JP6095611B2 - Paint - Google Patents

Description

  The present invention relates to a coating tool used for coating, in particular, anticorrosion coating of mechanical equipment such as air conditioners.

  Conventionally, anti-corrosion paint is applied to the outer wall of mechanical equipment such as air conditioners to prevent corrosion. The anti-corrosion paint may be applied by spray coating. However, spray coating on machine equipment such as air-conditioning equipment is either a spray gun that creates a negative pressure with compressed air and mixes it with the paint, or a pressure that is weak to the paint ( 0.1 to 0.3 MPa), and mixed with compressed air for spraying.

  For example, as shown in Patent Document 1, as a spray gun of a system in which a negative pressure state is created with compressed air and mixed with a paint and sprayed, adjusted air that makes the sprayed paint particles into a shape convenient for paint work It has been known that the size and shape of the spray pattern such as a circular pattern or an oval pattern can be changed by adjusting the amount of air ejected from the adjustment air port.

JP 2004-121975 A

  However, spray coating with a spray gun as shown in the above-mentioned Patent Document 1 is based on the premise that the paint is sprayed vertically on the object to be coated, and since the spray paint blows out in a conical shape from the nozzle and spreads in a circular state. In addition, a large amount of paint can be sprayed to coat a wide area, but the spray paint cannot be fed far away. Even if the amount of air ejected by the adjustment air port is adjusted to make the ejection pattern into a small circle state, the paint is deeply applied to the aluminum fins arranged at a narrow interval of 1 to 2.5 mm like a heat exchanger. It was difficult to feed in, and even if it was forcibly sent, uniform coating could not be achieved due to liquid dripping on the object having a large surface area such as aluminum fins.

  The present invention has been made in view of the above circumstances, and spray paint can be fed to the back of a large number of objects to be coated arranged at a narrow interval such as aluminum fins of a heat exchanger of an air conditioner. An object of the present invention is to provide a coating tool capable of uniform coating.

In order to solve the above problems, the invention is a spray gun is formed a fixing portion which is fixed relative to the spray gun is formed on the back side of the block body, on the front side of the block body according to claim 1 of the present Application A through hole through which the paint spraying portion of the spray gun is exposed in a fixed state, and a plurality of high-pressure air jets disposed on the outer periphery of the through hole through which the paint spraying portion is exposed. The front side has a front side concave portion that is substantially rectangular in front view on the outer side of the through hole, and the left and right side portions of the through hole of the front side concave portion are inclined in the front direction as they extend to the left and right outer sides. The high-pressure air outlet is disposed on the outer periphery of the front-side recess, and the air passage that blows the high-pressure air to the high-pressure air outlet approaches the central axis of the through hole. So as to be inclined The outer periphery of the spray paint is sprayed from the paint spray unit is formed Te, characterized by a Turkey to form a pressure air layer flowing in a straight line towards the spraying direction.
In addition, the invention according to claim 2 of the present application includes a paint spraying part for ejecting paint, and a plurality of high-pressure air jets arranged on the outer periphery of the paint spraying part, and on the outside of the paint spraying part The high-pressure air outlet has a substantially rectangular front-side recess, and a right-and-left side portion of the paint spraying portion of the front-side recess has a jet adjustment portion that inclines in the front direction as it spreads to the left and right outside. Is arranged on the outer periphery of the front-side recess, and the air passage for sending the high-pressure air to the high-pressure air outlet is formed so as to be inclined so as to approach the central axis of the paint spraying unit. A high-pressure air layer that flows linearly toward the spray direction is formed on the outer periphery of the spray paint sprayed from the spray section.

  According to the present invention, spray paint can reach the back of the gap sufficiently even on the objects to be coated such as aluminum fins of air-conditioning equipment lined up at a narrow interval, and uniform coating is performed. Can do.

It is a figure which shows a general spray gun. It is explanatory drawing which shows the state which sprayed the coating material with respect to the aluminum fin of an air conditioner with the spray gun shown in FIG. 1, (a) is a front view, (b) is a top view, (c) is a side view. is there. It is explanatory drawing (plan view) which shows the state which sprayed the coating material with respect to the aluminum fin of the air conditioner with the coating tool of this invention. It is a front view of the high pressure air blowing nozzle which is an embodiment of the paint implement of the present invention. It is a reverse view of the high pressure air ventilation nozzle which is embodiment of the coating tool of this invention. It is a side view of the high pressure air blowing nozzle which is an embodiment of the paint implement of the present invention. It is a bottom view of the high pressure air blowing nozzle which is an embodiment of the paint implement of the present invention. It is explanatory drawing of the state which mounted | wore the spray gun shown in FIG. 1 with the high pressure air ventilation nozzle which is embodiment of the coating tool of this invention. It is a front view of the high pressure air ventilation nozzle part of the state which mounted | wore the spray gun shown in FIG. 1 with the high pressure air ventilation nozzle which is embodiment of the coating tool of this invention.

The coating tool of the present invention will be described with reference to the drawings.
FIG. 1 shows a general spray gun 1 used for anticorrosion coating of mechanical equipment such as an air conditioner, and includes a spray tip 12 for spraying spray paint at the tip and a trigger for operating the spraying operation. An air supply means 13 and a paint supply means 14 are connected to a main body 11 to which 15 is swingably attached.

  The spray tip portion 12 includes a paint spray portion 12a for spraying paint atomized by compressed air, and an adjustment air jet portion 12b for adjusting the atomized paint to a shape convenient for painting work. The coating material is sprayed conically from 12a.

  FIG. 2 illustrates a state when the paint is sprayed by the spray gun 1 shown in FIG. 1 on the heat exchanger 2 such as an air conditioner. The heat exchanger 2 has a plurality of aluminum fins 21 formed by drilling a predetermined number of holes in an aluminum plate, arranged at predetermined intervals, and a pipe 22 made of a copper tube or an aluminum tube in the hole of the aluminum fin 21. Are integrally formed by press-fitting. The interval between the aluminum fins 21 is 1 to 7 mm, and particularly frequently used is 1 to 2.5 mm. Therefore, in the spray gun 1 in which the spray paint a is sprayed in a conical shape, the spray paint a is spread in a conical shape. In addition, since the pressure is low, it does not fly far, and even if the pressure of the compressed air is increased, the range to be painted is only 3 to 5 mm deep from the surface, and it can be painted to the depth between the aluminum fins 21. could not.

  Therefore, as shown in FIG. 3, the coating tool 3 of the present invention has a high-pressure air jetting means 31 having at least a high-pressure air jet on the outer periphery of the paint spraying portion 12a, and is placed outside the spray paint a in the painting direction. By forming the high-pressure air layer b that flows linearly and parallelly toward the surface, the spray paint a is placed on the high-pressure air and is blown linearly and under pressure, and provided at a narrow interval like the heat exchanger 2. The spray paint a can be fed into the aluminum fin 21 or the like to the back.

-Embodiment-
(Configuration of high-pressure air blowing nozzle)
With reference to FIGS. 4-7, the high pressure air ventilation nozzle 4 which is embodiment of the coating tool of this invention is demonstrated concretely.
The high-pressure air blowing nozzle 4 which is an embodiment of the coating tool of the present invention comprises a cubic block main body 41 made of, for example, aluminum, and a spray tip 12 of the spray gun 1 shown in FIG. A mounting concave portion (fixed portion) 42 for mounting a coating is formed, and a front-side concave portion 43 is formed on the other surface facing the one surface over the spraying range of the paint sprayed from the paint spraying portion 12a of the spray gun 1. Has been. A through hole 44 penetrating the block main body 41 is formed from the bottom of the mounting recess (fixed portion) 42 to the front-side recess 43. The one surface on which the spray gun 1 of the block body 41 is mounted is referred to as a “back surface”, and the other surface on which the spray paint of the spray gun 1 is ejected is referred to as a “front surface”.

  The outer periphery of the through hole 44 at the bottom of the mounting recess (fixed portion) 42 is a contact portion 42a with which the front outer periphery of the spray tip 12 abuts when the spray gun 1 is mounted, and the mounting recess (fixed portion). At a position above 42, the spray tip 12, which is composed of a screw hole and a thumbscrew penetrating from the upper surface of the mounting recess (fixed portion) 42 to the upper surface of the block body 41, Fixing means 45 for fixing is provided.

  The through-hole 44 includes a main through-hole 44a having a bowl shape in front view that exposes the paint spraying portion 12a of the spray tip 12 of the spray gun 1 mounted in the mounting recess (fixed portion) 42 to the front, and the main through-portion 44a. It consists of upper and lower semicircular portions 44b and 44b that are continuously provided at the upper and lower central positions and expose the upper and lower regulated air ejection portions 12b and 12b of the spray tip 12 of the spray gun 1, and have a substantially cross shape as a whole. Yes.

  The front-side concave portion 43 has a substantially rectangular shape in front view formed by extending the main through-hole 44a in a front view shape of the through-hole 44 to the outside. As it expands, a jet adjustment part 43a is formed which is inclined toward the front direction. Thus, by forming the front side concave portion 43 including the ejection adjusting portion 43a outside the through hole 44, the spray paint a ejected from the paint spraying portion 12a is within the front side concave portion 43 immediately after the spraying. Since it can be diffused smoothly and then flies on high-pressure air, it can be applied uniformly over the coating area.

  High-pressure air jets 46 are arranged in two rows along the long side of the outer periphery of the front side recess 43 that is substantially rectangular in front view, and at the tip positions of the upper and lower semicircular portions 44b, 44b of the through hole 44. In addition, the high-pressure air jet 46 is arranged, and the high-pressure air jet 46 is arranged so as to surround the outer periphery of the through hole 44 and the front-side concave portion 43 as a whole.

  A high pressure air inlet 47 is provided on the lower surface of the front side of the block body 41, and a high pressure air supply means 48 for supplying high pressure air is connected to the high pressure air inlet 47, and a high pressure air is provided in the block body 41. An air passage 49 for blowing high-pressure air from the air inlet 47 to the high-pressure air outlet 46 is provided. The air passage 49 includes a main air passage 49a that extends from the high-pressure air inlet 47 to a position substantially behind each high-pressure air outlet 46, and a sub-air passage that continues in the substantially ejection direction from the main air passage 49a toward the high-pressure air outlet 46. 49b, and each sub-air passage 49b is inclined so as to approach the central axis of the main through-hole 44a of the through hole 44 as it approaches each high-pressure air outlet 46 (for example, about 5 degrees). The high-pressure air ejected from the outlet 46 is ejected slightly inward.

(How to use the high pressure air blowing nozzle)
With reference to FIGS. 8 and 9, a method of using the high-pressure air blowing nozzle 4, which is an embodiment of the coating tool of the present invention, mounted on the spray tip 12 of the spray gun 1 shown in FIG. 1 will be described.
The spray tip 1 of the spray gun 1 is inserted into the mounting recess (fixed portion) 42 from the back side of the high-pressure air blowing nozzle 4, and the spray gun 1 is attached to the spray gun 1 by the fixing means 45 provided on the upper portion of the high-pressure air blowing nozzle 4. On the other hand, the high pressure air blowing nozzle 4 is fixed.

The spray tip portion 12 of the spray gun 1 inserted into the mounting recess (fixed portion) 42 has its paint spray portion 12a exposed to the front side through the main through portion 44a of the through hole 44, and the regulated air jet portion 12b. It is exposed to the front side through the upper and lower semicircular portions 44b, 44b of the through hole 44.
By operating the trigger 15 of the spray gun 1 in this state, it is possible to use the high pressure air blowing nozzle 4 without supplying high pressure air, that is, as a normal spray gun 1.

  And when painting to the to-be-coated objects lined up at narrow intervals like the aluminum fins 21 of the heat exchanger 2 such as an air conditioner, the high-pressure air blowing nozzle simultaneously with the spraying of the paint by the operation of the trigger 15 High pressure air is ejected from each of the four high pressure air ejection ports 46. Since the high-pressure air ejected from the high-pressure air ejection port 46 is ejected slightly inward, the outer periphery of the spray paint a is suppressed while preventing the spray paint a sprayed conically from the paint spraying portion 12a. The high-pressure air layer b is formed, and the spray paint a is placed on the high-pressure air, so that the paint can be fed farther by applying pressure in a straight line and parallel to the spray direction as a whole.

  In order to eject high-pressure air from each high-pressure air outlet 46 of the high-pressure air blowing nozzle 4, high-pressure air supply means 48 such as a compressor connected to the high-pressure air inlet 47 of the high-pressure air blowing nozzle 4 is driven. Can be performed. Further, the ejection of the high-pressure air from the high-pressure air ejection port 46 may be controlled independently of the ejection of the spray paint a of the spray gun 1, but is controlled in conjunction with the operation of the trigger 15 of the spray gun 1. Is also possible.

  In the above embodiment, the high-pressure air blowing nozzle 4 is formed separately from the spray gun 1, but the high-pressure air blowing nozzle 4 may be formed integrally with the spray gun 1 to constitute a paint tool. Is possible.

DESCRIPTION OF SYMBOLS 1 Spray gun 11 Main body 12 Spray tip part 12a Paint spraying part 12b Control air ejection part 13 Air supply means 14 Paint supply means 15 Trigger 2 Heat exchanger 21 Aluminum fin 22 Piping 3 Paint tool 31 High pressure air ejection means 4 High pressure air blowing Nozzle 41 Block body 42 Mounting recess (fixed part)
42a Contact part 43 Front side recessed part 43a Ejection adjusting part 44 Through hole 44a Main through part 44b Semicircular part 45 Fixing means 46 High pressure air outlet 47 High pressure air inlet 48 High pressure air supply means 49 Air supply path 49a Main air supply path 49b Sub Air passage a Spray paint b High pressure air layer

Claims (2)

A fixing part formed on the back side of the block body and fixed to the spray gun, and a through-hole formed on the front side of the block body and fixed to the spray gun to expose the paint spraying part of the spray gun And a plurality of high-pressure air jets disposed on the outer periphery of the through hole where the paint spraying part is exposed,
As the front side of the block main body has a front side concave portion in a substantially rectangular shape in front view on the outside of the through hole, and the left and right side portions of the through hole of the front side concave portion spread outward in the left and right sides. It has a jet adjustment part that inclines in the front direction,
The high-pressure air outlet is disposed on the outer periphery of the front-side concave portion, and the air passage that blows the high-pressure air to the high-pressure air outlet is formed to be inclined so as to approach the central axis of the through hole. painting tool, characterized the Turkey to form a pressure air layer flowing in a straight line on the outer periphery of the spray paint is sprayed from the cage paint spraying section toward the spray direction. A paint spraying part for jetting paint, and a plurality of high-pressure air jets arranged on the outer periphery of the paint spraying part,
The outside of the paint spraying part has a substantially rectangular front side recess, and the right and left side part of the paint spraying part of the front side recess has a jet adjustment part that inclines in the front direction as it spreads to the left and right outside. Have
The high-pressure air outlet is disposed on the outer periphery of the front-side concave portion, and the air passage that blows the high-pressure air to the high-pressure air outlet is formed to be inclined so as to approach the central axis of the paint spraying portion. and has a coating appliance it and forming a high pressure air layer flowing in a straight line towards the spraying direction on the outer periphery of the spray paint is sprayed from the paint spray unit.

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