JP6247126B2 - Pipe connection structure - Google Patents

Pipe connection structure Download PDF

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JP6247126B2
JP6247126B2 JP2014059088A JP2014059088A JP6247126B2 JP 6247126 B2 JP6247126 B2 JP 6247126B2 JP 2014059088 A JP2014059088 A JP 2014059088A JP 2014059088 A JP2014059088 A JP 2014059088A JP 6247126 B2 JP6247126 B2 JP 6247126B2
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flange
pipe
divided members
connection structure
ring member
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JP2015183731A (en
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澤田 実
実 澤田
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Kubota Corp
Cosmo Koki Co Ltd
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Cosmo Koki Co Ltd
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本発明は、流路構成部材同士を密封接続する管接続構造に関する。   The present invention relates to a pipe connection structure for hermetically connecting flow path components.

従来の流路構成部材同士を密封接続する管接続構造としては、一方の流路構成部材に形成されたフランジと他方の流路構成部材に形成されたフランジとをボルト・ナットの締結により接続するものが知られている。しかしながら、このようにボルト・ナットの締結による管接続構造は、地震等の外力が加わった場合、両フランジを相対移動させる力がボルト・ナットに集中し、ボルト・ナットの緩みや破損によって流体の漏出が生じたり、ボルト・ナットに電気的に接触する各種部材が異種金属である場合、腐食が生じてしまう虞があるばかりか、ボルト・ナットの締結作業に時間を要するとともに、作業も煩雑なものとなっている。   As a conventional pipe connection structure for sealingly connecting the flow path component members, a flange formed on one flow path component member and a flange formed on the other flow path component member are connected by fastening bolts and nuts. Things are known. However, in this pipe connection structure by tightening bolts and nuts, when an external force such as an earthquake is applied, the force to move both flanges relative to the bolts and nuts concentrates on the bolts and nuts. When various members that come into contact with bolts and nuts are made of different metals, there is a risk of corrosion, and it takes time to fasten bolts and nuts, and the work is complicated. It has become a thing.

上記問題を解決する管接続構造として、例えば特許文献1のように、一方の流路構成部材のフランジに複数の爪が設けられ、他方の流路構成部材である樹脂管の外周に前記フランジに設けられた複数の爪の間に挿入可能な複数の爪を有する環状分割部材が固定され、フランジに設けられた複数の爪の間に環状分割部材の複数の爪を挿し込んだ状態で、環状分割部材を所定角度回転させることで両流路構成部材を連結する管接続構造(所謂バヨネット式)が知られている。   As a pipe connection structure that solves the above problem, for example, as in Patent Document 1, a plurality of claws are provided on the flange of one flow path component member, and the flange is formed on the outer periphery of the resin pipe that is the other flow path component member. An annular dividing member having a plurality of claws that can be inserted between the provided claws is fixed, and the annular dividing member is inserted into the annular claws between the plurality of claws provided on the flange. A pipe connection structure (so-called bayonet type) is known in which both flow path component members are connected by rotating a dividing member by a predetermined angle.

特開2009−41702号公報(第5頁、第1−2図)Japanese Unexamined Patent Publication No. 2009-41702 (page 5, FIG. 1-2)

しかしながら、特許文献1の管接続構造にあっては、環状分割部材を所定角度以上回転させて両流路構成部材を連結した際に、フランジに設けられた複数の爪と環状分割部材の複数の爪とが軸方向に重なるとともに、爪同士の空間も同様に軸方向に重なることになるため、地震による揺れ等の外力に抗し得るフランジ部の強度を確保するためには、フランジに所定以上の厚みを設ける必要がある。しかし、フランジを厚く形成すると、フランジを有する流路構成部材の重量が増大するといった問題がある。   However, in the pipe connection structure of Patent Document 1, when the annular divided member is rotated by a predetermined angle or more to connect both flow path component members, the plurality of claws provided on the flange and the plurality of annular divided members are provided. Since the claws overlap in the axial direction and the spaces between the claws overlap in the axial direction as well, in order to ensure the strength of the flange portion that can resist external forces such as shaking caused by an earthquake, the flange should be more than a predetermined amount. It is necessary to provide the thickness. However, when the flange is formed thick, there is a problem that the weight of the flow path component having the flange increases.

本発明は、このような問題点に着目してなされたもので、フランジを有する流路構成部材の重量を軽減できるとともに、地震による揺れ等の外力に抗し得る強度を有する管接続構造を提供することを目的とする。   The present invention has been made paying attention to such problems, and provides a pipe connection structure that can reduce the weight of a flow path component having a flange and has strength that can resist external forces such as shaking caused by an earthquake. The purpose is to do.

前記課題を解決するために、本発明の管接続構造は、
一方の流路構成部材の受口管部に他方の流路構成部材の挿口管部を挿入し、リング状の密封部材を介して接続する管接続構造であって、
前記受口管部に形成されたフランジと前記挿口管部に形成されたフランジとは、これら両フランジを一体に挟むことができる凹溝を有する複数の分割部材と、前記複数の分割部材の外周面を囲繞する無端状のリング部材と、により接続されており、前記リング部材は、前記複数の分割部材における前記流路構成部材の管軸方向の一方端に係止されることを特徴としている。
この特徴によれば、受口管部及び挿口管部に形成されたフランジは複数の分割部材により一体に挟まれ、これら複数の分割部材が無端状のリング部材により前記両フランジからの脱落が防止されている。そのため、両フランジに加えて別体の分割部材によりフランジ部分の強度を確保でき、同時に流路構成部材自体のフランジの重量を軽減できることとなる。
In order to solve the above-described problem, the pipe connection structure of the present invention includes:
Inserting the insertion tube portion of the other flow path component member into the receiving tube portion of one flow channel component member, and a pipe connection structure for connecting via a ring-shaped sealing member,
The flange formed in the receiving tube portion and the flange formed in the insertion tube portion include a plurality of divided members having concave grooves capable of sandwiching both the flanges, and the plurality of divided members. And an endless ring member surrounding the outer peripheral surface, and the ring member is locked to one end of the plurality of divided members in the tube axis direction of the flow path component member. Yes.
According to this feature, the flanges formed in the receiving tube portion and the insertion tube portion are sandwiched integrally by a plurality of divided members, and the plurality of divided members can be detached from the flanges by endless ring members. It is prevented. Therefore, the strength of the flange portion can be ensured by a separate member in addition to both flanges, and at the same time, the weight of the flange of the flow path component member itself can be reduced.

前記両フランジは、相互に係合可能な凹部及び/または凸部を有することを特徴としている。
この特徴によれば、凹部及び/または凸部を係合させることで双方の流路構成部材を所定角度に容易に配置できるばかりか、両フランジの相対的な回転を防止することができる。
Both the flanges have a recess and / or a protrusion that can be engaged with each other.
According to this feature, by engaging the concave portion and / or the convex portion, both flow path constituting members can be easily arranged at a predetermined angle, and relative rotation of both flanges can be prevented.

一方の前記フランジの接続面には管軸方向に他方の前記フランジに向けて突出する凸部が形成され、他方の前記フランジには前記凸部が嵌合する切欠部が形成されていることを特徴としている。
この特徴によれば、両フランジの接続時に一方フランジの凸部が他方フランジの切欠部に嵌合することで、受口管部及び挿口管部の相対回転を防止することができる。
The connecting surface of one of the flanges is formed with a convex portion protruding toward the other flange in the tube axis direction, and the other flange is formed with a notch for fitting the convex portion. It is a feature.
According to this feature, when the two flanges are connected, the convex portion of the one flange is fitted into the cutout portion of the other flange, thereby preventing relative rotation of the receiving tube portion and the insertion tube portion.

前記複数の分割部材は、少なくとも2つの前記分割部材同士が離間するように前記両フランジに取付けられるようになっており、前記リング部材には、前記複数の分割部材における前記流路構成部材の管軸方向の一方端縁に係止される凸片が内径側に突出して形成され、該凸片は、前記分割部材同士の間を通過可能であることを特徴としている。
この特徴によれば、リング部材に設けられた凸片は、少なくとも2つの分割部材同士の間を通過して、複数の分割部材における流路構成部材の管軸方向の一方端縁に係止させることができ、簡単な構造で分割部材に対してリング部材を係合させることができる。
The plurality of divided members are attached to the flanges so that at least two of the divided members are separated from each other, and the ring member includes a pipe of the flow path constituting member in the plurality of divided members. A protruding piece locked to one end edge in the axial direction is formed to protrude toward the inner diameter side, and the protruding piece can pass between the divided members.
According to this feature, the convex piece provided on the ring member passes between at least two divided members and is locked to one end edge in the tube axis direction of the flow path component member in the plurality of divided members. The ring member can be engaged with the split member with a simple structure.

前記複数の分割部材は、外周面にそれぞれ一方方向に窄まるテーパが設けられており、前記リング部材の内周面には前記分割部材のテーパに面当接するテーパが設けられていることを特徴としている。
この特徴によれば、リング部材と分割部材との当接面にそれぞれテーパが設けられていることから、リング部材が複数の分割部材を前記両フランジ対して押し付けるように機能し、地震による揺れ等の外力に対する管接続構造の強度を高めることができる。
Each of the plurality of divided members is provided with a taper constricted in one direction on the outer peripheral surface, and a taper that abuts the taper of the divided member on the inner peripheral surface of the ring member is provided. It is said.
According to this feature, since the taper is provided on the contact surface between the ring member and the divided member, the ring member functions to press the plurality of divided members against the flanges, and the vibration due to the earthquake, etc. The strength of the pipe connection structure against external forces can be increased.

実施例における管接続構造を示す概略図である。It is the schematic which shows the pipe connection structure in an Example. 管接続構造を示す分解斜視図である。It is a disassembled perspective view which shows a pipe connection structure. 接続管の挿口部を分岐管部の受口部内に挿入した状態を示す正面断面図である。It is front sectional drawing which shows the state which inserted the insertion part of the connection pipe in the opening part of a branch pipe part. フランジ部分に対して分割部材を取付けた状態を示す側断面図である。It is a sectional side view which shows the state which attached the division member with respect to the flange part. 図4のA−A断面図である。It is AA sectional drawing of FIG. 図4の状態からリング部材を取付けた状態を示す側断面図である。It is a sectional side view which shows the state which attached the ring member from the state of FIG. 図6のB−B断面図である。It is BB sectional drawing of FIG. 図7の状態からリング部材を回転させた状態を示す平面断面図である。It is a top sectional view showing the state where the ring member was rotated from the state of FIG. リング部材の離脱防止状態を示す一部破断図である。It is a partially broken figure which shows the detachment | leave prevention state of a ring member. リング部材の回転移動を規制する手段を示す一部破断図である。It is a partially broken figure which shows the means which regulates the rotational movement of a ring member. 図10のC−C断面図である。It is CC sectional drawing of FIG. リング部材の回転移動を規制する変形例2の構成を示す斜視図である。It is a perspective view which shows the structure of the modification 2 which controls the rotational movement of a ring member. リング部材の回転移動を規制する変形例2を示す平面図である。It is a top view which shows the modification 2 which controls the rotational movement of a ring member. 管接続構造の周辺構造の一例を示す概略図である。It is the schematic which shows an example of the peripheral structure of a pipe connection structure.

本発明に係る管接続構造を実施するための形態を実施例に基づいて以下に説明する。   EMBODIMENT OF THE INVENTION The form for implementing the pipe | tube connection structure which concerns on this invention is demonstrated below based on an Example.

実施例に係る管接続構造につき、図1から図14を参照して説明する。図1に示すように、本実施例の流体管2は、水平に延びる流体管部2aと、流体管部2aの管軸から直交して延びる分岐管部2bと、を有するT字管である。この流体管2は、例えば、地中に埋設される上水道用のダクタイル鋳鉄製であり、断面視略円形状に形成され、内周面が粉体塗装あるいはモルタル層で被覆されている。尚、本発明に係る流体管は、その他鋳鉄、鋼等の金属製であってもよい。更に尚、流体管の内周面はモルタル層に限らず、例えばエポキシ樹脂等により被覆されてもよく、若しくは適宜の材料を粉体塗装により流体管の内周面に被覆してもよい。また、本実施例では流体管内の流体は上水であるが、流体管の内部を流れる流体は必ずしも上水に限らず、例えば工業用水や農業用水、下水等の他、ガスやガスと液体との気液混合体であっても構わない。   The pipe connection structure according to the embodiment will be described with reference to FIGS. As shown in FIG. 1, the fluid pipe 2 of the present embodiment is a T-shaped pipe having a fluid pipe portion 2a extending horizontally and a branch pipe portion 2b extending orthogonally from the tube axis of the fluid pipe portion 2a. . The fluid pipe 2 is made of, for example, ductile cast iron for waterworks buried in the ground, is formed in a substantially circular shape in cross section, and has an inner peripheral surface covered with powder coating or a mortar layer. The fluid pipe according to the present invention may be made of other metals such as cast iron and steel. Furthermore, the inner peripheral surface of the fluid pipe is not limited to the mortar layer, and may be coated with, for example, an epoxy resin or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe with powder coating. Further, in this embodiment, the fluid in the fluid pipe is clean water, but the fluid flowing in the fluid pipe is not necessarily limited to clean water, for example, industrial water, agricultural water, sewage, etc., gas, gas and liquid The gas-liquid mixture may be used.

本実施例では、一方の流路構成部材を流体管2の分岐管部2bとし、他方の流路構成部材を接続管3とするとともに、分岐管部2bと接続管3との管接続構造1について説明する。尚、本実施例では、分岐管部2bが受口形状の受口管部2cを有しており、接続管3は、分岐管部2bに挿入される挿口管部3aを有している。更に尚、本実施例の接続管3は、その上端に補修弁装置4が一体形成されており、補修弁装置4には、上方に延びる延長管5を介して消火栓6が連結されている。更に尚、延長管5を介さずに補修弁装置4に直接に消火栓6が連結されていてもよい。   In the present embodiment, one flow path component member is the branch pipe portion 2b of the fluid pipe 2, the other flow path component member is the connection pipe 3, and the pipe connection structure 1 between the branch pipe portion 2b and the connection pipe 3 is used. Will be described. In the present embodiment, the branch pipe part 2b has a receiving pipe-shaped receiving pipe part 2c, and the connecting pipe 3 has an insertion pipe part 3a inserted into the branch pipe part 2b. . Furthermore, a repair valve device 4 is integrally formed at the upper end of the connection pipe 3 of this embodiment, and a fire hydrant 6 is connected to the repair valve device 4 via an extension pipe 5 extending upward. Furthermore, the fire hydrant 6 may be directly connected to the repair valve device 4 without using the extension pipe 5.

図1及び図2に示されるように、管接続構造1は、受口管部2cに設けられるフランジ8と、挿口管部3aに設けられるフランジ9と、フランジ8とフランジ9とを連結する分割部材10,10と、分割部材10,10を固定するリング部材11と、から主に構成されている。尚、本実施例の分岐管部2bのフランジ8、接続管3のフランジ9、分割部材10,10、及びリング部材11は、ダクタイル鋳鉄製である。更に尚、これら管接続構造1を構成する各種部材は、自由な材料で構成してもよいが、金属製の場合、異種金属による腐食を防止するために同一種類の金属で構成することが好ましい。   As shown in FIG. 1 and FIG. 2, the pipe connection structure 1 connects the flange 8 provided in the receiving pipe part 2 c, the flange 9 provided in the insertion pipe part 3 a, and the flange 8 and the flange 9. It is mainly comprised from the division members 10 and 10 and the ring member 11 which fixes the division members 10 and 10. As shown in FIG. In addition, the flange 8 of the branch pipe part 2b of this embodiment, the flange 9 of the connecting pipe 3, the divided members 10 and 10, and the ring member 11 are made of ductile cast iron. Further, the various members constituting the pipe connection structure 1 may be made of any material, but in the case of being made of metal, it is preferably made of the same type of metal in order to prevent corrosion due to different metals. .

分岐管部2bのフランジ8は、分岐管部2bの端部から外径方向に水平に張り出した平面視環状に形成されており、またフランジ8は、接続面8aから接続管3側に突起した凸部8bが、周方向に等間隔離間して2箇所に形成されている。本実施例では凸部8bは、接続管3のフランジ9の厚みと同一の高さ突出している。   The flange 8 of the branch pipe portion 2b is formed in an annular shape in a plan view and extends horizontally from the end of the branch pipe portion 2b in the outer diameter direction, and the flange 8 protrudes from the connection surface 8a toward the connection pipe 3 side. Protrusions 8b are formed at two locations at equal intervals in the circumferential direction. In the present embodiment, the convex portion 8 b protrudes at the same height as the thickness of the flange 9 of the connecting pipe 3.

接続管3のフランジ9は、接続管3の端部から接続管3の軸方向に所定間隔離間した位置に形成されており、当該フランジ9の外径は、分岐管部2bのフランジ8の外径と略同径となっている。また、接続管3の端部からフランジ9までの部位が、該接続管3の挿口管部3aとして機能している。この挿口管部3aの外周面には、環状の凹条3b,3bが軸方向に離間して形成されており、凹条3b,3bには、本実施例における密封部材としての環状のシールリング12,12が嵌合配置されている。   The flange 9 of the connecting pipe 3 is formed at a position spaced apart from the end of the connecting pipe 3 in the axial direction of the connecting pipe 3, and the outer diameter of the flange 9 is outside the flange 8 of the branch pipe portion 2b. The diameter is substantially the same as the diameter. Further, a portion from the end of the connecting pipe 3 to the flange 9 functions as the insertion tube part 3 a of the connecting pipe 3. Annular recesses 3b and 3b are formed on the outer peripheral surface of the insertion tube portion 3a so as to be separated from each other in the axial direction. The recesses 3b and 3b have an annular seal as a sealing member in this embodiment. The rings 12 and 12 are fitted and arranged.

また、フランジ9は、外周端から径方向に切り欠かれた切欠部9aが、周方向に等間隔離間して4箇所に形成されている。すなわち、この切欠部9aは、分岐管部2bのフランジ8の凸部8bに対して相互に係合可能な凹部として機能している。尚、本実施例では、フランジ8の凸部8bが2箇所に形成されているのに対し、フランジ9の切欠部9aが4箇所に形成されているため、フランジ9を構成する補修弁装置4の操作部4bの位置を適宜に変更できる。   Further, the flange 9 is formed with four notches 9a that are notched in the radial direction from the outer peripheral end and spaced apart at equal intervals in the circumferential direction. That is, the notch 9a functions as a recess that can be engaged with the protrusion 8b of the flange 8 of the branch pipe portion 2b. In the present embodiment, the convex portion 8b of the flange 8 is formed at two locations, whereas the notch portion 9a of the flange 9 is formed at four locations, so that the repair valve device 4 constituting the flange 9 is provided. The position of the operation unit 4b can be changed as appropriate.

分割部材10,10は、フランジ8及びフランジ9の外径と同径あるいは大きい内径を有する環状部材を半割にした形状を成している。そのため、分割部材10は、フランジ8及びフランジ9に取り付け容易となっている。また、分割部材10は、両側縁が内面側に突起する壁部10a,10aを有し、これら壁部10a,10aの間に該分割部材10の内面に沿う凹溝10bが形成されている。この凹溝10bは、接続管3を分岐管部2bに挿入時に重なり合ったフランジ8とフランジ9を挟み込むように外嵌可能となっている。また、分割部材10の外周面は、一方方向に窄まるテーパ面10cに形成されている。尚、分割部材は、半割形状に限られず、3つ以上に複数分割されていてもよい。   The divided members 10 and 10 have a shape in which an annular member having an inner diameter that is the same as or larger than the outer diameter of the flange 8 and the flange 9 is halved. Therefore, the split member 10 can be easily attached to the flange 8 and the flange 9. Further, the dividing member 10 has wall portions 10a and 10a whose both side edges protrude toward the inner surface side, and a concave groove 10b along the inner surface of the dividing member 10 is formed between the wall portions 10a and 10a. The concave groove 10b can be externally fitted so as to sandwich the flange 8 and the flange 9 that overlap each other when the connection pipe 3 is inserted into the branch pipe portion 2b. Moreover, the outer peripheral surface of the division member 10 is formed in the taper surface 10c which narrows in one direction. The divided member is not limited to a half shape, and may be divided into a plurality of divided members.

リング部材11は、フランジ8及びフランジ9に対して外嵌された分割部材10,10を囲繞可能な無端状のリング部13と、リング部13の軸方向に直交する線上の位置に外径側に突出するハンドル部14,14と、を有している。リング部13の内周面は、分割部材10のテーパ面10cと平行なテーパ面13aに形成されている。また、ハンドル部14は、リング部13のテーパ面13aの拡径側端部にリング部13の内面よりも内側に突起する凸片15を有している(図4参照)。   The ring member 11 includes an endless ring portion 13 that can surround the split members 10 and 10 that are externally fitted to the flange 8 and the flange 9, and an outer diameter side at a position on a line perpendicular to the axial direction of the ring portion 13. And handle portions 14 and 14 projecting from each other. The inner peripheral surface of the ring portion 13 is formed on a tapered surface 13 a parallel to the tapered surface 10 c of the dividing member 10. Moreover, the handle | steering-wheel part 14 has the convex piece 15 which protrudes inward rather than the inner surface of the ring part 13 in the diameter expansion side end part of the taper surface 13a of the ring part 13 (refer FIG. 4).

次に、分岐管部2bと接続管3とを接続する手順について説明する。先ず、図3に示されるように、接続管3をリング部材11のリング部13内に挿通させ、接続管3の任意の切欠部9a,9aに分岐管部2bのフランジ8の凸部8b,8bが嵌合する位置に合わせ、接続管3の挿口管部3aを分岐管部2bの受口管部2c内に挿入する。   Next, a procedure for connecting the branch pipe portion 2b and the connection pipe 3 will be described. First, as shown in FIG. 3, the connecting pipe 3 is inserted into the ring portion 13 of the ring member 11, and the protrusions 8 b of the flange 8 of the branch pipe portion 2 b are inserted into arbitrary notches 9 a and 9 a of the connecting pipe 3. The insertion tube portion 3a of the connection tube 3 is inserted into the reception tube portion 2c of the branch tube portion 2b in accordance with the position where the 8b is fitted.

接続管3が分岐管部2bに挿入されると、挿口管部3aに設けられたシールリング12,12が受口管部2cの内周面に圧接されるため、受口管部2cと挿口管部3aとの隙間が密封される。また、接続管3のフランジ9が、分岐管部2bのフランジ8の接続面8aに載置されて水平に重なるとともに、フランジ9の切欠部9a,9aにフランジ8の凸部8b,8bが嵌合する。   When the connection pipe 3 is inserted into the branch pipe part 2b, the seal rings 12 and 12 provided in the insertion pipe part 3a are pressed against the inner peripheral surface of the reception pipe part 2c. A gap with the insertion tube portion 3a is sealed. Further, the flange 9 of the connection pipe 3 is placed on the connection surface 8a of the flange 8 of the branch pipe part 2b and overlaps horizontally, and the notches 9a and 9a of the flange 9 are fitted with the convex parts 8b and 8b of the flange 8. Match.

また、前述のように、凸部8bは、接続管3のフランジ9の厚みと同一の高さ突出しているため、フランジ9の切欠部9a,9aにフランジ8の凸部8b,8bが嵌合時には、凸部8bの端面8cと、フランジ9における接続管3と反対側の面9bとが面一となる。   Further, as described above, since the convex portion 8b protrudes at the same height as the thickness of the flange 9 of the connecting pipe 3, the convex portions 8b and 8b of the flange 8 are fitted in the notches 9a and 9a of the flange 9. Sometimes, the end surface 8c of the convex portion 8b and the surface 9b on the opposite side of the connecting tube 3 in the flange 9 are flush with each other.

また、フランジ8及びフランジ9が上下に重なることにより、分岐管部2bの受口管部2cに対する接続管3の挿口管部3aの過挿入が防止される。更に、フランジ9の切欠部9a,9aにフランジ8の凸部8b,8bが嵌合することにより、分岐管部2b及び接続管3が相対的に位置決めされるとともに、分岐管部2bと接続管3との管軸周りの相対回転が規制される。   Further, since the flange 8 and the flange 9 are vertically overlapped, the insertion tube portion 3a of the connection tube 3 is prevented from being excessively inserted into the receiving tube portion 2c of the branch tube portion 2b. Further, by fitting the convex portions 8b and 8b of the flange 8 to the notches 9a and 9a of the flange 9, the branch pipe portion 2b and the connection pipe 3 are relatively positioned, and the branch pipe portion 2b and the connection pipe are also positioned. 3 relative to the tube axis is restricted.

次いで、図4及び図5に示されるように、上下に重なり合ったフランジ8及びフランジ9に対して分割部材10,10の凹溝10b,10bを外嵌させる。このとき、フランジ8及びフランジ9は、分割部材10,10の凹溝10b,10b内に嵌合され、壁部10a,10aが水平に当接するようになる。すなわち、フランジ8及びフランジ9が壁部10a,10aにより上下から挟まれるようになるため、分岐管部2bと接続管3が上下方向に離間することが防止される。また、このときには、前述のように凸部8bの端面8cと、フランジ9における接続管3と反対側の面9bとが略面一となり、分岐管部2bと接続管3との接続部分であるフランジ部分が平坦となっているため、分割部材10,10をフランジ8及びフランジ9の周方向の自由な位置に取付けることができる。   Next, as shown in FIGS. 4 and 5, the recessed grooves 10 b and 10 b of the divided members 10 and 10 are fitted on the flange 8 and the flange 9 which are vertically overlapped. At this time, the flange 8 and the flange 9 are fitted in the concave grooves 10b and 10b of the divided members 10 and 10, and the wall portions 10a and 10a come into horizontal contact. That is, since the flange 8 and the flange 9 are sandwiched from above and below by the wall portions 10a and 10a, the branch pipe portion 2b and the connection pipe 3 are prevented from being separated in the vertical direction. At this time, as described above, the end surface 8c of the convex portion 8b and the surface 9b on the opposite side of the connecting tube 3 in the flange 9 are substantially flush with each other, and is a connecting portion between the branch tube portion 2b and the connecting tube 3. Since the flange portion is flat, the divided members 10 and 10 can be attached to the flange 8 and the flange 9 at free positions in the circumferential direction.

また前述のように、分割部材10,10は、フランジ8及びフランジ9の外径と同径あるいは大きい内径を有していることから、フランジ8及びフランジ9に取り付け容易であるが、例えば分割部材10,10は、フランジ8及びフランジ9の外径よりも小さい内径を有していてもよく、このようにすることで、分割部材10,10の取付け時には、分割部材10,10が一旦拡径するように弾性変形されるとともに、分割部材10,10の取付け後には、分割部材10,10の弾性復元力が内径方向に働くため、フランジ8及びフランジ9に取付けられた分割部材10,10は、外れ難くなるという効果を奏する。   Further, as described above, since the divided members 10 and 10 have an inner diameter that is the same as or larger than the outer diameter of the flange 8 and the flange 9, it can be easily attached to the flange 8 and the flange 9. 10 and 10 may have an inner diameter smaller than the outer diameter of the flange 8 and the flange 9, and in this way, when the divided members 10 and 10 are attached, the divided members 10 and 10 are once expanded in diameter. Since the elastic restoring force of the divided members 10 and 10 works in the inner diameter direction after the split members 10 and 10 are attached, the split members 10 and 10 attached to the flange 8 and the flange 9 are The effect is that it is difficult to come off.

また、図5に示されるように、分割部材10,10は、フランジ8及びフランジ9に取付けられた状態において、両分割部材10,10の端部同士が周方向に離間するように配置され、その間に間隙16,16が形成される。   Further, as shown in FIG. 5, the divided members 10 and 10 are arranged so that the end portions of both the divided members 10 and 10 are separated from each other in the circumferential direction in a state of being attached to the flange 8 and the flange 9. In the meantime, gaps 16, 16 are formed.

続いて、図6及び図7に示されるように、フランジ8及びフランジ9に外嵌された分割部材10,10に対してリング部材11を取付ける。リング部材11は、リング部材11の凸片15,15を分割部材10,10同士の間隙16,16に挿通させるように下降させることで、リング部13が分割部材10,10を全周に亘り囲繞する位置に配される。リング部材11を下降させる際には、リング部13のテーパ面13aが、分割部材10,10のテーパ面10c,10cに摺動するため、リング部材11の下降とともに分割部材10,10が内径方向に押圧されてフランジ8及びフランジ9に対して離脱不能に固定される。またリング部材11は、凸片15,15が間隙16,16を通過した高さ位置に達すると、リング部13のテーパ面13aと分割部材10,10のテーパ面10c,10cとの摺接により、更にリング部材11が下降しないように規制されている。   Subsequently, as shown in FIG. 6 and FIG. 7, the ring member 11 is attached to the divided members 10, 10 fitted on the flange 8 and the flange 9. The ring member 11 is lowered so that the convex pieces 15 and 15 of the ring member 11 are inserted into the gaps 16 and 16 between the divided members 10 and 10, so that the ring portion 13 extends the divided members 10 and 10 over the entire circumference. Arranged in a position to surround. When the ring member 11 is lowered, the tapered surface 13a of the ring portion 13 slides on the tapered surfaces 10c, 10c of the divided members 10, 10, so that the divided members 10, 10 are moved in the inner diameter direction as the ring member 11 is lowered. Is fixed to the flange 8 and the flange 9 so as not to be detached. Further, when the ring member 11 reaches the height position at which the convex pieces 15, 15 have passed through the gaps 16, 16, sliding contact between the tapered surface 13 a of the ring portion 13 and the tapered surfaces 10 c, 10 c of the divided members 10, 10 occurs. Further, the ring member 11 is restricted so as not to descend.

次に、図8に示されるように、ハンドル部14,14を把持してリング部材11を周方向に所定角度回転させる。これによれば、図9に示されるように、リング部材11の凸片15,15が、分割部材10,10同士の間隙16,16を周方向に避けた位置に配される。すなわち、リング部材11の凸片15,15が、フランジ8及びフランジ9に対して離脱不能に固定された分割部材10,10の下方に配置される。したがって、リング部材11に対して上方に移動させる力が働いても、リング部材11の凸片15,15が分割部材10,10の一方端縁である下端縁10d,10dに係止され、リング部13が分割部材10,10を囲繞した位置から外れることが防止される。そのため、リング部13による分割部材10,10を離脱不能に内径方向に押圧する機能が保たれる。   Next, as shown in FIG. 8, the handle portions 14 and 14 are held and the ring member 11 is rotated in the circumferential direction by a predetermined angle. According to this, as shown in FIG. 9, the convex pieces 15, 15 of the ring member 11 are arranged at positions avoiding the gaps 16, 16 between the divided members 10, 10 in the circumferential direction. That is, the convex pieces 15 and 15 of the ring member 11 are disposed below the split members 10 and 10 fixed to the flange 8 and the flange 9 so as not to be detached. Therefore, even if a force to move upward is applied to the ring member 11, the convex pieces 15 and 15 of the ring member 11 are locked to the lower end edges 10 d and 10 d that are one end edges of the divided members 10 and 10, The part 13 is prevented from coming off the position surrounding the divided members 10 and 10. Therefore, the function of pressing the split members 10 and 10 by the ring portion 13 in the inner diameter direction so as not to be detached is maintained.

その後、図1に示されるように、補修弁装置4の上端に設けられた連結フランジ4aと延長管5の下端の連結フランジ5aとを連結するとともに、延長管5の上端の連結フランジ5a’と消火栓6の連結フランジ6aとを連結する。   Thereafter, as shown in FIG. 1, the connecting flange 4 a provided at the upper end of the repair valve device 4 is connected to the connecting flange 5 a at the lower end of the extension pipe 5, and the connecting flange 5 a ′ at the upper end of the extension pipe 5 The connecting flange 6a of the fire hydrant 6 is connected.

以上説明したように、接続管3が分岐管部2bに挿入された際に、上下に重なり合った分岐管部2bのフランジ8と接続管3のフランジ9とは、分割部材10,10の凹溝10b,10bにより一体に挟まれることにより、分岐管部2bと接続管3とが離脱することが防止される。更に、フランジ8とフランジ9とを離間不能に固定した分割部材10,10は、無端状のリング部13を備えるリング部材11により当該フランジ8及びフランジ9からの脱落が防止されている。すなわち、分岐管部2bと接続管3とを接続するフランジ部分であるフランジ8及びフランジ9は、周方向に所定長さ連続した別体の分割部材10,10により高い強度が確保されている。そのため、分岐管部2bのフランジ8、及び接続管3のフランジ9自体を厚く形成する必要がなく、分岐管部2b及び接続管3の重量を軽減できる。   As described above, when the connection pipe 3 is inserted into the branch pipe part 2b, the flange 8 of the branch pipe part 2b and the flange 9 of the connection pipe 3 that overlap in the vertical direction are the concave grooves of the dividing members 10, 10. By being sandwiched integrally by 10b and 10b, the branch pipe portion 2b and the connecting pipe 3 are prevented from being detached. Further, the split members 10, 10 in which the flange 8 and the flange 9 are fixed so as not to be separated from each other are prevented from falling off from the flange 8 and the flange 9 by the ring member 11 including the endless ring portion 13. That is, the flange 8 and the flange 9 which are flange portions that connect the branch pipe portion 2b and the connection pipe 3 have a high strength secured by separate members 10 and 10 that are continuous for a predetermined length in the circumferential direction. Therefore, it is not necessary to form the flange 8 of the branch pipe part 2b and the flange 9 itself of the connection pipe 3 thick, and the weight of the branch pipe part 2b and the connection pipe 3 can be reduced.

また、接続管3を分岐管部2bに挿入時には、フランジ9の切欠部9a,9aにフランジ8の凸部8b,8bが嵌合して分岐管部2b及び接続管3が相対的に位置決めされる。そのため、分岐管部2b及び接続管3を、それぞれ予め決められた所定角度に向けた適正位置に配置することが容易である。また、接続管3を分岐管部2bに挿入時には、分岐管部2bと接続管3との管軸周りの相対的な回転が規制されるため、その後のフランジ8とフランジ9への分割部材10,10の取付け作業が容易となる。   Further, when the connecting pipe 3 is inserted into the branch pipe portion 2b, the convex portions 8b and 8b of the flange 8 are fitted into the notches 9a and 9a of the flange 9 so that the branch pipe portion 2b and the connecting pipe 3 are relatively positioned. The Therefore, it is easy to arrange the branch pipe portion 2b and the connection pipe 3 at appropriate positions directed to predetermined angles. Further, when the connecting pipe 3 is inserted into the branch pipe portion 2b, the relative rotation around the pipe axis between the branch pipe portion 2b and the connection pipe 3 is restricted, so that the divided member 10 to the flange 8 and the flange 9 thereafter. , 10 can be easily attached.

また、凸部8bの端面8cと、フランジ9における接続管3と反対側の面9bとが面一となり、平坦なフランジ部分を構成できるため、分割部材10,10をフランジ8及びフランジ9の周方向の自由な位置に取付けることができ、かかる分割部材10,10の取付け作業が簡便である。   Further, the end surface 8c of the convex portion 8b and the surface 9b of the flange 9 on the side opposite to the connecting pipe 3 are flush with each other, and a flat flange portion can be formed. It can be attached to any position in the direction, and the attaching operation of the divided members 10, 10 is simple.

また、前述のように分割部材10,10は、フランジ8及びフランジ9に取付けられた状態において、それぞれの両端が周方向に離間して間隙16,16が形成される。そのため、リング部材11に設けられた凸片15,15を、分割部材10,10間の間隙16,16を通過させ、且つ通過後に周方向に所定角度回転させることで分割部材10,10の下端縁10d,10dに係止させることが可能となる。このように、極めて簡単な構造の分割部材10とリング部材11とを用いて互いに係合させることができる。特に、分割部材10には、凸片15が係合する溝等を予め形成する必要がなく、製造にかかるコストを抑えることができる。   Further, as described above, when the divided members 10 and 10 are attached to the flange 8 and the flange 9, both ends thereof are separated from each other in the circumferential direction to form gaps 16 and 16. Therefore, the lower ends of the divided members 10, 10 are obtained by causing the convex pieces 15, 15 provided on the ring member 11 to pass through the gaps 16, 16 between the divided members 10, 10 and to rotate a predetermined angle in the circumferential direction after the passage. It becomes possible to be engaged with the edges 10d and 10d. In this way, the split member 10 and the ring member 11 having an extremely simple structure can be engaged with each other. In particular, the dividing member 10 does not need to be formed in advance with a groove or the like with which the convex piece 15 is engaged, and the manufacturing cost can be reduced.

また、リング部材11を取付ける際には、リング部13のテーパ面13aと、分割部材10,10のテーパ面10c,10cとの摺動によりリング部13の内側に配される分割部材10,10がフランジ8及びフランジ9対して押し付けられるため、地震による揺れ等の外力に対する管接続構造1の強度を高めることができる。   Further, when the ring member 11 is attached, the divided members 10, 10 disposed inside the ring portion 13 by sliding between the tapered surface 13 a of the ring portion 13 and the tapered surfaces 10 c, 10 c of the divided members 10, 10. Is pressed against the flange 8 and the flange 9, it is possible to increase the strength of the pipe connection structure 1 against external forces such as shaking caused by an earthquake.

また、フランジ8とフランジ9は、ボルト・ナットを用いないため、分岐管部2bのフランジ8、接続管3のフランジ9、分割部材10,10、及びリング部材11をダクタイル鋳鉄製に統一することができ、異種金属に起因する各部材の腐食を防止できる。このように、補修弁装置4よりも下方の部材は、腐食が防止されているため、補修弁装置4よりも上方に配置される消火栓6や延長管5に腐食や経年劣化などの不具合が起きた場合には、補修弁装置4の上方に延びる操作部4bを操作して図示しない弁体を移動させることにより、接続管3内の流路を閉塞して消火栓6や延長管5の交換補修を簡便に行うことができる。尚、上述したようにボルト・ナットを用いない本発明の管接続構造を、消火栓6や延長管5等に適用してもよい。   Since the flange 8 and the flange 9 do not use bolts and nuts, the flange 8 of the branch pipe portion 2b, the flange 9 of the connection pipe 3, the divided members 10, 10 and the ring member 11 should be made of ductile cast iron. Thus, corrosion of each member due to different metals can be prevented. As described above, since the member below the repair valve device 4 is prevented from being corroded, the fire hydrant 6 and the extension pipe 5 disposed above the repair valve device 4 have problems such as corrosion and deterioration over time. In such a case, the operation portion 4b extending above the repair valve device 4 is operated to move a valve body (not shown), thereby closing the flow path in the connection pipe 3 to replace and repair the fire hydrant 6 and the extension pipe 5. Can be performed easily. As described above, the pipe connection structure of the present invention that does not use bolts and nuts may be applied to the fire hydrant 6, the extension pipe 5, and the like.

分割部材に対するリング部材の周方向の回転移動を規制する変形例1として次のようなものがある。尚、前記実施例に示される構成部分と同一構成で重複する構成の説明を省略する。   As a first modification for restricting the rotational movement of the ring member in the circumferential direction with respect to the divided member, there is the following. The description of the same configuration as the configuration shown in the above embodiment is omitted.

図10及び図11に示されるように、管接続構造1’は、リング部材11’の周方向の回転が規制されている。詳しくは、分岐管部2bの凸部8b’,8b’は、接続管3のフランジ9の厚み以上の高さ突出するようになっており、これら凸部8b’,8b’が分割部材10’,10同士の間隙16,16に係合し、分割部材10’,10とフランジ8及びフランジ9との相対回転移動が規制される。更に、一方の分割部材10’の所定箇所には、分岐管部2b及び接続管3の径方向に向けて孔部17が形成されているとともに、リング部材11’の所定箇所には、径方向に貫通する貫通孔18が形成されている。この孔部17と貫通孔18とは、前述のようにリング部材11’が周方向に所定角度回転されたときに連通するようになっており、連通した孔部17及び貫通孔18にピン19を挿通することにより、リング部材11’の周方向の回転移動が規制されている。   As shown in FIGS. 10 and 11, the pipe connection structure 1 ′ is restricted from rotating in the circumferential direction of the ring member 11 ′. Specifically, the convex portions 8b ′ and 8b ′ of the branch pipe portion 2b protrude so as to have a height that is equal to or greater than the thickness of the flange 9 of the connecting pipe 3, and these convex portions 8b ′ and 8b ′ are separated from the dividing member 10 ′. , 10 are engaged with the gaps 16 and 16, and the relative rotational movement between the divided members 10 'and 10 and the flange 8 and flange 9 is restricted. Furthermore, a hole 17 is formed in a predetermined location of one split member 10 ′ toward the radial direction of the branch pipe portion 2b and the connecting tube 3, and a radial direction is provided in a predetermined location of the ring member 11 ′. A through hole 18 penetrating therethrough is formed. The hole 17 and the through hole 18 communicate with each other when the ring member 11 ′ is rotated by a predetermined angle in the circumferential direction as described above, and the pin 19 is connected to the communicated hole 17 and the through hole 18. , The rotational movement of the ring member 11 ′ in the circumferential direction is restricted.

このように、分岐管部2bとリング部材11’と分割部材10’,10との相互回転移動が規制されることにより、リング部材11’に設けられた凸片15,15が、分割部材10,10に係止された状態を確実に保つことができる。また、分割部材10’,10とフランジ8及びフランジ9との相対回転移動が規制されることにより、リング部材11’を周方向に所定角度回転させる際に、分割部材10’,10とリング部材11’とが共回りすることが防止できる。また、孔部17及び貫通孔18に挿通されたピン19は、外周面がゴムライニング等の防食加工されているため、ピン19周辺の腐食を防止できる。   As described above, the mutual rotation movement of the branch pipe portion 2b, the ring member 11 ′, and the split members 10 ′ and 10 is restricted, so that the convex pieces 15 and 15 provided on the ring member 11 ′ become the split member 10. , 10 can be reliably maintained. Further, when the relative rotation movement between the divided members 10 ′ and 10 and the flange 8 and the flange 9 is restricted, when the ring member 11 ′ is rotated by a predetermined angle in the circumferential direction, the divided members 10 ′ and 10 and the ring member are rotated. 11 'can be prevented from co-rotating. Moreover, since the outer peripheral surface of the pin 19 inserted through the hole 17 and the through hole 18 is subjected to anticorrosion processing such as rubber lining, corrosion around the pin 19 can be prevented.

尚、分岐管部2bの凸部8b’,8b’は、分割部材10’,10同士の間隙16,16に係合する態様に限らず、フランジ8及びフランジ9の接続時において、接続管3のフランジ9における接続管3と反対側の面9bより突出する凸部8b’,8b’の一部が嵌合可能な凹部を分割部材10,10の凹溝10b,10bにそれぞれ設けることで、分割部材10,10とフランジ8及びフランジ9との相対回転を規制してもよい。   The convex portions 8b ′ and 8b ′ of the branch pipe portion 2b are not limited to the mode of engaging the gaps 16 and 16 between the divided members 10 ′ and 10, but the connecting pipe 3 is connected when the flange 8 and the flange 9 are connected. By providing recesses into which the projections 8b ′ and 8b ′ projecting from the surface 9b opposite to the connection pipe 3 in the flange 9 can be fitted in the recesses 10b and 10b of the divided members 10 and 10, respectively. The relative rotation between the divided members 10 and 10 and the flange 8 and the flange 9 may be restricted.

次に、リング部材の周方向の回転移動を規制する変形例2について説明する。図12に示されるように、管接続構造1’’におけるリング部材11’’は、リング部13’の上面側に切欠き23,23を有している。この切欠き23には、剛性を有する材料から形成される回転防止部材24の一部が嵌合可能となっている。回転防止部材24の径方向の幅は、切欠き23の径方向の幅よりも大きく形成されている。   Next, a second modification for restricting the rotational movement of the ring member in the circumferential direction will be described. As shown in FIG. 12, the ring member 11 ″ in the pipe connection structure 1 ″ has notches 23 and 23 on the upper surface side of the ring portion 13 ′. A part of the rotation preventing member 24 formed of a material having rigidity can be fitted into the notch 23. The radial width of the rotation preventing member 24 is formed larger than the radial width of the notch 23.

図13に示されるように、切欠き23,23は、リング部材11’’が周方向に所定角度回転されたときに間隙16,16と径方向に連通するようになっており、径方向に連通した切欠き23,23及び間隙16,16には、上方から回転防止部材24,24が嵌合される。すなわち、回転防止部材24は、分割部材10,10とリング部材11’’とに渡って係合されるため、分割部材10,10とリング部材11’’との相対回転移動が規制される。このように、間隙16,16を利用して分割部材10,10とリング部材11’’との相対回転移動を規制できるため、分割部材10,10に特段の加工を施す必要がなく、製造コストを抑えることができる。尚、回転防止部材の内周端部を下方に延出させるとともに、当該回転防止部材の内周端部をフランジ9の切欠部9aに係合させるようにしてもよい。この場合、分岐管部2bの凸部8bが、フランジ9における接続管3と反対側の面9bよりも低くすることが好ましい。   As shown in FIG. 13, the notches 23 and 23 communicate with the gaps 16 and 16 in the radial direction when the ring member 11 ″ is rotated by a predetermined angle in the circumferential direction. Anti-rotation members 24 and 24 are fitted into the cutouts 23 and 23 and the gaps 16 and 16 communicated from above. That is, since the rotation preventing member 24 is engaged across the divided members 10 and 10 and the ring member 11 ″, the relative rotational movement between the divided members 10 and 10 and the ring member 11 ″ is restricted. In this way, since the relative rotational movement between the divided members 10 and 10 and the ring member 11 ″ can be restricted using the gaps 16 and 16, it is not necessary to perform special processing on the divided members 10 and 10 and the manufacturing cost is reduced. Can be suppressed. The inner peripheral end of the rotation preventing member may be extended downward, and the inner peripheral end of the rotation preventing member may be engaged with the notch 9 a of the flange 9. In this case, it is preferable that the convex part 8b of the branch pipe part 2b is lower than the surface 9b on the flange 9 opposite to the connection pipe 3.

また、管接続構造1の周辺構造の一例として次の態様を説明する。図14に示されるように、例えば、流体管2’が、地表から地中に向かって形成された人孔20内を延びる大径の分岐管部2b’を有しており、分岐管部2b’に取付けられた接続体21が、受口管部22を有している。また、接続管3’の上部には、水平方向に延びる操作部41bを操作することにより、図示しない弁体が接続管3’内の流路を開閉する開閉弁装置41が一体形成されており、開閉弁装置41の上方には、周知の空気弁61が取付けられている。このように、管接続構造1は、分岐管部2b’及び接続体21の受口管部22から成る流体管路と空気弁61とを接続する継手として用いられてもよく、管接続構造1の周辺構造は、自由に設計することができる。この場合、例えば、マンホール下の地中の人孔20内に各流路構成部材が収容されており、これら部材同士がボルト・ナットで接続されている場合、特に地震の際に、ボルト・ナットの経年劣化や錆の発生により、空気弁等が人孔20内壁に衝突して故障する虞が生じるが、本発明の管接続構造1によれば、このような故障を防止することができる。   Moreover, the following aspect is demonstrated as an example of the periphery structure of the pipe connection structure 1. FIG. As shown in FIG. 14, for example, the fluid pipe 2 ′ has a large-diameter branch pipe portion 2 b ′ that extends through the human hole 20 formed from the ground surface toward the ground, and the branch pipe portion 2 b. The connection body 21 attached to “has a receiving pipe part 22. Further, an opening / closing valve device 41 is integrally formed on the upper portion of the connecting pipe 3 ′ so that a valve body (not shown) opens and closes the flow path in the connecting pipe 3 ′ by operating the operation portion 41b extending in the horizontal direction. A known air valve 61 is attached above the on-off valve device 41. As described above, the pipe connection structure 1 may be used as a joint for connecting the fluid pipe line including the branch pipe part 2b ′ and the receiving pipe part 22 of the connection body 21 and the air valve 61. The peripheral structure of can be freely designed. In this case, for example, when each flow path component is accommodated in the human hole 20 in the ground below the manhole and these members are connected to each other by bolts and nuts, especially in the event of an earthquake, the bolts and nuts There is a possibility that the air valve or the like collides with the inner wall of the human hole 20 due to the aging deterioration or the generation of rust, but the pipe connection structure 1 of the present invention can prevent such a failure.

以上、本発明の実施例を図面により説明してきたが、具体的な構成はこれら実施例に限られるものではなく、本発明の要旨を逸脱しない範囲における変更や追加があっても本発明に含まれる。   Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

例えば、前記実施例では、分岐管部2bのフランジ8は、凸部8b,8bが形成されており、接続管3のフランジ9には、切欠部9a,9a,…が形成され、フランジ9の切欠部9a,9aにフランジ8の凸部8b,8bを嵌合させるようになっていたが、これに限られず、分岐管部のフランジに切欠部を設け、接続管のフランジに凸部を形成してもよい。また、切欠部は、有底の凹部であってもよいし、貫通した孔部であってもよく、凸部と相互に係合可能な形状であれば構わない。尚、分割部材により分岐管部及び接続管が相対回転不能に固定される場合には、必ずしも両フランジに凹部及び凸部を設けなくても構わない。   For example, in the above embodiment, the flange 8 of the branch pipe portion 2b is formed with convex portions 8b, 8b, and the flange 9 of the connection tube 3 is formed with notches 9a, 9a,. The protrusions 8b and 8b of the flange 8 were fitted to the notches 9a and 9a. However, the present invention is not limited to this, and a notch is provided in the flange of the branch pipe and a protrusion is formed in the flange of the connection pipe. May be. Further, the notched portion may be a bottomed concave portion or a through-hole portion, and may have any shape as long as it can engage with the convex portion. In addition, when a branch pipe part and a connection pipe are fixed by a division member so that relative rotation is impossible, a recessed part and a convex part do not necessarily need to be provided in both flanges.

また、管接続構造は、例えば地中に水平方向に埋設される管路の継手として利用されてもよい。特に、この管接続構造は、前述のようにフランジ部分が両フランジに加えて、周方向に所定長さ連続した別体の分割部材により高い強度が確保されているため、耐震用管路等に対しても流用可能となっている。   Further, the pipe connection structure may be used as, for example, a joint of a pipe line buried in the ground in the horizontal direction. In particular, this pipe connection structure, as described above, has a flange portion in addition to both flanges, and since a high strength is ensured by a separate divided member that is continuous for a predetermined length in the circumferential direction, it can be used for seismic resistance pipes, etc. It can also be diverted.

また、リング部材11は、ハンドル部14,14が凸片15,15を有する構成で説明したが、これに限らず、凸片15,15はリング部13に直接設けられてもよい。更に、リング部材11の回転に必ずしもハンドル部14,14を用いる必要はなく、別途工具などを利用することで、ハンドル部14,14を省略してもよい。   Further, the ring member 11 has been described with the configuration in which the handle portions 14 and 14 have the convex pieces 15 and 15, but the present invention is not limited thereto, and the convex pieces 15 and 15 may be provided directly on the ring portion 13. Furthermore, it is not always necessary to use the handle portions 14 and 14 for the rotation of the ring member 11, and the handle portions 14 and 14 may be omitted by using a separate tool or the like.

また、リング部材11のテーパ面13aと、分割部材10,10のテーパ面10c,10cとの摺接により分割部材10,10がフランジ8及びフランジ9対して押し付けられる態様について説明したが、必ずしもこれに限られず、例えば、ベルト状のリング部材を用い、リング部材を分割部材に囲繞させた後、漸次縮径させることにより分割部材を両フランジに押し付ける等の態様であってもよい。また上記したテーパ面に替えて、例えば、リング部材の上端に突出部を形成し、当該突出部を分割部材に係合させることで、リング部材を分割部材に組み付けるようにしてもよい。   Further, although the description has been given of the aspect in which the divided members 10 and 10 are pressed against the flange 8 and the flange 9 by the sliding contact between the tapered surface 13a of the ring member 11 and the tapered surfaces 10c and 10c of the divided members 10 and 10, For example, a belt-shaped ring member may be used, and after the ring member is surrounded by the split member, the split member may be pressed against both flanges by gradually reducing the diameter. Further, instead of the above-described tapered surface, for example, a protrusion may be formed at the upper end of the ring member, and the protrusion may be engaged with the split member so that the ring member is assembled to the split member.

1,1’ 管接続構造
2,2’ 流体管
2b,2b’ 分岐管部(一方の流路構成部材)
2c 受口管部
3,3’ 接続管(他方の流路構成部材)
3a 挿口管部
8 フランジ
8a 接続面
8b 凸部
8c 凸部端面
9 フランジ
9a 切欠部
9b 接続管と反対側の面
10,10’ 分割部材
10a 壁部
10b 凹溝
10c テーパ面
10d 下端縁(一方端縁)
11,11’ リング部材
12 シールリング(密封部材)
13 リング部
13a テーパ面
15 凸片
16 間隙
1, 1 'pipe connection structure 2, 2' fluid pipe 2b, 2b 'branch pipe part (one flow path component)
2c Receptacle tube portion 3, 3 'connecting tube (other flow path component)
3a Insertion tube portion 8 Flange 8a Connection surface 8b Convex portion 8c Convex end surface 9 Flange 9a Notch portion 9b Surface 10, 10 'opposite to the connection tube Split member 10a Wall portion 10b Concave groove 10c Tapered surface 10d Lower end edge (one side) Edge)
11, 11 'Ring member 12 Seal ring (sealing member)
13 Ring part 13a Taper surface 15 Convex piece 16 Gap

Claims (5)

一方の流路構成部材の受口管部に他方の流路構成部材の挿口管部を挿入し、リング状の密封部材を介して接続する管接続構造であって、
前記受口管部に形成されたフランジと前記挿口管部に形成されたフランジとは、これら両フランジを一体に挟むことができる凹溝を有する複数の分割部材と、前記複数の分割部材の外周面を囲繞する無端状のリング部材と、により接続されており、前記リング部材は、前記複数の分割部材における前記流路構成部材の管軸方向の一方端に係止されることを特徴とする管接続構造。
Inserting the insertion tube portion of the other flow path component member into the receiving tube portion of one flow channel component member, and a pipe connection structure for connecting via a ring-shaped sealing member,
The flange formed in the receiving tube portion and the flange formed in the insertion tube portion include a plurality of divided members having concave grooves capable of sandwiching both the flanges, and the plurality of divided members. And an endless ring member surrounding an outer peripheral surface, and the ring member is locked to one end in the tube axis direction of the flow path component member of the plurality of divided members. Pipe connection structure.
前記両フランジは、相互に係合可能な凹部及び/または凸部を有することを特徴とする請求項1に記載の管接続構造。   The pipe connection structure according to claim 1, wherein the both flanges have a recess and / or a protrusion that can be engaged with each other. 一方の前記フランジの接続面には管軸方向に他方の前記フランジに向けて突出する凸部が形成され、他方の前記フランジには前記凸部が嵌合する切欠部が形成されていることを特徴とする請求項2に記載の管接続構造。   The connecting surface of one of the flanges is formed with a convex portion protruding toward the other flange in the tube axis direction, and the other flange is formed with a notch for fitting the convex portion. 3. The pipe connection structure according to claim 2, wherein 前記複数の分割部材は、少なくとも2つの前記分割部材同士が離間するように前記両フランジに取付けられるようになっており、前記リング部材には、前記複数の分割部材における前記流路構成部材の管軸方向の一方端縁に係止される凸片が内径側に突出して形成され、該凸片は、前記分割部材同士の間を通過可能であることを特徴とする請求項1ないし3のいずれかに記載の管接続構造。   The plurality of divided members are attached to the flanges so that at least two of the divided members are separated from each other, and the ring member includes a pipe of the flow path constituting member in the plurality of divided members. 4. A projecting piece, which is locked to one end edge in the axial direction, is formed to protrude toward the inner diameter side, and the projecting piece can pass between the divided members. The pipe connection structure according to the above. 前記複数の分割部材は、外周面にそれぞれ一方方向に窄まるテーパが設けられており、前記リング部材の内周面には前記分割部材のテーパに面当接するテーパが設けられていることを特徴とする請求項1ないし4のいずれかに記載の管接続構造。   Each of the plurality of divided members is provided with a taper that is narrowed in one direction on the outer peripheral surface, and a taper that is in surface contact with the taper of the divided member is provided on the inner peripheral surface of the ring member. The pipe connection structure according to any one of claims 1 to 4.
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