JPS5838564B2 - concrete crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to roadbeds such as concrete paved roads and asphalt paved roads, or floors and walls of concrete structures.
The present invention also relates to a concrete crusher for crushing similar materials.

Conventionally, the method of crushing the roadbed of concrete pavement or asphalt pavement has generally been adopted by applying an impact to the roadbed using a breaker or 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 the crushing method with low noise and vibration, for example, as seen in Japanese Utility Model Publication No. 51-9785, the end of the roadbed is held between a pair of clamping plates, and by tilting the clamping plates, the roadbed is A peeling tool has been developed that bends the pavement to lead to crushing. However, since this peeling tool crushes the pavement only by bending force, a hydraulic cylinder is used as the drive source to tilt the clamping plate. This method has the disadvantage that the bending point of action changes due to changes in the thickness of the roadbed, making the bending range irregular.

Based on 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 of them, for example, Japanese Patent Laid-Open No. 51-52635 discloses a There is a disclosed method, in which the arm member that clamps the roadbed rotates and presses the roadbed with its tip, so the clamping force decreases as the object to be crushed changes from thick to thin. However, in the case of reinforced concrete, there are problems such as the inability to crush and cut even thin materials, so it is necessary to install a large hydraulic cylinder with extra power.

In view of this, the present invention has been made for the purpose of providing a concrete crusher capable of crushing objects such as roadbeds without noise or impact using a relatively small driving force. The base of the lower jaw member is pivotally supported, a lower part of a support arm extending upwardly beyond the upper jaw member is pivotally supported on the lower jaw member, and a hydraulic cylinder is swingably supported on the upper part of the support arm. The piston rod is pivotally connected to the upper jaw member.

As a result, when the object to be crushed is gripped between the upper and lower jaw members and the upper jaw member is pressed down, the reaction force is received by the lower jaw member, and the object to be crushed is strongly clamped by the reaction force, and the chisel of the upper jaw member is The hydraulic cylinder follows the inclination of the upper jaw member, which rotates as it embeds the object to be crushed, and inclines, thereby minimizing the component of cylinder pressure and ensuring that the full force is applied to the clamping member. be.

Furthermore, the clamping width of the upper and lower jaw members can be increased to any desired width with a simple structure, thereby making it possible to crush even relatively thick objects.

Hereinafter, the present invention will be described with reference to specific embodiments shown in the drawings.

FIG. 1 shows a side view of a crushing head 1 of a concrete crusher according to the invention, and FIG. 2 shows the same front view.

In the figure, the upper jaw member 2 has a chisel 3 on the lower surface of the tip, and the base 4 is slightly bent downward.

The lower jaw member 5 has a clamping surface 6 that cooperates with the chisel 3 of the upper jaw member 2 on the top surface of the tip, and a fixed blade T that projects forward and enters the bottom surface of the end of the object to be crushed. It is bent upward, and its base end is pivotally supported by a shaft 9 at the base end of the upper jaw member 2 .

A bearing 10 is provided approximately in the middle of the lower jaw member 5 in the front-rear direction, and a support arm 11° 11 is attached to the shaft 12 on this bearing 10.
This support arm 11.11 extends upwardly so as to sandwich the upper jaw member 2, and is held between guide rollers 13, 14 provided on the sides of the upper jaw member 2.

The support arm 11.11 has a box-shaped guide pipe 19 pivoted to a bearing 10 of the lower jaw member 5 as shown in FIGS. 3 and 4, and an arm 20 is fitted onto this guide pipe 19 from the upper end. Insert this arm 20
A fixing pin 22 passing through the upper end of the guide pipe 19 may be removably engaged with pin holes 21, 21a drilled at appropriate locations to change the length of the arm 20.

A hydraulic cylinder 15 is swingably supported by a shaft 16 between the upper parts of the support arms 11 , 11 , and the lower end of a piston rod 17 that projects downward from the hydraulic cylinder 16 is connected to the upper surface of the upper jaw member 2 . There is.

These hydraulic cylinder 15 and support arm 11.degree. 11 are covered by a cover 18 which is fixed integrally with the lower jaw member 5.

Also, a bracket 23 protruding from the lower surface of the lower jaw member 5
A boom 24 and a link cylinder 25, which are either movable carts or fixedly installed, are connected to the crushing head 1, and are configured to allow the crushing head 1 to be moved up and down as well as tilted.

Next, the operation of the above embodiment will be explained.

The boom 24 is operated to thrust the fixed blade 7 of the lower jaw member 5 into the lower surface of the end of the object to be crushed, such as a roadbed, and then the hydraulic cylinder 15
When pressure oil is supplied to extend the piston rod 17,
The reaction force of the hydraulic cylinder 15 is received by the lower jaw member 5 through the support arm IL11, and the upper jaw member 2 rotates in the closing direction about the shaft 9, and the chisel 3 at the tip thereof sinks into the object to be crushed.

If the hydraulic cylinder 15 is further extended, this chisel blade 3
The object to be crushed is crushed under pressure.

In this case, as the upper jaw member 2 rotates, the support arm 11,
Since 11 is tilted forward as shown in Figure 1,
The hydraulic cylinder 15 also moves forward and tilts, and the upper jaw member 2
This hydraulic cylinder 15 is viewed from a direction substantially perpendicular to the inclination of
As a result, the pressing force of the hydraulic cylinder 15 acts as a biting force of the chisel blade 3 without producing a very large force component.

In addition, if the crushing force cannot be used alone to crush the crushing material, if the crushing head 1 is tilted forward by operating the link cylinder 25, a bending force will be applied to the crushed object using the pressure contact point of the chisel 3 as the point of action. A crushed object can be easily crushed.

Furthermore, if the object to be crushed is very thick, the width between the upper jaw member 2 and the lower jaw member 5 is widened as shown in the third figure, so that the opening width corresponds to the thick object to be crushed.

In this case, first, the upper jaw member 2 is prevented from rotating by any means, and then the hydraulic cylinder 15 is extended to prevent the arm 2 from rotating.
0 is extended along the guide pipe 19.

The pin 22 in any pin hole 21 of the arm 20 is inserted to fixedly connect the pipe 19 and the arm 20, and the piston rod of the hydraulic cylinder 15 is contracted to move the upper jaw member 2 in the opening direction (clockwise in FIG. 3). Rotate.

As a result, the opening width between the upper jaw member 2 and the lower jaw member 5 can be widened, and it is possible to accommodate relatively thick objects to be crushed.

Note that the chisel 3 is not fixed as shown in the figure, but can be replaced with another chisel depending on the properties of the object to be crushed or the purpose of crushing. By providing a crushing blade to the chisel 3, the object to be crushed can be vertically shredded after being crushed by the chisel 3.

Further, since the cover 18 covering the outer periphery of the crushing head 1 does not serve as a strength member, it may be provided as necessary, and may be formed of a thin sheet metal.

As described above, the present invention provides a structure in which the bases of an upper jaw member having a chisel at the tip and a lower jaw member having a fixed blade at the tip are supported, and the lower part of the support arm is attached to the lower jaw member and extends upward beyond the upper jaw member. A hydraulic cylinder is swingably supported on the upper part of this support arm, and the piston rod of this hydraulic cylinder is connected to the upper jaw member.
After the object to be crushed is held between the upper and lower jaw members, when the hydraulic cylinder is extended and the upper jaw member is pushed down, the reaction force is received by the lower jaw member through the support arm, so that the object to be crushed is strongly held. Since the hydraulic cylinder also rotates following the upper jaw member along with the pressing action of the hydraulic cylinder, it is possible to minimize the component force generated when the cylinder is depressed and apply a relatively large pressing force in the direction in which the chisel bites. It is possible to cut and crush crushed objects by effectively using the pressing force.

Furthermore, since the cover holding the lower jaw member does not hold the above-mentioned hydraulic cylinder but merely holds the lower jaw member, the cover itself does not need to be a strength member and can be made of a thin sheet metal or the like. Together, these make it possible to significantly reduce the weight of the crushing head.

Furthermore, by making the support arm extendable and retractable, the width of the opening between the upper jaw member and the lower jaw member can be widened, and it is possible to cope with relatively thick objects to be crushed.

[Brief explanation of the drawing]

FIG. 1 is a side view of the main parts of an embodiment of a concrete crusher according to the present invention, FIG. 2 is a front view of the same, FIG. 3 is a side view of an embodiment in which the clamping width is widened, and FIG. The figure is IV-
It is a sectional view of the TV. 1... Crushing head, 2... Upper jaw member,
3...Chisel, 5...Mandible member, 7.
...Fixed blade, 9...Axis, 11...
・Support arm, 13, 14... Guide roller,
15... Hydraulic cylinder, 17... Piston rod, 18... Cover 19...
・Guide pipe, 20...Arm.

Claims (1)

[Scope of Claims] 1. The bases of an upper jaw member having a chisel at the tip and a lower jaw member having a fixed blade at the tip are pivotally supported, and a pair of left and right support arms extending beyond the upper jaw member are attached to the lower jaw member in front and rear directions. A hydraulic cylinder is swingably supported on the upper part of the support arm, and a piston rod of this hydraulic cylinder is supported on the upper part of the support arm. A concrete crusher comprising: connected to the upper jaw member. 2 The support arm is composed of a guide pipe whose one end is pivotally supported on the lower jaw member, and an arm whose one end is pivotally supported on the hydraulic cylinder side and is inserted from the other end of the guide pipe, and the arm has a Several pin holes are bored at predetermined intervals perpendicular to the axis, a fixing pin is freely inserted into the guide pipe, and the fixing pin is selectively inserted into the pin hole of the arm. 2. The concrete crusher according to claim 1, wherein a support arm comprising a guide pipe and an arm is connected to each other so that the length thereof can be adjusted.