JP5421612B2

JP5421612B2 - Dissimilar pipe joint

Info

Publication number: JP5421612B2
Application number: JP2009037379A
Authority: JP
Inventors: 賢司水川
Original assignee: Sekisui Chemical Co Ltd
Current assignee: Sekisui Chemical Co Ltd
Priority date: 2009-02-20
Filing date: 2009-02-20
Publication date: 2014-02-19
Anticipated expiration: 2029-02-20
Also published as: JP2010190374A

Description

本発明は、合成樹脂製管材（ポリエチレン樹脂管等）と金属製管材（金属ネジ接合部等）という異種の管材を相対回転可能に接合する異種管接合継手に関する。 The present invention relates to a dissimilar pipe joint for joining dissimilar pipe materials such as a synthetic resin pipe material (polyethylene resin pipe or the like) and a metal pipe material (metal screw joint or the like) so as to be relatively rotatable.

近年、水道本管等は、従来の金属製管材から、耐震性や防食性を備えたポリエチレン管等の合成樹脂製管材に変更されつつある。しかし、建物敷地内の止水栓は、金属製であるため、この合成樹脂製管材と直接接続することができない。
そこで、金属製の止水栓と、合成樹脂製管材とを接続するための継手として、図１４あるいは図１５に示すような異種管接合継手１００，２００が提案されている（特許文献１，２参照）。 In recent years, water mains and the like are being changed from conventional metal pipes to synthetic resin pipes such as polyethylene pipes having earthquake resistance and corrosion resistance. However, since the water faucet in the building site is made of metal, it cannot be directly connected to the synthetic resin pipe.
Then, as a joint for connecting a metal water stop cock and a synthetic resin pipe, dissimilar pipe joints 100 and 200 as shown in FIG. 14 or FIG. 15 have been proposed (Patent Documents 1 and 2). reference).

すなわち、異種管接合継手１００は、一端に電気融着式の受口１１１を有する合成樹脂管部材１１０の他端に、一端にねじ受口１２１が形成された金属管部材１２０の他端がインサート成形されている。また、異種管接合継手２００は、一端に電気融着式の受口２１１を有する合成樹脂管部材２１０の他端に、金属管部材本体２２０の一端がインサート成形されるとともに、金属管部材本体２２０の他端に金属製ユニオン２３０が支持されている。 That is, in the dissimilar pipe joint 100, the other end of the synthetic resin pipe member 110 having an electrofusion-type receiving port 111 at one end and the other end of the metal pipe member 120 having a screw receiving port 121 formed at one end are inserted. Molded. Further, the dissimilar pipe joint 200 has one end of the metal pipe member body 220 inserted and formed at the other end of the synthetic resin pipe member 210 having an electrofusion-type receiving port 211 at one end, and the metal pipe member main body 220. A metal union 230 is supported at the other end of the plate.

そして、異種管接合継手２００は、例えば、図１６に示すような配管構造に用いられる。
すなわち、この配管構造は、建物敷地内に設けられた止水栓３００に金属製ユニオン２３０を介して接続されるとともに、受口２１１に合成樹脂製管材としての短管４１０の一端を挿入して電気融着し、建物敷地と水道本管４００が埋設されている公道等との官民境界付近で電気融着式エルボ４２０を介して短管４１０と、水道本管４００から分岐された分岐管路の垂直管部４３０とを連結するような場合に用いられる。 The heterogeneous pipe joint 200 is used in a piping structure as shown in FIG. 16, for example.
That is, this piping structure is connected to a stop cock 300 provided in a building site through a metal union 230, and one end of a short pipe 410 as a synthetic resin pipe material is inserted into a receiving port 211. A short pipe 410 and a branch pipe branched from the water main 400 through an electric fusion elbow 420 near the public / private boundary between the building site and the public road where the water main 400 is buried. This is used in the case where the vertical pipe portion 430 is connected.

ところで、上記異種管接合継手１００，２００は、金属管部材１２０のインサート部あるいは金属管部材本体２２０のインサート部において、合成樹脂管部材１１０，２１０との界面での止水性能が問題となる。前記界面にゴムパッキンをインサート成形する構造が採れればよいが、射出成形時の熱による変形等によって、ゴムパッキンの止水性能を十分発揮できない。したがって、金属管部材１２０のインサート部あるいは金属管部材本体２２０のインサート部に複雑な溝加工を施すとともに、インサート部に外嵌した金属製かしめリング１３０、２４０をかしめることによって止水性を確保するようにしている。
しかしながら、上記のように、インサート部に複雑な溝加工を施すとともに、かしめリングをかしめるような構造にした場合、製造コストが高くなるとともに、組み立て作業性も悪いという問題がある。 By the way, the dissimilar pipe joints 100 and 200 have a problem of water stoppage performance at the interface with the synthetic resin pipe members 110 and 210 in the insert part of the metal pipe member 120 or the insert part of the metal pipe member main body 220. It is only necessary to adopt a structure in which the rubber packing is insert-molded at the interface, but the water sealing performance of the rubber packing cannot be sufficiently exhibited due to heat deformation or the like during injection molding. Therefore, a complex groove is formed on the insert portion of the metal tube member 120 or the insert portion of the metal tube member main body 220, and the water-tightness is secured by caulking the metal caulking rings 130 and 240 fitted on the insert portion. I am doing so.
However, as described above, when a complicated grooving process is performed on the insert portion and a caulking ring is caulked, there are problems that the manufacturing cost increases and the assembling workability is also poor.

一方、図１７に示すような円筒状合成樹脂管部材本体５１１の一端に円筒状合成樹脂管部材本体５１１の外周方向に張り出す鍔部５１２を有する合成樹脂管部材５１０に金属管部材としての金属製ユニオン５２０を装着した異種管接合継手５００が従来から使用されている。
この異種管接合継手５００の場合、円筒状合成樹脂管部材本体５１１の鍔部５１２が設けられていない端部を先頭に金属製ユニオン５２０内に挿入するだけで、組み立てることができ、上記異種管接合継手１００，２００に比べ、部品点数が少なく、製造コストを低く抑えることができるとともに、組み立て作業性に優れている。 On the other hand, a metal as a metal tube member is added to a synthetic resin tube member 510 having a flange portion 512 projecting in the outer peripheral direction of the cylindrical synthetic resin tube member main body 511 at one end of the cylindrical synthetic resin tube member main body 511 as shown in FIG. A dissimilar pipe joint 500 equipped with a union 520 is conventionally used.
In the case of this dissimilar pipe joint 500, it is possible to assemble the dissimilar pipe by simply inserting the end of the cylindrical synthetic resin pipe member main body 511 where the flange portion 512 is not provided into the metal union 520 at the top. Compared to the joints 100 and 200, the number of parts is small, the manufacturing cost can be kept low, and the assembly workability is excellent.

また、この異種管接合継手５００を用いた場合でも、図１６に示すような配管構造とするためには、合成樹脂管部材本体５１１の鍔部５１２が設けられていない端部にエルボを接続する必要がある。
しかし、建物の構造の関係で止水栓が官民境界に近い位置に設けられている場合、壁等が邪魔になり、エルボの接続作業が困難なことがある。 Further, even when this dissimilar pipe joint 500 is used, in order to obtain a piping structure as shown in FIG. 16, an elbow is connected to the end of the synthetic resin pipe member main body 511 where the flange portion 512 is not provided. There is a need.
However, if the stop cock is provided at a position close to the public-private boundary due to the structure of the building, the walls may become obstructive and it may be difficult to connect the elbow.

そこで、本発明の発明者は、上記異種管接合継手５００の合成樹脂管部材本体５１１をエルボ状にして曲がり部をユニオン５２０の直近に設けることができれば、上記問題が解決できると考えたのであるが、上記のようなユニオン５２０の取付構造では、ユニオン５２０を合成樹脂管部材５１０の鍔部５１２側まで挿入しようとしても曲がり部が障害になり挿入ができない。 Therefore, the inventor of the present invention thought that the above problem could be solved if the synthetic resin pipe member body 511 of the heterogeneous pipe joint 500 could be elbowed and the bent portion could be provided in the immediate vicinity of the union 520. However, in the mounting structure of the union 520 as described above, even if the union 520 is inserted up to the flange portion 512 side of the synthetic resin pipe member 510, the bent portion becomes an obstacle and cannot be inserted.

特開平０８−１３５８７７号公報Japanese Patent Laid-Open No. 08-135877 特開２００８−６４１６８号公報JP 2008-64168 A

本発明は、上記事情に鑑みて、合成樹脂管部材本体の曲がり部を金属製管材にできるだけ近い部分に設けることができるとともに、できるだけ部品点数が少なく、組み立て作業性がよい異種管接合継手を提供することを目的としている。 In view of the above circumstances, the present invention provides a dissimilar pipe joint having a bent portion of a synthetic resin pipe member main body as close to a metal pipe as possible and having as few parts as possible and good assembly workability. The purpose is to do.

上記目的を達成するために、合成樹脂製管材に接合される合成樹脂管部材と、金属製管材に接合される金属管部材とが接続されてなる異種管接合継手であって、前記合成樹脂管部材が、エルボ構造をした合成樹脂管部材本体とこの合成樹脂管部材本体の一端で外周方向に張り出す鍔部とを有し、前記金属管部材部が、一端に雌ねじ筒部を有し、この雌ねじ筒部に隣接して雌ねじ筒部より内側に鍔状に張り出す合成樹脂管部材の受部を備え、前記合成樹脂管部材の一端部が前記鍔部を前記受部に当接した状態に前記雌ねじ筒部内に挿入されるとともに、雄ねじ部を有して断面円弧状をした複数の割り筒部材が組み合わされて形成される雄ねじ筒部材が、前記合成樹脂管部材本体に外嵌された状態で前記雌ねじ筒部内に前記雄ねじ部をねじ込まれることによって、前記雄ねじ部の端面と前記受部との間で前記鍔部が挟着されていることを特徴としている。

To achieve the above object, a synthetic resin pipe member to be joined to the synthetic resin pipe material, a different pipe junction fittings and gold Shokukan member to be joined to the metallic steel tubing is connected, the synthetic The resin pipe member has a synthetic resin pipe member main body having an elbow structure and a flange portion projecting in an outer peripheral direction at one end of the synthetic resin pipe member main body, and the metal pipe member portion has a female screw cylinder portion at one end. And a receiving portion of a synthetic resin pipe member that protrudes in a bowl shape from the female screw cylinder portion adjacent to the female screw cylinder portion, and one end portion of the synthetic resin tube member abuts the flange portion on the receiving portion. A male threaded cylindrical member formed by combining a plurality of split cylindrical members having a male threaded part and having an arcuate cross section is fitted into the synthetic resin tubular member body. It screwed the male screw portion into the female screw cylindrical portion at state It allows the collar portion between the receiving part and the end surface of the male screw portion is characterized by being clamped.

本発明の異種管接合継手は、合成樹脂管部材本体の他端が他の合成樹脂管材との管端部が挿入され電気融着される受口構造を備えている構造としてもよい。 The dissimilar pipe joint of the present invention may have a structure in which the other end of the synthetic resin pipe member main body has a receiving structure in which a pipe end portion with another synthetic resin pipe is inserted and electrofused.

本発明において、合成樹脂管部材の材質としては、特に限定されないが、例えば、ポリエチレン、ポリプロピレン、ポリ塩化ビニル等が挙げられ、ポリエチレンが好ましい。
金属管部材の材質としては、特に限定されないが、例えば、砲金、真鍮、ステンレス鋼等が挙げられる。 In the present invention, the material of the synthetic resin pipe member is not particularly limited, and examples thereof include polyethylene, polypropylene, polyvinyl chloride, and the like, and polyethylene is preferable.
Although it does not specifically limit as a material of a metal pipe member, For example, gunmetal, brass, stainless steel, etc. are mentioned.

本発明にかかる異種管接合継手は、以上のように構成されているので、金属製管材と、合成樹脂製管材とを別途エルボなどの他の継手を用いなくてもその軸が交差した状態に接合することができる。また、合成樹脂製管材の金属製管材できるだけ近い位置に曲がり部設けることができる。しかも、部品点数が少なく、組み立て作業性がよい。 Since the dissimilar pipe joint according to the present invention is configured as described above, the axes of the metal pipe and the synthetic resin pipe are intersected without using another joint such as an elbow. Can be joined. Further, the bent portion can be provided at a position as close as possible to the metal pipe of the synthetic resin pipe. Moreover, the number of parts is small and the assembly workability is good.

本発明にかかる異種管接合継手の第１の実施の形態をあらわす断面図である。1 is a cross-sectional view showing a first embodiment of a dissimilar pipe joint according to the present invention. 図１の異種管接合継手を構成する合成樹脂管部材の断面図である。It is sectional drawing of the synthetic resin pipe member which comprises the dissimilar pipe joint joint of FIG. 図１の異種管接合継手を構成する金属管部材の本体部の側面図である。It is a side view of the main-body part of the metal pipe member which comprises the dissimilar pipe joint joint of FIG. 図３の本体部の断面図である。It is sectional drawing of the main-body part of FIG. 図１の異種管接合継手を構成する金属管部材の接続部本体部材の側面図である。It is a side view of the connection part main body member of the metal pipe member which comprises the dissimilar pipe joint joint of FIG. 図５の接続部本体部材の断面図である。It is sectional drawing of the connection part main body member of FIG. 図１の異種管接合継手を構成するスプリングの側面図である。It is a side view of the spring which comprises the dissimilar pipe joint joint of FIG. 図１の異種管接合継手を構成する雄ねじ筒部材の側面図である。It is a side view of the external thread cylinder member which comprises the dissimilar pipe joint joint of FIG. 図８の雄ねじ筒部材の断面図である。It is sectional drawing of the external thread cylinder member of FIG. 図１の異種管接合継手を構成する回り止めピンの正面図である。It is a front view of the non-rotating pin which comprises the dissimilar pipe joint joint of FIG. 本発明にかかる異種管接合継手の第２の実施の形態をあらわす断面図である。It is sectional drawing showing 2nd Embodiment of the dissimilar pipe junction joint concerning this invention. 本発明にかかる異種管接合継手の第３の実施の形態をあらわす断面図である。It is sectional drawing showing 3rd Embodiment of the dissimilar pipe joint joint concerning this invention. 本発明にかかる異種管接合継手の第４の実施の形態をあらわす断面図である。It is sectional drawing showing 4th Embodiment of the dissimilar pipe joint joint concerning this invention. 公知の異種管接合継手の１例をあらわす断面図である。It is sectional drawing showing an example of a well-known dissimilar pipe joint. 公知の異種管接合継手の他例をあらわす断面図である。It is sectional drawing showing the other example of a well-known dissimilar pipe joint. 図１５の異種管接合継手を用いた水道本管と止水栓との接続配管構造の１例を説明する図である。It is a figure explaining an example of the connection piping structure of the water main and the water stopcock using the dissimilar pipe joint joint of FIG. 公知の異種管接合継手の他例をあらわす断面図である。It is sectional drawing showing the other example of a well-known dissimilar pipe joint.

以下、本発明を、その実施の形態をあらわす図面を参照しつつ詳しく説明する。
図１は、本発明にかかる異種管接合継手の１つの実施の形態をあらわしている。 Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
FIG. 1 shows one embodiment of a dissimilar pipe joint according to the present invention.

図１に示すように、この異種管接合継手Ａは、合成樹脂管部材１ａと、金属管部材２ａと、雄ねじ筒部材３と、シールリングとしてのＯリング４と、回り止めピン５とから構成されている。 As shown in FIG. 1, the dissimilar pipe joint A is composed of a synthetic resin pipe member 1a, a metal pipe member 2a, a male screw cylinder member 3, an O-ring 4 as a seal ring, and a detent pin 5. Has been.

すなわち、合成樹脂管部材１ａは、ポリエチレン樹脂を射出成形してなり、図１および図２に示すように、合成樹脂管部材本体１１と、鍔部１２とを備えている。
合成樹脂管部材本体１１は、９０°曲がり部１１ａの一端に短尺直管部１１ｂが連設され、９０°曲がり部１１ａの一端に長尺直管部１１ｃが連設されている。 That is, the synthetic resin pipe member 1a is formed by injection-molding polyethylene resin, and includes a synthetic resin pipe member main body 11 and a flange portion 12 as shown in FIGS.
The synthetic resin pipe member body 11 has a short straight pipe portion 11b connected to one end of a 90 ° bent portion 11a and a long straight pipe portion 11c connected to one end of the 90 ° bent portion 11a.

鍔部１２は、短尺直管部１１ｂの先端部に外側に張り出すように設けられている。
また、９０°曲がり部１１ａの端部と、鍔部１２との距離は、後述する雄ねじ筒部材３の管軸方向の長さと略同じか少し長い程度になっている。
さらに、合成樹脂管部材本体１１は、短尺直管部１１ｂの外径をｄ₁、短尺直管部１１ｂの内径をｄ₂、鍔部１２の外径をｄ₃としたとき、d₃ ²−ｄ₁ ²＞ｄ₁ ²−ｄ₂ ²を満足している。 The collar portion 12 is provided so as to protrude outward from the tip portion of the short straight pipe portion 11b.
Further, the distance between the end portion of the 90 ° bent portion 11a and the flange portion 12 is approximately the same as or slightly longer than the length of the male screw cylinder member 3 described later in the tube axis direction.
Further, the synthetic resin pipe member main body 11 is d ₃ ² − when the outer diameter of the short straight pipe portion 11b is d ₁ , the inner diameter of the short straight pipe portion 11b is d ₂ , and the outer diameter of the flange portion 12 is d _3. d ₁ ² > d ₁ ² −d ₂ ² is satisfied.

金属管部材２ａは、砲金、真鍮、ステンレス鋼等の金属材料からなり、本体部２１と、ユニオン接続部２２とを備えている。
本体部２１は、図１、図３及び図４に示すように、後述する雄ねじ筒部材３が螺合する雌ねじ筒部２１ａを有し、他側にユニオン接続部２２を係止する係止鍔部２１ｂを備え、雌ねじ筒部２１ａ側の基端部に鍔部１２の端面に圧接される受部２１ｃがリング状に設けられ、この受部２１ｃに後述するＯリング４が嵌合保持されるリング溝２１ｄが穿設されている。 The metal pipe member 2 a is made of a metal material such as gun metal, brass, stainless steel, and includes a main body portion 21 and a union connection portion 22.
As shown in FIGS. 1, 3, and 4, the main body portion 21 has a female screw cylinder portion 21 a into which a male screw cylinder member 3 described later is screwed, and a locking rod that locks the union connection portion 22 on the other side. A receiving portion 21c is provided in a ring shape at the base end portion on the female screw cylinder portion 21a side, and a later-described O-ring 4 is fitted and held in the receiving portion 21c. A ring groove 21d is formed.

また、雌ねじ筒部２１ａの内径は、鍔部１２の外径ｄ₃よりバラツキ分と最小限隙間分を合わせた間隔程度だけ僅かに大きな径となっているとともに、外側から内側に貫通するねじ孔２１ｅが１つの穿設されている。
係止鍔部２１ｂは、一側に小径部２１ｆを有し、他側に大径部２１ｇを備える２段構造になっている。 The inner diameter of the internal thread tubular portion 21a, with which a variation component with minimal clearance amount slightly larger diameter only about interval combined than the outer diameter d ₃ of the flange 12, screw penetrating from the outside to the inside hole One hole 21e is formed.
The locking collar portion 21b has a two-stage structure having a small diameter portion 21f on one side and a large diameter portion 21g on the other side.

ユニオン接続部２２は、接続部本体部材２３と、スプリング２４とから形成されている。
すなわち、接続部本体部材２３は、図５に示すように、外形が略六角形をして図１及び図６に示すように、一側内周面にスプリング係止溝２３ａを有し、他側内周面に雌ねじ２３ｂが形成された大径部２１ｇと略同じか少し大径の内径を備えた筒状をしている。
スプリング２４は、図７に示すように，無負荷状態でスプリング係止溝２３ａの径より大きな径をした略Ｃ字形をしている。 The union connection part 22 is formed of a connection part main body member 23 and a spring 24.
That is, the connecting portion main body member 23 has a substantially hexagonal outer shape as shown in FIG. 5 and has a spring locking groove 23a on one inner peripheral surface as shown in FIGS. It has a cylindrical shape with an inner diameter that is substantially the same as or slightly larger than the large-diameter portion 21g having a female thread 23b formed on the side inner peripheral surface.
As shown in FIG. 7, the spring 24 has a substantially C shape having a diameter larger than the diameter of the spring locking groove 23a in an unloaded state.

そして、ユニオン接続部２２は、接続部本体部材２３を、本体部２１の中央部付近にスプリング係止溝２３ａ部分が配置されるように、本体部２１に外嵌するとともに、縮径状態に保持したスプリング２４を、本体部２１と接続部本体部材２３との隙間に挿入し、スプリング係止溝２３ａに係止させることによって、本体部２１にその軸方向にスライド自在に保持されている。 And the union connection part 22 hold | maintains the connection part main body member 23 to the main-body part 21 so that the spring latching groove 23a part may be arrange | positioned in the center part vicinity of the main-body part 21, and to a diameter reduction state. The spring 24 is inserted into the gap between the main body 21 and the connection main body member 23 and locked in the spring locking groove 23a, so that the main body 21 is slidably held in the axial direction.

雄ねじ筒部材３は、金属管部材２ａと同様の材料で形成され、短尺直管部１１ｂの外径と略同じか少し大きな内径をしており、図１及び図９に示すように一端に雌ねじ筒部２１ａに螺合する雄ねじ部３１を有し、他端に図８に示すように外形が断面略六角形をしたナット部３２を備えている。
また、この雄ねじ筒部材３は、筒の中心軸に沿って分割された断面半円弧状した２つの半割り筒部材３ａ，３ｂからなり、その分割面を合わせることにより形成されるようになっている。 The male screw cylinder member 3 is formed of the same material as that of the metal pipe member 2a, has an inner diameter substantially the same as or slightly larger than the outer diameter of the short straight pipe portion 11b, and has an internal screw at one end as shown in FIGS. It has a male screw part 31 screwed into the cylinder part 21a, and a nut part 32 whose outer shape is substantially hexagonal in cross section as shown in FIG.
The male screw cylinder member 3 includes two half cylinder members 3a and 3b having a semicircular cross section divided along the central axis of the cylinder, and is formed by combining the divided surfaces. Yes.

回り止めピン５は、図１０に示すように、金属管部材２ａと同種の材料で形成され、一端にねじ孔２１ｅに螺合する雄ねじ部５１を有し、他端にねじ孔２１ｅと略同じが少し小さい外径のピン本体５２を備えている。
雄ねじ部５１側の端面には、六角レンチを受ける六角形の穴（図示せず）が穿設されている。 As shown in FIG. 10, the non-rotating pin 5 is formed of the same kind of material as the metal tube member 2a, has a male screw portion 51 that is screwed into the screw hole 21e at one end, and is substantially the same as the screw hole 21e at the other end. Is provided with a pin body 52 having a slightly smaller outer diameter.
A hexagonal hole (not shown) for receiving a hexagon wrench is formed in the end surface on the male screw portion 51 side.

そして、この異種管接合継手Ａは、以下のようにして製造される。
すなわち、短尺直管部１１ｂの鍔部１２と９０°曲がり部１１ａとの間の部分を２つの半割り筒部材３ａ，３ｂで挟み込み、その分割面同士を密着させて雄ねじ筒部材３をその雄ねじ部３１側が鍔部１２側を向いた状態に短尺直管部１１ｂに外嵌させる。
金属管部材２ａを、リング溝２１ｄにＯリング４を嵌合した状態で受部２１ｃが、鍔部１２の端面に当接するように配置する。なお、Ｏリング４の素材としては、耐老化性・耐候性・耐オゾン性・耐油性（アルコール・ケトン(MEK)・酢酸エチル）に優れたEPDM（「エチレンプロピレンジエンゴム」の略称）等が好適である。 And this dissimilar pipe joint A is manufactured as follows.
That is, the portion between the flange portion 12 of the short straight pipe portion 11b and the 90 ° bent portion 11a is sandwiched between the two half-cylinder members 3a and 3b, and the divided surfaces are brought into close contact with each other so that the male screw cylinder member 3 is connected to the male screw. The part 31 side is externally fitted to the short straight pipe part 11b with the flange part 12 side facing.
The metal pipe member 2a is disposed so that the receiving portion 21c contacts the end surface of the flange portion 12 in a state where the O-ring 4 is fitted in the ring groove 21d. As the material of O-ring 4, EPDM (abbreviation of “ethylene propylene diene rubber”) with excellent aging resistance, weather resistance, ozone resistance and oil resistance (alcohol, ketone (MEK), ethyl acetate), etc. Is preferred.

つぎに、雄ねじ筒部材３を、鍔部１２側にスライドさせて、雄ねじ筒部材３の雄ねじ部３１を雌ねじ筒部２１ａに螺合し、規定のトルクＴになるまで締め込む。
ここで規定のトルクＴとは、受部２１ｃと鍔部１２の端面との面圧（Ｐｓ）を、異種管接合継手Ａ内を流れる内部流体の内水圧より、高くすることができるトルクであれば、特に限定されないが、合成樹脂管部材１ａが上記のようにポリエチレン製である場合、応力緩和特性から、５０年使用を想定した長期経過後では初期面圧の１／３になる可能性があることが実験によって分かっているので、面圧（Ｐｓ）が、内水圧の３倍以上となるトルクとすることが好ましい。なお、トルクの上限は特に限定されないが、金属継手本体の面圧（Ps）は、シールするためには、内部流体の内水圧より、高いのが望ましい。 Next, the male screw cylinder member 3 is slid to the flange part 12 side, the male screw part 31 of the male screw cylinder member 3 is screwed into the female screw cylinder part 21a, and tightened until a prescribed torque T is reached.
Here, the prescribed torque T is a torque that can increase the surface pressure (Ps) between the receiving portion 21c and the end surface of the flange portion 12 to be higher than the internal water pressure of the internal fluid flowing in the dissimilar pipe joint A. For example, when the synthetic resin pipe member 1a is made of polyethylene as described above, there is a possibility that it becomes 1/3 of the initial surface pressure after a long period of time assuming use for 50 years due to stress relaxation characteristics. Since it is known by experiment, it is preferable that the surface pressure (Ps) is a torque that is three times or more the internal water pressure. The upper limit of the torque is not particularly limited, but the surface pressure (Ps) of the metal joint body is preferably higher than the internal water pressure of the internal fluid for sealing.

因みに、締め付けトルク（Ｔ）と、締め付け力（Ｆ）は、一般に次式から求められる。
Ｆ＝Ｔ／(ｄ・ｃ) ・・・式(１)
Ｐｓ＝Ｆ／ａ・・・式(２)
（上記式（１）中、Ｔは締め付けトルク (kgf・cm)、ｄは雌ねじ筒部ネジ径、ｃはネジの摩擦係数、式(２)中、ａは受部２１ｃと鍔部１２の端面との接触面の面積(cm²)である。） Incidentally, the tightening torque (T) and the tightening force (F) are generally obtained from the following equations.
F = T / (d · c) (1)
Ps = F / a (2)
(In the above formula (1), T is the tightening torque (kgf · cm), d is the female screw cylinder diameter, c is the friction coefficient of the screw, and in formula (2), a is the end face of the receiving portion 21c and the flange portion 12. The area of the contact surface with (cm ² )

より具体的に説明すると、雌ねじ筒部２１ａのねじ径ｄ＝４．０３ｃｍ(M42)、ねじの摩擦係数ｃ＝０．２、合成樹脂管部材１ａの鍔部１２が外径＝４０．２ｍｍ、内径＝２５ｍｍ、リング溝２１ｄが外径＝３７ｍｍ内径＝２８ｍｍとすると、
ａ＝π／４×(４０．２²−２５²−(３７²−２８²))＝３．１９ｃｍ²
式(１)、(２)より、
Ｐｓ＝Ｔ／(４．０３×０．２×３．１９)kgf/ｃｍ² ・・・式 (３)
内水圧と面圧とが同じであれば、止水できるため、内水圧を１０ kgf／ｃｍ²とすると、
１０ kgf／ｃｍ²＝Ｔ／(４．０３×０．２×３．１９）kgf／ｃｍ²であるから初期必要締め付けトルクＴが２５．７kgf・ｃｍ以上あれば、合成樹脂管部材１ａと金属管部材２ａとの接合部において十分止水可能である。
しかし、５０年使用を想定した場合、上記のように、５０年経過後には面圧が初期面圧の１／３まで低下する可能性があるので、初期面圧を２５．７kgf・ｃｍ×３＝７７．１kgf・ｃｍ以上とすることが好ましい。 More specifically, the screw diameter d of the female screw cylinder portion 21a is 4.03 cm (M42), the screw friction coefficient c is 0.2, the flange portion 12 of the synthetic resin pipe member 1a has an outer diameter of 40.2 mm, When the inner diameter = 25 mm and the ring groove 21d has an outer diameter = 37 mm and an inner diameter = 28 mm,
a = π / 4 × (40.2 ² −25 ² − (37 ² −28 ² )) = 3.19 cm ²
From equations (1) and (2)
Ps = T / (4.03 × 0.2 × 3.19) kgf / cm ² Formula (3)
If the internal water pressure and the surface pressure are the same, water can be stopped, so if the internal water pressure is 10 kgf / cm ² ,
Since 10 kgf / cm ² = T / (4.03 × 0.2 × 3.19) kgf / cm ² , if the initial required tightening torque T is 25.7 kgf · cm or more, the synthetic resin pipe member 1a and the metal Water can be sufficiently stopped at the joint with the pipe member 2a.
However, when 50 years of use is assumed, as described above, the surface pressure may decrease to 1/3 of the initial surface pressure after 50 years, so the initial surface pressure is 25.7 kgf · cm × 3. = 77.1 kgf · cm or more is preferable.

上記のようにして規定のトルク（Ｔ)で雄ねじ部３１と雌ねじ筒部２１ａとを締め込んだ後、雌ねじ筒部２１ａのねじ孔２１ｅをガイドにしてボール盤等により雄ねじ部３１の途中位置まで達する径方向の有底ピン穴３１ａを形成する。
つぎに、ピン本体５２が有底ピン穴３１ａに入り込むまで回り止めピン５の雄ねじ部５１をねじ孔２１ｅに螺合させる。 After the male screw portion 31 and the female screw cylinder portion 21a are tightened with the prescribed torque (T) as described above, the screw hole 21e of the female screw cylinder portion 21a is used as a guide to reach the middle position of the male screw portion 31 with a drilling machine or the like. The bottomed pin hole 31a in the radial direction is formed.
Next, the male threaded portion 51 of the locking pin 5 is screwed into the screw hole 21e until the pin body 52 enters the bottomed pin hole 31a.

この異種管接合継手Ａは、以上のように、短尺直管部１１ｂの長さを、雄ねじ筒部材３が外嵌できるだけの長さにしたので、曲がり部１１ａと接続される金属製管材との距離を最小限にすることができる。
また、雄ねじ筒部材３を２つの半割り筒部材３ａ，３ｂをその分割面同士を密着させることによって形成できるようにしたので、合成樹脂管部材１ａがエルボ構造をしていても、部品点数が少なく安価に提供できる。
さらに、短尺直管部１１ｂの外径をｄ₁、短尺直管部１１ｂの内径をｄ₂、鍔部１２の外径をｄ₃としたとき、ｄ₃ ²−ｄ₁ ²＞ｄ₁ ²−ｄ₂ ²を満足するように構成したので、短尺直管部１１ｂが破断するような引っ張り力が加わっても鍔部１２から金属管部材２ａおよび雄ねじ筒部材３が抜け落ちることがない。 In this dissimilar pipe joint A, as described above, the length of the short straight pipe portion 11b is set to be long enough for the male threaded cylinder member 3 to be fitted, so that the metal pipe connected to the bent portion 11a The distance can be minimized.
In addition, since the male threaded cylinder member 3 can be formed by bringing the divided surfaces into close contact with each other, the split resin members 1a and 3b can be formed even if the synthetic resin tube member 1a has an elbow structure. Can be provided at low cost.
Moreover, d ₁ the outer diameter of the short straight tube portion 11b, when the inner diameter of the short straight portion 11b and d _2, the outer diameter of the flange portion 12 and _{_{^{_{d 3, d 3 2 -d 1}}}} 2> d 1 2 - Since d ₂ ² is satisfied, the metal tube member 2a and the male screw cylinder member 3 will not fall out of the flange portion 12 even if a tensile force is applied to the short straight tube portion 11b.

また、雄ねじ部３１と雌ねじ筒部２１ａとを、予め規定したトルク範囲内のトルクにて締め付けた後、雌ねじ筒部２１ａに形成したねじ孔２１ｅと連通する有底ピン穴３１ａを雄ねじ部３１に形成し、ピン本体５２の先端が有底ピン穴３１ａに入り込むまで回り止めピン５の雄ねじ部５１をねじ孔２１ｅに螺合させるようにしたので、施工状態で振動等が異種管接合継手Ａに加わっても、雄ねじ部３１と雌ねじ筒部２１ａとの螺合状態が緩むことがなく、雄ねじ部３１と雌ねじ筒部２１ａとを予め規定した範囲内の締め付けトルクの締め付け状態に安定して維持できる。
さらに、受部２１ｃと鍔部１２の端面とを挟圧していることで、管軸方向に外力が加わっても、抜け方向へも差し込み方向へも面接触により移動が規制される。したがって、テーパ面シールの場合のような軸方向外力の影響によるシール圧変動がなく、軸方向外力の影響によるシール圧変動を抑えることができる。 Further, after the male screw portion 31 and the female screw cylinder portion 21a are tightened to a torque within a predetermined torque range, a bottomed pin hole 31a communicating with the screw hole 21e formed in the female screw cylinder portion 21a is formed in the male screw portion 31. Since the male screw portion 51 of the locking pin 5 is screwed into the screw hole 21e until the tip of the pin main body 52 enters the bottomed pin hole 31a, vibrations and the like are caused in the dissimilar pipe joint A in the construction state. Even if added, the screwed state between the male screw part 31 and the female screw cylinder part 21a is not loosened, and the male screw part 31 and the female screw cylinder part 21a can be stably maintained in the tightening state of the tightening torque within a predetermined range. .
Furthermore, by pinching the receiving portion 21c and the end surface of the flange portion 12, even if an external force is applied in the tube axis direction, movement is restricted by surface contact in both the withdrawal direction and the insertion direction. Therefore, there is no fluctuation in the seal pressure due to the influence of the axial external force as in the case of the tapered surface seal, and the fluctuation of the seal pressure due to the influence of the axial external force can be suppressed.

図１１は、本発明にかかる異種管接合継手の第２の実施の形態をあらわしている。
図１１に示すように、この異種管接合継手Ｂは、合成樹脂管部材１ｂが上記長尺直管部１１ｃに代えて、端部に電気融着式の受口を有する直管部１１ｄを備えている以外は、上記異種管接合継手Ａと同様になっている。 FIG. 11 shows a second embodiment of the dissimilar pipe joint according to the present invention.
As shown in FIG. 11, in this dissimilar pipe joint B, the synthetic resin pipe member 1b is provided with a straight pipe part 11d having an electrofusion-type receiving port at the end instead of the long straight pipe part 11c. Except that, it is the same as the above-mentioned dissimilar pipe joint A.

図１２は、本発明にかかる異種管接合継手の第３の実施の形態をあらわしている。
図１２に示すように、この異種管接合継手Ｃは、金属管部材２ｂの金属製管材との接合部がユニオン構造ではなく、雄ねじ筒２５となっている以外は、上記異種管接合継手Ａと同様になっている。 FIG. 12 shows a third embodiment of the dissimilar pipe joint according to the present invention.
As shown in FIG. 12, the dissimilar pipe joint C is different from the dissimilar pipe joint A except that the joint portion of the metal pipe member 2 b with the metal pipe member is not a union structure but a male screw cylinder 25. It is the same.

図１３は、本発明にかかる異種管接合継手の第２の実施の形態をあらわしている。
図１３に示すように、この異種管接合継手Ｄは、金属管部材２ｃの金属製管材との接合部がユニオン構造ではなく、雌ねじ筒２６となっている以外は、上記異種管接合継手Ａと同様になっている。 FIG. 13 shows a second embodiment of the dissimilar pipe joint according to the present invention.
As shown in FIG. 13, the dissimilar pipe joint D is the same as the dissimilar pipe joint A except that the joint of the metal pipe member 2 c with the metal pipe is not a union structure but is a female screw cylinder 26. It is the same.

本発明は、上記の実施の形態に限定されない。たとえば、上記の実施の形態では、回り止めピンを用いて、回り止めを図るようにしていたが、雄ねじ筒部材あるいは袋ナット７と、金属管部材とのねじ接合部において回り止めを図ることができれば、他の方法を用いるようにしても構わない。 The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the anti-rotation pin is used to prevent the rotation. However, it is possible to prevent the rotation at the screw joint portion between the male screw cylinder member or the cap nut 7 and the metal tube member. If possible, other methods may be used.

また、上記の実施の形態では、シールリングとして、Ｏリングが用いられていたが、シール性を確保することができれば、他の構造のメカニカルシールを用いるようにしても良い。また、リング溝は、金属管部材側ではなく、合成樹脂管部材側に設けるようにしても構わない。
さらに、上記の実施の形態では、雄ねじ筒部材が２つ割り筒部材から構成されていたが、３つ以上の割り筒部材から構成されていて構わないし、半割り筒部材の他方の半割り筒部材との接合面に突条または突起及びこの突条または突起に対応する部分に溝または穴を設けて位置決めできるようにしても構わない。 In the above embodiment, an O-ring is used as the seal ring. However, a mechanical seal having another structure may be used as long as the sealing performance can be ensured. The ring groove may be provided not on the metal tube member side but on the synthetic resin tube member side.
Furthermore, in the above embodiment, the male threaded cylinder member is composed of two split cylinder members, but it may be composed of three or more split cylinder members, and the other half cylinder of the half cylinder member. A protrusion or protrusion may be provided on the joint surface with the member, and a groove or hole may be provided in a portion corresponding to the protrusion or protrusion so that positioning can be performed.

Ａ，Ｂ，Ｃ，Ｄ異種管接合継手
１ａ，１ｂ合成樹脂管部材
１１合成樹脂管部材本体
１１ａ曲がり部
１１ｂ短尺直管部
１１ｃ長尺直管部
１１ｄ受口を有する直管部
１２鍔部
２ａ，２ｂ，２ｃ金属管部材
２１本体部
２１ａ雌ねじ筒部
２１ｃ受部
２１ｄリング溝
２１ｅねじ孔
２２ユニオン接続部
２５雄ねじ筒
２６雌ねじ筒
３雄ねじ筒部材
３ａ，３ｂ半割り筒部材（分割体）
４Ｏリング（シールリング）
５回り止めピン
５１雄ねじ部
５２ピン本体 A, B, C, D Heterogeneous pipe joints 1a, 1b Synthetic resin pipe member 11 Synthetic resin pipe member main body 11a Bent part 11b Short straight pipe part 11c Long straight pipe part 11d Straight pipe part 12 Receptor part 2a , 2b, 2c Metal pipe member 21 Main body 21a Female threaded cylinder part 21c Receiving part 21d Ring groove 21e Screw hole 22 Union connection part 25 Male threaded cylinder 26 Female threaded cylinder 3 Male threaded cylinder member 3a, 3b Half-divided cylindrical member (divided body)
4 O-ring (seal ring)
5 Non-rotating pin 51 Male thread 52 Pin body

Claims

A synthetic resin pipe member to be joined to the synthetic resin pipe material, a different pipe junction fittings and gold Shokukan member to be joined to the metallic steel tubing is connected,
The synthetic resin pipe member has an elbow-structured synthetic resin pipe member main body and a flange portion projecting in an outer peripheral direction at one end of the synthetic resin pipe member main body, and the metal pipe member has a female screw cylindrical portion at one end. A synthetic resin pipe member receiving portion that protrudes inward from the female screw cylindrical portion adjacent to the female screw cylindrical portion, and one end portion of the synthetic resin pipe member abuts the flange on the receiving portion. A male threaded cylindrical member formed by combining a plurality of split cylindrical members having a male threaded portion and an arcuate cross section is inserted into the female threaded tubular part in contact with the synthetic resin tube member body. by being screwed to the male screw portion into the female screw cylindrical portion with fitted state, different tube bonded joint, wherein the flange portion is sandwiched between the end surface and the receiving portion of the male screw portion .

The dissimilar pipe joint according to claim 1, wherein the other end of the synthetic resin pipe member main body has a receiving structure in which a pipe end portion with another synthetic resin pipe is inserted and electrofused.