JPH11173321A - Remote hook opening and closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform opening and closing operation remotely without needing the direct manual work of a worker. SOLUTION: A dislocation preventing jig 21 to prevent a fall of a suspending cargo comprises an energizing member 32 energized in a hook closing direction; a pull string 3 pulled out from the dislocation preventing jig 21 and moving the dislocation preventing jig 21 through opening and closing of the hook 2; a stopper member 31 arranged in the middle of the pull string 3; a cylinder body 4 to slidably contain the stopper member 31; a stopper lock member 41 disposed in the middle of the interior of the cylinder body 4 and in a position wherein the stopper member 31 is locked when the pull string 3 is pulled until the hook 2 is released; and a reaction force member 42 arranged in the cylinder body 4 located closer to the pulling direction side of the pull string 3 than the stopper lock member 41 and applying a reaction force in a direction in which the stopper member 31 is separated away from the stopper lock member 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a device for remotely opening and closing a hook.

[0002]

2. Description of the Related Art A hook provided on a crane, a chain block, or a supporting steel is provided with an open portion of the hook so that the hook is disengaged when the load is lifted or supported and the attached load is not dropped. There is provided a jig for closing off. Therefore, when a hanging load is attached to or detached from the hook, an operator manually opens and closes the hook releasing jig directly by hand.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and a hook remote opening / closing device which can be opened / closed remotely without requiring direct manual operation by an operator. Is to provide.

[0004]

SUMMARY OF THE INVENTION According to the present invention, there is provided an urging member for urging a hanging load in a hook closing direction for preventing a suspended load from falling off, and pulling out and pulling the urging member from the jig. A pull string for moving the stopper jig to open and close the hook, a stopper member provided on the way of the draw string, a tubular body for slidably housing the stopper member, and a way in the tubular body. A stopper locking member disposed at a position where the stopper member can be locked when the pull cord is pulled until the hook is released, and a stopper within the cylinder, which is located on the pulling direction side of the pull cord from the stopper locking member. A hook remote opening / closing device, characterized by comprising a reaction force member that applies a reaction force in a direction of detaching the stopper member from the stopper locking member by further pulling the drawstring. Further, the present invention is the hook remote opening / closing apparatus, characterized in that the telescopic section is provided between the stopper member and the stopper member in the middle of the drawstring. Further, according to the present invention, in the above-described hook remote opening / closing device, the elastic portion fixes both ends of the portion where the drawstring is slackened to a spring member arranged along the slackened portion, and extends the drawstring by a predetermined length. A hook remote opening and closing device characterized in that it is configured to allow the hook to be opened.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hook remote opening and closing device according to the present invention will be described below with reference to the drawings.

<A> Overall Configuration As shown in FIG. 1, a hook remote opening / closing apparatus 1 comprises a stopper jig 21 for closing an opening of a hook 2 and a pull cord 3 pulled out from the stopper jig 21. , And a cylindrical body 4 through which the drawstring 3 is inserted.

<B> Hook The hook 2 is a well-known hook and has, for example, a substantially J-shape, and has a stopper jig 21 for opening and closing its opening. The release stopper jig 21 is a biasing member 2 that biases the opening of the hook 2 to be always in a closed state.
2 are provided. As the urging member 22, any known spring material can be used as long as it has an urging force, such as a coil spring or a leaf spring.

<C> Pull String The pull string 3 is a member having one end connected to the stopper jig 21 and opening and closing the opening of the hook 2 by operating the stopper jig 21. More specifically, one end of the drawstring 3 is connected to a stopper jig 21, and a tubular body 4, which will be described later, is inserted through a hook 2 by a known means such as a pulley. The jig 21 is moved by pulling. A stopper member 31 is provided on the way of the drawstring 3. Stopper member 31
Is a member accommodated in the cylindrical body 4 described later.

<D> Cylindrical Body The cylindrical body 4 is a member provided near the lower end of the hook 2, and is a member through which the drawstring 3 described above is inserted and the stopper member 31 is housed. The cylinder 4 has an inner diameter that allows the stopper member 31 to slide freely. The tubular body 4 includes a stopper locking member 41 and a reaction force member 42 described below.

Stopper Locking Member The stopper locking member 41 is a member provided on the inner peripheral surface of the cylindrical body 4 for locking the stopper member 31 provided on the way of the drawstring 3. That is, the stopper locking member 41 is disposed at a position where the stopper member 31 is locked when the pull cord 3 is pulled until the hook stop jig 21 moves until the hook 2 is released. A known member for locking the stopper member 31 can be adopted as the stopper locking member 41 which locks and fixes the detachment preventing jig 21 so that the hook 2 is opened. It is conceivable that the stopper member 31 is locked by the spring pressure of the spring plate by adopting an arc-shaped leaf spring or the like as shown in FIGS. Stopper locking member 4
1 needs to have a supporting force enough to oppose the urging force of the urging member 22 provided on the jig 21 for preventing the hook 2 from returning the stopper member 31 via the drawstring 3.

The reaction force member 42 is a member for applying a reaction force in the direction of releasing the stopper member 31 locked by the stopper locking member 41, and is a stopper locking member inside the cylinder 4. 41 is a member arranged near the pull string 3 in the pulling direction side near 41. More specifically, when the stopper member 31 is released from the stopper locking member 41, the pull cord 3 is further pulled to press the stopper member 31 against the reaction member 42, and to reduce the reaction force of the reaction member 42 to the stopper member 31. By using this reaction force, the stopper member 31 is released from being locked by the stopper locking member 41 using this reaction force. As the reaction force member 42, the stopper member 31
A well-known spring material for applying a reaction force can be employed. For example, as shown in FIG. 1 and FIG. It is conceivable to arrange them.

[0012]

An example of a method of remotely opening and closing a hook using the hook remote opening and closing apparatus of the present invention will be described below.

<A> Remote Hook Opening Step (FIGS. 1 and 2) In order to open the hook 2 in the closed state by remote control, first, a pull cord 3 having one end connected to the hook 2 is arranged.
Pull. The pulling jig 21 is moved by pulling the drawstring 3, and the hook 2 is gradually opened. By pulling the drawstring 3, the stopper member 31 disposed on the way of the drawstring 3 descends in the cylindrical body 4 and is locked by the stopper locking member 41. Thus, the pull cord 3 is fixed at a position where the pull cord 3 is pulled to a predetermined position, and the jig 21 of the hook 2 moved together with the pull cord 3 can be maintained in the open state.

<B> Remote hook closing step (FIGS. 1 and 2) The hook 2 in the open state is closed by remote control.
First, the pull cord 3 in a state where the stopper member 31 is locked is further pulled. Thereby, the stopper member 31 is caused to interfere with the reaction member 42, and the reaction force generated in the reaction member 42 is transmitted to the stopper member 31. The stopper member 31
The stopper member 41 is released by the reaction force received from the reaction member 42. Thereby, the stopper jig 21 is moved to a position where the hook 2 is closed by the urging force from the urging member 22. When the pull cord 3 is further pulled, the jig 21 for preventing the hook 2 from coming off can be fixed at a position where the hook 2 does not come into contact with the hook 2 when the hook 2 is opened. Member 3
It is conceivable to secure as a pulling distance of the drawstring 3 for obtaining a reaction force for releasing the pull cord 1.

[0015]

[Embodiment 2] The hook remote opening / closing device described in Embodiment 1 of the present invention returns a hook from a state in which the jig for fixing the hook is fixed at the open position of the hook to the closed position of the hook. Further pull the pull string that was pulled when opening the. At this time, in the first embodiment of the invention,
An example is described in which the hook release stopper jig is moved in advance so as not to contact the hook in order to further pull the pull cord, and the pull cord can be pulled by the moving distance until the hook comes into contact with the hook. On the other hand, in the present embodiment, as shown in FIG. 3, the slip-off preventing jig 22 is It is conceivable that the drawstring 3 can be pulled even from the state in which it comes into contact with the hook 2. As shown in FIG. 3, the elastic member 5 includes, for example, a known elastic spring 51 such as a coil spring disposed on the way of the drawstring 3, and loosens the drawstring 3 between the elastic springs 51 so as to leave a predetermined length. A slack portion 32 is formed, and the drawstring 3 is fixed to both ends of a telescopic spring 51 disposed along the slack portion. As a result, when the pull cord 3 is further pulled, the elastic spring 51 of the expandable member 5 is stretched by being pulled by the slack of the pull string 3, and a reaction force enough to release the stopper member 31 from the stopper locking member 41. It can be obtained from the reaction force member 42.

[0016]

As described above, the present invention has the following effects. <a> When installing or removing a suspended load, the worker does not need to directly open and close the hook at all, and can remotely control the opening and closing of the hook, which is very safe. <B> The hook can be opened and closed safely and easily even in dangerous places such as high places. <C> Since the hook can be opened and closed even in a place where a worker cannot reach, the workability of any work using the hook is improved. <D> As described above, it is possible to reduce the number of workers. <E> It is extremely versatile, as it can be used for cranes, chain blocks, and supporting steel.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a state in which a hook is opened according to the present invention.

FIG. 2 is an explanatory view of a state in which a hook is closed according to the present invention.

FIG. 3 is an explanatory diagram of a hook remote opening / closing device according to a second embodiment of the invention;

FIG. 4 is an explanatory view of a telescopic member according to Embodiment 2 of the present invention.

Claims (3)

[Claims] An urging member for urging a hanging load in a hook closing direction for preventing a suspended load from falling off, and a pulling-out jig is pulled out from the jig and pulled to move the jig. A drawstring for opening and closing the hook; a stopper member provided on the way of the drawstring; a tubular body for slidably housing the stopper member; and a hook on the way on the way in the tubular body to open the drawstring. A stopper locking member disposed at a position where the stopper member can be locked when pulled down, and further disposed within the cylindrical body on the pulling direction side of the pulling string from the stopper locking member, and A hook remote opening / closing device, comprising: a reaction member that applies a reaction force in a direction of detaching the stopper member from the stopper locking member by pulling the hook member. 2. The remote hook opening / closing device according to claim 1, further comprising a telescopic portion provided between the stopper member and the stopper member on the way of the drawstring. 3. The hook remote opening / closing device according to claim 2, wherein the expansion and contraction portion includes both ends of a portion where the drawstring is slackened.
A hook remote opening / closing device, which is fixed to a spring member arranged along a slackened portion and is configured to allow extension of a drawstring by a predetermined length.