JP5484169B2

JP5484169B2 - Branch joint

Info

Publication number: JP5484169B2
Application number: JP2010094040A
Authority: JP
Inventors: 浩司八幡
Original assignee: Sekisui Chemical Co Ltd
Current assignee: Sekisui Chemical Co Ltd
Priority date: 2010-04-15
Filing date: 2010-04-15
Publication date: 2014-05-07
Anticipated expiration: 2030-04-15
Also published as: JP2011226498A

Description

本発明は、水道管やガス管等を分岐するための分岐継手に関する。 The present invention relates to a branch joint for branching a water pipe or a gas pipe.

従来、水道管、ガス管等を分岐する手段として、水やガス等の流体を本管に流通させた状態で枝管の取り付け／取り外しを行うことができ、また、任意に本管と枝管の間を遮断することができる分岐継手が多用されている。 Conventionally, as a means for branching a water pipe, a gas pipe, etc., a branch pipe can be attached / detached with a fluid such as water or gas flowing through the main pipe, and the main pipe and the branch pipe can be arbitrarily attached. Branch joints that can block the gap are often used.

そして、この種の分岐継手Ａは、例えば、図７及び図８に示すように、本管１の外周面１ａに固着される円弧板状のサドル部２と、サドル部２に下端を繋げて一体形成され、サドル部２の外周面２ａから径方向外側に突設された円筒状の分岐筒部３と、分岐筒部３の外周面３ａに一端を繋げて一体形成され、分岐筒部３の径方向外側に延設された円筒状の枝管接続部４とからなる継手本体５を備えて構成されている。さらに、分岐筒部３内に、分岐筒部３の軸線Ｏ１方向（上下方向）に進退自在に設けられたシールプラグ６と、分岐筒部３の上端３ｂ側に着脱可能に取り付けられたシールキャップ７とを備えて構成されている（例えば、特許文献１参照）。 And this kind of branch joint A connects the lower end to the saddle part 2 with the circular-arc-shaped saddle part 2 fixed to the outer peripheral surface 1a of the main pipe 1 as shown in FIG.7 and FIG.8, for example. A cylindrical branch tube portion 3 that is integrally formed and projects radially outward from the outer peripheral surface 2 a of the saddle portion 2, and is integrally formed with one end connected to the outer peripheral surface 3 a of the branch tube portion 3. And a joint body 5 including a cylindrical branch pipe connection portion 4 extending outward in the radial direction. Furthermore, a seal plug 6 provided in the branch cylinder part 3 so as to be movable forward and backward in the axis O1 direction (vertical direction) of the branch cylinder part 3, and a seal cap detachably attached to the upper end 3b side of the branch cylinder part 3 7 (see, for example, Patent Document 1).

分岐筒部３は、軸線Ｏ１方向中間部分に、内周面３ｄに雌ネジの螺刻を施した雌ネジ部８を設け、上端３ｂ側と下端３ｃ側に、内周面３ｄを軸線Ｏ１方向に沿うストレート面９ａ、１０ａとして形成した上方シール部９と下方シール部１０を設けて形成されている。また、下方シール部１０は、上方シール部９や雌ネジ部８よりも内孔を縮径して形成されている。さらに、分岐筒部３は、上端３ｂ側の外周面３ａに、シールキャップ７を螺合して取り付けるための雄ネジ部１１を備えて形成されている。 The branch cylinder portion 3 is provided with a female screw portion 8 in which a female screw is threaded on the inner peripheral surface 3d at an intermediate portion in the direction of the axis O1. Are formed by providing an upper seal portion 9 and a lower seal portion 10 formed as straight surfaces 9a, 10a. The lower seal portion 10 is formed by reducing the inner diameter of the upper seal portion 9 and the female screw portion 8. Furthermore, the branch cylinder part 3 is provided with the external thread part 11 for screwing and attaching the seal cap 7 to the outer peripheral surface 3a on the upper end 3b side.

シールプラグ６は、略円柱状に形成され、軸線Ｏ２方向上端６ａ側と下端６ｂ側に、外周面６ｃから径方向内側に凹み、周方向に繋がる環状の上部保持溝１２と下部保持溝１３を設け、上部保持溝１２に上部Ｏリング（上部シール部材）１４が、下部保持溝１３に下部Ｏリング（下部シール部材）１５がそれぞれ嵌合して取り付けられている。また、シールプラグ６は、上部保持溝１２と下部保持溝１３の間の中間部分の外周面６ｃに雄ネジ１６の螺刻が施され、この外周面６ｃの雄ネジ１６を分岐筒部３の雌ネジ８に螺合させて分岐筒部３内に設けられている。さらに、シールプラグ６には、上端６ａから下端６ｂ側に向けて凹む係合孔１７が軸線Ｏ２上に形成されている。 The seal plug 6 is formed in a substantially cylindrical shape, and has an annular upper holding groove 12 and a lower holding groove 13 that are recessed radially inward from the outer peripheral surface 6c on the upper end 6a side and the lower end 6b side in the axis O2 direction and connected in the circumferential direction. An upper O-ring (upper seal member) 14 is fitted into the upper holding groove 12 and a lower O-ring (lower seal member) 15 is fitted into the lower holding groove 13. In the seal plug 6, a male screw 16 is threaded on an outer peripheral surface 6 c at an intermediate portion between the upper holding groove 12 and the lower holding groove 13, and the male screw 16 on the outer peripheral surface 6 c is connected to the branch cylinder portion 3. It is screwed into the female screw 8 and is provided in the branch cylinder portion 3. Further, the seal plug 6 is formed with an engagement hole 17 that is recessed from the upper end 6a toward the lower end 6b on the axis O2.

そして、このように構成した分岐継手Ａにおいては、シールプラグ６の係合孔１７にＴ型レンチなどの回転工具を係合し、この回転工具によってシールプラグ６を一方向に回転させ、分岐筒部３の所定の下方位置までシールプラグ６を下げると（螺入すると）、図７（ａ）に示すように、本管１と枝管接続部４の間を遮断した閉栓状態になる。この閉栓状態では、下部Ｏリング１５が分岐筒部３の下方シール部１０の内周面３ｄ（ストレート面１０ａ、側面）に横方向に圧接され、流体がシールプラグ６の外周面６ｃと分岐筒部３の内周面３ｄの間を通じて外部に漏出することが防止される。 In the branch joint A configured as described above, a rotary tool such as a T-type wrench is engaged with the engagement hole 17 of the seal plug 6, and the seal plug 6 is rotated in one direction by the rotary tool to When the seal plug 6 is lowered (screwed in) to a predetermined position below the part 3, as shown in FIG. 7A, the plug 1 is closed between the main pipe 1 and the branch pipe connecting part 4. In this closed state, the lower O-ring 15 is pressed against the inner peripheral surface 3d (straight surface 10a, side surface) of the lower seal portion 10 of the branch cylinder portion 3 in the lateral direction, and the fluid is in contact with the outer peripheral surface 6c of the seal plug 6 and the branch cylinder. Leakage to the outside through the inner peripheral surface 3d of the portion 3 is prevented.

また、図７（ｂ）に示すように、シールプラグ６を他方向に回転させて所定の上方位置まで引き上げると、開栓状態になり、本管１の穿孔１９を通じて本管１と枝管１８の間で流体が流通する。このとき、シールプラグ６の上部Ｏリング１４が分岐筒部３の上方シール部９の内周面３ｄ（ストレート面９ａ、側面）に横方向に圧接され、流体がシールプラグ６の外周面６ｃと分岐筒部３の内周面３ｄの間を通じて外部に漏出することが防止される。 Further, as shown in FIG. 7B, when the seal plug 6 is rotated in the other direction and pulled up to a predetermined upper position, the plug is opened, and the main pipe 1 and the branch pipe 18 are opened through the perforations 19 of the main pipe 1. Fluid flows between them. At this time, the upper O-ring 14 of the seal plug 6 is pressed against the inner peripheral surface 3d (straight surface 9a, side surface) of the upper seal portion 9 of the branch cylinder portion 3 in the lateral direction, and the fluid is in contact with the outer peripheral surface 6c of the seal plug 6. Leakage to the outside through the space between the inner peripheral surfaces 3d of the branch cylinder portion 3 is prevented.

これにより、シールキャップ７を取り外し、回転工具によってシールプラグ６を上下に進退させるだけで、任意に本管１と枝管１８の間を遮断／開放することができる。（閉栓状態／開栓状態にすることができる）。 Thus, the main pipe 1 and the branch pipe 18 can be arbitrarily blocked / opened by simply removing the seal cap 7 and moving the seal plug 6 up and down with the rotary tool. (Can be closed / opened).

特開２００８−１８０３７３号公報JP 2008-180373 A

しかしながら、上記従来の分岐継手Ａにおいては、分岐筒部３の自由端となる上端３ｂ側の上方シール部９を切削加工によって形成しており、上方シール部９に撓みが発生する場合がある。そして、分岐継手Ａが上部Ｏリング１４を横方向に圧接させてシールするように構成されているため、上方シール部９に撓みが発生すると、十分な上部Ｏリング１４の圧縮率（圧接力）を確保できなくなり、流体が外部に漏出するおそれが生じてしまう。このため、上記従来の分岐継手Ａでは、非常にシビアな寸法精度で上方シール部９を加工形成することが要求されており、この上方シール部９の加工形成工程が製造歩掛かりの低下を招く一要因になっていた。 However, in the conventional branch joint A, the upper seal portion 9 on the upper end 3b side that is the free end of the branch tube portion 3 is formed by cutting, and the upper seal portion 9 may bend. Since the branch joint A is configured to seal the upper O-ring 14 in the lateral direction, if the upper seal portion 9 is bent, a sufficient compressibility (pressure contact force) of the upper O-ring 14 is obtained. Cannot be secured, and the fluid may leak out. For this reason, in the conventional branch joint A, it is required to process and form the upper seal part 9 with very severe dimensional accuracy, and the process of forming the upper seal part 9 causes a decrease in manufacturing yield. It was a factor.

請求項１記載の分岐継手は、本管の外周面に固着される円弧板状のサドル部と、前記サドル部に軸線方向下端側を繋げて一体形成された筒状の分岐筒部と、前記分岐筒部の外周面に軸線方向一端側を繋げて一体形成された筒状の枝管接続部と、前記分岐筒部内に、前記分岐筒部の軸線方向に進退自在に設けられたシールプラグとを備える分岐継手において、環状に形成され、前記分岐筒部の上端側に外周縁側を着脱可能に固定して設けられた圧接部材と、前記シールプラグの上端面に取り付けられた環状の上部シール部材とを備え、前記シールプラグを前記分岐筒部の上端側に引き上げるとともに前記上部シール部材が前記圧接部材に上下方向に圧接してシールするように構成されていることを特徴とする。 The branch joint according to claim 1 is an arc plate-shaped saddle portion fixed to the outer peripheral surface of the main pipe, a cylindrical branch tube portion integrally formed by connecting the lower end side in the axial direction to the saddle portion, A cylindrical branch pipe connection part integrally formed by connecting one end side in the axial direction to the outer peripheral surface of the branch cylinder part, and a seal plug provided in the branch cylinder part so as to be movable back and forth in the axial direction of the branch cylinder part A pressure contact member that is annularly formed and is provided with an outer peripheral edge side detachably fixed to an upper end side of the branch tube portion; and an annular upper seal member that is attached to an upper end surface of the seal plug The seal plug is pulled up to the upper end side of the branch tube portion, and the upper seal member is configured to press and seal the pressure contact member in the vertical direction.

請求項２記載の分岐継手は、請求項１記載の分岐継手において、前記圧接部材が、環状の圧接部と、前記圧接部の外周縁に一端を繋げて上方に延設された段部と、前記段部の他端に一端を繋げて径方向外側に延設されたフランジ部とを備えて形成されていることを特徴とする。 The branch joint according to claim 2 is the branch joint according to claim 1, wherein the press contact member includes an annular press contact portion, and a step portion extending upward with one end connected to an outer peripheral edge of the press contact portion; The other end of the step portion is connected to one end and is formed to include a flange portion extending radially outward.

請求項３記載の分岐継手は、請求項１記載の分岐継手において、前記分岐筒部は、上端側の外周面に雄ネジが施され、前記圧接部材は、環状の圧接部と、前記圧接部の外周縁に一端を繋げて下方に延設されるとともに、内周面に雌ネジが施された固定部とを備えて形成されており、前記固定部の雌ネジを前記分岐筒部の雄ネジに螺合させて、前記圧接部材が前記分岐筒部の上端側に着脱可能に設けられていることを特徴とする。 The branch joint according to claim 3 is the branch joint according to claim 1, wherein the branch cylindrical portion is provided with a male screw on an outer peripheral surface on an upper end side, and the pressure contact member includes an annular pressure contact portion and the pressure contact portion. The outer peripheral edge of the branch cylinder portion is connected to one end of the outer peripheral edge of the branch cylinder portion. The pressure contact member is detachably provided on the upper end side of the branch tube portion by being screwed into a screw.

請求項１記載の分岐継手においては、上部シール部材（上部Ｏリング）を分岐筒部の上方シール部の内周面（ストレート面、側面）に横方向に圧接させてシールするのではなく、シールプラグの上端面に上部シール部材を取り付け、且つ分岐筒部の上端側に外周縁側を着脱可能に固定して圧接部材を設け、シールプラグを引き上げるとともに、上部シール部材を圧接部材に上下方向に圧接させる。これにより、流体がシールプラグの外周面と分岐筒部の内周面の間を通じて外部に漏出することを確実に防止することができる。 In the branch joint according to claim 1, the upper seal member (upper O-ring) is not sealed by being pressed against the inner peripheral surface (straight surface, side surface) of the upper seal portion of the branch cylinder portion in the lateral direction. An upper seal member is attached to the upper end surface of the plug, and the outer peripheral edge side is detachably fixed to the upper end side of the branch tube portion to provide a pressure contact member, the seal plug is pulled up, and the upper seal member is pressed against the pressure contact member in the vertical direction. Let Thereby, it can prevent reliably that a fluid leaks outside through between the outer peripheral surface of a seal plug, and the inner peripheral surface of a branch cylinder part.

そして、このように上部シール部材を圧接部材に上下方向に圧接させてシールするようにしたことで、従来の分岐継手のように非常にシビアな寸法精度で上方シール部を加工形成することを不要にでき、製造歩掛かりを高めることが可能になる。 Since the upper seal member is pressed against the pressure contact member in the vertical direction in this way and sealed, it is not necessary to process and form the upper seal portion with very severe dimensional accuracy like a conventional branch joint. Therefore, it is possible to increase the manufacturing yield.

請求項２記載の分岐継手においては、環状の圧接部が分岐筒部内に配されるように、段部を分岐筒部の内周面に密接させながら分岐筒部の上端側に圧入（嵌入）したり、分岐筒部の上端にフランジ部をネジ留めするなどして、外周縁側を分岐筒部の上端側に固定して圧接部材を着脱可能に取り付けることが可能になる。そして、このように設けた圧接部材の圧接部に、シールプラグを引き上げるとともに、上部シール部材を上下方向に圧接させることができる。これにより、流体がシールプラグの外周面と分岐筒部の内周面の間を通じて外部に漏出することを確実に防止することが可能になる。 In the branch joint according to claim 2, the stepped portion is in close contact with the inner peripheral surface of the branch tube portion so that the annular pressure contact portion is arranged in the branch tube portion, and is press-fitted (inserted) into the upper end side of the branch tube portion. Or by fixing the outer peripheral edge side to the upper end side of the branch cylinder part by screwing the flange part to the upper end of the branch cylinder part or the like. And while a seal plug is pulled up to the press-contact part of the press-contact member provided in this way, an upper seal member can be press-contacted to an up-down direction. As a result, it is possible to reliably prevent the fluid from leaking outside through the space between the outer peripheral surface of the seal plug and the inner peripheral surface of the branch tube portion.

請求項３記載の分岐継手においては、固定部の雌ネジを分岐筒部の上端側に形成された雄ネジに螺合させて、圧接部材を分岐筒部の上端側に設けるように構成されているため、容易に圧接部材を着脱することが可能になる。また、シールプラグを引き上げるとともに、圧接部材の圧接部に上部シール部材を上下方向に圧接させてシールすることができ、さらに、固定部の雌ネジと分岐筒部の雄ネジの螺合によってもシール効果を得ることができる。これにより、流体がシールプラグの外周面と分岐筒部の内周面の間を通じて外部に漏出することをより確実に防止することが可能になる。 In the branch joint according to claim 3, the female screw of the fixed part is screwed into the male screw formed on the upper end side of the branch cylinder part, and the pressure contact member is provided on the upper end side of the branch cylinder part. Therefore, the pressure contact member can be easily attached and detached. In addition, the seal plug can be pulled up, and the upper seal member can be pressed in the vertical direction to the pressure contact portion of the pressure contact member for sealing, and the seal can also be sealed by screwing the female screw of the fixed portion and the male screw of the branch tube portion. An effect can be obtained. As a result, it is possible to more reliably prevent the fluid from leaking outside through the space between the outer peripheral surface of the seal plug and the inner peripheral surface of the branch tube portion.

本発明の一実施形態に係る分岐継手を示す断面図である。It is sectional drawing which shows the branch joint which concerns on one Embodiment of this invention. 本発明の一実施形態に係る分岐継手を示す分解図である。It is an exploded view showing a branch joint concerning one embodiment of the present invention. 本発明の一実施形態に係る分岐継手の圧接部材を示す断面図である。It is sectional drawing which shows the press-contact member of the branch joint which concerns on one Embodiment of this invention. 図３のＸ１−Ｘ１線矢視図であり、本発明の一実施形態に係る分岐継手の圧接部材を示す平面図である。FIG. 4 is a cross-sectional view taken along line X1-X1 in FIG. 3 and is a plan view showing a pressure contact member of a branch joint according to an embodiment of the present invention. 本発明の一実施形態に係る分岐継手の変形例を示す断面図である。It is sectional drawing which shows the modification of the branch joint which concerns on one Embodiment of this invention. 図５のＳ部を拡大した図であり、圧接部材及び分岐筒部の変形例を示す断面図である。It is the figure which expanded the S section of Drawing 5, and is a sectional view showing the modification of a pressure contact member and a branch cylinder part. 従来の分岐継手を示す断面図である。It is sectional drawing which shows the conventional branch joint. 従来の分岐継手を示す分解図である。It is an exploded view which shows the conventional branch joint.

以下、図１から図４を参照し、本発明の一実施形態に係る分岐継手について説明する。本実施形態は、水道管やガス管等を分岐する際に用いられ、水やガス等の流体を本管１に流通させた状態で枝管１８の取り付け／取り外しを行うことができ、また、任意に本管１と枝管１８の間を遮断／開放（閉栓／開栓）することができる分岐継手に関するものである。よって、本実施形態では、図７及び図８に示した従来の分岐継手Ａと同様の構成に対して同一符号を付して説明を行う。 Hereinafter, a branch joint according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. This embodiment is used when branching a water pipe or a gas pipe, and can attach / remove the branch pipe 18 in a state where a fluid such as water or gas is circulated through the main pipe 1, The present invention relates to a branch joint capable of optionally blocking / opening (closing / opening) between the main pipe 1 and the branch pipe 18. Therefore, in this embodiment, the same reference numerals are assigned to the same components as those of the conventional branch joint A shown in FIGS.

本実施形態の分岐継手Ｂは、ポリエチレン等の合成樹脂を用いて形成され、従来の分岐継手Ａと同様、図１及び図２に示すように、本管１の外周面１ａに固着される円弧板状のサドル部２と、サドル部２に下端を繋げて一体形成され、サドル部２の外周面２ａから径方向外側に突設された円筒状の分岐筒部３と、分岐筒部３の外周面３ａに一端を繋げて一体形成され、分岐筒部３の径方向外側に延設された円筒状の枝管接続部４とからなる継手本体５を備えて構成されている。 The branch joint B of the present embodiment is formed using a synthetic resin such as polyethylene, and is arcuately fixed to the outer peripheral surface 1a of the main pipe 1 as shown in FIGS. A plate-shaped saddle portion 2, a cylindrical branch tube portion 3 integrally formed with a lower end connected to the saddle portion 2, and projecting radially outward from the outer peripheral surface 2 a of the saddle portion 2; One end of the outer peripheral surface 3 a is connected to the outer peripheral surface 3 a, and the joint main body 5 is formed of a cylindrical branch pipe connecting portion 4 that extends outward in the radial direction of the branch tube portion 3.

さらに、本実施形態の分岐継手Ｂにおいては、分岐筒部３内に、分岐筒部３の軸線Ｏ１方向（上下方向）に進退自在に設けられたシールプラグ２０と、分岐筒部３の上端３ｂ側に着脱可能に取り付けられたシールキャップ７を備えるとともに、分岐筒部３の上端３ｂ側に着脱可能に取り付けられてシールキャップ７と分岐筒部３の上端３ｂの間に介設された圧接部材２１を備えて構成されている。 Further, in the branch joint B of the present embodiment, the seal plug 20 provided in the branch tube portion 3 so as to be movable back and forth in the direction of the axis O1 (vertical direction) of the branch tube portion 3, and the upper end 3b of the branch tube portion 3. A pressure cap member provided between the seal cap 7 and the upper end 3b of the branch cylinder part 3 detachably attached to the upper end 3b side of the branch cylinder part 3 21 is comprised.

また、本実施形態の分岐継手Ｂはエレクトロフュージョン継手であり、サドル部２には、ニクロム線などの電熱線（不図示）が埋設されている。さらに、分岐筒部３を挟んでサドル部２の軸線Ｏ３方向両側には、電熱線の両端部にそれぞれ接続して一対のターミナルピン（不図示）が設けられている。これら一対のターミナルピンは、サドル部２の外周面２ａから径方向外側に突設されている。また、ターミナルピンを保護するとともにコントローラ（通電装置）のケーブルコネクタを取り付けるための筒状のコネクタ取付部（不図示）が、各ターミナルピンの中心軸線を中心に、サドル部２の外周面２ａから径方向に突出して一体に設けられている。 Further, the branch joint B of the present embodiment is an electrofusion joint, and a heating wire (not shown) such as a nichrome wire is embedded in the saddle portion 2. Further, a pair of terminal pins (not shown) are provided on both sides of the saddle portion 2 in the direction of the axis O3 with the branch tube portion 3 interposed therebetween, respectively connected to both ends of the heating wire. The pair of terminal pins protrudes radially outward from the outer peripheral surface 2 a of the saddle portion 2. Further, a cylindrical connector mounting portion (not shown) for protecting the terminal pin and mounting the cable connector of the controller (energizing device) is formed from the outer peripheral surface 2a of the saddle portion 2 around the central axis of each terminal pin. It protrudes in the radial direction and is provided integrally.

分岐筒部３は、サドル部２の周方向及び径方向の中央に下端を繋げ、その内孔がサドル部２の内周面２ｂに開口するように設けられている。また、この分岐筒部３は、上端３ｂから下端３ｃ側までの部分に、内周面３ｄに雌ネジの螺刻を施した雌ネジ部８を設け、雌ネジ部８から下端３ｃまでの部分に、内周面３ｄを軸線Ｏ１方向に沿うストレート面１０ａとして形成した下方シール部１０を設けて形成されている。さらに、下方シール部１０は、雌ネジ部８よりも内孔を縮径して形成されている。また、上端３ｂ側の外周面３ａに、シールキャップ７を螺合して取り付けるための雄ネジ部１１を備えて形成されている。 The branch cylinder part 3 is provided so that the lower end is connected to the center in the circumferential direction and the radial direction of the saddle part 2, and an inner hole thereof opens to the inner peripheral surface 2 b of the saddle part 2. Further, the branch tube portion 3 is provided with a female screw portion 8 in which a female screw is engraved on the inner peripheral surface 3d in a portion from the upper end 3b to the lower end 3c side, and a portion from the female screw portion 8 to the lower end 3c. Further, the lower seal portion 10 is formed by forming the inner peripheral surface 3d as a straight surface 10a along the direction of the axis O1. Further, the lower seal portion 10 is formed by reducing the inner diameter of the inner screw portion 8. Moreover, it forms with the external thread part 11 for screwing and attaching the seal cap 7 to the outer peripheral surface 3a by the side of the upper end 3b.

枝管接続部４は、一端を分岐筒部３の雌ネジ部８の下端３ｃ側に繋げ、その内孔が分岐筒部３の内孔に連通するように設けられている。また、この枝管接続部４は、その軸線Ｏ４をサドル部２の軸線Ｏ３及び分岐筒部３の軸線Ｏ１に直交する方向に向けて延設されている。 The branch pipe connecting portion 4 is provided so that one end thereof is connected to the lower end 3 c side of the female screw portion 8 of the branch cylinder portion 3 and the inner hole thereof communicates with the inner hole of the branch cylinder portion 3. Further, the branch pipe connecting portion 4 is extended in a direction perpendicular to the axis O4 of the saddle portion 2 and the axis O1 of the branch cylinder portion 3 with the axis O4 thereof.

本実施形態のシールプラグ２０は、略円柱状に形成されるとともに、軸線Ｏ２方向上端２０ａ側と下端２０ｂ側に、環状の上部保持溝２２と下部保持溝１３を設けて形成されている。また、下部保持溝１３は、従来の分岐継手Ａのシールプラグ６と同様、下端２０ｂ側の外周面２０ｃから径方向内側に凹み、周方向に繋がって環状に形成されている。一方、本実施形態のシールプラグ２０においては、上部保持溝２２が、シールプラグ２０の上端面２０ａに形成されており、上端面２０ａから軸線Ｏ２方向下端２０ｂ側に向けて凹み、且つ軸線Ｏ２中心の周方向に繋がって環状に形成されている。そして、下部保持溝１３に下部Ｏリング（下部シール部材）１５が、上部保持溝２２に上部Ｏリング（上部シール部材）２３がそれぞれ嵌合して取り付けられている。このとき、上部Ｏリング２３は、その一部がシールプラグ２０の上端面２０ａから軸線Ｏ２方向上方に突出するようにしてシールプラグ２０の上端面２０ａに取り付けられている。 The seal plug 20 of the present embodiment is formed in a substantially columnar shape, and is formed by providing an annular upper holding groove 22 and a lower holding groove 13 on the upper end 20a side and the lower end 20b side in the axis O2 direction. Similarly to the seal plug 6 of the conventional branch joint A, the lower holding groove 13 is recessed inward in the radial direction from the outer peripheral surface 20c on the lower end 20b side, and is formed in an annular shape connected in the circumferential direction. On the other hand, in the seal plug 20 of the present embodiment, the upper holding groove 22 is formed in the upper end surface 20a of the seal plug 20, is recessed from the upper end surface 20a toward the lower end 20b in the axis O2 direction, and is centered on the axis O2. It is connected in the circumferential direction and is formed in an annular shape. A lower O-ring (lower seal member) 15 is fitted in the lower holding groove 13 and an upper O-ring (upper seal member) 23 is fitted in the upper holding groove 22. At this time, the upper O-ring 23 is attached to the upper end surface 20a of the seal plug 20 so that a part thereof protrudes upward from the upper end surface 20a of the seal plug 20 in the axis O2 direction.

また、このシールプラグ２０は、従来の分岐継手Ａのシールプラグ６と同様に、上端２０ａと下部保持溝１３の間の中間部分の外周面２０ｃに雄ネジ１６の螺刻が施され、この外周面２０ｃの雄ネジ１６を分岐筒部３の雌ネジ８に螺合させて分岐筒部３内に設けられている。さらに、シールプラグ２０には、上端（上端面）２０ａから下端２０ｂ側に向けて凹む係合孔１７が軸線Ｏ２上に形成されている。 Further, in the same manner as the seal plug 6 of the conventional branch joint A, this seal plug 20 is threaded with a male screw 16 on the outer peripheral surface 20c of the intermediate portion between the upper end 20a and the lower holding groove 13. The male screw 16 of the surface 20 c is screwed into the female screw 8 of the branch cylinder part 3 and is provided in the branch cylinder part 3. Further, the seal plug 20 is formed with an engagement hole 17 which is recessed from the upper end (upper end surface) 20a toward the lower end 20b side on the axis O2.

圧接部材２１は、図３及び図４に示すように、例えば金属や硬質樹脂を用いて、円環状に形成されている。また、本実施形態の圧接部材２１は、環状の圧接部２５と、圧接部２５の外周縁２５ａに一端を繋げて上方に延設され、且つ圧接部２５の外周縁２５ａに沿って延設された段部２６と、段部２６の他端に一端を繋げて径方向外側に延設され、且つ段部２６の他端に沿って延設されたフランジ部２７とを備えて形成されている。また、圧接部２５は、その外径が分岐筒部３の上端３ｂ側の内径と略同等の径寸法で形成され、内径がシールプラグ２０の係合孔１７の内径と同等あるいはそれ以上の径寸法で形成されている。 As shown in FIGS. 3 and 4, the press contact member 21 is formed in an annular shape using, for example, metal or hard resin. Further, the pressure contact member 21 of the present embodiment is connected to one end of the annular pressure contact portion 25 and the outer peripheral edge 25a of the pressure contact portion 25 and extends upward, and extends along the outer peripheral edge 25a of the pressure contact portion 25. The step portion 26 is connected to the other end of the step portion 26 so as to extend outward in the radial direction, and the flange portion 27 extends along the other end of the step portion 26. . Further, the outer diameter of the pressure contact portion 25 is formed to be substantially the same as the inner diameter of the branch tube portion 3 on the upper end 3 b side, and the inner diameter is equal to or larger than the inner diameter of the engagement hole 17 of the seal plug 20. It is formed with dimensions.

そして、圧接部材２１は、図１に示すように、環状の圧接部２５が分岐筒部３の上端３ｂ側から内部に配されるように圧入（嵌入）して、分岐筒部３の上端３ｂ側に着脱可能に取り付けられている。このとき、段部２６の外周面２６ａが分岐筒部３の内周面３ｄに密着するように、且つフランジ部２７の下面が分岐筒部３の上端面３ｂに密着するように圧入されて、圧接部材２１は、その外周縁２１ａ側を分岐筒部３の上端３ｂ側に固定して設けられている。また、分岐筒部３の上端３ｂ側の外周面３ａに形成された雄ネジ１１に雌ネジ７ａを螺合させてシールキャップ７を取り付けるとともに、このシールキャップ７に圧接部材２１のフランジ部２７が押圧され（シールキャップ７と分岐筒部３の上端３ｂでフランジ部２７が挟み込まれ）、これにより、圧接部材２１は、確実且つ強固に外周縁２１ａ側を分岐筒部３の上端３ｂ側に固定して設けられている。 As shown in FIG. 1, the press contact member 21 is press-fitted (inserted) so that the annular press contact portion 25 is arranged from the upper end 3 b side of the branch tube portion 3 to the upper end 3 b of the branch tube portion 3. It is detachably attached to the side. At this time, the outer peripheral surface 26a of the step portion 26 is press-fitted so that the outer peripheral surface 26a of the branch tube portion 3 is in close contact with the inner peripheral surface 3d of the branch tube portion 3, and the lower surface of the flange portion 27 is in close contact with the upper end surface 3b of the branch tube portion 3. The pressure contact member 21 is provided with its outer peripheral edge 21 a side fixed to the upper end 3 b side of the branch tube portion 3. Further, the male screw 11 a formed on the outer peripheral surface 3 a on the upper end 3 b side of the branch tube portion 3 is screwed with the female screw 7 a to attach the seal cap 7, and the flange portion 27 of the pressure contact member 21 is attached to the seal cap 7. When pressed (the flange portion 27 is sandwiched between the seal cap 7 and the upper end 3b of the branch tube portion 3), the pressure contact member 21 securely and firmly fixes the outer peripheral edge 21a side to the upper end 3b side of the branch tube portion 3. Is provided.

このように構成した本実施形態の分岐継手Ｂは、図１（ａ）に示すように、回転工具によってシールプラグ２０を一方向に回転させ、分岐筒部３の所定の下方位置まで下げると、本管１と枝管接続部４の間を遮断した閉栓状態になる。そして、この閉栓状態では、従来の分岐継手Ａと同様に、下部Ｏリング１５が分岐筒部３の下方シール部１０のストレート面１０ａに横方向に圧接されて、流体がシールプラグ２０の外周面２０ｃと分岐筒部３の内周面３ｄの間を通じて外部に漏出することが防止される。 As shown in FIG. 1A, the branch joint B of the present embodiment configured in this way rotates the seal plug 20 in one direction with a rotary tool and lowers it to a predetermined lower position of the branch cylinder portion 3. The main pipe 1 and the branch pipe connecting portion 4 are closed. In this closed state, similarly to the conventional branch joint A, the lower O-ring 15 is laterally pressed against the straight surface 10 a of the lower seal portion 10 of the branch cylinder portion 3, and the fluid is placed on the outer peripheral surface of the seal plug 20. Leakage to the outside through the space between 20c and the inner peripheral surface 3d of the branch cylinder portion 3 is prevented.

一方、図１（ｂ）に示すように、回転工具によってシールプラグ２０を他方向に回転させ、分岐筒部３の所定の上方位置まで引き上げると、シールプラグ２０の上端面２０ａに取り付けられた上部Ｏリング２３が圧接部材２１の圧接部２５に上下方向に圧接してシールされる。そして、このように、本実施形態の分岐継手Ｂは、上部Ｏリング２３を分岐筒部３の上方シール部９のストレート面９ａに横方向に圧接させてシールするのではなく、上部Ｏリング２３が圧接部材２１に上下方向に圧接してシールするように構成されているため、分岐筒部３の上端３ｂ側（上方シール部９）に撓みが生じている場合であっても、所定の上方位置までシールプラグ２０を引き上げるとともに、十分な上部Ｏリング２３の圧縮率（圧接力）を確保して、上部Ｏリング２３が圧接部材２１に圧接される。 On the other hand, as shown in FIG. 1B, when the seal plug 20 is rotated in the other direction by a rotary tool and pulled up to a predetermined upper position of the branch tube portion 3, the upper portion attached to the upper end surface 20a of the seal plug 20 The O-ring 23 is pressed against the pressure contact portion 25 of the pressure contact member 21 in the vertical direction and sealed. In this way, the branch joint B of the present embodiment does not seal the upper O-ring 23 by pressing the upper O-ring 23 laterally against the straight surface 9 a of the upper seal portion 9 of the branch cylinder portion 3. Is configured to press and seal against the pressure contact member 21 in the vertical direction, so that even when the upper end 3b side (upper seal portion 9) of the branch tube portion 3 is bent, a predetermined upper portion is formed. The seal plug 20 is pulled up to the position, and a sufficient compression rate (pressure contact force) of the upper O-ring 23 is secured, so that the upper O-ring 23 is pressed against the pressure contact member 21.

このため、従来の分岐継手Ａのように非常にシビアな寸法精度で上方シール部９を加工形成することなく、流体がシールプラグ２０の外周面２０ｃと分岐筒部３の内周面３ｄの間を通じて外部に漏出することが防止される。 For this reason, the fluid does not form the upper seal portion 9 with very severe dimensional accuracy as in the conventional branch joint A, and the fluid flows between the outer peripheral surface 20c of the seal plug 20 and the inner peripheral surface 3d of the branch cylinder portion 3. Leakage to the outside is prevented.

したがって、本実施形態の分岐継手Ｂによれば、シールプラグ２０の上端面２０ｂに上部Ｏリング２３を取り付け、シールプラグ２０を引き上げて圧接部材２１に上部Ｏリング２３を上下方向に圧接させることにより、流体がシールプラグ２０の外周面２０ｃと分岐筒部３の内周面３ｄの間を通じて外部に漏出することを確実に防止することができる。 Therefore, according to the branch joint B of the present embodiment, the upper O-ring 23 is attached to the upper end surface 20b of the seal plug 20, and the seal plug 20 is pulled up to press the upper O-ring 23 against the pressure contact member 21 in the vertical direction. , It is possible to reliably prevent the fluid from leaking outside through the space between the outer peripheral surface 20c of the seal plug 20 and the inner peripheral surface 3d of the branch cylinder portion 3.

そして、このように上部Ｏリング２３を圧接部材２１に上下方向に圧接させてシールするようにしたことで、従来の分岐継手Ａのように非常にシビアな寸法精度で上方シール部９を加工形成することを不要にでき、製造歩掛かりを高めることが可能になる。 In this way, the upper O-ring 23 is pressed against the pressure contact member 21 in the vertical direction and sealed, so that the upper seal portion 9 is formed with a very severe dimensional accuracy like the conventional branch joint A. This eliminates the need to do this and increases the manufacturing yield.

また、本実施形態の分岐継手Ｂにおいては、環状の圧接部２５が分岐筒部３内に配されるように、段部２６を分岐筒部３の内周面３ｄに密接させながら分岐筒部３の上端３ｂ側に圧入して、圧接部材２１を分岐筒部３の上端３ｂ側に固定して取り付けることが可能になる。そして、このように設けた圧接部材２１の圧接部２５に、シールプラグ２０を引き上げるとともに、上部Ｏリング２３を上下方向に圧接させることができる。これにより、流体がシールプラグ２０の外周面２０ｃと分岐筒部３の内周面３ｄの間を通じて外部に漏出することを確実に防止することが可能になる。 Further, in the branch joint B of the present embodiment, the branch cylinder part is brought into close contact with the inner peripheral surface 3d of the branch cylinder part 3 so that the annular pressure contact part 25 is arranged in the branch cylinder part 3. 3 is press-fitted into the upper end 3b side, and the pressure contact member 21 can be fixedly attached to the upper end 3b side of the branch tube portion 3. Then, the seal plug 20 can be pulled up to the pressure contact portion 25 of the pressure contact member 21 provided in this way, and the upper O-ring 23 can be pressed in the vertical direction. As a result, it is possible to reliably prevent the fluid from leaking outside through the space between the outer peripheral surface 20c of the seal plug 20 and the inner peripheral surface 3d of the branch cylinder portion 3.

以上、本発明に係る分岐継手の一実施形態について説明したが、本発明は上記の一実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。例えば、本実施形態では、圧接部材２１が、環状の圧接部２５と段部２６とフランジ部２７とを備えて形成され、圧接部２５が分岐筒部３の上端３ｂ側からその内部に配されるように圧入（嵌入）して、分岐筒部３の上端３ｂ側に着脱可能に取り付けられているものとした。これに対し、例えば、分岐筒部３の上端３ｂにフランジ部２７をネジ留めするなどして、外周縁２１ａ側を分岐筒部３の上端３ｂ側に固定して圧接部材２１を取り付けるようにしてもよく、この場合においても勿論、本実施形態と同様の作用効果を得ることが可能である。 As mentioned above, although one embodiment of the branch joint according to the present invention has been described, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist thereof. For example, in the present embodiment, the press contact member 21 is formed to include an annular press contact portion 25, a step portion 26, and a flange portion 27, and the press contact portion 25 is arranged inside the branch cylinder portion 3 from the upper end 3 b side. In this way, it was press-fitted (inserted) so as to be detachably attached to the upper end 3 b side of the branch tube portion 3. On the other hand, for example, the flange portion 27 is screwed to the upper end 3b of the branch tube portion 3 so that the outer peripheral edge 21a side is fixed to the upper end 3b side of the branch tube portion 3 and the pressure contact member 21 is attached. Of course, even in this case, it is possible to obtain the same effects as those of the present embodiment.

また、図５及び図６に示すように、環状の圧接部３０と、圧接部３０の外周縁３０ａに一端を繋げて下方に延設されるとともに、内周面３１ａに雌ネジ３２の螺刻が施された固定部３１とを備えて圧接部材３３を形成し、且つ、分岐筒部３の上端３ｂ側に、シールキャップ７を螺合させる雄ネジ１１を形成した外周面３ａよりも縮径した外周面３ａを形成するとともに、この縮径した外周面３ａにも雄ネジ３４を施して分岐筒部３を形成してもよい。この場合には、固定部３１の雌ネジ３２を分岐筒部３の雄ネジ３４に螺合させて、圧接部材３３を分岐筒部３の上端３ｂ側に着脱可能に取り付けることができ、容易に圧接部材３３を着脱することが可能になる。また、圧接部材３３の圧接部３０に、シールプラグ２０を引き上げるとともに、上部Ｏリング２３を上下方向に圧接させてシールすることができ、さらに、固定部３１の雌ネジ３２と分岐筒部３の雄ネジ３４の螺合によってもシール効果を得ることができる。このため、流体がシールプラグ２０の外周面２０ｃと分岐筒部３の内周面３ｄの間を通じて外部に漏出することをより確実に防止することが可能になる。 As shown in FIGS. 5 and 6, one end is connected to the annular pressure contact portion 30 and the outer peripheral edge 30a of the pressure contact portion 30 so as to extend downward, and a female screw 32 is threaded on the inner peripheral surface 31a. And a fixed contact portion 31 formed with the outer peripheral surface 3a having a male screw 11 for screwing the seal cap 7 on the upper end 3b side of the branch tube portion 3. In addition to forming the outer peripheral surface 3a, the branched cylindrical portion 3 may be formed by applying a male screw 34 to the outer peripheral surface 3a having a reduced diameter. In this case, the female screw 32 of the fixing portion 31 is screwed into the male screw 34 of the branch tube portion 3 so that the pressure contact member 33 can be detachably attached to the upper end 3b side of the branch tube portion 3. The pressure contact member 33 can be attached and detached. In addition, the seal plug 20 can be pulled up to the press contact portion 30 of the press contact member 33 and the upper O-ring 23 can be pressed in the vertical direction to seal, and the female screw 32 of the fixing portion 31 and the branch tube portion 3 can be sealed. The sealing effect can also be obtained by screwing the male screw 34. For this reason, it becomes possible to more reliably prevent the fluid from leaking outside through the space between the outer peripheral surface 20c of the seal plug 20 and the inner peripheral surface 3d of the branch cylinder portion 3.

１本管
１ａ外周面
２サドル部
２ａ外周面
２ｂ内周面
３分岐筒部
３ａ外周面
３ｂ上端（上端面）
３ｃ下端
３ｄ内周面
４枝管接続部
５継手本体
６従来のシールプラグ
６ａ上端
６ｂ下端
６ｃ外周面
７シールキャップ
７ａ雌ネジ
８雌ネジ部（雌ネジ）
９上方シール部
９ａストレート面
１０下方シール部
１０ａストレート面
１１雄ネジ部（雄ネジ）
１２上部保持溝
１３下部保持溝
１４上部Ｏリング（上部シール部材）
１５下部Ｏリング（下部シール部材）
１６雄ネジ
１７係合孔
１８枝管
１９穿孔
２０シールプラグ
２０ａ上端（上端面）
２０ｂ下端
２０ｃ外周面
２１圧接部材
２１ａ外周縁
２２上部保持溝
２３上部Ｏリング（上部シール部材）
２５圧接部
２５ａ外周縁
２６段部
２６ａ外周縁
２７フランジ部
３０圧接部
３０ａ外周縁
３１固定部
３１ａ内周面
３２雌ネジ
３３圧接部材
３４雄ネジ
Ａ従来の分岐継手
Ｂ分岐継手
Ｏ１分岐筒部の軸線
Ｏ２シールプラグの軸線
Ｏ３サドル部の軸線
Ｏ４枝管接続部の軸線 1 main pipe 1a outer peripheral surface 2 saddle portion 2a outer peripheral surface 2b inner peripheral surface 3 branch tube portion 3a outer peripheral surface 3b upper end (upper end surface)
3c lower end 3d inner peripheral surface 4 branch pipe connecting portion 5 joint body 6 conventional seal plug 6a upper end 6b lower end 6c outer peripheral surface 7 seal cap 7a female screw 8 female screw part (female screw)
9 Upper seal portion 9a Straight surface 10 Lower seal portion 10a Straight surface 11 Male thread (male thread)
12 Upper holding groove 13 Lower holding groove 14 Upper O-ring (upper seal member)
15 Lower O-ring (lower seal member)
16 Male thread 17 Engagement hole 18 Branch pipe 19 Perforation 20 Seal plug 20a Upper end (upper end surface)
20b Lower end 20c Outer peripheral surface 21 Pressure contact member 21a Outer peripheral edge 22 Upper holding groove 23 Upper O-ring (upper seal member)
25 pressure contact portion 25a outer peripheral edge 26 stepped portion 26a outer peripheral edge 27 flange portion 30 pressure contact portion 30a outer peripheral edge 31 fixed portion 31a inner peripheral surface 32 female screw 33 pressure contact member 34 male screw A conventional branch joint B branch joint O1 branch tube portion Axis O2 Seal plug axis O3 Saddle part axis O4 Branch pipe joint part axis

Claims

An arcuate plate-shaped saddle portion fixed to the outer peripheral surface of the main pipe, a cylindrical branch tube portion integrally formed by connecting the lower end side in the axial direction to the saddle portion, and an axial direction on the outer peripheral surface of the branch tube portion In a branch joint comprising a cylindrical branch pipe connection part integrally formed by connecting one end side, and a seal plug provided in the branch cylinder part so as to be movable forward and backward in the axial direction of the branch cylinder part,
A pressure contact member that is formed in an annular shape and is detachably fixed to the upper end side of the branch tube portion; and an annular upper seal member that is attached to the upper end surface of the seal plug,
A branch joint, wherein the seal plug is pulled up to the upper end side of the branch tube portion, and the upper seal member is configured to press and seal the pressure contact member in the vertical direction.

The branch joint according to claim 1,
The pressure contact member includes an annular pressure contact portion, a step portion extending upward with one end connected to an outer peripheral edge of the pressure contact portion, and one end connected to the other end of the step portion and extending radially outward. A branch joint characterized by being provided with a flange portion.

The branch joint according to claim 1,
The branch cylinder part is provided with a male screw on the outer peripheral surface on the upper end side,
The pressure contact member includes an annular pressure contact portion, and a fixing portion having one end connected to the outer peripheral edge of the pressure contact portion and extending downward, and an inner peripheral surface provided with a female screw. ,
A branch joint in which the female screw of the fixed part is screwed into the male screw of the branch cylinder part, and the pressure contact member is detachably provided on the upper end side of the branch cylinder part.