JP2020018141A - Flexible conduit tube, connection method of flexible conduit tube, and water cut-off member - Google Patents
Flexible conduit tube, connection method of flexible conduit tube, and water cut-off member Download PDFInfo
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本発明は、電線が挿通され、端部に接続部を有する可撓電線管、可撓電線管の接続方法、および可撓電線管に用いられる止水部材に関する。 The present invention relates to a flexible conduit having an electric wire inserted therein and having a connection portion at an end, a method of connecting the flexible conduit, and a water stopping member used for the flexible conduit.
例えば、地中埋設用の電線保護管として、可撓性を有する樹脂製の波付管が用いられる。このような可撓電線管を敷設するためには、複数の可撓電線管を接続する必要がある。したがって、可撓電線管同士を互いに接続可能な管継手などの接続手段が必要である。 For example, a resin-made corrugated pipe having flexibility is used as an underground wire protection pipe. In order to lay such a flexible conduit, it is necessary to connect a plurality of flexible conduits. Therefore, connecting means such as a pipe joint capable of connecting the flexible conduits to each other is required.
このような可撓電線管同士を接続するための手段としては、例えば、一方端に受口が形成され、他方端に差口が形成された波付合成樹脂管がある（特許文献１）。 As means for connecting such flexible conduits, for example, there is a corrugated synthetic resin pipe having a receiving port formed at one end and a spigot formed at the other end (Patent Document 1).
特許文献１において、差口の近傍には、ゴム輪とそのゴム輪より奥側の第１所定位置にリングが装着される。また、受口の近傍には、ゴム輪より先端側の第２所定位置にリングを受容しかつリングと協働して抜けを防止する溝が設けられる。また、受口先端と溝との間の内面に受口先端から溝に向かって縮径するテーパが形成される。他の波付合成樹脂管の差口が受口に挿入されると、溝がリングを受容し、溝とリングとが協働することで、波付合成樹脂管の抜けが防止される。 In Patent Literature 1, a rubber ring and a ring are attached to a first predetermined position on the back side of the rubber ring near the outlet. Further, a groove is provided near the receiving port at a second predetermined position on the distal end side of the rubber ring to receive the ring and cooperate with the ring to prevent the ring from coming off. Further, a taper is formed on the inner surface between the distal end of the receiving port and the groove, the diameter decreasing from the distal end of the receiving port toward the groove. When the spigot of another corrugated synthetic resin pipe is inserted into the socket, the groove receives the ring, and the groove and the ring cooperate to prevent the corrugated synthetic resin pipe from coming off.
また、継手本体で管体を接続した時、管体外周面と止水層との間にほぼ均等なクリアランスを形成することで、継手本体の取付け取外しが容易であり、水分を積極的に浸入させる水通路を確保して、止水層の迅速な吸水膨張により確実な止水効果を得ることができる管継手がある（特許文献２）。 In addition, when the pipe is connected with the joint body, a substantially uniform clearance is formed between the outer peripheral surface of the pipe body and the waterproof layer, so that the joint body can be easily attached and detached, and water can actively enter. There is a pipe joint that can secure a water passage to obtain a reliable water stopping effect by rapid water absorption and expansion of a water stopping layer (Patent Document 2).
特許文献２の管継手は、螺旋凹凸条を有する管体の端部同士を接続するものである。継手本体の内周面には、止水層として水密封止用繊維シートが設けられる。また、特許文献２の継手本体で管体を接続した時、接続される管体外周面と止水層との間には、略均等なクリアランスが形成されるので、管体と継手本体を接続する場合に、容易に管体との接続を行なうことができる。 The pipe joint of Patent Literature 2 connects end portions of a pipe having a spiral ridge. On the inner peripheral surface of the joint body, a watertight sealing fiber sheet is provided as a water blocking layer. Further, when the pipe is connected with the joint body of Patent Document 2, a substantially uniform clearance is formed between the outer peripheral surface of the connected pipe body and the waterproof layer, so that the pipe and the joint body are connected. In this case, connection with the pipe can be easily performed.
また、波付可撓管同士をワンタッチで容易に接続することができ、管継手部分が抜け落ちることがなく、確実に波付可撓管を固定することができ、さらには、水の浸入を確実に防止することができる波付可撓管の接続方法がある（特許文献３）。 In addition, the corrugated flexible tubes can be easily connected to each other with a single touch, the pipe joints do not fall off, the corrugated flexible tubes can be securely fixed, and furthermore, the infiltration of water is ensured. There is a method of connecting a flexible tube with corrugation that can be prevented in a short time (Patent Document 3).
特許文献３では、一方の端部に雄部を有する管継手において、雄部の内周面には吸水性不織布が設けられる。また、雄部は螺旋状部を有し、管外周にはゴムパッキンが設けられる。また、一方の端部に雌部を有する管継手において、雌部の内周面に吸水性不織布が設けられる。また、雌部は螺旋状部を有し、管内周にストッパリングを有する。それぞれの管継手は、波付管と螺合することができるとともに、雄型管継手と雌型管継手同士は、互いに直線的に嵌合することができる。 In Patent Document 3, in a pipe joint having a male portion at one end, a water-absorbing nonwoven fabric is provided on the inner peripheral surface of the male portion. The male part has a spiral part, and rubber packing is provided on the outer periphery of the tube. In a pipe joint having a female portion at one end, a water-absorbing nonwoven fabric is provided on the inner peripheral surface of the female portion. The female part has a spiral part and has a stopper ring on the inner circumference of the tube. Each pipe joint can be screwed with the corrugated pipe, and the male pipe joint and the female pipe joint can be fitted linearly with each other.
また、管路口部材にケーブル保護管を接続するにあたって、抜け止め対策や止水対策を行うための各種部材の組み付けを簡単且つ確実に行うことができる管接続構造がある（特許文献４）。 In addition, there is a pipe connection structure that can easily and surely assemble various members for taking measures against water drop and water stop when connecting a cable protection pipe to a pipe opening member (Patent Document 4).
特許文献４の管接続構造は、管継手の一端側に管路口部材を接続するとともに、この管継手の他端側に装着される機能部材を介してケーブル保護管が接続される。機能部材は、抜け止め用兼止水用であり、管継手の他端側に嵌合される嵌合筒部と、この嵌合筒部に一体的に形成されて管継手からの保護管の抜けを阻止する抜け止め材と、嵌合筒部に設けられて接続部分を水膨張性不織布からなる止水材とを備えている。 In the pipe connection structure of Patent Literature 4, a pipe port member is connected to one end of a pipe joint, and a cable protection pipe is connected via a functional member attached to the other end of the pipe joint. The functional member is for retaining and stopping water, and is provided with a fitting tube portion fitted to the other end of the pipe joint, and a protection tube formed integrally with the fitting tube portion from the pipe joint. It comprises a retaining material for preventing the detachment, and a water-stopping material provided on the fitting tubular portion and having a connection portion made of a water-expandable nonwoven fabric.
また、一端に管継手雄部を有し、他端に管継手雄部に嵌合する管継手雌部を有する管継手付き波付き管がある（特許文献５）。 There is also a pipe-fitted corrugated pipe having a male fitting at one end and a female fitting at the other end fitted to the male fitting (Patent Document 5).
特許文献５の管継手雄部は、その先端部の外周全周に亘って係止部が設けられ、係止部から管軸方向に所定距離隔てた位置にリング状の防水用パッキンを有している。また、管継手雌部は、接続相手側の管継手雄部が挿入された後、係止部に係止して管継手雌部から管継手雄部が抜けるのを防止する係止爪を有する抜け止めリング及びこの抜け止めリングを収納する抜け止めリング収納部を有している。 The male fitting of Patent Literature 5 is provided with a locking portion over the entire outer periphery of the distal end portion, and has a ring-shaped waterproof packing at a position separated from the locking portion by a predetermined distance in the pipe axis direction. ing. Further, the female fitting has a locking claw that is locked to the locking portion after the male fitting of the fitting is inserted to prevent the male fitting from being removed from the female fitting. It has a retaining ring and a retaining ring storage portion for storing the retaining ring.
しかし、特許文献１では、受口側の所定位置にリングとゴム輪の２つの部材を配置する必要があり、構造が複雑であるとともに、ゴム輪が劣化した場合には、雨水が電線管に侵入する可能性がある。 However, in Patent Literature 1, it is necessary to dispose two members, a ring and a rubber ring, at predetermined positions on the receiving side, and the structure is complicated, and when the rubber ring is deteriorated, rainwater flows to the conduit. Possible intrusion.
また、特許文献２では、電線管を接続する場合には、継手本体を用いて一方の電線管に螺合した後、逆方向に回転させることで、他方の電線管に螺合させる必要がある。このため、螺旋波を有する電線管にしか適用ができず、また、接続のための作業性が悪い。 Further, in Patent Literature 2, when connecting a conduit, it is necessary to screw the joint to the other conduit by screwing it to one conduit using the joint body and then rotating the conduit in the opposite direction. . For this reason, it can be applied only to a conduit having a spiral wave, and the workability for connection is poor.
また、特許文献３では、雄部継手と雌部継手は、ともに螺旋状部の内面に吸水性不織布が敷設され、継手の外周面または内周面にゴムパッキンまたはストッパリング等の部材が、吸水性不織布と相互に離間した位置に配置されている。このため、吸水性不織布とゴムパッキンまたはストッパリング等の部材を別々の位置に設けなければならず、電線管の継手や接続部の構造が複雑である。また、電線管に継手を装着した後に、さらに雄部継手と雌部継手を装着した電線管同士を相互に差し込む必要があり接続構造が複雑で手間がかかる。 Further, in Patent Document 3, the male joint and the female joint both have a water-absorbent nonwoven laid on the inner surface of the spiral portion, and a member such as a rubber packing or a stopper ring is provided on the outer or inner peripheral surface of the joint. It is arranged at a position separated from the non-woven fabric. For this reason, members such as a water-absorbent nonwoven fabric and rubber packing or a stopper ring must be provided at separate positions, and the structures of the joints and connecting portions of the conduits are complicated. In addition, after the joint is mounted on the conduit, the conduits having the male joint and the female joint must be inserted into each other, and the connection structure is complicated and time-consuming.
また、特許文献４は、管路口の接続部材の構造が複雑で、管継手と機能部材等複数の部材を有し、さらに抜け止め材や止水材を必要とするなど、多くの部材を必要とし、構造が複雑である。また、この構造は、電線管同士を直接挿入して接続させるものではない。 Further, Patent Document 4 requires a complicated structure of a connecting member at a pipe opening, has a plurality of members such as a pipe joint and a functional member, and further requires many members such as a stopper material and a water stopping material. And the structure is complicated. Also, this structure does not directly insert and connect the conduits.
また、特許文献５も、防水用パッキンと抜け止めリング等の部材を別々の位置に設けなければならず、電線管の継手や接続部の構造が複雑になる。 Also, in Patent Document 5, the members such as the waterproof packing and the retaining ring must be provided at different positions, which complicates the structure of the joint and the connecting portion of the conduit.
このように、従来の方法では、止水部の性能には問題はないものの、電線管の雄型継手部の構造が複雑となる問題がある。一方、止水性をより確実にするために、水膨張性不織布を用いた止水部を設ける方法が提案されている。しかし、この方法では、水膨張性不織布を雄型接続部の所定位置に巻き付ける必要があり、現場における作業に手間がかかる問題があった。また、場合によっては、空気中の湿気を吸って水膨張性不織布が膨潤して膨張してしまうため、施工現場にて、水膨張性不織布を電線管や管継手に巻きつける際に、巻付け施工性にばらつきが生じやすい。さらに膨潤により、水膨張性不褥布の直径が大きくなり過ぎて、雌型接続部に挿入できない場合がある。 As described above, in the conventional method, there is no problem in the performance of the water stopping portion, but there is a problem in that the structure of the male joint portion of the conduit is complicated. On the other hand, a method of providing a water-stopping portion using a water-swellable nonwoven fabric has been proposed in order to further ensure water-stopping. However, in this method, it is necessary to wind the water-swellable nonwoven fabric at a predetermined position of the male connection portion, and there is a problem that the work on site is troublesome. Also, in some cases, the water-swellable nonwoven fabric swells and expands due to the absorption of moisture in the air. The workability tends to vary. Further, the diameter of the water-swellable non-pressure cloth may be too large due to swelling, so that the cloth may not be inserted into the female connection portion.
本発明は、このような問題に鑑みてなされたもので、接続時の作業性が良好であり、高い止水性を得ることが可能な、可撓電線管、可撓電線管の接続方法、および可撓電線管に用いられる止水部材を提供することを目的とする。 The present invention has been made in view of such a problem, and has excellent workability at the time of connection, and is capable of obtaining high water stopping property, a flexible conduit, a method of connecting a flexible conduit, and An object of the present invention is to provide a water blocking member used for a flexible conduit tube.
前述した目的を達するために第１の発明は、可撓性を有する電線管であって、本体部と、前記本体部の一方の端部に設けられる雄型接続部と、前記本体部の他方の端部に設けられ、前記雄型接続部と嵌合可能な形状の雌型接続部と、を具備し、前記雄型接続部は、前記雄型接続部の先端部の外径よりも外径が小さく管軸方向に対して所定長さの止水部材配置部と、前記止水部材配置部に配置される止水部材と、を有し、前記止水部材は、止水部材本体と水膨張性不織布から構成され、前記止水部材本体はリング状の弾性部材であり、前記止水部材本体の外周部に前記水膨張性不織布が貼り付けられることを特徴とする可撓電線管である。 In order to achieve the above-mentioned object, a first invention is a flexible conduit tube, which comprises a main body, a male connecting portion provided at one end of the main body, and the other of the main body. And a female connection portion having a shape fittable with the male connection portion, the male connection portion being located outside the outer diameter of the distal end portion of the male connection portion. Water-stopping member arrangement portion having a small diameter and a predetermined length with respect to the pipe axis direction, and a water-stopping member arranged at the water-stopping member arrangement portion, wherein the water-stopping member has a water-stopping member body and A flexible electric conduit comprising a water-swellable nonwoven fabric, wherein the water-stopping member main body is a ring-shaped elastic member, and the water-swellable nonwoven fabric is attached to an outer peripheral portion of the water-stopping member main body. is there.
前記止水部材配置部の管軸方向奥側に、前記止水部材配置部より外径が大きく、前記雄型接続部の先端部の外径と略等しい直線状部が管軸方向の所定長さに形成されていることが望ましい。 A straight portion having a larger outer diameter than the water stopping member arrangement portion and substantially equal to the outer diameter of the distal end portion of the male connection portion has a predetermined length in the tube axis direction on the inner side of the water stopping member arrangement portion in the tube axis direction. It is desirable that it is formed in the shape.
前記止水部材配置部の管軸方向奥側に、山部と谷部が平坦で管軸方向に略平行なコルゲート部が管軸方向の所定長さに形成されており、前記山部の外径は、前記止水部材配置部の外径より大きく、前記雄型接続部の先端部の外径と略等しくてもよい。 A corrugated portion having a flat peak and a valley and a substantially parallel to the pipe axis direction is formed at a predetermined length in the pipe axis direction, and a corrugated portion is formed at a depth in a pipe axis direction deep side of the water stopping member disposition portion. The diameter may be larger than the outer diameter of the water blocking member arrangement part, and may be substantially equal to the outer diameter of the tip part of the male connection part.
前記雌型接続部の内径は、前記止水部材における前記水膨張性不織布の外径と略同一か、前記水膨張性不織布の外径よりも小さく、前記止水部材本体の外径より大きいことが望ましい。 The inner diameter of the female connection portion is substantially the same as the outer diameter of the water-swellable nonwoven fabric in the water-stopping member, or smaller than the outer diameter of the water-swellable nonwoven fabric, and larger than the outer diameter of the water-stopping member main body. Is desirable.
前記雌型接続部は、先端からの管軸方向の所定長さに直線状部が設けられ、前記雌型接続部の直線状部の管軸方向長さは、前記雄型接続部の直線状部の長さと前記止水部材配置部の長さとを合計した長さ以上であってもよい。 The female connection portion is provided with a linear portion at a predetermined length in the pipe axis direction from the tip, and the length of the linear portion of the female connection portion in the pipe axis direction is a linear shape of the male connection portion. The length may be equal to or greater than the sum of the length of the portion and the length of the water blocking member arrangement portion.
前記雌型接続部と前記本体部の境界部近傍において、内面に突出する突起が形成されてもよい。 A protrusion protruding from the inner surface may be formed near a boundary between the female connection portion and the main body.
前記止水部材本体の外周に、テーパ状の斜面部と大径部が設けられ、前記止水部材配置部は、管軸方向の断面において、略コの字型の形状を有してもよい。 A tapered slope portion and a large-diameter portion are provided on the outer periphery of the water-stopping member main body, and the water-stopping member-arranging portion may have a substantially U-shape in a cross section in the pipe axis direction. .
前記本体部には、略円形断面の螺旋波または独立波形状の波状部が繰り返して複数個形成されてもよい。 The main body may be formed with a plurality of wavy portions having a substantially circular cross section and a spiral wave or an independent wave shape.
前記本体部には、矩形断面の大径部と円形断面の小径部が交互に形成されてもよい。 The main body may have alternately formed large-diameter portions having a rectangular cross section and small-diameter portions having a circular cross section.
前記円形断面の小径部の略中央には、管軸方向に略対称に２つの微少突起が形成され、前記微少突起間には、凹部が形成されていてもよい。 At the approximate center of the small diameter portion of the circular cross section, two minute projections are formed substantially symmetrically in the tube axis direction, and a recess may be formed between the minute projections.
第１の発明によれば、止水部材が、弾性部材からなる止水部材本体に水膨張性不織布が貼り付けられて構成されるため、管継手を用いずに、雄型接続部を雌型接続部に直線的に差し込むだけで可撓電線管同士を容易に接続可能である。また、雄型接続部の管軸方向の１カ所に止水部材を設けるため、可撓電線管の雄部接続部の先端の構造が簡易になるとと同時に、現場での電線管の雄型接続部における止水部材の巻き付けが不要になる。このため、現場における可撓電線管同士の接続作業が容易になる。 According to the first invention, since the water-stopping member is configured by attaching the water-swellable nonwoven fabric to the water-stopping member main body made of the elastic member, the male connection portion is formed into the female type without using a pipe joint. The flexible conduits can be easily connected to each other simply by inserting the flexible conduit straight into the connection portion. In addition, since a water-stopping member is provided at one position in the pipe axis direction of the male connection portion, the structure of the distal end of the male connection portion of the flexible conduit is simplified, and at the same time, the male connection of the conduit at the site is performed. There is no need to wind the water blocking member in the section. For this reason, the connection work between the flexible conduits at the site is facilitated.
また、大口径の可撓電線管同士をねじ込んで接続する場合には、螺旋接続を行なうことは困難であるが、直線状に雄型接続部を雌型接続部に差し込むだけで、電線管を容易に接続することができるため、大口径の可撓電線管にも適用可能である。また、電線管本体の断面が円形断面の電線管だけでなく、電線管本体が角形の電線管にも適用することができる。 Also, when connecting large diameter flexible conduits by screwing them together, it is difficult to make a helical connection, but by simply inserting the male connection portion straight into the female connection portion, the conduit can be connected. Since it can be easily connected, it can be applied to a large-diameter flexible conduit tube. In addition, the present invention can be applied to not only a conduit having a circular cross-section but also a conduit having a rectangular conduit main body.
また、止水部材本体が弾性部材で形成されているので、雄型接続部と雌型接続部を嵌合させる時に、雄型接続部と雌型接続部を嵌合する場合の挿入抵抗を小さくすることができる。 Further, since the water blocking member main body is formed of an elastic member, when the male connecting portion and the female connecting portion are fitted, the insertion resistance when the male connecting portion and the female connecting portion are fitted is reduced. can do.
また、雄型接続部を雌型接続部と嵌合させた時に、地震などにより接続部の配置が少しずれたとしても、雄型接続部の直線状部によって、雄型接続部が雌型接続部から抜けることを抑制することができる。 Also, when the male connection part is fitted with the female connection part, even if the arrangement of the connection part is slightly shifted due to an earthquake or the like, the male connection part is connected to the female connection part by the straight part of the male connection part. It can be prevented from falling out of the part.
また、雌型接続部の内径を、止水部材本体の外径よりも大きくすることで、雄型接続部を雌型接続部に挿入する際の挿入抵抗を小さくすることができる。また、雌型接続部の内径を水膨張性不織布の外径よりも小さくすることで、雄型接続部が雌型接続部から抜けることを抑制することができる。 In addition, by making the inner diameter of the female connecting portion larger than the outer diameter of the water blocking member main body, the insertion resistance when inserting the male connecting portion into the female connecting portion can be reduced. Further, by making the inner diameter of the female connection portion smaller than the outer diameter of the water-swellable nonwoven fabric, it is possible to prevent the male connection portion from coming off the female connection portion.
また、雌型接続部の直線状部の長さを、雄型接続部の止水部材配置部の長さに雄型接続部の直線状部の長さを加えた合計の長さ以上とすることで、雌型接続部の直線状部と雄型接続部の直線状部を所定長さに渡って対向させることができる。このため、地震などの際に、接続部が少しずれたとしても雄型接続部が雌型接続部から抜けることを抑制することができる。 In addition, the length of the linear portion of the female connection portion is equal to or greater than the total length of the length of the water blocking member arrangement portion of the male connection portion and the length of the linear portion of the male connection portion. Thus, the linear portion of the female connecting portion and the linear portion of the male connecting portion can be opposed to each other over a predetermined length. For this reason, even if the connecting portion is slightly displaced in the event of an earthquake or the like, it is possible to prevent the male connecting portion from coming off the female connecting portion.
また、止水部材本体の外周にテーパ状の斜面部と大径部を形成することで、弾性部材が変形しやすく、挿入抵抗を低くすることが可能である。また、止水部材配置部の断面形状を略コの字型の形状をすることで、止水部材を安定配置しやすい。 Further, by forming the tapered slope portion and the large diameter portion on the outer periphery of the water blocking member main body, the elastic member is easily deformed, and the insertion resistance can be reduced. In addition, since the cross-sectional shape of the water-stopping member disposition portion is substantially U-shaped, the water-stopping member can be easily stably disposed.
また、雌型接続部と本体部の境界部近傍の内面に突出する突起が形成されれば、雄型接続部を雌型接続部に挿入した際に、突起がストッパとなって、雄型接続部が過剰に雌型接続部の奥側に挿入されることを防止することができる。 Further, if a projection is formed on the inner surface near the boundary between the female connection portion and the main body portion, the projection serves as a stopper when the male connection portion is inserted into the female connection portion, and the male connection portion is formed. It is possible to prevent the part from being excessively inserted into the back side of the female connection part.
また、可撓電線管の本体部としては、螺旋波、独立波の場合でも適用が可能であり、螺旋波の場合において、接続時にねじ込む必要がないため、作業が容易である。 In addition, as the main body of the flexible conduit, it is possible to apply even in the case of a spiral wave or an independent wave, and in the case of a spiral wave, it is not necessary to screw in at the time of connection, so that the work is easy.
また、可撓電線管の本体部が、矩形断面の大径部と円形断面の小径部が交互に形成されていることで、例えば、可撓電線管を上下左右に併設する際に、安定して配置することができる。 Further, since the main body portion of the flexible conduit is formed such that the large-diameter portion having a rectangular cross-section and the small-diameter portion having a circular cross-section are alternately formed, for example, when the flexible conduit is installed vertically and horizontally, it is stable. Can be arranged.
この際、円形断面の小径部の略中央に、略対称に２つの微少突起が形成され、２つの微少突起間に、凹部が形成されれば、長さ調整のため、電線管を切断する場合に、凹部を切断の位置決めとして使用することができる。 At this time, when the two minute projections are formed substantially symmetrically at substantially the center of the small diameter portion of the circular cross section, and a concave portion is formed between the two minute projections, when the conduit is cut to adjust the length. In addition, the recess can be used as a positioning for cutting.
第２の発明は、第１の発明にかかる可撓電線管が複数用いられ、一方の前記可撓電線管に形成された前記雄型接続部に配置された前記止水部材および前記雄型接続部の直線状部の外周部が、他方の前記可撓電線管に形成された前記雌型接続部の直線状部の内周部と、対向配置されて接続されることを特徴とする可撓電線管の接続構造である。 According to a second aspect of the present invention, a plurality of flexible conduits according to the first aspect of the present invention are used, and the water stopping member and the male connection are disposed at the male connecting portion formed on one of the flexible conduits. Wherein the outer peripheral portion of the linear portion of the portion is connected to the inner peripheral portion of the linear portion of the female connecting portion formed on the other flexible conduit so as to face and connect thereto. It is a connection structure of a conduit tube.
第２の発明によれば、抜け止めリング等の抜け止め構造を必要とせず、雄型接続部の直線状部と雌型接続部の直線状部を対向配置することで、簡易な構造によって、雄型接続部と雌型接続部の接続状態を維持することができる。 According to the second invention, the straight structure of the male connecting portion and the straight portion of the female connecting portion are disposed facing each other without requiring a retaining structure such as a retaining ring. The connection state between the male connection section and the female connection section can be maintained.
第３の発明は、第１の発明にかかる可撓電線管が複数用いられ、一方の前記可撓電線管に形成された前記雄型接続部を、他方の前記可撓電線管に形成された前記雌型接続部に管軸方向に挿入することで可撓電線管同士を接続することを特徴とする可撓電線管の接続方法である。 In a third aspect, a plurality of flexible conduits according to the first aspect are used, and the male connecting portion formed on one flexible conduit is formed on the other flexible conduit. A method for connecting flexible conduits, wherein the flexible conduits are connected to each other by inserting the flexible conduits into the female connection portion in a tube axis direction.
第３の発明によれば、管軸方向に雄型接続部を雌型接続部に挿入することで簡単に両者を接続できるので、螺旋管の回転接続よりも容易である。 According to the third aspect, the male connection can be easily connected to the female connection by inserting the male connection into the female connection in the pipe axis direction, which is easier than the rotary connection of the spiral pipe.
第４の発明は、止水部材本体と水膨張性不織布を有し、前記止水部材本体は、ゴム製または水膨張性ゴム製のリング状であり、前記止水部材本体の外周部に前記水膨張性不織布が貼り付けられることを特徴とする止水部材である。 A fourth invention has a water-stopping member main body and a water-swellable nonwoven fabric, wherein the water-stopping member main body is in a ring shape made of rubber or water-swellable rubber, and the outer periphery of the water-stopping member main body has A water-stopping member to which a water-swellable nonwoven fabric is attached.
前記止水部材本体の外周に、テーパ状の斜面部と大径部が設けられ、前記止水部材本体の内周部は略直線状であり、前記内周部に一つまたは複数の突部が設けられることが望ましい。 On the outer periphery of the water-stopping member main body, a tapered slope portion and a large-diameter portion are provided, an inner peripheral portion of the water-stopping member main body is substantially linear, and one or more protrusions are provided on the inner peripheral portion. Is desirably provided.
前記止水部材本体の前記斜面部の先端に突起が形成され、前記斜面部と前記大径部に前記水膨張性不織布が貼り付けられることが望ましい。 It is preferable that a protrusion is formed at a tip of the slope portion of the water blocking member main body, and the water-swellable nonwoven fabric is attached to the slope portion and the large-diameter portion.
前記水膨張性不織布は、前記止水部材本体の外周に巻き付けられ、前記止水部材本体の周方向の一部に、前記水膨張性不織布の両端部のラップ部を固定する凹部が設けられることが望ましい。 The water-swellable nonwoven fabric is wound around the outer periphery of the water-stopping member main body, and a concave portion for fixing wrap portions at both ends of the water-swellable nonwoven fabric is provided in a part of the water-stopping member main body in a circumferential direction. Is desirable.
第４の発明によれば、止水部材本体がゴム製または水膨張性ゴム製であり、止水部材本体のみでも止水性を有し、また、水膨張性不織布を電線管に貼り付けただけでも止水性を有するが、止水部材本体に水膨張部材を貼り付けて一体化することで、抜け止め効果と止水効果の両方の効果を得ることができる。 According to the fourth invention, the water-stopping member main body is made of rubber or water-expandable rubber, has water-stopping properties even with only the water-stopping member main body, and is obtained by simply attaching the water-expandable nonwoven fabric to the conduit tube. However, although it has water blocking properties, both the retaining effect and the water blocking effect can be obtained by attaching the water expanding member to the water blocking member main body and integrating them.
また、止水部材本体の外周にテーパ状の斜面部と大径部を形成することで、弾性部材が変形しやすく、挿入抵抗を低くすることが可能である。また、内周部に一つまたは複数の突部が設けることで、雌型接続部が雄型接続部に挿入される時に、止水部材本体の弾性変形が容易となり、さらに挿入抵抗を低くすることが可能である。 Further, by forming the tapered slope portion and the large diameter portion on the outer periphery of the water blocking member main body, the elastic member is easily deformed, and the insertion resistance can be reduced. Further, by providing one or a plurality of protrusions on the inner peripheral portion, when the female connection portion is inserted into the male connection portion, elastic deformation of the water blocking member main body is facilitated, and the insertion resistance is further reduced. It is possible.
また、止水部材本体の斜面部の先端に突起を形成することで、接続時等において、水膨張性不織布の剥がれやずれを抑制することができる。 Further, by forming a projection at the tip of the slope portion of the water-stopping member main body, peeling and displacement of the water-swellable nonwoven fabric during connection or the like can be suppressed.
また、止水部材本体の周方向の一部に、巻き付けられる水膨張性不織布の両端部のラップ部を固定する凹部が設けられれば、ラップ部が厚肉になることがない。このため、接続時における水膨張性不織布の剥がれを抑制することができる。 Further, if a concave portion for fixing the wrap portions at both ends of the water-swellable nonwoven fabric to be wound is provided in a part of the circumferential direction of the water-stopping member main body, the wrap portion does not become thick. For this reason, peeling of the water-swellable nonwoven fabric during connection can be suppressed.
本発明によれば、接続時の作業性が良好であり、高い止水性を得ることが可能な、可撓電線管、可撓電線管の接続方法、および可撓電線管に用いられる止水部材を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the workability | operativity at the time of a connection is favorable, and a flexible electric conduit, the connection method of a flexible electric conduit, and the water-stop member used for a flexible electric conduit which can obtain high water stoppage can be obtained. Can be provided.
以下、図面を参照しながら、本発明の実施形態にかかる可撓電線管について説明する。図１（ａ）は、可撓電線管１を示す正面図であり、図１（ｂ）は、図１（ａ）のＡ−Ａ線断面図である。可撓電線管１は、例えば高密度ポリエチレン製などの可撓性を有する電線管であり、主に、本体部３と、雄型接続部５と、雌型接続部７等から構成される。 Hereinafter, a flexible conduit according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1A is a front view showing the flexible conduit tube 1, and FIG. 1B is a cross-sectional view taken along line AA of FIG. 1A. The flexible conduit tube 1 is a flexible conduit tube made of, for example, high-density polyethylene, and mainly includes a main body 3, a male connection portion 5, a female connection portion 7, and the like.
本体部３は、矩形断面の大径部１５と円形断面の小径部１７が交互に形成される。なお、大径部１５は、断面形状が略正方形状であり、大径部１５の径（１辺の長さ）は、小径部１７における外径よりも大きい。このように、略正方形状の大径部１５を設けることで、可撓電線管１を積み上げた際に、可撓電線管１を安定して配列することができる。 The main body 3 has large-diameter portions 15 having a rectangular cross-section and small-diameter portions 17 having a circular cross-section alternately formed. The large-diameter portion 15 has a substantially square cross section, and the diameter (length of one side) of the large-diameter portion 15 is larger than the outer diameter of the small-diameter portion 17. As described above, by providing the large-diameter portion 15 having a substantially square shape, when the flexible conduits 1 are stacked, the flexible conduits 1 can be stably arranged.
円形断面の小径部１７の略中央には、管軸方向に略対称に２つの微少突起１８が形成されており、２つの微少突起１８間には、凹部２０が形成されていてもよい。このように、２つの微少突起１８間に、凹部２０が形成されていることで、長さ調整のため、電線管を切断する場合に、凹部２０を切断することで、切断が容易になると同時に切断位置を位置決めしないでも正確な長さに切断できる。 At the approximate center of the small-diameter portion 17 having a circular cross section, two minute projections 18 are formed substantially symmetrically in the tube axis direction, and a recess 20 may be formed between the two minute projections 18. As described above, since the concave portion 20 is formed between the two minute projections 18, when the electric conduit is cut for length adjustment, the concave portion 20 is cut to facilitate cutting. It is possible to cut to an exact length without positioning the cutting position.
本体部３の一方の端部には、雄型接続部５が設けられる。雄型接続部５は、雄型接続部５の先端部の外径よりも外径が小さく管軸方向に対して所定長さの止水部材配置部１１と、止水部材配置部１１に配置される止水部材９とを有する。止水部材９については、詳細を後述する。
A male connection portion 5 is provided at one end of the main body 3. The male connecting portion 5 has a smaller outer diameter than the outer diameter of the distal end portion of the male connecting portion 5 and is disposed in the water stopping
止水部材配置部１１の管軸方向奥側（本体部３側）には、止水部材配置部１１より外径が大きく、雄型接続部５の先端部の外径と略等しい直線状部１３ａが管軸方向の所定長さに形成されている。すなわち、止水部材配置部１１と本体部３の間には、直線状部１３ａが形成される。直線状部１３ａは、内面および外面ともに、管軸方向に凹凸がない部位である。
A straight portion having a larger outer diameter than the water-stopping
本体部３の他方の端部には、雌型接続部７が設けられる。雌型接続部７は、前述した雄型接続部５と嵌合可能な形状を有する。雌型接続部７は、雌型接続部７の先端からの管軸方向の所定長さに直線状部１３ｂが設けられる。直線状部１３ｂは、内面および外面ともに、管軸方向に凹凸がない直線状の部位である。 The other end of the main body 3 is provided with a female connection 7. The female connector 7 has a shape that can be fitted with the male connector 5 described above. The female connecting portion 7 is provided with a linear portion 13b at a predetermined length in the pipe axis direction from the tip of the female connecting portion 7. The linear portion 13b is a linear portion having no irregularities in the tube axis direction on both the inner surface and the outer surface.
なお、本体部３の外径は、雄型接続部５の直線状部１３ａ及び雌型接続部７の直線状部１３ｂの外径よりも大きい。すなわち、直線状部１３ａ、１３ｂの奥側の本体部３との境界部には、段差が形成される。 The outer diameter of the main body 3 is larger than the outer diameter of the linear portion 13a of the male connecting portion 5 and the linear portion 13b of the female connecting portion 7. That is, a step is formed at the boundary between the straight portions 13a and 13b and the main body 3 on the far side.
次に、止水部材９について詳細に説明する。図２は、止水部材９の斜視図であり、図３は、止水部材９の軸方向の断面図である。止水部材９は、止水部材本体１９と水膨張性不織布２１等からなる。 Next, the water stopping member 9 will be described in detail. FIG. 2 is a perspective view of the water stopping member 9, and FIG. 3 is an axial sectional view of the water stopping member 9. The water-stopping member 9 includes a water-stopping member main body 19 and a water-swellable nonwoven fabric 21.
止水部材本体１９はリング状であり、ゴム製または水膨張性ゴム製等の弾性部材で形成される。止水部材本体１９は、例えば、クロロプレンゴム、ＥＰＤＭゴム等を適用可能である。止水部材本体１９の内周部は軸方向の断面において略直線状であり、止水部材本体１９の内周部には、一つまたは複数の突部２３が設けられる。突部２３は、周方向に連続して形成される。なお、図示した例では、３本の突部２３が所定の間隔をあけて配置される。 The water-stopping member main body 19 has a ring shape and is formed of an elastic member made of rubber or water-expandable rubber. For example, chloroprene rubber, EPDM rubber, or the like can be applied to the water blocking member main body 19. The inner peripheral portion of the water-stopping member main body 19 is substantially linear in cross section in the axial direction, and one or more protrusions 23 are provided on the inner peripheral portion of the water-stopping member main body 19. The protrusion 23 is formed continuously in the circumferential direction. In the illustrated example, three protrusions 23 are arranged at predetermined intervals.
また、止水部材本体１９の外周には、軸方向の断面において、テーパ状の斜面部２９と軸方向に略平行な大径部３１が設けられる。止水部材９は、斜面部２９（縮径部側）が、雄型接続部５の管軸方向の先端側に位置し、大径部３１が本体部３側に位置する向きで、止水部材配置部１１に配置される。
On the outer periphery of the water-stopping member main body 19, a tapered slope portion 29 and a large-diameter portion 31 substantially parallel to the axial direction are provided in the axial cross section. The water-stopping member 9 is oriented such that the inclined surface 29 (reduced-diameter portion side) is located on the distal end side of the male connection portion 5 in the tube axis direction, and the large-diameter portion 31 is located on the body portion 3 side. It is arranged in the
さらに、図３に示すように、止水部材本体１９の斜面部２９の先端には、突起２７が形成される。水膨張性不織布２１は、先端部が突起２７に突き当たり、止水部材本体１９の外周部の斜面部２９と大径部３１に貼り付けられる。すなわち、水膨張性不織布２１は、斜面部２９と大径部３１との総長に略対応した幅で、止水部材本体１９の外周長に略対応した長さの帯状である。なお、水膨張性不織布２１は、例えば、ポリエステル繊維とポリアクリル酸ナトリウム繊維を所定割合で配合したものを適用可能である。 Further, as shown in FIG. 3, a projection 27 is formed at the tip of the slope portion 29 of the water blocking member main body 19. The water-swellable nonwoven fabric 21 has its tip end abutting on the projection 27 and is attached to the slope portion 29 and the large-diameter portion 31 on the outer periphery of the water-stopping member main body 19. That is, the water-swellable nonwoven fabric 21 has a width substantially corresponding to the total length of the inclined surface portion 29 and the large-diameter portion 31, and a belt shape having a length substantially corresponding to the outer peripheral length of the water-stopping member main body 19. The water-swellable nonwoven fabric 21 may be, for example, a mixture of polyester fibers and sodium polyacrylate fibers at a predetermined ratio.
図４（ａ）は、止水部材９の部分背面図である。水膨張性不織布２１を止水部材本体１９の外周に巻き付ける際には、その両端部に隙間が形成されないように、ラップ部２５が形成される。ラップ部２５は、水膨張性不織布２１が重なるため、止水部材９の外径が部分的に大きくなる。 FIG. 4A is a partial rear view of the water stopping member 9. When the water-swellable nonwoven fabric 21 is wound around the outer periphery of the water blocking member main body 19, the wrap portion 25 is formed so that no gap is formed at both ends. Since the water-swellable nonwoven fabric 21 overlaps the wrap portion 25, the outer diameter of the water-stopping member 9 partially increases.
これを解消するため、図４（ｂ）に示すように、止水部材本体１９の周方向の一部に、水膨張性不織布２１の両端部のラップ部２５を収容して固定する凹部３３を設けてもよい。水膨張性不織布２１の厚みと略等しい深さの凹部３３を形成し、凹部３３の周方向の長さよりも、水膨張性不織布２１の周方向のラップ長を短くすることで、ラップ部２５において、止水部材９の外径が大きくなることを抑制することができる。 In order to solve this, as shown in FIG. 4B, a concave portion 33 for accommodating and fixing the wrap portions 25 at both ends of the water-swellable nonwoven fabric 21 is provided in a part of the circumferential direction of the water-stopping member main body 19. It may be provided. By forming the concave portion 33 having a depth substantially equal to the thickness of the water-swellable nonwoven fabric 21 and making the circumferential wrap length of the water-swellable nonwoven fabric 21 shorter than the circumferential length of the concave portion 33, the wrap portion 25 In addition, an increase in the outer diameter of the water blocking member 9 can be suppressed.
次に、複数の可撓電線管１を用いた、可撓電線管１同士の接続方法について説明する。まず、図５（ａ）に示すように、一対の可撓電線管１を用い、一方の可撓電線管１に形成された雄型接続部５と他方の可撓電線管１に形成された雌型接続部７とを対向して配置する。 Next, a method for connecting the flexible conduits 1 using the plurality of flexible conduits 1 will be described. First, as shown in FIG. 5 (a), a pair of flexible conduits 1 was used, and the male connection portion 5 formed on one flexible conduit 1 and the other flexible conduit 1 were formed. The female connection part 7 is arranged to face.
この状態から、図５（ｂ）に示すように、一方の可撓電線管１に形成された雄型接続部５を、他方の可撓電線管１に形成された雌型接続部７に管軸方向に挿入する（図中矢印Ｂ）。 From this state, as shown in FIG. 5 (b), the male connection part 5 formed on one flexible conduit 1 is connected to the female connection part 7 formed on the other flexible conduit 1. Insert in the axial direction (arrow B in the figure).
図６は、図５（ａ）のＣ部拡大図である。止水部材配置部１１は、管軸方向の断面において、略コの字型の形状を有する。止水部材９は、略コの字状の止水部材配置部１１に配置される。
FIG. 6 is an enlarged view of a portion C in FIG. The water blocking
ここで、雌型接続部７の内径（図中Ｅ）は、止水部材本体１９の大径部３１における外径（図中Ｆ）よりも大きい。このようにすることで、雄型接続部５を雌型接続部７に挿入した際に、止水部材本体１９が大きく潰されることがないため、挿入抵抗を小さくすることができる。 Here, the inner diameter (E in the figure) of the female connection portion 7 is larger than the outer diameter (F in the figure) of the large diameter portion 31 of the water blocking member main body 19. By doing so, when the male connection portion 5 is inserted into the female connection portion 7, the water-stopping member main body 19 is not significantly crushed, so that the insertion resistance can be reduced.
一方、雌型接続部７の内径（図中Ｅ）は、止水部材９の大径部３１における水膨張性不織布２１の外径（図中Ｇ）と略同一か、水膨張性不織布２１の外径よりも小さい。このようにすることで、雌型接続部７と水膨張性不織布２１とが接触するため、抜け止め効果を得ることができる。なお、水膨張性不織布２１は、止水部材本体１９と比較して、容易に収縮するため、水膨張性不織布２１が雌型接続部７の内面と接触しても、雄型接続部５を雌型接続部７へ挿入する際の抵抗の増大は小さい。 On the other hand, the inner diameter (E in the figure) of the female connection portion 7 is substantially the same as the outer diameter (G in the figure) of the water-swellable nonwoven fabric 21 in the large-diameter portion 31 of the water-stopping member 9, or is smaller than that of the water-swellable nonwoven fabric 21. Smaller than the outer diameter. By doing so, the female connecting portion 7 and the water-swellable nonwoven fabric 21 come into contact with each other, so that a retaining effect can be obtained. Since the water-swellable nonwoven fabric 21 contracts more easily than the water-stopping member main body 19, even if the water-swellable nonwoven fabric 21 comes into contact with the inner surface of the female connection portion 7, the male connection portion 5 The increase in resistance when inserted into the female connector 7 is small.
さらに、図５（ｃ）に示すように、雄型接続部５を完全に雌型接続部７へ挿入することで、一対の可撓電線管１同士が接続された、可撓電線管接続構造３５を得ることができる。 Further, as shown in FIG. 5C, a flexible conduit connection structure in which the pair of flexible conduits 1 are connected to each other by completely inserting the male connector 5 into the female connector 7. 35 can be obtained.
図７は、図５（ｃ）のＤ部拡大図である。可撓電線管接続構造３５においては、一方の可撓電線管１に形成された雄型接続部５に配置された止水部材９および雄型接続部５の直線状部１３ａの外周部が、他方の可撓電線管１に形成された雌型接続部７の直線状部１３ｂの内周部と対向配置されて接続される。この際、雌型接続部７の直線状部１３ｂの管軸方向長さ（図中Ｈ）は、雄型接続部５の直線状部１３ａの長さと止水部材配置部１１の長さとを合計した長さ（図中Ｉ）以上である。このように、雌型接続部７の直線状部１３ｂと雄型接続部５の直線状部１３ａ等が所定長さに渡って対向しているので、地震などにより接続部が少しずれたとしても嵌合状態が維持される。
FIG. 7 is an enlarged view of a portion D in FIG. In the flexible conduit connection structure 35, the outer periphery of the water blocking member 9 disposed on the male connector 5 formed on one flexible conduit 1 and the linear portion 13 a of the male connector 5 is The female connector 7 formed on the other flexible conduit tube 1 is opposed to and connected to the inner peripheral portion of the linear portion 13b of the female connector 7. At this time, the length (H in the figure) of the linear portion 13b of the female connecting portion 7 in the pipe axis direction is the sum of the length of the linear portion 13a of the male connecting portion 5 and the length of the water stopping
また、図示したように、可撓電線管接続構造３５においては、雌型接続部７（直線状部１３ｂ）の先端は、雄型接続部５の基部の本体部３の端面と接触し、それ以上、雄型接続部５が雌型接続部７へ挿入されることがない。すなわち、直線状部１３ａよりも外径の大きな本体部３の端部の段差部が、雌型接続部７と接触するストッパの役割を果たす。 Further, as shown in the figure, in the flexible conduit connection structure 35, the tip of the female connection portion 7 (the linear portion 13 b) contacts the end face of the main body portion 3 at the base of the male connection portion 5. As described above, the male connector 5 is not inserted into the female connector 7. That is, the step portion at the end of the main body portion 3 having an outer diameter larger than the linear portion 13a serves as a stopper that comes into contact with the female connection portion 7.
図８は、図７の雄型接続部５の直線状部１３ａに相当する部分に代えてコルゲート部１４とした可撓電線管２を用いた可撓電線管接続構造３５ｂを示す図である。コルゲート部１４は、止水部材配置部１１の管軸方向奥側に、管軸方向に略平行に所定長さに形成される。コルゲート部１４は、外面方向に突出する山部４３と外面において凹部となる谷部４５を有する。山部４３の外径は、止水部材配置部１１の外径よりも大きく、雄型接続部５の先端部の外径と略等しい。また、山部４３と谷部４５は平坦であり、山部４３と谷部４５の間に、両者を結ぶ斜面部が設けられる。山部４３と谷部４５を結ぶ斜面部は、略平面状であってもよいし、曲面状であってもよい。
FIG. 8 is a diagram showing a flexible conduit connection structure 35b using the flexible conduit 2 having the corrugated portion 14 instead of the portion corresponding to the linear portion 13a of the male connection portion 5 in FIG. The corrugated part 14 is formed at a predetermined length substantially parallel to the pipe axis direction on the back side in the pipe axis direction of the water blocking
可撓電線管接続構造３５ｂでは、雄型接続部５のコルゲート部１４の山部４３と雌型接続部７の直線状部１３ｂの内周部とが対向する。このように、雄型接続部５の直線状部１３ａに変わり、コルゲート部１４を形成することで、雄型接続部５の剛性が向上するので、雄型接続部５の配置の精度が向上して、位置決めがしやすい。これに対して、雌型接続部７に直線状部１３ｂが形成されているので、雌型接続部７はしなやかに雄型接続部５に嵌合することができる。 In the flexible conduit connection structure 35b, the ridge 43 of the corrugated portion 14 of the male connection portion 5 and the inner peripheral portion of the linear portion 13b of the female connection portion 7 face each other. In this manner, by forming the corrugated portion 14 instead of the linear portion 13a of the male connection portion 5, the rigidity of the male connection portion 5 is improved, so that the arrangement accuracy of the male connection portion 5 is improved. And positioning is easy. On the other hand, since the linear portion 13b is formed in the female connecting portion 7, the female connecting portion 7 can be fitted to the male connecting portion 5 flexibly.
なお、図９に示す可撓電線管接続構造３５ａのように、雌型接続部７の基部（雌型接続部７と本体部３との境界部近傍）の内面に、突起４１を設けてもよい。突起４１は、可撓電線管１の内面において、中心方向に突出する。突起４１の内径を、雄型接続部５の端部における外径よりも小さくすることで、雄型接続部５の先端が、雌型接続部７の奥側の本体部３へ挿入されることを防止するストッパとして機能させることができる。 In addition, like the flexible conduit connection structure 35 a shown in FIG. 9, the protrusion 41 may be provided on the inner surface of the base of the female connector 7 (near the boundary between the female connector 7 and the main body 3). Good. The protrusion 41 protrudes toward the center on the inner surface of the flexible conduit tube 1. By making the inner diameter of the projection 41 smaller than the outer diameter at the end of the male connection part 5, the tip of the male connection part 5 can be inserted into the body part 3 on the back side of the female connection part 7. Can be functioned as a stopper for preventing
尚、雌型接続部７と本体部３の境界部近傍において、内面に突出する突起４１が形成される場合には、直線状部１３ａ、１３ｂの奥側の本体部３との境界部の段差は必ずしも必要でない。 In the case where a protrusion 41 protruding from the inner surface is formed in the vicinity of the boundary between the female connecting portion 7 and the main body 3, a step at the boundary between the straight portions 13 a and 13 b and the main body 3 on the back side is formed. Is not necessary.
以上説明したように、本実施形態によれば、管継手を用いずに可撓電線管１の雄型接続部５を、雌型接続部７に直線的にずらして差し込むだけで接続が可能である。また、弾性部材からなる止水部材本体１９と水膨張性不織布２１が一体となった止水部材９を用いることで、可撓電線管１同士の接続部において、嵌合部と止水部とが複数個所に配置される場合と比較して、構造も簡易である。 As described above, according to the present embodiment, the connection can be performed by simply inserting the male connection portion 5 of the flexible conduit tube 1 into the female connection portion 7 without using a pipe joint. is there. Further, by using the water-stopping member 9 in which the water-stopping member main body 19 made of an elastic member and the water-swellable nonwoven fabric 21 are integrated, the fitting portion and the water-stopping portion are formed at the connection portion between the flexible conduits 1. The structure is simpler than that in the case where are arranged at a plurality of places.
また、止水部材９は、止水部材本体１９の弾性反発力と水膨張性不織布２１の止水効果の両者を利用できるため、より高い止水効果を期待できる。 Further, since the water-stopping member 9 can use both the elastic repulsive force of the water-stopping member main body 19 and the water-stopping effect of the water-swellable nonwoven fabric 21, a higher water-stopping effect can be expected.
また、水膨張性不織布２１は、予め止水部材本体１９の外周に巻き付けられるため、現場での水膨張性不織布２１の巻き付け作業が不要である。水膨張性不織布２１は伸び易いため、現場で水膨張性不織布２１を電線管等の端部に巻き付けようとすると、均一な厚さに巻くことが困難である。このため、水膨張性不織布２１の厚みばらつきが大きく、漏水の原因になることもある。これに対し、本実施形態では、予め工場等で止水部材本体１９と水膨張性不織布２１が一体となった止水部材９を用いることで、このような現場での作業が不要となる。このため、作業が容易であるとともに、高い止水性を確保することができる。 Further, since the water-swellable nonwoven fabric 21 is wound around the outer periphery of the water-stopping member main body 19 in advance, it is not necessary to wind the water-swellable nonwoven fabric 21 on site. Since the water-swellable nonwoven fabric 21 is easily stretched, it is difficult to wind the water-swellable nonwoven fabric 21 at an end portion of an electric conduit or the like in a uniform thickness. For this reason, the thickness variation of the water-swellable nonwoven fabric 21 is large and may cause water leakage. On the other hand, in the present embodiment, such a work at the site becomes unnecessary by using the water-stopping member 9 in which the water-stopping member main body 19 and the water-swellable nonwoven fabric 21 are integrated in a factory or the like in advance. For this reason, work is easy and high waterproofness can be ensured.
また、止水部材本体１９の内周部に、突部２３を設けることにより、止水部材本体１９の外周に圧力がかかった時に、より変形しやすい。特に、止水部材本体１９がゴム製であれば、ゴム材料としてのゴム弾性による変形の他、突部２３に応力集中して、形状的に変形しやすい。 In addition, by providing the protrusion 23 on the inner peripheral portion of the water-stopping member main body 19, the water-stopping member main body 19 is more easily deformed when pressure is applied to the outer periphery thereof. In particular, when the water-stopping member main body 19 is made of rubber, in addition to deformation due to rubber elasticity as a rubber material, stress is concentrated on the protruding portion 23 and the shape is easily deformed.
また、止水部材本体１９の外周部には、雄型接続部５の先端方向に縮径し、大径部３１に向けてテーパ状に肉厚が増加する斜面部２９が形成される。このため、雄型接続部５の挿入抵抗を低減することができる。 On the outer peripheral portion of the water blocking member main body 19, a slope portion 29 is formed in which the diameter is reduced toward the distal end of the male connection portion 5 and the thickness increases in a tapered shape toward the large diameter portion 31. For this reason, the insertion resistance of the male connection part 5 can be reduced.
また、水膨張性不織布２１は、止水部材本体１９の少なくとも斜面部２９と大径部３１を覆うように止水部材本体１９の外周に接着固定されている。この際に、斜面部２９の先端部に、突起２７を設けることで、水膨張性不織布２１を突起２７に合わせて貼り付けることができる。また、接続時に、水膨張性不織布２１が雌型接続部の端部に引っかかることを防止し、水膨張性不織布２１が剥がれることを抑制することができる。 The water-swellable nonwoven fabric 21 is bonded and fixed to the outer periphery of the water-stopping member main body 19 so as to cover at least the slope portion 29 and the large-diameter portion 31 of the water-stopping member main body 19. In this case, by providing the protrusion 27 at the tip of the slope 29, the water-swellable nonwoven fabric 21 can be adhered to the protrusion 27. Further, at the time of connection, the water-swellable nonwoven fabric 21 can be prevented from being caught on the end of the female connection portion, and peeling of the water-swellable nonwoven fabric 21 can be suppressed.
また、止水部材本体１９の外周に、帯状の水膨張性不織布２１を巻き付けた時に、水膨張性不織布２１の端部同士が重なりあうラップ部２５を形成することで、水膨張性不織布２１を止水部材本体１９の全周に渡って隙間なく貼り付けることができる。この際、ラップ部２５は、厚さが２倍になり、剥がれやすくなるが、凹部３３を設けることで、ラップ部２５における外径の変化を抑制し、水膨張性不織布２１を剥がれにくくすることができる。 Moreover, when the band-shaped water-swellable nonwoven fabric 21 is wound around the outer periphery of the water-stopping member main body 19, the water-swellable nonwoven fabric 21 is formed by forming a wrap portion 25 where the ends of the water-swellable nonwoven fabric 21 overlap each other. It can be stuck over the entire circumference of the water blocking member main body 19 without gaps. At this time, the thickness of the wrap portion 25 is doubled and the wrap portion 25 is easily peeled. However, by providing the concave portion 33, the change in the outer diameter of the wrap portion 25 is suppressed, and the water-swellable nonwoven fabric 21 is hardly peeled. Can be.
また、矩形断面の大径部１５と円形断面の小径部１７が交互に形成された可撓電線管１によれば、可撓電線管１を積み上げた際に、可撓電線管１を安定して配列することができる。 Further, according to the flexible conduit 1 in which the large-diameter portions 15 having the rectangular cross-section and the small-diameter portions 17 having the circular cross-section are alternately formed, when the flexible conduits 1 are stacked, the flexible conduit 1 is stabilized. Can be arranged.
なお、本発明では、雄型接続部５を雌型接続部７に挿入するのみで接続するため、いずれの形態の本体部３を有する可撓電線管に適用可能である。例えば、図１０（ａ）に示す可撓電線管１ａのように、本体部３の外周に、略円形断面の独立波形状の波状部３７が管軸方向に繰り返して複数個形成されてもよい。また、図１０（ｂ）に示す可撓電線管１ｂのように、本体部３の外周に、略円形断面の螺旋波形状の波状部３９が管軸方向に繰り返して複数個形成されてもよい。いずれの可撓電線管も、雄型接続部５を雌型接続部７に挿入するのみで接続することができる。 In the present invention, since the connection is made only by inserting the male connection portion 5 into the female connection portion 7, the present invention can be applied to a flexible conduit having any form of the main body portion 3. For example, as in a flexible conduit tube 1a shown in FIG. 10 (a), a plurality of wavy portions 37 each having a substantially circular cross section and having an independent wave shape may be repeatedly formed in the tube axis direction on the outer periphery of the main body portion 3. . Further, as in a flexible conduit tube 1b shown in FIG. 10B, a plurality of spiral wavy portions 39 having a substantially circular cross section may be repeatedly formed in the tube axis direction on the outer periphery of the main body portion 3. . Any of the flexible conduits can be connected only by inserting the male connection portion 5 into the female connection portion 7.
以上、添付図を参照しながら、本発明の実施の形態を説明したが、本発明の技術的範囲は、前述した実施の形態に左右されない。当業者であれば、特許請求の範囲に記載された技術的思想の範疇内において各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。 As described above, the embodiments of the present invention have been described with reference to the accompanying drawings. However, the technical scope of the present invention is not affected by the above-described embodiments. It is clear that a person skilled in the art can conceive various changes or modifications within the scope of the technical idea described in the claims, and these naturally fall within the technical scope of the present invention. It is understood to belong.
１、１ａ、１ｂ………可撓電線管
２………可撓電線管
３………本体部
５………雄型接続部
７………雌型接続部
９………止水部材
１１………止水部材配置部
１３ａ、１３ｂ………直線状部
１４………コルゲート部
１５………大径部
１７………小径部
１８………微少突起
１９………止水部材本体
２０………凹部
２１………水膨張性不織布
２３………突部
２５………ラップ部
２７………突起
２９………斜面部
３１………大径部
３３………凹部
３５、３５ａ、３５ｂ………可撓電線管接続構造
３７………独立波形状の波状部
３９………螺旋波形状の波状部
４１………突起
４３………山部
４５………谷部
1, 1a, 1b Flexible conduit 2 Flexible conduit 3 Body part 5 Male connection part 7 Female connection part 9
Claims (16)
本体部と、
前記本体部の一方の端部に設けられる雄型接続部と、
前記本体部の他方の端部に設けられ、前記雄型接続部と嵌合可能な形状の雌型接続部と、
を具備し、
前記雄型接続部は、前記雄型接続部の先端部の外径よりも外径が小さく管軸方向に対して所定長さの止水部材配置部と、前記止水部材配置部に配置される止水部材と、を有し、
前記止水部材は、止水部材本体と水膨張性不織布から構成され、前記止水部材本体はリング状の弾性部材であり、前記止水部材本体の外周部に前記水膨張性不織布が貼り付けられることを特徴とする可撓電線管。 A flexible conduit tube,
The main body,
A male connection provided at one end of the body,
A female connector provided at the other end of the main body and capable of fitting with the male connector,
With
The male connection portion has a smaller outer diameter than the outer diameter of the distal end portion of the male connection portion, and a water-stopping member disposition portion having a predetermined length in the pipe axis direction, and is disposed on the water-stopping member disposition portion. And a water stopping member,
The water-stopping member is composed of a water-stopping member main body and a water-swellable nonwoven fabric, the water-stopping member body is a ring-shaped elastic member, and the water-swellable nonwoven fabric is attached to an outer peripheral portion of the water-stopping member main body. A flexible conduit tube characterized in that:
前記止水部材本体は、ゴム製または水膨張性ゴム製のリング状であり、
前記止水部材本体の外周部に前記水膨張性不織布が貼り付けられることを特徴とする止水部材。 Having a water-stopping member body and a water-swellable nonwoven fabric,
The water-stopping member main body is in a ring shape made of rubber or water-expandable rubber,
The water-stopping member, wherein the water-swellable nonwoven fabric is attached to an outer peripheral portion of the water-stopping member main body.
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| JP2018141228A JP7079168B2 (en) | 2018-07-27 | 2018-07-27 | Flexible conduit, connection method of flexible conduit, and water stop member |
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| JP2018141228A JP7079168B2 (en) | 2018-07-27 | 2018-07-27 | Flexible conduit, connection method of flexible conduit, and water stop member |
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| JP2020018141A true JP2020018141A (en) | 2020-01-30 |
| JP7079168B2 JP7079168B2 (en) | 2022-06-01 |
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| JPH11351461A (en) * | 1998-06-08 | 1999-12-24 | Totaku Kogyo Kk | Corrugated tube made of synthetic resin |
| JP2002038876A (en) * | 2000-07-19 | 2002-02-06 | Kawasaki Steel Corp | Cut-off structure for connecting part of propulsion pipe |
| JP2004007996A (en) * | 2003-07-22 | 2004-01-08 | Furukawa Electric Co Ltd:The | Pipe joint connecting method and separating method thereof |
| JP2008014456A (en) * | 2006-07-07 | 2008-01-24 | Kyowa Rubber Kk | Tube joint |
| JP2009293763A (en) * | 2008-06-09 | 2009-12-17 | Tigers Polymer Corp | Pipe joint and pipe connection method |
| JP2011137518A (en) * | 2009-12-28 | 2011-07-14 | Sekisui Chem Co Ltd | Connection pipe, pipe connecting structure and method of manufacturing the pipe connecting structure |
| JP2012154488A (en) * | 2012-04-09 | 2012-08-16 | Furukawa Jushi Kako Kk | Pipe joint, pipe connection structure, and pipe connection method |
| JP2014025559A (en) * | 2012-07-30 | 2014-02-06 | Tigers Polymer Corp | Corrugated synthetic resin pipe |
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| JPH1082488A (en) * | 1996-09-06 | 1998-03-31 | Torii Kasei Kk | Corrugated pipe connecting structure |
| JPH11351461A (en) * | 1998-06-08 | 1999-12-24 | Totaku Kogyo Kk | Corrugated tube made of synthetic resin |
| JP2002038876A (en) * | 2000-07-19 | 2002-02-06 | Kawasaki Steel Corp | Cut-off structure for connecting part of propulsion pipe |
| JP2004007996A (en) * | 2003-07-22 | 2004-01-08 | Furukawa Electric Co Ltd:The | Pipe joint connecting method and separating method thereof |
| JP2008014456A (en) * | 2006-07-07 | 2008-01-24 | Kyowa Rubber Kk | Tube joint |
| JP2009293763A (en) * | 2008-06-09 | 2009-12-17 | Tigers Polymer Corp | Pipe joint and pipe connection method |
| JP2011137518A (en) * | 2009-12-28 | 2011-07-14 | Sekisui Chem Co Ltd | Connection pipe, pipe connecting structure and method of manufacturing the pipe connecting structure |
| JP2012154488A (en) * | 2012-04-09 | 2012-08-16 | Furukawa Jushi Kako Kk | Pipe joint, pipe connection structure, and pipe connection method |
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| JP7079168B2 (en) | 2022-06-01 |
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