JP2001193888A - Tube fitting with opening and closing mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tube fitting for transporting a fluid, more specifically a tube fitting with opening and closing mechanism. SOLUTION: This tube fitting comprises a socket having a cavity part for passing the fluid and an inner collar screwed to the cavity part. The socket has a means for fixing one end of a hose on the circumference, and the cavity part is formed of a minor diameter cavity part from the tip side, a major diameter cavity part continued thereto, and a female screw part to be screwed to the inner collar. The inner collar is at least formed of a minor diameter part and major diameter part fitted to the minor diameter cavity part and major diameter cavity part from the tip side, and a male screw part screwed to the female screw part, and comprises a cavity part bottomed on the tip side and opened on the rear end side and a bore part formed on the minor diameter part continuously thereto. A sealing O-ring is installed to the circumferential surfaces of the minor diameter part and major diameter part with the bore part between.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint for transferring a fluid, and more particularly to a pipe joint having an opening / closing mechanism.

[0002]

2. Description of the Related Art In recent years, hoses for sending air in air suspensions and the like of vehicles have been shifting from metal tubes to so-called resin tubes made of nylon, for example. The reason is that the resin pipe is more flexible than the metal pipe, so that it is excellent in applicability in a narrow space, and furthermore, the weight and cost can be reduced.

However, the air tank may be damaged in the event of a collision of a flying object from outside or a vehicle accident, and the flow of air must be stopped due to the necessity of repairing the air tank. is there. For this reason, it is conceivable to provide a cock for opening and closing the pipe joint, but it is inevitable that not only the structure as the pipe joint becomes complicated but also the cost increases. Further, if the cock protrudes from the pipe joint, the surrounding frame, clothes of the worker, etc. may be caught by the cock and may be opened and closed at an unexpected time, which is dangerous.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and has a relatively simple structure and has no cock for opening and closing. Is provided.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a first invention is a socket having a lumen through which a fluid passes, and a socket having the lumen. A pipe joint with an inner collar screwed to the
A means for fixing one end of the hose is provided on the outer periphery of the socket, and the inner cavity is formed with a small-diameter cavity and a large-diameter cavity following the small-diameter cavity from the distal end side, and subsequently, a female thread is formed to screw with the inner collar. The inner collar is composed of a small-diameter portion and a large-diameter portion fitted into the small-diameter cavity portion and the large-diameter cavity portion from at least the distal end side, and a male thread portion screwed with the female thread portion. A perforated portion is formed in the cavity and the small-diameter portion, the bottom of which is open at the rear end side, and a perforated portion connected to the cavity and the small-diameter portion.
The present invention relates to a pipe joint with an opening / closing mechanism, which is provided with a ring. Usually, a stopper for preventing the inner collar from coming off is provided in the female screw portion of the socket, and further, a means for fixing one end of the hose to the rear end side of the inner collar is provided.

A second aspect of the present invention further embodies the first aspect of the present invention, and includes a tube having a socket having a lumen through which a fluid passes, and an inner collar screwed into the lumen. A joint having a means for fixing one end of a hose on the outer periphery of the socket, and a small-diameter cavity portion and a large-diameter cavity portion following the small-diameter cavity portion are formed from the distal end side, and further, the inner cavity is screwed with the inner collar. A female thread portion and a stopper for preventing the inner collar from coming off, wherein the inner collar is screwed with the female thread portion and a small diameter portion and a large diameter portion that fit into the small diameter cavity portion and the large diameter cavity portion from at least the distal end side. It has a hollow portion and a small-diameter portion with a front end side having a bottom and a rear end side opened, and a perforated portion connected to the cavity portion.The small-diameter portion and the large-diameter portion sandwich the perforated portion. An O-ring for sealing is mounted on the outer peripheral surface of the A large-diameter portion into which the hose is inserted, an O-ring which functions as a seal in contact with the outer surface of the hose, and a claw portion having a claw facing the distal end side of the cavity portion, and a claw portion of the grab ring are provided. The present invention relates to a pipe joint with an opening / closing mechanism, which has a built-in pressing ring for pressing from the rear side, and an inner collar provided with an outer collar with an inner taper that comes into contact with the outer peripheral side of the pressing ring.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the second invention will be described in more detail. FIG. 1 is a half sectional view showing a main part of a pipe joint with an opening and closing mechanism, showing a “closed” state, and FIG. 2 is a half sectional view showing an “open” state.

In the drawing, reference numeral 1 denotes a socket made of brass,
The lumen 2 through which the fluid (air here) passes is perforated. A means for fixing one end of the hose, that is, a male screw part 3 screwed to a base mounted on the hose side (not shown) in this example is provided on one outer periphery of the socket 1, and the lumen part 2 is A small-diameter cavity portion 4 and a large-diameter cavity portion 5 following the small-diameter cavity portion 5 are formed from the end on the side, and a female screw portion 6 that is screwed with an inner collar described later is formed with a step portion 7 interposed therebetween. Therefore, in this example, the female screw portion 6 has the largest diameter. A groove 8 is formed in the rear end of the female screw portion 6, and a stop ring 9 is fitted into the groove 8 to prevent the inner collar from falling off. Note that the outer peripheral surface of the female screw portion 6 in the socket 1 forms a hexagonal bolt shape 10 and is used for rotation.

The inner collar 11 is also made of brass and has at least the small-diameter cavity portion 4 and the large-diameter cavity portion 5 from the distal end side.
A hollow portion 15 having a small-diameter portion 12 and a large-diameter portion 13 which fit into the female thread portion 6 and a male thread portion 14 which is screwed with the female thread portion 6; 1
2, a groove 17 and 18 are formed on the outer peripheral surface of the small-diameter portion 12 and the large-diameter portion 13 with the perforated portion 16 interposed therebetween, and an O-ring for sealing is formed. 19 and 20 are attached.

Further, the hollow portion 15 is provided with a large-diameter portion 21 into which a hose is inserted at the rear end side, and an O-ring 22 which is in contact with the outer surface of the hose and performs a sealing function.
Next, the cavity portion 15 has a built-in grab ring 23 in which the claw portion 23a faces the tip side, and a detaching ring 24 for pressing the claw portion 23a of the grab ring 23 from the rear side, and the outer periphery of the detach ring 24 in the inner collar 11. An outer collar 25 with an inner taper 25a that comes into contact with the side is provided. In this figure, an example is shown in which the outer collar 25 is integrated by caulking the rear end of the inner collar 11, but both may be completely integrated. In the figure, 26 is a backup ring.

Nylon hose 3 on outer collar 25 side
Numeral 0 denotes a sleeve in which a crush prevention sleeve 31 is fitted at its tip, which is inserted into the outer collar 25, reaches the tip of the enlarged diameter portion 21 of the inner collar 11, and the joining is completed. The hose 30 is completely prevented from falling off when the claw 23a of the grab ring 23 bites into its surface. When the internal pressure is applied due to the flow of air, the outer peripheral surface of the removal ring 24 located on the rear side of the grab ring 23 comes into contact with the internal taper 25a of the outer collar 25. If the internal pressure is applied, the inner ring is further tightened. It works in the direction in which it falls, so that falling off is completely prevented.

On the other hand, when the hose 30 is removed from the socket 1, of course, the flow of the internal air is stopped. However, the removal ring 24 is pressed to the distal end side to release the claw portion 23a of the grab ring 23 from biting. By pulling out the hose while maintaining this state, the hose can be easily removed.

In the pipe joint of the present invention, when the air is flowing, that is, in the "open" state, the small diameter portion 12 of the inner collar 11 is retained in the large diameter cavity portion 5 of the socket 1. In other words, the sealing O attached to the small diameter portion 12
The ring 19 is kept out of contact with the small-diameter cavity 4 of the socket 1; therefore, air from the hose (not shown) (the distal end of the socket 1) flows from the small-diameter cavity 4 to the large-diameter cavity 5; Then, it flows into the hollow portion 15 via the perforated portion 16 formed in the small-diameter portion 12 of the inner collar 11, and flows into the hose 30 as it is.

On the other hand, when the air flow is stopped, that is, in the "closed" state, the female screw portion 6 of the socket 1 and the inner collar 11
Of the outer collar 25 is further rotated by rotating the two or four faces 31 of the outer collar 25, the small diameter part 12 of the inner collar 11 is inserted into the small diameter cavity 4, and the O-ring 19 is The flow path is cut by completely contacting the surface of the small diameter cavity 4. Of course, in this case, it is needless to say that the O-ring 20 is also preferably brought into contact with the surface of the large-diameter cavity 5 for sealing.

[0015]

As described above, the pipe joint of the present invention can be easily opened and closed by adjusting the degree of screwing between the socket 1 and the inner collar 11 and can be easily achieved by the conventional one. The structure is relatively simple as compared with that of the first embodiment, and there is no possibility that the opening / closing mechanism operates due to no protrusion such as a cock from the outer surface of the joint.

[Brief description of the drawings]

FIG. 1 is a half sectional view showing a “closed” state of a pipe joint with an opening / closing mechanism.

FIG. 2 is a half sectional view showing an “open” state of the pipe joint of FIG. 1;

[Explanation of symbols]

 1 ‥ socket, 2 ‥ socket bore, 3 ‥ external thread formed on the outer circumference of the socket, 4 ‥ small diameter cavity at the distal end of the lumen 2, 5 ‥ large rear end of the lumen 2 6 mm female thread in bore 2, 11 mm inner collar, 12 mm small diameter, 13 mm large diameter, 14 mm male thread, 15 mm hollow, 16 mm perforation formed in small diameter, 19, 20 ‥ O-rings for sealing 19, 20, 23 ‥ grab ring, 24 ‥ removal ring, 25 ‥ outer collar, 30 ‥ hose.

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[Procedure amendment]

[Submission date] January 19, 2000 (2000.1.1)
9)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

Claims (4)

[Claims] 1. A pipe joint comprising a socket having a lumen through which a fluid passes, and an inner collar screwed into the lumen, wherein a means for fixing one end of a hose is provided on the outer periphery of the socket. Along with the inner cavity portion, a small-diameter cavity portion and a large-diameter cavity portion following the small-diameter cavity portion are formed from the distal end side, and further a female screw portion to be screwed with the inner collar is formed. A cavity comprising a small-diameter portion and a large-diameter portion which fit into the small-diameter cavity portion and the large-diameter cavity portion, and a male thread portion screwed with the female thread portion, wherein the front end side has a bottom and the rear end side is released. With an opening and closing mechanism characterized in that a perforated portion connected to this is formed in the portion and the small diameter portion, and a sealing O-ring is attached to the outer peripheral surface of the small diameter portion and the large diameter portion across the perforated portion. Pipe fittings. 2. The pipe joint with an opening / closing mechanism according to claim 1, wherein a stopper for preventing the inner collar from coming off is provided in the female screw portion of the socket. 3. The pipe joint with an opening and closing mechanism according to claim 1, further comprising means for fixing one end of a hose to a rear end side of the inner collar. 4. A pipe joint comprising a socket having a lumen through which a fluid passes, and an inner collar screwed into the lumen, wherein a means for fixing one end of a hose is provided on an outer periphery of the socket. Along with the inner cavity portion, a small-diameter cavity portion and a large-diameter cavity portion following the small-diameter cavity portion are formed from the distal end side, and further a female screw portion to be screwed with the inner collar is formed. A cavity comprising a small-diameter portion and a large-diameter portion which fit into the small-diameter cavity portion and the large-diameter cavity portion, and a male thread portion screwed with the female thread portion, wherein the front end side has a bottom and the rear end side is released. And a small-diameter portion formed with a perforated portion connected thereto, an O-ring for sealing is attached to the outer peripheral surface of the small-diameter portion and the large-diameter portion with the perforated portion interposed therebetween, and the hollow portion is a hose. And a O-relief that functions as a seal in contact with the outer surface of the hose. The cavity portion has a built-in grab ring in which the claw faces the tip side, and a press ring for pressing the claw portion of the grab ring from the rear side, and the inner collar contacts the outer peripheral side of the press ring. A pipe joint with an opening and closing mechanism, comprising an outer collar with an inner taper.