KR20040101910A - Wood crusher and control method thereof - Google Patents

Abstract

PURPOSE: A wood crusher, having a load detector and a controller, and a method for controlling the same are provided to improve the operation ratio by reducing the number of a crushing stop states, and to allow the combination work with a second processing machine. CONSTITUTION: The wood crusher includes: a hopper(12) to be input with woods; a crusher(15), crushing the woods; a wood feeding device(13), feeding the woods inside the hopper(12) to the crusher(15); a crusher load detector, detecting the load of the crusher(15); and a controller(20), controlling the feeding speed of the wood feeding device(13) according to the crusher load which is detected by the crusher load detector. The controller(20) evaluates the detected crusher load level in a stepwise manner and controls the feeding speed of the wood feeding device(13) according to load the level of each step.

Description

Wood shredder and control method of wood shredder {WOOD CRUSHER AND CONTROL METHOD THEREOF}

The present invention relates to a wood shredder and a control method of the wood shredder.

Pruned eggplants and pruned lumbers of felled wood, eggplant lumbers generated from maintenance of compositional lands, or waste woods generated from deconstruction, etc., to break down or crush the wood chips to reduce capacity as industrial waste (hereinafter, simply It is conventionally widely practiced to ferment and treat chips as organic fertilizers. For this reason, although wood shredders are frequently used, these wood shredders generally include a shredder having a rotary cutter having a cutter (shred bit) on its outer periphery, a hopper (or tab) for storing wood of the shredded material, and the hopper (or And a conveying apparatus for conveying and supplying wood to the crusher from the tab), and a discharge conveyor for discharging chips after crushing to the outside. As a driving source of a crusher, there is a thing which is driven directly by a pulley etc. by an engine, and is driven by a hydraulic motor.

In the wood shredder, when the shredding material of the amount exceeding the shredding capacity of the shredder is supplied to the shredding material or the shape, size, and feeding direction of the shredding material exceeds the processing capacity of the shredding material, Engines and hydraulic motors may become overloaded and the shredder may be blocked by the shredder. In this case, the driving of the crusher stops or the rotary cutter (bit) of the crusher breaks, which is a factor that lowers the efficiency of the crushing work and the durability of the crusher.

Many have been proposed as a means to solve such a problem. For example, Patent Document 1 discloses, as its prior art, an engine speed detection means using an engine speed detection means, and when the detected speed reaches a predetermined value or less, it is judged to be an overload of a crusher and presses the wood to be crushed by the control means. A self-propelled wood shredder which stops the pressurized introduction means (corresponding to the above-mentioned conveying apparatus) to be gripped and pushed into the shredder is described. A self-propelled wood shredder having a load detecting means and a control means for switching and controlling the forward rotation drive and the reverse rotation drive of the hydraulic motor for pressurized introduction means according to the detected value of the crushed load detection means is described.

In addition, Patent Document 2 discloses a conventional technology, when the rotation speed of the crusher falls to a predetermined value (Nb), the raw material supply device (in the document 2, which is a rotary tap and corresponds to the conveying device) is automatically stopped and, on the contrary, A wood crusher is described which automatically starts the raw material feeder when the rotation speed rises to a predetermined value Na (where Na > Nb).

[Patent Document 1]

Japanese Patent Laid-Open No. 2002-346427 (No. 3-4 pages, Fig. 18)

[Patent Document 2]

Japanese Patent Laid-Open No. 2000-5624 (2nd page, paragraph [0006], 1st to 2nd degree)

However, the above conventional wood chipper has the following problems.

(1) The load of the shredder is detected by the engine speed, the load pressure or the speed of the hydraulic motor for the shredder, and the stopped object supply device (transfer device) is stopped according to the detected value, or the forward rotation drive and the reverse rotation Since the switching control of the drive is performed, the crushing operation is temporarily suspended when it is determined that the crusher is overloaded. For this reason, there exists a problem that crushing efficiency falls and the operation rate of a wood crusher falls. In addition, in order to reuse the chip after crushing into an organic fertilizer, compost raw material, or animal feed material, the chip production amount at the time of secondary processing cannot be stabilized, and chip production amount falls.

(2) A secondary processing machine that performs secondary processing for recycling chips after crushing into organic fertilizers, compost raw materials or livestock fertilizers is arranged on the discharge conveyor side of a wood crusher, so that both machines work in cooperation. If the wood shredder discharges the chip while the processing machine is stopped, the processing material (chip) is blocked on the secondary processing machine side, and the restart is difficult, and on the secondary processing machine side while the wood shredder is stopped. The material to be processed (chip) is insufficient and the operation rate decreases. Therefore, it is desired to be able to operate in conjunction with each other by controlling the operation and stop of the other in accordance with the operation state (during operation, abnormal stop, emergency stop, etc.) of either the wood crusher or the secondary processing machine. . However, since the conventional wood crusher is not configured to automatically perform such interlocking work, it is performed at the discretion of the worker, so it is necessary to always monitor the worker, and it is a great burden on the worker and also a production cost to secure the worker. There is a problem that increases.

The present invention has been made in view of the above problems, and can reduce the number of crushing stop states due to overloading of the crusher to improve the operation rate, and also control the wood crusher and the wood crusher, which can be interlocked with the secondary processing machine. It is an object to provide a method.

1 is a right side view of a wood crusher according to an embodiment of the present invention.

2 is a plan view of a wood crusher according to an embodiment of the present invention.

3 is a left side view of the wood crusher according to the embodiment of the present invention.

4 is a control block diagram of a wood crusher according to the present invention.

5 is a first half of the control flowchart according to the embodiment of the present invention.

6 is a second half of the control flowchart according to the embodiment of the present invention.

(Explanation of symbols for the main parts of the drawing)

One … Wood shredders 2. Frequent loan

3…. Driving base frame 4... Track frame

5…. Crawler track 6... engine

7. Radiator 9... Main control valve

10... Engine compartment 11. Body frame

12... Hopper 13... Feed conveyor

14. Feed roller 15. crusher

16. Discharge conveyor 17a. 1st stage conveyor

17b. 2nd conveyor 20. controller

21. Crusher load detector 22. Shredder Motor Load Pressure Sensor

23. Shredder Motor Speed Sensor

24a... Feed conveyor forward rotation operation valve

24b... Feed Conveyor Reverse Rotation Valve

25…. Feed Conveyor Control Valve

26a. Feed Roller Forward Operation Valve

26b... Feed Roller Reverse Rotary Valve

27. Feed roller control valve 28. Yellow turn light

29. Red flashing light 31. Exhaust conveyor load sensor

32. Feed conveyor load sensor 33. Feed roller load sensor

35. Second processor status signal input 36. Status signal output

51, 52, 53, 54... Pilot pipeline 59. screen

60... Rotary cutters 61, 62, 63... Hydraulic motor

64,65,66,67... pipeline

In order to achieve the above object, a first invention provides a wood crusher equipped with a hopper for introducing wood, a crusher for crushing wood, and a wood feeder for supplying wood in the hopper to the crusher: detecting a load of the crusher. Crusher load detector; And a controller that controls the feed rate of the wood feeder in accordance with the crusher load detected by the crusher load detector.

According to the first invention, the overload condition is gradually eliminated while the crusher is operated because the feed rate of the wood feeder such as the feed conveyor and the feed roller (feed rate in the case of the feed conveyor and the feed roller) is controlled according to the crusher load. Can be maintained. Therefore, the number of times the crushing stop state occurs due to the stop of the wood supply device or the switching of the forward and reverse rotation during the crushing operation can be reduced, and the operation rate of the crusher can be improved.

According to a second aspect of the present invention, the controller determines the detected crusher load level in stages and controls the feed rate of the wood feeder in accordance with the level of each stage.

According to the second invention, the control process of the controller is simplified, and the simple control process makes it possible to reliably control the feed rate of the wood feeder (the conveying speed in the case of the feed controller and the feed roller) according to the crusher load level. .

A third invention provides a wood shredder comprising a hopper for introducing wood, a shredder for shredding wood, a wood feeder for supplying wood in the hopper to the shredder, and a discharge conveyor provided below the shredder. A controller for inputting an operation state signal of a secondary processing machine disposed downstream of the conveyor and controlling start and stop of the crusher, the discharge conveyor and the wood feeder according to the input operation state signal. Doing.

According to the third invention, the automatic interlocking operation is controlled by controlling the start and stop of each device of the wood shredder such as the wood feeder (for example, feed conveyor and feed roller), the shredder and the discharge conveyor according to the operation status signal of the secondary processing machine. It becomes possible. As a result, the problem that the chips discharged from the wood crusher are blocked during the stop of the secondary processing machine, makes it difficult to restart the secondary processing machine, and there is no burden on the operator according to the interlocking device. The efficiency can be improved.

The fourth invention corresponds to the method invention of the first invention, which is an apparatus invention, and supplies wood to a hopper from a wood supply device to a crusher, and detects a load of the crusher for crushing the supplied wood to control the wood supply device. In the control method of the wood crusher: The method of controlling the feed rate of the wood feeder according to the load of the crusher.

According to 4th invention, the effect similar to 1st invention is acquired.

The fifth invention corresponds to the method invention of the third invention, which is an apparatus invention, which controls the wood shredder which shreds the wood supplied by the wood feeder from the hopper with the shredder and discharges the shredded shreds to the secondary processing machine by the discharge conveyor. In the method: automatically controlling the starting and stopping of the shredder, the discharge conveyor and the wood feeder in accordance with the operating state of the secondary processing machine.

According to 5th invention, the effect similar to 3rd invention is acquired.

EMBODIMENT OF THE INVENTION Below, embodiment of this invention is described in detail with reference to drawings.

1 is a right side view of a wood crusher according to an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a left side view of FIG. The wood chipper 1 frequently installs the body frame 11 on the trolley 2, and the engine compartment 10 is provided on one side (left in this example) in the left and right traveling directions on the body frame 11, On the other side, a hopper 12 is installed at one end in the front-rear direction, and a feed conveyor 13 is provided below the hopper 12, and a feed roller 14 is provided above the feed direction downstream of the feed conveyor 13, respectively. It is. Moreover, the crusher 15 is provided downstream of the feed conveyor 13 at the other end part of the front-back direction. Further, below the crusher 15, a front and rear two-stage discharge conveyor 16 is provided to be discharged toward the rear of the vehicle. That is, the conveyor 16 is provided so that discharge | release is possible toward the right direction in FIG.

Frequently, the trolley 2 has a pair of left and right track frames 4 and 4 fixed to the lower part of the driving base frame 3, and the sprocket and idler which are rotatably fixed to both front and rear ends of the track frame 4 by rotation. The crawler track 5 is wound and attached to the circumference.

In the engine chamber 10, the engine 6 is installed facing the output shaft in the front-rear direction, and a suction type cooling fan is provided in front of the engine 6, and a radiator 7 in front of the engine 6 is provided. At the rear end of the output shaft of the engine 6, a hydraulic pump (not shown) is mounted, and behind the engine 6, a feed conveyor 13, a rotary cutter for a crusher 15 to be described later, a discharge conveyor 16, and the like are driven. The main control valve 9 is provided.

In addition, the control unit storage box which accommodated the controller 20 is provided in the rear part of the engine compartment 10 on the body frame 11.

The hopper 12 has a substantially rectangular shape in plan view, and has a funnel shape in which the upper part is opened outward when viewed in front, and has an opening at the lower end. The wood introduced from the upper opening of the hopper 12 is sandwiched by the iron feed conveyor 13 and the feed roller 14, and is driven synchronously and conveyed to the crusher 15.

The crusher 15 is provided with the rotary cutter 60 rotatably installed in the vicinity of the downstream end of the feed conveyor 13, and the hydraulic motor 61 which drives this rotary cutter 60. As shown in FIG. Moreover, below the rotary cutter 60, the screen 59 which sorts out the particle size (size) of the crushed chip | tip is provided.

Further, the first stage conveyor 17a of the front and rear two-stage discharge conveyor 16 is provided below the rotary cutter 60, and the rear side of the rotary cutter 60 is inclinedly movable with the drive shaft on the first stage conveyor 17a side as the center of rotation. The second stage conveyor 17b is provided. The first-stage conveyor 17a has a steel conveying part so that the chip | tip which fell | disrupted falls and is not damaged even if it collides, and the 2nd-stage conveyor 17b has a rubber | gum or steel conveying part.

Fig. 4 is a block diagram showing the control configuration of the wood crusher according to the present invention, and Fig. 4 illustrates the structure of the control device.

In the hydraulic circuit of the hydraulic motor 61 for driving the rotary cutter 60 of the crusher 15, as one of the crusher load detectors 21, a crusher motor load pressure sensor 22 for detecting the load pressure of the hydraulic motor is provided. It is installed. The crusher motor load pressure sensor 22 is comprised with a pressure switch, a pressure sensor, etc., for example. As another crusher load detector 21, a crusher motor rotation speed sensor 23 for detecting the rotational speed (rotational speed) of the hydraulic motor is provided in the shaft portion connected to the hydraulic motor rotation shaft. The crusher motor rotational speed sensor 23 is comprised, for example with a pulse generator. The detection load pressure signal of the crusher motor load pressure sensor 22 and the detection rotation speed signal of the crusher motor rotation speed sensor 23 are input to the controller 20.

The hydraulic motor 62 which drives the feed conveyor 13 is connected to the output port of the feed conveyor control valve 25 via the conduits 64 and 65, and to the operation valve of the feed conveyor control valve 25 in both directions. The feed conveyor forward rotation operation valve 24a and the feed conveyor reverse rotation operation valve 24b are connected through the pilot pipe lines 51 and 52, respectively. In addition, the hydraulic motor 63 driving the feed roller 14 is connected to the output port of the feed roller control valve 27 via conduits 66 and 67, and the bidirectional operation of the feed roller control valve 27 is performed. The feed roller forward rotation operation valve 26a and the feed roller reverse rotation operation valve 26b are connected to the valve via the pilot conduits 53 and 54, respectively. The feed conveyor forward rotation operation valve 24a and the feed conveyor reverse rotation operation valve 24b are operation valves for outputting a pilot pressure signal corresponding to the magnitude of the electric command signal, and the feed conveyor control valve 25 supplies the pilot pressure signal. In response, the flow rate and direction of the hydraulic oil from the hydraulic pump (not shown) are switched to control the rotation speed and the rotation direction of the hydraulic motor 62. Similarly, the feed roller forward rotation operation valve 26a and the feed roller reverse rotation operation valve 26b are operation valves for outputting a pilot pressure signal different from the magnitude of the electric command signal, and the feed roller control valve 27 is the pilot pressure signal. In order to control the rotational speed and the rotational direction of the hydraulic motor 63 by switching the flow rate and direction of the hydraulic oil from the hydraulic pump (not shown). The controller 20 outputs the forward rotation command and the reverse rotation command of the feed conveyor 13 to the feed conveyor forward rotation operation valve 24a and the feed conveyor reverse rotation operation valve 24b, respectively. 26a) and the forward rotation command and the reverse rotation command of the feed roller 14 are output to the feed roller reverse rotation operation valve 26b, respectively.

Further, the discharge conveyor load sensor 31 and the feed conveyor load which detect the load of the discharge motor for driving the discharge conveyor, the load of the hydraulic motor 62 for the feed conveyor drive, and the load of the hydraulic motor 63 for the feed roller drive, respectively. The sensor 32 and the feed roller load sensor 33 are provided. These load sensors 31, 32, 33 are comprised with a pressure switch, a pressure sensor, a rotation speed sensor, etc. The load signal detected by these is input to the controller 20.

In addition, a yellow rotating lamp 28 and a red rotating lamp 29 are provided for notifying an operator or the like that the overload is detected and being under control of the overload processing and the emergency stop, respectively. The yellow turn light 28 and the red turn light 29 turn on by the respective turn-on command signals from the controller 20.

In addition, the controller 20 transmits the secondary processor status signal input unit 35 for obtaining the status signal (during operation, abnormal stop, emergency stop, etc.) of the secondary processor, and the status signal of the main body apparatus such as a secondary processor. It has the state signal output part 36 to output to an external machine.

Next, the control processing procedure will be described based on FIG. 5 and FIG. 6. 5 and 6 show the front part and the rear part of the control flowchart.

First, the crusher load pressure p detected by the crusher motor load pressure sensor 22 in step S1 is equal to or greater than the predetermined overload set value P1 (for example, 33 MPa), and the duration time is the predetermined time T1. (For example, 3 seconds) or more, and in that case, the feed conveyor 13 is stopped by outputting a stop command to the feed conveyor forward rotation operation valve 24a and the feed conveyor reverse rotation operation valve 24b in step S2. In addition, the feed roller 14 is stopped by outputting a stop command to the feed roller forward rotation operation valve 26a and the feed roller reverse rotation operation valve 26b. After that, the yellow rotating lamp 28 is turned on in step S3 to indicate that the overload processing is under control. If the judgment at step S1 is not the case, the process proceeds to step S4.

Subsequently, in step S4, the crusher load pressure p is equal to or less than the predetermined overload control release set pressure P2 (for example, P2 = P1-3 MPa), and the state is a predetermined time T2 (for example, 1 second). Check whether the abnormality has been continued, and at that time, the feed controller forward rotation operation valve 24a or the feed conveyor reverse rotation operation valve 24b, and the feed roller forward rotation operation valve 26a or the feed roller reverse rotation operation valve in step S5. In step S2, the speed command immediately before outputting the overload stop command is output to 26b, and the respective speeds are returned. If the determination in step S4 is not made, the process proceeds to step S10.

Next, in step S10, it is checked whether the crusher rotational speed n detected by the crusher motor rotational speed sensor 23 fell below the predetermined overload set rotational speed NOxα1. However, NO is assumed to be a predetermined target rotational speed. α1 is 0.9, for example. In addition, when it lowers below the overload set rotation speed NOx (alpha) 1, the conveyance speed of the feed conveyor 13 and the feed roller 14 is decelerated to (regular speed F0x (beta) 1) in step S11. Here, the prescribed speed F0 is set in advance by, for example, a feed speed dial provided in an operation panel (not shown). β1 is 0.8, for example. After that, the yellow rotating lamp 28 is turned on in step S12. Subsequently, in step S13, the crusher rotation speed n rises above the predetermined overload release determination rotation speed NO × α1 + N1 and checks whether the duration time is longer than or equal to the predetermined time T3. In step S14, the conveyance speeds of the feed conveyor 13 and the feed roller 14 are returned to the original defined speed F0. Here, N1 is a predetermined rotation speed for stabilizing the control by having a hysteresis characteristic in the determination at the rotation speed, for example, 50 rpm, and T3, for example, 1 second. The process then returns to Step S10 to repeat the process. In addition, when the determination of said step S10 and step S13 is not, the following process is moved to step S20.

In step S20, it is checked whether the shredder rotation speed n fell below the predetermined overload setting rotation speed NOx alpha 2 or less. However, α2 is smaller than α1, for example, 0.8. When it falls below overload set rotation speed NOx (alpha) 2, the conveyance speed of the feed conveyor 13 and the feed roller 14 is decelerated to (regular speed FOx (beta) 2) in step S21. Here, β2 is smaller than β1, for example, 0.6. Subsequently, in step S22, the crusher rotation speed n rises above the predetermined overload release determination rotation speed NO × α2 + N1, and checks whether the duration time is longer than the predetermined time T3, and if so, In step S23, the conveyance speeds of the feed conveyor 13 and the feed roller 14 are returned to the original speed (F0x1). Thereafter, the process returns to step S20 to repeat the process. If the determination of step S20 and step S22 is not the case, the following process proceeds to step S30.

In step S30, it is checked whether the crusher rotation speed n has fallen below the predetermined overload setting rotation speed NO x alpha 3. However, α3 is smaller than α2, for example, 0.7. When it falls below overload set rotation speed NOx (alpha) 3, the conveyance speed of the feed conveyor 13 and the feed roller 14 is decelerated to (regular speed FOx (beta) 3) in step S31. Here, β3 is smaller than β2, for example 0.4. Subsequently, in step S32, the crusher rotation speed n rises above the predetermined overload release determination rotation speed NO × α 3 + N 1, and checks whether the duration time is longer than the predetermined time T 3, and if so, In step S33, the conveyance speeds of the feed conveyor 13 and the feed roller 14 are returned to the original speed (F0x (beta) 2). The process then returns to Step S30 to repeat the process. If the determination of step S30 and step S32 is not otherwise, the following process proceeds to step S40.

Next, in step S40, it is checked whether the crusher rotation speed n fell below the predetermined overload setting rotation speed NOx alpha4. However, α4 is smaller than α3, for example, 0.5. When it does not fall below overload setting rotation speed NO * (alpha) 4, a process is shifted by step S50. In addition, when it falls below the overload set rotation speed NOx (alpha) 4, the feed conveyor 13 and the feed roller 14 are stopped in step S41. Subsequently, it is checked in step S42 whether the state in which the crusher rotation speed n has fallen below the predetermined overload release determination rotation speed NOxα4 or more has continued for a predetermined time T4 (for example, 2 seconds), and it is not so. At that time, the process returns to step S40 to repeat the process. In that case, the feed conveyor 13 and the feed roller 14 are rotated back at predetermined speed F2 in step S43. Subsequently, it is checked in step S44 whether the state in which the crusher rotation speed n has fallen below the predetermined overload release determination rotation speed NO × α4 or more continues for a predetermined time T5 (for example, 10 seconds), and then continues. In step S47, the emergency stop process is performed. In this emergency stop process, each device, such as the crusher 15, the discharge conveyor 16, the feed conveyor 13, and the feed roller 14, is stopped and the red rotating light 29 is lighted. Thereafter, the emergency stop signal is output to the secondary processor in step S48.

On the other hand, when the determination in step S44 is not made, the process proceeds to step S45, where the crusher rotation speed n rises above the predetermined overload release determination rotation speed NO x alpha 4 + N1, and this duration is predetermined. It is checked whether it is more than the time T3, and in that case, the conveyance speed of the feed conveyor 13 and the feed roller 14 is returned to the original speed (F0x (beta) 3) in step S46, and a process transfers to step S50. . If the determination in step S45 is not otherwise, the next process proceeds to step S50.

In step S50, the load pressure of the hydraulic motor for driving the discharge conveyor 16 detected by the discharge conveyor load sensor 31 is equal to or greater than the predetermined value P2, and the duration time is equal to or longer than T6 (for example, 2 seconds). Is checked, and if so, the emergency stop processing is performed in step S47, and the processing is repeated. When the determination of step S50 is not otherwise, the load pressure of the feed conveyor 13 detected by the feed conveyor load sensor 32 in step S51 is more than the predetermined value P3, and the duration time is T6 (e.g., 2 seconds) or more, and in that case, the emergency stop process is performed in step S47, and the process is repeated. When the determination in step S51 is not made, the load pressure of the feed roller 14 detected by the feed roller load sensor 33 in step S52 is equal to or greater than the predetermined value P4, and the duration time is T6 (e.g., 2 seconds) or more, and in that case, the emergency stop process is performed in step S47, and the process is repeated. If the determination in step S52 is not performed, then, in step S53, it is checked whether or not the status signal of the secondary processor (abnormal stop, emergency stop, running, etc.) is input, and when it is input, in accordance with the state signal input in step S54, 15) Start / stop of the discharge conveyor 16, the feed conveyor 13, and the feed roller 14 are controlled. Subsequently, the process returns to step S1 and the above processing is repeated.

In addition, although the crusher load is detected by the rotation speed and load pressure of a crusher drive motor in the said embodiment, only one of them may be detected. In addition, although the conveyance speed of a feed conveyor and a feed roller is controlled according to the rotation speed of a crusher drive motor, it can also control according to a load pressure.

In addition, in embodiment, as an example of a wood crusher, the hopper 12 is provided by the feed conveyor 13 provided below the hopper 12, and the feed roller 14 arrange | positioned above the feed conveyor 13 downstream. Although the present invention was described as supplying the wood to the crusher 15, the present invention is not limited to this structure. For example, the wood inserted into the tab (corresponding to the hopper) is rotated in the horizontal direction, and the bottom of the tab is rotated. It may be of a configuration for supplying to a crusher having a (corresponding to a wood feeder).

The following effects are acquired by the structure demonstrated above.

(1) Since the conveying speeds of the feed conveyor 13 and the feed roller 14 are controlled according to the load of the driving hydraulic motor 61 of the crusher 15, even if an overload of the crusher 15 occurs, the crusher 15 Since the overload condition is gradually eliminated while the crusher 15 is operated without stopping 15), the operation can be maintained for a long time. Thereby, the frequency | count of a crushing stop state which arises by the stop of the feed conveyor 13 at the time of overload or switching of forward rotation and reverse rotation can be reduced, and the operation rate of the wood crusher 1 can be improved.

(2) Since the crusher load level is divided into a plurality of ranges step by step, and the conveying speeds of the feed conveyor 13 and the feed roller 14 are controlled step by step according to the range, the control process of the controller 20 becomes simple. In addition, this simplified processing makes it possible to reliably control the conveyance speeds of the feed conveyor and feed roller.

(3) Start and stop of each device of the wood shredder 1 such as the feed conveyor 13, the feed roller 14, the shredder 15 and the discharge conveyor 16 in accordance with the operation state signal of the secondary processing machine. By doing so, the automatic linkage state becomes possible. As a result, the problem that the chips discharged from the wood shredder 1 are blocked during the stop of the secondary processing machine, makes it difficult to restart, and there is no burden on the operator due to the interlocking operation. Can improve.

(4) In addition, since the operation state signal of the wood shredder 1 is output to the secondary processing machine (abnormal stop in which only one device is stopped in a restartable state, emergency stop in which the entire device is stopped, and during operation), the secondary The processing machine can stop or start the secondary processing operation based on the operation state signal of the crusher 15 or the discharge conveyor 16 of the wood crusher 1, thereby preventing the inefficient operation and improving the operating efficiency. Can be.

Claims (5)

In a wood crusher having a hopper 12 for introducing wood, a crusher 15 for crushing wood, and a wood feeder 13, 14 for supplying wood in the hopper 12 to the crusher 15: A crusher load detector (21) for detecting a load of the crusher (15); And And a controller (20) for controlling the feed rate of the wood feeder (13, 14) according to the crusher load detected by the crusher load detector (21). The wood shredder as claimed in claim 1, wherein the controller (20) determines the detected shredder load level step by step and controls the feed rate of the wood feeders (13, 14) according to the level of each step. . Of a hopper 12 for inputting wood, a crusher 15 for crushing wood, a wood feeder 13, 14 for supplying wood in the hopper 12 to the crusher 15, and the crusher 15 In a wood chipper with a discharge conveyor 16 installed below: The operation state signal of the secondary processing machine arrange | positioned downstream of the said discharge conveyor 16 is input, and according to the input operation state signal, the said crusher 15, the said discharge conveyor 16, and the said wood supply apparatus 13 And a controller (20) for controlling the start and stop of the wood breaker. The wood introduced into the hopper 12 is supplied to the crusher 15 by the wood supply devices 13 and 14, and the load of the crusher 15 to crush the supplied wood is detected to provide the wood supply devices 13 and 14. In the control method of wood shredder to control Control method of the wood crusher, characterized in that for controlling the feed rate of the wood supply device (13,14) according to the load of the crusher (15). In the control method of the wood crusher for crushing the wood supplied from the hopper 12 by the wood supply device (13,14) to the crusher 15, and discharges the crushed crushed material to the secondary processing machine by the discharge conveyor (16) In: Control method of the wood crusher, characterized in that for controlling the start and stop of the crusher 15, the discharge conveyor 16 and the wood supply device (13, 14) automatically in accordance with the operation state of the secondary processing machine. .