JP5455077B2

JP5455077B2 - Water stop mechanism

Info

Publication number: JP5455077B2
Application number: JP2011240883A
Authority: JP
Inventors: 淳平濱本; 光徳菖蒲; 英次松浦
Original assignee: Kurimoto Ltd
Current assignee: Kurimoto Ltd
Priority date: 2011-11-02
Filing date: 2011-11-02
Publication date: 2014-03-26
Anticipated expiration: 2031-11-02
Also published as: JP2013096160A

Description

この発明は、水道管等の管体の内部を調査する調査器具を、水密状態を確保しつつ前記管体内に送り込むための止水機構に関する。 The present invention relates to a water stop mechanism for sending an investigation instrument for examining the inside of a pipe body such as a water pipe into the pipe body while ensuring a watertight state.

水道管等の管体の内部を調査する調査器具は、管体に挿し込まれた筒体の中に通されて、この筒体の一端側から調査対象箇所まで送り込まれる。そして、この調査器具のケーブルは、筒体の他端側から引き出されて観察装置に接続される。 A survey instrument for surveying the inside of a pipe body such as a water pipe is passed through a cylinder inserted into the pipe body and sent from one end side of the cylinder to a survey target location. And the cable of this investigation instrument is pulled out from the other end side of a cylinder, and is connected to an observation apparatus.

この調査に際しては、水道等の利用者の不便とならないように、管体に水等の流体を流通させた状態のまま行うことが多い。このため、管体への筒体の挿し込み部、及び、筒体からのケーブルの引き出し部において水漏れが生じやすい。この水漏れを防止するため、前記挿し込み部あるいは引き出し部に止水機構を設けて、この水漏れを防止するのが一般的である。この止水機構として、管体の受け口内面に周溝を形成し、この周溝にシール部材（Ｏリング等）を嵌め込み、この受け口に筒体を挿し込むようにした構成が採用できる。 In order to avoid inconvenience for users such as water supply, this investigation is often performed while a fluid such as water is circulated through the pipe body. For this reason, water leakage tends to occur at the insertion portion of the cylinder into the tube body and the cable drawing portion from the cylinder body. In order to prevent this water leakage, it is common to provide a water stop mechanism in the insertion part or the drawer part to prevent this water leakage. As this water stop mechanism, a configuration in which a circumferential groove is formed on the inner surface of the receiving port of the tube body, a seal member (O-ring or the like) is fitted into the circumferential groove, and a cylindrical body is inserted into the receiving port can be adopted.

この構成においては、管体と筒体との間の水密性を確保するために、筒体の外径よりも若干小さい内径のシール部材を用いることが多い。この場合、このシール部材が筒体の挿し込みの抵抗となって、その挿し込み作業がスムーズにできない場合がある。筒体とケーブルとの間の止水機構についても同様のことが言える。 In this configuration, a sealing member having an inner diameter slightly smaller than the outer diameter of the cylinder is often used in order to ensure watertightness between the tube and the cylinder. In this case, the sealing member may become a resistance for insertion of the cylindrical body, and the insertion work may not be smoothly performed. The same can be said for the water stop mechanism between the cylinder and the cable.

そこで、特許文献１に示す構成においては、周方向の一部に切れ込みを形成したシール部材を採用している。このシール部材は、管体への筒体の挿し込みがほぼ完了した段階で、その切れ込みを開くことによって筒体に直接設けられる。このようにすれば、シール部材が挿し込みの抵抗となりにくく、スムーズにその挿し込み作業を行うことができる。 Therefore, in the configuration shown in Patent Document 1, a seal member in which a cut is formed in a part in the circumferential direction is employed. This seal member is provided directly on the cylinder by opening the cut when the insertion of the cylinder into the pipe is almost completed. If it does in this way, a sealing member will become difficult to become resistance of insertion, and the insertion operation can be performed smoothly.

特開２００９−２２２８１３号公報JP 2009-2222813 A

特許文献１の構成においては、シール部材に切れ込みを形成しているため、この切れ込みを通って漏水する恐れがあり、水密性の確保の点で問題がある。 In the configuration of Patent Document 1, since a cut is formed in the seal member, there is a risk of water leaking through the cut, and there is a problem in securing water tightness.

そこで、この発明は、シール部材等による水密性を確保しつつ、筒体等の挿し込み作業をスムーズになし得るようにすることを課題とする。 Therefore, an object of the present invention is to enable smooth insertion of a cylinder or the like while ensuring water tightness by a seal member or the like.

上記の課題を解決するため、この発明は、管体の内部を調査する調査器具を、水密状態を確保しつつ前記管体内に送り込むための止水機構において、前記管体と前記調査器具を管体内に送り込む筒体との間の水密を確保する筒体止水部を備え、この筒体止水部が、筒体止水部本体と、筒体シール部材と、筒体シール押さえ部材とを有し、前記筒体シール部材が切れ目のない環状をしており、前記筒体止水部本体に設けた前記筒体シール部材に前記筒体を挿し込んで前記管体に通水し、その通水に伴う水圧によって前記筒体シール部材を前記筒体シール押さえ部材に押さえ付け、その押圧力によって前記筒体シール部材を扁平状に変形して、この筒体シール部材によって、前記筒体止水部からの漏水を防止するように止水機構を構成した。 In order to solve the above-described problems, the present invention provides a water stop mechanism for feeding a survey instrument for investigating the inside of a pipe body into the pipe body while ensuring a watertight state. A cylindrical water stop portion that secures water tightness between the cylindrical body to be fed into the body, and this cylindrical water stop portion includes a cylindrical water stop portion main body, a cylindrical seal member, and a cylindrical seal pressing member. The cylindrical seal member has a continuous ring shape, and the cylindrical body is inserted into the cylindrical seal member provided in the cylindrical water stop main body to pass water through the tubular body; The cylindrical seal member is pressed against the cylindrical seal pressing member by water pressure accompanying water flow, the cylindrical sealing member is deformed into a flat shape by the pressing force, and the cylindrical sealing member is fixed by the cylindrical sealing member. A water stop mechanism was configured to prevent water leakage from the water section.

この構成においては、筒体の外径とほぼ同じ内径の筒体シール部材を用いる。この筒体シール部材は、筒体止水部本体と筒体の両方に当接した状態となっている。管体への通水前においては、筒体シール部材は元の形状（例えば、断面円形のドーナツ形状）をしており、筒体止水部本体及び筒体への筒体シール部材の密接力は比較的小さい。このため、筒体シール部材にスムーズに筒体を挿し込むことができる。その一方で、通水を開始すると、その水圧によって前記筒体シール部材が筒体シール押さえ部材に押さえ付けられ、その押圧力でこの筒体シール部材の断面が扁平に変形する。すると、筒体シール部材と、筒体止水部本体及び筒体との間の密接力が高まる。しかも、この筒体シール部材の変形は通水開始後直ちに生じるため、水密性に対する信頼性が高い。また、筒体シール部材として、切れ目のない環状のものを採用したので、この切れ目から漏水する恐れがない。 In this configuration, a cylindrical seal member having an inner diameter substantially the same as the outer diameter of the cylindrical body is used. This cylindrical seal member is in a state of being in contact with both the cylindrical water stop main body and the cylindrical body. Before the water flow to the tube body, the cylindrical seal member has an original shape (for example, a donut shape with a circular cross section), and the tightness of the cylindrical seal member to the cylindrical water-stop body and the cylindrical body Is relatively small. For this reason, a cylinder can be smoothly inserted in a cylinder seal member. On the other hand, when the water flow is started, the cylindrical seal member is pressed against the cylindrical seal pressing member by the water pressure, and the cross section of the cylindrical seal member is deformed flat by the pressing force. Then, the close_contact | adherence force between a cylinder sealing member, a cylinder water-stop part main body, and a cylinder increases. Moreover, since the deformation of the cylindrical seal member occurs immediately after the start of water flow, the reliability with respect to water tightness is high. In addition, since an annular member having no cut is adopted as the cylindrical seal member, there is no possibility of water leakage from the cut.

前記構成においては、前記筒体止水部本体と、前記筒体止水部に接続する本管側のフランジとの間に、前記筒体の直径と略同径の貫通孔を形成したフランジパッキンを介在させるのが好ましい。 In the above configuration, a flange packing in which a through-hole having a diameter substantially the same as the diameter of the cylindrical body is formed between the cylindrical water-stop portion main body and a main-tube-side flange connected to the cylindrical water-stop portion. It is preferable to intervene.

前記筒体シール部材は、主として筒体止水部の上部からの漏水を防止する一方で、このフランジパッキンは、主として筒体止水部の下部からの漏水を防止する。このように、筒体シール部材とフランジパッキンを併用することによって、筒体止水部における水密性を一層向上することができる。この筒体止水部は、本管側に設けられた排水フランジや消火栓の取り付け用フランジ等の、種々のフランジに接続可能である。 The tubular seal member mainly prevents water leakage from the upper portion of the tubular water stop portion, while the flange packing mainly prevents water leakage from the lower portion of the tubular water stop portion. Thus, the watertightness in a cylinder water stop part can be improved further by using a cylinder seal member and flange packing together. This cylindrical water stop part can be connected to various flanges such as a drainage flange provided on the main pipe side and a flange for installing a fire hydrant.

前記各構成においては、前記調査器具のケーブルと前記筒体との間の水密を確保するケーブル止水部を備え、このケーブル止水部が、ケーブル止水部本体と、ケーブル止水部の受け部との間に、前記ケーブルの直径と略同径の貫通孔を形成したケーブルパッキンを介在させたものであって、このケーブルパッキンにケーブル軸方向の押圧力を付与し、その押圧力によって、前記貫通孔の内面と前記ケーブルの外周面とを密接させて、前記ケーブル止水部からの漏水を防止するようにし、前記押圧力が、このケーブルパッキンの径方向の幅中心よりも内径側で最大となる構成とすることができる。 In each of the above-described configurations, a cable water-stopping portion that ensures water-tightness between the cable of the survey instrument and the cylinder is provided, and the cable water-stopping portion includes a cable water-stopping portion main body and a cable water-stopping portion receiving portion. The cable packing in which a through hole having substantially the same diameter as the cable is formed is interposed between the cable portion, the pressing force in the cable axial direction is applied to the cable packing, and by the pressing force, The inner surface of the through hole and the outer peripheral surface of the cable are brought into close contact with each other so as to prevent water leakage from the cable water stop, and the pressing force is closer to the inner diameter side than the width center in the radial direction of the cable packing. The maximum configuration can be obtained.

この調査器具は、ケーブルの抜き挿しによって調査対象箇所まで案内されるが、ケーブル止水部における水密性の確保が重要である。ケーブルパッキンにケーブル軸方向の押圧力を付与すると、このケーブルパッキンが扁平に変形してケーブルとの間の密接力が高まる。これらの両密接力の作用によって、高い水密性を確保することができる。その一方で、ケーブルパッキンへの押圧力を解除すると、ケーブルパッキンと、ケーブルとの間の密接力が小さくなって、ケーブルを容易に抜き挿しすることができる。 Although this investigation instrument is guided to the investigation object location by inserting and removing the cable, it is important to ensure water tightness in the cable water stop. When a pressing force in the cable axial direction is applied to the cable packing, the cable packing is deformed into a flat shape and a close contact force with the cable is increased. High water tightness can be ensured by the action of these two close forces. On the other hand, when the pressing force to the cable packing is released, the close force between the cable packing and the cable is reduced, and the cable can be easily inserted and removed.

また、内径側で強く押圧することにより、ケーブルパッキンの変形量がこの内径側で特に大きくなり、このケーブルパッキンの貫通孔の内径面と、ケーブルの外周面との密接度合いが一層高まる。このため、ケーブル止水部における止水作用がさらに向上する。この内径側の押圧力を高める手法として、ケーブルパッキンに直接当接するケーブル止水部本体や、ケーブルパッキンを保持する受け部に、このケーブルパッキン側に凸状の段差を有する段部を形成したり、ケーブル止水部本体とケーブルパッキンとの間にシール部材を挟み込んだりすることが考えられる。 Further, by strongly pressing on the inner diameter side, the deformation amount of the cable packing becomes particularly large on the inner diameter side, and the close contact degree between the inner diameter surface of the through hole of the cable packing and the outer peripheral surface of the cable is further increased. For this reason, the water stop effect | action in a cable water stop part further improves. As a method of increasing the inner diameter side pressing force, a stepped portion having a convex step on the cable packing side may be formed on the cable water stop main body that directly contacts the cable packing or a receiving portion that holds the cable packing. It is conceivable that a seal member is sandwiched between the cable water stop body and the cable packing.

前記各構成とする代わりに、管体の内部を調査する調査器具を、水密状態を確保しつつ前記管体内に送り込むための止水機構において、前記調査器具のケーブルと前記筒体との間の水密を確保するケーブル止水部を備え、このケーブル止水部が、ケーブル止水部本体と、ケーブル止水部の受け部との間に、前記ケーブルの直径と略同径の貫通孔を形成したケーブルパッキンを介在させたものであって、このケーブルパッキンにケーブル軸方向の押圧力を付与し、その押圧力によって、前記貫通孔の内面と前記ケーブルの外周面とを密接させて、前記ケーブル止水部からの漏水を防止するようにし、前記押圧力が、このケーブルパッキンの径方向の幅中心よりも内径側で最大となるように止水機構を構成することもできる。 Instead of the above-described configurations, in the water stop mechanism for feeding the investigation instrument for examining the inside of the pipe body into the pipe body while ensuring a watertight state, between the cable of the investigation instrument and the cylindrical body A cable water stop to ensure water tightness, and this cable water stop forms a through-hole of approximately the same diameter as the cable between the cable water stop main body and the cable water stop receiver. The cable packing is provided with a pressing force in the axial direction of the cable, and the pressing force causes the inner surface of the through hole and the outer peripheral surface of the cable to be in close contact with each other. It is also possible to configure the water stop mechanism so that water leakage from the water stop portion is prevented and the pressing force is maximized on the inner diameter side of the radial center of the cable packing.

本構成のようにケーブルパッキンにケーブル軸方向の押圧力を付与すると、上述したように、ケーブルパッキンの貫通孔の内径面とケーブルの外周面との間が密接し水密性が大幅に向上する。その一方で、前記押圧力を解除すると、前記密接も解除されて、ケーブルの抜き挿しを容易に行うことができる。 When a pressing force in the cable axial direction is applied to the cable packing as in this configuration, as described above, the inner surface of the through hole of the cable packing and the outer peripheral surface of the cable are in close contact with each other, and the water tightness is greatly improved. On the other hand, when the pressing force is released, the close contact is also released and the cable can be easily inserted and removed.

さらに、このように内径側で強く押圧することにより、ケーブルパッキンの変形量がこの内径側で特に大きくなり、このケーブルパッキンの貫通孔の内径面と、ケーブルの外周面との密接度合いが一層高まる。このため、ケーブル止水部における止水作用がさらに向上する。この内径側の押圧力を高める手法として、ケーブルパッキンに直接当接するケーブル止水部本体や、ケーブルパッキンを保持する受け部に、このケーブルパッキン側に凸状の段差を有する段部を形成したり、ケーブル止水部本体とケーブルパッキンとの間にシール部材を挟み込んだりすることが考えられる。 Further, by pressing strongly on the inner diameter side in this way, the deformation amount of the cable packing becomes particularly large on the inner diameter side, and the close contact degree between the inner diameter surface of the through hole of the cable packing and the outer peripheral surface of the cable is further increased. . For this reason, the water stop effect | action in a cable water stop part further improves. As a method of increasing the inner diameter side pressing force, a stepped portion having a convex step on the cable packing side may be formed on the cable water stop main body that directly contacts the cable packing or a receiving portion that holds the cable packing. It is conceivable that a seal member is sandwiched between the cable water stop body and the cable packing.

この発明は、調査対象の管体と調査器具を送り込む筒体との間、又は、前記管体と調査器具のケーブルとの間の水密を確保すべく、筒体止水部本体に筒体シール部材を、又は、ケーブル止水部本体にケーブルパッキンを設け、筒体又はケーブルをこの筒体シール部材又はケーブルパッキンに挿し込んだ上で、この筒体シール部材又はケーブルパッキンを変形して筒体又はケーブルの外周面に密接させ、筒体止水部又はケーブル止水部からの漏水を防止するようにした。このようにすれば、筒体又はケーブルを両止水部にスムーズに抜き挿しすることができるとともに、高い水密性を確保することができる。 The present invention provides a cylindrical seal for a cylindrical water-stopping portion main body in order to ensure watertightness between a tube to be surveyed and a cylinder into which a survey instrument is fed, or between the tube and a cable of the survey instrument. A cable packing is provided on the member or the cable waterproofing body, and the cylinder or cable is inserted into the cylinder sealing member or cable packing, and then the cylinder sealing member or cable packing is deformed to form a cylinder. Or it was made to contact | adhere to the outer peripheral surface of a cable, and it was made to prevent the water leak from a cylinder water stop part or a cable water stop part. If it does in this way, while being able to insert / extract a cylinder or a cable smoothly to both water stop parts, high watertightness is securable.

本願発明に係る止水機構（筒体止水部）を示す縦断面図The longitudinal cross-sectional view which shows the water stop mechanism (tubular water stop part) which concerns on this invention 筒体止水部の止水作用を示す縦断面図であって、（ａ）はシール部材の押さえ付け前、（ｂ）はシール部材の押さえ付け後It is a longitudinal cross-sectional view which shows the water stop effect | action of a cylinder water stop part, Comprising: (a) is before pressing a sealing member, (b) is after pressing a sealing member 本願発明に係る止水機構（ケーブル止水部）の一例を示す縦断面図The longitudinal cross-sectional view which shows an example of the water stop mechanism (cable water stop part) which concerns on this invention 図３に示したケーブル止水部の分解斜視図FIG. 3 is an exploded perspective view of the cable water stop shown in FIG. 本願発明に係る止水機構（ケーブル止水部）の他例を示す縦断面図The longitudinal cross-sectional view which shows the other example of the water stop mechanism (cable water stop part) which concerns on this invention 本願発明に係る止水機構（ケーブル止水部）のさらに他例を示す縦断面図The longitudinal cross-sectional view which shows the other example of the water stop mechanism (cable water stop part) which concerns on this invention 本願発明に係る止水機構（筒体止水部及びケーブル止水部）を適用した検査装置の全体構成を示し、（ａ）は正面図、（ｂ）は側面図The whole structure of the test | inspection apparatus which applied the water stop mechanism (cylinder water stop part and cable water stop part) based on this invention is shown, (a) is a front view, (b) is a side view.

この発明に係る止水機構を構成する筒体止水部１の一実施形態を図１及び図２に示す。この止水機構は、水道管等の管体Ｐの内部を調査するカメラ等の調査器具Ｅを、水密状態を確保しつつ管体Ｐ内に送り込むためのものであって、管体Ｐと調査器具Ｅを管体Ｐ内に送り込む筒体２との間の水密を確保する筒体止水部１が、筒体止水部本体３と、筒体シール部材４と、筒体シール押さえ部材５と、フランジパッキン６とを備えている。筒体シール部材４は、切れ目のない環状をしており、筒体止水部本体３の内面に形成された段差部７に設けられている。この筒体シール部材４の内径は筒体２の外径とほぼ同じである。また、フランジパッキン６の中心に形成される貫通孔の直径も、筒体２の外径とほぼ同じである。このため、筒体シール部材４及びフランジパッキン６に、スムーズに筒体２を通すことができる。この筒体止水部１は、フランジパッキン６を介して、排水フランジ８にボルト９で固定されている。 1 and 2 show an embodiment of a tubular water stop portion 1 constituting a water stop mechanism according to the present invention. This water stop mechanism is for sending a survey instrument E such as a camera for surveying the inside of a pipe P such as a water pipe into the pipe P while ensuring a watertight state. A cylindrical water-stopping portion 1 that ensures watertightness between the tubular body 2 that feeds the instrument E into the tubular body P includes a cylindrical water-stopping portion main body 3, a cylindrical sealing member 4, and a cylindrical seal pressing member 5. And a flange packing 6. The cylinder seal member 4 has a continuous annular shape, and is provided in a stepped portion 7 formed on the inner surface of the cylinder water stop main body 3. The inner diameter of the cylinder seal member 4 is substantially the same as the outer diameter of the cylinder 2. Further, the diameter of the through hole formed at the center of the flange packing 6 is substantially the same as the outer diameter of the cylindrical body 2. For this reason, the cylinder 2 can be smoothly passed through the cylinder seal member 4 and the flange packing 6. The tubular water stop portion 1 is fixed to a drainage flange 8 with a bolt 9 via a flange packing 6.

筒体シール押さえ部材５には調節ねじ１０が設けられており、この調節ねじ１０を筒体止水部本体３にねじ込むことによって、筒体シール押さえ部材５が筒体止水部本体３に固定される。この固定状態において、筒体シール部材４と筒体シール押さえ部材５との間には若干の隙間（２〜３ｍｍ程度）が生じている。このように隙間を設けることで、筒体２の抜き挿しを容易に行うことができる。このとき、筒体シール部材４は、筒体止水部本体３と筒体２の両方に当接した状態となっている。 The cylindrical seal pressing member 5 is provided with an adjusting screw 10, and the cylindrical seal pressing member 5 is fixed to the cylindrical water-stopping portion main body 3 by screwing the adjusting screw 10 into the cylindrical water-stopping portion main body 3. Is done. In this fixed state, a slight gap (about 2 to 3 mm) is generated between the cylindrical seal member 4 and the cylindrical seal pressing member 5. By providing such a gap, the cylindrical body 2 can be easily inserted and removed. At this time, the cylinder seal member 4 is in contact with both the cylinder water-stop portion main body 3 and the cylinder 2.

管体Ｐに通水を開始すると、その水圧によって筒体シール部材４が上向きに移動し筒体シール押さえ部材５の下端に当接し、その当接力によって図２（ｂ）に示すように扁平状に変形する。すると、筒体シール部材４が、筒体止水部本体３及び筒体２の両方に強く密接する（同図中の左右向き矢印を参照）。このように筒体シール部材４と、筒体止水部本体３及び筒体２とを密接させることにより、高い水密性を確保することができる。 When water is passed through the pipe body P, the cylinder seal member 4 is moved upward by the water pressure and comes into contact with the lower end of the cylinder seal presser member 5, and is flattened as shown in FIG. Transforms into Then, the cylinder seal member 4 is in strong and close contact with both the cylinder waterstop main body 3 and the cylinder 2 (see the left-right arrow in the figure). Thus, high water-tightness is securable by making the cylinder seal member 4, the cylinder water-stop part main body 3, and the cylinder 2 closely.

筒体シール部材４で、主として筒体止水部１の上部からの漏水を防止する一方で、フランジパッキン６で、主として筒体止水部１の下部からの漏水を防止する。このように、筒体シール部材４とフランジパッキン６を併用することによって、筒体止水部１における水密性を一層向上することができる。なお、筒体シール部材４のみで十分な水密性が確保できる場合は、フランジパッキン６を用いない構成とすることもできる。 The tubular seal member 4 mainly prevents water leakage from the upper portion of the tubular water stop portion 1, while the flange packing 6 mainly prevents water leakage from the lower portion of the tubular water stop portion 1. As described above, by using the cylindrical seal member 4 and the flange packing 6 in combination, the water tightness in the cylindrical water stop portion 1 can be further improved. In addition, when sufficient water-tightness is securable only with the cylinder seal member 4, it can also be set as the structure which does not use the flange packing 6. FIG.

この発明に係る止水機構を構成するケーブル止水部１１の一例を図３に、その分解斜視図を図４にそれぞれ示す。このケーブル止水部１１は、調査器具ＥのケーブルＣを水密性を確保しつつ筒体２から引き出すためのものであって、ケーブル止水部本体１２と、ケーブルシール部材１３と、ケーブルシール押さえ部材１４と、ケーブルパッキン１５とを備えている。ケーブル止水部本体１２及びケーブルシール押さえ部材１４は、軸心を含む垂直面によって丁度二分割されている。ケーブルＣの先端に設けられた調査器具Ｅは、このケーブルＣの径よりも大径であるのが一般的である。このようにケーブル止水部本体１２等を二分割しておけば、調査器具Ｅを筒体２内に送り込んだ後にこの分割されたケーブル止水部本体１２等を一体にして、ケーブルＣをケーブル止水部１１から引き出すことができる。なお、この分割数は適宜変更することができ、例えば三分割としても同様の作用を発揮する。 An example of the cable water stop part 11 which comprises the water stop mechanism based on this invention is shown in FIG. 3, and the disassembled perspective view is shown in FIG. 4, respectively. This cable water stop part 11 is for pulling out the cable C of the investigation instrument E from the cylindrical body 2 while ensuring water tightness. The cable water stop part main body 12, the cable seal member 13, and the cable seal presser A member 14 and a cable packing 15 are provided. The cable water-stop part main body 12 and the cable seal pressing member 14 are just divided into two by a vertical surface including an axis. The survey instrument E provided at the tip of the cable C is generally larger in diameter than the diameter of the cable C. If the cable water stop body 12 is divided into two in this way, the cable C is connected to the cable C by integrating the divided cable water stop body 12 after the investigation instrument E is fed into the cylindrical body 2. It can be pulled out from the water stop part 11. Note that the number of divisions can be changed as appropriate, and for example, the same effect can be achieved even when divided into three.

ケーブル止水部本体１２は、固定ねじ１６を用いて環状のシール部材１７を介してフランジ１８にねじ止めされる。ケーブルシール押さえ部材１４には、二分割されたワッシャー１９が９０度回転させた状態で宛がわれた上で、ケーブル止水部本体１２に調節ねじ２０でねじ止めされる。 The cable water stop main body 12 is screwed to the flange 18 via an annular seal member 17 using a fixing screw 16. The cable seal holding member 14 is attached to the cable water stop body 12 with the adjusting screw 20 after the two-part washer 19 is rotated 90 degrees.

ケーブルシール部材１３は、螺旋状をしており、ケーブル止水部本体１２の内面に形成された段差部２１に設けられる。このケーブルシール部材１３の内径（螺旋の巻き内径）はケーブルＣの外径とほぼ同じである。このケーブル止水部１１にケーブルＣを通す際は、ケーブルシール押さえ部材１４をケーブル止水部本体１２に固定する調節ねじ２０を若干緩めておき、このケーブルシール押さえ部材１４とケーブルシール部材１３とが強く当接しないようにしておく。このようにすることによって、ケーブルＣをケーブルシール部材１３にスムーズに通すことができる。 The cable seal member 13 has a spiral shape and is provided in a step portion 21 formed on the inner surface of the cable water stop main body 12. The inner diameter (spiral winding inner diameter) of the cable seal member 13 is substantially the same as the outer diameter of the cable C. When the cable C is passed through the cable water stop portion 11, the adjustment screw 20 for fixing the cable seal press member 14 to the cable water stop portion main body 12 is slightly loosened, and the cable seal hold member 14, the cable seal member 13, Do not make strong contact. By doing in this way, the cable C can be smoothly passed through the cable seal member 13.

ケーブルＣをある程度送り込んだら、調節ねじ２０を締め付けてケーブル止水部本体１２とケーブルシール押さえ部材１４とをしっかりとねじ止めする。このとき、ケーブルシール部材１３がケーブルシール押さえ部材１４によって押さえ付けられて変形する。すると、その螺旋状の内径が縮径して、ケーブルＣの外径面に強く密接する。このようにケーブルシール部材１３とケーブルＣとを密接させることにより、高い水密性を確保することができる。また、ケーブルＣを送り込みつつ、水密性も確保し得るように、調節ねじ２０の締め付け量を適宜調節することもできる。 When the cable C is fed to a certain extent, the adjustment screw 20 is tightened to firmly fix the cable water stop body 12 and the cable seal pressing member 14. At this time, the cable seal member 13 is pressed by the cable seal pressing member 14 and deformed. Then, the inner diameter of the spiral is reduced, and the cable C is strongly in close contact with the outer diameter surface. Thus, by making the cable seal member 13 and the cable C closely contact each other, high water tightness can be ensured. Further, the tightening amount of the adjusting screw 20 can be adjusted as appropriate so that the watertightness can be secured while the cable C is fed.

ケーブルパッキン１５は、ケーブル止水部１１の受け部２２内に設けられており、このケーブル止水部１１は、ケーブルパッキン１５を介して、受け部２２にボルト２３で固定されている。このケーブルパッキン１５には、その中央にケーブルＣとほぼ同じ径の貫通孔２４が形成されるとともに、この貫通孔２４から外縁部に亘るギザギザ状の切れ込み２５が形成されている。調査器具Ｅをケーブルパッキン１５に通す際にこの切れ込み２５が開いて、ケーブルＣの径よりも大径の調査器具Ｅをスムーズに通す一方で、この調査器具Ｅが通った後は切れ込み２５が閉じて、ケーブルＣを隙間なく貫通孔２４に通すことができる。 The cable packing 15 is provided in the receiving portion 22 of the cable water stopping portion 11, and the cable water stopping portion 11 is fixed to the receiving portion 22 with a bolt 23 via the cable packing 15. In the cable packing 15, a through hole 24 having substantially the same diameter as the cable C is formed at the center, and a notch 25 is formed from the through hole 24 to the outer edge. The slit 25 is opened when the inspection instrument E is passed through the cable packing 15, and the inspection instrument E having a diameter larger than the diameter of the cable C is smoothly passed, while the slit 25 is closed after the inspection instrument E has passed. Thus, the cable C can be passed through the through hole 24 without a gap.

ケーブルシール部材１３で、主としてケーブル止水部１１の上部からの漏水を防止する一方で、このケーブルパッキン１５で、主としてケーブル止水部１１の下部からの漏水を防止する。このように、ケーブルシール部材１３とケーブルパッキン１５を併用することによって、ケーブル止水部１１における水密性を一層向上することができる。 The cable seal member 13 mainly prevents water leakage from the upper portion of the cable water stop portion 11, while the cable packing 15 mainly prevents water leakage from the lower portion of the cable water stop portion 11. As described above, by using the cable seal member 13 and the cable packing 15 in combination, the water tightness in the cable water stop portion 11 can be further improved.

この実施形態においては、フランジ１８の凹部の深さｔ_１とケーブル止水部本体１２のフランジの厚みｔ_２はほぼ同じである。このため、ケーブル止水部本体１２とフランジ１８との間に厚みがｔ_３のシール部材１７が介することにより、ケーブル止水部本体１２とフランジ１８の下面に高さがｔ_４の段差が生じる。この段差によって、ケーブルパッキン１５の径方向の幅中心よりも内径側で、このケーブルパッキン１５にケーブル軸方向の強い押圧力が作用する。このように内径側で強い押圧力が作用すると、ケーブルパッキン１５の変形量がこの内径側で特に大きくなり、このケーブルパッキン１５の貫通孔２４の内径面と、ケーブルＣの外周面との密接度合いが一層高まる。さらに、この押圧力によりケーブルパッキン１５の切れ込み２５が閉じる作用も期待でき、ケーブル止水部１１における止水作用が向上する。また、同図中には示していないが、ケーブル止水部本体１２の対向する分割面にゴム等の止水部材を挟み込むことにより、その止水作用が一層高まることも期待できる。 In this embodiment, the depth t ₁ of the concave portion of the flange 18 and the thickness t ₂ of the flange of the cable water stop main body 12 are substantially the same. For this reason, when the sealing member 17 having a thickness of t ₃ is interposed between the cable water-stopping portion main body 12 and the flange 18, a step having a height of t ₄ is generated on the lower surfaces of the cable water-stopping portion main body 12 and the flange 18. . Due to this step, a strong pressing force in the cable axial direction acts on the cable packing 15 on the inner diameter side of the radial center of the cable packing 15. When a strong pressing force acts on the inner diameter side in this way, the deformation amount of the cable packing 15 becomes particularly large on the inner diameter side, and the closeness degree between the inner diameter surface of the through hole 24 of the cable packing 15 and the outer peripheral surface of the cable C. Will further increase. Furthermore, the action of closing the notch 25 of the cable packing 15 by this pressing force can be expected, and the water stop action in the cable water stop portion 11 is improved. Moreover, although not shown in the figure, it can be expected that the water-stopping action is further enhanced by sandwiching a water-stopping member such as rubber between the opposing split surfaces of the cable water-stopping body 12.

なお、ケーブルパッキン１５のみで十分な水密性が確保できる場合は、ケーブルシール部材１３を用いない構成とすることもできる。 In addition, when sufficient water-tightness is securable only with the cable packing 15, it can also be set as the structure which does not use the cable seal member 13. FIG.

この発明に係る止水機構を構成するケーブル止水部１１の他例を図５に示す。このケーブル止水部１１は、シール部材１７を用いない代わりに、受け部２２の上面のケーブルＣを通す貫通孔寄りに、高さがｔ_５の段差を形成した点において図３等に示したものと異なる。このように段差を形成することによっても、ケーブルパッキン１５の内径側でケーブル軸方向の強い押圧力を作用させることができ、上記と同様に、ケーブル止水部１１における止水作用を一層高めることができる。 FIG. 5 shows another example of the cable water stop portion 11 constituting the water stop mechanism according to the present invention. The cable water stopper 11, instead of not using the sealing member 17, the through hole closer through the cable C of the upper surface of the receiving portion 22, the height is shown in FIG. 3 or the like in that the formation of the level difference t ₅ Different from the one. By forming the step in this way, a strong pressing force in the cable axial direction can be applied on the inner diameter side of the cable packing 15 and, similarly to the above, the water stopping action in the cable water stopping portion 11 is further enhanced. Can do.

この発明に係る止水機構を構成するケーブル止水部１１のさらに他例を図６に示す。ボルト２３のねじ込みのみによってケーブルパッキン１５に強い押圧力を作用させて止水作用を発揮し得るのであれば、同図のように、シール部材１７を用いたり、受け部２２に段差を形成したりしない構成ももちろん採用することができる。 FIG. 6 shows still another example of the cable water stop portion 11 constituting the water stop mechanism according to the present invention. If a strong pressing force can be applied to the cable packing 15 only by screwing in the bolt 23 to exert a water stop function, the seal member 17 can be used as shown in FIG. Of course, it is possible to adopt a configuration that does not.

上記の各実施形態のようにケーブルシール部材１３を螺旋状とする代わりに、筒体シール部材４と同様に、切れ目のない環状のものを用いることもできる。ケーブルシール押さえ部材１４によるケーブルシール部材１３の押さえ付けによって、上述したのと同様に、高い水密性を確保することができるためである。 Instead of the cable seal member 13 having a spiral shape as in each of the above-described embodiments, a ring-shaped member having no breaks can be used similarly to the cylindrical seal member 4. This is because high water tightness can be ensured by pressing the cable seal member 13 with the cable seal press member 14 as described above.

上記実施形態として、ケーブル止水部本体１２等を分割した態様について示したが、ケーブルＣの外径と、調査器具Ｅの部分の外径がほぼ同一の場合は、これらを分割した態様とする必要はない。ケーブル止水部本体１２等に形成された貫通孔を通して、調査器具Ｅをスムーズに筒体２内に送り込むことができるためである。 As the above-mentioned embodiment, although the aspect which divided | segmented the cable water stop part main body 12 grade | etc., Was shown, when the outer diameter of the cable C and the outer diameter of the part of the investigation instrument E are substantially the same, it is set as the aspect which divided | segmented these There is no need. This is because the investigation instrument E can be smoothly fed into the cylindrical body 2 through the through hole formed in the cable water stop main body 12 or the like.

止水機構として、筒体止水部１とケーブル止水部１１の両方を採用した検査装置全体の外観を図７に示す。消火栓等の給水設備を接続する管体Ｐ（Ｔ字管）には仕切り弁２６が設けられ、この仕切り弁２６に、排水フランジ８を介して筒体止水部１が設けられる。この仕切り弁２６、排水フランジ８、筒体止水部１を貫通するように、筒体２が同軸に挿し込まれる。この筒体止水部１によって、排水フランジ８と筒体２との間の水密性が確保される。この筒体２の上端側には、ケーブル止水部１１が設けられ、このケーブル止水部１１でケーブルＣと筒体２との間の水密性が確保されるとともに、このケーブルＣが筒体２の外部に引き出される。筒体２の挿し込みは、ケーブル止水部１１側に固定された挿入用ハンドル２７に設けられたレバーブロック２８を操作して、排水フランジ８側に挿入用ハンドル２７を引き寄せることによって行われる。 FIG. 7 shows the external appearance of the entire inspection apparatus that employs both the tubular water stop portion 1 and the cable water stop portion 11 as the water stop mechanism. A pipe body P (T-shaped pipe) connecting water supply equipment such as a fire hydrant is provided with a partition valve 26, and the tubular water stop section 1 is provided on the partition valve 26 via a drainage flange 8. The cylinder 2 is inserted coaxially so as to pass through the gate valve 26, the drainage flange 8, and the cylinder water stop 1. The tubular waterstop 1 ensures water tightness between the drainage flange 8 and the tubular body 2. A cable water stop portion 11 is provided on the upper end side of the cylindrical body 2. The cable water stop portion 11 secures water tightness between the cable C and the cylindrical body 2, and the cable C is connected to the cylindrical body. 2 to the outside. The cylindrical body 2 is inserted by operating the lever block 28 provided on the insertion handle 27 fixed on the cable water stop portion 11 side and pulling the insertion handle 27 toward the drainage flange 8 side.

この検査装置においては、止水機構として、筒体止水部１とケーブル止水部１１の両方を採用した態様について示したが、いずれか一方の止水部を採用した態様とすることもできる。 In this inspection apparatus, although it showed about the aspect which employ | adopted both the cylindrical water stop part 1 and the cable water stop part 11 as a water stop mechanism, it can also be set as the aspect which employ | adopted any one water stop part. .

１筒体止水部
２筒体
３筒体止水部本体
４筒体シール部材
５筒体シール押さえ部材
６フランジパッキン
７段差部
８排水フランジ（本管側のフランジ）
９ボルト
１０調節ねじ
１１ケーブル止水部
１２ケーブル止水部本体
１３ケーブルシール部材
１４ケーブルシール押さえ部材
１５ケーブルパッキン
１６固定ねじ
１７シール部材
１８フランジ
１９ワッシャー
２０調節ねじ
２１段差部
２２受け部
２３ボルト
２４貫通孔
２５切れ込み
２６仕切り弁
２７挿入用ハンドル
２８レバーブロック
Ｃケーブル
Ｅ調査器具
Ｐ管体 DESCRIPTION OF SYMBOLS 1 Cylindrical water stop part 2 Cylindrical body 3 Cylindrical water stop part main body 4 Cylindrical seal member 5 Cylindrical seal pressing member 6 Flange packing 7 Step part 8 Drain flange (flange on the main pipe side)
9 Bolt 10 Adjustment screw 11 Cable waterproof part 12 Cable waterproof part body 13 Cable seal member 14 Cable seal holding member 15 Cable packing 16 Fixing screw 17 Seal member 18 Flange 19 Washer 20 Adjustment screw 21 Step part 22 Receiving part 23 Bolt 24 Through hole 25 Notch 26 Gate valve 27 Inserting handle 28 Lever block C Cable E Survey instrument P Tube

Claims

In the water stop mechanism for sending the investigation instrument (E) for examining the inside of the pipe body (P) into the pipe body (P) while ensuring a watertight state,
A tubular water stop portion (1) that secures water tightness between the tubular body (P) and the tubular body (2) that feeds the investigation instrument (E) into the tubular body (P). The water portion (1) has a tubular water stop portion main body (3), a tubular seal member (4), and a tubular seal pressing member (5).
The cylindrical seal member (4) has an unbroken ring shape, and the cylindrical body (2) is inserted into the cylindrical seal member (4) provided in the cylindrical water stop main body (3). Water is passed through the pipe body (P), the tubular seal member (4) is pressed against the tubular body seal pressing member (5) by the water pressure accompanying the water flow, and the tubular body sealing member ( 4) The water stop mechanism characterized by deforming into a flat shape and preventing leakage of water from the tubular water stop portion (1) by the tubular seal member (4).

Between the cylindrical water stop part main body (3) and the flange (8) on the main pipe side connected to the cylindrical water stop part (1), the diameter of the cylindrical body (2) is substantially the same. The water stop mechanism according to claim 1, wherein a flange packing (6) having a through hole is interposed.

A cable water stopping part (11) for ensuring watertightness between the cable (C) of the investigation instrument (E) and the cylindrical body (2) is provided, and the cable water stopping part (11) is a cable water stopping part. A cable packing (15) in which a through hole (24) having a diameter substantially the same as the diameter of the cable (C) is formed between the main body (12) and the receiving portion (22) of the cable water stop portion (11). The cable packing (15) is provided with a pressing force in the axial direction of the cable (C), and the pressing force causes the inner surface of the through hole (24) and the outer peripheral surface of the cable (C). So that water leakage from the cable water stop portion (11) is prevented, and a seal member (17) is interposed between the cable water stop portion main body (12) and the flange (18). The cable water stop body (12) and the flange Between 18), the flange (the cable water stopper body than 18) (12) forms a step which projects downwards, by the step, the cable packing (15), from the outer diameter side The water stop mechanism according to claim 1, wherein the strong pressing force in the cable axial direction is applied on the inner diameter side.

In the water stop mechanism for sending the investigation instrument (E) for examining the inside of the pipe body (P) into the pipe body (P) while ensuring a watertight state,
A cable water stopping part (11) for ensuring watertightness between the cable (C) of the investigation instrument (E) and the cylindrical body (2) is provided, and the cable water stopping part (11) is a cable water stopping part. A cable packing (15) in which a through hole (24) having a diameter substantially the same as the diameter of the cable (C) is formed between the main body (12) and the receiving portion (22) of the cable water stop portion (11). The cable packing (15) is provided with a pressing force in the axial direction of the cable (C), and the pressing force causes the inner surface of the through hole (24) and the outer peripheral surface of the cable (C). So that water leakage from the cable water stop portion (11) is prevented, and a seal member (17) is interposed between the cable water stop portion main body (12) and the flange (18). The cable water stop body (12) and the flange Between 18), the flange (the cable water stopper body than 18) (12) forms a step which projects downwards, by the step, the cable packing (15), from the outer diameter side The water stop mechanism is characterized in that the strong pressing force in the cable axial direction is applied on the inner diameter side.