JP4884873B2 - Coating device and cleaning method for coating device - Google Patents

Coating device and cleaning method for coating device Download PDF

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JP4884873B2
JP4884873B2 JP2006210916A JP2006210916A JP4884873B2 JP 4884873 B2 JP4884873 B2 JP 4884873B2 JP 2006210916 A JP2006210916 A JP 2006210916A JP 2006210916 A JP2006210916 A JP 2006210916A JP 4884873 B2 JP4884873 B2 JP 4884873B2
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supply path
spiral
supply
cleaning liquid
spiral member
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JP2008036479A (en
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哲也 島田
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Asahi Sunac Corp
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Description

本発明は、塗装装置及び塗装装置の洗浄方法に関するものである。   The present invention relates to a coating apparatus and a cleaning method for the coating apparatus.

塗装装置では、塗料や洗浄液の供給源から塗装ガンに至る供給路の途中に、各種の機器（例えば、ポンプ、レギュレータ、色替えバルブ、流量計、混合装置等）が介在している。これらの機器の内部や、機器と供給路との継手部等においては、流路がＬ字形に屈曲していたり、流路がＴ字形に分岐していたり、流路の内壁に凹部が形成されていたり、流路の内径の相違によって段差が形成されていたりする。このような形態の部分では、内径が一定で内壁が滑らかに連続する流路に比べると、液体の流れが悪くなるため、洗浄液を流したときに十分に洗浄することができないことがある。
その対策としては、特許文献１に、流路の途中に中子を同心状に配置した上で、中子の外周をテーパ状にすることにより、洗浄液流を乱流にして、洗浄効果の向上を図る方法が開示されている。
特開平１０−５７８４５号公報 In the coating apparatus, various devices (for example, a pump, a regulator, a color change valve, a flow meter, a mixing device, etc.) are interposed in the supply path from the supply source of paint or cleaning liquid to the coating gun. In these devices, in the joint between the device and the supply path, the flow path is bent in an L shape, the flow path is branched in a T shape, or a recess is formed on the inner wall of the flow path. Or a step is formed due to a difference in the inner diameter of the flow path. In such a portion, the flow of the liquid is worse than that of a flow path in which the inner diameter is constant and the inner wall is smoothly continuous. Therefore, the cleaning may not be sufficiently performed when the cleaning liquid is supplied.
As a countermeasure, in Patent Document 1, the core is arranged concentrically in the middle of the flow path, and the outer periphery of the core is tapered, thereby making the cleaning liquid flow turbulent and improving the cleaning effect. A method for achieving this is disclosed.
Japanese Patent Laid-Open No. 10-57845

しかし上記の方法では、乱流が形成されるのは中子の外周に沿った領域とその近傍に留まるため、中子よりも下流側では高い洗浄効果を期待できない。
本発明は上記のような事情に基づいて完成されたものであって、洗浄性能の向上を図ることを目的とする。 However, in the above method, since the turbulent flow is formed only in the region along the outer periphery of the core and in the vicinity thereof, a high cleaning effect cannot be expected on the downstream side of the core.
The present invention has been completed based on the above circumstances, and an object thereof is to improve the cleaning performance.

上記の目的を達成するための手段として、請求項１の発明は、塗料と洗浄液が流通するようになっているとともに下流端が塗装ガンに接続された供給路と、
前記供給路内に配置され、前記供給路を流れる前記洗浄液を旋回流に変化させる複数の螺旋部材とを備えており、前記各螺旋部材が、軸部の外周に螺旋状に連続する螺旋板を突出させた形態となっており、前記各螺旋部材が前記供給路に対して圧入によって組み付けられ、前記螺旋板の外周縁が、全長に亘って前記供給路の内壁に当接しており、前記複数の螺旋部材のうちの１つは、前記供給路を構成するパイプの上流端に設けられているところに特徴を有する。 As means for achieving the above object, the invention of claim 1 is characterized in that the paint and the cleaning liquid are circulated, and the downstream end is connected to the coating gun,
A plurality of spiral members that are arranged in the supply path and change the cleaning liquid flowing in the supply path into a swirl flow, and each of the spiral members includes a spiral plate that spirally continues on the outer periphery of the shaft portion. Each of the spiral members is assembled to the supply path by press-fitting, and the outer peripheral edge of the spiral plate is in contact with the inner wall of the supply path over the entire length. One of the spiral members is characterized in that it is provided at the upstream end of the pipe constituting the supply path .

請求項２の発明は、供給路を流通させて塗装ガンに塗料と洗浄液を供給するようになっている塗装装置において、前記供給路を洗浄する方法であって、前記供給路内に配置される複数の螺旋部材が、軸部の外周に螺旋状に連続する螺旋板を突出させた形態となっており、前記螺旋部材が前記供給路に対して圧入によって組み付けられ、前記螺旋板の外周縁が、全長に亘って前記供給路の内壁に当接し、前記複数の螺旋部材のうちの１つは、前記供給路を構成するパイプの上流端に設けられており、前記供給路内に前記複数の螺旋部材を配置した上で、前記複数の螺旋部材を通過する前記洗浄液を旋回流に変化させて前記供給路内を洗浄するところに特徴を有する。 The invention of claim 2 is a method of cleaning the supply path in a coating apparatus configured to supply the paint and the cleaning liquid to the coating gun through the supply path, and is disposed in the supply path. A plurality of spiral members have a form in which a spiral plate that spirally continues on the outer periphery of the shaft portion is projected, the spiral member is assembled by press-fitting into the supply path, and the outer peripheral edge of the spiral plate is , it comes into contact with the inner wall of the supply path over the entire length, wherein one of the plurality of helical members is provided on the upstream end of the pipe constituting the supply path, the plurality of the supply channel The present invention is characterized in that after the spiral member is disposed, the cleaning liquid passing through the plurality of spiral members is changed into a swirling flow to clean the inside of the supply path.

＜請求項１及び請求項２の発明＞
洗浄液は、螺旋部材を通過するときに旋回流となり、螺旋部材よりも下流側における供給路の内壁を螺旋状に擦りながら流れることによって、供給路の内壁を洗浄する。旋回流は、乱流に比べると層流に変化し難いので、螺旋部材から離れた下流側領域においても旋回流による洗浄効果が発揮される。
また、螺旋部材が、螺旋状に連続する螺旋板を備えているので、洗浄液を確実に旋回流に変えることができる。
さらに、螺旋板の外周縁が全長に亘って前記供給路の内壁に当接しているので、螺旋部材の内部や螺旋部材と供給路の内壁との間には、洗浄液を直線状に通過させる空間は存在せず、洗浄液は、軸部と供給路の内壁との間の螺旋状空間のみを通過することになる。したがって、洗浄液を乱れのない旋回流にすることができる。
また、螺旋部材を圧入によって組み付けたので、螺旋部材を固定するための部品が不要である。 <Invention of Claims 1 and 2 >
The cleaning liquid becomes a swirling flow when passing through the spiral member, and cleans the inner wall of the supply path by flowing while spirally rubbing the inner wall of the supply path on the downstream side of the spiral member. Since the swirling flow is less likely to change into a laminar flow than the turbulent flow, the cleaning effect by the swirling flow is exhibited even in the downstream region away from the spiral member.
In addition, since the spiral member includes a spiral plate that is spirally continuous, the cleaning liquid can be reliably changed into a swirl flow.
Further, since the outer peripheral edge of the spiral plate is in contact with the inner wall of the supply path over the entire length, the space through which the cleaning liquid passes linearly inside the spiral member and between the spiral member and the inner wall of the supply path. The cleaning liquid passes only through the spiral space between the shaft portion and the inner wall of the supply path. Therefore, the cleaning liquid can be made a swirl flow without any disturbance.
Further, since the spiral member is assembled by press-fitting, a part for fixing the spiral member is unnecessary.

＜実施形態１＞
以下、本発明を具体化した実施形態１を図１乃至図７を参照して説明する。本実施形態の塗装装置は、複数種（本実施形態では２種類であるが、３種類以上でもよい）の塗料Ｐａ，Ｐｂを選択して塗装ガン３０に供給するようにしたものであり、塗料供給源１１、洗浄液供給源１２、下流端に塗装ガン３０が接続されている供給路１３、サクションポンプ２０、供給路１３の途中に設けたレギュレータ１５とを備えて構成されている。 <Embodiment 1>
A first embodiment of the present invention will be described below with reference to FIGS. The coating apparatus of this embodiment is configured to select and supply a plurality of types of paints Pa and Pb (two types in this embodiment, but three or more types) to the coating gun 30. A supply source 11, a cleaning liquid supply source 12, a supply path 13 to which a coating gun 30 is connected at the downstream end, a suction pump 20, and a regulator 15 provided in the middle of the supply path 13 are configured.

塗料供給源１１は、上面が開放された複数のタンク１１ａ，１１ｂ内に複数種類の塗料Ｐａ，Ｐｂを個別に貯留したものであり、洗浄液供給源１２は、上面が開放されたタンク１２ｗ内に洗浄液Ｗを貯留したものである。これらの供給源１１，１２が配置されているブースには、サクションポンプ２０が設けられている。サクションポンプ２０は、図５に示すように、ポンプ本体２１と、ポンプ本体２１の吸引口２２に接続された可撓性を有する吸引ホース２３と、この吸引ホース２３の下流端に接続された可撓性を有しない吸引パイプ２４と、この吸引パイプ２４の下流端に取り付けられたフィルタ２５とから構成される周知のものである。吸引ホース２３と吸引パイプ２４とフィルタ２５は、供給路１３を構成する。フィルタ２５をいずれからのタンク１１ａ，１１ｂ，１２ｗ内の液体（塗料Ｐａ，Ｐｂまたは洗浄液Ｗ）に浸漬させた状態で、ポンプ本体２１内に設けた吸引機構（図示せず）を作動させると、その液体がフィルタ２５と吸引パイプ２４と吸引ホース２３を介してポンプ本体２１内に吸い上げられ、ポンプ本体２１の吐出口（図示せず）から下流側（塗装ガン３０側）へ吐出されるようになっている。   The paint supply source 11 stores a plurality of types of paints Pa and Pb individually in a plurality of tanks 11a and 11b whose upper surfaces are opened. The cleaning liquid supply source 12 is stored in a tank 12w whose upper surface is opened. The cleaning liquid W is stored. A suction pump 20 is provided in the booth where the supply sources 11 and 12 are arranged. As shown in FIG. 5, the suction pump 20 includes a pump main body 21, a flexible suction hose 23 connected to the suction port 22 of the pump main body 21, and a pump connected to the downstream end of the suction hose 23. The suction pipe 24 has no flexibility, and the filter 25 is attached to the downstream end of the suction pipe 24. The suction hose 23, the suction pipe 24, and the filter 25 constitute the supply path 13. When the filter 25 is immersed in the liquid (paint Pa, Pb or cleaning liquid W) in any of the tanks 11a, 11b, 12w, a suction mechanism (not shown) provided in the pump body 21 is operated. The liquid is sucked into the pump body 21 through the filter 25, the suction pipe 24, and the suction hose 23, and discharged from the discharge port (not shown) of the pump body 21 to the downstream side (coating gun 30 side). It has become.

サクションポンプ２０の吸引口２２と吸引ホース２３との接続部では、吸引ホース２３が外嵌されている継手２６と吸引口２２との間の内径差に起因する段差部２７が形成されているが、この段差部２７における洗浄性を高めるために、継手２６における吸引口２２から遠い位置（段差部２７よりも上流側の位置）には、螺旋部材４０が取り付けられている。また、吸引パイプ２４と吸引ホース２３との接続部分おいては、吸引ホース２３が吸引パイプ２４に外嵌されていて、吸引パイプ２４と吸引ホース２３との間の内径差に起因する段差部２８が形成されているが、この段差部２８における洗浄性を高めるために、吸引パイプ２４の下流端（即ち、段差部２８よりも上流側）に、螺旋部材４０が取り付けられている。さらに、吸引パイプ２４の上流端にも、螺旋部材４０が設けられている。   At the connection portion between the suction port 22 and the suction hose 23 of the suction pump 20, a stepped portion 27 is formed due to a difference in inner diameter between the joint 26 to which the suction hose 23 is fitted and the suction port 22. In order to enhance the cleanability of the stepped portion 27, a spiral member 40 is attached to a position far from the suction port 22 in the joint 26 (a position upstream of the stepped portion 27). In addition, at the connection portion between the suction pipe 24 and the suction hose 23, the suction hose 23 is externally fitted to the suction pipe 24, and the step portion 28 resulting from the difference in inner diameter between the suction pipe 24 and the suction hose 23. However, in order to improve the cleanability of the stepped portion 28, a spiral member 40 is attached to the downstream end of the suction pipe 24 (that is, upstream of the stepped portion 28). Furthermore, a spiral member 40 is also provided at the upstream end of the suction pipe 24.

サクションポンプ２０の吐出口には、供給路１３を構成する可撓性を有しない供給パイプ１３Ｐの上流端が接続されている。そして、供給パイプ１３Ｐの下流端には、可撓性を有する供給ホース１３Ｈの上流端が接続され、供給パイプ１３Ｐの下流端には、塗装ガン３０が接続されている。そして、図６に示すように、供給パイプ１３Ｐと供給ホース１３Ｈの内部にも、夫々、螺旋部材４０が設けられている。尚、レギュレータ１５は、供給パイプ１３Ｐの途中、供給パイプ１３Ｐと供給ホース１３Ｈとの接続部分、供給ホース１３Ｈの途中のいずれかの位置に設けられている。   An upstream end of a supply pipe 13 </ b> P that does not have flexibility and constitutes the supply path 13 is connected to the discharge port of the suction pump 20. The upstream end of the flexible supply hose 13H is connected to the downstream end of the supply pipe 13P, and the coating gun 30 is connected to the downstream end of the supply pipe 13P. And as shown in FIG. 6, the helical member 40 is provided also in the inside of the supply pipe 13P and the supply hose 13H, respectively. In addition, the regulator 15 is provided in the middle of the supply pipe 13P, the connection part of the supply pipe 13P and the supply hose 13H, and the position in the middle of the supply hose 13H.

塗装ガン３０の内部には、図７に示すように、ニードル３２が挿通されてノズル３３に至る供給孔３１と、供給孔３１に対して直角に分岐した流入側分岐孔３４Ａと、供給孔３１に対して直角に分岐した流出側分岐孔３４Ｂとが形成されている。供給孔３１の内壁における流入側分岐孔３４Ａと流出側分岐孔３４Ｂの開口部は、互いに概ね対向するように位置している。また、塗装ガン３０の外面には流入継手３５Ａと流出継手３５Ｂが取り付けられている。流入継手３５Ａの内部には、Ｌ字形に屈曲した流入孔３６Ａが貫通して形成され、この流入孔３６Ａの下流端が流入側分岐孔３４Ａに接続されている。また、流入孔３６Ａの上流端には供給ホース１３Ｈの下流端が接続されている。流出継手３５Ｂの内部には、Ｌ字形に屈曲した流出孔３６Ｂが貫通して形成され、この流出孔３６Ｂの上流端が流出側分岐孔３４Ｂに接続されている。尚、流出孔３６Ｂの下流端には、下流端がドレンタンク（図示せず）に接続された排出路（図示せず）の上流端が接続されている。   As shown in FIG. 7, inside the coating gun 30, a supply hole 31 through which the needle 32 is inserted to reach the nozzle 33, an inflow side branch hole 34 </ b> A branched at right angles to the supply hole 31, and the supply hole 31. And an outflow side branch hole 34B branched at a right angle to each other. The openings of the inflow side branch hole 34A and the outflow side branch hole 34B in the inner wall of the supply hole 31 are positioned so as to be generally opposed to each other. An inflow joint 35 </ b> A and an outflow joint 35 </ b> B are attached to the outer surface of the coating gun 30. An inflow hole 36A bent in an L shape is formed through the inflow joint 35A, and the downstream end of the inflow hole 36A is connected to the inflow side branch hole 34A. The downstream end of the supply hose 13H is connected to the upstream end of the inflow hole 36A. An outflow hole 36B bent in an L shape is formed through the outflow joint 35B, and an upstream end of the outflow hole 36B is connected to the outflow side branch hole 34B. The downstream end of the outflow hole 36B is connected to the upstream end of a discharge path (not shown) whose downstream end is connected to a drain tank (not shown).

塗装ガン３０の内部においては、流入孔３６Ａの下流端と流入側分岐孔３４Ａとの内径差に起因する段差部３７Ａが形成されており、流入側分岐孔３４Ａの内径は流入孔３６Ａ側に比べて供給孔３１側が縮径するように変化しており、流入側分岐孔３４Ａの内周には流入継手３５Ａを接続するための雌ネジ部３８Ａの溝が形成されており、流入側分岐孔３４Ａと供給孔３１との接続部分がＴ字形をなしており、流出側分岐孔３４Ｂと供給孔３１との接続部分がＴ字形をなしており、流出側分岐孔３４Ｂの内径は供給孔３１側に比べて流出孔３６Ｂ側が拡径するように変化しており、流出側分岐孔３４Ｂの内周には流出継手３５Ｂを接続するための雌ネジ部３８Ｂの溝が形成されており、流出孔３６Ｂの上流端と流出側分岐孔３４Ｂとの内径差に起因する段差部３７Ｂが形成されていることに鑑み、これらの部分（３７Ａ，３４Ａ，３８Ａ，３４Ｂ，３８Ｂ，３７Ｂ）の洗浄性を高めるために、流入孔３６Ａの下流端に螺旋部材４０が設けられている。また、流出孔３６ＢがＬ字形に屈曲していることに鑑み、流出孔３６Ｂ内の洗浄性を高めるために、流出孔３６Ｂの上流端にも螺旋部材４０が設けられている。   Inside the coating gun 30, a stepped portion 37A is formed due to a difference in inner diameter between the downstream end of the inflow hole 36A and the inflow side branch hole 34A. The inner diameter of the inflow side branch hole 34A is larger than that of the inflow hole 36A. The supply hole 31 side is reduced in diameter, and a groove of a female screw portion 38A for connecting the inflow joint 35A is formed on the inner periphery of the inflow side branch hole 34A. And the supply hole 31 has a T-shaped connection portion, and the connection portion between the outflow side branch hole 34B and the supply hole 31 has a T shape. The inner diameter of the outflow side branch hole 34B is on the supply hole 31 side. Compared with the outflow hole 36B, the diameter of the outflow hole 36B is increased, and a groove of the female screw portion 38B for connecting the outflow joint 35B is formed on the inner periphery of the outflow side branch hole 34B. Inner diameter difference between upstream end and outflow side branch hole 34B In view of the formation of the resulting stepped portion 37B, a spiral member 40 is provided at the downstream end of the inflow hole 36A in order to improve the cleanability of these portions (37A, 34A, 38A, 34B, 38B, 37B). It has been. Further, in view of the fact that the outflow hole 36B is bent in an L shape, a spiral member 40 is also provided at the upstream end of the outflow hole 36B in order to improve the cleaning performance in the outflow hole 36B.

次に、螺旋部材４０について説明する。
螺旋部材４０は、塗料Ｐａ，Ｐｂの供給圧や洗浄液Ｗの供給圧によって弾性撓みしない程度の剛性を有する材料（例えば、金属や合成樹脂）からなる。螺旋部材４０は、円形断面であって塗料Ｐａ，Ｐｂ及び洗浄液Ｗの供給路１３に比べて十分に径の小さい軸部４１と、軸部４１の外周から径方向外側へ突出する１枚の螺旋板４２とを一体に形成した形態となっている。螺旋板４２は、軸部４１の外周から螺旋状に突出しており、軸部４１を少なくとも１周する範囲に亘って形成されている。また、軸部４１の軸線方向に視たときの螺旋板４２の外周縁は、軸部４１と同心の円形をなしている。かかる螺旋部材４０は、上記した供給路１３のうちパイプのように剛性の高い部分おいては圧入によって組み付けられるとともに、ホースのように可撓性を有する部部においては供給路１３を構成する壁部を拡径変形させて組み付けられる。組付け状態では、螺旋板４２の外周縁と供給路１３の内壁との間に生じる摩擦抵抗によって組付け状態に保持されている。上記の流路は、いずれも円形断面であるため、組付け状態では、螺旋部材４０（軸部４１及び螺旋板４２）は供給路１３と同心に配置される。 Next, the spiral member 40 will be described.
The spiral member 40 is made of a material (for example, metal or synthetic resin) having such a rigidity that it is not elastically bent by the supply pressure of the paints Pa and Pb and the supply pressure of the cleaning liquid W. The spiral member 40 has a circular cross section and a sufficiently small diameter compared with the supply paths 13 of the paints Pa, Pb and the cleaning liquid W, and one spiral projecting radially outward from the outer periphery of the shaft part 41. The plate 42 is integrally formed. The spiral plate 42 protrudes in a spiral shape from the outer periphery of the shaft portion 41, and is formed over a range that goes around the shaft portion 41 at least once. Further, the outer peripheral edge of the spiral plate 42 when viewed in the axial direction of the shaft portion 41 is a concentric circle with the shaft portion 41. The helical member 40 is assembled by press-fitting in a portion having high rigidity such as a pipe in the supply passage 13 described above, and a wall constituting the supply passage 13 in a flexible portion such as a hose. It is assembled by expanding the diameter of the part. In the assembled state, the assembled state is maintained by frictional resistance generated between the outer peripheral edge of the spiral plate 42 and the inner wall of the supply path 13. Since each of the flow paths has a circular cross section, the spiral member 40 (the shaft portion 41 and the spiral plate 42) is disposed concentrically with the supply path 13 in the assembled state.

次に、本実施形態の作用を説明する。
上記のようにサクションポンプ２０のフィルタ２５から塗装ガン３０に至る塗料Ｐａ，Ｐｂの供給路１３内には塗料Ｐａ，Ｐｂが流れるが、この塗料Ｐａ，Ｐｂが流れる供給路１３内には、適所に螺旋部材４０が設けられている。洗浄する際には、サクションポンプ２０のフィルタ２５をタンク１２ｗ内の洗浄液Ｗ中に浸漬してサクションポンプ２０を駆動し、塗料Ｐａ，Ｐｂの供給路１３内に洗浄液Ｗを流す。洗浄液Ｗは、塗装ガン３０側へ流れつつ、供給路１３の内壁に付着した塗料Ｐａ，Ｐｂを除去している。また、塗装ガン３０に供給された洗浄液Ｗの一部はノズル３３から噴出されるが、残りの洗浄液Ｗは流出継手３５Ｂからドレンタンクへ排出される。 Next, the operation of this embodiment will be described.
As described above, the paints Pa and Pb flow in the supply path 13 of the paint Pa and Pb from the filter 25 of the suction pump 20 to the coating gun 30, but in the supply path 13 through which the paint Pa and Pb flows, an appropriate place. A spiral member 40 is provided on the surface. When cleaning, the filter 25 of the suction pump 20 is immersed in the cleaning liquid W in the tank 12w to drive the suction pump 20, and the cleaning liquid W is caused to flow into the supply paths 13 for the paints Pa and Pb. The cleaning liquid W removes the paints Pa and Pb adhering to the inner wall of the supply path 13 while flowing toward the coating gun 30. A part of the cleaning liquid W supplied to the coating gun 30 is ejected from the nozzle 33, but the remaining cleaning liquid W is discharged from the outflow joint 35B to the drain tank.

さて、供給路１３内に供給される洗浄液Ｗは、概ね層流となって流れるのであるが、螺旋部材４０を通過するときには、流れの向きが螺旋板４２に沿って転向させられるため、図２に示すように、洗浄液Ｗは層流から旋回流に変化する。この旋回流は、供給路１３の内壁に沿って螺旋状に移動することから、供給路１３の内壁に付着している塗料Ｐａ，Ｐｂを効果的に除去できる。   The cleaning liquid W supplied into the supply path 13 flows in a laminar flow, but when passing through the spiral member 40, the flow direction is turned along the spiral plate 42. As shown, the cleaning liquid W changes from a laminar flow to a swirling flow. Since this swirling flow spirally moves along the inner wall of the supply path 13, the paints Pa and Pb adhering to the inner wall of the supply path 13 can be effectively removed.

また、旋回流は、供給路１３の内壁に沿って螺旋状、つまり供給路１３の長さ方向に対して斜め方向（即ち、概ね周方向）に移動するので、供給路１３の内径の違いに起因する段差部においても洗浄液Ｗの流れが停滞することがなく、段差部に付着した塗料Ｐａ，Ｐｂを確実に除去することができる。さらに、供給路１３のうちＬ字形の部分やＴ字形の部分においても、旋回流の洗浄液Ｗが通過するときに旋回流から乱流に変化することにより、洗浄液ＷがＬ字形やＴ字形の供給路１３の内壁のほぼ全領域を擦ることになるので、付着した塗料Ｐａ，Ｐｂを確実に除去することができる。また、乱流に比べて旋回流は、層流に戻り難いことから、螺旋部材４０から下流側に離れた部分おいても、洗浄液Ｗは旋回流の状態を保つ。したがって、旋回流による洗浄効果は、供給路１３の長い範囲に亘って発揮される。   In addition, the swirling flow moves spirally along the inner wall of the supply path 13, that is, in an oblique direction (that is, generally in the circumferential direction) with respect to the length direction of the supply path 13. Even in the resulting stepped portion, the flow of the cleaning liquid W does not stagnate, and the paints Pa and Pb adhering to the stepped portion can be reliably removed. Further, in the L-shaped portion and the T-shaped portion of the supply path 13, the cleaning liquid W is supplied in an L shape or a T shape by changing from the swirling flow to the turbulent flow when the swirling flow cleaning liquid W passes through. Since almost the entire region of the inner wall of the path 13 is rubbed, the adhered paints Pa and Pb can be reliably removed. Further, since the swirl flow is less likely to return to the laminar flow as compared with the turbulent flow, the cleaning liquid W maintains the swirl flow state even at a portion away from the spiral member 40 on the downstream side. Therefore, the cleaning effect by the swirl flow is exhibited over a long range of the supply path 13.

上述のように本実施形態では、供給路１３内に螺旋部材４０を配置して洗浄液Ｗを旋回流に変化させつつ洗浄するようにしたので、高い洗浄効果を得ることができる。
また、螺旋部材４０は、軸部４１の外周に螺旋状に連続する螺旋板４２を突出させた形態となっているが、このように螺旋状に連続する螺旋板４２を設けたことにより、洗浄液Ｗを確実に旋回流に変えることができる。
また、螺旋部材４０を供給路１３に対して圧入によって組み付けているので、螺旋部材４０を供給路１３に固定するための部品が不要である。
また、螺旋板４２の外周縁が、全長に亘って供給路１３の内壁に当接しているので、螺旋部材４０の内部や螺旋部材４０と供給路１３の内壁との間には、洗浄液Ｗを直線状に通過させる空間は存在せず、洗浄液Ｗは、軸部４１と供給路１３の内壁との間の螺旋状空間のみを通過することになる。したがって、洗浄液Ｗを乱れのない旋回流にすることができる。 As described above, in the present embodiment, the spiral member 40 is disposed in the supply path 13 to perform cleaning while changing the cleaning liquid W into a swirling flow, so that a high cleaning effect can be obtained.
In addition, the spiral member 40 has a form in which a spiral plate 42 that spirally continues on the outer periphery of the shaft portion 41. In this way, by providing the spiral plate 42 that spirally continues, the cleaning liquid is provided. W can be reliably changed to a swirl flow.
In addition, since the spiral member 40 is assembled by press-fitting into the supply path 13, a part for fixing the spiral member 40 to the supply path 13 is unnecessary.
Further, since the outer peripheral edge of the spiral plate 42 is in contact with the inner wall of the supply path 13 over the entire length, the cleaning liquid W is introduced between the interior of the spiral member 40 and between the spiral member 40 and the inner wall of the supply path 13. There is no space for linear passage, and the cleaning liquid W passes only through the spiral space between the shaft portion 41 and the inner wall of the supply path 13. Therefore, the cleaning liquid W can be made a swirl flow without any disturbance.

＜実施形態２＞
次に、本発明を具体化した実施形態２を図８を参照して説明する。本実施形態２では、実施形態１とは異なる形態の塗装ガン５０に螺旋部材４０を取り付けている。塗装ガン５０は、ノズル５１に至る供給孔５２の途中に、内径が供給孔５２よりも小径の筒状部材５３が設けたものであって、供給孔５２の途中には、筒状部材５３との内径差に起因する段差部５４が形成されている。螺旋部材４０は、供給孔５２における段差部５４（筒状部材５３）よりも上流側の位置に配置されている。螺旋部材４０の構成は上記実施形態１と同じであるため、構造、作用及び効果の説明は省略する。 <Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the spiral member 40 is attached to a coating gun 50 having a different form from the first embodiment. The coating gun 50 is provided with a cylindrical member 53 having an inner diameter smaller than that of the supply hole 52 in the middle of the supply hole 52 reaching the nozzle 51. A stepped portion 54 resulting from the difference in inner diameter is formed. The spiral member 40 is disposed at a position upstream of the step portion 54 (tubular member 53) in the supply hole 52. Since the configuration of the spiral member 40 is the same as that of the first embodiment, description of the structure, operation, and effect is omitted.

＜実施形態３＞
次に、本発明を具体化した実施形態３を図９を参照して説明する。本実施形態３では、塗料タンク６０の下面に供給路６１を接続している。供給路６１は、塗料タンク６０の供給口６２に接続されたストレート形状の第１継手６３と、第１継手６３の下流端に接続されたＬ字形の第２継手６４と、第２継手６４の下流端に接続されたパイプ６５とを備えている。第１継手６３と第２継手６４との接続部分には、両継手６３，６４の内径差に起因する段差部６６が形成され、この段差部６６における洗浄性と第２継手６４内の洗浄性を高めるため、第１継手６３内には螺旋部材４０が設けられている。また、パイプ６５の上流端にも螺旋部材４０が設けられている。螺旋部材４０の構成は上記実施形態１と同じであるため、構造、作用及び効果の説明は省略する。 <Embodiment 3>
Next, a third embodiment of the present invention will be described with reference to FIG. In the third embodiment, a supply path 61 is connected to the lower surface of the paint tank 60. The supply path 61 includes a straight first joint 63 connected to the supply port 62 of the paint tank 60, an L-shaped second joint 64 connected to the downstream end of the first joint 63, and a second joint 64. And a pipe 65 connected to the downstream end. A stepped portion 66 resulting from a difference in inner diameter between the joints 63 and 64 is formed at a connection portion between the first joint 63 and the second joint 64, and the cleaning performance in the stepped portion 66 and the cleaning performance in the second joint 64 are formed. In order to increase the speed, the spiral member 40 is provided in the first joint 63. A spiral member 40 is also provided at the upstream end of the pipe 65. Since the configuration of the spiral member 40 is the same as that of the first embodiment, description of the structure, operation, and effect is omitted.

＜実施形態４＞
次に、本発明を具体化した実施形態４を図１０を参照して説明する。本実施形態４では、色替えバルブ７０内に螺旋部材４０を設けている。色替えバルブ７０は、供給路に接続された共用流路７１と、この共用流路７１に連なる複数（本実施形態では４つ）の開閉弁７２とを備え、開閉弁７２の弁口７３から共用流路７１に至る分岐路７４は、共用流路７１に対して直角に連通している。各分岐路７４と共用流路７１とはＴ字形に連なっている。そして、共用流路７１内の上流端側の位置には螺旋部材４０が配置されている。この螺旋部材４０により、共用流路７１内に洗浄液Ｗの旋回流が形成され、螺旋部材４０よりも下流側における分岐路７４と共用流路７１とのＴ字形の接続部分、及び螺旋部材４０よりも下流側に位置する分岐路７４内が効果的に洗浄される。螺旋部材４０の構成は上記実施形態１と同じであるため、構造、作用及び効果の説明は省略する。 <Embodiment 4>
Next, a fourth embodiment of the present invention will be described with reference to FIG. In the fourth embodiment, the spiral member 40 is provided in the color change valve 70. The color change valve 70 includes a common flow path 71 connected to the supply path, and a plurality (four in the present embodiment) of on-off valves 72 connected to the common flow path 71, and from the valve port 73 of the on-off valve 72. A branch path 74 that reaches the common flow path 71 communicates with the common flow path 71 at a right angle. Each branch channel 74 and the common channel 71 are connected in a T shape. A spiral member 40 is disposed at a position on the upstream end side in the common flow channel 71. The spiral member 40 forms a swirling flow of the cleaning liquid W in the shared flow path 71, and a T-shaped connection portion between the branch path 74 and the shared flow path 71 on the downstream side of the spiral member 40, and the spiral member 40. In addition, the inside of the branch path 74 located on the downstream side is effectively cleaned. Since the configuration of the spiral member 40 is the same as that of the first embodiment, description of the structure, operation, and effect is omitted.

＜実施形態５＞
次に、本発明を具体化した実施形態５を図１１を参照して説明する。本実施形態５では、塗料フィルタ８０に螺旋部材４０を設けている。塗料フィルタ８０は、フィルタ本体８１の下端部に、流入孔８２Ａと流入孔８２Ｂとが形成され、流入孔８２Ａには流入継手８３Ａが接続され、流出孔８２Ｂには流出継手８３Ｂが接続されている。流入継手８３Ａの接続部分においては、流入孔８２Ａとの内径差に起因する段差部８４Ａが形成され、流入孔８２Ａは流入継手８３Ａ側からフィルタ本体８１側に向かって縮径するように内径が変化しており、流入孔８２Ａには流入継手８３Ａを接続するための雌ネジ孔８５Ａの溝が形成されているため、これらの部分の洗浄性を高めるために、流入継手８３Ａ内に螺旋部材４０が配置されている。また、流出孔８２Ｂ内には流出継手８３Ｂを接続するための雌ネジ孔８５Ｂが形成されており、流出孔８２Ｂと流出継手８３Ｂとの接続部分には、流出孔８２Ｂと流出継手８３Ｂの内径差に起因する段差部８４Ｂが形成されているため、これらの部分の洗浄性を高めるために、流入孔８２Ｂにおける雌ネジ部８５Ｂよりも上流側の位置に螺旋部材４０が配置されている。螺旋部材４０の構成は上記実施形態１と同じであるため、構造、作用及び効果の説明は省略する。 <Embodiment 5>
Next, a fifth embodiment of the present invention will be described with reference to FIG. In the fifth embodiment, the spiral member 40 is provided in the paint filter 80. In the paint filter 80, an inflow hole 82A and an inflow hole 82B are formed at the lower end of the filter body 81, an inflow joint 83A is connected to the inflow hole 82A, and an outflow joint 83B is connected to the outflow hole 82B. . In the connection portion of the inflow joint 83A, a stepped portion 84A is formed due to the difference in inner diameter with the inflow hole 82A, and the inner diameter of the inflow hole 82A changes so that the diameter decreases from the inflow joint 83A side toward the filter body 81 side. Since the groove of the female screw hole 85A for connecting the inflow joint 83A is formed in the inflow hole 82A, the spiral member 40 is provided in the inflow joint 83A in order to improve the cleanability of these portions. Has been placed. Further, a female screw hole 85B for connecting the outflow joint 83B is formed in the outflow hole 82B, and an inner diameter difference between the outflow hole 82B and the outflow joint 83B is formed at a connection portion between the outflow hole 82B and the outflow joint 83B. Therefore, in order to improve the cleaning performance of these portions, the spiral member 40 is disposed at a position upstream of the female screw portion 85B in the inflow hole 82B. Since the configuration of the spiral member 40 is the same as that of the first embodiment, description of the structure, operation, and effect is omitted.

＜他の実施形態＞
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施態様も本発明の技術的範囲に含まれる。
（１）螺旋板の外周縁と供給路の内壁との間に隙間があってもよい。つまり、螺旋板の外周縁が部分的に供給路の内壁に当接する形態であってもよい。
（２）螺旋部材は、上記実施形態に記載した機器に限らず、レギュレータの内部、色替えバルブ以外の各種バルブの内部に設けてもよい。また、供給路を構成するパイプやホースと機器との継手部分に設けてもよい。
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) There may be a gap between the outer peripheral edge of the spiral plate and the inner wall of the supply path. That is, the outer peripheral edge of the spiral plate may partially abut against the inner wall of the supply path .
(2 ) The spiral member is not limited to the device described in the above embodiment, and may be provided inside the regulator and inside various valves other than the color changing valve. Moreover, you may provide in the joint part of the pipe and hose which comprise a supply path, and an apparatus .

実施形態１の塗装装置の概略図Schematic of the coating apparatus of Embodiment 1 螺旋部材の斜視図Perspective view of spiral member 螺旋部材の側面図Side view of spiral member 螺旋部材の正面図Front view of spiral member サクションポンプに螺旋部材を組み付けた状態をあらわす部分断面図Partial sectional view showing the state that the spiral member is assembled to the suction pump 塗装ガンに至るホース内に螺旋部材を組み付けた状態をあらわす断面図Sectional view showing the state where the spiral member is assembled in the hose leading to the paint gun 塗装ガン内に螺旋部材を組み付けた状態をあらわす部分断面図Partial cross-sectional view showing the state where the spiral member is assembled in the paint gun 実施形態２において塗装ガン内に螺旋部材を組み付けた状態をあらわす部分断面図The fragmentary sectional view showing the state which assembled | attached the spiral member in the coating gun in Embodiment 2. 実施形態３において塗料タンクに螺旋部材を組み付けた状態をあらわす部分断面図The fragmentary sectional view showing the state where the spiral member was assembled | attached to the paint tank in Embodiment 3. 実施形態４において色替えバルブ内に螺旋部材を組み付けた状態をあらわす断面図Sectional drawing showing the state which assembled | attached the spiral member in the color change valve in Embodiment 4. 実施形態５において塗料フィルタ内に螺旋部材を組み付けた状態をあらわす断面図Sectional drawing showing the state which assembled | attached the spiral member in the paint filter in Embodiment 5.

符号の説明Explanation of symbols

１３…供給路
３０…塗装ガン
４０…螺旋部材
４１…軸部
４２…螺旋板 DESCRIPTION OF SYMBOLS 13 ... Supply path 30 ... Paint gun 40 ... Spiral member 41 ... Shaft part 42 ... Spiral plate

Claims (2)

塗料と洗浄液が流通するようになっているとともに下流端が塗装ガンに接続された供給路と、
前記供給路内に配置され、前記供給路を流れる前記洗浄液を旋回流に変化させる複数の螺旋部材とを備えており、
前記各螺旋部材が、軸部の外周に螺旋状に連続する螺旋板を突出させた形態となっており、
前記各螺旋部材が前記供給路に対して圧入によって組み付けられ、前記螺旋板の外周縁が、全長に亘って前記供給路の内壁に当接しており、
前記複数の螺旋部材のうちの１つは、前記供給路を構成するパイプの上流端に設けられていることを特徴とする塗装装置。 A supply path in which the paint and cleaning liquid circulate and the downstream end is connected to the paint gun;
A plurality of spiral members that are arranged in the supply path and change the cleaning liquid flowing in the supply path into a swirling flow ;
Each of the spiral members has a form in which a spiral plate that is spirally continuous on the outer periphery of the shaft portion is projected,
Each spiral member is assembled by press-fitting into the supply path, and the outer peripheral edge of the spiral plate is in contact with the inner wall of the supply path over the entire length,
One of the plurality of spiral members is provided at an upstream end of a pipe constituting the supply path . 供給路を流通させて塗装ガンに塗料と洗浄液を供給するようになっている塗装装置において、前記供給路を洗浄する方法であって、
前記供給路内に配置される複数の螺旋部材が、軸部の外周に螺旋状に連続する螺旋板を突出させた形態となっており、前記螺旋部材が前記供給路に対して圧入によって組み付けられ、前記螺旋板の外周縁が、全長に亘って前記供給路の内壁に当接し、前記複数の螺旋部材のうちの１つは、前記供給路を構成するパイプの上流端に設けられており、
前記供給路内に前記複数の螺旋部材を配置した上で、
前記複数の螺旋部材を通過する前記洗浄液を旋回流に変化させて前記供給路内を洗浄することを特徴とする塗装装置の洗浄方法。 In a coating apparatus configured to circulate the supply path and supply the paint and cleaning liquid to the coating gun, the method for cleaning the supply path,
The plurality of spiral members arranged in the supply path has a form in which a spiral plate that spirally continues on the outer periphery of the shaft portion is protruded, and the spiral member is assembled to the supply path by press-fitting. The outer peripheral edge of the spiral plate is in contact with the inner wall of the supply path over the entire length, and one of the plurality of spiral members is provided at the upstream end of the pipe constituting the supply path,
After arranging the plurality of spiral members in the supply path,
A cleaning method for a coating apparatus, wherein the inside of the supply path is cleaned by changing the cleaning liquid passing through the plurality of spiral members into a swirling flow.
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