JP2552795B2 - How to install the water faucet - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mounting a water faucet, which is mounted on a branch port formed in a large-diameter fluid pipe such as a water pipe and has excellent earthquake resistance.

[0002]

2. Description of the Related Art A known type of water faucet of this type is shown in FIG. Reference numeral 01 denotes a water faucet, and a hollow cylindrical metal fitting with an upper and lower opening formed at the lower end portion with a large-diameter portion 02.
And a rubber ring fitted and mounted on the outer periphery of the tubular fitting 02.
04, a washer 05, and a tightening nut 06 screwed into a male screw 07 formed at the upper end of the cylindrical metal fitting 02. The large-diameter portion 03 is a large-diameter annular flange portion 08, which is formed at the lower end through a step portion 09 and a tapered portion 010. Reference numeral 011 denotes an annular projection formed at the lower end of the rubber ring 04. Reference numeral 012 denotes a branch port formed by drilling a fluid pipe 013. Here, the rubber ring 04 is screwed with a tightening nut 06 to form a hollow cylindrical metal fitting. 02 is pressed.

[0003]

By the way, the conventional water tap 01 and the apparatus to which the tap is attached have the following various problems. (1) The tubular metal fitting 02, the rubber ring 04, etc. inserted into the branch port 012 must be accurately positioned and attached, and the attachment of the water faucet 01 was not easy. (2) Since the outer diameter of the flange portion 08 of the tubular metal fitting 02 is smaller than that of the branch port 012, if the withdrawal force acts on the water faucet 01, the effect of retaining the rubber ring 04 beyond the shearing force cannot be expected. This is the same as when the coil spring is annularly embedded in the rubber ring 04, the spring escapes to the inner surface of the pipe. (3) Since a circular hole is bored in the fluid pipe 013 as the branch port 012, the hole edge on the inner surface of the pipe is not a circle lying on a horizontal plane but a circle formed on a curved surface. There is a difference in height from the periphery. Since the tapered portion 010 and the flange portion 08 of the cylindrical metal fitting 02 are circles on a horizontal plane, even if the rubber ring 04 is pressed against the branch port 012, the compressed state becomes nonuniform, and there is a concern about fluid sealing. In particular, there is a problem near the hole edge in the pipe axis direction. (4) Since the rubber ring 04 is sandwiched between the tightening nut 06, the taper portion 010, and the flange portion 08 via the washer 05, the washer 05 and the outer surface of the pipe are in contact with each other, and it is difficult to bend with respect to a lateral force. (5) When the ground changes due to an earthquake or the like and a large lateral force is applied to the dipstick 01 and tilts, the uneven compression ratio of (2) is further increased, and the compression ratio on one side cannot be maintained. Since the rubber ring 04 is sandwiched between the flange portion 08, the tapered portion 010, and the washer 05, the rubber ring 04 may be damaged if the stopper moves. (6) Cutting chips are generated when the pipe 013 is drilled. This chip is located at the top of the tube, and when the tightening nut 06 is tightened in this state, the chip is caught between the washer 05 and the tube 013. There is no problem with the sealing mechanism in this state, but if the chips that have been trapped move due to vibrations caused by an earthquake or other work, vibrations caused by a vehicle, etc., and fall off from the lower part of the washer 05, only the thickness of the chips The faucet 01 is lowered, the compressed state of the rubber ring 04 is released, and the sealing effect is greatly reduced.

In view of the above, the present invention solves the above-mentioned conventional problems and allows the water faucet to be attached very easily to the branch port of the fluid pipe by using the push shaft, and after the attachment, It is possible to improve the separation prevention force from the branch port formed in the fluid pipe, eliminate the uneven compression ratio of the rubber ring due to the difference in the height of the hole edge of the branch port, and apply the lateral force. Even if it does, the structure can be softly bent, and even if it bends it can prevent the rubber ring from being damaged and prevent the sealing function from deteriorating. It is intended to provide a method for attaching a stopper.

[0005]

In order to achieve the above object, a method of mounting a water faucet according to a first aspect of the present invention comprises a pushing shaft having a tapered conical portion formed at a lower end thereof. On the shaft, the metal fitting and the mounting member in which the outward annular flange portion formed at the upper end portion of the tubular metal fitting is mounted on the upper surface of the inward annular flange portion formed at the lower end portion of the tubular mounting member and engaged The inner peripheral surface of the metal fitting is in sliding contact with the outer peripheral surface of the push-in shaft, and the conical tapered narrowing portion formed by previously narrowing with a press or the like on the lower end portion of the tubular metal fitting and the tip of the narrowing portion. The inner peripheral surface of the narrowed part of the small diameter cylindrical part consisting of the expanded part, which is extended in the axial direction by a predetermined length and whose outer diameter at the tip is smaller than the outer diameter of the tubular fitting, is the outer periphery of the conical part. It is fitted and supported so that it abuts the surface, and an outward annular flange is formed at the upper end and at the lower end. After the rubber ring provided with the protrusions is fitted and supported so as to come into contact with the outer peripheral surface of the narrowed portion of the tubular metal fitting, the push shaft is pushed from the lower end side into the branch port formed in the fluid pipe. After press-fitting, the annular flange portion of the rubber ring comes into contact with the outer peripheral surface of the fluid pipe, and the annular flange portion of the mounting member comes into contact with the upper surface of the annular flange portion of the rubber ring. Expand the small-diameter cylindrical part so that the annular protrusion of the rubber ring contacts the inner peripheral surface of the fluid pipe, the outer diameter of the narrowed part is almost equal to the outer diameter of the tubular metal fitting, and the tip of the expanded part The outer diameter is larger than the diameter of the branch opening.

According to a second aspect of the present invention, there is provided a method of mounting a water faucet, wherein a tapered cone portion is formed at a lower end portion, and a retaining ring engaging annular step portion is formed at a base end of the cone portion. And a retaining ring engaged with the annular step of the pushing shaft,
On the push shaft with the retaining ring engaged with the annular step, the outward annular flange formed on the upper end of the tubular metal fitting is placed on the upper surface of the inward annular flange formed on the lower end of the tubular mounting member. The metal fitting and the mounting member engaged with each other are tapered in a conical shape in which the inner peripheral surface of the tubular metal fitting is in sliding contact with the outer peripheral surface of the pushing shaft, and the lower end of the tubular metal fitting is narrowed in advance by pressing or the like. Consists of a narrowing portion and a widening portion that is extended from the tip of the narrowing portion in the axial direction by a predetermined length, and the outer diameter of the tip is smaller than the outer diameter of the tubular metal fitting. The inner peripheral surface of the narrowing portion of the small-diameter tubular portion, which has an annular groove for engaging the retaining ring formed on the inner peripheral surface of the distal end of the portion, is fitted and supported so that the inner peripheral surface of the narrowed portion contacts the outer peripheral surface of the conical portion, and the upper end A rubber ring with an outward annular flange formed on the bottom and an annular protrusion on the lower end of the tubular metal fitting After being inserted and supported so as to come into contact with the peripheral surface, this push shaft is pushed from the lower end side into the branch port drilled in the fluid pipe and press-fitted, and the annular flange portion of the rubber ring contacts the outer peripheral surface of the fluid pipe. After the annular flange portion of the mounting member comes into contact with the upper surface of the annular flange portion of the rubber ring, the small-diameter tubular portion of the tubular metal fitting is further pushed by pushing the pushing shaft so that the annular protrusion portion of the rubber ring becomes the inner peripheral surface of the fluid pipe. While expanding so as to come into contact, the retaining ring engaged with the annular step is fitted into the annular concave groove of the tubular metal fitting to hold the expanded small diameter tubular portion, and the small diameter tubular portion of the tubular metal fitting. The outer diameter of the narrowing portion is substantially equal to the outer diameter of the tubular metal fitting, and the outer diameter of the tip of the expanding portion is larger than the diameter of the branch opening.

According to a third aspect of the present invention, there is provided a water faucet mounting method, wherein a tapered conical portion is formed at a lower end portion, and a large distance is provided from the conical portion at least the axial length of the tubular metal fitting. A pressing shaft having a diameter portion is formed, and a holding cylinder body is disposed so as to be in sliding contact with the outer peripheral surface of the pressing shaft and the inner peripheral surface of the tubular metal member. Mounted on the push shaft fitted in, the outer annular flange formed on the upper end of the tubular metal fitting is mounted on the upper surface of the inward annular flange formed on the lower end of the cylindrical mounting member The inner peripheral surface of the tubular metal fitting is in sliding contact with the outer peripheral surface of the holding tubular body, and the conical tapered narrowing portion formed by previously pressing the lower end portion of the tubular metal fitting with a press or the like. Extending from the tip of the part to a predetermined length in the axial direction, the outer diameter of the tip is smaller than the outer diameter of the tubular metal fitting. The inner peripheral surface of the narrowed portion of the small-diameter cylindrical portion having the expanded portion is fitted and supported so as to come into contact with the outer peripheral surface of the conical portion, and the outer annular flange portion is formed at the upper end portion, and the lower end portion is formed. After inserting and supporting a rubber ring with an annular protrusion on the outer peripheral surface of the narrowed portion of the tubular metal fitting, push the push shaft from the lower end side into the branch port drilled in the fluid pipe. After press-fitting, the annular flange portion of the rubber ring comes into contact with the outer peripheral surface of the fluid pipe, and the annular flange portion of the mounting member comes into contact with the upper surface of the annular flange portion of the rubber ring. The small-diameter tubular portion is expanded so that the annular projection of the rubber ring comes into contact with the inner peripheral surface of the fluid pipe, and the expanded small-diameter tubular portion is held by the holding tubular body so that the small-diameter tubular portion of the tubular metal fitting is fixed. The outer diameter of the narrowed portion is almost the same as the outer diameter of the tubular fitting, and the outer diameter of the tip of the expanded portion is Characterized by greater than the diameter of the mouth.

According to a third aspect of the invention, there is provided a water faucet mounting method according to the second or third aspect of the invention.
A plurality of expanding slits are formed in the circumferential direction on the small-diameter tubular portion of the tubular fitting from the lower end surface of the expanding portion to the narrowing portion.

[0009]

With the above-mentioned method, the water faucet can be attached very easily by being pushed into the branch port of the fluid pipe by the pushing shaft. Further, the attached water faucet has a high sealing performance because the rubber ring is press-fitted into the tubular metal fitting to be in a tightly fitted state between the metal fitting and the edge of the branching port. Further, since the outer diameter of the tip of the expanded portion of the small-diameter tubular portion formed at the lower end of the tubular metal member is larger than the diameter of the branch port, it is strong against the force of withdrawal from the branch port.

[0010]

FIG. 1 is a vertical sectional front view showing a water pipe according to an embodiment of the present invention, in which a water tap is attached to a branch port of a fluid pipe. 1
Is a water faucet, which is a thin hollow metal fitting 2 having upper and lower end openings formed in an expanded portion 18 described below, and a rubber ring 4 fitted and attached to the outer circumference of the metal fitting 2. And a mounting nut 5 and the like fitted and fitted to the outer periphery of the tubular metal fitting 2 above the rubber ring 4. The tubular metal fitting 2 is made of a stainless steel pipe in this example. Reference numeral 6 denotes a ductile pipe as a fluid pipe, which is composed of a main pipe 7 and a cement mortar lining layer 8 lined on the inner surface thereof.
Reference numeral 9 denotes a branch port formed in the ductile tube 6. The inner surface of the expanded portion 18 of the tubular fitting 2 is formed into a convex curved surface so that the outer diameter of the tip of the expanded portion 18 is larger than that of the branch port 9, and the tip of the expanded portion 18 is located near the inner surface of the pipe 6. There is.

An outer annular flange portion 10 is formed at an upper end portion of the rubber ring 4 protruding from the branch opening 9, and an inward annular projection 11 is formed at a lower end portion facing the inner surface of the pipe 6 from the branch opening 9. I have. The mounting nut 5 has a hollow cylindrical shape with upper and lower openings larger in inner and outer diameters than the cylindrical metal fitting 2, and an inward annular flange portion 12 is provided at the lower end portion to abut on the upper surface of the flange portion 10 of the rubber ring 4. . The inner diameter of the flange portion 12 is slightly larger than the outer diameter of the cylindrical metal fitting 2. 13 is the mounting nut 5
This is a female thread for attaching the water stopcock 14 formed on the inner peripheral surface of the watertight stopcock.
Further, an outer annular flange portion 15 is provided on the upper end portion of the tubular fitting 2 so as to be mounted on and engaged with the upper surface of the flange portion 12 of the mounting nut 5.

The state before the branch plug 1 is attached is shown in FIG. As shown in the figure, before mounting, the lower end portion of the tubular metal fitting 2 has a conical tapered narrowing portion 17 formed by previously narrowing with a press or the like, and expands from the tip of the narrowing portion 17. Is formed in a small-diameter tubular portion 19 formed by an expanded portion 18 extending in the axial direction by a predetermined length and having an outer diameter c at its tip smaller than the outer diameter b of the tubular metal fitting 2. In addition, in FIG.
Of the rubber ring 4 is larger than the outer diameter e of the rubber ring 4, the outer diameter b of the tubular fitting 2 is larger than the inner diameter f of the rubber ring 4, and the inner diameter of the upper end opening of the rubber ring 4 is larger than the outer diameter b of the tubular fitting 2. It is slightly smaller and larger than the inner diameter f of the rubber ring 4. The outer diameter b of the tubular fitting 2 is smaller than the diameter a of the branch opening 9 and larger than the inner diameter d of the annular projection 11 of the rubber ring 4. The inner diameter d of the annular protrusion 11 of the rubber ring 4 is equal to or slightly larger than the outer diameter c of the tip of the expanding portion 18 of the tubular fitting 2. In FIG. 3, the state before attachment of the tubular metal fitting 2 is shown by a solid line, and the state after attachment is shown by a chain line. The outer diameter c'of the expanded portion 18 expanded after mounting is the outer diameter b of the tubular metal fitting 2, the inclination of the expanded portion 18 before mounting to the perpendicular is θ, and the expanded portion 18 before mounting. l ₁ the length between perpendiculars from each tip and the proximal end of,
When the actual length between the front end and the base end of the expanded portion 18 before attachment is l ₂ , it is calculated by the following equation.

[0013]

[Equation 1] c′≈b + 2 · l ₂ (l ₂ = l ₁ / sin θ)

FIG. 4 shows a method of pushing the branch plug 1 into the branch port 9 of the ductile pipe 6 to mount it, and at this time, a pushing shaft 21 as shown is used. The pushing shaft 21 has a tapered conical portion 22 formed at the lower end thereof, and is pushed in such that the outer peripheral surface thereof is in sliding contact with the inner peripheral surface of the tubular metal fitting 2. An annular groove 23 is formed on the outer peripheral surface above the conical portion 22 of the pushing shaft 21,
An O-ring 25 is arranged in the groove. The O-ring 25 serves to stop water when water pressure is applied to the inside of the pipe, and to prevent the tubular fitting 2 from falling when water pressure is not applied.

A method of attaching the water dip 1 to the branch port 9 of the ductile pipe 6 using the pushing shaft 21 as described above will be described below.

First, the tubular fitting 2 is inserted into the mounting nut 5 with the small-diameter tubular portion 19 facing down, and the flange portion 15 of the tubular fitting 2 is inserted.
Is mounted on the upper surface of the flange portion 12 of the mounting nut 5 so as to be engaged therewith, and the rubber ring 4 is pushed and mounted so as to cover the small diameter tubular portion 19 of the inserted tubular metal fitting 2 from below. Then, the mounting nut 5 and the tubular metal fitting 2 mounted as described above are attached to the lower end portion of the push-in shaft 21 forming a part of a mounting jig (not shown), and the inner peripheral surface of the tubular metal fitting 2 is the outer peripheral surface of the push-in shaft 21. The rubber ring 4 is slidably contacted with and is supported so that the inner peripheral surface of the narrowed portion 17 of the tubular metal fitting 2 abuts on the outer peripheral surface of the conical portion 22, and the rubber ring 4 is pressed by the narrowed portion 17 of the tubular metal fitting 2. Is fitted and supported so as to come into contact with the outer peripheral surface of the pipe, and in this state, the whole is brought over the branching port 9 of the pipe 6 and the rubber ring 4 is set in a state where it enters the branching port 9 of the ductile pipe 6 (Fig. 4A).

When the whole is continuously lowered after the set state, the body part of the rubber ring 4 is brought into a tightly fitted state with the edge of the branching port 9 by the tubular metal fitting 2, and the rubber ring is also made. Four
The flange portion 10 comes into contact with the outer peripheral surface of the ductile pipe 6, and the flange portion 12 of the mounting nut 5 comes into contact with the upper surface of the flange portion 10 of the rubber ring 4 (FIG. 4B). When the pushing shaft 21 is further pushed from this state, the conical portion 22 of the pushing shaft 21 gradually passes through the small diameter tubular portion 19 of the tubular fitting 2, and the outer peripheral surface above the conical portion is the small diameter tubular portion of the tubular fitting 2. The portion 19 slides so as to push it apart, whereby the small-diameter tubular portion 19 of the tubular fitting 2 is gradually opened. The lowering of the pushing shaft 21 causes the annular protrusion of the rubber ring 4 to
The position of 11 is reversed from the inward direction to the outward direction, and the rubber ring 4 is vertically compressed, which promotes the pressure-tight state between the tubular fitting 2 and the rim of the branching port 9, and by these, the tubular fitting A seal is maintained between the outer peripheral surface of 2 and the edge of the branch opening 9, and between the edge of the branch opening 9 and the rubber ring 4. And the conical part of the push shaft 21
When 22 has finished passing through the small diameter tube portion 19, the narrowing portion of the small diameter tube portion 19
The outer diameter of 17 is almost the same as the outer diameter of the tubular fitting 2, and the expanded portion is
The outer diameter of the tip of 18 becomes larger than the diameter of the branch port 9 (Fig. 4).
C).

FIG. 5 shows another embodiment. In this embodiment, an annular step portion 31 is formed at the base end of the conical portion 22 of the pushing shaft 21, and a rigid holding ring 32 made of metal or the like for holding the shape of the small diameter tubular portion 19 of the tubular metal fitting 2 after attachment is provided. It is engaged by fitting. In addition, a plurality of slits 33 for expanding are formed in the circumferential direction from the lower end surface of the expanding portion 18 to the narrowing portion 17 in the small-diameter cylindrical portion 19 of the tubular fitting 2, and in the tip portion of the narrowing portion 17. An annular groove 35 that engages with the retaining ring 32 during mounting is formed on the peripheral surface. The slit 33 may be formed before the small-diameter tubular portion 19 is formed in the tubular metal fitting 2, or may be formed after it is formed. Further, the tubular metal fitting 2 is formed to have a slightly larger wall thickness than that of the above embodiment.

In the above mounting, the retaining ring 32 is previously
Is engaged with the annular step portion 31, the mounting nut 5, the tubular metal fitting 2, and the rubber ring 4 are attached to the lower end portion and set as in the above embodiment, and then the whole including the pushing shaft 21 is lowered to lower the rubber. When the ring 4 is fitted into the branch port 9 of the ductile pipe 6 (FIG. 5A) and further lowered, the tubular metal fitting 2 causes the body of the rubber ring 4 to branch into the branch port 9.
Of the rubber ring 4 is pressed against the flange 12 of the mounting nut 5 and is pressed against the outer peripheral surface of the pipe 6 (Fig. 5).
B). Then, the pushing shaft 21 is pushed in to open the small diameter tubular portion 19 of the tubular fitting 2 through the slit 33 so that the annular projection 11 of the rubber ring 4 comes into contact with the inner peripheral surface of the ductile pipe 6, and The holding ring 32 engaged with the annular step portion 31 is fitted into the annular groove 35 of the tubular fitting 2 to hold the expanded small-diameter tubular portion 19 and squeeze the small-diameter tubular portion 19 of the tubular fitting 2. The outer diameter of the insertion portion 17 is substantially equal to the outer diameter of the tubular metal fitting 2, and the outer diameter of the tip of the expansion portion 3 is made larger than the diameter of the branch port 9 (FIG. 5).
C) and other points are the same as in the above-mentioned embodiment. In this example, since the slit 33 is formed in the small-diameter tubular portion 19, the pushing force of the pushing shaft 21 may be small and the pushing-out shaft 21 can be easily opened.

FIG. 6 shows another embodiment. In this embodiment, in place of the holding ring 32, there is provided a rigid holding cylinder body 37 which is fitted and arranged so as to be slidably contacted between the outer peripheral surface of the push shaft 21 and the inner peripheral surface of the tubular metal fitting 2. Further, a large diameter portion 39 capable of contacting an outward annular flange portion 38 provided at the upper end of the holding tubular body 37 on the pushing shaft 21 at a distance of at least the axial length of the tubular fitting 2 from the conical portion 22. Are formed. The tubular metal fitting 2 of this embodiment is not provided with the annular groove 35 as in the tubular metal fitting 2 of the embodiment of FIG. 5, and the push shaft 21 is not provided with the annular step portion 31. Although the holding cylinder 37 is provided with the annular flange portion 38 in this embodiment, the flange portion is not necessarily required.

In the above-mentioned mounting, first, a holding cylinder is previously prepared.
The fitting nut 5 and the tubular metal fitting 2 are fitted into the 37, and the rubber ring 4 is fitted so as to come into contact with the narrowing portion 17 of the small-diameter tubular portion 19 of the tubular metal fitting 2, and then the pushing shaft 21 is inserted into the holding tubular body 37. The large diameter portion 39 abuts on the flange portion 38 of the holding cylinder body 37, and the inner peripheral surface of the holding cylinder body 37 is fitted and supported so that the outer peripheral surface of the pushing shaft 21 makes sliding contact. Next, after mounting the mounting nut 5, the tubular metal fitting 2, and the rubber ring 4 on the lower end portion of the pushing shaft 21 as in the above-described embodiment and setting the same, the rubber ring 4 is lowered by including the pushing shaft 21. Fit into the branch port 9 of the ductile pipe 6 (Fig. 6A),
When it is further lowered, the body part of the rubber ring 4 is brought into a tightly fitted state with the edge of the branch port 9 by the tubular metal fitting 2, and the flange 10 of the rubber ring 4 contacts with the flange 12 of the mounting nut 5 and presses it. And contacts the outer peripheral surface of the pipe 6 in a compressed state (FIG. 6B). Then, the pushing shaft 21 is pushed in to open the small diameter tubular portion 19 of the tubular fitting 2 through the slit 33 so that the annular projection 11 of the rubber ring 4 comes into contact with the inner peripheral surface of the ductile pipe 6, and After the expanded small-diameter tubular portion 19 is expanded, the flange portion 38 is pressed by the large-diameter portion 39 and is further pushed by the holding tubular body 37 to hold the small-diameter tubular portion 19 of the tubular fitting 2 in the narrowing portion 17. The outer diameter is substantially the same as the outer diameter of the tubular metal fitting 2, and the outer diameter of the tip of the expanding portion 18 is made larger than the diameter of the branching port 9 (FIG. 6C). It is the same.

The above embodiment is also effective as a method of mounting the diversion plug 1 under uninterrupted water, in which case the mounting nut 5 is screwed onto the lower part of the water shutoff plug 14. Further, the mounting nut 5 and the tubular metal fitting 2 shown in the respective embodiments are merely examples, and the specific structure upon implementation can be variously changed in design without changing the gist of the present invention.

[0023]

Since the inventions of claims 1, 2 and 3 are as described above, there are the following excellent effects. (1) The water dip can be very easily attached to the branch port of the fluid pipe by the pushing shaft. (2) Since the tubular metal fitting is prevented from coming off due to the expanded portion of the lower-end small-diameter tubular portion whose outer diameter is larger than the diameter of the branch port after attachment, the water faucet is reliably prevented from coming off. (3) The tubular metal fitting is press-fitted into the rubber ring to press and close the rubber ring to the edge of the branch opening, and the rubber is provided between the annular flange portion at the upper end of the metal fitting and the expanded portion at the lower portion. Since the wheel is sandwiched and mounted in a sandwich shape, even if the water faucet is bent after installation due to an earthquake etc. and the ground is moved and lateral force is applied to the water faucet, the annular flange and rubber The elastic force of the inverted annular protrusion at the lower end of the ring absorbs the lateral force without difficulty,
It can be easily bent without damaging the rubber ring, and it does not deteriorate the water stopping function of the fluid.
Also, there is little risk of breakage of the water faucet. (4) The small diameter lower end of the tubular fitting presses the annular projection of the rubber ring against the inner surface of the pipe, so that even if the mortar lining inside the pipe, such as the ductile pipe, is broken or cracked during perforation, sufficient waterproofing is achieved. Can be held. (5) Even if chips and the like during drilling remain on the pipe top on the branch port, the tubular metal fitting is mounted straight by only being pressed by the annular flange portion of the rubber ring, and does not affect the consolidation of the rubber ring. Also, attach the water dip with the cutting chips in between,
After that, even if the chips fall off due to an earthquake or the like, it does not affect the sealing effect of the fluid, because it has nothing to do with the sealing mechanism by the rubber ring that is compacted at the edge of the branch opening by press fitting the tubular fitting.

According to the invention of claim 4, when the small diameter cylindrical portion is expanded at the time of mounting, it can be easily expanded and the pressing force of the pressing shaft can be small.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a water tap according to an embodiment of the present invention, which is attached to a branch port of a fluid pipe.

FIG. 2 is a longitudinal sectional front view before mounting showing a dimensional relationship between each part of a water faucet and a branch port.

FIG. 3 is an enlarged cross-sectional view of a tubular fitting.

4 (A), (B), and (C) are operation explanatory views showing a mounting method of the water faucet of FIG. 1.

FIG. 5 shows another embodiment of the water faucet, (A), (B),
(C) is an operation explanatory view showing the attachment method.

FIG. 6 is still another embodiment of the water faucet, (A),
(B), (C) is operation explanatory drawing which shows the attachment method.

FIG. 7 is a vertical cross-sectional front view of a conventional water dip plug installed in a branch port of a fluid pipe.

[Explanation of symbols]

 1 Faucet 2 Cylindrical metal fitting 4 Rubber ring 5 Mounting nut 6 Ductile pipe 9 Branch opening 17 Narrowing portion 18 Expanding portion 19 Small diameter tubular portion 21 Pushing shaft 22 Conical portion 32 Holding ring 37 Holding tubular body 39 Large diameter portion

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masanori Ohno 1-12-19 Kitahori, Nishi-ku, Osaka City, Osaka Prefecture Kurimoto Iron Works Co., Ltd. (56) References JP-A-1-261594 (JP, A)

Claims (4)

(57) [Claims] 1. A push shaft having a tapered conical portion formed at a lower end thereof, the push shaft having an upper end of a tubular metal fitting on an upper surface of an inward annular flange portion formed at a lower end of a tubular mounting member. The fitting and the mounting member on which the outward annular flange portion formed on the portion is engaged are slidably in contact with the outer peripheral surface of the pushing shaft, and the lower end portion of the tubular fitting is preliminarily pressed. A conical tapered constriction part formed by constricting with a taper, etc., and a predetermined length in the axial direction expanded from the tip of the constriction part so that the outer diameter of the tip is smaller than the outer diameter of the tubular metal fitting. The small-diameter cylindrical portion formed of the expanded portion is fitted and supported so that the inner peripheral surface of the narrowed portion abuts the outer peripheral surface of the conical portion, and an outer annular flange portion is formed at the upper end portion. A rubber ring having an annular projection at the lower end is brought into contact with the outer peripheral surface of the narrowed portion of the tubular metal fitting. After being inserted and supported as described above, the push shaft is pushed from the lower end side into the branch port formed in the fluid pipe and press-fitted, and the annular flange portion of the rubber ring is in contact with the outer peripheral surface of the fluid pipe and After the annular flange portion of the mounting member is in contact with the upper surface of the annular flange portion of, the small-diameter tubular portion of the tubular metal fitting is further pressed by the pushing shaft so that the annular protrusion of the rubber ring comes into contact with the inner peripheral surface of the fluid pipe. The method of mounting the water faucet is characterized in that the outer diameter of the narrowed portion is substantially equal to the outer diameter of the tubular metal fitting and the outer diameter of the tip of the widened portion is made larger than the diameter of the branch port. . 2. A pushing shaft having a tapered conical portion formed at a lower end portion thereof, and a retaining ring engaging annular step portion formed at a base end of the conical portion, and the pushing shaft engaging with the annular step portion of the pushing shaft. A pressing shaft having a retaining ring and a retaining ring engaged with the annular stepped portion, formed at the upper end of the tubular metal fitting on the upper surface of an inwardly facing annular flange formed at the lower end of the tubular mounting member. The metal fitting engaged with the outward annular flange is mounted on the mounting member, and the inner peripheral surface of the cylindrical metal fitting is in sliding contact with the outer peripheral surface of the pushing shaft, and the lower end of the cylindrical metal fitting is narrowed in advance by a press or the like. A conical tapered constriction formed and an expanding part extending in the axial direction from the tip of the constriction part for a predetermined length, and the outer diameter of the tip is smaller than the outer diameter of the tubular metal fitting. Of a small-diameter cylindrical portion that is formed of an open portion and that has an annular concave groove for engaging the retaining ring formed on the inner peripheral surface of the distal end portion of the narrowing portion. The inner peripheral surface of the narrowed portion is fitted and supported so as to come into contact with the outer peripheral surface of the conical portion, an outward annular flange portion is formed at the upper end portion, and an annular protruding portion is provided at the lower end portion. After the rubber ring is fitted and supported so as to come into contact with the outer peripheral surface of the narrowed portion of the tubular metal fitting, the push shaft is pushed from the lower end portion side into the branch port formed in the fluid pipe and press-fitted, After the annular flange portion of the rubber ring contacts the outer peripheral surface of the fluid pipe, and the annular flange portion of the mounting member contacts the upper surface of the annular flange portion of the rubber ring, the small-diameter tubular portion of the tubular metal fitting is further pushed by pushing the pushing shaft. Of the rubber ring so that the annular projection of the rubber ring contacts the inner peripheral surface of the fluid pipe, and the retaining ring engaged with the annular step is fitted into the annular recessed groove of the tubular metal member, and the expansion is performed. Hold the open small-diameter cylinder part and hold the small-diameter cylinder part of the tubular metal fitting Substantially equal, and the mounting method of diversion plug outer diameter of the distal end of the expansion portion is equal to or larger than the diameter of the branch port to the outer diameter of the Jo fittings. 3. A push-in shaft having a tapered conical portion formed at a lower end thereof, and a large-diameter portion formed at a distance from the conical portion which is at least the axial length of the tubular metal fitting, and the push-in shaft. A holding cylinder body fitted and arranged so as to be slidably contacted between the outer peripheral surface and the inner peripheral surface of the tubular metal member, and the lower end of the cylindrical mounting member is fitted to the pushing shaft fitted with the holding cylinder body on the outer peripheral surface. The inner peripheral surface of the tubular metal fitting holds the metal fitting and the mounting member engaged with the outer annular flange portion formed at the upper end of the tubular metal fitting on the upper surface of the inward annular flange portion Sliding contact with the outer peripheral surface of
Further, a conical tapered narrowing portion formed by previously narrowing it with a press or the like at the lower end portion of the tubular metal fitting and a predetermined length in the axial direction in an expanding manner from the tip of the narrowing portion While being fitted and supported so that the inner peripheral surface of the narrowed portion of the small-diameter cylindrical portion formed of the expanded portion whose outer diameter is smaller than the outer diameter of the tubular metal fitting contacts the outer peripheral surface of the conical portion, After the outer annular flange portion is formed on the upper end portion, and the rubber ring provided with the annular protrusion portion on the lower end portion is fitted and supported so as to abut the outer peripheral surface of the narrowed portion of the tubular metal fitting, The pushing shaft is pushed from the lower end side into a branch port formed in the fluid pipe and press-fitted, the annular flange portion of the rubber ring is in contact with the outer peripheral surface of the fluid pipe, and the mounting member is attached to the upper surface of the annular flange portion of the rubber ring. After contacting the annular flange of the The diameter cylindrical portion is expanded so that the annular protrusion of the rubber ring comes into contact with the inner peripheral surface of the fluid pipe, and the expanded small diameter cylindrical portion is held by the holding cylinder body so that the small diameter cylindrical portion of the tubular metal fitting is retained. A method of mounting a water faucet, wherein an outer diameter of the narrowing portion is substantially equal to an outer diameter of the tubular metal fitting, and an outer diameter of a tip of the expanding portion is larger than a diameter of the branch port. 4. The water faucet according to claim 2 or 3, wherein a plurality of expanding slits are formed in the circumferential direction from the lower end surface of the expanding portion to the narrowing portion in the small-diameter cylindrical portion of the tubular fitting. How to install.