JPH108292A - Surface treating device and surface treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiency execute a surface treatment with good finish quality by preventing the generation of air pockets with all the objects to be treated regardless of the shapes of the objects to be treated. SOLUTION: A car body in a horizontal hanging state is passed through a first position, by which this body is turned. The car body is admitted into a vessel in a vertically hanging state in a second position 82 (car body 14A). The car body is turned 180 deg. in a range from the second position 82 which is the inside of the treating vessel 12 to a third position 84 (car bodies 14B, 14C, 14D, 14E, 14F). The car body is turned to the vertical hanging state in the third position 84.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface treatment apparatus and a surface treatment method for performing surface treatment by immersing an object to be treated in a treatment tank.

[0002]

2. Description of the Related Art As shown in FIG. 13, for example, electrodeposition coating of a large member such as a car body is carried while a body 502 to be processed is immersed in a processing tank 500 filled with a processing solution. And go. In this method, the vehicle body 5
02 is hung as it is with the hanger 504 (horizontally suspended),
While transporting using the overhead conveyor 506,
It is immersed in the processing tank 500 provided on the transport path. Accordingly, since the entire body 502 can be immersed in the processing liquid, there is an advantage that processing can be performed quickly without processing unevenness.

However, in the above-mentioned horizontal suspension method, air easily accumulates on the roof, the back of the hood, or the like, and so-called air pockets are easily generated. For this reason, there is a problem that it is difficult to maintain the quality due to the bubble marks in the air pocket. Also,
Since the outlet angle is shallow, dirt and lumps adhere to it, and processing unevenness is likely to occur.Moreover, since the outlet angle is shallow, a large amount of processing liquid is taken out when the tank is discharged, so that there is much waste of the processing liquid. In addition, there is a problem that a large process space is required.

[0004] In order to improve this, it has been proposed that the vehicle be immersed in a treatment tank and the vehicle body be rotated about a horizontal axis (for example, see Japanese Utility Model Laid-Open No. 4-21559). By turning the vehicle body, air pockets are less likely to be generated, and processing unevenness due to foam marks can be suppressed. However, since the vehicle body is lowered and immersed in a horizontal state with respect to the processing tank, the resistance when ascending and descending is large.

Therefore, a vertical suspension method as shown in FIG. 14 has been proposed. In the vertical suspension method, the vehicle body 602 is vertically suspended via a fixing portion 605 connected to the hoist 604,
The vehicle body 602 is transported by moving the hoist 604 along the rail of the overhead conveyor 607. The hoist 604 can be transported by running the hoist. When the hoist 604 reaches the processing tank, the chain 606 is extended by driving a motor, and the fixed portion 605 is moved to the processing tank 600.
Lower toward. Thereby, the vehicle body 602 is immersed, and as a result, the amount of the processing liquid taken out at the time of leaving the tank can be reduced.

However, in the vertical suspension method, the occurrence of air pockets on the roof and the back of the hood, which has been a problem in the horizontal suspension method, can be eliminated, but the occurrence of air pockets in other parts due to the shape of the vehicle body can be eliminated. It has the disadvantage that it cannot be ruled out.

[0007]

Therefore, it is necessary to study the structure of the vehicle body in order to completely eliminate the occurrence of air pockets regardless of whether the method is the vertical suspension method or the horizontal suspension method. Yes, if you make a model change,
There is a problem that a process such as an electrodeposition turning test, an evaluation, a facility change, a study, and the like are required, and it takes time and effort.

The present invention has been made in view of the above facts, and eliminates the generation of bubble marks caused by air pockets in all surface treatment objects regardless of the shape of the surface treatment object.
It is an object of the present invention to provide a surface treatment apparatus and a surface treatment method having a good finish quality and capable of achieving efficient surface treatment.

[0009]

According to a first aspect of the present invention, there is provided a surface treatment apparatus provided with a holding table for holding an object to be surface-treated, hanging means for hanging the holding table, and the hanging means, Rotating means for rotating the holding table, holding table moving means for moving the hanging means up and down to move in and out of the tank, and transport means for transporting the holding table moving means along a transport path. And

According to the first aspect of the present invention, since the holding table can be rotated by the rotating means, the holding table is rotated when entering the processing tank by, for example, an operation by an operator. It is possible to enter the tank in a vertically suspended state in which the longitudinal direction of the surface treatment product is the longitudinal direction, rotate the inside of the treatment tank, and leave the tank in the vertically suspended state when leaving the tank. By rotating in the processing tank, it is possible to eliminate the occurrence of air pockets due to the shape of the surface-treated object. In addition, since the tank is vertically suspended, the resistance to the liquid level at the time of entering and exiting the tank can be reduced, and the amount of the processing liquid carried out together with the surface-treated material at the time of exiting the tank can be significantly reduced. Therefore, irrespective of the shape of the object to be treated, generation of bubbles due to air pockets can be eliminated in all the objects to be treated, and efficient surface treatment with good finish quality can be performed.

[0011] The surface treatment apparatus according to the second aspect is the first aspect.
And a first detection means provided in the middle of the conveyance path for detecting a tank entry position of the holding table; and stopping the conveyance means based on a signal from the first detection means to rotate the rotating means. The tank is moved so that the longitudinal direction of the surface-treated object held by the holding table is entered into the vertical direction, the holding table is rotated, and the longitudinal direction of the surface-treated object is exited in the longitudinal direction. And control means.

According to the second aspect of the present invention, the rotation control means stops the conveyance of the holding table at the tank entry position, enters the object to be treated in a vertically suspended state, rotates after entering the tank, and rotates vertically. Since the tank is discharged in a suspended state, it is possible to reliably enter and leave the layer with a small resistance force, and it is possible to further greatly reduce the amount of the processing liquid taken out together with the surface-treated material at the time of leaving the tank. Further, since the input / output tank can be executed only by the first detection means and the rotation in the processing tank can be executed, the processing can be automatically performed efficiently with a small number of parts.

According to a third aspect of the present invention, there is provided a surface treatment apparatus.
In the first, a first detecting means provided in the middle of the transfer path and detects the tank entry position of the holding table, a second detection means provided in the middle of the transfer path and detects the exit position of the holding table, The rotating means is rotated based on a signal from the first detecting means, and the longitudinal direction of the object to be processed held by the holding table is entered in the vertical direction, and the holding table is rotated. Rotation control means for discharging a tank with the longitudinal direction of the surface-treated object as a vertical direction based on a signal from the second detection means, and rotation of the rotation control means continues to be carried by the holding means. And conveyance control means for performing the operation while executing.

According to the third aspect of the present invention, after entering the tank in a vertically suspended state by the transfer control means, the object to be surface-treated is moved in the treatment tank by the transfer means from the entry tank to the exit tank. While rotating the rotating means, the tank can be discharged in the vertically suspended state at the discharge position. This makes it possible to automatically perform the input / output tank in the vertically suspended state and the rotation inside the processing tank. In addition, since the conveyance is continued even during the rotation, the processing can be continued without stopping the conveyance, and the surface treatment of a plurality of surface processing objects can be continuously performed without requiring a complicated mechanism. .

According to a fourth aspect of the present invention, there is provided a surface treatment apparatus.
In any one of (3) to (3), the holding table is moved in a direction orthogonal to a moving direction of the adjusting member, the adjusting member being movable in a longitudinal direction of the workpiece to be processed placed on the holding table. A holding member that is provided so as to be capable of holding a holding portion of the surface treatment target placed on the adjustment member.

According to the fourth aspect of the present invention, since the movable adjusting member and the holding member for holding a part of the object to be processed are provided on the holding table, the adjusting member can be aligned with the holding position of the object to be processed. By moving the adjusting member, the object to be surface-treated can be reliably held on the holding table by the holding member. As a result, even if the shape of the workpiece is changed, the holding member can be moved in accordance with the set holding position, so that the workpiece can be held on the holding table regardless of the shape of the workpiece. can do.

The surface treatment apparatus according to the fifth aspect is the first aspect.
In any one of (1) to (4), the rotation unit may include a rotation shaft that rotatably supports the holding table with respect to the suspension unit, a sprocket provided coaxially with the rotation shaft, A drive source provided at an upper end portion, a chain that transmits a rotational force of the drive source to the sprocket, and a drive control unit that controls a drive amount of the drive source and rotates the holding table to a predetermined angle. , Is characterized by.

According to the fifth aspect of the present invention, the driving source is driven by a predetermined amount by the driving control means, so that the sprocket is rotated via the chain and the holding table is rotated together with the rotating shaft. The table can be turned.
In addition, by disposing the driving source at the upper end of the suspending means, the driving source is immersed in the processing liquid even when the holding table is immersed in the processing liquid even when immersed in the processing liquid from the lower end of the hanging means. And the drive source is not affected by the processing liquid. Further, by making the chain a material that does not react with the processing liquid, for example, a resin, it is possible to prevent the deterioration of the chain due to the processing and the adhesion of the paint.

According to a sixth aspect of the present invention, there is provided a surface treatment method, wherein the object to be treated is suspended in a treatment tank filled with a surface treatment liquid while the object to be treated is suspended and transported on a transport path. In the surface treatment method of performing surface treatment by immersing in a liquid,
With respect to the treatment tank, the longitudinal direction of the object to be treated is entered with the longitudinal direction as a vertical direction, and inside the treatment tank, the object to be treated immersed in a treatment liquid is rotated, and In this case, the tank is discharged with the longitudinal direction of the surface-treated object as a vertical direction.

According to the sixth aspect of the present invention, the surface-treated object enters the tank in a so-called vertically suspended state, rotates in the processing tank, and leaves the tank in the vertically suspended state. , The drainage property can be improved, and the carry-out amount of the processing liquid can be reduced. In addition, it is possible to eliminate the occurrence of air pockets due to the shape of the object to be processed by rotating in the processing tank.
Here, by making the rotation in the processing tank a rotation of, for example, 180 °, the object to be treated held on the holding table does not turn upside down, and the object to be surface treated can be easily held. it can.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] A first embodiment of the present invention will be described below with reference to the drawings by taking as an example a case where the present invention is applied to a coating process of a vehicle body, particularly an electrodeposition (undercoat) process.

FIG. 1 shows a processing apparatus 10 for electrodeposition processing to which the present invention can be applied. The processing apparatus 10 includes a processing tank 12 filled with an electrodeposition paint, and a conveyor 16 is provided above the processing tank 12. The conveyor 16 conveys the vehicle body 14 for performing surface treatment in the processing tank 12 in a direction indicated by an arrow A in FIG.

An electrode (not shown) is provided on the side wall of the processing tank 12 to positively charge the processing liquid. On the other hand, a current collecting bar (not shown) is provided on a free rail 94 described later, and the vehicle body 14 to be processed is negatively charged. As a result, the vehicle body 1
Electrodeposition coating is performed on 4.

The rails 18 of the conveyor 16 have a body 14
The hanger 20 which supports is suspended.

As shown in FIG. 2A, the hanger 20
Is provided with a base 24 for mounting the vehicle body 14 and a hanger arm 22 for holding the base.

As shown in FIGS. 2A and 2B,
A trolley 26 is accommodated inside the conveyor 16. The trolley 26 is connected to a support 28 via a shaft 26A, and the trolley 26 moves inside the conveyor 16 to convey the support 28 along the rail 18 of the conveyor 16.

The hanger arm 22 is connected to the support 28 via one end of a shaft 30 whose longitudinal direction is the vertical direction.

The hanger arm 22 includes a horizontal portion 22A extending horizontally with respect to the rail 18, and a hanging portion 22B extending vertically downward. A base 24 on which the vehicle body 14 is mounted is attached to the tip of the hanging portion 22B.

As shown in FIG. 3, the base 24 is composed of a rectangular frame 32 and a pair of fixing members 34. The connection position between the frame 32 and the hanger arm 22 is configured to coincide with the position of the center of gravity of the vehicle body 14 when the vehicle body 14 is mounted on the base 24.

The fixing member 34 is a rectangular member whose longitudinal direction is the width direction (the direction of the arrow W) of the frame 32. Support shafts 36 are provided at both ends of the fixing member 34 in the longitudinal direction. . The frame 32 is provided with an oval adjustment hole 38 along the longitudinal direction (the direction of the arrow L), and the support shaft 36 is movably inserted along the adjustment hole 38. On the inner peripheral surface of the adjustment hole 38, a rack portion 40 having an uneven surface is provided, and meshes with a gear portion 36A formed on the outer peripheral surface of the support shaft 36. Thereby, the support shaft 3
6 is fixed, and after being positioned according to the length of the vehicle body 14, it can be fixed.

On the upper surface of the fixing member 34, a guide groove 42 is provided along the longitudinal direction of the fixing member 34, and the guide groove 42 holds a part of the vehicle body 14 mounted on the base 24. The bases of a pair of wedge-shaped chucks 44 are inserted.

A moving mechanism (not shown) for the chuck 44 is accommodated inside the fixing member 34 so as to move the chuck 44 along the guide groove 42. Thus, the position of the chuck 44 is adjusted and fixed, a part of the vehicle body 14 is pinched, and moved in the separating direction to release the holding state.

As shown in FIG. 4, when the vehicle body 14 is mounted on the base 24, a mounting device 48 having an arm 48A is used. The base 24 is located below the arm 48A.
The chucking lock device 50 is disposed between the two.

The chucking lock device 50 is provided with a claw 52 for driving a moving mechanism of the chuck 44 in accordance with a fixed position of the mounted vehicle body 14. When the vehicle body 14 is placed on the base 24, the claw 52
To adjust the position of the chuck 44 (in the direction of arrow W in FIG. 3). Further, the position of the fixing member 34 is adjusted by connecting to a moving mechanism (not shown) of the chuck 44 provided inside the fixing member 34 (in the direction of arrow L in FIG. 3). In the chucking lock device 50, a fixed portion determined in advance based on the shape (vehicle type) of the vehicle body 14 is stored, and the chuck 44 is moved in accordance with the vehicle body 14 to be processed.

As shown in FIG. 2B, a rotary drive motor 54 is disposed on the horizontal portion 22A of the hanger arm 22. Inside the rotary drive motor 54, a motor body and a speed reducer (both not shown) connected to the motor body are hermetically housed. This prevents paint from adhering to the motor body and the speed reducer. The reduction gear is configured to reduce the rotation speed based on the driving of the motor body to an appropriate rotation speed. A sprocket 58 is attached to a drive shaft 56 of the rotary drive motor 54. The rotary drive motor 54 is connected to a controller 68 (see FIG. 5), and is driven and stopped based on an instruction from the controller 68.

An encoder 66 is connected to the other end of the rotary drive motor 54. The encoder 66 converts the rotation speed of the rotation drive motor 54 into a pulse signal. A controller 68 (see FIG. 5) is connected to the encoder 66, and a pulse signal from the encoder 66 is input to the controller 68. The controller 68 can detect the rotation speed of the rotary drive motor 54 based on the pulse signal.

On the other hand, the hanger arm 22
A rotation shaft 60 is provided at a connecting portion with the rotation shaft 60. A resin chain 62 is wound around a sprocket 61 attached to the rotating shaft 60 and a sprocket 58 attached to the rotation drive motor 54. Thus, when the drive motor 54 is driven to rotate the sprocket 58, the rotating shaft 60 rotates together with the sprocket 61.

As shown in FIG. 3, the frame 32 is connected to the power supply sealing device 64 at the end of the rotating shaft 60. In this way, the electrodeposition liquid is shielded to ensure that the base 24 is energized.

Therefore, the frame 32 is rotated by the sprocket 61 rotating at a predetermined rotation speed via the sprocket 58 and the chain 62, whereby the hanger 22 of the base 24 is rotated. The angle with respect to is changed.

Further, as shown in FIG.
A free rail 94 is provided between the rail 18 and the rail 18. The free rail 94 is supported on the processing tank 12 by a support member (not shown). Free rail 94
An endless transfer chain 95 is housed inside the
The free rail 94 moves from one end to the other end. Further, both ends of the free rail 94 are arranged corresponding to the entry position and the exit position of the processing tank 12, respectively.

The free rail 94 extends in parallel with the processing tank 12, and rails 90A and 92A are provided between the rail 18 and the free rail 94, respectively.
Each of the rails 90A and 92A is constituted by a pair of rails. Drop lifters 90 and 92 are attached to the rails 90A and 92A, respectively, and a pair of rails 90A and 92A are respectively operated by a lifting mechanism (not shown).
(See arrows B and C in FIG. 1). The drop lifters 90 and 92 are box-shaped devices connected to a lifting mechanism (not shown). And a hanger moving mechanism (not shown). The hanger moving mechanism is configured to pull the hanger 20 into the drop lifters 90 and 92 and to push the stored hanger 20 in a predetermined direction. Thereby, the rail 18 or the free rail 9
4 is accommodated in the drop lifters 90 and 92, and the accommodated hangers 20 are connected to the free rail 94 or the rail 1.
8.

As shown in FIG. 5, the hanger 20 is provided with a controller 68 which comprises a CPU, a RAM, and a ROM (not shown) and monitors and controls the driving of each component.

Further, a position sensor 70 is connected to the controller 68. The position sensor 70 includes the hanger 22
Light emitters 71A, 71B, 71 provided near rail 18 and free rail 94 of conveyor 16 to which
C and 71D (see FIG. 1) are sensed to output an ON signal. Thereby, the controller 68 can detect the position of the hanger arm 22 on the movement route.

As shown in FIG. 1, the light emitting device 71A is disposed at a first position 80 upstream of the processing tank 12, and the light emitting device 71B is located at a second position near the upstream end of the processing tank 12. The light emitting device 71 </ b> C is disposed at a third position 84 near the downstream end of the processing tank 12, and the light emitting device 71 </ b> C is disposed at the position 82.
1D is disposed at a fourth position 86 downstream of the processing tank 12. The light emitters 71A arranged at these positions,
The controller 68 can recognize the position of the hanger 20 by detecting the light from 71B, 71C, 71D by the position sensor 70.

Accordingly, the controller 68 controls the driving of the rotary drive motor 54 based on the position detected by the position sensor 70, and adjusts the rotation angle of the base 24 based on the pulse signal from the encoder 66. It has become. The controller 68 is connected to a lifting mechanism (not shown) of the drop lifters 90 and 92. The controller 68 raises and lowers the drop lifters 90 and 92 based on the transport amount and the position in the processing apparatus 10 to move the hanger 20 into the processing tank 12. It moves up and down.

As a result, as shown in FIG.
The vehicle body 14 (see FIG. 1), which has maintained a so-called horizontal suspension state in which the longitudinal direction of the vehicle body coincides with the transport direction, rotates by passing through the first position 80, thereby bringing the vehicle body 14 into a vertically suspended state. (See the vehicle body 14A). This allows
When the vehicle body 14 is immersed in the second position 82, it can be immersed in the processing liquid in a vertically suspended state.

In the processing tank 12, that is, at the second position 82
To the third position 84, the vehicle body 14 rotates clockwise in FIG. 6 (the vehicle body 14B,
14C, 14D, 14E, 14F). This allows
The generated bubbles do not accumulate inside the vehicle body 14 irrespective of the shape of the vehicle body 14.

Further, the vehicle body 14 is rotated by passing through the third position 84, so that the vehicle body 14 is rotated 180 ° from the state at the time of entering the tank, and the vehicle body 14 exits the tank in a vertically suspended state. (See the vehicle body 14G).

At the time of entering and exiting the tank, the base 24 for fixing the vehicle body 14 approaches the side wall of the processing tank 12 rather than the vehicle body 14. Thereby, the position where the tank enters and the position where the tank exits can be closest to the side wall of the processing tank 12, and the solution in the processing tank 12 can be used effectively.

Next, the operation of the present embodiment will be described. When a rotation instruction is given from the controller 68 to the hanger 20, the rotation drive motor 54 starts driving, is converted into an appropriate rotation speed by the reduction gear, and is then rotated by the converted rotation speed. Is rotated, and the base 24 is
It turns around 0.

The rotation amount of the rotation drive motor 54 is measured by an encoder 66. When the rotation of the rotation drive motor 54 reaches a predetermined amount, the controller 68 instructs the rotation drive motor 54 to stop. Thereby, the rotation of the base 24 is stopped, and the vehicle body 14 is in a vertically suspended state.

Next, conveyance of the vehicle body 14 using the hanger 20 will be described. Hanger 2 on chuck lock device 50
When the base 24 of zero is placed, the chuck locking device 50
Is connected to the moving mechanism of the chuck 44.

Next, when the vehicle body 14 to be processed is transported by the mounting device 48 and placed on the base 24, the claw 52 of the chuck lock device 50 moves the chuck 44 according to the type of the vehicle body 14, and the vehicle body 14 is moved. Let it be pinched. Thus, the vehicle body 14 is held on the base 24.

When the vehicle body 14 is held on the base 24,
The hanger 20 is arranged on the rail 18 by a drop lifter (not shown). When the conveyor 16 is operated, the hanger 20 is moved along the rail 18 at a predetermined transport speed.
Start the transport toward 2. When the transfer of the hanger 20 is started, the process proceeds to the surface treatment step, and the surface treatment including the rotation shown in FIG. 7 is started.

As shown in FIG. 7, the rotating step performed during the surface treatment of the processing tank 12 includes a rotating step 180 for immersing the body 14 of the processing tank 12 into a tank, 1
2 a rotating step 182 in the processing tank when performing surface treatment on the body 14 immersed in the inside, and a rotating step 184 in removing the body 14 from the processing tank 12 after finishing the surface treatment.
It is composed of

Next, the surface treatment including rotation will be described with reference to FIGS. When the hanger 20 with the vehicle body 14 fixed on the base 24 starts to be conveyed, the process shifts to a turning step at the time of entering the tank shown in FIG. 8, and it is determined in step 200 whether or not the first position 80 has been reached. You. Hanger 2
0 is conveyed along the rail 18, and when the position sensor 70 detects light from the light emitter 71A arranged at the first position 80 and outputs an ON signal to the controller 68, the first position 80 is reached. It will be recognized. If it is recognized that the first position 80 has been reached, the determination is affirmative, and the process proceeds to step 202.

In step 202, the rotation of the base 24 is instructed. In step 204, it is determined whether or not the vehicle body 14 has been suspended vertically. Based on the rotation instruction from the controller 68, the base 24 rotates around the rotation axis 60 while being transported the distance from the first position 80 to the second position 82, and is placed on the base 24. Body 14
In a vertically suspended state with the front part downward.

If the base 24 has rotated and the vehicle body 14 has been suspended vertically, the determination is affirmative and the process proceeds to step 206, where the rotation of the base 24 is stopped. Is determined.

In step 208, when the hanger 20 reaches the second position 82 (the tank entry position) and the position sensor 70 detects the light emitter 71B provided in the second position 82, the determination is affirmative and the step is affirmed. Move to 210. At this time, the hanger 20 is moved from the rail 18 to the drop lifter 9.
Transfer to 0.

In step 210, the drop lifter 90 in which the hanger 20 is stored starts descending. When an elevating mechanism (not shown) connected to the drop lifter 90 operates, the drop lifter 90 descends along the rail 90A with the hanger 20 accommodated. With the drop of the drop lifter 90, the base 24 descends toward the bottom of the processing tank 12, and the vehicle body 14 fixed to the base 24
In a vertically suspended state with respect to the processing liquid filled in the processing tank 12,
Dipped little by little from the front.

When the drop lifter 90 starts lowering, it is determined in step 212 whether or not the lowering has been completed. When the drop lifter 90 descends along the rail 90A and reaches the lowermost end of the rail 90A,
The determination is affirmative and the routine proceeds to step 214. At this time, the vehicle body 14 is completely immersed in the processing liquid. Further, the drop lifter 90 is provided with a hanger 2 at the lowermost end of the rail 90A.
0 is pushed onto the free rail 94, and the hanger 20 moves from the drop lifter 90 to the free rail 94.

In step 214, the transport of the hanger 20 is started along the free rail 94 while the vehicle body 14 is completely immersed in the processing liquid, and the rotation of the base 24 in the processing tank 12 is instructed. The hanger 20 is held by the transport chain 95 inside the free rail 94, and moves along the free rail 94 as the transport chain moves. The rotation in the processing tank 12 is such that the hanger 20 is rotated by the processing tank 12.
While transporting inside, the base 24 rotates in the opposite direction to the rotation when entering the tank, and the vehicle body 14 is suspended from the vertical suspension state to the horizontal suspension state, and further vertically suspended state (the front part of the vehicle body 14 is disposed upward). To By this rotation, all the bubbles inside the vehicle body 14 move to the liquid surface of the processing liquid, and the occurrence of air pockets is prevented.

When the rotation of the base 24 in the processing tank 12 is instructed, the process shifts to a rotation step at the time of tank release shown in FIG.
In step 216, it is determined whether the third position 84 has been reached. When the hanger 20 is transported and reaches the third position 84, the determination is affirmed, and the process proceeds to step 218.

At step 218, the rotation of the base 24 is instructed. At step 220, it is determined whether or not the vehicle body 14 is suspended vertically. When the vehicle body 14 is not vertically suspended with respect to the processing liquid by the rotation inside the processing tank 12, the vehicle body 14 is already rotated by the rotation inside the processing tank 12 after being rotated to the vertically suspended state or by the rotation inside the processing tank 12. When the processing liquid is suspended vertically, the determination is affirmed, and the routine proceeds to step 222, where an instruction to stop the rotation is issued. Thereby, the vehicle body 14 maintains the vertically suspended state with respect to the processing liquid. At this time, the hanger 20 continues the conveyance and the rail 9
It reaches the lowermost end of 2A and is pushed into the drop lifter 92 arranged at the lowermost end of the rail 92A.

When the stop of rotation is instructed, step 22 is executed.
At 4, the drop lifter 92 starts to rise, and the vehicle body 14 leaves the processing liquid in a vertically suspended state. The hanger 2 moved from the free rail 94 to the drop lifter 92
When the drop lifter 92 rises along the rail 92A by a lifting mechanism (not shown), the vehicle body 14 rises with the rise of the drop lifter 92. Here, since the vehicle body 14 is suspended vertically, a large amount of the processing liquid is not taken out. When the drop lifter 92A reaches the uppermost end of the rail 92A, the drop lifter 92 is moved from the drop lifter 92 to the rail 18 and continues to be transported along the rail 18.

Next, at step 226, it is determined whether or not the fourth position 86 has been reached. The fourth position 86 is a position on the downstream side of the processing tank 12, and the vehicle body 14 is
When the hanger 20 is conveyed and reaches the fourth position 86 after the tank is taken out of the tank 2 in a vertically suspended state, the determination is affirmed and the process proceeds to step 228.

At step 228, the base 24 is rotated. At step 230, it is determined whether or not the vehicle body 14 has been suspended horizontally. If the vehicle body 14 has been suspended horizontally, the determination is affirmative and the process proceeds to step 232. Then, the rotation is stopped. As a result, the vehicle body 14 in the vertically suspended state
Is returned to the horizontal suspension state in the same manner as in the transportation before the processing, so that the rotation at the time of leaving the tank ends and a series of processing is completed.

As described above, by entering and exiting the tank 14 in a vertically suspended state with respect to the processing liquid, the resistance can be reduced and the tank can enter and exit at a high speed. It is possible to reduce the carry-out amount of the processing solution. In addition, by rotating inside the processing tank 12, bubbles inside the vehicle body 14 are moved toward the liquid surface of the processing liquid, and air pockets that are likely to be generated at specific locations due to the difference in the shape of the vehicle body 14. Can be prevented.

The paint adhered to the hanger 22, the chain 62, the sprockets 58, 61 can be washed simultaneously with the washing of the vehicle body 14 in the next washing step. Can be carried continuously and another vehicle body 14 can be transported without providing a separate vehicle body.

The processing apparatus 10 can be freely angled and rotated in these steps by connecting other steps such as a shower step and a drying step to the electrodeposition (undercoating) step. In addition, sufficient quality can be ensured in each step.

For this reason, 1) the work of evaluating and evaluating the throwing power of the electrodeposition coating is greatly reduced, and the burden of the structural design for removing paint, water, and air is reduced.
, The development cost of the vehicle body 14 can be reduced: 2) The rust prevention quality can be improved and the appearance quality can be improved together: 3) Reduction in carry-out amount As a result, the amount of the electrodeposition paint and the pretreatment agent can be reduced, and the load on the wastewater treatment apparatus, and thus the wastewater treatment cost, can be reduced, and the industrial performance can be greatly improved.

Therefore, regardless of the shape of the object to be processed, generation of bubbles due to the air pockets can be eliminated in all the surface-treated objects, and the surface quality can be improved and the surface treatment can be performed efficiently.

In the present embodiment, the position on the transport path is detected at four positions by the position sensor 70, but may be reduced to two when entering the tank and when leaving the tank. In this case, the conveyance is stopped at the detection position at the time of entering the tank, the container is rotated in a vertically suspended state, enters the tank, rotates while being conveyed to the detection position at the time of exit, and is conveyed at the detection position at the time of exit. Is stopped, and the tank is rotated vertically and discharged. As a result, the number of parts required for processing can be reduced, and the same effect as described above can be obtained.

In the present embodiment, the vehicle body 14 is rotated by 180 ° from the state at the time of entering the inside of the processing tank 12 in the processing tank 12, but depending on the size of the processing tank 12 and the transport speed of the hanger 20. , 180 ° may be performed a plurality of times. For example, after turning by 180 °, it is possible to further turn by 180 ° in the opposite direction. Thereby, the holding force more than necessary is not required without turning the vehicle body 14 upside down. Further, the occurrence of air pockets can be more efficiently prevented. Further, depending on the shape of the vehicle body 14 and the object to be processed, it is possible to perform the processing efficiently by making the rotation 180 ° or less.

In this embodiment, the hanger 20 is moved up and down by the drop lifters 90 and 92 so that the base 2
Although the vehicle body 14 fixed to 4 is immersed in the processing liquid, other methods may be used as long as the vehicle body 14 can be immersed in the processing tank 12. For example, a hanger arm 2 using a winding member
The entrance and exit of the vehicle body 14 may be performed by changing the distance between the support 2 and the support portion 28.

Further, in the present embodiment, the rotation of the vehicle body 14 is performed based on the rotation of the rotation drive motor 54 via the endless chain 61 wound around the sprockets 58 and 61. Not limited.

For example, a rotating device 2 as shown in FIG.
80 can be used. The rotating device 280 includes an arc-shaped rack 284 having a diameter in the longitudinal direction of the base 282 provided with a mechanism similar to that of the base 24, and a pinion 286 meshing with the rack 284. A rotation shaft 288 is provided substantially at the center of a base 282 for fixing the vehicle body 14 (not shown).
Are arranged, and the base 282 is configured to rotate around the rotation shaft 288 as an axis.

The pinion 286 is attached substantially at the center of the hanger arm (hanging part) 290,
4 through a drive motor 292 attached to a hanger arm (hanging part) 290 above the pinion 286. The drive motor 292 contains a motor body and a speed reducer (not shown), and the rotation speed of the motor body is reduced to an appropriate speed by the speed reducer.
6 is transmitted.

Here, when the drive motor 292 is driven,
The speed is reduced to an appropriate speed, and the pinion 286 rotates via the belt 294. Pinion 286
Is rotated, the rack 284 moves with the rotation of the pinion 286, whereby the base 282 is
8 can be rotated about the axis.

As a result, the base 282 can be rotated in the same manner as described above, and the same effect as described above can be obtained. Further, since the pinion 286 is disposed above the hanger arm 290, the vehicle body 1 fixed to the base 282
4 (not shown) can be arranged above the liquid level when immersed in the processing tank 12. This makes it possible to prevent the pinion 286 from adhering to the liquid surface, thereby facilitating cleaning.

In the present embodiment, the surface treatment is performed while the vehicle body 14 is transported to the processing tank 12, but the surface treatment may be performed while the transport of the hanger 20 is stopped. In this case, the hanger 2 is
It is sufficient to provide one light emitting device 71 for entering and leaving the tank 0, and when the light emitting device 71 arranged above the processing tank 12 is detected, the light emitting device 71 is vertically suspended and immersed in the processing tank 12. Thereafter, it can be rotated on the spot, and after a predetermined amount of rotation has been performed, the tank can be suspended in a vertically suspended state and can be discharged. This allows
The same effect as described above can be obtained by further reducing the number of light emitters 71.

In the present embodiment, the position is detected using the light emitting device 71, but any device that can detect the position can be used. For example, it can be a limit switch.

[Second Embodiment] FIG. 11 shows a processing apparatus 300 according to a second embodiment of the present invention. In the present embodiment, components having the same configurations and effects as those used in the processing device 10 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The processing apparatus 300 is provided with a rail 302 for transporting the hanger 301. Rail 30
2 includes a processing unit 304 curved toward the bottom of the processing tank 12.
Is provided.

The processing section 304 is composed of an inclined section 304A for guiding the hanger 301 downward and upward and a horizontal section 304B for transporting the vehicle body 14 at a constant height. In the processing unit 304, the vehicle body 14 placed on the base 24 can be immersed in the processing liquid.

The hanger 301 has a shaft 306. The shaft 30 is connected to a support portion 28 connected to a trolley 26 that runs on a hanger 301 on a rail 302 (see FIG. 2).

At the back side of the support portion 28 in FIG.
And a controller 308 for controlling the rotation of the hanger 301 and controlling the transport speed of the hanger 301. Rail 30
The position of the hanger 301 on the second is determined by the light emitting devices 71A, 71B, 71C and 71D provided near the rail 302 and the position sensor 70 provided on the back side of the controller 308 in FIG.
(See FIG. 2 (B)) so that it can be recognized.

Here, the inclined portion 3 on the upstream side that passes when entering the tank.
04A, the vehicle body 14 fixed on the base 24 is rotated counterclockwise in FIG. 11 based on the position on the inclined portion 304A to maintain the vertically suspended state (when entering the tank). Rotation). Thus, the vehicle body 14 is immersed in the processing solution in the processing tank 12 in a vertically suspended state. In the horizontal portion 304B, the vehicle body 14 immersed in a vertically suspended state is rotated by 180 °. That is,
The vehicle body 14 is rotated from a vertically suspended state when entering the tank to a horizontally suspended state and further to a vertically suspended state in which the front end portion is directed upward. Thereby, the foam stored inside the vehicle body 14 moves toward the liquid surface.

In the inclined portion 304A on the downstream side, the base 24 is rotated based on the position on the inclined portion 304A, as in the case of entering the tank, so that the vehicle body 14 maintains the vertically suspended state. Rotation when leaving the tank). Thereby, the vehicle body 14 is taken out in a vertically suspended state with respect to the processing liquid in the processing tank 12.

Next, the operation of the present embodiment will be described with reference to FIG. The mounting of the vehicle body 14 on the base 24 and the like are the same as in the first embodiment.
Description is omitted.

When the vehicle body 14 is fixed on the base 24 and the hanger 20 starts to be conveyed, the surface treatment is started. In step 350, it is determined whether or not the hanger 301 has reached the first position 80. Hanger 301 is rail 30
When the position sensor 70 detects the light receiver 71A at the first position 80 by the position sensor 70, the determination is affirmed.

If the judgment is affirmative, in step 352, an instruction to rotate the tank is entered. The hanger 301 is the first
Pass through the position 80 of FIG. Here hanger 30
Since the angle and length of one shaft 306 are fixed, the vehicle body 14 is conveyed while being held obliquely according to the inclination of the inclined portion 304A. Here, the base 24 rotates in accordance with the inclination of the inclined portion 304A, and holds the vehicle body 14 in a substantially vertically suspended state with respect to the processing liquid. As approaching the horizontal portion 304B, the vehicle body 14 is immersed in the processing liquid while maintaining a substantially vertically suspended state.

When the rotation at the time of entering the tank is instructed, step 3
At 54, it is determined whether the second position 82 has been reached. If the position sensor 70 detects the light emitter 71B provided on the upstream side of the horizontal portion 304B, the determination is affirmative.

When the determination is fixed, rotation in the processing tank is instructed in step 356. The vehicle body 14 immersed in the processing solution in a vertically suspended state rotates 180 ° clockwise in FIG. 8 while being transported in the processing tank 14.

When the rotation in the processing tank is instructed, it is determined in step 358 whether or not the third position 84 has been reached. If the position sensor 70 detects the light emitter 71C provided on the downstream side of the horizontal portion 304B, the determination is affirmative.

If the judgment is affirmative, in step 360, a rotation at the time of leaving the tank is instructed. The hanger 301 is transported along the slope of the slope 304A that is continuous with the horizontal section 304B. Here, the base 24 rotates in accordance with the inclination of the inclined portion 304A, and holds the vehicle body 14 in a substantially vertically suspended state. The vehicle body 14 exits the tank in a substantially vertically suspended state.

When the rotation at the time of leaving the tank is instructed and the rotation at the time of leaving the tank is performed, the fourth position 86 is set at step 362.
Is determined. The fourth position 86 is a position on the downstream side of the processing tank 12 and the processing unit 304. When the position sensor 70 detects the light emitter 71D provided at this position, the determination is affirmative, and the process proceeds to step 364.

At step 364, rotation is instructed, and at step 366, it is determined whether or not the vehicle body 14 has been suspended horizontally. The determination is affirmative that the base 24 pulled up from the processing tank 12 in the substantially vertically suspended state is rotated, and after passing through the fourth position 86, the base 24 is in the laterally suspended state in which the front end of the vehicle body 14 is directed in the transporting direction. And step 36
At 8, an instruction to stop the rotation is issued.

Thus, the vehicle body 14 enters and leaves the tank in a vertically suspended state, so that the processing liquid can be applied to the treatment liquid with low resistance.
Can be immersed, and by rotating the vehicle body 14 in the processing tank 12, the occurrence of air pockets can be prevented. In addition, the body 14 can be maintained in a vertically suspended state at the time of leaving the tank, so that taking out of the liquid can be minimized.

In this embodiment, the hanger 3 is fixed in a state where the angle of the shaft 306 with respect to the rail 302 is fixed.
However, in order to maintain the vehicle body 14 in a vertically suspended state with respect to the liquid level, the shaft 3
06, hanger arm 22 with respect to shaft 306
May be changeable so that the longitudinal direction of the hanger arm 22 matches the direction perpendicular to the bottom surface of the processing bath 12. For example, one of these is provided with an angle changing axis so that the hanger arm 2
The longitudinal direction of 2 may be perpendicular to the liquid surface of the processing liquid. This allows the hanger arm 22 to hang down based on gravity and adjust the angle of the base 24 by simple control.

[0101]

As described above, according to the present invention, the holding table can be rotated by the rotating means, so that it can be quickly suspended in the vertically suspended state when entering and exiting the tank. By rotating in the inside, it is possible to prevent the generation of air pockets due to the shape of the object to be treated. Therefore, irrespective of the shape of the object to be treated, generation of bubbles due to air pockets can be eliminated in all the objects to be treated, and efficient surface treatment with good finish quality can be performed.

Further, by providing the holding table with a movable adjusting member and a holding member for holding a part of the object to be processed, even if the shape of the object to be processed is changed, it can be adjusted to the set holding position. Thus, the holding member can be moved, and the object to be surface treated can be held on the holding table regardless of the shape of the object to be surface treated.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a processing apparatus according to an embodiment of the present invention.

2A is a side view of the hanger according to the embodiment, and FIG. 2B is a front view of the hanger.

FIG. 3 is a schematic perspective view of a hanger base according to the embodiment of the present invention.

FIG. 4 is a diagram illustrating a state when the vehicle body is mounted on the hanger according to the embodiment of the present invention.

FIG. 5 is a block diagram schematically showing a processing apparatus according to the embodiment of the present invention.

FIG. 6 is a conceptual diagram illustrating a surface treatment according to the embodiment of the present invention.

FIG. 7 is a process chart illustrating a surface treatment according to the embodiment of the present invention.

FIG. 8 is a flowchart illustrating surface treatment (rotation at the time of entering a tank and rotation within a processing tank) according to the embodiment of the present invention.

FIG. 9 is a flowchart illustrating a surface treatment (rotation during tank release) according to the embodiment of the present invention.

FIG. 10 is a side view of another rotating device according to the embodiment of the present invention.

FIG. 11 is a conceptual diagram of a processing apparatus according to another embodiment of the present invention.

FIG. 12 is a flowchart illustrating a surface treatment according to another embodiment of the present invention.

FIG. 13 is a conceptual diagram illustrating a conventional surface treatment.

FIG. 14 is a conceptual diagram illustrating another conventional surface treatment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Processing apparatus 12 Processing tank 14 Body (object to be processed) 20 Hanger (hanging means) 22 Hanger arm 24 Base (holding stand) 34 Fixing member 54 Rotation drive motor 60 Rotary shaft (rotation means) 68 Controller (rotation control) Means, connection control means) 70 position sensor 71A, 71B, 71C, 71D light emitter 80 first position 82 second position 84 third position 86 fourth position 90, 92 drop lifter (elevating means) 94 free rail

Claims (6)

[Claims] 1. A holding table for holding an object to be processed, a suspending means for suspending the holding table, a rotating means provided on the suspending means for rotating the holding table, A surface treatment apparatus, comprising: a holding table moving unit that moves a lower unit up and down to move in and out of a tank; 2. A first detecting means provided in the middle of the transport path for detecting a position of the holding table, and the transport means is stopped based on a signal from the first detecting means, and the rotation is performed. By rotating the means, the longitudinal direction of the surface-treated object held by the holding table is entered into the vertical direction, the holding table is rotated, and the longitudinal direction of the surface-treated object is vertically discharged. The surface treatment apparatus according to claim 1, further comprising: a rotation control unit configured to perform the rotation control. 3. A first detecting means provided in the middle of the transport path for detecting a tank entering position of the holding table, and a second detecting means provided in the middle of the transport path for detecting a tank leaving position of the holding table. Means for rotating the rotating means on the basis of a signal from the first detecting means so that the longitudinal direction of the surface-treated object held by the holding table is entered in the vertical direction, and the holding table A rotation control means for causing the holding means to rotate by a rotation control means for causing the longitudinal direction of the object to be treated to be discharged in a vertical direction based on a signal from the second detection means. The surface treatment apparatus according to claim 1, further comprising: conveyance control means for executing the conveyance while continuing the conveyance. 4. An adjusting member, wherein the holding table is movable in a longitudinal direction of the surface-processed object placed on the holding table, and wherein the adjusting member is provided in a direction orthogonal to a moving direction of the adjusting member. The surface treatment apparatus according to any one of claims 1 to 3, further comprising: a holding member movably provided, the holding member holding a holding portion of the surface treatment target placed on the adjustment member. 5. A rotating shaft for rotatably supporting the holding table with respect to the suspending unit, a sprocket provided coaxially with the rotating shaft, and the suspending unit. A driving source provided at an upper end of the chain; a chain for transmitting a rotational force of the driving source to the sprocket; and a drive control means for controlling a driving amount of the driving source and rotating the holding table to a predetermined angle. The surface treatment apparatus according to any one of claims 1 to 4, comprising: 6. A surface treatment object is suspended in a treatment tank filled with a surface treatment liquid while being suspended and conveyed on a conveyance path, and immersed in the treatment liquid to perform surface treatment. In the surface treatment method to be performed, In the treatment tank, the longitudinal direction of the object to be treated is entered with the longitudinal direction as a vertical direction, and inside the treatment tank, the object to be treated immersed in a treatment liquid is rotated. A tank is discharged from the treatment tank with the longitudinal direction of the surface-treated object as a vertical direction.