WO1999029575A1 - Cylindrical package, and method and apparatus for producing the same - Google Patents

Cylindrical package, and method and apparatus for producing the same Download PDF

Info

Publication number
WO1999029575A1
WO1999029575A1 PCT/JP1998/005371 JP9805371W WO9929575A1 WO 1999029575 A1 WO1999029575 A1 WO 1999029575A1 JP 9805371 W JP9805371 W JP 9805371W WO 9929575 A1 WO9929575 A1 WO 9929575A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
vertical seal
flat
convergence
focusing
Prior art date
Application number
PCT/JP1998/005371
Other languages
French (fr)
Japanese (ja)
Inventor
Shingo Okada
Hiroomi Kanoh
Original Assignee
Kureha Chemical Industry Company, Limited
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 Kureha Chemical Industry Company, Limited filed Critical Kureha Chemical Industry Company, Limited
Publication of WO1999029575A1 publication Critical patent/WO1999029575A1/en

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Classifications

    • 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
    • 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
    • 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
    • B29C66/40—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
    • B29C66/73—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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83541—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws flying jaws, e.g. jaws mounted on crank mechanisms or following a hand over hand movement
    • B29C66/83543—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws flying jaws, e.g. jaws mounted on crank mechanisms or following a hand over hand movement cooperating flying jaws
    • 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
    • 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
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • 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
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C66/735—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 extensive physical properties of the parts to be joined
    • B29C66/7352—Thickness, e.g. very thin
    • 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
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table

Definitions

  • the present invention relates to a method for manufacturing a cylindrical film having a vertical seal portion, comprising: filling a content such as a processed food into a cylindrical body of the film; TECHNICAL FIELD
  • the present invention relates to a tubular package that is bundled, and the bundle is fused and sealed without having a metal clip, a method for producing the same, and a device for producing the same. Background art
  • the general form of a tubular package filled with processed food is that the film is supplied in the longitudinal direction, and the ⁇ parts on both sides in the width direction of the film are joined together to form a vertical seal (or “ Is formed to form a tubular body (continuous tubular body), and the inside of the tubular body is filled with contents. Then, at intervals in the longitudinal direction of the continuous tubular body (that is, at both ends of the tubular package), it is pressed so as to be in a flat state to separate the contents in the tubular body. This operation is performed (squeezing or dividing), and the flat portion is pressed by the focusing plate to be focused. Then, the convergence portion is ligated at two places by a wire clip formed of a metal such as aluminum, and at the convergence portion, the middle of the two ligature portions is cut to form a continuous cylindrical shape. The body is separated into individual tubular packages.
  • the above-mentioned package reacts to the metal detecting means in the quality control of the cylindrical package performed by the metal detection method, and causes inconvenience in metal detection as a foreign substance.
  • JP-A-59-26424, JP-A-59-26467, and JP-B-5-674966 disclose a film form. After the contents are filled into the formed continuous cylindrical body, the film is focused at the part where the contents have been removed, and the film at the focusing part is used as it is using ultrasonic welding means. A technique has been disclosed in which the material is melted and sealed without using a wire clip.
  • the pressure resistance of the sealing portion is not sufficient.
  • the heating step Due to an increase in the internal pressure of the cylindrical package, the package may not be able to maintain its tight seal. For example, a pinhole may be detected in an electrical continuity test.
  • Japanese Patent Publication No. Hei 5-674796 discloses that a constant pressure is applied to an ultrasonic horn and an anvil sandwiching a focusing portion of a film, so that the film of the focusing portion can be prevented.
  • a technique has been disclosed in which a contact pressure between a horn and an anvil is ensured and a film is welded at a sealing portion.
  • a seal with sufficient pressure resistance The stop cannot be formed constantly.
  • the inventors of the present invention have investigated the cause of the failure of the sealing portion to constantly provide sufficient pressure resistance to the sealing portion, and have found that the vertical seal for joining the edges of the filem. It was understood that it was caused by the position of the part in the focusing part. That is, conventionally, when the film is focused, the existence of the vertical seal portion is not taken into consideration, so that the position of the vertical seal portion within the film focus portion is random, and the position of the vertical seal portion is random. The orientation is irregular. For example, when the focusing portion is sandwiched between the ultrasonic horn and the anvil and heat is generated in the film of the focusing portion, the horn and the anvil may be disturbed. It was found that the thickness of the film sandwiched between them became uneven, and as a result, it was difficult for the film to be uniformly melted at the focusing portion.
  • a part of the film F may be used.
  • the convergence plate moves from the side facing the vertical seal portion S1 toward the vertical seal portion S1, and the film F is converged.
  • the vertical seal portion S 1 in the focusing portion 2 is more likely to appear on the surface facing the ultrasonic horn 4 or the anvil 5.
  • the vertical seal portion S 1 This would be Horn 4 or Anvil 5.
  • the pinching pressure on the entire film F sandwiched between the horn 4 and the anvil 5 acts non-uniformly, and the film F of the focusing section 2 is uniformly melted.
  • the pressure resistance of the sealing portion decreases, and the percentage of non-defective products in the sealed portion and the non-defective portion in the sealing portion decrease.
  • the present invention is to solve the above-mentioned conventional problem, and does not use a metal wire clip by focusing both ends of a cylindrical body and melting the film by ultrasonic waves or the like.
  • a sealing portion a cylindrical package body in which a film can be uniformly melted at a convergence portion so as to form a sealing portion having high pressure resistance, a method of manufacturing the same, and a method of manufacturing the same. It aims to provide manufacturing equipment.
  • the present invention relates to a tubular package comprising a tubular body of a film to be filled with a content, wherein the tubular body includes a part of a film extending in a longitudinal direction of the tubular body.
  • a vertical seal portion formed by joining the two members is provided, and the film converges at both ends in the longitudinal direction of the tubular body to form a converging portion.
  • a sealing portion is formed by welding the film at the focusing portion;
  • the film is folded to form a number of folded portions, one of the folded portions includes the vertical seal portion, and the folded portion including the vertical seal portion is the other. Focused so that it is sandwiched by the folds,
  • the sealing portion is a tubular package, and is welded by pressing the convergence portion in a direction in which the folding portion overlaps.
  • the sealing portion The film forming the seal is welded over the entire area of the sealing portion, and the vertical seal portion is It is preferable to be sandwiched between the folded portions at a position that does not appear on the surface of the sealing portion, since pinholes are less likely to occur and the yield of non-defective sealing portions is increased.
  • the cylindrical body extending in the longitudinal direction is filled with the contents, and the longitudinal seal portion joining the two parts of the film is filled with the contents, and the films at both ends in the longitudinal direction of the cylindrical body are converged.
  • a bundle including a vertical seal portion is formed, and the film is welded at the bundle to form a sealed portion.
  • the following items (a) and (b) are simultaneously satisfied. This is preferred.
  • a depression is formed along the direction parallel to the center axis of item (a).
  • Means for melting the film in the present invention is an ultrasonic welding means for sandwiching the film of the focusing portion with an ultrasonic horn and an anvil and generating heat in the film by ultrasonic waves, or A high-frequency electrode clamps the film at the focusing section, and high-frequency welding means that generates heat in the film by high-frequency dielectric heating, or a heating plate sandwiches the film at the focusing section and heats the plate.
  • the vertical seal portion is buried so as to be sandwiched between the folded portions of the film inside the focusing portion. Unevenness where the vertical seal is formed .
  • the vertical seal portion is located at the center in the width direction of the focusing portion.
  • the film of the focusing part is pressed almost uniformly while the vertical seal part is buried almost in the center of the focusing part. This film is melted.
  • the film at the converging portion is sufficiently and almost uniformly melted, and the vertical seal portion and its The films located before and after are welded, and the pressure resistance of the focusing portion increases.
  • the cylindrical body of the portion from which the content has been removed is squeezed from the direction facing the vertical seal portion to form a flat portion, and the vertical seal portion is formed at an intermediate portion in the width direction of the flat portion.
  • the flat portion is folded to form a converging portion thereafter.
  • this focusing portion is formed.
  • a pressing surface such as a horn and an anvil
  • a step of filling the inside of the tubular body with contents Pressing the cylindrical package filled with the content from the direction facing the vertical seal portion to form a flat portion except for the content of the portion, and converging force from both ends of the flat portion.
  • a plurality of folds are formed, one of the folds includes the vertical seal, and the fold including the vertical seal is sandwiched by the other folds.
  • a guide force is applied to the flat section from the flat side of the flat section so that the vertical seal section is located at the center of the collection section.
  • the apparatus for manufacturing a tubular package of the present invention includes:
  • Sealing means for joining the edges of the film to form a vertical seal in the longitudinal direction of the cylindrical body of the film; means for filling the inside of the cylindrical body with contents; Squeezing means for squeezing the cylindrical body from a direction facing the vertical seal portion to remove contents in the cylindrical body to form a flat portion; and converging means for converging the flat portion to form a converging portion.
  • Welding means for welding the film of the convergence part at two places, and cutting means for cutting the convergence part between the two welded parts,
  • the converging means has a concave portion for applying a converging force from both ends of the flat portion to the flat portion, and the bottom of the concave portion is a plane substantially orthogonal to the flat surface of the flat portion.
  • the welding means includes a pressure welding member that welds the film of the convergence portion at two places while pressing the convergence portion from the overlapping direction of the films folded at the convergence portion. It is characterized by being provided.
  • the opening width of the opening of the concave portion of the focusing means is equal to or smaller than the width of the flat bottom.
  • the converging plate when the bottom of the concave portion formed in the converging plate has a planar shape, and preferably, the opening width of the concave portion is smaller than the width dimension of the bottom portion, the converging plate has When the flat portion of the cylindrical body is pressed with the, the film is folded within a predetermined width, and pinholes are less likely to be generated when the film is welded by the welding member.
  • the pressure welding means comprises an ultrasonic horn and a preheated albin.
  • FIG. 1 (A) is a front view of a vertical continuous filling and packaging apparatus used for manufacturing the tubular package of the present invention
  • (B) is a partial side view of (A).
  • FIG. 2 is a perspective view showing a film forming section and a vertical seal forming section of the vertical continuous filling and packaging apparatus shown in FIG. 1 (A).
  • FIG. 3 is a partial perspective view showing a state where a flat portion is formed in a tubular body of the film.
  • FIG. 4 is a partial perspective view showing a state where the flat portion is focused by a focusing plate.
  • Fig. 5 (A) is a cross-sectional view of the flat part, and (B) is a state where the focusing part is ultrasonically welded. .
  • FIG. 9 is a sectional view showing one embodiment.
  • FIG. 6 is a front view showing a tubular package of the present invention.
  • FIG. 7 is a partially enlarged perspective view showing a sealed portion of the tubular package.
  • FIG. 8 is a sectional view showing another structure of the vertical seal portion.
  • Fig. 9 (A) is a cross-sectional view showing a conventional flat part, and (B) is a cross-sectional view showing a state where a conventional focusing part is ultrasonically welded.
  • FIGS. 10 (A), (B), and (C) are plan views showing types of focusing plates suitable for the present invention, and
  • FIG. 10 (D) is a plan view showing a focusing plate of a comparative example.
  • FIGS. 11 (A) and (C) are enlarged plan views showing the types of the concave portions of the focusing plate shown in FIGS. 10 (A) and (B), respectively, and (B) and (D) are FIGS.
  • FIGS. 3A and 3B are cross-sectional views of a sealed portion that is focused and welded at the concave portions illustrated in FIGS. Fig. 12
  • (A) is an enlarged plan view showing the concave portion of the focusing plate shown in Fig. 10 (C)
  • (B) is a bundle which is focused and welded at the concave portion shown in Fig. 12 (A).
  • Sectional view of the sealing portion, (C) is an enlarged plan view showing the concave portion of the focusing plate shown in FIG.
  • FIG. 4 is a cross-sectional view of a sealing portion that is focused and welded in a recess.
  • FIG. 6 is a front view of a tubular package of the present invention
  • FIG. 7 is a partially enlarged perspective view showing a sealing portion of the tubular package.
  • a part F a and a part F b in a width direction of a film F having a high oxygen gas barrier property such as a film of vinylidene chloride resin are overlapped, and Films F are welded to each other by high-frequency dielectric heating using a high-frequency electrode at a substantially central portion of the overlap width of F a and F b, thereby forming a vertical seal portion S 1.
  • the vertical seal portion S1 extends along the longitudinal direction of the tubular body.
  • Both ends in the longitudinal direction of the cylindrical body formed of the film F are focused to form a focusing portion 2, and the film of the focusing portion 2 is formed by ultrasonic welding means. Heat is generated, and a sealing portion 3 is formed in which the films are welded to each other.
  • the sealing portion 3 is formed only by welding the film F, and does not include a conventional ligating means using a metal wire clip.
  • a structure in which the sealing portion 3 is further tightened by a clip other than metal formed of a plastic material or the like may be used.
  • the tubular body of the film F from which the contents have been removed is flattened and crushed.
  • a flat portion Fr is formed, and the flat portion Fr is regularly folded.
  • 5 (A) and 5 (B) show the process of forming the focusing section 2 in more detail.
  • the flat portion Fr is formed by removing the contents inside the cylindrical body formed of the film F.
  • the flat portion Fr is formed in the flat portion Fr.
  • the vertical seal portion S 1 is positioned at the middle portion in the width direction, preferably at the center in the width direction. From both ends of the flat portion Fr, the converging force P, P by the convergence plate is given to converge the flat portion Fr, and at this time, the flat portion Fr may be converged as necessary.
  • the guides G a, G a, G b, and G b are provided alternately, and as a result, as shown in FIG. 5 (B), the flat portion Fr is folded regularly, and It is focused so that the fold is formed.
  • the vertical seal portion S1 is sandwiched between the films F, and the vertical seal portion S1 is located inside the focusing portion 2.
  • the folding surface of the focusing portion 2 is in the Y direction, and the film at the location where the vertical seal portion S1 is formed, that is, the surface F of the film that is continuous on both sides of the vertical seal portion S1. s and Fs are oriented in the same direction as the folding surface to form one folding portion. Therefore, in the converging section 2, the vertical seal section S1 is located substantially at the center in the folding direction (X direction) due to the folding of the film, and converges in the folding surface direction (Y direction). When viewed in the width direction of the portion 2, the vertical seal portion S1 is located substantially at the center in the width direction.
  • the focusing portion 2 is welded by the ultrasonic horn 4 and the anvil 5, a vertical seal is applied to the pressing surface 4a of the horn 4 and the pressing surface 5a of the anvil 5.
  • the film faces F s and F s at the point where the portion S 1 is formed are parallel to each other, and the film folded at the focusing portion 2 is viewed from the overlapping direction.
  • the film F is sandwiched between the pressing surface 4a and the pressing surface 5a, an ultrasonic wave is applied to the film, and the film F in the focusing unit 2 is melted.
  • the vertical seal portion S1 is located inside the focusing portion 2, the vertical seal portion S1 is sandwiched between the folded portions of the film, and the vertical seal portion S1 is located between the folded portions.
  • the pressurizing surfaces 4 a, 5 a parallel to the surface F s, F s of the filem at the location where the vertical seal portion S 1 is formed, which is located substantially at the center of the focusing portion 2, and the vertical seal portion S 1 is welded together with the films located before and after it.
  • a plurality of film folding portions are formed before and after the left and right sides of the welded mass of the vertical seal portion S1 and the film edges Fa and Fb extending to the left and right sides thereof. Since they are positioned evenly, the pressing force of the pressing surfaces 4 a and 5 a acts evenly on the film of the focusing unit 2. As described above, since the pressing force acts uniformly on the focusing unit 2, .
  • the bias of the applied pressure is less likely to occur.
  • the film F in the focusing section 2 is uniformly melted including the welded mass of the vertical seal section S1, and as a result, the welding quality in the sealing section 3 is improved, and pinholes and the like are reduced. It is difficult to occur.
  • FIG. 1 (A) is a front view showing a schematic structure of a vertical continuous filling and packaging apparatus for producing a tubular package
  • FIG. 1 (B) is a partial side view of FIG. 1 (A).
  • FIG. 2 is a partial perspective view showing a film forming section of the vertical continuous filling and packaging apparatus.
  • the film F is continuously withdrawn from the web 10 shown in FIG. 1 (A), guided by the guide rolls 11a and 11b, and guided to the forming member 12.
  • the formed member 12 is called a forming plate.
  • the molded member 12 is formed into a tubular shape from a metal plate, the edges of the molded member 12 are overlapped with each other in the longitudinal direction, and the upper edge 12 a It is inclined.
  • the film F that has passed 1 lb of the guide roll is turned inward from the upper portion 12 a of the forming member 12 and formed into a cylindrical shape.
  • the lower portion F a of the film F And F b are guided between the upper portions 12 b and 12 c of the molded member 12 and overlap each other.
  • high-frequency electrodes 13a and 13b are provided so as to face each other, and a substantially central portion of an overlapping portion between the edge portion Fa and the ⁇ portion Fb is formed as described above.
  • the high-frequency electrodes 13a and 13b are sandwiched by pressure and welded to form a vertical seal portion S1, whereby a cylindrical body is formed continuously.
  • the continuously rotating feeder is located below the high-frequency electrodes 13a and 13b.
  • the cylindrical body provided with the rollers 14a and 14b and having the longitudinal seal portion S1 is sandwiched between the feed rollers 14a and 14b, and the rotational force of the feed roller is reduced. It is sent downward at a more constant speed.
  • the cylindrical body may be intermittently fed by the feed rollers 14a and 14b.
  • a filling nozzle 15 is inserted into the center of the molding member 12 from above, and a filling pump 16 is provided above the filling nozzle 15.
  • the cylindrical member of the film F which is inverted at the upper edge of the molded member 12 and formed into a cylindrical shape, and in which the longitudinal seal portion S1 is formed by the high-frequency electrodes 13a and 13b. From the filling pump 16 and the filling nozzle 15, contents 17 such as processed food are continuously filled in a constant amount per unit time.
  • b is driven to intermittently repeat pressing and separating.
  • the ironing rollers 18a and 18b the cylindrical body of the film F continuously fed downward is pressed at a constant interval.
  • the contents 1 ⁇ inside the cylindrical body are partially removed, and the films F are pressed together.
  • a flat portion Fr is formed.
  • the ironing rollers 18a and 18b press the cylindrical body from the direction facing the vertical seal portion S1 as shown in FIG.
  • the vertical seal portion S1 is substantially equal to the width W. Centrally located.
  • the convergence / sealing mechanism 20 is driven to move up and down in synchronization with the lowering speed of the tubular body, and presses and flattens the flat portion Fr during the lowering operation.
  • the convergence section 2 is formed, the convergence section 2 is welded using ultrasonic waves, and the convergence section 2 is further cut.
  • each operation such as focusing may be performed by the focusing / sealing mechanism 20. .
  • the convergence / sealing mechanism 20 is provided with convergence plates 21a and 2lb as convergence means provided at intervals in the vertical direction, and convergence as the same convergence means as opposed thereto. Plates 2 2 a, 2 2 b, ultrasonic horn 4 located between upper focusing plate 21 a and lower focusing plate 2 1 b, upper focusing plate 2 2 a and lower focusing plate 2 2 b, and a cutting blade 23 located in the middle of the anvil 5. Further, the convergence-sealing mechanism 20 includes a drive mechanism for operating the convergence plates 21a and 21b and the convergence plates 22a and 22b in a direction in which they are pressed against each other in synchronization with the elevating operation. A pressing mechanism for pressing the horn 4 and the anvil 5 against each other and a mechanism for advancing the cutting blade 23 are provided.
  • the contents 17 in the film cylinder are partially removed by the clamping force between the ironing rollers 18a and 18r. Then, the flat portion Fr is formed.
  • the flat plates Fr and the converging plates 21 a and 21 b and the converging plate 2 2a and 2 2b are driven in directions approaching each other, and the flat portion Fr is focused by receiving focusing forces P and P from both sides in the width direction.
  • the guide forces Gb, Gb are given to the guide forces Ga, Ga from alternate positions. This guide force is synchronized with the focusing force P, P applied to the flat portion Fr by the focusing plates 21a, 21b and the focusing plates 22a, 22b. The guide projection or the guide plate is approached from the side of the flat portion Fr.
  • the flat portion Fr is formed by the guides Ga and Gb.
  • the plurality of folded portions are formed by being regularly folded, and the vertical seal portion S 1 is sandwiched between the folded portions of the film in the focusing portion 2 as described above.
  • the vertical seal portion S 1 is located substantially at the center in the X direction and the Y direction in the focusing portion 2.
  • the ultrasonic horn 4 and the anvil 5 approach, and the two points of the focusing section 2 are ultrasonically welded.
  • the surface F s of the film at the portion where the vertical seal portion S 1 is formed in the converging portion 2 (the surface F s which is one of the folded portions including the vertical seal portion S 1) Is substantially parallel to the pressing surface 4 a of the horn 4 and the pressing surface 5 a of the anvil 5. Therefore, as described above, in the focusing portion 2, the vertical seal portion S1 and the folded portions of the front and rear films are uniformly pressed together, and ultrasonic waves are applied. It is preferable to preheat the fin 4 or the anvil 5 as necessary in order to further ensure the ultrasonic welding.
  • the horn 4 and the anvil 5 approach each other after the flat portion Fr is focused by the focusing plate. Therefore, the horn 4 and the anvil 5 have a cantilever structure in which the base ends are supported, and the pressing surfaces 4a and 5a are separated from the horn and the support base of the anvil. Therefore, due to the pressing surfaces 4a and 5a When the film is pressed, the parallel state of the pressing surface 4a and the pressing surface 5a tends to collapse. That is, if the thickness of the folded film at the focusing portion is not uniform or the thickness of the film at the focusing portion is uneven, the pressing surfaces 4a and 5a are pressed in parallel. The horn and anvil tend to tilt slightly. In such a state, it is difficult to uniformly pressurize the film in the focusing section.
  • the vertical seal portion S1 is located substantially at the center of the focusing portion 2, and the vertical seal portion S1 is folded. Since the pressing portion 4a of the horn 4 and the pressing surface 5a of the anvil 5 can easily press the focusing portion 2 in a stable state because the pressing portion 4 is sandwiched between the folded portions, the focusing portion 2 is easily moved in the Y direction. The pressure is uniformly applied at each of the positions, and is uniformly melted, so that the sealing portion 3 is formed.
  • a flat portion Fr is formed, and as shown in FIG. 5 (B), the flat portion Fr is folded.
  • a portion 6a of the film on which the vertical seal portion S1 is formed is focused along a surface (a surface including the Y axis) from the vertical seal portion S1 toward the center axis of the package. It is drawn inward of the department.
  • the film at the portion where the vertical seal portion S1 is formed at the root of the sealing portion 3 is formed.
  • a recessed portion 6 is formed, which penetrates in the surface direction including the Y axis.
  • the convergence portion 2 is cut by the cutting blade 23 between the sealing portions 3 and 3 which are formed at an interval above and below, as shown in FIG. Separated into individual tubular packages.
  • recesses 25 and 26 are formed on opposite sides of each of the focusing plates 21a and 2lb and the focusing plates 22a and 22b, respectively.
  • the film of the flat portion Fr is sandwiched between the concave portions 25 and 26. The film is pinched, so that the film is focused.
  • the flat portion Fr is folded and folded as regularly as possible, and the portion where the vertical seal portion S 1 is formed is the focusing portion. It is preferable that the film is sandwiched between the front and rear at the. Moreover, it is preferable that the vertical seal portion S 1 is located at the center of the focusing portion 2 in the width direction (Y direction).
  • Fig. 10 (A) (B) (C) (D) What should I do?
  • Fig. 10D shows the planar shape of the concave portion 25 formed in the focusing plates 21a and 21b by type.
  • Fig. 10 (D) is a comparative example, and Figs. 10 (A) and 10 (B) (C) shows the shape of the concave portion suitable for the present invention, and FIGS. 10 (A) and (B) show the most preferable shape of the concave portion.
  • the concave portions 26, 26 provided on the converging plates 22a, 22b on the opposite side are symmetrical with the concave portions 25 shown in FIG.
  • FIG. 12 (C) shows the planar shape of the concave portion 25 of the comparative example shown in FIG. 10 (D).
  • the bottom 25a of the recess 25 has an arc shape.
  • This comparative example is suitable for film focusing when ligating with a metal clip, but is not suitable for film focusing in the present invention. .
  • the bottom portion 25a has an arc shape.
  • the end of the flat portion Fr is not stationary and slides without being fixed, so that it is impossible to produce regularity in the folding of the film. 2
  • the cross-sectional area of the central welded portion (i) is small, and the protruding portions (ii) of the film are formed on both sides of the welded portion (i).
  • the protruding portion (ii) of the film has a lower welding strength than the welded portion (i), and pinholes and the like easily occur in the film protruding from the portion (ii).
  • FIG. 12 (A) shows the concave portion 25 of the focusing plates 21 a and 21 b shown in FIG. 10 (C).
  • the bottom 25 a of the concave portion 25 is a flat portion orthogonal to the flat surface of the flat portion Fr.
  • FIG. 12 (B) shows the cross-sectional shape of the sealing portion 3 which is focused and welded by the concave portion 25.
  • the cross-sectional area of the welded portion (i) that is pressed and welded by the horn and the anvil is welded. Is larger than that of Fig. 12 (D), and the film protruding into the protruding part (ii) is shorter than that of Fig. 12 (D). Therefore, the probability that a pinhole is formed at the protruding portion (ii) is lower than that in FIGS. 12 (C) and (D), and the good sealing rate can be increased.
  • the recess 25 shown in Fig. 12 (A) has a flat surface at the bottom 25a.
  • the width must be small.
  • the cross-sectional area of the welded portion (i) can be made sufficiently large. .
  • FIGS. 11 (A) and 11 (C) show the most preferable shapes of the concave portions 25. FIG. This is the same as shown in FIGS. 10 (A) and (B).
  • the bottom portion 25a is a flat portion orthogonal to the flat surface of the flat portion Fr. Also, in FIG. 11 (A), the opening width of the opening 25 b of the recess 25 is the same as the width dimension of the bottom 25 a, and in FIG. 11 (C), the opening 25 The opening width of b is narrower than the width of the bottom 25a.
  • Fig. 11 (B) shows a cross section of the sealing portion 3 to which the film converged in the concave portion 25 of Fig. 11 (A) is welded, and the concave portion 25 of Fig. 11 (C).
  • Fig. 11 (D) shows a cross section of the sealing portion 3 where the film focused in the step is welded.
  • the film converged in the concave portion 25 is planar because the width of the flat portion of the bottom portion 25a is large.
  • the area between the seals 3 is enlarged, and the film is easily folded regularly.
  • the cross section of the sealing part 3 shown in Figs. 11 (B) and (D) shows good welding.
  • the area of the welded portion (i) to be formed becomes very large.
  • the film is sufficiently melted and welded at the portions (iii) on both sides of the welded portion (i). As a result, the amount of film protruding from the welded portion is reduced, and the non-defective rate of the film sealing portion is increased.
  • a so-called film F in which the inner surface of one edge F a is planarly overlapped with the outer surface of the other F portion F b.
  • a vertical seal portion S1 is formed in the state of the envelope-like backing, but as shown in Fig. 8, the inner surfaces of the film face each other.
  • the longitudinal seal portion S2 may be formed in a state of being so-called a palm-backed state in which the high-frequency welding is performed in one state, and the upper portions Fa and Fb protrude outside the cylindrical body.
  • tubular package As an example of the present invention, the following tubular package was manufactured.
  • a vinylidene chloride copolymer film (Kureha Chemical Industry Co., Ltd. product name “Clehalon”) with a total film thickness of 80 zm was used.
  • the vertical continuous filling and packaging machine “KAP500 type” manufactured by Kureha Chemical Industry Co., Ltd. has been improved to produce the cylindrical package described in the above embodiment.
  • the vertical seal portion S 1 was formed by applying high frequency welding to the envelope portions of the lower portions Fa and Fb of the film F.
  • the mold shown in Fig. 10 (A) was used for the focusing part.
  • the sealing part 3 is formed by ultrasonic welding, and a vibrator made of a sintered zirconia lead titanate powder is used as an ultrasonic welder for generating ultrasonic vibrations at a frequency of 40 kHz.
  • Ultrasonic welding was performed under the conditions of z and horn 4 with a longitudinal vibration amplitude of 1 Oizm.
  • a tubular package was manufactured using 21 films.
  • the flat portion Fr is formed by using a focusing plate 21a, 21b, 22a, 22b provided with U-shaped concave portions 25, 26 shown in Fig. 10 (D). By folding, the sealed portions shown in FIGS. 12 (C) and (D) were obtained.
  • cylindrical packagings of the example and the comparative example containing saturated saline was prepared, and the cylindrical packagings of the example and the comparative example containing the undiluted solution of the rice cake-shaped confectionery were prepared. 100 bodies were prepared for each.
  • the non-defective sealing part 3 was immersed, one of the positive and negative electrodes of the conduction tester was stabbed into the cylindrical package, and the other was stabbed into the saturated saline solution in the container, and the electrical resistance was measured. If the measured electrical resistance was 300 k ⁇ or more, no pinholes were formed in the sealing part 3, the non-defective sealing part was determined, and the ratio of the non-defective sealing part was defined as the non-defective sealing rate.
  • Each of the cylindrical packagings of the example and the comparative example containing saturated saline was prepared, and the cylindrical packagings of the example and the comparative example containing the undiluted solution of the rice cake-shaped confectionery were prepared. I prepared 100 body each.
  • Non-defective part of sealed part 1 0 0%
  • Non-defective part of sealing part 8 2%
  • the sealing portion when the film is welded at the converging portions at both ends of the cylindrical package to form the sealing portion, even if the vertical seal portion is present, The applied pressure is not uneven, the sealing portion can be welded uniformly, and poor sealing due to bin holes or breakage is unlikely to occur. Therefore, it is useful in a film package filled with contents.

Abstract

Conventionally, when a constriction portion of a cylindrical package of a film is sealed by fusing alone without using any metal clip, a sufficient strength cannot be achieved. Therefore, in the invention, after filling a cylindrical body with a liquid or the like, a part of the content is removed, and a flat portion (Fr) is formed by pinching a portion of the body from the side opposed to a longitudinal seal portion (S1). When constricting forces P, P are applied to the flat portion (Fr) from both sides, the flat portion (Fr) is regularly folded, and the longitudinal seal portion (S1) is positioned at the center of the constriction portion and sandwiched by the film in the lateral direction. When the constriction portion is pressed by the longitudinal seal portion and a press surface parallel to the longitudinal seal portion, and fused by ultrasonic waves, a seal portion the film of which is uniformly pressed is formed. As a result, defective seal due to, e.g., a pin-hole or breakage hardly occurs.

Description

T P98/05371  T P98 / 05371
明 細 書 筒状包装体、 その製造方法およびその製造装置 技術分野 Description: Cylindrical package, manufacturing method and manufacturing apparatus
本発明は、 縦シール部を有して筒状に形成されたフ ィ ルムの筒状 体の内部に、 加工食品などの内容物が充填された後に、 前記筒状体 の長手方向の両端部が集束され、 この集束部が融着されて金属製の ク リ ッ プを有する こ とな く 封止された筒状包装体、 その製造方法お よびその製造装置に関する。 背景技術  The present invention relates to a method for manufacturing a cylindrical film having a vertical seal portion, comprising: filling a content such as a processed food into a cylindrical body of the film; TECHNICAL FIELD The present invention relates to a tubular package that is bundled, and the bundle is fused and sealed without having a metal clip, a method for producing the same, and a device for producing the same. Background art
加工食品が充填される筒状包装体の一般的な形態は、 フ ィ ルムが 長手方向へ供給され、 フ ィ ルム の幅方向両側の緣部どう しが接合さ れて縦シール部 （または 「背貼 り」 と称される） が形成されて筒状 体 （連続した筒状体） が形成され、 この筒状体の内部に内容物が充 填される。 その後に、 連続した筒状体の長手方向において間隔をあ けて （すなわち、 筒状包装体の両端部において）、 偏平状態となるよ う に押圧されて筒状体の中の内容物を分ける （ し ごく 、 または分肉 する） 操作を行ない、 こ の偏平部が集束板によ り押圧されて集束さ せられる。 そしてこの集束部がアルミ ニウムなどの金属で形成され たワイ ヤク リ ップによ り二力所で結紮され、 前記集束部において二 力所の結紮部の中間が切断されて、 連続した筒状体が個々 の筒状包 装体に分離される。  The general form of a tubular package filled with processed food is that the film is supplied in the longitudinal direction, and the 緣 parts on both sides in the width direction of the film are joined together to form a vertical seal (or “ Is formed to form a tubular body (continuous tubular body), and the inside of the tubular body is filled with contents. Then, at intervals in the longitudinal direction of the continuous tubular body (that is, at both ends of the tubular package), it is pressed so as to be in a flat state to separate the contents in the tubular body. This operation is performed (squeezing or dividing), and the flat portion is pressed by the focusing plate to be focused. Then, the convergence portion is ligated at two places by a wire clip formed of a metal such as aluminum, and at the convergence portion, the middle of the two ligature portions is cut to form a continuous cylindrical shape. The body is separated into individual tubular packages.
しかし、 アルミニウムなどの金属製のワイ ヤク リ ッ プで結紮され た包装体は、 金属探知方式で行なわれる筒状包装体の品質管理にお いて前記ク リ ッ プが金属探知手段に反応し、 異物と しての金属検知 に不都合を生じる。 However, it is ligated with a metal wire clip such as aluminum. The above-mentioned package reacts to the metal detecting means in the quality control of the cylindrical package performed by the metal detection method, and causes inconvenience in metal detection as a foreign substance.
また、 筒状包装体を製造する工程において、 フ ィ ルムの集束部を ワイ ヤク リ ッ プで結紮する作業を行う と、 ワイ ヤク リ ッ プをプレス する ときに金属粉が発生し、 食品の包装工程の環境と して好ま し く ない。  Also, in the process of manufacturing the tubular package, if the tying portion of the film is ligated with a wire clip, metal powder is generated when the wire clip is pressed, and the food product is produced. Unfavorable as packaging environment.
そこで、 特開昭 5 9 — 2 6 4 2 4 号公報、 特開昭 5 9 — 2 6 4 6 7 号公報、 および特公平 5 — 6 7 4 9 6 号公報には、 フ ィ ルムで形 成された連続する筒状体の内部に内容物が充填された後に、 内容物 が排除された部分でフィ ルムを集束させ、 そのまま超音波溶着手段 などを用いて、 集束部でのフ ィ ルムを溶融させ、 ワイ ヤク リ ッ プを 用いないで封止する技術が開示されている。  Therefore, JP-A-59-26424, JP-A-59-26467, and JP-B-5-674966 disclose a film form. After the contents are filled into the formed continuous cylindrical body, the film is focused at the part where the contents have been removed, and the film at the focusing part is used as it is using ultrasonic welding means. A technique has been disclosed in which the material is melted and sealed without using a wire clip.
しか し、 前記のよう にフ ィ ルムを集束させて超音波などでフ ィ ル ムを溶融させて封止した筒状包装体では、 前記封止部の耐圧強度が 十分ではない。 特に、 筒状体の両端部が前記のよ う に封止された後 に、 ボイ ル工程、 レ トル ト工程、 あるいは水蒸気による蒸し工程な どの加熱工程が必要となる製品では、 加熱工程での筒状包装体の内 部圧力の上昇によ り 、 包装体の密封を保てない こ とがあ り 、 例えば 電気導通試験でピンホールと して検知されることがある。  However, in the case of the cylindrical package in which the film is converged as described above, and the film is melted and sealed with ultrasonic waves or the like, the pressure resistance of the sealing portion is not sufficient. In particular, for products that require a heating step such as a boil step, a retort step, or a steaming step with steam after both ends of the cylindrical body are sealed as described above, the heating step Due to an increase in the internal pressure of the cylindrical package, the package may not be able to maintain its tight seal. For example, a pinhole may be detected in an electrical continuity test.
例えば、 前記特公平 5 — 6 7 4 9 6 号公報には、 フ ィ ルムの集束 部を挟む超音波ホーンおよびア ン ビルに一定圧を印加する こ とによ り、 集束部のフィ ルムに対するホーンとアンビルの接触圧を確保し、 封止部でフ ィ ルムを溶着させる技術が開示されている。 しかし、 ホ ーンとア ンビルの接圧の管理だけでは、 十分な耐圧強度を有する封 止部を定常的に形成できない。 For example, Japanese Patent Publication No. Hei 5-674796 discloses that a constant pressure is applied to an ultrasonic horn and an anvil sandwiching a focusing portion of a film, so that the film of the focusing portion can be prevented. A technique has been disclosed in which a contact pressure between a horn and an anvil is ensured and a film is welded at a sealing portion. However, only by controlling the contact pressure between the horn and the anvil, a seal with sufficient pressure resistance The stop cannot be formed constantly.
本発明の発明者 ら は、 封止部が定常的に十分な耐圧強度を封止部 に与え られな い原因 を調べた と こ ろ 、 フ イ リレム の縁部 ど う し を接合 する縦シール部の集束部における位置に起因 し て いる こ と を理解 し た。 すなわち 、 従来は、 フ ィ ルム を集束する 際に、 縦シール部の存 在が考慮さ れていな いため、 フ ィ ルム の集束部内での縦シール部の 位置がラ ンダムであ り 、 またその向きが不規則であ り 、 例えば超音 波ホー ン と ア ン ビル と で集束部を挟圧 し 、 集束部の フ ィ ルム に発熱 を生 じ させた と き に、 ホー ン と ア ン ビル と に挟まれる フ ィ ルム の厚 みが不均一にな り 、 その結果、 集束部にお いて フ ィ ルムが均一に溶 融されに く い こ とが解っ た。  The inventors of the present invention have investigated the cause of the failure of the sealing portion to constantly provide sufficient pressure resistance to the sealing portion, and have found that the vertical seal for joining the edges of the filem. It was understood that it was caused by the position of the part in the focusing part. That is, conventionally, when the film is focused, the existence of the vertical seal portion is not taken into consideration, so that the position of the vertical seal portion within the film focus portion is random, and the position of the vertical seal portion is random. The orientation is irregular. For example, when the focusing portion is sandwiched between the ultrasonic horn and the anvil and heat is generated in the film of the focusing portion, the horn and the anvil may be disturbed. It was found that the thickness of the film sandwiched between them became uneven, and as a result, it was difficult for the film to be uniformly melted at the focusing portion.
また、 前記特開昭 5 9 - 2 6 4 2 4 号公報および前記特開昭 5 9 - 2 6 4 6 7 号公報に記載さ れてい る よ う に、 フ ィ ルム F の緣部 ど う し を接合する縦シール部 S 1 を形成 し た後に、 前記縦シール部 S 1 に対面する側か ら 、 縦シール部 S 1 に向かっ て集束板が移動して、 フ ィ ルム F が集束さ れる もの （図 9 ( A ) ( B ) 参照） では、 集束部 2 にお いて縦シール部 S 1 が、 超音波ホー ン 4 ま たはア ン ビル 5 に 向 く 表面に現れやす く なる。 こ の状態の集束部 2 に対 し 、 超音波ホ — ン 4 と ア ン ヒル 5 とで前記集束板によ る集束方向 と 同 じ方向か ら 挟圧する と 、 縦シール部 S 1 が超音波ホー ン 4 ま たはア ン ビル 5 に 当たる こ と にな る 。 その結果、 ホー ン 4 と ア ン ビル 5 と の間に挟ま れる フ ィ ルム F全体に対する挟圧力が不均一に作用する こ と にな り 、 集束部 2 の フ ィ ルム F が均一に溶融さ れに く く な り 、 封止部の耐圧 強度が小さ く な り 、 密封良品率および封止部良品率が低下する。  Further, as described in the above-mentioned JP-A-59-26424 and JP-A-59-26467, a part of the film F may be used. After forming the vertical seal portion S1 for joining the plates, the convergence plate moves from the side facing the vertical seal portion S1 toward the vertical seal portion S1, and the film F is converged. In the case of the object (see FIGS. 9 (A) and 9 (B)), the vertical seal portion S 1 in the focusing portion 2 is more likely to appear on the surface facing the ultrasonic horn 4 or the anvil 5. When the ultrasonic horn 4 and the hill 5 pinch the focusing portion 2 in this state from the same direction as the focusing direction by the focusing plate, the vertical seal portion S 1 This would be Horn 4 or Anvil 5. As a result, the pinching pressure on the entire film F sandwiched between the horn 4 and the anvil 5 acts non-uniformly, and the film F of the focusing section 2 is uniformly melted. As a result, the pressure resistance of the sealing portion decreases, and the percentage of non-defective products in the sealed portion and the non-defective portion in the sealing portion decrease.
以上か ら 、 従来の金属製の ワ イ ヤ ク リ ッ プを用 いず、 集束部での . From the above, the conventional metal wire clip was not used, and the .
4 - フィ ルムを溶融させて封止部を形成した筒状包装体では、 密封良品 率が低下していた。 発明の開示  4-In the case of a cylindrical package formed by melting a film to form a sealed part, the rate of good sealed products was reduced. Disclosure of the invention
本発明は上記従来の課題を解決する ものであ り 、 筒状体の両端部 を集束させて、 超音波などによ り フ ィ ルムを溶融させて、 金属製の ワイヤク リ ップを用いない封止部を形成する際に、 集束部において、 フ ィ ルムを均一に溶融できるよ う に して、 耐圧強度の高い封止部を 形成できるよ う に した筒状包装体、 その製造方法および製造装置を 提供する ことを目的と している。  The present invention is to solve the above-mentioned conventional problem, and does not use a metal wire clip by focusing both ends of a cylindrical body and melting the film by ultrasonic waves or the like. When forming a sealing portion, a cylindrical package body in which a film can be uniformly melted at a convergence portion so as to form a sealing portion having high pressure resistance, a method of manufacturing the same, and a method of manufacturing the same. It aims to provide manufacturing equipment.
本発明は、 内容物が充填される フ ィ ルムの筒状体か らなる筒状包 装体であって、 前記筒状体には前記筒状体の長手方向へ延びる フ ィ ルムの緣部どう しを接合して形成された縦シール部が設けられ、 前 記筒状体の長手方向の両端部で前記フ ィ ルムが集束して集束部を形 成してお り 、 この集束部は縦シール部を含んでお り 、 前記集束部で はフィ ルムが溶着されて封止部が形成され、  The present invention relates to a tubular package comprising a tubular body of a film to be filled with a content, wherein the tubular body includes a part of a film extending in a longitudinal direction of the tubular body. A vertical seal portion formed by joining the two members is provided, and the film converges at both ends in the longitudinal direction of the tubular body to form a converging portion. A sealing portion is formed by welding the film at the focusing portion;
前記集束部ではフ ィ ルムが折り畳まれて多数の折 り畳み部が形成 され、 前記折り畳み部の一つは前記縦シール部を含んでお り 、 この 縦シール部を含んだ折り畳み部は他の折り 畳み部によって挟まれる よう にして集束しており、  At the focusing portion, the film is folded to form a number of folded portions, one of the folded portions includes the vertical seal portion, and the folded portion including the vertical seal portion is the other. Focused so that it is sandwiched by the folds,
前記封止部は、 前記折 り畳み部の重な り 方向において、 前記集束 部を挟圧して溶着されている こ と を特徴とする 、 筒状包装体である この場合に、 前記封止部を形成する フ ィ ルムは、 封止部の全領域 において溶着されている こ と、 さ ら に前記縦シール部は、 前記封止 部の表面に現れない位置で折り 畳み部間に挟まれている ことが、 ピ ンホールを生じにく く し、 封止部良品率を高くする上で好ましい。 または、 フィ ルムの緣部どう しを接合する縦シール部が長手方向 に延びる筒状体に内容物が充填されてお り 、 前記筒状体の長手方向 の両端部のフィ ルムが集束して縦シール部を含んだ集束部を形成し、 この集束部でフィ ルムが溶着されて封止部が形成された筒状包装体 において、 次の項目 （ a ) 及び項目 （ b ) を同時に満たすこ と こ と が好ましい。 The sealing portion is a tubular package, and is welded by pressing the convergence portion in a direction in which the folding portion overlaps. In this case, the sealing portion The film forming the seal is welded over the entire area of the sealing portion, and the vertical seal portion is It is preferable to be sandwiched between the folded portions at a position that does not appear on the surface of the sealing portion, since pinholes are less likely to occur and the yield of non-defective sealing portions is increased. Alternatively, the cylindrical body extending in the longitudinal direction is filled with the contents, and the longitudinal seal portion joining the two parts of the film is filled with the contents, and the films at both ends in the longitudinal direction of the cylindrical body are converged. A bundle including a vertical seal portion is formed, and the film is welded at the bundle to form a sealed portion. In the cylindrical package, the following items (a) and (b) are simultaneously satisfied. This is preferred.
( a ) 集束位置にあ り筒状体の長手方向に直角な断面と平行な 面にあって、 前記集束位置の断面と縦シール部との交点から前記断 面上の筒状体中心軸への方向の実質的に直角方向に折り畳まれて溶 着される前記封止部の内容物根元にあって、  (a) At the convergence position, on a plane parallel to the cross section perpendicular to the longitudinal direction of the cylindrical body, and from the intersection of the cross section at the convergence position and the vertical seal portion to the central axis of the cylindrical body on the cross section At the base of the contents of the sealing portion, which is folded and welded in a direction substantially perpendicular to the direction of
( b ) 項目 （ a ) の前記中心.軸への方向と平行な方向に沿って、 陥没部が形成されている こと。  (b) A depression is formed along the direction parallel to the center axis of item (a).
本発明でのフィ ルムを溶融させる手段は、 超音波ホーンおよびァ ンビルによ り集束部のフ ィ ルムを挟圧し、 超音波によ り フ ィ ルムに 発熱を生じさせる超音波溶着手段、 または高周波電極によ り集束部 のフ ィ ルムを挟圧し、 高周波誘電加熱によってフ ィ ルムに発熱を生 じさせる高周波溶着手段、 または加熱板で集束部のフ ィ ルムを挟圧 し、 加熱板か ら与え られる熱によ り集束部のフ ィ ルムを溶融させる 加熱溶着手段、 またはノ ズルも し く はス リ ッ ト を通して熱風を噴出 させて集束部のフィ ルムを溶着する熱風ジェ ッ ト溶着手段などであ る。  Means for melting the film in the present invention is an ultrasonic welding means for sandwiching the film of the focusing portion with an ultrasonic horn and an anvil and generating heat in the film by ultrasonic waves, or A high-frequency electrode clamps the film at the focusing section, and high-frequency welding means that generates heat in the film by high-frequency dielectric heating, or a heating plate sandwiches the film at the focusing section and heats the plate. Heat welding means to melt the film in the focusing part by the heat given by the heat, or hot-air jet welding in which hot air is blown out through nozzles or slits to weld the film in the focusing part Means.
本発明では、 縦シール部が集束部の内部でフ ィ ルムの折り畳み部 間に挟まれるよ う に埋没している。 縦シール部が形成されている偏 . In the present invention, the vertical seal portion is buried so as to be sandwiched between the folded portions of the film inside the focusing portion. Unevenness where the vertical seal is formed .
6 一 平部の面、 すなわち縦シール部が形成されている部分のフィ ルムの 面を溶着手段のホーンやア ンビルなどの加圧面と平行に向け、 この 状態で、 縦シール部およびその前後に位置する フ ィ ルムを前記加圧 面で挟圧し フ ィ ルムを溶着してなる。 また好ま し く は、 縦シール部 が集束部の幅方向の中心に位置してなる。  6 Orient the surface of the flat part, that is, the surface of the film where the vertical seal is formed, parallel to the pressing surface of the horn or anvil of the welding means. The film to be positioned is sandwiched between the pressurizing surfaces to weld the film. Preferably, the vertical seal portion is located at the center in the width direction of the focusing portion.
したがって、 ホーンおよびア ン ビルなどの加圧面によ り集束部を 挟圧する ときに、 縦シール部が集束部のほぼ中心に埋没する状態で、 集束部のフ ィ ルムをほぼ均一に加圧して、 このフ ィ ルムが溶融して なる。 集束部のフ ィ ルムに対して、 一方に片寄らない均一な加圧力 が作用する こ とによ り 、 集束部のフ ィ ルムの溶融が十分で且つほぼ 均質にな り 、 縦シール部およびその前後に位置する フ ィ ルムが溶着 されて集束部の耐圧強度が大きく なる。  Therefore, when the focusing part is pressed by the pressing surface of the horn or anvil, the film of the focusing part is pressed almost uniformly while the vertical seal part is buried almost in the center of the focusing part. This film is melted. By applying a uniform pressing force to the film at the converging portion without biasing to one side, the film at the converging portion is sufficiently and almost uniformly melted, and the vertical seal portion and its The films located before and after are welded, and the pressure resistance of the focusing portion increases.
上記において、 内容物が除去された部分の筒状体が、 縦シール部 と対面する方向か ら挟圧されて偏平部が形成され、 偏平部の幅方向 の中間部分には前記縦シール部が位置してお り 、 その後に前記偏平 部が折り畳まれて集束部が形成される こ とが好ま しい。  In the above, the cylindrical body of the portion from which the content has been removed is squeezed from the direction facing the vertical seal portion to form a flat portion, and the vertical seal portion is formed at an intermediate portion in the width direction of the flat portion. Preferably, the flat portion is folded to form a converging portion thereafter.
このよ う に、 偏平部では縦シール部が幅方向の中間部分、 好ま し く は幅方向の中心に位置した状態で、 集束部でフィ ルムが規則正し く 折り畳まれている と、 この集束部が例えばホーンおよびアンビル などの加圧面で均一に加圧されやすく な り 、 集束部での溶着をさ ら に均一にできる。  As described above, in the flat portion, when the longitudinal seal portion is located at the middle portion in the width direction, preferably in the center in the width direction, and the film is folded regularly at the focusing portion, this focusing portion is formed. For example, it is easy to apply pressure uniformly on a pressing surface such as a horn and an anvil, so that welding at the converging portion can be made more uniform.
また本発明の筒状体の製造方法は、  Further, the method for producing a cylindrical body of the present invention,
フィ ルムの緣部どう しが接合された縦シール部が長手方向に延び る筒状体を形成する工程と、  A step of forming a tubular body in which a longitudinal seal portion where the 緣 portions of the film are joined to each other extends in the longitudinal direction;
前記筒状体の内部に内容物を充填する工程と、 内容物が充填された筒状包装体を、 縦シール部と対面する方向か ら押圧し、 その部分の内容物を除いて偏平部を形成する工程と、 前記偏平部の両端側か ら集束力 を与え、 多数の折 り畳み部が形成 し、 前記折 り畳み部の一つは前記縦シール部を含んでお り 、 この縦 シール部を含んだ折 り畳み部は他の折り畳み部によって挟まれるよ うな集束部を形成する工程と、 A step of filling the inside of the tubular body with contents, Pressing the cylindrical package filled with the content from the direction facing the vertical seal portion to form a flat portion except for the content of the portion, and converging force from both ends of the flat portion. A plurality of folds are formed, one of the folds includes the vertical seal, and the fold including the vertical seal is sandwiched by the other folds. Forming a focusing portion such that
前記集束部を、 折 り畳み部の重な り方向か ら挟圧して、 前記集束 部において二つの箇所で溶着して二つの封止部を形成する工程と、 前記二つの箇所の間において前記集束部を分離し、 個々 の包装体 を得る工程とを含むこ とを特徴とするものである。  Pressing the convergence portion from the direction in which the folding portion overlaps, welding the convergence portion at two locations to form two sealing portions; and Separating the convergence section to obtain individual packages.
上記において、 前記集束部を形成する工程で、 前記縦シール部が 前記集束部の中央に位置するよ う に、 前記偏平部の平面側か ら、 前 記偏平部に案内力を与える ことが好ましい。  In the above, in the step of forming the convergence section, it is preferable that a guide force is applied to the flat section from the flat side of the flat section so that the vertical seal section is located at the center of the collection section. .
さ らに、 本発明の筒状包装体の製造装置は、  In addition, the apparatus for manufacturing a tubular package of the present invention includes:
フ ィ ルム の縁部どう しを接合してフ ィ ルムの筒状体の長手方向へ 縦シール部を形成するシール手段と、 前記筒状体の内部に内容物を 充填する手段と、 前記筒状体を前記縦シール部と対面する方向か ら 挟圧して筒状体内の内容物を除去して偏平部を形成する し ごき手段 と、 前記偏平部を集束し集束部を形成する集束手段と、 前記集束部 のフ ィ ルムを二つの個所で溶着する溶着手段と、 前記溶着された二 つの箇所の間で集束部を切断する切断手段とが設けられ、  Sealing means for joining the edges of the film to form a vertical seal in the longitudinal direction of the cylindrical body of the film; means for filling the inside of the cylindrical body with contents; Squeezing means for squeezing the cylindrical body from a direction facing the vertical seal portion to remove contents in the cylindrical body to form a flat portion; and converging means for converging the flat portion to form a converging portion. Welding means for welding the film of the convergence part at two places, and cutting means for cutting the convergence part between the two welded parts,
前記集束手段には、 前記偏平部に前記偏平部の両端側か ら集束力 を与える凹部が形成されてお り 、 この凹部の底部は前記偏平部の偏 平面とほぼ直交する平面となっ てお り 、 この凹部で前記偏平部が集 束させられる ときに、 前記偏平部を構成する フ ィ ルムが折り畳まれ て多数の折 り畳み部が形成され、 前記折 り畳み部の一つには前記縦 シール部があ り 、 こ の縦シール部を含んだ折 り畳み部は他の折 り畳 み部によって挟まれるよう に折り畳まれ、 The converging means has a concave portion for applying a converging force from both ends of the flat portion to the flat portion, and the bottom of the concave portion is a plane substantially orthogonal to the flat surface of the flat portion. When the flat portion is converged by the concave portion, the film constituting the flat portion is folded. A large number of folds are formed, and one of the folds has the vertical seal, and the fold including this vertical seal is formed by the other folds. Folded to be sandwiched,
前記溶着手段には、 前記集束部において折 り畳まれた フ ィ ルムの 重な り方向か ら前記集束部を挟圧する間、 前記集束部の フィ ルムを 二つの箇所溶着する加圧溶着部材が設け られている こ とを特徴とす るものである。  The welding means includes a pressure welding member that welds the film of the convergence portion at two places while pressing the convergence portion from the overlapping direction of the films folded at the convergence portion. It is characterized by being provided.
上記において、 前記集束手段の前記凹部の開 口部の開 口幅が、 前 記平面状の底部の幅寸法と同じかそれ以下である ことが好ましい。  In the above, it is preferable that the opening width of the opening of the concave portion of the focusing means is equal to or smaller than the width of the flat bottom.
上記のよ う に、 集束板に形成された凹部の底部を平面形状と し、 好ま し く は、 凹部の開口幅を前記底部の幅寸法よ り も小さ く してお く と、 この集束板で筒状体の偏平部を挟圧する際に、 フ ィ ルムが所 定幅内で折り畳まれるよう になり、 溶着部材によ り溶着したときに、 ピンホールが生じにく く なる。  As described above, when the bottom of the concave portion formed in the converging plate has a planar shape, and preferably, the opening width of the concave portion is smaller than the width dimension of the bottom portion, the converging plate has When the flat portion of the cylindrical body is pressed with the, the film is folded within a predetermined width, and pinholes are less likely to be generated when the film is welded by the welding member.
さ ら に、 前記加圧溶着手段が超音波ホーン と予備加熱されたアル ビンとからなる こ とが好ま しい。 図面の簡単な説明  Further, it is preferable that the pressure welding means comprises an ultrasonic horn and a preheated albin. BRIEF DESCRIPTION OF THE FIGURES
第 1 図 （ A ) は、 本発明の筒状包装体の製造に使用される縦型連 続充填包装装置の正面図、 （ B ) は （ A ) の部分側面図である。 第 2 図は、 第 1 図 （ A ) の縦型連続充填包装装置のフ ィ ルム成形部と縦 シール形成部を示す斜視図である。 第 3 図は、 フ ィ ルムの筒状体に 偏平部が形成された状態を示す部分斜視図である。 第 4 図は、 偏平 部が集束板によ り集束させられる状態を示す部分斜視図である。 第 5 図 （A ) は偏平部の断面図、 （ B ) は集束部が超音波溶着される状 . FIG. 1 (A) is a front view of a vertical continuous filling and packaging apparatus used for manufacturing the tubular package of the present invention, and (B) is a partial side view of (A). FIG. 2 is a perspective view showing a film forming section and a vertical seal forming section of the vertical continuous filling and packaging apparatus shown in FIG. 1 (A). FIG. 3 is a partial perspective view showing a state where a flat portion is formed in a tubular body of the film. FIG. 4 is a partial perspective view showing a state where the flat portion is focused by a focusing plate. Fig. 5 (A) is a cross-sectional view of the flat part, and (B) is a state where the focusing part is ultrasonically welded. .
9 一 態を示す断面図である。 第 6 図は、 本発明の筒状包装体を示す正面 図である。 第 7 図は、 筒状包装体の封止部を示す部分拡大斜視図で ある。 第 8 図は、 縦シール部の他の構造を示す断面図である。 第 9 図 （ A ) は従来の偏平部を示す断面図、 （ B ) は従来の集束部が超音 波溶着される状態を示す断面図である。 第 1 0 図 （ A ) ( B ) ( C ) は、 本発明に好適な集束板を種類別に示す平面図、 （ D ) は比較例の 集束板を示す平面図である。 第 1 1 図 （ A) ( C ) はそれぞれ第 1 0 図 （ A ) ( B ) に示した集束板の凹部を種類別に示す拡大平面図、 ( B ) ( D ) はそれぞれ第 1 1 図 （ A ) ( C ) に示した凹部で集束さ れて溶着された封止部の断面図である。 第 1 2 図 （ A ) は第 1 0 図 ( C ) に示した集束板の凹部を示す拡大平面図、 （ B ) は第 1 2 図 ( A ) に示した凹部で集束されて溶着された封止部の断面図、 （ C ) は比較例である第 1 0 図 （ D ) に示した集束板の凹部を示す拡大平 面図、 （ D ) は第 1 2 図 （ C ) に示した凹部で集束されて溶着された 封止部の断面図である。 発明を実施するための最良の形態  9 is a sectional view showing one embodiment. FIG. 6 is a front view showing a tubular package of the present invention. FIG. 7 is a partially enlarged perspective view showing a sealed portion of the tubular package. FIG. 8 is a sectional view showing another structure of the vertical seal portion. Fig. 9 (A) is a cross-sectional view showing a conventional flat part, and (B) is a cross-sectional view showing a state where a conventional focusing part is ultrasonically welded. FIGS. 10 (A), (B), and (C) are plan views showing types of focusing plates suitable for the present invention, and FIG. 10 (D) is a plan view showing a focusing plate of a comparative example. FIGS. 11 (A) and (C) are enlarged plan views showing the types of the concave portions of the focusing plate shown in FIGS. 10 (A) and (B), respectively, and (B) and (D) are FIGS. FIGS. 3A and 3B are cross-sectional views of a sealed portion that is focused and welded at the concave portions illustrated in FIGS. Fig. 12 (A) is an enlarged plan view showing the concave portion of the focusing plate shown in Fig. 10 (C), and (B) is a bundle which is focused and welded at the concave portion shown in Fig. 12 (A). Sectional view of the sealing portion, (C) is an enlarged plan view showing the concave portion of the focusing plate shown in FIG. 10 (D) as a comparative example, and (D) is shown in FIG. 12 (C). FIG. 4 is a cross-sectional view of a sealing portion that is focused and welded in a recess. BEST MODE FOR CARRYING OUT THE INVENTION
第 6 図は本発明の筒状包装体の正面図、 第 7 図は前記筒状包装体 の封止部を示す部分拡大斜視図である。  FIG. 6 is a front view of a tubular package of the present invention, and FIG. 7 is a partially enlarged perspective view showing a sealing portion of the tubular package.
この筒状包装体 1 は、 塩化ビニ リ デン系樹脂のフ ィ ルムなどのよ う な酸素ガスバリ ヤ性に富むフ ィ ルム F の幅方向の緣部 F a と F b が重ねられ、 緣部 F a と F b の重ね幅のほぼ中心部分でフ ィ ルム F どう しが高周波電極を用いた高周波誘電加熱によ り溶着され、 縦シ —ル部 S 1 が形成されている。 この縦シール部 S 1 は、 筒状体の長 手方向に沿って延びている。 5371 In this cylindrical package 1, a part F a and a part F b in a width direction of a film F having a high oxygen gas barrier property such as a film of vinylidene chloride resin are overlapped, and Films F are welded to each other by high-frequency dielectric heating using a high-frequency electrode at a substantially central portion of the overlap width of F a and F b, thereby forming a vertical seal portion S 1. The vertical seal portion S1 extends along the longitudinal direction of the tubular body. 5371
10 一 前記フ ィ ルム Fで形成された筒状体の長手方向の両端部が集束さ せられて、 集束部 2 が形成され、 この集束部 2 のフ ィ ルムが超音波 溶着手段によ り発熱させられ、 フ ィ ルム どう しが溶着された封止部 3 が形成されている。 本発明では、 封止部 3 がフ ィ ルム Fの溶着の みで形成されてお り 、 従来のよ う な金属製のワイヤク リ ッ プによる 結紮手段は設けられていない。 ただし、 プラスチッ ク材料などで形 成された金属以外のク リ ッ プで前記封止部 3 がさ ら に締め付けられ る構造であってもよい。  10-1 Both ends in the longitudinal direction of the cylindrical body formed of the film F are focused to form a focusing portion 2, and the film of the focusing portion 2 is formed by ultrasonic welding means. Heat is generated, and a sealing portion 3 is formed in which the films are welded to each other. In the present invention, the sealing portion 3 is formed only by welding the film F, and does not include a conventional ligating means using a metal wire clip. However, a structure in which the sealing portion 3 is further tightened by a clip other than metal formed of a plastic material or the like may be used.
第 4 図および第 5 図 （ A ) ( B ) に示されるよう に、 前記集束部 2 では、 内容物が除去された状態のフ ィ ルム F の筒状体が平面的に押 し潰されて偏平部 F r が形成され、 こ の偏平部 F r が規則的に折 り 畳まれている。  As shown in FIGS. 4 and 5 (A) and (B), in the focusing section 2, the tubular body of the film F from which the contents have been removed is flattened and crushed. A flat portion Fr is formed, and the flat portion Fr is regularly folded.
第 5 図 （ A ) ( B ) は、 前記集束部 2 を形成する過程をさ ら に詳し く示している。  5 (A) and 5 (B) show the process of forming the focusing section 2 in more detail.
第 5 図 （ A ) に示すよ う に、 フ ィ ルム Fで形成された筒状体の内 部の内容物を除去して、 偏平部 F r が形成されるが、 この偏平部 F r では、 縦シール部 S 1 を、 幅方向の中間部分、 好ま し く は幅方向 の中心に位置させる。 こ の偏平部 F r の両端側か ら、 集束板による 集束力 P , Pが与え られて、 偏平部 F r が集束させられるが、 こ の とき必要に応じて偏平部 F r の側方か ら互い違いにガイ ドカ G a ， G a , G b , G bが与え られ、 その結果、 第 5 図 （ B ) に示すよ う に、 偏平部 F r が規則的に折 り 畳まれ、 多数の折 り畳み部が形成さ れるよう にして集束される。  As shown in FIG. 5 (A), the flat portion Fr is formed by removing the contents inside the cylindrical body formed of the film F. In the flat portion Fr, the flat portion Fr is formed. The vertical seal portion S 1 is positioned at the middle portion in the width direction, preferably at the center in the width direction. From both ends of the flat portion Fr, the converging force P, P by the convergence plate is given to converge the flat portion Fr, and at this time, the flat portion Fr may be converged as necessary. The guides G a, G a, G b, and G b are provided alternately, and as a result, as shown in FIG. 5 (B), the flat portion Fr is folded regularly, and It is focused so that the fold is formed.
第 5 図 （ B ) に示すよう に、 集束部 2 では、 縦シール部 S 1 がフ イ ルム F によ り挟まれ、 縦シール部 S 1 が集束部 2 の内部に位置し ている。 また集束部 2 の折 り畳み面は Y方向であ り 、 縦シール部 S 1 が形成されている箇所でのフ ィ ルム、 すなわち縦シール部 S 1 の 両側に連続する フ ィ ルムの面 F s ， F s は、 前記折 り畳み面と同 じ 方向へ向け られて、 一つの折り畳み部を形成している。 よって、 集 束部 2 において、 縦シール部 S 1 は、 フ ィ ルムの折 り畳みによる重 ね方向 （ X方向） のほぼ中心に位置し、 また折 り畳み面方向 （ Y方 向） を集束部 2 の幅方向と したときに、 縦シール部 S 1 はこ の幅方 向のほぼ中心に位置している。 As shown in FIG. 5 (B), in the focusing portion 2, the vertical seal portion S1 is sandwiched between the films F, and the vertical seal portion S1 is located inside the focusing portion 2. ing. Further, the folding surface of the focusing portion 2 is in the Y direction, and the film at the location where the vertical seal portion S1 is formed, that is, the surface F of the film that is continuous on both sides of the vertical seal portion S1. s and Fs are oriented in the same direction as the folding surface to form one folding portion. Therefore, in the converging section 2, the vertical seal section S1 is located substantially at the center in the folding direction (X direction) due to the folding of the film, and converges in the folding surface direction (Y direction). When viewed in the width direction of the portion 2, the vertical seal portion S1 is located substantially at the center in the width direction.
さ ら に、 超音波ホー ン 4およびア ン ビル 5 によ り 、 集束部 2 を溶 着する場合には、 ホーン 4 の加圧面 4 a とアン ビル 5 の加圧面 5 a に対し、 縦シール部 S 1 が形成されている箇所でのフ ィ ルムの面 F s , F s が平行になるよ う に して、 集束部 2 で折 り畳まれたフ ィ ル ムの重ね方向か ら、 前記加圧面 4 a と加圧面 5 a でフ ィ ルム Fが挟 圧され、 超音波がフ ィ ルムに与え られて、 集束部 2 でのフ ィ ルム F が溶融させられる。  In addition, when the focusing portion 2 is welded by the ultrasonic horn 4 and the anvil 5, a vertical seal is applied to the pressing surface 4a of the horn 4 and the pressing surface 5a of the anvil 5. The film faces F s and F s at the point where the portion S 1 is formed are parallel to each other, and the film folded at the focusing portion 2 is viewed from the overlapping direction. The film F is sandwiched between the pressing surface 4a and the pressing surface 5a, an ultrasonic wave is applied to the film, and the film F in the focusing unit 2 is melted.
こ のよ う に 、 縦シール部 S 1 が集束部 2 の内部に位置し、 また縦 シール部 S 1 がフ ィ ルムの折 り畳み部の間に挟まれ、 しかも縦シー ル部 S 1 が集束部 2 のほぼ中心に位置し、 縦シール部 S 1 が形成さ れた箇所のフ イ リレムの面 F s , F s と平行な加圧面 4 a , 5 a によ つて、 縦シール部 S 1 がその前後に位置するフ ィ ルム と共に溶着さ れる。 この場合、 集束部 2 では、 縦シール部 S 1 の溶着塊およびそ の左右両側に延びるフ ィ ルムの縁部 F a , F b 、 の左右前後に、 複 数のフ ィ ルムの折り畳み部が均等に位置するため、 加圧面 4 a と 5 a とによる加圧力が、 集束部 2 のフィ ルムに対して均等に作用する。 このよ う に、 集束部 2 に対して加圧力が均一に作用するために、 . In this way, the vertical seal portion S1 is located inside the focusing portion 2, the vertical seal portion S1 is sandwiched between the folded portions of the film, and the vertical seal portion S1 is located between the folded portions. The pressurizing surfaces 4 a, 5 a parallel to the surface F s, F s of the filem at the location where the vertical seal portion S 1 is formed, which is located substantially at the center of the focusing portion 2, and the vertical seal portion S 1 is welded together with the films located before and after it. In this case, in the converging portion 2, a plurality of film folding portions are formed before and after the left and right sides of the welded mass of the vertical seal portion S1 and the film edges Fa and Fb extending to the left and right sides thereof. Since they are positioned evenly, the pressing force of the pressing surfaces 4 a and 5 a acts evenly on the film of the focusing unit 2. As described above, since the pressing force acts uniformly on the focusing unit 2, .
12 一 集束部 2 の幅方向 （ Y方向） において、 加圧力の片寄 り が生じにく く なる。 そのため、 集束部 2 内のフ ィ ルム Fが、 縦シール部 S 1 の 溶着塊を含めて均等に溶融され、 その結果、 封止部 3 での溶着品質 がよ く な り、 ピンホールなどが生じにく く なる。  12 In the width direction (Y direction) of the focusing unit 2, the bias of the applied pressure is less likely to occur. As a result, the film F in the focusing section 2 is uniformly melted including the welded mass of the vertical seal section S1, and as a result, the welding quality in the sealing section 3 is improved, and pinholes and the like are reduced. It is difficult to occur.
次に、 前記筒状包装体の製造方法を第 1 図ないし第 5 図 （A) ( B ) の図面を参照して順に説明する。  Next, a method of manufacturing the cylindrical package will be described in order with reference to FIGS. 1 to 5 (A) and (B).
第 1 図 （ A ) は、 筒状包装体を製造する縦型連続充填包装装置の 概略構造を示す正面図、 第 1 図 （ B ) は第 1 図 （ A ) の部分側面図 である。 また、 第 2 図は前記縦型連続充填包装装置のフ ィ ルム成形 部を示す部分斜視図である。  FIG. 1 (A) is a front view showing a schematic structure of a vertical continuous filling and packaging apparatus for producing a tubular package, and FIG. 1 (B) is a partial side view of FIG. 1 (A). FIG. 2 is a partial perspective view showing a film forming section of the vertical continuous filling and packaging apparatus.
フ ィ ルム F は、 第 1 図 （ A ) に示す原反 1 0 か ら連続的に引出さ れ、 案内ロール 1 1 a と 1 1 b に案内されて成形部材 1 2 に導かれ る。 成形部材 1 2 はフ ォーミ ングプレー ト と称される。 第 2 図に示 すよ う に、 成形部材 1 2 は、 金属板によ り筒状に成形され、 その縁 部どう しが長手方向に離間して重ねられ且つその上縁部 1 2 a が傾斜 状態となっている。  The film F is continuously withdrawn from the web 10 shown in FIG. 1 (A), guided by the guide rolls 11a and 11b, and guided to the forming member 12. The formed member 12 is called a forming plate. As shown in FIG. 2, the molded member 12 is formed into a tubular shape from a metal plate, the edges of the molded member 12 are overlapped with each other in the longitudinal direction, and the upper edge 12 a It is inclined.
案内ロール 1 l b を通過したフ ィ ルム F は、 成形部材 1 2 の上緣 部 1 2 aか ら内側へ折り 返されて筒状に成形され、 このときフ ィ ル ム Fの緣部 F a と F b は、 成形部材 1 2 の緣部 1 2 b と 1 2 c との 間に導かれて互いに重ね合わされる。 成形部材 1 2 の下には、 高周 波電極 1 3 a と 1 3 b が対向して設けられ、 この縁部 F a と緣部 F b との重な り 部のほぼ中心部分が、 前記高周波電極 1 3 a と 1 3 b とで挟圧されて溶着され、 縦シール部 S 1 が形成されて、 筒状体が 連続して形成される。  The film F that has passed 1 lb of the guide roll is turned inward from the upper portion 12 a of the forming member 12 and formed into a cylindrical shape. At this time, the lower portion F a of the film F And F b are guided between the upper portions 12 b and 12 c of the molded member 12 and overlap each other. Under the molded member 12, high-frequency electrodes 13a and 13b are provided so as to face each other, and a substantially central portion of an overlapping portion between the edge portion Fa and the 緣 portion Fb is formed as described above. The high-frequency electrodes 13a and 13b are sandwiched by pressure and welded to form a vertical seal portion S1, whereby a cylindrical body is formed continuously.
高周波電極 1 3 a と 1 3 b の下方位置には、 連続して回転する送 り ローラ 1 4 a と 1 4 b が設けられ、 縦シール部 S 1 が形成された 筒状体が、 前記送 り ローラ 1 4 a と 1 4 b とで挟持され、 且つ送り ローラの回転力によ り 一定速度で下方へ送り 出される。 または送り ローラ 1 4 a と 1 4 b とで、 筒状体が間欠送り されてもよい。 The continuously rotating feeder is located below the high-frequency electrodes 13a and 13b. The cylindrical body provided with the rollers 14a and 14b and having the longitudinal seal portion S1 is sandwiched between the feed rollers 14a and 14b, and the rotational force of the feed roller is reduced. It is sent downward at a more constant speed. Alternatively, the cylindrical body may be intermittently fed by the feed rollers 14a and 14b.
前記成形部材 1 2 の中心には、 上方から充填ノ ズル 1 5 が挿入さ れてお り 、 この充填ノ ズル 1 5 の上方には充填ポンプ 1 6 が設けら れている。 成形部材 1 2 の上縁部で反転されて筒状に成形され、 且 つ高周波電極 1 3 a と 1 3 b で縦シール部 S 1 が形成されたフ ィ ル ム F の筒状体に対し、 前記充填ポンプ 1 6 および充填ノ ズル 1 5 か ら加工食品などの内容物 1 7 が単位時間当 り一定量で連続的に充填 される。  A filling nozzle 15 is inserted into the center of the molding member 12 from above, and a filling pump 16 is provided above the filling nozzle 15. The cylindrical member of the film F, which is inverted at the upper edge of the molded member 12 and formed into a cylindrical shape, and in which the longitudinal seal portion S1 is formed by the high-frequency electrodes 13a and 13b. From the filling pump 16 and the filling nozzle 15, contents 17 such as processed food are continuously filled in a constant amount per unit time.
送り ローラ 1 4 a 、 1 4 b の下方位置には、 し ごき手段を構成す る一対の し ごきローラ 1 8 a と 1 8 bが設けられ、 し ごきローラ 1 8 a と 1 8 b が間欠的に圧接と離反を繰り返すよ う に駆動される。 この し ごきローラ 1 8 a と 1 8 b によ り 、 連続して下.方へ送られる フ ィ ルム F の筒状体が一定の間隔で挟圧される。 し ごき ローラ 1 8 a と 1 8 b とで筒状体が挟圧される と、 筒状体の内部の内容物 1 Ί が部分的に除去され、 フ ィ ルム F どう しが圧着して偏平部 F r が形 成される。  Below the feed rollers 14a and 14b, there are provided a pair of ironing rollers 18a and 18b constituting an ironing means, and the ironing rollers 18a and 18b are provided. b is driven to intermittently repeat pressing and separating. By the ironing rollers 18a and 18b, the cylindrical body of the film F continuously fed downward is pressed at a constant interval. When the cylindrical body is pressed between the ironing rollers 18a and 18b, the contents 1 の inside the cylindrical body are partially removed, and the films F are pressed together. A flat portion Fr is formed.
第 1 図 （A ) ( B ) に示すよう に、 しごきローラ 1 8 a , 1 8 b は、 縦シール部 S 1 と対面する方向か ら筒状体を押圧するため、 第 3 図 に示すよう に、 し ごき ローラ 1 8 a , 1 8 b の加圧によ り 形成され た偏平部 F r の幅寸法を Wと したときに、 前記縦シール部 S 1 は前 記幅寸法 Wのほぼ中心に位置する。  As shown in FIGS. 1 (A) and 1 (B), the ironing rollers 18a and 18b press the cylindrical body from the direction facing the vertical seal portion S1 as shown in FIG. In addition, when the width of the flat portion Fr formed by pressurizing the ironing rollers 18a and 18b is W, the vertical seal portion S1 is substantially equal to the width W. Centrally located.
し ごきローラ 1 8 a , 1 8 b の下方位置には、 集束 ' 封止機構 2 . At the position below the ironing rollers 18a and 18b, the convergence .
14 ―  14 -
0 が設け られている。 こ の集束 · 封止機構 2 0 は、 筒状体の下降速 度に同期 して昇降駆動される も のであ り 、 下降動作の際に、 前記偏 平部 F r を挟圧して集束させて集束部 2 を形成し、 さ ら に超音波を 用いて集束部 2 を溶着し、 さ ら に集束部 2 を切断する ものとなっ て いる。 または、 フ ィ ルム F の筒状体が下方へ間欠送り され、 筒状体 が停止している ときに、 集束 · 封止機構 2 0 によ り 、 集束などの各 動作が行なわれてもよい。 0 is provided. The convergence / sealing mechanism 20 is driven to move up and down in synchronization with the lowering speed of the tubular body, and presses and flattens the flat portion Fr during the lowering operation. The convergence section 2 is formed, the convergence section 2 is welded using ultrasonic waves, and the convergence section 2 is further cut. Alternatively, when the tubular body of the film F is intermittently fed downward and the tubular body is stopped, each operation such as focusing may be performed by the focusing / sealing mechanism 20. .
前記集束 · 封止機構 2 0 には、 上下に間隔を開けて設けられた、 集束手段と しての集束板 2 1 a ， 2 l b と、 これに対向する同じ く 集束手段と しての集束板 2 2 a , 2 2 b と、 上側の集束板 2 1 a と 下側の集束板 2 1 b の間に位置する超音波ホーン 4 と、 上側の集束 板 2 2 a と下側の集束板 2 2 b との間に位置するアン ビル 5 と、 ァ ンビル 5 の中間に位置する切断刃 2 3 と を有している。 また集束 - 封止機構 2 0 には、 昇降動作に同期して集束板 2 1 a , 2 1 b と集 束板 2 2 a ， 2 2 b と を互いに圧接させる方向へ動作させる駆動機 構、 ホーン 4 とアンビル 5 とを互いに圧接させる圧接機構、 および 切断刃 2 3 を前進させる機構が設けられている。  The convergence / sealing mechanism 20 is provided with convergence plates 21a and 2lb as convergence means provided at intervals in the vertical direction, and convergence as the same convergence means as opposed thereto. Plates 2 2 a, 2 2 b, ultrasonic horn 4 located between upper focusing plate 21 a and lower focusing plate 2 1 b, upper focusing plate 2 2 a and lower focusing plate 2 2 b, and a cutting blade 23 located in the middle of the anvil 5. Further, the convergence-sealing mechanism 20 includes a drive mechanism for operating the convergence plates 21a and 21b and the convergence plates 22a and 22b in a direction in which they are pressed against each other in synchronization with the elevating operation. A pressing mechanism for pressing the horn 4 and the anvil 5 against each other and a mechanism for advancing the cutting blade 23 are provided.
第 1 図 （ B ) および第 4 図に示すよ う に、 し ごきローラ 1 8 a と 1 8 り との挟圧力でフ ィ ルムの筒状体内の内容物 1 7 を部分的に排 除されて偏平部 F r が形成されるが、 集束 ' 封止機構 2 0 では、 こ の偏平部 F r に対し、 偏平面の両端方向か ら集束板 2 1 a , 2 1 b および集束板 2 2 a , 2 2 b が、 互いに接近する方向へ駆動され、 偏平部 F r が幅方向両側から集束力 P， P を受けて集束させられる。  As shown in Fig. 1 (B) and Fig. 4, the contents 17 in the film cylinder are partially removed by the clamping force between the ironing rollers 18a and 18r. Then, the flat portion Fr is formed. In the converging / sealing mechanism 20, the flat plates Fr and the converging plates 21 a and 21 b and the converging plate 2 2a and 2 2b are driven in directions approaching each other, and the flat portion Fr is focused by receiving focusing forces P and P from both sides in the width direction.
このとき第 5 図 （ A ) に示すよう に、 偏平部 F r に対して一方の 側から例えば 2 力所にガイ ド力 G a ， G aが与え られ、 他方の側か -At this time, as shown in Fig. 5 (A), guide forces G a and G a are applied to the flat portion Fr from one side, for example, to two places, and -
15 一 ら、 前記ガイ ド力 G a , G a に対して互い違いの位置か らガイ ド力 G b ， G b が与え られる。 こ のガイ ド力は、 集束板 2 1 a ， 2 1 b と集束板 2 2 a , 2 2 b によ り偏平部 F r に集束力 P ， Pが与え ら れる ときに、 これに同期して、 偏平部 F r の側方からガイ ド突起ま たはガイ ド板を接近させる こ となどによ り与えられる。 15 Further, the guide forces Gb, Gb are given to the guide forces Ga, Ga from alternate positions. This guide force is synchronized with the focusing force P, P applied to the flat portion Fr by the focusing plates 21a, 21b and the focusing plates 22a, 22b. The guide projection or the guide plate is approached from the side of the flat portion Fr.
その結果、 集束板 2 1 a , 2 1 b および集束板 2 2 a ， 2 2 b に よ り 集束させられた集束部 2 では、 前記ガイ ドカ G a と G b によ り 偏平部 F r が規則的に折 り畳まれて複数の折り畳み部が形成され、 前記のよ う に、 縦シール部 S 1 は、 集束部 2 内でフ ィ ルムの折 り畳 み部間に挟まれる。 また縦シール部 S 1 は、 集束部 2 内で X方向と Y方向のほぼ中心に位置する。  As a result, in the converging portions 2 converged by the converging plates 21a and 21b and the converging plates 22a and 22b, the flat portion Fr is formed by the guides Ga and Gb. The plurality of folded portions are formed by being regularly folded, and the vertical seal portion S 1 is sandwiched between the folded portions of the film in the focusing portion 2 as described above. The vertical seal portion S 1 is located substantially at the center in the X direction and the Y direction in the focusing portion 2.
集束板による集束が完了 した直後に、 超音波ホーン 4 とア ンビル 5 が接近し、 集束部 2 の 2 力所が超音波溶着される。 このとき、 集 束部 2 内の縦シール部 S 1 が形成されている箇所のフ ィ ルムの面 F s (縦シール部 S 1 を含んだ折 り畳み部の一つである面 F s ) は、 ホーン 4 の加圧面 4 a とアン ビル 5 の加圧面 5 a とほぼ平行である。 そのため、 前記のよ う に集束部 2 では縦シール部 S 1 およびその前 後のフ ィ ルムの折り畳み部が一緒に均一に加圧されて、 超音波が与 え られる。 超音波による溶着をよ り 確実にするために、 一ン 4 ま たはアンビル 5 を必要に応じて予熱する こ とが好ましい。  Immediately after the focusing by the focusing plate is completed, the ultrasonic horn 4 and the anvil 5 approach, and the two points of the focusing section 2 are ultrasonically welded. At this time, the surface F s of the film at the portion where the vertical seal portion S 1 is formed in the converging portion 2 (the surface F s which is one of the folded portions including the vertical seal portion S 1) Is substantially parallel to the pressing surface 4 a of the horn 4 and the pressing surface 5 a of the anvil 5. Therefore, as described above, in the focusing portion 2, the vertical seal portion S1 and the folded portions of the front and rear films are uniformly pressed together, and ultrasonic waves are applied. It is preferable to preheat the fin 4 or the anvil 5 as necessary in order to further ensure the ultrasonic welding.
第 1 図 （ B ) に示すよ う に、 集束 · 封止機構 2 0 では、 集束板に よ り偏平部 F r が集束させ られた後に、 ホーン 4 とア ン ビル 5 が互 いに接近するため、 ホーン 4 とアン ビル 5 は基端部が支持された片 持ち状態の構造とな り 、 また加圧面 4 a と 5 a はホーンおよびア ン ビルの支持基端部か ら離れている。 よっ て加圧面 4 a と 5 a によ り フィ ルムが加圧されたときに、 加圧面 4 a と加圧面 5 a の平行状態 が崩れやすい状態となっている。 すなわち集束部における折り畳ま れたフ ィ ルムの厚みが不均一であっ た り 、 または集束部でのフィ ル ムの厚みに片寄 り がある と、 加圧面 4 a と 5 a が平行状態で加圧さ れず、 ホーン とア ンビルに若干の傾きが生じやすく なる。 このよ う な状態では、 集束部のフィ ルムを均一に加圧するのが困難である。 As shown in FIG. 1 (B), in the focusing / sealing mechanism 20, the horn 4 and the anvil 5 approach each other after the flat portion Fr is focused by the focusing plate. Therefore, the horn 4 and the anvil 5 have a cantilever structure in which the base ends are supported, and the pressing surfaces 4a and 5a are separated from the horn and the support base of the anvil. Therefore, due to the pressing surfaces 4a and 5a When the film is pressed, the parallel state of the pressing surface 4a and the pressing surface 5a tends to collapse. That is, if the thickness of the folded film at the focusing portion is not uniform or the thickness of the film at the focusing portion is uneven, the pressing surfaces 4a and 5a are pressed in parallel. The horn and anvil tend to tilt slightly. In such a state, it is difficult to uniformly pressurize the film in the focusing section.
これに対し、 前記実施の形態では、 第 5 図 （ B ) に示すよう に、 縦シール部 S 1 が、 集束部 2 内のほぼ中心に位置し、 縦シール部 S 1 がフ ィ ルムの折 り畳み部間で挟まれた状態となるため、 ホーン 4 の加圧面 4 a とア ンビル 5 の加圧面 5 a が集束部 2 を安定した状態 で加圧しやすく な り 、 集束部 2 が Y方向のそれぞれの位置で均一に 加圧され、 均一に溶融されて封止部 3が形成されるよう になる。  On the other hand, in the above-described embodiment, as shown in FIG. 5 (B), the vertical seal portion S1 is located substantially at the center of the focusing portion 2, and the vertical seal portion S1 is folded. Since the pressing portion 4a of the horn 4 and the pressing surface 5a of the anvil 5 can easily press the focusing portion 2 in a stable state because the pressing portion 4 is sandwiched between the folded portions, the focusing portion 2 is easily moved in the Y direction. The pressure is uniformly applied at each of the positions, and is uniformly melted, so that the sealing portion 3 is formed.
また、 第 5 図 （ A ) に示すよ う に、 偏平部 F r が形成され、 さ ら に第 5 図 （ B ) に示すよう に偏平部 F r が折り畳まれる。 このとき、 縦シール部 S 1 が形成されている フ ィ ルムの一部分 6 a が、 縦シ一 ル部 S 1 か ら包装体の中心軸に向かう面 （ Y軸を含む面） に沿っ て 集束部の内方へ引込まれる。 その結果、 完成した筒状包装体 1 にお いては、 第 7 図に示すよ う に、 封止部 3 の根元部分において、 縦シ ール部 S 1 が形成されている部分のフ ィ ルムに前記 Y軸を含む面方 向へ入り込む陥没部 6 が形成された形状となる。  Further, as shown in FIG. 5 (A), a flat portion Fr is formed, and as shown in FIG. 5 (B), the flat portion Fr is folded. At this time, a portion 6a of the film on which the vertical seal portion S1 is formed is focused along a surface (a surface including the Y axis) from the vertical seal portion S1 toward the center axis of the package. It is drawn inward of the department. As a result, in the completed tubular package 1, as shown in FIG. 7, the film at the portion where the vertical seal portion S1 is formed at the root of the sealing portion 3 is formed. In this case, a recessed portion 6 is formed, which penetrates in the surface direction including the Y axis.
言い代える と、 折 り畳み溶着される前記封止部 3 の内容物根元に あ り且つ筒状体の長手方向に直角 となる集束位置の断面と平行な面 にあって、 前記集束位置の断面と縦シール部 S 1 との交点か ら前記 断面上の筒状体中心軸への方向 （ Y軸方向） と平行な方向に、 第 7 図に示すような陥没部 6 が形成された形状となる。 . In other words, it is located at the base of the content of the sealing portion 3 to be folded and welded, and is in a plane parallel to the section at the focusing position perpendicular to the longitudinal direction of the tubular body, and at the section at the focusing position. A shape in which a depression 6 as shown in FIG. 7 is formed in a direction parallel to the direction (Y-axis direction) from the intersection of the Become. .
17 ― 前記封止部 3 が形成された後に、 上下に間隔を開けて形成された 封止部 3 と 3 の間において集束部 2 が切断刃 2 3 によ り 切断され、 第 6 図に示す個々の筒状包装体に分離される。  17-After the sealing portion 3 is formed, the convergence portion 2 is cut by the cutting blade 23 between the sealing portions 3 and 3 which are formed at an interval above and below, as shown in FIG. Separated into individual tubular packages.
第 4 図に示すよ う に、 各集束板 2 1 a ， 2 l b および集束板 2 2 a , 2 2 b の対向側には、 それぞれ凹部 2 5 と 2 6 が形成されてお り 、 集束板 2 1 a ， 2 l bおよび集束板 2 2 a , 2 2 bが互いに接 近する方向へ駆動される と、 偏平部 F r のフ ィ ルムが前記凹部 2 5 と凹部 2 6 内に挟み込まれて挟圧され、 その結果フィ ルムが集束さ せられる。  As shown in FIG. 4, recesses 25 and 26 are formed on opposite sides of each of the focusing plates 21a and 2lb and the focusing plates 22a and 22b, respectively. When the 2 a and 2 lb and the focusing plates 22 a and 22 b are driven in a direction approaching each other, the film of the flat portion Fr is sandwiched between the concave portions 25 and 26. The film is pinched, so that the film is focused.
本発明では、 第 5 図 （ B ) に示すよ う に、 偏平部 F r が、 なるベ く 規則正し く 折 り畳まれて集束され、 縦シール部 S 1 が形成されて いる部分が、 集束部にて前後か ら フ ィ ルムで挟まれている こ とが好 ま しい。 しかも縦シール部 S 1 が集束部 2 の幅方向 （ Y方向） の中 心に位置する ことが好ま しい。  In the present invention, as shown in FIG. 5 (B), the flat portion Fr is folded and folded as regularly as possible, and the portion where the vertical seal portion S 1 is formed is the focusing portion. It is preferable that the film is sandwiched between the front and rear at the. Moreover, it is preferable that the vertical seal portion S 1 is located at the center of the focusing portion 2 in the width direction (Y direction).
第 1 0 図 （A) ( B ) ( C ) ( D ) どう しょうか ？ は、 集束板 2 1 a， 2 1 b に形成された前記凹部 2 5 の平面形状を種類別に示している が、 第 1 0 図 （ D ) は比較例、 第 1 0 図 （ A ) ( B ) ( C ) が、 本発 明に適する凹部の形状、 第 1 0 図 （A ) ( B ) は最も好ましい凹部の 形状を示している。 なお、 これと対向する側の集束板 2 2 a , 2 2 b に設けられる凹部 2 6 ， 2 6 は、 第 1 0 図に示す凹部 2 5 と対称 形状である。  Fig. 10 (A) (B) (C) (D) What should I do? Fig. 10D shows the planar shape of the concave portion 25 formed in the focusing plates 21a and 21b by type. Fig. 10 (D) is a comparative example, and Figs. 10 (A) and 10 (B) (C) shows the shape of the concave portion suitable for the present invention, and FIGS. 10 (A) and (B) show the most preferable shape of the concave portion. The concave portions 26, 26 provided on the converging plates 22a, 22b on the opposite side are symmetrical with the concave portions 25 shown in FIG.
第 1 2 図 （ C ) は第 1 0 図 （ D ) に示した比較例の凹部 2 5 の平 面形状を示している。 比較例では、 凹部 2 5 の底部 2 5 a は円弧形 状である。 こ の比較例は、 金属ク リ ッ プで結紮を行う 場合のフィ ル ムの集束には適しているが、 本発明でのフィ ルムの集束には不向き . FIG. 12 (C) shows the planar shape of the concave portion 25 of the comparative example shown in FIG. 10 (D). In the comparative example, the bottom 25a of the recess 25 has an arc shape. This comparative example is suitable for film focusing when ligating with a metal clip, but is not suitable for film focusing in the present invention. .
18 一 である。 なぜな ら ば、 こ の凹部 2 5 と、 これに対向する凹部 2 6 と で偏平部 F r が集束される ときに、 底部 2 5 a が円弧形状であるた め、 凹部 2 6 において、 集束の初期段階で偏平部 F r の端部が静止 固定されずに滑るため、 フ ィ ルムの折り畳みに規則性を生じさせる こ とができず、 溶着後の封止部 3 の断面では、 第 1 2 図 （ D ) に示 すよう に、 中心の溶着部 （ i ) の断面積が小さ く 、 この溶着部 （ i ) の両側にフィ ルムのはみ出し部分 （ i i ) が形成される。 溶着部 （ i ) に対しフ ィ ルムのはみ出し部分 （ i i ) は溶着強度が低く な り 、 （ i i ) の部分か ら はみ出 している フ ィ ルムに ピンホールなどが生じや すく なる。  18 One. This is because when the flat portion Fr is converged by the concave portion 25 and the concave portion 26 facing the concave portion 25, the bottom portion 25a has an arc shape. In the initial stage, the end of the flat portion Fr is not stationary and slides without being fixed, so that it is impossible to produce regularity in the folding of the film. 2 As shown in Fig. (D), the cross-sectional area of the central welded portion (i) is small, and the protruding portions (ii) of the film are formed on both sides of the welded portion (i). The protruding portion (ii) of the film has a lower welding strength than the welded portion (i), and pinholes and the like easily occur in the film protruding from the portion (ii).
第 1 2 図 （ A ) は、 第 1 0 図 （ C ) に示した集束板 2 1 a , 2 1 b の凹部 2 5 を示している。 この凹部 2 5 の底部 2 5 a は、 偏平部 F r の偏平面と直交する平面部となっている。 こ の凹部 2 5 によ り 集束されて溶着された封止部 3 の断面形状を第 1 2 図 （ B ) に示し ている。 この場合には、 凹部 2 5 の底部 2 5 a が平面部を有してい る こ と によ り 、 ホー ン と ア ン ビルで挟圧さ れて溶着さ れる溶着部 ( i ) の断面積が第 1 2 図 （ D ) のものよ り も大き く な り 、 はみ出 し部 （ i i ) にはみ出 している フィ ルムも第 1 2 図 （ D ) のものよ り も短く なる。 よって、 はみ出 し部 （ i i ) での ピンホールが形成 される確率は第 1 2 図 （ C ) ( D ) よ り も低く な り 、 密封良品率を高 く できる。  FIG. 12 (A) shows the concave portion 25 of the focusing plates 21 a and 21 b shown in FIG. 10 (C). The bottom 25 a of the concave portion 25 is a flat portion orthogonal to the flat surface of the flat portion Fr. FIG. 12 (B) shows the cross-sectional shape of the sealing portion 3 which is focused and welded by the concave portion 25. In this case, since the bottom portion 25a of the concave portion 25 has a flat portion, the cross-sectional area of the welded portion (i) that is pressed and welded by the horn and the anvil is welded. Is larger than that of Fig. 12 (D), and the film protruding into the protruding part (ii) is shorter than that of Fig. 12 (D). Therefore, the probability that a pinhole is formed at the protruding portion (ii) is lower than that in FIGS. 12 (C) and (D), and the good sealing rate can be increased.
ただし、 第 1 2 図 （ A ) に示す凹部 2 5 は、 開 口部 2 5 b の開 口 幅が底部 2 5 a の幅寸法よ り も大きいために、 底部 2 5 a での平面 部の幅寸法が小さ く な ら ざるを得ない。 その結果、 第 1 2 図 （ B ) に示すよう に、 溶着部 （ i ) の断面積を十分に大き く する こ とがで . However, since the opening width of the opening 25b is larger than the width of the bottom 25a, the recess 25 shown in Fig. 12 (A) has a flat surface at the bottom 25a. The width must be small. As a result, as shown in FIG. 12 (B), the cross-sectional area of the welded portion (i) can be made sufficiently large. .
19 一 きず、 溶着部 （ i ) の両側にフ ィ ルムのはみ出 し部 （ i i ) が若干 残り、 封止部良品率が低く なる余地がある。  19 There is a small amount of film protruding part (ii) on both sides of the welded part (i), and there is room for lowering the yield rate of the sealed part.
第 1 1 図 （ A ) ( C ) は、 最も好ま しい凹部 2 5 の形状を示してい る。 これは第 1 0 図 （A) ( B ) に示したものと同じである。  FIGS. 11 (A) and 11 (C) show the most preferable shapes of the concave portions 25. FIG. This is the same as shown in FIGS. 10 (A) and (B).
第 1 1 図 （ A ) と （ C ) に示す凹部 2 5 は、 共に底部 2 5 a が偏 平部 F r の偏平面と直交する平面部 となっ ている。 また第 1 1 図 ( A ) では凹部 2 5 の開 口部 2 5 b の開 口幅が底部 2 5 a の幅寸法 と同 じであ り 、 第 1 1 図 （ C ) では開口部 2 5 b の開 口幅が底部 2 5 a の幅寸法よ り も狭く なつている。  In the concave portion 25 shown in FIGS. 11A and 11C, the bottom portion 25a is a flat portion orthogonal to the flat surface of the flat portion Fr. Also, in FIG. 11 (A), the opening width of the opening 25 b of the recess 25 is the same as the width dimension of the bottom 25 a, and in FIG. 11 (C), the opening 25 The opening width of b is narrower than the width of the bottom 25a.
第 1 1 図 （ A ) の凹部 2 5 で集束されたフ ィ ルムが溶着された封 止部 3 の断面を第 1 1 図 （ B ) に示し、 第 1 1 図 （ C ) の凹部 2 5 で集束されたフィ ルムが溶着された封止部 3 の断面を第 1 1 図 （ D ) に示している。  Fig. 11 (B) shows a cross section of the sealing portion 3 to which the film converged in the concave portion 25 of Fig. 11 (A) is welded, and the concave portion 25 of Fig. 11 (C). Fig. 11 (D) shows a cross section of the sealing portion 3 where the film focused in the step is welded.
第 1 1 図 （ A ) ( C ) に示す凹部 2 5 を用いる と、 底部 2 5 a の平 面部の幅寸法が大きいために、 この凹部 2 5 内で集束される フ ィ ル ムが平面的に挟圧される面積が広 く な り 、 フ ィ ルムが規則的に折 り 畳まれやすく な り、 第 1 1 図 （ B ) ( D ) に示す封止部 3 の断面では、 良好に溶着される溶着部 （ i ) の面積が非常に広 く なる。 さ ら に溶 着部 （ i ) の両側の部分 （ i i i ) においてもフ ィ ルムが十分に溶 融されて溶着される こ と になる。 その結果、 溶着部か ら はみ出すフ イ ルムが少なく なつて、 フィ ルムの封止部良品率が高く なる。  When the concave portion 25 shown in FIGS. 11A and 11C is used, the film converged in the concave portion 25 is planar because the width of the flat portion of the bottom portion 25a is large. The area between the seals 3 is enlarged, and the film is easily folded regularly. The cross section of the sealing part 3 shown in Figs. 11 (B) and (D) shows good welding. The area of the welded portion (i) to be formed becomes very large. Further, the film is sufficiently melted and welded at the portions (iiii) on both sides of the welded portion (i). As a result, the amount of film protruding from the welded portion is reduced, and the non-defective rate of the film sealing portion is increased.
前記の実施の形態では、 第 5 図 （ A ) に示すよ う に、 フ ィ ルム F の一方の縁部 F a の内面が他方の緣部 F b の外面に平面的に重ねら れたいわゆる封筒状背貼 り の状態で、 縦シール部 S 1 が形成されて いるが、 第 8 図に示すよ う に、 フ ィ ルムの内面どう しが対面 した状 -In the above embodiment, as shown in FIG. 5 (A), a so-called film F in which the inner surface of one edge F a is planarly overlapped with the outer surface of the other F portion F b. A vertical seal portion S1 is formed in the state of the envelope-like backing, but as shown in Fig. 8, the inner surfaces of the film face each other. -
20 一 態で高周波溶着さ れ、 緣部 F a と F b が筒状体の外側へ突出する い わゆる合掌状背貼 り の状態で、 縦シール部 S 2 が形成されてもよい。 20 The longitudinal seal portion S2 may be formed in a state of being so-called a palm-backed state in which the high-frequency welding is performed in one state, and the upper portions Fa and Fb protrude outside the cylindrical body.
〔実施例〕 〔Example〕
本発明の実施例 と して、 以下の筒状包装体を製造した。  As an example of the present invention, the following tubular package was manufactured.
(包装フ イ リレム）  (Packaging file)
塩化 ビニ リ デン共重合体フ ィ ルム （呉羽化学工業株式会社製の製 品名 「ク レハ ロ ン」） で、 フ ィ ルムの合計厚みが 8 0 z mの もの を使 用 した。  A vinylidene chloride copolymer film (Kureha Chemical Industry Co., Ltd. product name “Clehalon”) with a total film thickness of 80 zm was used.
(包装機）  (Packing machine)
呉羽化学工業株式会社製の縦型連続充填包装機 「 K A P 5 0 0 型」 を改良 して、 前記実施の形態で説明 した筒状包装体を製造でき る も の と し た。 縦シール部 S 1 は、 高周波溶着によ り 、 フ ィ ルム F の緣 部 F a と F b を封筒状背貼 り して形成した。  The vertical continuous filling and packaging machine “KAP500 type” manufactured by Kureha Chemical Industry Co., Ltd. has been improved to produce the cylindrical package described in the above embodiment. The vertical seal portion S 1 was formed by applying high frequency welding to the envelope portions of the lower portions Fa and Fb of the film F.
集束部は第 1 0 図 （ A ) に示す金型を用 いた。 封止部 3 は超音波 溶着によ り 行い、 超音波振動を 生 じ さ せる超音波ウェルダー にはジ ルコ ニゥムチタ ン酸鉛粉末焼結体か ら 成る振動子 を用 い、 周波数 4 0 k H z 、 ホー ン 4 の縦振動振幅 1 O iz mの条件で超音波溶着を行な つ た。  The mold shown in Fig. 10 (A) was used for the focusing part. The sealing part 3 is formed by ultrasonic welding, and a vibrator made of a sintered zirconia lead titanate powder is used as an ultrasonic welder for generating ultrasonic vibrations at a frequency of 40 kHz. Ultrasonic welding was performed under the conditions of z and horn 4 with a longitudinal vibration amplitude of 1 Oizm.
(内容物）  (Contents)
飽和食塩水を 1 個の筒状包装体当 り 約 3 8 0 g 充填 した。  Approximately 380 g of saturated saline was filled per cylindrical package.
また、 餅状菓子の原液を 1 個の筒状包装体当 り 約 4 0 0 g 充填 し た。  In addition, about 400 g of the stock solution of rice cake-shaped confectionery was filled per cylindrical package.
〔比較例〕  (Comparative example)
前記実施例 と 同 じ縦型連続充填包装機を使用 し 、 実施例 と 同 じ フ . The same vertical continuous filling and packaging machine as in the previous embodiment was used, and the same .
21 イ ルムを使用 して、 筒状包装体を製造した。  A tubular package was manufactured using 21 films.
ただし、 第 1 0 図 （ D ) に示す U字状の凹部 2 5 、 2 6 を備えた 集束板 2 1 a 、 2 1 b 、 2 2 a 、 2 2 b を用いて、 偏平部 F r を折 り畳み、 第 1 2 図 （ C ) ( D ) に示す封止部を得た。  However, the flat portion Fr is formed by using a focusing plate 21a, 21b, 22a, 22b provided with U-shaped concave portions 25, 26 shown in Fig. 10 (D). By folding, the sealed portions shown in FIGS. 12 (C) and (D) were obtained.
その他の溶着条件、 内容物は実施例と同じと した。  Other welding conditions and contents were the same as in the example.
〔評価方法〕  〔Evaluation method〕
(電気導通試験）  (Electrical continuity test)
飽和食塩水を内容物と した実施例と比較例の筒状包装体をそれぞ れ 1 0 0 個ずつ用意し、 また餅状菓子の原液を内容物と した実施例 と比較例の筒状包装体もそれぞれ 1 0 0個ずつ用意した。  Each of the cylindrical packagings of the example and the comparative example containing saturated saline was prepared, and the cylindrical packagings of the example and the comparative example containing the undiluted solution of the rice cake-shaped confectionery were prepared. 100 bodies were prepared for each.
飽和食塩水を満た した容器内に、 それぞれの筒状包装体の封止部 The sealed part of each tubular package in a container filled with saturated saline
3 を浸し、 導通テスタ一の正負極の一方の針を筒状包装体に刺し、 他方の針を容器内の飽和食塩水に刺し、 電気抵抗を測定した。 測定 された電気抵抗が 3 0 0 k Ω以上ならば、 封止部 3 にピンホールが生 じておらず、 密封部良品と し、 密封良品の割合を密封良品率と した。 3 was immersed, one of the positive and negative electrodes of the conduction tester was stabbed into the cylindrical package, and the other was stabbed into the saturated saline solution in the container, and the electrical resistance was measured. If the measured electrical resistance was 300 kΩ or more, no pinholes were formed in the sealing part 3, the non-defective sealing part was determined, and the ratio of the non-defective sealing part was defined as the non-defective sealing rate.
(湿式加熱試験）  (Wet heating test)
飽和食塩水を内容物と した実施例と比較例の筒状包装体をそれぞ れ 1 0 0 個ずつ用意し、 また餅状菓子の原液を内容物と した実施例 と比較例の筒状包装体もそれぞれ 1 0 0個すつ用意した。  Each of the cylindrical packagings of the example and the comparative example containing saturated saline was prepared, and the cylindrical packagings of the example and the comparative example containing the undiluted solution of the rice cake-shaped confectionery were prepared. I prepared 100 body each.
各筒状包装体を 9 0 で 1 時間熱水加熱した後に、 封止部 3 に破れ が生じているかを 目視で観察した。 その結果、 封止部 3 に破れが生 じていないものを、 封止部良品と し、 封止部良品の割合を封止部良 品率とした。  After each cylindrical package was heated with hot water at 90 for 1 hour, it was visually observed whether or not the sealing portion 3 was broken. As a result, those having no breakage in the sealing part 3 were regarded as non-defective parts in the sealing part, and the ratio of non-defective parts in the sealing part was defined as the non-defective percentage in the sealing part.
〔評価結果〕  〔Evaluation results〕
(実施例） . (Example) .
22  twenty two
• 内容物が飽和食塩水のもの • The contents are saturated saline
密封良品率 = 9 8 %  Good sealing rate = 98%
封止部良品率 = 9 9 %  Non-defective rate of sealing part = 9 9%
• 内容物が餅状菓子の原液のもの  • The contents are those of undiluted mochi confectionery
密封良品率 = 9 9 %  Good sealing rate = 9 9%
封止部良品率 = 1 0 0 %  Non-defective part of sealed part = 1 0 0%
(比較例）  (Comparative example)
• 内容物が飽和食塩水のもの  • The contents are saturated saline
密封良品率 = 5 8 %  Good sealing rate = 5 8%
封止部良品率 = 8 2 %  Non-defective part of sealing part = 8 2%
• 内容物が餅状菓子の原液のもの  • The contents are those of undiluted mochi confectionery
密封良品率 = 7 0 %  Good sealing rate = 70%
封止部良品率 = 9 3 % 産業上の利用可能性  Good sealing rate = 93% Industrial availability
以上のよ う に本発明では、 筒状包装体の両端部の集束部でフ ィ ル ムを溶着させて封止部を形成する際に、 縦シール部が存在していて も、 溶着の際の加圧力が不均一となる こ とがな く 、 封止部を均一に 溶着でき、 ビンホールや破れなどによる密封不良が生じにく く なる。 したがって、 内容物が充填される フ ィ ルム包装体において有用であ る。  As described above, according to the present invention, when the film is welded at the converging portions at both ends of the cylindrical package to form the sealing portion, even if the vertical seal portion is present, The applied pressure is not uneven, the sealing portion can be welded uniformly, and poor sealing due to bin holes or breakage is unlikely to occur. Therefore, it is useful in a film package filled with contents.

Claims

請 求 の 範 囲 The scope of the claims
1 . 内容物が充填される フ ィ ルムの筒状体か らなる筒状包装体であ つて、 前記筒状体には前記筒状体の長手方向へ延びる フ ィ ルムの縁 部どう しを接合して形成された縦シール部が設けられ、 前記筒状体 の長手方向の両端部で前記フ ィ ルムが集束して集束部を形成してお り 、 この集束部は縦シール部を含んでお り 、 前記集束部ではフ ィ ル ムが溶着されて封止部が形成され、 1. A tubular package comprising a tubular body of a film to be filled with contents, wherein the tubular body has edges of the film extending in a longitudinal direction of the tubular body. A vertical seal portion formed by joining is provided, and the film converges at both ends in the longitudinal direction of the tubular body to form a convergence portion. The convergence portion includes a vertical seal portion. In the focusing portion, the film is welded to form a sealing portion,
前記集束部ではフ ィ ルムが折 り畳まれて多数の折り畳み部が形成 され、 前記折り畳み部の一つは前記縦シール部を含んでお り 、 この 縦シール部を含んだ折り畳み部は他の折り畳み部によって挟まれる よう にして集束しており、  In the focusing portion, the film is folded to form a large number of folded portions. One of the folded portions includes the vertical seal portion, and the folded portion including the vertical seal portion is the other. Focused so that it is sandwiched by the folds,
前記封止部は、 前記折り畳み部の重な り方向において、 前記集束 部を挟圧して溶着されている ことを特徴とする筒状包装体。  The tubular package, wherein the sealing portion is welded by sandwiching the convergence portion in a direction in which the folding portion overlaps.
2 . 前記封止部を形成する フ ィ ルムは、 封止部の全領域において溶 着されている請求項 1 記載の筒状包装体。 2. The tubular package according to claim 1, wherein the film forming the sealing portion is welded over the entire region of the sealing portion.
3 . 前記縦シール部は、 前記封止部の表面に現れない位置で折 り畳 み部間に挟まれている請求項 1 記載の筒状包装体。 3. The tubular package according to claim 1, wherein the vertical seal portion is sandwiched between the folded portions at a position that does not appear on the surface of the sealing portion.
4 . 前記縦シール部は、 前記封止部の表面に現れない位置で折 り畳 み部間に挟まれている請求項 2記載の筒状包装体。 4. The tubular package according to claim 2, wherein the vertical seal portion is sandwiched between the folded portions at a position that does not appear on the surface of the sealing portion.
5 . フ ィ ルムの縁部どう しが接合された縦シール部が長手方向に延 びる筒状体を形成する工程と、 5. The vertical seal, where the edges of the film are joined, extends in the longitudinal direction. Forming a cylindrical body,
前記筒状体の内部に内容物を充填する工程と、  A step of filling the inside of the tubular body with contents,
内容物が充填された筒状包装体を、 縦シール部と対面する方向か ら押圧し、 その部分の内容物を除いて偏平部を形成する工程と、 前記偏平部の両端側か ら集束力を与え、 多数の折 り畳み部が形成 し、 前記折り畳み部の一つは前記縦シール部を含んでお り 、 この縦 シール部を含んだ折り畳み部は他の折り畳み部によっ て挟まれるよ うな集束部を形成する工程と、  Pressing the cylindrical package filled with the content from the direction facing the vertical seal portion to form a flat portion except for the content of the portion, and converging force from both ends of the flat portion. A plurality of folds are formed, one of the folds includes the vertical seal, and the fold including the vertical seal is sandwiched by the other folds. Forming a convergence section,
前記集束部を、 折 り畳み部の重な り 方向か ら挟圧して、 前記集束 部において二つの箇所で溶着して二つの封止部を形成する工程と、 前記二つの箇所の間において前記集束部を分離し、 個々 の包装体 を得る工程とを含むことを特徴とする筒状包装体の製造方法。  Pressing the convergence portion from the direction in which the folding portion overlaps, welding the convergence portion at two locations to form two sealing portions; and Separating the convergence part to obtain individual packages.
6 . 前記集束部を形成する工程で、 前記縦シール部が前記集束部の 中央に位置するよ う に、 前記偏平部の平面側か ら、 前記偏平部に案 内力を与える請求項 5記載の筒状包装体の製造方法。 6. The method according to claim 5, wherein, in the step of forming the convergence portion, an internal force is applied to the flat portion from the flat side of the flat portion so that the vertical seal portion is located at the center of the convergence portion. A method for producing a tubular package.
7 . フ ィ ルムの縁部どう しを接合してフ ィ ルムの筒状体の長手方向 へ縦シール部を形成するシール手段と、 前記筒状体の内部に内容物 を充填する手段と、 前記筒状体を前記縦シール部と対面する方向か ら挟圧して筒状体内の内容物を除去して偏平部を形成する し ごき手 段と、 前記偏平部を集束し集束部を形成する集束手段と、 前記集束 部のフィ ルムを二つの個所で溶着する溶着手段と、 前記溶着された 二つの箇所の間で集束部を切断する切断手段とが設けられ、 7. Sealing means for joining the edges of the film together to form a vertical seal in the longitudinal direction of the cylindrical body of the film; means for filling the inside of the cylindrical body with contents; An ironing means for squeezing the cylindrical body from a direction facing the vertical seal portion to remove contents in the cylindrical body to form a flat portion, and converge the flat portion to form a converging portion; Converging means, welding means for welding the film of the converging portion at two locations, and cutting means for cutting the converging portion between the two welded locations.
前記集束手段には、 前記偏平部に前記偏平部の両端側か ら集束力 を与える凹部が形成されてお り 、 こ の凹部の底部は前記偏平部の偏 平面とほぼ直交する平面となってお り 、 この凹部で前記偏平部が集 束させられる ときに、 前記偏平部を構成するフ ィ ルムが折り畳まれ て多数の折 り畳み部が形成され、 前記折り畳み部の一つには前記縦 シール部があ り 、 この縦シール部を含んだ折 り畳み部は他の折り畳 み部によって挟まれるよう に折り畳まれ、 The converging means includes a converging force on the flat portion from both ends of the flat portion. The bottom of the recess is a plane substantially perpendicular to the flat surface of the flat portion. When the flat portion is focused by the recess, the flat portion is formed. The film constituting the above is folded to form a large number of folds, and one of the folds has the vertical seal, and the fold including the vertical seal is the other. Folded so that it is sandwiched by the folding parts,
前記溶着手段には、 前記集束部において折 り畳まれたフ ィ ルムの 重な り方向か ら前記集束部を挟圧する間、 前記集束部のフィ ルムを 二つの箇所溶着する加圧溶着部材が設け られている こ とを特徴とす る筒状包装体の製造装置。  The welding means includes a pressure welding member that welds the film of the convergence portion at two places while nipping the convergence portion from the overlapping direction of the films folded at the convergence portion. An apparatus for manufacturing a tubular package, which is provided.
8 . 前記集束手段の前記凹部の開口部の開 口幅が、 前記平面状の底 部の幅寸法と同じかそれ以下である請求項 7 記載の筒状包装体の製 造装置。 8. The apparatus for manufacturing a tubular package according to claim 7, wherein an opening width of the opening of the concave portion of the focusing means is equal to or smaller than a width dimension of the flat bottom.
9 . 前記加圧溶着手段が超音波ホーンと予備加熱されたアルビンと からなる請求項 7記載の筒状包装体の製造装置。 9. The apparatus for producing a cylindrical package according to claim 7, wherein the pressure welding means comprises an ultrasonic horn and preheated albin.
1 0 . 前記加圧溶着手段が超音波ホーンと予備加熱されたアルビン とからなる請求項 8記載の筒状包装体の製造装置。 10. The apparatus for producing a tubular package according to claim 8, wherein the pressure welding means comprises an ultrasonic horn and preheated albin.
PCT/JP1998/005371 1997-12-05 1998-11-30 Cylindrical package, and method and apparatus for producing the same WO1999029575A1 (en)

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