JPH0122412Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Field of industrial application] The present invention is based on a planting device that is attached to a traveling main machine so as to be able to rise and fall freely. This invention relates to a rice transplanter equipped with a sensor that detects soil hardness through backward displacement.

[Conventional technology]

An example of a rice transplanter equipped with a sensor for detecting soil hardness that moves backward as described above is disclosed in Japanese Patent Laid-Open No. 56-39705.

In other words, the structure is such that three sets of floats are arranged in the left and right direction of the planting device, and sensors are arranged between the center float and the left and right floats.

[The problem that the idea aims to solve]

If the float is run with the float in contact with the rice field, waves will be generated from the front end of the float diagonally to the left and right and backward. Therefore, if the sensor is placed in the field between the center float and the left and right floats as in the disclosed structure, waves generated from the front end of the float will collide with the sensor, causing the sensor to swing backward. However, the soil hardness is detected to be harder than it actually is. Furthermore, if the machine body or planting equipment tilts from side to side due to changes in the unevenness of the tiller or the unevenness of the mud surface, the mud pressure acting on the entire sensor may change, leading to malfunctions.

If the sensor is installed so that it protrudes below the bottom of the float, the sensor will come into contact with the hard surface when the planting device is lowered and placed on a hard surface such as a barn floor, truck bed, or the road. If the sensor moves, the device linked to the sensor will also be operated, potentially causing a malfunction in this device.

The present invention was developed with a focus on the above-mentioned problems, and is designed to prevent the soil hardness detection accuracy of the sensor from decreasing due to the influence of waves from the float or the rolling of the aircraft. and,
The purpose is to prevent malfunctions from occurring in devices linked to the sensor.

[Means to solve the problem]

The feature of this invention is that in the above rice transplanter,
The sensor is disposed in front within the width of a float located in the center of the planting device in the lateral direction, and at least a tip portion of the sensor is elastically displaced in a direction that buffers the external force when an external force is applied from below. The functions and effects are as follows.

[Effect]

With the configuration described above, waves are generated behind the sensor, so the waves generated by the float will not collide with the sensor, and the sensor will not be affected by the waves.

Additionally, since the sensor is placed in front of the center float, it is not affected by the aircraft's left-right tilting as much as possible.

If the sensor is installed so that it protrudes below the bottom of the float, the tip of the sensor will be exposed when the planting device is lowered and placed on a hard surface such as a barn floor, truck bed, or road. Even if it comes into contact with a hard surface, only this tip part will be elastically displaced; the entire sensor will not be displaced backwards, and the device linked to this sensor will not be accidentally operated. . moreover,
Because the tip of the sensor is elastically displaced, the sensor itself will not be damaged.

[Effect of idea]

As described above, the sensor is no longer affected by waves generated by the float, and is also less affected by changes in mud pressure caused by tilting of the aircraft, making it possible to improve the accuracy of soil hardness detection by the sensor. It became like that.

Furthermore, when the planting device is lowered on the road, damage to the sensor itself and effects on other devices linked to the sensor can now be reduced.

〔Example〕

Hereinafter, an embodiment of the present invention will be described based on the drawings. A plurality of floats 2 are installed at the rear of a riding-type traveling machine 1 and are vertically swingable with a position near the rear end as a fulcrum.
A multi-row planting device 3 equipped with ... at appropriate intervals in the lateral direction is connected to the planter 3 so that it can be raised and lowered freely via a link mechanism 4, and a hydraulic cylinder 5 is provided to drive the planting device 3 to raise and lower it. In a certain riding rice transplanter, a spring 6 is provided that swings and biases the float 2 located at the center in the left-right direction of the planting device 3 downward among the floats 2... It is configured to swing up and down with respect to the frame 7 of the planting device 3.

Further, a bent link 8 interposed between the front end of the float 2 and the frame 7 so as to swing as the float 2 swings up and down and a switching valve 9 of the hydraulic cylinder 5 are linked in operation. The planting device 3 is configured to be able to automatically move up and down so that the attitude of the float 2 relative to the frame 7 is maintained within a set range.

In addition, the float 2 is provided with a sensor that protrudes downward from the ground contact bottom surface 2A of the float 2 and detects soil hardness by having a backward rocking displacement against the elastic biasing force due to soil resistance. 1
0 is supported via a stay 11 in a state immediately in front of the float 2, and based on the detection result of this sensor 10, the biasing force of the spring 6 is automatically adjusted as the detected hardness decreases. In addition, an automatic biasing force adjustment mechanism is provided to reversibly reduce the biasing force. Therefore, when the amount of sinking of the float 2 is proportional to the soil hardness, the amount of sinking of the float 2 is maintained almost constant, and moreover, as the hardness decreases, that is, the softer the soil becomes,
The float 2 now responds to even small ground pressure fluctuations.

The automatic urging force adjustment mechanism includes a swinging member 10 in which the spring 6 is configured as a tension spring, and a swinging member 10 interlocks with the sensor 10 via a wire W.
The spring 6 is interposed between the bending link 8 and the bending link 8 so that the spring 6 is strongly tensioned as the sensor 10 swings backward. In other words, the spring 6
This serves both as a spring for swinging and biasing the sensor 10 and a spring for linking the sensor 10 and the bending link 8.

Therefore, the tip portion 10A of the sensor 10
is made of rubber (elastic material), so that when an external force is applied from below, it can be elastically displaced in a direction (rearward and upward) that buffers the external force.

Therefore, as the planting device 3 descends, the sensor 1
When the tip of the 0 comes into contact with the hard ground, the elastic displacement of the tip part 10A of the sensor 10 alleviates the contact impact, preventing deformation or damage of the sensor 10, and preventing the elevation control system (switching valve) of the planting device 3. 9 etc.) can be prevented.

[Another example]

FIG. 4 shows the tip portion 10A of the sensor 10,
A spring 10C is provided which is pivotally connected to the proximal end portion 10B so as to be able to swing forward only, and which biases the distal end portion 10A to swing backward.
Another embodiment is shown in which the sensor 0A is configured to be able to be oscillated in the forward and upper external force buffering direction due to an external force from below, and FIG. Spring 10D that is freely attached and biased to move in the protruding direction
Another embodiment is shown in which the distal end portion 10A of the sensor 10 is configured to be retractable in an upward external force buffering direction in response to an external force from below.

Note that the present invention may be implemented by attaching the sensor 10 to the frame 7 of the planting device 3.

[Brief explanation of the drawing]

The drawings show an embodiment of the rice transplanter according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a plan view of the main parts, Fig. 3 is an enlarged side view of the main parts, Figs. Each figure is an enlarged side view of a main part showing another embodiment. 1... Traveling machine, 3... Planting device, 2... Float, 10... Sensor for detecting soil hardness.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Planting device 3 connected to the traveling machine 1 so that it can be raised and lowered freely
In a rice transplanter equipped with a sensor 10 that protrudes below the bottom surface of the float 2 and detects soil hardness by displacement backward due to soil resistance, The sensor 10 is disposed in front within the left and right width of the float 2 located at , and at least the tip portion 10A of the sensor 10 is configured to be elastically displaceable in a direction to buffer the external force when it receives an external force from below. A rice transplanter that is characterized by: 2. The rice transplanter according to claim 1, wherein the sensor tip portion 10A is made of an elastic material.