JP4145123B2 - Fittings - Google Patents

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Publication number
JP4145123B2
JP4145123B2 JP2002333753A JP2002333753A JP4145123B2 JP 4145123 B2 JP4145123 B2 JP 4145123B2 JP 2002333753 A JP2002333753 A JP 2002333753A JP 2002333753 A JP2002333753 A JP 2002333753A JP 4145123 B2 JP4145123 B2 JP 4145123B2
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Prior art keywords
end portion
peripheral surface
portion
joint body
core member
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JP2002333753A
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Japanese (ja)
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JP2004169758A (en )
Inventor
剛一 中村
延彦 林
昌宏 置田
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株式会社オンダ製作所
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【0001】 [0001]
【発明の属する技術分野】 BACKGROUND OF THE INVENTION
本発明は、例えば水道配管、温水配管等と樹脂パイプとの間を接続する継手に関するものである。 The present invention is, for example water pipes, to a coupling for connecting the hot water pipe or the like and the resin pipe.
【0002】 [0002]
【従来の技術】 BACKGROUND OF THE INVENTION
従来より、例えば水道配管に、架橋ポリエチレン又はポリブテン製の樹脂パイプを接続するために継手が使用されている。 Conventionally, for example, water pipes, fittings are used to connect the cross-linked polyethylene or polybutene made of plastic pipe. この種の継手としては、以下に示すものが知られている(例えば、特許文献1参照)。 As this type of joint is known as shown below (for example, see Patent Document 1). すなわち、内部に樹脂パイプを接続可能に構成した継手本体と、樹脂パイプの端部に内嵌されるコア部材と、継手本体から樹脂パイプを抜け止め保持するためのロックリングとを備えているタイプのものである。 That is, the type includes a joint body which is connectable to the plastic pipe therein, a core member is fitted into the end of the plastic pipe, and a locking ring for holding retaining the plastic pipe from the fitting body belongs to.
【0003】 [0003]
前記継手本体の中央部内周面には溝部が周設され、その溝部にはOリングが嵌着されている。 Wherein the central portion inner peripheral surface of the fitting body groove is circumferentially provided, O-ring is fitted in the groove portion. また、前記コア部材は略円筒状をなし、その外端側には樹脂パイプの内側に嵌入可能な外径を有する筒部が形成され、該筒部の略中央部外周面には収容溝が周設されている。 Further, the core member is a substantially cylindrical shape, the cylindrical portion having an outer diameter fittable inside the plastic pipe is formed on the outer end side, the accommodation groove in the substantially central portion outer peripheral surface of the cylindrical portion It is circumferentially provided. この収容溝にはシールリングが嵌着され、樹脂パイプの端部にコア部材が内嵌された際には、樹脂パイプの端部内周面と筒部の外周面との間をシールするようになっている。 Seal rings on the receiving groove is fitted, when the core member to an end of the plastic pipe has been fitted in, as a seal between the outer peripheral surface of the inner peripheral surface of an end portion of the resin pipe and the cylindrical portion going on. そして、コア部材が内嵌された樹脂パイプを継手本体内に挿入すると、前記Oリングの内周面とコア部材の内端部外周面とが密接されることにより、継手本体の内周面とコア部材の内端部外周面との間が完全にシールされるようになっている。 When inserting the inner fitting resinous pipe core member within the joint body, by the inner peripheral surface and the inner end portion outer peripheral surface of the core member of the O-ring is tightly, the inner peripheral surface of the joint body between the inner end portion outer peripheral surface of the core member is adapted to be completely sealed.
【0004】 [0004]
【特許文献1】 [Patent Document 1]
特開2001―254884号公報 (第3〜5頁、図2) JP 2001-254884 JP (No. 3-5, pp. 2)
【0005】 [0005]
【発明が解決しようとする課題】 [Problems that the Invention is to Solve
ところが、上記従来構成の場合、継手本体の内周面とコア部材の内端部外周面との間が密接し、コア部材の内端部が継手本体内に実質上固定されている。 However, in the case of the conventional structure, between the inner peripheral surface and the inner end portion outer peripheral surface of the core member of the joint body is closely, the inner end portion of the core member is substantially fixed in the fitting body. このため、樹脂パイプに対して曲げ応力が加わった際には、樹脂パイプが前記曲げ応力に応じて変形される。 Therefore, when the applied bending stress to the resin pipe, the resin pipe is deformed in accordance with the bending stress. 従って、コア部材の外周面の収容溝に嵌着されたシールリングと樹脂パイプの端部内周面との間に隙間が生じ、その部分を通じて漏水するおそれがあるという問題があった。 Therefore, the gap between the outer peripheral surface end portion inner peripheral surface of the seal ring and the plastic pipe, which is fitted into the accommodating groove of the core member occurs, there is a problem that a risk of leakage is through that portion.
【0006】 [0006]
この発明は、このような従来技術に存在する問題点に着目してなされたものである。 The present invention was made in view of the problems existing in the prior art. その目的とするところは、樹脂パイプの変形を防ぎ、コア部材の外周面と樹脂パイプの内周面との間の隙間をなくして漏水を防止することができる継手を提供することにある。 And has an object to prevent deformation of the plastic pipe, it is to provide a joint that can prevent water leakage by eliminating the gap between the outer peripheral surface and the inner circumferential surface of the plastic pipe of the core member.
【0007】 [0007]
【課題を解決するための手段】 In order to solve the problems]
上記の目的を達成するために、請求項1に記載の発明の継手は、筒状をなし、基端部には管体が接続され、先端部には樹脂パイプが挿入されて接続されるとともに、中央部内周面は基端部の内径よりも先端部の内径が大きくなる段差状に形成され、その段差部分に樹脂パイプの先端が当接される当接面が設けられた継手本体と、略円筒状をなし、内端部は継手本体の基端部内に挿着され、外端部は継手本体の先端部内に位置し、中央部外周面は内端部の外径よりも外端部の外径が小さくなる段差状に形成され、その段差部分に樹脂パイプの先端が係合される係合面が設けられ、内端部外周面と継手本体の基端部内周面との間には両者間をシールするシール手段が設けられるとともに、外端部外周面には樹脂パイプ内周面との間をシールするシ To achieve the above object, the joint of the first aspect of the present invention, a tubular shape, the proximal end portion is connected to the tube, with the distal end portion is connected plastic pipe is inserted , the central inner peripheral surface is formed in a stepped shape so that the inner diameter of the distal end portion than the inner diameter of the proximal portion increases, and the fitting body for abutment surface is provided with the tip of the resin pipe is abutting on the stepped portion, a substantially cylindrical shape, the inner end portion is inserted into the proximal end portion of the fitting body, the outer end portion is located in the distal end portion of the joint body, the outer end than the outer diameter of the central outer peripheral surface the inner end the outer diameter is formed in a stepped shape so that the smaller, between its step portion of the resin pipe tip engagement surface is provided to be engaged with the inner end outer peripheral surface and the base end portion peripheral surface of the joint body Shi, together with sealing means for sealing therebetween is provided, on the outer end portion outer peripheral surface for sealing between the plastic pipe inner peripheral surface ル機構が設けられたコア部材と、継手本体の先端部に設けられ、樹脂パイプを抜け止め保持するための保持手段とを備え、前記コア部材の内端部外周面と継手本体の基端部内周面との間には、樹脂パイプに加わる曲げ応力による変形に追従して継手本体の軸線と交差する方向へのコア部材の動きを許容する空隙が設けられているものである。 A core member which Le mechanism is provided, provided at the distal end portion of the joint body, and a holding means for holding retaining the plastic pipe, a base end portion of the inner end outer peripheral surface and the fitting body of the core member between the circumferential surface, in which the gap to allow movement of the core member following the deformation by bending stress applied to the resin pipe in a direction intersecting the axis of the joint main body.
【0008】 [0008]
請求項2に記載の発明の継手は、請求項1に記載の発明において、前記継手本体の当接面の近傍位置には継手本体の軸線と直交する方向に延びる貫通孔が透設され、該貫通孔には継手本体の先端部から挿入された樹脂パイプが当接することにより継手本体の外周面から突出して視認できるような押出ピンが挿通支持されているものである。 Fitting of the invention described in claim 2 is the invention according to claim 1, abutment surface through hole extending in a direction perpendicular to the axis of the joint body is in the vicinity of said joint body is Toru設, the the through-holes are those extrusion pin as visible protruding from the outer peripheral surface of the joint body by resin pipes inserted from the distal end portion of the fitting body abuts is inserted and supported.
【0009】 [0009]
請求項3に記載の発明の継手は、請求項1又は請求項2に記載の発明において、前記コア部材の内端部が継手本体の基端部内に挿着された状態で、コア部材のシール手段から係合面までの距離は、継手本体の当接面から押出ピンの樹脂パイプ当接部までの距離より長くなるように設定されているものである。 Fitting of the invention described in claim 3 is the invention according to claim 1 or claim 2, in a state where the inner end portion of the core member is inserted into the proximal end portion of the fitting body, the core member seals distance from the means to the engagement surface is one that is set to be longer than the distance from the contact surface of the fitting body until the resin pipe abutment extrusion pin.
【0010】 [0010]
【発明の実施の形態】 DETAILED DESCRIPTION OF THE INVENTION
以下、本発明の実施形態を図面に基づいて詳細に説明する。 It will be described in detail with reference to embodiments of the present invention with reference to the drawings.
図1及び図2に示すように、継手本体11は略円筒状をなし、その基端部外周面には第1雄ねじ部12が螺刻され、図示しない水道配管等の管体に螺合可能になっている。 As shown in FIGS. 1 and 2, the joint body 11 is a substantially cylindrical shape, at its base end an outer circumferential surface first male threaded portion 12 is threaded, can be screwed to the tubular body of the water pipe or the like (not shown) It has become. 継手本体11の基端部内周面は基端部の内径よりも先端部の内径が大きくなる段差状に形成されており、その段差部分が第1当接面13となっている。 The proximal inner peripheral surface of the joint body 11 is formed in a stepped shape so that the inner diameter of the distal end portion than the inner diameter of the proximal portion increases, the stepped portion is in the first abutment surface 13.
【0011】 [0011]
継手本体11の軸線14方向の中央部内周面は、基端部の内径よりも先端部の内径が大きくなる段差状に形成され、その段差部分が第2当接面15となっている。 Central inner peripheral surface of the axis 14 direction of the joint body 11 is formed in a stepped shape so that the inner diameter of the distal end portion than the inner diameter of the proximal end portion is increased, the step portion is in the second contact surface 15. この第2当接面15を境界として、第2当接面15よりも継手本体11の先端側には樹脂パイプ16等が挿入される空間が形成されている。 The second contact surface 15 as a boundary, the distal end side of the joint body 11 than the second contact face 15 is a space such as a resin pipe 16 is inserted are formed. また、第2当接面15の内端縁には、継手本体11の基端側に向かうに従い縮径する第1面取り部17が設けられている。 Further, the inner edge of the second contact surface 15, first chamfered portion 17 reduced in diameter toward the base end side of the joint body 11 is provided.
【0012】 [0012]
第2当接面15より僅かに先端側には、略円柱状をなす貫通孔18が継手本体11の軸線14と直交する方向に延びるように1箇所形成されている。 The second slightly distal to the abutting surface 15, a through hole 18 having a substantially cylindrical shape are formed one place so as to extend in a direction perpendicular to the axis 14 of the joint body 11. 貫通孔18の内周面には第1段差部18aが形成され、その第1段差部18aよりも上方における孔径はその下方における孔径に比べて大きくなっている。 The inner peripheral surface of the through hole 18 is formed first stepped portion 18a, the hole diameter in the upper than the first step portion 18a is larger than the hole diameter at the bottom. 第1段差部18aよりも上方には略円筒状をなすカラー19が嵌入されており、その内周面には第2段差部19aが設けられ、同第2段差部19aより内部に環状凹部19bが形成されている。 The above the first stepped portion 18a are fitted into collar 19 having a substantially cylindrical shape, of which the circumferential surface is provided with a second stepped portion 19a, the second step portion annular recess 19b therein from 19a There has been formed. そして、樹脂パイプ16の継手本体11内への挿入状態を視認するための略円柱状をなす押出ピン20が前記カラー19を介して貫通孔18に挿通支持されている。 The push-out pin 20 having a substantially cylindrical for viewing the insertion state into the joint body 11 of the resin pipe 16 is inserted and supported in the through hole 18 through the collar 19. この押出ピン20の内端部は円錐形状をなし、内方に向かうほど縮径するテーパ面20aが形成されている。 The inner end portion of the ejector pin 20 forms a conical shape, a tapered surface 20a whose diameter decreases as it goes inward is formed. また、押出ピン20の中間部には大径部21が形成されており、この大径部21が前記環状凹部19bをスライドすることによって、押出ピン20が貫通孔18内を往復動可能に構成されている。 Further, the intermediate portion of the ejector pin 20 is formed with a large-diameter portion 21, by the large diameter portion 21 slides the annular recess 19b, push-out pin 20 is reciprocally configured in the through-holes 18 It is.
【0013】 [0013]
貫通孔18内における押出ピン20の往復動は、押出ピン20の大径部21の内端面が貫通孔18の第1段差部18aに係合する位置と、大径部21の外端面がカラー19の第2段差部19aに係合する位置との間において規制されている。 Reciprocating extrusion pin 20 in the through hole 18, a position where the inner end surface of the large diameter portion 21 is engaged with the first stepped portion 18a of the through hole 18 of the push-out pin 20, the outer end surface of the large diameter portion 21 a color It is restricted between a position engaging the second stepped portion 19a of 19. つまり、押出ピン20の外端部が貫通孔18内に没入し、内端部が貫通孔18から内方へ突出する位置と、押出ピン20の外端部が継手本体11の外周面から外方に突出し、内端部が貫通孔18内に没入する位置との間を変位しうる構成となっている。 In other words, the outer end of the push-out pin 20 is retracted into the through hole 18, a position projecting inwardly from the inner end through hole 18, out of the outer peripheral surface of the outer end joint body 11 of the ejector pin 20 Write to protrude, the inner end portion has a configuration capable of displacement between a position retracted into the through hole 18. また、押出ピン20の外周面は赤色に着色されており、押出ピン20が継手本体11の外周面から外方に突出した際に押出ピン20の外端部が視認し易くなっている。 The outer peripheral surface of the ejector pin 20 is colored in red, extrusion pin 20 becomes easy to visually recognize the outer end of the push-out pin 20 when the protruding outward from the outer peripheral surface of the joint body 11.
【0014】 [0014]
図2に示すように、継手本体11内に樹脂パイプ16を挿入する以前は、押出ピン20の大径部21の内端面が貫通孔18の第1段差部18aに係合するとともに、押出ピン20の外端面と継手本体11の外周面とが面一となっている。 As shown in FIG. 2, with prior to inserting the resin pipe 16 into the joint body 11, the inner end surface of the large-diameter portion 21 of the extrusion pin 20 is engaged with the first stepped portion 18a of the through hole 18, the extrusion pin 20 and the outer end surface and the outer peripheral surface of the joint body 11 are flush with each. 一方、図1に示すように、樹脂パイプ16の先端が第2当接面15に当接した際には、押出ピン20の大径部21の外端面がカラー19の第2段差部19aに係合するとともに、押出ピン20の外端部が継手本体11の外周面から外方に突出するようになっている。 On the other hand, as shown in FIG. 1, when the leading end of the resin pipe 16 is in contact with the second contact surface 15, the second stepped portion 19a of the outer end face collar 19 of the large diameter portion 21 of the ejector pin 20 as well as engaging the outer end portion of the ejector pin 20 is adapted to protrude outward from the outer peripheral surface of the joint body 11.
【0015】 [0015]
継手本体11の先端部内周面には雌ねじ部22が螺刻され、略円筒状をなす押し輪23の先端部外周面に螺刻された第2雄ねじ部24が螺合されることにより、継手本体11の先端部に押し輪23が取付けられる。 The distal end portion inner peripheral surface of the joint body 11 internally threaded portion 22 is threaded, by the second male threaded portion 24 which is threaded to the distal end outer peripheral face of the press ring 23 having a substantially cylindrical shape is screwed joint wheels 23 press the leading end portion of the main body 11 is attached. 該押し輪23の中心には、挿入孔25が貫通形成されており、先端部内周面には挿入孔側端縁から継手本体11の軸線14方向内方に向かうに従い縮径する第2面取り部26が設けられている。 Pusher in the center of the wheel 23, the insertion holes 25 are formed through the second chamfered portion reduced in diameter in accordance with the distal end portion inner peripheral surface extending from the insertion hole side edge in the axis 14 inwardly of the joint body 11 26 is provided.
【0016】 [0016]
継手本体11の内周部において、雌ねじ部22よりも基端側には、内周全体にわたって係止段部27が形成されている。 The inner peripheral portion of the joint body 11, the base end side of the internal thread portion 22, engaging stepped portion 27 is formed over the entire inner circumference. この係止段部27と押し輪23の先端面との間には、樹脂パイプ16を抜け止め保持する保持手段としての一対のロックリング28が、その間に円環状のスペーサ29を介装した状態で挟着されている。 State this Between the front end surface of the engaging step portion 27 and the press wheels 23, a pair of lock ring 28 as a holding means for holding retaining the resin pipe 16, which is interposed an annular spacer 29 therebetween in has been clamped. 図3に示すように、これらロックリング28は、ステンレス鋼等の金属材料製の円環状をなすベースリング28aと、ベースリング28aから内方へ同一長さで一定の角度をもって突出する複数の規制片28bとからそれぞれ構成されている。 As shown in FIG. 3, these locking ring 28, a plurality of regulating projecting with a base ring 28a, a constant angle with the same length from the base ring 28a inwardly forming a metal material made of an annular stainless steel It is structured from a piece 28b.
【0017】 [0017]
そして、継手本体11内に接続された樹脂パイプ16に引き抜き力が作用したときには、両ロックリング28の各規制片28bの先端が樹脂パイプ16の外周面にそれぞれ食い込むことにより、樹脂パイプ16は継手本体11内に抜け止め保持されるようになっている。 When the force pulling the plastic pipe 16 connected to the joint body 11 is applied, by the tip of the restricting piece 28b of the both lock ring 28 bites each outer peripheral surface of the resin pipe 16, the resin pipe 16 is joint It is adapted to be retaining held in the body 11. このため、継手は、継手本体11内に樹脂パイプ16を挿入する作業のみで樹脂パイプ16を挿着することができるワンタッチ継手として構成されている。 Therefore, the joint is configured as a one-touch joint only operation of inserting the plastic pipe 16 into the fitting body 11 can be inserted a plastic pipe 16.
【0018】 [0018]
図2に示すように、コア部材30は略円筒状をなし、その内端部が継手本体11の基端部内に挿着されている。 As shown in FIG. 2, the core member 30 is a substantially cylindrical shape, its inner end portion is inserted in the proximal portion of the joint body 11. 継手本体11の先端部内周面とコア部材30の外端部外周面との間には樹脂パイプ挿入空間31が設けられ、該樹脂パイプ挿入空間31の厚みは樹脂パイプ16の厚みと略同一に設定されている。 Plastic pipe insertion space 31 between the tip portion inner peripheral surface and the outer end portion outer peripheral surface of the core member 30 of the joint body 11 is provided, the thickness of the resin pipe insertion space 31 is substantially the same as the thickness of the resin pipe 16 It has been set. コア部材30の外周面は内端部の外径よりも外端部の外径が小さくなる段差状に形成されており、その段差部分が係合面32となっている。 The outer peripheral surface of the core member 30 is formed in a stepped shape so that the outer diameter of the outer end than the outer diameter of the inner end portion is reduced, the stepped portion is in the engagement surface 32. この係合面32とコア部材30の内端面との継手本体11の軸線14方向への距離は、継手本体11内の第2当接面15と第1当接面13との前記軸線14方向への距離と略同一に形成されている。 Distance to the axis 14 direction of the joint body 11 and the inner end surface of the engagement surface 32 and the core member 30, the axis 14 direction of the second abutment surface 15 of the joint body 11 and the first abutment surface 13 It is substantially equal to the distance to. そして、図1に示すように、継手本体11に樹脂パイプ16が接続された際には、その先端が継手本体11内の第2当接面15に当接するとともに、コア部材30の係合面32に係合するようになっている。 Then, as shown in FIG. 1, when the resin pipe 16 is connected to the joint body 11 has its front end abuts against the second abutment surface 15 of the joint body 11, the engagement surface of the core member 30 It is adapted to engage the 32.
【0019】 [0019]
係合面32よりも内端側には一対の第1収容溝33が周設され、各第1収容溝33にはゴム材料製の断面円形状をなすシール手段としてのOリング34が嵌着されている。 Is first receiving groove 33 of the pair is circumferentially on the inner end side of the engagement surface 32, O-ring 34 is fitted as a seal means for forming a circular cross-section made of rubber material in the first receiving groove 33 It is. そして、継手本体11の基端部内周面に各Oリング34の外周面がそれぞれ密接されることにより、継手本体11の基端部内周面とコア部材30の内端部外周面との間がシールされるようになっている。 By the outer circumferential surface of the proximal end inner peripheral surface to each O-ring 34 of the joint body 11 is closely respectively, it is between the proximal inner peripheral surface and the inner end portion outer peripheral surface of the core member 30 of the joint body 11 It is adapted to be sealed. また、コア部材30の内端部外周面と継手本体11の基端部内周面との間には前記軸線14方向に均一の間隔を有する空隙35が設けられている。 Further, the gap 35 having a uniform interval in the axis 14 direction is provided between the proximal inner peripheral surface of the inner end portion outer peripheral surface and the fitting body 11 of the core member 30. この空隙35は継手本体11に接続された樹脂パイプ16に加わる曲げ応力による樹脂パイプ16の変形に追従して、継手本体11の軸線14と交差する方向へのコア部材30の動きを許容するためのものである。 The gap 35 is to follow the deformation of the resin pipe 16 by the bending stress applied to the resin pipe 16 connected to the joint body 11, to allow the movement of the core member 30 in a direction crossing the axis 14 of the joint body 11 belongs to. 従って、空隙35はコア部材30の内端部を継手本体11の基端部内に挿入するために必要な設計上の隙間よりも大きくなるように設定しなければならない。 Thus, the gap 35 must be set larger than the gap on the design required for inserting the inner end portion of the core member 30 in the proximal portion of the joint body 11. 具体的にはその空隙35は、好ましくは0.05〜0.5mm、さらに好ましくは0.1〜0.2mmに設定される。 Its air gap 35 in particular is preferably 0.05 to 0.5 mm, more preferably set to 0.1 to 0.2 mm.
【0020】 [0020]
この空隙35が0.05mm未満では、コア部材30の内端部外周面と継手本体11の基端部内周面との間がほぼ密接された状態となり、コア部材30がその内端部を介して継手本体11内に実質上固定される。 In this gap 35 is less than 0.05 mm, a state in which while is substantially close the proximal inner peripheral surface of the inner end portion outer peripheral surface and the fitting body 11 of the core member 30, the core member 30 via its inner end It is substantially fixed in the joint body 11 Te. このため、継手本体11に接続された樹脂パイプ16に対して曲げ応力が加わった際には、継手本体11の軸線14と交差する方向へのコア部材30の動きが抑制され、樹脂パイプ16のみが前記曲げ応力に応じて変形する。 Therefore, when a bending stress is applied to the resin pipe 16 connected to the joint body 11, the movement of the core member 30 in a direction crossing the axis 14 of the joint body 11 is suppressed, only the resin pipe 16 There is deformed in response to the bending stress. 従って、コア部材30の外端部外周面と樹脂パイプ16の端部内周面との間に隙間が生じ、この隙間を通じて漏水するおそれがある。 Therefore, a gap is formed between the outer end portion outer peripheral surface and the inner peripheral surface of an end portion of the resin pipe 16 of the core member 30, there is a risk of leakage through the gap. 一方、0.5mmを越えると、前記シールリング39によるコア部材30の内端部外周面と継手本体11の基端部内周面との間のシール状態を保持することが困難になり、空隙35を通じて漏水するおそれがある。 On the other hand, if it exceeds 0.5 mm, it becomes difficult to hold the sealing state between the inner end portion outer peripheral surface of the core member 30 by the seal ring 39 and the proximal inner peripheral surface of the joint body 11, the gap 35 there is a risk of leakage through. 加えて、継手本体11内へのコア部材30の仮固定が不十分となり、継手本体11内に樹脂パイプ16を挿入する際にはコア部材30にがたつきが生じ、接続し難くなる可能性がある。 In addition, the temporary fixing of the core member 30 into the fitting body 11 becomes insufficient, when inserting the plastic pipe 16 into the joint body 11 backlash occurs in the core member 30, it may become difficult to connect there is.
【0021】 [0021]
また、先端側のOリング34から係合面32までの距離(a)は、継手本体11内に挿入された樹脂パイプ16の先端が前記押出ピン20と当接し、その外端部が継手本体11の外周面から外方へ最大量突出したときの押出ピン20の樹脂パイプ当接部37から係合面32までの距離(b)よりも長く設定されている。 The distance from the distal end side of the O-ring 34 to the engagement surface 32 (a), the tip of the plastic pipe 16 inserted into the joint body 11 abuts with the extrusion pin 20, the outer end fitting body 11 is set longer than the distance (b) from the resin pipe abutment portion 37 of the ejector pin 20 when the maximum amount of projection outwardly until the engagement surface 32 from the outer peripheral surface of the. このため、樹脂パイプ16の先端が第2当接面15に当接せず、押出ピン20のテーパ面20aの先端と第2当接面15との間に位置したときでも、一対のOリング34によって継手本体11の基端部内周面とコア部材30の内端部外周面との間のシール状態が保持されるようになっている。 Therefore, the tip of the resin pipe 16 does not contact the second contact surface 15, even when located between the tip and the second contact surface 15 of the tapered surface 20a of the push-out pin 20, a pair of O-ring sealed state between the proximal inner peripheral surface and the inner end portion outer peripheral surface of the core member 30 of the joint body 11 is adapted to be held by 34.
【0022】 [0022]
前記係合面32よりも外端側は円筒状の筒部36となっており、その外径は樹脂パイプ16の内径と略同一に形成されている。 The outer end side of the engagement surface 32 has a cylindrical tubular portion 36, the outer diameter is substantially equal to the inner diameter of the plastic pipe 16. また、コア部材30の外端部外周面、つまり筒部36の外周面には継手本体11の軸線14方向に沿って一対の第2収容溝38が周設され、各第2収容溝38にはシール機構を構成するシールリング39が嵌着されている。 Also, the outer end portion outer peripheral surface of the core member 30, that is, the outer peripheral surface of the cylindrical portion 36 and the second receiving groove 38 of the pair along the axis 14 direction of the joint body 11 is circumferentially provided, in each of the second receiving groove 38 sealing ring 39 constituting the seal mechanism is fitted in. 図2及び図3に示すように、シールリング39には筒部36の外周面よりも径方向外側に突出する突出部39aが形成され、該突出部39aよりも外端側には筒部36の外周面と略面一に形成された外周面を有する平坦部39bが設けられている。 2 and 3, the sealing ring 39 protruding portion 39a that protrudes radially outward from the outer peripheral surface of the cylindrical portion 36 is formed, the cylindrical portion 36 on the outer end side of the projecting portion 39a flat portion 39b is provided having an outer peripheral surface and outer peripheral surface formed substantially flush of. そして、継手本体11に樹脂パイプ16が挿入接続されたときには、樹脂パイプ16の内周面に各シールリング39の外周面がそれぞれ密接されることにより、樹脂パイプ16の内周面と筒部36の外周面との間がシールされるようになっている。 When the plastic pipe 16 is inserted and connected to the joint body 11, by the outer peripheral surface of each seal ring 39 on the inner peripheral surface of the resin pipe 16 is closely respectively, the inner peripheral surface and the cylindrical portion of the plastic pipe 16 36 between the outer peripheral surface of the is adapted to be sealed.
【0023】 [0023]
前記継手本体11と、継手本体11に内嵌されるコア部材30と、継手本体11に挿入接続された樹脂パイプ16を抜け止め保持するためのロックリング28等とにより本実施形態の継手が構成されている。 The fitting body 11, a core member 30 which is fitted to the joint body 11, the joint of the present embodiment is constituted by a lock ring 28 for retaining hold plastic pipe 16 inserted connected to the joint body 11 or the like It is.
【0024】 [0024]
次に、前記継手の作用について以下に記載する。 Next, described below the operation of the joint.
さて、図2に示すような継手を組み立てる場合には、まず図3に示すように、継手本体11内にコア部材30を挿入する。 Now, when assembling the joint as shown in Figure 2, first, as shown in FIG. 3, inserting the core member 30 into the fitting body 11. このとき、継手本体11内の第1面取り部17がコア部材30の挿入案内の役割をし、コア部材30の内端面が継手本体11内の第1当接面13に当接するまで挿入する。 The first chamfered portion 17 of the joint body 11 has the role of the insertion guide of the core member 30 is inserted to the inner end surface of the core member 30 abuts against the first abutment surface 13 in the joint body 11. 次いで、スペーサ29が介装された一対のロックリング28を継手本体11内に挿入し、係止段部27に係止させる。 Then, insert the pair of lock ring 28 which spacers 29 are interposed in the joint body 11, engaged in the engaging step portion 27. そして、継手本体11の先端部内周面の雌ねじ部22に押し輪23の第2雄ねじ部24を螺合し、継手本体11の先端部に押し輪23を取付け、その先端面と係止段部27との間に一対のロックリング28を挟着する。 Then, screwed a second male screw portion 24 of the wheel 23 pushing the female threaded portion 22 of the distal end portion inner peripheral surface of the joint body 11, mounting the wheel 23 pushing the distal end of the joint body 11, the distal end surface and the locking stepped portion to sandwiched a pair of lock ring 28 between the 27.
【0025】 [0025]
次いで、継手本体11に樹脂パイプ16を接続する場合には、まず樹脂パイプ16の先端を樹脂パイプ挿入空間31に挿入する。 Then, when connecting the resin pipe 16 to the joint body 11 is first inserted the tip of the plastic pipe 16 in the plastic pipe insertion space 31. このとき、前記押し輪23の第2面取り部26が樹脂パイプ16の挿入案内の役割をし、樹脂パイプ16の端部にコア部材30の筒部36が内嵌される。 At this time, the second chamfered portion 26 of the push ring 23 to the role of the insertion guide of the resin pipe 16, the tubular portion 36 of the core member 30 to the end of the plastic pipe 16 is fitted into. そして、図4に示すように、樹脂パイプ16の端部がシールリング39を通過するときには、まずシールリング39の平坦部39bが最初に樹脂パイプ16に内挿され、続いて突出部39aが内挿される。 Then, as shown in FIG. 4, when the end portion of the resin pipe 16 is passed through the sealing ring 39 is inserted into First the resin pipe 16 is a flat portion 39b of the seal ring 39, inner followed protrusion 39a is It is inserted. 樹脂パイプ16を継手本体11の内奥側へさらに挿入すると、両ロックリング28の各規制片28bの先端が外方へ押圧されながら樹脂パイプ16にそれぞれ摺接される。 When the resin pipe 16 is further inserted into the innermost side of the joint body 11, the tip of the restricting piece 28b of the two locking rings 28 are respectively in sliding contact with the plastic pipe 16 while being pressed outwardly. このとき、樹脂パイプ16は各規制片28bの元に戻ろうとする力に基づく内方への付勢力に抗して継手本体11の内奥側へ挿入される。 At this time, the resin pipe 16 is inserted into the innermost side of the joint body 11 against the biasing force of the inwardly based on the force to return to the original respective regulating piece 28b.
【0026】 [0026]
図5に示すように、樹脂パイプ16を継手本体11の内奥側へさらに挿入すると、もう1つの第2収容溝38に嵌着されたシールリング39も同様に樹脂パイプ16に内挿されるとともに、樹脂パイプ16の先端が押出ピン20のテーパ面20aに当接する。 As shown in FIG. 5, when further inserted resin pipe 16 to the innermost side of the joint body 11, together with the interpolated similarly seal ring 39 which is fitted into another second receiving groove 38 in the plastic pipe 16 , the tip of the resin pipe 16 abuts against the tapered surface 20a of the extrusion pin 20. このテーパ面20aは内方に向かうほど縮径しているため、樹脂パイプ16によって側方から力を受けると、その力が径方向の力に変換され、押出ピン20の大径部21が環状凹部19b内を外方へ移動する。 Due to the reduced diameter as the tapered surface 20a is directed inward, when receiving a force from the side by a resin pipe 16, is converted the force to the force in the radial direction, the large-diameter portion 21 of the ejector pin 20 is annular to move within the recess 19b to the outside. このとき、押出ピン20の外端部が貫通孔18内に没入した状態から外方へ突出し、押出ピン20の外周面の赤色の着色が視認される。 At this time, the outer end portion of the ejector pin 20 protrudes from the retracted state in the through hole 18 to the outside, a red coloration of the outer peripheral surface of the ejector pin 20 is visible. そして、樹脂パイプ16をさらに内奥側へ押し込むにつれて押出ピン20は大径部21を介して徐々に外方へ移動し、樹脂パイプ16の先端が前記テーパ面20aの先端まで摺動したとき、押出ピン20の外端部の突出量は最大となる。 The push-out pin 20 as pushing the resin pipe 16 further into the innermost side is moved gradually into the outside through a large-diameter portion 21, when the tip of the plastic pipe 16 has been slid to the distal end of the tapered surface 20a, the amount of projection of the outer end portion of the ejector pin 20 is maximized.
【0027】 [0027]
続いて、図1に示すように、樹脂パイプ16の先端が継手本体11内の第2当接面15及びコア部材30の係合面32に当接するまで樹脂パイプ16を継手本体11の内奥側へさらに挿入する。 Subsequently, as shown in FIG. 1, the resin pipe 16 of the joint body 11 to the tip of the resin pipe 16 abuts against the second abutment surface 15 and the engagement surface 32 of the core member 30 in the joint body 11 inner back further inserted to the side. その後、二点鎖線で示すように、継手本体11に接続された樹脂パイプ16に曲げ応力が加わったときには、コア部材30は前記空隙35により樹脂パイプ16の変形に追従した動きが許容される。 Thereafter, as indicated by the two-dot chain line, when the bending stress is applied to the resin pipe 16 connected to the joint body 11, the core member 30 moves following up the deformation of the resin pipe 16 by the gap 35 is permitted. また、樹脂パイプ16に引き抜き力が作用したときには、両ロックリング28の各規制片28bの先端が樹脂パイプ16の外周面に食い込むことにより、樹脂パイプ16は継手本体11内に抜け止め保持される。 Further, when the force pulling the plastic pipe 16 is applied, the tip of the restricting piece 28b of the both lock ring 28 by biting into the outer peripheral surface of the resin pipe 16, the resin pipe 16 is held retained within the joint body 11 . そして、継手本体11に内嵌されたコア部材30にその抜け出し方向への力が作用したときには、前記係合面32が樹脂パイプ16の先端に係合することによりコア部材30の動きが規制される。 Then, when the exit force in the direction is applied to the core member 30 which is fitted into the joint body 11, the movement of the core member 30 is restricted by the engagement surface 32 is engaged with the distal end of the plastic pipe 16 that.
【0028】 [0028]
以上の実施形態によって発揮される効果について、以下に記載する。 The effects exerted by the above embodiments are described below.
・ 本実施形態の継手は、継手本体11にコア部材30が内嵌して構成されており、コア部材30の内端部外周面と継手本体11の基端部内周面との間には空隙35が設けられている。 - joint of the present embodiment is constituted by fitting the inner core member 30 to the joint body 11, the gap between the proximal inner peripheral surface of the inner end portion outer peripheral surface and the fitting body 11 of the core member 30 35 is provided. このため、継手本体11に接続された樹脂パイプ16に曲げ応力が加わったときには、コア部材30は前記空隙35により樹脂パイプ16の変形に追従して継手本体11の軸線14と交差する方向への動きが許容され、樹脂パイプ16の変形を防ぐことができる。 Therefore, when a bending stress is applied to the resin pipe 16 connected to the joint body 11, the core member 30 in a direction crossing the axis 14 of the joint body 11 to follow the deformation of the resin pipe 16 by the air gap 35 motion is allowed, it is possible to prevent deformation of the resin pipe 16. このとき、樹脂パイプ16の端部内周面に各シールリング39の外周面がそれぞれ密接された状態が維持されるため、コア部材30の外周面と樹脂パイプ16の内周面との間の隙間をなくして漏水を防止することができる。 At this time, since the state where the outer peripheral surface is intimately each of seal rings 39 to inner peripheral surface of an end portion of the resin pipe 16 is maintained, the gap between the outer peripheral surface and the inner peripheral surface of the resin pipe 16 of the core member 30 it is possible that the lost and to prevent leakage.
【0029】 [0029]
・ また、継手本体11内の第2当接面15より僅かに先端側には貫通孔18が設けられ、この貫通孔18には押出ピン20が挿通支持されている。 It also is slightly distal to the second abutment surface 15 of the joint body 11 is provided with a through-hole 18, the extrusion pin 20 is inserted and supported in the through hole 18. そして、継手本体11内に樹脂パイプ16を挿入する際には、樹脂パイプ16の先端が押出ピン20のテーパ面20aに当接することにより、押出ピン20の外端部が貫通孔18から突出するようになっている。 Soshite, the joint body 11 inner second resin pipe 16 wo to insert rhino second tooth, resin pipe 16 field tip moth extrusion pin 20 mounting a tapered surface 20a similar contact to the ancient capital Niyori, extrusion pin 20 field outside end part moth through-hole 18 scolded protruding It has become way. このため、押出ピン20の外端部が継手本体11の外周面から外方へ突出しているか否かによって樹脂パイプ16の挿入状態を容易に視認することができる。 Therefore, it is possible to the outer end of the push-out pin 20 is easily visually recognize the inserted state of the resin pipe 16 depending on whether projects outwardly from the outer peripheral surface of the joint body 11.
【0030】 [0030]
・ さらに、コア部材30の先端側のOリング34から係合面32までの距離(a)は、押出ピン20の樹脂パイプ当接部37から係合面32までの距離(b)よりも長く設定されている。 · In addition, the distance from the O-ring 34 on the distal end side of the core member 30 until the engagement surface 32 (a) is longer than the distance from the plastic pipe abutment portion 37 of the push-out pin 20 until the engaging surface 32 (b) It has been set. このため、樹脂パイプ16の先端が押出ピン20の樹脂パイプ当接部37と第2当接面15との間で止まっているときでも、一対のOリング34によって継手本体11の基端部内周面とコア部材30の内端部外周面との間のシール状態が保持され、両者間の空隙35を通じての漏水を防止することができる。このため、樹脂パイプ16の先端が押出ピン20の樹脂パイプ当接部37と第2当接面15との間で止まっているときでも、一対のOリング34によって継手本体11の基端部内周is retained sealing state between the face and the inner end portion outer peripheral surface of the core member 30, it is possible to prevent water leakage through the gap 35 therebetween.
【0031】 [0031]
・ 前記第2収容溝38に嵌着されたシールリング39には、コア部材30の筒部36の外周面と略面一に形成された外周面を有する平坦部39bが設けられ、該平坦部39bよりも内端側には突出部39aが設けられている。 · Wherein the second receiving groove 38 a seal ring 39 which is fitted to the flat portion 39b is provided having an outer peripheral surface and outer peripheral surface formed substantially flush of the cylindrical portion 36 of the core member 30, the flat part protrusion 39a is provided on the inner end side from 39 b. このため、樹脂パイプ16の先端がシールリング39の突出部39aに突き当たるときには、既に同シールリング39の平坦部39bが樹脂パイプ16に内挿された状態にある。 Therefore, when the tip of the plastic pipe 16 abuts against the projection section 39a of the seal ring 39, it is already state flat portion 39b of the seal ring 39 is inserted into the resin pipe 16. 従って、樹脂パイプ16の先端が斜めに切断され、その先端部分がシールリング39の突出部39aに当たった状態から樹脂パイプ16をさらに内奥側へ押し込んだとしても、第2収容溝38からのシールリング39の抜け出しを効果的に抑制することができる。 Shitagatte, resin pipe 16 field tip moth diagonally similar cut, the tip portion moth seal ring 39 field protruding part 39a two-hit other state scolded resin pipe 16 wo further innermost side fart pushed da Toshite mourning, the second receiving groove 38 scolded Roh escape of the sealing ring 39 can be effectively suppressed.
【0032】 [0032]
・ 継手本体11の軸線14方向に沿って並んで配置される一対のシールリング39によって樹脂パイプ16の端部の内周面とコア部材30の筒部36の外周面との間をシールするようにしているので、高いシール性を発揮することができる。 By - fitting a pair of seal rings 39 that are arranged along the axis 14 direction of the main body 11 so as to seal between the outer peripheral surface of the cylindrical portion 36 of the inner peripheral surface and the core member 30 of the end portion of the resin pipe 16 since the have to, it is possible to exert a high sealing properties.
【0033】 [0033]
・ 押出ピン20の外周面は赤色に着色されているため、継手本体11の外周面から外方に突出した際の押出ピン20の外端部を容易に視認することができる。 The outer peripheral surface of-the extrusion pin 20 because it is colored in red, it is possible to easily visually recognize the outer end of the ejector pin 20 when projecting outward from the outer peripheral surface of the joint body 11.
【0034】 [0034]
なお、本実施形態は、次のように変更して具体化することも可能である。 The present embodiment can also be embodied in the following manner.
・ コア部材30の先端側のOリング34から係合面32までの距離(a)が、押出ピン20の前記軸線14方向外端から係合面32までの距離よりも長く設定される構成を採用してもよい。 And distance from the distal end side of the O-ring 34 of the core member 30 until the engagement surface 32 (a) is a configuration that is set longer than the distance from the axis 14 direction outer end of the push-out pin 20 until the engaging surface 32 it may be adopted. このように構成した場合、押出ピン20の外端部が継手本体11の外周面から僅かに外方に突出した状態を以って樹脂パイプ16の接続を完了した場合でも、コア部材30の内端部外周面と継手本体11の基端部内周面との間のシール性能を確実に維持することができる。 In such a configuration, even when the outer end of the push-out pin 20 has completed the connection of the resin pipe 16 while protruding slightly outward from the outer peripheral surface I following the joint body 11, of the core member 30 the sealing performance between the proximal inner peripheral surface of the end portion outer peripheral surface and the fitting body 11 can be reliably maintained.
【0035】 [0035]
・ 押出ピン20の内端部の形状をかまぼこ状、三角柱状等に変更してもよい。 - the shape of the inner end portion of the ejector pin 20 semicylindrical shape, may be changed to a triangular prism shape or the like.
・ コア部材30の内端部を継手本体11の軸線14方向外方に向かうに従い僅かに縮径するテーパ状に形成してもよい。 - the inner end portion of the core member 30 may be formed in a tapered shape slightly reduced in diameter toward the axis 14 outwardly of the joint body 11. すなわち、前記空隙35は継手本体11の軸線14方向外方に向かうに従い僅かに拡大される。 That is, the gap 35 is slightly enlarged toward the axis 14 outwardly of the joint body 11. このように構成した場合、継手本体11に接続された樹脂パイプ16に曲げ応力が加わったときには、コア部材30は樹脂パイプ16の変形に追従できる許容範囲が大きくなり、樹脂パイプ16の変形をさらに効果的に防ぐことができる。 In such a structure, when the bending stress is applied to the resin pipe 16 connected to the joint body 11, the core member 30 becomes large tolerance can follow the deformation of the resin pipe 16, further deformation of the resin pipe 16 it can be effectively prevented.
【0036】 [0036]
・ 本実施形態の継手の保持手段を次のように構成してもよい。 · Holding means of the joint of the present embodiment may be configured as follows.
即ち、継手本体11の先端部内周面には、継手本体11の軸線14方向外方に向かうに従い拡径するテーパ面が形成される。 That is, the tip end inner peripheral surface of the joint body 11, a tapered surface whose diameter increases toward the axis 14 outwardly of the joint body 11 is formed. 継手本体11と押し輪23との間には保持手段としての前記軸線14方向に延びる切り割りが形成され、その外周面に継手本体11内のテーパ面に対応するテーパ面を有する押圧リングが介装される。 Between the joint body 11 and the press wheels 23 are formed cut-split extending in the axis 14 direction of the holding means, the pressing ring is interposed with a tapered surface corresponding to the tapered surface in the joint body 11 on the outer circumferential surface It is.
【0037】 [0037]
継手に樹脂パイプ16を接続するときには、樹脂パイプ16を継手本体11内に挿入した後、スパナ等を用いて押し輪23を継手本体11に締付ける。 When connecting the resin pipe 16 to the joint is tightened after insertion of the resin pipe 16 into the joint body 11, the wheel 23 press using a spanner or the like to the joint body 11. このとき、押圧リングは、継手本体11内のテーパ面によってガイドされることにより縮径しながら継手本体11内に押し込まれ、押圧リングの内周面が樹脂パイプ16の外周面に圧接することにより、樹脂パイプ16は継手本体11内に抜け止め保持される。 At this time, the pressing ring, while reduced in diameter by being guided by the tapered surface in the coupling body 11 is pushed into the joint body 11, by the inner circumferential surface of the pressing ring is pressed against the outer peripheral surface of the plastic pipe 16 , the resin pipe 16 is held retained within the joint body 11.
【0038】 [0038]
・ コア部材30の筒部36に設けられた各第2収容溝38に嵌着されるシールリング39の形状を断面円形状、断面楕円形状等に変更してもよい。 Core member 30 of the cylindrical portion 36 to provided a respective second receiving grooves 38 shape of the seal ring 39 is fitted into the circular cross-section, may be changed to an elliptical cross-sectional shape.
・ 継手本体11の基端部内周面にコア部材30の内端部外周面との間をシールするシール手段を設ける構成を採用してもよい。 - between an inner end portion outer peripheral surface of the core member 30 in the proximal inner peripheral surface of the joint body 11 may adopt a configuration in which the sealing means to seal the. すなわち、継手本体11の基端部内周面に一対の第1収容溝33が周設されるとともに、各第1収容溝33にはOリング34が嵌着される。 That is, the first receiving groove 33 of the pair in the proximal inner peripheral surface of the joint body 11 is circumferentially, each first accommodating groove 33 O-ring 34 is fitted.
【0039】 [0039]
・ コア部材30の外端部外周面と樹脂パイプ16の端部内周面との間をシールするシールリング39の数は一対に限定されるものでなく、1つでもよいし、3つ以上でもよい。 · The number of seal rings 39 to seal between the outer end portion outer peripheral surface of the core member 30 and the inner peripheral surface of an end portion of the resin pipe 16 is not limited to a pair, may be one or be three or more good.
【0040】 [0040]
・ 押出ピン20の外周面を黄色、緑色等の赤色以外の色で着色してもよい。 · The outer peripheral surface of the ejector pin 20 yellow, may be colored in red other colors green, or the like.
さらに、前記実施形態より把握できる技術的思想について以下に記載する。 Furthermore, described below technical idea understood from the embodiment.
・ 前記コア部材はその内端部外周面と継手本体の基端部内周面との間に設けられたシール手段によって継手本体内に仮固定されている請求項1から請求項3のいずれか一項に記載の継手。 - said core member in one any of claims 1, which is temporarily fixed to the fitting body by a sealing means provided between the proximal end inner peripheral surface of the inner end outer peripheral surface and the fitting body of claim 3 fitting according to claim. この構成によれば、コア部材を継手本体に予め挿入接続しておくことができる。 According to this configuration, it is possible to previously inserted and connected core member to the joint body.
【0041】 [0041]
・ 前記コア部材に設けられたシール機構にはシールリングが用いられ、該シールリングには外端部外周面よりも径方向外側に突出する突出部が形成され、該突出部よりも外端側には外端部外周面と略面一に形成された外周面を有する平坦部が設けられている請求項1から請求項3のいずれか一項に記載の継手。 - wherein the sealing mechanism provided in the core member seal ring is used, the said sealing ring protrusion protruding radially outward of the outer end portion outer peripheral surface is formed, the outer end side of the projecting portion fittings according to claims 1, flat portion having an outer peripheral surface formed substantially flush with the outer end portion outer peripheral surface is provided on any one of claims 3 to. この構成によれば、継手本体に樹脂パイプを接続する際に、シール機構を確実に維持することができる。 According to this arrangement, when connecting the resin pipe joint body, it is possible to maintain the sealing mechanism reliably.
【0042】 [0042]
・ 前記継手本体の内周部には係止段部が形成され、先端部には押し輪が螺合接続され、係止段部と押し輪の先端面との間には樹脂パイプを抜け止め保持するための保持手段が介装されている請求項1から請求項3のいずれか一項に記載の継手。 - wherein the inner peripheral portion of the joint main body locking stepped portion is formed, it is wheel threaded connection push the distal end portion, retaining the resin pipe between the step portion and the press wheel tip surface of joint according to any one of claims 1 to 3, holding means for holding is interposed. この構成によれば、樹脂パイプを継手本体内に容易に挿入することができるとともに、樹脂パイプの抜け止めを効果的に行うことができる。 According to this configuration, it is possible to easily insert the resin pipe into the fitting body, it is possible to perform the retaining resin pipe effectively.
【0043】 [0043]
【発明の効果】 【Effect of the invention】
以上詳述したように、この発明によれば、次のような効果を奏する。 As described above in detail, according to the present invention, the following effects.
請求項1に記載の発明の継手によれば、樹脂パイプの変形を防ぎ、コア部材の外周面と樹脂パイプの内周面との間の隙間をなくして漏水を防止することができる。 According to the joint of the invention according to claim 1 to prevent deformation of the plastic pipe, it is possible to prevent water leakage by eliminating the gap between the outer peripheral surface and the inner circumferential surface of the plastic pipe of the core member.
【0044】 [0044]
請求項2に記載の発明の継手によれば、請求項1に記載の発明の効果に加えて、樹脂パイプの挿入状態を容易に視認することができる。 According to the joint of the invention according to claim 2, in addition to the effect of the invention of claim 1, to easily view the inserted state of the resin pipe.
請求項3に記載の発明の継手によれば、請求項1又は請求項2に記載の発明の効果に加えて、コア部材の内端部外周面と継手本体の基端部内周面との間のシール性能を確実に維持することができる。 According to the joint of the invention according to claim 3, in addition to the effect of the invention according to claim 1 or claim 2, between the inner end portion outer peripheral surface and the base end portion peripheral surface of the joint body of the core member it is possible to maintain the sealing performance reliably.
【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS
【図1】 実施形態の継手に樹脂パイプを接続した状態を示す部分破断側面図。 Figure 1 is a partial sectional side view showing a state of connecting a plastic pipe to the joint of the embodiment.
【図2】 継手を示す部分破断側面図。 Figure 2 is a partial sectional side view showing the joint.
【図3】 継手を示す分解側断面図。 Figure 3 is an exploded side cross-sectional view showing the joint.
【図4】 継手本体内に樹脂パイプを挿入し始めた状態の部分破断側面図。 Figure 4 is a partial sectional side view of a state in which began to insert the resin pipe into the fitting body.
【図5】 樹脂パイプの先端が押出ピンに当接した状態を示す部分破断側面図。 Figure 5 is a partial sectional side view of the distal end of the plastic pipe indicates contact with the ejector pin.
【符号の説明】 DESCRIPTION OF SYMBOLS
11…継手本体、14…軸線、15…当接面としての第2当接面、16…樹脂パイプ、18…貫通孔、20…押出ピン、28…保持手段としてのロックリング、30…コア部材、32…係合面、34…シールリングとしてのOリング、35…空隙、37…樹脂パイプ当接部、39…シール機構を構成するシールリング。 11 ... fitting body, 14 ... axis, 15 ... second contact surface of the abutment surface, 16 ... resin pipe, 18 ... through hole, 20 ... extrusion pin 28 ... lock ring as the holding means, 30 ... core member , 32 ... engaging surface, 34 ... O-ring as a sealing ring, 35 ... gap, 37 ... resin pipe abutment portion, 39 ... seal ring constituting the seal mechanism.

Claims (3)

  1. 筒状をなし、基端部には管体が接続され、先端部には樹脂パイプが挿入されて接続されるとともに、中央部内周面は基端部の内径よりも先端部の内径が大きくなる段差状に形成され、その段差部分に樹脂パイプの先端が当接される当接面が設けられた継手本体と、略円筒状をなし、内端部は継手本体の基端部内に挿着され、外端部は継手本体の先端部内に位置し、中央部外周面は内端部の外径よりも外端部の外径が小さくなる段差状に形成され、その段差部分に樹脂パイプの先端が係合される係合面が設けられ、内端部外周面と継手本体の基端部内周面との間には両者間をシールするシール手段が設けられるとともに、外端部外周面には樹脂パイプ内周面との間をシールするシール機構が設けられたコア部材と、継手本体の先端部に設けられ A tubular shape, the proximal end portion is connected to the tube, with the resin pipe is connected is inserted into the distal portion, the central inner peripheral surface is larger inner diameter of the distal end portion than the inner diameter of the proximal portion is formed in a stepped shape, and the fitting body for abutment surface is provided with the tip of the resin pipe is abutting on the stepped portion, a substantially cylindrical shape, the inner end portion is inserted into the proximal end portion of the fitting body , the outer end portion is located in the distal end portion of the joint body, the central portion outer peripheral surface is formed in a stepped shape so that the outer diameter of the outer end than the outer diameter of the inner end portion is reduced, the tip of the plastic pipe to the step portion There engagement surface is provided to be engaged, together with sealing means for sealing between them is provided between the inner end portion outer peripheral surface and the base end portion peripheral surface of the joint body, the outer end portion outer peripheral surface a core member which sealing mechanism is provided to seal between the plastic pipe inner peripheral surface, provided at the distal end portion of the joint body 樹脂パイプを抜け止め保持するための保持手段とを備え、前記コア部材の内端部外周面と継手本体の基端部内周面との間には、樹脂パイプに加わる曲げ応力による変形に追従して継手本体の軸線と交差する方向へのコア部材の動きを許容する空隙が設けられていることを特徴とする継手。 And a holding means for holding retaining the resin pipe, between the inner end portion outer peripheral surface and the base end portion peripheral surface of the joint body of the core member, following the deformation by bending stress applied to the resin pipe joint, characterized in that the air gap is provided to permit movement of the core member in the direction crossing the axis of the joint body Te.
  2. 前記継手本体の当接面の近傍位置には継手本体の軸線と直交する方向に延びる貫通孔が透設され、該貫通孔には継手本体の先端部から挿入された樹脂パイプが当接することにより継手本体の外周面から突出して視認できるような押出ピンが挿通支持されている請求項1に記載の継手。 Wherein the vicinity of the contact surface of the joint body through-hole extending in a direction perpendicular to the axis of the fitting body is Toru設, by a resin pipe inserted from the distal end portion of the fitting body abuts on the through hole fitting according to claim 1, extrusion pin as visible protruding from the outer peripheral surface of the joint body is inserted and supported.
  3. 前記コア部材の内端部が継手本体の基端部内に挿着された状態で、コア部材のシール手段から係合面までの距離は、継手本体の当接面から押出ピンの樹脂パイプ当接部までの距離より長くなるように設定されている請求項1又は請求項2に記載の継手。 In a state in which the inner end portion of the core member is inserted into the proximal end portion of the fitting body, the distance from the sealing means of the core member to the engagement surface, the contact surface from the ejector pin plastic pipe abutment of the joint body fitting according to claim 1 or claim 2 is set to be longer than the distance to the part.
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