JPS63129937A - Rising automatic recovery apparatus of pruning machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention provides an automatic lifting machine for a pruning machine that can effectively recover even if the lifting of the machine body is hindered by a chainsaw's branch jamming during pruning work. It concerns a recovery device.

(B) Conventional technology Conventionally, pruning machines used engine power to drive drive wheels arranged in a suitable number on the machine body and a chainsaw installed in an upright position above, to move the machine body up and down in a spiral manner relative to the trunk of a tree. The branches along the way were cut off with a chainsaw.

(c) Problems to be Solved by the Invention Therefore, according to this type of pruning machine, during pruning work where the chain saw is spirally raised relative to the trunk, the cutting ability is particularly reduced at the tip of the chain saw. When a branch is encountered, so-called branch jamming occurs, which places an overload on the engine and causes the engine to stall, or when the drive wheels cannot get over the bulge that protrudes from the surface of the trunk, causing the engine to stall. As a countermeasure to this problem, workers had to start the aircraft's engine at the point where the engine stalled from the ground by holding a handle, but this placed a heavy burden on the workers and took a lot of time. There were problems such as wasting money.

(d) Means for Solving the Problem Therefore, the present invention has a drive wheel and an idler wheel that are placed in pressure contact around a tree trunk so as to be able to support the aircraft body, and in a power transmission path to the drive wheel, A transmission mechanism is provided in which a forward/reverse clutch body is shifted to a normal rotation position, a neutral position, and a reverse rotation position by a transmission servo motor, and the drive wheels are driven in the forward and reverse directions via this transmission mechanism to raise and lower the aircraft relative to the trunk. A branch cutting machine that drives a chainsaw equipped with a chain saw to cut a branch that is on the way up is equipped with a rotation detection sensor that detects the rotation of the idler wheel, and when the idler wheel becomes inactive while the machine is being raised. The basic configuration is such that when the rotation detection sensor detects this, the speed change servo motor is activated, and the forward/reverse clutch body in the forward rotation position can be automatically switched to the reverse rotation position only within a predetermined period of time. In this configuration, the detection signal from the rotation detection sensor is corrected with a height correction table value that takes into account the slip of the idler wheels during descent to determine the optimum lowering position of the aircraft, and the An additional feature is that when the aircraft descends, an activation signal is sent to the automatic stop device to cause the aircraft to automatically stop the descent.

(e) With the above-described configuration, when the rotation detection sensor detects that the idler wheels are inactive due to obstacles such as chainsaw cutting that prevent the aircraft from rising, the speed change servo motor is activated from this detection. Since the forward/reverse clutch body in the normal rotation position is automatically switched to the reverse rotation position only within a predetermined period of time, the aircraft will descend from the trouble spot for a predetermined period of time and then rise again.

(F) Embodiments Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

First, to explain the general structure of the pruning machine, as shown in Figs. 1 and 3, there is an engine (1), a chainsaw (2),
A transmission case (4) with an appropriate number of drive wheels (3), etc., and an idler wheel (5) etc. placed on the main frame (6) side, and an appropriate number of idler wheels (5) etc. etc. are arranged on the winding frame (7) side, and the winding frame (7) is attached to the pivot bin (
8) Pivotally mounted around the frame so that one side can be opened and closed freely, and both frames (6)
(7) is elastically biased toward the closed side by a detachable engagement spring (9), and these drive wheels (3)... and idle wheels (5)... maintain a predetermined upward lead angle. provided with
It is pressed against the periphery of the tree trunk (10) by the engagement/disengagement spring (9).

The power of the engine (1) is transmitted from an output shaft (1a) protruding inside the transmission case (4) to a group of reduction gears (11), a transmission mechanism (12), each pair of reduction bevel gears (13), etc. The power is transmitted to the yp drive wheels 3) through the power transmission path (14), and also to the chainzo (2) through the output shaft (1a). and the normal rotation position (U) of the forward/reverse clutch body (15) of the transmission mechanism (12).
Alternatively, the reverse position (D) can be switched by selectively operating the up switch (17) or down switch (18) of the transmitter (16) outside one aircraft, as shown in Fig. 2.
Each operation signal is sent to the receiver (19) on the aircraft side, and from this receiver (19), the command data identification circuit (21), command judgment circuit (22), and output circuit (
23), the corresponding forward rotation signal or reverse rotation signal is sent from this output circuit (23) to the speed change servo motor (24).
) and are configured to be remotely activated by corresponding activation. Note that when the engine (1) is started by operating the start switch (25), this signal is passed through the command data identification circuit (2), command judgment circuit (22), and output circuit (23) in the controller (20). ,
A neutral signal is sent from this output circuit (23) to the speed change servo motor (24), and this operation automatically switches the forward/reverse clutch body (15) to the neutral position (N). As a result, when the raise switch (17) of the transmitter (6) is turned on on the ground after starting the engine (1), the forward/reverse clutch body (15) changes from the neutral position (N) to the normal rotation position (
U), the drive wheels (3)... are driven forward, and the aircraft ascends in a spiral upwards relative to the trunk (10), and the branches on the way up are cut off by the chainsaw (2). When the pruning work has been completed to the desired pruning height, turn on the lowering switch (18) of the transmitter (16) and turn on the forward/reverse clutch body (15).
is switched to the reverse position (D) to drive the drive wheels (3) in the reverse direction, thereby lowering the aircraft.

By the way, the automatic lift recovery device of the pruning machine, during pruning work,
In order to avoid this trouble, when the helical ascent of the machine body is hindered by a branch of the chain saw (2), etc., the machine automatically descends in a helical manner for a predetermined period of time and then ascends again in an attempt to recover.

That is, - a rotation detection sensor (26) for detecting the number of rotations of the idler wheel (5) (in the embodiment, the idler wheel on the main frame side) is provided at a suitable location, and the rotation detection sensor (26) is connected to the rotation detection sensor (26) of the chain saw (2). An abnormal situation in which the aircraft's ascent is prevented due to a problem such as a branch jam is detected when the rotation of the idler wheels (5) has stopped and rotation cannot be detected, and this detection signal is counted in the controller (20). The signal is sent to the timer circuit (28) via the circuit (27), and the timer circuit (28) sends the reverse rotation priority signal and the forward rotation priority signal after a predetermined time to the output circuit (23), which receives both signals. The output circuit (23) sends a reverse rotation signal and a forward rotation signal to the variable speed servo motor (24) for each rotation.
The gear shifting servo motor (24) operates accordingly to switch the forward/reverse clutch body (15) to the reverse position (D) and drive the drive wheel (3).
... is driven in the reverse direction, and after a predetermined period of time, the forward rotation position (U
) to return the drive wheels (3) to normal rotation drive. Therefore, the machine immediately descends for a predetermined period of time from the point where the tip of the chainsaw (2) has clipped a branch, and then rises again, allowing the tip of the chainsaw (2) to pass under the clipped branch and avoid the clipped branch. (This is because the helical descent lead angle and helical ascent lead angle of the aircraft may deviate slightly due to the aircraft's own weight, or may deviate slightly from the forward/reverse switching point, etc.).

). However, if the trouble cannot be avoided by performing this upward recovery operation - times, it will be repeated until the trouble can be avoided once. Then, this branch is cut at a point in the middle of the chain saw (2) which has moved upward in a -pitch spiral and has a large cutting capacity.

In addition, during normal times when there is no branching, etc., and the aircraft is ascending, a positive signal for each positive rotation of the idler wheels (5) is sent from the rotation detection sensor (26) to the data memory circuit (29) via the counting circuit (27). ), and conversely, while the aircraft is descending, a negative signal is inputted to the data memory circuit (29) via the counting circuit (27) for each -reverse rotation of the idler wheels (5). The data memory circuit (29) stores subtraction from the total addition memory during the ascent, and when it reaches zero (that is, when one aircraft returns close to the ground), in reality, the idle wheels (5)... will slip when descending, so this method will cause the aircraft to reach zero at a high position, so
Data memory stores height correction table values created in advance based on experimental data for the slip when descending of the idler wheel (5), which increases in proportion to the ascending height based on the trunk of the marked tree. It is stored in the circuit (29), and based on this, the total addition memory at the time of ascent is corrected and the appropriate descending position is determined, and when it is subtracted from this correction amount and becomes zero), the (i) is output. Via the circuit (23) it is sent to an automatic shutdown device (30), for example to the ignition-subsequent electrical circuit of the engine (1).

By short-circuiting this, the engine (1) is automatically stopped. However, even if the above-mentioned ascent recovery operation is performed while the aircraft is climbing, it is inconvenient to add and subtract in the same way for the temporary descent and rise of the aircraft during the ascent recovery operation. does not occur. In addition, the transmitter (16) is equipped with an engine throttle high/low selector switch (
31), and by switching the selector switch (31) to the high speed side or the low speed side, a high speed signal or a low speed signal is input to the receiver (19), and the controller (20)
The instruction data identification circuit (21) and the instruction judgment circuit (22)
), the corresponding high-speed operation signal or low-speed operation signal is sent from this output circuit (23) to the engine throttle high/low switching servo motor (32) via the output circuit (23), and the corresponding operation is performed to control the engine (1). The pruning section may be rotated at a high speed or at a low speed, so that the pruning section can be operated at a low speed and the other sections can be operated at a high speed to improve work efficiency.

In the figure, (33) indicates that the forward/reverse clutch body (15) is in the forward rotation position (
A forward rotation manual gear in which mutual engagement claws engage when reaching U);
(34) is a reversal sprocket whose mutual engagement/disengagement claws engage when the forward/reverse clutch body (15) comes to the reversal position (D);
(35) is a universal joint.

(g) Effect of the invention As is clear from the above explanation, this invention has an idler wheel (5
)... is installed, and the rotation detection sensor (26) detects that the idler wheels (5)... become inoperable while one aircraft is ascending. As a result, the speed change servo motor (24) is activated, and the forward/reverse clutch body (15) in the forward rotation position (U) can be automatically switched to the reverse rotation position (D) only within a predetermined time. During pruning work, troubles such as the chain saw (2) getting stuck in branches, or the drive wheels (3) not being able to get over the bulge on the surface of the trunk (10) may occur, which obstruct the lifting of the machine. However, after lowering the machine from the problem area for a specified period of time, you can continue the pruning work by lowering the machine to "-H" again. )... keeps slipping and the trunk (10
) You can avoid problems such as damaging the surface. This eliminates the burden and time loss of manually starting an engine that has stalled due to branch jamming from the ground, thereby significantly improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the power transmission path of a pruning machine embodying the present invention, and FIG. 2 is a block diagram showing the same power transmission path.
FIG. 3 is a plan view of the branching machine. (Symbol) (3)...Drive wheel (5)...Idle wheel (10)
... Trunk (12) ... Transmission mechanism (14)
...Power transmission path (15)...Forward/reverse clutch body (24)...Shift servo motor (26)...Rotation detection sensor (30)...Automatic stop device (U)...Forward Transposed position (N)...Neutral position (D)
...Reverse position

Claims (1)

[Scope of Claims] 1) It has a drive wheel (3) and an idler wheel (5) that are placed in pressure contact around a tree trunk (10) and can support the aircraft, and the drive wheel ( 3) Power transmission path to... (14
), normal rotation position (U), neutral position (N), reverse rotation position (
D), the forward/reverse clutch body (15) is connected to the gear shifting servo motor (
24) is provided with a transmission mechanism (12) for changing the speed, and through this transmission mechanism (12), the drive wheels (3) are driven in forward and reverse directions to raise and lower the aircraft relative to the trunk (10), In a branch cutting machine that cuts a branch by driving a chain saw (2) equipped with a branch that is on the way up, the idler wheels (5)...
A rotation detection sensor (26) is provided to detect the rotation of the idler wheels (5), and the rotation detection sensor (26) detects that the idler wheels (5) become inoperable while the aircraft is rising. activating the speed changing servo motor (24);
An automatic upward recovery device for a pruning machine, characterized in that the forward/reverse clutch body (15) in the normal rotation position (U) can be automatically switched to the reverse rotation position (D) only within a predetermined period of time. 2) The detection signal from the rotation detection sensor (26) is
The optimum lowering position of the aircraft is determined by correcting it using a height correction table value that takes into account the slip of the idler wheels (5) when descending, and an automatic stop device (30) is provided when the aircraft descends to this determined position. 2. The automatic lifting recovery device for a pruning machine according to claim 1, wherein an operating signal is sent to the pruning machine to automatically stop the lowering.