JP2005334542A - Medical tube and its joining method - Google Patents
Medical tube and its joining method Download PDFInfo
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- JP2005334542A JP2005334542A JP2004160865A JP2004160865A JP2005334542A JP 2005334542 A JP2005334542 A JP 2005334542A JP 2004160865 A JP2004160865 A JP 2004160865A JP 2004160865 A JP2004160865 A JP 2004160865A JP 2005334542 A JP2005334542 A JP 2005334542A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
- B29C66/1162—Single bevel to bevel joints, e.g. mitre joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
- B29C66/12841—Stepped joint cross-sections comprising at least one butt joint-segment comprising at least two butt joint-segments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/14—Particular design of joint configurations particular design of the joint cross-sections the joint having the same thickness as the thickness of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/61—Joining from or joining on the inside
- B29C66/612—Making circumferential joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/63—Internally supporting the article during joining
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
- B29C66/7314—Electrical and dielectric properties
- B29C66/73143—Dielectric properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
- B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/753—Medical equipment; Accessories therefor
- B29L2031/7542—Catheters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
Description
本発明は、血管等の人体の管状器官に挿入して用いられ、2本以上のチューブを接合して形成される医療用チューブ及びその接合方法に関する。 The present invention relates to a medical tube that is used by being inserted into a tubular organ of a human body such as a blood vessel and formed by joining two or more tubes, and a joining method thereof.
血管、尿管、胆管、気管等の人体の管状器官における検査・治療のため、医療用チューブを挿入して造影剤等の薬剤を投与したり、医療用チューブを通して鉗子等によって組織の一部を採取したりすることが行われている。この医療用チューブは、用途や目的に応じて、複数のチューブが接合されて用いられることがある。 Insert a medical tube and administer contrast agents, etc., or force a part of tissue through forceps etc. for inspection and treatment of human organs such as blood vessels, ureters, bile ducts, and trachea It is being collected. This medical tube may be used by joining a plurality of tubes depending on the application or purpose.
下記特許文献1には、芯棒に外径が一致するように設けられた金属部材上でカテーテル本体部のチューブと先端部のチューブとの端面同志を突き合わせ、その端面突き合わせ部上にチューブの外径と一致する内径の金属リングを嵌合し、かかる芯棒付帯の金属部材と金属リングとを電気的誘導により発熱させてチューブの端面突き合わせ部を内外から加熱して整形しつつ熱融着して接合することを特徴とするカテーテルの製造方法が開示されている。 In the following Patent Document 1, the end surfaces of the tube of the catheter main body and the tube of the distal end portion are butted on a metal member provided so that the outer diameter of the core rod matches, and the outer surface of the tube is placed on the end surface butting portion. A metal ring with an inner diameter that matches the diameter is fitted, and the metal member attached to the core bar and the metal ring are heated by electrical induction, and the end face butting portion of the tube is heated from inside and outside and heat-sealed while shaping. A method for manufacturing a catheter is disclosed.
また、下記特許文献2には、共に芯棒に通されたカテーテル本体のトルク部チューブとその末端に接合して延長させる先端部チューブとを、その先端部チューブの後端をラッパ状に拡げてトルク部チューブの末端上に被せ、その重合部分を外面から加圧しつつ加熱して熱融着一体化する方法において、トルク部チューブの末端面の前方で先端部チューブのラッパ状部分の内側に形成される継ぎ目の内空隙に先端部チューブと同一材料で作られた環状の部材を配し、その環状の部材をかかる加熱時にトルク部チューブの末端面と先端部チューブのラッパ状部分の内面とに熱融着一体化して内面継ぎ目を平滑に仕上げることを特徴とするカテーテルの製造方法が開示されている。
上記特許文献1の接合方法のように、チューブとチューブとの端面同士を突き合わせて接合する方法では、チューブの肉厚分のみが接触した状態で、接着又は溶着されているので、接触面積が極めて小さく接合強度が不足してしまうことが多かった。 In the method in which the end surfaces of the tubes are brought into contact with each other as in the joining method of Patent Document 1, the contact area is extremely large because only the thickness of the tube is in contact with each other. In many cases, the bonding strength was insufficient.
また、上記特許文献2のカテーテルの製造方法では、重ね合って肉厚となった部分を、チューブの外周及び内周の各表面から加熱し、チューブの端部同士が面接触して接合している部分(以下、単に接合部という)を溶融して接合している。しかしながら、重ね合った部分は二重壁となるため、外周を平滑にすることは困難であり、外径が部分的に太くなったり、また、無理に平滑にすればチューブが変形したりする可能性があった。 Moreover, in the manufacturing method of the catheter of the said patent document 2, the part which overlapped and became thick is heated from each surface of the outer periphery and inner periphery of a tube, and the edge parts of a tube are surface-contacted and joined. The melted part (hereinafter simply referred to as a joint) is joined. However, since the overlapped part becomes a double wall, it is difficult to smooth the outer periphery, and the outer diameter can be partially thickened, or the tube can be deformed if forcibly smoothed. There was sex.
また、重ね合って肉厚となった接合部が他の部分に比べて硬くなりやすく、チューブの剛性が局部的に変化してしまう可能性がある。そのため、チューブの屈曲性に問題が生じ、屈曲した血管内に挿入する際に挿入しにくくなる可能性があった。 In addition, the joint portion that is overlapped and thickened is likely to be harder than other portions, and the rigidity of the tube may be locally changed. For this reason, there is a problem in the flexibility of the tube, which may be difficult to insert when inserted into a bent blood vessel.
更に、重ね合って二重壁となった接合部を、十分に加熱して溶融させようとすると、チューブ表面が必要以上に加熱されてしまい、劣化や変形が生じやすく、変形によって血管内に留置する際に抵抗となったり、制癌剤等の薬液注入時の妨げとなったりする恐れが生じる可能性があった。 Furthermore, if the joints that are overlapped to form a double wall are sufficiently heated and melted, the tube surface will be heated more than necessary, which tends to cause deterioration and deformation, and the deformation will leave it in the blood vessel. When doing so, there is a possibility that it may become resistance or hinder the injection of a chemical solution such as an anticancer drug.
したがって、本発明の目的は、チューブ同士を接合する際に、チューブとチューブとの接合強度を十分に高くすることができるとともに、接合部の外径及び内径の双方を平滑な表面とすることができ、チューブの剛性が局部的に変化しないようにし、しかも、チューブ表面を劣化させたり、変形させたりすることがない医療用チューブ及びその接合方法を提供することにある。 Accordingly, an object of the present invention is to sufficiently increase the bonding strength between the tubes when the tubes are bonded to each other, and to make both the outer diameter and inner diameter of the bonded portion a smooth surface. Another object of the present invention is to provide a medical tube and a method for joining the same, which can prevent the tube stiffness from being locally changed and does not deteriorate or deform the tube surface.
上記目的を達成するため、本発明の第1は、熱可塑性樹脂からなる2本以上のチューブを接合して形成される医療用チューブにおいて、端部の外径を縮径した一方のチューブと、端部の内径を拡径した他方のチューブとを有し、前記一方のチューブの端部を、前記他方のチューブの端部に挿入し、両チューブの接合部が溶着されて接合していることを特徴とする医療用チューブを提供するものである。 In order to achieve the above object, the first of the present invention is a medical tube formed by joining two or more tubes made of a thermoplastic resin, one tube having a reduced outer diameter of an end portion, And having the other tube with an enlarged inner diameter at the end, inserting the end of the one tube into the end of the other tube, and welding and joining the joints of both tubes A medical tube characterized by the above is provided.
上記第1の発明によれば、外径を縮径した一方のチューブの端部と、内径を拡径した他方のチューブの端部とを、互いに接触させた状態で接合するので、接触面積を大きく確保することができ、従来のように、チューブの端面同士を突き合わせた状態で接合する場合と比べて、チューブ同士の接合強度を十分に高くすることができる。 According to the first aspect of the invention, the end of one tube whose outer diameter is reduced and the end of the other tube whose inner diameter is increased are joined in a state of being in contact with each other. As compared with the case where the end faces of the tubes are joined to each other as in the conventional case, the joining strength between the tubes can be sufficiently increased.
また、外径を縮径した一方のチューブの端部と、内径を拡径した他方のチューブの端部とを、重ね合わせた接合部の肉厚は、接合部以外のチューブの肉厚と比較しても、ほぼ変わらなくなる。そのため、チューブの接合部を、外径側にも内径側にも段差を生じさせることがなく、平滑な表面とすることができる。しかも、接合部が肉厚ではないので、チューブの剛性が局部的に変化することがない。 In addition, the thickness of the joint where the end of one tube whose outer diameter is reduced and the end of the other tube whose inner diameter is increased is compared with the thickness of the tube other than the joint Even so, it is almost unchanged. Therefore, the joining portion of the tube can be made a smooth surface without causing a step on the outer diameter side or the inner diameter side. Moreover, since the joint is not thick, the rigidity of the tube does not change locally.
また、チューブの接合部を加熱溶着する際に、重ね合わせた接合部の肉厚が比較的薄いので、加熱溶着しやすく、チューブ表面を劣化させたり、変形させたりすることがなく、接合作業の作業性も向上させることができる。 Also, when the welded part of the tube is heat-welded, the thickness of the overlapped joined part is relatively thin, so that it is easy to heat-weld and the tube surface is not deteriorated or deformed. Workability can also be improved.
本発明の第2は、前記第1の発明において、前記チューブは、印加周波数1MHzでの、温度20℃における誘電損失ε・tanδ(ε:誘電率、tanδ:誘電力率)が0.012以上で、0.7以下である材料からなる医療用チューブを提供するものである。 According to a second aspect of the present invention, in the first aspect, the tube has a dielectric loss ε · tanδ (ε: dielectric constant, tanδ: dielectric power factor) of 0.012 or more at an applied frequency of 1 MHz and a temperature of 20 ° C. Thus, a medical tube made of a material of 0.7 or less is provided.
上記第2の発明によれば、前述した誘電加熱を行う際に、前記チューブが効率的に発熱するようになるので、チューブ表面の劣化や変形が少なく、容易に接合できる医療用チューブが得られる。 According to the second aspect of the invention, when the dielectric heating described above is performed, the tube efficiently generates heat, so that a medical tube that can be easily joined with little deterioration and deformation of the tube surface is obtained. .
本発明の第3は、外径を縮径した一方のチューブの端部を、内径を拡径した他方のチューブの端部に挿入し、少なくとも両チューブの接合部の内周に至るように導電性の芯金を挿入し、前記接合部外周には導電性の型枠を配置して、両チューブの接合部を挟み、前記導電性の芯金と前記導電性の型枠との間に高周波電圧を印加し、誘電加熱により両チューブの接合面を溶着させて接合することを特徴とする医療用チューブの接合方法を提供するものである。 According to the third aspect of the present invention, the end of one tube whose outer diameter is reduced is inserted into the end of the other tube whose inner diameter is increased, so that at least the inner circumference of the joint portion of both tubes is reached. A conductive metal core is inserted, a conductive mold is disposed on the outer periphery of the joint, the joint between both tubes is sandwiched, and a high frequency is provided between the conductive core and the conductive mold. The present invention provides a method for joining medical tubes, characterized by applying a voltage and welding the joining surfaces of both tubes by dielectric heating.
上記第3の発明によれば、外径を縮径した一方のチューブの端部を、内径を拡径した他方のチューブの端部に挿入したので、各チューブの端部同士の接触面積を大きく確保することができる。 According to the third aspect of the invention, since the end portion of one tube whose outer diameter is reduced is inserted into the end portion of the other tube whose inner diameter is increased, the contact area between the end portions of the respective tubes is increased. Can be secured.
その状態で、両チューブの接合部の内周に導電性の芯金を挿入し、接合部の外周に導電性の型枠を配置して、両チューブの接合部を挟み、芯金と型枠との間に高周波電圧を印加することにより、チューブ同士を広い接触面積で接合して、チューブの接合部の接合強度をより高くすることができる。 In that state, a conductive metal core is inserted into the inner periphery of the joint portion of both tubes, a conductive mold is placed on the outer periphery of the joint portion, and the joint portion of both tubes is sandwiched between the core metal and the mold frame. By applying a high-frequency voltage between them, the tubes can be joined with a wide contact area, and the joining strength of the joined portion of the tubes can be further increased.
また、接合部の肉厚と接合部以外のチューブの肉厚とはほとんど変わらないので、加熱溶着が容易になされ、チューブの接合部を、外径側にも内径側にも段差を生じさせることがなく、平滑な表面とすることができ、かつ、チューブの剛性が局部的に変化したりしないようにすることができる。 In addition, since the thickness of the joint and the thickness of the tube other than the joint are almost the same, heat welding is facilitated, and a step is created between the outer diameter side and the inner diameter side of the tube joint. Therefore, the surface can be smooth and the rigidity of the tube can be prevented from changing locally.
更に、誘電加熱することにより、誘電加熱の特性としてチューブの材料自身が発熱するため、上記特許文献1、2のように、チューブ接合部の外部から加熱するような場合と比べて、接触面が効率的に加熱され、均一にかつ迅速に加熱溶着がなされるので、接合作業の作業性が極めて向上する。 Furthermore, since the tube material itself generates heat as a characteristic of the dielectric heating due to the dielectric heating, the contact surface is less than in the case of heating from the outside of the tube joint as in Patent Documents 1 and 2. Since it is heated efficiently and uniformly and rapidly heat-welded, the workability of the joining work is greatly improved.
本発明の第4は、前記第3の発明において、前記チューブは、印加周波数1MHzでの、温度20℃における誘電損失ε・tanδ(ε:誘電率、tanδ:誘電力率)が0.012以上で、0.7以下である材料からなる医療用チューブの接合方法を提供するものである。 According to a fourth aspect of the present invention, in the third aspect, the tube has a dielectric loss ε · tanδ (ε: dielectric constant, tanδ: dielectric power factor) of 0.012 or more at an applied frequency of 1 MHz and a temperature of 20 ° C. Thus, the present invention provides a method for joining medical tubes made of a material of 0.7 or less.
上記第4の発明によれば、前述した誘電加熱を行う際に、前記チューブが効率的に発熱するようになるので、チューブ表面の劣化や変形が少なく、容易に接合することができるようになる。 According to the fourth aspect of the invention, when the dielectric heating described above is performed, the tube efficiently generates heat, so that the tube surface is less deteriorated and deformed and can be easily joined. .
本発明の医療用チューブ及びその接合方法によれば、チューブ同士の接合強度を高めることができるとともに、チューブの接合部を、外径側にも内径側にも段差を生じさせることがなく、平滑な表面とすることができ、チューブの剛性が局部的に変化しないようにすることができる。また、重ね合わせた接合部の肉厚が比較的薄いので、加熱溶着しやすく、チューブ表面を劣化させたり、変形させたりすることがない。更に、誘電加熱によりチューブ自体が内部から発熱するので、均一にかつ迅速に加熱溶着がなされるので、接合作業の作業性が極めて向上する。 According to the medical tube and the joining method thereof of the present invention, the joining strength between the tubes can be increased, and the joined portion of the tube is smooth without causing a step on the outer diameter side or the inner diameter side. And the tube stiffness can be kept from changing locally. Moreover, since the thickness of the overlapped joining portion is relatively thin, it is easy to heat-weld and the tube surface is not deteriorated or deformed. Furthermore, since the tube itself generates heat from the inside by dielectric heating, heat welding is performed uniformly and quickly, so that the workability of the joining work is greatly improved.
以下、図1〜3を参照して、本発明の医療用チューブ及びその接合方法についての一実施形態を説明する。 Hereinafter, with reference to FIGS. 1-3, one Embodiment about the medical tube and its joining method of this invention is described.
図1(a)には、本発明の医療用のチューブ10(以下、チューブ10という)に用いられる接合すべきチューブ20、30が示されている。図1(b)を併せて参照すると、一方のチューブ20の端部は、外径が縮径した形状、すなわち、チューブ端部に沿って次第に先細となったテーパー部21が形成されている。他方のチューブ30の端部は、内径が拡径した形状、すなわち、チューブ端部に沿って次第に拡径したテーパー部31が形成されている。
FIG. 1 (a)
このチューブ20、30の材料としては、印加周波数1MHzでの、温度20℃における誘電損失ε・tanδ(ε:誘電率、tanδ:誘電力率)が0.012以上で、0.7以下であって誘電加熱した際に発熱しやすい材料、例えば、ポリウレタン、ポリ塩化ビニル、ポリビニルアルコール、ポリ酢酸ビニル、ポリエステル、ポリアミド、及びこれらの共重合体等の分子内に双極子を有する合成樹脂が好ましく用いられる。これによれば、チューブが効率的に発熱するので、容易に接合することができる。なお、分子内に双極子を有さないポリエチレン等のオレフィン系の樹脂材料は、通常、単体では発熱しにくいので好ましくない。
As the material of the
また、テーパー部21を形成する際には、チューブ自体を回転させて、ヤスリやバイト、その他の研削工具により研削するか、チューブを材料の軟化点以上に加熱された型に押し当てるか、或いは、射出成形等の成形手段により、予め形成される。一方、テーパー部31を形成する際には、リューター(ルーターともいう)とよばれる先端のビット部が回転する電気工具を使用し、ビット部をチューブ端部に挿入して研削するか、或いは、射出成形等の成形手段により、予め形成される。
Further, when forming the
そして、チューブ30の端部に、チューブ20の端部を挿入して、テーパー部21と31とを接触させた状態で、チューブの接合装置により、チューブ20とチューブ30とが溶着されることとなる。図2には、この場合に用いられるチューブの接合装置100が示されている。
Then, the
同図に示される基台110は、絶縁性の材料で形成されている。この基台110の上面には、上下型からなる型枠120の下型121が配設されている。一方、型枠120の上型122は、電極130に固設されている。この電極130には、図示しないエアシリンダ等が備え付けられており、上下方向に昇降可能となっている。そして、常時は電極130及び上型122を、下型121から離反した位置に配置させておき、チューブを接合する際には下降させて、上型122と下型121とを当接させる。
The base 110 shown in the figure is formed of an insulating material. On the upper surface of the
前記型枠120は、例えば、Al、Al合金、Fe合金、Cu―Zn系合金等の金属材料で形成されている。この中でも、導電性が良好なCu―Zn系合金が好ましく用いられる。
The
また、下型121の上部の中央、及び、上型122の下部の中央には、それぞれ半円状の切欠き121a、122aが設けられており、上型122と下型121とが当接したときに円形状となるようになっている。この円形状の内径は、チューブ30の外径よりも、やや小さく設定されており、上下の型122、121を閉じたとき、切欠き122a、121aの内周によって、チューブの接合部Cが押圧されるようになっている。
Also,
更に、チューブ20、30に挿入される導電性の芯金140が配置されている。この芯金140は、チューブ20、30の内径よりも、やや小さい外径で形成されている。また、この芯金140は、図3(a)のように、先端部に拡径部141を設けた形状をなしていてもよい。この拡径部を設けた芯金によれば、チューブの接合部Cの内周を効率よく発熱させることが可能となる。
Further, a
この芯金140の一端には、リード線150の一端が接続されている。このリード線150の途中には、高周波電圧発生源160が接続されている。また、リード線150の他端は、前記電極130に接続されて上型122にも導通している。
One end of the
このようなチューブの接合装置100を使用して、チューブ20とチューブ30とを次のようにして接合する。
Using such a
まず、図1(a)に示される、テーパー部21、31が形成されたチューブ20、30を、図1(b)のように、チューブ30の端部にチューブ20の端部を挿入して、テーパー部21と31とを接触させる。このように、テーパー部21と31とが接触するので、チューブ20と30との端部同士の接触面積を大きく確保することができる。
First, the
そして、図3(a)のように、芯金140を、チューブの内部に挿入していく。この場合、芯金140の先端部を、少なくとも両チューブ20、30の接合部の内周に至る位置にまで挿入する。
Then, the cored
次に、芯金140が内部に挿入されたチューブの接合部Cを、チューブの接合装置100の下型121に設けられた半円状の切欠き121aに載置する。そして、電極130に設けられたエアシリンダを作動させて、上型122を下降させて、上型122と、下型121とを当接させる。このように、両チューブの接合部Cの内周に導電性の芯金140を挿入し、導電性の型枠120によって接合部Cの外周を押圧したので、チューブの接合部Cは外周及び内周から押圧されることとなる。
Next, the joint portion C of the tube in which the
そして、接合部Cが押圧された状態で、リード線150に高周波電圧発生源160により発生させた高周波電圧を、芯金140と、上型122及び下型121との間に印加する。すると、高周波電圧によって、チューブの接合部Cが誘電加熱されて溶融状態となり、芯金140と型枠120との間で押圧されつつ溶着されて、チューブの接合部Cが接合され、図3(b)に示されるチューブ10が形成される。
Then, the high frequency voltage generated by the high frequency
このように、外径を縮径した一方のチューブ20の端部と、内径を拡径した他方のチューブ30の端部とを、互いに接触させた状態で接合するので、接触面積を大きく確保することができ、従来のように、チューブの端面同士を突き合わせた状態で接合する場合と比べて、チューブ同士の接合強度を十分に高くすることができる。
Thus, since the end of one
また、外径を縮径した一方のチューブ20の端部と、内径を拡径した他方のチューブ30の端部とを、重ね合わせた接合部Cの肉厚は、接合部C以外のチューブの肉厚と比較しても、ほぼ変わらなくなる。そのため、チューブの接合部Cを、外径側にも内径側にも段差を生じさせることがなく、平滑な表面とすることができるので、細い血管等にも挿入しやすく、血管の分岐部等に引っ掛かることもなく、チューブの内側にてガイドワイヤが引っ掛かったりすることもなくなる。しかも、接合部Cが肉厚ではないので、チューブの剛性が局部的に変化せず、屈曲した血管内でも挿入しやすくなる。
In addition, the thickness of the joint portion C in which the end portion of one
更に、誘電加熱することにより、誘電加熱の特性としてチューブの材料自身が発熱するため、チューブの接合部Cを外部から加熱するような場合と比べて、接触面が効率的に加熱され、均一にかつ迅速に加熱溶着がなされるので、接合作業の作業性が極めて向上する。 Furthermore, since the tube material itself generates heat as a characteristic of dielectric heating due to dielectric heating, the contact surface is heated more efficiently and uniformly compared to the case where the joint C of the tube is heated from the outside. Moreover, since heat welding is performed quickly, the workability of the joining work is greatly improved.
また、重ね合わせた接合部Cの肉厚が厚くならないので、加熱溶着がスムーズになされ、チューブ表面を劣化させたり、変形させたりすることがなくなる。そのため、チューブを血管内に留置する際の抵抗となったり、制癌剤等の薬液注入時の妨げとなったりすることもなくなる。 In addition, since the thickness of the overlapped joint portion C does not increase, heat welding is performed smoothly, and the tube surface is not deteriorated or deformed. Therefore, it does not become a resistance when the tube is placed in the blood vessel, and does not obstruct the injection of a chemical solution such as an anticancer drug.
本発明の医療用チューブの接合方法は、既存のチューブや、様々な形状のチューブの接合に適用できる。 The medical tube joining method of the present invention can be applied to joining existing tubes and tubes of various shapes.
例えば、金属線材や樹脂線材を交互に交差させて形成した、いわゆる編組材を埋設して補強したチューブを本体とし、これに柔軟なチューブを接合した医療用チューブに適用できる。この医療用チューブは、チューブ本体を補強したことにより、トルク伝達性やプッシュアビリティを確保し、チューブ先端を柔軟としたことにより、管状器官内の内壁を損傷させないようにしている。 For example, the present invention can be applied to a medical tube in which a metal tube or a resin wire is alternately intersected and formed by embedding and reinforcing a so-called braided material as a main body, and a flexible tube is joined to the tube. In this medical tube, the tube body is reinforced to ensure torque transmission and pushability, and the tube tip is made flexible so that the inner wall of the tubular organ is not damaged.
また、柔軟なチューブ本体と、コイル等を内周に配置して、血管内壁に圧接されるように付形したチューブ先端部とを、接合した医療用チューブにも適用できる。この医療用チューブは、チューブ先端部によって血管の内壁にしっかりと固定され、制癌剤等の薬液が注入されるようになっている。 Moreover, it is applicable also to the medical tube which joined the flexible tube main body and the tube front-end | tip part shape | molded so that a coil etc. may be arrange | positioned in an inner periphery and it may press-contact with the blood vessel inner wall. This medical tube is firmly fixed to the inner wall of the blood vessel by the distal end of the tube, and a medical solution such as an anticancer drug is injected.
なお、薬液を注入するためのチューブとしては、図4に示される形状の医療用チューブを用いてもよい。同図にはこの医療用チューブ及びその接合方法が示されている。 In addition, as a tube for inject | pouring a chemical | medical solution, you may use the medical tube of the shape shown by FIG. This figure shows this medical tube and its joining method.
この医療用チューブは、一方のチューブ30の先端面が弾性材料からなる先端壁32で閉塞され、この先端壁32は中央部が肉薄となっており、その肉薄部分に図示しない孔又は切り込みが形成され、この孔又は切り込みは、常時は閉じると共に、内外両方向からガイドワイヤを押し当てると弾性的に開いてガイドワイヤを挿通可能とされている。しかも前記先端壁32の周縁は、チューブ20の先端部をなしている。
In this medical tube, the distal end surface of one
この際の一方のチューブ30は、ディッピングや、射出成形により形成されており、これに接合する他方のチューブ20は、押し出し成形により形成されている。なお、一方のチューブ30を前述したように、血管内壁に圧接されるように付形した形状としてもよい。
One
本発明によれば、上述したような、射出成形等により形成された先端壁32を有する一方のチューブ30と、押し出し成形等により形成される他方のチューブ20とでも、接合強度を高くして接合することができる。
According to the present invention, the one
なお、図4に示す医療用チューブ内に薬液を注入すると、薬液の圧力によりチューブ20の先端壁32に形成された孔又は切り込みが、弾性的に拡開して目的箇所に薬液が注入され、薬液注入後は先端壁32が弾性復帰して閉塞し、血液のチューブ内への逆流を防止するようになっている。
When the drug solution is injected into the medical tube shown in FIG. 4, the hole or notch formed in the
また、ガイドワイヤをチューブの先端側、及び後端側から挿通できるので、ガイドワイヤを先に血管内に挿入して、ガイドワイヤに沿ってチューブを挿入することができ、また、チューブの留置位置を修正したい場合でも、チューブの後端側からガイドワイヤを挿入して位置修正が可能となっている。 In addition, since the guide wire can be inserted from the distal end side and the rear end side of the tube, the guide wire can be inserted into the blood vessel first, and the tube can be inserted along the guide wire. Even when it is desired to correct the position, it is possible to correct the position by inserting a guide wire from the rear end side of the tube.
図5には、本発明による医療用チューブ10及びその接合方法の他の例が示されている。ここで用いられるチューブ20a、30aは、前述のチューブ20、30と比べ、端部の形状が異なっている。すなわち、図5(a)に示されるように、チューブ20aの端部には、一定径で縮径した縮径段部21aが設けられている。一方、チューブ30aの端部には、一定径で拡径した拡径段部31aが設けられている。そして、チューブ30aの端部に、チューブ20aの端部を挿入して、縮径段部21aと拡径段部31aとを接触させて配置して、芯金140を挿入し、型枠120で接合部Cを押圧した状態で、高周波電圧を印加して接合部Cを誘電加熱して接合することにより、図5(b)に示される医療用チューブ10を形成することができる。
FIG. 5 shows another example of the
実施例
図1に示す形状の複数のチューブを作製し、これらを接合した。
Example A plurality of tubes having the shape shown in FIG. 1 were prepared and joined together.
まず、ポリウレタンを用い、チューブ押し出し成形機によって、外径1.7mm、内径1.0mmのチューブ20、30を成形した。
First,
そして、一方のチューブを回転させつつ、ヤスリを押し当てて、テーパー部21を形成し、チューブ20を得た。
Then, while rotating one of the tubes, the file was pressed to form the tapered
また、他方のチューブの端部に、加熱された金属製のテーパー状のマンドレルを挿入して回転させて、テーパー部31を形成し、チューブ30を得た。
Further, a heated metal tapered mandrel was inserted into the end of the other tube and rotated to form a tapered
そして、チューブ30の端部に、チューブ20の端部を挿入して、テーパー部21と31とを接触させた。この際の接合部Cの外径は、1.75mmであった。
And the edge part of the
次に、チューブ内に、外径が1.0mmの芯金140を挿入した。
Next, a cored
そして、図3に示す接合装置100の下型121の切欠き121aに、チューブの接合部Cを載置して、エアシリンダを作動させて上型122を下降させ、下型121と当接させた。なお、切欠き121aの内径は1.7mmであった。
3 is placed in the
また、芯金140にリード線の一端を接続し、他端を電極130に接続し、上型122と導通させた。なお、リード線の途中には、高周波電圧発生源160が接続されている。
In addition, one end of the lead wire was connected to the cored
この状態で、高周波電圧発生源160により、印加周波数40.46MHz、出力250Wの高周波電圧を印加した。すると、チューブの接合部Cが発熱して溶融し、チューブ20とチューブ30とが接合した医療用チューブ10を得られた。
In this state, a high frequency voltage having an applied frequency of 40.46 MHz and an output of 250 W was applied from the high frequency
こうして得られた医療用チューブ10の両端部を引っ張ったところ、しっかりと接合していることが確認できた。また、目視により確認したが、チューブ表面の劣化や変形は確認されず、平滑な表面が得られた。
When the both ends of the
試験例
各種の方法で接合したチューブを、引張試験機によって引張って、接合部Cの接合強度を測定した。試料は下記の通りである。
Test Example Tubes joined by various methods were pulled by a tensile tester, and the joint strength of the joint C was measured. Samples are as follows.
試料1
上記実施例で作製したチューブ20、30の接合部Cを、誘電加熱によって加熱溶着することにより接合して、試料1を得た。
Sample 1
Sample 1 was obtained by joining the joints C of the
試料2
上記実施例で作製したチューブ20、30の接合部Cを、その外部から、熱風を吹き付けて加熱溶着することにより接合して、試料2を得た。
Sample 2
Sample 2 was obtained by joining the joints C of the
試料3
上記実施例で作製したチューブ20のテーパー部21に、溶剤であるテトラヒドロフラン(THF)を微量滴下してその面を溶かし、その後、チューブ30のテーパー部31に挿入して、数時間放置することにより接合部Cを溶着して、試料3を得た。
Sample 3
By adding a small amount of tetrahydrofuran (THF) as a solvent to the tapered
試料4
上記実施例において、押し出し成形機によって成形切断したままで、テーパー加工を施していないチューブの端面同士を突き当てて、接合部Cを誘電加熱によって加熱溶着することにより接合して、試料4を得た。
Sample 4
In the above embodiment, the end surfaces of the tubes not subjected to taper processing are abutted with each other while being cut and formed by the extrusion molding machine, and the joining portion C is joined by heating and welding by dielectric heating to obtain a sample 4. It was.
試料5
上記実施例において、押し出し成形機によって成形切断したままで、テーパー加工を施していないチューブの端面同士を突き当てて、接合部Cの外部から熱風を吹き付けて、接合部Cを加熱溶着することにより接合して、試料5を得た。
Sample 5
In the above-described embodiment, the end faces of the tubes that have not been subjected to the taper processing are abutted with each other while being cut and formed by the extrusion molding machine, and hot air is blown from the outside of the joint C to heat and weld the joint C. The sample 5 was obtained by bonding.
試料6
上記実施例において、押し出し成形機によって成形切断したままで、テーパー加工を施していないチューブの一方の端面に、溶剤であるテトラヒドロフラン(THF)を微量滴下してその面を溶かし、その後、チューブの端面同士を突き当てて、数時間放置することにより接合部Cを溶着して、試料6を得た。
Sample 6
In the above-described embodiment, a small amount of tetrahydrofuran (THF) as a solvent is dropped on one end surface of a tube that has not been subjected to taper processing while being cut by an extrusion molding machine, and then the surface is melted. The joints C were welded by abutting each other and allowed to stand for several hours to obtain a sample 6.
以上のような試料1〜6を、その接合部Cが中央になるようにチャックで挟みこみ、その状態で、500mm/分の速度で引張って、接合部Cが破断した際の荷重を測定した。なお、この試験は各試料について3回ずつ行い、その結果を表1に示す。また、試料1〜6の接合部Cの外観を、4段階(◎・・良い、○・・普通、△・・悪い、×・・大変悪い)で評価し、その結果を表1に併せて示した。 Samples 1 to 6 as described above were sandwiched between chucks so that the joint C was in the center, and in that state, the sample was pulled at a speed of 500 mm / min to measure the load when the joint C was broken. . This test was performed three times for each sample, and the results are shown in Table 1. In addition, the appearance of the joint C of Samples 1 to 6 was evaluated in four stages (◎ ··· Good, ○ ··· Normal, Δ ··· Bad, × ·· Very bad), and the results are also shown in Table 1. Indicated.
この表1に示されるように、接合部Cを突き当てて接合する試料4〜6よりも、両端をテーパー加工した試料1〜3の方が、接合強度が高いことがわかる。特にテーパー加工を施し、かつ誘電加熱により接合した試料1は、テーパー加工を施して溶剤による溶着により接合した試料3に比べて、測定ごとのバラツキが少なく、安定して高い接合強度が得られた。 As shown in Table 1, it can be seen that Samples 1 to 3 in which both ends are tapered are higher in bonding strength than Samples 4 to 6 in which the joining portion C is abutted and joined. In particular, Sample 1 that was tapered and joined by dielectric heating had less variation for each measurement and stable and high joint strength compared to Sample 3 that was tapered and joined by solvent welding. .
また、接合部Cを突き当てて接合する試料4〜6は、チューブの長手方向に押し当てる必要があるため変形が著しく、接合部Cの外観が悪かった。これに対し、テーパー加工した試料1〜3の接合部Cは、外観が比較的良く、特にテーパー加工を施し、かつ誘電加熱により接合した試料1の接合Cの外観が、試料の中で最も良く、テーパー加工及び誘電加熱の併用が極めて良い効果をもたらすことが理解できる。 Moreover, since it was necessary to press the joining part C and the samples 4-6 which are joined to the longitudinal direction of a tube, deformation | transformation was remarkable and the external appearance of the joining part C was bad. On the other hand, the joints C of the samples 1 to 3 subjected to the taper processing have a relatively good appearance, and in particular, the appearance of the joint C of the sample 1 subjected to the taper processing and bonded by dielectric heating is the best among the samples. It can be understood that the combined use of the taper processing and the dielectric heating has a very good effect.
本発明は、チューブ同士を接合する際に、チューブとチューブとの接合強度を十分に高くすることができ、かつ、接合部の外径及び内径の双方を平滑な表面とすることができ、チューブの剛性をどの箇所でも均一に保つことが可能で、チューブ表面を劣化させたり、変形させたりすることもない医療用チューブ及びその接合方法として利用することができる。 In the present invention, when joining tubes, the joining strength between the tubes can be made sufficiently high, and both the outer diameter and inner diameter of the joined portion can be made a smooth surface. It can be used as a medical tube and its joining method that can maintain the rigidity of the tube uniformly at any location and does not deteriorate or deform the tube surface.
10 医療用チューブ
20、30 チューブ
120 型枠
140 芯金
C 接合部
DESCRIPTION OF
Claims (4)
端部の外径を縮径した一方のチューブと、端部の内径を拡径した他方のチューブとを有し、前記一方のチューブの端部を、前記他方のチューブの端部に挿入し、両チューブの接合部が溶着されて接合していることを特徴とする医療用チューブ。 In a medical tube formed by joining two or more tubes made of thermoplastic resin,
Having one tube with a reduced outer diameter of the end and the other tube with an enlarged inner diameter of the end, inserting the end of the one tube into the end of the other tube, A medical tube characterized in that the joint portion of both tubes is welded and joined.
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WO2011125263A1 (en) * | 2010-04-01 | 2011-10-13 | 精電舎電子工業株式会社 | Balloon catheter, balloon catheter manufacturing device, balloon catheter manufacturing method, catheter connection device, catheter connection method, and connected catheter |
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WO2013122083A1 (en) * | 2012-02-14 | 2013-08-22 | 精電舎電子工業株式会社 | Device for welding thermoplastic resin material, welding method, and pressing unit for welding device |
WO2018037475A1 (en) | 2016-08-23 | 2018-03-01 | 朝日インテック株式会社 | Joint structure and catheter having said joint structure |
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US10569048B2 (en) | 2016-08-23 | 2020-02-25 | Asahi Intecc Co., Ltd. | Junction structure and catheter having the junction structure |
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