JPS62220123A - Slip corresponding structure 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 The present invention relates to a structure for dealing with slips in branching machines that can effectively deal with slips in drive wheels.

(B) Prior Art Conventionally, as a pruning machine that can prevent the drive wheels from slipping, a suitable number of drive wheels and idle wheels are arranged so as to be able to press around the tree trunk, and torque is transmitted to the drive wheels in the power transmission path to the drive wheels. There are two types of chainsaws: one is equipped with a limiting device and causes the limiting device to slip when the torque exceeds a set value, and the other is a chain saw that is installed in an upright position on top and is equipped with an anti-branching device.

In addition.

The latter allows the chainsaw to pass under and rise above the branches that reach the tip of the chain saw, which are prone to branch cutting.This prevents the chainsaw from lifting the machine and causes the drive wheels to slip. This is what prevents this.

(c) Problems to be solved by the invention However, in the former method using a torque limiting device,
- It may not be possible to deal with large changes in the trunk diameter of long-established trees or with trees of different diameters.Also, the latter method using a branch jamming prevention device can only cope with chain saw branch jamming. This is complicated and uneconomical, and there are other problems such as not being able to adequately deal with derailment.

(d) Means for Solving the Problem Therefore, the present invention has an appropriate number of drive wheels and idler wheels arranged so as to be able to press around the trunk of a tree, and in a power transmission path to the drive wheels, In a pruning machine, the pruning machine is provided with a transmission mechanism capable of changing speeds between a normal rotation position, a neutral position, and a reverse rotation position, the driving wheels are driven in the forward and reverse rotations by power of an engine, and one body is configured to be able to automatically ascend and descend from the trunk, A driving wheel detection sensor that detects the rotational speed of the driving wheel and an idler wheel detection sensor that detects the rotational speed of the idler wheel are provided.
A structure for dealing with slips of a pruning machine, characterized in that it is provided with a speed change control device that compares detection signals from both detection sensors and switches the speed of the speed change mechanism when the comparison value falls outside a certain set range. This is what we are trying to provide.

(E) With the above-described configuration, when the drive wheel slips and its rotational speed changes outside the set range relative to the idler wheel rotational speed, the speed changeover of the transmission mechanism is performed via the speed change control device. This means that it can cope with slippage of the drive wheels.

(F) Embodiments A preferred embodiment of the present invention will be illustratively described in detail below with reference to one drawing.

First, let us explain the general structure of the pruning machine.
As shown in the figure, an engine (1), an alternator (2),
A transmission case (5) in which a chain saw (3) and an appropriate number of driving wheels (4), etc. are arranged, and an idler wheel (6), etc. are attached to a main frame (7).
In addition, an appropriate number of idlers (6) etc. are arranged on the winding frame (8) side, and the winding frame (8) is rotated around the pivot pin (9) with respect to the main frame (7). Pivoted so that one side can be opened and closed, and both frames (7)
(8) is elastically biased toward the closed side by a detachable engagement spring (10), and these drive wheels (4) and idle wheels (6)
is provided with a predetermined upward lead angle, and the engagement/disengagement spring (1
0) is pressed against the periphery of the tree trunk (11).

The power of the engine (1) is transmitted from an output shaft (1a) protruding inside the transmission case (5) to a group of reduction gears (12), a transmission mechanism (13), each pair of reduction bevel gears (14), etc. In addition to being transmitted to the drive wheels (4) through the power transmission path (15), the power is also transmitted to the alternator (2) and chainsaw (3).
Power is transmitted via the output shaft (la). Also.

The transmission mechanism (13) has a forward rotation large gear (16) and a reverse rotation sprocket (17), which are transmitted with power via the reduction gear group (12), loosely fitted onto a transmission shaft (18).
A transmission arm (2) supports a forward/reverse clutch body (19) which is slidably spline fitted to (18) so as to be rotatable once.
0) along the transmission shaft (18) through forward shift fi! (U
) and inversion 1i! ff1 (D) through the neutral position (N), and is configured to selectively engage and disengage from both (16) and (17). Therefore, when the transmission arm (20) is in the forward rotation position (U), the forward/reverse clutch body (19) is engaged with the forward rotation large gear (16) (solid line in Figure 2), thereby causing the drive wheel ( 4) is driven in the normal direction and the body is spirally raised relative to the trunk (11), and when in the reverse position (D), is engaged with the reverse rotation sprocket (17), thereby being driven in the reverse direction and spirally lowered; Surface position (U) (D)
When it is in the neutral position (N), which is between , it is not engaged with either and the power is cut off.

By the way, as shown in Figs. 1 and 2, the slip-responsive structure of the pruning machine uses drive wheel and idler wheel detection sensors (21) to detect the rotational speed of the drive wheel (4) and idler wheel (6). (22
), and the detection signals from the one-car detection sensors (21) and (22) are input to the shift control device fig. (23) and compared. 13) is configured to perform the gear change switching.

As the driving wheel detection sensor (21), an appropriate detection sensor capable of detecting the rotation speed of the driving wheel (4) is used. Since it is proportional to the rotation speed, even if it is detected from an appropriate position in the power transmission path (15) to the drive wheels (4), it is also possible to detect the alternating current generated by the alternator (2) as in the embodiment. It may be something that has been designed for use.

The idle wheel detection sensor (22) is an appropriate detection sensor capable of detecting the rotation speed of the idle wheel (6) in the same way as the drive wheel detection sensor (21). It has become.

The speed change control device (23) has both detection sensors (21) (
The detection signal from 22) is input to the comparison circuit (25) in the controller (24), corrected to the same level, and compared. If the comparison value based on this ratio etc. is outside a certain setting range, it is output and this output is prioritized. It is input to the arithmetic circuit (26) as an output, and the arithmetic adjustment is made to select the neutral one from among those for forward rotation, neutral, and reverse rotation, and this output for neutral is input to the servo motor driver (27), and this servo The motor driver (27) drives the motor shaft (
28a) in the return direction by a predetermined amount, the disk (29),
The transmission arm (20) is switched to the neutral position (N) via the rod (30), and thereby the transmission mechanism (13) is switched to the neutral position (N). The above is to help you deal with troubles while the aircraft is ascending.
The calculation circuit (26) shows the one in which the neutral output is selected preferentially, but in order to deal with troubles during descent, the one that is selected until the priority output is input to the calculation circuit (1), for example, the forward rotation If the speed change control device (
23), the comparison circuit (25) and the arithmetic circuit (
26), a waveform shaping circuit (31) provided in a controller (24) consisting of a servo motor driver (27)
(A) or () of the gear shift switch actuating lever (33) which is waiting in a predetermined position by the constant return spring (32).
This cam portion (33a
) activates (ON) the forward rotation speed change switch (34) or reverse rotation speed change switch (35) on the corresponding side.
), and its activation signal is input.
The actuation signal input to the waveform shaping circuit (31) is waveform-shaped, subjected to calculation adjustment in the arithmetic circuit (26), and one of the signals for forward rotation, neutral rotation, and reverse rotation is selected to drive the servo motor driver. (27), and this servo motor driver (27) drives the servo motor (28
) is driven in the forward and reverse directions by a predetermined amount,
The speed change arm (2) is connected via the disc (29) and the rod (30).
0) is the forward rotation position (U), neutral position (N), and reverse rotation position (D
) in a predetermined order. In other words, the shift arm (2) in the reverse rotation position (D)
0) to the neutral position (N), operate the gear shift switch operating lever (33) in the (A) direction for the first time.
When the forward rotation side feed speed change switch (34) is activated, switching can be performed via the controller (24) and servo motor (28), and furthermore, to switch from the neutral position W (N) to the forward rotation position (U), the speed change switch (A) is activated. ) direction for the second time, and also from the normal rotation position (U) to the neutral position! To switch to (N), conversely operate the gear shift switch operating lever (33) in the (B) direction, operate the gear shift switch (35) for reverse rotation, and then switch to the neutral position! (N) to reverse displacement f
To switch to i(D), operate in the direction of (B) again. This controller (24) also includes a desired pruning height setting dial (36).
a).

When the dial (36a) reaches the set position, a signal is sent from the timer (36) to the calculation circuit (26) for calculation adjustment. The motor shaft (28) of the servo motor (28) is driven by the servo motor driver (27).
a) moves the transmission arm (20) from forward position [1 (U) to reverse position! Since the drive is controlled so that it can switch up to (D), the drive wheels (4), which are currently rotating in the forward direction, are automatically switched to the reverse drive, and the ascending aircraft can be controlled. It will be lowered relative to the trunk (11). The timer (36) in this case may be a timer based on time, or a timer based on distance measurement that counts the number of revolutions of the idler wheel (6) based on a detection signal from the idler wheel detection sensor (22). Although not shown, the engine (
1) may be stopped.

In the figure, (37) is a support plate installed in the transmission case (5), and (38) is a universal joint.

According to the above, normally, the idler wheels (6) also rotate at the same number of rotations as the drive wheels (4), which are driven in forward and reverse directions by the power of the engine (1), and the aircraft moves against the tree trunk (11). The tree is spirally raised and lowered, and the branches that are on the way up are cut with a chainsaw (3) to perform pruning work.

However, when the trunk diameter becomes smaller while the aircraft is ascending, the pressure force becomes weaker and the drive @ (4) starts to stop, and the idler wheel (
The rotation speed of the drive wheel (4) will be higher than the rotation speed of step 6) due to the slip, and the chain saw (2) may bite into the branch being cut, or the drive wheel (4) may hit a bulge on the frame surface. If a problem occurs such as the drive wheel (4) slipping and the rotation speed becoming higher than the idle wheel (6), only the rotation speed detected by the drive wheel detection sensor (21) will change from that point on. Become.

Then, when the comparison circuit (25) which receives the detection signal from the idle wheel detection sensor (22) compares and determines that the comparative value based on the ratio etc. is out of the set range, the calculation circuit (26) Direction is output. Arithmetic circuit (26)
calculates and adjusts this output as a priority output and sends the output that is the opposite of the output that was being sent up to that point (output for forward or reverse rotation), for example, if the output is for forward rotation, the output for reverse rotation is sent to the servo motor driver. (27), and the servo motor driver (27) returns the transmission arm (20) from the normal rotation position (U) to the reverse rotation position (D) via the servo motor (28), and the drive wheel (4) is rotated in reverse rotation. Drive and drive wheels (4
) troubles such as slips can be avoided.

(G) More than the effects of the invention, this invention provides the following advantages:
The respective rotational speeds of the driving wheel (4) and the idler wheel (6) are detected by the respective driving wheel and idler wheel detection sensors (21) (22), and the detection signals are compared by the speed change control device (23). ,
If this comparison value falls outside a certain setting range, the transmission mechanism (13
), the trunk diameter becomes smaller during the ascent and the drive toward the frame surface 111! The pressure contact force of (4) becomes weak and the drive wheel (4) slips.

The drive wheel (4) may hit the bulge on the surface of the trunk (11) and slip, or the chain saw (3) may slip.
) When the drive wheels (4) slip, such as when the drive wheel (4) gets jammed and the progress is hindered and slips, the gear change control device (23) automatically changes the speed of the transmission mechanism (13) and the drive wheels (4) can be handled by switching the rotation in the opposite direction, eliminating the need for a complicated structure as in the past. Additionally, this measure allows the machine to easily escape from the trouble spot, eliminating the need for the machine to come off the wheels as in the past.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the slip-resistant structure of the pruning machine according to the present invention, FIG. FIG. (Symbol) (1)...Engine (4)...Drive wheel (6)
... Idling wheel (11) ... Trunk (13)
・・Transmission mechanism (15) ・・Power transmission path (21
)...Detection sensor for driving wheels (22)...Detection sensor for idle wheels (23)...Shift control device iE? (U)...Normal transfer i! (N)
...Neutral position (D)...Reversed position procedure correction speech and behavior formula) June 25, 1986

Claims (1)

[Claims] It has an appropriate number of drive wheels (4) and idler wheels (6) disposed so as to be press-contactable around a tree trunk (11), and the drive wheels (4)
A transmission mechanism (13) capable of changing gears between a normal rotation position (U), a neutral position (N), and a reverse rotation position (D) is provided in the power transmission path (15) to connect the driving wheels (4) to the engine. (1) In a pruning machine configured to be driven in forward and reverse directions by the power of (1) and configured to be able to automatically raise and lower the machine body relative to the trunk (11), a drive wheel detection sensor (4) detects the rotation speed of the drive wheel (4). 2
1) and an idler wheel detection sensor (22) that detects the rotation speed of the idler wheel (6), and compares the detection signals from both detection sensors (21) and (22), and calculates the comparison value. A structure for dealing with slips of a pruning machine, characterized in that a speed change control device (23) is provided to change the speed of the speed change mechanism (13) when the speed falls outside a certain setting range.