JP2546871Y2 - Grapple - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grapple attached to a tip of a work attachment of a construction machine such as a hydraulic excavator or a work vehicle, and for gripping a log member or the like.

[0002]

2. Description of the Related Art FIG. 7 is a partially cutaway side view of an essential part of a hydraulic excavator equipped with a grapple 1 of the prior art. In the figure, reference numeral 2 denotes a work attachment of a hydraulic shovel, 3 denotes a log member, and 4 denotes a side wall of a log storage area. FIG. 8 is a detailed view of a portion A in FIG. In the figure, 5 is a bracket of the grapple 1, 6 is a slewing bearing, 7 is a grapple body, 8 and 9 are grapple forks that open and close together as a pair,
Reference numeral 10 denotes a hydraulic cylinder, 11 denotes a link, 12 denotes a turning motor, and 13 denotes a swivel joint.

[0003] Next, a prior art grapple 1 will be described with reference to Figs. The grapple 1 is attached to the tip of a multi-joint work attachment 2 attached to the front of a hydraulic excavator, and operates a pair of grapple forks 8 and 9 by operating a hydraulic cylinder 10 disposed inside the grapple main body 7. The log member 3 is held open and closed so as to be gripped.

[0004]

In the prior art grapple 1, the pair of grapple forks 8 and 9 are shaped in a side view as shown in FIG. Each is formed in a tapered curved shape. Therefore, as shown in FIG.
Among the log members 3 arranged in the log storage area, for example, 1
It was difficult to pick a book log and grab it. Also, if you try to grab the log at the corner in contact with the inner surface of the side wall 4,
It was difficult. An object of the present invention is to provide a grapple that can solve the above problems.

[0005]

In the present invention, one of the grapple forks of the pair of grapple forks is formed in a curved shape that tapers inward toward the inner side to be gripped from the vicinity of the center to the distal end side in a side view, Further, the other grapple fork was formed in a tapered linear shape from the vicinity of the center portion to the distal end side in the same side view, so that the pair of grapple forks could be opened and closed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partially cutaway side view of an essential part of a hydraulic excavator equipped with the grapple 14 of the present invention. In the figure, the same components as those of the conventional art are designated by the same reference numerals. FIG. 2 is a detailed view of a portion B in FIG. In the figure, 9 'and 15 are a pair of grapple forks,
11 'is a link. FIG. 3 is a view showing a state where the grapple forks 9 ′ and 15 in FIG. 2 are closed.
FIG. 4 is a rear view as viewed from C in FIG. FIG.
FIG.

Next, the structure of the grip 14 of the present invention will be described with reference to FIGS. In the grapple 14, one grapple fork 9 'of the pair of grapple forks 9' and 15 has a central portion c in a side view (shown in FIG. 2).
The other grapple fork 15 is formed in a tapered straight line from the vicinity of the center portion E to the front end (f) side in the same side view in the same side view. The grapple forks 9 'and 15 are configured to be opened and closed.

Next, the operation of the grapple 14 of the present invention will be described. One of the pair of grapple forks 9 ′ and 15 is formed in a tapered curved shape from the vicinity of the center portion to the distal end side in a side view, so that the grapple fork 9 ′ when the log member 3 is gripped.
A part of the outer peripheral surface of the log member 3 can be supported by the curved inner surface on the distal end side of the log member 3. Further, the other grapple fork 15 is formed in a tapered linear shape from the vicinity of the center portion to the tip end side in a side view. You can plug it in between. That is, since the grapple fork 15 can be inserted between the logs like a wedge between logs and between the logs and the inner side surface of the side wall, the required logs among the logs arranged in the log storage area can be used. You can select and hold.

FIG. 6 is a side view of a main part showing a state in which the grapple 14 is used for a fork operation. In the fork operation in FIG. 6, the grapple fork 15 can be inserted by inserting the grapple fork 15 below the log member 3 placed on the ground and pressing the grapple fork 9 'from above the log member 3. . in this case,
The object of the fork operation is not limited to the log member 3 and may be another object.

[0010]

In the prior art grapple, the pair of grapple forks is formed such that the side view shapes of the pair of grapple forks are tapered inward from the vicinity of the center to the front end side. Therefore, it was difficult to select one of the logs arranged in the log storage area and try to grab it, or to try to grab a log in a corner in contact with the inner surface of the side wall. However, in the present invention, one grapple fork of the pair of grapple forks is formed in a curved shape that tapers inward toward the inner side gripping from the vicinity of the center portion to the distal end side in a side view, and the other grapple fork is on the same side surface. It was formed in a tapered linear shape from the vicinity of the center to the distal end side. Thus, when the other grapple fork exerts a pressing force in its linear longitudinal direction, it can be inserted between the contact outer peripheral portions of the logs. In other words, the grapple fork can be inserted between logs like a wedge, or between the logs and the inner surface of the side wall. Can be.
Therefore, in the construction machine and the work vehicle equipped with the grapple of the present invention, the workability of grapple work is improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a hydraulic shovel equipped with a grapple according to the present invention;

FIG. 2 is a detailed view of a portion B in FIG. 1;

FIG. 3 is a view showing a state in which a grip fork in FIG. 2 is closed.

FIG. 4 is a front view as viewed from C in FIG. 3;

FIG. 5 is a rear view as viewed from D in FIG. 3;

FIG. 6 is a side view of a main part showing a state in which the grapple of the present invention is used for fork work.

FIG. 7 is a partially cutaway side view of a hydraulic excavator equipped with a grapple of the prior art.

FIG. 8 is a detailed view of a portion A in FIG. 7;

[Explanation of symbols]

 1,14 grapple 2 work attachment 3 log member 4 side wall 7 grapple body 8,9,9 ', 15 grapple fork 10 hydraulic cylinder

Claims (1)

(57) [Scope of request for utility model registration] 1. A pair of grapple forks is opened and closed by operating a hydraulic cylinder attached to the tip of a multi-joint work attachment mounted on a front part of a construction machine and disposed inside a grapple main body, so that a log member is formed. A grapple to be gripped, wherein one of the pair of grapple forks is formed into a curved shape that is tapered inward toward the gripping side from near the center to the distal end side in a side view. The grapple is characterized in that the grapple fork is formed in a tapered straight line from the vicinity of the central portion to the tip end side in the same side view so that the pair of grapple forks can be opened and closed.