JPS625251Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a paint injection device used for painting.The purpose of the invention is to prevent paint clogging of the injection nozzle and automate the detection of a predetermined pattern width in automatic painting, and improve work efficiency and painting quality. This is what we aimed for.

Conventionally, in automatic painting machines, the width of a paint spray pattern has been measured manually by applying a scale to a nozzle, spraying paint from a predetermined distance, and then measuring the condition using the scale. In addition, the paint used for undercoating, soundproofing, and rustproofing automobile bodies contains fibers and is highly viscous, so the nozzle can become clogged, so the nozzle must be removed and cleaned each time or periodically. was. Therefore,
Measurement of the pattern width and cleaning of the nozzle had a negative impact on improving work efficiency, and there were cases where products with defective coating quality were produced.

This invention solves the above-mentioned conventional problems.
It automatically cleans the nozzle and measures the pattern, and fully automates automatic painting.

Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 1, 1 is an actuating device, and 2 is an arm that is automatically controlled by the actuating device 1, and has a paint spray nozzle 3 (hereinafter referred to as a nozzle) at its tip.

In the present invention, a cleaning liquid tank 4 containing, for example, white gasoline is installed on the actuating device 1, and a pattern measuring device 5 is arranged in parallel on the side of the actuating device 1. As shown in FIG. 2, this pattern measuring device 5 has phototubes 6 installed at predetermined intervals. Although not shown, the phototube 6 may be installed in a movable structure so that the gap between the phototubes 6 and 6 can be adjusted.

Next, the operation of the present invention will be explained. For example, when performing undercoat painting on an automobile body flowing on a line, the arm 2
It is returned to the original position shown by the solid line in the figure. This arm 2
In the original position, the nozzle 3 is immersed in the cleaning liquid tank 4, and self-cleans by dissolving the paint adhering to the vicinity of the injection hole.

Next, before proceeding to the painting process, the arm 2 moves the nozzle 3 to the position of the pattern measuring device 5 as shown by the dotted line in FIG. 1, stops at a distance of, for example, 300 mm, and performs a trial spray. As shown in Fig. 2, the pattern width 7 resulting from this trial injection is determined by the phototube 6 to determine whether it is the same as the set width or not. If it is smaller than the set width, it is an abnormal pattern width and the paint is not being ejected normally. When it detects that the cleaning liquid is in a clogged state, it is returned to the cleaning liquid tank 4 and an abnormality signal is sent to notify the operator, so that sufficient cleaning can be carried out.
Incidentally, when it is determined that the pattern width is normal, the arm 2 moves to a position corresponding to the object to be coated and starts the painting operation.

In this way, according to the present invention, the cleaning of the nozzle and the measurement of the pattern width are automatically performed, which eliminates the manual cleaning and pattern width measurement required by workers in the past. In addition to cleaning the pattern each time it is returned to its original position, the pattern width is also measured before starting the painting process, which prevents paint from clogging and allows painting only with the normal pattern width, resulting in consistent quality painting. It has the advantage of being fully automatic.

[Brief explanation of the drawing]

FIG. 1 is a side view of the device of the present invention, and FIG. 2 is an enlarged view of the portion seen in the direction of the arrow in FIG. DESCRIPTION OF SYMBOLS 1... Actuation device, 2... Arm, 3... Paint injection nozzle, 4... Cleaning liquid tank, 5... Pattern measuring device, 6... Phototube.

Claims (1)

[Scope of utility model registration request] A paint spray nozzle is provided at the tip of an arm controlled by an actuator, and a cleaning liquid tank for the paint spray nozzle is installed on the actuator, and the paint spray nozzle is placed at a fixed position to control the width of the pattern sprayed from this. A paint spraying device characterized in that a pattern measuring device for measuring with phototubes arranged at prescribed intervals is arranged in parallel with the actuating device.