JPH07204546A - Coating device - Google Patents

Abstract

PURPOSE:To uniformly and automatically apply a coat onto a work by releasing a support by a pin of a hanger to hold the work with a holding mechanism and providing a spray gun at a place spraying a coating material in a rotary axial center direction when the work is rotated by a rotary mechanism. CONSTITUTION:A wheel W is moved to a base 1 side by a conveyor C, and when a thing that the wheel is moved to a central position between both rollers 7a and 7b is detected, a lower part H' of the hanger H is held and both rollers 7a and 7b are moved to downwards of the wheel W. Then, a movable table is lifted in a specific amount to mount between both rollers 7a and 7b, and the table is retreated to pull-out from the pin P of the hanger H. Then, both rollers 7a and 7b are rotated to rotate the wheel W, and the coating material is sprayed from the spray gun 9 placed at the rotary axial center to apply a coat onto the wheel W. In this coating, since the wheel W is rotated, the coating application is executed uniformly even if projecting and recessing parts present at the wheel W. Then, a reverse operation is executed to support the wheel W to the pin P, then the wheel W is transported to a next place.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating apparatus, in which a work conveyed by a trolley conveyor is removed so that coating can be automatically performed.

[0002]

2. Description of the Related Art Conventionally, for example, in a painting process in which a wheel is manufactured by being supported by a hanger provided on a trolley conveyor (hereinafter referred to as a conveyor) and passing through each manufacturing process, such as an automobile wheel. The worker removes the wheel from the hanger and places it on a horizontal turntable,
The spray gun is used to spray paint onto the rotating wheel from above.

[0003]

However, since the above-mentioned conventional coating process is performed manually by an operator, it requires skill and automation is desired.

Particularly, in the coating process, since the work piece is placed horizontally, it is difficult for the spray liquid of the paint to flow in a certain direction, and the spray liquid is scattered and convection is a poor working environment. Was wanted.

The coating apparatus according to the present invention has been made in order to meet the above-mentioned demand, and an object thereof is to provide a coating apparatus capable of uniformly and automatically coating a work. .

[0006]

In order to achieve the above-mentioned object, a coating apparatus according to the present invention makes a work supported by a pin of a hanger provided on a conveyor parallel to the axial direction of the work. In addition, a pair of horizontally provided rollers are moved upward to release the support by the pins, a holding mechanism, a rotating mechanism that rotates the rollers to rotate the work, and a rotating mechanism. And a spray gun provided at a position for spraying the paint in the direction of the rotation axis of the work when the work rotates. Further, the holding mechanism is characterized in that, after advancing to a position below a pin of the hanger, the pair of rollers is moved upward and then retracted. Further, it is characterized by having a fixing mechanism for stopping the movement of the hanger when the holding mechanism moves forward or backward.

[0007]

In the above structure, when the holding mechanism releases the work from the support of the pin and the rotating mechanism rotates the work, the paint is sprayed from the spray gun to the work.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of the apparatus of one embodiment, and FIG. 2 is A of FIG.
FIG.

A hanger H is provided at a predetermined interval on the conveyor C, and a pin P of the hanger H is
A wheel W that supports the work of the present invention is supported.

For simplification of the drawing, only one hanger H is shown, and among the plurality (two in the illustrated example) of pins H, H of the hanger H, the one at the bottom is shown. The wheel W is supported only on the pin P.

The base 1 is a hydraulic cylinder piston (hereinafter,
2), as indicated by the arrow
It is configured so that it can reciprocate in a direction parallel to the moving direction of the conveyor C.

A holding mechanism 3 and a fixing mechanism 2 are mounted on the base 1.
0 and are provided.

Movement of the holding mechanism 3 in the direction parallel to the moving direction of the conveyor C is restricted by the frames 4a to 4d, and as shown by the arrow, the holding mechanism 3 is moved by the piston 5 in the direction orthogonal to the moving direction of the conveyor C. It has a movable base 6 that reciprocates.

On the moving table 6, a pair of rollers 7a having the same shape are arranged with the axial direction orthogonal to the moving direction of the conveyor C and horizontally, with a space slightly smaller than the diameter of the wheel W. , 7b are rotatably provided so as to project toward the conveyor C side.

A motor M is provided on one of the rollers 7a and 7b (roller 7b in the illustrated example), and a drive shaft 7 for both rollers 7a and 7b is provided.
Sprockets 8a and 8b are provided on a'and 7b ', respectively. And those sprockets 8a, 8
A chain 9 is stretched over b, and both rollers 7a, 7
b is configured to rotate in the same direction at the same time.

Therefore, the wheel W is placed on both rollers 7a and 7b, and when both rollers 7a and 7b rotate, the wheel W can also rotate.

In the figure, reference numeral 9 denotes a spray gun (hereinafter referred to as a gun) for spraying a paint, which is provided on a movable table 6 at a central portion between the rollers 7a and 7b, and which sprays paint from a paint tank (not shown) It is configured so that it can be ejected toward the conveyor C side.

The fixing mechanism 20 is provided on the base 1 located below the conveyor C and in the center between the rollers 7a and 7b.

The fixing mechanism 20 comprises a stopper 21 fixed to the base 1 and a piston 22 provided on the base 1, and a lower portion H'of the hanger H can be held in a direction orthogonal to the moving direction of the hanger H. Is configured.

In FIG. 2, reference numeral 30 is a piston provided on a top plate 4e for connecting the upper portions of the frames 4a to 4d,
The moving table 6 can be moved up and down through the connecting member 31 as shown by the arrow.

Therefore, when the movable table 6 moves up and down, both rollers 7a and 7b can move up and down together.

The pistons 2, 5, 22, 30 and the motor M are configured to be driven and controlled by a controller (not shown) which is mainly composed of a microcomputer for controlling the apparatus of the present embodiment as a whole. There is.

Next, the operation of the apparatus of this embodiment will be described with reference to the explanatory view of FIG.

(A) The wheel W moves toward the base 1 by the conveyor C.

(B) The wheel W has both rollers 7a and 7b.
When it is detected by a sensor (not shown) that it has moved to the central position between the two, the piston 22 operates to hold the lower portion H'of the hanger H, and the piston 5 operates to move both rollers 7a, 7b to the wheel. Move below W. Further, the piston 2 moves the base 1 at the same speed as the conveyor C and in the same direction as the moving direction of the conveyor.

(C) The piston 30 operates to lift the movable table 6 by a predetermined amount, that is, the rollers 7a and 7b mount the wheel W and the pin P of the kangar H does not support the wheel W.

(D) While maintaining the state of (c) above, the movable table 6 is retracted by the piston 5 until it returns to its original position.

(E) Both rollers 7a and 7b are driven by the motor M.
Is rotated to rotate the wheel W, and paint is sprayed from the gun 9 to coat the wheel W.

In this coating, since the wheel W rotates, even if the wheel W has irregularities, the coating is performed uniformly.

(F) The wheel W is inserted into the pin P by performing the operation opposite to the above (d).

(G) The wheel W is supported by the pin P by performing the operation opposite to the above (c).

(H) The operation opposite to the above (b) is performed to retract the movable table 6 and the piston 22. As a result, the hanger H becomes free and can be moved by the conveyor C. Then, the wheel W is conveyed to the next processing step by the conveyor C.

Further, the base 1 is returned to the original position by the pinston 2 and is in a standby state for the next wheel W.

As described above, according to the apparatus of this embodiment, the wheel W conveyed by the conveyor C can be automatically painted. Moreover, the wheel W has both rollers 7a and 7b.
Since it is rotated by, uniform coating can be performed without uneven coating.

Although the movable table 6 is moved to the conveyor C side in the above embodiment, this movement may be omitted.

That is, the movement of the movable table 6 by the piston 5 is omitted, that is, (a), (b), (h) in FIG.
May be omitted.

However, as in the above-described embodiment, the movable table 6
There is an advantage that the paint does not adhere to the pin P when the is moved.

In the above embodiment, the base 1 is moved by the piston 2 in synchronism with the moving speed of the conveyor C, but this may be asynchronous.

That is, the piston 2 removes the wheel W from the pin P (see (b), (c), and (d) of FIG. 3) and inserts the painted wheel W into the pin P (see FIG. 3). 3 (f), (g), (h)), the base 1 is driven so as to be in a predetermined position, and the wheel W is being coated (see FIG. 3).
(See (e)), the hanger H may be freely movable by the conveyor C. In this case, the base 1
The advantage is that no control action is required to synchronize the C with the conveyor C.

Further, in the above-mentioned embodiment, the wheel W is mounted by the pair of rollers 7a and 7b, but the centering mechanism 40 as shown in FIG. 4 may be used. Good.

That is, the centripetal mechanism 40 includes a frame 6a having a pair of rollers 7a and 7b, and the frame 6a.
A frame 6b provided at an upper position facing the roller 7c, 7d corresponding to the pair of rollers 7a, 7b.
And each of the frames 6a and 6b are connected by link bars 6c and 6d. The rollers 7a to 7c are connected by a sprocket and a chain (not shown) so that they can rotate in the same direction.

When a piston (not shown) provided between the frames 6a and 6b is actuated, the wheel W always sets the center position to a predetermined position and the four rollers 7a ...
It is stably and rotatably held by 7d. When the rollers 7a to 7d rotate, the wheel W can also rotate reliably.

In the above-mentioned embodiment, an example of coating the wheel W supported by the lower pin P is shown, but the coating of the wheel W supported by the upper pin P is carried out by the same device as the above, not shown. Done in. Although the work is a wheel, other works can be applied as long as they can be set on the rotating jig even if the outer diameter is not cylindrical.

[0044]

According to the present invention, the work supported by the pins of the hanger provided on the conveyor is moved upward by a pair of rollers provided in parallel with the axial direction of the work and horizontally. Then, a holding mechanism for releasing and holding the support by the pin, a rotation mechanism for rotating the roller to rotate the work, and a rotation axis direction of the work when the work is rotated by the rotation mechanism. Since it is composed of a spray gun provided at a position for spraying paint, the work conveyed by the conveyor can be painted automatically without causing uneven coating. Also, after advancing the holding mechanism to the position below the pin of the hanger,
When the pair of rollers are moved upward and then retracted, the paint is not attached to the pins. Further, when the holding mechanism has the fixing mechanism that stops the movement of the hanger when moving forward or backward, there is an advantage that the work can be reliably taken out from the pin and the work can be inserted into the pin.

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic configuration of an apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an explanatory diagram for explaining the operation of the device.

FIG. 4 is a front view of a centripetal mechanism.

[Explanation of symbols]

 1 Base 2 Hydraulic Cylinder Piston (Piston) 3 Holding Mechanism 5 Piston 6 Moving Platform 7a to 7c Roller 20 Fixing Mechanism 30 Piston M Motor W Wheel (Work) C Trolley Conveyor (Conveyor) H Hanger P Pin M Motor

Claims (3)

[Claims] 1. A work supported by pins of a hanger provided on a trolley conveyor is moved upward by a pair of rollers provided parallel to the axial direction of the work and horizontally. A holding mechanism for releasing and holding the support by the pin, a rotating mechanism for rotating the roller to rotate the work, and a spraying paint in a rotation axis direction of the workpiece when the work is rotated by the rotating mechanism. And a spray gun provided at a position where 2. The coating apparatus according to claim 1, wherein the holding mechanism moves the pair of rollers upward after advancing to a position below the pin of the hanger and then retracts the rollers. 3. The coating apparatus according to claim 2, further comprising a fixing mechanism that stops the movement of the hanger when the holding mechanism moves forward or backward.