JPH0711541Y2 - Adjusting device for rolling control mechanism in paddy work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an adjusting device for a rolling control mechanism in a walk-type paddy working machine such as a rice transplanter, a fertilizer applicator, and a seeder.

[Problems to be Solved by Prior Art and Invention] Generally, in this type of paddy work machine, the sensing floats arranged on the left and right sides of the machine body sense the left and right rolling inclination of the machine body, and the switching valve is based on this. There is a so-called rolling control mechanism in which the body posture is made horizontal with respect to the rice field by controlling the switching. In such a configuration, the switching valve is configured to switch by the reciprocal motion of the spool with respect to the neutral position due to the left-right antisense swing of the sensing float. For this reason, with the spool in the neutral position, adjustment without deviation of the left and right sensing floats is an important point for accurate rolling control. However, in order to make this adjustment, it is necessary to check whether the spool is in the neutral position with the aircraft parallel to the left and right traveling aircraft, but actually check this state accurately. This is extremely difficult, requires advanced technology, and is virtually impossible to adjust at the user level, resulting in a problem of extremely poor workability.

[Means for Solving the Problem] The present invention has been made in view of the above circumstances and was devised for the purpose of providing an adjusting device for a rolling control mechanism in a paddy working machine capable of eliminating these drawbacks. In the paddy work machine equipped with a rolling control mechanism that switches the switching valve based on the rocking detection of the sensing floats arranged on the left and right to maintain the aircraft attitude horizontal to the rice field, It is characterized in that a gauge body that can freely set and release the spool to a neutral position is provided.

The present invention, with this configuration, makes it possible to perform adjustment work extremely easily even on the temporary user side.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling machine body of a walk-behind rice transplanter. The traveling machine body 1 includes an engine 2, a bumper 3 covering an outer peripheral portion of the engine 2, a seedling stand 4, a planting claw 5, a center float 6,
It is the same as that of the related art that it is configured by the device members such as the driving handle 7 and the traveling wheels 8.

Reference numeral 9 denotes a main cylinder provided in the machine body frame 1a, and a balance device 10 is swingably provided at a rear end portion of the main cylinder 9. The left and right ends of the balance device 10 are swing cases provided with traveling wheels 8 at their tips.
It is interlockingly connected to the base end of 12 through a connecting rod 11. On the other hand, the tip of the operating arm 10a protruding from the balance device 10 is engaged with a pin 12a protruding from a sub-cylinder 12 provided in the machine body frame 1a so as to be movable back and forth. The balance device 10 is configured to swing by lateral movement. When the main cylinder 9 is expanded and contracted, the balance device 10 moves back and forth in parallel while maintaining its left and right posture, whereby the left and right traveling wheels 8 simultaneously move up and down, while Cylinder 12
If the balance is moved to the left or right, the balance device 10 swings left and right,
As a result, the left and right traveling wheels 8 are constructed so as to move up and down in a contradictory manner.

Reference numeral 13 is a sub-valve (corresponding to a switching valve of the present invention) for operating the sub-cylinder 12, and the spool 13a of the sub-valve 13 has a pin shaft 2 on the body frame 1a side.
A plate 14c protruding from one side of a substantially U-shaped actuating arm 14 pivotally supported via a is connected via a pin shaft 13b. This operating arm 14 has an operating rod
14a is rotatably supported around the axis to form a balance mechanism, and the link 1 is provided at the end of each operation rod 14a.
The upper end of the sensing rod 15 is connected via 4b, and the lower end of the sensing rod 15 is interlockingly connected to the sensing floats 16 disposed on the left and right sides of the center float 6, respectively. If the sensing float 16 simultaneously swings up and down, the actuating rod 14a only rotates about the axis with respect to the actuating arm 14 and the actuating arm 14 does not swing and this actuation is absorbed. However, when the sensing float 16 makes an antisense swing due to the tilt of the airframe, the operating rod 14a swings together with the operating arm 14 with the pin shaft 2a as a fulcrum, which causes the spool 13a to move in and out. When the operation is performed, the sub-valve 13 is switched, the left-right operation of the sub-cylinder 12 is performed, and the rolling control is performed so that the aircraft is maintained and controlled to be in the parallel posture with respect to the rice field.

Reference numeral 17 denotes a gauge plate swingably supported by a pin shaft 13b for connecting the operating arm 14 and the spool 13a, and the gauge plate 17 is provided from the center of the pin shaft 13b which is the swing fulcrum. The distance A to the leading edge is set so as to correspond to the amount of protrusion of the spool 13a at the neutral position, thus forming a cage. Moreover, the gauge plate 17 is formed with a locking groove 17a and a locking hook 17b. And this locking hook 17b
, Is locked to the protruding locking pin 18a on the support plate 18 integrally provided on the spool 13a, the gauge plate 17 is oriented in the lateral direction to guarantee the free movement of the spool 13a. Remove the locking hook 17b from the locking pin 18a and remove the gauge plate.
When the gauge plate 17 is rotated to a vertical posture when it is rotated downward, and when the gauge plate 17 faces the upper surface of the sub-valve 13 with almost no gap (state of phantom line in FIG. 4), the spool 13
a is in the neutral state, and if there is a gap between the spool 13a and the sub-valve 13, or if it catches in the opposite direction and the vertical posture is not achieved, the spool 13a will be displaced from the exact neutral position. It is set so that it is determined to be present.
Moreover, when the gauge plate 17 moves downward in the vertical position, the locking groove
17a engages with a lock plate 13c provided on the sub-valve 13, so that the retracting movement of the spool 13a together with the gauge plate 17 is locked.

Further, in this structure, the bumper 3 that surrounds and protects the engine 2 is a large-sized one that also surrounds the outer circumference of the sensing float 16. With this bumper 3, the sensing float 16 swings. The fulcrum 16a and the side of the float are configured to be effectively protected not only in the sensing posture in which the pendulum 16a hangs downward, but also in the retracted posture in which the fulcrum 16a and the float hang downward.

In the embodiment of the present invention configured as described above, in the rolling control of the airframe, as described above, the actuating arm 14 swings due to the antisense swing of the left and right sensing floats 16 based on the tilt of the airframe. Thus, the spool 13a is moved up and down with respect to the neutral position to switch the sub-valve 13, and the sub-cylinder 12 is operated left and right to control the body posture to be parallel to the field. Although the paddy work is performed uniformly as described above, the neutral adjustment of the rolling sensing mechanism can be easily performed by using the gauge plate 17.

In other words, in this product, after the rolling control is activated with the machine placed on a flat surface, the locking hook 17b is locked by the locking pin 18a.
If the gauge plate 17 is moved downward, and the leading edge of the gauge plate 17 faces the upper surface of the sub-valve 13 with almost no gap, the gauge plate 17 becomes vertical and it is judged that the adjustment without deviation is performed. On the other hand, if there is a gap or, conversely, if the vertical posture is not reached, it can be judged that there is a deviation, and the gauge plate 17 is set to the vertical posture by adjusting the adjuster of the link 14b there. It is only necessary to make an adjustment, which allows even a provisional user to perform highly accurate rolling adjustment very easily.

In addition, when the gauge plate 17 is set in a vertical posture, the locking plate 13c locks the spool 13a so that the spool 13a is retracted and retracted, so that the rolling control is not performed. This is an abnormal state in which rolling control is not performed at all when the user has forgotten to release the work, which causes the operator to immediately judge that he / she has forgotten to release it and to actively promote the release. It prevents the trouble of working in a halfway state.

When the gauge plate 17 is set to the release position, the support plate 18 that supports the gauge plate 17 moves integrally with the spool 13a, so that the gauge plate 17 does not affect the spool operation.

Needless to say, the present invention is not limited to the above embodiment, and the gauge body may be provided not on the spool side but on the switching valve side. Absent. In this case, if the gauge body is set facing the pin shaft connecting the spool and the balance mechanism, for example, it is not necessary to separately provide a member for facing the gauge body on the spool side as in the above embodiment. .

[Advantages] In short, since the present invention is configured as described above, the neutral position adjustment of the rolling control mechanism depends on whether the spool is set to the neutral position by using the gauge body. It will be judged very easily,
And if it is judged that there is a deviation, it is sufficient to adjust the deviation with the gauge body as a reference, so that even with the provisional user side, it is possible to easily adjust the neutral position of the rolling control mechanism with high accuracy, The workability can be remarkably improved.

[Brief description of drawings]

The drawings show an embodiment of an adjusting device for a rolling control mechanism in a paddy field working machine according to the present invention.
The figure is a plan view of a walk-behind rice transplanter, and Fig. 2 is a side view of the same.
FIG. 4 is a front view of the spool portion of the sub valve, FIG. 4 is an enlarged view of an essential portion of FIG. 3, FIG. 5 is a plan view of the spool portion, FIG. 6 is an enlarged view of an essential portion of FIG. 5, and FIG. It is a schematic perspective view of the cylinder part in a rice transplanter. In the figure, 1 is a traveling machine body, 12 is a sub-cylinder, 13 is a sub-valve, 13a is a spool, 14 is an operating arm, 14a is an operating rod, 16 is a sensing float, and 17 is a gauge plate.

Claims (1)

[Scope of utility model registration request] 1. A paddy working machine comprising a rolling control mechanism for switching a switching valve on the basis of rocking detection of left and right sensing floats to maintain the body posture horizontal with respect to a rice field. An adjusting device for a rolling control mechanism in a paddy work machine, wherein the valve is provided with a gauge body for freely setting and releasing the spool to a neutral position.