JPH04322769A - Coating method for work - Google Patents

Abstract

PURPOSE:To obtain a coating method for a work by which this work is coated with different colors while practicably inhibiting deterioration of productivity of the work. CONSTITUTION:In a coating method for a work, both a coating injecting means 20 for injecting coating to the carried and transferred work W and a device main body 10 are provided. This device main body 10 is freely rockingly provided along the transfer direction of the work W. In a time for starting coating of the work W, the device main body 10 is tilted to the downstream side in the direction for carrying the work W. Further in a time for finishing coating of the work W, the device main body 10 is tilted to the upstream side in the direction for carrying the work W.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for spraying paint onto a workpiece that is conveyed and moved by a paint spraying means provided in an apparatus body.

0002

[Prior Art] Normally, when painting a workpiece being transported on a painting line or the like, a paint spraying means is moved in a manner perpendicular to the transporting direction of the workpiece to efficiently paint the workpiece. There is.

FIGS. 6(a) to 6(c) conceptually show a painting line L for a work W to which this type of painting method is applied. In this painting line L, an apparatus body 1 is erected in a side area of the line L, and a painting gun 2 is disposed on the apparatus body 1 so as to be movable in the vertical direction.

In the above-mentioned painting line L, when the painting gun 2 is moved up and down appropriately in accordance with the transportation movement of the automobile body W, the entire outer surface of the automobile body W is coated as shown in FIG. 6(d). The coating is applied efficiently.

[0005]

[Problems to be Solved by the Invention] By the way, in recent painting lines L, in order to cope with the production of a wide variety of workpieces W in small quantities, the workpieces W are painted in different colors on the same line L. There is.

When painting the workpieces W in different colors, the painting gun 2 is cleaned and the paint supply tank (not shown) is cleaned between the end of painting the workpiece W and the start of painting the next workpiece W'. ) will require time to switch.

For this reason, conventionally, this time has been secured by increasing the arrangement pitch A between the works W and W' in the painting line L. If it takes too long, the productivity will drop significantly.

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to provide a method for painting a workpiece, which allows workpieces to be painted in different colors while suppressing a decrease in workpiece productivity as much as possible.

[0009]

[Means for Solving the Problems] The method for painting a workpiece according to the present invention includes a paint spraying means for spraying paint onto the workpiece being transported, and a paint spraying means that supports the paint spraying means and supports the paint spraying means to spray paint onto the workpiece being transported and moved. and a device body disposed in a swingable manner, the device body is tilted downstream in the transport direction of the workpiece when starting painting the workpiece, and the device body is tilted downstream in the transport direction of the workpiece when painting the workpiece is finished. It is tilted upstream in the transport direction.

0010

[Function] According to the above configuration, by tilting the device body downstream in the conveyance direction of the workpiece, the time to start painting the workpiece is delayed, and by tilting the device body upstream in the conveyance direction of the workpiece, Painting can be finished sooner.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on drawings showing embodiments. 1 to 3 conceptually show a painting line L for an automobile body (work) W to which the painting method according to the present invention is applied, and this painting line L is shown in FIG.
As shown in FIG.
, 10.

As shown in FIG. 4, the device bodies 10, 10 have a pair of wheels 11, 11, 11,
11, and swinging parts 10b, 10b which are swingably supported by the moving parts 10a, 10a via shaft members 12, 12. , 11 . . . along the conveyance direction of the painting line L. Swinging part 10b, 1
0b are pulleys 13, 13 and belts 14, 14, respectively.
and reversible motors 16, 16 via pulleys 15, 15.
The reversible motor 1
6 and 16, it is oscillatedly moved along the conveyance direction of the painting line L.

Furthermore, these apparatus bodies 10, 10 are provided with coating gun units (paint spraying means) 20, 20 on one side of the swinging portions 10b, 10b, respectively. As shown in FIG. 3, the painting gun units 20, 20 each have a rectangular shape, and have a plurality of paint injection ports 2 on opposing surfaces.
0a, 20a..., and the swinging parts 10b, 10
b is arranged so as to be movable along the longitudinal direction.

In the painting line L configured as described above, the above-mentioned reversible motors 16, 16 are operated, and as shown in FIG.
As shown in a), the swinging portion 10b of the device main body 10, 10
, 10b are swung and each is tilted toward the downstream side (to the left in FIG. 1) in the conveying direction of the painting line L, which is the standby position. From this state, the automobile body W placed on the trolley C is moved. is transported downstream along line L (
Arrow LC in the figure).

When the tip of the automobile body W placed on the trolley C reaches a predetermined position between the device bodies 10, 10, first, the The sensor that is not activated is activated, and the swinging section 10b
, 10b respectively start swinging toward the upstream side (to the right in FIG. 1) in the conveying direction of the coating line L, and (
(direction of arrow X in the figure), the moving parts 10a, 10a each start moving toward the downstream side of the painting line L (direction of arrow Y in the figure). Note that these moving parts 10a, 10a
The moving speed Va and the swinging speed Vb of the swinging parts 10b and 10b are determined based on the conveyance speed Vc of the painting line L, respectively, and both are as shown in FIG. 1(c). The rear end of the body W is the device main body 10,
When reaching the predetermined position of 10, the swinging parts 10b, 10
b is set so that it is inclined exactly toward the upstream side of the painting line L in the conveyance direction.

When the movement of the moving parts 10a, 10a and the swinging of the swing parts 10b, 10b are started, at the same time, the actuators (not shown) of the painting gun units 20, 20 are activated, and the painting starts. gun unit 20
, 20 move up and down as appropriate (in the direction of arrow Z in the figure) in response to the conveyance movement of the automobile body W, and the respective injection ports 2
Coating of the automobile body W is started by spraying paint from 0a, 20a, . . . toward the automobile body W.

At this time, the swinging portion 1 of the device main bodies 10, 10
0b and 10b are the painting lines L, respectively, as described above.
Figure 1 (d)
), the point P1 at which painting starts for the automobile body W is delayed by a distance T1 compared to the one that is not inclined (shown in FIG. 6(d)).

As shown in FIGS. 1(b) and 2, after passing through an intermediate state in which the swinging parts 10b and 10b are upright, the state shown in FIG.
), the swinging parts 10b, 10b are tilted upstream in the conveyance direction of the painting line L, and the rear end of the automobile body W passes a predetermined position between the apparatus main bodies 10, 10. Then, a sensor (not shown) is activated, and the swinging parts 10b, 10b stop swinging, and the moving parts 10a, 10a stop moving.

When the movement of the moving parts 10a, 10a and the swinging of the swing parts 10b, 10b are stopped, at the same time, the injection ports 20a, 20 of the painting gun units 20, 20 are stopped.
The injection of paint from 20a... stops, and the automobile body W
painting is completed.

At this time, the swinging portion 1 of the device main bodies 10, 10
0b and 10b are the painting lines L, respectively, as described above.
1 (d
), the painting end point P2 for the automobile body W is earlier by a distance T2 than that for a non-slanted body (shown in FIG. 6(d)).

When the painting of the automobile body W is completed, the reversible motors 16, 16 rotate in the opposite direction, and the swinging parts 10b, 10b of the device bodies 10, 10 move as shown in FIG.
It is returned to the standby position as shown in a), and the above-described operations are repeated to sequentially paint the automobile body W.

According to the above-described painting line L, by tilting the swinging parts 10b, 10b of the apparatus bodies 10, 10, the painting start point P1 is delayed and the painting end point P2 is brought forward, so that the next The distance (T1+T2
) minutes will be available. Therefore, if you use this free time, you can
The injection ports 20 of the painting gun unit 20 can be fixed without increasing the arrangement pitch between the automobile bodies W in the painting gun unit 20.
a, 20a, . . . and the paint supply tank (not shown) can be changed, it is possible to paint the automobile body W in different colors without reducing productivity.

[0023] In the above embodiment, the automobile body W
Although the method of painting is exemplified, the present invention can of course be applied to the case of painting other works. Further, although the coating gun 20 is movably disposed relative to the apparatus main body 10 and is moved during painting, the coating gun does not necessarily need to be moved relative to the apparatus main body. In this case, it is preferable that a plurality of painting guns be arranged in the longitudinal direction of the apparatus main body.

Furthermore, in the embodiment described above, since the apparatus main body 10 is made to follow the workpiece W by moving the moving part 10a, it is possible to prevent the painting interval from increasing due to the swinging of the apparatus main body 10. However, in the present invention, it is not always necessary to make the apparatus main body follow the workpiece.

Further, in the above embodiment, the swing center 12 of the device main body 10 is provided at the lower portion thereof, but the swing center may be provided at the upper portion of the device main body. Furthermore, although the rotation of the reversible motor 16 is used as a method for swinging the device body 10, the present invention is not limited to this. For example, as shown in FIG. 10
The actuating rod 30a of the cylinder actuator 30 is connected to the side surface of the swinging portion 10'b at
The swinging section 10'b may be swung by the reciprocating movement of 0a, or as shown in FIG.
A long hole 10'' is provided along the longitudinal direction of the swinging portion 10''b of the
A cylindrical member 40 is engaged with this elongated hole 10''c, and an actuation rod 41a of a cylinder actuator 41 is connected to the cylindrical member 40, and the reciprocating movement of the actuating rod 41a causes the swinging portion to move. 10''b may be swung.

[0026]

As explained above, according to the method for painting a workpiece according to the present invention, by tilting the apparatus body toward the downstream side in the conveyance direction of the workpiece, the time to start painting the workpiece is delayed, and the apparatus body is By tilting the workpiece upstream in the conveyance direction, the time point at which painting is finished on the workpiece is brought forward, so that the workpieces can be painted in different colors while suppressing a decrease in productivity as much as possible.

[Brief explanation of the drawing]

1(a) to 1(d) are conceptual side views sequentially showing a method of painting a workpiece according to the present invention. FIG.

FIG. 2 is a perspective view conceptually showing a workpiece painting method according to the present invention.

FIG. 3 is a front view conceptually showing the workpiece painting method according to the present invention.

FIG. 4 is a side view conceptually showing the main body of the apparatus applied to the workpiece painting method according to the present invention.

5(a) and 5(b) are side views conceptually showing modified examples of the apparatus body applied to the workpiece painting method according to the present invention, respectively; FIG.

6(a) to 6(d) are conceptual side views sequentially showing a conventional workpiece painting method. FIG.

[Explanation of symbols]

10　Device body 20 Paint injection means W Work

Claims (1)

[Claims] 1. An apparatus comprising: a paint spraying means for spraying paint onto a workpiece being transported; and an apparatus main body supporting the paint spraying means and swingably disposed along the moving direction of the workpiece; A workpiece characterized in that the apparatus body is tilted downstream in the conveyance direction of the workpiece when painting of the workpiece starts, and the apparatus body is tilted upstream in the conveyance direction of the workpiece when painting of the workpiece is finished. How to paint.