JP2690051B2 - Crane hook device - Google Patents
Crane hook deviceInfo
- Publication number
- JP2690051B2 JP2690051B2 JP5188045A JP18804593A JP2690051B2 JP 2690051 B2 JP2690051 B2 JP 2690051B2 JP 5188045 A JP5188045 A JP 5188045A JP 18804593 A JP18804593 A JP 18804593A JP 2690051 B2 JP2690051 B2 JP 2690051B2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic cylinder
- double
- acting hydraulic
- valve
- closed
- 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 - Lifetime
Links
Landscapes
- Load-Engaging Elements For Cranes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、クレーンを用いた揚重
において、玉掛け、取付け時などにおいて、フックの微
少位置決めを行うためのクレーンのフック装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hook device for a crane, which is used for fine positioning of a hook during slinging, mounting, etc. in lifting using a crane.
【０００２】[0002]
【従来の技術】従来はオペレータと作業者間の合図によ
るインチング操作で行っている。2. Description of the Related Art Conventionally, an inching operation is performed by a signal between an operator and a worker.
【０００３】図１０にタワークレーンによる建物の鉄骨
建方の一例を示し、クレーンマスト１の上部に設けたベ
ース２上にはブーム３が起伏自在に設けられている。ま
たベース２の一端にはバランスウエイト４が設けられて
おり、中程に設けたウインチドラム５に巻回したワイヤ
ロープ６はブーム３の先端に設けたシーブを介して懸垂
され、その下端には吊りフック７が取付けられている。
このフック７には玉掛けワイヤ８が掛けられて鉄骨Ｗを
吊り下げている。FIG. 10 shows an example of a steel frame construction of a building by a tower crane, in which a boom 3 is movably provided on a base 2 provided on an upper portion of a crane mast 1. A balance weight 4 is provided at one end of the base 2, and a wire rope 6 wound around a winch drum 5 provided in the middle is suspended via a sheave provided at the tip of the boom 3 and at its lower end. A hanging hook 7 is attached.
A sling wire 8 is hung on the hook 7 to suspend the steel frame W.
【０００４】建物Ｂの鉄骨建方に際し、作業員Ｍ１が鉄
骨Ｗを見ながら作業員Ｍ２にクレーンの巻き上げ、巻き
下げを指示する。すると作業員Ｍ２はオペレータＭ３に
巻き上げ、巻き下げを指示する。そしてオペレータＭ３
は指示にしたがって鉄骨Ｗの上げ、下げを行う。When constructing the steel frame of the building B, the worker M1 looks at the steel frame W and instructs the worker M2 to hoist and lower the crane. Then, the worker M2 instructs the operator M3 to wind up and down. And operator M3
Follows the instructions and raises and lowers the steel frame W.
【０００５】従来の鉄骨建方において、立込む鉄骨Ｗを
作業員Ｍ１が上げ下げさせたい場合、一寸上げ、一寸下
げと指示するが、作業員Ｍ１の思い通りに上げ下げさせ
るのはオペレータＭ３にとって困難であり、特に微少の
位置決めは難しい。そこで最近、あたかも無重力のよう
に作業員が吊荷を上下、前後、左右、斜めの任意の方向
に自由に移動できる３次元油圧バランスアームを搭載し
た建設機械が開発されている。しかしこのものは構造、
制御が複雑で高価である。In the conventional steel erection, when the worker M1 wants to raise and lower the steel frame W to be lifted, he / she gives an instruction to raise and lower by one dimension, but it is difficult for the operator M3 to raise and lower as desired. , It is especially difficult to position very finely. Therefore, recently, a construction machine equipped with a three-dimensional hydraulic balance arm has been developed which allows a worker to freely move a suspended load in any direction such as up and down, front and rear, left and right, as if it were weightless. But this one is a structure,
Control is complicated and expensive.
【０００６】フックの位置を微調整するために、フック
に複動油圧シリンダとを組合せた技術は知らてれおり、
例えば特開昭５１−２７２６２号公報、特開平５−１６
３００号公報、実公昭５７−６７０７６号公報等に開示
されている。しかしながら、かかる公知技術では建築作
業における種々の作業例えば地切り、揚重搬送、バラン
ス上昇、下降等に対応できず、装置も複雑である。A technique is known in which a hook is combined with a double-acting hydraulic cylinder in order to finely adjust the position of the hook.
For example, JP-A-51-27262 and JP-A-5-16
No. 300, Japanese Utility Model Publication No. 57-67076, and the like. However, such a known technique cannot cope with various works in construction work, such as ground cutting, lifting and lifting, balance raising and lowering, and the apparatus is complicated.
【０００７】[0007]
【発明が解決しようとする課題】したがって本発明は、
バランス作動によりフックの位置の微調整は勿論のこ
と、その他の作業も容易に行うことができ、しかも構造
が簡単なクレーンのフック装置を提供することを目的と
している。Accordingly, the present invention provides
It is an object of the present invention to provide a hook device for a crane, which is capable of finely adjusting the position of the hook by the balance operation and easily performing other work, and has a simple structure.
【０００８】[0008]
【課題を解決するための手段】本発明によれば、クレー
ンの吊りワイヤロープの下端に取付けられたクレーンの
フック装置において、ロードセルを有する複動油圧シリ
ンダを具備し、その複動油圧シリンダに圧油を供給する
アキュムレータと、その複動油圧シリンダの圧油を受け
るリザーバタンクと、複動油圧シリンダからリザーバタ
ンクに至る油路に設けた第１のバルブと、リザーバタン
クから複動油圧シリンダに至る油路に設けられた第２の
バルブと、アキュムレータから複動油圧シリンダに至る
油路に設けた第３のバルブと、複動油圧シリンダからア
キュムレータに至る油路に設けた第４のバルブとを備
え、複動油圧シリンダにはバネが設けられ、そしてロー
ドセルからの荷重信号により第１ないし第４のバルブを
開閉するバルブ制御装置を備え、そのバルブ制御装置は
地切り時は第１ないし第３のバルブを閉とし、第４のバ
ルブを開とし、揚重搬送時はすべてのバルブを閉とし、
バランス上昇時は第３のバルブのみを開としてアキュム
レータの圧油で複動油圧シリンダを上昇させ、バランス
下降時に第４のバルブのみを開として複動油圧シリンダ
の下降による圧力を発生させ、また第１のバルブのみを
開とすると複動油圧シリンダが下降して油はリザーバタ
ンクに流れ、戻り時は第２のバルブのみを開としてバネ
１５により複動油圧シリンダが上昇してリザーバタンク
から油が供給される機能を有している。According to the present invention, a hook device for a crane attached to the lower end of a hanging wire rope of a crane comprises a double-acting hydraulic cylinder having a load cell, and the double-acting hydraulic cylinder is provided with a double-acting hydraulic cylinder. An accumulator that supplies oil, a reservoir tank that receives pressure oil from the double-acting hydraulic cylinder, a first valve provided in an oil passage from the double-acting hydraulic cylinder to the reservoir tank, and a double-acting hydraulic cylinder from the reservoir tank A second valve provided in the oil passage, a third valve provided in the oil passage extending from the accumulator to the double-acting hydraulic cylinder, and a fourth valve provided in the oil passage extending from the double-acting hydraulic cylinder to the accumulator. The double-acting hydraulic cylinder is provided with a spring, and the valve control for opening and closing the first to fourth valves by a load signal from the load cell. Includes a location, the valve control device when the earth cut is closed the first, second, and third valves, the fourth valve is opened during the lifting conveyor is all the valves closed,
When the balance is raised, only the third valve is opened to raise the double-acting hydraulic cylinder with the pressure oil of the accumulator, and when the balance is lowered, only the fourth valve is opened to generate the pressure due to the lowering of the double-acting hydraulic cylinder. When only the valve 1 is opened, the double-acting hydraulic cylinder descends and the oil flows to the reservoir tank. When returning, only the second valve is opened and the spring 15 raises the double-acting hydraulic cylinder to remove the oil from the reservoir tank. It has a function to be supplied.
【０００９】[0009]
【作用効果の説明】したがって、地切り時には複動油圧
シリンダが下降して複動油圧シリンダからアキュムレー
タに油が流れてアキュムレータに蓄圧される。このアキ
ュムレータに蓄圧された油はバランス上昇時に複動油圧
シリンダを上昇させるのに使用される。また揚重搬送時
にはすべてのバルブを閉じてロックさせるので、通常の
作業と同様である。そして、バランス下降時には複動油
圧シリンダの油はリザーバタンクに流れ、そして戻り時
はバネの作用により複動油圧シリンダは上昇し、このと
き油はリザーバタンクから複動油圧シリンダに流れる。
このように本発明によればバルブ制御装置により微少位
置決め作業を行うことまができると共に、第１ないし第
４のバルブ操作により各種の作業シーケンスが可能とな
る。またアキュムレータを用いているのでポンプ等の動
力源が不要となり構造が簡単となる。[Description of Operation and Effects] Therefore, at the time of ground cutting, the double-acting hydraulic cylinder descends, oil flows from the double-acting hydraulic cylinder to the accumulator, and pressure is accumulated in the accumulator. The oil accumulated in the accumulator is used to raise the double-acting hydraulic cylinder when the balance rises. In addition, since all valves are closed and locked during lifting and conveying, the procedure is the same as normal work. When the balance is lowered, the oil in the double-acting hydraulic cylinder flows to the reservoir tank, and when returning, the double-acting hydraulic cylinder rises due to the action of the spring, and at this time, the oil flows from the reservoir tank to the double-acting hydraulic cylinder.
As described above, according to the present invention, it is possible to perform a minute positioning work by the valve control device, and various work sequences can be performed by operating the first to fourth valves. Further, since the accumulator is used, a power source such as a pump is unnecessary and the structure is simplified.
【００１０】[0010]
【実施例】図１、図２及び図３、図４に本発明を実施し
たクレーンのフック装置の外観が示されており、そのフ
ック１０は、後述のロードセルを備えた複動油圧シリン
ダによりなるバランサ１１を介してクレーンの吊りワイ
ヤロープ１２の下端に取付けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The appearance of a hook device for a crane embodying the present invention is shown in FIGS. 1, 2 and 3 and 4, and the hook 10 is a double-acting hydraulic cylinder equipped with a load cell, which will be described later. It is attached to the lower end of a hanging wire rope 12 of the crane via a balancer 11.
【００１１】図５及び図６に微少な力で重量物の位置決
めをする概要を示し、図５に示すように、作業員が荷を
上に持ち上げる操作力（矢印上方）をフック１０に加え
ると、バランサ１１が後述の態様で作動し、フック１０
が上昇して位置決めする。また、図６に示すように、作
業員が荷を引き下げる操作力（矢印下方）をフック１０
に加えると、バランサ１１が後述の態様で作動し、フッ
ク１０が下降して位置決めする。FIGS. 5 and 6 show an outline of positioning a heavy object with a slight force. As shown in FIG. 5, when an operating force (upward arrow) for an operator to lift a load is applied to the hook 10. , The balancer 11 operates in the manner described below, and the hook 10
Moves up to position. Further, as shown in FIG. 6, the hook 10 applies an operation force (downward arrow) for the worker to pull down the load.
In addition, the balancer 11 operates in the manner described below, and the hook 10 descends and is positioned.
【００１２】図７にバランサの詳細を示し、バランサは
ロードセル１３を備えた複動油圧シリンダ１４、油圧シ
リンダに設けたシリンダ上昇用のバネ１５（図８）、ロ
ードセル１３の荷重信号によりバルブＶ１〜Ｖ４を開閉
するバルブ制御装置１６、シリンダ１４に圧油を供給す
るアキュムレータ１７、シリンダ１４から油が戻るリザ
ーバタンク１８からなり、フック１０はロードセル１３
を備えた複動油圧シリンダ１４を介してクレーンの吊り
ワイヤロープ１２の下端に取付けられている。なお、自
明の如く、図示しないタンクおよびポンプが設けられて
いる。FIG. 7 shows details of the balancer. The balancer includes a double-acting hydraulic cylinder 14 having a load cell 13, a spring 15 (FIG. 8) for raising the cylinder provided in the hydraulic cylinder, and valves V1 to V1 depending on load signals from the load cell 13. The hook 10 includes a valve controller 16 for opening and closing V4, an accumulator 17 for supplying pressure oil to the cylinder 14, and a reservoir tank 18 for returning oil from the cylinder 14.
It is attached to the lower end of the hanging wire rope 12 of the crane via a double-acting hydraulic cylinder 14 equipped with. Incidentally, as is obvious, a tank and a pump (not shown) are provided.
【００１３】図８に本発明の第１実施例に係るバランサ
を示し、Ｖ１〜Ｖ４は第１ないし第４のバルブ、ＢＶは
ブースタバルブであり、作業シーケンスとバルブ開閉の
対応は次の様なものである。なお、図示の例では第１な
いし第４のバルブＶ１〜Ｖ４はチェックバルブを用いて
いる。FIG. 8 shows a balancer according to a first embodiment of the present invention. V1 to V4 are first to fourth valves, BV is a booster valve, and the correspondence between the work sequence and the valve opening / closing is as follows. It is a thing. In the illustrated example, the first to fourth valves V1 to V4 are check valves.
【００１４】地切り時は、ロードセル１３の荷重信号に
基づきバルブ制御装置１６によりバルブＶ１〜Ｖ３を
閉、バルブＶ４を開とする。シリンダ１４の下降による
圧力発生。At the time of ground cutting, the valves V1 to V3 are closed and the valve V4 is opened by the valve controller 16 based on the load signal of the load cell 13. Pressure is generated by lowering the cylinder 14.
【００１５】揚重搬送時は、バルブＶ１〜Ｖ４を閉と
し、シリンダ１４をロックとする。During lifting and carrying, the valves V1 to V4 are closed and the cylinder 14 is locked.
【００１６】バランス上昇時は、バルブＶ１、Ｖ２、Ｖ
４を閉、バルブＶ３を開とする。アキュムレータ１７に
よる圧油供給でシリンダ１４が上昇。When the balance is raised, the valves V1, V2, V
4 is closed and valve V3 is opened. The cylinder 14 is raised by the pressure oil supplied by the accumulator 17.
【００１７】バランス下降時は、バルブＶ１〜Ｖ３を
閉、バルブＶ４を開とする。シリンダ１４の下降による
圧力発生。When the balance is lowered, the valves V1 to V3 are closed and the valve V4 is opened. Pressure is generated by lowering the cylinder 14.
【００１８】バランス下降時は、バルブＶ２〜Ｖ４は
閉、バルブＶ１を開とする。シリンダ１４が下降し油は
リザーバタンク１８へ。When the balance is lowered, the valves V2 to V4 are closed and the valve V1 is opened. The cylinder 14 descends and the oil goes to the reservoir tank 18.
【００１９】固定時は、バルブＶ１〜Ｖ４を閉とし、シ
リンダ１４をロックとする。When fixed, the valves V1 to V4 are closed and the cylinder 14 is locked.
【００２０】戻り時は、バルブＶ１、Ｖ３、Ｖ４を閉、
バルブＶ２を開とする。バネ１５によりシリンダ１４が
上昇、リザーバ１８から油供給。When returning, the valves V1, V3 and V4 are closed,
The valve V2 is opened. Cylinder 14 is raised by spring 15 and oil is supplied from reservoir 18.
【００２１】以上の作業シーケンスとバルブ開閉の対応
を表１に表示する。 表 １ 作業シーケンスとバルブ開閉の対応 バルブＮｏ． １ ２ ３ ４ 地切り 閉 閉 閉 開 シリンダ下降による圧力発生 揚重搬送 閉 閉 閉 閉 ロック バランス上昇 閉 閉 開 閉 アキュムレータによる供給でシリンダ上昇 バランス下降 閉 閉 閉 開 シリンダ下降による圧力発生 バランス下降 開 閉 閉 閉 シリンダ下降リザーバへ 固定 閉 閉 閉 閉 ロック 戻り 閉 閉 閉 閉 バネによるシリンダ上昇、リザーバから供 給Table 1 shows the correspondence between the above work sequence and valve opening / closing. Table 1 Correspondence between work sequence and valve opening / closing Valve No. 1 2 3 4 Ground cut Closed Closed Closed Open Pressure generation due to cylinder lowering Lifting conveyance Closed Closed Closed Lock Lock balance rise Closed Closed Open Close Cylinder rise due to accumulator supply Balance lowered Closed Closed Open Pressure generated due to cylinder fall Balance lowered Open Closed Closed Closed Cylinder down Fixed to reservoir Closed Closed Closed Closed Lock Return Closed Closed Closed Closed Cylinder lifted by spring, supplied from reservoir
【００２２】図９に本発明の第２実施例に係るバランサ
を示し、この実施例では第１ないし第６のチェックバル
ブがＶ１〜Ｖ６の６個用いられており、また圧力発生ジ
ャッキ１９が設けられている。作業シーケンスとバルブ
開閉の対応は次の様なものである。FIG. 9 shows a balancer according to a second embodiment of the present invention. In this embodiment, six first to sixth check valves V1 to V6 are used, and a pressure generating jack 19 is provided. Has been. The correspondence between the work sequence and valve opening / closing is as follows.
【００２３】地切り時は、ロードセル１３の荷重信号に
基づきバルブ制御装置１６によりバルブＶ２〜Ｖ５を
閉、バルブＶ１及びＶ６を開とする。シリンダ１４の下
降による圧力発生。At the time of ground cutting, the valves V2 to V5 are closed and the valves V1 and V6 are opened by the valve controller 16 based on the load signal of the load cell 13. Pressure is generated by lowering the cylinder 14.
【００２４】揚重搬送時は、バルブＶ１〜Ｖ６を閉と
し、シリンダ１４をロックする。At the time of lifting and conveying, the valves V1 to V6 are closed and the cylinder 14 is locked.
【００２５】バランス上昇時は、バルブＶ１、Ｖ２、Ｖ
４、Ｖ６を閉、バルブＶ３及びＶ５を開とする。アキュ
ムレータ１７による圧油供給でシリンダ１４が上昇。When the balance is raised, the valves V1, V2, V
4, V6 is closed and valves V3 and V5 are opened. The cylinder 14 is raised by the pressure oil supplied by the accumulator 17.
【００２６】バランサ下降は、バルブＶ２〜Ｖ５を閉、
バルブＶ１及びＶ６を開とする。シリンダ１４の下降に
よる圧力発生。To lower the balancer, close the valves V2 to V5,
The valves V1 and V6 are opened. Pressure is generated by lowering the cylinder 14.
【００２７】バランサ下降は、バルブＶ２、Ｖ３、Ｖ
５、Ｖ６を閉、バルブＶ１及びＶ４を開とする。シリン
ダ１４が下降し、油はリザーバタンク１８へ。The balancer descends by the valves V2, V3, V
5, V6 is closed and valves V1 and V4 are opened. The cylinder 14 descends and the oil goes to the reservoir tank 18.
【００２８】固定時は、バルブＶ１〜Ｖ６を閉とし、シ
リンダ１４をロックする。When fixed, the valves V1 to V6 are closed and the cylinder 14 is locked.
【００２９】戻り時は、バルブＶ１、Ｖ４、Ｖ５、Ｖ６
を閉、バルブＶ２及びＶ３を開とする。バネ１５により
シリンダ１４が上昇、リザーバタンク１８から油供給。When returning, the valves V1, V4, V5, V6
Is closed and valves V2 and V3 are opened. Cylinder 14 is raised by spring 15 and oil is supplied from reservoir tank 18.
【００３０】以上の作業シーケンスとバルブ開閉の対応
を表２に表示する。The correspondence between the above work sequence and valve opening / closing is shown in Table 2.
【００３１】 表 ２ 作業シーケンスとバルブ開閉の対応 バルブＮｏ． １ ２ ３ ４ ５ ６ 地切り 開 閉 閉 閉 閉 開 シリンダ下降による圧力発生 揚重搬送 閉 閉 閉 閉 閉 閉 ロック バランス上昇 閉 閉 開 閉 開 閉 アキュムレータによる供給でシリンダ 上昇 バランス下降 開 閉 閉 閉 閉 開 シリンダ下降による圧力発生 バランス下降 開 閉 閉 開 閉 閉 シリンダ下降リザーバへ 固定 閉 閉 閉 閉 閉 閉 ロック 戻り 閉 開 開 閉 閉 閉 バネによるシリンダ上昇、リザーバか ら供給Table 2 Correspondence between work sequence and valve opening / closing Valve No. 1 2 3 4 5 6 Ground cut Open Closed Closed Closed Closed Pressure generation due to cylinder lowering Lifting transfer Closed Closed Closed Closed Closed Lock balance increase Closed Closed Open Closed Open Cylinder raised by balance supplied Opened closed Closed Closed OPEN Cylinder down pressure generation Balance down OPEN CLOSE CLOSE CLOSE OPEN CLOSE CLOSE Cylinder DOWN Fixed to reservoir CLOSE CLOSE CLOSE CLOSE CLOSE CLOSE LOCK RETURN CLOSE OPEN OPEN CLOSE CLOSE CLOSE Cylinder rise by spring, supply from reservoir
【００３２】[0032]
【発明の効果】以上の通り本発明によれば、下記のすぐ
れた効果を奏する。 （ａ） 微少調整は勿論のこと、各種の作業シーケンス
を行うことができる。 （ｂ） アキュムレータの圧油でバランス作業を行うの
で、構造が簡単となり、他からのエネルギの供給が不要
である。 （ｃ） 複動油圧シリンダとアキュムレータとリザーバ
タンクとそれを接続する油路に設けたバルブとバルブ制
御装置で構成され単純な構造で、安全に各種の作業シー
ケンスを行うことができる。As described above, according to the present invention, the following excellent effects can be obtained. (A) It is possible to perform various work sequences as well as fine adjustment. (B) Since the balance work is performed with the pressure oil of the accumulator, the structure is simple and it is not necessary to supply energy from others. (C) With a simple structure composed of a double-acting hydraulic cylinder, an accumulator, a reservoir tank, a valve provided in an oil passage connecting them, and a valve control device, various work sequences can be safely performed.
【図１】本発明を実施したクレーンのフック装置の外観
正面図。FIG. 1 is an external front view of a crane hook device embodying the present invention.
【図２】図１のフック装置の側面図FIG. 2 is a side view of the hook device of FIG.
【図３】本発明を実施した他のクレーンのフック装置の
外観正面図。FIG. 3 is an external front view of a hook device of another crane embodying the present invention.
【図４】図３のフック装置の側面図。FIG. 4 is a side view of the hook device of FIG.
【図５】フック上昇の操作力を作用した状態を示す説明
図。FIG. 5 is an explanatory view showing a state in which an operating force for raising the hook is applied.
【図６】フック下降の操作力を作用した状態を示す説明
図。FIG. 6 is an explanatory view showing a state in which an operating force for lowering the hook is applied.
【図７】バランサの油圧回路図。FIG. 7 is a hydraulic circuit diagram of the balancer.
【図８】バランサの第１の実施例を示す油圧回路図。FIG. 8 is a hydraulic circuit diagram showing a first embodiment of the balancer.
【図９】バランサの第２実施例を示す油圧回路図。FIG. 9 is a hydraulic circuit diagram showing a second embodiment of the balancer.
【図１０】クレーンの外観図。FIG. 10 is an external view of a crane.
１０・・・フック １１・・・バランサ １２・・・ワイヤロープ １３・・・ロードセル １４・・・複動油圧シリンダ １５・・・バネ １６・・・バルブ制御装置 １７・・・アキュムレータ １８・・・リザーバタンク １９・・・圧力発生ジャッキ Ｖ・・・バルブ 10 ... Hook 11 ... Balancer 12 ... Wire rope 13 ... Load cell 14 ... Double-acting hydraulic cylinder 15 ... Spring 16 ... Valve control device 17 ... Accumulator 18 ... Reservoir tank 19 ... Pressure generating jack V ... Valve
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平５−163000（ＪＰ，Ａ) 特開 昭51−27262（ＪＰ，Ａ) 特開 平５−178598（ＪＰ，Ａ) 特開 平４−94400（ＪＰ，Ａ) 特開 昭62−201797（ＪＰ，Ａ) 実開 昭57−67076（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5-163000 (JP, A) JP-A-51-27262 (JP, A) JP-A-5-178598 (JP, A) JP-A-4- 94400 (JP, A) JP 62-201797 (JP, A) Actual development 57-67076 (JP, U)
Claims (1)
付けられたクレーンのフック装置において、ロードセル
を有する複動油圧シリンダを具備し、その複動油圧シリ
ンダに圧油を供給するアキュムレータと、その複動油圧
シリンダの圧油を受けるリザーバタンクと、複動油圧シ
リンダからリザーバタンクに至る油路に設けた第１のバ
ルブと、リザーバタンクから複動油圧シリンダに至る油
路に設けられた第２のバルブと、アキュムレータから複
動油圧シリンダに至る油路に設けた第３のバルブと、複
動油圧シリンダからアキュムレータに至る油路に設けた
第４のバルブとを備え、複動油圧シリンダにはバネが設
けられ、そしてロードセルからの荷重信号により第１な
いし第４のバルブを開閉するバルブ制御装置を備え、そ
のバルブ制御装置は地切り時は第１ないし第３のバルブ
を閉とし、第４のバルブを開とし、揚重搬送時はすべて
のバルブを閉とし、バランス上昇時は第３のバルブのみ
を開としてアキュムレータの圧油で複動油圧シリンダを
上昇させ、バランス下降時に第４のバルブのみを開とし
て複動油圧シリンダの下降による圧力を発生させ、また
第１のバルブのみを開とすると複動油圧シリンダが下降
して油はリザーバタンクに流れ、戻り時は第２のバルブ
のみを開としてバネ１５により複動油圧シリンダが上昇
してリザーバタンクから油が供給される機能を有するこ
とを特徴とするクレーンのフック装置。1. A hook device for a crane attached to a lower end of a hanging wire rope of a crane, comprising a double-acting hydraulic cylinder having a load cell, and accumulator supplying pressure oil to the double-acting hydraulic cylinder; A reservoir tank for receiving pressure oil of the hydraulic cylinder, a first valve provided in an oil passage from the double-acting hydraulic cylinder to the reservoir tank, and a second valve provided in an oil passage from the reservoir tank to the double-acting hydraulic cylinder. And a third valve provided in an oil passage extending from the accumulator to the double-acting hydraulic cylinder, and a fourth valve provided in an oil passage extending from the double-acting hydraulic cylinder to the accumulator. And a valve controller for opening and closing the first to fourth valves according to a load signal from the load cell. The first to third valves are closed at the time of ground cutting, the fourth valve is opened, all the valves are closed at the time of lifting and conveying, and only the third valve is opened at the time of balance increase and the accumulator pressure is increased. Oil raises the double-acting hydraulic cylinder, and when the balance is lowered, only the fourth valve is opened to generate pressure due to the lowering of the double-acting hydraulic cylinder, and when only the first valve is opened, the double-acting hydraulic cylinder is lowered. Oil flows to the reservoir tank, and when returning, only the second valve is opened to raise the double-acting hydraulic cylinder by the spring 15 so that the oil is supplied from the reservoir tank. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5188045A JP2690051B2 (en) | 1993-07-29 | 1993-07-29 | Crane hook device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5188045A JP2690051B2 (en) | 1993-07-29 | 1993-07-29 | Crane hook device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0741280A JPH0741280A (en) | 1995-02-10 |
| JP2690051B2 true JP2690051B2 (en) | 1997-12-10 |
Family
ID=16216723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5188045A Expired - Lifetime JP2690051B2 (en) | 1993-07-29 | 1993-07-29 | Crane hook device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2690051B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200447824Y1 (en) * | 2007-12-24 | 2010-02-23 | 현대제철 주식회사 | Transfer device of H shape steel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5127262A (en) * | 1974-08-30 | 1976-03-06 | Tsuneo Yoshioka | SOKUDOCHOSEISOCHI |
| JPS5767076U (en) * | 1980-10-03 | 1982-04-22 | ||
| JPH07115840B2 (en) * | 1991-12-18 | 1995-12-13 | 三井造船株式会社 | Hydraulic load balancer |
-
1993
- 1993-07-29 JP JP5188045A patent/JP2690051B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0741280A (en) | 1995-02-10 |
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