JP4497437B2 - Dipping processing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transfer device that allows a workpiece supported by a conveyor to pass through a plurality of processing steps while changing its posture, and more particularly to an apparatus suitable for a surface treatment line such as car body painting in a vehicle manufacturing factory.
[0002]
[Prior art]
In the painting line of a vehicle, there are many processing steps such as pretreatment, electrodeposition, washing with water, painting and drying, and the workpiece is transferred between these processing steps by a conveyor. Among these, when dipping the body of a relatively large four-wheeled vehicle, as shown in FIG. 11A, the workpiece W transferred on the floor conveyor FC arranged on the floor surface, It is arranged so as to move up and down on the paint line, transferred to the overhead conveyor HC and supported by hanging, and in this state, the conveyor itself is pretreated and electrodeposition tank while passing over the pretreatment and electrodeposition tank. By moving the workpiece up and down, the workpiece is moved up and down for dipping, and then transferred to the floor conveyor FC again.
[0003]
In the case of electrodeposition coating, it is known to change the posture in various ways such as rotating a workpiece in an electrodeposition coating tank in order to obtain excellent coating quality (for example, Japanese Patent Publication No. 6-104920, JP-A-2-111481 etc.). Further, Japanese Patent Publication No. 6-104920 shows electrodeposition coating of a vehicle body by dipping, and this method is a batch type treatment, and an elevating mechanism for raising and lowering the vehicle body in a dipping treatment tank and submerged in liquid. A rotating mechanism for rotating the vehicle body is provided, and dipping processing is performed by a two-step action of raising and lowering and subsequent rotation.
[0004]
On the other hand, when painting the body of a relatively small two-wheeled vehicle, as shown in FIG. 11B, the entire painting process can be processed by the overhead conveyor HC. Although it is not necessary to transfer like a wheeled vehicle, the same up and down movement operation is performed for the dipping process. In the following explanation, the workpiece posture of the type that places and supports the workpiece on the floor conveyor is the floor conveyor posture, the workpiece posture of the type that supports the suspension is the overhead conveyor posture, and is substantially horizontal to the side of the conveyor. The supported posture is called a side conveyor posture. In addition, rotating in a plane orthogonal to the traveling direction is called lateral rotation.
[0005]
[Problems to be solved by the invention]
By the way, in processing that requires the workpiece posture to be changed between a floor conveyor posture and an overhead conveyor posture, there is a time loss if the workpiece posture is changed every time the workpiece posture changes during transfer. It is desirable not to transfer the workpiece on the way even if changes. Moreover, since the ratio of the time required only for the entry / exit tank that is not useful for immersion is increased with respect to the substantial immersion time of the work in the method in which the conveyance line is continuously changed up and down like the dipping process in the conventional example, Improvement of this time loss is also desired. Furthermore, in the case of an overhead conveyor, there is a risk that the quality of surface treatment such as painting will deteriorate due to the adhering of dust falling from the upper conveyor. Is also desirable. Accordingly, the present invention aims to solve such problems.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the first invention related to the dipping process of the present application is a dipping process configured so that a work conveyed by a conveyor disposed above a processing tank for dipping or the like is caused to appear and disappear in a processing tank for dipping or the like. In the device
Through the carrier to the conveyor upwards it is swung around the traveling direction and parallel to the rotation axis in plane perpendicular position to Ruki Yaria the treatment tank above the dipping to the traveling direction while supporting the workpiece Equipped with a horizontal rotation mechanism that causes the workpiece to appear in and out of a processing tank such as dipping ,
This horizontal rotation mechanism, a part of the conveyor located above the treatment tank such as the dipping is a movable part that rotates in the orthogonal plane, this movable part is rotated with the carrier,
A plurality of treatment tanks such as dipping are arranged in series in the direction of workpiece movement,
The horizontal rotation mechanism is provided on each treatment tank,
These dipping processing tanks are sequentially dipped .
[0008]
A second invention is characterized in that, in the first invention, a conveyor located above a processing tank for dipping or the like is disposed in the same horizontal plane.
[0010]
According to a third aspect of the present invention, in the first aspect of the present invention, the tact transport system is characterized in that the dipping process is performed after the carrier transport is stopped above the processing tank for dipping or the like .
[0011]
【The invention's effect】
According to 1st invention, it conveys in the floor conveyor attitude | position which supports a workpiece | work on the conveyor arrange | positioned above the processing tanks, such as a dipping, and rotates a workpiece | work about 180 degrees in the upper position of the processing tanks, such as a dipping. Then, the work is immersed in a processing tank for dipping and the like, and when further rotated by about 180 °, the work comes out of the processing tank for dipping and returns to the original floor conveyor. Accordingly, the workpiece is dipped during the horizontal rotation. In addition, since the workpiece is rotated horizontally without moving the conveyor itself as in the prior art, the loss time required only for the entry / exit tank can be remarkably reduced regardless of immersion, and the dipping process can be made more efficient.
[0012]
In addition, since a part of the conveyor itself is moved as a movable part, the movable part can be made strong and relatively simple in structure. Further, the rotating means for the movable part can be easily accommodated in the hollow part of the conveyor.
Furthermore, when there are a plurality of processing tanks for dipping and the like, they are arranged in series, and the work is laterally rotated on each of them, so that the dipping processing can be sequentially performed for each processing tank for each dipping and the like, and the efficiency is improved. The space between the processing tanks for each dipping or the like can be reduced by as much as possible.
[0013]
According to the second aspect of the invention, by arranging the conveyor so as to form a straight line in the same horizontal plane without moving up and down, the apparatus is simplified and maintenance is facilitated, and installation space can be saved.
[0015]
According to the third aspect of the present invention, the work can be transported as a tact transport, and the transport can be stopped on the processing tank such as dipping and the dipping process can be performed, so that the length of the processing tank such as dipping can be shortened as much as possible. In the case where a processing tank for dipping or the like is provided, such a short processing tank for dipping or the like can be disposed adjacently, so that the entire dipping processing apparatus can be made extremely compact.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment applied to a painting line of a motorcycle will be described with reference to the drawings. FIG. 1 shows a dipping process according to the present embodiment, where the dipping process is performed by the jig A, the pretreatment B, and the electrodeposition coating C. Then, although pre-processing drying D and also illustration are abbreviate | omitted, each process of topcoat and topcoat drying is performed.
[0017]
Pre-treatment B for performing dipping treatment is pre-degreasing 1, degreasing 2, washing 3 · 4, surface tone (surface adjustment) 5, chemical conversion (treatment) 6, washing 7 · 8 · 9, pure washing (pure water washing) 10 These steps are sequentially performed. In addition, the processing tanks such as dipping used for the dipping process are provided corresponding to the respective processes, and in the figure, the process numbers are added (the process numbers in the figure are indicated by the corresponding circled numbers). The same shall apply hereinafter. Each of these dipping processes is the minimum necessary so that the length in the traveling direction F is slightly longer than the length of the workpiece 1 in the front-rear direction, and they are arranged in series in contact with each other. Moreover, in the electrodeposition C of the next process, each process of the electrodeposition 11 and the water washing 12-15 is performed.
[0018]
The conveyor 2 is arranged in a straight line in the same horizontal plane above the processing tanks for dipping and the like, that is, there is no up and down in the vertical direction, and the work 1 is stopped on each processing tank for dipping and dipping processing. It has become a tact transport.
[0019]
The workpiece 1 is rotated laterally with respect to the conveyor 2 by a method described later, and is supported on the floor 2 (indicated by broken lines in steps 1 to 15). It moves between the overhead conveyor postures (shown by solid lines) supported in a suspended manner downward.
[0020]
In this way, even if the conveyor 2 is kept horizontal, the work 1 can be dipped only by lateral rotation for each processing tank such as dipping. Therefore, as in the dipping process using a conventional overhead conveyor, Loss time spent only in the entry / exit tank without being consumed can be significantly reduced, and the dipping process can be made more efficient.
[0021]
In addition, since the work is rotated horizontally, the length of the processing tank such as dipping in the traveling direction F is slightly longer than the length of the work 1 in the front-rear direction, and therefore can be shortened as much as possible. Moreover, since the conveyor 2 can be made into a simple shape, maintenance is facilitated and installation space is not required.
[0022]
In addition, since the tact transfer system is adopted, it is possible to stop each dipping process tank for dipping processing, and as a result, these dipping processing tanks can be arranged in series in contact with each other. The whole can be remarkably compact.
[0023]
2 to 5 relate to the first embodiment, FIG. 2 is a side view partially cut away of a part of the conveyor, FIG. 3 is a plan view thereof, and FIG. 4 is a sectional view taken along line 4-4 of FIG. FIG. 5 and FIG. 5 are views similar to FIG. 4 showing the state during rotation.
[0024]
In these drawings, a position of a part of the conveyor 2 that is a hollow member having a regular square cross-sectional view, the position corresponding to the process that needs to change the workpiece posture from the floor conveyor posture to the overhead conveyor posture, etc. And
[0025]
The movable portion 4 has the same cross section as the front and rear conveyors 2 and is rotatable in a lateral direction rotating in a plane perpendicular to the traveling direction F. That is, the step motor 5 is fixed inside one side of the conveyor 2 with the movable part 4 interposed therebetween, and the rotation shaft 6 is provided in parallel with the centers of the conveyor 2 and the movable part 4. 7 and allows the vertical wall 7 to rotate integrally. The tip of the rotating shaft 6 is fixed to the vertical wall 8 of the other conveyor 2 with a nut 9.
[0026]
Thereby, when the step motor 5 rotates by a predetermined angle, the movable part 4 integrated with the rotating shaft 6 integrally rotates laterally at the same angle as the rotation angle. The bottom surface of the conveyor 2 is supported on the floor surface by the support columns 10 at predetermined intervals in the length direction. The movable part 4 is made rotatable without the support 10.
[0027]
The carrier 3 has a similar shape that penetrates the conveyor 2 and the movable part 4, and has a main body part 11 having a slightly larger square hole shape, and the conveyor 2 and the movable part 4 penetrate through the main body part 11. The movable part 4 is guided on the conveyor 2 and the movable part 4 and can move in the traveling direction in the form of a monorail.
[0028]
One end of a support rod 12 is integrally attached to the upper surface of the main body 11, and the work 1 is supported at the other end. In addition, rollers 13 are rotatably supported at a total of four positions on the front, rear, left, and right of each surface, and these roll on the surfaces of the conveyor 2 and the movable portion 4.
[0029]
Disc-shaped flanges 14 are provided at both front and rear ends of the main body 11, and a cutout portion 15 is formed at a part of the lower portion when the floor conveyor is in a posture so as to avoid interference with 10 when traveling. It has become. The flange 14 is always engaged with a substantially U-shaped locking member 16, and this engaged state is maintained even when the carrier 3 rotates laterally.
[0030]
The locking member 16 is fixed to a belt-shaped carrier feeding member 17 disposed in parallel with the conveyor 2, and the carrier feeding member 17 moves in the traveling direction F, whereby the locking member 16 causes the conveyor 2 and the movable portion 4 to move. It moves in the traveling direction F regardless of whether the carrier 3 is laterally rotated.
[0031]
Next, the operation of this embodiment will be described. FIG. 6 shows the electrodeposition coating process C. When the carrier 3 moves on the conveyor 2 in the floor conveyor posture and stops on the movable part 4 provided in the upper part of the electrodeposition paint tank 18 in the conveyor 2. . Here, when the step motor 5 rotates 180 °, the carrier 3 rotates 180 ° laterally through the vertical wall 7 integrated with the rotating shaft 6.
[0032]
For this reason, the work 1 is rotated horizontally to become an overhead conveyor posture, etc., is immersed in the electrodeposition paint tank 18, and after the paint is attached by dipping, if it is further rotated 180 °, it comes out of the electrodeposition paint tank 18. Return to the original floor conveyor posture. At this time, the workpiece 1 can be continuously rotated laterally or intermittently in the electrodeposition paint tank 18 by setting the step motor 5, and the electrodeposition coating can be performed by moving the electrodeposition paint tank 18. Make it better.
[0033]
In addition, since the conveyor 2 itself does not change up and down and maintains a straight line, the workpiece 1 can be immediately dipped, and the dipping time is spent only on the inlet / outlet tank, so that the loss time not related to dipping can be remarkably shortened. The whole can be shortened.
[0034]
In addition, since a part of the conveyor 2 itself is the movable part 4, the movable part 4 can be made strong and relatively simple in structure. Further, the rotation means can be easily configured by the step motor 5, and by using the step motor 5, it can be easily accommodated in the hollow portion of the conveyor 2, and the rotation direction and angle can be freely controlled.
[0035]
Further, since the carrier 3 is supported on the conveyor 2 in a monorail shape, the support of the carrier 3 becomes simple and strong in structure, and the conveyance of the workpiece 1 can be stabilized. This is particularly advantageous when supporting a heavy workpiece 1.
[0036]
Further, since the flange 3 is provided on the carrier 3 and engaged with the locking member 16 of the carrier feeding member 17 parallel to the conveyor 2, the engagement with the locking member 16 is always maintained even when the carrier 3 rotates. Thus, the carrier 3 can be moved, which is suitable as a mechanism for moving the carrier 3 regardless of the rotational position.
[0037]
Next, a second embodiment will be described. 7 is a side view in which a movable part and a part of its adjacent part are cut away, FIG. 8 is a plan view showing its action, and FIG. 9 is a view showing the action shown from the front in the traveling direction F.
[0038]
In these drawings, the conveyor 2 has a rectangular tube shape and has a movable part 4 in a part thereof. The movable part 4 can be rotated laterally by a step motor 5, the step motor 5 is fixed in one conveyor 2 sandwiching the movable part 4, and the rotation shaft 6 passes through the movable part 4 to the other conveyor 2. The tip is fixed to the vertical wall 8 here. The movable portion 4 can rotate integrally with the vertical wall 7 and the rotary shaft 6, thereby rotating synchronously with the rotary shaft 6.
[0039]
The carrier 3 is connected so as to move along each side surface of the conveyor 2 and the movable portion 4, and the protruding portion 21 of the carrier 3 is connected to the conveyor 2 from the slit 20 formed continuously on the side surface in the length direction. And the roller 22 provided in the four corners of the front and rear and the upper and lower sides is supported by this protrusion 21 in the inside of the movable part 4.
[0040]
The carrier 3 is movable by a roller 22 that rolls inside the conveyor 2 and the movable portion 4, and moves in the traveling direction F by appropriate driving means (not shown). A horizontal arm 23 extends laterally from one side of the carrier 3, and the work 1 is supported at its tip 24 in an upright and appropriate state, which is a state when the motorcycle is in use (FIG. 9A). Moreover, as shown to FIG. 8A, it is supported by the conveyor 2 and the one side (this example left side).
[0041]
Next, the operation of this embodiment will be described. When the carrier 3 moves onto the electrodeposition paint tank 18 of FIG. 6, the carrier 3 stops and the step motor 5 rotates 180 °. Thereby, since the movable part 4 rotates sideways, it becomes an overhead conveyor attitude | position etc. which are shown to FIG. 8A and FIG. 9A, and a dipping process is attained like a previous Example. Since this process is the same as in the previous embodiment, a description thereof will be omitted.
[0042]
Next, a third embodiment will be described. In FIG. 10, two processing tanks 30 and 31 for dipping and the like are provided side by side, and the conveyor 2 is positioned above a boundary portion where these tanks are in contact with each other. It is supported so that it can rotate freely. This lateral rotation mechanism may be any of the first and second embodiments.
[0043]
Further, the treatment tanks 30 and 31 for dipping and the like are configured symmetrically so as to have a substantially ¼ circular cross section, and the treatment tanks for both dipping and the like are combined so as to have a substantially semicircular cross section. The outer walls of the treatment tanks 30 and 31 for each dipping or the like are formed in an arc shape and correspond to the trajectory of the work 1 that rotates horizontally from side to side about the conveyor 2, and the amount of processing liquid to be accommodated can be minimized.
[0044]
A in the figure is a neutral position when the workpiece 1 is in a neutral position and has a floor conveyor posture and moves between processing tanks (not shown) such as dipping adjacent in the front-rear direction. The dipping process is started by laterally rotating in this direction.
[0045]
B and C in the figure are in the state of dipping processing. If the workpiece 1 is rotated clockwise, it will be immersed in the processing tank 30 such as dipping on the right side (B), and it will be rotated counterclockwise. For example, it can be immersed in the processing tank 31 for dipping on the left side (C), and a processing tank for dipping etc. can be selected depending on the horizontal rotation direction. At this time, it is possible to realize uniform or sufficient dipping processing by swinging the workpiece 1 in a processing tank such as dipping or rotating it around the axis of the support arm 32.
[0046]
D in the drawing is a state at the end of the dipping process, and the side conveyor posture in which the support arm 32 is made substantially horizontal and the workpiece 1 is pulled up above the treatment tank 30 or 31 for dipping or the like is formed, and this posture is maintained for a predetermined time. By maintaining, sufficient sagging of the excessively attached processing liquid is enabled. At this time, it is more effective if it is slightly tilted, rotated around the axis of the support arm 32, or swung by a small angle.
[0047]
As described above, when the processing tanks 30 and 31 such as dipping are arranged side by side, when it is necessary to perform the same type of processing and selecting either the left or right, the direction of travel can be selected according to the horizontal rotation direction of the work 1. The equipment can be shortened and the equipment can be made compact.
[Brief description of the drawings]
FIG. 1 is a diagram of a dipping process according to an embodiment. FIG. 2 is a side view of a main part in a floor conveyor posture according to a first embodiment. FIG. 3 is a plan view thereof. FIG. 5 is a view similar to FIG. 4 in the overhead conveyor posture, etc. FIG. 6 is an explanatory view of the work posture control in the electrodeposition coating process. FIG. 7 is a side view of the main part of the floor conveyor posture according to the second embodiment. FIG. 9 is a diagram showing the plan view together with the action. FIG. 9 is a diagram showing the action from the front in the traveling direction. FIG. 10 is a principle diagram of the third embodiment.
1: Workpiece, 2: Conveyor, 3: Carrier, 4: Moving part, 5: Step motor, 6: Rotating shaft 6, 18: Electrodeposition coating tank

Claims (3)

In the dipping processing apparatus configured to make the work conveyed by the conveyor disposed above the processing tank such as dipping appear and disappear in the processing tank such as dipping,
Through the carrier to the conveyor upwards it is swung around the traveling direction and parallel to the rotation axis in plane perpendicular position to Ruki Yaria the treatment tank above the dipping to the traveling direction while supporting the workpiece Equipped with a horizontal rotation mechanism that causes the workpiece to appear in and out of a processing tank such as dipping ,
This horizontal rotation mechanism, a part of the conveyor located above the treatment tank such as the dipping is a movable part that rotates in the orthogonal plane, this movable part is rotated with the carrier,
A plurality of treatment tanks such as dipping are arranged in series in the direction of workpiece movement,
The horizontal rotation mechanism is provided on each treatment tank,
A dipping processing apparatus characterized by sequentially dipping the processing tanks for each of these dippings. The dipping processing apparatus according to claim 1, wherein a conveyor positioned above the processing tank for dipping or the like is disposed in the same horizontal plane. 2. The dipping processing apparatus according to claim 1, wherein the dipping processing apparatus performs a dipping process after stopping the carrier transport above the processing tank for the dipping or the like.

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