JPH0320480B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an automatic electrodeposition coating processing apparatus in which workpieces (objects to be coated) are successively conveyed between processing steps.

(Prior Art) In electrodeposition coating, it is necessary to change the electrodeposition paint depending on the required coloring. In general, in automatic electrodeposition coating processing equipment that has a claw-feeding workpiece transport mechanism, the workpiece transport pitch is constant, so when changing paint, the paint in the electrodeposition paint tank placed on the workpiece transport path is removed. A replacement method is used. However, this method is inefficient because it requires a lot of effort and time to replace the parts.

Also, a structure is adopted in which a cart is attached to the electrodeposition paint tank and the tank is replaced by the cart. In this case, not only is it necessary to secure a large space for the switching work, but also the replacement work becomes troublesome as the number of colors increases. Moreover, in order to achieve automation, the mechanism has to become complicated and large.
It is difficult to adopt an automatic mechanism.

(Objective of the invention) When using multiple types of electrodeposition paints, it is possible to quickly and easily change the paints, there is no need to secure a large space for the changeover, and the automation mechanism has a simple configuration. To provide an automatic electrodeposition coating processing device.

(Structure of the Invention) This is an automatic electrodeposition coating processing device that has the following essential requirements.

(a) A claw-feeding workpiece conveyance mechanism is provided in which workpieces are conveyed on horizontal rails at a constant pitch, so that the workpieces are conveyed one after another between each processing process.

(b) A plurality of electrodeposition baths are arranged in a line along the conveyance path.

(c) Provide a feeding device that transports the workpiece from the previous process position to a predetermined electrodeposition tank along the rail, and a delivery device that transports the workpiece from the electrodeposition tank to the next process position along the rail. .

(Example) In FIG. 1, a workpiece conveyance path 2 extending horizontally in an oval shape is arranged above the equipment table 1, and various processing process members arranged along the path 2 are arranged below the path 2. It is installed on the equipment stand 1. These processing process members are arranged in order from the load position L in the transport direction ( _arrow
Washing shower 7, gloss dipping tank 8, washing tank 9, washing shower 10, setting tank 11 for removing water droplets,
The conveyance path 2 further extends in an annular manner from the unloading position U to the loading position L. In addition, each electrodeposition paint tank 4a, 4b, 4
C can hold various types of paint. Also, the gloss dipping tank 8 has a trolley (not shown) on the bottom surface.
If you do not want to use it, you can withdraw it as shown by the imaginary line 8'.

The entire transport path 2 can be moved vertically as shown in FIG. 2 by a drive balance device 20 installed in the center. More specifically, the route 2 is composed of an annular work rail 21 made of a copper plate and a PVC resin plate, and the copper plate is used only in the part of the rail 21 that requires electricity (section l ₁ in FIG. 1). The rail 21 is a horizontal arm 22
It is fixed to the drive balance device 20 by means of and extends on one horizontal plane. A claw feeding device 23 is arranged parallel to the rail 21 at a distance above the rail 21, and a claw 24 provided on the device 23 is in contact with a hanger 25 slidably hung on the rail 21. The claw 24 is attached to the device 23 along the conveyance path 2.
There are ten claws 24 provided at equal intervals (excluding the area _l1 in FIG. 1), and each claw 24 is connected to a drive motor (not shown) built in the drive balance device 20 via a link mechanism (not shown). ing. This allows each pawl 24 to reciprocate along the conveyance path 2 at a constant pitch. Further, the hanger 25 is made of a conductive material such as a copper alloy, and is adapted to be hung with a workpiece 26.

Next, the feeding device will be explained. In FIG. 3, which is a cross-sectional view of FIG.
0 has a sub-motor 31 with a reduction gear at its upper end, and its drive shaft 32 is arranged in a direction perpendicular to the path 2 (FIG. 1). A gear 33 is provided on the shaft 32, and the gear 33 is connected to the arm portion 34 of the claw feeder 23.
It meshes with a rack gear 35 fixed on the top surface. The rack gear 35 extends along the path 2 in FIG. 1 during a section _l2 from the pure water treatment tank 3 to the paint recovery tank 5. The motor 31 in FIG. 3 has two brackets 36, 36 on its lower surface, and two axles 37 parallel to the shaft 32 are rotatably fitted into the brackets 36. The two axles 37 are arranged in parallel at right angles to the longitudinal direction of the rack gear 35, and a total of four wheels 38, 38 made of bearings are provided at both ends of each axle 37. Each wheel 38, 38 is 2
The guide rails 39, 39 of the book are rotatably fitted, and each guide rail 39, 39 extends along the rack gear 35 and has the same length as the rack gear 35. Further, the rail 39 is fixed to the arm portion 34 via a flat plate 40.

Further, an L-shaped arm 45 is provided on the lower surface of the motor 31.
The upper end of the arm 45 is fixed, and two rollers 46, 46 that rotate about a vertical axis are provided on the upper surface of the lower end of the arm 45 on the side of the claw feeding device 23. The rollers 46, 46 sandwich a support rail 47 formed on the lower surface of the arm portion 34 from both sides, and the rail 47 extends parallel to the rack gear 35 by the same length. The upper end of an L-shaped sub-arm 48 is fixed to the lower end surface of the arm 45. A pin 49 projecting downward is fixed to the lower horizontal portion of the sub-arm 48, and a base portion of a pusher 50 is rotatably supported on the pin 49. The pusher 50 is always elastically biased by a tensioned spring 51 in a direction in which its tip is brought into pressure contact with the work rail 21 .

The work rail 21 is fixed to a splint 55 which is narrower than the rail 21, and the splint 55 is attached to the arm 22.
Fixed. The hanger 25 hung on the rail 21 has an upper hook portion 56 slidably fitted to the rail 21, and a vertical plate portion 57 of the hook portion 56 comes into contact with the pusher 50. Hook part 5
A tongue piece 58 protrudes from the upper end of 6.
The lower end of the claw 24 is brought into contact with the lower end of the claw 24.
The upper end of the pawl 24 is rotatably supported by a bracket 60 of a rail member 59 about a horizontal axis, and the rail member 59 extends along the path 2 (FIG. 1). The rail member 59 is placed on a large number of rollers 61 that are rotatable about a horizontal axis, and each roller 61 is supported by a bracket 65 formed on the lower surface of the arm portion 34.

Note that the rail member 59 is connected to a drive motor built in the drive balance device 20 (FIG. 1) via a link mechanism (not shown), so that the rail member 59 reciprocates on the roller 61 at a constant pitch. It's getting old. Also, as shown in Figure 4,
One end of the spring 51 is locked to a vertical pin 62, and the pin 62 is fixed to the tip of a bracket 63 whose base is fixed to the pin 49, and the pin 64 is held against the pin 64 on the pusher 50 with the pin 49 sandwiched therebetween. They are located almost on opposite sides.

The feeding device 70 also has the same structure as the feeding device 30, as shown in FIGS. 3 and 4.
In addition, the feeding device 30 includes a pure water treatment tank 3 and an electrodeposition paint tank 4.
a, 4b, 4c (Fig. 1), and the feeding device 70 moves on the same rack gear 35 and guide rail 39 between the electrodeposition paint tanks 4a, 4b, 4c and the paint recovery tank. 5 (Fig. 1).

Next, the operation will be explained. First, it is determined which of the electrodeposition paint tanks 4a, 4b, and 4c shown in FIG. 1 will be used. For example, if tank 4b is to be used, a button on a control box (not shown) is operated to set that fact. Next, press the start button and hang the workpiece 26 (both shown in FIG. 2) on the hanger 25 from the load position L shown in FIG. When the device is activated, the work rail 21 and the claw feeding device 23 are automatically raised by the drive balance device 20 to the position indicated by the imaginary line in FIG. 2, and the work 26 is lifted. Subsequently, the claw 24 moves along the path 2 by a certain pitch, so that the hanger 25 moves to the rail 2.
1 and placed above the pure water treatment tank 3 in FIG. At this time, since the feeding device 30 shown in FIG. 4 is placed above the tank 3, the hanger 25 pushes aside the pusher 50 and advances forward of the device 30, resulting in the state shown in FIG. Go back. When the path 2 is lowered by the device 20, the work 26 (FIG. 2) is immersed in the processing tank 3.

During processing in the tank 3, a new workpiece 26 is hung on the next hanger 25 from the load position L. When the processing in the tank 3 is completed, the work rail 21 and the claw feeding device 23 are raised again by the drive balance device 20 to the position indicated by the imaginary line in FIG. Next, nail 24
is moved by a certain pitch and a new workpiece 26 is placed on the processing tank 3, but at the same time as the claw 24 is activated, the feeding device 30 is also activated. When the sub motor 31 starts, the gear 33 rolls on the rack gear 35 and connects to the hanger 25 via the arm 45, pusher 50, etc.
is slid on the rail 21 and carried onto the electrodeposition paint tank 4b. When a limit switch (not shown) detects that the hanger 25 has reached a predetermined position, the feeding device 30 stops there, and then only the device 30 returns to the top of the tank 3. At the same time as the device 30 begins to return, the delivery device 70, which has been waiting above the paint recovery tank 5, is activated and moves above the tank 4b. At this time, the pusher 50 climbs over the hanger 25, and the device 70 stops in the same posture as shown in FIG. Next, when the path 2 is lowered by the apparatus 20, each workpiece 26 is immersed in the tank 4b and the tank 3, respectively, to be processed.

During processing in each tank 3, 4b, a new workpiece 26 is hung on the next hanger 25 from the loading position L. When the processing in each tank 3, 4b is completed, the work rail 21 and the claw feeding device 23 are raised. Subsequently, the claw 24, the feeding device 30, and the feeding device 70 move, and each workpiece 26 is moved to the next step. Each workpiece 26 is placed on the paint collection tank 5, the electrodeposition paint tank 4b, and the pure water treatment tank 3, and then the feeding device 30 is placed on the tank 3, and the delivery device 70 is placed on the tank 4.
b Return to top. As the path 2 is lowered by the device 20, each workpiece 26 is processed in its respective tank 3, 4b, 5.

Thereafter, the workpiece 26 is moved to the drive balance device 2 in the same manner.
By the vertical movement by the 0, the sliding movement in the two directions of the path by the claw 24, and the movement of the feeding device 30 and the feeding device 70, the materials are sequentially fed into each processing step and processed. Further, at the loading position L, a new work 26 is loaded every time each work 26 is fed at a constant pitch, and the processing is continued. The workpiece 26 that has reached the unloading position U after the processing is completed is removed from the hanger 25.

In FIG. 1, gloss treatment is also performed, but if it is not necessary, the tank 8 is pulled out to the position indicated by the imaginary line 8'.

(Effect of the invention) Multiple electrodeposition tanks (electrodeposition paint tanks 4a, 4b, 4c)
are arranged in a line along the conveyance path 2, and the workpiece 26
A feeding device 30 for transporting the workpiece 26 from the previous process position to a predetermined electrodeposition tank along the rail 21, and a sending device 70 for transporting the workpiece 26 from the electrodeposition tank to the next process position along the rail 21 were provided. (a) Change of paint can be done quickly and easily.

(b) There is no need to secure a large space for switching.

(c) The automation mechanism can have a simple configuration.

(Another embodiment) (a) The number of electrodeposition paint tanks is not limited to three, and any number may be used as long as it is plural.

(b) The tanks 4a, 4b, 4c may be arranged in the curved portion of the route 2.

(c) Route 2 does not have to be circular. In this case, when loading the work 26, it is necessary to also attach the hanger 25.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of an automatic electrodeposition coating processing apparatus according to the present invention, FIGS. 2 and 3 are a schematic cross-sectional view and a detailed cross-sectional view of FIG. 2, and FIG. be. 2...Transport route, 4a, 4b, 4
c...electrodeposition paint tank (electrodeposition tank), 21...rail,
24...nail, 26...workpiece, 30...feeding device, 70...feeding device.

Claims (1)

[Claims] 1. In an automatic electrodeposition coating processing device that is equipped with a claw-feeding workpiece transport mechanism in which workpieces are transported on horizontal rails at a constant pitch, the workpieces are transported one after another between each processing process. electrodeposition tanks are arranged in a line along the conveyance path, and a feeding device transports the workpiece from the previous process position to a predetermined electrodeposition tank along the rail, and a transfer device transports the workpiece from the electrodeposition tank to the next process position. and a delivery device for conveying along the rail.