JPS588358Y2 - Triyouno - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic paint supply control device, and more specifically, when an object to be coated is automatically coated with a reciprocating sprayer, the present invention provides a simple means for controlling the paint supply to the sprayer. The present invention relates to an improvement in an automatic paint supply control device that can be reliably and easily supplied.

Conventionally, this type of device has been widely used in automatic painting using a reciprocating sprayer to automatically form a coating area that conforms to the shape of the article to be coated.

However, paint supply control in conventional equipment requires phototubes,
A reed switch, a limit switch, etc., which are commonly referred to as actuating elements among those skilled in the art, are arranged in the required number in accordance with the shape of the article to be coated, and the actuating elements are It is actuated by the moving object to be coated itself, or by a cam plate formed according to the shape of the object to be coated, and the actuation signal obtained thereby is transmitted to the needle valve of the sprayer, or This was done by transmitting the information to a paint control valve installed at an appropriate location in the paint supply pipe.

However, with the former method, it is practically impossible to arrange the actuating elements in a way that completely corresponds to the shape of the article to be coated, so it is difficult to adjust the setting position of the actuating elements 11 and the ON position of the sprayer.
A time lag inevitably occurred at -0FF, and there was a large loss of paint that could not be ignored.

Incidentally, this problem of time lag is not preferable in terms of forming a uniform coating film on the article to be coated.

Furthermore, in this method, if the actuating element is placed near the painting area of the article to be painted, it will be contaminated with paint particles, resulting in a problem of decreased operational sensitivity, so it is necessarily placed at a location away from the painting area. The adjustment is inconvenient, and the equipment is expensive.

On the other hand, in the latter method employing a cam plate, the actuating element is actuated by a cam plate formed substantially in the same shape as the article to be coated, so the problem of time lag during paint control is solved. However, since highly accurate cam plates are required in number corresponding to the shape of the object to be coated, the cost of the equipment is inevitably high.
As is clear from its structure, it can only target objects with a predetermined shape, and it is not possible to change the reciprocating stroke of the sprayer during the painting process. Improper suspension of the coated article often results in incomplete coating formation.

The present invention is provided for the purpose of eliminating the drawbacks of the conventional apparatuses described above.According to the present invention, in an apparatus for automatically controlling paint supply to a reciprocating sprayer, The device includes an actuating piece, one end of which is fixed to a shaft member that is rotatably driven at a speed equivalent to or proportional to the driving speed of the reciprocating atomizer, and the actuating piece is rotatable along a rotational drive path. An automatic coating material supply control device is provided, characterized in that it is formed by two or more actuating elements disposed.

In the present invention, the actuating piece does not have any complicated shape corresponding to the shape of the article, but has a shape that can reliably operate a switch generally called an actuating element such as a reed switch or a limit switch for a relatively short period of time. This is a general term for rods or plate members.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic configuration diagram showing an example of an automatic coating machine,
A paint sprayer 1 is held by a drive chain 2 and is reciprocated vertically in parallel with the surface of the article to be coated.
The chain 2 is driven in circulation by a suitable electric motor 3.

4 is a chain drive sprocket, and 5 is a tensioning sprocket.

The automatic paint supply control device 10 of the present invention is disposed at an appropriate location along the sprayer drive chain 2, and its driving force is generated by a control sprocket 11 meshing with the drive chain 2, reduction gears 12, 13, or a pulley and belt. It is transmitted through a suitable speed reduction device constructed so that it operates synchronously with the movement of the drive chain 2, in other words with the reciprocating movement of the atomizer 1.

14 and 15 are bearing members. One end of the control shaft member 17 is connected to the reduction gear 13, and the other end passes through a counter drum 18 that is arranged concentrically with the control shaft member 17. One end of a pair of actuating pieces 20, 21 is fixed to the control shaft member 17 so as to face the back surface, respectively, and this shaft member 17 and actuating pieces 20, 21 rotate integrally.

The counter drum 18 is fixed stationary relative to the axis 17 by suitable brackets 23,24;
On each of its front and back surfaces, a suitable number of adjuster arms 25, 26, in the illustrated embodiment, a pair of adjuster arms 25, 26, respectively, are provided.
27, 28 are located between the front and back surfaces and the actuating pieces 20, 21 and are rotatably disposed.

Detection switches 30, 31, 32 and 33 serving as operating elements are fixed to each of the adjustment arms 25 to 28 at positions along the rotation path of each of the operating pieces 20 and 21, respectively.
It operates by contacting the free tips of the actuating pieces 20, 21.

Therefore, by rotating the adjustment arm, it is possible to arbitrarily determine the setting position of the detection switch.

In order to determine the set position of the detection switch, a scale or a positioning hole is provided on the circumferential surface of the counter drum 180, and the screws 35 to 38 ( A set knob) is attached to fix the tightening on the drum 18.

Of course, a compression spring may be used instead of a screw for tightening, and in this case, movement is possible by simply pulling the set knob.

The ON/OFF signals of each detection switch serve as operation control signals for the paint supply device, and the paint spray area by the sprayer 1 is controlled.

As described above, the control shaft member 17 and the actuating pieces 20 and 21 are integrally rotated at an equivalent or uniform speed in synchronization with the reciprocating movement of the atomizer, for example, one rotation for each reciprocating movement of the atomizer. In addition, since the setting position of the actuating element can be arbitrarily set and adjusted, it becomes possible to completely freely set or change the coating width performed during one stroke of the sprayer.

This will be explained based on a specific example. When coating the upper half of the entire coating width as shown in Fig. 4A, a pair of detection switches 32 and 33 are installed at 1800 mm intervals as shown in Fig. 5, and the actuating piece 21 is connected to the sprayer and back. It is best to rotate it once.

When painting the intermediate part as shown in Fig. 4B, two pairs of detection switches 30 to 33 and a pair of actuating pieces 2 as shown in Fig. 6 are used.
0.21, the detection switches are arranged at 90° intervals, and the two actuating pieces 20 and 21 are fixed in a position where they overlap in the same direction. Let them do it.

In this way, paint supply control of arbitrary numbers can be performed by a combination of four detection switches, two operating pieces, and rotational speed.

Of course, it is also possible to add more detection switches, or to add more detection switches and operating pieces together with the counter drum.

In the above, the driving force of the drive chain 2 was transmitted via the control sprocket 11, but in addition, the reduction gear 1
2 and the tensioning sprocket 5 may be arranged coaxially.

As the detection element, in addition to a strip switch, a proximity switch, a photoelectric switch, etc., it is also possible to use a mechanical pulp for fluid.

As described above, according to the present invention, the set position of the detection element, in other words, the position of the control operating point, can be adjusted arbitrarily and steplessly by only extremely simple operations such as rotating the adjusting arm and tightening the set knob. Therefore, it is possible to realize an extremely economical and effective automatic paint supply control device that can control the paint supply in response to any shape of the article to be coated.

In addition, since the proposed control device can be installed at any position on the reciprocating path of the sprayer, it can be installed at the height that is most convenient for handling, making adjustment work easier, and even during reciprocating operation, fine adjustment of coating width and Changes can be made freely.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a schematic configuration diagram of an automatic coating machine that employs the automatic paint supply control device of the present invention, Fig. 2 is a cross-sectional view, and Fig. 3 is a front view. Figures 4 and 5
FIG. 6 is an explanatory view of the operation. 1 is a sprayer, 2 is a drive chain, 12 and 13 are reduction gears, 17 is a shaft member, 18 is a counter drum, 20, 21
is an operating piece, 25-28 is an adjustment arm, 30-33
is a detection switch, and 35 to 38 are set knobs.

Claims (1)

[Claims for Utility Model Registration] A device for automatically controlling the supply of paint to a reciprocating atomizer, the device comprising: a shaft that rotates at a speed equivalent to or proportional to the driving speed of the reciprocating atomizer; A paint automatic, characterized in that it is formed of an actuating piece whose one end is fixed to a member, and two or more actuating elements rotatably arranged along a rotational drive path of the actuating piece. Supply control device.