JPH06193086A - Waterproof connecting method for flexible tube and underground box - Google Patents
Waterproof connecting method for flexible tube and underground boxInfo
- Publication number
- JPH06193086A JPH06193086A JP4359828A JP35982892A JPH06193086A JP H06193086 A JPH06193086 A JP H06193086A JP 4359828 A JP4359828 A JP 4359828A JP 35982892 A JP35982892 A JP 35982892A JP H06193086 A JPH06193086 A JP H06193086A
- Authority
- JP
- Japan
- Prior art keywords
- flexible tube
- side wall
- underground box
- mounting plate
- cable
- 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
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電力用、通信用等のケ
ーブルを引き込むための埋設可撓管をハンドホール、マ
ンホール等の地中箱に接続するために用いる可撓管と地
中箱との防水接続工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible tube and an underground box used for connecting a buried flexible tube for drawing in a cable for electric power, communication, etc. to an underground box such as a handhole or a manhole. Regarding the waterproof connection construction method with.
【０００２】[0002]
【従来の技術】従来、地中に埋設し、電力用、通信用等
のケーブルを引き込むための波付硬質ポリエチレン管
を、例えば、コンクリート製のハンドホールの側壁に接
続するには、作業現場において、図５に示すように、ハ
ンドホール１の側壁３に開口部８を形成し、この開口部
８に鎖線で示す埋設済みの波付硬質ポリエチレン管２１
の端部を挿入し、この波付硬質ポリエチレン管２１の端
部内側にハンドホール１の内側からベルマウス５１の基
部を取り付け、その後、側壁３の開口８部にモルタル
（図示せず）を充填して開口部を閉塞していた。2. Description of the Related Art Conventionally, in order to connect a corrugated rigid polyethylene pipe, which is buried in the ground and used to draw cables for electric power, communication, etc., to a side wall of a concrete handhole, for example, at a work site. As shown in FIG. 5, an opening 8 is formed in the side wall 3 of the handhole 1, and a buried corrugated rigid polyethylene pipe 21 shown by a chain line is formed in the opening 8.
The end of the bell mouth 51 is attached from the inside of the handhole 1 to the inside of the end of the corrugated rigid polyethylene pipe 21, and then the opening 8 of the side wall 3 is filled with mortar (not shown). Then the opening was closed.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
ような従来技術では、開口部８の充分な防水効果を得る
ことができず、特に、水位の高い地域においては、浸水
によりハンドホール１内が満水となり、引き込まれたケ
ーブルが水没しているのが実状である。ケーブルの水没
状態が長期間にわたって続くと劣化し、寿命が短くな
る。また、上記のようにハンドホール１内に水が溜まっ
ていると、ケーブル増設時等において、排水作業に多く
の時間を要し、作業能率に劣る。また、ハンドホール１
の開口部８にモルタルを充填した後、このモルタルが乾
燥するまで、土を埋め戻すことができず、作業性に劣る
ばかりでなく、この間、作業現場を危険な状態に放置す
ることになる。更に、図５に鎖線で示すように、ベルマ
ウス５２がハンドホール１内に突出しているため、直角
方向の側壁３の開口部８に接続された波付硬質ポリエチ
レン管２１にケーブルを引き込む際には、各ベルマウス
５１の先端でその軸心と水平方向で直交する線ａが互い
に交差する点ｃを中心とする半径ｒで上記ケーブルを湾
曲させなければならない。このため、実質的には側壁３
の内面が線ａに位置することになり、直角方向の波付硬
質ポリエリレン管２１の距離が近く、特に、太いケーブ
ルを引き込む場合には、ケーブルの曲率が小さくなり、
引き込むことが困難となる。このような場合、ケーブル
の曲率を大きくするため、ハンドホール１の全体形状を
大きくしなければならない。しかも、上記のように開口
部８にモルタルを充填して波付硬質ポリエチレン管２１
を接続するため、開口部８の大きさを必要以上に大きく
形成しなければならず。これもハンドホール１の全体形
状が大きくなる原因となる。However, with the above-mentioned conventional techniques, it is not possible to obtain a sufficient waterproof effect for the opening portion 8, and especially in an area with a high water level, the inside of the handhole 1 may be damaged by flooding. The actual situation is that the cable is full and the cable that has been pulled in is submerged. If the cable is submerged for a long time, it will deteriorate and its life will be shortened. Further, if water is accumulated in the handhole 1 as described above, it takes a lot of time for draining work when a cable is added, and the work efficiency is poor. Also, hand hole 1
After filling the opening 8 with mortar, the soil cannot be backfilled until the mortar dries, which is not only inferior in workability but also leaves the work site in a dangerous state during this time. Further, as shown by the chain line in FIG. 5, since the bell mouth 52 projects into the handhole 1, when the cable is drawn into the corrugated rigid polyethylene pipe 21 connected to the opening 8 of the side wall 3 in the perpendicular direction, Must bend the cable at a radius r centered on a point c where the lines a perpendicular to the axis of the bell mouth 51 in the horizontal direction intersect each other at the tip of each bell mouth 51. Therefore, the side wall 3 is substantially
Since the inner surface of is located at the line a, the distance of the corrugated rigid polyerylene tube 21 in the right angle direction is short, and especially when a thick cable is drawn in, the curvature of the cable becomes small,
It becomes difficult to pull in. In such a case, the overall shape of the handhole 1 must be increased in order to increase the curvature of the cable. Moreover, the corrugated hard polyethylene pipe 21 is filled with mortar in the opening 8 as described above.
In order to connect the above, the size of the opening 8 must be made larger than necessary. This also causes the overall shape of the handhole 1 to become large.
【０００４】本発明は、上記のような従来の問題を解決
するものであり、ハンドホール等の地中箱の側壁に対し
て可撓管を確実なシール状態で接続して地中箱の内部へ
の浸水を防止することができ、したがって、引き込まれ
たケーブルの水没を防止して長寿命化を図ることがで
き、しかも、ケーブル増設時の作業能率を向上させるこ
とができ、また、可撓管の地中箱に対する接続時間を短
縮することができ、したがって、早期に土を埋戻すこと
ができて作業性を向上させることができるだけでなく、
早期に作業現場の安全を回復することができ、更には地
中箱の小型化を図ることができるようにした可撓管と地
中箱との防水接続工法を提供することを目的とするもの
である。The present invention solves the above-mentioned conventional problems, and a flexible tube is connected to a side wall of an underground box such as a handhole in a surely sealed state so that the inside of the underground box is connected. Water can be prevented, so that the cable that has been pulled in can be prevented from submersion in water, and the service life can be extended. Moreover, the work efficiency when adding cables can be improved, and the flexibility can be improved. Not only can the connection time of the pipe to the underground box be shortened, therefore the soil can be backfilled early and the workability can be improved.
An object of the present invention is to provide a waterproof connection construction method between a flexible tube and an underground box that can restore the safety of the work site at an early stage and further reduce the size of the underground box. Is.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
の本発明の技術的手段は、合成樹脂製の取付板に短い可
撓管の一端をシール状態で接続し、地中箱の側壁に形成
された開口部を閉塞するように、上記側壁に上記取付板
をその外面周縁部に重ねた金属製の補強枠と共に締着手
段を用いてシール状態に取り付け、上記可撓管の他端と
埋設可撓管の一端をカップリングを用いてシール状態に
接続するようにしたものである。The technical means of the present invention for achieving the above-mentioned object is to connect one end of a short flexible tube to a mounting plate made of synthetic resin in a sealed state, and to connect it to the side wall of the underground box. The mounting plate is attached to the side wall in a sealed state using a fastening means together with a metal reinforcing frame that is overlapped with the outer peripheral edge of the side wall so as to close the formed opening. One end of the embedded flexible tube is connected in a sealed state using a coupling.
【０００６】上記地中箱は、新設の場合には、開口部を
あらかじめ工場等で形成し、既設でケーブルを増設する
場合には、開口部を作業現場で形成する。In the underground box, the opening is formed in advance in a factory or the like in the case of new installation, and the opening is formed in the work site in the case of additionally installing cables.
【０００７】上記取付板に強化プラスチックを用いるこ
とにより、その成形の際に可撓管を簡単にインサート成
形してシール状態に接続することができる。By using the reinforced plastic for the mounting plate, the flexible tube can be easily insert-molded and connected in a sealed state at the time of molding.
【０００８】上記締着手段として、地中箱の成形後、そ
の側壁の複数箇所に打設され、若しくは地中箱の成形時
にその側壁にあらかじめ埋設されたアンカー（プラグ）
と、取付板および補強枠に形成された取付穴に挿通さ
れ、上記アンカーに螺入されるボルトと、上記補強枠と
ボルトの頭部との間に介在されるワッシャを用いること
ができる。As the fastening means, anchors (plugs) are formed at a plurality of locations on the side wall of the underground box after molding, or embedded in the side wall at the time of molding the underground box.
It is possible to use a bolt that is inserted into a mounting hole formed in the mounting plate and the reinforcing frame and is screwed into the anchor, and a washer that is interposed between the reinforcing frame and the head of the bolt.
【０００９】上記取付板を上記地中箱の側壁に対してシ
ールするには、締着手段を用いて締着する前に上記取付
板と側壁との間にシール材を介在させ、更に、締着後、
取付板の外周と側壁との間にコーキング材を充填するこ
とができる。In order to seal the mounting plate to the side wall of the underground box, a sealing material is interposed between the mounting plate and the side wall before tightening by using a tightening means, and the tightening is further performed. After wearing
A caulking material may be filled between the outer periphery of the mounting plate and the side wall.
【００１０】[0010]
【作用】上記のように構成された本発明によれば、合成
樹脂製の取付板に短い可撓管の一端をシール状態で接続
し、取付板および補強枠を地中箱の側壁に締着手段を用
いてシール状態に取り付け、短い可撓管の他端と埋設可
撓管の一端をカップリングを用いてシール状態に接続す
るので、埋設可撓管と地中箱の側壁とを確実なシール状
態で接続して地中箱の内部への浸水を防止することがで
きる。また、取付板に短い可撓管の一端をシール状態で
接続する作業は、あらかじめ工場等で行うことができる
ので、作業現場において、取付板を補強枠と共に地中箱
の側壁に締着手段を用いてシール状態で取り付け、短い
可撓管と埋設可撓管とをカップリングを用いてシール状
態に接続することにより、埋設可撓管の地中箱に対する
接続作業を完了し、その接続作業を短時間で行うことが
できる。更に、地中箱の側壁外面に取り付ける取付板に
可撓管を連通させるので、直角方向の側壁の開口部に接
続した可撓管にケーブルを引き込む際には、各側壁の外
面が互いに交差する点を中心とする半径でケーブルを湾
曲させ、実質的には側壁の内面が外面に位置することに
なり、直角方向の可撓管の距離が近く、特に、太いケー
ブルを引き込む場合であっても、地中箱の全体形状を大
きくすることなく、ケーブルの曲率を大きくして容易に
引き込むことができる。しかも、開口部にはモルタル等
を充填しないので、必要以上に大きく形成しなくて済
む。According to the present invention constructed as described above, one end of a short flexible tube is connected to a mounting plate made of synthetic resin in a sealed state, and the mounting plate and the reinforcing frame are fastened to the side wall of the underground box. Since the other end of the short flexible tube and the one end of the embedded flexible tube are connected in a sealed state by using a coupling, the embedded flexible tube and the side wall of the underground box can be securely connected. By connecting in a sealed state, it is possible to prevent water from entering the inside of the underground box. Also, the work of connecting the one end of the short flexible tube to the mounting plate in a sealed state can be performed in advance in a factory or the like, so at the work site, the mounting plate together with the reinforcing frame should be fastened to the side wall of the underground box by tightening means. Installed in a sealed state by using, and by connecting the short flexible tube and the embedded flexible tube in a sealed state using a coupling, the connection work of the embedded flexible tube to the underground box is completed, and the connection work is performed. It can be done in a short time. Further, since the flexible tube is made to communicate with the mounting plate attached to the outer surface of the side wall of the underground box, when the cable is pulled into the flexible tube connected to the opening of the side wall in the right angle direction, the outer surfaces of the respective side walls intersect each other. The cable is curved with a radius centered on the point, and the inner surface of the side wall is substantially located on the outer surface, and the flexible tube is located at a short distance in the right angle direction, and even when a thick cable is drawn in. The curvature of the cable can be increased and the cable can be easily pulled in without increasing the overall shape of the underground box. Moreover, since the opening is not filled with mortar or the like, it does not need to be formed larger than necessary.
【００１１】[0011]
【実施例】以下、本発明の一実施例について図面を参照
しながら説明する。図１ないし図４は本発明の一実施例
における可撓管と地中箱との防水接続工法を示し、図１
は可撓管を地中箱の側壁に接続した状態の一部破断正面
図、図２は図１の右側面図、図３および図４は接続工程
説明用の要部拡大断面図である。本実施例においては、
可撓管として波付硬質ポリエチレン管を用い、地中箱で
あるハンドホールの側壁に防水状態で接続する場合につ
いて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show a waterproof connection construction method between a flexible tube and an underground box in one embodiment of the present invention.
Is a partially cutaway front view of the flexible tube connected to the side wall of the underground box, FIG. 2 is a right side view of FIG. 1, and FIGS. 3 and 4 are enlarged cross-sectional views of a main part for explaining the connecting step. In this embodiment,
A case where a corrugated hard polyethylene pipe is used as the flexible pipe and is connected to the side wall of the handhole which is the underground box in a waterproof state will be described.
【００１２】図１、図２に示すように、ハンドホール１
は四角形の底板２の四辺に側壁３が連設され、側壁３の
上部に肩部４が連設され、肩部４の上部に作業口部５が
連設され、作業口部５は鉄蓋６により開放可能に閉塞さ
れている。各側壁３の底板２側寄り位置の外面側には、
後述する可撓管を接続するための開口部を形成しやすい
ように凹入部７が形成されている。そして、コンクリー
トにより側壁３と作業口部５で上下複数のブロックに分
割されて形成されている。As shown in FIGS. 1 and 2, the handhole 1
The side walls 3 are connected to the four sides of the rectangular bottom plate 2, the shoulders 4 are connected to the upper portions of the side walls 3, and the working port 5 is connected to the upper part of the shoulders 4. 6 is openably closed. On the outer surface side of each side wall 3 near the bottom plate 2 side,
The recessed portion 7 is formed so that an opening for connecting a flexible tube described later can be easily formed. The side wall 3 and the working opening 5 are divided into a plurality of upper and lower blocks by concrete.
【００１３】ケーブルを新設する場合について説明する
と、図１ないし図３に示すように、あらかじめ工場にお
いて、所望の側壁３に凹入部７から切断装置により開口
部８を形成しておく。また、側壁３における開口部８の
周囲複数箇所に穴を形成し、各穴には先端側に割溝が形
成され、先端側の内径が小さくなるように形成されたア
ンカー（プラグ）９を打設しておく（このアンカー９は
作業現場で打設してもよく、またはハンドホール１の成
形時に埋設してもよい。）一方、あらかじめ、工場にお
いて、合成樹脂、例えば、ＦＲＰ（強化プラスッチク）
から成る取付板１０に波付硬質ポリエチレン管である外
周が螺旋状に成形された短い可撓管１１の一端をシール
状態で接続する。すなわち、取付板１０を形成する際、
可撓管１１の一端をＦＲＰによりインサート成形し、こ
のＦＲＰによる被覆部１２を可撓管１１の端部外周に固
着することにより、可撓管１１の一端を取付板１０にシ
ール状態に接続し、可撓管１１を取付板１０に対して開
口させる。取付板１０の外縁部複数箇所にはアンカー９
に対応する取付穴１３を形成する。このようにＦＲＰを
用いることにより、可撓管１１をインサートして成形す
る際の金型の構成の簡素化および低コスト化を図ること
ができる。The case of newly installing a cable will be described. As shown in FIGS. 1 to 3, an opening 8 is previously formed in a desired side wall 3 from a recess 7 by a cutting device in a factory. Further, holes are formed at a plurality of locations around the opening 8 in the side wall 3, and a split groove is formed on the tip side of each hole, and an anchor (plug) 9 formed so that the inner diameter on the tip side is reduced is driven. The anchor 9 may be installed at the work site or may be embedded at the time of molding the handhole 1. On the other hand, a synthetic resin such as FRP (reinforced plastic) is preliminarily set in the factory.
One end of a short flexible tube 11, which is a corrugated hard polyethylene tube whose outer periphery is formed in a spiral shape, is connected to the mounting plate 10 made of (1) in a sealed state. That is, when the mounting plate 10 is formed,
One end of the flexible tube 11 is insert-molded by FRP, and the covering portion 12 made of this FRP is fixed to the outer periphery of the end of the flexible tube 11, thereby connecting one end of the flexible tube 11 to the mounting plate 10 in a sealed state. , The flexible tube 11 is opened to the mounting plate 10. Anchors 9 are provided at a plurality of outer edges of the mounting plate 10.
And a mounting hole 13 corresponding to is formed. By using the FRP as described above, it is possible to simplify the structure of the mold and reduce the cost when the flexible tube 11 is inserted and molded.
【００１４】そして、まず、作業現場において、掘削し
た地中の底部に砕石等１４を敷き、その上にハンドホー
ル１をブロックごとに順次防水モルタル処理を施しなが
ら積み重ねることにより、ハンドホール１を構築する。
次に、ハンドホール１および取付板１０の取付面を清掃
する。次に、図１。図２、図４に示すように、シール材
１５を取付板１０の取付面の外縁部周囲に貼布し、シー
ル材１５をハンドホール１の開口部８の外周で側壁３と
の間に介在させ、取付板１０により開口部８を閉塞する
ようにする。次に、取付板１０の外面周囲に四辺がそれ
ぞれアングル状に形成されたステンレス製の補強枠１６
を重ね、補強枠１６の取付穴１７を取付板１０の取付穴
１３に一致させる。次に、ステンレス製のワッシャ１８
に挿通したステンレス製のボルト１９を補強枠１６と取
付板１０の取付穴１７と１３からアンカー９に強制的に
螺入して、アンカー９の先端側を穴の内壁に強固に押し
付け、これにより取付板１０を補強枠１６と共に側壁３
に取り付ける。次に、取付板１０の周囲と側壁３との間
にコーキング材２０を充填してシールする。First, at the work site, the crushed stones 14 are laid on the bottom of the excavated ground, and the handholes 1 are stacked on each block while sequentially applying waterproof mortar treatment to construct the handhole 1. To do.
Next, the mounting surfaces of the handhole 1 and the mounting plate 10 are cleaned. Next, FIG. As shown in FIGS. 2 and 4, the sealing material 15 is applied around the outer edge of the mounting surface of the mounting plate 10, and the sealing material 15 is interposed between the side wall 3 and the outer periphery of the opening 8 of the handhole 1. Then, the opening 8 is closed by the mounting plate 10. Next, a stainless steel reinforcing frame 16 having four angles formed around the outer surface of the mounting plate 10 is formed.
And the mounting holes 17 of the reinforcing frame 16 are aligned with the mounting holes 13 of the mounting plate 10. Next, stainless steel washer 18
The bolt 19 made of stainless steel inserted into the fork is forcibly screwed into the anchor 9 from the mounting holes 17 and 13 of the reinforcing frame 16 and the mounting plate 10, and the tip side of the anchor 9 is pressed firmly against the inner wall of the hole. The mounting plate 10 and the reinforcing frame 16 together with the side wall 3
Attach to. Next, the caulking material 20 is filled between the periphery of the mounting plate 10 and the side wall 3 and sealed.
【００１５】上記のようにして短い可撓管１１の一端を
ハンドホール１の側壁３の開口部８に連通状態に接続し
た後、図１、図２に示すように、可撓管１１の他端と、
埋設済みで上記可撓管１１と同様の可撓管２１の端部と
に跨るように、内側にねじを有するカップリング２２を
螺合状態に接続し、カップリング２２の両端からその内
側にシール材である接着剤を流し込んで硬化させること
により、両可撓管１１、２１をシール状態で接続し、埋
設可撓管２１とハンドホール１との接続作業を完了す
る。そして、ケーブル引き込み後、土を埋め戻すことに
より、ケーブル引き込み作業を完了する。After connecting one end of the short flexible tube 11 to the opening 8 of the side wall 3 of the handhole 1 in a communication state as described above, as shown in FIGS. The edge,
A coupling 22 having a screw inside is connected in a threaded state so as to straddle the end of a flexible tube 21 that is already embedded and is similar to the flexible tube 11, and seals from both ends of the coupling 22 to the inside thereof. By pouring and curing an adhesive as a material, the flexible tubes 11 and 21 are connected in a sealed state, and the connection work between the embedded flexible tube 21 and the handhole 1 is completed. After the cable is pulled in, the soil is backfilled to complete the cable pulling operation.
【００１６】ここで、ケーブルの引き込みの一例とし
て、直角方向の側壁３の開口部８に接続した可撓管２１
にケーブルを引き込む場合について図５に示す概略説明
図を参照しながら説明する。上記にようにハンドホール
１の側壁３の外面に取り付けた取付板１０に可撓管１
１、２１を連通させているので、直角方向の側壁３の開
口部８に接続した可撓管１１、２１にケーブルを引き込
む際には、各側壁３の外面が互いに交差する点、すなわ
ち、外面のコーナーＣを中心とする半径Ｒでケーブルを
湾曲させる。これにより、実質的には側壁３の内面が外
面に位置することになる。したがって、直角方向の可撓
管１１、２１の距離が近く、特に、太いケーブルを引き
込む場合であっても、ハンドホールの全体形状を大きく
することなく、ケーブルの曲率を大きくして容易に引き
込むことができる。Here, as an example of pulling in the cable, the flexible tube 21 connected to the opening 8 of the side wall 3 in the right angle direction.
The case where the cable is pulled in will be described with reference to the schematic explanatory view shown in FIG. The flexible tube 1 is attached to the mounting plate 10 mounted on the outer surface of the side wall 3 of the handhole 1 as described above.
Since 1 and 21 are communicated with each other, when the cable is drawn into the flexible tubes 11 and 21 connected to the opening 8 of the side wall 3 in the right angle direction, the outer surfaces of the respective side walls 3 intersect with each other, that is, the outer surface. The cable is bent at a radius R centered on the corner C of the. As a result, the inner surface of the side wall 3 is substantially located on the outer surface. Therefore, the flexible tubes 11 and 21 in the right-angled direction are close to each other, and even when a thick cable is drawn in, it is possible to easily draw in the cable by increasing the curvature thereof without increasing the overall shape of the handhole. You can
【００１７】なお、上記実施例では、ケーブルを新設す
る場合について説明したが、ケーブルを増設する場合に
は、作業現場でハンドホール１の側壁３に凹入部７から
開口部８を形成すればよい。また、上記実施例では、組
立形のハンドホール１を用いた場合について説明した
が、一体形成形のハンドホールを用いることもできる。
また、ハンドホール以外にもマンホール等に適用するこ
とができる。更に、可撓管２１は地中箱との接続作業と
併行して埋設してもよく、または地中箱との接続後、埋
設することもできる。このほか、本発明は、その基本的
技術思想を逸脱しない範囲で種々変更することができ
る。In the above embodiment, the case where a cable is newly installed has been described, but when a cable is added, the side wall 3 of the handhole 1 may be formed with the recess 7 to the opening 8 at the work site. . Further, in the above embodiment, the case where the assembled type handhole 1 is used has been described, but an integrally formed type handhole can also be used.
Further, it can be applied to manholes and the like in addition to handholes. Further, the flexible tube 21 may be embedded in parallel with the connecting work with the underground box, or may be embedded after connecting with the underground box. In addition, the present invention can be variously modified without departing from the basic technical idea thereof.
【００１８】[0018]
【発明の効果】以上説明したように本発明によれば、合
成樹脂製の取付板に短い可撓管の一端をシール状態で接
続し、取付板および補強枠を地中箱の側壁に締着手段を
用いてシール状態に取り付け、短い可撓管の他端と埋設
可撓管の一端をカップリングを用いてシール状態に接続
するので、埋設可撓管と地中箱の側壁とを確実なシール
状態で接続し、地中箱の内部への浸水を防止することが
できる。したがって、引き込まれたケーブルの水没を防
止して長寿命化を図ることができ、しかも、ケーブル増
設時の作業能率を向上させることができる。また、取付
板に短い可撓管の一端をシール状態で接続する作業は、
あらかじめ工場等で行うことができるので、作業現場に
おいて、取付板を補強枠と共に地中箱の側壁に締着手段
を用いてシール状態で取り付け、短い可撓管と埋設可撓
管とをカップリングを用いてシール状態に接続すること
により、埋設可撓管の地中箱に対する接続作業を完了
し、その接続作業を短時間で行うことができる。したが
って、早期に土を埋戻すことができて作業性を向上させ
ることができるだけでなく、早期に作業現場の安全を回
復することができる。更には地中箱の側壁外面に取り付
ける取付板に可撓管を連通させるので、直角方向の側壁
の開口部に接続した可撓管にケーブルを引き込む際に
は、各側壁の外面が互いに交差する点を中心とする半径
でケーブルを湾曲させ、実質的には側壁の内面が外面に
位置することになり、直角方向の可撓管の距離が近く、
特に、太いケーブルを引き込む場合であっても、地中箱
の全体形状を大きくすることなく、ケーブルの曲率を大
きくして容易に引き込むことができる。しかも、従来の
ように地中箱の開口部に対してモルタルを充填する必要
がないので、開口部を必要以上に大きく形成しなくて済
む。したっがて、地中箱の小型化を図ることができる。As described above, according to the present invention, one end of a short flexible tube is connected to a mounting plate made of synthetic resin in a sealed state, and the mounting plate and the reinforcing frame are fastened to the side wall of the underground box. Since the other end of the short flexible tube and the one end of the embedded flexible tube are connected in a sealed state by using a coupling, the embedded flexible tube and the side wall of the underground box can be securely connected. By connecting in a sealed state, it is possible to prevent water from entering the inside of the underground box. Therefore, it is possible to prevent the pulled-in cable from being submerged in water and to prolong the service life, and also to improve the work efficiency when the cable is added. Also, the work of connecting one end of a short flexible tube to the mounting plate in a sealed state is
Since it can be done in advance in a factory, etc., at the work site, the mounting plate is attached to the side wall of the underground box together with the reinforcing frame in a sealed state using the fastening means, and the short flexible tube and the embedded flexible tube are coupled. By connecting in a sealed state by using, the connection work of the buried flexible tube to the underground box can be completed, and the connection work can be performed in a short time. Therefore, not only can the soil be backfilled early to improve workability, but also the safety of the work site can be restored early. Furthermore, since the flexible tube is made to communicate with the mounting plate attached to the outer surface of the side wall of the underground box, when the cable is pulled into the flexible tube connected to the opening of the side wall in the right angle direction, the outer surfaces of the respective side walls intersect each other. The cable is curved with a radius centered on the point, the inner surface of the side wall is substantially located on the outer surface, and the distance of the flexible tube in the perpendicular direction is short,
In particular, even when a thick cable is drawn in, the cable can be easily drawn in by increasing the curvature of the cable without increasing the overall shape of the underground box. Moreover, since it is not necessary to fill the mortar into the opening of the underground box as in the conventional case, it is not necessary to make the opening larger than necessary. Therefore, it is possible to reduce the size of the underground box.
【図１】本発明の一実施例における可撓管と地中箱との
防水接続工法を示し、埋設可撓管を地中箱の側壁に接続
した状態の一部破断正面図FIG. 1 is a partially cutaway front view showing a waterproof connecting method between a flexible tube and an underground box according to an embodiment of the present invention, in which a buried flexible tube is connected to a side wall of the underground box.
【図２】同防水接続工法を示し、図１の右側面図FIG. 2 is a right side view of FIG. 1 showing the waterproof connection method.
【図３】同防水接続工法を示し、可撓管と地中箱の側壁
との接続工程説明用の要部拡大断面図FIG. 3 is an enlarged sectional view showing an essential part for explaining a connecting process between the flexible tube and the side wall of the underground box, showing the waterproof connecting method.
【図４】同防水接続工法を示し、可撓管と地中箱の側壁
との接続工程説明用の要部拡大断面図FIG. 4 is an enlarged sectional view showing an essential part for explaining the connecting process between the flexible tube and the side wall of the underground box, showing the waterproof connection method.
【図５】同防水接続工法によるケーブルの引き込み例を
従来の防水接続工法によるケーブルの引き込み例と比較
して示す概略説明図FIG. 5 is a schematic explanatory view showing an example of pulling in a cable by the waterproof connection construction method in comparison with an example of pulling in a cable by a conventional waterproof connection construction method.
１ ハンドホール ８ 開口部 ９ アンカー １０ 取付板 １１ 短い可撓管 １５ シール材 １６ 補強枠 １８ ワッシャ １９ ボルト ２０ コーキング材 ２１ 埋設済みの可撓管 ２２ カップリング 1 Hand Hole 8 Opening 9 Anchor 10 Mounting Plate 11 Short Flexible Tube 15 Sealing Material 16 Reinforcing Frame 18 Washer 19 Bolt 20 Caulking Material 21 Embedded Flexible Tube 22 Coupling
Claims (1)
をシール状態で接続し、地中箱の側壁に形成された開口
部を閉塞するように、上記側壁に上記取付板をその外面
周縁部に重ねた金属製の補強枠と共に締着手段を用いて
シール状態に取り付け、上記可撓管の他端と埋設可撓管
の一端をカップリングを用いてシール状態に接続するこ
とを特徴とする可撓管と地中箱との防水接続工法。1. A mounting plate made of synthetic resin is connected to one end of a short flexible tube in a sealed state, and the mounting plate is attached to the side wall so as to close an opening formed in the side wall of the underground box. Attaching in a sealed state using a fastening means together with a metallic reinforcing frame that is overlapped on the peripheral edge of the outer surface, and connecting the other end of the flexible tube and one end of the embedded flexible tube in a sealed state using a coupling. A waterproof connection method between the characteristic flexible tube and the underground box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4359828A JPH06193086A (en) | 1992-12-28 | 1992-12-28 | Waterproof connecting method for flexible tube and underground box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4359828A JPH06193086A (en) | 1992-12-28 | 1992-12-28 | Waterproof connecting method for flexible tube and underground box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06193086A true JPH06193086A (en) | 1994-07-12 |
Family
ID=18466508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4359828A Pending JPH06193086A (en) | 1992-12-28 | 1992-12-28 | Waterproof connecting method for flexible tube and underground box |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06193086A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04336127A (en) * | 1991-05-10 | 1992-11-24 | Sekisui Chem Co Ltd | Connecting method between propulsion pipe and manhole |
| JP4097426B2 (en) * | 2001-12-07 | 2008-06-11 | 日本ビクター株式会社 | Phase conversion surround circuit |
-
1992
- 1992-12-28 JP JP4359828A patent/JPH06193086A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04336127A (en) * | 1991-05-10 | 1992-11-24 | Sekisui Chem Co Ltd | Connecting method between propulsion pipe and manhole |
| JP4097426B2 (en) * | 2001-12-07 | 2008-06-11 | 日本ビクター株式会社 | Phase conversion surround circuit |
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