JPH076481Y2 - Mandrel for pipeline passage test - Google Patents

Mandrel for pipeline passage test

Info

Publication number
JPH076481Y2
JPH076481Y2 JP1988155232U JP15523288U JPH076481Y2 JP H076481 Y2 JPH076481 Y2 JP H076481Y2 JP 1988155232 U JP1988155232 U JP 1988155232U JP 15523288 U JP15523288 U JP 15523288U JP H076481 Y2 JPH076481 Y2 JP H076481Y2
Authority
JP
Japan
Prior art keywords
mandrel
connecting rod
divided bodies
pipeline
divided
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
Application number
JP1988155232U
Other languages
Japanese (ja)
Other versions
JPH0275506U (en
Inventor
睦美 加茂
昭彦 ▲高▼士
Original Assignee
日本電話施設株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 日本電話施設株式会社 filed Critical 日本電話施設株式会社
Priority to JP1988155232U priority Critical patent/JPH076481Y2/en
Publication of JPH0275506U publication Critical patent/JPH0275506U/ja
Application granted granted Critical
Publication of JPH076481Y2 publication Critical patent/JPH076481Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/04Wave modes and trajectories
    • G01N2291/044Internal reflections (echoes), e.g. on walls or defects

Landscapes

  • A Measuring Device Byusing Mechanical Method (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Description

【考案の詳細な説明】 〈産業上の利用分野〉 被試験管路の一端から挿入されて他端まで通過できるか
否かにより管路の直線性を検査するようにした管路通過
試験用マンドレルに関する。
[Detailed Description of the Invention] <Industrial field of application> A mandrel for pipeline passage test, which is designed to inspect the straightness of the pipeline depending on whether it can be inserted from one end of the pipeline to be tested and passed to the other end. Regarding

〈従来の技術〉 従来、例えば第9図に示すように、地下に電話ケーブル
10を保護管路12内に通した状態で埋設し、そのケーブル
接続部に地下空間14を設けて、作業者Mがマンホール16
から入り、点検,補修や改修等を行うものがある。ここ
で地下空間14においては、電話ケーブル10が保護管路12
から引き出されて、ケーブル止め装置18に固定され、隣
の保護管路12内に導かれるのが普通である。
<Prior Art> Conventionally, as shown in FIG. 9, for example, a telephone cable is installed underground.
10 is buried in a state that it is passed through the protective conduit 12, and an underground space 14 is provided in the cable connection portion thereof, and the worker M is manhole 16
Some come in from the center and perform inspection, repair and repair. Here, in the underground space 14, the telephone cable 10 is connected to the protection pipe 12
It is usually pulled out of the box, fixed to the cable stop device 18 and guided into the adjacent protective line 12.

ところで、このような既設のケーブル埋設構造におい
て、ケーブル本数を増やすための増管工事(保護管路12
の増設)を行う場合、第10図に示すように、例えば5m程
度の管20を多数連結して、隣合う地下空間14までの長さ
が例えば200mほどの新たな保護管路12を埋設することと
なる。このような増設埋設工事の施行後、電話ケーブル
10の挿入前に、その増設された保護管路12の直線性が所
定の基準を満たしているかどうかを検査するために、保
護管路12の内径より若干小さい外径を有する軸状のマン
ドレルがその保護管路12内をスムーズに通過するかどう
かをみる管路通過試験が行われる場合がある。そのマン
ドレルは、長さが例えば60cm,外径が例えば6〜7cm程度
のものが使用される。
By the way, in such an existing cable burial structure, pipe expansion work (protection pipeline 12
10), a large number of pipes 20 of, for example, about 5 m are connected to each other, and a new protective pipe 12 having a length of, for example, about 200 m to the adjacent underground space 14 is buried as shown in FIG. It will be. After carrying out such additional burying work, telephone cable
Before inserting 10, in order to inspect whether the linearity of the added protection pipeline 12 satisfies a predetermined standard, an axial mandrel having an outer diameter slightly smaller than the inner diameter of the protection pipeline 12 is used. A pipeline passage test may be performed to see whether or not the protective pipeline 12 passes smoothly. The mandrel having a length of, for example, 60 cm and an outer diameter of, for example, 6 to 7 cm is used.

〈考案が解決しようとする課題〉 そのようなマンドレルを保護管路12の一端から挿入する
際、マンドレルを保護管路12とほぼ同軸的な姿勢に保持
することが必要となるが、そのとき、既設のケーブル10
に干渉してマンドレルが入らないことがしばしば生じ
る。その場合、従来では、既設のケーブル10をケーブル
止め装置18の拘束から解き、干渉しない位置まで移動さ
せてからマンドレルを挿入していたが、移動させた既存
のケーブル10を再びケーブル止め装置18に固定しなけれ
ばならず、作業性が悪い問題がある。
<Problems to be solved by the invention> When inserting such a mandrel from one end of the protective conduit 12, it is necessary to hold the mandrel in a posture substantially coaxial with the protective conduit 12, at that time, Existing cable 10
It often happens that the mandrel does not enter due to interference with. In that case, in the conventional case, the existing cable 10 was released from the constraint of the cable stopper 18, and the mandrel was inserted after being moved to a position where it did not interfere, but the moved existing cable 10 was again used for the cable stopper 18. There is a problem that workability is poor because it must be fixed.

〈課題を解決するための手段〉 この考案は、以上のような事情のもとに為されたもので
あり、その要旨とするところは、以下のようにマンドレ
ルを分割構造とした点にある。
<Means for Solving the Problems> The present invention has been made under the circumstances as described above, and the gist thereof is that the mandrel has a divided structure as follows.

すなわち、 (a)マンドレルを軸方向に所定の寸法をもって分割し
て複数の短軸状のマンドレル分割体とする。
That is, (a) the mandrel is divided into a plurality of short-axis mandrel divided bodies with a predetermined dimension in the axial direction.

(b)それら複数のマンドレル分割体にわたって軸方向
に貫通する貫通孔を形成する。
(B) A through hole penetrating in the axial direction is formed over the plurality of mandrel divided bodies.

(c)それらのマンドレル分割体を各貫通孔において連
結棒に直列に挿入可能とする。
(C) The mandrel divided bodies can be inserted in series into the connecting rod in each through hole.

(d)その連結棒はそれらマンドレル分割体の接合位置
にほぼ対応する複数位置においてそれぞれ連結棒の軸線
を含む一平面内での屈曲が可能に形成する。
(D) The connecting rod is formed to be bendable within a plane including the axis of the connecting rod at a plurality of positions substantially corresponding to the joining positions of the mandrel divided bodies.

(e)その連結棒を介して複数のマンドレル分割体を直
線的かつ一体的に締結する締結手段を設ける。
(E) Providing a fastening means for linearly and integrally fastening a plurality of mandrel divided bodies via the connecting rod.

なお、この締結手段として、例えば連結棒の端部にネジ
機構を設けることができる。
As this fastening means, for example, a screw mechanism can be provided at the end of the connecting rod.

〈作用および効果〉 このような分割構造のマンドレルによれば、管路への挿
入に際して干渉するもの(例えば既存のケーブル等)が
ある場合には、それとの干渉が避けられるように連結棒
を屈曲させつつ、各マンドレル分割体を直列に挿入し
て、締結手段により一体的に締結することにより、マン
ドレルを支障なく管路へ挿入することができる。従っ
て、干渉物をいったん取除いたりしなくて済み、管路通
過試験の手数が軽減でき、作業能率が向上する。
<Operations and effects> According to the mandrel having such a divided structure, when there is something that interferes with the insertion into the conduit (for example, an existing cable), the connecting rod is bent so as to avoid the interference with it. While each mandrel divided body is inserted in series while being fastened integrally by the fastening means, the mandrel can be inserted into the duct without trouble. Therefore, it is not necessary to remove the interfering substances once, the number of steps for the pipe passage test can be reduced, and the work efficiency is improved.

〈実施例〉 以下、本考案の一実施例を図面に基づいて説明する。<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

第1図にその一実施例である分割構造のマンドレル22を
示す。このマンドレル22は円形断面の軸状(棒状)部材
であるが、軸方向にほぼ等分に4分割されて、4個のマ
ンドレル分割体24を備えている。これらのマンドレル分
割体24は、第6図から明らかなように同一軸線上に整列
した状態で、その軸線の方向に貫通する円形断面の貫通
孔26をそれぞれ有し、いずれも円筒状の短軸形態をなし
ている。
FIG. 1 shows a mandrel 22 having a divided structure which is an embodiment thereof. The mandrel 22 is a shaft-shaped (bar-shaped) member having a circular cross section, but is divided into four substantially equal parts in the axial direction and is provided with four mandrel divided bodies 24. As shown in FIG. 6, these mandrel split bodies 24 each have a through hole 26 having a circular cross section that penetrates in the direction of the axis lined up on the same axis line. It has a form.

そして、各マンドレル分割体24は、一端に偏平円錘台状
の凸部28(換言すれば先細りのテーパ面)を、また他端
にそれに対応する凹部30を同心的に備えており、隣り合
う分割体24同士の接合部では、それら凸部28と凹部30と
が嵌り合って互いに同心性が保たれるようになってい
る。なお、両端に位置するマンドレル分割体24には、マ
ンドレル22を構成した状態でその両端に当たる縁部分に
面取り部32が形成されている。
Further, each mandrel divided body 24 is concentrically provided with a flat truncated cone-shaped convex portion 28 (in other words, a tapered tapered surface) at one end and a corresponding concave portion 30 at the other end, which are adjacent to each other. At the joint portion between the divided bodies 24, the convex portions 28 and the concave portions 30 are fitted to each other so as to maintain concentricity with each other. The mandrel split bodies 24 located at both ends are provided with chamfered portions 32 at the edge portions corresponding to both ends of the mandrel 22 in the state where the mandrel 22 is configured.

そして、これらのマンドレル分割体24は、第1図に示す
ように各貫通孔26において連結棒34に差入れられ、言い
換えば連結棒34が各マンドレル分割体24を貫くように設
けられている。この連結棒34は、マンドレル22の全長と
ほぼ等しい長さを有し、各マンドレル分割体24の貫通孔
26より十分細い円形断面の軸状部材であるが、それらマ
ンドレル分割体24の接合位置に対応する3位置において
自身の軸線を含む一平面内で屈曲可能とされている。す
なわち、第3図〜第5図および第7図,第8図から明ら
かなように、連結棒34はそれら3位置においては分断さ
れることにより4分割され、かつピン36により相互に回
動可能に連結されて、第8図に示すように各ピン36にお
いて90°程度屈曲できるようになっているのである。第
4図および第5図に示すように、ピン36による連結部で
は、互いに隣合う棒材38の一方に直径方向に溝40が、ま
た他方にこれに嵌る舌片状の突起42が形成されており、
この部分を貫通する上記ピン36は、その両端が棒材38の
外周面から突出しないようにされている。
Then, these mandrel divided bodies 24 are inserted into the connecting rods 34 in the respective through holes 26 as shown in FIG. 1, in other words, the connecting rods 34 are provided so as to penetrate the respective mandrel divided bodies 24. The connecting rod 34 has a length substantially equal to the entire length of the mandrel 22, and has a through hole of each mandrel divided body 24.
Although it is a shaft-shaped member having a circular cross section sufficiently thinner than 26, it can be bent in one plane including its own axis at three positions corresponding to the joining positions of the mandrel divided bodies 24. That is, as is clear from FIGS. 3 to 5, 7 and 8, the connecting rod 34 is divided into four at these three positions by being divided, and can be rotated relative to each other by the pin 36. The pin 36 can be bent by about 90 ° as shown in FIG. As shown in FIGS. 4 and 5, in the connecting portion by the pins 36, a groove 40 is formed in one of the rods 38 adjacent to each other in the diametrical direction, and a tongue-shaped projection 42 to be fitted therein is formed in the other. And
Both ends of the pin 36 penetrating this portion are designed not to project from the outer peripheral surface of the bar 38.

第7図に示すように、連結棒34の両端部には、軸方向に
雌ネジ穴44がそれぞれ形成され、各雌ネジ穴44に座板46
介して、ネジ部材48が雄ネジ部50においてねじ込まれる
ようになっている。各ネジ部材48は、雄ネジ部50と一体
にリング状の抓み部52を備え、ここを抓んでねじ込み操
作ができるようにされ、各座板46は両端に位置する前記
マンドレル分割体24の凹部30に丁度嵌るものである。そ
して、本実施例では、このようなネジ部材48,雌ネジ穴4
4等からなネジ機構が、連結棒34を介して4個のマンド
レル分割体24を一体的かつ直線的に締結する締結手段を
構成している。
As shown in FIG. 7, female screw holes 44 are axially formed at both ends of the connecting rod 34, and a seat plate 46 is formed in each female screw hole 44.
The screw member 48 is adapted to be screwed in at the male screw portion 50 via the screw member 48. Each screw member 48 is provided with a male-threaded portion 50 and a ring-shaped recessed portion 52, which is adapted to be screwed in by penetrating the screwed portion 52, and each seat plate 46 of the mandrel split body 24 located at both ends. It just fits into the recess 30. Further, in the present embodiment, such a screw member 48, the female screw hole 4
A screw mechanism composed of four or the like constitutes a fastening means for fastening the four mandrel divided bodies 24 integrally and linearly via the connecting rod 34.

次に、以上のような分割式マンドレル22を、第10図に示
す増管工事施行後の保護管路12に挿入する場合におい
て、好適な使用方法の一例を説明する。
Next, an example of a suitable usage method in the case of inserting the split mandrel 22 as described above into the protective conduit 12 after the pipe increasing work shown in FIG. 10 will be described.

いま、マンドレル22は第6図、第7図のようにマンドレ
ル分割体24,連結棒34等が個々に分離された状態にある
とする。まず、連結棒34の前端(例えば第1図において
左端)に座板46を介してネジ部材48をねじ込み、一種の
抜止めたるストッパを形成し、その後最初のマンドレル
分割体24を連結棒34に差し通し、このマンドレル分割体
24を保護管路12の開口に挿入する。なお、ネジ部材48の
リング状抓み部52には、マンドレル22を移動させるため
の図示しないワイヤが接続される。
Now, it is assumed that the mandrel 22 is in a state where the mandrel divided body 24, the connecting rod 34, etc. are individually separated as shown in FIGS. 6 and 7. First, a screw member 48 is screwed into the front end (for example, the left end in FIG. 1) of the connecting rod 34 via a seat plate 46 to form a kind of stopper to prevent the removal, and then the first mandrel divided body 24 is attached to the connecting rod 34. Through this mandrel split body
Insert 24 into the opening of protective line 12. A wire (not shown) for moving the mandrel 22 is connected to the ring-shaped recess 52 of the screw member 48.

そして、干渉するおそれのある既設の電話ケーブル10
(第9図)を避けるように連結棒34を適宜屈曲させ、そ
の状態で次のマンドレル分割体24を連結棒34に差し通
す。このように連結棒34に差し通したマンドレル分割体
24は、保護管路12内に順次押込むようにし、同様にして
3番目,4番目の分割体24を連結棒34に入れ込んだ後、そ
の連結棒34を一直線状に保った状態で、それの後端に座
板46を介して残るネジ部材48をねじ込み、締付ける。
And the existing telephone cable 10 that may interfere
The connecting rod 34 is appropriately bent so as to avoid (Fig. 9), and in that state, the next mandrel divided body 24 is inserted into the connecting rod 34. The mandrel split body inserted through the connecting rod 34 in this way
24 is sequentially pushed into the protective conduit 12, and similarly, after the third and fourth divided bodies 24 are put into the connecting rod 34, the connecting rod 34 is kept in a straight line. The remaining screw member 48 is screwed into the rear end through the seat plate 46 and tightened.

これにより第1図のように4個のマンドレル分割体24が
一体化されて、全体としてひとつのマンドレル22とな
り、これが保護管路12内に収された状態となる。その結
果、既設のケーブル10があっても、それを移動させたり
しないでマンドレル22の保護管路12への挿入を完了し、
上述のワイヤにより迅速に通過試験を開始することがで
きる。
As a result, as shown in FIG. 1, the four mandrel split bodies 24 are integrated into one mandrel 22 as a whole, and the mandrel 22 is accommodated in the protective conduit 12. As a result, even if there is an existing cable 10, complete insertion of the mandrel 22 into the protective conduit 12 without moving it.
The wire described above allows the passage test to be started quickly.

以上の実施例は文字通り例示であって、本考案がこの記
載に限定して解釈されるものでないことは勿論である。
Needless to say, the above embodiments are literally examples, and the present invention should not be construed as being limited to this description.

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

第1図は本考案の一実施例である分割式マンドレルの断
面図、第2図はその側面図、第3図はそのマンドレルの
接合部の拡大断面図、第4図は第3図の側面図、第5図
は連結棒の屈曲部の拡大図、第6図はマンドレル分割体
に切離した状態の正面図、第7図は連結棒とネジ部材等
を示す正面図、第8図はその連結棒の屈曲形態の一例を
示す正面図、第9図は地下電話ケーブルの埋設構造の具
体例を簡略に示す断面図、第10図はその増管工事の具体
例を簡略に示す断面図である。 10:電話ケーブル 12:保護管路 18:ケーブル止め装置 22:マンドレル 24:マンドレル分割体 26:貫通孔 34:連結棒 36:ピン 44:雌ネジ穴 46:座板 48:ネジ部材 50:雄ネジ部
FIG. 1 is a sectional view of a split type mandrel according to an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is an enlarged sectional view of a joint portion of the mandrel, and FIG. 4 is a side view of FIG. 5 and 5 are enlarged views of the bent portion of the connecting rod, FIG. 6 is a front view in a state in which the connecting rod is separated into mandrel split bodies, FIG. 7 is a front view showing the connecting rod and screw members, and FIG. FIG. 9 is a sectional view showing a concrete example of a buried structure of an underground telephone cable, and FIG. 10 is a sectional view showing a concrete example of the pipe expansion work. is there. 10: Telephone cable 12: Protection line 18: Cable stopper 22: Mandrel 24: Mandrel division 26: Through hole 34: Connecting rod 36: Pin 44: Female screw hole 46: Seat plate 48: Screw member 50: Male screw Department

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】被試験管路の一端から挿入されて他端まで
通過できるか否かにより前記管路の直線性を検査する軸
状のマンドレルであって、 そのマンドレルを軸方向に所定の寸法をもって分割して
複数の短軸状のマンドレル分割体とし、かつ、それら複
数のマンドレル分割体にわたって軸方向に貫通する貫通
孔を形成して、それらのマンドレル分割体を各貫通孔に
おいて連結棒に直列に挿入可能とし、またその連結棒は
それらマンドレル分割体の接合位置にほぼ対応する複数
位置においてそれぞれ連結棒の軸線を含む一平面内での
屈曲が可能に形成し、さらにその連結棒を介して前記複
数のマンドレル分割体を直線的かつ一体的に締結する締
結手段を設けたことを特徴とする管路通過試験用マンド
レル。
1. A shaft-shaped mandrel for inspecting the linearity of the pipeline by checking whether or not it can be inserted from one end of the pipeline to be tested and passed to the other end, and the mandrel has a predetermined dimension in the axial direction. To form a plurality of short-axis mandrel divided bodies, and form through-holes penetrating through the plurality of mandrel divided bodies in the axial direction, and these mandrel divided bodies are connected in series to the connecting rod at each through-hole. The connecting rod is formed to be bendable in a plane including the axis of the connecting rod at a plurality of positions substantially corresponding to the joining positions of the mandrel divided bodies, and further through the connecting rod. A conduit passage test mandrel comprising a fastening means for linearly and integrally fastening the plurality of mandrel divided bodies.
JP1988155232U 1988-11-29 1988-11-29 Mandrel for pipeline passage test Expired - Lifetime JPH076481Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988155232U JPH076481Y2 (en) 1988-11-29 1988-11-29 Mandrel for pipeline passage test

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988155232U JPH076481Y2 (en) 1988-11-29 1988-11-29 Mandrel for pipeline passage test

Publications (2)

Publication Number Publication Date
JPH0275506U JPH0275506U (en) 1990-06-08
JPH076481Y2 true JPH076481Y2 (en) 1995-02-15

Family

ID=31432679

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988155232U Expired - Lifetime JPH076481Y2 (en) 1988-11-29 1988-11-29 Mandrel for pipeline passage test

Country Status (1)

Country Link
JP (1) JPH076481Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5174361B2 (en) * 2007-02-27 2013-04-03 株式会社クボタ In-pipe inspection device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0711403B2 (en) * 1983-05-02 1995-02-08 国土防災技術株式会社 Pipe bend detection device

Also Published As

Publication number Publication date
JPH0275506U (en) 1990-06-08

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