JPS59192012A - Rice transplanter float constant pressure control device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a rice transplanter comprising a vehicle body supported by wheels, and a seedling transplanting device mounted on a vehicle body so as to be movable up and down relative to the wheels.
This invention relates to a device that controls the ground pressure of a float on a field surface in an incense seedling planting device to be substantially constant.

When the ground pressure of the float relative to the field changes, the height of the seedling planting device relative to the field changes, causing the seedlings to be planted shallowly or deeply. By utilizing the fact that the height between the float and the seedling planting device changes depending on the ground pressure of the float against the surface, the seedling planting device can be raised and lowered with respect to the wheels according to the height of the float and the seedling planting device. The ground pressure of the float is automatically controlled to be substantially constant by raising and lowering the lifting mechanism. In addition, recent IJu planters are equipped with means for adjusting the sensitivity of the float constant pressure control according to the field conditions, and means for adjusting the planting depth of seedlings in the field.

In this case, the sensitivity adjustment means and the depth m'j means for seedling planting are in a relationship such that the sensitivity of the seedling planting does not change due to depth adjustment, but they must be operated separately. Therefore, when the sensitivity is adjusted to the A side, the seedling planting depth can be adjusted to a shallower depth, or when the sensitivity is adjusted to the duller side, the seedling planting depth can be adjusted to a shallower depth. It may be adjusted to make it deeper.

In the former case, the raising and lowering of the seedling planting device is done sharply when the seedlings are planted shallowly, which tends to cause floating seedlings that cannot be pushed into the field; In this condition, the raising and lowering of the seedling planting device was slow, and mud pushing by the float was likely to occur.

The present invention provides a float constant pressure control device 7 equipped with a sensitivity adjustment means and a seedling planting depth adjustment means such that when the seedling planting depth adjustment means is operated in the direction of shallow planting, the sensitivity becomes dull. By being related, the above-mentioned tool combination is resolved.

Below, we will explain the drawings of an embodiment in which the present invention is applied to a portable riding rice transplanter. In the drawing, (1) shows a running vehicle body supported by two front wheels (2) and two rear wheels (3). ,(
4) shows a seedling planting device in which a link mechanism (5) is attached to the top and bottom of the vehicle body (1), and the seedling planting device (4) runs with the link mechanism (5). It is raised by a single U1 type hydraulic cylinder (6) installed between it and the vehicle body (1).

The seedling planting device (4) is the link machine! :a (5)
+ Transmission case (7) installed against the transmission case (7)
) and a transmission case (7) that is attached to the top of the seedling stand (8).
It consists of a vertically swinging seedling planting mechanism (9) that is attached to the rear side plate, and a float (11) that is grounded on the field (10) is installed at the bottom of the transmission case (7). .

The -L end of a seedling planting depth adjustment link 0 extending diagonally downward toward the rear is pivoted to the front lower surface of the transmission case (7) so that the link 0 can freely move below -L. The bottom %i + of (2) means that the pivot bracket 04) that can be attached to the upper surface of the float 0]) is pivoted to the bin 00 so that the front part of the float 0]) can freely move up and down. Link 02) from its upper end along the back side of the seedling stand (8) to the vehicle body (1) side C
and the extended lever (by moving up and down at 10,
Flow) Move the pivot pin (1) (11) up and down,
21. Constructed to change and adjust the planting depth of the fungus. ing. In addition, the matrix . . . in the figure is a locking plate for locking the lever 00 at a predetermined rotational position.

A 3-position hydraulic switching valve 0Q is provided in the hydraulic switch (6) and hydraulic circuit α8) for raising and lowering the seedling planting device (4), while a transmission case (7) of the seedling planting device (4) is provided. ) has a support link (1 [) extending in the front direction pivoted with a pin so that it can move up and down, and the rear end of the support link 01) and the seedling planting depth adjustment link α■ are connected to the seedling planting depth. When the adjustment link 0z moves two times, the support link C3 moves in conjunction with this.
1) are interlocked and connected via the rod (21) so that they can rotate ten times, and a pin (A) is attached to the top surface of the 011 section of the float (11).
The central part of the pivoted sensor link (a) and the support link 6) 1) are connected via an interlocking link (incorporated), and the hydraulic switching valve (spool a1j and float 01) When the float OD is at a predetermined height Jjl-1 with respect to the seedling planting device (4), the hydraulic switching valve (]9) connects the front part of the sensor link (C) with the base of the sensor link (C).
When the float 0η rises, the switching valve α9) moves the hydraulic pressure in and out of the hydraulic cylinder (6).
) is in the raised position to supply hydraulic pressure to the float 01')
When lowered, the switching valve is connected via the wire (a) so that it is in the lowered position where the hydraulic pressure of the hydraulic cylinder (6) is released.

Then, a sensitivity adjustment lever (c) is provided on the traveling vehicle body (1), and the lever (2) gold and the upper end of the sensor link (a) are connected to a wire (i) with a spring (c). )
When the lever Q6) is rotated in the forward direction, the flow 1 due to the spring (A) in the middle of the wire (A)
- The downward biasing force of (II) increases, and when the lever (c) is rotated backward, the spring (c) in the middle of the wire (c)
Flow 1-(11) due to two forces is configured so that the downward biasing force is reduced. On the other hand, the sensor link (11Ti) is
c) between the upper end and the seedling planting depth adjustment link α2 using a spring (
A) When the seedling planting depth adjustment link 0■ is rotated downward, the downward urging force of the float (1) by the spring (A) in the middle of the wire (to) increases. However, when the seedling planting depth adjustment link 0 rotates upward, the downward biasing force of the float due to the spring wire is reduced.

In this configuration, the seedling planting device (4) is connected to its flow I/O
D descends to touch the field (10), and the traveling vehicle body (
1) The seedling planting device i'? Flow 1□ of the seedling planting device (4) during the planting operation by driving (4) 1-■
(1, 1) When the height between the front part and the transmission case (7) is a predetermined height, and the ground pressure of the float (+1) with respect to the field is a predetermined value, a wire (
The switching valve (19) interlocked with the flow 1-(II) is in the neutral position and the seedling planting device (4) does not move up or down
) increases and the 011 part of the float (11) increases.
2 promotion Io λ1. In conjunction with this, the switching valve α0 is switched to raise the seedling planting device, and the seedling planting device (4) is raised so that the ground pressure of the float is lowered. When the value returns to the value, the switching valve (1 < υ is the neutral position 1; switch to q), and the seedling planting device (4) stops rising.

If the ground pressure of the float decreases and the float (II) does not move downward, the switching valve (1) will move in conjunction with this.
When α switches to lowering the seedling planting device, the seedling planting device (4) is lowered so that the ground pressure of the float increases, and when the ground pressure of the float returns to a predetermined value with this descent, the switch is switched. When the valve (1g) is switched to the neutral position, the lowering of the i'i1j planting device (4) is stopped, and as a result, the ground pressure of the float with respect to the field can be controlled in a substantially constant direction.

During this rice planting work, as the sensitivity adjustment lever (36) is rotated forward, the downward biasing force of the float (+1) by the spring (C) in the middle of the wire (C) increases, causing the float (01) to Since the resistance to the upward movement increases, the seedling planting f;ζt(4
) The sensitivity of the rise is dull, and when you rotate the sensitivity adjustment lever backwards, the spring! Flow 1- according to 27)
The downward biasing force of (11') decreases and the float (11')
The sensitivity of the chalk 1 control can be freely adjusted so that the sensitivity of the upper y1 of the seedling planting device (4) to the upward movement of the float (1) becomes sharper because the resistance to the upward movement of the float (1) becomes smaller. 'I can do it, +'M <rli ('J deep; it'j clause'J:, / 'y Q2+ all downward) twice! T'II ortho7Ill-toQ])it transmission key-y-(7) Color pHB ic 7 B; rl H
, surface (1(j 1′?j planting depth is shallower, and 1°1′i planting depth J1~J ijj 'I
2 times h 2 times 1fl Jl t Ruto'7
0-1- (IT') approaches the transmission case (7) and the field scene (1 Freely adjust depth Wl, I
＋I I can do it, so I can do it.

Such sensitivity and seedlings (11 +. 1 i 4 depth: ('
At the time of Mf, &I, the fungal inoculation was left at its depth (
・If the third degree is sharpened, l′I for the upward movement of the float
'r 4'i'l: Lu position (4) rises instantaneously. Therefore, the planting of the fungus on the ji1'tl field Ini will temporarily become shallower and floating 1'1"1 will occur, and the seedling planting will become deeper and the sensitivity will become duller. Then, the rising movement of the float causes a delay in the rising of the seedling planting device (4), which causes mud to be pushed onto the field by the float. Adjustment lick 09 and sensor link (
A) is connected via a wire with a spring handle (1), and when the seedling planting depth adjustment link α4 is rotated downward to shallowly plant, the spring (with) in the middle of the wire [with]
The downward biasing force of the float increases due to e), and the sensitivity of the seedling planting device to the upward movement of the float becomes less sensitive. The sensitivity of the automatic control of the seedling planting device is increased, as the downward force of the float due to the splash wire in the middle of the wire (1) is reduced, and the sensitivity of the raising of the seedling planting device to the upward movement of the float is sharpened. The seedling planting depth is automatically changed according to the adjustment of the depth.

Although the above embodiment shows the case where it is applied to a riding type rice transplanter, the present invention is not limited to this, and the seedling planting device is attached to the traveling vehicle body so that it cannot move up and down, while the wheels on the traveling vehicle body are mounted on floats. From the fact that it moves up and down according to the up and down movement,
Needless to say, the present invention can also be applied to a rice transplanter in which the seedling planting device is moved up and down relative to the field.

As described above, the present invention provides seedlings 4i for wheels on a vehicle body.
(1) means for adjusting the seedling planting depth by adjusting the pivot point of the float in the night planting device; In the rice transplanter, the rice transplanter is provided with a force associated with the lifting mechanism to raise and lower the lifting mechanism according to the vertical movement of the flow and a float, and a means for adjusting the sensitivity of the lifting mechanism to the float. By adjusting the sensitivity and adjusting the depth of seedling planting, it is possible to reliably prevent floating seedlings from starting or being pushed by the mud by the float. has.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of a riding prefectural rice transplanter, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is an enlarged view of the main parts of FIG. 1. (1'l...running vehicle body, (2)(3)...wheels, (
4)...Seedling planting device-0])...Float, (6)...
・Hydraulic cylinder, (19) ・Switching valve, 0...
・Depth adjustment link with seedling Uti, (A)...Sensor link, (4)...Sensitivity adjustment lever, (C) (C) (
7)...wire, (a) (a)...spring.

Claims (1)

[Claims] (1) comprising a lifting mechanism for raising and lowering a seedling planting device relative to wheels on a vehicle body; and means for adjusting the seedling planting depth by vertically adjusting a pivot point of a float in the seedling planting device; ``J0 In a rice transplanter, the lifting mechanism and the float are related to each other so that the lifting mechanism moves up and down according to the vertical movement of the float, and the rice transplanter is provided with a sensitivity adjustment means for the lifting and lowering operation of the lifting mechanism with respect to the float, 1. A float constant pressure control device for a rice transplanter, characterized in that the planting depth adjusting means and the sensitivity adjusting means are related to each other so that the sensitivity is low when planting shallowly, and the sensitivity is sharp when planting deep.