WO2017038154A1 - 操作用中空撚り線 - Google Patents
操作用中空撚り線 Download PDFInfo
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- WO2017038154A1 WO2017038154A1 PCT/JP2016/062748 JP2016062748W WO2017038154A1 WO 2017038154 A1 WO2017038154 A1 WO 2017038154A1 JP 2016062748 W JP2016062748 W JP 2016062748W WO 2017038154 A1 WO2017038154 A1 WO 2017038154A1
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- wire
- stranded wire
- hollow stranded
- hollow
- strands
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320016—Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes
- A61B17/32002—Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes with continuously rotating, oscillating or reciprocating cutting instruments
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00112—Connection or coupling means
- A61B1/00121—Connectors, fasteners and adapters, e.g. on the endoscope handle
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0673—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0693—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a strand configuration
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/12—Ropes or cables with a hollow core
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C1/00—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing
- F16C1/02—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing for conveying rotary movements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C1/00—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing
- F16C1/10—Means for transmitting linear movement in a flexible sheathing, e.g. "Bowden-mechanisms"
- F16C1/20—Construction of flexible members moved to and fro in the sheathing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09108—Methods for making a guide wire
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09133—Guide wires having specific material compositions or coatings; Materials with specific mechanical behaviours, e.g. stiffness, strength to transmit torque
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09191—Guide wires made of twisted wires
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0606—Reinforcing cords for rubber or plastic articles
- D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
- D07B1/0633—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration having a multiple-layer configuration
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0606—Reinforcing cords for rubber or plastic articles
- D07B1/0646—Reinforcing cords for rubber or plastic articles comprising longitudinally preformed wires
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2001—Wires or filaments
- D07B2201/2007—Wires or filaments characterised by their longitudinal shape
- D07B2201/2008—Wires or filaments characterised by their longitudinal shape wavy or undulated
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2021—Strands characterised by their longitudinal shape
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2022—Strands coreless
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2038—Strands characterised by the number of wires or filaments
- D07B2201/2039—Strands characterised by the number of wires or filaments three to eight wires or filaments respectively forming a single layer
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2038—Strands characterised by the number of wires or filaments
- D07B2201/204—Strands characterised by the number of wires or filaments nine or more wires or filaments respectively forming multiple layers
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2047—Cores
- D07B2201/2052—Cores characterised by their structure
- D07B2201/2063—Cores characterised by their structure being hollow
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/30—Inorganic materials
- D07B2205/3021—Metals
- D07B2205/3025—Steel
- D07B2205/3028—Stainless steel
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/30—Inorganic materials
- D07B2205/3021—Metals
- D07B2205/3025—Steel
- D07B2205/3032—Austenite
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2207/00—Rope or cable making machines
- D07B2207/40—Machine components
- D07B2207/404—Heat treating devices; Corresponding methods
- D07B2207/4063—Heat treating devices; Corresponding methods for stress relief
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2207/00—Rope or cable making machines
- D07B2207/40—Machine components
- D07B2207/4072—Means for mechanically reducing serpentining or mechanically killing of rope
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2084—Mechanical controls, e.g. door lashes
Definitions
- the present invention relates to a hollow stranded wire for operation that can also be used, for example, in medical instruments.
- a medical instrument also referred to as a medical device
- an operation wire rope or the like is used as one component.
- an endoscopic treatment instrument disclosed in Japanese Patent Laid-Open No. 8-126648 is known.
- the operation wire rope transmits the operation force to the treatment portion.
- This operation wire rope can transmit the pushing force, pulling force, and rotational force (torque) from the operation unit to the treatment unit. By the transmitted force, medical treatment can be performed on the treatment target site in the body.
- the wire rope for operation is required to have excellent torque transmission (rotation followability) as well as push / pull transmission according to its purpose.
- torque transmission property of the operation wire rope is insufficient, the operation of the operation unit is not reproduced in the treatment unit. Further, particularly in the field of medical equipment, the flexibility of the operating wire rope is required as the diameter of the medical equipment is reduced.
- JP-A-6-63142 discloses a coiled pipe used as a diagnostic treatment catheter.
- This pipe is formed by winding a metal wire in a coil shape.
- adjacent coil portions are in pressure contact with each other by an initial restoring force due to the coil formation.
- this catheter is also required to have flexibility, pushability and torque transmission included in the transmission of push-pull force.
- the present invention has been made in view of the present situation, and an object of the present invention is to provide a hollow stranded wire for operation excellent in torque transmission.
- the molding rate of the side strand or side strand that is the outermost layer is more than 100% and 110% or less.
- the flatness which is an aspect ratio obtained by dividing the major axis by the minor axis, is 1.01 or more and 1.10 or less in the spiral shape exhibited by the side strands or side strands that are molded.
- the molding rate is 101% or more and 105% or less.
- the flatness is 1.01 or more and 1.05 or less.
- the hollow stranded wire for operation according to the present invention is excellent in torque transmission.
- FIG. 1 is a perspective view showing a part of an embodiment of a hollow stranded wire for operation according to the present invention.
- FIG. 2 is a cross-sectional view showing another embodiment of the hollow stranded wire for operation according to the present invention.
- FIG. 3 is a cross-sectional view showing an example of a wire rope in the process of manufacturing the hollow stranded wire for operation shown in FIG.
- FIG. 4 is a perspective view for explaining the outline of the torque transmission property evaluation test method for the hollow stranded wire for operation.
- FIG. 5 is a graph in which the rotation angle on the proximal end side of the hollow stranded wire for operation is associated with the rotation angle on the distal end side at the same point.
- FIG. 1 and FIG. 2 illustrate different embodiments of the hollow stranded wire for operation according to the present invention (hereinafter also simply referred to as a hollow stranded wire).
- Each of the hollow stranded wires 2 and 10 has a configuration in which a plurality of strands are twisted together.
- the present invention is not limited to the configuration according to the embodiment shown in FIGS. 1 and 2.
- the hollow stranded wire 2 shown in FIG. 1 has a layer 6 composed of six strands 4, that is, a stranded structure composed of six layers.
- the hollow stranded wire 2 has a tunnel-like internal space 8.
- the 2 has two layers of a lower layer (inner layer) 12 and an upper layer (outer layer) 14.
- the lower layer 12 has a single-layer six-strand structure composed of six strands 16.
- the upper layer 14 has a single-layer 12-strand structure composed of 12 strands 18.
- the hollow stranded wire 10 has a tunnel-like internal space 20.
- side strands 18 having different diameters are used in order to make the cross-sectional shape close to a circle. However, it is not limited to this configuration, and all the side wires 18 may have the same diameter.
- the strands 4 and 18 constituting the outermost layer are also called side strands. If the outermost layer is not a strand but a strand, this is also called a side strand.
- the hollow strand wires 2 and 10 are suitable, but are not limited thereto.
- the hollow stranded wire can be manufactured by twisting the wire rope in the same manner as when twisting the wire rope by using a wire rope twisting machine.
- the first is to twist the preformed side strands, side strands and the like along the circumference without inserting a core wire or a core strand.
- a hollow stranded wire is formed.
- the hollow stranded wire is subjected to post heat treatment.
- a core wire or a core strand is inserted, and the preformed side strands, side strands and the like are twisted along the circumference.
- a wire rope is formed by this twisting process.
- the wire rope is subjected to post heat treatment. After this wire rope is cut to a predetermined length, a hollow stranded wire is completed by pulling out the core wire or the core strand.
- each strand which comprises a hollow strand wire is adjusted so that the required tensile strength may be obtained in a wire drawing process.
- preforming is performed on the side strands or side strands by a preformer so as to give the required molding rate and flatness. In particular, it is preformed so that the cross section of the spiral of the side strands or side strands is flat. And these strands or strands are twisted by the said strand wire machine. In this twisting step, in the case of a twisted wire that does not contain a core wire or a core strand (FIGS. 1 and 2), this becomes a hollow twisted wire.
- this post-heat treatment step of the hollow stranded wire continuous processing is performed instead of batch processing. Specifically, tension is applied to each of the entrances and exits of the heat treatment furnace with respect to the to-be-treated hollow stranded wire passing through the heat treatment furnace. By doing so, straightness of the hollow stranded wire is improved. Further, the molding rate and flatness of the side strands or side strands are determined. In this way, a hollow stranded wire is completed.
- a wire rope is completed.
- a 1 + 6 layer-twisted wire rope 22 composed of one core wire 24 and the six outer strands 4 is formed. Therefore, as described above, the wire rope 22 is cut into a predetermined length, and the core wire 24 is pulled out to finish, for example, a hollow stranded wire 2 as shown in FIG.
- the hollow stranded wires 2 and 10 of these embodiments can be used for medical instruments.
- the hollow stranded wire attached to the medical instrument for operation is, for example, a base end part connected to a hand operating part of the medical instrument and a tip part connected to a treatment part. Torque and push / pull force applied to the proximal end portion are transmitted to the distal end portion, and the treatment portion causes a treatment operation.
- the strands of the hollow stranded wires 2 and 10 are made of austenitic stainless steel such as SUS304 or SUS316, nickel-titanium alloy, or the like. Of course, it is not limited to these materials.
- the tensile strength of the material of these strands is preferably 2000 MPa or more, more preferably 2500 MPa or more, and particularly preferably 2800 MPa or more.
- the mold rate of the side strands 4 and 18 or the side strands that are the outermost layers of the hollow stranded wires 2 and 10 is more than 100% and 110% or less.
- This mold rate is a value obtained by dividing the spiral strand diameter (waviness diameter) of the side strand or side strand when the hollow strand is loosened by the measured outer diameter of the hollow strand. Is expressed as a percentage.
- the side strand may enter the internal space in the twisting process.
- the molding rate exceeds 110%, a so-called open structure may be formed in which voids are generated between the strands, and the desired hollow stranded wire diameter may not be obtained. From this viewpoint, it is preferable that the molding rate is 101% or more and 105% or less.
- the spiral of the side strands or side strands may be elliptical or oval rather than perfect circles. In other words, the spiral is flat.
- the major axis of the major axis and the minor axis is used as the waviness diameter for determining the above-described molding rate.
- the hollow stranded wires 2 and 10 are formed so that the molding rate is 110% or less even when the long diameter is used as the waviness diameter. Moreover, even if it is a case where a short diameter is used as a waviness diameter, the hollow stranded wires 2 and 10 are formed so that a shaping rate may exceed 100%.
- the flatness (also referred to as flatness) of the side strands 4 and 18 or the side strands which are the outermost layers of the hollow stranded wires 2 and 10 is 1.01 or more and 1.10 or less.
- the flatness refers to the aspect ratio of the above-described flat spiral of the loosened side strands or side strands obtained by dividing the major axis by the minor axis.
- An example of a method for measuring the diameter of the spiral will be described below. On the projector, the loosened side strand or side strand is rotated about its central axis. In the process, the spiral diameter is measured at a plurality of arbitrary angular positions (for example, five locations).
- the plurality of angular positions are preferably equiangular intervals.
- the maximum value is determined as the major axis.
- the spiral diameter measured from the measurement direction of the major axis in the direction rotated by 90 ° around the central axis of the side strand or side strand is determined as the minor axis.
- a plurality of spirals are continuously formed along the axial direction of the loosened side strands or side strands. Therefore, the average value of a plurality of measured values (for example, arbitrary 10 locations) is adopted as each diameter in the direction intersecting 90 °.
- the flatness is 1.01 or more, the frictional force generated between the side strands or between the side strands is further increased, so that the energy loss when transmitting the rotation of the hollow stranded wire is further reduced. Is obtained.
- the flatness is less than 1.01, this useful action cannot be expected.
- the flatness exceeds 1.10, a so-called open structure is obtained, and it may be difficult to stably manufacture the hollow stranded wire. From this viewpoint, the flatness is preferably 1.01 or more and 1.05 or less.
- the twist angle of the side strands 4 and 18 of the hollow strands 2 and 10 or the side strand is preferably 15 ° or more.
- the hollow stranded wire having a twist angle of 15 ° or more becomes more flexible and is easy to bend.
- a twist angle means the angle which a strand or a strand makes with the central axis of a hollow strand or a strand.
- the side strand or the side strand refers to an angle formed with the central axis of the hollow stranded wire.
- Example 1-9 A hollow stranded wire for operation of Example 1-9 having the configuration shown in FIG. 1 was obtained.
- These hollow stranded wires are wire hollow stranded wires for medical devices.
- the material of all the strands is SUS304 austenitic stainless steel.
- the outer diameter (cord diameter) of the hollow stranded wire is 0.7 mm.
- These hollow stranded wires were produced by first producing a wire rope and extracting the core wire from the wire rope.
- the outer diameter of the core wire of the wire rope in the manufacturing stage of the hollow stranded wire is 0.25 mm.
- the outer diameter of the side strand is 0.23 mm.
- the tensile strength of both the side wire and the core wire is 2800 MPa.
- Each of these twisted hollow strands is obtained by extracting the core wire from a 1 + 6 layer twisted rope.
- the twist pitch of the hollow stranded wire is 5.5 mm.
- the heat treatment temperature of the hollow stranded wire of Example 1-9 is 500 ° C.
- Table 1 and Table 2 show the molding rate and flatness of the side strands of the hollow stranded wire of Example 1-9.
- Comparative Example 1 A hollow stranded wire for operation of Comparative Example 1 was obtained in the same manner as in Example 1 except that the molding rate and flatness were as shown in Table 2 and the cord diameter was significantly larger than 0.7 mm. As shown in Table 2, since the molding rate of the hollow stranded wire of Comparative Example 1 was 115%, a so-called open structure was formed in which many voids were generated between the strands. For this reason, the cord diameter greatly exceeded 0.7 mm. The hollow stranded wire of Comparative Example 1 did not exhibit as an operation hollow stranded wire for medical devices, and was determined to be impossible to use as an operation hollow stranded wire for medical devices. .
- Comparative Example 2 is a hollow stranded wire for operation according to the prior art.
- the hollow stranded wire for operation of Comparative Example 2 is the same as Example 1 except that the molding rate and flatness are as shown in Table 2.
- the side strands of the hollow stranded wire of Comparative Example 2 are not flattened.
- Torque transmission is based on the rotation angle on the proximal side and the distal side (corresponding to the treatment part of the medical instrument) when the proximal end of each hollow stranded wire (corresponding to the operation part of the medical instrument) is rotated. It is evaluated by the difference from the rotation angle.
- the torque transmission evaluation test was carried out as follows.
- a double spiral having a diameter of 200 mm is formed for each hollow stranded wire of Example 1-9 and Comparative Examples 1 and 2.
- a thin pipe 26 having a double spiral shape with a diameter of 200 mm and both ends being linear is used for the formation of the double spiral.
- the test hollow stranded wire 2 is inserted into the small diameter pipe 26.
- a rotational force around the central axis is applied to the proximal end side 2A of the test hollow stranded wire 2. While the rotational force is applied, the rotation angle of the proximal end side 2A and the rotation angle of the distal end side 2B of the hollow stranded wire 2 are simultaneously measured.
- FIG. 5 is a graph in which the rotation angle of the proximal end 2A of the hollow stranded wire and the rotation angle of the distal end 2B at the same point are associated with each other.
- FIG. 5 is a graph showing the relationship between the input rotation angle and the output rotation angle with respect to the hollow hollow wire for operation.
- the unit of angle is degree (°).
- a broken line extending at an angle of 45 ° with respect to the horizontal axis and the vertical axis starting from 0 ° indicates the base end side 2A in the entire measurement angle range (input rotation angle range from 0 ° to about 720 °). This is a straight line indicating that the difference between the rotation angle and the rotation angle of the distal end side 2B is zero.
- the difference between the rotation angle of the proximal end 2A and the rotation angle of the distal end 2B, which is the object of evaluation of the test hollow stranded wire, is expressed as the difference in the vertical axis direction between the 45 ° inclined straight line and the measured value curve in the figure. Is done.
- This difference in rotation angle corresponds to the rotation angle on the base end side. In this figure, the difference in the rotation angle is shown larger than the actual difference for easy understanding. In the range of 0 ° to 720 ° of the input rotation angle, the maximum angle difference among the measured rotation angle differences is set as an evaluation target.
- the maximum angle difference of each hollow stranded wire of Example 1-9 and Comparative Examples 1 and 2 is shown in Table 1 and Table 2 by the index when the maximum angle difference of Comparative Example 2 is 100.
- the hollow stranded wire for operation according to the present invention is suitable as a hollow stranded wire for operation of medical instruments.
Abstract
Description
図1に示された構成を備えた実施例1-9の各操作用中空撚り線を得た。これらの中空撚り線は、医療機器用のワイヤ中空撚り線である。全ての素線の材質が、SUS304オーステナイト系ステンレス鋼である。中空撚り線の外径(コード径)は0.7mmである。これらの中空撚り線は、まずワイヤーロープを製造し、このワイヤーロープから芯線を抜き取ることにより製造された。中空撚り線の製造段階におけるワイヤーロープの芯線の外径は0.25mmである。側素線の外径は0.23mmである。側素線及び芯線ともに、その引っ張り強度は2800MPaである。これらの中空撚り線の撚り構成は、いずれも1+6の層撚りのロープから芯線を抜き取ったものである。中空撚り線の撚りピッチはいずれも5.5mmである。実施例1-9の中空撚り線の熱処理温度は、いずれも500°Cである。実施例1-9の中空撚り線の側素線の型付け率及び扁平度は、表1及び表2に示されるとおりである。
型付け率及び扁平度が表2に示されるとおりであり、コード径が0.7mmを大幅に超えている他は実施例1と同様にして、比較例1の操作用中空撚り線を得た。表2に示されるとおり、比較例1の中空撚り線の型付け率を115%としたため、素線間に多くの空隙が生じる、いわゆるオープン構造となった。このため、コード径が0.7mmを大幅に超えた。かかる比較例1の中空撚り線は、医療機器用の操作用中空撚り線としての呈を成しておらず、医療機器用の操作用中空撚り線としての使用は不可能であると判断された。
比較例2は、従来技術に係る操作用中空撚り線である。この比較例2の操作用中空撚り線は、型付け率及び扁平度が表2に示されるとおりである他は、実施例1と同等である。この比較例2の中空撚り線の側素線については、扁平形状にはされていない。
トルク伝達性は、各中空撚り線の基端側(医療用器具の操作部に相当)を回転させたときの、基端側の回転角と先端側(医療用器具の処置部に相当)の回転角との差によって評価される。実施例及び比較例の各中空撚り線に対し、以下のごとくトルク伝達性の評価試験が実施された。
4、18・・・側素線
6・・・層
8、20・・・内部空間
12・・・下層(内層)
14・・・上層(外層)
16・・・素線
22・・・ワイヤーロープ
24・・・芯線
26・・・細径パイプ
Claims (4)
- 最外層である側素線又は側ストランドの型付け率が、100%を超え110%以下である操作用中空撚り線。
- 上記型付けされている側素線又は側ストランドが呈しているスパイラル形状の、長径を短径で除した縦横比である扁平度が、1.01以上1.10以下である請求項1に記載の操作用中空撚り線。
- 上記型付け率が、101%以上105%以下である請求項1又は2に記載の操作用中空撚り線。
- 上記扁平度が、1.01以上1.05以下である請求項2に記載の操作用中空撚り線。
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US15/580,209 US10426505B2 (en) | 2015-08-31 | 2016-04-22 | Hollow stranded wire line for manipulation |
EP16841186.6A EP3293306A4 (en) | 2015-08-31 | 2016-04-22 | TWISTED WIRE HOLLOW OPERATION |
CN201680029896.3A CN107614787A (zh) | 2015-08-31 | 2016-04-22 | 操作用中空绞线 |
KR1020177032357A KR20170136587A (ko) | 2015-08-31 | 2016-04-22 | 조작용 중공 연선 |
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JP2015170511A JP6611237B2 (ja) | 2015-08-31 | 2015-08-31 | 操作用中空撚り線 |
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EP (1) | EP3293306A4 (ja) |
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KR (1) | KR20170136587A (ja) |
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JP5870227B1 (ja) * | 2015-06-26 | 2016-02-24 | トクセン工業株式会社 | 操作用ロープ |
JP5870226B1 (ja) * | 2015-06-26 | 2016-02-24 | トクセン工業株式会社 | 操作用ロープ |
JP6423374B2 (ja) * | 2016-01-07 | 2018-11-14 | トクセン工業株式会社 | 操作用中空撚り線 |
JP6340447B1 (ja) * | 2017-03-14 | 2018-06-06 | 株式会社三和テスコ | ベルトコンベア水洗浄装置に併設されるスラッジ脱水装置 |
EP3636162B1 (en) * | 2018-10-09 | 2023-07-19 | BibbInstruments AB | Biopsy instrument and kit of parts |
FR3099192A1 (fr) * | 2019-07-25 | 2021-01-29 | Compagnie Generale Des Etablissements Michelin | Procédé de fractionnement et de réassemblage d’un assemblage à deux couches |
JP7347985B2 (ja) * | 2019-08-05 | 2023-09-20 | トクセン工業株式会社 | 電磁波遮蔽体のための中空撚り線 |
CN113430848A (zh) * | 2021-05-11 | 2021-09-24 | 盐城荣星制绳有限公司 | 一种空心钢丝绳的生产工艺 |
CN114214856B (zh) * | 2021-11-01 | 2023-04-14 | 江阴法尔胜住电新材料有限公司 | 一种复合钢绞线制作方法 |
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EP3293306A1 (en) | 2018-03-14 |
KR20170136587A (ko) | 2017-12-11 |
US10426505B2 (en) | 2019-10-01 |
JP2017048471A (ja) | 2017-03-09 |
JP6611237B2 (ja) | 2019-11-27 |
CN107614787A (zh) | 2018-01-19 |
US20180161053A1 (en) | 2018-06-14 |
EP3293306A4 (en) | 2019-02-13 |
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