JP2000088158A - Pipe body connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable connection by one common pipe body even in the case of a screw connection system wherein one pipe body side connected to the other pipe body has a screw part and even in the case of an insertion connection system wherein connection is effected through a clamp member after an outer insertion cylinder part is inserted externally of one pipe body. SOLUTION: A female screw part 24 and a fit-in surface 26 are formed on one pipe body 10. In the case of the other pipe body 12 of an insertion connection system, the external insertion cylinder part 30 of the pipe body 12 is inserted in the pipe body 10 and fitted in a fit-in surface 26 in a watertight manner through an O-ring 34. In this state, the flange parts 22 and 28 of a pair of the pipe bodies 10 and 12 are clamped by an elastic clip 36 for connection. Further, in the case of a screw connection system wherein the other pipe body 12 has a male screw 50, connection is effected by screwing the male screw 50 in the female screw 24 of the pipe body 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pipe connecting structure for connecting a pair of pipes.

[0002]

2. Description of the Related Art For example, a connection structure as shown in FIG. 7 has been generally adopted as a connection structure for connecting a faucet fitting and a pipe. In the figure, reference numeral 200 denotes a pipe on the piping side, which has a female screw portion 202 (FIG. 1A) on the inner peripheral side of a tip portion or a male screw portion 204 (FIG. 2B) on the outer peripheral side.

[0003] Reference numeral 206 denotes a tube on the faucet side, which is provided with a male nut 208 (FIG. 1A) on the outer peripheral side of the tip or a cap nut 212 (FIG. 2B) having an internal thread 210 on the inner peripheral side. Each has.

In the case of this conventional connection structure, as shown in FIG. 1A, a connection is made by screwing a male thread 208 of a tube 206 into a female thread 202 of a tube 200, or as shown in FIG. As shown in FIG.
No. 2 male screw part 204, cap nut 2 of tube 206
12 are screwed together to form a pair of pipes 200, 206.
Make the connection.

The sealing between the pair of tubes 200 and 206 is performed by winding a sealing tape around the male screw portion 208 shown in FIG. 1A and screwing it together, or as shown in FIG. This is performed by sandwiching the packing 214 between the pair of pipes 200 and 206 as shown in FIG.

However, in the case of the connection structure shown in FIG. 7, it is necessary to rotate the seal tape or use a tool to rotate the screw part many times in order to screw the screw part together. There is a problem that a variation in construction occurs due to the degree of winding of the sealing tape and the degree of turning of the screw.

On the other hand, a connection structure as shown in FIG. 8 has recently been used. In this connection structure, a pair of pipes can be connected with one touch by using a clamp member. More specifically, in the figure, reference numeral 216 denotes a smooth O-ring 218 provided on the tubular body 200 and having a smooth circular section extending in the axial direction of the tubular body.

Reference numeral 220 denotes an outer tube portion provided on the tube 206; 222 and 224, flange portions as flange portions provided on the tube 200, 206; and 226, elastic clips as clamp members. .

As shown in FIG. 8C, the elastic clip 226 is formed by bending a band-shaped metal leaf spring material into a substantially ring shape.
8 and an engagement groove 230 extending in the circumferential direction at the middle portion in the width direction.

In the case of this connection structure, the outer tube portion 220 is externally inserted into the fitting surface 216 of the tubular body 200, and is fitted watertight through the O-ring 218. Then, the elastic clip 226 is fitted with the fitting opening 228. Are fitted elastically so as to straddle the pipes 200, 206, and the pair of flanges 222, 222 of the pipes 200, 206 fitted in contact with each other.
The pair of pipes 200 and 206 are connected to each other in a watertight manner by engaging 224 in the engagement groove 230 of the elastic clip 226.

The connection structure shown in FIG. 8 allows the connection of the pipes 200 and 206 to be performed very easily with one touch. In recent years, this connection structure has been adopted in many cases. In fact, the connection structure using the screw connection method shown in FIG. 7 and the connection structure shown in FIG. 8 still exist in actuality. Therefore, for example, as a connection portion on one pipe side such as a pipe side pipe, Even if the other side (the other tube side) is a connection method using a screw shown in FIG. 7, or if the connection method is an insertion method by inserting the outer tube 220 shown in FIG. Desirably.

[0012]

The tube connecting structure of the present invention has been devised to solve such a problem. Thus, the pipe connection structure of claim 1 is a pipe connection structure for connecting a pair of pipes,
(B) a female screw portion or a male screw portion which is screw-coupled to a male screw portion or a female screw portion on the other tube side; and (b) the outer tube portion on the other tube side is extrapolated, and A smooth fitting surface extending in the pipe axis direction, which is watertightly connected to the inner peripheral face via a seal member, and a retaining means for retaining the pair of pipes in the coupled state in the pipe axis direction. It is characterized by having been provided.

[0013] A second aspect of the invention is characterized in that, in the first aspect, both the male screw portion and the female screw portion are provided on the one tube side.

According to a third aspect of the present invention, there is provided a tube connecting structure.
Wherein the retaining means has an engaging portion provided on the one tube and the other tube to engage directly or via another member.

According to a fourth aspect of the present invention, in the third aspect, the engaging portion comprises a flange-shaped portion projecting outward in a direction perpendicular to the tube axis, and the retaining means connects the engaging portion. It is characterized by including a clamp member for clamping in the tube axis direction.

According to a fifth aspect of the present invention, in the tube connecting structure according to the fourth aspect, the clamp member is formed by bending a band-shaped leaf spring material into a substantially ring shape, and is provided at a predetermined position in a circumferential direction. It has an opening for fitting, and extends along the circumferential direction, which can be engaged in a state where the flange portion on the one tubular body side and the mating flange portion on the other tubular body side are joined at the middle portion in the width direction. It is characterized by having an engagement groove.

[0017]

As described above, the connecting structure according to the first aspect of the present invention includes a female thread or a male thread which is screwed to a mating side of one tube, that is, a male thread or a female thread of the other tube. The outer tube portion on the side of the tube is extrapolated, and the inner peripheral surface of the outer tube portion is provided with a fitting surface that is water-tightly connected to the inner surface of the tube via a seal member. In this connection structure, the other side, that is, the other tube side, is connected in a common manner regardless of whether it is a screw connection type or an insertion connection type of the outer tube portion. This can be dealt with by different parts, and versatility can be enhanced.

In this case, the seal member can be previously mounted on either the inner peripheral surface or the fitting surface of the outer insertion tube portion.

According to a second aspect of the present invention, there is provided a connecting structure in which both the male screw portion and the female screw portion are provided on the one tubular body side. According to this connecting structure, the other tubular body side is provided with a male screw portion. In this case, a pair of pipes can be connected by screwing the male screw part to the female screw part on one tube side. Alternatively, when the other pipe side is provided with a cap nut, the female threaded portion on the inner peripheral surface of the cap nut is screw-coupled to the male threaded portion on the one pipe side to connect the pair of pipes. it can.

According to a third aspect of the present invention, there is provided a connecting structure in which the one pipe and the other pipe are provided with engaging portions which are engaged with each other in the axial direction of the tube directly or via another member, and include the engaging portions. In this way, the retaining means is configured, and according to this connection structure, the pair of pipes can be favorably retained.

According to a fourth aspect of the present invention, the engaging portion is constituted by a flange portion projecting outward in a direction perpendicular to the tube axis, and the flange portion is clamped in the tube axis direction by a clamp member. In this connection structure, the pair of pipes can be reliably prevented from being removed. Here, the engaging portion formed of the flange portion can be constituted by a flange portion continuous in the circumferential direction.

According to a fifth aspect of the present invention, there is provided a connection structure, wherein a predetermined form of a clamp member, that is, a band-shaped leaf spring material is bent into a substantially ring shape to form a fitting opening at a predetermined position in a circumferential direction, and a widthwise intermediate portion is formed. A pair of pipes is connected by using a clamp member having an engagement groove extending along the circumferential direction. Body connections can be made.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2, reference numeral 10 denotes, for example, a pipe on the pipe side, and reference numeral 12 denotes, for example, a pipe on the faucet side.
Is connected to a main pipe 14 made of a relatively soft resin pipe or the like. The other tube 12 is connected to a main tube 18 made of a relatively soft resin tube or the like.

In this embodiment, the pair of pipes 10, 12
Also forms a connection fitting.

A fitting surface 26 is formed on one of the pipes 10 on the outer peripheral surface from the distal end to the middle in the pipe axis direction. Here, the fitting surface 26 has a circular cross section and a smooth surface extending in the tube axis direction. An O-ring groove 32 is formed in the fitting surface 26, and an O-ring 34 as an elastic sealing member is mounted therein.

Further, a flange portion (engaging portion) 22 as a flange-like portion protruding outward in a direction perpendicular to the tube axis, following the fitting surface 26, is provided on the outer peripheral surface of the one tube body 10 over the entire circumference. It is formed. An internal thread 24 is formed on the inner peripheral surface of one of the tubes 10 following the opening.

1 and 2 (A), the outer tube 12 is formed with an outer tube portion 30 having a hollow inside and a circular cross-sectional shape.
A flange portion (engaging portion) 28 having the same form as the flange portion 22 is formed.

Numeral 36 denotes an elastic clip as a clamp member. The elastic clip 36 is formed by bending a band-shaped leaf spring material into a substantially ring shape.

The elastic clip 36 has a fitting opening 38 at a predetermined position in the circumferential direction, and an engaging groove 40 is formed in the middle part in the width direction along the circumferential direction. On the side opposite to the fitting opening 38, a relief portion 42 for avoiding interference with the flange portions 22 and 28 is formed. A guide portion 44 is formed which is open to the outside.

In FIG. 1, reference numerals 46 and 48 denote main pipes.
Or 18 is an insertion coupling part inside. FIG. 1 (B)
A male thread 50 is formed in the other tube body 12 shown in FIG.

In the connection structure of this embodiment, FIGS.
(A), when the other tube 12 has a hollow outer tube portion 30, first, a pair of tubes 10,
The outer tube portion 30 of the other tube 12 is extrapolated into the one tube 10 until the twelve flange portions 22 and 28 contact each other.
At this time, since the O-ring 34 is interposed between the inner peripheral surface of the outer insertion tube portion 30 and the fitting surface 26, they are fitted in a watertight manner.

Then, under the above-mentioned fitting condition, the elastic clip 36
Is elastically fitted so as to straddle the pair of pipes 10 and 12 through the fitting opening 38, and the pair of flange portions 22 and 28 abutting are engaged with the engagement grooves 40 of the elastic clip 36, whereby the pair of Pipes 10 and 12 can be connected.

On the other hand, as shown in FIGS. 1 and 2B, when the other tube 12 has a male screw portion 50, the male screw portion 50 is connected to the female screw portion 24 of the one tube 10.
By screwing in the pair, the pair of pipes 10 and 12 can be connected.

In the connection structure of this embodiment, one of the tubes 10 is
The inner peripheral side is provided with a female screw portion 24 and the outer peripheral side is provided with a fitting surface 26 on which an O-ring 34 is mounted. Therefore, according to the present embodiment, the other tubular body 12 Regardless of the type or the type of screw connection using the external thread portion 50, one of the pipes 10 can be used with a common type, and versatility can be improved.

In the connection structure of this embodiment, one of the pipes 10
Is provided with a flange portion 22, so that the flange portion 2
2 and the flange portion 28 of the other tube body 12 are both engaged in the engagement groove 40 of the elastic clip 36, so that a pair of tube members 1
0 and 12 can be connected very easily with one touch by the elastic clip 36.

FIGS. 3 and 4 show another embodiment of the present invention. In one of the tubes 10 in this example, a female screw portion 24 and a male screw portion 64 are provided on the inner peripheral surface and the outer peripheral surface, respectively, on the distal end side. , A smooth fitting surface 26 is formed.

Also in this example, the flange portion (engaging portion) 22 protruding outward in a direction perpendicular to the tube axis is formed on the outer peripheral surface of one of the tubes 10 following the fitting surface 26 over the entire circumference. O-ring grooves 3
2, an O-ring 34 as an elastic sealing member is mounted thereon.

On the other hand, the other tube body 12 shown in FIG. 3B has a cap nut 70 having a female screw portion 72 on the inner peripheral surface. Reference numeral 58 in the figure denotes a ring-shaped packing for sealing.

In the connection structure of this embodiment, FIGS.
(A), when the other tube 12 is of the plug-in connection type having the outer tube portion 30, the other tube 12
Is externally inserted into one of the tubes 10, and the externally inserted cylinder 3
The inner peripheral surface 0 is fitted to the fitting surface 26 through an O-ring 34 in a watertight manner.

At the same time, the elastic clip 36 is connected to one of the tubular bodies 1.
The pair of pipes 10 and 12 are connected by using the flange 22 at 0 and the flange 28 at the other pipe 12 to elastically fit over the pipes 10 and 12.

On the other hand, as shown in FIGS. 3 and 4B, when the other tube body 12 is of the screw connection type having the female screw portion 72, the female screw portion 72 is
Specifically, the female screw portion 72 on the inner peripheral surface of the cap nut 70 is screwed through the packing 58, whereby the pair of pipes 10, 12
Make the connection.

On the other hand, as shown in FIGS. 3 and 4C, when the other tube 12 is of the screw connection type having the male screw portion 50, the female screw portion 24 of the one tube 10 is used.
Then, the male screw portion 50 of the other tube 12 is screwed through the seal tape, and the pair of tubes 10 and 12 are connected.

Also in the connection structure of this example, the other tube 12 is connected to the outer tube portion 30 by a plug-in connection method or the female screw portion 7.
2 or a screw connection method using the male screw portion 50, a common pipe 10 can be used.

FIGS. 5 and 6 show still another embodiment of the present invention. In the embodiment shown in FIGS. 1 to 4, the O-ring 3
5 and 6, the O-ring groove 32 is formed on the inner peripheral surface of the outer tube portion 30 in the other tube body 12 having the outer tube portion 30 in the examples of FIGS. An O-ring 34 as a sealing member is mounted there. Other points are the same as those of the embodiment of FIGS.

Although the embodiments of the present invention have been described in detail above, these are merely examples. For example, the elastic clip 3 in the above example is used as a clamp member for clamping a pair of tubes.
It is also possible to use a configuration other than 6. In some cases, the main pipe 14 constitutes one pipe body,
A male thread, a female thread, a flange, a fitting surface, and the like to be provided on one of the tubes may be formed integrally with the main pipe 14.

Further, in the present invention, the pair of pipes is elastically fitted with a predetermined frictional force and is prevented from coming off by the frictional force between the pair of pipes, that is, it is generated between the pair of pipes. The present invention can be configured in a form in which various changes are made without departing from the gist of the present invention, for example, the frictional force can be configured as a retaining means.

[Brief description of the drawings]

FIG. 1 is a view showing a pair of pipes and a clamp member in a pipe connection structure according to an embodiment of the present invention.

FIG. 2 is a view showing a state in which a pair of pipes in FIG. 1 are connected.

FIG. 3 is a diagram showing another embodiment of the present invention.

FIG. 4 is a view showing a state in which a pair of pipes in FIG. 3 are connected.

FIG. 5 is a diagram showing still another embodiment of the present invention.

FIG. 6 is a diagram showing still another embodiment of the present invention.

FIG. 7 is a view showing a conventional pipe connection structure.

FIG. 8 is a view showing another conventional pipe connection structure different from FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 One tube 12 The other tube 22, 28 Flange part (engagement part) 24 Female screw part 26 Fitting surface 30 External insertion tube part 34 O-ring (seal member) 36 Elastic clip (clamp member) 38 For fitting Opening 40 Engagement groove 50, 64 Male thread 72 Female thread

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoshihiro Minami 5-1-1 Koiehoncho, Tokoname-shi, Aichi Prefecture Inax Corporation (72) Inventor Shigeru 5-1-1 Koiehonmachi, Tokoname-shi, Aichi Prefecture Inax Corporation (72) Inventor Masaaki Nagata 5-1-1 Koiehonmachi, Tokoname-shi, Aichi F-term (in reference) in Inax Co., Ltd. 3H013 JC05 3J106 AB01 BA01 BB01 BC04 BC06 BD01 BD03 BE40 CA03 EA03 EB08 EC01 EC07 ED33 ED36 ED37 EE02 EF04

Claims (5)

[Claims] 1. A pipe connection structure for connecting a pair of pipes, comprising: (a) a female thread or a male thread which is screw-coupled to a male thread or a female thread of the other pipe;
(B) The outer tube portion on the other tube side is extrapolated, and the outer tube portion is connected to the inner peripheral surface of the outer tube portion in a watertight manner via a seal member. A pipe connection structure comprising: a pair of pipes; and a locking means for locking the pair of pipes in the pipe axial direction in a connected state. 2. The tube connection structure according to claim 1, wherein the one tube side has both a male screw portion and a female screw portion. 3. The device according to claim 1, wherein said retaining means has an engagement portion provided on said one tube and said other tube and engaged directly or via another member. Characteristic tube connection structure. 4. A clamp member according to claim 3, wherein said engaging portion comprises a flange-like portion projecting outward in a direction perpendicular to the tube axis, and wherein said retaining means clamps said engaging portion in the tube axis direction. A pipe connection structure comprising: 5. The clamp member according to claim 4, wherein the clamp member has a form in which a band-shaped leaf spring material is bent into a substantially ring shape, and has a fitting opening at a predetermined position in a circumferential direction. And it can be engaged in a state in which the flange-shaped portion on the one tubular body side and the mating flange-shaped portion on the other tubular body side are combined at the widthwise intermediate portion,
A pipe connection structure comprising an engagement groove extending along a circumferential direction.