JP2012154488A - Pipe joint, pipe connection structure, and pipe connection method - Google Patents
Pipe joint, pipe connection structure, and pipe connection method Download PDFInfo
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- JP2012154488A JP2012154488A JP2012088146A JP2012088146A JP2012154488A JP 2012154488 A JP2012154488 A JP 2012154488A JP 2012088146 A JP2012088146 A JP 2012088146A JP 2012088146 A JP2012088146 A JP 2012088146A JP 2012154488 A JP2012154488 A JP 2012154488A
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- 238000000034 method Methods 0.000 title claims description 6
- 238000012856 packing Methods 0.000 claims abstract description 46
- 210000000078 claw Anatomy 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- 230000002093 peripheral effect Effects 0.000 claims description 28
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000006260 foam Substances 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 5
- 239000004745 nonwoven fabric Substances 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000004078 waterproofing Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 23
- 239000002184 metal Substances 0.000 description 13
- 238000007789 sealing Methods 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 101000793686 Homo sapiens Azurocidin Proteins 0.000 description 3
- 229920001084 poly(chloroprene) Polymers 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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- Joints That Cut Off Fluids, And Hose Joints (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
Description
本発明は、外部から水が浸入することがなく防水性に優れ、管体の接続が容易な、管継手、管接続構造および管接続方法に関するものである。 The present invention relates to a pipe joint, a pipe connection structure, and a pipe connection method that are excellent in waterproofness without water entering from the outside and that allow easy connection of pipe bodies.
従来、電線等の保護管として、鋼管や樹脂性の波付き可撓管等が使用されている。これらの保護管は、必要に応じて保護管同志が接続され、または保護管と配線ボックスやスイッチボックス等とが接続されて使用される。これら保護管の接続部には、管継手が使用される。管継手の内部には、電線等が通されるため、特に屋外に使用される管継手には高い防水性が要求される。 Conventionally, steel pipes, resin-like corrugated flexible pipes, and the like are used as protective pipes for electric wires and the like. These protective tubes are used by connecting protective tubes to each other as necessary, or connecting a protective tube and a wiring box, a switch box, or the like. A pipe joint is used for the connection part of these protective pipes. Since electric wires and the like are passed through the inside of the pipe joint, high waterproofness is required particularly for pipe joints used outdoors.
このような、防水性を有する管継手としては、例えば、締め付けナットおよびゴム製のパッキンに管体を挿入し、さらに管体と管体の被覆層との間に筒状のスリーブを挿入し、継手本体をスリーブに被せるように締め付けナットと接合する被覆電線管用継手がある(特許文献1)。 As such a pipe joint having waterproofness, for example, a tubular body is inserted into a tightening nut and a rubber packing, and a tubular sleeve is inserted between the tubular body and the covering layer of the tubular body, There is a joint for a covered conduit tube that is joined to a tightening nut so that a joint body is placed on a sleeve (Patent Document 1).
また、合成樹脂製のシール体を用い、環状のシール体の一部を切断し、シール体に管体を挿入して、シール体を挟み込むように締め付けナットと継ぎ手本体とを接続可能な電線管用継手のシール体がある(特許文献2)。 Also, for conduits that use a synthetic resin sealing body, cut a part of the annular sealing body, insert the pipe body into the sealing body, and connect the tightening nut and joint body so as to sandwich the sealing body There is a joint sealing body (Patent Document 2).
しかし、特許文献1のような被覆電線管用継手では、部品点数が多いため、接続するのに手間がかかり、コストも高いという問題がある。特に、管体の取り付けには、継手本体と締め付けナットとを螺合させるため、取付には手間がかかる。また、被覆電線管の外周面が平滑でない場合には、パッキンが被覆電線管の外周面の凹凸に追従できずに防水性が劣る恐れがあるという問題がある。さらに、被覆電線管は切断時や接続時に外形が変形する場合があり、また、被覆電線管が可撓性を有すれば、被覆電線管の曲げ部近傍は、被覆電線管の外形が完全な真円とはならないため、パッキンと被覆電線管との間に隙間を生じる恐れがあり、この場合、防水性が劣る恐れがあるという問題がある。 However, the joint for a covered conduit tube as in Patent Document 1 has a problem that since it has a large number of parts, it takes time and labor to connect. In particular, the attachment of the tube body takes time since the joint body and the tightening nut are screwed together. Moreover, when the outer peripheral surface of a covered conduit is not smooth, there exists a problem that packing cannot follow the unevenness | corrugation of the outer peripheral surface of a covered conduit, and there exists a possibility that waterproofness may be inferior. In addition, the outer shape of the coated conduit may be deformed when it is cut or connected, and if the coated conduit is flexible, the outer shape of the coated conduit is completely near the bent portion of the coated conduit. Since it does not become a perfect circle, there is a possibility that a gap is formed between the packing and the covered electric wire tube. In this case, there is a problem that the waterproof property may be deteriorated.
また、特許文献2によるシール体も同様に、管体の取り付けには、継手本体と締め付けナットとを螺合させるため、取付には手間がかかるとい問題がある。また、管体の外周面が平滑でない場合には防水性が劣り、さらに、管体の切断時や接続時等における外形の変形によって、シール体と管体との間に隙間を生じる恐れがあり、この場合、防水性が劣る恐れがあるという問題がある。 Similarly, the sealing body according to Patent Document 2 has a problem in that it takes time to mount the pipe body because the joint body and the tightening nut are screwed together. In addition, when the outer peripheral surface of the tube body is not smooth, the waterproof property is inferior, and there is a possibility that a gap is formed between the seal body and the tube body due to deformation of the outer shape when the tube body is cut or connected. In this case, there is a problem that the waterproof property may be inferior.
本発明は、このような問題に鑑みてなされたもので、管体の外周面の凹凸によらず優れた防水性を有し、管体の接続が容易な、管継手、管接続構造および管接続方法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 a superior waterproof property regardless of the unevenness of the outer peripheral surface of the tubular body, and a tubular joint, a tubular connection structure, and a tubular body that can be easily connected to the tubular body. An object is to provide a connection method.
前述した目的を達成するため、第1の発明は、円筒状の本体部と、前記本体部の内部に設けられ、内径が縮径された突き当て部と、前記突き当て部に設けられた水膨張性の止水部材と、前記本体部に設けられ、独立波を有する波付き管を保持する保持部と、を具備し、前記水膨張性の止水部材は、リング状のウレタンフォームあるいはゴムパッキンにウレタンフォームあるいは吸水性不織布を重ねてリング状に構成したものであり、前記保持部は、前記本体部の端部近傍の内周に沿って、前記波付き管の谷部を保持する複数の爪部と、前記爪部を内周方向に締め付ける締め付け部と、を有し、前記保持部の一方の端部には、円筒軸方向に複数の切れ目が設けられて、先端部の内面に前記爪部が設けられ、前記締め付け部を前記本体部へ完全に締め込んだ状態で前記保持部の先端側から前記波付き管を挿入する際には、前記爪部は、前記本体部の内面に突出するとともに前記波付き管の挿入に抵抗となり難いようにテーパ形状を有し、前記波付き管を抜き去る際には前記波付き管に引っ掛かるような爪形状であり、前記締め付け部と前記保持部との間の一部にはギャップが形成され、前記締め付け部が前記本体部へ完全に締めこまれた状態では、前記爪部の外周は、前記締め付け部の先端内面によって押さえられて、前記波付き管を挿入するとともに保持することが可能であり、前記締め付け部が緩められると、前記爪部の外周には前記ギャップが位置し、前記爪部が外周方向に変形可能となって挿入された前記波付き管の取り外し状態となることを特徴とする管継手である。 In order to achieve the above-described object, the first invention includes a cylindrical main body portion, an abutting portion provided in the main body portion and having an inner diameter reduced, and water provided in the abutting portion. An inflatable water stop member, and a holding portion that is provided in the main body portion and holds a corrugated tube having an independent wave. The water expandable water stop member is a ring-shaped urethane foam or rubber. A urethane foam or a water-absorbing non-woven fabric is stacked on the packing to form a ring shape, and the holding portion holds a plurality of valley portions of the corrugated tube along the inner periphery in the vicinity of the end portion of the main body portion. A claw portion and a tightening portion for tightening the claw portion in an inner circumferential direction, and one end portion of the holding portion is provided with a plurality of cuts in a cylindrical axis direction, and is provided on an inner surface of the tip portion. The claw part is provided, and the fastening part is completely connected to the main body part. When the corrugated tube is inserted from the front end side of the holding portion in a state of being embedded, the claw portion protrudes from the inner surface of the main body portion and is tapered so as not to become resistance to insertion of the corrugated tube. A claw shape that is hooked to the corrugated tube when the corrugated tube is removed, and a gap is formed between a portion of the tightening portion and the holding portion, and the tightening In a state in which the part is completely tightened to the main body part, the outer periphery of the claw part is pressed by the inner surface of the distal end of the tightening part, and the waved tube can be inserted and held, When the tightening portion is loosened, the gap is located on the outer periphery of the claw portion, and the claw portion is deformable in the outer peripheral direction so that the inserted wavy tube is removed. It is a joint.
第1の発明によれば、水膨張性の止水部材が管継手の突き当て部に設けられるため、接続する管体の端部において止水をすることができ、また、止水部材は水膨張性を有するため、確実に管継手の防水を行うことができる。特に、管体の端部で止水を行うため、管体の外周面に凹凸があっても止水性が劣ることがなく、また、管体の外形が変形しても、止水性が劣ることがない。 According to the first invention, since the water-expandable water-stopping member is provided at the abutting portion of the pipe joint, water can be stopped at the end of the pipe to be connected, and the water-stopping member is water. Since it has expansibility, it is possible to reliably waterproof the pipe joint. In particular, since the water is stopped at the end of the tube body, the water stoppage is not inferior even if the outer peripheral surface of the tube is uneven, and the water stoppage is inferior even if the outer shape of the tube is deformed. There is no.
また、水膨張性の止水部材がウレタンフォームであれば、管体が管継手に挿入された際に、管体の端部によって、ウレタンフォームが極めて大きな変形量によって押しつぶされて止水されるため、管体の端部の切断面に凹凸がある場合でも、ウレタンフォームが管体端部の凹凸に追従して変形しつつ押し付けられるため、確実に止水を行うことができる。 Further, if the water-swellable water-stopping member is urethane foam, the urethane foam is crushed by an extremely large deformation amount and stopped by the end of the pipe when the pipe is inserted into the pipe joint. For this reason, even when the cut surface of the end portion of the tubular body is uneven, the urethane foam is pressed while deforming following the unevenness of the end portion of the tubular body, so that water can be reliably stopped.
また、管体が波付き管である場合には、複数の爪部によって、波付き管の波部を保持するため、波付き管と管継手とを確実に固定することができ、さらに、波付き管を管継手に挿入するのみで、波付き管と管継手とが接続されるため、管体の接続がきわめて容易である。 In addition, when the tubular body is a corrugated tube, the corrugated tube and the pipe joint can be securely fixed to hold the corrugated portion of the corrugated tube by the plurality of claws, and the corrugated tube can be securely fixed. Since the corrugated pipe and the pipe joint are connected only by inserting the attached pipe into the pipe joint, connection of the pipe bodies is extremely easy.
管継手は、一対の管体を両側より挿入して、それぞれの管体を保持できれば、管体同士の接続を、防水性を確保しつつ容易に行うことができ、また、一方の側に管体を挿入して、他方の側を配線ボックスやスイッチボックス等の周辺部材に取り付けることができれば、管体と周辺部材とを防水性を確保しつつ容易に接続することができる。 A pipe joint can be easily connected while securing waterproofness if a pair of pipes can be inserted from both sides and each pipe can be held. If the body is inserted and the other side can be attached to a peripheral member such as a wiring box or a switch box, the tubular body and the peripheral member can be easily connected while ensuring waterproofness.
第2の発明は、第1の発明にかかる管継手に波付き管が挿入され、前記締め付け部を前記本体部へ完全に締め込んだ状態で、前記爪部の先端が前記本体部の内周側に前記波付き管の外周側山部の径よりも小さくなる程度に突出し、前記波付き管が挿入される際には、前記爪部の先端の突出を波付き管の外周側山部での径よりも小さくなる程度に保つことが可能であり、前記波付き管の端部が前記突き当て部に設けられた前記水膨張性の止水部材に押し付けられ、前記波付き管によって前記水膨張性の止水部材が押しつぶされた状態で、前記波付き管と前記管継手とが接続されることを特徴とする管接続構造である。 According to a second aspect of the present invention, a corrugated tube is inserted into the pipe joint according to the first aspect of the present invention, and the tip of the claw portion is the inner periphery of the main body when the tightening portion is completely tightened into the main body. When the corrugated tube is inserted, the tip of the claw portion is projected at the outer peripheral mountain portion of the corrugated tube. The end of the corrugated tube is pressed against the water-swellable water stop member provided in the abutting portion, and the water corrugated tube In the pipe connection structure, the corrugated pipe and the pipe joint are connected in a state where the inflatable water stop member is crushed.
前記保持部の前記爪部が設けられた側とは他方の端部には、外周に突起が設けられ、前記締め付け部の内部にはリブが内周方向に設けられ、前記締め付け部を前記本体部へ完全に締め込んだ状態で、前記リブは、前記突起と噛み合って、前記突起が前記突き当て部の方向に前記締め付け部によって押さえつけられてもよい。 A protrusion on the outer periphery is provided on the other end of the holding part on the side where the claw part is provided, and a rib is provided in the inner peripheral direction inside the tightening part. In a state in which the rib is completely tightened, the rib may mesh with the protrusion, and the protrusion may be pressed by the tightening portion in the direction of the abutting portion.
第2の発明によれば、管継手の突き当て部に設けられた水膨張性の止水部材が、管体の端部によって押しつぶされた状態で、管体と管継手とが接続されるため、管体の外周面に凹凸があっても止水性が劣ることがなく、また、管体の外形が変形しても、止水性が劣ることがない。さらに、管体が管継手に挿入された際に、管体の端部によって、水膨張性の止水部材が押しつぶされて止水されるため、管体の端部の切断面に凹凸がある場合でも、水膨張性の止水部材が管体端部の凹凸に追従して変形しつつ押し付けられるため、確実に止水を行うことができる。 According to the second invention, since the water-expandable water stop member provided at the abutting portion of the pipe joint is crushed by the end of the pipe body, the pipe body and the pipe joint are connected. Even if the outer peripheral surface of the tube has irregularities, the water stoppage is not inferior, and even if the outer shape of the tube is deformed, the waterstop is not inferior. Furthermore, when the pipe body is inserted into the pipe joint, the water-expandable water-stopping member is crushed and stopped by the end part of the pipe body, so that the cut surface of the end part of the pipe body has irregularities. Even in this case, the water-swellable water-stopping member is pressed while deforming following the irregularities at the end of the tube body, so that water can be reliably stopped.
本発明によれば、管体の外周面の凹凸によらず優れた防水性を有し、管体の接続が容易な、管継手、管接続構造および管接続方法を提供することができる。 According to the present invention, it is possible to provide a pipe joint, a pipe connection structure, and a pipe connection method that have excellent waterproofness regardless of the unevenness of the outer peripheral surface of the pipe body and that allow easy connection of the pipe body.
以下、本発明の実施の形態にかかる管継手1について説明する。図1は、管継手1の分解斜視図であり、図2は、管継手1の組み立て斜視図である。 Hereinafter, the pipe joint 1 concerning embodiment of this invention is demonstrated. FIG. 1 is an exploded perspective view of the pipe joint 1, and FIG. 2 is an assembled perspective view of the pipe joint 1.
管継手1は、主に、本体3、パッキン5、チャックリング7、締め付け部9等から構成される。本体3は樹脂製の筒状部材である。本体3の両端には、雄ねじ部11が設けられる。なお、本体3の内部構造等の詳細については後述する。 The pipe joint 1 mainly includes a main body 3, a packing 5, a chuck ring 7, a tightening portion 9, and the like. The main body 3 is a cylindrical member made of resin. Male screw portions 11 are provided at both ends of the main body 3. Details of the internal structure of the main body 3 will be described later.
パッキン5はリング状であり、パッキン5の外径は、本体3の内径と略同じである。パッキン5は、水膨張性を有しており、変形量が大きいことが望ましい。例えば、パッキン5は、厚さが3mm以上であり、圧縮率で70%以上であることが望ましい。厚さが3mm以上かつ圧縮率が70%以上であれば、管体の接続時に、管体の端部の凹凸等に容易に追従できるとともに、パッキン5のセットや管体の挿入作業が容易となる。パッキン5としては、例えばウレタンフォームであることが望ましく、この場合、パッキン5は、極めて大きな変形が可能である。パッキン5の材質は、ウレタンフォーム単体を用いる他、この他にもネオプレンゴムスポンジにウレタンフォームを貼り付けたものや、ネオプレンゴムスポンジに吸水性不織布を貼り付けたものを使用するのが望ましく、同様の効果を得ることができる。尚、前記のように、パッキン5を2つの材質で、2段に構成する場合は、ネオプレンゴムスポンジの代わりに通常のゴムパッキンを用いて、これにウレタンフォームや吸水性不織布を重ねて構成することもできる。この場合に、2つの材料は貼り付けて固定する方が良いが、必ずしも固定せずに、重ねておくだけか、あるいは重ねてゴムパッキンにウレタンフォームや吸水性不織布をはめ込むだけでも良い。 The packing 5 has a ring shape, and the outer diameter of the packing 5 is substantially the same as the inner diameter of the main body 3. The packing 5 is water-swellable and desirably has a large amount of deformation. For example, the packing 5 desirably has a thickness of 3 mm or more and a compression rate of 70% or more. If the thickness is 3 mm or more and the compression ratio is 70% or more, it is possible to easily follow the unevenness at the end of the tube when connecting the tube, and to easily set the packing 5 and insert the tube. Become. The packing 5 is preferably, for example, urethane foam. In this case, the packing 5 can be deformed extremely greatly. As the material of the packing 5, it is desirable to use a urethane foam alone, in addition to this, it is desirable to use a neoprene rubber sponge with a urethane foam or a neoprene rubber sponge with a water absorbent non-woven fabric. The effect of can be obtained. As described above, when the packing 5 is composed of two materials and is formed in two stages, a normal rubber packing is used instead of the neoprene rubber sponge, and urethane foam or a water-absorbing non-woven fabric is overlapped thereon. You can also. In this case, it is better to attach and fix the two materials. However, the two materials are not necessarily fixed, but may be simply stacked, or may be stacked and urethane foam or a water-absorbing non-woven fabric may be simply inserted into the rubber packing.
チャックリング7は、円筒状の樹脂性部材であり、可撓性を有する。チャックリング7の一方の端部には、円筒軸方向に複数の切れ目が設けられる。チャックリング7の内形は本体3の内径と略同じである。なお、チャックリング7の形状の詳細については後述する。 The chuck ring 7 is a cylindrical resin member and has flexibility. A plurality of cuts are provided in one end portion of the chuck ring 7 in the cylindrical axis direction. The inner shape of the chuck ring 7 is substantially the same as the inner diameter of the main body 3. The details of the shape of the chuck ring 7 will be described later.
締め付け部9は、円筒状の部材であり、内部には、雌ねじ部12が設けられる。雌ねじ部12は、雄ねじ部11と螺合可能である。したがって、図2に示すように、管継手1が組み立てられた状態では、締め付け部9a、9bが本体3の両端に取り付けられる。管継手1の内部には、パッキン5a、5b、チャックリング7a、7bがそれぞれ収まる。管体である波付き管13a、13bは、管継手1の両端の締め付け部9a、9bおよび内部のチャックリング7a、7b内に挿入されて接続される。 The tightening portion 9 is a cylindrical member, and a female screw portion 12 is provided inside. The female screw portion 12 can be screwed with the male screw portion 11. Therefore, as shown in FIG. 2, when the pipe joint 1 is assembled, the tightening portions 9 a and 9 b are attached to both ends of the main body 3. Packings 5a and 5b and chuck rings 7a and 7b are accommodated in the pipe joint 1, respectively. The corrugated pipes 13a and 13b, which are tubular bodies, are inserted and connected to the fastening portions 9a and 9b at both ends of the pipe joint 1 and the internal chuck rings 7a and 7b.
次に、管継手1の内部構造および管継手1による波付き管13の接続構造について説明する。図3は、組み立てられた状態の管継手1の断面図である。 Next, the internal structure of the pipe joint 1 and the connection structure of the corrugated pipe 13 by the pipe joint 1 will be described. FIG. 3 is a cross-sectional view of the pipe joint 1 in an assembled state.
円筒状の本体3の内部には、本体3の軸方向のほぼ中央に突き当て部23が設けられる。突き当て部23は、本体3の内径が縮径された部位である。管継手1に波付き管13が挿入された際には、波付き管13の端部は、突き当て部に突き当たる。すなわち、管継手1の内径は、接続する波付き管13の外径よりも小さく、突き当て部23の内径は波付き管13の外形よりも小さい。また、波付き管13の内径よりも突き当て部23の内径が大きければ、内部に電線等を挿入する際に電線等が突き当て部23に引っ掛かることがないため望ましい。 In the inside of the cylindrical main body 3, an abutting portion 23 is provided at substantially the center in the axial direction of the main body 3. The abutting portion 23 is a portion where the inner diameter of the main body 3 is reduced. When the corrugated pipe 13 is inserted into the pipe joint 1, the end of the corrugated pipe 13 abuts against the abutting portion. That is, the inner diameter of the pipe joint 1 is smaller than the outer diameter of the corrugated pipe 13 to be connected, and the inner diameter of the abutting portion 23 is smaller than the outer diameter of the corrugated pipe 13. Moreover, it is desirable that the inner diameter of the abutting portion 23 is larger than the inner diameter of the corrugated tube 13 because the electric wire or the like is not caught by the abutting portion 23 when the electric wire or the like is inserted therein.
突き当て部23の両側には、パッキン5a、5bがそれぞれ設けられる。パッキン5は、突き当て部23に対して、あらかじめ接着剤等によって接着されて固定される。この場合、例えばパッキン5の片面にあらかじめ両面テープを貼り付けておき、突き当て部23と接着してもよい。パッキン5の外径は突き当て部23の内径よりも十分大きいため、パッキン5は突き当て部23を超えて押し込まれることはない。 On both sides of the abutting portion 23, packings 5a and 5b are provided, respectively. The packing 5 is bonded and fixed to the abutting portion 23 in advance with an adhesive or the like. In this case, for example, a double-sided tape may be attached in advance to one side of the packing 5 and bonded to the abutting portion 23. Since the outer diameter of the packing 5 is sufficiently larger than the inner diameter of the abutting portion 23, the packing 5 is not pushed beyond the abutting portion 23.
本体3の両端部には波付き管13の保持部であるチャックリング7a、7bがセットされる。チャックリング7の一方の端部には複数の切れ目があり、チャックリング7の先端部には複数の保持爪15が内周方向に向けて設けられる。保持爪15は、チャックリング7の先端側から波付き管13を挿入する際には、波付き管13の挿入に抵抗となり難いようなテーパ形状を有し、波付き管13を抜き去る際には波付き管13に引っ掛かるような爪形状を有する。 Chuck rings 7 a and 7 b that are holding portions of the corrugated tube 13 are set on both ends of the main body 3. There are a plurality of cuts at one end of the chuck ring 7, and a plurality of holding claws 15 are provided at the tip of the chuck ring 7 in the inner circumferential direction. The holding claw 15 has a taper shape that hardly resists insertion of the corrugated tube 13 when the corrugated tube 13 is inserted from the tip side of the chuck ring 7, and when the corrugated tube 13 is removed. Has a claw shape to be caught by the corrugated tube 13.
チャックリング7の保持爪15が設けられた側とは他方の端部には、外周に突起21が設けられる。突起21は締め付け部9によって押さえつけられる部位である。 A protrusion 21 is provided on the outer periphery at the other end of the chuck ring 7 where the holding claw 15 is provided. The protrusion 21 is a part that is pressed down by the tightening portion 9.
締め付け部9は、本体3の雄ねじ部11と締め付け部9の雌ねじ部12とで接合される。締め付け部9の内部にはリブ19が内周方向に設けられる。リブ19は、締め付け部9を本体3へ締めこんで接合した際に、チャックリング7の突起21と噛み合って、チャックリング7を本体3方向に押さえつける。 The tightening portion 9 is joined by the male screw portion 11 of the main body 3 and the female screw portion 12 of the tightening portion 9. A rib 19 is provided inside the tightening portion 9 in the inner circumferential direction. The rib 19 meshes with the protrusion 21 of the chuck ring 7 and presses the chuck ring 7 in the direction of the main body 3 when the fastening portion 9 is fastened and joined to the main body 3.
締め付け部9のリブ19と先端部との間には、チャックリング7との間にギャップ17が形成される。締め付け部9を本体3へ完全に締めこんだ状態では、チャックリング7の先端の外周は、締め付け部9の先端内面によって押さえられるため、保持爪15の外周方向への変形が抑制される。したがって、保持爪15は確実に波付き管13を保持する。一方、締め付け部9を緩めると、保持爪15の外周には、ギャップ17が位置するため、保持爪15は容易に外周方向に変形可能となり、波付き管13を取り外すことが可能となる。 A gap 17 is formed between the chuck ring 7 and the rib 19 of the tightening portion 9 and the tip portion. In the state where the tightening portion 9 is completely tightened to the main body 3, the outer periphery of the tip of the chuck ring 7 is pressed by the inner surface of the front end of the tightening portion 9, so that the deformation of the holding claws 15 in the outer peripheral direction is suppressed. Therefore, the holding claw 15 reliably holds the corrugated tube 13. On the other hand, when the tightening portion 9 is loosened, the gap 17 is located on the outer periphery of the holding claw 15, so that the holding claw 15 can be easily deformed in the outer peripheral direction, and the corrugated tube 13 can be removed.
図4は、管継手1に波付き管13a、13bを挿入した状態を示す図である。波付き管13aが管継手1に挿入される(図中矢印A方向)。波付き管13aを挿入する際には、保持爪15のテーパ形状によって、波付き管13aは保持爪15に引っ掛かることなく挿入可能である。 FIG. 4 is a view showing a state where the corrugated pipes 13 a and 13 b are inserted into the pipe joint 1. The corrugated pipe 13a is inserted into the pipe joint 1 (in the direction of arrow A in the figure). When the corrugated tube 13 a is inserted, the corrugated tube 13 a can be inserted without being caught by the retaining claws 15 due to the tapered shape of the retaining claws 15.
波付き管13bは、管継手1に完全に挿入されて保持された状態である。この状態においては、波付き管13bの先端でパッキン5bが押しつぶされる。パッキン5bは極めて大きな変形量を有するため、波付き管13bの先端形状に追従することができ、確実に止水をすることができる。この状態においては、波付き管13bの谷部25全周にわたり保持爪15が引っ掛かり、波付き管13bは管継手1から抜けることはない。 The corrugated pipe 13b is in a state of being completely inserted and held in the pipe joint 1. In this state, the packing 5b is crushed at the tip of the corrugated tube 13b. Since the packing 5b has a very large amount of deformation, the packing 5b can follow the shape of the tip of the corrugated tube 13b and can reliably stop water. In this state, the holding claw 15 is caught over the entire circumference of the valley portion 25 of the corrugated tube 13 b, and the corrugated tube 13 b does not come out of the pipe joint 1.
以上説明したように、第1の実施の形態にかかる管継手1によれば、防水性を確保しつつ波付き管13同士を容易に接続することができる。また、パッキン5は水膨張性を有し、極めて大きな変形が可能であるため、確実に防水性を得ることができる。特に、波付き管13を接続現場で切断した際であって、切断面に大きな凹凸がある場合であっても、パッキン5が凹凸に追従可能であるため、高い防水性を確保することができる。 As described above, according to the pipe joint 1 according to the first embodiment, the corrugated pipes 13 can be easily connected to each other while ensuring waterproofness. Moreover, since the packing 5 has water expandability and can be deformed extremely greatly, it is possible to reliably obtain waterproofness. In particular, even when the corrugated tube 13 is cut at the connection site and there is a large unevenness on the cut surface, the packing 5 can follow the unevenness, and thus high waterproofness can be ensured. .
パッキン5は突き当て部23に設けられ、波付き管13は、波付き管13の端部でパッキン5と接触し、パッキン5が押し付けられて変形する。このため、波付き管13の外周の凹凸形状によらず確実に防水性を得ることができる。さらに、波付き管13の外形が変形し、波付き管13の真円度が悪くなった場合であっても確実に防水することができる。 The packing 5 is provided at the abutting portion 23, and the corrugated tube 13 comes into contact with the packing 5 at the end of the corrugated tube 13, and the packing 5 is pressed and deformed. For this reason, waterproofness can be reliably obtained irrespective of the uneven shape of the outer periphery of the corrugated tube 13. Furthermore, even when the outer shape of the corrugated tube 13 is deformed and the roundness of the corrugated tube 13 is deteriorated, it can be reliably waterproofed.
特に、特許文献1や特許文献2のように、波付き管13の外周と本体3の内周面との間に止水部材等が設けられないため、波付き管13の挿入の際に止水部材等により波付き管13の挿入性に影響がなく、容易に管継手1に波付き管13を挿入することができる。また、波付き管13の挿入時に、止水部材が本体3内周面に対して摺動して、止水部材がめくれ上がったり、破損したりすることがない。 In particular, unlike Patent Document 1 and Patent Document 2, since a water stop member or the like is not provided between the outer periphery of the corrugated tube 13 and the inner peripheral surface of the main body 3, the corrugated tube 13 is stopped when inserted. The insertion property of the corrugated pipe 13 is not affected by the water member or the like, and the corrugated pipe 13 can be easily inserted into the pipe joint 1. Further, when the corrugated tube 13 is inserted, the water stop member does not slide with respect to the inner peripheral surface of the main body 3, and the water stop member is not turned up or damaged.
また、管継手1には、複数の保持爪15が設けられ、波付き管13を挿入する際には、ワンタッチで挿入が可能であり、波付き管13は、管継手1へ挿入後には確実に管継手1に接合される。したがって、都度パッキン等を波付き管13へ取り付けることなく、極めて容易に一対の波付き管13同士を接合することができる。 Further, the pipe joint 1 is provided with a plurality of holding claws 15, and when the corrugated pipe 13 is inserted, the corrugated pipe 13 can be inserted with one touch. To the pipe joint 1. Therefore, the pair of corrugated tubes 13 can be joined very easily without attaching packing or the like to the corrugated tube 13 each time.
次に、第2の実施の形態にかかる管継手30について説明する。以下の実施の形態において、図1〜図4に示す管継手1と同一の機能を果たす構成要素には、図1〜図4と同一番号を付し、重複した説明を避ける。第2の実施の形態にかかる管継手30は管継手1とほぼ同様の構成であるが、次の点で異なる。すなわち、管継手30は管継手1に対して、一方の端部に雄ねじ部31およびフランジ33が設けられる点で異なる。 Next, the pipe joint 30 according to the second embodiment will be described. In the following embodiment, the same number as FIG. 1-4 is attached | subjected to the component which performs the same function as the pipe joint 1 shown in FIGS. 1-4, and the overlapping description is avoided. Although the pipe joint 30 concerning 2nd Embodiment is the structure substantially the same as the pipe joint 1, it differs by the following point. That is, the pipe joint 30 differs from the pipe joint 1 in that a male thread part 31 and a flange 33 are provided at one end.
図5は、管継手30の分解斜視図であり、図6は、管継手30の組み立て斜視図である。管継手30は、主に、本体3a、パッキン5、チャックリング7、締め付け部9、ナット35等から構成される。 FIG. 5 is an exploded perspective view of the pipe joint 30, and FIG. 6 is an assembled perspective view of the pipe joint 30. The pipe joint 30 mainly includes a main body 3a, a packing 5, a chuck ring 7, a tightening portion 9, a nut 35, and the like.
本体3aは筒状部材であり、一方の端部に、締め付け部9と接合可能な雄ねじ部11を有する。本体3aの他方の端部近傍には、外周方向に張り出したフランジ33が全周にわたって設けられる。本体3aの端部は、雄ねじ部31が設けられる。雄ねじ部31は、ナット35と螺合可能である。 The main body 3a is a cylindrical member, and has a male screw portion 11 that can be joined to the tightening portion 9 at one end portion. In the vicinity of the other end of the main body 3a, a flange 33 projecting in the outer circumferential direction is provided over the entire circumference. A male screw portion 31 is provided at the end of the main body 3a. The male screw portion 31 can be screwed with the nut 35.
キャップ37は、雄ねじ部31の内部に挿入可能であり、雄ねじ部31の内部に、水分や誇り等が浸入することを防ぐ。 The cap 37 can be inserted into the male screw portion 31 and prevents moisture, pride, and the like from entering the male screw portion 31.
図6に示すように、波付き管13は、締め付け部9およびチャックリング7へ挿入される。また、他方の雄ねじ部31は、配線ボックスやスイッチボックスなどの周辺部材の壁体39に挿入され、壁体39の反対側よりナット35で固定される。したがって、波付き管13が壁体39に接続される。 As shown in FIG. 6, the corrugated tube 13 is inserted into the tightening portion 9 and the chuck ring 7. The other male screw portion 31 is inserted into a wall body 39 of a peripheral member such as a wiring box or a switch box, and is fixed by a nut 35 from the opposite side of the wall body 39. Therefore, the corrugated tube 13 is connected to the wall body 39.
図7は、組み立てられた状態の管継手30の断面図である。本体3aのフランジ33近傍の内面には、突き当て部23が設けられる。突き当て部23の締め付け部9側には、パッキン5が設けられる。 FIG. 7 is a cross-sectional view of the pipe joint 30 in an assembled state. An abutting portion 23 is provided on the inner surface of the main body 3a near the flange 33. The packing 5 is provided on the tightening portion 9 side of the abutting portion 23.
壁体39には、あらかじめ雄ねじ部31が挿入可能な孔が設けられる。孔の径は、フランジ33よりも小さいため、管継手30は、壁体39とフランジ33で接触する。壁体39の反対面側からは、ナット35が雄ねじ部31と接合される。したがって、管継手30は、壁体39にナット35及びフランジ33で挟み込まれて固定される。雄ねじ部31の内部には、キャップ37が設けられる。キャップ37は、管継手30に電線等が挿入される際には撤去される。 The wall 39 is provided with a hole into which the male screw portion 31 can be inserted in advance. Since the diameter of the hole is smaller than that of the flange 33, the pipe joint 30 contacts the wall body 39 and the flange 33. A nut 35 is joined to the male screw portion 31 from the opposite surface side of the wall body 39. Therefore, the pipe joint 30 is sandwiched and fixed to the wall body 39 by the nut 35 and the flange 33. A cap 37 is provided inside the male screw portion 31. The cap 37 is removed when an electric wire or the like is inserted into the pipe joint 30.
なお、管継手30に挿入される波付き管13の内径よりも、雄ねじ部31の内径が大きければ、内部に電線等を挿入する際に電線等が雄ねじ部31内部に引っ掛かることがないため望ましい。また、壁体39とフランジ33との間に、パッキン等の止水部材を設ければ、より確実に防水性を確保することができる。 In addition, it is desirable that the inner diameter of the male screw portion 31 is larger than the inner diameter of the corrugated tube 13 inserted into the pipe joint 30 because the electric wire or the like is not caught inside the male screw portion 31 when the electric wire or the like is inserted therein. . Further, if a water-stopping member such as packing is provided between the wall body 39 and the flange 33, the waterproof property can be ensured more reliably.
図8は、管継手30に波付き管13を挿入した状態を示す図である。波付き管13が完全に管継手30に挿入されると、波付き管13の端部でパッキン5が押しつぶされる。この際、波付き管13は、保持爪15によって保持される。 FIG. 8 is a view showing a state where the corrugated pipe 13 is inserted into the pipe joint 30. When the corrugated pipe 13 is completely inserted into the pipe joint 30, the packing 5 is crushed at the end of the corrugated pipe 13. At this time, the corrugated tube 13 is held by the holding claws 15.
第2の実施の形態にかかる管継手30によれば、第1の実施の形態にかかる管継手1と同様の効果を得ることができる。また、波付き管13の防水性を確保しつつ、容易に、周辺部材である配線ボックスやスイッチボックス等へ接続することができる。 According to the pipe joint 30 concerning 2nd Embodiment, the effect similar to the pipe joint 1 concerning 1st Embodiment can be acquired. In addition, the corrugated tube 13 can be easily connected to a peripheral box such as a wiring box or a switch box while ensuring the waterproof property of the corrugated tube 13.
本願発明にかかる管継手1と、従来の管継手40、50との防水性能を比較した。図9は、従来の管継手40を示し、図10は従来の管継手50を示す図である。 The waterproof performance of the pipe joint 1 according to the present invention and the conventional pipe joints 40 and 50 were compared. FIG. 9 shows a conventional pipe joint 40, and FIG. 10 shows a conventional pipe joint 50.
管継手40は、鋼管等の金属管49a、49bを接続する管継手である。管継手40内には、内径が縮径された突き当て部43が設けられる。突き当て部43の両側の内周面には、溝45a、45bが周方向に設けられる。溝45a、45bにはそれぞれパッキン41a、41bが設けられる。パッキン41a、41bは、T字状断面を有し、管継手40内面に一部が突出している。 The pipe joint 40 is a pipe joint that connects metal pipes 49a and 49b such as steel pipes. In the pipe joint 40, an abutting portion 43 having an inner diameter reduced is provided. Grooves 45 a and 45 b are provided in the circumferential direction on the inner peripheral surfaces on both sides of the abutting portion 43. The grooves 45a and 45b are provided with packings 41a and 41b, respectively. The packings 41a and 41b have a T-shaped cross section, and a part protrudes from the inner surface of the pipe joint 40.
管継手40の両側より金属管49a、49bを挿入し、それぞれ突き当て部43まで挿入すると、金属管49a、49bの外周面はパッキン41a、41bと接触して防水される。金属管49a、49bはボルト47によって固定され、金属管49a、49bが管継手40に固定される。 When the metal pipes 49a and 49b are inserted from both sides of the pipe joint 40 and inserted into the abutting portions 43, the outer peripheral surfaces of the metal pipes 49a and 49b come into contact with the packings 41a and 41b to be waterproofed. The metal tubes 49 a and 49 b are fixed by bolts 47, and the metal tubes 49 a and 49 b are fixed to the pipe joint 40.
一方、管継手50は、波付き管57a、57b同士を接続する管継手である。管継手50内には、内径が縮径された突き当て部53が設けられる。挿入される波付き管57a、57bの端部近傍には、あらかじめOリング51a、51bが設けられる。 On the other hand, the pipe joint 50 is a pipe joint that connects the corrugated pipes 57a and 57b. In the pipe joint 50, an abutting portion 53 having a reduced inner diameter is provided. O-rings 51a and 51b are provided in advance near the ends of the corrugated tubes 57a and 57b to be inserted.
管継手50の両側より波付き管57a、57bを挿入し、それぞれ突き当て部53まで挿入すると、波付き管57a、57bの外周面はOリング51a、51bによって防水される。波付き管57a、57bは、図示を省略した抑え部材を締め付け穴55でボルト等により締め付けることで固定され、波付き管57a、57bが管継手40に固定される。 When the corrugated pipes 57a and 57b are inserted from both sides of the pipe joint 50 and inserted into the abutment portion 53, the outer peripheral surfaces of the corrugated pipes 57a and 57b are waterproofed by O-rings 51a and 51b. The corrugated tubes 57 a and 57 b are fixed by tightening a not-shown holding member with a bolt or the like in the tightening hole 55, and the corrugated tubes 57 a and 57 b are fixed to the pipe joint 40.
次に、防水試験方法について説明する。防水試験は、JIS C0920:2003の「電気機械器具の外郭による保護等級」に準じて行った。 Next, a waterproof test method will be described. The waterproof test was conducted in accordance with JIS C0920: 2003 “Protection class by the outer shell of an electric machine”.
JIS C0920:2003により規定される電気機械器具の外郭による保護等級(以下単に「IPコード」と称する)は、防水性能を示す試験として、IPX0〜IPX8まで規定されている。たとえば、IPX5(噴流試験)は、試験体の全周に対して、ノズル径6.3mmの放水ノズルを用いて、距離2.5〜3mの位置から毎分12.5Lの水を放水し、外郭の表面積1m3当たり1分(最低3分)後の水の浸入を確認するものである。 The protection grade (hereinafter simply referred to as “IP code”) defined by JIS C0920: 2003 is defined as IPX0 to IPX8 as a test indicating waterproof performance. For example, IPX5 (jet test) uses a water discharge nozzle with a nozzle diameter of 6.3 mm to discharge 12.5 L of water per minute from a distance of 2.5 to 3 m, The infiltration of water after 1 minute (minimum 3 minutes) per 1 m 3 of the surface area of the outer shell is confirmed.
また、同様にIPX6(暴噴流試験)は、試験体の全周に対して、ノズル径12.5mmの放水ノズルを用いて、距離2.5〜3mの位置から毎分100Lの水を放水し、外郭の表面積1m3当たり1分(最低3分)後の水の浸入を確認するものである。 Similarly, IPX6 (turbulent jet test) discharges 100 L of water per minute from a distance of 2.5 to 3 m using a water discharge nozzle with a nozzle diameter of 12.5 mm over the entire circumference of the test body. The infiltration of water after 1 minute (minimum 3 minutes) per 1 m 3 of the surface area of the outer shell is confirmed.
IPコードは数値が大きいほど厳しい試験であるため、より数値の大きなIPコードを有する管継手(より数値の大きなIPX試験を合格した管継手)がより高い防水性を有するといえる。今回は、JIS C0920:2003で規定されるIPX5〜7の試験を各管継手において実施した。 Since the IP code is a more severe test as the numerical value is larger, it can be said that a pipe joint having a larger IP code (a pipe joint that has passed the larger IPX test) has higher waterproofness. This time, tests of IPX5-7 defined in JIS C0920: 2003 were carried out in each pipe joint.
図11は、一例としてIPX7(一時的潜水試験)に相当する防水試験装置60を示す図である。防水試験装置60は、水槽65、錘板67、水71等から構成される。試験方法は以下のとおりである。 FIG. 11 is a diagram showing a waterproof test apparatus 60 corresponding to IPX7 (temporary diving test) as an example. The waterproof test device 60 includes a water tank 65, a weight plate 67, water 71, and the like. The test method is as follows.
まず、水槽65の内部に錘板67を設置する。錘板67にはあらかじめ針金69が設置される。試験体(管継手1、40、50)を針金69で錘板67に水に浮かびあがらないように固定する。試験体61に接続された管体63a、63b(波付き管13a、13b、金属管49a、49b、波付き管57a、57b)を水槽65の上方に伸ばし、管体63a、63bの端部を水槽65から出す。この状態で、水槽65に深さBが1mとなるように水71を投入し、30分間の防水試験を行った。試験後に試験体61を取り出し、内部への水の浸入を確認した。各試験結果は表1に示す。 First, the weight plate 67 is installed inside the water tank 65. A wire 69 is previously installed on the weight plate 67. The test body (pipe joints 1, 40, 50) is fixed to the weight plate 67 with a wire 69 so as not to float on water. The pipe bodies 63a and 63b (the corrugated pipes 13a and 13b, the metal pipes 49a and 49b, the corrugated pipes 57a and 57b) connected to the test body 61 are extended above the water tank 65, and the ends of the pipe bodies 63a and 63b are extended. Remove from tank 65. In this state, water 71 was poured into the water tank 65 so that the depth B would be 1 m, and a 30-minute waterproof test was performed. After the test, the test body 61 was taken out and water penetration into the inside was confirmed. The test results are shown in Table 1.
本発明にかかる管継手1は、IPX7試験においても水の侵入がなく、極めて高い防水性能であることがわかる。 It can be seen that the pipe joint 1 according to the present invention does not intrude water even in the IPX7 test and has extremely high waterproof performance.
一方、管継手40は、IPX7試験において水の侵入が確認された。これは、金属管49a、49bの挿入時に、パッキン41a、41bと金属管49a、49bとの摺動によって、パッキン41a、41bが完全に金属管49a、49bへ密着されず、または、金属管49a、49bの固定時に、金属管49a、49bが管継手40の中心からずれてしまい、パッキン41a、41bの密着性が不均一となったため、防水性能が落ちたものと考えられる。 On the other hand, as for the pipe joint 40, the penetration | invasion of water was confirmed in the IPX7 test. This is because the packing 41a, 41b is not completely in close contact with the metal tubes 49a, 49b due to sliding between the packings 41a, 41b and the metal tubes 49a, 49b when the metal tubes 49a, 49b are inserted, or the metal tubes 49a , 49b, the metal tubes 49a, 49b are displaced from the center of the pipe joint 40, and the adhesiveness of the packings 41a, 41b becomes non-uniform.
また、管継手50は、IPX6試験においても水の侵入が確認された。これは、波付き管57a、57bの挿入時に、Oリング51a、51bがずれてしまい、Oリング51a、51bと波付き管57a、57bとの密着性が悪くなったか、または、波付き管57a、57bの外形の変形によって、Oリング51a、51bと波付き管57a、57bとの密着性が不均一になったことが原因と考えられる。 The pipe joint 50 was also confirmed to have water intrusion in the IPX6 test. This is because when the corrugated tubes 57a and 57b are inserted, the O-rings 51a and 51b are displaced, and the adhesion between the O-rings 51a and 51b and the corrugated tubes 57a and 57b is deteriorated, or the corrugated tube 57a. , 57b due to deformation of the outer shape of the O-rings 51a, 51b and the corrugated tubes 57a, 57b.
本発明による管継手1は、管体が波付き管であっても、確実に防水することができ、極めて高い防水性を有することがわかる。 It can be seen that the pipe joint 1 according to the present invention can be reliably waterproofed even if the pipe body is a corrugated pipe, and has extremely high waterproofness.
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 mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.
例えば、管継手1は、保持爪15に代えてボルト等によれば、金属管等の接続にも使用することができる。 For example, the pipe joint 1 can be used for connecting a metal pipe or the like according to a bolt or the like instead of the holding claw 15.
1、30、40、50………管継手
3、3a………本体
5………パッキン
7………チャックリング
9………締め付け部
11………雄ねじ部
12………雌ねじ部
13………波付き管
15………保持爪
17………ギャップ
19………リブ
21………突起
23………突き当て部
25………谷部
31………雄ねじ部
33………フランジ
35………ナット
37………キャップ
39………壁体
41a、41b………パッキン
43………突き当て部
45a、45b………溝
47………ボルト
49a、49b………金属管
51a、51b………Oリング
53………突き当て部
55………締め付け部
57a、57b………波付き管
60………防水試験装置
61………試験体
63a、63b………管体
65………水槽
67………錘板
69………針金
71………水
1, 30, 40, 50 ............ Fitting 3, 3 a ............ Main body 5 ............ Packing 7 ............ Chuck ring 9 ............ Tightening part 11 ............ Male thread part 12 ............ ...... Wavy tube 15 ......... Holding claw 17 ......... Gap 19 ......... Rib 21 ......... Protrusion 23 ......... Abutting part 25 ......... Valley part 31 ......... Male thread part 33 ......... Flange 35 ......... Nut 37 ......... Cap 39 ......... Wall bodies 41a, 41b ......... Packing 43 ......... Abutting portions 45a, 45b ......... Groove 47 ......... Bolts 49a, 49b ......... Metal tubes 51a, 51b ......... O-ring 53 ......... Tightening portion 55 ......... Clamping portion 57a, 57b ...... Wavy tube 60 ......... Waterproof test device 61 ......... Test bodies 63a, 63b ......... Tube Body 65 ......... Water tank 67 ......... Weight plate 69 ......... Wire 71 ......... Water
Claims (4)
前記本体部の内部に設けられ、内径が縮径された突き当て部と、
前記突き当て部に設けられた水膨張性の止水部材と、
前記本体部に取り付けられ、独立波を有する波付き管を保持する保持部と、
を具備し、
前記止水部材は、リング状のウレタンフォームあるいはゴムパッキンにウレタンフォームあるいは吸水性不織布を重ねてリング状に構成したものであり、
前記保持部は、
前記保持部の端部近傍の内周に沿って、前記波付き管の谷部を保持する複数の爪部と、前記爪部を内周方向に締め付ける締め付け部と、を有し、
前記保持部の一方の端部には、円筒軸方向に複数の切れ目が設けられて、先端部の内面に前記爪部が設けられ、
前記締め付け部を前記本体部へ完全に締め込んだ状態で前記保持部の先端側から前記波付き管を挿入する際には、前記爪部は、前記保持部の内面に突出するとともに前記波付き管の挿入に抵抗となり難いようにテーパ形状を有し、前記波付き管を抜き去る際には前記波付き管に引っ掛かるような爪形状であり、
前記締め付け部と前記爪部の外周面との間の一部にはギャップが形成され、前記締め付け部が前記本体部へ完全に締めこまれた状態では、前記爪部の外周は、前記締め付け部の先端内面によって押さえられて、前記波付き管を挿入可能であるとともに前記波付管を保持することが可能であり、前記締め付け部が緩められると、前記爪部の外周には前記ギャップが位置し、前記爪部が外周方向に変形可能となって挿入された前記波付き管の取り外し状態となることを特徴とする管継手。 A cylindrical body,
An abutting portion provided inside the main body and having an inner diameter reduced;
A water-swellable water-stopping member provided in the abutting portion;
A holding part that is attached to the main body part and holds a corrugated tube having an independent wave;
Comprising
The water-stop member is a ring-shaped urethane foam or rubber packing that is formed in a ring shape by overlapping urethane foam or a water-absorbing nonwoven fabric,
The holding part is
Along the inner periphery in the vicinity of the end of the holding portion, there are a plurality of claw portions that hold the trough portion of the corrugated tube, and a tightening portion that tightens the claw portion in the inner circumferential direction.
A plurality of cuts are provided in the cylindrical axial direction at one end of the holding part, and the claw part is provided on the inner surface of the tip part,
When the corrugated tube is inserted from the front end side of the holding portion in a state where the tightening portion is completely tightened to the main body portion, the claw portion protrudes from the inner surface of the holding portion and the corrugated portion It has a taper shape so that it is difficult to become resistance to insertion of the tube, and when the waved tube is removed, it is a claw shape that is caught by the waved tube,
A gap is formed in a part between the tightening portion and the outer peripheral surface of the claw portion, and when the tightening portion is completely tightened to the main body portion, the outer periphery of the claw portion is the tightening portion. It is possible to insert the corrugated tube and hold the corrugated tube, and when the tightening portion is loosened, the gap is positioned on the outer periphery of the claw portion. And the said nail | claw part will be in the removal state of the said corrugated pipe | tube inserted so that it can deform | transform in the outer peripheral direction, The pipe joint characterized by the above-mentioned.
前記締め付け部を前記本体部へ完全に締め込んだ状態で、前記爪部の先端が前記保持部の内周側に波付き管の外周側山部の径よりも小さくなる程度に突出し、前記波付き管が挿入される際には、前記爪部の先端の突出を前記波付き管の外周側山部の径よりも小さくなる程度に保つことが可能であり、
前記波付き管の端部が前記突き当て部に設けられた前記水膨張性の止水部材に押し付けられ、
前記波付き管によって前記水膨張性の止水部材が押しつぶされた状態で、前記波付き管と前記管継手とが接続されることを特徴とする管接続構造。 A corrugated pipe is inserted into the pipe joint according to claim 1,
With the tightening portion fully tightened to the main body portion, the tip of the claw portion protrudes to the inner peripheral side of the holding portion so as to be smaller than the diameter of the outer peripheral side peak portion of the corrugated tube, When the attached tube is inserted, it is possible to keep the protrusion at the tip of the claw portion to be smaller than the diameter of the outer peripheral ridge of the corrugated tube,
The end portion of the corrugated tube is pressed against the water-swellable water stop member provided at the abutting portion,
The pipe connection structure, wherein the corrugated pipe and the pipe joint are connected in a state where the water-expandable water stop member is crushed by the corrugated pipe.
前記締め付け部の内部にはリブが内周方向に設けられ、
前記締め付け部を前記本体部へ完全に締め込んだ状態で、前記リブは、前記突起と噛み合って、前記突起が前記本体部の方向に前記締め付け部によって押さえつけられることを特徴とする請求項2に記載の管接続構造。 On the other end of the holding portion on which the claw portion is provided, a protrusion is provided on the outer periphery.
A rib is provided inside the tightening portion in the inner circumferential direction,
The rib is engaged with the protrusion in a state where the tightening portion is completely tightened to the main body, and the protrusion is pressed by the tightening portion in the direction of the main body. The pipe connection structure described.
前記締め付け部を前記本体部へ完全に締め込み、挿入対象の波付き管の外周側山部の径よりも小さくなる程度に、前記爪部の先端を前記保持部の内周側に突出させた状態で、前記波付き管を前記保持部に挿入し、
前記波付き管を完全に挿入した状態で、前記爪部によって前記波付き管を保持することを特徴とする管接続方法。 A pipe connection method using the pipe joint according to claim 1,
The fastening part is completely fastened to the main body part, and the tip of the claw part is protruded to the inner peripheral side of the holding part so as to be smaller than the diameter of the outer peripheral side peak part of the corrugated tube to be inserted. In the state, insert the corrugated tube into the holding part,
A tube connection method, wherein the corrugated tube is held by the claw portion in a state where the corrugated tube is completely inserted.
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JP2020018141A (en) * | 2018-07-27 | 2020-01-30 | 古河電気工業株式会社 | Flexible conduit tube, connection method of flexible conduit tube, and water cut-off member |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63149493A (en) * | 1986-12-14 | 1988-06-22 | 松下電工株式会社 | Joint for corrugated flexible pipe |
JPH09287680A (en) * | 1996-02-23 | 1997-11-04 | Furukawa Electric Co Ltd:The | Coupling for corrugated flexible pipe |
JP2599480Y2 (en) * | 1993-02-26 | 1999-09-06 | 古河電気工業株式会社 | Corrugated pipe fittings |
JP2003083488A (en) * | 2001-09-10 | 2003-03-19 | Mirai Ind Co Ltd | Corrugated tube, coupler of the same and protection device for inserted body equipped with corrugated tube and coupler |
-
2012
- 2012-04-09 JP JP2012088146A patent/JP5379879B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63149493A (en) * | 1986-12-14 | 1988-06-22 | 松下電工株式会社 | Joint for corrugated flexible pipe |
JP2599480Y2 (en) * | 1993-02-26 | 1999-09-06 | 古河電気工業株式会社 | Corrugated pipe fittings |
JPH09287680A (en) * | 1996-02-23 | 1997-11-04 | Furukawa Electric Co Ltd:The | Coupling for corrugated flexible pipe |
JP2003083488A (en) * | 2001-09-10 | 2003-03-19 | Mirai Ind Co Ltd | Corrugated tube, coupler of the same and protection device for inserted body equipped with corrugated tube and coupler |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020018141A (en) * | 2018-07-27 | 2020-01-30 | 古河電気工業株式会社 | Flexible conduit tube, connection method of flexible conduit tube, and water cut-off member |
JP7079168B2 (en) | 2018-07-27 | 2022-06-01 | 古河電気工業株式会社 | Flexible conduit, connection method of flexible conduit, and water stop member |
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