JPH0341123B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation control method when using a float of a rice transplanter for leveling a headland or the like.

This type of control system uses a sensing valve to sense the levitation force applied to the float to control the elevation of the planting machine, and also adjusts the operating sensitivity of the sensing valve using a sensitivity adjustment means to control the hardness and softness of the field. We are making it possible to adapt to. When leveling the headland etc. with a float, the sensitivity adjustment means is set to the least sensitive level so that the float applies sufficient force to press the field surface in order to level out the ruts of the running wheels on the headland. It is set in the correct condition and used. However, in cases where the field is relatively firm, the sensing valve may be operated and switched to the pressurizing position (lift side) despite the sensitivity adjustment means suppressing the sensing valve's operation. This makes it impossible to perform leveling work as expected.

The present invention has been made based on the above circumstances, and is designed to lock the sensing valve from switching to the pressurized position when the sensitivity adjustment means is set to the least sensitive state. This paper aims to provide an operation control method for a rice transplanter.

For this purpose, the present invention detects the levitation force applied to the float by a sensing valve to control the elevation of a planting work machine, and adjusts the operating sensitivity of the sensing valve by a sensitivity adjustment means.
A lock operated by the sensitivity adjusting means is configured to lock the operation of the sensing valve before the sensing valve is switched to the pressurized position when the sensitivity of the sensing valve by the sensitivity adjusting means is damped to the maximum. It is characterized by being equipped with means.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.

In the figure, reference numeral 1 is a running vehicle body of a riding type rice transplanter, and the front side of this running vehicle body 1 is equipped with a front wheel 2 as a steering wheel, and the rear side is equipped with a rear wheel 3. A portion of the output from the engine mounted on the vehicle is transmitted to the front wheels 2 and rear wheels 3, allowing the vehicle to run on its own. Furthermore, the traveling vehicle body 1 has a control section consisting of a driver's seat 4, a handle 5, etc., and a planting work machine 7 is attached to the rear end of the traveling vehicle body via a lifting mechanism 6 consisting of a parallelogram link mechanism. ing.

The above-mentioned planting work 7 is performed by disposing a seedling stand 9 on the machine body 8 and supporting it with slide guides 10 and 11, and from the seedling take-out port of a seedling receiving member 12 placed corresponding to the lower end of the seedling stand 9. The planting body 13 is capable of cutting and planting one pine-shaped seedling, and the planting machine 7 is equipped with a center float 14 and side floats 15 on the lower side so that it can float above the rice field. . Above center float 14
is connected to the fuselage 8 via a spool-type sensing valve 16 at its front. That is, the sensing valve 16 connects the valve housing 16a to the aircraft body 8.
The spool rod 16b is pivotally connected to the center float 14, and the spool 16c has three positions within the valve housing 16a: pressure position A, lock position B, and exhaust pressure position C. Constructed to have points.

Further, the sensitivity adjusting means 17 for adjusting the sensitivity of the sensing valve 16 includes links 17a and 17b that are pivotally connected to respective pivot points of the sensing valve 16, and both links 17a and 17b are connected to each other at one end. The inner wire 18a of the control wire 18 is connected to one link 17a via a spring 19. The inner wire 18a of the control wire 18 is connected to a sensitivity adjustment lever 20 provided on one side of the driver's seat 4, and a portion of the sensitivity adjustment lever 20 is connected to the vehicle body 1 via a universal joint. It is centrally supported. A control panel 21 corresponds to the lever 20, and a sensitivity setting position is selected here.
There is a guide slit 22 having a locking groove 22a for maintaining its sensitivity state, and the lever 20 passes through the guide slit 22.

The sensitivity adjustment lever 20 is operated by a spring 1 in order to maintain the sensing valve 16 in the least sensitive state.
When the control wire 9 is inserted into the locking groove 22b with maximum tension, the locking means 23 is operated by the branch wire 18b provided on the inner wire 18a of the control wire 18.

The locking means 23 is provided with a shoe 23b at the lower end of a lever 23a which is pivotally supported by a pin of the body 8, and the lever 23a is provided with a shoe 23b.
are connected, and are resiliently supported by a spring 24 in a direction opposite to the direction in which the branch wire 18b is pulled. Even if the sensing valve 16 operates and the spool rod 16b is pushed up when the lever 23a is pulled and assumes a vertical position,
Before the spool 16c is switched to the pressurized position (lift), the shoe 23b hits the float 14, preventing further movement of the sensing valve 16 and locking it.

On the other hand, on the other side of the driver's seat 4, there is a hydraulic lever 25 and a planting lever 26, which are inserted into guide slits 28 and 29 bored in the operation panel 27, respectively. a lower lift position a in which the sensing valve 16 is placed in that position in order to pressurize the hydraulic cylinder 30; a neutral position b in which the sensing valve 16 is placed in the lock position in order to lock the hydraulic cylinder 30; and a sensing position in which the hydraulic cylinder 30 is supplied with pressure oil and pressurized. A lift position c is provided in which the valve 16 is placed in a pressurized position. Further, the guide slit 29 is set with two positions in which a planting clutch (not shown) is switched on and off depending on the position of the planting lever 26 therein.

The construction of the hydraulic line between the sensing valve 16 and the hydraulic cylinder 30 is shown in detail in FIG.
Here, oil in an oil tank 33 is supplied by a pump 32 to the hydraulic cylinder 30 via the sensing valve 16, and when pressure oil is supplied to the hydraulic cylinder 30, the lifting mechanism 6 It is now possible to raise the In addition, in the figure, the reference numeral 34 is a safety valve.

Next, the operation of this operation control method will be explained. During normal rice planting work, the planting lever 26 is shifted to the planting clutch-on position, and the hydraulic lever 25 is also in the lift lowering position a. Further, the sensitivity adjustment lever 20 is placed in one of the lock grooves 22a selected depending on the hardness or softness of the field. As a result, the sensing valve 16 becomes free and the float 1
Spool rod 16b receives the levitation force applied to 4.
up and down, pressure position, lock position,
The switching operation is performed for the three points of the exhaust pressure position, and the pressure on the hydraulic cylinder 30 is switched between pressurization, locking, and exhaust pressure, and the relative level between the planting machine and the float is maintained within a certain range to automatically adjust the planting depth. Make adjustments.

To interrupt rice planting work, use the planting lever 26.
is shifted to clutch-off, thereby stopping the planting body 13. When performing operations such as turning in the field, the hydraulic lever 25 is switched to the lift position c. As a result, the sensing valve 16 is forcibly set to the pressurized position, so that pressure oil is supplied to the hydraulic cylinder 30, and the planting machine 7 is placed in a lifted state. After that, move the hydraulic lever 25 to the neutral position b.
When the hydraulic cylinder 30 is placed in the
becomes locked.

When leveling the headland, the sensitivity adjustment lever 20 is inserted into the lock groove 22b. As a result, the sensing valve 16 receives the maximum tension of the spring 19 and becomes insensitive. Moreover, in this state, the branch wire 18b pulls the lever 23a to make it vertical, so there is no excessive load on the float 14. is applied, the sensing valve 16 lifts the float 14 before switching to the pressurized position (lift) as described above.
When it hits the shoe 23b, its operation is blocked and a locked state is established. Therefore, leveling work can be reliably accomplished regardless of the load applied to the float.

Once the headland has been leveled in this way,
The sensitivity adjustment lever 20 is returned to one of the lock grooves 22a so as to be at a predetermined sensitivity position, and the specifications for turning the rice transplanter are operated.

In the embodiment shown in FIG. 5, the link 11a and the valve housing 16a are pivotally connected to a support member 35 that is pivotally connected to the fuselage 8, and the lever 23a is connected to the support member 35. is supported by elastic means (not shown). and,
The lever 23a is provided with the same shoe 23b as described above and also has a pin 23c, and a piece 36 with a slit 36a into which the pin 23c is inserted is connected to the spring 19.

Even in this configuration, the lock groove 22 is adjusted so that the maximum tension of the spring 19 acts on the sensitivity adjustment lever 20.
When the lever 23a is engaged with the lever 23a, the lever 23a stands upright.
Locking of the sensing valve 16 can be achieved by the shutter 23b.

In this manner, according to the present invention, when the sensitivity adjustment means is set so that the sensing valve is in the least sensitive state, the locking means acts to prevent the sensing valve from switching to the pressurized position. , it is effectively locked, so even if a float is used for leveling work on headlands, the planting machine will not have to be lifted and the intended leveling work can be carried out reliably and completely. Effects can be obtained.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
3 is a side view showing the control system of the sensing valve, FIG. 4 is a circuit diagram of the hydraulic control system, and FIG. 5 is a side view showing the control system of the sensing valve in another embodiment. be. 1... Running vehicle body, 2... Front wheel, 3... Rear wheel, 4
...driver's seat, 5...handle, 6...lifting mechanism,
7... Planting machine, 8... Seedling mounting stand, 10, 11
...Slide guide, 12...Seedling receiving member, 13
... Planted body, 14 ... Center float, 15 ...
Side float, 16... Sensing valve, 16a...
...Valve housing, 16b...Spool rod, 16
c... Spool, 17... Sensitivity adjustment means, 17
a, 17b...link, 18...control wire, 18a...inner wire, 18b...branch wire, 19...spring, 20...sensitivity adjustment lever, 21...operation panel, 22...guide slit, 22a, 22b ...Lock groove, 23...Lock means, 23a...Lever, 23b...Show,
23c...Pin, 24...Spring, 25...
Hydraulic lever, 26... Planting lever, 27... Operation panel, 28, 29... Guide slit, 30... Hydraulic cylinder, 32... Pump, 33... Oil tank, 34... Safety valve, 35... Support member , 36...
...piece, 36a...slit.

[Claims]

1 At the tip of the arm 9c, there is a cylindrical case 12 for taking in fruit, a stalk pressing member 14 that can be freely projected and driven so as to press and support the stalk in a predetermined position, and a pair of blade edges.
A fruit harvesting hand H equipped with each of the fruit stem cutting cutters 15 that can be freely protruded and driven so as to insert the fruit stem at the predetermined position into the cutting recess 35 formed between Sa and Sb is arranged in series, control to cause the stem pressing member 14 to protrude, to cause the stem cutting cutter 15 to protrude, and to cause the cutter 15 to cut after the cutter protrusion is completed, based on information on detecting fruit taken into the fruit stem 12; The fruit harvesting device is provided with a means for directing a deep part of the cutting recess 35 in a direction in which the cutting recess 35 approaches the fruit stem after the cutter protrusion operation is completed and before the cutter cutting operation is started. A fruit harvesting device comprising means for actuating said arm 9c to move the entire hand.