JPS5939858Y2 - Rice transplanter with wheel lift control mechanism - Google Patents

Description

[Detailed description of the invention] This invention maintains the ground attitude of the aircraft constant or almost constant by controlling the propulsion wheels to move up and down in a direction opposite to the displacement direction of the sensor float in conjunction with the up and down displacement of the sensor float. The present invention relates to a rice transplanter equipped with a wheel lifting control mechanism for controlling the wheels, and a check mechanism that checks and prevents the wheel lifting control mechanism from operating in the wheel lowering control direction.

This type of rice transplanter with a wheel lift control mechanism is capable of planting by operating the restraining mechanism to the restraining/preventing position when the machine is stopped in the middle of the operation. Even when a large ground reaction force is applied, the wheel elevation control mechanism is maintained in a neutral state against this ground reaction force to prevent seedling collapse caused by unexpected downward control of the propulsion wheels. Although it has the advantage of being able to avoid this problem, it is necessary to operate the check mechanism from the check prevention state to the check release position in parallel with the engagement operation of the planting clutch lever at the start of planting work, This method of planting not only complicates the operation at the start of work, but also has the disadvantage that if the user forgets to perform the operation, the wheel elevation control mechanism may not perform the intended elevation control.

As a measure to eliminate such inconvenience, the check mechanism is interlocked so that when the planting clutch lever is engaged, it is in the check release position, and when the planting clutch lever is turned off, it is in the check prevention position. It is considered that the

However, with this type of rice transplanter equipped with a wheel lift control mechanism, the height of the machine from the ground must When it becomes necessary to raise the planting height higher than the height above the ground during work, the planting clutch lever is also engaged and operated in conjunction with the operation of the check mechanism to the check release position. There is a danger that it will operate.

In view of the above-mentioned circumstances, this invention enables planting to be performed rationally and reliably at the start of work without forgetting any operations, while at the same time making it possible to perform planting operations when necessary after the aircraft has stopped. The height of the aircraft can be adjusted safely and easily, and the system is officially registered, and includes a check mechanism that checks and prevents the wheel lift control mechanism from operating in the wheel lowering control direction. It is characterized in that it is provided so as to be able to independently operate the restraining prevention and restraining release, and is also provided with an interlocking mechanism that operates the restraining mechanism so that it is always in the restraining release position when the planting clutch lever is engaged and operated. do.

That is, according to the present invention, the restraint mechanism can be automatically operated to the restraint release position by simply engaging and operating the planting clutch lever at the start of planting work, so that the planting can be performed as described above. There is no need to operate the check mechanism to the check release position in parallel with the engagement operation of the attached clutch lever,
Such planting allows operations at the start of work to be performed rationally and reliably without forgetting operations.

Moreover, when the planting clutch lever is in the clutch disengaged position, the restraint mechanism can be independently operated to prevent or release the restraint. Even if it becomes necessary to raise the machine higher than the height above the ground during planting work, such as when supplying spare seedlings from a high ridge, 1. During planting, the clutch is not activated unexpectedly, making it possible to safely and easily adjust the height of the aircraft after it has stopped.

Embodiments of the present invention will be described below based on the drawings.

The drawing shows a main frame 3 that also serves as a transmission case extending rearward from a mission case 2 that is directly connected to an engine 1.
For planting seedlings, the device 4 is installed in series, and one device is installed at the front and back positions between the propulsion wheels 6, 6 attached to the pair of left and right rocking cases 5, 5 extending rearward from both sides of the mission case 2. sensor float 7 and a pair of left and right side floats 8,
8 is arranged so as to be able to swing vertically, and the left and right propulsion wheels 6°6 are moved in conjunction with the vertical displacement of the sensor float 7 as the depth of the plow changes. A wheel elevation control mechanism 9 for maintaining the ground attitude of the aircraft constant or almost constant by controlling elevation in a direction opposite to the direction of change of the sensor float 7, and operation of the wheel elevation control mechanism 9 in the wheel descending control direction. A mechanism 10 is provided for restraining and preventing the seedlings, and the restraining mechanism 10 is configured to be capable of independently restraining and releasing the restraint; When a planting clutch lever 13 provided on a control handle 12 extending upwardly through the lower side of the stand 11 is engaged, a linkage mechanism 14 is provided which always operates the planting clutch lever 13 to be in the restraint release position.

The wheel elevation control mechanism 9 is constructed as follows.

That is, the swing cases 5 of the propulsion wheels 6, 6 are attached to both ends of an arm 17 that is swingable around the vertical axis and is attached to a hydraulic cylinder 16 that is telescopically operated by a foreign valve provided in the pump unit 15. , 5 is pivotally connected to the operating rod 18.
．． 18, and the valve switching rod 19 extending from the pump unit 15 is pivotally connected to the transmission case 2 side. A first sensing rod 21 is pivotally connected to the other end of the automatic adjustment arm 20, and a second sensing rod 2 is provided on the sensor float 7.
2 are interlocked via the sensor spring 23, so that the valve switching rod 19 is moved from the neutral position to the wheel lowering operation position or from the neutral position to the wheel raising operation position in conjunction with the vertical displacement of the sensor float 7 above a certain level. By shifting, the left and right propulsion wheels 6, 6 are controlled to move up and down in a direction opposite to the displacement direction of the sensor float 7.

Further, the steering handle 12 is provided with an operating lever 24 for forcibly operating the wheel elevation control mechanism 9 in the wheel lowering control direction by manual operation.

The check mechanism 10 has a tank bottom as follows.

That is, a restraint pin 25 is provided at the free end of the automatic adjustment arm 20 of the wheel elevation control mechanism 9, and a portion of the main frame 3 near the restraint pin 25 is fitted and engaged with the restraint pin 25 from above to raise and lower the wheels. A check arm 26 having a cutout groove 26a for preventing the control mechanism 9 from moving in the downward direction of the wheel is pivotally mounted around a horizontal axis, and the check arm 26 and the control arm 26 are pivotably mounted around a horizontal axis. A check operation lever 27 provided on the handle 12 is interlocked and connected via an operation wire 28, so that by swinging the check operation lever 27, the check arm 26 is brought into the check release state and the check prevention state. □Switch to the state and the bottom of the tank should be reached.

The linkage mechanism 14 has a tank bottom as follows.

That is, the control operation lever 27 is attached to the planting clutch lever 13.
A pin 30 protruding from the swing operation path is provided, and
'The check operation lever 27 is moved to the check release operation position A (which is also the clutch engagement position C of the planting clutch lever 13) relative to the pin 30.

) side, so that the planted clutch lever 13
is in the clutch disengaged position 2, the check operation lever 27 is configured to be operable independently to the check release operation position A or the check prevention operation position opening, and the planting clutch lever 13 is moved from the clutch disengage position C to the clutch disengagement position C. When operated to the entry position 2, the check operation lever 27 is configured to be moved to the check release operation position A.

[Brief Description of the Drawings] The drawings illustrate an embodiment of the rice transplanter with a wheel lift control mechanism according to the present invention, and Fig. 1 is an overall side view, and Fig. 2 is an enlarged partially cutaway side view of the main parts. be. 6...Propulsion wheel, 7...Sensor float, 9...Wheel elevation control mechanism, 10...
... Check mechanism, 13 ... Planted clutch lever - 1
14... Linkage mechanism.

Claims (1)

[Scope of utility model registration request] In conjunction with the vertical displacement of the sensor float 7, the propulsion wheel 6
In the rice transplanter, the rice transplanter is equipped with a wheel elevation control mechanism 9 for controlling the elevation of the machine in a direction opposite to the displacement direction of the sensor float 7 to keep the posture of the machine body constant or almost constant. A check mechanism 10 that checks and prevents the operation in the descending control direction is provided so as to be able to operate independently to prevent and release the check, and when the planting clutch lever 13 is engaged, the check mechanism 10 is always released. A rice transplanter with a wheel lifting/lowering control mechanism, characterized in that it is provided with an interlocking mechanism 14 for operating the rice transplanter in a desired position.