JPS643331Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a rice transplanter. Specifically, the invention is a rice transplanter. Specifically, the rice transplanter is designed to prevent excessive sinking of the float, which induces mud pushing on the float, which causes the planted seedlings to be disturbed, fall over, or move. When adjusting the ground pressure of the float, in order to easily, reliably, accurately, or automatically adjust the ground pressure, we detect hard soil (mud) that serves as a guide to the amount of float sinking. The present invention relates to a rice transplanter equipped with a sensor, specifically a soil hardness detection sensor that penetrates into the soil and moves.

Fields are often littered with foreign objects such as straw and grass, but in conventional rice transplanters equipped with sensors, the part of the sensor that penetrates into the soil increases the running resistance of the machine due to its movement into the soil, and causes dirt to push through the soil. Since the sensor is configured in a bar shape with a small width, it is easy for the sensor to get caught in the foreign matter, and as a result of the foreign matter getting caught in the sensor, the resistance of the sensor to move through the soil is reduced. Just as the sensor would operate in the same way as when the soil increases and becomes hard, the sensor's detection operation becomes uncertain and inaccurate due to foreign matter scattered in the field, and as a result,
In particular, when the ground pressure of the float is automatically adjusted based on the detection results of the sensor, the provision of the sensor has the disadvantage that it can actually reduce the planting performance.

In view of these points, the present invention prevents malfunction of the sensor due to contaminants getting caught in the sensor by a simple structural modification to the sensor, and at the same time prevents the sensor from malfunctioning when the float ground pressure is properly adjusted. The aim is to ensure reliable and good planting work.

The rice transplanter according to the present invention is as follows:
The sensor is characterized in that the part that penetrates into the soil is constituted by a rotary body that is rotatable around a horizontal axis.

In other words, by configuring the part of the sensor that penetrates into the soil as a rotating body such as an idle wheel or drive wheel that rolls while touching the ground as the aircraft travels, the rotating body can be made to have a small width like a rod-shaped body. Although the mud pushing and increase in running resistance due to this rotating body are suppressed as much as possible, if the rotating body gets caught with foreign matter such as straw or grass scattered in the field, the rotating body will be damaged. With rotational action,
By pushing the stuck foreign matter into the soil, it is possible to automatically release the foreign matter from the rotating body, regardless of the foreign matter scattered in the field. This eliminates sensor malfunctions and allows the sensor to reliably and accurately detect soil hardness.This allows the float to properly ground itself without sinking excessively, allowing for the desired planting. I was able to perform the work well.

Hereinafter, an embodiment of the present invention will be described based on the drawings.A plurality of floats 2, which can swing up and down with a position near the rear end as a fulcrum, are installed at appropriate intervals in the lateral direction at the rear of the passenger vehicle 1. A riding rice transplanter in which an equipped multi-row planting device 3 is connected in a manner that can be raised and lowered via a link mechanism 4, and is provided with a hydraulic cylinder 5 that drives the planting device 3 to raise and lower it.
A spring 6 is provided to swing and bias one of the floats 2 downward, so that the float 2 swings up and down with respect to the frame 7 of the planting device 3 as the ground pressure changes. Configure.

In addition, a bent link 8 is interposed between the front end of the biasing float 2 and the planting device frame 7 so as to swing as the biasing float 2 swings up and down, and the hydraulic cylinder 5 The planting device 3 is configured to be able to be automatically raised and lowered by operating in conjunction with the switching valve 9 so that the posture of the biasing float 2 relative to the planting device frame 7 is maintained within a set range.

In addition, a soil hardness detection sensor 10 is mounted on the biasing float 2, and the soil hardness detection sensor 10 plunges into the soil with its lower end positioned below the ground contact bottom surface 2A of the biasing float 2 and moves as the aircraft travels. The stay 11 is positioned directly in front of the biasing float 2.
This sensor 10
An automatic biasing force adjustment mechanism is provided that automatically and reversibly reduces the biasing force of the biasing spring 6 as the detected hardness decreases based on the detection result. Therefore, assuming that the amount of sinking of the biasing float 2 is proportional to the soil hardness, the amount of sinking of the biasing float 2 is maintained approximately constant, and furthermore,
The lower the hardness, that is, the softer the soil, the more the biasing float 2 will respond to small ground pressure fluctuations.

The sensor 10 swings backward against the elastic urging force due to resistance to movement in the soil, that is, swings elastically backward in substantially proportion to soil hardness.

The biasing force automatic adjustment mechanism has the biasing spring 6 configured as a tension spring, and the biasing force is connected between the swinging member 10a interlocked with the sensor 10 via a wire Y and the bending link 8. A biasing spring 6 is interposed so that the biasing spring 6 is strongly tensioned as the sensor 10 swings backward. That is, the biasing spring 6 serves both as a spring for biasing the sensor 10 to swing and a spring for linking the sensor 10 and the bending link 8.

Furthermore, the riding rice transplanter is equipped with a device that notifies when the remaining amount of seedlings placed on the seedling stand 3A in the planting device 3 falls below a certain level. As shown in FIGS. 2 and 3, the mechanism for detecting that the remaining amount has fallen below a certain level is a system that feeds the seedlings to the seedling take-out ports 3b for each seedling placement section 3a in the seedling placement stand 3A. Appropriate intervals in the direction (intervals smaller than the length of one pine seedling in the direction of seedling feeding)
Contact-type seedling detection sensors 12, 12'... are provided across from each other, and when both sensors 12, 12' switch to a non-detecting state, it is possible to detect when the remaining amount of placed seedlings falls below a certain level. is configured to detect. In other words, when replenishing seedlings to the seedling tray 3A based on the notification, the front end of the supplied seedlings may come up from the seedling loading surface due to collision with the rear end of the remaining seedlings, or
When replenishing seedlings before notification, even if the lower end sensor 12' goes into a non-detecting state because the rear end of the remaining seedlings is lifted off the surface on which the seedlings are placed due to a collision with the replenishing seedlings, erroneous detection will not occur. It is configured as follows.

Therefore, the part of the sensor 10 that goes into the soil,
An idling rotating body 1 that is freely rotatable around the horizontal axis a, rolls on the ground as the aircraft travels, and has a small width.
It consists of 3.

Therefore, when foreign matter such as straw or grass scattered in the field gets caught on the rotating body 13, the rolling rotation of the rotating body 13 pushes the caught foreign matter into the soil and removes it from the rotating body 13. automatically leave.

In the above embodiment, the soil hardness was detected using the amount of rocking displacement of the sensor 10.
The load acting on the mounting portion of the soil may be detected as soil hardness using a load cell or the like.

Further, the present invention may be implemented by configuring the rotating body 13 as a driving wheel. When based on this, the rotating body 13
The increase in airframe running resistance caused by this can be minimized.

Furthermore, the present invention may be implemented by attaching the sensor 10 to the planting device frame 7 or this machine 1.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the rice transplanter according to the present invention, and FIG. 1 is an overall side view, FIG. 2 is a plan view of the main part, and FIG. 3 is a partially cutaway enlarged side view of the main part. be. 10...Soil hardness detection sensor, 13...Rotating body.

Claims (1)

[Scope of Claim for Utility Model Registration] In a rice transplanter equipped with a soil hardness detection sensor 10 that penetrates into the soil and moves, the part of the sensor 10 that penetrates into the soil is connected to a rotating body that can freely rotate around a horizontal axis a. A rice transplanter characterized by being composed of 13 parts. The rice transplanter according to claim 1, wherein the rotating body 13 is an idler. The rice transplanter according to claim 1, wherein the rotating body 13 is a drive wheel.