JP2009144760A - Flexible pipe coupling - Google Patents

Flexible pipe coupling Download PDF

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JP2009144760A
JP2009144760A JP2007320504A JP2007320504A JP2009144760A JP 2009144760 A JP2009144760 A JP 2009144760A JP 2007320504 A JP2007320504 A JP 2007320504A JP 2007320504 A JP2007320504 A JP 2007320504A JP 2009144760 A JP2009144760 A JP 2009144760A
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reinforcing member
flexible pipe
pipe joint
pipe body
spiral
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JP5147377B2 (en
JP2009144760A5 (en
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Shoichi Hasegawa
正一 長谷川
Hiroshi Hashizume
博 橋爪
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Achilles Corp
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Achilles Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible pipe coupling constructible by easily bending, arranging a spiral reinforcing member, capable of preventing deformation after molding even when using a material having a hardness difference, and easy in construction by using repulsive force. <P>SOLUTION: This flexible pipe coupling 10 is composed of a pipe body 11 having a connecting part 11a in both end parts and the reinforcing member 12 spirally arranged on the outer periphery of this pipe body 11. The pipe body 11 and the reinforcing member 12 are formed of a synthetic resin different in hardness. A surface of the pipe body 11 between respective spirals of the reinforcing member 12 is formed as inclined faces 11c and 11c lowering in a central part 11b, and both end parts are formed in a spiral shape having a ring part 12a connected in an annular shape, and an interval D between the spirals 12b is set to 10-25 mm. Construction is facilitated by easily bending by the inclined faces 11c and 11c of the pipe body 11. Rigidity is enhanced by a ring part 12a of both end parts of the spirals. Deformation after molding by a hardness difference is prevented, and the repulsive force is generated in the extending direction even in push-contracted, and installation in a pipe is facilitated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は住宅用の排水管などの接続に使用される可撓性管継手に関し、簡単に曲げて施工できるとともに、成形時の変形を防止できるようにしたものである。   The present invention relates to a flexible pipe joint used for connecting a drain pipe for a house and the like, which can be easily bent and constructed and can prevent deformation at the time of molding.

マンションなどの集合住宅や一個建て住宅などの住宅用の雑排水用の配管の継手として可撓性管継手が用いられており、配管同士の芯ずれの吸収や曲がり部分の接続、あるいは地震時の破損防止や免震のために用いられている。   Flexible pipe fittings are used as joints for miscellaneous drainage pipes for apartment houses such as apartment buildings and single-family houses, and they absorb misalignment between pipes, connect bent parts, or are in the event of an earthquake. Used for damage prevention and seismic isolation.

従来、可撓性管継手としては、蛇腹構造とされ、管の内外壁面を凹凸状にすることで、可撓性を持たせるようにしたものが一般的であり、内壁面の凹凸により内径がその分小さくなるとともに、排水の流量が少ない場合に排水や固形物等が凹部に溜まりやすく、悪臭などが発生し易いものであった。   Conventionally, flexible pipe joints have a bellows structure, and are generally made flexible by making the inner and outer wall surfaces of the pipe uneven, and the inner diameter is reduced by the unevenness of the inner wall surface. In addition to being reduced by that amount, when the flow rate of drainage is small, drainage, solids, etc. tend to accumulate in the recesses, and bad odors are likely to occur.

そこで、内壁面を平滑にして排水の滞留などを防止できる可撓管継手が種々提案されており、例えば、図4に示すように、低弾性樹脂からなる管状体1に、ノルボルネン系樹脂からなる線状補強部材2を管状体1に対して螺旋状に設けて一体化して構成した可撓性管状体も提案されている(特許文献1参照)。   Therefore, various flexible pipe joints have been proposed that can smooth the inner wall surface and prevent stagnation of drainage. For example, as shown in FIG. 4, the tubular body 1 made of a low elastic resin is made of a norbornene resin. There has also been proposed a flexible tubular body in which the linear reinforcing member 2 is provided spirally with respect to the tubular body 1 (see Patent Document 1).

また、 内壁面を平滑にした軟質筒状本体と、この筒状本体の外周面に硬質リングを軸方向に離間して一体に形成した可撓管継手が提案されている(特許文献2参照)。
特開2001−241574号公報 特開2005−172186号公報
In addition, a soft cylindrical main body having a smooth inner wall surface and a flexible pipe joint in which a hard ring is integrally formed on the outer peripheral surface of the cylindrical main body while being separated in the axial direction have been proposed (see Patent Document 2). .
JP 2001-241574 A JP 2005-172186 A

ところが、このような可撓管継手では、90度の曲がり部分に使用する場合に、螺旋状の補強部材間や硬質リング間の管状体が曲がり部分の内側では押し縮められる一方、曲がり部分の外側では引き伸ばされることになるが、管状体が均一な肉厚のため曲げ難く、施工がやり難いという問題がある。   However, in such a flexible pipe joint, when used in a 90 ° bent portion, the tubular body between the spiral reinforcing members and between the hard rings is compressed inside the bent portion, while the outside of the bent portion. However, since the tubular body has a uniform thickness, it is difficult to bend and the construction is difficult to perform.

また、軟質の筒状本体の外周に螺旋状や硬質のリングの補強部材を一体に成形すると、樹脂などの材料の硬度差によって成形後に変形が生じ易く、特に硬質リングを平行に設ける場合には、一本に繋がっている螺旋状の補強部材に比べてリング同士が独立し連結されていないことから一層変形が生じ易いという問題がある。   In addition, when a reinforcing member of a spiral or hard ring is integrally formed on the outer periphery of a soft cylindrical body, deformation is likely to occur after molding due to the difference in hardness of materials such as resin, especially when a hard ring is provided in parallel. There is a problem that deformation is more likely to occur because the rings are independent and not connected to each other as compared to the spiral reinforcing member connected to one.

さらに、硬質リングを平行に配置した可撓管継手では、配管同士を接続する場合、一旦押し縮めて配管の間に入れた後、両端部の連結部をそれぞれ配管に挿入するが、引き伸ばし方向には軟質の筒状本体の弾性による反発力が作用するだけであり、作業者が引き伸ばしながら取り付けなければならないという問題もある。   Furthermore, in the case of flexible pipe joints in which hard rings are arranged in parallel, when connecting pipes, after pressing and shrinking and inserting between the pipes, the connecting parts at both ends are respectively inserted into the pipes. There is also a problem that an operator must attach it while stretching it, because only the repulsive force due to the elasticity of the soft cylindrical body acts.

この発明は、かかる従来技術の課題に鑑みてなされたもので、簡単に曲げて施工することができ、螺旋状の補強部材を設けるとともに、硬度差のある材料を用いても成形後の変形を防止でき、反発力を利用することで施工も容易な可撓性管継手を提供しようとするものである。   The present invention has been made in view of the problems of the prior art, and can be easily bent and installed. In addition to providing a helical reinforcing member, deformation after molding can be achieved even when materials having a hardness difference are used. An object of the present invention is to provide a flexible pipe joint that can be prevented and can be easily constructed by utilizing the repulsive force.

上記課題に鑑み、可撓性管継手について鋭意検討を重ねた結果、管本体と螺旋状の補強部材との硬度差、螺旋の間隔および管本体の縦断面形状などによって、曲げ易く、螺旋状の補強部材であっても硬度差による成形後の変形も防止できる構造があることを見出し本願発明を完成したもので、その具体的な構成は、以下の通りである。   In view of the above problems, as a result of intensive studies on flexible pipe joints, it is easy to bend due to the difference in hardness between the tube body and the helical reinforcing member, the space between the spirals, the longitudinal cross-sectional shape of the tube body, and the like. The present invention has been completed by finding that there is a structure that can prevent deformation after molding due to a difference in hardness even if it is a reinforcing member, and its specific configuration is as follows.

すなわち、上記従来技術の課題を解決するためこの発明の請求項1記載の可撓性管継手は、 両端部に連結部を有して内外面がほぼ平滑な管本体と、この管本体の外周に螺旋状に設けられる補強部材とからなる可撓性管継手であって、
前記管本体と前記補強部材とを硬度が異なる合成樹脂で構成し、
前記管本体の硬度を70〜30(JISK6253タイプAデュロメータ)とする一方、前記補強部材の各螺旋の間の当該管本体の表面を、中央部が低くなる傾斜面に形成するとともに、当該傾斜面の基端肉厚を1〜3mmとし、
前記補強部材の硬度を100〜80とするとともに、前記補強部材の両端部を環状に連結したリング部を有する螺旋状に形成し、当該螺旋の間隔を10〜25mmとしたことを特徴とするものである。
この可撓性管継手によれば、管本体の硬度および肉厚をこれらの値とするとともに、管本体の螺旋の間の表面を中央部が低い傾斜面とし、補強部材の硬度および螺旋の間隔をこれらの値とすることで、曲がり部分の内外の変形を促して曲げ易くして施工を容易とし、しかも螺旋の両端部を環状のリング部とすることで、補強部材の剛性を高めて硬度差による成形後の変形を防止できるようにするとともに、押し縮めても引き伸ばし方向に補強部材による反発力が生じるようにし、配管への取付を容易とし施工性を向上するようにしている。
That is, in order to solve the above-described problems of the prior art, a flexible pipe joint according to claim 1 of the present invention includes a pipe body having connecting portions at both ends and having substantially smooth inner and outer surfaces, A flexible pipe joint formed of a reinforcing member provided in a spiral shape,
The pipe body and the reinforcing member are made of synthetic resins having different hardnesses,
While the hardness of the pipe body is set to 70 to 30 (JISK6253 type A durometer), the surface of the pipe body between the spirals of the reinforcing member is formed into an inclined surface with a lower central portion, and the inclined surface The base end wall thickness of 1 to 3 mm,
The reinforcing member has a hardness of 100 to 80, is formed in a spiral shape having a ring portion in which both end portions of the reinforcing member are connected in an annular shape, and the space between the spirals is 10 to 25 mm. It is.
According to this flexible pipe joint, the hardness and thickness of the tube main body are set to these values, and the surface between the spirals of the tube main body is formed as an inclined surface having a low central portion, and the hardness of the reinforcing member and the space between the spirals With these values, it is easy to bend by encouraging internal and external deformation of the bent part, making it easy to construct, and by making both ends of the spiral ring rings, the rigidity of the reinforcing member is increased and the hardness is increased. In addition to preventing deformation after molding due to the difference, a repulsive force is generated by the reinforcing member in the extending direction even when the sheet is compressed, thereby facilitating attachment to the piping and improving workability.

また、この発明の請求項2記載の可撓性管継手は、請求項1記載の構成に加え、前記管本体と前記補強部材とを同一合成樹脂で構成してなることを特徴とするものである。
この可撓性管継手によれば、前記管本体と前記補強部材とを同一合成樹脂で構成することで、管本体と補強部材との接着性を高め一体化できるようにしている。
A flexible pipe joint according to a second aspect of the present invention is characterized in that, in addition to the configuration according to the first aspect, the pipe body and the reinforcing member are made of the same synthetic resin. is there.
According to this flexible pipe joint, the pipe main body and the reinforcing member are made of the same synthetic resin, so that the adhesiveness between the pipe main body and the reinforcing member can be enhanced and integrated.

さらに、この発明の請求項3記載の可撓性管継手は、請求項1または2記載の構成に加え、前記管本体を、透明樹脂または着色透明樹脂で構成したことを特徴とするものである。
この可撓性管継手によれば、前記管本体を、透明樹脂または着色透明樹脂で構成することで、施工の際の取付状態を確認できるとともに、汚れなどの視認性を向上できるようにしている。
Furthermore, the flexible pipe joint according to claim 3 of the present invention is characterized in that, in addition to the structure according to claim 1 or 2, the pipe body is made of a transparent resin or a colored transparent resin. .
According to this flexible pipe joint, the tube body is made of a transparent resin or a colored transparent resin, so that the mounting state during construction can be confirmed and the visibility of dirt and the like can be improved. .

また、この発明の請求項4記載の可撓性管継手は、請求項1〜3のいずれかに記載の構成に加え、前記補強部材の螺旋の横断面形状を、台形状としたことを特徴とするものである。
この可撓性管継手によれば、前記補強部材の螺旋の横断面形状を、台形状とすることで、曲げた状態にする場合の補強部材の先端部同士の干渉を防止するとともに、最小限の材料の使用量で必要な強度や剛性を確保できるようにしている。
Moreover, the flexible pipe joint according to claim 4 of the present invention is characterized in that, in addition to the configuration according to any one of claims 1 to 3, the cross-sectional shape of the spiral of the reinforcing member is trapezoidal. It is what.
According to this flexible pipe joint, by making the cross-sectional shape of the spiral of the reinforcing member trapezoidal, it is possible to prevent interference between the distal ends of the reinforcing member when it is bent, and at the minimum The required strength and rigidity can be secured with the amount of material used.

この発明の請求項1記載の可撓性管継手によれば、両端部に連結部を有して内外面がほぼ平滑な管本体と、この管本体の外周に螺旋状に設けられる補強部材とからなる可撓性管継手であって、前記管本体と前記補強部材とを硬度が異なる合成樹脂で構成し、前記管本体の硬度を70〜30(JISK6253タイプAデュロメータ)とする一方、前記補強部材の各螺旋の間の当該管本体の表面を、中央部が低くなる傾斜面に形成するとともに、当該傾斜面の基端肉厚を1〜3mmとし、 前記補強部材の硬度を100〜80とするとともに、前記補強部材の両端部を環状に連結したリング部を有する螺旋状に形成し、当該螺旋の間隔を10〜25mmとしたので、管本体の硬度および肉厚をこれらの値とするとともに、管本体の螺旋の間の表面を中央部が低い傾斜面とし、補強部材の硬度および螺旋の間隔をこれらの値とすることで、管本体の傾斜面による縦断面形状により、曲がり部分の内外の変形を促して曲げ易くすることができ、施工を容易にすることができる。また、螺旋の両端部を環状のリング部とすることで、補強部材の剛性を高めることで、硬度差による成形後の変形を防止することができるとともに、押し縮めても引き伸ばし方向に補強部材による反発力を生じさせることができ、配管への取付を容易とし施工性を向上することができる。   According to the flexible pipe joint of claim 1 of the present invention, a pipe body having a connecting portion at both ends and having a substantially smooth inner and outer surface, and a reinforcing member provided spirally on the outer periphery of the pipe body, The pipe main body and the reinforcing member are made of synthetic resins having different hardnesses, and the pipe main body has a hardness of 70 to 30 (JISK6253 type A durometer). The surface of the tube body between the spirals of the member is formed on an inclined surface with a lower central part, the proximal thickness of the inclined surface is 1 to 3 mm, and the hardness of the reinforcing member is 100 to 80 In addition, since the reinforcing member is formed in a spiral shape having a ring portion in which both ends of the reinforcing member are annularly connected, and the interval between the spirals is set to 10 to 25 mm, the hardness and thickness of the tube body are set to these values. The surface between the helix of the tube body By making the central part a low inclined surface and setting the hardness of the reinforcing member and the spiral interval to these values, the longitudinal cross-sectional shape of the inclined surface of the tube main body facilitates deformation inside and outside the bent portion and makes it easy to bend. It can be done easily. In addition, since both ends of the spiral are ring-shaped ring portions, the rigidity of the reinforcing member can be increased, so that deformation after molding due to a difference in hardness can be prevented, and the reinforcing member can be extended in the extending direction even when compressed. A repulsive force can be generated, and attachment to piping can be facilitated and workability can be improved.

また、この発明の請求項2記載の可撓性管継手によれば、前記管本体と前記補強部材とを同一合成樹脂で構成したので、管本体と補強部材との接着性を高めて一体化することができる。これにより、成形後の変形を一層防止できるとともに、補強部材による反発力を有効に作用させることができる。   According to the flexible pipe joint of claim 2 of the present invention, since the pipe body and the reinforcing member are made of the same synthetic resin, the adhesiveness between the pipe body and the reinforcing member is improved and integrated. can do. As a result, deformation after molding can be further prevented, and the repulsive force by the reinforcing member can be effectively applied.

さらに、この発明の請求項3記載の可撓性管継手によれば、前記管本体を、透明樹脂または着色透明樹脂で構成したので、施工の際に固定管などへの取付状態を確認することができるとともに、汚れなどの視認性を向上することができ、保守管理などを適切に行うことが可能となる。   Furthermore, according to the flexible pipe joint according to claim 3 of the present invention, since the pipe body is made of a transparent resin or a colored transparent resin, the state of attachment to a fixed pipe or the like is confirmed at the time of construction. In addition, the visibility of dirt and the like can be improved, and maintenance management and the like can be performed appropriately.

また、この発明の請求項4記載の可撓性管継手によれば、前記補強部材の螺旋の横断面形状を、台形状としたので、曲げた状態にする場合の補強部材の先端部同士の干渉を防止することができ、曲げ角度を大きくできるとともに、最小限の材料の使用量で必要な強度や剛性を確保することができる。   Moreover, according to the flexible pipe joint of claim 4 of the present invention, since the cross-sectional shape of the spiral of the reinforcing member is a trapezoidal shape, the distal ends of the reinforcing members when bent are used. Interference can be prevented, the bending angle can be increased, and necessary strength and rigidity can be secured with a minimum amount of material used.

以下、この発明の可撓性管継手の一実施の形態について、図面に基づき詳細に説明する。
図1〜図3は、この発明の可撓性管継手の一実施の形態にかかり、図1は一部分を切り欠いて示す正面図、側面図および部分拡大断面図、図2は補強部材のみの正面図、図3は90度に曲げた状態の一部分を切り欠いて示す断面図である。
Hereinafter, an embodiment of the flexible pipe joint of the present invention will be described in detail with reference to the drawings.
1 to 3 relate to one embodiment of a flexible pipe joint of the present invention, FIG. 1 is a front view, a side view and a partially enlarged sectional view showing a part cut away, and FIG. FIG. 3 is a front view, and FIG. 3 is a cross-sectional view showing a part of a state bent at 90 degrees.

この発明の可撓性管継手10は、例えば住宅用の排水管同士の継手や排水管と器具などの継手として用いられるもので、通常口径が30〜100mmの範囲の配管などに用いられる。
この可撓性管継手10は、管本体11とこれを補強する補強部材12とで構成され、管本体11の両端部には、配管Pとの連結部11aが設けられ、例えば配管Pの外側に装着してバンドで固定するように配管Pより僅かに大径に形成してある。
なお、連結部11aとしては、配管Pの外側に挿入してバンドなどで押える形式に限らず、一端部を細径のテーパ状とし、他端部を太径のテーパ状として互いを嵌合・接着する形式など他の形式であっても良い。
The flexible pipe joint 10 of the present invention is used, for example, as a joint between residential drain pipes or a joint between a drain pipe and an instrument, and is usually used for piping having a diameter of 30 to 100 mm.
The flexible pipe joint 10 is composed of a pipe body 11 and a reinforcing member 12 that reinforces the pipe body 11, and connection parts 11 a with pipes P are provided at both ends of the pipe body 11. It is formed in a slightly larger diameter than the pipe P so as to be attached to and fixed with a band.
The connecting portion 11a is not limited to the type inserted into the outside of the pipe P and pressed with a band or the like, but has one end with a small taper and the other with a large taper. Other types such as a bonding type may be used.

管本体11は、図1(c)に示すように、内面が平滑とされ、外面は螺旋状の補強部材12の螺旋間の中央部11bが低い2つの傾斜面11c,11cとされており、中央部11bの低い部分は、補強部材12の間を螺旋状に連続している。   As shown in FIG.1 (c), the pipe body 11 is made into two inclined surfaces 11c and 11c where the inner surface is smooth, and the outer surface is low in the central portion 11b between the spirals of the spiral reinforcing member 12, The lower portion of the central portion 11b is spirally continuous between the reinforcing members 12.

この管本体11は、例えば軟質塩化ビニル樹脂、オレフィン樹脂、ウレタン樹脂、エラストマー樹脂等で形成され、硬度が70〜30(JISK6253タイプAデュロメータ)としてあり、両端部の連結部11aとともに一体成形される。そして、この管本体11は、傾斜面11cの基端部である最も厚い部分の肉厚が1〜3mmとされるとともに、中央部11bは基端部に比べて0.5mm程度薄い肉厚としてある。
この管本体11の傾斜面11cの基端部の厚みが1mm未満であると、傾斜中央部11bで破れたりするなどの破損の可能性があるとともに、耐久性が劣る。一方、傾斜面11cの基端部の厚みが3mを超えて厚くなると、可撓性が低下して曲げ難くなってしまう。また、管本体11の硬度が30未満であると、変形し易く、耐圧性が不足し、補強部材12の圧力に耐えられなくなるおそれがある。一方、硬度が70を越えると、可撓性が低下し、曲げ難くなる。
The tube body 11 is made of, for example, a soft vinyl chloride resin, an olefin resin, a urethane resin, an elastomer resin or the like, has a hardness of 70 to 30 (JISK6253 type A durometer), and is integrally formed with the connecting portions 11a at both ends. . The tube body 11 has a thickness of 1 to 3 mm at the thickest portion that is the base end portion of the inclined surface 11c, and the center portion 11b has a thickness that is about 0.5 mm thinner than the base end portion. is there.
When the thickness of the base end portion of the inclined surface 11c of the tube body 11 is less than 1 mm, the tube body 11 may be broken at the inclined central portion 11b, and the durability is inferior. On the other hand, when the thickness of the base end portion of the inclined surface 11c exceeds 3 m, the flexibility is lowered and it is difficult to bend. Moreover, when the hardness of the tube body 11 is less than 30, the tube body 11 is easily deformed, the pressure resistance is insufficient, and the pressure of the reinforcing member 12 may not be able to be endured. On the other hand, when the hardness exceeds 70, flexibility is lowered and bending becomes difficult.

このように管本体11の螺旋間を管軸方向の中央部11bの外表面が低く、螺旋間の両側が高く傾斜する2つの傾斜面11c,11cとすることで、傾斜基端部の肉厚に比べて中央部11bの肉厚が薄くなっている分だけ伸縮性を大きくすることができ、これによって管本体11を曲げ易くすることができる。   In this way, the thickness of the inclined base end portion is made by providing the two inclined surfaces 11c and 11c in which the outer surface of the central portion 11b in the tube axis direction is low between the spirals of the tube body 11 and both sides between the spirals are highly inclined. Compared to the above, it is possible to increase the stretchability as much as the thickness of the central portion 11b is thin, and thereby the tube body 11 can be easily bent.

螺旋状の補強部材12は、管本体11の外周に設けられており、管本体11に比べ硬度が高い材料で形成されて可撓性管継手10が構成されている。
この管本体11の外周に設けられる補強部材12は、軟質塩化ビニル樹脂、オレフィン樹脂、ウレタン樹脂、エラストマー樹脂等で形成され、硬度が100〜80(JISK6253タイプAデュロメータ)とされるとともに、両端部を環状に連結したリング部12aを有する螺旋状に形成してある。
The spiral reinforcing member 12 is provided on the outer periphery of the tube main body 11, and is formed of a material having higher hardness than the tube main body 11 to constitute the flexible pipe joint 10.
The reinforcing member 12 provided on the outer periphery of the tube body 11 is formed of a soft vinyl chloride resin, an olefin resin, a urethane resin, an elastomer resin, or the like, and has a hardness of 100 to 80 (JISK6253 type A durometer). Are formed in a spiral shape having a ring portion 12a connected in a ring shape.

この補強部材12の両端部に環状に連結したリング部12aを形成することで、螺旋状であっても中心軸方向の剛性や中心軸に対する捩じれ方向の剛性を高めることができ、これによって硬度の異なる管本体11と補強部材12とを一体にした成形後の変形を有効に防止して設計通りの形状にすることが容易となる。   By forming ring portions 12a that are annularly connected to both ends of the reinforcing member 12, the rigidity in the central axis direction and the torsional direction rigidity with respect to the central axis can be increased even in a spiral shape. It becomes easy to effectively prevent deformation after forming the different tube main body 11 and the reinforcing member 12 integrally, and to make the shape as designed.

そして、螺旋状の補強部材12の螺旋12bの間隔Dが10〜25mmとされ、この間隔Dの部分の管本体11の壁面が外周側に露出した状態とされ、2つの傾斜面11c、11cが形成されている。   And the space | interval D of the spiral 12b of the helical reinforcement member 12 shall be 10-25 mm, and the wall surface of the pipe main body 11 of the part of this space | interval D is made into the state exposed to the outer peripheral side, and the two inclined surfaces 11c and 11c are made into the state. Is formed.

また、この補強部材12の螺旋12bの横断面形状が台形状とされて底部が広幅で頂部が狭くしてあり、これによって曲げた状態にする場合の補強部材12の先端部同士の干渉を防止するようにするとともに、最小限の材料の使用量で必要な強度や剛性を確保するようにしている。この螺旋12bの横断面形状は、例えば底部の幅が6〜10mm、頂部の幅が2〜4mmの範囲としてあり、高さとしては、3〜8mm程度が好ましい。高さが3mm未満であると強度が不足し、8mmを越えると先端部同士が干渉してしまい、曲げるのに支障をきたし好ましくない。   Further, the cross-sectional shape of the spiral 12b of the reinforcing member 12 is trapezoidal, the bottom is wide, and the top is narrow, thereby preventing interference between the distal ends of the reinforcing member 12 when bent. In addition, the necessary strength and rigidity are ensured with the minimum amount of material used. The cross-sectional shape of the spiral 12b is, for example, in the range where the width of the bottom is 6 to 10 mm and the width of the top is 2 to 4 mm, and the height is preferably about 3 to 8 mm. If the height is less than 3 mm, the strength is insufficient. If the height is more than 8 mm, the tip portions interfere with each other, which hinders bending and is not preferable.

この補強部材12では、硬度が100を越えると、もろく可撓性を確保することができなくなる一方、硬度が80未満であると、管本体11の形状を保持することができなくなるおそれがある。また、補強部材12の螺旋の間隔Dが10mm未満であると、曲げる場合に螺旋12b、12b同士が干渉するおそれがあり、螺旋の間隔Dが25mmを越えた場合には、管本体11を補強する補強機能が低下するおそれがある。   If the hardness of the reinforcing member 12 exceeds 100, the brittleness cannot be ensured, and if the hardness is less than 80, the shape of the tube body 11 may not be maintained. Further, if the spiral distance D of the reinforcing member 12 is less than 10 mm, the spirals 12b and 12b may interfere with each other when bent. If the spiral distance D exceeds 25 mm, the tube body 11 is reinforced. There is a risk that the reinforcing function to be reduced.

このように構成した可撓性管継手10は、例えば図3に示すように、直角に配置された配管P、P間に設けられ、管本体11及び補強部材12を軸方向に押し縮めるようにして、両端部の連結部11aを配管P、Pに被せるように挿入し、外周にバンドを巻き掛けて締め付けて固定することで使用する。   For example, as shown in FIG. 3, the flexible pipe joint 10 configured as described above is provided between pipes P and P arranged at right angles so as to compress and contract the pipe body 11 and the reinforcing member 12 in the axial direction. Then, the connecting portions 11a at both ends are inserted so as to cover the pipes P and P, and a band is wound around the outer periphery to be tightened and fixed.

こうして可撓性管継手10を直角の曲がり部分に取り付けた状態では、曲がり部分の内側の補強部材12の螺旋12bの間隔Dが狭くなる一方、外側の螺旋12bの間隔Dが広がるように変形するが、この可撓性管継手10では、管本体11と補強部材12とが硬度が異なる材料で成形され、管本体11が柔らかく、補強部材12が硬くしてあり、しかもその硬度が管本体で70〜30(JISK6253タイプAデュロメータ)とし、補強部材12で100〜80とするとともに、螺旋12bの間隔を10〜25mmとし、螺旋12b、12b間の管本体11を中央部11bが低い2つの傾斜面11c、11cにしてあるので、管本体11が2つの傾斜面11c,11cによって伸縮し易く、簡単に曲がった状態にすることができる。   In this state, when the flexible pipe joint 10 is attached to the right-angled bent portion, the distance D between the spirals 12b of the reinforcing member 12 inside the bent portion is narrowed while the distance D between the outer spirals 12b is widened. However, in this flexible pipe joint 10, the tube body 11 and the reinforcing member 12 are formed of materials having different hardnesses, the tube body 11 is soft, the reinforcing member 12 is hard, and the hardness is the tube body. 70 to 30 (JISK6253 type A durometer), 100 to 80 with the reinforcing member 12, the interval between the spirals 12b to 10 to 25 mm, and the tube body 11 between the spirals 12b and 12b to have two inclined lower central portions 11b Since the surfaces 11c and 11c are provided, the tube main body 11 is easily expanded and contracted by the two inclined surfaces 11c and 11c, and can be easily bent.

また、この可撓性管継手10によれば、螺旋12bの両端部を環状のリング部12aとすることで、補強部材12の剛性を高めることができ、管継手を取り付けの際に押し縮めても引き伸ばし方向に管本体11の弾性による反発力とともに、補強部材12による反発力が生じ、これらを全て利用して管継手を引き伸ばすようにすることができ、配管P,Pへの可撓性管継手10の取付を容易とし施工性を向上することができる。   Moreover, according to this flexible pipe joint 10, the rigidity of the reinforcement member 12 can be improved by making the both ends of the spiral 12b into an annular ring part 12a, and the pipe joint can be compressed and compressed when attached. In addition to the repulsive force due to the elasticity of the tube body 11 in the stretching direction, the repulsive force due to the reinforcing member 12 is generated, and all of these can be used to stretch the pipe joint. The attachment of the joint 10 can be facilitated and the workability can be improved.

さらに、このような可撓性管継手10は、例えば予め補強部材12を射出成形した後、これを成形型内に設置し、管本体11を射出成形することで、補強部材12と管本体11とを一体にすることで成形されるが、管本体11の射出成形後、成形型から取り出した場合に、管本体11と補強部材12との硬度差によって変形することがあるが、この可撓成管継手10では、補強部材12を両端部を環状に連結したリング部12aを有する螺旋状に形成したので、補強部材12の剛性を高めることができ、硬度差による成形後の変形を防止することができ、所定の形状に成形することができる。   Furthermore, such a flexible pipe joint 10 is formed by, for example, previously molding the reinforcing member 12 in advance, then placing the reinforcing member 12 in a molding die, and injection-molding the pipe body 11, whereby the reinforcing member 12 and the pipe body 11. However, when the tube body 11 is taken out of the mold after the injection molding of the tube body 11, it may be deformed due to a difference in hardness between the tube body 11 and the reinforcing member 12. In the pipe joint 10, since the reinforcing member 12 is formed in a spiral shape having a ring portion 12a in which both ends are connected in an annular shape, the rigidity of the reinforcing member 12 can be increased and deformation after molding due to a hardness difference can be prevented. Can be formed into a predetermined shape.

また、この可撓性管継手10によれば、補強部材12の螺旋12bの横断面形状を台形状としたので、曲げた状態にする場合の補強部材12の先端部同士の干渉を防止することができるとともに、底部の幅の矩形断面とする場合などに比べて最小限の材料の使用量で必要な強度や剛性を確保することができる。   Moreover, according to this flexible pipe joint 10, since the cross-sectional shape of the spiral 12b of the reinforcing member 12 is trapezoidal, it is possible to prevent interference between the distal ends of the reinforcing member 12 when bent. In addition, the required strength and rigidity can be ensured with a minimum amount of material used compared to a rectangular cross section having a width at the bottom.

次ぎに、この可撓性管継手10では、管本体11と補強部材12とを同一の合成樹脂とし、可塑剤等の添加剤を加えることで硬度差を持たせるように構成してあるので、管本体11と補強部材12との接着性を高めて一体化することができる。これにより、補強部材12の剛性を有効に利用して成形後の変形を一層防止できるとともに、補強部材12による反発力を施工の際に有効に作用させて施工を容易にすることができ、接着剤等を使用することなく一体化することも可能となる。   Next, in this flexible pipe joint 10, the pipe body 11 and the reinforcing member 12 are made of the same synthetic resin, and are configured to have a hardness difference by adding an additive such as a plasticizer. The adhesiveness between the tube main body 11 and the reinforcing member 12 can be improved and integrated. As a result, the rigidity of the reinforcing member 12 can be effectively used to further prevent deformation after molding, and the repulsive force of the reinforcing member 12 can be effectively applied during construction to facilitate the construction. It is also possible to integrate without using an agent or the like.

さらに、この可撓性管継手10では、管本体11を塩化ビニル樹脂などの透明樹脂または着色透明樹脂で構成するようにすれば、施工の際に配管Pへの差し込み状態が外から分かり、適切に施工することが簡単にできるとともに、汚れなどを外部から簡単に視認することができ、保守管理などを適切に行うことが可能となる。   Furthermore, in this flexible pipe joint 10, if the pipe body 11 is made of a transparent resin such as vinyl chloride resin or a colored transparent resin, the state of insertion into the pipe P can be seen from the outside at the time of construction. It can be easily constructed, and dirt and the like can be easily seen from the outside, so that maintenance management and the like can be performed appropriately.

なお、この可撓性管継手10は、同一合成樹脂により硬度差を持たせて管本体11および補強部材12を構成する場合に限らず、管本体11と補強部材12とを異なる合成樹脂で構成したり、ゴムやエラストマーなどの他の素材を用いるようにしても良い。   The flexible pipe joint 10 is not limited to the case where the pipe body 11 and the reinforcing member 12 are configured with the same synthetic resin having a difference in hardness, but the pipe body 11 and the reinforcing member 12 are formed of different synthetic resins. Alternatively, other materials such as rubber and elastomer may be used.

以下、この発明の実施例について説明するが、本発明は、この実施例に限定するものでない。   Examples of the present invention will be described below, but the present invention is not limited to these examples.

(実施例1)
可撓性管継手の管本体を軟質塩化ビニル樹脂で、硬度を70(JISK6253タイプAデュロメータ)とし、傾斜面の基端部の最も厚い部分の肉厚を2.0mmとし、傾斜面の中央部の肉厚を1.5mmとして0.5mm低くした。
補強部材を硬質塩化ビニル樹脂で、硬度を100とし、螺旋の間隔を15mmとし、螺旋の底部の幅を8mm、螺旋頂部の幅を3.0mm、螺旋の高さを5.0mmとした。
予め補強部材を射出成形して成形した。この後、補強部材を成形型にセットした後、管本体の樹脂を射出し、一体として可撓性管継手を得た。
得られた可撓性管継手を90度の角度に曲げた状態とし、そのときの状態を目視観察し、4段階に評価し、◎:非常に良好、○:良好、△:やや良好、×:不良とした。
その結果は表1に示すように、良好であり、管本体の強度はあったが、施工に支障なく曲げることができた。
(Example 1)
The pipe body of the flexible pipe joint is made of soft vinyl chloride resin, the hardness is 70 (JISK6253 type A durometer), the thickness of the thickest part of the base end of the inclined surface is 2.0 mm, and the central portion of the inclined surface The wall thickness was reduced to 0.5 mm by 1.5 mm.
The reinforcing member was made of hard vinyl chloride resin, the hardness was 100, the spiral interval was 15 mm, the width of the bottom of the spiral was 8 mm, the width of the top of the spiral was 3.0 mm, and the height of the spiral was 5.0 mm.
The reinforcing member was formed by injection molding in advance. Thereafter, after setting the reinforcing member in the mold, the resin of the pipe body was injected to obtain a flexible pipe joint as a unit.
The obtained flexible pipe joint was bent at an angle of 90 degrees, and the state at that time was visually observed and evaluated in four stages, ◎: very good, ○: good, Δ: somewhat good, × : Bad.
As shown in Table 1, the result was good and the pipe body was strong, but could be bent without any trouble in construction.

(実施例2)
管本体の硬度を50とした以外、実施例1と同一にして可撓性管継手を得た。
その結果は表1に示すように、非常に良好であり、螺旋部の変形もなく、よく曲がり、管本体の強度も十分であった。
(Example 2)
A flexible pipe joint was obtained in the same manner as in Example 1 except that the hardness of the pipe body was 50.
As shown in Table 1, the result was very good, there was no deformation of the spiral portion, it was bent well, and the strength of the tube body was sufficient.

(実施例3)
管本体の硬度を30とした以外、実施例1と同一にして可撓性管継手を得た。
その結果は表1に示すように、良好であり、螺旋部の変形もなく、簡単に曲がり、管本体の強度は低下したが、十分であった。
Example 3
A flexible pipe joint was obtained in the same manner as in Example 1 except that the hardness of the pipe body was set to 30.
As shown in Table 1, the result was good, there was no deformation of the spiral portion, it was bent easily, and the strength of the tube body was lowered, but it was sufficient.

(実施例4)
補強部材の硬度を80とした以外、実施例2と同一にして可撓性管継手を得た。
その結果は表1に示すように、良好であり、螺旋部にわずかな変形があり、強度も低下したが、十分であった。
Example 4
A flexible pipe joint was obtained in the same manner as in Example 2 except that the hardness of the reinforcing member was 80.
As shown in Table 1, the result was good, there was a slight deformation in the spiral portion, and the strength was reduced, but it was sufficient.

(実施例5)
管本体の傾斜基端部の厚みを1mmとした以外、実施例2と同一にして可撓性管継手を得た。
その結果は表1に示すように、良好であり、簡単に曲げることができ、管本体の強度は低下したが十分であった。
(Example 5)
A flexible pipe joint was obtained in the same manner as in Example 2 except that the thickness of the inclined base end portion of the pipe body was 1 mm.
As shown in Table 1, the result was good and could be bent easily, and the strength of the tube body was lowered but sufficient.

(実施例6)
管本体の厚みを3mmとした以外、実施例2と同一にして可撓性管継手を得た。
その結果は表1に示すように、良好であり、管本体の強度があったが、支障なく曲げることができた。
Example 6
A flexible pipe joint was obtained in the same manner as in Example 2 except that the thickness of the pipe body was 3 mm.
As shown in Table 1, the result was good and the tube body was strong, but could be bent without any problem.

(実施例7)
螺旋の間隔を10mmとした以外、実施例2と同一にして可撓性管継手を得た。
その結果は表1に示すように、非常に良好であり、螺旋部に変形もなく良く簡単に曲げることができた。
(Example 7)
A flexible pipe joint was obtained in the same manner as in Example 2 except that the spiral interval was 10 mm.
As shown in Table 1, the result was very good, and the spiral portion was not deformed and could be bent easily.

(実施例8)
螺旋の間隔を25mmとした以外、実施例2と同一にして可撓性管継手を得た。
その結果は表1に示すように、良好であり、簡単に曲げることができた。
(Example 8)
A flexible pipe joint was obtained in the same manner as in Example 2 except that the spiral interval was 25 mm.
As shown in Table 1, the result was good and could be bent easily.

(実施例9)
螺旋の頂部の幅を8mmとした以外、実施例2と同一にして可撓性管継手を得た。
その結果は表1に示すように、やや良好であり、わずかに曲げ難くなったが、施工には支障がない程度であった。
Example 9
A flexible pipe joint was obtained in the same manner as in Example 2 except that the width of the top of the spiral was 8 mm.
As shown in Table 1, the results were slightly good and slightly difficult to bend, but there was no problem in construction.

(比較例1)
補強部材の硬度を70とした以外、実施例2と同一にして可撓性管継手を得た。
その結果は表1に示すように、不良であり、螺旋部の強度がなく、曲げた際に座屈した。
(Comparative Example 1)
A flexible pipe joint was obtained in the same manner as in Example 2 except that the hardness of the reinforcing member was 70.
As shown in Table 1, the result was poor, the spiral portion was not strong, and buckled when bent.

(比較例2)
管本体の硬度を80とした以外、実施例1、2と同一にして可撓性管継手を得た。
その結果は表1に示すように、不良であり、曲げようとしても曲げることが困難であった。
(Comparative Example 2)
A flexible pipe joint was obtained in the same manner as in Examples 1 and 2 except that the hardness of the pipe body was 80.
As shown in Table 1, the result was poor, and it was difficult to bend even when trying to bend.

(比較例3)
管本体の硬度を20とした以外、実施例1、2と同一にして可撓性管継手を得た。
その結果は表1に示すように、不良であり、管本体の強度が不足した。
(Comparative Example 3)
A flexible pipe joint was obtained in the same manner as in Examples 1 and 2, except that the hardness of the pipe body was 20.
As shown in Table 1, the result was poor and the strength of the tube body was insufficient.

(比較例4)
管本体の肉厚を5.0mmとした以外、実施例2と同一にして可撓性管継手を得た。
その結果は表1に示すように、不良であり、管本体の強度があり、曲げることができなかった。
(Comparative Example 4)
A flexible pipe joint was obtained in the same manner as in Example 2 except that the thickness of the pipe body was 5.0 mm.
As shown in Table 1, the result was poor, the tube body was strong, and could not be bent.

(比較例5)
管本体の肉厚を0.5mmとした以外、実施例2と同一にして可撓性管継手を得た。
その結果は表1に示すように、不良であり、管本体を曲げた際に破れてしまった。
(Comparative Example 5)
A flexible pipe joint was obtained in the same manner as in Example 2 except that the thickness of the pipe body was 0.5 mm.
As shown in Table 1, the result was poor and was torn when the tube body was bent.

(比較例6)
螺旋の間隔を8mmとした以外、実施例2と同一にして可撓性管継手を得た。
その結果は表1に示すように、不良であり、曲げ角度に制限があり、使用に支障をきたした。
(Comparative Example 6)
A flexible pipe joint was obtained in the same manner as in Example 2 except that the spiral interval was 8 mm.
As shown in Table 1, the results were poor, the bending angle was limited, and the use was hindered.

(比較例7)
螺旋の間隔を30mmとした以外、実施例2と同一にして可撓性管継手を得た。
その結果は表1に示すように、不良であり、曲げた際に、管本体の螺旋間の補強がなされなくなった。
(Comparative Example 7)
A flexible pipe joint was obtained in the same manner as in Example 2 except that the spiral interval was 30 mm.
As shown in Table 1, the result was inferior, and when bent, reinforcement between the spirals of the tube body was not made.

Figure 2009144760
Figure 2009144760

この発明の可撓性管継手の一実施の形態にかかる一部分を切り欠いて示す正面図、側面図および部分拡大断面図である。It is the front view, side view, and partial expanded sectional view which cut and show the part concerning one Embodiment concerning the flexible pipe joint of this invention. この発明の可撓性管継手の一実施の形態にかかる補強部材のみの正面図である。It is a front view of only the reinforcing member concerning one embodiment of the flexible pipe joint of this invention. この発明の可撓性管継手の一実施の形態にかかる90度に曲げた状態の一部分を切り欠いて示す断面図である。It is sectional drawing which notches and shows a part of the state bent at 90 degree | times concerning one Embodiment of the flexible pipe joint of this invention. 従来の可撓性管継手の一部分を切り欠いた断面図である。It is sectional drawing which notched a part of conventional flexible pipe joint.

符号の説明Explanation of symbols

10 可撓性管継手
11 管本体
11a 連結部
11b 中央部
11c 傾斜面
12 補強部材
12a リング部
12b 螺旋
D 螺旋の間隔
P,P 配管
DESCRIPTION OF SYMBOLS 10 Flexible pipe joint 11 Pipe main body 11a Connection part 11b Center part 11c Inclined surface 12 Reinforcement member 12a Ring part 12b Spiral D Spiral spacing P, P Piping

Claims (4)

両端部に連結部を有して内外面がほぼ平滑な管本体と、この管本体の外周に螺旋状に設けられる補強部材とからなる可撓性管継手であって、
前記管本体と前記補強部材とを硬度が異なる合成樹脂で構成し、
前記管本体の硬度を70〜30(JISK6253タイプAデュロメータ)とする一方、前記補強部材の各螺旋の間の当該管本体の表面を、中央部が低くなる傾斜面に形成するとともに、当該傾斜面の基端肉厚を1〜3mmとし、
前記補強部材の硬度を100〜80とするとともに、前記補強部材の両端部を環状に連結したリング部を有する螺旋状に形成し、当該螺旋の間隔を10〜25mmとしたことを特徴とする可撓性管継手。
A flexible pipe joint comprising a pipe body having a connecting part at both ends and a substantially smooth inner and outer surface, and a reinforcing member provided spirally on the outer periphery of the pipe body,
The pipe body and the reinforcing member are made of synthetic resins having different hardnesses,
While the hardness of the pipe body is set to 70 to 30 (JISK6253 type A durometer), the surface of the pipe body between the spirals of the reinforcing member is formed into an inclined surface with a lower central portion, and the inclined surface The base end wall thickness of 1 to 3 mm,
The reinforcing member has a hardness of 100 to 80, is formed in a spiral shape having a ring portion in which both end portions of the reinforcing member are connected in an annular shape, and a space between the spirals is set to 10 to 25 mm. Flexible pipe joint.
前記管本体と前記補強部材とを同一合成樹脂で構成してなることを特徴とする請求項1記載の可撓性管継手。   The flexible pipe joint according to claim 1, wherein the pipe body and the reinforcing member are made of the same synthetic resin. 前記管本体を、透明樹脂または着色透明樹脂で構成したことを特徴とする請求項1または2記載の可撓性管継手。   The flexible pipe joint according to claim 1 or 2, wherein the pipe body is made of a transparent resin or a colored transparent resin. 前記補強部材の螺旋の横断面形状を、台形状としたことを特徴とする請求項1〜3のいずれかに記載の可撓性管継手。   The flexible pipe joint according to any one of claims 1 to 3, wherein a cross-sectional shape of a spiral of the reinforcing member is a trapezoid.
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Cited By (5)

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Publication number Priority date Publication date Assignee Title
KR100972869B1 (en) 2010-03-19 2010-07-29 주식회사 가나오엠 The repair materials for a pipe connection
JP2011094752A (en) * 2009-10-30 2011-05-12 Sekisui Chem Co Ltd Reinforcement-containing strip for manufacturing regeneration pipe
WO2012011529A1 (en) * 2010-07-23 2012-01-26 東拓工業株式会社 Pipeline renewal pipe
JP2012026524A (en) * 2010-07-26 2012-02-09 Kanaflex Corporation Pipeline regeneration pipe
JP2014025559A (en) * 2012-07-30 2014-02-06 Tigers Polymer Corp Corrugated synthetic resin pipe

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JP2005155761A (en) * 2003-11-25 2005-06-16 Kanaflex Corporation Flexible hose
JP2005172186A (en) * 2003-12-15 2005-06-30 Kyodo Rubber Kogyo Kk Flexible pipe joint
JP2005249082A (en) * 2004-03-04 2005-09-15 Kanaflex Corporation Flexible hose
JP2006153239A (en) * 2004-12-01 2006-06-15 Sankei Giken:Kk Flexible expansion joint
JP2007100837A (en) * 2005-10-04 2007-04-19 Kanaflex Corporation Pressure-proof hose and its manufacturing method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58123985U (en) * 1982-02-15 1983-08-23 金尾 史朗 Flexible hose with conical spiral reinforcement
JP2005155761A (en) * 2003-11-25 2005-06-16 Kanaflex Corporation Flexible hose
JP2005172186A (en) * 2003-12-15 2005-06-30 Kyodo Rubber Kogyo Kk Flexible pipe joint
JP2005249082A (en) * 2004-03-04 2005-09-15 Kanaflex Corporation Flexible hose
JP2006153239A (en) * 2004-12-01 2006-06-15 Sankei Giken:Kk Flexible expansion joint
JP2007100837A (en) * 2005-10-04 2007-04-19 Kanaflex Corporation Pressure-proof hose and its manufacturing method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011094752A (en) * 2009-10-30 2011-05-12 Sekisui Chem Co Ltd Reinforcement-containing strip for manufacturing regeneration pipe
KR100972869B1 (en) 2010-03-19 2010-07-29 주식회사 가나오엠 The repair materials for a pipe connection
WO2012011529A1 (en) * 2010-07-23 2012-01-26 東拓工業株式会社 Pipeline renewal pipe
JP2012026516A (en) * 2010-07-23 2012-02-09 Totaku Industries Inc Pipeline renewal pipe
JP2012026524A (en) * 2010-07-26 2012-02-09 Kanaflex Corporation Pipeline regeneration pipe
US9016323B2 (en) 2010-07-26 2015-04-28 Kanaflex Corporation Pipeline regeneration pipe
JP2014025559A (en) * 2012-07-30 2014-02-06 Tigers Polymer Corp Corrugated synthetic resin pipe

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