JP2004154620A - Coating apparatus and coating method - Google Patents

Coating apparatus and coating method Download PDF

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Publication number
JP2004154620A
JP2004154620A JP2002320134A JP2002320134A JP2004154620A JP 2004154620 A JP2004154620 A JP 2004154620A JP 2002320134 A JP2002320134 A JP 2002320134A JP 2002320134 A JP2002320134 A JP 2002320134A JP 2004154620 A JP2004154620 A JP 2004154620A
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Japan
Prior art keywords
coating
gas
coated
booth
component
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JP2002320134A
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Japanese (ja)
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JP3971986B2 (en
Inventor
Yoshio Nozawa
佳夫 野沢
Yoichi Imanishi
陽一 今西
Masaru Nakayama
勝 中山
Masamichi Kurokawa
正通 黒川
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Saitec Co Ltd
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Saitec Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent dropped coating particles from rebounding on a component to be coated to prevent the deterioration of a coating state. <P>SOLUTION: This coating apparatus is constituted so as to allow the open air introduced into a drying chamber 5 to flow into a coating booth 1 as a laminar flow to discharge the same to the outside through an exhaust chamber 9. Coating work is applied to the component W to be coated set on the component support legs 53 and 55 of a component receiving stand 41 within the laminar flow by a coating robot R. At this time, air is sprayed toward the vicinity of the component W to be coated from an air jet nozzle 43 to blow off dropped coating particles. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
この発明は、塗装ブース内に層流となる気流を発生させ、この層流の中で被塗装部品に対して塗装作業を行う塗装装置および塗装方法に関する。
【0002】
【従来の技術】
従来のこの種の塗装装置としては、例えば特許文献1に記載されたものが知られている。
【0003】
【特許文献1】
特開平11−179255号公報
【0004】
この公報記載の発明は、塗装作業を行う塗装ブースの一方の側から外気を取り入れ、この取り入れた外気を塗装ブースを経由して塗装ブースの他方の側に排気する際に、塗装ブース内の空気の流れを均一な層流状態となるようにしている。これにより、塗装ブース内での汚染空気の拡散防止および滞留防止を図っている。
【0005】
【発明が解決しようとする課題】
しかしながら、上記した従来の塗装装置においては、単に、層流状態の中で塗装作業を行っているので、塗装ブース内の全体の空気の流れとしては層流となっているものの、被塗装部品近傍ではブース内の層流の流れとは別に被塗装部品に向けて吹き付けた塗料の流れが存在する。そして、この被塗装部品に向けて吹き付けた塗料の粒子が被塗装部品の近傍で下方に落下し、この落下した塗料の粒子が跳ね上がって被塗装部品に付着し、塗装状態が悪化するという問題がある。
【0006】
そこで、この発明は、落下した塗料粒子の被塗装部品への跳ね返りを防止して、塗装状態の悪化を防止することを目的としている。
【0007】
【課題を解決するための手段】
前記目的を達成するために、この発明は、塗装ブース内の気流を層流状態とし、この層流状態の中で被塗装部品に対して塗装作業を行う塗装装置において、前記被塗装部品の近傍に、前記塗装ブース内の層流とは別に気体を吹き付ける気体吹付手段を設けた構成としてある。
【0008】
【発明の効果】
この発明によれば、被塗装部品の近傍に、塗装ブース内の層流とは別に気体をを吹き付けるようにしたので、被塗装部品に向けて吹き付けた塗料の粒子が下方に落下しても、この落下した塗料粒子は、吹き付けた気体によって層流状態の気流の下流側に流され、被塗装部品への付着を防止でき、塗装状態の悪化を防止することができる。
【0009】
【発明の実施の形態】
以下、この発明の実施の形態を図面に基づき説明する。
【0010】
図1は、この発明の実施の一形態を示す塗装装置の内部構造の概略を示す側面図、図2は同平面図、図3は、その全体構成を示す斜視図、図4は、被塗装部品Wに対して塗装ロボットRにより塗装作業を行っている状態を示す斜視図である。
【0011】
図3に示すように、この塗装装置は、互いに隣接する2つの塗装ブース1,3を備えており、ここでは、塗装ブース1でのみ塗装を行っている状態を示している。各塗装ブース1,3に対して一方側(図3中で左側)に乾燥室5,7を設けるとともに、塗装ブース1,3を間に挟んで乾燥室5,7と反対側に、排気室9,11を設ける。乾燥室5,7には、図示していないが、塗装後の被塗装部品Wを収納して電気ヒータにより乾燥させる。
【0012】
乾燥室5,7相互間は、隔壁6により仕切り、排気室9,11相互間は、隔壁10により仕切ってある。図示した実施の形態は、排気室9,11の塗装ブース1,3側は、その全域が開放しているが、塗装ブース1,3内の被塗装部品Wの大きさや形状に応じて、塗装ブース1,3内に発生させる層流の状態をコントロールすためめに仕切壁2などを設けてもよい。
【0013】
乾燥室5,7の塗装ブース1,3と反対側の外壁の下部側には気体取入口5a,7aを設け、気体取入口5a,7aには、多数の小孔を備えた多孔部材としてのステンレス製メッシュ(メッシュ130〜200位で、好ましくは150)15,17を設ける。上記した気体取入口5a,7aに対向して乾燥室5,7の塗装ブース1,3側の外壁には、気体取入口5a,7aから取り入れた気体(通常は空気)を塗装ブース1,3に導入する開口部19,21を設けてある。また、この開口部19,21は、乾燥室5,7に対する被塗装部品Wの出し入れを行う際にも利用する。
【0014】
一方、排気室9,11の図1中で右側端部近傍には、塗装ブース1,3に対向する側のほぼ全面にわたり、フィルタ23,25を設け、気流によって流れてくる塗料粒子の捕捉を行う。さらにこの排気室9,11におけるフィルタ23.,25より下流側(図1中で右側)の上面には、排気用ファン27,29を設けてある。この排気用ファン27,29を備えた上面についても、フィルタ31,33を設ける。
【0015】
また、乾燥室5,7の上面の図1,図2中で左側の端部にも、排気用ファン35,37を設けている。この排気用ファン35,37は、前記した排気室9,11側の排気用ファン27,29より小型で排気流量が小さいものとする。
【0016】
このように、排気室9,11側の排気用ファン27,29を大型化することで、乾燥室5,7の気体取入口5a,7aから外気の導入が可能となり、この導入した外気は、開口部19,21から塗装ブース1,3に流入し、排気室9,11に達する。排気室9,11に達した気体は、排気用ファン27,29によって外部に排出される。乾燥室5,7側の排気用ファン35,37は、乾燥室5,7内に熱を外部に排出する。
【0017】
塗装ブース1内には、前記した塗装ロボットRと、被塗装部品Wを支持する支持機構39と、被塗装部品Wと部品受け台41との間に気体を吹き付ける気体吹付手段としてのエアジェットノズル43とを、それぞれ配置してある。
【0018】
塗装ロボットRは、支持機構39より乾燥室5側に配置してあり、ロボットアーム先端のノズル45から塗料を噴出する。支持機構39は、基台47上に、回転支持アーム49が長手方向中心部を中心として回転可能に設けられ、この回転支持アーム49の両端部上に、前記した部品受け台41をそれぞれ設けてある。
【0019】
部品受け台41上には、ほぼH字形状の一対の部品支持手段としての部品支持脚53,55が立設してあり、この部品支持脚53,55上に被塗装部品Wをセットする。そして、回転支持アーム49が図4の状態にあるときに、図4中で奥側の被塗装部品Wに対して塗装作業を行う。
【0020】
塗装作業位置となる塗装ロボットRの塗装ブース1内の気流の上流側には、塗装ブース側壁から塗装ブース1の中央側に向けて突出する遮蔽板57を設けてある。この遮蔽板57は、先端が塗装ブース1内の気流の下流側に向けて屈曲し、塗装ロボットRを覆うような形状となっている。
【0021】
上記した遮蔽板57と排気室9との間の塗装ブース側部は、側方に突出する突出領域59を備え、この突出領域59の側壁59aには、多孔部材として前記したステンレス製メッシュ15,17と同様なステンレス製メッシュ61を設けてある。
【0022】
この遮蔽板57の気流上流側の塗装ブース側壁には、作業者が出入りする出入口部63を設けてある。この出入口部63には開閉ドア65を取り付けてあり、開閉ドア65には、前記したステンレス製メッシュ15,17と同様なステンレス製メッシュ67をその全面に設けてある。
【0023】
一方、塗装ブース3側の塗装ブース側壁は、塗装ブース1の側壁と同様に、前記したステンレス製メッシュ15,17と同様なステンレス製メッシュ69で構成してある。
【0024】
前記したエアジェットノズル43は、図2に示すように塗装ロボットRに対し、排気室9寄りでかつ突出領域59寄りの位置に配置してあり、図1に示すように上下方向に延びる支持ロッド71の上部に設けた支持アーム73に吊り下げて固定してある。このエアジェットノズル43は、上下方向高さが被塗装部品Wとほぼ同じ位置にあり、その先端の気体吹出口43aは、上部から下方に向けかつ被塗装部品Wと部品受け台41との間に向けて気体を吹き付けるよう設定してある。
【0025】
前記したエアジェットノズル43は、気体吹出口43aが、吹出口先端側に向けて通路断面積が順次小さく、かつ扁平状に形成してある。また、このエアジェットノズル43に気体を供給すべく接続してある配管75の途中には、この配管75を流れる気体中の油分などの異物を除去するフィルタ77を設けてある。
【0026】
次に、作用を説明する。
【0027】
排気室9,11側の排気用ファン35,37を作動させることで、装置外部の気体を気体取入口5a,7aから乾燥室5,7に導入し、さらに開口部19,21から塗装ブース1,3に流入させて、排気室9,11に導く。排気室9,11に達した気体は、排気用ファン27,29によって、塗料に含まれる揮発ガス成分とともに、塗装装置の外部に排出される。一方乾燥室5,7側の排気用ファン35,37の作動により、乾燥室5,7内の熱を外部に排出する。
【0028】
また、突出領域59におけるステンレス製メッシュ61、開閉ドア65におけるステンレス製メッシュ67および、これらと反対側の塗装ブース側壁のステンレス製メッシュ69からも、外気が塗装ブース1,3内にそれぞれ導入される。このように、塗装ブース1,3内への外気取入口に、ステンレス製メッシュ15,17,61,67,69を設けることで、塗装ブース1,3内での気体の流れが、均一な層流状態となるとともに、外部の塵埃の塗装ブース1,3内への浸入を防止できる。
【0029】
この状態で、回転支持アーム49上の一方の被塗装部品Wが、図4に示す奥側にあるときに、塗装ロボットRのノズル45から塗料を噴出させて、被塗装部品Wの表面全域に塗装作業を行う。これと同時に、エアジェットノズル43から、被塗装部品Wと部品受け台41との間に向けて、塗装ブース1,3内の層流とは別に気体を吹き付ける。
【0030】
上記したように、気流が層流状態となる中で塗装作業を行うことで、塗装ブース1,3内に浮遊する塵埃が滞留することなく下流に流され、またノズル45から噴出して被塗装部品Wに付着しなかった塗料粒子についても、層流状態の気流に沿って下流に流され、これにより被塗装部品Wへの塵埃の付着および飛散した塗料粒子の再付着を防止することができる。
【0031】
そして、エアジェットノズル43により、被塗装部品Wと部品受け台41との間に向け、かつ上部から下方に向けて気体を吹き付けることで、飛散した塗料粒子が下方に落下しても、この落下した塗料は、この吹き付けた気体によって下流側に流され、被塗装部品Wへの付着を防止でき、塗装状態の悪化を防止することができる。下流側に流された塗料粒子は、フィルタ23,25によって捕捉される。
【0032】
このとき、エアジェットノズル43は、ステンレス製メッシュ61から導入する気体の流れとほぼ平行に気体を噴出している。これにより、ステンレス製メッシュ61から導入する気体の流れの乱れを防止している。
【0033】
また、このエアジェットノズル43は、吹出口先端側に向けて通路断面積が順次小さく、かつ扁平状となった気体吹出口43aから気体を吹き出すので、吹き出される気体は、扁平状の層流となり、塗装ブース1,3内を流れる層流状態を大きく乱すことがない。また、このエアジェットノズル43の形態は、被塗装部品の大きさや形状に応じて、上記扁平状となる層流の幅、あるいはここの層流のサイズなどを複数設定して制御できるようにしてある。
【0034】
さらにこのエアジェットノズル43の配管75に設けたフィルタ77によって配管75を流れる気体中の異物を除去するので、塗装ブース1,3内への異物の吐出を防ぐことができる。特に、異物として油分を除去することで、この油分が被塗装部品に付着することによる塗料の付着性の悪化を防止することができる。
【0035】
また、塗装ロボットRの気流上流側に、遮蔽板57を設けることで、塗装ロボットRを設置することによる乱流発生を防止できる。そして、この遮蔽板57で遮蔽された塗装ロボットRの配置位置近傍の塗装ブース側壁の突出領域59にステンレス製メッシュ61を設け、ここから外気を取り入れることで、塗装ロボットR周辺における気体の流れを層流として維持することができる。
【0036】
なお、上記したステンレス製メッシュ61は、塗装ロボットRを配置した塗装作業位置が、突出領域59側の塗装ブース側壁に近いほど、ステンレス製メッシュ61の設置領域を大きくし、ステンレス製メッシュ61から流入する気体量を増大させることで、層流状態を確実に維持することができる。
【0037】
また、出入口部63の開閉ドア65にもステンレス製メッシュ67を設けたので、外気をより確実に塗装ブース1,3内に取り入れることができ、層流状態をより確実に発生させることができる。
【0038】
また、この塗装ブース1と隣接する塗装ブース3との間に仕切壁2を設けることで、塗装ブース1,3内の層流状態をさらに確実に維持することができる。
【0039】
なお、上記した実施形態において、塗装ブース3では、例えば作業者が手作業で被塗装部品に対して塗装作業を行ってもよい。この場合にも、エアジェットノズル43を設置して、落下する塗料粒子を吹き飛ばすことで、被塗装部品の塗装状態の悪化を防止することができる。
【0040】
また多孔部材としては、ステンレス製メッシュに限ることはなく、多数の小孔を備えたものであればよい。
【0041】
なお、本実施形態では、乾燥室、塗装ブース、排気室がそれぞれ2ライン並行に設置された塗装装置で説明したが、2ラインに限る必要はない。
【0042】
また、上記2ラインの内、塗装ブースの一方に突出領域59を設けているが、これも被塗装部品や塗装ブース内の大きさおよび塗装ブース内に設置した塗装ロボットの大きさやその稼働範囲の広さ、さらには支持機構39の大きさの関係によっては、必ずしも必要とせず、排気室9の側壁と塗装ブース1の側壁とが同一平面になっても構わない。
【図面の簡単な説明】
【図1】この発明の実施の一形態を示す塗装装置の内部構造の概略を示す側面図である。
【図2】図1の塗装装置の平面図である。
【図3】図1の塗装装置の全体構成を示す斜視図である。
【図4】被塗装部品に対して塗装ロボットにより塗装を行っている状態を示す斜視図である。
【符号の説明】
W 被塗装部品
1,3 塗装ブース
5,7 乾燥室
9,11 排気室
15,17,61,67,69 ステンレス製メッシュ(多孔部材)
41 部品受け台
43 エアジェットノズル(気体吹付手段)
53,55 部品支持脚(部品支持手段)
57 遮蔽板
75 配管
77 フィルタ
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a coating apparatus and a coating method for generating a laminar airflow in a coating booth and performing a coating operation on a part to be coated in the laminar flow.
[0002]
[Prior art]
As a conventional coating apparatus of this type, for example, an apparatus described in Patent Literature 1 is known.
[0003]
[Patent Document 1]
JP-A-11-179255
The invention described in this publication discloses that when outside air is taken in from one side of a painting booth performing a painting operation and the taken-in outside air is exhausted to the other side of the painting booth via the painting booth, air inside the painting booth is removed. Is made to be in a uniform laminar flow state. In this way, diffusion of contaminated air in the coating booth and stagnation are prevented.
[0005]
[Problems to be solved by the invention]
However, in the above-described conventional coating apparatus, since the coating operation is simply performed in a laminar flow state, the flow of air in the entire coating booth is laminar, but the vicinity of the part to be coated is small. In this case, there is a flow of paint sprayed toward the parts to be coated, separately from the flow of laminar flow in the booth. Then, the paint particles sprayed toward the part to be coated fall downward in the vicinity of the part to be coated, and the particles of the dropped paint jump up and adhere to the part to be coated. is there.
[0006]
In view of the above, an object of the present invention is to prevent the falling paint particles from rebounding to a part to be coated, thereby preventing the coating state from being deteriorated.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a coating apparatus for performing a coating operation on a part to be coated in a laminar state with an airflow in a coating booth, Further, gas spraying means for blowing gas separately from the laminar flow in the coating booth is provided.
[0008]
【The invention's effect】
According to this invention, in the vicinity of the part to be coated, the gas is blown separately from the laminar flow in the coating booth, so that even if the particles of the paint sprayed toward the part to be coated fall downward, The dropped paint particles are caused to flow downstream of the laminar airflow by the sprayed gas, so that the paint particles can be prevented from adhering to the parts to be coated and the coating state can be prevented from deteriorating.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
FIG. 1 is a side view schematically showing the internal structure of a coating apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a perspective view showing the overall configuration thereof, and FIG. FIG. 3 is a perspective view showing a state where a painting operation is being performed on a part W by a painting robot R.
[0011]
As shown in FIG. 3, the coating apparatus includes two coating booths 1 and 3 adjacent to each other. Here, a state where coating is performed only in the coating booth 1 is shown. Drying chambers 5 and 7 are provided on one side (left side in FIG. 3) for each of the coating booths 1 and 3, and an exhaust chamber is provided on the opposite side of the drying booths 5 and 7 with the coating booths 1 and 3 therebetween. 9 and 11 are provided. Although not shown, the parts to be coated W after coating are stored in the drying chambers 5 and 7, and are dried by an electric heater.
[0012]
The drying chambers 5 and 7 are separated from each other by a partition 6, and the exhaust chambers 9 and 11 are separated from each other by a partition 10. In the illustrated embodiment, the entire areas of the exhaust booths 9 and 11 on the side of the coating booths 1 and 3 are open. However, depending on the size and shape of the parts W to be coated in the coating booths 1 and 3, A partition wall 2 or the like may be provided to control the state of the laminar flow generated in the booths 1 and 3.
[0013]
Gas inlets 5a and 7a are provided on the lower side of the outer walls of the drying chambers 5 and 7 opposite to the coating booths 1 and 3, and the gas inlets 5a and 7a are formed as porous members having a large number of small holes. Stainless steel meshes (mesh 130 to 200, preferably 150) are provided. On the outer walls of the drying booths 5 and 7 on the side of the coating booths 1 and 3 facing the gas inlets 5a and 7a, the gas (usually air) introduced from the gas inlets 5a and 7a is coated. Are provided with openings 19 and 21 for introducing the liquid into the air. The openings 19 and 21 are also used when the parts W to be coated are put in and out of the drying chambers 5 and 7.
[0014]
On the other hand, near the right end of the exhaust chambers 9 and 11 in FIG. 1, filters 23 and 25 are provided over almost the entire surface opposite to the coating booths 1 and 3 to capture the paint particles flowing by the air flow. Do. Further, the filters 23. , 25, exhaust fans 27, 29 are provided on the upper surface on the downstream side (right side in FIG. 1). Filters 31, 33 are also provided on the upper surface provided with the exhaust fans 27, 29.
[0015]
Exhaust fans 35 and 37 are also provided at the left end in FIGS. 1 and 2 of the upper surfaces of the drying chambers 5 and 7. The exhaust fans 35 and 37 are smaller than the exhaust fans 27 and 29 on the exhaust chambers 9 and 11 side and have a smaller exhaust flow rate.
[0016]
As described above, by increasing the size of the exhaust fans 27 and 29 on the exhaust chambers 9 and 11 side, outside air can be introduced from the gas inlets 5 a and 7 a of the drying chambers 5 and 7. It flows into the coating booths 1 and 3 from the openings 19 and 21 and reaches the exhaust chambers 9 and 11. The gas that has reached the exhaust chambers 9 and 11 is exhausted to the outside by the exhaust fans 27 and 29. The exhaust fans 35 and 37 on the drying chambers 5 and 7 discharge heat into the drying chambers 5 and 7 to the outside.
[0017]
Inside the coating booth 1, the above-mentioned coating robot R, a support mechanism 39 for supporting the component W to be coated, and an air jet nozzle as a gas blowing means for blowing gas between the component W and the component receiving base 41 43 are arranged respectively.
[0018]
The coating robot R is disposed closer to the drying chamber 5 than the support mechanism 39, and sprays paint from a nozzle 45 at the end of the robot arm. In the support mechanism 39, a rotation support arm 49 is provided on a base 47 so as to be rotatable about a center in the longitudinal direction. On the both ends of the rotation support arm 49, the aforementioned component receiving tables 41 are provided. is there.
[0019]
On the component receiving base 41, component supporting legs 53 and 55 as a pair of substantially H-shaped component supporting means are erected, and the component W to be coated is set on the component supporting legs 53 and 55. Then, when the rotation support arm 49 is in the state shown in FIG. 4, the painting work is performed on the part W to be painted on the far side in FIG.
[0020]
On the upstream side of the airflow in the painting booth 1 of the painting robot R, which is the painting work position, a shielding plate 57 is provided that protrudes from the side wall of the painting booth toward the center of the painting booth 1. The shielding plate 57 has such a shape that its tip is bent toward the downstream side of the airflow in the coating booth 1 and covers the coating robot R.
[0021]
The side of the coating booth between the shielding plate 57 and the exhaust chamber 9 has a protruding region 59 that protrudes laterally, and the side wall 59a of the protruding region 59 has the stainless steel mesh 15 as a porous member. A stainless steel mesh 61 similar to 17 is provided.
[0022]
An entrance 63 through which an operator enters and exits is provided on the side wall of the coating booth upstream of the shield plate 57 in the airflow. An opening / closing door 65 is attached to the entrance / exit portion 63. The opening / closing door 65 is provided with a stainless steel mesh 67 similar to the stainless steel meshes 15 and 17 on the entire surface.
[0023]
On the other hand, the side wall of the coating booth on the side of the coating booth 3 is formed of a stainless steel mesh 69 similar to the stainless steel meshes 15 and 17 described above, similarly to the side wall of the coating booth 1.
[0024]
The above-mentioned air jet nozzle 43 is disposed at a position closer to the exhaust chamber 9 and closer to the protruding region 59 with respect to the coating robot R as shown in FIG. 2, and extends vertically as shown in FIG. It is hung and fixed to a support arm 73 provided on the upper part of 71. The air jet nozzle 43 has a height in the vertical direction substantially at the same position as the component W to be coated, and a gas outlet 43a at the tip thereof is directed downward from above and between the component W to be coated and the component receiving base 41. It is set to blow gas toward.
[0025]
In the above-described air jet nozzle 43, the gas outlet 43a is formed so that the cross-sectional area of the passage is gradually reduced toward the tip of the outlet and is flat. In the middle of a pipe 75 connected to supply air to the air jet nozzle 43, a filter 77 for removing foreign matters such as oil in the gas flowing through the pipe 75 is provided.
[0026]
Next, the operation will be described.
[0027]
By operating the exhaust fans 35 and 37 on the exhaust chambers 9 and 11 side, gas outside the apparatus is introduced into the drying chambers 5 and 7 from the gas inlets 5a and 7a, and further from the openings 19 and 21 to the coating booth 1. , 3 to the exhaust chambers 9, 11. The gas that has reached the exhaust chambers 9 and 11 is exhausted by the exhaust fans 27 and 29 to the outside of the coating apparatus together with the volatile gas components contained in the paint. On the other hand, the heat in the drying chambers 5 and 7 is discharged to the outside by the operation of the exhaust fans 35 and 37 on the drying chambers 5 and 7 side.
[0028]
Outside air is also introduced into the coating booths 1 and 3 from the stainless steel mesh 61 in the protruding region 59, the stainless steel mesh 67 in the opening / closing door 65, and the stainless steel mesh 69 on the side of the coating booth opposite to these. . In this way, by providing the stainless steel meshes 15, 17, 61, 67, 69 at the outside air intake into the coating booths 1, 3, the flow of gas in the coating booths 1, 3 is uniform. In addition to the flowing state, it is possible to prevent external dust from entering the coating booths 1 and 3.
[0029]
In this state, when one of the parts W to be coated on the rotary support arm 49 is on the back side shown in FIG. 4, the paint is ejected from the nozzle 45 of the coating robot R to cover the entire surface of the part W to be coated. Perform painting work. At the same time, a gas is sprayed from the air jet nozzle 43 toward the space between the component W to be coated and the component receiving table 41, separately from the laminar flow in the coating booths 1 and 3.
[0030]
As described above, by performing the coating work in a laminar air flow, the dust floating in the coating booths 1 and 3 flows downstream without stagnation, and is ejected from the nozzle 45 to be coated. The paint particles that have not adhered to the component W are also caused to flow downstream along the laminar airflow, thereby preventing dust from adhering to the workpiece W and reattachment of the scattered paint particles. .
[0031]
The air jet nozzle 43 blows a gas between the component W to be coated and the component receiving base 41 and downward from above, so that even if the scattered paint particles fall down, The sprayed paint is caused to flow downstream by the sprayed gas, so that the paint can be prevented from adhering to the parts W to be coated, and the coating state can be prevented from deteriorating. The paint particles flowing downstream are captured by the filters 23 and 25.
[0032]
At this time, the air jet nozzle 43 jets the gas substantially parallel to the flow of the gas introduced from the stainless steel mesh 61. This prevents the flow of the gas introduced from the stainless steel mesh 61 from being disturbed.
[0033]
Further, since the air jet nozzle 43 blows out gas from the gas outlet 43a, which has a passage cross-sectional area that is gradually reduced toward the tip end of the outlet and becomes flat, the gas to be blown out has a flat laminar flow. Thus, the state of laminar flow flowing through the coating booths 1 and 3 is not greatly disturbed. Further, the form of the air jet nozzle 43 can be controlled by setting a plurality of the width of the flat laminar flow or the size of the laminar flow here according to the size and shape of the part to be coated. is there.
[0034]
Further, since foreign matter in the gas flowing through the pipe 75 is removed by the filter 77 provided in the pipe 75 of the air jet nozzle 43, discharge of the foreign matter into the coating booths 1 and 3 can be prevented. In particular, by removing the oil as a foreign substance, it is possible to prevent the adhesion of the paint from being deteriorated due to the adhesion of the oil to a part to be coated.
[0035]
In addition, by providing the shielding plate 57 on the upstream side of the airflow of the coating robot R, it is possible to prevent turbulence due to the installation of the coating robot R. Then, a stainless steel mesh 61 is provided in the projecting region 59 of the side wall of the coating booth near the position where the coating robot R is shielded by the shielding plate 57, and the outside air is taken in from the mesh 61 to reduce the flow of gas around the coating robot R. It can be maintained as a laminar flow.
[0036]
In addition, the stainless steel mesh 61 increases the installation area of the stainless steel mesh 61 as the coating work position where the coating robot R is disposed is closer to the side of the coating booth on the protruding area 59 side, and flows in from the stainless steel mesh 61. By increasing the amount of gas generated, a laminar flow state can be reliably maintained.
[0037]
Further, since the stainless steel mesh 67 is also provided on the opening / closing door 65 of the entrance / exit portion 63, the outside air can be more reliably taken into the coating booths 1 and 3, and the laminar flow state can be more reliably generated.
[0038]
In addition, by providing the partition wall 2 between the coating booth 1 and the adjacent coating booth 3, the laminar flow state in the coating booths 1 and 3 can be more reliably maintained.
[0039]
In the above-described embodiment, in the painting booth 3, for example, a worker may manually perform a painting operation on a part to be painted. Also in this case, by installing the air jet nozzle 43 and blowing off falling paint particles, it is possible to prevent deterioration of the coating state of the part to be coated.
[0040]
The porous member is not limited to a stainless steel mesh, but may be any member provided with a large number of small holes.
[0041]
In the present embodiment, the drying apparatus, the coating booth, and the exhaust chamber are each described as a coating apparatus in which two lines are installed in parallel. However, the number of lines is not limited to two.
[0042]
Also, of the two lines, a protruding area 59 is provided on one of the coating booths. This also indicates the size of the parts to be coated, the size of the coating booth, the size of the coating robot installed in the coating booth, and the operating range thereof. Depending on the size of the support mechanism 39 and the size of the support mechanism 39, it is not always necessary, and the side wall of the exhaust chamber 9 and the side wall of the coating booth 1 may be on the same plane.
[Brief description of the drawings]
FIG. 1 is a side view schematically showing an internal structure of a coating apparatus according to an embodiment of the present invention.
FIG. 2 is a plan view of the coating apparatus of FIG.
FIG. 3 is a perspective view showing the overall configuration of the coating apparatus of FIG.
FIG. 4 is a perspective view showing a state in which a painting robot is painting a part to be painted.
[Explanation of symbols]
W Parts to be coated 1,3 Painting booth 5,7 Drying chamber 9,11 Exhaust chamber 15,17,61,67,69 Stainless steel mesh (porous member)
41 Parts receiving base 43 Air jet nozzle (gas blowing means)
53, 55 Component support legs (component support means)
57 Shielding plate 75 Piping 77 Filter

Claims (8)

塗装ブース内の気流を層流状態とし、この層流状態の中で被塗装部品に対して塗装作業を行う塗装装置において、前記被塗装部品の近傍に、前記塗装ブース内の層流とは別に気体を吹き付ける気体吹付手段を設けたことを特徴とする塗装装置。In the coating apparatus which performs the coating work on the parts to be coated in the laminar state with the airflow in the coating booth, in the vicinity of the parts to be coated, separately from the laminar flow in the coating booth. A coating apparatus comprising a gas blowing means for blowing gas. 前記被塗装部品を部品受け台から離間した状態で支持する部品支持手段を設け、前記気体吹付手段は、前記被塗装部品と前記部品受け台との間に気体を吹き付けることを特徴とする請求項1記載の塗装装置。A component supporting means for supporting the component to be coated in a state separated from a component receiving table, wherein the gas blowing means blows gas between the component to be coated and the component receiving table. The coating apparatus according to 1. 前記気体吹付手段は、前記層流状態の気流の上流側から同下流側に向けて気体を吹き付けることを特徴とする請求項1または2記載の塗装装置。3. The coating apparatus according to claim 1, wherein the gas blowing unit blows the gas from an upstream side of the laminar airflow to a downstream side thereof. 4. 前記気体吹付手段に気体を供給する配管途中に、気体中の異物を除去するフィルタを設けたことを特徴とする請求項1ないし3のいずれかに記載の塗装装置。The coating apparatus according to any one of claims 1 to 3, wherein a filter for removing foreign substances in the gas is provided in a pipe for supplying the gas to the gas blowing means. 前記気体吹付手段の気体吹出口を、吹出口先端側に向けて通路断面積が順次小さく、かつ扁平状に形成したことを特徴とする請求項1ないし4のいずれかに記載の塗装装置。The coating apparatus according to any one of claims 1 to 4, wherein a gas outlet of the gas blowing means is formed in a flat shape with a passage cross-sectional area gradually decreasing toward the tip of the outlet. 前記塗装作業位置に対して前記気流の上流側に、前記塗装ブースの側壁から塗装ブース中央側に向けて突出し、その先端側が前記気流の下流側に向けて屈曲する遮蔽板を設け、前記塗装作業位置近傍の塗装ブース側壁に、装置外部より気体を取り入れる多孔部材を設けたことを特徴とする請求項1ないし5のいずれかに記載の塗装装置。On the upstream side of the airflow with respect to the coating operation position, a shielding plate that protrudes from the side wall of the coating booth toward the center of the coating booth and has a distal end bent toward the downstream side of the airflow is provided. The coating apparatus according to any one of claims 1 to 5, wherein a porous member for taking in gas from outside of the apparatus is provided on a side wall of the coating booth near the position. 前記気体吹付手段は、前記多孔部材から導入した気体に沿って気体を吹き付けることを特徴とする請求項6記載の塗装装置。The coating apparatus according to claim 6, wherein the gas blowing unit blows the gas along the gas introduced from the porous member. 塗装ブースに対して一方側から多孔部材を通して塗装ブース外から気体を導入するとともに、前記塗装ブースの他方側から前記導入した気体を外部に排出して、前記塗装ブース内の気流を層流状態とし、この層流状態の中で被塗装部品に対して塗装作業を行う塗装方法において、前記被塗装部品を部品受け台から離間して配置し、前記被塗装部品と前記部品受け台との間に気体を吹き付けて、前記気流の下流側に向けて塗料粒子を吹き飛ばすことを特徴とする塗装方法。A gas is introduced from the outside of the painting booth through the porous member from one side to the painting booth, and the introduced gas is discharged to the outside from the other side of the painting booth to change the airflow in the painting booth into a laminar flow state. In a coating method of performing a coating operation on a part to be coated in this laminar flow state, the part to be coated is arranged at a distance from a part receiving pedestal, and between the part to be coated and the part receiving pedestal. A coating method, comprising blowing a gas to blow off paint particles toward a downstream side of the air flow.
JP2002320134A 2002-11-01 2002-11-01 Coating apparatus and coating method Expired - Fee Related JP3971986B2 (en)

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