JP3058554B2 - Two-fluid supply guide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-fluid supply guide device for supplying two kinds of fluids through separate tubes.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, paint is supplied to a spray gun 1 for painting by a paint tube 3 connected to a paint supply port 2 of the spray gun 1. Air is supplied by an air tube 5 connected to the air supply port 4 of the first unit, and a trigger 6 is operated to open a paint needle valve (not shown) via a rod 6a and to open an air valve (not shown) via a rod 6b, The paint sprayed from the paint nozzle 7 of the spray gun is finely atomized by air ejected from the air nozzle 8 and formed into a specific pattern shape.

The paint tube 3 and the air tube 5
Is a structure in which two nylon tubes and the like are integrated by a holding plate 9 at fixed intervals.

[0004]

As described above, the holding plate 9
Thus, the two flexible tubes integrated at a constant interval are bulky and difficult to handle, and have problems such as difficulty in free winding on a reel.

[0005] The present invention has been made in view of the above points, and by combining two flexible tubes into one,
The purpose is to facilitate the handling.

[0006]

According to a first aspect of the present invention, there is provided a two-fluid supply guide device for supplying one fluid and the other fluid by flexible tubes, respectively. And a small-diameter tube for supplying fluid, which is fitted inside the large-diameter tube through a gap and protrudes from the openings at both ends of the large-diameter tube, and a projecting portion of the small-diameter tube. One perimeter
The end connection ports are fitted respectively, and the other end connection ports are fitted to the outer peripheral surfaces of both ends of the large-diameter tube, respectively, and are connected to the intermediate connection port of one of the three-port pipe joints. The one-fluid introduction portion connected to the opening at one end of the large-diameter tube and the one-fluid withdrawal connected to the intermediate connection port of the other three-port joint and connected to the opening at the other end of the large-diameter tube And a two-fluid supply guide device having a configuration including:

According to a second aspect of the present invention, in the two-fluid supply guide device according to the first aspect, a gap between the large-diameter tube and the small-diameter tube is used as an air passage for supplying air to the spray gun, and the inside of the small-diameter tube is formed. This is a two-fluid supply guide device configured as a paint passage for supplying paint to a spray gun.

[0008]

According to the first aspect of the present invention, one fluid is supplied from the introduction portion to the opening at one end of the large-diameter tube via one three-necked pipe joint, and is passed through the gap between the large-diameter tube and the small-diameter tube. One fluid is taken out of the drawing part from the opening at the other end of the diameter tube through the other three-necked joint. On the other hand, the fluid is supplied through the inside of the small diameter tube.

According to the present invention, air is supplied to the spray gun through a gap between the large-diameter tube and the small-diameter tube, and paint is supplied to the spray gun through the inside of the small-diameter tube.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in FIGS. Note that the same members as those in the conventional example of FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 1, a small-diameter tube 12 is fitted into a large-diameter tube 11 having a relatively large diameter via a gap. The large-diameter tube 11 is a flexible tube for supplying one fluid (air), and the small-diameter tube 12 is a flexible tube for supplying the other fluid (paint).

That is, the large-diameter tube 11 and the small-diameter tube
An air passage 13 for supplying one fluid (hereinafter referred to as air) to the spray gun is provided between the small diameter tube 12 and a paint for supplying the other fluid (hereinafter referred to as paint) to the inside of the small-diameter tube 12 to the spray gun. Passageway 14.

The small-diameter tube 12 protrudes from openings 15 and 16 at both ends of the large-diameter tube 11, and extends from an outer peripheral surface of the projecting portion of the small-diameter tube 12 to an outer peripheral surface of both ends of the large-diameter tube 11. T-type fittings 17 as fittings
And a T-shaped joint 18 as the other three-necked joint.

An air introduction tube 21 as an air introduction portion is connected to an intermediate connection port 17c of one T-shaped pipe joint 17,
The large-diameter tube 11 communicates with an opening 15 at one end. An air outlet tube 22 as an air outlet is connected to the intermediate connection port 18c of the other T-shaped pipe joint 18, and communicates with the opening 16 at the other end of the large diameter tube 11.

Each of the T-shaped pipe joints 17, 18 has a seal mechanism 23, 24 for the small diameter tube 12, a one-touch joint mechanism 25, 26 for receiving the insertion of both ends of the large diameter tube 11,
One-touch joint mechanisms 27 and 28 for receiving insertion of the air introduction tube 21 or the air extraction tube 22 are provided.

Sealing mechanisms 23, 24 for small diameter tube 12
A nut 32 is screwed into a thread portion 31 formed at one end connection port portion 17a, 18a of each of the T-shaped pipe joints 17, 18, and a packing 33 is provided between the distal end surface of the thread portion 31 and the inner end surface of the nut 32. Are pressed.

The one-touch coupling mechanisms 25, 26, 27, 28
A sealing portion 41 which is fitted between the other end connection ports 17b, 18b and the intermediate connection ports 17c, 18c of the tubular fittings 17, 18 and the tubes 11, 21, 22 to maintain airtightness therebetween; , 2
A holding mechanism 42 which receives insertion of the first and second 22 while resisting their withdrawal, an opening mechanism 43 for canceling the retaining action of the holding mechanism 42, and a connection opening of the T-shaped fittings 17 and 18. And a locking portion 44 which is fitted and locked on the wall surface and locks the opening mechanism 43. When the holding mechanism 42 is pressed by the tip of the opening mechanism 43, the holding mechanism 42 is deformed in the radially expanding direction, and the tubes 11, 2 are deformed.
Release the locking action for 1,22.

As shown in FIG. 2, the tip of the small diameter tube 12 is connected to the paint supply port 2 of the spray gun 1. The base end of the small diameter tube 12 is connected to a discharge port of a paint pump (not shown).

The air outlet tube 22 drawn from the T-shaped pipe joint 18 on the distal end side of the large-diameter tube 11 passes through an elbow joint 45 provided with a one-touch joint mechanism, an adapter 46, and the like, and an air supply port of the spray gun 1. It is connected to the unit 4. On the other hand, the air introduction tube 21 connected to the T-shaped pipe joint 17 on the base end side of the large-diameter tube 11 is connected to an air compressor via a pipe joint 47 having a one-touch joint mechanism, an air tube 48, and the like.

Next, the operation of the embodiment shown in FIGS. 1 and 2 will be described. Paint is supplied to the paint supply port 2 of the spray gun 1 through the paint passage 14 in the small-diameter tube 12 by the paint pump. You. At the same time, the air pressurized and supplied from the air compressor (not shown) to the air introduction tube 21 passes through the T-shaped pipe joint 17 and opens at the proximal end of the large-diameter tube 11.
15, passes through an air passage 13 between the large-diameter tube 11 and the small-diameter tube 12, passes through an opening 16 on the distal end side of the large-diameter tube 11, passes through a T-shaped fitting 18, an air extraction tube 22,
Is supplied to the air supply port 4 of the spray gun 1.

As the three-necked pipe joint, a Y-shaped pipe joint may be used in addition to the T-shaped pipe joint.

[0022]

According to the first aspect of the present invention, a small-diameter tube is fitted into a large-diameter tube through a gap between a pair of three-port fittings, and two flexible tubes are connected to one tube. Because of this, it is possible to easily handle the tube during that time, and for example, it is possible to freely take up the tube with a reel.

According to the second aspect of the present invention, the air and the paint can be separately supplied to the spray gun. In particular, the gap between the large-diameter tube and the small-diameter tube is used as an air passage, and the inside of the small-diameter tube is coated with the paint. The passage is advantageous in that clogging of the paint is less likely to occur than in the reverse case.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a two-fluid supply guide device of the present invention.

FIG. 2 is an explanatory view showing a state in which the two-fluid supply guide device is connected to a spray gun.

FIG. 3 is an explanatory view showing a state in which a conventional two-fluid supply guide device is connected to a spray gun.

[Explanation of symbols]

 1 Spray gun 11 Large-diameter tube 12 Small-diameter tube 13 Air passage as gap 14 Paint passage 15,16 Opening 17,18 T-shaped fitting as three-port fitting 21 Air introduction tube as introduction part 22 Air withdrawal as drawing part tube

Claims (2)

(57) [Claims] 1. A two-fluid supply guide device for supplying one fluid and another fluid by flexible tubes, respectively. A large-diameter tube for supplying one fluid formed with a relatively large diameter; A small-diameter tube for fluid supply, which is fitted into the inside of the tube via a gap and protrudes from the openings at both ends of the large-diameter tube, and a connection port at one end is provided on the outer peripheral surface of the projection of the small-diameter tube.
A pair of three-necked pipe fittings , each of which is fitted to the other end of the large-diameter tube and fitted to the outer peripheral surface of both ends of the large-diameter tube, and a large-diameter pipe connected to an intermediate connecting port of one of the three-ported pipe joints. The one-fluid introduction part communicated with the opening at one end of the tube, and the one-fluid withdrawal part connected to the intermediate connection port of the other three-port fitting and communicated with the opening at the other end of the large-diameter tube. A two-fluid supply guide device, comprising: 2. A method according to claim 1, wherein the gap between the large-diameter tube and the small-diameter tube is an air passage for supplying air to the spray gun, and the inside of the small-diameter tube is a paint passage for supplying paint to the spray gun. 2. The two-fluid supply guide device according to claim 1.