JPS6384662A - Spray gun - Google Patents

Abstract

PURPOSE:To enable continuous spraying on a building material to be coated by fixing an air discharger provided with a housing having a main part forming a conductor hole larger than the inner hole diameter of a mounting part and an air pipe freely attachably and detachably to an airless gun. CONSTITUTION:In the housing 13, the main part 7 is connected to the airless gun 3 capable of discharging a coating material supplied under high pressure from a tip opening 2 through the mounting part 5 and a connecting part 6, the mounting part 6 is communicated to the main part 7, the conductor hole 9 wherein the inner hole diameter d1 of the main part 7 is made larger than the inner hole diameter D2 of the mounting part 6 is formed, and a coating material nozzle 12 having an inner hole 11 communicating with the conductor hole 9 is fixed. An air nozzle 15 coaxial with the inner hole 11 of the coating nozzle is provided at the tip, a high-pressure air source C is connected to the rear end part 16, and the air discharger 20 having the air pipe 19 capable of protruding the rear end part 16 from the rear wall 17 and capable of being freely reciprocated and fixed and the housing 13 is fixed to the rear wall 17 of the main part 7, the inner hole of the mounting part 5 is communicated to the tip opening 2, and the air discharger is fixed freely attachably and detachably to the airless gun.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention makes it possible to spray architectural coating materials, etc. by detachably attaching an air discharge tool to an airless gun, and also enables spraying of construction materials, etc. as well as a conventional airless gun. The present invention relates to a spray gun which can be used for various purposes and whose versatility can be improved.

[Background technology]

The spraying of architectural coatings, such as tiles and crater-like pattern paints, on objects to be coated has traditionally involved a thick, patterned under-spraying process, and a finishing coat in which the under-sprayed surface is coated, etc. It is being done.

In addition, when performing this type of underspray painting, conventionally, a cylindrical spray is applied continuously using a snake-type pump, a squeeze-type pump, etc., or a regular construction gun is used. It was being applied. Furthermore, as a finishing coating, a finishing coating material such as a coating material that is pumped under high pressure is sprayed using an airless gun.

However, although it is possible to paint continuously using a snake-type pump, there is a problem in that the equipment itself becomes large and increases equipment cost. Because of this, the paint material stored in the paint cup increases its weight, which impairs handling and causes fatigue for workers, and it is necessary to interrupt the painting operation when refilling the paint cup with paint material. There was a problem that the work efficiency was also reduced. In addition, in both cases, two types of equipment are required for finishing painting, namely equipment using an airless gun.
This has caused many problems, such as increasing the size of the device and further increasing the cost of the device.

[Purpose of the invention]

The present invention focuses on an airless gun that can efficiently and continuously spray thick coats and can be suitably used for large objects to be coated, and the basic idea is that an air discharge tool is detachably attached to the airless gun. This makes it possible to spray architectural coating materials, etc., and also reduces the size and cost of the equipment and improves work efficiency.In addition, by attaching a spray nozzle instead of an air discharge device, it is possible to use an airless gun. The purpose of the present invention is to provide a spray gun that can be used even when closed and has improved versatility.

[Disclosure of the invention]

An embodiment of the present invention will be described below based on the drawings.

In the figure, a spray gun 1 is connected to an airless gun 3 capable of discharging coating material from a tip opening 2, and a main portion 7 formed at a mounting portion 5 via a joint portion 6 is attached to the airless gun 3, which is capable of discharging coating material from a tip opening 2. Housing 1 with a coating nozzle 12 having a hole 11 attached thereto
3 and an air pipe 19 having an air nozzle 15 at its tip that is concentric with the inner hole 11 and connected to a high-pressure air source C at its rear end 16, is detachably attached.

In this example, the airless gun 3 is a conventional airless gun that is usually commercially available, and has a pistol shape with an Ifi part 2, a lower part 1, and a lower hand part 22, and a handle part 22 on the front part of the body part 21.
A trigger 23 hanging down in front is pivotally mounted. In addition, the airless gun 3 connects the grip portion 2 from the coating material nipple 25 at the lower end of the handle portion 22.
A coating material flow path is formed that extends along 2 and communicates with the tip opening 2 of the body 21 . In addition, a well-known on-off valve that can open and close the coating material flow path by operating the trigger 23 is disposed in the cough coating material flow path, and the coating material using a pail can or the like communicates with the coating material nipple 25. It is possible to manually turn off the feeding of the coating material that is pumped from the pressure feeding device fP. Further, the airless gun 3 has a screw threaded on the outer periphery of the tip 26 of the barb 21 for attaching the air discharge tool 20.

The air discharge tool 20 includes a housing 13 and the housing 1.
3 and an air pipe 19 attached to the air pipe 19.

In this example, the housing 13 includes a mounting portion 5 having approximately the same diameter as the tip 26 of the airless gun 3, a joint portion 6 rising from the mounting portion 5, and a joint portion 6 extending approximately parallel to the mounting portion 5 at the upper edge of the joint portion 6. It has a substantially S-shaped base body 29 that is integrally formed with the portion 7 . Further, a screw hole 31 is formed in the mounting portion 5 to correspond to the tip opening 2, and the inner hole diameter D1 of the guide hole 9 that opens at the tip #l110 of the main portion 7 is compared with the inner hole diameter D2 of the screw hole 31. The guide hole 9 and the screw hole 31 are formed to have a large diameter.
Communication is provided by an upright hole 30 passing through the joint portion 6.

Further, a coating material nozzle 12 having a tapered cone-shaped inner hole 11 is disposed at the tip 10 of the main portion 7, and the 1:1i material nozzle 12 is clamped by a cap nut 32 which is attached to the tip 10.

Therefore, the housing 13 has an inner hole 11 of the coating material nozzle 12.
, the guide hole 9, the upright hole 30, and the screw hole 31 form a coating material flow path 27 that opens at the tip of the coating material nozzle 12 and the mounting portion 51&end.

Further, an air pipe 19 whose rear end communicates with a high-pressure air source C is inserted into the housing 13 via a fixing fitting 35 attached to the rear wall 17 of the main portion 7.

The air pipe 19 has an air hole 36 at its rear end that communicates with the high pressure air source C.
An air nozzle 15 having a tapered outer circumferential surface portion 15A is screwed concentrically with the base tube portion 37 at the tip thereof.

In this example, the fixing fitting 35 includes a cylindrical fixing fitting piece 40 with a pot that is screwed into a screw hole 39 provided in the rear wall 17;
It is provided with a reciprocating metal piece 41 attached to a screw portion 40A protruding from the peripheral surface of the rear end of the flange portion.

The fixing metal piece 40 has a center hole 42 that is concentric with the inner hole 11 of the painting nozzle 12, and can slide on the base pipe portion 37 of the air pipe 19 using a sealing material or the like provided around the center hole 42. The shaft can be sealed and maintained.

Further, the screw portion 40A is connected to the rear portion of the base tube portion 37 with a pin,
A reciprocating metal piece 41 such as a bag nut I, which is locked by means such as a ring connection, is attached, and a fixing metal piece 4 of the retractable metal piece 41 is attached.
0, the air pipe 19 can be attached so as to be movable and fixed. Note that the air discharge tool 20 has the air nozzle 1 in a center hole 42 that is concentric with the inner hole 11 of the coating material nozzle 12.
By inserting the base tube part 37 which has concentrically attached 5.
The inner hole 11 and the air nozzle 15 can be arranged concentrically.

The air pipe 19 can change the cross-sectional area of the gap between the inner hole 11 and the air nozzle 15 as it advances and retreats, and furthermore, the air pipe 19 can change the cross-sectional area of the gap between the inner hole 11 and the air nozzle 15 as it advances and retreats. The spraying pattern of the coating material sprayed from the nozzle 12 can be changed in various ways. Note that an air nipple 50 is provided at the rear end portion 16 of the air pipe 19 protruding from the rear wall 17.
A high-pressure air source C is connected via an elbow fitting 51, a metering cock 52, and the like.

The airless gun: (and the air discharge tool 20 are connected to each other by a joint fitting 55 so that film can be deposited freely.The joint fitting 55 is
In this example, a cylindrical joint piece 57 is screwed into the screw hole 31 of the mounting part 5 and has a locking collar part 56 at the rear end thereof.
and a cap nut-shaped joint nut piece 60 that is provided with a collar portion 59 that engages with the locking collar portion 56 and is screwed onto the tip portion 26 of the airless gun 3. Therefore, the locking collar portion 56 is connected to the engaging collar portion. 59, the airless gun 3 can be freely attached while being electrically connected between the tip opening 2 of the airless gun 3 and the inner hole of the mounting portion 5, that is, the screw hole 31, through the center hole 57A of the connecting tube piece 57.

[Effect]

Thus, the spray gun 1 discharges a relatively highly viscous tile or crater-shaped pattern coating material from the tip opening 2, which is fed under high pressure by the coating material pressure feeding device P. In addition, since the inner hole diameter D1 of the guide hole 9 is formed to be larger than the inner hole diameter D2 of the attachment part 5, the discharged coating material is depressurized in the coating material flow path 27 including the guide hole 9. The coating material is fed to the tip of the coating material nozzle 12.

Further, the supplied coating material can be blown out in a substantially atomized form by air discharged from an air nozzle provided concentrically with the inner hole 11 of the coating material nozzle 12. The pattern of the sprayed coating material can be changed in various ways by moving the air nozzle 15 forward and backward using the advancing/retracting metal piece 41 and changing the amount of compressed air from the air nozzle 15 using the metering cock 52. sell.

In addition, the spray gun 1 can be used for tiles and crater pattern coating materials that could not be used with conventional airless guns due to the high pumping pressure, and architectural coating materials containing coarse particles and fibers that could not be used due to the nozzle shape. In addition to being suitable for use in construction, the gun body can be made lighter and spraying can be performed continuously, improving workability and handling compared to conventional construction guns. In addition, the high-pressure air source C and the coating material pressure feeding device P can be a conventionally used air compressor for an airless gun, an airless pump, or an electric airless pump connected to a paint container such as a pail can or drum, making the device more compact. , making it possible to reduce costs.

Further, FIGS. 2 to 4 illustrate the spray nozzle 61 of the airless gun 3 used for finishing coating.

In this example, the spray nozzle 61 has a substantially U-shaped cutout groove 63A at the tip of a circular base 63 surrounding a locking collar 62, and has a stepped center hole 63B inside, and a center hole ti3B. is provided with an internal tip 65 formed of a spherical tip and fitted with a stepped portion. Further, the internal chip 65 has a tapered nozzle hole 65A, and
The nozzle hole 65A has a slit opening 65B parallel to the notch groove 63A at its tip. Therefore, the spray nozzle 61 can spray in a spray pattern that is regulated in the middle direction of the 0 character and spreads in the direction of the notch, and both edges of the pattern are made thin and soft, so that the overlapped areas are not noticeable. .

Therefore, the spray gun 1 can be used as a conventional airless gun by replacing the air discharging device 20 with a conventionally used spray nozzle 61, and by connecting a coating material pressure feeding device that accommodates a finishing coating material such as a coating material. can be used, and its versatility can also be improved.

(Effects of the Invention) As shown in Ujigami, the spray gun of the present invention includes an airless gun, a housing having a main portion forming a guide hole larger than the inner diameter of the mounting portion, and an air discharge pipe. Since the tool is removably attached, it is possible to continuously spray tiles, architectural coating materials such as crater-like pattern coating materials, etc., which improves workability.It also improves handling by reducing the weight of the gun body. The high-pressure air source and coating material feeding device that can be used as an airless gun can be used as is, making the device more compact and reducing costs. By replacing the air discharge device with a spray nozzle, it can also be used as a conventional airless gun.
It can have many effects, such as increasing its versatility.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a front view of a conventional airless gun, and FIGS. 3 and 4 are a sectional view and a perspective view of a conventional spray nozzle for an airless gun. 2.--Tip opening, 3-.Airless gun, 5.--
Mounting part, 6... Joint part, 7- Main part, 9- Guide hole,
10...Tip, 11...Inner hole, 12...-Coating material nozzle, 13-Housing, 15...Air nozzle, 16-...Rear end, 17...-Rear wall, 19-
- Air pipe, 20 - Air discharge tool, C... - High pressure air source, Dl, D2 - Inner hole diameter. Patent applicant Meiji Kikai Seisakusho Co., Ltd. Agent
Patent Attorney Tadashi Naemura Figure 2 311

Claims (1)

[Claims] (1) An airless gun capable of discharging coating material fed under high pressure from an opening at its tip, including a main part formed approximately parallel to the mounting part through a joint part at the mounting part, and the mounting part and the main part. A guide hole is formed in which the inner hole of the main part is larger than the inner hole diameter of the mounting part, and a coating material nozzle having a cone-shaped inner hole at the tip communicating with the guide hole is installed at the tip of the main part. a housing having an air nozzle concentric with the inner hole of the coating material nozzle at the tip thereof, and a high-pressure air source connected to the rear end; A spray gun comprising: an air discharge tool having an air pipe protruding from the air pipe, which is attached so as to be movable and fixed; the inner hole of the attachment part and the tip opening of the airless gun are connected to each other, and the air discharge tool is detachably attached.