JPH05153820A - Rice transplanter - Google Patents

Abstract

PURPOSE:To simplify the operation of the rice transplanter by linking an operation switch for switching a seedling-planting device into a raising state or into a lowering state with a planting clutch in a specific state. CONSTITUTION:A planting clutch 12 is switched off in interlock with the raising side operation of an operation switch SW4 for switching into a state for forcibly raising a seedling-planting device up to a pre-set position or into a state for lowering the device. When the operation switch is operated on the lowering side, the planting clutch is kept to be switched off, and on the other operation, the planting clutch is switched on to start the planting operation at a suitable timing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention connects a seedling planting device to a traveling machine body by a hydraulic actuator so that the seedling planting machine can be freely moved up and down, and transmits power from the traveling machine body side to the seedling planting machine through a planting clutch intermittently. The rice transplanter configured as described above.

[0002]

2. Description of the Related Art In the above rice transplanter, conventionally, for example, as disclosed in Japanese Utility Model Laid-Open No. 56-122321,
It is configured to raise and lower the seedling planting device by swinging the operating lever that manually operates the control valve of the lift cylinder, and in conjunction with this raising and lowering operation, the planting clutch is turned on and off, and the lowering operation is performed. In response, there has been a configuration in which the planting clutch is turned on and activated after a certain time has elapsed from the time of the operation.

[0003]

SUMMARY OF THE INVENTION The above-mentioned conventional structure has a single operation of raising and lowering the seedling planting device and disengaging the planting clutch during the turning traveling on the ridge during the planting traveling work in the field. While trying to simplify the operation by making it possible to perform the operation, when starting the planting work again after the turning, it is necessary to allow time for aligning the planting row after lowering the seedling planting device. It is designed so that the engagement operation of the planted clutch is delayed a little. However, in the above-mentioned conventional structure, the raising / lowering operation of the seedling planting device at the edge of the ridge requires a large swing operation of the operation lever and is performed together with the turning control operation of the machine body, which is a troublesome operation. Moreover, as described above, after lowering the seedling planting device, the planting clutch automatically enters the state after a certain period of time. There was room for improvement because the seedling planting operation might start unexpectedly when it was not ready. The present invention aims to eliminate the above-mentioned problems.

[0004]

The feature of the present invention is that the rice transplanter described at the beginning can be switched between a state in which the seedling planting device is forcibly raised to a preset rising position and a state in which the plant is descended. With the operation switch provided, the planting clutch is disengaged in conjunction with the ascending side operation of the operating switch, and the planting clutch is maintained in the disengaged state at the time of the descending side operation, and based on other operations, The point is that the planting clutch is configured to be turned on and operated.

[0005]

[Operation] Since the raising and lowering operation of the seedling planting device can be performed by the switch operation, when raising the seedling planting device at the edge of the ridge, the operator can respond only by switching the switch, and concentrate on the aircraft turning control operation. .. Moreover, the planting clutch is automatically disengaged during the raising operation of the seedling planting device, and the planting clutch is maintained in the disengaged state even after the planting device is lowered. There is no inconvenience. Then, if the alignment can be performed, the operator has already completed the turning control operation, so that the operator can engage and operate the planting clutch in a state where the work posture is surely prepared by another operation.

[0006]

Therefore, the operation of raising and lowering the seedling planting device can be performed by a simple operation without the trouble of swinging the operating lever to a large extent, and at an appropriate timing according to the skill level of the operator. It became possible to start planting operation, and came to be able to provide a rice transplanter that is practically convenient.

[0007]

Embodiments will be described below with reference to the drawings. Figure 3
Shows a riding type rice transplanter. This rice transplanter is configured by vertically connecting a seedling planting device 2 via a link mechanism 1 to the rear part of a riding type traveling machine body, and the link mechanism 1 is a single-acting hydraulic cylinder 3 [an example of a hydraulic actuator]. Is driven to move up and down to swing up and down freely in a state where the seedling planting device 2 is in contact with the ground and a rising posture in which the seedling planting device 2 is largely lifted upward.

In the traveling machine body, an engine 5 is mounted in a hood 4 at the front of the machine body, and a mission case 6 having a gear type main transmission 29 installed therein is provided behind the engine 5 so as to provide a space between the engine and the mission case. The belt-type continuously variable transmission 14 is installed in the vehicle, and power is supplied from the transmission case 6 to the front and rear wheels 7 and 8 to perform planting work while traveling. As shown in FIG. 2, in the continuously variable transmission 14, the pair of pulleys 16 and 16 around which the transmission belt 15 is wound are configured as split pulleys, and the split pulleys 16 and 16 are connected to the electric cylinder 17, respectively. The drive is configured to change the pulley interval via the ride-on cam mechanism 18 to perform a gear shift operation. The electric cylinder 17 is configured to be controlled and driven by the control device 22 so that the respective detection values of the potentiometer PM operated by the speed setting lever 20 arranged on the control panel 19 and the feedback sensor 21 match. There is. The seedling planting device 2 includes a seedling stand 9 on which planted seedlings are placed and reciprocally laterally moved at a constant pitch, and a planting mechanism 10 for taking out one seedling from the lower end of the seedling stand 9 and planting it in a field. , A plurality of grounding floats 11 and the like, and is configured to transmit power to the seedling planting device 2 from the mission case 6 on the machine side via the planting clutch 12 in an intermittent manner. As shown in FIG. 1, the planted clutch 12 is linked by an electric motor 13 capable of rotating in the forward and reverse directions to be engaged and disengaged via a link mechanism 23, and the engaging and disengaging operation of the clutch is performed by an operation switch SW1. is there.

During the seedling planting operation, this rice transplanter is equipped with a seedling planting device 2 for detecting the height S of the mud surface.
Elevating control means for driving and controlling the hydraulic cylinder 3 in order to maintain the ground height of the seedling planting device 2 at a predetermined value based on the information from More specifically, as shown in FIG. 1, one of the ground contact floats 11 in the center of the body width (an example of a ground contact member) is supported so as to be vertically swingable around a rear lateral fulcrum, and fluctuations in ground contact pressure against the mud surface. Based on the above, the vertical movement above the dead zone level is detected by a pair of upper and lower detection switches SW2 and SW3, and the above-mentioned mud surface height detection sensor S is configured. or,
The control valve for the hydraulic cylinder 3 is an electromagnetic 3-position switching valve V
And the solenoid valve V is connected to the mud surface height detection sensor S.
The control device 22 is configured to automatically perform switching control based on the detection result. In addition, when the seedling planting device 2 is largely raised or lowered at the edge of a field,
The elevating switch SW4 [an example of an operating switch] is forcibly operated regardless of the automatic elevating operation. The clutch operation switch SW
1, the elevating switch SW4, the speed setting lever 20, the accelerator lever 24, etc. are arranged on the right side of the control handle 25 of the control panel 19 as shown in FIG. We deploy alarm lamps 26,
A light switch 27, a fuse box 28, etc. are provided on the left side.

The elevating switch SW4 is provided in a push operation type. When the push switch is pushed once from the neutral state, it is set to the ascending operation, when it is further pushed, it is set to the descending operation, and when it is further pushed, it is returned to the neutral state. Configured. Then, when the raising / lowering switch SW4 is operated to be raised during the planting work, the planting clutch 12 is disengaged in conjunction therewith, and when it is then descended, the planting clutch 12 is maintained in the disengaged state, and the seedling planting device. It is configured that the planted clutch 12 is turned on and activated after a predetermined time has elapsed since the grounding of the vehicle 2. That is, the electric motor 13 and the solenoid valve V are configured to be controlled and driven by the control device 22, and each switch is connected to the control device 22. When the raising / lowering switch SW4 is operated to the raising side during the planting operation, the control device 22 switches the solenoid valve V to the raising driving side based on the signal and drives the electric motor 13 to plant the planting. Disengage and operate the clutch 12. Next, when the elevating switch SW4 is operated to the down side, the solenoid valve V is drive-controlled to the down side. Then, after a predetermined time elapses from the time point when the seedling planting device 2 comes into contact with the mud surface and the descending side detection sensor SW3 of the mud surface height detection sensor S changes from the detection state to the non-detection state, the electric motor 13 The reverse rotation is controlled so that the planted clutch 12 is engaged and operated.

[Other Embodiment] The lifting switch SW4 is
As shown in FIG. 5, in place of the one provided on the control panel 19 as described above, the upper portion of the main shift lever 30 for the gear type main transmission device arranged on the step portion at the lower central part of the control panel 19 It may be provided at the end, and the driver's seat 3
It may be arranged on the rear wheel fender 32 on the side of 1.

It should be noted that reference numerals are added to the claims for facilitating the comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

[Figure 1] Control system diagram

[Fig. 2] Side view of the traveling transmission system

[Figure 3] Overall side view of rice transplanter

FIG. 4 is a plan view of a control panel.

FIG. 5 is a perspective view of an elevating switch mounting portion according to another embodiment.

[Explanation of symbols]

 2 Seedling planting device 3 Hydraulic actuator 12 Planting clutch SW4 Operation switch

Claims (1)

[Claims] 1. A seedling planting device (2) is connected to the traveling machine body by a hydraulic actuator (3) so as to be freely moved up and down, and the seedling planting device () is intermittently connected from the traveling machine body side through a planting clutch (12). A rice transplanter configured to transmit power to 2), and an operation switch () that can be switched between a state in which the seedling planting device (2) is forcibly raised to a preset rising position and a descending state. SW4) is provided,
The planting clutch (12) is disengaged in conjunction with the ascending side operation of the operation switch (SW4), and the planting clutch (12) is maintained in the disengaged state during the descending side operation, and based on other operations. , A rice transplanter configured to engage and operate the planting clutch (12).