JPH081354Y2 - Piping terminal connection structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial application field and outline of the invention] The present invention relates to a pipe terminal connection structure for connecting a pipe terminal portion to a connected body such as a gas cock, and a connected body for inserting and connecting a pipe. The pipe connecting work can be performed only by rotating the rotary cylinder attached to the side cylinder portion, whereby the pipe connecting work can be easily performed.

[Prior Art and Problem] In a kitchen or the like, a gas cock is often attached to a wall surface. Recently, many gypsum boards have been used to simplify the structure of the wall surface.

It is difficult to adopt conventional steel pipes for such wall surfaces,
Recently, a flexible metal bellows tube has been adopted as a gas tube.

This bellows tube expands the outer peripheral wall of a thin metal tube at regular intervals to make the axial section of the tube wall corrugated,
The outer diameter of the peak portion forming the corrugation is set to be constant.

As such a configuration, specifically, one as shown in FIG. 7 is known.

In this conventional one, a flange (12) extended from a gas inlet (11) of a gas cock as a main body (1) to be connected and a backing plate (40) attached to the back surface of the wall plate (30) are bolted. The gas cock body is fixed to the wall plate (30) by screwing it with (5) and (5), and the metal bellows tube (2) having flexibility is connected to the gas cock body through the joint (20). Are connected.

The joint (20) is mainly composed of a joint (22), a cylinder screw (23),
A pair of retainers (6), (6) and rubber packing (P)
The inner surfaces of the retainers (6) and (6) are formed in a corrugated shape that matches the outer surface of the bellows tube (2).

In this structure, the outer surface of the bellows tube (2) is held by the retainers (6) and (6), and the bellows tube (2) in this state is attached to the tubular portion (25) of the joint main body (22). Inserting and then tightening the tube screw (23) screwed into the tube portion (25) completes the work of connecting the bellows tube (2). And in this conventional one, the bellows tube (2) in the connected state
Since the retainers (6), (6) are fitted onto the entire outer periphery thereof and are inserted and fixed in the tubular portion (25), the bellows tube (2) can be firmly fixed.

However, in this conventional one, prior to the work of tightening the tubular screw (23), the work of inserting the bellows pipe (2) into the tubular screw (23) and the tip of the bellows pipe (2) in the inserted state are inserted. It is necessary to insert the retainers (6) and (6) into the tubular portion (25) of the joint main body (22) while the retainers (6) and (6) are externally fitted, and the work before tightening the tubular screws (23) is required. There was a problem that the connection work would be troublesome.

The present invention has been made in view of the above points, and "the main body (22) of the joint (22) and the bellows pipe (2) inserted therein are in a state of engaging and retaining, and both It is an object of the present invention to make it possible to simply perform the work of connecting the bellows pipe (2) in the connection structure for connecting the pipe terminals.

[Technical Means] The technical means of the present invention for solving the above problems are as follows.
"A rotating tube (7) which is inserted into the tubular portion (25) in a state where it does not come off and has an inner diameter larger than the outer diameter of the bellows tube (2),
An opening formed through the side wall of the rotating cylinder (7), a mover penetrating the inside and outside of the side wall of the rotating cylinder (7) and housed and held in the opening, and a cylinder (25). A cam projection formed on the inner surface of the cam and arranged so as to be located in a part of a region facing the movement trajectory of the moving element held by the rotating cylinder (7);
When the rotating cylinder (7) is rotated, the mover is pushed inward by the cam convex portion so that it is engaged with the outer peripheral concave-convex portion of the bellows tube (2). "

[Operation] The above technical means operates as follows.

In the initial state in which the bellows pipe (2) is not connected to the tubular portion (25), the mover housed and held in the opening of the rotating tubular (7) moves from the cam convex portion on the inner surface of the tubular portion (25). Make sure that it is located off.

In this state, when the tip end of the bellows tube (2) is inserted into the rotary cylinder (7) and the rotary cylinder (7) is rotated, the rotary cylinder (7) is rotated.
The mover accommodated and held in the opening formed in the side wall of the movable body moves as the rotating cylinder (7) rotates. Then
The moving moving element faces a part of its moving range and is mounted on a cam convex portion formed on the inner surface of the tubular portion (25), and is pushed out to the inner surface side of the rotating barrel (7), and is pushed out. The mover will engage with the irregularities on the outer periphery of the bellows tube (2).

As a result, the bellows tube (2) is connected to the tubular portion (25) of the joint main body (22) in a retaining state.

[Effects] The present invention has the following specific effects.

The connecting work of the bellows tube (2) is completed simply by inserting the end of the bellows tube (2) into the tubular part (25) and turning the turning tube (7). ) Connection work can be done easily.

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

As shown in FIG. 1, on the inner surface of the tubular portion (25) provided on the joint main body (22), four concave grooves (44), (44) extending in the axial direction are arranged at 90 ° intervals. The cam convex portions (42) and (42) described in the above-mentioned technical means are provided at the portions located between the concave grooves (44) and (44).

Further, as shown in FIG. 2, an annular groove (45) is formed on the inner peripheral wall of the cylindrical portion (25) so as to connect the respective tip portions of the concave grooves (44) and (44). In addition, a small diameter portion (46) is formed further inside the portion where the annular groove (45) is provided. The inner surface of the small diameter portion (46) is a tapered surface that contracts in diameter toward the back of the tubular portion (25). or,
An expanded space (47) for accommodating the rubber packing (P) is formed further inside the small diameter portion (46). Further, a screw hole (28) is formed in the side wall portion at the tip of the tubular portion (25), and the stopper ball (27), the leaf spring (26), and the holding screw (28) are provided in the screw hole (28). 24) are to be installed in this order.

On the other hand, the side wall of the rotary cylinder (7) to be inserted into the cylinder part (25) of the joint main body (22) has openings (7
1) and (71) are formed, and the openings (71) and (7) are formed.
Rollers (73) and (73), which have corrugated surfaces matching the outer surface of the bellows tube (2), are rotatably accommodated and held in 1).

As shown in FIG. 3, a projecting body (75) biased in a projecting direction by a spring (74) is housed in both end faces of the roller (73), and a tip portion of the projecting body (75) is housed. Is pressed against the rotary cylinder (7).

Further, recesses (76), (76) are formed at 90 ° intervals on the outer peripheral portion of the tip of the rotating cylinder (7), and the recesses (76), (7) are formed.
Lock balls (77) and (77) are housed in 6) with their heads exposed. Further, a flange (72) is provided at an end of the rotating cylinder (7) on the opposite side of the lock balls (77) and (77), and a rotation in the vicinity of the flange (72) is made. A guide groove (78) is provided around the outer surface of the moving cylinder (7), and four recesses (79) are arranged at 90 ° intervals on the guide groove (78).

To assemble the above fittings, use the fitting main body (22)
5) Rubber packing (P) in the enlarged space (47) formed inside
And the metal seal ring (53) is loaded in the small diameter portion (46).

Next, the rollers (73), (73) and the lock balls (77), (77) are attached to the rotating cylinder (7), and the rollers (73) and the lock balls (77) are attached to the cylindrical portion (25). The rotary cylinder (7) is inserted into the cylindrical part (25) so as to pass through the concave grooves (44) and (44) on the inner surface, and in this state, the cylindrical part (2) is inserted.
The stopper ball (27) and the leaf spring (26) are loaded into the screw hole (28) formed in the side wall of the tip end of (5), and further, the cap screw (24) is screwed in subsequently.

Then, the stopper ball (27) is
It is fitted into the guide groove (78) formed on the outer periphery of the rotating cylinder (7) by the pressing force of 6). Thereby, the joint is assembled.

Now, when connecting the bellows pipe (2) using the joint in the assembled state, as shown in FIG.
The bellows tube (2) is inserted into the tube section (25) from the end of the rotary tube (7), and the tip of the bellows tube (2) is rubber-packed (P).
Press in.

In this state, as shown in FIG. 2 and FIG. 4, the rollers (73) and (73) mounted on the rotating cylinder (7) have the cylindrical part (25).
It is in a state of being fitted in the concave grooves (44) and (44) formed in the above. When the rotating cylinder (7) is rotated in this state,
As shown in FIG. 5, the rollers (73) and (73) escape from the concave grooves (44) and (44), and between the concave grooves (44) and (44), that is, the cam convex portion. Roller (7) to (42)
3) and (73) get on. Then, the rollers (73), (7
As shown in FIG. 6, the lock ball (77) engaged with the outer peripheral uneven surface of the bellows tube (2) and the lock ball (77) held at the tip of the rotating tube (7) has a cylindrical section (25). ) Engages with the peripheral edge of the annular groove (45) formed in the inside of the bracket), whereby the bellows tube (2) is connected in a retaining state. Further, in this connection state, as shown in FIG. 6, the screw hole (28) at the tip of the tubular portion (25) is provided.
The stopper ball (27) loaded in the above is fitted into the recess (79) from the guide groove (78) by the urging force of the leaf spring (26), whereby the rotating cylinder (7) does not rotate easily. It becomes a state.

Next, when removing the above-mentioned connected bellows tube (2),
It suffices to rotate the rotating cylinder (7) from the above connected state.

When the rotating cylinder (7) is rotated by 45 °, the rollers (73),
(73) is a groove (44) formed on the inner surface of the tubular portion (25),
Move to the position corresponding to the (44) part, and
The movement of 3) and (73) to the tubular part (25) side is allowed.

Then, the protrusions (7
Since 5) is pressed against the inclined surface (70) corresponding thereto by the spring (74), the roller (73) fits into the concave groove (44) of the tubular portion (25), It returns to the initial state shown in FIG. After that, if the bellows tube (2) is pulled out, the work of removing the bellows tube (2) is completed.

As described above, according to the above, the connection and disconnection of the bellows tube (2) can be performed only by rotating the rotating cylinder (7).

In addition, a pipe such as another bellows pipe may be connected to the joint main body (22) on the side opposite to the connection side of the bellows pipe (2).
The joint body (22) may be constituted by a gas pipe connecting cylinder that integrally projects from the gas cock. When the gas pipe connecting cylinder constitutes the joint main body (22) as it is, the gas cock pipe installation work can be easily performed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention, FIG. 2 is a sectional view of a roller (73) portion in a state where the bellows tube is not connected, and FIG. 3 is an enlarged sectional view of an essential part of a roller (73) mounting portion. , Fig. 4 is a cross-sectional view of the state where the bellows tube is not connected, Fig. 5 and Fig. 6 are cross-sectional views of the state where the bellows tube is connected, and Fig. 7 is an explanatory view of a conventional example. Bellows tube (7) …… Rotating cylinder (22) …… Main joint (25) …… Cylinder (42) …… Cam convex

Claims (1)

[Scope of utility model registration request] 1. A pipe terminal connection structure in which a tubular portion (25) of a joint main body (22) and a bellows pipe (2) inserted therein are engaged and retained to connect them. A rotation tube (7) which is inserted into the tube portion (25) in a state of being prevented from coming off and has an inner diameter larger than the outer diameter of the bellows tube (2), and which penetrates the side wall of the rotation tube (7). Opening and the rotating cylinder (7)
Area that penetrates the side wall of the movable body inside and outside and is housed and held in the opening, and a region formed on the inner surface of the cylindrical portion (25) and facing the movement trajectory of the movable body held by the rotating cylinder (7). Is provided so as to be located at a part of the movable body, and when the rotating cylinder (7) is operated to rotate, the mover is pushed inward by the cam protruding portion, and this moves into the bellows tube ( A pipe terminal connection structure adapted to engage with the outer peripheral irregularity portion of 2).