JPS641348Y2 - - Google Patents

Info

Publication number
JPS641348Y2
JPS641348Y2 JP1982099925U JP9992582U JPS641348Y2 JP S641348 Y2 JPS641348 Y2 JP S641348Y2 JP 1982099925 U JP1982099925 U JP 1982099925U JP 9992582 U JP9992582 U JP 9992582U JP S641348 Y2 JPS641348 Y2 JP S641348Y2
Authority
JP
Japan
Prior art keywords
clutch
valve
switching valve
load
suspended
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP1982099925U
Other languages
Japanese (ja)
Other versions
JPS595589U (en
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 filed Critical
Priority to JP9992582U priority Critical patent/JPS595589U/en
Publication of JPS595589U publication Critical patent/JPS595589U/en
Application granted granted Critical
Publication of JPS641348Y2 publication Critical patent/JPS641348Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Control And Safety Of Cranes (AREA)
  • Jib Cranes (AREA)

Description

【考案の詳細な説明】 本考案は油圧ウインチのクラツチ制御装置に関
するものである。クレーン車等に使用される油圧
ウインチにおいては、作業能率を向上させるため
にウインチドラムと駆動装置間にクラツチを設け
て、吊りフツクを自由落下できるようにすること
が行なわれている。しかし従来は、吊りフツクで
荷を吊つているか否かにかかわらず、クラツチを
断状態にすることができたため、誤つて荷を吊つ
た状態でクラツチを切ることにより、吊荷が落下
する危険があつた。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch control device for a hydraulic winch. In hydraulic winches used for crane trucks and the like, in order to improve work efficiency, a clutch is provided between the winch drum and the drive device to allow the hanging hook to fall freely. However, in the past, the clutch could be disengaged regardless of whether or not a load was suspended using the hoisting hook, so there was a risk that the hoisted load would fall if the clutch was accidentally disengaged with the load suspended. It was hot.

本考案は上記の事情にかんがみてなされたもの
であり、荷を吊つているか否かを検出する吊荷検
出器と、クラツチシリンダと圧油補給管路または
戻り管路を選択的に連結するクラツチ切換弁と、
この戻り管路に挿入され前記吊荷検出器からの信
号により作動するシヤツトオフ弁とを備えること
により、荷を吊つた状態で誤動作をしても、クラ
ツチが断状態になることのない油圧ウインチのク
ラツチ制御装置を提供することを目的とするもの
である。
The present invention was developed in view of the above circumstances, and includes a suspended load detector that detects whether or not a load is suspended, and a clutch that selectively connects the clutch cylinder and the pressure oil supply pipe or return pipe. a switching valve;
The hydraulic winch is equipped with a shut-off valve that is inserted into the return pipe and is activated by a signal from the suspended load detector, so that the clutch will not be disconnected even if it malfunctions while a load is suspended. The object of the present invention is to provide a clutch control device.

以下、図面により本考案の実施例について説明
する。ポンプ2の吐出管路4は切換弁5に連結さ
れ、切換弁5と基台旋回モータ6は管路7,8に
より連結されており、切換弁5の操作によりモー
タ6は正逆転する。切換弁5のキヤリオーバ管路
9はチエツク弁10を介して切換弁11に連結さ
れ、切換弁11とウインチ駆動モータ15は管路
12,13により連結され、切換弁11の操作に
よりモータ15は正逆転する。14はカウンタバ
ランス弁、16はモータ15とカウンタバランス
弁の間に備えられた圧力スイツチであり、ウイン
チにより荷を吊上げた状態においてモータ15と
カウンタバランス弁14間に発生する圧力により
作動し、荷を吊つていないときには作動が解除さ
れ、吊荷検出器として作用する。
Embodiments of the present invention will be described below with reference to the drawings. The discharge pipe 4 of the pump 2 is connected to a switching valve 5, and the switching valve 5 and the base rotation motor 6 are connected by pipes 7 and 8, and when the switching valve 5 is operated, the motor 6 is rotated in forward and reverse directions. The carryover pipe 9 of the switching valve 5 is connected to the switching valve 11 via the check valve 10, and the switching valve 11 and the winch drive motor 15 are connected through the pipes 12 and 13. Reverse. 14 is a counterbalance valve, and 16 is a pressure switch provided between the motor 15 and the counterbalance valve, which is activated by the pressure generated between the motor 15 and the counterbalance valve 14 when a load is lifted by a winch, and When no load is being lifted, the operation is canceled and it functions as a suspended load detector.

ポンプ3の吐出管路18は切換弁19に連結さ
れ、切換弁19とアウトリガシリンダ22は管路
20,21により連結され、切換弁19の操作に
よりシリンダ22は伸縮する。切換弁19のキヤ
リオーバ管路23は分岐して、一方の管路はチエ
ツク弁24を介して圧油補給管路34によりクラ
ツチ切換弁26に連結され、チエツク弁24とク
ラツチ切換弁26の間にはアキユムレータ25が
連結されている。クラツチ切換弁26とクラツチ
シリンダ27は管路28により連結され、クラツ
チ切換弁26の戻り管路29は電磁シヤツトオフ
弁30を介してリザーバ1に連結され、この電磁
シヤツトオフ弁30は前記した吊荷検出器である
圧力スイツチ16によつて作動される。分岐した
他方の管路はアンロード弁31を介してポンプ2
側のチエツク弁10と切換弁11間のキヤリオー
バ管路9に連結され、アンロード弁31のパイロ
ツト管路33はアキユムレータ25に連結されて
おり、アキユムレータ25の圧力がカツトアウト
圧に達するまではアンロード弁31は遮断状態に
なり、ポンプ3からの吐出油はアキユムレータ2
5に蓄圧され、アキユムレータ25の圧力がカツ
トアウト圧に達するとアンロード弁31は連通状
態になり、ポンプ3からの吐出油はキヤリオーバ
管路9に送られ、アキユムレータ25の圧力がカ
ツトイン圧まで低下するとアンロード弁31は遮
断状態になり、再度アキユムレータ25に蓄圧さ
れる。
The discharge pipe 18 of the pump 3 is connected to a switching valve 19, the switching valve 19 and the outrigger cylinder 22 are connected by pipes 20, 21, and the cylinder 22 expands and contracts by operating the switching valve 19. The carryover line 23 of the switching valve 19 is branched, and one line is connected to the clutch switching valve 26 via a check valve 24 and a pressure oil supply line 34, and between the check valve 24 and the clutch switching valve 26, is connected to an accumulator 25. The clutch switching valve 26 and the clutch cylinder 27 are connected by a pipe 28, and the return pipe 29 of the clutch switching valve 26 is connected to the reservoir 1 via an electromagnetic shut-off valve 30. It is operated by a pressure switch 16 which is a pressure switch. The other branched pipe is connected to the pump 2 via the unload valve 31.
The pilot line 33 of the unload valve 31 is connected to the carryover line 9 between the check valve 10 and the switching valve 11 on the side, and the pilot line 33 of the unload valve 31 is connected to the accumulator 25. The valve 31 is in a cutoff state, and the oil discharged from the pump 3 is transferred to the accumulator 2.
When the pressure in the accumulator 25 reaches the cut-out pressure, the unload valve 31 becomes in communication, and the oil discharged from the pump 3 is sent to the carryover pipe 9, and when the pressure in the accumulator 25 drops to the cut-in pressure. The unload valve 31 enters the cutoff state, and the pressure is accumulated in the accumulator 25 again.

上記の構成により、荷を吊つていない状態にお
いては、モータ15とカウンタバランス弁14間
の管路に一定以上の圧力は発生しないので、圧力
スイツチ16は作動せず、したがつて電磁シヤツ
トオフ弁30は図に示すd位置に保持され、クラ
ツチ切換弁26とリザーバ1は連通しているの
で、クラツチ切換弁26を接位置aにしておけば
クラツチシリンダ27に圧油が供給されてクラツ
チは接状態に保持され、クラツチ切換弁26を断
位置bに切換えると、クラツチシリンダ27はリ
ザーバ1と連通しクラツチは断状態になり、吊り
フツクは自由落下する。
With the above configuration, when no load is suspended, pressure above a certain level does not occur in the pipeline between the motor 15 and the counterbalance valve 14, so the pressure switch 16 does not operate, and therefore the electromagnetic shut-off valve 30 is held at the d position shown in the figure, and the clutch switching valve 26 and the reservoir 1 are in communication, so if the clutch switching valve 26 is set to the close position a, pressure oil is supplied to the clutch cylinder 27 and the clutch is engaged. When this state is maintained and the clutch switching valve 26 is switched to the disengaged position b, the clutch cylinder 27 communicates with the reservoir 1, the clutch becomes disengaged, and the hanging hook falls freely.

荷を吊つた状態においては、モータ15とカウ
ンタバランス弁14間の管路に一定以上の圧力が
発生するので、圧力スイツチ16が作動して電磁
シヤツトオフ弁30がc位置に切換わり、クラツ
チ切換弁26とリザーバ1は遮断される。したが
つて、誤つてクラツチ切換弁26を断位置bに切
換えてもクラツチシリンダ27はリザーバ1と連
通しないので、クラツチは断状態にならず、吊荷
が落下することはない。
When a load is suspended, a pressure above a certain level is generated in the line between the motor 15 and the counterbalance valve 14, so the pressure switch 16 is activated and the electromagnetic shut-off valve 30 is switched to position c, and the clutch switching valve is activated. 26 and reservoir 1 are shut off. Therefore, even if the clutch switching valve 26 is accidentally switched to the disengaged position b, the clutch cylinder 27 will not communicate with the reservoir 1, so the clutch will not be disengaged and the suspended load will not fall.

以上の様に、本考案によれば簡単な構造によ
り、荷を吊つた状態で誤操作をしてもクラツチが
断状態になることのない油圧ウインチのクラツチ
制御装置が提供され、クレーンの安全性向上に有
効である。
As described above, the present invention provides a clutch control device for a hydraulic winch that has a simple structure and does not cause the clutch to disengage even if the clutch is operated incorrectly while a load is suspended, thereby improving the safety of cranes. It is effective for

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

第1図は本考案の実施例を示す一部省略回路図
である。 16……圧力スイツチ(吊荷検出器)、26…
…クラツチ切換弁、27……クラツチシリンダ、
29……戻り管路、30……電磁シヤツトオフ
弁、34……圧油補給管路。
FIG. 1 is a partially omitted circuit diagram showing an embodiment of the present invention. 16...Pressure switch (hanging load detector), 26...
...Clutch switching valve, 27...Clutch cylinder,
29...Return pipe line, 30...Electromagnetic shut-off valve, 34...Pressure oil supply pipe line.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 荷を吊つているか否かを検出する吊荷検出器
と、クラツチシリンダと圧油補給管路または戻り
管路を選択的に連結するクラツチ切換弁と、この
戻り管路に挿入され前記吊荷検出器からの信号に
より作動するシヤツトオフ弁とを備えたことを特
徴とする油圧ウインチのクラツチ制御装置。
a suspended load detector for detecting whether a load is suspended; a clutch switching valve for selectively connecting the clutch cylinder and a pressure oil supply line or a return line; A clutch control device for a hydraulic winch, characterized in that it is equipped with a shutoff valve that is operated by a signal from a hydraulic winch.
JP9992582U 1982-06-30 1982-06-30 Hydraulic winch clutch control device Granted JPS595589U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9992582U JPS595589U (en) 1982-06-30 1982-06-30 Hydraulic winch clutch control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9992582U JPS595589U (en) 1982-06-30 1982-06-30 Hydraulic winch clutch control device

Publications (2)

Publication Number Publication Date
JPS595589U JPS595589U (en) 1984-01-13
JPS641348Y2 true JPS641348Y2 (en) 1989-01-12

Family

ID=30236599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9992582U Granted JPS595589U (en) 1982-06-30 1982-06-30 Hydraulic winch clutch control device

Country Status (1)

Country Link
JP (1) JPS595589U (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60150085U (en) * 1984-03-16 1985-10-05 株式会社 寿 Shape pencil

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56122793A (en) * 1980-03-04 1981-09-26 Hitachi Construction Machinery Oil pressure circuit for operating hoisting motor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56148085U (en) * 1981-04-03 1981-11-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56122793A (en) * 1980-03-04 1981-09-26 Hitachi Construction Machinery Oil pressure circuit for operating hoisting motor

Also Published As

Publication number Publication date
JPS595589U (en) 1984-01-13

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