JPH0330852A - Coating gun - Google Patents

Abstract

PURPOSE:To make a troublesome work of washing a main body of coating gun unnecessary by making three parts, a coating material vessel, a spray nozzle and a liquid path communicating with them, into one combination body and by attaching it removably to a nozzle part of the gun. CONSTITUTION:A combination body, which is made of three parts, a coating material vessel 12, a spray nozzle and a liquid path communicating with them, into one body, is attached to a nozzle part 1 of a coating gun. After the coating is finished, the combination body is immediately taken away and burnt off. The inside of the spray gun is not contaminated by a coating liquid, therefore, washing work after use is made completely unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a paint gun that is held and used when painting cars, buildings, etc.

(Prior art) A coating liquid container is connected directly to a spray nozzle, and compressed air is guided around the spray nozzle, and the energy of the compressed air is used to spray the coating liquid in the coating liquid container from the nozzle. Painting guns are known.

(Intelligence R to be Solved by the Invention) After using the above-mentioned painting gun, it is necessary to wash the remaining coating liquid in the coating liquid container and nozzle with thinner, etc., but this cleaning is time-consuming. In addition, hands and the like become contaminated with the paint solution, and the consumption of thinner used every time cleaning cannot be ignored economically.

SUMMARY OF THE INVENTION An object of the present invention is to provide a coating gun that can solve the above problems.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention forms a combination product in which a coating liquid container, a spray nozzle, and a liquid passage pipe that communicates these are integrated, and this is attached to the nozzle portion. The coating liquid flow path can be interrupted by pressing a part of the liquid passage pipe with the tip of a push rod that protrudes in and out when the trigger is operated, or by releasing the pressure. The above-mentioned combination product is attached to the nozzle part of the painting gun when starting painting, and when painting is finished, it is immediately removed and disposed of by incineration. It is possible.

Therefore, the interior of the coating gun is not contaminated with coating liquid, and there is no need for cleaning after use.

(Example) Hereinafter, specific examples of the coating gun according to the present invention will be described in detail with reference to the drawings.

Fig. 1 is an overall perspective view showing the state in which the lid of the nozzle part is opened, Fig. 2 is a partial perspective view showing the state in use with the lid of the nozzle part closed, and Fig. 3 shows a part of the holding container. FIG. 4 is a partial perspective view showing the container in a partially closed state; FIG. 5 is a diagram showing an integrated assembly including a coating liquid container; FIG. The figure is an explanatory cross-sectional view of the spray nozzle.

The main body of the coating gun is formed by a nozzle part 1 and a grip part 2.

At this time, the nozzle part 1 is provided with a circular hole 4 at the center of the tip side for accommodating the spray nozzle 3 shown in FIG. 5 is screwed onto the guide hole 6, which communicates with the back of the circular hole 4 to form a guide hole 6 for guiding the liquid passage pipe of the combination product described below outward, and is located behind the circular hole 4. By providing a cover 8 that can be swung around a support shaft 7 whose fixed portion is fixed to the main body, the guide hole 6 can be opened along the longitudinal direction. For example, a locking pin 9 is provided on the negative side, and a locking pin 9 is provided on the other side so that the spray nozzle 3 can be inserted from the side and the lid body 8 is securely locked in the closed position shown in FIG. In addition to providing a locking hole 10 for holding the lid, a knob 11 for opening and closing is provided at an appropriate position on the lid body 8, and a knob 11 for opening and closing is provided at an appropriate position on the nozzle portion 1 as shown in FIG. A holding container 13 for accommodating the coating liquid container 12 shown in FIG. At the same time, a through hole 16 is provided at a certain part of the container 13 for inserting a liquid passage pipe 15 that communicates the coating liquid container 12 and the spray nozzle 3, and one part of the nozzle part is provided with a through hole 16 as described later. Appropriate passage means (not shown) are formed for supplying compressed air from the compressed air intake to the outer periphery of the spray nozzle 3, and on the other hand, an operating valve for controlling the opening/closing of the air is provided in the middle of these passage means. A knob 17 is provided, but by rotating the knob 17, the flow rate of compressed air can be adjusted.

Thus, the grip part 2 has a trigger 19 which is swingably supported via a support shaft 18 provided at the upper part of the grip part 2 and is disposed relatively above and in front of the core part 2. is always pushed out in the direction of the arrow f1 by a spring (not shown).

On the other hand, 20 is a valve rod attached to the inner surface of the trigger, and when the trigger 19 is pushed out in the direction of arrow f1, it exhibits a valve action that closes an air introduction hole that flows in from a compressed air intake port, which will be described later. Conversely, when the trigger 19 is pulled, the introduction hole is opened.

On the other hand, 21 is a push rod provided to protrude a certain length from the back side to the front side of the trigger 19, and when the trigger 19 is displaced in the f1 direction, its tip 21a is inserted into the liquid passage pipe 15. The guide hole 6 is press-blocked, thereby forming a liquid passage blocking mechanism that closes the liquid passage pipe 15. In this case, the push rod 21 is screwed together with the trigger 19, so that the rear knob 2
By appropriately rotating 1b, the protruding length of its tip 21a can be changed as appropriate.

Reference numeral 23 denotes a locking handle supported at a position below the trigger 19 via a shaft 22 so as to be able to swing freely, and the locking handle 23 is always urged in the direction of arrow f2 by a spring (not shown). 2, and the lower end of the trigger 19, which is pulled in the opposite direction to the arrow f1 direction, can be locked by the locking pawl 23a formed on the upper part of the handle 23, as shown in FIG. In addition, a compressed air intake port 24 is provided for taking in compressed air supplied to the spray nozzle 3 from the outside.

In the present invention, the coating liquid container 12, the spray nozzle 3, and the liquid passage pipe 15 that communicates them are formed into an integrated assembly as shown in FIG. 5, and this can be easily attached to the coating gun body. Make it removable. This will be explained below.

The coating liquid container 12 is formed into a funnel-shaped bag made of, for example, a synthetic resin, and the liquid passage pipe 15 attached to the bottom thereof is made of, for example, a synthetic resin that is easily deformed by elasticity, and a spray nozzle 3 is installed at the tip thereof. Installed. Spray nozzle 3 here
As shown in FIG. 6, it has a double tube structure consisting of an inner tube 25 and an outer tube 26, and a through hole 27 is provided at the tip of the outer tube 26 to introduce compressed air from the outside as indicated by the arrow f3. The coating liquid is sprayed by being force-fed in the direction. Note that 28 is an O-ring interposed between the inner tube 25 and the outer tube 27, and the distal end of the liquid passage tube 15 is inserted into the base side of the inner tube 25 and connected thereto. In the above configuration, the aperture r of the spray nozzle 3 is appropriately selected depending on whether it is for rough finishing, semi-finishing or finishing.

Next, the present invention will be explained in detail. The operator connects the compressed air supply hose to the compressed air intake port 24, and at the same time opens the part 13a of the holding container 13 as shown in FIG. At the same time as housing the container 12, the liquid passage pipe 15 is inserted into the through hole 16, and at the same time, the lid body 8 is opened by swinging around the support shaft 7 as shown in FIG. The spray nozzle 3 is inserted into the circular hole 4 by the trigger 1.
9 (thereby displacing the push rod 21 in the direction opposite to the direction of the arrow f1 and fitting the liquid passage pipe 15 into the guide hole 6. At this time, with the trigger 19 pulled, Upper end locking claw 23 of the lower end of the locking lever 23
The above operation can be easily performed by engaging and superimposing the part a. When the installation of the above-mentioned combination is completed, the coating liquid is filled into the coating liquid container 12 and the operation knob 1 is turned.
7 is rotated appropriately to supply an appropriate amount of compressed air to the spray nozzle 3 while pulling the trigger 19, which also pulls the valve stem 20 and opens the valve of the compressed air introduction hole. , a spray nozzle 3 attached to the nozzle part 1
An appropriate amount of compressed air is discharged from the tip of the tube, creating a vacuum state in that area and sucking the coating liquid.

By the way, when the trigger 19 is not pulled, the push rod 21 of the passage blocking mechanism presses the liquid passage pipe 15 in a flat shape to shut it off, so the coating liquid is not sprayed. However, when the push rod 21 is moved in conjunction with the pulling operation of the trigger 19 and the blocking state of the liquid passage pipe 15 is released, the coating liquid in the coating liquid container 12 is sucked and released from the spray nozzle 3. It will be sprayed in the form of a mist. In order to stop the spraying of the coating liquid, the pulled trigger 19 is released, and as a result, the push rod 21 immediately flattens the liquid passage pipe 15 and puts it in a blocked state, so that the spraying of the coating liquid is stopped. Stop.

When the painting work is completed, the part 13a of the holding container 13 and the lid 8 are opened to remove the integral assembly such as the coating liquid container 12 and the spray nozzle 3 from the gun body, and the whole is incinerated as a disposable item. However, the spray nozzle 3 alone may be removed from the tube end and reused.

Note that FIG. 3 shows another example, and in the above embodiment, the coating liquid container is positioned upward, but in this embodiment, it is positioned downward, and 12゛ is the container. 13"
A synthetic resin bag 159 is filled with the coating liquid inside the bag, and 159 is a liquid passage pipe made of synthetic resin that is inserted into the coating liquid inside the bag.

(Effects of the Invention) According to the present invention, all parts that come into direct contact with the coating liquid, that is, the coating liquid container, the spray nozzle, and the liquid passage pipe that communicates these, are all integrated into an integrated product, and after use, the parts can be removed immediately. Painting power 1 because it can be simply removed
This eliminates the need for any troublesome cleaning work on the main body of the cleaner, and also eliminates all the troubles caused by using thinner for cleaning.

[Brief explanation of drawings]

Fig. 1 is an overall perspective view showing the state in which the lid of the nozzle part is opened, Fig. 2 is a partial perspective view showing the state in use with the lid of the nozzle part closed, and Fig. 3 shows a part of the holding container. FIG. 4 is a partial perspective view showing the container in a partially closed state; FIG. 5 is a diagram showing an integrated product including a coating liquid container; The figure is an explanatory cross-sectional view of the spray nozzle, and FIG. 7 is another example. 2...Grip portion, 3...Spray nozzle, 12...Coating liquid container, 15...Liquid passage pipe. 2: Grip part 3: l'n'r'm nozzle [2: Light liquid container 15: Liquid passage pipe 3rd same% 5th flash (, -0)

Claims (1)

[Claims] (1) The coating liquid container, the spray nozzle, and the liquid passage pipe that communicates these are made into an integrated product, and this is attached to the nozzle part in a state where it can be freely attached and detached, and the liquid passage pipe A painting gun characterized in that a part of the paint gun is pressed by the tip of a push rod that protrudes in and out in conjunction with trigger operation, and the paint fluid flow path is interrupted when the pressure is released. .