JP2001232255A - Electrification type sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the multipoint connection of a branch high voltage cord part to a main high voltage cord part and the fitting of an electrification electrode to the main high voltage cord part and the branch high voltage cord part easily in simple structure. SOLUTION: A high voltage cord for supplying high voltage to an electrification electrode 11 is composed of the main high voltage cord part 10a to be connected to a high voltage power source and the branch high voltage cord part 10b one end part of which is arranged close to a prescribed position of the cord part 10a and the other end part of which is connected with the electrode 11, and the main cord part 10a and the branch cord part 10b, in the close arrangement part, are connected electrically and mechanically to each other by conductive fitting 12 which is inserted from a peripheral insulating coated part (P) into an internal conductive wire part Q.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention provides a sprayed fertilizer, agrochemicals and the like (hereinafter referred to as "chemicals") to impart a charge to the cultivated plants and the like. The present invention relates to an electrostatic sprayer.

[0002]

2. Description of the Related Art Conventionally, various electrostatic spraying machines have been proposed in which an electrostatic spraying electrode is arranged in the vicinity of an injection port of a spray nozzle to apply a charge to a chemical solution sprayed from the spray nozzle. . In this electrostatic spraying type sprayer, a chemical solution or the like to be sprayed is supplied with electric charge from the electrostatic applying electrode in a nebulized state and goes out into a free space, so that the atomized chemical solution or the like is sprayed. It has good adhesion to cultivated plants and the like, whereby the effects of controlling and sterilizing pests attached to leaves and the like of the cultivated plants and the like can be enhanced.

[0003] By the way, in the above-mentioned electrostatic spraying machine, the spraying of chemicals and the like can be efficiently performed even on a large farm.
A movable vehicle body has a long nozzle boom provided with a plurality of the spray nozzles at predetermined intervals, and a chemical solution or the like that is pumped from a tank into the nozzle boom by driving a pump during traveling of the vehicle body, It functions to inject from each of the spray nozzles.

In addition, the electrostatic applying electrodes are respectively disposed near the spray nozzles, and a main high voltage cord of a high voltage cord connected to a high voltage DC power supply is provided for each of the electrostatic applying electrodes. A high voltage (for example, 1.5 to 2.0 kV) is supplied from the unit through each of the branch high voltage cord units, and a charge is applied to the spray of the chemical solution or the like from each of the spray nozzles,
The adhesiveness of the chemical solution or the like atomized as described above to a cultivated plant or the like is improved.

[0005]

However, in the above-mentioned conventional electrostatic spraying machine, a plurality of high-voltage cords respectively connected to a high-voltage power supply are individually connected directly to the respective electrostatic applying electrodes. It is more preferable to use a single main high-voltage cord and to connect the branch high-voltage cords to each of the electrostatic applying electrodes from the main high-voltage cord rather than to perform the leakage prevention. However, it is necessary to remove the insulating coating at the connection between the main high-voltage cord and the branch high-voltage cord, and the branch connection structure is complicated and heavy, and the branch connection work becomes complicated, and the cost is increased, There is a problem that the more the number of the electrostatic electrodes is increased, the more such a problem becomes.

On the other hand, in the conventional mounting structure of each of the electrostatic applying electrodes to the main high-voltage cord portion and each of the branch high-voltage cord portions, generally, connection processing is performed by soldering or the like to each cord portion end. Therefore, it is necessary to fix the electrostatic application electrode, and therefore, there is a problem that an assembling structure and an assembling operation are complicated.

The present invention has been made to solve the above-mentioned problems, and the branch connection of the branch high-voltage cord section to the main high-voltage cord section can be quickly performed with a simple configuration while obtaining the desired insulation. It is another object of the present invention to provide an electrostatic spraying device which can perform the above-described operation and can easily attach the electrostatic applying electrode to the main high-voltage cord section and the branch high-voltage cord section with a simple configuration.

[0008]

To achieve the above object,
An electrostatic spraying device according to the present invention is characterized in that a high-voltage cord for supplying a high voltage to each electrostatic-charging electrode includes a main high-voltage cord connected to a high-voltage power supply, and the main high-voltage cord. A branch high-voltage cord portion, one end portion of which is disposed in close proximity to a predetermined portion of the portion, and the other end portion of which is connected to the electrostatic applying electrode. With the voltage cord portion, in each of the close-arranged portions, a conductive metal fitting inserted into each conductive wire portion from the outer insulating coating portion,
They are electrically and mechanically connected.

According to this aspect, one end of the branch high-voltage cord portion is arranged close to the middle of the main high-voltage cord portion,
The conductive metal fittings whose both ends are pointed are pierced from the insulating coating on the outer periphery thereof so as to straddle them, and each end of the conductive metal fitting has a conductive wire portion in the main high voltage cord portion and in the branch high voltage cord portion. At the same time, and by mechanically connecting these two cord portions, the conductive metal fitting electrically connects the conductive wire portions of the two cord portions, and the high voltage from the high voltage power supply is It can be supplied to the electrostatic application electrode. Thereby, the branch connection of the plurality of branch high voltage cords to the main high voltage cord portion can be facilitated and speeded up.

[0010] According to a second aspect of the present invention, there is provided an electrostatic spraying machine according to the first aspect of the present invention, wherein the branch high voltage cord portion is connected to the main high voltage cord portion in the vicinity of the conductive metal fitting. It is covered with an insulating cover from the outside.
According to this aspect, it is possible to prevent the leak due to the adhesion of dust beforehand while protecting the insulation near the conductive fitting and avoiding an electric shock accident.

According to a third aspect of the present invention, in the electrostatic spraying device, the insulating cover may be formed by connecting the vicinity of a connection portion between the main high-voltage cord portion and each of the branch high-voltage cord portions from both sides. It comprises a pair of insulating plastic covers to be sandwiched, and a connecting member for fastening and connecting these plastic covers so as to be pressed against each other. According to this aspect, insulation protection and leakage prevention in the vicinity of the conductive fitting can be performed at a low cost with an extremely simple configuration.

According to a fourth aspect of the present invention, there is provided an electrostatic spraying device, wherein a small diameter portion inserted into the conductive wire portion from the cut surface side of the high voltage cord is provided on the electrode rod constituting the electrostatic applying electrode. It is provided. According to this aspect, the electrical and mechanical connection of the electrostatic applying electrode to the end of the branch high-voltage cord portion or the like can be performed quickly and easily.

According to a fifth aspect of the present invention, in the electrostatic spraying device, the electrostatic spraying electrode is fixed to an electrode mounting member supported by each of the spray nozzles by nut tightening. Things. According to this aspect, the attachment of the electrostatic application electrode to each of the spray nozzle attachment members can be further facilitated and reliable as compared with the related art.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a rear view conceptually showing the whole of the electrostatic spraying type spreader, which is configured by attaching a pair of left and right crawler devices 2 as a traveling device to a body 1. The body 1 has a chemical tank 3 for storing a chemical and the like.
A power supply device 4 including an engine generator and a battery, a pump 5 for pumping the chemical solution and the like, an internal combustion engine 6 as a power source, and the like are mounted.

The machine body 1 includes the chemical liquid tank 3.
A pair of central and collapsible left and right horizontal nozzle booms 8 having a large number of spray nozzles 7 for spraying a chemical solution therein downward along the length direction are attached (in FIG. 1, each nozzle boom is integrally formed). it's shown.). The nozzle boom 8 is supported so as to move up and down with respect to the machine body 1, and its elevation control can be arbitrarily performed by a boom elevation drive device (not shown).

On the other hand, a high voltage cord 10 is connected to the power supply 4. High voltage cord 10 and the Alismataceae voltage code unit 10a, and a plurality of branch high voltage cord portion 10b of which one end portion 10b ₁ as described later with respect to the main high voltage cord portion 10a is branched and connected, consists, At the other end 10b ₂ of the branched high voltage cord portion 10b, the electrostatic applied electrode 1
1 is connected.

The connection structure between the one end 10b ₁ of the main high-voltage cord portion 10a and the respective branch high voltage cord portion 10b is as shown in FIGS. That is, the one end portions 10b ₁ of the plurality of branch high-voltage cord portions 10b are arranged close to (or contact with) the outer periphery of the high-voltage cord portion 10a at regular intervals, and in the close arrangement portion, A U-shaped pin 12 as a conductive metal fitting is inserted from the outer peripheral side of the two cord portions 10a and 10b so as to straddle the two cord portions 10a and 10b. By this insertion, each point 12a, 12b of the U-shaped pin 12 becomes an insulating coating portion (here, a double insulating layer) of the main high-voltage cord portion 10a and the branch high-voltage cord portion 10b. ) Through P to reach the conductive wire portion Q such as a stranded wire. As a result, each of the branch high-voltage cord portions 10b is electrically and mechanically branch-connected to the main high-voltage cord portion 10a.

Further, the branch connection portion is covered with an insulating cover 13 having a lightweight and compact structure to prevent leakage due to exposure of the U-shaped pin 12 and an electric shock accident. The insulating cover 13 is preferably a pair of insulating plastic covers 13 having recesses R and S for accommodating the branch connection portions in a moderately pressed shape.
a and 13b. Therefore, the branch connection portion is accommodated in each of the concave portions R and S, and the insulating plastic covers 13a and 13b are connected to the screws 1 as connection members.
4 by screwing them together, the outlets of the main high-voltage cord portion 10a and the branch high-voltage cord portion 10b in each of the plastic covers 13a and 13b can be squeezed. The main high-voltage cord portion 10a and the branch high-voltage cord portion 10b are kept liquid-tight, the liquid-tightness in each of the recesses R and S is maintained, and it is resistant to wetting. Further, if the screw 14 is removed, maintenance and inspection of the branch connection portion become easy. If necessary, if the insulating cover 13 is coated with an insulating material, its liquid tightness can be further enhanced.

FIG. 4 shows a mounting structure of the electrostatic application electrode 11. First, the electrostatic electrode 11 is formed of an electrode rod 15 having a small-diameter portion 15a having a sharp tip, and an electrode made of an insulating material that covers a portion of the electrode bar 15 excluding the vicinity of the small-diameter portion 15a. And a cover 16. In addition, a screw portion 15b is provided from a portion excluding a predetermined length of the tip portion 15c of the electrode rod 15 to a root portion of the small diameter portion 15a. On the other hand, a screw portion 16a is provided on the outer periphery near the base of the electrode cover 16. The tip surface 16b of the electrode cover 16 is cut in an inclined shape in accordance with the shape of the spray cone MC from the spray nozzle 7 in order to improve drainage and prevent leakage.

A bottomed cylindrical cable end cover 17 is attached to the other end 10b ₂ of the branch high voltage cord portion 10b so as to cover the other end 10b ₂ from the outside. Is provided with a screw hole 17a that can be screwed into the screw portion 15b of the electrode rod 15. Further, the outer periphery of the distal end portion of the cable end cover 17 has a mounting hole 1 formed in an electrode mounting plate 18 as an electrode mounting member.
8a. The electrode mounting plate 18 is fixed to the spray nozzle 7 and, therefore, the branch high-voltage cord 10 held by the cable end cover 17.
b is supported on the nozzle boom 8 via the spray nozzle 7.

Further, the small-diameter portion 15 of the electrode rod 15
a, by screwing the screw portion 15b in the screw hole 17a of the cable end cover 17, from the cut surface 10b ₃ side of the branch High voltage cable section 10b, is inserted (press-fitted) to the conductive wire portion Q ing. At the time of this insertion, a part of the screw portion 16a of the electrode cover 16
The screw hole 17 formed in the cable end cover 17
As shown, it is fitted or screwed into a fitting hole 17b provided so as to communicate with a. And the fitting hole 1
By screwing the nut 19 into the screw portion 17c formed on the outer peripheral portion of the electrode 7b, the electrostatic applying electrode 11 is reliably and stably held on the electrode mounting plate 18. 4 of FIG.
Reference numeral 0 denotes a heat-shrinkable tube made of an insulating material coated on the outer periphery of the branch high-voltage cord portion 10b and the cable end cover 17 so that water and the like do not enter the gap between the cable end cover 17 and the cable end cover 17.

The above-mentioned electrostatic applying electrode 11 is connected to the cable end cover 17 via the cable end cover 17 attached to the electrode mounting plate 18 as described above. The small-diameter portion 15a is attached to the branch high-voltage cable 10b holding the surface 10b ₃ side.
Then, the nut 19 is screwed into the screw portion 17c of the cable end cover 17 by a simple operation, and the nozzle boom 8 and the spray nozzle 7 are joined together.
Can be supported.

Note that, without using the branch high-voltage cable 10b, the small-diameter portion 15a of the electrode rod 15 can be
The main high-voltage cable 10a can be inserted and held at a predetermined position.

[0024]

As described above, according to the present invention, the main high-voltage cord section connected to the high-voltage power supply, one end of each of the main high-voltage cord sections is arranged at a predetermined position, and A branch high-voltage code portion to which the electrostatic application electrode 11 is connected to the other end, respectively, and the main high-voltage code portion and each of the branch high-voltage code portions are arranged at the outer periphery in each of the close arrangement portions. The conductive metal fittings inserted into the respective conductive wire portions from the insulating coating portion are electrically and mechanically connected, so that the insulating coating of the main high-voltage cord portion is removed and each of the main high-voltage cord portions is removed at a plurality of locations. The connection of the plurality of branch high-voltage cords to the main high-voltage cord can be performed easily and quickly without performing inefficient work such as twisting and welding one branch high-voltage cord. The advantage that it can be implemented mechanically reliably That.

Further, according to one embodiment of the present invention, the vicinity of a portion where the branch high voltage cord portion is connected to the main high voltage cord portion by the conductive metal fitting is covered with an insulating cover from the outside. As a result, it is possible to effectively avoid electric shock accidents and leaks caused by the conductive metal fittings. Is composed of a pair of insulating plastic covers sandwiching from both sides, and these insulating plastic covers are tightened and connected by a connecting member so that they are in close contact with each other, so that the effect of being able to provide an insulating structure easily and at low cost is provided. can get.

Further, according to another embodiment of the present invention, the small-diameter portion inserted into the conductive wire portion from the cut surface side of the high-voltage cord is inserted into the electrode rod constituting the electrostatic application electrode. Is provided, the mechanical attachment and electrical connection of the electrostatic application electrode to the conductive line portion of the high-voltage cord can be performed easily and quickly. Further, by fixing the electrostatic application electrode to a mounting member of the spray nozzle by tightening a nut,
The advantage is obtained that the electrostatic electrode can be arranged and stably held in the vicinity of the spray nozzle, and the condition for adding a charge to the spray liquid from the spray nozzle can be optimally adjusted.

[Brief description of the drawings]

FIG. 1 is a rear view conceptually showing the entirety of an electrostatic sprayer according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part showing a connection structure between a main high-voltage cable and a branch high-voltage cable in FIG. 1;

FIG. 3 is a sectional view taken along the line III-III of FIG. 2;

FIG. 4 is an enlarged view showing a main part of the mounting structure of the electrostatic application electrode in FIG.

[Explanation of symbols]

4 High Voltage Power Supply 7 Spray Nozzle 10 High Voltage Cord 10a Main High Voltage Cord 10b Branch High Voltage Cord 10b ₁ One End 10b ₂ Other End 10b ₃ Cut Surface 11 Electrostatic Electrode 12 Conductive Bracket (U-shaped Pin) 13 Insulating cover 13a, 13b Plastic cover 14 Connecting member (screw) 15 Electrode rod 15a Small diameter portion 18 Electrode mounting plate (mounting member) 19 Nut P Insulating coating portion Q Conducting wire portion

Continued on the front page (72) Inventor Tetsuo Ono 678-1 Tomioka, Toyota-machi, Iwata-gun, Shizuoka Prefecture Inside the Agricultural Experiment Station in Shizuoka Prefecture (72) Inventor Shun Yamane 1-678-1, Tomioka, Toyota-machi, Toyota-machi in Iwata-gun, Shizuoka Prefecture F in the Shizuoka Agricultural Experiment Station Terms (reference) 4D074 AA05 BB06 CC04 CC24 CC51 4F034 AA10 BB14 BB16

Claims (5)

[Claims] An electric charge from an electrostatic electrode (11) arranged for each of the spray nozzles (7) is applied to a chemical or the like ejected from a plurality of spray nozzles (7), so that the chemical or the like is discharged. A high voltage cord (10) for supplying a high voltage to each of said electrostatic applying electrodes (11) in an electrostatic applying type spraying machine for spraying.
A main high-voltage cord (10a) connected to a high-voltage power supply (4), and one end (10b ₁ ) disposed at a predetermined position of the main high-voltage cord (10a), A high voltage cord section (10b), to which the electrostatic application electrode (11) is connected to the section (10b ₂ ).
The main high-voltage cord portion (10a) and each of the branch high-voltage cord portions (10b) are inserted from the outer peripheral insulating coating portion (P) to the inner conductive wire portion (Q) in each of the adjacently disposed portions. An electrostatic spraying device, wherein the spraying device is electrically and mechanically connected by a conductive metal fitting (12). 2. The branch high voltage cord section (10b) is connected to the conductive metal fitting (1) with respect to the main high voltage cord section (10).
Insulation cover (1) near the part connected in 2)
The electrostatic sprayer according to claim 1, wherein the sprayer is coated with (3). 3. The insulative cover (13) includes a main high-voltage cord (10a) and each of the branch high-voltage cords (1).
A pair of insulating plastic covers (13a) and (13b) sandwiching the vicinity of the connection with the connector 0b) so as to seal them from both sides.
And these plastic covers (13a), (13)
3. An electrostatic spraying machine according to claim 2, comprising a connecting member (14) for tightening and connecting said b) to each other in close contact with each other. 4. An electric charge from an electrostatic applying electrode (11) disposed opposite to each of said spray nozzles (7) is applied to a chemical or the like ejected from a plurality of spray nozzles (7), and the chemical or the like is applied. The electrode rod (15) constituting the electrostatic electrode (11) is electrically connected to the conductive wire portion (Q) from the cut surface (10b ₃ ) side of the high voltage cord (10). )
An electrostatic sprayer having a small-diameter portion (15a) inserted therein. 5. The electrostatic applying electrode (11) is fixed to an electrode mounting member (18) supported by the spray nozzle (7) by tightening a nut (19). 3. The electrostatic spraying machine according to 1.