JP4428621B2 - Incore - Google Patents

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JP4428621B2
JP4428621B2 JP2003380036A JP2003380036A JP4428621B2 JP 4428621 B2 JP4428621 B2 JP 4428621B2 JP 2003380036 A JP2003380036 A JP 2003380036A JP 2003380036 A JP2003380036 A JP 2003380036A JP 4428621 B2 JP4428621 B2 JP 4428621B2
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resin pipe
joint
peripheral surface
core
cylindrical portion
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JP2005140304A (en
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真也 山田
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ONDA MFG.CO.,LTD.
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ONDA MFG.CO.,LTD.
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Description

本発明は、水道配管、冷温水配管、床暖房、ロードヒーティング等に使用される樹脂パイプ用の継手において、樹脂パイプの端部に内挿されるインコアに関するものである。   The present invention relates to an in-core inserted into an end portion of a resin pipe in a joint for a resin pipe used for water pipes, cold / hot water pipes, floor heating, load heating, and the like.

従来よりこの種のインコアとして、以下に示すようなものが知られている（例えば、特許文献１参照）。このインコアは、流体管としての樹脂パイプの端部の内周面に挿入される。そして、インコアが内周面に内挿された樹脂パイプはパッキンを装着した継手本体の受口部に水密に嵌入される。このインコアは薄肉円筒形に形成され、所定の間隔で周方向に間隙が設けられるとともに、半径方向に弾性縮径可能となっている。このように構成されることにより、インコアの外径に比べ小さい内径の樹脂パイプに対してインコアを挿入する際には、縮径させることにより容易に挿入することができる。またインコアは、一方の端部に拡径された鍔部と他方の端部に外径が徐々に縮小する小径部とで構成されているため、樹脂パイプにインコアを挿入する際には鍔部がパイプの端部に当接するまで挿入される。
特開２００１−２１０７５号公報（第２頁、第３頁及び図３） Conventionally, as this type of in-core, the following are known (for example, see Patent Document 1). This in-core is inserted into the inner peripheral surface of the end portion of the resin pipe as a fluid pipe. And the resin pipe in which the in-core was inserted in the internal peripheral surface is water-tightly inserted in the opening part of the coupling main body equipped with packing. The in-core is formed in a thin cylindrical shape, is provided with a gap in the circumferential direction at a predetermined interval, and can be elastically reduced in the radial direction. With this configuration, when the incore is inserted into a resin pipe having an inner diameter smaller than the outer diameter of the incore, the incore can be easily inserted by reducing the diameter. Moreover, since the in-core is composed of a flange portion whose diameter is enlarged at one end portion and a small-diameter portion whose outer diameter is gradually reduced at the other end portion, when inserting the in-core into the resin pipe, the flange portion Is inserted until it contacts the end of the pipe.
Japanese Patent Laid-Open No. 2001-21075 (second page, third page, and FIG. 3)

ところが、上記従来のインコアにおいては、作業者はインコアの筒部を縮径させながら鍔部が樹脂パイプの端部に当接するまで挿入するという煩わしい作業をしなければならなかった。そのため作業者は作業を簡単にするためにインコアの小径部の先端のみを樹脂パイプの端部に差し込み、鍔部側からハンマー等で叩きこむという作業を行っていた。こうした場合、インコアは樹脂パイプの内周面において樹脂パイプを拡径しようとする力を常に働かせているため、間隙の両側に形成されるエッジ部が樹脂パイプ内周面を傷付ける。その結果、継手の使用時に高い圧力がパイプ内部に加わった場合には、傷付き部分から損傷が更に広がるおそれがあるという問題があった。   However, in the above-described conventional in-core, the operator has to perform a troublesome operation of inserting until the collar portion comes into contact with the end of the resin pipe while reducing the diameter of the cylindrical portion of the in-core. Therefore, in order to simplify the work, the operator has inserted only the tip of the small diameter portion of the in-core into the end of the resin pipe and struck it with a hammer or the like from the flange side. In such a case, since the in-core always applies a force for expanding the diameter of the resin pipe on the inner peripheral surface of the resin pipe, the edge portions formed on both sides of the gap damage the inner peripheral surface of the resin pipe. As a result, when a high pressure is applied to the inside of the pipe when the joint is used, there is a problem that damage may further spread from the damaged portion.

本発明は、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。その目的とするところは、樹脂パイプに内挿する際に、樹脂パイプ内周面に傷を付けることを抑制することができるインコアを提供することにある。   The present invention has been made paying attention to such problems existing in the prior art. The purpose is to provide an in-core that can suppress damage to the inner peripheral surface of the resin pipe when inserted into the resin pipe.

上記の目的を達成するために、請求項１〜３に記載の発明のインコアは、筒部と、その一端に設けられた鍔部とを備え、樹脂パイプの端部に内挿され、内挿された状態の樹脂パイプが筒状をなす継手に嵌入され、その状態で継手内に嵌着される環状のシールリングにより、樹脂パイプの外周面と継手の内周面との間で継手内を流通する液体のシールを行うように構成されたインコアであって、前記筒部及び鍔部は、ばね性を有する金属材料で形成され、前記筒部にはその軸線方向と交差する方向に延びる所定間隔の隙間が設けられるとともに、拡縮径可能に構成されている。 In order to achieve the above object, the in-core according to any one of claims 1 to 3 includes a cylindrical portion and a flange portion provided at one end thereof, and is inserted into an end portion of the resin pipe. The resin pipe in the formed state is fitted into a cylindrical joint, and the annular seal ring that is fitted in the joint in that state is used to move the inside of the joint between the outer peripheral surface of the resin pipe and the inner peripheral surface of the joint. An in-core configured to seal a flowing liquid, wherein the cylindrical portion and the flange portion are formed of a metal material having a spring property, and the cylindrical portion extends in a direction intersecting with an axial direction thereof. An interval gap is provided, and the diameter can be increased or decreased .

請求項１に記載の発明のインコアは、前記隙間は波状に延びるように構成されていることを要旨とする。
請求項２に記載の発明のインコアは、前記鍔部は、板材の一側部を他側部に重ね合わせて円環状に構成されるとともに、一側部の側縁は前記筒部の軸線方向と交差する方向に延びるように構成されていることを要旨とする。 Incore the first aspect of the present invention, prior SL gap and gist that it is configured to extend in a wave shape.
Incore the invention described in claim 2, the front Kitsuba section, with one side of the plate material superimposed on the other side are configured in a ring shape, the side edges of one side the axis of the cylindrical portion The gist is that it is configured to extend in a direction crossing the direction.

請求項３に記載の発明のインコアは、前記鍔部は、板材の一側面と他側面とを突き合せて円環状に構成されるとともに、突き合せ部は前記筒部の軸線方向と交差する方向に延びるように構成されていることを要旨とする。 Incore the invention described in claim 3, the front Kitsuba portion, while being configured annularly abutting the one side and the other side of the plate member, the butting portion intersecting the axial direction of the cylindrical portion The gist is that it is configured to extend in the direction.

（作用）
請求項１に記載の発明のインコアによれば、筒部にはその軸線方向と交差する方向に所定間隔の隙間が設けられており、インコアを樹脂パイプに内挿する際には隙間の両側に形成される端縁のエッジ部が樹脂パイプの内周面に対して軸線方向と交差する方向に広い面積で摺接する。このため、エッジ部に対する樹脂パイプの内周面の抵抗が大きくエッジ部は角がとれたり、丸くなったり、小さくなったりする。従って、樹脂パイプの内周面に傷が付くことを抑制することができる。 (Function)
According to the incore of the first aspect of the present invention, the cylindrical portion is provided with a gap having a predetermined interval in a direction intersecting the axial direction thereof, and when the incore is inserted into the resin pipe, on both sides of the gap. The edge part of the edge formed is slidably contacted with the inner peripheral surface of the resin pipe in a direction crossing the axial direction with a wide area. For this reason, the resistance of the inner peripheral surface of the resin pipe with respect to the edge portion is large, and the edge portion is rounded, rounded, or small. Therefore, it is possible to suppress damage to the inner peripheral surface of the resin pipe.

請求項２に記載の発明のインコアによれば、鍔部は、板材の一側部を他側部に重ね合わせて円環状に構成されるとともに、鍔部の一側部の側縁は筒部の軸線方向と交差する方向に延びている。このため、インコアを内挿した樹脂パイプを継手内に嵌入する際に、樹脂パイプより突出した鍔部の一側縁のエッジ部が継手の内周面に摺接し、エッジ部に対する継手の内周面の抵抗が大きくエッジ部は角がとれたり、丸くなったり、小さくなったりする。従って、環状のシールリングに傷を付けることを抑制することができる。 According to the in-core of the invention described in claim 2 , the flange portion is formed in an annular shape by superimposing one side portion of the plate material on the other side portion, and the side edge of the one side portion of the flange portion is a cylindrical portion. It extends in a direction intersecting with the axial direction of. For this reason, when inserting the resin pipe into which the in-core is inserted into the joint, the edge part of the one side edge protruding from the resin pipe is in sliding contact with the inner peripheral surface of the joint, and the inner periphery of the joint with respect to the edge part The resistance of the surface is large, and the edge portion is rounded, rounded, or small. Therefore, damage to the annular seal ring can be suppressed.

請求項３に記載の発明のインコアによれば、鍔部は、板材の一側面と他側面とを突き合せて円環状に構成されるとともに、突き合せ部は筒部の軸線方向と交差する方向に延びるように構成されている。このため、インコアを内挿した樹脂パイプを継手内に挿入する際に、樹脂パイプより突出した鍔部の側縁のエッジ部が継手の内周面に摺接し、エッジ部に対する継手の内周面の抵抗が大きくエッジ部は角がとれたり、丸くなったり、小さくなったりする。従って、環状のシールリングに傷を付けることを抑制することができる。 According to the in-core of the invention described in claim 3 , the flange portion is configured in an annular shape by butting one side surface and the other side surface of the plate material, and the butting portion intersects the axial direction of the cylindrical portion. It is comprised so that it may extend. For this reason, when inserting the resin pipe into which the in-core is inserted into the joint, the edge portion of the side edge of the flange protruding from the resin pipe is in sliding contact with the inner peripheral surface of the joint, and the inner peripheral surface of the joint with respect to the edge portion. The resistance of the edge is large, and the edge portion is rounded, rounded, or small. Therefore, damage to the annular seal ring can be suppressed.

本発明によれば、次のような効果を発揮することができる。
請求項１に記載の発明のインコアによれば、インコアを樹脂パイプに内挿する際に樹脂パイプの内周面に傷を付けることを抑制することができる。 According to the present invention, the following effects can be exhibited.
According to the incore of the first aspect of the invention, it is possible to suppress damage to the inner peripheral surface of the resin pipe when the incore is inserted into the resin pipe.

請求項２及び請求項３に記載の発明のインコアによれば、インコアを内挿した樹脂パイプを継手内に嵌入する際に、樹脂パイプの端部より突出した鍔部が継手内に嵌着された環状のシールリングに傷を付けることを抑制することができる。 According to-core of the invention described in claim 2 and claim 3, fitting the interpolated resin pipe Lee Nkoa when fitted into the fitting flange portion projecting from an end of the resin pipe within the joint It is possible to suppress damage to the formed annular seal ring.

以下、本発明の実施形態につき、図面を用いて詳細に説明する。
図１（ａ）に示すように、樹脂パイプ１１はポリオレフィン（架橋ポリエチレン、ポリブテン等）等の合成樹脂により円筒状に形成され、水道の配管等に使用される。樹脂パイプ１１の端面１２は、樹脂パイプ１１をその軸線とほぼ直交するように切断されて形成されている。樹脂パイプ１１は製造方法や材質により、外径、内径及び肉厚にばらつきがあり、公差が金属パイプに比べ大きく規定されている。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown to Fig.1 (a), the resin pipe 11 is formed in cylindrical shape with synthetic resins, such as polyolefin (crosslinked polyethylene, polybutene, etc.), and is used for piping of a water supply. The end surface 12 of the resin pipe 11 is formed by cutting the resin pipe 11 so as to be substantially orthogonal to the axis thereof. The resin pipe 11 varies in outer diameter, inner diameter, and wall thickness depending on the manufacturing method and material, and the tolerance is defined larger than that of the metal pipe.

図１（ａ）〜（ｃ）に示すように、インコア１３は、ばね性を有する金属材料製の板材１３ａを曲げ加工することによって形成され、円筒状をなす筒部１４と、その一端に筒部１４側へ折り返して形成された円環状の鍔部１５とから構成されている。ばね性を有する金属製材料の板材１３ａは、ステンレス鋼（ＳＵＳ）のうち板厚が０．２〜０．５ｍｍ、種類がＳＵＳ３０３、ＳＵＳ３０４、ＳＵＳ３１６等であることが好ましい。このインコア１３を製作するには、第１工程において前記板材１３ａをプレス加工にて図１（ｃ）に示す形状に抜き加工を行う。この場合、板材１３ａの一側面１８ａと他側面１８ｂとは波状に加工され、円筒状に曲げ加工して筒部１４を形成したとき、一側面１８ａと他側面１８ｂとの間に一定の隙間１８が形成されるようになっている。板材１３ａの一端部は幅広に加工され、円筒状に曲げ加工したとき鍔部１５を形成するようになっている。第２工程においては、第１工程で抜き加工された板材１３ａを円筒状に曲げる曲げ加工を行う。第３工程においては、円筒の一端を他端側に折り返して鍔部１５を形成する。前記筒部１４の外径は、樹脂パイプ１１の内径よりもわずかに大きく設定されており、他端側に向かうに従い徐々に外径が縮小するテーパ状に形成されている。   As shown in FIGS. 1A to 1C, the in-core 13 is formed by bending a plate material 13a made of a metal material having a spring property, and a cylindrical portion 14 having a cylindrical shape and a cylinder at one end thereof. It is composed of an annular flange 15 formed by folding back toward the portion 14 side. The plate material 13a made of a metal material having springiness is preferably made of stainless steel (SUS) having a plate thickness of 0.2 to 0.5 mm and a type of SUS303, SUS304, SUS316, or the like. In order to manufacture the in-core 13, in the first step, the plate material 13a is punched into the shape shown in FIG. In this case, the one side surface 18a and the other side surface 18b of the plate member 13a are processed into a wave shape, and when the cylindrical portion 14 is formed by bending into a cylindrical shape, a certain gap 18 is formed between the one side surface 18a and the other side surface 18b. Is to be formed. One end portion of the plate material 13a is processed to be wide, and the flange portion 15 is formed when bent into a cylindrical shape. In the second step, bending is performed to bend the plate material 13a punched in the first step into a cylindrical shape. In the third step, the flange portion 15 is formed by folding one end of the cylinder to the other end side. The outer diameter of the cylindrical portion 14 is set to be slightly larger than the inner diameter of the resin pipe 11 and is formed in a tapered shape in which the outer diameter gradually decreases toward the other end side.

図２（ａ）、（ｃ）に示すように、筒部１４には、その軸線方向に延び、一定間隔で波状をなす隙間１８が形成されている。すなわち、隙間１８は１．５〜２．０ｍｍの範囲で軸線方向に均一に設定されており、筒部１４は径方向に０．３〜０．７ｍｍの縮径が可能である。筒部１４が最も縮径した際には、一側面１８ａと他側面１８ｂとが当接し、それ以上の縮径は規制される。この隙間１８の波の振幅及びピッチは任意に設定される。また、図２（ａ）、（ｂ）に示すように、前記円環状の鍔部１５は、板材１３ａの一側部１６ａを他側部１６ｂに重ね合わせるとともに、一側部１６ａの側縁は筒部１４の軸線方向と交差する方向に延びるように形成されている。或いは、図２（ｃ）、（ｄ）に示すように、板材１３ａの一側面１７ａと他側面１７ｂとを突き合わせるとともに、突き合せ部１７が筒部１４の軸線方向と交差する方向に延びるように形成されている。   As shown in FIGS. 2A and 2C, the cylindrical portion 14 is formed with a gap 18 that extends in the axial direction and has a wave shape at regular intervals. That is, the gap 18 is set uniformly in the axial direction in the range of 1.5 to 2.0 mm, and the cylindrical portion 14 can be reduced in diameter by 0.3 to 0.7 mm in the radial direction. When the diameter of the cylindrical portion 14 is reduced most, the one side surface 18a and the other side surface 18b come into contact with each other, and the further diameter reduction is restricted. The amplitude and pitch of the wave in the gap 18 are arbitrarily set. Further, as shown in FIGS. 2A and 2B, the annular flange 15 overlaps one side 16a of the plate member 13a with the other side 16b, and the side edge of the one side 16a is It is formed so as to extend in a direction intersecting with the axial direction of the cylindrical portion 14. Alternatively, as shown in FIGS. 2 (c) and 2 (d), the one side surface 17 a and the other side surface 17 b of the plate member 13 a are abutted, and the abutting portion 17 extends in a direction intersecting the axial direction of the cylindrical portion 14. Is formed.

図５及び図６に示すように、継手２０は合金（真鍮、青銅等）等の金属により形成され、その基端部に設けられた第１雄ねじ部２３に流体管４１が螺合される略円筒状の継手本体２１と、継手本体２１の先端側に螺合される押し輪２２とから構成されている。継手本体２１の先端部の内周面には、雌ねじ部２４が形成されている。また、継手本体２１内には、当接面２５が継手本体２１の軸線と直交するように円環状に設けられ、インコア１３が内挿された樹脂パイプ１１を継手本体２１内に嵌入したときには、樹脂パイプ１１の嵌入が所定位置で止まるようになっている。この当接面２５を境界として、継手本体２１内の空間は当接面２５より先端側が樹脂パイプ１１の嵌入空間２７となっている。   As shown in FIGS. 5 and 6, the joint 20 is formed of a metal such as an alloy (brass, bronze, etc.), and the fluid pipe 41 is screwed into the first male screw portion 23 provided at the base end portion thereof. It is comprised from the cylindrical coupling main body 21 and the push ring 22 screwed together by the front end side of the coupling main body 21. As shown in FIG. A female thread portion 24 is formed on the inner peripheral surface of the distal end portion of the joint body 21. Further, when the resin pipe 11 in which the abutting surface 25 is provided in an annular shape so as to be orthogonal to the axis of the joint body 21 and the in-core 13 is inserted is fitted in the joint body 21, The insertion of the resin pipe 11 is stopped at a predetermined position. With the abutting surface 25 as a boundary, the space inside the joint body 21 is a fitting space 27 for the resin pipe 11 on the tip side of the abutting surface 25.

継手本体２１の内周面には、その先端側へ向かうに従い拡径する傾斜面２８が形成されている。この傾斜面２８に連なる継手本体２１の内周面には受け面２９が継手本体２１の先端側へ向かうに従い拡径するテーパ面状に形成されている。また、当接面２５及び傾斜面２８の間において、継手本体２１の内周面にはその基端側から順に第１環状溝３０及び第２環状溝３１がそれぞれ周方向に沿って凹設されている。第１環状溝３０及び第２環状溝３１には、ゴム材料製の円環状をなす第１シールリング３２及び第２シールリング３３がそれぞれ嵌着されている。そして、継手本体２１内に樹脂パイプ１１が嵌入される際、第１シールリング３２及び第２シールリング３３は樹脂パイプ１１の外周面に圧接し、樹脂パイプ１１の外周面と継手本体２１の内周面との隙間をシールするようになっている。   An inclined surface 28 is formed on the inner peripheral surface of the joint body 21 so as to increase in diameter toward the distal end side. A receiving surface 29 is formed on the inner peripheral surface of the joint body 21 connected to the inclined surface 28 in a tapered surface shape whose diameter is increased toward the distal end side of the joint body 21. Further, between the abutment surface 25 and the inclined surface 28, a first annular groove 30 and a second annular groove 31 are respectively provided in the inner circumferential surface of the joint body 21 along the circumferential direction from the proximal end side. ing. A first seal ring 32 and a second seal ring 33 each having an annular shape made of a rubber material are fitted into the first annular groove 30 and the second annular groove 31. When the resin pipe 11 is inserted into the joint main body 21, the first seal ring 32 and the second seal ring 33 are pressed against the outer peripheral surface of the resin pipe 11, and the outer peripheral surface of the resin pipe 11 and the inside of the joint main body 21 are The gap with the peripheral surface is sealed.

前記押し輪２２は略円筒状をなし、その先端部の外周面には第２雄ねじ部３４が形成され、継手本体２１の雌ねじ部２４に螺合可能になっている。押し輪２２の中心には、前記樹脂パイプ１１の直径と対応する内径を有する挿入孔３５が形成されるとともに、挿入孔３５の基端部には樹脂パイプ接続口３６が形成されている。また、第２雄ねじ部３４の外周縁に連なる押し輪２２の外周面には第３環状溝３７が凹設され、その第３環状溝３７には第３シールリング３８が嵌着されている。そして、この第３シールリング３８は、押し輪２２を継手本体２１に螺合した際、押し輪２２が緩むのを防止している。継手本体２１内には、スペーサ３９を介装した一対のロックリング４０が押し輪２２により継手本体２１内からの抜け出しを規制された状態で配設されている。そして、継手本体２１内に挿着される樹脂パイプ１１の外周面に対しロックリング４０が係合することにより、樹脂パイプ１１が継手本体２１内に抜け止め保持されるようになっている。   The push ring 22 has a substantially cylindrical shape, and a second male screw portion 34 is formed on the outer peripheral surface of the tip portion thereof, and can be screwed into the female screw portion 24 of the joint body 21. An insertion hole 35 having an inner diameter corresponding to the diameter of the resin pipe 11 is formed at the center of the push ring 22, and a resin pipe connection port 36 is formed at the proximal end portion of the insertion hole 35. A third annular groove 37 is recessed in the outer peripheral surface of the push ring 22 connected to the outer peripheral edge of the second male screw portion 34, and a third seal ring 38 is fitted in the third annular groove 37. The third seal ring 38 prevents the push ring 22 from loosening when the push ring 22 is screwed into the joint body 21. In the joint main body 21, a pair of lock rings 40 with spacers 39 are disposed in a state in which the lock ring 40 is restricted from being pulled out from the joint main body 21 by the push ring 22. The lock pipe 40 is engaged with the outer peripheral surface of the resin pipe 11 that is inserted into the joint body 21, so that the resin pipe 11 is held in the joint body 21 so as not to be detached.

さて、インコア１３を樹脂パイプ１１に内挿する場合には、図３（ａ）に示すように、インコア１３の他端を樹脂パイプ１１の端部開口に挿入する。続いて、インコア１３の鍔部１５を樹脂パイプ１１の端面１２に向かい押し込む。すると、インコア１３の筒部１４は樹脂パイプ１１の内周面に沿って縮径されながら鍔部１５が樹脂パイプ１１の端面１２に当接するまで挿入される。インコア１３の筒部１４に形成された隙間１８は図３（ｂ）に示すように樹脂パイプ１１の内周面のうち、摺接面１９の範囲、即ち図中の矢印で示す振幅の範囲で移動する。   When the incore 13 is inserted into the resin pipe 11, the other end of the incore 13 is inserted into the end opening of the resin pipe 11 as shown in FIG. Subsequently, the flange portion 15 of the in-core 13 is pushed toward the end surface 12 of the resin pipe 11. Then, the cylindrical portion 14 of the in-core 13 is inserted until the flange portion 15 contacts the end surface 12 of the resin pipe 11 while being reduced in diameter along the inner peripheral surface of the resin pipe 11. As shown in FIG. 3B, the gap 18 formed in the cylindrical portion 14 of the in-core 13 is in the range of the sliding contact surface 19 of the inner peripheral surface of the resin pipe 11, that is, in the amplitude range indicated by the arrow in the drawing. Moving.

このとき、インコア１３の筒部１４に形成された隙間１８を介して対向する端縁の第１エッジ部１８ｃが樹脂パイプ１１の内周面と摺接する摺接範囲５０は図４（ａ）に示す網掛け部になる。すなわち、第１エッジ部１８ｃが樹脂パイプ１１の内周面に対して軸線方向と交差する方向に広い面積で摺接する。このため、第１エッジ部１８ｃに対する樹脂パイプ１１の内周面の抵抗が大きく第１エッジ部１８ｃは角がとれたり、丸くなったり、小さくなったりする。従って、樹脂パイプ１１の内周面に対して傷が付くことが抑えられる。しかも、樹脂パイプ１１の内周面の所定箇所が第１エッジ部１８ｃによって摺接されるのは、インコア１３の軸線方向に沿う第１エッジ部１８ｃの一部である。その結果、図４（ｂ）に示すように、樹脂パイプ１１の内周面に形成される傷付き部分５２が浅くなる。   At this time, the slidable contact range 50 in which the first edge portion 18c at the edge facing the gap 18 formed in the cylindrical portion 14 of the in-core 13 is in sliding contact with the inner peripheral surface of the resin pipe 11 is shown in FIG. It becomes the shaded part shown. That is, the first edge portion 18 c is in sliding contact with the inner peripheral surface of the resin pipe 11 in a direction that intersects the axial direction with a wide area. For this reason, the resistance of the inner peripheral surface of the resin pipe 11 with respect to the first edge portion 18c is large, and the first edge portion 18c is rounded, rounded, or small. Therefore, the inner peripheral surface of the resin pipe 11 is suppressed from being damaged. Moreover, it is a part of the first edge portion 18c along the axial direction of the in-core 13 that the predetermined portion of the inner peripheral surface of the resin pipe 11 is slidably contacted by the first edge portion 18c. As a result, as shown in FIG. 4B, the damaged portion 52 formed on the inner peripheral surface of the resin pipe 11 becomes shallow.

一方、隙間１８が筒部１４の軸線方向に延びるように設けられた従来の場合には、隙間５３を介して対向する端縁のエッジ部５４が樹脂パイプ１１の内周面と摺接する摺接範囲５１は図４（ｃ）に示す直線の太さで表される。従って、図４（ｄ）に示すように、樹脂パイプ１１の内周面の同じ位置を次第に深く切り込むように摺接するため傷付き部分５５が深くなる。このように、本実施形態の摺接範囲５０は、従来技術の摺接範囲５１に比べて面積が格段に広く、樹脂パイプ１１の内周面に対する第１エッジ部１８ｃの傷付きは浅いもので済むため、樹脂パイプ１１の内周面に傷が付くことを抑制することができる。   On the other hand, in the conventional case in which the gap 18 is provided so as to extend in the axial direction of the cylindrical portion 14, the edge portion 54 of the edge facing through the gap 53 is in sliding contact with the inner peripheral surface of the resin pipe 11. The range 51 is represented by the thickness of the straight line shown in FIG. Therefore, as shown in FIG. 4 (d), the damaged portion 55 becomes deeper due to sliding contact so that the same position on the inner peripheral surface of the resin pipe 11 is gradually cut deeper. Thus, the slidable contact range 50 of the present embodiment has a much larger area than the slidable contact range 51 of the prior art, and the first edge portion 18 c is not easily damaged with respect to the inner peripheral surface of the resin pipe 11. Therefore, it is possible to suppress the inner peripheral surface of the resin pipe 11 from being damaged.

そして、インコア１３が樹脂パイプ１１に内挿された際、縮径されていたインコア１３の筒部１４はばね性により樹脂パイプ１１内において復元しようと拡径し、樹脂パイプ１１の内周面に密着する。これにより、インコア１３の樹脂パイプ１１からの離脱を防止することができる。   When the in-core 13 is inserted into the resin pipe 11, the diameter of the cylindrical portion 14 of the in-core 13 that has been reduced in diameter is expanded so as to be restored in the resin pipe 11 due to the spring property, and is formed on the inner peripheral surface of the resin pipe 11. In close contact. Thereby, the detachment of the in-core 13 from the resin pipe 11 can be prevented.

次に、インコア１３が内挿された樹脂パイプ１１を継手２０に嵌入する場合には、図５及び図６に示すように、継手２０の押し輪２２に形成された樹脂パイプ接続口３６からインコア１３が内挿された側の樹脂パイプ１１の端部を挿入する。このとき、樹脂パイプ１１の端面１２から突出したインコア１３の鍔部１５は、継手本体２１内に嵌着された第１シールリング３２と第２シールリング３３とを樹脂パイプ１１を先導するように通過する。そして、インコア１３の鍔部１５が継手本体２１内の当接面２５に当接するまで樹脂パイプ１１を継手２０に嵌入する。すると、図６に示すように、樹脂パイプ１１の外周面は第１シールリング３２と第２シールリング３３によってシールされるとともに、一対のロックリング４０により抜け止め保持された状態、つまり接続状態となる。   Next, when the resin pipe 11 in which the in-core 13 is inserted is fitted into the joint 20, as shown in FIGS. 5 and 6, the in-core is formed from the resin pipe connection port 36 formed in the push ring 22 of the joint 20. The end of the resin pipe 11 on the side where 13 is inserted is inserted. At this time, the flange portion 15 of the in-core 13 protruding from the end face 12 of the resin pipe 11 leads the first seal ring 32 and the second seal ring 33 fitted in the joint body 21 to lead the resin pipe 11. pass. The resin pipe 11 is inserted into the joint 20 until the flange portion 15 of the in-core 13 comes into contact with the contact surface 25 in the joint body 21. Then, as shown in FIG. 6, the outer peripheral surface of the resin pipe 11 is sealed by the first seal ring 32 and the second seal ring 33, and is held in a retaining state by the pair of lock rings 40, that is, in the connected state. Become.

このとき、樹脂パイプ１１の端面１２から突出したインコア１３に設けられた鍔部１５は、板材の一側部１６ａを他側部１６ｂに重ね合わせて円環状に構成されるとともに、鍔部１５の一側部１６ａは筒部１４の軸線方向と交差する方向に延びている。インコア１３を内挿した樹脂パイプ１１を継手本体２１内に嵌入する際には、樹脂パイプ１１より突出した鍔部１５上の一側部１６ａの側縁に形成される第２エッジ部１６ｃが押し輪２２の内周面、ロックリング４０及び継手本体２１の内周面に摺接した後に第１シールリング３２及び第２シールリング３３に摺接する。第２エッジ部１６ｃのこれらの摺接部分は周方向一定範囲をもって形成される。このため、第２エッジ部１６ｃに対する押し輪２２の内周面、ロックリング４０及び継手本体２１の内周面の抵抗が大きく第２エッジ部１６ｃは角がとれたり、丸くなったり、小さくなったりする。従って、環状の第１シールリング３２及び第２シールリング３３に傷を付けることを抑制することができる。また、板材１３ａの一側面１７ａと他側面１７ｂとを筒部１４の軸線方向と交差する方向に突き合わせ、突き合せ部１７が形成された場合においても、同様の作用、効果を得ることができる。   At this time, the flange portion 15 provided on the in-core 13 protruding from the end surface 12 of the resin pipe 11 is configured in an annular shape by superimposing one side portion 16a of the plate material on the other side portion 16b. The one side portion 16 a extends in a direction intersecting with the axial direction of the cylindrical portion 14. When the resin pipe 11 in which the in-core 13 is inserted is inserted into the joint body 21, the second edge portion 16c formed on the side edge of the one side portion 16a on the flange portion 15 protruding from the resin pipe 11 is pushed. After being in sliding contact with the inner peripheral surface of the ring 22, the lock ring 40, and the inner peripheral surface of the joint body 21, the first seal ring 32 and the second seal ring 33 are slidably contacted. These sliding portions of the second edge portion 16c are formed with a certain range in the circumferential direction. For this reason, the resistance of the inner peripheral surface of the push ring 22, the lock ring 40, and the inner peripheral surface of the joint main body 21 with respect to the second edge portion 16c is large, and the second edge portion 16c is rounded, rounded, or small. To do. Accordingly, it is possible to suppress damage to the annular first seal ring 32 and the second seal ring 33. In addition, even when the one side surface 17a and the other side surface 17b of the plate member 13a are butted in a direction intersecting the axial direction of the cylindrical portion 14 and the butted portion 17 is formed, the same action and effect can be obtained.

ここで、図５に示す状態はインコア１３の鍔部１５の外周部が第２シールリング３３に当接して樹脂パイプ１１の外周面と継手本体２１の内周面がシールされていない状態、つまり樹脂パイプ１１の挿入が不十分な状態である。このとき、インコア１３の筒部１４には隙間１８が形成されているため、施工時において液体による圧力検査を行うと、液体は隙間１８から鍔部１５の内周部に到達することができる。そして、液体は樹脂パイプ１１の外周面と継手本体２１の内周面の隙間を通り、押し輪２２に形成される樹脂パイプ接続口３６から流出するため、樹脂パイプ１１の挿入が不十分な状態であることを容易に確認することができる。   Here, the state shown in FIG. 5 is a state in which the outer peripheral portion of the flange portion 15 of the in-core 13 is in contact with the second seal ring 33 and the outer peripheral surface of the resin pipe 11 and the inner peripheral surface of the joint body 21 are not sealed. The resin pipe 11 is not sufficiently inserted. At this time, since a gap 18 is formed in the cylindrical portion 14 of the in-core 13, the liquid can reach the inner peripheral portion of the flange portion 15 from the gap 18 when a pressure test is performed with a liquid during construction. The liquid flows through the gap between the outer peripheral surface of the resin pipe 11 and the inner peripheral surface of the joint body 21 and flows out from the resin pipe connection port 36 formed in the push ring 22, so that the resin pipe 11 is not sufficiently inserted. It can be confirmed easily.

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。
・ 前記の実施形態のインコア１３を構成する筒部１４には、隙間１８が筒部１４の軸線方向と交差する方向に延びるように設けられている。この隙間１８を介して対向する端縁の第１エッジ部１８ｃは、樹脂パイプ１１の内周面と摺接するが、隙間１８が筒部１４の軸線方向に延びている場合と比較すると樹脂パイプ１１の内周面と摺接する面積が広く、樹脂パイプ１１の内周面に傷が付くことを抑制することができる。その結果、継手２０の使用時に高い圧力が樹脂パイプ１１内に加わった場合に、傷付き部分から損傷が更に広がるおそれがない。 The effects exhibited by the above embodiment will be described below.
-The cylinder part 14 which comprises the in-core 13 of the said embodiment is provided so that the clearance gap 18 may be extended in the direction which cross | intersects the axial direction of the cylinder part 14. As shown in FIG. The first edge portion 18c at the edge facing through the gap 18 is in sliding contact with the inner peripheral surface of the resin pipe 11, but the resin pipe 11 is compared with the case where the gap 18 extends in the axial direction of the cylindrical portion 14. The area that is in sliding contact with the inner peripheral surface of the resin pipe 11 is large, and the inner peripheral surface of the resin pipe 11 can be prevented from being damaged. As a result, when a high pressure is applied to the resin pipe 11 when the joint 20 is used, there is no possibility that damage will further spread from the damaged portion.

・ 更に、インコア１３の鍔部１５は、板材１３ａの一側部１６ａを他側部１６ｂに重ね合わせるとともに、一側部１６ａの側縁は筒部１４の軸線方向と交差する方向に延びるよう構成されている。この一側部１６ａの側縁に形成される第２エッジ部１６ｃは、継手本体２１内に嵌着される第１シールリング３２と第２シールリング３３と接触するが、その前に第２エッジ部１６ｃは、押し輪２２の内周面、ロックリング４０等に摺接する。このとき、第２エッジ部１６ｃは、これらの押し輪２２の内周面、ロックリング４０等の抵抗により角がとれたり、丸くなったり、小さくなったりし、第１シールリング３２と第２シールリング３３に傷が付くことを抑制することができる。また、インコア１３の鍔部１５が、板材の一側面１７ａと他側面１７ｂとを筒部１４の軸線方向と交差する方向に延びるよう突き合わせた場合においても、第１シールリング３２と第２シールリング３３に傷が付くことを抑制することができる。   Further, the flange portion 15 of the in-core 13 is configured so that the one side portion 16a of the plate member 13a is overlapped with the other side portion 16b, and the side edge of the one side portion 16a extends in a direction intersecting the axial direction of the cylindrical portion 14. Has been. The second edge portion 16c formed on the side edge of the one side portion 16a is in contact with the first seal ring 32 and the second seal ring 33 that are fitted into the joint body 21, but before that, the second edge portion 16c is contacted with the second edge portion 16a. The portion 16c is in sliding contact with the inner peripheral surface of the push ring 22, the lock ring 40, and the like. At this time, the second edge portion 16c is rounded, rounded, or reduced due to the resistance of the inner peripheral surface of the push ring 22, the lock ring 40, etc., and the first seal ring 32 and the second seal It is possible to suppress the ring 33 from being damaged. Even when the flange portion 15 of the in-core 13 abuts the one side surface 17a and the other side surface 17b of the plate material so as to extend in a direction intersecting the axial direction of the cylindrical portion 14, the first seal ring 32 and the second seal ring It is possible to suppress the 33 from being scratched.

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。
・ 前記インコア１３を構成する板材１３ａの少なくとも側縁に対し、バレル加工法、ショットピーニング法又はサンドブラスト法により面取り加工を施してもよい。 In addition, this embodiment can also be changed and embodied as follows.
-You may chamfer by the barrel processing method, the shot peening method, or the sandblasting method with respect to the at least side edge of the board | plate material 13a which comprises the said in-core 13. FIG.

・ 鍔部１５の側部を鍔部１５の他の部分より若干窪ませて、第１シールリング３２と第２シールリング３３に傷を付けることを更に抑制することができるように構成してもよい。   -Even if it comprises so that the side part of the collar part 15 may be depressed slightly from the other part of the collar part 15, and it may further suppress that the 1st seal ring 32 and the 2nd seal ring 33 are damaged. Good.

・ 前記インコア１３の筒部１４及び鍔部１５を、ばね性を有する金属製の板材１３ａを雄型と雌型を用いるプレス絞り加工により円筒体に形成し、その後、筒部１４に隙間１８を筒部１４の軸線方向と交差する方向に形成してもよい。   The cylindrical portion 14 and the flange portion 15 of the in-core 13 are formed into a cylindrical body by press drawing using a male plate and a female die, and a gap 18 is formed in the cylindrical portion 14. You may form in the direction which cross | intersects the axial direction of the cylinder part 14. FIG.

・ 隙間１８を次第に広くなるように、或は次第に狭くなるように形成することも可能である。
更に、前記実施形態又は別例より把握できる技術的思想について以下に記載する。 It is also possible to form the gap 18 so as to gradually widen or gradually narrow.
Furthermore, the technical idea which can be grasped from the embodiment or another example will be described below.

・ 前記筒部及び鍔部は、ばね性を有する金属材料製の板材を曲げ加工して形成されているインコア。このように構成した場合、インコアを容易に製作することができる。 - the tubular portion and the flange portion, Louis Nkoa is formed by bending a plate material made of a metal material having a spring property. In such a configuration, the in-core can be easily manufactured.

・ 前記板材に対し、バレル加工法、ショットピーニング法又はサンドブラスト法による研磨加工を施し、板材の側縁に面取りを行ったインコア。このように構成した場合、エッジ部が除去され、樹脂パイプの内周面及び継手本体内に嵌着されたシールリングに傷を付けることを更に抑制することができる。 · To said plate member, a barrel processing method, subjected to polishing by shot peening or sandblasting, Lee Nkoa subjected to chamfering to the side edges of the plate material. When comprised in this way, an edge part is removed and it can suppress further that a seal ring fitted in the internal peripheral surface of the resin pipe and the coupling main body is damaged.

（ａ）は樹脂パイプとインコアを示す分解斜視図、（ｂ）はインコアを示す半断面図、（ｃ）は曲げ加工前の板材を示す平面図。(A) is a disassembled perspective view which shows a resin pipe and an incore, (b) is a half sectional view which shows an incore, (c) is a top view which shows the board | plate material before a bending process. （ａ）、（ｃ）はインコアを示す平面図、（ｂ）は（ａ）の２ｂ−２ｂ線における断面図、（ｄ）は（ｃ）の２ｄ−２ｄ線における断面図。(A), (c) is a top view which shows an in-core, (b) is sectional drawing in the 2b-2b line of (a), (d) is sectional drawing in the 2d-2d line of (c). （ａ）樹脂パイプにインコアを内挿する状態を示す部分破断側面図、（ｂ）は（ａ）の３ｂ−３ｂ線における断面図。(A) The partially broken side view which shows the state which inserts an incore in a resin pipe, (b) is sectional drawing in the 3b-3b line | wire of (a). （ａ）は実施形態におけるインコア及び樹脂パイプの内周面を示す断面図、（ｂ）は（ａ）の４ｂ−４ｂ線における部分拡大断面図、（ｃ）は従来技術におけるインコア及び樹脂パイプの内周面を示す断面図、（ｄ）は（ｃ）の４ｄ−４ｄ線における部分拡大断面図。(A) is sectional drawing which shows the inner peripheral surface of the incore and resin pipe in embodiment, (b) is the fragmentary expanded sectional view in the 4b-4b line of (a), (c) is the incore and resin pipe in a prior art. Sectional drawing which shows an internal peripheral surface, (d) is the elements on larger scale of the 4d-4d line of (c). インコアを内挿した樹脂パイプの継手に対する嵌入が不十分な状態を示す継手の半断面図。The half sectional view of the joint which shows the state where the insertion to the joint of the resin pipe which inserted the in-core is inadequate. インコアを内挿した樹脂パイプを継手に完全に嵌入した状態を示す継手の半断面図。The half sectional view of the joint which shows the state where the resin pipe which inserted the in-core was completely inserted in the joint.

符号の説明Explanation of symbols

１１…樹脂パイプ、１３…インコア、１３ａ…板材、１４…筒部、１５…鍔部、１６ａ…一側部、１６ｂ…他側部、１７…突き合せ部、１７ａ…一側面、１７ｂ…他側面、１８…隙間、２０…継手、３２、３３…環状のシールリング。   DESCRIPTION OF SYMBOLS 11 ... Resin pipe, 13 ... Incore, 13a ... Board | plate material, 14 ... Tube part, 15 ... Gutter part, 16a ... One side part, 16b ... Other side part, 17 ... Butt part, 17a ... One side, 17b ... Other side , 18 ... gap, 20 ... joint, 32, 33 ... annular seal ring.

Claims (3)

筒部と、その一端に設けられた鍔部とを備え、樹脂パイプの端部に内挿され、内挿された状態の樹脂パイプが筒状をなす継手に嵌入され、その状態で継手内に嵌着される環状のシールリングにより、樹脂パイプの外周面と継手の内周面との間で継手内を流通する液体のシールを行うように構成されたインコアであって、
前記筒部及び鍔部は、ばね性を有する金属材料で形成され、前記筒部にはその軸線方向と交差する方向に延びる所定間隔の隙間が設けられるとともに、拡縮径可能に構成されており、
前記隙間は波状に延びるように構成されていることを特徴とするインコア。 It is provided with a cylindrical portion and a flange portion provided at one end thereof, and is inserted into the end portion of the resin pipe, and the inserted resin pipe is inserted into a cylindrical joint, and in that state, the joint is inserted into the joint. An in-core configured to seal the liquid flowing in the joint between the outer peripheral surface of the resin pipe and the inner peripheral surface of the joint by an annular seal ring to be fitted,
The cylindrical portion and the flange portion are formed of a metal material having a spring property, and the cylindrical portion is provided with a gap of a predetermined interval extending in a direction intersecting the axial direction, and is configured to be able to expand and contract .
The in-core, wherein the gap is configured to extend in a wave shape. 筒部と、その一端に設けられた鍔部とを備え、樹脂パイプの端部に内挿され、内挿された状態の樹脂パイプが筒状をなす継手に嵌入され、その状態で継手内に嵌着される環状のシールリングにより、樹脂パイプの外周面と継手の内周面との間で継手内を流通する液体のシールを行うように構成されたインコアであって、
前記筒部及び鍔部は、ばね性を有する金属材料で形成され、前記筒部にはその軸線方向と交差する方向に延びる所定間隔の隙間が設けられるとともに、拡縮径可能に構成されており、
前記鍔部は、板材の一側部を他側部に重ね合わせて円環状に構成されるとともに、一側部の側縁は前記筒部の軸線方向と交差する方向に延びるように構成されていることを特徴とするインコア。 It is provided with a cylindrical portion and a flange portion provided at one end thereof, and is inserted into the end portion of the resin pipe, and the inserted resin pipe is inserted into a cylindrical joint, and in that state, the joint is inserted into the joint. An in-core configured to seal the liquid flowing in the joint between the outer peripheral surface of the resin pipe and the inner peripheral surface of the joint by an annular seal ring to be fitted,
The cylindrical portion and the flange portion are formed of a metal material having a spring property, and the cylindrical portion is provided with a gap of a predetermined interval extending in a direction intersecting the axial direction, and is configured to be able to expand and contract.
The flange portion is configured in an annular shape by superimposing one side portion of the plate material on the other side portion, and the side edge of the one side portion is configured to extend in a direction intersecting the axial direction of the cylindrical portion. In- core , characterized by 筒部と、その一端に設けられた鍔部とを備え、樹脂パイプの端部に内挿され、内挿された状態の樹脂パイプが筒状をなす継手に嵌入され、その状態で継手内に嵌着される環状のシールリングにより、樹脂パイプの外周面と継手の内周面との間で継手内を流通する液体のシールを行うように構成されたインコアであって、
前記筒部及び鍔部は、ばね性を有する金属材料で形成され、前記筒部にはその軸線方向と交差する方向に延びる所定間隔の隙間が設けられるとともに、拡縮径可能に構成されており、
前記鍔部は、板材の一側面と他側面とを突き合せて円環状に構成されるとともに、突き合せ部は前記筒部の軸線方向と交差する方向に延びるように構成されていることを特徴とするインコア。 It is provided with a cylindrical portion and a flange portion provided at one end thereof, and is inserted into the end portion of the resin pipe, and the inserted resin pipe is inserted into a cylindrical joint, and in that state, the joint is inserted into the joint. An in-core configured to seal the liquid flowing in the joint between the outer peripheral surface of the resin pipe and the inner peripheral surface of the joint by an annular seal ring to be fitted,
The cylindrical portion and the flange portion are formed of a metal material having a spring property, and the cylindrical portion is provided with a gap of a predetermined interval extending in a direction intersecting the axial direction, and is configured to be able to expand and contract.
The flange portion is configured in an annular shape by abutting one side surface and the other side surface of the plate material, and the abutting portion is configured to extend in a direction intersecting the axial direction of the cylindrical portion. In- core .
JP2003380036A 2003-11-10 2003-11-10 Incore Expired - Fee Related JP4428621B2 (en)

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