JP2011153667A

JP2011153667A - Fluid pipe

Info

Publication number: JP2011153667A
Application number: JP2010015632A
Authority: JP
Inventors: Kazuyuki Hayakawa; 和行早川
Original assignee: Mirai Industry Co Ltd
Current assignee: Mirai Industry Co Ltd
Priority date: 2010-01-27
Filing date: 2010-01-27
Publication date: 2011-08-11
Anticipated expiration: 2030-01-27
Also published as: JP5367600B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid pipe that can be stably connected without making a connection part long. <P>SOLUTION: The fluid pipe 2 is formed by arranging a corrugated part 3 with the inside and outside continuously formed in irregular shapes along the longitudinal direction and a connection part 4 with a connecting object 1 inserted therein alternately in the longitudinal direction. The connection part 4 has two or more kinds of smooth parts 5, 5 having different inner diameters so as to correspond to outer diameters of two or more kinds of connecting objects 1, 1. The smallest smooth part 5a having the smallest inner diameter out of the smooth parts 5, 5 is positioned so as to be in line with the corrugated part 3. The part adjacent to the smallest smooth part 5a in the corrugated part 3 is formed in such a way that the inner diameter D31 of protruding part 3b of the inner surface is equal to the inner diameter D51 of the smallest smooth part 5a. The connecting object 1 that is inserted into the smallest smooth part 5a becomes an insertion margin 3a that is inserted following the smallest smooth part 5a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、波付部と接続部とが交互に並ぶ流体管に関するものである。 The present invention relates to a fluid pipe in which corrugated portions and connecting portions are alternately arranged.

従来、流体管として、可撓性を有する波付ホースがあった（例えば、特許文献１参照）。この波付ホースは、所定長さごとに平滑な周面を有する環状の凸状部が設けられていた。そこで、この波付ホースは、切断の際に、凸状部の一端部から切断することで、その凸状部側が、水道の蛇口等の接続対象に接続するための接続部となった。 Conventionally, there has been a corrugated hose having flexibility as a fluid pipe (see, for example, Patent Document 1). This corrugated hose was provided with an annular convex portion having a smooth peripheral surface for each predetermined length. Therefore, the corrugated hose is cut from one end of the convex portion at the time of cutting, so that the convex portion side becomes a connection portion for connecting to a connection target such as a water tap.

実公昭４３−１４９１４号公報Japanese Utility Model Publication No. 43-14914

ところで、前記従来の波付ホースにあっては、接続部は、安定した接続のために十分な長さを必要とし、その一方で、接続部が長いとホースの可撓性を損ねる虞があった。 By the way, in the conventional corrugated hose, the connecting portion needs a sufficient length for a stable connection. On the other hand, if the connecting portion is long, the flexibility of the hose may be impaired. It was.

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、接続部を長くすることなく、安定して接続することができる流体管を提供することにある。 The present invention has been made to solve the above-described conventional drawbacks, and an object of the present invention is to provide a fluid pipe that can be stably connected without lengthening the connecting portion. is there.

この発明に係る流体管は、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流体管は、長手方向に沿って内外が凹凸状に連続形成された波付部と、接続対象が挿入される接続部とが、前記長手方向に交互に並ぶ流体管である。ここで、前記接続部は、二種類以上の前記接続対象の外径に対応するように、内径の異なる二種類以上の平滑部を有し、かつ、それら平滑部が連続して並ぶ。そこで、前記接続部における前記平滑部のうちの一方側に位置する平滑部が第１平滑部となり、前記波付部における、前記第１平滑部と隣接する部分は、その内面の凸部の内径が前記第１平滑部の内径と等しく形成されて、前記第１平滑部に挿入される前記接続対象がその第１平滑部に続いて挿入される、挿し込み代となる。 In order to achieve the above object, the fluid pipe according to the present invention has the following configuration. That is,
In the fluid pipe according to the first aspect of the present invention, the corrugated portion in which the inside and the outside are continuously formed in an uneven shape along the longitudinal direction and the connecting portion into which the connection target is inserted are alternately arranged in the longitudinal direction. It is a fluid pipe. Here, the connection portion has two or more types of smooth portions having different inner diameters so as to correspond to the outer diameters of the two or more types of connection objects, and the smooth portions are continuously arranged. Therefore, the smoothing portion located on one side of the smoothing portion in the connecting portion is the first smoothing portion, and the portion adjacent to the first smoothing portion in the corrugated portion is the inner diameter of the convex portion on the inner surface. Is formed to be equal to the inner diameter of the first smoothing portion, and the connection object to be inserted into the first smoothing portion is inserted after the first smoothing portion.

この流体管によると、接続部は、二種類以上の接続対象の外径に対応するように、内径の異なる二種類以上の平滑部を有している。したがって、接続対象の外径に対応する内径の平滑部が端部に位置するように、流体管を切断することで、その平滑部が、目的の接続対象が挿入される挿入部となる。そして、この平滑部が第１平滑部の場合には、接続対象は、その第１平滑部に続いて、波付部における内面の凸部の内径が第１平滑部の内径と等しく形成された挿し込み代に挿入される。したがって、第１平滑部以外に、波付部における挿し込み代が、接続対象が挿入される挿入部となり、このため、第１平滑部、ひいては接続部を長くすることなく、この流体管を接続対象に安定して接続することができる。 According to this fluid pipe, the connection portion has two or more types of smooth portions having different inner diameters so as to correspond to two or more types of connection target outer diameters. Therefore, by cutting the fluid pipe so that the smooth portion with the inner diameter corresponding to the outer diameter of the connection target is located at the end, the smooth portion becomes the insertion portion into which the target connection target is inserted. And when this smooth part is the 1st smooth part, the inner diameter of the convex part of the inner surface in a corrugated part was formed equal to the inside diameter of the 1st smooth part following the 1st smooth part. Inserted into the insertion allowance. Therefore, in addition to the first smoothing part, the insertion allowance at the corrugated part becomes an insertion part into which the connection object is inserted. For this reason, the fluid pipe is connected without lengthening the first smoothing part and thus the connection part. It can be stably connected to the target.

また、請求項２に記載の発明に係る流体管は、請求項１に記載の流体管であって、前記接続部における前記平滑部のうちの他方側に位置する平滑部が第２平滑部となり、前記波付部における、前記第２平滑部と隣接する部分は、その内面の凸部の内径が前記第２平滑部の内径と等しく形成されて、前記第２平滑部に挿入される前記接続対象がその第２平滑部に続いて挿入される、他の挿し込み代となる。これにより、接続対象が挿入される平滑部が第２平滑部の場合には、接続対象は、その第２平滑部に続いて、波付部における内面の凸部の内径が第２平滑部の内径と等しく形成された他の挿し込み代に挿入される。したがって、第２平滑部以外に、波付部における他の挿し込み代が、接続対象が挿入される挿入部となり、このため、第２平滑部を長くすることなく、この流体管を接続対象に安定して接続することができる。また、こうして、第１平滑部に加えて第２平滑部を長くする必要がないことから、接続部の長さを確実に短くすることができる。 Moreover, the fluid pipe | tube which concerns on invention of Claim 2 is a fluid pipe | tube of Claim 1, Comprising: The smooth part located in the other side of the said smooth parts in the said connection part turns into a 2nd smooth part. The connection portion of the corrugated portion adjacent to the second smoothing portion is inserted into the second smoothing portion so that the inner diameter of the convex portion on the inner surface is equal to the inner diameter of the second smoothing portion. This is another insertion allowance in which the object is inserted following the second smoothing portion. Thus, when the smoothing portion into which the connection target is inserted is the second smoothing portion, the inner diameter of the convex portion of the inner surface of the corrugated portion is the second smoothing portion following the second smoothing portion. It is inserted into another insertion allowance formed equal to the inner diameter. Therefore, in addition to the second smoothing portion, another insertion allowance in the corrugated portion becomes an insertion portion into which the connection target is inserted. Therefore, this fluid pipe can be connected to the connection target without lengthening the second smoothing portion. A stable connection is possible. Moreover, since it is not necessary to lengthen the 2nd smoothing part in addition to the 1st smoothing part in this way, the length of a connection part can be shortened reliably.

また、請求項３に記載の発明に係る流体管は、請求項１に記載の流体管であって、前記波付部において前記挿し込み代を除いた部分の内面の凸部の内径は、前記挿し込み代の内面の凸部の内径よりも大きくなっている。このように、波付部において、挿し込み代を除いた部分の内面の凸部の内径を、挿し込み代の内面の凸部の内径よりも大きくすることで、波付部における流体の流れを円滑にすることができる。 A fluid pipe according to a third aspect of the present invention is the fluid pipe according to the first aspect, wherein the inner diameter of the convex portion of the inner surface of the corrugated portion excluding the insertion allowance is It is larger than the inner diameter of the convex portion on the inner surface of the insertion allowance. In this way, by making the inner diameter of the convex portion of the inner surface of the portion excluding the insertion allowance larger than the inner diameter of the convex portion of the inner surface of the insertion allowance, It can be smooth.

また、請求項４に記載の発明に係る流体管は、請求項１に記載の流体管であって、前記波付部において前記挿し込み代を除いた部分の内面の凸部の内径は、前記挿し込み代の内面の凸部の内径よりも小さくなっている。このように、波付部において、挿し込み代を除いた部分の内面の凸部の内径を、挿し込み代の内面の凸部の内径よりも小さくすることで、第１平滑部に続いてこの挿し込み代に挿入される接続対象の過剰な挿し込みを防ぐことができ、ひいては、波付部の可撓性を不必要に損なうことがない。 A fluid pipe according to a fourth aspect of the present invention is the fluid pipe according to the first aspect, wherein the inner diameter of the convex portion of the inner surface of the corrugated portion excluding the insertion allowance is It is smaller than the inner diameter of the convex portion on the inner surface of the insertion allowance. In this way, in the corrugated portion, the inner diameter of the convex portion on the inner surface of the portion excluding the insertion allowance is made smaller than the inner diameter of the convex portion on the inner surface of the insertion allowance, and this is followed by the first smoothing portion. It is possible to prevent excessive insertion of the connection target to be inserted in the insertion allowance, and as a result, the flexibility of the corrugated portion is not unnecessarily impaired.

この発明に係る流体管によれば、第１平滑部以外に、波付部における挿し込み代が、接続対象が挿入される挿入部となるため、第１平滑部、ひいては接続部を長くすることなく、この流体管を接続対象に安定して接続することができる。 According to the fluid pipe according to the present invention, since the insertion allowance in the corrugated part is an insertion part into which the connection target is inserted, in addition to the first smoothing part, the first smoothing part and thus the connection part is lengthened. In addition, the fluid pipe can be stably connected to the connection target.

この発明の第一の実施の形態の、流体管の一部破断正面図である。It is a partially broken front view of a fluid pipe of a first embodiment of this invention. 同じく、流体管の最小平滑部および挿し込み代に接続対象を挿入した状態を示す、一部破断正面図である。Similarly, it is a partially broken front view showing a state in which a connection object is inserted into the minimum smooth portion of the fluid pipe and the insertion allowance. 同じく、流体管の中間平滑部に接続対象を挿入した状態を示す、一部破断正面図である。Similarly, it is a partially broken front view showing a state where a connection object is inserted into an intermediate smooth portion of a fluid pipe. 同じく、流体管どうしを連結した状態を示す、一部破断正面図である。Similarly, it is a partially broken front view which shows the state which connected the fluid pipes. この発明の第二の実施の形態の、流体管の一部破断正面図である。It is a partially broken front view of a fluid pipe of a second embodiment of this invention. 同じく、流体管の最大平滑部および挿し込み代に接続対象を挿入した状態を示す、一部破断正面図である。Similarly, it is a partially broken front view showing a state in which a connection object is inserted into the maximum smooth portion of the fluid pipe and the insertion allowance. 同じく、流体管の中間平滑部に接続対象を挿入した状態を示す、一部破断正面図である。Similarly, it is a partially broken front view showing a state where a connection object is inserted into an intermediate smooth portion of a fluid pipe. 同じく、流体管どうしを連結した状態を示す、一部破断正面図である。Similarly, it is a partially broken front view which shows the state which connected the fluid pipes.

以下、この発明に係る流体管を実施するための形態を図面に基づいて説明する。 EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the fluid pipe | tube which concerns on this invention is demonstrated based on drawing.

図１〜図４は、本発明の第一の実施の形態を示す。図中符号１は、接続対象であって、例えばエアコン設備に設けられたドレン用の排水口等からなる。２は、流体管であって、例えばエアコン設備からのドレン（排水）を室外に排出するためのドレンホース等からなる。 1 to 4 show a first embodiment of the present invention. Reference numeral 1 in the figure is an object to be connected, and includes, for example, a drain outlet for drainage provided in an air conditioner facility. Reference numeral 2 denotes a fluid pipe, which includes, for example, a drain hose for discharging drain (drainage) from the air conditioner equipment to the outside of the room.

この流体管２は、長手方向に沿って内外が凹凸状に連続形成された波付部３と、前記接続対象１（詳細には、接続対象１における先端部分の被挿入部１ａ）が挿入される接続部４とが、前記長手方向に交互に並んで形成されている。ここで、接続部４は、二種類以上の接続対象１、１の外径に対応するように、内径の異なる二種類以上の平滑部５、５を有し、かつ、それら平滑部５、５が連続して並んでいる。そこで、接続部４における平滑部５、５のうちの一方側に位置する平滑部５が第１平滑部５１となり、波付部３における、第１平滑部５１と隣接する部分は、その内面の凸部３ｂの内径Ｄ３１が、第１平滑部５１の内径Ｄ５１と等しく形成されて、第１平滑部５１に挿入される接続対象１がその第１平滑部５１に続いて挿入される、挿し込み代３ａとなる。 The fluid pipe 2 is inserted with a corrugated part 3 continuously formed in a concave and convex shape along the longitudinal direction and the connection object 1 (specifically, the inserted part 1a at the tip of the connection object 1). Connecting portions 4 are formed alternately in the longitudinal direction. Here, the connection part 4 has two or more types of smoothing parts 5 and 5 having different inner diameters so as to correspond to the outer diameters of the two or more types of connection objects 1 and 1, and the smoothing parts 5 and 5. Are lined up continuously. Therefore, the smoothing part 5 located on one side of the smoothing parts 5 and 5 in the connecting part 4 becomes the first smoothing part 51, and the part adjacent to the first smoothing part 51 in the corrugated part 3 is on the inner surface thereof. Insertion in which the inner diameter D31 of the convex portion 3b is formed to be equal to the inner diameter D51 of the first smoothing portion 51, and the connection object 1 to be inserted into the first smoothing portion 51 is inserted following the first smoothing portion 51. It becomes generation 3a.

また、前記二種類以上の平滑部５、５において、第１平滑部５１は、他の平滑部５よりも前記長手方向に幅狭に形成されている。つまり、他の平滑部５は、この流体管２を接続対象１に安定して接続することができるだけの長さ（前記長手方向の幅）を有しているのに対し、第１平滑部５１は、この流体管２を接続対象１に安定して接続することができるだけの長さ（前記長手方向の幅）を有しておらず、それを補う意味で、前記挿し込み代３ａが設けられる。 In the two or more types of smoothing portions 5 and 5, the first smoothing portion 51 is formed narrower in the longitudinal direction than the other smoothing portions 5. That is, the other smoothing portion 5 has a length (width in the longitudinal direction) that can stably connect the fluid pipe 2 to the connection target 1, whereas the first smoothing portion 51. Does not have a length (width in the longitudinal direction) that allows the fluid pipe 2 to be stably connected to the connection target 1, and the insertion allowance 3a is provided in the sense of supplementing it. .

そして、波付部３において、挿し込み代３ａを除いた部分３ｃの内面の凸部３ｄの内径Ｄ３２は、挿し込み代３ａの内面の凸部３ｂの内径Ｄ３１よりも大きく形成されている。 In the corrugated portion 3, the inner diameter D32 of the convex portion 3d on the inner surface of the portion 3c excluding the insertion allowance 3a is formed larger than the inner diameter D31 of the convex portion 3b on the inner surface of the insertion allowance 3a.

具体的には、流体管２は、合成樹脂製であって、前記接続部４が、流体管２の長手方向に、例えば５０ｃｍピッチとか１ｍピッチで配置され、それら接続部４、４間が前記波付部３となっている。 Specifically, the fluid pipe 2 is made of synthetic resin, and the connection portions 4 are arranged in the longitudinal direction of the fluid pipe 2 at a pitch of 50 cm or 1 m, for example, and the connection portions 4, 4 are between the connection portions 4, 4. It is a wavy part 3.

接続部４は、三種類の接続対象１、１の外径に対応するように、内径の異なる三種類の平滑部５、５を有する。すなわち、三種類の平滑部５、５は、内径が最小となる最小平滑部５ａと、内径が中間の中間平滑部５ｂと、内径が最大となる最大平滑部５ｃとからなる。そして、接続部４において、最小平滑部５ａと最大平滑部５ｃとが両側にあって、波付部３、３と並ぶように位置し、中間平滑部５ｂが、最小平滑部５ａと最大平滑部５ｃとに挟まれるように位置する。つまり、図１において、左から右に向かって、内径が順に大きくなるように、最小平滑部５ａ、中間平滑部５ｂ、最大平滑部５ｃの順に並んでいる。そこで、ここにおける最小平滑部５ａが前記第１平滑部５１となる。 The connecting portion 4 has three types of smoothing portions 5 and 5 having different inner diameters so as to correspond to the outer diameters of the three types of connection objects 1 and 1. That is, the three types of smoothing portions 5 and 5 include a minimum smoothing portion 5a having a minimum inner diameter, an intermediate smoothing portion 5b having an intermediate inner diameter, and a maximum smoothing portion 5c having a maximum inner diameter. And in the connection part 4, the minimum smoothing part 5a and the maximum smoothing part 5c are located on both sides, and are located side by side with the wavy parts 3 and 3, and the intermediate smoothing part 5b is the minimum smoothing part 5a and the maximum smoothing part. 5c. That is, in FIG. 1, the minimum smoothing portion 5a, the intermediate smoothing portion 5b, and the maximum smoothing portion 5c are arranged in this order so that the inner diameters increase in order from left to right. Therefore, the minimum smoothing portion 5 a here becomes the first smoothing portion 51.

波付部３においては、最小平滑部５ａ（第１平滑部５１）に続く、内面の凸部３ｂ六個分が前記挿し込み代３ａとなり、その内面の凸部３ｂの内径Ｄ３１（つまりは、挿し込み代３ａの内径）が、前述したように第１平滑部５１となる最小平滑部５ａの内径Ｄ５１と等しく形成される。そして、波付部３において、挿し込み代３ａを除いた部分３ｃは、その内面の凸部３ｄの内径Ｄ３２（つまりは、挿し込み代３ａを除いた部分３ｃの内径）は、挿し込み代３ａの内面の凸部３ｂの内径Ｄ３１（つまりは、挿し込み代３ａの内径）より僅かに大きく形成される。ただし、図示実施の形態においては、波付部３における外面の凸部３ｅの外径Ｄ３３（つまりは、波付部３の外径）は、挿し込み代３ａと、挿し込み代３ａを除いた部分３ｃとで、同一に形成されている。 In the corrugated portion 3, the six convex portions 3b on the inner surface following the minimum smooth portion 5a (first smooth portion 51) serve as the insertion allowance 3a, and the inner diameter D31 of the convex portion 3b on the inner surface (that is, The inner diameter of the insertion allowance 3a) is formed to be equal to the inner diameter D51 of the minimum smoothing portion 5a that becomes the first smoothing portion 51 as described above. In the corrugated portion 3, the portion 3c excluding the insertion allowance 3a is the inner diameter D32 of the convex portion 3d on the inner surface (that is, the inner diameter of the portion 3c excluding the insertion allowance 3a) is the insertion allowance 3a. Is formed slightly larger than the inner diameter D31 (that is, the inner diameter of the insertion allowance 3a). However, in the illustrated embodiment, the outer diameter D33 of the convex portion 3e on the outer surface of the corrugated portion 3 (that is, the outer diameter of the corrugated portion 3) excludes the insertion allowance 3a and the insertion allowance 3a. The portion 3c is formed identically.

ここにおいて、図２は、最小平滑部５ａ（第１平滑部５１）および挿し込み代３ａに接続対象１（詳細には、被挿入部１ａ）が挿入されることで、この流体管２が接続対象１に接続された状態を示す。ここで、流体管２は、最小平滑部５ａおよび挿し込み代３ａが端部に位置するように、最小平滑部５ａにおける中間平滑部５ｂとの境界部分で切断されている。そして、被挿入部１ａは、接続対象１の先端部分において、径がしぼられるように段付形成されており、この被挿入部１ａが、最小平滑部５ａから挿し込み代３ａに渡って挿入される。 Here, FIG. 2 shows that the fluid pipe 2 is connected by inserting the connection object 1 (specifically, the inserted portion 1a) into the minimum smoothing portion 5a (first smoothing portion 51) and the insertion allowance 3a. The state connected to the object 1 is shown. Here, the fluid pipe 2 is cut at the boundary portion between the minimum smoothing portion 5a and the intermediate smoothing portion 5b so that the minimum smoothing portion 5a and the insertion allowance 3a are located at the ends. The inserted portion 1a is stepped so that the diameter is reduced at the tip of the connection target 1, and the inserted portion 1a is inserted over the insertion allowance 3a from the minimum smoothing portion 5a. The

また、図３は、中間平滑部５ｂに接続対象１（詳細には、被挿入部１ａ）が挿入されることで、この流体管２が接続対象１に接続された状態を示す。ここで、流体管２は、中間平滑部５ｂが端部に位置するように、中間平滑部５ｂのいずれか一方側（図示実施の形態においては、中間平滑部５ｂにおける最大平滑部５ｃとの境界部分）で切断される。また、図示を省略するが、流体管２は、最大平滑部５ｃが端部に位置するように、最大平滑部５ｃのいずれか一方側で切断されて、その最大平滑部５ｃに接続対象１が挿入されることで、この流体管２が接続対象１に接続されてもよい。 FIG. 3 shows a state in which the fluid pipe 2 is connected to the connection target 1 by inserting the connection target 1 (specifically, the inserted portion 1a) into the intermediate smoothing portion 5b. Here, the fluid pipe 2 has either one side of the intermediate smoothing part 5b (in the illustrated embodiment, the boundary with the maximum smoothing part 5c in the intermediate smoothing part 5b) so that the intermediate smoothing part 5b is located at the end. Part). Although not shown, the fluid pipe 2 is cut on either side of the maximum smoothing part 5c so that the maximum smoothing part 5c is located at the end, and the connection target 1 is connected to the maximum smoothing part 5c. The fluid pipe 2 may be connected to the connection target 1 by being inserted.

また、図４は、流体管２、２どうしが連結された状態を示す。ここで、一方の流体管２（左側の流体管２）は、中間平滑部５ｂが端部に位置するように、その中間平滑部５ｂにおける最大平滑部５ｃとの境界部分で切断される。そして、もう一方の流体管２（右側の流体管２）は、最大平滑部５ｃが端部に位置するように、その最大平滑部５ｃにおける中間平滑部５ｂとの境界部分で切断される。そこで、一方の流体管２の中間平滑部５ｂがもう一方の流体管２の最大平滑部５ｃに挿入されることで、これら流体管２、２は、連結される。このとき、中間平滑部５ｂの外周面には、被係止部としての突起４ａが形成されており、最大平滑部５ｃの内周面には、その突起４ａが係合する、係止部としての溝４ｂが形成されている。こうして、突起４ａが溝４ｂに係合することで、突起４ａは、溝４ｂに係止され、一方の流体管２は、もう一方の流体管２に対して抜け止めされる。そして、このように、流体管２、２どうしを連結することができることから、流体管２の長さが足りない場合であっても、その流体管２を他の流体管２と連結して有効に利用することができる。なお、図示実施の形態においては、中間平滑部５ｂの外径Ｄ５ｂは、最大平滑部５ｃの内径Ｄ５ｃよりも若干大きく形成されており、中間平滑部５ｂは、最大平滑部５ｃに圧入されるようにして挿入される。 FIG. 4 shows a state in which the fluid pipes 2 and 2 are connected to each other. Here, one fluid pipe 2 (the left fluid pipe 2) is cut at a boundary portion between the intermediate smoothing portion 5b and the maximum smoothing portion 5c so that the intermediate smoothing portion 5b is located at the end. The other fluid pipe 2 (the right fluid pipe 2) is cut at a boundary portion between the maximum smoothing portion 5c and the intermediate smoothing portion 5b so that the maximum smoothing portion 5c is located at the end. Therefore, the intermediate smoothing part 5b of one fluid pipe 2 is inserted into the maximum smoothing part 5c of the other fluid pipe 2, whereby the fluid pipes 2 and 2 are connected. At this time, a protrusion 4a as a locked portion is formed on the outer peripheral surface of the intermediate smoothing portion 5b, and the locking portion with which the protrusion 4a engages with the inner peripheral surface of the maximum smoothing portion 5c. The groove 4b is formed. Thus, the protrusion 4a is engaged with the groove 4b, whereby the protrusion 4a is locked to the groove 4b, and one fluid pipe 2 is prevented from coming off with respect to the other fluid pipe 2. Since the fluid pipes 2 and 2 can be connected to each other in this way, even if the length of the fluid pipe 2 is insufficient, the fluid pipe 2 is effectively connected to another fluid pipe 2. Can be used. In the illustrated embodiment, the outer diameter D5b of the intermediate smoothing portion 5b is formed slightly larger than the inner diameter D5c of the maximum smoothing portion 5c, and the intermediate smoothing portion 5b is press-fitted into the maximum smoothing portion 5c. Is inserted.

次に、この第一の実施の形態における流体管２の作用効果について説明する。この流体管２によると、接続部４は、二種類以上（図示実施の形態においては、三種類）の接続対象１、１の外径に対応するように、内径の異なる二種類以上（図示実施の形態においては、三種類）の平滑部５（５ａ、５ｂ、５ｃ）を有している。したがって、接続対象１の外径に対応する内径の平滑部５が端部に位置するように、流体管２を切断することで、その平滑部５が、目的の接続対象１（詳細には、被挿入部１ａ）が挿入される挿入部となる。そして、この平滑部５が最小平滑部５ａ（第１平滑部５１）の場合には、接続対象１は、その最小平滑部５ａ（第１平滑部５１）に続いて、波付部３における内面の凸部３ｂの内径Ｄ３１が最小平滑部５ａ（第１平滑部５１）の内径Ｄ５１と等しく形成された挿し込み代３ａに挿入される。したがって、最小平滑部５ａ（第１平滑部５１）以外に、波付部３における挿し込み代３ａが、接続対象１（詳細には、被挿入部１ａ）が挿入される挿入部となる。このため、最小平滑部５ａ（第１平滑部５１）、ひいては接続部４を長くすることなく、この流体管２を接続対象１に安定して接続することができる。 Next, the effect of the fluid pipe | tube 2 in this 1st embodiment is demonstrated. According to this fluid pipe 2, the connecting portion 4 has two or more types (in the illustrated embodiment) having different inner diameters so as to correspond to the outer diameters of the two or more (three types in the illustrated embodiment) connection objects 1 and 1. In the embodiment, three types of smoothing portions 5 (5a, 5b, 5c) are provided. Therefore, by cutting the fluid pipe 2 so that the smoothing portion 5 having an inner diameter corresponding to the outer diameter of the connection target 1 is located at the end, the smoothing portion 5 becomes the target connection target 1 (in detail, The inserted portion 1a) becomes an insertion portion to be inserted. And when this smoothing part 5 is the minimum smoothing part 5a (1st smoothing part 51), the connection object 1 is the inner surface in the corrugated part 3 following the minimum smoothing part 5a (1st smoothing part 51). An inner diameter D31 of the convex portion 3b is inserted into an insertion margin 3a formed to be equal to the inner diameter D51 of the minimum smoothing portion 5a (first smoothing portion 51). Therefore, in addition to the minimum smoothing portion 5a (first smoothing portion 51), the insertion allowance 3a in the corrugated portion 3 becomes an insertion portion into which the connection target 1 (specifically, the inserted portion 1a) is inserted. For this reason, this fluid pipe | tube 2 can be stably connected to the connection object 1 without lengthening the minimum smoothing part 5a (1st smoothing part 51), and by extension, the connection part 4. FIG.

また、接続部４における最小平滑部５ａ（第１平滑部５１）を、他の平滑部５（５ｂ、５ｃ）よりも長手方向に幅狭に形成することで、接続部４の長さを短くすることができる。そして、接続部４の長さを短くすることで、相対的に波付部３の長さを長くすることができ、これにより、この流体管２の、波付部３による可撓性を向上させることができる。 Moreover, the length of the connection part 4 is shortened by forming the minimum smooth part 5a (first smooth part 51) in the connection part 4 narrower in the longitudinal direction than the other smooth parts 5 (5b, 5c). can do. And by shortening the length of the connection part 4, the length of the corrugated part 3 can be relatively lengthened, thereby improving the flexibility of the fluid pipe 2 by the corrugated part 3. Can be made.

また、波付部３において、挿し込み代３ａを除いた部分３ｃの内面の凸部３ｄの内径Ｄ３２を、挿し込み代３ａの内面の凸部３ｂの内径Ｄ３１よりも大きく形成することで、波付部３における流体の流れを円滑にすることができる。 Further, in the corrugated portion 3, the inner diameter D32 of the convex portion 3d on the inner surface of the portion 3c excluding the insertion allowance 3a is formed larger than the inner diameter D31 of the convex portion 3b on the inner surface of the insertion allowance 3a. The flow of fluid in the appendage 3 can be made smooth.

また、挿し込み代３ａの長さは、接続対象１における被挿入部１ａの長さ以上となっており、最小平滑部５ａ（第１平滑部５１）をその中間位置で切断した場合であっても、被挿入部１ａの全体を、最小平滑部５ａと挿し込み代３ａとに挿入することができる。 Further, the length of the insertion allowance 3a is equal to or longer than the length of the inserted portion 1a in the connection target 1, and the minimum smoothing portion 5a (first smoothing portion 51) is cut at the intermediate position. In addition, the entire inserted portion 1a can be inserted into the minimum smoothing portion 5a and the insertion allowance 3a.

図５〜図８は、本発明の第二の実施の形態を示す。この実施の形態は、第一の実施の形態と比較すると、流体管２の波付部３における挿し込み代３ａが、最小平滑部５ａ側ではなく、最大平滑部５ｃ側に位置する、つまり最大平滑部５ｃが第１平滑部５１となるが、他はほぼ同様であり、以下に、同様の部位には同一の符号を付して説明する。 5 to 8 show a second embodiment of the present invention. In this embodiment, compared with the first embodiment, the insertion allowance 3a in the corrugated portion 3 of the fluid pipe 2 is located not on the minimum smoothing portion 5a side but on the maximum smoothing portion 5c side. Although the smoothing part 5c becomes the 1st smoothing part 51, others are substantially the same, and below, the same code | symbol is attached | subjected and demonstrated to the same site | part.

接続対象１は、第一の実施の形態と同様に、例えばエアコン設備に設けられたドレン用の排水口等からなる。そして、流体管２もまた、第一の実施の形態と同様に、例えばエアコン設備からのドレン（排水）を室外に排出するためのドレンホース等からなる。 Similar to the first embodiment, the connection target 1 is composed of, for example, a drain outlet provided in an air conditioner facility. The fluid pipe 2 is also composed of, for example, a drain hose for discharging drain (drainage) from the air conditioner equipment to the outside, for example, as in the first embodiment.

この流体管２は、長手方向に沿って内外が凹凸状に連続形成された波付部３と、接続対象１（詳細には、接続対象１における先端部分の被挿入部１ａ）が挿入される接続部４とが、前記長手方向に交互に並んで形成されている。ここで、接続部４は、二種類以上の接続対象１、１の外径に対応するように、内径の異なる二種類以上の平滑部５、５を有し、かつ、それら平滑部５、５が連続して並んでいる。そこで、接続部４における平滑部５、５のうちの一方側に位置する平滑部５が第１平滑部５１となり、波付部３における、第１平滑部５１と隣接する部分は、その内面の凸部３ｂの内径Ｄ３１が、第１平滑部５ｃの内径Ｄ５１と等しく形成されて、第１平滑部５１に挿入される接続対象１がその第１平滑部５ｃに続いて挿入される、挿し込み代３ａとなる。 The fluid pipe 2 is inserted with a corrugated portion 3 in which the inside and the outside are continuously formed in an uneven shape along the longitudinal direction, and a connection target 1 (specifically, a portion to be inserted 1a at the tip of the connection target 1). Connection portions 4 are formed alternately in the longitudinal direction. Here, the connecting portion 4 has two or more types of smoothing portions 5 and 5 having different inner diameters so as to correspond to the outer diameters of two or more types of connection objects 1 and 1, and the smoothing portions 5 and 5. Are lined up continuously. Therefore, the smoothing part 5 located on one side of the smoothing parts 5 and 5 in the connecting part 4 becomes the first smoothing part 51, and the part adjacent to the first smoothing part 51 in the corrugated part 3 is on the inner surface thereof. Insertion in which the inner diameter D31 of the convex portion 3b is formed to be equal to the inner diameter D51 of the first smoothing portion 5c, and the connection object 1 inserted into the first smoothing portion 51 is inserted following the first smoothing portion 5c. It becomes generation 3a.

そして、波付部３において、挿し込み代３ａを除いた部分３ｃの内面の凸部３ｄの内径Ｄ３２は、挿し込み代３ａの内面の凸部３ｂの内径Ｄ３１よりも小さく形成されている。 In the corrugated portion 3, the inner diameter D32 of the convex portion 3d on the inner surface of the portion 3c excluding the insertion allowance 3a is formed smaller than the inner diameter D31 of the convex portion 3b on the inner surface of the insertion allowance 3a.

接続部４は、三種類の接続対象１、１の外径に対応するように、内径の異なる三種類の平滑部５、５を有する。すなわち、三種類の平滑部５、５は、内径が最小となる最小平滑部５ａと、内径が中間の中間平滑部５ｂと、内径が最大となる最大平滑部５ｃとからなる。そして、接続部４において、最小平滑部５ａと最大平滑部５ｃとが両側にあって、波付部３、３と並ぶように位置し、中間平滑部５ｂが、最小平滑部５ａと最大平滑部５ｃとに挟まれるように位置する。つまり、図５において、右から左に向かって、内径が順に大きくなるように、最小平滑部５ａ、中間平滑部５ｂ、最大平滑部５ｃの順に並んでいる。そこで、ここにおける最大平滑部５ｃが前記第１平滑部５１となる。 The connecting portion 4 has three types of smoothing portions 5 and 5 having different inner diameters so as to correspond to the outer diameters of the three types of connection objects 1 and 1. That is, the three types of smoothing portions 5 and 5 include a minimum smoothing portion 5a having a minimum inner diameter, an intermediate smoothing portion 5b having an intermediate inner diameter, and a maximum smoothing portion 5c having a maximum inner diameter. And in the connection part 4, the minimum smoothing part 5a and the maximum smoothing part 5c are located on both sides, and are located side by side with the wavy parts 3 and 3, and the intermediate smoothing part 5b is the minimum smoothing part 5a and the maximum smoothing part. 5c. That is, in FIG. 5, the minimum smoothing portion 5a, the intermediate smoothing portion 5b, and the maximum smoothing portion 5c are arranged in this order so that the inner diameters increase in order from right to left. Therefore, the maximum smoothing portion 5 c here becomes the first smoothing portion 51.

波付部３においては、最大平滑部５ｃ（第１平滑部５１）に続く、内面の凸部３ｂ六個分が前記挿し込み代３ａとなり、その内面の凸部３ｂの内径Ｄ３１（つまりは、挿し込み代３ａの内径）が、前述したように第１平滑部５１となる最大平滑部５ｃの内径Ｄ５１と等しく形成される。そして、波付部３において、挿し込み代３ａを除いた部分３ｃは、その内面の凸部３ｄの内径Ｄ３２（つまりは、挿し込み代３ａを除いた部分３ｃの内径）は、挿し込み代３ａの内面の凸部３ｂの内径Ｄ３１（つまりは、挿し込み代３ａの内径）より若干小さく形成される。ただし、図示実施の形態においては、波付部３における外面の凸部３ｅの外径Ｄ３３（つまりは、波付部３の外径）は、挿し込み代３ａと、挿し込み代３ａを除いた部分３ｃとで、同一に形成されている。 In the corrugated portion 3, the six convex portions 3b on the inner surface following the maximum smoothing portion 5c (first smoothing portion 51) serve as the insertion allowance 3a, and the inner diameter D31 (that is, the convex portion 3b on the inner surface) The inner diameter of the insertion allowance 3a) is formed to be equal to the inner diameter D51 of the maximum smoothing portion 5c that becomes the first smoothing portion 51 as described above. In the corrugated portion 3, the portion 3c excluding the insertion allowance 3a is the inner diameter D32 of the convex portion 3d on the inner surface (that is, the inner diameter of the portion 3c excluding the insertion allowance 3a) is the insertion allowance 3a. Is formed slightly smaller than the inner diameter D31 (that is, the inner diameter of the insertion allowance 3a). However, in the illustrated embodiment, the outer diameter D33 of the convex portion 3e on the outer surface of the corrugated portion 3 (that is, the outer diameter of the corrugated portion 3) excludes the insertion allowance 3a and the insertion allowance 3a. The portion 3c is formed identically.

ここにおいて、図６は、最大平滑部５ｃ（第１平滑部５１）および挿し込み代３ａに接続対象１（詳細には、被挿入部１ａ）が挿入されることで、この流体管２が接続対象１に接続された状態を示す。ここで、流体管２は、最大平滑部５ｃおよび挿し込み代３ａが端部に位置するように、最大平滑部５ｃにおける中間平滑部５ｂとの境界部分で切断されている。そして、被挿入部１ａは、接続対象１の先端部分において、径がしぼられるように段付形成されており、この被挿入部１ａが、最大平滑部５ｃから挿し込み代３ａに渡って挿入される。 Here, FIG. 6 shows that the fluid pipe 2 is connected by inserting the connection object 1 (specifically, the inserted portion 1a) into the maximum smoothing portion 5c (first smoothing portion 51) and the insertion allowance 3a. The state connected to the object 1 is shown. Here, the fluid pipe 2 is cut at a boundary portion between the maximum smoothing portion 5c and the intermediate smoothing portion 5b so that the maximum smoothing portion 5c and the insertion allowance 3a are located at the end portions. The inserted portion 1a is stepped so that the diameter is reduced at the tip of the connection target 1, and the inserted portion 1a is inserted from the maximum smoothing portion 5c over the insertion allowance 3a. The

また、図７は、中間平滑部５ｂに接続対象１（詳細には、被挿入部１ａ）が挿入されることで、この流体管２が接続対象１に接続された状態を示す。ここで、流体管２は、中間平滑部５ｂが端部に位置するように、中間平滑部５ｂのいずれか一方側（図示実施の形態においては、中間平滑部５ｂにおける最小平滑部５ａとの境界部分）で切断される。また、図示を省略するが、流体管２は、最小平滑部５ａが端部に位置するように、最小平滑部５ａのいずれか一方側で切断されて、その最小平滑部５ａに接続対象１が挿入されることで、この流体管２が接続対象１に接続されてもよい。 FIG. 7 shows a state in which the fluid pipe 2 is connected to the connection target 1 by inserting the connection target 1 (specifically, the inserted portion 1a) into the intermediate smoothing portion 5b. Here, the fluid pipe 2 has either one side of the intermediate smoothing part 5b (in the illustrated embodiment, the boundary with the minimum smoothing part 5a in the intermediate smoothing part 5b) so that the intermediate smoothing part 5b is located at the end. Part). Although not shown, the fluid pipe 2 is cut on either side of the minimum smoothing part 5a so that the minimum smoothing part 5a is located at the end, and the connection target 1 is connected to the minimum smoothing part 5a. The fluid pipe 2 may be connected to the connection target 1 by being inserted.

また、図８は、流体管２、２どうしが連結された状態を示す。ここで、一方の流体管２（右側の流体管２）は、中間平滑部５ｂが端部に位置するように、その中間平滑部５ｂにおける最大平滑部５ｃとの境界部分で切断される。そして、もう一方の流体管２（左側の流体管２）は、最大平滑部５ｃが端部に位置するように、その最大平滑部５ｃにおける中間平滑部５ｂとの境界部分で切断される。そこで、一方の流体管２の中間平滑部５ｂがもう一方の流体管２の最大平滑部５ｃ（図示実施の形態においては、最大平滑部５ｃおよび挿し込み代３ａ）に挿入されることで、これら流体管２、２は、連結される。このとき、中間平滑部５ｂの外周面には、被係止部としての突起４ａが形成されており、最大平滑部５ｃの内周面には、その突起４ａが係合する、係止部としての溝４ｂが形成されている。こうして、突起４ａが溝４ｂに係合することで、突起４ａは、溝４ｂに係止され、一方の流体管２は、もう一方の流体管２に対して抜け止めされる。そして、このように、流体管２、２どうしを連結することができることから、流体管２の長さが足りない場合であっても、その流体管２を他の流体管２と連結して有効に利用することができる。なお、図示実施の形態においては、中間平滑部５ｂの外径Ｄ５ｂは、最大平滑部５ｃ（第１平滑部５１）の内径Ｄ５１および挿し込み代３ａの内面の凸部３ｂの内径Ｄ３１よりも若干大きく形成されており、中間平滑部５ｂは、最大平滑部５ｃ（図示実施の形態においては、最大平滑部５ｃおよび挿し込み代３ａ）に圧入されるようにして挿入される。 FIG. 8 shows a state where the fluid pipes 2 and 2 are connected to each other. Here, one fluid pipe 2 (the right fluid pipe 2) is cut at a boundary portion between the intermediate smoothing portion 5b and the maximum smoothing portion 5c so that the intermediate smoothing portion 5b is located at the end. Then, the other fluid pipe 2 (the left fluid pipe 2) is cut at a boundary portion between the maximum smoothing portion 5c and the intermediate smoothing portion 5b so that the maximum smoothing portion 5c is located at the end. Therefore, the intermediate smoothing part 5b of one fluid pipe 2 is inserted into the maximum smoothing part 5c (in the illustrated embodiment, the maximum smoothing part 5c and the insertion allowance 3a) of the other fluid pipe 2, The fluid pipes 2 and 2 are connected. At this time, a protrusion 4a as a locked portion is formed on the outer peripheral surface of the intermediate smoothing portion 5b, and the locking portion with which the protrusion 4a engages with the inner peripheral surface of the maximum smoothing portion 5c. The groove 4b is formed. Thus, the protrusion 4a is engaged with the groove 4b, whereby the protrusion 4a is locked to the groove 4b, and one fluid pipe 2 is prevented from coming off with respect to the other fluid pipe 2. Since the fluid pipes 2 and 2 can be connected to each other in this way, even if the length of the fluid pipe 2 is insufficient, the fluid pipe 2 is effectively connected to another fluid pipe 2. Can be used. In the illustrated embodiment, the outer diameter D5b of the intermediate smoothing portion 5b is slightly larger than the inner diameter D51 of the maximum smoothing portion 5c (first smoothing portion 51) and the inner diameter D31 of the convex portion 3b on the inner surface of the insertion allowance 3a. The intermediate smoothing portion 5b is inserted so as to be press-fitted into the maximum smoothing portion 5c (in the illustrated embodiment, the maximum smoothing portion 5c and the insertion allowance 3a).

次に、この第二の実施の形態における流体管２の作用効果について説明する。この流体管２によると、接続部４は、二種類以上（図示実施の形態においては、三種類）の接続対象１、１の外径に対応するように、内径の異なる二種類以上（図示実施の形態においては、三種類）の平滑部５（５ａ、５ｂ、５ｃ）を有している。したがって、接続対象１の外径に対応する内径の平滑部５が端部に位置するように、流体管２を切断することで、その平滑部５が、目的の接続対象１（詳細には、被挿入部１ａ）が挿入される挿入部となる。そして、この平滑部５が最大平滑部５ｃ（第１平滑部５１）の場合には、接続対象１は、その最大平滑部５ｃ（第１平滑部５１）に続いて、波付部３における内面の凸部３ｂの内径Ｄ３１が最大平滑部５ｃ（第１平滑部５１）の内径Ｄ５１と等しく形成された挿し込み代３ａに挿入される。したがって、最大平滑部５ｃ（第１平滑部５１）以外に、波付部３における挿し込み代３ａが、接続対象１（詳細には、被挿入部１ａ）が挿入される挿入部となる。このため、最大平滑部５ｃ（第１平滑部５１）、ひいては接続部４を長くすることなく、この流体管２を接続対象１に安定して接続することができる。 Next, the effect of the fluid pipe | tube 2 in this 2nd embodiment is demonstrated. According to this fluid pipe 2, the connecting portion 4 has two or more types (in the illustrated embodiment) having different inner diameters so as to correspond to the outer diameters of the two or more (three types in the illustrated embodiment) connection objects 1 and 1. In the embodiment, three types of smoothing portions 5 (5a, 5b, 5c) are provided. Therefore, by cutting the fluid pipe 2 so that the smoothing portion 5 having an inner diameter corresponding to the outer diameter of the connection target 1 is located at the end, the smoothing portion 5 becomes the target connection target 1 (in detail, The inserted portion 1a) becomes an insertion portion to be inserted. And when this smoothing part 5 is the maximum smoothing part 5c (1st smoothing part 51), the connection object 1 is the inner surface in the corrugated part 3 following the maximum smoothing part 5c (1st smoothing part 51). An inner diameter D31 of the convex portion 3b is inserted into an insertion margin 3a formed to be equal to the inner diameter D51 of the maximum smoothing portion 5c (first smoothing portion 51). Therefore, in addition to the maximum smoothing portion 5c (first smoothing portion 51), the insertion allowance 3a in the corrugated portion 3 becomes an insertion portion into which the connection target 1 (specifically, the inserted portion 1a) is inserted. For this reason, this fluid pipe | tube 2 can be stably connected to the connection object 1 without lengthening the maximum smoothing part 5c (1st smoothing part 51), and by extension, the connection part 4. FIG.

また、接続部４における最大平滑部５ｃ（第１平滑部５１）を、他の平滑部５（５ａ、５ｂ）よりも長手方向に幅狭に形成することで、接続部４の長さを短くすることができる。そして、接続部４の長さを短くすることで、相対的に波付部３の長さを長くすることができ、これにより、この流体管２の、波付部３による可撓性を向上させることができる。 Moreover, the length of the connection part 4 is shortened by forming the maximum smooth part 5c (first smooth part 51) in the connection part 4 narrower in the longitudinal direction than the other smooth parts 5 (5a, 5b). can do. And by shortening the length of the connection part 4, the length of the corrugated part 3 can be relatively lengthened, thereby improving the flexibility of the fluid pipe 2 by the corrugated part 3. Can be made.

また、波付部３において、挿し込み代３ａを除いた部分３ｃの内面の凸部３ｄの内径Ｄ３２を、挿し込み代３ａの内面の凸部３ｂの内径Ｄ３１よりも小さく形成することで、最大平滑部５ｃ（第１平滑部５１）に続いてこの挿し込み代３ａに挿入される接続対象１（例えば段が設けられず真っ直ぐ形成されているような接続対象）の過剰な挿し込みを防ぐことができ、ひいては、波付部３の可撓性を不必要に損なうことがない。 Further, in the corrugated portion 3, the inner diameter D32 of the convex portion 3d on the inner surface of the portion 3c excluding the insertion allowance 3a is formed smaller than the inner diameter D31 of the convex portion 3b on the inner surface of the insertion allowance 3a. To prevent excessive insertion of the connection target 1 (for example, a connection target that is formed straight without a step) inserted into the insertion allowance 3a following the smoothing unit 5c (first smoothing unit 51). As a result, the flexibility of the corrugated part 3 is not unnecessarily impaired.

また、挿し込み代３ａの長さは、接続対象１における被挿入部１ａの長さ以上となっており、最大平滑部５ｃ（第１平滑部５１）をその中間位置で切断した場合であっても、被挿入部１ａの全体を、最大平滑部５ｃと挿し込み代３ａとに挿入することができる。 Further, the length of the insertion allowance 3a is equal to or longer than the length of the inserted portion 1a in the connection target 1, and the maximum smoothing portion 5c (first smoothing portion 51) is cut at the intermediate position. In addition, the entire inserted portion 1a can be inserted into the maximum smoothing portion 5c and the insertion allowance 3a.

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、流体管２は、エアコン設備の排水を排出するドレンホースに限らず、蒸気を用いる機械においてその蒸気が凝結した水を排出するドレーンホースであってもよく、さらには、ドレーンホースでなくとも、広く流体が通るものであれば、どのようなものでもよい。 In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, the fluid pipe 2 is not limited to the drain hose that discharges the waste water of the air conditioner equipment, but may be a drain hose that discharges water condensed by the steam in a machine using steam, and may not be a drain hose. Any material can be used as long as the fluid can pass through widely.

また、流体管２の波付部３は、長手方向に沿って内外が凹凸状に連続形成されるものであればよく、リングからなる凸状部と凹状部が長手方向に並ぶものに限らず、凸状部と凹状部が螺旋を描いて形成されるものでもよい。 Further, the corrugated portion 3 of the fluid pipe 2 is not limited to the one in which the inner and outer portions are continuously formed in an uneven shape along the longitudinal direction, and the convex portion and the concave portion formed of a ring are not limited to be arranged in the longitudinal direction. The convex portion and the concave portion may be formed by drawing a spiral.

また、接続部４は、三種類の接続対象１、１の外形に対応するように、内径の異なる三種類の平滑部５、５を有するが、二種類の接続対象１、１の外形に対応するように、内径の異なる二種類の平滑部５、５を有してもよく、また、四種類以上の接続対象１、１の外形に対応するように、内径の異なる四種類以上の平滑部４、４を有してもよい。また、これら平滑部５、５の並び順は、特に限定されず、例えば、中間平滑部５ｂが、接続部４の一方側に設けられても構わない。また、これら二種類以上の平滑部５、５のうちの、一種類あるいは複数種類の平滑部５は、接続部４において、複数の位置に配置されてもよい。つまり、一つの接続部４につき、同一の内径を有する平滑部５が、複数設けられても構わない。 Moreover, although the connection part 4 has the three types of smoothing parts 5 and 5 from which an internal diameter differs so that it may respond | correspond to the external shape of three types of connection object 1 and 1, it respond | corresponds to the external shape of two types of connection object 1 As described above, two types of smoothing portions 5 and 5 having different inner diameters may be provided, and four or more types of smoothing portions having different inner diameters may be provided so as to correspond to the outer shapes of four or more types of connection objects 1 and 1. 4, 4 may be included. Further, the arrangement order of the smoothing portions 5 and 5 is not particularly limited, and for example, the intermediate smoothing portion 5 b may be provided on one side of the connection portion 4. In addition, one or more of the two or more types of smoothing units 5 and 5 may be arranged at a plurality of positions in the connection unit 4. That is, a plurality of smoothing portions 5 having the same inner diameter may be provided for one connection portion 4.

また、第１の実施の形態において、波付部３における外面の凸部３ｅの外径Ｄ３３（つまりは、波付部３の外径）は、挿し込み代３ａと、挿し込み代３ａを除いた部分３ｃとで、同一に形成されなくとも、例えば、挿し込み代３ａを除いた部分３ｃの外径が、挿し込み代３ａの外径よりも径大に形成されてもよい。同様に、第２の実施の形態においても、波付部３における外面の凸部３ｅの外径Ｄ３３（つまりは、波付部３の外径）は、挿し込み代３ａと、挿し込み代３ａを除いた部分３ｃとで、同一に形成される必要はなく、例えば、挿し込み代３ａを除いた部分３ｃの外径が、挿し込み代３ａの外径よりも径小に形成されてもよい。 In the first embodiment, the outer diameter D33 of the convex portion 3e on the outer surface of the corrugated portion 3 (that is, the outer diameter of the corrugated portion 3) is the same as the insertion allowance 3a and the insertion allowance 3a. For example, the outer diameter of the portion 3c excluding the insertion allowance 3a may be larger than the outer diameter of the insertion allowance 3a, even though the portion 3c is not formed identically. Similarly, also in the second embodiment, the outer diameter D33 of the convex portion 3e on the outer surface of the wavy portion 3 (that is, the outer diameter of the wavy portion 3) is the insertion allowance 3a and the insertion allowance 3a. For example, the outer diameter of the portion 3c excluding the insertion allowance 3a may be smaller than the outer diameter of the insertion allowance 3a. .

また、第一の実施の形態において、接続部４における平滑部５のうちの一方側に位置する最小平滑部５ａが第１平滑部５１となり、波付部３における、最小平滑部５ａ（第１平滑部５１）と隣接する部分は、その内面の凸部３ｂの内径Ｄ３１が最小平滑部５ａの内径Ｄ５１と等しく形成されて、最小平滑部５ａに挿入される接続対象１がその最小平滑部５ａに続いて挿入される、挿し込み代３ａとなっているが、これに加えて、接続部４における平滑部５、５のうちの他方側に位置する平滑部５、つまり最大平滑部５ｃが第２平滑部となり、波付部３における、最大平滑部５ｃ（第２平滑部）と隣接する部分は、その内面の凸部の内径が最大平滑部５ｃの内径Ｄ５ｃと等しく形成されて、最大平滑部５ｃに挿入される接続対象１がその最大平滑部５ｃに続いて挿入される、他の挿し込み代となってもよい。これにより、接続対象１が挿入される平滑部５が最大平滑部５ｃ（第２平滑部）の場合には、接続対象１は、その最大平滑部５ｃに続いて、波付部３における内面の凸部の内径が最大平滑部５ｃの内径Ｄ５ｃと等しく形成された他の挿し込み代に挿入される。したがって、最大平滑部５ｃ（第２平滑部）以外に、波付部３における他の挿し込み代が、接続対象１が挿入される挿入部となり、このため、最大平滑部５ｃを長くすることなく、この流体管２を接続対象１に安定して接続することができる。また、こうして、最小平滑部５ａ（第１平滑部５１）に加えて最大平滑部５ｃ（第２平滑部）を長くする必要がないことから、接続部４の長さを確実に短くすることができる。 Moreover, in 1st embodiment, the minimum smoothing part 5a located in the one side of the smoothing parts 5 in the connection part 4 becomes the 1st smoothing part 51, and the minimum smoothing part 5a (1st in the corrugation part 3) The portion adjacent to the smooth portion 51) is formed such that the inner diameter D31 of the convex portion 3b on the inner surface thereof is equal to the inner diameter D51 of the minimum smooth portion 5a, and the connection object 1 inserted into the minimum smooth portion 5a is the minimum smooth portion 5a. In addition to this, the insertion margin 3a is inserted, but in addition to this, the smoothing portion 5 located on the other side of the smoothing portions 5 and 5 in the connecting portion 4, that is, the maximum smoothing portion 5c is The portion of the corrugated portion 3 adjacent to the maximum smoothing portion 5c (second smoothing portion) is formed so that the inner diameter of the convex portion on the inner surface thereof is equal to the inner diameter D5c of the maximum smoothing portion 5c. The connection object 1 to be inserted into the part 5c is Is inserted following the section 5c, it may be made with other inserted inclusive fee. Thereby, when the smoothing unit 5 into which the connection target 1 is inserted is the maximum smoothing unit 5c (second smoothing unit), the connection target 1 is connected to the inner surface of the corrugated unit 3 following the maximum smoothing unit 5c. The convex portion is inserted into another insertion allowance formed so that the inner diameter of the convex portion is equal to the inner diameter D5c of the maximum smooth portion 5c. Therefore, in addition to the maximum smoothing unit 5c (second smoothing unit), another insertion allowance in the corrugated unit 3 becomes an insertion unit into which the connection target 1 is inserted, and therefore, the maximum smoothing unit 5c is not lengthened. The fluid pipe 2 can be stably connected to the connection object 1. In addition, in this way, it is not necessary to lengthen the maximum smoothing part 5c (second smoothing part) in addition to the minimum smoothing part 5a (first smoothing part 51), so that the length of the connecting part 4 can be reliably shortened. it can.

また、このように、第１平滑部５１の他に第２平滑部を設けた場合には、波付部３において挿し込み代３ａおよび前記他の挿し込み代を除いた部分の内面の凸部の内径が、挿し込み代３ａおよび前記他の挿し込み代の内面の凸部の内径よりも大きく形成されてもよい。こうして、波付部３において、挿し込み代３ａおよび他の挿し込み代を除いた部分の内面の凸部の内径を、挿し込み代３ａおよび他の挿し込み代の内面の凸部の内径よりも大きくすることで、波付部３における流体の流れを円滑にすることができる。 Further, when the second smoothing portion is provided in addition to the first smoothing portion 51 in this way, the convex portion on the inner surface of the portion excluding the insertion allowance 3a and the other insertion allowance in the corrugated portion 3. May be formed larger than the inner diameter of the protrusion on the inner surface of the insertion allowance 3a and the other insertion allowance. Thus, in the wavy portion 3, the inner diameter of the convex portion on the inner surface of the portion excluding the insertion allowance 3a and other insertion allowances is larger than the inner diameter of the convex portion on the inner surface of the insertion allowance 3a and the other insertion allowance. By enlarging, the flow of the fluid in the corrugation part 3 can be made smooth.

また、反対に、第二の実施の形態において、接続部４における平滑部５のうちの一方側に位置する最大平滑部５ｃが第１平滑部５１となり、波付部３における、最大平滑部５ｃ（第１平滑部５１）と隣接する部分は、その内面の凸部３ｂの内径Ｄ３１が最大平滑部５ｃの内径Ｄ５１と等しく形成されて、最大平滑部５ｃに挿入される接続対象１がその最大平滑部５ｃに続いて挿入される、挿し込み代３ａとなっているが、これに加えて、接続部４における平滑部５、５のうちの他方側に位置する平滑部５、つまり最小平滑部５ａが第２平滑部となり、波付部３における、最小平滑部５ａ（第２平滑部）と隣接する部分は、その内面の凸部の内径が最小平滑部５ａの内径と等しく形成されて、最小平滑部５ａに挿入される接続対象１がその最小平滑部５ａに続いて挿入される、他の挿し込み代となってもよい。これにより、接続対象１が挿入される平滑部５が最小平滑部５ａ（第２平滑部）の場合には、接続対象１は、その最小平滑部５ａに続いて、波付部３における内面の凸部の内径が最小平滑部５ａの内径と等しく形成された他の挿し込み代に挿入される。したがって、最小平滑部５ａ（第２平滑部）以外に、波付部３における他の挿し込み代が、接続対象１が挿入される挿入部となり、このため、最小平滑部５ａを長くすることなく、この流体管２を接続対象１に安定して接続することができる。また、こうして、最大平滑部５ｃ（第１平滑部５１）に加えて最小平滑部５ａ（第２平滑部）を長くする必要がないことから、接続部４の長さを確実に短くすることができる。 On the other hand, in the second embodiment, the maximum smoothing part 5c located on one side of the smoothing parts 5 in the connecting part 4 is the first smoothing part 51, and the maximum smoothing part 5c in the corrugated part 3 is used. The portion adjacent to the (first smoothing portion 51) is formed such that the inner diameter D31 of the convex portion 3b on the inner surface is equal to the inner diameter D51 of the maximum smoothing portion 5c, and the connection object 1 inserted into the maximum smoothing portion 5c is the maximum. The insertion margin 3a is inserted after the smoothing portion 5c, but in addition to this, the smoothing portion 5 located on the other side of the smoothing portions 5 and 5 in the connecting portion 4, that is, the minimum smoothing portion 5a becomes the second smoothing portion, and the portion adjacent to the minimum smoothing portion 5a (second smoothing portion) in the corrugated portion 3 is formed such that the inner diameter of the convex portion of the inner surface is equal to the inner diameter of the minimum smoothing portion 5a. The connection target 1 inserted into the minimum smoothing part 5a is the minimum. It is inserted following the sliding portion 5a, may be made with other cuttings inclusive fee. Thereby, when the smoothing unit 5 into which the connection target 1 is inserted is the minimum smoothing unit 5a (second smoothing unit), the connection target 1 is connected to the inner surface of the corrugated unit 3 following the minimum smoothing unit 5a. The convex portion is inserted into another insertion allowance formed so that the inner diameter of the convex portion is equal to the inner diameter of the minimum smooth portion 5a. Therefore, in addition to the minimum smoothing part 5a (second smoothing part), the other insertion allowance in the corrugated part 3 becomes an insertion part into which the connection target 1 is inserted, and therefore, the minimum smoothing part 5a is not lengthened. The fluid pipe 2 can be stably connected to the connection object 1. In addition, since it is not necessary to lengthen the minimum smoothing part 5a (second smoothing part) in addition to the maximum smoothing part 5c (first smoothing part 51), the length of the connecting part 4 can be reliably shortened. it can.

また、このように、第１平滑部５１の他に第２平滑部を設けた場合には、波付部３において挿し込み代３ａおよび前記他の挿し込み代を除いた部分の内面の凸部の内径が、挿し込み代３ａおよび前記他の挿し込み代の内面の凸部の内径よりも小さく形成されてもよい。こうして、波付部において、挿し込み代３ａおよび他の挿し込み代を除いた部分の内面の凸部の内径を、挿し込み代３ａおよび他の挿し込み代の内面の凸部の内径よりも小さくすることで、最大平滑部５ｃ（第１平滑部）とか最小平滑部５ａ（第２平滑部）に続いてこの挿し込み代３ａとか他の挿し込み代に挿入される接続対象１の過剰な挿し込みを防ぐことができ、ひいては、波付部３の可撓性を不必要に損なうことがない。 Further, when the second smoothing portion is provided in addition to the first smoothing portion 51 in this way, the convex portion on the inner surface of the portion excluding the insertion allowance 3a and the other insertion allowance in the corrugated portion 3. May be formed smaller than the inner diameter of the convex portion of the inner surface of the insertion allowance 3a and the other insertion allowance. Thus, in the corrugated portion, the inner diameter of the convex portion on the inner surface of the portion excluding the insertion allowance 3a and other insertion allowances is smaller than the inner diameter of the convex portion on the inner surface of the insertion allowance 3a and other insertion allowances. By doing so, excessive insertion of the connection target 1 inserted in the insertion allowance 3a or another insertion allowance following the maximum smoothing portion 5c (first smoothing portion) or the minimum smoothing portion 5a (second smoothing portion). In other words, the flexibility of the corrugated portion 3 is not unnecessarily impaired.

さらに、上述した二つの例のように、第１平滑部５１の他に第２平滑部を設けた場合であって、例えば、第２平滑部の内径が第１平滑部５１の内径Ｄ５１よりも大きくなるように、各平滑部５、５が並ぶ場合には、波付部３において挿し込み代３ａおよび他の挿し込み代を除いた部分の内面の凸部の内径が、挿し込み代３ａの内面の凸部の内径よりも大きく、かつ、他の挿し込み代の内面の凸部の内径よりも小さく形成されてもよい。こうすることで、波付部３における流体の流れをそれほど損なうことがなく、しかも、第２平滑部に続いて他の挿し込み代に挿入される接続対象１の過剰な挿し込みを防ぐことができる。 Furthermore, as in the two examples described above, the second smoothing unit is provided in addition to the first smoothing unit 51. For example, the inner diameter of the second smoothing unit is larger than the inner diameter D51 of the first smoothing unit 51. When the smoothing portions 5 and 5 are arranged so as to be larger, the inner diameter of the convex portion on the inner surface of the portion excluding the insertion allowance 3a and other insertion allowances in the corrugated portion 3 is equal to the insertion allowance 3a. It may be formed larger than the inner diameter of the convex portion on the inner surface and smaller than the inner diameter of the convex portion on the inner surface of another insertion allowance. By doing so, the flow of the fluid in the corrugated part 3 is not significantly impaired, and further, the excessive insertion of the connection target 1 inserted in another insertion allowance subsequent to the second smoothing part can be prevented. it can.

また、第一の実施の形態において、波付部３での挿し込み代３ａを除いた部分３ｃの内面の凸部３ｄの内径Ｄ３２は、挿し込み代３ａの内面の凸部３ｂの内径Ｄ３１よりも大きく形成されているが、反対に小さく形成されてもよく、同一に形成されてもよい。ここで、波付部３での挿し込み代３ａを除いた部分３ｃの内面の凸部３ｄの内径Ｄ３２が、挿し込み代３ａの内面の凸部３ｂの内径Ｄ３１よりも小さく形成される場合には、最小平滑部５ａ（第１平滑部５１）に続いて挿し込み代３ａに挿入される接続対象１の過剰な挿し込みを防ぐことができ、ひいては、波付部３の可撓性を不必要に損なうことがない。 Moreover, in 1st Embodiment, the internal diameter D32 of the convex part 3d of the inner surface of the part 3c except the insertion allowance 3a in the wavy part 3 is larger than the internal diameter D31 of the convex part 3b of the inner surface of the insertion allowance 3a. However, it may be formed smaller or the same. Here, when the inner diameter D32 of the convex portion 3d on the inner surface of the portion 3c excluding the insertion allowance 3a at the corrugated portion 3 is formed smaller than the inner diameter D31 of the convex portion 3b on the inner surface of the insertion allowance 3a. Can prevent excessive insertion of the connection target 1 inserted into the insertion allowance 3a subsequent to the minimum smoothing part 5a (first smoothing part 51), and consequently, the flexibility of the corrugated part 3 is reduced. There is no loss of necessity.

また、第二の実施の形態において、波付部３での挿し込み代３ａを除いた部分３ｃの内面の凸部３ｄの内径Ｄ３２は、挿し込み代３ａの内面の凸部３ｂの内径Ｄ３１よりも小さく形成されているが、反対に大きく形成されてもよく、同一に形成されてもよい。ここで、波付部３での挿し込み代３ａを除いた部分３ｃの内面の凸部３ｄの内径Ｄ３２が、挿し込み代３ａの内面の凸部３ｂの内径Ｄ３１よりも大きく形成される場合には、波付部３における流体の流れを円滑にすることができる。 Moreover, in 2nd Embodiment, the internal diameter D32 of the convex part 3d of the inner surface of the part 3c except the insertion allowance 3a in the corrugated part 3 is larger than the internal diameter D31 of the convex part 3b of the inner surface of the insertion allowance 3a. Are formed small, but may be formed large oppositely or may be formed identically. Here, when the inner diameter D32 of the convex portion 3d on the inner surface of the portion 3c excluding the insertion allowance 3a at the corrugated portion 3 is formed larger than the inner diameter D31 of the convex portion 3b on the inner surface of the insertion allowance 3a. Can smooth the flow of the fluid in the corrugated portion 3.

１接続対象
２流体管
３波付部
３ａ挿し込み代
３ｂ内面の凸部
Ｄ３１内径
３ｃ挿し込み代を除いた部分
３ｄ内面の凸部
Ｄ３２内径
４接続部
５平滑部
５１第１平滑部
Ｄ５１内径 DESCRIPTION OF SYMBOLS 1 Connection object 2 Fluid pipe 3 Corrugated part 3a Insertion allowance 3b Inner surface convex part D31 Inner diameter 3c The part except the insertion allowance 3d Inner surface convex part D32 Inner diameter 4 Connection part 5 Smoothing part 51 1st smooth part D51 Inner diameter

Claims

A corrugated part in which the inside and outside are continuously formed in an uneven shape along the longitudinal direction and a connection part into which a connection target is inserted are fluid pipes alternately arranged in the longitudinal direction,
The connecting portion has two or more types of smoothing portions having different inner diameters so as to correspond to two or more types of outer diameters of the connection target, and the smoothing portions are continuously arranged,
The smoothing part located on one side of the smoothing part in the connecting part becomes the first smoothing part, and the portion adjacent to the first smoothing part in the corrugated part has an inner diameter of the convex part on the inner surface thereof. A fluid pipe that is formed to be equal to the inner diameter of the first smoothing portion and that is an insertion allowance in which the connection target inserted into the first smoothing portion is inserted following the first smoothing portion.

The smoothing part located on the other side of the smoothing part in the connecting part is the second smoothing part, and the portion adjacent to the second smoothing part in the corrugated part has an inner diameter of the convex part on the inner surface thereof. It is formed equal to the inner diameter of the second smoothing portion, and the connection object inserted into the second smoothing portion is another insertion allowance inserted subsequent to the second smoothing portion. Item 4. The fluid pipe according to Item 1.

2. The fluid pipe according to claim 1, wherein an inner diameter of the convex portion on the inner surface of the portion excluding the insertion allowance in the corrugated portion is larger than an inner diameter of the convex portion on the inner surface of the insertion allowance.

2. The fluid pipe according to claim 1, wherein an inner diameter of the convex portion on the inner surface of the portion excluding the insertion allowance in the corrugated portion is smaller than an inner diameter of the convex portion on the inner surface of the insertion allowance.