JPS63137762A - Method for controlling paint emitting quantity of painting gun in painting apparatus - Google Patents

Abstract

PURPOSE:To make the thickness of the film on the wall surface of a building as uniform as possible and to safely perform the work at a high place, by detecting the acceleration and deceleration region of a painting gun by an approximate sensor and controlling the quantity of the paint emitted from the painting gun by the detection signal of said sensor. CONSTITUTION:A high place working vehicle equipped with a control apparatus is placed at a working position and a working stand 5 is set to the front surface of a predetermined wall surface to be painted through an expansible boom. When painting guns 7a, 7b start painting from the position detected by an approximate sensor 10 toward a right-hand direction, the contact 16a of a timer 16 is turned OFF and an electromagnetic air check valve 12 is opened and a flow control valve 13 is opened to emit predetermined paint from both painting guns 7a, 7b. When both painting guns 7a, 7b approach a right-hand sensor 10 by the movement in a right direction, an electromagnetic relay 15 is again operated and the electromagnetic air check valve 12 is brought to a cut-off state to stop the emission of the paint.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for controlling the amount of paint discharged from a paint gun in a painting device that can make the thickness of the paint film as uniform as possible when painting walls of buildings, etc. It is.

[Prior art]

The reality is that current buildings, typified by office buildings, are very high-rise buildings.

Construction of these high-rise buildings involves assembling steel frames,
All work, including concrete pouring, is dangerous and difficult because it involves working at heights.

In particular, since painting work on exterior walls is done outside of buildings, it is more dangerous and difficult than other work at heights.Therefore, in order to overcome these risks and difficulties,
Conventionally, after removing scaffolding etc. from a building, a work platform (gondola) etc. equipped with painting equipment is hung along the wall surface, and the painting worker directly gets on this platform to carry out the specified painting work. Although widely adopted, this type of painting equipment requires workers to directly board a workbench such as a gondola instead of scaffolding to carry out the designated painting work, so it is dangerous to use scaffolding. It is not much different from the method of painting while moving from above.

Therefore, various automatic painting devices are currently being developed to eliminate such risks.

However, although the paint gun used in conventional automatic painting equipment accelerates and decelerates its movement speed at the left and right turning positions, the amount of paint ejected from the paint gun is always constant. Ta.

Therefore, the thickness of the coating film on the painted surface in the left and right acceleration/deceleration regions was extremely uneven, resulting in a very poor coating finish. Therefore, in order to eliminate such inconveniences, the above-mentioned automatic coating equipment, for example, greatly swings the discharge direction of the coating gun outward at the left and right turning points where the movement of the coating gun accelerates and decelerates, so that the coating film is formed on the surface. The reality is that we are trying to prevent more paint from adhering than is necessary.

However, in such cases, it is possible to suppress excessive adhesion of paint to the wall surface by swinging the paint gun outward, but this causes the paint to become mist and scatter into the atmosphere, which poses a major environmental problem. It has become.

In addition, with the above method, the guideline for moving the paint gun becomes uncertain, making it extremely difficult to clearly position the boundary line of the painting, making it unsuitable for painting a wide range of walls, etc. Met.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention is mounted on a movable workbench, etc., and is configured to move a paint gun at a predetermined speed along the wall surface of a building etc. while performing a predetermined coating. In the painting apparatus, the acceleration/deceleration range of the painting gun is detected by a predetermined detection means, and the amount of paint discharged from the painting gun is controlled based on the detection signal, thereby controlling the film thickness of the painted wall surface. The object of the present invention is to provide a method for controlling the amount of paint discharged from a paint gun in a painting device, which makes it as uniform as possible and allows safe painting work in high-rise buildings.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for controlling the amount of paint discharged from a coating apparatus according to the present invention will be described in detail below with reference to FIGS. 1 to 4.

In Fig. 1, reference numeral 1 denotes an aerial work vehicle, and a turntable 3 is rotatably provided on the aerial work vehicle 1 via a swivel ring 2. A telescopic boom 4 is attached along the longitudinal direction of the boom, which is extendable and retractable by a built-in telescopic cylinder.

At the tip of this telescopic boom 4, a workbench 5 (described in this embodiment as one equipped with a coating device), the structure of which is shown in detail in FIG. 2, is attached so that it can swing freely and is held in equilibrium. .

FIG. 2 is a diagram for explaining the specific structure of the workbench 5 attached to the tip of the telescopic boom 4, viewed from the front.

The workbench 5 is constructed using a horizontally long rectangular frame 5C as a skeleton in which guide rails 5a and 5b are arranged in parallel on the upper and lower sides,
A frame 6 is provided on the frame body 5C so as to straddle both the guide rails 5a and 5b so as to be able to reciprocate from side to side. That is, the frame 6 can run with a plurality of guide elements 6a guided by the guide rails 5a and 5b, and a vertically long fitting hole 6b is formed in the center of the frame 6. In this fitting hole 6b, a slider 6d having guide elements 6C arranged at the four corners is arranged to be vertically slidable.

Further, painting guns 7a and 7b (disposed on the left and right sides in this embodiment) are attached above the frame 6, and the movement of the painting guns 7a and 7b is carried out on one side (in the longitudinal direction) of the inside of the frame 5C. In this example, the drive sprocket (located on the left side))8
a and a driven sprocket 8b disposed on the other longitudinal side (right side in this embodiment), the frame 6 is moved as it reciprocates from side to side. .

In the figure, 9 is the balance weight of the chain 8C, 1
0.10 is a proximity sensor constituting a detection means for detecting the limits at both ends of the left and right reciprocating movement of the frame 6.

FIG. 3 shows a four-star painting gun 7a mounted on the workbench 5,
7b shows a control circuit for supplying paint to 7b.

In the figure, 11 is an air compressor, 12 is an electromagnetic air check valve (AND circuit), and 13 is the painting gun 7a.
, a flow control valve that controls the flow rate of paint supplied to 7b;
Reference numeral 14 indicates a paint supply path, and reference numeral 15 indicates an electromagnetic relay, which turns off the relay contact 15a when the contact 16a of the timer 16, which is activated by ON-OFF of the proximity sensor 10, is ON; The relay contact 15a is turned ON when the contact 16a is OFF. 17 is is.

Hereinafter, a method for controlling the amount of paint discharged from a coating gun in a coating apparatus according to the present invention will be explained in detail using the above-mentioned embodiments.

First, the aerial work vehicle 1 is moved to a target work site.

After completely fixing the turntable 3, the turntable 3 is rotated in a predetermined wall direction, the telescopic boom 4 is brought close to the target wall surface A to be painted (see Figure 4), and the telescopic boom 4 is extended and attached to the tip. The stand 5 is placed opposite the wall surface A to be painted.

Incidentally, the above-mentioned operations are accurately performed by a well-known control device equipped on the above-mentioned aerial work vehicle 1.

When the workbench 5 is set in front of a predetermined wall surface to be painted as described above, the painting gun 7a is activated.

Conditions for starting painting are given in step 7b. At this point, the positions of the painting guns 7a and 7b are such that the proximity sensor 10 on the left side of FIG. 2 detects the painting guns 7a and 7b.
The timer 16 connected in series with 0 is in an operating state, and the contact 16a is turned on. Therefore, the electromagnetic relay 15 connected in series with the contact 16a enters the operating state, and the relay contact 15a turns OFF, so that the electromagnetic air check valve 12
Let be closed. Therefore, both the painting guns 7a,
The discharge of paint from 7b is in a stopped state. In this state, both the painting guns 7a and 7b are at the painting starting position toward the right side.

The electromagnetic relay 15 shown in Fig. 3, which satisfies the above conditions.
The set time has elapsed (this set time is satisfied by the setting conditions of the timer 16, which is set in consideration of the timing when the painting guns 7a and 7b approach the left and right ends and are accelerated or decelerated), and the By turning off the contact 16a of the timer 16, the relay contact 15a
is turned on and the electromagnetic air check valve 12 is opened. Therefore, the flow rate control valve 13 opens and both painting guns 7
Predetermined paint is discharged from a and 7b.

Due to the above movement to the right, both the painting guns 7a and 7b
When the object approaches the right proximity sensor 10, the proximity sensor 10 detects this, activates the electromagnetic relay 15 again, and shuts off the electromagnetic air check valve 12. Therefore, the flow rate control valve 13 is also closed again to stop discharging the paint.

The paint gun above? By repeating the reciprocating movements of a and 7b, a plurality of painting steps are completed, for example, as indicated by the arrow B in FIG. 4, and the complete painting work of the entire target wall surface A to be painted is completed.

That is, according to the above embodiment, the paint discharge from both painting guns 7a, 7b is completely stopped in the traveling range where the traveling speed accelerates or decelerates at both ends of the reciprocating movement of both painting guns 7a, 7b. Therefore, unnecessary coating of paint as seen in conventional automatic painting equipment is not observed, and therefore, formation of an uneven coating film is eliminated and a uniform coating film can be formed. Furthermore, since the painting area becomes clear, numerical control of a predetermined painting pattern, etc. becomes very simple, and work efficiency is significantly improved.

〔Effect of the invention〕

As described above, according to the present invention, the coating gun is mounted on a movable workbench, etc., and is configured to perform predetermined painting while moving the paint gun at a predetermined speed along the wall surface of a building, etc. In the device, the acceleration/deceleration range of the painting gun is detected by a predetermined detection means, and the amount of paint discharged from the painting gun is controlled based on the detection signal, thereby minimizing the film thickness of the painted wall surface. It is possible to provide a method for controlling the amount of paint discharged from a paint gun in a painting device, which enables uniformity and safe painting work in high-rise buildings.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of an aerial work vehicle that employs the method for controlling the amount of paint discharged from a coating device according to the present invention, and Fig. 2 shows the reciprocating motion of a painting gun that employs the method for controlling the amount of paint discharged from the same painting device. A front view showing the mechanism, Fig. 3 is a control circuit diagram for intermittently discharging paint from the coating gun of the above coating device, and Fig. 4 shows painting by a coating gun that adopts the method of controlling the amount of paint discharged from the above coating device. It is an explanatory diagram showing a range. l...Aerial work vehicle, 2...Swivel ring, 3...Turntable, 4...Telescopic boom, 5...Work platform (
In this example, it is assumed that a coating device is installed), 5
a, 5b...Guide rail, 5C...Frame, 6...
・Frame, 6a... Guide element, 6b... Fitting hole,
6c...Guide element, 6d...Slider element, 7a, 7b.
...Painting gun (placed on the left and right in this example), 8a...
Drive sprocket, 8b...driven sprocket, 8c
...Chain, 9...Balance weight, 10...
・Proximity sensor (detection means), 11... Air compressor, 12... Electromagnetic air check valve (AND circuit), 13... Flow rate control valve, 14... Paint supply path,
15... Electromagnetic relay, 15a... Relay contact, 16
...Timer, 16a... Contact, 17... Power supply. Patent applicant: Aichi Sharyo Co., Ltd. Figure 3 Figure 4

Claims (1)

[Claims] In a painting device that is mounted on a movable workbench or the like and that performs a prescribed painting while moving a painting gun at a prescribed speed along a wall surface of a building, etc., acceleration/deceleration of the painting gun is controlled. The paint coating is characterized in that the area is detected by a predetermined detection means, and the amount of paint discharged from the paint gun is controlled based on the detection signal, thereby making the film thickness of the painted wall surface as uniform as possible. A method for controlling the amount of paint discharged from a paint gun in a device.