JPS63148917A - Mud hardness detector of paddy field working machine - 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 [Industrial Application Field] The present invention relates to a paddy field working machine such as a rice transplanter, and particularly to a structure for detecting the hardness of mud in a paddy field.

[Conventional technology]

Rice transplanters, etc., perform elevation control to maintain a constant planting depth of seedlings regardless of the unevenness of the tiller. This elevation control is performed by detecting the mud surface position and maintaining the height of the aircraft or seedling planting device from the mud surface at a constant level. Studies have been conducted to incorporate changes in height into the above-mentioned elevation control to provide even more precise and highly functional elevation control.

An example of the configuration of the mud hardness detection described above is disclosed in Japanese Patent Application Laid-open No. 58-4000.
It is disclosed in Publication No. 5. This has a structure in which a rod-shaped mud hardness sensor that is biased toward the downward swinging side is inserted into the rice field.

[Problem that the invention seeks to solve]

The above-mentioned configuration detects mud hardness based on the magnitude of the reaction force from the mud that tries to push the mud hardness sensor upward, as well as the magnitude of the resistance from the mud that acts on the mud hardness sensor during driving. , Since there is straw waste etc. scattered in the rice fields, if you drive with a stick-shaped object like a mud hardness sensor entering the rice field, the straw waste will inevitably get entangled with the mud hardness sensor. I end up.

If straw debris gets entangled with the mud hardness sensor, the mud hardness sensor will no longer be able to operate properly, which will have a negative impact on lift control.

The present invention focuses on the above-mentioned points and aims to provide a structure for detecting mud hardness to which straw debris is difficult to adhere.

[Means for solving problems]

The feature of the present invention is that the mud hardness detection device for a paddy field working machine is composed of a rotating body that is plunged into the rice field and driven to rotate, and a means for measuring the rotational resistance acting on the rotating body. , its functions and effects are as follows.

[For production]

When we say that paddy mud is hard, it means that it has little moisture and high viscosity. Therefore, the hardness or softness of paddy mud is detected as rotational resistance acting on the rotating body based on the viscosity of the mud. Even if straw waste gets caught in the rotating body while the vehicle is running, the rotating action of the rotating body causes the straw waste to be swung around in the direction of rotation and flow backwards.

〔Effect of the invention〕

As described above, it has become possible to detect the mud hardness of paddy fields while avoiding as much as possible the adhesion of straw debris to the rotating body of the mud hardness sensor during seedling planting work, and the mud hardness detection operation is now possible. It is now possible to prevent the adverse effects on elevation control due to defects.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, a remote-controlled rice transplanter which is one of the embodiments of the present invention will be described based on the drawings.

As shown in Fig. 3, a seedling planting device (7) can be raised and lowered via a link mechanism (4) at the rear of a traveling body (3) equipped with an engine (1) and a transmission case (2). The front wheels (5) and rear wheels (5) are connected to the
6) supports the traveling body (3). The traveling aircraft (3) includes a receiving device (8) that receives signals from a transmitting device (not shown), and a control device that receives output signals from this receiving device (8) and outputs operation signals to various actuators. (9) constitutes a remote-controlled rice transplanter.

Then, as shown in Figures 2 and 3, the traveling aircraft (3)
Frames (11) extend left and right from the front and rear of the frame, and each frame (11) is provided with a disc-shaped index portion (12) at its tip end containing a lamp. Seedlings can be planted along the already planted seedlings (W) by remote control while visually observing so that the indicator part (work 2) on one side passes over the already planted seedlings (W). Further, the indicator part (12) is linked to the control parts of the front and rear wheels (5) and (6) via a link (22), and is arranged according to the direction of the front wheel (5) or the rear wheel (6). The indicator portion (12) is also configured to change direction in the same way, so that the direction of the front and rear wheels (5) and (6) can be easily checked.

Furthermore, an ultrasonic sensor (13) for detecting obstacles such as ridges is attached to the front part of the traveling body (3) so as to be able to change its direction vertically. There are also ultrasonic sensors (14) at the front and bottom of the traveling aircraft (3) that detect the height from the mud surface.
(14), and this ultrasonic sensor (14)
(14) detects the inclination of the aircraft forward and backward, automatically changes the vertical direction of the ultrasonic sensor (13), and constantly detects obstacles on the mud surface at a set distance from the traveling aircraft (3) for maneuvering. The system is configured to warn the user.

Next, to explain in detail the lifting control of the seedling planting device (7) and the detection of mud hardness, the bottom of the seedling planting device (7) has a flow for detecting the mud surface and leveling the soil. Planting device (7
), and based on the vertical movement of this float (10), the seedling planting device (7) maintains the set height above the mud surface. ) is operated up and down.

On the other hand, as shown in FIGS. 1 and 3, a pair of link mechanisms (15) are provided on the lower surface of the front of the fuselage to allow free vertical movement in parallel.
In addition, a grounding float (16) biased downward by a spring (23) is provided, and the grounding float (16) is biased downward by a spring (23).
16) Rotating body as a mud hardness sensor from the bottom (17)
has been placed in the group. In addition, a ground float (
16) A motor (1) that rotationally drives the rotating body (17) is mounted on the top surface.
8) and a rotation speed detection sensor (19) for detecting the rotation speed of the motor (18).

The motor (18) is provided with an automatic variable power supply (20) that operates the voltage to maintain the rotation speed of the motor (18) at a set rotation speed based on the signal from the rotation speed detection sensor (19). A voltmeter (21) is provided to measure the voltage applied to the motor (18). and,
The increase in voltage from the voltage required to rotate the rotating body (17) at a set rotation speed in the air is detected as the mud hardness.

This mud hardness detection is taken into account in the lifting control, and when the mud is hard, the lifting sensitivity is switched to the insensitive side, and when the mud is soft, the lifting sensitivity is switched to the sensitive side.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not intended to be construed as an original text based on the structure of the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the mud hardness detection device for a paddy field working machine according to the present invention, in which Fig. 1 is a side view of the grounding float and the surroundings of the rotating body, Fig. 2 is an overall plan view of the rice transplanter, and Fig. 3 is a side view of the area around the grounding float and the rotating body. It is an overall side view of a rice transplanter. (17)...Rotating body, (2I)...Means for detecting rotational resistance.

Claims (1)

[Claims] A rotating body (17) that is plunged into the rice field and driven to rotate, and a means for measuring rotational resistance acting on the rotating body (17).
21) A mud hardness detection device for a paddy field working machine.