JP2003306291A - Engagement implement for lifting heavy object such as steel plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an implement for engaging the hook of a crane with a heavy object such as a steel plate when the object is lifted by the crane allowing the engagement operation between the hook and the steel plate to be easily performed, the heavy object to be safely lifted at all times, and the engagement of a plurality of hooks with the heavy object to be easily performed by a single worker. <P>SOLUTION: A frame 1 is suspended from the wire rope 4 of the crane, and the hook 10 is suspended from the frame through an extension wire rope 8. A rope winder 12 is installed on the frame, and the hook 10 is connected to an auxiliary rope 14 installed in the rope winder. Thus, the auxiliary rope can be pulled by the rope winder with a tension slightly higher than the weight of the hook. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool for engaging a hook when a heavy object such as a steel plate is lifted by a crane.

[0002]

2. Description of the Related Art When a heavy object such as a plurality of steel plates is lifted by a crane, an operator on the ground engages a hook with the heavy object (referred to as "sliding operation").
However, when there are multiple hooks and it is necessary to engage the hooks at the four corners of a heavy object, for example, and to lift the heavy object in a well-balanced manner, multiple hooks should be engaged at the same time. It was sometimes difficult.
In such a case, if there is a non-engagement of hooks or hooks that are not engaged, the balance may be lost during lifting.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention is intended to provide a heavy-weight lifting engagement tool that allows a single operator to easily engage with a plurality of hooks and always lift a heavy load safely. To do.

[0004]

For this purpose, a heavy-weight lifting engaging tool such as a steel plate according to the present invention suspends a frame on a wire rope of a crane and further suspends a hook on the frame by an extension rope. In addition, the frame and the hook are connected to each other via an auxiliary rope, and the auxiliary rope pulls the hook upward by a pulling force slightly stronger than the weight of the hook.
Further, the present invention is characterized in that, in the above-described heavy-weight lifting engagement tool, the frame is provided with a rope winder for pulling the auxiliary rope by a tensile force slightly stronger than the weight of the hook.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view showing an engaging tool for lifting a heavy object according to the present invention. In the figure, reference numeral 1 denotes a pair of projecting pieces 2 welded to each other at appropriate intervals on the upper surface thereof by engaging a shackle 3 respectively, and a wire rope 4 of a crane (not shown) is passed through the shackle 3 so as to be always horizontal. It is a frame made of straight I-shaped steel that can be lifted while maintaining the state. Hook-shaped engaging pieces 5 are welded to both sides of the frame near both ends, and ring fittings 6 are engaged with the respective hook-shaped engaging pieces, and an extension rope 8 is hung on the ring fittings via a shackle 7. Then, hooks 10 are attached to the lower ends of the extension ropes via shackles 9.
Is hanging. Further, the adjacent hooks 10 are connected by the tension rod 11.

Reference numeral 12 is a rope winder in which a pair of flat bars 13 are welded to each other at appropriate intervals in the middle of the frame 1 and are suspended from the ends of the flat bars, and 14 is the rope winder. With the auxiliary rope extended from the above, the tip end of the auxiliary rope is fixed to the stop piece 15 fixed to the tension rod 11 via the shackle 16. In the rope winder, the winding reel inside is biased in the rope winding direction by the mainspring, and the auxiliary rope 14 is pulled a little stronger than the weight of the hook 10 (including the weight of the tension rod 11). It is pulled up by force.

Therefore, the tension rod 11 is pushed down by the pulling force by hand, the hook 10 is engaged with the outer edge of the heavy object 17 such as a steel plate, and when the hand is released, the pulling force causes the hook 10 to be in the engaged state. If all four hooks are engaged with the heavy object 17 as shown in FIG. 3 and then the wire rope 4 of the crane is towed to lift the frame 1, the weight of the extension rope 8 will be reduced. The loaded heavy object 17 can be lifted.

As described above, the hook 10 is the rope winder 1
Since it is always pulled upward by the action of 2, the ground worker can securely engage the hook 10 with the four corners of the steel plate or the like without disengagement from the heavy object 17 even if the operator releases the hook 10 from his hand. Therefore, the steel plate or the like can be safely lifted while maintaining the horizontal state. Further, since the auxiliary rope 14 can be prevented from being always slackened by providing the rope winder 12, there is no possibility that the auxiliary rope 14 may be entangled with other machine parts such as in a factory and lead to an accident. In addition, in this embodiment, the rope such as the wire rope and the extension rope has been described, but it goes without saying that a cable, a chain, a rod, or the like can be used instead. In addition to the rope winder 12, a coil spring or the like may be used as a means for pulling the auxiliary rope 14.

[0009]

As described above, according to the engagement tool for lifting a heavy object such as a steel plate according to the present invention, the hook and the heavy object such as a steel plate can be easily engaged with each other, and there is no risk of disengagement. It has the beneficial effect of ensuring that objects can always be safely lifted.

[Brief description of drawings]

FIG. 1 is a perspective view of an engagement tool for lifting a heavy object such as a steel plate according to an embodiment of the present invention.

FIG. 2 is a side view of an engaging tool for lifting a heavy object such as a steel plate according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a usage state of an engagement tool for lifting a heavy object such as a steel plate according to the embodiment of the present invention.

[Explanation of symbols]

1 frame 4 wire rope 8 extension rope 10 hooks 12 Rope winder 14 Auxiliary rope

Claims (2)

[Claims] 1. A frame is suspended from a wire rope of a crane, a hook is further suspended from the frame by an extension rope, and the frame and the hook are connected to each other via an auxiliary rope, and the hook is suspended by the auxiliary rope. A hook for lifting heavy objects such as a steel plate, wherein the hook is pulled upward by a pulling force slightly stronger than the weight of the hook. 2. An engagement tool for lifting a heavy object such as a steel plate according to claim 1, wherein the frame is provided with a rope winder for pulling the auxiliary rope by a tensile force slightly stronger than the weight of the hook. .