JP2013019463A - Earthquake-resistant pipe fitting - Google Patents

Earthquake-resistant pipe fitting Download PDF

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JP2013019463A
JP2013019463A JP2011152988A JP2011152988A JP2013019463A JP 2013019463 A JP2013019463 A JP 2013019463A JP 2011152988 A JP2011152988 A JP 2011152988A JP 2011152988 A JP2011152988 A JP 2011152988A JP 2013019463 A JP2013019463 A JP 2013019463A
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earthquake
joint
pipes
fastening
side end
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Shigeki Kanao
茂樹 金尾
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Kanaflex Corp Co Ltd
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Kanaflex Corp Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an earthquake-resistant pipe fitting capable of absorbing the displacement of a connected pipe while water-tightness is maintained with no need of forming a spigot and a socket for exclusive use.SOLUTION: The earthquake-resistant pipe fitting includes: a cylindrical fitting body 4, into which each connecting side end of two pipes having a smooth outer surface is inserted; fixing brackets 5, 6, which are split by single or multiple cuts, have connection parts at the divided portions, and are mounted on the outer surface of the fitting body covering the connecting side ends; and fastening parts 7, 8, which fix the connecting side ends of the two pipes via the fitting body by the fixing brackets by connecting and fastening the connection parts of the fixing brackets. The fixing body comprises an elastic member. An expansion/contraction part 4a, which is bulged with approximately a U shaped cross section toward the inside of the fitting body and continuous in an annular shape in the circumferential direction, is provided at the center part in a cylinder axis direction. Each end at the opening side of the expansion/contraction part is covered by a connecting part 4d formed so as to be easily cut, elongated, and contracted.

Description

本発明は、地中埋設用の合成樹脂管を接続する耐震管継手に関するものである。   The present invention relates to an earthquake resistant pipe joint for connecting a synthetic resin pipe for underground use.

従来、図4に示すように、挿口50をその挿口50の外径よりも有意に大きい内径を有するように形成された受口51に挿入して管同士を接続する耐震継手が知られている。   Conventionally, as shown in FIG. 4, there is known an earthquake-resistant joint in which an insertion port 50 is inserted into a receiving port 51 formed to have an inner diameter significantly larger than the outer diameter of the insertion port 50 and pipes are connected to each other. ing.

この種の耐震継手では、挿口50を受口51内に挿入すると、挿口50の先端部外周に形成された挿口突部50aが、受口51に設けられたロックリング51aを押し拡げるようにして受口奥部に進入し、接続が完了する。このような接続構造の下では地震によって継手部分に抜け出し方向の力が作用しても、挿口突部50aが後退して受口51のロックリング51aと当接するまでは、管長について数%の伸びが許容されるようになっている(例えば、特許文献1参照)。   In this type of seismic joint, when the insertion port 50 is inserted into the receiving port 51, the insertion projection 50 a formed on the outer periphery of the distal end of the insertion port 50 expands the lock ring 51 a provided on the receiving port 51. In this way, it enters the back of the receptacle and the connection is completed. Under such a connection structure, even if a force in the pull-out direction is applied to the joint portion due to an earthquake, several% of the pipe length is required until the insertion protrusion 50a moves backward and comes into contact with the lock ring 51a of the receiving port 51. Elongation is allowed (see, for example, Patent Document 1).

なお、図4において、符号51bはロックリング51aを支持している芯出しゴムであり、51cは受口51の開口側端部の内壁に収納されたシール用ゴムである。   In FIG. 4, reference numeral 51 b is a centering rubber that supports the lock ring 51 a, and 51 c is a sealing rubber that is housed on the inner wall of the opening side end of the receiving port 51.

特開2003−185068号公報JP 2003-185068 A

しかしながら、上記した従来の耐震継手では、挿口50を受口51に接続するにあたり、挿口突部50aを通過させるためのクリアランスを挿口外面と受口内面との間に設ける必要があるため、そのクリアランスが、挿口50を受口51に接続した後も隙間として残る。   However, in the conventional earthquake-resistant joint described above, when the insertion port 50 is connected to the receiving port 51, it is necessary to provide a clearance for allowing the insertion port protrusion 50a to pass between the outer surface of the insertion port and the inner surface of the receiving port. The clearance remains as a gap even after the insertion port 50 is connected to the receiving port 51.

したがって、挿口50と受口51が接続された状態で地盤の垂直方向の変動によって挿口50と受口51に大きさの異なる荷重が作用すると、シール用ゴム51cの圧縮性が周方向で不均一となり、その結果、水密性が保てなくなるという問題がある。   Therefore, when a load having a different size acts on the insertion port 50 and the receiving port 51 due to the vertical fluctuation of the ground with the insertion port 50 and the receiving port 51 connected to each other, the compressibility of the sealing rubber 51c is increased in the circumferential direction. As a result, there is a problem that watertightness cannot be maintained.

また、上記耐震継手では、接続対象となる管の一方端部に専用の挿口を形成し、他方端部に専用の受口を形成しなければならず、このような特殊な継手構造は、円筒状の管同士を接続する場合に比べ、構成が複雑になり地中埋設管の管路を設計する際に制約を受けるという問題もある。   Further, in the above earthquake-resistant joint, a dedicated insertion port must be formed at one end of the pipe to be connected, and a dedicated receiving port must be formed at the other end. Compared to the case of connecting cylindrical pipes, there is also a problem that the configuration becomes complicated and there is a restriction when designing the pipes of underground pipes.

本発明は以上のような従来の耐震継手における課題を考慮してなされたものであり、専用の挿口、受口を形成する必要がなく、しかも水密性を維持したまま、管路全体の変位を吸収することができる耐震管継手を提供するものである。   The present invention has been made in consideration of the problems in the conventional seismic joint as described above, and it is not necessary to form a dedicated insertion port and receiving port, and the displacement of the entire pipeline is maintained while maintaining watertightness. It is intended to provide a seismic pipe joint that can absorb the above.

本発明は、外面が平滑な二つの管の各接続側端部が挿入される筒状の継手本体と、
一つ割りまたは複数割りに分割され、分割部分に相互が一対となる接続部を有し、上記接続側端部を覆っている上記継手本体の外面に装着される固定金具と、
上記固定金具の上記接続部を連結して締め付けることにより、上記継手本体を介し上記二つの管の接続側端部を上記固定金具で固定する締結部品とを有し、
上記継手本体が弾性部材からなり、その筒軸方向中央部に、継手本体内側に向けて断面U字状に膨出し周方向には環状に連続する伸縮部が備えられ、その伸縮部の開口側各端部が、切断・延伸・収縮しやすく形成された連結部によってカバーされている耐震管継手である。
The present invention is a tubular joint body into which the connection side ends of two pipes having smooth outer surfaces are inserted;
A fixing bracket mounted on the outer surface of the joint body, which is divided into one or a plurality of parts, has a connection part that is a pair in the divided part, and covers the connection side end part;
Fastening by connecting and fastening the connection portion of the fixing bracket, and fastening parts for fixing the connection side end of the two pipes with the fixing bracket via the joint body,
The joint main body is made of an elastic member, and is provided with an expansion / contraction part that bulges in a U-shaped cross section toward the inside of the joint main body in the cylindrical axial direction and continues in an annular shape in the circumferential direction. Each end portion is a seismic tube joint that is covered with a connecting portion that is easily cut, stretched, and contracted.

本発明において、上記連結部の厚さは0.5〜5.0mmの範囲であることが好ましい。なお、5.0mmを上回る場合であっても、連結部に切断・延伸・収縮しやすいような切り込みを設ければ、切断・延伸・収縮しやすいという効果を得ることができる。なお、切り込み以外にも、連結部の一部を局所的に薄肉にすることも考られる。一方、連結部の厚さが0.5mmを下回った場合には、成形が行いにくいことに加えて、管と継手本体を埋設する際に破断してしまう虞がある。   In this invention, it is preferable that the thickness of the said connection part is the range of 0.5-5.0 mm. In addition, even if it is a case where it exceeds 5.0 mm, the effect that it will be easy to cut | disconnect, extend | stretch, and shrink | contract can be acquired if a cut | interruption which is easy to cut | disconnect, extend | stretch, and shrink | contract in the connection part. In addition to cutting, it is also conceivable to locally thin a part of the connecting portion. On the other hand, when the thickness of the connecting portion is less than 0.5 mm, it is difficult to perform molding, and there is a possibility that the pipe and the joint body may be broken when embedded.

本発明において、上記接続側端部を覆っている上記継手本体の内面に粘着層もしくは一体成形された軟質合成ゴム等を設けることが好ましい。粘着層を設けると、管成形時に表面に形成される凹凸を吸収したり、締結部品で締め付けた際のねじれ・しわの発生を防止することができる。   In the present invention, it is preferable to provide an adhesive layer or an integrally molded soft synthetic rubber on the inner surface of the joint body covering the connection side end. When the adhesive layer is provided, it is possible to absorb unevenness formed on the surface at the time of tube forming and to prevent generation of twisting and wrinkling when tightened with a fastening part.

本発明によれば、管の接続側端部に専用の挿口、受口を形成する必要がなく、水密性を維持した状態で、接続している管の変位を吸収することができるという長所を有する。   According to the present invention, there is no need to form a dedicated insertion port and receiving port at the connection side end of the tube, and the displacement of the connected tube can be absorbed while maintaining watertightness. Have

本発明に係る耐震管継手の構成を、中心軸より上方を切断して示す正面図である。It is a front view which cut | disconnects and shows the structure of the earthquake-resistant pipe joint which concerns on this invention above a center axis | shaft. 図1の継手本体の構成を示す拡大断面図である。It is an expanded sectional view which shows the structure of the coupling main body of FIG. (a)〜(c)は耐震管継手が、接続している管の変位を吸収する様子を示す説明図である。(a)-(c) is explanatory drawing which shows a mode that a seismic-resistant pipe joint absorbs the displacement of the pipe which has connected. 従来の耐震継手の構成を、中心軸より上方を切断して示す正面図である。It is a front view which cut | disconnects and shows the structure of the conventional seismic joint from the center axis | shaft.

以下、図面に示した実施の形態に基づいて本発明を詳細に説明する。   Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.

図1は本発明に係る耐震管継手の構成を示すものであり、複合管(管)の中心線CLより上側は断面構造を示し、中心線より下側は外観を示している。   FIG. 1 shows a structure of a seismic pipe joint according to the present invention, in which the upper side of the center line CL of the composite pipe (pipe) shows a cross-sectional structure, and the lower side of the center line shows the appearance.

同図に示す耐震管継手1は、若干隙間を空けて挿入された複合管2、3の各接続側端部を接続するようになっている。   The earthquake-resistant pipe joint 1 shown in the figure connects the connection side end portions of the composite pipes 2 and 3 inserted with a slight gap.

(1)複合管
接続対象となる複合管2の構成は本発明を制限するものではないが、例えば、高密度ポリエチレンからなる管体を金属補強材で補強したものが好ましい。詳しくは、高密度ポリエチレンからなる内管2aの外周面に、高密度ポリエチレンからなる断面凸状の補強部2bが螺旋状に巻回され、その補強部2bの山部2cに同じく高密度ポリエチレンからなる外管2dが架け渡され、内管2aの内面および外管2dの外面がそれぞれ平滑(フラット)な構成となっている。
(1) Composite pipe Although the structure of the composite pipe 2 to be connected does not limit the present invention, for example, a pipe made of high-density polyethylene is preferably reinforced with a metal reinforcing material. Specifically, a reinforcing portion 2b having a convex cross section made of high density polyethylene is spirally wound around the outer peripheral surface of the inner tube 2a made of high density polyethylene, and the peak portion 2c of the reinforcing portion 2b is also made of high density polyethylene. The outer tube 2d is stretched over, and the inner surface of the inner tube 2a and the outer surface of the outer tube 2d are respectively smooth (flat).

外管2d内にはその外管2dと一体に金属補強材2eが埋設されており、複合管2の変形に追従しながら外力に対抗できるようになっている。   A metal reinforcing member 2e is embedded in the outer tube 2d integrally with the outer tube 2d so that it can counter external force while following the deformation of the composite tube 2.

複合管3は複合管2と同じ構成からなり、3aは内管、3bは補強部、3cは山部、3dは外管、3eは金属補強材である。   The composite tube 3 has the same configuration as the composite tube 2, 3a is an inner tube, 3b is a reinforcing portion, 3c is a mountain portion, 3d is an outer tube, and 3e is a metal reinforcing material.

(2)耐震管継手
(2-1)耐震管継手の構成
耐震管継手1は、対向配置された複合管2の接続側端部2fと複合管3の接続側端部3fとが両側から挿入される筒状の継手本体4と、複合管挿入後に、それら接続側端部2f、3fを覆っている継手本体4の外面に装着される金属製のカラー(固定金具)5、6と、それらカラー5、6をそれぞれ周方向に締め付ける締結部品7、8とから主として構成されている。
(2) Structure of earthquake-resistant pipe joint (2-1) Structure of earthquake-resistant pipe joint In the earthquake-resistant pipe joint 1, the connection side end 2f of the composite pipe 2 and the connection side end 3f of the composite pipe 3 are inserted from both sides. A cylindrical joint body 4, and metal collars (fixing brackets) 5 and 6 mounted on the outer surface of the joint body 4 covering the connection side ends 2f and 3f after the composite pipe is inserted, It is mainly composed of fastening parts 7 and 8 for fastening the collars 5 and 6 in the circumferential direction, respectively.

(2-2)継手本体
図2は上記継手本体4を拡大した断面図である。
(2-2) Joint Body FIG. 2 is an enlarged sectional view of the joint body 4.

同図において、継手本体4は弾性部材、例えばCR、EPDM、SBR、NBR、フッ素ゴム、シリコンゴム等の合成ゴムを筒状に成型したものからなり、管軸方向中央部に伸縮部4aが設けられている。   In the figure, the joint body 4 is made of an elastic member, for example, a synthetic rubber such as CR, EPDM, SBR, NBR, fluorine rubber, silicon rubber, etc., which is molded into a cylindrical shape, and an expansion / contraction portion 4a is provided at the central portion in the tube axis direction. It has been.

この伸縮部4aは、継手本体4の内側に向けて断面U字状に膨出しており、円周方向には環状に連続する凸条を形成している。   The stretchable portion 4a bulges in a U-shaped cross section toward the inside of the joint body 4, and forms a ridge that continues in an annular shape in the circumferential direction.

本発明に係る耐震管継手の特徴の一つは、上記伸縮部4aの開口側各端部(環状溝部)が、切断・延伸・収縮しやすく形成された連結部4dによってカバーされていることにある。   One of the features of the earthquake-resistant pipe joint according to the present invention is that each opening side end portion (annular groove portion) of the expansion and contraction portion 4a is covered with a connecting portion 4d formed so as to be easily cut, extended and contracted. is there.

図1に示したように、上記伸縮部4aは連結部4dによってカバーされているため、複合管2、3を接続した継手本体4の周囲に土砂を埋め戻す際は、埋め戻しの土砂が伸縮部4aの中空部分S内に進入することが防止される。一方、地震等によって地盤が変動し、例えば複合管2、3が離れる方向に変位した場合は、連結部4dが切断または延伸され、伸縮部4aが自由に変形することにより変位を吸収するようになっている。なお、変位のパターンについては後述する。   As shown in FIG. 1, since the expansion / contraction part 4a is covered by the connecting part 4d, when the earth and sand are backfilled around the joint body 4 to which the composite pipes 2 and 3 are connected, the backfilling earth and sand is expanded and contracted. The entry into the hollow portion S of the portion 4a is prevented. On the other hand, when the ground fluctuates due to an earthquake or the like, for example, when the composite pipes 2 and 3 are displaced away from each other, the connecting portion 4d is cut or stretched, and the expansion and contraction portion 4a freely deforms to absorb the displacement. It has become. The displacement pattern will be described later.

したがって、上記連結部4dは切断しやすい構成であることが必要である。本実施形態では伸縮部4aの厚さtを5〜15mmとし、切断しやすい連結部4dの厚さt′を0.5〜5.0mmの範囲に設定している。   Accordingly, the connecting portion 4d needs to be configured to be easily cut. In the present embodiment, the thickness t of the stretchable portion 4a is set to 5 to 15 mm, and the thickness t ′ of the connecting portion 4d that is easy to cut is set to a range of 0.5 to 5.0 mm.

なお、切断しやすい構成としては、連結部4dの厚さを薄くすることに限らず、連結部4dの一部にノッチのような切り込みを設けることもできる。   In addition, as a structure which is easy to cut | disconnect, not only reducing the thickness of the connection part 4d, but a notch like notch can also be provided in a part of the connection part 4d.

図2において、伸縮部4aの左側には複合管2の接続側端部2f(図1参照)を覆うことができる管被着部4eが形成され、右側には複合管3の接続側端部3f(図1参照)に被着される管被着部4fが形成されている。   In FIG. 2, a tube adherence portion 4e capable of covering the connection side end 2f (see FIG. 1) of the composite tube 2 is formed on the left side of the expansion / contraction part 4a, and the connection side end of the composite tube 3 is formed on the right side. A tube attaching portion 4f to be attached to 3f (see FIG. 1) is formed.

管被着部4e、4fの外面には浅い凹部4g、4hが形成されており、これらの凹部4g,4hにカラー5、6(図1参照)を装着することにより、カラー5、6の位置決めができるとともに、管被着部4e、4fとの間のずれを防止しながら継手本体4を複合管2、3に対し確実に締め付けることができるようになっている。   Shallow recesses 4g and 4h are formed on the outer surfaces of the tube adherence portions 4e and 4f, and the collars 5 and 6 are positioned by attaching the collars 5 and 6 (see FIG. 1) to these recesses 4g and 4h. In addition, the joint body 4 can be securely fastened to the composite pipes 2 and 3 while preventing displacement between the pipe adherent portions 4e and 4f.

一方、管被着部4e、4fの内面には若干隆起する状態で隆起部4i、4jが形成されており、これらの隆起部4i、4jには浅い凹部4k、4lが形成されており、これらの凹部4k、4lには例えば加硫していない状態のブチルゴム、両面テープ、一体成形した軟質ゴム等からなるシート状の粘着層4m、4nが貼着されている。   On the other hand, raised portions 4i and 4j are formed on the inner surfaces of the tube adherent portions 4e and 4f in a slightly raised state, and shallow recessed portions 4k and 4l are formed on these raised portions 4i and 4j. In the recesses 4k and 4l, for example, sheet-like adhesive layers 4m and 4n made of unvulcanized butyl rubber, double-sided tape, integrally molded soft rubber, and the like are attached.

それにより、継手本体4の両側から複合管2、3を挿入し、継手本体4を複合管2、3に対して締め付けると、まず、粘着層4m、4nが複合管2、3の接続側端部2f、3f(図1参照)と当接するようになっている。   Accordingly, when the composite pipes 2 and 3 are inserted from both sides of the joint body 4 and the joint body 4 is fastened to the composite pipes 2 and 3, first, the adhesive layers 4 m and 4 n are connected to the connection side ends of the composite pipes 2 and 3. It comes into contact with the portions 2f and 3f (see FIG. 1).

なお、4o、4pは複合管2、3の挿入を容易にさせるためのテーパ部である。   Reference numerals 4o and 4p denote tapered portions for facilitating insertion of the composite tubes 2 and 3.

(2-3)カラー
図1において、カラー5は例えばステンレス鋼製からなる上下一対の帯板状鋼板からなり、複合管2の接続側端部2fを被覆している継手本体4の外面に装着されるようになっている。
(2-3) Color In FIG. 1, the collar 5 is made of a pair of upper and lower strip-shaped steel plates made of stainless steel, for example, and is mounted on the outer surface of the joint body 4 covering the connection side end 2 f of the composite pipe 2. It has come to be.

また、上下一対のカラー5は接続された際にその接続部分に重ね代が確保できる長さに形成されている。   Further, the pair of upper and lower collars 5 are formed in such a length that an overlap margin can be secured at the connection portion when connected.

上側から装着されるカラー5の円周方向各端部には直径方向にフランジ部5aが突出して形成されており、下側から装着されるカラー5の円周方向各端部にも同様にフランジ部5aが突出して形成されており、一対のカラー5を組み合わせると、フランジ部5aが対向する(図1の手前側および奥側)ようになっている。これら対向するフランジ部5aには後述するボルトを挿通するための貫通孔が設けられている。   A flange portion 5a is formed to protrude in the diametrical direction at each circumferential end of the collar 5 mounted from the upper side, and the flange 5a is similarly flanged at each circumferential end of the collar 5 mounted from the lower side. The portion 5a is formed so as to protrude, and when the pair of collars 5 are combined, the flange portion 5a is opposed (front side and back side in FIG. 1). These opposing flange portions 5a are provided with through holes for inserting bolts described later.

(2-4)締結部品
上記対向するフランジ部5aの貫通孔には締結部品7としての六角頭付きボルト7aの首部が挿入され、ナット7bで締め付け固定されるようになっている。
(2-4) Fastening component The neck portion of the hexagon head bolt 7a as the fastening component 7 is inserted into the through hole of the opposing flange portion 5a, and is fastened and fixed by the nut 7b.

なお、カラー6およびその締結部品8は、上記カラー5および締結部品7と同じ構成であるため説明を省略する。   The collar 6 and the fastening part 8 thereof have the same configuration as the collar 5 and the fastening part 7 and will not be described.

(3)耐震管継手の動作
図3(a)〜(c)は、耐震管継手1に接続されている複合管2、3が変位した場合の継手本体4の追従状態を示す説明図である。
(3) Operation of Seismic Pipe Joint FIGS. 3A to 3C are explanatory views showing the follow-up state of the joint body 4 when the composite pipes 2 and 3 connected to the earthquake resistant pipe joint 1 are displaced. .

同図(a)は、複合管2、3が施工時よりも接近する方向に変位した場合の、継手本体4の追従状態を示すものである。   FIG. 4A shows the follow-up state of the joint body 4 when the composite pipes 2 and 3 are displaced in a direction closer to the construction.

複合管2、3の目地幅50mmが30mm縮んだ場合、中空の伸縮部4aは密着し、連結部4dは中空部分の圧力が増加した状態で収縮または折れ曲がる。   When the joint width 50 mm of the composite pipes 2 and 3 is reduced by 30 mm, the hollow elastic part 4a is in close contact, and the connecting part 4d is contracted or bent while the pressure in the hollow part is increased.

なお、上記目地幅50mmは、施工時における複合管2、3の接続側端部同士の間隔である。   The joint width of 50 mm is the distance between the connection side ends of the composite pipes 2 and 3 at the time of construction.

同図(b)は、複合管2、3の接続側端部が施工時よりも離間する方向に変位した場合の継手本体4の追従状態を示したものである。   FIG. 2B shows the follow-up state of the joint body 4 when the connection side ends of the composite pipes 2 and 3 are displaced in a direction away from the construction.

目地幅50mmがさらに30mm伸びた場合、連結部4dは引張荷重に耐え切れずに破断し、U字状の伸縮部4aは円弧状に変位するが、管被着部4eは複合管2に追従し、管被着部4fは複合管3に追従している。   When the joint width 50 mm is further extended by 30 mm, the connecting portion 4d breaks without being able to withstand the tensile load, and the U-shaped expansion / contraction portion 4a is displaced in an arc shape, but the tube adherent portion 4e follows the composite tube 2. However, the tube adherent portion 4 f follows the composite tube 3.

同図(c)は一方の複合管3の地盤が沈下した場合の継手本体4の追従状態を示した説明図である。   FIG. 3C is an explanatory view showing the following state of the joint body 4 when the ground of one composite pipe 3 sinks.

複合管3の地盤が50mm沈下した場合、連結部4dは斜め下方向に加わる引張荷重に耐え切れずに破断し、U字状の伸縮部4aはフック状に変位するが、管被着部4eは複合管2に追従し、管被着部4fは複合管3に追従している。   When the ground of the composite pipe 3 sinks by 50 mm, the connecting part 4d breaks without enduring the tensile load applied obliquely downward, and the U-shaped expansion / contraction part 4a is displaced in a hook shape, but the pipe attaching part 4e. Follows the composite tube 2, and the tube adherent portion 4 f follows the composite tube 3.

このように、連結部4dは、伸縮部4aの中空部分S(図)をカバーすることにより複合管2、3を接続する際には土砂が中空の伸縮部4a内に進入するのを防止しているが、地震等によって地盤がさらに大きく変動し、複合管2と3の接続側端部がさらに大きく変位した場合には、自ら切断してその変位を吸収するようになっている。   In this way, the connecting part 4d prevents the earth and sand from entering the hollow elastic part 4a when connecting the composite pipes 2 and 3 by covering the hollow part S (FIG.) Of the elastic part 4a. However, when the ground fluctuates further due to an earthquake or the like, and the connecting side end of the composite pipes 2 and 3 is further displaced, it is cut by itself to absorb the displacement.

それにより、耐震管継手の耐震性能を高めることができるようになっている。   Thereby, the seismic performance of the seismic pipe joint can be enhanced.

1 耐震管継手
2,3 複合管(管)
2a 内管
2b 補強部
2c 山部
2d 外管
2e 金属補強材
2f 接続側端部
4 継手本体
4a 伸縮部
4b 内面
4c 仕切外周部
4d 連結部
4e,4f 管被着部
4g,4h 凹部
4m,4n 粘着層
5,6 カラー(固定金具)
7,8 締結部品
1 Earthquake-resistant pipe joints 2, 3 Composite pipe (pipe)
2a Inner pipe 2b Reinforcement part 2c Mountain part 2d Outer pipe 2e Metal reinforcement 2f Connection side end part 4 Joint body 4a Expansion / contraction part 4b Inner surface 4c Partition outer peripheral part 4d Connection part 4e, 4f Pipe adherence part 4g, 4h Concave part 4m, 4n Adhesive layer 5, 6 Color (fixing bracket)
7,8 Fastening parts

Claims (3)

外面が平滑な二つの管の各接続側端部が挿入される筒状の継手本体と、
一つ割りまたは複数割りに分割され、分割部分に相互が一対となる接続部を有し、上記接続側端部を覆っている上記継手本体の外面に装着される固定金具と、
上記固定金具の上記接続部を連結して締め付けることにより、上記継手本体を介し上記二つの管の接続側端部を上記固定金具で固定する締結部品とを有し、
上記継手本体が弾性部材からなり、その筒軸方向中央部に、継手本体内側に向けて断面U字状に膨出し周方向には環状に連続する伸縮部が備えられ、その伸縮部の開口側各端部が、切断・延伸・収縮しやすく形成された連結部によってカバーされていることを特徴とする耐震管継手。
A cylindrical joint body into which each connection side end of two pipes having smooth outer surfaces is inserted;
A fixing bracket mounted on the outer surface of the joint body, which is divided into one or a plurality of parts, has a connection part that is a pair in the divided part, and covers the connection side end part;
Fastening by connecting and fastening the connection portion of the fixing bracket, and fastening parts for fixing the connection side end of the two pipes with the fixing bracket via the joint body,
The joint main body is made of an elastic member, and is provided with an expansion / contraction part that bulges in a U-shaped cross section toward the inside of the joint main body in the cylindrical axial direction and continues in an annular shape in the circumferential direction. Each end portion is covered with a connecting portion formed so as to be easily cut, stretched, and contracted.
上記連結部の厚さが0.5〜5.0mmの範囲である請求項1に記載の耐震管継手。   The earthquake-resistant pipe joint according to claim 1, wherein the thickness of the connecting portion is in the range of 0.5 to 5.0 mm. 上記接続側端部を覆っている上記継手本体の内面に粘着層が設けられている請求項1または2に記載の耐震管継手。   The earthquake-resistant pipe joint according to claim 1 or 2, wherein an adhesive layer is provided on an inner surface of the joint body covering the connection side end.
JP2011152988A 2011-07-11 2011-07-11 Earthquake-resistant pipe fitting Pending JP2013019463A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7530255B2 (en) 2020-09-17 2024-08-07 積水化学工業株式会社 Pipe fittings, piping and piping systems

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54128921U (en) * 1978-02-28 1979-09-07
JPS5559894U (en) * 1978-10-19 1980-04-23

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54128921U (en) * 1978-02-28 1979-09-07
JPS5559894U (en) * 1978-10-19 1980-04-23

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7530255B2 (en) 2020-09-17 2024-08-07 積水化学工業株式会社 Pipe fittings, piping and piping systems

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