JP2945287B2 - Jaw crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jaw crusher for crushing stones (material to be crushed) such as stone and concrete generated when a building is demolished, and more particularly to an arm of a hydraulic excavator such as a power shovel. It is intended to improve the work efficiency and reduce the cost of the work of crushing the crushed material and the work of dispersing and spraying the crushed material as an embankment by being attachable to an attachment type.

[0002]

2. Description of the Related Art Conventionally, wastes (crushed materials) such as stones and concretes generated when a building is dismantled are finely crushed into earth and sand and reused as embankment. First, as shown in FIG. 11, a known concrete splitting machine 4 attached to the tip of an arm 2 of a power shovel 1 is used.
Crushed into small pieces. Next, the divided crushed material 5 is installed by a power shovel 2 having a bucket 6 attached to an arm 2 and a jaw crusher 7 of an installation type as shown in FIG. Are supplied to the jaw crushers 8, and these jaw crushers 7,
8 is finely crushed in the form of earth and sand.

As shown in FIGS. 12 and 14, the stationary jaw crusher 7 has a fixed plate 9 and a movable plate 1.
0, a pulley 11, a motor 12, a belt conveyor 13, a toggle plate 14, and a shaft 15. A shaft hole 10b is provided in a bearing portion 10a at one end of the movable plate 10, and a shaft 17 of the pulley 11 is rotatably inserted into the shaft hole 10b. The shaft hole 10b is provided eccentrically with respect to the center O of the bearing 10a, and the center P of the shaft 17 and the center O of the bearing 10a are eccentric as shown in FIG. When the pulley 11 is rotated by driving the motor 12,
The bearing 10 b of the movable plate 10 rotates around the center P of the shaft 17. Further, the movable plate 9 is elastically urged by the toggle plate 14.

When the motor 12 is driven, the bearing 10b of the movable plate 10 approaches and separates from the fixed plate 9 along an elliptical trajectory as shown by an arrow A in FIG. The other end of the plate 10 approaches and separates from the fixed plate 9 with a crescent-shaped trajectory as shown by an arrow B in FIG. Due to the movement of the movable plate 10, the crushed material 5 supplied between the fixed plate 9 and the movable plate 10 is finely crushed like earth and sand, and the crushed crushed material 5 ′ is discharged by the belt conveyor 18. .

On the other hand, the self-propelled jaw crusher 8 shown in FIG. 13 has a crushing mechanism including a fixed plate, a movable plate, a toggle plate, a pulley, a motor and the like, and a belt conveyor 18 similar to the above-mentioned installed type jaw crusher 7. Are mounted on an endless track type traveling device 19.

[0006]

When the installation type jaw crusher 7 shown in FIG. 12 is used, the crushed material crushed into small pieces by the concrete small crusher 4 is transported to the place where the jaw crusher 7 is installed. It is necessary to transport by such as. In addition, it is necessary to transport the crushed material crushed in the form of earth and sand by the jaw crusher 7 to a site where the crushed material is reused as embankment by a truck or the like. When the stationary jaw crusher 7 is used, it is difficult to efficiently perform the crushing operation, and the cost required for the operation is high.

On the other hand, since the self-propelled jaw crusher 8 shown in FIG. 13 has the traveling device 19, it can move freely within the site of dismantling work. However, since the traveling device 19 is of an endless track type, the jaw crusher 8 cannot travel on a general road, and must be transported to a work site for dismantling work by a large truck or the like.

[0008] In addition, when using the jaw crushers 7 and 8 of both the stationary type and the self-propelled type, in order to use the crushed material crushed in the form of earth and sand as an embankment, a power shovel or the like is used. It is necessary to disperse and disperse the crushed material, and it is difficult to work efficiently in this regard,
High cost of work.

In addition, both the stationary and self-propelled jaw crushers 7 and 8 are dedicated machines for crushing work, and are therefore large and expensive. In particular, since these jaw crushers 7 and 8 are provided with the belt conveyor 18 for discharging the crushed material to be crushed, they are large and expensive.

[0010] The present invention has been made in view of the above-mentioned problems, and a jaw crusher for crushing an object to be crushed can be attached to an arm of a hydraulic excavator such as a power shovel or the like in an attachment type, so that crushing work or the like can be performed. It is an object of the present invention to improve the work efficiency of the work of dispersing and spraying the crushed material as an embankment and to reduce the cost required for the work.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a fixed plate, a moving plate disposed opposite to the fixed plate, and a moving plate which is moved toward and away from the fixed plate. And a drive means for driving a hydraulic excavator having a traveling device, a frame provided with a bracket portion detachably attachable to an arm of the excavator, and a supply port for the crushed material provided at an upper portion in the frame. The fixed plate and the moving plate are disposed opposite to each other between the lower discharge port, and the fixed plate provided with reinforcing ribs at intervals on the back surface is fixed to a frame, while the moving plate driving means, A hydraulic cylinder supported by the frame is provided in a frame on the back side of the moving plate, and a rod end of the hydraulic cylinder is rotatably mounted on the back side of the moving plate, and is located away from the shaft mounting point. Rotate the moving plate to the above frame At the same time, the control unit of the hydraulic cylinder is installed in the frame, and the control unit is provided with an electromagnetic valve, and the electromagnetic valve is provided with a changeover switch that switches according to the position of the drive rod, A jaw crusher is provided in which a drive rod of a hydraulic cylinder is configured to automatically repeat a reciprocating operation between a retracted position and an extended position.

The hydraulic cylinder is driven by a hydraulic source of the hydraulic excavator. The number of the hydraulic cylinders may be one or two.

Further, a bucket for allowing the crushed material to flow into a supply port of the crushed material provided at the upper portion of the frame is detachably mounted on the upper surface of the frame. Further, it is preferable that the moving plate is rotatably mounted on a frame via a mounting member having an eccentric bearing.

[0014]

[0015]

In the jaw crusher of the present invention, the bracket is attached to the arm of the hydraulic excavator, and in this state, the hydraulic excavator is self-propelled to a required position on the demolition site of the building by driving the traveling device. . By operating the driving means, the movable plate is moved toward and away from the fixed plate to crush the object to be crushed into earth and sand.

In the jaw crusher, the hydraulic cylinder of the driving means is driven by the hydraulic source of the hydraulic excavator, and the drive rod of the hydraulic cylinder repeatedly extends and retracts, so that the movable plate approaches the fixed plate. Repeat withdrawal. In the jaw crusher, when the crushed object is scooped into the bucket by driving the arm of the hydraulic excavator, the crushed object is guided by the bucket and supplied between the fixed plate and the movable plate.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments shown in the drawings. As shown in FIG. 5, the jaw crusher 20 according to the first embodiment shown in FIGS. 1 to 4 has an arm 4 of a power shovel 41 having an endless track type traveling device 40.
Attachment 2 is detachably attached to an end of the attachment.

As shown in FIGS. 1 to 3, the jaw crusher 20 includes a fixed plate 22, a movable plate 23, and a driving means 24 in a frame 21. The jaw crusher 20 includes a bracket 25 and a bucket 26 at required positions of the frame 21.

The frame 21 has a pair of substantially rectangular side plates 21a, 21a. These side plates 21a,
The rear side of 21a is connected by a connecting plate 21b at a required interval, and the upper side is connected by a connecting plate 21c. The side plates 21a, 21a are connected by a first base 30 and a second base 31 arranged on the rear side.

The connecting plate 21b is provided with an insertion hole 21e, and connection pipes 39A, 39B for connecting the hydraulic pump 51 of the power shovel 41 and the hydraulic cylinder 32 of the driving means 24 described later to the insertion hole 21e. Is inserted. On the other hand, the connecting plate 21c between the side plates 21a has a supply port 21f through which the crushed material flows from the bucket 26.
Is provided. The lower opening between the side plates 21a, 21a constitutes a discharge port 21h for discharging the crushed material. Further, a mounting member 29 for pivotally mounting the movable plate 23 is bolted to the rear side of the side plates 21a, 21a.

The fixing plate 22 extends between the supply port 21f and the discharge port 21h, and has both sides fixed to the side plates 21a, 21a of the frame 21. A crushing plate 35 is attached to a surface (a rear surface) of the fixed plate 22 facing the movable plate 23. The crush plate 35 is provided with a ridge 35a having a triangular cross section extending in the longitudinal direction and continuous in the width direction. The fixing plate 22 is provided with reinforcing ribs 22a at intervals.

The movable plate 23 is disposed so as to face the fixed plate 22, and a space surrounded by the side plates 21a, 21a, the fixed plate 22 and the movable plate 23 forms a crushing chamber C. The upper end of the movable plate 23 has a cylindrical bearing portion 23.
a is provided. The bearing portion 23a is provided with a shaft hole 23b having a circular cross section centered on a position P eccentric downward from the center O in the radial direction. The first shaft portion 27b of the shaft member 27 is fitted into the shaft hole 23b via a bearing 28B. On the other hand, the second shaft portion 27a of the shaft member 27 is eccentric with respect to the first shaft portion 27b, and
It is coaxial with the center O of 3a. The second shaft 27a is fitted into the mounting member 29 via a bearing 28A. Surface of the movable plate 23 on the side facing the fixed plate 22
The crush plate 36 is attached to the (front surface).
The crushing plate 36 has the same shape as the crushing plate 35 of the fixed plate 22 so that the ridges 35a and 36a of the crushing plates 35 and 36 are alternately positioned.

In this embodiment, the movable plate 23 is fixed
2 fixed plate 22 on the outlet 21h side in the state closest to
The distance between the movable plate 23 and the movable plate 23 is set to about 40 to 100 mm. The distance between the fixed plate 22 and the movable plate 23 on the supply port 21f side is set to about 400 mm. further,
The length of the crush plate 36 of the movable plate 23 is about 800 to
It is about 1000 mm.

The driving means 24 includes a hydraulic cylinder 32,
A toggle plate 33 and a shaft 34 are provided.

The hydraulic cylinder 32 includes a cylinder section 32
a and a drive rod 32b, and are disposed in the frame 20 with the tip of the cylinder portion 32a facing downward. The cylinder portion 32a is pivotally connected to the second base portion 31, while the distal end of the drive rod 32b is
It is pivotally attached to the back side of. The hydraulic cylinder 32
Includes a control unit 32c. As shown in FIG. 4, a four-port three-position valve 60 is provided in the control unit 32c.
And a four-port two-position valve 61. The valve 61 is provided with a changeover switch 62 that switches according to the position of the drive rod 32b. The pipes 39A and 39B of the control unit 32c are connected via a joint 58 to the pipes 57A and 57A of the hydraulic mechanism 19 provided in the power shovel 41.
57B is detachably connected. This hydraulic mechanism 19
Are a reservoir 50, a hydraulic pump 51 constituting a hydraulic source driven by a motor, a four-port three-position valve 52,
And a relief valve 53. The valve 52 is provided with an operation pedal 54 for controlling the operation and stop of the hydraulic cylinder 32. Note that, instead of the operation pedal 54, an operation lever that can be manually operated by an operator may be provided.

When the operation pedal 54 is turned on,
The valve 52 switches from the D position to the E position, and the pump 5
1 to pipe P2, valve 52, pipe P4, pipe 5
Hydraulic fluid is supplied to the valve 61 via 7A, 39A and pipes P5, P6. At this time, since the drive rod 32b is at the retracted position side (top dead center side) and the valve 61 is at the J position, hydraulic oil is supplied to the operating portion 60a of the valve 60 through the pipe P7.

When hydraulic oil is supplied to the operating portion 60a, the valve 60 switches from the G position to the H position, and the pipe P
The hydraulic fluid is supplied to the cylinder part 32a via P5 and P8. Therefore, the drive rod 32b is located on the left extension position side in the drawing.
(Bottom dead center side), the changeover switch 62 is operated, and the valve 61 is switched to the K position.

When the valve 61 reaches the K position, the valve 60
The supply of hydraulic oil to the operating part 60a is shut off, while the valve 60 is connected via the pipe P6, the valve 61, and the pipe P9.
The hydraulic oil is supplied to the operating part 60b, and the valve 60 moves to the position I. Thereby, the pipe P5, the valve 60,
Hydraulic oil is supplied to the cylinder portion 32a via the pipe P10, and the drive rod 32b moves to the retracted position.
By the movement of the drive rod 32b, the switch 62 is operated to switch the valve 61 to the J position, the supply of the hydraulic oil to the operating portion 60b of the valve 60 is cut off, and the valve 60 is switched to the G position by a spring.

By repeating the above operation, the hydraulic cylinder 32
Drive rod 32d repeats reciprocating movement between the retracted position and the extended position. When the control section 32c has the above configuration, the drive rod 32b can be driven at a speed of about 100 (times / minute).

When stopping the drive rod 32b,
The operation pedal 54 is turned off, the valve 52 is switched to the F position, and the hydraulic oil is returned to the reservoir 50 through the pipes P3 and P11.

The toggle plate 33 has a plate-like portion 33.
At both ends of a, spherical portions 33b and 33c for mounting are provided, and are disposed in the frame 21 in a posture inclined downward at a required angle from the second base portion 31 toward the movable plate 23 side. One spherical portion 33 b of the toggle plate 33 is connected to a ball bearing portion 31 c of the second base 31. The other spherical portion 33c of the toggle plate 33 is connected to a ball bearing portion 23c formed on the movable plate 23 facing the same.

The shaft 34 has a mounting portion 34a at one end.
The mounting portion 34a is provided with the toggle plate 3
The third spherical portion 33c is pivotally attached to the movable plate 23 at a position lower than the ball bearing portion 23c to which the third spherical portion 33c is connected. Also, the shaft 34
The other end of the insertion portion 3 projects from below the second base portion 31.
1a is inserted in the insertion hole 31b in a loosely inserted state. In the portion protruding rearward from the insertion hole 31b of the shaft 34,
The bolt 101 is attached with the washer 100 interposed.
Further, the insertion portion 31b of the shaft 34 and the washer 100
A compression spring 38 is compressed in a portion between the two, and the compression spring 38 urges the shaft 34 rearward (to the right in FIGS. 1 and 3A).

The bracket 25 includes a rectangular substrate 25a and a pair of mounting plates 25b, 25b protruding from both sides of the substrate 25a. The board part 25a
Is attached to the connection plate 21b by bolting.
An insertion hole 25e communicating with the insertion hole 21e of the connecting plate 21b is provided in a portion of the board portion 25a sandwiched between the mounting plates 25b, 25b. On the other hand, the mounting plate 25b,
At the end of 25b, mounting holes 25c and 25d for connecting to the arm 42 of the power shovel 41 are provided. The arm 42 of the power shovel 41 is connected to a boom 43, and includes a drive arm 42A connected to a drive rod 44a of a hydraulic cylinder 44, and a movable arm 42B. The connecting pin is inserted into the mounting hole 25c of the mounting plate 25b, 25c and the mounting hole 42A-1 provided at the distal end of the drive arm 42A, and the distal end of the drive arm 42A is fixed to the mounting plate 25b, 25c. The other mounting hole 25d,
The connecting pin is inserted into a mounting hole 42B-1 provided at the tip of the fixed arm 42B, and the tip of the fixed arm 42B is attached to the mounting plate 2.
5b, 25b. As described above, the jaw crusher 20 according to the present embodiment includes the arm 4 of the power shovel 41.
2 can be detachably attached to an attachment type.

The above-mentioned bucket 26 has an opening 2 on the upper side in the figure.
It has a quadrangular pyramid shape that is gradually reduced toward the opening 26b below 6a. The lower opening 26b
Is provided with a flange portion 26c, and the periphery of the flange portion 26c is fixed to the connecting plate 21c by bolting. The bucket 26 has a front wall surface 26d.
Is an arc-shaped curved surface, and a plurality of claw-shaped projections 26e are provided at a required interval on an upper edge thereof.

Next, the crushing operation of the crushed object by the jaw crusher 20 will be described. First, as shown in FIG. 5A, the hydraulic cylinder 44 of the power shovel 41 is driven to extend the drive arm 42A, and as shown by the arrow L in the figure, the opening 26a of the bucket 26 faces the front side. The jaw crusher 20 is rotated so as to face. With the jaw crusher 20 in this position, the excavator 45
By operating the boom 43, the crushed material 5 that has already been divided is scooped into the bucket 26.

Subsequently, the hydraulic cylinder 44 is driven to retract the drive rod 44a, and the jaw crusher 20 is rotated so that the opening 26a of the bucket 26 faces upward as shown by the arrow M in the drawing. Thereby, the bucket 26
The object to be crushed is supplied into the crushing chamber C through the opening 26b and the supply port 21f.

As described above, the jaw crusher 2 of this embodiment is
0 has the bucket 26, so that the crushed object 1 can be reliably scooped, and the scooped crushed object 1 can be reliably guided into the crushing chamber C.

Next, with the object 1 to be crushed in the crushing chamber C as described above, the traveling device 40 is driven to move the power shovel 41 to a place where embankment is performed, and then the operation switch 54 is turned on. In this state, the drive rod 32b of the hydraulic cylinder 32 is reciprocated between the extended position and the retracted position to crush the object 1 in the crushing chamber C.

At this time, the jaw crusher 20 operates as follows. FIG. 3A shows the hydraulic cylinder 3
2 shows a state where the second drive rod 32b is extended most. The spherical portion 33c of the toggle plate 33 attached to the movable plate 23 is located at the lowermost side. Further, the shaft 34 is located at a position closest to the movable plate 23 side from the insertion portion 31b, and the compression spring 38 is extended, so that the movable plate 23 is urged rearward by the shaft 34.

From the state shown in FIG.
When the drive rod 32b is moved to the position where it is most retracted, the movable plate 23 moves about the center point P as a fulcrum in the arrow direction X in the figure.
As shown by, it rotates in the direction approaching the fixed plate 22. By the movement of the movable plate 23, the toggle plate 33 becomes
As shown by the arrow Y, the spherical portion 3 attached to the second base portion 31
The spherical portion 33c rises with 3b as a fulcrum. Also,
The shaft 34 moves in the arrow direction Z with the mounting portion 34a as a fulcrum, and the compression spring 38 is compressed.

As described above, the movable plate 23 repeatedly approaches and separates from the fixed plate 22 in accordance with the position of the drive rod 32b of the hydraulic cylinder 32.
, The objects to be crushed in the crushing chamber C are crushed by the crushing plate 35 of the fixed plate 22 and the crushing plate 3 of the movable plate 23.
6 and crushed. When the movable plate 23 moves away from the fixed plate 22, the gap between the crushing plates 35 and 36 on the discharge port 21h side widens, and the crushed material in the crushing chamber C descends from the discharge port 21. . At this time, the material to be crushed having a size larger than the gap cannot pass through the gap and does not fall from the discharge port 21h, so that the material to be crushed can be reliably crushed into earth and sand.

At this time, by operating the boom 43 or driving the traveling device 40, the crushed material is discharged from the discharge port 21h while the position of the jaw crusher 20 is moved.
Can be dispersed and sprayed. After crushing all the crushed materials 1 in the crushing chamber C,
As shown in FIG. 4A, the crushed object 1 is scooped again, and the crushed object is crushed in the same manner.

As described above, since the jaw crusher 20 of the present embodiment is used by being detachably attached to the arm 42 of the power shovel 41, the jaw crusher 20 can be moved to a required position by the traveling device 40 of the power shovel 41. That is, in the jaw crusher 20 of the present embodiment, the power shovel 41 is moved to a position where the crushed object is crushed into small pieces, the crushed object is scooped, and the power shovel 41 is further moved to the point where embankment is performed. Because it can be moved, the work to transport the crushed material by truck etc.,
There is no need to perform the work of supplying the crushed material to the jaw crusher with the power shovel with the bucket attached. Further, by driving the boom 43 of the power shovel 41 and crushing the object to be crushed while moving the position of the jaw crusher 20, the object to be crushed can be dispersed and sprayed at the place where the embankment is performed. Therefore, there is no need to perform the work of dispersing and spraying the crushed material. As described above, by using the jaw crusher 20 of the present embodiment, the crushing operation and the operation of dispersing and dispersing the crushed object can be efficiently performed, and the cost required for the operation can be reduced.

Further, the jaw crusher 2 according to this embodiment
The excavator 41 for attaching the zero excavator is usually always used at the demolition site. However, when the conventional self-propelled jaw crusher described above is used, the power shovel and the self-propelled jaw crusher are each large. While it is necessary to transport the excavator to a demolition site by truck or the like, if the jaw crusher 20 of this embodiment is used, the power shovel is transported by a large truck or the like,
Can be transported by a smaller truck or the like, so that the cost required for transportation can be reduced.

Further, in the jaw crusher 20 of the present embodiment having the above structure, the movable plate 23 is
2, and is smaller and lighter than a conventional stationary or self-propelled jaw crusher configured to drive the movable plate 10 by a mechanism including a motor 12, a pulley 11, and a belt 13. is there.

Further, in this embodiment, since the object to be crushed is dropped from the jaw crusher 20 attached to the arm 42 of the power shovel 41, a belt such as a conventional stationary or self-propelled jaw crusher is used. The device is also small and lightweight in this regard, since no conveyor is required.

Next, a second embodiment of the present invention shown in FIG. 6 will be described. 7A and 7B, the jaw crusher 20 'according to the second embodiment is attached to the arm 42 such that the opening 26a of the bucket 26 faces the power shovel 41 side. Further, in the jaw crusher 20 ', the movable plate 23 is attached to the attachment member 29' via the bearing 23, and the movable plate 23 is rotatable around the center O of the bearing portion 23a. Further, in the second embodiment, the driving means 24 comprises only the hydraulic cylinder 32 in which the driving rod 32b is pivotally connected to the movable plate 23, and does not include a toggle plate, a shaft, a compression spring and the like as in the first embodiment. . Since the other structure of the second embodiment is the same as that of the first embodiment, the same members are denoted by the same reference numerals and description thereof will be omitted.

Jaw crusher 2 according to the second embodiment
When the crushing operation is performed by using 0 ′, first, FIG.
As shown by the middle arrow R, the drive arm 42 is set to the retracted position, and the opening 26a of the bucket 26 is directed downward,
In this state, the boom 43 is operated to scoop the crushed object 5 into the bucket 26.

Next, as shown by an arrow Q in FIG.
With the drive arm 42A in the extended position, the crushed object 5 in the bucket 26 is supplied into the crushing chamber C, and the traveling device 4
After driving the excavator 41 to the place where embankment is to be performed by driving the hydraulic cylinder 32, the hydraulic cylinder 32 is driven. When the drive rod 32b of the hydraulic cylinder 32 extends, the movable plate 23 rotates around the center O so as to approach the fixed plate 22, as indicated by an arrow T in FIG. On the other hand, when the drive rod 32 moves to the retracted position, the movable plate 23 rotates around the center O so as to separate from the fixed plate 22. As the movable plate 23 repeatedly approaches and separates from the fixed plate 22 in this manner, the object to be crushed in the crushing chamber C is pressed and crushed between the crushing plates 35 and 36.

The jaw crusher 20 'of the second embodiment
Similarly to the first embodiment, since the power shovel 41 is detachably attached to the arm 42 of the power shovel 41 and used, the power shovel 41 is moved to a place where there is a crushed material in a small split state or to a place where embankment is performed. The crushing work and the work of dispersing and spraying the crushed material to be crushed can be efficiently performed, and the cost required for the work can be reduced. Further, with the jaw crusher 20 ', the cost required for transportation can be reduced.

Also, the jaw crusher 2 of the second embodiment
In the case of 0 ', in particular, since the driving means 24 has a simple structure consisting only of the hydraulic cylinder 32, the structure is simple, small and lightweight, and the manufacturing cost is low as compared with the conventional jaw crusher.

The jaw crusher 20 '' of the third embodiment of the present invention shown in FIG. 8 is attached to the arm 42 so that the opening 26a of the bucket 26 faces the power shovel 41, similarly to the second embodiment. .

In the jaw crusher 20 ″, the central portion of the movable plate 23 in the longitudinal direction is provided with a bearing 71.
It is rotatably mounted on the mounting member 29 '' via
The drive rod 32b of the hydraulic cylinder 32 is pivotally connected to one end of the movable plate 23. In the third embodiment as well, the driving means 24 comprises only the hydraulic cylinder 32, and does not include a toggle plate, a shaft, a compression spring and the like.

When the hydraulic cylinder 32 is actuated, the movable plate 32 repeatedly approaches and separates from the center plate O at both ends with respect to the fixed plate 22, as shown by arrows U and V in FIG. The object to be crushed in the crushing chamber C is pressed and crushed by the crushing plates 35 and 36.
Other structures and operations of the third embodiment are the same as those of the second embodiment.

The present invention is not limited to the above embodiment, but can be variously modified. First, the configuration of the control unit 32 of the hydraulic cylinder 32 is not limited to the configuration shown in FIG. For example, the control unit 32 may have a structure shown in FIG. In FIG. 9, pipes 39A,
39B includes a four-port three-position valve 81 and a changeover switch 82. When the drive rod 32b is in the retracted position, the changeover switch 82 is switched to the A side, power is supplied to the solenoid on the A side of the valve 81, and the valve 81 is switched from the X1 position to the X2 position. At the position X2, hydraulic oil is supplied to the top dead center side of the cylinder 32a, and the drive rod 32b advances. When the drive rod is at the most extended position, the changeover switch 81 switches to the B side, and the valve 8
1, the solenoid is supplied to the B side, the valve 81 switches from the X2 position to the X3 position, hydraulic oil is supplied to the bottom dead center side of the cylinder 32a, and the drive rod 32b moves to the retracted position. By repeating the above operation, the drive rod 32b repeats reciprocating movement.

FIG. 10 shows a configuration in which limit switches 83A and 83B are provided instead of the changeover switch 82 in FIG. 9, and the switch 83A is turned on at the top dead center, and the switch 83B is turned on at the bottom dead center. Become.

Further, in the above embodiment, the driving means 24
Has one hydraulic cylinder 32,
A plurality of hydraulic cylinders may be provided in the frame 21 in parallel. In this case, the force for pressing and crushing the object to be crushed increases.

Further, in the above embodiment, the jaw crusher 20 is attached to the arm of the power shovel 41. However, the jaw crusher of the present invention is not limited to the power shovel, and various other generally known self-propelled vehicles can be used. It can be used by attaching it to a hydraulic excavator of the type.

[0059]

As is clear from the above description, since the jaw crusher according to the present invention is mounted on the arm of the hydraulic excavator by the bracket, it is moved to a required position by the traveling device of the hydraulic excavator. The crushed object can be scooped by operating the arm. Therefore, in the jaw crusher according to the first aspect, the work to transport the material to be crushed by a truck or the like, the work to supply the material to be crushed by a power shovel having a bucket attached thereto, and the work to crush the material to be crushed in the earth and sand by a power shovel or the like. There is no need to perform the work of dispersing and spraying the crushed material, so that the work can be performed efficiently and the cost required for the work can be reduced.

Further, since the hydraulic excavator is always used at the demolition site, a jaw crusher attached to the arm of the hydraulic excavator can reduce the transportation cost.

Further, since the object to be crushed can be dropped from the jaw crusher attached to the arm of the hydraulic excavator, it is necessary to use a belt conveyor such as a conventional stationary or self-propelled jaw crusher. Compact and lightweight.

Further, the jaw crusher of the present invention uses a hydraulic cylinder driven by a hydraulic source of a hydraulic excavator as driving means for driving the movable plate, so that the movable plate is driven by a mechanism including a motor, a pulley, and a belt. It is smaller and lighter than a conventional stationary or self-propelled jaw crusher having such a configuration.

Further, since the jaw crusher of the present invention is provided with a bucket for guiding the object to be crushed between the fixed plate and the moving plate, the object to be crushed can be reliably scooped and supplied between the fixed plate and the moving plate. it can.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a jaw crusher according to a first embodiment of the present invention is mounted on an arm of a hydraulic excavator.

FIG. 2A is a plan view of a jaw crusher, and FIG.
It is a rear view of a jaw crusher.

3A is a cross-sectional view of a jaw crusher, and FIG.
FIG. 3A is a cross-sectional view taken along line III-III of FIG.

FIG. 4 is a hydraulic circuit diagram showing a hydraulic cylinder and a hydraulic mechanism.

FIGS. 5A and 5B are schematic views for explaining a crushing operation by the jaw crusher according to the first embodiment.

FIG. 6 is a side view showing a state in which a jaw crusher according to a second embodiment of the present invention is attached to an arm of a hydraulic excavator.

FIGS. 7A and 7B are schematic diagrams illustrating a crushing operation by a jaw crusher according to a second embodiment.

FIG. 8 is a side view showing a state in which a jaw crusher according to a third embodiment of the present invention is attached to an arm of a hydraulic excavator.

FIG. 9 is a hydraulic circuit diagram showing another example of a hydraulic mechanism.

FIG. 10 is a hydraulic circuit diagram showing another example of a hydraulic mechanism.

FIG. 11 is a schematic view showing a crushing operation by the small splitter.

FIG. 12 is a schematic view showing a crushing operation by a conventional stationary jaw crusher.

FIG. 13 is a schematic view showing a crushing operation by a conventional self-propelled jaw crusher.

FIG. 14 is a cross-sectional view showing the structure of a conventional jaw crusher.

[Explanation of symbols]

 20, 20 ', 20 "Jaw crusher 21 Frame 21a Side plate 22 Fixed plate 23 Movable plate 24 Driving means 25 Bracket portion 26 Bucket 32, 32' Hydraulic cylinder 32b, 32b 'Drive rod 40 Traveling device 41 Power shovel 42 Arm

Claims (4)

(57) [Claims] 1. A hydraulic excavator having a fixed plate, a moving plate disposed opposite to the fixed plate, driving means for driving the moving plate toward and away from the fixed plate, and a traveling device. A frame provided with a bracket portion which can be detachably attached to the arm of the arm, in the frame, the fixed plate and the movable plate are provided between a supply port of the crushed material provided at an upper portion and a lower discharge port. The fixing plate provided with reinforcing ribs at intervals on the back side is fixed to the frame, while the driving means for the moving plate is supported by the frame in the frame on the back side of the moving plate. A hydraulic cylinder is provided, and the rod end of the hydraulic cylinder is rotatably mounted on the rear side of the movable plate, and the movable plate located away from the shaft mounting point is rotatably mounted on the frame, and The control unit of the hydraulic cylinder is Installed in serial within the frame,
The control unit is provided with an electromagnetic valve, and the electromagnetic valve is provided with a changeover switch that switches according to the position of the drive rod, and the drive rod of the hydraulic cylinder automatically repeats reciprocating operation between the retracted position and the extended position. A jaw crusher having a configuration. 2. The jaw crusher according to claim 1, wherein a bucket for allowing the crushed object to flow into a supply port of the crushed object provided at an upper portion of the frame is detachably attached to an upper surface of the frame. 3. The jaw crusher according to claim 1, wherein the movable plate is rotatably mounted on a frame via a mounting member provided with an eccentric bearing. 4. The jaw crusher according to claim 1, wherein one or more hydraulic cylinders are provided.