JP2007153583A - Hook device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safe hook device superior in operability capable of surely holding a hook member in a closing position. <P>SOLUTION: This hook device 10 has a hoisting accessory body 12, a hook member 21, a stopper member 40, a tension spring 50, a first operation member 31 and a second operation member 61. The hook member 21 is rotatable over the closed position and an open position relative to the hoisting accessory body 12. The stopper member 40 is rotatably arranged in an extension part 20 of the hoisting accessory body 12. A first stopper part 45 of the stopper member 40 is opposed to a first receiving part 25 of the hook member 21 when this stopper member 40 exists in a lock position, and prevents the hook member 21 from moving in the opening position direction. A second stopper part 46 of the stopper member 40 holds the hook member 21 in the opening position by engaging with a second receiving part 26 of the hook member 21 in a state of moving the hook member 21 to the opening position. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hook device used when, for example, a workpiece or the like is suspended by a crane.

When a workpiece is suspended by a crane, an operation (so-called slinging operation) is performed in which a rope-side element on the workpiece side is hooked on a hook device. After the sling work, the work is lifted to a desired height by a crane, and a predetermined work is performed. In this case, it is very important that the rope does not come off the hook device even if the rope is loosened. For this reason, various disconnection preventing means are also provided in the conventional hook device. (For example, see Patent Documents 1 and 2 below)
JP-A-8-301571 JP-A-10-310360

  In the hook device (ball removal hook) of Patent Document 1, the lock member rotates in the open position direction when the pulling rope is pulled, and the suspension opening claw provided on the lock member pays out the rope. By moving, the rope is detached from the hook member. In the case of this conventional apparatus, there is a concern that the rope may come off the hook member if the pulling rope is accidentally pulled while the rope is slack during the work other than the ball removal.

  The hook device of Patent Document 2 includes a hook support, a hook body rotatably provided on the hook support, and a lock device that holds the hook body in a closed position, and the workpiece is moved to a predetermined position. After lifting, move the lock device in the unlocking direction with the first operation rope, and pull the second operation rope to move the hook body in the open position direction, so that the deballing operation can be remotely operated Has been.

  In the hook device disclosed in Patent Document 2, when the first operation rope and the second operation rope are loosened after the ball removal work is finished, the hook body returns to the closed position by the weight of the hook body, and the lock device is activated. The hook body is held in the closed position. For this reason, the worker needs to manually release the locked state and move the hook body in the opening direction when performing the staking operation of the next workpiece, but the hook member is heavy and requires labor, It is also conceivable to pinch fingers when operating the hook member.

  Accordingly, an object of the present invention is to provide a hook device that is safe and has good workability such that the hook member can be securely held in the closed position and the hook member can be held in the open position as required. .

  The hook device of the present invention includes a suspension body having an extending portion extending downward in a state suspended from a crane, a hook member provided on the suspension body and rotatable between a closed position and an open position, A first operating member connected to the hook member and moving the hook member to the open position; and a stopper member provided rotatably on the extending portion of the suspension body. The stopper member rotates between a lock position for holding the hook member in the closed position and a lock release position for moving the hook member in the open position direction, and the first receiving of the hook member in the lock position. The hook member is prevented from moving in the opening position direction by the first stopper portion being opposed to the portion, and the second stopper portion is disposed on the second receiving portion of the hook member in the state of being moved to the unlocking position. Is engaged to hold the hook member in the open position. Furthermore, the hook device of the present invention includes a biasing means such as a tension spring that biases the stopper member toward the lock position, and a second member that is connected to the stopper member and moves the stopper member to the lock release position. An operation member is provided.

In a preferred embodiment of the present invention, the extension portion of the hanging tool main body is provided with a hook restricting portion with which the tip of the hook member can abut when the hook member is in the closed position.
An example of the second stopper portion of the stopper member is a convex portion that can be engaged with and disengaged from the second receiving portion of the hook member when the hook member is moved to the open position.
Moreover, with the preferable form of this invention, the pin which hooks the hoist hook of the said crane is provided in the upper part of the said hanging tool main body.

  According to the present invention, when the hook member is in the closed position, the hook member is held in the closed position by the first stopper portion of the stopper member facing the first receiving portion of the hook member. In order to move the hook member to the open position, the second operating member is pulled to move the stopper member to the unlocked position, and in this state, the first operating member is pulled to move the hook member to the open position. . That is, if only one of the first and second operation members is pulled, the hook member does not move to the open position, and only when these operation members are pulled in a predetermined order, the hook member moves to the open position. Therefore, it is possible to prevent the hook member from moving to the open position due to an erroneous operation.

  When the second operating member is loosened in a state where the hook member is moved to the open position, the second stopper portion of the stopper member abuts against the second receiving portion of the hook member by the biasing means, so that the hook member is Since it is held in the open position, the hook member can be held in the open position as necessary.

An embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 shows a hook device 10 according to the present invention. This hook device 10 has a hanger body 12 hung on a hoist hook 11 on the crane side. For example, as shown in FIG. 2, the hanger body 12 is formed by connecting two plates 12 a and 12 b with an upper pin 15 and a lower pin 16, and the hoist hook 11 is hung on the upper pin 15. It can be done.

  An extension portion 20 that functions as a detachment prevention portion of the suspension base 19 a such as the rope 19 is formed in the lower portion of the suspension body 12. As shown in FIG. 1, in a state where the hanging tool body 12 is suspended from the hoist hook 11, the extending portion 20 protrudes obliquely downward from the vicinity of the lower pin 16.

  A hook member 21 is rotatably provided on the extending portion 20 of the hanging tool body 12. As shown in FIG. 2, the hook member 21 is disposed between the plates 12a and 12b constituting the hanger body 12, and the closed position shown in FIG. 1 and FIG. It can be rotated over the open position shown in FIG. The pin 16 functions as a first shaft for rotatably supporting the hook member 21.

  The hook portion 21a formed on the lower side of the hook member 21 can be passed through a loop-shaped suspension base (suspending band) 19a of the rope 19 on the workpiece (not shown) side to be suspended. A first receiving portion 25 that engages with a stopper member 40 described later and a protruding second receiving portion 26 are formed on the upper portion of the hook member 21. A hook restricting portion 27 with which the tip of the hook portion 21a can come into contact with the hook member 21 when the hook member 21 is in the closed position is provided at the lower portion of the hanging tool body 12.

  A first operation member 31 is connected to the upper end portion 30 of the hook member 21. The first operating member 31 is made of a material having a tensile strength such as a rope or a string, for example, and hangs down outside the second shaft 41 described below. The operation member 31 has a length that allows a worker's hand below to reach the hook device 10 even when the hook device 10 is lifted by a crane. The operator pulls the hook member 21 by the hand. It can be moved from the closed position to the open position.

  A stopper member 40 is attached to the extending portion 20 of the hanging tool body 12. The stopper member 40 has a lock position shown in FIG. 1, that is, a position where the hook member 21 is held in a closed position, and a lock release position shown in FIG. The hook member 21 is rotatably supported over a position that allows the hook member 21 to move in the open position direction. A first stopper portion 45 is formed on the stopper member 40. A second stopper portion 46 that is convex in the lateral direction is formed in the middle portion of the stopper member 40 in the vertical direction. The 2nd stopper part 46 is a convex part which can be engaged / disengaged with the 2nd receiving part 26 of the hook member 21 in the state which the stopper member 40 moved to the said lock release position.

  As shown in FIG. 1, when the hook member 21 is in the closed position and the stopper member 40 is in the locked position, the first stopper portion 45 of the stopper member 40 contacts the first receiving portion 25 of the hook member 21. By being opposed to each other, the hook member 21 is prevented from moving in the open position direction, and the hook member 21 is held in the closed position. As shown in FIG. 3, when the stopper member 40 moves to the unlocking position, the first stopper portion 45 of the stopper member 40 does not face the first receiving portion 25 of the hook member 21, so that the hook member 21 is opened. It is allowed to move in the direction.

  With the hook member 21 moved to the open position as shown in FIG. 4, the second stopper portion 46 of the stopper member 40 is engaged with the second receiving portion 26 of the hook member 21 as shown in FIG. By doing so, the hook member 21 is held in the open position.

  The stopper member 40 is urged toward the lock position by a tension spring 50 which is an example of an urging means. One end of the tension spring 50 is locked to the spring hooking portion 52 of the hanger body 12, and the other end of the tension spring 50 is connected to the spring hooking portion 54 of the stopper member 40 in a state where tension is applied.

  A second operation member 61 is connected to the arm portion 60 of the stopper member 40. The second operation member 61 is for an operator to move the stopper member 40 from the lock position to the lock release position. The operation member 61 is made of a material having a tensile strength, such as a rope or a string, and has a length that allows the operator's hand below to reach the hook device 10 even when the hook device 10 is lifted by a crane. ing.

Next, the operation of the hook device 10 will be described.
As shown in FIG. 1, in a state where the hook member 21 is in the closed position and the stopper member 40 is held in the locked position by the elasticity of the tension spring 50, the first stopper portion 45 of the stopper member 40 is the first stopper portion 45 of the hook member 21. The hook member 21 is prevented from moving in the open position direction because it faces the one receiving portion 25.

  When the hook member 21 is in the closed position, the hook portion 21a of the hook member 21 is closed by the extending portion 20 of the hanging tool body 12, so that the hanging base 19a may come off from the hook portion 21a even if the rope 19 is loosened. It is surely prevented.

  When the hoist hook 11 is lifted by the crane, the hook device 10 and the rope 19 are raised, and the work is raised to a predetermined height. In this state, a predetermined work is performed on the work. At this time, even if the rope 19 hung on the hook member 21 is loosened, the extending portion 20 prevents the suspending base 19a of the rope 19 from being detached from the hook portion 21a.

  To remove the rope 19 from the hook device 10 by remote operation after the work is finished, as shown in FIG. 3, the stopper member 40 is moved in the arrow B direction by pulling the second operation member 61 in the arrow A direction. The lock on the hook member 21 is released. Furthermore, the hook member 21 is moved to the open position by pulling the first operation member 31 in the arrow C direction while the second operation member 61 is pulled in the arrow A direction as shown in FIG.

  By doing so, the hook member 21 is pivoted and lifted, and the hook portion 21a that has been closed by the extending portion 20 until then is released, whereby the suspension base 19a of the rope 19 is detached from the hook portion 21a. When the second operating member 61 is loosened when the hook member 21 is in the open position, the stopper member 40 is rotated in the direction indicated by the arrow D in FIG. As the portion 46 is hooked on the second receiving portion 26 of the hook member 21, the hook member 21 is held in the open position.

  If the first operation member 31 is loosened while the second operation member 61 is pulled, the hook member 21 returns to the closed position by its own weight. As described above, the hook member 21 can be held in the open position as necessary, or the hook member 21 can be returned to the closed position as necessary, and then the next operation can be started.

  In carrying out the present invention, it goes without saying that the hook body, the stopper member, the biasing means, etc. can be appropriately changed without departing from the gist of the present invention.

The front view of the hook device concerning one embodiment of the present invention. The side view of the hook apparatus shown by FIG. The front view of the state which the stopper member of the hook apparatus shown by FIG. 1 moved to the lock release position. The front view of the state which the hook member of the hook apparatus shown by FIG. 1 moved to the open position. The front view of the state by which the hook member of the hook apparatus shown by FIG. 1 was hold | maintained in the open position by the stopper member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Hook apparatus 12 ... Suspension tool main body 20 ... Extension part 21 ... Hook member 25 ... 1st receiving part 26 ... 2nd receiving part 31 ... 1st operation member 40 ... Stopper member 45 ... 1st stopper part 46 ... Second stopper part 50 ... Tension spring (biasing means)
61. Second operation member

Claims (5)

A suspension body having an extending portion extending downward in a state suspended from a crane;
A hook member provided on the hanger main body and rotatable between a closed position and an open position;
A first operating member connected to the hook member and moving the hook member to the open position;
The extension part of the lifting device main body is rotatably provided, and rotates between a lock position for holding the hook member in the closed position and a lock release position for moving the hook member in the open position direction, When the first stopper portion faces the first receiving portion of the hook member in the locked position, the hook member is prevented from moving in the open position direction, and the hook is moved in the unlocked position. A stopper member that holds the hook member in the open position by engaging a second stopper portion with a second receiving portion of the member;
Biasing means for biasing the stopper member toward the lock position;
A second operating member connected to the stopper member and moving the stopper member to the unlock position;
A hook device comprising:   The biasing means is a tension spring, and one end of the tension spring is connected to the suspension body, and the other end of the tension spring is connected to the stopper member in a state where tension is applied. Item 2. The hook device according to Item 1.   The hook extension part which can contact | abut the front-end | tip of this hook member when the said hook member exists in the said closed position is provided in the said extension part of the said hanging tool main body. The hook device described.   The said 2nd stopper part of the said stopper member is a convex part which can be engaged / disengaged with the said 2nd receiving part of this hook member in the state which the said hook member moved to the said open position. 4. The hook device according to any one of items 3 to 3.   The hook device according to any one of claims 1 to 4, wherein a pin for hooking a hoist hook of the crane is provided on an upper portion of the suspension tool main body.

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