JPH08188387A - Hook block storing device - Google Patents

Abstract

PURPOSE: To prevent the removal of a bracket for storing and a poor working thereby, even though a wire rope is loosened in case of emergency, so as to prevent a dangerous condition, by fixing a hook block and the bracket-for storing to a boom simultaneously, in a working vehicle such as a moving type crane. CONSTITUTION: On the engaging surface of a hook block 9 and a bracket 6 for storing, an irregular fitting part of holes 8 and projections 7 is formed, and the hook block 9 and the bracket 6 for storing integrated through the fitting part are fixed simultaneously to a member 10 provided to the storing position of a boom 1, or to a link to slide an elongate hole by using pins.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hook block storage device for a mobile crane or the like.

[0002]

2. Description of the Related Art As a conventional technique, there are many cases in which a hook and a storage bracket are fixed only by the tension of a wire rope, and the wire rope is fully wound to be held in a storage position. For example, gazettes such as Japanese Utility Model Publication No. 51-32868 and Japanese Utility Model Publication No. 3-89087 can be referred to. Also, for some of them, like the publication of Japanese Utility Model Laid-Open No. 4-60996,
In some cases, when the wire rope is wound up and moved to the retracted position, only the hook is fixed to the boom with a pin by the connecting device. In the publication of Japanese Utility Model Laid-Open No. 4-65289, only the hook is automatically moved due to the winding tension of the wire rope. In some cases, the boom is mechanically engaged and fixed.

[0003]

However, many of the above-mentioned conventional storage devices hold the predetermined storage position only by the tension of the wire rope when storing the hook, and some of them store the hook block on the boom or the like. Some of them are fixed and held, but since the storage bracket is not fixed, if the wire rope becomes loose due to vibration during driving, drum clogging, or any other reason, the hook slips off, or the connection between the storage bracket and the hook The problem remains that there is a danger that the hooks will hang around and become unstable due to a mismatch.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and forms a fitting portion of a projection and a recess of a hole and a protrusion on an engaging surface of a hook block and a storage bracket. A member in which the hook block and the storage bracket integrated by the fitting portion are provided at the boom storage position,
Alternatively, the link that slides in the long hole is fixed at the same time by the pin.

[0005]

With the above construction, both the hook block and the storage bracket can be securely fixed to the storage position of the boom at the same time, so that there is no risk of the wire rope falling off or falling.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1, FIG. 2 and FIG. 3 are a front view, a left side view and a rear view of the first embodiment of the present invention. Plates 2 and 3 that support the pin 5 of the load sheave and the pin 4 of the storage bracket are provided on the lower surface of the boom 1.
The storage bracket 6 is attached via the pin 4 in a state of being sandwiched between the three. The storage bracket 6 may be attached to the outside of the plates 2 and 3.

A hole 8 is formed in the lower surface of the storage bracket 6, and a projection 7 provided on the upper surface of the hook block 9 is fitted into the hole 8. This fit may be achieved by providing a protrusion on the lower surface of the storage bracket 6 and providing a hole on the upper surface of the hook block 9. FIG.
FIG. 3 is a diagram for explaining the relationship between the fitting portion formed by the hole 8 and the protrusion 7.

After the protrusion 7 is fitted in the hole 8 shown in FIG. 5, when the wire rope 20 is further wound up, the boom 1 is centered around the pin 4 of the storage bracket 6.
Of the storage bracket 6 hits the pin 5, and the integrated hook block 9 and storage bracket 6 are fixed to the bottom surface of the boom 1. A plurality of holes of the hook block 9 and the storage bracket 6 which are integrated at this fixed position are aligned with the holes 17 of the member 10 attached to the boom 1 and protruding. All the holes are skewered by one pin 15 and fixed to hold the hook retracted state. FIG. 6 shows this state.

FIG. 7 shows a second embodiment of the present invention. Instead of the member 10 protruding from the boom 1, a slot 1 is provided.
A link 1 having a pin 13 for attaching a plate 11 having 2 to the lower surface of the boom 1 and freely sliding an elongated hole 12
4, the hole 17a at the other end of the link 14 is made into a skewer by aligning a plurality of holes of the hook block 9 and the storage bracket 6 that are integrally wound up to form a skewer.
It is a structure for fixing the hook and holding the retracted state of the hook. In this case, when the link 14 does not store the hook, the pin 15 is fitted into the hole 16 of the plate 11 and stored, whereby the amount of unnecessary protrusion from the bottom surface of the boom 1 can be minimized. Is. This second
In the second embodiment, the positioning of the hole 17a of the link 14 is facilitated by the effect of the elongated hole 12, and the positions, dimensions, etc. of the holes of the hook block 9, the storage bracket 6, and the member 10 are the same as in the first embodiment. Since it is not necessary to make the accuracy of Severe severe, it is also advantageous in terms of cost. In addition, in FIG. 7, the long hole 1
Although 2 is provided horizontally, it may be inclined, and by operating the pin 15 using a method such as hydraulic pressure, it is possible to save the operator's work and improve safety. It is possible.

The wire rope 20 coming out of the load sheave 21 enters the sheave 23 of the hook block 9, and the wire rope 20 coming out of the sheave 23 is in the load sheave 21.
Return to road sheave 22 and then sheave 2
Since the hook block 9 is guided to the socket 25 via 4 as shown in FIG. 1 and the like, the hook block 9 is always stabilized at a position pivoted with respect to the axis of the boom 1. Therefore, it is preferable that the protrusion 7 of the hook block 9 is aligned with the axis of the boom 1 and is obliquely attached to the hook block 9 in a pivoted position. As a result, it is possible to prevent twisting or bending of the wire rope or bending of the wire rope 20 at the socket in the stored state.

[0011]

As described in detail above, according to the present invention, both the hook block and the storage bracket can be securely fixed to the retracted position of the boom at the same time. It is possible to reliably prevent the danger that the storage bracket will fall off when the hook is stored, or that both the hook block and the storage bracket will fall off or fall, with a simple operation, contributing to improved safety. To do.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

2 is a left side view of the first embodiment shown in FIG. 1. FIG.

FIG. 3 is a rear view of the first embodiment shown in FIG.

FIG. 4 is a perspective view illustrating a relationship between a storage bracket, a hole of a hook block, and a protrusion.

FIG. 5 is a side view showing a state in which the wire rope is wound up from the state of FIG. 2, the joint surfaces of the hook and the storage bracket are aligned, and the holes and the projections are fitted.

FIG. 6 is a side view showing a state in which the wire rope is further wound up from the state of FIG. 5 and the member, the bracket and the hook are skewered with a pin and fixed.

FIG. 7 is a side view showing a second embodiment of the storage device in which the amount of protrusion of the member on the lower surface of the boom is reduced.

[Explanation of symbols]

 1 Boom 6 Storage bracket 7 Protrusion 8 Hole 9 Hook block 10 Member 11 Plate 12 Long hole 13 Pin 14 Link 15 pin 17 Hole 20 Wire rope

Claims (3)

[Claims] 1. A mobile crane vehicle having a hook block storage device for fixing a hook block 9 to a storage position on the lower surface of the boom 1 via a storage bracket 6 swingably attached to the boom 1. Block 9
The hook block 9 and the storage bracket 6 which are formed by forming the projections 7 and the holes 8 on the engagement surface of the boom and the storage bracket 6 have a concave and convex portion, and are integrated with each other. The hook block storage device is characterized in that it is fixed at the same time. 2. The hook block 9 and the storage bracket 6 are inserted into the holes 17 of the member 10 provided at the storage position of the boom 1.
The hook block storage device according to claim 1, wherein the fitting portion of the hook block is fixed by the pin 15 at the same time. 3. A plate 11 having an elongated hole 12 is provided at a retracted position of the boom 1, and a fitting portion of a hook block 9 and a storage bracket 6 is fitted to a link 14 that slides in the elongated hole 12 via a pin 13. The hook block storage device according to claim 1, wherein the hook blocks are simultaneously fixed by the pins 15.