JP2010203580A - Pipe joint structure - Google Patents

Pipe joint structure Download PDF

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JP2010203580A
JP2010203580A JP2009052201A JP2009052201A JP2010203580A JP 2010203580 A JP2010203580 A JP 2010203580A JP 2009052201 A JP2009052201 A JP 2009052201A JP 2009052201 A JP2009052201 A JP 2009052201A JP 2010203580 A JP2010203580 A JP 2010203580A
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push ring
port
receiving port
ring
pipe
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Koji Fujita
弘司 藤田
Yoshinori Yoshida
義徳 吉田
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Kurimoto Ltd
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Kurimoto Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint structure having strength competing with non-average force due to inside hydraulic pressure without requiring large labor and time. <P>SOLUTION: In the pipe joint structure, a plug 1 is inserted into a socket 2, a rubber ring 12 is interposed in an annular space between the inner peripheral surface of the socket 2 and the outer peripheral surface of the plug 1, an annular push ring 11 is attached to the outer periphery of the plug 1, and the rubber ring 12 is pushed and fixed with the push ring 11 into the annular space. A projection 21 directing radially inward is provided in the inner periphery of the push ring 11, a recess 22 is provided in the outer periphery of the plug 1, and the projection 21 is inserted into the recess 22, so that the plug 1 is prevented from coming out of the socket 2. The push ring 11 is formed annularly by connecting a plurality of arc-shaped members 15, 15 in the circumferential direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は、水道、ガス、下水道等に用いる流体輸送用配管の管継手構造に関するものである。   The present invention relates to a pipe joint structure of a fluid transportation pipe used for water supply, gas, sewerage and the like.

水道、ガス、下水道等の各種流体輸送用配管において、その配管を構成する管体は、一方の管端部に、内径がやや拡径された受口を形成し、他方の管端部には、その受口に差込み可能な挿し口を形成したものが用いられる。その管体同士の継手部は、管体の受口内へ隣り合う他の管体の挿し口を挿入し、その受口の内周面と挿し口の外周面との間の環状の隙間へ、ゴム輪等を介在させることにより、水密性が維持されている。   In pipes for transporting various fluids such as water, gas, and sewerage, the pipes constituting the pipes form a receiving port with a slightly enlarged inner diameter at one pipe end and the other pipe end. In this case, an insertion port that can be inserted into the receiving port is formed. The joint part between the tubes inserts the insertion port of the other tube adjacent to the tube receiving port, into the annular gap between the inner peripheral surface of the receiving port and the outer peripheral surface of the insertion port, Watertightness is maintained by interposing a rubber ring or the like.

例えば、図10、図11に示す水道管用ダクタイル管の継手部9では、受口2の内周面と挿し口1の外周面との間の環状の隙間に、ゴム輪(止水リング)12を挿入し、そのゴム輪12を押し輪11で押し込むことによって、受口2と挿し口1とが水密に接続されている。
この構成によって、継手部9を構成する管体p,p同士の管軸方向へのある程度の伸縮機能と、その管体p,p同士の離脱防止機能とを発揮している(例えば、特許文献1参照)。
For example, in the joint portion 9 of the duct pipe for water pipe shown in FIGS. 10 and 11, a rubber ring (water-stop ring) 12 is provided in an annular gap between the inner peripheral surface of the receiving port 2 and the outer peripheral surface of the insertion port 1. And the rubber ring 12 is pushed in by the push ring 11, so that the receiving port 2 and the insertion port 1 are connected in a watertight manner.
With this configuration, a certain degree of expansion and contraction function in the tube axis direction between the pipe bodies p and p constituting the joint portion 9 and a function of preventing the separation between the pipe bodies p and p are exhibited (for example, Patent Documents). 1).

なお、管体p,p同士の離脱防止機能を高めるため、前記ゴム輪12に加えて、硬質の抜け止めリングを挿し口1の外面に宛がうようにしたものもある(例えば、特許文献2,3,4参照)。   In addition to the rubber ring 12, there is a structure in which a hard retaining ring is inserted into the outer surface of the mouth 1 in order to enhance the function of preventing separation between the pipes p, p (for example, Patent Document 1). 2, 3, 4).

ところで、建物や道路が交錯する市街地等の配管では、図9に符号pで示すような直線状の管体、いわゆる直管(以下、管体p又は直管pと称する)だけでは管路を形成することができない。このため、地形や道路の形態に合わせて、例えば、図9に符号p’で示すような曲がり管や、あるいは分岐部を有するT字管、Y字管等のいわゆる異形管が使用される場合が多い。   By the way, in a piping in an urban area where buildings and roads cross each other, a straight pipe body as indicated by a symbol p in FIG. 9, that is, a so-called straight pipe (hereinafter referred to as a tubular body p or a straight pipe p) is used to form a pipeline. Cannot be formed. For this reason, according to the topography and the form of the road, for example, a bent pipe as indicated by reference numeral p ′ in FIG. 9 or a so-called deformed pipe such as a T-shaped pipe or a Y-shaped pipe having a branching portion is used. There are many.

これらの異形管(以下、管体p’又は異形管p’と称する)には、内部の流体圧によって、例えば、図中の矢印Aで示すように、継手部9を脱管させる方向への外力(不平均力)が作用する傾向がある。   These deformed pipes (hereinafter referred to as tube p 'or deformed pipe p') are moved in the direction in which the joint portion 9 is removed by the internal fluid pressure, for example, as indicated by arrow A in the figure. There is a tendency for external force (non-average force) to act.

この不平均力による継手部9の脱管を防止するため、その継手部9の周囲にコンクリート防護を行う場合がある。このコンクリート防護は、例えば、図9に示すように、異形管p’の外周とその前後の直管pとの継手部9の外周を囲むように、コンクリートブロック8を打設して行っている。   In order to prevent the pipe portion 9 from being piped off due to this non-average force, concrete protection may be provided around the joint portion 9. For example, as shown in FIG. 9, the concrete protection is performed by placing a concrete block 8 so as to surround the outer periphery of the joint portion 9 between the outer periphery of the deformed pipe p ′ and the straight pipe p before and after the deformed pipe p ′. .

これは、コンクリートブロック8及び管体p,p’等の自重によって周囲の地盤との間に生じる摩擦力と、そのコンクリートブロック8の背面に生じる周囲の地盤からの受働土圧とによって、不平均力に対抗するものである。なお、図中の矢印Bは受働土圧を、矢印Cはその摩擦力を示している。   This is due to the frictional force generated between the concrete block 8 and the pipes p, p ′, etc. due to its own weight, and the passive earth pressure generated from the surrounding ground on the back of the concrete block 8. It is against power. In addition, the arrow B in a figure has shown the passive earth pressure, and the arrow C has shown the frictional force.

特開2003−278967号公報JP 2003-278967 A 実開昭51−54820号公報Japanese Utility Model Publication No. 51-54820 実開昭52−41017号公報Japanese Utility Model Publication No. 52-41017 実開昭56−37779号公報Japanese Utility Model Publication No. 56-37779

このコンクリート防護を行うためには、型枠の設置やコンクリートの混練及び打設の工程が必要である。また、コンクリートが硬化して所定の強度を発現するまでには、相当の養生期間を必要とする。
このため、継手部の接合後、実際に通水を開始できるようになるまで、多大な手間と時間を要するという問題がある。コンクリート防護に手間と時間を要することは、コスト高の原因ともなっており、また、工期に及ぼす影響も大きいことから改善が望まれている。
In order to perform this concrete protection, it is necessary to install a formwork and knead and cast concrete. In addition, a considerable curing period is required until the concrete hardens and exhibits a predetermined strength.
For this reason, after joining of a joint part, there exists a problem that much time and effort are required until it becomes possible to actually start water flow. The time and effort required to protect concrete is a cause of high costs, and also has a great influence on the construction period, so improvement is desired.

そこで、この発明は、多大な手間と時間を要することなく、内部の流体圧による不平均力に対抗できる強度を有する管継手構造とすることを課題とする。   Accordingly, an object of the present invention is to provide a pipe joint structure having a strength capable of resisting the non-average force due to the internal fluid pressure without requiring much labor and time.

上記の課題を解決するために、この発明は、受口内に挿し口を挿入し、その受口の内周面と挿し口の外周面との間の環状空間にゴム輪を介在させ、前記挿し口の外周に押し輪を取り付けて、その押し輪で前記ゴム輪を前記環状空間内に押し込んで固定した管継手構造において、前記押し輪の内周に内径方向に向く凸部を設け、前記挿し口の外周に凹部を設け、その凸部が前記凹部に入り込むことにより、前記受口からの前記挿し口の抜け出しを防止していることを特徴とする管継手構造とした。   In order to solve the above problems, the present invention inserts an insertion port into a receiving port, interposes a rubber ring in an annular space between the inner peripheral surface of the receiving port and the outer peripheral surface of the insertion port, and inserts the insertion port. In a pipe joint structure in which a push ring is attached to the outer periphery of the mouth, and the rubber ring is pushed into the annular space with the push ring and fixed, a convex portion facing the inner diameter direction is provided on the inner circumference of the push ring, and the insertion The pipe joint structure is characterized in that a concave portion is provided on the outer periphery of the mouth, and the convex portion enters the concave portion to prevent the insertion port from coming out of the receiving port.

凸部が凹部に入り込むことで受口からの挿し口の抜け出しを防止し、管体に生じる前記不平均力に対抗できることから、従来行っていたコンクリート防護の規模を縮小し、あるいは、コンクリート防護自体を省略することができる。このため、管継手構造を構築するための手間と時間の縮小に寄与し得る。   Since the convex portion enters the concave portion, it is possible to prevent the insertion port from coming out of the receiving port and counter the above-mentioned non-average force generated in the pipe body, so that the scale of the conventional concrete protection can be reduced, or the concrete protection itself Can be omitted. For this reason, it can contribute to reduction of the effort and time for constructing a pipe joint structure.

この管継手構造は、直管同士の継手部においても所定の効果を発揮できるが、不平均力が比較的大きい、曲がり管や、あるいは分岐部を有するT字管、Y字管等のいわゆる異形管が関わる継手部においては、特に、その効果が顕著である。
すなわち、異形管と異形管との継手部や、異形管と直管との継手部において採用すると、その効果が顕著である。言い換えれば、継手部の受口と挿し口のうち、少なくとも一方が異形管の管端部に設けられたものである場合である。
This pipe joint structure can exhibit a predetermined effect even in a joint part between straight pipes, but has a relatively large non-average force, a so-called irregular shape such as a bent pipe or a T-shaped pipe having a branch part, a Y-shaped pipe, etc. The effect is particularly remarkable in a joint portion involving a pipe.
That is, the effect is remarkable when it is adopted in a joint portion between a deformed tube and a deformed tube or a joint portion between a deformed tube and a straight tube. In other words, at least one of the receiving port and the insertion port of the joint portion is provided at the tube end portion of the deformed tube.

これらの各構成において、前記押し輪は、複数の円弧状部材が周方向に沿って連結されることにより環状に形成されている構成とすることができる。   In each of these configurations, the push wheel may be formed in an annular shape by connecting a plurality of arcuate members along the circumferential direction.

押し輪が周方向に分割されていることによって、押し輪の取り付けの際に、その押し輪の凸部が挿し口の外面に食い込んで傷つけたり、あるいは、防食のために施された外面塗装を損傷させたりする事態を防ぐことができる。
これは、押し輪が環状に一体に成型されていると、その取り付けに際し、挿し口の外周に環状の押し輪を嵌めて、管軸方向に位置合わせする動作が発生するのに対し、押し輪が分割されていると、その分割された各部材を、それぞれ挿し口の外面に管径方向外側から宛がう動作で足りるからである。
Due to the fact that the press ring is divided in the circumferential direction, when the press ring is installed, the convex part of the press ring may bite into the outer surface of the insertion slot and damage it, or the outer coating applied for corrosion protection may be applied. This can prevent damage.
This is because when the push ring is integrally molded in an annular shape, an operation of fitting the annular push ring to the outer periphery of the insertion opening and aligning it in the tube axis direction occurs when attaching the push ring. This is because it is sufficient to move the divided members to the outer surface of the insertion opening from the outside in the pipe radial direction.

このように、押し輪を複数の円弧状部材で構成した場合において、その円弧状部材同士の連結は、前記各円弧状部材の端部に設けた連結部を重ね、その連結部同士を連結ボルトで接合して行われる構成とすることができる。   In this way, when the push ring is constituted by a plurality of arc-shaped members, the arc-shaped members are connected to each other by overlapping the connecting portions provided at the ends of the arc-shaped members, and connecting the connecting portions to each other. It can be set as the structure performed by joining by.

このとき、連結部同士は、管軸方向に重ねてもよいし、挿し口の外周に沿って周方向に重ねてもよい。連結部同士を管軸方向に重ねる場合は、連結ボルトはその軸心が管軸方向へ向き、連結部同士を周方向に重ねる場合は、連結ボルトはその軸心が挿し口周りの周方向へ向くこととなる。   At this time, the connecting portions may be overlapped in the tube axis direction, or may be overlapped in the circumferential direction along the outer periphery of the insertion opening. When the connecting parts are overlapped in the tube axis direction, the axis of the connecting bolt is oriented in the tube axis direction. When the connecting parts are overlapped in the circumferential direction, the axis of the connecting bolt is inserted in the circumferential direction around the opening. It will turn.

また、押し輪を用いた一般的な継手部の構成として、次のようなものがある。
すなわち、押し輪は、管軸方向に伸びる筒状の本体部と、その本体部から管径方向外側に立ち上がるフランジ部とを備え、前記本体部の前端が、前記ゴム輪の後端部に当接している構成である。その押し輪のフランジ部に、管軸方向に伸びる貫通孔とねじ孔とを設け、前記受口の端部には、管径方向外側に立ち上がるフランジ部が設けられており、前記受口のフランジ部にねじ孔が設けられている。
Moreover, there exists the following as a structure of the common coupling part using a push ring.
That is, the push ring includes a cylindrical main body portion extending in the tube axis direction, and a flange portion that rises outward from the main body portion in the tube radial direction, and the front end of the main body portion contacts the rear end portion of the rubber ring. It is the structure which touches. A through hole and a screw hole extending in the tube axis direction are provided in the flange portion of the push ring, and a flange portion that rises outward in the tube diameter direction is provided at the end of the receiving port. The part is provided with a screw hole.

このように、受口と押し輪にそれぞれフランジ部を備えた構成において、前記押し輪の貫通孔と前記受口のねじ孔とに挿通された接合ボルトにナットをねじ込むことで、前記ゴム輪が前記環状空間内に押し込まれるようになっており、さらに、前記押し輪のねじ孔にねじ込まれた屈曲防止ボルトの前端が、前記受口のフランジ部の端面に当接している構成を採用することができる。   As described above, in the configuration in which the receiving port and the push ring are respectively provided with the flange portions, the rubber ring is formed by screwing the nut into the joining bolt inserted through the through hole of the push ring and the screw hole of the receiving port. Further, a configuration is adopted in which the front end of the anti-bending bolt screwed into the screw hole of the push ring is in contact with the end surface of the flange portion of the receiving port. Can do.

屈曲防止ボルトの前端が、前記受口のフランジ部の端面に当たることで、受口からの挿し口の抜け出しをさらに確実に防止することができる。   Since the front end of the bending prevention bolt hits the end surface of the flange portion of the receiving port, it is possible to more reliably prevent the insertion port from coming out of the receiving port.

この発明は、凸部が凹部に入り込むことで受口からの挿し口の抜け出しを防止できることから、多大な手間と時間を要することなく、内部の流体圧による不平均力に対抗できる強度を有する管継手構造とすることができる。   Since this invention can prevent the insertion port from coming out of the receiving port when the projecting portion enters the recessed portion, the tube has a strength capable of resisting the average force caused by the internal fluid pressure without requiring much labor and time. It can be a joint structure.

第一の実施形態を示し、(a)は側面図、(b)は(a)の断面図、(c)は押し輪の側面図The first embodiment is shown, (a) is a side view, (b) is a sectional view of (a), and (c) is a side view of a push ring. (a)(b)は、第一の実施形態の押し輪の斜視図(A) (b) is a perspective view of the push ring of the first embodiment. (a)〜(e)は、管継手構造を構築する際の手順を示す説明図(A)-(e) is explanatory drawing which shows the procedure at the time of constructing a pipe joint structure 異形管の敷設状態を示す平面図Plan view showing the laying state of deformed pipe 第二の実施形態を示し、(a)は側面図、(b)は(a)の断面図2nd embodiment is shown, (a) is a side view, (b) is sectional drawing of (a). (a)(b)は、第二の実施形態の押し輪の詳細図(A) (b) is a detailed view of the push ring of the second embodiment 第三の実施形態を示し、(a)は側面図、(b)(c)は(a)の断面図A third embodiment is shown, (a) is a side view, (b) and (c) are cross-sectional views of (a). 第三の実施形態の押し輪の側面図Side view of the push ring of the third embodiment 従来の異形管の敷設状態を示す平面図Plan view showing the laying state of a conventional deformed pipe 従来例の管継手構造を示す断面図Sectional view showing a conventional pipe joint structure 従来例の管継手構造を示す断面図Sectional view showing a conventional pipe joint structure

この発明の実施形態の管継手構造を、図面に基づいて説明する。ここでは、図4に示すように、水道管用ダクタイル管の45度の曲がり管(異形管)p’と、その前後の直管pとの継手部10を想定している。ただし、この管継手構造を適用できる継手部10は、このような曲がり管p’の継手部10には限定されず、他の形態からなる異形管p’の継手部10にも採用できる。また、直管p同士の継手部にももちろん採用できる。   A pipe joint structure according to an embodiment of the present invention will be described with reference to the drawings. Here, as shown in FIG. 4, a joint portion 10 of a 45-degree bent pipe (deformed pipe) p ′ of a water duct ductile pipe and a straight pipe p before and after the pipe is assumed. However, the joint part 10 to which this pipe joint structure can be applied is not limited to the joint part 10 of such a bent pipe p ', but can be adopted also for the joint part 10 of the deformed pipe p' having other forms. Of course, it can also be adopted for a joint portion between straight pipes p.

(第一の実施形態)
第一の実施形態の継手部10の構成は、図1に示すように、受口2の内周面と挿し口1の外周面との間の環状の隙間に、ゴムなどの弾性体で一体に形成された環状のゴム輪12が介在している。
(First embodiment)
As shown in FIG. 1, the joint portion 10 of the first embodiment is integrated with an elastic body such as rubber in an annular gap between the inner peripheral surface of the receiving port 2 and the outer peripheral surface of the insertion port 1. An annular rubber ring 12 formed between the two is interposed.

ゴム輪12の内周面は円筒面であり、挿し口1の外周面の円筒面に密着している。また、ゴム輪12の外周面は、図1の左側に示す後端部12b側から、右側に示す前端部12c側に向かうにつれて(受口2側に近づくにつれて)徐々に縮径する傾斜面12aとなっている。なお、この管継手構造は、「K形継手」と呼ばれる。図中の符号cは、この継手部10近傍における管軸中心を示している。   The inner peripheral surface of the rubber ring 12 is a cylindrical surface and is in close contact with the cylindrical surface of the outer peripheral surface of the insertion slot 1. Further, the outer peripheral surface of the rubber ring 12 is an inclined surface 12a that gradually decreases in diameter from the rear end portion 12b side shown on the left side in FIG. 1 toward the front end portion 12c side shown on the right side (as it approaches the receiving port 2 side). It has become. This pipe joint structure is called a “K-type joint”. The symbol c in the figure indicates the tube axis center in the vicinity of the joint 10.

また、ゴム輪12の後端部12b側に隣接して、挿し口1の外周には、環状の押し輪11が取り付けてられている。この押し輪11は、管軸方向に伸びる筒状の本体部11aと、その本体部11aの中ほどから管径方向外側に立ち上がるフランジ部11bとを備える。その本体部11aの前端11cは、前記ゴム輪12の後端部12bに当接している。   An annular push ring 11 is attached to the outer periphery of the insertion slot 1 adjacent to the rear end 12 b side of the rubber ring 12. The push ring 11 includes a cylindrical main body portion 11a extending in the tube axis direction, and a flange portion 11b rising from the middle of the main body portion 11a to the outside in the tube radial direction. The front end 11c of the main body 11a is in contact with the rear end 12b of the rubber ring 12.

その押し輪11のフランジ部11bには、管軸方向に伸びる貫通孔11dが形成されている。また、受口2の端部には、管径方向外側に立ち上がるフランジ部4が設けられており、そのフランジ部4には、ねじ孔5が形成されている。押し輪11の貫通孔11dと受口2のねじ孔5とは同数であり、管軸周り同一方位に設けられて対応する貫通孔11dとねじ孔5とが管軸方向に対向している。   A through hole 11 d extending in the tube axis direction is formed in the flange portion 11 b of the push ring 11. In addition, a flange portion 4 that rises outward in the pipe radial direction is provided at the end of the receiving port 2, and a screw hole 5 is formed in the flange portion 4. The number of through holes 11d of the push ring 11 and the number of screw holes 5 of the receiving port 2 are the same, and the corresponding through holes 11d and screw holes 5 are provided in the same direction around the tube axis and face the tube axis direction.

この貫通孔11dとねじ孔5とに、図1に示すように接合ボルト13が挿通される。接合ボルト13にはナット14がねじ込まれて、そのナット14により、フランジ部11b,4間が近寄る方向に締付けられる。この締付けにより、押し輪11の本体部11aの前端11cが、ゴム輪12の後端部12bを押して、そのゴム輪12が前記環状の隙間に押し込まれる。   As shown in FIG. 1, the joining bolt 13 is inserted into the through hole 11 d and the screw hole 5. A nut 14 is screwed into the joining bolt 13, and the nut 14 is tightened in a direction in which the flange portions 11 b and 4 approach each other. By this tightening, the front end 11c of the main body 11a of the push ring 11 pushes the rear end 12b of the rubber ring 12, and the rubber ring 12 is pushed into the annular gap.

このとき、受口2の内面には、図1(b)に示すように、その奥部に向かうにつれて徐々に内径側に近づく傾斜面2aが形成されている。また、ゴム輪12の傾斜面12aは、その受口2の傾斜面2aに摺接している。
このため、ゴム輪12が押し輪11によって受口2の奥部へ押し込まれることによって、そのゴム輪12は、前記傾斜面2a,12a間の摺動とともに、全周に亘って徐々に受口2の内面と挿し口1の外面との密着度合いを増して、最終的に受口2と挿し口1とが水密に接続される。
At this time, as shown in FIG. 1 (b), an inclined surface 2 a that gradually approaches the inner diameter side is formed on the inner surface of the receiving port 2 as it goes toward the inner part. Further, the inclined surface 12 a of the rubber ring 12 is in sliding contact with the inclined surface 2 a of the receiving port 2.
For this reason, when the rubber wheel 12 is pushed into the inner part of the receiving port 2 by the pusher wheel 11, the rubber wheel 12 is gradually moved over the entire circumference along with the sliding between the inclined surfaces 2a and 12a. The degree of close contact between the inner surface of 2 and the outer surface of the insertion port 1 is increased, and the receiving port 2 and the insertion port 1 are finally connected in a watertight manner.

なお、そのナット14による締付けは、ゴム輪12の前端部12cが、受口2の前記傾斜面2aの奥部に設けられた段部2bに当接したところで、ゴム輪12と受口2の内面及び挿し口1の外面とが所定の密着度合いとなって、終了するように設定されている。   The tightening with the nut 14 is performed when the front end 12c of the rubber ring 12 abuts on the step 2b provided in the back of the inclined surface 2a of the receiving port 2 so that the rubber ring 12 and the receiving port 2 are connected. The inner surface and the outer surface of the insertion slot 1 are set to have a predetermined degree of close contact, and are set to end.

また、この継手部10には、押し輪11と挿し口1との管軸方向への相対移動を規制するロック機構20が備えられている。ロック機構20の構成は、図1(b)及び図2(a)(b)に示すように、前記押し輪11の内周には、内径方向に向かって突出する凸部21が設けられている。この実施形態では、凸部21は、管軸周りの全周に亘って、等しい幅及び等しい突出高さで連続的に形成された突条となっている。また、この実施形態では、その突条の中心線方向は、その継手部10を構成する前記受口2及び前記挿し口1における管軸方向に対して直交する面内に配置されている。   In addition, the joint portion 10 is provided with a lock mechanism 20 that restricts relative movement of the push ring 11 and the insertion port 1 in the tube axis direction. As shown in FIGS. 1B and 2A and 2B, the lock mechanism 20 has a convex portion 21 that protrudes toward the inner diameter direction on the inner periphery of the push ring 11. Yes. In this embodiment, the convex portion 21 is a ridge formed continuously with the same width and the same protruding height over the entire circumference around the tube axis. Moreover, in this embodiment, the center line direction of the protrusion is disposed in a plane orthogonal to the tube axis direction of the receiving port 2 and the insertion port 1 constituting the joint portion 10.

また、前記挿し口1の外周には、凹部22が設けられている。凹部22は、管軸周りの全周に亘って、等しい幅及び等しい深さで連続的に形成された溝となっている。また、この実施形態では、その溝の中心線方向は、その継手部10を構成する前記受口2及び前記挿し口1における管軸方向に対して直交する面内に配置されている。   A recess 22 is provided on the outer periphery of the insertion slot 1. The recess 22 is a groove formed continuously with the same width and the same depth over the entire circumference around the tube axis. Moreover, in this embodiment, the center line direction of the groove | channel is arrange | positioned in the surface orthogonal to the pipe-axis direction in the said receiving port 2 and the said insertion port 1 which comprises the joint part 10. As shown in FIG.

なお、凹部22の幅及び深さは、凸部21がしっくりと入り込むことができるものとなっている。凹部22内に凸部21が入り込んだ後は、挿し口1の外周面と押し輪11の内周面とが面接触し、さらに、その凹部22と凸部21とが噛み合うことで、挿し口1と押し輪11とががたつかないようになっている。
ただし、凹部22内に凸部21がスムーズに入り込むことができるよう、両者の間に幅方向に対して多少の隙間が介在することはさしつかえない。
The width and depth of the concave portion 22 are such that the convex portion 21 can enter smoothly. After the convex portion 21 enters the concave portion 22, the outer peripheral surface of the insertion port 1 and the inner peripheral surface of the push ring 11 are in surface contact, and the concave portion 22 and the convex portion 21 mesh with each other. 1 and the push ring 11 do not rattle.
However, a slight gap may be interposed between the two in the width direction so that the convex portion 21 can smoothly enter the concave portion 22.

このように、押し輪11の内周の凸部21が、挿し口1の外周の凹部22に入り込むことにより、前記受口から前記挿し口が抜け出そうとする力(図1(b)の矢印a,b、矢印c,d参照)に対し、その凸部21と凹部22とが噛み合うことでその抜け出し力に対抗している。すなわち、凸部21が凹部22に入り込むことで受口2からの挿し口1の抜け出しを防止し、管体p,p’に生じる前記不平均力に対抗できることから、従来行っていたコンクリート防護の規模を縮小し、あるいは、コンクリート防護自体を省略することができる。このため、管継手構造を構築するための手間と時間の縮小に寄与している。   Thus, when the convex part 21 of the inner periphery of the push ring 11 enters into the concave part 22 of the outer periphery of the insertion slot 1, the force (FIG. 1 (b) arrow) a), b, and arrows c, d), the convex portion 21 and the concave portion 22 mesh with each other to counter the pull-out force. That is, the convex portion 21 enters the concave portion 22 to prevent the insertion port 1 from coming out of the receiving port 2 and can counter the above-mentioned non-average force generated in the pipes p and p ′. The scale can be reduced or the concrete protection itself can be omitted. For this reason, it contributes to the reduction of the effort and time for constructing a pipe joint structure.

この管継手構造を有する継手部10の構築方法を、図3に基づいて説明すると、まず、図3(a)から(b)に示すように、挿し口1の外周にゴム輪12を嵌めて取り付ける。   The construction method of the joint portion 10 having this pipe joint structure will be described with reference to FIG. 3. First, as shown in FIGS. 3 (a) to 3 (b), a rubber ring 12 is fitted on the outer periphery of the insertion opening 1. Install.

つぎに、そのゴム輪12の後端側に、図3(c)に示すように、押し輪11を取り付ける。押し輪11は、図1(c)及び図2に示すように、その内周側に円筒状の部材(前記本体部11aに相当)を有する対の円弧状部材15,15によって構成されている。   Next, the push ring 11 is attached to the rear end side of the rubber ring 12 as shown in FIG. As shown in FIGS. 1 (c) and 2, the push ring 11 is constituted by a pair of arc-shaped members 15, 15 having a cylindrical member (corresponding to the main body portion 11 a) on the inner peripheral side thereof. .

すなわち、押し輪11は、半円状の円弧状部材15,15同士が、その端部にそれぞれ設けた連結部15a,15aを介して連結されて、環状を成すようになっている。
連結部15a,15aは、管軸方向にフラット面を有する板状を成し、それぞれその板状の部分を表裏に貫通する貫通孔15b,15bを有している。
In other words, the push ring 11 is formed in a ring shape by connecting semicircular arc-shaped members 15 and 15 via connecting portions 15a and 15a provided at the ends thereof.
The connecting portions 15a and 15a have a plate shape having a flat surface in the tube axis direction, and have through holes 15b and 15b that respectively penetrate the plate-like portions on the front and back sides.

その各連結部15a,15aを管軸方向に重ね、対応する貫通孔15b,15bが同一の位置に来るようにする。さらに、その貫通孔15b,15bに連結ボルト16を挿通してナット16aで締付けて、円弧状部材15,15同士を環状に連結する(図2(b)参照)。この連結ボルト16は、受口2のフランジ部4に設けたねじ孔5にも挿通されるから、そのナット16aの締付けによって、前記接合ボルト13及びナット14と同じ機能も発揮するようになっている。
なお、この連結ボルト16とナット16aに関し、受口2のねじ孔5には挿通しないで(接合ボルト13及びナット14と同じ機能を有さないで)、専ら、円弧状部材15,15同士を環状に連結することのみを目的とした構成を採用してもよい。
The connecting portions 15a and 15a are overlapped in the tube axis direction so that the corresponding through holes 15b and 15b are at the same position. Further, the connecting bolt 16 is inserted into the through holes 15b and 15b and tightened with the nut 16a to connect the arcuate members 15 and 15 in an annular shape (see FIG. 2B). Since the connecting bolt 16 is also inserted into the screw hole 5 provided in the flange portion 4 of the receiving port 2, the same function as the joining bolt 13 and the nut 14 is exhibited by tightening the nut 16 a. Yes.
In addition, regarding this connection bolt 16 and nut 16a, do not pass through the screw hole 5 of the receiving port 2 (not having the same function as the joining bolt 13 and the nut 14), and exclusively connect the arc-shaped members 15 and 15 to each other. You may employ | adopt the structure aiming only at connecting cyclically | annularly.

ナット16aを締付けて押し輪11が環状になり、図3(c)から(d)に示すように、凸部21が凹部22に入り込んで、挿し口1と押し輪11とが動かないように固定される。最後に、図3(d)から(e)に示すように、前記接合ボルト13にナット14を締めつける。
このとき、前記連結ボルト16とナット16a、及び、前記接合ボルト13とナット14の各締付け度合いは、それぞれ一気に最後まで締付けるのではなく、両者が均等な締付け力を維持しながら、徐々にゴム輪12が環状空間内に押し込まれていくよう、交互に少しずつ締付けていく手法を採用することができる。
As shown in FIGS. 3C to 3D, the nut 16a is tightened so that the projection 21 enters the recess 22 so that the insertion slot 1 and the push ring 11 do not move. Fixed. Finally, as shown in FIGS. 3D to 3E, a nut 14 is fastened to the joining bolt 13.
At this time, the tightening degrees of the connecting bolt 16 and the nut 16a, and the joining bolt 13 and the nut 14 are not tightened all at once, but gradually while maintaining the equal tightening force. It is possible to adopt a technique of alternately tightening little by little so that 12 is pushed into the annular space.

このように、押し輪11が周方向に分割されていることによって、押し輪11の取り付けの際に、その押し輪11は、図3(c)に矢印で示すように、挿し口1の外周面にあてがえばよく、管軸方向にスライドさせて位置合わせする必要がない。このため、その押し輪11の凸部21が挿し口1の外周面に食い込んで傷つけたり、あるいは、防食のために施された外面塗装を損傷させたりする事態を防ぐことができる。また、凹部22と凸部21の噛み合わせによって、その位置合わせも容易である。   Thus, when the push ring 11 is divided | segmented into the circumferential direction, when attaching the push ring 11, the push ring 11 is the outer periphery of the insertion port 1 as shown by the arrow in FIG.3 (c). What is necessary is just to apply to a surface, and it is not necessary to slide and align in a pipe-axis direction. Therefore, it is possible to prevent a situation in which the convex portion 21 of the push ring 11 bites into and damages the outer peripheral surface of the insertion slot 1 or damages the outer surface coating applied for corrosion prevention. Further, the positioning of the concave portion 22 and the convex portion 21 is also easy.

さらに、この実施形態では、前記凸部21を成す突条の中心線方向、及びそれが入り込み凹部22を成す溝の中心線方向とは、前記受口2及び前記挿し口1における管軸方向に対して直交する面内に配置されている。このため、前記不平均力Aが生じた際に、受口2から挿し口1が抜け出そうとする管軸方向への動きに対し、その中心線方向が直交する方向となって、より高い抜け出し防止の効果が期待できる。   Furthermore, in this embodiment, the direction of the center line of the ridge that forms the convex portion 21 and the direction of the center line of the groove that forms the concave portion 22 are the tube axis direction of the receiving port 2 and the insertion port 1. It arrange | positions in the surface orthogonal to. For this reason, when the non-average force A is generated, the center line direction is orthogonal to the movement in the tube axis direction from which the insertion port 1 is about to come out from the receiving port 2, and the higher withdrawal force is obtained. The prevention effect can be expected.

なお、その変形例として、前記凸部21を成す突条の中心線方向、及びそれが入り込み凹部22を成す溝の中心線方向が、前記受口2及び前記挿し口1における管軸方向に対して直交する面に対して交差する方向であっても、凹部22に凸部21が噛み合っていれば、所定の抜け出し防止の効果が発揮できることには変わりない。   As a modification thereof, the direction of the center line of the ridge that forms the convex portion 21 and the direction of the center line of the groove that forms the concave portion 22 with respect to the tube axis direction of the receiving port 2 and the insertion port 1 are as follows. Even in the direction intersecting with the orthogonal plane, if the convex portion 21 is engaged with the concave portion 22, the effect of preventing the predetermined slipping out can be exhibited.

また、この実施形態では、押し輪11のフランジ部11bは、本体部11aの管軸方向中ほどから立ち上がる構成としたが、このフランジ部11bは、従来例のように本体部11aの後端部付近から立ち上がる場合も想定され、この実施形態の形状の押し輪11に限定されるものではない。これは、後述の各実施形態においても同様である。   In this embodiment, the flange portion 11b of the push ring 11 rises from the middle of the main body portion 11a in the tube axis direction. However, the flange portion 11b has a rear end portion of the main body portion 11a as in the conventional example. A case of rising from the vicinity is also assumed, and the present invention is not limited to the push ring 11 having the shape of this embodiment. The same applies to each embodiment described later.

(第二の実施形態)
第二の実施形態を図5及び図6に示す。この実施形態は、前述の第一の実施形態に対し、前記各円弧状部材15,15の連結部15a,15aの形態を変更したものである。
(Second embodiment)
A second embodiment is shown in FIGS. In this embodiment, the form of the connecting portions 15a and 15a of the respective arcuate members 15 and 15 is changed with respect to the first embodiment.

すなわち、押し輪11は、半円状の円弧状部材15,15同士が、その端部にそれぞれ設けた連結部15a,15aを介して連結されて、環状を成すようになっている点は、第一の実施形態と同様である。
連結部15a,15aは、管軸c周りの周方向に直交する方向にフラット面を有する板状を成し、それぞれその板状の部分を表裏に貫通する貫通孔15b,15bを有している。この実施形態では、各連結部15aのフラット面の面方向は、前記管軸cを通る面方向(管軸c周りの周方向に直交する方向)となっているが、その面方向は、対向する連結部15a,15a同士を重ねあわすことができ、且つ、連結ボルト16及びナット16aで締付け可能であれば任意の方向であってよい。
That is, the push ring 11 is configured such that the semicircular arc-shaped members 15 and 15 are connected to each other via connecting portions 15a and 15a provided at the end portions thereof to form an annular shape. This is the same as in the first embodiment.
The connecting portions 15a and 15a have a plate shape having a flat surface in a direction orthogonal to the circumferential direction around the tube axis c, and have through holes 15b and 15b penetrating through the plate-like portions on the front and back sides, respectively. . In this embodiment, the surface direction of the flat surface of each connecting portion 15a is a surface direction passing through the tube axis c (a direction perpendicular to the circumferential direction around the tube axis c), but the surface direction is opposite. As long as the connecting portions 15a, 15a can be overlapped with each other and can be tightened with the connecting bolt 16 and the nut 16a, the connecting portions 15a may be in any direction.

その各連結部15a,15aを、挿し口1周りの周方向に重ね、対応する貫通孔15b,15bが同一の位置に来るようにする。さらに、その貫通孔15b,15bに連結ボルト16を挿通してナット16aで締付けて、円弧状部材15,15同士を環状に連結する(図5(a)参照)。接合ボルト13及びナット14の扱い等については、前述の実施形態と同様であるので、説明を省略する。   The connecting portions 15a and 15a are overlapped in the circumferential direction around the insertion slot 1 so that the corresponding through holes 15b and 15b are at the same position. Further, the connecting bolt 16 is inserted into the through holes 15b and 15b and tightened with the nut 16a to connect the arcuate members 15 and 15 in an annular shape (see FIG. 5A). Since the handling of the joining bolt 13 and the nut 14 is the same as that in the above-described embodiment, the description thereof is omitted.

(第三の実施形態)
第三の実施形態を図7及び図8に示す。この実施形態は、押し輪11と受口2との間に、屈曲防止ボルト17を設けたものである。
(Third embodiment)
A third embodiment is shown in FIGS. In this embodiment, an anti-bending bolt 17 is provided between the push wheel 11 and the receiving port 2.

この実施形態において、押し輪11のフランジ部11bには、周方向に沿って、管軸方向に伸びる複数のねじ孔11eが設けられている。この実施形態では、接合ボルト13に対応する前記貫通孔11dと、このねじ孔11eとを周方向に沿って一つずつ交互に配置している。   In this embodiment, the flange portion 11b of the push wheel 11 is provided with a plurality of screw holes 11e extending in the tube axis direction along the circumferential direction. In this embodiment, the through holes 11d corresponding to the joining bolts 13 and the screw holes 11e are alternately arranged one by one along the circumferential direction.

このねじ孔11eに、屈曲防止ボルト17が挿し口1側から受口2側へ向かってねじ込まれている。また、その屈曲防止ボルト17の前端17bは、受口2のフランジ部4の挿し口1側端面に当接している。   A bending prevention bolt 17 is screwed into the screw hole 11e from the insertion port 1 side toward the receiving port 2 side. Further, the front end 17 b of the bending prevention bolt 17 is in contact with the end surface of the flange portion 4 of the receiving port 2 on the insertion port 1 side.

このように、屈曲防止ボルト17の前端17bが、前記受口2のフランジ部4の端面に当たることで、前記不平均力の発生に伴う、受口2からの挿し口1の抜け出しをさらに確実に防止することができる。例えば、図中に矢印e,fで示すような曲げ方向の外力に対し、屈曲防止ボルト17と受口2のフランジ部4とが、矢印g,hのように対抗し得るのである。   In this way, the front end 17b of the bending prevention bolt 17 hits the end surface of the flange portion 4 of the receiving port 2, so that the insertion port 1 can be more securely pulled out from the receiving port 2 due to the generation of the non-average force. Can be prevented. For example, the bending prevention bolt 17 and the flange portion 4 of the receiving port 2 can counter the external force in the bending direction as indicated by arrows e and f in the figure as indicated by arrows g and h.

この管継手構造を有する継手部10の構築方法を説明すると、前述の図3(a)〜(e)と同じ手法、手順により、押し輪11の貫通孔11dと前記受口2のねじ孔5とに挿通された接合ボルト13にナット14をねじ込むことで、ゴム輪12が前記環状空間内に押し込まれる(図7(b)参照)。   The construction method of the joint portion 10 having this pipe joint structure will be described. The through hole 11d of the press ring 11 and the screw hole 5 of the receiving port 2 are processed in the same manner and procedure as those shown in FIGS. 3 (a) to 3 (e). The rubber ring 12 is pushed into the annular space by screwing the nut 14 into the joining bolt 13 inserted through (see FIG. 7B).

その後、前記押し輪11の全てのねじ孔11eに、図7(c)に示すように、屈曲防止ボルト17をねじ込み、その前端17bを受口2のフランジ部4の端面に当接させ、作業が完了する。   After that, as shown in FIG. 7C, the bending prevention bolt 17 is screwed into all the screw holes 11e of the push ring 11, and the front end 17b is brought into contact with the end face of the flange portion 4 of the receiving port 2. Is completed.

なお、この実施形態では、接合ボルト13と屈曲防止ボルト17とを周方向に沿って交互に配置しているが、その配置は、自由に設定できる。例えば、周方向に沿って、接合ボルト13、屈曲防止ボルト17、屈曲防止ボルト17、接合ボルト13、屈曲防止ボルト17、接合ボルト13・・・といった順に、周方向に隣り合う接合ボルト13,13の間に2本の屈曲防止ボルト17を配置してもよいし、逆に、周方向に隣り合う屈曲防止ボルト17,17の間に2本の接合ボルト13を配置するなどしてもよい。
なお、屈曲防止ボルト17を採用する際、押し輪11の連結部15aの形態については、図7及び図8に示す態様以外のものも採用し得る。例えば、図5及び図6に示すものであってもよいし、環状に一体に形成された押し輪11であってもよい。
In addition, in this embodiment, although the joining bolt 13 and the bending prevention bolt 17 are arrange | positioned alternately along the circumferential direction, the arrangement | positioning can be set freely. For example, along the circumferential direction, the joining bolt 13, the bending prevention bolt 17, the bending prevention bolt 17, the joining bolt 13, the bending prevention bolt 17, the joining bolt 13,. Two anti-bending bolts 17 may be arranged between the two anti-bending bolts. Conversely, two joining bolts 13 may be arranged between the anti-bending bolts 17 and 17 adjacent in the circumferential direction.
In addition, when employ | adopting the bending prevention volt | bolt 17, about the form of the connection part 15a of the push ring 11, things other than the aspect shown in FIG.7 and FIG.8 can also be employ | adopted. For example, what is shown in FIG.5 and FIG.6 may be sufficient, and the push ring 11 integrally formed in cyclic | annular form may be sufficient.

上記の各実施形態では、凸部21と凹部22の態様については、凸部21は、管軸周りの全周に亘って、等しい幅及び等しい突出高さで連続的に形成された突条とし、その突条の中心線方向は、その継手部10を構成する前記受口2及び前記挿し口1における管軸方向に対して直交する面内に配置している。また、前記挿し口1の外周の凹部22は、その凸部21に対応して、同じく、管軸周りの全周に亘って、等しい幅及び等しい深さで連続的に形成された溝としている。
この凸部21と凹部22の他の態様としては、例えば、突条からなる凸部21の幅や突出高さ、あるいはその両方が周方向に沿って途中で変化する態様としてもよい。このとき、対応する溝からなる凹部22もそれに合わせて、凸部21がしっくりと入り込むことができる態様とすることはもちろんである。このようにすると、挿し口1に対する押し輪11の取り付け方位(管軸c周りの方位)が決定される。
In each of the above embodiments, with respect to the aspect of the convex portion 21 and the concave portion 22, the convex portion 21 is a ridge formed continuously with the same width and the same protruding height over the entire circumference around the tube axis. The center line direction of the protrusion is arranged in a plane orthogonal to the tube axis direction in the receiving port 2 and the insertion port 1 constituting the joint portion 10. Further, the concave portion 22 on the outer periphery of the insertion port 1 is a groove that is formed continuously with the same width and the same depth over the entire circumference around the tube axis, corresponding to the convex portion 21. .
As another aspect of this convex part 21 and the recessed part 22, it is good also as an aspect from which the width | variety and protrusion height of the convex part 21 which consist of a protrusion, or both change in the middle along the circumferential direction, for example. At this time, it is needless to say that the concave portions 22 made of the corresponding grooves can be adapted so that the convex portions 21 can enter smoothly. If it does in this way, the attachment azimuth | direction (direction around the pipe axis c) of the push ring 11 with respect to the insertion slot 1 will be determined.

また、これらの各態様における突条や溝の中心線方向は、その継手部10を構成する前記受口2及び前記挿し口1における管軸方向に対して直交する面に交差する方向に配置してもよい。   Further, the center line direction of the ridges and grooves in each of these aspects is arranged in a direction intersecting with a plane orthogonal to the tube axis direction of the receiving port 2 and the insertion port 1 constituting the joint portion 10. May be.

さらに、その凸部21を周方向に沿って連続的とせず、断続的としてもよい。また、単一の又は複数の凸部21を、押し輪11の内周面の任意の位置に設けてもよい。それぞれの態様において、凹部22は、その凸部21に対応した形状、大きさ、位置とすることはもちろんである。   Furthermore, the convex portion 21 may not be continuous along the circumferential direction but may be intermittent. Moreover, you may provide the single or several convex part 21 in the arbitrary positions of the internal peripheral surface of the push ring 11. FIG. In each aspect, the concave portion 22 is of course the shape, size, and position corresponding to the convex portion 21.

また、上記の各実施形態では、半円状の円弧状部材15を二つ一組で用いて押し輪11を構成したが、押し輪11は環状に一体成型されたものでもよいし、三つ一組、四つ一組、あるいはそれ以上の数からなる円弧状部材15を環状に連結して押し輪11を構成するようにしてもよい。   Further, in each of the above embodiments, the push ring 11 is configured by using two semicircular arc-shaped members 15 in pairs. However, the push ring 11 may be integrally formed in an annular shape, The push ring 11 may be configured by connecting the arcuate members 15 formed of one set, four sets, or more in a ring shape.

1 挿し口
2 受口
4 フランジ部
5 ねじ孔
9,10 継手部
11 押し輪
11a 本体部
11b フランジ部
11d 貫通孔
11e ねじ孔
12 ゴム輪
13 接合ボルト
14 ナット
15 円弧状部材
16 連結ボルト
17 屈曲防止ボルト
17b 前端
20 ロック機構
21 凸部(突条)
22 凹部(溝)
p 直管(管体)
p’ 異形管(管体)
DESCRIPTION OF SYMBOLS 1 Insertion port 2 Receiving port 4 Flange part 5 Screw hole 9,10 Joint part 11 Push ring 11a Main body part 11b Flange part 11d Through-hole 11e Screw hole 12 Rubber ring 13 Joint bolt 14 Nut 15 Arc-shaped member 16 Connection bolt 17 Prevention of bending Bolt 17b Front end 20 Lock mechanism 21 Convex part (ridge)
22 Recess (groove)
p Straight pipe (tube)
p 'deformed tube (tube)

Claims (5)

受口(2)内に挿し口(1)を挿入し、その受口(2)の内周面と挿し口(1)の外周面との間の環状空間にゴム輪(12)を介在させ、前記挿し口(1)の外周に環状の押し輪(11)を取り付けて、その押し輪(11)で前記ゴム輪(12)を前記環状空間内に押し込んで固定した管継手構造において、
前記押し輪(11)の内周に内径方向に向く凸部(21)を設け、前記挿し口(1)の外周に凹部(22)を設け、その凸部(21)が前記凹部(22)に入り込むことにより、前記受口(2)からの前記挿し口(1)の抜け出しを防止していることを特徴とする管継手構造。
The insertion opening (1) is inserted into the receiving opening (2), and a rubber ring (12) is interposed in the annular space between the inner peripheral surface of the receiving opening (2) and the outer peripheral face of the insertion opening (1). In the pipe joint structure in which an annular push ring (11) is attached to the outer periphery of the insertion opening (1), and the rubber ring (12) is pushed into the annular space by the push ring (11) and fixed.
A convex portion (21) facing the inner diameter direction is provided on the inner periphery of the push ring (11), and a concave portion (22) is provided on the outer periphery of the insertion port (1), and the convex portion (21) is the concave portion (22). The pipe joint structure is characterized in that the insertion port (1) is prevented from coming out of the receiving port (2) by entering.
前記受口(2)又は前記挿し口(1)は、異形管の管端部に設けられたものであることを特徴とする請求項1に記載の管継手構造。   The pipe joint structure according to claim 1, wherein the receiving port (2) or the insertion port (1) is provided at a pipe end portion of a deformed pipe. 前記押し輪(11)は、複数の円弧状部材(15,15)が周方向に沿って連結されることにより環状に形成されていることを特徴とする請求項1又は2に記載の管継手構造。   The pipe joint according to claim 1 or 2, wherein the push ring (11) is formed in an annular shape by connecting a plurality of arc-shaped members (15, 15) along a circumferential direction. Construction. 前記円弧状部材(15,15)同士の連結は、前記各円弧状部材(15,15)の端部に設けた連結部(15a,15a)を重ね、その連結部(15a,15a)同士を連結ボルト(16)で接合して行われることを特徴とする請求項3に記載の管継手構造。   The arc-shaped members (15, 15) are connected to each other by overlapping the connecting portions (15a, 15a) provided at the ends of the arc-shaped members (15, 15), and connecting the connecting portions (15a, 15a) to each other. The pipe joint structure according to claim 3, wherein the pipe joint structure is performed by joining with a connecting bolt (16). 前記押し輪(11)は、管軸方向に伸びる筒状の本体部(11a)と、その本体部(11a)から管径方向外側に立ち上がるフランジ部(11b)とを備え、前記本体部(11a)の前端(11c)が、前記ゴム輪(12)の後端部(12b)に当接しており、
前記押し輪(11)のフランジ部(11b)に、管軸方向に伸びる貫通孔(11d)とねじ孔(11e)とを設け、前記受口(2)の端部には、管径方向外側に立ち上がるフランジ部(4)が設けられており、前記受口(2)のフランジ部(4)にねじ孔(5)が設けられて、
前記押し輪(11)の貫通孔(11d)と前記受口(2)のねじ孔(5)とに挿通された接合ボルト(13)にナット(14)をねじ込むことで、前記ゴム輪(12)が前記環状空間内に押し込まれるようになっており、前記押し輪(11)のねじ孔(11e)にねじ込まれた屈曲防止ボルト(17)の前端が、前記受口(2)のフランジ部(4)の端面に当接していることを特徴とする請求項1乃至4のいずれか一つに記載の管継手構造。
The push ring (11) includes a cylindrical main body portion (11a) extending in the tube axis direction, and a flange portion (11b) rising from the main body portion (11a) in the tube radial direction, and the main body portion (11a). ) Is in contact with the rear end (12b) of the rubber ring (12),
A through hole (11d) and a screw hole (11e) extending in the tube axis direction are provided in the flange portion (11b) of the push ring (11), and the outer end in the tube radial direction is provided at the end of the receiving port (2). A flange portion (4) that rises to the flange portion (4) of the receiving port (2) is provided with a screw hole (5),
By screwing a nut (14) into a joining bolt (13) inserted through the through hole (11d) of the push ring (11) and the screw hole (5) of the receiving port (2), the rubber ring (12 ) Is pushed into the annular space, and the front end of the anti-bending bolt (17) screwed into the screw hole (11e) of the push ring (11) is the flange portion of the receiving port (2). The pipe joint structure according to any one of claims 1 to 4, wherein the pipe joint structure is in contact with an end face of (4).
JP2009052201A 2009-03-05 2009-03-05 Pipe joint structure Pending JP2010203580A (en)

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JP2015143524A (en) * 2013-12-25 2015-08-06 コスモ工機株式会社 Pipe joint
WO2017169531A1 (en) * 2016-03-28 2017-10-05 株式会社クボタ Pipe joint, separation prevention member, and pipe joining method
KR101866793B1 (en) * 2017-10-12 2018-06-12 신우종합철강(주) Method and apparatus for connecting pipe using secession preventing housing with rounded groove
KR102185497B1 (en) * 2020-03-23 2020-12-02 주식회사 고리 Pipe with enhanced bending strength and seismic resistance

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JPH07332556A (en) * 1994-06-10 1995-12-22 Kubota Corp Separation preventing pipe joint
JPH112374A (en) * 1997-06-11 1999-01-06 Kurimoto Ltd Separation preventing pipe joint
JP2000130662A (en) * 1998-10-22 2000-05-12 Kanto Chutetsu Kk Connection type pressing ring
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015143524A (en) * 2013-12-25 2015-08-06 コスモ工機株式会社 Pipe joint
WO2017169531A1 (en) * 2016-03-28 2017-10-05 株式会社クボタ Pipe joint, separation prevention member, and pipe joining method
TWI628386B (en) * 2016-03-28 2018-07-01 久保田股份有限公司 Pipe joint, separation preventive member, and method of connecting pipes
CN108884955A (en) * 2016-03-28 2018-11-23 株式会社久保田 Pipe fitting, disengaging prevent component and tube-joining method
CN108884955B (en) * 2016-03-28 2020-07-03 株式会社久保田 Pipe joint, separation preventing member, and pipe joining method
KR101866793B1 (en) * 2017-10-12 2018-06-12 신우종합철강(주) Method and apparatus for connecting pipe using secession preventing housing with rounded groove
KR102185497B1 (en) * 2020-03-23 2020-12-02 주식회사 고리 Pipe with enhanced bending strength and seismic resistance

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