SHREDDER DEVICE FOR SHREDDING MATERIAL

Abstract

A shredder device for shredding materials, in particular recyclable material, waste wood and date storage devices, comprises a machine frame, at least one shredder rotor rotatably supported on the machine frame, and at least one feed device for conveying the material to be shredded to the at least one shredder rotor. At least one measuring device for continuously detecting a position of the at least one feed device, a control and/or regulating device for controlling and/or regulating a movement of the at least one feed device, and a signal transmitting device are provided. Measuring signals generated by the at least one measuring device can be supplied to the control and/or regulating device by the signal transmitting device.

Claims

1. A shredder device for shredding material, in particular recyclable materials, waste wood and date storage devices, the shredder device comprising a machine frame, at least one shredder rotor rotatably supported on the machine frame, and at least one feed device for conveying the material to be shredded to the at least one shredder rotor, wherein at least one measuring device for continuously detecting a position of the at least one feed device, a control and/or regulating device for controlling and/or regulating a movement of the at least one feed device, and a signal transmitting device are provided, and measuring signals generated by the at least one measuring device can be supplied to the control and/or regulating device by the signal transmitting device.

2. The shredder device according to claim 1, wherein the at least one feed device is configured to be moved between a first end position and a second end position, the at least one measuring device being configured to continuously detect a position of the at least one feed device between the two end positions.

3. The shredder device according to claim 1, wherein at least one hydraulic cylinder-piston-device for moving the at least one feed device is provided, the at least one cylinder-piston-device including at least one inlet and at least one outlet for a hydraulic fluid, and the at least one measuring device for continuously detecting a position of the at least one feed device is configured to measure a volume flow of the hydraulic fluid in the inlet and/or in the outlet.

4. The shredder device according to claim 1, wherein the at least one measuring device for continuously detecting a position of the at least one feed device is configured as a path measuring device, wherein it is preferably provided that the path measuring device includes a cable potentiometer.

5. The shredder device according to claim 1, wherein the at least one measuring device for continuously detecting a position of the at least one feed device is configured to measure a rotation angle, wherein it is preferably provided that the measuring device includes a rotary encoder, and/or that the at least one feed device is rotationally supported on the machine frame and the measuring device is configured to measure a rotational angle of the at least one feed device.

6. The shredder device according to claim 1, wherein the at least one feed device is rotationally supported about a rotational axis, preferably on sidewalls of the shredder device, the at least one feed device being configured to convey the material to be shredded to the at least one shredder rotor by a rotational movement about the rotational axis.

7. The shredder device according to claim 1, wherein the shredder device includes a material delivery chamber for supplying material to be shredded to the shredder device.

8. A process of operating the shredder device according to claim 1, comprising the following process steps: the at least one feed device is moved, preferably between a first end position and a second end position, the at least one measuring device generates measuring signals corresponding to the actual position of the at least one feed device, preferably between the two end positions, the measuring signals generated by the at least one measuring device are supplied to the control and/or regulating device by the signal transmitting device, and the actual position of the at least one feed device is determined by the control and/or regulating device based on the measuring signals.

9. The process according to claim 8, wherein the at least one feed device is moved by at least one hydraulic piston-cylinder-device, the at least one hydraulic piston-cylinder-device being supplied with a hydraulic fluid via at least one inlet and at least one outlet, and the at least one measuring device measures a volume flow of the hydraulic fluid in the inlet and/or in the outlet.

10. The process according to claim 8, wherein the at least one measuring device measures a path covered by the at least one feed device, preferably relative to at least one end position.

11. The process according to claim 8, wherein the at least one measuring device measures a rotational angle, wherein it is preferably provided that the at least one feed device is moved between two end positions, thereby performs a rotational movement and the at least one measuring device measures a rotational angle of the at least one feed device.

12. The process according to claim 8, wherein a speed of the at least one feed device is determined by the control and/or regulating device based on the measuring signals generated by the at least one measuring device, wherein it is preferably provided that a removal performance of the material is determined from the speed.

13. The process according to claim 12, wherein the determined speed is compared to a reference speed, wherein it is preferably provided that for the case that the at least one feed device is moved by at least one hydraulic piston-cylinder-device, a deflection of a control slider is adapted upon a deviation of the detected speed from the reference speed.

14. The process according to claim 12, wherein the speed is compared to at least one predetermined threshold value, wherein it is preferably provided that the control and/or regulating device stops a movement of the at least one feed device upon reaching the at least one threshold value, or initiates a movement of the at least one feed device in the opposite direction, and/or starts a cleaning procedure for the at least one shredder rotor upon repeatedly reaching the threshold value, wherein it is preferably provided that the rotational direction of the at least one shredder rotor is reversed and the at least one feed device is pressed against the at least one shredder rotor.

15. The process according to claim 8, wherein the control and/or regulating device varies a position of an end position of the at least one feed device.

16. The process according to claim 8, wherein the control and/or regulating device determines a change of a path covered by the at least one feed device based on the measuring signals generated by the at least one measuring device, wherein it is preferably provided that the change of the path is compared to a predetermined threshold value and, in the case of reaching the at least one threshold value, the movement direction of the at least one feed device is reversed.

17. The process according to claim 8, wherein the control and/or regulating device transmits a malfunction detected by the control and/or regulating device based on easuring signals generated by the at least one measuring device to at least one indicator device, wherein it is preferably provided that the at least one an indicator device includes a display screen.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Further details and advantages of the invention will be explained in the following description of figures with reference to the drawings, in which:

[0046] FIG. 1 shows a shredder device for shredding material in a schematic perspective view,

[0047] FIG. 2 is a cross-sectional view of the shredder device according to FIG. 1,

[0048] FIG. 3 is a side view of a shredder device according to the prior art, with a part of the side cover having been omitted in this view,

[0049] FIG. 4 is a side view of a shredder device according to the invention in a first preferred embodiment, with a part of the side cover having been omitted in this view,

[0050] FIG. 5 is a side view of a shredder device according to the invention in a second preferred embodiment, with a part of the side cover having been omitted in this view, and

[0051] FIG. 6 is a side view of a shredder device according to the invention in a third preferred embodiment, with a part of the side cover having been omitted in this view.

DETAILED DESCRIPTION OF THE INVENTION

[0052] FIG. 1 shows a shredder device 1 having a machine frame 2. The machine frame 2 can include a basic framework, a support device for supporting the shredder device 1 on the ground, wall portions or claddings to the outside.

[0053] Material to be shredded is fed to the shredder device 1 by a material delivery chamber 20. In addition, a feed device 4 is rotationally supported about a rotational axis 22 on the sidewalls of the shredder device 1. The feed device 4 conveys the material to be shredded further to a shredder rotor 3 (cannot be seen in FIG. 1).

[0054] As can be seen from the sectional view according to FIG. 2, the feed device 4 includes a pusher 24 having a pushing surface 33. For example, the pusher 24 can be configured so as to be substantially wedge-shaped in a cross-section. The pusher 24 is connected to a pivot point 34 by two levers 23 spaced from one another.

[0055] Instead of such a pivotable feed device 4, a linearly displaceable feed device may also be employed.

[0056] The pusher 24 or, respectively, the feed device 4 moves along a wall portion 21, namely between a first end position 5 and a second end position 6. The first end position 5 is arranged adjacent to a shredder rotor 3 and the second end position 6 is spaced therefrom. Thereby, the pusher 24 or, respectively, the feed device 4 can assume any position between these two end positions 5 and 6. The positions through which the device passes in that case are indicated by a dash-dotted line 35. In order to move the pusher 24 or, respectively, the feed device 4 from the first position 5 into the second end position 6, the pusher 24 rotates about the pivot point 34 in an anticlockwise direction, in the view shown in FIG. 2. The reverse movement takes place in the clockwise direction. The directions of movement of the pusher 24 or, respectively, the feed device 4 are indicated by a double-headed arrow 18.

[0057] The feed device 4 is driven by two hydraulic piston-cylinder-devices 15, each having a cylinder 29 and a piston movable therein, the piston having a piston rod 30. In the illustrated case, the cylinder 29 is arranged on the machine frame 2. The piston rod 30 is hingedly connected to the lever arm 23 via an intermediate lever 25. Of course, a reversed configuration may also be used, in which the piston rod 30 is arranged on the machine frame 2 and the cylinder 29 acts on the intermediate lever 25.

[0058] The piston-cylinder-device 15 and the intermediate lever 25 are each arranged in a sidewall of the shredder device 1. The intermediate lever 25 is connected to the lever arm 23 in a torque-proof manner.

[0059] The material conveyed by the feed device 4 to the shredder rotor 3 is shredded by cutting devices arranged at a periphery of the shredder rotor 3 and stationary counterpart blades 26, more specifically until the material is at a given degree of shredding which is adjustable by a sieve device 27. Via the sieve device 27, the shredded material reaches to the outside and can be carried away, for example by conveyor belts.

[0060] The shredder rotor 3 is rotationally supported about a pivot point 36 on the machine frame 2. The directions of rotation are denoted with the reference number 17 and with a double-headed arrow.

[0061] As already stated in the opening part of this specification and as shown in FIG. 3, the prior art provides that the presence of the feed device 4 can be detected in one of the two end positions 5 and 6 by two stationary sensors 28 which can be in the form of inductive sensors. The sensors 28 are connected to a control and/or regulating device 10 by a signal transmitting device 11. The position of the at least one feed device 4 between these two end positions 5 and 6 cannot be detected. The disadvantages connected therewith have been explained in detail hereinbefore. It is not excluded that such sensors can also be employed with the present invention.

[0062] FIG. 4 shows a first preferred embodiment of the shredder device 1 or, respectively, the process for operating the shredder device 1. Thereby, the supply of the hydraulic piston-cylinder-device 15 is effected by a hydraulic fluid via an inlet 12 and an outlet 13. The hydraulic fluid can be stored in a tank 31 which communicates with the inlet 12 and the outlet 13 by a pump 37 and a proportional valve 32. There is now provided a measuring device 7, the measuring device 7 being configured to measure a volume flow of the hydraulic fluid in the inlet 12 and in the outlet 13. The measuring signals are forwarded to the control and/or regulating device 10 by a signal transmitting device 11. In the control and/or regulating device 10, the position of the feed device 4 between the two end positions 5 and 6 is continuously detected based on the provided measuring signals.

[0063] FIG. 5 shows a second preferred embodiment of the shredder device 1 or, respectively, the process for operating the shredder device 1. Thereby, a path measuring device 8 is employed, the path measuring device 8 including a cable potentiometer in the depicted case. With this path measuring device 8, a path 16 covered by the feed device 4 relative to the end positions 5 and 6 can be measured. The measuring signals are forwarded to the control and/or regulating device 10 by a signal transmitting device 11. In the control and/or regulating device 10, the position of the feed device 4 relative to the two end positions 5 and 6 can be continuously detected based on the provided measuring signals.

[0064] FIG. 6 shows a third preferred embodiment of the shredder device 1 or, respectively, the process for operating the shredder device 1. Thereby, a measuring device 9 is employed, the measuring device 9 being configured to measure a rotational angle 14 of the feed device 4, and the measuring device 9 includes a rotary encoder. The measuring signals are forwarded to the control and/or regulating device 10 by a signal transmitting device 11. In the control and/or regulating device 10, the position of the feed device 4 between the two end positions 5 and 6 can be continuously determined based on the provided measuring signals.

[0065] The position of the feed device 4 determined thereby serves as a starting point for the advantageous embodiments described hereinbefore of the process for operating the shredder device 1.

[0066] The control and/or regulating device 10 can be connected in a signal-conducting manner to an indicator device 19 in order to provide information to a user of the shredder device 1, for example about malfunctions which cannot be automatically resolved.

[0067] It is not necessary to arrange the measuring devices 28, 7, 8 and 9 indicated in the figures on the depicted locations of the feed device 4. Any appropriate location can be used here. It is also not mandatory that the measuring devices 28, 7, 8 and 9 are directly coupled to the at least one feed device 4. For example, an arrangement in a wall, along which the at least one feed device 4 moves, is also possible. A configuration in the form of a magneto-resistive sensor can be used here.