JPH0755109B2 - Automatic lifting device for pruning machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (b) Industrial field of application The present invention is an automatic lifting machine for a pruning machine capable of effectively recovering even when the lifting of the machine body is hindered by branching of a chain saw during pruning work. It relates to a recovery device.

(B) Conventional technology Conventionally, a pruning machine drives the driving power of an appropriate number of wheels on the airframe and a chain saw installed upright so that the airframe spirally moves up and down with respect to the trunk of the tree and is raised. I was cutting a branch in the middle with a chain saw.

(C) Problems to be solved by the invention Therefore, according to this type of pruning machine, when pruning work in which the chain saw is spirally elevated with respect to the trunk, especially at the tip of the chain saw where the cutting ability decreases, When it reaches, so-called branch biting occurs, an overload is applied to the engine and the engine stalls,
In addition, there was a problem that the drive wheel stalls when it does not get over the bulging portion bulging from the trunk surface. And as a measure against this trouble, the operator had to start the engine starter of the aircraft at the engine stall from the ground with the operating rod, but the burden on the operator is great and it takes 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 pressed against the trunk range of a tree and are arranged so as to be able to support the machine body, and in the power transmission path to the drive wheel, A forward / reverse clutch body is provided with a speed change mechanism for changing the speed of the forward / reverse clutch body by means of a speed changing servo motor at the forward rotation position, the neutral position, and the reverse rotation position. In a pruning machine that drives and cuts a chain saw equipped with branches that are in the middle of ascending, a rotation detection sensor that detects the rotation of the idler wheel is provided, and the idler wheel becomes inactive while the aircraft is rising. When the rotation detection sensor detects that, the shift servomotor is operated, and the forward / reverse clutch body in the forward rotation position is automatically switchable within the predetermined time with priority over the reverse rotation position. The basic configuration is such that the original normal rotation position (U) is preferentially restored again so that automatic switching is possible. In this configuration, the detection signal from the rotation detection sensor is applied to the idler wheel when descending. Correct the height correction table value in consideration of the amount of slip to determine the optimal aircraft descent position, and send an operation signal to the automatic stop device when the aircraft descends to this determined position to cause automatic descent stop. This is an additional configuration.

(E) Operation With the above configuration, when the rotation detection sensor detects that the idler wheel has become inoperable due to branching of the chain saw, etc., and the idler wheel has become inoperative, the shift servomotor is activated by this detection. The forward / reverse clutch body in the forward rotation position is automatically switched to the reverse rotation position only within a predetermined time, and then automatically switched back to the original forward rotation position (U), so that the aircraft descends from the trouble point for a predetermined time. After that, it will rise again.

(F) Example Hereinafter, a specific example of the present invention will be described with reference to the drawings.

First, the schematic configuration of the pruning machine will be described. As shown in FIGS. 1 and 3, an engine (1) and a chain saw (2) are provided.
And a transmission case (4) having an appropriate number of drive wheels (3) ..., and an idler wheel (5) on the main frame (6) side, and an appropriate number of idler wheels (5). ... etc. are arranged on the winding frame (7) side, and the winding frame (7) is pivotally attached to the main frame (6) around the pivot pin (8) so that the winding frame (7) can be freely opened and closed. The frames (6) and (7) are elastically biased toward the closed side by detachable engagement and disengagement springs (9), and the drive wheels (3) ... And the idle wheels (5). It is provided with a lead angle so that it is pressed against the periphery of the tree trunk (10) by the engagement and disengagement spring (9).

The power of the engine (1) is transmitted from the output shaft (1a) abutting in the transmission case (4) to the reduction gear group (11) and the speed change mechanism (1).
2), each pair of deceleration bevel gears (13) ... Is transmitted to the drive wheels (3) through the power transmission path (14), and also to the chain saw (2), the output shaft ( It has been transmitted via 1a). Switching between the forward rotation position (U) and the reverse rotation position (D) of the forward / reverse clutch body (15) of the speed change mechanism (12) is performed by the transmitter (16) outside the body as shown in FIG. Up switch (17) or Down switch (1
By operating 8) one by one, each operation signal is sent to the receiver (19) on the machine side, and the command data identification circuit (21) and command judgment circuit in the controller (20) are sent from this receiver (19). (22), output circuit (23), this output circuit (23)
A corresponding forward rotation signal or reverse rotation signal is sent from the to the speed changing servomotor (24) and is remotely operated by corresponding operation. When the engine (1) is started by operating the start switch (25), this signal passes through the command data identification circuit (21), command judgment circuit (22) and output circuit (23) in the controller (20), A neutral signal is sent from the output circuit (23) to the shifting servomotor (24), and the forward / reverse clutch body (15) is automatically switched to the neutral position (N) by this operation. As a result, after the engine (1) is started, when the ascending switch (17) of the transmitter (16) is turned on the ground, the forward / reverse clutch body (15) is switched from the neutral position (N) to the normal position (U). The drive wheels (3) are driven in the forward direction to spirally ascend the machine body with respect to the trunk (10), and the branches on the way up are cut by the chain saw (2), allowing pruning work to reach the desired pruning height. Around this time, the lower switch (18) of the transmitter (16) was turned on and the forward / reverse clutch body (15) was turned to the reverse position (D).
, And the drive wheels (3) are driven in the reverse direction to lower the machine body.

By the way, the lifting automatic recovery device of the pruning machine
Avoid this problem when the chain saw (2) is being chewed, or when the drive wheel (3) ... does not ride over the bulging part that bulges from the surface of the trunk (10), etc. For this reason, the spiral is automatically lowered once for a predetermined time, and then the spiral is raised again for recovery.

That is, a rotation detection sensor (26) for detecting the number of rotations of the one idler wheel (5) (in the embodiment, the idler wheel on the main frame side) is provided at a proper position, and the rotation detector sensor (26) is connected to the chain saw (2). During abnormalities such as when the branch is chewed, or when the drive wheel (3) ... is unable to climb over the bulging part that bulges from the surface of the trunk (10), etc. The rotation is stopped so that the rotation cannot be detected. This detection signal is sent to the timer circuit (28) via the counting circuit (27) in the controller (20), and the output circuit (from the timer circuit (28) 23) The reverse rotation priority signal and the forward rotation priority signal are sent after a predetermined time, and the output circuit (23) sends the reverse rotation signal and the forward rotation signal to the shifting servomotor (24) every time both signals are received. The servomotor for shifting (24 ) Correspondingly operates to automatically switch the forward / reverse clutch body (15) prior to the reverse rotation position (D) to drive the drive wheels (3) ... The drive wheels (3) ... Are automatically returned to the normal rotation drive in preference to (U). Therefore,
When the tip of the chain saw (2) branches off, or when the drive wheels (3) ... can not ride over the bulging part that bulges from the surface of the trunk (10) and it stops at that position. Immediately after descending from that point for a predetermined time, it rises again and the tip of the chain saw (2) can pass under the branched branch to avoid it, and the drive wheels (3) ... ) Even when it stops at the bulge on the surface, it immediately descends for a predetermined time and rises again to avoid the drive wheels (3) ... from the bulge (this is the spiral descending lead angle of the fuselage). When,
The lead angle of spiral rise may be slightly deviated due to the weight of the aircraft,
This is due to a slight shift at the forward / reverse switching point. ). However, if the trouble cannot be avoided by one such rising recovery operation, it will be repeated until it can be avoided. Then, in the case of avoiding branch biting, this branch is cut at a position with a large cutting ability in the middle part of the chain saw (2) that has risen by one pitch. In addition, the drive wheels (3) ...
0) Even when avoiding the bulging portion on the surface, the bulging portion can be avoided and re-elevation can be performed by the same method.

In addition, in normal times, when there is no branch or bulge on the surface of the trunk (10), the rotation detection sensor (26) moves the idler wheel (5)
..A plus signal for each positive rotation is additionally stored in the data memory circuit (29) via the counting circuit (27), and conversely, while the aircraft is descending, the idle wheel (5) ... Each minus signal is input to the data memory circuit (29) through the counting circuit (27), subtracted from the total addition memory at the time of rising stored in this data memory circuit (29), and becomes zero. At that time (that is, when the aircraft has returned to near the ground, but in reality, the idler wheels (5) ... slip when descending, so in this procedure the aircraft becomes zero at a high position. The height correction table value created based on the experimental data of the slip of the idler wheel (5), which increases in proportion to the rising height of the standard tree as it descends, is stored in the data memory circuit ( 29), and based on this, the total addition memory when rising was corrected When the positive descent position is determined and subtracted from this correction amount to zero), the signal goes through the output circuit (23) to the automatic stop device (30), for example, the ignition primary electric circuit of the engine (1). It is sent and short-circuited to automatically stop the engine (1). However, even if the above-mentioned climb recovery operation is performed while the aircraft is climbing, this kind of addition / subtraction method does not cause any inconvenience even if the aircraft temporarily undergoes climb / descent during climb recovery operation. Absent. Further, the transmitter (16) is provided with an engine throttle height change switch (31), and by switching the changeover switch (31) to the high speed side or the low speed side, a high speed signal or a low speed signal is received by the receiver (19).
To the command data identification circuit (21), the command judgment circuit (22), and the output circuit (23) in the controller (20),
The output circuit (23) sends a corresponding high-speed operation signal or low-speed operation signal to the engine throttle height switching servo motor (32) to operate the engine (1) correspondingly.
May be allowed to rotate at high speed or low speed,
As a result, the pruning work section can be slowed down, and the other sections can be sped up to increase the operating efficiency.

In the figure, (33) is the forward / reverse clutch body (15) in the forward rotation position (U).
When it comes to the
4) is a reverse rotation sprocket with which the engagement and disengagement pawls engage when the forward / reverse clutch body (15) reaches the reverse rotation position (D), (35)
Is a universal joint.

(G) Effect of the Invention As is clear from the above description, the present invention is a rotation detecting sensor (26) for detecting the rotation of the idler wheels (5).
And the rotation detection sensor (26) detects that the idler wheels (5) ... have become inactive while the aircraft is climbing, thereby operating the shift servomotor (24), Since the forward / reverse clutch body (15) in the forward rotation position (U) is configured to be automatically switchable over the reverse rotation position (D) only within a predetermined time, the chain saw (2) can be branched during pruning work. Even if there is a problem that the climbing of the aircraft is obstructed because the driving wheels (3) ... can not ride over the bulging part on the surface of the trunk (10), the aircraft will descend from the trouble location for a predetermined time. After this, the pruning work can be continued by raising it again, and the trunk (10) continues to stall at the branching point or the drive wheels (3) ... continue to slip at the bulging point as in the conventional case.
You can avoid troubles such as scratching the surface. As a result, in particular, the burden and time loss of starting the engine stalled by branching from the ground with the operating rod,
There is no time loss such as the drive wheels (3) slipping and stopping at the same position, which can significantly improve work efficiency and also reduce fuel consumption, which is economical. Excel.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing a 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 same pruning machine. (Code) (3) …… Drive wheel, (5) …… Idle wheel (10) …… Stem, (12) …… Transmission mechanism (14) …… Power transmission path (15) …… Forward / reverse clutch body ( 24) …… Shift servomotor (26) …… Rotation detection sensor (30) …… Automatic stop device (U) …… Normal rotation position, (N) …… Neutral position (D) …… Reverse rotation position

Claims (2)

[Claims] Claims: 1. Drive wheels (3) ... and idler wheels (5), which are arranged in pressure contact with the periphery of a tree trunk (10) so as to support the machine body.
············, and in the power transmission path (14) to the drive wheels (3), ... A gear shift mechanism (12) for switching gear shift of the gear (15) by a gear shift servomotor (24) is provided, and the drive wheels (3) ... ), And in the pruning machine that cuts by driving a chain saw (2) equipped with branches that are in the process of rising, a rotation detection sensor (26) for detecting the rotation of the idler wheels (5). ) Is provided, and the rotation detection sensor (26) detects that the idler wheels (5) ... have become inactive while the aircraft is climbing, thereby operating the shift servomotor (24). , The forward / reverse clutch body (15) in the forward rotation position (U) is given priority over the reverse rotation position (D) only within a predetermined time. Dynamic switchably configured preferentially increased automatic recovery device trimmer, characterized in that so as to automatically switchable restored by again to the original forward position thereafter (U). 2. An optimum aircraft descent position by correcting the detection signal from the rotation detection sensor (26) with a height correction table value that allows for the slip of the idler wheels (5) ... When descending. The pruning machine according to claim 1 is characterized in that when the machine descends to the determined position, an automatic stop device (30) is sent an operation signal to automatically descend the machine. Lift automatic recovery device.