JP2022070700A

JP2022070700A - Pipe connector

Info

Publication number: JP2022070700A
Application number: JP2020179911A
Authority: JP
Inventors: 祐介北村; Yusuke Kitamura
Original assignee: Mirai Industry Co Ltd
Current assignee: Mirai Industry Co Ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2022-05-13
Anticipated expiration: 2040-10-27
Also published as: JP7483588B2

Abstract

To provide a pipe connector which can easily connect a connection adapter to an end part of a helical corrugated pipe.SOLUTION: A pipe connector 3 comprises a connection adapter 4 and a main body 5. The connection adapter 4 has a salient part 4a which intrudes into a spiral recess 2a of an outer face of a helical corrugated pipe 2 at an inner face, and is attached to an end part of the helical corrugated pipe 2 from one end 4b side while spirally turning. The connection adapter 4 has a plurality of vertically-split bodies 4e, 4e having split faces 4d extending in an axial core direction 4c, and an assembling part 4f for mutually assembling the split bodies 4e, 4e. The assembling part 4f is arranged in only a position which is shifted to a side opposite to one end 4b side, and the plurality of split bodies 4e, 4e become separable from each other at the other end 4g sides opposite to one end 4b side. The main body 5 has a connection part 5a, and the end part of the helical corrugated pipe 2 attached with the connection adapter 4 is inserted into the connection part 5a together with the connection adapter 4.SELECTED DRAWING: Figure 13

Description

この発明は、螺旋波付き管が接続される管接続具に関するものである。 The present invention relates to a tube connector to which a tube with a spiral wave is connected.

従来、ハンドホール等の地中箱の壁部に対し、螺旋波付き管を接続する管体接続部構造が知られていた（例えば、特許文献１参照）。図１９に示すように、この管体接続部構造２３は、壁部２１の貫通孔２１ａに挿入される受け継手２４と、受け継手２４を壁部２１に固定するための締め付け部材２５およびベルマウス２６と、螺旋波付き管２２に螺合させたのち受け継手２４に差し込まれる差込み継手２７と、差込み継手２７を抜け止めする抜け止め部材２８とを備えていた。 Conventionally, a pipe connection portion structure for connecting a pipe with a spiral wave to a wall portion of an underground box such as a hand hole has been known (see, for example, Patent Document 1). As shown in FIG. 19, the pipe connection portion structure 23 includes a receiving joint 24 inserted into the through hole 21a of the wall portion 21, a tightening member 25 for fixing the receiving joint 24 to the wall portion 21, and a bell mouth. 26, a plug-in joint 27 that is screwed into a pipe with a spiral wave 22 and then inserted into a receiving joint 24, and a retaining member 28 that prevents the plug-in joint 27 from coming off.

特開２００８－０１４４５５号公報Japanese Unexamined Patent Publication No. 2008-014455

しかし、前記従来の管体接続部構造２３においては、差込み継手２７（接続アダプター）を螺旋波付き管２２に螺合させる際に、螺旋波付き管２２に巻き癖が残っていると、差込み継手２７の内部で巻き癖を矯正しつつ螺進させる必要があったり、巻き癖で螺旋波付き管２２と差込み継手２７との摩擦が大きかったりして、螺旋波付き管２２への差込み継手２７の取付作業がやっかいであった。 However, in the conventional pipe body connection portion structure 23, when the insertion joint 27 (connection adapter) is screwed into the spiral wave pipe 22, if the spiral wave pipe 22 has a winding habit, the insertion joint It is necessary to screw while correcting the winding habit inside the 27, or the friction between the spiral wave tube 22 and the insertion joint 27 is large due to the winding habit, so that the insertion joint 27 to the spiral wave tube 22 The installation work was troublesome.

この発明は、上記した従来の欠点を解決するためになされたものであり、その目的とするところは、接続アダプターを螺旋波付き管の端部に容易に取り付けることができる、管接続具を提供することにある。 The present invention has been made to solve the above-mentioned conventional drawbacks, and an object thereof is to provide a tube fitting that allows a connection adapter to be easily attached to the end of a spiral wave tube. To do.

この発明に係る管接続具は、前記目的を達成するために、次の構成からなる。すなわち、
請求項１に記載の発明に係る管接続具は、螺旋波付き管が接続される管接続具であって、前記螺旋波付き管の端部を受け入れるように筒状に形成され、かつ、内面に前記螺旋波付き管の外面の螺旋状の凹部に入り込む突出部を有して、一端側から前記螺旋波付き管の端部に螺旋状に回動して取り付けられる、接続アダプターと、本体とを備える。前記本体は、前記接続アダプターが取り付けられた前記螺旋波付き管の端部が、前記接続アダプターとともに挿入される、筒状の接続部を有する。そして、前記接続部には、その接続部からの前記螺旋波付き管および前記接続アダプターの抜け出しを防止する、抜け出し防止部が設けられる。ここで、前記接続アダプターは、その軸心方向に延びる分断面を有する縦割り形状の複数の分割体と、それら分割体を相互に組み付ける組付け部とを有する。そして、前記組付け部は、前記一端側に片寄った位置にのみ設けられて、前記複数の分割体は、前記一端側とは反対の他端側が互いに離間可能となっている。 The pipe connector according to the present invention has the following configuration in order to achieve the above object. That is,
The pipe connecting tool according to the invention according to claim 1 is a pipe connecting tool to which a pipe with a spiral wave is connected, and is formed in a tubular shape so as to receive an end portion of the pipe with a spiral wave and has an inner surface. A connection adapter and a main body, which have a protrusion that enters into a spiral recess on the outer surface of the spiral wave tube, and are spirally attached to the end of the spiral wave tube from one end side. To prepare for. The body has a cylindrical connection into which the end of the spiral wave tube to which the connection adapter is attached is inserted together with the connection adapter. Then, the connection portion is provided with a disconnection prevention portion that prevents the spiral wave tube and the connection adapter from disconnecting from the connection portion. Here, the connection adapter has a plurality of vertically divided divided bodies having a partial cross section extending in the axial direction thereof, and an assembling portion for assembling the divided bodies to each other. The assembly portion is provided only at a position offset to one end side, and the plurality of divided bodies can be separated from each other on the other end side opposite to the one end side.

この管接続具によると、管接続具は、接続アダプターと、接続部を有する本体とを備えている。そこで、接続アダプターを、その一端側から螺旋波付き管の外周に嵌めるように、接続アダプターの内面の突出部を螺旋波付き管の外面の螺旋状の凹部に入れつつ、その接続アダプターを回動することで、接続アダプターが螺旋波付き管の端部に取り付けられる。そして、本体の接続部に、螺旋波付き管の端部を、接続アダプターとともに挿入すると、接続部に設けられた抜け出し防止部により、その接続部からの螺旋波付き管および接続アダプターの抜け出しが防止されて、螺旋波付き管は、接続部、ひいては管接続具に接続される。ここにおいて、接続アダプターは、縦割り形状の複数の分割体が、前記一端側に片寄った位置にある組付け部により相互に組み付けられて、他端側が互いに離間可能となっている。このため、接続アダプターを螺旋波付き管の端部に取り付ける際、螺旋波付き管に巻き癖があったりして、螺旋波付き管と接続アダプターとの摩擦が大きくても、複数の分割体が互いに離間することで、その摩擦を低減して、取り付けの抵抗を小さくすることができる。 According to this tube connector, the tube connector comprises a connection adapter and a body having a connection. Therefore, the connection adapter is rotated while inserting the protrusion on the inner surface of the connection adapter into the spiral concave portion on the outer surface of the spiral wave tube so that the connection adapter is fitted to the outer periphery of the spiral wave tube from one end side thereof. By doing so, the connection adapter is attached to the end of the spiral wave tube. Then, when the end of the spiral wave tube is inserted into the connection portion of the main body together with the connection adapter, the escape prevention portion provided in the connection portion prevents the spiral wave tube and the connection adapter from disconnecting from the connection portion. The spiral wave tube is connected to the connection part and thus to the pipe connection tool. Here, in the connection adapter, a plurality of vertically divided bodies are assembled to each other by an assembling portion located at a position offset to one end side, and the other end side can be separated from each other. For this reason, when attaching the connection adapter to the end of the spiral wave tube, even if the spiral wave tube has a winding habit and the friction between the spiral wave tube and the connection adapter is large, a plurality of divided bodies will be formed. By separating them from each other, the friction can be reduced and the mounting resistance can be reduced.

また、請求項２に記載の発明に係る管接続具は、請求項１に記載の管接続具において、前記複数の分割体には、互いに係合して前記軸心方向への相対移動を規制する移動規制部が設けられる。組付け部の他に移動規制部が設けられることで、組付け部の構造を簡単にすることができる。 Further, in the pipe connecting tool according to the second aspect of the present invention, in the pipe connecting tool according to the first aspect, the plurality of divided bodies are engaged with each other to restrict relative movement in the axial direction. A movement control unit is provided. By providing a movement control section in addition to the assembly section, the structure of the assembly section can be simplified.

また、請求項３に記載の発明に係る管接続具は、請求項２に記載の管接続具において、前記移動規制部は、前記分断面の、前記突出部の存する部分に設けられる。移動規制部が分断面に設けられることで、その移動規制部を互いの分割体で保護することができ、また、移動規制部が、分断面の、突出部の存する部分に設けられることで、その移動規制部を容易に形成することができる。 Further, in the pipe connecting tool according to the third aspect of the present invention, in the pipe connecting tool according to the second aspect, the movement restricting portion is provided in the portion of the partial cross section where the protruding portion is present. By providing the movement restricting portion on the divided cross section, the movement restricting portion can be protected by each other's split body, and by providing the movement restricting portion on the portion of the divided cross section where the protruding portion exists, the movement restricting portion can be provided. The movement control section can be easily formed.

また、請求項４に記載の発明に係る管接続具は、請求項１ないし３のいずれか１項に記載の管接続具において、前記接続アダプターと前記螺旋波付き管とに挟まれるように、前記接続アダプターの内面の前記他端側に片寄った位置に、内面側水膨潤性シートが設けられる。内面側水膨潤性シートが設けられることで、接続アダプター内面と螺旋波付き管外面との間の止水がなされる。そして、この内面側水膨潤性シートが、複数の分割体が互いに離間可能となる他端側に片寄った位置に設けられることで、接続アダプターを螺旋波付き管の端部に取り付ける際に、複数の分割体の他端側が互いに離間して、螺旋波付き管と内面側水膨潤性シートとの摩擦を低減し、取り付けの抵抗を小さくすることができる。 Further, the pipe connector according to the invention according to claim 4 is sandwiched between the connection adapter and the spiral wave tube in the pipe connector according to any one of claims 1 to 3. An inner surface side water swelling sheet is provided at a position offset to the other end side of the inner surface of the connection adapter. By providing the water swelling sheet on the inner surface side, water is stopped between the inner surface of the connection adapter and the outer surface of the pipe with a spiral wave. The water-swellable sheet on the inner surface side is provided at a position offset to the other end side where the plurality of divided bodies can be separated from each other, so that a plurality of connecting adapters can be attached to the end of the spiral wave tube. The other end side of the split body is separated from each other, the friction between the spiral wave tube and the water-swellable sheet on the inner surface side can be reduced, and the mounting resistance can be reduced.

また、請求項５に記載の発明に係る管接続具は、請求項１ないし４のいずれか１項に記載の管接続具において、前記接続アダプターと前記接続部とに挟まれるように、前記接続アダプターの外面に、外面側水膨潤性シートが設けられる。そして、前記外面側水膨潤性シートは、前記接続アダプターの周方向に伸張可能であって、少なくとも隣接する前記分割体に跨って設けられる。外面側水膨潤性シートが設けられることで、接続アダプター外面と接続部内面との間の止水がなされる。そして、この外面側水膨潤性シートが、隣接する分割体に跨って設けられ、伸張可能であることから、分割体の他端側の開きを許容するとともに、開き過ぎによる組付け部の破損を防止することができる。 Further, the pipe connector according to the invention according to claim 5 is the connection tool according to any one of claims 1 to 4 so as to be sandwiched between the connection adapter and the connection portion. A water-swellable sheet on the outer surface side is provided on the outer surface of the adapter. The water-swellable sheet on the outer surface side is expandable in the circumferential direction of the connection adapter and is provided so as to straddle at least the adjacent divided bodies. By providing the water swelling sheet on the outer surface side, water is stopped between the outer surface of the connection adapter and the inner surface of the connection portion. Since the water-swellable sheet on the outer surface side is provided across the adjacent split body and can be stretched, the other end side of the split body is allowed to open, and the assembled portion is damaged due to excessive opening. Can be prevented.

また、請求項６に記載の発明に係る管接続具は、請求項１ないし５のいずれか１項に記載の管接続具において、隣接する前記分割体に挟まれるように、互いに対向する前記分断面の少なくとも一方の面に、分断面間水膨潤性シートが設けられる。分断面間水膨潤性シートが設けられることで、隣接する分割体における分断面間の止水がなされる。 Further, the pipe connecting tool according to the invention according to claim 6 is the portion facing each other so as to be sandwiched between the adjacent divided bodies in the pipe connecting tool according to any one of claims 1 to 5. A water-swellable sheet between divisions is provided on at least one surface of the cross section. By providing the water swelling sheet between the sectional sections, the water is stopped between the sectional sections in the adjacent divided bodies.

この発明に係る管接続具によれば、複数の分割体が互いに離間することで、取り付けの抵抗を小さくして、接続アダプターを、螺旋波付き管の端部に容易に取り付けることができる。 According to the tube connector according to the present invention, the plurality of divided bodies are separated from each other, so that the resistance of attachment is reduced and the connection adapter can be easily attached to the end of the spiral wave tube.

この発明の一実施の形態の、縦断面図である。It is a vertical sectional view of one Embodiment of this invention. 同じく、正面図である。Similarly, it is a front view. 同じく、管接続具の分解斜視図である。Similarly, it is an exploded perspective view of a pipe connector. 同じく、接続アダプターを取り付けた螺旋波付き管を、本体の接続部に挿入する直前の状態を示す、縦断面図である。Similarly, it is a vertical sectional view showing a state immediately before inserting a tube with a spiral wave to which a connection adapter is attached into a connection portion of the main body. 同じく、接続アダプターの斜視図である。Similarly, it is a perspective view of the connection adapter. 同じく、接続アダプターを逆向きにした斜視図である。Similarly, it is a perspective view in which the connection adapter is turned upside down. 同じく、接続アダプターの正面図である。Similarly, it is a front view of the connection adapter. 同じく、接続アダプターの縦断面図である。Similarly, it is a vertical sectional view of the connection adapter. 同じく、図７におけるＡ－Ａ線による断面図である。Similarly, it is a cross-sectional view taken along the line AA in FIG. 同じく、図７におけるＢ－Ｂ線による断面図である。Similarly, it is a cross-sectional view taken along the line BB in FIG. 7. 同じく、接続アダプターの分解斜視図である。Similarly, it is an exploded perspective view of the connection adapter. 同じく、接続アダプターを逆向きにした分解斜視図である。Similarly, it is an exploded perspective view in which the connection adapter is turned upside down. 同じく、接続アダプターを螺旋波付き管に取り付けて、分割体が互いに離間しなかったときの図であって、（ａ）は、縦断面図、（ｂ）は、正面図である。Similarly, it is a figure when the connection adapter is attached to the tube with a spiral wave, and the divided bodies are not separated from each other, (a) is a vertical sectional view, (b) is a front view. 同じく、接続アダプターを螺旋波付き管に取り付ける過程において、分割体が互いに離間したときの図であって、（ａ）は、縦断面図、（ｂ）は、正面図である。Similarly, in the process of attaching the connection adapter to the tube with a spiral wave, it is a view when the divided bodies are separated from each other, (a) is a vertical sectional view, and (b) is a front view. この発明の他の実施の形態の、水膨潤性シート付の接続アダプターを示す、縦断面図である。FIG. 3 is a vertical cross-sectional view showing a connection adapter with a water swellable sheet according to another embodiment of the present invention. 同じく、正面図である。Similarly, it is a front view. 同じく、図１６におけるＣ－Ｃ線による断面図である。Similarly, it is a cross-sectional view taken along the line CC in FIG. 同じく、水膨潤性シート付きの接続アダプターを取り付けた螺旋波付き管を、本体の接続部に挿入した状態を示す、要部縦断面図である。Similarly, it is a vertical sectional view of a main part showing a state in which a tube with a spiral wave to which a connection adapter with a water-swellable sheet is attached is inserted into a connection portion of the main body. 従来の管体接続部構造を示す、上半分を破断した正面図である。It is a front view which shows the structure of the conventional pipe body connection part, and the upper half is cut.

以下、この発明に係る管接続具を実施するための形態を図面に基づいて説明する。 Hereinafter, a mode for carrying out the pipe connector according to the present invention will be described with reference to the drawings.

図１～図１４は、本発明の一実施の形態を示す。図中符号１は、地中埋設箱等の壁を示す。２は、周壁が螺旋状に波打って形成された螺旋波付き管を示す。３は、前記螺旋波付き管２が接続される管接続具を示す。 1 to 14 show an embodiment of the present invention. Reference numeral 1 in the figure indicates a wall of an underground box or the like. Reference numeral 2 shows a tube with a spiral wave formed by the peripheral wall waving in a spiral shape. Reference numeral 3 indicates a tube connector to which the spiral wave tube 2 is connected.

管接続具３は、接続アダプター４と本体５とを備える。接続アダプター４は、螺旋波付き管２の端部を受け入れるように筒状に形成され、かつ、内面に螺旋波付き管２の外面の螺旋状の凹部２ａに入り込む突出部４ａを有して、一端４ｂ側から螺旋波付き管２の端部に螺旋状に回動して取り付けられる。この接続アダプター４は、接続アダプター４の軸心方向４ｃに延びる分断面４ｄを有する縦割り形状の複数（図示実施の形態においては、二つ）の分割体４ｅ、４ｅと、それら分割体４ｅ、４ｅを相互に組み付ける組付け部４ｆとを有する。この組付け部４ｆは、前記一端４ｂ側に片寄った位置（すなわち、接続アダプター４の軸心方向４ｃにおける中心より一端４ｂ側にずれた位置、好ましくは、図示実施の形態に示されるように、一端４ｂの傍らの位置）にのみ設けられて、複数の分割体４ｅ、４ｅは、前記一端４ｂ側とは反対の他端４ｇ側が互いに離間可能となっている。そして、複数の分割体４ｅ、４ｅには、互いに係合して前記軸心方向４ｃへの相対移動を規制する移動規制部４ｈが設けられている。 The tube connector 3 includes a connection adapter 4 and a main body 5. The connection adapter 4 is formed in a cylindrical shape so as to receive the end portion of the spiral corrugated tube 2, and has a protruding portion 4a on the inner surface that penetrates into the spiral concave portion 2a on the outer surface of the spiral corrugated tube 2. It is spirally rotated and attached to the end of the spiral wave tube 2 from one end 4b side. The connection adapter 4 includes a plurality of vertically divided (two in the illustrated embodiment) divided bodies 4e and 4e having a partial cross section 4d extending in the axial direction 4c of the connecting adapter 4, and the divided bodies 4e. It has an assembly portion 4f for assembling 4e to each other. The assembly portion 4f is located at a position offset toward one end 4b (that is, at a position deviated toward one end 4b from the center in the axial direction 4c of the connection adapter 4, preferably as shown in the illustrated embodiment). The plurality of divided bodies 4e and 4e are provided only at the position beside one end 4b), and the other end 4g side opposite to the one end 4b side can be separated from each other. The plurality of divided bodies 4e and 4e are provided with a movement restricting unit 4h that engages with each other to regulate the relative movement in the axial direction 4c.

本体５は、接続部５ａを有し、その接続部５ａには、接続アダプター４が取り付けられた螺旋波付き管２の端部が、接続アダプター４とともに挿入される。そして、接続部５ａには、その接続部５ａからの螺旋波付き管２および接続アダプター４の抜け出しを防止する、抜け出し防止部５ｂが設けられている。 The main body 5 has a connection portion 5a, and the end portion of the spiral wave tube 2 to which the connection adapter 4 is attached is inserted into the connection portion 5a together with the connection adapter 4. The connection portion 5a is provided with a disconnection prevention portion 5b that prevents the spiral wave tube 2 and the connection adapter 4 from disconnecting from the connection portion 5a.

具体的には、螺旋波付き管２は、例えば保護管であって、その保護管内に、電気ケーブル等の線材とか、通水管等の管材とかが通される。 Specifically, the pipe 2 with a spiral wave is, for example, a protective pipe through which a wire rod such as an electric cable or a pipe material such as a water pipe is passed.

本体５は、接続具本体６と、ナット部材７と、前記接続部５ａを有する接続体８と、前記抜け出し防止部５ｂを有する抜け出し防止体９とを備える。さらに、本体５は、止水部材としての第１および第２パッキン１０、１１を備える。 The main body 5 includes a connector main body 6, a nut member 7, a connecting body 8 having the connecting portion 5a, and a pull-out preventing body 9 having the slip-out preventing portion 5b. Further, the main body 5 includes first and second packings 10 and 11 as water blocking members.

接続具本体６は、筒状に形成され、先端に、外方に突出する鍔部６ａが設けられている。そして、接続具本体６の外面には、雄ねじ６ｂが形成されている。 The connector main body 6 is formed in a cylindrical shape, and a flange portion 6a projecting outward is provided at the tip thereof. A male screw 6b is formed on the outer surface of the connector body 6.

接続体８は、第１筒部８ａと、その第１筒部８ａの内側に間隔をあけて設けられた第２筒部８ｂと、それら第１筒部８ａと第２筒部８ｂとを後端で繋ぐ繋ぎ部８ｃと、筒状の前記接続部５ａとを備える。そこで、接続部５ａは、前記第１筒部８ａから後方に延びており、その接続部５ａの底部分に、前記繋ぎ部８ｃが設けられる。また、第１筒部８ａの内面には、雌ねじ８ｄが形成され、その雌ねじ８ｄが接続具本体６の雄ねじ６ｂと螺合することで、接続体８は、接続具本体６（詳しくは、接続具本体６の後端部分）に取り付けられる。また、接続部５ａには、その内面に、抜け出し防止体９を収容する収容凹部８ｅが設けられている。 The connecting body 8 has a first cylinder portion 8a, a second cylinder portion 8b provided inside the first cylinder portion 8a at intervals, and the first cylinder portion 8a and the second cylinder portion 8b. A connecting portion 8c connected at an end and the tubular connecting portion 5a are provided. Therefore, the connecting portion 5a extends rearward from the first cylinder portion 8a, and the connecting portion 8c is provided at the bottom portion of the connecting portion 5a. Further, a female screw 8d is formed on the inner surface of the first cylinder portion 8a, and the female screw 8d is screwed with the male screw 6b of the connector main body 6, so that the connector 8 can be connected to the connector main body 6 (specifically, the connection). It is attached to the rear end portion of the tool body 6). Further, the connecting portion 5a is provided with an accommodating recess 8e for accommodating the escape prevention body 9 on the inner surface thereof.

抜け出し防止体９は、抜け出し防止部５ｂとしての係止部９ａを有し、その係止部９ａが接続アダプター４（詳しくは、後述する被係止部４ｉ）を係止することで、係止部９ａ（抜け出し防止部５ｂ）は、接続部５ａからの螺旋波付き管２および接続アダプター４の抜け出しを防止することとなる。詳細には、抜け出し防止体９は、リング状に形成されて周方向の一カ所で分断されたリング部９ｂと、前記係止部９ａとを有する。詳細には、係止部９ａは、リング部９ｂの周方向に並ぶようにして複数設けられる。係止部９ａは、リング部９ｂから延びて折り返されるように湾曲して形成され、その係止部９ａの先端に、被係止部４ｉに掛かる爪９ｃが設けられる。 The slip-out prevention body 9 has a locking portion 9a as a slip-out prevention portion 5b, and the locking portion 9a locks the connection adapter 4 (specifically, the locked portion 4i described later). The portion 9a (slip-out prevention portion 5b) prevents the pipe with spiral wave 2 and the connection adapter 4 from coming out from the connection portion 5a. Specifically, the escape prevention body 9 has a ring portion 9b formed in a ring shape and divided at one position in the circumferential direction, and the locking portion 9a. Specifically, a plurality of locking portions 9a are provided so as to be arranged in the circumferential direction of the ring portions 9b. The locking portion 9a is formed so as to extend from the ring portion 9b and be curved so as to be folded back, and a claw 9c that hangs on the locked portion 4i is provided at the tip of the locking portion 9a.

第１パッキン１０と第２パッキン１１とは、リング状に形成され、接続具本体６の外周に嵌められる。そして、第１パッキン１０は、接続具本体６の鍔部６ａと壁１との間にあり、第２パッキン１１は、ナット部材７と壁１との間にあって、それら第１および第２パッキン１０、１１を介して、鍔部６ａとナット部材７とで壁１を挟み込むことで、接続具本体６、ひいては本体５は、壁１に取り付けられる。なお、図中符号１ａは、壁１にあけられた貫通孔であって、接続具本体６は、その貫通孔１ａに挿入される。 The first packing 10 and the second packing 11 are formed in a ring shape and are fitted on the outer periphery of the connector main body 6. The first packing 10 is located between the flange portion 6a of the fitting main body 6 and the wall 1, and the second packing 11 is located between the nut member 7 and the wall 1, and the first and second packings 10 are located between the nut member 7 and the wall 1. By sandwiching the wall 1 between the flange portion 6a and the nut member 7 via the above 11, the connector main body 6 and the main body 5 are attached to the wall 1. In the figure, reference numeral 1a is a through hole formed in the wall 1, and the connector main body 6 is inserted into the through hole 1a.

接続アダプター４は、前述したように、筒状に形成されるが、その外面から突出するようにして、被係止部４ｉが設けられる。接続アダプター４の前記突出部４ａは、螺旋状に形成され、螺旋波付き管２の外面の螺旋に螺合する雌ねじとなっている。また、接続アダプター４には、前記他端４ｇ側の端部に、内側に突出（詳しくは、環状に突出）して螺旋波付き管２の先端に当接可能な内側リブ４ｊが設けられている。そこで、この内側リブ４ｊにより、接続アダプター４内への螺旋波付き管２の進入が制限されて。螺旋波付き管２の先端は、接続アダプター４内に留まることになる。そして、この内側リブ４ｊの先端は、フラットではなく、丸みを有している。 As described above, the connection adapter 4 is formed in a cylindrical shape, but the locked portion 4i is provided so as to project from the outer surface thereof. The protrusion 4a of the connection adapter 4 is formed in a spiral shape and is a female screw screwed into a spiral on the outer surface of the spiral wave tube 2. Further, the connection adapter 4 is provided with an inner rib 4j that protrudes inward (specifically, protrudes in an annular shape) and can come into contact with the tip of the spiral wave tube 2 at the end on the other end 4g side. There is. Therefore, the inner rib 4j restricts the entry of the spiral wave tube 2 into the connection adapter 4. The tip of the spiral wave tube 2 stays in the connection adapter 4. The tip of the inner rib 4j is not flat but rounded.

この接続アダプター４は、筒を縦に半割にした（つまり、均等に分割した）二つの分割体４ｅ、４ｅからなる（図１１、図１２参照）。前記組付け部４ｆは、一方の分割体４ｅに設けられた被係合部４ｋと、もう一方の分割体４ｅに設けられた係合部４ｍとからなり、係合部４ｍが被係合部４ｋに係合することで、組付け部４ｆ（つまり、被係合部４ｋと係合部４ｍ）がある接続アダプター４の一端４ｂ側において、二つの分割体４ｅ、４ｅは、互いの離間が抑えられ、対する他端４ｇ側が、互いに離間可能となる。詳細には、組付け部４ｆは、接続アダプター４の外側に設けられ、被係合部４ｋと係合部４ｍとは、分断面４ｄ付近にあって、分割体４ｅの外面から突出して形成される。より詳細には、図６および図１０～図１２に示すように、被係合部４ｋは、分断面４ｄを越えるように周方向に突出する凸部４ｎを有する。そして、係合部４ｍは、分断面４ｄから控えた位置から突出して分断面４ｄを越えるように周方向に延びており、分断面４ｄから控えた係合部４ｍの内側が、凹部４ｐとなっている。そして、係合部４ｍは、その延びた先端に内側を向く掛け部４ｑを有する。そこで、互いの分割体４ｅ、４ｅの組み付けにあたっては、係合部４ｍで被係合部４ｋを覆うようにして、凹部４ｐと凸部４ｎとを嵌合し、掛け部４ｑを、被係合部４ｋの凸部４ｎとは反対側の端面に掛ける。 The connection adapter 4 is composed of two divided bodies 4e and 4e in which the cylinder is vertically divided in half (that is, evenly divided) (see FIGS. 11 and 12). The assembled portion 4f is composed of an engaged portion 4k provided on one split body 4e and an engaging portion 4m provided on the other split body 4e, and the engaged portion 4m is an engaged portion. By engaging with 4k, the two divided bodies 4e and 4e are separated from each other on the one end 4b side of the connection adapter 4 having the assembled portion 4f (that is, the engaged portion 4k and the engaging portion 4m). It is suppressed and the other end 4g side can be separated from each other. Specifically, the assembly portion 4f is provided on the outside of the connection adapter 4, and the engaged portion 4k and the engaging portion 4m are formed in the vicinity of the sectional cross section 4d and projecting from the outer surface of the divided body 4e. To. More specifically, as shown in FIGS. 6 and 10 to 12, the engaged portion 4k has a convex portion 4n protruding in the circumferential direction so as to exceed the sectional cross section 4d. The engaging portion 4m protrudes from the position reserved from the sectional cross section 4d and extends in the circumferential direction so as to exceed the sectional cross section 4d, and the inside of the engaging portion 4m reserved from the sectional cross section 4d becomes a recess 4p. ing. The engaging portion 4m has a hanging portion 4q facing inward at the extended tip thereof. Therefore, when assembling the divided bodies 4e and 4e to each other, the concave portion 4p and the convex portion 4n are fitted so that the engaged portion 4k is covered with the engaging portion 4m, and the hanging portion 4q is engaged. It is hung on the end face of the portion 4k opposite to the convex portion 4n.

また、接続アダプター４の前記移動規制部４ｈとして、一側の分割体４ｅに、第１移動規制部４ｒが設けられ、他側の分割体４ｅに、第２移動規制部４ｓが設けられる。そして、移動規制部４ｈ、つまり第１移動規制部４ｒと第２移動規制部４ｓは、分断面４ｄの、前記突出部４ａの存する部分に設けられる。詳細には、第１移動規制部４ｒは、穴からなり、第２移動規制部４ｓは、その穴に嵌まる突起からなる。 Further, as the movement restricting unit 4h of the connection adapter 4, the first movement restricting unit 4r is provided on the divided body 4e on one side, and the second movement restricting unit 4s is provided on the divided body 4e on the other side. Then, the movement restricting unit 4h, that is, the first movement restricting unit 4r and the second movement restricting unit 4s are provided in the portion of the divided cross section 4d where the protruding portion 4a exists. Specifically, the first movement restricting portion 4r is composed of a hole, and the second movement restricting portion 4s is composed of a protrusion that fits into the hole.

次に、以上の構成からなる管接続具３の作用効果について説明する。この管接続具３によると、管接続具３は、接続アダプター４と、接続部５ａを有する本体５とを備えている。そこで、接続アダプター４を、その一端４ｂ側から螺旋波付き管２の外周に嵌めるように、接続アダプター４の内面の突出部４ａを螺旋波付き管２の外面の螺旋状の凹部２ａに入れつつ、その接続アダプター４を回動することで、接続アダプター４が螺旋波付き管２の端部に取り付けられる。そして、本体５の接続部５ａに、螺旋波付き管２の端部を、接続アダプター４とともに挿入すると、接続部５ａに設けられた抜け出し防止部５ｂにより、その接続部５ａからの螺旋波付き管２および接続アダプター４の抜け出しが防止されて、螺旋波付き管２は、接続部５ａ、ひいては管接続具３に接続される。 Next, the operation and effect of the pipe connector 3 having the above configuration will be described. According to the tube connector 3, the tube connector 3 includes a connection adapter 4 and a main body 5 having a connection portion 5a. Therefore, while inserting the protrusion 4a on the inner surface of the connection adapter 4 into the spiral recess 2a on the outer surface of the spiral wave tube 2 so that the connection adapter 4 is fitted to the outer periphery of the spiral wave tube 2 from one end 4b side thereof. By rotating the connection adapter 4, the connection adapter 4 is attached to the end of the spiral wave tube 2. Then, when the end portion of the spiral wave tube 2 is inserted into the connection portion 5a of the main body 5 together with the connection adapter 4, the escape prevention portion 5b provided in the connection portion 5a causes the spiral wave tube tube from the connection portion 5a. 2 and the connection adapter 4 are prevented from coming off, and the spiral wave tube 2 is connected to the connection portion 5a and thus to the tube connector 3.

ここにおいて、接続アダプター４は、縦割り形状の複数の分割体４ｅ、４ｅが、前記一端４ｂ側に片寄った位置にある組付け部４ｆにより相互に組み付けられて、他端４ｇ側が互いに離間可能となっている。このため、接続アダプター４を螺旋波付き管２の端部に取り付ける際、螺旋波付き管２に巻き癖があったりして、螺旋波付き管２と接続アダプター４との摩擦が大きくても、複数の分割体４ｅ、４ｅ（詳しくは、複数の分割体４ｅ、４ｅの前記他端４ｇ側）が互いに離間することで、その摩擦を低減して、取り付けの抵抗を小さくすることができる（図１４参照）。すなわち、この管接続具３によれば、複数の分割体４ｅ、４ｅ（詳しくは、複数の分割体４ｅ、４ｅの前記他端４ｇ側）が互いに離間することで、取り付けの抵抗を小さくして、接続アダプター４を、螺旋波付き管２の端部に容易に取り付けることができる。 Here, in the connection adapter 4, a plurality of vertically divided divided bodies 4e and 4e are assembled to each other by an assembling portion 4f located at a position offset to the one end 4b side, and the other end 4g side can be separated from each other. It has become. Therefore, when the connection adapter 4 is attached to the end of the spiral wave tube 2, even if the spiral wave tube 2 has a winding habit and the friction between the spiral wave tube 2 and the connection adapter 4 is large, By separating the plurality of divided bodies 4e and 4e (specifically, the other end 4g side of the plurality of divided bodies 4e and 4e) from each other, the friction thereof can be reduced and the mounting resistance can be reduced (FIG. FIG. 14). That is, according to the tube connector 3, the plurality of divided bodies 4e and 4e (specifically, the other end 4 g side of the plurality of divided bodies 4e and 4e) are separated from each other to reduce the mounting resistance. , The connection adapter 4 can be easily attached to the end of the spiral wave tube 2.

また、図示実施の形態においては、本体５は、接続具本体６とナット部材７とを備えている。そこで、接続具本体６の鍔部６ａとナット部材７とで壁１を挟み込むことで、本体５は、壁１に取り付けられる（図４参照）。すなわち、予め、本体５を壁１に取り付けておき、その後に、前述したように、本体５の接続部５ａに対し、接続アダプター４が取り付けられた螺旋波付き管２を接続することで、その螺旋波付き管２を、接続対象となる壁１に接続することができる（図４、図１参照）。 Further, in the illustrated embodiment, the main body 5 includes a connector main body 6 and a nut member 7. Therefore, the main body 5 is attached to the wall 1 by sandwiching the wall 1 between the flange portion 6a of the connector main body 6 and the nut member 7 (see FIG. 4). That is, the main body 5 is attached to the wall 1 in advance, and then, as described above, the spiral wave tube 2 to which the connection adapter 4 is attached is connected to the connection portion 5a of the main body 5. The spiral wave tube 2 can be connected to the wall 1 to be connected (see FIGS. 4 and 1).

また、接続アダプター４には、組付け部４ｆの他に、軸心方向４ｃへの分割体４ｅ、４ｅの相対移動を規制する移動規制部４ｈが設けられている。このため、組付け部４ｆからこの移動規制部４ｈの機能を省略することができ、組付け部４ｆの構造を簡単にすることができる。さらに、移動規制部４ｈが分断面４ｄに設けられることで、その移動規制部４ｈを互いの分割体４ｅで保護することができ、また、移動規制部４ｈが、分断面４ｄの、突出部４ａの存する部分に設けられることで、その移動規制部４ｈは、容易に形成される。 Further, the connection adapter 4 is provided with a movement restricting portion 4h that regulates the relative movement of the divided bodies 4e and 4e in the axial direction 4c, in addition to the assembling portion 4f. Therefore, the function of the movement restricting unit 4h can be omitted from the assembling unit 4f, and the structure of the assembling unit 4f can be simplified. Further, since the movement restricting portion 4h is provided on the sectional cross section 4d, the movement restricting portion 4h can be protected by each other's divided bodies 4e, and the movement restricting portion 4h has a protruding portion 4a having a sectional cross section 4d. The movement restricting portion 4h is easily formed by being provided in the existing portion.

なお、本発明は、上述した実施の形態に限定されるわけではなく、その他種々の変更が可能である。例えば、抜け出し防止部５ｂは、接続アダプター４を係止することで、接続部５ａからの螺旋波付き管２および接続アダプター４の抜け出しを防止するが、その他に、抜け出し防止部５ｂが、螺旋波付き管２（詳しくは、螺旋波付き管２の外面の螺旋部）を係止することで、接続部５ａからの螺旋波付き管２および接続アダプター４の抜け出しを防止するようにしてもよい。 The present invention is not limited to the above-described embodiment, and various other modifications can be made. For example, the escape prevention unit 5b prevents the pipe 2 with a spiral wave and the connection adapter 4 from coming out from the connection portion 5a by locking the connection adapter 4, but the escape prevention unit 5b also prevents the connection adapter 4 from coming out. By locking the attached tube 2 (specifically, the spiral portion on the outer surface of the spiral wave-attached tube 2), the spiral wave-attached tube 2 and the connection adapter 4 may be prevented from coming off from the connection portion 5a.

また、接続アダプター４は、三つ以上の分割体４ｅ、４ｅから構成されてもよい。 Further, the connection adapter 4 may be composed of three or more divided bodies 4e and 4e.

また、図１５～図１８に示すように、接続アダプター４には、内面側水膨潤性シート１２が設けられたり、外面側水膨潤性シート１３が設けられたり、分断面間水膨潤性シート１４が設けられてもよい。ここで、水膨潤性シート１２、１３、１４とは、水を吸って膨張する性質を有するシートであって、例えば、不織布によって形成される。 Further, as shown in FIGS. 15 to 18, the connection adapter 4 is provided with the water swellable sheet 12 on the inner surface side, the water swellable sheet 13 on the outer surface side, and the water swellable sheet 14 between the sectional cross sections. May be provided. Here, the water-swellable sheets 12, 13 and 14 are sheets having a property of absorbing water and expanding, and are formed of, for example, a non-woven fabric.

内面側水膨潤性シート１２は、接続アダプター４と螺旋波付き管２とに挟まれるように、接続アダプター４の内面に設けられ、詳細には、接続アダプター４の内面の前記他端４ｇ側に片寄った位置（すなわち、接続アダプター４の軸心方向４ｃにおける中心より他端４ｇ側にずれた位置）に設けられる。外面側水膨潤性シート１３は、接続アダプター４と接続部５ａとに挟まれるように、接続アダプター４の外面に設けられる。この外面側水膨潤性シート１３は、接続アダプター４の周方向に伸張可能であって、少なくとも隣接する分割体４ｅ、４ｅに跨って設けられる。そして、分断面間水膨潤性シート１４は、隣接する分割体４ｅ、４ｅに挟まれるように、互いに対向する分断面４ｄ、４ｄの少なくとも一方の面（図示実施の形態においては、両方の面）に設けられる。 The water-swellable sheet 12 on the inner surface side is provided on the inner surface of the connection adapter 4 so as to be sandwiched between the connection adapter 4 and the spiral wave tube 2, and more specifically, on the other end 4g side of the inner surface of the connection adapter 4. It is provided at an offset position (that is, a position shifted to the other end 4g side from the center in the axial center direction 4c of the connection adapter 4). The water-swellable sheet 13 on the outer surface side is provided on the outer surface of the connection adapter 4 so as to be sandwiched between the connection adapter 4 and the connection portion 5a. The outer surface side water swellable sheet 13 is expandable in the circumferential direction of the connection adapter 4 and is provided so as to straddle at least the adjacent divided bodies 4e and 4e. Then, the water-swellable sheet 14 between the sectional sections is sandwiched between the adjacent divided bodies 4e and 4e, and at least one surface of the sectional sections 4d and 4d facing each other (in the illustrated embodiment, both surfaces). It is provided in.

詳細には、内面側水膨潤性シート１２は、各分割体４ｅに設けられる。より詳細には、内面側水膨潤性シート１２は、内周全長に渡って分割体４ｅを覆い、加えて、分断面間水膨潤性シート１４を兼ねるように、両端部分が折れ曲がって分断面４ｄを覆い、さらに、両端が分割体４ｅの外面側に折り返されている。外面側水膨潤性シート１３は、接続アダプター４の外周全長に渡って設けられる。この外面側水膨潤性シート１３は、接続アダプター４の外面の前記他端４ｇ側に設けられる。そして、各水膨潤性シート１２、１３、１４は、分割体４ｅ（接続アダプター４）に、接着されたり熱溶着されたりして、貼り付けられる。 Specifically, the inner surface side water swellable sheet 12 is provided in each divided body 4e. More specifically, the water-swellable sheet 12 on the inner surface side covers the divided body 4e over the entire inner circumference, and in addition, both ends are bent so as to also serve as the water-swellable sheet 14 between the divided sections, and the divided section 4d. Is covered, and both ends are folded back toward the outer surface side of the divided body 4e. The water swellable sheet 13 on the outer surface side is provided over the entire outer circumference of the connection adapter 4. The outer surface side water swellable sheet 13 is provided on the other end 4g side of the outer surface of the connection adapter 4. Then, the water-swellable sheets 12, 13 and 14 are adhered to the divided body 4e (connection adapter 4) by being adhered or heat-welded.

もっとも、内面側水膨潤性シート１２が、分断面間水膨潤性シート１４を兼ねなくても、内面側水膨潤性シート１２と分断面間水膨潤性シート１４とが別個に設けられてもよい。また、外面側水膨潤性シート１３は、必ずしも接続アダプター４の外周全長に渡って設けられる必要はない。また、分断面間水膨潤性シート１４は、互いに対向する分断面４ｄ、４ｄの両方の面に設けられなくても、片方の面にのみ設けられてもよい。 However, even if the inner surface side water swelling sheet 12 does not also serve as the intersection water swelling sheet 14, the inner surface side water swelling sheet 12 and the intersection section water swelling sheet 14 may be provided separately. .. Further, the water swellable sheet 13 on the outer surface side does not necessarily have to be provided over the entire outer circumference of the connection adapter 4. Further, the water-swellable sheet 14 between the sectional sections may not be provided on both surfaces of the sectional sections 4d and 4d facing each other, or may be provided on only one surface.

内面側水膨潤性シート１２が設けられることで、接続アダプター４内面と螺旋波付き管２外面との間の止水がなされる。そして、この内面側水膨潤性シート１２が、複数の分割体４ｅ、４ｅが互いに離間可能となる他端４ｇ側に片寄った位置に設けられることで、接続アダプター４を螺旋波付き管２の端部に取り付ける際に、複数の分割体４ｅ、４ｅの他端４ｇ側が互いに離間して、螺旋波付き管２と内面側水膨潤性シート１２との摩擦を低減し、取り付けの抵抗を小さくすることができる。すなわち、従来の管体接続部構造において、差込み継手の内面に止水のための不織布を設けると、その不織布をしっかりと螺旋波付き管の外面に密着するように、螺旋波付き管が不織布を圧縮するようにしながら、差込み継手を螺進させるため、摩擦が非常に大きく、取付作業が大変やっかいとなる虞があった。そこで、複数の分割体４ｅ、４ｅの他端４ｇ側が互いに離間することで、取り付けの抵抗を小さくすることができ、取付作業を容易に行うことができる。 By providing the water swelling sheet 12 on the inner surface side, water is stopped between the inner surface of the connection adapter 4 and the outer surface of the spiral wave tube 2. Then, the water swellable sheet 12 on the inner surface side is provided at a position offset to the other end 4g side where the plurality of divided bodies 4e and 4e can be separated from each other, so that the connection adapter 4 can be connected to the end of the spiral wave tube 2. When attaching to the portion, the other ends 4g sides of the plurality of divided bodies 4e and 4e are separated from each other to reduce the friction between the spiral wave tube 2 and the water-swellable sheet 12 on the inner surface side, and reduce the attachment resistance. Can be done. That is, in the conventional pipe connection part structure, when a non-woven fabric for stopping water is provided on the inner surface of the insertion joint, the spiral corrugated pipe makes the non-woven fabric firmly adhere to the outer surface of the spiral corrugated pipe. Since the plug-in joint is screwed while being compressed, the friction is very large, and there is a risk that the mounting work will be very troublesome. Therefore, by separating the other end 4g sides of the plurality of divided bodies 4e and 4e from each other, the resistance of mounting can be reduced and the mounting work can be easily performed.

また、この内面側水膨潤性シート１２は、接続アダプター４において組付け部４ｆが設けられた箇所よりも前記他端４ｇ側の内面に設けられている。このため、接続アダプター４における内部空間の大きさの変動がほとんどない組付け部４ｆの箇所の内側に、内面側水膨潤性シート１２が存在せず、これによっても、螺旋波付き管２への接続アダプター４の取り付けの抵抗を小さくすることができ、取付作業を容易に行うことができる。 Further, the water swellable sheet 12 on the inner surface side is provided on the inner surface on the other end 4g side of the connection adapter 4 where the assembly portion 4f is provided. Therefore, the water-swellable sheet 12 on the inner surface side does not exist inside the assembly portion 4f where the size of the internal space of the connection adapter 4 hardly fluctuates, and this also causes the tube 2 with a spiral wave to be connected. The resistance of mounting the connection adapter 4 can be reduced, and the mounting work can be easily performed.

また、外面側水膨潤性シート１３が設けられることで、接続アダプター４外面と接続部５ａ内面との間の止水がなされる。そして、この外面側水膨潤性シート１３が、隣接する分割体４ｅ、４ｅに跨って設けられ、伸張可能であることから、分割体４ｅ、４ｅの他端４ｇ側の開きを許容するとともに、開き過ぎによる組付け部４ｆの破損を防止することができる。 Further, by providing the water swelling sheet 13 on the outer surface side, water is stopped between the outer surface of the connection adapter 4 and the inner surface of the connection portion 5a. Since the water-swellable sheet 13 on the outer surface side is provided across the adjacent divided bodies 4e and 4e and is expandable, the opening of the other end 4g side of the divided bodies 4e and 4e is allowed and opened. It is possible to prevent the assembly portion 4f from being damaged due to passing.

また、分断面間水膨潤性シート１４が設けられることで、隣接する分割体４ｅ、４ｅにおける分断面４ｄ、４ｄ間の止水がなされる。 Further, by providing the water swelling sheet 14 between the dividing sections, the water is stopped between the dividing sections 4d and 4d in the adjacent divided bodies 4e and 4e.

２螺旋波付き管
２ａ凹部
３管接続具
４接続アダプター
４ａ突出部
４ｂ一端
４ｃ軸心方向
４ｄ分断面
４ｅ分割体
４ｆ組付け部
４ｇ他端
４ｈ移動規制部
５本体
５ａ接続部
５ｂ抜け出し防止部
１２内面側水膨潤性シート
１３外面側水膨潤性シート
１４分断面間水膨潤性シート 2 Spiral wave tube 2a Concave 3 Tube connector 4 Connection adapter 4a Protruding part 4b One end 4c Axial center direction 4d Cross section 4e Divided body 4f Assembly part 4g Other end 4h Movement control part 5 Main body 5a Connection part 5b Lockout prevention part 12 Inner surface side water swelling sheet 13 Outer surface side water swelling sheet 14 minutes Intersection water swelling sheet

Claims

It is a pipe connector to which a pipe with a spiral wave is connected.
It is formed in a cylindrical shape so as to receive the end of the spiral wave tube, and has a protruding portion on the inner surface that enters the spiral recess on the outer surface of the spiral wave tube, and has the spiral wave from one end side. It is equipped with a connection adapter and a main body that can be spirally attached to the end of the tube.
The body has a cylindrical connection into which the end of the spiral wave tube to which the connection adapter is attached is inserted together with the connection adapter.
The connection portion is provided with a disconnection prevention portion that prevents the spiral wave tube and the connection adapter from disconnecting from the connection portion.
The connection adapter has a plurality of vertically divided bodies having a cross section extending in the axial direction thereof, and an assembling portion for assembling the divided bodies to each other.
The assembly portion is provided only at a position offset to one end side, and the plurality of divided bodies are capable of separating the other end side opposite to the one end side from each other.

The pipe connector according to claim 1, wherein the plurality of divided bodies are provided with a movement restricting unit that engages with each other to regulate relative movement in the axial direction.

The pipe connecting tool according to claim 2, wherein the movement restricting portion is provided in a portion of the divided cross section where the protruding portion is present.

Any one of claims 1 to 3, wherein a water-swellable sheet on the inner surface side is provided at a position offset to the other end side of the inner surface of the connection adapter so as to be sandwiched between the connection adapter and the tube with a spiral wave. The pipe connector according to item 1.

A water-swellable sheet on the outer surface side is provided on the outer surface of the connection adapter so as to be sandwiched between the connection adapter and the connection portion.
The pipe connecting tool according to any one of claims 1 to 4, wherein the water-swellable sheet on the outer surface side is expandable in the circumferential direction of the connecting adapter and is provided at least across the adjacent divided bodies. ..

The pipe connection according to any one of claims 1 to 5, wherein a water-swellable sheet between the cross sections is provided on at least one surface of the cross sections facing each other so as to be sandwiched between the adjacent divided bodies. Ingredients.