JPH018090Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention issues an alarm when there are continuous shortages of plants in the planting section of the rice transplanter, and also indicates whether or not the planting has been done using the planting claw. This invention relates to a stock shortage alarm device configured to display a continuous display at all times.

(b) Prior art Conventionally, photoelectric sensors, magnetic sensors, etc. have been placed in the planting claw passage path on the back side of the seedling take-out board.
A stock-missing detection device is known that detects whether the planting claw has descended while holding the seedling.

(c) Problems that the invention aims to solve However, photoelectric sensors, magnetic sensors, micro-switches, etc. are not good at sensing light and thin objects such as planted seedlings. Problems such as deterioration of the water quality and damage to the stems and leaves of seedlings were occurring.

This invention uses a tactile sensor that changes voltage with just a slight touch to detect seedlings without having to press hard like conventional magnetic switches or micro switches, and unlike photoelectric switches, the light source does not get dirty with mud. This is an alarm device that does not cause malfunctions due to this.

In addition, we have installed a two-stage alarm system for missing plants, so that if only one plant is momentarily missing, the neighboring seedlings will receive more sunlight and receive more nutrients because there are no plants next to them at the stage of development. Since it activates tillering, it can be used as a cover for the summer growing machine, so it will ignore it and only issue a warning such as a buzzer when 3 to 5 plants are missing in a row, and when only one plant is missing. Does the lamp light up?
The warning limit for continuous plant shortages can be adjusted depending on the moisture condition of the seedlings, the weather, etc. by making the display appear as if a lit lamp is extinguishing.

(d) Means for solving the problem The purpose of the present invention is as described above. Next, the configuration for achieving the purpose will be explained.

A tactile contact sensor 9 is made of a conductive material, and when a seedling comes into contact with the tactile contact sensor 9, the presence or absence of a planted seedling is detected. Capacitor 30 and variable resistor 2 so as not to activate the stock alarm device
A charging circuit is configured by the combination of 5, and the number of plants from the time the plant shortage starts until the warning lamp lights up can be adjusted by the variable resistor 25, and the number of plants that are planted continues to be missing for a certain number of plants. This system is designed to activate a stock shortage alarm device when a stock shortage occurs.

(E) Embodiment The purpose and structure of the present invention are as described above. Next, the structure of the embodiment shown in the attached drawings will be explained.

Figure 1 is an overall view of the walking type 4-row rice transplanter, Figure 2
The figure is also a perspective view of a walking type two-row rice transplanter.

In the four-row walking type rice transplanter, an engine 2 is placed on a main float 1, and side floats 2, 2 are provided on both sides of the main float 1. engine 2
From the traveling transmission case 3a installed at the rear of the
The swing cases 5, 5 are pivotally supported, and lug wheels 4, 4 are supported at the ends of the swing cases 5, 5.
Power is transmitted from the traveling mission case 3a to the planting mission case 3b via a power transmission shaft within the power transmission case 11, thereby driving the seedling stand 6 and the planting claws 7.

The planting claw 7 rotates on an elongated trajectory passing through the notch of the seedling take-out plate 8, pinches and cuts the seedling pine placed on the seedling stand 6 and moves on the seedling take-out plate 8, and Plant on flattened areas. Reference numeral 19 is a handle, and since the operator is holding the handle and looking straight ahead in order to plant the seedlings straight, it is not possible to monitor for missing plants in the planting area under the seedling stand.

In addition, although a walking type rice transplanter is illustrated in this example, in a riding type rice transplanter, regardless of whether it is a front-planting type or a rear-planting type, the operator cannot see the planting status, and only the missing plant alarm device is used. I rely on it.

In the present invention, a tactile type contact sensor 9 is provided as a sensor on the back side of the seedling take-out board.

FIG. 3 is a perspective view of the tactile type contact sensor 9, and FIGS. 4, 5, and 6 show examples in which the tactile type contact sensor 9 is mounted across the seedling outlet reinforcing plate. The drawings, FIG. 7, FIG. 8, and FIG. 9 are drawings showing an embodiment in which a thin rod-shaped sensor is provided protruding from the exit portion of the seedling outlet reinforcing plate.

The tactile type contact sensor 9 is shown in Figures 4 and 5.
In Figure 6, the planting claw 7 of the seedling take-out plate 8 is
It is attached to the notch through which the planting nail passes, but where the stems and leaves of the seedling necessarily pass.

That is, it is installed between the left and right seedling outlet reinforcing plates 15L and 15R, and the sensor 9a and the seedling outlet reinforcing plate 15 are of course insulated.

14 is a seedling guide made of an elastic body.

In Fig. 7, the seedling outlet reinforcing plates 15L, 15
The sensor 9 is installed horizontally at the exit of the seedling outlet reinforcing plate 15 instead of being placed across the R. 10 is an insulating case for the tactile sensor.

In addition, the embodiments shown in FIGS. 8 and 9 use tactile contact sensing to prevent moisture or mud from adhering to the sensor 9 and preventing it from falling forever, and to prevent variations and errors in the signals detected by the sensor 9. The sensor 9 is protruded from the left and right, and is extended in the direction along the rotation locus of the planted seedling.

By following the path of the seedlings in this way, the sensors do not get mud stuck to the sensor and cannot be removed, and dew does not accumulate one after another, and is quickly washed away by the next stem and leaves.

FIG. 10 is a circuit diagram of the stock shortage alarm device of the present invention. The sensor 9 is made of a thin conductor, and is placed at a position where it touches the seedlings that are being planted as described above.

The sensor 9 has a thin conductor protruding from the insulating case 10, and the connector of the insulating case 10 is connected to the positive input terminal of each of the comparators 27 and 28 via a shielded wire and a resistor (about 100 kΩ).

The reference potential output from the voltage regulator 26 is input to the negative input terminals of the comparators 27 and 28. A bias resistance is provided between the plus and minus terminals of each comparator 27, 28 by using a variable resistor 29 for bias voltage setting and a resistor 38.

When the tactile type contact sensor 9 is not in contact with the planted seedlings, the potential of the positive input terminal is made slightly higher than the potential of the negative input terminal. Therefore, when the sensor 9 is not in contact with the planted seedlings, the outputs of the comparators 27, 28, etc. are at a high level, but when the sensor 9 is in contact with the planted seedlings,
This means that the seedlings are grounded through the surface resistance value of about 80 MΩ, and the positive input terminal has a lower potential than the negative input terminal, and the outputs of the comparators 27, 28, etc. become low level.

The variable resistor 29 is used to adjust the bias voltage, and therefore the sensitivity of the seedling sensor 9 is also adjusted by the variable resistor 29, depending on the wet/dry and weather conditions of the seedling.

The output of the comparator 28 is configured to light up the check clamp 21 through a PNP type switching transistor 22, and when the planted seedlings are not touched, the output of the comparator 28 is at a high level, and the switching transistor 22 lights up the check clamp 21. 22 is OFF, and the check clamp 21 is off, but when the sensor 9 touches the planted seedling, the output of the comparator 28 becomes low level, the switching transistor 22 is activated, and the check clamp 21 is configured to turn on. There is.

On the other hand, the missing plant warning lamp 20 is configured to turn on when the sensor does not come into contact with the planted seedling, using an inverting circuit using an NPN type switching transistor 24 and a PNP type transistor.

A charging circuit is configured by a combination of a capacitor 30 and a variable resistor 25 so that the missing stock warning lamp 20 does not light up immediately when only one stock is missing. It is possible to adjust the number of plants from when this starts to occur until the warning lamp lights up. 39 is a diode for preventing surge voltage.

In this way, the check clamp 21 and the missing stock warning lamp 20 constitute a double warning device, and the check clamp 21 checks the presence or absence of planted seedlings one by one. At times, the alarm lamp 20 is configured to turn on.

(f) Effects of the invention Since the invention is constructed as described above, it has the following effects.

First, if continuous plant loss occurs for some reason during planting work, the operator can be notified of the occurrence of plant loss using an alarm lamp, buzzer, etc. This eliminates the need to continue work without knowing if a problem occurs, and the cause can be dealt with early, reducing the effort required for later replanting work.

Second, the capacitor 30 constitutes a charging circuit with a variable resistor 25, and by adjusting the resistance value of the variable resistor 25, it is possible to adjust the number of consecutive missing plants that should trigger an alarm, so Accordingly, the operator can change the number of consecutive plants that are acceptable to the operator depending on the planting condition.

Thirdly, since the tactile contact sensor 9 is composed of a thin rod-shaped sensor to detect planted seedlings,
It is also possible to detect seedlings that are not held in the correct position by the planting nails, or that are tilted or bent.

[Brief explanation of the drawing]

Figure 1 is an overall view of the walking type 4-row rice transplanter, Figure 2
The figure is also a perspective view of the walking type 2-row rice transplanter.
The figures are perspective views of the tactile sensor, Figures 4 and 5.
Figure 6 is a diagram showing the sensor installation function, Figure 7
8 and 9 are drawings showing other mounting examples, and FIG. 10 is a circuit diagram of the alarm device. A... Planted seedling, 9... Tactile contact sensor, 10... Insulating case, 20... Missing stock warning lamp, 21... Check clamp, 20... Missing stock warning lamp, 25... Variable resistor. Container, 30...Condenser.

Claims (1)

[Scope of utility model registration request] A tactile contact sensor 9 is made of a conductive material, and when a seedling comes into contact with the tactile contact sensor 9, the presence or absence of a planted seedling is detected. A capacitor 30 and a variable resistor 2 are installed to prevent the stock alarm device from operating.
A charging circuit is configured by the combination of 5, and the number of plants from the time when plant shortages start to occur until the warning lamp lights up can be adjusted by the variable resistor 25, and the number of plants that have been planted continues to be missing by a certain number of plants. 1. A plant shortage alarm device for a rice transplanter, characterized in that it is configured to activate the plant stock alarm device when a rice transplanter is infected.