JPS63308293A - Joint for flexible pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application and Summary of the Invention The present invention relates to a joint for connecting a main body to be connected, such as a gas cock, to a piping terminal made of a flexible pipe. By employing an engagement mechanism in the cylindrical body, it is possible to simplify the connection work between the joint and the end of the flexible tube.

[Prior art and its problems] In kitchens, gas cocks are often mounted on walls. Recently, gypsum board has been widely used to solidify the wall structure.

It is difficult to use conventional steel pipe piping for such walls, and recently, bellows pipes, that is, flexible pipes that can be bent, have been used as gas pipes. In this flexible tube, the tube wall is expanded at regular intervals so that the tube wall has a wave-shaped cross section in the axial direction, and the outer diameters of the large diameter portions (26) and (25) are set constant. In this case, since the flexible tube itself does not have rigidity, a configuration is adopted in which the gas cock is fixed to a gypsum board and the flexible tube is connected to this.

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

As shown in the figure, this conventional system
) The flange (12) protruding from the gas inlet (11) of the gas cock body and the backing plate (40) attached to the back of the wall plate (3o) are screwed together with bolts (5) and (5). By attaching the gas cock body to the wall plate (
30), and a flexible tube (2) is connected to this gas cock body via a joint (20).

The joint (20) includes a cylindrical main body (22), a nut (
23), consisting of a pair of spacers (S), (S) and packing (P), the spacers (S), (
The axial cross section of S) is made to match the axial cross section of the tube wall of the flexible tube (2), and the spacers (S), (S)
are fitted onto the flexible tube (2) in a facing state, and these are inserted into the cylindrical part (25) of the main body part (22) together with the packing CP).

In this conventional one, the opening (30a) of the wall plate (30)
Since the peripheral edge of the gas cock is held between the flange (12) and the backing plate (40) over a wide range, the gas cock body is securely fixed to the wall plate (30), and the joint (20)
, the fixed gas cock body and the flexible tube (2
) will be connected.

However, in this conventional method, the flexible tube (2) and the joint (
There was a problem that connection with 20) was troublesome.

That is, in the above-mentioned conventional type, the flexible tube (2) is provided with a joint (
20) When trying to install the spacer (S),
This is because the main body (22) and the nut (23) must be screwed together with the (S) and packing (P) set in advance. In the gas cock installation work, which is performed with the flexible tube (2) pulled out from the wall plate (30), the work becomes particularly troublesome, and the spacer (S),
(S) is lost in the wall plate (3o), the joint (
20) may become impossible to connect.

[Technical Problem] The present invention solves the problem of large diameter portions (26) and (2) of the r-tube wall.
6) are uniformly continuous in the axial direction at regular intervals (2
) in which the end of the flexible pipe is connected to the cylindrical part (25), in order to improve the workability of connecting the flexible pipe (2) and the joint (20), a flexible pipe is attached to the flexible pipe connection part. Flexible tube (2)
Insert the end of the flexible tube (2) into the main body (2).
2) The technical problem is to be able to connect the outer periphery in an airtight state.

[Technical Means] The technical means of the present invention taken to solve the above technical problem is a movable tube (3) which is housed in the r-tube section (25) and into which the flexible tube (2) is inserted. ), a plurality of balls (B), (B) held on the wall crest of this movable cylinder (3) so as to be freely protrusive and retractable in the radial direction, and screwed into the cylinder part (25) and the movable cylinder ( 3), the tube (4) is tightened to integrally penetrate the balls (B) and CB in the same direction, and a pushing means is used to push the balls (B) and CB) inward by tightening the tube (4). This is one thing we have prepared.

[Effect] 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 cylindrical portion (25) of the joint (20) and its insertion position is set to a predetermined position, the outer periphery of the flexible tube (2) The valley of the movable tube (
3) Matches the ball held in (B) and (B).

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

As a result, the tip of the flexible tube (2) comes into contact with the sealing means provided at the downstream end of the cylindrical portion (25), and is connected in an airtight manner. In this state, the flexible tube (2)
is connected to the cylindrical portion (25) in a manner that prevents it from being removed.

[effect] Since the present invention has the above configuration, it has the following unique effects.

Insert the flexible tube (2) as it is into the movable tube (3) and tighten it by simply screwing in the tube (4).
) of the flexible tube (2) are connected in an airtight manner on the outer periphery, and since both are connected in a manner that prevents them from being pulled out, the joint (
20) The installation work becomes easier.

Furthermore, since the balls CB) and (B), which have the same function as the conventional spacer (S), are held within the movable tube (3), there is no inconvenience of losing them.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5.

In the first embodiment shown in FIGS. 1 to 3, the joint (20) is
One side is provided with a male threaded part (28) for connection, and the other side is provided with a cylindrical part (25), and a tapered surface (27) as a pushing means is formed on the inner peripheral surface of this cylindrical part (25). At the same time, the movable tube (3) and the tightening tube (4) are integrated, and the cylindrical tightening is done by a screw (34).
5), a female screw portion is formed on the open end side of the tapered surface (27), and the tightening screw (34) is screwed into the female screw portion.

This first embodiment corresponds to the second embodiment, but
A tip cylinder portion (35) is formed on the tip side in the screwing direction,
Through holes (H) and (H
), balls (B), CB) having a diameter larger than the wall thickness of the through-hole forming portion are housed so as to be freely protrusive and retractable in the radial direction. In addition, the inner diameter of the screw (34) for said tightening is the same as that of the flexible tube (
2), and is tightened so that the flexible tube (2) can be inserted into the screw (34) with a small gap.

In this first embodiment, tightening is performed with the screw (34) pulled out and the tip of the flexible tube (2) inserted into the screw (34), as shown in Figures 1 and 2. Then, tighten the screw (34) as shown in Fig. 3. Then, the ball (
When B) and CB) coincide with the tapered surface (27), these balls (B) and (B) are pushed inward in the radial direction, and the balls (B) and (B) are attached to the flexible tube (2).
engages with the large diameter part of the After that, further tighten the screws (34
), the balls (B) and (II) remain engaged with the large diameter portion (26) of the flexible tube (2), and the flexible tube (
The tip of 2) is pushed into the cylindrical part (25) and is pressed against a packing (P) formed at the downstream end of the cylindrical part (25). As a result, as shown in the same figure, the flexible tube (2) is connected to the cylindrical portion (
25) It is held in a state where it is not pulled out, and the sealing of the contact surface with the tip is ensured. here,
When tightening the screw (34), tighten the screw (34).
A flange (36) formed at the outer end of the tool (34) serves as a tool-compatible part.

Next, in the second embodiment shown in FIGS. 4 and 5, the cylindrical portion (
25) accommodates a movable tube (3) into which the flexible tube (2) is inserted, and a clamping tube (4) fitted externally to the movable tube (3) and paired so as to be movable relative to each other within a certain range in the axial direction. It is something. In order to limit the relative movement range between the movable tube (3) and the tube (4) to a certain range, in this embodiment, the ribs (31) and (32) at both ends of the movable tube (3) are tightened. The interval between these protruding parts is set to be a certain length longer than the entire length of the tightening tube (4). A plurality of balls (B) and (B) are held within the wall thickness of the movable cylinder (3) at a predetermined position.

In the case of this embodiment, the tube (4) is tightened by the tube portion (25).
) is configured to be screwed into a threaded portion formed on the inner circumferential surface of the flexible tube (
2) and tighten the tube (4), the ball (B) whose tip protrudes toward the thick outer circumference of the movable tube (3)
), push the protruding parts of (B) inward and press the ball (B)
) and (B) will engage with the peaks on the outer periphery of the flexible tube (2). After that, the movable cylinder (3) is pushed in as the tip of the cylinder (4) comes into contact with the brim (31), and as a result, the movable cylinder (3) is pushed in, as shown in Fig. 5. As such, the flexible tube (2) is brought into pressure contact with the packing (P) provided at the downstream end of the cylindrical portion (25).

In the case of this second embodiment, a slit (37) is formed extending over a certain range from the outer end of the movable cylinder (3), and
Since the degree of protrusion of the flange (31) is reduced, the movable tube (3) and the tube (4) are tightened when fitting the movable tube (3) with the tube (4).
3) The diameter of the end of the tube (4) is forcibly reduced and tightened.
By externally fitting it, it can be installed in a state where it cannot be removed. Therefore, it is easy to assemble the movable tube (3) and the tightening tube (4).

In addition, in any of the above embodiments, the ball (B),
As for the holding structure (B), a through hole penetrating in the radial direction is formed in the constituent wall surface area of the movable tube, and the balls are inserted into each hole separately, and these balls are attached to the movable tube. To prevent it from escaping inside, as shown in the diagram,
The diameter of the inner peripheral side of the movable cylinder is set smaller than the diameter of the ball (B).

Further, in the second embodiment, the ball (B).

(B) is arranged in a staggered manner, and the axial distance between these balls in the movable tube is adjusted to the large diameter portion (26) of the flexible tube (2).
(26) By matching the mutual spacing, the balls engage at three locations in the axial direction of the flexible tube, and the tightening force is dispersed over a wide range of the flexible tube. Tightening can prevent the inconvenience of the fixing force acting intensively on the flexible tube. Further, since the flexible tube is engaged at three locations in the axial direction, the ball and the large diameter portion (26) can easily be engaged even if the initial position of the movable tube is shifted.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the first embodiment of the present invention, FIG. 2 is an explanatory diagram of the flexible tube being connected in the middle, and FIG. 3 is an explanatory diagram of the flexible tube connected state.
Figures 4 and 5 are explanatory diagrams of the '$2 embodiment, and Figure 6 is an explanatory diagram of the conventional example.・・・Cylinder part (3)・
・・Movable cylinder (4) ・・Tighten with the bolt (34) ・・Tighten with the screw (27) ・・Tapered surface

Claims (1)

[Scope of Claims] [1] The end of the flexible tube (2), in which the large diameter portions (26), (26) of the tube wall are uniformly continuous in the axial direction at regular intervals, is connected to the cylindrical portion (
25), a movable tube (3) accommodated in the tube portion (25) and into which the flexible tube (2) is inserted; and the movable tube (3). A plurality of balls (B) held so as to be freely retractable in the radial direction on the wall surface of (
B), a tightening tube (4) that is screwed into the tube part (25) and allows the movable tube (3) to integrally enter in the same direction, and by tightening this tightening tube (4), the ball ( B),
(B) A flexible pipe joint comprising a pushing means for pushing inward. [2] The pushing means is formed on the inner circumferential surface of the cylinder part (25) and has a tapered surface (27) that decreases in the direction of entry of the movable cylinder (3), and the tightening cylinder (4) is screwed and tightened. 2. The flexible pipe joint according to claim 1, wherein the movable tube (3) and the tightening tube (4) are engaged with each other so as to move integrally at a time. [3] The flexible pipe joint according to claim 2, in which the movable tube (3) and the tightening tube (4) are integrally coupled. [4] The pushing means is connected to the ball (B) protruding from the outer periphery of the movable cylinder (3), and the tightening cylinder (4) that is in contact with the top of (B).
) The flexible pipe joint according to claim 1, wherein the flexible pipe joint has a distal end portion.