aと嚙合し、回転駆動部材 11 の駆動に連動し、パネ押え用係止段部 10fを有する駆動部材 10と、回転駆動部材 1 1を駆動部材 10側に付勢するパネ部材 12と、駆動部材 10の端部に設けたネジ溝 1 0eに螺合し、パネ部材 12端部を押動するパネ押え 13を備え、パネ押え 13を、回転 駆動部材 11の空転方向と同方向に回動した時に駆動部材 11のネジ溝 10eに締着 するように螺着され、パネ押え 13端面を駆動部材 10の係止段部に当接させるように したことを特徴とするものである。そのため、本発明によると、駆動部材 10、回転駆動 部材 11及びバネ部材 12をハンドホイール 9に装着及びセットする工程をバネ押え 13 を駆動部材 10に螺合する工程だけで行うことができるため、従来装置に比して、部 品点数及び組立て工数を大幅に削減できる。また、バネ押え 13を駆動部材 10の係 止段部 10fに当接することでパネセットが完了し調整が不要になる。また、パネ押え 1 3は、回転駆動部材 11の空転方向と同方向に駆動部材 10に締着されているので、 過負荷による回転駆動部材の空転時に、締め方向の力が作用するため、パネ押え 1 3の緩みによる作動荷重の変動を防止することができる。また、本発明は、ノ、ンドホイ ールを外側の軸方向への移動規制する機能とパネを押える機能と、パネを押える手 段 (ナット)を緩み防止する機能を駆動部材とパネ押えのみで全て兼用して解決する ことができ、従来の卷上機における過負荷防止装置図 14、図 15に備えられている回 転制限部材 35を設ける必要がなぐまた、これに関わる加工も不要となり、部品点数 を減少させる事ができ、コスト低減が計れる効果を有する。 Furthermore, the panel presser mounting device of the present invention is provided with a fitting projection l ib fitted into the fitting recess 9a of the handwheel 9 and an overload prevention provided at the tip of the fitting projection l ib. A rotary drive member 11 having an engagement tooth 11a, and a drive member 10 having a panel presser locking step portion 10f which is engaged with the overload prevention engagement tooth 11a and interlocked with the drive of the rotary drive member 11; A panel member 12 that urges the rotary drive member 1 1 toward the drive member 10 and a panel presser 13 that is screwed into a screw groove 10e provided at the end of the drive member 10 and pushes the end of the panel member 12 The panel presser 13 is screwed so as to be fastened to the screw groove 10e of the drive member 11 when rotated in the same direction as the idling direction of the rotary drive member 11, and the end surface of the panel presser 13 is locked to the drive member 10. It is characterized by being brought into contact with the stepped portion. Therefore, according to the present invention, the process of mounting and setting the drive member 10, the rotary drive member 11 and the spring member 12 to the handwheel 9 can be performed only by the process of screwing the spring retainer 13 to the drive member 10. Compared to conventional equipment, the number of parts and assembly man-hours can be greatly reduced. Further, by bringing the spring retainer 13 into contact with the engaging step portion 10f of the driving member 10, the panel setting is completed and adjustment is not necessary. Panel presser 1 3 is fastened to the drive member 10 in the same direction as the idling direction of the rotary drive member 11. Therefore, when the rotary drive member idles due to overload, a force in the tightening direction acts, so the panel presser 1 3 is loosened. It is possible to prevent fluctuations in the operating load due to. In addition, the present invention provides a function for restricting the movement of the wheel and the outside wheel in the axial direction, a function for pressing the panel, and a function for preventing loosening of the means (nut) for pressing the panel with only the drive member and the panel presser. It is possible to solve all of these problems, and it is not necessary to provide the rotation restricting member 35 provided in the overload prevention device in Figs. 14 and 15 in the conventional lifting machine. The number of parts can be reduced and the cost can be reduced.
産業上の利用可能性  Industrial applicability
[0037] 本発明の過負荷防止装置は、装置を大型化することなぐストロークの大きいパネ 部材 [0037] The overload prevention device of the present invention is a panel member having a large stroke without enlarging the device.
を用い、過負荷時に、回転駆動部材はバネ部材による付勢力の変動を受けずに動 作する過負荷防止装置を提供できるので J、型卷上機において特に好適である。  In the case of overloading, the rotation drive member can provide an overload prevention device that operates without being subjected to fluctuations in the urging force by the spring member.
[0038] 従来の過負荷防止装置では、付勢手段として皿ばねを用いていたため、軸方向の ストロークが小さぐそのため、係合歯の高さも小さいものであった力 本発明では、ハ ンドホイールの内周面と駆動部材の外周間に、ハンドホイールの幅と略同長の長さの 空間を設け、この空間を利用して、駆動部材の外周にコイルパネを卷装し、コイルバ ネにハンドホイールの厚み分の大きなストロークを与えるようにしたため、装置を大型 化することなぐストロークの大きな弾性部材を用いて回転駆動部材の付勢を行うこと ができ、また、ストロークの大きさに応じて、回転駆動部材の係合歯の高さも大きくす ることができるため、係合歯の高さに対する製造公差の誤差の割合いを小さくでき、 また、ストロークが大きいため、関連部品の累積寸法誤差によるパネ圧の誤差の割合 レ、を小さくすることができ、これらによりスリップ荷重のばらつきの発生を抑制すること ができ、卷上機の出荷時における調整も不要となり、調整コストが全く不要になり、コ スト低減となる効果を有する。  [0038] In the conventional overload prevention device, since the disc spring is used as the urging means, the stroke in the axial direction is small. Therefore, the force in which the height of the engagement teeth is also small. A space approximately the same length as the width of the handwheel is provided between the inner peripheral surface of the drive member and the outer periphery of the drive member. Using this space, a coil panel is mounted on the outer periphery of the drive member, and the hand is attached to the coil panel. Since a large stroke corresponding to the thickness of the wheel is given, it is possible to urge the rotary drive member using an elastic member with a large stroke without increasing the size of the device, and depending on the stroke size, Since the height of the engagement teeth of the rotary drive member can be increased, the ratio of manufacturing tolerance error to the height of the engagement teeth can be reduced, and since the stroke is large, the cumulative dimensions of the related parts can be reduced. The ratio of the panel pressure error due to the error can be reduced, which can suppress the occurrence of slip load variation and eliminate the need for adjustment at the time of shipment of the hoist, making adjustment costs completely unnecessary. This has the effect of reducing costs.
[0039] また、回転駆動部材は、駆動部材の外周に卷装されるコイルパネにより、均一な付 勢力で付勢されるので、過負荷時に傾斜を生ずることなく軸方向に移動でき、ハンド ホイールの内周面との干渉を生じないたため、ハンドホイールを円滑に操作すること ができ、また、ハンドホイールの過負荷を安定した状態で検出することができる。さら に、ハンドホイールはバネ部材による付勢力の影響を受けない構成となっているので 、空転する際の摺動面の摩擦抵抗は小さく安定しており、さらに、ハンドチェーンを斜 め弓 Iきする場合であつても、パネ部材と回転駆動部材は斜め弓 Iきによる操作の影響 を受けないので、斜め引き時においても、過負荷を安定して検出することができる。さ らにまた、ハンドホイールは駆動部材のフランジのガイド面とバネ押えのガイド面によ りガイドされるので、ハンドチェーンを傾けて操作しても、ハンドホイールは傾動しない ので、安定した操作が可能である。さらに、コイルバネとして 2重バネを用いることによ り、短い長さで大きな付勢力を得ることができるため、パネの軸方向の長さを短縮でき 、卷上機を小型化できる効果を有する。 [0039] Further, since the rotary drive member is urged with a uniform urging force by the coil panel mounted on the outer periphery of the drive member, the rotary drive member can move in the axial direction without causing an inclination when overloaded, and the hand wheel Smooth operation of the handwheel because there was no interference with the inner surface In addition, overloading of the handwheel can be detected in a stable state. In addition, since the handwheel is configured not to be affected by the urging force of the spring member, the frictional resistance of the sliding surface during idling is small and stable. Even in this case, the panel member and the rotary drive member are not affected by the operation by the slanting bow I, so that overload can be stably detected even during slanting. Furthermore, since the handwheel is guided by the guide surface of the flange of the drive member and the guide surface of the spring presser, even if the hand chain is tilted, the handwheel does not tilt, so stable operation is possible. Is possible. Further, by using a double spring as a coil spring, a large biasing force can be obtained with a short length, so that the axial length of the panel can be shortened and the hoisting machine can be downsized.
本発明によると、駆動部材、回転駆動部材及びパネ部材を操作手段に装着及びセ ットする工程を、パネ押えを駆動部材に螺合し、パネ押え係止段部に当接する工程 だけで行うことができるため、従来装置に比して、部品点数及び組立て工数を大幅に 削減できる。また、パネ押えは、回転駆動部材の空転方向と同方向に回動した時に 駆動部材に締着するように螺着されているので、過負荷による回転駆動部材の空転 時に、締め方向の力が作用するため、パネ押えの緩みによる作動荷重の変動を防止 すること力 Sできる。また、本発明は、ハンドホイールを外側の軸方向への移動規制す る機能と、パネを押える機能と、パネを押える手段 (ナット)を緩み防止する機能を駆 動部材とパネ押えのみで全て兼用して解決す  According to the present invention, the step of mounting and setting the drive member, the rotation drive member, and the panel member on the operation means is performed only by the step of screwing the panel presser into the drive member and contacting the panel presser locking step. As a result, the number of parts and assembly man-hours can be greatly reduced as compared with conventional devices. Further, the panel presser is screwed so as to be fastened to the drive member when it is rotated in the same direction as the idling direction of the rotary drive member. Because of this, it is possible to prevent fluctuations in the operating load due to loose panel pressers. In addition, the present invention provides a function for restricting the movement of the hand wheel in the outer axial direction, a function for pressing the panel, and a function for preventing loosening of the means for pressing the panel (nut) by using only the driving member and the panel presser. Solve by combining
ること力 Sでき、図 14、図 15に示すように、従来の卷上機における過負荷防止装置に 備えられている回転制限部材 35を設ける必要がなぐまた、これに関わる加工も不要 となり、部品点数を減少させる事ができ、コスト低減が計れる効果を有する。さらに、 操作手段はパネ押えのガイド部により回転がガイドされるため、ハンドチェーンの斜 め方向の引張力によっても傾きが生ぜず、ハンドチヱーンの操作及び作動荷重の安 定化を図ることができる効果を有する。 14 and 15, as shown in Figs. 14 and 15, it is not necessary to provide the rotation limiting member 35 provided in the overload prevention device in the conventional hoisting machine. The number of parts can be reduced, and the cost can be reduced. In addition, since the rotation of the operating means is guided by the guide part of the panel presser, there is no inclination caused by the pulling force of the hand chain in the tilting direction, and the operation of the hand chain and the stabilization of the operating load can be achieved. Have

Claims

請求の範囲 The scope of the claims
[1] 操作手段の駆動に連動して駆動する駆動部材と、駆動部材の駆動をブレーキ手段 を介して、卷上機を駆動する駆動軸に伝達する駆動装置を備えた卷上機における過 負荷防止装置において、操作手段の内周面と駆動部材の外周間に、駆動部材と、 操作手段と係合し、操作手段の駆動を駆動部材に伝達し、操作手段のトルクにより、 駆動部材に伝達するトルクを制限する手段を有する回転駆動部材と、回転駆動部材 の背面とパネ押え間とで形成され、軸方向に延びる筒状の空間で、駆動部材の外周 に卷装されて、回転駆動部材を駆動部材側に押圧するパネ部材と、駆動部材に係 着され、前記パネ部材の端部を押止するパネ押えを備えたことを特徴とする卷上機 における過負荷防止装置。  [1] Overload in a lifting machine provided with a drive member that drives in conjunction with the drive of the operating means, and a drive device that transmits the drive of the drive member to a drive shaft that drives the lifting machine via a brake means In the prevention device, the drive member is engaged between the inner peripheral surface of the operation means and the outer periphery of the drive member, and the drive of the operation means is transmitted to the drive member and transmitted to the drive member by the torque of the operation means. A rotary drive member having means for limiting the torque to be generated, a cylindrical space formed in the axial direction and formed between the back surface of the rotary drive member and the panel presser, and mounted on the outer periphery of the drive member. An overload prevention device for a hoisting machine, comprising: a panel member that presses the panel member toward the drive member; and a panel presser that is engaged with the drive member and holds the end of the panel member.
[2] 操作手段は、内周端面に環状ガイド部を有するハンドホイールであり、駆動部材の外 周面とパネ押えの外周面を前記環状ガイド部に摺接し、ハンドホイールを支承するこ とを特徴とする請求項 1記載の卷上機における過負荷防止装置。  [2] The operating means is a hand wheel having an annular guide portion on the inner peripheral end surface, and the outer peripheral surface of the drive member and the outer peripheral surface of the panel presser are slidably contacted with the annular guide portion to support the hand wheel. The overload prevention device for a hoisting machine according to claim 1,
[3] 駆動部材は、パネ押えの回転駆動部材側への移動を規制する段部を有し、パネ押 えを駆動部材に螺合し、前記段部に当接固定させることを特徴とする請求項 1または 2記載の卷上機における過負荷防止装置。  [3] The drive member has a step portion that restricts movement of the panel presser toward the rotation drive member, and the panel presser is screwed into the drive member and fixed to the step portion. The overload prevention device for a hoisting machine according to claim 1 or 2.
[4] 前記回転駆動部材は、環状リンクと、環状リンクの外周力 駆動部材の軸方向に延 びて突出し、操作手段の内周と幅方向に嵌合する複数の横長状突起を有し、前記 突起の駆動部材側端部に、駆動部材に設けた係合歯と嚙合する過負荷防止用係合 歯を設けたことを特徴とする請求項 1記載の卷上機における過負荷防止装置。  [4] The rotation drive member has an annular link and a plurality of horizontally elongated protrusions that extend in the axial direction of the annular link and drive in the axial direction of the annular link and fit in the inner circumference and the width direction of the operating means. 2. The overload prevention device for a hoisting machine according to claim 1, wherein an engagement tooth for preventing overload mating with an engagement tooth provided on the drive member is provided at an end of the protrusion on the drive member side.
[5] 前記過負荷防止用係合歯を突起の駆動部材側端部で、環状リンク端面から突出し て設けたことを特徴とする請求項 4記載の卷上機における過負荷防止装置。  5. The overload prevention device for a hoisting machine according to claim 4, wherein the overload prevention engagement teeth are provided so as to protrude from the end face of the annular link at the drive member side end of the protrusion.
[6] 前記環状リンクを横長状突起の長さに対して薄く形成したことを特徴とする請求項 4 または 5記載の卷上機における過負荷防止装置。  6. The overload prevention device for a hoisting machine according to claim 4, wherein the annular link is formed thin with respect to the length of the horizontally long protrusion.
[7] パネ部材は、駆動部材の外周に卷装され、回転駆動部材とパネ押え間に張設される コイルパネであることを特徴とする請求項 1記載の卷上機における過負荷防止装置。  7. The overload preventing device for a hoisting machine according to claim 1, wherein the panel member is a coil panel that is mounted on the outer periphery of the drive member and is stretched between the rotary drive member and the panel presser.
[8] コイルバネは、大径コイルパネと、大径コイルパネの内側に重層される小径コイルバ ネであることを特徴とする請求項 7記載の卷上機における過負荷防止装置。 8. The overload prevention device for a hoisting machine according to claim 7, wherein the coil spring is a large-diameter coil panel and a small-diameter coil panel layered inside the large-diameter coil panel.
[9] パネ押えは、回転駆動部材の空転方向と同方向に回転時に、駆動部材に設けた係 止段部と当接し、駆動部材に締着するように螺着されることを特徴とする請求項 1〜3 、 7〜8のレ、ずれかに記載の卷上機における過負荷防止装置。 [9] The panel presser is screwed so as to come into contact with a locking step provided on the driving member and fasten to the driving member when rotating in the same direction as the idling direction of the rotary driving member. The overload prevention device for a hoist according to any one of claims 1 to 3 and 7 to 8.
[10] バネ押えは、操作手段の内径より大径の外径を有し、ハンドホイールの内周端面に 設けた環状ガイド部に摺接させ、ハンドホイールをガイドすることを特徴とする請求項 9記載の卷上機における過負荷防止装置。  [10] The spring retainer has an outer diameter larger than an inner diameter of the operation means, and slides on an annular guide portion provided on an inner peripheral end surface of the handwheel to guide the handwheel. The overload prevention device for the hoisting machine according to 9.
[11] 操作手段は、駆動部材及びパネ押え間に所定の隙間を有して設けられることを特徴 とする請求項 1または 2に記載の卷上機における過負荷防止装置。  11. The overload prevention device for a hoisting machine according to claim 1 or 2, wherein the operating means is provided with a predetermined gap between the driving member and the panel presser.
PCT/JP2006/303981 2005-03-29 2006-03-02 Overload prevention device in hoist WO2006103866A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2005-094070 2005-03-29
JP2005094070A JP4698265B2 (en) 2005-03-29 2005-03-29 Rotation drive device for hoisting machine
JP2005-094069 2005-03-29
JP2005094069A JP4698264B2 (en) 2005-03-29 2005-03-29 Overload prevention device for hoisting machine
JP2005094851A JP4698266B2 (en) 2005-03-29 2005-03-29 Overload prevention device for hoisting machine
JP2005-094851 2005-03-29

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE112006000681.9T DE112006000681B4 (en) 2005-03-29 2006-03-02 Device for preventing an overload of a hoist
KR1020077022142A KR101156519B1 (en) 2005-03-29 2006-03-02 Overload prevention apparatus in hoist
CN2006800092740A CN101146735B (en) 2005-03-29 2006-03-02 Overload prevention apparatus in hoist
US11/886,313 US7575223B2 (en) 2005-03-29 2006-03-02 Overload preventing apparatus in hoist

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US9488232B1 (en) * 2015-06-16 2016-11-08 Columbus Mckinnon Corporation Externally adjustable clutch
JP6645901B2 (en) * 2016-04-25 2020-02-14 株式会社キトー Chain block

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56165695A (en) * 1981-04-27 1981-12-19 Nakamoto Tekkosho Kk Maintenance device for traction hoist
JPS60202093A (en) * 1984-03-22 1985-10-12 Vital Chain Block Mfg Preventive device for overload of winder
JP2000351584A (en) * 1999-06-07 2000-12-19 Vital Kogyo Kk Winch with overloard prevention device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56165695A (en) * 1981-04-27 1981-12-19 Nakamoto Tekkosho Kk Maintenance device for traction hoist
JPS60202093A (en) * 1984-03-22 1985-10-12 Vital Chain Block Mfg Preventive device for overload of winder
JP2000351584A (en) * 1999-06-07 2000-12-19 Vital Kogyo Kk Winch with overloard prevention device

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TW200702281A (en) 2007-01-16
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DE112006000681T5 (en) 2008-02-07
TWI330617B (en) 2010-09-21

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