WO2015093061A1 - 液体用紙容器の超音波シール装置 - Google Patents

液体用紙容器の超音波シール装置 Download PDF

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Publication number
WO2015093061A1
WO2015093061A1 PCT/JP2014/006357 JP2014006357W WO2015093061A1 WO 2015093061 A1 WO2015093061 A1 WO 2015093061A1 JP 2014006357 W JP2014006357 W JP 2014006357W WO 2015093061 A1 WO2015093061 A1 WO 2015093061A1
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WO
WIPO (PCT)
Prior art keywords
packaging material
anvil
paper container
overlapping
ultrasonic sealing
Prior art date
Application number
PCT/JP2014/006357
Other languages
English (en)
French (fr)
Inventor
裕一郎 安田
柚原　徳崇
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凸版印刷株式会社
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Publication of WO2015093061A1 publication Critical patent/WO2015093061A1/ja

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    • 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
    • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • 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
    • B29C66/01—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
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • 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
    • B29C66/739—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
    • 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
    • B29C66/81425—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 stepped, e.g. comprising a shoulder
    • 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
    • B65B2220/00—Specific aspects of the packaging operation
    • 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
    • B65B9/12—Subdividing filled tubes to form two or more packages by sealing or securing involving displacement of contents

Definitions

  • the present invention relates to an ultrasonic sealing device for a liquid paper container.
  • the liquid paper container is a container used for filling liquid foods, etc., and is widely used for liquid drinks such as fruit drinks, tea, coffee, milk drinks, soups, and sakes such as sake and shochu. Yes.
  • Examples of the liquid paper container include a roof shape, a brick shape, and a cylindrical shape.
  • the liquid paper container described above may be manufactured using an ultrasonic sealing device.
  • this ultrasonic sealing device for example, there are devices described in Patent Documents 1 and 2.
  • Patent Documents 1 and 2 describe an ultrasonic sealing device including an anvil having a recessed structure for holding a packaging material step portion provided in a cylindrical packaging material.
  • the present invention can increase the allowable value of the amount of deviation even when the position of the recessed portion of the anvil and the stepped portion of the packaging material is displaced, eliminating the need for a step positioning sensor,
  • An object of the present invention is to provide an ultrasonic sealing device for a liquid paper container that can be used.
  • the tubular packaging material that is sealed by overlapping both ends of the packaging material, the horn and the anvil are arranged in a direction crossing the packaging material step portion formed by the overlapping of the both ends.
  • An ultrasonic sealing device for a liquid paper container that seals the cylindrical packaging material using the packaging material in a direction in which the cylindrical packaging material is sealed to a portion where the packaging material step portion of the anvil contacts.
  • An ultrasonic sealing device for a liquid paper container comprising: a concave shape portion having a concave portion matched with a cross-sectional shape of a material step portion, wherein the concave portion has a tapered shape.
  • the ultrasonic sealing device for a liquid paper container according to one aspect of the present invention, even if the position of the anvil recess and the packaging material step is shifted, the tolerance of the shift amount is increased. This eliminates the need for a step positioning sensor and makes it possible to handle high-speed seals.
  • FIG. 2B is a schematic diagram showing a cross section taken along the line AA ′ of FIG.
  • FIG. 2C is a schematic diagram showing an enlarged view of a portion surrounded by a broken line 21 in FIG.
  • FIG.2 (c) It is a schematic diagram which shows the structure of the packaging material level
  • FIG. 1 is a schematic diagram showing a schematic configuration of an ultrasonic sealing device for a liquid paper container according to an embodiment of the present invention.
  • an ultrasonic sealing device for a liquid paper container according to the present embodiment includes an ultrasonic oscillator 11, a converter 12 connected to the ultrasonic oscillator 11, a horn 13 connected to the converter 12, An anvil 14 provided facing the horn 13 and a seal bar 16 provided on the surface of the horn 13 on the anvil 14 side are provided.
  • an example of a method for sealing a cylindrical packaging material using the ultrasonic sealing device according to this embodiment will be briefly described. First, electrical energy from the ultrasonic oscillator 11 is converted into mechanical vibration by the converter 12.
  • the tubular packaging material 15 is sandwiched between the horn 13 and the anvil 14 having the seal bar 16, and pressure is applied to the tubular packaging material 15.
  • strong frictional heat is generated at the boundary surface between the two thermoplastic resin layers provided in the cylindrical packaging material 15 or where stress is concentrated, and this serves as a heat source to melt and weld the thermoplastic resin layer.
  • the cylindrical packaging material 15 is sealed in the transverse direction by converting electrical energy generated by the ultrasonic oscillator 11 into mechanical vibration energy using a converter (piezoelectric element) 12 using an ultrasonic sealing device, and including a seal bar 16.
  • the cylindrical wrapping material 15 is pressed by the horn (vibration side) 13 and the anvil (vibration receiving side) 14, it is present on the surface of the cylindrical packaging material 15 due to heat generated at the interface of the cylindrical packaging material 15.
  • the thermoplastic resin is melted and sealed.
  • the cylindrical packaging material 15 is sealed and a liquid paper container is manufactured.
  • FIG. 2 is an example of a packaging material used in an ultrasonic sealing device for a liquid paper container according to an embodiment of the present invention, and is a long tubular packaging material provided with a thermoplastic resin layer on both sides of a paper layer.
  • 15 is a schematic diagram showing the structure of FIG.
  • FIG. 2A is a schematic view of the cylindrical packaging material 15 as viewed from the side.
  • FIG. 2B is a schematic diagram showing a cross section taken along the line AA ′ of FIG.
  • FIG.2 (c) is a schematic diagram which expands and shows the part enclosed with the broken line 21 of FIG.2 (b).
  • the cylindrical packaging material 15 includes, for example, a packaging material end 22 that is one end of the packaging material and a packaging material that is the other end of the packaging material so that the packaging material has a cylindrical shape.
  • the edge 24 is overlapped with the packaging material end 22 so that the packaging material end 22 is positioned inside, and the packaging material end 22 is wrapped with the edge protection tape 23 so as to cover the inside (inner surface side) of the overlapped portion.
  • the material end portion 24 is bonded and molded. By molding in this way, the packaging material step portion 25 is formed in the cylindrical packaging material 15.
  • FIG. 3 is a schematic diagram showing the structure of the packaging material step portion 25 in FIG. 2C and the thickness step at each location in the cross section of the packaging material step portion 25.
  • the packaging material level difference portion 25 includes an overlapping portion 31 where two packaging materials (the packaging material end 22 and the packaging material end 24) overlap, and an overlapping where the two packaging materials overlap with the edge protection tape 23. And an overlapping portion 33 in which the edge protection tape 23 overlaps with one portion of the packaging material 32 (the packaging material end 24).
  • the packaging material level difference portion 25 has a level difference due to the difference in thickness between the above portions.
  • the steps of the respective parts are indicated by steps 31a to 33a.
  • the thickness of the edge protect tape 23 provided in the packaging material step portion 25 is usually thinner than the thickness of the packaging material.
  • the part which consists of one sheet of packaging material is shown as the non-overlapping part 30.
  • the thickness of the edge protection tape 23 provided in the packaging material step portion 25 is usually thinner than the thickness of the packaging material. Therefore, the overlapping portion 33 is the shallowest recess (that is, the smallest step) with respect to the other recesses because the packaging material end 24 and the edge protection tape 23 overlap. In addition, since the overlapping portion 32 overlaps the packaging material end portion 22 and the packaging material end portion 24 and further overlaps the edge protection tape 23, the overlapping portion 32 has the deepest recess (that is, the largest step) with respect to the other recesses. It has become.
  • the overlapping portion 31 does not include the edge protection tape 23, and the packaging material end portion 22 and the packaging material end portion 24 overlap each other, so that the dent is deeper than the overlapping portion 33 (that is, larger than the step 33a). And a dent shallower than the overlapping portion 32 (that is, a step smaller than the step 32a).
  • FIG. 4 is a schematic view showing a cross-sectional view of ultrasonic sealing of the tubular packaging material 15 with a horn (not shown) and the anvil 14.
  • the anvil 14 has three stages (represented by recesses 31 b, 32 b, and 33 b) for the purpose of preventing damage to the packaging material step portion 25 of the cylindrical packaging material 15 during ultrasonic sealing. ).
  • the flat part 30b of the anvil 14 has shown the part which the part (one non-overlapping part 30) of a packaging material contacts at the time of sealing of the cylindrical packaging material 15, and becomes a reference surface of the said 3 steps
  • the recessed structure of the anvil 14 is in accordance with the shape of the packaging material step portion 25. Furthermore, as shown in FIG. 4, when the recesses (recesses 31 b, 32 b, 33 b) provided in the recess structure have a tapered shape, a positional shift occurs between the anvil 14 and the packaging material step 25. Even if it exists, it becomes difficult to produce an abrupt pressure difference in the level difference part of the packaging material level difference part 25, and it is possible to increase the allowable value of the positional deviation in the width direction (left and right direction in the drawing) of the anvil 14. In this case, by setting the installation position of the anvil 14 in advance so that the taper-shaped central portions 34 to 37 (portions indicated by arrows in FIG.
  • the installation position of the anvil 14 is set in advance so that the tapered central portion 34 is in contact with the boundary portion between the non-overlapping portion 30 and the overlapping portion 33.
  • the taper-shaped central portion 35 is at the boundary between the overlapping portion 32 and the overlapping portion 33
  • the central portion 36 is at the boundary between the overlapping portion 31 and the overlapping portion 32
  • the central portion 37 is not overlapped.
  • the installation position of the anvil 14 is set in advance so as to be in contact with the boundary portion between the portion 30 and the overlapping portion 31.
  • the “dent structure” of the anvil 14 according to the present embodiment corresponds to the “concave shape portion” of the present application
  • the “dent” included in the recess structure of the anvil 14 corresponds to the “concave section” of the present application.
  • the overlapping portion 31, the overlapping portion 32, and the overlapping portion 33 according to the present embodiment correspond to the “first overlapping portion”, “second overlapping portion”, and “third overlapping portion” of the present application, respectively. It is.
  • both end portions in the width direction in a long packaging material having a thermoplastic resin layer on both sides of the paper layer It is possible to seal the packaging material end portion 22 and the packaging material end portion 24) in a direction crossing the packaging material step portion 25 of the long tubular packaging material 15 which is sealed.
  • step-difference part 25 of the anvil 14 contacts has the dent (recessed part 31b, 32b, 33b) according to the cross-sectional shape of the packaging material level
  • a recess structure is provided.
  • the step portion of the anvil 14 is tapered.
  • the width direction of the cylindrical packaging material 15 It is possible to increase the allowable deviation in position. More specifically, with the anvil 14 according to the present embodiment, it is possible to increase the allowable width of displacement in the width direction as compared with the case where an anvil having a multi-stage dent structure is used. Therefore, the ultrasonic sealing device for the liquid paper container according to the present embodiment can avoid a sealing failure. Further, the step positioning sensor is not required, and it is possible to cope with high-speed sealing. Moreover, the influence on the external appearance of a seal
  • the depths of the recesses (recesses 31b, 32b, 33b) provided in the anvil 14 are set to the overlapping part 31, the overlapping part 32, and the overlapping part.
  • Each thickness of 33 is adjusted.
  • the recess structure of the anvil 14 includes recesses 31b, 32b, and 33b having depths that match the steps 31a, 32a, and 33a of the packaging material step portion 25.
  • the recess structure of the anvil 14 is a structure in which the depth is changed in multiple stages depending on the thickness of the sealing portion (wrapping material step portion 25) of the liquid paper container, it is uniform when the cylindrical packaging material 15 is sealed. Can be applied to each overlapping portion of the overlapping portions 31, 32, 33. Thus, by eliminating the non-uniformity of pressing, a uniform seal can be performed, and a seal failure can be avoided.
  • the seal bar may be formed integrally with the horn 13 or the anvil 14. That is, the horn 13 or the anvil 14 may include the seal bar as a part thereof.
  • the edge protection tape 23 is affixed to the packaging material end 22 of the packaging material having the thermoplastic resin layer on the front and back of the paper layer.
  • this packaging material is formed into a cylindrical shape, and the packaging material end portion 22 and the packaging material end portion 24 are stacked and pasted to form a cylindrical shape.
  • the packaging material end 22 is arranged inside the packaging material end 24.
  • the lower end portion of the cylindrical packaging material 15 is sealed in the transverse direction using the ultrasonic sealing device for the liquid paper container according to the present embodiment.
  • the cylindrical packaging material 15 is filled with the contents, and the upper end portion of the cylindrical packaging material 15 is sealed and partitioned in the filled state. Finally, the cylindrical packaging material 15 is formed into a three-dimensional shape, for example, a brick shape. In this way, a product in which the liquid content is filled in the liquid paper container is manufactured.
  • FIG. 5 is a schematic view showing an example of an ultrasonic sealing device according to the prior art.
  • FIG. 6 is a schematic diagram for explaining a problem that occurs when a cylindrical packaging material is sealed using an ultrasonic sealing device having a flat sealing surface of a horn or an anvil.
  • the structure of the ultrasonic sealing device according to the prior art is the same as the structure of the ultrasonic sealing device according to this embodiment described above, but the structure of the sealing surface of the anvil 4 is different. Therefore, hereinafter, the structure of the sealing surface of the anvil 4 according to the related art will be described.
  • FIG. 6 shows the horn 3 and the anvil 4 having a flat sealing surface.
  • the packaging material level difference portion 6 overlaid with the packaging material end portions is excessively pressed.
  • the packaging material may be broken or the packaging material may be broken due to the concentration of the molten thermoplastic resin at one location, and the appearance of the molded container may deteriorate.
  • a favorable seal cannot be realized due to the non-uniformity of the pressure on the seal surface, which causes liquid leakage.
  • the shape of the recess for holding the packaging material step portion 6 in the anvil is an arc shape or a trapezoidal shape (not shown), between the shape of the recess and the shape of the packaging material step portion 6.
  • a gap occurs.
  • the depth of the shape of the dent there is a problem that it is too shallow to avoid insufficient sealing of the cylindrical packaging material, or too deep to avoid damage to the packaging material due to excessive sealing. Can happen.
  • the cylindrical packaging material is sealed using a multistage anvil conforming to the shape of the packaging material step portion 6, uniform ultrasonic sealing by uniform pressing can be realized.
  • the ultrasonic sealing device can increase the allowable value of the shift amount even when the positions of the recessed portion of the anvil and the step portion of the packaging material are shifted.

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Abstract

　アンビルの凹み部分と包材段差部分との位置がずれた場合であっても、そのずれ量の許容値を大きくすることが可能で段差位置決めセンサを不要とし高速シールへの対応が可能な液体用紙容器の超音波シール装置を提供する。本発明に係る液体用紙容器の超音波シール装置は、包材の包材端部（２２、２４）同士を重ね合せてシールした筒状包材の包材段差部分（２５）を横断する方向に、ホーンとアンビル（１４）とを用いて筒状包材をシールする超音波シール装置であって、アンビル（１４）の包材段差部分（２５）が接触する部分に、筒状包材をシールする方向での包材段差部分（２５）の断面形状に合わせた凹部（３１ｂ、３２ｂ、３３ｂ）を有する凹型形状部を備え、その凹部（３１ｂ、３２ｂ、３３ｂ）の形状は、テーパー形状をしている。

Description

液体用紙容器の超音波シール装置
　本発明は、液体用紙容器の超音波シール装置に関する。
　液体用紙容器は、液体を含んだ食品等の充填に使用される容器であり、例えば、果実飲料、お茶、コーヒー、乳飲料、スープ等の液体飲料、日本酒、焼酎等の酒類に広く用いられている。この液体用紙容器には、例えば、屋根型やレンガ型、あるいは円筒型等の形状をしたものがある。
　上述の液体用紙容器は、超音波シール装置を用いて製造される場合がある。この超音波シール装置としては、例えば、特許文献１、２に記載されたものがある。この特許文献１、２には、筒状包材に備わる包材段差部分をおさめるための凹み構造を有するアンビルを備えた超音波シール装置が記載されている。
特許第３９０４６７５号公報 特許第４３１６０５３号公報
　特許文献１、２に記載された超音波シール装置には、アンビルの凹み構造に備わる凹み部分と包材段差部分との位置がずれた場合に、包材段差部分における押圧が不均一となり、例えば、シール不良やシール過剰による包材への損傷等が生じ得るといった課題がある。また、包材段差部分における押圧が不均一となることで生ずる上述の不都合を解消するために、段差位置決めセンサを備えた場合には、高速シールへの対応が困難となるといった課題がある。
　そこで、本発明は、アンビルの凹み部分と包材段差部分との位置がずれた場合であっても、そのずれ量の許容値を大きくすることが可能で段差位置決めセンサを不要とし高速シールへの対応が可能な液体用紙容器の超音波シール装置を提供することを目的とする。
　そこで、本発明の一態様は、包材の両端部を重ね合せてシールした筒状包材の、前記両端部の重ね合わせによって形成された包材段差部分を横断する方向に、ホーンとアンビルとを用いて前記筒状包材をシールする液体用紙容器の超音波シール装置であって、前記アンビルの前記包材段差部分が接触する部分に、前記筒状包材をシールする方向での前記包材段差部分の断面形状に合わせた凹部を有する凹型形状部を備え、前記凹部の形状は、テーパー形状であることを特徴とする液体用紙容器の超音波シール装置である。
　本発明の一態様に係る液体用紙容器の超音波シール装置によれば、アンビルの凹み部分と包材段差部分との位置がずれた場合であっても、そのずれ量の許容値を大きくすることが可能で段差位置決めセンサを不要とし高速シールへの対応が可能となる。
本発明の実施形態に係る液体用紙容器の超音波シール装置の概略構成を示す模式図である。 本発明の実施形態に係る液体用紙容器の超音波シール装置で使用される包材の一例であって、紙層の表裏に熱可塑性樹脂層を備えた長尺の筒状包材の構造を示す模式図である。（ａ）は、筒状包材を側面から見た模式図である。（ｂ）は、図２（ａ）のＡ－Ａ´の断面を示す模式図である。（ｃ）は、図２（ｂ）の破線２１で囲まれた部分を拡大して示す模式図である。 図２（ｃ）の包材段差部分２５の構造と、包材段差部分２５の断面における各場所の厚みの差とをそれぞれ示す模式図である。 ホーンとアンビルとによって筒状包材を超音波シールする様子を断面で示す模式図である。 従来技術に係る超音波シール装置の一例を示す模式図である。 ホーンやアンビルのシール面が平坦である超音波シール装置を用いて筒状包材をシールした場合に発生する不具合を説明するための模式図である。
　以下の詳細な説明では、本発明の実施形態の完全な理解を提供するように多くの特定の細部について記載される。しかしながら、かかる特定の細部がなくても１つ以上の実施形態が実施できることは明らかであろう。他にも、図面を簡潔にするために、周知の構造及び装置が略図で示されている。
　以下、本発明の液体用紙容器の超音波シール装置の実施形態を、図１から図４を用いて説明する。なお、以下に説明する各図において、同一の構成を有する部分には同一の符号を付し、その繰り返しの説明は省略する。
　図１は、本発明の実施形態に係る液体用紙容器の超音波シール装置の概略構成を示す模式図である。図１に示すように、本実施形態に係る液体用紙容器の超音波シール装置は、超音波発振器１１と、超音波発振器１１に接続されたコンバータ１２と、コンバータ１２に接続されたホーン１３と、ホーン１３に対向して設けられたアンビル１４と、ホーン１３のアンビル１４側の面に設けられたシールバー１６とを備えている。
　以下、本実施形態に係る超音波シール装置を用いた筒状包材のシール方法の例について、簡単に説明する。まず、超音波発振器１１からの電気エネルギーをコンバータ１２で機械的な振動に変換する。次に、シールバー１６を備えたホーン１３及びアンビル１４で筒状包材１５を挟み込み、筒状包材１５に圧力をかける。こうすることで、筒状包材１５に備わる２つの熱可塑性樹脂層の境界面や応力の集中したところに強力な摩擦熱を発生させ、これが熱源となって熱可塑性樹脂層が溶融し溶着する。換言すると、筒状包材１５の横断方向へのシールは、超音波シール装置で超音波発振器１１による電気エネルギーをコンバータ(圧電素子)１２で機械的な振動エネルギーに変換し、シールバー１６を備えたホーン(振動側)１３とアンビル(振動の受側)１４とで筒状包材１５を押圧しながら、筒状包材１５の界面で発生する熱により筒状包材１５の表面に存在する熱可塑性樹脂を溶融させシールを行う。このようにして、筒状包材１５をシールし、液体用紙容器を製造する。
　図２は、本発明の実施形態に係る液体用紙容器の超音波シール装置で使用される包材の一例であって、紙層の表裏に熱可塑性樹脂層を備えた長尺の筒状包材１５の構造を示す模式図である。図２（ａ）は、筒状包材１５を側面から見た模式図である。また、図２（ｂ）は、図２（ａ）のＡ－Ａ´の断面を示す模式図である。また、図２（ｃ）は、図２（ｂ）の破線２１で囲まれた部分を拡大して示す模式図である。
　本実施形態に係る筒状包材１５は、例えば、包材が筒状になるように包材の一方の端部である包材端部２２と、包材の他方の端部である包材端部２４とを、包材端部２２が内側に位置するように重ね合わせ、その重ね合わせた部分の内側（内面側）を覆うようにして、エッジプロテクトテープ２３で包材端部２２と包材端部２４とを貼り合わせて成形したものである。このように成形することによって、筒状包材１５には包材段差部分２５が形成される。
　図３は、図２（ｃ）の包材段差部分２５の構造と、包材段差部分２５の断面における各場所の厚みの段差とをそれぞれ示す模式図である。
　図３に示すように、包材段差部分２５は、包材２枚（包材端部２２と包材端部２４）が重なる重なり部３１、包材２枚とエッジプロテクトテープ２３とが重なる重なり部３２、包材１枚（包材端部２４）とエッジプロテクトテープ２３とが重なる重なり部３３と、を備えている。また、包材段差部分２５には、上記各部の厚みの差に起因した段差がある。図３において、上記各部の段差は、段差３１ａ～３３ａでそれぞれ示されている。また、包材段差部分２５に備わるエッジプロテクトテープ２３の厚みは、通常、包材の厚みよりも薄い。なお、包材１枚からなる部分は、非重なり部３０として示されている。
　上述したように、包材段差部分２５に備わるエッジプロテクトテープ２３の厚みは、通常、包材の厚みよりも薄い。そのため、重なり部３３は、包材端部２４とエッジプロテクトテープ２３とが重なっているため、他の凹みに対して最も浅い凹み（つまり、最も小さい段差）となっている。また、重なり部３２は、包材端部２２と包材端部２４とが重なり、更にエッジプロテクトテープ２３が重なっているため、他の凹みに対して最も深い凹み（つまり、最も大きい段差）となっている。また、重なり部３１は、エッジプロテクトテープ２３を備えておらず、包材端部２２と包材端部２４とが重なっているため、重なり部３３よりも深い凹み（つまり、段差３３ａよりも大きい段差）になっており、また、重なり部３２よりも浅い凹み（つまり、段差３２ａよりも小さい段差）となっている。
　図４は、ホーン（図示せず）とアンビル１４とによって筒状包材１５を超音波シールする様子を断面で示す模式図である。図４に示すように、アンビル１４は、超音波シール時に筒状包材１５の包材段差部分２５への損傷を防止することを目的として、例えば、３段階（凹部３１ｂ、３２ｂ、３３ｂで示す）の凹み構造を有している。なお、アンビル１４の平坦部３０ｂは、筒状包材１５のシール時に包材１枚の部分（非重なり部３０）が接触する部分を示しており、上記３段階の凹み構造の基準面となる部分である。
　本実施形態に係るアンビル１４の凹み構造は、包材段差部分２５の形状に即したものとなっている。更に、図４に示すように、凹み構造に備わる各凹み（凹部３１ｂ、３２ｂ、３３ｂ）をテーパー形状にすることによって、アンビル１４と包材段差部分２５との間で位置ずれが生じた場合であっても包材段差部分２５の段差部分に急激な圧力差が生じにくくなり、アンビル１４の幅方向（図面左右方向）への位置ずれの許容値を高めることを可能としている。この場合、テーパー形状の中心部３４～３７（図４の矢印で示す部分）が包材段差部分２５の段差部分に接するように、予めアンビル１４の設置位置を設定しておくことによって、アンビル１４と包材段差部分２５とが図面左右方向に位置ずれを生じた場合であっても、上記段差部分に急激な圧力差が生じなくなる。より詳しくは、例えば、テーパー形状の中心部３４が非重なり部３０と重なり部３３との境界部分に接するように、予めアンビル１４の設置位置を設定しておく。同様に、テーパー形状の中心部３５が重なり部３２と重なり部３３との境界部分に、また、中心部３６が重なり部３１と重なり部３２との境界部分に、また、中心部３７が非重なり部３０と重なり部３１との境界部分に、それぞれ接するように、予めアンビル１４の設置位置を設定しておく。
　なお、本実施形態に係るアンビル１４の「凹み構造」は、本願の「凹型形状部」に対応し、アンビル１４の凹み構造に備わる「凹み」は、本願の「凹部」に対応するものである。また、本実施形態に係る重なり部３１、重なり部３２、重なり部３３は、本願の「第１の重なり部」、「第２の重なり部」、「第３の重なり部」にそれぞれ対応するものである。
(効果)
（１）以上のように、本実施形態に係る液体用紙容器の超音波シール装置によれば、紙層の表裏に熱可塑性樹脂層を持たせた長尺の包材における幅方向の両端部（包材端部２２と包材端部２４）を重ね合せてシールした長尺の筒状包材１５の包材段差部分２５を横断する方向にシールすることが可能である。
　また、アンビル１４の包材段差部分２５が接触する部分には、筒状包材１５をシールする方向での包材段差部分２５の断面形状に合わせた凹み（凹部３１ｂ、３２ｂ、３３ｂ）を有する凹み構造が設けられている。また、本実施形態では、アンビル１４の段差部分をテーパー形状化している。
　このため、筒状包材１５のシール時に、包材段差部分２５に発生する押圧の不均一性を取り除き、またシール過剰による包材への損傷を回避し、かつ筒状包材１５の幅方向への位置ずれ許容値を高めることができる。より詳しくは、本実施形態に係るアンビル１４であれば、凹み構造が多段形状のアンビルを使用した場合に比べ幅方向ずれの許容幅を大きくすることができる。したがって、本実施形態に係る液体用紙容器の超音波シール装置であれば、シール不良を回避することができる。また、段差位置決めセンサを不要とし高速シールへの対応が可能となる。また、多段形状をしたアンビルに比べ、シールの外観への影響を低減することができる。
（２）また、本実施形態に係る液体用紙容器の超音波シール装置では、アンビル１４に設けられた凹み（凹部３１ｂ、３２ｂ、３３ｂ）の深さを、重なり部３１、重なり部３２、重なり部３３の各厚みに合わせている。より詳しくは、アンビル１４の凹み構造は、包材段差部分２５の段差３１ａ、３２ａ、３３ａに合わせた深さを有する凹部３１ｂ、３２ｂ、３３ｂを備えている。このように、アンビル１４の凹み構造が、液体用紙容器のシール部（包材段差部分２５）の厚みによって多段に深さを変えた構造であるために、筒状包材１５のシール時に、均一な押圧を重なり部３１、３２、３３の各重なり部に付与することができる。こうして、押圧の不均一さを解消することで、均一なシールを行うことができ、シール不良を回避することができる。
（変形例）
　なお、上述の実施形態では、図１に示すように、シールバー１６をホーン１３のアンビル１４側の面に設けた場合について説明したが、本発明はこれに限定されるものではない。例えば、シールバーをアンビル１４のホーン１３側の面に設けてもよい（図示せず）。ただし、その場合には、シールバーのシール面に、包材段差部分２５をおさめるための上記凹み構造を設ける必要がある。このシールバーのシール面に設けられた凹み構造は、図４に示した本実施形態に係る凹み構造と同じ構造である。即ち、本願発明において、シールバーは、ホーン１３、アンビル１４のいずれか一方に設けられていればよい。
　また、このような変形例に係る超音波シール装置であっても、上述の作用効果と同様の作用効果を奏する。
　もちろん、シールバーは、ホーン１３又はアンビル１４と一体的に形成されたものであってもよい。つまり、ホーン１３又はアンビル１４は、その一部として、上記シールバーを備えたものであってもよい。
　以下、本実施形態に係る液体用紙容器の超音波シール装置を用いて、液体用紙容器に液体内容物が充填された製品を製造する方法について、簡単に説明する。まず、紙層の表裏に熱可塑性樹脂層を有する包材の包材端部２２にエッジプロテクトテープ２３を貼る。次に、この包材を筒状に成形し、包材端部２２と包材端部２４とを重ねて貼ることで筒状形状にする。この際、包材端部２２を包材端部２４の内側に配置する。次に、この筒状包材１５の下端部を、本実施形態に係る液体用紙容器の超音波シール装置を用いて横断方向にシールする。その後、筒状包材１５の中に内容物を充填し、充填した状態で筒状包材１５の上端部をシールして仕切る。最後に、その筒状包材１５を立体形状に成形して、例えばレンガ型にする。こうして、液体用紙容器に液体内容物が充填された製品を製造する。
　図５は、従来技術に係る超音波シール装置の一例を示す模式図である。また、図６は、ホーンやアンビルのシール面が平坦である超音波シール装置を用いて筒状包材をシールした場合に発生する不具合を説明するための模式図である。
　図５に示すように、従来技術に係る超音波シール装置の構造は、上述した本実施形態に係る超音波シール装置の構造と同じであるが、アンビル４のシール面の構造が異なっている。よって、以下、従来技術に係るアンビル４のシール面の構造について説明する。
　図６には、シール面が平坦なホーン３及びアンビル４が示されている。なお、図６には、ホーン３とアンビル４との間に配置されたシールバー７も示されている。このシールバー７を備えたホーン３及びアンビル４が備わる超音波シール装置を用いて筒状包材１５をシールした場合、包材端部を重ねて貼った包材段差部分６を過剰に押圧することによって、包材切れや溶融した熱可塑性樹脂の一箇所への集中による包材の破れが発生し、成形した容器の外観が悪化することがある。更に、シール面での押圧の不均一性から良好なシールを実現できず、液漏れが発生する原因となる。
　また、アンビルに包材段差部分６をおさめるための凹みの形状を、円弧形状や台形形状とした場合には（図示せず）、その凹みの形状と包材段差部分６の形状との間に隔たりが生ずる。このため、凹みの形状の深さに関し、筒状包材のシールが不十分となるのを回避するため浅くし過ぎたり、シール過剰による包材への損傷を回避するため深くし過ぎたりといった問題が起こりうる。
　また、包材段差部分６の形状に即した多段形状のアンビルを用いて、筒状包材をシールした場合には、均一な押圧による一様な超音波シールを実現し得る。しかしながら、この場合であっても、アンビルの凹み部分と包材段差部分６との位置がずれることによって均一な超音波シールに対する効果が著しく低下することがある。そのため、位置ずれを防止するための対策として、段差の位置決めセンサを設ける対策が必要となることがある。
　ここで、段差の位置決めセンサを設けた超音波シール装置を用いて、実際のレンガ型液体用紙容器を生産する場合、装置能力を７２００パック／時と想定すると、１パックを０．５秒で生産する必要がある。パックの成形等を考慮するとシール時間は０．５秒以下となる。このような状況下において、その間に位置決めセンサによる段差検出及び包材の位置移動を行うのは、センシング能力や駆動系の能力を考慮した場合に非常に困難なことである。
　上記課題に対し、本実施形態に係る超音波シール装置であれば、アンビルの凹み部分と包材段差部分との位置がずれた場合であっても、そのずれ量の許容値を大きくすることが可能で段差位置決めセンサを不要とし高速シールへの対応が可能となる。
　以上で、特定の実施形態を参照して本発明を説明したが、これら説明によって発明を限定することを意図するものではない。本発明の説明を参照することにより、当業者には、開示された実施形態の種々の変形例とともに本発明の別の実施形態も明らかである。従って、特許請求の範囲は、本発明の範囲及び要旨に含まれるこれらの変形例または実施形態も網羅すると解すべきである。
１・・・超音波発振器
２・・・コンバータ
３・・・ホーン
４・・・アンビル
５・・・筒状包材
６・・・包材段差部分
７・・・シールバー
１１・・・超音波発振器
１２・・・コンバータ
１３・・・ホーン
１４・・・アンビル
１５・・・筒状包材
１６・・・シールバー
２２・・・包材端部
２３・・・エッジプロテクトテープ
２４・・・包材端部
２５・・・包材段差部分
３０・・・非重なり部
３０ｂ・・・平坦部
３１～３３・・・重なり部
３１ａ～３３ａ・・・段差
３１ｂ～３３ｂ・・・凹部
３４～３７・・・テーパー形状の中心部

Claims (2)

  1. 　包材の両端部を重ね合せてシールした筒状包材の、前記両端部の重ね合わせによって形成された包材段差部分を横断する方向に、ホーンとアンビルとを用いて前記筒状包材をシールする液体用紙容器の超音波シール装置であって、
    　前記アンビルの前記包材段差部分が接触する部分に、前記筒状包材をシールする方向での前記包材段差部分の断面形状に合わせた凹部を有する凹型形状部を備え、
    　前記凹部の形状は、テーパー形状であることを特徴とする液体用紙容器の超音波シール装置。
  2. 　前記筒状包材の前記包材段差部分の内面側に、前記両端部を重ね合せてシールするエッジプロテクトテープを備え、
    　前記アンビルに備わる前記凹部の深さを、前記包材２枚が重なる第１の重なり部、前記包材２枚と前記エッジプロテクトテープとが重なる第２の重なり部、前記包材１枚と前記エッジプロテクトテープとが重なる第３の重なり部の各厚みに合わせたことを特徴とする請求項１に記載の液体用紙容器の超音波シール装置。
PCT/JP2014/006357 2013-12-20 2014-12-19 液体用紙容器の超音波シール装置 WO2015093061A1 (ja)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017038330A1 (ja) * 2015-08-31 2017-03-09 凸版印刷株式会社 超音波シールアンビル
US20220002017A1 (en) * 2018-11-06 2022-01-06 Shikoku Kakoki Co., Ltd. Filling packaging machine, content filling container, and manufacturing method therefor

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JPH04339753A (ja) * 1991-05-08 1992-11-26 Jujo Paper Co Ltd 紙容器内部の包装材料端部保護テープ
JP3004786U (ja) * 1994-05-31 1994-11-22 凸版印刷株式会社 液体容器の超音波シール装置

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* Cited by examiner, † Cited by third party
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JPH04339753A (ja) * 1991-05-08 1992-11-26 Jujo Paper Co Ltd 紙容器内部の包装材料端部保護テープ
JP3004786U (ja) * 1994-05-31 1994-11-22 凸版印刷株式会社 液体容器の超音波シール装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017038330A1 (ja) * 2015-08-31 2017-03-09 凸版印刷株式会社 超音波シールアンビル
CN107922070A (zh) * 2015-08-31 2018-04-17 凸版印刷株式会社 超声波密封砧座
CN107922070B (zh) * 2015-08-31 2020-10-09 凸版印刷株式会社 超声波密封砧座
US20220002017A1 (en) * 2018-11-06 2022-01-06 Shikoku Kakoki Co., Ltd. Filling packaging machine, content filling container, and manufacturing method therefor

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