JP2974065B2 - Airtightness maintenance device in C / C / BOX pipeline - Google Patents
Airtightness maintenance device in C / C / BOX pipelineInfo
- Publication number
- JP2974065B2 JP2974065B2 JP9241019A JP24101997A JP2974065B2 JP 2974065 B2 JP2974065 B2 JP 2974065B2 JP 9241019 A JP9241019 A JP 9241019A JP 24101997 A JP24101997 A JP 24101997A JP 2974065 B2 JP2974065 B2 JP 2974065B2
- Authority
- JP
- Japan
- Prior art keywords
- box
- pipe
- annular gasket
- gasket
- section
- 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
Links
Landscapes
- Gasket Seals (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は電力，通信用ケー
ブル等を敷設する地中埋設の電線共同溝となるＣ・Ｃ・
ＢＯＸ管路部における気密性保持装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a C.C.
The present invention relates to a device for maintaining airtightness in a BOX pipe section.
【０００２】[0002]
【従来の技術】一般に、電力，通信用ケーブル等を敷設
する地下埋設となるプレキャストコンクリート製Ｃ・Ｃ
・ＢＯＸ（電線共同溝）の管路部にあって接続時のシー
ル構成（気密性保持装置）としては、複数の管路（多孔
管路）を配設するＣ・Ｃ・ＢＯＸ端面の外周部にシール
溝を設け、Ｃ・Ｃ・ＢＯＸ群の接続時に前記シール溝に
Ｏリング形の環状パッキン材を介在の圧接とし、Ｃ・Ｃ
・ＢＯＸの接合面に対し埋設使用等に起因する地下水と
か土砂の侵入を防ぐ構造である。従来のＣ・Ｃ・ＢＯＸ
におけるシールは、Ｃ・Ｃ・ＢＯＸ端面全域の外周部に
環状配設する面シール構成であり、埋設時に生ずる地下
水等の外部侵入を防ぐだけのものであり、管路部自体の
個々に特段な気密性を保たせるものではない。2. Description of the Related Art Generally, a precast concrete C / C to be buried underground for laying power and communication cables and the like.
-As a seal configuration (airtightness holding device) at the time of connection in a pipe section of a BOX (wire common groove), an outer peripheral portion of a C, C, BOX end face in which a plurality of pipes (porous pipes) are provided. A seal groove is formed in the seal groove, and when the C, C, and BOX groups are connected, an annular ring-shaped packing material of O-ring is interposed in the seal groove to press the seal groove.
・ It is a structure to prevent intrusion of groundwater or earth and sand caused by buried use etc. into the joint surface of the BOX. Conventional C / C / BOX
Is a surface seal configuration annularly disposed on the outer periphery of the entire C, C, and BOX end face, and is only for preventing external intrusion of groundwater and the like generated at the time of burial, and is particularly special for each of the pipe sections themselves. It does not keep airtightness.
【０００３】[0003]
【発明が解決しようとする課題】即ち、前記Ｃ・Ｃ・Ｂ
ＯＸ端面のシール箇所は、Ｃ・Ｃ・ＢＯＸ本体に配設さ
れた複数本のＰＥパイプ製管路（多孔管路）を包囲する
外周部分にあり、このシール部分と管路間の端面はアク
リル板とか鉄板等の如き気密性の高い部材で覆われるわ
けではなく、粗面となるコンクリート地肌が直接露出す
る構造となっている。このため、連通される管路部同士
は直接の気密性は保てない。従って、電力，通信用ケー
ブル等の使用の如く連通された管路部に気密性が要求さ
れても、管路端にはＣ・Ｃ・ＢＯＸ端面のコンクリート
地肌が臨むため、管路内の空気（気体）はコンクリート
地肌に有する粗面微小間隙を経て自然と外方へ漏洩され
るものとなり、管路部同士の接合部に確実な気密性を得
ることはできなかった。That is, the above-mentioned C, C, B
The seal portion of the OX end face is located at the outer peripheral portion surrounding a plurality of PE pipe pipelines (porous pipelines) provided in the CC box body, and the end face between the seal portion and the pipeline is made of acrylic. It is not covered with a highly airtight member such as a plate or an iron plate, but has a structure in which the roughened concrete ground surface is directly exposed. For this reason, the pipe sections communicated with each other cannot maintain direct airtightness. Therefore, even if airtightness is required for the connected pipes as in the case of use of electric power, communication cables, etc., the concrete ground on the C, C, and BOX end faces faces the pipe ends, and the air in the pipes is air-tight. (Gas) naturally leaks outward through the fine gaps in the rough surface of the concrete ground, and it was not possible to obtain reliable airtightness at the joint between the pipe sections.
【０００４】なお、対向する管路部の鍔部に環状のゴム
パッキン又はウレタンパッキンを装着する事も考えられ
るが、該ゴムパッキン又はウレタンパッキンの単独の使
用では、パッキン形状に関係なく気密性能を保つことは
出来ない（実験の結果、明らかである）。It is conceivable to attach an annular rubber packing or urethane packing to the flanges of the pipe sections facing each other. However, when the rubber packing or urethane packing is used alone, the airtightness is improved regardless of the packing shape. It cannot be kept (it is clear from the experiment).
【０００５】本発明は上記実情に鑑み、対向するＣ・Ｃ
・ＢＯＸ管路部の各鍔部に、部材を異にし且つ断面形状
を異にした２個の環状ガスケットを介在し複合体構成と
することで、上記課題を解決するＣ・Ｃ・ＢＯＸ管路部
における気密性保持装置を提供することを目的としたも
のである。The present invention has been made in view of the above circumstances, and has an
A C.C.BOX pipeline which solves the above-mentioned problem by forming a composite structure by interposing two annular gaskets having different members and different cross-sectional shapes in each flange portion of the BOX pipeline portion. It is an object of the present invention to provide an airtightness maintaining device in a section.
【０００６】[0006]
【課題を解決するための手段】本発明は、プレキャスト
コンクリート製Ｃ・Ｃ・ＢＯＸ管路部の接続機構におい
て、Ｃ・Ｃ・ＢＯＸ端面に臨む片方のＰＥパイプ製管路
端に設けた鍔部に、断面半円弧状環条部を形成すると共
に、この頂部に断面半円弧状小凸部と下端中央部に断面
半円弧状小凹部を設けてなる気密ゴム製環状ガスケット
を貼着し、他方のＰＥパイプ製管路端に設けた鍔部に、
薄平形の発泡ウレタン製環状ガスケットを貼着し、管路
部接続時の圧着力にて前記双方の環状ガスケットを、Ｃ
・Ｃ・ＢＯＸ端面の管路接合位置に構成される一定のシ
ール間隙部で圧接変位し積層ガスケットとなる複合体構
成とするものである。SUMMARY OF THE INVENTION The present invention relates to a connecting mechanism for a precast concrete C.C.BOX pipe section, wherein a flange provided at one end of a PE pipe pipe facing the end face of the C.C.BOX box. In addition, a gasket rubber annular gasket formed by forming a semicircular cross-sectional annular portion at the top, and providing a small semicircular cross-sectional convex portion at the top and a small semicircular cross-sectional concave portion at the center of the lower end, is attached to the other end. In the flange provided at the end of the pipeline made of PE pipe,
A thin flat urethane foam gasket is adhered to the gasket, and the two gaskets are attached to each other by pressing force at the time of pipe connection.
-A composite structure in which the gasket is displaced by pressure at a fixed seal gap formed at the pipe joint position on the end face of the C.BOX to form a laminated gasket.
【０００７】この場合、気密ゴム製環状ガスケットが、
鍔部の貼着用平坦部分の内外側に設けた位置決め兼ずれ
止め段部及びシール受け段部間に位置する。In this case, an airtight rubber annular gasket is
It is located between the positioning / displacement preventing step and the seal receiving step provided on the inner and outer sides of the flat portion where the flange is attached.
【０００８】また、発泡ウレタン製環状ガスケットが、
鍔部の貼着用平坦部分の内外側に設けた位置決め兼ずれ
止め段部及びシール受け段部間に位置するものである。[0008] Further, the annular gasket made of urethane foam is
It is located between the positioning / displacement preventing step and the seal receiving step provided on the inner and outer sides of the flat portion where the flange is attached.
【０００９】この様に、気密性保持装置は片方のＣ・Ｃ
・ＢＯＸ管路部の鍔部に貼着した断面半円弧状を呈する
気密ゴム製環状ガスケットと、他方のＣ・Ｃ・ＢＯＸ管
路部の鍔部に貼着の薄平形の発泡ウレタン製環状ガスケ
ットを、縦配列となるＣ・Ｃ・ＢＯＸ群のＰＣ鋼より線
等による緊張定着時に生ずる圧着力をもって圧接し、両
環状ガスケットが双方をＣ・Ｃ・ＢＯＸ端面のシール間
隙部内にあって変位し積層ガスケットとなる複合体構成
となりシール圧力を増し、連通となる管路部間の気密性
保持がなされる。このとき、気密ゴム製環状ガスケット
の形状を、断面半円弧状環条部の頂部に更に断面半円弧
小凸部を配す段構造とし局部的に圧力を上げるため、大
なる圧接力が生じ、対向の発泡ウレタン製環状ガスケッ
トの変形と相俟って積層ガスケットの複合体となり、空
気漏れのない確実な管路気密性の保持となる。As described above, the airtight holding device is provided with one C.C.
・ A hermetic rubber annular gasket with a semicircular cross section attached to the flange of the BOX pipeline, and a thin flat urethane foam annular gasket affixed to the flange of the other CC / BOX pipeline. Are pressed against each other with the pressing force generated at the time of tension fixation by the PC steel strands of the C, C, and BOX groups in the vertical arrangement, and both annular gaskets are displaced because both are in the seal gap at the C, C, and BOX end faces. The composite structure becomes a laminated gasket, the sealing pressure is increased, and the hermeticity between the communicating pipe sections is maintained. At this time, the shape of the hermetic rubber annular gasket has a stepped structure in which a small convex portion having a semicircular cross section is further arranged at the top of the annular portion having a semicircular cross section, so that the pressure is locally increased, so that a large pressing force is generated. Combined with the deformation of the opposed urethane foam annular gasket, it becomes a composite of a laminated gasket, and secure airtightness of the pipeline without air leakage is ensured.
【００１０】但し、断面半円弧状の気密ゴム製環状ガス
ケットの下端中央部には、頂部の断面半円弧状小凸部に
見合う面積をもつ断面半円弧状小凹部を配し所謂逃げ構
造を配設しているため、気密ゴム自体に塑性変形を招か
ない。However, a so-called relief structure is provided at the center of the lower end of the hermetic rubber annular gasket having a semi-circular cross section and having a semi-circular small cross-sectional recess having an area corresponding to the small convex semi-circular cross section at the top. Since it is provided, the hermetic rubber itself does not cause plastic deformation.
【００１１】また、気密ゴム製環状ガスケットと発泡ウ
レタン製環状ガスケットは、管路鍔部にあって位置決め
兼ずれ止め段部とシール受け段部で位置規制されるので
貼着が容易となり、且つ位置決め兼ずれ止め段部で外圧
が掛かったときのガスケット受けとなり、また内圧が掛
かったときはＣ・Ｃ・ＢＯＸ端面側のシール受け段部で
受けるため、ガスケットのセット位置ずれを来さない。The annular gasket made of airtight rubber and the annular gasket made of urethane foam are positioned at the flange portion of the conduit and are positioned by the positioning / shift preventing step portion and the seal receiving step portion, so that it is easy to attach and position. It serves as a gasket receiver when external pressure is applied at the step for preventing slippage, and when the internal pressure is applied, the gasket is received at the seal receiving step on the C, C, and BOX end face side, so that the set position of the gasket does not shift.
【００１２】[0012]
【発明の実施の形態】以下、本発明のＣ・Ｃ・ＢＯＸ管
路部における気密性保持装置を一実施例の図に基づいて
説明すれば、次の通りである。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an airtightness holding device in a CC box according to an embodiment of the present invention.
【００１３】図１乃至図６は多孔管（図示にあって、４
本）となるＣ・Ｃ・ＢＯＸの各管路部の気密性保持装置
の実施例を示す。１は所定長さのプレキャストコンクリ
ート製Ｃ・Ｃ・ＢＯＸであり、このＣ・Ｃ・ＢＯＸ１に
は長手方向に複数本のＰＥパイプ製管路２が所定間隔で
埋設されている。この場合、Ｃ・Ｃ・ＢＯＸ１の端面１
ａに臨む管路２に形成した鍔部３の貼着用平坦部分３ａ
は、前記端面１ａの線上よりシール受け段部４を介し一
定間隔ａを内方に隔てた位置に配する。５は管路２の鍔
部３の貼着用平坦部分３ａに接着材６をもって装着する
気密ゴム製環状ガスケットで、該気密ゴム製環状ガスケ
ット５の構成は、断面半円弧状環条部５ａを形成すると
共に、この頂部に断面半円弧状小凸部５ｂと該断面半円
弧状小凸部５ｂに対向する下端中央部に同等面積をもつ
断面半円弧状小凹部５ｃを設けた構造である。７は前記
Ｃ・Ｃ・ＢＯＸ１に接続する対向側のＣ・Ｃ・ＢＯＸ１
のＰＥパイプ製管路２の鍔部３に接着材６でもって貼着
する発泡ウレタン製環状ガスケットで、該発泡ウレタン
製環状ガスケット７の形状は薄平形であり、潰れた場合
に極小厚となる。また、前記気密ゴム製環状ガスケット
５と発泡ウレタン製環状ガスケット７の貼着としては、
各管路２の鍔部３の貼着用平坦部分３ａにあって、その
内周側に設けた小さな位置決め兼ずれ止め段部８と外周
側に位置する前記シール受け段部４間で行う。９は適宜
個数のＣ・Ｃ・ＢＯＸ１を縦配列し、その各縦貫通した
縦締シース孔１０に挿通する耐蝕性ＰＣ鋼より線で（図
２参照）、該ＰＣ鋼より線９の末端部を公知の定着装置
（図示せず）を用いて緊締しＣ・Ｃ・ＢＯＸ管路部１１
を構成する。図中、１２はＣ・Ｃ・ＢＯＸ１の端面１ａ
の外周縁部に配設したシール溝１３に装着する公知の環
状シール部材である。FIGS. 1 to 6 show a perforated tube (4 in FIG. 1).
1 shows an embodiment of the airtightness holding device of each pipe section of C, C, and BOX to be the present invention. Reference numeral 1 denotes a pre-cast concrete C.C.BOX having a predetermined length, and a plurality of PE pipe pipes 2 are buried in the C.C.BOX 1 at predetermined intervals in the longitudinal direction. In this case, the end face 1 of the CC box 1
a flat portion 3a for attachment of the flange portion 3 formed in the pipeline 2 facing the a
Is disposed at a position spaced inward from the line of the end face 1a by a constant distance a via the seal receiving step 4. Reference numeral 5 denotes an airtight rubber annular gasket which is attached to the flat portion 3a of the flange portion 3 of the conduit 2 with an adhesive material 6, and the configuration of the airtight rubber annular gasket 5 forms a semicircular annular ring portion 5a. At the same time, a small convex portion 5b having a semi-circular cross section and a small concave portion 5c having a similar area are provided at the center of the lower end opposite to the small convex portion 5b. Reference numeral 7 denotes the CC CC BOX 1 on the opposite side connected to the CC BOX 1
Is an annular gasket made of urethane foam, which is adhered to the flange portion 3 of the pipeline 2 made of PE pipe with an adhesive material 6. The shape of the annular gasket 7 made of urethane foam is a thin flat shape, and becomes extremely small when crushed. . Further, as the attachment of the airtight rubber annular gasket 5 and the foamed urethane annular gasket 7,
The step is performed between a small positioning / displacement preventing step 8 provided on the inner peripheral side of the flat portion 3a of the flange 3 of each pipeline 2 and the seal receiving step 4 located on the outer peripheral side. Reference numeral 9 denotes a corrosion-resistant PC steel stranded wire in which an appropriate number of C, C, and BOXs 1 are vertically arranged, and each of which is inserted into a vertically tightened sheath hole 10 (see FIG. 2). Is tightened using a known fixing device (not shown).
Is configured. In the drawing, reference numeral 12 denotes an end surface 1a of the CC box 1
Is a known annular seal member to be mounted in a seal groove 13 provided on the outer peripheral edge of the seal member.
【００１４】但し、前記気密ゴム製環状ガスケット５の
部材は、例えば硬度４０〜７０の範囲とし、また、発泡
ウレタン製環状ガスケット７の部材は発泡倍率を５％以
上に設定するのが最適である。However, it is most preferable that the members of the hermetic rubber annular gasket 5 have a hardness of, for example, 40 to 70, and that the members of the urethane foam annular gasket 7 have a foaming ratio of 5% or more. .
【００１５】いまこの作用を説明すると、先ずＣ・Ｃ・
ＢＯＸ１端の管路２の鍔部３に対する気密ゴム製環状ガ
スケット５の装着作業としては、この鍔部３の貼着用平
坦部分３ａに接着材６を塗布し、この状態で鍔部３の位
置決め兼ずれ止め段部８とＣ・Ｃ・ＢＯＸ側のシール受
け段部４間にあって気密ゴム製環状ガスケット５を、そ
の平坦底部５ｄ側より嵌め込むだけで簡単に所定箇所に
変形のない貼着セットがなされる。また、他のＣ・Ｃ・
ＢＯＸ１の管路２の対向鍔部３に対する発泡ウレタン製
環状ガスケット７の装着も、前記同様で貼着用平坦部分
３ａに接着材６を塗布してから嵌め込めばよい。Now, the operation will be described.
As a work of attaching the airtight rubber annular gasket 5 to the flange 3 of the conduit 2 at the end of the BOX 1, an adhesive 6 is applied to the flat portion 3a of the flange 3 to be attached, and in this state, the positioning of the flange 3 is performed. A sticking set that is easily deformed at a predetermined position can be easily obtained by simply inserting the hermetic rubber annular gasket 5 from the flat bottom portion 5d side between the slip preventing step portion 8 and the seal receiving step portion 4 on the CC / BOX side. Done. In addition, other CC
The mounting of the annular gasket 7 made of urethane foam to the opposed flange 3 of the conduit 2 of the BOX 1 may be performed by applying the adhesive 6 to the flat portion 3a to be attached in the same manner as described above.
【００１６】ここにおいて、Ｃ・Ｃ・ＢＯＸ管路部の接
続時の気密性保持装置の構成としては、縦配列とするＣ
・Ｃ・ＢＯＸ１の一端面に臨む管路２の気密ゴム製環状
ガスケット５に、次段のＣ・Ｃ・ＢＯＸ１の他端面に臨
む発泡ウレタン製環状ガスケット７を突き合わすように
セットする。この状態で、各Ｃ・Ｃ・ＢＯＸ１に貫通の
縦締シース孔１０にＰＣ鋼より線９を挿通し所定の定着
装置（図示せず）で緊張定着すれば、この定着力に起因
し気密ゴム製環状ガスケット５と発泡ウレタン製環状ガ
スケット７はそれぞれ圧接変位され、全体として積層ガ
スケットを呈す複合体１４が構成される。Here, the structure of the airtightness holding device at the time of connection of the C, C, and BOX pipelines is as follows.
The annular gasket 7 made of urethane foam facing the other end surface of the C.C.BOX 1 is set so as to abut the airtight rubber annular gasket 5 of the pipe 2 facing one end surface of the C.BOX 1. In this state, if a PC steel stranded wire 9 is inserted into the longitudinally tightened sheath hole 10 penetrating through each CC box and tension-fixed by a predetermined fixing device (not shown), the airtight rubber is caused by this fixing force. The annular gasket 5 made of urethane and the annular gasket 7 made of urethane foam are respectively pressed and displaced to form a composite 14 having a laminated gasket as a whole.
【００１７】即ち、気密ゴム製環状ガスケット５と発泡
ウレタン製環状ガスケット７の２種類の環状ガスケット
は、双方のＣ・Ｃ・ＢＯＸ１，１の端面１ａ，１ａに設
けた間隔ａ，ａで構成される一定のシール間隙部ｂ内に
あって適宜潰され一体の積層ガスケットとなる複合体１
４となり、連通となる管路部の気密性を保持する。That is, the two types of annular gaskets, ie, the hermetic rubber annular gasket 5 and the urethane foam annular gasket 7, are formed with the spaces a, a provided on the end faces 1a, 1a of both C, C, and BOX1, 1. A composite 1 which is appropriately collapsed into an integrated laminated gasket within a certain seal gap b,
4, which maintains the airtightness of the conduit part which is in communication.
【００１８】このとき、気密ゴム製環状ガスケット５は
断面半円弧状環条部５ａの頂部に更に断面半円弧状小凸
部５ｂが突設された形状のため、該小凸部５ｂが強く断
面半円弧状環条部本体内にめり込む状態となり、この作
動が逆に局部的に圧力を上げて気密性を高める。但し、
断面半円弧状環条部５ａの底部には断面半円弧状小凸部
５ｂと同等の断面積をもつ断面半円弧状小凹部５ｃを設
け一種の断面積を引く所謂逃げ構成を取っているため、
環状ガスケット５がゴム部材であっても塑性変形を招か
ない。また、発泡ウレタン製環状ガスケット７は薄平形
で殆ど厚さをもたない受座構成となる。At this time, since the hermetic rubber annular gasket 5 has a shape in which a small convex portion 5b having a semicircular cross section is further protruded from the top of a ring portion 5a having a semicircular cross section, the small convex portion 5b has a strong cross section. The semicircular arc-shaped ring body is sunk into the main body, and this operation conversely increases the pressure locally to increase the airtightness. However,
A small concave portion 5c having a cross-sectional area equivalent to that of the small convex portion 5b is provided at the bottom of the semi-circular annular ring portion 5a. ,
Even if the annular gasket 5 is a rubber member, no plastic deformation is caused. Further, the annular gasket 7 made of urethane foam has a seating structure which is thin and has almost no thickness.
【００１９】また、気密ゴム製環状ガスケット５と発泡
ウレタン製環状ガスケット７で構成される複合体１４
は、管路鍔部３にあって内周側の位置決め兼ずれ止め段
部８と外周側のシール段部４間で位置規制されているの
で、位置決め兼ずれ止め段部８ではシール部に外圧が掛
かったときの受けとなり、また内圧が掛かったときはシ
ール段部４で受けられ、この点からも複合体１４自体の
ずれ，変形は無い。A composite 14 comprising an airtight rubber annular gasket 5 and a foamed urethane annular gasket 7
Is located in the pipeline flange 3 and is restricted in position between the positioning / displacement preventing step 8 on the inner peripheral side and the sealing step 4 on the outer peripheral side. , And when the internal pressure is applied, it is received by the seal step 4. From this point, there is no displacement or deformation of the composite 14 itself.
【００２０】なお、この位置決め兼ずれ止め段部８の高
さｃは、Ｃ・Ｃ・ＢＯＸ１の端面１ａ側に形成されるシ
ール段部４の間隔ａより小さく設定されているため、双
方のＣ・Ｃ・ＢＯＸ１の端面１ａの当接にあって位置決
め兼ずれ止め段部８，８の接衝を来さない。Since the height c of the positioning / shift preventing step 8 is set to be smaller than the distance a between the seal steps 4 formed on the end face 1a side of the C / C / BOX 1, both C are set. The positioning and slippage preventing step portions 8 and 8 do not come into contact with each other when the end surface 1a of the C.BOX 1 is in contact with the end surface 1a.
【００２１】このとき、定着装置の圧着力は、多孔管の
断面積に対しＰＣ鋼より線９の緊張定着をＰ＝１０．０
kgf/cm2 以上の力が作用するように管理する。At this time, the pressing force of the fixing device is such that the tension fixing of the PC stranded wire 9 with respect to the cross-sectional area of the perforated pipe is P = 10.0.
Manage so that the force of kgf / cm 2 or more acts.
【００２２】また、この気密ゴム製環状ガスケット５と
発泡ウレタン製環状ガスケット７の相互の働きにより、
正圧Ｐ＝３．０kgf/cm2 （空気圧）を２０分間保持、又
は負圧Ｐ＝−０．８kgf/cm2 （空気圧）を２０分間保持
した場合に、空気の漏洩のない構造とするものである。The mutual action of the hermetic rubber annular gasket 5 and the urethane foam annular gasket 7 allows
A structure without air leakage when positive pressure P = 3.0 kgf / cm 2 (air pressure) is maintained for 20 minutes or negative pressure P = −0.8 kgf / cm 2 (air pressure) is maintained for 20 minutes It is.
【００２３】[0023]
【発明の効果】上述の様に、本発明のＣ・Ｃ・ＢＯＸ管
路部における気密性保持装置はＰＥパイプ製管路端の鍔
部に、断面半円弧状環条部を形成し更にこの頂部に断面
半円弧状小凸部と下端中央部に断面半円弧状小凹部を設
けた気密ゴム製環状ガスケットを貼着し、対向の管路端
の鍔部には薄平形の発泡ウレタン製環状ガスケットを貼
着する構成を採るため、管路接続時の圧着力にて前記双
方の環状ガスケットが、Ｃ・Ｃ・ＢＯＸ端面に構成され
る一定のシール間隙部内で圧接され積層ガスケットを呈
す一体の複合体となり気密性が保たれ、且つこの時気密
ゴム製環状ガスケットに設けた断面半円弧状小凸部に起
因して更に大なる圧接力が生じより確実な気密性保持構
成となる。但し、環状ガスケットが気密ゴム製であって
も断面半円弧状小凸部に見合う断面半円弧状小凹部を底
部に設けているため、長期使用にあって塑性変形を招か
ない。As described above, the airtightness holding device in the C / C / BOX pipe section of the present invention forms a semi-circular annular section section at the flange at the end of the pipe made of PE pipe. An airtight rubber annular gasket with a semi-circular small convex part at the top and a semi-circular small concave part at the center of the lower end is adhered, and a thin flat urethane foam annular part at the flange at the end of the opposing pipe. In order to adopt a configuration in which a gasket is adhered, the two annular gaskets are pressed against each other in a fixed seal gap formed on the end surface of the C.C. The airtightness is maintained as a composite, and at this time, a larger pressing force is generated due to the small convex portion having a semicircular cross section provided on the airtight rubber annular gasket, so that a more reliable airtightness maintaining structure is obtained. However, even if the annular gasket is made of airtight rubber, since a small concave portion having a semicircular cross section corresponding to the small convex portion having a semicircular cross section is provided at the bottom, no plastic deformation is caused in long-term use.
【００２４】また、気密ゴム製環状ガスケットと発泡ウ
レタン製環状ガスケットは接着材をもってＰＥパイプ製
管路端の鍔部に貼着する構成のため、該環状ガスケット
はＣ・Ｃ・ＢＯＸの現場組み立て時に嵌着すればよく、
特別な技術を必要としない。しかも、粘着系のパッキン
材を使用していないため、施工時の脱着作業が容易とな
る。Further, since the annular gasket made of airtight rubber and the annular gasket made of urethane foam are adhered to the flange at the end of the pipe made of PE pipe with an adhesive material, the annular gasket is used when assembling the C / C / BOX on site. Just fit it,
No special skills are required. In addition, since no adhesive-based packing material is used, the attachment / detachment work during construction is facilitated.
【００２５】しかも、気密ゴム製環状ガスケットと発泡
ウレタン製環状ガスケットは鍔面にあって内外を位置決
め兼ずれ止め段部とシール受け段部で規制されるため、
管路に対し内，外圧が掛かってもシール（複合体）全体
にずれ等を招かないなどの効果を奏する。Moreover, the annular gasket made of airtight rubber and the annular gasket made of urethane foam are located on the flange surface, and the inside and outside are regulated by the positioning / shift preventing step and the seal receiving step.
Even if an internal or external pressure is applied to the pipeline, the seal (composite) as a whole will not be displaced.
【図１】本発明のＣ・Ｃ・ＢＯＸ管路部における気密性
保持装置の一実施例を示す説明図である。FIG. 1 is an explanatory view showing an embodiment of an airtightness holding device in a CC box section of the present invention.
【図２】接続すべき両Ｃ・Ｃ・ＢＯＸ端面の要部を示す
斜視図である。FIG. 2 is a perspective view showing a main part of both C, C, and BOX end faces to be connected.
【図３】接続したＣ・Ｃ・ＢＯＸ管路部の気密性保持状
態を示す拡大断面図である。FIG. 3 is an enlarged cross-sectional view showing a state in which the connected C, C, and BOX pipelines are kept airtight.
【図４】気密ゴム製環状ガスケットを示し、（Ａ）は正
面図であり、（Ｂ）は要部の拡大縦断面図である。4A and 4B show an airtight rubber annular gasket, FIG. 4A is a front view, and FIG. 4B is an enlarged longitudinal sectional view of a main part.
【図５】発泡ウレタン製環状ガスケットを示し、（Ａ）
は正面図であり、（Ｂ）は要部の拡大縦断面図である。FIG. 5 shows an annular gasket made of urethane foam, and (A)
Is a front view, and (B) is an enlarged vertical sectional view of a main part.
【図６】対向するＰＥパイプ製管路端の鍔部部分を示す
拡大説明図である。FIG. 6 is an enlarged explanatory view showing a flange portion at an end of a pipe made of PE pipe facing the pipe.
１ Ｃ・Ｃ・ＢＯＸ ２ ＰＥパイプ製管路 ３ 鍔部 ４ シール受け段部 ５ 気密ゴム製環状ガスケット ６ 接着材 ７ 発泡ウレタン製環状ガスケット ８ 位置決め兼ずれ止め段部 １３ 積層ガスケットとなる複合体 DESCRIPTION OF SYMBOLS 1 C ・ C ・ BOX 2 PE pipe pipe 3 Flange 4 Seal receiving step 5 Airtight rubber annular gasket 6 Adhesive material 7 Foam urethane annular gasket 8 Positioning and non-shifting step 13 Composite body to be a laminated gasket
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小林 恵一 東京都新宿区歌舞伎町２丁目２番15号 住建コンクリート工業株式会社内 (72)発明者 近藤 二郎 東京都新宿区歌舞伎町２丁目２番15号 住建コンクリート工業株式会社内 (72)発明者 杉山 基也 東京都新宿区歌舞伎町２丁目２番15号 住建コンクリート工業株式会社内 (72)発明者 遠藤 泰男 東京都目黒区鷹番１丁目10番６号 株式 会社ハッコー内 (56)参考文献 特開 平３−41290（ＪＰ，Ａ) 特開 平９−130950（ＪＰ，Ａ) 実開 昭63−97338（ＪＰ，Ｕ) 実開 昭63−83933（ＪＰ，Ｕ) 実開 平２−83626（ＪＰ，Ｕ) 実開 平３−21932（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) H02G 9/06 F16J 15/10 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Keiichi Kobayashi 2-2-1-15 Kabukicho, Shinjuku-ku, Tokyo Inside Sumiken Concrete Industry Co., Ltd. (72) Inventor Jiro Kondo 2-2-2 Kabukicho, Shinjuku-ku, Tokyo No. 15 Inside Sumiken Concrete Industry Co., Ltd. (72) Inventor Motoya Sugiyama 2-2-1 Kabukicho, Shinjuku-ku, Tokyo Inside Sumiken Concrete Industry Co., Ltd. (72) Inventor Yasuo Endo 1-chome Takaban, Meguro-ku, Tokyo No. 10-6 Inside Hako Co., Ltd. (56) References JP-A-3-41290 (JP, A) JP-A-9-130950 (JP, A) JP-A 63-97338 (JP, U) JP-A 63-97338 -83933 (JP, U) JP-A-2-83626 (JP, U) JP-A-3-21932 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) H02G 9/06 F16J 15/10
Claims (3)
ＯＸ管路部の接続機構において、Ｃ・Ｃ・ＢＯＸ端面に
臨む片方のＰＥパイプ製管路端に設けた鍔部に、断面半
円弧状環条部を形成すると共に、この頂部に断面半円弧
状小凸部と下端中央部に断面半円弧状小凹部を設けてな
る気密ゴム製環状ガスケットを貼着し、他方のＰＥパイ
プ製管路端に設けた鍔部に、薄平形の発泡ウレタン製環
状ガスケットを貼着し、管路部接続時の圧着力にて前記
双方の環状ガスケットを、Ｃ・Ｃ・ＢＯＸ端面の管路接
合位置に構成される一定のシール間隙部で圧接変位し積
層ガスケットとなる複合体構成とすることを特徴とする
Ｃ・Ｃ・ＢＯＸ管路部における気密性保持装置。1. C / C / B made of precast concrete
In the connection mechanism of the OX pipe section, a semi-circular section having a semicircular cross section is formed on a flange provided at one end of the pipe made of PE pipe facing the end face of the CC box, and a semicircular section is formed at the top. An airtight rubber annular gasket having a small arc-shaped convex part and a small semicircular concave part in the center of the lower end is stuck, and a thin flat urethane foam is attached to the flange provided at the other PE pipe end. An annular gasket is adhered, and the two annular gaskets are pressed and displaced at a fixed seal gap formed at a pipe joint position on the end surface of the C, C, and BOX by a crimping force at the time of connecting the pipe section, and the laminated gasket is pressed. An airtightness holding device in a C / C / BOX pipe section, wherein the airtightness holding device has a composite structure as follows.
着用平坦部分の内外側に設けた位置決め兼ずれ止め段部
及びシール受け段部間に位置する請求項１記載のＣ・Ｃ
・ＢＯＸ管路部における気密性保持装置。2. The C / C according to claim 1, wherein the hermetic rubber annular gasket is located between the positioning / displacement preventing step and the seal receiving step provided on the inside and outside of the flat portion to which the flange is attached.
-An airtight holding device in a BOX pipe section.
の貼着用平坦部分の内外側に設けた位置決め兼ずれ止め
段部及びシール受け段部間に位置する請求項１記載のＣ
・Ｃ・ＢＯＸ管路部における気密性保持装置。3. The gasket according to claim 1, wherein the urethane foam annular gasket is located between the positioning / shift preventing step and the seal receiving step provided on the inside and outside of the flat portion to which the flange is attached.
-An airtightness maintaining device in the C.BOX pipe section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9241019A JP2974065B2 (en) | 1997-09-05 | 1997-09-05 | Airtightness maintenance device in C / C / BOX pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9241019A JP2974065B2 (en) | 1997-09-05 | 1997-09-05 | Airtightness maintenance device in C / C / BOX pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1189066A JPH1189066A (en) | 1999-03-30 |
| JP2974065B2 true JP2974065B2 (en) | 1999-11-08 |
Family
ID=17068135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9241019A Expired - Fee Related JP2974065B2 (en) | 1997-09-05 | 1997-09-05 | Airtightness maintenance device in C / C / BOX pipeline |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2974065B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5760411B2 (en) * | 2010-12-08 | 2015-08-12 | Nok株式会社 | gasket |
-
1997
- 1997-09-05 JP JP9241019A patent/JP2974065B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1189066A (en) | 1999-03-30 |
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