JP3266890B2 - Replacement method of water pipe branch tap and apparatus used in the method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for replacing a branch tap in a water pipe and an apparatus suitable for use in carrying out the method.

[0002]

2. Description of the Related Art As a method for replacing a branch tap of a water pipe while keeping tap water available on the downstream side of the water pipe, that is, without tightening a main plug of the water pipe, Japanese Patent Publication No. 8-143.
According to No. 57, after tapping the peripheral wall of the branch opening at the existing branch tap with a tap, a screw member or an embedding member made of a relatively soft material is screwed or press-fitted into the screw portion of the opening. Plugging the branch opening, and further cutting and removing the existing branch plug, then drilling a new branch opening near the plug part of the water pipe and installing a new branch plug, etc.
Proposed.

[0003]

However, in the method of replacing a branch tap described in this publication, used taps are formed one after another in a water pipe. In addition, since the thermal characteristics and the distortion characteristics with respect to stress may be greatly different in the plug portion and the vicinity thereof, the plug portion may cause a new water leak.

[0004] The present invention has been made in view of the above points, and an object of the present invention is to use tap water at an existing branch tap while keeping tap water available downstream of a water pipe. Method for replacing a water pipe branch plug so that the new branch opening can be used with a new branch plug practically as it is, and the method
An object of the present invention is to provide a device suitable for using the device.

[0005]

According to the present invention, there is provided a method for replacing a branch tap of a water pipe according to the present invention, wherein a tap for threading and a tap at a base end side of the tap are provided. A threaded water-sealing rod provided at the bottom with a threaded water-sealing tool having a continuously formed male threaded portion and a branch penetration of the water pipe that communicates with the bottom inlet of the existing branch tap in the water pipe. The hole is temporarily sealed, and the existing tap is replaced with a new tap using the threaded water sealing tool as a positioning means.

[0006] In the replacement method of the branch tap of the water pipe of the present invention,
Since a threaded water-sealing rod having a threaded water-sealing tool having a threaded tap portion and a male thread portion continuously formed in the tap portion at the base end side of the tap portion is used at a lower portion, The tap of the threaded water sealing rod of the threaded water sealing rod is threaded into the peripheral wall of the branch through-hole of the water pipe connected to the bottom inlet of the existing branch tap, following the threading,
By threading a male thread continuously connected to the tap of the threaded water sealing tool into the female thread formed by the threading, a through-hole for branching the water pipe at the existing branch tap. Can be temporarily sealed (temporarily sealed) or temporarily sealed with water.

[0007] In the state where the through hole for branching is temporarily sealed by the male screw portion of the threaded water sealing tool in this way, the threaded water sealing tool pierced by the male screw portion into the through hole for branching is a water pipe. Of the existing branch tap and extends upward through the bottom inlet of the existing branch tap, so that the existing branch tap is removed (that is, removed) along with the threaded water seal and a new branch tap is inserted. By fitting the bottom inlet and the like into the threaded water sealing tool and arranging it in the water pipe along the threaded water sealing tool, the bottom inlet of the branch tap can be temporarily sealed with the threaded water sealing tool for branching. A new branch tap can be placed at substantially the same location as the original branch tap just facing the through hole and attached (ie, installed) to the water pipe. That is, the existing water tap can be replaced with a new water tap using the threaded water sealing tool as the positioning means. When the replacement is completed, unscrew the threaded water sealing tool to release the temporary sealing water (temporary sealing), remove the threaded water sealing tool, and open and close the branch tap as desired. Just change it.

Accordingly, in the method for replacing a branch tap of a water pipe according to the present invention, the branch through hole originally formed in the pipe wall of the water pipe is actually used as it is (in practice, at least,
The diameter can be enlarged by the amount of the thread cut by the threaded water sealing tool), and the existing tap can be replaced with a new tap. As a result, the branch tap can be replaced with minimal damage to the water pipe. Further, since the branch tap can be attached to the same position as the original one, the change in connection with the branch pipe can be minimized.

A branch tap (also referred to as a water tap) is typically of a so-called saddle type, and the saddle is held between at least a pair of saddles in the form of a band attached to the branch tap body so as to hold the water pipe therebetween. The part is attached to the water pipe by attaching it to the peripheral wall of the water pipe. However, in some cases,
Other types of taps may be used. In the saddle type stopcock, typically, a seal member for sealing the inflow port and the pipe wall of the water pipe in a watertight manner is arranged at a lower end opening of the bottom inflow port. However, some branch taps are provided with a bottom inlet in the form of a pipe at the lower end, and a male thread at the lower end of the pipe is screwed to the pipe wall of the water pipe. In such a case,
At the time of threading with the tap part of the threaded water sealing tool, while removing the entire threaded tube part for the bottom inlet of the existing branch tap,
A female screw may be formed on the pipe wall of the water pipe. If desired, before threading, in order to practically remove the entire threaded tube portion for the bottom inlet of the existing branch tap, the diameter is increased by a drill of a drilling machine for drilling a branch opening. You may leave.

The method for replacing a branch tap of a water pipe according to the present invention typically achieves the above-mentioned object by water-tightly connecting a branch through hole formed in a pipe wall of the water pipe at a bottom inlet. A tap opening for threading and a tap end at the base end side of the tap portion are formed continuously at the top opening which is actually linearly connected to the bottom inflow port of the existing branch tap connected to the tap. Attach the lower end of the cylindrical device body outside the threaded water sealing device having a threaded water sealing rod having a male threaded portion and having a threaded water sealing rod at the lower part movably in the vertical direction,
Open the valve that shuts off the communication between the bottom inlet and the top opening of the spigot until the threaded water sealing tool passes through the top opening and the bottom inlet of the spigot and faces the through hole for branch of the water pipe. After lowering the threaded water sealing rod and forming a female thread portion on the peripheral wall of the branch through hole of the water pipe with the tap part of the threaded water sealing tool, the threaded water sealing rod is further advanced downward to seal the threaded water sealing rod. By screwing the male screw part of the water fitting into the female screw part of the water pipe, the through hole for branching of the water pipe is temporarily sealed, and the threaded water sealing tool is screwed into the pipe wall of the water pipe. In a protruding state, the tubular device body of the threaded water sealing device is pulled out from the upper end side of the threaded water sealing device, and further, the fixing of the existing branch cock to the water pipe is released, and the branch cock is threaded and sealed. Pull out from the top end of the water fitting, and the top end of the threaded water sealing tool is the bottom inlet and top opening of the new branch tap. Fit the new branch tap into the threaded water seal so as to penetrate it, lower it to the mounting position on the water pipe, fix the new branch tap on the pipe wall of the water pipe, and form the cylindrical shape of the threaded water sealing device. After fitting the device body to the threaded water sealing rod and attaching the lower end of the tubular device body to the top opening of the new branch tap, the male threaded part of the threaded water sealing tool and the female threaded part of the water pipe are connected. The threaded water sealing rod is retracted to release the screw engagement, the temporary sealing of the water pipe branch through hole by the threaded water sealing tool is released, and the tap at the lower end of the threaded water sealing tool is a branch plug. After pulling up the threaded sealing rod until it is above the valve, the valve of the tap is closed and the threaded water sealing device is removed from the tap.

Although the cylindrical device body, that is, the outer cylindrical body forming the device body, may be a single cylinder or a cylinder, the drilling operation of the branching opening (a new hole) by a drilling machine (piercing drill). In order to be able to use it together with a lower cylinder attached at the lower end to the top opening of the branch tap, and screwed to the outer periphery of the lower cylinder, It is preferable to have an upper cylindrical body. in this case,
When a new stopcock is used which is considerably larger than the existing stopcock (having a large diameter), after replacing with a new stopcock, for example, a perforated sealing rod including a supporting rod and a perforated sealing tool is used. Alternatively, a drill rod with a piercing drill including a supporting rod and a piercing drill may be attached to the apparatus body, and the apparatus body may be attached to the top opening of the branch tap so that the diameter is increased by the piercing drill. Also in this case, the branch opening of the water pipe and the drill can be accurately and concentrically arranged, so that the diameter can be reliably expanded by the drill. In addition, even if the device main body is just fitted to the threaded water sealing rod to support the rod slidably, it is loosely fitted to form a chamber inside. You may.

Although the threaded sealing rod may be an integral body with a threaded closure at the bottom, it is typically connected to the threaded closure at the lower end to the upper end of the closure. And a supporting rod. Threaded water sealing rods typically have a large diameter portion and a small diameter portion, although they may have a substantially constant diameter over their entire length. In particular, when the threaded watertight device and the support rod are provided separately, the threaded watertight device is connected to the large-diameter portion of the support rod or the large-diameter support rod. When a large-diameter portion and a small-diameter portion are provided, the large-diameter portion may be insertable in the vertical direction of the tubular device main body, but the large-diameter portion can be inserted and removed only from the lower end of the tubular device main body. There may be. The diameter of the perforated closure is typically selected to be about the same as the diameter of the top opening of the stopcock, but can be considerably smaller if desired, than the diameter of the top opening.

The threaded water sealing device according to the present invention, which is suitable for use in the above-described method for replacing a water pipe branch tap, is provided with a water-tight seal at a bottom inlet into a branch through hole formed in the pipe wall of the water pipe. A tubular device main body, which is configured to be attached at its lower end to a top opening that is actually linearly connected to the bottom inlet of the existing branch tap connected to the main body, and moves in the axial direction of the cylindrical device body. A threaded water sealing device, which is inserted into the tubular device body as possible and has a tap portion for threading and a male thread portion continuously formed on the tap portion on the base end side of the tap portion, And a threaded sealing rod.

Further, the threaded water sealing device of the present invention suitable for use in the above-mentioned method for replacing a water pipe branch tap has a tap portion for threading and a tap at a base end side of the tap portion. And a male screw portion continuously formed in the portion.

[0015] The tap portion is provided with a groove for chip discharge over substantially its entire length. The groove, not extend to a part of the portion continuously connected to the tap portion of the male threaded portion
You . In the latter case, the length of the groove in the male screw portion is typically, for example, about the thickness of a pipe wall of a water pipe in which a branch opening to be cut is formed. However, as long as the external thread portion can have a portion without a groove over a length of about the thickness of the pipe wall of the water pipe, the groove extends over a longer range.
But it may also extend to the male threaded portion.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described based on a preferred embodiment shown in the accompanying drawings.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing a preferred embodiment of a threaded water sealing device 1 for use in a method of replacing a water pipe branch tap according to a preferred embodiment of the present invention with reference to FIG. Based on (a) and (b), an outline of a saddle type branch tap or water tap 3 to be attached to the water pipe 2 and to be replaced by the threaded water sealing device 1 will be described.

In FIG. 2, the saddle type water tap 3 includes a water tap main body (branch tap main body) 60 and a saddle type mounting portion 80 for fixing the water tap main body 60 to the water pipe 2. The saddle-type mounting portion 80 includes upper and lower saddle members 83 and 84 having arcuate contact surfaces 81 and 82 (see also FIG. 3) that match the outer peripheral surface 92 of the pipe wall 91 of the water pipe 2. A fastening member 87 such as a bolt 85 and a nut 86 for connecting the saddle members 83 and 84 to fix the saddle members 83 and 84 to the pipe wall 91 of the water pipe 2 is provided. The shapes of the saddle members 83 and 84 and the manner of fixing the water pipe 2 to the pipe wall 91 may be different. For example, the two saddle members 83 and 84 may be connected by a hinge or the like.

The upper saddle member 83 is provided at the bottom inlet pipe portion 6 for defining the bottom inlet port 61 of the water faucet body 60 facing and communicating with the branching opening 93 formed in the pipe wall 91 of the water pipe 2.
2, the branch opening 93 and the bottom inlet 61.
Is provided with a seal ring 94 for preventing water leakage.

The diversion plug body 60, in addition to the bottom inlet port 61, the branch outlet piping to homes, etc. 4 is connected 6
3 and a vertical hole as a top opening into which a drill of a drilling machine for drilling a branching opening 93 in the pipe wall 91 of the water pipe 2 via the bottom inlet 61 when the water faucet 3 is attached. 6
4 and the bottom inlets 61 and their openings or holes 6
The communication between 3 and 64 is interrupted by a valve body 65 in the form of a hollow ball valve. The diameter of the vertical hole such as the top opening 64 and the bottom inlet 61 of the water faucet main body 60 is larger than the diameter of the branch opening 93 of the water pipe 2 so as to allow the vertical direction U and D of the drill to enter and exit. large. Valve or ball valve 65
Is connected to a shaft 67 having an opening / closing control end 66 having two side surfaces projecting from the side wall of the branch cock main body 60 and having two sides parallel to the protruding end, and turning the opening / closing control section end 66 in the A direction with a wrench or the like. , The turning position or the open / close state of the ball valve 65 can be controlled and changed. In addition, the top opening 64 is provided with the lid attaching portion 6.
8 is normally closed by a cap or lid 70 screwed to a male screw portion 68a on the outer periphery of the screw 8 with a female screw portion 69. The branch opening 93 is coaxial or concentric with the male screw portion 68 a of the lid mounting portion 68 in view of the manner or history of drilling the branch opening 93 of the water pipe 2. 71 is a seal packing, and 72 and 73 are openings 74, 75 and 76.
Supports the rotation of the hollow ball valve 65 provided in the peripheral wall 77 in the direction A, and cooperates with the ball valve 65 to open the inflow port 61 through the opening 6.
It is a valve seat member that communicates with and shuts off 3, 64.

Returning to FIG. 1, the threaded water sealing device 1 comprises a cylindrical and rigid threaded water sealing device main body 10 and a main body 10.
And a threaded water-sealing rod structure 30 which is inserted into the main body 10 so as to be movable in the vertical directions U and D, and is separable from the main body 10.

The main body 10 of the threaded water sealing device has a rigid base portion 11 mounted on the lid mounting portion 68 of the water faucet 3 and a rigid inner cylinder portion 12 fixed to the base portion 11. And a rigid upper cylinder 16 having a rigid outer cylinder 14 and a rigid lid 15 screwed to the inner cylinder 12 of the lower cylinder 13.

The base portion 11 of the lower cylindrical body 13 has concentric concave portions 17, 18 on the upper and lower sides and upper and lower concave portions 17, 18.
And a concentric through-hole or opening 19 connecting them. Recess 1
Female thread portions 17a, 18a are formed on the peripheral walls of 7, 18 and are screwed to the male thread portion 68a of the lid mounting portion 68 of the water faucet 3 with the female thread portion 18a (FIG. 3 and the like). The inner cylinder 12 is
A male screw part 12a is provided on the outer peripheral surface, and a flange part 20 is provided at the lower end in a radially outward direction. The male screw part 20a on the outer periphery of the flange part 20 is screwed to the female screw part 17a of the base part 11. Flange part 20 and base part 1 of inner cylinder part 12
A chip discharge hole 13a is formed penetrating the hole 1 in the radial direction, and a stopper or a valve 13b for opening and closing the hole 13a is provided at an outlet of the hole 13a. The hole 13 a may be formed in the base 11 at the opening 19 without the flange 20. The contact surface between the base 11 and the inner cylinder 12 may be sealed with a seal ring or the like, or the base 11 and the inner cylinder 12 may be integrally formed. Good.

The outer cylindrical portion 14 of the upper cylindrical body 16 includes a rigid cylindrical outer cylindrical portion main body 21, an annular flange portion 22 integrally formed on the upper end of the main body 21 and facing inward in the radial direction, and a concentric annular shape. It has a thick part or a thick part 23. Upper cylinder 16
The outer cylindrical portion 14 has a female screw portion 21a on at least a part of the inner peripheral surface of the outer cylindrical main body portion 21 and has a male screw portion 23a on the outer periphery of the thickened portion 23 whose diameter is increased at the upper end. Male screw part 12a of inner cylinder part 12 of lower cylinder body 13 with screw part 21a
Is screwed into. The diameter of the hole 22a of the annular flange portion 22 is, for example, approximately the same as the diameter of the hole 19 of the base portion 11.
However, if desired, the diameter of the hole 22a may be smaller than the diameter of the hole 19, for example, smaller than the diameter of the large-diameter cylindrical portion 41 of the support rod 34 described later. A pair of handles or levers 24, 24 are mounted on the outer periphery of the outer cylinder main body 21 via lever mounting parts 24a, 24a so as to be rotatable in the B1 and B2 directions. The levers 24, 24 are tilted horizontally in the B1 direction around the hinged joints of the mounting portions 24a, 24a, and the torque in the C1, C2 direction around the central axis C of the apparatus body 10 is applied to at least one of the levers 24, 24. With this addition, the outer cylinder main body 21 can be moved in the vertical directions U and D with respect to the inner cylinder 12. A plurality of packings 26 and a packing presser 27 are disposed in an annular chamber 25 formed by the annular thick part 23 and the annular flange part 22 of the outer cylinder part 14. The lid body 15 composed of the annular flat plate portion 28 and the cylindrical portion 29 is provided with a female screw portion 29 a on the inner peripheral surface of the cylindrical portion 29, and the male screw portion 29 a of the annular thick portion 23 of the outer cylindrical portion 14 is formed by the female screw portion 29 a. Screw part 23a
To make the hole 22 a roughly or roughly sealed by the packing 26 and to be fixed to the outer cylinder portion 14. The outer diameter of the thick annular portion 23 may correspond to the outer diameter of the outer cylinder body 21.

The threaded water-sealing rod structure 30 comprises a rigid threaded water-sealing tool 31 and a proximal end 3 of the threaded water-sealing tool 31.
Rigid support rod 34 connected and fixed to tip 2 at tip 33
And The threaded water sealing tool 31 has a threaded tap portion 36 in the distal end region of the distal end portion 35 and extends continuously from the base end of the tap portion 36 and has the same pitch as the pitch of the tap portion 36. It has a part 37. 38 is
This is a chip ejection groove formed over the entire length of the tap portion 36. Four grooves 38 are formed at intervals in the circumferential direction (FIG. 1B). However, the number of grooves 38 may be three or less or five or more. The threaded water sealing tool 31 includes a male screw portion 39 at the base end portion 32 and a prismatic portion 40 for applying a screwing torque at the distal end side of the base end portion 32.

The support rod 34 has a rigid, large-diameter lower cylindrical portion 41 at the lower portion, and a rigid, small-diameter upper cylindrical portion 42 extending continuously upward from the upper end of the large-diameter cylindrical portion 41. And a rigid prismatic portion 43 for applying a threading torque is formed continuously at the upper end of the small-diameter cylindrical portion 42.

The lower end surface of the large-diameter cylindrical portion 41 has a female screw 4
4a is formed with a female screw portion 44a.
, And is firmly screwed into the male screw portion 39 of the base end portion 32 of the threaded water sealing tool 31. Note that the outer diameter of the large-diameter cylindrical portion 41 is larger than the diameter of the hole 19 of the base portion 11 of the lower cylindrical body 13 and the diameter of the hole 22 a of the annular inward flange portion 22 of the upper cylindrical body 16. In a state in which the lid 15 of the upper cylindrical body 16 is detached from the outer cylindrical part 14, the lid 15 can be removed upward from the threaded water sealing device main body 10. However, if desired, the outer diameter of the large-diameter cylindrical portion 41 may be larger than the diameter of the hole of the annular inward flange portion 22 of the upper cylindrical body 16.

The small-diameter cylindrical portion 42 has through holes 45 and 46 for mounting stoppers. The stopper 50 is formed of, for example, an annular disc-shaped body having a through-hole 51 extending along a diameter. By
It is attached to the through-hole 45 or 46 of the small-diameter cylindrical portion 42 to define the limit of the penetration of the threaded water-sealing rod structure 30 into the threaded water-sealing device body 10 in the D direction. For example, as shown in FIG. 1, when the stopper 50 is attached to the upper through hole 46,
Is sufficiently lowered in the direction D with respect to the lower cylindrical body 13 (for example, FIG. 5), the male thread portion 3 of the threaded water sealing tool 31 is provided.
The position of the through hole 46 is selected so that the hole 7 can be securely engaged with the entire hole 93 of the upper peripheral wall 95 of the water pipe 2. On the other hand, when the stopper 50 is attached to the lower through hole 45, in a state where the upper cylinder 16 is sufficiently raised in the U direction with respect to the lower cylinder 13 (for example, FIG. 3),
The through-hole 45 is formed so that the tip of the tap portion 36 of the threaded water sealing device is located above the ball valve body 65 without fail to reliably allow the hollow ball valve 65 of the branch tap 3 to close the branch tap 3. Is selected. The lower cylinder 13
A mark may be provided on the threaded portion of the lower cylinder 13 so that the threaded engagement position of the upper cylinder 16 with respect to the vertical direction U, D can be visually recognized.

A torque lever or handle 55 such as a tapping screwdriver having a rectangular hole 54 complementary to the prismatic portion 43 is detached from the prismatic portion 43 at the upper end of the threaded water sealing rod structure 30. The lever 55 is rotated in the C2 or C1 direction to cut a required torque to cut off the thread. It may be added to the rod structure 30.

Next, a method of replacing the branch tap (water tap) 3 by using the threaded water sealing device 1 configured as described above will be described with reference to FIGS.

First, a hole is cut in a road or the like to expose the branch tap 3 to be replaced and the water pipe 2 to which the branch tap 3 is attached, and the cock 66 at the tip of the shaft 67 of the branch tap 3 is turned. As shown in FIG. 3, the inflow port 61 of the branch tap 3 is closed by the ball valve 65, the branch pipe 4 for general household use is removed from the opening of the branch hole 63, and the opening 5 is covered with the lid 5. When the lid 5 has the same size as the lid 70, the lid 70 may be removed and the lid 70 may be placed over the opening of the hole 63. If desired, the branch pipe 4 may be kept connected to the branch plug 3 until the branch plug 3 is removed (until the state of FIG. 6).

On the other hand, regarding the threaded water sealing device 1, the threaded water sealing device body 10 and the threaded water sealing rod structure 3
In a state where 0 is separated, first, the threaded water sealing rod structure 30 is assembled. That is, using a wrench or the like, the proximal end 32 of the
The stopper 50 is fixed to the small-diameter cylindrical portion 42 by the locking pin 52 so that the threaded watertight rod structure 30 is in the retracted position while being screwed firmly into the hole 44 at the tip of the large-diameter cylindrical portion 41. Attach it to the lower hole 45. The packing 26, the packing presser 27, and the lid 15 are fitted to the support rod 34 from the small-diameter end side, for example, before attaching the threaded water seal 31 to the support rod 34. About the threaded water sealing device main body 10,
Turn the levers 24, 24 so that the total length is longer,
The upper cylinder 16 is pulled up in the U direction with respect to the lower cylinder 13.

Next, the threaded water sealing rod structure 30 is inserted into the threaded water sealing device main body 10 from the tip (lower end), the packing 26 and the packing presser 27 are arranged in the concave portion 25 of the device main body 10, and the lid is closed. 28 is screwed into the annular thick portion 23 at the upper end of the apparatus main body 10. When the diameter of the large-diameter portion 41 of the support rod 34 is larger than the diameter of the hole 22a, the small-diameter portion 41 of the support rod 34 of the water-sealing rod structure 30 is inserted into the hole 22a from below, and then the packing 26 and the like are used. Then, the lid 15 may be fitted to the protruding portion of the small diameter portion 42 and the lid 15 may be screwed to the annular thick portion 23. Thereby, the hole 22a of the annular flange portion 22 is substantially sealed, and the small-diameter cylindrical portion 42 of the support rod 34 of the threaded water sealing rod structure 30 and the annular flange portion 22
Is almost sealed. In this way, in the state where the thread water sealing device 1 is assembled, the thread water sealing device 31 is used.
The tap portion 36 is typically, as shown in FIG.
It is located on the inner side (upper or lower in FIG. 3) than the end face of the base 11 of the apparatus body 10. Of course, after the above-described assembly of the thread water sealing device 1 is completed, the ball valve 65
The inlet 61 of the branch tap 3 may be closed.

Next, the cap 70 of the branch tap 3 is removed, and the base portion 11 of the water sealing and sealing device 1 is screwed to the male screw portion 68a of the lid attaching portion 68 with the female screw portion 18a of the concave portion 18. Thus, not only does the center axis C of the threaded water sealing rod structure 30 of the threaded water sealing device 1 coincide with the center axis of the holes 64, 61 of the branch tap 3, but also the branch opening 93 of the water pipe 2.
Also coincides with the central axis of.

When attachment of the thread water sealing device 1 to the branch tap 3 is completed, the open / close control end 66 of the branch tap 3 is turned with a wrench or the like to return the ball valve 65 to the open position. At this time, the water that has entered the water sealing device 1 from the inflow port 61 is almost stopped at the upper packing 26.

Next, the stopper 50 on the upper part of the threaded water sealing rod structure 30 is replaced with the upper hole 46,
The threaded water-sealing rod structure 30 can be inserted deep down, and the lever 24,
24 is tilted to a horizontal position where, for example, the end surfaces 24b, 24b (FIG. 4) hit the outer peripheral surface 14a of the cylindrical portion 14 of the upper cylindrical body 16, and the levers 24, 24 are lightly rotated in the C2 direction to rotate the upper cylindrical body 16 The lower cylinder 13 is lowered in the direction D to a position as shown in FIG. As a result, the threaded water-sealing rod structure 30 almost connected to the upper cylindrical body 16 at the packing 26 is also lowered in the D direction, and the tap portion 36 of the threaded water-sealing tool 31 of the threaded water-sealing rod structure 30.
Of the water pipe 3 passes through the upper and lower holes 64 of the spigot main body 60, the hollow portion of the ball valve 65, and the inflow hole (lower upper and lower holes) 61 of the spigot main body 60. It fits into the branch opening 93 and reaches a position where the peripheral surface of the tap portion 36 contacts the peripheral wall of the branch opening 93.

When the threaded rod structure 30 does not descend following the upper cylindrical body 16, the rod structure 3
The lever 55 is fitted to the prism 43 at the upper end of the cylinder 0, and if necessary, it may be slightly pushed down in the direction D while turning it in the direction C2 if necessary. The threaded water sealing rod structure 30 may be lowered in advance in the D direction until the lower end surface 50a contacts the upper surface of the lid 15 of the apparatus main body 10.

Next, the plug 13b of the chip discharge hole 13a of the apparatus main body 10 is opened to enable the discharge of the chips, and the lever 55 is attached to the rectangular column 43 at the upper end of the threaded water sealing rod structure 30. , While applying a pressing force in the D direction,
5 is turned in the C2 direction, and the tapping portion 36 of the threaded water sealing tool 31 starts threading the branch opening, that is, the peripheral wall of the hole 93 (FIG. 4). The stopper 13b is connected to the upper cylinder 1
Even if it is opened before lowering 6, the opening degree of the stopper or valve 13b may be increased at the start of threading. The chips or chips generated with the progress of the thread cutting work together with the tap water slightly entering due to the water pressure in the water pipe 2 and the groove 3 of the tap portion 36.
8 and is discharged upward together with tap water from the chip discharge hole 13a. At this time, the diameter (minimum diameter) of the thread of the female screw portion formed on the peripheral wall of the branch opening (hole) 93 of the water pipe 2 is substantially the same as the diameter of the hole 93 or the diameter of the hole 9.
3 is slightly larger than the diameter.

With the movement of the tap portion 36 in the direction D, the peripheral wall portion where the threading by the tap portion 36 is completed is screwed with the male thread portion 37 of the threaded water sealing tool 31.
When the thread cutting to the lower end of the peripheral wall of the hole 93 is completed,
A female screw portion is formed over the entire length of the peripheral wall, and the female screw portion is screwed with the male screw portion 37 over the entire length. Such a screwed state can be sensed as a decrease in resistance to the rotation of the lever 55 in the C2 direction. Such a screwed state is shown in FIG. Note that lever 5
5 is further rotated in the C2 direction to lower the threaded water sealing rod structure 30 in the D direction.
a is in contact with the upper surface 28a of the flat plate portion 28 of the lid 15 and further displacement in the D direction is prohibited, and the threaded water sealing tool 31 is prevented from being displaced in the D direction beyond the male screw portion 37. obtain.

When the male screw portion 37 is screwed into the female screw portion of the hole 93, the hole 93 is almost closed, and the hole 93 is further closed.
When a female screw portion is formed on the entire length of the screw member and screwed with the male screw portion 37, the hole 93 is almost sealed by the screwed portion.
In addition, as long as the hole 93 is actually sealed, the entire length of the hole 93 does not have to be screwed into the male screw portion 37.
Since the degree of sealing becomes higher as the region screwed with the male screw portion 37 in the thickness direction becomes longer, it is preferable that the hole 93 be screwed with the male screw portion 37 in the region as long as possible in the thickness direction. . Further, in order to ensure that chips can be discharged through the groove 38 of the threaded water sealing tool 31 until the lower end of the hole 93 is completely threaded, the groove 38 is formed at least in the pipe of the water pipe 2. It is preferable that only the thickness of the wall 91 extends below the male screw portion 37. In this case, in order to perform sealing or water sealing as securely as possible, the threaded water sealing tool 31 is screwed in until the portion of the male screw portion 37 without the groove 38 is screwed over the entire length of the hole 93. Preferably. However, as long as water leakage can be practically avoided, the groove 38 may be left in the lower portion of the screw portion.

When the temporary sealing of the hole 93 by the thread water sealing tool 31 is completed and, for example, the state as shown in FIG. 5 is reached, the thread water sealing device body 10 is then removed. That is, first, the lever 55 is detached from the upper end 43a of the prismatic portion 43 of the threaded watertight rod structure 30 and the engagement pin 52 is removed, and then the annular disc-shaped stopper 50 is moved to the upper end of the threaded watertight rod structure 30. Remove from 43a. Further, after the screwing of the base portion 11 of the threaded water sealing device body 10 to the lid mounting portion 68 of the branch tap 3 is released, the device body 10 is lifted in the U direction along the threaded water sealing rod structure 30. And pull it out from the upper end 43a of the threaded watertight rod structure 30. When the packing 26 is relatively strongly frictionally engaged with the small-diameter cylindrical portion 42 of the support rod 34, if desired, the thick annular portion (thick annular portion) of the upper cylindrical body 16 of the apparatus main body 10. The lid 15 of the upper cylindrical body 16 with respect to 23 is unscrewed to weaken or actually release the frictional engagement between the packing 26 and the small-diameter cylindrical portion 42 of the threaded watertight rod structure 30. Good.

When the apparatus main body 10 is detached, the support rod 34 of the threaded rod structure 30 is
It may be removed together with 0. In this case, the stopper 50 is kept in contact with the upper surface of the lid 15 of the main body 10 with the stopper 50 fixed to the support rod 34 with the pin 52, and the support rod 34 is rotated together with the main body 10 in the C1 direction.

FIG. 6 shows a state in which the main body 10 of the water sealing device is removed by the above-described procedure. In this state, as described above, since the male screw portion 37 of the threaded water sealing tool 31 of the threaded water sealing rod structure 30 is screwed into the female screw portion of the hole 93, the hole 93 is practically almost Since it is sealed, there is little or very little water leakage from the hole 93, and it does not hinder the replacement work of the branch tap 3.

Next, the support rod 34 is disengaged from the male screw portion 39 of the proximal end portion 32 of the threaded water sealing tool 31 of the threaded water sealing rod structure 30, and the support rod 34 is removed. When the outer diameter of the large-diameter cylindrical portion 41 of the support rod 34 is smaller than the diameter of the vertical hole formed by the holes 64 and 61 of the branch tap 3, there is no need to remove the support rod 34. In this case, the support rod 34 and the threaded water sealing tool 3
The threaded water-sealing rod structure 30 made of 1 may be an integral body.

Next, the branch tap 3 is removed (removed). That is, after removing the bolt 85 and the nut 86, and further removing the saddle member 84 from the pipe wall of the water pipe 2, the part of the branch tap 3 including the saddle member 83 is moved in the U direction along the threaded water sealing tool 31. And remove it from the upper end of the base end 32 of the threaded water sealing tool 31. In the case where the diameter of the holes 64 and 61 of the branch tap 3 is larger than the diameter of the large-diameter cylindrical portion 41 of the support rod 34 and the support rod 34 is kept connected to the threaded water sealing tool 31. Then, the branch tap 3 is pulled out from the upper end 43a of the prismatic portion 43 of the support rod 34 shown by the imaginary line in FIG. If the pipe 4 for home use has not been removed, the pipe 4 is removed from the outlet of the branch outflow hole 63 before removing the branch tap 3.

With the branch tap 3 removed as described above, as shown in FIG. 7, the male thread 37 of the threaded water sealing tool 31 is inserted into the female thread of the hole 93 of the water pipe 2. The hole 93 is practically almost completely sealed or sealed by the screwing of the portion of the male screw portion 37 without the groove 38 and the female screw portion of the hole 93.

When the water pipe 2 is exposed, it is preferable to remove a stain such as rust generated by installing the branch tap 3 for a long period of time from the surface of the water pipe 2 and then install a new branch tap.
The new branch tap 3 may be the same size as the original branch tap 3 or may be larger. However, a saddle portion having a size corresponding to the outer diameter of the water pipe 2 is used. When the branch tap 3 is replaced with a larger one, the tap portion 36 of the threaded sealing tool 31 has a size and shape such that the diameter of the hole 93 can be slightly increased when the hole 93 is threaded. You may leave it.

When a new branch tap 3 is installed, the lid 70 of the top opening 64 of the branch tap 3 is removed, and the lid 5 is connected to the branch outlet 63.
In addition, the ball valve 65 is set to the open position and the holes 64 and 61 are communicated with each other, and the inlet or the side of the hole 61 is loosely fitted from the upper end of the proximal end portion 32 of the threaded water sealing tool 31. Then, it is fitted into the threaded water sealing tool 31 in the order of the holes 61 and 64, and is lowered until the upper saddle portion 83 of the branch tap 3 hits the upper side wall portion 95 of the water pipe 2. Upper saddle part 8 of stopcock 3
When the lower portion 3 is fitted to the water pipe 2, the upper and lower saddle portions 83, 84 are disposed so as to be sandwiched along the circumferential direction of the water pipe 2, so that the upper and lower saddle portions 83, 84 are arranged around the axis C of the threaded water sealing tool 31. Adjust the turning position of the branch tap 3 to adjust the bolt 8
Loosely temporarily fix the branch tap 3 with the nut 5 and the nut 86 (substantially,
Return to the state of FIG. 6). The diameter of the main body 31a of the threaded water sealing tool 31 is made to be substantially equal to the diameter of the hole 64 of the new branch plug 3 so that the new branch plug 3 is formed.
Can be aligned with the branching opening or hole 93 of the water pipe 2 simply by fitting the branch plug 3 into the threaded water sealing tool 31. In this case, if desired, an annular auxiliary tool having a hole having a diameter substantially corresponding to the diameter of the main body 31a of the threaded water sealing tool 31 is mounted on the lid mounting portion 68 of the branch tap 3 for alignment. It may be.

When the support rod 34 has been removed, the support rod 34 is screwed to the base end portion 32 of the threaded water sealing tool 31 to form a threaded water sealing rod structure 30. After loosening the screw of the lid 15 of the water sealing device main body 10 to the annular thick portion 23 (in some cases, removing the lid 15 and the packings 26 and 27), the device main body 10
From the side of the base 11, the prismatic portion 43 of the rod structure 30.
And the whole body 10 is lowered in a loosely fitted state along the rod structure 30, and the female screw portion 18 of the concave portion 18 of the base portion 11 is fitted.
a into the male screw portion 68a of the lid mounting portion 68 of the branch tap 3. At this time, the female screw portion 1 of the concave portion 18 of the base portion 11
The position of the branch tap 3 loosely temporarily fixed to the water pipe 2 is finely adjusted so that the screw 8a and the male screw section 68a of the lid attaching section 68 of the branch tap 3 can be smoothly screwed. Thereby, the threaded water sealing device main body 1 for the rod structure 30
0 and the position of the new branch tap 3, in other words, the water pipe 2
The position of the branch tap 3 with respect to the hole 93 can be adjusted. When the screwing of the female screw portion 18a of the concave portion 18 of the base portion 11 and the male screw portion 68a of the lid mounting portion 68 of the branch plug 3 is completed, the lid 15 of the main body 10 of the threaded water sealing device is replaced with an annular thick portion. 23, and tightly sealed by packing 26.
At this stage, in particular, when the lid 15 or the like is removed, when the lid 15 is screwed to the thick annular portion 23,
The position of the branch tap 3 may be further finely adjusted and finally fixed to the water pipe 2.

As described above, the state returns to the state shown in FIG. However, the stopper 50 and the pin 52 need not be attached. Also, a plug 13b of the drain or chip discharge hole 13a
Is preferably left open.

Next, a lever 55 is attached to the prismatic portion 43 of the threaded water-sealing rod structure 30, and the lever 55 is turned in the direction C1 to rotate the threaded water-sealing tool 31 located at the lower end of the rod structure 30. The screw engagement between the male screw portion 37 and the female screw portion of the hole 93 of the water pipe 2 is released. Threaded water sealing tool 31 has hole 93
, The state is almost as shown in FIG. In this state, the temporary sealing of the hole 93 of the water pipe 2 by the male thread portion 37 of the threaded water sealing tool 31 is practically completely released.
Tap water enters a space 10a in the main body 10 of the threaded water sealing device. At this time, even if a small amount of chips remains in the vicinity of the threaded portion, the chips enter the chamber 10a together with the tap water from the water pipe 2 with the progress of the unscrewing of the threaded water sealing tool 31, and the chips are discharged. It is discharged through the hole 13a.

Next, the lever 55 is removed and the lever 2 is removed.
The upper cylinder 16 is moved in the U direction with respect to the lower cylinder 13 by positioning the 4, 4 in the B1 direction and turning the C4 in the C1 direction. As the upper cylinder 16 moves upward U, the threaded watertight rod structure 30 engaged with the upper cylinder 16 via the packing 26 at the small-diameter cylindrical portion 42 also moves upward U. If desired, the threaded water sealing rod structure 30 may be pulled up in the U direction by using the stopper 50 or the like. Threaded water sealing tool 3 for threaded water sealing rod structure 30
When the lower end of 1 (the lower end of the tap portion 36) is surely lifted above the ball valve 65 of the branch tap 3, the cock 66 turns the ball valve 65 to the closed position via the shaft 67. If desired, the levers 24, 24 are further turned in the C1 direction, and the threaded water sealing tool 31 is pulled up above the lower end surface of the base 11. In addition, after pulling up the threaded water sealing tool 31 at a stretch above the lower end surface of the base 11,
The ball valve 65 may be set to the closed position. As described above, the state returns to the state shown in FIG. 3 (however, the pin 52 and the stopper 50 need not be provided for the rod structure 30).

Next, the screwing of the base portion 11 of the threaded water sealing device main body 10 and the lid mounting portion 68 of the branch tap 3 is released, and the device main body 10 is removed. Put 70 on. If the lid 5 is attached, remove it, connect it to the pipe 4, and finally turn the open / close control end 66 to open the valve 65. Thereby, the state returns to the state shown in FIG. 2 and the replacement of the branch tap 3 is completed.

In the above, the clearance or chamber 10 is provided between the support rod 34 of the threaded water sealing rod structure 30 and the inner cylindrical portion 12 of the lower cylindrical body 13 of the threaded water sealing device main body 10.
Although the example in which a is formed has been described, the outer diameter of the large-diameter cylindrical portion 41 of the support rod 34 is made substantially the same as the inner diameter of the inner cylindrical portion 12, and the large-diameter cylindrical portion 41 is , May be slidable in the up and down directions U and D.

Further, in some cases, the device main body 10
Instead of the upper and lower cylinders 16 and 13, the upper and lower cylinders are formed as a single unitary cylinder or a cylindrical device main body, and the large-diameter cylindrical portion 41 can slide on the cylinder or the like. May be inserted. In that case, the support rod 3
4 may have the same diameter.

Conventionally, among the branching openings 93 of the water pipe 2, those that are no longer used include those in which the wooden stopper 100 is used to close the opening 93. Also, conventionally, when the old branch tap 3 is corroded and malfunctions, or when the branch tap 3 is erroneously damaged during other construction work, the branch tap 3 is removed and removed. ), Wooden stopper 1
00, the opening 93 is closed. In such a case,
Conventionally, a new branch plug 3 is attached to another part in the vicinity of the closed opening 93, or a new branch plug 3 is attached to the place where the wooden stopper 100 is attached, and at the opening 93 where the wooden stopper 100 is attached, Holes of the same or larger diameter are drilled again.
Conventionally, in the case of drilling at the wooden plug 100, when drilling, the wooden plug 100 is actually dropped into the water pipe 2 at the tip of the drill, and the wooden plug dropped into the water pipe 2 is actually used. 100
However, there is an accident that the opening (93) for branching to another home on the downstream side is blocked.

When such a wooden plug 100 is used, the tip of the support rod 34 is replaced with the wood screw part 1 as shown in FIG.
A threaded rod structure 130 is formed by attaching a screwing tool 131 having a base end 32 having a male screw portion 39 on the base end side and a prismatic portion 40 on the base end side, and a wood screw portion 136 is formed by a lever 55. As shown in FIG. 8B, the screwed rod structure 130 is erected on the water pipe 2 at the wooden stopper 100 as shown in FIG. 8 (b). Screw it to the vicinity of the base end 136a). In this case, since the top of the wooden plug 100 which is completely exposed can be seen and the tip of the wood screw portion 136 can be actually set up at the center thereof, the centering can be easily performed. If necessary, after removing the support rod 34 from the screw-in tool 131, as described above, a new branch tap 3
Is loosely attached to the water pipe 2 at the screw fitting 131,
After attaching the support rod 34 to the screwing tool 131 again,
The apparatus main body 10 is mounted on the lid mounting portion 68 of the branch tap 3, the position of the branch tap 3 is adjusted with respect to the water pipe 2, final fixing is performed, and the stopper 50 is placed at the lower hole 45 of the support rod 34. After mounting, finally, the device body 10
Of the upper cylinder 16 by turning the levers 24, 24 in the C1 direction.
At the same time, the wooden plug 100 may be pulled out from the hole 93 by pulling up the threaded rod structure 130 in the U direction. Thereafter, by further pulling up the rod structure 30, setting the branch valve 3 to the closed state of the ball valve 65, and removing the apparatus main body 10 from the branch valve 3, the hole 93 of the wooden plug 100 is left as it is. It can be used as a branch opening for a new branch tap 3. Also in this case, the rod structure 1
30 is used for positioning (substantially centering) the hole of the branch tap 3 with respect to the hole 93 of the water pipe 2 and for the inlet port 61 of the branch tap 3 to which the hole 93 which is originally clear is newly attached as it is. It can be used as a branch opening.

When the threaded water sealing device 1 of FIG. 1 is also used for drilling the branch opening 93 , for example, the base end of the drill is replaced with the support rod 34 instead of the threaded water sealing tool 31.
A thick cylindrical shape having an outer diameter larger than the diameter of the hole 22 a of the annular flange portion 22 and an inner diameter matching the diameter of the small diameter cylindrical portion 42 of the support rod 34. The sleeve or the spacer is fitted to the small-diameter cylindrical portion 42 such that the lower end thereof abuts against the end surface of the large-diameter cylindrical portion 41, and the upper end surface of the sleeve is pushed down on the lower surface of the annular flange portion 22 so that the tip of the drill is connected to the pipe wall of the water pipe 2. Rotate lever 55 in direction C2 while pressing against lever 91 to make a slight perforation.
It is sufficient to repeat the process of turning the drill 4 in the direction C2 and pressing the tip of the drill against the bottom of the hole being drilled. In this case, after replacing with a new branch tap 3 as shown in FIGS.
The diameter of the branch opening 93 may be increased.

[Brief description of the drawings]

1 shows a preferred embodiment of a threaded water sealing device according to the present invention, wherein (a) is a cross-sectional explanatory view of the threaded water sealing device, and (b) is a threaded sealing device of (a). FIG.

FIG. 2 shows a water pipe to which the threaded water sealing device of FIG. 1 is applied and a branch tap (water tap) attached to the water pipe, wherein (a) shows a water pipe and a branch tap. Sectional explanatory view (top view shows the threaded water sealing device of FIG. 1 in comparison), (b)
FIG.

FIG. 3 is an explanatory sectional view similar to FIG. 2A, showing a state in which the thread water sealing device of FIG. 1 is attached to a branch tap.

FIG. 4 is a cross-sectional explanatory view similar to FIG. 3 showing a state immediately before a tap portion of a threaded water sealing device of the threaded water sealing device starts to bite into a branch opening (hole) of a water pipe;

FIG. 5 is a perspective view of the threaded water sealing device of the threaded water sealing device, in which the male thread portion is screwed into the female thread portion formed in the branch opening (hole) of the water pipe, and the hole is temporarily sealed (temporarily sealed). FIG. 5 is a cross-sectional explanatory view similar to FIG.

FIG. 6 is a diagram showing a state in which a branch opening (hole) of a water pipe is temporarily sealed (temporarily sealed water) with a male thread portion of a threaded water sealing device, and a threaded water sealing device main body is removed. Sectional explanatory drawing similar to 5.

FIG. 7 Temporarily seals the opening (hole) for branching of the water pipe (temporary sealing water)
FIG. 7 is a cross-sectional explanatory view similar to FIG.

FIG. 8 shows an example in which a screw-in tool is used in place of the threaded water-sealing tool, wherein (a) is a side view of the screw-in tool,
FIG. 8B is an explanatory side view similar to FIG. 7, showing a state in which the screwing tool is attached to the support rod and the wood screw portion of the screwing tool is screwed into the wooden plug.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Threaded water sealing device 2 Water pipe 3 Branch tap (water tap) 10 Threaded water sealing device main body 11 Base part 12 Inner cylinder part 13 Lower cylinder body 13a Chip discharge hole 14 The cylinder part 15 Lid 16 Upper part Cylinder 21 Outer cylinder main body 24 Lever 26 Packing 30 Threaded water-sealing rod structure 31 Threaded water-sealing tool 32 Base end 34 Support rod 36 Tap part 37 Male thread part 38 Chip discharge groove 39 Male thread part 40 Square pillar part 41 Large Diameter Cylindrical Part 42 Small Diameter Cylindrical Part 43 Square Column Part 45, 46 Pin Insertion Hole 50 Stopper 52 Engagement Pin 55 Lever 60 Branch Tap Body 61 Bottom Inflow Hole (Bottom Inlet) 63 Branch Hole (Branch Outlet) 64 Drilling Hole (top opening) 65 Ball valve 66 Cock 68 Lid mounting part 70 Lid (cap) 80 Saddle type mounting part 83, 84 Saddle member 87 Fastening member 91 Water pipe Wall 92 Surface (outer peripheral surface) 100 Wood plug 130 Screw-in rod structure 131 Screw-in tool 136 Wood screw part A Rotation (rotation) direction of ball valve B1, B2 Rotation direction of lever C Center axis C1, C2 Rod structure Body rotation direction D Down U Up

Claims (4)

(57) [Claims] 1. A threaded water seal having a threaded water seal having a threaded tap portion and a male thread portion continuously formed in the tap portion at a base end side of the tap portion at a lower portion. The rod is used to temporarily seal the branch through-hole of the water pipe that is in communication with the bottom inlet of the existing water tap in the water pipe, and the threaded water-sealing tool is used as a positioning means to remove the existing water tap. A method of replacing a water pipe with a new stopcock. 2. An existing branch tap water-tightly connected to a branch through hole formed in a pipe wall of a water pipe at a bottom inlet through a top opening that is actually linearly connected to the bottom inlet. A threaded water-sealing rod having a threaded water-sealing tool having a threaded tap portion and a male thread portion continuously formed on the tap portion at the base end side of the tap portion at a lower portion is vertically moved. Attach the lower end of the cylindrical device main body outside the slidable water sealing device that is movable, open the valve that shuts off the communication between the bottom inlet and the top opening of the branch tap, and diverge the thread sealing device. The threaded water sealing rod is lowered through the top opening and the bottom inlet of the tap until the water pipe reaches the branch through hole. After forming the thread, the threaded water sealing rod is further advanced downward to By threading the male thread of the water-sealing tool into the female thread of the water pipe, the through-hole for branching of the water pipe is temporarily sealed, and the thread-sealing water tool is screwed into the pipe wall of the water pipe. In the protruding state, the tubular device body of the threaded water sealing device is pulled out from the upper end side of the threaded water sealing device, and further, the fixing of the existing branch tap to the water pipe is released, and the branch tap is screwed. Withdraw the water tap from the upper end side of the cutting water sealing tool, fit the new water tap into the screw water sealing tool so that the upper end side of the water cutting water tool penetrates the bottom inlet and the top opening of the new water tap. Lower to the mounting position on the pipe, fix the new branch tap on the pipe wall of the water pipe, fit the tubular device body of the threaded water sealing device into the threaded sealing rod, and lower the lower end of the tubular device body. After attaching to the top opening of the branch tap, the male thread part of the threaded water sealing tool and the female thread part of the water pipe The threaded water sealing rod is retracted to release the thread engagement, and the temporary sealing of the water pipe branch through hole by the threaded water sealing tool is released.The tap at the lower end of the threaded water sealing tool is a branch tap. A method of replacing a water pipe branch plug by pulling up the threaded water sealing rod until it is above the valve, closing the valve of the branch plug, and removing the threaded water sealing device from the branch plug. 3. A through hole for branch formed in a pipe wall of a water pipe.
Of the existing branch taps that are watertightly connected at the bottom
A lower end at the top opening that is virtually linearly connected to the bottom inlet
A cylindrical device main body configured to be attached with the main body, and the cylindrical device main body movably in an axial direction of the cylindrical device main body.
Threaded tap part and the base end of the tap part
Side is formed continuously with the tap portionTo the tap
Screw into the female thread createdWith male thread
A threaded water seal rod with a threaded water seal at the bottom
PreparationAnd Threaded water seals are threaded until threading is complete.
So that chips generated by the tapping can be discharged.
A part of the male screw part that is continuously connected to the tap part
Equipped with a chip discharge groove in part of the minute, The male screw part has a groove for chip discharge to enable water sealing.
With no parts Threaded water sealing device. 4. A tap portion for threading and a base for the tap portion.
It is formed continuously on the tap portion on the end side.The tap section
Into the female thread created byWith male thread
And Until the thread cutting is completed, chips generated by the thread cutting
In order to be able to discharge, tap the male part between the tap part and the male screw part.
Chip discharge to a part of the part continuously connected to the tip
Groove is formed, The male screw part has a groove for chip discharge to enable water sealing.
With no parts Threaded water seal.