JPH0143188Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an automatic coating type spray device.

Conventionally, spraying of coating molds has been done manually by workers, and automation is desired, but there are problems such as the coating agent tends to clog the nozzle, and it is difficult to detect this clogging and automatically clean it. Because of this, the development of automatic coating spray equipment was delayed.

The present invention aims to solve these problems.

The configuration of the present invention will be explained below based on examples. In Figures 1 and 2, 1 is the arm part of the robot that is set to make predetermined movements;
A pair of support members 2, 2 are fixed to the tip of the arm portion 1 at a constant interval, and a spray gun 4 is supported between the support members 2, 2 via a pin 3. At an upper position inside the spray gun 4, a spindle 5 is suspended and supported by a diaphragm (not shown), and is normally pressed down via the diaphragm by a spring (not shown) to form a coating agent injection hole (described later). 6 (see Figure 3) is closed, but when compressed air is supplied from the air supply hole 7 to the lower side of the diaphragm, the spindle 5 is pushed up against the spring and the injection hole 6 is opened. . Further, the air supply hole 7 is connected to an air supply source via an air pipe 8 provided with an on-off valve (not shown) in the middle. Reference numeral 9 denotes a nozzle portion of the spray gun 4. This nozzle portion 9 will be explained with reference to the detailed diagram shown in FIG. In the portion 10a, a cylindrical member 13 is provided with stepped holes 11 and 12 perpendicularly perpendicular to each other in the upper and lower parts, and a nozzle hole 13a formed in the lower surface concentrically with the stepped holes 11. The large diameter hole portion of the hole 11 is connected to the stepped portion 10a of the cylinder body 10.
It is mated to. In the stepped hole 11, a stepped shaft 15, which has a shaft core through which a mold coating flow path 14 is bored, brings the stepped end surface into contact with the stepped portion of the stepped hole 11, and seals the stepped shaft 15 airtight through an O-ring 16. Furthermore, in the stepped hole 11 between the cylindrical body 10 and the stepped shaft 15, a seat plate 17 having an injection hole 6 in the center is inserted between the cylindrical body 10 and the stepped shaft 15. and is fitted with the injection hole 6 aligned with the flow path 14.

Further, the other stepped hole 12 has a screw hole 18a, and a small hole 18 is provided concentrically with this screw hole 18a.
A rotary member 18 having a shaft 18c protruding from one side and a screw hole 18a and a small hole 1
8b to the injection hole 6, the flow path 14 and the nozzle hole 13.
a, and the shaft portion 18c is held rotatably through an O-ring 19 with the shaft portion 18c protruding outward from the small diameter hole portion of the stepped hole 12.

In the screw hole 18a, a nozzle chip 20 having a fine hole 20a formed concentrically with the screw hole 18a is screwed into contact with the end face of the stepped portion, and the nozzle chip 20 has a through hole approximately concentric with the fine hole 20a. The upper end surface is pressed by a stopper 21 having a stopper 21a to prevent it from loosening upward and coming out. 22 is a rotary drive device that is fixedly supported by one support member 2 and rotates in forward and reverse directions by supplying and discharging compressed air. The proximal ends of the pair of claw members 23, 23 are fitted and fixed, and one end is fitted into the shaft portion 18c between the claw members 23, 23, and is secured to the shaft portion 18c by a set screw 24 to prevent it from slipping out to the outside. The lever 25 rotates between the claw members 23 and 23 by the operation of the rotary drive device 22, and together with the rotating member 18, the nozzle tip 20 and the stopper 21 are rotated 180 degrees in opposite directions. It is designed so that it can be rotated. Further, a sensor 26 is fixedly supported on the outer peripheral surface of the cylinder 10 by a support member 27, and is capable of detecting vibrations generated during spraying as ultrasonic waves and determining whether or not spraying is being performed. Hot, sensor 2
6 is connected to a control device (not shown) via an electric wire 28, and this control device is electrically connected to the on-off valve in the middle of the air pipe 8 and the rotary drive device 22, and the small hole 20a When the pores 20a are clogged with foreign matter, a signal is output from the sensor 26 at the same time as the vibration stops during spraying and is sent to the control device, which together with the opening signal of the on-off valve detects and confirms that the pores 20a are clogged. ing. Reference numerals 29 and 30 are coating agent supply and discharge ports provided on the outer circumferential wall so as to communicate with the inside of the cylinder 10, and communicate with a coating agent supply pump and storage tank (not shown) via piping 31 and 32, respectively. It's connected. 33 is a protective cover.

Next, the operation of the device configured as described above will be explained. A pump (not shown) that pushes down the spindle 5 via a spring and a diaphragm (not shown) to close the injection hole 6 and supplies the coating agent;
In a state where compressed air is circulated between the supply hole 29, the discharge hole 30, the pipes 31, 32, and the storage tank (not shown), compressed air is supplied from the air supply hole 7 to the inside of the spray gun 4, and the diaphragm (not shown) )
When pressure is applied to the lower surface, the spindle 5 is pushed up against the spring (not shown) and the injection hole 6 is pushed up.
As it opens, the mold coating agent flows from the injection hole 6 to the flow path 1.
4. The liquid is sprayed from the nozzle hole 13a toward the surface of the model (not shown) through the through hole 21a, the fine hole 20a, and the small hole 18b. At this time, sensor 26
detects the ultrasonic signal of the vibration generated by the spray, but the nozzle tip 20
When the pores 20a are clogged with foreign matter, the ultrasonic signal of the vibration stops and a signal is output from the sensor 26, and this output signal is sent to the control device (not shown) via the electric wire 28. sent, piping 8
The clogging of the pore 20a is detected together with the opening signal of the on-off valve (not shown) in the middle. Thus pore 2
When clogging is detected, the control device sends a signal to the on-off valve and the rotary drive device 22 to close the on-off valve, stop the supply of compressed air, and push down the spindle 5 to open the injection hole 6. At the same time, the rotary drive device 22 is operated to rotate the lever 25 while being held between the claw members 23, 23, and rotate the rotating member 18, nozzle tip 20, stopper member 21, etc. 180 degrees in the opposite direction.
Turn the stuck foreign object in the opposite direction.

Next, when the on-off valve is reversely operated again to push up the spindle 5 and open the injection hole 6, the foreign matter clogging the fine hole 20a is removed from the coating mold supplied through the injection hole 6, the flow path 14 and the small hole 18b. Through-hole 2 is opened by the pressure of the agent.
1a, the screw hole 18a, and the nozzle hole 13a to be blown out and removed. Thereafter, the on-off valve is closed again and the spindle 5 is pushed down to close the injection hole 6, and the rotation drive device 22 is operated in the reverse direction to reversely rotate the lever 25 and the claw member 23 by 180 degrees to return to the original state. Continue the above spraying operation.

In the above embodiment, the sensor 26 is attached to the cylindrical body 10 of the spray gun 4 to detect vibrations propagated through the cylindrical member 13, the cylindrical body 10, etc. during spraying. It may be provided in the middle of a pipe for supplying or discharging a coating agent to detect vibrations generated from the mold coating agent flowing through the pipe. Alternatively, a sensor that directly detects changes in the flow rate or pressure of the mold coating material may be used.

As is clear from the above explanation, according to the present invention, clogging with foreign matter can be automatically detected and automatically removed, which dramatically improves productivity. This freed workers from working in a bad environment involving harmful substances.
The safety of the workers is ensured, and since the spray gun, sensor, and cleaning device are integrated, the entire device becomes more compact, making it a significant contribution to this type of industry.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1 viewed from below, and FIG. 3 is a detailed sectional view of the nozzle portion.

Claims (1)

[Scope of utility model registration request] A coating agent injection hole 6 is provided on the tip side of the spray gun 4.
A rotary member 18 is rotatably provided with a pore 20a communicating with the rotary member 18, and the rotary member 18 is engaged and connected to a rotary drive device 22 so that the rotary member 18 can be driven to rotate. An automatic coating spray device characterized in that a sensor 26 for detection is electrically connected to an on-off valve for opening and closing the injection hole 6 and to the rotary drive device 22 via a control device.