JPH0440757Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a latching device for a hand-held paint sprayer that latches a spray gun or the like used in the painting room of a hand-sprayed painting booth.

[Prior art and its problems]

<Problem 1> In the painting room of the hand-spraying booth where workers spray paint using a hand-held paint machine such as a spray gun, there is a paint machine holder that hangs the paint machine when it is not in use. A tool (hereinafter referred to as a gun holder) is installed.

However, when an electrostatic spray gun to which a high voltage is applied is used as a hand-held paint sprayer, there is a risk that the operator may touch the spray gun that is latched to the gun holder and receive an electric shock.

<Problem 2> In addition, in conventional hand-spraying booths, a large amount of air is exhausted from the painting room even when the worker is not spraying, just as when painting, so the exhaust fan's power is not enough. There was the problem of rising costs.

<Problem 3> Additionally, in the automobile painting process, one worker takes turns spraying anti-rust paint on the instrument panel area at the top of the front of the car body and the blackout area at the bottom of the front of the car body, which has been given a top coat. A hand-sprayed painting booth is provided.

In order to manage the health of workers performing hand-spray painting in this painting room, the present applicant has provided an upper suction duct and a lower suction duct, respectively, above and below the automobile body that is stopped in the painting room. From the upper suction duct at all times, for example, at a wind speed of 0.5 m/sec, approximately 120 m/min ³
At the same time, the air from the lower suction duct is also forcibly exhausted at the same speed as the upper suction duct at a wind speed of 0.3 m/sec.
^120m3 of air is forcibly exhausted, and the paint mist sprayed from the instrument panel spray gun and turned into overspray is discharged from the upper suction duct, and the paint mist sprayed from the blackout spray gun and turned into overspray is discharged from the upper suction duct. The exhaust inside the paint chamber is controlled so that the aged paint mist is discharged from the lower suction duct.

However, in this case, some of the paint particles sprayed onto the blackout area at the lower front of the car body are blown up by the suction force of the upper suction duct and adhere to the surface of the bonnet area, which has been coated with topcoat. This often resulted in the problem of color cast.

Therefore, the inventor of the present invention automatically stops the exhaust from the upper suction duct when painting the blackout area, and exhausts the air only from the lower suction duct. We devised a method to prevent color cast.

However, in order to reliably prevent this color cast, it is necessary for workers who alternately paint the instrument panel and blackout areas to use a spray gun for the blackout areas without having to perform any troublesome operations. It is desirable that the damper installed in the duct be fully closed automatically.

[Purpose of invention]

Therefore, this invention was devised to solve the above-mentioned problems all at once.When an operator paints using a hand-held atomizer such as an electrostatic spray gun, the atomizer must be equipped with a gun holder. Focusing on the fact that the hand-held atomizer is attached to and removed from the gun holder when painting is paused, a switch signal is output and applied to the atomizer when the hand-held atomizer is connected to and removed from the gun holder. A hand-held paint sprayer holder that can turn on and off the high voltage applied to the painting chamber, variable control of the rotation speed of the exhaust fan that exhausts the air in the painting room, and control the opening and closing of the damper installed in the exhaust duct. The purpose is to provide equipment.

[Structure of the idea]

In order to achieve this purpose, the hand-held paint sprayer latching device according to the present invention is a paint sprayer latching device (gun latching device) that is movable when the hand-held paint sprayer is hooked or unloaded.
and a switch that is opened and closed in conjunction with the operation of the hook.

[Effect of invention]

According to the present invention, if this is applied to a hand-sprayed painting booth where the instrument panel and blackout area of an automobile body that has been finished being coated is painted using a hand-held spray gun, the blackout area at the lower front of the automobile body can be painted. When painting, when you hook the spray gun for the instrument panel that you have been using up to that point on the gun holder, or when you hang the spray gun for the blackout area used for painting the blackout area from the gun holder. When it is removed, the gun holder moves, and the switch that opens and closes in conjunction with the gun holder outputs an operation signal to close the damper installed in the upper suction duct installed above the car body. Exhaust from the suction duct can be automatically stopped and exhaust can be exhausted only from the lower suction duct provided below the automobile body. Therefore, when a worker paints a blackout area, the suction from the upper suction duct must be stopped without any troublesome operations, and the spray is sprayed onto the blackout area, causing overspray. It is possible to reliably prevent the stale paint mist from flying up and prevent color cast on the bonnet part.

Further, according to the present invention, when the electrostatic spray gun is removed from the gun holder, a high voltage is applied to the spray gun, and when the gun is latched onto the gun holder, the high voltage is turned off. It is possible to prevent an operator from receiving an electric shock even if a worker accidentally touches the spray gun when the spray gun is not in use.

Furthermore, according to the present invention, the exhaust volume in the painting chamber is increased only when the operator removes the spray gun from the gun holder and starts painting, and when the spray gun is not latched to the gun holder and the painting is stopped. It is possible to maintain the exhaust volume in a reduced state and save power costs for the exhaust fan.

〔Example〕

Hereinafter, embodiments of the present invention will be specifically described based on the drawings.

FIG. 1 is a front view showing an example of a latching device for a hand-held paint sprayer according to the present invention, and FIG. 2 is a side view showing an example of a hand-spraying booth using the latching device.

In Fig. 2, 1 is an instrument panel part 2a located at the upper front of the automobile body which has been given a top coat.
3 is an upper suction duct disposed above the automobile body 2 carried into the painting room 1;
is a lower suction duct arranged below the automobile body 2.

The upper suction duct 3 has its suction port 5 connected to an automobile body 2 that is stopped at a predetermined painting position in the painting room 1.
An air volume adjusting damper 7 is interposed so as to be spaced apart from and opposite to the instrument panel portion 2a of the vehicle, and to be opened and closed by an air cylinder 6.

Further, the lower suction duct 4 is provided with suction ports 8 that face each other from the left and right sides of the automobile body 2, and
An air volume adjusting damper 10 that is opened and closed by an air cylinder 9 is interposed.

The upper suction duct 3 and the lower suction duct 4 are connected to an exhaust treatment chamber 11 installed outside the painting room 1.

This exhaust treatment chamber 11 is configured so that the air within the coating chamber 1, which has been sucked in and exhausted from the upper suction duct 3 and the lower suction duct 4 by the exhaust fan 12, passes through a net filter 14 to which water droplets sprayed from a shower pipe 13 are attached, and the paint mist contained in the air is separated and removed by gas-liquid contact, cleaned, and then exhausted to the outside through an eliminator 15.

Also, in the painting room 1, there is an instrument panel spray gun 16 for spraying, for example, brown anti-rust paint on the instrument panel 2a, and a black-out spray gun 17 for spraying black anti-rust paint on the black-out part 2b. and each individual gun latching tool 18
and 19.

Of these, the gun holder 18 for hanging the spray gun 16 is, for example, as shown in FIG. Hanging fittings 22 for hanging the spray guns 16 on the left and right ends of the rod 21, respectively.
A balance weight 23 is provided.

Further, stoppers 24 and 25 are provided on the right and left sides of the rotation shaft 20 to restrict the rotation angle of the lever 21 that attempts to rotate around the rotation shaft 20,
Both ends of the lever 21 are configured to swing up and down by a certain angle.

In addition, the end of the lever 21 on the balance weight 23 side is
It is engaged with the operator 28 of the limit switch 27 that switches and controls the mechanical valve 26 that supplies compressed air to operate the air cylinders 6 and 9, and when the end thereof swings up and down, the operator 28 interlocks and operates the limit switch. 27 is configured to be opened and closed.

That is, the gun latching device 18 that is movable when the spray gun 16 is hooked or unhooked, and the limit switch 27 that is opened and closed in conjunction with the latching device 18 constitute the latching device S according to the present invention.

For example, the hook 22 of the gun hook 18
Remove the spray gun 16 from the
The limit switch 27, whose operator 28 is engaged with the end of the lever 21 while in contact with the stopper 24 as shown by the solid line, is connected to the air volume adjusting damper 7.
An operation signal is output to supply compressed air from the mechanical valve 26 to operate the air cylinders 6 and 9 so that the air cylinders 6 and 10 are opened at the required opening degrees.

Also, the spray gun 16 is hooked to the hook 22 of the gun hook 18, and the lever 21 swings as shown by the chain line in the figure, and the operator 28 of the limit switch 27 is moved by the end of the lever 21. When pushed upward, the limit switch 27 moves the damper 7 into the air cylinder 6 against the mechanical valve 26.
At the same time, an operation signal is outputted to supply compressed air to fully open the damper 10 to the air cylinder 9.

The above is an example of the hanging device S for a hand-held sprayer according to the present invention and a manual spray booth using the same. Next, its operation will be described.

Normally, the spray gun 16 for the instrument panel section and the spray gun 17 for the blackout section are hung on the gun hooks 18 and 19, respectively.
At this time, the lever 21 of the gun hook 18 is in the state shown by the chain line in FIG. damper 10 is fully opened,
The air is exhausted only from the lower suction duct 4.

As shown in FIG. 2, when the automobile body 2 is carried into the painting room 1 and stopped at a predetermined painting position, a worker in the painting room 1 uses the spray guns 16 and 17 alternately to paint the instrument panel. Paint the portion 2a and the blackout portion 2b.

At this time, when the operator first removes the instrument panel spray gun 16 from the gun holder 18 in order to paint the instrument panel part 2a of the automobile body 2,
The lever 21 of the gun holder 18 is in the state shown by the solid line in FIG. 1, and compressed air is supplied from the mechanical valve 26 to the cylinders 6 and 9 so as to open the dampers 7 and 10 to the required opening degrees, respectively. has been done.

The opening degree of each damper 7 and 10 is controlled so that, for example, air is exhausted through the upper suction duct 3 and the lower suction duct 4 at a rate of 120 m ³ per minute at wind speeds of 0.5 m/sec and 0.3 m/sec, respectively.

Therefore, when an operator holds the spray gun 16 and sprays the instrument panel 2a by hand, the paint mist oversprayed from the spray gun 16 is sucked into the upper suction duct 3 and flows into the exhaust treatment chamber 11. The gas is sent to the exhaust treatment chamber 11 and separated and removed by gas-liquid contact.

Then, when the painting of the instrument panel part 2a is completed and the worker hooks the spray gun 16 to the gun hook 18, the lever 21 of the gun hook 18 is moved to the first position.
The limit switch 2 swings from the state shown by the solid line in the figure as shown by the chain line in the same figure, and in conjunction with the lever 21, the limit switch 2
7 is pushed upward, the limit switch 27 is switched, and at the same time, the mechanical valve 26 supplies air to the air cylinder 6 to fully close the damper 7.
Compressed air is supplied to the air cylinder 9 to fully open the damper 10 .

Next, the spray gun 17 for the blackout portion is removed from the gun holder 19, and the blackout portion 2b of the automobile body 2 is painted with the spray gun 17.

At this time, the damper 7 installed in the upper suction duct 3 is closed, and the exhaust is exhausted only from the lower suction duct 4, and the displacement of the lower suction duct is reduced to 240 m ³ / without increasing the capacity of the exhaust fan 12. min
As a result, some of the paint particles sprayed against the blackout portion 2b are reliably prevented from flying upward and depositing on the bonnet portion 2c.

In addition, in the above embodiment, the limit switch 27
The explanation has been made regarding the case where the mechanical valve 26 that supplies compressed air to the air cylinders 6 and 9 is controlled by the operation signal output from the limit switch 27 to control the opening and closing of the dampers 7 and 10. The opening and closing of the dampers 7 and 10 may be controlled by a module troll motor or the like that is controlled by an electric signal.

In addition, in the embodiment, the dampers 7 and 10 interposed in the upper suction duct 3 and the lower suction duct 4, which serve as exhaust ducts, are activated by an operation signal from a switch 27 that is opened and closed in conjunction with the gun latching tool 18. Although a case has been described in which the exhaust state in the painting chamber 1 is varied by opening and closing, the hanging device S according to the present invention is not limited to this.
For example, the rotation speed of an exhaust fan that exhausts air from the painting chamber can be variably controlled by an operation signal from a switch 27 that is opened and closed in conjunction with the gun holder 18. That is, when the paint sprayer is hung on the gun holder 18 in a normal hand-spraying booth and the painting is stopped, the switch 27 outputs an operation signal that maintains the rotational speed of the exhaust fan in a lowered state, and the paint sprayer is suspended from the gun. When the exhaust fan is removed from the hook 18 and painted, the switch 27 is turned to increase the rotational speed of the exhaust fan to a required value, thereby reducing the power cost of the exhaust fan.

Further, when the electrostatic spray gun is hung on the gun holder 18, the high voltage applied to the spray gun is automatically cut off, thereby reliably preventing the risk of electric shock to the worker. can.

[Effect of idea]

As mentioned above, the latching device according to the present invention is
For example, if you install this in a hand-spraying booth where the instrument panel and blackout areas of a car body that have been finished with topcoat are painted using a hand-held spray gun, you can use a spray gun to paint the blackout areas at the bottom of the front of the car body. When a spray gun for the outside section is removed from its gun holder, the gun holder moves, and a switch that opens and closes in conjunction with this moves and connects the upper suction duct installed above the car body. An operation signal is output to close the installed air volume adjustment damper, and the exhaust from the upper suction duct is automatically stopped, ensuring that the exhaust is exhausted only from the lower suction duct provided below the car body. It has the effect of being able to vary the condition, and when the operator is painting the blackout area, the paint mist that has been sprayed on the blackout area will not fly up and become an overspray, and the bonnet area can be painted. It has an excellent effect of preventing color cast.

In addition, when the hanging device according to the present invention is applied to a normal hand-spraying painting booth, when a hand-held paint sprayer is hung on the hanging device, the rotation speed of the exhaust fan is reduced by the switch linked to the hanging device. When the paint sprayer is removed from the holder and painted, the switch is switched, and the switch outputs an operation signal to increase the rotational speed of the exhaust fan to a predetermined value. This has the excellent effect of reducing power costs.

Furthermore, when a hand-held electrostatic sprayer is latched onto its holder, the high voltage applied to the electrostatic sprayer is automatically turned off by an operation signal from a switch, making it easier for workers to operate. It also has the effect of reliably preventing the risk of receiving an electric shock from touching an electrostatic sprayer when it is not in use.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of a latching device according to the present invention, and FIG. 2 is a side view showing an example of a hand-blown painting booth in which the same is installed. Explanation of symbols, S... Latching device, 16... Spray gun (hand-held paint machine), 18... Gun hanging tool (painting machine hanging tool), 21... Lever, 22... Hanging metal fitting, 23 ... Balance weight, 27 ... Limit switch, 28 ... Operator.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The product is characterized by consisting of a paint sprayer holder that is movable when the hand-held paint sprayer is hooked or unloaded, and a switch that opens and closes in conjunction with the operation of the hanger. A latching device for hand-held paint sprayers. (2) the hanging device is formed of a lever having a hooking fitting for hanging the coating machine at one end and a balance weight attached to the other end so that both ends can swing up and down by a predetermined angle; The latching device for a hand-held paint sprayer according to claim 1, wherein an operator of the switch is engaged with the lever.