JPH04306329A - Claw tool for bucket - Google Patents

Abstract

PURPOSE:To provide a claw tool for civil engineering construction equipment and the bucket of an excavator wherein the claw can be attached to an adapter in a state that any of four surfaces of upper and lower and right and left surfaces may be an under surface. CONSTITUTION:A tapered engaging protrusion part 1 in a regular square in cross section is formed on the one end side of an adapter A and grooves 2 for engagement symmetrical to each other are formed in the upper and lower and right and left surfaces of a part opposite to the tip part of the engaging protrusion part l. An engaging hole 3 in which the engaging protrusion part 1 is engaged and which is formed in a regular square in cross section and protrusions 4 for coupling being symmetrical to each other are formed on the one end side of a claw N. Holes 5 and 6 for coupling which are caused to coincide with each other are formed in the engaging protrusion part l and the protrusion 4 for coupling. The hole 3 for engagement of the nail N is engaged with the protrusion part 1 for engagement of the adapter A, the protrusion 4 for coupling of the nail N is inserted in the groove 2 coupling of the adapter A, a rocking pin 7 and a rubber lock piece 8 are inserted in the holes 6 and 5 for coupling of the protrusion 4 for coupling and the protrusion part 1 for engagement, respectively and the claw N is fixed to the adapter A. The claw N is removed when occasion demands and the claw is rotated in a 90 deg. arc or a 180 deg. arc, and the claw N is fixed in the phase to the adapter A.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bucket hook for civil engineering construction machines and excavation machines.

0002

2. Description of the Related Art Next, a conventional bucket hook will be explained with reference to FIG. A tapered fitting protrusion 9 having a rectangular cross section is formed on one end side of the adapter A, which is attached to the bucket by welding or the like. are provided with mutually symmetrical coupling grooves 2. A fitting hole having a rectangular cross-sectional shape into which the fitting protrusion 9 is fitted, and a mutually symmetrical coupling protrusion 4 are provided on one end side of the claw N. The fitting protrusion 9 and the coupling protrusion 4 are provided with a coupling hole 5 to match each other.
, 6 are provided, respectively.

The fitting projections 9 of the adapter A are fitted into the fitting holes of the claws N, and the coupling protrusions 4 of the claws N facing each other are inserted into the respective coupling grooves 2 of the adapter A. The locking pin 7 and the rubber locking piece 8, which are coupling tools, are inserted into the coupling hole 6 of the adapter and the coupling hole 5 of the fitting protrusion 9, and the claw N is fixed to the adapter A.

0004

[Problems to be Solved by the Invention] When excavation work continues for a long time, for example, only the lower surface of the claw N on the bottom side of the bucket wears out, and if the excavation work is continued further, the adapter A
Adapter A also wears out, and it becomes necessary to replace adapter A. In the conventional claw tool, the fitting protrusion 9 of the adapter A and the fitting hole of the claw N have a rectangular cross-section, and even if the claw N is formed vertically symmetrically, only two sides thereof can be used.

[0005] The present invention has been made in view of the above, and an object of the present invention is to provide a claw tool that can be attached to an adapter by rotating the claw by 90 degrees or 180 degrees depending on the wear of the claw. shall be.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention forms a tapered fitting protrusion on one end side of the adapter, and the top and bottom of the opposite tip of the fitting protrusion, A coupling groove that is symmetrical to the left and right is provided, a fitting hole and a coupling protrusion that is symmetrical to each other are provided on one end side of the claw, and the coupling hole is made to match the fitting protrusion and the coupling protrusion with each other. and fit the fitting hole of the claw into the fitting protrusion of the adapter,
In a bucket claw tool in which a coupling protrusion of a claw is inserted into a coupling groove of an adapter, and a coupling tool is inserted into a coupling hole between the coupling protrusion and the fitting protrusion, the coupling protrusion and the fitting hole are inserted. It is characterized by having a square cross-sectional shape.

[0007]

[Operation] If necessary, remove the claw from the adapter, rotate it 90 degrees or 180 degrees, and attach the claw to the adapter in that phase.

[0008]

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.
This is explained by: In those figures, the same reference numerals as in FIG. 6 indicate the same or equivalent parts.

[0009] The fitting protrusion 1 of the adapter A has a square cross-sectional shape, and a claw N to be fitted into the fitting protrusion 1 is square.
The cross-sectional shape of the fitting hole 3 is also a similar square. The fitting projection 1 is provided with a coupling hole 5 in the orthogonal direction, and each coupling projection 4 of the claw N is provided with a coupling hole 6. The rest is the same as the conventional claw tool. H in Figures 2 and 4
is the dimension of the maximum side of the fitting protrusion 1, h is one side of the tip of the fitting protrusion, that is, the minimum side, and H in FIGS. 3 and 5 is one side of the opening end of the fitting hole 3, that is, the maximum side. The dimension h represents one side of the bottom of the fitting hole 3, that is, the dimension of the minimum side.

When the lower surface of the claw N attached to the adapter A wears out, remove the locking pin 7 and the rubber lock piece 8, rotate the claw N by 90 degrees or 180 degrees, and then attach the claw N to the adapter A. Install. As a result, the lower surface of the claw N is replaced with a new surface.

[0011]

According to the invention as described above, wear of the adapter can be prevented by removing the claw and rotating it 90 degrees or 180 degrees and attaching it again depending on the wear on the lower surface of the claw. It is economical because the four sides of the nail (top, bottom, left and right) can be used as the bottom surface. In addition, since the cross-sectional shape of the claw remains square and tapers, it is effective for field work where biting is important.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;

[Figure 2
]A side view showing an adapter according to an embodiment of the present invention;

[Figure 3
]A side view showing a claw according to an embodiment of the present invention;

[Figure 4] Figure 2
left side view of

[Fig. 5] Right side view of Fig. 3,

FIG. 6 is an exploded perspective view showing a conventional bucket hook.

[Explanation of symbols]

A Adapter N Nail 1 Fitting protrusion 2　Connecting groove 3 Fitting hole 4. Connection protrusion 5 Connection hole 6 Connection hole 7 Locking pin 8 Rubber lock

Claims (1)

[Claims] Claim 1: A tapered fitting protrusion is formed on one end side of the adapter, and symmetrical coupling grooves are provided on the top and bottom, left and right sides of the opposite tip of the fitting protrusion, and the adapter has a tapered fitting protrusion on the one end side of the claw. A fitting hole and a coupling protrusion symmetrical to each other are provided in the adapter, a coupling hole is provided in which the fitting protrusion and the coupling protrusion match each other, and the fitting hole of the claw is fitted into the fitting protrusion of the adapter. In the bucket claw tool, the coupling protrusion of the claw is inserted into the coupling groove of the adapter, and the coupling tool is inserted into the coupling hole between the coupling protrusion and the fitting protrusion. and a hook for a bucket, characterized in that the cross-sectional shape of the fitting hole is square.