JP2014181740A - Different diameter hose coupling - Google Patents

Different diameter hose coupling Download PDF

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JP2014181740A
JP2014181740A JP2013056040A JP2013056040A JP2014181740A JP 2014181740 A JP2014181740 A JP 2014181740A JP 2013056040 A JP2013056040 A JP 2013056040A JP 2013056040 A JP2013056040 A JP 2013056040A JP 2014181740 A JP2014181740 A JP 2014181740A
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hose
fixing portion
different diameter
joint
end opening
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JP6077348B2 (en
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Yasuhide Sato
泰英 佐藤
Yasuyuki Mikami
康之 三上
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Tosetz Co Ltd
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Tosetz Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a different diameter hose coupling capable of connecting different diameter hoses to each other by the small number of component elements while preventing dew condensation effectively.SOLUTION: This invention relates to a different diameter hose coupling 10 for use in connecting two or more hoses of different diameters that comprises a hollow part and two end openings (the first end opening 1a and the second end opening 1b) communicated with the hollow part. The coupling comprises a first fixing part 2 and a second fixing part 3 to which each of the end parts of the first hose H1 and the second hose H2 of different diameters that are inserted from the first end opening 1a into the hollow part, and the third fixing part 5 to which the end part of the third hose H3 inserted from the second end opening 1b into the hollow part is fixed is set at a position different from the first fixing part 2 and the second fixing part 3.

Description

本発明は、異なる径のホースもしくは配管を接続する異径ホース継手に関するものである。   The present invention relates to a different diameter hose joint for connecting hoses or pipes having different diameters.

たとえば寒冷地などでは給湯機や暖房機が室内に載置されており、家屋の壁にウォールトップ（登録商標）を埋設しておき、ウォールトップと給湯機や暖房機を二系統のホース（配管）で繋ぎ、屋外からウォールトップを介して外気を取り込み、一系統のホースを介して給湯機に供給するとともに、給湯機から排気された排ガスを他系統の配管を介し、ウォールトップを介して屋外に排気する給湯システムや暖房システムが用いられているケースが多い。壁に埋設されたウォールトップを介して外気の流入や排ガスの排気を実現したことで、風とともに屋内に吹き込み得る雨水の屋内への侵入を阻止することが可能となる。   For example, in cold districts, water heaters and heaters are installed indoors, and a wall top (registered trademark) is embedded in the wall of the house, and the wall top and the water heater and heater are connected to two hoses (piping). ), The outside air is taken in from outside through the wall top and supplied to the water heater through one system hose, and the exhaust gas exhausted from the water heater through the other system piping and through the wall top to the outside In many cases, a hot water supply system or a heating system is used. Realizing inflow of outside air and exhaust of exhaust gas through the wall top embedded in the wall makes it possible to prevent intrusion of rainwater that can be blown indoors with the wind.

このウォールトップと給気用のホースや排気用の配管との継手態様は、ウォールトップの本体から突出する管が、給気用の樹脂製のホースと継手を介して接続され、排気用の金属製の配管とビス留めやリベット留め、もしくはロック機構にて接続される態様でおこなわれる。   The joint between the wall top and the air supply hose or exhaust pipe is such that the pipe protruding from the wall top body is connected to the air supply resin hose via the joint, and the exhaust metal It is performed in such a manner that it is connected to the pipe made of screws by screwing, riveting, or a locking mechanism.

ところで、ホースとしては二重構造（二重管構造）のものが使用されることがあり、二重管を適用することで内側に新鮮な外気を流通させるとともに外管と内管の間に形成された保温層で結露防止を図ることができる。なお、配管を構成する内管に給湯機からの排ガスを流通させ、内管と外管の間に新鮮な外気を流通させる使用態様もある。   By the way, a double hose (double pipe structure) may be used as a hose. By applying a double pipe, fresh outside air is circulated inside and formed between the outer pipe and the inner pipe. Condensation can be prevented with the heat insulating layer. There is also a usage mode in which the exhaust gas from the water heater is circulated through the inner pipe constituting the piping, and fresh outside air is circulated between the inner pipe and the outer pipe.

このようにホースを二重構造としたことでホース自身の結露は防止できる一方で、ホースと継手の接続部やウォールトップの管と継手の接続部にはこのような対策が講じられていないことから、ウォールトップとホースを繋ぐ継手における結露の発生が解決すべき課題となっている。   While the hose has a double structure in this way, condensation on the hose itself can be prevented, but such measures are not taken at the connection between the hose and the joint and between the wall top pipe and the joint. Therefore, the occurrence of condensation in the joint connecting the wall top and the hose is a problem to be solved.

特に、継手はその一端で二重構造のホースを接続するとともに、その他端でウォールトップの一重の管を接続するものであることから、一重の継手部分の結露を有効に防止できる異径ホース継手の開発が急務の課題となっている。   In particular, the joint is connected to a double structure hose at one end and a single wall top tube from the other end, so it can effectively prevent dew condensation on the single joint. Development has become an urgent issue.

ここで、特許文献１には、２つの異径のホースをそれぞれに固有の２つの異径の継手管に形成した螺旋溝に螺入し、各継手管の外周にそれぞれ***した環状***部を形成し、内周両側を鈍角状に開成したバンドによって２つの環状***部同士の突き合わせ部を外周から着脱自在に被嵌してなる異径ホース継手が開示されている。   Here, in Patent Document 1, two hoses with different diameters are screwed into spiral grooves formed in two joint pipes with different diameters, respectively, and annular raised portions that are raised on the outer periphery of each joint pipe are provided. A different diameter hose joint is disclosed in which the butted portions of two annular ridges are detachably fitted from the outer periphery by bands formed and obtusely formed on both sides of the inner periphery.

また、特許文献２には、継手の内周面に、一方の基端側管体に挿脱可能に装着したブッシング部材を介してこの基端側管体を係止可能とした係止突部と、他方の電線保護用管体を接続する差込継手体のテーパー状の係止部を係止可能としたカットリング状の抜け止め部材を備えた継手が開示されている。ここで開示されるブッシング部材は、一端開口縁を外方に向けて略Ｕ字状に折り返して成るフランジ部を備えており、また、差込継手体は、後部で電線保護用管体を接続可能にし、差込方向前部のテーパー状の係止部によって、継手の本体内における抜け止め部材を拡径して差込継手体自体を進入させ、縮径した抜け止め部材を係止溝に係止可能となっている。   Further, Patent Document 2 discloses a locking projection that can lock the proximal-side tube body via a bushing member that is detachably attached to one proximal-side tube body on the inner peripheral surface of the joint. And the coupling provided with the cut ring-shaped retaining member which can lock the taper-shaped latching | locking part of the insertion coupling body which connects the other electric wire protection pipe body is disclosed. The bushing member disclosed herein includes a flange portion formed by folding back into a substantially U shape with the opening edge of one end facing outward, and the plug joint body is connected to the wire protection tube body at the rear portion. It is possible to increase the diameter of the retaining member in the joint body by the tapered locking portion at the front part in the insertion direction and to allow the insertion joint body itself to enter, and to use the reduced retaining member in the locking groove. It can be locked.

また、特許文献３には、小口径管の接続端部に形成したフランジ部と大口径管の接続端部との間に、フランジ部に当接するパッキン材と、大口径管の接続端部の内部に収納されてパッキン材をフランジ部側に押圧する受用継手を介在させ、小口径管の接続端部に嵌め込まれてフランジ部にて抜け止めされた袋ナットを大口径管の接続端部の外ねじに螺着させてなる配管の接続構造が開示されている。   Patent Document 3 discloses a packing material that contacts the flange portion between the flange portion formed at the connection end portion of the small diameter pipe and the connection end portion of the large diameter pipe, and the connection end portion of the large diameter pipe. Insert a receiving joint that is housed inside and press the packing material toward the flange, and the cap nut that is fitted into the connection end of the small-diameter pipe and is prevented from coming off by the flange is connected to the connection end of the large-diameter pipe. A connection structure for piping that is screwed onto an external screw is disclosed.

さらに、特許文献４には、ジョイント本体と、第１および第２ナットと、第１および第２フェラールと、第１および第２シールリングにて構成し、第１および第２ナットの締め込みで第１および第２シールリングによって第１管および第２管を抜け落ちないように保持するとともに、第１および第２ナットを緩めて第１管および第２管をジョイントから抜き出すことを可能にした管継手が開示されている。   Further, Patent Document 4 includes a joint body, first and second nuts, first and second ferrules, first and second seal rings, and tightening the first and second nuts. The first and second seal rings hold the first and second pipes so as not to fall off, and the first and second nuts are loosened so that the first and second pipes can be extracted from the joint. A coupling is disclosed.

上記特許文献１〜４で開示の継手はいずれも、２つの管もしくはホースと直接繋がれる２つの部材を別途の部材で繋いだ構成を適用していることから、部材点数の増加やこれに起因して継手にてホースを繋ぐ際の組み付け手間がかかり、改善の余地のある技術であることは否めない。   All of the joints disclosed in Patent Documents 1 to 4 apply a configuration in which two members directly connected to two pipes or hoses are connected by separate members, resulting in an increase in the number of members and this. Therefore, it takes time and effort to assemble the hose with the joint, and it cannot be denied that the technology has room for improvement.

さらに、上記する従来技術の有する課題、すなわち、結露を有効に防止できる異径ホース継手を提供するものでもない。   Furthermore, it does not provide a different diameter hose joint that can effectively prevent the above-described problems of the prior art, that is, condensation.

実用新案登録第２５４４０３９号公報Utility Model Registration No. 2544039 実用新案登録第３１５１３８７号公報Utility Model Registration No. 3151387 実開平６−１４６７３号公報Japanese Utility Model Publication No. 6-14673 実開平６−１９７１号公報Japanese Utility Model Publication No. 6-1971

本発明は上記する問題に鑑みてなされたものであり、少ない部品点数で結露を有効に防止しながら異径のホースを繋ぐことのできる異径ホース継手を提供することを目的としている。   The present invention has been made in view of the above-described problems, and an object thereof is to provide a different diameter hose joint that can connect different diameter hoses while effectively preventing condensation with a small number of parts.

前記目的を達成すべく、本発明による異径ホース継手は、２以上の異径のホースを繋ぐ、中空と該中空に連通する２つの端部開口（第１の端部開口と第２の端部開口）を有する異径ホース継手であって、前記異径ホース継手は、第１の端部開口から中空へ挿入される異径の第１のホースと第２のホースのそれぞれの端部が固定される第１の固定部と第２の固定部を備えており、第２の端部開口から中空へ挿入される第３のホースの端部が固定される第３の固定部を第１の固定部および第２の固定部とは異なる位置に備えているものである。   In order to achieve the above object, a different diameter hose joint according to the present invention connects a hollow and two end openings (first end opening and second end) communicating with the hollow connecting two or more different diameter hoses. The different diameter hose joint has a first diameter hose and a second hose inserted into the hollow from the first end opening. The first fixing portion and the second fixing portion to be fixed are provided, and the third fixing portion to which the end portion of the third hose inserted into the hollow from the second end opening is fixed is the first fixing portion. The fixed portion and the second fixed portion are provided at different positions.

本発明の異径ホース継手は、１つの継手本体で２以上の異径のホースを繋ぐものであり、したがって、部品点数を最小としながら、全てのホースを繋ぐ際の組み付け手間のかからない異径ホース継手である。ここで、以下、「ホース」とは、樹脂製のホースのほか、金属製の配管も含むものとする。   The different diameter hose joint of the present invention connects two or more different diameter hoses with one joint body, and therefore, the different diameter hose does not require assembling work when connecting all hoses while minimizing the number of parts. It is a joint. Here, hereinafter, the “hose” includes not only a resin hose but also a metal pipe.

この異径ホース継手は、その継手本体がたとえば筒状を呈しており、継手本体の２つの端部開口の一方からたとえば二重構造のホースを構成する内側ホースと外側ホースが継手本体に設けられた２つの固定部（第１、第２の固定部）にそれぞれ固定されるようになっている。なお、この固定態様は、勘合による固定や継手本体と各ホースのそれぞれにネジ溝が形成されていて螺合による固定などを挙げることができる。   The joint body of this different diameter hose joint has, for example, a cylindrical shape, and an inner hose and an outer hose constituting a hose having a double structure, for example, are provided on the joint body from one of the two end openings of the joint body. The two fixing portions (first and second fixing portions) are fixed respectively. In addition, this fixing mode can include fixing by fitting, fixing by screwing because a thread groove is formed in each of the joint body and each hose.

また、二重構造のホースとは異なる別途のホース、たとえばウォールトップの一部をなす管が継手本体の２つの端部開口の他方から挿入され、第１、第２の固定部とは異なる別途の第３の固定部にて固定されるようになっている。   In addition, a separate hose different from the double structure hose, for example, a pipe forming a part of the wall top is inserted from the other of the two end openings of the joint body, and is different from the first and second fixing parts. The third fixing portion is fixed.

上記する第１、第２、第３の固定部はそれぞれ、本体の中空壁面に形成されたり、継手本体の肉厚にたとえば環状の凹溝として形成されることで各種のホースと勘合もしくは螺合されるようになっている。   Each of the first, second, and third fixing portions described above is formed on the hollow wall surface of the main body, or is formed as an annular concave groove on the wall thickness of the joint main body so as to be fitted or screwed with various hoses. It has come to be.

いずれの形態にせよ、１つの継手本体の３つの異なる固定部に異径の３つのホースが繋がれることになる。   In any form, three hoses having different diameters are connected to three different fixing portions of one joint body.

また、本発明による異径ホース継手の他の実施の形態として、前記異径ホース継手は、前記第１の端部開口を形成する端部の環状の肉厚内に第１の環状の凹溝を備え、該第１の環状の凹溝が第１の固定部となっており、前記第２の端部開口を形成する端部の環状の肉厚内に第２の環状の凹溝を備えており、第１の環状の凹溝からなる第１の固定部に第２のホースよりも大径の第１のホースの端部が固定され、その内側の中空の壁面に形成された第２の固定部に第２のホースの端部が固定されるようになっており、第２の環状の凹溝に環状の断熱材が固定され、その内側の中空の壁面に形成された第３の固定部に第３のホースの端部が固定されるようになっており、第１のホースと第２のホースのそれぞれの端部が重ね合わされて第１の端部開口側にて異径ホースからなる二重構造が形成され、環状の断熱材と第３のホースの端部が重ね合わされて第２の端部開口側にて断熱材とホースからなる二重構造が形成される形態を挙げることができる。   As another embodiment of the different diameter hose joint according to the present invention, the different diameter hose joint has a first annular concave groove in an annular thickness of an end portion forming the first end opening. The first annular groove is a first fixing portion, and the second annular groove is provided in the annular thickness of the end portion forming the second end opening. The end portion of the first hose having a diameter larger than that of the second hose is fixed to the first fixing portion formed of the first annular groove, and the second portion formed on the hollow wall surface inside the first hose. The end portion of the second hose is fixed to the fixing portion of the second hose, an annular heat insulating material is fixed to the second annular groove, and the third hose formed on the hollow wall surface inside thereof. The end portion of the third hose is fixed to the fixing portion, and the end portions of the first hose and the second hose are overlapped to open the first end portion. A double structure composed of different diameter hoses is formed on the side, and an end of the annular heat insulating material and the third hose is overlapped, and a double structure composed of the heat insulating material and the hose is formed on the second end opening side. The form to be formed can be mentioned.

本実施の形態の異径ホース継手は、第１の端部開口の構成として、端部の環状の肉厚内に第１の環状の凹溝を有し、この第１の環状の凹溝が第１の固定部となっており、その内側の中空の壁面に第２の固定部が形成され、第１の環状の凹溝からなる第１の固定部に第２のホースよりも大径の第１のホースの端部が固定され、その内側の中空の壁面に形成された第２の固定部に第２のホースの端部が固定され、第１のホースと第２のホースのそれぞれの端部が重ね合わされて第１の端部開口側にて異径ホースからなる二重構造が形成され、この二重構造によって第１の端部開口側にて結露防止が図られるものである。なお、本明細書において、「重ね合わされて」とは、たとえば２つの異径のホースが直接重ね合わされるというよりは、間隔を置いて重ね合わされる形態を意味している。   The different diameter hose joint of the present embodiment has a first annular groove in the annular thickness of the end portion as a configuration of the first end opening, and the first annular groove is It becomes the 1st fixed part, the 2nd fixed part is formed in the hollow wall surface inside, and the diameter of the 1st fixed part which consists of the 1st annular concave groove is larger than the 2nd hose. The end portion of the first hose is fixed, the end portion of the second hose is fixed to the second fixing portion formed on the hollow wall inside the first hose, and each of the first hose and the second hose is fixed. The end portions are overlapped to form a double structure consisting of different diameter hoses on the first end opening side, and this double structure prevents condensation on the first end opening side. In the present specification, “superposed” means, for example, a form in which two hoses having different diameters are superposed at intervals rather than directly superposed.

一方、第２の端部開口の構成として、端部の環状の肉厚内に第２の環状の凹溝を有し、第２の環状の凹溝に環状の断熱材が固定され、その内側の中空の壁面に形成された第３の固定部に第３のホースの端部が固定され、環状の断熱材と第３のホースの端部が重ね合わされて第２の端部開口側にて断熱材とホースからなる二重構造が形成され、この二重構造によって第２の端部開口側にて結露防止が図られるものである。なお、ここでいう第３のホースとしては、たとえばウォールトップの一部をなす金属製の配管を挙げることができる。   On the other hand, as a configuration of the second end opening, there is a second annular groove in the annular thickness of the end, and an annular heat insulating material is fixed to the second annular groove, and the inside The end portion of the third hose is fixed to the third fixing portion formed on the hollow wall surface, and the end portion of the annular heat insulating material and the third hose is overlaid on the second end opening side. A double structure composed of a heat insulating material and a hose is formed, and this double structure prevents condensation on the second end opening side. As the third hose here, for example, a metal pipe forming a part of a wall top can be cited.

このように、本実施の形態の異径ホース継手によれば、筒状の継手本体の２つの端部開口のそれぞれに二重構造の結露防止措置が施されていることから、既述するように１つの部材で２以上の異径のホースを繋ぐことで部品点数を最小としながら、結露を効果的に防止することが可能となる。   As described above, according to the different diameter hose joint of the present embodiment, since the double-structure dew condensation prevention measure is applied to each of the two end openings of the tubular joint body, as described above. By connecting two or more hoses having different diameters with one member, it is possible to effectively prevent condensation while minimizing the number of parts.

また、本発明による異径ホース継手のさらに他の実施の形態は、前記異径ホース継手は、第２の端部開口から中空へ挿入される第３のホースとは別途の第４のホースの端部が固定される第４の固定部を、第１の固定部、第２の固定部および第３の固定部とは異なる位置に備えており、前記第１の端部開口を形成する端部の環状の肉厚内に第１の環状の凹溝を備え、該第１の環状の凹溝が第１の固定部となっており、前記第２の端部開口を形成する端部の環状の肉厚内に第２の環状の凹溝を備え、該第２の環状の凹溝が第４の固定部となっており、第１の環状の凹溝からなる第１の固定部に第２のホースよりも大径の第１のホースの端部が固定され、その内側の中空の壁面に形成された第２の固定部に第２のホースの端部が固定されるようになっており、第２の環状の凹溝からなる第４の固定部に第３のホースよりも大径の第４のホースの端部が固定され、その内側の中空の壁面に形成された第３の固定部に第３のホースの端部が固定されるようになっており、第１のホースと第２のホースのそれぞれの端部が重ね合わされて第１の端部開口側にて異径ホースからなる二重構造が形成され、第３のホースと第４のホースのそれぞれの端部が重ね合わされて第２の端部開口側にて異径ホースからなる二重構造が形成されるものである。   Furthermore, in another embodiment of the different diameter hose joint according to the present invention, the different diameter hose joint is a fourth hose separate from the third hose inserted into the hollow from the second end opening. An end that forms the first end opening is provided with a fourth fixing portion to which the end portion is fixed at a position different from the first fixing portion, the second fixing portion, and the third fixing portion. A first annular groove is provided in the annular thickness of the portion, the first annular groove serves as a first fixing portion, and an end portion forming the second end opening is provided. A second annular concave groove is provided in the annular thickness, and the second annular concave groove is a fourth fixed portion, and the first fixed portion comprising the first annular concave groove is The end portion of the first hose having a larger diameter than the second hose is fixed, and the end portion of the second hose is fixed to the second fixing portion formed on the hollow wall surface inside the second hose. The end of the fourth hose having a diameter larger than that of the third hose is fixed to the fourth fixing portion made of the second annular groove, and the third formed on the hollow wall surface inside the fourth hose. The end portion of the third hose is fixed to the fixing portion of the first hose, and the respective ends of the first hose and the second hose are overlapped to have different diameters on the first end opening side. A double structure consisting of hoses is formed, and the ends of the third hose and the fourth hose are overlapped to form a double structure consisting of different diameter hoses on the second end opening side. It is.

本実施の形態の異径ホース継手は、ウォールトップと給湯機を繋いで新鮮な外気を給湯機に提供するためのホースを二重構造とすることに加えて、ウォールトップから突出して異径ホース継手に繋がれる管も二重構造とし、これら二種の二重構造のホース（もしくは管）を１つの異径ホース継手の２つの端部開口のそれぞれに繋ぐ際に適用されるものである。   The different diameter hose joint of the present embodiment has a double hose for connecting the wall top and the hot water heater to provide fresh outside air to the hot water heater, and projects from the wall top to have a different diameter hose. The pipe connected to the joint also has a double structure, and is applied when connecting these two kinds of double structure hoses (or pipes) to each of the two end openings of one different diameter hose joint.

第１の端部開口を形成する端部の環状の肉厚内に第１の環状の凹溝を備えてこの第１の環状の凹溝を第１の固定部とし、第２の端部開口を形成する端部の環状の肉厚内に第２の環状の凹溝を備えてこの第２の環状の凹溝が第４の固定部とする。   A first annular groove is provided in the annular thickness of the end portion forming the first end opening, and the first annular groove is used as the first fixing portion, and the second end opening is provided. A second annular groove is provided in the annular thickness of the end portion forming the second annular groove, and this second annular groove serves as the fourth fixing portion.

そして、第１の環状の凹溝からなる第１の固定部の内側の中空の壁面に第２の固定部を形成しておき、第１のホースと第２のホースをそれぞれ第１、第２の固定部に固定して二重構造を形成する。   And the 2nd fixing | fixed part is formed in the hollow wall surface inside the 1st fixing | fixed part which consists of a 1st annular groove, and the 1st hose and the 2nd hose are respectively 1st, 2nd. A double structure is formed by fixing to the fixing part.

さらに、第２の環状の凹溝からなる第４の固定部の内側の中空の壁面に第３の固定部を形成しておき、第３のホースと第４のホースをそれぞれ第３、第４の固定部に固定して二重構造を形成する。   Furthermore, a third fixing portion is formed on a hollow wall surface inside the fourth fixing portion made of the second annular groove, and the third hose and the fourth hose are respectively connected to the third and fourth hoses. A double structure is formed by fixing to the fixing part.

このように、本実施の形態の異径ホース継手によっても、筒状の継手本体の２つの端部開口のそれぞれに二重構造の結露防止措置が施されていることから、既述するように１つの部材で２以上の異径のホースを繋ぐことで部品点数を最小としながら、結露を効果的に防止することが可能となる。   Thus, even with the different-diameter hose joint of the present embodiment, the double-structure dew condensation prevention measure is applied to each of the two end openings of the tubular joint body, as described above. By connecting two or more different diameter hoses with one member, it is possible to effectively prevent condensation while minimizing the number of parts.

また、本発明による異径ホース継手のさらに他の実施の形態において、前記異径ホース継手は、中空の壁面において、第１の端部開口側から順に、第１の固定部、第２の固定部、第３の固定部が形成されており、第１のホースと第２のホースのそれぞれの端部が重ね合わされて第１の端部開口側にて異径ホースからなる二重構造が形成されるものである。   Furthermore, in still another embodiment of the different diameter hose joint according to the present invention, the different diameter hose joint includes a first fixing portion and a second fixing in order from the first end opening side on the hollow wall surface. And a third fixing portion are formed, and the end portions of the first hose and the second hose are overlapped to form a double structure composed of different diameter hoses on the first end opening side. It is what is done.

本実施の形態では、第１、第２、第３の固定部が筒状の継手本体の中空内に並んだ態様で形成されている。ただし、第１、第２のホースが重ね合わされた態様で第１、第２の固定部に固定される関係上、継手本体は拡径部を有していてこの拡径部の中空に第１の固定部が形成され、この拡径部に連続する縮径部の中空に第２の固定部とさらに第３の固定部が形成された構成となっている。   In the present embodiment, the first, second, and third fixing portions are formed in a form in which they are arranged in the hollow of the cylindrical joint body. However, since the first and second hoses are overlapped and fixed to the first and second fixing portions, the joint body has an enlarged diameter portion, and the first enlarged portion is hollow. The fixed portion is formed, and the second fixed portion and the third fixed portion are formed in the hollow of the reduced diameter portion continuous to the expanded diameter portion.

以上の説明から理解できるように、本発明の異径ホース継手によれば、１つの継手本体で２以上の異径のホースを繋ぐ構成としたことによって、部品点数を最小としながら、全てのホースを繋ぐ際に組み付け手間のかからない異径ホース継手を提供することができる。また、２つの端部開口を有する異径ホース継手の少なくとも一方の端部開口には異径のホースが重ね合わされた態様で繋がれた二重構造を形成していることで、異径ホース継手にて生じ得る結露を効果的に解消することができる。   As can be understood from the above description, according to the different diameter hose joint of the present invention, all the hoses can be obtained while minimizing the number of components by connecting two or more different diameter hoses with one joint body. Thus, it is possible to provide a different diameter hose joint that does not require assembling work. In addition, by forming a double structure in which at least one end opening of the different diameter hose joint having two end openings is connected in a manner in which the different diameter hoses are overlapped, the different diameter hose joint is formed. It is possible to effectively eliminate condensation that may occur in

家屋の壁に埋設されたウォールトップと給湯機を異径ホース継手を介して繋いでなる給湯システムの模式図である。It is a schematic diagram of the hot water supply system which connects the wall top embed | buried under the wall of a house, and a hot water supply machine via a different diameter hose coupling. 異径ホース継手の実施の形態１と異径ホースの分解縦断面図である。1 is an exploded vertical cross-sectional view of Embodiment 1 of a different diameter hose joint and a different diameter hose. 異径ホース継手の実施の形態１と異径ホースの組み付け縦断面図である。It is assembly | attachment longitudinal cross-sectional view of Embodiment 1 of a different diameter hose coupling and a different diameter hose. （ａ）は図３のIVa−IVa矢視図であり、（ｂ）は図３のIVb−IVb矢視図である。(A) is an IVa-IVa arrow view of FIG. 3, (b) is an IVb-IVb arrow view of FIG. 異径ホース継手の実施の形態２と異径ホースの組み付け縦断面図である。It is assembly | attachment longitudinal cross-sectional view of Embodiment 2 of a different diameter hose coupling and a different diameter hose. 異径ホース継手の実施の形態３と異径ホースの組み付け縦断面図である。It is assembly | attachment longitudinal cross-sectional view of Embodiment 3 and a different diameter hose of a different diameter hose coupling.

以下、図面を参照して、本発明の異径ホース継手の実施の形態１，２，３を説明する。なお、図示例は異径ホース継手が給湯システムに適用される形態を示したものであるが、本発明の異径ホース継手が給湯システム以外の様々なシステムに適用できるものであることは勿論のことであり、異径ホース同士を繋ぐ多様な用途に適用可能である。   Embodiments 1, 2, and 3 of the different diameter hose joint of the present invention will be described below with reference to the drawings. In addition, although the example of illustration shows the form by which a different diameter hose coupling is applied to a hot water supply system, of course, the different diameter hose coupling of this invention is applicable to various systems other than a hot water supply system. That is, it can be applied to various uses for connecting different diameter hoses.

（給湯システムの概要と異径ホース継手の実施の形態１）
図１は家屋の壁に埋設されたウォールトップと給湯機を異径ホース継手を介して繋いでなる給湯システムの模式図である。また、図２は異径ホース継手の実施の形態１と異径ホースの分解縦断面図であり、図３は異径ホース継手の実施の形態１と異径ホースの組み付け縦断面図であり、図４ａは図３のIVa−IVa矢視図であり、図４ｂは図３のIVb−IVb矢視図である。 (Outline of hot water supply system and embodiment 1 of different diameter hose joint)
FIG. 1 is a schematic view of a hot water supply system in which a wall top embedded in a wall of a house and a hot water heater are connected via a different diameter hose joint. 2 is an exploded longitudinal sectional view of the different diameter hose joint according to Embodiment 1 of the different diameter hose joint, and FIG. 3 is an assembled longitudinal sectional view of the different diameter hose joint according to Embodiment 1 of the different diameter hose. 4a is a view taken along the arrow IVa-IVa in FIG. 3, and FIG. 4b is a view taken along the arrow IVb-IVb in FIG.

まず、本発明の異径ホース継手を含む給湯システムの概要を説明すると、図１で示す給湯システムは、家屋の壁Ｗに埋設されたウォールトップＴの家屋内で突出する２つの管Ｈ３、Ｈ４のうち、一方の管Ｈ３に異径ホース継手１０が繋がれ、この異径ホース継手１０には二重構造のホースＨ１，Ｈ２が繋がれており、他方の管Ｈ４には金属管Ｓ１が繋がれ、この金属管Ｓ１には金属管Ｓ２（エルボ）がさらに繋がれ、これら二重構造のホースＨ１，Ｈ２や金属管Ｓ２が不図示の１基の家屋内に載置された給湯機に繋がれてその全体が大略構成されている。なお、管Ｈ４と給湯機の接続形態は図示例以外にも、２以上の金属管Ｓ１と２以上の金属管Ｓ２が繋ぐ形態や金属管Ｓ１のみが繋ぐ形態など、多様な接続形態が存在する。   First, the outline of the hot water supply system including the different-diameter hose joint of the present invention will be described. The hot water supply system shown in FIG. 1 has two pipes H3 and H4 projecting in the house of the wall top T embedded in the wall W of the house. Among these, the different diameter hose joint 10 is connected to one pipe H3, the double-structure hoses H1 and H2 are connected to the different diameter hose joint 10, and the metal pipe S1 is connected to the other pipe H4. The metal pipe S1 is further connected to a metal pipe S2 (elbow), and these double-structured hoses H1 and H2 and the metal pipe S2 are connected to a water heater placed in a single house (not shown). The whole is roughly structured. In addition, the connection form of the pipe H4 and the water heater includes various connection forms such as a form in which two or more metal pipes S1 and two or more metal pipes S2 are connected or a form in which only the metal pipe S1 is connected. .

ウォールトップＴは中央の排気管とその外側の環状の給気管が二重構造になっており、環状の給気管が外部に流体連通する箇所に環状開口Ｔａが設けられ、この環状開口Ｔａを介して新鮮な外気が導入され（Ｘ１方向）、ウォールトップＴを介し、管Ｈ３を介し、異径ホース継手１０を介し、二重構造のホースＨ１，Ｈ２を介して不図示の給湯機に提供されるようになっている（Ｘ２方向）。   The wall top T has a double structure with a central exhaust pipe and an annular air supply pipe outside the wall, and an annular opening Ta is provided at a location where the annular air supply pipe is in fluid communication with the outside. Fresh outside air is introduced (in the X1 direction) and supplied to a water heater (not shown) through the wall top T, through the pipe H3, through the different diameter hose joint 10, and through the double-structured hoses H1 and H2. (X2 direction).

一方、不図示の給湯機から排気された排ガスは、相互に接続された一重の金属管Ｓ２，Ｓ１を介し（Ｘ３方向）、ウォールトップＴの管Ｈ４を介し、ウォールトップＴの中央の排気管を介して屋外へ排気されるようになっている（Ｘ４方向）。   On the other hand, the exhaust gas exhausted from a water heater (not shown) passes through the single metal pipes S2 and S1 connected to each other (X3 direction), through the pipe H4 of the wall top T, and the exhaust pipe at the center of the wall top T. The air is exhausted to the outside through the (X4 direction).

ウォールトップＴはステンレス（たとえばSUS304）から形成され、異径ホース継手１０は樹脂から形成され、ホースＨ１，Ｈ２は樹脂から形成され、金属管Ｓ１，Ｓ２はステンレス（たとえばSUS304）から形成される。   The wall top T is formed of stainless steel (for example, SUS304), the different diameter hose joint 10 is formed of resin, the hoses H1 and H2 are formed of resin, and the metal tubes S1 and S2 are formed of stainless steel (for example, SUS304).

次に、図２〜４を参照して異径ホース継手１０の構成を説明する。   Next, the structure of the different diameter hose joint 10 will be described with reference to FIGS.

図２で示すように、異径ホース継手１０は筒状の継手本体１から構成され、同図にて右側にある第１の端部開口１ａ側には肉厚内に第１の環状の凹溝２を備え、この第１の環状の凹溝２にはネジ溝が形成されていて第１の固定部を形成している。   As shown in FIG. 2, the different diameter hose joint 10 is composed of a tubular joint body 1, and a first annular recess is formed within the wall thickness on the first end opening 1a side on the right side in FIG. A groove 2 is provided, and a thread groove is formed in the first annular groove 2 to form a first fixing portion.

また、第１の環状の凹溝２の内側にある継手本体１の中空壁面にもネジ溝が形成されており、第２の固定部３を形成している。   Further, a screw groove is also formed on the hollow wall surface of the joint body 1 inside the first annular groove 2, and the second fixing portion 3 is formed.

そして、第１の固定部２に相対的に大径の第１のホースＨ１が螺合され（Ｙ１方向）、第２の固定部３に相対的に小径の第２のホースＨ２が螺合されるようになっている（Ｙ１方向）。たとえば、第１のホースＨ１がφ100mm、第２のホースＨ２がφ80mmの外径をそれぞれ有した形態とこれらを螺合自在な第１、第２の固定部２，３の形態を一例として挙げることができる。   Then, the first hose H1 having a relatively large diameter is screwed to the first fixing portion 2 (Y1 direction), and the second hose H2 having a relatively small diameter is screwed to the second fixing portion 3. (Y1 direction). For example, the configuration in which the first hose H1 has an outer diameter of φ100 mm and the second hose H2 has an outer diameter of φ80 mm and the configurations of the first and second fixing portions 2 and 3 that can be screwed together are taken as an example. Can do.

一方、図２の左側にある継手本体１の第２の端部開口１ｂ側にも肉厚内に第２の環状の凹溝４を備え、第２の環状の凹溝４の内側にある継手本体１の中空壁面はテーパー面となっており、第３の固定部５を形成している。   On the other hand, a second annular groove 4 is also provided in the wall thickness on the second end opening 1b side of the joint body 1 on the left side of FIG. 2, and the joint is located inside the second annular groove 4. The hollow wall surface of the main body 1 is a tapered surface and forms a third fixing portion 5.

第２の環状の凹溝４には環状の断熱材２０が挿入されるようになっており（Ｙ２方向）、この環状の断熱材２０よりも小径でテーパー面を具備する第３のホースＨ３が第３の固定部５に勘合されるようなっている（Ｙ２方向）。   An annular heat insulating material 20 is inserted into the second annular groove 4 (Y2 direction), and a third hose H3 having a smaller diameter and a tapered surface than the annular heat insulating material 20 is provided. The third fixing portion 5 is fitted (Y2 direction).

図３は、異径ホース継手１０を構成する第１、第２の固定部２，３に第１、第２のホースＨ１，Ｈ２がそれぞれ螺合され、第３の固定部５に第３のホースＨ３が勘合され、第２の環状の凹溝４に環状の断熱材２０が挿入されて組み付けが完了した状態を示している。なお、第１の固定部２に第１のホースＨ１が螺合された状態において、第２の固定部３と第１のホースＨ１の間には空気層が形成される。   In FIG. 3, the first and second fixing portions 2 and 3 constituting the different diameter hose joint 10 are respectively screwed into the first and second hoses H 1 and H 2, and the third fixing portion 5 is connected to the third fixing portion 5. The state where the hose H3 is fitted and the annular heat insulating material 20 is inserted into the second annular groove 4 and the assembly is completed is shown. In the state where the first hose H1 is screwed to the first fixing portion 2, an air layer is formed between the second fixing portion 3 and the first hose H1.

同図で示すように、第１のホースＨ１と第２のホースＨ２のそれぞれの端部が重ね合わされて第１の端部開口１ａ側にて異径ホースからなる二重構造Ｄ１が形成され、この二重構造Ｄ１によって第１の端部開口１ａ側にて結露防止が図られる。なお、図４ａはこの二重構造Ｄ１を直交方向で見た縦断面図である。   As shown in the figure, the end portions of the first hose H1 and the second hose H2 are overlapped to form a double structure D1 composed of different diameter hoses on the first end opening 1a side, This double structure D1 prevents condensation on the first end opening 1a side. FIG. 4a is a longitudinal sectional view of the double structure D1 viewed in the orthogonal direction.

一方、環状の断熱材２０と第３のホースＨ３の端部が重ね合わされて第２の端部開口１ｂ側にて断熱材２０とホースＨ３からなる二重構造Ｄ２が形成され、この二重構造Ｄ２によって第２の端部開口１ｂ側にて結露防止が図られる。なお、図４ｂはこの二重構造Ｄ２を直交方向で見た縦断面図である。   On the other hand, the end portions of the annular heat insulating material 20 and the third hose H3 are overlapped to form a double structure D2 composed of the heat insulating material 20 and the hose H3 on the second end opening 1b side. D2 prevents condensation on the second end opening 1b side. FIG. 4b is a longitudinal sectional view of the double structure D2 viewed in the orthogonal direction.

このように、図示する異径ホース継手１０によれば、１つの継手本体１のみによって３つの異径ホースＨ１，Ｈ２，Ｈ３を簡易に繋ぐことができ、しかも、継手本体１の両端においてそれぞれ固有の二重構造Ｄ１，Ｄ２を形成して結露の発生を効果的に抑制することができる。   As described above, according to the illustrated different diameter hose joint 10, the three different diameter hoses H 1, H 2, and H 3 can be easily connected by only one joint body 1, and each end of the joint body 1 is unique. The double structures D1 and D2 can be formed to effectively suppress the occurrence of condensation.

なお、図３で示す異径ホース継手１０において、継手本体１と環状の断熱材２０、および第３のホースＨ３をより一層強固に固定するべく、継手本体１の第２の環状の凹溝４の外周に不図示のバンドを取り付けた構成としてもよい。   In addition, in the different diameter hose joint 10 shown in FIG. 3, in order to fix the joint main body 1, the cyclic | annular heat insulating material 20, and the 3rd hose H3 still more firmly, the 2nd cyclic | annular concave groove 4 of the joint main body 1 is shown. It is good also as a structure which attached the band not shown to the outer periphery of.

（異径ホース継手の実施の形態２）
図５は異径ホース継手の実施の形態２と異径ホースの組み付け縦断面図である。 (Embodiment 2 of different diameter hose joint)
FIG. 5 is a longitudinal sectional view of the second embodiment of the different diameter hose joint and the assembly of the different diameter hose.

図５で示すように、異径ホース継手１０Ａは筒状の継手本体１Ａから構成され、この継手本体１Ａは、その中央位置を線対称として左右に同じ構成を備えている。   As shown in FIG. 5, the different diameter hose joint 10 </ b> A is composed of a tubular joint body 1 </ b> A, and this joint body 1 </ b> A has the same configuration on the left and right with its center position being line symmetrical.

より具体的には、第１の端部開口１ａを形成する端部の環状の肉厚内に第１の環状の凹溝２を備え、この第１の環状の凹溝２が第１の固定部となっており、第２の端部開口１ｂを形成する端部の環状の肉厚内に第２の環状の凹溝２Ａを備え、この第２の環状の凹溝２Ａが第４の固定部となっている。   More specifically, a first annular groove 2 is provided in the annular thickness of the end portion forming the first end opening 1a, and the first annular groove 2 is the first fixed. The second annular groove 2A is provided in the annular thickness of the end portion forming the second end opening 1b, and the second annular groove 2A is the fourth fixed portion. Has become a department.

第１の環状の凹溝からなる第１の固定部２に相対的に大径の第１のホースＨ１の端部が螺合され、その内側の中空の壁面に形成された第２の固定部３に第２のホースＨ２の端部が螺合される。一方、第２の環状の凹溝からなる第４の固定部２Ａに相対的に大径の第４のホースＨ５の端部が螺合され、その内側の中空の壁面に形成された第３の固定部３Ａに第３のホースＨ４の端部が螺合される。   A second fixing portion formed on a hollow wall surface inside the end portion of the first hose H1 having a relatively large diameter is screwed into the first fixing portion 2 formed of the first annular groove. 3, the end of the second hose H2 is screwed together. On the other hand, the end portion of the relatively large-diameter fourth hose H5 is screwed into the fourth fixed portion 2A formed of the second annular groove, and a third wall formed on the inner hollow wall surface thereof. The end portion of the third hose H4 is screwed to the fixing portion 3A.

そして、第１のホースＨ１と第２のホースＨ２のそれぞれの端部が重ね合わされて第１の端部開口１ａ側にて異径ホースからなる二重構造Ｄ１が形成され、第３のホースＨ４と第４のホースＨ５のそれぞれの端部が重ね合わされて第２の端部開口１ｂ側にて異径ホースからなる二重構造Ｄ３が形成される。   Then, the respective ends of the first hose H1 and the second hose H2 are overlapped to form a double structure D1 composed of different diameter hoses on the first end opening 1a side, and the third hose H4. And the end of each of the fourth hoses H5 are overlapped to form a double structure D3 made of different diameter hoses on the second end opening 1b side.

このように、図示する異径ホース継手１０Ａによっても、１つの継手本体１Ａのみによって４つの異径ホースＨ１，Ｈ２，Ｈ３、Ｈ４を簡易に繋ぐことができ、しかも、継手本体１Ａの両端においてそれぞれ固有の二重構造Ｄ１，Ｄ３を形成して結露の発生を効果的に抑制することができる。   Thus, even with the illustrated different diameter hose joint 10A, it is possible to easily connect the four different diameter hoses H1, H2, H3, and H4 with only one joint body 1A, and at both ends of the joint body 1A. The unique double structures D1 and D3 can be formed to effectively suppress the occurrence of condensation.

（異径ホース継手の実施の形態３）
図６は異径ホース継手の実施の形態３と異径ホースの組み付け縦断面図である。 (Embodiment 3 of different diameter hose joint)
FIG. 6 is an assembled longitudinal cross-sectional view of the third embodiment of the different diameter hose joint and the different diameter hose.

図６で示すように、異径ホース継手１０Ｂは筒状の継手本体１Ｂから構成され、この継手本体１Ｂでは、ネジ溝を有する第１の固定部２および第２の固定部３Ｂ、テーパー面からなる第３の固定部５Ａが継手本体１Ｂの中空内に並んだ態様で形成されている。さらに、第１、第２のホースＨ１，Ｈ２が重ね合わされた態様で第１の固定部２と第２の固定部３Ｂにそれぞれ固定される関係上、継手本体１Ｂは拡径部を有していてこの拡径部の中空に第１の固定部２が形成され、この拡径部に連続する縮径部の中空に第２の固定部３Ｂと第３の固定部５Ａが形成されている。   As shown in FIG. 6, the different diameter hose joint 10B is composed of a tubular joint body 1B. In this joint body 1B, the first fixed portion 2 and the second fixed portion 3B having thread grooves are formed from a tapered surface. The 3rd fixed part 5A which becomes is formed in the aspect arranged in the hollow of the coupling main body 1B. Furthermore, the joint main body 1B has a diameter-expanded portion because the first and second hoses H1 and H2 are fixed to the first fixing portion 2 and the second fixing portion 3B, respectively, in an overlapped manner. A first fixing portion 2 is formed in the hollow of the enlarged diameter portion, and a second fixing portion 3B and a third fixing portion 5A are formed in the hollow of the reduced diameter portion continuous with the enlarged diameter portion.

第１の端部開口１ａ側では、異径ホースである第１、第２のホースＨ１，Ｈ２からなる二重構造Ｄ１が形成されている。   On the first end opening 1a side, a double structure D1 composed of first and second hoses H1 and H2 which are different diameter hoses is formed.

このように、図示する異径ホース継手１０Ｂによっても、１つの継手本体１Ｂのみによって３つの異径ホースＨ１，Ｈ２，Ｈ３を簡易に繋ぐことができ、しかも、継手本体１Ｂの一端において二重構造Ｄ１を形成して結露の発生を効果的に抑制することができる。   Thus, even with the illustrated different diameter hose joint 10B, the three different diameter hoses H1, H2, and H3 can be easily connected by only one joint body 1B, and a double structure is provided at one end of the joint body 1B. D1 can be formed to effectively suppress the occurrence of condensation.

以上、本発明の実施の形態を図面を用いて詳述してきたが、具体的な構成はこの実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における設計変更等があっても、それらは本発明に含まれるものである。   The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

１，１Ａ,１Ｂ…継手本体、１ａ…第１の端部開口、１ｂ…第２の端部開口、２…第１の固定部（第１の環状の凹溝）、２Ａ…第４の固定部（第２の環状の凹溝）、３…第２の固定部、４…第２の環状の凹溝、３Ａ，５…第３の固定部、１０，１０Ａ，１０Ｂ…異径ホース継手、２０…断熱材、Ｈ１…第１のホース、Ｈ２…第２のホース、Ｈ３，Ｈ４…第３のホース、Ｈ５…第４のホース、Ｄ１，Ｄ２，Ｄ３…二重構造、Ｔ…ウォールトップ、Ｗ…壁   DESCRIPTION OF SYMBOLS 1,1A, 1B ... Joint body, 1a ... 1st edge part opening, 1b ... 2nd edge part opening, 2 ... 1st fixing | fixed part (1st annular groove), 2A ... 4th fixation Part (second annular groove), 3 ... second fixing part, 4 ... second annular groove, 3A, 5 ... third fixing part, 10, 10A, 10B ... different diameter hose joint, 20 ... heat insulating material, H1 ... first hose, H2 ... second hose, H3, H4 ... third hose, H5 ... fourth hose, D1, D2, D3 ... double structure, T ... wall top, W ... wall

Claims (4)

２以上の異径のホースを繋ぐ、中空と該中空に連通する２つの端部開口（第１の端部開口と第２の端部開口）を有する異径ホース継手であって、
前記異径ホース継手は、
第１の端部開口から中空へ挿入される異径の第１のホースと第２のホースのそれぞれの端部が固定される第１の固定部と第２の固定部を備えており、
第２の端部開口から中空へ挿入される第３のホースの端部が固定される第３の固定部を第１の固定部および第２の固定部とは異なる位置に備えている異径ホース継手。 It is a different diameter hose joint that connects two or more different diameter hoses, and has a hollow and two end openings (first end opening and second end opening) communicating with the hollow,
The different diameter hose joint is
A first fixing portion and a second fixing portion to which the respective ends of the first and second hoses of different diameters inserted into the hollow from the first end opening are fixed;
Different diameters provided with a third fixing portion to which the end of the third hose inserted into the hollow from the second end opening is fixed at a position different from the first fixing portion and the second fixing portion. Hose fittings. 前記異径ホース継手は、
前記第１の端部開口を形成する端部の環状の肉厚内に第１の環状の凹溝を備え、該第１の環状の凹溝が第１の固定部となっており、
前記第２の端部開口を形成する端部の環状の肉厚内に第２の環状の凹溝を備えており、
第１の環状の凹溝からなる第１の固定部に第２のホースよりも大径の第１のホースの端部が固定され、その内側の中空の壁面に形成された第２の固定部に第２のホースの端部が固定されるようになっており、
第２の環状の凹溝に環状の断熱材が固定され、その内側の中空の壁面に形成された第３の固定部に第３のホースの端部が固定されるようになっており、
第１のホースと第２のホースのそれぞれの端部が重ね合わされて第１の端部開口側にて異径ホースからなる二重構造が形成され、
環状の断熱材と第３のホースの端部が重ね合わされて第２の端部開口側にて断熱材とホースからなる二重構造が形成される、請求項１に記載の異径ホース継手。 The different diameter hose joint is
A first annular groove is provided in the annular thickness of the end portion forming the first end opening, and the first annular groove is a first fixing portion,
A second annular groove is provided in the annular thickness of the end forming the second end opening;
The end of the first hose having a diameter larger than that of the second hose is fixed to the first fixing portion formed of the first annular groove, and the second fixing portion is formed on the hollow wall surface inside the first hose. The end of the second hose is fixed to
An annular heat insulating material is fixed to the second annular groove, and an end of the third hose is fixed to a third fixing portion formed on the inner hollow wall surface,
The end portions of the first hose and the second hose are overlapped to form a double structure consisting of different diameter hoses on the first end opening side,
The different diameter hose joint according to claim 1, wherein the annular heat insulating material and the end of the third hose are overlapped to form a double structure including the heat insulating material and the hose on the second end opening side. 前記異径ホース継手は、第２の端部開口から中空へ挿入される第３のホースとは別途の第４のホースの端部が固定される第４の固定部を、第１の固定部、第２の固定部および第３の固定部とは異なる位置に備えており、
前記第１の端部開口を形成する端部の環状の肉厚内に第１の環状の凹溝を備え、該第１の環状の凹溝が第１の固定部となっており、
前記第２の端部開口を形成する端部の環状の肉厚内に第２の環状の凹溝を備え、該第２の環状の凹溝が第４の固定部となっており、
第１の環状の凹溝からなる第１の固定部に第２のホースよりも大径の第１のホースの端部が固定され、その内側の中空の壁面に形成された第２の固定部に第２のホースの端部が固定されるようになっており、
第２の環状の凹溝からなる第４の固定部に第３のホースよりも大径の第４のホースの端部が固定され、その内側の中空の壁面に形成された第３の固定部に第３のホースの端部が固定されるようになっており、
第１のホースと第２のホースのそれぞれの端部が重ね合わされて第１の端部開口側にて異径ホースからなる二重構造が形成され、
第３のホースと第４のホースのそれぞれの端部が重ね合わされて第２の端部開口側にて異径ホースからなる二重構造が形成される、請求項１に記載の異径ホース継手。 The different diameter hose joint includes a first fixing portion, a fourth fixing portion to which an end of a fourth hose separate from the third hose inserted into the hollow from the second end opening is fixed. The second fixing portion and the third fixing portion are provided at different positions,
A first annular groove is provided in the annular thickness of the end portion forming the first end opening, and the first annular groove is a first fixing portion,
A second annular groove is provided in the annular thickness of the end portion forming the second end opening, and the second annular groove is a fourth fixing portion,
The end of the first hose having a diameter larger than that of the second hose is fixed to the first fixing portion formed of the first annular groove, and the second fixing portion is formed on the hollow wall surface inside the first hose. The end of the second hose is fixed to
The end of the fourth hose having a diameter larger than that of the third hose is fixed to the fourth fixing portion formed of the second annular groove, and the third fixing portion formed on the hollow wall surface inside the fourth hose The end of the third hose is fixed to
The end portions of the first hose and the second hose are overlapped to form a double structure consisting of different diameter hoses on the first end opening side,
2. The different diameter hose coupling according to claim 1, wherein the ends of the third hose and the fourth hose are overlapped to form a double structure including different diameter hoses on the second end opening side. . 前記異径ホース継手は、
中空の壁面において、第１の端部開口側から順に、第１の固定部、第２の固定部、第３の固定部が形成されており、
第１のホースと第２のホースのそれぞれの端部が重ね合わされて第１の端部開口側にて異径ホースからなる二重構造が形成される、請求項１に記載の異径ホース継手。 The different diameter hose joint is
In the hollow wall surface, the first fixing portion, the second fixing portion, and the third fixing portion are formed in order from the first end opening side,
The different diameter hose coupling according to claim 1, wherein the respective ends of the first hose and the second hose are overlapped to form a double structure composed of different diameter hoses on the first end opening side. .
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