JP2004143683A - Structure crusher and crushing edge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure crusher and crushing edges capable of positively clamping and crushing a concrete structure. <P>SOLUTION: Tip crushing claws 2a for crushing a crushed object are oppositely disposed at tips of arms 2, and the crushing edges 2d for crushing the crushed object are disposed from the tip crushing claws 2a toward rear end sides of the arms 2. The tip crushing claws 2a thereby act to bite into the side face of the concrete structure and to vertically tear it off, and the crushing edges 2d act to abut in dots or lines against the corner of the concrete structure to drive wedges, to bite in and to laterally tear it off. Cracks are thereby generated easily and grown at both corners of the concrete structure by the crushing edges 2d, and cracks generated in the side faces of the concrete structure by the tip crushing claws 2a can be easily grown to surely crush the concrete structure small. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a building crusher and a crushing blade for crushing a building by driving a pair of arms pivotally supported by an arm support consisting of two side plates with a hydraulic cylinder.
[0002]
[Prior art]
Conventionally, in the demolition work of existing buildings accompanying construction work, when crushing and removing concrete buildings, means such as destruction by hydraulic breaker type rock drills have been used, but with these construction methods, severe noise There are various drawbacks, such as causing pollution problems due to vibration and vibration, or involving danger. Therefore, in recent years, a construction method of attaching and using a building crusher of a type that crushes a building by pressing it with oil pressure or the like as an attachment of a working machine such as a power shovel has been widely adopted.
[0003]
By the way, in the construction method using this building crusher, in the work of dismantling the reinforced concrete structure, a large-scale work of breaking the concrete structure, and furthermore, in the state of being destroyed, the concrete fragments are too large and hinder the carrying out work. Since it cannot be reused together with the above, it is necessary to perform a small work for finely crushing concrete fragments generated after the fracture.
[0004]
That is, as shown in FIG. 14, first, the walls, floors, columns, beams, etc. of the concrete structure S to be dismantled are broken down using the crushing machine 80 and dropped on the ground. Next, concrete pieces and steel bars are separated while the fallen block chunks are finely crushed into small pieces P each having a size of about 20 cm or less using a small crusher 70. The separated reinforcing bars and the like are put together, loaded into a transport vehicle, carried out, and treated as, for example, industrial waste. In addition, the small pieces P that have been finely crushed are, for example, laid at a dismantling site and reused.
[0005]
In general, the crushing machine 80 for crushing is provided with crushing claws at the end of the arm for compressing and crushing the concrete structure, and near the pivot point in the middle of the arm, when the concrete of the reinforced concrete structure is crushed by the crushing claws. A building crusher equipped with a shearing blade for cutting a reinforcing steel bar, a steel frame, or the like is used. On the other hand, as the small crusher 70, a building crusher whose tip is wider than the pivot portion of the pair of arms to be opened and closed and which is easy to catch the object to be crushed is used. We are doing the work of subdivision.
[0006]
FIG. 15 is a plan view showing the crusher 80 for the large split. In the crusher 80 for large splitting, the rear end is pivotally supported by an arm support 81 composed of two side plates, and the rear end is pivotally mounted on a piston rod 83 of a hydraulic cylinder 82 attached to the arm support 81. It has a pair of arms 84 supported. In each arm 84, a tip crushing claw 85 for crushing a concrete structure is provided at the forefront thereof in opposition, and a shearing blade 86 for cutting a reinforcing steel bar, a steel frame, or the like is provided in the vicinity of the pivot support portion, and is provided opposite thereto. Further, an intermediate crushing claw 87 for crushing the concrete structure is disposed between the tip crushing claw 85 and the shearing blade 86 so as to face each other.
[0007]
Then, the rear end side of the arm 84 is driven by the hydraulic cylinder 82 to open and close the front end side of the arm 84, and the concrete structure is pressed and crushed by the front end crushing claw 85 and the intermediate crushing claw 87. It cuts steel frames and the like. That is, as shown in FIGS. 16A and 16B, since the tip crushing claw 85 and the intermediate crushing claw 87 are formed in a substantially quadrangular pyramid wedge shape, these claws 85 and 87 are cut into the concrete structure. The cracks in the concrete structure grow by moving the concrete structure, and the concrete structure is finally crushed (see JP-A-60-233276).
[0008]
[Problems to be solved by the invention]
However, in the crushing machine 80 for a large split, when the opening width of the arm 84 is slightly larger than the width of the concrete structure, that is, as shown in FIG. A problem arises when it does not enter between the crushing claws 87. In this case, when the tip side of the arm 84 is closed, the tip crushing claw 85 cuts into the side surface Cs of the concrete structure C, but at a certain point, the arm portion 84a between the tip crushing claw 85 and the intermediate crushing claw 87 becomes It contacts the corner Cc of the concrete structure C. For this reason, the crushing force of the arm 84 is dispersed without being concentrated on the tip crushing claw 85.
[0009]
The arm portion 84a is formed flat as shown in the BB cross-sectional view of FIG. Therefore, since the flat arm portion 84a presses both corners Cc of the concrete structure C, it is difficult for the arm portion 84a to bite into both corners Cc like the tip crushing claw 85. Since the arm portion 84a initially contacts the two corners Cc at a line or a point, the two corners Cc are gradually cut and come into contact with the surface, so that the compressive load of the arm portion 84a does not concentrate. Will be dispersed. In general, concrete is weak and easy to break against tension, but hard to break against compression, so that the closing operation of the arm 84 becomes impossible at some places.
[0010]
As described above, it is difficult to generate a crack at both corners Cc of the concrete structure C by the arm portion 84a, and furthermore, it is impossible to grow a crack in the side surface Cs of the concrete structure C by the crushing tip 85. Therefore, the concrete crushing machine 80 cannot reliably crush the concrete structure C. In this case, a prying operation in which an external force in the opening and closing direction is applied to the arm 84 by shaking the arm or boom or the like of the hydraulic shovel, or an operation in which the arm 84 is reopened and opened to re-bite around a crack generated by the tip crushing claw 85 is repeated. Although there is a method, the work efficiency is poor, and if the arm 84 is pryed in a direction orthogonal to the opening / closing direction, there is a possibility that the large crusher 80 may break down. Therefore, in order to reliably crush the concrete structure C, it is necessary to use a crusher for large-scale crushing provided with a high-output hydraulic cylinder, which causes a problem that the cost is increased.
[0011]
FIG. 18 is a plan view showing another conventional crusher for large splitting in correspondence with FIG. 15, and the same components are denoted by the same reference numerals and description thereof will be omitted. The large crusher 90 has basically the same configuration as the large crusher 80, but the arm portion 94a between the tip crushing claw 85 and the intermediate crushing claw 87 is largely hollowed out in a concave shape. In this point, the configuration is different from that of the crushing machine 80 for large split.
[0012]
According to such a configuration, as shown in FIG. 19, even when the concrete structure C enters between the tip crushing claws 85 but does not enter between the intermediate crushing claws 87, the arm portion 94 a has the concrete structure C. Since the distance that the tip crushing nail 85 cuts into the side surface Cs of the concrete structure C before contacting the corner Cc of the concrete structure C becomes larger than that of the large crusher 80, the possibility of crushing the concrete structure C is improved. Can be.
[0013]
However, even with the crusher 90 for large split, the contact between the arm portion 94a and the corner Cc of the concrete structure C cannot be avoided, so that the possibility of crushing the concrete structure C can be increased. However, the certainty of crushing is not guaranteed. Also, as shown in FIG. 18, since the distance A between the opposed arm portions 94a is large, the size of the crushed concrete block is larger than that of the large crusher 80, so that the concrete block is small. There is a problem that the dividing work becomes difficult.
[0014]
Then, an object of the present invention is to provide a building crusher and a crushing blade capable of reliably crushing and crushing a concrete structure.
[0015]
[Means for Solving the Problems]
To achieve the above object, the structure crusher according to claim 1 has a pair of arms pivotally supported on an arm support, and a tip crushing claw that crushes an object to be crushed at least at the most distal end of the arm. Are arranged facing each other, a building crusher that crushes the crushing object by opening and closing the tip side of the arm with a hydraulic cylinder, wherein a crushing blade for crushing the crushing object, The cutting edge is disposed so as to have a triangular cross section toward the rear end of the arm.
[0016]
According to a second aspect of the present invention, the crushing blade is characterized in that the ridge line of the cutting edge is formed in a concavely curved shape from the front end side to the rear end side of the arm. Further, in the structure crushing machine according to claim 3, in the structure crushing machine according to claim 1 or 2, an intermediate crushing claw for crushing the object to be crushed is disposed substantially at an intermediate portion of the arm so as to face each other. The crushing blade is disposed between the tip crushing claw and the intermediate crushing claw. Alternatively, in the structure crushing machine according to claim 4, in the structure crushing machine according to claim 1 or 2, an intermediate crushing claw for crushing the crushing object is disposed substantially at an intermediate portion of the arm to face the crushing object. The crushing blade is disposed between the tip crushing claw and the intermediate crushing claw in a shape integrated with the intermediate crushing claw. Alternatively, in the structure crushing machine according to claim 5, in the structure crushing machine according to claim 1 or 2, a shearing blade for cutting an object to be cut is disposed near the pivotally supporting portion of the arm so as to face each other. The crushing blade is disposed between the tip crushing claw and the shearing blade in a shape integrated with the intermediate crushing claw.
[0017]
In the structure crusher according to claim 6, in the structure crusher according to any one of claims 1 to 5, the crushing blade is characterized in that a cross section of a cutting edge is formed in a trapezoidal shape. I have. Alternatively, in the structure crusher according to claim 7, in the structure crusher according to any one of claims 1 to 6, the crushing blade is formed integrally with the arm. . Alternatively, in the structure crusher according to claim 8, in the structure crusher according to any one of claims 1 to 6, the crushing blade is formed so as to be detachable from the arm. I have. Alternatively, in the construct crusher according to claim 9, in the construct crusher according to any one of claims 1 to 8, one of the arms is integrated with the arm support. I have. A crushing blade according to a tenth aspect is the crushing blade according to any one of the first to seventh or ninth aspects, wherein the crushing blade is formed so as to be connectable to the arm.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the structure crusher according to the embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a state in which the arm of the building crusher of the present embodiment is closed, FIG. 2 is a perspective view showing a state in which the arm of the building crusher is open, and FIGS. 3 (A) and 3 (B). Is a plan view and a side view of the structure crusher, and FIGS. 4A and 4B are a plan view and a side view of an arm of the structure crusher.
[0019]
As shown in FIGS. 1 to 3, the structure crusher 1 generally includes an arm support 5 including a pair of arms 2, two hydraulic cylinders 3, a working machine bracket 4, and two side plates 5 a. . The pair of arms 2 are formed in a substantially triangular shape and are disposed symmetrically with respect to a line. The inside of the rear end is pivotally supported by the arm support 5 and the outside of the rear end is attached to the arm support 5. The two hydraulic cylinders 3 are pivotally supported by cylinder outer cylinders 3b.
[0020]
As shown in FIGS. 1 to 4, each arm 2 is provided with a tip crushing claw 2 a for crushing a concrete structure at the foremost end thereof, and a reinforcing bar, a steel frame or the like is provided near a pivotally supporting portion of the arm support 5. Is arranged opposite to each other, and an intermediate crushing claw 2c for crushing the concrete structure is provided between the tip crushing claw 2a and the shearing blade 2b so as to face each other. The shearing blade 2b is fastened by bolts so that it can be replaced as needed when damage such as blade spillage occurs. As a characteristic part of the present embodiment, a crushing blade 2d for crushing a concrete structure is disposed between the tip crushing claw 2a and the intermediate crushing claw 2c so as to face each other.
[0021]
This crushing blade 2d has a shape in which the ridgeline of the cutting edge is concavely curved from the front end side to the rear end side of the arm 2 and has a cutting edge like the AA cross section in FIG. Is formed in a triangular shape. The crushing blade 2 d is formed integrally with the arm 2. The cross section of the blade edge of the crushing blade 2d only needs to be formed to an acute angle to some extent, and may be formed in a trapezoidal shape, for example, as in the cross section AA in FIG. 4B shown in FIG. In addition, the crushing blade 2d may be formed as a crescent-shaped unit so that it can be attached to and detached from the arm 2 by, for example, welding or screwing.
[0022]
By providing such a crushing blade 2d between the tip crushing claw 2a and the intermediate crushing claw 2c, the concrete structure C shown in FIGS. Even if it enters between the tip crushing claws 85 but does not enter between the intermediate crushing claws 87, the concrete building C can be crushed without any problem. That is, in the conventional crushing machines 80 and 90 for the splitting, when the tip side of the arm 84 is closed, the tip crushing claw 85 cuts into the side surface Cs of the concrete structure C, but at a certain point, the tip crushing claw 85 Since the arm portions 84a and 94a between the crushing claw 87 and the crushing claw 87 abut on the corner Cc of the concrete structure C, the crushing force of the arm 84 is dispersed without being concentrated on the tip crushing claw 85. At this time, since the flat arm portions 84a and 94a pinch both corners Cc of the concrete structure C, it is difficult for the arm portions 84a and 94a to bite into both corners Cc like the tip crushing claw 85. .
[0023]
Since the arm portions 84a and 94a initially contact the corners Cc at a line or a point, the corners Cc are gradually cut and come into contact with the surfaces, so that the compressive load of the arm portions 84a and 94a is reduced. Have been dispersed without being concentrated, and the closing operation of the arm 84 has become impossible at a certain point. Further, since the distance A (see FIG. 18) between the opposed arm portions 94a of the large crusher 90 is large, the crushed concrete mass is larger than that of the large crusher 80, and In many cases, the fragments and the reinforcing bars are in a state of being connected, so that it has been difficult to divide the concrete mass.
[0024]
However, in the structure crushing machine 1 of the present embodiment, when the distal end side of the arm 2 is closed, the distal end crushing claw 2a acts to bite into the side surface of the concrete structure and peel off vertically, and furthermore, the crushing blade 2d. Works by contacting the corners of the concrete structure with a point or a line as if driving a wedge into the concrete structure and peeling it off from side to side. For this reason, cracks can be easily generated and grown at both corners of the concrete structure by the crushing blade 2d, and cracks in the side of the concrete structure caused by the tip crushing claws 2a can be easily grown. This concrete structure can be reliably crushed into small pieces.
[0025]
Therefore, as in the prior art, the work of shaking the arm or boom of the hydraulic excavator to apply an external force in the opening / closing direction to the arm, or the work of reopening / closing the arm and re-meshing around the crack generated by the tip crushing claw is repeated. This eliminates the necessity, so that the efficiency of the crushing operation can be greatly improved, and the failure of the crusher caused by squeezing the arm in the direction orthogonal to the opening and closing direction can be avoided. Further, it is not necessary to use a crusher having a high-output hydraulic cylinder, and the use of a crusher of a lower class suffices, so that the cost can be reduced.
[0026]
As shown in FIGS. 1 to 3, the two side plates 5 a constituting the arm support 5 are substantially rectangular plate-like members formed integrally with the annular flange 5 b at intervals. The inside of the rear end of each arm 2 is rotatably supported by the lower end of the side plate 5a via a pin 7 that is attached through the side plate 5a. The outside of the rear end of each arm 2 is rotatably supported by a tip of a cylinder outer cylinder 3 b of the hydraulic cylinder 3 via a pin 8.
[0027]
As shown in FIGS. 1 to 3, the work implement bracket 4 has a structure in which stay members 4a are fixed to both ends of an end face of an annular flange 4b, and each of the stay members 4a is joined to an end of an arm of the work implement. Mounting hole 4c is formed. In the working machine bracket 4, an annular flange 4b provided with a stay member 4a is mounted so as to be rotatable around an axis with respect to an annular flange 5b provided with a side plate 5a.
[0028]
As shown in FIG. 3, a cylindrical swivel joint 9 is provided between the stay members 4a of the annular flange 4b, and when oil is fed from one of the pressure oil supply ports, the side oil of the piston rod 3a of the hydraulic cylinder 3 is turned on. Oil is supplied to the chamber, and the retracted cylinder outer cylinder 3b pulls the rear end of the arm 2 to open the arm 2, and the oil in the oil chamber on the side of the piston flows through the other pressure oil supply port to the oil on the working machine side. Returned to the tank. If oil is fed from the other pressure oil supply port, oil is supplied to the oil chamber on the side of the piston of the hydraulic cylinder 3, and the protruding cylinder outer cylinder 3b pushes the outside of the rear end of the arm 2 to close the arm 2, The oil in the oil chamber on the side of the piston rod 3a is returned to the oil tank on the working machine side through one pressure oil supply port.
[0029]
A method of dismantling a reinforced concrete structure using the structure crusher 1 having the above configuration will be described with reference to FIGS. First, as shown in FIG. 7, the building crusher 1 is attached to, for example, a hydraulic excavator 20 via a work implement bracket 4. Then, one of the arms 2 is pressed against the fixed object so that the arm 2 sandwiches the reinforced concrete flat plate 21 constituting the ceiling or the wall at a substantially right angle, and the arm support 5 is pressed against the working machine bracket 4. To rotate and position the arm support 5.
[0030]
In this case, since the weight of the building crusher 1 is symmetrical with respect to the center axis of rotation of the arm support 5, even if the arm 2 is opened in the horizontal direction, it is rotated by the weight of the arm 2 or the like. Since no moment is generated, and even if it is generated, the resistance is smaller than the rotation resistance between the arm support 5 and the work implement bracket 4, the arm support 5 does not rotate and the arm 2 maintains the open posture. be able to.
[0031]
Then, the building crusher 1 is moved, and the reinforced concrete flat plate 21 is pinched by the tip crushing claw 2a of the arm 2 to perform the crushing operation. That is, when the distal end side of the arm 2 is closed, only the distal end crushing claw 2a formed to be bent in a claw shape clamps the reinforced concrete flat plate 21. When the distal end side of the arm 2 is further closed, stress is concentrated on the reinforced concrete flat plate 21 at the contact position of the tip crushing claw 2a, and cracks or cracks are generated from this position. Can be easily crushed. Thereafter, the above-described operation is repeated along one side of the reinforced concrete plate 21 to crush the reinforced concrete plate 21.
[0032]
Thereafter, the exposed reinforcing bar 22 is cut by the shearing blade 2b of the arm 2. In this case, the reinforcing bar 22 running in one side direction for crushing the reinforced concrete flat plate 21 can be cut without changing the posture of the building crusher 1, but the reinforcing bar 22 running in a direction perpendicular to the reinforcing bar is oriented in the direction of the shearing blade 2b ( (The length direction of the cutting blade 2b), the rebar 22 is bent by pressing upward or downward at the tip of the arm 2, and the arm support 5 is rotated with respect to the working machine bracket 4. The arm 2 is cut after the opening and closing direction of the arm 2 matches the direction of the surface of the reinforced concrete flat plate 21. Hereinafter, the above-mentioned work is repeatedly performed, and all the reinforced concrete flat plates 21 are crushed and dismantled.
[0033]
Next, as shown in FIG. 8, the work implement bracket 4 is turned and positioned so that the arm 2 sandwiches the side of the reinforced concrete column 23. The crushing operation is performed by holding the side of the reinforced concrete column 23 between the tip crushing claw 2a and the crushing blade 2d of the arm 2 and, in some cases, the intermediate crushing claw 2c. That is, as shown in FIG. 9, when the tip side of the arm 2 is closed, the tip crushing claw 2a cuts into the side surface 23a of the reinforced concrete column 23 to generate a crack S1 as shown in FIG. Works.
[0034]
When the tip side of the arm 2 is further closed, the crushing blade 2d abuts on the corner 23b of the reinforced concrete column 23 with a point or a line so as to drive a wedge, and generates a crack S2 as shown in FIG. Acts like peeling. As a result, the cracks S1 and S2 generated on the side surfaces 23a and the corner portions 23b of the reinforced concrete column 23 further grow, so that the reinforced concrete column 23 enters between the tip crushing claws 2a but does not enter between the intermediate crushing claws 2c. Even if it does, the reinforced concrete columns 23 can be reliably crushed into small pieces. After crushing the side portion of the reinforced concrete column 23 in this manner, the exposed rebar is cut by the shearing blade 2 b of the arm 2. Hereinafter, the above operation is repeatedly performed, and the reinforced concrete columns 23 are crushed and dismantled.
[0035]
In the above-described embodiment, the arm 2 has a configuration in which the crushing blade 2d for crushing the concrete structure is disposed between the tip crushing claw 2a and the intermediate crushing claw 2c so as to face each other, as shown in FIG. The same effect can also be obtained as the arm 32 having a configuration in which the crushing blade 32d integrated with the intermediate crushing claw 32c is disposed between the tip crushing claw 32a and the intermediate crushing claw 32c. . As shown in FIG. 12, the same applies to the arm 42 having a configuration in which a crushing blade 42d integrated with the intermediate crushing claw 42c is disposed between the tip crushing claw 42a and the shearing blade 2b so as to face each other. The effect can be achieved. Further, in the above-described embodiment, the case where the present invention is applied to the structure crusher 1 in which the arm portion between the tip crushing claw 2a and the intermediate crushing claw 2c is largely hollowed in a concave shape has been described. The present invention can be applied to a construction crusher 51 having a flat arm portion between the tip crushing claw 52a and the intermediate crushing claw 52c as shown.
[0036]
Further, the construction crusher 1 in which the arm 2 includes the tip crushing claw 2a, the intermediate crushing claw 2c, and the shearing blade 2b has been described, but if the arm 2 is provided with at least the tip crushing claw 2a, the intermediate crushing is performed. The present invention can be applied to a building crusher without both or one of the claw 2c and the shearing blade 2b. Further, the structure crusher 1 driven by the two arms 2 has been described. However, the present invention is applicable to a structure crusher in which one arm is integrated with the arm support and only the other arm is driven. Can be.
[0037]
【The invention's effect】
As described above, according to the present invention, when the tip side of the arm is closed, the tip crushing claw acts to bite into the side of the concrete structure and peel off vertically, and further the crushing blade drives the wedge. As described above, the concrete structure comes into contact with the corners of the concrete structure at a point or a line, bites into the concrete structure, and acts to peel off from side to side. For this reason, cracks can be easily generated and grown at both corners of the concrete structure by the crushing blade, and the cracks in the side of the concrete structure due to the crushing tip can be easily grown, so that this concrete The construct can be reliably broken into smaller pieces.
[0038]
Therefore, as in the prior art, the work of shaking the arm or boom of the hydraulic excavator to apply an external force in the opening / closing direction to the arm, or the work of reopening / closing the arm and re-meshing around the crack generated by the tip crushing claw is repeated. This eliminates the necessity, so that the efficiency of the crushing operation can be greatly improved, and the failure of the crusher caused by squeezing the arm in the direction orthogonal to the opening and closing direction can be avoided. Further, it is not necessary to use a crusher having a high-output hydraulic cylinder, and the use of a crusher of a lower class suffices, so that the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which an arm of a building crusher according to an embodiment of the present invention is closed.
FIG. 2 is a perspective view showing a state in which an arm of the building crusher of FIG. 1 is open.
FIG. 3 is a plan view and a side view of the building crusher of FIG. 1;
FIG. 4 is a plan view and a side view of an arm of the building crusher of FIG. 1;
FIG. 5 is a diagram showing a cross section taken along line AA of FIG. 4 (B).
FIG. 6 is a diagram showing another AA cross section of FIG. 4 (B).
FIG. 7 is a first diagram illustrating a method of dismantling a reinforced concrete structure using the structure crusher of FIG. 1;
FIG. 8 is a second diagram for explaining a method of dismantling a reinforced concrete structure using the structure crusher of FIG. 1;
FIG. 9 is a third diagram for explaining a method of dismantling a reinforced concrete structure using the structure crusher of FIG. 1;
FIG. 10 is a fourth diagram for explaining a method of dismantling a reinforced concrete structure using the structure crusher of FIG. 1;
FIG. 11 is a plan view of an arm of a building crusher according to another embodiment of the present invention.
FIG. 12 is a plan view of an arm of a building crusher according to still another embodiment of the present invention.
FIG. 13 is a plan view and a side view of another structure crusher to which the present invention can be applied.
FIG. 14 is a diagram showing an operation of dismantling a reinforced concrete structure using a conventional structure crusher.
FIG. 15 is a plan view showing the construct crusher of FIG. 14;
FIG. 16 is a plan view and a side view showing an arm of the building crusher of FIG. 14;
FIG. 17 is a view for explaining a problem caused by the construct crusher of FIG. 14;
FIG. 18 is a plan view showing another conventional structure crusher.
FIG. 19 is a view for explaining a problem caused by the construct crusher of FIG. 18;
[Explanation of symbols]
1 Structure crusher
2 arm
2a Crushing tip
2b shear blade
2c Intermediate crushing claw
2d crushing blade
3 Hydraulic cylinder
3a Piston rod
3b cylinder outer cylinder
4 Work equipment bracket
4a Stay member
4b annular flange
4c Mounting hole
5 Arm support
5a Side plate
5b annular flange
7 pin
8 pin
9 Swivel joint
20 Hydraulic excavator car
21 Reinforced concrete plate
22 Reinforcing bars
23 Reinforced concrete columns
32 arms
32a Crushing tip
32c Intermediate crushing claw
32d crushing blade
42 arm
42a Crushing tip
42c Intermediate crushing claw
42d crushing blade
51 Construction crusher
52a Crushing tip
52c Intermediate crushing claw

Claims (10)

It has a pair of arms pivotally supported on an arm support, and at least a tip crushing claw for crushing an object to be crushed is disposed at the foremost end of the arm so as to face the tip of the arm with a hydraulic cylinder. A building crusher that opens and closes to crush the crushing object,
The crushing blade for crushing the object to be crushed is disposed so that the cross section of the blade edge is triangular from the tip crushing claw to the rear end side of the arm. The building crusher according to claim 1, wherein the crushing blade has a ridge line of a cutting edge formed in a concavely curved shape from a front end side to a rear end side of the arm. An intermediate crushing claw for crushing the object to be crushed is disposed facing a substantially middle portion of the arm, and the crushing blade is disposed between the tip crushing claw and the intermediate crushing claw. The construct crusher according to claim 1 or 2, wherein: An intermediate crushing claw for crushing the object to be crushed is disposed at a substantially intermediate portion of the arm so as to face the crushing object, and the crushing blade is integrated with the intermediate crushing claw between the tip crushing claw and the intermediate crushing claw. The structure crushing machine according to claim 1 or 2, wherein the structure crushing machine is arranged in a simplified shape. A shearing blade for cutting the object to be cut is disposed in the vicinity of the pivotally supporting portion of the arm, and the crushing blade is integrated with the intermediate crushing claw between the tip crushing claw and the shearing blade. The structure crushing machine according to claim 1 or 2, wherein the structure crushing machine is arranged in a simplified shape. The building crusher according to any one of claims 1 to 5, wherein a cross section of the crushing blade has a trapezoidal shape. The building crusher according to any one of claims 1 to 6, wherein the crushing blade is formed integrally with the arm. The building crusher according to any one of claims 1 to 6, wherein the crushing blade is detachably formed on the arm. The structure crusher according to claim 1, wherein one of the arms is integrated with the arm support. The crushing blade according to claim 1, wherein the crushing blade is formed so as to be joined to the arm.

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