JP2001300330A - Crushing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crushing device by which a large quantity of materials to be crushed is taken in a bucket and efficiently crushed uniformly, the particle size of the crushed materials can be adjusted and the foreign materials such as a reinforcing bar can be easily removed. SOLUTION: This crushing device is provided with the bucket in which the subject such as building waste materials to be crushed is taken through a bucket opening 9 and housed and from the bottom part of which the crushed material is discharged, a jaw crusher 13 which is installed near the opening 9 and primarily crushes the subject taken in the bucket 8 into the crushed one having the prescribed particle size and a rotary crusher 14 where the crushed one obtained by primarily crushing by the crusher 13 is secondarily crushed into the crushed material having smaller particle size by cooperation of a rotary edge 31 and a crushing plate 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing apparatus for storing crushed materials, such as building waste, through an opening of a bucket.
The present invention relates to a crushing device for primary crushing to a predetermined size by a jaw crusher, then secondary crushing to a smaller diameter by a rotary crusher, and discharging the crushed material from the bottom.

[0002]

2. Description of the Related Art Waste materials such as stone, concrete, and asphalt generated during the demolition of buildings are finely crushed into earth and sand, crushed in order to be reclaimed in a site or reused as covering soil. The device has been proposed and put into practical use. For example, a jaw crusher disclosed in Utility Model Registration No. 3032387 has been proposed. In this jaw crusher, a fixed plate and a movable plate are arranged opposite to each other in a frame, and the movable plate is moved toward and away from the fixed plate by a hydraulic cylinder to crush the object to be crushed and discharged from a lower end opening of the frame. Is what you do.

[0003] For example, a bucket with a crushing device disclosed in Japanese Patent Application Laid-Open No. 9-53252 has been proposed. In this bucket with a crushing device, a pair of crushing teeth cylinders are rotatably provided in the bucket, and these are forcedly rotated by a hydraulic motor to crush concrete lumps, asphalt lumps, and the like.

[0004]

[Problems to be Solved by the Invention] Utility model registration No. 303
The jaw crusher disclosed in No. 2387 has a low crushing capacity because the moving plate is repeatedly brought into and out of contact with the fixed plate to strike and crush the object to be crushed between the plates. In addition, it is difficult for the crushed material to be reused to have a uniform particle size, and crushed materials such as reinforcing steel and asphalt are easily clogged in the frame openings. In addition, since there is always a gap between the moving plate and the fixed plate, there is also a problem that the elongated columnar crushed object cannot pass through the gap and cannot be crushed.

In a bucket with a crushing device disclosed in Japanese Patent Application Laid-Open No. 9-53252, the size of a crushable object that can be crushed by being wound between crushing teeth cylinders is limited, and a relatively large particle size is required. Remains in the bucket without being scraped between the crushing teeth. In addition, since the pair of crushing cylinders are driven by the hydraulic motors provided on the respective rotating shafts, the weight of the device increases, and the fuel efficiency, operability, and stability of the device decrease.
In addition, since the distance between the crushing teeth is constant, it is not possible to adjust the particle size of the crushed material.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and to efficiently and uniformly crush the material to be crushed by taking a large amount of the material to be crushed into a bucket, and to control the particle size of the crushed material. It is an object of the present invention to provide a crushing device capable of easily removing foreign matter.

[0007]

To solve the above-mentioned problems, the present invention has the following arrangement. That is, a crushable material such as building waste is taken in from the opening and accommodated therein, and a bucket capable of discharging the crushed material from the bottom and a crushable material provided in the vicinity of the bucket opening and taken into the bucket are primarily crushed to a predetermined size. And a rotary crusher for secondary crushing of the crushed material primary crushed by the jaw crusher to a smaller diameter by cooperation of the rotary blade and the crushing plate.

Further, the jaw crusher is provided with a fixed portion having fixed-side crushed teeth and fixed to the inner wall of the bucket, and is rotatably provided around a spindle provided with movable-side crushed teeth and provided on the bucket. A movable part supported by a rotating arm,
The movable portion is connected to a cylinder rod of a hydraulic cylinder connected to a hydraulic circuit, and the movable portion is moved toward and away from the fixed portion by operating the hydraulic cylinder.
In this case, the movable portion is formed with movable side crushing teeth such that the amount of protrusion decreases toward the depth side from the opening side, and the fixed portion increases in height from the opening side toward the depth side. Preferably, the fixed side crushing teeth are formed. Also,
The rotary crusher is provided with a plurality of rotary blades in the axial direction on a peripheral surface of a rotary shaft, and is capable of being driven forward and reverse by a hydraulic motor connected to a hydraulic circuit. In this case, the first and second crushing plates are provided around the rotary blade at positions substantially opposed to each other, and the first crushing plate faces in the rotation direction of the rotary blade between partition plates that partition the rotary blade into a comb-like shape. And a protruding crushing rib close to the cutting edge is provided,
It is preferable that the second crushing plate is provided with an inclined portion close to the cutting edge in the rotation direction of the rotary blade between partition plates that partition the rotary blade into a comb-like shape. Alternatively, the first crushing plate is provided with a crushing surface that is continuous in the rotation direction of the rotary blade and is close to the cutting edge in the rotation direction of the rotary blade, between the partition plates that partition the rotary blade in a comb-tooth shape. You may do it.
The bucket may be exchangeably provided at the extremity of the excavator arm and link, and the jaw crusher and the rotary crusher may be operated using the hydraulic circuit of the excavator. The jaw crusher and the rotary crusher may be operated using a dedicated hydraulic circuit for the bucket.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the present embodiment, a description will be given of an apparatus configuration in which a crushing device is exchangeably provided at an arm and a link tip of an excavator. FIG. 1 is an explanatory view of a hydraulic shovel equipped with a crusher, FIG. 2 is an explanatory view of a crusher,
3 is a cross-sectional view in the direction of arrows ABCD in FIG. 2, FIG. 4 is a partial explanatory view as viewed in the direction of arrow E in FIG. 2, and FIGS. 5 (a) and 5 (b).
FIG. 6C is a front view, a top view, and a bottom view of the movable portion of the jaw crusher, and FIGS. 6A and 6B are a front view and a right side view of a first crushing plate of the rotary crusher, and FIG. )
(B) is a front view and a right side view of a second crushing plate of the rotary crusher, FIG. 8 is an explanatory diagram of a hydraulic circuit of the rotary crusher, FIG. 9 is an explanatory diagram of a hydraulic circuit of the jaw crusher, and FIG. Operation explanation diagram, FIG.
11A and 11B are explanatory diagrams of a secondary crushing operation by a rotary blade and a first crushing plate, and FIGS. 11B to 11D are explanatory diagrams of a secondary crushing operation by a rotary blade and a first crushing plate according to another example. It is.

First, a schematic configuration of a crusher provided in a hydraulic excavator will be described with reference to FIGS. Reference numeral 1 denotes a hydraulic excavator, and an excavator 3 is mounted on an endless track type traveling device 2 so as to be able to turn 360 degrees. This excavator 3
Includes a drive unit 4 having a built-in hydraulic drive mechanism such as an engine and a hydraulic pump, and a cab 5 for housing and operating a worker.
And an arm 6 for working and a link 7 for operating the arm
Is provided.

Reference numeral 8 denotes a bucket, which takes in and stores crushed materials such as construction waste materials through the opening 9 and discharges the crushed materials from the bottom. The bucket 8 is exchangeably connected to the arm 6 and the link 10 by a pin 11. Excavation teeth are formed at the opening edge of the bucket 8 so that earth and sand can be excavated. Side cutters 12 may be provided on both sides near the bucket opening 9. The side cutter 12 is inserted into an excavation surface to guide the entry of excavated teeth (see FIG. 2). In the vicinity of the bucket opening 9, a jaw crusher 13 for primary crushing the crushed material taken in from the bucket opening 9 to a predetermined size is provided (see FIG. 2).
A jaw crusher 13 is provided at the bottom of the bucket 8.
There is provided a rotary crusher 14 for secondary crushing of the material to be crushed primary by the cooperation of the rotary blade and the crushing plate so as to further reduce the diameter (see FIG. 2).

Next, the internal structure of the bucket 8 will be described with reference to FIGS. Jaw crusher 13
Has a fixed portion 15 fixed to the inner wall of the bucket, and a movable portion 18 supported by a rotating arm 17 provided rotatably about a support shaft 16 provided on the bucket 8. The movable portion 18 is connected to a cylinder rod 20 of a hydraulic cylinder 19 connected to a hydraulic circuit of the excavator 3 by a support shaft 21, and by operating the hydraulic cylinder 19, the rotating arm 17 is connected to the support shaft 16. Rotate to the center and move
Is moved toward and away from the fixed portion 15. Hydraulic cylinder 19
Is a partition room 2 in which the inside of the bucket 8 is partitioned by a partition plate 22.
3 and a spindle 24 provided in the bucket 8
Is mounted so as to be rotatable.

The fixed portion 15 has a fixed side crushing tooth 25 having a step-like height from the opening 9 side toward the back side (in this embodiment, 3 steps).
(Step). The height of the fixed side crushing teeth 25 can be arbitrarily adjusted by the spacer 26. Further, the movable portion 18 is formed with movable crushing teeth 27 so that the amount of protrusion becomes smaller from the opening 9 side toward the back side. As described above, the height of the fixed-side crushing teeth 25 of the fixing portion 15 is increased stepwise from the opening 9 side to the rear side because the fixed-side crushing teeth 25 are all at the same height when performing primary crushing. If there is a natural stone in the object to be crushed, the natural stone is sheared along the direction of the eyes, and falls along the gap between the movable side crushing teeth 27 toward the rotary blade and bites. May be difficult to crush. For this reason, the fixed-side crushed teeth 2 on the back side
The height of step 5 is increased stepwise so that the object to be crushed is fixed on the fixed portion 15 for a long time so that the particle size of the primary crushing is adjusted to be as small as possible. The fixed-side crushed teeth 25 can be replaced with ones having an arbitrary size and shape when worn.

5 (a) to 5 (c), the movable portion 18
The movable side crushing teeth 27 are formed on the surface facing the fixed portion 15. The movable-side crushing teeth 27 are formed in such a manner that claw-shaped protrusions 27a having a large protrusion amount are arranged in a staggered manner on the bucket opening 9 side, and three rows of protrusions 27b having a small protrusion amount are formed on the back side. The rotating arm 1 is provided on the opposite surface of the movable portion 18.
7 are connected to two places in the width direction. Rotating arm 17
A shaft hole 17a fitted into the support shaft 16 is formed at the end of the shaft. Further, side plates 28 are provided at two places in the width direction between the rotating arms 17, and through the openings of the side plates 28, shaft holes 28a into which the support shafts 21 to which the cylinder rods 20 are connected are fitted. Is formed. Further, the movable portion 18 is provided with a rib 29 so as to be orthogonal to the rotating arm 17 and the side plate 28.

In FIG. 2, the movable portion 18 is provided in a C-shape so that the distance between the fixed portion 15 and the opening 9 is wide and the distance between the movable portion 18 and the back side is narrowest. In the state where the movable part 18 is separated (opened), the interval between the movable part 18 and the fixed part 15 on the opening 9 side is, for example, about 450 mm. Is set to be, for example, about 75 mm on the back side with respect to the fixing portion 15. Thereby, the material to be crushed having a particle diameter of about 350 mm can be primarily crushed to 80 mm or less by shearing the movable side crushing teeth 27 and the fixed side crushing teeth 25. In order to adjust the particle size, the height of the crushing teeth 27 may be changed by the spacer 26.

In FIG. 2, the rotary crusher 14 converts the material to be crushed primary crushed by the jaw crusher 13 into a rotary blade 31, a first crush plate 32 and a second crush plate.
The secondary crushing is performed so as to further reduce the diameter by cooperation with the crushing plate 33. In FIG. 3, the rotary crusher 14
The rotary blades 31 are provided at a plurality of positions on the peripheral surface of the rotary shaft 34 in the axial direction.
The rotary blade 31 is provided coaxially with a rotary shaft 34 and is connected to a hydraulic circuit of the excavator 3 by a hydraulic motor 35.
, Thereby enabling normal and reverse rotation drive. As shown in FIG. 4, the rotary blade 31 is fitted into the rotary shaft 34 at a predetermined interval and fixed by welding. Hydraulic motor 35
Are provided on both sides of the rotating shaft 34, respectively.
a. The crushed material is discharged from a discharge port 8b formed at the bottom of the bucket 8.

In FIG. 2, the first crushing plate 32 and the second crushing plate 33 are provided at positions substantially facing the periphery of the rotary blade 31. In FIG. 3, the first crush plate 32
A plurality of projecting crushing ribs 37 having different heights are provided between partition plates 36 for partitioning the rotary blade 31 into a comb-like shape so as to be close to the cutting edge in the rotation direction of the rotary blade 31. ing. Specifically, in FIGS. 6A and 6B, the first
In the crushing plate 32, a partition plate 36 is welded to a first base plate 38 in a comb-tooth shape, and crushing ribs 37 are welded between the partition plates 36 at four places in this embodiment. Crushing rib 3
7 is welded between the partition plates 36 so as to approach the cutting edge of the rotary blade 31 in the rotation direction of the rotary blade 31. The first crush plate 32 is provided on the fixing member 3 provided on the bucket 8.
9 is fixed by bolting. In this embodiment,
The first crushing plate 32 shown in FIGS.
A plurality (for example, three places) are mounted side by side in one axial direction, but they may be formed integrally.

In FIG. 3, a second crush plate 33 is provided.
Is an inclined portion 4 between a partition plate 40 for partitioning the rotary blade 31 into a comb-like shape and approaching the cutting edge in the rotation direction of the rotary blade 31.
1 is provided. Specifically, in FIGS. 7A and 7B, the partition plate 40 is attached to the second base plate 42 by the rotary blade 31.
Are provided at predetermined intervals in a comb-like shape in the axial direction of the rotary blade 31. Between the partition plates 40, an inclination lower than the height of the partition plate 40 and approaching the cutting edge in the rotation direction of the rotary blade 31 is provided. A part 41 is formed. The second crush plate 33 is fixed to a fixing member 43 provided on the bucket 8 by bolting. The second crushing plate 33 reversely rotates the rotary blade 31 when removing foreign matter such as a reinforcing bar biting into the rotary blade 31 as described later. The outlet 8b (FIG. 4)
) To prevent it from falling into
Furthermore, the inclined portion 41 serves as a guide when pulling out the rebar or the like biting around the rotary blade 31 so as to facilitate pulling out.

Next, the hydraulic circuit 49 of the rotary crusher and the hydraulic circuit 50 of the jaw crusher will be described with reference to FIGS. The hydraulic pump used in the drive unit 4 of the excavator 3 is used, and the changeover switch and the foot valve are provided in the driver's cab 5.

Referring to FIG. 8, the construction of the hydraulic circuit 49 of the rotary crusher will be described. Reference numeral 51 denotes an operation pump, which circulates hydraulic oil with an oil tank 52. This operation pump 51 is different from the hydraulic cylinder 1 of the jaw crusher 13 described
Nine actuation pumps are also used. A safety valve 53 is provided at a take-out port for the hydraulic motor of the operation pump 51.

A changeover switch 54 uses a three-position changeover valve. This operator switches the changeover switch 54 on the driver's cab 5 to operate the operation pump 51.
The hydraulic oil sent from the hydraulic motor 35 is supplied to the hydraulic motor 35 of the bucket 8 or returned to the oil tank 52, and the rotation direction of the hydraulic motor 35 is switched between forward and reverse. Two hydraulic motors 35 are connected in parallel to the hydraulic circuit connected from the changeover switch 54 to the bucket 8 side. Further, between the changeover switch 54 and the hydraulic motor 35,
A throttle 55 and a check valve 56 are provided. The hydraulic oil pumped from the operating pump 51 via the changeover switch 54 flows clockwise or counterclockwise,
At that time, it flows through the throttle 55 into the hydraulic motor 35, flows out through the check valve 56, and returns to the oil tank 52.

Next, the hydraulic circuit 50 of the jaw crusher
Will be described with reference to FIG. Jaw crusher 1
As a drive source for operating the third hydraulic cylinder 19, as described above, the operation pump 51 provided in the drive unit 4 is also used by using an extraction port different from the hydraulic motor 35. Further, a safety valve 57 is provided at a take-out port for the hydraulic cylinder of the operation pump 51.

The drive unit 4 is provided with a control pump 58 for circulating hydraulic oil with the oil tank 52. The control pump 58 controls switching of a switching valve 60 provided in a hydraulic circuit between the operating pump 51 and the hydraulic cylinder 19. The switching valve 60 presses the a-side spool or the b-side spool by the hydraulic pressure of the control pump 58 and applies hydraulic pressure from the A-side connection port to the oil chamber 19a of the hydraulic cylinder 19 or the B-side connection port to the oil chamber 19b. The piston 61 is moved forward and backward. A cylinder rod 20 is connected to the piston 61, and the movable part 18 connected to the cylinder rod 20 is opened and closed with respect to the fixed part 15.

An operation-side switching valve 62 is provided at an outlet port of the control pump 58. The operation side switching valve 62 is a two-position switching valve, and is switched by a foot valve 63 provided in the driver's cab 5. Specifically, when the foot valve 63 is depressed, for example, to one side (R side), the control pump 58
When the operating oil is fed from the side connection port and the other side (S side) is depressed, the operation is switched so that the operating oil is fed from the B side connection port.

An opening / closing switching valve 64 is provided between the operation side switching valve 62 and the switching valve 60, and the opening / closing switching valve 64 is an electromagnetic valve (two-position switching valve). The open / close switching valve 64 is supplied with an operating voltage for exciting the solenoid from an electrical box 65 provided in the cab 5. The electrical box 65 is provided with a latching relay circuit 66, and the latching relay 67 is held in either the reset side or the set side.
As a result, the opening / closing switching valve 64 is switched to the reset side or the set side to feed the operating oil.
A power switch 68 is connected to the latching relay circuit 66. When the power switch 68 is turned on, the operating voltage of the open / close switching valve 64, for example, DC24
V is supplied. When the power switch 68 is turned off, the latching relay circuit 66 causes the open / close switching valve 64 to return to the reset side by the bias of the spring.

The operator can visually recognize whether the latching relay circuit 66 is turned on and whether the open / close switching valve 64 is on the reset side or the set side (ie, whether the jaw crusher 13 is open or closed). As such, the emitting diodes (LEDs) 69-71 are connected. The latching relay 67 of the latching relay circuit 66 is switched by detection signals from pressure switches 72 and 73 provided in the oil chambers 19a and 19b of the hydraulic cylinder 19. Specifically, the pressure switch 72 provided in the oil chamber 19a has a hydraulic pressure of, for example, 250 kgf / cm ^2.
Is detected, the latching relay 67 is switched to the set side. When the pressure switch 73 provided in the oil chamber 19b detects that the hydraulic pressure has reached, for example, 150 kgf / cm ² , the latching relay 67 is switched to the reset side. It is designed to be switched.

Next, the operation of the hydraulic circuit 49 and the hydraulic circuit 50 will be described. The operation pump 51 and the control pump 58 provided in the drive unit 4 of the excavator 3 are operated. When the changeover switch 54 is operated,
The hydraulic oil is pressure-fed to the hydraulic motor 35 and rotates (forward) in, for example, a counterclockwise direction, and the rotary blade 31 of the rotary crusher 14 rotates.

The operator turns on the power switch 68 mounted on the electrical box 65 of the cab 5. At this time, the latching relay 67 of the latching relay circuit 66 is held on either the set side or the reset side (depending on the state at the end of the crushing operation). In the case of the set side, when the operator steps on the foot valve 63 to the R side, the operating oil is sent from the control pump 58 through the A side connection port of the operation switching valve 62, and the opening / closing switching valve 64 through the B side connection port. Hydraulic oil is fed, the b-side spool of the switching valve 60 is pressed, and the hydraulic oil is pressure-fed from the operating pump 51 to the oil chamber 19b of the hydraulic cylinder 19 from the B-side connection port of the switching valve 60.
The piston 61 moves in the opening direction by hydraulic pressure, and the movable portion 18 of the jaw crusher 13 moves in the opening direction. When the piston 61 moves to the full opening direction and the pressure switch 73 detects that the oil chamber 19b has reached a predetermined set pressure, the latching relay 67 is switched to the reset side.

When the open / close switching valve 64 is switched to the reset side, the a-side spool of the switching valve 60 is pressed by the hydraulic pressure of the control pump 58, and the hydraulic pump is moved from the operating pump 51 to the A-side connection port of the switching valve 60. The hydraulic oil is pressure-fed to the oil chamber 19a, and the piston 61 moves in the closing direction by the hydraulic pressure, so that the movable portion 18 of the jaw crusher 13 moves in the closing direction. At this time, primary crushing of the crushed material is performed between the movable portion 18 and the fixed portion 15. When the pressure switch 72 detects that the oil chamber 19a has reached a predetermined set pressure while the piston 61 moves in the closing direction, the latching relay 67 is switched to the set side again, and the open / close switching valve 6 is opened.
4 is also switched to the set side. Thus, one open / close operation of the jaw crusher 13 is completed. When the operator continues to step on the foot valve 63 to the R side, the jaw crusher 13 repeats the same opening and closing operation. When the power switch 68 is turned on and the latching relay 67 is on the reset side, the opening and closing operation of the jaw crusher 13 is simply reversed.

Next, an operation of taking out the rebar or the like when the rebar or the like bites into the rotary blade 31 will be described. First, the power switch 68 of the electrical box 65 is turned off. Since the power of the latching relay circuit 66 is turned off, the solenoid of the open / close switching valve 64 is not excited, so that the switching valve 64 returns to the reset side by the elastic force of the spring. Here, when the S side of the foot valve 63 is depressed, the operation side switching valve 62 is switched, and hydraulic oil is sent from the control pump 58 to the B side connection port side. Then, the hydraulic oil presses the b-side spool of the switching valve 60 via the opening / closing switching valve 64, and switches the opening / closing switching valve 64 by this hydraulic pressure. At this time, the operating oil is pressure-fed from the operating pump 51 to the oil chamber 19b of the hydraulic cylinder 19 from the B-side connection port of the switching valve 60, so that the piston 61 moves in the opening direction by the hydraulic pressure, and the movable portion 18 of the jaw crusher 13 is moved. Moves in the opening direction.

If the pressure switch 73 detects that the piston 61 has moved to the full opening direction and the oil chamber 19b has reached a predetermined set pressure, the power switch 68 is turned off even if a switching signal is sent to the latching relay 67. Since the operation power is OFF, the open / close switching valve 64
Are held as they are on the reset side. In this state,
The jaw crusher 13 remains open even if the foot valve 63 is continuously depressed to the S side. Therefore, the operator releases his / her foot from the foot valve 63 when the jaw crusher 13 is opened. Even if you keep stepping without releasing your foot,
The safety valve 57 provided in the hydraulic circuit from 1 to the jaw crusher 13 opens and the hydraulic oil in the hydraulic circuit is
Therefore, the hydraulic circuit 50 is not damaged.

In this state, when the changeover switch 54 provided on the hydraulic circuit 49 is switched, the hydraulic motor 35 is rotated in the reverse direction, for example, clockwise, so that the rebar or the like bitten by the rotary blade 31 is moved to the opening 9 side of the bucket 8. Can be taken out.

Next, the crushing operation of the crusher will be described with reference to FIG.
This will be described with reference to FIG. The operator uses the cab 5
The operation of the bucket 8 is controlled via the arm 6 and the links 7 and 10 to scoop the crushed material into the bucket opening 9.
As shown in FIG. 10, the material to be crushed has a maximum diameter of M = φ350.
mm jaw crusher 1
3 performs primary crushing. The operation of the hydraulic cylinder 19 causes the rotating arm 17 supporting the movable portion 18 to rotate the support shaft 1.
6, and falls down to the bottom of the bucket 8 while being crushed by the movable side crushing teeth 27 provided on the movable part 18 and the fixed side crushing teeth 25 provided on the fixed part 15.
Since the hydraulic cylinder 19 is rotatably provided on the support shaft 24, the hydraulic cylinder 19 slightly rotates around the support shaft 24 together with the rotation of the rotation arm 17 when the cylinder rod 20 moves forward and backward. For this reason, the movable section 18 performs the primary crushing operation while sending the crushed object to the fixed section 15 to the inner side of the bucket 8. The crushed material primary crushed by the jaw crusher 13 is crushed to a maximum diameter of N = φ80 mm or less. In order to adjust the particle size of the primary crushed material, the height of the fixed-side crushing teeth 25 may be changed.

The crushed material primary crushed by the jaw crusher 13 is taken into the rotary crusher 14 and secondary crushed by the rotary blade 31 and the first and second crushing plates 32 and 33. Specifically, as shown in FIG. 11A, the particle size of the crushed material between the rotary blade 31 and the crushing ribs 37 having different heights provided on the first crushing plate 32 has a maximum diameter of φ80 mm. From φ60, φ55, φ45, φ
Secondary crushing to gradually reduce the diameter to 35 mm or less,
Discharge port 8b provided at the bottom of bucket 8 (see FIG. 4)
Is more exhausted. For the first crushing plate 32, one having different heights of the crushing ribs 37 is prepared (FIG. 11B).
(See (d)), the particle size of the secondary crushed material can be adjusted by increasing or decreasing the number of crushing ribs 37. When the rotating blade 31 is rotated in the reverse direction in order to take out the rebar or the like bitten by the rotating blade 31 from the bucket opening 9 side, the crushed object does not pass through the first crushing plate 32 and the second crushing plate 33 does not pass.
However, those having a certain particle size or more cannot pass through the inclined portion 41. Therefore, the material to be crushed is not discharged from the outlet 8b without being secondarily crushed.

When the rotary blade 31 is chipped or worn, the secondary crushing performance of the rotary blade 31 can be maintained by overlaying the blade edge by welding and then performing blade cutting.

Next, another configuration of the rotary crusher 14 will be described with reference to FIGS. FIG.
2A and 2B, the first crushing plate 81 and the second crushing plate 82 are provided at positions substantially facing the periphery of the rotary blade 31. 13A and 13B, the first crushing plate 81 is a partition plate 83 that partitions the rotary blade 31 into a comb-like shape.
Between the rotating blade 31 and the rotating blade 31
A crushing portion 85 having a crushing surface 84 that is close to the cutting edge in the rotation direction (counterclockwise direction in FIG. 12A) is provided.

More specifically, the first crush plate 81 is formed as shown in FIG.
As shown in (a), the crushing portion 85 is fixed to the fixing member 39 provided on the bucket 8 by bolting.
13 (a) and 13 (b), each partition plate 83 has a crushing portion 8
5 are provided so as to be divided into comb teeth. Divider 83
The members are screwed to the bolts 86 and reinforced. Also,
The partition plate 83 and the crushing portion 85 are integrally reinforced by fitting a pin 87 therein. In addition, the crushing surface 84 is
It has an R-shape so as to approach the cutting edge of the rotary blade 31 in the direction of rotation 1. As an example, in FIG. 12A, the particle size of the primary crushed
When passing between the crushing surface 84 and the crushing surface 84, the distance is adjusted so that the secondary crushing can be performed from about 80 mm to about 45 mm. The distance between the partition plate 83 and the rotating shaft 34 is designed to be φ45 mm, which is the particle size after secondary crushing.

As described above, since the crushing portion 85 has the continuous crushing surface 84 which is close to the cutting edge of the rotary blade 31 in the rotation direction of the rotary blade 31, the crushed material after the secondary crushing has a small particle size. Can be reduced. Also,
For example, there is little possibility that a reinforcing bar or the like is bitten by the rotary blade 31, and even if bitten, the crushing surface 84 has no portion that is easily caught in the rotation direction.
By reversing 1, rebar etc. can be taken out smoothly.

In FIGS. 14A and 14B, the second
The crushing plate 82 is a partition plate 8 for partitioning the rotary blade 31 into a comb shape.
8, an inclined portion 89 is provided near the cutting edge in the rotation direction of the rotary blade 31. Specifically, the partition plates 88 are provided at predetermined intervals in a comb-like shape, and the height between the partition plates 88 is lower than that of the partition plates 88 and approaches the cutting edge in the rotation direction of the rotary blade 31. Such an inclined portion 89 is formed. In FIG. 14 (c), the partition plate 8
A part of 8 is formed on the R surface to adjust the interval with the rotary blade 31 to a predetermined interval. The distance between the partition plate 88 and the rotary blade 31 and the distance between the partition plate 88 and the rotary shaft 34 are set to φ18 mm for the former and φ45 mm for the latter in terms of the particle size of the secondary crushed material. The particle size of the secondary crushed material that can pass between the rotary blade 31 and the inclined portion 89 is also set to be a maximum of φ45 mm, so that the secondary crushed material is discharged from the bucket 8. To encourage you. When removing a foreign object such as a reinforcing bar that has been bitten by the rotary blade 31, the rotary blade 31 is rotated in the reverse direction.
Of the second crushing plate 82 falling into the discharge port 8b (see FIG. 4) without being secondarily crushed between the crushing plate 81 and the crushing plate 81.
, And furthermore, it is possible to easily pull out the rebar or the like biting around the rotary blade 31 along the inclined portion 89.

According to the above configuration, the crushed material taken into the bucket 8 is primarily crushed by the jaw crusher 13, and the crushed material that has been primary crushed is secondarily crushed by the rotary crusher 14 so as to have a smaller diameter. Since the crushed material is discharged, a large amount of the crushed material having various sizes is taken into the bucket 8 so that the crushing process can be efficiently performed, and the particle size of the crushed material can be accurately and uniformly adjusted. Therefore, the crushed material can be efficiently processed at a construction site and the crushed material can be easily reused. In particular, even if the particle size of the primary crushed material by the jaw crusher 13 is set large, the rotary crusher 14
, A large amount of material to be crushed is taken into the bucket 8 and crushing can be performed efficiently. The rotary blade 31 provided on the rotary crusher 14 is provided with a hydraulic motor 35.
In this case, even if the rotary blade 31 is caught by a foreign object such as a reinforcing bar, the jaw crusher 13 can easily take out the movable member 18 by opening the movable part 18 and the hydraulic motor 35 in reverse. So easy to use.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiments, and the crushing device is provided in connection with the arm 6 of the excavator 3 or the like. However, the present invention is not limited to this case. For example, the bucket 8 may be installed and used on an installation surface of a construction site. In this case, it is necessary to operate the jaw crusher 13 and the rotary crusher 14 using a dedicated hydraulic circuit for the bucket 8. In addition, the particle size of the material to be crushed by the jaw crusher 13 and the rotary crusher 14 is not limited to the example, and various modifications can be made without departing from the spirit of the invention. It is.

[0042]

According to the present invention, the object to be crushed taken into the bucket as described above is primarily crushed by a jaw crusher,
The primary crushed material is secondarily crushed and discharged by a rotary crusher so as to further reduce the diameter, so that crushed materials of various sizes can be efficiently taken into a bucket in a large amount, and The particle size of the crushed material can be accurately and uniformly adjusted. Therefore, the crushed material can be efficiently processed at a construction site and the crushed material can be easily reused. In particular, even if the particle size of the primary crushed material by the jaw crusher is set large, since the secondary crushing is performed by the rotary crusher, a large amount of the crushed material can be taken into the bucket and the crushing process can be efficiently performed. In addition, since the rotary blade provided on the rotary crusher can be driven forward and reverse by a hydraulic motor, even if a foreign object such as a reinforcing bar is bitten by the rotary blade, the opening operation of the movable part by the jaw crusher and the reverse rotation operation of the hydraulic motor are linked. By doing so, it can be easily taken out, so that it is easy to use.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a hydraulic shovel equipped with a crushing device.

FIG. 2 is an explanatory view of a crushing device.

FIG. 3 is a cross-sectional view in the direction of arrows ABCD in FIG. 2;

FIG. 4 is a partial explanatory diagram viewed from the direction of arrow E in FIG. 2;

FIG. 5 is a front view, a top view, and a bottom view of the movable portion of the jaw crusher.

FIG. 6 is a front view and a right side view of a first crush plate of the rotary crusher.

FIG. 7 is a front view and a right side view of a second crush plate of the rotary crusher.

FIG. 8 is an explanatory diagram of a hydraulic circuit of the rotary crusher.

FIG. 9 is an explanatory diagram of a hydraulic circuit of the jaw crusher.

FIG. 10 is an operation explanatory view of the crushing device.

FIG. 11 is an explanatory diagram of a secondary crushing operation by the rotary blade and the first crushing plate.

FIG. 12 is a side view and a front view of a secondary crushing operation of a rotary crusher according to another example.

FIG. 13 is a front view and a right side view of the first crush plate.

FIG. 14 is a front view, a right side view, and a side view of a partition plate of a second crush plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 2 Traveling device 3 Excavator 4 Drive unit 5 Cabinet 6 Arm 7, 10 Link 8 Bucket 8a Cover 8b Discharge port 9 Bucket opening 11 Pin 12 Side cutter 13 Jaw crusher 14 Rotary crusher 15 Fixed part 16, 21, 24 Support shaft 17 Rotating arm 18 Movable part 19 Hydraulic cylinder 19a, 19b Oil chamber 20 Cylinder rod 22 Partition plate 23 Partition chamber 25 Fixed side crushing teeth 26 Spacer 27 Movable side crushing teeth 28 Side plate 29 Rib 31 Rotating blade 32, 81 1 crush plate 33, 82 second crush plate 34 rotating shaft 35 hydraulic motor 36, 40, 83, 88 partition plate 37 crush rib 38 first base plate 39, 43 fixing member 41, 89 inclined portion 42 second Base plate 49, 50 Hydraulic circuit 51 Operating pump 52 Oil Tanks 53, 57 Safety valve 54 Switching switch 55 Throttle 56 Check valve 58 Control pump 60 Switching valve 61 Piston 62 Operating side switching valve 63 Foot valve 64 Opening / closing switching valve 65 Electrical box 66 Latching relay circuit 67 Latching relay 68 Power switch 69, 70 , 71 LED 72, 73 Pressure switch 84 Crushing surface 85 Crushing part 86 Bolt 87 Pin

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Nobuhito Kuribayashi 3039 Sasaga, Matsumoto City, Nagano Prefecture Inside Izumi Seiki Seisakusho Co., Ltd. Within Sangyo Co., Ltd.

Claims (9)

[Claims] 1. A crushable material such as a building waste material is taken in from an opening and accommodated therein, and a crushable material is discharged from a bottom portion, and a crushable material provided near the bucket opening and taken into the bucket is provided. A jaw crusher for primary crushing to a size of; and a rotary crusher for secondary crushing of the object to be crushed primary crushed by the jaw crusher to a smaller diameter by cooperation of a rotary blade and a crushing plate. Crushing equipment characterized. 2. The jaw crusher has fixed-side crushing teeth and is fixed to the inner wall of the bucket, and has a movable-side crushing tooth and is rotatable around a support shaft provided on the bucket. A movable portion supported by a provided rotating arm, wherein the movable portion is connected to a cylinder rod of a hydraulic cylinder connected to a hydraulic circuit, and the hydraulic cylinder is operated to connect the movable portion to the fixed portion. The crushing device according to claim 1, wherein the crushing device is moved toward and away from the crushing device. 3. The movable part is formed with the movable side crushing teeth such that a protruding amount becomes smaller from an opening side to a depth side, and the fixed part is formed from an opening side to a depth side. The crushing device according to claim 2, wherein the fixed-side crushing teeth are formed so as to have a higher height. 4. The rotary crusher is provided with rotary blades at a plurality of positions in an axial direction on a peripheral surface of a rotary shaft, and can be driven forward and reverse by a hydraulic motor connected to a hydraulic circuit. The crushing device according to claim 1, wherein 5. A first crushing plate is provided around the rotary blade, and the first crushing plate is provided between partition plates for partitioning the rotary blade into a comb shape in a rotation direction of the rotary blade. The crushing device according to claim 4, wherein a plurality of projecting crushing ribs having different heights are provided so as to approach the cutting edge. 6. A first crushing plate is provided around the rotary blade, and the first crushing plate is provided between partition plates for partitioning the rotary blade into a comb shape in a rotation direction of the rotary blade. The crushing device according to claim 4, further comprising a crushing surface that is continuous and is close to the cutting edge in the rotation direction of the rotary blade. 7. A second crush plate is provided at a position around the rotary blade and substantially opposite to the first crush plate, and the second crush plate makes the rotary blade comb-shaped. 6. An inclined portion which is provided between the partitioning plates, and which is close to the cutting edge in the rotation direction of the rotary blade.
Or the crushing device according to claim 6. 8. The excavator according to claim 1, wherein the bucket is replaceably provided on an excavator arm and a link tip, and the jaw crusher and the rotary crusher are operated using a hydraulic circuit of the excavator. 2, 3,
The crushing device according to claim 4, 5, 6, or 7. 9. The bucket according to claim 1, wherein the bucket is installed on an installation surface, and the jaw crusher and the rotary crusher are operated using a dedicated hydraulic circuit for the bucket. The crushing device according to claim 5, 6, or 7.