JPH034359Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention involves attaching ripper foils to the outer peripheries of two or more rotating shafts, and crushing large scraps such as press material for automobile bodies between the ripper foils. This is related to a crusher that does

[Conventional technology]

In conventional shredding machines, the spacing between the rotating shafts remains constant, and large scraps are crushed by being caught between the ripper wheels fixed to each shredding machine, but in the case of overload, the motor that drives the rotating shafts Since the current consumed by the motor becomes excessive, this is detected and the motor is stopped to prevent burnout of the motor and damage to the ripper foil, etc.

[Problem that the invention attempts to solve]

As mentioned above, conventional shredding machines stop the rotating shaft in the event of overload, which prevents burnout of the motor and damage to the ripper foil, but the ripper foil stops with scrap still trapped in it.

Therefore, the operation of the crusher cannot be resumed until after the trapped material has been removed, which is a problem in that it is labor-intensive and results in a large loss of time.

[Means for solving problems]

In order to solve the above problems, this invention uses at least one rotating shaft of the crusher as a movable rotating shaft that can move toward and away from the other rotating shaft. The two rotating shafts are supported by a support means that maintains a constant spacing within a certain limit, and expands the spacing between the two rotating shafts when the load applied to the two rotating shafts exceeds a certain limit. A push-back member is provided that operates in conjunction with the support means of the movable rotating shaft to push back the material to be crushed that is about to be discharged from the discharge port into the crushing chamber and subject it to a re-shredding action.

[Effect]

Since this device has the above-mentioned configuration, during normal operation, each rotating shaft maintains a certain distance necessary for crushing, crushes the scraps caught between the ripper foils, and discharges them from the discharge port at the bottom. There is. Further, at this time, the push-back plate is located at a position where it does not interfere with the discharge of the crushed material.

However, if a large load is applied to the rotating shaft due to a large object being crushed that is difficult to crush, etc.
The support means supporting the movable rotating shaft acts,
This movable rotating shaft is moved in a direction away from the other rotating shaft.

Therefore, the distance between the two ripper foils is widened, and the overload applied to the rotating shaft from the two ripper foils is eliminated. When the overload is eliminated in this way, the movable rotating shaft returns to its original position.

Further, as described above, at the same time as the support means for the movable rotating shaft operates, the push-back member provided at the discharge port operates to push back the large object to be crushed that is about to be discharged from the discharge port, so that re-shredding is performed.

〔Example〕

In the figure, reference numeral 1 denotes a crushing chamber having an input port 3 at the top and surrounded by side walls 2. Oblique inclined walls 4 are provided on both sides of the lower end of the crushing chamber 1, and an outlet for discharging crushed materials is provided between them. 5.

6 is a rotating shaft provided near the front of the lower part of the crushing chamber 1;
The rotating shafts are located at the rear of the lower part and are hollow with a large diameter. Both ends of each shaft have a small diameter and are supported by bearings 8 and 9 provided on the side wall 2.

The rotating shaft 6 is movable, and both ends thereof are connected to the third
As shown in the figure, it passes through a long hole 10 provided in the side wall 2 and is supported by a bearing 8, which is attached to the frame 13.
It can move forward and backward along the upper guide rail 11.

A is a support means for the movable rotating shaft 6, and in the illustrated case, it is a spring type. In this case, the guide shaft 12 is fixed to the bearing 8, and the guide shaft 12 is attached to the frame 13.
A sliding frame 16 is attached to the guide hole of the bracket 15 fixed to the outer end of the bracket 15 and the guide rail 11 so as to be able to move forward and backward.
Slide into the guide hole.

A bracket 1 is attached to the external male thread of the guide shaft 12.
A nut 18 on the outside of the bracket 15 and a nut 19 on the outside of the reciprocating frame 16 are screwed in, and a coiled spring 21 is fitted on the outside of the guide shaft 12 between the bracket 15 and the retracting frame 16.

A ripper foil 22 is fixed to the outer periphery of each shaft 6, 7 as shown in FIG. 2, and a large number of teeth 23 are provided on the outer periphery of the ripper foil 22.
This tooth 23 is provided with a knife edge 24.

Also, one end of each shaft 6, 7 protrudes through the bearing, and although not shown, each of the protruding shafts 6,
7 is driven by a drive mechanism consisting of an interlocking mechanism such as a pulley and a belt or a sprocket and a chain, and a motor.

Reference numeral 25 in FIG. 2 is a push-back member, which moves around a shaft 26 from the position indicated by the solid line in the figure to the position indicated by the chain line.
27 is its driving means.

The driving means 27 uses a hydraulic cylinder or the like, and is linked to the movement of the movable rotating shaft 6. That is, if the driving means A of the bearing 8 is a spring type, the movement of the bearing 8 or the advancing/retracting frame 16 is detected by a limit switch or the like, and a signal is sent to the control circuit of the driving means 27 to move the push-back member 25 to the position indicated by the chain line. move.

This invention has the above-mentioned structure, and when a large object to be crushed, such as an automobile body, is thrown into the input port 3 from a chute or the like, it gets caught in the ripper foil 22 of the rotating shafts 6 and 7 rotating in the direction of the arrow in FIG. be included.

The object to be crushed caught between the ripper wheels 22 of the rotating shafts 6 and 7 is torn and crushed by the teeth 23 of the ripper wheels 22, and is discharged from the discharge port 5.

The spring 21 of the support means in FIG.
is pushed to the left in the figure, and the forward/backward frame 16 is pushed to the right, but the bracket 15 does not move, so the forward/backward frame 1
6 pushes the guide shaft 12 to the right via the nut 19. Therefore, since the guide shaft 12 is held at the position where the nut 18 contacts the bracket 15, the distance between the rotating shafts 6 and 7 can be adjusted by adjusting the position of the nut 18 with respect to the guide shaft 12.

During normal crushing, the rotating shafts 6 and 7
The distance between the rotating shafts 6 and 7 is maintained at a constant interval by the nuts 18, but due to reasons such as a large object being crushed that is difficult to crush thrown between the ripper foils 22, the rotation shafts 6 and 7
When an excessive load is applied to the spring 21, the load is transmitted to the spring 21 via the bearing 8, the guide shaft 12, the nut 19, and the movement frame 16.

Therefore, the rotating shaft 6 compresses the spring 21 and moves to open the space between the rotating shafts 6 and 7, so that the overload is removed.

Further, as described above, when the bearing 8 and the advancing/retracting frame 16 move due to overload, the driving means 27 is activated, and the push-back member 25 is moved to the position shown by the solid line in FIG.
Push up to the position indicated by the chain line.

Therefore, large objects to be crushed that have fallen into the discharge port 5 without being crushed from between the enlarged rotating shafts 6 and 7 are pushed back into the crushing chamber 1 by the push-back member 25, and the restored rotating shafts 6, 7 Ritupa foil 2
2, it is subjected to crushing action again.

Even if the rotating shaft 6 is restored, the driving means 27 maintains the position indicated by the chain line in FIG. 2 for a preset time using a timer or the like, so that it remains in the same position until the re-crushing is completed.

Although the embodiment shows the case where the support means A is a spring type, if the support means A is a power type such as a hydraulic cylinder or an air cylinder, the current consumption value of the drive motor of the rotating shafts 6 and 7 can be reduced in the event of an overload. By detecting the change or the hydraulic pressure applied to the hydraulic cylinder, the supporting means A is activated and at the same time the drive means 27 is activated to perform the same action as described above.

Further, although the above embodiment shows a case where there are two rotating shafts, there may be a case where there are three rotating shafts.

〔effect〕

In this invention, as mentioned above, at least one of the rotating shafts is a movable rotating shaft that can move toward and away from the other rotating shaft, and this movable rotating shaft is supported by a support means that uses a spring or fluid pressure. ,
As long as the load applied to the rotary shafts is within a certain limit, the distance between them will be maintained, allowing for normal crushing.If the load applied to both rotary shafts exceeds a certain limit, the distance between the two rotary shafts will increase, which will prevent excessive stress from being applied to the rotary shafts. The load is eliminated and motor burnout and tripper damage can be prevented. Further, as described above, when the distance between the rotating shafts is increased, the cause of the overload is automatically removed, so the overload applied to the rotating shafts is automatically removed. In addition, large objects that cannot be crushed will be discharged from the outlet without being crushed.
In the case of this device, there is a push-back member at the discharge port, and this member pushes back the crushed materials discharged during overload and narrows the discharge port, so large crushed materials are not returned to the crushing chamber. undergoes re-shredding. Therefore, the operating rate of the crusher is improved, and an excellent crusher is obtained in which large objects to be crushed are not discharged as they are.

[Brief explanation of the drawing]

FIG. 1 is a side view of this invention, FIG. 2 is an enlarged vertical sectional side view of the same, and FIG. 3 is a partially cutaway cross-sectional plan view of the same. 1... Crushing chamber, 3... Inlet, 5... Outlet,
6, 7...Rotating shaft, 22...Ritupa foil, 25
...Pushing back member, 27...Driving means, A...Supporting means.

Claims (1)

[Scope of utility model registration request] In a crusher in which a plurality of horizontal rotation shafts are provided in a crushing chamber having an input port for crushed materials at the top and a discharge port for crushed materials at the bottom, and a plurality of ripper foils are fixed to each rotation shaft, at least one of the The rotary shaft is a movable rotary shaft that can move toward and away from the other rotary shaft, and the movable rotary shaft maintains a constant interval when the load applied to both rotary shafts is within a certain limit, and the movable rotary shaft maintains a constant interval when the load applied to both rotary shafts When a certain limit is exceeded, the movable rotary shaft is supported by a support means that acts to widen the distance between the two rotary shafts, and when an overload occurs, the movable rotary shaft is connected to the support means for discharging the movable rotary shaft from the discharge port. This crusher is equipped with a push-back member that operates to push back the material to be crushed into the crushing chamber and subject it to re-shredding action.