JPH0138149Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a crane hook device, and particularly to a crane hook device having a unique rope attachment structure.

[Conventional technology]

Generally, when lifting work is performed using a crane, the object to be lifted is lifted by a crane hook device attached to the tip of a wire rope of the crane device. Conventionally, this type of device was
As described in Publication No. 25-3859, the structure of a hook device is disclosed in which a hole is made in a balancing groove wheel for inserting a cotter, a rope is inserted into each hole, the cotter is inserted, and the rope is fixed. has been done. That is, the rope is fixed to the balancing groove wheel by inserting the rope into the hole and inserting the rope starter.

In addition, the device disclosed in Japanese Utility Model Publication No. 14595/1986 has a hook block pulley of a crane in the shape of a drum, and a wedge that fixes the end of the wire rope to the left-right symmetrical part inside both flanges of a grooved or smooth winding drum. After the wire rope is inserted into the hole, the wire rope is fixed by driving a wedge into the hole.

[Problem that the invention attempts to solve]

However, in the hook device described in Japanese Utility Model Publication No. 25-3859, the rope is bent sharply and inserted into the hole, so bending stress is generated in the sharply bent rope, making it difficult to lift heavy objects. The disadvantage is that the rope is easily damaged in some cases. Also, in the device disclosed in Utility Model Publication No. 46-14595,
Since the wire rope is fixed by sharply bending it,
There is a problem that breakage easily occurs.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hook device for a crane that can fix a wire rope to a drum without sharply bending the rope.

[Means for solving problems]

In order to achieve the above object, the present invention horizontally supports a balance drum on a hanging metal fitting with a hook, fixes a rope fixing socket having a pin hole at the tip of each of two lifting ropes, and Rope fixing sockets are fixed to both end surfaces of the balance drum with pins, and the two lifting ropes are connected to arcuate guides provided on both cross sections from the fixed positions on both end surfaces of the balance drum. It is characterized in that it is guided onto the circumferential surface of the balance drum via a member and wound in opposite rotational directions toward the center of the balance drum.

[Effect]

According to the present invention, a balance drum is horizontally supported on a hanging metal fitting with a hook, a rope fixing socket having a pin hole is fixed to the tip of each of two lifting ropes, and the rope fixing socket is The tips are fixed to both end surfaces of the balance drum using pins. The two lifting ropes are guided from fixed positions on both end surfaces of the balance drum onto the circumferential surface of the balance drum via arcuate guide members provided on both end surfaces. Therefore, the rope can be fixed to the balance drum without sharply bending, so no bending stress is generated in the rope. Furthermore, since the lifting rope is fixed to the balance drum with a socket and pin, the rope will not be damaged. This improves the durability of the rope and prevents the rope from breaking during lifting operations.

〔Example〕

Hereinafter, preferred embodiments of the crane hook device according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a side view of a crane hook device according to the present invention, and FIG. 2 shows a front view.

The crane hook device shown in FIG. 1 mainly includes two lifting ropes 1, 1, a balance drum 2, a hanging fitting 5 with a hook, and a shaft 6. As shown in FIG. 2, a shaft 6 is horizontally supported on the hanging fitting 5 with a hook, and a balance drum 2 is fixed to the shaft 6 so as to be rotatable together with the shaft 6.

FIG. 3 is a side view of the balance drum 2, showing a portion where the lifting ropes 1, 1 are fixed to the balance drum 2. As shown in FIG. 2, the outer periphery of the balance drum 2 is provided with a flange 2A that prevents the lifting rope 1 from slipping off the drum circumferential surface. A notch 2B is formed in. Furthermore, arcuate guide members 2C are provided on both end surfaces of the balance drum 2 and continue from the notch 2B.

A rope fixing socket 3 having a pin hole is fixed to the end of the lifting rope 1, and the lifting rope 1 is fixed to the end face of the balance drum 2 by a pin 4 via the rope fixing socket 3. . The two lifting ropes 1, 1 are passed from both end surfaces of the balance drum 2 through the arc-shaped guide member 2C and the notch 2B of the flange 24.
They are each guided onto the circumferential surface of the balance drum 2 and wound in opposite rotational directions toward the center of the balance drum 2.

The operation of the crane hook device according to the present invention constructed as described above is as follows. The imbalance in length that occurs in the lifting ropes 1, 1 during lifting work is absorbed by the rotation of the balance drum 2, and a substantially equal load acts on the lifting ropes 1, 1. Furthermore, the lifting rope 1 is fixed to the balance drum 2 by the rope fixing socket 3 and the pin 4, and the lifting rope 1 is guided from this fixed part along the arc-shaped guide member 2C, and the lifting rope 1 is guided along the arc-shaped guide member 2C. It is led from the notch 2B to the circumferential surface of the balance drum 2. For this reason,
Since the rope 1 is not bent suddenly when fixing the rope 1 to the balance drum 2, bending stress is not generated in the fixed portion of the rope 1, and the rope 1 is not damaged. This increases the durability of the rope 1 and allows safe lifting work.

In addition, the length imbalance that occurs in the two lifting ropes 1, 1 can be dealt with by increasing or decreasing the width of the balance drum 2 and increasing or decreasing the number of turns of the lifting ropes 1, 1. can do.

[Effect of idea]

As explained above, according to the crane hook device according to the present invention, the lifting rope can be fixed to the balance drum without suddenly bending, and
Since the rope fixing socket fixed to the tip of the lifting rope is fixed with a pin, the rope will not be damaged. This improves the durability of the lifting rope and prevents the lifting rope from breaking during lifting work.

[Brief explanation of the drawing]

FIG. 1 is a side view of a crane hook device according to the present invention, FIG. 2 is a front view of the crane hook device of FIG. 1, and FIG. 3 is a side view of a balance drum. 1... Lifting rope, 2... Balance drum, 2C... Guide member, 3... Rope fixing socket, 4... Pin, 5... Hanging metal fitting with hook,
6... Axis.

Claims (1)

[Scope of utility model registration request] A balance drum is horizontally supported on a hanging metal fitting with a hook, and a rope fixing socket having a pin hole is fixed to the tip of each of two lifting ropes, and the rope fixing socket is attached to both end surfaces of the balance drum. each with a pin, and guide the two lifting ropes from the fixed positions on both end surfaces of the balance drum onto the circumferential surface of the balance drum via arc-shaped guide members provided on both cross sections. , A hook device for a crane, characterized in that the hooks are wound around the center of the balance drum in opposite rotational directions.