JPH04370008A - Sulky type paddy field working machine - Google Patents

Abstract

PURPOSE:To facilitate row setting operation by constituting a sulky type paddy field working machine in such a way that, after revolution of the working machine, a specific state appears only in a short time. CONSTITUTION:A speed reduction controlling means operates an actuator 11 with rising manipulation of a seedling planter to reduce speed of a change gear 9 and to handle the change gear at a low-speed position. After rotation of a working machine, a speed increase controlling means works the actuator 11 so that the seedling planter is handled and dropped to the vicinity of the level of paddy field and a low-speed state of traveling speed of machine body appears only in a short time. The change gear 9 is gradually accelerated and handled up to a speed change position set by a speed change lever 13.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention is directed to controlling the running speed of a riding rice paddy working machine, such as a riding rice transplanter or a riding direct sowing machine, in which a ground work device is connected to the machine body so that it can be raised and lowered. Regarding.

0002

[Prior Art] A riding rice transplanter, which is an example of a riding rice paddy work machine, uses an actuator to change the speed of a traveling transmission device and an artificial Some vehicles are equipped with a travel control means that operates an actuator so that the shift position corresponds to the operating position of the shift lever that is operated. This allows the speed change operation for driving to be easily performed using the speed change lever.

[0003] In this riding type rice transplanter, when the seedling planting device (corresponding to the ground work device) is raised when the machine reaches the edge of the ridge after completing one planting process, the actuator moves the rice transplanter for traveling. The transmission is configured to automatically reduce the speed to a predetermined low speed position regardless of the operating position of the speed change lever, so that turning can be performed at a safe low speed on the edge of a ridge. Then, when the turning at the edge of the ridge is completed and the seedling planting device is lowered to begin the next planting process, the actuator is activated and the transmission automatically shifts to the gear position set by the gear lever. The speed is increased slowly, and the speed returns to normal.

0004

In the above configuration, when the seedling planting device starts to be lowered after turning at the edge of the ridge is completed, the speed increasing operation by the actuator is started. In this case, if the seedling planting device is raised to its highest position when turning, it will take some time for the seedling planting device to descend to the vicinity of the rice field. When the vehicle descends to the working position, the transmission for traveling may have already been operated close to the normal working position set by the gear shift lever.

[0005] In a riding type rice transplanter, after turning at the edge of a ridge and before starting the next planting process, the orientation of the machine is corrected and the seedlings are placed next to the row of seedlings from the previous planting process. Perform row alignment operations to position the planting equipment. Such row alignment operation is easier to perform as the seedling planting device is located closer to the rice field, and the slower the speed of the machine is, the easier it is to perform. Therefore, if the speed of the seedling planting device has already reached close to the normal working speed when the seedling planting device is lowered to the vicinity of the rice field as described above, it may be difficult to perform this row alignment operation. As described above, the present invention provides a ride-on paddy field work machine equipped with a travel control means that automatically decelerates the travel transmission when turning at the edge of a ridge and then speeds it up again. The purpose is to make operations easier.

[0006]

[Means for Solving the Problems] The feature of the present invention is that the riding-type paddy field working machine as described above is constructed as follows. In other words, there is a deceleration control means that operates an actuator so that the traveling transmission is decelerated to a predetermined low speed position when the ground work equipment is raised, and a deceleration control means that operates the actuator to decelerate the traveling transmission to a predetermined low speed position when the ground work equipment is lowered to the vicinity of the rice field. The vehicle is equipped with a sensor for detection, and a speed increase control means for operating an actuator so that the speed of the traveling transmission is slowly increased to the speed change position set by the speed change lever based on the detection by the sensor.

[0007]

[Function] With the structure described above, when the aircraft reaches the edge of the ridge and the worker lifts the ground work device, the actuator is activated and the transmission for traveling changes to the specified position regardless of the operation position of the transmission lever. Automatically decelerates to a low speed position. Then, the turning operation is performed in this deceleration state, and when the turning at the edge of the ridge is substantially completed, the worker performs the lowering operation of the ground work device. In this case, the above-described deceleration state is maintained until the sensor detects that the ground work device has been lowered to the vicinity of the rice field. After the sensor detects that the ground work equipment has been lowered to the vicinity of the rice field, the actuator is moved from the predetermined low speed position to the original speed change position corresponding to the operating position of the speed change lever. Therefore, the speed is increased slowly.

[0008] In this way, the speed increase operation is started after the ground work equipment has been lowered to the vicinity of the rice field, so for a short time after the ground work equipment has reached the vicinity of the rice field, the traveling speed of the aircraft remains at the above-mentioned speed. The vehicle is running at low speed or slightly faster. Therefore, since the ground work equipment is located near the field surface and the traveling speed of the machine is low, it becomes easier to correct the orientation of the machine and perform row alignment operations during this time.

[0009]

Effects of the Invention As described above, in a riding paddy field work machine equipped with a travel control means that automatically decelerates the travel transmission when turning at the edge of a ridge and then speeds up again, By configuring the system so that the working device is located near the field surface and the machine is running at a low speed for a short period of time, row alignment operations are easier to perform and operability is improved.

0010

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. As shown in FIG. 3, a seedling planting device 3 (corresponding to a ground work device) is connected to the rear of the aircraft supported by front wheels 1 and rear wheels 2 by a link mechanism 4 and a hydraulic cylinder 5 so that it can be raised and lowered. A riding rice transplanter, which is an example of a riding rice paddy working machine, is configured.

As shown in FIGS. 1 and 3, the seedling planting device 3 is provided with a sled-shaped height sensor 6 that detects the height from the field surface G to the seedling planting device 3. An operating lever 14 for the seedling planting device 3 is provided on the operating panel 12, and by operating this operating lever 14 to the raised position, lowered position, and neutral position, the control valve 16 for the hydraulic cylinder 5 is operated. As a result, the seedling planting device 3 can be manually raised and lowered. When the operation lever 14 is operated to the planting position, the seedling planting device 3 starts the planting operation, and the control valve 16 is operated by the control device 7 based on the detected value of the height sensor 6, and the hydraulic cinder 5 Due to this, the seedling planting device 3 is
The height is automatically raised and lowered to maintain the set height.

Next, the transmission system for traveling will be explained. As shown in FIGS. 1 and 3, power from the engine 8 is transmitted to the gear transmission 10 from a split pulley-type continuously variable transmission 9 (corresponding to a transmission for driving) using a transmission belt, and is transmitted to the front wheels 1 and 3. The signal is configured to be transmitted to the rear wheels 2. The continuously variable transmission 9 is configured to be operated to change speed by an electric cylinder 11 (corresponding to an actuator).
The electric cylinder 11 is operated in response to an operation signal from the control device 7 so as to reach a shift position corresponding to the operation position of a shift lever 13 provided on the control panel 12.

[0013] Next, a description will be given of the flow of control when the machine reaches the edge of the ridge after completing one planting process. As shown in FIGS. 2 and 1, when the machine reaches the edge of the ridge and the operator operates the operating lever 14 from the planting position to the raised position to raise the seedling planting device 3 from the field G (step S1 ),
The electric cylinder 11 is actuated by an operation signal from the control device 7, and the continuously variable transmission 9 is automatically decelerated to the lowest speed position (corresponding to a predetermined low speed position) regardless of the operation position of the shift lever 13. (Step S2) (corresponding to deceleration control means).

[0014] In the state where the deceleration operation is performed in this way,
The worker operates the control handle 15 to perform the turning operation, and when the turning at the edge of the ridge is almost completed, the worker operates the control lever 14 to the lower position to move the seedling planting device 3 located above. lower. In the state where the seedling planting device 3 is located above the field surface G, the height sensor 6 of the seedling planting device 3 (corresponding to a sensor that detects that the seedling planting device 3 has been lowered to the vicinity of the field surface G) is lowered due to its own weight. It is in a sagging state. Therefore, when it is detected that the seedling planting device 3 has descended to the vicinity of the rice field G and the height sensor 6 has touched the rice field G and has been slightly raised (step S3), seedlings are planted based on this. The lowering operation of the device 3 is automatically stopped (step S4).

Next, after the height sensor 6 touches the ground G, the continuously variable transmission 9 moves the gear lever 13 from the lowest speed position.
The electric cylinder 11 slowly increases the speed up to the original shift position corresponding to the operating position (
Step S5). During this time, the control handle 15 is operated to correct the orientation of the aircraft and perform the row alignment operation, and after the row adjustment operation is completed, the operation lever 15 is
4 to the planting position and restart the planting work.

[0016]Although reference numerals are written in the claims for convenience of comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

[Fig. 1] A schematic diagram showing the interlocking state of the continuously variable transmission for traveling, electric cylinder, height sensor, gear shift lever, etc.

[
Figure 2: Flowchart showing the flow of control when turning at the edge of a ridge

[Figure 3] Overall side view of riding rice transplanter

[Explanation of symbols]

3 Ground work equipment 6 Sensor 9 Transmission device for driving 11 Actuator 13　Shift lever

Claims (1)

[Claims] [Claim 1] A transmission for traveling (9), an actuator (11) for operating the transmission (9) to change gears,
The actuator (11
) is equipped with travel control means for operating the ground work device (3).
) is connected to the machine body so that it can be raised and lowered, and the transmission device (9) is decelerated to a predetermined low speed position when the ground work device (3) is raised and lowered. a deceleration control means for actuating the actuator (11), and a sensor (6) for detecting that the ground work device (3) has been lowered to the vicinity of the rice field (G);
Based on the detection of this sensor (6), the transmission (9)
The actuator (11
).