JP4037092B2 - Tree crusher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tree pulverizer that pulverizes felled trees, pruned tree branches, and the like into chips.
[0002]
[Prior art]
A tree crusher that crushes objects to be crushed, such as felled trees and pruned tree branches into chips, is generally fed into a hopper through a crusher that crushes the object to be crushed with a cutter wheel and an inlet. A feed device that feeds the material to be crushed into the pulverizer and an engine that is a power source of the pulverizer and the feed device are provided (see Japanese Patent Laid-Open No. 2000-084906).
[0003]
In such a dendrite pulverizer, the pulverized product crushed into chips is likely to be clogged due to accumulation in the radiator of the engine due to wind or the like. When clogging occurs, the function of the radiator decreases and the engine becomes difficult to be cooled, so that overheating is likely to occur. If the operator continues to work without being aware of the overheating, the engine may be damaged.
[0004]
[Problems to be solved by the invention]
However, if the engine is stopped immediately after the overheating, the pulverizing device is clogged and the pulverizing device becomes inoperable, so that the pulverized material clogged in the pulverizing device is manually removed to resume operation. Work is required.
The present invention solves the above-described problem in the tree crusher, and when the engine is overheated, the engine is automatically stopped to prevent damage, and the crushing device is not clogged. It is another object of the present invention to provide a tree pulverizer that eliminates the need for manual removal of pulverized material.
[0005]
[Means for Solving the Problems]
In the present invention, in order to solve the above-described problems, an input port into which the material to be crushed is charged, a pulverizing device for pulverizing the material to be pulverized with a cutter wheel, and the material to be pulverized charged from the input port into the pulverizer stop the feeding device, the dendritic grinder equipped with an engine as a power source for the crusher and feeder, the overheat detector for detecting an overheating of the engine, only the feeding device when the overheating of the engine is detected to feed is (feeder stop means) is provided with a control device which is configured to stop the crusher (crusher stopping means) by the control of Ru stopping the engine after a predetermined time has elapsed.
[0006]
In this tree pulverizer, when the engine overheats, the overheat detector detects the overheat and sends a detection signal to the control device. The control device immediately sends a control signal to the feeding device to stop the feeding device, and then sends a control signal to the engine after a predetermined time elapses to stop the engine. When the engine stops, the crusher also stops operating.
After the feeder stops and the feed of the material to be crushed into the pulverizer is stopped, the pulverizer continues to operate for a predetermined time until the engine stops. The pulverizer does not become inoperable when discharged from the apparatus and restarting operation.
[0007]
Therefore, the operation | work which removes the pulverized material clogged in the crushing apparatus by human power becomes unnecessary.
In addition, if the tree crusher is provided with a warning means for issuing a warning when engine overheating is detected, it can be distinguished from the stoppage of the feeder caused by other causes.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a side view showing a configuration of a dendrite pulverizer according to an embodiment of the present invention, and FIG. 2 is a hydraulic circuit diagram of the dendrite pulverizer.
This dendrimer crusher 1 includes an inlet 2 through which a material to be crushed Z is charged, a pulverizing device 3 that pulverizes the material Z to be crushed, and a pulverizing device 3 from which pulverized material Z is charged into the hopper 6 from the inlet 2. The hopper 6, the feeding device 4, and the crushing device 3 are disposed on the base frame 5.
[0009]
The feeding device 4 includes a feeding drum 41 that is driven by a feeding hydraulic motor 11, and an object to be crushed Z such as a felled tree or a pruned tree fed from the insertion port 2 By the rotation of 41, the hopper 6 is fed into the pulverizer 3.
The pulverizing apparatus 3 includes a cutter wheel 32 having several cutter knives 31 for shearing and grinding the object to be crushed Z, and further pulverizing the object to be crushed and sheared by the cutter knife 31. And a fan blade 34 for discharging the crushed chips out of the pulverizing apparatus 3 by wind power. The cutter wheel 32, the hammer knife 33, and the fan blade 34 are attached to a common rotating shaft 35, and high speed rotation is given by the crushing hydraulic motor 12.
[0010]
A chip discharge pipe 36 is provided at the top of the crushing device 3. In addition, adjacent to the crushing device 3, a power package 7 including auxiliary devices such as an engine 13, a crushing hydraulic pump 14, and a feeding hydraulic pump 15 is disposed on the base frame 5.
A grinding hydraulic pump 14 and a feeding hydraulic pump 15 are connected to the output shaft of the engine 13. The crushing hydraulic pump 14 has a suction side connected to a tank 16 and a discharge side connected to a drive line 17 of the crushing hydraulic motor 12. A crushing control valve 18 is provided in the drive line 17 of the crushing hydraulic motor 12. The crushing control valve 18 is a two-position manual operation switching valve, and by operating its lever, the pressure oil from the crushing hydraulic pump 14 is supplied to the crushing hydraulic motor 12 or can be switched off. it can. Accordingly, the operation of the crushing hydraulic motor 12 is controlled by the operation of the crushing control valve 18.
[0011]
The feed hydraulic pump 15 has a suction side connected to the tank 16 and a discharge side connected to a drive line 21 of the feed hydraulic motor 11. A feed control valve 23 is provided in the drive line 21 of the feed hydraulic motor 11. The feed control valve 23 is a two-position electromagnetic switching valve that supplies pressure oil from the feed hydraulic pump 15 to the crushing hydraulic motor 12 or a return line 24 according to a control signal sent from the control device 8 to the solenoid. You can switch whether to unload to the side. Therefore, the control device 8 controls the operation and stop of the feed hydraulic motor 11.
[0012]
Here, the engine 13 is provided with an engine water temperature detection switch 9 for detecting overheating. The engine water temperature detection switch 9 sends an overheat detection signal to the control device 8 when the engine water temperature exceeds a predetermined temperature.
Further, a pressure switch 19 for detecting the load of the crushing hydraulic motor 12 is provided in the drive line 17 of the crushing hydraulic motor 12. The pressure switch 19 sends an overload detection signal to the control device 8 when the pressure in the drive line 17 exceeds a predetermined pressure.
[0013]
Further, the tree crusher 1 is provided with a warning lamp 10 that is turned on by a warning signal from the control device 8 as warning means for issuing a warning when overheating of the engine 13 is detected.
In addition, as a warning means, other means, such as a horn that emits a warning sound and a display device that displays a warning message, can be used.
When the object to be crushed Z such as a felled tree or a pruned tree branch is input to the input port 2, the tree pulverizer 1 sends the object to be crushed Z into the pulverizer 3 by the feeding device 4. The powder is crushed into chips by the pulverizer 3 and discharged from the discharge pipe 36.
[0014]
When the load of the crushing device 3 increases during the crushing operation and the hydraulic pressure of the drive line 17 of the crushing hydraulic motor 12 rises and exceeds a predetermined pressure, the pressure switch 19 is activated and an overload detection signal is sent to the control device 8. send.
Then, the control device 8 sends a control signal to the feed control valve 23 and switches the feed control valve 23 to the stop side to stop the feed hydraulic motor 11. Therefore, the feeding of the object Z to be crushed by the feeding device 3 is temporarily stopped. At this time, the warning lamp 10 is not turned on.
[0015]
When the feeding of the object to be crushed Z is stopped and the load is reduced, the hydraulic pressure of the drive line 17 of the pulverizing hydraulic motor 12 decreases and the pressure switch 19 returns to the non-operating side. A control signal is sent to the valve 23, and the control valve 23 is switched to the sending side to resume feeding.
In the tree pulverizer 1, when the engine 13 is overheated during the pulverization operation and the engine water temperature exceeds a predetermined temperature, the engine water temperature detection switch 9 sends an overheat detection signal to the control device 8.
[0016]
The control device 8 immediately sends a control signal to the feed control valve 23 and switches the feed control valve 23 to the stop side to stop the feed hydraulic motor 11. Accordingly, feeding is stopped in the crush material Z by the feed device 3 (feeder stopping means). At the same time, the control device 8 sends a warning signal to the warning lamp 10 to turn on the warning lamp 10 to notify the operator that the engine 13 is in an overheated state. Then, after a predetermined time has elapsed, the control device 8 sends a control signal to the engine 13 to stop the engine 13. When the engine 13 is stopped, the pressure oil is not supplied from the crushing hydraulic pump 14 to the crushing hydraulic motor 12, so that the operation of the crushing device 3 is also stopped (crushing device stopping means) .
[0017]
Although the time lag until the engine 13 is stopped after stopping the feeding device 3 can be appropriately set according to the working conditions, it is set to about 15 seconds here.
The engine 13 is stopped by turning off the starter switch and completely cooled. Then, after maintenance of the engine, radiator, etc. is performed, the starter switch is turned on again to start the engine, and the operations of the crushing hydraulic pump 14 and the feeding hydraulic pump 15 are resumed.
[0018]
At this time, the engine water temperature has fallen below the predetermined temperature, and the engine water temperature detection switch 9 has returned to the non-operating side. Therefore, the control device 8 switches the feed control valve 23 to the feed side, and Resume feeding.
In this tree pulverizer 1, the crushing device 3 continues to operate for a predetermined time until the engine 13 stops after the feeding device 4 stops and the feeding of the material Z to be crushed into the crushing device 3 is stopped. The pulverized product is discharged from the pulverizer 3 until the pulverizer 3 is stopped. Therefore, the crushing device 3 does not become inoperable when the operation is resumed.
[0019]
Therefore, it is not necessary to remove the pulverized material clogged in the pulverizing apparatus 3 by human power.
Further, the tree crusher 1 is provided with a warning light 10 that is turned on when overheating of the engine 13 is detected, and the stop of the feeding device 4 caused by other causes such as overloading of the crushing device 3, and the engine 13 can be distinguished from the stoppage of the feeding device 4 due to overheating of 13, so that the operator can take appropriate measures according to the cause.
[0020]
【The invention's effect】
As described above, the dendrimer crusher of the present invention can automatically stop the engine and prevent damage when the engine overheats.
In addition, the pulverized product is not clogged in the pulverizer when the engine is stopped, and the removal work of the pulverized product by human power is unnecessary.
[Brief description of the drawings]
FIG. 1 is a side view showing a configuration of a dendrite pulverizer according to an embodiment of the present invention.
FIG. 2 is a hydraulic circuit diagram of a tree crusher.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tree branch crusher 2 Input port 3 Crushing device 4 Feeding device 5 Base frame 6 Hopper 7 Power package 8 Control device 9 Engine water temperature detection switch 10 Warning light 11 Feeding hydraulic motor 12 Grinding hydraulic motor 13 Engine 14 Grinding hydraulic pump 15 Hydraulic pump 16 for feeding 16 Tank 17 Drive line 18 Grinding control valve 21 Drive line 23 Feed control valve 24 Return line Z Object to be crushed

Claims (2)

A dendritic crusher comprising a crushing device for crushing a material to be crushed with a cutter wheel, a feeding device for feeding the material to be crushed from the inlet into the crushing device, and an engine as a power source for the crushing device and the feeding device Because
An overheat detector for detecting engine overheating, and a control device for controlling the engine to stop in response to an overheat detection signal from the overheat detector ;
The control device includes: a feed device stop unit that stops only the feed device when the overheat detector detects the overheat of the engine; and a predetermined amount after the feed device stop unit stops only the feed device. And a crushing device stop means for stopping the crushing device by stopping the engine after a lapse of time .   2. A dendrite pulverizer according to claim 1, further comprising warning means for issuing a warning when engine overheating is detected.

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