JP3182688B2 - Crushing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a crusher attached to the tip of an arm of a construction machine and used for crushing a concrete wall or the like of a structure.

[0002]

2. Description of the Related Art Conventionally, as this type of crusher, for example, there is a crusher B as shown in FIG. This crusher B
Is provided with a movable part 30 and a fixed part 40, and the movable part 30 is configured to be opened and closed by a hydraulic cylinder 31. A projection claw portion 32 is formed at the tip of the movable portion 30, and three crushing teeth 33, 34,
35 are provided. The crushing teeth 33, 34, 35 are formed in a narrow pyramid shape like the tip of a flathead screwdriver. The mounting direction of the crushing teeth 33, 34, 35 is parallel to the longitudinal direction of the movable part 30. It is attached to become. On the other hand, the fixed portion 40 has a claw portion 41 formed at the tip, and the crushing teeth 33, 34, 35
The crushing surface opposing to is a flat portion 42 formed flat.

The crusher B constructed as described above is attached to the tip of an arm of a construction machine such as a backhoe (not shown), and is used for dismantling a reinforced concrete building to crush concrete C or the like. FIG. 7 shows the state of the crushing of the concrete C. In the same figure, when pressure is applied to the concrete C sandwiched between the movable part 30 and the fixed part 40 by the hydraulic cylinder 31,
Since the crushing teeth 33, 34, and 35 receive a concentrated load from the distal end, cracks gradually occur, and when the load is further applied, the concrete C is finally crushed.

[0004]

However, in the above-mentioned conventional crushing machine B, when the concrete C is subjected to a compressive load for crushing by the crushing teeth 33, 34, 35, the fixing portion for receiving the concrete C is used. Since the flat portion 42 of 40 is formed flat, the stress received by the concrete C is mechanically a compressive stress, and the concrete C exhibits an extremely strong property against the compressive stress. In order to achieve this, it is necessary to apply a large load for a long time, so that there is a problem that the large concrete C cannot be crushed and the working efficiency is poor. Further, in order to increase the working efficiency, it is necessary to increase the compressive load of the crusher B. For that purpose, it is necessary to increase the size of the hydraulic cylinder or the hydraulic pressure to increase the pressure resistance of the hose. However, the size of the device also becomes large, causing a problem of increasing the cost.

The present invention has been made in view of the above-mentioned problems of the conventional crusher, and has as its object to provide a crusher having a structure of a fixed portion and a movable portion which can easily crush concrete concretely.

[0006]

In order to solve the above-mentioned problems, the present invention provides a crusher provided with a movable part and a fixed part which are opened and closed by a hydraulic cylinder. In addition, at least three chevron-shaped crushing teeth having a straight portion formed at the tip are provided, and the crushing teeth are attached in such a direction that the directions of the straight portions intersect at one point . Et al is in crusher a fixed portion and the movable portion is provided so as to open and close by a hydraulic cylinder, the crushing surface of the movable portion, fracturing teeth chevron shaped linear portion is formed at the tip of at least three provided, said crushing teeth mounted et is in a direction such as the direction of the straight portion intersect at one point, crushing surfaces of the fixing unit is for a central portion is formed in a V-shaped recessed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an outline of a construction machine equipped with a crusher according to the present invention, FIG. 2 is a perspective view showing a crusher according to the present invention, and FIG. 3 is crushing of concrete by the crusher of FIG. FIG. 4 is a plan view illustrating crushing of concrete by the crusher of FIG. 2, and FIG.
It is a top view explaining crushing of concrete by the crusher provided with four crushing teeth. The same parts as those in the conventional example are denoted by the same reference numerals, and detailed description will be omitted.

A crusher A according to the present invention is attached to the tip of an arm 2 of a construction machine 1 such as a backhoe, as shown in FIG.
Is operated to dismantle concrete structures and the like.

Further, as shown in FIG. 2, the crusher A comprises a movable part 10 which is opened and closed by a hydraulic cylinder 4, and a fixed part 20 formed integrally with the outer casing 5. Movable part 1
Reference numeral 0 denotes a crushing surface which is rotatably supported by a pin 11 attached to the outer casing 5 and has a protruding claw portion 12 for gripping concrete or the like at a tip end thereof. Are formed with three crushing teeth 13, 14, 15. The shape of the crushing teeth 13, 14, 15 is a narrow linear portion 13 a, 1 such as the tip of a flathead screwdriver.
4a, 15a, and the mounting angle of the linear portions 13a, 14a, 15a is such that the extension of the three linear portions 13a, 14a, 15a is the movable portion 10 as shown in FIG. At the center point P at the approximate center.

On the other hand, as shown in FIG.
The movable part 1 is supported so that the movable part 10 can be supported by the pin 11.
It is formed wider than 0, a claw portion 21 is provided at the tip,
As shown in FIG. 3, the crushing surface 22 facing the movable portion 10 is formed in a V-shape with a concave portion near the center. Therefore, when the concrete C is crushed,
Concrete C supported on the end portion 2 of the fixed portion 20
It becomes supported only by 3 and 24, and mechanically becomes the same conditions as a double-supported beam.

The crusher A thus constructed is mounted on the arm 2 of the construction machine 1 through the mounting holes 6 and 7 of the outer casing 5 as shown in FIG. Not hydraulic hose is connected. When hydraulic oil is supplied from the hydraulic device 3 to the hydraulic cylinder 4,
The movable part 10 is closed and the disassembled concrete C is sandwiched between the movable part 10 and the fixed part 20, and the concrete C can be crushed by being compressed.

The operation and operation when crushing concrete C with the crushing machine A having the above-described structure will be described with reference to FIGS.
It will be described based on. First, as shown in FIG.
0, and is compressed by the hydraulic cylinder 4 (FIG. 1). Then, since the stress applied to the concrete C becomes the same as that of the double-supported beam, a compressive stress is applied to the upper surface side of the concrete C and a tensile stress is applied to the lower surface side. As a result, the concrete C has a fracture surface X,
Y and Z are formed and easily destroyed.

Further, as shown in FIG.
Since the directions of the straight portions 13a, 14a, and 15a at the tips of the tips 14 and 15 are configured to be concentrated at one point of the center point P, the fracture surfaces X, Y, and Z generated in the concrete C are also concentrated at the center point P. Since the concrete C is broken along the fracture planes X, Y, and Z, the concrete C can be largely divided. According to the above-described embodiment, the crushing can be performed with a load of approximately 以下 or less as compared with the related art, and the operation time can be greatly reduced.

The movable portion 10 'shown in FIG. 5 is provided with four crushing teeth 16, 17, 18, and 19, and a straight line at the tip of the four crushing teeth 16, 17, 18, 19 is provided. The direction of the portion is configured to be concentrated at the center point Q.
The crusher provided with the four crushing teeth can make the concrete C finer than the crusher provided with the three crushing teeth.

Further, it is needless to say that a crusher having five or more crushing teeth can exert the same effect. As described above, the crushing machine according to the present invention exerts the respective effects even when the movable part and the fixed part are separately used, but exerts a tremendous effect by combining the movable part and the fixed part. .

[0016]

As described above, according to the present invention, in a crusher provided with a movable part and a fixed part which are opened and closed by a hydraulic cylinder, a linear part is formed at the tip of the crushing surface of the movable part. At least three crushed teeth having a chevron shape are provided, and the crushed teeth are attached in such a direction that the directions of the straight portions intersect at one point, so that the fracture surface generated in the crushed concrete also intersects at one point. Therefore, concrete breaks easily from the fracture surface, so that concrete can be divided not only into small portions but also into large portions, and efficient crushing work can be performed.

[0017]

Further, in a crusher provided so that the movable portion and the fixed portion can be opened and closed by a hydraulic cylinder, at least three chevron-shaped crushing teeth having a straight portion formed at the tip are provided on the crushing surface of the movable portion. this is provided, wherein the fracturing teeth are attached, et al is in a direction such as the direction of the straight portion intersect at one point, crushing surface of the fixed portion, by a central portion is formed in a V-shaped recessed, disrupted Since the fracture surface generated in the large part of the concrete also intersects at one point, the concrete can be largely divided at this fracture surface, and the large part of the concrete is the same as the doubly supported beam supported at both ends of the fixed part. Stress is applied to the concrete, and the lower surface of the concrete is easily broken by a tensile stress. Door can be.

[Brief description of the drawings]

FIG. 1 is a side view showing an outline of a construction machine equipped with a crusher according to the present invention.

FIG. 2 is a perspective view showing a crusher according to the present invention.

FIG. 3 is a sectional view illustrating crushing of concrete by the crusher of FIG. 2;

FIG. 4 is a plan view illustrating crushing of concrete by the crusher of FIG. 2;

FIG. 5 is a plan view illustrating crushing of concrete by a crusher having four crushing teeth.

FIG. 6 is a perspective view showing a conventional crusher.

FIG. 7 is an explanatory diagram illustrating crushing of concrete by a conventional crusher.

[Explanation of symbols]

 Reference Signs List A Crusher C Concrete P Center point X Breaking surface Y Breaking surface Z Breaking surface 1 Construction machine 2 Arm 3 Hydraulic device 4 Hydraulic cylinder 5 Outer casing 10 Movable part 10 'Movable part 11 Pin 12 Projection claw part 13 Crushing tooth 13a Straight part 14 Crushed tooth 14a Straight portion 15 Crushed tooth 15a Linear portion 16 Crushed tooth 17 Crushed tooth 18 Crushed tooth 19 Crushed tooth 20 Fixed portion 21 Claw 22 Crushed surface 23 End 24 End

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B02C 1/02-1/10 E04G 23/08

Claims (2)

(57) [Claims] 1. A crusher provided so that a movable portion and a fixed portion can be opened and closed by a hydraulic cylinder. A crushing surface of the movable portion has at least three chevron-shaped crushing teeth having a straight portion formed at a tip. The crushing machine according to claim 1, wherein the crushing teeth are provided in such a manner that the directions of the straight portions intersect at one point. 2. The movable part and the fixed part are opened and closed by a hydraulic cylinder.
In the crusher provided so that the straight portion is formed at the tip on the crushing surface of the movable portion
At least three crushing teeth having the same shape are provided;
Is installed so that the direction of the straight line crosses at one point
Is crushing surface of the fixing portion is formed of a central portion is recessed V-shaped
A crusher characterized by being crushed.