JP2012086152A - Spray gun, coating system - Google Patents

Spray gun, coating system Download PDF

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Publication number
JP2012086152A
JP2012086152A JP2010234850A JP2010234850A JP2012086152A JP 2012086152 A JP2012086152 A JP 2012086152A JP 2010234850 A JP2010234850 A JP 2010234850A JP 2010234850 A JP2010234850 A JP 2010234850A JP 2012086152 A JP2012086152 A JP 2012086152A
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Prior art keywords
paint
spray gun
valve
flow path
air
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JP2010234850A
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JP5654834B2 (en
Inventor
Nobuhiro Miki
信寛 三木
Toyohito Nakaoka
豊人 中岡
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Kansai Paint Co Ltd
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Kansai Paint Co Ltd
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Priority to JP2010234850A priority Critical patent/JP5654834B2/en
Priority to KR1020110100732A priority patent/KR101276589B1/en
Priority to CN2011203933303U priority patent/CN202290382U/en
Priority to CN201110314116.9A priority patent/CN102451801B/en
Publication of JP2012086152A publication Critical patent/JP2012086152A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1254—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated
    • B05B7/1263—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated
    • B05B7/1272—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated actuated by gas involved in spraying, i.e. exiting the nozzle, e.g. as a spraying or jet shaping gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2489—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device
    • B05B7/2491—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device characterised by the means for producing or supplying the atomising fluid, e.g. air hoses, air pumps, gas containers, compressors, fans, ventilators, their drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B05B12/1409—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet the selection means being part of the discharge apparatus, e.g. part of the spray gun
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0876—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form parallel jets constituted by a liquid or a mixture containing a liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter

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  • Nozzles (AREA)
  • Spray Control Apparatus (AREA)

Abstract

PROBLEM TO BE SOLVED: To develop a spray gun for easily preventing a tip of a gun from being contaminated with a coating material discharged from a coating material discharge hole after the supply of the coating material is stopped, and to develop a coating system using the spray gun.SOLUTION: In a body including a plurality of coating material flow passages 21 and an air flow passage 22 through which compressed air for atomizing the discharged coating material from the coating material discharge hole at one end of each of the coating material flow passages 21 is supplied, the spray gun 10 provided with an opening and closing valve 40 for opening and closing the coating material flow passages 21 and the coating system constituted using the spray gun 10 are provided.

Description

本発明は、塗料を霧化して被塗装物に塗装するためのスプレーガン、及びそれを用いた塗装システムに関する。   The present invention relates to a spray gun for atomizing paint and applying it to an object to be coated, and a coating system using the same.

自動車車体、家電製品、家具等の工業製品、建物の内壁、外壁、橋梁といった建造物などの被塗装物に塗料を付着させる塗装には、吐出塗料を霧化して噴射する構成のスプレーガンが広く用いられている。また、このスプレーガンとしては、互いに色が異なる複数の塗料を霧化し多色同時に塗装可能な構成のもの（以下、多色塗装用スプレーガンとも言う）も提供されている（例えば特許文献１−３）。多色塗装用スプレーガンを用いた多色同時塗装は、２色以上の塗料を完全には混色させずに被塗装物に付着させて、通常の目視にて視認可能な大小粒子が異なる色彩で混在する色模様（多色混在模様）を形成できる。多色塗装用スプレーガンを用いた多色同時塗装によって形成する多色混在模様としては、例えば大理石模様、御影石模様といった石調模様であるが、この他、皮革目調、木目調、毛皮調、布調、和紙調等の様々な色模様を挙げることができる。   A wide range of spray guns that atomize and spray sprayed paint are used to apply paint to objects such as automobile bodies, household appliances, furniture, and other industrial products, buildings such as buildings, exterior walls, and bridges. It is used. As this spray gun, there is also provided a spray gun that can atomize a plurality of paints having different colors (hereinafter also referred to as a spray gun for multi-color coating). 3). Multi-color simultaneous painting using a spray gun for multi-color painting allows two or more paints to adhere to the object to be painted without completely mixing them, and the large and small particles that can be visually recognized with different colors Mixed color patterns (multicolor mixed patterns) can be formed. Multi-color mixed patterns formed by multi-color simultaneous painting using a spray gun for multi-color painting are, for example, stone-like patterns such as marble patterns and granite patterns, but in addition, leather tone, wood tone, fur tone, Various color patterns such as fabric tone and Japanese paper tone can be listed.

上述のスプレーガンは、塗料供給装置からホース等を介して供給された塗料を、圧縮空気源から供給された霧化用エア（圧縮空気）によって霧化して噴射するものである。このスプレーガンは、先端部に塗料吐出孔が開口されたノズルと、このノズルの前記先端部に装着したテーパ筒状の蓋とを有する概略構成となっているものが一般的である。スプレーガンに供給された塗料は、ガンに設けられた塗料流路を通ってノズルに導かれ、ノズル先端の前記塗料吐出孔から吐出される。そして、このスプレーガンは、ノズル先端の塗料吐出孔からの吐出塗料を、蓋内側にてノズル先端周囲に確保された空間に前記霧化用エア供給ホースから供給される霧化用エアによって霧化し、前記蓋の先端に開口する噴射口から噴射する。
また、スプレーガンとしては、パターンエアの供給によって塗装パターンを形成可能としたもの（パターンエア系のスプレーガン）も種々提供されている。 The spray gun described above atomizes and sprays paint supplied from a paint supply device via a hose or the like with atomizing air (compressed air) supplied from a compressed air source. The spray gun generally has a general configuration including a nozzle having a paint discharge hole opened at the tip and a tapered cylindrical lid attached to the tip of the nozzle. The paint supplied to the spray gun is guided to the nozzle through the paint flow path provided in the gun, and is discharged from the paint discharge hole at the tip of the nozzle. The spray gun atomizes the paint discharged from the paint discharge hole at the tip of the nozzle by the atomizing air supplied from the atomizing air supply hose in a space secured around the nozzle tip inside the lid. Injecting from the injection opening opened to the front-end | tip of the said lid | cover.
Various spray guns (pattern air spray guns) that can form a paint pattern by supplying pattern air are also provided.

また、塗料流路を１本だけ有する単色塗装用のスプレーガンは、トリガーに連動したニードル式の塗料流路開閉機構を有する構成が広く普及している。この単色塗装用のスプレーガンの塗料流路開閉機構は、ノズル後側に設けられたニードル移動機構を有し、塗料流路の途中にテーパ孔状に形成した弁座に対して、トリガーに連動する前記ニードル移動機構によって塗料流路内をノズル先端に向かって進退動されるニードルを接離させて塗料流路を開閉するものである。この塗料流路開閉機構は、構成が複雑であり、複数の部品を、塗料流路が形成されたガン本体に組み付けて組み立てられるため、組み立てに手間が掛かる。
一方、複数の塗料流路がある多色塗装用スプレーガンは、その機構が複雑になることを避けるべく、スプレーガンへの塗料の供給制御用の弁をスプレーガンの系外に設けて使用することが一般的である。 Further, a spray gun for monochromatic coating having only one paint channel has a widespread configuration having a needle-type paint channel opening / closing mechanism interlocked with a trigger. The paint channel opening / closing mechanism of the spray gun for monochrome paint has a needle movement mechanism provided on the rear side of the nozzle, and interlocks with the trigger for the valve seat formed in the taper hole shape in the middle of the paint channel The needle moving mechanism opens and closes the paint flow path by moving the needle moved forward and backward in the paint flow path toward the nozzle tip. This paint channel opening / closing mechanism has a complicated configuration, and a plurality of parts are assembled and assembled to the gun body in which the paint channel is formed.
On the other hand, a spray gun for multi-color coating with a plurality of paint flow paths is used with a valve for controlling the supply of paint to the spray gun provided outside the spray gun system in order to avoid the complexity of the mechanism. It is common.

特許第３４５１１６４号公報Japanese Patent No. 3451164 特許第３９４６８８１号公報Japanese Patent No. 39466881 特開２００７−２１６２２０号公報JP 2007-216220 A

上述のように、スプレーガンの系外に配置した弁によって塗料の供給を制御する構成では、弁から塗料吐出孔までの距離が長いため、塗料の供給を停止しても、塗料吐出孔からの塗料の吐出が直ちに停止しないことがある。このため、従来は、塗料の供給停止後に塗料吐出孔から吐出される塗料によってガン先が汚れることを、圧縮エア（霧化用エア及び／又はパターンエア）の供給制御及び弁による塗料の供給制御の調整によって解決してきた。
しかしながら、この対策は、塗料の流量や物性（粘度等）に応じて、圧縮エアの供給制御及び弁による塗料の供給制御を調整する必要があり、調整に手間が掛かることがあった。特に、多色塗装用スプレーガンを用いた多色塗装の場合は、各色の塗料の流量や物性（粘度等）のばらつきを考慮して、圧縮エアの供給制御及び弁による塗料の供給制御を調整することになり、調整が容易でなかった。 As described above, in the configuration in which the supply of the paint is controlled by a valve arranged outside the spray gun system, the distance from the valve to the paint discharge hole is long. The paint discharge may not stop immediately. For this reason, conventionally, the supply control of compressed air (air for atomization and / or pattern air) and the supply control of paint by a valve indicate that the tip of the gun is soiled by the paint discharged from the paint discharge hole after the supply of paint is stopped. It has been solved by adjusting.
However, this measure needs to adjust the supply control of compressed air and the supply control of the paint by the valve according to the flow rate and physical properties (viscosity, etc.) of the paint, and the adjustment may take time. In particular, in the case of multicolor painting using a spray gun for multicolor painting, the supply control of compressed air and the control of paint supply by valves are adjusted in consideration of variations in the flow rate and physical properties (viscosity, etc.) of each color paint. Therefore, adjustment was not easy.

本発明は、上述の事情に鑑みて、塗料の供給停止後に塗料吐出孔から吐出される塗料によるガン先の汚れ防止を簡単に実現できるスプレーガン、及び該スプレーガンを用いた塗装システムの提供を目的としている。   In view of the circumstances described above, the present invention provides a spray gun that can easily prevent contamination of a gun tip with paint discharged from a paint discharge hole after the supply of paint is stopped, and a coating system using the spray gun. It is aimed.

上記課題を解決するために、本発明では以下の構成を提供する。
第１の発明は、塗料流路が複数形成されたボディに、前記塗料流路の片端の塗料吐出孔からの吐出塗料を霧化する圧縮空気が供給される空気流路を有し、霧化した塗料を噴射するスプレーガンであって、前記ボディに、前記塗料流路を開閉する開閉弁が設けられているスプレーガンを提供する。
第２の発明は、前記塗料流路は前記ボディにおいて前記塗料吐出孔とは反対の後側に形成された塗料入口からボディ前側の前記塗料吐出孔にわたって延在形成され、前記開閉弁は、前記塗料流路の流路長手方向中央部あるいは該流路長手方向中央部から前側に介在されている第１の発明のスプレーガンを提供する。
第３の発明は、前記ボディに、前記塗料吐出孔及び前記空気流路が開口する開口凹部を有し、前記ボディに複数形成された前記塗料流路の個々に設けられた前記開閉弁が、前記ボディの前記開口凹部の中心軸線の仮想延長回りの複数箇所に分散配置されている第１又は２の発明のスプレーガンを提供する。
第４の発明は、前記ボディは、前記塗料流路及び前記空気流路が形成され、前端部に前記塗料吐出孔が開口するノズル部を有するガン本体と、このガン本体の前端部に装着されて前記ノズル部を収納するテーパ筒状の蓋とを有し、前記蓋に開口する開口凹部内に前記塗料吐出孔及び前記空気流路が開口され、前記開閉弁が前記ガン本体に設けられている第１〜３のいずれかの発明のスプレーガンを提供する。
第５の発明は、前記ボディに、パターンエアを噴射するためのパターンエア噴射口を有するパターンエア流路が、さらに形成されている第１〜４のいずれかの発明のスプレーガンを提供する。
第６の発明は、請求項１〜５のいずれか１項に記載のスプレーガンと、該スプレーガンの前記塗料流路に塗料を供給する塗料供給装置と、前記スプレーガンの前記空気流路に圧縮空気を供給する霧化用圧縮空気供給装置と、前記スプレーガンの開閉弁の動作を制御して前記塗料流路の開閉を切り換える開閉制御装置とを有する塗装システムを提供する。 In order to solve the above problems, the present invention provides the following configuration.
1st invention has an air flow path to which the compressed air which atomizes the discharge paint from the paint discharge hole of the one end of the said paint flow path is supplied to the body in which the multiple paint flow path was formed, A spray gun for injecting the applied paint, wherein the body is provided with an on-off valve for opening and closing the paint flow path.
According to a second aspect of the present invention, the paint channel extends from the paint inlet formed on the rear side opposite to the paint discharge hole in the body to the paint discharge hole on the front side of the body. A spray gun according to a first aspect of the present invention is provided in the middle of the flow path longitudinal direction of the paint flow path or on the front side from the central portion of the flow path longitudinal direction.
According to a third aspect of the present invention, the opening / closing valve provided in each of the plurality of paint passages formed in the body has an opening recess in which the paint discharge hole and the air passage are opened in the body. A spray gun according to the first or second invention is provided, which is distributed at a plurality of locations around a virtual extension of the central axis of the opening recess of the body.
According to a fourth aspect of the present invention, the body includes a gun body having a nozzle portion in which the paint flow path and the air flow path are formed and the paint discharge hole is opened at a front end portion, and the front end portion of the gun main body. And the paint discharge hole and the air flow path are opened in an opening recess opening in the lid, and the on-off valve is provided in the gun body. A spray gun according to any one of the first to third inventions is provided.
5th invention provides the spray gun of the invention in any one of the 1st-4th in which the pattern air flow path which has the pattern air injection port for injecting pattern air to the said body is further formed.
A sixth invention is the spray gun according to any one of claims 1 to 5, a paint supply device that supplies paint to the paint channel of the spray gun, and the air channel of the spray gun. There is provided a coating system having a compressed atomizing air supply device for supplying compressed air, and an open / close control device for controlling the operation of an on / off valve of the spray gun to switch between opening and closing of the paint channel.

本発明によれば、塗料の供給を制御する弁（開閉弁）から塗料吐出孔までの距離を接近させることができ、塗料の供給停止後に塗料吐出孔から吐出される塗料によるガン先の汚れ防止を簡単かつ確実に実現できる。   According to the present invention, the distance from the valve (open / close valve) that controls the supply of paint to the paint discharge hole can be made closer, and the contamination of the gun tip due to the paint discharged from the paint discharge hole after the supply of paint is stopped is prevented. Can be realized easily and reliably.

本発明の１実施形態のスプレーガンを示す図である。It is a figure which shows the spray gun of one Embodiment of this invention. 図１のスプレーガンのその後側から見た構造を示す図である。It is a figure which shows the structure seen from the rear side of the spray gun of FIG. 図１のスプレーガンのノズル及び蓋の付近の構造を示す断面図である。It is sectional drawing which shows the structure of the nozzle and lid | cover vicinity of the spray gun of FIG. 図１のスプレーガンのその前側から見た構造を示す図である。It is a figure which shows the structure seen from the front side of the spray gun of FIG. 図１のスプレーガンの塗料流路と開閉弁との関係を説明するモデル図である。It is a model figure explaining the relationship between the coating material flow path and on-off valve of the spray gun of FIG. 図１のスプレーガンの開閉弁の具体例を示す図である。It is a figure which shows the specific example of the on-off valve of the spray gun of FIG. 図１のスプレーガンを用いて構成した塗装システムの一例を説明するモデル図である。It is a model figure explaining an example of the coating system comprised using the spray gun of FIG. 別態様のスプレーガンを示す図であって、ガン胴体後側に設けられた開閉弁から塗料流路に塗料が供給される構成のスプレーガンを示す図である。It is a figure which shows the spray gun of another aspect, Comprising: It is a figure which shows the spray gun of the structure by which a coating material is supplied to the coating material flow path from the on-off valve provided in the gun fuselage rear side. 別態様のスプレーガンを示す図であって、ガン胴体後側に設けられた開閉弁から塗料流路に塗料が供給される構成のスプレーガンを示す図である。It is a figure which shows the spray gun of another aspect, Comprising: It is a figure which shows the spray gun of the structure by which a coating material is supplied to the coating material flow path from the on-off valve provided in the gun fuselage rear side. 別態様のスプレーガンを示す図であって、塗料流路に、ガン胴体の外周に設けられた開閉弁に接続された塗料入口から塗料が供給される構成のスプレーガンを示す図である。It is a figure which shows the spray gun of another aspect, Comprising: It is a figure which shows the spray gun of the structure by which a coating material is supplied to the coating material flow path from the coating material inlet connected to the on-off valve provided in the outer periphery of the gun fuselage.

以下、本発明の１実施形態のスプレーガン、塗装システムについて、図面を参照して説明する。
図１〜図５に示すように、ここで説明するスプレーガン１０は、互いに色が異なる複数（図示例では４種類）の塗料を霧化し多色同時に被塗装物に塗装するための多色塗装用スプレーガンである。このスプレーガン１０は、２色以上の塗料を完全には混色させずに被塗装物に付着させて、通常の目視にて視認可能な大小粒子が異なる色彩で混在する色模様（多色混在模様）を形成する多色同時塗装を実現できる。
なお、このスプレーガン１０について、蓋３０が設けられている側（図１において左側）を前、反対側（図１において右側）を後、として説明する。 Hereinafter, a spray gun and a coating system according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 5, the spray gun 10 described here is a multicolor coating for atomizing a plurality (four types in the illustrated example) of paints having different colors and applying them to a multi-colored object at the same time. For spray guns. This spray gun 10 is a color pattern (multicolor mixed pattern) in which two or more colors of paint are adhered to an object to be coated without being completely mixed, and large and small particles that can be visually recognized by normal visual observations are mixed in different colors. ) Can be achieved.
The spray gun 10 will be described with the side on which the lid 30 is provided (left side in FIG. 1) as the front and the opposite side (right side in FIG. 1) as the rear.

図１に示すように、前記スプレーガン１０は、ガン胴体２４にノズル２５（ノズル部）を固定したガン本体２０と、このガン本体２０の前端部に装着された蓋３０とを有している。ガン本体２０の前記ガン胴体２４は、先細りのテーパ状に形成されたノズル２５の先端とは反対の後側に設けられている。ガン本体２０及び蓋３０はスプレーガン１０のボディを構成している。   As shown in FIG. 1, the spray gun 10 includes a gun body 20 in which a nozzle 25 (nozzle portion) is fixed to a gun body 24, and a lid 30 attached to the front end portion of the gun body 20. . The gun body 24 of the gun body 20 is provided on the rear side opposite to the tip of the nozzle 25 formed in a tapered shape. The gun body 20 and the lid 30 constitute the body of the spray gun 10.

図１、図３に示すように、ガン本体２０には、塗料流路２１、及び該塗料流路２１の前記ノズル２５に開口する片端の塗料吐出孔２１ｂからの吐出塗料を霧化するための圧縮空気が供給される空気流路である霧化用エア流路２２が形成されている。また、このガン本体２０には、前記ガン胴体２４の外周面に開口するエア入口２３ａから導入された圧縮空気（パターンエア）を前記蓋３０に開口するパターンエア噴出口２２ｂから噴射するパターンエア流路２３の一部が形成されている。塗料流路２１、霧化用エア流路２２及びパターンエア流路２３は、スプレーガン１０に形成された孔である。
ここで、ガン胴体２４の外周面とは、先細りのテーパ状のノズル２５の中心軸線（具体的には前記中心軸線の仮想延長）上に位置するガン胴体２４の前記ノズル２５の中心軸線に垂直の断面周方向の面を指す。
また、このガン本体２０には、前記塗料流路２１を開閉する開閉弁４０（後述）が前記ガン胴体２４に設けられている。スプレーガン１０は開閉弁４０を含む。 As shown in FIGS. 1 and 3, the gun main body 20 is provided with an atomizing agent for spraying paint discharged from a paint flow path 21 and a paint discharge hole 21 b at one end opening in the nozzle 25 of the paint flow path 21. An atomizing air flow path 22 that is an air flow path to which compressed air is supplied is formed. Further, in this gun body 20, a pattern air flow in which compressed air (pattern air) introduced from an air inlet 23 a that opens to the outer peripheral surface of the gun body 24 is injected from a pattern air outlet 22 b that opens to the lid 30. A part of the path 23 is formed. The paint channel 21, the atomizing air channel 22, and the pattern air channel 23 are holes formed in the spray gun 10.
Here, the outer peripheral surface of the gun body 24 is perpendicular to the center axis of the nozzle 25 of the gun body 24 located on the center axis of the taper-shaped tapered nozzle 25 (specifically, the virtual extension of the center axis). Indicates the surface in the circumferential direction.
The gun body 20 is provided with an on-off valve 40 (described later) on the gun body 24 for opening and closing the paint passage 21. The spray gun 10 includes an on-off valve 40.

ガン本体２０のガン胴体２４は、例えば金属製の一体成形品を採用できるが、これに限定されず、複数部材によって組み立てた構成のものも採用可能である。
図１に示すように、図示例のガン本体２０のガン胴体２４は、ガン胴体本体２４１に、霧化用エア流路２２のエア入口２２ａ及びパターンエア流路２３のエア入口２３ａが形成されたエア流路形成部材２４２をねじ止め（図示略）等によって固定して一体化した構成になっている。ノズル２５は、エア流路形成部材２４２のガン胴体本体２４１とは反対側のガン胴体２４前端に固定してガン胴体２４に一体化されている。エア流路形成部材２４２はガン胴体本体２４１とノズル２５との間に位置している。 The gun body 24 of the gun body 20 can employ, for example, a metal integrally molded product, but is not limited thereto, and a structure assembled by a plurality of members can also be employed.
As shown in FIG. 1, the gun body 24 of the gun body 20 in the illustrated example has an air inlet 22 a of the atomizing air flow path 22 and an air inlet 23 a of the pattern air flow path 23 formed in the gun body main body 241. The air flow path forming member 242 is fixed and integrated by screwing (not shown) or the like. The nozzle 25 is integrated with the gun body 24 by being fixed to the front end of the gun body 24 opposite to the gun body main body 241 of the air flow path forming member 242. The air flow path forming member 242 is located between the gun body main body 241 and the nozzle 25.

ガン本体２０において、前記塗料流路２１はガン本体２０をその前後方向に貫通している。
霧化用エア流路２２及びパターンエア流路２３は、エア流路形成部材２４２の外周面に開口するエア入口２２ａ、２３ａからスプレーガン前側へ延在形成されており、ガン胴体本体２４１には形成されていない。 In the gun body 20, the paint passage 21 penetrates the gun body 20 in the front-rear direction.
The atomizing air flow path 22 and the pattern air flow path 23 are formed to extend from the air inlets 22 a and 23 a that open to the outer peripheral surface of the air flow path forming member 242 to the front side of the spray gun. Not formed.

なお、複数部材によって組み立てたガン胴体２４の具体的構成は図示例のものに限定されない。ガン胴体２４は例えば３以上の部材によって組み立てた構成も採用可能である。また、ガン本体２０における霧化用エア流路２２及びパターンエア流路２３のエア入口２２ａ、２３ａの形成位置は適宜変更可能である。
ガン本体としては、ガン胴体とノズルとが一体形成された１部品になっているものも採用可能である。 The specific configuration of the gun body 24 assembled by a plurality of members is not limited to the illustrated example. For example, the gun body 24 may be constructed of three or more members. Moreover, the formation positions of the air inlets 22a and 23a of the atomizing air flow path 22 and the pattern air flow path 23 in the gun body 20 can be changed as appropriate.
As the gun body, a gun body and a nozzle that are integrally formed as a single part can also be used.

図３に示すように、図示例のスプレーガン１０の蓋３０は、具体的には、筒状のナット部３２の軸線方向片端に、テーパ状の内側孔３１ａが貫設された蓋主壁部３１を有する概略構造となっている。そして、前記蓋３０は、ナット部３２の内周に形成されたねじ部３２ａ（内ねじ部）を、前記ガン胴体２４の前端部（ノズル２５側の端部）外周に形成されたねじ部２４ａ（外ねじ部）に螺合させてガン胴体２４前端部に取り付けられ、その内側にガン本体２０前端部のノズル２５を収納している。   As shown in FIG. 3, the lid 30 of the spray gun 10 in the illustrated example is specifically a lid main wall portion in which a tapered inner hole 31 a is provided at one end in the axial direction of a cylindrical nut portion 32. The schematic structure has 31. The lid 30 has a threaded portion 32a (inner threaded portion) formed on the inner periphery of the nut portion 32 and a threaded portion 24a formed on the outer periphery of the front end portion (end portion on the nozzle 25 side) of the gun body 24. The nozzle body 25 is attached to the front end portion of the gun body 24 by being screwed into the (external thread portion), and the nozzle 25 at the front end portion of the gun body 20 is housed inside the gun body 24.

図３に示すように、蓋主壁部３１の内側孔３１ａは、蓋主壁部３１の前記ナット部３２とは反対側の面（前面）からナット部３２側に行くにしたがって末広がりのテーパ状に形成されている。また、この内側孔３１ａは、蓋主壁部３１の前面側中央部に開口する開口部３１ｂを有している。   As shown in FIG. 3, the inner hole 31 a of the lid main wall portion 31 has a tapered shape that expands toward the nut portion 32 side from the surface (front surface) opposite to the nut portion 32 of the lid main wall portion 31. Is formed. Further, the inner hole 31 a has an opening 31 b that opens at the center on the front side of the lid main wall 31.

ガン本体２０のノズル２５は先細りのテーパ状に形成されている。
蓋３０の蓋主壁部３１の内側孔３１ａの後端外周（ナット部３２側の端部の外周）は、ノズル２５の外周付近に位置する。内側孔３１ａ内面とノズル２５との間には隙間１１ａが確保されている。
このスプレーガン１０は、前記蓋３０の内側に、前記隙間１１ａを含む開口凹部１１を有している。蓋主壁部３１の内側孔３１ａの開口部３１ｂは、前記開口凹部１１の開口部として機能する。以下、内側孔３１ａの開口部３１ｂを、開口凹部１１の開口部１１ｂとも言う。 The nozzle 25 of the gun body 20 is formed in a tapered shape.
The rear outer periphery of the inner hole 31 a of the lid main wall portion 31 of the lid 30 (the outer periphery of the end portion on the nut portion 32 side) is located near the outer periphery of the nozzle 25. A gap 11 a is secured between the inner surface of the inner hole 31 a and the nozzle 25.
The spray gun 10 has an opening recess 11 including the gap 11 a inside the lid 30. The opening 31 b of the inner hole 31 a of the lid main wall portion 31 functions as the opening of the opening recess 11. Hereinafter, the opening 31b of the inner hole 31a is also referred to as the opening 11b of the opening recess 11.

ガン本体２０において、塗料流路２１は、ガン本体２０の前後方向、すなわち蓋３０の蓋主壁部３１の内側孔３１ａの中心軸線の仮想延長に沿う方向に延在形成され、ガン本体２０に貫設されている。塗料流路２１は、ガン本体２０を構成するガン胴体２４及びノズル２５を貫通して形成されている。
なお、図示例のスプレーガン１０において、ガン本体２０のノズル２５の中心軸線は、前記開口凹部１１の中心軸線（蓋３０の蓋主壁部３１の内側孔３１ａの中心軸線）に揃えられている。 In the gun body 20, the paint channel 21 is formed to extend in the front-rear direction of the gun body 20, that is, in the direction along the virtual extension of the central axis of the inner hole 31 a of the lid main wall portion 31 of the lid 30. It is penetrating. The paint channel 21 is formed through the gun body 24 and the nozzle 25 that constitute the gun body 20.
In the illustrated spray gun 10, the central axis of the nozzle 25 of the gun body 20 is aligned with the central axis of the opening recess 11 (the central axis of the inner hole 31 a of the lid main wall portion 31 of the lid 30). .

図１に示すように、図示例のガン本体２０は、開口凹部１１の中心軸線（具体的には開口凹部１１（図３参照）の中心軸線及びその仮想延長。以下、同じ）に沿う方向を長手方向とする細長形状に構成されている。また、ガン本体２０のガン胴体２４も、開口凹部１１の中心軸線に沿う方向を長手方向とする細長形状に形成されている。ガン胴体２４の、開口凹部１１の中心軸線に垂直の断面中央部は、開口凹部１１の中心軸線の仮想延長上に位置している。
但し、ガン本体２０及びガン胴体２４の開口凹部１１の中心軸線の仮想延長に沿う方向の寸法（前後寸法）は適宜設定し得るものであり、ガン本体２０及びガン胴体２４は細長形状でなくても良い。 As shown in FIG. 1, the gun body 20 in the illustrated example has a direction along the center axis of the opening recess 11 (specifically, the center axis of the opening recess 11 (see FIG. 3) and its virtual extension; the same applies hereinafter). It is configured in an elongated shape in the longitudinal direction. The gun body 24 of the gun body 20 is also formed in an elongated shape with the direction along the central axis of the opening recess 11 as the longitudinal direction. The central section of the gun body 24 perpendicular to the central axis of the opening recess 11 is located on a virtual extension of the central axis of the opening recess 11.
However, the dimension (front-rear dimension) in the direction along the virtual extension of the central axis of the opening recess 11 of the gun body 20 and the gun body 24 can be set as appropriate, and the gun body 20 and the gun body 24 are not elongated. Also good.

また、前記塗料流路２１は、塗料入口２１ｃから塗料吐出孔２１ｂ前端の開口部までの途中で塗料の漏れを生じない。ガン胴体２４とノズル２５との間の境界、ガン胴体２４を構成する部材間の境界（ガン胴体を複数部材によって構成している場合）においては、必要に応じて、塗料流路２１からの塗料の漏れを防ぐ処置（Ｏリング（図３，図５の符号２８）の介挿等）を施す。   The paint flow path 21 does not cause paint leakage in the middle from the paint inlet 21c to the opening at the front end of the paint discharge hole 21b. In the boundary between the gun body 24 and the nozzle 25 and the boundary between the members constituting the gun body 24 (when the gun body is composed of a plurality of members), the paint from the paint flow path 21 is used as necessary. Measures to prevent leakage (such as insertion of an O-ring (reference numeral 28 in FIGS. 3 and 5)) are taken.

図１に示すように、前記塗料流路２１は、その前端部に、ノズル２５前端に開口する塗料吐出孔２１ｂを有し、この塗料吐出孔２１ｂとは反対の後端部に、塗料を導入するための塗料入口２１ｃを有している。
塗料入口２１ｃは、塗料流路２１後端部を拡張した拡張開口部であり、ガン本体２０の後端、すなわちガン本体２０のガン胴体２４の後端に開口している。この塗料入口２１ｃは、塗料流路２１において塗料吐出孔２１ｂと前記塗料入口２１ｃとの間に位置する部分である塗料流路主孔部２１ａに比べて断面積（流路断面積）が大きい。
一方、塗料吐出孔２１ｂは、前記塗料流路主孔部２１ａに比べて細い（断面積（流路断面積）が小さい）細孔となっている。 As shown in FIG. 1, the paint channel 21 has a paint discharge hole 21b opened at the front end of the nozzle 25 at the front end thereof, and the paint is introduced into the rear end opposite to the paint discharge hole 21b. It has a paint inlet 21c for this purpose.
The paint inlet 21 c is an expanded opening that is an extension of the rear end of the paint channel 21, and opens at the rear end of the gun body 20, that is, the rear end of the gun body 24 of the gun body 20. The paint inlet 21c has a larger cross-sectional area (flow passage cross-sectional area) than the paint flow passage main hole portion 21a which is a portion of the paint flow passage 21 located between the paint discharge hole 21b and the paint inlet 21c.
On the other hand, the paint discharge hole 21b is a narrower (smaller cross-sectional area (channel cross-sectional area)) pore than the paint flow path main hole 21a.

ガン本体２０の複数本（図示例では４本）の塗料流路２１のガン胴体２４に位置する部分は、ガン胴体２４の、開口凹部１１の中心軸線に垂直の断面中央の周囲に分散配置されている。また、塗料流路２１のガン胴体２４に位置する部分は、開口凹部１１の中心軸線の仮想延長の周囲に分散配置されている。
図２に示すように、図示例のガン本体２０の塗料流路２１の塗料入口２１ｃは、ガン胴体２４の後端面２４ｂ（具体的には、ガン胴体本体２４１のノズル２５とは反対側の端面）の外周部に分散配置されている。 The portions of the gun body 20 that are located in the gun body 24 of the plurality (four in the illustrated example) of the paint channel 21 are distributed around the center of the cross section perpendicular to the central axis of the opening recess 11 of the gun body 24. ing. Further, the portion of the paint channel 21 located on the gun body 24 is distributed around the virtual extension of the central axis of the opening recess 11.
As shown in FIG. 2, the paint inlet 21c of the paint flow path 21 of the gun body 20 in the illustrated example is the rear end face 24b of the gun body 24 (specifically, the end face opposite to the nozzle 25 of the gun body 241). ) Are distributed on the outer periphery.

図示例のスプレーガン１０のノズル２５は、その前端に、該ノズル２５の中心軸線に垂直に形成された前端面２５ａを有している。ガン本体２０の複数の塗料流路２１の前記塗料吐出孔２１ｂは、それぞれノズル２５の前端面２５ａ開口している。   The nozzle 25 of the spray gun 10 of the illustrated example has a front end face 25 a formed perpendicularly to the central axis of the nozzle 25 at the front end. The paint discharge holes 21b of the plurality of paint passages 21 of the gun body 20 are open to the front end face 25a of the nozzle 25, respectively.

ガン本体２０において、霧化用エア流路２２は、前記ガン本体２０（詳細にはエア流路形成部材２４２）の外周面に開口するエア入口２２ａ（霧化用エア入口）を有し、このエア入口２２ａから前記開口凹部１１まで延在形成されている。霧化用エア流路２２は、前記開口凹部１１に開口する霧化用エア噴射口２２ｂを有している。図示例のガン本体２０において、霧化用エア流路２２は、その流路長手方向の一部がノズル２５を貫通しており、前記霧化用エア噴射口２２ｂはノズル２５に形成されている。   In the gun body 20, the atomizing air flow path 22 has an air inlet 22a (atomizing air inlet) that opens to the outer peripheral surface of the gun main body 20 (specifically, the air flow path forming member 242). It extends from the air inlet 22 a to the opening recess 11. The atomizing air flow path 22 has an atomizing air injection port 22 b that opens to the opening recess 11. In the gun body 20 of the illustrated example, the atomizing air flow path 22 has a part of the flow path longitudinal direction passing through the nozzle 25, and the atomizing air injection port 22 b is formed in the nozzle 25. .

図３、図４に示すように、塗料流路２１の塗料吐出孔２１ｂは、スプレーガン１０前後方向において、開口凹部１１の開口部３１ｂに対応する位置に形成されている。複数の塗料流路２１に対応する複数の塗料吐出孔２１ｂは、スプレーガン１０前後方向において、開口凹部１１の開口部３１ｂに対応する位置、すなわち、スプレーガン１０を前側から見たときにノズル２５の中央部に集合させて形成されている。
これに対して、前記霧化用エア噴射口２２ｂは、スプレーガン１０を前側から見たときのノズル２５の前記塗料吐出孔２１ｂが形成されている中央部から外側、すなわち前記塗料吐出孔２１ｂに比べてノズル２５の中心軸線からの距離が大きい位置に開口されている。図示例のスプレーガン１０において、霧化用エア噴射口２２ｂは、スプレーガン１０を前側から見たときのノズル２５中央部に位置する前端面２５ａの周囲の３以上の箇所（図示例では４箇所）に形成されている。 As shown in FIGS. 3 and 4, the paint discharge hole 21 b of the paint channel 21 is formed at a position corresponding to the opening 31 b of the opening recess 11 in the front-rear direction of the spray gun 10. The plurality of paint discharge holes 21b corresponding to the plurality of paint passages 21 are arranged in the front-rear direction of the spray gun 10 at positions corresponding to the openings 31b of the opening recesses 11, that is, when the spray gun 10 is viewed from the front side. It is formed by gathering at the central part.
On the other hand, the atomizing air injection port 22b is formed on the outer side from the central portion where the paint discharge hole 21b of the nozzle 25 is formed when the spray gun 10 is viewed from the front side, that is, from the paint discharge hole 21b. Compared with the central axis of the nozzle 25, the opening is made at a position where the distance is large. In the spray gun 10 of the illustrated example, the atomizing air injection port 22b has three or more locations (four locations in the illustrated example) around the front end surface 25a located at the center of the nozzle 25 when the spray gun 10 is viewed from the front side. ).

図示例のスプレーガン１０において、前記霧化用エア流路２２は、前記ガン本体２０内にて分岐されて、ひとつのエア入口２２ａに対して複数の霧化用エア噴射口２２ｂを有している。図示例のスプレーガン１０のガン本体２０は、ひとつのエア入口２２ａに対して２つの霧化用エア噴射口２２ｂを有する霧化用エア流路２２を２本有し、合計４つの霧化用エア噴射口２２ｂを有している。
なお、塗料流路２１は、ガン本体２０内にて分岐されておらず、ひとつの塗料入口２１ｃに対してひとつの塗料吐出孔２１ｂを有する構成となっている。 In the illustrated spray gun 10, the atomizing air flow path 22 is branched in the gun body 20, and has a plurality of atomizing air injection ports 22b for one air inlet 22a. Yes. The gun body 20 of the illustrated spray gun 10 has two atomizing air flow paths 22 having two atomizing air injection ports 22b for one air inlet 22a, for a total of four atomizing objects. It has an air injection port 22b.
The paint channel 21 is not branched in the gun body 20, and has one paint discharge hole 21b for one paint inlet 21c.

このスプレーガン１０は、塗料流路２１にその塗料入口２１ｃから塗料を供給し、霧化用エア流路２２にそのエア入口２２ａから圧縮空気（霧化用エア）を供給することで、塗料流路２１の塗料吐出孔２１ｂからの吐出塗料を、霧化用エア流路２２の霧化用エア噴射口２２ｂから開口凹部２１内に噴射された圧縮空気によって霧化し、この霧化された塗料（以下、霧化塗料とも言う）を開口凹部１１の開口部３１ｂから噴射する。   The spray gun 10 supplies paint to the paint channel 21 from the paint inlet 21c, and supplies compressed air (atomization air) to the atomizing air channel 22 from the air inlet 22a. The paint discharged from the paint discharge hole 21b of the passage 21 is atomized by the compressed air injected into the opening recess 21 from the atomization air injection port 22b of the atomization air flow path 22, and the atomized paint ( Hereinafter, it is also referred to as atomized paint) from the opening 31b of the opening recess 11.

図３、図４に示すように、図示例のスプレーガン１０において、パターンエア流路２３は、前記ガン本体２０（詳細にはエア流路形成部材２４２）の外周面に開口する一端の開口部であるエア入口２３ａ（パターンエア入口から、蓋３０に形成された他端側の開口部であるパターンエア噴射口２３ｂにわたって延在形成されている。
蓋３０の蓋体主板部３１には、その開口部３１ｂを介して両側から前側（ナット部３２とは反対の側）に突出する一対の突部３３が形成されている。パターンエア噴射口２３ｂは、具体的には、前記蓋３０の前記一対の突部３３の互いに対向する側の面に開口されている。パターンエア噴射口２３ｂは、エア入口２３ａからパターンエア流路２３に導入された圧縮空気（パターンエア）を、前記開口凹部１１の開口部３１ｂから噴射される霧化塗料の噴射流、あるいはその近傍に向けて噴射できる。 As shown in FIGS. 3 and 4, in the illustrated spray gun 10, the pattern air flow path 23 is an opening at one end that opens to the outer peripheral surface of the gun body 20 (specifically, the air flow path forming member 242). The air inlet 23a (which extends from the pattern air inlet to the pattern air injection port 23b which is an opening on the other end side formed in the lid 30.
The lid main plate portion 31 of the lid 30 is formed with a pair of projecting portions 33 projecting from both sides to the front side (the side opposite to the nut portion 32) through the opening 31b. Specifically, the pattern air injection port 23 b is opened on the surfaces of the pair of protrusions 33 of the lid 30 on the sides facing each other. The pattern air injection port 23b is a jet flow of atomized paint injected from the opening 31b of the opening recess 11 or the vicinity thereof with compressed air (pattern air) introduced from the air inlet 23a into the pattern air flow path 23. Can be sprayed toward.

前記蓋３０の突部３３は、パターンエアを噴射するためのパターンエア用ノズル部として機能する。
但し、パターンエア流路２３は、パターンエアを、前記開口凹部１１の開口部３１ｂから噴射される霧化塗料の噴射流、あるいはその近傍に向けて、パターンエア噴射口２３ｂから噴射できる構成であれば良く、その具体的構成は適宜設計変更可能である。
また、図示例のスプレーガン１０は、一対のパターンエア用ノズル部に対応して２本のパターンエア流路２３を有する構成となっているが、パターンエア流路２３は適宜変更可能である。 The protrusion 33 of the lid 30 functions as a pattern air nozzle for ejecting pattern air.
However, the pattern air flow path 23 may be configured so that the pattern air can be ejected from the pattern air ejection port 23b toward or near the spray flow of the atomized paint ejected from the opening 31b of the opening recess 11. The specific configuration may be changed as appropriate.
Moreover, although the spray gun 10 of the example of illustration becomes a structure which has the two pattern air flow paths 23 corresponding to a pair of nozzle part for pattern air, the pattern air flow path 23 can be changed suitably.

次に、スプレーガン１０の開閉弁４０について説明する。
図１、図５において、前記開閉弁４０は具体的には二方弁である。図６は、この開閉弁４０の具体例を示す。
図６に例示する開閉弁４０はエア駆動式の二方弁である。この開閉弁４０は、連通流路４１が貫通する弁箱４２と、前記連通流路４１の途中に設けられた弁座４３に接離する弁体４４及び該弁体４４が先端に取り付けられた弁棒４５と、この弁棒４５を移動して弁体４４を弁座４３に接離させる開閉駆動部４６とを有している。開閉駆動部４６は、前記弁棒４５の先端側とは反対の基端側が挿入されたケース４６ａ内に、弁体４４を弁座４３に向かって押圧するための弾性付勢力を弁棒４５に与える閉弁用スプリング４７、及びエア駆動式開弁機構４８を収納した構成になっている。エア駆動式開弁機構４８は、弁体４４が弁座４３に圧接状態にあるときに、圧縮ポンプ等の圧縮空気源からのエア圧（圧縮空気）の供給によって、弁棒４５を、前記閉弁用スプリング４７の弾性付勢力に抗して弁座４３から離隔させる方向（開弁方向）に移動して開弁する。 Next, the opening / closing valve 40 of the spray gun 10 will be described.
1 and 5, the on-off valve 40 is specifically a two-way valve. FIG. 6 shows a specific example of the on-off valve 40.
The on-off valve 40 illustrated in FIG. 6 is an air-driven two-way valve. The on-off valve 40 has a valve box 42 through which the communication channel 41 passes, a valve body 44 that contacts and separates from a valve seat 43 provided in the middle of the communication channel 41, and the valve body 44 attached to the tip. It has a valve stem 45 and an opening / closing drive unit 46 that moves the valve stem 45 to bring the valve body 44 into and out of contact with the valve seat 43. The opening / closing drive unit 46 applies an elastic urging force to the valve stem 45 to press the valve body 44 toward the valve seat 43 in the case 46a in which the base end side opposite to the distal end side of the valve stem 45 is inserted. The valve closing spring 47 and the air-driven valve opening mechanism 48 are housed. The air-driven valve opening mechanism 48 closes the valve stem 45 by supplying air pressure (compressed air) from a compressed air source such as a compression pump when the valve body 44 is in pressure contact with the valve seat 43. The valve spring 47 moves and opens in a direction (valve opening direction) away from the valve seat 43 against the elastic biasing force of the valve spring 47.

この開閉弁４０は、エア駆動式開弁機構４８へのエア圧の供給が無いとき、閉弁用スプリング４７の弾性付勢力によって、弁体４４が弁座４３に圧接されて閉弁される。この開閉弁４０は、エア供給制御装置５４（図７参照）からのエア圧（圧縮空気）の供給のオンオフによって、連通流路４１の開閉切り換えを行える。   When the air pressure is not supplied to the air-driven valve opening mechanism 48, the on-off valve 40 is closed by the valve body 44 being pressed against the valve seat 43 by the elastic biasing force of the valve closing spring 47. The on-off valve 40 can switch between open and close of the communication channel 41 by turning on and off the supply of air pressure (compressed air) from the air supply control device 54 (see FIG. 7).

前記開閉弁４０は、塗料流路２１の途中に介在配置した弁箱４２の前記連通流路４１を、前記塗料流路２１の前記弁箱４２の両側に位置する部分に連通させて、ガン本体２０に固定して取り付けられている。
スプレーガン１０は、開閉弁４０の連通流路４１の開閉切り換えによって塗料流路２１を開閉を切り換えることができる。 The on-off valve 40 communicates the communication flow path 41 of the valve box 42 disposed in the middle of the paint flow path 21 with the portions of the paint flow path 21 located on both sides of the valve box 42 so as to connect the gun body. 20 is fixedly attached.
The spray gun 10 can switch between opening and closing of the paint channel 21 by switching between opening and closing of the communication channel 41 of the on-off valve 40.

ガン胴体２４（図示例ではガン胴体本体２４１）には、開閉弁４０の弁箱４２を塗料流路２１の途中に介挿するために、ガン胴体２４の外周面から窪んで塗料流路２１に達する弁箱収納凹所２４ｃが形成されている。弁箱４２は、前記弁箱収納凹所２４ｃに収納して、塗料流路２１の途中に設けられている。   In the gun body 24 (the gun body main body 241 in the illustrated example), the valve box 42 of the on-off valve 40 is inserted in the middle of the paint flow path 21 so as to be recessed from the outer peripheral surface of the gun body 24 into the paint flow path 21. A reaching valve box storage recess 24c is formed. The valve box 42 is housed in the valve box housing recess 24 c and is provided in the middle of the paint channel 21.

開閉弁４０の前記開閉駆動部４６は、ガン本体２０にその外周面から突出状態に設けられている。また、図示例のスプレーガン１０において、前記開閉弁４０は、具体的にはガン本体２０のガン胴体２４、さらに詳しくはガン胴体２４のガン胴体本体２４１に取り付けられており、前記弁箱４０ａを塗料流路２１のガン胴体本体２４１に位置する部分に介在配置して設けられている。   The opening / closing drive part 46 of the opening / closing valve 40 is provided on the gun body 20 so as to protrude from the outer peripheral surface thereof. Further, in the illustrated spray gun 10, the on-off valve 40 is specifically attached to the gun body 24 of the gun body 20, more specifically, to the gun body 241 of the gun body 24, and the valve box 40a is attached to the gun body 24. The paint channel 21 is provided so as to be interposed in a portion located in the gun body main body 241.

図示例の開閉弁４０は、開閉駆動部４６に弁箱４２を固定した構成のユニットとなっている。そして、この開閉弁４０は、開閉駆動部４６をねじ４９を用いてガン胴体２４にねじ止めしてガン本体２０に取り付けられている。
図示例のスプレーガン１０において、開閉駆動部４６のケース４６ａの外側には、ガン胴体２４に当接されるフランジ部４６ｂが突設されている。前記ねじ４９は、開閉駆動部４６のケース４６ａの前記フランジ部４６ｂに貫通させた軸部４９ａをガン胴体２４に形成された雌ねじ孔にねじ込み、前記軸部４９ａの片端に該軸部４９ａに比べて太く形成された頭部４９ｂによって前記フランジ部４６ｂをガン胴体２４に押さえ込んで、開閉駆動部４６をガン胴体２４に固定している。
前記ねじ４９はその頭部４９ｂに回転操作用の工具を係合させて回転操作することで、ガン胴体２４に対して着脱できる。開閉弁４０は、ねじ４６ｂをガン胴体２４に対するねじ込み時とは逆向きに回転操作してガン胴体２４から抜き出すことで、ガン本体２０から簡単に離脱させることができる。このため、このスプレーガン１０は、開閉弁４０のメンテナンスや交換を簡単に行える。 The opening / closing valve 40 in the illustrated example is a unit having a configuration in which a valve box 42 is fixed to an opening / closing drive unit 46. The opening / closing valve 40 is attached to the gun body 20 by screwing the opening / closing drive unit 46 to the gun body 24 using screws 49.
In the illustrated spray gun 10, a flange portion 46 b that abuts against the gun body 24 projects from the outside of the case 46 a of the opening / closing drive portion 46. The screw 49 is screwed into a female screw hole formed in the gun body 24 with a shaft portion 49a penetrating the flange portion 46b of the case 46a of the opening / closing drive portion 46, and compared with the shaft portion 49a at one end of the shaft portion 49a. The flange portion 46b is pressed against the gun body 24 by a thick head 49b, and the opening / closing drive portion 46 is fixed to the gun body 24.
The screw 49 can be attached to and detached from the gun body 24 by rotating the screw 49 with a tool for rotating operation engaged with the head 49b. The on-off valve 40 can be easily detached from the gun body 20 by rotating the screw 46b in a direction opposite to that when screwed into the gun body 24 and extracting it from the gun body 24. For this reason, the spray gun 10 can easily perform maintenance and replacement of the on-off valve 40.

なお、開閉弁をガン本体にねじ止め等によって取り外し可能に固定する構成は、本発明に係る実施形態のスプレーガンに広く適用可能である。   Note that the structure in which the on-off valve is detachably fixed to the gun body by screwing or the like is widely applicable to the spray gun according to the embodiment of the present invention.

既述のように、ガン本体２０に複数形成された塗料流路２１のガン胴体２４に位置する部分は、開口凹部１１の中心軸線の仮想延長の周囲に分散配置されており、個々の塗料流路２１に設けられた開閉弁４０は、開口凹部１１の中心軸線の仮想延長の周囲の複数箇所に分散配置されている。
図１、図２に示すように、図示例のスプレーガン１０は、ガン本体２０の複数の塗料流路２１の個々に設けられた開閉弁４０の前記開閉駆動部４６が、ガン本体２０から放射状に突出された構成になっている。 As described above, the portion of the paint flow path 21 formed in the gun body 20 that is located in the gun body 24 is distributed around the virtual extension of the central axis of the opening recess 11, and each paint flow The on-off valves 40 provided in the passage 21 are distributed at a plurality of locations around the virtual extension of the central axis of the opening recess 11.
As shown in FIGS. 1 and 2, in the illustrated spray gun 10, the opening / closing drive portion 46 of the opening / closing valve 40 provided individually for each of the plurality of paint passages 21 of the gun body 20 is radial from the gun body 20. It has a configuration protruding.

図７は、上述のスプレーガン１０を用いて構成した塗装システム５０の一例を示す。
図７に例示した塗装システム５０は、前記スプレーガン１０と、スプレーガン１０の塗料流路２１に塗料を供給する塗料供給装置５２と、圧縮空気源５３（例えば圧縮ポンプ）と、スプレーガン１０の霧化用エア流路２２、パターンエア流路２３、開閉弁４０のエア駆動式開弁機構４８への圧縮空気の供給を制御するエア供給制御装置５４とを有している。また、図示例の塗装システム５０はスプレーガン１０を支持するガン支持装置５５を含む。 FIG. 7 shows an example of a coating system 50 configured using the spray gun 10 described above.
The coating system 50 illustrated in FIG. 7 includes the spray gun 10, a paint supply device 52 that supplies paint to the paint flow path 21 of the spray gun 10, a compressed air source 53 (for example, a compression pump), and the spray gun 10. An atomization air flow path 22, a pattern air flow path 23, and an air supply control device 54 that controls the supply of compressed air to the air-driven valve opening mechanism 48 of the on-off valve 40. The illustrated painting system 50 includes a gun support device 55 that supports the spray gun 10.

塗料供給装置５２は、多色塗装用のスプレーガン１０の塗料流路２１と同数の塗料タンクＴ１、Ｔ２、Ｔ３、Ｔ４と、各塗料タンクＴ１〜Ｔ４に対応して設けられたポンプＰ１、Ｐ２、Ｐ３、Ｐ４とを有し、個々のポンプＰ１〜Ｐ４に接続された可撓性のホース５６（５６ａ、５６ｂ、５６ｃ、５６ｄ）を介して、スプレーガン１０の各塗料流路２１に塗料を送給する。図１に示すように、ホース５６ａ〜５６ｄは、塗料流路２１の塗料入口２１ｃに接続される。   The paint supply device 52 includes the same number of paint tanks T1, T2, T3, and T4 as the paint channels 21 of the spray gun 10 for multicolor painting, and pumps P1 and P2 provided corresponding to the paint tanks T1 to T4. , P3, and P4, and paint is applied to each paint flow path 21 of the spray gun 10 through flexible hoses 56 (56a, 56b, 56c, 56d) connected to the individual pumps P1 to P4. To send. As shown in FIG. 1, the hoses 56 a to 56 d are connected to the paint inlet 21 c of the paint channel 21.

図７に示すように、エア供給制御装置５４は、圧縮空気源５３から供給された圧縮空気が流入する複数の内部流路Ｒ１〜Ｒ８と、各内部流路Ｒ１〜Ｒ８に設けられた開閉弁Ｂ１〜Ｂ８（以下、エア制御用開閉弁とも言う）とを有している。各内部流路Ｒ１〜Ｒ８は、一端が配管５１を介して圧縮空気源５３と接続され、他端が可撓性のホース５８ａ〜５８ｄ、５９ａ〜５９ｄを介してスプレーガン１０の霧化用エア流路２２、パターンエア流路２３、エア駆動式開弁機構４８にそれぞれ接続されている。   As shown in FIG. 7, the air supply control device 54 includes a plurality of internal flow paths R1 to R8 into which compressed air supplied from the compressed air source 53 flows, and open / close valves provided in the internal flow paths R1 to R8. B1 to B8 (hereinafter also referred to as air control on-off valves). Each of the internal flow paths R1 to R8 has one end connected to the compressed air source 53 via the pipe 51 and the other end connected to the compressed air source 53 via the flexible hoses 58a to 58d and 59a to 59d. The flow path 22, the pattern air flow path 23, and the air drive type valve opening mechanism 48 are connected to each other.

スプレーガン１０のガン本体２０には、エア供給制御装置５４からホース５９（５９ａ〜５９ｄ）を介して供給される圧縮空気を開閉弁４０のエア駆動式開弁機構４８に導くためのエア流路２９（図７参照）が個々の開閉弁４０に対応して形成されている。各エア流路２９は、ガン胴体２４に形成された孔であり、ガン胴体の後端面２４ｂ（ガン本体２０の後端面）に開口するエア入口２９ａ（図２参照）から導入された圧縮空気を開閉弁４０のエア駆動式開弁機構４８に導く。図１、図７に示すように、エア供給制御装置５４から開閉弁４０のエア駆動式開弁機構４８へ圧縮空気を供給するためのホース５９（５９ａ〜５９ｄ）は、エア供給制御装置５４とは反対側の端部がエア流路２９のエア入口２９ａに接続されている。開閉弁４０のエア駆動式開弁機構４８には、、ホース５９（５９ａ〜５９ｄ）、及びエア流路２９を介してエア供給制御装置５４から圧縮空気を供給できる。   An air flow path for guiding the compressed air supplied from the air supply control device 54 via the hose 59 (59a to 59d) to the air-driven valve opening mechanism 48 of the on-off valve 40 in the gun body 20 of the spray gun 10. 29 (see FIG. 7) is formed corresponding to each on-off valve 40. Each air flow path 29 is a hole formed in the gun body 24, and compressed air introduced from an air inlet 29 a (see FIG. 2) opened to the rear end surface 24 b (the rear end surface of the gun body 20) of the gun body. The air-driven valve opening mechanism 48 of the on-off valve 40 is guided. As shown in FIGS. 1 and 7, hoses 59 (59 a to 59 d) for supplying compressed air from the air supply control device 54 to the air-driven valve opening mechanism 48 of the on-off valve 40 include the air supply control device 54 and the air supply control device 54. The opposite end is connected to the air inlet 29 a of the air flow path 29. Compressed air can be supplied from the air supply control device 54 to the air-driven valve opening mechanism 48 of the on-off valve 40 via the hose 59 (59a to 59d) and the air flow path 29.

図７に例示した塗装システム５０は、図１〜図５に例示したスプレーガン１０の２本の霧化用エア流路２２と、２本のパターンエア流路２３と、４つの開閉弁４０とに対応して、８本の内部流路Ｒ１〜Ｒ８を有するエア供給制御装置５４を採用している。
スプレーガン１０の２本の霧化用エア流路２２は、ホース５８ａ、５８ｂを介して、エア供給制御装置５４の内部流路Ｒ１、Ｒ２と接続され、スプレーガン１０の２本のパターンエア流路２３は、ホース５８ｃ、５８ｄを介して、エア供給制御装置５４の内部流路Ｒ３、Ｒ４と接続されている。スプレーガン１０の複数の開閉駆動部４６のエア駆動式開弁機構４８は、ホース５９（５９ａ〜５９ｄ）を介してエア供給制御装置５４の内部流路Ｒ５〜Ｒ８と接続されている。 The coating system 50 illustrated in FIG. 7 includes two atomizing air passages 22, two pattern air passages 23, and four on-off valves 40 of the spray gun 10 illustrated in FIGS. 1 to 5. In response to this, an air supply control device 54 having eight internal flow paths R1 to R8 is employed.
The two atomizing air flow paths 22 of the spray gun 10 are connected to the internal flow paths R1 and R2 of the air supply control device 54 via the hoses 58a and 58b. The path 23 is connected to the internal flow paths R3 and R4 of the air supply control device 54 via hoses 58c and 58d. The air-driven valve opening mechanisms 48 of the plurality of opening / closing drive units 46 of the spray gun 10 are connected to the internal flow paths R5 to R8 of the air supply control device 54 via hoses 59 (59a to 59d).

圧縮空気源５３から供給される圧縮空気は、配管５１から、エア供給制御装置５４に設けられた分岐器５４ｗを介して各内部流路Ｒ１〜Ｒ８に供給される。スプレーガン１０の霧化用エア流路２２、パターンエア流路２３、エア駆動式開弁機構４８に接続されたホース５８ａ〜５８ｄ、５９ａ〜５９ｄは、エア供給制御装置５４に複数の内部流路Ｒ１〜Ｒ８の個々に対応して設けられた接続ポート５４ａ〜５４ｈにて各内部流路Ｒ１〜Ｒ８と接続されている。   Compressed air supplied from the compressed air source 53 is supplied from the pipe 51 to the internal flow paths R1 to R8 via a branching device 54w provided in the air supply control device 54. The hose 58a to 58d and 59a to 59d connected to the atomizing air flow path 22, the pattern air flow path 23, and the air drive type valve opening mechanism 48 of the spray gun 10 are connected to the air supply control device 54 by a plurality of internal flow paths. The connection ports 54a to 54h provided corresponding to the individual R1 to R8 are connected to the internal flow paths R1 to R8.

また、エア供給制御装置５４の内部流路Ｒ１〜Ｒ８のうち、エア駆動式開弁機構４８への圧縮空気供給用のホース５９ａ〜５９ｄと接続された内部流路Ｒ５〜Ｒ８には、開閉弁Ｂ５〜Ｂ８から圧縮供給方向下流側に、該内部流路Ｒ５〜Ｒ８から分岐した排気流路ｖを開閉して、排気流路ｖの大気開放と閉止とを切り換える圧縮空気放出用開閉弁Ｄが設けられている。排気流路ｖは圧縮空気放出用開閉弁Ｄの開弁によって大気開放される。
エア供給制御装置５４において圧縮空気放出用開閉弁Ｄは、エア制御用開閉弁Ｂ５〜Ｂ８の閉弁に連動して開弁され、エア制御用開閉弁Ｂ５〜Ｂ８の開弁に連動して閉弁される。図示例の塗装システム５０は、エア供給制御装置５４のエア制御用開閉弁Ｂ５〜Ｂ８の閉弁に連動して圧縮空気放出用開閉弁Ｄが開弁されることで、開閉弁Ｂ５〜Ｂ８からエア駆動式開弁機構４８へホース５９ａ〜５９ｄを介して圧縮空気を供給する流路（圧縮空気供給流路）を大気開放する。スプレーガン１０の開閉弁４０は、圧縮空気供給流路が大気開放されると、エア駆動式開弁機構４８へのエア圧の供給が無い状態になる結果、閉弁する。 Among the internal flow paths R1 to R8 of the air supply control device 54, the internal flow paths R5 to R8 connected to the compressed air supply hoses 59a to 59d to the air-driven valve opening mechanism 48 include open / close valves. On the downstream side in the compression supply direction from B5 to B8, there is provided a compressed air discharge on-off valve D that opens and closes the exhaust flow path v branched from the internal flow paths R5 to R8 and switches the exhaust flow path v between open and closed. Is provided. The exhaust passage v is opened to the atmosphere by opening the on-off valve D for releasing compressed air.
In the air supply control device 54, the on-off valve D for releasing compressed air is opened in conjunction with closing of the on-off valves B5 to B8 for air control, and closed in conjunction with opening of the on-off valves B5 to B8 for air control. To be spoken. The coating system 50 of the illustrated example opens the on-off valves B5 to B8 by opening the on-off valves D5 for compressed air release in conjunction with the closing of the on-off valves B5 to B8 for air control of the air supply control device 54. A flow path (compressed air supply flow path) for supplying compressed air to the air-driven valve opening mechanism 48 via the hoses 59a to 59d is opened to the atmosphere. The on-off valve 40 of the spray gun 10 closes as a result of no air pressure being supplied to the air-driven valve opening mechanism 48 when the compressed air supply passage is opened to the atmosphere.

なお、図７では、エア駆動式開弁機構４８への圧縮空気供給用の複数（図示例では４本）の内部流路Ｒ５〜Ｒ８のうち、符号Ｒ５〜Ｒ７の内部流路の排気流路ｖに設けられた圧縮空気放出用開閉弁Ｄの図示を省略している。圧縮空気放出用開閉弁Ｄは、エア駆動式開弁機構４８への圧縮空気供給用の複数の内部流路Ｒ５〜Ｒ８のそれぞれに設けられている。   In FIG. 7, among the plural (four in the illustrated example) internal flow paths R5 to R8 for supplying compressed air to the air-driven valve opening mechanism 48, the exhaust flow paths of the internal flow paths denoted by R5 to R7. Illustration of the on-off valve D for releasing compressed air provided at v is omitted. The compressed air discharge opening / closing valve D is provided in each of the plurality of internal flow paths R <b> 5 to R <b> 8 for supplying compressed air to the air-driven valve opening mechanism 48.

エア供給制御装置５４は、エア制御用開閉弁Ｂ１〜Ｂ８の開閉制御によって、スプレーガン１０の霧化用エア流路２２、パターンエア流路２３、エア駆動式開弁機構４８への圧縮空気の供給、供給停止を切り換える（圧縮空気の供給制御を行う）ことができる。
なお、これらエア制御用開閉弁Ｂ１〜Ｂ８は、その開閉動作を個々に独立して制御できる。但し、エア供給制御装置５４は、複数のエア制御用開閉弁Ｂ１〜Ｂ８のうちの複数の開閉を互いに同時に行える構成となっていても良い。
また、霧化用エア流路２２への圧縮空気の供給制御のエア制御用開閉弁Ｂ１、Ｂ２、及びパターンエア流路２３への圧縮空気の供給制御用のエア制御用開閉弁Ｂ３、Ｂ４は、開弁時の圧縮空気の流量設定を適宜変更可能なものを採用することが好ましい。
図示例のエア供給制御装置５４において、エア駆動式開弁機構４８への圧縮空気の供給制御用のエア制御用開閉弁Ｂ５〜Ｂ８としては、その開閉によって圧縮空気の供給のオンオフ（供給、供給停止）切り換えを迅速に行える構成のものを好適に採用できる。このエア制御用開閉弁Ｂ５〜Ｂ８としては、圧縮空気の供給のオンオフ（供給、供給停止）切り換えを行えるものであれば足り、開弁時の圧縮空気の流量設定の変更機能を有していないものも採用可能である。 The air supply control device 54 controls the opening and closing of the air control on-off valves B1 to B8 to supply the compressed air to the atomizing air passage 22, the pattern air passage 23, and the air-driven valve opening mechanism 48 of the spray gun 10. Supply and supply stop can be switched (compressed air supply control is performed).
Note that these air control on-off valves B1 to B8 can individually control their opening and closing operations. However, the air supply control device 54 may be configured to be able to simultaneously open and close a plurality of the air control on-off valves B1 to B8.
Further, the air control on-off valves B1 and B2 for controlling the supply of compressed air to the atomizing air flow path 22 and the air control on-off valves B3 and B4 for controlling the supply of compressed air to the pattern air flow path 23 are It is preferable to employ one that can appropriately change the flow rate setting of the compressed air when the valve is opened.
In the air supply control device 54 of the illustrated example, the air control on-off valves B5 to B8 for controlling the supply of compressed air to the air-driven valve opening mechanism 48 are turned on and off (supply and supply) by opening and closing them. It is possible to suitably employ a configuration that can quickly perform (stop) switching. The air control on-off valves B5 to B8 need only be capable of switching on / off (supply and supply stop) the supply of compressed air, and do not have a function of changing the flow rate of compressed air when the valve is opened. Can also be adopted.

スプレーガン１０の各開閉弁４０の開閉駆動部４６のエア駆動式開弁機構４８は、エア制御用開閉弁Ｂ５〜Ｂ８が開弁され、ホース５９（５９ａ〜５９ｄ）を介してエア供給制御装置５４から圧縮空気が供給されることで、開閉弁４０を開弁する。
エア供給制御装置５４は、スプレーガンの前記空気流路に圧縮空気を供給する霧化用圧縮空気供給装置、及び前記スプレーガンの開閉弁の動作を制御して前記塗料流路の開閉を切り換える開閉制御装置を兼ねる。 In the air drive type valve opening mechanism 48 of the opening / closing drive part 46 of each on-off valve 40 of the spray gun 10, the air control on-off valves B5 to B8 are opened, and the air supply control device is provided via the hose 59 (59a to 59d). When the compressed air is supplied from 54, the on-off valve 40 is opened.
The air supply control device 54 controls the operation of the atomizing compressed air supply device that supplies compressed air to the air flow path of the spray gun, and the opening and closing valves of the spray gun to switch the opening and closing of the paint flow path. Also serves as a control device.

ガン支持装置５５はスプレーガン１０を固定するガン取付部材５５ａを有している。ガン取付部材５５ａの形状には特には限定は無い。
図１に示すように、図示例のスプレーガン１０は、ガン本体２０の後端部外周に突設されている固定用突部２６を前記ガン取付部材５５ａに固定して、ガン支持装置５５に取り付けることができる。図示例の固定用突部２６には、棒状に形成されたガン取付部材５５ａを挿入可能な取付部材挿入孔２６ａが形成されている。また、この固定用突部２６の外面には、前記取付部材挿入孔２６ａの内周面から延在形成されたねじ孔２６ｂが開口されている。スプレーガン１０は、前記取付部材挿入孔２６ａに挿入されたガン取付部材５５ａを、前記ねじ孔２６ｂにねじ込んだ固定ねじ２６ｃによって固定することで、ガン支持装置５５に取り付けることができる。
また、図１、図２に示すように、前記スプレーガン１０は、ガン本体２０のガン胴体２４にその後端面２４ａ（具体的には、ガン胴体本体２４１のノズル２５とは反対側の端面）の中央部から窪んで形成された穴部２７をガン取付部材５５ａへの固定に利用することも可能である。 The gun support device 55 has a gun attachment member 55 a for fixing the spray gun 10. The shape of the gun mounting member 55a is not particularly limited.
As shown in FIG. 1, the spray gun 10 in the illustrated example has a fixing protrusion 26 protruding from the outer periphery of the rear end portion of the gun body 20 fixed to the gun mounting member 55a. Can be attached. The fixing projection 26 in the illustrated example is formed with an attachment member insertion hole 26a into which a gun attachment member 55a formed in a rod shape can be inserted. Further, a screw hole 26b is formed on the outer surface of the fixing projection 26 so as to extend from the inner peripheral surface of the mounting member insertion hole 26a. The spray gun 10 can be attached to the gun support device 55 by fixing the gun attachment member 55a inserted into the attachment member insertion hole 26a with a fixing screw 26c screwed into the screw hole 26b.
1 and 2, the spray gun 10 has a rear end surface 24a (specifically, an end surface opposite to the nozzle 25 of the gun body main body 241) on the gun body 24 of the gun main body 20. It is also possible to use the hole 27 formed in a recessed manner from the center for fixing to the gun attachment member 55a.

ガン支持装置５５は、例えば多軸ロボットアームの先端に前記ガン取付部材５５ａを有する多軸支持装置であるが、これに限定されない。ガン支持装置５５としては、前記ガン取付部材５５ａを有するものであれば特に限定は無く、例えばガン取付部材５５ａに固定されたスプレーガン１０を定位置で所的向きに支持するもの等であっても良い。   The gun support device 55 is, for example, a multi-axis support device having the gun mounting member 55a at the tip of a multi-axis robot arm, but is not limited thereto. The gun support device 55 is not particularly limited as long as it has the gun mounting member 55a. For example, the gun support device 55 supports the spray gun 10 fixed to the gun mounting member 55a in a fixed position at a fixed position. Also good.

前記スプレーガン１０は、ノズル２５への塗料の供給を制御する開閉弁４０をガン本体２０に設けた構成であるため、塗料の供給を制御する弁をスプレーガンの系外に設ける場合に比べて、塗料の供給を制御する弁（開閉弁４０）から塗料吐出孔２１ｂまでの距離を格段に短くすることができる。このため、このスプレーガン１０は、塗料の供給停止（開閉弁４０による塗料流路２１の閉止）後に塗料吐出孔２１ｂから吐出される塗料によるガン先の汚れ防止を簡単かつ確実に実現できる。
このスプレーガン１０を用いて構成した塗装システム５０は、圧縮エア（霧化用エア及び／又はパターンエア）の供給制御及び弁による塗料の供給制御の調整を行うことなく、塗料の供給停止後のガン先の汚れ防止を実現できる。また、この塗装システム５０は、塗料の供給を制御する弁（開閉弁４０）から塗料吐出孔２１ｂまでの距離を格段に短くできることで、開閉弁４０によって塗料流路２１を閉止することで、塗料の流量や物性（粘度等）に影響を受けることなく、塗料吐出孔２１ｂからの塗料の吐出停止を短時間で実現できる。 The spray gun 10 has a structure in which the on-off valve 40 for controlling the supply of paint to the nozzle 25 is provided in the gun body 20, so that the valve for controlling the supply of paint is provided outside the spray gun system. The distance from the valve for controlling the supply of paint (open / close valve 40) to the paint discharge hole 21b can be remarkably shortened. For this reason, the spray gun 10 can easily and reliably realize prevention of contamination of the gun tip by the paint discharged from the paint discharge hole 21b after the supply of paint is stopped (the paint flow path 21 is closed by the on-off valve 40).
The coating system 50 configured by using the spray gun 10 does not adjust the supply control of the compressed air (atomization air and / or pattern air) and the control of the supply of the paint by the valve. Prevents contamination of the gun tip. In addition, the coating system 50 can significantly reduce the distance from the valve (open / close valve 40) for controlling the supply of the paint to the paint discharge hole 21b, so that the paint passage 21 is closed by the open / close valve 40. Without being affected by the flow rate and physical properties (viscosity, etc.) of the coating material, it is possible to stop the discharge of the paint from the paint discharge hole 21b in a short time.

また、各開閉弁４０の開閉（図７に例示した塗装システム５０にあっては、エア供給制御装置５４のエア制御用開閉弁Ｂ５〜Ｂ８の開閉）は互いに同時に行うことが可能であり、開閉弁４０の開閉制御は単純化できる。   In addition, the opening / closing of each opening / closing valve 40 (in the painting system 50 illustrated in FIG. 7, the opening / closing of the air control opening / closing valves B5 to B8 of the air supply control device 54) can be performed simultaneously. The opening / closing control of the valve 40 can be simplified.

本発明に係るスプレーガンは、例えば図８に示すように開閉弁４０を塗料流路２１の流路長手方向後端部（塗料入口２１ｃ側）に介在配置した構成、及び図９に示すようにガン本体２０に組み付けて該ガン本体２０の後側に配置した開閉弁４０を介してホース５６から塗料がガン本体２０の塗料流路２１に導入されるようにした構成も採用可能である。
但し、このスプレーガン１０及び塗装システム５０は、塗料の供給を制御する弁（開閉弁４０）から塗料吐出孔２１ｂまでの距離を出来るだけ短くすることが、開閉弁４０による塗料流路２１の閉止後の塗料吐出孔２１ｂからの塗料吐出を確実に防止する点で有利である。この点、図１に例示したスプレーガン１０は、開閉弁４０を前記塗料流路２１の流路長手方向中央部に介在配置した構成であり、図８、図９に例示したスプレーガンに比べて、塗料の供給を制御する弁（開閉弁４０）から塗料吐出孔２１ｂまでの距離を短くできる分、開閉弁４０による塗料流路２１の閉止後の塗料吐出孔２１ｂからの塗料吐出防止に有利である。
また、ガン本体２０において、開閉弁４０は、塗料流路２１の流路長手方向中央部から前側（塗料吐出孔２１ｂ側）にずれた位置に介在しても良い。 In the spray gun according to the present invention, for example, as shown in FIG. 8, the on-off valve 40 is disposed at the rear end in the longitudinal direction of the paint passage 21 (on the paint inlet 21c side), and as shown in FIG. A configuration in which the paint is introduced from the hose 56 into the paint flow path 21 of the gun body 20 via the on-off valve 40 that is assembled to the gun body 20 and arranged on the rear side of the gun body 20 can also be adopted.
However, in the spray gun 10 and the coating system 50, the distance from the valve (open / close valve 40) for controlling the supply of paint to the paint discharge hole 21 b is shortened as much as possible to close the paint flow path 21 by the open / close valve 40. This is advantageous in that the paint discharge from the subsequent paint discharge hole 21b is reliably prevented. In this regard, the spray gun 10 illustrated in FIG. 1 has a configuration in which an on-off valve 40 is disposed at the center in the longitudinal direction of the paint flow channel 21, compared to the spray gun illustrated in FIGS. 8 and 9. Since the distance from the valve (open / close valve 40) for controlling the supply of paint to the paint discharge hole 21b can be shortened, it is advantageous for preventing the paint discharge from the paint discharge hole 21b after the paint flow path 21 is closed by the open / close valve 40. is there.
In the gun body 20, the on-off valve 40 may be interposed at a position shifted from the center in the longitudinal direction of the paint passage 21 to the front side (the paint discharge hole 21 b side).

開閉弁４０は、開口凹部１１の中心軸線の仮想延長の周囲の複数箇所に分散配置した構成は、ガン本体２０の複数の塗料流路２１のそれぞれに設けた開閉弁４０から塗料吐出孔２１ｂまでの距離の短縮に有効に寄与する。
本発明に係るスプレーガンは、ガン本体２０の複数の塗料流路２１のそれぞれに設けた開閉弁について、例えば、２以上の開閉弁がスプレーガン前後方向に配列され、スプレーガン前後方向における開閉弁の設置位置にばらつきが存在する構成も採用可能である。
これに対して、図１、図２に例示したスプレーガン１０は、ガン本体２０の複数の塗料流路２１の個々に設けられた開閉弁４０の前記開閉駆動部４６をガン本体２０から放射状に突出状態に配置した構成となっており、この構成により、すべての開閉弁４０をガン本体２０の前後方向中央部、塗料流路２１の流路長手方向中央部に配置することを実現している。したがって、前記スプレーガン１０は、ガン本体２０の複数の塗料流路２１のそれぞれに設けた開閉弁４０の全てについて、塗料吐出孔２１ｂまでの距離を短く抑えることができる。 The on-off valves 40 are distributed in a plurality of locations around the virtual extension of the central axis of the opening recess 11 from the on-off valves 40 provided in each of the plurality of paint channels 21 of the gun body 20 to the paint discharge holes 21b. This effectively contributes to shortening the distance.
In the spray gun according to the present invention, for example, two or more on-off valves are arranged in the front-rear direction of the spray gun, and the on-off valves in the front-rear direction of the spray gun are provided. It is also possible to adopt a configuration in which there is variation in the installation position of the.
On the other hand, in the spray gun 10 illustrated in FIGS. 1 and 2, the opening / closing drive portions 46 of the opening / closing valves 40 provided individually in the plurality of paint flow paths 21 of the gun body 20 are radiated from the gun body 20. It has a configuration arranged in a protruding state, and with this configuration, it is realized that all the on-off valves 40 are arranged in the central portion in the longitudinal direction of the gun body 20 and in the central portion in the longitudinal direction of the paint flow channel 21. . Therefore, the spray gun 10 can keep the distance to the paint discharge hole 21b short for all of the on-off valves 40 provided in each of the plurality of paint flow paths 21 of the gun body 20.

なお、上述の実施形態に限定されず、適宜設計変更可能である。
開閉弁４０としては、塗料流路に連通させた連通流路の開閉によって塗料流路を開閉できる構成のものであれば良く、上述の構成に限定されない。塗料流路に連通させる連通流路が貫設された弁箱と、弁体が取り付けられた弁棒を移動又は回転させて弁箱内の弁座に弁体を接離させることで連通流路を開閉する開閉駆動部（弁棒駆動部）とを有する構成の開閉弁（弁棒駆動形開閉弁）としては、例えば、ゲート弁、ボール弁、バタフライ弁等の弁にその弁棒を移動又は回転させる開閉駆動部を設けた構成のものを採用することも可能である。また、開閉弁としては、エア駆動式のものに限定されず、開閉用駆動源として電動モータを具備した構成のもの、電磁石への通電のオンオフによって開閉駆動する電磁弁等も採用可能である。 Note that the present invention is not limited to the above-described embodiment, and the design can be changed as appropriate.
The on-off valve 40 is not limited to the above-described configuration, as long as it has a configuration capable of opening and closing the paint channel by opening and closing the communication channel connected to the paint channel. By connecting or separating the valve body with the valve seat in the valve box by moving or rotating the valve box through which the communication flow path communicating with the paint flow path is provided, and the valve rod to which the valve body is attached. As an open / close valve (valve rod drive type open / close valve) having an open / close drive unit (valve rod drive unit) for opening and closing the valve, for example, the valve rod is moved to a valve such as a gate valve, a ball valve, a butterfly valve or the like. It is also possible to employ a configuration in which an opening / closing drive unit for rotation is provided. Further, the on-off valve is not limited to an air-driven type, and an opening / closing valve having an electric motor as an opening / closing drive source, an electromagnetic valve that is opened / closed by turning on / off the electromagnet, and the like can also be employed.

スプレーガンとしては、図１０に示すように、塗料流路２１（詳細にはその塗料入口）が、ガン胴体２４の外周に設けられた開閉弁４０を介して、塗料供給装置から塗料供給用のホース５６と接続され、開閉弁４０の開閉によって、塗料供給装置から塗料流路２１への塗料の供給と供給停止とが切り換えられる構成も採用可能である。   As shown in FIG. 10, as a spray gun, a paint channel 21 (specifically, a paint inlet) is provided for supplying paint from a paint supply device via an on-off valve 40 provided on the outer periphery of the gun body 24. It is also possible to adopt a configuration that is connected to the hose 56 and that can switch between supply and stop of supply of the paint from the paint supply device to the paint flow path 21 by opening and closing the on-off valve 40.

また、スプレーガンの塗料流路の数は４本に限定されず、１本あるいは４本以外の複数本であっても良い。塗料流路を開閉する開閉弁４０をガン本体に設ける構成は、塗料流路が１本のみ形成されたガン本体を用いる単色塗装用のスプレーガンにも適用可能である。単色塗装用のスプレーガンについても、開閉弁４０をガン本体に取り外し可能に固定する構造、ガン本体前後方向における開閉弁４０の取付位置は、多色塗装用のスプレーガンに適用可能なものを採用できる。   Further, the number of paint flow paths of the spray gun is not limited to four, and may be one or a plurality other than four. The configuration in which the on-off valve 40 for opening and closing the paint channel is provided in the gun body is also applicable to a spray gun for single color coating using a gun body in which only one paint channel is formed. Also for the spray gun for single color coating, a structure that detachably fixes the on-off valve 40 to the gun body, and the mounting position of the on-off valve 40 in the front-and-rear direction of the gun body is applicable to the spray gun for multi-color coating. it can.

図１等では、ガン本体２０内に屈曲部を有する塗料流路２１を形成した構成を例示したが、ガン本体２０としては塗料流路２１がガン本体２０の前後に真っ直ぐに形成されたものを採用することも可能である。塗料流路２１がガン本体２０の前後に真っ直ぐに形成された構成の場合は、開閉弁４０として弁箱４２の連通流路４１の両端が同一直線上に位置する構成のものを採用する。   In FIG. 1 and the like, the configuration in which the paint channel 21 having a bent portion is formed in the gun body 20 is illustrated. However, as the gun body 20, the gun channel 20 in which the paint channel 21 is formed straight before and after the gun body 20 is illustrated. It is also possible to adopt. In the case where the paint channel 21 is formed straight before and after the gun body 20, a configuration in which both ends of the communication channel 41 of the valve box 42 are located on the same straight line as the on-off valve 40 is employed.

１０…スプレーガン、１１…開口凹部、２０…ガン本体、２１…塗料流路、２１ｂ…塗料吐出孔、２２…空気流路（霧化用エア流路）、２３…パターンエア流路、２３ｂ…パターンエア噴射口、２４…ガン胴体、２５…ノズル、３０…蓋、３１ｂ…開口部、４０…開閉弁、５０…塗装システム，５２…塗料供給装置、５４…霧化用圧縮空気供給装置、開閉制御装置（エア供給制御装置）。   DESCRIPTION OF SYMBOLS 10 ... Spray gun, 11 ... Opening recessed part, 20 ... Gun main body, 21 ... Paint flow path, 21b ... Paint discharge hole, 22 ... Air flow path (atomization air flow path), 23 ... Pattern air flow path, 23b ... Pattern air injection port, 24 ... gun body, 25 ... nozzle, 30 ... lid, 31b ... opening, 40 ... open / close valve, 50 ... coating system, 52 ... paint supply device, 54 ... compressed air supply device for atomization, opening / closing Control device (air supply control device).

Claims (6)

塗料流路が複数形成されたボディに、前記塗料流路の片端の塗料吐出孔からの吐出塗料を霧化する圧縮空気が供給される空気流路を有し、霧化した塗料を噴射するスプレーガンであって、
前記ボディに、前記塗料流路を開閉する開閉弁が設けられているスプレーガン。 A spray for spraying atomized paint having an air flow path to which a compressed air for atomizing paint discharged from a paint discharge hole at one end of the paint flow path is supplied to a body in which a plurality of paint flow paths are formed Cancer,
A spray gun in which the body is provided with an on-off valve for opening and closing the paint channel. 前記塗料流路は前記ボディにおいて前記塗料吐出孔とは反対の後側に形成された塗料入口からボディ前側の前記塗料吐出孔にわたって延在形成され、前記開閉弁は、前記塗料流路の流路長手方向中央部あるいは該流路長手方向中央部から前側に介在されている請求項１に記載のスプレーガン。   The paint channel extends from the paint inlet formed on the rear side opposite to the paint discharge hole in the body to the paint discharge hole on the front side of the body, and the opening / closing valve The spray gun according to claim 1, wherein the spray gun is disposed on the front side from the longitudinal center portion or the flow passage longitudinal center portion. 前記ボディに、前記塗料吐出孔及び前記空気流路が開口する開口凹部を有し、
前記ボディに複数形成された前記塗料流路の個々に設けられた前記開閉弁が、前記ボディの前記開口凹部の中心軸線の仮想延長回りの複数箇所に分散配置されている請求項１又は２に記載のスプレーガン。 The body has an opening recess in which the paint discharge hole and the air flow path open,
The said on-off valve provided in each of the said coating material flow path formed in multiple numbers in the said body is disperse | distributed and arrange | positioned in the several places around the virtual extension of the center axis line of the said opening recessed part of the said body. The spray gun described. 前記ボディは、前記塗料流路及び前記空気流路が形成され、前端部に前記塗料吐出孔が開口するノズル部を有するガン本体と、このガン本体の前端部に装着されて前記ノズル部を収納するテーパ筒状の蓋とを有し、前記蓋に開口する開口凹部内に前記塗料吐出孔及び前記空気流路が開口され、前記開閉弁が前記ガン本体に設けられている請求項１〜３のいずれか１項に記載のスプレーガン。   The body is formed with the paint flow path and the air flow path, and has a gun body having a nozzle portion where the paint discharge hole opens at a front end portion, and is mounted on the front end portion of the gun body to store the nozzle portion. 4. A taper-shaped cylindrical lid, wherein the paint discharge hole and the air flow path are opened in an opening recess opened in the lid, and the on-off valve is provided in the gun body. The spray gun of any one of these. 前記ボディに、パターンエアを噴射するためのパターンエア噴射口を有するパターンエア流路が、さらに形成されている請求項１〜４のいずれか１項に記載のスプレーガン。   The spray gun according to any one of claims 1 to 4, wherein a pattern air flow path having a pattern air injection port for injecting pattern air is further formed in the body. 請求項１〜５のいずれか１項に記載のスプレーガンと、該スプレーガンの前記塗料流路に塗料を供給する塗料供給装置と、前記スプレーガンの前記空気流路に圧縮空気を供給する霧化用圧縮空気供給装置と、前記スプレーガンの開閉弁の動作を制御して前記塗料流路の開閉を切り換える開閉制御装置とを有する塗装システム。 The spray gun according to any one of claims 1 to 5, a paint supply device for supplying paint to the paint flow path of the spray gun, and a mist for supplying compressed air to the air flow path of the spray gun A coating system comprising: a compressed air supply device for converting; and an opening / closing control device for switching the opening and closing of the paint flow path by controlling an operation of an opening / closing valve of the spray gun.
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