JPH0870662A - Fertilizer clogging sensor of fertilizing apparatus - Google Patents

Abstract

PURPOSE: To prevent the clogging of fertilizer induced by electrodes by suppressing the protruding extent of an electrode and to prevent the erroneous detection caused by the attachment of a small amount of fertilizer even if both electrodes are placed close to each other. CONSTITUTION: A fertilizer is discharged from a fertilizing guide into a fertilizing furrow formed on a field with a furrow opening tool and the fertilizer deposited on the fertilizing guide is detected with a pair of electrodes. The objective fertilizer clogging sensor of the fertilizing apparatus having the above construction has the following structure. One of the electrodes is connected to-the fertilizing guide and the other electrode is attached to the front or rear side of the fertilizing guide via an insulating material in a state exposed in the fertilizing guide. An insulating material is applied to the circumference of the electrode in a state extended along the inner surface of the right and left walls of the fertilizing guide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fertilizer clogging sensor for a fertilizer applicator mounted on a traveling vehicle body of a paddy working machine such as a rice transplanter.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 4-61603 has a structure in which a fertilizer in the form of powder or granules sent from a feeding device is supplied from a fertilizer guide disposed at the rear of a groove making tool into a fertilizer groove in a field. In a fertilizer application configured to detect the fertilizer deposited and deposited in the fertilizer guide by using a pair of electrodes, one of the electrodes is connected to the fertilizer guide itself and the other electrode is not directly energized to the fertilizer guide. A fertilizer clogging sensor for a fertilizer application is disclosed in which the other electrode is provided at the tip of an insulating arm that is attached via an insulating material and is attached in a state of protruding inside the fertilizer application guide.

[0003]

In the above-mentioned conventional fertilizer clogging sensor, the other electrode is provided at the tip of the insulating arm mounted so as to project inside the fertilizer application guide.
Fertilizer tended to adhere to the soil, which made it easier for the manure to clog. Further, if the fertilizer guide is clogged with fertilizer, it is difficult to get caught in the arm when cleaning the fertilizer guide to remove the clogged fertilizer.

[0004]

In order to solve the above-mentioned problems, the present invention is configured so that fertilizer is discharged from inside the fertilizer application guide into the fertilizer application groove formed in the field by means of a grooving tool. In a fertilizer application configured to detect the fertilizer deposited and deposited on a fertilizer using a pair of electrodes, one of the electrodes is connected to the fertilizer guide itself, and the other electrode is provided with an insulating material on the front side or the rear side of the fertilizer guide. The fertilizer clogging sensor for a fertilizer application, wherein the fertilizer clogging sensor of the fertilizer application is formed so as to be exposed inside the fertilizer application guide through the intermediary -It was.

[0005]

The function and effect of the invention: An electrode or the like provided for detecting the clogging of the fertilizer is provided so as not to project into the fertilizer guide so that it does not induce the clogging of the fertilizer in the fertilizer guide, and therefore both electrodes are close to each other. Even if the fertilizer is clogged in the fertilizer guide, the clogging of the fertilizer can be accurately detected, and it is possible to prevent erroneous detection due to a small amount of the fertilizer attached.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The riding rice transplanter 1 is configured such that a seedling planting machine 4 is attached to the rear side of the traveling vehicle body 2 via an elevating link device 3 that moves up and down. Further, a fertilizer application device 5 is arranged on the rear side of the traveling vehicle body 2 between the traveling vehicle body 2 and the seedling planting machine 4.

The traveling vehicle body 2 includes a pair of left and right steering front rotating wheels 6 and 6 and a pair of left and right rear driving wheels 7 and 7.
It has. Further, the mission 8 is arranged on the front side, and the front wheel axle frame 9 is arranged from the left and right side portions of the mission 8.
.9 is fixed, and front wheel final cases 10.10 are connected to both ends of the frame 9.
Front wheels 6.6 on the front wheel axle protruding outward from the lower side
Is attached. The power inside the mission 8 is the front wheel axle frame 9.9 and the front wheel final case 10.
It is transmitted by the transmission mechanism in 10 and the front wheels 6 and 6 are driven to rotate. In addition, the frame 11 on the rear side of the mission 8
The front end of 11 is fixed. The rear ends of the frames 11 and 11 are fixed to the horizontal frame 12, and a bearing portion at the center of the horizontal frame 12 has a shaft center in the front-rear horizontal direction at the left and right central portions of the rear wheel frame 13. The rear wheel rolling shaft 13a, which is fixed toward the rear wheel, is fitted. Rear wheel gear cases 14 and 14 are fixed to the left and right ends of the rear wheel frame 13, and rear wheel gear cases 14 and 14 are attached.
・ Rear wheel 7.7 on the rear wheel axle protruding laterally from the outer side of 14
Is attached. Therefore, mission 8 and
A vehicle body frame composed of a frame 11 and a lateral frame 12.
The rear wheel frame to which the rear wheels 7 and 7 are attached
The frame 13 can be rolled around the rear wheel rolling shaft 13a. The power in the mission 8 is transmitted from the rear side to the left and right rear wheel gear cases 14 and 14 by the rear wheel transmission shaft 1.
The rear wheels 7 and 7 are driven to rotate by being transmitted by 4a and 14a. The power input to the mission 8 is the frame 11
11 is temporarily transmitted from the engine E supported on 11 to the hydraulic pump P fixed on the mission 8 by the first belt transmission device 15, and from there, the continuously variable second belt transmission device 16 is attached to the input shaft of the mission 8. It is transmitted at high and low speeds without steps. In addition, the transmission to the seedling planting machine 4 is the mission 8
The planting fertilization clutch case 25, in which the first transmission shaft 24 is connected to the planting fertilization drive shaft protruding rearward from the right side of the plant, and the rear end is attached to the link base frame 31.
Connect to the input shaft of. The power input into the planting fertilization clutch case 25 passes through the planting fertilization clutch CPF that intermittently transmits the power to the seedling planting machine 4, and then the planting fertilization clutch case 25.
It is transmitted to the planted drive shaft 25a protruding to the rear side portion. Further, it is transmitted to the fertilization drive shaft 25b projecting to the rear side portion of the planting fertilization clutch case 25 via the fertilization clutch CF which intermittently transmits the power to the fertilizer application device 5. And the planted drive shaft 25a
From the planting transmission shaft 26 through the planting transmission shaft 26 of the seedling transplanter 4.
The drive arm 25b ', the crank rod 27a, and the crank arm from the fertilizer drive shaft 25b.
It is transmitted to the fertilizer transmission shaft 28 via the frame 27b. And
From fertilizer transmission shaft 28 to transmission arm 27c ..., transmission rod 2
7d ..., Feeding drive shaft 2 via feeding drive arm 27e.
9, and each feeding device 51 ... Is driven. A one-way clutch is provided between the feeding drive arms 27e ... And the feeding drive shaft 29, and the reciprocating swing of the feeding drive arms 27e ... Rotates the feeding drive shaft 29 intermittently in a fixed direction. Let Fertilization clutch CF for intermittently transmitting power to the fertilizer application device 5
Is operated by a solenoid S to engage and disengage the clutch, and engages and disengages the planted clutch CP (for example,
The on / off operation is performed in synchronization with the on / off of the on / off clutch switch SW-P which is interlocked with the on / off operation of the on / off clutch lever LP. Further, in the following cases, the fertilizer application CF is configured to be disengaged to prevent the abnormal situation from becoming worse and the fertilizer application device 5 to be operated properly. (FIG. 10) When it is detected that the operation switch SW-B1 of the blower 53 is in the “off” state, the fertilizer application CF is turned off to prevent the fertilizer from clogging due to the absence of the transport air.

The air pressure sensor-S in the fertilizer hose 52 ...
When W-B2 ... Does not detect the flow of the compressed air, the fertilizer application CF is disengaged to prevent clogging of the fertilizer due to no air flow. When the fertilizer clogging sensor-FS ... Detects clogging of fertilizer in the fertilizer application guide 56, the fertilizer application clutch CF is disengaged to operate to prevent deterioration of the fertilizer clogging state.

When the reverse operation detection switch SW-B3 of the traveling lever LD detects the reverse operation, the fertilizer application clutch CF is disengaged to prevent clogging of the fertilizer due to the intrusion of mud into the fertilizer application guide 56. When it is detected that the driving load of the seedling planting machine 4 or the fertilizer applicator 5 exceeds the set value (for example, the safety clutch C configured to disconnect the transmission when the driving load of the set value or more occurs)
When the excessive load detection switch SW-B4 detects that S is in the transmission cut-off state), the fertilizer application CF is cut off to prevent damage to the drive system.

In the transmission mechanism in the planting fertilizer application case 25, the safety clutch CS is provided on the transmission better side than the power branch point where the transmission to the seedling planter 4 and the transmission to the fertilizer application device 5 branch. Further, a planting fertilizer application clutch CPF is provided on the power transmission side of the safety clutch CS.
As a result, the safety clutch CS operates regardless of the increase of the driving load on the seedling planting machine 4 side and the increase of the driving load on the fertilizer application device 5 side. Incidentally, the power transmission from the input shaft 25c of the planting fertilizer application clutch case 25 is transmitted to the planting fertilizer application clutch CPF and the safety clutch CS, and the transmission gears 25d and 25f are transmitted from the lower side of the safety clutch CS.
The power is branched to the drive shaft 25a with a plant. In addition, a fertilization clutch CF is provided on the lower transmission side of the safety clutch CS and on the shaft core extension line, and is transmitted to the fertilization drive shaft 25b. In the transmission mechanism of the seedling planting machine 4, the planting device 42 for each row ...
Even after the power is branched to another safety clutch CS
... are provided.

Further, the alternator G mounted on the engine E is transmitted from the second output shaft of the engine E by the third belt transmission device 17, and the electricity generated there is
Blower 53 for generating compressed air for fertilizer transfer of the fertilizer application device 5
The blower 53 is electrically connected to the motor M of FIG. In addition, the traveling vehicle body 2 has front wheels 6 and
A steering wheel 18 for steering the steering wheel 6 is provided, and a seat 20 is mounted on an engine cover 19 that covers the upper side of the engine E. Further, a step floor 21 is horizontally provided below the periphery of the seat 20 and the handle 18, and
Riding steps 22 and 22 are fixedly installed on the left and right sides of the aircraft. Further, the lower side of the handle 18 is covered with a front cover 23.

The lifting link device 3 includes frames 11 and 11.
An upper link 32 and lower links 33, 33 are rotatably attached to a link base 31 fixed to the rear side of the link base 31, and a vertical link 34 is connected to the rear ends of the upper and lower links. Then, the connecting shaft 40a fixed to the transmission case 40 of the seedling planting machine 4 is rotatably connected to the bearing portion projecting rearward from the lower end of the vertical link 34, and the seedling planting machine 4 with respect to the traveling direction. It is attached so that it can rotate left and right. The base side of the hydraulic cylinder 35 is pivotally supported by a support member fixed to the frames 11 and 11 below the engine, and the piston rod side is connected to the upper link 3
Swing arm 32a extending downward integrally with the base of No. 1
Is connected to the tip of the via a spring. When the hydraulic cylinder 35 is expanded and contracted, the elevating link device 3 is moved up and down, and the seedling planting machine 4 is moved up and down. The hydraulic cylinder 35 is switched and operated by a hydraulic valve.

The seedling planting machine 4 has a six-row planting configuration, and the transmission case 40 having an E-shaped plan view also serves as the frame of the seedling planting machine 4, and the front side is higher than the transmission case 40. The seedling mounting table 41 is provided so as to be inclined. The seedling mounting table 41 is connected to the left and right reciprocating mechanism in the transmission case 40 so as to reciprocate left and right. Further, the rear end portion of the transmission case 40 is provided with the planting devices 42 for the number of planting lines, and the seedling placing table 41 reciprocates left and right to place the seedlings on the table at the lower end side of the seedling placing table. While sequentially supplying to the seedling take-out port of the seedling receiving frame 44, the planting tools 43 of the planting devices 42 rotate while drawing a predetermined locus, so that the seedlings fed to the seedling take-out port are planted 43. It is designed to be held by the planting claws of ..., and when the held seedlings reach the field, they are pushed out and planted. In addition, at the bottom of the seedling planting machine 4, there is a center float 4 in the center.
5. A pair of side floats 46, 46 are attached to the left and right with the rear part pivotally supported so that the front part moves up and down. These floats 45, 46, and 46 slide on the ground in the field during the planting operation. By the way, the center float 45 is also a sensor for detecting irregularities in a field scene, and the hydraulic valve is adapted to operate in accordance with the vertical movement of the front end side of the sensor float 45. That is, when the center float 45 moves upward, the hydraulic valve 36 is operated in a direction to extend the hydraulic cylinder 35, and conversely, when the center float 45 moves downward, the hydraulic valve is operated in a direction to contract the hydraulic cylinder 35. Also,
Each float 45, 46, 46 is provided with a fertilizer making tool 47 for forming a fertilizing groove near the seedling planting position of each row, and a fertilizing guide 56 for discharging fertilizer. …
The fertilizer is discharged from the fertilizer application guides 56 ... Reference numeral 48 is a spare seedling mount.

The fertilizer applicator 5 is a lateral strip fertilizer applicator for applying fertilizers in the vicinity of planted seedlings. First, a hopper 50 for accommodating fertilizer and a feeding device 51 attached below the hopper 50.
Are located on the front side of the seedling planting machine 4 and on the rear side of the seat 20 of the traveling vehicle body 2, and a plurality of bodies (here, 6
Six feeding devices are arranged in parallel on the left and right to accommodate row planting. The fertilizer hoses 52, which guide the fed fertilizer to the fertilizer guide 56, are connected to the respective feeding devices 51. Further, the fertilizer hose 52 is blown by the pressure of the blower 53.
Fertilizer is forcibly transferred inside.

The hopper 50 is integrally provided on the left and right in a horizontally long shape, has a fertilizer discharge port 50a communicating with the feeding devices 51 of the respective strips at the bottom, and a lid 50b at the top to open and close. Has become. The feeding device 51 is configured by incorporating a feeding roll 51b that feeds the fertilizer in the hopper 50 downward into a feeding case 51a that is opened vertically. The feeding case 51a ... is connected with the fertilizer discharge port 50a at the bottom of the hopper 50 butted against the upper opening thereof.
The upper opening of the funnel portion 55 is abutted and connected to the lower opening. The feeding roll 51b is provided with a feeding groove 51c ... Adjustable in length extending in the axial direction on the outer periphery thereof, and the feeding groove 51c. During the rotation, the fertilizer in the feeding groove 51c is rolled by a brush 51d attached so as to slide on the outer peripheral surface of the feeding roll 51b.
The outer peripheral surface is scraped off, and the fertilizer is fed downward by a predetermined amount. The fertilizer fed downward by the feeding roll 51b is received by the funnel portion 55 and falls into the pipe portion 55a integrated with the lower discharge port portion of the funnel portion 55. By the way, the front end of the pipe 55a is fitted into the air chamber 54, and the fertilizer hose 52 is connected to the rear end of the pipe 55a so that the compressed air in the air chamber 54 passes through the pipe 55a. Since the fertilizer is blown out toward the fertilizer hose 52, the fertilizer that has fallen into the pipe portion 55a is carried into the fertilizer hose 52 by compressed air.

A fertilizer extraction pipe portion 51e is provided on the front side of the feeding case 51a, and a lower end opening of a connecting pipe 51f connected to a lower end opening of the fertilizer extraction pipe portion 51e is formed in a pipe shape. It is fitted in the air-chamber 54. In addition, the fertilizer take-out pipe portion 51e from the feeding case 51a.
The entrance to the inside can be opened and closed by a shutter 51g. The shutter-51g is plate-shaped,
At the position shown in FIG. 8, it is provided so as to be vertically slidable between the feeding roll 51b and the inner wall of the feeding case 51a. When the shutter 51g is pulled up, the shutter 51g closes the inlet into the fertilizer extraction pipe portion 51e, and in this state, the fertilizer is delivered by rotating the delivery roll 51b. Shutter 51
When g is pushed down, the fertilizer withdrawal hole 51h provided in the shutter 51g opens the entrance into the fertilizer withdrawal pipe portion 51e, and the fertilizer remaining in the hopper 50 is removed from the air chamber.
It can be poured into 54. Air-chamber-54
The fertilizer that has flowed down inside is opened by opening the opening 54a on one end side of the air chamber 54 by opening the lid 54b, and operating the blower 53 to blow compressed air from the opening 54c on the other end. It is discharged from the opening 54a on the side and taken out. The lower end portion 51g 'of the shutter 51g is fitted into a shutter fitting portion 55b provided on the front end side of the integral tube portion 55a at the lower part of the funnel portion 55, and the shutter 5
When 1g is pulled upward, the lower end portion 51g 'is also pulled up integrally, and the shutter 51g does not block the flow of the compressed air in the pipe portion 55a. When the shutter 51g is pushed down, the lower end portion 51g 'is also pushed down integrally,
The shutter 51g is in a state of blocking the flow of the compressed air in the pipe portion 55a. Therefore, when the shutter 51g is pushed down to release the fertilizer that has flowed into the air chamber 54 from the air chamber 54 by the compressed air from the blower 53, the pipe portion 55a moves from the air chamber 54. Since the flow of the compressed air to the fertilizer hose 52 is blocked by the shutter lower end portion 51g ', the fertilizer does not flow to the fertilizer hose 52. Further, when the lid 54b of the air-chamber 54 is closed, the shutter 51g slides upward, and the air-chamber-5
It is convenient to have a structure in which the shutter 51g slides downward when the lid 54b of No. 4 is opened.
Further, the erroneous operation of the shutter 51g is eliminated.

When all the fertilizer in the hopper 50 has been taken out as described above, the opening 54a of the air chamber 54 is closed by the lid 54b, and the lid 50 of the hopper 50 is closed.
With b closed and the shutter 51g pushed down, the blower 53 is continuously operated to blow in the compressed air to drive and rotate the feeding rolls 51b. By doing so, the compressed air from the blower-53 causes the fertilizer extraction pipe section 5 to
Blowing through 1e ... into the feeding case 51g,
The blown compressed air is in the feeding case 51g and in the hopper.
Fertilizer hoses 52 through the funnel 55
Blew out from. As a result, the feeding case 51g
The inside of the fertilizer application device 5 can be prevented from being dried by drying the inside and the inside of the hopper 50. In particular, if the inside of the feeding groove 51c of the feeding roll 51b is dried to prevent the fertilizer from adhering to the feeding groove 51c, the amount of fertilizer feeding due to the adhesion of the fertilizer and the rotation resistance of the feeding roll 51b can be reduced. It is possible to prevent the abrasion and damage of the sliding contact portion and the rotating portion due to the increase, and to stabilize the fertilizing performance and extend the product life.

As described above, the feeding device 51 for each strip is ...
The fertilizer remaining in the upper hopper 50 is stored in each shutter 51.
By pushing down g ..., the fertilizer extraction pipe section 51e ...
And, since it can be taken out from one place through the inside of the air chamber 54, it is possible to easily take out the residual fertilizer in the hopper after the work is completed, and after the taking out work, the inside of the feeding case 51g and The inside of the hopper 50 can be dried, the adherence of fertilizer can be prevented, the fertilization performance can be stabilized, and the product life can be extended.

The fertilizer hose 52 is a flexible hose, one end of which is connected to the rear end of the pipe 55a which is integrated with the lower discharge port of the funnel 55, and the other of which is connected. But the groove tool 4
The fertilizer fed by the feeding device 51 is guided to the fertilizer application guide 56 by being connected to the bellows-like connecting member 52a made of rubber which is fitted onto the upper part of the fertilizer application guide 56 on the rear side of the device 7. The air-chamber 54 is a horizontally long pipe, and the mouth 54a on one end side is a lid 54.
It can be opened and closed by b, and the outlet 54c at the other end is connected to the outlet of the blower 53. The compressed air from the blower 53 is blown into the air chamber 54, and is blown into the pipe portions 55a and the fertilizing hoses 52 ... Of each line, and the compressed air blows the fertilizer inside the fertilizing hoses 52. Are forcibly transferred.

The fertilizer application guide 56 is made of an electrically conductive metal plate and has a U-shaped cross section when opened in a plan view.
One body is fixed to each of the floats 45, 46, and 46. Grooving tools 47 having a V-shaped cross section in the left-right direction are fixed to the bottom surface of the bottom of the fertilizer application guides 56, which projects downward from the bottom surface of the float. Also,
A plate 56b for connecting the left and right side wall portions 56a, 56a is formed on the upper portion of the rear opening of the fertilizer application guide 56.
Is stuck.

Further, a cover 57 made of an insulating material, for example, plastic, is attached so as to close the rear opening of the fertilizer application guide 56. In the cover 57, turning engaging portions 57a, 57a are formed on the upper extending portions 57e, 57e on the upper left and right sides, and fixing engaging portions 57b on the lower extending portions 57f, 57f on the lower left and right sides. 57b is formed. The turning engaging portion and the fixing engaging portion are formed in a hemispherical shape on the outside of each of the left and right sides and in a square shape so as to project outward. Fixing engaging parts 57b, 57b on both left and right lower parts
Is disengaged from the fixing engagement holes 56b and 56b provided in the side wall portions 56a and 56a of the fertilizer guide, the cover 57 is
Rotating engaging portions 57a and 57 that engage with rotating engaging holes 56c and 56c provided in the side wall portions 56a and 56a of the fertilizer application guide.
The lower end of the cover can be rotated so as to move rearward by using a as a rotation axis, and the rear side of the fertilizer application guide 56 can be opened. As a result, when mud or the like is clogged in the fertilizer application guide 56, it can be easily removed, and because of the cover 57, the mud intrudes into the fertilizer application guide 56 when moving backward in the grounded state. It is difficult to do.

An electrode plate 58 having a negative potential is attached to the rear side surface of the cover 57 that covers the rear opening of the fertilizer application guide 56. The negative electrode plate 58 is formed of an iron plate in a crank shape in a side view, and a lower end portion 58a thereof is inserted into a cover inner surface side, that is, an inside of the fertilizer application guide 56 from a slit 57c formed in the cover 57. . The lower end portion 58a of the electrode plate that has entered the fertilizer application guide serves as a negative electrode for detecting the clogging of fertilizer in the fertilizer application guide. This electrode plate 58
Has its upper portion tightened and fixed by a bolt 58c, and the end portion of the negative lead wire 58d is also stopped by the bolt 48b, so that the electrode plate 58 is connected to the negative side. The lower end portion 58a of the electrode plate is
It is provided so as to follow the inner surface of the cover, and is installed in the fertilizer application guide 56 in a state where it does not largely project. Also,
The screw hole of the bolt 58c is formed in the screw receiving portion 57d so as not to penetrate inside the cover, and the end of the screw portion of the bolt 58c is not exposed in the fertilizer application guide 56. Further, on the left and right sides of the lower end portion 58a of the electrode plate 58, lower extension portions 57f, 57f formed on the left and right sides of the lower portion of the cover 57 are provided so as to be positioned.
That is, the insulating material (cover 57) is extended on the left and right sides of the electrode (lower end portion 58a of the electrode plate) along the inner surface of the left and right side wall portions 56a, 56a of the fertilizer application guide 56 (lower extending portion 57f).・ 57f) is formed. A portion of the electrode plate 58 located on the rear side surface side of the cover 57 is resin-coated PC, and the lower end portion 58a of the electrode plate 58 is provided.
Is not resin coated.

Further, the end portion of the lead wire 58g on the positive side is screwed to the front side portion 56d of the fertilizer application guide 56,
The fertilizer guide itself has a positive potential. That is, the positive electrode serves as the fertilization guide 56 itself. The fertilization guide 56 itself, which serves as the positive electrode,
The lower end portion 58a of the electrode plate 58 that serves as the negative electrode serves as a fertilizer clogging sensor that detects clogging of fertilizer in the fertilizer application guide 56.

The positive lead wire 58g and the negative lead wire 58d are connected to the fertilizer clogging detection circuit in the controller C. This detection circuit converts the electrical resistance value between the positive side electrode and the negative side electrode into a voltage value, then compares it with the reference voltage value, and outputs a detection signal when the voltage value is lower than that. The lamp LMP is turned on and the buzzer-BEEP sounds.

With the above structure, the upper exposed portion 5 of the electrode plate 58, which is the negative electrode, on the inner surface side of the cover.
8a or the lower exposed part 58b or both exposed parts, and the fertilizer guide 56 itself, which is the positive electrode, over the fertilizer F.
Is deposited and the electrical resistance between both electrodes becomes smaller,
The lamp LMP and the buzzer B are detected when the fertilizer is clogged.
It operates to warn by EEP.

Here, the lower end portion 58a of the electrode plate 58, which is the negative electrode, is provided at a position very close to the fertilization guide 56 itself, which is the positive electrode, but the lower portion of the cover 57. Since the lower extension parts 57f and 57f formed on both left and right sides of the electrode plate are provided on the left and right sides of the electrode plate lower end part 58a, the electrode plate lower end part 58a and the fertilizer application guide 56 are provided. The substantial distance for electrical connection is larger than the distance between the lower end portion 58a of the electrode plate and the fertilization guide side wall portions 56a, 56a in the left-right direction. Therefore, a certain amount of fertilizer adheres and accumulates in the fertilizer application guide 56, and after the fertilizer is in a state where the fertilizer application guide 56 is in a state where the fertilizer is clogged, a signal for detecting the fertilizer obstruction is output. It is possible to prevent erroneous detection such as outputting a detection signal. Further, the electrodes (here, the lower end portion 58a of the electrode plate and the fertilizer application guide 56 itself) provided for detecting the clogging of the fertilizer do not significantly project into the fertilizer application guide 56, and the lower extension portions 57f and 57f are provided with the fertilizer application guides. The fertilizer guide 56 is provided so as to follow the side walls 56a and 56a.
Since it does not largely project into the inside, the electrode 58a and the lower extension portions 57f and 57f provided for detecting the clogging of fertilizer do not conversely induce clogging of the fertilizer in the fertilizer application guide 56.

In the above description, the minus side electrode (lower end portion 58a of the electrode plate) is not projected to the inside of the fertilization guide 56 through the insulating material (cover 57) to the rear side of the fertilization guide 56. It was mounted so as to be exposed, and the insulating material was formed on both the left and right sides of the electrode so as to extend along the inner surfaces of the left and right side wall portions of the fertilizer application guide. As shown in FIG. Is attached to the front side 56d of the fertilizer application guide 56 through the insulating material 57 'so as not to project inside the fertilizer application guide 56 through the insulating material 57'. 57 ′ is formed by extending 57 ′ along the inner surface of the fertilizer application guide 56, and the negative electrode is directly connected to and attached to the fertilizer application guide 56 so that the fertilizer application guide 56 itself is the negative electrode. And the structure It may be done.

Therefore, the fertilizer clogging sensor of the fertilizer application device
, One of the electrodes is connected to the fertilization guide itself, and the other electrode is exposed to the inside of the fertilization guide via an insulating material so as not to directly energize the fertilization guide and is attached so as not to project, and on the left and right sides of the other electrode. By forming the insulating material so as to extend along the inner surfaces of the left and right side walls of the fertilizer application guide, it is possible to accurately detect the fertilizer obstruction after the fertilizer is clogged with fertilizer. Becomes
It is possible to prevent erroneous detection due to a small amount of fertilizer attached.

By the way, in the case of the structure in which the detection of the clogging of the fertilizer in the fertilizer application guide is detected electrically as described above, the positive electrode is more susceptible to electrolytic corrosion. Therefore, if the electrode side having a small surface area is set to the plus side, the electrode is likely to be broken down due to electrolytic corrosion. However, as described above, by using the fertilization guide 56 itself having a large surface area as the positive electrode, the electrode side having a small surface area (here, the electrode plate is used).
The life of the lower end portion 58a) of the boot 58 can be extended, which is economical.

When the fertilizer application guide 56 itself is used as the positive electrode, as shown in FIG.
When the resin coating PC is applied to the upper surface (both inner and outer surfaces) of 6, it is effective in the following points. That is, assuming that the range in which the fertilizer application guide 56 normally floods in the floating ground contact state is A1, at least the fertilizer application guide 56 above the range A1.
The surface is resin-coated PC, and only the lower part A2 of the fertilizer application guide 56, which is not resin-coated and is immersed in normal water, serves as a substantially positive electrode. As a result, the flooded area of the positive electrode becomes constant, the fluctuation of the detection voltage is prevented, and the accuracy of detecting the clogging of the fertilizer is improved.

Therefore, the fertilizer clogging sensor of the fertilizer application device
Is configured to discharge fertilizer from the fertilizer guide into the fertilizer groove formed in the field by the groove making tool, and to detect the fertilizer deposited and accumulated in the fertilizer guide using a pair of electrodes. In the above, one of the electrodes is connected to the fertilization guide itself, and the other electrode is attached to the front side or the rear side of the fertilization guide in an exposed state inside the fertilization guide through an insulating material, and the insulation is provided around the electrode. The material was formed so as to extend along the inner surfaces of the left and right side walls of the fertilizer application guide.

Thus, an electrode or the like provided for detecting the clogging of the fertilizer is provided so as not to induce the clogging of the fertilizer in the fertilizer application guide, so that both electrodes are close to each other. Even if the fertilizer guide is clogged with fertilizer, the clogging of the fertilizer can be accurately detected, and it is possible to prevent erroneous detection due to a small amount of fertilizer attached.

[Brief description of drawings]

FIG. 1 is a side view of a riding rice transplanter with a fertilizer application device.

FIG. 2 is a plan view of a riding rice transplanter with a fertilizer application device.

FIG. 3 is a plan view showing a transmission configuration of a traveling vehicle body and a fertilizer application device.

FIG. 4A is a side view and FIG. 4B is a rear view showing configurations of a fertilizer application guide and a fertilizer clogging sensor.

FIG. 5 is a plan sectional view showing the configurations of a fertilizer application guide and a fertilizer clogging sensor.

FIG. 6 is a perspective view of a cover.

FIG. 7: Fertilizer application guide and fertilizer clogging sensor of another embodiment
FIG. 3 is a plan sectional view showing the configuration of

FIG. 8 is a side sectional view showing a configuration of a main part of the fertilizer application device.

FIG. 9 is a partial front view illustrating a state when taking out fertilizer.

FIG. 10 is a block diagram showing a control configuration of a fertilizer application clutch.

[Explanation of symbols]

 5: Fertilizer application device 47: Grooving tool 56: Fertilizer guide 58: Electrode plate 58a: Electrode plate lower end 57: Cover 57f / 57f: Lower extension

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takashi Suzuki, 1 No. 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture, Technical Department, Iseki Agricultural Machinery Co., Ltd. Inside (72) Inventor Satoru Tokuda 1 Yakura, Tobe Town, Iyo-gun, Ehime Prefecture

Claims (1)

[Claims] 1. A fertilizer is configured to be discharged from the fertilizer guide into a fertilizer trench formed in a field by a grooving tool, and a fertilizer attached and accumulated in the fertilizer guide is detected using a pair of electrodes. In the fertilizer application, one of the electrodes is connected to the fertilizer guide itself, and the other electrode is attached to the front side or the rear side of the fertilizer guide in an exposed state inside the fertilizer guide through an insulating material, and the periphery of the electrode. 2. The fertilizer clogging sensor for a fertilizer application, wherein the insulating material is formed to extend along the inner surfaces of the left and right side walls of the fertilizer application guide.