JPH08145124A - Wire rope metal fixture for construction machine - Google Patents

Abstract

PURPOSE: To reduce the labor for fastening by furnishing a socket for wire rope fixture, which fastens the overlapped portion of wire rope led out of rope socket using a rope clip, with a means to preclude the wire rope from slipping off due to resilience when the wire rope is to be installed. CONSTITUTION: A pin-shaped stopper 10 is set in a hole. Even if the ring-shaped end 1b of a wire rope 1 is going to hop out of a hollow 6b the resilience in the moment the end 1b is pulled into the hollow 6b together with a cotter 8, it runs against the stopper 10 and is hindered from hopping out. Even through the wire rope 1 is not put in the tightened condition, the rope 1 is accommodated in the hollow 6b in the fixed state. In this condition, the overlapped portion 1a of the outlet from a rope socket 6 of wire rope 1 is fastened by a rope clip 9, and thereby fixation is completed in the condition that the rope 1 is pinched by the end inner surfaces of the cotter 8 and socket 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane or a construction machine for lifting a load or a heavy load with a wire rope, such as a bucket-based excavator using the crane as a base machine. Regarding the fixing metal fittings to be attached.

[0002]

2. Description of the Related Art FIG. 2 (A) is a side view of a boom top for explaining a wire rope fixing fitting in a crane. A hoisting wire rope 1 is unwound and unwound by a crane body (not shown). It is hung around the sheave block 3 on the top of the boom 2 and the sheave block 4 of the hook, and the end of the wire rope 1 is fixed to the bracket 2a on the top of the boom 2 by the pin 7 and the fixing metal fitting 5. .

FIG. 2B is a side view showing a conventional wire rope fixing metal fitting 5. The fixing metal fitting 5 has a rope socket 6 having a mounting portion 6a by the pin 7 and a wedge shape of the rope socket 6. As shown in the perspective view of FIG. 2 (C), the cotter 8 housed in the inner empty portion 6b, the upper end 8a of which is formed in a circular shape, and the groove 8b into which the wire rope 1 is fitted is formed, and the wire rope 1 And a rope clip 9 that fastens the overlapping portion 1a protruding from the rope socket 6. The rope clip 9 includes a saddle 9a and the saddle 9a.
A U-bolt 9b which is inserted into the two holes formed in the upper part of the wire rope 1 to sandwich the overlapping portion 1a of the wire rope 1 with the saddle 9a, and a nut 9c which is screwed into the U-bolt 9b and fastens the overlapping portion 1a. The cotter 8 generates a frictional force between the wire rope 1 and the rope socket 6, and the rope clip 9 fixes the wire ropes 1 to each other and prevents the cotter 8 from rising.

In the crane, when the number of ropes between the sheave blocks 3 and 4 is changed or when the wire rope 1 is replaced, the fixing fitting 5 is removed from the end of the wire rope 1 and is shown in FIG. 2 (D). So a new wire rope 1
To the cotter 8 and put the cotter 8 together with the annular end 1b of the wire rope 1 into the wedge-shaped inner hollow portion 6b, and the wire rope 1 from the rope exit side of the inner hollow portion 6b by manual force as shown by arrows a and b. Pull, annular end 1b is groove 8 of cotter 8
Then, the overlapping portion 1a of the wire rope 1 is fastened by the rope clip 9 in this state, and the preparation of the wire rope 1 is completed.

[0005]

However, when the diameter of the wire rope 1 becomes large, for example, 20 mm or more, the bending rigidity of the wire rope 1 becomes large,
At the moment when the impact of pulling the wire rope 1 disappears, the wire rope 1 is elastic, and the annular end 1b jumps out of the inner space 6b of the rope socket 6 as shown in FIG. There is a problem in that the rope clip 9 must be fastened by a few people while a large amount of tension is being applied to the rope 1 by human power, and the rope clip 9 is difficult to fasten and requires a lot of labor. It was

The present invention has been made in view of the above problems of the prior art.
An object of the present invention is to provide a structure that facilitates fastening of a wire rope in a wire rope fixing metal fitting of a construction machine with a rope clip and reduces labor.

[0007]

In order to achieve the above object, the present invention puts the annular end of a wire rope wound around a cotter together with the cotter into the wedge-shaped inner space of the rope socket, In a wire rope fixing metal fitting for a construction machine, which is formed by fastening overlapping portions of wire ropes that have been pulled out with a rope clip, the rope socket is provided with means for preventing the wire rope from slipping out when the wire rope is attached. To do.

[0008]

According to the present invention, when the wire rope is fixed to the fixing metal fitting, the annular end of the wire rope is accommodated together with the cotter in the wedge-shaped inner space of the rope socket, for example, in the hole provided in the rope socket. Prevent the wire rope from coming out by inserting a stopper or other means. In this state, the wire rope does not slip out of the inner space of the rope socket even if tension is not applied to the wire rope. Therefore, the fastening work by the rope clip can be performed without paying attention to the wire rope slipping out and labor.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A is a side view showing an embodiment of a wire rope fixing metal fitting for a construction machine according to the present invention.
(D) and (E) are EE, FF, and G of (A), respectively.
-G sectional view, (C) is a transverse sectional view showing an inserted state of the stop 10. In this embodiment, FIG.
As shown in (B), the upper side of the accommodating portion of the cotter 8 of both side plate portions forming the wedge-shaped inner space 6b of the rope socket 6 (however, the outlet side of the wire rope 1 may face upward depending on the mounting location). The hole 6 into which the stopper 10 is inserted is provided so as to penetrate.

Then, as shown in FIG. 1A, at the moment when the annular end 1b of the wire rope 1 is pulled into the inner space 6b together with the cotter 8, as shown in FIG. A stopper 10 composed of a pin-shaped tool or a driver or the like, which is normally provided in the field used for alignment and the like, is inserted into the hole 6. In this state, even if the annular end 1b of the wire rope 1 tries to jump out of the inner space 6b due to elasticity, the annular end 1b of the wire rope 1 comes into contact with the stopper 10 to prevent the jump. , Even if the wire rope is not pulled, the wire rope 1 has an inner space 6
It is accommodated and fixed in b. Figure 1 in this state
As shown in (E), the wire clip 1 is fastened to the cotter 8 and the rope as shown in FIG. 1C by fastening the overlapping portion 1a of the outlet of the wire rope 1 from the rope socket 6 with the rope clip 9. The fixing (preparation) of the fixing metal fitting 5 to the wire rope 1 is completed in a state where it is sandwiched between the inner surfaces of both ends of the socket 6 and the cotter 8 is prevented from rising by the rope clip 9.

When a tool is used as the stopper 10 as in the present embodiment, it is pulled out from the hole 6c after the preparation is completed as described above, but a dedicated pin can be used as the stopper 10 in that case. Alternatively, the stopper may be left attached to the hole 6c. Also, the hole 6
The c may not be provided on both side plates, but may be provided so as to penetrate through both ends (left and right in FIG. 1B) in the longitudinal direction of the inner space portion 6b.
As means for preventing the annular end 1b from slipping out, a stopper is inserted into the inner space 6b from the outside and the stopper is locked by a locking portion provided on the rope socket 6 or the like. However, the structure shown in the embodiment has an advantage that it can be implemented at low cost without adding a component or only by adding the stopper 10 when a dedicated stopper is provided. .

The present invention is, in addition to a crane, for an excavator or the like for excavating work by attaching a clamshell bucket with a wire rope hanging from a boom, and fixing the end of the wire rope to a boom, a main body or the like with fixing metal fittings. Applicable.

[0013]

According to the first aspect of the present invention, with the annular end of the wire rope pulled into the inner space of the rope socket together with the cotter, the wire rope is prevented from coming out of the inner space of the wire rope by the wire rope coming-out prevention means. In this state, it is possible to fasten the wire rope at the overlapping portion of the rope socket outlet of the wire rope without applying tension to the wire rope. And labor is reduced.

According to the second aspect of the present invention, by using a tool which is always available in the field as a stopper, no additional parts are required, or only a stopper having a simple shape is added as an additional part, which is inexpensive. Can be carried out.

[Brief description of drawings]

FIG. 1 (A) is a side view showing an embodiment of a wire rope fixing metal fitting for a construction machine according to the present invention, (B), (D),
(E) is EE, FF, GG sectional drawing of (A), respectively, (C) is a cross-sectional view which shows the insertion state of the stop 10. FIG.

2A is a side view of a boom top for explaining a wire rope fixing bracket in a crane, FIG. 2B is a side view showing a conventional wire rope fixing bracket, FIG. 2C is a perspective view showing a cotter, and FIG. [Fig. 4] is a side view for explaining a problem of a wire rope preparation work in a conventional fixing fitting.

[Explanation of symbols]

1: wire rope, 1a: overlapping portion, 1b: annular end portion,
6: rope socket, 6a: attachment part, 6b: inner space part,
6c: hole, 8: cotter, 9: rope clip, 10: stopper

Claims (2)

[Claims] 1. An annular end portion of a wire rope wound around a cotter is put together with a cotter in a wedge-shaped inner space of the rope socket, and an overlapping portion of the wire rope that comes out of the rope socket is fastened by a rope clip. A wire rope fixing bracket for a construction machine, wherein the rope socket is provided with a means for preventing the wire socket from coming off due to elasticity of the wire rope when the wire rope is attached. 2. The device according to claim 1, wherein the means for preventing the wire rope from coming off is provided with a hole provided above the cotter accommodating portion of the rope socket and an annular end portion of the wire rope which is inserted into and attached to the hole. A wire rope fixing metal fitting for construction machinery, which is composed of a stopper to be in contact with.