JP6767721B2 - Wire manufacturing method - Google Patents

Description

The present invention relates to a method of manufacturing a wire have a long element.

Conventionally, long bodies such as tubes and wires have been used for operation systems and power transmission systems of various devices and devices. For example, in the medical field, long objects such as microcatheter and medical guide wire are known, and in the mechanical field, long objects such as guide wire for power transmission are known. The long body used for the operation system and power transmission system of such devices and equipment is excellent in performance such as operability and responsiveness, is easy to install, is hard to break during use, and is safe for a long period of time. Durability that can be used for is required.

Further, such a long body may be used in sliding contact with another member, and is required to have high slidability. In the case of the above-mentioned microcatheter, since it is inserted into the inside of another catheter and used, high slidability with the catheter on the side to be inserted is required. Further, the medical guide wire is used for the purpose of guiding the tip of the catheter to the vicinity of the target site, and high slidability is required between the outer surface of the medical guide wire and the inner surface of the catheter. Be done. Further, since the guide wire for power transmission is also installed and used inside the so-called outer tube, high slidability with the inner surface of the outer tube is required.

In the case of a long tubular object such as a microcatheter, the slidability can be ensured by forming a coating layer formed of a fluororesin or the like on the outer surface of the long tubular body. It is done. Similarly, with respect to a wire member such as a guide wire, the slidability thereof is improved by forming a coating layer formed of a fluororesin or the like on the outer surface.

However, since the conventional long product is manufactured by applying a heat-melted coating material to the entire outer periphery thereof to form a film, there is a problem that the manufacturing process is complicated. Further, depending on the type of coating material to be coated, there is a problem that it is easily peeled off from the outer circumference of the long body, and it is desired to develop a long body having higher durability and excellent slidability.

The present invention was made to solve such a problem, can be easily produced, and to provide a method of manufacturing a wire have a long body having an excellent durability and sliding property The purpose is.

The above object of the present invention is a method of manufacturing a wire have a long element, the wire winding step of winding a wire on the outer surface of the tube body is formed from a thermoplastic or thermosetting material, and By heating the tube body around which the wire rod is wound, the tube is provided with a fixing portion for fixing the wire rod to the outer surface of the tube body by heat fusion over the entire region around which the wire rod is wound. having an elongated body manufacturing step with a heating step to form the outer surface of the body, and a core insertion arrangement step of the core wire consisting of wires arranged and inserted into the lumen of the elongated body, to have a long element Achieved by the method of manufacturing the wire.

The method of manufacturing a wire for chromatic this elongated body, in a previous stage of the wire winding step, it is preferably configured to have a rod-like body insertion step of inserting a heat-resistant rod-like body into the lumen of the tube body ..

Further, it is preferable to have a rod-shaped body separation step for pulling out the heat-resistant rod-shaped body from the tube body in a subsequent stage of the heating step.

Further, wires have the said elongate body is preferably a medical guidewire.

According to the present invention, it can be easily produced and can provide a method for producing a wire have a long body having an excellent durability and sliding property.

It is an enlarged side view of the schematic structure main part in the long body which concerns on one Embodiment of this invention. It is an enlarged sectional view of the schematic structural part along the axial direction in the long body which concerns on one Embodiment of this invention. It is explanatory drawing explaining the manufacturing process of the long body shown in FIG. FIG. 5 is an enlarged side view of a schematic configuration main part showing a modified example of the long body shown in FIG.

Hereinafter, the long body according to the embodiment of the present invention will be described with reference to the accompanying drawings. Each figure is partially enlarged or reduced to facilitate understanding of the configuration. FIG. 1 is an enlarged side view of a schematic configuration main part in a long body 1 according to an embodiment of the present invention, and FIG. 2 is an enlargement of a schematic configuration main part along an axial direction (longitudinal direction of the long body 1). It is a sectional view. The long body 1 is a covering portion formed on the surface of a wire or the like, or as a tube used by sliding inside a tubular member in an operation system or a power transmission system of various devices or devices. Can be used as a member constituting the above. Examples of the tube include a microcatheter, a shaft portion of a medical manipulator inserted into a trocar, and the like, and examples of the member constituting the covering portion include a covering portion of a medical guide wire and an endoscope. Examples thereof include a covering portion in the insertion portion of the mirror, a covering portion of a wire cable for power transmission, and the like. It should be noted that the configuration according to the present invention can be applied to a body other than the long body illustrated as described above. As shown in FIGS. 1 and 2, the long body 1 according to the present invention includes a tube body 2, a wire rod 3 wound around the outer surface of the tube body 2, and a wire rod 3 as a tube body 2. It is provided with a fixing portion 4 for fixing to the outer surface of the above.

The tube body 2 is a self-supporting tubular member formed of a thermoplastic material. The tube body 2 may be formed as a structure having flexibility, or may be formed as a structure having no flexibility. The material for forming the tube body 2 is not particularly limited, but for example, it may be formed from a material having a physical property of hydrophobicity in addition to the physical property of thermoplasticity. Examples of the material having further hydrophobicity include a fluorine-based polymer. Examples of the fluoropolymer include tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA, melting point 300 to 310 ° C.), polytetrafluoroethylene (PTFE, melting point 330 ° C.), and tetrafluoroethylene-hexafluoropropylene. Polymer (FEP, melting point 250-280 ° C.), ethylene-tetrafluoroethylene copolymer (ETFE, melting point 260-270 ° C.), polyvinylidene fluoride (PVDF, melting point 160-180 ° C.), polychlorotrifluoroethylene (PCTFE) , Melting point 210 ° C.), tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer (EPE, melting point 290-300 ° C.), etc., and hydrophobicity formed from fluoropolymers such as copolymers containing these polymers. Sexual polymers can be mentioned. Further, in addition to the fluorine-based polymer material, the tube body 2 may be formed from a hydrophobic polymer material such as polyamide, polyester, polycarbonate, urethane, silicone, polyethylene or polypropylene. Further, as the material for forming the tube body 2, a material having a physical property of thermoplasticity and not having a physical property of hydrophobicity can also be used. Specific examples of such a material include polyether polymers such as polyethylene oxide, polypropylene oxide, polyether amide, polyether ester amide, or polyether ester, cellulose polymers such as cellulose ester, and vinyl acetate. Polyvinyl alcohol-based polymers such as copolymers and polyvinyl alcohol esters, acrylic polymers such as acrylic resins, ionomer resins, ethyl ethylene acrylate copolymers, modified products thereof, and copolymers with other compounds. Etc. can be mentioned.

The tube body 2 may be formed of the above-mentioned polymer material alone, or may be formed by combining different types of polymer materials, or may be formed inside for the purpose of reinforcing the tube body 2. Various forms of tube bodies such as those in which a coiled member formed of a metal material is embedded can be adopted. The coiled members arranged inside the tube body 2 include, for example, various types of steel wires such as stainless steel wires, nickel wires, piano wires, cobalt-based alloy wires, and alloy wires exhibiting pseudoelasticity (including superelastic alloys). It can be formed from a metal wire rod, a thin metal plate formed from a metal material such as stainless steel or nickel, or the like.

The wire rod 3 wound around the outer surface of the tube body 2 and arranged is a flexible linear member, and the fixing portion 4 formed on the outer surface of the tube body 2 with the tube body 2 is formed. Is fixed to the outer surface of the tube body 2. The fixing portion 4 is formed by thermal deformation of the outer surface of the tube body 2. In the configurations shown in FIGS. 1 and 2, the wire rod 3 is spirally wound around the outer surface of the tube body 2 and arranged. Further, as shown in the cross-sectional view of FIG. 2, the fixing portion 4 has a concave shape along the circumferential direction of the wire rod 3 arranged on the outer surface of the tube body 2 in a cross-sectional view along the longitudinal direction of the long body 1. Have. Since the wire rod 3 is spirally arranged on the outer surface of the tube body 2, the concave fixing portion 4 also spirally extends on the outer surface of the tube body 2 along the longitudinal direction of the elongated body. have.

The material for forming the wire rod 3 can be formed from various polymer materials, metal materials, and natural fiber materials. Examples of the polymer material include a fluorine-based polymer material having lubricity (easy slipperiness). Examples of such a fluoropolymer include tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA, melting point 300 to 310 ° C.), polytetrafluoroethylene (PTFE, melting point 330 ° C.), and tetrafluoroethylene-hexa. Fluoropropylene copolymer (FEP, melting point 250-280 ° C), ethylene-tetrafluoroethylene copolymer (ETFE, melting point 260-270 ° C), polyvinylidene fluoride (PVDF, melting point 160-180 ° C), polychlorotrifluoro From fluoropolymers such as ethylene (PCTFE, melting point 210 ° C.), tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer (EPE, melting point 290-300 ° C.), and copolymers containing these polymers. Examples thereof include the formed hydrophobic polymer. Of these, PFA, PTFE, FEP, ETFE, and PVDF are preferable because they have excellent sliding characteristics. Further, as the wire rod 3, a wire rod 3 formed of a hydrophobic polymer such as polyamide, polyester, polycarbonate, urethane, silicone, polyethylene or polypropylene can also be used.

Further, the wire rod 3 is easily slippery formed of a hydrophilic polymer material such as polyvinyl alcohol, polyvinylpyrrolidone, polyethylene oxide-based polymer substance, maleic anhydride-based polymer substance, acrylamide-based polymer substance, and water-soluble nylon. A sex wire 3 can also be used. Examples of the hydrophilic polymer material forming the wire rod 3 include cotton cellulose, rayon (visco-rayon, copper ammonia rayon, polynosic rayon, etc.), cellulose esters (cellulose acetate, cellulose acetate propionate, cellulose acetate, etc.). Cellulose-based polymer typified by (butyrate) may be used. Further, a hydrophilic wire 3 may be formed by forming a wire from a hydrophobic polymer material and subjecting the wire to a known hydrophilic treatment. For example, a wire rod is formed from a hydrophobic cellulose ester material, and the wire rod is subjected to a known hydrophilic treatment such as oxidizing a hydroxyl group of cellulose to a carboxyl group, and then the hydrophilic treatment is performed. The wire rod 3 may be used and arranged on the outer surface of the tube body 2. Alternatively, a wire rod is formed from a hydrophobic cellulose ester material, the wire rod is placed on the outer surface of the tube body 2, and then the wire rod is subjected to a hydrophilic treatment to spiral on the surface of the tube body 2. The hydrophilic wire rod 3 arranged in a shape may be formed. When the hydrophilization treatment is performed after winding the wire rod formed from the cellulose ester material around the tube body 2, the hydrophilization treatment may be performed before the heat treatment described later, or after the heat treatment. You may go. When the wire rod 3 is configured to have hydrophilicity, when the elongated body 1 is used in a water-wet environment, that is, a wet environment (wet environment), the hydrophilic wire rod 3 contains water and is high. It is possible to exhibit slidability.

The method for producing the wire rod 3 from the above-mentioned various materials is not particularly limited, and a conventionally known method such as a method for spinning a raw material by extrusion molding can be used. Further, the method of winding the wire rod 3 around the tube body 2 is not particularly limited, and examples thereof include a method of winding using a covering device used for manufacturing a covering yarn.

Further, as the wire rod 3, in addition to the wire rod 3 manufactured by a single polymer material, the wire rod 3 manufactured by combining different types of polymer materials, and the wire rod 3 manufactured by combining a polymer material and a metal material, A wire rod 3 or the like manufactured by combining a polymer material and a non-metal material can be used. The form of the wire rod 3 may be a single wire, or may be a stranded wire formed by twisting single wires of the same type. Further, it may be a stranded wire formed by twisting different types of single wires.

When a slippery wire rod 3 is formed by combining different types of polymer materials, a hydrophobic wire rod formed from a hydrophobic polymer material having slipperiness and a hydrophilic polymer material having slipperiness are used. A wire rod 3 formed by twisting a hydrophilic wire rod to be formed may be used. The number of each of the hydrophobic wire rod and the hydrophilic wire rod used for the twisted yarn is not particularly limited, and various numbers can be combined to form. When such a wire rod 3 is used, it is possible to obtain a long body 1 that maintains good slidability in either a dry environment (dry environment) or a wet environment (wet environment).

Further, as described above, when the hydrophobic wire and the hydrophilic wire are twisted to form the wire 3 and the wire 3 is wound around the outer surface of the tube 2, the hydrophobic wire is, for example, polyester-based. It is preferably composed of a polymer, a polyamide-based polymer, or the like. Here, as the polyester-based polymer, an aliphatic polyester-based polymer is more preferable. Examples of the aliphatic polyester polymer include polyethylene succinate, polybutylene succinate, polyhexamethylene succinate, polyethylene adipate, polyhexamethylene adipate, and polybutylene adipate obtained by polycondensation of glycol and aliphatic dicarboxylic acid. , Polyethylene oxalate, polybutylene oxalate, polyneopentyl oxalate, polyethylene sebacate, polybutylene sebacate, polyhexamethylene sebacate and the like. Examples of the aliphatic polyester polymer include poly (α-hydroxy acids) such as polyglycolic acid and polylactic acid, or copolymers thereof, poly (ε-caprolactone) and poly (β-propio). Poly (ω-hydroxyalkanoate) such as lactone), poly (3-hydroxybutyrate), poly (3-hydroxyvariate), poly (3-hydroxycaprolate), poly (3-hydroxyheptanoate) ), Poly (β-hydroxy alkanoate) such as poly (3-hydroxyoctanoate) and aliphatic polyesters such as poly (4-hydroxybutyrate). Further, as the above-mentioned polyamide-based polymer, an aliphatic polyamide-based polymer is more preferable. Examples of the aliphatic polyamide polymer include polyamide 12, polyamide 11, polyamide 6, and polyamide 66.

Further, when the wire rod 3 is formed from a metal material, various metal materials such as stainless steel, copper, nichrome, and aluminum can be exemplified as the metal material. Further, when the wire rod 3 is formed from natural fibers, fibers such as Manila hemp and sisal hemp can be exemplified as the natural fibers.

Further, a fixing portion 4 for fixing the wire rod 3 is formed on the outer surface of the tube body 2 between the tube body 2 and the wound wire rod 3. The fixing portion 4 is a portion (heat fusion portion) formed by heating and melting at least the outer surface of the tube body 2 and thermally deforming the outer surface, and as shown in FIG. 2, the tube body 2 It is formed so as to have a concave shape with respect to the outer surface of the. By providing such a fixing portion 4, the wire rod 3 is firmly fixed to the tube body 2.

As a method of forming the fixing portion 4, for example, the wire rod 3 is spirally wound around the outer surface of the tube body 2 and then heated near the melting point temperature of the tube body 2 to melt at least the outer surface of the tube body 2. A method of thermally deforming the outer surface can be mentioned. As a method of heat treatment, for example, a chamber type heat treatment apparatus can be used to apply heat from the outside of the wire rod 3 wound around the tube body 2. Further, as the wire 3, for example, when a metal wire made of a metal material that easily conducts electricity or a composite wire having a coating layer made of a polymer material formed around the conductive metal wire is used, the metal wire is used. By applying a voltage to both ends of the wire, the wire 3 can be heated, and the heat can melt the outer surface of the tube 2. Further, in the case where a coiled member made of a metal material that easily conducts electricity is embedded inside the tube body 2, a voltage is applied to both ends of the coiled member to energize and heat the tube body 2. It can also be done by doing.

Further, for example, when the wire rod 3 is composed of a conductive material (for example, a metal material having conductivity) and the tube body 2 is formed of a material having a lower magnetism than the wire rod 3, the tube body 2 is topped. The wire rod 3 arranged in the above is electromagnetically induced and heated, the outer surface of the tube body 2 is melted by the heat of the heated wire rod 3, and the outer surface is thermally deformed, and the wire rod 3 is fixed to the tube body 2. (Heat fusion portion) may be formed. The material having a lower magnetism than the wire 3 is a concept including a material having a weaker magnetism than the wire 3 and a material having no magnetism. In addition, electromagnetic induction heating is a type of heating method that is also used in electromagnetic cookers (IH cooking heaters), high-frequency welding, etc., and causes changes in the magnetic field (magnetic field density) by passing an alternating current through the coil. This is a heating method that utilizes the principle of generating an induced current (eddy current) in a conductive material placed in the magnetic field and generating heat of the conductive material itself by its resistance. By setting the frequency of the current flowing through the electromagnetic induction heating device (AC current flowing through the coil) high, the portion of the wire rod 3 that generates heat can be collected on the surface thereof, and conversely, the frequency of the current is set low. As a result, the inside of the wire rod 3 can also generate heat uniformly, so it is preferable to configure the wire rod 3 so that the frequency of the current flowing through the electromagnetic induction heating device can be appropriately changed.

If the coiled member for reinforcement is embedded inside to form the tube body 2 and the embedded coiled member is a conductive material (for example, a conductive metal material), the dielectric is described above. A heat-sealed portion can be formed by using a heating method.

Here, since at least the outer surface of the tube body 2 is melted to form the fixing portion 4 (heat fusion portion), the material for forming the wire rod 3 is a material having a higher melting point than the material for forming the tube body 2. Formed from. The melting point of the wire rod 3 is preferably 50 ° C. or higher, more preferably 100 ° C. or higher, higher than the melting point of the tube body 2. By forming the wire rod 3 and the tube body 2 from materials having different melting points in such a temperature range, the wire rod 3 wound around the tube body 2 is softened by the above-mentioned heat treatment, and the shape thereof is changed. It is preferable from the viewpoint of improving durability and slidability because it is possible to effectively prevent the change and maintain the molecular orientation that contributes to the physical properties of the wire rod 3.

Next, a method for manufacturing the long body 1 having the above configuration will be described with reference to explanatory views illustrating the manufacturing process of FIG. The method for manufacturing the long body 1 includes a wire rod winding step and a heating step. As described above, the wire rod winding step is a step of winding and arranging the wire rod 3 on the outer surface of the tube body 2 which is formed of a thermoplastic material and can stand on its own (schematic side view of FIG. 3A, FIG. See schematic cross-sectional view of FIG. 3 (b)). In addition, in FIG. 3A and the like, the state in which the wire rod 3 is spirally wound around the tube body 2 is shown.

In the heating step, the fixing portion 4 (fixing portion 4 () in which the wound wire 3 is fixed to the outer surface of the tube 2 by heating the tube 2 around which the wire 3 is wound to melt at least the outer surface of the tube 2. This is a step of forming the heat-sealed portion) (see the schematic cross-sectional view of FIG. 3C and the enlarged schematic cross-sectional view of the main part of FIG. 3D). As the heat treatment method, the above-mentioned heating method can be used. Specifically, this can be performed by applying heat from the outside of the wire rod 3 wound around the tube body 2 using a chamber type heat treatment apparatus. Further, in the case of a configuration in which a coil-shaped member made of a metal material that easily conducts electricity is embedded inside the tube body 2, a voltage may be applied to both ends of the coil-shaped member to energize and heat the member. It can be carried out. Further, for example, when the wire rod 3 is composed of a conductive material (for example, a metal material having conductivity) and the tube body 2 is formed of a material having a lower magnetism than the wire rod 3, the tube body 2 is topped. The wire rod 3 arranged in the above may be electromagnetically induced and heated, and the outer surface of the tube body 2 may be melted by the heat of the heated wire rod 3. By going through this heating step, a fixing portion 4 (heat fusion portion) for fixing the wire rod 3 is formed on the outer surface of the tube body 2 between the tube body 2 and the wound wire rod 3. Here, since the outer surface of the tube body 2 is melted by being heated, it is deformed along the surface shape of the wire rod 3 in contact with the outer surface, and the fixed portion 4 formed is the wire rod 3 It has a concave shape along the circumferential direction of (see FIG. 3D). Since the concave fixing portion 4 is in contact with the surface of the wire rod 3 as a surface, strong fixing property can be exhibited.

The long body 1 according to the present embodiment can be manufactured by a simple method in which the wire rod 3 is spirally wound and arranged on the outer surface of the self-supporting tube body 2 and heat-treated. It is possible to shorten the time required for the process and reduce the cost. Further, since the long body 1 of the present embodiment is formed by winding a wire rod 3 having a predetermined thickness around the surface of a tube body 2 having a predetermined outer diameter, the external dimensions of the long body 1 are maintained uniformly. It becomes easy to do.

Further, for example, when the long body 1 according to the present embodiment is used by being inserted into the conduit (for example, when the long body 1 is configured as a microcatheter and is used by being inserted through the conduit (catheter)). ), Since the long body 1 includes a wire rod 3 arranged on the surface of the tube body 2, the wire rod 3 forms a convex portion protruding from the surface of the tube body 2, and the convex portion forms a conduit. Since it comes into contact with the inner surface of the pipe, the contact area between the elongated body 1 and the inner surface of the conduit can be significantly reduced. As a result, the slidability of the long body 1 with respect to the conduit is improved, and smooth advancing / retreating movement in the conduit becomes possible. Further, when the wire rod 3 is formed of a material having slipperiness, the sliding resistance between the inner surface of the conduit and the long body 1 when the long body 1 moves back and forth in the conduit can be further reduced. , It is possible to obtain even higher slidability.

Further, the long body 1 according to the present embodiment is configured so that the outer surface of the tube body 2 is melted and the wire rod 3 is integrally heat-sealed to the tube body 2, so that the wire rod 3 is strengthened. It can be fixed to and the durability of the long body 1 can be improved. Further, while the outer surface of the tube body 2 is melted, the wire rod 3 can be fixed to the tube body 2 without melting the wire rod 3, so that the wire rod 3 used includes various polymers as described above. A wire rod 3 formed of various materials such as a material, a metal material, and a natural fiber material can be used, and the effect of widening the selection range of the wire rod 3 can be obtained. For example, when the wire rod 3 is formed from a hydrophilic polymer material and the wire rod 3 is melted and heat-sealed to the surface of the tube body 2 without melting the surface of the tube body 2, the type of the hydrophilic polymer material Some polymers do not have sufficient thermoplasticity for thermal fusion based on hydrogen bonds between molecules, and it is difficult to thermally fuse them to the tube body 2. However, when the method of the present invention is adopted. The wire rod 3 made of a hydrophilic polymer material that is difficult to be heat-sealed can be firmly fixed to the outer surface of the tube body 2. Further, even when a wire rod 3 (for example, a metal wire rod 3) having a high melting point and having difficulty in melting the wire rod 3 itself and being heat-sealed to the tube body 2 is selected, it is melted in the present invention. Since it is on the tube body 2 side, it is possible to reliably fix such a wire rod 3 to the surface of the tube body 2 without any problem.

Further, as described above, the fixing portion 4 for fixing the tube body 2 and the wire rod 3 has a concave shape having an inner surface along the circumferential direction of the wire rod 3 as shown in FIG. 3 (d). Since the concave fixing portion 4 is in contact with the surface of the wire rod 3 as a surface, strong fixing property can be exhibited. Further, when viewed from the wire rod 3 side, a part of the surface of the wire rod 3 facing the outer surface of the tube body 2 is in contact with the inner surface of the concave fixing portion 4 and is not exposed. With such a configuration, for example, as described above, the wire rod 3 is formed from the hydrophobic cellulose ester material, and the wire rod 3 is wound around the outer surface of the tube body 2 and arranged, and then heat-treated. Then, the long body 1 in which the wire 3 is fixed to the tube 2 by the fixing portion 4 is subjected to a hydrophilic treatment of the wire 3 that oxidizes the hydroxyl group of cellulose to a carboxyl group, and is arranged on the surface of the tube 2. When the wire rod 3 is configured to have hydrophilicity, a part of the surface of the wire rod 3 that is not exposed by contacting the inner surface of the concave fixing portion 4 is a portion that does not come into contact with the reaction solution for hydrophilic treatment or the like. Can be left as. In this way, since a part of the wire rod 3 facing the fixing portion 4 can be formed as a portion that is not hydrolyzed when the hydrophilization treatment is performed, the stickiness in the fixing portion 4 is firmly maintained, and the wire rod after the hydrophilization treatment is performed. It is possible to effectively prevent the 3 from separating from the tube body 2.

Although the long body 1 according to the present invention has been described above, the specific configuration is not limited to the above embodiment. In the above embodiment, the tube body 2 is configured as a self-supporting tubular member formed of a thermoplastic material, but is configured as, for example, a self-supporting tubular member formed of a thermosetting material. You may. Even with such a configuration, the wire rod 3 is spirally wound around the tube body 2, and then the thermosetting tube body 2 is heat-treated to cure and deform the tube body 2, and the wire rod 3 is tubed. It can be firmly fixed to the outer surface of the body 2, and the above-mentioned effects such as facilitation of manufacturing, high durability and slidability can be obtained. Here, various thermosetting polymer materials can be used as the thermosetting material constituting the tube body 2, for example, a phenol-based polymer, an epoxy-based polymer resin, a melamine-based polymer resin, and the like. Examples thereof include urea-based polymers, unsaturated polyester-based polymer resins, alkyd-based polymers, polyurethanes, and thermosetting polyimides. The tube body 2 formed of a thermosetting material, which has not been heat-treated, exhibits softness while maintaining its shape. Therefore, when the wire rod 3 is wound around its outer surface, it is used. The wire rod 3 can bite into the surface of the tube body 2. By performing the heat treatment in such a state, the shape of the fixing portion 4 can be easily formed as a concave shape along the circumferential direction of the wire rod 3.

Further, in the present embodiment, as shown in FIGS. 1 and 2, the adjacent wire rods 3 are configured so as not to come into contact with each other and form a gap in the direction along the longitudinal direction of the elongated body 1. The distance between the wire rods 3 adjacent to each other along the longitudinal direction of the long body 1 can be arbitrarily set without being limited to such a configuration. For example, it may be configured to provide a predetermined interval in a direction along the longitudinal direction of the elongated body 1. Further, the distance between the adjacent wire rods 3 may be set wide in a part and narrow in the other part. When a predetermined distance is formed between the wire rods 3 adjacent to each other in the direction along the longitudinal direction of the elongated body 1, for example, the wire rod 3 pitch of the wire rod 3 in the direction along the longitudinal direction of the elongated body 1 is the wire rod 3 pitch. It is preferable that the diameter is in the range of 1 to 10 times the maximum diameter of 3. As shown in the cross-sectional view of FIG. 2, the wire rod 3 pitch of the wire rod 3 is a concept representing the distance between the centers of the wire rods 3 adjacent to each other in the direction along the longitudinal direction of the long body 1.

Further, in the above embodiment, the cross-sectional shape of the wire rod 3 wound around the outer surface of the tube body 2 is not particularly limited, and the cross-sectional shape may be circular or non-circular. Examples of the non-circular cross-sectional shape include an elliptical shape, a polygonal cross-sectional shape, a fan-shaped cross-sectional shape, and the like.

Further, in the above embodiment, a single wire rod 3 is spirally wound around the surface of the tube body 2 to form a long body 1, but the structure is not particularly limited to such a structure, and the tube body 2 is not particularly limited. A long body 1 may be formed by spirally winding a plurality of wire rods 3 on the surface of the above. When a plurality of wire rods 3 are wound around the tube body 2, each wire rod 3 is arranged on the surface of the tube body 2 so that at least a part thereof is in contact with the surface of the tube body 2. Each wound wire 3 may be a wire 3 formed of the same material, or may be a different type of wire 3. Further, when a plurality of wire rods 3 are spirally wound around the tube body 2, the winding directions of the respective wire rods 3 may be the same, or the winding directions of the respective wire rods 3 may be opposite to each other. You may turn it. Further, as shown in the enlarged side view of the schematic configuration main part of FIG. 4, the wire rod 3 is wound around the outer surface of the tube body 2 so as to form the mesh-like structure 5 to form the long body 1. You may. Such a mesh-like structure 5 may be formed in any way, for example, it may be formed by a braid manufacturing method, or the wire rod 3 may be formed by knitting in the same manner as in forming a knitted fabric. When the wire rod 3 is wound around the outer surface of the tube body 2 so as to form the mesh-like structure 5 in this way, a large number of wire nodule portions 6 between the wire rods 3 are formed, so that a part of the wire rod 3 is tentatively formed. Even if the wire is broken and peeled from the surface of the long body 1, the progress of the peeling can be stopped at the line nodule portion 6.

Further, in the description of the above-described embodiment, the case where it is used as a long tubular object is mainly described, but as described above, the elongated body 1 according to the present invention constitutes a covering portion such as a wire. It can also be used as a member. When used as an abdominal portion of a wire or the like, for example, a core wire such as a wire may be inserted into the lumen of the elongated body 1 and arranged. Further, for example, after inserting a long core wire into the tube body 2, the wire rod 3 is spirally wound around the outer surface of the tube body 2, and then heat-treated to melt or melt the outer surface of the tube body 2. By curing, it becomes possible to obtain a wire or the like (medical guide wire, power transmission guide wire, etc.) whose outer surface is covered with the elongated body 1 according to the present invention.

Further, in the method for manufacturing a long member according to the present invention described above, a wire rod winding step for winding the wire rod 3 around the outer surface of a tube body 2 which is formed of a thermoplastic or thermosetting material and can stand on its own is provided. However, in the pre-stage of this wire rod winding step, a rod-shaped body insertion step for inserting the heat-resistant rod-shaped body may be provided in the lumen of the tube body 2. In such a case, a rod-shaped body separating step for pulling out the heat-resistant rod-shaped body from the tube body 2 is provided in a subsequent stage of the heating step of forming the fixing portion 4 on the outer surface of the tube body 2. As the heat-resistant rod-shaped body, for example, a rod-shaped glass member or ceramic member, a rod-shaped metal member having a fluororesin coating on the surface, a fluororesin rod-shaped body, or a cylindrical member having high slipperiness is preferably used. Can be done. By providing the rod-shaped body insertion step in this way, it is possible to prevent the inner diameter of the tube body 2 from shrinking during the heat treatment in the heating step.

1 Long body 2 Tube body 3 Wire rod 4 Fixed part 5 Mesh structure 6 Nodule part

Claims (4)

A wire manufacturing method for have a long element,
The wire rod is wound by heating the wire rod winding step in which the wire rod is wound around the outer surface of the tube body formed of a thermoplastic or thermosetting material, and the tube body around which the wire rod is wound. A long body manufacturing step having a heating step of forming a fixing portion on the outer surface of the tube body to fix the wire rod to the outer surface of the tube body by heat fusion over the entire rotated region .
And a core insert placement step of placing a core wire made of wire inserted into the lumen of the elongated body, the manufacturing method of the wire to have a long element. In a previous stage of the wire winding step, the production of wire that have a long body according to claim 1, characterized in that it comprises a rod-like body insertion step of inserting a heat-resistant rod-like body into the lumen of the tube body Method. In later stages of the heating step, the wire manufacturing method for have a long body according to claim 2, characterized in that it comprises a rod-shaped body separating step of withdrawing the heat-resistant rod-shaped body from the tube body. Wire have a said elongate member is a wire manufacturing method for have a long body according to any one of claims 1 to 3, which is a medical guidewire.

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