【発明の詳細な説明】（産業上の利用分野）二の発明は、液体又は気体を通すために用いられる多重
金属管及びその製造方法並びに注射針に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The second invention relates to a multilayer metal tube used for passing liquid or gas, a method for manufacturing the same, and a syringe needle.
（従来の技術）従来より外管の中に複数の内管を挿入した、いわゆる多
重金属管は公知であり、その具体例が第３図に示されて
いる。(Prior Art) A so-called multilayer metal tube in which a plurality of inner tubes are inserted into an outer tube is conventionally known, and a specific example thereof is shown in FIG.
第３図において、金属からなる外管１の中には、同じく
金属からなる例えば４本の内管２が挿入され、外管１と
内管２及び内管２同士が互いに接触するように配置され
ている。このような多重金属管を製造するに際しては、
まず、外管ｌと内管２の外径及び内径を誤差のないよう
に設計し、外管１に内管２を差し込み、その後必要な長
さに切断して利用するようになっていた。In FIG. 3, for example, four inner tubes 2 made of metal are inserted into an outer tube 1 made of metal, and the outer tube 1 and the inner tube 2 are arranged so that they are in contact with each other. has been done. When manufacturing such multilayer metal tubes,
First, the outer and inner diameters of the outer tube 1 and the inner tube 2 are designed so that there are no errors, the inner tube 2 is inserted into the outer tube 1, and then cut to a required length for use.
（発明が解決しようとする課題）しかしながら、上記従来例においては、外管１と内管２
との間に使用されない空間３が生じ、外管１の径に対す
る内管２内の断面積の合計の割合が小さく、無駄が多か
った。また、製造に際しては、外管１と内管２の外径又
は内径の寸法に狂いがあると、外管１と内管２との組合
せがうまくなく、内管２を外管１に挿入できなくなった
り、外管１と内管２との間にすき間が生じて内管２の固
定性が悪くなったりする。このように従来の多重金属管
においては、寸法精度が要求されるので、例えば注射針
のように細いものはできなかった。(Problem to be Solved by the Invention) However, in the above conventional example, the outer tube 1 and the inner tube 2
An unused space 3 was created between the two, and the ratio of the total cross-sectional area inside the inner tube 2 to the diameter of the outer tube 1 was small, resulting in much waste. Also, during manufacturing, if there is a discrepancy in the outer diameter or inner diameter of the outer tube 1 and the inner tube 2, the combination of the outer tube 1 and the inner tube 2 will not work properly, and the inner tube 2 will not be able to be inserted into the outer tube 1. Otherwise, a gap may occur between the outer tube 1 and the inner tube 2, resulting in poor fixation of the inner tube 2. As described above, since dimensional accuracy is required for conventional multilayer metal tubes, for example, thin tubes such as injection needles cannot be manufactured.
この発明の第１の課題は、外管の径に刻する内管内の１
析面積の合計の割合を高くして利用率を向」ニサせるこ
とができる多重金属管を提供することにある。The first problem of this invention is to solve the problem of 1.
It is an object of the present invention to provide a multilayer metal pipe that can improve the utilization rate by increasing the ratio of the total analysis area.
この発明の第２の課題は、外管及び内管の内径及び外径
に列して厳密な設計、製造を行う必要がなく、容易に製
造することができる多重金属管の製造方法を提供するこ
とにある。A second object of the present invention is to provide a method for manufacturing a multi-layered metal tube that can be easily manufactured without the need for strict design and manufacturing in line with the inner and outer diameters of the outer and inner tubes. There is a particular thing.
この発明の第３の課題は、複数の種類の液体又は気体を
同時に注入又は吸入することができる注射針を提供する
ことにある。A third object of the present invention is to provide an injection needle that can simultaneously inject or inhale multiple types of liquids or gases.
（課題を解決するための手段）上記の第１の課題を解決するため、請求項１の多重金属
管は、金属からなる外管と、この外管の中に挿入された
金属からなる複数の内管とから構成し、前記外管と内管
及び内管同士の少なくとも一部が面接触するようにした
ものである。ここで、外管と内管には、ステンレス鋼、
銅、アルミニウム等を用いることができる。(Means for Solving the Problems) In order to solve the above first problem, the multiple metal tube of claim 1 has an outer tube made of metal and a plurality of metal tubes inserted into the outer tube. The outer tube and the inner tube are in surface contact with each other, and at least a portion of the inner tubes are in surface contact with each other. Here, the outer tube and inner tube are made of stainless steel,
Copper, aluminum, etc. can be used.
才た、」１記の第２の課題を解決するため、請求項２の
多重金属管の製造方法は、金属からなる外管に金属から
なる複数の内管を挿入し、その後内管と共に外管を引き
抜き加工して管径を絞り、前記外管と内管及び内管同士
の少なくとも一部が面接触するようにしたものである。In order to solve the second problem described in item 1, the method for manufacturing a multilayer metal tube according to claim 2 includes inserting a plurality of inner tubes made of metal into an outer tube made of metal, and then inserting a plurality of inner tubes made of metal into an outer tube made of metal. The diameter of the tube is reduced by drawing the tube so that at least a portion of the outer tube and the inner tube and the inner tubes are in surface contact with each other.
ここで、外管の引き抜き加工にはダイスが用いられる。Here, a die is used for drawing the outer tube.
さらに、」１記の第３の課題を解決するため、請求項３
の注射針は、金属からなる外管と、この外管の中に挿入
された金属からなる複数の内管とから構成するようにし
たものである。Furthermore, in order to solve the third problem set forth in ``Claim 3'',
The injection needle is composed of an outer tube made of metal and a plurality of inner tubes made of metal inserted into the outer tube.
（作用）」１記のように、この発明においては、外管と内管及び
内管同士の少なくとも一部が面接触するようにしたので
、従来の多重金属管と比較して、その面接触している分
だけ外管の径に対する内管内の断面積の合計の割合が高
くすることができる。(Function) As described in item 1, in this invention, at least a portion of the outer tube and the inner tube and the inner tubes are in surface contact with each other. The ratio of the total cross-sectional area inside the inner tube to the diameter of the outer tube can be increased accordingly.
また、外管を引き抜き加工して管径を絞ることで内管も
含めて変形させて多重金属管を製造するようにしたので
、外管及び内管の寸法がラフであってもその誤差を管径
の絞りにより吸収することができる。さらに、注射針に
おいて、多重管としたので、それぞれの内管には異なっ
た液体又は気体を同時に注入又は吸入することができる
ものである。In addition, by drawing the outer tube and narrowing the tube diameter, the inner tube is also deformed to produce a multilayer metal tube, so even if the dimensions of the outer tube and inner tube are rough, the errors can be avoided. This can be absorbed by restricting the tube diameter. Furthermore, since the injection needle has multiple tubes, different liquids or gases can be simultaneously injected or inhaled into each inner tube.
（実施例）以下、この発明の実施例を図面により説明する。(Example)Embodiments of the present invention will be described below with reference to the drawings.
第１図において、この発明の一実施例が示され、多重金
属管は、第１図（Ｃ）に示すように、外管１と、この外
管１内に挿入された２つの内管２とから構成されている
。In FIG. 1, one embodiment of the present invention is shown, and as shown in FIG. It is composed of.
外管Ｊと内管２とは、共に例えば５ＵＳ３０４のステン
レス鋼からなる。内管２は、この実施例においては、同
じ断面形状をもち、内管２同士が互いに対向する外側平
面部分を介して面接触している。Both the outer tube J and the inner tube 2 are made of, for example, 5US304 stainless steel. In this embodiment, the inner tubes 2 have the same cross-sectional shape, and the inner tubes 2 are in surface contact with each other via their opposing outer plane portions.
また、この内管２は、上記外側平面部分を除いた半円状
の外周部分が外管１の内面に面接触している。Further, the inner tube 2 has a semicircular outer circumferential portion excluding the above-mentioned outer flat portion, which is in surface contact with the inner surface of the outer tube 1.
このように構成された多重金属管は、第１図（ａ）、（
ｂ）に示すようにして製造される。The multilayer metal tube constructed in this way is shown in Fig. 1(a), (
Manufactured as shown in b).
即ち、まず、完成時よりも太い外管１に円筒状の内管２
を挿入する。この場合、内管２は外管１に接触するよう
な外径をもつ必要はない。このように、外管１に円筒状
の内管２を挿入した状態では、外管１と内管２との間に
は、従来と同様に空間３が存在している。That is, first, a cylindrical inner tube 2 is attached to an outer tube 1 that is thicker than when completed.
Insert. In this case, the inner tube 2 does not need to have an outer diameter such that it contacts the outer tube 1. In this way, when the cylindrical inner tube 2 is inserted into the outer tube 1, a space 3 exists between the outer tube 1 and the inner tube 2, as in the conventional case.
次に内管２が挿入された外管１をダイス５により引き扱
き加工する。これにより外管１が絞り込まれるので、外
管１の径が一様に小さくなると共に、内管２も変形され
る。即ち、図中縦方向には内管２同士が１貴し？っで偏
平するように変形し、図中横方向には空間３に逃げる形
で変形する。したがって、所定以上のりダクション係数
を与えれば、空間３がほとんど消滅し、内管２が外管１
に沿う形となる。このため、外管１の内部断面積の減少
の割合と比較して、内管２の内部断面積の減少の割合が
少なく、外管１の径に列する内管２内の断面積の合計の
割合が高くすることができる。また、さらにリダクショ
ン係数を大きくしてやると、内管２の内部断面積をその
割合に応じて小さくすることができ、内管２内に流す流
量をリダクション係数により設定することができる。Next, the outer tube 1 into which the inner tube 2 has been inserted is handled and processed using a die 5. As a result, the outer tube 1 is narrowed, so that the diameter of the outer tube 1 is uniformly reduced and the inner tube 2 is also deformed. In other words, in the vertical direction in the figure, the inner tubes 2 are connected to one another. It deforms in such a way that it becomes flat, and in the horizontal direction in the figure it deforms in a way that it escapes into space 3. Therefore, if a predetermined or higher glide coefficient is given, the space 3 will almost disappear and the inner tube 2 will become the outer tube 1.
The shape follows. Therefore, the rate of decrease in the internal cross-sectional area of the inner tube 2 is smaller than the rate of decrease in the internal cross-sectional area of the outer tube 1, and the total cross-sectional area within the inner tube 2 aligned with the diameter of the outer tube 1 is smaller. The proportion of can be increased. Moreover, if the reduction coefficient is further increased, the internal cross-sectional area of the inner tube 2 can be reduced in proportion to the ratio, and the flow rate flowing into the inner tube 2 can be set by the reduction coefficient.
尚、外管１と内管２とを同時に引き抜く際、リダクショ
ンが一様に行われず内管２の一部又は全部が外管１との
間でずれることが起こりうる。このとき外管１と内管２
あるいは内管２同土間の摩擦力の影響でずれが引き止め
られ、管内部にストレスとして残ると多重金属管の変形
や強度の偏りといった不都合が起こる。このため、外管
１内に内管２を挿入する際には、潤滑剤を管と管との間
に巡らし加工時のずれを逃がすようにすることが好まし
い。Note that when the outer tube 1 and the inner tube 2 are pulled out at the same time, the reduction may not be performed uniformly and a part or all of the inner tube 2 may be displaced from the outer tube 1. At this time, outer tube 1 and inner tube 2
Alternatively, if the displacement is stopped by the frictional force between the inner tube 2 and the earth, and stress remains inside the tube, problems such as deformation of the multilayer metal tube and uneven strength occur. For this reason, when inserting the inner tube 2 into the outer tube 1, it is preferable to circulate a lubricant between the tubes to release any misalignment during machining.
第２図において、この発明の他の実施例として注射針に
応用したものが示されている。In FIG. 2, another embodiment of the present invention is shown applied to a syringe needle.
即ち、法則針５は、手前の骨太部６と先端の骨細部７と
から構ｔｃされ、骨細部７が人体等の体内に挿入される
。骨細部７も多重管となっているので、同時に２種類の
薬剤を体内に注入したり、あるいは献血として血液を体
内から抜きながら同時に薬剤又は生理食塩水等を体内に
供給するといった用途に用いることができるものである
。That is, the regular needle 5 is composed of a thick bone part 6 at the front and a bone part 7 at the tip, and the bone part 7 is inserted into a body such as a human body. Since the bone part 7 also has multiple tubes, it can be used for injecting two types of drugs into the body at the same time, or for supplying drugs or physiological saline etc. into the body at the same time as blood is removed from the body as a blood donation. It is something that can be done.
（発明の効果）以上述べたように、請求項１に記載された発明によれば
、外管と内管及び内管同士の少なくとも一部が面接触す
るようにしたので、従来の多重金属管と比較して、その
面接触している分だけ外管の径に対する内管内の断面積
の合計の割合が高くすることができ、細くても流量を大
きくすることができる多重金属管を提供することができ
る。また、請求項２に記載された発明によれば、外管を
引き抜き加工して管径を絞ることで内管も含めて変形さ
せて多重金属管を製造するようにしたので、外管及び内
管の寸法がラフであってもその誤差を管径の絞りにより
吸収することができ、設計、製作上有利である。さらに
、請求項３に記載された発明によれば、注射針において
、多重管としたので、それぞれの内管には異なった液体
又は気体を同時に注入又は吸入することができ、多様な
用途に利用できるものである。(Effects of the Invention) As described above, according to the invention set forth in claim 1, the outer tube and the inner tube and at least a portion of the inner tubes are in surface contact with each other, so that To provide a multilayer metal tube that can increase the ratio of the total cross-sectional area inside the inner tube to the diameter of the outer tube by the amount of surface contact, and can increase the flow rate even if it is thin. be able to. Furthermore, according to the invention described in claim 2, the outer tube is drawn and the inner tube is deformed by narrowing the tube diameter to produce a multilayer metal tube. Even if the dimensions of the tube are rough, the error can be absorbed by restricting the tube diameter, which is advantageous in terms of design and manufacturing. Furthermore, according to the invention described in claim 3, since the injection needle has multiple tubes, different liquids or gases can be simultaneously injected or inhaled into each inner tube, and can be used for various purposes. It is possible.
第１図はこの発明の一実施例を示し、第１図（ａ）は引
き抜き加工前の状態を示す断面図、第１図（ｂ）は引き
抜き加工時の状態を示す断面斜視図、第１図（ｃ）は引
き抜き加工前後状態を示す断面図であり、第２図はこの
発明の他の実施例を示す斜視図、第３図は従来例を示す
断面図である。１１１、外管、２・・・内管、４・・・ダイス、５・・
・注射針。FIG. 1 shows one embodiment of the present invention, FIG. 1(a) is a sectional view showing the state before drawing, FIG. 1(b) is a sectional perspective view showing the state during drawing, and FIG. Figure (c) is a sectional view showing the state before and after the drawing process, FIG. 2 is a perspective view showing another embodiment of the present invention, and FIG. 3 is a sectional view showing a conventional example. 111, outer tube, 2...inner tube, 4...dice, 5...
·Needle.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2076078AJPH03275214A (en) | 1990-03-26 | 1990-03-26 | Multilayered metallic pipe, manufacture thereof and injecting needle |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2076078AJPH03275214A (en) | 1990-03-26 | 1990-03-26 | Multilayered metallic pipe, manufacture thereof and injecting needle |
| Publication Number | Publication Date |
|---|---|
| JPH03275214Atrue JPH03275214A (en) | 1991-12-05 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2076078APendingJPH03275214A (en) | 1990-03-26 | 1990-03-26 | Multilayered metallic pipe, manufacture thereof and injecting needle |
| Country | Link |
|---|---|
| JP (1) | JPH03275214A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06269853A (en)* | 1993-03-18 | 1994-09-27 | Toshida Kogyo Kk | Manufacture of double walled steel tube |
| US6146361A (en)* | 1996-09-26 | 2000-11-14 | Becton Dickinson And Company | Medication delivery pen having a 31 gauge needle |
| JP2010078062A (en)* | 2008-09-26 | 2010-04-08 | Nippon Steel Corp | Collision energy absorbing steel pipe and method for manufacturing the same |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06269853A (en)* | 1993-03-18 | 1994-09-27 | Toshida Kogyo Kk | Manufacture of double walled steel tube |
| US6146361A (en)* | 1996-09-26 | 2000-11-14 | Becton Dickinson And Company | Medication delivery pen having a 31 gauge needle |
| US6200296B1 (en) | 1996-09-26 | 2001-03-13 | Becton Dickinson And Company | 5mm injection needle |
| JP2010078062A (en)* | 2008-09-26 | 2010-04-08 | Nippon Steel Corp | Collision energy absorbing steel pipe and method for manufacturing the same |
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