JPH04140007A - Pulling method in existing conduit - Google Patents
Pulling method in existing conduitInfo
- Publication number
- JPH04140007A JPH04140007A JP2261557A JP26155790A JPH04140007A JP H04140007 A JPH04140007 A JP H04140007A JP 2261557 A JP2261557 A JP 2261557A JP 26155790 A JP26155790 A JP 26155790A JP H04140007 A JPH04140007 A JP H04140007A
- Authority
- JP
- Japan
- Prior art keywords
- hollow pipe
- compressed air
- umbrella
- conduit
- pipe
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 230000001141 propulsive effect Effects 0.000 claims description 4
- 238000007664 blowing Methods 0.000 abstract description 3
- 238000005422 blasting Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 239000013307 optical fiber Substances 0.000 description 9
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
- G02B6/52—Underground or underwater installation; Installation through tubing, conduits or ducts using fluid, e.g. air
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electric Cable Installation (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、既設ケーブル管路等の内部に光フアイバケー
ブル等を通した中空パイプを圧縮空気を利用して引き込
む既設管路内引き込み方法に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for drawing a hollow pipe through which an optical fiber cable or the like is passed into an existing cable conduit using compressed air. .
（従来の技術）
第３図は、特開昭６０−１１６９８５号公報に示された
パラシュートを利用して管路内にケーブル等の線状体を
引き込む方法を示す縦断面図である。(Prior Art) FIG. 3 is a longitudinal sectional view showing a method of drawing a linear body such as a cable into a conduit using a parachute, which is disclosed in Japanese Patent Application Laid-open No. 116985/1985.
図において、１は線状体２を引き込む管である。この管
１内にその入口からパラシュート状牽引具３を入れる。In the figure, 1 is a tube into which a linear body 2 is drawn. A parachute-like towing device 3 is inserted into this tube 1 from its entrance.
該牽引具３はリール４と連結されている。リール４には
光フアイバケーブル等の線状体２が巻回され、線状体２
の一端は、前記管１の入口側の固定部材５に固定されて
いる。そして、送風機６から管１内に加圧ガスを供給し
てパラシュート状牽引具３を押圧・前進させ、リール４
に巻回された線状体２を繰り出させて管１全体に布設す
る。The traction tool 3 is connected to a reel 4. A linear body 2 such as an optical fiber cable is wound around the reel 4.
One end of the tube 1 is fixed to a fixing member 5 on the inlet side of the tube 1. Then, pressurized gas is supplied from the blower 6 into the tube 1 to press and advance the parachute-shaped traction tool 3, and the reel 4
The wire body 2 wound around is let out and laid over the entire pipe 1.
（発明が解決しようとする課題）
上記第３図に示した従来の管路内引き込み方法では、次
のような解決すべき課題がある。(Problems to be Solved by the Invention) The conventional method for drawing into a pipe shown in FIG. 3 has the following problems to be solved.
（１）光フアイバケーブル等の線状体２を牽引するパラ
シュート状牽引具３は、覆い面に力骨を有していないた
めに、何等かの理由で送風機６からの送風を止めて再び
送風するような場合に、管１内でパラシュートの部がス
ムーズに広がらない可能性がある。(1) Since the parachute-like traction device 3 that pulls the linear object 2 such as an optical fiber cable does not have a reinforcement on the cover surface, the air blowing from the blower 6 may be stopped for some reason and the air may be blown again. In such cases, the parachute portion may not expand smoothly within the tube 1.
特に、第４図に示すように管１内に既設ケーブル６が布
設されている場合には、パラシュートの一部が、既設ケ
ーブル６と管ｌとの隙間に引っ掛かり、管１内での前進
が不可能となるおそれがある。In particular, when the existing cable 6 is installed inside the pipe 1 as shown in FIG. It may become impossible.
（２）パラシュート状牽引具３を前進させる駆動力は、
先端のパラシュート部の覆い面に当たる圧力のみであり
、かつ、比較的管径が大きいので、供給する加圧ガスも
大量に供給しなければならない。(2) The driving force that moves the parachute-shaped traction device 3 forward is:
Since the pressure is applied only to the covering surface of the parachute section at the tip and the diameter of the tube is relatively large, a large amount of pressurized gas must also be supplied.
（３）管１の管径が比較的大きいため、管１の入口側を
塞ぐシールが必要となる。(3) Since the diameter of the tube 1 is relatively large, a seal is required to close the inlet side of the tube 1.
本発明は上記のような各課題を解決するためになされた
もので、少量の圧縮空気の供給により、既設管路に作業
性良くスムーズに光フアイバケーブル等を通した中空パ
イプを引き込むことができる経済性に優れた既設管路内
引き込み方法を提供することを目的とする。The present invention has been made to solve the above-mentioned problems, and by supplying a small amount of compressed air, it is possible to smoothly draw a hollow pipe through which an optical fiber cable, etc. is passed, into an existing pipeline with good workability. The purpose of this invention is to provide an economical method for leading into existing pipelines.
（課題を解決するための手段）
本発明の既設管路内引き込み方法は、中空パイプの先端
部に、複数の力骨を有する傘を取り付け、該中空パイプ
の後端部から圧縮空気を送り、前記傘の覆い面に圧縮空
気を吹き付け、該圧縮空気の圧力により既設管路内を前
進させるとともに、前記全円から既設管路後方に吹き出
す圧縮空気の反力により前記中空パイプの推進力を得て
前記中空パイプを既設管路内に引き込むことを特徴とす
る。(Means for Solving the Problems) The method of drawing into an existing pipeline of the present invention includes attaching an umbrella having a plurality of ribs to the tip of a hollow pipe, sending compressed air from the rear end of the hollow pipe, Compressed air is blown onto the covering surface of the umbrella, and the pressure of the compressed air causes the pipe to move forward within the existing pipe, and the propulsion force of the hollow pipe is obtained by the reaction force of the compressed air blown out from the entire circle to the rear of the existing pipe. The method is characterized in that the hollow pipe is drawn into the existing pipeline.
（作用）
本発明の既設管路内引き込み方法は、中空パイプの先端
部に取り付けた傘の覆い面に、該中空パイプの内部を通
して圧縮空気を吹き付ける。これにより圧縮空気の圧力
と、傘の覆い面から管路後方に吹き出す圧縮空気の反力
により得た中空パイプの推進力とが重畳され、中空パイ
プは管路内を前進する。傘には力骨があるために、既設
ケーブル等があっても傘の覆い面が管路内の隙間に引っ
掛かることなくスムーズに前進する。光フアイバケーブ
ル等を通した中空パイプは管径が細いので、少量の圧縮
空気の供給で済み、また、この中空パイプ自体に圧縮空
気を供給するので、管路入口側のシールも不要となる。(Function) The method of drawing into an existing pipe line according to the present invention blows compressed air through the inside of the hollow pipe onto the covering surface of an umbrella attached to the tip of the hollow pipe. As a result, the pressure of the compressed air and the propulsive force of the hollow pipe obtained by the reaction force of the compressed air blown out from the cover surface of the umbrella toward the rear of the pipe are superimposed, and the hollow pipe moves forward within the pipe. Since the umbrella has strong bones, even if there are existing cables, etc., the cover surface of the umbrella can move forward smoothly without getting caught in the gaps in the conduit. Since a hollow pipe through which an optical fiber cable or the like is passed has a small diameter, only a small amount of compressed air can be supplied, and since compressed air is supplied to the hollow pipe itself, there is no need for a seal on the entrance side of the pipe.
（実施例）
以下に、本発明の一実施例を第１図および第２図を参照
して説明する。(Example) An example of the present invention will be described below with reference to FIGS. 1 and 2.
第１図において、１ｏは既設ケーブル管路であり、この
管路１０内には図示しないケーブルが既設されている。In FIG. 1, 1o is an existing cable conduit, and a cable (not shown) is already installed in this conduit 10.
１１は既設ケーブル管路１０内に引き込まれる中空パイ
プであり、この中空パイプ１１内には、同じく図示しな
い光フアイバケーブルが挿通されている。Reference numeral 11 denotes a hollow pipe drawn into the existing cable conduit 10, and an optical fiber cable, also not shown, is inserted into the hollow pipe 11.
上記の中空パイプ１１の先端部には、折り畳み可能な複
数の力骨１２を有する傘１３が、締結部材１４を介して
取り付けられている。傘１３の覆い面１５は、布、ビニ
ル等の折り畳み可能な材質で形成されている。また、傘
１３の力骨１２は、繊維強化プラスチック（ＦＲＰ）等
の軽量で弾性のある材質からなる。An umbrella 13 having a plurality of foldable ribs 12 is attached to the tip of the hollow pipe 11 via a fastening member 14. The cover surface 15 of the umbrella 13 is made of a foldable material such as cloth or vinyl. Further, the ribs 12 of the umbrella 13 are made of a lightweight and elastic material such as fiber reinforced plastic (FRP).
中空パイプ１１は可とう性のある材質で構成され、内部
の光フアイバケーブルとともに、第２図に示すようなド
ラム１６に巻回されている。このドラム１６は回転自在
な中空シャフト１７に固定されている。中空シャフト１
７の一端は、シール１８により閉塞され、その他端は、
シール１９およびカップリング２０により閉塞されてい
る。The hollow pipe 11 is made of a flexible material, and is wound around a drum 16 as shown in FIG. 2 together with an internal optical fiber cable. This drum 16 is fixed to a rotatable hollow shaft 17. hollow shaft 1
One end of 7 is closed by a seal 18, and the other end is
It is closed by a seal 19 and a coupling 20.
なお、カップリング２０は図示しない圧縮空気を供給す
る供給パイプと接続するためのものである。Note that the coupling 20 is for connecting to a supply pipe (not shown) that supplies compressed air.
中空シャフト１７は、一対の支持部材２１゜２１により
支持され、この支持部材２１．２１は基台２２に固定さ
れている。The hollow shaft 17 is supported by a pair of support members 21.21, which are fixed to the base 22.
ドラム１６の一部には図示しない接続口を有し、中空シ
ャフト１７の内部１７ａと連通ずるように構成されてい
る。ドラム１６に巻回された中空パイプ１１の一端は、
上記接続口に接続される。一方、中空パイプ１１の他端
には、第１図に示した傘１３が取り付けられ、既設管路
１０の入口側に配置される。A portion of the drum 16 has a connection port (not shown) and is configured to communicate with the interior 17a of the hollow shaft 17. One end of the hollow pipe 11 wound around the drum 16 is
Connected to the connection port above. On the other hand, the umbrella 13 shown in FIG. 1 is attached to the other end of the hollow pipe 11 and placed on the inlet side of the existing pipeline 10.
上記の状態で、圧縮空気の供給源から所定の圧力の圧縮
空気を中空シャフト１７内に供給する。In the above state, compressed air at a predetermined pressure is supplied into the hollow shaft 17 from the compressed air supply source.
すると、圧縮空気は、ドラム１６に巻回された中空パイ
プ１１に、ドラム１６に設けた接続口を介して導入され
、既設管路１０の入口側に配置された傘１３の覆い面１
５の内部に高速で吹き出す。Then, the compressed air is introduced into the hollow pipe 11 wound around the drum 16 through the connection port provided in the drum 16, and the compressed air is introduced into the hollow pipe 11 wound around the drum 16 through the connection port provided in the drum 16, and the compressed air is introduced into the hollow pipe 11 wound around the drum 16, and is introduced into the covering surface 1 of the umbrella 13 disposed on the entrance side of the existing pipe line 10.
It blows out at high speed inside 5.
この時の空気圧力により傘１３が、既設管路１０内を前
進する。同時に、覆い面１５に吹き付けられ圧縮空気が
既設管路１０の後方に高速で吹き出す。この時の推進力
が傘１３に加わってスムーズに前進させ、ドラム１６か
ら中空バイブ１１が既設管路ｌｏ内に順次、繰り出され
る。このようにして既設管路１０の一端から他端まで全
長に亘って中空バイブ１１が繰り出されたところで、引
き込み作業を完了する。The umbrella 13 moves forward within the existing pipeline 10 due to the air pressure at this time. At the same time, compressed air is blown onto the cover surface 15 and blown out at high speed behind the existing pipe line 10. The propulsive force at this time is applied to the umbrella 13 to move it forward smoothly, and the hollow vibrator 11 is sequentially fed out from the drum 16 into the existing pipe line lo. When the hollow vibrator 11 has been drawn out over the entire length of the existing pipe line 10 from one end to the other end, the pulling-in operation is completed.
なお、上記の実施例では、中空パイプ１１内に光フアイ
バケーブルを挿通したものの引き込み方法について説明
したが、勿論光フアイバケーブルに限らず、単なるパイ
プや一般ケーブル等の線状体の引き込みに広く適用し得
る。In addition, in the above embodiment, the method of drawing in an optical fiber cable inserted into the hollow pipe 11 was explained, but it is of course applicable not only to an optical fiber cable but also to a wide range of drawing in linear objects such as simple pipes and general cables. It is possible.
（発明の効果）
以上のように、本発明の既設管路内引き込み方法によれ
ば、概略以下のような優れた効果がある。(Effects of the Invention) As described above, the method of leading into an existing pipeline of the present invention has the following excellent effects.
（１）本発明で使用する傘は、軽量で弾性のある力骨を
有するので、例え供給源からの圧縮空気の供給が停止し
ても傘の形状は変わらず、スムーズに既設管路内を前進
させることができる。(1) The umbrella used in the present invention has lightweight and elastic ribs, so even if the supply of compressed air from the supply source stops, the shape of the umbrella will not change and it will move smoothly through the existing pipeline. can move forward.
（２）既設管路と、その内部に布設されたケーブルの間
に隙間が形成されても、傘の力骨により覆い面が支えら
れているので、該隙間に落ち込んで引っ掛かり、以後の
引き込みが困難となるおそれもない。(2) Even if a gap is formed between the existing conduit and the cable laid inside, the covering surface is supported by the umbrella's ribs, so it will fall into the gap and get caught, preventing future pulling. There is no risk that it will be difficult.
（３）既設管路内の傘は、覆い面に当たる圧縮空気の空
気圧力と、覆い面の内面から既設管路の後方に吹き出す
圧縮空気の反力から得た推進力とが重畳された合力で前
進するため、スムーズに中空バイブを引き込むことがで
き、作業性が良好であるとともに、少量の圧縮空気の供
給で済むため、送風効率が良く経済的に引き込み作業を
実施することができる。(3) Umbrellas inside existing pipes are created by the combined force of the air pressure of the compressed air hitting the cover surface and the propulsive force obtained from the reaction force of the compressed air blown out from the inner surface of the cover surface to the rear of the existing pipe. Since it moves forward, the hollow vibrator can be retracted smoothly, resulting in good workability and because only a small amount of compressed air is required, the retraction work can be carried out economically with good air blowing efficiency.
第１図は本発明の既設管路内引き込み方法を説明するた
めの断面図、第２図は同じくそのドラム部分を示す正面
図、第３図は従来のケーブル管路内引き込み方法の一例
を説明するための縦断面図、第４図は同じくその横断面
図である。
１０−−一−−−−−−−−−既設管路、１１−−−−
−−−−−−−一中空パイブ、１２−−一−−−−−−
−−−カ骨、
１３−−−−−−−−−−一一傘、
１５−−−−−−−−−−一一覆い面、１６−−−−−
−−−−−−−ドラム、１７−−−−−−−−−−−−
中空シャフト。
第３図
第４Ｗ！ＪFig. 1 is a sectional view for explaining the method of leading cables into an existing conduit according to the present invention, Fig. 2 is a front view showing the drum portion thereof, and Fig. 3 is an example of a conventional method for drawing cables into a conduit. FIG. 4 is a cross-sectional view thereof. 10--1----------- Existing pipeline, 11--
----------1 hollow pipe, 12--1------
---Ka bone, 13----------11 umbrella, 15--------11 covering surface, 16-----
--------Drum, 17------------
hollow shaft. Figure 3 4W! J
Claims (1)
け、該中空パイプの後端部から圧縮空気を送り、前記傘
の覆い面に圧縮空気を吹き付け、該圧縮空気の圧力によ
り既設管路内を前進させるとともに、前記傘内から既設
管路後方に吹き出す圧縮空気の反力により前記中空パイ
プの推進力を得て前記中空パイプを既設管路内に引き込
むことを特徴とする既設管路内引き込み方法。An umbrella having a plurality of ribs is attached to the tip of the hollow pipe, compressed air is sent from the rear end of the hollow pipe, the compressed air is blown onto the covering surface of the umbrella, and the pressure of the compressed air is used to close the existing pipe line. Inside the existing pipe line, the hollow pipe is moved forward, and the hollow pipe is drawn into the existing pipe line by obtaining a propulsive force of the hollow pipe by the reaction force of compressed air blown out from inside the umbrella to the rear of the existing pipe line. How to pull in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2261557A JPH04140007A (en) | 1990-09-28 | 1990-09-28 | Pulling method in existing conduit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2261557A JPH04140007A (en) | 1990-09-28 | 1990-09-28 | Pulling method in existing conduit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04140007A true JPH04140007A (en) | 1992-05-14 |
Family
ID=17363554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2261557A Pending JPH04140007A (en) | 1990-09-28 | 1990-09-28 | Pulling method in existing conduit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04140007A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06121425A (en) * | 1992-07-23 | 1994-04-28 | Kiyoyuki Horii | Passing method for cable |
| US6296231B1 (en) * | 1998-02-05 | 2001-10-02 | Lattice Intellectual Property Ltd. | Pipe threading arrangement |
| JP2017194078A (en) * | 2016-04-18 | 2017-10-26 | 株式会社ディスコ | Process of manufacture of double piping |
-
1990
- 1990-09-28 JP JP2261557A patent/JPH04140007A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06121425A (en) * | 1992-07-23 | 1994-04-28 | Kiyoyuki Horii | Passing method for cable |
| US6296231B1 (en) * | 1998-02-05 | 2001-10-02 | Lattice Intellectual Property Ltd. | Pipe threading arrangement |
| JP2017194078A (en) * | 2016-04-18 | 2017-10-26 | 株式会社ディスコ | Process of manufacture of double piping |
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