JP2018167219A - Electrostatic spray nozzle and electrostatic spray device - Google Patents

Electrostatic spray nozzle and electrostatic spray device Download PDF

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JP2018167219A
JP2018167219A JP2017068354A JP2017068354A JP2018167219A JP 2018167219 A JP2018167219 A JP 2018167219A JP 2017068354 A JP2017068354 A JP 2017068354A JP 2017068354 A JP2017068354 A JP 2017068354A JP 2018167219 A JP2018167219 A JP 2018167219A
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electrode
electrostatic spray
waterproof
spraying
waterproof member
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JP6835356B2 (en
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忍 穴口
Shinobu Anaguchi
忍 穴口
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Arimitsu Industry Co Ltd
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Arimitsu Industry Co Ltd
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Insects & Arthropods (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Catching Or Destruction (AREA)

Abstract

To provide an electrostatic spray nozzle and an electrostatic spray device capable of preventing the occurrence of a failure accompanying with the replacement of a component and reducing a component replaced wastefully.SOLUTION: An electrostatic spray nozzle 2 for spraying a charged liquid comprises: a nozzle body 21 spraying the liquid; an annular electrode 22 which is disposed around the liquid sprayed from the nozzle body 21 and whose axis length direction is arranged along a spraying direction of the liquid; an annular waterproof member 23 being buried with the electrode 22 and insulating and waterproofing the electrode 22; a connection terminal 222 projected from the electrode 22 so that a tip part is exposed to the outside of the waterproof member 23; and a holding member 24 having an insulation property and waterproofness, being attached to the nozzle body 21 and holding the waterproof member 23.SELECTED DRAWING: Figure 3

Description

本発明は、帯電した液体を散布するための静電散布ノズル及び静電散布装置に関する。   The present invention relates to an electrostatic spray nozzle and an electrostatic spray device for spraying a charged liquid.

従来、帯電した液状の農薬（液体）を圃場に散布するために、静電散布ノズルが用いられる（例えば特許文献１参照）。特許文献１に記載の静電散布ノズルは、ノズル本体と電極とを備える。ノズル本体は農薬を噴霧する。電極は筒状（環状）をなし、ノズル本体から噴霧された農薬を取り囲む。電極に高電圧が印加された場合、ノズル本体から噴霧された農薬は、電極に印加された電圧の極性とは逆の極性に帯電する。帯電した農薬は、静電効果により、圃場に植えられた作物にムラなく付着する。   Conventionally, an electrostatic spray nozzle is used to spray a charged liquid agricultural chemical (liquid) on a field (see, for example, Patent Document 1). The electrostatic spray nozzle described in Patent Document 1 includes a nozzle body and an electrode. The nozzle body sprays pesticides. The electrode is cylindrical (annular) and surrounds the pesticide sprayed from the nozzle body. When a high voltage is applied to the electrode, the pesticide sprayed from the nozzle body is charged with a polarity opposite to the polarity of the voltage applied to the electrode. The charged pesticide adheres uniformly to the crops planted in the field due to the electrostatic effect.

特許文献１に記載の静電散布ノズルは、絶縁性及び防水性を有するカバーを更に備える。
第１の態様のカバーは、各筒状のカバー本体と先端キャップとを備える。カバー本体は、ノズル本体を取り囲むようにしてノズル本体に取り付けられる。カバー本体には挿入孔が設けられている。カバー本体に先端キャップが外嵌めされることによって、挿入孔の一端部に連通する収容室がカバー本体と先端キャップとの間に形成される。収容室には、挿入孔に挿入されている電線に接続された電極が収容される。収容室を密閉するために、Ｏリングがカバー本体と先端キャップとの間に配され、電線が貫通している止水プラグが挿入孔の他端部に嵌め込まれる。以上の結果、電極は絶縁及び防水される。 The electrostatic spray nozzle described in Patent Document 1 further includes a cover having insulating properties and waterproof properties.
The cover according to the first aspect includes each cylindrical cover body and a tip cap. The cover body is attached to the nozzle body so as to surround the nozzle body. An insertion hole is provided in the cover body. When the front end cap is fitted on the cover body, a storage chamber communicating with one end of the insertion hole is formed between the cover main body and the front end cap. The accommodation chamber accommodates an electrode connected to the electric wire inserted into the insertion hole. In order to seal the storage chamber, an O-ring is disposed between the cover main body and the tip cap, and a water stop plug through which the electric wire passes is fitted into the other end of the insertion hole. As a result, the electrode is insulated and waterproof.

第２の態様のカバーは筒状をなし、ノズル本体を取り囲むようにしてノズル本体に取り付けられる。電極及び電線の電極に接続されている部分は、モールド成形によってカバーに埋め込まれている。この結果、電極は絶縁及び防水される。   The cover according to the second aspect has a cylindrical shape and is attached to the nozzle body so as to surround the nozzle body. The part connected to the electrode and the electrode of the electric wire is embedded in the cover by molding. As a result, the electrode is insulated and waterproof.

特開２００６−０９５３５７号公報JP 2006-095357 A

第１の態様の場合、ノズル本体、電極、カバー本体、先端キャップ、電線、Ｏリング、及び止水プラグが別体なので、これらの何れかが劣化したとき、静電散布ノズルを分解すれば、劣化した部品を個別に交換することができる。
しかしながら、分解した静電散布ノズルを組み立て直した場合、Ｏリングの取り付け忘れによって、電極の絶縁及び防水が不完全になる虞がある。ところが、Ｏリングはカバー本体と先端キャップとに覆われるので、Ｏリングの取り付け忘れは気付かれ難い。また、劣化したＯリングが、所定の絶縁性及び防水性を有していないＯリングに交換された場合、漏電又は静電効果の不足等の不具合が起こる虞がある。 In the case of the first aspect, since the nozzle body, the electrode, the cover body, the tip cap, the electric wire, the O-ring, and the water stop plug are separated, when any of these deteriorates, if the electrostatic spray nozzle is disassembled, Deteriorated parts can be replaced individually.
However, when the disassembled electrostatic spray nozzle is reassembled, there is a risk that the insulation and waterproofing of the electrode will be incomplete due to forgetting to install the O-ring. However, since the O-ring is covered with the cover body and the tip cap, it is difficult to notice that the O-ring is forgotten to be attached. In addition, when the deteriorated O-ring is replaced with an O-ring that does not have a predetermined insulating property and waterproof property, there is a possibility that problems such as leakage or insufficient electrostatic effect may occur.

一方、第２の態様の場合、電極、カバー、及び電線が一体化されている。故に、これらの何れかが劣化したときでも、電極、カバー、及び電線の全てを交換する必要があるので、無駄に交換される部品が多い。   On the other hand, in the case of the 2nd mode, an electrode, a cover, and an electric wire are integrated. Therefore, even when any one of these deteriorates, it is necessary to replace all of the electrodes, the cover, and the electric wires, so there are many parts that are replaced in vain.

本発明は斯かる事情に鑑みてなされたものであり、その主たる目的は、部品の交換に伴う不具合の発生を防止することができ、無駄に交換される部品を削減することができる静電散布ノズル及び静電散布装置を提供することにある。   The present invention has been made in view of such circumstances, and a main object of the present invention is to provide an electrostatic spraying device that can prevent the occurrence of problems associated with the replacement of parts and reduce the number of parts that are wasted. To provide a nozzle and an electrostatic spraying device.

本実施の形態に係る静電散布ノズルは、帯電した液体を散布するための静電散布ノズルにおいて、液体を噴霧するノズル本体と、該ノズル本体から噴霧される液体の周囲に配され、軸長方向が前記液体の噴霧方向に沿う環状の電極と、該電極が埋め込まれ、該電極を絶縁し防水する環状の防水部材と、先端部が前記防水部材の外部に露出するように前記電極から突出する接続端子と、絶縁性及び防水性を有し、前記ノズル本体に取り付けられ、前記防水部材を保持する保持部材とを備えることを特徴とする。   The electrostatic spray nozzle according to the present embodiment is an electrostatic spray nozzle for spraying a charged liquid, and is arranged around a nozzle body spraying the liquid and the liquid sprayed from the nozzle body, and has an axial length. An annular electrode that follows the spray direction of the liquid, an annular waterproof member that is embedded and insulates and waterproofs the electrode, and a tip projecting from the electrode so that the tip is exposed to the outside of the waterproof member And a holding member that has an insulating property and a waterproof property, is attached to the nozzle body, and holds the waterproof member.

本実施の形態に係る静電散布ノズルは、前記防水部材は合成ゴム製又は合成樹脂製であり、前記電極と前記防水部材とはインサート成形によって一体化されていることを特徴とする。   The electrostatic spray nozzle according to the present embodiment is characterized in that the waterproof member is made of synthetic rubber or synthetic resin, and the electrode and the waterproof member are integrated by insert molding.

本実施の形態に係る静電散布ノズルは、前記電極は、軸長方向の中途が屈曲していることを特徴とする。   The electrostatic spray nozzle according to the present embodiment is characterized in that the electrode is bent midway in the axial direction.

本実施の形態に係る静電散布ノズルは、前記保持部材は、軸長方向が前記噴霧方向に沿い、前記ノズル本体を取り囲むようにして該ノズル本体に取り付けられる筒状部と、軸長方向が前記噴霧方向に沿い、前記筒状部の外周面に設けられ、前記接続端子が前記噴霧方向の下流側の開口から挿入されることによって前記接続端子を収容する筒状の収容部と、該収容部の前記噴霧方向の上流側の開口を液密に封止する封止部材とを有し、前記防水部材には、前記噴霧方向とは逆方向に前記防水部材から突出し、前記接続端子が貫通し、前記収容部の前記下流側の開口に嵌め込まれることによって該下流側の開口を液密に封止する封止栓が突設され、前記防水部材は、前記封止栓が前記下流側の開口に嵌め込まれることによって、前記保持部材に保持されることを特徴とする。   In the electrostatic spray nozzle according to the present embodiment, the holding member has a cylindrical portion attached to the nozzle body so that the axial length direction is along the spray direction and surrounds the nozzle main body, and the axial length direction is A cylindrical accommodation part that is provided on the outer peripheral surface of the cylindrical part along the spraying direction and that accommodates the connection terminal by inserting the connection terminal from an opening on the downstream side of the spraying direction, and the accommodation A sealing member that liquid-tightly seals an opening on the upstream side of the spraying direction of the portion, the waterproofing member projects from the waterproofing member in a direction opposite to the spraying direction, and the connection terminal penetrates And a sealing plug that liquid-tightly seals the downstream opening by being fitted into the downstream opening of the housing portion, and the waterproof member has the sealing plug on the downstream side. By fitting into the opening, Is the fact characterized.

本実施の形態に係る静電散布ノズルは、前記封止栓の前記下流側の開口からの抜脱を防止する抜け止めを更に備え、該抜け止め及び前記保持部材夫々に、互いに係合する係合部が設けられており、該係合部同士の係合によって前記抜け止めが前記保持部材に保持されていることを特徴とする。   The electrostatic spray nozzle according to the present embodiment further includes a stopper that prevents the sealing plug from being pulled out from the opening on the downstream side, and the stopper and the holding member are engaged with each other. A joining portion is provided, and the retaining member is held by the holding member by engagement between the engaging portions.

本実施の形態に係る静電散布装置は、帯電した液体を散布する静電散布装置において、本実施の形態に係る静電散布ノズルと、該静電散布ノズルが備えるノズル本体に液体を圧送するポンプと、前記静電散布ノズルが備える接続端子の先端部に接続される電線と、該電線を介して、前記静電散布ノズルが備える電極を帯電させる電源とを備えることを特徴とする。   The electrostatic spraying device according to the present embodiment, in the electrostatic spraying device that sprays charged liquid, pumps the liquid to the electrostatic spraying nozzle according to the present embodiment and the nozzle body included in the electrostatic spraying nozzle. A pump, an electric wire connected to a tip portion of a connection terminal provided in the electrostatic spray nozzle, and a power source for charging an electrode provided in the electrostatic spray nozzle through the electric wire.

本実施の形態にあっては、電極が防水部材に埋め込まれている。つまり、電極と防水部材とは一体化されている。防水部材によって、電極は外部から絶縁され、防水される。
静電散布ノズルを組み立てる場合には、電極及び防水部材の取り付けが同時的に行なわれる。故に、電極及び防水部材の何れか一方のみを取り付け忘れる虞はない。電極及び防水部材の取り付けが行なわれなかったときには、静電効果が得られない。故に、電極及び防水部の取り付け忘れに容易に気づくことができる。また、防水部材を、他の防水部材に交換することはできない。故に、劣化した防水部材が、所定の性質を有していない防水部材に交換される虞はない。
以上の結果、部品の交換に伴う不具合の発生を防止することができる。 In the present embodiment, the electrode is embedded in the waterproof member. That is, the electrode and the waterproof member are integrated. The electrode is insulated from the outside and waterproofed by the waterproof member.
When assembling the electrostatic spray nozzle, the electrode and the waterproof member are attached simultaneously. Therefore, there is no possibility of forgetting to attach only one of the electrode and the waterproof member. When the electrode and the waterproof member are not attached, the electrostatic effect cannot be obtained. Therefore, it is possible to easily notice that the electrodes and the waterproof part are forgotten to be attached. Further, the waterproof member cannot be replaced with another waterproof member. Therefore, there is no possibility that the deteriorated waterproof member is replaced with a waterproof member having no predetermined property.
As a result of the above, it is possible to prevent the occurrence of problems associated with component replacement.

ノズル本体と、一体化された電極及び防水部材と、保持部材とは互いに別体である。本実施の形態に係る静電散布ノズルを備える静電散布装置の場合、電極の接続端子と電線とが防水部材の外部で接続される。故に、ノズル本体の交換、一体化された電極及び防水部材の交換、保持部材の交換、並びに電線の交換を個別に行なうことができる。従って、無駄に交換される部品を削減することができる。   The nozzle body, the integrated electrode and waterproof member, and the holding member are separate from each other. In the case of the electrostatic spraying device provided with the electrostatic spraying nozzle according to the present embodiment, the electrode connection terminal and the electric wire are connected outside the waterproof member. Therefore, replacement of the nozzle body, replacement of the integrated electrode and waterproof member, replacement of the holding member, and replacement of the electric wire can be performed individually. Therefore, it is possible to reduce parts that are replaced in vain.

本実施の形態にあっては、インサート成形によって、一体化された電極と防水部材とを容易に得ることができる。   In the present embodiment, an integrated electrode and a waterproof member can be easily obtained by insert molding.

本実施の形態にあっては、電極の軸長方向の中途が屈曲しているので、電極の強度を向上させることができる。   In this embodiment, since the middle of the electrode in the axial direction is bent, the strength of the electrode can be improved.

本実施の形態にあっては、電極が筒状の収容部に収容されている。筒状部の両端開口は、封止部材及び防水部材の封止栓によって液密に封止されている。故に、接続端子を絶縁及び防水することができる。
また、封止栓による収容部の開口の封止と、保持部材への防水部材の取り付けとを同時に行なうことができる。 In the present embodiment, the electrode is accommodated in the cylindrical accommodating portion. Both end openings of the cylindrical portion are liquid-tightly sealed by sealing plugs of a sealing member and a waterproof member. Therefore, the connection terminal can be insulated and waterproofed.
Moreover, sealing of the opening of the accommodating part by the sealing plug and attachment of the waterproof member to the holding member can be performed simultaneously.

本実施の形態にあっては、保持部材の係合部と抜け止めの係合部との係合によって、抜け止めを保持部材に容易に取り付けることができる。また、防水部材の封止栓が収容部の開口から抜け出ることを抜け止めが防止するので、保持部材が防水部材を保持する強度を向上させることができる。   In the present embodiment, the retaining member can be easily attached to the retaining member by the engagement between the engaging portion of the holding member and the retaining portion. In addition, since the stopper preventing the sealing plug of the waterproof member from coming out of the opening of the housing portion is prevented, the strength with which the holding member holds the waterproof member can be improved.

本実施の形態の静電散布ノズル及び静電散布装置による場合、部品の交換に伴う不具合の発生を防止することができる。また、無駄に交換される部品を削減することができる。   In the case of the electrostatic spray nozzle and electrostatic spray device of the present embodiment, it is possible to prevent the occurrence of problems associated with component replacement. In addition, it is possible to reduce parts that are replaced in vain.

実施の形態に係る静電散布装置の要部の構成を模式的に示すブロック図である。It is a block diagram which shows typically the structure of the principal part of the electrostatic spraying apparatus which concerns on embodiment. 静電散布装置が備える静電散布ノズルを示す斜視図である。It is a perspective view which shows the electrostatic spraying nozzle with which an electrostatic spraying apparatus is provided. 静電散布ノズルを示す断面図である。It is sectional drawing which shows an electrostatic spray nozzle. 静電散布ノズルが備える電極及び防水部材を示す斜視図である。It is a perspective view which shows the electrode and waterproof member with which an electrostatic spray nozzle is provided.

以下、本発明を、その実施の形態を示す図面に基づいて詳述する。   Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.

図１は、実施の形態に係る静電散布装置の構成を模式的に示すブロック図である。
図中１は静電散布装置であり、静電散布装置１は、静電散布ノズル２、ポンプ３、及び電源４を備えている。図１には静電散布ノズル２の斜視図が含まれている。
図２は、静電散布装置１が備える静電散布ノズル２を示す斜視図である。図１の斜視図と図２の斜視図とは、後述するように視点が異なる。
図３は、静電散布ノズル２を示す断面図である。
図１〜図３にしめすように、静電散布ノズル２は、ノズル本体２１、電極２２、防水部材２３、及び保持部材２４を備える。 FIG. 1 is a block diagram schematically showing the configuration of the electrostatic spraying device according to the embodiment.
In the figure, reference numeral 1 denotes an electrostatic spraying device, and the electrostatic spraying device 1 includes an electrostatic spraying nozzle 2, a pump 3, and a power source 4. FIG. 1 includes a perspective view of the electrostatic spray nozzle 2.
FIG. 2 is a perspective view showing the electrostatic spray nozzle 2 provided in the electrostatic spray device 1. The perspective view of FIG. 1 and the perspective view of FIG. 2 have different viewpoints as will be described later.
FIG. 3 is a cross-sectional view showing the electrostatic spray nozzle 2.
As shown in FIGS. 1 to 3, the electrostatic spray nozzle 2 includes a nozzle body 21, an electrode 22, a waterproof member 23, and a holding member 24.

ノズル本体２１は筒状をなす。ノズル本体２１は、給水管３１に連結される基端部と、噴霧口２１１が設けられた先端部とを備える。給水管３１を通ってノズル本体２１に送られた液体（例えば液状の農薬）は、ノズル本体２１の基端部から先端部に向けてノズル本体２１の内部を通り、噴霧口２１１から噴霧される。
図１は静電散布ノズル２をノズル本体２１の基端部側から見た斜視図を含む。図２は、静電散布ノズル２をノズル本体２１の先端部側から見た斜視図である。
ノズル本体２１からの液体の噴霧方向は、ノズル本体２１の軸長方向に沿って噴霧口２１１から離隔する方向である。噴霧口２１１が下向きである場合、噴霧方向は下方向である。 The nozzle body 21 has a cylindrical shape. The nozzle body 21 includes a proximal end portion connected to the water supply pipe 31 and a distal end portion provided with a spray port 211. The liquid (for example, liquid agrochemical) sent to the nozzle body 21 through the water supply pipe 31 passes through the nozzle body 21 from the proximal end portion to the distal end portion of the nozzle body 21 and is sprayed from the spray port 211. .
FIG. 1 includes a perspective view of the electrostatic spray nozzle 2 as viewed from the base end side of the nozzle body 21. FIG. 2 is a perspective view of the electrostatic spray nozzle 2 as viewed from the tip end side of the nozzle body 21.
The spray direction of the liquid from the nozzle body 21 is a direction away from the spray port 211 along the axial length direction of the nozzle body 21. When the spray port 211 is downward, the spray direction is downward.

図４は、静電散布ノズル２が備える電極２２及び防水部材２３を示す斜視図である。
図３及び図４に示す電極２２は導電性を有し、例えば金属製である。電極２２は、環状部２２１及び２つの接続端子２２２，２２２を備える。
環状部２２１は、軸長方向の中途が屈曲している。具体的には、環状部２２１は、Ｌ字状の断面を有する円環状をなす。更に詳細には、環状部２２１の断面は、軸長方向に長く、径方向に短い矩形が軸長方向の中途で９０°に外向きに屈曲したような形状をなす。
各接続端子２２２は、環状部２２１の最外周部から軸長方向に突出している。接続端子２２２は矩形片状をなし、突出方向に細長い。接続端子２２２，２２２夫々の突出方向は、互いに同じ向きである。接続端子２２２，２２２は、環状部２２１の周方向に１８０°互いに離隔している。 FIG. 4 is a perspective view showing the electrode 22 and the waterproof member 23 provided in the electrostatic spray nozzle 2.
The electrode 22 shown in FIG.3 and FIG.4 has electroconductivity, for example, is metal. The electrode 22 includes an annular portion 221 and two connection terminals 222 and 222.
The annular portion 221 is bent halfway in the axial direction. Specifically, the annular portion 221 has an annular shape having an L-shaped cross section. More specifically, the cross section of the annular portion 221 has a shape in which a rectangle that is long in the axial length direction and short in the radial direction is bent outward at 90 ° in the middle of the axial length direction.
Each connection terminal 222 protrudes from the outermost peripheral portion of the annular portion 221 in the axial length direction. The connection terminal 222 has a rectangular piece shape and is elongated in the protruding direction. The protruding directions of the connection terminals 222 and 222 are the same as each other. The connection terminals 222 and 222 are separated from each other by 180 ° in the circumferential direction of the annular portion 221.

図２〜図４に示す防水部材２３は、絶縁性及び防水性を有し、例えば合成ゴム製又は合成樹脂製である。防水部材２３は、環状部２３１及び封止栓２３２，２３２を備える。
環状部２３１は円環状をなす。環状部２３１には電極２２の環状部２２１が同軸に埋め込まれている。環状部２３１の内径は、ノズル本体２１の外径よりも大きい。 The waterproof member 23 shown in FIGS. 2 to 4 has insulating properties and waterproof properties, and is made of, for example, synthetic rubber or synthetic resin. The waterproof member 23 includes an annular portion 231 and sealing plugs 232 and 232.
The annular portion 231 has an annular shape. An annular portion 221 of the electrode 22 is coaxially embedded in the annular portion 231. The inner diameter of the annular portion 231 is larger than the outer diameter of the nozzle body 21.

各封止栓２３２は円柱状をなす。封止栓２３２は、環状部２３１から軸長方向に突出している。封止栓２３２の周面には、夫々適宜の弾性を有する複数の鍔が軸長方向に並設されている。封止栓２３２，２３２夫々の突出方向は、互いに同じ向きである。電極２２の接続端子２２２，２２２は封止栓２３２，２３２の軸心を貫通して封止栓２３２，２３２から突出している。即ち、接続端子２２２，２２２夫々の先端部は、防水部材２３の外部に露出している。
電極２２の防水部材２３に埋め込まれている部分は絶縁及び防水される。 Each sealing plug 232 has a cylindrical shape. The sealing plug 232 protrudes from the annular portion 231 in the axial length direction. On the peripheral surface of the sealing plug 232, a plurality of ridges each having appropriate elasticity are arranged in parallel in the axial length direction. The protruding directions of the sealing plugs 232 and 232 are the same as each other. The connection terminals 222 and 222 of the electrode 22 project from the sealing plugs 232 and 232 through the shaft centers of the sealing plugs 232 and 232. That is, the front ends of the connection terminals 222 and 222 are exposed to the outside of the waterproof member 23.
The portion embedded in the waterproof member 23 of the electrode 22 is insulated and waterproof.

電極２２と防水部材２３とは、インサート成形によって一体化されている。防水部材２３の金型に電極２２が挿入され、次いでこの金型に合成ゴム又は合成樹脂が注入されることによって、一体化された電極２２と防水部材２３とを容易に得ることができる。電極２２と防水部材２３とは一体化されているので、例えば人間が電極２２の接続端子２２２を摘まんで電極２２を防水部材２３から抜脱することはできない。   The electrode 22 and the waterproof member 23 are integrated by insert molding. The electrode 22 is inserted into the mold of the waterproof member 23, and then synthetic rubber or synthetic resin is injected into the mold, whereby the integrated electrode 22 and the waterproof member 23 can be easily obtained. Since the electrode 22 and the waterproof member 23 are integrated, for example, a human cannot pick up the connection terminal 222 of the electrode 22 and remove the electrode 22 from the waterproof member 23.

ここで、電極２２の環状部２３１が屈曲している理由を説明する。環状部２３１の屈曲により、電極２２の強度を向上させることができる。故に、インサート成形を行なう場合に、金型に注入された合成ゴム又は合成樹脂の圧力によって、環状部２３１が変形したり環状部２３１の配置位置がずれたりすることが抑制される。   Here, the reason why the annular portion 231 of the electrode 22 is bent will be described. By bending the annular portion 231, the strength of the electrode 22 can be improved. Therefore, when insert molding is performed, deformation of the annular portion 231 or displacement of the arrangement position of the annular portion 231 due to the pressure of the synthetic rubber or synthetic resin injected into the mold is suppressed.

図１〜図３に示す保持部材２４は絶縁性及び防水性を有し、例えば合成樹脂製である。保持部材２４は筒状部２４１及び収容部２４２，２４２を備える。
筒状部２４１は円筒状をなす。筒状部２４１の内径は、防水部材２３の環状部２３１の内径と同程度である。 The holding member 24 shown in FIGS. 1 to 3 has an insulating property and a waterproof property, and is made of, for example, a synthetic resin. The holding member 24 includes a cylindrical portion 241 and storage portions 242 and 242.
The cylindrical part 241 has a cylindrical shape. The inner diameter of the cylindrical portion 241 is approximately the same as the inner diameter of the annular portion 231 of the waterproof member 23.

収容部２４２，２４２は、筒状部２４１の周方向に１８０°互いに離隔している。各収容部２４２は円筒状をなす。収容部２４２の内径は、防水部材２３の封止栓２３２の外径と同程度である。収容部２４２の軸長方向は筒状部２４１の軸長方向に沿う。収容部２４２は、収容部２４２の軸長方向の一端部が筒状部２４１の軸長方向の一端部に一致するようにして、筒状部２４１の外周面に一体に設けられている。収容部２４２の軸長方向の他端部は、筒状部２４１の軸長方向の他端部から突出する。以下では、保持部材２４の軸長方向の収容部２４２，２４２が突出している側を基端側といい、保持部材２４の軸長方向の基端側の逆側を先端方向という。後述するように保持部材２４がノズル本体２１に取り付けられた場合、基端側は噴霧方向の上流側であり、先端側は噴霧方向の下流側である。   The accommodating portions 242 and 242 are separated from each other by 180 ° in the circumferential direction of the cylindrical portion 241. Each accommodating portion 242 has a cylindrical shape. The inner diameter of the housing portion 242 is approximately the same as the outer diameter of the sealing plug 232 of the waterproof member 23. The axial length direction of the accommodating portion 242 is along the axial length direction of the cylindrical portion 241. The housing portion 242 is integrally provided on the outer peripheral surface of the tubular portion 241 such that one end portion in the axial length direction of the housing portion 242 coincides with one end portion in the axial length direction of the tubular portion 241. The other end portion in the axial length direction of the housing portion 242 protrudes from the other end portion in the axial length direction of the cylindrical portion 241. Hereinafter, the side from which the holding portions 242, 242 in the axial length direction of the holding member 24 protrude is referred to as a base end side, and the opposite side of the base end side in the axial length direction of the holding member 24 is referred to as a front end direction. As will be described later, when the holding member 24 is attached to the nozzle body 21, the proximal end side is the upstream side in the spraying direction, and the distal end side is the downstream side in the spraying direction.

図１〜図３に示すように、静電散布装置１は、電線５を更に備える。電線５は被覆電線であり、導線５１と被覆部５２とを備える。導線５１の一端部には接続端子５１１が設けられている。被覆部５２は絶縁性及び防水性を有し、導線５１を被覆する。ただし、被覆部５２は接続端子５１１を覆わない。
電線５の接続端子５１１は、収容部２４２，２４２の基端側の開口から収容部２４２，２４２に挿入され、接続端子２２２，２２２の一方に接続される。接続端子２２２，５１１を互いに確実に、且つ着脱可能に接続するために、例えば接続端子５１１に接続端子２２２を着脱可能に挟み持つ挟持部が設けられることが望ましい。 As shown in FIGS. 1 to 3, the electrostatic spraying device 1 further includes an electric wire 5. The electric wire 5 is a covered electric wire and includes a conductive wire 51 and a covering portion 52. A connection terminal 511 is provided at one end of the conducting wire 51. The covering portion 52 has an insulating property and a waterproof property, and covers the conductive wire 51. However, the covering portion 52 does not cover the connection terminal 511.
The connection terminal 511 of the electric wire 5 is inserted into the housing portions 242 and 242 through the openings on the base end sides of the housing portions 242 and 242 and connected to one of the connection terminals 222 and 222. In order to securely and detachably connect the connection terminals 222 and 511 to each other, for example, it is desirable to provide a pinching portion that detachably holds the connection terminal 222 on the connection terminal 511.

防水部材２３は、防水部材２３の封止栓２３２，２３２が保持部材２４の収容部２４２，２４２の先端側の開口に嵌め込まれることによって、保持部材２４に保持される。封止栓２３２は、収容部２４２の先端側の開口を液密に封止する。封止栓２３２，２３２から突出している接続端子２２２，２２２は、収容部２４２，２４２の先端側の開口から収容部２４２，２４２の内部に挿入されることによって、収容部２４２，２４２に収容される。接続端子２２２に接続されている電線５の接続端子５１１も収容部２４２に収容される。   The waterproof member 23 is held by the holding member 24 when the sealing plugs 232 and 232 of the waterproof member 23 are fitted into the openings on the distal ends of the accommodating portions 242 and 242 of the holding member 24. The sealing plug 232 liquid-tightly seals the opening on the distal end side of the housing portion 242. The connection terminals 222, 222 protruding from the sealing plugs 232, 232 are accommodated in the accommodating portions 242, 242 by being inserted into the accommodating portions 242, 242 through the openings on the distal ends of the accommodating portions 242, 242. The The connection terminal 511 of the electric wire 5 connected to the connection terminal 222 is also accommodated in the accommodating portion 242.

つまり、接続端子２２２，５１１は、収容部２４２の内部で互いに接続される。収容部２４２，２４２夫々の両端開口は液密に封止されるので、電極２２の接続端子２２２，２２２及び電線５の接続端子５１１が絶縁及び防水される。以上の結果、電極２２又は電線５からの漏電が防止されるので、静電散布装置１の使用者が感電する虞はない。
また、封止栓２３２，２３２の収容部２４２，２４２の先端側の開口への嵌め込みによって、収容部２４２，２４２の先端側の開口の封止と、保持部材２４への防水部材２３の取り付けとを同時に行なうことができる。 That is, the connection terminals 222 and 511 are connected to each other inside the housing portion 242. Since the opening at both ends of each of the accommodating portions 242 and 242 is sealed in a liquid-tight manner, the connection terminals 222 and 222 of the electrode 22 and the connection terminal 511 of the electric wire 5 are insulated and waterproofed. As a result, since leakage from the electrode 22 or the electric wire 5 is prevented, there is no possibility that the user of the electrostatic spraying device 1 will receive an electric shock.
Further, by fitting the sealing plugs 232 and 232 into the openings on the distal end side of the housing portions 242 and 242, sealing the opening on the distal end side of the housing portions 242 and 242 and attaching the waterproof member 23 to the holding member 24. Can be performed simultaneously.

なお、電極２２は１つの接続端子２２２を備えてもよい。しかしながら、接続端子２２２が１つの場合でも、防水部材２３は２つの封止栓２３２，２３２を備えていることが望ましい。何故ならば、防水部材２３が１つの封止栓２３２しか備えていない場合、保持部材２４が防水部材２３を保持する強度が低下するからである。   The electrode 22 may include one connection terminal 222. However, even when the number of connection terminals 222 is one, it is desirable that the waterproof member 23 includes two sealing plugs 232 and 232. This is because when the waterproof member 23 includes only one sealing plug 232, the strength with which the holding member 24 holds the waterproof member 23 decreases.

保持部材２４は、２つの封止部材２４３，２４３を更に備える。各封止部材２４３は絶縁性及び防水性を有し、例えば合成ゴム製又は合成樹脂製である。封止部材２４３は円柱状をなす。封止部材２４３の周面には、夫々適宜の弾性を有する複数の鍔が軸長方向に並設されている。封止部材２４３は、収容部２４２の基端側の開口に嵌め入れられることによって、収容部２４２の基端側の開口を液密に封止する。
封止部材２４３，２４３の一方には、電線５が貫通する貫通孔が設けられている。貫通孔が設けられている封止部材２４３は、電線５の被覆部５２で覆われている部分に配されている。電線５と電線５に貫通された封止部材２４３とは液密に接触している。 The holding member 24 further includes two sealing members 243 and 243. Each sealing member 243 has insulating properties and waterproof properties, and is made of, for example, synthetic rubber or synthetic resin. The sealing member 243 has a cylindrical shape. On the peripheral surface of the sealing member 243, a plurality of ridges each having appropriate elasticity are arranged in parallel in the axial length direction. The sealing member 243 is fitted into the opening on the proximal end side of the housing portion 242, thereby sealing the opening on the proximal end side of the housing portion 242 in a liquid-tight manner.
One of the sealing members 243 and 243 is provided with a through hole through which the electric wire 5 passes. The sealing member 243 provided with the through hole is disposed in a portion covered with the covering portion 52 of the electric wire 5. The electric wire 5 and the sealing member 243 penetrating through the electric wire 5 are in liquid-tight contact.

保持部材２４は、２つの抜け止め２４４，２４４を更に備える。抜け止め２４４，２４４は、収容部２４２，２４２に取り付けられる。抜け止め２４４，２４４は、収容部２４２，２４２から封止部材２４３，２４３が抜け出ないように、収容部２４２，２４２の基端側の開口を閉鎖する。
各抜け止め２４４には遊挿孔が設けられている。一方の抜け止め２４４（電線５に貫通されている封止部材２４３のための抜け止め２４４）の遊挿孔には、電線５が遊びを有して挿入される。他方の抜け止め２４４の遊挿孔には電線５は挿入されない。しかしながら、両方の抜け止め２４４，２４４に遊挿孔が設けてあるので、部材が共通化される。 The holding member 24 further includes two stoppers 244 and 244. The stoppers 244 and 244 are attached to the accommodating portions 242 and 242. The stoppers 244 and 244 close the openings on the base end sides of the accommodating portions 242 and 242 so that the sealing members 243 and 243 do not escape from the accommodating portions 242 and 242.
Each retainer 244 is provided with a loose insertion hole. The electric wire 5 is inserted with play in the loose insertion hole of one retaining member 244 (the retaining member 244 for the sealing member 243 penetrating the electric wire 5). The electric wire 5 is not inserted into the loose insertion hole of the other retaining stopper 244. However, since the loose insertion holes are provided in both the stoppers 244 and 244, the members are made common.

静電散布ノズル２は、抜け止め２５を更に備える。
抜け止め２５は被覆部２５１及び３つの係合部２５２，２５２，２５２を備える。
被覆部２５１は、円錐台の周面のような形状を有し、適宜に肉抜きされている。
係合部２５２，２５２，２５２は、被覆部２５１の大径側の端部に、被覆部２５１の周方向に等配されている。各係合部２５２は、被覆部２５１の大径側の端部から被覆部２５１の軸長方向の外向きに突出する。係合部２５２の先端部には、被覆部２５１の径方向の内向きに突出する爪が設けられている。この爪は、直角台形状の断面を有する。 The electrostatic spray nozzle 2 further includes a stopper 25.
The stopper 25 includes a covering portion 251 and three engaging portions 252 252 252.
The covering portion 251 has a shape like a peripheral surface of a truncated cone, and is appropriately thinned.
The engaging portions 252, 252, and 252 are equally arranged at the end of the covering portion 251 on the large diameter side in the circumferential direction of the covering portion 251. Each engaging portion 252 protrudes outward in the axial length direction of the covering portion 251 from the end on the large diameter side of the covering portion 251. A claw projecting inward in the radial direction of the covering portion 251 is provided at the distal end portion of the engaging portion 252. The claw has a right trapezoidal cross section.

保持部材２４は環状部２４５及び６つの係合部２４６，２４６，…を更に備える。
環状部２４５は中心部が開口した円板状をなし、筒状部２４１を同軸に取り囲むようにして、筒状部２４１の基端部に連結されている。
各係合部２４６は、環状部２４５の外周部を切り欠くように設けられた凹状をなす。係合部２４６，２４６，…は、環状部２４５の周方向に等配されている。 The holding member 24 further includes an annular portion 245 and six engaging portions 246, 246,.
The annular portion 245 has a disk shape with an open center, and is connected to the base end portion of the tubular portion 241 so as to surround the tubular portion 241 coaxially.
Each engaging portion 246 has a concave shape provided so as to cut out the outer peripheral portion of the annular portion 245. The engaging portions 246, 246,... Are equally arranged in the circumferential direction of the annular portion 245.

抜け止め２５の係合部２５２は、保持部材２４の係合部２４６の周縁部に係合する。このために、係合部２５２の爪が、保持部材２４の係合部２４６の周縁部に保持部材２４の先端部側から接触し、係合部２５２が外側へ撓むことによって係合部２５２の爪が係合部２４６の周縁部を乗り越え、係合部２４６の周縁部に基端側から係合する。係合部２４６，２５４は係脱可能である。   The engaging portion 252 of the retaining member 25 engages with the peripheral portion of the engaging portion 246 of the holding member 24. For this reason, the claw of the engaging portion 252 comes into contact with the peripheral edge portion of the engaging portion 246 of the holding member 24 from the distal end side of the holding member 24, and the engaging portion 252 is bent outward so that the engaging portion 252 is bent. The claw passes over the peripheral edge of the engaging portion 246 and engages with the peripheral edge of the engaging portion 246 from the base end side. The engaging portions 246 and 254 can be engaged and disengaged.

抜け止め２５は、抜け止め２５の係合部２５２，２５２，２５２が保持部材２４の係合部２４６，２４６，…の何れか３つに係合することによって、保持部材２４に容易に取り付けられる。抜け止め２５が保持部材２４に取り付けられた場合、保持部材２４に取り付けられている防水部材２３は、抜け止め２５の被覆部２５１によって覆われるので、保持部材２４の収容部２４２，２４２から防止部材２３の封止栓２３２，２３２が抜け出ることが防止される。故に、保持部材２４が防水部材２３を保持する強度を向上させることができる。   The retainer 25 is easily attached to the holding member 24 when the engaging portions 252, 252, 252 of the retainer 25 are engaged with any three of the engaging portions 246, 246,. . When the retaining member 25 is attached to the holding member 24, the waterproof member 23 attached to the retaining member 24 is covered by the covering portion 251 of the retaining member 25, so that the preventing member is removed from the housing portions 242 and 242 of the retaining member 24. It is possible to prevent the sealing plugs 232 and 232 of the 23 from coming out. Therefore, the strength with which the holding member 24 holds the waterproof member 23 can be improved.

保持部材２４の筒状部２４１は、ノズル本体２１に取り付けられる。
筒状部２４１の取り付けのために、ノズル本体２１は円筒部材２１２を更に備える。円筒部材２１２は、ノズル本体２１の外周面を覆うようにしてノズル本体２１に取り付けられる。円筒部材２１２の外周面には複数の突出部２１３，２１３，…が周方向に並設されている。突出部２１３は、円筒部材２１２の外周面から径方向に突出する。
一方、筒状部２４１の内周面からは、筒状部２４１の全周に亘って、突出部２４７が径方向に突出している。
ノズル本体２１は、ノズル本体２１の突出部２１３，２１３，…が筒状部２４１の突出部２４７に基端側から係合するように、筒状部２４１の内部に挿入される。 The cylindrical portion 241 of the holding member 24 is attached to the nozzle body 21.
In order to attach the cylindrical portion 241, the nozzle body 21 further includes a cylindrical member 212. The cylindrical member 212 is attached to the nozzle body 21 so as to cover the outer peripheral surface of the nozzle body 21. A plurality of projecting portions 213, 213,... Are juxtaposed in the circumferential direction on the outer peripheral surface of the cylindrical member 212. The protruding portion 213 protrudes in the radial direction from the outer peripheral surface of the cylindrical member 212.
On the other hand, from the inner peripheral surface of the cylindrical part 241, the protruding part 247 protrudes in the radial direction over the entire circumference of the cylindrical part 241.
The nozzle body 21 is inserted into the tubular portion 241 such that the protruding portions 213, 213,... Of the nozzle body 21 are engaged with the protruding portion 247 of the tubular portion 241 from the proximal end side.

保持部材２４は、Ｕ字状に屈曲した棒状のロック部材２４８を更に備える。筒状部２４１の周壁には、２つの貫通孔が周方向に並設されている。ロック部材２４８の長さ方向の２つの端部２４ａ，２４ａは、筒状部２４１の周壁に設けられた２つの貫通孔を貫通して、筒状部２４１の外部から内部に挿入される。ロック部材２４８の端部２４ａ，２４ａは、ノズル本体２１の突出部２１３，２１３，…に基端側から係合する。筒状部２４１の突出部２４７とロック部材２４８との間にノズル本体２１の突出部２１３，２１３，…が挟まれるので、ノズル本体２１の筒状部２４１からの抜脱が防止される。   The holding member 24 further includes a rod-shaped lock member 248 bent in a U shape. Two through holes are juxtaposed in the circumferential direction on the peripheral wall of the cylindrical portion 241. The two end portions 24 a and 24 a in the length direction of the lock member 248 pass through the two through holes provided in the peripheral wall of the cylindrical portion 241 and are inserted into the cylindrical portion 241 from the outside. The end portions 24a and 24a of the lock member 248 engage with the protruding portions 213, 213,... Of the nozzle body 21 from the proximal end side. Since the projecting portions 213, 213,... Of the nozzle body 21 are sandwiched between the projecting portion 247 of the tubular portion 241 and the lock member 248, the nozzle body 21 is prevented from being detached from the tubular portion 241.

以上のようにして静電散布ノズル２が組み立てられる。
組み立てられた静電散布ノズル２は、給水管３１を介してポンプ３に接続される。ポンプ３は、タンク３２に貯留されている液体を加圧し、給水管３１を通して、静電散布ノズル２に送る。すると、ノズル本体２１の噴霧口２１１から液体が噴霧される。 The electrostatic spray nozzle 2 is assembled as described above.
The assembled electrostatic spray nozzle 2 is connected to the pump 3 through a water supply pipe 31. The pump 3 pressurizes the liquid stored in the tank 32 and sends it to the electrostatic spray nozzle 2 through the water supply pipe 31. Then, the liquid is sprayed from the spray port 211 of the nozzle body 21.

組み立てられた静電散布ノズル２において、電極２２の環状部２２１及び防水部材２３の環状部２３１は、ノズル本体２１から噴霧方向に適長離隔した位置で、ノズル本体２１から噴霧される液体の噴霧範囲を取り囲む。保持部材２４の筒状部２４１は、ノズル本体２１を取り囲む。環状部２２１，２３１、筒状部２４１、及び収容部２４２，２４２夫々の軸長方向は、ノズル本体２１噴霧された液体の噴霧方向に沿う。収容部２４２の基端側の開口は噴霧方向の上流側の開口であり、収容部２４２の先端側の開口は噴霧方向の下流側の開口である。防水部材２３の各封止栓２３２は、防水部材２３の環状部２３１から噴霧方向の逆方向に突出する。   In the assembled electrostatic spray nozzle 2, the annular portion 221 of the electrode 22 and the annular portion 231 of the waterproof member 23 are sprayed from the nozzle body 21 at a position spaced from the nozzle body 21 by an appropriate length in the spraying direction. Enclose the range. The cylindrical portion 241 of the holding member 24 surrounds the nozzle body 21. The axial length directions of the annular portions 221 and 231, the cylindrical portion 241, and the accommodating portions 242 and 242 are along the spray direction of the liquid sprayed from the nozzle body 21. The opening on the base end side of the housing portion 242 is an opening on the upstream side in the spraying direction, and the opening on the distal end side of the housing portion 242 is an opening on the downstream side in the spraying direction. Each sealing plug 232 of the waterproof member 23 protrudes from the annular portion 231 of the waterproof member 23 in the direction opposite to the spraying direction.

電源４は一次電池又は二次電池を有し、正の高電圧を出力する正電源装置である。電源４は、出力端子及びアース端子を更に有する。電源４のアース端子は接地される。電源４の出力端子には、電線５の導線５１の他端部（接続端子５１１が設けられていない方の端部）が接続される。電源４が出力した正の高電圧は、電線５を通して電極２２に印加される。この結果、電極２２が正に帯電する。
なお、電源４は電池を有しておらず、静電散布装置１の外部の商用電源又は発電機等に接続されていてもよい。 The power supply 4 is a positive power supply device that has a primary battery or a secondary battery and outputs a positive high voltage. The power supply 4 further has an output terminal and a ground terminal. The ground terminal of the power supply 4 is grounded. The output terminal of the power source 4 is connected to the other end portion of the conducting wire 51 of the electric wire 5 (the end portion on which the connection terminal 511 is not provided). The positive high voltage output from the power supply 4 is applied to the electrode 22 through the electric wire 5. As a result, the electrode 22 is positively charged.
The power source 4 does not have a battery and may be connected to a commercial power source or a generator outside the electrostatic spraying device 1.

静電散布ノズル２は、圃場に植えられた作物に向けて液体が噴霧されるようにして用いられる。電極２２が正に帯電することによって、ノズル本体２１から噴霧された液体は負に帯電する。帯電した液体は、静電効果により、圃場に植えられた作物にムラなく付着する。
なお、電源４は負の高電圧を出力する負電源装置でもよい。この場合、電極２２が負に帯電するので、ノズル本体２１から噴霧された液体は正に帯電する。 The electrostatic spray nozzle 2 is used so that a liquid is sprayed toward a crop planted in a field. When the electrode 22 is positively charged, the liquid sprayed from the nozzle body 21 is negatively charged. The charged liquid adheres uniformly to the crops planted in the field due to the electrostatic effect.
The power supply 4 may be a negative power supply device that outputs a negative high voltage. In this case, since the electrode 22 is negatively charged, the liquid sprayed from the nozzle body 21 is positively charged.

ところで、静電散布ノズル２（延いては静電散布装置１）に所要の性能を与えるためには、防水部材２３を構成する合成ゴム又は合成樹脂の電気抵抗値、防水部材２３の環状部２３１の形状及び厚み等を最適化する必要がある。仮に、防水部材２３の絶縁性又は防水性が所定の性能を下回っている場合、漏電又は短絡等が発生する虞がある。また、仮に、防水部材２３の絶縁性が高すぎる場合、ノズル本体２１から噴霧された液体を帯電させることができず、静電効果が不足する虞がある。   By the way, in order to give the electrostatic spraying nozzle 2 (and hence the electrostatic spraying device 1) the required performance, the electrical resistance value of the synthetic rubber or the synthetic resin constituting the waterproof member 23, the annular portion 231 of the waterproof member 23. It is necessary to optimize the shape, thickness and the like. If the insulating property or waterproofness of the waterproof member 23 is lower than the predetermined performance, there is a risk of leakage or short circuit. In addition, if the insulating property of the waterproof member 23 is too high, the liquid sprayed from the nozzle body 21 cannot be charged, and the electrostatic effect may be insufficient.

静電散布ノズル２は分解が容易である。例えば、保持部材２４の係合部２４６，２４６，２４６と抜け止め２５の係合部２５２，２５２，２５２との係合が解除されることによって、保持部材２４から抜け止め２５が取り外される。また、保持部材２４の収容部２４２，２４２から防水部材２３の封止栓２３２，２３２が引き抜かれ、電極２２の接続端子２２２から電線５の接続端子５１１が取り外されることによって、保持部材２４及び電線５から電極２２及び防水部材２３が取り外される。   The electrostatic spray nozzle 2 is easy to disassemble. For example, when the engagement portions 246, 246, 246 of the holding member 24 and the engagement portions 252, 252, 252 of the retaining member 25 are disengaged, the retaining member 25 is removed from the retaining member 24. Further, the sealing plugs 232 and 232 of the waterproof member 23 are pulled out from the accommodating portions 242 and 242 of the holding member 24, and the connection terminal 511 of the electric wire 5 is removed from the connection terminal 222 of the electrode 22. 5, the electrode 22 and the waterproof member 23 are removed.

静電散布ノズル２の分解は、例えば劣化した部品の交換のために行なわれる。ノズル本体２１の交換、電極２２及び防水部材２３の交換、保持部材２４の交換、抜け止め２５の交換、並びに電線５の交換等は、個別に行なうことができる。従って、無駄に交換される部品を削減することができる。
電極２２及び防水部材２３は一体化されているので、防水部材２３を他の防水部材に交換することはできない。故に、劣化した防水部材２３が、所定の性質を有していない防水部材に交換される虞はない。 The electrostatic spray nozzle 2 is disassembled, for example, for replacement of deteriorated parts. The replacement of the nozzle body 21, the replacement of the electrode 22 and the waterproof member 23, the replacement of the holding member 24, the replacement of the retaining member 25, the replacement of the electric wire 5, and the like can be performed individually. Therefore, it is possible to reduce parts that are replaced in vain.
Since the electrode 22 and the waterproof member 23 are integrated, the waterproof member 23 cannot be replaced with another waterproof member. Therefore, there is no possibility that the deteriorated waterproof member 23 is replaced with a waterproof member having no predetermined property.

部品の交換後、静電散布ノズル２が再度組み立てられる。静電散布ノズル２を組み立てる場合には、電極２２及び防水部材２３の取り付けが同時的に行なわれる。故に、電極２２及び防水部材２３の何れか一方のみを取り付け忘れる虞はない。電極２２及び防水部材２３の取り付けが行なわれなかったときには、静電効果が得られない。故に、電極２２及び防水部材２３の取り付け忘れに容易に気づくことができる。
以上の結果、部品の交換に伴う不具合の発生（漏電又は静電効果の不足等）を防止することができる。 After replacement of the parts, the electrostatic spray nozzle 2 is reassembled. When the electrostatic spray nozzle 2 is assembled, the electrode 22 and the waterproof member 23 are attached simultaneously. Therefore, there is no possibility of forgetting to attach only one of the electrode 22 and the waterproof member 23. When the electrode 22 and the waterproof member 23 are not attached, the electrostatic effect cannot be obtained. Therefore, it is possible to easily notice that the electrode 22 and the waterproof member 23 are forgotten to be attached.
As a result of the above, it is possible to prevent the occurrence of defects (leakage or lack of electrostatic effect) associated with the replacement of parts.

電極２２及び防水部材２３が一体化されているので、これらが別体の場合に比べて、部品点数を削減することができる。故に、静電散布ノズル２の組み立て時及び分解時における部品の準備及び交換等が容易である。
保持部材２４への抜け止め２５の取り付け、及び保持部材２４からの抜け止め２５の取り外しは、係合部２４６，２５２の係脱によって容易に行なうことができる。故に、例えば抜け止め２５が保持部材２４に螺合によって取り付けられる場合に比べて、静電散布ノズル２の組み立て及び分解に要する時間を短縮することができる。
以上のような静電散布装置１は、例えば背負い式噴霧機、自走式噴霧機、又は手押し式噴霧機の何れであってもよい。 Since the electrode 22 and the waterproof member 23 are integrated, the number of parts can be reduced compared to the case where these are separate bodies. Therefore, it is easy to prepare and replace parts when assembling and disassembling the electrostatic spray nozzle 2.
Attachment of the retaining member 25 to the holding member 24 and removal of the retaining member 25 from the holding member 24 can be easily performed by engaging and disengaging the engaging portions 246 and 252. Therefore, for example, the time required for the assembly and disassembly of the electrostatic spray nozzle 2 can be shortened as compared with the case where the stopper 25 is attached to the holding member 24 by screwing.
The electrostatic spraying device 1 as described above may be, for example, a backpack type sprayer, a self-propelled sprayer, or a hand-held sprayer.

なお、静電散布装置１が複数個の静電散布ノズル２，２，…を備えている場合、各静電散布ノズル２が備える電極２２の接続端子２２２，２２２の両方に、電線５，５の接続端子５１１，５１１が接続される。電源４及び静電散布ノズル２，２，…の電極２２，２２，…は、電線５，５，…を介して直列に接続される。この場合、最も電源４から遠い静電散布ノズル２は、図１〜図３に示すように、電極２２の接続端子２２２，２２２の何れか一方に電線５の接続端子５１１が接続される。   When the electrostatic spraying device 1 includes a plurality of electrostatic spraying nozzles 2, 2,..., Electric wires 5, 5 are connected to both of the connection terminals 222, 222 of the electrodes 22 included in each electrostatic spraying nozzle 2. Connection terminals 511 and 511 are connected. The electrodes 22, 22,... Of the power source 4 and the electrostatic spray nozzles 2, 2,. In this case, as shown in FIGS. 1 to 3, the electrostatic spray nozzle 2 farthest from the power source 4 has the connection terminal 511 of the electric wire 5 connected to one of the connection terminals 222 and 222 of the electrode 22.

今回開示された実施の形態は、全ての点で例示であって、制限的なものではないと考えられるべきである。本発明の範囲は、上述した意味ではなく、特許請求の範囲と均等の意味及び特許請求の範囲内での全ての変更が含まれることが意図される。   The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is not intended to include the above-described meanings, but is intended to include meanings equivalent to the claims and all modifications within the scope of the claims.

１ 静電散布装置
２ 静電散布ノズル
２１ ノズル本体
２２ 電極
２２２ 接続端子
２３ 防水部材
２３２ 封止栓
２４ 保持部材
２４１ 筒状部
２４２ 収容部
２４３ 封止部材
２４６，２５２ 係合部
２５ 抜け止め
３ ポンプ
４ 電源
５ 電線 DESCRIPTION OF SYMBOLS 1 Electrostatic spraying apparatus 2 Electrostatic spray nozzle 21 Nozzle main body 22 Electrode 222 Connection terminal 23 Waterproof member 232 Seal plug 24 Holding member 241 Cylindrical part 242 Storage part 243 Sealing member 246, 252 Engagement part 25 Retaining 3 Pump 4 Power supply 5 Electric wire

Claims (6)

帯電した液体を散布するための静電散布ノズルにおいて、
液体を噴霧するノズル本体と、
該ノズル本体から噴霧される液体の周囲に配され、軸長方向が前記液体の噴霧方向に沿う環状の電極と、
該電極が埋め込まれ、該電極を絶縁し防水する環状の防水部材と、
先端部が前記防水部材の外部に露出するように前記電極から突出する接続端子と、
絶縁性及び防水性を有し、前記ノズル本体に取り付けられ、前記防水部材を保持する保持部材と
を備えることを特徴とする静電散布ノズル。 In electrostatic spray nozzles for spraying charged liquids,
A nozzle body for spraying liquid;
An annular electrode arranged around the liquid sprayed from the nozzle body, the axial length direction of the liquid spraying direction;
An annular waterproof member embedded with the electrode to insulate and waterproof the electrode;
A connection terminal protruding from the electrode such that the tip is exposed to the outside of the waterproof member;
An electrostatic spray nozzle comprising: a holding member that has an insulating property and a waterproof property, is attached to the nozzle body, and holds the waterproof member. 前記防水部材は合成ゴム製又は合成樹脂製であり、
前記電極と前記防水部材とはインサート成形によって一体化されていることを特徴とする請求項１に記載の静電散布ノズル。 The waterproof member is made of synthetic rubber or synthetic resin,
The electrostatic spray nozzle according to claim 1, wherein the electrode and the waterproof member are integrated by insert molding. 前記電極は、軸長方向の中途が屈曲していることを特徴とする請求項１又は２に記載の静電散布ノズル。   The electrostatic spray nozzle according to claim 1, wherein the electrode is bent in the axial direction. 前記保持部材は、
軸長方向が前記噴霧方向に沿い、前記ノズル本体を取り囲むようにして該ノズル本体に取り付けられる筒状部と、
軸長方向が前記噴霧方向に沿い、前記筒状部の外周面に設けられ、前記接続端子が前記噴霧方向の下流側の開口から挿入されることによって前記接続端子を収容する筒状の収容部と、
該収容部の前記噴霧方向の上流側の開口を液密に封止する封止部材と
を有し、
前記防水部材には、前記噴霧方向とは逆方向に前記防水部材から突出し、前記接続端子が貫通し、前記収容部の前記下流側の開口に嵌め込まれることによって該下流側の開口を液密に封止する封止栓が突設され、
前記防水部材は、前記封止栓が前記下流側の開口に嵌め込まれることによって、前記保持部材に保持されることを特徴とする請求項１から３の何れか一項に記載の静電散布ノズル。 The holding member is
A cylindrical portion that is attached to the nozzle body so that the axial direction is along the spray direction and surrounds the nozzle body;
A cylindrical housing part that is provided on the outer peripheral surface of the tubular part along the axial direction in the spray direction and that accommodates the connection terminal by inserting the connection terminal from an opening on the downstream side in the spraying direction. When,
A sealing member that liquid-tightly seals the opening on the upstream side in the spraying direction of the container,
The waterproof member protrudes from the waterproof member in a direction opposite to the spraying direction, the connection terminal penetrates, and the downstream opening is liquid-tightened by being fitted into the downstream opening of the housing portion. A sealing plug for sealing protrudes,
The electrostatic spray nozzle according to any one of claims 1 to 3, wherein the waterproof member is held by the holding member when the sealing plug is fitted into the opening on the downstream side. . 前記封止栓の前記下流側の開口からの抜脱を防止する抜け止めを更に備え、
該抜け止め及び前記保持部材夫々に、互いに係合する係合部が設けられており、該係合部同士の係合によって前記抜け止めが前記保持部材に保持されていることを特徴とする請求項４に記載の静電散布ノズル。 A stopper for preventing the sealing plug from being pulled out from the downstream opening;
Each of the retaining member and the holding member is provided with an engaging portion that engages with each other, and the retaining member is held by the retaining member by the engagement of the engaging portions. Item 5. The electrostatic spray nozzle according to Item 4. 帯電した液体を散布する静電散布装置において、
請求項１から５の何れか一項に記載の静電散布ノズルと、
該静電散布ノズルが備えるノズル本体に液体を圧送するポンプと、
前記静電散布ノズルが備える接続端子の先端部に接続される電線と、
該電線を介して、前記静電散布ノズルが備える電極を帯電させる電源と
を備えることを特徴とする静電散布装置。 In electrostatic spraying devices that spray charged liquids,
An electrostatic spray nozzle according to any one of claims 1 to 5,
A pump for pumping liquid to a nozzle body provided in the electrostatic spray nozzle;
An electric wire connected to the tip of a connection terminal provided in the electrostatic spray nozzle;
An electrostatic spraying device comprising: a power source for charging an electrode included in the electrostatic spraying nozzle through the electric wire.
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WO2023042585A1 (en) * 2021-09-16 2023-03-23 有光工業株式会社 Electrostatic spraying device

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JPH09999A (en) * 1995-06-21 1997-01-07 Nissan Motor Co Ltd Electrostatic coating gun
JP2009159995A (en) * 2009-04-23 2009-07-23 Arimitsu Industry Co Ltd Electrostatic broadcasting nozzle
JP2011056331A (en) * 2009-09-05 2011-03-24 Asahi Sunac Corp Spray gun for use in electrostatic coating
JP2012035170A (en) * 2010-08-05 2012-02-23 Minoru Industrial Co Ltd Electric leakage preventing part

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