WO2017038330A1 - 超音波シールアンビル - Google Patents

超音波シールアンビル Download PDF

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Publication number
WO2017038330A1
WO2017038330A1 PCT/JP2016/072219 JP2016072219W WO2017038330A1 WO 2017038330 A1 WO2017038330 A1 WO 2017038330A1 JP 2016072219 W JP2016072219 W JP 2016072219W WO 2017038330 A1 WO2017038330 A1 WO 2017038330A1
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WO
WIPO (PCT)
Prior art keywords
groove
overlapping portion
anvil
sealing
overlapping
Prior art date
Application number
PCT/JP2016/072219
Other languages
English (en)
French (fr)
Inventor
柚原　徳崇
洋 秋葉
康彦 木村
準一 山本
Original Assignee
凸版印刷株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 凸版印刷株式会社 filed Critical 凸版印刷株式会社
Priority to JP2017537668A priority Critical patent/JP6822406B2/ja
Priority to CN201680050156.8A priority patent/CN107922070B/zh
Publication of WO2017038330A1 publication Critical patent/WO2017038330A1/ja
Priority to US15/906,097 priority patent/US10279542B2/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7451—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • 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
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/346—Making joints having variable thicknesses in the joint area, e.g. by using jaws having an adapted configuration
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72327—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • 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
    • B29C66/737—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 state of the material of the parts to be joined
    • B29C66/7373—Joining soiled or oxidised materials
    • 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
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • 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
    • 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
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • B29C66/8491—Packaging machines welding through a filled container, e.g. tube or bag
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/04—Applying separate sealing or securing members, e.g. clips
    • B65B51/06—Applying adhesive tape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/22—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/22—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding
    • B65B51/225—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding by ultrasonic welding
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B29C66/81419—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled and flat
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7162—Boxes, cartons, cases
    • B29L2031/7166—Cartons of the fruit juice or milk type, i.e. containers of polygonal cross sections formed by folding blanks into a tubular body with end-closing or contents-supporting elements, e.g. gable type containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles

Definitions

  • the present invention relates to an ultrasonic seal anvil of an ultrasonic seal device for sealing packaging materials.
  • the packaging material after storing the liquid is formed into various three-dimensional shapes such as a triangular pyramid, a quadrangular prism, and a cylindrical shape.
  • the packaging material after molding is referred to as “package”.
  • packages for example, when manufacturing a substantially quadrangular prism package, first, the long packaging material is overlapped at both ends along the longitudinal direction and bonded to form a cylinder. Next, the cylindrical packaging material is sealed at the upper end after the lower end of the cylinder is sealed and filled with contents. The packaging material sealed at both ends is pressed into a three-dimensional quadrangular prism.
  • the sealing of the packaging material is hereinafter referred to as “seal”.
  • ultrasonic sealing As a technique for sealing the packaging material, there is an ultrasonic seal.
  • a sealed portion of a packaging material is sandwiched and pressed between a resonator called a horn and a receiving jig called an anvil.
  • vibration energy is given to the seal portion through a horn simultaneously with pressurization, and the thermoplastic resin on the inner surface of the packaging material is melted to fuse the packaging materials.
  • the packaging material whose both ends are sealed is pressed into a three-dimensional square pillar.
  • a portion where both ends of the packaging material are overlapped is generated.
  • a portion where the packaging materials overlap is hereinafter referred to as an “overlapping portion”.
  • the overlapping portion will be thicker than the other seal portions and will be subject to high pressure by the horn and anvil.
  • a recess is provided in the anvil in accordance with the position of the overlapping portion.
  • ultrasonic seals tend to increase in speed, and currently 100 to 400 packages are manufactured per minute.
  • the speed of the ultrasonic sealing process is increased, the alignment accuracy between the concave portion of the anvil and the seal portion is lowered, and the position of the overlapping portion with respect to the anvil is displaced.
  • an excessive pressure is applied to the overlapping portion to cause a seal failure, and the contents may leak.
  • Reference 2 discloses an ultrasonic sealing device that forms a continuous groove at a position sandwiching the seal portion of the anvil in order to prevent leakage of the contents due to misalignment of the overlapping portion. According to such an ultrasonic sealing device, even when the overlapping portion is displaced with respect to the anvil, the convex portion of the groove presses the overlapping portion discontinuously.
  • the configuration in which pressure is applied discontinuously to the overlapped part relieves pressure on the overlapped part regardless of whether or not there is a position shift, and even if there is no position shift, the optimum pressure is applied to the overlapped part. There is a fear that you can not. Further, in such a configuration, since the overlapping portion is pressed discontinuously, the area of the anvil contacting the overlapping portion is small and a relatively strong pressure is required for the seal. For this reason, there is a risk that the packaging material may be damaged by pressurizing the groove of the anvil with a strong force, the appearance may be damaged, and further, the contents may leak.
  • An object of the present invention is to provide an ultrasonic seal anvil capable of preventing pressure from being applied.
  • an ultrasonic seal anvil is an ultrasonic seal anvil that seals a packaging material having an overlapping portion extending in one direction along a sealing direction across the overlapping portion. And it has a level difference part which can contact the above-mentioned overlap part, and a groove part each arranged in the both sides of the level difference part in the above-mentioned sealing direction, It is characterized by the above-mentioned.
  • an optimum pressure is applied to an overlapping portion when no displacement occurs between the overlapping portion and the anvil, and an excessive pressure is prevented from being applied even when a displacement occurs.
  • An ultrasonic seal anvil can be provided.
  • FIG. 1 It is a schematic diagram for demonstrating the ultrasonic sealing apparatus of embodiment of this invention. It is a figure for demonstrating the packaging material processed with the ultrasonic sealing apparatus shown in FIG. It is a figure for demonstrating the cylindrical material shape
  • an ultrasonic seal anvil (hereinafter, also simply referred to as “anvil”) according to the present embodiment will be described with reference to an example of manufacturing a package having a substantially quadrangular prism appearance and filled with liquid.
  • the package which this embodiment illustrates is a thing which preserve
  • FIG. 1 is a schematic diagram for explaining an ultrasonic sealing device to which the anvil of this embodiment is applied.
  • the illustrated ultrasonic sealing device includes an ultrasonic oscillator 1, a converter 3, a horn 5, and an anvil 7. Between the horn 5 and the anvil 7, a cylindrical material 9 which is a cylindrical packaging material is sandwiched. Further, as necessary, the positional relationship between the horn 5 and the anvil 7 is determined by the three-dimensional coordinates of the X axis, the Y axis, and the Z axis shown in FIG.
  • the ultrasonic oscillator 1 supplies power to the converter 3 that is an ultrasonic vibrator.
  • the electric power supplied by the ultrasonic oscillator 1 is converted into mechanical vibration by the converter 3 and then supplied to the horn 5.
  • the horn 5 sandwiches the tubular material 9 together with the anvil 7, pressurizes the tubular material 9 and applies vibrations to seal the tubular material 9 in the X-axis direction in FIG.
  • the direction in which the cylindrical material 9 is sealed (X-axis direction in FIG. 1) is referred to as “sealing direction”, and the entire sealed portion of the cylindrical material 9 is hereinafter referred to as “sealing portion”.
  • FIG. 2 is a diagram for explaining a packaging material 19 that is a material of the cylindrical material 9.
  • the packaging material 19 has a multilayer structure of resin or paper.
  • the surface facing the inside of the package filled with the contents is referred to as “inner surface”, and the surface facing the package surface is referred to as “surface”.
  • the packaging material 19 is formed by laminating layers of a first polyethylene (PolyEthylene: hereinafter referred to as PE) resin 191, a barrier material 192, a second PE resin 193, paper 194, and a third PE resin 195 in order from the inner surface side. Is formed.
  • PE polyethylene
  • the first PE resin 191 is a thermoplastic resin and serves as an adhesive when the inner surfaces of the packaging material 19 are welded together.
  • the barrier material 192 include polyethylene terephthalate (PET), aluminum, and the like, which have a vapor deposition film layer and have barrier properties.
  • FIGS. 3A, 3 ⁇ / b> B, and 3 ⁇ / b> C are diagrams for explaining the tubular material 9.
  • the tubular material 9 is formed by overlapping end portions 91 a and 91 b along the longitudinal direction of the long packaging material 19.
  • the cylindrical material 9 is also a long member.
  • FIG. 3B is a cross-sectional view of the tubular material 9 taken along the line II shown in FIG.
  • a region where the end 91a and the end 91b overlap is referred to as an overlapping portion R.
  • the overlapping portion R extends along the longitudinal direction of the long cylindrical material 9.
  • the edge protection tape 31 is attached to the end portion 91a of the overlapping portion R.
  • the edge protection tape 31 has the end portion 91 a attached to the inner surface of the packaging material 19 to form the packaging material 19 into the cylindrical material 9.
  • FIGS. 4A and 4B are enlarged views of a portion P indicated by a broken line in FIG. 1, and FIG. 4 (a) is a cross-sectional view along the sealing direction of the anvil 7, FIG. 4B is a top view of the anvil 7 corresponding to FIG.
  • the anvil 7 seals the cylindrical material 9 in a direction (sealing direction) across the overlapping portion R.
  • the sealing direction is the X-axis direction shown in FIG.
  • the anvil 7 according to this embodiment includes a stepped portion 23 that contacts the overlapping portion R and a stepped portion 23 on both sides of the stepped portion 23 in the sealing direction. It has a pair of groove parts 25a and 25b arranged respectively.
  • the step portion 23 and the groove portions 25a and 25b are formed by processing so as to cut out the surface of the anvil 7.
  • the surface of the anvil 7 in which the step portion 23 and the groove portions 25a and 25b are not formed is referred to as a surface 17, and a virtual surface (step portion) extending the surface 17 over the step portion 23 and the groove portions 25a and 25b.
  • 23 and corresponding to the flat surface position before forming the groove portions 25a and 25b) will be referred to as a temporary surface 17 '.
  • the step portion 23 of the present embodiment is formed at a position corresponding to the overlapping portion R and presses the overlapping portion R.
  • the shape of the stepped portion 23 is formed so that an optimum pressure can be applied to the thickness of the overlapping portion R when the overlapping portion R contacts the stepped portion 23 without being displaced. Further, when the overlapping portion R is displaced with respect to the stepped portion 23, the groove portions 25a and 25b have a role of relieving the pressure applied to the overlapping portion R that is in contact with the portion without the stepped portion 23.
  • the step portion 23 has side surfaces 231 and 232 and a bottom surface 233 parallel to the surface 17 and the temporary surface 17 ′.
  • the side surfaces 231 and 232 of the stepped portions are reversely tapered from the bottom surface 233 toward the surface 17.
  • the length of the stepped portion 23 in the sealing direction is the longest at the position where the stepped portion 23 intersects the temporary surface 17 ′, and the length becomes shorter toward the bottom (bottom side).
  • the maximum value of the length of the step portion 23 is simply referred to as “the length of the step portion”.
  • the length of the stepped portion is indicated by a reference sign “A”.
  • the stepped portion 23 has a reverse taper on the side surfaces 231 and 232, so that the pressure change to the surface to be sealed can be achieved even if the overlapping portion R in the stepped portion 23 is displaced with respect to A. It is reduced.
  • the cross-sectional shape of the groove portions 25a and 25b is a curved shape such as a semicircular shape, and the length of the groove portions 25a and 25b in the sealing direction is the temporary surface. It is the longest at the position where it intersects 17 ', and becomes shorter as it goes downward (bottom side) from the temporary surface 17'.
  • the maximum value of the length of the groove portions 25a and 25b in the sealing direction is simply referred to as “the width of the groove portion”.
  • the width of the groove portions 25a and 25b is indicated by “B”.
  • the width B of the groove is set to 0.5 mm or more and 1.5 mm or less.
  • the depth C of the groove portions 25a and 25b is set to 0.05 mm or more and 1 mm or less.
  • this embodiment reduces the pressure applied to the overlap portion R when the groove portions 25a and 25b abut against the overlap portion R, and The pressure necessary for welding the packaging material 19 can be applied to the tubular material 9 even when it comes into contact with a seal portion other than R.
  • the cross-sectional shapes of the groove 25a and the groove 25b are not limited to a curved shape, and the cross-sectional shape may be a triangular shape or a quadrangular shape.
  • the step portion 23 is disposed so as to be sandwiched between the pair of groove portions 25a and 25b. For this reason, the step part 23 and the groove parts 25a and 25b are adjacent to each other.
  • the distance between the groove portions 25a and 25b and the step portion 23 adjacent to the groove portions 25a and 25b is set to a distance of 0 mm or more and 1.5 mm or less.
  • the distance between the groove portion 25a and the step portion 23 is set such that the end portion of the end portion where the groove portion 25a intersects the provisional surface 17 'is closer to the step portion 23 and the step portion 23 adjacent to the groove portion 25a. Is the distance between the end portion that intersects the temporary surface 17 ′ and the end portion on the side close to the groove portion 25a as the “distance between the groove portion and the step portion”. Similarly, the distance between the groove portion 25b and the step portion 23 is set such that the end portion of the end portion where the groove portion 25b intersects the temporary surface 17 'is closer to the step portion 23 and the step portion 23 adjacent to the groove portion 25b.
  • the distance D between the groove portions 25a and 25b and the step portion 23 is set to 0 mm or more and 1.5 mm or less.
  • the distance between the groove portions 25a and 25b and the adjacent step portion 23 being 0 mm means that the groove portions 25a and 25b and the step portion 23 are in contact with each other in a top view. .
  • the first PE resin 191 melted in the overlapping portion R reaches the groove portions 25a and 25b, and below the groove portions 25a and 25b.
  • the packaging materials 19 are properly fused together.
  • the shape of this embodiment differs in the cross section of the groove parts 25a and 25b along a sealing direction, and the cross section of the level
  • the cross-sectional shape of the groove portions 25a and 25b along the sealing direction is referred to as “the cross-sectional shape of the groove portion”
  • the cross-sectional shape of the step portion 23 along the sealing direction is referred to as “the cross-sectional shape of the step portion”.
  • the cross-sectional shapes of the groove portions 25 a and 25 b are independently formed without depending on the cross-sectional shape of the step portion 23.
  • the step portion 23 is formed so that an optimum pressure is applied to the overlapping portion R when the overlapping portion R contacts the step portion 23 without being displaced.
  • the grooves 25a and 25b relieve pressure applied to the overlapping portion R when abutting against the overlapping portion R, and are necessary for sealing the packaging material 19 even when abutting against a sealing portion other than the overlapping portion R. It is formed so that an appropriate pressure can be applied to the seal portion. For this reason, the level
  • FIG. 5 is a diagram showing the relationship between the length A of the stepped portion 23 and the overlapping portion R of the cylindrical material 9.
  • the length A of the stepped portion 23 is expressed by the following formulas (1) and (2).
  • T 1 in the formula (1) is the length along the sealing direction of the overlapping portion R.
  • T 2 in the formula (2) is a length along the sealing direction of the bottom surface 233.
  • equation (1), in (2), x 1 in a state where the step portion 23 presses the portion R overlap, the deviation between the one and the overlapping portion R of the end portion along the sealing direction of the step portion 23 It is the length along the sealing direction.
  • t is the length of the temporary surface 17 ′ shown in FIG. 4A from one of the end portions along the sealing direction of the stepped portion 23 to the end portion on the near side of the end portions of the bottom surface 233. It is. In the present embodiment, such t is described as “the length along the sealing direction from the end of the stepped portion to the end of the bottom surface”.
  • A T 1 + x 1 + x 2 (1)
  • A 2t + T 2
  • T 2 T 1 + x 1 + x 2 ⁇ 2t Equation (3)
  • t is set to 0.5 mm or more and 5 mm or less.
  • the “step portion” is a recess having a length A longer than or equal to the length T 1
  • the “groove” is a recess having a width B shorter than the length T 1.
  • FIG. 6A and FIG. 6B are diagrams for explaining the effects obtained by the anvil 7 of the present embodiment described above.
  • FIG. 6A is a cross-sectional view along the sealing direction of the anvil 7 when there is no displacement of the overlapping portion R.
  • FIG. FIG. 6B is a cross-sectional view taken along the sealing direction of the anvil 7 when the overlapping portion R is misaligned.
  • the overlapping portion R when the overlapping portion R accurately contacts the stepped portion 23 without being displaced, the overlapping portion R is bent by the stepped portion 23 by being pressed by the horn 5. Enter while. For this reason, in this embodiment, while applying a uniform pressure to the surface 17 by the horn 5, an optimum pressure can be applied to the overlapping portion R having a thickness different from that of the other seal portions. Further, in the present embodiment, when the overlapping portion R comes into contact with the stepped portion 23 accurately, seal portions other than the overlapping portion R come into contact with the groove portions 25a and 25b. At this time, the first PE resin 191 on the inner surface of the cylindrical material 9 is melted by applying vibration. The melted first PE resin 191 moves to the position of the groove portions 25a and 25b by pressurization and contributes to the sealing of the cylindrical material 9 that comes into contact with the groove portions 25a and 25b.
  • the step portion 23 since the step portion 23 contacts the entire overlapping portion R, it is possible to apply pressure uniformly to the overlapping portion R.
  • Such a configuration of the present embodiment prevents damage to the packaging material 19 as compared with a configuration in which the overlapping portion is discontinuously pressurized, and can also reduce the possibility of the contents leaking without impairing the appearance of the package.
  • the overlapping portion R is displaced with respect to the step portion 23, and a part of the overlapping portion R comes into contact with the groove portions 25a and 25b.
  • the groove portions 25a and 25b apply a sufficient pressure for welding the overlapping portion R while avoiding an excessive pressure being applied to the overlapping portion R when pressed by the horn 5.
  • the pair of groove portions 25a and 25b are disposed so as to sandwich the step portion 23 in the sealing direction.
  • the cost for processing the anvil 7 can be relatively small.
  • Table 1 is a table for explaining the range of width B, depth C and distance D and the state of the seal.
  • ⁇ indicates a state in which leakage of the package contents does not occur, and such a state is also referred to as a “good seal state”.
  • x indicates a state in which the contents of the package have leaked, and this state is also referred to as “the seal state is poor”.
  • the width B of the groove portions 25a and 25b is out of the range of 0.5 mm or more and 1.5 mm or less, the overlap portion R is displaced with respect to the step portion 23 if less than 0.5 mm. Therefore, it is impossible to avoid applying an excessive pressure to the overlapping portion R, resulting in a poor sealing state.
  • it exceeds 1.5 mm since the area where an ultrasonic vibration is not transmitted becomes wide, a favorable sealing state cannot be realized, leading to leakage of contents.
  • the overlapping portion R is excessive when the position is shifted with respect to the stepped portion 23. It cannot be avoided that an excessive pressure is applied, and the sealing state becomes poor. Further, when the depth C exceeds 1.0 mm, sufficient pressure is not applied to the overlapping portion R when the position is shifted, and a good sealing state cannot be realized. However, even if the depth C exceeds 1.0 mm, the overlapping portion R can be displaced with respect to the step portion 23 as long as the width B is in the range of 0.5 mm to 1.5 mm. Can be realized.
  • the distance D between the groove portions 25a, 25b and the step portion 23 is out of the range of 0 mm or more and 1.5 mm or less, the section where the ultrasonic vibration is not transmitted becomes wide, so that a sufficient welding state cannot be realized. It will lead to leakage of contents.
  • the distance D is smaller than 0, the step portion and the groove portion do not exist separately, so that the effect of this embodiment cannot be obtained naturally.
  • FIG. 7 is a cross-sectional view along the YZ plane in the three-dimensional coordinates represented by the X, Y, and Z axes in FIG.
  • a long cylindrical material 9 is set in the ultrasonic sealing device, and is conveyed in a direction indicated by an arrow E in the drawing by a conveyance mechanism (not shown). Note that the cylindrical material 9 moves between the horn 5 and the anvil 7 without being loosened by gravity by setting the conveyance direction of the cylindrical material 9 from the top to the bottom.
  • the horn 5 and the anvil 7 approach the tubular material 9 conveyed in the downward direction from the left and right, pressurize the seal portion S of the tubular material 9 and apply vibrations having a frequency based on ultrasonic waves.
  • the first PE resin 191 is melted by vibration, and the inner surface of the cylindrical material 9 is sealed by pressurization.
  • the ultrasonic sealing device is provided with an anvil 7, and a slit is provided at the center of the anvil, and the cutting blade 71 slides out from the slit to cut the tubular material 9. It is provided as follows. On the other hand, a gap 51 is formed in the horn. After the sealing is completed, the cutting blade 71 moves toward the gap 51 and cuts the seal portion S. By cutting the seal portion S, a package in which the upper portion and the bottom portion are sealed is completed. Further, by cutting the seal portion S, the cylindrical material 9 in which only the bottom portion is sealed is formed. Such a cylindrical material 9 is filled with a liquid content.
  • the ultrasonic sealing device has two pairs of mechanisms including the horn 5 and the anvil 7, and the two pairs of mechanisms alternately seal the upper and lower portions of the cylindrical material 9 to produce a package at high speed. can do.
  • the cylindrical material 9 can be sealed by applying an optimum pressure to the overlapping portion R.
  • the cylindrical material 9 can be sealed by supplying a pressure sufficient for sealing and a resin material serving as an adhesive to seal portions other than the overlapping portion R.
  • the cylindrical material 9 can be sealed by supplying a resin material as an appropriate pressure and adhesive.
  • the stepped portion 23 has a shape having a bottom surface 233 parallel to the surface 17 and side surfaces 231 and 232 with reverse taper.
  • the present embodiment is not limited to such a configuration.
  • FIG. 8 is a view showing another example of the step portion according to the present embodiment, and is a cross-sectional view of another anvil 93 along the sealing direction.
  • the anvil 93 has side surfaces 931 and 932 with reverse taper, and does not have a bottom surface.
  • the anvil of this embodiment is not limited to each groove part 25a, 25b formed on both sides of the level
  • the distance between the step portion 23 and the one groove portion 25a is made equal to the distance between the step portion 23 and the other groove portion 25b.
  • the present embodiment is not limited to such a configuration. In the present embodiment, for example, when the amount of displacement of the overlapping portion R with respect to the step portion 23 is biased to either the groove portion 25a or the groove portion 25b, the distance between the step portion 23 and the groove portions 25a, 25b is determined according to the bias. You can also.
  • the present invention can be applied in any field as long as it is an ultrasonic seal anvil that seals packaging materials having overlapping portions.

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Abstract

重なり部分に対し、アンビルとの間に位置ずれが生じない場合には最適な圧力を加え、位置ずれが生じた場合にも過剰な圧力が掛かることを防止することができる超音波シールアンビルを提供する。一方向に延びる重なり部分（Ｒ）を有する筒状資材（９）を、重なり部分（Ｒ）を横切る封止方向に沿って封止する超音波シールアンビル（７）を構成する。アンビル（７）に、重なり部分Ｒに当接可能な段差部（２３）と、封止方向に段差部（２３）を挟んで配置される一対の溝部（２５ａ、２５ｂ）と、を設ける。

Description

超音波シールアンビル
　本発明は、包装資材を封止する超音波シール装置の超音波シールアンビルに関する。
　現在、紙製の包装資材によって飲料等の液体を収容して販売することが行われている。液体収容後の包装資材は、三角錘、四角柱さらには円筒形等といった様々な立体形状に成形される。本明細書では、成形後の包装資材を「パッケージ」と記す。
　このようなパッケージのうち、例えば、略四角柱のパッケージを製造する場合、先ず、長尺の包装資材は、長手方向に沿う両端が重ね合わされ、貼り合わせられて筒状にされる。次に、筒状の包装資材は、筒の下端が封止されて内容物が充填された後、上端が封止される。両端が封止された包装資材は、押圧されて立体的な四角柱に成形される。なお、本明細書では、包装資材の封止を以降「シール」と記す。
　包装資材のシールの技法としては、超音波シールがある。超音波シールでは、包装資材のシールされるシール部分を、ホーンと呼ばれる共振体とアンビルと呼ばれる受治具とによって挟んで加圧する。また、超音波シールでは、加圧と同時にホーンを介して振動エネルギーをシール部分に与え、包装資材内面の熱可塑性樹脂を溶融して包装資材同士を融着する。両端がシールされた包装資材は、押圧されて立体的な四角柱に成形される。
　包装資材のシール部分には、包装資材の両端を重ね合わせた部分が生じる。本明細書では、以降、包装資材が重なった部分を「重なり部分」と記す。重なり部分は、他のシール部分より厚くなり、ホーン及びアンビルによって高い圧力を受けることになる。シール部分を均一の力で加圧するため、重なり部分の位置に合わせてアンビルに凹部を設けることがなされている。このような構成は、例えば、特許文献１に記載されている。
　また、超音波シールは増々高速化される傾向にあり、現在では１分間に１００個から４００個ものパッケージが製造されている。超音波シールの処理が高速化されると、アンビルの凹部とシール部分との位置合わせ精度が低下してアンビルに対する重なり部分の位置ずれが生じる。このような場合、重なり部分に過剰な圧力が印加されてシールの不良が生じ、内容物の漏れが生じる恐れがある。
　重なり部分の位置ずれによる内容物の漏れを防ぐため、アンビルのシール部分を挟む箇所に連続的な溝を形成する超音波シール装置が引用文献２に記載されている。このような超音波シール装置によれば、重なり部分がアンビルに対して位置ずれした場合であっても、溝の凸部分が重なり部分を不連続に加圧する。
特開平１１－４３１１５号公報 特開２００２－３２６２９４号公報
　しかしながら、重なり部分に不連続に圧力を加える構成は、位置ずれの有無に関わらず、重なり部分に対する圧力を緩和するものであり、位置ずれが無い場合であっても重なり部分に最適な圧力を加えることができない恐れがある。また、このような構成は、重なり部分を不連続に加圧するため、重なり部分と当接するアンビルの面積が小さい上にシールに比較的強い圧力が必要になる。このため、包装資材がアンビルの溝に強い力で加圧されたことによって傷つき、外観が損なわれる恐れや、さらには内容物が漏れる恐れが生じる。
　本発明は、上記の点に鑑みてなされたものであり、重なり部分に対し、アンビルとの間に位置ずれが生じない場合には最適な圧力を加え、位置ずれが生じた場合にも過剰な圧力が掛かることを防止することができる超音波シールアンビルを提供することを目的とする。
　以上の課題を解決するため、本発明の一態様の超音波シールアンビルは、一方向に延びる重なり部分を有する包装資材を、上記重なり部分を横切る封止方向に沿って封止する超音波シールアンビルであって、上記重なり部分に当接可能な段差部と、上記封止方向で上記段差部の両側にそれぞれ配置される溝部と、を有することを特徴とする。
　本発明の一態様によれば、重なり部分に対し、アンビルとの間に位置ずれが生じない場合には最適な圧力を加え、位置ずれが生じた場合にも過剰な圧力が掛かることを防ぐことができる超音波シールアンビルを提供することができる。
本発明の実施形態の超音波シール装置を説明するための模式図である。 図１に示した超音波シール装置によって加工される包装資材を説明するための図である。 図２に示した包装資材によって成形される筒状資材を説明するための図である。 図１に示した一部を拡大して示した図である。 本発明の実施形態に係る段差部の長さと重なり部分との関係を示した図である。 本発明の実施形態の効果を説明するための図である。 図１に示した超音波シール装置の動作を説明するための図である。 本発明の実施形態に係るアンビルの他の例を説明するための図である。
　以下、本発明の一実施形態について説明する。
　本実施形態は、略四角柱の外観を有し、内部に液体が充填されたパッケージを製造する例を挙げて本実施形態の超音波シールアンビル（以下、単に「アンビル」とも記す）を説明する。なお、本実施形態が例示するパッケージは、例えばジュースや酒類等の液体や固形分を有する内容物を長期保存するものである。
（全体構成）
　図１は、本実施形態のアンビルが適用される超音波シール装置を説明するための模式図である。図示した超音波シール装置は、超音波発振器１と、コンバータ３と、ホーン５及びアンビル７を備えている。ホーン５とアンビル７との間には、筒状になった包装資材である筒状資材９が挟持されている。また、必要に応じて、ホーン５及びアンビル７の位置関係を図１に示したＸ軸，Ｙ軸およびＺ軸の３次元の座標によって定めるものとする。
　超音波発振器１は、超音波振動子であるコンバータ３に電力を供給する。超音波発振器１によって供給された電力は、コンバータ３によって機械的な振動に変換された後、ホーン５に供給される。ホーン５はアンビル７と共に筒状資材９を挟み込み、筒状資材９を加圧すると共に振動を加えて筒状資材９を図１中のＸ軸方向にシールする。本実施形態では、筒状資材９がシールされる方向（図１ではＸ軸方向）を「封止方向」と記し、筒状資材９のシールされた部分全体を、以降「シール部分」と記す。
（筒状資材）
　ここで、筒状資材９について説明する。図２は、筒状資材９の材料となる包装資材１９を説明するための図である。包装資材１９は、樹脂や紙の多層構造を有している。包装資材１９において、内容物が充填されたパッケージ内部に向く面を「内面」、パッケージ表面に向いた面を「表面」と記す。包装資材１９は、内面の側から順に、第１ポリエチレン（PolyEthylene：以下、ＰＥとも記す）樹脂１９１、バリア材１９２、第２ＰＥ樹脂１９３、紙１９４及び第３ＰＥ樹脂１９５の各層が積層されることによって形成されている。
　第１ＰＥ樹脂１９１は、熱可塑性樹脂であって、包装資材１９の内面同士を溶着する際の接着剤の役割をする。また、バリア材１９２としては、蒸着膜層を形成しバリア性を持たせたポリエチレンテレフタラート（ＰＥＴ）やアルミニウム等が挙げられる。
　図３（ａ）、（ｂ）及び図３（ｃ）は、筒状資材９を説明するための図である。図３（ａ）に示すように、筒状資材９は、長尺形状の包装資材１９の長手方向に沿う端部９１ａ、９１ｂを重ね合わせて形成される。このため、筒状資材９も長尺形状の部材となる。
　図３（ｂ）は、図３（ａ）中に示した線分Ｉ－Ｉで筒状資材９を切った断面図である。
　図３（ｂ）に示すように、本実施形態では、端部９１ａ、端部９１ｂが重なった領域を重なり部分Ｒと記す。重なり部分Ｒは、長尺形状の筒状資材９の長手方向に沿って延びている。
　図３（ｃ）に示すように、重なり部分Ｒの端部９１ａの端部には、エッジプロテクションテープ３１が貼り付けられている。エッジプロテクションテープ３１は、端部９１ａを包装資材１９の内面に貼りつけて包装資材１９を筒状資材９に成形している。
（アンビル）
　図４（ａ）、（ｂ）は、図１に破線で示した部分Ｐを拡大して示した図であって、図４（ａ）はアンビル７の封止方向に沿う断面図、図４（ｂ）は、図４（ａ）に対応するアンビル７の上面図である。アンビル７は、筒状資材９を重なり部分Ｒを横切る方向（封止方向）に封止する。本実施形態では、封止方向を図１中に示したＸ軸方向とする。
　図４（ａ）、（ｂ）に示すように、本実施形態のアンビル７は、重なり部分Ｒに当接する段差部２３と、封止方向で段差部２３を挟んで該段差部２３の両側にそれぞれ配置される一対の溝部２５ａ、２５ｂと、を有している。
　なお、段差部２３及び溝部２５ａ、２５ｂは、アンビル７の表面を切り欠くように加工して形成される。本実施形態では、段差部２３及び溝部２５ａ、２５ｂが形成されていないアンビル７の表面を表面１７と記し、表面１７を段差部２３及び溝部２５ａ、２５ｂ上まで延ばした仮想的な表面（段差部２３及び溝部２５ａ、２５ｂを形成する前の平坦な表面位置に相当）を仮表面１７’と記すものとする。
　本実施形態の段差部２３は、重なり部分Ｒに対応する位置に形成されて重なり部分Ｒを押圧する。段差部２３の形状は、重なり部分Ｒが段差部２３に対して位置ずれすることなく当接した場合、重なり部分Ｒの厚みに最適な圧力を加えることができるように形成されている。また、溝部２５ａ、２５ｂは、重なり部分Ｒが段差部２３に対して位置ずれした場合、段差部２３がない部分に当接した重なり部分Ｒに掛かる圧力を緩和する役割を有する。
　段差部２３は、側面２３１、２３２と、表面１７及び仮表面１７’に平行な底面２３３とを有している。段差部の側面２３１、２３２には、底面２３３から表面１７に向かって逆テーパーが付けられている。このため、段差部２３の封止方向の長さは、段差部２３が仮表面１７’と交わる位置において最も長くなり、下方（底側）に向かうほど短くなる。本実施形態では、以降、段差部２３の長さの最大値を単に「段差部の長さ」と記す。図４（ａ）中に段差部の長さに符号「Ａ」を付して示す。
　また、段差部２３は、側面２３１、２３２に逆テーパーが付いていることにより、段差部２３における重なり部分ＲがＡに対して位置ずれを生じていても封止される面への圧力変化を軽減させている。
　また、図４（ａ）、（ｂ）に示すように、溝部２５ａ、２５ｂの断面形状は半円形状などの曲線形状になっていて、溝部２５ａ、２５ｂの封止方向の長さは仮表面１７’と交わる位置において最も長く、仮表面１７’から下（底側）に向かうほど短くなる。本実施形態では、以降、溝部２５ａ、２５ｂの封止方向における長さの最大値を単に「溝部の幅」と記す。図４（ａ）、（ｂ）中に溝部２５ａ、２５ｂの幅を「Ｂ」で示す。
　本実施形態では、溝部の幅Ｂを、０．５ｍｍ以上、１．５ｍｍ以下とした。溝部２５ａ、２５ｂの幅Ｂをこのような範囲にすることにより、本実施形態は、溝部２５ａ、２５ｂが重なり部分Ｒに当接した場合には重なり部分Ｒに掛かる圧力を緩和し、重なり部分Ｒ以外のシール部分に当接した場合にも包装資材１９の溶着に必要な圧力をシール部分に加えることができる。
　また、断面形状が曲線形状である溝部２５ａ、２５ｂにあっては、封止方向において、その深さが溝部２５ａ、２５ｂの中心に近いほど深くなる。本実施形態では、溝部２５ａ、２５ｂの深さの最大値を「溝部の深さ」と記す。図４（ａ）、（ｂ）中に溝部２５ａ、２５ｂの深さを「Ｃ」で示す。
　本実施形態では、溝部２５ａ、２５ｂの深さＣを、０．０５ｍｍ以上、１ｍｍ以下とした。溝部２５ａ、２５ｂの深さＣをこのような範囲にすることにより、本実施形態は、溝部２５ａ、２５ｂが重なり部分Ｒに当接した場合には重なり部分Ｒに掛かる圧力を緩和し、重なり部分Ｒ以外のシール部分に当接した場合にも包装資材１９の溶着に必要な圧力を筒状資材９に加えることができる。また溝部２５ａと溝部２５ｂの断面形状は曲線形状だけでなく、その断面形状が三角形形状でも四角形形状であっても良い。
　さらに、本実施形態では、段差部２３が一対の溝部２５ａ、２５ｂに挟まれるように配置されている。このため、段差部２３と溝部２５ａ、２５ｂは互いに隣り合う。溝部２５ａ、２５ｂと、溝部２５ａ、２５ｂと隣り合う段差部２３との距離は、０ｍｍ以上、１．５ｍｍ以下の距離に設定されている。
　本実施形態では、溝部２５ａと段差部２３との距離を、溝部２５ａが仮表面１７’と交わる端部のうちの段差部２３に近い側にある端部と、溝部２５ａと隣り合う段差部２３が仮表面１７’と交わる端部のうちの溝部２５ａに近い側にある端部との距離を「溝部と段差部との距離」とする。また、同様に、溝部２５ｂと段差部２３との距離を、溝部２５ｂが仮表面１７’と交わる端部のうちの段差部２３に近い側にある端部と、溝部２５ｂと隣り合う段差部２３が仮表面１７’と交わる端部のうちの溝部２５ｂに近い側にある端部との距離を「溝部と段差部との距離」とする。図４（ａ）、（ｂ）中に溝部２５ａと段差部２３との距離及び溝部２５ｂと段差部２３との距離を「Ｄ」で示す。
　本実施形態では、溝部２５ａ、２５ｂと段差部２３との距離Ｄを０ｍｍ以上、１．５ｍｍ以下とした。なお、本実施形態において、溝部２５ａ、２５ｂと隣り合う段差部２３との距離が０ｍｍとは、溝部２５ａ、２５ｂと段差部２３とが上面視において互いに接した状態にあることを指すものとする。
　溝部２５ａ、２５ｂと段差部２３との距離Ｄをこのような範囲にすることにより、本実施形態は、重なり部分Ｒにおいて溶融した第１ＰＥ樹脂１９１が溝部２５ａ、２５ｂまで達し、溝部２５ａ、２５ｂ下において包装資材１９同士が適正に融着される。
　また、本実施形態は、封止方向に沿う溝部２５ａ、２５ｂの断面と、筒状資材の封止方向に沿う段差部２３の断面との形状が異なっている。本実施形態では、封止方向に沿う溝部２５ａ、２５ｂの断面の形状を「溝部の断面形状」、封止方向に沿う段差部２３の断面形状を「段差部の断面形状」と記す。
　溝部２５ａ、２５ｂの断面形状は、段差部２３の断面形状に依存することなく独立に形成される。段差部２３は、重なり部分Ｒが位置ずれすることなく段差部２３に当接した場合に重なり部分Ｒに最適な圧力が加わるように形成される。一方、溝部２５ａ、２５ｂは、重なり部分Ｒに当接した場合には重なり部分Ｒに掛かる圧力を緩和すると共に、重なり部分Ｒ以外のシール部分に当接した場合にも包装資材１９のシールに必要な圧力をシール部分に加えることができるように形成される。
　このため、段差部２３と溝部２５ａ、２５ｂとは、それぞれの目的に応じて最適な形状になるように形成される。
　図５は、段差部２３の長さＡと筒状資材９の重なり部分Ｒとの関係を示した図である。図５に示すように、段差部２３の長さＡは、以下の式（１）、（２）によって表される。なお、式（１）中のＴ１は重なり部分Ｒの封止方向に沿う長さである。式（２）中のＴ２は底面２３３の封止方向に沿う長さである。なお、式（１）、（２）において、ｘ１は、段差部２３が重なり部分Ｒを押圧した状態において、段差部２３の封止方向に沿う端部の一方と重なり部分Ｒとのずれの封止方向に沿う長さである。ｘ２は、段差部２３が重なり部分Ｒを押圧した状態において、段差部２３の封止方向に沿う端部の他方と重なり部分Ｒとのずれの封止方向に沿う長さである。本実施形態では、このような長さｘ１、ｘ２を、「段差部と重なり部分とのずれ量」と記す。
　また、ｔは、段差部２３の封止方向に沿う端部の一方と、底面２３３の端部のうちの近い側の端部までの図４（ａ）に示した仮表面１７’の長さである。本実施形態では、このようなｔを、「段差部の端部から底面の端部までの封止方向に沿う長さ」と記す。
　　Ａ＝Ｔ１＋ｘ１＋ｘ２　　・・・式（１）
　　Ａ＝２ｔ＋Ｔ２　　　　・・・式（２）
　式（１）、式（２）より、長さＴ１と長さＴ２の間には式（４）の関係があることが分かる。
　　Ｔ２＝Ｔ１＋ｘ１＋ｘ２－２ｔ　・・・式（３）
　上記関係において、本実施形態は、ｔを０．５ｍｍ以上、５ｍｍ以下とする。また、ｘ１及びｘ２を０以上、１．５ｍｍ以下として段差部２３を形成する。
　なお、本実施形態では、「段差部」を長さＡが長さＴ１よりも長いあるいは同等の凹部とし、「溝部」を幅Ｂが長さＴ１よりも短い凹部として両者を区別するものとする。
　図６（ａ）、図６（ｂ）は、以上説明した本実施形態のアンビル７によって得られる効果を説明するための図である。図６（ａ）は、重なり部分Ｒの位置ずれが無い場合のアンビル７の封止方向に沿う断面図である。また、図６（ｂ）は、重なり部分Ｒの位置ずれがある場合のアンビル７の封止方向に沿う断面図である。
　図６（ａ）に示すように、重なり部分Ｒが段差部２３に対して位置ずれすることなく正確に当接する場合、重なり部分Ｒは、ホーン５に押圧されることによって段差部２３に屈曲しながら入り込む。このため、本実施形態は、ホーン５によって表面１７に一様な圧力をかけながら、他のシール部分と厚さが異なる重なり部分Ｒにも最適な圧力をかけることができる。
　また、本実施形態は、重なり部分Ｒが段差部２３に正確に当接する場合、溝部２５ａ、２５ｂには重なり部分Ｒ以外のシール部分が当接する。このとき、筒状資材９の内面の第１ＰＥ樹脂１９１は振動が加えられたことによって溶融する。溶融した第１ＰＥ樹脂１９１は加圧によって溝部２５ａ、２５ｂの位置まで移動して溝部２５ａ、２５ｂと当接する筒状資材９のシールに寄与する。
　なお、本実施形態は、重なり部分Ｒ全体に段差部２３が当接するため、重なり部分Ｒに対して一様に圧力を加えることができる。このような本実施形態の構成は、重なり部分を不連続に加圧する構成に比べて包装資材１９の損傷を防ぎ、パッケージの外観を損なわずに内容物が漏れる可能性も低減することができる。
　一方、図６（ｂ）に示すように、重なり部分Ｒが段差部２３に対して位置ずれし、重なり部分Ｒの一部が溝部２５ａ、２５ｂに当接する。溝部２５ａ、２５ｂは、ホーン５によって押圧された際に重なり部分Ｒに過剰な圧力が加わることを避けながらも重なり部分Ｒの溶着に十分な圧力を印加する。
　なお、重なり部分Ｒの段差部２３に対する位置ずれは、段差部２３の左右どちらの側に生じるかを予測することはできない。本実施形態は、この点に鑑みて段差部２３を封止方向で挟むようにして一対の溝部２５ａ、２５ｂを配置している。
　また、本実施形態は、段差部２３の両側に溝部２５ａ、２５ｂを設けたという比較的簡易な構成のため、アンビル７の加工に掛かるコストが比較的小さくて済む。
　ここで、本実施形態が溝部２５ａ、２５ｂの幅Ｂ、溝部２５ａ、２５ｂの深さＣ、溝部２５ａ、２５ｂと段差部２３との距離Ｄの範囲を限定したことによる効果を説明する。
Figure JPOXMLDOC01-appb-T000001
　表１は、幅Ｂ、深さＣ及び距離Ｄの範囲とシールの状態を説明するための表である。表１において、「〇」はパッケージの内容物の漏れが発生しない状態を示し、このような状態を「良好なシール状態」とも記す。また、「×」はパッケージの内容物の漏れが発生した状態を示し、このような状態を「シール状態が不良」とも記す。
　表１によれば、溝部２５ａ、２５ｂの幅Ｂが、０．５ｍｍ以上、１．５ｍｍ以下の範囲から外れた場合、０．５ｍｍ未満では重なり部分Ｒが段差部２３に対して位置ずれした際に重なり部分Ｒに過剰な圧力が加わることを避けることができず、シール状態が不良となる。また、１．５ｍｍを超える場合、超音波振動が伝わらない区間が広くなるために良好なシール状態を実現できず内容物の漏れにつながってしまう。
　また、溝部２５ａ、２５ｂの深さＣが０．０５ｍｍから１．０ｍｍの範囲から外れた場合、０．０５ｍｍ未満では重なり部分Ｒが段差部２３に対して位置ずれした際に重なり部分Ｒに過剰な圧力が加わることを避けることができず、シール状態が不良となる。また、深さＣが１．０ｍｍを超える場合、位置ずれした際に重なり部分Ｒに充分な圧力が加わらず、良好なシール状態を実現することができない。ただし、深さＣが１．０ｍｍを超える場合であっても幅Ｂが０．５ｍｍ以上、１．５ｍｍ以下の範囲であれば、重なり部分Ｒが段差部２３に対して位置ずれしても良好なシール状態を実現することができる。
　さらに、溝部２５ａ、２５ｂと段差部２３との距離Ｄが０ｍｍ以上、１．５ｍｍ以下の範囲から外れた場合、超音波振動が伝わらない区間が広くなるために、十分な溶着状態を実現できず内容物の漏れにつながる。なお、距離Ｄが０より小さいということは、段差部と溝部とが別個に存在しなくなるので、本実施形態の効果は当然のことながら得ることができない。
（動作）
　次に、本実施形態のアンビルが適用される超音波シール装置の動作を説明する。
　図７は、図１のＸ軸，Ｙ軸，Ｚ軸で表現される３次元の座標におけるＹ－Ｚ平面に沿う断面図である。超音波シール装置には長尺形状の筒状資材９がセットされ、図示しない搬送機構によって図中の矢線Ｅに示す方向に搬送される。なお、筒状資材９の搬送方向を上から下に向かう方向に設定することにより、筒状資材９が重力によって弛むことなくホーン５とアンビル７との間を移動する。
　ホーン５及びアンビル７は、下方向に搬送される筒状資材９に対して左右から接近し、筒状資材９のシール部分Ｓを挟んで加圧すると共に超音波に基づく周波数の振動を加える。振動によって第１ＰＥ樹脂１９１が溶融し、加圧によって筒状資材９の内面がシールされる。
　図７に示すように、超音波シール装置にはアンビル７が設けられていて、そのアンビルの中心にはスリットが設けられ、そのスリットから断裁刃７１がスライドして飛び出し筒状資材９を切断するように設けられている。一方、ホーンには間隙５１が形成されている。シールの終了後、断裁刃７１は間隙５１に向けて移動し、シール部分Ｓを裁断する。シール部分Ｓの裁断により、上部と底部とがシールされたパッケージが完成する。また、シール部分Ｓの裁断により、底部のみがシールされた筒状資材９が形成される。このような筒状資材９には液体の内容物が充填される。
　内容物が充填された筒状資材９の上部は、ホーン５及びアンビル７によって上記と同様にシールされる。シール部分Ｓが断裁刃７１及び間隙５１によって裁断されることによってパッケージが完成する。
　なお、超音波シール装置は、このようなホーン５及びアンビル７を含む機構を２対備え、２対の機構が交互に筒状資材９の上部と下部とをシールすることによって高速にパッケージを製造することができる。
　このような本実施形態によれば、重なり部分Ｒが段差部２３に対して位置ずれしていない場合には重なり部分Ｒに最適な圧力を加えて筒状資材９をシールすることができる。また、重なり部分Ｒ以外のシール部分にはシールに十分な圧力と接着剤となる樹脂材を供給して筒状資材９をシールすることができる。また、本実施形態によれば、重なり部分Ｒが段差部２３に対して位置ずれした場合、段差部２３及び溝部２５ａ、２５ｂによって重なり部分Ｒに過剰な圧力が掛かることを防ぎながら、シールに必要な圧力と接着剤となる樹脂材を供給して筒状資材９をシールすることができる。
　即ち、本実施形態は、重なり部分に対し、アンビルとの間に位置ずれが生じない場合には最適な圧力を加え、位置ずれが生じた場合にも過剰な圧力を緩和することができるものといえる。
　なお、以上説明した本実施形態は、上記構成に限定されるものではない。本実施形態は、段差部２３を表面１７に平行な底面２３３と、逆テーパーが付いた側面２３１、２３２を有する形状とした。しかし、本実施形態は、このような構成に限定されるものでない。
　図８は、本実施形態に係る段差部の他の例を示した図であって、封止方向に沿う他のアンビル９３の断面図である。アンビル９３は、逆テーパーがついた側面９３１、９３２を有し、底面を有さない形状である。
　また、本実施形態のアンビルは、段差部２３を挟んで形成される各溝部２５ａ、２５ｂは１本ずつに限定されるものではない。本実施形態の溝部は、段差部を挟んで段差部の両側にそれぞれ設けられるものであれば、予測される重なり部分の位置ずれ量に応じて、各溝部２５ａ、２５ｂ毎に、複数の溝部をそれぞれ設ける構成のものであってもよい。
　さらに、本実施形態は、段差部２３と一方の溝部２５ａとの距離と、段差部２３と他方の溝部２５ｂとの距離とを等しくしている。しかし、本実施形態は、このような構成に限定されるものではない。本実施形態は、例えば、段差部２３に対する重なり部Ｒの位置ずれ量が溝部２５ａ、溝部２５ｂのどちらかに偏る場合、偏りに応じて段差部２３と溝部２５ａ、２５ｂとの距離を決定することもできる。
　以上説明した本実施形態の図面は模式的なものであり、厚みと平面寸法との関係、各層の厚みの比率等は現実のものとは異なることに留意すべきである。したがって、具体的な厚みや寸法は説明を参酌して判断すべきものである。また、図面相互間においても互いの寸法の関係や比率が異なる部分が含まれていることはもちろんである。
　また、本実施の形態は、本発明の技術的思想を具体化するための構成を例示するものであって、本発明の技術的思想は、構成部品の材質、形状、構造、配置等を特定するものでない。本発明の技術的思想は、特許請求の範囲に記載された請求項が規定する技術的範囲内において、種々の変更を加えることができる。
　本発明は、ここでは記載していない様々な実施の形態等を含むことは勿論である。したがって、本発明の技術的範囲は上記の説明から妥当な特許請求の範囲に記載された発明特定事項によってのみ定められるものである。
　以上、本願が優先権を主張する、日本国特許出願２０１５－１７１１８５号（２０１５年８月３１日出願）の全内容は、参照により本開示の一部をなす。
　本発明は、重なり部分を有する包装資材をシールする超音波シールアンビルであれば、どのような分野においても適用することができる。
１　超音波発振器
３　コンバータ
５　ホーン
７，９３　アンビル
９　筒状資材
１７　表面
１７’　仮表面
１９　包装資材
２３　段差部
２５ａ，２５ｂ　溝部
３１　エッジプロテクションテープ
５１　間隙
７１　断裁刃
９１ａ，９１ｂ　端部
１９１　第１ＰＥ樹脂
１９２　バリア材
１９３　第２ＰＥ樹脂
１９４　紙
１９５　第３ＰＥ樹脂
２３１，２３２，９３１，９３２　側面
２３３　底面

Claims (6)

  1. 　一方向に延びる重なり部分を有する包装資材を、前記重なり部分を横切る封止方向に沿って封止する超音波シールアンビルであって、
    　前記重なり部分に当接可能な段差部と、
    　前記封止方向で前記段差部の両側にそれぞれ配置される溝部と、
    　を有することを特徴とする超音波シールアンビル。
  2. 　前記溝部の幅は、０．５ｍｍ以上、１．５ｍｍ以下であることを特徴とする請求項１に記載の超音波シールアンビル。
  3. 　前記溝部の深さは、０．０５ｍｍ以上、１ｍｍ以下であることを特徴とする請求項１または請求項２に記載の超音波シールアンビル。
  4. 　前記溝部は、当該溝部と隣り合う前記段差部の前記溝部に近い側の端部から、０ｍｍ以上、１．５ｍｍ以下の距離を隔てて形成されることを特徴とする請求項１から請求項３のいずれか１項に記載の超音波シールアンビル。
  5. 　前記封止方向に沿う前記溝部の断面の形状と、前記封止方向に沿う前記段差部の断面との形状とが異なることを特徴とする請求項１から請求項４のいずれか１項に記載の超音波シールアンビル。
  6. 　前記段差部は、底面と、該底面から表面に向かって逆テーパーを持って延びる側面と、を有し、
    　前記包装資材は長尺形状であり、長尺形状の長手方向に沿う両端部が重ねられた重なり部分を有し、
    　前記重なり部分の前記封止方向の長さＴ１と、前記底面の前記封止方向の長さＴ２との間に、
    　Ｔ１＋ｘ１＋ｘ２－２ｔ＝Ｔ２
    　ｘ１、ｘ２：０以上、１．５ｍｍ以下
    　ｔ：０．５ｍｍ以上、５ｍｍ以下
    　ｘ１、ｘ２：段差部と重なり部分とのずれ量
    　ｔ：段差部の端部から底面の端部までの封止方向に沿う長さ
    　の関係があることを特徴とする請求項１から請求項５のいずれか１項に記載の超音波シールアンビル。
PCT/JP2016/072219 2015-08-31 2016-07-28 超音波シールアンビル WO2017038330A1 (ja)

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