JP2007029846A - Process liquid recovery device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a process liquid recovery device which can decrease a quantity consumed of a process liquid. <P>SOLUTION: The process liquid recovery device 50 to recover the process liquid flowing out from a car body 4 after the predetermined treatment of the body 4 using the process liquid is provided with a drain pan 51 recovering the process liquid flowing out from the body 4, and a guide rail 52 for the drain pan guiding the drain pan 51 along a carrying direction of the body 4. The drain pan 51 moves following the body 4 by utilizing the driving force of an overhead conveyor 2 carrying the body 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a processing liquid recovery apparatus and a processing liquid recovery method for recovering a processing liquid flowing out from an object to be processed after performing pretreatment, electrodeposition coating, or the like on the object to be processed such as an automobile body or a part. .

  Electrodeposition coating is generally used as an undercoat for automobile bodies, but before this electrodeposition coating is applied, so-called pretreatment is performed in which the automobile body is washed or a chemical conversion film is formed.

  This pretreatment consists of a degreasing / cleaning process that removes oil, iron powder, dust, etc. adhering to the automobile body, and a surface conditioning / chemical conversion process that forms a chemical conversion film on the surface of the cleaned body. ing. In addition, electrodeposition coating is performed by dipping the workpiece into the electrodeposition solution and applying a voltage to deposit the coating film electrochemically, and adhere to the workpiece after electrodeposition coating. And an electrodeposition cleaning step of washing away the electrodeposition liquid.

  In such pretreatment and electrodeposition coating, various treatment liquids such as a degreasing liquid, a surface conditioning liquid, a chemical conversion treatment liquid, an electrodeposition liquid, and washing water are used. Therefore, each processing zone is provided with a recovery zone that collects the processing liquid that drips from the processed object by using an inclination in order to prevent the processing liquid from being taken out to another processing zone. Yes.

  By the way, from the viewpoint of cost reduction and quality improvement, it is desirable to improve the recovery rate of the processing liquid and reduce the amount of processing liquid used. However, since it is necessary to secure a long recovery zone for this, there is a problem that the capital investment increases and the time for the workpiece to pass through the process becomes long.

  In addition, since the installation of the collection zone affects the pretreatment / electrodeposition coating equipment and the equipment base, it is very difficult to change the collection zone once installed or shortened.

An object of the present invention is to provide a processing liquid recovery apparatus and a processing liquid recovery method capable of reducing the amount of processing liquid used.
In order to achieve the above object, according to the present invention, there is provided a processing liquid recovery apparatus for recovering the processing liquid flowing out from the processing object after performing a predetermined processing on the processing object using the processing liquid. A processing liquid recovery apparatus comprising: a recovery means for recovering the processing liquid flowing out of the object to be processed; and a moving means for moving the recovery means following the object to be transported. Provided.

  In order to achieve the above object, according to the present invention, a treatment liquid recovery for collecting the treatment liquid flowing out from the treatment object after performing a predetermined treatment on the treatment object using the treatment liquid. There is provided a processing liquid recovery method in which the recovery means recovers the processing liquid flowing out from the processing object while causing the recovery means to follow the processing object to be conveyed.

  In the present invention, a period for collecting the processing liquid flowing out from the processed object after the processing by moving the recovery means to follow the processed object after performing the predetermined process using the processing liquid is provided. Since it can be ensured for a long time, the recovery rate of the processing liquid is improved, and the amount of processing liquid used can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic side view showing the overall configuration of a pretreatment to electrodeposition coating line in an embodiment of the present invention.

  FIG. 1 shows an example of a pretreatment to an electrodeposition coating line in a coating line. First, referring to FIG. 1, an outline of a pretreatment to electrodeposition coating line to which a treatment liquid recovery apparatus and a treatment liquid recovery method according to an embodiment of the present invention are applied will be described. In the following description, the generic term for the process of removing oil, iron powder, dust, etc. adhering to the white body is referred to as a degreasing and cleaning step A, and then the generic term for the step of forming a chemical conversion film on the white body as a chemical treatment step B. A general term for a process of forming an electrodeposition coating film on a body on which a chemical conversion film is formed is referred to as an electrodeposition process C.

  The white body which has finished the assembly of the pressed parts is transferred from the carriage to the painting hanger 3 by the drop lifter of the vehicle body assembly line, and is transferred to the pretreatment to the electrodeposition coating line 1 by the overhead conveyor 2.

  Since the white body 4 carried into the pretreatment to the electrodeposition coating line 1 is attached with press oil, iron powder by welding, and other dusts, these oil components are removed in the degreasing and washing step A before chemical conversion treatment. Iron powder and dust are removed. In the example shown in FIG. 1, the degreasing and cleaning step A includes a preliminary degreasing step A1 and a main degreasing step A2 for mainly removing oil, and a degreasing liquid and a body 4 used in the preliminary degreasing step A1 and the main degreasing step A2. The first water washing step A3 and the second water washing step A4 for removing the iron powder and dust adhering to the water.

  As shown in FIG. 1, the preliminary degreasing step A <b> 1 is a so-called shower-type liquid contact method in which the degreasing liquid stored in the tank 12 is pumped up and sprayed from the nozzle 11 toward the body 4. On the other hand, this degreasing process A2 employs a so-called full-dip type liquid contact method in which the body 4 is completely immersed in the degreasing liquid accommodated in the degreasing tank 13. However, in the present invention, the liquid contact method and the number of stages (two stages of preliminary degreasing and main degreasing in this example) are not limited at all and can be appropriately changed.

  Since the body 4 is moved up and down as the overhead conveyor 2 moves up and down, the body 4 can be immersed in the degreasing liquid filled in the degreasing tank 13 by the transport of the overhead conveyor 2. Yes. The same applies to each dip tank 14, 21, 22, 25, 31 and 32 described later.

  The preliminary degreasing step A1 includes a processing zone L1 for spraying a degreasing liquid (processing liquid) on the body 4, and a recovery zone L2 for recovering the degreasing liquid flowing down from the body 4 exiting the processing zone L1 after spraying of the degreasing liquid is completed. It is equipped with. Similarly, the degreasing step A2 includes a processing zone L1 for completely immersing the body 4 in a degreasing liquid (processing liquid), and a recovery zone L2 for collecting the degreasing liquid flowing down from the body 4 discharged from the degreasing tank 13. Yes. Each of the recovery zones L2 includes an inclined surface that descends toward the tank 12 and the degreasing tank 13 in order to recover the degreasing liquid using gravity.

  The first water washing step A3 is a so-called full-dip type liquid contact method in which the body is immersed in the working water accommodated in the water washing tank 14 so that the body is completely immersed. In contrast, the second water washing step A4 employs a so-called shower-type liquid contact method in which the working water stored in the tank 16 is pumped up and sprayed from the nozzle 15 toward the body 4. However, in the present invention, the liquid contact method and the number of stages (in this example, two stages of the first water washing and the second water washing) are not limited at all and can be appropriately changed.

  The first water washing step A3 includes a treatment zone L1 that completely immerses the body 4 in the working water (treatment liquid) and a recovery zone L2 that collects the working water flowing down from the body 4 discharged from the water washing tank 14. . The second water washing step A4 also includes a treatment zone L1 for spraying the working water (treatment liquid) to the body 4, and a recovery zone L2 for collecting the working water flowing down from the body 4 that has exited the processing zone L1 after the spraying of the working water is completed. And. Each of the recovery zones L2 is configured by an inclined surface that descends toward the washing tank 14 or the tank 16 in order to recover the construction water using gravity.

  A chemical conversion treatment step B for forming a chemical conversion film on the white body 4 cleaned by the degreasing cleaning step A is provided. In the example shown in FIG. 1, this chemical conversion treatment process B includes a surface adjustment process B1 for adjusting the surface of the body 4 in preparation for film formation, a chemical conversion film formation process B2 for forming a chemical conversion film on the body 4, and an extra chemical conversion process. It consists of the 3rd water washing process B3 and the 4th water washing process B4 which wash away a processing liquid, and the pure water washing process B5 which prevents the rusting by a chemical conversion liquid.

  As shown in FIG. 1, the surface adjustment step B <b> 1 employs a so-called full-dip type liquid contact method, and the body 4 is completely immersed in the surface adjustment liquid accommodated in the treatment tank 21. In this surface conditioning step B1, the surface conditioning agent component is adsorbed on the surface of the body 4 that is the object to be processed, thereby increasing the number of reaction starting points in the chemical conversion film forming step B2 of the next step, and the adsorbed surface conditioning component. Plays the role of accelerating the film-forming reaction.

  In the chemical conversion film forming step B2, a so-called full dip type liquid contact method is adopted, and the body 4 is completely immersed in the chemical conversion treatment liquid accommodated in the treatment tank 22 and immersed for a predetermined time, so that zinc phosphate is formed on the surface. A system conversion coating is formed. FIG. 1 shows a so-called full-dip type treatment tank 22, but a half-dip type chemical treatment that immerses only the lower part of the body 4 and showers the upper part of the body 4, or a shower type chemical conversion process that showers the entire body 4. It is also possible to adopt.

  The surface conditioning step B1 includes a processing zone L1 that completely immerses the body 4 in the surface conditioning liquid (processing liquid), and a recovery zone L2 that recovers the surface conditioning liquid that flows down from the body 4 that has come out of the processing tank 21. Yes. The chemical conversion film forming step B2 also includes a treatment zone L1 in which the body 4 is completely immersed in the chemical conversion treatment liquid (treatment liquid), and a recovery zone L2 for collecting the chemical conversion treatment liquid flowing down from the body 4 discharged from the treatment tank 22. ing. Each of the recovery zones L2 includes an inclined surface that descends toward the respective treatment tanks 21 and 22 in order to collect the surface conditioning liquid and the chemical conversion treatment liquid using gravity.

  The third water washing step B3 is a so-called shower-type liquid contact method in which the working water stored in the tank 24 is pumped up and sprayed from the nozzle 23 toward the body 4, whereas the fourth water washing step B4 is A so-called full dip type liquid contact method is adopted in which the body is immersed in the working water accommodated in the water washing tank 25 so as to be in contact with the body. However, in the present invention, the liquid contact method and the number of stages (in this example, two stages of the third water washing and the fourth water washing) are not limited at all and can be appropriately changed.

  The third water washing step B3 includes a treatment zone L1 for spraying the working water (treatment liquid) to the body 4, and a recovery zone L2 for collecting the working water flowing down from the body 4 exiting the treatment zone L1 after the completion of the spraying of the working water. And. The fourth water washing step B4 also includes a treatment zone L1 that completely immerses the body 4 in the working water (treatment liquid) and a recovery zone L2 that collects the working water flowing down from the body 4 discharged from the water washing tank 25. . Each of the recovery zones L2 includes an inclined surface that descends toward the tank 24 and the washing tank 25 in order to recover the construction water using gravity.

  As shown in FIG. 1, the pure water washing step B5 is a so-called shower-type liquid contact method in which pure water (or deionized water) stored in the tank 27 is pumped up and sprayed from the nozzle 26 toward the body 4. is there. By spraying pure water, it is possible to prevent rust from being generated in the body 4 between the chemical conversion film forming step B2 and the electrodeposition coating step C1.

  This pure water washing step B5 includes a treatment zone L1 for spraying pure water (treatment liquid) onto the body 4, and a recovery zone L2 for collecting pure water flowing from the body 4 exiting from the treatment zone L1 after the spraying of pure water is completed. And. The recovery zone L2 includes an inclined surface that descends toward the tank 27 in order to recover the construction water using gravity.

  An electrodeposition coating process C is provided after the pure water washing process B4. In the example shown in FIG. 1, the electrodeposition step C includes an electrodeposition coating step C1 for forming an electrodeposition coating film, a first electrodeposition water washing step C2 for washing off the electrodeposition liquid adhering after the electrodeposition coating, 2 electrodeposition water washing process C3.

  The electrodeposition coating process C1 is a process of forming an electrodeposition coating film on the surface of the body 4 by the electrophoretic action of the electrodeposition liquid, and has a boat-shaped electrodeposition tank 31 filled with the electrodeposition liquid, and a coating hanger. 3, the body 4 is immersed in the electrodeposition liquid, and a high voltage is applied to a plurality of electrode plates (not shown) provided on the side wall and the bottom wall in the electrodeposition tank 31, and the body 4 side Electrodeposition coating is applied by grounding. At this time, since the electrodeposition liquid also enters the bag structure of the body 4, an electrodeposition coating film is also formed on the inner surface of the bag structure. As the electrodeposition liquid, it is preferable to use a cation type electrodeposition paint for rust prevention, but an anion type electrodeposition paint that grounds the electrodeposition liquid side and applies a high voltage to the body 4 side may be used. Absent.

  The electrodeposition coating process C1 includes a treatment zone L1 in which the body 4 is completely immersed in an electrodeposition liquid (treatment liquid), and a recovery zone L2 in which the electrodeposition liquid flowing down from the body 4 discharged from the electrodeposition tank 31 is collected. I have. As shown in FIG. 1, the recovery zone L <b> 2 includes an inclined surface that descends toward the electrodeposition tank 31 in order to recover the electrodeposition liquid using gravity.

  The first electrodeposition rinsing step C2 is a so-called full dip type liquid contact method in which the body is immersed in the working water accommodated in the water rinsing tank 32 so that the body is completely immersed. On the other hand, the second electrodeposition water washing step C3 employs a so-called shower-type liquid contact method in which the working water stored in the tank 34 is pumped up and sprayed from the nozzle 33 toward the body 4. However, in the present invention, the liquid contact method and the number of stages (in this example, two stages of first electrodeposition water washing and second electrodeposition water washing) are not limited at all and can be changed as appropriate. Moreover, you may further provide the electrodeposition pure water washing process using a pure water after the 2nd electrodeposition water washing process C3.

  The first electrodeposition washing step C2 includes a treatment zone L1 in which the body 4 is completely immersed in the working water (treatment liquid), and a recovery zone L2 for collecting the working water flowing down from the body 4 discharged from the washing tank 32. ing. The second electrodeposition washing step C3 also collects the processing zone L1 for spraying the working water (processing liquid) onto the body 4 and the working water flowing down from the body 4 exiting the processing zone L1 after the spraying of the working water is completed. A recovery zone L2. As shown in FIG. 1, each recovery zone L <b> 2 is composed of an inclined surface that descends toward the washing tank 32 and the tank 34 in order to recover the construction water using gravity.

  The processing liquid recovery apparatus 50 according to the first embodiment of the present invention will be described below.

  2A and 2B are schematic side views showing the treatment liquid recovery apparatus according to the embodiment of the present invention. FIG. 2A shows a state in which the drain pan is at the origin position (state before follow-up), and FIG. The state at a far position (the state after following) is shown. 3A is a detailed side view of the processing liquid recovery apparatus in the state shown in FIG. 2A, and FIG. 3B is a detailed front view of the processing liquid recovery apparatus in the state shown in FIG. 2A. 4A is a detailed side view of the processing liquid recovery apparatus in the state shown in FIG. 2B, and FIG. 4B is a detailed front view of the processing liquid recovery apparatus in the state shown in FIG. 2B.

  The processing liquid recovery apparatus 50 according to the present embodiment uses the driving force of the overhead conveyor 2 to move the drain pan 51 following the body 4 that has finished the predetermined processing (degreasing, surface adjustment, chemical conversion processing, electrodeposition or water washing). Is a device that collects the treatment liquid (degreasing liquid, surface conditioning liquid, chemical conversion treatment liquid, electrodeposition liquid, industrial water, or pure water) flowing down from the body 4, as shown in FIGS. 2A and 2B. Are provided in each recovery zone L2 of each of the steps A1 to C3. As shown in FIGS. 3A to 4B, the processing liquid recovery apparatus 50 includes a drain pan 51, a drain pan guide rail 52, a pulling pin 53, and a pulling pin guide rail 54.

  The drain pan guide rail 52 is provided so as to gradually rise along the moving direction of the coating hanger 3. In addition, rollers 51 a that can rotate with respect to the drain pan 51 are provided on both sides of the drain pan 51. The roller 51a rolls on the drain pan guide rail 52, whereby the drain pan 51 is guided by the drain pan guide rail 52, and the drain pan 51 can rise while being inclined.

  The pulling pin 53 includes a pin part 53a that is provided so as to penetrate the drain pan 51 so as to be movable along the vertical direction, and a roller part 53b that is rotatably attached to the lower part of the pin part 53a. Further, the tow pin guide rail 54 is provided so as to gradually descend along the moving direction of the coating hanger 3. The roller portion 53b of the traction pin 53 rolls on the traction pin guide rail 54, whereby the traction pin 53 is guided by the traction pin guide rail 54 and the traction pin 53 can be lowered. Yes.

  Next, the operation of the processing liquid recovery apparatus 50 according to this embodiment will be described.

  As shown in FIG. 2A, after the predetermined processing is performed in the processing zone L1, when the lower part 3a of the coating hanger 3 reaches the end of the recovery zone L2 by the transport of the overhead conveyor 2, as shown in FIGS. 3A and 3B. The pulling pin 53 of the drain pan 51 waiting at the origin position engages with the lower part 3a of the painting hanger 3, and the drain pan 51 is moved with respect to the body 4 by the conveyance of the overhead conveyor 2 proceeding in the direction W1 in the drawing. The follow-up movement is started in the W2 direction. During this follow-up movement, the processing liquid flowing down from the body 4 is collected in the drain pan 51, and the processing liquid recovered in the drain pan 51 flows, for example, from the rear end of the drain pan 51 into the recovery zone L2.

  As the overhead conveyor 2 is conveyed, the traction pin 53 is guided along the traction pin guide rail 54 and gradually descends in the direction W3 in the drawing. For this reason, as shown in FIG. 2B, immediately before the rear end of the drain pan 51 leaves the recovery zone L2, as shown in FIGS. 4A and 4B, the engagement of the traction pin 53 with the coating hanger 3 is released, The follow-up movement of the drain pan 51 stops.

  At this time, since the drain pan 51 is guided along the drain pan guide rail 52 and gradually rises along with the transport of the overhead conveyor 2, the drain pan 51 in which the engagement of the pulling pin 53 is released is used for the drain pan by its own weight. It returns to the origin position while being guided by the guide rail 52.

  As described above, in the processing liquid recovery apparatus 50 and the processing liquid recovery method according to the first embodiment of the present invention, the processing liquid (degreasing liquid, surface conditioning liquid, chemical conversion liquid, electrodeposition liquid, industrial water, or pure water). Treatment that flows out from the body 4 after the treatment by moving the drain pan 51 with respect to the body 4 after performing the predetermined treatment (degreasing, surface adjustment, chemical conversion film formation, electrodeposition coating or washing with water) Since the liquid recovery period can be secured longer to the recovery extension zone L3 shown in FIG. 2B in addition to the recovery zone L2, the recovery rate of the processing liquid is improved and the amount of processing liquid used is reduced. I can plan.

  In the first embodiment of the present invention, the overhead conveyor 2 is used as a moving means for moving the drain pan 51 to follow the body 4, or the drain pan 51 is returned to the origin using gravity, so that the processing liquid is recovered. The apparatus 50 itself can have a simple configuration without providing its own drive / control system.

  Next, a processing liquid recovery apparatus 50 'according to a second embodiment of the present invention will be described.

  5A and 6A are detailed side views of the processing liquid recovery apparatus according to the second embodiment of the present invention. FIG. 5A is a diagram showing a state before following, and FIG. 6A is a diagram showing a state after following. . 5B and 6B are detailed front views of the processing liquid recovery apparatus according to the second embodiment of the present invention, FIG. 5B is a diagram showing a state before tracking, and FIG. 6B is a diagram showing a state after tracking. .

  Similar to the processing liquid recovery apparatus 50 according to the first embodiment, the processing liquid recovery apparatus 50 ′ according to the second embodiment of the present invention uses the driving force of the overhead conveyor 2 to perform predetermined processing (degreasing, surface adjustment). The treatment liquid (degreasing liquid, surface conditioning liquid, chemical conversion treatment liquid, electrodeposition liquid, industrial water or pure water) flowing down from the body 4 while the drain pan 51 is moved following the body 4 after chemical conversion treatment, electrodeposition or water washing. Water) and is provided in each recovery zone L2 of each of the above-described steps A1 to C3.

  As shown in FIGS. 5A to 6B, the processing liquid recovery apparatus 50 ′ according to this embodiment includes a drain pan 51, a drain pan guide rail 52, a pulling hook 55, a counter weight 56, and a disengagement roller 57. And is composed of.

  The drain pan guide rail 52 is provided so as to gradually rise along the moving direction of the coating hanger 3. In addition, rollers 51 a are provided on both sides of the drain pan 51 so as to be rotatable with respect to the drain pan 51. The roller 51a rolls on the drain pan guide rail 52, whereby the drain pan 51 is guided by the drain pan guide rail 52, and the drain pan 51 can rise while being inclined.

  The tow hook 55 is a substantially L-shaped member that is rotatably supported by the drain pan 51 at its substantially center, and a counterweight 56 is provided at the rear end thereof. Further, a disengagement roller 57 is provided at a position where the counter weight 56 has moved along the traveling direction of the coating hanger 3.

  Next, the operation of the processing liquid recovery apparatus 50 'according to this embodiment will be described.

  When the lower part 3a of the coating hanger 3 comes to the end of the recovery zone L2 by carrying the overhead conveyor 2 after performing the predetermined process in the processing zone L1 (see FIG. 2A), as shown in FIGS. 5A and 5B, The tow hook 55 of the drain pan 51 waiting at the position engages with the lower part 3a of the coating hanger 3, and the drain pan 51 is moved with respect to the body 4 by the overhead conveyor 2 traveling in the W1 direction in the figure. Start following movement. During this follow-up, the processing liquid flowing down from the body 4 is collected in the drain pan 51, and the processing liquid recovered in the drain pan 51 flows, for example, from the rear end of the drain pan 51 into the recovery zone L2.

  When the drain pan 51 is sufficiently moved by the transport of the overhead conveyor 2 and the counterweight 56 comes into contact with the disengagement roller 57, the tow hook 55 rotates in the direction W4 in the drawing with respect to the drain pan 51, and the coating hanger 3 The engagement of the tow hook 55 with respect to is released.

  At this time, the drain pan 51 is guided along the drain pan guide rail 52 and gradually rises as the overhead conveyor 2 is transported. It returns to the origin position while being guided by the guide rail 52.

  As described above, in the processing liquid recovery apparatus 50 ′ and the processing liquid recovery method according to the second embodiment of the present invention, the processing liquid (degreasing liquid, surface conditioning liquid, chemical conversion liquid, electrodeposition liquid, industrial water, or pure water is used. ), The drain pan 51 is moved following the body 4 after being subjected to a predetermined treatment (degreasing, surface adjustment, chemical conversion film formation, electrodeposition coating or washing with water), so that the body 4 after the treatment flows out. Since it is possible to secure a long period for collecting the processing liquid, the recovery rate of the processing liquid can be improved, and the amount of the processing liquid used can be reduced.

  In the second embodiment of the present invention, the overhead conveyor 2 is used as a moving means for moving the drain pan 51 to follow the body 4, or the drain pan 51 is returned to the origin using gravity, so that the processing liquid is recovered. The device 50 'can be configured simply.

  Next, a processing liquid recovery apparatus 50 ″ according to a third embodiment of the present invention will be described.

  FIG. 7 is a side view showing a processing liquid recovery apparatus according to the third embodiment of the present invention.

  Unlike the processing liquid recovery apparatus 50 according to the first embodiment, the processing liquid recovery apparatus 50 ″ according to the third embodiment of the present invention uses a driving force of a drive device 59 that is uniquely provided to perform predetermined processing (degreasing, surface removal). The treatment liquid (degreasing liquid, surface conditioning liquid, chemical conversion treatment liquid, electrodeposition liquid, industrial water or water flowing down from the body 4 while moving the drain pan 51 following the adjustment, chemical conversion treatment, electrodeposition or water washing) (Pure water) is provided in each recovery zone L2 of each of the above-described steps A1 to C3.

  As shown in FIG. 7, the processing liquid recovery apparatus 50 ″ according to the present embodiment includes a drain pan 51, a conveyor 58 having the drain pan 51 fixed on the upper surface, a motor, a speed reducer, and the like, and drives the conveyor 58. And a control device 60 that controls the drive of the drive device 59.

  In the processing liquid recovery apparatus 50 ″, first, the control device 60 acquires specification information regarding the specifications of the body 4 flowing through the line from a production management system (not shown). The control device 60 then acquires the specification information from the database. By referring to the above, various control data corresponding to the specifications of the body 4 such as the start timing, moving speed, and moving distance of the drain pan 51 are extracted, and the conveyor 59 is controlled based on the control data. .

  The conveyor 59 drives the drain pan 51 in the W5 direction in the drawing at a predetermined speed based on the command signal sent from the control device 60. When the drain pan 51 follows the body 4 and moves by a predetermined distance, the drive of the conveyor 59 is stopped and the following operation of the drain pan 51 is stopped. During this follow-up movement, the processing liquid flowing down from the body 4 is collected in the drain pan 51, and further flows down to the collection zone L2 along the drain pan 51 provided on the conveyor 58 in an inclined manner.

  When the follow-up operation is completed, the control device 60 sends a command signal for driving the drive device 59 in the reverse direction, whereby the conveyor 58 is driven in the opposite direction (W6 direction in the figure), and the drain pan 51 is brought to the origin position. Return.

  As described above, in the processing liquid recovery apparatus 50 ″ and the processing liquid recovery method according to the third embodiment of the present invention, the processing liquid (degreasing liquid, surface conditioning liquid, chemical conversion liquid, electrodeposition liquid, industrial water, or pure water is used. ), The drain pan 51 is moved to follow the body 4 after being subjected to a predetermined process (degreasing, surface adjustment, chemical conversion film formation, electrodeposition coating, or washing with water) to flow out of the body 4 after the process. Since it is possible to secure a long period for collecting the processing liquid, the recovery rate of the processing liquid can be improved, and the amount of the processing liquid used can be reduced.

  Further, in the third embodiment of the present invention, information related to the specification of the body 4 is acquired, and the drive device 59 is controlled based on the specification information. Therefore, the movement start timing of the drain pan 51, the moving speed of the drain pan 51, and the movement The distance and the like can be individually controlled based on the specification of the object to be processed, and the effective processing liquid can be recovered according to the object to be processed.

  The embodiment described above is described in order to facilitate understanding of the present invention, and is not described in order to limit the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention. In the above-described embodiment, it has been described that each of the recovery zones L2 of the steps A1 to C3 of the pretreatment to the electrodeposition coating line 1 is provided with the treatment liquid recovery device, but the present invention is not particularly limited thereto. You may provide the process liquid collection | recovery apparatus based on this invention only in a specific process.

FIG. 1 is a schematic side view showing an overall configuration of a pretreatment to electrodeposition coating line in an embodiment of the present invention. FIG. 2A is a schematic side view showing the processing liquid recovery apparatus according to the embodiment of the present invention, and shows a state where the drain pan is at the origin position (a state before following). FIG. 2B is a schematic side view showing the processing liquid recovery apparatus according to the embodiment of the present invention, and shows a state where the drain pan is at the farthest position (the state after following). FIG. 3A is a detailed side view of the processing liquid recovery apparatus in the state shown in FIG. 2A. FIG. 3B is a detailed front view of the processing liquid recovery apparatus in the state shown in FIG. 2A. FIG. 4A is a detailed side view of the processing liquid recovery apparatus in the state shown in FIG. 2B. FIG. 4B is a detailed front view of the processing liquid recovery apparatus in the state shown in FIG. 2B. FIG. 5A is a detailed side view of the processing liquid recovery apparatus according to the second embodiment of the present invention, and shows a state before tracking. FIG. 5B is a detailed front view of the processing liquid recovery apparatus according to the second embodiment of the present invention, and shows a state before tracking. FIG. 6A is a detailed side view of the processing liquid recovery apparatus according to the second embodiment of the present invention, and shows a state after tracking. FIG. 6B is a detailed front view of the processing liquid recovery apparatus according to the second embodiment of the present invention, and shows a state after the follow-up. FIG. 7 is a side view showing a processing liquid recovery apparatus according to the third embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Pretreatment-electrodeposition coating line 2 ... Overhead conveyor 3 ... Paint hanger 3a ... Hanger lower part 4 ... Automobile body (processed object)
A1 ... Pre-degreasing step A2 ... Main degreasing step A3 ... First water washing step A4 ... Second water washing step B1 ... Surface adjustment step B2 ... Chemical conversion film forming step B3 ... Third water washing step B4 ... Fourth water washing step C1 ... Electrodeposition coating Step C2 ... First electrodeposition water washing step C3 ... Second electrodeposition water washing step L1 ... Treatment zone L2 ... Recovery zone L3 ... Recovery extension zones 50, 50 ', 50 "... Treatment liquid recovery device 51 ... Drain pan 51a ... Roller 52 ... Drain pan guide rail 53 ... Traction pin 53a ... Pin portion 53b ... Roller portion 54 ... Traction pin guide rail 55 ... Traction hook 56 ... Counter weight 57 ... Disengagement roller 58 ... Conveyor 59 ... Drive device 60 ... Control device

Claims (11)

A processing liquid recovery apparatus for recovering the processing liquid flowing out from the processing object after performing a predetermined process on the processing object using the processing liquid,
Recovery means for recovering the processing liquid flowing out of the object to be processed;
And a moving means for moving the collecting means following the object to be processed.   The processing liquid recovery apparatus according to claim 1, further comprising return means for returning the recovery means to the origin when the object to be processed is conveyed to a predetermined position.   The processing liquid recovery apparatus according to claim 1, wherein the moving unit includes a transfer unit that transfers the object to be processed.   The processing liquid recovery apparatus according to claim 2 or 3, wherein the return means returns the recovery means to the origin by utilizing its own weight. The collecting means has an engaging member that can be engaged with the conveying means,
5. The treatment liquid recovery according to claim 3, wherein the return unit returns the recovery unit to the origin by utilizing the weight of the recovery unit by releasing the engagement of the engagement member with the transport unit. apparatus.   The processing liquid recovery apparatus according to claim 4, wherein the return means includes a guide member that guides the recovery means to be raised along the traveling direction of the object to be processed. Obtaining means for obtaining information on specifications of the workpiece;
The processing liquid recovery apparatus according to claim 1, further comprising a control unit that controls the moving unit based on the specification information acquired by the acquiring unit. A processing liquid recovery method for recovering the processing liquid flowing out from the processing object after performing a predetermined process on the processing object using the processing liquid,
A processing liquid recovery method in which the recovery means recovers the processing liquid flowing out from the processing object while causing the recovery means to follow the object to be transported.   9. The process liquid recovery method according to claim 8, wherein when the object to be processed is transported to a predetermined position, the recovery means returns to the origin.   The process liquid recovery method according to claim 9, wherein the recovery means returns to the origin by using its own weight. The processing liquid recovery method according to claim 8, wherein information on the specification of the object to be processed is acquired, and movement of the recovery unit is controlled based on the specification information.

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