JP2001200969A - Swivel joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a swivel joint unentangling in feeding tubes (hoses) of respective liquid in simultaneous or mixing atomization by supplying the two liquids and carrying out efficient work by reducing these resistance in operation of an atomizing gun body. SOLUTION: A male screw is arranged on the one end side outer periphery of a hollow pipe shaft. A connecting metal fitting for a fluid hose can be installed. A swivel tube coupling metal fitting is installed on the other end side to this. While an air introducing pipe is installed in a central part of the hollow pipe shaft so as to surround the outer periphery, the air introducing pipe has an air hose connecting metal fitting on one end side. Specific clearance is formed between the air introducing pipe and the hollow pipe shaft. Air passed through a valve element is guided and moved in the clearance. A tube ring receiving seat is rotatably installed on the other end side of the air introducing pipe via a ball bearing and an O ring. An air taking-out connecting metal fitting is installed on the tube ring receiving seat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swivel joint for use in the middle of a pipe when mixing and spraying a fluid such as water, oil or paint and air.

[0002]

2. Description of the Related Art Conventionally, when a fluid such as water, oil or paint and air are mixed and sprayed at the end of a discharge port of a gun body,
The hose for the fluid flowing in the gun body is connected to the liquid tank, while the other one for air atomization is connected to the compressor, so that the gun body has two connections.
A book hose will be provided. By the way, during operation of the gun body for ejecting one liquid, a one-liquid swivel joint for reducing the resistance between the gun body and the hose connection so that effective work can be obtained is commercially available. Have been.

[0003]

The present invention is different from the conventional one-liquid type in that two liquids are supplied and each liquid supply pipe (hose) does not become entangled at the time of mixing and spraying the two liquids, and the gun body is made of these. The present invention does not provide a two-component connection fitting that enables efficient execution of work without being affected by the influence on the market.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a male screw is provided on the outer periphery of one end of a hollow tube shaft so that a fitting for a fluid hose can be attached thereto, while a swivel tube fitting is provided on the other end. On the other hand, an air introduction pipe was attached to the center of the hollow pipe shaft so as to surround the outer periphery thereof, and the air introduction pipe was provided with an air hose connection fitting on one end side. In addition, a certain gap is formed between the air introduction pipe and the hollow pipe shaft so that the air passing through the valve body is guided and moved in the gap, and the air introduction pipe is On the other end side, a tube seat is rotatably mounted via a ball bearing and an O-ring, and a fitting for taking out air is attached to the tube seat.

[0005]

FIG. 1 is a longitudinal sectional view of a swivel joint according to the present invention. 1 is a fixed length (3-5cm)
A hollow tube shaft having dimensions is provided. A male screw 2 is engraved at one end, and a fitting 3 for a fluid hose is attached to a front half portion of the male screw 2.

[0006] Reference numeral 4 denotes an air introduction pipe disposed around the center of the hollow pipe shaft 1 so as to surround the outer periphery thereof.
One end of the air introduction pipe 4 is fixedly secured via the rear half of the male screw 2. Here, the air introducing pipe 4 is provided with a square pipe 5 protruding at a fixed length (1 cm to 2 cm) at one place of an outer peripheral portion thereof. 6 is attached. In this example, the flow rate control valve 7 is attached in the middle of the square tube 5, and by opening and closing the valve portion 7b by moving the valve rod 7a in the left and right directions in the directions of arrows (a) and (b). Is the passage m
The adjustment of the amount of air from to n is performed. Reference numeral 8 denotes a round screw for closing the passage n, and reference numerals 9 and 10 denote O-rings.

[0007] Thus, the air introduction pipe 4 is a hollow pipe shaft 1.
A constant gap t is formed between the outer circumference of the ring and the outer circumference of the ring, and the inflow air is guided and moved so as to be communicated with a ring seat having an air hose connection fitting described below.

Reference numeral 12 designates a ring seat which is also mounted on the hollow tube shaft 1, and is provided with a branch pipe 12a for attaching an air hose connection fitting for taking out the air on a part of the outer peripheral surface. One end of the ring seat 12 is connected to the air introduction pipe 4.
Snap ring 9,14,1 fixed on hollow tube shaft 1 on the other end via bearing 13a
5 and rotatably mounted on the hollow tube shaft 1 via a bearing 13b. Fifteen
And 16 are O-rings for sealing.

In this embodiment, the side of the hollow tube shaft 1 opposite to the side on which the fluid hose fitting 3 is mounted has a swivel joint structure, that is, a ring-shaped outer peripheral surface near the tube end. A convex body 17 is formed, and a cap nut 18 is attached in a state of being locked to the convex body 17.

FIG. 2 is a diagram showing a state of use, which is an example of use in a coating gun apparatus for spray-painting an object to be coated. The inventor of the present invention has previously disclosed Japanese Patent No. 29170 as a coating gun device which can be suitably used for coating a hull or the like.
No. 13 coating gun equipment was provided. The apparatus is provided with a spray nozzle body for the coating liquid in the center, constitutes a cone-shaped or disk-shaped hood that surrounds the spray nozzle body and expands outward, and forms an intermediate wall of the hood. A large number of outside air inlet holes are formed in a state parallel to a line passing through the center, and an outer peripheral edge of the hood is parallel to a line passing through the center and 1 ° to 25 °.
A plurality of compressed air ejection holes having an inclination angle of 0 ° are arranged at equal intervals.
9 is a gun body, 20 is a hood body for ejecting compressed air which is attached so as to surround a nozzle body at the center thereof, 21
Denotes an operation lever, and a liquid transfer pipe 22 on the hand side of the gun body 19.
To the cap nut 18 of the swivel joint 1 having the above configuration.
The branch pipe 13 of the ring wheel seat 12 and the hood body 20 are connected by an air pipe 24.

Reference numerals 25 and 26 denote a coating liquid pipe and a compressed air pipe which are sent from separate devices. Of these, the coating liquid pipe 25 is connected to the connection fitting 3 for the liquid hose of the swivel joint 1. The compressed air 26 is connected to the air hose connection fitting 6 of the branch pipe 5a. During the spraying of the coating liquid 27 from the center of the gun body by operating the operation lever,
The compressed air 28 is blown from the hood body 20 so as to surround the outer periphery.

FIG. 3 shows a second embodiment. That is, the one shown in FIG. 1 has a configuration in which the swivel connection fitting is directly attached to the outlet side of the liquid sending pipe from the beginning, but in the present embodiment, a connection fitting without such a configuration is provided.
This is an example in which a jig for enabling free rotation is provided. Reference numeral 29 denotes a cap nut mounted on the hollow tube shaft 1 on the side opposite to the fluid hose fitting 3, and the inner female screw v of the cap nut 29 is a male screw w at one end of the hollow tube shaft 1.
And screwed together.

Reference numeral 30 denotes a male screw engraved in the vicinity of the outer peripheral end of the cap nut 29. One cap nut 31 is mounted in a mating state via the male screw 30. 31 is a swivel shaft 3 between the cap nut 29
2 so that the swivel shaft 32 holds the front and rear of the body portion a with the washer 33 and the washer 3.
4 and a seal member 35 is interposed between the both washers, and the presser washer 33 is attached to the cap nut 31.
A spring 36 is stretched between the inner surface of the spring 36 and the inner surface of the spring.

On the other hand, a ring groove 37 is formed in the neck portion b of the swivel shaft 32, a ball 38 is fitted into the groove 37, and a similar groove is formed on the inner peripheral side of the cap nut 29 which is opposed to this. The swivel shaft 32 is stopped in a freely rotating state each time the ball 38 is engaged between the two grooves, and a sealing plug 39 after the ball 38 is fitted is provided.

On the other hand, a male screw 40 is engraved on the outer periphery of the head c of the swivel shaft 32, and a nut 4 screwed to the male screw 40 is formed.
In this example, the liquid transfer pipe 22 on the hand side of the gun body 19 is fixed. At this time, reference numeral 42 denotes a flange member for stopping the tightening of the nut 41. In this embodiment, the structure for introducing the compressed air and leading it out to the hood body is the same as that of the first embodiment.

[0016]

The present invention is constructed as described above. By using the swivel joint according to the present invention, the operator can operate the gun body 19 at hand very smoothly. When the user swings or swings a certain distance in the front-back or left-right direction while holding the hand 19 in his / her hand, the compressed air pipe ejected so as to surround the coating liquid and its surroundings does not become entangled at all. Therefore, it contributes to the improvement of work performance.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a swivel joint according to the present invention.

FIG. 2 is an explanatory diagram of a use state.

FIG. 3 shows another example of a swivel joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow pipe shaft 3 Fluid hose connection fitting 4 Air introduction pipe 5 Square pipe 6 Air hose connection fitting 7 Flow control valve 12 Ring ring seat 19 Gun body 20 Hood body 21 Operation lever 22 Liquid feed pipe 24 Air pipe 25 Coating liquid Pipe 26 Compressed air pipe 27 Coating liquid 28 Compressed air 32 Swivel shaft

Claims (2)

[Claims] 1. A male screw is provided on an outer periphery of one end of a hollow tube shaft,
No fluid hose connection fittings can be attached, whereas the other end has swivel fittings attached.
On the other hand, an air introduction pipe is attached to the center of the hollow pipe shaft so as to surround the outer periphery thereof, and the air introduction pipe is provided with an air hose connection fitting on one end side. A certain gap is formed between the hollow pipe shaft and the air passing through the valve body so as to be guided and moved in the gap, and a ring is provided at the other end of the air introduction pipe. A swivel joint, wherein a seat is rotatably mounted via a ball bearing and an O-ring, and a fitting for taking out air is mounted on the tube wheel seat. 2. The swivel joint according to claim 1, wherein a flow control valve body for inflow air is attached to the air introduction pipe.