JPH02182104A - Riding-type rice transplanter - Google Patents

Abstract

PURPOSE:To provide tht title rice transplanter intended to make turnaround at the ridge side in a sufficiently speed-reduced state, so designed that a control is made so as to effect speed reduction by turning off a planting clutch. CONSTITUTION:When a limit switch 24 detects that a planting clutch lever 23 is operated from the clutch 'on' position to other position (S), an electromotive cylinder 9 is operated to lower-speed side by a controller 18, thus putting a stepless variable speed gear 5 to speed reduction operation. Thereby, even if lifting and steering operations for a seedling planting device 6 are made after turning off a planting clutch 22, sufficient speed reduction has been attained at the beginning of steering operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a riding-type rice transplanter, and particularly to a speed change structure of a traveling system.

[Conventional technology]

When the riding rice transplanter finishes one planting process and reaches the edge of a ridge, it disengages the planting clutch to stop the seedling planting device, lifts the device, and rotates it at the edge of the ridge. I do. Therefore, for example, as disclosed in Japanese Utility Model Application No. 58-1213, when the seedling planting device is lifted and operated, the transmission for traveling is automatically operated to the low speed side, thereby ensuring safety when turning. There are things that ensure sex.

[Problem to be solved by the invention]

When the seedling reaches the edge of the ridge, the disengagement operation of the planting clutch, the lifting operation of the seedling planting device, and the steering operation are performed continuously. On the other hand, in the disclosed structure, the four-speed link mechanism for raising and lowering the seedling planting device and the transmission for traveling are linked, so the seedling planting device can be lifted up to a certain height. The structure is such that unless operated, the speed will not be sufficiently reduced to a safe speed.

As a result, if the steering operation is performed continuously while lifting the seedling planting device, a situation will occur where the steering operation is performed without sufficient deceleration, which makes it difficult to improve safety. There was room.

(2) The present invention has been made with attention to the above-mentioned problems, and an object of the present invention is to improve the safety of a riding-type rice transplanter when turning at the edge of a ridge.

[Means to solve the problem]

The feature of the present invention is that the riding-type rice transplanter as described above is configured as follows. In other words, the actuator that changes the speed of the driving transmission based on the signal from the speed change setting device and the planting clutch lever that turns the planting clutch on and off are operated from the clutch on position to another position. The present invention is provided with a sensor for detecting the speed, and a control means for forcibly automatically operating the actuator to the lower speed side based on the detection signal of the sensor, and its functions and effects are as follows.

[For production]

When one planting process is completed and the edge of the ridge is reached, the first thing to be done is to disengage the planting clutch. Therefore, according to the present invention, since automatic deceleration is performed in conjunction with the disengagement of the planting clutch, the lifting and steering operations of the seedling planting device are continuously performed after the disengagement of the planting clutch. Even so, the speed is sufficiently decelerated at the beginning of the steering operation.

〔Effect of the invention〕

As described above, by configuring the vehicle to be decelerated immediately by disengaging the planting clutch when turning at the edge of a ridge, it is possible to prevent a situation where the vehicle is not decelerated yet when the steering operation is started. This made it possible to improve safety when turning around the edge of a ridge.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, a riding-type rice transplanter which is an embodiment of the present invention will be described based on the drawings.

As shown in Fig. 2 and Fig. 1, the front wheel (1) and the rear wheel (
The engine (3), main clutch (4), and belt-type continuously variable transmission (5) are installed at the front of the aircraft supported by The riding-type rice transplanter is comprised of these.

The power from the engine (3) is then transferred to the main clutch (4).
The water is distributed from the continuously variable transmission (5) to the front wheels (1), rear wheels (2), and seedling planting device (6).

Next, to explain in detail the speed change operation structure of the continuously variable transmission (5), as shown in FIG.
The speed change operation is performed by changing the interval 5b) and changing the winding radius of the belt (5c).

Next, to explain in detail the structure for changing the interval between the half pulleys (5a) and (5b), as shown in Figs. 1 and 2, three sets of first The arm (7a), the second arm (7b), and the third arm (7c) are integrally supported in a swingable manner, and the second arm (7b)
) and the fuselage frame (8).
An electric cylinder is installed as an electric cylinder. A bell crank (10) is attached to the fuselage frame (8) so as to be swingable around the horizontal axis (P2), and a linking rod (1) is attached between the bell crank (10) and the first arm (7a).
1) is installed, and a linking rod (12) is installed across the cam mechanism (5d) that advances and retreats the half-split pulley (5a) and the bell crank (lO). Furthermore, a spring (13) that biases the first and second arms (7a) and (7b) clockwise in the drawing is attached to the third arm (7C).

Then, place the gear shift setting device (1) near the control handle (14).
5) is provided with a gear shift lever, and this gear lever (
The operation position of the first arm (15) is detected by the potentiometer (16), and the position of the first arm (7) is also detected at the horizontal axis (Pl).
Potentiometer (17) that detects the operating position of a) etc.
is installed. With the above configuration, the control device (18) expands and contracts the electric cylinder (9) based on the feedback signal from the potentiometer (17) so as to correspond to the operating position of the speed change lever (15). As a result, the continuously variable transmission (5) is shifted to a position corresponding to the operating position of the shift lever (15).

Next, to explain in detail the elevating structure of the seedling planting device (6), as shown in FIGS. 2 and 1, the seedling planting device (6) are connected,
A hydraulic cylinder (20) is attached to move the four-speed link mechanism (19) up and down. Next to the pilot's seat (21), there is a lift lever as a planting clutch lever (23) for turning on and off the planting clutch (22), and this lift lever (23) is moved to the planting position. (A
), the planting clutch (22) is turned on, and the raising and lowering of the seedling planting device (6) is controlled so that the seedling planting device (6) maintains the set height above the field surface. And (U) of the elevator lever (23) is the raising operation position, (D) is the lowering operation position, and (N) is the neutral stop position. With clutch (2
2) is turned off.

In the state shown in Figure 1, the lift lever (23) is moved to the planting position (A).
) shows the normal planting condition operated.

A contact-type limit switch is provided as a sensor (24) that detects when the lift lever (23) is operated to a position other than the planting position (A), and the lift lever (23) is operated to a position other than the planting position (A). The lever (23) is in contact with the limit switch (24). When one planting stroke is completed and the row edge is reached, the lifting lever (23) is operated from the planting position (A) to the raising operation position (U), and the planting clutch (22) is disengaged. When the seedling planting device (6) is operated, the seedling planting device (6) stops, and at the same time, the seedling planting device (6) is lifted upward and operated.

In this case, when the limit switch (24) detects that the lift lever (23) has moved away from the planting position (A), the control device (18) immediately activates the electric cylinder (9).
is operated to the low speed side, and the continuously variable transmission (5) is automatically operated to decelerate. Then, when the turning operation at the edge of the ridge is completed and the elevator lever (23) is operated again to the planting position (A), the electric cylinder (9) is operated to the position corresponding to the operating position of the speed change lever (15). Continuously variable transmission (
5) is automatically accelerated.

Further, a changeover switch (25) for cutting off the signal from the limit switch (24) is provided on the way from the limit switch (24) to the control device (18). If this changeover switch (25) is turned off, automatic deceleration as described above will not occur even if the lift lever (23) is moved to a position other than the planting position (A).

[Another example]

In the above embodiment, the elevator lever (23) is moved to the planting position (A
), the deceleration operation is performed to a certain set low speed position, but this low speed position may be changed arbitrarily.

In addition to the structure shown in FIGS. 1 and 2, a convex portion (10a) is provided on the bell crank (10) as shown in FIG. (10
b) and a four-speed linkage mechanism (19).
It is also possible to add a pin (19a) to the structure.

As a result, even if the changeover switch (25) is turned off in the embodiment described above, if the seedling planting device (6) is lifted and operated, the pin (19) of the four-speed linkage mechanism (19) is turned off.
a) comes into contact with the convex portion (10a) of the bell crank (10), and the continuously variable transmission (5) is mechanically decelerated. The amount of deceleration can be changed depending on the amount of lift of the seedling planting device (6).

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the riding-type rice transplanter according to the present invention.
The figure shows the linkage of the speed change lever, lift lever, and continuously variable transmission device of the traveling system. Figure 2 is an overall side view of the riding rice transplanter.
FIG. 3 is a side view of the vicinity of the electric cylinder in another embodiment. (5)...Transmission device for driving, (9)...
... Actuator, (15) ... Speed setting device, (22) ... Planting clutch, (23) ...
... Planted clutch lever (24) ... Sensor

Claims (1)

[Claims] An actuator (9) for shifting the driving transmission (5) based on a signal from a speed setting device (15), and a planting clutch lever (23) for turning on and off the planting clutch (22). A sensor (24) detects that the clutch is operated from the engaged position to another position, and this sensor (24)
) A riding-type rice transplanter comprising: control means for automatically and forcibly operating the actuator (9) to a lower speed side based on a detection signal of the above-mentioned actuator (9).