JP4808757B2

JP4808757B2 - Branch

Info

Publication number: JP4808757B2
Application number: JP2008253928A
Authority: JP
Inventors: 義貴中居; 稔橋詰
Original assignee: Aron Kasei Co Ltd
Current assignee: Aron Kasei Co Ltd
Priority date: 2008-09-30
Filing date: 2008-09-30
Publication date: 2011-11-02
Anticipated expiration: 2028-09-30
Also published as: JP2010084838A

Description

本発明は大径管に枝管を接合するために用いられ、大径管に設けられた穴に結合されて継手となる支管に関する。 The present invention relates to a branch pipe that is used to join a branch pipe to a large-diameter pipe and is connected to a hole provided in the large-diameter pipe to form a joint.

従来、大径管に枝管を接合するための継手部を簡易に構成する方法として、大径管の側壁に設けた穴に継手となる管を支管として結合する方法が種々提供されている。
実開昭５４−１４８９３１号公報には、大径管である下水本管（Ａ）に枝管を接合するため、支管として分岐管継手（Ｂ）を用いた技術が開示されている。この技術においては、分岐管継手（Ｂ）の差口（２）に、複数の切込み（３）を設けることで弾性を持たせた複数の係止片（４）を形成している。そしてこのような構成とすることで、分岐管継手（Ｂ）を簡易に下水本管（Ａ）に取り付けることができるようにしている。
特許第２９０１３２５号公報には、支管継手（Ｂ１）の差口（２）に切欠き（４）による突起縁（５）を設け、縮径保持用リング（６）を用いて差口（２）を縮径状態にして本管（Ａ）に差し込むようにしている。このような構成とすることで、支管継手（Ｂ１）の差し込みを容易にできるようにしている。
実開昭５４−１４８９３１号公報特許第２９０１３２５号公報 2. Description of the Related Art Conventionally, as a method for easily configuring a joint portion for joining a branch pipe to a large diameter pipe, various methods for connecting a pipe serving as a joint as a branch pipe to a hole provided in a side wall of the large diameter pipe have been provided.
Japanese Utility Model Laid-Open No. 54-148931 discloses a technique using a branch pipe joint (B) as a branch pipe in order to join a branch pipe to a sewage main pipe (A) which is a large diameter pipe. In this technique, a plurality of locking pieces (4) are provided with elasticity by providing a plurality of cuts (3) at the opening (2) of the branch pipe joint (B). And by setting it as such a structure, the branch pipe coupling (B) can be easily attached to a sewer main pipe (A).
In Japanese Patent No. 2901325, a projecting edge (5) by a notch (4) is provided in a difference port (2) of a branch pipe joint (B1), and a reduced diameter holding ring (6) is used to connect the difference port (2). Is reduced in diameter and inserted into the main pipe (A). With such a configuration, the branch pipe joint (B1) can be easily inserted.
Japanese Utility Model Publication No. 54-148931 Japanese Patent No. 2901325

上記特許文献１に示す分岐管継手においては、複数の係止片（４）が差口（２）の全周にあるため、分岐管継手（Ｂ）を下水本管（Ａ）に差し込んで取り付けるのに力が必要となる。また係止片（４）を少なくしても、取り付けの際には分岐管継手（Ｂ）を接続孔（９）の中心に合わせながら押し込まねばならず、やはり力を要する。また取り付けた後においても、分岐管継手（Ｂ）が接続孔（９）の中心からずれていると、係止片（４）の引っ掛かりが均一ではなくなり、係止片（４）が抜け易い問題がある。
上記特許文献２に示す支管継手の場合は、縮径保持用リング（６）が別途必要となり、部品点数が増加する問題と、取り付け作業が面倒であるという問題がある。 In the branch pipe joint shown in Patent Document 1 above, since the plurality of locking pieces (4) are on the entire circumference of the outlet (2), the branch pipe joint (B) is inserted into the sewage main pipe (A) and attached. Power is required to Even if the number of the locking pieces (4) is reduced, it is necessary to push the branch pipe joint (B) while aligning it with the center of the connection hole (9) when mounting. In addition, even after the attachment, if the branch pipe joint (B) is displaced from the center of the connection hole (9), the catch of the locking piece (4) is not uniform, and the locking piece (4) is likely to come off. There is.
In the case of the branch pipe joint shown in Patent Document 2, a reduced diameter retaining ring (6) is required separately, and there is a problem that the number of parts increases and a mounting work is troublesome.

そこで本発明は上記従来技術の問題を解決し、複数の部材を必要とすることなく、一体物とし、それによって部品点数を１つとし、また大径管への結合作業が容易で、簡単に取り付けることができる、簡易な継手手段としての支管の提供を課題とする。 Therefore, the present invention solves the above-mentioned problems of the prior art, and does not require a plurality of members, so that it is a single body, thereby making the number of parts one, and connecting to a large diameter pipe is easy and simple. It is an object to provide a branch pipe as a simple joint means that can be attached.

上記課題を達成するための本発明の支管は、大径管に枝管を接合するために、大径管の側壁に設けられる結合用穴に結合される支管であって、前記大径管の結合用穴に対して差し込まれる差込筒部と、前記枝管を受け入れる受入筒部と、結合用穴の周りに着座されるフランジ部とを備え、
前記差込筒部には、該差込筒部が大径管の結合用穴に差し込まれた際に結合用穴の背面に係合する複数の係合用爪と、前記結合用穴の内面に当接することで支管の差し込みをガイドする複数の突状ガイドとを備え、
前記複数の係合用爪の少なくとも１つを、結合用穴の背面との係合長さを他の係合用爪に比べて長くした先行差込用爪として形成し、
前記先行差込用爪に対向する位置に少なくとも１つの係合用爪を対向爪として形成し、且つ前記対向爪の先端から支管の軸心までの径を、大径管の結合用穴の半径と略同じにしてあることを第１の特徴としている。
また本発明の支管は、上記第１の特徴に加えて、突状ガイドの先端から支管の軸心までの径を、大径管の結合用穴の半径よりも少し短くしていることを第２の特徴としている。
また本発明の支管は、上記第１又は第２の特徴に加えて、先行差込用爪と対向爪との間に他の係合用爪を中間爪として形成し、且つ前記中間爪の先端から支管の軸心までの径を、大径管の結合用穴の半径と略同じにしてあることを第３の特徴としている。
また本発明の支管は、上記第１〜第３の何れかの特徴に加えて、大径管の軸方向に対応するフランジ部分に対応して、先行差込用爪を形成していることを第４の特徴としている。
また本発明の支管は、上記第４の特徴に加えて、立設状態の大径管に対して結合されることを第５の特徴としている。
また本発明の支管は、上記第１〜第５の何れかの特徴に加えて、フランジ部の着座面に粘着材を施してあることを第６の特徴としている。
また本発明の支管は、上記第１〜第６の何れかの特徴に加えて、先行差込用爪とフランジ部との間隙寸法を他の係合用爪とフランジ部との間隙寸法よりも大きくしてあることを第７の特徴としている。 In order to achieve the above object, a branch pipe of the present invention is a branch pipe coupled to a coupling hole provided in a side wall of a large diameter pipe in order to join a branch pipe to the large diameter pipe. An insertion cylinder part to be inserted into the coupling hole, a receiving cylinder part for receiving the branch pipe, and a flange part seated around the coupling hole;
The insertion tube portion includes a plurality of engaging claws that engage with the back surface of the connection hole when the insertion tube portion is inserted into the connection hole of the large-diameter tube, and an inner surface of the connection hole. With a plurality of protruding guides that guide the insertion of the branch pipe by abutting ,
At least one of the plurality of engaging claws is formed as a leading insertion claw in which the engagement length with the back surface of the coupling hole is longer than that of the other engaging claws,
At least one engagement claw is formed as a counter claw at a position facing the preceding insertion claw, and the diameter from the tip of the counter claw to the axis of the branch pipe is defined as the radius of the coupling hole of the large diameter pipe The first feature is that they are substantially the same .
The branch pipe of the present invention, in addition to the first feature, that it is slightly shorter than the radius of the diameter holes for attachment of the large diameter tube from the tip of the collision-shaped guide to the axis of the branch pipe first It has 2 features.
In addition to the above first or second feature, the branch pipe of the present invention is formed with another engaging claw as an intermediate claw between the preceding insertion claw and the opposing claw, and from the tip of the intermediate claw. A third feature is that the diameter to the axis of the branch pipe is substantially the same as the radius of the coupling hole of the large diameter pipe.
In addition to any of the first to third features, the branch pipe of the present invention forms a leading insertion claw corresponding to the flange portion corresponding to the axial direction of the large diameter pipe. This is the fourth feature.
In addition to the fourth feature, the branch pipe of the present invention has a fifth feature that it is coupled to a large-diameter pipe in a standing state.
In addition to the first to fifth features, the branch pipe of the present invention has a sixth feature that an adhesive material is applied to the seating surface of the flange portion.
Further, in addition to any one of the first to sixth features, the branch pipe of the present invention has a gap dimension between the preceding insertion claw and the flange portion larger than a gap dimension between the other engagement claw and the flange portion. This is the seventh feature.

請求項１に記載の支管によれば、支管の差込筒部を、大径管の外側から結合用穴に対して差し込むことで、差込筒部の係合用爪が前記結合用穴の背面に係合し、結合がなされる。そして差込筒部が差し込まれる際には、差込筒部の突状ガイドが大径管の結合用穴の内面に当接することで、結合用穴に対する差込筒部の芯出し、差し込み姿勢が矯正され、その後の差し込みがスムーズに行える。
請求項１に記載の支管によれば、複数の部材を必要とすることなく、一体物とし、それによって部品点数を１個だけとすることができる。
また大径管への結合作業が容易で、簡単に取り付けることができる。
加えて、請求項１に記載の支管によれば、複数の係合用爪の少なくとも１つを、結合用穴の背面との係合長さを他の係合用爪に比べて長くした先行差込用爪として形成しているので、
支管を結合用穴に差し込んでいく際に、長くした先行差込用爪で結合用穴の背面に引っ掛け易い。よって先行差込用爪が先行して侵入するように支管を少し斜めに傾けて差し込むことで、先行差込用爪を先ず結合用穴の背面に引っ掛け、これをきっかけに他の係合用爪を引っ掛けることができる。即ち、先行差込用爪を先ず引っ掛けた後、支管の傾きを元に戻すようにして、残る係合用爪を容易に結合用穴の背面に引っ掛けることができる。よって、爪の長さを長くした先行差込用爪の存在により、支管を大径管の結合用穴に係合して取り付ける作業が容易となる。
また大径管の結合用穴の背面に支管の係合用爪が全て係合された状態において、支管が結合用穴内で多少位置ズレすることがあっても、長い先行差込用爪による係合が十分に確保されているので、支管が結合用穴から容易に脱落することが防止される。
更に請求項１に記載の支管によれば、先行差込用爪に対向する位置に少なくとも１つの係合用爪を対向爪として形成し、且つ前記対向爪の先端から支管の軸心までの径を、大径管の結合用穴の半径と略同じにしてあるので、
大径管の結合用穴の背面に先行差込用爪と対向爪が係合されることで、支管を大径管に取り付けることができる。その際、対向爪の先端から支管の軸心までの径を、大径管の結合用穴の半径と略同じにしてあるので、対向爪を結合用穴に接しながらも結合用穴の背面側にまで強制侵入させ或いは対向爪を結合用穴に僅かに接触することなく結合用穴の背面側にまで侵入させることができる。そして強制侵入された対向爪が結合用穴の背面に係合する。また対向爪と大径管の結合用穴との間に僅かな隙間がある場合でも、差し込まれた支管が僅かに位置ズレすることで、対向爪による結合用穴の背面への係合がなり、支管が容易に脱落するのが防止される。
請求項２に記載の支管によれば、上記請求項１に記載の構成による効果に加えて、突状ガイドの先端から支管の軸心までの径を、大径管の結合用穴の半径よりも少し短くしているので、
大径管の結合用穴に突状ガイドが当接するようにして支管の差し込みをガイドした後、前記突状ガイドを前記当接状態から解放することで、突状ガイドと結合用穴との間に少しの隙間が生じ、よって差し込み時とその後とで、支管が僅かに半径方向に位置ズレし、これによって係合用爪と結合用穴の背面との係合がなり、支管が容易に脱落するのが防止される。
請求項３に記載の支管によれば、上記請求項１又は２に記載の構成による効果に加えて、先行差込用爪と対向爪との間に他の係合用爪を中間爪として形成し、且つ前記中間爪の先端から支管の軸心までの径を、大径管の結合用穴の半径と略同じにしてあるので、
中間爪を結合用穴に接しながらも結合用穴の背面側にまで強制侵入させ或いは中間爪を結合用穴に僅かに接触することなく結合用穴の背面側にまで侵入させることができる。そして強制侵入された中間爪が結合用穴の背面に係合する。また中間爪と大径管の結合用穴との間に僅かな隙間がある場合でも、差し込まれた支管が僅かに位置ズレすることで、中間爪による結合用穴背面への係合がなり、前記先行差込用爪と対向爪とによる場合よりも更に安定した結合が得られ、脱落し難くなる。
請求項４に記載の支管によれば、上記請求項１〜３の何れかに記載の構成による効果に加えて、大径管の軸方向に対応するフランジ部分に対応して、先行差込用爪を形成しているので、
大径管の軸方向を目安にして支管の先行差込用爪を結合用穴に差し込むことができるので、支管の結合用穴への差込作業を容易に且つ正確な位置決め状態で行うことができる。
請求項５に記載の支管によれば、上記請求項４に記載の構成による効果に加えて、立設状態の大径管に対して結合されることにより、
支管の爪の長い先行差込用爪が大径管の上位の位置で結合用穴に係合されることになり、枝管等が接合された状態で加わる重力方向への土圧等に対しても、長い先行差込用爪の存在によって支管が外れ難く、結合を強く維持できる。
請求項６に記載の支管によれば、上記請求項１〜５の何れかに記載の構成による効果に加えて、フランジ部の着座面に粘着材を施してあるので、
支管を大径管の結合用穴に係合させた状態での結合力を高めることができる。
請求項７に記載の支管によれば、上記請求項１〜６の何れかに記載の構成による効果に加えて、先行差込用爪とフランジ部との間隙寸法を他の係合用爪とフランジ部との間隙寸法よりも大きくしてあるので、
支管を少し斜めに傾けて大径管の結合用穴に差し込んでいき、先行差込用爪を先行して結合用穴の背面に引っ掛ける際に、先行差込用爪とフランジ部との間隙寸法が大きいと、その分だけ引っ掛け易くなる。またその後に支管の傾きを元に戻すようにして、残る係合用爪を結合用穴の背面へ引っ掛ける際、既に係合している先行差込用爪の結合用穴背面に対する間隙寸法が大きいと、その大きい間隙寸法内でより自由に先行差込用爪の位置を変位させることができるので、残る係合用爪の引っ掛けが容易になる。 According to the branch pipe according to claim 1, by inserting the insertion tube portion of the branch tube into the coupling hole from the outside of the large-diameter tube, the engaging claws of the insertion tube portion are connected to the back surface of the coupling hole. To be coupled. When the insertion tube portion is inserted, the protruding guide of the insertion tube portion contacts the inner surface of the coupling hole of the large-diameter tube, so that the insertion tube portion is centered and inserted into the coupling hole. Is corrected, and subsequent insertion can be performed smoothly.
According to the branch pipe of the first aspect, it is possible to make a single body without the need for a plurality of members, thereby reducing the number of parts to one.
In addition, it can be easily attached to a large-diameter pipe and can be easily attached.
In addition, according to the branch pipe according to claim 1, at least one preceding difference the engagement length of the back of the coupling hole was longer than the other engaging claw nail engagement several Because it is formed as a built-in nail,
When inserting the branch pipe into the coupling hole, it is easy to hook it on the back of the coupling hole with a long leading insertion claw. Therefore, by inserting the branch pipe at a slight angle so that the preceding insertion claw will invade first, the first insertion claw is first hooked on the back of the coupling hole, and this triggers the other engagement claw. Can be hooked. In other words, after the hook for the leading insertion is first hooked, the inclination of the branch pipe is restored, and the remaining hook for engaging can be easily hooked on the back surface of the coupling hole. Therefore, due to the presence of the preceding insertion claw having a longer claw length, the operation of attaching the branch pipe by engaging with the coupling hole of the large diameter pipe is facilitated.
In addition, even if the branch pipe is slightly misaligned in the coupling hole in the state where all the coupling claws of the branch pipe are engaged with the back of the coupling hole of the large-diameter pipe, the engagement by the long leading insertion claw is possible. Is sufficiently secured, it is possible to prevent the branch pipe from easily falling out of the coupling hole.
According to yet branch pipe according to claim 1, the diameter of the at least one pawl for engaging in a position facing the nail ahead line difference write form as opposed claws, and the tip of the opposed claw to the axis of the branch pipe Is approximately the same as the radius of the coupling hole of the large diameter pipe,
The branch pipe can be attached to the large-diameter pipe by engaging the preceding insertion claw and the opposing claw on the back surface of the coupling hole of the large-diameter pipe. At that time, the diameter from the tip of the opposing claw to the axis of the branch pipe is made substantially the same as the radius of the coupling hole of the large diameter pipe, so the back side of the coupling hole is in contact with the coupling claw. Or the opposing claw can penetrate into the back side of the coupling hole without slightly contacting the coupling hole. Then, the opposed claws that are forcibly entered engage with the back surface of the coupling hole. Even if there is a slight gap between the opposing claw and the coupling hole of the large-diameter pipe, the inserted branch pipe is slightly displaced, so that the opposing claw can engage the back of the coupling hole. The branch pipe is prevented from falling off easily.
According to the branch pipe of claim 2, in addition to the effect of the configuration of claim 1 above, the diameter from the tip of the protruding guide to the axis of the branch pipe is made larger than the radius of the coupling hole of the large diameter pipe. Is a little shorter,
After guiding the insertion of the branch pipe so that the projecting guide abuts the coupling hole of the large-diameter pipe, the projecting guide is released from the abutting state, so that the projecting guide and the coupling hole are separated from each other. A small gap is generated in the tube, so that the branch pipe is slightly displaced in the radial direction when it is inserted and thereafter, so that the engagement claw and the back surface of the coupling hole are engaged, and the branch pipe easily falls off. Is prevented.
According to the third aspect of the present invention , in addition to the effect of the configuration according to the first or second aspect , another engaging claw is formed as an intermediate claw between the preceding insertion claw and the opposing claw. And, since the diameter from the tip of the intermediate claw to the axis of the branch pipe is substantially the same as the radius of the coupling hole of the large diameter pipe,
While the intermediate claw is in contact with the coupling hole, it can be forced to enter the back side of the coupling hole, or the intermediate claw can enter the back side of the coupling hole without slightly contacting the coupling hole. Then, the forcibly entered intermediate claw engages with the back surface of the coupling hole. In addition, even when there is a slight gap between the intermediate claw and the coupling hole of the large diameter pipe, the inserted branch pipe is slightly displaced, so that the intermediate claw is engaged with the coupling hole back surface, A more stable connection is obtained than in the case of the preceding insertion claw and the opposing claw, and it is difficult to drop off.
According to the branch pipe according to claim 4 , in addition to the effect of the configuration according to any one of claims 1 to 3 , for the leading insertion, corresponding to the flange portion corresponding to the axial direction of the large diameter pipe. Because the nail is formed
Since the axial insertion direction of the large-diameter pipe can be used as a guide, the branch insertion claw can be inserted into the coupling hole, so that the insertion work into the coupling hole of the branch pipe can be easily and accurately positioned. it can.
According to the branch pipe of the fifth aspect , in addition to the effect of the configuration of the fourth aspect , by being coupled to the large-diameter pipe in the standing state,
The leading insertion claw with a long branch claw will be engaged with the coupling hole at the upper position of the large-diameter pipe, and against the earth pressure in the direction of gravity, etc. applied with the branch pipe etc. joined However, it is difficult for the branch pipe to come off due to the presence of the long leading insertion nail, and the coupling can be maintained strongly.
According to the branch pipe according to claim 6 , in addition to the effect of the configuration according to any one of claims 1 to 5 , since the adhesive material is applied to the seating surface of the flange portion,
The coupling force in a state where the branch pipe is engaged with the coupling hole of the large-diameter pipe can be increased.
According to the branch pipe of the seventh aspect, in addition to the effect of the structure according to any one of the first to sixth aspects, the gap dimension between the preceding insertion claw and the flange portion is changed to another engagement claw and flange. Since it is larger than the gap dimension with the part,
Tilt the branch tube slightly diagonally and insert it into the coupling hole of the large-diameter pipe. If is large, it will be easier to hook. After that, when the remaining engaging claw is hooked on the back of the coupling hole so that the inclination of the branch pipe is returned to the original position, if the gap dimension of the preceding insertion claw already engaged with the back of the coupling hole is large Since the position of the leading insertion claw can be displaced more freely within the large gap dimension, the remaining engaging claw can be easily hooked .

以下の図面を参照して、本発明の実施の形態を詳細に説明する。
図１は本発明の実施形態に係る支管の使用状態を示す図、図２は本発明の支管を大径管に結合した状態を示す斜視図、図３は本実施形態に係る支管を受入筒部側から見た斜視図、図４は本実施形態に係る支管を差込筒部側から見た斜視図、図５は粘着材を施していない支管を差込筒部側から見た斜視図、図６は支管の底面図、図７は図６のＡ−Ａ断面図、図８は支管の取り付け途中の状態を示す断面図である。 Embodiments of the present invention will be described in detail with reference to the following drawings.
FIG. 1 is a view showing a use state of a branch pipe according to an embodiment of the present invention, FIG. 2 is a perspective view showing a state in which the branch pipe of the present invention is coupled to a large diameter pipe, and FIG. 3 is a receiving cylinder of the branch pipe according to the present embodiment. FIG. 4 is a perspective view of the branch pipe according to the present embodiment as viewed from the insertion tube portion side, and FIG. 5 is a perspective view of the branch tube without the adhesive material as viewed from the insertion tube portion side. 6 is a bottom view of the branch pipe, FIG. 7 is a cross-sectional view taken along line AA of FIG. 6, and FIG. 8 is a cross-sectional view showing a state in the middle of attachment of the branch pipe.

本発明に係る支管１は、例えば図１に示すように、家屋等の敷地内に発生した雨水や排水を、枝管２を用いて敷地内外の本管や枡に流していく際の配管の一部として用いることができる。この場合、枝管２が本管や枡の大径管３に接合されるわけであるが、大径管３の側壁の必要な箇所に結合用穴３ａが開けられ、この結合用穴３ａに対して支管１が結合される。そしてこの結合された支管１に対して枝管２が接続されることで配管がなされる。
図１、２に示す場合は、枡Ｍの立設管が、支管１が接合されるべき大径管３となっている。なお、枡Ｍには１乃至複数の他の管４が接続されてもよい。 For example, as shown in FIG. 1, the branch pipe 1 according to the present invention is a pipe for flowing rainwater or drainage generated in a site such as a house to a main pipe or a fence outside the site using a branch pipe 2. Can be used as part. In this case, the branch pipe 2 is joined to the main pipe or the large-diameter pipe 3 of the saddle, but a coupling hole 3a is opened in a necessary portion of the side wall of the large-diameter pipe 3, and the coupling hole 3a On the other hand, the branch pipe 1 is coupled. The branch pipe 2 is connected to the combined branch pipe 1 to form a pipe.
In the case shown in FIGS. 1 and 2, the standing pipe of the flange M is a large-diameter pipe 3 to which the branch pipe 1 is to be joined. One to a plurality of other pipes 4 may be connected to the rod M.

図３〜図８も参照して、前記支管１にはフランジ部１１が備えられている。このフランジ部１１は、大径管３の結合用穴３ａの周りに着座される。このためフランジ部１１は鞍状に湾曲した円形鍔として、支管１の円周に設けられている。 3 to 8, the branch pipe 1 is provided with a flange portion 11. The flange portion 11 is seated around the coupling hole 3 a of the large diameter pipe 3. For this reason, the flange part 11 is provided in the circumference | surroundings of the branch pipe 1 as a circular collar | curve curved in bowl shape.

支管１は受入筒部１２と差込筒部１３とからなる。
受入筒部１２は枝管２を受け入れる筒部である。受入筒部１２の下端外側周に前記フランジ部１１が形成されている。実施形態ではフランジ部１１は、受入筒部１２の外側面に一体に形成されている。しかし受入筒部１２と別体に形成したものを組み合わせるようにしてもよい。
受入筒部１２は、枝管２に対してＴＳ接合（テーパースリーブ接合）できるように、筒の内径が奥にいくに従って少しずつ小さくなるように構成している。勿論、Ｏリング等により水密性をもたせる構造にしてもよい。また可撓性を持つものであってもよい。 The branch pipe 1 includes a receiving cylinder part 12 and an insertion cylinder part 13.
The receiving cylinder part 12 is a cylinder part that receives the branch pipe 2. The flange portion 11 is formed on the outer periphery of the lower end of the receiving cylinder portion 12. In the embodiment, the flange portion 11 is integrally formed on the outer surface of the receiving cylinder portion 12. However, you may make it combine what was formed with the receiving cylinder part 12 separately.
The receiving cylinder portion 12 is configured so that the inner diameter of the cylinder gradually becomes smaller so that TS joining (taper sleeve joining) can be performed on the branch pipe 2. Of course, a structure that provides water tightness by an O-ring or the like may be used. Moreover, it may have flexibility.

前記差込筒部１３は大径管３の結合用穴３ａに差し込まれる筒部である。
差込筒部１３には係合用爪１４と突状ガイド１５とが備えられている。
前記差込筒部１３は、前記受入筒部１２に対して縮小段部１３ａを介して連続して形成されている。前記縮小段部１３ａは枝管２を受け入れる際の止端となる。
差込筒部１３の筒長は、前記大径管３の結合用穴３ａの穴の厚み（管の肉厚）よりも少しだけ長くなるような寸法とされる。その理由は、結合用穴３ａに差込筒部１３が差し込まれた際に、係合用爪１４が結合用穴３ａの背面に対して現に係合可能となるようにすると共に、背面と係合用爪１４との係合隙間が大きくなりすぎないようにするためである。係合隙間が大きくなりすぎると、係合が実質的にはなされていないことになる。
差込筒部１３の筒の外径寸法は、大径管３の結合用穴３ａの穴径寸法（２Ｒ）よりも多少小さくなるような寸法とする。これは差込筒部１３を、その係合用爪１４を伴って、結合用穴３ａに余裕を持って差し込むことができるようにすると共に、前記突状ガイド１５を差込筒部１３の外側面に形成できるようにし、該突状ガイド１５が結合用穴３ａの穴内壁に当接することで差込筒部１３をガイドできるようにするためである。 The insertion tube portion 13 is a tube portion that is inserted into the coupling hole 3 a of the large diameter tube 3.
The insertion tube portion 13 is provided with an engaging claw 14 and a protruding guide 15.
The insertion tube portion 13 is continuously formed with respect to the receiving tube portion 12 via a reduction step portion 13a. The reduced step portion 13a serves as a stop when the branch pipe 2 is received.
The tube length of the insertion tube portion 13 is set to a dimension that is slightly longer than the thickness of the coupling hole 3a of the large diameter tube 3 (the wall thickness of the tube). The reason for this is that when the insertion tube portion 13 is inserted into the coupling hole 3a, the engaging claws 14 are actually engageable with the rear surface of the coupling hole 3a, and the rear surface is engaged with the rear surface. This is to prevent the engagement gap with the claw 14 from becoming too large. If the engagement gap becomes too large, the engagement is not substantially made.
The outer diameter dimension of the tube of the plug-in cylinder portion 13 is set to be slightly smaller than the hole diameter dimension (2R) of the coupling hole 3a of the large diameter pipe 3. This allows the insertion tube portion 13 to be inserted into the coupling hole 3a with the engaging claws 14 with a margin, and the protruding guide 15 is connected to the outer surface of the insertion tube portion 13. This is because the insertion guide 13 can be guided by the projecting guide 15 coming into contact with the inner wall of the coupling hole 3a.

前記係合用爪１４は、差込筒部１３の下端の側縁から外方へ突出する状態にして、複数個形成している。その複数個の係合用爪１４のうちの１つを先行差込用爪１４ａとしている。
先行差込用爪１４ａは、他の係合用爪１４に比べて、結合用穴３ａの背面との係合長さをより長くしている。即ち、先行差込用爪１４ａの爪の長さＬ１を他の係合用爪１４の長さＬ２よりも長くしている（図６、図８参照）。
また先行差込用爪１４ａは、フランジ部１１との間隙寸法Ｓ１を、他の係合用爪１４とフランジ部１１との間隙寸法Ｓ２に比べて、より大きくしてある（図８参照）。間隙寸法Ｓ１を大きくすることで、先行差込用爪１４ａを先行して結合用穴３ａの背面に係合させる際に、支管１を傾けた状態で結合用穴３ａに差し込んでも、容易に先行差込用爪１４ａを結合用穴３ａの背面に係合させることができ、またこれによって後続する係合用爪１４の係合作業も容易となる。
先行差込用爪１４ａの先端付近の外面（結合用穴３ａの背面に対向しない側の面）は先端に向けて傾斜面を設けている。これによって、先行差込用爪１４ａが結合用穴３ａの穴内面に接する場合においても滑り易くなり、強制係合が容易になる。 A plurality of the engaging claws 14 are formed so as to protrude outward from the side edge of the lower end of the insertion tube portion 13. One of the plurality of engaging claws 14 is a leading insertion claw 14a.
The preceding insertion claw 14a has a longer engagement length with the back surface of the coupling hole 3a than the other engagement claw 14. That is, the length L1 of the claw for the leading insertion claw 14a is longer than the length L2 of the other engaging claw 14 (see FIGS. 6 and 8).
The leading insertion claw 14a has a gap dimension S1 with the flange portion 11 larger than a gap dimension S2 between the other engaging claws 14 and the flange portion 11 (see FIG. 8). By enlarging the gap dimension S1, when the leading insertion claw 14a is first engaged with the back surface of the coupling hole 3a, it can be easily advanced even if the branch pipe 1 is inserted into the coupling hole 3a in an inclined state. The insertion claw 14a can be engaged with the back surface of the coupling hole 3a, and the subsequent engagement operation of the engagement claw 14 is facilitated.
The outer surface near the tip of the leading insertion claw 14a (the surface not facing the back surface of the coupling hole 3a) is inclined toward the tip. Accordingly, even when the leading insertion claw 14a is in contact with the inner surface of the coupling hole 3a, it becomes slippery and the forced engagement is facilitated.

前記係合用爪１４の１つを対向爪１４ｂとして、先行差込用爪１４ａに対向する位置に形成している。本実施形態では、１つの先行差込用爪１４ａに対して１８０度の位置に１つの対向爪１４ｂを形成している。
対向爪１４ｂの爪の長さは、前記先行差込用爪１４ａの長さよりも短い。また対向爪１４ｂの爪の横幅は先行差込用爪１４ａと同寸法としている。しかし同寸法である必要はない。
重要なことは、対向爪１４ｂの先端から支管１の軸心Ｘまでの径Ｒ２を、大径管３の結合用穴３ａの半径Ｒとほぼ同じにしている点である。ほぼ同じ寸法にすることで、一旦対向爪１４ｂの係合がなされた後において、係合が容易に外れるのを防止することができる。実際には、対向爪１４ｂの前記径Ｒ２の方が結合用穴３ａの半径Ｒよりも僅かに大きくなるように構成している。これにより支管１の差し込みの際、対向爪１４ｂが結合用穴３ａの穴内壁にすれながら強制的に嵌め込まれ、結合用穴３ａの背面と係合される。また対向爪１４ｂの先端付近の外面は先端に向けて傾斜面を設けている。
なお当然であるが、先行差込用爪１４ａの先端から支管１の軸心Ｘまでの径Ｒ１は対向爪１４ｂの先端から支管１の軸心Ｘまでの径Ｒ２よりも長くなっている。 One of the engaging claws 14 is formed as a counter claw 14b at a position facing the preceding insertion claw 14a. In the present embodiment, one opposing claw 14b is formed at a position of 180 degrees with respect to one preceding insertion claw 14a.
The length of the claw of the opposing claw 14b is shorter than the length of the preceding insertion claw 14a. The width of the claw of the opposing claw 14b is the same as that of the preceding insertion claw 14a. However, they need not be the same size.
What is important is that the diameter R2 from the tip of the opposed claw 14b to the axis X of the branch pipe 1 is made substantially the same as the radius R of the coupling hole 3a of the large diameter pipe 3. By making the dimensions substantially the same, it is possible to prevent the engagement from being easily disengaged once the opposing claw 14b is once engaged. Actually, the diameter R2 of the opposing claw 14b is configured to be slightly larger than the radius R of the coupling hole 3a. Thus, when the branch pipe 1 is inserted, the opposing claw 14b is forcibly fitted while sliding on the inner wall of the coupling hole 3a, and is engaged with the back surface of the coupling hole 3a. The outer surface near the tip of the opposing claw 14b is provided with an inclined surface toward the tip.
Naturally, the diameter R1 from the tip of the leading insertion claw 14a to the axis X of the branch 1 is longer than the diameter R2 from the tip of the opposing claw 14b to the axis X of the branch 1.

前記係合用爪１４のうち、先行差込用爪１４ａと対向爪１４ｂ以外の係合用爪１４を中間爪１４ｃとしている。中間爪１４ｃは、先行差込用爪１４ａと対向爪１４ｂとの中間に設けられる。本実施形態では、ちょうど中間の位置に一対形成されている。
中間爪１４ｃは、必ずしも必要はないが、設けることで、支管１の全周に等間隔に係合用爪１４が存在することになり、一旦結合された支管１が大径管３の結合用穴３ａから外れたりするのを十分に防止することができ、支管１がより安定して結合用穴３ａに取り付けられることになる。
中間爪１４ｃの爪の横幅は先行差込用爪１４ａや対向爪１４ｂよりも短くしている。短くすることで、支管１を取り付ける際の力を軽減できるようにしている。
また中間爪１４ｃの爪の長さＬ２は対向爪１４ｂの長さと同じにしている。中間爪１４ｃの先端から支管１の軸心Ｘまでの径Ｒ３も、前記対向爪１４ｂの場合と同様に、大径管３の結合用穴３ａの半径Ｒとほぼ同じにしている。ほぼ同じ寸法にすることで、一旦中間爪１４ｃの係合がなされた後において、係合が容易に外れるのを防止することができる。実際には、中間爪１４ｃの前記径Ｒ３の方が結合用穴３ａの半径Ｒよりも僅かに大きくなるように構成している。これにより支管１の差し込みの際、中間爪１４ｃが結合用穴３ａの穴内壁にすれながら強制的に嵌め込まれ、結合用穴３ａの背面と係合される。また中間爪１４ｃの先端付近の外面は先端に向けて傾斜面を設けている。 Among the engaging claws 14, the engaging claws 14 other than the leading insertion claw 14a and the opposing claw 14b are used as an intermediate claw 14c. The intermediate claw 14c is provided between the preceding insertion claw 14a and the opposing claw 14b. In the present embodiment, a pair is formed at exactly the middle position.
The intermediate claw 14c is not necessarily required, but by providing the intermediate claw 14c, the engaging claw 14 is present at equal intervals on the entire circumference of the branch pipe 1, and the once connected branch pipe 1 is a coupling hole for the large-diameter pipe 3. Therefore, the branch pipe 1 can be more stably attached to the coupling hole 3a.
The lateral width of the nail of the intermediate claw 14c is shorter than the preceding insertion claw 14a and the opposing claw 14b. By shortening, the force at the time of attaching the branch pipe 1 can be reduced.
Further, the length L2 of the claw of the intermediate claw 14c is the same as the length of the opposing claw 14b. The diameter R3 from the tip of the intermediate claw 14c to the axis X of the branch pipe 1 is substantially the same as the radius R of the coupling hole 3a of the large diameter pipe 3 as in the case of the opposed claw 14b. By making the dimensions substantially the same, it is possible to prevent the engagement from being easily disengaged once the intermediate claw 14c is engaged. Actually, the diameter C3 of the intermediate claw 14c is configured to be slightly larger than the radius R of the coupling hole 3a. As a result, when the branch pipe 1 is inserted, the intermediate claw 14c is forcibly fitted into the hole inner wall of the coupling hole 3a and is engaged with the back surface of the coupling hole 3a. Further, the outer surface near the tip of the intermediate claw 14c is provided with an inclined surface toward the tip.

前記突状ガイド１５は、それが結合用穴３ａの穴の内面に当接することで、支管１の差し込みをガイドする機能を果たすものである。
本実施形態においては、先行差込用爪１４ａの両側、４５度付近に一対と、対向爪１４ｂの両側、４５度付近に一対が形成されている。が、先行差込用爪１４ａの両側に一対あれば、対向爪１４ｂの両側の一対は必ずしも設ける必要はない。設けた方が結合用穴３ａに取り付けられた支管１が安定する。
各突状ガイド１５は差込筒部１３の側壁に、差込筒部１３の軸線方向と平行になるようにして形成されている。突状ガイド１５の差込筒部１３側壁からの突出の状況は、先行差込用爪１４ａの両側にある一対の突状ガイド１５、１５は、壁面から先行差込用爪１４ａと同方向に立ち上がり、また対向爪１４ｂの両側にある一対の突状ガイド１５、１５は、壁面から対向爪１４と同方向に立ち上がるように形成されている。即ち、前記先行差込用爪１４ａ側の突状ガイド１５、１５と対向爪１４ｂ側の突状ガイド１５、１５とは、相互に逆方向に立ち上がって形成されている。
また突状ガイド１５の頂面は差込筒部１３の円周方向と略平行にカットされた面に形成されている。この突状ガイド１５の頂面が結合用穴３ａの内面に当接することで、差込筒部１３が結合用穴３ａに差し込まれていく際のガイドとなり、差込筒部１３の結合用穴３ａに対するセンター出しの役割を果たす。これによって差込筒部１３の軸心Ｘが結合用穴３ａの中心に合わせられ、係合用爪１４を備えた差込筒部１３が結合用穴３ａに対してスムーズに差し込まれる。
突状ガイド１５の先端（頂面）から支管１（差込筒部１３）の軸心Ｘまでの径（Ｒ４）は、結合用穴３ａの半径（Ｒ）よりも少し短くしている。これによって、支管１を結合用穴３ａに係合させたときに、結合用穴３ａと突状ガイド１５との間に小間隙が構成され、差込筒部１３が結合用穴３ａ内で僅かに位置ズレすることが可能となり、結果として対向爪１４ｂや中間爪１４ｃの結合用穴３ａ背面との係合が外れ難くなる。
勿論、前記径Ｒ４は前記半径Ｒより僅かだけ短くする。僅かだけであるので、差込筒部１３と結合用穴３ａとのセンター出しを突状ガイド１５によって行うことができる。よって差込筒部１３を結合用穴３ａに差し込む際には、差込筒部１３を結合用穴３ａの中心に合わせながら押し込む手間の悪さが解消され、上記スムーズな差し込みができる。 The protruding guide 15 fulfills the function of guiding the insertion of the branch pipe 1 by contacting the inner surface of the hole of the coupling hole 3a.
In the present embodiment, a pair is formed on both sides of the leading insertion claw 14a at around 45 degrees, and a pair is formed on both sides of the opposing claw 14b at around 45 degrees. However, if there is a pair on both sides of the leading insertion claw 14a, it is not always necessary to provide a pair on both sides of the opposing claw 14b. The provided branch stabilizes the branch pipe 1 attached to the coupling hole 3a.
Each protruding guide 15 is formed on the side wall of the insertion tube portion 13 so as to be parallel to the axial direction of the insertion tube portion 13. The projecting guide 15 protrudes from the side wall of the insertion tube portion 13 in the same direction as the pair of projecting guides 15 and 15 on both sides of the preceding insertion claw 14a in the same direction as the preceding insertion claw 14a. The pair of protruding guides 15, 15 that are standing up and on both sides of the opposing claw 14 b are formed so as to rise in the same direction as the opposing claw 14 from the wall surface. That is, the protruding guides 15 and 15 on the preceding insertion claw 14a side and the protruding guides 15 and 15 on the opposing claw 14b side are formed so as to rise in opposite directions.
Further, the top surface of the projecting guide 15 is formed on a surface that is cut substantially parallel to the circumferential direction of the insertion tube portion 13. The top surface of the projecting guide 15 abuts against the inner surface of the coupling hole 3a, so that the insertion tube portion 13 becomes a guide when the insertion tube portion 13 is inserted into the coupling hole 3a. It plays the role of centering out 3a. As a result, the axial center X of the insertion tube portion 13 is aligned with the center of the coupling hole 3a, and the insertion tube portion 13 provided with the engaging claws 14 is smoothly inserted into the coupling hole 3a.
The diameter (R4) from the tip (top surface) of the projecting guide 15 to the axis X of the branch pipe 1 (insertion tube portion 13) is slightly shorter than the radius (R) of the coupling hole 3a. As a result, when the branch pipe 1 is engaged with the coupling hole 3a, a small gap is formed between the coupling hole 3a and the projecting guide 15, and the insertion tube portion 13 is slightly in the coupling hole 3a. And the engagement of the opposing claw 14b and the intermediate claw 14c with the back surface of the coupling hole 3a is difficult to disengage.
Of course, the diameter R4 is slightly shorter than the radius R. Since it is only a few, centering of the insertion cylinder part 13 and the coupling hole 3a can be performed by the protruding guide 15. Therefore, when inserting the insertion cylinder part 13 in the coupling hole 3a, the trouble of pushing the insertion cylinder part 13 while aligning it with the center of the coupling hole 3a is eliminated, and the smooth insertion can be performed.

図４に示すように、前記フランジ部１１の大径管３への着座面、即ちフランジ部のうち差込筒部１３側の面に、粘着材１６を施している。また図５に示すように、粘着材１６は必ずしも施す必要はない。粘着材１６を施すことで、支管１が大径管３に接合された際に、支管１が脱落するのを予防することができる。また大径管３の結合用穴３ａの周りに密着するので、水漏れが少なくなる。
粘着材１６は、例えばブチルゴムを用いることができる。勿論、他の接着剤を用いてもよい。 As shown in FIG. 4, the adhesive material 16 is given to the seating surface to the large diameter pipe | tube 3 of the said flange part 11, ie, the surface at the side of the insertion cylinder part 13 among flange parts. Moreover, as shown in FIG. 5, the adhesive material 16 does not necessarily need to be applied. By applying the adhesive material 16, it is possible to prevent the branch pipe 1 from dropping off when the branch pipe 1 is joined to the large diameter pipe 3. Moreover, since it adheres around the coupling hole 3a of the large-diameter pipe 3, water leakage is reduced.
For example, butyl rubber can be used as the adhesive material 16. Of course, other adhesives may be used.

前記先行差込用爪１４ａは、その爪１４ａの中心位置が、大径管３の結合用穴３ａの周囲のうちの大径管３の軸心方向に対応する位置になるように係合させる。このため先行差込用爪１４ａは、大径管３の結合用穴３ａの周囲に着座されるフランジ部１１のうち、前記大径管３の軸心方向に対応するフランジ部分にちょうど対応して、形成している。このように先行差込用爪１４ａを形成することで、支管１を大径管３の結合用穴３ａに差し込む際、先行差込用爪１４ａが大径管３の長手方向に一致するようにして支管１（差込筒部１３）を差し込めばよいので、差し込みの際の位置合わせが容易となる。
本実施例では、フランジ部１１の受入筒部１２側の面に、先行差込用爪１４ａの位置を示す標示１７を設けている。この標示１７によって、支管１を結合用穴３ａに差し込む際の位置合わせが確実に行われる。前記標示１７は、対向爪１４ｂ、中間爪１４ｃ対応する位置にも設けることができる。
標示１７としては、浮き出た線の他、溝、その他、標示ができるものであればよい。 The preceding insertion claw 14a is engaged so that the center position of the claw 14a is a position corresponding to the axial center direction of the large-diameter pipe 3 around the coupling hole 3a of the large-diameter pipe 3. . Therefore, the leading insertion claw 14a corresponds to the flange portion corresponding to the axial direction of the large-diameter pipe 3 among the flange parts 11 seated around the coupling hole 3a of the large-diameter pipe 3. Forming. By forming the leading insertion claw 14a in this way, when the branch pipe 1 is inserted into the coupling hole 3a of the large diameter pipe 3, the leading insertion claw 14a is aligned with the longitudinal direction of the large diameter pipe 3. Therefore, it is only necessary to insert the branch pipe 1 (insertion tube portion 13), so that the alignment at the time of insertion becomes easy.
In the present embodiment, an indication 17 indicating the position of the preceding insertion claw 14a is provided on the surface of the flange portion 11 on the receiving cylinder portion 12 side. This marking 17 ensures alignment when inserting the branch pipe 1 into the coupling hole 3a. The marking 17 can also be provided at a position corresponding to the opposing claw 14b and the intermediate claw 14c.
The marking 17 may be anything that can be marked, in addition to the raised line, a groove, and the like.

前記先行差込用爪１４ａの位置を、大径管３の軸心方向に対応するフランジ部１１部分に対応する位置とした場合には、大径管３を立設状態（図２参照）に配管すると、それに取り付けられる支管１の先行差込用爪１４ａは大径管３の垂直方向の上位の位置に配置されることになり、また対向爪１４ｂは大径管３の垂直方向の下位の位置に配置されることになる。
爪の長い先行差込用爪１４ａが立設された大径管３の上位の位置にある場合には、接合された枝管２等に上からの土圧が加わる場合においても、先行差込用爪１４ａの係合量が大きいので、その分だけ係合が外れ難く、上からの圧力に耐えることができる。 When the position of the preceding insertion claw 14a is a position corresponding to the flange portion 11 corresponding to the axial direction of the large-diameter pipe 3, the large-diameter pipe 3 is set upright (see FIG. 2). When piped, the leading insertion claw 14a of the branch pipe 1 attached to the pipe 1 is arranged at a higher position in the vertical direction of the large diameter pipe 3, and the opposing claw 14b is arranged at a lower position in the vertical direction of the large diameter pipe 3. Will be placed in position.
When the claw 14a having a long claw is located at the upper position of the large-diameter pipe 3 provided upright, even when earth pressure from above is applied to the joined branch pipe 2 or the like, the advance insertion is performed. Since the engagement amount of the claw 14a is large, it is difficult to disengage by that much and it is possible to withstand the pressure from above.

図８を参照して、支管１を立設状態の大径管３の結合用穴３ａに結合する作業を説明する。
今、支管１の受入筒部１２を手で持ち、先行差込用爪１４ａが筒部１２に上側にくるようにする。そして支管１を少し斜め下方に傾けた状態で結合用穴３ａに差し入れていく。この場合、先行差込用爪１４ａの位置を示す標示１７を大径管３の軸心方向（大径管３の長手方向）に合わせながら差し込み、先ず先行差込用爪１４ａを結合用穴３ａの背面に係合する。そして更に、先行差込用爪１４ａの両側にある一対の突状ガイド１５が結合用穴３ａの内面に当接するように差し込む。前記突状ガイド１５を結合用穴３ａの内面に当接するようにすることで、差込筒部１３の結合用穴３ａに対するセンター出しがなされる。結合用穴３ａの内壁に接する前記一対の突状ガイド１５よってガイドされた状態で、更に支管１を押し込むことで、中間爪１４ｃ及び対向爪１４ｂが結合用穴３ａの内壁に接しながら強制的に、或いは僅かな隙間をもって、結合用穴３ａを越えて穴３ａの背面に係合する。このとき、前記突状ガイド１５の先端から支管１の軸心Ｘまでの径Ｒ４を、結合用穴３ａの半径Ｒよりも少し小さくしているので、支管１が結合用穴３ａに係合された後、少しだけ下方にズラすことが可能となる。このズレによって、対向爪１４ｂ、中間爪１４ｃの係合が安定し、結合用穴３ａから爪が外れ難くなる。先行差込用爪１４ａは係合長さが元々長いので、支管１が少しズレることがあっても係合が外れることはない。
前記支管１の結合用穴３ａ内でのズレは僅かであるので、引き続いて支管１は結合用穴３ａに差し込まれた状態で安定した結合が維持される。
粘着材１６を施している場合は、結合状態がその分だけ安定し、水密性も向上する。
勿論、粘着材１６を施していない場合においても、簡易な接続手段として、容易に、簡単に接続継手を構成して、枝管２を接合することが可能となる。 With reference to FIG. 8, the operation | work which couple | bonds the branch pipe 1 with the hole 3a for a coupling | bonding of the large diameter pipe 3 of the standing state is demonstrated.
Now, the receiving tube portion 12 of the branch pipe 1 is held by hand so that the leading insertion claw 14a is on the tube portion 12 at the upper side. Then, the branch pipe 1 is inserted into the coupling hole 3a while being slightly inclined downward. In this case, the indicator 17 indicating the position of the leading insertion claw 14a is inserted in alignment with the axial direction of the large diameter pipe 3 (longitudinal direction of the large diameter pipe 3), and the leading insertion claw 14a is first inserted into the coupling hole 3a. Engage with the back of the. Further, the pair of protruding guides 15 on both sides of the leading insertion claw 14a are inserted so as to contact the inner surface of the coupling hole 3a. The projecting guide 15 is brought into contact with the inner surface of the coupling hole 3a, whereby the insertion tube portion 13 is centered with respect to the coupling hole 3a. In the state guided by the pair of projecting guides 15 in contact with the inner wall of the coupling hole 3a, the intermediate claw 14c and the opposing claw 14b are forcibly brought into contact with the inner wall of the coupling hole 3a by further pushing the branch pipe 1. Or with a slight gap, it engages with the back surface of the hole 3a beyond the coupling hole 3a. At this time, since the diameter R4 from the tip of the projecting guide 15 to the axis X of the branch pipe 1 is slightly smaller than the radius R of the coupling hole 3a, the branch pipe 1 is engaged with the coupling hole 3a. After that, it is possible to shift it slightly downward. Due to this displacement, the engagement between the opposing claw 14b and the intermediate claw 14c is stabilized, and the claw is difficult to come off from the coupling hole 3a. Since the leading insertion claw 14a has an originally long engagement length, even if the branch pipe 1 is slightly shifted, the engagement is not released.
Since the displacement of the branch pipe 1 in the coupling hole 3a is slight, the stable coupling is maintained in the state where the branch pipe 1 is inserted into the coupling hole 3a.
In the case where the adhesive material 16 is applied, the bonding state is stabilized correspondingly and the water tightness is also improved.
Of course, even when the adhesive material 16 is not applied, as a simple connection means, it is possible to easily form a connection joint and join the branch pipes 2 easily.

なお先行差込用爪１４ａは、本実施形態では１つ設けたが、１つ以上を設けてもよい。
対向爪１４ｂも本実施形態では１つ設けたが、１つ以上を設けてもよい。
また中間爪１４ｃはなくても可能であるが、ないと支管１が結合用穴３ａから抜け易くなる。実施形態では一対を設けたが、２つ以上あってもよい。
突状ガイド１５は、本実施形態では２対を設けたが、突状ガイド１５の数は限定されない。 In addition, although one nail | claw 14a for advance insertion was provided in this embodiment, you may provide one or more.
Although one opposing claw 14b is provided in the present embodiment, one or more opposing claws 14b may be provided.
Further, although it is possible without the intermediate pawl 14c, the branch tube 1 is easily removed from the coupling hole 3a. In the embodiment, a pair is provided, but there may be two or more.
In the present embodiment, two pairs of protruding guides 15 are provided, but the number of protruding guides 15 is not limited.

本発明の実施形態に係る支管の使用状態を示す図である。It is a figure which shows the use condition of the branch pipe which concerns on embodiment of this invention. 本発明の支管を大径管に結合した状態を示す斜視図である。It is a perspective view which shows the state which couple | bonded the branch pipe of this invention with the large diameter pipe. 本実施形態に係る支管を受入筒部側から見た斜視図である。It is the perspective view which looked at the branch pipe which concerns on this embodiment from the receiving cylinder part side. 本実施形態に係る支管を差込筒部側から見た斜視図である。It is the perspective view which looked at the branch pipe which concerns on this embodiment from the insertion cylinder part side. 粘着材を施していない支管を差込筒部側から見た斜視図である。It is the perspective view which looked at the branch pipe which has not given the adhesive material from the insertion cylinder part side. 支管の底面図である。It is a bottom view of a branch pipe. 図６のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 支管の取り付け途中の状態を示す断面図である。It is sectional drawing which shows the state in the middle of attachment of a branch pipe.

Explanation of symbols

１支管
２枝管
３大径管
３ａ結合用穴
４管
１１フランジ部
１２受入筒部
１３差込筒部
１３ａ縮小段部
１４係合用爪
１４ａ先行差込用爪
１４ｂ対向爪
１４ｃ中間爪
１５突状ガイド
１６粘着材
１７標示
Ｌ１先行差込用爪の長さ
Ｌ２他の係合用爪の長さ
Ｍ枡
Ｒ結合用穴の半径
Ｒ１先行差込用爪の先端から支管の軸心までの径
Ｒ２対向爪の先端から支管の軸心までの径
Ｒ３中間爪の先端から支管の軸心までの径
Ｒ４突状ガイドの先端から支管の軸心までの径
Ｓ１先行差込用爪とフランジ部との間隙寸法
Ｓ２他の係合用爪とフランジ部との間隙寸法
Ｘ支管の軸心 DESCRIPTION OF SYMBOLS 1 Branch pipe 2 Branch pipe 3 Large diameter pipe 3a Coupling hole 4 Pipe 11 Flange part 12 Receiving cylinder part 13 Insertion cylinder part 13a Reduction | restoration step part 14 Engagement nail | claw 14a Advance insertion nail | claw 14b Opposing nail | claw 14c Intermediate | middle nail | claw 15 Projection shape Guide 16 Adhesive 17 Marking L1 Length of preceding insertion claw L2 Length of other engagement claw M 枡 R Radius of coupling hole R1 Diameter from tip of preceding insertion claw to shaft center of branch R2 Opposite Diameter from the tip of the claw to the axis of the branch pipe R3 Diameter from the tip of the intermediate claw to the axis of the branch pipe R4 Diameter from the tip of the protruding guide to the axis of the branch pipe S1 Clearance between the leading insertion claw and the flange Dimension S2 Dimension of gap between other engaging claw and flange X Shaft center

Claims

A branch pipe coupled to a coupling hole provided in a side wall of the large-diameter pipe for joining the branch pipe to the large-diameter pipe, and an insertion cylinder portion inserted into the coupling hole of the large-diameter pipe; A receiving cylinder part for receiving the branch pipe, and a flange part seated around the coupling hole,
The insertion tube portion includes a plurality of engaging claws that engage with the back surface of the connection hole when the insertion tube portion is inserted into the connection hole of the large-diameter tube, and an inner surface of the connection hole. With a plurality of protruding guides that guide the insertion of the branch pipe by abutting ,
At least one of the plurality of engaging claws is formed as a leading insertion claw in which the engagement length with the back surface of the coupling hole is longer than that of the other engaging claws,
At least one engagement claw is formed as a counter claw at a position facing the preceding insertion claw, and the diameter from the tip of the counter claw to the axis of the branch pipe is defined as the radius of the coupling hole of the large diameter pipe A branch pipe characterized by being substantially the same .

2. The branch pipe according to claim 1, wherein a diameter from the tip of the projecting guide to the axis of the branch pipe is slightly shorter than a radius of the coupling hole of the large diameter pipe.

Another engaging claw is formed as an intermediate claw between the preceding insertion claw and the opposing claw, and the diameter from the tip of the intermediate claw to the axis of the branch pipe is defined as the radius of the coupling hole of the large diameter pipe. The branch pipe according to claim 1 or 2, characterized by being substantially the same .

The branch pipe according to any one of claims 1 to 3 , wherein a leading insertion nail is formed corresponding to a flange portion corresponding to an axial direction of the large-diameter pipe.

The branch pipe according to claim 4 , wherein the branch pipe is coupled to a large-diameter pipe in a standing state .

The branch pipe according to any one of claims 1 to 5, wherein an adhesive material is applied to a seating surface of the flange portion .

The branch pipe according to any one of claims 1 to 6, wherein a gap dimension between the preceding insertion claw and the flange portion is larger than a gap dimension between the other engagement claw and the flange portion .