WO2019244521A1 - Endoscopic flexible tube production method, endoscopic flexible tube, and endoscope - Google Patents

Endoscopic flexible tube production method, endoscopic flexible tube, and endoscope Download PDF

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Publication number
WO2019244521A1
WO2019244521A1 PCT/JP2019/019341 JP2019019341W WO2019244521A1 WO 2019244521 A1 WO2019244521 A1 WO 2019244521A1 JP 2019019341 W JP2019019341 W JP 2019019341W WO 2019244521 A1 WO2019244521 A1 WO 2019244521A1
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WO
WIPO (PCT)
Prior art keywords
melt adhesive
hot melt
flexible tube
endoscope
base material
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Application number
PCT/JP2019/019341
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French (fr)
Japanese (ja)
Inventor
由久 四條
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Hoya株式会社
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Publication date
Application filed by Hoya株式会社 filed Critical Hoya株式会社
Priority to JP2020525359A priority Critical patent/JP7022210B2/en
Publication of WO2019244521A1 publication Critical patent/WO2019244521A1/en

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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
    • A61B1/005—Flexible endoscopes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes

Definitions

  • the present invention relates to a method for manufacturing a flexible tube for an endoscope, a flexible tube for an endoscope, and an endoscope.
  • a flexible tube for an endoscope in which a base tube formed by coating a metal mesh tube on a spiral tube in which a steel plate is spirally wound is used as an exterior member of an insertion portion of the endoscope.
  • a solvent coating apparatus for a flexible tube for an endoscope which coats a silane coupling material on the surface of a substrate. After the silane coupling material is applied to the base material by spraying, the skin resin is extruded around the base material, whereby the base material and the skin resin can be bonded with sufficient strength (Patent Document 1).
  • the spray chamber for spraying the silane coupling material requires a decompression unit, an exhaust unit, a cooling unit, and the like. Further, the base material to which the silane coupling material has been applied must be sufficiently dried before extruding the shell resin to remove the solvent in which the silane coupling material is dissolved. Therefore, the size of the manufacturing apparatus is increased, and the manufacturing takes time.
  • One object of the present invention is to provide a method for manufacturing a flexible tube for an endoscope, which can manufacture a flexible tube for an endoscope with a small manufacturing apparatus.
  • a hot melt adhesive is melted, and the hot melt adhesive is extruded on the outer periphery of a cylindrical base material.
  • FIG. 4 is a sectional view taken along line IV-IV of FIG. 3. It is the A section enlarged view of FIG.
  • FIG. 7 is a schematic diagram of a crosshead according to a second embodiment. It is a longitudinal cross-sectional view of the flexible tube for endoscopes of Embodiment 3. It is a cross-sectional enlarged view of the flexible tube for endoscopes of Embodiment 4. It is a cross-sectional enlarged view of the flexible tube for endoscopes of Embodiment 4. It is a cross-sectional enlarged view of the flexible tube for endoscopes of Embodiment 4. It is a cross-sectional enlarged view of the flexible tube for endoscopes of Embodiment 4.
  • FIG. 1 is an external view of the endoscope 10.
  • the endoscope 10 of the present embodiment is a flexible endoscope for the upper digestive tract or the lower digestive tract.
  • the endoscope 10 has an insertion section 20, an operation section 40, a universal cord 59, and a connector section 50.
  • the operation unit 40 has a bending knob 41 and a channel entrance 42.
  • a forceps plug 43 having an insertion port for inserting a treatment tool or the like is fixed to the channel inlet 42.
  • the insertion section 20 is long and one end is connected to the operation section 40 via the break prevention section 26.
  • the insertion section 20 has a flexible section 21, a bending section 22, and a distal end section 23 in this order from the operation section 40 side.
  • the flexible part 21 is flexible.
  • the surface of the flexible portion 21 is a tube-shaped flexible tube 30 for an endoscope (see FIG. 3).
  • the bending portion 22 bends according to the operation of the bending knob 41.
  • the longitudinal direction of the insertion section 20 will be referred to as the insertion direction.
  • the side closer to the operation unit 40 along the insertion direction is referred to as the operation unit side, and the side farther from the operation unit 40 is referred to as the distal end side.
  • the universal cord 59 is long, and has a first end connected to the operation unit 40 and a second end connected to the connector unit 50.
  • the universal cord 59 is flexible.
  • the connector unit 50 is connected to a video processor, a light source device, a display device, an air / water supply device, and the like (not shown).
  • FIG. 2 is an external view of an end face of the distal end portion 23.
  • An observation window 51, two illumination windows 52, an air supply nozzle 53, a water supply nozzle 54, a channel outlet 55, and the like are provided on an end surface of the distal end portion 23.
  • the end face of the tip 23 is substantially circular.
  • the observation window 51 is provided above the center of the end face in FIG.
  • Illumination windows 52 are provided on the left and right of the observation window 51.
  • an air supply nozzle 53 and a water supply nozzle 54 are provided with their emission ports facing the observation window 51.
  • a channel outlet 55 is provided at the lower left of the observation window 51.
  • a fiber bundle, a cable bundle, an air supply tube, a water supply tube, and the like are inserted into the connector section 50, the universal cord 59, the operation section 40, and the insertion section 20.
  • the illumination light emitted from the light source device is emitted from the illumination window 52 via the fiber bundle.
  • An area illuminated by the illumination light is photographed by an image sensor (not shown) through the observation window 51.
  • a video signal is transmitted from the image sensor to the video processor via the cable bundle.
  • the air supplied from the air supply / water supply device is discharged from the air supply nozzle 53 toward the observation window 51 via the air supply tube.
  • the water supplied from the air / water supply device is discharged from the water supply nozzle 54 toward the observation window 51 via the water supply tube.
  • the air supply nozzle 53 and the water supply nozzle 54 are used for cleaning the observation window 51 during an endoscope inspection.
  • the channel inlet 42 and the channel outlet 55 are connected by a tubular channel that passes through the inside of the flexible portion 21 and the curved portion 22.
  • a treatment tool (not shown) from the channel inlet 42, the distal end of the treatment tool can be protruded from the channel outlet 55 to perform a procedure such as resection of a colon polyp.
  • FIG. 3 is a longitudinal sectional view of the flexible tube 30 for an endoscope. As described above, the flexible tube 30 for an endoscope is an exterior member of the flexible portion 21. FIG. 3 shows a cross section of the flexible tube 30 for an endoscope cut along the insertion direction. FIG. 4 is a sectional view taken along line IV-IV in FIG. FIG. 5 is an enlarged view of a portion A in FIG.
  • the flexible tube 30 for an endoscope has a configuration in which the outer periphery of a base material 35 is sequentially covered with a hot melt adhesive layer 38, an outer skin 33, and a top coat 34.
  • the substrate 35 has a spiral tube 31 and a mesh tube 32 that covers the outer periphery of the spiral tube 31.
  • the spiral tube 31 has a configuration in which a band-shaped metal is spirally wound.
  • FIG. 3 shows a spiral tube 31 in which one band-shaped metal is spirally wound, but a spiral tube 31 in which two or more band-shaped metals are spirally wound may be used.
  • the helical tube 31 protects the internal components such as the fiber bundle, cable bundle, and various tubes inserted therein from being crushed when the flexible portion 21 is bent.
  • the mesh tube 32 is formed by braiding a plurality of strands 321 (see FIG. 5) into a tubular shape.
  • the strand 321 is, for example, a thin wire such as a stainless steel wire or a copper alloy wire.
  • the material of the strand 321 may be non-metallic.
  • the strand 321 may have a configuration in which the surface of a thin metal wire is coated with a resin.
  • the braided tube 32 may be formed by combining and braiding materials or wires 321 having different thicknesses.
  • the outer cover 33 is a resin layer that covers the entire outer periphery of the mesh tube 32.
  • the outer cover resin which is a material of the outer cover 33 is, for example, a polyolefin such as an ethylene-vinyl acetate copolymer, a fluororesin such as polytetrafluoroethylene, an ethylene-tetrafluoroethylene copolymer, a polyester elastomer, a polyolefin elastomer, It is a fluorine-based elastomer, a polyurethane-based elastomer, a polyamide-based elastomer, a silicone rubber, a fluorine-containing rubber, or the like.
  • the outer cover 33 may be a laminate of a plurality of resin layers.
  • the outer shell 33 may be formed by mixing a plurality of outer shell resin materials.
  • the top coat 34 is, for example, a urethane-based resin or a fluorine resin.
  • the top coat 34 protects the outer skin 33 from a chemical solution or the like used for cleaning and disinfecting the endoscope 10.
  • the hot-melt adhesive layer 38 is a layer formed by a hot-melt adhesive that is applied in a state of being melted by heating, and solidifies and adheres when cooled.
  • the hot melt adhesive layer 38 bonds the mesh tube 32 and the outer cover 33. As shown in FIGS. 3 and 4, the hot melt adhesive layer 38 covers the entire outer periphery of the mesh tube 32.
  • the hot melt adhesive forming the hot melt adhesive layer 38 slightly penetrates into the gaps between the wires 321 forming the mesh tube 32.
  • the bonding area between the hot-melt adhesive layer 38 and the braided tube 32 is large, and an anchor effect due to the unevenness of the bonding surface works. Therefore, the hot melt adhesive layer 38 and the braided tube 32 are firmly bonded.
  • the main component of the hot melt adhesive layer 38 is desirably made of the same resin material as the outer cover 33.
  • a polyurethane elastomer is used for the material of the outer cover 33
  • a polyurethane-based hot melt adhesive is used for the hot melt adhesive layer 38.
  • a polyester elastomer is used as the material of the outer cover 33
  • a polyester hot melt adhesive is used for the hot melt adhesive layer 38. Resin materials of the same system are firmly connected.
  • the hot melt adhesive layer 38 firmly adheres the outer skin 33 over the entire outer periphery of the mesh tube 32.
  • the thickness t1 of the hot melt adhesive layer 38 is about 50 micrometers
  • the thickness t2 of the outer cover 33 is about 200 micrometers. Desirably.
  • the softening point of the hot melt adhesive used for the hot melt adhesive layer 38 is desirably 80 degrees Celsius or more, and more desirably 100 degrees Celsius or more.
  • the test method for the softening point of the hot melt adhesive is defined by JIS (Japan Industrial Standard) K6863-1994 "Test Method for Softening Point of Hot Melt Adhesive".
  • FIG. 6 is a schematic view of the outer cover device 60.
  • the outer cover device 60 is a device that covers the outer periphery of the base material 35 with the hot melt adhesive layer 38 and the outer cover 33.
  • the outer cover device 60 includes a molding unit 69 and a curing unit 67.
  • the molding unit 69 includes an extruder 70 and a crosshead 81.
  • the extruder 70 includes a first extruder 701 and a second extruder 702, each connected to the crosshead 81.
  • the first extruder 701 extrudes the hot melt adhesive layer 38.
  • the second extruder 702 extrudes the outer skin 33.
  • the base material 35 is manufactured for each endoscope 10.
  • a plurality of base materials 35 are connected in a line by a connection member 36 to form a base material connection body 37.
  • the connected base material 37 is supplied in a state of being wound around the first drum 681.
  • the base material linking body 37 passes through the inside of the crosshead 81 and is connected to the second drum 682 via the curing unit 67. As the first drum 681 and the second drum 682 rotate, the base material link 37 passes through the crosshead 81 at a predetermined speed. In the cross head 81, the hot melt adhesive layer 38 and the outer cover 33 are extruded on the surface of the base material linked body 37.
  • the curing unit 67 cures the extruded outer skin 33.
  • the curing unit 67 is a cooler.
  • an ultraviolet curing resin is used for the outer cover 33
  • the curing section 67 is an ultraviolet lamp.
  • the curing unit 67 is a heater. Note that the hot melt adhesive layer 38 is cured when the temperature falls below the softening point.
  • FIG. 7 is a schematic diagram of the first extruder 701.
  • the first extruder 701 includes a raw material container 74.
  • the raw material container 74 and the above-described crosshead 81 are connected by a substantially cylindrical tubular portion 77.
  • a screw 75 is disposed coaxially with the tubular portion 77 inside the tubular portion 77, and a heating channel 76 is formed between the screw 75 and the inner surface of the tubular portion 77.
  • the heating unit 71 is disposed outside the cylindrical unit 77.
  • the heating unit 71 is divided into a first heating unit 711, a second heating unit 712, and a third heating unit 713 from the side near the raw material container 74.
  • the first heating unit 711, the second heating unit 712, and the third heating unit 713 include a heater 72 and a blower 73, respectively.
  • the heater 72 and the blower 73 are controlled by a control device (not shown), and the temperature of the heating channel 76 is set to a predetermined temperature.
  • the heating unit 71 may be divided into four or more.
  • Powder or granular raw material is charged into the raw material container 74.
  • the raw material in the raw material container 74 enters the heating channel 76 and is sent into the crosshead 81 by the rotation of the screw 75.
  • the rotation speed of the screw 75 that is, the speed at which the raw material is supplied to the crosshead 81, is controlled by a control device (not shown).
  • the configuration of the second extruder 702 is the same as that of the first extruder 701 shown in FIG.
  • the second extruder 702 extrudes the skin resin.
  • the heating unit 71 of the second extruder 702 may be divided into two or four or more, and may not be divided.
  • FIG. 8 is a schematic view of the crosshead 81.
  • the crosshead 81 has a first die 61, a second die 62, and a third die 63.
  • the first mold 61 has a substantially cylindrical shape having a first base material hole 611 along the central axis.
  • the second mold 62 has a substantially stepped cylindrical shape including a large diameter portion 628 and a small diameter portion 629.
  • the inner surface of the large diameter portion 628 covers the outer surface of the first mold 61.
  • the inner surface of the small diameter portion 629 is arranged coaxially with the first base material hole 611, and forms a second base material hole 622 slightly thicker than the first base material hole 611.
  • the third mold 63 has a substantially cylindrical shape that covers the outer surface of the small diameter portion 629.
  • One end of the inner surface of the third die 63 forms a third base material hole 633 that is slightly thicker than the second base material hole 622.
  • the first base material hole 611, the second base material hole 622, and the third base material hole 633 are continuously arranged on the same axis, and the base material connected body 37 is inserted therein.
  • a first molding channel 651 is formed between the outer surface of the first die 61 and the inner surface of the second die 62.
  • the first forming channel 651 is connected to the first extruder 701.
  • a second molding channel 652 is formed between the outer surface of the second die 62 and the inner surface of the third die 63.
  • the second molding channel 652 is connected to the second extruder 702.
  • the operation of the skin covering device 60 will be described with reference to FIGS.
  • the base material link 37 passes through the crosshead 81 at a predetermined speed.
  • the hot melt adhesive in the raw material container 74 of the first extruder 701 is supplied to the heating channel 76.
  • the screw 75 By the rotation of the screw 75, the hot melt adhesive is extruded inside the heating channel 76 toward the crosshead 81.
  • the temperature in the heating channel 76 is adjusted to a predetermined value by the heater 72 and the blower 73.
  • Table 1 shows that when a hot melt adhesive having a softening point of about 120 degrees is used, the hot melt adhesive in the heating channel 76 at the center of each of the first heating unit 711 to the third heating unit 713 is used. An example of a temperature is shown. The unit is Celsius.
  • the process in which the hot melt adhesive passes through the heating channel 76 will be described.
  • the powdery or granular hot melt adhesive is preheated in the first heating unit 711, and changes into a fluid near the center of the second heating unit 712.
  • the hot melt adhesive is further heated in the third heating unit 713 to become a low viscosity fluid.
  • the hot melt adhesive passes through the first molding flow path 651 and is extruded on the surface of the base member linked body 37. Since the hot-melt adhesive has a low viscosity, as described with reference to FIG. 11, the hot-melt adhesive slightly penetrates into the gap between the strands 321 constituting the mesh tube 32. Note that the thickness of the hot melt adhesive and the amount of penetration into the mesh tube 32 are adjusted by the speed of the base member connected body 37 and the rotation speed of the screw 75.
  • the hot melt adhesive that has reached the gap between the spiral tubes 31 easily reaches the inner surface of the spiral tube 31. Therefore, it is further desirable that the speed of the base material connector 37 and the rotation speed of the screw 75 are adjusted so that the hot melt adhesive does not penetrate into the inner surface of the mesh tube 32.
  • the outer cover resin is extruded from the second extruder 702 to the surface of the hot melt adhesive through the second forming flow path 652 to form the outer cover 33.
  • the outer skin 33 is hardened by the hardening section 67.
  • Hot melt adhesives cure when the temperature falls below the softening point.
  • the hot melt adhesive may be cured before the outer cover 33 is extruded, or may be cured in the cured portion 67.
  • the outer skin 33 may be composed of two or more layers. For example, by providing a plurality of second extrusion molding machines 702 and a plurality of second molding channels 652, the outer cover 33 can be configured in a multilayer.
  • the linked base material 37 that has passed through the hardening section 67 is wound around a second drum 682 as shown in FIG. Note that instead of winding around the second drum 682, the connecting member 36 may be removed and separated one by one. The top coat 34 may be added between the curing section 67 and the second drum 682.
  • the present embodiment it is possible to provide a manufacturing method or the like that can manufacture the endoscope flexible tube 30 with a small-sized manufacturing apparatus.
  • the outer cover 33 and the mesh tube 32 are firmly adhered to each other, so that the endoscope flexible tube 30 with high durability can be provided.
  • the endoscope flexible tube 30 for preventing deterioration of the hot-melt adhesive is prevented. Can be provided.
  • the material of the hot melt adhesive layer 38 may be a so-called reactive hot melt adhesive such as a moisture-curable urethane hot melt adhesive.
  • the reactive hot melt adhesive does not re-melt at the same temperature as at the time of bonding because the curing reaction proceeds after bonding the reticulated tube 32 and the outer cover 33 in a molten state. Therefore, the endoscope flexible tube 30 and the endoscope 10 having high heat resistance can be provided.
  • the present embodiment relates to a method of manufacturing a flexible tube 30 for an endoscope in which a hot melt adhesive and an outer cover 33 are simultaneously extruded.
  • the description of the parts common to the first embodiment is omitted.
  • FIG. 9 is a schematic diagram of the crosshead 81 according to the second embodiment.
  • the crosshead 81 has a first die 61 and a second die 62.
  • the first mold 61 has a substantially cylindrical shape having a first base material hole 611 along the central axis.
  • the second mold 62 has a substantially cylindrical shape that covers the outer surface of the first mold 61.
  • One end of the inner surface of the second die 62 forms a second base material hole 622 that is slightly thicker than the first base material hole 611.
  • the first base material hole 611 and the second base material hole 622 are continuously arranged on the same axis, and the base material connected body 37 is inserted therein.
  • a first molding channel 651 is formed between the outer surface of the first die 61 and the inner surface of the second die 62.
  • the first forming channel 651 is connected to the first extruder 701.
  • a substantially cylindrical second molding flow path 652 is formed in the second mold 62.
  • the second molding channel 652 is connected to the second extruder 702.
  • the first molding flow path 651 and the second molding flow path 652 join and are connected to the second base material hole 622.
  • the hot melt adhesive extruded from the first extruder 701 and the resin of the outer skin 33 extruded from the second extruder 702 are formed into two layers and extruded on the surface of the base member link body 37. Molded.
  • the hot melt adhesive and the outer skin 33 come into contact with each other in a molten state, and are hardened after flowing together, so that they are firmly joined at the interface. Therefore, it is possible to manufacture the flexible tube 30 for an endoscope in which peeling between the two hardly occurs.
  • the present embodiment relates to an endoscope flexible tube 30 whose hardness changes in the insertion direction.
  • the description of the parts common to the first embodiment is omitted.
  • FIG. 10 is a longitudinal sectional view of the flexible tube 30 for an endoscope according to the third embodiment.
  • the outer skin 33 has a configuration in which the outside of the first outer skin 331 is covered by a second outer skin 332.
  • the hot melt adhesive layer 38 gradually increases in thickness from left to right in FIG.
  • the first outer skin 331 is gradually thinned from the left side to the right side in FIG.
  • the sum of the thicknesses of the hot melt adhesive layer 38 and the first outer skin 331 and the thickness of the second outer skin 332 are uniform.
  • the change in the thickness of the hot melt adhesive layer 38 and the thickness of the first shell 331 are exaggerated.
  • the thickness of the hot melt adhesive layer 38 and the first outer cover 331 may be changed over the entire length of the flexible tube 30 for an endoscope, or may be changed in a part of the flexible tube 30 for an endoscope.
  • the hardness of the hot melt adhesive layer 38 is different from that of the first shell 331. According to the present embodiment, it is possible to provide an endoscope flexible tube 30 having a uniform thickness and a hardness that changes in the insertion direction. In addition, since the thickness of the second outer skin 332 is uniform, it is possible to provide the flexible tube 30 for an endoscope having a uniform appearance as a whole.
  • the present embodiment relates to a flexible tube 30 for an endoscope in which a penetration amount of a hot melt adhesive into a mesh tube 32 changes in an insertion direction.
  • the description of the parts common to the first embodiment is omitted.
  • FIGS. 11 to 13 are enlarged cross-sectional views of the flexible tube 30 for an endoscope according to the fourth embodiment. 11 to 13 show enlarged cross-sectional views cut at different positions in the insertion direction, similarly to FIG.
  • the flexible tube 30 for an endoscope has sections shown in FIGS. 5, 11, 12, and 13 in order from an end on the distal end side to an end on the operation section side.
  • the depth of penetration of the hot melt adhesive into the mesh tube 32 is increased in the order of FIG. 5, FIG. 11 and FIG. In FIG. 13, the hot-melt adhesive has penetrated the entire reticulated tube 32 and has also penetrated a part of the spiral tube 31.
  • the hardness of the endoscope flexible tube 30 increases as the penetration depth increases. Thereby, it is possible to provide the endoscope flexible tube 30 having a uniform thickness and having a gradual increase in hardness from the distal end side to the operation unit side.

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Abstract

The present invention provides an endoscopic flexible tube production method or the like with which it is possible to produce an endoscopic flexible tube by using a small-scale production device. This method for producing an endoscopic flexible tube (30) involves melting a hot-melt adhesive, extruding and molding the hot-melt adhesive around the outer periphery of a cylindrical base material (35), and extruding and molding an outer skin resin on the outer periphery of the extrusion-molded hot-melt adhesive. The endoscopic flexible tube (30) is thus provided with a cylindrical base material ((35), a hot-melt adhesive that covers the outer periphery of the base material, and an outer-skin resin that cover the outer periphery of the hot-melt adhesive.

Description

内視鏡用可撓管の製造方法、内視鏡用可撓管および内視鏡Method of manufacturing flexible tube for endoscope, flexible tube for endoscope, and endoscope
　本発明は、内視鏡用可撓管の製造方法、内視鏡用可撓管および内視鏡に関する。 The present invention relates to a method for manufacturing a flexible tube for an endoscope, a flexible tube for an endoscope, and an endoscope.
　鋼板を螺旋状に巻いた螺旋管に、金属製の網状管を被覆して形成した基材を外皮樹脂で被覆した内視鏡用可撓管が、内視鏡の挿入部の外装部材に使用されている。基材の表面にシランカップリング材を塗布する内視鏡用可撓管用溶剤塗布装置が提案されている。基材にシランカップリング材をスプレーにより塗布した後に、基材の外周に外皮樹脂を押出成形することにより、基材と外皮樹脂とを十分な強度で接着できる（特許文献１）。 A flexible tube for an endoscope in which a base tube formed by coating a metal mesh tube on a spiral tube in which a steel plate is spirally wound is used as an exterior member of an insertion portion of the endoscope. Have been. There has been proposed a solvent coating apparatus for a flexible tube for an endoscope, which coats a silane coupling material on the surface of a substrate. After the silane coupling material is applied to the base material by spraying, the skin resin is extruded around the base material, whereby the base material and the skin resin can be bonded with sufficient strength (Patent Document 1).
特開２００６－１０９９９７号公報JP 2006-109997 A
　しかしながら、特許文献１に開示された装置においては、シランカップリング材をスプレーする噴霧室には減圧手段、排気手段および冷却手段等が必要である。さらに、シランカップリング材が塗布された基材は、外皮樹脂を押出成形する前に十分に乾燥させて、シランカップリング材を溶かした溶媒を取り除く必要がある。そのため、製造装置が大型化するとともに、製造に時間が掛かる。 However, in the apparatus disclosed in Patent Document 1, the spray chamber for spraying the silane coupling material requires a decompression unit, an exhaust unit, a cooling unit, and the like. Further, the base material to which the silane coupling material has been applied must be sufficiently dried before extruding the shell resin to remove the solvent in which the silane coupling material is dissolved. Therefore, the size of the manufacturing apparatus is increased, and the manufacturing takes time.
　一つの側面では、小型の製造装置で内視鏡用可撓管を製造可能な、内視鏡用可撓管の製造方法等を提供することを目的とする。 One object of the present invention is to provide a method for manufacturing a flexible tube for an endoscope, which can manufacture a flexible tube for an endoscope with a small manufacturing apparatus.
　内視鏡用可撓管の製造方法は、ホットメルト接着剤を溶融し、筒状の基材の外周に前記ホットメルト接着剤を押出成形する。 は In the method of manufacturing a flexible tube for an endoscope, a hot melt adhesive is melted, and the hot melt adhesive is extruded on the outer periphery of a cylindrical base material.
　一つの側面では、小型の製造装置で内視鏡用可撓管を製造可能な、製造方法等を提供できる。 According to one aspect, it is possible to provide a manufacturing method or the like capable of manufacturing a flexible tube for an endoscope with a small manufacturing apparatus.
内視鏡の外観図である。It is an external view of an endoscope. 先端部の端面の外観図である。It is an external view of the end surface of a front-end | tip part. 内視鏡用可撓管の縦断面図である。It is a longitudinal section of a flexible tube for endoscopes. 図３のＩＶ－ＩＶ線による断面図である。FIG. 4 is a sectional view taken along line IV-IV of FIG. 3. 図４のＡ部拡大図である。It is the A section enlarged view of FIG. 外皮被覆装置の模式図である。It is a schematic diagram of a skin covering device. 第１押出成形機の模式図である。It is a schematic diagram of a first extruder. クロスヘッドの模式図である。It is a schematic diagram of a crosshead. 実施の形態２のクロスヘッドの模式図である。FIG. 7 is a schematic diagram of a crosshead according to a second embodiment. 実施の形態３の内視鏡用可撓管の縦断面図である。It is a longitudinal cross-sectional view of the flexible tube for endoscopes of Embodiment 3. 実施の形態４の内視鏡用可撓管の横断面拡大図である。It is a cross-sectional enlarged view of the flexible tube for endoscopes of Embodiment 4. 実施の形態４の内視鏡用可撓管の横断面拡大図である。It is a cross-sectional enlarged view of the flexible tube for endoscopes of Embodiment 4. 実施の形態４の内視鏡用可撓管の横断面拡大図である。It is a cross-sectional enlarged view of the flexible tube for endoscopes of Embodiment 4.
［実施の形態１］
　図１は、内視鏡１０の外観図である。本実施の形態の内視鏡１０は、上部消化管または下部消化管向けの軟性鏡である。内視鏡１０は、挿入部２０、操作部４０、ユニバーサルコード５９およびコネクタ部５０を有する。操作部４０は、湾曲ノブ４１およびチャンネル入口４２を有する。チャンネル入口４２には、処置具等を挿入する挿入口を有する鉗子栓４３が固定されている。 [Embodiment 1]
FIG. 1 is an external view of the endoscope 10. The endoscope 10 of the present embodiment is a flexible endoscope for the upper digestive tract or the lower digestive tract. The endoscope 10 has an insertion section 20, an operation section 40, a universal cord 59, and a connector section 50. The operation unit 40 has a bending knob 41 and a channel entrance 42. A forceps plug 43 having an insertion port for inserting a treatment tool or the like is fixed to the channel inlet 42.
　挿入部２０は長尺であり、一端が折れ止め部２６を介して操作部４０に接続されている。挿入部２０は、操作部４０側から順に軟性部２１、湾曲部２２および先端部２３を有する。軟性部２１は、軟性である。軟性部２１の表面は、チューブ状の内視鏡用可撓管３０（図３参照）である。湾曲部２２は、湾曲ノブ４１の操作に応じて湾曲する。 The insertion section 20 is long and one end is connected to the operation section 40 via the break prevention section 26. The insertion section 20 has a flexible section 21, a bending section 22, and a distal end section 23 in this order from the operation section 40 side. The flexible part 21 is flexible. The surface of the flexible portion 21 is a tube-shaped flexible tube 30 for an endoscope (see FIG. 3). The bending portion 22 bends according to the operation of the bending knob 41.
　以後の説明では、挿入部２０の長手方向を挿入方向と記載する。同様に、挿入方向に沿って操作部４０に近い側を操作部側、操作部４０から遠い側を先端側と記載する。 In the following description, the longitudinal direction of the insertion section 20 will be referred to as the insertion direction. Similarly, the side closer to the operation unit 40 along the insertion direction is referred to as the operation unit side, and the side farther from the operation unit 40 is referred to as the distal end side.
　ユニバーサルコード５９は長尺であり、第一端が操作部４０に、第二端がコネクタ部５０にそれぞれ接続されている。ユニバーサルコード５９は、軟性である。コネクタ部５０は、図示しないビデオプロセッサ、光源装置、表示装置および送気送水装置等に接続される。 The universal cord 59 is long, and has a first end connected to the operation unit 40 and a second end connected to the connector unit 50. The universal cord 59 is flexible. The connector unit 50 is connected to a video processor, a light source device, a display device, an air / water supply device, and the like (not shown).
　図２は、先端部２３の端面の外観図である。先端部２３の端面には、観察窓５１、２個の照明窓５２、送気ノズル５３、送水ノズル５４およびチャンネル出口５５等が設けられている。 FIG. 2 is an external view of an end face of the distal end portion 23. An observation window 51, two illumination windows 52, an air supply nozzle 53, a water supply nozzle 54, a channel outlet 55, and the like are provided on an end surface of the distal end portion 23.
　先端部２３の端面は、略円形である。観察窓５１は、図２において端面の中心よりも上側に設けられている。観察窓５１の左右に照明窓５２が設けられている。観察窓５１の右下に、送気ノズル５３および送水ノズル５４が、それぞれの出射口を観察窓５１に向けて設けられている。観察窓５１の左下に、チャンネル出口５５が設けられている。 端 The end face of the tip 23 is substantially circular. The observation window 51 is provided above the center of the end face in FIG. Illumination windows 52 are provided on the left and right of the observation window 51. At the lower right of the observation window 51, an air supply nozzle 53 and a water supply nozzle 54 are provided with their emission ports facing the observation window 51. At the lower left of the observation window 51, a channel outlet 55 is provided.
　図１および図２を使用して、内視鏡１０の構成の説明を続ける。コネクタ部５０、ユニバーサルコード５９、操作部４０および挿入部２０の内部に、ファイバーバンドル、ケーブル束、送気チューブおよび送水チューブ等が挿通されている。光源装置から出射した照明光は、ファイバーバンドルを介して、照明窓５２から照射する。照明光により照らされた範囲を、観察窓５１を介して図示しない撮像素子で撮影する。撮像素子からケーブル束を介してビデオプロセッサに映像信号が伝送される。 説明 The description of the configuration of the endoscope 10 will be continued with reference to FIGS. A fiber bundle, a cable bundle, an air supply tube, a water supply tube, and the like are inserted into the connector section 50, the universal cord 59, the operation section 40, and the insertion section 20. The illumination light emitted from the light source device is emitted from the illumination window 52 via the fiber bundle. An area illuminated by the illumination light is photographed by an image sensor (not shown) through the observation window 51. A video signal is transmitted from the image sensor to the video processor via the cable bundle.
　送気送水装置から供給された空気は、送気チューブを介して送気ノズル５３から観察窓５１に向けて放出される。同様に、送気送水装置から供給された水は、送水チューブを介して送水ノズル５４から観察窓５１に向けて放出される。送気ノズル５３および送水ノズル５４は、内視鏡検査中の観察窓５１の清掃等に使用される。 空 気 The air supplied from the air supply / water supply device is discharged from the air supply nozzle 53 toward the observation window 51 via the air supply tube. Similarly, the water supplied from the air / water supply device is discharged from the water supply nozzle 54 toward the observation window 51 via the water supply tube. The air supply nozzle 53 and the water supply nozzle 54 are used for cleaning the observation window 51 during an endoscope inspection.
　チャンネル入口４２とチャンネル出口５５との間は、軟性部２１および湾曲部２２の内部を通るチューブ状のチャンネルにより接続されている。チャンネル入口４２から図示しない処置具を挿入することにより、チャンネル出口５５から処置具の先端を突出させて、大腸ポリープの切除等の手技を行なうことができる。 The channel inlet 42 and the channel outlet 55 are connected by a tubular channel that passes through the inside of the flexible portion 21 and the curved portion 22. By inserting a treatment tool (not shown) from the channel inlet 42, the distal end of the treatment tool can be protruded from the channel outlet 55 to perform a procedure such as resection of a colon polyp.
　図３は、内視鏡用可撓管３０の縦断面図である。前述のとおり、内視鏡用可撓管３０は、軟性部２１の外装部材である。図３は内視鏡用可撓管３０を挿入方向に沿って切断した断面を示す。図４は、図３のＩＶ－ＩＶ線による断面図である。図５は、図４のＡ部拡大図である。 FIG. 3 is a longitudinal sectional view of the flexible tube 30 for an endoscope. As described above, the flexible tube 30 for an endoscope is an exterior member of the flexible portion 21. FIG. 3 shows a cross section of the flexible tube 30 for an endoscope cut along the insertion direction. FIG. 4 is a sectional view taken along line IV-IV in FIG. FIG. 5 is an enlarged view of a portion A in FIG.
　内視鏡用可撓管３０は、基材３５の外周を、ホットメルト接着剤層３８、外皮３３およびトップコート３４で順次覆った構成である。基材３５は、螺旋管３１と螺旋管３１の外周を覆う網状管３２とを有する。螺旋管３１は、帯状の金属を螺旋状に巻いた構成である。図３においては、１本の帯状の金属を螺旋状に巻いた螺旋管３１を示すが、２本以上の帯状の金属を螺旋状に巻いた螺旋管３１を使用しても良い。螺旋管３１は、軟性部２１を屈曲した場合に、内部に挿通されたファイバーバンドル、ケーブル束および各種チューブ等の内蔵物が潰されないように保護する。 The flexible tube 30 for an endoscope has a configuration in which the outer periphery of a base material 35 is sequentially covered with a hot melt adhesive layer 38, an outer skin 33, and a top coat 34. The substrate 35 has a spiral tube 31 and a mesh tube 32 that covers the outer periphery of the spiral tube 31. The spiral tube 31 has a configuration in which a band-shaped metal is spirally wound. FIG. 3 shows a spiral tube 31 in which one band-shaped metal is spirally wound, but a spiral tube 31 in which two or more band-shaped metals are spirally wound may be used. The helical tube 31 protects the internal components such as the fiber bundle, cable bundle, and various tubes inserted therein from being crushed when the flexible portion 21 is bent.
　網状管３２は、複数の素線３２１（図５参照）を筒状に編組して形成されている。素線３２１は、たとえば、ステンレス鋼線または銅合金線等の細線である。素線３２１の材料は、非金属であっても良い。素線３２１は、金属の細線の表面に樹脂をコーティングした構成であっても良い。網状管３２は、素材または太さの異なる素線３２１を組み合わせて編組して形成されても良い。 The mesh tube 32 is formed by braiding a plurality of strands 321 (see FIG. 5) into a tubular shape. The strand 321 is, for example, a thin wire such as a stainless steel wire or a copper alloy wire. The material of the strand 321 may be non-metallic. The strand 321 may have a configuration in which the surface of a thin metal wire is coated with a resin. The braided tube 32 may be formed by combining and braiding materials or wires 321 having different thicknesses.
　外皮３３は、網状管３２の外周全面を覆う樹脂の層である。外皮３３の材料である外皮樹脂は、たとえば、エチレン－酢酸ビニル共重合体等のポリオレフィン、ポリテトラフルオロエチレン、エチレン－テトラフルオロエチレン共重合体等のフッ素系樹脂、ポリエステル系エラストマー、ポリオレフィン系エラストマー、フッ素系エラストマー、ポリウレタン系エラストマー、ポリアミド系エラストマー、シリコーンゴム、または、フッ素ゴム等である。外皮３３は、複数の樹脂層の積層体でも良い。複数の外皮樹脂材料を混合して、外皮３３を形成しても良い。 The outer cover 33 is a resin layer that covers the entire outer periphery of the mesh tube 32. The outer cover resin which is a material of the outer cover 33 is, for example, a polyolefin such as an ethylene-vinyl acetate copolymer, a fluororesin such as polytetrafluoroethylene, an ethylene-tetrafluoroethylene copolymer, a polyester elastomer, a polyolefin elastomer, It is a fluorine-based elastomer, a polyurethane-based elastomer, a polyamide-based elastomer, a silicone rubber, a fluorine-containing rubber, or the like. The outer cover 33 may be a laminate of a plurality of resin layers. The outer shell 33 may be formed by mixing a plurality of outer shell resin materials.
　トップコート３４は、たとえば、ウレタン系樹脂またはフッ素樹脂である。トップコート３４は、内視鏡１０の洗浄および消毒に用いる薬液等から、外皮３３を保護する。 The top coat 34 is, for example, a urethane-based resin or a fluorine resin. The top coat 34 protects the outer skin 33 from a chemical solution or the like used for cleaning and disinfecting the endoscope 10.
　ホットメルト接着剤層３８は、加熱により溶融した状態で塗布し、冷えると固まって接着するホットメルト接着剤により形成された層である。ホットメルト接着剤層３８は、網状管３２と外皮３３とを接着する。図３および図４に示すように、ホットメルト接着剤層３８は網状管３２の外周全面を覆う。 The hot-melt adhesive layer 38 is a layer formed by a hot-melt adhesive that is applied in a state of being melted by heating, and solidifies and adheres when cooled. The hot melt adhesive layer 38 bonds the mesh tube 32 and the outer cover 33. As shown in FIGS. 3 and 4, the hot melt adhesive layer 38 covers the entire outer periphery of the mesh tube 32.
　図５に示すように、ホットメルト接着剤層３８を構成するホットメルト接着剤は網状管３２を構成する素線３２１同士の隙間に若干浸透している。ホットメルト接着剤層３８と網状管３２との間の接着面積が広く、かつ、接着面の凸凹によるアンカー効果が働く。そのため、ホットメルト接着剤層３８と網状管３２とは、強固に接着されている。 (5) As shown in FIG. 5, the hot melt adhesive forming the hot melt adhesive layer 38 slightly penetrates into the gaps between the wires 321 forming the mesh tube 32. The bonding area between the hot-melt adhesive layer 38 and the braided tube 32 is large, and an anchor effect due to the unevenness of the bonding surface works. Therefore, the hot melt adhesive layer 38 and the braided tube 32 are firmly bonded.
　ホットメルト接着剤層３８の主成分は、外皮３３と同系統の樹脂材料製であることが望ましい。たとえば、外皮３３の材料にポリウレタンエラストマーを使用する場合には、ポリウレタン系のホットメルト接着剤をホットメルト接着剤層３８に使用する。外皮３３の材料にポリエステルエラストマーを使用する場合には、ポリエステル系のホットメルト接着剤をホットメルト接着剤層３８に使用する。同系統の樹脂材料同士は、強固に接続される。 The main component of the hot melt adhesive layer 38 is desirably made of the same resin material as the outer cover 33. For example, when a polyurethane elastomer is used for the material of the outer cover 33, a polyurethane-based hot melt adhesive is used for the hot melt adhesive layer 38. When a polyester elastomer is used as the material of the outer cover 33, a polyester hot melt adhesive is used for the hot melt adhesive layer 38. Resin materials of the same system are firmly connected.
　以上に説明した構成により、ホットメルト接着剤層３８は、網状管３２の外周全面にわたって外皮３３を強固に接着する。たとえば、外径１２．２ミリメートル程度の内視鏡用可撓管３０である場合、ホットメルト接着剤層３８の厚さｔ１は５０マイクロメートル程度、外皮３３の厚さｔ２は２００マイクロメートル程度であることが望ましい。 With the configuration described above, the hot melt adhesive layer 38 firmly adheres the outer skin 33 over the entire outer periphery of the mesh tube 32. For example, in the case of the flexible tube 30 for an endoscope having an outer diameter of about 12.2 mm, the thickness t1 of the hot melt adhesive layer 38 is about 50 micrometers, and the thickness t2 of the outer cover 33 is about 200 micrometers. Desirably.
　このような内視鏡用可撓管３０を使用することにより、小さい曲率半径で屈曲させた状態での捻り操作が行なわれた場合であっても、網状管３２と外皮３３との間の剥離が生じにくい。そのため、耐久性の高い内視鏡１０を提供できる。 By using such a flexible tube 30 for an endoscope, even if a twisting operation is performed in a state where the tube is bent at a small radius of curvature, the peeling between the mesh tube 32 and the outer cover 33 is performed. Is unlikely to occur. Therefore, the endoscope 10 having high durability can be provided.
　内視鏡１０を使用した後の洗浄等に、温水が使用される場合がある。そのため、ホットメルト接着剤層３８に使用するホットメルト接着剤の軟化点は、摂氏８０度以上であることが望ましく、摂氏１００度以上であることがさらに望ましい。なお、ホットメルト接着剤の軟化点の試験方法は、ＪＩＳ（Japan Industrial Standard）Ｋ６８６３－１９９４「ホットメルト接着剤の軟化点試験方法」により規定されている。 温 Warm water may be used for washing after using the endoscope 10 or the like. Therefore, the softening point of the hot melt adhesive used for the hot melt adhesive layer 38 is desirably 80 degrees Celsius or more, and more desirably 100 degrees Celsius or more. The test method for the softening point of the hot melt adhesive is defined by JIS (Japan Industrial Standard) K6863-1994 "Test Method for Softening Point of Hot Melt Adhesive".
　図６は、外皮被覆装置６０の模式図である。外皮被覆装置６０は、基材３５の外周をホットメルト接着剤層３８および外皮３３で覆う装置である。外皮被覆装置６０は、成形部６９と、硬化部６７とを備える。 FIG. 6 is a schematic view of the outer cover device 60. The outer cover device 60 is a device that covers the outer periphery of the base material 35 with the hot melt adhesive layer 38 and the outer cover 33. The outer cover device 60 includes a molding unit 69 and a curing unit 67.
　成形部６９は、押出成形機７０とクロスヘッド８１とを備える。押出成形機７０は、それぞれがクロスヘッド８１に接続された第１押出成形機７０１と第２押出成形機７０２とを含む。第１押出成形機７０１はホットメルト接着剤層３８の押出成形を行なう。第２押出成形機７０２は、外皮３３の押出成形を行なう。 The molding unit 69 includes an extruder 70 and a crosshead 81. The extruder 70 includes a first extruder 701 and a second extruder 702, each connected to the crosshead 81. The first extruder 701 extrudes the hot melt adhesive layer 38. The second extruder 702 extrudes the outer skin 33.
　基材３５は、１台の内視鏡１０用ごとに製作される。複数の基材３５が、連結部材３６により一列に連結されて、基材連結体３７を構成する。基材連結体３７は、第１ドラム６８１に巻かれた状態で供給される。 The base material 35 is manufactured for each endoscope 10. A plurality of base materials 35 are connected in a line by a connection member 36 to form a base material connection body 37. The connected base material 37 is supplied in a state of being wound around the first drum 681.
　基材連結体３７は、クロスヘッド８１の内部を通り、硬化部６７を介して第２ドラム６８２に接続されている。第１ドラム６８１および第２ドラム６８２が回転することにより、基材連結体３７はクロスヘッド８１を所定の速度で通過する。クロスヘッド８１内で、基材連結体３７の表面にホットメルト接着剤層３８および外皮３３が押出成形される。 連結 The base material linking body 37 passes through the inside of the crosshead 81 and is connected to the second drum 682 via the curing unit 67. As the first drum 681 and the second drum 682 rotate, the base material link 37 passes through the crosshead 81 at a predetermined speed. In the cross head 81, the hot melt adhesive layer 38 and the outer cover 33 are extruded on the surface of the base material linked body 37.
　硬化部６７は、押出成形した外皮３３を硬化させる。外皮３３に熱可塑性樹脂を使用する場合には、硬化部６７は冷却機である。外皮３３に紫外線硬化樹脂を使用する場合には、硬化部６７は紫外線ランプである。外皮３３に熱硬化樹脂を使用する場合には、硬化部６７はヒータである。なお、ホットメルト接着剤層３８は、温度が軟化点を下回ることにより硬化する。 The curing unit 67 cures the extruded outer skin 33. When a thermoplastic resin is used for the outer cover 33, the curing unit 67 is a cooler. When an ultraviolet curing resin is used for the outer cover 33, the curing section 67 is an ultraviolet lamp. When a thermosetting resin is used for the outer cover 33, the curing unit 67 is a heater. Note that the hot melt adhesive layer 38 is cured when the temperature falls below the softening point.
　図７は、第１押出成形機７０１の模式図である。第１押出成形機７０１は、原料容器７４を備える。原料容器７４と、前述のクロスヘッド８１との間は、略円筒状の筒部７７により接続されている。筒部７７の内部に、筒部７７と同軸にスクリュー７５が配置され、筒部７７の内面とスクリュー７５との間に加熱流路７６が形成されている。 FIG. 7 is a schematic diagram of the first extruder 701. The first extruder 701 includes a raw material container 74. The raw material container 74 and the above-described crosshead 81 are connected by a substantially cylindrical tubular portion 77. A screw 75 is disposed coaxially with the tubular portion 77 inside the tubular portion 77, and a heating channel 76 is formed between the screw 75 and the inner surface of the tubular portion 77.
　筒部７７の外側に、加熱部７１が配置されている。加熱部７１は、原料容器７４に近い側から第１加熱部７１１、第２加熱部７１２および第３加熱部７１３に分かれている。第１加熱部７１１、第２加熱部７１２および第３加熱部７１３は、それぞれヒータ７２および送風機７３を備える。図示を省略する制御装置により、ヒータ７２および送風機７３が制御されて、加熱流路７６温度が所定の温度に設定される。なお、加熱部７１は４個以上に分かれていても良い。 加熱 The heating unit 71 is disposed outside the cylindrical unit 77. The heating unit 71 is divided into a first heating unit 711, a second heating unit 712, and a third heating unit 713 from the side near the raw material container 74. The first heating unit 711, the second heating unit 712, and the third heating unit 713 include a heater 72 and a blower 73, respectively. The heater 72 and the blower 73 are controlled by a control device (not shown), and the temperature of the heating channel 76 is set to a predetermined temperature. Note that the heating unit 71 may be divided into four or more.
　原料容器７４には、粉状または粒状の原料が投入される。原料容器７４内の原料が加熱流路７６に入り、スクリュー７５の回転によりクロスヘッド８１内に送り込まれる。スクリュー７５の回転速度、すなわち原料をクロスヘッド８１に供給する速度は、図示を省略する制御装置により制御される。 粉 Powder or granular raw material is charged into the raw material container 74. The raw material in the raw material container 74 enters the heating channel 76 and is sent into the crosshead 81 by the rotation of the screw 75. The rotation speed of the screw 75, that is, the speed at which the raw material is supplied to the crosshead 81, is controlled by a control device (not shown).
　第２押出成形機７０２の構成も、図７に示す第１押出成形機７０１と同様である。第２押出成形機７０２は、外皮樹脂を押出成形する。なお、第２押出成形機７０２の加熱部７１は、２個または４個以上に分かれていても良く、分かれていなくても良い。 The configuration of the second extruder 702 is the same as that of the first extruder 701 shown in FIG. The second extruder 702 extrudes the skin resin. In addition, the heating unit 71 of the second extruder 702 may be divided into two or four or more, and may not be divided.
　図８は、クロスヘッド８１の模式図である。クロスヘッド８１は第１型６１、第２型６２および第３型６３を有する。第１型６１は中心軸に沿って第１基材孔６１１を有する、略円筒形状である。第２型６２は、太径部６２８と細径部６２９とを備える略段付円筒形状である。太径部６２８の内面は、第１型６１の外面を覆う。細径部６２９の内面は、第１基材孔６１１と同軸に配置されており、第１基材孔６１１よりも若干太い第２基材孔６２２を形成している。 FIG. 8 is a schematic view of the crosshead 81. The crosshead 81 has a first die 61, a second die 62, and a third die 63. The first mold 61 has a substantially cylindrical shape having a first base material hole 611 along the central axis. The second mold 62 has a substantially stepped cylindrical shape including a large diameter portion 628 and a small diameter portion 629. The inner surface of the large diameter portion 628 covers the outer surface of the first mold 61. The inner surface of the small diameter portion 629 is arranged coaxially with the first base material hole 611, and forms a second base material hole 622 slightly thicker than the first base material hole 611.
　第３型６３は、細径部６２９の外面を覆う略円筒形状である。第３型６３の内面の一端は、第２基材孔６２２よりも若干太い第３基材孔６３３を形成している。第１基材孔６１１、第２基材孔６２２および第３基材孔６３３は、同一軸上に連続して配置されており、内部に基材連結体３７が挿通される。 The third mold 63 has a substantially cylindrical shape that covers the outer surface of the small diameter portion 629. One end of the inner surface of the third die 63 forms a third base material hole 633 that is slightly thicker than the second base material hole 622. The first base material hole 611, the second base material hole 622, and the third base material hole 633 are continuously arranged on the same axis, and the base material connected body 37 is inserted therein.
　第１型６１の外面と第２型６２の内面との間に、第１成形流路６５１が形成されている。第１成形流路６５１は、第１押出成形機７０１に接続されている。第２型６２の外面と第３型６３の内面との間に第２成形流路６５２が形成されている。第２成形流路６５２は第２押出成形機７０２に接続されている。 第 A first molding channel 651 is formed between the outer surface of the first die 61 and the inner surface of the second die 62. The first forming channel 651 is connected to the first extruder 701. A second molding channel 652 is formed between the outer surface of the second die 62 and the inner surface of the third die 63. The second molding channel 652 is connected to the second extruder 702.
　図６から図８を使用して、外皮被覆装置６０の動作を説明する。前述のとおり、第１ドラム６８１および第２ドラム６８２が回転することにより、基材連結体３７はクロスヘッド８１を所定の速度で通過する。第１押出成形機７０１の原料容器７４内のホットメルト接着剤が、加熱流路７６に供給される。スクリュー７５の回転により、ホットメルト接着剤が加熱流路７６の内部をクロスヘッド８１に向けて押し出される。 The operation of the skin covering device 60 will be described with reference to FIGS. As described above, as the first drum 681 and the second drum 682 rotate, the base material link 37 passes through the crosshead 81 at a predetermined speed. The hot melt adhesive in the raw material container 74 of the first extruder 701 is supplied to the heating channel 76. By the rotation of the screw 75, the hot melt adhesive is extruded inside the heating channel 76 toward the crosshead 81.
　ヒータ７２および送風機７３により、加熱流路７６内の温度が所定の値に調整される。表１に、軟化点が約１２０度であるホットメルト接着剤を用いる場合の、第１加熱部７１１から第３加熱部７１３のそれぞれの中央部における、加熱流路７６内のホットメルト接着剤の温度の例を示す。単位は摂氏である。 (4) The temperature in the heating channel 76 is adjusted to a predetermined value by the heater 72 and the blower 73. Table 1 shows that when a hot melt adhesive having a softening point of about 120 degrees is used, the hot melt adhesive in the heating channel 76 at the center of each of the first heating unit 711 to the third heating unit 713 is used. An example of a temperature is shown. The unit is Celsius.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　ホットメルト接着剤が加熱流路７６を通過する過程について説明する。粉状または粒状のホットメルト接着剤は、第１加熱部７１１内で予熱され、第２加熱部７１２の中央付近で流体に変化する。ホットメルト接着剤は、第３加熱部７１３内でさらに加熱されて、粘性の低い流体になる。 The process in which the hot melt adhesive passes through the heating channel 76 will be described. The powdery or granular hot melt adhesive is preheated in the first heating unit 711, and changes into a fluid near the center of the second heating unit 712. The hot melt adhesive is further heated in the third heating unit 713 to become a low viscosity fluid.
　ホットメルト接着剤は、第１成形流路６５１を通過して、基材連結体３７の表面に押出成形される。ホットメルト接着剤は粘性が低い状態であるため、図１１を使用して説明したように、網状管３２を構成する素線３２１同士の隙間に若干浸透する。なお、ホットメルト接着剤の厚さおよび網状管３２への浸透量は、基材連結体３７の速度、および、スクリュー７５の回転速度により調整される。 The hot melt adhesive passes through the first molding flow path 651 and is extruded on the surface of the base member linked body 37. Since the hot-melt adhesive has a low viscosity, as described with reference to FIG. 11, the hot-melt adhesive slightly penetrates into the gap between the strands 321 constituting the mesh tube 32. Note that the thickness of the hot melt adhesive and the amount of penetration into the mesh tube 32 are adjusted by the speed of the base member connected body 37 and the rotation speed of the screw 75.
　前述のとおり、内視鏡用可撓管３０には、ファイバーバンドル、ケーブル束および各種チューブ等の内蔵物が挿通される。ホットメルト接着剤が内視鏡用可撓管３０の内面に突出した状態で硬化した場合には、内蔵物の挿通に支障が生じる。したがって、基材連結体３７の速度、および、スクリュー７５の回転速度は、ホットメルト接着剤が螺旋管３１の内側に浸透しないように調整される。 As described above, built-in components such as a fiber bundle, a cable bundle, and various tubes are inserted into the flexible tube 30 for an endoscope. If the hot-melt adhesive is cured while protruding from the inner surface of the flexible tube 30 for an endoscope, the insertion of the built-in object is hindered. Therefore, the speed of the base material link body 37 and the rotation speed of the screw 75 are adjusted so that the hot melt adhesive does not penetrate inside the spiral tube 31.
　図３に示すように、螺旋管３１の隙間は素線３２１同士の隙間に比べて大きいため、螺旋管３１の隙間に到達したホットメルト接着剤は容易に螺旋管３１の内面に到達する。したがって、基材連結体３７の速度、および、スクリュー７５の回転速度は、ホットメルト接着剤が網状管３２の内面に浸透しないように調整されることが、さらに望ましい。 As shown in FIG. 3, since the gap between the spiral tubes 31 is larger than the gap between the wires 321, the hot melt adhesive that has reached the gap between the spiral tubes 31 easily reaches the inner surface of the spiral tube 31. Therefore, it is further desirable that the speed of the base material connector 37 and the rotation speed of the screw 75 are adjusted so that the hot melt adhesive does not penetrate into the inner surface of the mesh tube 32.
　同様にして、外皮樹脂が第２押出成形機７０２から第２成形流路６５２を介して、ホットメルト接着剤の表面に押出成形されて、外皮３３を形成する。外皮３３は、硬化部６７で硬化する。ホットメルト接着剤は、軟化点よりも温度が低下した場合に硬化する。ホットメルト接着剤は、外皮３３が押出成形される前に硬化しても良いし、硬化部６７において硬化しても良い。 Similarly, the outer cover resin is extruded from the second extruder 702 to the surface of the hot melt adhesive through the second forming flow path 652 to form the outer cover 33. The outer skin 33 is hardened by the hardening section 67. Hot melt adhesives cure when the temperature falls below the softening point. The hot melt adhesive may be cured before the outer cover 33 is extruded, or may be cured in the cured portion 67.
　なお、外皮３３は２層以上の層により構成されていても良い。たとえば、複数の第２押出成形機７０２と複数の第２成形流路６５２とを設けることにより、外皮３３を多層に構成できる。 The outer skin 33 may be composed of two or more layers. For example, by providing a plurality of second extrusion molding machines 702 and a plurality of second molding channels 652, the outer cover 33 can be configured in a multilayer.
　硬化部６７を通過した基材連結体３７は、図４に示すように第２ドラム６８２に巻き取られて、次の製造工程に投入される。なお、第２ドラム６８２に巻き取る変わりに、連結部材３６を外して、１本ずつに分離しても良い。硬化部６７と第２ドラム６８２との間で、トップコート３４を付加しても良い。 (4) The linked base material 37 that has passed through the hardening section 67 is wound around a second drum 682 as shown in FIG. Note that instead of winding around the second drum 682, the connecting member 36 may be removed and separated one by one. The top coat 34 may be added between the curing section 67 and the second drum 682.
　本実施の形態によると、小型の製造装置で内視鏡用可撓管３０を製造可能な製造方法等を提供できる。本実施の形態によると、外皮３３と網状管３２とが強固に接着されており、耐久性の高い内視鏡用可撓管３０を提供できる。 According to the present embodiment, it is possible to provide a manufacturing method or the like that can manufacture the endoscope flexible tube 30 with a small-sized manufacturing apparatus. According to the present embodiment, the outer cover 33 and the mesh tube 32 are firmly adhered to each other, so that the endoscope flexible tube 30 with high durability can be provided.
　本実施の形態によると、原料容器７４とクロスヘッド８１との間で、加熱流路７６内の温度を順次上昇させることにより、ホットメルト接着剤の変質を防止する内視鏡用可撓管３０の製造方法を提供できる。 According to the present embodiment, by sequentially increasing the temperature in the heating flow path 76 between the raw material container 74 and the crosshead 81, the endoscope flexible tube 30 for preventing deterioration of the hot-melt adhesive is prevented. Can be provided.
　ホットメルト接着剤層３８の材料に、たとえば湿気硬化型ウレタン系ホットメルト接着剤等の、いわゆる反応性ホットメルト接着剤を使用しても良い。反応性ホットメルト接着剤は、溶融状態で網状管３２と外皮３３とを接着した後に硬化反応が進行することにより、接着時と同じ温度でも再溶融しなくなる。そのため、耐熱性の高い内視鏡用可撓管３０および内視鏡１０を提供できる。 The material of the hot melt adhesive layer 38 may be a so-called reactive hot melt adhesive such as a moisture-curable urethane hot melt adhesive. The reactive hot melt adhesive does not re-melt at the same temperature as at the time of bonding because the curing reaction proceeds after bonding the reticulated tube 32 and the outer cover 33 in a molten state. Therefore, the endoscope flexible tube 30 and the endoscope 10 having high heat resistance can be provided.
［実施の形態２］
　本実施の形態は、ホットメルト接着剤と外皮３３とを同時に押出成形する内視鏡用可撓管３０の製造方法に関する。実施の形態１と共通する部分については、説明を省略する。 [Embodiment 2]
The present embodiment relates to a method of manufacturing a flexible tube 30 for an endoscope in which a hot melt adhesive and an outer cover 33 are simultaneously extruded. The description of the parts common to the first embodiment is omitted.
　図９は、実施の形態２のクロスヘッド８１の模式図である。クロスヘッド８１は、第１型６１および第２型６２を有する。第１型６１は中心軸に沿って第１基材孔６１１を有する、略円筒形状である。第２型６２は、第１型６１の外面を覆う略円筒形状である。 FIG. 9 is a schematic diagram of the crosshead 81 according to the second embodiment. The crosshead 81 has a first die 61 and a second die 62. The first mold 61 has a substantially cylindrical shape having a first base material hole 611 along the central axis. The second mold 62 has a substantially cylindrical shape that covers the outer surface of the first mold 61.
　第２型６２の内面の一端は、第１基材孔６１１よりも若干太い第２基材孔６２２を形成している。第１基材孔６１１と第２基材孔６２２とは、同一軸上に連続して配置されており、内部に基材連結体３７が挿通される。 一端 One end of the inner surface of the second die 62 forms a second base material hole 622 that is slightly thicker than the first base material hole 611. The first base material hole 611 and the second base material hole 622 are continuously arranged on the same axis, and the base material connected body 37 is inserted therein.
　第１型６１の外面と第２型６２の内面との間に、第１成形流路６５１が形成されている。第１成形流路６５１は、第１押出成形機７０１に接続されている。第２型６２内に、略円筒形状の第２成形流路６５２が形成されている。第２成形流路６５２は第２押出成形機７０２に接続されている。第１成形流路６５１と第２成形流路６５２とは合流して、第２基材孔６２２に接続されている。 第 A first molding channel 651 is formed between the outer surface of the first die 61 and the inner surface of the second die 62. The first forming channel 651 is connected to the first extruder 701. In the second mold 62, a substantially cylindrical second molding flow path 652 is formed. The second molding channel 652 is connected to the second extruder 702. The first molding flow path 651 and the second molding flow path 652 join and are connected to the second base material hole 622.
　第１押出成形機７０１から押し出されたホットメルト接着剤と、第２押出成形機７０２から押し出された外皮３３の材料の樹脂とは、２層になって、基材連結体３７の表面に押出成形される。 The hot melt adhesive extruded from the first extruder 701 and the resin of the outer skin 33 extruded from the second extruder 702 are formed into two layers and extruded on the surface of the base member link body 37. Molded.
　本実施の形態によると、ホットメルト接着剤と外皮３３とは溶融した状態で接触し、一緒に流動した後に硬化するため、界面で強固に接合される。そのため、両者の間での剥離が生じにくい内視鏡用可撓管３０を製造できる。 According to the present embodiment, the hot melt adhesive and the outer skin 33 come into contact with each other in a molten state, and are hardened after flowing together, so that they are firmly joined at the interface. Therefore, it is possible to manufacture the flexible tube 30 for an endoscope in which peeling between the two hardly occurs.
［実施の形態３］
　本実施の形態は、挿入方向に硬さが変化する内視鏡用可撓管３０に関する。実施の形態１と共通する部分については、説明を省略する。 [Embodiment 3]
The present embodiment relates to an endoscope flexible tube 30 whose hardness changes in the insertion direction. The description of the parts common to the first embodiment is omitted.
　図１０は、実施の形態３の内視鏡用可撓管３０の縦断面図である。外皮３３は、第１外皮３３１の外側が、第２外皮３３２により覆われた構成である。ホットメルト接着剤層３８は、図１０の左側から右側に向けて徐々に厚くなっている。第１外皮３３１は、図１０の左側から右側に向けて徐々に薄くなっている。ホットメルト接着剤層３８と第１外皮３３１との厚さの合計、および、第２外皮３３２の厚さは、一様である。 FIG. 10 is a longitudinal sectional view of the flexible tube 30 for an endoscope according to the third embodiment. The outer skin 33 has a configuration in which the outside of the first outer skin 331 is covered by a second outer skin 332. The hot melt adhesive layer 38 gradually increases in thickness from left to right in FIG. The first outer skin 331 is gradually thinned from the left side to the right side in FIG. The sum of the thicknesses of the hot melt adhesive layer 38 and the first outer skin 331 and the thickness of the second outer skin 332 are uniform.
　なお、図１０においては、ホットメルト接着剤層３８および第１外皮３３１の厚さの変化を誇張して示す。ホットメルト接着剤層３８および第１外皮３３１の厚さは、内視鏡用可撓管３０の全長にわたって変化しても、内視鏡用可撓管３０の一部分において変化しても良い。 In FIG. 10, the change in the thickness of the hot melt adhesive layer 38 and the thickness of the first shell 331 are exaggerated. The thickness of the hot melt adhesive layer 38 and the first outer cover 331 may be changed over the entire length of the flexible tube 30 for an endoscope, or may be changed in a part of the flexible tube 30 for an endoscope.
　ホットメルト接着剤層３８と、第１外皮３３１との硬さは異なる。本実施の形態によると、均一な太さで、挿入方向に硬さが変化する内視鏡用可撓管３０を提供できる。なお、第２外皮３３２の厚さは一様であるため、全体に均質な外観を有する内視鏡用可撓管３０を提供できる。 The hardness of the hot melt adhesive layer 38 is different from that of the first shell 331. According to the present embodiment, it is possible to provide an endoscope flexible tube 30 having a uniform thickness and a hardness that changes in the insertion direction. In addition, since the thickness of the second outer skin 332 is uniform, it is possible to provide the flexible tube 30 for an endoscope having a uniform appearance as a whole.
［実施の形態４］
　本実施の形態は、網状管３２へのホットメルト接着剤の浸透量が挿入方向に変化する内視鏡用可撓管３０に関する。実施の形態１と共通する部分については、説明を省略する。 [Embodiment 4]
The present embodiment relates to a flexible tube 30 for an endoscope in which a penetration amount of a hot melt adhesive into a mesh tube 32 changes in an insertion direction. The description of the parts common to the first embodiment is omitted.
　図１１から図１３は、実施の形態４の内視鏡用可撓管３０の横断面拡大図である。図１１から図１３は、挿入方向にそれぞれ異なる位置で切断した横断面を、図５と同様に拡大した拡大図を示す。たとえば内視鏡用可撓管３０は、先端側の端部から操作部側の端部にかけて、図５、図１１、図１２および図１３に示す断面を順次有する。 FIGS. 11 to 13 are enlarged cross-sectional views of the flexible tube 30 for an endoscope according to the fourth embodiment. 11 to 13 show enlarged cross-sectional views cut at different positions in the insertion direction, similarly to FIG. For example, the flexible tube 30 for an endoscope has sections shown in FIGS. 5, 11, 12, and 13 in order from an end on the distal end side to an end on the operation section side.
　図５、図１１および図１２の順に、ホットメルト接着剤の網状管３２への浸透深さが深くなっている。図１３においては、ホットメルト接着剤は網状管３２全体に浸透し、螺旋管３１一部にも浸透している。 、 The depth of penetration of the hot melt adhesive into the mesh tube 32 is increased in the order of FIG. 5, FIG. 11 and FIG. In FIG. 13, the hot-melt adhesive has penetrated the entire reticulated tube 32 and has also penetrated a part of the spiral tube 31.
　浸透深さが深いほど、内視鏡用可撓管３０の硬度が増す。これにより、均一な太さで、先端側から操作部側にかけて徐々に硬さが上昇する内視鏡用可撓管３０を提供できる。 硬度 The hardness of the endoscope flexible tube 30 increases as the penetration depth increases. Thereby, it is possible to provide the endoscope flexible tube 30 having a uniform thickness and having a gradual increase in hardness from the distal end side to the operation unit side.
　各実施例で記載されている技術的特徴（構成要件）はお互いに組合せ可能であり、組み合わせすることにより、新しい技術的特徴を形成することができる。
　今回開示された実施の形態はすべての点で例示であって、制限的なものでは無いと考えられるべきである。本発明の範囲は、上記した意味では無く、請求の範囲によって示され、請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 The technical features (components) described in each embodiment can be combined with each other, and a new technical feature can be formed by combining the technical features.
The embodiment disclosed this time is an example in all respects and should be considered as not being restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
　１０　　内視鏡
　２０　　挿入部
　２１　　軟性部
　２２　　湾曲部
　２３　　先端部
　２６　　折れ止め部
　３０　　内視鏡用可撓管
　３１　　螺旋管
　３２　　網状管
　３２１　素線
　３３　　外皮
　３３１　第１外皮
　３３２　第２外皮
　３４　　トップコート
　３５　　基材
　３６　　連結部材
　３７　　基材連結体
　３８　　ホットメルト接着剤層
　４０　　操作部
　４１　　湾曲ノブ
　４２　　チャンネル入口
　４３　　鉗子栓
　５０　　コネクタ部
　５１　　観察窓
　５２　　照明窓
　５３　　送気ノズル
　５４　　送水ノズル
　５５　　チャンネル出口
　５９　　ユニバーサルコード
　６０　　外皮被覆装置
　６１　　第１型
　６１１　第１基材孔
　６２　　第２型
　６２２　第２基材孔
　６２８　太径部
　６２９　細径部
　６３　　第３型
　６３３　第３基材孔
　６５１　第１成形流路
　６５２　第２成形流路
　６７　　硬化部
　６８１　第１ドラム
　６８２　第２ドラム
　６９　　成形部
　７０　　押出成形機
　７０１　第１押出成形機
　７０２　第２押出成形機
　７１　　加熱部
　７１１　第１加熱部
　７１２　第２加熱部
　７１３　第３加熱部
　７２　　ヒータ
　７３　　送風機
　７４　　原料容器
　７５　　スクリュー
　７６　　加熱流路
　７７　　筒部
　８１　　クロスヘッド DESCRIPTION OF SYMBOLS 10 Endoscope 20 Insert part 21 Flexible part 22 Curved part 23 Tip part 26 Break prevention part 30 Flexible tube for endoscope 31 Spiral tube 32 Reticulated tube 321 Element wire 33 Outer skin 331 First outer skin 332 Second outer skin 34 Top coat 35 base material 36 connecting member 37 base material connected body 38 hot melt adhesive layer 40 operating part 41 curved knob 42 channel inlet 43 forceps plug 50 connector part 51 observation window 52 illumination window 53 air supply nozzle 54 water supply nozzle 55 channel outlet 59 universal Code 60 Skin coating device 61 First die 611 First base hole 62 Second die 622 Second base hole 628 Large diameter portion 629 Small diameter portion 63 Third die 633 Third base hole 651 First forming flow path 652 Second forming channel 67 Hardening section 681 First drum 682 Second drum 69 Forming section 70 Dispensing machine 701 First extruder 702 Second extruder 71 Heating section 711 First heating section 712 Second heating section 713 Third heating section 72 Heater 73 Blower 74 Raw material container 75 Screw 76 Heating channel 77 Tube section 81 Crosshead

Claims (9)

  1. 　ホットメルト接着剤を溶融し、
    　筒状の基材の外周に前記ホットメルト接着剤を押出成形する
    　内視鏡用可撓管の製造方法。     Melt the hot melt adhesive,
    A method for manufacturing a flexible tube for an endoscope, comprising extruding the hot melt adhesive on the outer periphery of a cylindrical base material.
  2. 　押出成形した前記ホットメルト接着剤の外周に外皮樹脂を押出成形する
    　請求項１に記載の内視鏡用可撓管の製造方法。     The method for producing a flexible tube for an endoscope according to claim 1, wherein an outer shell resin is extruded around the extruded hot melt adhesive.
  3. 　溶融した前記ホットメルト接着剤とともに、該ホットメルト接着剤を覆う外皮樹脂を押出成形する
    　請求項１に記載の内視鏡用可撓管の製造方法。     The method for producing a flexible tube for an endoscope according to claim 1, wherein an outer shell resin covering the hot melt adhesive is extruded together with the molten hot melt adhesive.
  4. 　前記ホットメルト接着剤は、前記外皮樹脂と共通の成分を含む
    　請求項２または請求項３に記載の内視鏡用可撓管の製造方法。     The method for manufacturing a flexible tube for an endoscope according to claim 2 or 3, wherein the hot melt adhesive contains a component common to the outer skin resin.
  5. 　前記基材は、筒状に編組された複数の素線を有する網状管を外面に備え、
    　前記ホットメルト接着剤は、前記複数の素線の間に浸透する
    　請求項１から請求項４のいずれか一つに記載の内視鏡用可撓管の製造方法。     The base material is provided on the outer surface with a braided tube having a plurality of strands braided in a cylindrical shape,
    The method for manufacturing a flexible tube for an endoscope according to any one of claims 1 to 4, wherein the hot melt adhesive penetrates between the plurality of strands.
  6. 　筒状の基材と、
    　前記基材の外周を覆うホットメルト接着剤と、
    　前記ホットメルト接着剤の外周を覆う外皮樹脂と
    　を備える内視鏡用可撓管。     A cylindrical base material,
    A hot melt adhesive covering the periphery of the substrate,
    A flexible resin for an endoscope, comprising: a skin resin covering an outer periphery of the hot melt adhesive.
  7. 　前記基材は、筒状に編組された複数の素線を有する網状管を外面に備え、
    　前記ホットメルト接着剤は、前記複数の素線の間に浸透している
    　請求項６に記載の内視鏡用可撓管。     The base material is provided on the outer surface with a braided tube having a plurality of strands braided in a cylindrical shape,
    The flexible tube for an endoscope according to claim 6, wherein the hot melt adhesive has penetrated between the plurality of strands.
  8. 　前記ホットメルト接着剤は、前記網状管の内側に浸透していない
    　請求項７に記載の内視鏡用可撓管の製造方法。     The method for manufacturing a flexible tube for an endoscope according to claim 7, wherein the hot melt adhesive does not permeate into the inside of the mesh tube.
  9. 　筒状の基材と、前記基材の外周を覆うホットメルト接着剤と、前記ホットメルト接着剤の外周を覆う外皮樹脂とを備える内視鏡用可撓管を挿入部の外装に有する
    　内視鏡。     An endoscope having a flexible tube for an endoscope including a tubular base material, a hot melt adhesive covering the outer periphery of the base material, and a skin resin covering the outer periphery of the hot melt adhesive, is provided on the exterior of the insertion portion. mirror.
PCT/JP2019/019341 2018-06-20 2019-05-15 Endoscopic flexible tube production method, endoscopic flexible tube, and endoscope WO2019244521A1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6147918A (en) * 1984-08-14 1986-03-08 Fuji Photo Optical Co Ltd Manufacture of flexible tube for endoscope
JPH03169535A (en) * 1989-11-29 1991-07-23 Machida Seisakusho:Kk Manufacture of flexible pipe
JPH1142204A (en) * 1997-07-24 1999-02-16 Olympus Optical Co Ltd Manufacture of flexible tube for endoscope
JP2006014772A (en) * 2004-06-30 2006-01-19 Olympus Corp Apparatus and method for manufacturing flexible tube for endoscope
JP2006109997A (en) * 2004-10-13 2006-04-27 Olympus Corp Solvent application apparatus for flexible tube of endoscope
JP2007050117A (en) * 2005-08-18 2007-03-01 Pentax Corp Flexible tube for endoscope
JP2012192000A (en) * 2011-03-15 2012-10-11 Fujifilm Corp Endoscope

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006212278A (en) 2005-02-04 2006-08-17 Pentax Corp Manufacturing method of insertion flexible tube, insertion flexible tube and endoscope

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6147918A (en) * 1984-08-14 1986-03-08 Fuji Photo Optical Co Ltd Manufacture of flexible tube for endoscope
JPH03169535A (en) * 1989-11-29 1991-07-23 Machida Seisakusho:Kk Manufacture of flexible pipe
JPH1142204A (en) * 1997-07-24 1999-02-16 Olympus Optical Co Ltd Manufacture of flexible tube for endoscope
JP2006014772A (en) * 2004-06-30 2006-01-19 Olympus Corp Apparatus and method for manufacturing flexible tube for endoscope
JP2006109997A (en) * 2004-10-13 2006-04-27 Olympus Corp Solvent application apparatus for flexible tube of endoscope
JP2007050117A (en) * 2005-08-18 2007-03-01 Pentax Corp Flexible tube for endoscope
JP2012192000A (en) * 2011-03-15 2012-10-11 Fujifilm Corp Endoscope

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