JPH0440426Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention has a cross-sectional shape that forms a groove in the field at the bottom of a feeding mechanism that feeds out powdered fertilizer, and guides the fertilizer to flow down into the groove. The present invention relates to a fertilization device for a rice transplanter, which is provided with a U-shaped or V-shaped furrower that is open at the rear, and a sensor that electrically detects clogging of fertilizer inside the furrower.

[Conventional technology]

The sensor for detecting fertilizer clogging used in this type of fertilizer applicator for rice transplanters usually uses a method that detects the electrical resistance value between terminals that changes due to the adhesion of fertilizer. Generally, the negative electrode side of the sensor is grounded to the metal trencher itself, and the positive electrode side is connected to an electrode terminal that is insulated and supported at a point on the inner surface of the trencher.

[The problem that the idea attempts to solve]

However, with the sensor having the above-mentioned structure, there have been cases where it has not been possible to sufficiently detect clogging of the downstream guide path caused by fertilizer or the like in the trencher. In other words, the clogging occurs in two places: the upper part of the trencher, where fertilizer mainly adheres, and the relatively lower part, where mud adheres due to condensation of water vapor and water spray from the rice fields. In many cases, it was difficult to detect clogging of both electrodes with a sensor that only had one positive electrode terminal.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to sufficiently detect clogging in the flow guide path that occurs in the trencher, thereby enabling efficient fertilizer application. It is said that

[Means to solve the problem]

The characteristic structure of the present invention, which was made to achieve the above object, is that the positive electrode terminal exposed inside the groove maker is attached vertically to the insulator attached to the groove maker, and the negative electrode terminal is attached to the insulator attached to the groove maker. The sensor is configured by connecting to a groove maker, and its functions and effects are as follows.

[Effect]

According to the configuration of the present invention, even if fertilizer clogging occurs at different positions on the flow guide path of the trencher, some of the electrode terminals arranged in the vertical direction react quickly, so that the clogging can be avoided. It will be detected before it grows unreasonably large.

[Effect of idea]

As a result of the above-mentioned effects, it has become possible to quickly and accurately detect the occurrence of clogging in the downstream guide path within the groove creator.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in Fig. 4, a riding rice transplanter, which is an example of a rice transplanter, has a rear part of a traveling body A equipped with front and rear wheels 1, 2 and a control section 3, which swings up and down with its front end as a fulcrum. A freely movable top link 4 and a pair of left and right lower links 5, 5 are provided, among which a hydraulic cylinder 6 for lifting and lowering is installed between the top link 4 and the traveling body A, and both the links 4 and 5 are provided. , 5, a planting transmission case 8 of a seedling planting device C equipped with a fertilizing device B is connected to the connecting frame 7 so as to be able to roll freely.

The fertilizer application device B is constructed as shown in FIG.

That is, a cylindrical fertilizer dispensing case 10 is attached to a discharge cylinder portion 9a formed on the lower side of the fertilizer storage tank 9, and a driving rotation shaft 11 having a hexagonal cross section that is horizontally suspended within the fertilizer dispensing case 10 is connected to the outer periphery. A rotating body 12 serving as a fertilizer feeding mechanism, which has a plurality of fertilizer-receiving recesses 12a formed along the rotational axis direction at appropriate intervals in the circumferential direction on the surface, is fitted and fixed on the outside, and the outer periphery of the rotating body 12 is fixed. A pair of brushes 13 that are in sliding contact with the surface are provided on the fertilizer dispensing case 10 so that their mounting positions can be adjusted freely.

Further, the support fitting 15 of the float 14, which is one of the constituent members of the seedling planting device C, is connected to the fertilizer feeding case 10 through a fertilizer supply hose 17, and the seedling planting claw is connected to the supporting metal fitting 15 of the float 14, which is one of the constituent members of the seedling planting device C. Grooving device 1 that forms a groove for supplying powder and granular material at a position corresponding to the lateral side of 18
9 is attached via a bracket 20, and a plate body 21 is installed on the front side of the trencher 19 to push and guide foreign materials such as straw waste and grass located in front of the trencher 19 below the trencher 19. , the float 1
It is arranged so that it is in contact with the bottom surface of the soil leveling portion of No. 4, and is arranged so as to supply the powdered fertilizer discharged from the concave portion 12a of the rotary body 12 into the groove.

The groove creator 19 has a U-shaped cross section with an open rear section.
As shown in FIG. 1, a vertically long sensor S is attached to the back wall 19a of the inner surface to detect clogging of fertilizer in the flow path R. This sensor S has terminals 23a and 23b insulated and supported at two locations above and below an insulator 22 screwed to a groover 19.
In addition, the negative electrode side is directly connected to the groove maker 19.

Next, the circuit configuration and operation of the sensor S will be explained based on FIG. 3.

The circuit includes two independent detection units 24.
a, 24b, and a display section 25 that lights up a lamp 26 when the output signal meets certain conditions.

Each of the detection units 24a, 24b has a common stabilized power supply V externally, and voltage comparators _OP1 ,
OP ₂ respectively, and the positive sequence input voltage determined by semi-fixed resistors VR ₁ and VR ₂ and each terminal 23
It compares the negative phase input voltage determined by the resistance value between a, 23b and the ground, and outputs a detection signal when the positive phase input voltage is higher. In addition, semi-fixed resistance
By operating VR ₁ and VR ₂ to adjust the positive phase input voltage of voltage comparators OP ₁ and OP ₂ , each detection unit 24
The sensitivity of a and 24b can be adjusted. Specifically, the positive-sequence input voltage of the voltage comparator OP ₂ to the lower terminal 23b, where clogging due to mud adhesion is likely to occur, is set higher than the positive-sequence input voltage of the voltage comparator OP ₁ to the upper terminal 23a, where clogging with fertilizer occurs. By setting the resistance value of the semi-fixed resistor VR ₂ large so as to increase the sensitivity of the lower detection part 24b than the upper detection part 24a, the The degree of clogging is made to be the same.

The display section 25 includes an OR gate OR into which the output signal from the voltage comparator OP of each detection section 24a, 24b is input, and electric elements such as a transistor Tr and a lamp 26 connected to the output side of the OR gate OR, and each The lamp 26 is configured so that when at least one of the output signals is turned on, the transistor Tr is operated and the lamp 26 is lit.

To implement the present invention, three or more terminals 23a,
23b... may be arranged vertically to form the positive electrode terminal 23. Further, the circuit of the sensor S is not limited to the one shown in the figure, and may have other circuit configurations. For example, an alarm buzzer or the like may be used instead of the lamp 26. Further, although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the fertilization device for rice transplanters according to the present invention, in which Fig. 1 is a rear view of the furrower, Fig. 2 is a cross-sectional view, Fig. 3 is an electric circuit diagram of the sensor, and Fig. 4 is a diagram. It is an overall side view of a rice transplanter. 12... Feeding mechanism, 19... Grooving device, 22...
...Insulator, 9,23... Electrode terminal, S... Sensor.

Claims (1)

[Scope of utility model registration request] A groove is formed in the field at the lower part of the feeding mechanism 12 that feeds out powdered fertilizer, and the cross-sectional shape is U-shaped or V-shaped with an open rear side to guide the fertilizer to flow down into the groove.
A fertilization device for a rice transplanter, which is provided with a letter-shaped furrower 19 and a sensor S for electrically detecting clogging of fertilizer inside the furrower 19,
The positive electrode terminal 23 exposed inside the groove maker 19 is attached vertically to the insulator 22 attached to the groove maker 19, and the negative electrode terminal is connected to the groove maker 19 to connect the sensor S. A constructed fertilizer application device for rice transplanters.