JPH03140686A - Multilayer bellows pipe - Google Patents
Multilayer bellows pipeInfo
- Publication number
- JPH03140686A JPH03140686A JP1275520A JP27552089A JPH03140686A JP H03140686 A JPH03140686 A JP H03140686A JP 1275520 A JP1275520 A JP 1275520A JP 27552089 A JP27552089 A JP 27552089A JP H03140686 A JPH03140686 A JP H03140686A
- Authority
- JP
- Japan
- Prior art keywords
- multilayer
- pipe
- bellows
- tube
- layers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002184 metal Substances 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 claims abstract description 8
- 230000000379 polymerizing effect Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 11
- 238000006073 displacement reaction Methods 0.000 abstract description 10
- 238000000465 moulding Methods 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
多層蛇腹管は可撓性に富んでいて、外部からの衝撃を吸
収し、また振動吸収の機能をも有するために、自動車の
排気装置の配管、船舶のエンジン廻りの配管、空調関係
のポンプ、コンプレッサの配管などに広く使用されてい
る。[Detailed Description of the Invention] (Industrial Application Field) Multilayer bellows tubes are highly flexible, absorb external shocks, and also have the function of vibration absorption, so they are used in automobile exhaust systems. Widely used for piping, piping around ship engines, air conditioning pumps, compressor piping, etc.
（従来の技術）
従来の多層蛇腹管は、例えば実開昭６２−６２０８６号
公報で提案されているように、１枚の金属薄板を多層に
巻回し、その最外周巻終端部を溶接した円筒体に波付は
成形して製作される。(Prior Art) A conventional multilayer bellows pipe is a cylinder made by winding a single metal thin plate in multiple layers and welding the outermost end of the winding, as proposed in, for example, Japanese Utility Model Application Publication No. 62-62086. The waves on the body are made by molding.
第１１図はこのようにして製作される従来の多層蛇腹管
の断面部分を有する正面図であり、多層蛇腹管１の軸方
向に同一板厚で同一形状の山部２が等間隔で形成されて
いる。FIG. 11 is a front view with a cross section of a conventional multilayered bellows pipe manufactured in this manner, in which peaks 2 of the same thickness and shape are formed at equal intervals in the axial direction of the multilayered bellows pipe 1. ing.
（発明が解決しようとする課題〉
前述の従来の多層蛇腹管に曲げ変位が加えられると、第
１１図の多層蛇腹管１の固定部４に近傍する蛇腹部３に
かかる曲げモーメントが大きくなるので、この部分に応
力が集中して発生し、前記蛇腹部３での多層蛇腹管１の
折損事故の発生が比較的多かった。(Problem to be Solved by the Invention) When a bending displacement is applied to the conventional multilayer bellows pipe described above, the bending moment applied to the bellows portion 3 near the fixed portion 4 of the multilayer bellows pipe 1 shown in FIG. 11 increases. , Stress is concentrated in this portion, and breakage accidents of the multilayered bellows tube 1 at the bellows portion 3 occur relatively frequently.
また、従来の多層蛇腹管では、全体の壁厚が一定で且つ
等間隔で蛇腹が形成されているために、多層蛇腹管が全
長にわたって同一の共振周波数を有し、この共振周波数
ては多層蛇腹管が全長で共振するため、容易に破損事故
の発生に到ることがあった。In addition, in conventional multilayer bellows pipes, the overall wall thickness is constant and the bellows are formed at equal intervals, so the multilayer bellows pipe has the same resonant frequency over its entire length, and this resonant frequency Because the pipe resonates along its entire length, it could easily lead to damage.
本発明は、前述したような多層蛇腹管の現状に鑑みてな
されたもので、その目的は曲げ変位が加えられても固定
部に近傍する蛇腹部において折損事故が発生せず、また
、耐振強度も向上した多層蛇腹管を提供することにある
。The present invention was made in view of the current state of multilayer bellows pipes as described above, and its purpose is to prevent breakage accidents in the bellows portion near the fixed part even when bending displacement is applied, and to improve vibration resistance. Another object of the present invention is to provide an improved multilayer bellows tube.
（課題を解決するための手段）
前記目的を達成するために、本発明では少くともその一
端部の管壁の層数が他の部分の層数より多くなるよう構
成した多層管体の周面が、波付は成形され、更に多層管
体を複数の金属薄板を巻回するか或いは金属管体を重合
して構成するものである。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a peripheral surface of a multilayer tube configured such that the number of layers of the tube wall at least at one end thereof is greater than the number of layers at other portions. However, the corrugated tube is formed, and the multilayer tube is constructed by winding a plurality of thin metal plates or by polymerizing metal tubes.
（作 用）
本発明では、複数の金属薄板を巻回するか又は金属管体
を重合するかして少くともその一端部の管壁の層数が他
の部分の層数より多くなるように構成した多層管体の周
面が、波付は成形されるが、例えば多層蛇腹管の固定部
に近傍する管壁を厚くすれば剛性が増して変形しにくく
なり、曲げ変位か加えられても固定部近傍での発生応力
は他の部分より小さくなる。従って、肉厚の変化によっ
てその全長に亘る応力分布が等しくなるため折損事故を
防止できる。(Function) In the present invention, by winding a plurality of thin metal plates or polymerizing a metal tube, the number of layers on the tube wall at least at one end thereof is greater than the number of layers at other parts. Although the peripheral surface of the constructed multilayer pipe body is formed with corrugations, for example, if the pipe wall near the fixed part of the multilayer bellows pipe is made thicker, the rigidity will increase and it will be difficult to deform, even if bending displacement is applied. The stress generated near the fixed part is smaller than in other parts. Therefore, the stress distribution over the entire length becomes equal due to the change in wall thickness, and breakage accidents can be prevented.
また、多層蛇腹管の軸方向に管壁の異なる部分を形成す
ることにより、軸方向の各部分で多層蛇腹管の共振周波
数を異ならせ、全体が共振振動して破損しないように多
層蛇腹管の耐振強度を向上させることが出来る。In addition, by forming different parts of the pipe wall in the axial direction of the multilayer bellows pipe, the resonance frequency of the multilayer bellows pipe is made different in each part in the axial direction, and the multilayer bellows pipe is prevented from being damaged by resonant vibration. Vibration resistance can be improved.
（実施例）
以下、本発明の実施例を図面を参照して説明する。第１
図は、第１の実施例の多層管体の断面図、第２図は、第
１の実施例に係る多層蛇腹管の断面図である。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
The figure is a cross-sectional view of the multilayer pipe according to the first embodiment, and FIG. 2 is a cross-sectional view of the multilayer bellows pipe according to the first embodiment.
第１図に示すように、第１の実施例では軸方向に異なる
長さの金属薄板５ａ〜５ｄ（５ｄのみ２枚使用する）を
、端部をそろえて長さの順に配列して拡縮芯体７の周面
に巻回し、その後に拡縮芯体７の外径を縮小して抜き収
り、所定の管径の多層管体６ａが形成されている。As shown in FIG. 1, in the first embodiment, metal thin plates 5a to 5d (only 5d uses two sheets) of different lengths in the axial direction are arranged in order of length with their ends aligned to form an expanding and contracting core. It is wound around the circumferential surface of the body 7, and then the outer diameter of the expanding/contracting core body 7 is reduced and extracted to form a multilayer tube body 6a having a predetermined tube diameter.
なお、多層管体６ａは前述のように形成する方法のみな
らず、その軸方向の長さが異なり、且つ互いに嵌合しう
る内、外径を有する管体を重合し、更に密嵌して構成す
ることもでき、この構成は多層管体を巻回して形成する
以後の実施例にも適用できる。The multilayer tube 6a can be formed not only by the method described above, but also by superimposing tubes having different axial lengths and inner and outer diameters that can be fitted into each other, and then tightly fitting them together. This structure can also be applied to subsequent embodiments in which a multilayer tube is wound.
この多層管体６ａに対して公知の波付は成形機を使用し
て波付は成形を施し、第２図に示すような多層蛇腹管８
ａが形成されている。この多層蛇腹管８ａは、固定部９
に接続される一端部側の管壁が他部分よりも厚く剛性が
大となっている。A known corrugated molding machine is used to form the corrugations on this multilayer pipe body 6a, and a multilayer bellows pipe 8 as shown in FIG.
a is formed. This multilayer bellows tube 8a has a fixed part 9
The pipe wall at one end, which is connected to the pipe, is thicker and more rigid than the other parts.
このため、多層蛇腹管８ａに曲げ変位が加えられても固
定部９の近傍における剛性が増し変形しにくくなり発生
応力が小さくなるため全体として応力分布が均一化して
多層蛇腹管８ａの折損を防止できる。Therefore, even if bending displacement is applied to the multilayer bellows tube 8a, the rigidity near the fixing part 9 increases, making it difficult to deform, and the generated stress is reduced, making the stress distribution uniform as a whole and preventing breakage of the multilayer bellows tube 8a. can.
第３図は、第２の実施例の多層管体の断面図、第４図は
第２の実施例に係る多層蛇腹管の断面図である。FIG. 3 is a sectional view of a multilayer pipe according to the second embodiment, and FIG. 4 is a sectional view of a multilayer bellows pipe according to the second embodiment.
この第２の実施例では、第１の実施例に比して金属薄板
５ａ〜５ｄの積層順序が逆となっており、公知の波付は
成形機を使用して、第４図に示すような構成の多層蛇腹
管８ｂが得られる。In this second embodiment, the lamination order of the thin metal plates 5a to 5d is reversed compared to the first embodiment, and the known corrugation is formed using a forming machine as shown in FIG. A multilayer bellows tube 8b having a configuration is obtained.
この多層蛇腹管８ｂも第１の実施例と同様に、曲げ変位
の印加があっても固定部９の近傍に応力か発生しても折
損することがない。Similarly to the first embodiment, this multilayer bellows tube 8b will not break even if bending displacement is applied or stress is generated in the vicinity of the fixing portion 9.
なお、第１図乃至第４図は蛇腹管の一端部の層数を多く
したものであるが、これは蛇腹管の両端部における雰囲
気温度が大きく異なる時に層数の多い端部を高温側に用
いる場合等に効果的である。In addition, in Figures 1 to 4, the number of layers at one end of the bellows tube is increased, but this is because when the ambient temperature at both ends of the bellows tube is greatly different, the end with a large number of layers is placed on the high temperature side. It is effective when used.
第５図は、第３の実施例の多層管体の断面図、第６図は
第３の実施例に係る多層蛇腹管の断面図である。FIG. 5 is a sectional view of a multilayer pipe according to the third embodiment, and FIG. 6 is a sectional view of a multilayer bellows pipe according to the third embodiment.
この第３の実施例は、第５図に示すように、軸方向に異
なる長さの金属薄板５８〜５ｄを４枚使用し、最長の金
属薄板５ｄの両端に端部をそろえて、長さの順に配列し
た状態で巻回して、多層管体６Ｃが形成されている。In this third embodiment, as shown in FIG. 5, four thin metal plates 58 to 5d having different lengths in the axial direction are used, and the ends are aligned with both ends of the longest thin metal plate 5d. The multilayer pipe body 6C is formed by winding the pipes arranged in this order.
この多層管体６Ｃから形成される多層蛇腹管８Ｃは第６
図のような構成となっている。The multilayer bellows tube 8C formed from this multilayer tube body 6C is the sixth
The configuration is as shown in the figure.
この多層蛇腹管８Ｃも、第１の実施例と同様に、曲げ変
位の印加に際しても固定部９の近１ｇの剛性を高めて剛
性の低い他の部分より変形しにくく発生応力を小とし結
果として応力分布が等しくなり折損を防止するものであ
る。Similarly to the first embodiment, this multilayer bellows tube 8C also has increased rigidity in the vicinity of the fixing part 9 when bending displacement is applied, so that it is less likely to deform than other parts with lower rigidity, and as a result, the generated stress is reduced. This ensures equal stress distribution and prevents breakage.
なお、共振周波数を異ならせるために多層管体６Ｃの少
くとも一部の軸方向端部を図示のように傾斜状に切断す
るとより効果的である。In addition, it is more effective to cut at least a part of the axial end portion of the multilayer tube 6C in an inclined shape as shown in the figure in order to make the resonance frequencies different.
第７図は、第４の実施例の多層管体の断面図、第８図は
、第４の実施例に係る多層蛇腹管の断面図である。FIG. 7 is a sectional view of a multilayer pipe according to the fourth embodiment, and FIG. 8 is a sectional view of a multilayer bellows pipe according to the fourth embodiment.
この第４の実施例は、第７図及び第８図に示すように、
第３の実施例で金属薄板５ａ〜５ｄの積層順序を逆とし
たものである。This fourth embodiment, as shown in FIGS. 7 and 8,
In the third embodiment, the stacking order of the thin metal plates 5a to 5d is reversed.
この多層蛇腹管８ｄも第１の実施例と同様に曲げ変位の
印加によっても固定部９の近傍において折損することが
なく、又共振周波数をより異ならせるために金属薄板５
ａ〜５ｄの少くとも一部の軸方向端部を波形として形成
した。Similar to the first embodiment, this multilayer bellows tube 8d does not break near the fixing part 9 even when bending displacement is applied, and in order to make the resonance frequencies more different, the thin metal plate 5
At least some of the axial ends of a to 5d were formed in a waveform.
なお、第１の実施例乃至第４の実施例に係る多層蛇腹管
８ａ〜８ｄでは、固定部９側の管壁厚が、その他の部分
よりも厚いため、多層蛇腹管８８〜８ｄの共振周波数が
固定部９側と他の部分とでは異なる。In addition, in the multilayer bellows tubes 8a to 8d according to the first to fourth embodiments, the tube wall thickness on the fixed part 9 side is thicker than other parts, so that the resonance frequency of the multilayer bellows tubes 88 to 8d is different between the fixed part 9 side and other parts.
このため、多層蛇腹管８ａ〜８ｄが全体的に共振状態と
なって破損することが防止される。For this reason, the multilayer bellows tubes 8a to 8d are prevented from being in a resonant state as a whole and being damaged.
第９図は、第５の実施例の多層管体の断面図、第１０図
は、第５の実施例に係る多層蛇腹管の断面図である。FIG. 9 is a sectional view of a multilayer pipe according to the fifth embodiment, and FIG. 10 is a sectional view of a multilayer bellows pipe according to the fifth embodiment.
この第５の実施例は、共振破損の防止の構成を積極的に
取り入れたもので、第９図に示すように多Ｊ−管体６Ｃ
には軸方向において、管壁厚の異なる個所が両端部と中
央部との３個所で形成されている。This fifth embodiment actively incorporates a structure to prevent resonance damage, and as shown in FIG.
In the axial direction, there are three locations where the tube wall thickness differs: at both ends and at the center.
このような多層管体６Ｃに波付は成形を施して形成され
る多層蛇腹管８ｅは、第１０図に示すように軸方向の３
個所で管壁厚が異なっている。このため多層蛇腹管８ｅ
の中央部分と両端部側とは、異なる共振周波数を有し、
耐振強度が向上して多層蛇腹管８ｅ全体が共振して破損
することが防止される。The multilayer bellows tube 8e, which is formed by forming corrugations on the multilayer tube body 6C, has three axial directions as shown in FIG.
The tube wall thickness differs at different locations. Therefore, the multilayer bellows tube 8e
The central part and both end sides have different resonant frequencies,
The vibration resistance is improved and the entire multilayer bellows tube 8e is prevented from being damaged due to resonance.
また、第５の実施例においても両端部側の管壁厚が大で
剛性が高いので、曲げ変位の印加によって固定部９ａ、
９ｂの近傍において折損することが防止される。Also in the fifth embodiment, since the tube wall thickness at both ends is large and the rigidity is high, by applying bending displacement, the fixed portion 9a,
Breakage near 9b is prevented.
さらに、第５の実施例においては、軸方向の３個所で異
なる共振周波数を有する音響通過域が形成されているの
で、騒音の減衰効果を高めることが出来る。Furthermore, in the fifth embodiment, since acoustic passbands having different resonance frequencies are formed at three locations in the axial direction, the noise damping effect can be enhanced.
（発明の効果）
以上詳細に説明したように、本発明によると、固定部近
傍での剛性が高められ、曲げ変位が与えられても固定部
近傍において折損事故が発生することがなく、さらに耐
振強度が向上し、騒音の減衰効果も高められる。(Effects of the Invention) As described in detail above, according to the present invention, the rigidity near the fixed part is increased, breakage accidents do not occur near the fixed part even if bending displacement is applied, and vibration resistance is further improved. The strength is improved and the noise damping effect is also enhanced.
第１図及び第２図は、第１の実施例の説明図で、第１図
は多層管体の断面図、第２図は多層蛇腹管の断面図、第
３図及び第４図は、第２の実施例の説明図で、第３図は
多層管体の断面図、第４図は多層蛇腹管の断面図、第５
図及び第６図は、第３の実施例の説明図で、第５図は多
層管体の断面図、第６図は多層蛇腹管の断面図、第７図
及び第８図は第ｔ１の実施例の説明図で、第７図は多層
管体の断面図、第８図は多層蛇腹管の断面図、第９図及
び第１０図は、第５の実施例の説明図で、第９図は多層
管体の断面図、第１１図は多層蛇腹管の断面図である。
５８〜５ｂ・・・金属薄板、６ａ〜６ｅ・・・多層管体
、７・・・拡縮芯体、８ａ〜８ｅ・・・多層蛇腹管、９
・・・固定部、９ａ〜９ｂ・・固定部。1 and 2 are explanatory diagrams of the first embodiment, in which FIG. 1 is a sectional view of a multilayer tube, FIG. 2 is a sectional view of a multilayer bellows tube, and FIGS. 3 and 4 are FIG. 3 is a cross-sectional view of the multilayer tube, FIG. 4 is a cross-sectional view of the multilayer bellows tube, and FIG.
6 and 6 are explanatory diagrams of the third embodiment, FIG. 5 is a sectional view of the multilayer tube, FIG. 6 is a sectional view of the multilayer bellows tube, and FIGS. 7 and 8 are sectional views of the t1. FIG. 7 is a cross-sectional view of a multilayer tube, FIG. 8 is a cross-sectional view of a multilayer bellows tube, and FIGS. 9 and 10 are explanatory views of a fifth embodiment. The figure is a cross-sectional view of a multilayer pipe body, and FIG. 11 is a cross-sectional view of a multilayer bellows pipe. 58-5b...Metal thin plate, 6a-6e...Multilayer tube body, 7...Expansion/contraction core body, 8a-8e...Multilayer bellows tube, 9
...Fixed part, 9a-9b...Fixed part.
Claims (3)
数より多くなるよう構成した多層管体の周面が、波付け
成形されてなる多層蛇腹管。(1) A multilayer bellows tube formed by corrugating the circumferential surface of a multilayer tube body configured such that the number of layers on the tube wall at least at one end is greater than the number of layers at other portions.
た請求項１記載の多層蛇腹管。(2) The multilayer bellows tube according to claim 1, wherein the multilayer tube body is constructed by winding a plurality of thin metal plates.
た請求項１記載の多層蛇腹管。(3) The multilayer bellows tube according to claim 1, wherein the multilayer tube is constructed by polymerizing a plurality of metal tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1275520A JP2767627B2 (en) | 1989-10-23 | 1989-10-23 | Multi-layer bellows tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1275520A JP2767627B2 (en) | 1989-10-23 | 1989-10-23 | Multi-layer bellows tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03140686A true JPH03140686A (en) | 1991-06-14 |
| JP2767627B2 JP2767627B2 (en) | 1998-06-18 |
Family
ID=17556611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1275520A Expired - Fee Related JP2767627B2 (en) | 1989-10-23 | 1989-10-23 | Multi-layer bellows tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2767627B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03140687A (en) * | 1989-10-24 | 1991-06-14 | Usui Internatl Ind Co Ltd | Multilayer bellows pipe and material therewith |
| EP1025920A3 (en) * | 1999-02-04 | 2002-10-23 | Nauchno-Proizvodstvennoe Obiedinenie "Energomash", Imenie Akademika V.P. Glushko | A method for producing a multilayer thin-walled bellows of stainless steel |
| JP2011067707A (en) * | 2011-01-14 | 2011-04-07 | Mitsubishi Electric Corp | Washing/drying machine |
| WO2018139577A1 (en) * | 2017-01-27 | 2018-08-02 | 日本精工株式会社 | Hollow torque transmission member, manufacturing method therefor, intermediate shaft, and automobile steering device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5574885A (en) * | 1978-11-30 | 1980-06-05 | Sharp Corp | Liquid feeder |
| JPS6163318A (en) * | 1984-09-04 | 1986-04-01 | Amada Metoretsukusu:Kk | Method and device for supporting and taking out plate material in press brake |
-
1989
- 1989-10-23 JP JP1275520A patent/JP2767627B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5574885A (en) * | 1978-11-30 | 1980-06-05 | Sharp Corp | Liquid feeder |
| JPS6163318A (en) * | 1984-09-04 | 1986-04-01 | Amada Metoretsukusu:Kk | Method and device for supporting and taking out plate material in press brake |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03140687A (en) * | 1989-10-24 | 1991-06-14 | Usui Internatl Ind Co Ltd | Multilayer bellows pipe and material therewith |
| EP1025920A3 (en) * | 1999-02-04 | 2002-10-23 | Nauchno-Proizvodstvennoe Obiedinenie "Energomash", Imenie Akademika V.P. Glushko | A method for producing a multilayer thin-walled bellows of stainless steel |
| JP2011067707A (en) * | 2011-01-14 | 2011-04-07 | Mitsubishi Electric Corp | Washing/drying machine |
| WO2018139577A1 (en) * | 2017-01-27 | 2018-08-02 | 日本精工株式会社 | Hollow torque transmission member, manufacturing method therefor, intermediate shaft, and automobile steering device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2767627B2 (en) | 1998-06-18 |
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