JPS62239910A - Clogging sensor of fertilizing apparatus - 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 [Field of Industrial Application] The present invention relates to a sensor for a fertilizer application device installed in, for example, a rice transplanter. The structure is such that the fertilizer is dropped and supplied into the field's fertilization groove through a furrower, and an electrode is provided inside the furrower, and the fertilizer that adheres and accumulates inside the furrower is absorbed by the electric resistance between the two electrodes. The present invention relates to a clogging sensor for a fertilizer application device, which detects based on a change.

[Conventional technology]

As a clogging sensor for this type of fertilization equipment, one electrode is connected to the trencher body and grounded, and the other electrode is supported by protruding from an insulator that is thinly attached to the inner wall of the trencher. This makes it possible to electrically detect clogging of fertilizer that occurs in the furrower based on the degree of adhesion of fertilizer that adheres to and accumulates on the insulator.

In other words, due to the adhesion of fertilizer on the insulator, conduction occurs between the trencher body and the electrode, which lowers the electrical resistance between the two, and when the accumulation of fertilizer progresses and the resistance falls below the standard value, the sensor detects this. It is designed to output a signal.

[Problem that the invention seeks to solve]

However, the sensor with this structure has the following problems.

In other words, when fertilizing a paddy field at the same time as rice planting or direct sowing, muddy water splashed up during the work may adhere to the insulation, or water vapor from below may When dew condenses on the insulator, the moisture forms a water film, which creates electrical continuity between the groove cutter body and the electrode, causing a false detection signal to be output even if there is no fertilizer clogging. .

The present invention focuses on this situation and aims to prevent false detection by the sensor due to conduction due to the water film by making a simple modification to the electrode structure of the sensor.

[Means for solving problems]

A characteristic configuration of the present invention, which has been made to achieve the above object, is that at least one of the electrodes is placed in a dotted manner in the space within the groove cutter via an insulated small-diameter arm.

[Function] In other words, according to the above configuration, the sensor outputs a detection signal when the fertilizer attached to the insulator grows and reaches the electrode supported in an insulated state by the arm, and the positive and negative electrodes are detected by the sensor. Or, if the minus side is connected to the groove cutter and grounded, the positive side electrode and the groove cutter are electrically connected.If water droplets simply adhere to the arm, Because of their small diameters, they cannot form a water film that conducts them; they simply fall as water droplets and cannot cause false detection.

〔Effect of the invention〕

As a result, it has become possible to prevent erroneous detection due to moisture adhesion and to accurately detect fertilizer clogging.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in Fig. 2, a seedling planting station (A) is connected to the rear end of a riding type traveling body (1) via a link mechanism (3) that moves up and down by the expansion and contraction of a hydraulic cylinder (2). It consists of a riding type rice transplanter.

The seedling planting device (A) includes a transmission case (5) to which power is transmitted from the traveling machine (1), a seedling platform (6) on which mat-shaped seedlings (-) are placed, and a seedling platform (6). For planting, seedlings are planted one by one in the field using an arm (7)... and multiple soil leveling floats (8) arranged in parallel in the left and right direction of the seedling planting device (8).
Further, the seedling planting device (8) is equipped with a fertilizing device (B) that sends fertilizer to the field during the seedling planting operation.

As shown in Figure 1, the fertilizer applicator (B) is configured for five rows so that each planting arm (7) sends fertilizer to each side of the field where seedlings are to be planted. The structure is explained in detail below.

A hopper (10) for storing powdery fertilizer (9), and a casing (11) connected to the lower part of the hopper (10).
The feeding mechanism (12) built into the feeding mechanism (12)
One row unit of the fertilization device (B) consists of a hose (13) that guides the fertilizer sent out from the fertilization device (B), and a groove cutter (14) connected to the lower end of the hose (13).

The feeding mechanism (12) has a recess (12a) on the top surface.

(12a) and a link mechanism (15) that sets the operating trajectory of the planting arm (7).
By transmitting the rocking force through the rod (16),
The recess (12a) swings back and forth around the left-right axis.
, (12a) is operated so that the fertilizer that has entered the container is distributed and dropped in the front and rear directions.

As shown in the figure, the casing (11) housing the feeding mechanism (12) is equipped with brushes (17), (17) that come into sliding contact with the feeding cylinder (12b). ) is regulated to a certain amount.

The trencher (14) is made of metal and has a substantially U-shaped cross section with a rearward opening.A bracket (18) is attached to the front wall of the groover (14).
Groove plate (19) provided on the land leveling float (8)
The trencher (14) is attached to the earth leveling float (8) so that its vertical position can be adjusted by connecting the rear part of the groover (14) to the bracket (18) with a slotted bolt.

Furthermore, the hose (1) inside the groove creator (14)
3) is provided with a clogging sensor (S) for detecting clogging or narrowing of the fertilizer supply path from the feeding mechanism (12).

In other words, the sensor (S) is connected to the front wall (
14a) through screws (20), (20), an insulator (21), a small diameter arm (22) protruding from this insulator (21), and an arm (22) exposed at the tip of the arm (22). Positive side electrode piece (23), insulator (21)
It also includes a negative electrode piece (24) which also serves as a lug terminal and which is fastened to the groove creator (14) by the screw (20). The arm (22) is a metal core wire (27) connected to the positive cord (25) of the sensor (S) and covered with insulating resin, and the exposed portion at the tip, that is, the electrode piece (23) Groove machine (14)
It is made to protrude downward so that it exists like a dot in the inner space. An appropriate gap is provided between the positive side electrode piece (23) and the groove cutter (14) to prevent water droplets from intervening and causing conduction between the two.

The positive cord (27) connected to the core wire (27)
25) and a cord (26) connected to the negative electrode piece (24) is connected to a detection circuit (not shown) of the sensor (S). This detection circuit consists of an electrode piece (23
), (24) is converted into a voltage value, and then compared with a reference voltage value. If the voltage value is lower than that, a detection signal is output and the lamp (L) is turned on. The lamp (L) is connected to the casing (11) of each strip corresponding to the sensor (S) of each strip.

This is so that it is possible to easily identify a groove cutter (14) that is clogged with fertilizer or narrowed.

[Another example]

In carrying out the present invention, two arms (22), (22) are made to protrude from the insulator (21), and one of them has a positive electrode piece (23) and the other has a negative electrode. The piece (24) may also be supported. Moreover, the electrode piece (
23) and (24) may be separate members that can be replaced.

Note that although numbers are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the clogging sensor for the fertilization device according to the present invention, and FIG. 1 is a longitudinal side view of the fertilization device, FIG. 2 is a cross-sectional plan view of the main parts, and FIG. 3 is an overall side view of the rice transplanter. be. (12)... Feeding mechanism, (13)...
・Hose, (14)... Groove cutter, (22)...
...Arm, (23), (24)...
electrode.

Claims (1)

[Claims] The structure is such that the powdery fertilizer sent out from the feeding mechanism (12) falls and is supplied into the fertilization groove of the field via the hose (13) and the furrower (14), and the furrower (14) Electrodes (23) and (24) are installed inside the electrodes (23) and (24) to remove the fertilizer that adheres and accumulates inside the trencher (14).
(24) A clogging sensor for a fertilization device configured to detect based on a change in electrical resistance between at least one of the electrodes (23) and an insulated small-diameter arm (22). A clogging sensor for the fertilization device is placed in a dotted manner in the space inside the furrower (14).