JP2753451B2 - Sliding double hook - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding double hook in a crane.

[0002]

2. Description of the Related Art Conventionally, a hook for maximum load on a crane has been prepared for suspending a load with a crane, and a small hook has been separately prepared for suspending a small load. In other words, it is necessary to own both a hook for a maximum load, which is extremely rarely used, and a hook for a small load, which is frequently used, which is uneconomical.

[0003]

As described above, the uneconomical problem of always preparing two types of hooks for the maximum load and the small load is eliminated, and the two hooks are combined to suspend both the large load and the small load. If the hanging load is small, work can be done with only one hook, and work can be done with two hooks that are also used as hooks of another machine. It is an object of the present invention to provide a configuration in which two hooks are not separated from each other when they are combined, and to provide a double hook capable of performing the above.

[0004]

Means for Solving the Problems A frame 6 for suspending a sheave 7 at the upper part and a hook 2 at the lower part, a concave guide device 5A on one side of the frame 6 and a parallel guide on the other side. A convex guide device 5B is provided so that when the two hooks are used in combination, the concave guide device 5A and the convex guide device 5B can be connected to be slidable up and down.

[0005]

First, wiring is performed from the two winch drums 3a and 3b to the sheave 7 at the top of each hook 2A and 2B. Next, in order to align the concave and convex guide devices 5A and 5B on the side surfaces of the hooks, of the two hooks 2A and 2B suspended at different heights from the end of the boom,
The hooks on the lower side are wound up to guide the concave and convex guides 5A and 5A.
Slide B to adjust the height position. After adjusting the height of the two hooks, switch the hooks so that they can be controlled with a single lever.

[0006]

1 shows a cradle using a sliding double hook according to the present invention. FIG. 1 (a) is a side view of a cradle 1, and FIG. 1 (b) is a left front view of FIG. FIG. Reference numeral 2 denotes a sliding double hook according to the present invention, 3 denotes a winch drum for driving each hook, and 4 denotes a wire rope.

When a load is hung by such a crane, the hook entirely rotates to some extent during the work due to the effect of the twist of the rope. If a plurality of hooks are used simultaneously in this state, they may collide with each other and be damaged. In addition, when the hooks are moved up and down separately, they may be caught by the protrusions of each other and may not be able to move up and down as desired.

According to the present invention, in order to solve such a problem, a guide device is provided between a hook and a frame of the hook, and the two guide devices are adjacently fitted and integrated to prevent rotation of the hook. Even when the heights of the hooks are different from each other, the hooks are slid along the guide so that the position can be easily adjusted.

The details will be described below with reference to FIG. FIG. 2 shows a state in which two hooks 2A and 2B are connected and used. The hook 2A and the hook 2B are provided with a concave guide device 5A and a convex guide device 5B on both sides. When two hooks are used in combination, these concave and convex guide devices 5A and 5B are connected to each other in FIG.
As shown in FIG. 2B, it is slidable in the longitudinal direction, that is, vertically.

An embodiment will be described with reference to FIGS. The hook 2 is attached to a lower part of the frame 6. A sheave 7 for winding a wire rope 4 driven by the winch drum 3 is supported by pins 8 on the upper portion of the frame 6. The hook 2 is rotatably supported around a pin 9 fixed to the frame 6, and is configured to be able to bend laterally on the ground surface as shown by a virtual line in FIG.

The frame body 6 is provided with a concave guide device 5A on one side and a convex guide device 5B on the other side as described with reference to FIG. As described above, when two such hooks are combined, as shown in FIG. 5, the concave and the convex are fitted and used so that they can slide up and down.

The hooks constructed as described above are used in combination as shown in FIG. 5. First, wiring is performed from the two winch drums 3a, 3b to the sheaves 7 at the tops of the hooks 2A, 2B, respectively. Perform Next, in order to align the concave and convex guide devices 5A and 5B on the side of the hook,
Of the two hooks 2A and 2B suspended at different heights from the end of the boom, the height of the uneven guide devices 5A and 5B is adjusted while winding up the lower hook. When the heights of the two hooks were adjusted, the two winch drums 3a and 3b were separately controlled.
This is switched so that two hooks can be controlled integrally with one lever. When controlling separately, switch again and operate. After switching, two hooks are simultaneously operated by one lever. When each of the drums is operated separately, the winch drums 3a or 3b are individually operated as necessary after switching with a button switch.

[0013]

[Effect] A concave guide device 5A is provided on one side of a side of a frame body for hanging hooks at a lower portion, and a convex guide device 5B is provided on the other side.
When two hooks provided with such a guide device are used in combination, the concave guide device 5A and the convex guide device 5A are used.
B was slidably coupled up and down to facilitate height alignment. With this configuration, the two hooks can be combined and used as a single unit, so that either a large load or a small load can be hung. Of course, when the hanging load is small, the work can be performed with only one hook. Also, work can be performed with two hooks, also using the hooks of another machine. Such a crane, in which a large load is suspended or a small load is suspended, is very economical because it is not necessary to always prepare a large load hook. In addition, since the connection is performed by using the slide type guide device, even if the wire rope is twisted and the hook is rotated, the problem such as damage can be solved.

[Brief description of the drawings]

FIG. 1 (a) is a side view of a crane lane, and (b) is (a).
FIG.

FIG. 2 is an explanatory diagram of uneven engagement of a hook.

FIG. 3 is a detailed view of a hook.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a front view of a state in which two hooks are combined by uneven fitting.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cray lane 2 Slide type double hook 2A, 2B hook 3 Winch drum 4 Wire rope 5A Concave guide device 5B Convex guide device 6 Frame 7 Sheave 8, 9 pin

Claims (1)

(57) [Claims] 1. A sheave (7) at an upper part and a hook (2) at a lower part.
(6), a guide device (5A) concave on one side of the frame (6), and a convex guide device (5B) parallel to the other side on the other side.
A sliding double hook wherein the concave guide device (5A) and the convex guide device (5B) can be slidably coupled up and down when two hooks are used in combination.