JPH11197555A - Automatic spray gun - Google Patents
Automatic spray gunInfo
- Publication number
- JPH11197555A JPH11197555A JP637898A JP637898A JPH11197555A JP H11197555 A JPH11197555 A JP H11197555A JP 637898 A JP637898 A JP 637898A JP 637898 A JP637898 A JP 637898A JP H11197555 A JPH11197555 A JP H11197555A
- Authority
- JP
- Japan
- Prior art keywords
- needle valve
- diaphragm
- air
- paint
- atomizing air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、塗料を圧縮空気で
霧化する二流体ノズルを有する自動スプレ−ガンに関す
る。The present invention relates to an automatic spray gun having a two-fluid nozzle for atomizing paint with compressed air.
【０００２】[0002]
【従来技術及びその課題】従来、二流体ノズルを有する
自動スプレ−ガンの開閉は塗料ニ−ドルバルブに直結さ
れたピストン作動機構で行なわれている。該ピストン作
動機構は、通常、ピストン作動空気でピストンを後退さ
せると塗料ニ−ドルバルブが開き、ピストン作動空気を
抜くとピストンが内臓された押しバネの力で前進し塗料
ニ−ドルバルブを閉じるというものである。2. Description of the Related Art Conventionally, an automatic spray gun having a two-fluid nozzle is opened and closed by a piston operating mechanism directly connected to a paint needle valve. The piston operating mechanism is such that the paint needle valve normally opens when the piston is retracted by the piston working air, and when the piston working air is removed, the piston advances by the force of the built-in spring and closes the paint needle valve. It is.
【０００３】具体例を図１に示す。塗料ノズル１及び霧
化空気キャップ２を具備する自動スプレ−ガンの二流体
ノズルにおいて、（１）は塗料吐出ＯＦＦの状態、
（２）は塗料吐出ＯＮの状態である。（１）のように戻
りバネ５によりピストン４の作動空気７が抜かれ、これ
と連動して塗料ニ−ドルバルブ３は閉状態を保つ。
（２）のように作動空気７が入ると、その空気圧によっ
てピストン４が引き込まれ、これと連動して塗料ニ−ド
ルバルブ３が開く。FIG. 1 shows a specific example. In a two-fluid nozzle of an automatic spray gun having a paint nozzle 1 and an atomizing air cap 2, (1) is a state in which paint discharge is OFF,
(2) is a state where the paint discharge is ON. As shown in (1), the working air 7 of the piston 4 is extracted by the return spring 5, and in conjunction with this, the paint needle valve 3 is kept closed.
When the working air 7 enters as shown in (2), the piston 4 is retracted by the air pressure, and in conjunction with this, the paint needle valve 3 is opened.
【０００４】しかしながら該作動機構では、ピストン４
が作動空気７のリ−クを防止するためにＯ−リング６を
介してシリンダ−内壁に密着しており、そのため摺動抵
抗が大きく、塗料ニ−ドルバルブ３のＯＮ／ＯＦＦに必
要なストロ−クを動かすには、通常３ｋｇ／ｃｍ2 以上
のピストン作動空気圧を必要とした。However, in this operating mechanism, the piston 4
Is in close contact with the inner wall of the cylinder via the O-ring 6 to prevent leakage of the working air 7, so that the sliding resistance is large, and the stroke necessary for ON / OFF of the paint needle valve 3 is increased. To move the piston, a piston working air pressure of usually 3 kg / cm 2 or more was required.
【０００５】このためピストン４は、高速では塗料ニ−
ドルバルブ３のＯＮ／ＯＦＦに対応し難く、該ニ−ドル
を高速で戻すには押しバネをより強力にする必要があ
り、それだけ高いピストン作動空気圧を設定しなくては
ならず、結果としてピストン作動空気と霧化空気が同じ
経路から供給される自動スプレ−ガンでは３ｋｇ／ｃｍ
2 以下の低圧霧化塗装を行なうことができなかった。For this reason, at high speed, the piston 4 cannot
It is difficult to respond to ON / OFF of the dollar valve 3, and to return the needle at a high speed, it is necessary to make the pressing spring stronger, so that a higher piston operating air pressure must be set. 3 kg / cm for an automatic spray gun where air and atomizing air are supplied from the same path
No less than 2 low pressure atomized coatings could be performed.
【０００６】ピストン作動空気と霧化空気が別々の経路
から供給される自動スプレ−ガンを使用することもでき
るが、夫々の空気回路をＯＮ／ＯＦＦ制御するソレノイ
ドバルブが別々に必要となり、さらにソレノイドバルブ
の作動電気信号を同一にすると、塗料と空気の粘性の違
いに起因する吐出応答性の差によって霧化空気の方が先
にＯＦＦ状態になるため、スピットと呼ばれる微粒化不
良の塗料粒子が発生しやすくなる。この現象を防止しよ
うとすれば、それぞれのソレノイドバルブに別々の作動
電気信号を与えなくてはならず、制御が複雑になるとい
う問題があった。Although an automatic spray gun in which the piston working air and the atomizing air are supplied from different paths can be used, a solenoid valve for controlling ON / OFF of each air circuit is separately required, and further, a solenoid is required. If the operating electric signal of the valve is made the same, the atomized air is turned off first due to the difference in the ejection response caused by the difference in the viscosity of the paint and the air. More likely to occur. In order to prevent this phenomenon, it is necessary to apply different operating electric signals to each solenoid valve, and there is a problem that control becomes complicated.
【０００７】これに対し、ピストンの作動で霧化空気ニ
−ドルバルブのＯＮ／ＯＦＦと塗料ニ−ドルバルブのＯ
Ｎ／ＯＦＦを連動して行なう自動スプレ−ガンもある
が、ピストンの作動ストロ−クが長く、高速で霧化空気
回路と塗料ニ−ドルバルブをＯＮ／ＯＦＦすることは困
難であった。On the other hand, by operating the piston, the atomizing air needle valve is turned on / off and the paint needle valve is turned on.
Although there is an automatic spray gun that performs N / OFF in conjunction with each other, it has been difficult to turn on / off the atomizing air circuit and the paint needle valve at a high speed due to the long stroke of piston operation.
【０００８】本発明の目的は、二流体ノズルを有する自
動スプレ−ガンにおいて、塗料及び霧化空気の吐出のＯ
Ｎ／ＯＦＦを、低い作動空気圧で且つ高速で作動させる
ことができる自動スプレ−ガンを提供することにある。[0008] It is an object of the present invention to provide an automatic spray gun having a two-fluid nozzle, which is capable of discharging paint and atomizing air.
An object of the present invention is to provide an automatic spray gun capable of operating N / OFF at a low operating air pressure and at a high speed.
【０００９】[0009]
【課題を解決するための手段】即ち本発明は、塗料吐出
のＯＮ／ＯＦＦを行なう塗料ニ−ドルバルブと、霧化空
気吐出のＯＮ／ＯＦＦを行なう霧化空気ニ−ドルバルブ
を内臓し、該塗料ニ−ドルバルブ及び霧化空気ニ−ドル
バルブを駆動する手段がダイアフラムであることを特徴
とする自動スプレ−ガンに関する。That is, the present invention comprises a paint needle valve for turning on / off paint discharge and an atomizing air needle valve for turning on / off spray air. The present invention relates to an automatic spray gun, wherein the means for driving the needle valve and the atomizing air needle valve is a diaphragm.
【００１０】[0010]
【発明の実施の形態】本発明においてニ−ドルバルブの
駆動手段であるダイアフラムは、バルブ駆動部内でその
位置が固定され、空気圧によりその形状を湾曲状に変形
し、この変形に連動してニ−ドルバルブの駆動を行なわ
せしめるものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a diaphragm, which is a driving means of a needle valve, has a fixed position in a valve driving section, deforms its shape into a curved shape by air pressure, and interlocks with the deformation in conjunction with the deformation. This is to drive the dollar valve.
【００１１】本発明では、塗料ニ−ドルバルブ及び霧化
空気ニ−ドルバルブともダイヤフラムで駆動させるた
め、ピストンのような摩擦摺動部の抵抗がなく、高速で
各バルブを作動させることができるだけでなく、作動空
気圧も従来より低圧で使用することが可能である。In the present invention, since both the paint needle valve and the atomizing air needle valve are driven by the diaphragm, there is no resistance of a frictional sliding portion such as a piston, so that each valve can be operated at high speed. Also, the working air pressure can be used at a lower pressure than before.
【００１２】また該ダイアフラムにはニ−ドルバルブを
閉じる戻りバネが直結しており、塗料ニ−ドルバルブを
閉じる戻りバネの押圧力が霧化空気ニ−ドルバルブを閉
じる戻りバネの押圧力より高いことが好適である。これ
により駆動信号が入ってから全閉状態になるまでの塗料
ニ−ドルバルブの応答時間が、霧化空気ニ−ドルバルブ
の応答時間より短くなり、常に塗料吐出がＯＦＦになっ
てから霧化空気の吐出がＯＦＦになるためスピットの発
生は解消される。A return spring for closing the needle valve is directly connected to the diaphragm, and the pressing force of the return spring for closing the paint needle valve is higher than the pressing force of the return spring for closing the atomizing air needle valve. It is suitable. As a result, the response time of the paint needle valve from the input of the drive signal to the fully closed state is shorter than the response time of the atomizing air needle valve. Since the ejection is turned off, the generation of spits is eliminated.
【００１３】さらに、塗料ニ−ドルバルブを駆動するダ
イアフラムの受圧面積を、霧化空気用ニ−ドルバルブを
駆動するダイアフラムの受圧面積より小さいことが好適
である。これにより、駆動信号が入ってから全開状態に
なるまでの塗料ニ−ドルバルブの応答時間が霧化空気ニ
−ドルバルブの応答時間より長くなり、霧化空気のほう
が常に早めに吐出されるため、スプレ−初期段階に於い
てもスピットの発生はほとんどない。It is preferable that the pressure receiving area of the diaphragm driving the paint needle valve is smaller than the pressure receiving area of the diaphragm driving the atomizing air needle valve. As a result, the response time of the paint needle valve from the input of the drive signal to the fully opened state becomes longer than the response time of the atomizing air needle valve, and the atomizing air is always discharged earlier, so that the spraying is performed. -Almost no spits are generated even in the initial stage.
【００１４】また、塗料ニ−ドルバルブを駆動するダイ
アフラムと霧化空気用ニ−ドルバルブを駆動するダイア
フラムを動作させる作動空気は共用できるため、作動空
気のＯＮ／ＯＦＦのためのソレノイドバルブは１つで済
むことになる。Further, since the diaphragm for driving the paint needle valve and the working air for operating the diaphragm for driving the atomizing air needle valve can be shared, only one solenoid valve for ON / OFF of the working air is required. Will be done.
【００１５】[0015]
【実施例】以下、実施例に基づいて本発明を詳細に説明
する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on embodiments.
【００１６】図２は、本発明におけるバルブ作動機構の
概略図である。図２において、（１）は塗料吐出ＯＦＦ
の状態、（２）は塗料吐出ＯＮの状態である。（１）の
ように、戻りバネ１２によりダイアフラム１１が変形し
作動空気１３が抜かれ、これと連動して塗料ニ−ドルバ
ルブ８は閉状態を保つ。（２）のように作動空気１３が
駆動部に入ると、その空気圧によってダイアフラム１１
が引き込まれて変形し、これと連動して塗料ニ−ドルバ
ルブ８が開く。該ダイアフラム１１は湾曲状に変形する
だけであり、摺動による摩擦抵抗等の影響は全く受けな
いため、作動空気１３の圧力を高く設定せずとも、高速
での塗料吐出のＯＮ／ＯＦＦが可能である。FIG. 2 is a schematic view of a valve operating mechanism according to the present invention. In FIG. 2, (1) is a paint discharge OFF.
(2) is a state where the paint discharge is ON. As shown in (1), the diaphragm 11 is deformed by the return spring 12, and the working air 13 is removed, and in conjunction with this, the paint needle valve 8 is kept closed. When the working air 13 enters the driving unit as in (2), the air pressure causes the diaphragm 11 to move.
Is drawn and deformed, and in conjunction with this, the paint needle valve 8 opens. Since the diaphragm 11 only deforms in a curved shape and is not affected by frictional resistance due to sliding at all, it is possible to turn on / off the paint discharge at a high speed without setting the pressure of the working air 13 high. It is.
【００１７】図３は、本発明の自動スプレ−ガンの一実
施例を示す概略図である。塗料２３が吐出される塗料ノ
ズル１５及び霧化空気２４が噴出される霧化空気キャッ
プ１４を具備する二流体ノズルにおいて、塗料ニ−ドル
バルブ１６により塗料２３の吐出のＯＮ／ＯＦＦを、霧
化空気ニ−ドルバルブ１９により霧化空気２４の噴出の
ＯＮ／ＯＦＦを行なわせるものである。FIG. 3 is a schematic view showing an embodiment of the automatic spray gun of the present invention. In a two-fluid nozzle having a paint nozzle 15 from which the paint 23 is discharged and an atomizing air cap 14 from which the atomizing air 24 is ejected, ON / OFF of the discharge of the paint 23 by the paint needle valve 16 is determined. The needle valve 19 turns on / off the ejection of the atomizing air 24.
【００１８】塗料ニ−ドルバルブ１６は、これに直結す
るダイアフラム１７及び戻りバネ１８を具備するバルブ
駆動部内に作動空気２２が導入されると、ダイアフラム
１７が空気圧により変形し、これと連動して引込み開状
態となって塗料吐出ＯＮとなる。同様に霧化空気ニ−ド
ルバルブ１９も、これに直結するダイアフラム２１及び
戻りバネ２０を具備するバルブ駆動部内に作動空気２２
が導入されダイアフラム２１が空気圧により変形し、こ
れと連動して引込み開状態となって霧化空気吐出ＯＮと
なる。これにより塗料ノズル１５から塗料２３が吐出さ
れ、同時に霧化空気キャップ１４から霧化空気２４が噴
出されて、塗料霧化が行われるものである。When the working air 22 is introduced into the valve driving unit having the diaphragm 17 and the return spring 18 directly connected to the paint needle valve 16, the diaphragm 17 is deformed by air pressure and is pulled in conjunction with the air. It becomes an open state and the paint discharge is turned ON. Similarly, the atomizing air needle valve 19 also includes a working air 22 in a valve driving unit having a diaphragm 21 and a return spring 20 directly connected thereto.
Is introduced, the diaphragm 21 is deformed by air pressure, and in conjunction with this, the retracted state is opened and the atomized air discharge is turned on. As a result, the paint 23 is discharged from the paint nozzle 15 and, at the same time, the atomizing air 24 is ejected from the atomizing air cap 14 to perform the atomization of the paint.
【００１９】図４は、本発明の自動スプレ−ガンを用い
た吐出応答性を示す説明図である。上記自動スプレ−ガ
ンにおける設計条件を、塗料ニ−ドルバルブ１６と連動
するダイアフラム１７の受圧面積を５ｃｍ2 、霧化空気
ニ−ドルバルブ１９と連動するダイアフラム２１の受圧
面積を１０ｃｍ2 とし、戻りバネ１８の強さを最大１０
ｋｇ、戻りバネ２０の強さを最大５ｋｇとした。この条
件下で、作動空気２２の空気圧力を２ｋｇ／ｃｍ2 に設
定してスプレ−ＯＮ／ＯＦＦ動作を行なった。図４の
（１）は、その際のパルス駆動信号を、（２）は塗料吐
出の応答性を、（３）は霧化空気吐出の応答性を表すも
のである。FIG. 4 is an explanatory diagram showing the ejection response using the automatic spray gun of the present invention. The design conditions of the above automatic spray gun are as follows: the pressure receiving area of the diaphragm 17 interlocking with the paint needle valve 16 is 5 cm 2 , the pressure receiving area of the diaphragm 21 interlocking with the atomizing air needle valve 19 is 10 cm 2 , and the return spring 18 Up to 10 strength
kg, and the strength of the return spring 20 was set to a maximum of 5 kg. Under these conditions, the spray-ON / OFF operation was performed by setting the air pressure of the working air 22 to 2 kg / cm 2 . FIG. 4A shows the pulse driving signal at that time, FIG. 4B shows the response of paint discharge, and FIG. 4B shows the response of atomized air discharge.
【００２０】上記条件によると、スプレ−開始時には、
霧化空気吐出の方が早く立ち上がり、塗料吐出は遅れて
立ち上がり、スプレ−終了時には塗料吐出の方が早く止
まり霧化空気吐出が遅れて止まるため、微粒化不良によ
るスピットは全く発生しなかった。According to the above conditions, at the start of spraying,
Since the spraying of the atomizing air started earlier, the spraying of the paint started up later, and the spraying ended at the end of the spraying, the jetting of the spraying air stopped later, so that no spits due to poor atomization occurred.
【００２１】また本発明の自動スプレ−ガンのスプレ−
ＯＮ／ＯＦＦの最小応答時間は約２０ｍ秒で従来方式の
自動スプレ−ガンの約１／５に短縮することができた。Also, the spray of the automatic spray gun of the present invention.
The minimum ON / OFF response time was about 20 ms, which was about 1/5 that of the conventional automatic spray gun.
【００２２】[0022]
【発明の効果】本発明の自動スプレ−ガンでは、ニ−ド
ルバルブの駆動をダイアフラムにすることにより、塗料
及び霧化空気の吐出のＯＮ／ＯＦＦを、低い作動空気圧
で且つ高速で作動させることができ、さらにダイアフラ
ムの受圧面積と戻りバネの強さを調整することで吐出応
答性を自由に制御することが可能である。According to the automatic spray gun of the present invention, by turning the needle valve on the diaphragm, the discharge of the paint and the atomizing air can be turned on / off at a low operating air pressure and at a high speed. The discharge response can be freely controlled by adjusting the pressure receiving area of the diaphragm and the strength of the return spring.
【図１】従来のバルブ作動機構の概略図である。FIG. 1 is a schematic view of a conventional valve operating mechanism.
【図２】本発明におけるバルブ作動機構の概略図であ
る。FIG. 2 is a schematic view of a valve operating mechanism according to the present invention.
【図３】本発明の自動スプレ−ガンの一実施例を示す概
略図である。FIG. 3 is a schematic view showing one embodiment of the automatic spray gun of the present invention.
【図４】本発明の自動スプレ−ガンを用いた吐出応答性
を示す説明図である。FIG. 4 is an explanatory diagram showing ejection responsiveness using the automatic spray gun of the present invention.
１、９、１５ ・・・塗料ノズル ２、１０、１４ ・・・霧化空気キャップ ３、８、１６ ・・・塗料ニ−ドルバルブ １９ ・・・霧化空気ニ−ドルバルブ ４ ・・・ピストン ５、１２、１８、２０・・・戻りバネ ６ ・・・Ｏ−リング ７、１３、２２ ・・・作動空気 １１、１７、２１ ・・・ダイアフラム ２３ ・・・塗料 ２４ ・・・霧化空気 1, 9, 15 ... paint nozzle 2, 10, 14 ... atomizing air cap 3, 8, 16 ... paint needle valve 19 ... atomizing air needle valve 4 ... piston 5 , 12, 18, 20 ... return spring 6 ... O-ring 7, 13, 22 ... working air 11, 17, 21 ... diaphragm 23 ... paint 24 ... atomizing air
Claims (3)
−ドルバルブと、霧化空気吐出のＯＮ／ＯＦＦを行なう
霧化空気ニ−ドルバルブを内臓し、該塗料ニ−ドルバル
ブ及び霧化空気ニ−ドルバルブを駆動する手段がダイア
フラムであることを特徴とする自動スプレ−ガン。1. A paint needle valve for turning on / off paint discharge, and an atomizing air needle valve for turning on / off atomizing air discharge, the paint needle valve and atomizing air needle are provided. An automatic spray gun wherein the means for driving the dollar valve is a diaphragm.
には該バルブを閉じる戻りバネが直結しており、塗料ニ
−ドルバルブを閉じる戻りバネの押圧力が、霧化空気ニ
−ドルバルブを閉じる戻りバネの押圧力より高い請求項
１記載の自動スプレ−ガン。2. A return spring for closing the valve is directly connected to the diaphragm driving the needle valve, and the pressing force of the return spring for closing the paint needle valve is applied to the return spring for closing the atomizing air needle valve. 2. The automatic spray gun according to claim 1, wherein the pressing force is higher than the pressing force.
ラムの受圧面積が、霧化空気ニ−ドルバルブを駆動する
ダイアフラムの受圧面積より小さい請求項１又は２記載
の自動スプレ−ガン。3. The automatic spray gun according to claim 1, wherein the pressure receiving area of the diaphragm driving the paint needle valve is smaller than the pressure receiving area of the diaphragm driving the atomizing air needle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP637898A JPH11197555A (en) | 1998-01-16 | 1998-01-16 | Automatic spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP637898A JPH11197555A (en) | 1998-01-16 | 1998-01-16 | Automatic spray gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11197555A true JPH11197555A (en) | 1999-07-27 |
Family
ID=11636729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP637898A Pending JPH11197555A (en) | 1998-01-16 | 1998-01-16 | Automatic spray gun |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11197555A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006239502A (en) * | 2005-03-01 | 2006-09-14 | Toyota Motor Corp | Solid liquid suspension coating apparatus |
| JP2016077405A (en) * | 2014-10-14 | 2016-05-16 | 株式会社 資生堂 | Spray device |
| CN107690357A (en) * | 2015-05-22 | 2018-02-13 | 萨塔有限两合公司 | The device being coated for the surface for surface, particularly colouring or painting |
| JP2019141837A (en) * | 2018-02-23 | 2019-08-29 | ヘンネッケ ゲー エム ベー ハーＨｅｎｎｅｃｋｅ ＧｍｂＨ | Component mixture spray body |
-
1998
- 1998-01-16 JP JP637898A patent/JPH11197555A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006239502A (en) * | 2005-03-01 | 2006-09-14 | Toyota Motor Corp | Solid liquid suspension coating apparatus |
| JP4725715B2 (en) * | 2005-03-01 | 2011-07-13 | トヨタ自動車株式会社 | Solid-liquid suspension coating apparatus and solid-liquid suspension coating method |
| JP2016077405A (en) * | 2014-10-14 | 2016-05-16 | 株式会社 資生堂 | Spray device |
| CN107690357A (en) * | 2015-05-22 | 2018-02-13 | 萨塔有限两合公司 | The device being coated for the surface for surface, particularly colouring or painting |
| JP2019141837A (en) * | 2018-02-23 | 2019-08-29 | ヘンネッケ ゲー エム ベー ハーＨｅｎｎｅｃｋｅ ＧｍｂＨ | Component mixture spray body |
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