JP2015157995A - Electrodeposition coating apparatus, and electrodeposition coating method - Google Patents

Electrodeposition coating apparatus, and electrodeposition coating method Download PDF

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JP2015157995A
JP2015157995A JP2014034250A JP2014034250A JP2015157995A JP 2015157995 A JP2015157995 A JP 2015157995A JP 2014034250 A JP2014034250 A JP 2014034250A JP 2014034250 A JP2014034250 A JP 2014034250A JP 2015157995 A JP2015157995 A JP 2015157995A
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electrodeposition
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vehicle body
voltage
electrodeposition region
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JP6135547B2 (en
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裕 小塚
Yutaka Kozuka
裕 小塚
拓 金澤
Taku Kanazawa
拓 金澤
悠希 飯田
Yuki Iida
悠希 飯田
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Toyota Motor Corp
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Toyota Motor Corp
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Abstract

PROBLEM TO BE SOLVED: To provide an electrodeposition coating apparatus and method capable of solving the problem of temporary reduction of a voltage applied to a vehicle body to ensure the thickness of a rocker part of the vehicle body.SOLUTION: An electrodeposition coating apparatus 100 having a first electrodeposition region R1 in which an electrodeposition tank 10 performs electrodeposition coating on to a vehicle body W by setting an applied voltage of electrodes 31, 32 at a first voltage V1, and a second electrodeposition region R2 for performing electrodeposition coating by setting an applied voltage of the electrodes 31, 32 at a second voltage V2 further has an intermediate electrodeposition region Rm disposed with a bottom part electrode 32 between the first electrodeposition region R1 and the second electrodeposition region R2, where the applied voltage of the electrodes 31, 32 disposed in the first electrodeposition region R1 and the intermediate electrodeposition region Rm is controlled at the first voltage V1 until the vehicle body W enters the second electrodeposition region R2 after entering the intermediate electrodeposition region Rm, and the applied voltage of the electrodes 31, 32 disposed in the intermediate electrodeposition region Rm and the second electrodeposition region R2 is controlled at the second voltage V2 until the vehicle body W exits from the intermediate electrodeposition region Rm after entering the second electrodeposition region R2.

Description

本発明は、電着塗装装置及び電着塗装方法の技術に関する。   The present invention relates to a technique of an electrodeposition coating apparatus and an electrodeposition coating method.

電着塗装は、塗料と被塗装物とに異極性の静電気を帯電させ、水性塗料中に被塗装物を浸漬させて塗装する方法として公知である。例えば、自動車工場では、自動車の車体の塗装に電着塗装が用いられている。   Electrodeposition coating is known as a method in which a coating material and an object to be coated are charged with static electricity of different polarities, and the object to be coated is immersed in an aqueous coating material. For example, in an automobile factory, electrodeposition coating is used for painting a car body.

従来、車体の電着塗装では、車体の下部におけるロッカー部（特に、袋構造部の内板面）の膜厚不足が課題となっていた。そこで、車体の電着塗装では、電着槽の底部に電極を配置する等の試みがなされている（例えば、特許文献１）。   Conventionally, in the electrodeposition coating of a vehicle body, there has been a problem of insufficient film thickness of the rocker portion (particularly the inner plate surface of the bag structure portion) at the lower portion of the vehicle body. Therefore, in the electrodeposition coating of the vehicle body, attempts have been made to arrange electrodes at the bottom of the electrodeposition tank (for example, Patent Document 1).

また、車体のロッカー部の膜厚不足を解決すべく、車体の電着塗装では、印加電圧を電着塗装装置全体で上昇させることが試みられている。しかし、電着塗装装置全体で印加電圧を上昇させた場合、ロッカー部の膜厚を上昇させることができるが、ドア、フェンダー等の外板部分も膜厚が厚くなり、車体全体としては膜厚差が生じることになる。   In addition, in order to solve the film thickness shortage of the rocker portion of the vehicle body, in the electrodeposition coating of the vehicle body, an attempt is made to increase the applied voltage in the entire electrodeposition coating apparatus. However, when the applied voltage is increased in the entire electrodeposition coating apparatus, the film thickness of the rocker can be increased, but the outer plate parts such as doors and fenders also become thicker, and the film thickness as a whole vehicle body There will be a difference.

さらに、車体のロッカー部の膜厚不足を解決すべく、車体の部位毎に印加電圧を個別制御することが試みられている。しかし、車体の部位毎に印加電圧を個別制御した場合、電極間に電圧差が生じることによって、本来車体にかかるべき電圧が低電圧設定の電極に印加されてしまう不具合が生じる。また、電極間に生じる電圧差による塗膜欠陥等の表面品質の不具合も多く発生することになる。   Furthermore, in order to solve the film thickness shortage of the rocker portion of the vehicle body, it has been attempted to individually control the applied voltage for each part of the vehicle body. However, when the applied voltage is individually controlled for each part of the vehicle body, a voltage difference is generated between the electrodes, so that a voltage that should originally be applied to the vehicle body is applied to the low voltage setting electrode. Also, many surface quality defects such as coating film defects due to the voltage difference generated between the electrodes occur.

また、従来、車体の電着塗装では、車体の表面品質向上のため、第一段階で車体に低電圧を印加し、第二段階で車体に高電圧を印加するといったように、電圧を二段階に分けて印加する方法で塗装することも行われている。このとき、第一段階と第二段階の間では、それぞれの印加電圧が干渉しないように、それぞれの段階の電極間で距離を設けている。   Conventionally, in the electrodeposition coating of the vehicle body, in order to improve the surface quality of the vehicle body, a low voltage is applied to the vehicle body in the first stage and a high voltage is applied to the vehicle body in the second stage. Painting is also performed by applying the method separately. At this time, a distance is provided between the electrodes in each stage so that the applied voltages do not interfere with each other between the first stage and the second stage.

このような二段階で車体に電圧を印加する電着塗装では、第一段階と第二段階との間の電圧を切り替えるタイミングにて車体がそれぞれの電極から遠ざかるため、車体に印加される電圧が一時的に低下する状態が発生する。   In electrodeposition coating in which voltage is applied to the vehicle body in such two stages, the vehicle body moves away from the respective electrodes at the timing of switching the voltage between the first stage and the second stage. A temporary drop condition occurs.

特開２００９−１８５３０９号公報JP 2009-185309 A

本発明の解決しようとする課題は、車体に印加される電圧の一時的な低下を解消し、車体のロッカー部の膜厚を確保することができる電着塗装装置及び電着塗装方法を提供することである。   The problem to be solved by the present invention is to provide an electrodeposition coating apparatus and an electrodeposition coating method capable of eliminating a temporary decrease in the voltage applied to the vehicle body and ensuring the film thickness of the rocker portion of the vehicle body. That is.

本発明の解決しようとする課題は以上の如くであり、次にこの課題を解決するための手段を説明する。   The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

即ち、請求項１においては、塗料成分が貯溜され、搬送される車体を前記塗料成分に浸漬させた状態で、前記車体に対する電着塗装が行われる電着槽と、前記電着層に配置され、前記車体に対して電圧を印加する複数の電極と、前記電極への印加電圧を制御する制御手段を備え、前記電着層は、前記電極からの印加電圧を第一電圧に設定して、前記車体に対する電着塗装を行う第一電着領域、及び前記第一電着領域よりも下流側に位置し、前記電極からの印加電圧を前記第一電圧よりも高い第二電圧に設定して、前記車体に対する電着塗装を行う第二電着領域を有する電着塗装装置であって、前記電着層における前記第一電着領域と前記第二電着領域との間に、前記電着層の底部に電極が配置される中間電着領域を有し、前記制御手段は、前記車体が前記中間電着領域に進入した後、前記第二電着領域に進入するまでの間は、前記第一電着領域及び中間電着領域に配置される電極の印加電圧を前記第一電圧に制御し、前記車体が前記第二電着領域に進入した後、前記中間電着領域から抜け出るまでの間は、前記中間電着領域及び第二電着領域に配置される電極の印加電圧を前記第二電圧に制御するものである。   That is, according to the first aspect of the present invention, the paint component is stored and the electrodeposition tank in which the electrodeposition coating is performed on the vehicle body in a state where the vehicle body to be conveyed is immersed in the paint component, and the electrodeposition layer are disposed. A plurality of electrodes for applying a voltage to the vehicle body, and a control means for controlling the voltage applied to the electrodes, wherein the electrodeposition layer sets the voltage applied from the electrodes to a first voltage, A first electrodeposition region for performing electrodeposition coating on the vehicle body, and a downstream side of the first electrodeposition region, and an applied voltage from the electrode is set to a second voltage higher than the first voltage. An electrodeposition coating apparatus having a second electrodeposition region for performing electrodeposition coating on the vehicle body, wherein the electrodeposition is performed between the first electrodeposition region and the second electrodeposition region in the electrodeposition layer. Having an intermediate electrodeposition region in which electrodes are arranged at the bottom of the layer, the control means comprising: After the vehicle body enters the intermediate electrodeposition region, the voltage applied to the electrodes disposed in the first electrodeposition region and the intermediate electrodeposition region is the first voltage until the vehicle body enters the second electrodeposition region. After the vehicle body enters the second electrodeposition region, the voltage applied to the electrodes disposed in the intermediate electrodeposition region and the second electrodeposition region is changed until the vehicle body exits from the intermediate electrodeposition region. The second voltage is controlled.

請求項２においては、塗料成分が貯溜され、搬送される車体を前記塗料成分に浸漬させた状態で、前記車体に対する電着塗装が行われる電着槽と、前記電着層に配置され、前記車体に対して電圧を印加する複数の電極と、前記電極への印加電圧を制御する制御手段を備え、前記電着層は、前記電極からの印加電圧を第一電圧に設定して、前記車体に対する電着塗装を行う第一電着領域、及び前記第一電着領域よりも下流側に位置し、前記電極からの印加電圧を前記第一電圧よりも高い第二電圧に設定して、前記車体に対する電着塗装を行う第二電着領域を有する電着塗装装置を用いた電着塗装方法であって、前記電着層における前記第一電着領域と前記第二電着領域との間に、前記電着層の底部に電極を配置した中間電着領域を設け、前記制御手段により、前記車体が前記中間電着領域に進入した後、前記第二電着領域に進入するまでの間は、前記第一電着領域及び中間電着領域に配置される電極の印加電圧を前記第一電圧に制御し、前記車体が前記第二電着領域に進入した後、前記中間電着領域から抜け出るまでの間は、前記中間電着領域及び第二電着領域に配置される電極の印加電圧を前記第二電圧に制御するものである。   In claim 2, the paint component is stored and disposed in the electrodeposition layer, an electrodeposition tank in which electrodeposition coating is performed on the vehicle body, with the vehicle body being transported immersed in the paint component, A plurality of electrodes for applying a voltage to the vehicle body, and a control means for controlling the voltage applied to the electrode, wherein the electrodeposition layer sets the voltage applied from the electrode to a first voltage, and the vehicle body A first electrodeposition region for performing electrodeposition coating, and located on the downstream side of the first electrodeposition region, the applied voltage from the electrode is set to a second voltage higher than the first voltage, An electrodeposition coating method using an electrodeposition coating apparatus having a second electrodeposition region for performing electrodeposition coating on a vehicle body, wherein the electrodeposition layer is provided between the first electrodeposition region and the second electrodeposition region. The electrodeposition layer is provided with an intermediate electrodeposition region in which an electrode is disposed at the bottom, and the control is performed. After the vehicle body enters the intermediate electrodeposition region, the voltage applied to the electrodes arranged in the first electrodeposition region and the intermediate electrodeposition region is changed until the vehicle body enters the second electrodeposition region. The electrodes arranged in the intermediate electrodeposition region and the second electrodeposition region until the vehicle body enters the second electrodeposition region and then exits from the intermediate electrodeposition region after controlling the first voltage. The applied voltage is controlled to the second voltage.

本発明の電着塗装装置及び電着塗装方法によれば、車体に印加される電圧の一時的な低下を解消し、車体のロッカー部の膜厚を確保することができる。   According to the electrodeposition coating apparatus and the electrodeposition coating method of the present invention, it is possible to eliminate a temporary decrease in the voltage applied to the vehicle body and secure the film thickness of the rocker portion of the vehicle body.

電着塗装装置の構成を示した模式図。The schematic diagram which showed the structure of the electrodeposition coating apparatus. 電着塗装制御の流れを示した模式図。The schematic diagram which showed the flow of the electrodeposition coating control. 同じく模式図。Similarly schematic diagram.

図１を用いて、電着塗装装置１００の構成について説明する。
なお、図１では、電着塗装装置１００の構成を模式的に表している。また、図１の破線は、電気信号線を表している。なお、以下では、図１に示す搬送方向に従って説明するものとする。 The configuration of the electrodeposition coating apparatus 100 will be described with reference to FIG.
In addition, in FIG. 1, the structure of the electrodeposition coating apparatus 100 is represented typically. Moreover, the broken line of FIG. 1 represents the electric signal line. In the following, description will be made according to the conveyance direction shown in FIG.

電着塗装装置１００は、本発明の電着塗装装置に係る実施形態である。本実施形態の電着塗装装置１００は、電着塗装によって被塗装体である車体Ｗに電着塗装を施す装置である。電着塗装装置１００は、水性塗料と車体Ｗとに異極性の静電気を帯電させ、水性塗料中に車体Ｗを浸漬させることにより塗装を行う。   The electrodeposition coating apparatus 100 is an embodiment according to the electrodeposition coating apparatus of the present invention. The electrodeposition coating apparatus 100 according to this embodiment is an apparatus that performs electrodeposition coating on the vehicle body W that is the object to be coated by electrodeposition coating. The electrodeposition coating apparatus 100 performs coating by charging the water-based paint and the vehicle body W with static electricity of different polarities and immersing the vehicle body W in the water-based paint.

電着塗装装置１００は、電着槽１０と、搬送装置２０と、側面電極３１と、底部電極３２と、電圧印加装置４０と、制御手段としてのコントローラ５０と、を備えている。   The electrodeposition coating apparatus 100 includes an electrodeposition tank 10, a transfer device 20, a side electrode 31, a bottom electrode 32, a voltage application device 40, and a controller 50 as control means.

電着槽１０は、搬送される車体Ｗに対して電着塗装を行うための槽であり、内部に水性塗料が貯溜されている。電着槽１０においては、車体Ｗを水性塗料中に浸漬させた状態で、車体Ｗに対する電着塗装が行われる。電着槽１０は、車体Ｗの搬送方向に沿って長く形成されている。   The electrodeposition tank 10 is a tank for performing electrodeposition coating on the transported vehicle body W, and a water-based paint is stored inside. In the electrodeposition tank 10, the electrodeposition coating is performed on the vehicle body W while the vehicle body W is immersed in the water-based paint. The electrodeposition tank 10 is formed long along the conveyance direction of the vehicle body W.

電着層１０は、車体Ｗに対する電着塗装を行う領域として、第一電着領域Ｒ１、第一電着領域Ｒ１よりも車体Ｗの搬送方向における下流側に位置する第二電着領域Ｒ２、及び第一電着領域Ｒ１と第二電着領域Ｒ２との間に位置する中間電着領域Ｒｍを有している。   The electrodeposition layer 10 is a first electrodeposition region R1, a second electrodeposition region R2 located on the downstream side in the transport direction of the vehicle body W from the first electrodeposition region R1, And an intermediate electrodeposition region Rm located between the first electrodeposition region R1 and the second electrodeposition region R2.

搬送装置２０は、アース接続された車体Ｗを、電着槽１０の水性塗料中に浸漬させて搬送方向に搬送するものである。搬送装置２０は、コンベア２１と、ハンガー２２と、を備えている。   The conveying device 20 is configured to immerse the vehicle body W connected to the ground in the water-based paint of the electrodeposition tank 10 and convey it in the conveying direction. The transport device 20 includes a conveyor 21 and a hanger 22.

コンベア２１は、電着槽１０の上方にて搬送方向に沿って架設されている。コンベア２１には、車体Ｗをアース接続するためのアース用給電バー（図示略）が配置されている。   The conveyor 21 is installed above the electrodeposition tank 10 along the conveyance direction. The conveyor 21 is provided with a grounding power supply bar (not shown) for grounding the vehicle body W.

ハンガー２２は、車体Ｗを支持し、コンベア２１によって搬送されるものである。ハンガー２２では、車体Ｗを支持した際には、車体Ｗとコンベア２１のアース用給電バーとが電気的に接続されるように構成されている。   The hanger 22 supports the vehicle body W and is conveyed by the conveyor 21. The hanger 22 is configured such that when the vehicle body W is supported, the vehicle body W and the grounding power supply bar of the conveyor 21 are electrically connected.

側面電極３１は、電着槽１０内の水性塗料中に浸漬された状態で、電着槽１０の側部に沿って設置されており、電着槽１０内を搬送される車体Ｗが設置箇所を通過する際に、車体Ｗの側面に対向する電極である。それぞれの側面電極３１は、電圧印加装置４０に接続されている。   The side electrode 31 is installed along the side of the electrodeposition tank 10 while being immersed in the aqueous coating material in the electrodeposition tank 10, and the vehicle body W transported in the electrodeposition tank 10 is installed at the location where This is an electrode that faces the side surface of the vehicle body W when passing through. Each side electrode 31 is connected to a voltage application device 40.

底部電極３２は、電着槽１０内の水性塗料中に浸漬された状態で、電着槽１０の底部に沿って設置されており、電着槽１０内を搬送される車体Ｗが設置箇所を通過する際に、車体Ｗの底部に対向する電極である。それぞれの側面電極３１は、電圧印加装置４０に接続されている。   The bottom electrode 32 is installed along the bottom of the electrodeposition tank 10 in a state of being immersed in the aqueous paint in the electrodeposition tank 10, and the vehicle body W transported in the electrodeposition tank 10 has an installation location. The electrode is opposed to the bottom of the vehicle body W when passing. Each side electrode 31 is connected to a voltage application device 40.

第一電着領域Ｒ１は、車体Ｗが搬送装置２０によって電着槽１０内を搬送される際に、最初に通過する電着領域である。第一電着領域Ｒ１には、複数の側面電極３１と、底部電極３２と、が配置されている。第一電着領域Ｒ１に配置される複数の側面電極３１及び底部電極３２には、電圧印加装置４０によって第一電圧Ｖ１が印加されるように構成されている。   The first electrodeposition region R <b> 1 is an electrodeposition region that first passes when the vehicle body W is transported through the electrodeposition tank 10 by the transport device 20. A plurality of side electrodes 31 and a bottom electrode 32 are arranged in the first electrodeposition region R1. The plurality of side surface electrodes 31 and the bottom electrode 32 arranged in the first electrodeposition region R <b> 1 are configured so that the first voltage V <b> 1 is applied by the voltage application device 40.

つまり、第一電着領域Ｒ１は、側面電極３１及び底部電極３２からの車体Ｗに対する印加電圧を第一電圧Ｖ１に設定して、電着塗装を行う領域である。   That is, the first electrodeposition region R1 is a region where electrodeposition coating is performed by setting the voltage applied to the vehicle body W from the side electrode 31 and the bottom electrode 32 to the first voltage V1.

第二電着領域Ｒ２は、搬送装置２０によって電着槽１０内を搬送される車体Ｗが、第一電着領域Ｒ１を通過した後に、通過する電着領域である。第二電着領域Ｒ２には、複数の側面電極３１と、複数の底部電極３２と、が配置されている。第二電着領域Ｒ２に配置される複数の側面電極３１及び底部電極３２には、電圧印加装置４０によって第二電圧Ｖ２が印加されるように構成されている。   The second electrodeposition region R2 is an electrodeposition region through which the vehicle body W transported in the electrodeposition tank 10 by the transport device 20 passes after passing through the first electrodeposition region R1. A plurality of side electrodes 31 and a plurality of bottom electrodes 32 are disposed in the second electrodeposition region R2. The plurality of side surface electrodes 31 and the bottom electrode 32 arranged in the second electrodeposition region R2 are configured such that the second voltage V2 is applied by the voltage application device 40.

つまり、第二電着領域Ｒ２は、側面電極３１及び底部電極３２からの車体Ｗに対する印加電圧を第二電圧Ｖ２に設定して、電着塗装を行う領域である。   That is, the second electrodeposition region R2 is a region where the applied voltage to the vehicle body W from the side electrode 31 and the bottom electrode 32 is set to the second voltage V2 to perform electrodeposition coating.

第二電圧Ｖ２は、第一電圧Ｖ１よりも高い電圧として設定されている。   The second voltage V2 is set as a voltage higher than the first voltage V1.

中間電着領域Ｒｍは、第一電着領域Ｒ１と第二電着領域Ｒ２との間に設けられ、第一電着領域Ｒ１を通過した車体Ｗが、第二電着領域Ｒ２へ到達する前に通過する電着領域である。中間電着領域Ｒｍには、底部電極３２のみが配置されている。中間電着領域Ｒｍに配置される底部電極３２には、電圧印加装置４０によって第一電圧Ｖ１又は第二電圧Ｖ２が印加されるように構成されている。   The intermediate electrodeposition region Rm is provided between the first electrodeposition region R1 and the second electrodeposition region R2, and before the vehicle body W that has passed through the first electrodeposition region R1 reaches the second electrodeposition region R2. This is the electrodeposition region passing through. Only the bottom electrode 32 is disposed in the intermediate electrodeposition region Rm. The first electrode V1 or the second voltage V2 is applied to the bottom electrode 32 disposed in the intermediate electrodeposition region Rm by the voltage applying device 40.

つまり、中間電着領域Ｒｍは、底部電極３２からの車体Ｗに対する印加電圧を第一電圧Ｖ１又は第二電圧Ｖ２に設定して、電着塗装を行う領域である。   That is, the intermediate electrodeposition region Rm is a region where the applied voltage from the bottom electrode 32 to the vehicle body W is set to the first voltage V1 or the second voltage V2 to perform electrodeposition coating.

電圧印加装置４０は、上述した側面電極３１及び底部電極３２に電圧を印加する装置である。電圧印加装置４０は、第一電源４１と、第二電源４２と、スイッチ４３・４４と、を備えている。   The voltage application device 40 is a device that applies a voltage to the side electrode 31 and the bottom electrode 32 described above. The voltage application device 40 includes a first power supply 41, a second power supply 42, and switches 43 and 44.

第一電源４１は、所定の第一電圧Ｖ１を印加するための電源である。第一電源４１の正極は、第一電着領域Ｒ１の側面電極３１及び底部電極３２に接続されるとともに、スイッチ４３を介して中間電着領域Ｒｍの底部電極３２に接続されている。第一電源４１の負極は、アースに接続されている。第一電源４１は、コントローラ５０に接続されている。   The first power supply 41 is a power supply for applying a predetermined first voltage V1. The positive electrode of the first power supply 41 is connected to the side electrode 31 and the bottom electrode 32 of the first electrodeposition region R1 and is connected to the bottom electrode 32 of the intermediate electrodeposition region Rm via the switch 43. The negative electrode of the first power supply 41 is connected to the ground. The first power supply 41 is connected to the controller 50.

第二電源４２は、所定の第二電圧Ｖ２を印加するための電源である。第二電源４２の正極は、第二電着領域Ｒ２の側面電極３１及び底部電極３２に接続されるとともに、スイッチ４４を介して中間電着領域Ｒｍの底部電極３２に接続されている。第二電源４２の負極は、アースに接続されている。第二電源４２は、コントローラ５０に接続されている。   The second power source 42 is a power source for applying a predetermined second voltage V2. The positive electrode of the second power source 42 is connected to the side electrode 31 and the bottom electrode 32 in the second electrodeposition region R2, and is connected to the bottom electrode 32 in the intermediate electrodeposition region Rm via the switch 44. The negative electrode of the second power source 42 is connected to the ground. The second power source 42 is connected to the controller 50.

スイッチ４３は、第一電源４１の正極と中間電着領域Ｒｍの底部電極３２との接続をＯＮ又はＯＦＦとするものである。スイッチ４４は、第二電源４２の正極と中間電着領域Ｒｍの底部電極３２との接続をＯＮ又はＯＦＦとするものである。スイッチ４３・４４は、それぞれコントローラ５０に接続されている。   The switch 43 turns on or off the connection between the positive electrode of the first power supply 41 and the bottom electrode 32 of the intermediate electrodeposition region Rm. The switch 44 turns on or off the connection between the positive electrode of the second power source 42 and the bottom electrode 32 of the intermediate electrodeposition region Rm. The switches 43 and 44 are connected to the controller 50, respectively.

コントローラ５０は、第一電源４１又は第二電源４２から側面電極３１又は底部電極３２への電圧の印加を制御するものである。   The controller 50 controls application of a voltage from the first power supply 41 or the second power supply 42 to the side electrode 31 or the bottom electrode 32.

また、コントローラ５０は、車体Ｗが搬送装置２０によって電着槽１０内を搬送される際に、車体Ｗの前端部又は後端部が第一電着領域Ｒ１、中間電着領域Ｒｍ及び第二電着領域Ｒ２に進入したことを、検知センサー（図示略）を介して検知する機能を有している。   Further, when the vehicle body W is transported in the electrodeposition tank 10 by the transport device 20, the controller 50 has the front end portion or the rear end portion of the vehicle body W as the first electrodeposition region R1, the intermediate electrodeposition region Rm, and the second electrodeposition region Rm. It has a function of detecting that it has entered the electrodeposition region R2 via a detection sensor (not shown).

このような構成とすることによって、搬送装置２０によって電着槽１０内を車体Ｗが搬送される際に、側面電極３１又は底部電極３２に電圧が印加され、電着槽１０内の水性塗料を介して車体Ｗを通って搬送装置２０のアース側に電流が流れる。このとき、側面電極３１又は底部電極３２によって帯電された（イオン化された）塗料成分が車体Ｗの表面に付着して、車体Ｗの表面が電着塗装される。   With such a configuration, when the vehicle body W is transported through the electrodeposition tank 10 by the transport device 20, a voltage is applied to the side electrode 31 or the bottom electrode 32, and the water-based paint in the electrodeposition tank 10 is removed. Current flows through the vehicle body W to the ground side of the transfer device 20. At this time, the paint component charged (ionized) by the side electrode 31 or the bottom electrode 32 adheres to the surface of the vehicle body W, and the surface of the vehicle body W is electrodeposited.

図２及び図３を用いて、電着塗装制御Ｓ１００の流れについて説明する。
なお、図２及び図３では、電着塗装制御Ｓ１００の流れを模式的に表している。また、図２及び図３では、太線で囲まれた電着領域が有効な電着領域として表されている。 The flow of the electrodeposition coating control S100 will be described with reference to FIGS.
2 and 3 schematically show the flow of the electrodeposition coating control S100. In FIGS. 2 and 3, the electrodeposition region surrounded by a thick line is represented as an effective electrodeposition region.

電着塗装制御Ｓ１００は、本発明の電着塗装方法に係る実施形態である。電着塗装制御Ｓ１００は、上述した電着塗装装置１００を用いて、電着塗装によって被塗装体である車体Ｗに電着塗装を施す制御である。   The electrodeposition coating control S100 is an embodiment according to the electrodeposition coating method of the present invention. The electrodeposition coating control S100 is control for applying electrodeposition coating to the vehicle body W, which is the object to be coated, by electrodeposition coating using the electrodeposition coating apparatus 100 described above.

ステップＳ１１０において、コントローラ５０は、第一電着領域Ｒ１の上流側から搬送されてきた車体Ｗの前端部が、第一電着領域Ｒ１に進入したことを検知すると、第一電源４１からの、第一電着領域Ｒ１の側面電極３１及び底部電極３２への給電を開始し、第一電着領域Ｒ１の側面電極３１及び底部電極３２に第一電圧Ｖ１を印加する。この場合、スイッチ４３及びスイッチ４４はＯＦＦされている。   In step S110, when the controller 50 detects that the front end portion of the vehicle body W conveyed from the upstream side of the first electrodeposition region R1 has entered the first electrodeposition region R1, the controller 50 receives the Power supply to the side electrode 31 and the bottom electrode 32 in the first electrodeposition region R1 is started, and the first voltage V1 is applied to the side electrode 31 and the bottom electrode 32 in the first electrodeposition region R1. In this case, the switch 43 and the switch 44 are OFF.

すなわち、ステップＳ１１０は、車体Ｗが第一電着領域Ｒ１に進入した後、中間電着領域Ｒｍに進入するまでの間に、第一電着領域Ｒ１において、第一電圧Ｖ１に設定された印加電圧にて、車体Ｗに対する電着塗装を行う工程である。   That is, in step S110, after the vehicle body W enters the first electrodeposition region R1, and before entering the intermediate electrodeposition region Rm, the application set at the first voltage V1 in the first electrodeposition region R1. This is a step of performing electrodeposition coating on the vehicle body W with a voltage.

ステップＳ１２０において、コントローラ５０は、搬送される車体Ｗの前端部が、中間電着領域Ｒｍに進入したことを検知すると、第一電源４１からの、第一電着領域Ｒ１の側面電極３１及び底部電極３２への給電が継続されるとともに、第一電源４１からの中間電着領域Ｒｍの底部電極３２への給電が開始され、第一電着領域Ｒ１の側面電極３１及び底部電極３２、並びに、中間電着領域Ｒｍの底部電極３２に第一電圧Ｖ１を印加する。この際、スイッチ４３はＯＮされ、スイッチ４４はＯＦＦされている。   In step S120, when the controller 50 detects that the front end portion of the transported vehicle body W has entered the intermediate electrodeposition region Rm, the side electrode 31 and the bottom portion of the first electrodeposition region R1 from the first power source 41 are detected. While power supply to the electrode 32 is continued, power supply from the first power supply 41 to the bottom electrode 32 of the intermediate electrodeposition region Rm is started, the side electrode 31 and the bottom electrode 32 of the first electrodeposition region R1, and A first voltage V1 is applied to the bottom electrode 32 of the intermediate electrodeposition region Rm. At this time, the switch 43 is turned on and the switch 44 is turned off.

すなわち、ステップＳ１２０は、車体Ｗが中間電着領域Ｒｍに進入した後、第二電着領域Ｒ２に進入するまでの間に、第一電着領域Ｒ１及び中間電着領域Ｒｍにおいて、第一電圧Ｖ１に設定された印加電圧にて、車体Ｗに対する電着塗装を行う工程である。   That is, in step S120, the first voltage is applied in the first electrodeposition region R1 and the intermediate electrodeposition region Rm after the vehicle body W enters the intermediate electrodeposition region Rm and before entering the second electrodeposition region R2. This is a step of performing electrodeposition coating on the vehicle body W with an applied voltage set to V1.

ステップＳ１３０において、コントローラ５０は、搬送される車体Ｗの前端部が、第二電着領域Ｒ２に進入したことを検知すると、第一電源４１からの、第一電着領域Ｒ１の側面電極３１及び底部電極３２への給電、並びに、中間電着領域Ｒｍの底部電極３２への給電が停止されるとともに、第二電源４２からの、中間電着領域Ｒｍの底部電極３２への給電、並びに、第二電着領域Ｒ２の側面電極３１及び底部電極３２への給電が開始され、第二電着領域Ｒ２の側面電極３１及び底部電極３２、並びに、中間電着領域Ｒｍの底部電極３２に第二電圧Ｖ２を印加する。この場合、スイッチ４３はＯＦＦされ、スイッチ４４はＯＮされている。   In step S130, when the controller 50 detects that the front end of the transported vehicle body W has entered the second electrodeposition region R2, the side electrode 31 of the first electrodeposition region R1 from the first power source 41 and The power supply to the bottom electrode 32 and the power supply to the bottom electrode 32 in the intermediate electrodeposition region Rm are stopped, the power supply from the second power source 42 to the bottom electrode 32 in the intermediate electrodeposition region Rm, Power supply to the side electrode 31 and the bottom electrode 32 in the second electrodeposition region R2 is started, and a second voltage is applied to the side electrode 31 and the bottom electrode 32 in the second electrodeposition region R2 and the bottom electrode 32 in the intermediate electrodeposition region Rm. V2 is applied. In this case, the switch 43 is turned off and the switch 44 is turned on.

すなわち、ステップＳ１３０は、車体Ｗが第二電着領域Ｒ２に進入した後、中間電着領域Ｒｍから抜け出るまでの間に、第二電着領域Ｒ２及び中間電着領域Ｒｍにおいて、第二電圧Ｖ２に設定された印加電圧にて、車体Ｗに対する電着塗装を行う工程である。   That is, in step S130, the second voltage V2 is applied in the second electrodeposition region R2 and the intermediate electrodeposition region Rm after the vehicle body W enters the second electrodeposition region R2 and before exiting from the intermediate electrodeposition region Rm. This is a step of performing electrodeposition coating on the vehicle body W with the applied voltage set to.

ステップＳ１４０において、コントローラ５０は、搬送される車体Ｗの後端部が、第二電着領域Ｒ２に進入したことを検知すると、第二電源４２からの、第二電着領域Ｒ２の側面電極３１及び底部電極３２への給電が継続されるとともに、第二電源４２からの中間電着領域Ｒｍへの給電が停止され、第二電着領域Ｒ２の側面電極３１及び底部電極３２に第二電圧Ｖ２を印加する。この場合、スイッチ４３及びスイッチ４４はＯＦＦされている。   In step S140, when the controller 50 detects that the rear end of the conveyed vehicle body W has entered the second electrodeposition region R2, the side electrode 31 of the second electrodeposition region R2 from the second power source 42 is detected. In addition, power supply to the bottom electrode 32 is continued, power supply from the second power source 42 to the intermediate electrodeposition region Rm is stopped, and the second voltage V2 is applied to the side electrode 31 and the bottom electrode 32 in the second electrodeposition region R2. Apply. In this case, the switch 43 and the switch 44 are OFF.

すなわち、ステップＳ１４０は、車体Ｗが中間電着領域Ｒｍから抜け出て、完全に第二電着領域Ｒ２に位置した後に、第二電着領域Ｒ２において、第二電圧Ｖ２に設定された印加電圧にて、車体Ｗに対する電着塗装を行う工程である。   That is, in step S140, after the vehicle body W exits from the intermediate electrodeposition region Rm and is completely positioned in the second electrodeposition region R2, the applied voltage set to the second voltage V2 is set in the second electrodeposition region R2. This is a step of performing electrodeposition coating on the vehicle body W.

電着塗装装置１００及び電着塗装制御Ｓ１００の効果について説明する。
電着塗装装置１００及び電着塗装制御Ｓ１００によれば、車体Ｗに印加される電圧の一時的な低下を解消し、車体Ｗのロッカー部の膜厚を確保することができる。 The effects of the electrodeposition coating apparatus 100 and the electrodeposition coating control S100 will be described.
According to the electrodeposition coating apparatus 100 and the electrodeposition coating control S100, the temporary decrease in the voltage applied to the vehicle body W can be eliminated, and the film thickness of the rocker portion of the vehicle body W can be ensured.

すなわち、底部電極３２等の電極を備えた中間電着領域Ｒｍを設けない構成では、第一電着領域Ｒ１と第二電着領域Ｒ２とで印加電圧を切り替えるタイミングにて、車体Ｗがそれぞれの電着領域から遠ざかるため、車体Ｗに印加される電圧が一時的に低下する状態が発生する。
しかし、電着塗装装置１００及び電着塗装制御Ｓ１００によれば、中間電着領域Ｒｍを第一電着領域Ｒ１と第二電着領域Ｒ２との間に設置することで、中間電着領域Ｒｍが備える電極により、第一電着領域Ｒ１と第二電着領域Ｒ２との間の領域においても車体Ｗに電圧を印加することができるため、車体Ｗに印加される電圧が一時的に低下する状態を解消できる。 That is, in the configuration in which the intermediate electrodeposition region Rm including the electrode such as the bottom electrode 32 is not provided, the vehicle body W has each timing at which the applied voltage is switched between the first electrodeposition region R1 and the second electrodeposition region R2. In order to move away from the electrodeposition region, a state occurs in which the voltage applied to the vehicle body W temporarily decreases.
However, according to the electrodeposition coating apparatus 100 and the electrodeposition coating control S100, the intermediate electrodeposition region Rm is provided by installing the intermediate electrodeposition region Rm between the first electrodeposition region R1 and the second electrodeposition region R2. With the electrode included, the voltage can be applied to the vehicle body W even in the region between the first electrodeposition region R1 and the second electrodeposition region R2, so that the voltage applied to the vehicle body W temporarily decreases. The state can be resolved.

また、電着塗装装置１００及び電着塗装制御Ｓ１００によれば、中間電着領域Ｒｍに底部電極３２を配置することで、第一電着領域Ｒ１と第二電着領域Ｒ２との間の領域において、底部電極３２によって、従来から膜厚不足が課題とされていた車体Ｗの下部のロッカー部（特に、袋構造部の内板面）に集中して電圧を印加して電着塗装を行うことができ、ドアやフェンダー等の外板部分の膜厚を厚くすることなく、車体Ｗのロッカー部の膜厚を確保することができる。   Moreover, according to the electrodeposition coating apparatus 100 and the electrodeposition coating control S100, the region between the first electrodeposition region R1 and the second electrodeposition region R2 is provided by arranging the bottom electrode 32 in the intermediate electrodeposition region Rm. In this case, the bottom electrode 32 performs electrodeposition coating by applying a voltage concentrated on the lower rocker portion of the vehicle body W (especially the inner plate surface of the bag structure portion), which has conventionally been regarded as a problem of insufficient film thickness. Thus, the thickness of the rocker portion of the vehicle body W can be ensured without increasing the thickness of the outer plate portion such as a door or a fender.

１０ 電着槽
２０ 搬送装置
３１ 側面電極
３２ 底部電極
４０ 電圧印加装置
５０ コントローラ（制御手段）
１００ 電着塗装装置
Ｒ１ 第一電着領域
Ｒ２ 第二電着領域
Ｒｍ 中間電着領域
Ｖ１ 第一電圧
Ｖ２ 第二電圧
Ｗ 車体 DESCRIPTION OF SYMBOLS 10 Electrodeposition tank 20 Conveyance apparatus 31 Side electrode 32 Bottom electrode 40 Voltage application apparatus 50 Controller (control means)
100 Electrodeposition coating device R1 First electrodeposition region R2 Second electrodeposition region Rm Intermediate electrodeposition region V1 First voltage V2 Second voltage W

Claims (2)

塗料成分が貯溜され、搬送される車体を前記塗料成分に浸漬させた状態で、前記車体に対する電着塗装が行われる電着槽と、
前記電着層に配置され、前記車体に対して電圧を印加する複数の電極と、
前記電極への印加電圧を制御する制御手段を備え、
前記電着層は、前記電極からの印加電圧を第一電圧に設定して、前記車体に対する電着塗装を行う第一電着領域、及び前記第一電着領域よりも下流側に位置し、前記電極からの印加電圧を前記第一電圧よりも高い第二電圧に設定して、前記車体に対する電着塗装を行う第二電着領域を有する電着塗装装置であって、
前記電着層における前記第一電着領域と前記第二電着領域との間に、前記電着層の底部に電極が配置される中間電着領域を有し、
前記制御手段は、
前記車体が前記中間電着領域に進入した後、前記第二電着領域に進入するまでの間は、前記第一電着領域及び中間電着領域に配置される電極の印加電圧を前記第一電圧に制御し、前記車体が前記第二電着領域に進入した後、前記中間電着領域から抜け出るまでの間は、前記中間電着領域及び第二電着領域に配置される電極の印加電圧を前記第二電圧に制御する、
電着塗装装置。 In a state where the paint component is stored and the vehicle body to be conveyed is immersed in the paint component, an electrodeposition tank in which electrodeposition coating is performed on the vehicle body, and
A plurality of electrodes disposed on the electrodeposition layer and applying a voltage to the vehicle body;
Comprising control means for controlling the voltage applied to the electrode;
The electrodeposition layer is set to a first voltage applied from the electrode, a first electrodeposition region for performing electrodeposition coating on the vehicle body, and located downstream of the first electrodeposition region, An electrodeposition coating apparatus having a second electrodeposition region for performing electrodeposition coating on the vehicle body by setting the applied voltage from the electrode to a second voltage higher than the first voltage,
Between the first electrodeposition region and the second electrodeposition region in the electrodeposition layer has an intermediate electrodeposition region in which an electrode is disposed at the bottom of the electrodeposition layer,
The control means includes
After the vehicle body enters the intermediate electrodeposition region, the voltage applied to the electrodes disposed in the first electrodeposition region and the intermediate electrodeposition region is changed between the first electrodeposition region and the second electrodeposition region. The voltage applied to the electrodes disposed in the intermediate electrodeposition region and the second electrodeposition region after the vehicle body enters the second electrodeposition region and before exiting from the intermediate electrodeposition region is controlled To the second voltage,
Electrodeposition coating equipment. 塗料成分が貯溜され、搬送される車体を前記塗料成分に浸漬させた状態で、前記車体に対する電着塗装が行われる電着槽と、
前記電着層に配置され、前記車体に対して電圧を印加する複数の電極と、
前記電極への印加電圧を制御する制御手段を備え、
前記電着層は、前記電極からの印加電圧を第一電圧に設定して、前記車体に対する電着塗装を行う第一電着領域、及び前記第一電着領域よりも下流側に位置し、前記電極からの印加電圧を前記第一電圧よりも高い第二電圧に設定して、前記車体に対する電着塗装を行う第二電着領域を有する電着塗装装置を用いた電着塗装方法であって、
前記電着層における前記第一電着領域と前記第二電着領域との間に、前記電着層の底部に電極を配置した中間電着領域を設け、
前記制御手段により、
前記車体が前記中間電着領域に進入した後、前記第二電着領域に進入するまでの間は、前記第一電着領域及び中間電着領域に配置される電極の印加電圧を前記第一電圧に制御し、前記車体が前記第二電着領域に進入した後、前記中間電着領域から抜け出るまでの間は、前記中間電着領域及び第二電着領域に配置される電極の印加電圧を前記第二電圧に制御する、
電着塗装方法。 In a state where the paint component is stored and the vehicle body to be conveyed is immersed in the paint component, an electrodeposition tank in which electrodeposition coating is performed on the vehicle body, and
A plurality of electrodes disposed on the electrodeposition layer and applying a voltage to the vehicle body;
Comprising control means for controlling the voltage applied to the electrode;
The electrodeposition layer is set to a first voltage applied from the electrode, a first electrodeposition region for performing electrodeposition coating on the vehicle body, and located downstream of the first electrodeposition region, This is an electrodeposition coating method using an electrodeposition coating apparatus having a second electrodeposition region in which an applied voltage from the electrode is set to a second voltage higher than the first voltage to perform electrodeposition coating on the vehicle body. And
Between the first electrodeposition region and the second electrodeposition region in the electrodeposition layer is provided an intermediate electrodeposition region in which an electrode is disposed at the bottom of the electrodeposition layer,
By the control means,
After the vehicle body enters the intermediate electrodeposition region, the voltage applied to the electrodes disposed in the first electrodeposition region and the intermediate electrodeposition region is changed between the first electrodeposition region and the second electrodeposition region. The voltage applied to the electrodes disposed in the intermediate electrodeposition region and the second electrodeposition region after the vehicle body enters the second electrodeposition region and before exiting from the intermediate electrodeposition region is controlled To the second voltage,
Electrodeposition painting method.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002030486A (en) * 2000-07-12 2002-01-31 Poritekkusu:Kk Electrodeposition coating apparatus
JP2014122383A (en) * 2012-12-21 2014-07-03 Trinity Industrial Co Ltd Electrodeposition coating device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002030486A (en) * 2000-07-12 2002-01-31 Poritekkusu:Kk Electrodeposition coating apparatus
JP2014122383A (en) * 2012-12-21 2014-07-03 Trinity Industrial Co Ltd Electrodeposition coating device

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