JPH0410974Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement technique for a cutter attachment used as an attachment working machine for a power shovel.

(Prior Art) This type of cutter attachment is mainly used for cutting reinforcing bars, angle-shaped steel, etc. in the cutting process of scrapped cars and in the demolition of construction and structures.

As a conventional cutter attachment, for example, as shown in FIG.
A so-called double-sided cutter structure in which the cutter 1 is rotatably provided is known.

The movable cutter 10 supports the workpiece C in an erected state between the two fixed cutters 100, 100.
1, and the object to be cut C was fixed and cut at the same time.

(Problem to be solved by the invention) However, with this conventional cutter attachment, both fixed cutters
When the interval between 00 and 100 increases, for example, when the object C to be cut is flexible or thin,
This is the fixed cutter 100,1 as shown in the drawing.
00 and the movable cutter 101 may be caught uncut.

In this case, since the conventional cutter has a double-sided structure, both sides of the movable cutter 101 are pressed between the fixed cutters 100 and 100 via the object C, and as a result, the movable cutter 101 becomes immobile. However, in order to release this, there was a problem in that a great deal of effort was required, such as removing the object to be cut by gas cutting or forcibly widening the gap between the fixed cutters 100, 100 using a jack or the like.

Additionally, in the past, the workpiece was fixed and cut at the same time, so once the workpiece was cut,
The problem is that the cut pieces lose their fixation and fall, making noise and being dangerous.

(Means for Solving the Problems) The present invention was made to solve the problems of the conventional methods as described above, and for this purpose, the present invention uses a cutter attachment that is attached to the end of the arm of a power shovel. a frame rotatably pivoted to the tip of the arm; a forked fixed receiving arm integrally formed with the frame; and a frame rotatable between the fixed receiving arms. a movable presser arm pivotably attached to the frame; a fixed cutter formed on the outer surface of one of the fixed receiving arms; A movable cutter attached thereto, and the movable presser arm and the movable cutter are configured to operate independently.

(Function) In the cutter attachment of this invention, first,
The object to be cut is fixed with the forked fixed receiving arm and the movable presser arm provided between the two fixed receiving arms, and then, in this fixed state, the workpiece is attached to the outer surface of one of the fixed receiving arms. The object to be cut is cut by the formed fixed cutter and the movable cutter provided along the fixed cutter.

Therefore, the object to be cut is placed between the two forked fixed receiving arms, and its center part is held down by the movable presser arm, so that it is firmly fixed by a total of three arms. Since the cutter is cut with both cutters in the fixed state, there is no vibration during cutting, and stable cutting can be performed.If the cut part is fixed with the movable presser arm and the fixed receiving arm, I have never had a case where the pieces fell off after cutting.

Furthermore, since the movable cutter is a so-called single-sided cutter with an open outer surface, even if the object to be cut is sandwiched between the fixed cutters, it will only be pinched and pressed by one side of the movable cutter. This makes the removal process much easier.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

The cutter attachment A of this embodiment is attached to a power shovel 1, and includes a frame 2,
The main components are fixed receiving arms 3, 4, movable presser arm 5, fixed cutter 6, and movable cutter 7.

The power shovel 1 has a crawler loading device 1.
A swivel base 12 is supported on the swivel base 12, a cabin 13, an engine 14, etc. are disposed on the swivel base 12, and a main arm 16 is provided at the tip of the swivel base 12 to rotate in the vertical direction by a hydraulic cylinder 15. A cutter attachment A is attached to the tip of the main arm 16, and a bracket 17 whose base end is provided on the main arm 16 is attached to the main arm 16.
A hydraulic cylinder 19 is provided which is pivotally attached to the main arm 16 and whose tip is rotatably connected to the tip of the main arm 16 via a strap 18.

The frame 2 is formed to have a length corresponding to the intermediate arm of the power shovel 1, and a bracket 21 is fixed to the rear surface of the base end.
1 to the tip of the main arm 16, and is also connected to the tip of the hydraulic cylinder 19 via a push rod 22, and when the hydraulic cylinder 19 operates, it rotates vertically about the pivot 23. do.

The fixed receiving arms 3 and 4 extend in a bifurcated manner from the distal end of the frame 2 so as to face each other at a constant distance, and their inward surfaces are formed as receiving surfaces 31 and 41.

The movable presser arm 5 includes both fixed receiving arms 3 and 4.
The middle part is pivotally attached to the tip of the frame 2 by a pin 8, the base end is connected to the tip of a hydraulic cylinder 51 pivotally attached to the frame 2, and the tip part The inward facing surface is the presser surface 52.
At the same time, the tip thereof is bent inward to form a recess 53 in the middle of the holding surface 52, and by the operation of the hydraulic cylinder 51, both fixed receiving arms 3 and 4 are moved around the pin 8. The fixed receiving arms 3 and 4 are opened and closed in between.

Next, the fixed cutter 6 is attached to the fixed receiving arm 3,
4, and a cutter blade 61 is fixed along the inner edge of the outer surface of the fixed receiving arm 3.

The movable cutter 7 is rotatably provided along the fixed cutter 6, and is attached to a common pin 8 as a pivot for the movable presser arm 5.
The middle part is pivotally attached to the distal end of the frame 2, and the base end is connected to the distal ends of two parallel hydraulic cylinders 71, 71 pivotally attached to the frame 2, and the outer surface side is open and the distal end It is formed into a so-called single-sided cutter with a cutter blade 72 fixed along the inner edge of the inner surface thereof, and is opened and closed with respect to the fixed cutter 6 around the pin 8 by the operation of the hydraulic cylinders 71, 71.

Next, the operation of this embodiment will be explained.

When using the cutter attachment A of this embodiment, the movable presser arm 5 and the movable cutter 7 are
are opened by hydraulic cylinders 51 and 71, respectively, and the workpiece B is inserted into the opened portion.

First, the hydraulic cylinder 51 is actuated to close the movable presser arm 5, and the fixed receiving arms 3 and 4 and the movable presser arm 5 are fixed in a state where the object B is gripped.

Next, after fixing the workpiece B as described above, the hydraulic cylinders 71, 71 are operated to close the movable cutter 7, and the workpiece B is cut between it and the fixed cutter 6. Then, the movable presser arm 5 and the movable cutter 7 are opened as before, and the next cutting operation is performed in the same manner as described above.

Therefore, during this cutting operation, the object to be cut B
The fixing and cutting are performed in separate operations, and in this case, the object to be cut B is suspended on both fixed receiving arms 3 and 4, and its center is held down by the movable presser arm 5, so that the total It is firmly fixed by the three arms 3, 4, and 5, and it is possible to prevent the workpiece B from swinging during cutting, thereby allowing stable cutting work.

In particular, in this embodiment, the presser surface 5 of the movable presser arm 5
Since the concave portion 53 is formed in 2, it is possible to prevent the workpiece B from escaping in the distal direction between the movable presser arm 5 and the fixed receiving arms 3 and 4 during cutting. When cutting, they can be fixed together, making it possible to fix them even more firmly.

In addition, when cutting a cantilevered object, if the end of the object to be cut is fixed with the movable presser arm 5 and the fixed receiving arms 3 and 4, the cut end after cutting is The cut piece remains gripped by the movable presser arm 5 and the fixed receiving arms 3 and 4, thereby preventing the cut piece from falling suddenly.

Furthermore, when cutting a thin object, even if the object is sandwiched between the movable cutter 7 and the fixed cutter 6 without being cut, the movable cutter 7 is a single-sided cutter, so The clamping pressure part is only on one side of the movable cutter 7, and the release operation can be performed relatively easily.

Although the embodiments of the present invention have been explained above with reference to the drawings, the specific configuration of the present invention is not limited to the above-described embodiments, and the present invention may be modified without departing from the gist of the invention. included in the technical scope of the invention.

For example, in the embodiment, a cutter attachment is attached to the tip of the main arm of a power shovel, but an intermediate arm is provided at the tip of the main arm, and a cutter attachment is attached to the tip of the intermediate arm. In this case,
The length of the cutter attachment frame can be shortened.

(Effects of the invention) As explained above, in the cutter attachment of the present invention, the fixing part and the cutting part for the object to be cut are provided separately, so that when the object to be cut is fixed, This allows you to perform cutting work stably, and if you fix the part that will become the cut piece, you can keep your grip on the cut piece even after cutting, which prevents the cut piece from falling suddenly. can prevent noise and danger caused by

In addition, since the movable cutter is a so-called single-sided cutter with its outer side open, even if an object to be cut is sandwiched between it and the fixed cutter, the clamping pressure will only be on one side, which is different from the conventional double-sided cutter structure. This has the effect that the clamping pressure is halved compared to the previous one, making the release work easier.

[Brief explanation of the drawing]

Fig. 1 is a left side view showing a cutter attachment according to an embodiment of the present invention, Fig. 2 is a right side view of the cutter attachment, and Fig. 3 is a perspective view of the main parts of the cutter attachment. 4 is a front view of the cutter attachment, and FIG. 5 is a side view of the power shovel equipped with the cutter attachment.
FIG. 6 is an explanatory diagram of a conventional structure. A...Cutter attachment, 1...Power shovel, 16...Main arm (arm), 2...
Frame, 3, 4... fixed receiving arm, 5... movable presser arm, 6... fixed cutter, 7... movable cutter.

Claims (1)

[Claims for Utility Model Registration] A cutter attachment that is attached to the tip of an arm of a power shovel, comprising: a frame rotatably pivoted to the tip of the arm; and a cutter attachment that is integrally formed with the frame. a forked fixed receiving arm; a movable presser arm rotatably pivoted to the frame between the fixed receiving arms; a fixed cutter formed on the outer surface of one of the fixed receiving arms; a movable cutter whose outer surface side is open and which is pivotally attached to a frame so as to be rotatable along the fixed cutter, and the movable presser arm and the movable cutter each operate independently. A cutter attachment for a power shovel characterized by the following: