JPH0227901Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an automatic coating device for applying sealants and adhesives to flat joint surfaces of parts of vehicles, general equipment, etc. More specifically, the present invention relates to an automatic coating device of a tracing type in which a magnetic roller is brought into close contact with a template and a sealing agent or the like is applied from a guided discharge nozzle.

FIG. 4 is an explanatory diagram of a method of applying a sealant, etc. to the joint surface of the object to be coated in such an automatic coating device.
While discharging the sealant etc. 3 from and applying it onto the joint surface 1-1, the discharge nozzle 2 is moved along the joint surface 1-1 by the above-mentioned tracing method, and the sealant etc. is applied to the entire circumference of the joint surface 1-1. It is something.

<Prior art> Generally, using an automatic coating device as described above,
When applying a sealant or the like to a joint surface of an object to be coated, the sealant or the like may be missing in the gap between the discharge start point and the discharge end point of the discharge nozzle.

To solve this problem, the following two methods are currently proposed.

The first method is to set the discharge start point and discharge end point of the discharge nozzle at the same point on the joint surface 1-1.
FIG. 5 is an explanatory diagram of this method, and 4 is the starting point and ending point of ejection. From this point, the discharge nozzle 2 moves in the direction of the arrow along the template 5 and makes a complete circuit, applying a sealant or the like 3 on the trajectory 6. With this method, there are no defects and the coating can be applied reliably.

However, since the discharge end point is on the joint surface, the discharge nozzle must remain on the object to be coated, and each time the object to be coated 1 is attached or removed, the discharge nozzle 2 is moved as shown by the solid line in Fig. 6. Therefore, the object to be coated must be retracted to the outside of the object to be coated or the object to be coated must be slid to a position where there is no problem in attaching and removing the object, which has drawbacks such as complicating the mechanism and wasting time required for retraction.

In the second method, the template itself is provided with a movement course for retracting the discharge nozzle 2, and FIG. 7 shows a part of the retraction course of the template of this method. 7 is a template for this purpose, 8 is a magnetic roller that moves along the inside of the template, and 6 shown by a chain line is the locus of movement of the discharge nozzle 2. 7-1 is an evacuation route of the template 7 for evacuation of the discharge nozzle. The trajectory of the discharge nozzle 2 at the entrance/exit part of this evacuation route 7-1 traces 1/4 of the circumference and enters the trajectory 6 inside the template 7, so the sealant is applied to the trajectory 6 as shown by the arrow in this part. Coating defects such as these may occur. In order to prevent this, a method is used in which the discharge nozzle 2 is temporarily stopped at the end point of the coating trajectory and an excess sealant or the like 3 is discharged to fill in the missing portion during bonding. For this reason, it is necessary to use more sealant than necessary, and the additional work of wiping off the excess sealant as it often spills out during bonding is additionally required, as well as the work of temporarily stopping the discharge nozzle 2. Added to this was the loss of time, which became a problem.

<Problems to be solved by the invention> The present invention was made to solve such problems, and it is possible to prevent the dispensing nozzle from missing by a series of movements before the start point and after the end point of the application. To provide an automatic coating device that moves to the outside of the object to be coated and facilitates attachment and detachment of the object to be coated.

<Means for Solving the Problems> The present invention solves these problems by a method whose main parts are shown in FIG. 1. That is, in an automatic coating device, a magnetic roller is provided that moves closely along the inner circumference of a template, a discharge nozzle is fixed to this magnetic roller, and the discharge nozzle is guided as the magnetic roller moves. , A slide gate is provided on a part of the inner circumference of the template to constitute a magnetic roller retraction part of a loop-shaped passage by the template and the guide plate, and to alternately close the two entrances and exits of this loop-shaped passage. It is.

<Embodiment> FIG. 2 is a side view of an embodiment of the present invention, and FIG. 3 is a plan view thereof. The device of this embodiment has a base 13
A top plate 15 is held by a support 14 erected above. A template 9 is fixed to the top surface of the top plate 1. The template 9 and the guide plate 10 form a magnetic roller retraction part of the loop-shaped passage 11, and the guide plate 10 is held in this magnet roller retraction part by a fixed arm 16 from the top plate 15. . Either one of the entrances and exits of this loop-shaped passage 11 is closed,
A slide gate 12, the other of which is kept open, is provided so as to be able to slide on the cylinder 17.

On the other hand, directly above the bonding surface 1-1 of the workpiece 1 fixed on the base 13, a drive unit 18 provided with a discharge nozzle 2 is held vertically by a drive mechanism 19, a drive arm 20, and a driven arm 21. A magnetic roller 8 is mounted on the top of the drive unit 18.
is attached by a vertical shaft. This magnetic roller 8 guides the drive unit 18 closely inside the template 9 in a tracing manner.

When the magnetic roller 8 of the drive unit 18 is stopped at the innermost part of the loop-shaped passage 11 (position a in FIG. 1), the object 1 to be coated is fixed at a fixed position on the base 13 and the coating operation is performed. Let it start. In this case, the slide gate 12 is in the entrance closed state as shown in FIG. Move with. At this time, the magnetic roller 8, that is, the discharge nozzle 2
The discharge of the sealant, etc. 3 is started immediately before it passes the discharge start point (also the discharge end point) 4. When the magnetic roller 8 comes to the entrance of the loop-shaped passage 11, the entrance is closed by the slide gate 12 as shown in FIG. 1B, so it passes through as it is. When the magnetic roller 8 passes through this inlet, the slide gate 12 closes the outlet of the loop passage 11 by means of the cylinder 17 as shown in FIG. 1A, and opens the inlet.

When the magnetic roller 8 closely circles inside the template 9 and reaches the exit of the loop-shaped passage 11, this exit is closed, so it passes through as it is and reaches the discharge end point (also the discharge start point) 4. Immediately after passing, the discharge of the sealant etc. 3 is stopped, and the magnetic roller 8 comes to the entrance of the loop-shaped passage 11. At this time, since the inlet is open, the magnetic roller 8 enters the loop-shaped passage 11, stops at the innermost part (the position shown in FIG. 1A), and completes one cycle.

In addition, although the start and stop of the discharge of the sealant etc. 3 in the above explanation were set immediately before passing the discharge start point and immediately after passing the discharge end point, if the discharge start and stop were longer than the above, the overlapping section as front and rear would be lengthened. It's okay.

<Effects of the invention> According to the device of the present invention, the discharge nozzle always retreats to the outside of the object to be coated and stops during a series of discharge operations, so it is not only easy to attach and remove the object to be coated; Since no missing parts occur in the application of the sealant, etc., and the overlapping part of the application can be adjusted to be minimized, wasteful consumption of the sealant, etc. can be prevented.

Further, the discharge nozzle is stopped only at a position for one cycle of a series of operations, and no special evacuation mechanism is provided, so that the apparatus can be simplified.

[Brief explanation of the drawing]

FIGS. 1A and 1B are explanatory diagrams showing the outlet closed state and inlet closed state of the main parts of the coating device of the present invention, respectively;
Figure 2 is a side view of the coating device of the present invention, Figure 3 is a plan view, Figure 4 is a diagram of the relative relationship between the object to be coated and the discharge nozzle, and Figure 5 is the conventional discharge nozzle of the first method. FIG. 6 is a diagram showing the relative relationship between the object to be coated and the discharge nozzle, and FIG. 7 is an explanatory diagram of the main parts of the second conventional method. 2...Discharge nozzle, 8...Magnetic roller, 9...Template, 10...Guidance plate, 11...Loop-shaped passage, 12...Slide gate.

Claims (1)

[Scope of utility model registration request] In an automatic coating device, a magnetic roller is provided that moves closely along the inner circumference of a template, a discharge nozzle is fixed to the magnetic roller, and the discharge nozzle is guided as the magnetic roller moves, This template is attached to a part of the inner circumference of the template to form a magnetic roller retraction part of a loop-shaped passage by using a guide plate, and a slide gate is provided to alternately close two entrances and exits of this loop-shaped passage. Features automatic coating equipment.