JP3801706B2 - Crushing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a crusher that is mounted on a construction vehicle such as a hydraulic power shovel and performs crushing, cutting, and demolition of a structure such as reinforced concrete in a structure demolition work or the like.
[0002]
[Prior art]
In a crusher that crushes concrete structures, etc., the middle part of a pair of crushing arms for crushing the object to be crushed by pressure is supported rotatably by the main frame, and between the rear ends of the pair of crushing arms 4 and a hydraulic cylinder for operating the crushing arm, as shown in FIG. 4, a single crushing arm 3 is rotatably supported by the main frame 2, and the crushing arm is interposed between the crushing arm 3 and the main frame 2. There is a type in which a hydraulic cylinder 5 for operation is attached and the front side of the main frame 2 facing the crushing arm 3 is the other crushing arm 23.
[0003]
This crusher is provided with a mounting bracket 1 for a construction vehicle at the base end portion of the main frame 2, which is attached to the boom of the construction vehicle, and from the hydraulic system of the construction vehicle to the hydraulic cylinder 5 for operating the crushing arm. The hydraulic pipe 5 is expanded and contracted by rotating the crushing arm 3 and the object to be crushed 10 is crushed by pressing and crushing. A replaceable single-sheet cutter 11 is attached to each of the cutting portions of the crushing arms 3 and 23 facing each other.
[0004]
In such a crusher, there is a case where the object to be crushed 10 escapes and cannot be effectively crushed during a cutting operation with a large opening. Therefore, in order to prevent the object to be crushed 10 from escaping, the cutting blade surface 11C of the single-sheet cutter 11 provided with irregularities is used so that the object to be crushed 10 can be easily bitten into the cutter 11.
[0005]
[Problems to be solved by the invention]
The cutter 11 is not uniformly used as a whole, the portion that starts to cut into the object to be crushed is severely worn, and the other portions are relatively little worn. However, a single-sheet cutter is uneconomical because the entire cutter must be replaced just by causing local wear. Moreover, since the cutter 11 is formed of a single plate, the weight is large and the replacement work is difficult. In addition, if the cutting blade surface 11C of the cutter 11 is made uneven, the shape of the cutter 11 becomes complicated, resulting in an increase in manufacturing cost.
[0006]
The present invention solves such a problem in the crusher, can reduce the overall replacement frequency of the cutter, facilitates the replacement operation of the cutter, and simplifies the shape of the cutter member and reduces the production cost. An object of the present invention is to provide an economical crusher that is inexpensive and can form irregularities on the cutting blade surface of a cutter so that the object to be crushed is difficult to escape.
[0007]
[Means for Solving the Problems]
The present invention relates to a crusher for crushing and crushing an object to be crushed with a crushing arm, wherein one crushing arm or both crushing arms is provided with a cutter comprising a plurality of individually replaceable circular cutter elements , and the circular cutter is provided . A plurality of mounting holes are arranged at predetermined intervals on a circle concentric with the periphery of the element .
[0008]
Since the cutter is composed of a plurality of circular cutter elements, if local wear occurs, if only the worn circular cutter elements are replaced, good sharpness can be maintained and overall replacement is reduced. it can. Since the circular cutter element is small and light, it can be easily replaced.
[0009]
Moreover, since the cutter is composed of a plurality of circular cutter elements, it is possible to form irregularities on the cutting blade surface so that the object to be crushed is difficult to escape. Here, since each circular cutter element has a simple shape, it is easy to manufacture and the manufacturing cost is low.
[0010]
Since the circular cutter element has a plurality of mounting holes arranged at a predetermined interval on a circle concentric with the peripheral edge, if the mounting hole is shifted and replaced, the peripheral edge can be used as a cutting blade surface many times. The replacement frequency can be further reduced.
[0011]
If the circular cutter element is provided with two front and back cutting blade surfaces, the circular cutter element can be turned over and reused when worn.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a front view of a crushing arm open state of a crusher according to an embodiment of the present invention, FIG. 2 is a front view of a crushing arm half-open state of the crusher, and FIG. 3 is a front view of a crushing arm closed state of the crusher. It is.
[0013]
Here, the crushing arm 3 is rotatably supported on the main frame 2 by a pin 4, and a hydraulic cylinder 5 for crushing arm operation is provided between the main frame 2 and the crushing arm 3. Installed in. The front end side of the main frame 2 facing the crushing arm 3 is the other crushing arm 23.
[0014]
This crusher is provided with a mounting bracket 1 for a construction vehicle at the base end portion of the main frame 2, which is attached to the boom of the construction vehicle, and from the hydraulic system of the construction vehicle to the hydraulic cylinder 5 for operating the crushing arm. The hydraulic pipe 5 is expanded and contracted by rotating the crushing arm 3 and the object to be crushed 10 is crushed by pressing and crushing. The mounting bracket 1 includes a turning portion 9 and can turn the main frame 2.
[0015]
Cutters 8 composed of four circular cutter elements 12 are attached to the cutting portions of the crushing arms 3 and 23 facing each other. Each circular cutter element 12 is provided with a mounting hole 13, and the crushing arms 3 and 23 can be individually attached and detached with bolts or the like.
[0016]
The mounting holes 13 of the circular cutter element 12 are four and are arranged at equal intervals on a circle concentric with the peripheral edge of the circular cutter element 12. If the mounting hole 13 is shifted and replaced, the peripheral edge Can be used as a cutting blade surface for 4 degrees. The number of the mounting holes 13 is not limited to four, and can be selected as appropriate, such as 2, 3, 6 and so on.
The circular cutter element 12 is provided with two front and back cutting blade surfaces, which can be turned over and reused when the circular cutter element is worn.
[0017]
When the crushing operation is performed, when the operator switches the control valve of the hydraulic system of the construction vehicle from the open state in FIG. 1, the pressure oil is supplied to the hydraulic cylinder 5 and the hydraulic cylinder 5 starts to expand. When the crushing arm 3 rotates counterclockwise about the pin 4 and the cutter 8 of the crushing arms 3 and 23 bites the material to be crushed 10 and the hydraulic cylinder 5 further extends as shown in FIG. 8 is brought into a closed state as shown in FIG. 3, and the object to be crushed 10 is crushed under pressure. After crushing, the hydraulic cylinder 5 is shortened and returned to the open state of FIG.
[0018]
In this crusher, the cutter 8 is composed of a circular cutter element 12, and the arcuate chevron is continuous on the cutting blade surface 8 </ b> C of the cutter 8, so that the object 10 to be crushed regardless of the opening width of the arms 3 and 23. Since the concave and convex portions are formed so that contact points that do not easily escape are formed, the cutter 8 can easily bite the object to be crushed 10 and can be crushed effectively.
[0019]
In addition, when the object to be crushed 10 is elongated like a reinforcing bar, and this is bundled and cut, the arc chevron of the circular cutter element 12 disperses the object to be crushed 10 for easy cutting. To do.
[0020]
Here, since each circular cutter element 12 has a simple shape of a circle, it is easy to manufacture and the manufacturing cost is low.
In the cutter 8, the circular cutter element 12 at the part where the cutter 8 starts to cut is severely worn, and the other parts are relatively little worn. When such local wear occurs, the cutter 8 first shifts the mounting hole 13 of the worn circular cutter element 12 and fixes the other mounting hole 13 according to the mounting position of the crushing arm 3. By changing in this way, the part of the peripheral edge of the circular cutter element 12 which is not worn is newly used as the cutting blade surface 8C.
[0021]
When the entire periphery of the circular cutter element 12 is worn by repeating this, the front and back of the circular cutter element 12 are reversed and used. When the front and back edges are all worn, the circular cutter element 12 is replaced.
[0022]
If there is wear of the circular cutter element 12 in other parts, the circular cutter element 12 is replaced, inverted, or replaced as necessary.
In this manner, the cutter 8 can always maintain a good sharpness by reducing the replacement frequency. Since the circular cutter element 12 is small and light, it can be easily replaced.
[0023]
【The invention's effect】
As described above, the crusher of the present invention can maintain a good sharpness by replacing only the worn part of the cutter element when the cutter is locally worn, and the entire cutter is replaced. The frequency of consumable parts can be reduced by reducing the frequency. Since the circular cutter element is small and light, it can be easily replaced.
[0024]
Moreover, since the cutter is composed of a plurality of circular cutter elements, it is possible to form irregularities on the cutting blade surface so that the object to be crushed is difficult to escape. Here, since each circular cutter element has a simple shape, it is easy to manufacture and the manufacturing cost is low.
[0025]
Since the circular cutter element has a plurality of mounting holes arranged at a predetermined interval on a circle concentric with the peripheral edge, if the mounting hole is shifted and replaced, the peripheral edge can be used as a cutting blade surface many times. The replacement frequency can be further reduced.
[Brief description of the drawings]
FIG. 1 is a front view of a crushing arm opening state of a crusher showing an embodiment of the present invention.
FIG. 2 is a front view showing a crushing arm half-opened state of the crusher.
FIG. 3 is a front view of the crusher with the crushing arm closed.
FIG. 4 is a front view of a conventional crusher.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mounting bracket 2 Main frame 3 Crushing arm 4 Pin 5 Hydraulic cylinder 6 Pin 7 Pin 8 Cutter 9 Turning part 10 Object to be crushed 12 Circular cutter element 13 Mounting hole 23 Crushing arm

Claims (2)

A crushing machine that crushes objects to be crushed with a crushing arm, the crushing arm is provided with a cutter comprising a plurality of circular cutter elements that can be individually replaced , and the circular cutter element has a circle concentric with the periphery thereof. A crusher characterized in that a plurality of mounting holes are arranged at predetermined intervals on the top . Crushing machine according to claim 1 Symbol mounting, characterized in that the circular cutter element having a cutting edge surface of the front and rear two surfaces.

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