JPH0238574Y2 - - Google Patents

Description

[Detailed description of the invention] This invention combines a control valve for controlling wheel elevation linked to a ground float and an energized planting clutch into a single operating lever installed at the rear of the seedling stand. This control lever is linked with wires,
A first operating position where the control valve is automatically operated when the planting clutch is engaged, a second operating position where the control valve is automatically operated when the planting clutch is disengaged, and a third operating position where the control valve is neutrally locked when the planting clutch is disengaged. The present invention relates to the operating structure of a walk-behind rice transplanter configured to be able to switch to a fourth operating position in which the control valve is forcibly operated to the wheel lowering position when the planting clutch is disengaged.

The above-mentioned walk-behind rice transplanter can maintain a constant height of the machine relative to the rice field by automatically controlling the wheels to move up and down according to changes in the depth of the plow by switching the operating lever to the first operating position. can do the work,
In addition, by switching to the second operating position, automatic wheel elevation control can be performed even when turning the headland after planting has stopped, and the headland field can be leveled with the ground float. By switching to the third operating position, you can prevent the wheels from rising and lowering when the machine is stopped to replenish seedlings in the field, and by switching to the fourth operating position, you can raise and lower the machine to any desired height. It is a device that can be raised, and one at the rear of the aircraft.
It has the convenience of being able to easily obtain the above conditions using the operating lever of the book.

Conventionally, in this seed rice transplanter, for example,
- As shown in Publication No. 122914, the control valve and planting clutch are interlocked with the operating lever by two release wires passed near the seedling stand, and there are many other operating systems other than this operating system. Since release wires are often used to link the operated part of the operating system and the operating lever, the number of release wires that pass near the seedling stand increases.
In addition to making it difficult to secure the wires, lever operation tends to become difficult due to the sliding resistance of the release wires since two release wires are operated at the same time.

The purpose of this invention is to modify the device so that it can operate in the same way as the conventional one, while reducing the number of release wires that are passed through the vicinity of the seedling stand in order to link the control valve and planting clutch with the operation lever. There is a particular thing.

The characteristic structure of the present invention to achieve the above purpose is as follows:
In the operation structure of the above-mentioned walking type rice transplanter, an operating member is interlocked and connected to the operating lever via one release wire, and a swinging member is operated to bring the operating member of the control valve into contact with the wheel lowering position. and the operated member are interlocked and connected by an interlocking tool so that the control valve can operate over the entire stroke, and the operated member and the operating part of the planting clutch are interlocked and connected via a spring. At the point.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, two planting arms 4, 4 are arranged in parallel in the lateral direction of the aircraft at the rear of the self-propelled aircraft, which has a pair of left and right running wheels 1, 1, an engine 2, a control handle 3, etc. , a seedling stand 5 for supplying seedlings is attached to these, and one ground float 6 is attached to the lower part of the self-propelled body to constitute a walking type rice transplanter.

Each of the pair of transmission cases 7, 7 supporting the pair of wheels 1, 1 separately extends from the fuselage so as to be able to swing up and down about the axis The dynamic operation arms 7a, 7a are linked to a hydraulic cylinder 9 via a rod 8, etc., so that the left and right wheels 1, 1 can be raised and lowered relative to the aircraft by operating the cylinder 9. In front of the seedling stand 5, as shown in FIG. L-shaped second swing interlocking tool 13 and second push/pull rod 1
4. Consists of a connecting tool 15 slidably attached to the lower end of the second rod 14, and a spring 17 biased by pressing the connecting tool 15 against the lower end of a spring receiver 16 which also serves to prevent the connecting tool from coming off. A first mechanical interlocking mechanism 18 interlocks the front end of the float 6, which is configured to swing up and down relative to the aircraft, around a support shaft 19 at the rear end. The first interlocking tool 11 is configured to contact and transmit the wheel lowering side operation to the valve operating member 10a by means of a transmission portion 11a which is a bent portion toward the valve operating member 10a, and the valve operating member 10a is connected to the valve operating member 10a. Ascent position up
A spring 20 that biases the float 6 toward the valve 6 and downward is attached to the valve operating member 10a in such a manner that the biasing force can be adjusted by an operating lever 21. If the upward stroke of the float 6 is a small amount until the valve 10 reaches the stroke end, the connecting tool 15 and the second rod 14 should be raised together, and the upward stroke of the float 6 should be such that the upward stroke of the float 6 is such that the valve 10 reaches the stroke end. If the amount is larger than the amount of the second rod 14, the spring 1 is
An initial urging force of 7 is set.

In other words, the control valve 10 is in a state where the height of the grounding float 6 relative to the aircraft is maintained within the set range.
The control valve 10 and the float 6 are interlocked so that the control valve 10 and the float 6 are switched and operated by the spring 20 and the ground reaction force acting on the float 6, and the planting depth can be maintained almost regardless of changes in the depth of the tiller. It is designed so that you can work at a constant pace.

As shown in FIGS. 2 and 3, the first interlocking tool 11 is attached to the support shaft 22 of the first interlocking tool 11 with a bent portion 23a forming an operating section for the valve operating member 10a. A member 23 that is attached to allow relative swinging, a rod portion 24a connected to one end of the swinging member 23, and a rod portion 24a connected to the swinging member 23 at one end.
A band plate portion 2 connected to the other end of 4a in a relatively slidable manner
4b, this connecting tool 24
An operated member 26 having a U-shape in plan view is arranged in front of the seedling stand 5 in a state where it is pivotally connected to the seedling stand 5 via a pin 25, and a biased planting clutch 27 is placed in front of the seedling stand 5. a coil spring interlocking device 28 having one end connected to the swing operation portion 27a and the other end connected to the operated member 26 via the pin 25; one end connected to the operated member 26; death,
In addition, through a second mechanical interlocking mechanism 31 consisting of a release wire 29 whose other end is located behind the seedling stand 4 and an arcuate link 30 connected to the rear end of this wire 29. The valve operating member 10a and the planting clutch 27 are linked to an operating lever 32 arranged at the rear of the seedling stand 5. Then, when this operating lever 32 is swung along the guide groove of the lever guide 33 shown in FIG. 4 and set to the first operating position AUT ₁ , the planting clutch 27 is engaged, and the control valve 10 When set to the second operating position AUT ₂ , the planting clutch 27 is disengaged and the control valve 10 is automatically operated, and when set to the third operating position N, the planting clutch 27 is disengaged and the control valve 10 is automatically operated. , a state is obtained in which the planting clutch 27 is disengaged and the control valve 10 is locked in the neutral position, and when the fourth operating position is set to UP, the planting clutch 27 is disengaged and the control valve 10 is locked in the neutral position. 10 is in the wheel lowered position, and the switching operation between the operable state and the stopped state of the automobile wheel elevation control, the on/off operation of the planting clutch 27, and the artificial lowering operation of operation 1 are performed. Each of these operations can be performed using one operating lever 32.

That is, the operating lever 32 is in the first operating position.
When the release wire 29 is at AUT ₁ , as shown in FIGS. 2 and 3, the release wire 29 becomes loose and the operated member 26
is in the first position A, which is the most forward side, and the spring interlocking device 2
8 is pulled forward by the self-restoring force of the planting clutch 27, allowing the clutch operating portion 27a to return to the clutch engaged position ON, and the telescopic interlocking device 24 expands and contracts, and the rod portion 24a
Due to the action of the long hole 34, the valve operating member 10
This allows operation of the swinging member 23 by a. Then, the operating lever 32 is in the second operating position.
When set to AUT ₂ , the operated member 26 is pulled and moved from the first position A to the rear second position B, and the spring interlocking device 28 is pulled rearward and the first locking portion of the lever guide 33 is pulled. Lever 32 by 33a
Since it is fixed and held, the clutch operation section 27a is operated and maintained in the OFF position, and even if the band plate section 24b is pulled backward, the extension and contraction interlocking device 24 simply extends and the clutch operation section 27a is maintained. Hole 34
This operation allows the valve operating member 10a to operate the swinging member 23. Then, when the operating lever 32 is moved to the third operating position N, the operated member 26 is pulled and moved from the second position B to the rear third position C, and the spring interlocking device 28 is further pulled, but the elastic As the lever 32 is deformed and held in this extended state by being fixed by the second locking part 33b of the lever guide 33, the clutch operating part 29a is maintained in the cut position OFF, and the telescopic interlocking tool 24 is By locking the pin portion 23a of the swinging member 23 in the extended state, the valve operating member 10a is operated to the neutral position n, and the swinging member 23 is operated to the receiving and maintaining position, and the lever 32 is fixed. It is then held.
When the operating lever 32 is moved to the fourth operating position UP, the operated member 26 is pulled from the third position C to the rear fourth position D, and the spring interlocking device 28 is further pulled and elastically deformed. and maintains the clutch operating portion 27a in the cut position OFF,
When the telescopic interlocking device 24 is further pulled rearward in the extended state, the locking action of the tip of the rod portion 24a on the pin portion 23a moves the swinging member 23 to a position where the valve operating member 10a is operated to the wheel lowering position dn.
to operate.

In order to enable the biasing force of the spring 20 to be adjusted by the operating lever 21, the operating lever 21 is pivoted via a support shaft 36 to a bracket 35 fixed to the aircraft body, as shown in FIGS. 3 and 5. The spring 20 is movably pivotally connected and configured so that the end of the spring 20 can be adjusted by swinging the lever 21.
The bent portion 21a of the lever 21 is inserted into the bracket 35 through a plurality of notches 35 arranged in parallel as shown in FIG.
a... by inserting it into one of the brackets 35 and holding it in this locked state with the spring 37 to fix the lever 21.
The end of the spring 20 is configured to be fixed in the adjusted position.

As shown in FIG. 6, the front end of the float 6 is connected to an engine mounting frame 40 via a bracket 38 and a swing link 40. The abutment between the link 39 and the frame 40 sets the limit of lift while preventing damage to the float 6, and the abutment between the link 39 and the bracket 38 prevents the float 6 from being damaged. It is configured to determine a descending limit.

Note that 41 shown in FIG. 4 is a main clutch operating lever.

As explained above, according to the present invention, the single operating lever at the rear of the seedling stand can be switched from the first operating position to the fourth operating position to produce the same operating state as the conventional one. However, the number of release wires for manual operation of the control valve and planting clutch can be reduced to one, reducing the number of release wires passed near the seedling stand, making it easier to tie them down, and making it easier to tie the release wires. The wire resistance during operation has been reduced, making operation easier.

[Brief explanation of the drawing]

The drawings show an embodiment of the operating structure of the walking rice transplanter according to the present invention, and FIG. 1 is a side view of the walking rice transplanter;
Fig. 2 is a side view of the interlocking mechanism, Fig. 3 is a partially cutaway plan view of the interlocking mechanism, Fig. 4 is a plan view of the lever guide, Fig. 5 is a cross-sectional view of the operating lever mounting part, and Fig. 6 is a partially cutaway plan view of the interlocking mechanism. FIG. 3 is a partially cutaway side view of the float front end side connector. 5... Seedling stand, 6... Ground float, 10...
...Control valve, 10a... Valve operating member, 23... Swinging member, 24... Interlocking tool, 26...
...Operated member, 27... Planting clutch, 27a...
...Planting clutch operation section, 29...Release wire, 32...Operation lever, AUT ₁ ...1st operating position, AUT ₂ ...2nd operating position, N...3rd operating position, UP...4th Operation position, dn...Wheel lowering position.

Claims (1)

[Scope of utility model registration request] A control valve 10 for wheel elevation control linked to the grounding float 6 and the energized planting clutch 27 are linked by wire to one operating lever 32 provided at the rear of the seedling stand 5, and this operation The lever 32 is moved to the first operating position where the control valve 10 is automatically operated when the planting clutch is engaged.
AUT ₁ , a second operation position AUT ₂ where the control valve 10 is automatically operated when the planting clutch is disconnected, a third operation position N where the control valve 10 is neutrally locked when the planting clutch is disconnected, and a control position when the planting clutch is disconnected. Valve 10 is in wheel lower position
This is an operating structure of a walking rice transplanter configured to be able to be operated by switching to a fourth operating position UP which is forcibly operated in the dn direction, and in which an operated member 26 is interlocked and connected to the operating lever 32 via one release wire 29. An interlocking tool 24 is arranged so that the swinging member 23 for bringing the operating member 10a of the control valve 10 into contact with the wheel lowering position dn and the operated member 26 are flexibly operated so that the control valve 10 can be operated in its entire stroke.
The operating structure of the walk-behind rice transplanter is such that the operated member 26 and the operating portion 27a of the planting clutch 27 are interlocked and connected via a spring 28.