WO1996009979A1 - Procede et appareil permettant d'empecher l'enroulement excessif d'un treuil dans une grue mobile - Google Patents

Procede et appareil permettant d'empecher l'enroulement excessif d'un treuil dans une grue mobile Download PDF

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Publication number
WO1996009979A1
WO1996009979A1 PCT/JP1995/001929 JP9501929W WO9609979A1 WO 1996009979 A1 WO1996009979 A1 WO 1996009979A1 JP 9501929 W JP9501929 W JP 9501929W WO 9609979 A1 WO9609979 A1 WO 9609979A1
Authority
WO
WIPO (PCT)
Prior art keywords
hook
winch
winding
pressure
valve
Prior art date
Application number
PCT/JP1995/001929
Other languages
English (en)
Japanese (ja)
Inventor
Shinya Koshii
Original Assignee
Komatsu Ltd.
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
Application filed by Komatsu Ltd. filed Critical Komatsu Ltd.
Publication of WO1996009979A1 publication Critical patent/WO1996009979A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/88—Safety gear
    • B66C23/90—Devices for indicating or limiting lifting moment
    • B66C23/905—Devices for indicating or limiting lifting moment electrical

Definitions

  • the present invention relates to a winch overwinding method for a mobile crane and an apparatus therefor, and more particularly to a winch overwinding prevention method for a mobile crane when winding up a wire rope and an apparatus therefor.
  • a conventional mobile crane has a sheave bracket 4 with sheaves 2 and 3 attached to the end of a boom 1, and a hook 6 for hanging loads with a wire rope 5.
  • the wire rope 5 is driven by a hydraulically driven ⁇ inch (not shown).
  • a sheave bracket is attached to the contact surfaces 7, 8 between the sheave bracket 4 and the hook 6 by using a rubber cushion (not shown).
  • the reduction of shock by this measure was not enough. Disclosure of the invention
  • the present invention has been made to solve the problems of the related art, and it is intended to prevent a winch of a movable crane from being excessively wound when a hook is wound up and fixed. It is an object to provide a method and an apparatus thereof.
  • the hook for hanging load is wound up by a hydraulically driven winch, and the hook is brought into contact with a member at the end of the boom so as to abut the hook.
  • the method of winding the movable crane winch In the method of winding the movable crane winch,
  • the hydraulic pressure and hydraulic oil amount to the hydraulic drive winch are reduced, and in this reduced state, It is characterized by winding up, hooking the hook and the member, and fixing them.
  • a winch overwind prevention device for a mobile crane includes a hydraulic pump, a hydraulic drive winch driven by the hydraulic pump, and a hanging load hook wound up by the hydraulic drive winch. At the crane winch hoist,
  • a take-up position detection sensor that detects the hook position
  • a control device that receives a signal from the take-up position detection sensor and transmits a control signal, and a flow rate that receives the control signal and reduces the discharge amount of the hydraulic pump It is characterized by comprising control means, and pressure control means for reducing the discharge pressure of the hydraulic pump in response to a control signal.
  • the winding position detection sensor detects the distance between the hook and the member,
  • the control device that has received this detection signal transmits a control signal to the flow i control means and the pressure control means to reduce the flow rate and the pressure.
  • FIG. 1A and 1B are views of the tip of a boom provided with a winding position detection sensor according to an embodiment of the present invention
  • FIG. 1A shows a case where a distance between a hook and a sheave bracket is equal to or greater than a predetermined value L.
  • FIG. 1B is a side view at a predetermined value L or less,
  • FIG. 2 is an explanatory diagram of a panel of a control device for crane work according to the embodiment
  • FIG. 3 is a hydraulic circuit diagram of a winch control system according to the embodiment
  • FIG. 4 is a flow chart when the hook is stored according to the embodiment.
  • Fig. 5 is a side view of the boom tip according to the prior art
  • FIG. 6 is a side view showing a hook fixing state according to a conventional technique.
  • a sheave bracket (member at the end of the boom) 4 that holds sheaves 2 and 3 is fixed to the end of the boom 1, and a hook 6 is suspended by a wire rope 5 wound around the sheaves 2 and 3.
  • a winding position detection sensor 10 is axially mounted on a side surface of the sheave bracket 4 by a pin 11.
  • a rod 14 is suspended via a wire 13 from a rod 12 provided at the tip of the winding position detection sensor 10 so as to protrude.
  • the winding position detecting sensor 10 detects that the wire 6 is in a state where the downward force due to the wire 14 is applied to the rod 12, that is, the distance between the hook 6 and the sheave bracket 4 becomes a predetermined value L or more. If tension is generated at 13, the switch is ON. 15 is ground.
  • the overwind alarm LED 21 is lit when the winding position detection sensor 10 becomes 0 FF.
  • the overwind alarm release switch 22 is turned ON, the overwind alarm release LED 23 is lit, but the overwind alarm LED 21 is turned off.
  • the control device 20 also has a function as a moment limiter.
  • reference numeral 30 denotes a swash plate type variable displacement S-type hydraulic pump (hereinafter referred to as main pump 30), 31 denotes a swash plate control cylinder (flow control means), and a load sensing valve 3 2 ( Hereinafter, the LS valve 32 will control the swash plate control cylinder 31 that determines the discharge amount of the main pump 30.
  • Pilot pump 33 and main pump 30 are driven by engine 34.
  • Reference numeral 35 denotes an electromagnetic variable pressure regulating valve (pressure control means; hereinafter, referred to as an electromagnetic regulating valve 35) of the main pump 30, and 36 denotes a pressure regulating valve of the pilot pump 33.
  • a winch operation valve 42 is provided via a pressure supplementary valve 41. The position A of the winch operation valve 42 is winding up, the position B is neutral, and the position C is winding down.
  • a hydraulic motor 43 (hereinafter referred to as a hydraulic motor 43) for driving the winch is provided downstream of the winch operating valve 42.
  • a counterbalance valve 70 is provided between the winch operation valve 42 and the hydraulic motor 43.
  • Branch from discharge circuit 40 In the circuit 44, a swash plate pressure control valve 45 is provided in addition to the pressure compensation valve 41.
  • One pilot port 32 a of the LS valve 32 is connected to the discharge circuit 40, and the other pilot port 32 b is connected to the swash plate pressure control valve 4 via an electromagnetic switching valve 46. It is closely related to 5.
  • the pilot port pressure control valve 50 having the winch operation lever 51 is connected to the discharge circuit 33 a of the pilot pump 33 via the electromagnetic safety valve 52.
  • the electromagnetic safety valve 52 is connected to the safety lock lever 53.
  • the pilot circuit 54 on the upper side of the pilot pressure control valve 50 is connected to the upper side of the winch operation valve 42 via an electromagnetic hoist stop valve 55, and the pilot pressure control valve 50
  • a pilot circuit 56 on the lower side of the winch is connected to the lower side of the winch operation valve 42.
  • the winch hoisting switch 57 that switches to ON or OFF by hydraulic pressure is connected to the pilot circuit 5 of the pilot pressure control valve 50.
  • the winch winding switch 57 and the relay switch 58 are arranged in series on a circuit connecting the battery 59 and the electromagnetic switching valve 46.
  • the relay switch 58 is turned on by a command from the control device 20.
  • the control device 20 is in contact with the winding position detection sensor 10, the electromagnetic adjustment valve 35 of the main pump 30, the electromagnetic winding stop valve 55, and the coil of the relay switch 58, respectively. .
  • step 101 the operator operates the winch operation lever 51 to the winding side, and pressurizes oil from the pilot pump 33 through the pilot circuit 54 and the electromagnetic winding stop valve 55 to winch. It is sent to the operation part 4 2 a of the operation valve 42. As a result, the winch operation valve 42 is switched to the position A on the winding side, and the winch of the hook 6 is wound.
  • step 102 if the signal from the winding position detection sensor 10 to the control device 20 is switch ON, that is, if the distance between the hook 6 and the sheave bracket 4 is equal to or greater than the predetermined value L, Return to step 101 to continue winding.
  • the process proceeds to step 103, and the control device 20 sets the electromagnetic winding stop valve 5 Send a signal to 5 and switch the electromagnetic winding stop valve 5 5 from position B to position A to stop winding. That is, the electromagnetic hoisting stop valve 55 closes the hoisting pilot circuit 54 from the pilot pressure control valve 50 and the pilot pressure acting on the winch operating valve 42. Is released into the tank, and the winch operation is stopped by returning the winch operation valve 42 to the neutral position B. At the same time, the controller 10 turns on the overwind alarm LED 21 in response to a signal from the winding position detection sensor 10.
  • step 104 the operator turns the overwind alarm release switch 22 ON to turn off the overwind alarm LED21 and turn on the overwind alarm release LED23.
  • step 105 the overwind alarm release switch 22 receives the signal of 0 N, and the control device 20 switches the electromagnetic hoist stop valve 55 from the A position to the B position, and Open the pilot circuit 54 and release the hoisting stop. Further, the control device 20 sends a signal to the relay switch 58 to connect it.
  • step 106 the operator operates the winch operation lever 51 to the winding side. As a result, a pilot pressure is generated in the pilot circuit 54, so that the winch switch 57 is connected. Then, current flows from the battery 59 to the solenoid-operated switching valve 46, and the solenoid-operated switching valve 46 is set to the B position, and the pilot of the LS valve 32 is Shut off LS pressure to port 32b and switch LS valve 32 to position A. By this switching, the pressure oil from the main pump 30 acts on the swash plate control cylinder 31 via the A position of the LS valve 32, and moves the piston 31a to the right in the drawing. By this movement, the discharge amount of the main pump 30 is reduced (step 107).
  • step 108 the control device 20 sends a signal to the electromagnetic adjustment valve 35 to adjust the set pressure of the discharge line 40 of the main pump 30 to a low pressure, and the main pump 3 The discharge pressure of 0 is reduced.
  • the winch is in a rotating state in which the driving torque is generated by the low pressure at the low rotation speed.
  • step 109 the operator sees that the winch winding and the winding of the hook 6 have stopped, and sets the pinch operation lever 51 to the neutral position to complete the storage of the hook.
  • the wire rope 5 is wound up for a short time from the stop of winding up to the neutral position.However, since the winding speed is low and the winding torque is small, even if the wire rope 5 is slightly overwound, the wire rope 5 is not wound. The resulting tension is small. Therefore, the wound wire rope 5 does not bite into the wire port 5 that has been wound on the winch drum, and does not generate turbulence. Further, since the hoisting speed is low, the contact between the hook 6 and the sheave bracket 4 is also low, and damage to both due to impact contact or the like can be prevented.
  • the order of steps 107 and 108 may be interchanged.
  • the relief pressure may be reduced by reducing the discharge amount of the main pump 30 without providing the electromagnetic adjustment valve 35.
  • the winding position detection sensor 10 can be applied to any sensor that can detect whether or not the distance between the lower surface 8 of the bracket 4 and the upper surface 7 of the hook 6 is larger than a predetermined value L.
  • a general distance sensor such as a mechanical distance gauge or an infrared distance sensor, or a sensor having the same function as the distance sensor may be used.
  • the present invention when the hook is wound up and fixed, the wire rope to be wound up is
  • the present invention is useful as a winch overwinding method for a movable crane and a device therefor, which can prevent irregular winding caused by biting into a wire rope already wound on a winch drum.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Safety Of Cranes (AREA)
  • Jib Cranes (AREA)

Abstract

Procédé et appareil permettant d'empêcher l'enroulement excessif d'un treuil dans une grue mobile, de manière à prévenir l'enroulement incontrôlé d'un câble lors de la fixation d'un crochet. Ce procédé consiste à réduire la pression et le volume de l'huile de commande d'un treuil lorsque la distance entre un crochet (6) et un élément (4) devient égale ou inférieure à une valeur prédéterminée (L) lors de l'enroulement du crochet (6), et à poursuivre l'enroulement dans ces conditions de pression et volume réduits afin de permettre au crochet et à l'élément de se trouver en about. Le dispositif comprend en outre un détecteur de position d'enroulement (10) qui détecte la position du crochet (6), un dispositif de commande (20) qui génère un signal de commande lors de la réception d'un signal provenant du capteur (10), un organe de réglage de débit (31) et un organe de réglage de pression (35) permettant de réduire respectivement le volume de refoulement et la pression d'une pompe hydraulique (30).
PCT/JP1995/001929 1994-09-26 1995-09-25 Procede et appareil permettant d'empecher l'enroulement excessif d'un treuil dans une grue mobile WO1996009979A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6/257495 1994-09-26
JP25749594A JP3276130B2 (ja) 1994-09-26 1994-09-26 移動式クレーンのウインチ過巻時のワイヤロープ乱巻防止装置

Publications (1)

Publication Number Publication Date
WO1996009979A1 true WO1996009979A1 (fr) 1996-04-04

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ID=17307087

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1995/001929 WO1996009979A1 (fr) 1994-09-26 1995-09-25 Procede et appareil permettant d'empecher l'enroulement excessif d'un treuil dans une grue mobile

Country Status (3)

Country Link
JP (1) JP3276130B2 (fr)
KR (1) KR0182823B1 (fr)
WO (1) WO1996009979A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000021868A1 (fr) * 1998-10-14 2000-04-20 Hitachi Construction Machinery Co., Ltd. Dispositif de prevention de surenroulement pour un treuil
US6644629B1 (en) 1998-10-14 2003-11-11 Hitachi Construction Machinery Co., Ltd. Overwinding prevention device for winch
DE10153105B4 (de) * 2000-10-23 2005-04-28 Terex Demag Gmbh & Co Kg Automatisches Verfahren zum sicheren Ablegen und Aufnehmen einer Hakenflasche

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100721859B1 (ko) * 2001-07-31 2007-05-28 주식회사 포스코 크레인의 중추와이어의 감김방지 장치
JP4925575B2 (ja) * 2004-11-26 2012-04-25 株式会社小松製作所 作業車両の安全回路
CN102602816B (zh) * 2012-03-30 2014-08-06 刘德明 门桥式起重机吊钩行程双保险装置
JP6017846B2 (ja) * 2012-06-12 2016-11-02 株式会社タダノ クレーンの巻取装置
CN103663211B (zh) * 2013-12-31 2015-08-19 太原重工股份有限公司 起重机及其控制方法
CN103979422B (zh) * 2014-05-26 2015-11-18 中联重科股份有限公司 起重机安全行驶区域的控制系统、方法、装置及起重机
KR101642906B1 (ko) 2014-09-30 2016-07-26 주식회사 포스코 권과방지장치 및 이를 포함하는 기중기
CN104495671B (zh) * 2014-12-04 2017-05-10 中联重科股份有限公司 超起卷扬的控制方法、装置、系统及起重机
JP6717014B2 (ja) * 2016-04-08 2020-07-01 株式会社タダノ クレーン
CN109205488A (zh) * 2018-10-11 2019-01-15 湖北江汉建筑工程机械有限公司 一种基于多项式拟合曲线法的塔机弓板力矩限制器调试方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MICROFILM OF THE SPECIFICATION AND DRAWINGS ANNEXED TO THE WRITTEN APPLICATION OF JAPANESE UTILITY MODEL, Application No. 137933/1988, (Laid-open No. 57898/1990) (TADANO LTD.), 25 April 1990. *
MICROFILM OF THE SPECIFICATION AND DRAWINGS ANNEXED TO THE WRITTEN APPLICATION OF JAPANESE UTILITY MODEL, Application No. 93374/1990, (Laid-open No. 51493/1992) (TADANO LTD.), 30 April 1992. *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000021868A1 (fr) * 1998-10-14 2000-04-20 Hitachi Construction Machinery Co., Ltd. Dispositif de prevention de surenroulement pour un treuil
US6644629B1 (en) 1998-10-14 2003-11-11 Hitachi Construction Machinery Co., Ltd. Overwinding prevention device for winch
DE10153105B4 (de) * 2000-10-23 2005-04-28 Terex Demag Gmbh & Co Kg Automatisches Verfahren zum sicheren Ablegen und Aufnehmen einer Hakenflasche

Also Published As

Publication number Publication date
JPH0891772A (ja) 1996-04-09
KR0182823B1 (ko) 1999-10-01
JP3276130B2 (ja) 2002-04-22

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