JP6630761B2 - Fitting for resin pipe - Google Patents

Fitting for resin pipe Download PDF

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JP6630761B2
JP6630761B2 JP2018039190A JP2018039190A JP6630761B2 JP 6630761 B2 JP6630761 B2 JP 6630761B2 JP 2018039190 A JP2018039190 A JP 2018039190A JP 2018039190 A JP2018039190 A JP 2018039190A JP 6630761 B2 JP6630761 B2 JP 6630761B2
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ring
joint
outer peripheral
resin
peripheral surface
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JP2019152296A (en
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勇久 三井
勇久 三井
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株式会社竹村製作所
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Description

本発明は、樹脂管を接続するために、該樹脂管の先端が挿入されて位置されるように受け段部が設けられた被挿入部である内周側、及び雄螺子部が設けられた外周側を有する接続用環状部を備え、前記被挿入部の挿入口の側に該挿入口から挿入方向へ向かって縮径するテーパ内周面が設けられた継手本体と、外周側に先端から根元部に向って拡径するテーパ状に設けられたテーパ状外周部を有し、前記樹脂管の先端部をテーパ状に拡径するように該先端部に内嵌めされるインコアと、前記樹脂管の先端近傍に外嵌めされるようにリング状に形成され、前記継手本体のテーパ内周面に当接されるように先端から後端方向へ向って拡径するテーパ外周面が設けられると共に、後端から先端方向へ切り込まれた形状のスリットが設けられた締付リングと、該締付リングを内包するように前記継手本体の雄螺子部に螺合し、前記樹脂管と前記継手本体とのシール及び抜け止めを行うように、前記締付リングを締め付ける袋ナットとを備える樹脂管用継手に関する。   According to the present invention, in order to connect the resin tube, an inner peripheral side which is an inserted portion provided with a receiving step portion so that the tip of the resin tube is inserted and positioned, and a male screw portion are provided. A joint body having a connection annular portion having an outer peripheral side, a joint body provided with a tapered inner peripheral surface that is reduced in diameter in the insertion direction from the insertion port on the insertion port side of the inserted portion, An incore that has a tapered outer peripheral portion provided in a tapered shape that expands in diameter toward a root portion, and is in-fitted into the distal end portion so as to expand the distal end portion of the resin pipe in a tapered shape; A tapered outer peripheral surface is formed in a ring shape so as to be externally fitted near the distal end of the pipe, and is increased in diameter from the distal end toward the rear end so as to contact the tapered inner peripheral surface of the joint body. , A fastening ring with a slit that is cut from the rear end toward the front end A cap nut screwed onto the male thread portion of the joint main body so as to include the tightening ring, and tightening the tightening ring so as to seal and prevent the resin tube and the joint main body from coming off. The present invention relates to a resin pipe joint comprising:

従来、樹脂管の継手本体からの抜け止めを確実に行う樹脂管用継手の接続構造としては、端部拡径管が、樹脂管の内周面壁が食い込む複数本の竹の子状段部が刻設されたテーパリング部と、該テーパリング部の管端外周に突設された鍔部とから構成され、該鍔部の外径は、鍔部を継手本体に挿入できるように、継手本体の内周面の内径よりも小さく、かつ端部拡径管がシールリングから抜け出ることがないように、シールリングの内径よりも大きくなるように設定され、前記竹の子状段部は、テーパ状外周面に互いに隣接して複数段にわたり形成されている（特許文献１参照）ものが、提案されている。   Conventionally, as a connection structure for a resin pipe joint that reliably prevents the resin pipe from falling out of the joint body, an end-diameter enlarged pipe is engraved with a plurality of bamboo-like stepped portions that the inner peripheral wall of the resin pipe cuts into. And a flange protruding from the outer periphery of the pipe end of the tapered portion, and the outer diameter of the flange is set at the inner circumference of the joint body so that the flange can be inserted into the joint body. It is set to be smaller than the inner diameter of the surface and larger than the inner diameter of the seal ring so that the end enlarged tube does not fall out of the seal ring. There has been proposed one formed adjacent to a plurality of stages (see Patent Document 1).

特開２００９−７９７５０号公報（第１頁）JP 2009-79750 A (page 1)

樹脂管用継手に関して解決しようとする課題は、締付リングが、より確実に、樹脂管の周面に食い込んで、シール及び抜け止めができる形態について、より合理的なものが提案されていないことにある。   The problem to be solved with respect to the resin pipe joint is that no more reasonable form has been proposed for the form in which the tightening ring can bite into the peripheral surface of the resin pipe more securely to prevent sealing. is there.

そこで、本発明の目的は、締付リングが、より確実に、樹脂管の周面に食い込んで、シール及び抜け止めができる樹脂管用継手を提供することにある。   Therefore, an object of the present invention is to provide a joint for a resin pipe in which a tightening ring can more securely bite into the peripheral surface of the resin pipe to seal and prevent the resin ring from coming off.

本発明は上記目的を達成するために次の構成を備える。
本発明にかかる樹脂管用継手の一形態によれば、樹脂管を接続するために、該樹脂管の先端が挿入されて位置されるように受け段部が設けられた被挿入部である内周側、及び雄螺子部が設けられた外周側を有する接続用環状部を備え、前記被挿入部の挿入口の側に該挿入口から挿入方向へ向かって縮径するテーパ内周面が設けられた継手本体と、外周側に先端から根元部に向って拡径するテーパ状に設けられたテーパ状外周部を有し、前記樹脂管の先端部をテーパ状に拡径するように該先端部に内嵌めされるインコアと、前記樹脂管の先端近傍に外嵌めされるようにリング状に形成され、前記継手本体のテーパ内周面に当接されるように先端から後端方向へ向って拡径するテーパ外周面が設けられると共に、後端から先端方向へ切り込まれた形状のスリットが設けられた締付リングと、該締付リングを内包するように前記継手本体の雄螺子部に螺合し、前記樹脂管と前記継手本体とのシール及び抜け止めを行うように、前記締付リングを締め付ける袋ナットとを備える樹脂管用継手において、前記締付リングの先端部の内周に、内側へ帯リング状に盛り上がるように形成された帯リング状凸シール部を備え、前記締付リングの軸方向の中途部であって前記スリットが設けられた部位における該スリットの深さ方向の中途部の内周に、内側へ帯円弧状に盛り上がるように形成された帯円弧状凸抜け止め部を備える。 The present invention has the following configuration to achieve the above object.
According to one aspect of the joint for a resin pipe according to the present invention, in order to connect the resin pipe, an inner peripheral portion which is an inserted portion provided with a receiving stepped portion so that the tip of the resin pipe is inserted and positioned. Side, and a connection annular portion having an outer peripheral side provided with a male screw portion, and a tapered inner peripheral surface that is reduced in diameter from the insertion port toward the insertion direction is provided on the insertion port side of the inserted portion. And a tapered outer peripheral portion provided in a tapered shape that expands in diameter from the distal end toward the root portion on the outer peripheral side, and the distal end portion is formed so that the distal end portion of the resin pipe expands in a tapered shape. And an in-core fitted inside the resin tube, formed in a ring shape so as to be fitted around the front end of the resin pipe, and directed from the front end toward the rear end so as to be in contact with the tapered inner peripheral surface of the joint body. A tapered outer peripheral surface that expands is provided and cut from the rear end toward the front end A tightening ring provided with a slit in a shape, and screwed into a male screw portion of the joint body so as to include the tightening ring, to seal and prevent the resin pipe and the joint body from coming off. In a resin pipe joint having a cap nut for tightening the tightening ring, an inner circumference of a distal end portion of the tightening ring includes a band ring-shaped convex seal portion formed so as to bulge inward into a band ring shape , A belt-shaped arc formed in such a manner as to bulge inward in a band-shaped arc on an inner periphery of a halfway in a depth direction of the slit at a portion where the slit is provided, which is a halfway portion in the axial direction of the tightening ring. It is provided with a convex stopper.

また、本発明にかかる樹脂管用継手の一形態によれば、前記帯リング状凸シール部と、前記帯円弧状凸抜け止め部とは、前記樹脂管の外周面に食い込んでシール及び抜け止めを行うように、所定の巾を有する帯状のシール面を備えることを特徴とすることができる。 Further, according to one aspect of the resin pipe joint according to the present invention, the band ring-shaped convex seal portion and the band arc-shaped convex stopper portion cut into the outer peripheral surface of the resin tube to perform sealing and retaining. As described above, a band-shaped sealing surface having a predetermined width can be provided.

また、本発明にかかる樹脂管用継手の一形態によれば、前記インコアの外周面にリング状の段部が設けられていることを特徴とすることができる。   According to one embodiment of the resin pipe joint according to the present invention, a ring-shaped step portion is provided on an outer peripheral surface of the in-core.

本発明にかかる樹脂管用継手によれば、締付リングが、より確実に、樹脂管の周面に食い込んで、シール及び抜け止めができるという特別有利な効果を奏する。   ADVANTAGE OF THE INVENTION According to the joint for resin pipes which concerns on this invention, there exists a special advantageous effect that a fastening ring can bite into the peripheral surface of a resin pipe more reliably, and can seal and prevent it from falling off.

本発明にかかる樹脂管用継手の形態例を示す断面図である。It is sectional drawing which shows the form example of the joint for resin pipes concerning this invention. 本発明にかかる樹脂管用継手の構成要素である締付リングの形態例を示す先端側から見た斜視図である。It is the perspective view seen from the front end side which shows the example of a form of the fastening ring which is a component of the joint for resin pipes concerning the present invention. 本発明にかかる樹脂管用継手の構成要素である締付リングの形態例を示す後端側から見た斜視図である。It is the perspective view seen from the rear end side which shows the form example of the fastening ring which is a component of the joint for resin pipes concerning the present invention. 本発明にかかる樹脂管用継手の他の形態例を示す断面図である。It is sectional drawing which shows the other example of a joint for resin pipes concerning this invention. 本発明にかかる樹脂管用継手の構成要素であるインコアの形態例を示す先端側から見た斜視図である。It is the perspective view seen from the tip side which shows the example of a form of in-core which is a constituent of the joint for resin pipes concerning the present invention.

以下、本発明にかかる樹脂管用継手の形態例を添付図面（図１〜５）に基づいて詳細に説明する。本発明にかかる樹脂管用継手によって接続される樹脂管５０の代表例は、水道管を構成するものであり、また、水密シールを必要とするものである。なお、本発明にかかる樹脂管用継手は、水などの液体用として利用されるものに限定されることはなく、気体のシールを必要とする場合を含め、流体の管路の接続用として利用できるものである。   Hereinafter, embodiments of the resin pipe joint according to the present invention will be described in detail with reference to the accompanying drawings (FIGS. 1 to 5). A typical example of the resin pipe 50 connected by the resin pipe joint according to the present invention constitutes a water pipe and requires a watertight seal. The resin pipe joint according to the present invention is not limited to one used for a liquid such as water, and can be used for connecting a fluid pipe including a case where a gas seal is required. Things.

１０は継手本体であり、樹脂管５０を接続するために、該樹脂管５０の先端が挿入されて位置されるように受け段部１６が設けられた被挿入部１２である内周側、及び雄螺子部１７が設けられた外周側を有する接続用環状部１１を備え、被挿入部１２の挿入口１３の側に該挿入口１３から挿入方向へ向かって縮径するテーパ内周面１４が設けられている。なお、本形態例の受け段部１６は、筒状内側の所要の挿入深さ位置で段状に縮径されることで形成された円形状の内段になっているが、本発明では、これに限定されることはなく、樹脂管５０が適切な深さに挿入されるように、ストッパとして機能する形態となっていればよい。   Reference numeral 10 denotes a joint body, which is an inserted portion 12 provided with a receiving step portion 16 so that the tip of the resin tube 50 is inserted and positioned to connect the resin tube 50; A connection annular portion 11 having an outer peripheral side provided with a male screw portion 17 is provided. On the side of the insertion opening 13 of the inserted portion 12, a tapered inner peripheral surface 14 whose diameter decreases from the insertion opening 13 in the insertion direction is provided. Is provided. The receiving step 16 of the present embodiment is a circular inner step formed by stepwise reducing the diameter at a required insertion depth position inside the cylindrical shape, but in the present invention, The present invention is not limited to this, and any form may be used as long as it functions as a stopper so that the resin tube 50 is inserted at an appropriate depth.

また、本形態例では、被挿入部１２のテーパ内周面１４に連続する深さ方向の奥側には、徐々に縮径するテーパになっていない平行部１５（筒状の内周面）が設けられている。これによって、樹脂管５０の先端部が適切に挿入されて位置される形態になっている。また、本形態例では、雄螺子部１７の挿入方向の奥側に、スパナーなどの工具が嵌る六角形状などの外形部１８が形成されている。   Further, in the present embodiment, on the far side in the depth direction that is continuous with the tapered inner peripheral surface 14 of the inserted portion 12, a parallel portion 15 (a cylindrical inner peripheral surface) that gradually decreases in diameter is not tapered. Is provided. Thus, the distal end portion of the resin tube 50 is properly inserted and positioned. Further, in the present embodiment, an external portion 18 such as a hexagon in which a tool such as a spanner fits is formed on the inner side in the insertion direction of the male screw portion 17.

また、この継手本体１０の接続用環状部１１に連続される形態は、本形態例では、内周側が流路となって外周側が接続用の雄螺子部１９になっているが、これに限定されず、種々の形態なっていてもよいのは勿論である。例えば、内周側に接続用の雌螺子部を有するものであってもよいし、接続用環状部１１からエルボ状やＴ状の流路が連続的に形成されて、その先に接続用の螺子やその他の接続形態を備えるものであってもよい。   In the present embodiment, the form continuous with the connecting annular portion 11 of the joint body 10 is such that the inner peripheral side is the flow path and the outer peripheral side is the connecting male screw part 19, but is not limited to this. However, it goes without saying that various forms may be used. For example, a female screw portion for connection may be provided on the inner peripheral side, or an elbow-shaped or T-shaped flow path is continuously formed from the connection annular portion 11, and the connection connection portion is formed ahead of it. It may be provided with screws or other connection forms.

２０はインコアであり、外周側に根元部に向って拡径するテーパ状に設けられたテーパ状外周部２１を有し、樹脂管５０の先端部をテーパ状に拡径するように該先端部に内嵌めされるように設けられている。なお、このテーパ状外周部２１のテーパ状とは、滑らかに徐々に拡径する形状の他に、リング状の凹部（溝状を含む）若しくはリング状の凸部などの段状形態のいずれか一つ或いはそれらの組合せを備えることで段々に拡径する形態も含まれることを意味する。   Reference numeral 20 denotes an in-core, which has a tapered outer peripheral portion 21 provided on an outer peripheral side in a tapered shape which expands in diameter toward a root portion, and the distal end of the resin tube 50 is tapered so as to expand in diameter. It is provided so as to be fitted inside. In addition, the tapered outer peripheral portion 21 may be any one of a stepped shape such as a ring-shaped concave portion (including a groove shape) or a ring-shaped convex portion, in addition to a shape gradually and smoothly expanding in diameter. The provision of one or a combination thereof means that the diameter is gradually increased.

３０は締付リングであり、樹脂管５０の先端近傍に外嵌めされるようにリング状に形成され、継手本体１０のテーパ内周面１４に当接されるように先端から後端方向へ向って拡径するテーパ外周面３１が設けられると共に、後端から先端方向へ切り込まれたスリット３２が設けられている。なお、本形態例では、図２又は３に記載されているように、円周等分位置に４つのスリット３２が形成されているが、その数は本形態例に限定されることはなく、樹脂管５０のサイズなどに応じて適宜に設定できる。   Reference numeral 30 denotes a tightening ring, which is formed in a ring shape so as to be externally fitted near the front end of the resin pipe 50, and is directed from the front end to the rear end so as to be in contact with the tapered inner peripheral surface 14 of the joint body 10. In addition to the tapered outer peripheral surface 31 having a larger diameter, a slit 32 cut from the rear end toward the distal end is provided. In the present embodiment, as shown in FIG. 2 or 3, four slits 32 are formed at equally spaced positions on the circumference, but the number is not limited to the present embodiment. It can be set appropriately according to the size of the resin tube 50 and the like.

４０は袋ナットであり、締付リング３０を内包するように継手本体１０の雄螺子部１７に、雌螺子部４２が螺合し、樹脂管５０と継手本体１０とのシール及び抜け止めを行うように、締付リング３０を締め付けるように設けられている。また、本形態例の袋ナット４０は、締付リング３０の後端に接する部分が、締付方向へ徐々に拡径する内面の傾斜面４１が形成されており、袋ナット４０が締め付けられて軸方向へ変位すると、内面の傾斜面４１が締付リング３０を押圧して樹脂管５０の挿入方向へ締め付ける形態になっている。なお、この内面の傾斜面４１に対応して、締付リング３０の後端も締付方向へ徐々に拡径する後端の傾斜面３５が形成されている。   Reference numeral 40 denotes a cap nut, which is screwed with the female screw portion 42 of the male screw portion 17 of the joint main body 10 so as to include the tightening ring 30, and seals the resin pipe 50 and the joint main body 10 and prevents the resin main body 10 from coming off. Thus, the fastening ring 30 is provided so as to be fastened. Further, in the cap nut 40 of the present embodiment, a portion in contact with the rear end of the tightening ring 30 has an inner inclined surface 41 whose diameter gradually increases in the tightening direction, and the cap nut 40 is tightened. When displaced in the axial direction, the inclined surface 41 on the inner surface presses the tightening ring 30 to tighten the resin ring 50 in the insertion direction. The rear end of the tightening ring 30 is also formed with a rear end inclined surface 35 whose diameter gradually increases in the tightening direction, corresponding to the inner inclined surface 41.

そして、本発明にかかる樹脂管用継手においては、締付リング３０の先端部の内周に、内側へ帯リング状に盛り上がるように形成された帯リング状凸シール部３３を備える。本形態例の帯リング状凸シール部３３は、軸心を中心にして形成される円形リング状で、断面矩形状に盛り上がった形態であり、先端から所定の巾を有する帯状のシール面を備える形態になっている。   The joint for resin pipes according to the present invention includes a band ring-shaped convex seal portion 33 formed on the inner periphery of the distal end portion of the tightening ring 30 so as to bulge inward into a band ring shape. The belt ring-shaped convex seal portion 33 of the present embodiment is a circular ring formed around the axis, has a bulged shape with a rectangular cross section, and has a band-shaped seal surface having a predetermined width from the tip. It is in the form.

これによれば、締付リングが、より確実に、樹脂管５０の外周面に食い込んで、シール及び抜け止めを行うことができる。すなわち、締付リング３０の先端側の内周面の全体がシール面となっている場合よりも、シール面積の小さい線シールに近い形態になっているため、適度に締め付け力を集中できる形態となっている。従って、シールと抜け止めの両方の効果を高めることができる。このため、耐震性を高めることもできる。   According to this, the fastening ring can bite into the outer peripheral surface of the resin tube 50 more reliably to perform sealing and retaining. That is, since the entire inner peripheral surface on the distal end side of the tightening ring 30 is closer to a line seal having a smaller seal area than when the entirety of the inner peripheral surface is a seal surface, a mode in which the tightening force can be appropriately concentrated can be achieved. Has become. Therefore, the effects of both sealing and retaining can be enhanced. For this reason, the earthquake resistance can be improved.

また、本形態例の樹脂管用継手においては、締付リング３０の軸方向の中途部であってスリット３２が設けられた部位の内周に、内側へ帯円弧状に盛り上がるように形成された帯円弧状凸抜け止め部３４を備えている。本形態例の帯円弧状凸抜け止め部３４は、軸心を中心にして形成される円形リング状の形状が、スリット３２によって分割されることで形成される複数の円弧状になっており、締付リング３０の後端から締め付け方向へ所要の深さ離れた位置に、内側へ張り出した凸状に設けられている。   Further, in the resin pipe joint according to the present embodiment, a band formed so as to bulge inwardly in a band arc shape on the inner periphery of a portion where the slit 32 is provided, which is an intermediate portion in the axial direction of the tightening ring 30. An arc-shaped convex retaining portion 34 is provided. The band arc-shaped convex stopper portion 34 of the present embodiment has a plurality of arc shapes formed by dividing a circular ring shape formed around the axis by the slit 32, At a position away from the rear end of the tightening ring 30 by a required depth in the tightening direction, it is provided in a convex shape projecting inward.

これによれば、帯円弧状凸抜け止め部３４が、締付リング３０の内周面の全体が抜け止め用の面となっている場合よりも、抜け止め用の面積の小さい線接触に近い形態になっているため、適度に締め付け力を集中できる形態となっている。従って、抜け止めの効果を高めることができ、耐震性を高めることができる。   According to this, the band arc-shaped convex retaining portion 34 is closer to a line contact having a smaller area for retaining than the case where the entire inner peripheral surface of the fastening ring 30 is a surface for retaining. Since it is in the form, it is a form in which the tightening force can be appropriately concentrated. Therefore, the effect of retaining can be enhanced, and the earthquake resistance can be enhanced.

そして、この帯円弧状凸抜け止め部３４が、スリット３２の深さ方向の中途部に設けられていることで、梃子の作用点となり、スリット３２が形成された円弧状側周壁の根元部が、支点となる。また、袋ナット４０で押圧されて管継手５０の挿入方向へ締め付けられると共に、袋ナット４０の内面の傾斜面４１及び／又は締付リング３０の後端の傾斜面３５によって内側へ押圧力を受ける締付リング３０の後端が、力点となる。これによれば、締付リング３０の後端を締め付ける力が、梃子の原理で効果的に作用し、帯円弧状凸抜け止め部３４が、管継手５０の外周面に確実に強く食い込み、抜け止めの効果を高めることができる。   And since this belt-shaped arc-shaped convex stopper part 34 is provided in the middle part of the depth direction of the slit 32, it becomes an operation point of a lever, and the root part of the arc-shaped side peripheral wall in which the slit 32 is formed is formed. Fulcrum. Further, the cap nut 40 is pressed and tightened in the insertion direction of the pipe joint 50, and is also pressed inward by the inclined surface 41 of the inner surface of the cap nut 40 and / or the inclined surface 35 of the rear end of the fastening ring 30. The rear end of the fastening ring 30 is the point of force. According to this, the force for tightening the rear end of the tightening ring 30 effectively acts on the principle of leverage, and the belt-shaped arc-shaped convex slip-off preventing portion 34 bites into the outer peripheral surface of the pipe joint 50 firmly and securely. The effect of stopping can be enhanced.

また、図４に示す形態例の樹脂管用継手においては、インコア２０の外周面にリング状の段部２２が設けられている。本形態例では、インコア２０の外周面に軸方向の中途部に、二筋のリング状の段部２２が、凹溝状に形成されている。このインコア２０は、金属材で形成されており、図４、５に示すように、テーパ状外周部２１の拡径された根元部に、軸心線に直交する方向である外側へ張り出すように円形フランジ状に形成された鍔部２３を備える。   Further, in the resin pipe joint of the embodiment shown in FIG. 4, a ring-shaped step portion 22 is provided on the outer peripheral surface of the in-core 20. In the present embodiment, two streaks of ring-shaped steps 22 are formed in a concave groove shape in the middle part in the axial direction on the outer peripheral surface of the in-core 20. The in-core 20 is formed of a metal material and, as shown in FIGS. 4 and 5, protrudes outward from the tapered outer peripheral portion 21 in a direction perpendicular to the axis of the axis at the expanded root portion. A flange 23 formed in a circular flange shape.

これによれば、締め付けられることで、樹脂管５０の内周面がリング状の段部２２に押し付けられて食い込み、抜け止め効果を高めることができる。そして、図４に示すように、前述の締付リング３０の形態と合わせて用いることで、シール及び抜け止めを、相乗効果で高めることができる。また、この鍔部２３によれば、インコア２０が樹脂管５０に挿入された際に、入り過ぎ防止や樹脂管５０の端部がだれるように変形することを防止できる。   According to this, by being tightened, the inner peripheral surface of the resin tube 50 is pressed against the ring-shaped step portion 22 and bites into the resin tube 50, so that the retaining effect can be enhanced. Then, as shown in FIG. 4, by using in combination with the form of the above-described tightening ring 30, the seal and the retaining can be enhanced by a synergistic effect. Further, according to the flange portion 23, when the in-core 20 is inserted into the resin tube 50, it is possible to prevent the in-core 20 from excessively entering and prevent the end portion of the resin tube 50 from being deformed so as to drop.

また、本発明につき好適な形態例を挙げて種々説明してきたが、本発明は以上の形態例に限定されるものではなく、発明の精神を逸脱しない範囲内で多くの改変を施し得るのは勿論のことである。   Although the present invention has been described in various forms with reference to preferred embodiments, the present invention is not limited to the above-described embodiments, and many modifications can be made without departing from the spirit of the invention. Of course.

１０ 継手本体
１１ 接続用環状部
１２ 被挿入部
１３ 挿入口
１４ テーパ内周面
１５ 平行部
１６ 受け段部
１７ 雄螺子部
１８ 外形部
１９ 接続用の雄螺子部
２０ インコア
２１ テーパ状外周部
２２ リング状の段部
２３ 鍔部
３０ 締付リング
３１ テーパ外周面
３２ スリット
３３ 帯リング状凸シール部
３４ 帯円弧状凸抜け止め部
３５ 後端の傾斜面
４０ 袋ナット
４１ 内面の傾斜面
４２ 雌螺子部
５０ 樹脂管 DESCRIPTION OF SYMBOLS 10 Joint main body 11 Connection annular part 12 Inserted part 13 Insertion opening 14 Tapered inner peripheral surface 15 Parallel part 16 Receiving step part 17 Male screw part 18 Outer part 19 Male screw part 20 for connection 20 In-core 21 Tapered outer peripheral part 22 Ring Stepped portion 23 flange portion 30 tightening ring 31 tapered outer peripheral surface 32 slit 33 band ring-shaped convex seal portion 34 band arc-shaped convex stopper portion 35 rear end inclined surface 40 cap nut 41 inner surface inclined surface 42 female screw portion 50 resin pipe

Claims (3)

樹脂管を接続するために、該樹脂管の先端が挿入されて位置されるように受け段部が設けられた被挿入部である内周側、及び雄螺子部が設けられた外周側を有する接続用環状部を備え、前記被挿入部の挿入口の側に該挿入口から挿入方向へ向かって縮径するテーパ内周面が設けられた継手本体と、
外周側に先端から根元部に向って拡径するテーパ状に設けられたテーパ状外周部を有し、前記樹脂管の先端部をテーパ状に拡径するように該先端部に内嵌めされるインコアと、
前記樹脂管の先端近傍に外嵌めされるようにリング状に形成され、前記継手本体のテーパ内周面に当接されるように先端から後端方向へ向って拡径するテーパ外周面が設けられると共に、後端から先端方向へ切り込まれた形状のスリットが設けられた締付リングと、
該締付リングを内包するように前記継手本体の雄螺子部に螺合し、前記樹脂管と前記継手本体とのシール及び抜け止めを行うように、前記締付リングを締め付ける袋ナットとを備える樹脂管用継手において、
前記締付リングの先端部の内周に、内側へ帯リング状に盛り上がるように形成された帯リング状凸シール部を備え、
前記締付リングの軸方向の中途部であって前記スリットが設けられた部位における該スリットの深さ方向の中途部の内周に、内側へ帯円弧状に盛り上がるように形成された帯円弧状凸抜け止め部を備えることを特徴とする樹脂管用継手。 In order to connect the resin tube, it has an inner peripheral side which is an inserted portion provided with a receiving step portion so that the tip of the resin tube is inserted and positioned, and an outer peripheral side provided with a male screw portion A joint body having a connection annular portion, provided with a tapered inner peripheral surface on the insertion port side of the inserted portion, the diameter of which is reduced from the insertion port toward the insertion direction;
The outer peripheral side has a tapered outer peripheral portion provided in a tapered shape expanding in diameter from the distal end toward the root portion, and is fitted inside the distal end portion so as to expand the distal end portion of the resin tube in a tapered shape. With incore,
A tapered outer peripheral surface is formed in a ring shape so as to be externally fitted near the distal end of the resin pipe, and is expanded in diameter from the distal end toward the rear end so as to abut on the tapered inner peripheral surface of the joint body. And a fastening ring provided with a slit having a shape cut from the rear end toward the front end,
A cap nut that is screwed into the male thread portion of the joint main body so as to include the tightening ring, and tightens the tightening ring so as to seal and prevent the resin tube and the joint main body from coming off. For resin pipe joints,
On the inner periphery of the distal end of the tightening ring, a band ring-shaped convex seal portion formed so as to bulge in a band ring shape inward ,
A belt-shaped arc formed in such a manner as to bulge inward in a band-shaped arc on an inner periphery of a halfway in a depth direction of the slit at a portion where the slit is provided, which is a halfway portion in the axial direction of the tightening ring. A joint for resin pipes, comprising a convex retaining portion. 前記帯リング状凸シール部と、前記帯円弧状凸抜け止め部とは、前記樹脂管の外周面に食い込んでシール及び抜け止めを行うように、所定の巾を有する帯状のシール面を備えることを特徴とする請求項１記載の樹脂管用継手。 The band ring-shaped convex seal portion and the band arc-shaped convex stopper portion are provided with a band-shaped seal surface having a predetermined width so as to bite into an outer peripheral surface of the resin tube to perform sealing and retaining. The joint for a resin pipe according to claim 1, wherein: 前記インコアの外周面にリング状の段部が設けられていることを特徴とする請求項１又は２記載の樹脂管用継手。   The resin pipe joint according to claim 1, wherein a ring-shaped step is provided on an outer peripheral surface of the in-core.
JP2018039190A 2018-03-06 2018-03-06 Fitting for resin pipe Active JP6630761B2 (en)

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