WO2013069312A1 - 樹脂製端面突合せ継手とその継手の溶着方法並びに配管器材 - Google Patents

樹脂製端面突合せ継手とその継手の溶着方法並びに配管器材 Download PDF

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Publication number
WO2013069312A1
WO2013069312A1 PCT/JP2012/050797 JP2012050797W WO2013069312A1 WO 2013069312 A1 WO2013069312 A1 WO 2013069312A1 JP 2012050797 W JP2012050797 W JP 2012050797W WO 2013069312 A1 WO2013069312 A1 WO 2013069312A1
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Prior art keywords
joint
welded
welding
welded annular
clamp
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PCT/JP2012/050797
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English (en)
French (fr)
Inventor
長谷川　隆
Original Assignee
株式会社キッツエスシーティー
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Application filed by 株式会社キッツエスシーティー filed Critical 株式会社キッツエスシーティー
Priority to CN201280025755.6A priority Critical patent/CN103562612B/zh
Priority to KR1020137027517A priority patent/KR101956901B1/ko
Priority to US14/115,180 priority patent/US9982807B2/en
Publication of WO2013069312A1 publication Critical patent/WO2013069312A1/ja

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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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/22—Pipes composed of a plurality of segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1432—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface direct heating of the surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B29C65/7805—Positioning the parts to be joined, e.g. aligning, indexing or centring the parts to be joined comprising positioning features
    • B29C65/7808—Positioning the parts to be joined, e.g. aligning, indexing or centring the parts to be joined comprising positioning features in the form of holes or slots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B29C65/7844—Holding or clamping means for handling purposes cooperating with specially formed features of at least one of the parts to be joined, e.g. cooperating with holes or ribs of at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5223—Joining tubular articles for forming corner connections or elbows, e.g. for making V-shaped pieces
    • B29C66/52231—Joining tubular articles for forming corner connections or elbows, e.g. for making V-shaped pieces with a right angle, e.g. for making L-shaped pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B29C66/52241—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/02—Welded joints
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L43/00—Bends; Siphons
    • F16L43/008—Bends; Siphons made from plastic material
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1412—Infrared [IR] radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis

Definitions

  • the present invention relates to a resin end face butt joint used in the semiconductor industry, food industry, pharmaceutical industry, biotech industry, chemical industry, etc., a welding method for the joint, and piping equipment.
  • Piping materials used in fields such as the semiconductor industry, food industry, pharmaceutical industry, biotech industry, and chemical industry require chemical resistance, heat resistance, and high cleanliness.
  • a fluororesin such as PFA (perfluoroalkoxyethylene copolymer resin) is suitable.
  • the piping of a production line in such an industrial field may be constituted by end-face butt welding of a joint made of a thermoplastic resin made of PFA resin or the joint and a tube.
  • a welding machine of Patent Document 1 As a device for welding the pipe end faces of workpieces by this method, a welding machine of Patent Document 1 is known. As shown in FIG. 9, this welding machine 1 has a pair of works 3 and 3 that are welded in a non-contact state on both sides of the heater 2, and heats and melts the pipe end surfaces 4 and 4. In order to fix the tube end surfaces 4 and 4 of the workpieces 3 and 3 at an appropriate distance without contacting the heater 2, the tube end surfaces 4 and 4 of the workpieces 3 and 3 are in an appropriate molten state. A pair of clamps 5, 5 are provided on both sides of the heater 2 in order to move at least one of the pipe end faces on the same axis later and press and weld the pipe end faces 4, 4 of the workpieces 3, 3. 5, the workpieces 3 and 3 are clamped and held.
  • Patent Document 2 introduces a welding method in which such a welding apparatus is used to weld workpieces while preventing harmful inner surface beads.
  • the present invention has been developed in order to solve the above-described problems, and the object of the present invention is to use a normal welding machine even when welding a joint having a short cylindrical weld ring portion.
  • a welding method for the joint, and piping equipment that can secure a fixing allowance and an appropriate inter-center dimension with a clamp, and at the same time be coaxially positioned. is there.
  • the joint base is provided with a plurality of welded annular parts communicating with the flow passages in the joint base, and is coaxial with at least one welded annular part of the welded annular part.
  • the invention according to claim 2 is a resin end face butt-matching in which a welded annular portion is formed in a short cylindrical shape, and a fixed portion formed coaxially with the welded annular portion is a circle having the same outer diameter as the outer diameter of the welded annular portion. It is a joint.
  • the invention according to claim 3 is a resin end face butt joint in which the welded annular portion provided on the joint base is one of an elbow shape, a tee shape, or an angle tee shape.
  • a circular fixing portion is integrally formed on the outer periphery of the joint base portion on the same axis as the welded annular portion provided on the joint base portion, and the fixing portion is held and fixed by a clamp of a welding machine. And welding the pipe end faces by pressing the welded annular parts together after the end faces of the welded annular parts are heated and melted with a non-contact heater. It is.
  • the fixing portion of the joint formed with the welded annular portion in a short cylinder shape is clamped and fixed by a clamp, and then the welded annular portion of the short cylindrical shape is welded to obtain the shortest inter-center dimension. It is the welding method of the resin end face butt joints which is the shortest weld.
  • the invention according to claim 6 is an end face of a short cylindrical welded annular part in which a fixed part is held and fixed by a clamp, an end face of a tube or a pipe end face of a mechanical joint, a sensor such as a valve, a pressure, a flow rate, or a filter.
  • This is a welding method for a resin end face butt joint in which any of the workpieces on the connection end face is welded.
  • the invention according to claim 7 is provided with a plurality of welded annular portions communicating with the flow path in the joint base at the joint base, coaxially with at least one welded annular portion of the welded annular portion, and outside the joint base.
  • a piping equipment comprising a resin end face butt joint having a fixing part for a welder clamp at an end, and a welding method for fixing the fixing part to a welder by clamping and holding the fixing part with a clamp. .
  • a short cylindrical weld ring portion It is possible to reliably and easily weld various types of thermoplastic resin joints, and in particular, it is possible to weld the joints to each other, making it possible to reduce the size of the equipment itself and reducing the piping space and making it compact. Can contribute significantly.
  • the fixed portion is a circle having the same outer diameter as the outer diameter of the welded annular portion, it is tightened on the same axis by a clamp of a normal welder without requiring a special jig. Since it can fix and can fully secure the fixing margin which is the length for a fixed width, workability and workability are remarkably good.
  • the welded annular portion has a short cylindrical shape and cannot secure a length corresponding to the fixed width, it can be easily clamped and fixed with a clamp of a normal welder and an appropriate core It is possible to provide a useful welding method that can be fixed with a space dimension, can be securely held on the same axis, can be easily aligned, and has no fear of displacement.
  • the joint member having the shortest inter-center dimension can be easily configured, which contributes significantly to downsizing.
  • not only the joints but also the work such as the joint and the tube, the mechanical joint, or the valve can be reliably secured in a state in which the fixing part of the joint having the short cylindrical welded annular part is fastened and fixed. Can be welded to.
  • FIG. 1 It is the perspective view which showed the elbow-shaped joint of the resin end surface butt joints in this invention. It is sectional drawing of FIG. It is front explanatory drawing which shows the state which welds the joints of FIG. 1 shortest. It is an enlarged front view of the piping equipment which welded the joint shown in FIG. It is the perspective view which showed the tee-shaped joint of the resin end surface butt joints in this invention. It is the perspective view which showed the angle-tee-shaped joint of the resin end surface butt joints in this invention. (A) is explanatory drawing which shows the state which welds the joint and elbow joint which have the welding annular part of a short cylinder shape.
  • (B) is explanatory drawing which shows the state which welds the coupling and tube which have a short cylinder-shaped welding annular part.
  • (C) is explanatory drawing which shows the state which welds the joint which has a welded annular part of a short cylinder shape, and the pipe of a valve
  • (D) is explanatory drawing which shows the state which welds the joint of a short cylinder-shaped welded annular part, and the pipe of a mechanical joint. It is explanatory drawing which shows the state which press-fits the sleeve by clamp
  • FIG. 1 and 2 show an elbow-shaped joint of a resin end face butt joint according to the present invention
  • FIG. 1 is a perspective view of the joint viewed obliquely from above
  • FIG. 2 is a sectional view of the joint. ing.
  • the resin joint is made of a thermoplastic resin, but the thermoplastic resin is a fluororesin such as PFA, PTFE, FEP, ETFE, PVDF, PVF, PCTFE, ECTFE, or vinylidene chloride, vinyl chloride, vinyl acetate, polyvinyl alcohol, Examples include styrene, ABS, polycarbonate, polyethylene, ultra-high molecular polyethylene, polypropylene, acrylic, butyrate, acetate, polyamide, polyacetal, AS, and vinylidene fluoride.
  • the resin end face butt joint in the present invention uses PFA.
  • an elbow-shaped joint 11 of a resin end face butt joint is composed of a joint base 12 having a flow path 15 therein, a welded annular part 13 for welding a workpiece, and an end tube-shaped welded annular part 14. Yes.
  • Fixing portions 18 and 19 are provided at the outer end of the joint base 12 so as to be clamped and clamped by clamps of the welding machine, coaxially with the center axes 16 and 17 of the welded annular portions 13 and 14.
  • the welded annular portions 13 and 14 are provided starting from the joint base 12.
  • Channels 20 and 21 are formed inside the welded annular portions 13 and 14, and the channels 20 and 21 communicate with the channel 15 formed in the joint base 12.
  • the welded annular portion 13 is formed in a long cylindrical shape and the welded annular portion 14 is formed in a short cylindrical shape, but the configuration of the joint 11 is not limited to this.
  • both of the welded annular portions 13 and 14 may be formed in a long cylindrical shape, and the welded annular portion appropriately selected at the time of use may be cut to a required length and shortened, or both of the welded annular portions 13 and 14 may be shortened. You may form in the cylinder shape.
  • the fixing portions 18 and 19 provided at the outer ends of the joint base 12 are circular, and the outer diameters 22 and 23 are formed to be the same as the outer diameters 24 and 25 of the welded annular portions 13 and 14.
  • the outer periphery of the protruding fixing portions 18 and 19 must be formed in a cylindrical shape so as to be securely clamped and held by the clamp of the welding machine, but the top portions 26 and 27 of the fixing portions 18 and 19 are flat surfaces. For example, as shown by a two-dot chain line 28 in the fixing portion 19 in FIG. That is, in this case, it is possible to save material and reduce weight.
  • the joint 11 in this embodiment is the same as the standard of conventional resin joints except that a fixing part is provided coaxially with the welded annular parts 12 and 13 at the outer end of the joint base, but is limited to this. is not.
  • the nominal diameter of the welded annular portions 12 and 13 is 25.4 mm (1 inch).
  • the fixing parts 18 and 19 need to have a sufficient height to be securely clamped and held by the clamp of the welding machine.
  • the fixing allowance that is the width of the clamp of the welding machine is in the range of 6 to 15 mm.
  • the joint can be securely clamped and held by the clamp, so that the protrusions that occur outside the joint base can be removed. Can be minimal. For this reason, since a fixing
  • the fixing portion is provided at the outer end of the joint base, the distance from the heater surface to the fixing portion is the distance from the heater surface to the clamp tightening gripping portion of the welded annular portion when welding a conventional joint. There is no large difference in distance and appropriate inter-core dimensions are ensured.
  • the fixed portion 18 of the joint 11 has an outer diameter that is coaxial with the central axis 16 of the welded annular portion 13 and the same as the outer diameter 24 of the welded annular portion 13 at the outer end of the joint base 12. Since the fixed portion 18 is clamped and held by the clamp of the welding machine, the positional relationship between the welding annular portion 13 and the welding machine is the case where the welding annular portion 13 is clamped and held by the clamp. The positional relationship between the welding annular portion 13 and the welding machine is the same.
  • the center axis of the workpiece is set to coincide with the axis of the welding machine.
  • the center axis 16 of the welded annular portion 13 whose center axis is coaxial with the fixed portion coincides with the axis of the welder.
  • the position of the bead of the welded part can be provided in the vicinity of the resin joint, and the bead can be used as a pipe support or a sensor. Contributes to compact piping without hindering installation.
  • the distances 35 and 36 between the central axes 31 and 32 of the fixing portions 18 and 19 and the outer periphery 33 and 34 of the fixing portion are as follows. It is constant. Accordingly, when the fixing portion 19 is clamped and held by the clamp and the workpiece is welded to the end portion 37 of the welded annular portion 14, the welded annular portion 13 is rotated around the central axis 17, and the end portion 38 of the welded annular portion 13 is moved. Regardless of the direction in which the fixing portion 19 is clamped and held by the clamp, the center axis 17 of the welding annular portion 14 that is coaxial with the fixing portion 19 coincides with the axis of the welding apparatus.
  • FIG. 4 shows a piping device 43 prepared by welding the resin joints 11 with the shortest inter-core dimension.
  • the inter-core dimension 44 can be shortened and formed, the piping of the apparatus can be made compact by using the piping device 43.
  • the welded annular portions 14 and 14 to be welded can be welded by perfectly aligning the axial centers of the welded portions 45, a step is generated in the welded portion 45 to inhibit the smooth flow of liquid, It is possible to easily create high-quality piping equipment that does not retain or desorb particles.
  • the application of the present invention is not limited to the elbow-type resin joint 11 of the present embodiment, and a plurality of welded annular portions communicating with the flow path in the joint base portion are provided at the joint base portion, and at least one of the welded annular portions is provided.
  • Any joint can be applied as long as it is coaxial with the welded annular part and has a fixing part for a welder clamp at the outer end of the joint base.
  • the present invention can be similarly applied to the tee joint 46 shown in FIG. 5 and the angle tee joint 47 shown in FIG. In the tee-shaped joint 46 of FIG. 5 and the angle tee-shaped joint 47 of FIG.
  • one of the annular welded portions 48 is formed in a short cylindrical shape, but as in the case of the elbow-shaped joint 11.
  • the welded annular part 48 may be formed into a long cylindrical shape, and the welded annular part 48 to be welded using the fixed part 49 at the time of use may be cut and shortened according to the required length. All of the welded annular portions 48 to be welded using 49 may be formed into a short cylindrical shape, and these are optional depending on the implementation.
  • a joint 11 in which a circular fixing part 19 is integrally formed so as to protrude coaxially with the welded annular part 14 provided on the joint base, and a work 50 to be welded to the joint 11 are prepared.
  • the fixing portion 19 of the joint 11 is clamped and fixed by the clamp 39 of the welding machine 41, and the workpiece 50 is clamped and clamped by the clamp 39 to fix the joint 11 and the workpiece 50. Is disposed to face the heater 42 of the welding machine 41.
  • the end face 37 to which the joint 11 is welded and the end face 51 to which the work 50 is welded are heated and melted in a non-contact state with the heater. After the end surfaces 37 and 51 to which the joint 11 and the workpiece 50 are welded are sufficiently heated and melted, both end surfaces are pressed and adhered.
  • the welding annular portion 14 is fixed in accordance with the axis of the welding machine 41. Therefore, it is not necessary to perform shaft alignment, which is a troublesome operation that has conventionally required a long time, and the welding operation of the joint can be performed accurately in a short time.
  • the substantial difference between the case where the end face butt resin joint according to the present invention is welded by the welding method according to the present invention and the case where the conventional resin joint is welded by the conventional welding method is the fixed portion of the end face butt resin joint according to the present invention. Is clamped and clamped with a clamp and fixed to the welding machine, and the other processes are not different from the case of welding a conventional resin joint by a conventional welding method. Therefore, if it is an operator who is familiar with the conventional welding method, it is possible to perform the welding work using a conventional welding machine and clamp rather easily and surely without performing any work training. Its economic value is extremely high.
  • the joint welding method described above is not limited to the welding of the end face butt joint and the specific workpiece in the present invention, and can be applied to welding with various workpieces as described below.
  • the joint 52 having the short tubular welded annular portion and the elbow joint 53 clamps the fixing portion 54 as shown in FIG.
  • the elbow joint 53 is clamped and gripped by a clamp 55 with a long cylindrical annular welded portion 56 and is disposed opposite to both sides of the heater 57, and the respective end faces are heated and melted for welding. Can do.
  • a joint 58 having a short cylindrical welded annular portion and a tubular portion (hereinafter simply referred to as a “tube”) 59 such as a tube or a pipe, as shown in FIG.
  • the joint 58 having the welded annular portion is clamped and held by the clamp 55 with the fixing portion 54, and the tube 59 is clamped and held at an appropriate position by the clamp 55, and is disposed opposite to both sides of the heater 57. Can be heated and melted for welding.
  • the joint 52 having a short tubular welded annular portion has a fixed portion 54 as shown in FIG.
  • the valve 60 can be clamped and clamped by the clamp 55, and the tube 61 can be clamped and clamped by the clamp 55 and arranged opposite to both sides of the heater 57, and the respective end faces can be heated and melted for welding.
  • the joint 52 having a short cylindrical welded annular portion and the tube 63 of the mechanical joint 62 are welded, the joint 52 having a short tubular welded annular portion is fixed to a fixed portion 54 as shown in FIG.
  • the mechanical joint 62 can clamp and hold the tube 63 with the clamp 55, and is disposed opposite to both sides of the heater 57, and heats and melts the respective end faces for welding.
  • the resin end face butt joint and welding method in the present invention are not limited to welding between joints, but various pipes in which joints and tubes, joints and mechanical joints, joints and valves, various sensors or filters, etc. are welded. Equipment can be created. By selecting and using them appropriately, it is possible to eliminate unnecessary welded annular parts of the joint and configure the pipes with only the parts that are truly necessary. can do.
  • the fixing portion 65 of the joint 64 can be clamped and held by the clamp 66 and the sleeve 69 can be press-fitted. Further, the fixing portion 65 can be pressed and fixed to a flat contact surface 68 such as a dedicated sleeve jig 67, and the joint 64 does not move stably even if a force is applied when the sleeve 69 is press-fitted. Thus, the sleeve 69 can be press-fitted into the welded annular portion 70, and workability can be improved.
  • reference numeral 71 denotes a union nut.
  • the welding operation is performed more efficiently and accurately than when the conventional resin joint is welded by the conventional welding method.
  • it is not necessary to newly become proficient in the work, and since the welding work can be performed using the conventional welding machine and clamp, there is no economic burden, so that the industrial The utility value and economic value are extremely high.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

　短筒形状の溶着環状部を有する継手を溶着する場合であっても、通常の溶着機のクランプで固定代と適正な芯間寸法を確保し、同時に同軸上に位置させて芯合わせも行うことを可能とした樹脂製端面突合せ継手とその継手の溶着方法、並びに配管器材を提供することである。その課題を解決するための手段は、継手基部（１２）に継手基部内の流路（１５）と連通する複数の溶着環状部（１３，１４）を設け、この溶着環状部の少なくとも一つの溶着環状部の同軸上で、かつ前記継手基部の外端に溶着機クランプ用の固定部（１８，１９）を設けた樹脂製端面突合せ継手である。

Description

樹脂製端面突合せ継手とその継手の溶着方法並びに配管器材
　本発明は、半導体産業、食品産業、薬品産業、バイオテック産業、化学産業等で用いられる樹脂製端面突合せ継手とその継手の溶着方法並びに配管器材に関する。
　半導体産業、食品産業、薬品産業、バイオテック産業、化学産業等の分野などで使用される配管素材には、耐薬品性、耐熱性、高いクリーン度などが要求される。これらの要求を満たす配管素材としては、例えば、ＰＦＡ（パーフルオロアルコキシエチレン共重合樹脂）などのフッ素樹脂が適している。
　このような産業分野における製造ラインの配管は、ＰＦＡ樹脂からなる熱可塑性樹脂製の継手同士又は当該継手とチューブ等を端面突合せ溶着して構成される場合がある。
　熱可塑性樹脂製の継手やチューブ等（以下、ワークという。）の管端面同士を突合せ溶着をする場合、非接触の状態でヒータの両側に双方のワークの管端面を同軸上に位置決めし、ヒータの熱で加熱して適切な溶融状態になったときに双方の管端面同士を押し付け、溶着する方法がある。
　この方法によりワークの管端面同士を溶着する装置として、特許文献１の溶着機が知られている。この溶着機１は、図９に示すように、ヒータ２の両側に非接触状態で溶着する一対のワーク３、３を配し、それらの管端面４、４を加熱して溶融させるが、加熱及び溶融時にワーク３、３の管端面４、４をヒータ２に接触させることなく適正な距離で固定するために、また、ワーク３、３の管端面４、４が適正な溶融状態になった後に少なくとも一方の管端面を同軸上で移動させ、両ワーク３、３の管端面４、４を押し付けて溶着するために、ヒータ２の両側に一対のクランプ５、５を設け、そのクランプ５、５によりワーク３、３を締付把持している。
　また、特許文献２には、この様な溶着装置を用いてワーク同士を有害な内面ビードを防止して溶着する溶着方法が紹介されている。
特開平８－１５６１０２号公報 特開２００４－２１６８５９号公報
　上記の特許文献１の溶着機及び特許文献２の溶着方法では、樹脂継手の溶着環状部が短寸で短筒形状である場合、溶着環状部にクランプで締付固定するための固定代を十分に取ることができないので、クランプで溶着環状部を締付固定することができず、樹脂継手自体を特殊な固定用治具を使用して溶着機に固定する必要があった。　
　しかしながら、当該樹脂継手を特殊な固定用治具を使用して溶着機に固定することは、施工作業が面倒であるばかりでなく、継手同士の管端面の軸芯を合わせるために多大の時間を要し、また継手同士の溶着部に位置ズレも生じるおそれがあるため、これらの課題を解決し、管端面を高精度に加熱溶融して溶着することができる樹脂製継手の提案が切望されていた。
　本発明は、上記の課題点を解決するために開発したものであり、その目的とするところは、短筒形状の溶着環状部を有する継手を溶着する場合であっても、通常の溶着機のクランプで固定代と適正な芯間寸法を確保し、同時に同軸上に位置させて芯合わせも行うことを可能とした樹脂製端面突合せ継手とその継手の溶着方法、並びに配管器材を提供することにある。
　上記目的を達成するため、請求項１に係る発明は、継手基部に継手基部内の流路と連通する複数の溶着環状部を設け、この溶着環状部の少なくとも一つの溶着環状部の同軸上で、かつ前記継手基部の外端に溶着機クランプ用の固定部を設けたことを特徴とする樹脂製端面突合せ継手である。
　請求項２に係る発明は、溶着環状部を短筒形状に形成し、この溶着環状部の同軸上に形成した固定部を溶着環状部の外径と同一外径の円形とした樹脂製端面突合せ継手である。
　請求項３に係る発明は、継手基部に設けた溶着環状部をエルボ形状又はティ形状、或いはアングルティ形状の何れか一つとした樹脂製端面突合せ継手である。
　請求項４に係る発明は、継手基部に設けた溶着環状部の同軸上で、かつ前記継手基部の外端に円形固定部を一体に突出形成し、この固定部を溶着機のクランプで把持固定し、前記溶着環状部の端面同士を非接触のヒータで加熱溶融させた後に、前記溶着環状部同士を押付けることにより管端面同士を溶着することを特徴とする樹脂製端面突合せ継手の溶着方法である。
　請求項５に係る発明は、溶着環状部を短筒形状に形成した継手同士の前記固定部をクランプで把持固定し、その後、短筒形状の溶着環状部を溶着して最短の芯間寸法を有する最短溶着である樹脂製端面突合せ継手の溶着方法である。
　請求項６に係る発明は、固定部をクランプで把持固定した短筒形状の溶着環状部の端面と、チューブの端面又はメカニカル継手の管端面、或いはバルブや圧力、流量等のセンサー類又はフィルタなどの接続端面の何れかのワーク同士を溶着した樹脂製端面突合せ継手の溶着方法である。
　請求項７に係る発明は、継手基部に継手基部内の流路と連通する複数の溶着環状部を設け、この溶着環状部の少なくとも一つの溶着環状部の同軸上で、かつ前記継手基部の外端に溶着機クランプ用の固定部を設けたことを特徴とする樹脂製端面突合せ継手を、前記固定部をクランプで締付把持することにより溶着機に固定する溶着方法により構成した配管器材である。
　請求項１に係る発明によると、固定用治具を使用することなく、通常の溶着機のクランプで同軸上に、かつ適正な芯間寸法で締付固定できるため、短筒形状の溶着環状部を有する各種の熱可塑性樹脂等の継手を確実に、かつ容易に溶着でき、特に、継手同士の最短溶着が可能となり、もって装置自体の小型化に対応でき、かつ配管スペースの縮小化とコンパクト化に著しく寄与できる。　
　請求項２に係る発明によると、固定部を溶着環状部の外径と同一の外径の円形としたから、特別の治具を要することなく、通常の溶着機のクランプにより同軸上で締付固定でき、しかも、固定幅分の長さである固定代を十分に確保できるため、施工性と作業性が著しく良好である。
　請求項３に係る発明によると、エルボ、ティ又はアングルティ形状など各種の継手に適用することが可能である。
　請求項４に係る発明によると、溶着環状部が短筒形状で固定幅分の長さを確保できない寸法であっても、通常の溶着機のクランプで容易に締付固定できると共に、適正な芯間寸法で固定可能となり、しかも同軸上に確実に保持でき、容易に芯合わせも可能となり、位置ズレのおそれもないなどの有用な溶着方法を提供できる。
　請求項５に係る発明によると、短筒形状の溶着環状部を有する継手同士を確実に溶着できるため、最短の芯間寸法を有する継手部材を容易に構成できるため、コンパクト化に著しく寄与する。
　請求項６に係る発明によると、短筒状の溶着環状部を有する継手の固定部を締付固定した状態で、継手同士のみならず、継手とチューブやメカニカル継手、或いはバルブなどのワークを確実に溶着することができる。
　請求項７に係る発明によると、継手同士、継手とチューブ、継手とメカニカル継手、或いは継手とバルブなどのワークを溶着した配管器材を提供することができるため、例えば、薬液提供装置などの小型化に対応でき、配管スペースの縮小化にも容易に対応可能となり、もって、著しくコンパクト化に寄与できると共に、安定的な溶着作業を遂行することができる。
本発明における樹脂製端面突合せ継手のエルボ形状の継手を示した斜視図である。 図１の断面図である。 図１の継手同士を最短溶着する状態を示す正面説明図である。 図３に示した継手同士を溶着した配管器材の拡大正面図である。 本発明における樹脂製端面突合せ継手のティ形状の継手を示した斜視図である。 本発明における樹脂製端面突合せ継手のアングルティ形状の継手を示した斜視図である。 （ａ）は、短筒形状の溶着環状部を有する継手とエルボ継手を溶着する状態を示す説明図である。（ｂ）は、短筒形状の溶着環状部を有する継手とチューブを溶着する状態を示す説明図である。（ｃ）は、短筒形状の溶着環状部を有する継手とバルブのパイプを溶着する状態を示す説明図である。（ｄ）は、短筒形状の溶着環状部を有する継手とメカニカル継手のパイプを溶着する状態を示す説明図である。 本発明における継手の固定部を専用スリーブ圧入治具に締付把持して、スリーブを圧入施工する状態を示す説明図である。 従来の樹脂製継手同士を溶着する際に、クランプで締付把持する状態を示す図である。
　以下に、本発明における樹脂製端面突合せ継手の実施形態を図面に基づいて詳細に説明する。図１、２においては、本発明における樹脂製端面突合せ継手のエルボ形状の継手を示しており、図１に当該継手を斜め上方より見た斜視図、図２に当該継手の断面図をそれぞれ示している。
　樹脂継手は熱可塑性樹脂を材料とするが、熱可塑性樹脂にはＰＦＡ、ＰＴＦＥ、ＦＥＰ、ＥＴＦＥ、ＰＶＤＦ、ＰＶＦ、ＰＣＴＦＥ、ＥＣＴＦＥなどのフッ素樹脂、又は塩化ビニリデン、塩化ビニル、酢酸ビニル、ポリビニルアルコール、スチロール、ＡＢＳ、ポリカーポネート、ポリエチレン、超高分子ポリエチレン、ポリプロピレン、アクリル、ブチレート、アセテート、ポリアミド、ポリアセタール、ＡＳ、フッ化ビニリデン等がある。本発明における樹脂製端面突合せ継手は、ＰＦＡを用いている。
　図１において、樹脂製端面突合せ継手のエルボ形状の継手１１は、内部に流路１５を有する継手基部１２とワークを溶着する溶着環状部１３と端筒形状の溶着環状部１４とから構成されている。
　継手基部１２の外端に、溶着環状部１３、１４の中心軸１６、１７と同軸に、溶着機のクランプで締付把持するための固定部１８、１９がそれぞれ突設されている。
　溶着環状部１３、１４は継手基部１２を起点として設けられている。溶着環状部１３、１４の内部には流路２０、２１が形成されており、流路２０、２１は継手基部１２内に形成されている流路１５と連通している。
　図では、溶着環状部１３は長筒形状に、溶着環状部１４は短筒形状に形成されているが、継手１１の構成はこれに限定されるわけでない。例えば、溶着環状部１３、１４ともに長筒形状に形成しておき、使用時に適宜選択した溶着環状部を所要の長さに切断して短縮してもよいし、溶着環状部１３、１４ともに短筒形状に形成しておいてもよい。
　継手基部１２の外端に設けられた固定部１８、１９は円形で、かつ、その外径２２、２３は、溶着環状部１３、１４の外径２４、２５と同一に形成されている。突設された固定部１８、１９の外周は、溶着機のクランプで確実に締付把持するため、円柱形に形成する必要があるが、固定部１８、１９の頂部２６、２７は平坦な面に形成する必要はなく、例えば図２における固定部１９に二点鎖線２８で示すように、凹みが存在しても構わない。すなわち、この場合は、材料の節約、重量軽減を図ることが可能となる。
　本実施例における継手１１も継手基部の外端に、溶着環状部１２、１３と同軸に固定部を設けたことを除き、従来の樹脂継手の規格と同一であるが、これに限定されるものではない。なお、本実施例では、溶着環状部１２、１３の呼び径を２５．４ｍｍ（１インチ）とした。
　固定部１８、１９は、溶着機のクランプで確実に締付把持するために十分な高さを有している必要がある。一般に溶着機のクランプの幅である固定代は６～１５ｍｍの範囲にあるが、固定部１８、１９の高さ２９、３０をクランプの幅に等しく設定する必要はなく、クランプで固定部を締結把持した際に、継手をぐらつくことなく確実に固定できる分の高さがあれば足りる。
　上記のように、固定部の高さは、継手全体の大きさに比して十分小さく設定してもクランプにより継手を確実に締付把持することができるので、継手基部の外部に生じる突起を最小限とすることができる。このため、固定部が他のワークと干渉することがないので、配管をコンパクトに構成することができる。
　また、固定部は継手基部の外端に設けられているため、ヒータ面からの固定部までの距離は、従来の継手を溶着する場合におけるヒータ面から溶着環状部のクランプ締付把持部までの距離と大差がなく、適正な芯間寸法を確保している。
　固定部１８、１９の外径２２、２３は、溶着環状部１３、１４の外径２４、２５と同一に形成されているため、溶着環状部１３、１４を締付把持することができるクランプをそのまま使用することができるので、本発明における樹脂製端面突合せ継手を使用するに際し、従来のクランプとサイズが異なるクランプを新たに準備する必要がない。
　図２に示すように、継手１１の固定部１８は、継手基部１２の外端に、溶着環状部１３の中心軸１６と同軸に、かつ溶着環状部１３の外径２４と同一の外径を有する円形で突設されているため、固定部１８を溶着機のクランプで締付把持した場合の溶着環状部１３と溶着機との位置関係は、溶着環状部１３をクランプで締付把持した場合の溶着環状部１３と溶着機との位置関係と同じになる。
　溶着機では、溶着するワークをクランプで締付把持すると、そのワークの中心軸は溶着機の軸芯と一致するように設定されているので、継手１１の固定部１８をクランプで締付把持すると、当該固定部と中心軸が同軸である溶着環状部１３の中心軸１６は、溶着機の軸芯と一致する。
　上記の関係は、継手１１のもう一方の溶着環状部１４の中心軸１７と同軸に、継手基部１２の外端に形成されている固定部１９についても成立する。
　従って、短筒形状に形成されているためにクランプの固定代分を確保できない溶着環状部１４をワークに溶着する場合であっても、単に、固定部１９をクランプで締付把持するだけで、溶着環状部１４の中心軸１７を軸芯に合わせて溶着機に取付けることができるので、作業性が著しく向上する。
　また、溶着環状部１４のように短筒形状に形成した溶着環状部にワークを溶着すると、溶着部のビードの位置を樹脂継手の近傍に設けることができ、該ビードが配管サポートやセンサー等の取付けの妨げになることなく、配管のコンパクト化に寄与する。
　また、固定部１８、１９が円形に形成されているため、図１に示すように、固定部１８、１９の中心軸３１、３２と固定部の外周３３、３４間との距離３５、３６は一定である。従って、固定部１９をクランプで締付把持し、ワークを溶着環状部１４の端部３７に溶着する場合、溶着環状部１３を中心軸１７周りに回転させ、溶着環状部１３の端部３８をどの方向に向けて固定部１９をクランプで締付把持した場合であっても、固定部１９と同軸である溶着環状部１４の中心軸１７は、溶着装置の軸芯と一致する。
　従って、溶着するワークに対し、溶着環状部１４の中心軸周りに樹脂継手１１を適宜な角度分回転させても、被溶着ワークの中心軸と樹脂継手１１の溶着環状部１４の中心軸は一致するため、溶着部に食い違いが生じることがない。このため、被溶着ワークに対し、樹脂継手１１を溶着する角度に制限を受けることがなく、随意な回転角度で溶着することができるので、使用する配管長を最短としてコンパクトに配管を構成することができると共に、自由な方向性の継手を任意に溶着できる。
　図３及び図４において、２個の樹脂継手１１を短筒形状に形成された溶着環状部１４同士により溶着すると、最短の芯間寸法で樹脂継手１１同士を溶着することができる。この場合には、樹脂継手１１の溶着環状部１４をクランプで締付把持することができないので、図３に示すように、樹脂継手１１、１１固定部１９、１９の外周３４をクランプ３９の把持面４０で締付把持することにより、溶着機４１のヒータ４２の両側にヒータ４２とは非接触状態で、溶着環状部１４、１４の端部３７、３７を対向させて固定することができる。この時、一対の樹脂継手１１、１１の溶着環状部１４、１４の軸芯は、単にクランプ３９、３９で樹脂継手１１、１１の固定部１９、１９を締付把持するだけで前述したように一致する。　
　図４に示すのが、最短の芯間寸法で樹脂継手１１同士を溶着して作成した配管器材４３である。このように、芯間寸法４４を短くして形成することができるので、配管器材４３を使用することにより、装置の配管をコンパクトに構成することができる。
　また、溶着する溶着環状部１４、１４同士の軸芯を完全に合わせて溶着することができるので、溶着部４５に段差が生じて液体のスムーズな流れを阻害したり、液だまりが生じたり、パーティクルが滞留、脱離することがない高品質発生な配管器材を簡単に作成することができる。
　本件発明の適用は、本実施例のエルボ型樹脂継手１１に限られることはなく、継手基部に継手基部内の流路と連通する複数の溶着環状部を設け、この溶着環状部の少なくとも一つの溶着環状部の同軸上で、かつ前記継手基部の外端に溶着機クランプ用の固定部を設けた継手であれば適用することができる。例えば、図５に示すティ形状の継手４６、図６に示すアングルティ形状の継手４７においても、同様に適用できることは勿論である。
　図５のティ形状の継手４６、及び図６のアングルティ形状に継手４７では、環状溶着部４８のうちの一つが短筒形状に形成されているが、エルボ形状の継手１１の場合と同様に、全ての溶着環状部４８を長筒形状に成形しておき、使用時に固定部４９を使用して溶着する溶着環状部４８を所要の長さに合わせて切断短縮してもよいし、固定部４９を使用して溶着する溶着環状部４８の全てを短筒形状に形成してもよく、これらは実施に応じて任意である。
　次に、本発明における端面突合せ継手の溶着方法の一例を説明する。
　先ず、継手基部１２の外端に、前記継手基部に設けた溶着環状部１４と同軸に円形固定部１９を一体に突出形成した継手１１、及びこの継手１１と溶着するワーク５０を準備し、図３に示すように、前記継手１１の固定部１９を溶着機４１のクランプ３９で締付把持して固定すると共に、前記ワーク５０をクランプ３９で締付把持して固定し、継手１１とワーク５０を溶着機４１のヒータ４２に対向させて配置する。
　前記継手１１の溶着する端面３７及び前記ワーク５０の溶着する端面５１をヒータとは非接触状態で加熱し、溶融させる。継手１１とワーク５０の溶着する端面３７、５１が十分に加熱溶融された後、両端面同士を押付けて容着させる。
　本発明における端面突合せ継手の溶着方法では、継手１１の溶着環状部１４にクランプ３９により締付把持する固定代を確保できない場合であっても、従来の溶着方法のように継手自体を締付把持するための専用治具を準備する必要がなく、従来のクランプ３９で溶着する溶着環状部１４の同軸上に、継手基部１２に外設された固定部１９を締付把持することにより継手１１を溶着機４１に固定することができるので、作業効率が著しく向上する。
　また、溶着する溶着環状部１４の同軸上に、継手基部１２の外端に設けた固定部１９をクランプ３９で締付把持すると、溶着環状部１４を溶着機４１の軸芯に合わせて固定することができるため、従来、長時間を要した面倒な作業である軸芯合わせを行う必要がなく、短時間で正確に継手の溶着作業を行うことができる。
　本発明における端面突合せ樹脂継手を本発明における溶着方法により溶着する場合と、従来の樹脂継手を従来の溶着方法により溶着する場合との実質的な違いは、本発明における端面突合せ樹脂継手の固定部をクランプで締付把持して溶着機に固定する工程のみであり、他の工程は従来の樹脂継手を従来の溶着方法により溶着する場合と何ら変わることがない。従って、従来の溶着方法に習熟している作業者であれば、何らの作業訓練を行うことなく、むしろより簡単かつ確実に従来の溶着機及びクランプを用いて溶着作業を行うことができるので、その経済的価値は極めて大きい。
　以上説明した継手の溶着方法は、本発明における端面突合せ継手と特定のワークとの溶着に限られることなく、次に説明する様に、種々のワークと溶着する場合に適用することができる。
　短筒形状の溶着環状部を有する継手５２とエルボ継手５３を溶着する場合には、図７（ａ）に示すように、短筒形状の溶着環状部を有する継手５２は固定部５４をクランプ５５で締付把持し、またエルボ継手５３は長筒形状の溶着環状部５６をクランプ５５で締付把持して、ヒータ５７の両側に対向配置し、それぞれの端面を加熱、溶融させて溶着することができる。
　短筒形状の溶着環状部を有する継手５８とチューブやパイプ等の管状部（以下、単に「チューブ」という。）５９を溶着する場合には、図７（ｂ）に示すように、短筒形状の溶着環状部を有する継手５８は固定部５４をクランプ５５で締付把持し、またエチューブ５９は適宜な位置をクランプ５５で締付把持して、ヒータ５７の両側に対向配置し、それぞれの端面を加熱、溶融させて溶着することができる。
　短筒形状の溶着環状部を有する継手５２とバルブ６０のチューブ６１を溶着する場合には、図７（ｃ）に示すように、短筒形状の溶着環状部を有する継手５２は固定部５４をクランプ５５で締付把持し、またバルブ６０はチューブ６１をクランプ５５で締付把持して、ヒータ５７の両側に対向配置し、それぞれの端面を加熱、溶融させて溶着することができる。
　短筒形状の溶着環状部を有する継手５２とメカニカル継手６２のチューブ６３を溶着する場合には、図７（ｄ）に示すように、短筒形状の溶着環状部を有する継手５２は固定部５４をクランプ５５で締付把持し、またメカニカル継手６２はチューブ６３をクランプ５５で締付把持して、ヒータ５７の両側に対向配置し、それぞれの端面を加熱、溶融させて溶着することができる。
　本発明における樹脂製端面突合せ継手と溶着方法は、継手同士の溶着に限定されることなく、継手とチューブ、継手とメカニカル継手、或いは継手とバルブや各種センサー類又はフィルタなどを溶着した種々の配管器材を作成することができる。それらを適宜選択して使用することにより、継手の不要な溶着環状部等を排除し、真に必要な部分のみによって配管を構成することができるので、例えば、薬液提供装置などの配管を小型化することができる。
　また、図８に示すように、本発明における継手６４の固定部６５の本例と異なった用い方がある。すなわち、固定部６５をクランプ６６で締付把持してスリーブ６９を圧入することができる。また、固定部６５を専用スリーブ治具６７のような平坦な当接面６８に押圧固定することも可能であり、スリーブ６９圧入時に力が加わっても継手６４が安定して動かないため、容易にスリーブ６９を溶着環状部７０へ圧入することができ作業性が向上できる。なお、図中７１はユニオンナットである。
　以上説明したように、本発明における樹脂継手を本発明における溶着方法により溶着する場合には、従来の樹脂継手を従来の溶着方法で溶着する場合に比べ、効率的に、かつ正確に溶着作業を実施することができだけでなく、新たに作業に習熟する必要がなく、従来の溶着機及びクランプを用いて溶着作業を行うことができるために経済的な負担を生じないので、その産業上の利用価値及び経済的価値は極めて大きい。
　１１　エルボ形状の継手
　１２　継手基部
　１３、１４、４９、６９　溶着環状部
　１８、１９、５４、６５　固定部
　３９　クランプ
　４１　溶着機
　４２　ヒータ
　４３　配管器材
　４６、６４　ティ形状の継手
　４８　アングルティ形状の継手

Claims (7)

  1. 　継手基部に継手基部内の流路と連通する複数の溶着環状部を設け、この溶着環状部の少なくとも一つの溶着環状部の同軸上で、かつ前記継手基部の外端に溶着機クランプ用の固定部を設けたことを特徴とする樹脂製端面突合せ継手。
  2. 　前記溶着環状部を短筒形状に形成し、この溶着環状部の同軸上に形成した固定部を溶着環状部の外径と同一外径の円形とした請求項１に記載の樹脂製端面突合せ継手。
  3. 　前記継手基部に設けた溶着環状部をエルボ形状又はティ形状、或いはアングルティ形状の何れか一つとした請求項１又は２に記載の樹脂製端面突合せ継手。
  4. 　継手基部に設けた溶着環状部の同軸上で、かつ前記継手基部の外端に円形固定部を一体に突出形成し、この固定部を溶着機のクランプで把持固定し、前記溶着環状部の端面同士を非接触のヒータで加熱溶融させた後に、前記溶着環状部同士を押付けることにより管端面同士を溶着することを特徴とする樹脂製端面突合せ継手の溶着方法。
  5. 　前記溶着環状部を短筒形状に形成した継手同士の前記固定部をクランプで把持固定し、その後、短筒形状の溶着環状部を溶着して最短の芯間寸法を有する最短溶着である請求項４に記載の樹脂製端面突合せ継手の溶着方法。
  6. 　前記固定部をクランプで把持固定した短筒形状の溶着環状部の端面と、チューブの端面又はメカニカル継手の管端面、或いはバルブや圧力、流量等のセンサー類又はフィルタなどの接続端面の何れかのワーク同士を溶着した請求項４又は５に記載の樹脂製端面突合せ継手の溶着方法。
  7. 　前記請求項１乃至６の何れか１項に記載の継手を溶着することによって構成した配管器材。
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US20130220471A1 (en) * 2009-07-09 2013-08-29 Frank F. Hayes, Jr. As-molded plastic unit cell structures and welded fluid flow assemblies of the unit cell structures
US20140069548A1 (en) * 2011-11-11 2014-03-13 Takashi Hasegawa Resin end-face butt joint, method for welding the joints, and piping member

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US20140069548A1 (en) 2014-03-13
CN103562612A (zh) 2014-02-05
JP2013103363A (ja) 2013-05-30
US9982807B2 (en) 2018-05-29
TW201319438A (zh) 2013-05-16
KR20140088046A (ko) 2014-07-09
JP5710450B2 (ja) 2015-04-30

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