JPH0689873B2 - Flexible tube fittings - Google Patents

Description

TECHNICAL FIELD The present invention relates to a joint for connecting a connected main body such as a gas cock to a pipe terminal made of a flexible pipe, and particularly for tightening the joint. By adopting the engagement mechanism in the tubular body, the connection work between the joint and the end of the flexible tube is simplified.

[Prior Art and Problems Thereof] In kitchens and the like, a gas cock is often attached to a wall surface. Recently, a large number of gypsum boards have been used to simplify the structure of the wall surface.

It is difficult to adopt a conventional steel pipe for such a wall surface, and recently, a bellows pipe, that is, a bendable flexible pipe is adopted as a gas pipe. This flexible tube expands the tube wall at regular intervals to make the axial section of the tube wall corrugated,
The outer diameters of the large diameter portions (26) and (26) are set to be constant. In this case, since the flexible tube itself has no rigidity, the gas cock is fixed to the gypsum board and the flexible tube is connected to this.

As such a configuration, specifically, a configuration as shown in FIG. 6 is known.

As shown in the same figure, this conventional one is attached to the back surface of the wall plate (30) and the flange (12) which is extended from the gas inlet (11) of the gas cock body as the main body (1) to be connected. The gas cock body is fixed to the wall plate (30) by screwing the backing plate (40) with the bolts (5) and (5), and the flexible pipe (2) is fixed to the gas cock body through the joint (20). ) Is connected.

The joint (20) includes a tubular main body (22) and a nut (2).
3), consisting of a pair of spacers (S), (S) and packing (P), and the cross section of the spacers (S), (S) in the axial direction is the axial direction of the pipe wall of the flexible tube (2). The spacers (S) and (S) are fitted to the flexible tube (2) so as to face each other in the cross section, and these are inserted into the tubular portion (25) of the main body portion (22) together with the packing (P). To use.

In this conventional type, the peripheral edge of the opening (30a) of the wall plate (30) covers a wide range over the flange (12) and the backing plate (4).
The gas cock body is securely fixed to the wall plate (30) because it is sandwiched by (0), and further, by the joint (20),
The gas cock body in the fixed state and the flexible tube (2) are connected.

However, this conventional device has a problem that the connection between the flexible tube (2) and the joint (20) is troublesome.

That is, in the above conventional one, when the joint (20) is attached to the flexible tube (2), the spacer (S),
This is because the main body portion (22) and the nut (23) must be screwed together with (S) and the packing (P) set in advance. In the work of mounting the gas cock in which the flexible tube (2) is pulled out from the wall plate (30), the work is particularly troublesome, and the spacers (S) and (S) are attached to the wall plate (30). If it is lost inside, a situation occurs in which the joint (20) cannot be connected.

[Technical problem] The present invention is directed to such a "large diameter portion (26), (26) of the pipe wall.
Is a joint for a flexible tube in which the ends of the flexible tube (2), which are continuous in the axial direction at regular intervals, are connected to the tubular portion (25).
In order to improve the workability of connecting the flexible tube (2) and the joint (20), the end of the flexible tube (2) is directly inserted into the flexible tube connecting portion to form the flexible tube (2). The technical problem is to be able to connect to the main body portion (22) in an airtight peripheral state.

[Technical Means] The technical means of the present invention taken to solve the above technical problem is "a movable tube (3) housed in a tube part (25) and having a flexible tube (2) inserted therein. ), And a plurality of balls (B), (B) held by the wall portion of the movable cylinder (3) so as to be retractable in the radial direction, and the movable cylinder (25) screwed into the movable cylinder (25). Tightening tube (4) that allows 3) to enter integrally in the same direction
And a pushing means for pushing the balls (B) and (B) inward by tightening the tightening cylinder (4) ".

[Operation] The above technical means of the present invention operates as follows.

When the end of the flexible tube (2) is inserted into the movable tube (3) housed in the tube portion (25) of the joint (20) and the insertion position is set to a predetermined value, the outer circumference of the flexible tube (2) is The valley is the movable cylinder (3)
And the balls (B) and (B) held by.

In this state, when the tightening cylinder (4) is tightened, the balls (B), (B) are pushed inward by the action of the pushing means and the movable cylinder (3) is made to enter in the same direction,
As a result, the balls (B) and (B) are engaged with the large diameter portion (26) of the flexible tube (2) and the flexible tube is pushed in the screwing direction of the tightening tube (4).

As a result, the tip of the flexible tube (2) is brought into contact with the sealing means arranged at the downstream end of the tubular portion (25) and is connected in an airtight state. Then, in this state, the flexible tube (2) is coupled to the tubular portion (25) in a retaining state.

[Effects] The present invention having the above-described configuration has the following unique effects.

Simply insert the flexible tube (2) into the movable tube (3) and screw the tightening tube (4) into the flexible tube (2) and the tube section (25).
And (2) are connected to each other in an airtight state on the outer periphery, and the two are connected to each other in a retaining state, so that the joint (20) of the flexible tube (2) is
To be easily installed.

Further, since the balls (B) and (B) having the same function as the spacer (S) of the conventional example are held in the movable barrel (3), there is no inconvenience of losing them.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

In the first embodiment shown in FIGS. 1 to 3, the joint (20) is provided with a male screw portion (28) for connection on one side and a tubular portion (25) on the other side. A tapered surface (27) is formed on the inner peripheral surface of the portion (25) as a pushing means, and the movable cylinder (3) and the tightening cylinder (4) described above are integrated to form a cylindrical tightening screw (34). The female screw portion is formed on the open end side of the tapered surface (27) of the tubular portion (25), and the tightening screw (34) is screwed into the female screw portion.

This first embodiment corresponds to the second embodiment,
A tip tube portion (35) is formed on the tip side in the screwing direction, and in the through holes (H), (H) formed in the tip tube portion (35),
A ball (B) having a diameter larger than the wall thickness of the through hole forming portion,
(B) is housed so as to be retractable in the radial direction. Further, the inner diameter of the tightening screw (34) is adapted to the outer shape of the flexible tube (2), and the flexible tube (2) can be inserted into the tightening screw (34) with a slight gap. ing.

In this first embodiment, the tip of the flexible tube (2) is inserted into the tightening screw (34) with the tightening screw (34) pulled out as shown in FIGS. Screw in the tightening screw (34) as shown in Fig. 3. Then the ball (B),
When (B) coincides with the taper surface (27), these balls (B), (B) are pushed inward in the radial direction, and the balls (B), (B) become larger than the flexible tube (2). Engage with the diameter.
Thereafter, when the tightening screw (34) is further screwed in, the balls (B), (B) and the large diameter portion (26) of the flexible tube (2) remain engaged, and The tip portion is pushed inward of the tubular portion (25) and pressed against the packing (P) formed at the downstream end portion of the tubular portion (25). As a result, as shown in the same figure, the flexible tube (2) is retained in the tubular portion (25) in a state where it does not come off, and at the same time, the seal of the contact surface with the tip portion is secured. Here, when screwing the tightening screw (34),
Flange (3) formed on the outer end of the tightening screw (34)
6) is the tool corresponding part.

Next, in the second embodiment shown in FIG. 4 and FIG. 5, the movable tube (3) into which the flexible tube (2) is inserted in the tube portion (25), and the externally fitted and axial direction thereof. In the above, the tightening cylinder (4) is housed so as to be relatively movable within a certain range. In order to limit the range of relative movement between the movable cylinder (3) and the tightening cylinder (4) to a certain range, in this embodiment, the flange portions (31) and (32) are extended at both ends of the movable cylinder (3). The interval between these collars is set to be a certain length longer than the entire length of the tightening cylinder (4). A plurality of balls (B), (B) are held within the wall thickness of the movable cylinder (3) at a predetermined position.

In the case of this embodiment, the tightening cylinder (4) has a cylindrical portion (25).
It is configured to be screwed into a screw portion formed on the inner peripheral surface of the flexible tube (2) is inserted into the movable tube (3) as in the first embodiment, and the tightening tube (4) is inserted. When the screw is screwed in, the tips of the balls (B), the protrusions of which protrude toward the outer peripheral side of the wall of the movable tube (3), are pushed inward, and the balls (B), (B) become flexible tubes. It will be engaged with the mountain portion on the outer periphery of (2). After that, when the tightening cylinder (4) is further screwed in, the tip of the tightening cylinder (4) contacts the flange portion (31) and the movable cylinder (3) is pushed in. As a result, as shown in FIG. The flexible tube (2) is brought into pressure contact with the packing (P) provided at the downstream end of the tubular portion (25).

In the case of the second embodiment, since the slit (37) is formed over a certain range from the outer end of the movable barrel (3), and the protrusion degree of the collar (31) is small, the movable cylinder (3) is movable. When the tube (3) and the tightening tube (4) are fitted together, the diameter of the end of the movable tube (3) is forcibly reduced and the tightening tube (4) is externally fitted so that it does not come off. Can be installed. Therefore, the movable cylinder (3) and the tightening cylinder (4) can be easily assembled.

In each of the above-mentioned examples, the ball (B),
As the holding structure of (B), a through hole that penetrates in the radial direction is formed in the wall portion of the wall surface of the movable cylinder, and the balls are individually inserted into the through holes (H). In order not to escape inside the
The diameter of the inner peripheral side of the movable cylinder is set smaller than the diameter of the ball (B).

In the second embodiment, the balls (B), (B)
Are arranged in a zigzag pattern, and the intervals of these balls in the axial direction in the movable cylinder are set to the large diameter portions (26), (26) of the flexible tube (2).
Since the intervals are matched with each other, the balls are engaged at two points in the axial direction of the flexible tube, and the tightening fixing force is distributed over a wide range of the flexible tube. It is possible to prevent the inconvenience of intensively acting on. Further, since the flexible tube is engaged at two positions in the axial direction, the ball and the large diameter portion (26) are easily engaged even if the initial position of the movable cylinder is displaced.

[Brief description of drawings]

FIG. 1 is a sectional view of the first embodiment of the present invention, FIG. 2 is an explanatory view of a flexible tube being connected, and FIG. 3 is an explanatory view of a flexible tube connected state,
FIGS. 4 and 5 are explanatory views of the second embodiment, and FIG. 6 is an explanatory view of the conventional example, in which (2) ... flexible tube (20) ... joint, (25) ... Cylindrical part (3) …… Movable tube, (4) …… Tightening tube (34) …… Tightening screw (27) …… Tapered surface (B), (B) …… Ball

Claims (4)

[Claims] 1. An end of a flexible tube (2) in which large-diameter portions (26), (26) of a tube wall are uniformly continuous in the axial direction at regular intervals is connected to a tubular section (25). In the flexible tube joint, a movable tube (3) housed in the tube portion (25) and into which the flexible tube (2) is inserted, and a wall surface of the movable tube (3) can project and retract in the radial direction. A plurality of balls (B) held by,
(B), a tightening tube (4) that is screwed into the tube portion (25) and allows the movable tube (3) to integrally enter in the same direction, and the ball is obtained by tightening the tightening tube (4). (B),
A joint for a flexible tube, comprising: (B) a pushing means for pushing inward. 2. The pushing means is a tapered surface (27) formed on the inner peripheral surface of the tubular portion (25) and contracting in the direction of entry of the movable tubular member (3), and the tightening tubular member (4) is screwed. The flexible pipe joint according to claim 1, wherein the movable cylinder (3) and the tightening cylinder (4) are engaged with each other so as to move integrally during tightening. 3. The flexible tube joint according to claim 2, wherein the movable cylinder (3) and the tightening cylinder (4) are integrally connected. 4. A press-fitting means comprising: a tip of a tightening cylinder (4) which is in contact with the tops of the balls (B) and (B) protruding from the outer periphery of the movable cylinder (3). Flexible pipe joint.