JP2007077477A - Pretreatment electrodeposition coating device, and work conveying method in the pretreatment electrodeposition coating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pretreatment electrodeposition coating device having operation efficiency higher than that in the conventional one, and to provide a work conveying method in the pretreatment electrodeposition coating device for increasing the operation efficiency compared with that in the conventional one. <P>SOLUTION: The pretreatment electrodeposition coating device is equipped with a tact type conveying apparatus comprising: a conveyance rail extending from the start point to the end point in treatment tank arrangement at the upper part of a plurality of treatment tanks arranged in series; a pair of trolleys engaged with the conveyance rail at intervals each other in the extending direction of the carrier rail; a truck frame suspended from the trolleys; a pair of hoists fitted to the truck frame at intervals each other in the extending direction of the carrier rail; hanger frames suspended from the lower edges of the elevating chains of a pair of the hoists; hangers fitted to the hanger frames; and a controller of controlling the trolleys and hoists. The controller in the tact type conveying apparatus controls the hoists in such a manner that, between the start point and the end point in the treatment tank arrangement, the hanger frames moving in the respective treatment tanks and between the respective treatment tanks are always tilted to either the front or rear in the conveying direction at a prescribed angle. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a pretreatment electrodeposition coating apparatus and a method for conveying an object to be processed in the pretreatment electrodeposition coating apparatus.

In the patent document 1, the applicant of the present application has one conveyance rail extending from the start point to the end point of the treatment tank array above the plurality of treatment tanks arranged in series, and in the extending direction of the conveyance rail. A pair of trolleys that engage with the transport rail at a distance from each other, a cart girder suspended from the trolley, a pair of hoists attached to the cart girder at a distance from each other in the extending direction of the transport rail, and a pair A pretreatment electrodeposition coating apparatus comprising a hanger frame suspended at the lower end of the hoist lifting / lowering chain of the hoist, a hanger attached to the hanger frame, and a control device for controlling the trolley and the hoist. The hanger of the tact type transporting device travels / stops in a state where the lifting / lowering chain is extended, moves up and down, tilts forward or backward in the transport direction, or swings forward and backward, or these When only the combined operations, has proposed a processing electrodeposition coating apparatus before the shaking prevention measures that can prevent unwanted shaking of the hanger have been taken.
As described in Patent Document 1, in general, in a tact type transfer device of a pretreatment electrodeposition coating apparatus, a coating is performed from the start point to the end point of a treatment tank array composed of a plurality of treatment tanks arranged in series. When transporting the processed material, the hanger frame is swung forward and backward in the transport direction in the processing tank. Moreover, when conveying a to-be-processed part from a processing tank to a processing tank, the to-be-processed object is hold | maintained horizontally.

In Patent Document 2, etc., one transport rail that extends from the start point to the end point of the processing tank array above a plurality of processing tanks arranged in series and a distance from each other in the extending direction of the transport rail. An electrodeposition coating apparatus is disclosed that includes a continuous conveyance device having a trolley that engages with a conveyance rail and a hanger suspended from the trolley.
In an electrodeposition coating apparatus and a pretreatment electrodeposition coating apparatus provided with a continuous transport apparatus such as Patent Document 1, conventionally, a hanger is held parallel to the transport rail, and thus the processing tank in which the transport rail extends horizontally. The hanger is held horizontally in the intermediate transfer process and the transfer process in the center of the treatment tank.
Japanese Patent No. 3539637 JP-A-7-113197

In the tact type transfer device provided in the conventional pretreatment electrodeposition coating apparatus, the hanger frame is swung forward and backward in the transfer direction in the treatment tank, and the hanger frame is horizontally moved when moving from the treatment tank to the treatment tank. Therefore, in order to prevent interference between workpieces adjacent to each other before and after in the transport direction, it is necessary to set the arrangement pitch of the hanger frame wide, and the operating efficiency of the pretreatment electrodeposition coating apparatus is improved. Since there is a problem that the hanger is held parallel to the transport rail in the continuous transport device provided in the conventional pretreatment electrodeposition coating apparatus, the workpieces adjacent to the front and rear in the transport direction In order to prevent mutual interference, it is necessary to set a wide arrangement pitch of the hanger frames, and there is a problem that the operating efficiency of the pretreatment electrodeposition coating apparatus cannot be increased.
The present invention has been made in view of the above problems, and the operating efficiency of the pretreatment electrodeposition coating apparatus and the pretreatment electrodeposition coating apparatus provided with a tact type conveying apparatus and a continuous type conveying apparatus having a higher operating efficiency than conventional ones. It is an object of the present invention to provide a method for conveying an object to be processed in a pretreatment electrodeposition coating apparatus that uses a tact type conveyance device or a continuous type conveyance device that can increase the conventional method.

In order to solve the above-described problem, in the present invention, one conveyance rail extending from the start point to the end point of the treatment tank array above the plurality of treatment tanks arranged in series, and the extension of the conveyance rail A pair of trolleys that engage the transport rails spaced apart from each other in the direction, a cart girder suspended from the trolleys, and a pair of hoists attached to the cart girder spaced apart from each other in the direction in which the transport rails extend A tact type conveying device having a hanger frame suspended from the lower ends of the lifting hoist chains of a pair of hoists, a hanger attached to the hanger frame, and a control device for controlling the trolley and the hoist. The control device is configured such that the hanger frame that moves in and between the processing tanks always inclines at a predetermined angle forward or backward in the transport direction between the start and end points of the processing tank array. Provides a process electrodeposition coating device prior to and controls the hoist.
Further, in the present invention, one transport rail that extends from the start point to the end point of the processing tank array above the plurality of processing tanks arranged in series and a distance from each other in the extending direction of the transport rail. A pair of trolleys that engage with the conveyance rail, a carriage girder suspended from the trolley, a pair of hoists attached to the carriage girder at intervals in the extending direction of the conveyance rail, and a lifting chain of the pair of hoists In a plurality of processing tanks arranged in series using a tact type transport device comprising a hanger frame suspended at the lower end of the hanger, a hanger attached to the hanger frame, and a control device for controlling the trolley and hoist A treatment object transport method of a pretreatment electrodeposition coating apparatus for sequentially immersing a treatment object, and a hanger frame that moves between each treatment tank and between each treatment tank between the start point and the end point of the treatment tank array, Before transport direction Or provide backward either one of the treatment object conveying method pretreatment electrodeposition coating and wherein the tilting constantly at a predetermined angle.
In the present invention, the hanger frame that moves between the processing tanks and between the processing tanks is always inclined at a predetermined angle forward or backward in the transport direction between the start point and the end point of the processing tank array. Compared with the case where the hanger frame is swung forward and backward in the conveying direction in the processing tank and the hanger frame is held horizontally between the processing tank and the processing tank, the arrangement pitch of the hanger frame is made narrower. Can do. As a result, the number of treatments per unit time increases, and the operating efficiency of the pretreatment electrodeposition coating apparatus is improved.

In the present invention, one transport rail extending from the start point to the end point of the processing tank array above the plurality of processing tanks arranged in series, and transported at an interval in the extending direction of the transport rail A hanger that includes a trolley that engages with a rail and a hanger suspended from the trolley and moves between the treatment tanks and between the treatment tanks between a start point and an end point of the treatment tank array. Provided is a pretreatment electrodeposition coating apparatus that is always inclined forward or backward in the transport direction with respect to a transport rail.
Further, in the present invention, one transport rail that extends from the start point to the end point of the processing tank array above the plurality of processing tanks arranged in series and a distance from each other in the extending direction of the transport rail. A pretreatment electrodeposition coating apparatus for sequentially immersing a workpiece in a plurality of treatment tanks arranged in series using a continuous conveyance device including a trolley engaged with a conveyance rail and a hanger suspended from the trolley. The hanger that moves between the treatment tanks and between the treatment tanks between the start point and the end point of the treatment tank arrangement is either forward or backward in the conveyance direction with respect to the conveyance rail. An object of the present invention is to provide a method for transporting an object to be processed in a pretreatment electrodeposition coating apparatus, which is always inclined to one side.
In the present invention, between the start point and the end point of the processing tank array, the hanger that moves in each processing tank and between each processing tank is always inclined forward or backward in the transport direction with respect to the transport rail. Therefore, compared with the case where a hanger is hold | maintained in parallel with respect to a conveyance rail, the arrangement | positioning pitch of a hanger can be made narrow. As a result, the number of treatments per unit time increases, and the operating efficiency of the pretreatment electrodeposition coating apparatus is improved.

In the present invention, the hanger frame that moves between the processing tanks and between the processing tanks is always inclined at a predetermined angle forward or backward in the transport direction between the start point and the end point of the processing tank array. Compared with the case where the hanger frame is swung forward and backward in the conveying direction in the processing tank and the hanger frame is held horizontally between the processing tank and the processing tank, the arrangement pitch of the hanger frame is made narrower. Can do. As a result, the number of treatments per unit time increases, and the operating efficiency of the pretreatment electrodeposition coating apparatus is improved. Therefore, according to the present invention, there is provided a pretreatment electrodeposition coating apparatus provided with a tact type conveying apparatus having a higher operating efficiency than the conventional one, and a tact type conveying apparatus capable of increasing the operating efficiency of the pretreatment electrodeposition coating apparatus as compared with the conventional one. A method for conveying an object to be processed of a pretreatment electrodeposition coating apparatus to be used is provided.
In the present invention, the hanger that moves between the processing tanks and between the processing tanks between the start point and the end point of the processing tank array is always inclined forward or backward in the transport direction with respect to the transport rail. Therefore, the arrangement pitch of the hangers can be made narrower than in the case where the hangers are held parallel to the transport rail. As a result, the number of treatments per unit time increases, and the operating efficiency of the pretreatment electrodeposition coating apparatus is improved. As a result, the number of treatments per unit time increases, and the operating efficiency of the pretreatment electrodeposition coating apparatus is improved. Therefore, according to the present invention, there is provided a pretreatment electrodeposition coating apparatus provided with a continuous conveyance apparatus having a higher operating efficiency than the conventional one, and a continuous conveyance apparatus capable of improving the operation efficiency of the pretreatment electrodeposition coating apparatus as compared with the conventional one. A method for conveying an object to be processed of a pretreatment electrodeposition coating apparatus to be used is provided.

Examples of the present invention will be described.

A pretreatment electrodeposition coating apparatus according to a first embodiment of the present invention and a method for conveying an object to be processed of the pretreatment electrodeposition coating apparatus will be described.

In the following description, the directions of arrows I, II, III, IV, V, and VI in FIGS. 1 to 3 are respectively referred to as front, rear, left, right, upper, and lower.
As shown in FIG. 1, the pretreatment electrodeposition coating apparatus A includes a preliminary hot water washing tank 1, a degreasing tank 2, a first water washing tank 3, a surface adjustment tank 4, which are sequentially arranged in series from the rear to the front. Chemical conversion tank 5, second water washing tank 6, third water washing tank 7, first pure water water washing tank 8, work table 9, electrodeposition coating tank 10, first UF water washing tank 11, second UF water washing tank 12, 3UF water washing tank 13 The second pure water rinsing tank 14 is provided. A loading stage 15 is disposed behind the preliminary hot water washing tank 1, and a dropping stage 16 is arranged in front of the second pure water washing tank 14.
The degreasing tank 2, the surface conditioning tank 4, the chemical conversion tank 5, the second water washing tank 6, the first pure water washing tank 8, the electrodeposition coating tank 10, the second UF water washing tank 12, and the second pure water washing tank 14 are used as immersion tanks. It is configured.
The preliminary hot water washing tank 1, the first water washing tank 3, the third water washing tank 7, the first UF water washing tank 11, and the third UF water washing tank 13 are configured as a storage and circulation tank of the used processing liquid that has been sprayed.
The automobile body α placed on the skid B is placed on a cart (not shown) and conveyed from a welding factory (not shown) to the pretreatment electrodeposition coating apparatus A, and is unloaded from the carriage on the loading stage 15, and the hanger of the tact type conveyor C 50. The automobile body α is sequentially transported to each tank by the tact type transport device C and processed, and then is unloaded from the hanger 50 of the tact type transport device C at the unloading stage 16 and placed on a cart (not shown). It is conveyed to a baking / drying device.

The structure of the tact type transfer device C will be described with reference to FIGS.
One conveyance rail 20 extending horizontally in the front-rear direction is disposed above the processing tank. A pair of guide rails 21 a and 21 b extending in parallel with the transport rail 20 are disposed on the left and right sides of the transport rail 20. A pair of trolleys 22a and 22b are engaged with the transport rail 20 at a distance from each other in the front-rear direction.
A cart frame 23 formed of a rectangular frame as viewed in the vertical direction is suspended from the trolleys 22a and 22b. A pair of guide rollers 24a and 24b attached to the carriage frame 23 on both the left and right sides of the transport rail 20 are engaged with the guide rails 21a and 21b, respectively. Collision-preventing front trolleys 22c and rear trolleys 22d connected to the trolleys 22a and 22b via rod members are engaged with the transport rails 20 in front of the trolleys 22a and behind the trolleys 22b, respectively. A pair of hoists 25a and 25b are attached to the bogie frame 23 at a distance from each other in the front-rear direction. A sequence controller 26 for controlling the trolleys 22a and 22b and the hoists 25a and 25b is attached to the carriage frame 23.

Two beams 30a and 30b having the same length intersecting in an X shape when viewed in the left-right direction are disposed on the right side of the transport rail 20 below the carriage frame 23, and in the left-right direction below the beams 30a and 30b. , Two beams 30c and 30d having the same length intersecting in an X shape are disposed.
The right ends of the shafts 31 and 32 extending to the left and right pass through the intersections of the beams 30a and 30b and the intersections of the beams 30c and 30d, respectively, so as to allow only sliding rotation. The right ends of the shafts 33 and 34 extending to the left and right pass through the lower end of the beam 30a and the upper end of the beam 30d, and the lower end of the beam 30b and the upper end of the beam 30c, respectively, so that only sliding rotation is possible. A portion near the right end of the shaft 35 extending to the left and right passes through the upper end of the beam 30a so as to allow only sliding rotation. The right end of the shaft 35 is connected to the lower front part of the carriage frame 23 so as to be movable back and forth only within a predetermined region. The portion near the right end of the shaft 36 that extends to the left and right passes through the upper end of the beam 30b so as to allow only sliding rotation. The right end of the shaft 36 is connected to the lower rear end of the carriage frame 23. A portion near the right end of the shaft 37 extending to the left and right passes through the lower end of the beam 30d so as to allow only sliding rotation. The right end of the shaft 37 is formed of a rectangular frame when viewed in the vertical direction, and is connected to the front upper portion of the lower end frame 39 disposed in parallel with the carriage frame 23 so as to be movable back and forth only within a predetermined region. A portion near the right end of the shaft 38 that extends to the left and right passes through the lower end of the beam 30c so as to allow only sliding rotation. The right end of the shaft 38 is connected to the upper rear end of the lower end frame 39.

  Beams 40a to 40d are arranged in plane symmetry with the beams 30a to 30d on the left side of the transport rail 20 and below the carriage frame 23. The beams 40a to 40d are penetrated by the left end portions of the shafts 31 to 38 in the same manner as the beams 30a to 30d, and are connected to the carriage frame 23 and the lower end frame 39 similarly to the beams 30a to 30d.

  As can be seen from the above description, the beams 30a to 30d and 40a to 40d have joint joints, and can be expanded and contracted to form the lower half of the rhombus at the upper part, the rhombus at the center, and the upper half of the rhombus at the lower part when viewed in the left-right direction. A pair of frames, that is, a pair of pantographs 30 and 40 that can expand and contract in the vertical direction is configured. The upper ends of the pantographs 30 and 40 are connected to the carriage frame 23 via joint joints, and the lower ends of the pantographs 30 and 40 are connected to a lower end frame 39 disposed in parallel to the carriage frame 23 via joint joints. The joint joints of the pantographs 30 and 40 and the joint joints connecting the upper and lower ends of the pantographs 30 and 40 to the carriage frame 23 and the lower end frame 39, respectively, allow only the rotation about the axis extending in the left and right direction. . The joint joints that face the pantographs 30 and 40 are connected by shafts 31 to 34 in a manner that restricts relative displacement.

  The rear end of the first inclined hanger frame 41 formed of a rectangular frame when viewed in the vertical direction is connected to the lower rear portion of the lower end frame 39 via an articulated joint that allows only rotation around an axis extending in the left-right direction. ing. The front end of the second inclined hanger frame 42 formed of a rectangular frame when viewed in the vertical direction is connected to the lower portion of the front end of the first inclined hanger frame 41 via an articulated joint that allows only rotation around an axis extending in the left-right direction. It is connected. The lower end of the lifting chain 25a 'of the hoist 25a is connected to the front part of the second inclined hanger frame 42, and the lower end of the lifting chain 25b' of the hoist 25b is connected to the rear part of the second inclined hanger frame 42.

  A pair of portal beams 50a and 50b arranged at intervals in the front-rear direction, and a portal beam 50a via an articulated joint that allows only rotation about an axis in which the front end and the rear end extend to the left and right, respectively. The beam 50a connected to the right foot and the right foot of the portal beam 50b, and the joint beam 50a via an articulated joint that allows only the rotation about the axis whose front end and rear end extend to the left and right respectively. A hanger 50 comprising a beam 50d connected to the left foot of the gantry beam 50b and the left foot of the portal beam 50b is connected to the second inclined hanger via an articulated joint that allows only a rotation about an axis extending in the left-right direction. It is suspended from the frame 42.

A large number of transport units including a pair of trolleys 22a, 22b to hangers 50 are engaged with the transport rail 20 at a predetermined pitch.

  In the tact type transfer device C having the above-described configuration, the trolleys 22a and 22b that suspend the carriage frame 23 are controlled by the sequence controller 26, so that a pair of pantographs 30 and 40 that are connected to the carriage frame 23 and extend downward. A lower end frame 39 connected to the lower end of the pantograph, a first inclined hanger frame 41 connected to the lower end frame 39, and a second inclined hanger frame 42 connected to the first inclined hanger frame 41. The three-dimensional truss travels along the transport rail 20 and starts and stops, and accordingly, the hanger 50 connected to the second inclined hanger frame 42 travels along the transport rail 20 and starts and stops.

  The hoists 25a and 25b are simultaneously and identically controlled by the sequence controller 26, and the vertical chains 25a 'and 25b' are simultaneously fed out or pulled up, so that the vertical distance between the carriage frame 23 and the lower end frame 39 is minimized. While the lower end frame 39 is kept parallel to the carriage frame 23 between the contracted position and the maximum extended position where the vertical distance between the carriage frame 23 and the lower end frame 39 is maximum, the pantographs 30 and 40 are moved up and down. Accordingly, the hanger 50 moves up and down while maintaining the horizontal state.

When only the lifting / lowering chain 25a ′ of the hoist 25a is drawn out by the sequence controller 26, the second inclined hanger frame 42 is integrated with the first inclined hanger frame 41 as shown by the solid line in FIG. It rotates about the joint joint which connects 41 and the lower end frame 39, and the front end of the 2nd inclination hanger frame 42 descends. On the other hand, when only the lifting / lowering chain 25b ′ of the hoist 25b is drawn out by the sequence controller 26, only the second inclined hanger frame 42 and the first inclined hanger frame 41 and the second inclined hanger are shown in FIG. It rotates around the joint joint connecting the frame 42, and the rear end of the second inclined hanger frame 42 is lowered. Accordingly, the hoists 25a and 25b are individually controlled by the sequence controller 26, and the elevating chains 25a 'and 25b' are individually fed out, whereby the second inclined hanger frame 42 and thus the hanger 50 are tilted back and forth.

The operation of the pretreatment electrodeposition coating apparatus A will be described.
By the sequence controller 26 attached to the carriage frame 23, each hanger 50 is automatically run and moved up and down independently.
As shown in FIG. 1, in the loading stage 15, the pantographs 30 and 40 extend to the maximum extension position while keeping the lower end frame 39 parallel to the carriage frame 23, and the hanger 50 tilts both forward and backward. It is not horizontally positioned. On the hanger 50 positioned horizontally, the skid B on which the automobile body α is placed is placed on a dolly (not shown) and conveyed from a welding factory (not shown) to the pretreatment electrodeposition coating apparatus A.
After the skid B on which the automobile body α is placed on the hanger 50 is loaded, the pantographs 30 and 40 are contracted to the contracted position while keeping the lower end frame 39 parallel to the carriage frame 23. Only the raising / lowering chain 25a ′ of the hoist 25a is fed out by a predetermined amount, and the second inclined hanger frame 42, and by extension, the hanger 50 is inclined forward. The second inclined hanger frame 42 and thus the hanger 50 cannot form an air pocket in the automobile body α immersed in the treatment liquid in the immersion tank, and adheres to the surface of the automobile body α when leaving the treatment tank. The liquid is inclined at a predetermined angle that minimizes the processing liquid to be taken out.
The hanger 50 starts traveling forward in a state where it is inclined forward at the predetermined angle.

  Degreasing tank 2 configured as an immersion tank, surface conditioning tank 4, chemical conversion tank 5, second water washing tank 6, first pure water washing tank 8, electrodeposition coating tank 10, second UF water washing tank 12, and second pure water washing The hanger 50 stops traveling above the tank 14 and descends into the tank while being inclined forward at the predetermined angle, and the automobile body α is immersed in the processing liquid and processed. In the degreasing tank 2 and the electrodeposition coating tank 10 that require a long immersion treatment time, the hanger 50 moves forward while the automobile body α is immersed and inclined forward at the predetermined angle. Next, the hanger 50 rises while tilting forward at the predetermined angle and exits from the immersion tank.

  The hanger 50 stops traveling above the preliminary hot water washing tank 1, the first water washing tank 3, the third water washing tank 7, the first UF water washing tank 11, and the third UF water washing tank 13, and the tank remains inclined forward at the predetermined angle. The processing liquid is sprayed onto the automobile body α through the spray. The used processing liquid flows into the lower processing liquid tank and is circulated and reused. Some of these processing liquids are sequentially fed for the previous processing.

Between each processing tank, the hanger 50 moves while tilting forward at the predetermined angle.
When the hanger 50 leaves the second pure water rinsing tank 14 and reaches the coin drop stage 16, only the lifting / lowering chain 25a 'of the hoist 25a is pulled up by a predetermined amount, and the hanger 50 that has been inclined forward becomes horizontal. Return.
The pantographs 30 and 40 extend to the maximum extension position while keeping the lower end frame 39 parallel to the carriage frame 23. The skid B carrying the vehicle body α is unloaded from the hanger 50 positioned horizontally. The skid B on which the automobile body α is placed is placed on a cart (not shown) and conveyed to a baking / drying device (not shown). The hanger 50 from which the skid B is removed is forwarded to the loading stage 15, and the skid B on which the automobile body α is placed is loaded on the hanger 50.

In the tact type transfer device C, the second inclined hanger frame 42 and thus the hanger 50 are moved forward in the transfer direction between the loading stage 15 as the starting point of the processing tank array and the unloading stage 16 as the end point of the processing tank array. Therefore, the second inclined hanger frame 42 and thus the hanger 50 in the processing tank are swung forward and backward in the conveying direction, and the second inclined hanger frame 42 is moved between the processing tank and the processing tank. As a result, as compared with the case where the hanger 50 is held horizontally, the second inclined hanger frame 42 and thus the arrangement pitch of the hanger 50 can be narrowed. As a result, the number of automobile bodies α transported per unit time is increased, and the operating efficiency of the pretreatment electrodeposition coating apparatus A is improved. In addition, since the predetermined angle is an angle that minimizes the processing liquid adhering to the surface of the automobile body α when leaving the processing tank, the time for running out of liquid in each processing tank is shortened, and the pretreatment electrodeposition coating apparatus The operating efficiency of A is further improved.

In the tact type transfer device C, the second inclined hanger frame 42 and the hanger 50 are inclined at an angle at which the air pocket cannot be formed in the automobile body α immersed in the processing liquid in the immersion tank. There is no unprocessed part left.

  Instead of always inclining the second inclined hanger frame 42 and thus the hanger 50 forward in the conveying direction, the second inclined hanger frame 42 and eventually the hanger 50 are immersed in the treatment liquid in the immersion tank at the rear in the conveying direction. In addition, an air pocket may not be formed in the automobile body α, and the liquid may be always inclined at a predetermined angle at which the treatment liquid adhering to the surface of the automobile body α and taking out when leaving the treatment tank is minimized.

Instead of arranging the treatment tanks in a straight line as shown in FIG.
The transport rail 20 is formed in an annular shape in order to return the trolleys 22a and 22b that have moved to the drop-off stage 16 that is the end point of the processing tank array to the loading stage 15 that is the start point of the processing tank array. Therefore, if the processing tanks are arranged annularly along the annular transport rail 20, the length of the processing tank building can be shortened, and the pretreatment electrodeposition coating apparatus A can be miniaturized.

  The tact type transfer device is not limited to the tact type transfer device C. As shown in FIGS. 4 and 5, one transport rail 100 disposed above the processing tank, and a pair of trolleys 101 engaged with the transport rail 100 at intervals in the extending direction of the transport rail 100. A carriage girder 102 suspended from the trolley 101, a pair of hoists 103 attached to the carriage girder 102 at intervals in the extending direction of the transport rail 100, and lower ends of the lifting chains 104 of the pair of hoists 103 A general tact type transfer device including a hanger frame 105 suspended on the hanger, a hanger 106 attached to the hanger frame 105, and a control device (not shown) for controlling the trolley 101 and the hoist 103 may be used.

The trolley 101 and the hoist 103 are controlled, and the hanger 106 loaded with the skid B carrying the automobile body α travels along the transport rail 100 and starts and stops. When the pair of hoists 103 are operated simultaneously and the pair of elevating chains 104 are fed out or pulled up simultaneously, the hanger 106 moves up and down while maintaining a horizontal state. When either one of the hoists 103 is operated and either one of the lifting / lowering chains 104 is extended, the hanger 106 is inclined forward or backward in the traveling direction.

By always inclining the hanger 106 forward or backward in the conveying direction between the loading stage 15 which is the starting point of the processing tank array and the falling stage 16 which is the end point of the processing tank array, the arrangement pitch of the hanger 106 is increased. Can be narrowed. As a result, the number of automobile bodies α transported per unit time is increased, and the operating efficiency of the pretreatment electrodeposition coating apparatus A is improved.

A pretreatment electrodeposition coating apparatus according to a second embodiment of the present invention and a method for conveying an object to be processed by the pretreatment electrodeposition coating apparatus will be described.

In the following description, the directions of arrows I, II, III, and IV in FIG. 6 are respectively referred to as front, rear, upper, and lower.
As shown in FIG. 6, the pretreatment electrodeposition coating apparatus A ′ includes a preliminary hot water washing tank 61, a degreasing tank 62, a first water washing tank 63, and a surface adjustment tank 64, which are sequentially arranged in series from the rear to the front. , A chemical conversion tank 65, a second water washing tank 66, a first pure water washing tank 67, a work table 68, an electrodeposition coating tank 69, a UF water washing tank 70, and a second pure water washing tank 71. A loading stage (not shown) is arranged behind the preliminary hot water washing tank 61, and a dropping stage (not shown) is arranged in front of the second pure water washing tank 71. Each processing tank is configured as an immersion tank.
One conveyance rail 80 extending in the front-rear direction is disposed above the processing tank. The conveyance rail 80 extends horizontally between the processing tanks, and is curved downward toward the lower processing tank above the processing tank. A number of trolleys that are arranged at intervals in the extending direction of the transport rails 80 and are driven by an endless chain (not shown) are engaged with the transport rails 80, and hangers 81 are suspended from the trolleys. The hanger 81 is suspended from the trolley in a state where the hanger 81 is always inclined rearward in the transport direction with respect to the transport rail 80. The conveyor rail 80, the trolley, the endless chain, the endless chain driving device, and the hanger 81 constitute a continuous conveyor C ′.

The vehicle body α placed on the skid B ′ is placed on a cart (not shown) and conveyed from a welding plant (not shown) to the pretreatment electrodeposition coating apparatus A ′, and is unloaded from the carriage on the loading stage and continuously conveyed C ′. On the hanger 81. The car body α is sequentially transferred to each processing tank by the continuous transfer device C ′ and immersed or sprayed, and then unloaded from the hanger 81 of the continuous transfer device C ′ at the unloading stage. And is conveyed to a baking drying apparatus (not shown).
In the pretreatment electrodeposition coating apparatus A ′, the hanger 81 that moves between the treatment tanks and between the treatment tanks is always inclined backward in the conveyance direction with respect to the conveyance rail 80 between the start and end points of the treatment tank arrangement. Therefore, the arrangement pitch of the hangers can be made narrower than in the case where the hangers are held parallel to the transport rail. As a result, the number of treatments per unit time increases, and the operating efficiency of the pretreatment electrodeposition coating apparatus is improved.
Instead of always inclining the hanger 81 rearward in the transport direction with respect to the transport rail 80, the hanger 51 may be always tilted forward in the transport direction with respect to the transport rail 80.

INDUSTRIAL APPLICABILITY The present invention is widely applicable to a pretreatment electrodeposition coating apparatus provided with a tact type conveying apparatus and a continuous type conveying apparatus, and a workpiece conveying method of a pretreatment electrodeposition coating apparatus using the tact type conveying apparatus and the continuous type conveying apparatus. It is.

It is a figure which shows the whole arrangement | positioning of the pretreatment electrodeposition coating apparatus which concerns on 1st Example of this invention. It is a side view of a tact type conveyance device with which a pretreatment electrodeposition coating device is provided in the first embodiment of the present invention. FIG. 3 is an XX arrow view of FIG. 2. It is a side view of the modification of a tact type conveying apparatus. It is a YY arrow line view of FIG. It is a figure which shows the whole arrangement | positioning of the pretreatment electrodeposition coating apparatus which concerns on 2nd Example of this invention.

Explanation of symbols

A A ′ pretreatment electrodeposition coating apparatus C tact type conveying apparatus C ′ continuous conveying apparatus 20, 100, 80 conveying rails 21a, 21b guide rails 22a, 22b, 101 trolleys 23, 102 bogie frames 24a, 24b guide rollers 25a, 25b, 103 Hoist 25a ', 25b', 104 Lifting chain 26 Sequence controller 30a, 30b, 30c, 30d Beam 40a, 40b, 40c, 40d Beam 30, 40 Pantograph 31, 32, 33, 34, 35, 36, 37, 38 Shaft 39 Lower end frame 41 First inclined hanger frame 42 Second inclined hanger frame 50, 106, 81 Hanger 105 Hanger frame

Claims (4)

One transport rail extending from the start point to the end point of the processing bath array above the plurality of processing baths arranged in series, and the transport rail is engaged with the transport rail at an interval in the extending direction of the transport rail. A pair of trolleys, a carriage girder suspended on the trolley, a pair of hoists attached to the carriage girder at intervals in the extending direction of the transport rail, and suspended at the lower ends of the lifting chains of the pair of hoists A tact type transfer device having a hanger frame, a hanger attached to the hanger frame, and a control device for controlling the trolley and the hoist. The pre-processing is characterized in that the hoist is controlled so that the hanger frame that moves between the processing tanks and between the processing tanks is always inclined at a predetermined angle either forward or backward in the transport direction. Wear coating apparatus. One transport rail extending from the start point to the end point of the processing bath array above the plurality of processing baths arranged in series, and the transport rail is engaged with the transport rail at an interval in the extending direction of the transport rail. A pair of trolleys, a carriage girder suspended on the trolley, a pair of hoists attached to the carriage girder at intervals in the extending direction of the transport rail, and suspended at the lower ends of the lifting chains of the pair of hoists Using a tact-type transfer device equipped with a hanger frame, a hanger attached to the hanger frame, and a control device for controlling the trolley and hoist, the workpieces are sequentially immersed in a plurality of processing tanks arranged in series. A pretreatment electrodeposition coating apparatus for carrying an object to be treated, wherein a hanger frame that moves in and between each treatment tank between a start point and an end point of the treatment tank arrangement is forward or backward in the transfer direction. Either Treatment object conveying method pretreatment electrodeposition coating and wherein the tilting constantly at a predetermined angle. One transport rail extending from the start point to the end point of the processing bath array above the plurality of processing baths arranged in series, and the transport rail is engaged with the transport rail at an interval in the extending direction of the transport rail. A continuous conveyance device having a trolley and a hanger suspended from the trolley, and a hanger that moves between each treatment tank and between each treatment tank between the start point and the end point of the treatment tank arrangement with respect to the conveyance rail A pretreatment electrodeposition coating apparatus, which is always inclined forward or backward in the conveying direction. One transport rail extending from the start point to the end point of the processing bath array above the plurality of processing baths arranged in series, and the transport rail is engaged with the transport rail at an interval in the extending direction of the transport rail. Using a continuous conveying device comprising a trolley and a hanger suspended from the trolley, a method of conveying a workpiece in a pretreatment electrodeposition coating apparatus that sequentially immerses the workpiece in a plurality of treatment tanks arranged in series Then, between the start point and the end point of the processing tank arrangement, the hanger that moves in each processing tank and between each processing tank is always inclined forward or backward in the transport direction with respect to the transport rail. A method for transporting an object to be processed in a pretreatment electrodeposition coating apparatus.

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