JP2000334343A - Connection metal fitting for spray gun and production thereof - Google Patents
Connection metal fitting for spray gun and production thereofInfo
- Publication number
- JP2000334343A JP2000334343A JP11154764A JP15476499A JP2000334343A JP 2000334343 A JP2000334343 A JP 2000334343A JP 11154764 A JP11154764 A JP 11154764A JP 15476499 A JP15476499 A JP 15476499A JP 2000334343 A JP2000334343 A JP 2000334343A
- Authority
- JP
- Japan
- Prior art keywords
- spray gun
- stainless steel
- water
- paint
- main body
- 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
- 239000007921 spray Substances 0.000 title claims description 63
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000002184 metal Substances 0.000 title 1
- 239000003973 paint Substances 0.000 claims abstract description 87
- 238000002161 passivation Methods 0.000 claims abstract description 46
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 39
- 239000010935 stainless steel Substances 0.000 claims abstract description 39
- 230000002093 peripheral effect Effects 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- 238000000034 method Methods 0.000 claims description 12
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 7
- 238000005219 brazing Methods 0.000 description 6
- 238000005054 agglomeration Methods 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 206010070834 Sensitisation Diseases 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000008313 sensitization Effects 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229920006169 Perfluoroelastomer Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229920001973 fluoroelastomer Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- -1 chromium carbides Chemical class 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
Landscapes
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Nozzles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水性塗料の塗装に
用いるスプレーガンに好適なスプレーガン用接続金具お
よびその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fitting for a spray gun suitable for a spray gun used for applying a water-based paint, and a method for producing the same.
【０００２】[0002]
【従来の技術】従来、循環供給される水性塗料をスプレ
ーガンに圧力調整可能にして供給するスプレーガン用接
続金具が知られている。この水性塗料は、公害の発生を
防止できるなどの理由により自動車の塗料として近年多
用されており、複数のスプレーガンを１つの塗料供給源
に接続して使用されている。2. Description of the Related Art Conventionally, there is known a connection fitting for a spray gun which supplies a circulated and supplied water-based paint to a spray gun while adjusting the pressure thereof. This water-based paint has been widely used in recent years as a paint for automobiles because it can prevent the occurrence of pollution, and a plurality of spray guns are connected to one paint supply source.
【０００３】図２は、従来からあるスプレーガン用接続
金具を示すものであり、このスプレーガン用接続金具１
は、ほぼ筒状の本体２を有している。この本体２の外周
面の長手方向のほぼ中央部には、本体２の軸心を中心と
して対称に傾斜配置された筒状の１対の枝部３，３が突
設されており、各枝部３，３の先端部分には、ほぼくの
字形状に形成されたパイプ部材４，４の一端が装着され
ている。そして、これらのパイプ部材４，４の他端に
は、配管継手５がそれぞれ螺着されており、塗装を実行
する際には、例えば図２右方に示す一方のパイプ部材４
ａの他端には、図示しない塗料供給源からの水性塗料の
塗料供給配管７の一端が接続され、図２左方に示す他方
のパイプ部材４ｂの他端には、図示しない塗料供給源へ
の塗料回収配管８の一端が接続されるようになってい
る。FIG. 2 shows a conventional connection fitting for a spray gun.
Has a substantially cylindrical main body 2. At a substantially central portion in the longitudinal direction of the outer peripheral surface of the main body 2, a pair of cylindrical branch portions 3 and 3 symmetrically arranged with respect to the axis of the main body 2 as a center is projected and provided. At one end of each of the parts 3, 3, one end of a pipe member 4, 4 formed in a substantially U-shape is mounted. A pipe joint 5 is screwed to the other end of each of the pipe members 4, 4. When the coating is performed, for example, one pipe member 4 shown in the right side of FIG.
The other end of a is connected to one end of a paint supply pipe 7 for aqueous paint from a paint supply source (not shown), and the other end of the other pipe member 4b shown on the left side of FIG. One end of the paint collection pipe 8 is connected.
【０００４】前記本体２の図２上方に示す一端には、ス
プレーガンＧの塗料流入口ＧＡとの接続に用いる接続継
手１０が螺着されており、この接続継手１０の図２下方
に示す基端部側の端面には弁座１１が設けられている。
また、本体２の内部の図２下方に示す他端には、ニード
ル１３がその先端部に設けた弁部１３ａを弁座１１と対
向するようにして螺着されている。このニードル１３の
軸方向のほぼ中央部分の外周面には、ふっ素樹脂、ふっ
素ゴム、パーフロエラストマーなどの化学的に安定した
素材により形成されたＯリングなどの密封装置１４が配
設されており、本体２の内部に循環供給される図示しな
い水性塗料が本体２の図２下方に示す他端から漏洩する
のを防止できるようになっている。さらに、ニードル１
３の図２下方に示す端部は、本体２の外部に露出するよ
うに配設されており、この端部の外周面には、ニードル
１３の回動を規制するロックナット１５が螺合されてい
る。また、ニードル１３の図２下方に示す端部の端面に
は、取付軸１３ｂがニードル１３の軸心と同軸状にして
一体に突設されており、この取付軸１３の先端部には、
ニードル１３を回動するためのノブ１７が止めねじ１８
をもって固定されている。A connection joint 10 used for connection with the paint inlet GA of the spray gun G is screwed into one end of the main body 2 shown in the upper part of FIG. 2, and a base shown in the lower part of FIG. A valve seat 11 is provided on the end face on the end side.
Further, a needle 13 is screwed to the other end of the inside of the main body 2 shown in the lower part of FIG. 2 so that a valve portion 13 a provided at a tip end thereof faces the valve seat 11. A sealing device 14 such as an O-ring formed of a chemically stable material such as fluororesin, fluororubber, or perfluoroelastomer is provided on an outer peripheral surface of a substantially central portion of the needle 13 in the axial direction. The aqueous paint (not shown) circulated and supplied into the main body 2 can be prevented from leaking from the other end of the main body 2 shown in the lower part of FIG. In addition, needle 1
2 is disposed so as to be exposed to the outside of the main body 2, and a lock nut 15 for restricting the rotation of the needle 13 is screwed onto an outer peripheral surface of the end. ing. On the end face of the end portion of the needle 13 shown in the lower part of FIG. 2, a mounting shaft 13 b is integrally formed so as to protrude coaxially with the axis of the needle 13.
The knob 17 for rotating the needle 13 is a set screw 18
It is fixed with.
【０００５】すなわち、ロックナット１５を緩めた状態
でノブ１７を人手により回動させることで、ニードル１
３の図２上方に示す先端部に設けた弁部１３ａが接続継
手１０に設けた弁座１１に対して接離するように進退可
能に構成されている。That is, by turning the knob 17 manually while the lock nut 15 is loosened, the needle 1
3 is configured to be able to advance and retreat so that a valve portion 13a provided at the distal end portion shown in the upper part of FIG.
【０００６】前記スプレーガン用接続金具１の各部品の
うちの少なくとも水性塗料が接触する部品、例えば、本
体２、各パイプ部材４，４、配管継手５、接続継手１０
およびニードル１３は、水性塗料に対する防食性を保持
するために、ともにオーステナイト系ステンレス、例え
ばＳＵＳ３０４により個別に形成されている。また、本
体２の枝部３，３と各パイプ部材４，４とは、銀ろう付
によって接合することで一体化されている。At least one of the parts of the connection fitting 1 for the spray gun that comes into contact with the water-based paint, for example, the main body 2, the pipe members 4 and 4, the pipe joint 5, and the connection joint 10.
The needle 13 and the needle 13 are individually formed of austenitic stainless steel, for example, SUS304 in order to maintain corrosion resistance to the water-based paint. Further, the branch portions 3, 3 of the main body 2 and the respective pipe members 4, 4 are integrated by joining with silver brazing.
【０００７】このような構成のスプレーガン用接続金具
１によれば、ノブ１７を人手により回動させることで本
体２の内部に循環供給される水性塗料をスプレーガンＧ
に供給あるいは遮断することができるとともに、本体２
の内部に循環供給する水性塗料をスプレーガンＧに供給
する場合には、ノブ１７を人手により回動させることで
弁座１１に対するニードル１３の弁部１３ａの間隔を調
整することで水性塗料を圧力調整可能にしてスプレーガ
ンＧに供給するようになっている。According to the connection fitting 1 for a spray gun having such a configuration, the spray paint G is supplied to the spray gun G by rotating the knob 17 manually.
To the main body 2
When supplying the water-based paint to be circulated and supplied into the spray gun G to the spray gun G, the distance between the valve portion 13a of the needle 13 and the valve seat 11 is adjusted by manually turning the knob 17 so that the water-based paint is pressed. Adjustable and supplied to the spray gun G.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、前述し
た従来のスプレーガン用接続金具１においては、本体２
の内部に循環供給される塗料である水性塗料に凝塊が生
じて、スプレーガンＧのノズルＮ（図２）が詰まった
り、塗装面に部分的な凸部が生じて塗装品質が低下する
などの問題点があった。However, in the above-mentioned conventional fitting 1 for a spray gun, the main body 2 is not provided.
Agglomeration occurs in the water-based paint, which is the paint circulated and supplied inside the nozzle, and the nozzle N of the spray gun G (FIG. 2) is clogged, and the coating surface is partially protruded, thereby deteriorating the coating quality. There was a problem.
【０００９】本発明はこれらの点に鑑みてなされたもの
であり、水性塗料に凝塊が生じるのを確実に防止するこ
とのできるスプレーガン用接続金具を提供することを目
的とする。The present invention has been made in view of the above points, and an object of the present invention is to provide a connection fitting for a spray gun which can reliably prevent agglomeration of an aqueous paint.
【００１０】[0010]
【課題を解決するための手段】前述した目的を達成する
ため本発明者は、水性塗料に凝塊が生じるのを確実に防
止すべく鋭意研究を行った結果、水性塗料に凝塊が生じ
るのは、オーステナイト系ステンレスにより形成されて
いる本体に個別に形成されたパイプ部材をろう付するこ
とにより、加熱部に位置するステンレスが鋭敏化してし
まうこと（オーステナイト系ステンレスを炭化物の固溶
限界温度以下の温度に再加熱すると過飽和に固溶してい
た炭素がクロム炭化物として結晶粒界に析出し成長する
成長過程で、マトリックスからのクロムの拡散に遅れが
生じてクロムの欠乏域が結晶粒界近傍に形成されるこ
と）、および、不動態化処理を施すことができないこと
（不動態化処理を施す際にろう付した銀ろうが溶ける）
に起因しており、ろう付をせずに一体形成した本体を用
いることでステンレスの鋭敏化を防止するとともに、少
なくとも水性塗料と接する表面に不動態化膜を形成する
ことができ、その結果、水性塗料に凝塊が生じるのを確
実に防止することを見出し、本発明を完成したものであ
る。In order to achieve the above-mentioned object, the present inventor has conducted intensive studies to ensure that no agglomeration occurs in the water-based paint. Is that the brazing of individually formed pipe members to the main body made of austenitic stainless steel causes the stainless steel located in the heating section to become sensitized (the austenitic stainless steel becomes less than the solid solution limit temperature of carbide). When re-heated to the temperature above, the carbon dissolved in supersaturation precipitates and grows at the grain boundaries as chromium carbides.In the growth process, the diffusion of chromium from the matrix is delayed, and the chromium-depleted region is near the grain boundaries. To be able to be subjected to passivation treatment (the silver solder brazed at the time of passivation treatment melts)
It is possible to prevent the sensitization of stainless steel by using the body integrally formed without brazing, and to form a passivation film at least on the surface in contact with the water-based paint, The present inventors have found that coagulation is reliably prevented from occurring in the water-based paint, and have completed the present invention.
【００１１】すなわち、特許請求の範囲の請求項１に記
載の本発明のスプレーガン用接続金具の特徴は、外周面
に１対の筒状枝部を延出形成したほぼ筒状の少なくとも
水性塗料が接する表面に不動態化膜が形成されたステン
レス製の本体と、本体をスプレーガンの塗料流入口へ接
続するため本体の一端に螺着され少なくとも水性塗料が
接する表面に不動態化膜が形成された弁座を具備するス
テンレス製の接続継手と、本体の他端に螺着され前記接
続継手の弁座に対して進退可能とされ少なくとも水性塗
料が接する表面に不動態化膜が形成されたステンレス製
のニードルと、１対の筒状枝部の先端部分に螺着され少
なくとも水性塗料が接する表面に不動態化膜が形成され
たステンレス製の配管継手とを有する点にある。[0011] That is, the feature of the connection fitting for a spray gun according to the present invention described in claim 1 is that at least a substantially cylindrical water-based paint having a pair of cylindrical branches extending to the outer peripheral surface. And a stainless steel body with a passivation film formed on the surface in contact with it, and a passivation film formed on at least the surface where the water-based paint comes in contact with one end of the body to connect the body to the paint inlet of the spray gun A stainless steel connection joint having a valve seat, and a passivation film formed on at least the surface in contact with the water-based paint by being screwed to the other end of the main body and capable of moving back and forth with respect to the valve seat of the connection joint. It has a stainless steel needle and a stainless steel pipe joint which is screwed to the tip of a pair of cylindrical branches and has a passivation film formed on at least the surface in contact with the water-based paint.
【００１２】そして、このような構成を採用したことに
より、本体は、ろう付をせずに形成することができるの
で、ステンレスの鋭敏化を確実に防止することができる
とともに、少なくとも水性塗料が接触する部位には不動
態化膜が形成されているので、水性塗料に凝塊が生じる
のを確実に防止することができる。[0012] By adopting such a configuration, the main body can be formed without brazing, so that sensitization of stainless steel can be surely prevented, and at least the water-based paint comes into contact with the stainless steel. Since the passivation film is formed at the portion where the water-based paint is formed, it is possible to reliably prevent the water-based paint from forming a coagulum.
【００１３】また、特許請求の範囲の請求項２に記載の
本発明のスプレーガン用接続金具の製造方法の特徴は、
外周面に１対の筒状枝部を延出形成したほぼ筒状のステ
ンレス製の本体を形成し、その後、本体の少なくとも水
性塗料が接する表面に不動態化処理を施した後、本体の
一端に本体をスプレーガンの塗料流入口へ接続するため
少なくとも水性塗料が接する表面に不動態化処理を施し
た弁座を具備するステンレス製の接続継手を螺着し、本
体の他端に接続継手の弁座に対して進退可能な少なくと
も水性塗料が接する表面に不動態化処理を施したステン
レス製のニードルを螺着し、１対の筒状枝部の先端部分
に少なくとも水性塗料が接する表面に不動態化処理を施
したステンレス製の配管継手をそれぞれ螺着する点にあ
る。Further, the feature of the method for manufacturing a fitting for a spray gun according to the present invention described in claim 2 is that:
A substantially cylindrical stainless steel main body having a pair of cylindrical branch portions extending from the outer peripheral surface is formed, and then a passivation treatment is performed on at least a surface of the main body in contact with the water-based paint. In order to connect the main body to the paint inlet of the spray gun, a stainless steel connection joint having a valve seat subjected to a passivation treatment is screwed at least on the surface in contact with the water-based paint, and the other end of the connection joint is screwed to the other end of the main body. A passivated stainless steel needle is screwed onto at least the surface of the valve seat that is in contact with the water-based paint that can advance and retreat, and at least the surface where the water-based paint is in contact with the tip portions of the pair of tubular branches. The point is that each of the stainless steel pipe joints subjected to the passivation treatment is screwed.
【００１４】そして、このような構成を採用したことに
より、請求項１に記載の本発明のスプレーガン用接続金
具を容易かつ確実に製造することができる。By adopting such a configuration, the connection fitting for a spray gun according to the first aspect of the present invention can be easily and reliably manufactured.
【００１５】[0015]
【発明の実施の形態】以下、本発明を図面に示す実施形
態により説明する。なお、前述した従来のものと同一乃
至相当する構成については図面中に同一の符号を付しそ
の詳しい説明は省略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. The same or corresponding components as those of the above-described conventional device are denoted by the same reference numerals in the drawings, and detailed description thereof will be omitted.
【００１６】図１は本発明に係るスプレーガン用接続金
具の製造方法にしたがって形成される本発明に係るスプ
レーガン用接続金具の実施形態の要部を示す一部切断正
面図である。FIG. 1 is a partially cutaway front view showing an essential part of an embodiment of a spray gun fitting according to the present invention formed according to a method for manufacturing a spray gun fitting according to the present invention.
【００１７】図１に示すように、本実施形態のスプレー
ガン用接続金具２１は、ほぼ筒状のステンレス製の本体
２２を有している。この本体２２の外周面の長手方向の
ほぼ中央部には、本体２２の軸心を中心として対称に傾
斜配置された１対の筒状枝部２３，２３が延出形成され
ており、本体２２の少なくとも水性塗料が接する表面
（部位）には、不動態化処理による図示しない不動態化
膜が形成されている。そして、筒状枝部２３，２３の先
端部分には、ステンレス製の配管継手２５がそれぞれ螺
着されており、これらの筒状枝部２３，２３の先端部分
には、スプレーガンＧによる水性塗料の塗装を実行する
際に、例えば図１右方に示す一方のには、図示しない塗
料供給源からの水性塗料の塗料供給配管７の一端が接続
され、図２左方に示す他方には、図示しない塗料供給源
への塗料回収配管８の一端が接続されるようになってい
る。そして、配管継手２５の外周面の長手方向のほぼ中
央部分には、配管継手２５を筒状枝部２３に螺着する際
に用いるナット部２６が径方向に突出するようにして一
体形成されており、ナット部２６の図１上方に示す端面
は、配管継手２５を筒状枝部２３に螺着する際に、筒状
枝部２３に対する配管継手２５の螺合長さを規制するス
トッパとして機能するようになっている。また、配管継
手２５の少なくとも水性塗料が接する表面（部位）に
は、不動態化処理による図示しない不動態化膜が形成さ
れている。As shown in FIG. 1, the connection fitting 21 for a spray gun according to the present embodiment has a substantially cylindrical stainless steel main body 22. A pair of cylindrical branches 23, 23 symmetrically arranged about the axis of the main body 22 and extending therefrom are formed at substantially the center of the outer peripheral surface of the main body 22 in the longitudinal direction. A passivation film (not shown) is formed by a passivation process on at least the surface (site) in contact with the aqueous paint. A pipe joint 25 made of stainless steel is screwed to each of the distal ends of the tubular branches 23, 23, and a water-based paint by a spray gun G is attached to the distal ends of the tubular branches 23, 23. When performing the coating of, for example, one end shown in the right of FIG. 1 is connected to one end of a paint supply pipe 7 of a water-based paint from a paint supply source (not shown), and the other shown in the left of FIG. One end of a paint collection pipe 8 to a paint supply source (not shown) is connected. A nut 26 used when the pipe joint 25 is screwed to the tubular branch 23 is formed integrally with a substantially central portion of the outer peripheral surface of the outer peripheral surface of the pipe joint 25 in the longitudinal direction so as to protrude in the radial direction. The upper end surface of the nut portion 26 shown in FIG. 1 functions as a stopper that regulates a screwing length of the pipe joint 25 to the tubular branch portion 23 when the pipe joint 25 is screwed to the tubular branch portion 23. It is supposed to. In addition, a passivation film (not shown) is formed by a passivation process on at least the surface (site) of the pipe joint 25 that is in contact with the aqueous paint.
【００１８】前記本体２２の図１上方に示す一端には、
スプレーガンＧの塗料流入口ＧＡとの接続に用いるステ
ンレス製の接続継手３０が螺着されている。この接続継
手３０は、本体２２の図１上方に示す一端に螺着される
ほぼ筒状の接続基体３０ａと、この接続基体３０ａの図
１上方に示す長手方向の本体２２に螺着される部位の反
対側に装着されたほぼ筒状のジョイント３０ｂとを有し
ており、接続基体３０ａの図１下方に示す基端部側の端
面には弁座３１が設けられている。そして、接続継手３
０の少なくとも水性塗料が接する表面（部位）には、不
動態化処理による図示しない不動態化膜が形成されてい
る。At one end of the main body 22 shown in the upper part of FIG.
A connection joint 30 made of stainless steel and used for connection with the paint inlet GA of the spray gun G is screwed. The connection joint 30 has a substantially cylindrical connection base 30a screwed to one end of the main body 22 shown in FIG. 1 above, and a portion of this connection base 30a screwed to the longitudinal main body 22 shown in FIG. And a substantially cylindrical joint 30b mounted on the opposite side of the connecting base 30a. A valve seat 31 is provided on an end face of the connecting base 30a on the base end side shown in the lower part of FIG. And connection joint 3
A passivation film (not shown) is formed by passivation at least on the surface (site) where the water-based paint is in contact.
【００１９】前記本体２２の内部の図１下方に示す他端
には、ステンレス製のニードル３３がその先端部に設け
た弁部３３ａを前記弁座３１と対向するようにして螺着
されている。このニードル３３の軸方向のほぼ中央部分
の外周面には、ふっ素樹脂、ふっ素ゴム、パーフロエラ
ストマーなどの化学的に安定した素材により形成された
Ｏリングなどの密封装置３４が配設されており、本体２
２の内部に循環供給される図示しない水性塗料が本体２
２の図１下方に示す他端から漏洩するのを防止できるよ
うになっている。さらに、ニードル３３の図１下方に示
す端部は、本体２２の外部に露出するように配設されて
おり、この端部の外周面には、ニードル３３の回動を規
制するロックナット３５が螺合されている。また、ニー
ドル３３の図１下方に示す端部の端面には、取付軸３３
ｂがニードル３３の軸心と同軸状にして一体に突設され
ており、この取付軸３３の先端部には、従来と同様に、
ニードル３３を回動するための図示しないノブが止めね
じ（図２参照）をもって固定されている。すなわち、従
来と同様に、ロックナット３５を緩めた状態で図示しな
いノブを人手により回動させることで、ニードル３３の
図１上方に示す先端部に設けた弁部３３ａが接続継手３
０に設けた弁座３１に対して接離するように進退可能に
構成されている。また、ニードル３３の少なくとも水性
塗料が接する表面（部位）には、不動態化処理による図
示しない不動態化膜が形成されている。A needle 33 made of stainless steel is screwed to the other end of the main body 22 shown in the lower part of FIG. 1 so that a valve portion 33 a provided at the tip thereof is opposed to the valve seat 31. . A sealing device 34 such as an O-ring formed of a chemically stable material such as fluororesin, fluororubber, or perfluoroelastomer is provided on an outer peripheral surface of a substantially central portion of the needle 33 in the axial direction. Body 2
A water-based paint (not shown) circulated and supplied into the inside of the main body 2
2 can be prevented from leaking from the other end shown in the lower part of FIG. The lower end of the needle 33 shown in FIG. 1 is disposed so as to be exposed to the outside of the main body 22. A lock nut 35 for restricting the rotation of the needle 33 is provided on the outer peripheral surface of this end. It is screwed. Further, an attachment shaft 33 is provided on the end face of the end of the needle 33 shown in FIG.
b is coaxially formed with the axis of the needle 33 and is integrally protruded therefrom.
A knob (not shown) for rotating the needle 33 is fixed with a set screw (see FIG. 2). That is, as in the conventional case, the knob 33 (not shown) is manually rotated while the lock nut 35 is loosened, so that the valve portion 33a provided at the distal end of the needle 33 shown in the upper part of FIG.
It is configured to be able to advance and retreat so as to come into contact with and separate from the valve seat 31 provided at 0. In addition, a passivation film (not shown) is formed by a passivation process on at least the surface (site) of the needle 33 in contact with the aqueous paint.
【００２０】つぎに、本実施形態のスプレーガン用接続
金具２１の製造方法について説明する。Next, a method of manufacturing the connection fitting 21 for the spray gun of the present embodiment will be described.
【００２１】本実施形態のスプレーガン用接続金具２１
の製造方法においては、ステンレス鋳物、例えば、オー
ステナイト系ステンレスのステンレス鋳物により形成し
たワークに対して機械加工を施すことにより、外周面に
１対の筒状枝部２３，２３を延出形成したほぼ筒状の本
体２２を一体形成し、この本体２２に不動態化処理を施
し表面に不動態化膜を形成する。この時、本体２２をス
テンレス鋳物により形成したワークに対して機械加工を
施すことにより、本体２２を形成する際のワークの加工
代を少なくして本体２２の加工時間を短くすることがで
きるので、低コスト化を容易に実現することができる。The connection fitting 21 for the spray gun according to the present embodiment.
In the manufacturing method described above, a pair of cylindrical branch portions 23 are formed on the outer peripheral surface by machining a work formed of a stainless steel casting, for example, a stainless steel casting of austenitic stainless steel. A cylindrical main body 22 is integrally formed, and the main body 22 is subjected to a passivation process to form a passivation film on the surface. At this time, by performing machining on the work formed of the stainless steel casting for the main body 22, it is possible to reduce the machining allowance of the work when forming the main body 22 and shorten the processing time of the main body 22. Cost reduction can be easily realized.
【００２２】また、前記本体２２および密封装置３４を
除くスプレーガン用接続金具２１を構成する部品のうち
の少なくとも水性塗料と接触する部品、例えば、配管継
手２５、接続継手３０およびニードル３３についても、
オーステナイト系ステンレスを加工し、その後不動態化
処理を施し表面に不動態化膜を形成する。In addition, at least parts that make contact with the water-based paint, such as the pipe joint 25, the connection joint 30, and the needle 33, of the parts constituting the connection fitting 21 for the spray gun except the main body 22 and the sealing device 34,
The austenitic stainless steel is processed and then subjected to a passivation treatment to form a passivation film on the surface.
【００２３】なお、本体２２、配管継手２５、接続継手
３０およびニードル３３における不動態化処理による不
動態化膜の形成部位は、少なくとも水性塗料が接する表
面（部位）に形成すればよいが、一般的な不動態化処理
は、処理を要する部材を不動態化剤の水溶液に浸漬する
ことにより行うので、部分的な不動態化膜の形成は手間
がかかるので、各部品の全ての表面に形成するのが一般
的である。The passivation film formed by the passivation treatment in the main body 22, the pipe joint 25, the connection joint 30, and the needle 33 may be formed at least on the surface (site) in contact with the water-based paint. Since the passivation process is performed by immersing the components requiring treatment in an aqueous solution of a passivating agent, the formation of a partial passivation film is time-consuming, so that the passivation film is formed on all surfaces of each part. It is common to do.
【００２４】また、本実施形態のスプレーガン用接続金
具２１においては、密封装置３４を除く全ての部品をオ
ーステナイト系ステンレスを加工し、その後不動態化処
理を施し表面に不動態化膜を形成することにより形成し
てもよい。In the connection fitting 21 for the spray gun of the present embodiment, all parts except the sealing device 34 are processed from austenitic stainless steel, and then subjected to a passivation treatment to form a passivation film on the surface. May be formed.
【００２５】さらにまた、ステンレスとしては、オース
テナイト系ステンレスだけでなく、析出硬化型ステンレ
スを用いてもよい。Further, not only austenitic stainless steel but also precipitation hardening stainless steel may be used as the stainless steel.
【００２６】またさらに、本体２２を形成するためのワ
ークとしては、加工部分や加工時間が増加するものの、
ステンレス鋳物でなく、ステンレスの丸棒や、角材を用
いてもよい。Further, as a workpiece for forming the main body 22, although a processing portion and a processing time increase,
Instead of a cast stainless steel, a stainless steel round bar or square bar may be used.
【００２７】ついで、不動態化処理を施した本体２２の
一端に弁座３１を具備する接続継手３０を螺着し、本体
２２の他端に接続継手３０の弁座３１に対して進退可能
なニードル３３を螺着し、１対の筒状枝部２３，２３の
先端部分に配管継手２５をそれぞれ螺着する。また、本
体２２にニードル３３を螺着する場合、ニードル３３に
密封装置３４を装着したうえ実行し、その後、ニードル
３３にロックナット３５を螺着する。さらにまた、ニー
ドル３３の取付軸３３ｂに図示しないノブを図示しない
止めねじで固定することにより、本実施形態のスプレー
ガン用接続金具２１の製造が完了する。Next, a connection joint 30 having a valve seat 31 is screwed onto one end of the passivated main body 22, and the other end of the main body 22 can advance and retreat with respect to the valve seat 31 of the connection joint 30. The needle 33 is screwed, and the pipe joint 25 is screwed to the tip of the pair of cylindrical branches 23, 23, respectively. When the needle 33 is screwed onto the main body 22, the sealing device 34 is attached to the needle 33 and the operation is performed. Thereafter, the lock nut 35 is screwed onto the needle 33. Furthermore, by fixing a knob (not shown) to the mounting shaft 33b of the needle 33 with a set screw (not shown), the manufacture of the spray gun connection fitting 21 of the present embodiment is completed.
【００２８】なお、配管継手２５、接続継手３０、ニー
ドル３３、ロックナット３５、図示しないノブおよび止
めねじなどの部品は、ステンレス製の市販品に不動態化
処理を施すことにより形成してもよい。Parts such as the pipe joint 25, the connection joint 30, the needle 33, the lock nut 35, the knob and the set screw (not shown) may be formed by performing a passivation process on a commercially available stainless steel product. .
【００２９】つぎに、前述した構成からなる本実施形態
の作用について説明する。Next, the operation of the present embodiment having the above-described configuration will be described.
【００３０】本実施形態のスプレーガン用接続金具１
は、接続継手３０をスプレーガンＧに螺着し、配管継手
２５の図１右方に示す一方を、例えば図示しない塗料供
給源からの水性塗料の塗料供給配管７の一端に螺着して
接続し、配管継手２５の図１左方に示す他方を、図示し
ない塗料供給源への塗料回収配管８の一端に螺着して接
続する。そして、スプレーガンＧによる塗装を実行する
際には、本体２２の内部に循環供給する水性塗料をスプ
レーガンＧに供給する場合には、図示しないノブ（図２
参照）を人手により回動させることで弁座３１に対する
ニードル３３の弁部３３ａの間隔を調整することで水性
塗料を圧力調整してスプレーガンＧに供給するととも
に、スプレーガンＧを駆動状態とすることで、塗料供給
配管７から本体２２の内部に供給される水性塗料は、接
続継手３０を通過してスプレーガンＧのノズルＮから塗
装面に噴射され、スプレーガンＧを非駆動状態とするこ
とで、塗料供給配管７から本体２２の内部に供給される
水性塗料を塗料回収配管８を通過して図示しない塗料供
給源へ回収できるようになっている。[0030] Spray gun fitting 1 of the present embodiment
Is connected by screwing the connection joint 30 to the spray gun G, and screwing one end of the pipe joint 25 shown on the right side in FIG. 1 to one end of a paint supply pipe 7 of, for example, a water-based paint from a paint supply source (not shown). Then, the other end of the pipe joint 25 shown on the left side of FIG. 1 is screwed and connected to one end of a paint collection pipe 8 to a paint supply source (not shown). Then, when performing the coating by the spray gun G, a knob (not shown in FIG.
By manually adjusting the distance between the valve portion 33a of the needle 33 and the valve seat 31 by manually rotating the spray gun G, the water paint is adjusted and supplied to the spray gun G, and the spray gun G is driven. Thus, the water-based paint supplied from the paint supply pipe 7 to the inside of the main body 22 passes through the connection joint 30 and is sprayed from the nozzle N of the spray gun G onto the painting surface, so that the spray gun G is not driven. Thus, the water-based paint supplied from the paint supply pipe 7 to the inside of the main body 22 can be collected through a paint collection pipe 8 to a paint supply source (not shown).
【００３１】この時、本実施形態のスプレーガン用接続
金具１は、従来と異なり、本体２２をろう付をせずに形
成することができるので、ステンレスの鋭敏化を確実に
防止することができるとともに、少なくとも水性塗料が
接触する部位である表面には不動態化膜が形成されてい
るので、水性塗料に凝塊が生じるのを確実に防止するこ
とができるので、スプレーガンＧのノズルＮ（図２）が
詰まったり、塗装面に部分的な凸部が生じて塗装品質が
低下するという不都合を容易かつ確実に防止することが
できる。At this time, since the connection fitting 1 for a spray gun according to the present embodiment can be formed without brazing the main body 22 unlike the conventional one, the sharpening of stainless steel can be reliably prevented. At the same time, since a passivation film is formed at least on the surface where the water-based paint comes into contact, it is possible to reliably prevent agglomeration of the water-based paint, so that the nozzle N of the spray gun G ( 2) can be easily and reliably prevented from being inconvenienced by clogging or the formation of a partial convex portion on the painted surface to deteriorate the painted quality.
【００３２】また、本実施形態のスプレーガン用接続金
具１の製造方法によれば、ステンレスの鋭敏化を確実に
防止することができるとともに、少なくとも水性塗料が
接触する表面に不動態化膜を形成する不動態化処理を容
易に行うことができるので、本実施形態のスプレーガン
用接続金具１をを容易かつ確実に製造することができ
る。Further, according to the method of manufacturing the fitting 1 for a spray gun of the present embodiment, it is possible to reliably prevent the stainless steel from being sensitized and to form a passivation film on at least the surface in contact with the water-based paint. Since the passivation process can be easily performed, the connection fitting 1 for a spray gun of the present embodiment can be easily and reliably manufactured.
【００３３】なお、本発明は、前記実施形態に限定され
るものではなく、必要に応じて種々変更することができ
る。The present invention is not limited to the above embodiment, but can be variously modified as needed.
【００３４】[0034]
【発明の効果】以上説明したように請求項１に記載の本
発明のスプレーガン用接続金具によれば、本体は、ろう
付をせずに形成することができるので、ステンレスの鋭
敏化を確実に防止することができるとともに、少なくと
も水性塗料が接触する部位には不動態化膜が形成されて
いるので、水性塗料に凝塊が生じるのを確実に防止する
ことができるなどの極めて優れた効果を奏する。As described above, according to the connection fitting for a spray gun according to the first aspect of the present invention, since the main body can be formed without brazing, the sensitization of the stainless steel is ensured. In addition, since a passivation film is formed at least in a portion where the water-based paint comes into contact with the water-based paint, it is possible to reliably prevent agglomeration from occurring in the water-based paint. To play.
【００３５】また、請求項２に記載の本発明のスプレー
ガン用接続金具の性製造方法によれば、請求項１に記載
の本発明のスプレーガン用接続金具を容易かつ確実に製
造することができるなどの極めて優れた効果を奏する。According to the second aspect of the present invention, it is possible to easily and reliably manufacture the spray gun connection fitting according to the first aspect of the present invention. It produces extremely excellent effects such as being able to do.
【図１】 本発明に係るスプレーガン用接続金具の製造
方法にしたがって形成される本発明に係るスプレーガン
用接続金具の実施形態の要部を示す一部切断正面図FIG. 1 is a partially cutaway front view showing an essential part of an embodiment of a spray gun fitting according to the present invention formed according to a method for manufacturing a spray gun fitting according to the present invention.
【図２】 従来のスプレーガン用接続金具の要部を示す
一部切断正面図FIG. 2 is a partially cut front view showing a main part of a conventional fitting for a spray gun.
７ 塗料供給管 ８ 塗料回収管 ２１ スプレーガン用接続金具 ２２ 本体 ２３ 筒状枝部 ２５ 配管継手 ３０ 接続継手 ３１ 弁座 ３３ ニードル ３３ａ 弁部 ３３ｂ 取付軸 Ｇ スプレーガン ＧＡ （スプレーガンの）塗料流入口 Ｎ （スプレーガンの）ノズル 7 Paint supply pipe 8 Paint collection pipe 21 Spray gun fitting 22 Main body 23 Cylindrical branch 25 Piping joint 30 Connection joint 31 Valve seat 33 Needle 33a Valve section 33b Mounting shaft G Spray gun GA (Spray gun) paint inlet N (spray gun) nozzle
Claims (2)
水性塗料をスプレーガンに圧力調整可能にして供給する
スプレーガン用接続金具において、 外周面に１対の筒状枝部を延出形成したほぼ筒状の少な
くとも水性塗料が接する表面に不動態化膜が形成された
ステンレス製の本体と、 前記本体をスプレーガンの塗料流入口へ接続するため前
記本体の一端に螺着され少なくとも水性塗料が接する表
面に不動態化膜が形成された弁座を具備するステンレス
製の接続継手と、 前記本体の他端に螺着され前記接続継手の弁座に対して
進退可能とされ少なくとも水性塗料が接する表面に不動
態化膜が形成されたステンレス製のニードルと、 前記１対の筒状枝部の先端部分に螺着され少なくとも水
性塗料が接する表面に不動態化膜が形成されたステンレ
ス製の配管継手と、を有することを特徴とするスプレー
ガン用接続金具。1. A spray gun fitting for supplying a water paint which is attached to a spray gun and circulated to be supplied to the spray gun while adjusting the pressure, wherein a pair of cylindrical branches are formed to extend on an outer peripheral surface. A substantially cylindrical stainless steel body having a passivation film formed on at least the surface in contact with the water-based paint; and at least one water-based paint screwed onto one end of the body to connect the body to a paint inlet of a spray gun. A stainless steel connection joint having a valve seat having a passivation film formed on the surface in contact therewith; and a water-based paint at least in contact with the valve seat of the connection joint which is screwed to the other end of the main body so as to be able to advance and retreat. A stainless steel needle having a passivation film formed on the surface thereof; and a stainless steel screw having a passivation film formed on at least the surface of the pair of cylindrical branches, which is in contact with the water-based paint. Spray gun for fitting, characterized in that it comprises the manufacturing of pipe fittings, a.
水性塗料をスプレーガンに圧力調整可能にして供給する
スプレーガン用接続金具の製造方法において、 外周面に１対の筒状枝部を延出形成したほぼ筒状のステ
ンレス製の本体を形成し、その後、前記本体の少なくと
も水性塗料が接する表面に不動態化処理を施した後、前
記本体の一端に前記本体をスプレーガンの塗料流入口へ
接続するため少なくとも水性塗料が接する表面に不動態
化処理を施した弁座を具備するステンレス製の接続継手
を螺着し、前記本体の他端に前記接続継手の弁座に対し
て進退可能な少なくとも水性塗料が接する表面に不動態
化処理を施したステンレス製のニードルを螺着し、前記
１対の筒状枝部の先端部分に少なくとも水性塗料が接す
る表面に不動態化処理を施したステンレス製の配管継手
をそれぞれ螺着することを特徴とするスプレーガン用接
続金具の製造方法。2. A method for manufacturing a fitting for a spray gun which supplies a water-based paint attached to the spray gun and supplied in a circulating manner to the spray gun in a pressure-adjustable manner, comprising a pair of cylindrical branches extending on the outer peripheral surface. After forming a substantially cylindrical stainless steel main body formed and then performing a passivation treatment on at least the surface of the main body which is in contact with the water-based paint, the main body is connected to one end of the main body by a paint inlet of a spray gun. At least the surface in contact with the water-based paint is screwed with a stainless steel connection joint having a passivated valve seat for connection to the valve, and the other end of the main body can be advanced and retracted with respect to the valve seat of the connection joint. At least a surface of the pair of cylindrical branches is screwed with a stainless steel needle which has been subjected to a passivation treatment at least on a surface in contact with the water-based paint, and a passivation treatment is performed on at least the surface of the pair of cylindrical branches contacting the water-based paint. Method for producing a spray gun for fitting to stainless steel piping joint, characterized in that screwed respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11154764A JP2000334343A (en) | 1999-06-02 | 1999-06-02 | Connection metal fitting for spray gun and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11154764A JP2000334343A (en) | 1999-06-02 | 1999-06-02 | Connection metal fitting for spray gun and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000334343A true JP2000334343A (en) | 2000-12-05 |
Family
ID=15591392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11154764A Pending JP2000334343A (en) | 1999-06-02 | 1999-06-02 | Connection metal fitting for spray gun and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000334343A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014087760A (en) * | 2012-10-31 | 2014-05-15 | Anest Iwata Corp | Spray gun |
-
1999
- 1999-06-02 JP JP11154764A patent/JP2000334343A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014087760A (en) * | 2012-10-31 | 2014-05-15 | Anest Iwata Corp | Spray gun |
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