JPH0480197A - Hook fixing device for walking crane - Google Patents

Abstract

PURPOSE:To improve workability and prevent collision between a boom part and a hook part by arranging an elastic device between the boom part and the hook part of a walking crane. CONSTITUTION:A fitting bracket 13 is fitted to a hook plate 14 of a hook part 4 of a walking crane 2 with bolts 15, and an elastic device 12 is arranged between a boom plate 16 of a boom part 3 and the hook plate 14 of the hook part 4. When the hook part 4 is lifted at fixing the position of the hook part 4, the elastic device 12 is pinchedly pressed between the hook plate 14 of the hook part 4 and the boom plate 16 of the boom part 3 at the lifted position, the position of the boom part 3 is fixed against a truck, hereby, the position of the hook part 4 is fixed against the boom part 3. Hence the workability is improved and collision between the boom part 3 and the hook part 4 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a mobile crane hook fixing device used for fixing the position of a hook portion of a mobile crane mounted on a truck, a ship, or the like.

[Prior Art] For example, the structure shown in FIG. 4 is known as a mobile crane hook fixing device of this type.

Violet is a truck, and truck l has mobile crane 2.
The hook part 4 is suspended from the tip of the boom part S of the mobile crane 2 by a moving cable 5, such as a rope or wire, and the hook part 4 is suspended by a winch (not shown) so that it can rise and fall, Two locking hooks 7 are provided on the front bumper part 6, and a locking cable 9 is hung between the hook B of the hook portion 4 and the two locking hooks 7 when the mobile crane 2 is not in use. It is constructed so that the hook portion 4 is fixed in position.

[Problems to be Solved by the Invention] However, in the case of the above-mentioned conventional structure, the operation stirrup that performs the lifting operation of the hook part 4 of the mobile crane 2 is generally provided at the middle side of the truck 1. When the position is fixed, the operation knob 11 of the operation part cannot be operated while visually checking the raised position of the hook part 4, and as a result, the hook part 4 is raised too high by mistake, causing bending and damage to the front bumper part 6. This has the disadvantage that there is a possibility that

[Means for Solving the Problems] The present invention aims to solve these inconveniences, and the gist of the present invention is to provide a mobile crane that can be lifted up and down by a moving cable from the tip of the boom section of a mobile crane mounted on a truck or the like. A mobile crane hook fixing device for positionally fixing a lowered hook part, characterized in that an IIN is disposed between a boom part of the mobile crane and the hook part.

[Function] When the hook part is in the raised position, it is 91t! 1 will be pinched between the boom part and the hook part.

[Embodiment] FIGS. 1 to 3 show embodiments of the present invention, with FIGS. 1.2 showing the first embodiment, and FIG. 3 showing the second embodiment.

Incidentally, the same reference numerals are used for the same parts as the conventional structure shown in FIG. 4 above.

In the first embodiment of FIG. 1.2, the bullet is a bullet, and
In this case, a rubber material is used, and the rubber material that is used as a bullet is fixed to the mounting bracket, and the mounting bracket B is attached to the hook plate μ of the hook portion 4 using a holder, and the boom plate filling of the boom portion 3 and the hook are attached. One IG machine is disposed between the hook plate of the section 4 and the hook plate.

Since this first embodiment has the above-mentioned configuration, when the hook part 4 is raised when the position of the hook part 4 is fixed, the bullet I is fired at the raised position. [ is pressed between the hook plate U of the hook part 4 and the boom plate holder of the boom part 3, and the boom part 3
is fixed in position with respect to the truck 1. Therefore, the hook part 4 can be fixed in position with respect to the boom part 3, and the position can be fixed very easily, improving work efficiency, and the boom part 3 and the hook part can be fixed in position. It is also possible to prevent a collision with 4.

The second embodiment shown in FIG. 3 shows a structure in which the valve mt
A spring material is used as Z, the lower member U is attached to the hook plate 14, the upper cylinder material is vertically slidably engaged with the lower member U, and the upper cylinder member is biased by the spring material. It is configured as follows.

This second embodiment also provides the same effects as the first embodiment.

Incidentally, the structure of the bullet recognition device, the mounting position, etc. are not limited to those of the above-mentioned embodiments, and may be designed with appropriate changes.

Furthermore, although the above embodiments apply the present invention to a mobile crane mounted on a truck, it can also be applied to a mobile crane mounted on a ship or the like.

[Effects of the Invention] As described above, the present invention provides the following advantages when fixing the position of the hook part:
When the hook part is raised, the ammunition is pressed between the hook plate of the hook part and the boom plate of the boom part in the raised position, which allows the hook part to be fixed in position relative to the boom part, making it extremely easy to position. It can be fixed and work efficiency can be improved, and collisions between the boom part and the hook part can be prevented, which has a remarkable effect.

As described above, the intended purpose can be fully achieved.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a perspective view of the first embodiment, FIG. 2 is a partial side view thereof, and FIG. 3 is a second embodiment.
A partial side sectional view of the embodiment, and FIG. 4 is a perspective view of the conventional structure. 1...Truck, 2...Mobile crane, 3...Boom part, 4...Hook part, 5...Moving rope, demand...Munition aircraft. Figure 2 Figure 3

Claims (1)

[Claims] A hook part that is suspended from the tip of a boom part of a mobile crane mounted on a truck or the like so that it can be raised and lowered by a moving cable is fixed in position, and an ammunition is placed between the boom part of the mobile crane and the hook part. A mobile crane hook fixing device characterized in that it is configured by arranging.