JPS5922004B2 - concrete crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concrete crusher for crushing roadbeds such as concrete paved roads and asphalt paved roads, floors and walls of concrete structures, and other similar objects to be crushed.

Conventionally, crushing machines for crushing the roadbed of concrete pavements and asphalt pavements have generally used a method in which the roadbed is crushed by applying an impact to the roadbed using braking force or a drop hammer, but this method does not cause large noise or noise during crushing. Since it is accompanied by vibration, its use in urban areas is severely restricted.

Therefore, in order to use a crushing method that produces less noise and less vibration, for example, as shown in Japanese Utility Model Publication No. 51-9785, the end of the roadbed is held between a pair of clamping plates, and this clamping plate is driven at an inclination to move the roadbed. A peeling tool that leads to crushing by bending has been developed, but in crushing with this peeling tool, the pavement road bed is crushed only by bending force, so hydraulic pressure is used as the drive source to tilt the clamping plate. There are disadvantages in that the cylinder must be large, and the point of bending action changes due to changes in the thickness of the roadbed, making the bending range irregular.

From the above, a crusher that crushes the roadbed by holding the roadbed between fixed claws and the tip of an arm rotated by a hydraulic cylinder and tilting the whole, for example, JP-A-51-5
There is a method disclosed in Japanese Patent No. 2635, in which the gripping arm members rotate and press the roadbed with their tips, so the contact point changes depending on the thickness of the object to be crushed, and therefore local There is a problem in that it is difficult to crush the sheet and create a crease, and it is difficult to crush it into a circular shape when folding it later.

Furthermore, in conventional crushers of this type, there is a member that presses the upper surface of the object to be crushed and guides it to crushing, for example,
In the case of what is shown in No. 52635, the member corresponding to the tip of the arm is predetermined, so it is used regardless of the object to be crushed, and therefore it has no effect on the properties of the object to be crushed. The drawback was that it could not be crushed manually.

In view of this, the present invention is capable of crushing objects to be crushed, such as roadbeds, without noise and without impact, using a relatively small driving force, and also enables localization of the part that serves as a fulcrum during crushing while clamping the object to be crushed. The purpose of this invention is to provide a concrete crusher that leads to crushing, requires less bending force, and allows the user to easily select and use the most suitable chisel blade according to the properties of the object to be crushed.

The present invention will be explained below with reference to embodiments shown in the drawings.

In FIGS. 1 and 2, the crushing head 1 has an elevating body 3 fitted onto a cylindrical head main body 2 made of a vertically elongated rigid body so as to be slidable in the vertical direction, and a chisel attached to one side of the elevating body 3. A blade holder 4 is attached.

A standard chisel blade 5 with a relatively sharp cutting edge is protruded from one side of the outer end of this chisel blade holder 4, and the other side on the opposite side is used to cut the reinforcing steel if there is one in the concrete. A rebar exposing chisel blade 6 with a flat cutting edge used for the purpose of exposing is attached, and crushing blades 7 and 8 are respectively provided on the backs of the standard chisel blade 5 and the rebar exposing chisel blade 6 in a direction orthogonal thereto. It is being Note that these crushing blades 7 and 8 are a standard chisel blade 5 and a chisel blade 6 for exposing reinforcing bars.
It is formed slightly lower and slopes downward toward the rear. Further, the crushing blades 7 and 8 may be formed integrally with the chisel blade holder 4, or separate crushing blades may be fixed by welding, bolts, etc., and the cutting edges of the crushing blades 7 and 8 are optional. If necessary, it can be given any shape, such as a wave shape or a sawtooth shape, instead of a straight shape, to enhance the vertical splitting effect during crushing. The chisel blade holder 4 configured as described above is fitted onto a horizontal shaft 9 provided on one side of the elevating body 3, and this shaft 9 and the chisel blade holder 4 are connected by a fastener such as a bolt. 10, it is designed to be firmly fixed.

According to the round shaft and round hole, the shaft 9 and the chisel blade holder 4 can be fitted together by rotating the chisel blade holder 4 without pulling out the chisel blade holder 4 each time, thereby exposing the standard chisel blade 5 or the reinforcing bar. The chisel blade 6 can be set in a predetermined position.

Furthermore, if the square shaft and the square hole are to fit together, it is necessary to pull out the chisel blade holder 4 each time, but the installation is stable. Further, the chisel blade holder 4 may be a member fixed to the elevating body 3, and a separate chisel blade may be attached thereto using bolts or the like. Further, a chisel blade having a cutting edge of an arbitrary shape can be provided on the side of the chisel blade holder 4 if necessary. A hydraulic cylinder 11 is installed inside the head body 2, and the base of the cylinder 11 is fixed to the beam member 12 of the elevating body 3, and the piston rod 13 is fixed to the mounting portion 14 of the head body 2 by pins 15 and 16, respectively. The elevating body 3 is moved up and down by expanding, contracting and driving the hydraulic cylinder 11.

Further, a fixed blade 17 is provided at the lower end of the head main body 2 at a position facing the chisel blade holder 4 and protrudes horizontally,
The cutting edge 17a is located at a position slightly retreated from the chisel blade 5. Furthermore, a reinforcing bar cutting clamping blade 18 is provided on the opposite side of the elevating body 3, and a reinforcing bar cutting clamping blade 19 that cooperates with the clamping blade 18 is protruded from the lower end of the same side of the head body 2. .

The upper clamping blade 18 has a knife-like blade shape as shown in FIGS. 2 and 3, and the lower clamping blade 19 has a groove 19a into which the upper clamping blade 18 is inserted. It is formed so that reinforcing bars and other similar strips can be cut by fitting.

The crushing head 1 configured as described above has a boom 23 connected to a main boom 22 mounted on a moving cart 21 on a bearing part 20 at the upper part of the head main body 2, and this boom 2.
The link cylinder 24 connected to the pins 25 and 26
By expanding and contracting the link cylinder 24, the crushing head 1 can be tilted upwardly.

In the figure, 27 indicates an object to be crushed, such as a roadbed. Next, the operation of the above embodiment will be explained. In order to crush the object 27 to be crushed, such as a roadbed, the standard chisel blade 5 or the chisel blade 6 for exposing reinforcing bars is first selected depending on the properties of the object 27 to be crushed.

In this selection, the stopper 10 is removed, the chisel blade head 4 is rotated, and the standard chisel blade 5 or the reinforcing bar exposing chisel blade 6 is placed on the lower side and fixed again with the stopper 10. Next, operate the booms 22 and 23 to remove the fixed blade 1 of the crushing head 1.
7 into the lower end of the object to be crushed 27 (if the object to be crushed 27 is a wall, hit it on the back side as shown in the fourth figure), and then extend the hydraulic cylinder 11. The elevating body 3 is slid down with respect to the head body 2, and the standard chisel blade 5 or the chisel blade 6 for exposing reinforcing bars of the chisel blade holder 4 of the elevating body 3 is pressed against the upper surface of the object 27 to be crushed, and the hydraulic cylinder 11 By extending the standard chisel blade 5 or the reinforcing bar exposing chisel blade 6, the material to be crushed 27 is embedded.

At this time, the chisel blade 5 or the reinforcing bar exposing chisel blade 6 is pressed down vertically without any rotational movement, so the pressing position is pressed down without fluctuation, and the object 27 to be crushed is subjected to a locally concentrated load. Eventually, cracks develop or the reinforcing steel is exposed. Then, by operating the link cylinder 24 and tilting the crushing head 1 counterclockwise about the pin 25 in FIG. Bending force acts as a point of action,
The synergistic effect of this bending force and the occurrence of cracks can easily lead to fracture.

In this case, if the hydraulic cylinder 11 is further extended, the crushed object 27 is strongly held between the fixed blade 17 and the crushing blade 7 and cut vertically into small pieces, facilitating removal work with a shovel. be able to. Furthermore, the fixed blade 17
However, if a blade that cooperates with the crushing blade 7 is provided on the top surface,
This allows for even better shredding. On the other hand, during the above operation, if there is a reinforcing bar in the object 27 to be crushed and it will hinder the crushing, the lower clamping blade 19 at the lower end of the head main body 2
is inserted under the reinforcing steel, and then the hydraulic cylinder 11 is activated to lower the elevating body 3, and the upper clamping blade 1 of the elevating body 3
If the steel bar 8 is applied to the reinforcing bar and then further rolled down, the reinforcing bar can be cut by the two clamping blades 18 and 19.

Even in this case, since the upper clamping blade 18 performs the cutting action without rotationally moving relative to the lower clamping blade 19, even better shearing is achieved. As explained above, in the present invention, an elevating body is attached to a head body made of a vertically elongated rigid body so as to be vertically slidable, and a fixed blade extending in the horizontal direction is attached to the lower end of the head body, and a fixed blade is attached to the side of the elevating body. The chisel blade is provided in a removable manner, and the fixed blade is embedded in the lower surface of the end of the roadbed, etc., and then the lifting body is vertically lowered by a hydraulic cylinder to cause the chisel blade to be embedded in the object to be crushed, and then the head body is tilted. Since the structure is such that the object to be crushed is crushed by moving the object to be crushed, the object to be crushed is crushed at the same point without displacement by the chisel blade, and therefore the point of destruction of the object supported by the fixed blade changes. Not only does this ensure that crushing is done quickly and accurately, but also that the chisel blade can be attached to and removed from the elevating body or rotated to select it.
It is possible to select and use a chisel blade with the shape and structure most suitable for crushing according to the properties of the object to be crushed, and it is possible to crush the object even more efficiently.Moreover, the elevating body is vertically aligned with respect to the head body. Since the head body only slides, a large supporting force can be obtained, and the reaction force generated when the head body is tilted or when the head body is tilted by the hydraulic cylinder can be sufficiently received.

Furthermore, if a clamping blade for cutting reinforcing steel is provided on the other side of the elevating body and the head main body as in the third invention, if there is reinforcing steel in the object to be crushed, it can be immediately cut into sections. Therefore, the crushing work can be carried out with higher efficiency without hindering the progress of the work.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing an embodiment of the concrete crusher of the present invention, Fig. 2 is an enlarged side view with a part of the crushing head in Fig. 1 in cross section, and Fig. 3 is a reinforcing bar cutting blade. The front view of FIG. 4 is an explanatory view showing the situation when a wall is crushed. 1... Crushing head, 2... Head body, 3... Lifting body, 4... Chisel blade holder, 5... Standard chisel blade, 6... Chisel blade for exposing reinforcing bars, T, 8 ... crushing blade,
10... Stopper, 11... Hydraulic cylinder, 17...
Fixed blade, 18, 19... Clipper blade for cutting reinforcing bars, 21...
- Mobile trolley, 22, 23...boom, 24...link cylinder, 2T...object to be crushed.

Claims (1)

[Scope of Claims] 1. An elevating body is fitted onto a head body made of a vertically elongated rigid body so as to be slidable up and down by a hydraulic cylinder built into the head body, and a fixing member extending in the horizontal direction is provided at the lower end of the head body. A concrete crusher comprising a protruding pawl, a downward chisel blade selectively attached to the elevating body, and the head body attached to a support such as a boom of a movable trolley so as to be movable up and down. 2. A vertically elongated rigid head body is fitted with an elevating body so as to be slidable up and down by a hydraulic cylinder built into the head body, and a fixing claw extending horizontally is provided protruding from the lower end of the head body; The elevating body has at least two radial directions.
A concrete crusher comprising a chisel blade holder equipped with two chisels rotatably mounted, a fixing means for fixing a selected chisel blade, and the head main body mounted on a support such as a boom of a mobile cart so as to be movable up and down. Machine. 3. A vertically elongated rigid head body is fitted with an elevating body so as to be slidable up and down by a hydraulic cylinder built into the head body, and a fixing claw extending horizontally is provided protruding from the lower end of the head body; A downward chisel blade is selectively attached to the elevating body, a lower clamping blade for cutting reinforcing bars is provided on the other side of the lower end of the head body, and a lower clamping blade for cutting reinforcing bars is provided on the other side of the elevating body. A concrete crushing machine comprising upper clamping blades each protruding from the blades and capable of cutting reinforcing bars in cooperation with the blades, and the head main body is mounted on a support such as a boom of a movable trolley so as to be movable up and down.