JPH0710157Y2 - Flexible pipe fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field and Outline of the Invention] The present invention relates to a flexible pipe joint used at the time of piping work using a bellows-shaped flexible pipe. The flexible tube is made so as not to be easily damaged.

[Prior Art and Problem] As a gas pipe buried in a wall surface of a house, a flexible bellows-shaped flexible tube which is freely bendable and has good workability is adopted, and a flexible tube for connecting the flexible tube is used. The pipe joint has already been applied 1-
I proposed the No. 141283.

As shown in FIGS. 7 and 8, a female screw (10) is engraved on the inner peripheral surface of one end of the main body cylinder (1).
Adjacent to the rear of the middle diameter part (11) and the small diameter part (12) following it
Are formed.

In the intermediate diameter portion (11) in the main body cylinder (1),
A lock mechanism (3) consisting of split rings (30) and (30) made of an elastic material and an auxiliary ring (31) interposed therebetween is loaded, and the auxiliary ring (31) has a lock mechanism (3). Inner circumferences of both ends are tapered surfaces (32), (32).
Also, a small diameter portion (12) formed at the back of the intermediate diameter portion (11).
A metal packing (20) is loaded in the space, and a rubber packing (21) is fitted and disposed in an enlarged space (13) formed further in the small diameter portion (12). Further, a cylinder screw (4) for pushing the lock mechanism (3) into the inner side of the body cylinder (1) is screwed into the female screw (10) formed at the tip of the body cylinder (1). ing.

In this case, before the flexible tube (A) is connected and fixed, the inside of the joint is in the state shown in FIG. 9, and the flexible tube (A) is placed inside the split rings (30) and (30). ) Is in the loose insertion state.

In this state, the tube screw (4) screwed into the end of the body tube (1)
When it is tightened, the taper surface (42) formed on the inner circumference of the tip of the cylinder screw (4) and the portion changing from the intermediate diameter portion (11) of the main body cylinder (1) to the small diameter portion (12) are formed. The distance between the tapered surfaces (15) becomes narrower, and these tapered surfaces (15),
The lock mechanism (3) interposed between the (42) and the flexible tube (A)
Locking operation is performed to lock the

That is, the split ring (30) located between the taper surface (42) of the distal end of the cylindrical screw (4) and the taper surface (32) of the auxiliary ring (31) facing the tip screw has the taper surfaces (42), ( 3
It is clamped in 2) and deforms so as to contract the diameter. Similarly, the other split ring (30) is also deformed so as to contract in diameter.

Then, due to the contraction deformation of the split rings (30) and (30), these are formed on the outer periphery of the flexible tube (A) (valley portion (A).
1), (A1) (the valleys are not connected in a spiral shape but closed in a circular shape), and the flexible tube (A) is pulled out to the main body tube (1). It will be connected to the stopped state.

In this case, the flexible tube (A) can be coupled in a retaining state only by inserting the distal end portion of the flexible tube (A) into the joint and tightening the tubular screw (4), which simplifies the pipe connection work. There is an advantage that can be done.

However, in the above-mentioned prior art, the cylindrical screw (4)
When the split ring (30) is contracted by diametrically contracting, the split ring (30) may break the peripheral side wall of the flexible tube (A) and damage it.

To further elaborate on the above problems, the split ring (30)
Since the vicinity of the peripheral notch (36) has the lowest strength, when the tubular screw (4) is tightened to contract the diameter of the split ring (30), the split ring (30) is entirely Do not make regular deformations while maintaining a circular shape. That is, the cutout portion having a low strength in the split ring (30) is deformed so as to fall on the flexible tube (A) side prior to other portions. Then, as shown in FIG. 10, the end portions (35) and (35) of the wire (37) that constitutes the split ring have corner portions (39) and (39) on the side of the flexible tube (A). It pierces the side wall of the thin flexible tube and is broken.

The present invention has been made in view of the above-mentioned point, and is "a cylinder screw (4) screwed into an end of a main body cylinder (1), and is located coaxially with the cylinder screw (4). The split ring (30) mounted deeper than the tubular screw (4) faces the split ring (30) from the side opposite to the tubular screw (4) side and the split ring (30) side. A pinching member having a pair of taper surfaces whose diameters increase toward is provided, and the split ring (30) is pinched by the taper surfaces of the pair of pinching members by screwing and tightening the cylindrical screw (4). Flexible tube inserted inside (A)
In a flexible pipe joint whose diameter contracts toward the end of the flexible pipe (A), the problem is to reduce the damage of the flexible pipe (A) coupled to the joint.

[Means] The technical means of the present invention for solving the above-mentioned problem is that "the both ends of the strand of the split ring (30) facing each other across the notch (36) are placed at the center of the split ring (30). It was tilted so that it spreads toward. "

[Operation] The above technical means operates as follows.

Since the pair of end surfaces of the wire constituting the split ring (30) are inclined so as to spread toward the center of the split ring (30), the split ring (30) is tightened by the tubular screw (4). ) Is deformed so that the end portion of the strand of wire falls before the other portion and falls toward the flexible tube (A), the pair of slanted end faces of the strand of wire (A) are deformed. ) Is deformed so as to approach the surface parallel to. Therefore, as compared with the above-described prior art, it is possible to avoid that the corner of the end of the wire on the flexible tube (A) side pierces the wall surface of the flexible tube (A).

[Effect] The present invention has the following unique effects.

When the tube screw (4) is tightened, the end of the wire constituting the split ring (30) does not pierce the surface of the flexible tube (A), so the flexible tube (A) during pipe connection work Can prevent damage.

[Embodiment] Next, an embodiment of the present invention described above will be described with reference to the drawings.

As shown in FIG. 1 to FIG. 3, a tube screw (4) is screwed into the inner circumference of the upstream end of the gas inlet (16) of the main body tube (1) as in the conventional case described above. Further, a seal cylinder (6) made of brass is screwed into the upstream end of the cylinder screw (4). Further, the downstream end of the seal cylinder (6) abuts on a tapered surface (63) formed on the inner periphery of the cylinder screw (4) near the downstream end and contracting toward the downstream side.

A female screw (1) engraved on the inner circumference of the upstream end of the main body cylinder (1)
In the intermediate diameter portion (11) formed in the portion adjacent to the downstream side of (0), the split ring (3
0), (30) and an auxiliary ring (3
A locking mechanism (3) consisting of (1) and is loaded.

The split rings (30), (30) are formed on both end faces of the split ring (30) interposed between them, the tip end face of the barrel screw (4) and a part of the main barrel (1). In addition, the taper surfaces (32), (32), (42), and (15) are sandwiched between the taper surfaces (32), (32), (42), and (15). , A part of the auxiliary ring (31) and the tubular screw (4) constitute a pinching member for pinching the split ring (30).

Next, the split ring (30) is configured as shown in FIG. 4, and the end faces (38) and (38) of the wire (37) that constitutes the split ring (30) are the split rings. It is inclined so that it expands toward the center of (30). The split ring (30) of this embodiment is made of an elastic material, and the split ring (30) in the free state is formed so that its inner diameter is larger than the maximum outer diameter of the flexible tube (A). It is

From the disassembled state shown in FIG. 3, the rubber packing (21), the metal packing (20), ... Are sequentially loaded into the main body cylinder (1), and then the cylinder screw (4) is screwed into the main body cylinder (1). Then, when the seal tube (6) is screwed into the tube screw (4), the flexible pipe joint of the embodiment of the present invention is assembled. In this state, the tip of the flexible tube (A) is inserted into the main body tube (1) through the seal tube (6) and the tube screw (4), and the tip of the flexible tube (A) is enlarged. Rubber packing (2
When pressed into 1), the state shown in Fig. 1 is obtained.

When the cylinder screw (4) is tightened in this state, the taper surface (42) formed at the tip of the cylinder screw (4) and the intermediate diameter portion of the main body cylinder (1) are tightened as in the conventional case. The tapered surface (15) formed at the boundary between the (11) and the small diameter portion (12) comes close to each other, whereby the split rings (30), (30) are positioned between the auxiliary rings (31). ) And the taper surfaces (32), (3) formed on the cylinder screw (4) and the main body cylinder (1).
2), (42), (15) pinch to contract the diameter.

Now, with the tightening of the tube screw (4), the split ring (3
Although the diameter of 0) and (30) is contracted, the split ring (3
(0) performs an irregular deformation motion that does not maintain a circle,
In particular, when both ends of the wire (37) constituting the split ring (30) are deformed so as to drop toward the flexible tube (A) side prior to other portions, as shown in FIG. The end surfaces (38), (38) of the wire (37) are deformed so as to approach the outer peripheral surface of the flexible tube (A) in parallel. Thereby, the end face (38),
The flexible tube (A) does not come into contact with the flexible tube (A) locally and stick into the flexible tube (A) as in the case of the prior art described above. The damage of (A) can be prevented.

After that, when the flexible tube (A) screwed into the tube screw (4) is tightened, as shown in FIG. 2, the tip of the seal tube (6) taps the taper of the tube screw (4). The surface (63) is pressed and deformed to be in close contact with the peripheral surface of the flexible tube (A) and to be in a state of being metal-sealed.

In the second embodiment shown in FIG. 6, the tip of the cylindrical screw (4) is cut by a certain length and the pressing ring (45) including the tapered surface (42) is made independent.

In this case, when the cylinder screw (4) is screwed into the main body cylinder (1) and tightened, the pressing ring (45) is less likely to rotate following the cylinder screw (4), so that the pressing ring (45). The split ring (30) pressed by the rotation of the tubular screw (4) is also less likely to rotate. As a result, it is possible to prevent the peripheral edge of the split ring (30) from rotating in pressure contact with the outer circumference of the flexible tube (A), and from this point also the outer wall of the thin flexible tube (A) is damaged. Worry less.

In the second embodiment, a combination of the pressing ring (45) and the auxiliary ring (31) for sandwiching one split ring (30) and an auxiliary ring (for sandwiching the other split ring (30) ( A combination of 31) and a part of the main body cylinder (1) constitutes a pinching member of the split ring (30).

It should be noted that another flexible tube (A) or a steel tube may be connected to the side opposite to the connecting side of the flexible tube (A) in the main body tube (1).
A gas pipe connection cylinder that integrally projects from the gas cock may be the main body cylinder (1). When the gas pipe connecting cylinder is the main cylinder (1), the gas cock pipe installation work can be easily performed.

[Brief description of drawings]

FIG. 1 is a sectional view of a flexible pipe joint of the first embodiment, FIG. 2 is an enlarged sectional view of an essential part in a state where a tube screw (4) is tightened, FIG. 3 is an exploded perspective view, and FIG. FIG. 5 is a front view of the split ring (30) used in the embodiment of the invention, and FIG.
FIG. 6 is a sectional view of an essential part of the second embodiment, and FIGS. 7 to 10 are explanatory views of the prior art. In the figure, (1) ... Main body tube (4) ... Tube screw (30) …… Split ring (36) …… Notch (A) …… Flexible tube

Claims (1)

[Scope of utility model registration request] 1. A cylinder screw (4) screwed into an end portion of a main body cylinder (1), and a cylinder screw (4) located coaxially with the cylinder screw (4) and mounted deeper than the cylinder screw (4). A split ring (30) and a pair of tapered surfaces facing each other in such a manner as to sandwich the split ring (30) from the side of the cylindrical screw (4) and the opposite side thereof and whose diameter increases toward the split ring (30) side. A flexible tube (A) in which a clamping member is provided, and a split ring (30) clamped by the tapered surfaces of the pair of clamping members by screwing and tightening a cylindrical screw (4) is inserted inside thereof. In a flexible pipe joint that contracts in diameter toward, the end faces of the split ring (30) strands that face each other across the cutout (36) are centered on the split ring (30). A flexible pipe joint that is inclined so as to expand toward it.