JP3336227B2 - Branching method of resin pipe - Google Patents

Branching method of resin pipe

Info

Publication number
JP3336227B2
JP3336227B2 JP15189597A JP15189597A JP3336227B2 JP 3336227 B2 JP3336227 B2 JP 3336227B2 JP 15189597 A JP15189597 A JP 15189597A JP 15189597 A JP15189597 A JP 15189597A JP 3336227 B2 JP3336227 B2 JP 3336227B2
Authority
JP
Japan
Prior art keywords
branch
hole
sleeve
resin
tap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP15189597A
Other languages
Japanese (ja)
Other versions
JPH112380A (en
Inventor
博光 中西
Original Assignee
栗本商事株式会社
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Filing date
Publication date
Application filed by 栗本商事株式会社 filed Critical 栗本商事株式会社
Priority to JP15189597A priority Critical patent/JP3336227B2/en
Publication of JPH112380A publication Critical patent/JPH112380A/en
Application granted granted Critical
Publication of JP3336227B2 publication Critical patent/JP3336227B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/04—Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor
    • F16L41/06—Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor making use of attaching means embracing the pipe

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】この発明は、水道又はガスの
配管に使用されるポリエチレン等の樹脂管の分岐工法に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of branching a resin pipe such as polyethylene used for water or gas piping.

【０００２】[0002]

【従来の技術】一般に、地中に埋設した水道又はガスの
本管から新たな需要者に管路を分岐させる際、他の需要
者に影響を及ぼさないため、水やガスの供給を続けたま
ま工事を行う。この分岐工事には、地上から掘り下げて
露出した本管にサドルを介して分岐栓（ここでは、水道
の場合の分水栓も分岐栓と称する。）を取り付け、分岐
栓の中央部を縦断する軸孔を通じて上方からドリルを下
降させ、このドリルにより本管に分岐孔を穿設した後、
ドリルを引き上げ、分岐栓を閉じて流体の流出を断ち、
軸孔の上端を閉塞すると共に、分岐栓の分岐口に分岐管
を接続し、分岐栓を開いて本管と分岐管とを連通させる
という工法が慣用されている。本管としては、通常、鋳
鉄管が使用されており、サドルは６００〜８００ｋｇｆ
・ｃｍのトルクで締め付けられている。2. Description of the Related Art Generally, when branching a pipeline from a water or gas main line buried underground to a new customer, the supply of water or gas is continued so as not to affect other customers. Work will continue as it is. In this branching work, a branch tap (here, a water tap in the case of water supply is also referred to as a branch tap) is attached to the main pipe dug out from the ground and exposed through a saddle, and a central portion of the branch tap is vertically cut. After lowering the drill from above through the shaft hole and drilling a branch hole in the main pipe with this drill,
Pull up the drill, close the stopcock and cut off the fluid outflow,
It is customary to close the upper end of the shaft hole, connect a branch pipe to the branch port of the branch tap, open the branch tap, and connect the main pipe to the branch pipe. As the main pipe, a cast iron pipe is usually used, and the saddle is 600 to 800 kgf.
・ It is tightened with a torque of cm.

【０００３】ところで、近年、耐蝕性・耐震性等を考慮
して、鋳鉄管に代えてポリエチレン等の樹脂管が本管に
使用されることがあり、このような樹脂管の場合、強力
に締め付けると変形するため、サドルの締付トルクは２
００ｋｇｆ・ｃｍ程度に抑える必要がある。In recent years, resin pipes such as polyethylene are sometimes used for main pipes instead of cast iron pipes in consideration of corrosion resistance and earthquake resistance, and such resin pipes are strongly tightened. The saddle tightening torque is 2
It needs to be suppressed to about 00 kgf · cm.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、上記の
ように、樹脂管に小さなトルクで締め付けられたサドル
は、地震により大きな外力を受けた場合、樹脂管に対し
てずれやすく、このずれが大きいと、分岐孔が塞がれて
流体が分岐管に流れなくなる恐れがあった。However, as described above, the saddle fastened to the resin pipe with a small torque tends to shift with respect to the resin pipe when receiving a large external force due to an earthquake. There is a risk that the branch hole will be closed and the fluid will not flow to the branch pipe.

【０００５】そこで、この発明は、樹脂管に対するサド
ルのずれを防止することを課題とする。Therefore, an object of the present invention is to prevent the saddle from being shifted from the resin tube.

【０００６】[0006]

【課題を解決するための手段】上記課題を解決するた
め、この発明では、樹脂管にサドルを介して分岐栓を取
り付け、この分岐栓の頭部に装着される治具は、分岐栓
のねじ部にねじ込まれる接続プラグにねじ棒を螺合さ
せ、このねじ棒の先端部に円筒状の穿孔具を設け、その
先端部に縮径部を形成したものとし、前記穿孔具の外周
にスリーブを嵌め、前記接続プラグを分岐栓に固定して
分岐栓の軸孔に前記ねじ棒を挿入し、このねじ棒の前進
方向への回転に伴い穿孔具を下降させて樹脂管を押し切
り、樹脂管に分岐孔を穿設すると共に、前記スリーブを
前記軸孔と分岐孔とに跨がる位置まで圧入する工法を提
案する。In order to solve the above-mentioned problems, according to the present invention, a branch tap is attached to a resin pipe via a saddle, and a jig attached to the head of the branch tap is a branch plug.
Screw the connecting rod into the threaded part of the
And a cylindrical piercing tool is provided at the tip of this threaded rod.
A diameter-reduced portion is formed at the tip , a sleeve is fitted around the outer periphery of the drilling tool, the connection plug is fixed to the branch plug, and the screw rod is inserted into the shaft hole of the branch plug. A method is proposed in which the drilling tool is lowered along with the rotation in the direction to push off the resin tube, a branch hole is formed in the resin tube, and the sleeve is press-fitted to a position straddling the shaft hole and the branch hole. .

【０００７】この工法で施工すると、スリーブにより樹
脂管に対するサドルの相対移動が阻止されるため、分岐
孔がサドルで塞がれることがない。With this construction method, the sleeve prevents the saddle from moving relative to the resin tube, so that the branch hole is not closed by the saddle.

【０００８】また、この工法は、樹脂管への穿孔と同時
にスリーブを装着することができるので、作業能率に優
れている。[0008] Further, according to this construction method, since the sleeve can be mounted simultaneously with the perforation of the resin pipe, the work efficiency is excellent.

【０００９】また、穿孔具の先端部に縮径部が形成され
ているので、分岐孔の穿設に伴ってくり抜かれた樹脂管
の切屑は、穿孔具内に保持され、樹脂管内に落下するこ
とがない。 In addition, a reduced diameter portion is formed at the tip of the drill.
The resin tube was cut out as the branch hole was drilled.
Chips are held in the piercing tool and fall into the resin tube.
And not.

【００１０】また、縮径部の存在により、穿孔具の刃先
により形成される分岐孔の内径は、スリーブの外径より
もその肉厚分以上に小さくなるので、スリーブと分岐孔
の周面との接触圧が高まり、スリーブの分岐孔からの抜
け出しが防止される。 [0010] Further , the presence of the reduced diameter portion allows the cutting edge of the piercing tool to be cut.
The inner diameter of the branch hole formed by
Is smaller than the wall thickness, so the sleeve and branch hole
The contact pressure with the peripheral surface of the
Breakout is prevented.

【００１１】[0011]

【発明の実施の形態】以下、この発明の実施の形態を添
付図面に基づいて説明する。図１に示すように、この工
法では、まず、従来と同様に、ポリエチレンから成る本
管１にサドル２を介して分岐栓３を取り付ける。この
際、本管１とサドル２との間にはゴム製のライナ４を介
在させる。Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, in this method, first, a branch tap 3 is attached to a main pipe 1 made of polyethylene via a saddle 2 as in the conventional method. At this time, a rubber liner 4 is interposed between the main pipe 1 and the saddle 2.

【００１２】前記分岐栓３は、本体５の内部に弁体６を
設けたものであり、本体５には縦方向の軸孔７及びこれ
に軸線が交わる側孔８が、弁体６にはＴ字孔９がそれぞ
れ形成されている。弁体６は、本体５から側方に突出す
る操作軸１０の操作により回転し、その回転に伴い、両
孔７、８がＴ字孔９を介して連通する状態と、両孔７、
８が遮断された状態とを切り換える。本体５の軸孔７の
上端部外周にはねじ部１１が形成され、側孔８の先端は
分岐口１２となっている。The branch tap 3 is provided with a valve body 6 inside a main body 5. The main body 5 has a vertical shaft hole 7 and a side hole 8 intersecting the axis with the shaft hole 7. T-shaped holes 9 are respectively formed. The valve body 6 is rotated by the operation of the operation shaft 10 projecting laterally from the main body 5. With the rotation, the two holes 7, 8 communicate with each other through the T-shaped hole 9,
8 switches the state to the cut-off state. A threaded portion 11 is formed on the outer periphery of the upper end of the shaft hole 7 of the main body 5, and a tip of the side hole 8 is a branch port 12.

【００１３】ところで、この工法では、図２（ａ）に示
すような治具２０を使用する。この治具２０は、分岐栓
３のねじ部１１にねじ込み可能な接続プラグ２１にねじ
棒２２を螺合させ、このねじ棒２２の先端部に鍔部２３
を介して円筒状の穿孔具２４を設けたものであり、穿孔
具２４の先端部には縮径部２５が、基端部には凹周溝２
６がそれぞれ形成されている。また、ねじ棒２２には、
基端部に角軸部２７が設けられ、軸方向に貫孔２８が形
成されている。In this method, a jig 20 as shown in FIG. 2A is used. The jig 20 has a threaded rod 22 screwed into a connection plug 21 that can be screwed into the threaded part 11 of the branch tap 3, and a flange 23 is attached to the tip of the threaded rod 22.
, A cylindrical piercing tool 24 is provided through the piercing tool. A reduced diameter portion 25 is provided at the distal end of the piercing tool 24 and the concave circumferential groove 2 is provided at the base end.
6 are formed respectively. The screw rod 22 has
A square shaft portion 27 is provided at the base end, and a through hole 28 is formed in the axial direction.

【００１４】なお、図示のものでは穿孔具２４とねじ棒
２２とが一体に成形されているが、これらを別体として
逆ねじにより螺合させるようにしてもよい。このように
すると、穿孔具２４を取り替えることができる。Although the piercing tool 24 and the screw rod 22 are integrally formed in the drawing, they may be separately screwed together with a reverse screw. In this way, the perforator 24 can be replaced.

【００１５】上記治具２０には、施工に際して、図２
（ｂ）に示すように、凹周溝２６にＯリング２９を嵌
め、穿孔具２４の外周にスリーブ３０を嵌める。スリー
ブ３０の外周面には先端側が小径となる段部３１が形成
されている。このスリーブ３０を鍔部２３に当接するま
で嵌め込むと、Ｏリング２９は弾力的に圧縮され、スリ
ーブ３０は穿孔具２４から抜け止めされる。この抜止手
段は螺合によるものであってもよい。At the time of construction, the jig 20 shown in FIG.
As shown in (b), an O-ring 29 is fitted in the concave circumferential groove 26, and a sleeve 30 is fitted on the outer periphery of the piercing tool 24. On the outer peripheral surface of the sleeve 30, a step portion 31 having a small diameter at the tip end side is formed. When the sleeve 30 is fitted until it comes into contact with the flange 23, the O-ring 29 is elastically compressed, and the sleeve 30 is prevented from falling out of the punch 24. This retaining means may be screwed.

【００１６】次に、図３に示すように、分岐栓３のねじ
部１１に接続プラグ２１をねじ込んで治具２０を分岐栓
３に固定すると共に、Ｔ字孔９を介して連通状態とした
軸孔７に穿孔具２４を挿入する。そして、ねじ棒２２の
角軸部２７に係合させたハンドル３２の操作により、ね
じ棒２２を前進方向に回転させ、この回転に伴い、図４
に示すように、穿孔具２４を下降させて、穿孔具２４の
刃先で本管１を押し切り、本管１に分岐孔３３を穿設す
ると共に、スリーブ３０を段部３１が本管１の外周面に
当接するまで圧入する。この状態では、スリーブ３０は
軸孔７と分岐孔３３とに跨がっている。Next, as shown in FIG. 3, the connection plug 21 is screwed into the threaded portion 11 of the branch plug 3 to fix the jig 20 to the branch plug 3 and to establish a communication state through the T-shaped hole 9. The piercing tool 24 is inserted into the shaft hole 7. Then, by operating the handle 32 engaged with the square shaft portion 27 of the screw rod 22, the screw rod 22 is rotated in the forward direction.
As shown in the figure, the piercing tool 24 is lowered, the main pipe 1 is pushed off by the cutting edge of the piercing tool 24, a branch hole 33 is formed in the main pipe 1, and the sleeve 30 is connected to the outer periphery of the main pipe 1 by the step portion 31. Press until it touches the surface. In this state, the sleeve 30 straddles the shaft hole 7 and the branch hole 33.

【００１７】なお、分岐孔３３の穿設に伴ってくり抜か
れた本管１の切屑３４は、縮径部２５により穿孔具２４
内に保持されるので、本管１内に落下することがない。The chips 34 of the main pipe 1 which are cut out in accordance with the formation of the branch holes 33 are cut by the reduced diameter portion 25 to form the piercing tool 24.
, It does not fall into the main pipe 1.

【００１８】また、縮径部２５の存在により、穿孔具２
４の刃先により形成される分岐孔３３の内径は、スリー
ブ３０の外径よりもその肉厚分以上に小さくなるので、
スリーブ３０と分岐孔３３の周面との接触圧が高まり、
スリーブ３０の分岐孔３３からの抜け出しが防止され
る。Further, the presence of the reduced diameter portion 25 allows the piercing device 2
Since the inner diameter of the branch hole 33 formed by the cutting edge of No. 4 is smaller than the outer diameter of the sleeve 30 by the thickness or more,
The contact pressure between the sleeve 30 and the peripheral surface of the branch hole 33 increases,
The sleeve 30 is prevented from coming out of the branch hole 33.

【００１９】その後、図５に示すように、ねじ棒２２を
後退方向に回転させると、分岐孔３３に保持されたスリ
ーブ３０は、穿孔具２４の上昇に伴い、穿孔具２４から
抜け出る。そして、穿孔具２４が弁体６の上方まで上昇
した後、弁体６を閉鎖方向に回転させて軸孔７を遮断
し、治具２０を分岐栓３から取り外す。穿孔具２４内の
切屑３４は、ねじ棒２２の貫孔２８に棒を挿通して突き
出す。Thereafter, as shown in FIG. 5, when the screw rod 22 is rotated in the retreating direction, the sleeve 30 held in the branch hole 33 comes out of the piercing tool 24 as the piercing tool 24 rises. Then, after the piercing tool 24 rises above the valve body 6, the valve body 6 is rotated in the closing direction to block the shaft hole 7, and the jig 20 is removed from the branch tap 3. The chips 34 in the piercing tool 24 protrude through the through-hole 28 of the screw rod 22 by passing the rod.

【００２０】そして、図６に示すように、ねじ部１１に
キャップ３５をねじ込んで軸孔７の上端を封止し、弁体
６を開放方向に回転させて両孔７、８を連通させると、
分岐口１２に接続された分岐管３６に本管１の流体が分
岐される。Then, as shown in FIG. 6, when the cap 35 is screwed into the screw portion 11, the upper end of the shaft hole 7 is sealed, and the valve body 6 is rotated in the opening direction to connect the two holes 7, 8. ,
The fluid in the main pipe 1 is branched to a branch pipe 36 connected to the branch port 12.

【００２１】この工法で施工した分岐構造では、軸孔７
と分岐孔３３とに跨がるスリーブ３０により本管１に対
するサドル２の相対移動が阻止されるため、分岐孔３３
がサドル２で塞がれることがない。In the branch structure constructed by this method, the shaft hole 7
The relative movement of the saddle 2 with respect to the main pipe 1 is prevented by the sleeve 30 extending over the branch hole 33 and the branch hole 33.
Is not blocked by saddle 2.

【００２２】また、この工法は、本管１への穿孔と同時
にスリーブ３０を装着することができるので、作業能率
に優れている。Further, according to this method, the sleeve 30 can be mounted simultaneously with the perforation of the main pipe 1, so that the working efficiency is excellent.

【００２３】[0023]

【発明の効果】以上のように、この発明に係る分岐工法
により施工すると、スリーブを分岐栓の軸孔と樹脂管の
分岐孔とに跨がる位置まで圧入するので、スリーブによ
り樹脂管に対するサドルの相対移動が阻止される。従っ
て、分岐孔がサドルで塞がれることがなく、分岐管への
流体の流れが妨げられることがない。As described above, when the branching method according to the present invention is applied, the sleeve is press-fitted to a position straddling the shaft hole of the branch tap and the branch hole of the resin pipe. Are prevented from moving relative to each other. Therefore, the branch hole is not closed by the saddle, and the flow of the fluid to the branch pipe is not hindered.

【００２４】また、この工法は、樹脂管への穿孔と同時
にスリーブを装着することができるので、作業能率に優
れている。Further, according to this method, the sleeve can be mounted simultaneously with the perforation of the resin tube, so that the working efficiency is excellent.

【００２５】また、穿孔具の先端部に縮径部が形成され
ているので、分岐孔の穿設に伴ってくり抜かれた樹脂管
の切屑は、穿孔具内に保持され、樹脂管内に落下するこ
とがない。 Also, a reduced diameter portion is formed at the tip of the drill.
The resin tube was cut out as the branch hole was drilled.
Chips are held in the piercing tool and fall into the resin tube.
And not.

【００２６】また、縮径部の存在により、穿孔具の刃先
により形成される分岐孔の内径は、スリーブの外径より
もその肉厚分以上に小さくなるので、スリーブと分岐孔
の周面との接触圧が高まり、スリーブの分岐孔からの抜
け出しが防止される。 Further , the presence of the reduced diameter portion allows the cutting edge of the piercing tool to be cut.
The inner diameter of the branch hole formed by
Is smaller than the wall thickness, so the sleeve and branch hole
The contact pressure with the peripheral surface of the
Breakout is prevented.

【図面の簡単な説明】[Brief description of the drawings]

【図１】この発明に係る分岐工法において分岐栓の取付
状態を示す要部縦断図FIG. 1 is a longitudinal sectional view showing a main part of a branch tap attached in a branching method according to the present invention.

【図２】（ａ）は治具の要部縦断図 （ｂ）は穿孔具へのスリーブ嵌め込み状態を示す一部切
欠拡大図2A is a longitudinal sectional view of a main part of a jig, and FIG. 2B is a partially cutaway enlarged view showing a state in which a sleeve is fitted into a piercing tool.

【図３】同上の穿孔前の状態を示す図FIG. 3 is a diagram showing a state before perforation according to the first embodiment;

【図４】同上の穿孔及びスリーブ圧入状態を示す図FIG. 4 is a view showing a state in which the hole is pierced and a sleeve is press-fitted.

【図５】同上の穿孔及びスリーブ装着後の分岐栓閉鎖状
態を示す要部縦断図FIG. 5 is a longitudinal sectional view of a main part showing a state in which the stopcock is closed after the perforation and the sleeve are attached in the same.

【図６】同上の施工後の状態を示す要部縦断図FIG. 6 is a longitudinal sectional view of a main part showing a state after the above construction.

【符号の説明】[Explanation of symbols]

１ 本管（樹脂管） ２ サドル ３ 分岐栓 ５ 本体 ６ 弁体 ７ 軸孔 ８ 側孔 １１ ねじ部 １２ 分岐口 ２０ 治具 ２１ 接続プラグ ２２ ねじ棒 ２４ 穿孔具２５ 縮径部 ３０ スリーブ ３３ 分岐孔 DESCRIPTION OF SYMBOLS 1 Main pipe (resin pipe) 2 Saddle 3 Branch tap 5 Main body 6 Valve body 7 Shaft hole 8 Side hole 11 Screw part 12 Branch port 20 Jig 21 Connection plug 22 Screw rod 24 Drilling tool 25 Reduced diameter part 30 Sleeve 33 Branch hole

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 樹脂管１にサドル２を介して分岐栓３を
取り付け、この分岐栓３の頭部に装着される治具２０
は、分岐栓３のねじ部１１にねじ込まれる接続プラグ２
１にねじ棒２２を螺合させ、このねじ棒２２の先端部に
円筒状の穿孔具２４を設け、その先端部に縮径部２５を
形成したものとし、前記穿孔具２４の外周にスリーブ３
０を嵌め、前記接続プラグ２１を分岐栓３に固定して分
岐栓３の軸孔７に前記ねじ棒２２を挿入し、このねじ棒
２２の前進方向への回転に伴い穿孔具２４を下降させて
樹脂管１を押し切り、樹脂管１に分岐孔３３を穿設する
と共に、前記スリーブ３０を前記軸孔７と分岐孔３３と
に跨がる位置まで圧入する樹脂管の分岐工法。1. A branch tap 3 is attached to a resin pipe 1 via a saddle 2 and a jig 20 attached to the head of the branch tap 3.
Is a connection plug 2 screwed into the screw portion 11 of the branch tap 3.
1 is screwed with the screw rod 22, and
A cylindrical piercing tool 24 is provided, and a reduced diameter portion 25 is provided at the tip thereof.
A sleeve 3 is formed around the perforator 24.
Fitted with a 0, the connection plug 21 is fixed to the branching plug 3 inserting the threaded rod 22 into the shaft hole 7 of the branch plug 3, the threaded rod
The perforating tool 24 is lowered with the rotation of the tube 22 in the forward direction, and the resin tube 1 is pushed off to form a branch hole 33 in the resin tube 1 and the sleeve 30 is straddled between the shaft hole 7 and the branch hole 33. A branching method for resin pipes that is press-fitted to the position where it will be bent.
JP15189597A 1997-06-10 1997-06-10 Branching method of resin pipe Expired - Fee Related JP3336227B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15189597A JP3336227B2 (en) 1997-06-10 1997-06-10 Branching method of resin pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15189597A JP3336227B2 (en) 1997-06-10 1997-06-10 Branching method of resin pipe

Publications (2)

Publication Number Publication Date
JPH112380A JPH112380A (en) 1999-01-06
JP3336227B2 true JP3336227B2 (en) 2002-10-21

Family

ID=15528549

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15189597A Expired - Fee Related JP3336227B2 (en) 1997-06-10 1997-06-10 Branching method of resin pipe

Country Status (1)

Country Link
JP (1) JP3336227B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4721250B2 (en) * 2000-10-30 2011-07-13 日立金属株式会社 Branch extraction fitting

Also Published As

Publication number Publication date
JPH112380A (en) 1999-01-06

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