JPH10220668A - Small bore tube joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve reliability of connecting work by tapering a flange of a joint body, and mounting a sheet spring previously to the joint body in a small bore tube joint connected by male and female fitting and prevented from slipping off by the U-shape sheet spring with a pair of cutout parts. SOLUTION: A check valve holder 1 is erected being thread-fastened to an existing stop cock, but prior to erecting this holder 1, a U-shape flat spring 10 is inserted from a lateral direction and mounted to a flange 6 of the holder 1, and then a surrounding cover 11 is put on the flat spring 10 from above to prevent opening of U-shape. When a hose 2 is gripped to male and female-fit a hose union 7 to the holder 1, a tapered flange 8 enlarges the diameter of the sheet spring 10, and this flange 8 is inserted in a cutout part 9. When the flange 8 is completely inserted in the cutout part 9, the flat spring 10 is put in reset action by its spring force, and the hose 2 is connected to the holder 1 in a single operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small-diameter pipe joint for water supply which is piped to a building or the like.

[0002]

2. Description of the Related Art In general, a small-diameter pipe joint which can be connected by one-touch operation (in this specification, the operation is completed by a single push) is a so-called male-female fitting having a socket and a spout. Let the spring ring (also called fastener spring)
This prevents the fitting.

[0003] For example, a one-touch type small-diameter pipe joint disclosed in Japanese Patent Publication No. 46-4484 uses a U-shaped spring ring made of a wire spring to prevent male and female fittings from coming off. And since such a wire spring is used, the male joint body is always in the opening of the female joint body,
It can rotate.

[0004] Small-diameter pipe joints that prevent the male and female fittings from being disengaged by such U-shaped spring rings are currently used for piping in sink and wash cabinets.

[0005] The U-shaped spring ring is roughly classified into a retaining member using a thin plate spring and a retaining member using a wire spring.

For example, a flange is provided on each of the male and female joints, these flanges are joined by male and female fitting, and a part of the peripheral edge of the joined flange is inserted.
A pipe joint (see, for example, Japanese Unexamined Patent Publication No. 7-260071) in which a joined flange is sandwiched by a U-shaped spring ring made of a thin plate spring having a pair of cutouts (this is called a U-shaped thin plate spring).
Japanese Patent Laid-Open No. 7-2699751) is the former type, and a pair of notched portions are provided in the female joint body, and an outer peripheral groove is provided in the male joint body, When a U-shaped spring ring made of a wire spring is attached to the notch-shaped notch and then fitted with a male and female, this spring ring is fitted into the outer peripheral groove, and a pipe joint that prevents the male and female from being fitted (for example, Japanese Unexamined Patent Publication No. 6-50483). Japanese Patent Application Laid-Open No. 6-81990) is the latter type.

The latter type of retaining member using a wire spring has a small exposed portion when attached to a pipe joint, and has a high tensile strength, so that the retaining member does not come off. Although the second retaining member is not required, there is concern about the centering and connection holding of both joint bodies, so it is necessary to fix the joint with a cap nut,
In addition, the provision of the large notched portions facing each other reduces the strength of the joint body, and may damage the male-female fitting seal.

On the other hand, in the former type of retaining member using a U-shaped thin leaf spring, although there is no concern about the above-mentioned wire spring, it is exposed and easily comes off, so that the second retaining member is further mounted. I use it.

For example, in the above-mentioned Japanese Patent Application Laid-Open No. Hei 7-260071, elastic engaging claws are provided at each end of the U-shape of the U-shaped thin plate spring toward the outer peripheral surface of the joined flange. The U-shaped thin plate spring is prevented from coming off by engaging the elastic coupling claw with a knurl formed on the outer peripheral surface of the flange (this corresponds to a second retaining member).

[0010]

However, in such a second retaining member, since the thin plate spring is U-shaped,
If the force to open the U-shape (to separate the ends of the U-shape from each other, the same applies hereinafter) is large, the elastic engaging claw is disengaged from the knurl and functions as the second retaining member. May be lost.

For this reason, after the U-shaped thin plate spring is mounted on the pipe joint at the installation site, in order to prevent the U-shape from opening, the whole thin plate spring is covered or only the both ends of the U-shape are gripped. And a second retaining member for covering.

However, even with the second retaining member, there is a possibility that the second retaining member may come off in a direction opposite to the mounting direction, and the second retaining member may be attached after the U-shaped thin plate spring is mounted on the pipe joint. In this case, the mounting operation is performed in two steps, and when combined with the male and female fitting operation, the mounting operation is performed in three steps, thus impairing the original one-touch operation.

In order to solve such a problem, the present invention mounts a retaining member made of a U-shaped thin plate spring on a pipe joint. However, the main purpose is not to impair the one-touch operation even if it is a manual operation to assemble it into a single joint body in advance. After the male and female fitting, the U-shaped thin plate spring is surely opened in the U-shape. Its secondary purpose is to prevent it.

[0014]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides: 1) a small-diameter connector comprising a male-side joint body and a female-side joint body, wherein the male-female joint is connected by a one-touch operation; A U-shaped thin plate spring having a pair of cutouts in a pipe joint, wherein the flanges respectively provided on the two joint bodies are joined by the male and female fittings, and a part of the periphery of the joined flanges is inserted. Thus, in a small-diameter pipe joint in which male and female fittings are prevented from being pulled out, a taper whose opening side is reduced is attached to one of the flanges, and
The U-shaped thin plate spring is opened and inserted into the notch, and the U-shaped thin plate spring is attached to the other flange side joint body before male and female fitting so as not to impair the one-touch operation. 2) The U-shaped thin plate spring according to claim 1 is prevented from being opened after the male and female fitting, and is mounted so as to be movable in the axial direction. A third retaining member is attached, the second retaining member is prevented from moving in the axial direction after the male-female fitting, and the third retaining member is previously mounted on the one flange side joint body before the male-female fitting. The gist of the present invention resides in a small-diameter pipe joint provided with a retaining member, and 3) a small-diameter pipe joint in which a flexible pipe is connected and fixed to one of the flange-side joint bodies according to claim 1 or 2.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

FIG. 1 is a one-touch operation process diagram of an embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, FIG. 3 is a longitudinal sectional view of FIG. 1, FIG. FIG. 5 is a detailed view of another main part of FIG. 1, and FIG. 6 is a conventional example.

The embodiment of the present invention relates to a small-diameter pipe fitting for water supply (hot water or water) to be piped in a building, and is particularly advantageous when used in a pipe in a narrow cabinet such as a sink or a sink. Become. Therefore, a flexible hot water supply and a water supply hose are provided on the branch pipe with a water stopcock protruding from the wall surface.
Are connected to each other, which is convenient for installation work of a hot and cold water mixing tap installed on a sink.

That is, as shown in FIG. 6, water stopcocks 51, 51 are protrudingly provided on the wall surface 50 of a building such as an apartment building. The branch pipes composed of the valve holders-1 and 1 are respectively connected.
Hot and cold water supply hoses (flexible pipes) 2 and 2 are connected to these hot water and water check valve holders 1 and 1 by male and female fittings, and small-diameter pipe joints 3A and 3 used for this connection.
A is advantageous in this embodiment.

First, a first retaining member 4 for retaining the male and female fittings in the small-diameter pipe joint 3 of the present embodiment.
And a second to prevent the first retaining member 4 from coming off.
Of the retaining member 5 will be outlined. It should be noted that only one of the small diameter pipe joints 3 and 3 of the hot water and the water has the same structure, and only one will be described below.

In FIG. 2 (the arrows a and b indicate the flow of water), the check valve holder-1 is made of a copper alloy and has a flange 6 at one end.

On the other hand, a hose union (connection fitting) 7 made of copper alloy is fixed to the tip of a hose 2 made of synthetic rubber or the like and having an inner diameter of 7 mmφ. A tapered taper (tapered taper) is provided, and the flange 6 forms a flange 8 having a ring portion with which it comes into contact.

The check valve holder 1 constitutes the female part of the joint body, and the hose union 7 constitutes the male part of the joint body. When the male and female are fitted, the flange 6 and the tapered flange 8 are joined (particularly, see FIG. 3C).

A U-shaped thin plate spring 1 for holding the joined flanges 6 and 8 to prevent the male and female fitting from being pulled out.
Numeral 0 is made of SUS and has a pair of cutouts 9, 9 for inserting a part of the peripheral edge of these flanges 6, 8 and sandwiching them. Therefore, the U-shaped thin plate spring 10 serves as the first retaining member 4 for retaining the male and female fittings.

In order to prevent the U-shaped thin plate spring 10 from coming off, a surrounding cover 11 made of POMD (made of synthetic resin) is used.
Over it. Therefore, the surrounding cover 11 serves as the second retaining member 5. Further, an E-shaped retaining ring 12 is used to prevent the surrounding cover 11 from coming off. The E-shaped retaining ring 12 serves as a third retaining member.

Next, how to use the first, second and third retaining members 4, 5, and 12 in the small-diameter pipe joint 3 as described above will be described.

As shown in FIG. 6, the check valve holder-1
Is screwed to an existing projecting water stopcock 51, and the hose 2 is suspended from a hot / water mixer tap installed on a top plate of a sink (not shown). .

Therefore, before the check valve holder 1 is erected on the water stopcock 51, as shown in FIG. 1 (this is a process diagram showing the order of assembly from the left, from the top), the check valve holder -1 flange 6 in the transverse direction (in this specification, the axial direction of the check valve holder 1 is referred to as up, down, or longitudinal direction, and the direction orthogonal thereto is referred to as the transverse direction). After mounting, the surrounding cover 11 is placed over the U-shaped thin plate spring 10 from above to prevent the U-shaped opening.

On the other hand, an E-shaped retaining ring 12 is inserted into the hose union 7 in advance from the lateral direction and mounted. If the above mounting is performed at the production factory, the components can be assembled and shipped, and the work at the mounting site is literally a one-touch operation, which makes it even easier.

When the hose union 7 is fitted into the check valve holder 1 by male and female as shown by the arrow a in FIG. Since the spring 10 is slightly moved in the direction opposite to the insertion direction as shown by the arrow b in FIG. 1 to expand the diameter, the tapered flange 8 can be inserted into the cutout 9. Tapered flange 8
Is inserted into the notch 9, the U-shaped thin plate spring 1
0 is returned by the spring force as shown by arrow c in FIG.
It comes into contact with the E-shaped retaining ring 12.

Therefore, the check valve holder 1 is
The screw 2 can be connected by a one-touch operation in a narrow cabinet, and together with the function of preventing the surrounding cover 11 and the E-shaped retaining ring 12 from coming off, a so-called squeaker is formed and cannot be easily detached. As a result, this small-diameter pipe joint 3
An amateur accidentally removes the inside of the cabinet and floods the inside of the cabinet, so that unexpected accidents can be completely prevented. Of course, if a professional builder tries to disassemble such a squirrel,
The removal operation may be performed by removing the well-known E-shaped retaining ring 12.

Next, each component will be described in detail. First, the check valve holder-1 shown in FIG. 3 will be described. 3 (A) is a longitudinal and transverse section of the check valve holder-1, FIG. 3 (B) is a longitudinal and transverse section before fitting the hose union 8 to the check valve holder-1, male and female, and FIG. The vertical and horizontal cross sections after fitting of the male and female are shown, but the check valve holder 1 has a poppet valve 13 for a check valve.
The poppet valve 13 is a valve seat and guide cylinder 14
Opened and closed by water pressure. This poppet valve 13
, The lower opening 15 of the check valve holder-1
Is provided with a screw that is screwed into the water stopcock 51 (see FIG. 6).

The upper opening 16 of the check valve holder-1
Is opened so that the hose union 7 fits tightly inside,
An O-ring 17 is fitted in the middle between the upper and lower portions to seal.
An outward flange 6 is formed at the upper end of the check valve holder-1.

Next, the hose union 7 shown in FIG. 3 will be mainly described. This is made of a bamboo-like joint 18 on which the lower end of the synthetic rubber hose 2 is fitted externally, and the lower part of the joint 18 is E
A ring groove 19 into which the retaining ring 12 is fitted, and a taper (tapered taper) having a diameter reduced toward the opening formed below the ring groove 19.
And an inner fitting portion 20 which fits inside the upper opening 16 of the check valve holder-1.

The lower end side of the synthetic rubber hose 2 is externally fitted to the bamboo shoot joint 18 and then tightened with a collar 21.
Is fixed by caulking.

Next, the U-shaped thin plate spring 10 is mainly
(B), (C), (D) and FIG. 2 are shown, FIG. 5 (B) is a plan view, (C) is a side view, and (D)
Shows a front view.

The U-shaped thin plate spring 10 is called a fastener spring in JIS and has a thickness of about 0.8 mm and a width of 12 mm.
The SUS spring plate having a thickness of mm is formed in a substantially U-shape. That is, the U-shaped connecting portion 22 is formed in a U shape, the pair of U-shaped intermediate portions 23 is formed in an arc shape, and the pair of U-shaped end portions 24 are formed in a C-shaped shape.

A notch 25 is provided in the U-shaped connecting portion 22,
U-shaped opening is easy. Of course, the cut 25 need not be provided. Further, a pair of notches 9 and 9 are provided in the U-shaped intermediate portion 23 over the U-shaped connecting portion 22 and the U-shaped end portion 24 so that a part of the periphery of the joined flanges 6 and 8 can be used. I try to insert it.

Next, the surrounding cover 11 is mainly shown in FIG. 4, FIG. 3 and FIG. 2. In particular, FIG. 4 (A) is a sectional view taken along the line A--A in FIG. B) is FIG. 4 (A)
4C is a cross-sectional view taken along the arrow B, FIG. 4C is a cross-sectional view taken along the arrow C-C in FIG. 4B, and FIG.

The surrounding cover 11 is shaped to cover mainly the outer periphery of the U-shaped thin plate spring 10 and cover the U-shaped thin plate spring 10.
A pair of circular arc portions 27 covering a pair of U-shaped intermediate portions 23
And a pair of slits 28 having a lower opening for guiding the pair of U-shaped ends 24, a ceiling 29 of the U-shaped part 26, and a slit connecting part 30.

The U-shaped portion 26 has a depth L of 8 mm and a width W of
8.5 mm (both refer to FIG. 4 (B))
2 is formed in a size that can be slidably fitted inside. The pair of arc portions 27 is formed in a darma shape, the large diameter portion 31 is formed to have a size that opens the U-shaped end portion 24 by the tapered flange 8, and the small diameter portion 32 is formed in the U-shaped end portion. 24 is formed to the size when it is returned by the spring.

Accordingly, as shown in FIG. 3, the U-shaped thin plate spring 10 is covered with the surrounding cover 11 (FIG. 3).
In (A)), the U-shaped connecting portion 22 is located at the back of the U-shaped portion 26, the U-shaped intermediate portions 23, 23 are located at the small diameter portion 32, and
The U-shaped end portion 24 is drawn into the slit portion 28 and inserted.

When the tapered flange 8 is brought into contact with the U-shaped thin plate spring 10 to open the U-shape by the male and female fitting, as shown in FIG. U-shaped middle portions 23, 23 drawn out from the character portion 26 are large-diameter portions 3.
1 and the U-shaped end portion 24 projects from the slit portion 28 to open the U-shape.

Next, when the tapered flange 8 is inserted into the cutout 9, the U-shaped thin plate spring 10 acts so as to close the U-shape by its spring force. Returning to the position of FIG. 3 (A), it becomes as shown in FIG. 3 (C).
In other words, the protruding portion that hooks the surrounding object is drawn in like a turtle's limbs.

Next, the E-shaped retaining ring 12 is mainly configured as shown in FIG.
(A) is shown in the plan view, which is
A JIS standard product for a spring with a diameter of 1 mm is used. That is, the ring groove 19 is configured to be gripped at three points of the entrance side two points 33, 33 and the back side one point 34, and the entrance side two points 3
The distance between the ring grooves 3 and 33 is slightly smaller than the outer diameter of the bottom of the ring groove 19, and the two inlet-side points 33 and 33 are opened to open the ring groove 19.
To be inserted from the side. The method of attaching and detaching the E-shaped retaining ring 12 is performed by a usual method.

It should be noted that the present invention is not limited to the second retaining member comprising the surrounding cover 11 of the above-described embodiment, and that the second retaining member holds only U-shaped ends. In order to prevent the U-shape from opening, if such a second retaining member, the second retaining member is previously attached to an E-shaped retaining ring as a third retaining member. What is necessary is just to comprise so that it may be fixed and movable in the axial direction, and the third retaining member may be fixed after the male and female fitting.

A cap nut may be used instead of the E-shaped retaining ring 12 as the third retaining member. When this cap nut is used, it is not a strict one-touch operation, but the screw-in operation of the cap nut can be easily performed, so it can be said that it is a quasi-one-touch operation.

Further, the present invention is not limited to the small-diameter pipe joint 3 used for a hot and cold water mixing tap, and is particularly used for a small-diameter pipe joint connected to a water purifier, a dishwasher, etc. in a building that cannot be remodeled, such as an apartment. be able to.

[0048]

According to the first aspect of the present invention, since a flange joined by a U-shaped thin plate spring is sandwiched, notches are not provided in the joint body, centering and connection holding are good, and strength of the joint body is obtained. The use of a U-shaped thin plate spring does not impair the sealability, of course, but does not impair the one-touch operation.

According to the second and third aspects, the second retaining member for preventing the U-shaped thin plate spring from opening the U-shape is provided, and the third retaining member for preventing the second retaining member from coming off is provided. By attaching the retaining member of the above, the saddle seen from the viewpoint of an amateur can be constituted, and even if it is attached, the one-touch operation performed by pushing the flexible pipe is not impaired.

[Brief description of the drawings]

FIG. 1 is a one-touch operation process diagram of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a longitudinal sectional view of FIG.

FIG. 4 is a detailed view of a main part of FIG. 1;

FIG. 5 is a detailed view of another main part of FIG. 1;

FIG. 6 is a conventional example.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 check valve holder 3 small diameter pipe joint 4 first stopper member 5 second stopper member 6 flange 7
Hose union, 8 ... tapered flange, 9 ... notch,
10: U-shaped thin plate spring, 11: surrounding cover, 12: E-shaped retaining ring

Claims (3)

[Claims] 1. A small-diameter pipe joint comprising a male-side joint body and a female-side joint body, which is connected to a male-female joint by one-touch operation, wherein a flange provided on each of the two joint bodies is provided. A small-diameter tube joined by the male-female fitting and having a pair of cutouts into which a part of the periphery of the joined flange is inserted to prevent the male-female fitting from being removed by a U-shaped thin plate spring. In the joint, a taper whose opening side is reduced in diameter is attached to one of the flanges so that the U-shaped thin leaf spring is opened and inserted into the notch, and the U-shaped thin leaf spring is fitted with a male and female. A small-diameter pipe joint characterized in that a one-touch operation is not impaired by being previously attached to a joint body on the other flange side before joining. 2. A U-shaped thin plate spring according to claim 1, wherein a U-shaped opening is prevented after the male and female fitting, and a second retaining member mounted so as to be movable in the axial direction is provided. 2. A small-diameter pipe joint in which the retaining member of No. 2 is prevented from moving in the axial direction after the male and female fitting, and a third retaining member previously attached to the one flange side fitting body before the male and female fitting is attached. 3. A small-diameter pipe joint in which a flexible pipe is connected and fixed to one of the flange-side joint bodies according to claim 1 or 2.