JPH0769031B2 - Corrugated pipe - Google Patents
Corrugated pipeInfo
- Publication number
- JPH0769031B2 JPH0769031B2 JP2087123A JP8712390A JPH0769031B2 JP H0769031 B2 JPH0769031 B2 JP H0769031B2 JP 2087123 A JP2087123 A JP 2087123A JP 8712390 A JP8712390 A JP 8712390A JP H0769031 B2 JPH0769031 B2 JP H0769031B2
- Authority
- JP
- Japan
- Prior art keywords
- corrugated
- pipe
- corrugated pipe
- tube
- smooth
- 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 - Lifetime
Links
Landscapes
- Joints That Cut Off Fluids, And Hose Joints (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明はコルゲート管に関し、詳細にはゴム輪接合用の
平滑内面受口部を備えた合成樹脂製コルゲート管に関す
るものである。Description: TECHNICAL FIELD The present invention relates to a corrugated tube, and more particularly, to a synthetic resin corrugated tube having a smooth inner surface receiving portion for joining rubber rings.
［従来の技術］ コルゲート管は扁平強度が高く且つ湾曲方向への可撓性
に優れた管である。このコルゲート管を接続する技術と
しては、第２図に示す様に、円筒体の内面中央部にスト
ッパー21aを備えた管継手21に、両方向からコルゲート
管22,22を挿入し接着剤を用いて固定する方法が一般的
である。しかしこの方法では、施工現場にコルゲート管
の他上記管継手も準備する必要がある。そこで現地作業
における部品管理の簡略化と能率改善の観点から、管継
手を必要としないコルゲート管が要望されている。また
第２図の接続構造であると、継手部における扁平挙動が
管中央部のそれと相違する他、曲げ方向への可撓性が著
しく阻害され、コルゲート管の配設上重大な障害とな
る。[Prior Art] A corrugated tube is a tube having high flat strength and excellent flexibility in a bending direction. As a technique for connecting the corrugated pipes, as shown in FIG. 2, the corrugated pipes 22 and 22 are inserted from both directions into a pipe joint 21 having a stopper 21a at the center of the inner surface of the cylindrical body, and an adhesive is used. The method of fixing is common. However, with this method, it is necessary to prepare the above-mentioned pipe joint in addition to the corrugated pipe at the construction site. Therefore, a corrugated pipe that does not require a pipe joint is demanded from the viewpoints of simplification of parts management and improvement of efficiency in on-site work. In the connection structure of FIG. 2, the flatness of the joint differs from that of the central portion of the pipe, and the flexibility in the bending direction is significantly impaired, which is a serious obstacle in the arrangement of the corrugated pipe.
［発明が解決しようとする課題］ 本発明は上記事情に着目してなされたものであって、管
継手なしでも接続でき、しかも接合部の可撓性及び扁平
強度が高いコルゲート管の提供を目的とするものであ
る。[PROBLEMS TO BE SOLVED BY THE INVENTION] The present invention has been made in view of the above circumstances, and an object thereof is to provide a corrugated pipe which can be connected without a pipe joint and which has high flexibility and flatness of a joint portion. It is what
［課題を解決する為の手段］ 上記目的を達成した本発明とは拡径受口部を含む全長に
亘って波形を形成すると共に、一方端に外側への折り返
し部が形成された平滑管を、上記拡径受口部の内面に挿
設してなることを要旨とするものである。[Means for Solving the Problems] The present invention that achieves the above object is a smooth tube having a corrugated shape over the entire length including the expanded diameter receiving portion and an outwardly folded portion at one end. The gist of the present invention is that it is inserted into the inner surface of the expanded diameter receiving portion.
［作用及び実施例］ 本発明者らはコルゲート管に受口部を設けるという第１
目標を掲げ、コルゲート管の片側（必要であれば両側）
に拡径部を作ることを考えた。そこでその部分には波形
を成形せずに平滑部として残し、該平滑部を拡径して受
口部12としたコルゲート管11を開発した（第３図）。し
かしながら該コルゲート管の平滑受口部12は拡径によっ
て薄肉化し、波付管中央部及び添付挿口部に比較して扁
平強度が著しく低下する為、特に高度な安全性が要求さ
れる情報通信ケーブル用の保護管として用いる場合に
は、平滑受口部の長さを長くできないという問題が生じ
（呼び径75に対し、長さは約110mm位までが許容範囲）
地震時における抜け落ちが懸念される他、土圧荷重によ
る破損が懸念され、また運搬及び保管積載等の取扱時に
今まで以上の注意を要するという不具合を生じることが
分かった。また曲げ方向への可撓性においても問題を生
じる。そこで本発明者らは扁平強度を維持する為には拡
径受口部12にも波形成形を施すことが必要と考え、本発
明のコルゲート管を開発したものである。[Operations and Examples] The first of the present inventors is to provide the corrugated tube with the receiving portion.
Set a goal and one side of corrugated pipe (both sides if necessary)
I thought about making an expanded diameter part. Therefore, a corrugated pipe 11 was developed in which the corrugated portion was left as a smooth portion without being shaped, and the smooth portion was expanded to form a receiving portion 12 (Fig. 3). However, since the smooth receiving part 12 of the corrugated pipe is thinned due to the diameter expansion, and the flat strength is remarkably reduced as compared with the center part of the corrugated pipe and the attached insertion part, information communication that requires particularly high safety. When used as a protective tube for cables, there is a problem in that the length of the smooth receiving part cannot be increased (for a nominal diameter of 75, the allowable length is about 110 mm).
In addition to the fear of slipping out during an earthquake, there is a risk of damage due to earth pressure load, and it has been found that there is a problem in that more attention needs to be paid when handling such as transportation and storage loading. In addition, there is a problem in flexibility in the bending direction. Therefore, the inventors of the present invention considered that it is necessary to perform corrugation on the enlarged diameter receiving portion 12 in order to maintain the flat strength, and developed the corrugated tube of the present invention.
本発明のコルゲート管は片受片挿の場合及び両受の場合
を含むが、以下波付拡径受口部1a、波付管中央部1b及び
波付挿口部1cで構成された片受片挿の場合を中心に述べ
る。The corrugated pipe of the present invention includes a case of single-sided piece insertion and a case of double-sided reception. The case of single-sided insertion will be mainly described.
第１図は実施例を示したものであり、波付拡径受口部1a
には、片側に外側への折り返し部2aが形成された平滑管
２が、圧着，接着，融着等の方法で挿設されている。ま
た、上記折り返し部2aと波付拡径受口部1aの管端との間
にはシール剤３が封入されると共に、波付挿口部外周面
にはリング状のパッキン４が環装されて、コルゲート管
接合時の密封性を高める構造となっている。従って本発
明のコルゲート管による接合部は、波付管が２重に形成
されているので扁平強度が高いことはもちろんのこと、
波付管のジャバラ構造によって可撓性も保持できる。但
し接合位置に平滑部がない状態ではゴム輪接合が困難で
あるので、平滑管を拡径受口部に挿設したものである。
本発明に係るコルゲート等の代表例としては、呼び径が
75φであり、平滑管の厚さが2.7mm以下のコルゲート管
が挙げられる。FIG. 1 shows an embodiment of the present invention, in which the corrugated expansion receiving portion 1a is used.
A smooth tube 2 having an outward folded portion 2a formed on one side is inserted therein by a method such as pressure bonding, adhesion, and fusion bonding. Further, a sealant 3 is enclosed between the folded-back portion 2a and the pipe end of the corrugated expanded diameter receiving portion 1a, and a ring-shaped packing 4 is mounted on the outer peripheral surface of the corrugated insertion portion. In addition, it has a structure that enhances the sealing performance when joining the corrugated pipe. Therefore, the corrugated pipe joint of the present invention has a high flatness strength because the corrugated pipe is double formed.
The bellows structure of the corrugated pipe can also maintain flexibility. However, since it is difficult to join the rubber ring when there is no smooth portion at the joining position, a smooth tube is inserted in the expanded diameter receiving portion.
As a typical example of the corrugated body according to the present invention, the nominal diameter is
A corrugated tube having a diameter of 75φ and a smooth tube having a thickness of 2.7 mm or less can be used.
ところで本発明者らが第３図に示す接合状態にある塩化
ビニル樹脂製コルゲート管を用いて、接合部各位置にお
ける扁平試験を行なったところ、最大歪が発生するのは
平滑受口部ではなく挿口管におけるパッキンを装着した
谷部内周面であることが明らかとなった。従って拡径受
口部を波形に形成して扁平強度の向上が図られた本発明
のコルゲート管においては、平滑管はその内面に挿口部
を接合できる程度の厚さを有しておれば良く、接合部に
おける可撓性を損なわないという観点からも薄く形成す
ることが望ましい。従って平滑管の厚さは、コルゲート
管の口径及び厚さにかかわらず3.5mm以下が好ましい。By the way, when the present inventors conducted a flatness test at each position of the joint using the vinyl chloride resin corrugated pipe in the jointed state shown in FIG. 3, it was found that the maximum strain occurred not in the smooth receiving portion. It was clarified that it was the inner peripheral surface of the trough where packing was attached to the mouthpiece. Therefore, in the corrugated tube of the present invention in which the expanded diameter receiving portion is formed in a corrugated shape to improve the flat strength, the smooth tube has a thickness that allows the insertion portion to be joined to the inner surface thereof. It is desirable that the thin portion is formed from the viewpoint that flexibility at the joint portion is not impaired. Therefore, the thickness of the smooth tube is preferably 3.5 mm or less regardless of the diameter and thickness of the corrugated tube.
尚第１図の実施例は本発明の代表例を示したものであ
り、本発明の趣旨に徴して種々設計変更したものであっ
ても良い。The embodiment shown in FIG. 1 shows a typical example of the present invention, and various design changes may be made in view of the gist of the present invention.
［発明の効果］ 本発明は以上の様に構成されているので、管継手なしで
も接続でき、しかもコルゲート管の有する可撓性及び扁
平強度を損なうことのないコルゲート管を提供できるこ
ととなった。EFFECTS OF THE INVENTION Since the present invention is configured as described above, it is possible to provide a corrugated tube that can be connected without a pipe joint and that does not impair the flexibility and flatness of the corrugated tube.
第１図は本発明の代表的な実施例を示す一部破断側面
図、第２図はコルゲート管の従来の継手方法を示す一部
断面図、第３図は平滑受口部付コルゲート管の一部破断
側面図である。 １…コルゲート管、1a…波付拡径受口部 1b…波付管中央部、1c…波付挿口部 ２…平滑管、2a…折り返し部 ３…シール剤、４…パッキンFIG. 1 is a partially cutaway side view showing a typical embodiment of the present invention, FIG. 2 is a partial cross-sectional view showing a conventional joint method for corrugated pipes, and FIG. 3 is a corrugated pipe with a smooth socket. It is a partially broken side view. DESCRIPTION OF SYMBOLS 1 ... Corrugated pipe, 1a ... Corrugated expansion receiving part 1b ... Corrugated pipe central part, 1c ... Corrugated insertion part 2 ... Smooth pipe, 2a ... Folding part 3 ... Sealing agent, 4 ... Packing
───────────────────────────────────────────────────── フロントページの続き (72)発明者 野田 亨 大阪府堺市石津北町64番地 久保田鉄工株 式会社ビニルパイプ工場内 (72)発明者 白川 淳一 東京都千代田区内幸町１丁目１番６号 日 本電信電話株式会社内 (72)発明者 松宮 直規 東京都千代田区内幸町１丁目１番６号 日 本電信電話株式会社内 (56)参考文献 実開 昭53−112818（ＪＰ，Ｕ) 実開 昭51−112303（ＪＰ，Ｕ) 実開 昭62−133084（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toru Noda 64 Ishizukita-machi, Sakai City, Osaka Prefecture Inside the vinyl pipe factory of Kubota Iron Works Co., Ltd. (72) Junichi Shirakawa 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Date This telegraph telephone company (72) Inventor Naoki Matsumiya 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (56) Bibliographic reference Sho 53-112818 (JP, U) Actual exploitation Sho 51-112303 (JP, U) Actually opened 62-133084 (JP, U)
Claims (1)
すると共に、一方端に外側への折り返し部が形成された
平滑管を、上記拡径受口部の内面に挿設してなることを
特徴とするコルゲート管。1. A smooth tube having a corrugated shape over the entire length including the expanded diameter receiving portion and having an outward folded portion at one end is inserted into the inner surface of the expanded diameter receiving portion. A corrugated tube characterized by being formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2087123A JPH0769031B2 (en) | 1990-03-30 | 1990-03-30 | Corrugated pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2087123A JPH0769031B2 (en) | 1990-03-30 | 1990-03-30 | Corrugated pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03288086A JPH03288086A (en) | 1991-12-18 |
| JPH0769031B2 true JPH0769031B2 (en) | 1995-07-26 |
Family
ID=13906181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2087123A Expired - Lifetime JPH0769031B2 (en) | 1990-03-30 | 1990-03-30 | Corrugated pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0769031B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2507151Y2 (en) * | 1993-05-14 | 1996-08-14 | 木曽興業株式会社 | Corrugated pipe connector |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51112303U (en) * | 1975-03-08 | 1976-09-10 | ||
| JPS53112818U (en) * | 1977-02-17 | 1978-09-08 |
-
1990
- 1990-03-30 JP JP2087123A patent/JPH0769031B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03288086A (en) | 1991-12-18 |
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