JPH11182062A - Attachment movable arm of power shovel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment for movable arms of a power shovel to permit safely and easily cutting a reinforcing bar, metal pipe, metal plate, angle member, wooden column or the like. SOLUTION: An attachment 6 is installed to the tip portions of movable arms of a power shovel. That is, a pair of clamping members 10, 32 are pivoted to the tip portions of the movable arms with hinges in a freely opening and closing manner, and blade portions 14, 34 are provided for cutting an object W1 to be cut at the edge portions facing each other of the clamping members 10, 32 when the clamping members 10, 32 are closed, at that time, the object W1 is cut off when the blades in contact are moved, both of the blade portions 14, 34 being arranged in an inverted chevron shape with the blades closing from the tip side for cutting an object.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attachment attached to a distal end of a movable arm of a power shovel.

[0002]

2. Description of the Related Art Conventionally, a house or the like is often dismantled using a fork device provided at the tip of an arm of a power shovel.

[0003]

However, in a conventional excavator fork device, a reinforcing steel bar or a metal pipe for piping used in a house or the like, or an angle material such as an L-shaped steel or a C-shaped steel is cut. Since gas burners were used to cut them, efficient dismantling operations could not be performed.

[0004] In addition, the work of cutting a reinforcing bar or the like using a gas burner is dangerous because the flame of the gas burner may ignite surrounding wood and the like.

An object of the present invention is to provide an attachment for a movable arm of a power shovel, which can easily and safely cut a reinforcing bar or a metal pipe.

[0006]

According to the present invention, the above-mentioned problem is solved as follows. (1) In an attachment attached to the front end of a movable arm of a power shovel, a pair of front and rear clamping members are pivotally connected to the front end of the movable arm so as to be freely openable and closable. When the clamping members are closed, respectively, by overlapping and slidingly contacting each other,
A blade for cutting an object to be cut is provided so as to start polymerization from its front end.

(2) In the above item (1), a closing plate for closing a space between the rear ends of the two blades is provided at a pivotal portion of the pair of front and rear clamping members.

[0008]

An embodiment of the present invention will be described below with reference to the accompanying drawings. In the following description, the left side of FIG.

As shown in FIG. 1, a power shovel body
A front and rear movable arm that is articulated on the front of (1)
(2) and (3) can be bent by expansion and contraction of the hydraulic cylinders (4) and (5).

At the front end of the front movable arm (2), an attachment (6) comprising a pair of front and rear rotating pieces (8) (8) is provided.
It is mounted with a pivot (7) pointing left and right.

That is, the movable arm on the pivot (7)
The left and right protruding portions from (3) pivotally support the rear upper ends of a pair of left and right front turning pieces (8) (8) that are long in the front-rear direction. The lower edge of the front turning piece (8) is a contact edge (9) whose central part is concavely formed in an arc shape upward, and the left and right front turning pieces are formed.
(8) The front clamping member (10) is constituted by (8).
The rear portions of the inner surfaces of the left and right front rotating pieces (8) and (8) are connected by a connecting member (11) having a circular cross section, and the front ends of the inner surfaces are also connected by a connecting member (12). The left and right front rotating pieces (8) (8) rotate integrally.

A cutter having a cutting edge (13) formed on the lower edge of the outer surface of the left side (upper side in FIG. 3) of the front rotating piece (8).
(14) is fixed by bolts (15) such that its blade portion (13) projects slightly below the lower edge of the front rotating piece (8). A plurality of projections for preventing falling off are formed on the lower surface of the front end of the contacting edge (9) by welding a steel bar facing in the left-right direction.
(16) are provided side by side in the front-rear direction.

An upward projecting piece (17) provided at the rear of the front rotating piece (8) has a front end of a center-bend link mechanism (18) pivotally connected at its rear end to the front movable arm (2). However, it is pivotally mounted with a pivot (19) facing left and right.

A pivot (22) at an intermediate portion of the folding mechanism (18)
Has a lower end of a piston rod (24) of a hydraulic cylinder (23) whose base end is pivotally connected to an intermediate portion of the front movable arm (2), and a front end of which has a pivot (21). And a rear end of the link (20) pivotally connected to the second arm. The distance between the pivots (21) and (22) of the link (20) is slightly larger than the distance between the pivots (7) and (19).

Front turning pieces at both left and right ends of the pivot (7)
On the outside of (8), a shaft piece (25a) formed at the rear end of a rear turning piece (25) having a downwardly-facing crescent shape is pivotally mounted. The rear rotating piece (25) forms a pair of right and left, and the front and rear portions of the inner side surface thereof are connected by lateral connecting pieces (27) (27) integral with the mounting member (26).

The left rear pivot piece (25) is prevented from falling off to the left by a flange (7a) formed at the left end of the pivot (7), and is fixed to the right rear pivot piece (25). ) Is locked to the right by a nut (7c) which is fastened to a screw (7b) formed at the right end of the pivot (7).

An upward projecting piece (26a) provided at the rear upper end of the mounting member (26) has a piston rod of a hydraulic cylinder (28) whose upper end is pivotally connected to an intermediate portion of the front movable arm (2). The lower end of (29) is pivoted.

The lower edge of the rear turning piece (25) is a contact edge (30) whose central portion is recessed upward in an arc shape, and is formed at the rear end of the contact edge (30). A plurality of protrusions (31) similar to the front rotating piece (8) are fixed, and the left and right rear rotating pieces (25) (25) constitute a rear clamping member (32). I have.

The lower edge of the front end of the inner surface of the left rear turning piece (25) forms a rectangle in side view, and the lower edge is a blade (33).
Is fixed by bolts (35).

The blade portion (33) of the cutter (34) is provided with a rear rotating piece (2).
5) projecting slightly below the contact edge (30), and as the front and rear clamping members (10) and (32) are closed, the blade (33) of the cutter (34) The blade (13) of the cutter (14) attached to the clamping member (10) starts overlapping from the front end, and passes while sliding.

A substantially circular closing plate (37) having a lower edge formed as an arc-shaped closing surface (36) is fixed to the inner surface of the shaft piece (25a) of the rear turning piece (25). I have.

The attachment of the present embodiment described above
According to (6), an object to be cut (W1) such as an iron pipe can be cut in the following manner.

First, the bases of the front and rear clamping members (10) (32) are
With the piston rods (24) and (29) of both hydraulic cylinders (23) and (28) extended in the state as shown in FIG. Pressure member (10) (3
2) is closed, and the object (W1) is sandwiched between the blades (13) and (33) of the cutters (14) and (34) (see FIG. 5).

Next, the piston rods (24) and (29) are further extended, and the blades (14) and (33) of both cutters (14) and (34) are completely passed each other, so that the object to be cut is (W1) is cut.

At this time, as shown in FIG.
4) Since (34) starts to polymerize from the tip sides thereof, when cutting the cut object (W1), the gap between the tip portions of both cutters (14) and (34) is closed, and the cut object (W1) Does not fall out between the tips of the cutters (14, 34). Cutter (14) (34)
Are closed by the closing plate (37), so that the object to be cut (W1) does not escape upward.

According to the cutters (14) and (34) of the present embodiment, in addition to the cut object (W1) such as an iron pipe, an angle material such as an L-shaped steel or a C-shaped steel, a metal plate, or a wooden pillar. Etc. can also be cut.

After many years of use, the rear turning piece (25)
In the case of rattling with respect to (7), it is possible to remove the rattling of the rear turning piece (25) by retightening the bolt (7c).

Also, as described below, the attachment
According to (6), objects to be gripped such as stone, wood, concrete pieces, etc.
(W2) can be gripped between the front and rear clamping members (10) and (32).

First, as shown in FIG.
With (6) greatly expanded in the front-rear direction, the attachment (6) is brought close to the object to be gripped (W2), and the two pressure members (10) (32)
Are positioned before and after the object to be grasped (W2).

In this state, the piston rods (24) and (29) of both hydraulic cylinders (23) and (28) are extended, and as shown by phantom lines in FIG. If the projections (17) and (31) are pressed against the front and rear surfaces of the object to be gripped (W2), the object to be gripped (W2)
It can be gripped between the clamping members (10) and (32).

The distance between the pivots (21) and (22) of the link (20) pivotally attached to the movable arm (3) in the center-bend link mechanism (18) is determined by the distance between the pivots (7) and (19). Since the distance is larger than the interval, the front clamping member (10) can be largely rotated without extending the hydraulic cylinder (23) significantly.

[0032]

According to the present invention, the following effects can be obtained. (a) According to the first aspect of the present invention, the two blades are connected to each other with an object to be cut such as an iron pipe, an angle member, a metal plate or a wooden pillar sandwiched between the two blades. The object to be cut can be cut easily and safely by superimposing and sliding. However, at this time, since the two blades start polymerization from the front end side, the object to be cut does not fall out from between the two blades. In addition, an object to be gripped such as a piece of wood, stone, or concrete can be reliably gripped.

(B) According to the second aspect of the present invention, since the base between the two blades is closed by the closing plate, the cut-off side is prevented from coming off from the base of the blade. You.

[Brief description of the drawings]

FIG. 1 is a side view of a power shovel including an attachment according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional side view of the attachment.

FIG. 3 is a bottom view of the attachment of FIG. 2;

FIG. 4 is a side view showing a use state of the attachment.

FIG. 5 is a side view showing a state where an object to be cut such as an iron pipe is cut by the attachment.

[Explanation of symbols]

 (1) Power shovel body (2) (3) Movable arm (4) (5) Hydraulic cylinder (6) Attachment (7) Axis (7a) Flange (7b) Screw (7c) Nut (8) Front rotation Piece (9) abutment edge (10) front clamping member (11) (12) connecting member (13) blade (14) cutter (15) bolt (16) protrusion (17) upward projecting piece (18) Center bending link mechanism (19) Axis (20) Link (21) (22) Axis (23) Hydraulic cylinder (24) Piston rod (25) Rear turning piece (25a) Shaft piece (26) Mounting member (26a) Upward projecting piece (27) Connecting piece (28) Hydraulic cylinder (29) Piston rod (30) Contact edge (31) Projection (32) Rear clamping member (33) Blade (34) Cutter (35) Bolt (36) Closed surface (37) Closed plate (W1) Workpiece (W2) Workpiece

Claims (2)

[Claims] 1. An attachment attached to a front end of a movable arm of a power shovel, wherein a pair of front and rear clamping members are pivotally attached to the front end of the movable arm so as to be openable and closable, and opposing edges of both clamping members. When the clamping member is closed, each of the blades cuts an object to be cut by overlapping and slidingly contacting each other,
An attachment for a movable arm of a power shovel, which is provided so as to start polymerization from its front end. 2. The movable arm for a power shovel according to claim 1, wherein a closing plate is provided at a pivot portion of the pair of front and rear pressure members to close a gap between rear ends of both blade portions. attachment.