JP3915953B2 - Safety device for wood crusher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a safety device for a wood crusher, and more particularly to a safety device for a wood crusher that crushes wood into small pieces of wood.
[0002]
[Prior art]
Conventionally known wood crushers are equipped with crushers, rotary tabs, conveyors and other driving parts, and a shatterproof cover that can be moved to a shatterproof posture of the shredded pieces located above the rotary tabs. The And the wood thrown into the rotary tab from the outside is guided to the crusher by the rotation of the rotary tab, crushing while preventing the shattered pieces from scattering to the outside of the rotary tab by the anti-scattering cover, and installed below the crusher Discharge onto the conveyor. In addition, a boarding section on which an operator boardes is installed at the upper part of the wood crusher during inspection, vehicle driving operation, and the like, and a drive command can be input to the driving section from a location different from the boarding section. Further, the rotary tab can be tilted in the left-right direction so that an operator can enter the rotary tab during cleaning or the like.
[0003]
[Problems to be solved by the invention]
However, the prior art has the following problems.
(1) When a drive command is input to the drive unit from a location different from the boarding unit, and an operator enters the boarding unit and inadvertently contacts the traveling operation unit of the vehicle while the crusher or the rotary tab is operating, There is a risk that the vehicle will start suddenly and the operator may fall. If you look into the hopper, you may be injured by the scattered pieces and fall into the hopper and touch the crusher.
(2) If the crusher is operated when the rotary tab is open, the crusher is exposed, which is dangerous for nearby operators.
(3) If the wood crusher is operated when the anti-scattering cover is not moved to the anti-scattering posture, crushed pieces are scattered outside the rotary tab from the upper side of the rotary tab, and an operator nearby is injured.
(4) When the crusher or the rotary tab is operated when the conveyor is not in an extended state that can be conveyed, the crushing pieces discharged from the crusher cannot be conveyed.
[0004]
The present invention has been made paying attention to the above-mentioned problems, and an object of the present invention is to provide a safety device for a wood crusher that prevents the danger of wood crushing work.
[0005]
[Means, actions and effects for solving the problems]
To achieve the above object, the safety device of the crusher according to the first invention of the present application, crusher, and the driving unit of the rotary tub and conveyor, and a riding portion that the operator is riding, the riding section Has an input unit that allows input of drive commands to the respective drive units from different locations, and the wood introduced into the rotary tab from the outside is guided to the crusher by the rotation of the rotary tab and crushed on the conveyor in crusher to discharge, crusher, the rotary tub, and operating state detecting means for detecting that at least one of the drive units of the conveyor is in operation, boarding closed to freely close the entrance to the riding section And a controller that receives a detection signal from the operating state detection means and inputs a command to close the entrance to the boarding portion to the boarding gate closing means.
[0006]
According to the first invention, crusher, the rotary tub, at least one of the drive units of the conveyor when in operation, the boarding port closing means by a command of the controller to close the entrance to the riding section. Therefore crusher, the rotary tub, the driving portion of the conveyor when in operation can not be operator entering a riding section. For this reason, the fall accident from a wood crusher and the injury by a crushing piece can be prevented, and the safety | security of wood crushing work improves. The rotational speed of the rotary tab is set to be large for hard wood and small for soft wood, but this action and effect is great when the hard wood is crushed by increasing the rotational speed of the rotary tab.
[0007]
Safety equipment crusher according to a second aspect of the present invention is crusher, a rotary tub and the drive of the conveyor, and a riding portion that the operator is riding, to the respective drivers from different points from the riding section In the wood crusher that has an input section that allows the drive command of the input to be freely input, guides and crushes the wood that has been input to the rotary tab from the outside to the crusher by rotation of the rotary tab, and discharges it onto the conveyor. controller operator to output a boarding detection means for detecting that aboard, crusher receives the detection signal from the boarding detection unit, the rotary tub, at least one stop command for the drive units of the conveyor It is characterized by having.
[0008]
According to the second invention, a detection signal from the boarding detection unit operator aboard the riding section, crusher, the rotary tub, at least one of the drive units of the conveyor is stopped. Therefore, crusher, the rotary tub, but if the driver stops all conveyor safety is most improved, that much work efficiency is improved by the small driver dangerous to necessarily not to stop.
[0011]
Safety equipment crusher according to a third aspect of the present invention is crusher, a rotary tub and the drive of the conveyor, and a riding portion that the operator is riding, to the respective drivers from different points from the riding section A wood crusher that has an input unit that can freely input a drive command for the wood, and that is introduced into the rotary tab from the outside, guided to the crusher by the rotation of the rotary tab, is crushed and discharged onto the conveyor. , the rotary tub, and operating state detecting means for detecting that at least one of the drive units of the conveyor is in operation, a boarding gate closing means for freely closed entrance to the riding section, the operator on the riding section A boarding detection means for detecting that the vehicle is on board, and a command for closing the entrance upon receipt of the detection signal from the operating state detection means are input to the boarding gate closing means, and the detection signal from the boarding detection means is received for crushing. Machine, rotary tab, co And having a controller for outputting at least one stop commands for the drive of the bare.
[0012]
According to the third invention, both the effects of the first invention and the second invention can be obtained, and a synergistic effect thereof can be expected.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments according to the present invention will be described below in detail with reference to the drawings of FIGS. 1 and 2 show the overall configuration of an embodiment of the present invention.
An engine 3 is mounted on the base 2 of the wood crusher 10 to which the traveling crawler belt 1 is mounted. The hydraulic pump 4 is connected to a crusher operation valve 6 via a pipe line 5, and the crusher operation valve 6 is connected to a crusher hydraulic motor 8 a (crusher hydraulic actuator 8) via a pipe line 7. The crusher hydraulic motor 8 a drives a crusher 9 installed on the base 2. In addition, although this embodiment demonstrates a tracked vehicle, a wheeled vehicle may be sufficient.
[0016]
A funnel-shaped rotary tab 11 for guiding wood input from the outside to the crusher 9 is rotatably installed on the crusher 9 by a predetermined drive source (for example, a hydraulic motor 43 shown in FIG. 8). On the base 2, a scattering prevention cover 12 as shown in detail in FIG. 3 is rotated so as to face the scattering direction R of the wood pieces when the crusher 9 is rotating forward (clockwise on the crusher hydraulic motor 8a side). It is installed so as to be close to the upper end of the formula tab 11. As shown in detail in FIG. 4, the base 2 below the crusher 9 includes a first conveyor 13 a, a second conveyor 13 b, a hydraulic cylinder 13 c, and the like, and conveys a piece of wood discharged from the crusher 9. Is installed. Further, a boarding part 14 on which an operator gets on the rear side of the rotary tab 11 and above the crusher hydraulic motor 8a, and an entrance 15 as shown in detail in FIG. .
[0017]
In FIG. 3, two nodes Q1 and Q2 provided on the scattering prevention cover 12, two nodes Q3 and Q4 provided on a column 16 standing on the base 2, and a node Q1 and a column on the scattering prevention cover 12 A four-link is formed by the first link 17 that connects the node Q3 on the 16 and the second link 18 that connects the node Q2 on the scattering prevention cover 12 and the node Q4 on the support column 16. With this four-bar link, a retracted posture (indicated by a two-dot chain line) where the outer surface of the anti-scattering cover 12 is located below and substantially inside the upper end of the rotary tab 11, and the lower end edge of the anti-scattering cover 12 is rotary. It restricts so as to be movable between an installation position (indicated by a solid line) close to the upper end of the tab 11. A hydraulic cylinder 19 is mounted on the node Q5 on the second link 18 and the node Q6 on the support column 16. A scattering prevention state detection switch (scattering prevention state detection means) 39 that operates by contacting the first link 17 when the scattering prevention cover 12 is in the installation position is fixed to the upper end of the column 16.
[0018]
According to the configuration of FIG. 3, when the hydraulic cylinder 19 having an extension stopper is extended to the stroke end, the lower end edge of the anti-scattering cover 12 reaches the installation position (shown by a solid line) close to the upper end portion of the rotary tab 11. Moving. When the hydraulic cylinder 19 having a contraction stopper is contracted to the stroke end, the anti-scattering cover 12 is in a retracted posture (indicated by a two-dot chain line) where the outer surface is located below the upper end of the rotary tab 11 and substantially inside. Moving. When the scattering prevention cover 12 moves to the installation position, the scattering prevention state detection switch 39 contacts the first link 17 and detects the scattering prevention state of the crushed wood pieces.
[0019]
In FIG. 4, the base 2 supports the base end portion of the first conveyor 13 a, and the longitudinal tip portion of the first conveyor 13 a is supported by the overhang beam 21 and the suspension bracket 22 fixed to the base 2. The The base end of the second conveyor 13b is pivotally supported around the pin P1 so as to be rotatable in the vertical direction at the longitudinal tip of the first conveyor 13a. One end of an arm 13d is fixed to the proximal end portion of the second conveyor 13b, and one end of the first conveyor 13a is attached with a link 13e so as to be rotatable around the pin P2, and each of the arms 13d and 13e The other end is connected by a pin P3. A hydraulic cylinder 13 c is mounted on the pin P 3 and the pin P 4 on the overhang beam 21. An extension state detection switch (extension state detection means) 40 for detecting the extension state of the second conveyor 13b is fixed to the first conveyor 13a.
[0020]
According to the configuration of FIG. 4, when the hydraulic cylinder 13c is extended and the second conveyor 13b is rotated forward around the pin P1, the proximal end portion of the second conveyor 13b comes into contact with the extended state detection switch 40 and the conveyor 13 The extension state is detected.
[0021]
In FIG. 5, two upright columns 23 and 24 are erected on the floor 14 a of the riding section 14, and a horizontal column 26 pivotally supported at a fulcrum P is attached to a bracket 25 fixed to one of the upright columns 23. The stopper 27 fixed to the other upright 24 can rotate freely. A protruding piece 28 is fixed to the horizontal column 26 in a right angle direction. A lock cylinder (boarding gate closing means) 30 having a pin 30 a that can freely enter and exit from a pin hole 28 a formed in the protruding piece 28 is fixed to the other upright column 24. Further, a boarding detection switch (boarding detection means) 33 that is operated by a movable floor 32 supported by springs 31, 31 is installed on the floor 14 a of the boarding unit 14. The lock cylinder 30 is a hydraulic type, but may be an electric cylinder or the like.
[0022]
According to the configuration of FIG. 5, when an operator enters the riding section 14, the movable floor 32 that descends against the spring 31 comes into contact with the boarding detection switch 33, and the operator is on the riding section 14. Detect that. Further, when the pin 30a of the lock cylinder 30 is extended, the pin 30a is inserted into the pin hole 28a of the protruding piece 28, and the rotation of the horizontal column 26 around the pin P is fixed.
[0023]
In FIG. 6, a door 34 through which an operator enters and exits the rotary tab 11 during maintenance is installed on the side wall 11 a of the rotary tab 11. The door 34 is mounted on the side wall 11a of the rotary tab 11 by a hinge 35 so as to be freely opened and closed between a closed position indicated by a solid line and an open position indicated by a two-dot chain line. When the door 34 is moved to the closed position, a door closing switch (door closed state detecting means) 36 fixed to the side wall 11a of the rotary tab 11 is activated to detect the closed state of the door 34. In this state, when the fixing pin 38 is inserted into the pin hole of the bracket 37 fixed to the side wall 11 a of the rotary tab 11 and the pin hole of the door 34, the closed state of the door 34 is maintained.
[0024]
According to the configuration of FIG. 6, when the door 34 is moved to the closed position (shown by a solid line), the door 34 contacts the door closing switch 36 and detects the closed state of the door 34. In this state, the fixing pin 38 is inserted into the pin hole of the bracket 37 and the pin hole of the door 34 to keep the door 34 closed.
[0025]
In FIG. 7, the rotary tab 11 is pivotally supported on the gantry 2 by a pin Q7, and the hydraulic cylinder 47 is pivotally supported at one end by a crusher 9 fixed to the gantry 2 by a pin Q8 and the other end by a pin Q9. The rotary tab 11 is pivotally supported. Further, a tab closed state detection switch 41 for detecting the closed state of the rotary tab 11 is attached to the gantry 2.
[0026]
According to the configuration of FIG. 7, when cleaning the rotary tab 11, the hydraulic cylinder 47 is extended to rotate the rotary tab 11 around the pin Q7 to the position of the two-dot chain line. When crushing wood, the hydraulic cylinder 47 is contracted and the rotary tab 11 is rotated around the pin Q7 to the position of the solid line. When the rotary tab 11 is in the closed position, the tab closed state detection switch 41 attached to the gantry 2 is actuated to detect the closed state of the rotary tab 11.
[0027]
In FIG. 8, the hydraulic pump 4 driven by the engine 3 is connected to the crusher hydraulic motor 8a via the crusher operation valve 6, connected to the tab hydraulic motor 43 via the tab operation valve 42, and the conveyor operation valve. It is connected to the conveyor hydraulic motor 45 through 44, and is connected to the lock cylinder 30 through the lock operation valve 46. A crusher hydraulic switch 49 for detecting the high pressure selected by the two check valves 48 is connected to the connection line 7 between the crusher operation valve 6 and the crusher hydraulic motor 8 a, and the tab operation valve 42 and the tab hydraulic motor 43 are connected. A tab hydraulic switch 51 for detecting the high pressure selected by the two check valves 50 is connected to the pipe line, and the high pressure selected by the two check valves 52 is detected for the pipe line connecting the conveyor operation valve 44 and the conveyor hydraulic motor 45. A conveyor hydraulic switch 53 is connected, and a lock hydraulic switch 55 for detecting a high pressure selected by the two check valves 54 is connected to a connecting line between the lock operation valve 46 and the lock cylinder 30.
[0028]
According to the configuration of FIG. 8, the crusher hydraulic switch 49 detects the operation of the crusher hydraulic motor 8a, the tab hydraulic switch 51 detects the operation of the tab hydraulic motor 43, and the conveyor hydraulic switch 53 detects the operation of the conveyor hydraulic motor 45. Detect operation. The lock hydraulic switch 55 detects that the hydraulic pressure of the lock cylinder 30 has reached a predetermined value. The operation of the crusher hydraulic motor 8a, the operation of the tab hydraulic motor 43, and the operation of the conveyor hydraulic motor 45 may be detected by the rotation of each hydraulic motor 8a, 43, 45.
[0029]
FIG. 9 is a diagram showing the first embodiment of the present invention. The controller 56 inputs the detection signals of the crusher hydraulic switch 49, the tab hydraulic switch 51, and the conveyor hydraulic switch 53 shown in FIG. When it is determined that at least one of the rotary tab 11 and the conveyor 13 is in operation, the controller 56 outputs an excitation command to the closing solenoid 46a of the lock operation valve 46 shown in FIG. When it is determined that none of the crusher 9, the rotary tab 11, and the conveyor 13 is operating, the controller 56 outputs an excitation command to the opening solenoid 46b of the lock operation valve 46 shown in FIG.
[0030]
The operation of the first embodiment will be described.
In FIG. 9, the controller 56 inputs detection signals from the crusher hydraulic switch 49, the tab hydraulic switch 51, and the conveyor hydraulic switch 53, and at least one of the crusher 9, the rotary tab 11, and the conveyor 13 is operating. Determine that there is. At this time, the closing solenoid 46a of the lock operation valve 46 is excited by a command from the controller 56. For this reason, since the pin 30a of the lock cylinder 30 shown in FIG. 5 is extended and inserted into the pin hole 28a of the protruding piece 28, the doorway 15 to the riding section 14 is closed. When none of the detection signals of the crusher hydraulic switch 49, the tab hydraulic switch 51, and the conveyor hydraulic switch 53 are input to the controller 56, the opening solenoid 46b of the lock operation valve 46 is excited by a command from the controller 56. Therefore, the pin 30a of the lock cylinder 30 contracts and comes out of the pin hole 28a of the protruding piece 28, so that the entrance / exit 15 to the riding section 14 is opened.
[0031]
FIG. 10 is a diagram showing a second embodiment of the present invention. The controller 56 controls the forward solenoid 6a (58a in FIG. 12) of the crusher operation valve 6 shown in FIG. 8 according to a command from the crusher normal rotation command switch 61a. The reversing solenoid 6b (58b in FIG. 12) of the crusher operation valve 6 shown in FIG. 8 is excited by the command of the crusher reversing command switch 61b. Further, the forward solenoid 42a of the tab operation valve 42 shown in FIG. 8 is excited by the command of the rotary tab forward command switch 62a, and the reverse of the tab operation valve 42 shown in FIG. 8 is received by the command of the rotary tab reverse command switch 62b. The solenoid 42b is excited. When the controller 56 inputs the detection signal of the boarding detection switch 33, the forward solenoid 6a (58a in FIG. 12) or the reverse solenoid 6b (58b in FIG. 12) of the crusher operation valve 6 and the forward solenoid of the tab operation valve 42 are detected. A demagnetization command is output to 42a or reverse solenoid 42b.
[0032]
The operation of the second embodiment will be described.
In FIG. 10, when the crusher normal rotation command switch 61a is pressed, the normal rotation solenoid 6a (58a in FIG. 12) of the crusher operation valve 6 is excited, and when the crusher reverse rotation command switch 61b is pressed, the crusher operation valve 6 reverses. The solenoid 6b (58b in FIG. 12) is excited. When the rotary tab forward rotation command switch 62a is pressed, the forward rotation solenoid 42a of the tab operation valve 42 is excited, and when the rotary tab reverse rotation command switch 62b is pressed, the reverse rotation solenoid 42b of the tab operation valve 42 is excited. When the boarding detection switch 33 detects that an operator is present in the boarding section 14 shown in FIG. 5 and the controller 56 inputs this detection signal, the forward rotation solenoid 6a (see FIG. 12, the reverse solenoid 6b (58b in FIG. 12) is demagnetized, and the forward solenoid 42a or the reverse solenoid 42b of the tab operation valve 42 is demagnetized. Therefore, both the crusher operation valve 6 and the tab operation valve 42 shown in FIG. 8 are operated to the neutral position, and both the crusher hydraulic motor 8a and the tab hydraulic motor 43 are stopped. In the present embodiment, the crusher hydraulic motor 8a and the tab hydraulic motor 43 are stopped. However, other actuators such as the conveyor hydraulic motor 45 of the conveyor 13 can be stopped in the same manner. In addition, if both 1st Embodiment and 2nd Embodiment are provided, both the effect | action of 1st Embodiment and the effect | action of 2nd Embodiment will be acquired.
[0033]
FIG. 11 is a diagram showing a third embodiment of the present invention. A controller 56 is a tab closed state detection switch (tab closed state detection means) 41 shown in FIG. 7 instead of the boarding detection switch 33 shown in FIG. The detection signals from the scattering prevention state detection switch 39 shown in FIG. 3, the extension state detection switch 40 shown in FIG. 4 and the door closing switch 36 shown in FIG. When the controller 56 determines that any one of these detection signals is interrupted, the forward solenoid 6a (58a in FIG. 12) or the reverse solenoid 6b (58b in FIG. 12) of the crusher operation valve 6 is demagnetized and the tab operation is performed. A demagnetization command is output to the forward solenoid 42a or the reverse solenoid 42b of the valve 42. At the same time, the controller 56 outputs a command to display on the display unit 57 the detection switches 36, 39, and 40 that have caused the demagnetization command to be output.
[0034]
The operation of the third embodiment will be described.
In FIG. 11, if all the detection signals from the tab closed state detection switch 41, the scattering prevention state detection switch 39, the extended state detection switch 40 and the door closing switch 36 are not input to the controller 56, As a result, the forward solenoid 6a (58a in FIG. 12) or the reverse solenoid 6b (58b in FIG. 12) of the crusher operation valve 6 is demagnetized, and the forward solenoid 42a or reverse solenoid 42b of the tab operation valve 42 is demagnetized. Therefore, both the crusher operation valve 6 and the tab operation valve 42 shown in FIG. 8 are operated to the neutral position, and both the crusher hydraulic motor 8a and the tab hydraulic motor 43 are stopped. At the same time, the detection switches 36, 39, and 40 that cause the crusher hydraulic motor 8a and the tab hydraulic motor 43 to stop are displayed on the display unit 57.
[0035]
FIG. 12 is the same as FIG. 8 except that the solenoid-driven operating valves 6, 42, 44, and 46 shown in FIG. The control hydraulic pump 57 is connected via a pilot hydraulic control valve 58 to the forward rotation pilot portion 6d and the reverse rotation pilot portion 6e of the pilot driven operation valve 6c.
[0036]
12, when the forward solenoid 58a or the reverse solenoid 58b is excited by a command from the controller 56, the pilot-driven operation valve 6c is controlled by the pilot pressure from the pilot hydraulic control 58, and the crusher The hydraulic motor 8a is rotated forward or reverse. Although FIG. 12 illustrates the hydraulic circuit of the crusher hydraulic motor 8a, the same applies to the hydraulic circuits of the dub hydraulic motor 43 and the conveyor hydraulic motor 45 shown in FIG.
[0037]
In FIG. 13, it is determined whether both the crusher 9 and the rotary tab 11 are operating in step S1. If in operation, the closing solenoid 46a is excited in step S2, and then it is determined in step S3 whether the high pressure of the lock cylinder 30 has reached a predetermined value. When the predetermined value is reached, the flow ends. If it becomes a predetermined value, it will return to step S2. If both the crusher 9 and the rotary tab 11 are not operating in step S1, the release solenoid 46b is excited in step S4, and then it is determined in step S5 whether the high pressure of the lock cylinder 30 has reached a predetermined value. When the predetermined value is reached, the flow ends. If it becomes a predetermined value, it will return to step S4.
[0038]
In FIG. 14, it is determined whether or not the crusher 9 is operating in step S1. If in operation, the closing solenoid 46a is excited in step S2 to end the flow. If the crusher 9 is not operating in step S1, it is determined in step S3 whether the rotary tab 11 is operating. If the rotary tab 11 is in operation, the closing solenoid 46a is excited in step S2 to end the flow. If the rotary tab 11 is not in operation, the release solenoid 46b is excited in step S4 and the flow is finished.
[Brief description of the drawings]
FIG. 1 is a plan view showing an overall configuration of an embodiment of the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a view taken in the direction of arrow S in FIG.
4 is a detailed view of the conveyor shown in FIG.
FIG. 5 is a view taken in the direction of arrow V in FIG. 1;
6 is a cross-sectional view taken along the line AA in FIG.
7 is a diagram showing a closed state and an open state of the rotary tab shown in FIG. 2. FIG.
FIG. 8 is a hydraulic circuit diagram of one embodiment according to the present invention.
FIG. 9 is a control block diagram showing a first embodiment according to the present invention.
FIG. 10 is a control block diagram showing a second embodiment according to the present invention.
FIG. 11 is a control block diagram showing a third embodiment according to the present invention.
FIG. 12 is a hydraulic circuit diagram of another embodiment according to the present invention.
FIG. 13 is a view showing a flowchart of the first embodiment shown in FIG. 9;
FIG. 14 is a diagram showing another flowchart of the first embodiment shown in FIG. 9;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 9 ... Crusher, 8a ... Crusher hydraulic motor, 11 ... Rotary tab, 11a ... Side wall, 12 ... Splash prevention cover, 13 ... Conveyor, 14 ... Boarding part, 15 ... Entrance / exit, 30 ... Lock cylinder, 33 ... Boarding detection Switch (boarding detection means), 34 ... door, 36 ... door closing switch (door closed state detection means), 39 ... scattering prevention state detection switch (scattering prevention state detection means), 41 ... tab closing state detection switch (tab closing state) Detection means), 43 ... Tab hydraulic motor, 45 ... Conveyor hydraulic motor, 49 ... Crusher hydraulic switch, 51 ... Tab hydraulic switch, 47 ... Hydraulic cylinder (tab tilting means), 53 ... Conveyor hydraulic switch, 56 ... Controller.

Claims (3)

The driving unit (8a, 43, 45) of the crusher (9), the rotary tab (11) and the conveyor (13) , and the boarding unit (14) on which the operator boards are different from the boarding unit (14). And an input unit that can freely input a drive command to each of the drive units (8a, 43, 45) from a location, and the rotation of the rotary tab (11) using wood that has been input to the rotary tab (11) from the outside In the wood crusher that leads to crusher (9) by crushing and discharges on conveyor (13),
Crusher (9), the rotary tub (11), the drive of the conveyor (13) (8a, 43 and 45) of at least one of operating state detecting means for detecting that an operating (49, 51 and 53 ), A boarding port closing means (30) for freely closing the entrance (15) to the boarding section (14), and a detection signal from the operating state detection means (49, 51, 53) in response to the detection signal from the boarding section (14 And a controller (56) for inputting a command for closing the doorway (15) to the boarding gate closing means (30). The driving unit (8a, 43, 45) of the crusher (9), the rotary tab (11) and the conveyor (13) , and the boarding unit (14) on which the operator boards are different from the boarding unit (14). And an input unit that can freely input a drive command to each of the drive units (8a, 43, 45) from a location, and the rotation of the rotary tab (11) using wood that has been input to the rotary tab (11) from the outside In the wood crusher that leads to crusher (9) by crushing and discharges on conveyor (13),
Boarding detection means (33) for detecting that an operator is boarding the boarding part (14), and receiving a detection signal from the boarding detection means (33), a crusher (9), a rotary tab (11) each drive unit of the conveyor (13) (8a, 43 and 45) of the safety device of the crusher, characterized in that it comprises a controller (56) for outputting a stop command to at least one. The driving unit (8a, 43, 45) of the crusher (9), the rotary tab (11) and the conveyor (13) , and the boarding unit (14) on which the operator boards are different from the boarding unit (14). And an input unit that can freely input a drive command to each of the drive units (8a, 43, 45) from a location, and the rotation of the rotary tab (11) using wood that has been input to the rotary tab (11) from the outside In the wood crusher that leads to crusher (9) by crushing and discharges on conveyor (13),
Crusher (9), the rotary tub (11), the drive of the conveyor (13) (8a, 43 and 45) of at least one of operating state detecting means for detecting that an operating (49, 51 and 53 ), A boarding opening closing means (30) for freely closing the entrance (15) to the boarding section (14), and a boarding detection means (33) for detecting that an operator is boarding the boarding section (14). ) And a command to close the entrance / exit (15) in response to the detection signal from the operating state detection means (49, 51, 53) is input to the boarding gate closing means (30), and from the boarding detection means (33) crusher receives the detection signal (9), the rotary tub (11), having drive units of the conveyor (13) (8a, 43 and 45) and a controller (56) for outputting a stop command to the at least one A safety device for a wood crusher characterized by that.

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