JPH066010B2 - Riding rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a riding type equipped with an automatic lifting control means for lifting and lowering the seedling planting device so that the seedling planting device maintains a set height above the rice field. Regarding rice transplanters.

[Conventional technology]

The current rice transplanter is a type of planting one row with one set of planting arms, but in recent years, in response to a request to improve the efficiency of planting work, two rows of planting arms are used to plant one row. A type of riding type rice transplanter is appearing that enables the planting traveling speed to be increased.

As mentioned above, when the planting traveling speed becomes faster, the mud pushing phenomenon and ripple phenomenon due to the float that was provided for maintaining the posture of the seedling planting device become prominent, and there is a risk of adversely affecting existing seedlings. ing. In view of this, a riding type rice transplanter of the type that does not include the float has been proposed in such a riding type rice transplanter designed to increase the traveling speed with planting.

[Problems to be Solved by the Invention]

In the riding type rice transplanter, the seedling planting device is moved up and down with respect to the machine to control the raising and lowering to maintain a constant seedling planting depth. Since the planting device floats above the rice field and is supported only by the airframe, every time the planting device is operated up and down by the lifting control, the planting device becomes It was easy to overshoot, and there was a tendency to vibrate near the target position without stopping quickly at the target position.

Here, the present invention focuses on the above-mentioned problems, and an object thereof is to prevent the above-mentioned vibration phenomenon of the seedling planting device during the raising and lowering control operation.

[Means for Solving the Problems]

The feature of the present invention is that in the riding type rice transplanter as described above, the seedling planting device is connected to the traveling machine body through the elevating mechanism so that the raising and lowering operation can be freely performed, so that the seedling planting device maintains the set height from the paddy field. It is equipped with an automatic raising / lowering control means for raising and lowering the seedling planting device by a lifting mechanism, and a grooving device for digging a fertilizing groove on the rice field is provided in the seedling planting device, and the grooving device rushed into the rice field The seedling planting device is configured to be supported at a set height with respect to the rice field by the supporting force and the supporting force of the elevating mechanism against the body, and its action and effect are as follows.

[Action]

When the grooving device is placed in the rice field as described above, if the seedling planting device is moved up and down and vibrates up and down, the grooving device also vibrates together in the rice field. In this case, the mud inside the paddy field acts on the grooving device to suppress the vibration phenomenon of the seedling planting device. Further, since the grooving device is generally narrow, there is little phenomenon such as mud pushing even when the airframe runs at high speed.

〔The invention's effect〕

Passenger-type rice transplanters often have a fertilizer application that digs a groove near the planted seedlings and feeds fertilizer into this groove. By effectively utilizing the fact that the going groover has the function of a damper that absorbs vibrations, it is possible to suppress vibrations without the phenomenon of mud pushing, etc. Elevating control of the model rice transplanter will be performed smoothly.

〔Example〕

Hereinafter, a riding type rice transplanter which is an embodiment of the present invention will be described with reference to the drawings.

As shown in Fig. 1, the horizontal axis of the rear part of the planting mission (1)
A planting case (2) that is driven to rotate around (P ₁ ) is provided,
Two sets of planting arms (3) are provided at both ends of this planting case (2), and a seedling stand (4) which is slidably driven in the left and right direction is provided above the planting mission (1). The seedling planting device (A) is configured so that the planting arms (3) alternately cut out the seedlings from the seedling stand (4) and plant them in the field.

This seedling planting device (A) is equipped with a fertilizer applying device (B) as shown in the same figure. This fertilizer applicator (B) is a fertilizer storage tank (6), and a feeding section for intermittently feeding the fertilizer in the tank (6).
(7), a plate-shaped grooving plate (8) fixed to the lower part of the planting mission (1) and protrudingly arranged in the paddy field, and a grooving device (9) as if the plate material was bent in a U shape in plan view. , Is composed of a hose (10), etc. that are installed over the feeding section (7) and the grooving device (9), and along with the traveling of the machine, the grooving plate (8) and the grooving device (9) Dig a groove in the vicinity of the planted seedlings with, and put out the feeding part (7) in this groove.
The fertilizer fed out from is sent in.

On the other hand, a first quadruple link mechanism (12) that can be moved up and down by an elevating cylinder as a single-acting elevating mechanism (11) is extended from the machine body side. 2) Quad link mechanism (14) with suspension spring (13)
And the seedling planting device (A) is rotatably connected around the front and rear axis (P ₂ ) at the rear end of the second quadruple link mechanism (14). ) A double-acting low rig cylinder (16) is installed over the rear end upper part and the support rail (15) on the rear surface of the seedling stand (4). Also, this seedling planting device (A) does not have a float, so the seedling planting device
(A) is arranged close to the rear wheel (5) so that it is located immediately after it.

The paddy field is in a state where a water layer (S) is formed on the mud surface (G) having a hardness suitable for planting seedlings. The lifting control and rolling control for keeping (A) at the set height and making the seedling planting device (A) parallel to the mud surface (G) will be described in detail as shown in FIGS. 1 and 2. A support shaft (17) is installed on the front and left of the planting mission (1) in the left and right direction, and mud surface sensors (18), () that follow the ground contact with the mud surface (G) at both ends of this support shaft (17). 19) is provided. The mud surface sensors (18) and (19) are composed of narrow plate-shaped arm portions (18a) and (19a) and flat plate-shaped ground portions (18b) and (19b), respectively, and support the support shaft (17). The light-emitting diode (21) is mounted so as to be freely swingable around the horizontal axis (P ₃ ), is biased downward by a spiral spring (20), and is equipped with a light-emitting diode (21).

On the other hand, the support shaft (17) has three pairs of left and right photodiodes (22R), (22L), (23R), (23L), (24R) and (24L) which are the mud level sensors (18) and (19). ) Is arranged so as to oppose the light emitting diode (21), and each photodiode (22R), ...,
The light receiving signal from (24L) is input to the control device (25). With the above configuration, the control device (25) is provided with the lifting and lowering cylinders (1
The control valves (26) and (27) for 1) and (16) are operated to raise and lower and roll the seedling planting device (A), which causes the seedling planting device (A) to move. It is maintained at a set height above the mud level (G) and is kept parallel to the mud level (G).

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of a riding-type rice transplanter according to the present invention.
The figure is an overall side view of the seedling planting apparatus, and FIG. 2 is an overall perspective view of the mud level sensor and a view showing the elevation / rolling control system. (9) …… Groover, (11) …… Lifting mechanism, (A) …… Seedling planting device.

Claims (1)

[Claims] 1. A raising / lowering mechanism (11) for mounting a seedling planting device (A) on a traveling machine body.
A lifting mechanism (11) automatically lifts and lowers the seedling planting device (A) so that the seedling planting device (A) maintains a set height above the rice field. Along with the provision of a fertilizer grooving device (9) for digging a field on the rice field, the seedling planting device (A) is provided, and the supporting force for the rice field of the grooving device (9) rushed into the rice field and the lifting mechanism ( A riding-type rice transplanter configured to support the seedling planting device (A) at a set height with respect to the rice field by the support force against the airframe of 11).