JP6744741B2 - Storage bag manufacturing method and storage bag manufacturing apparatus - Google Patents

Storage bag manufacturing method and storage bag manufacturing apparatus Download PDF

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Publication number
JP6744741B2
JP6744741B2 JP2016068544A JP2016068544A JP6744741B2 JP 6744741 B2 JP6744741 B2 JP 6744741B2 JP 2016068544 A JP2016068544 A JP 2016068544A JP 2016068544 A JP2016068544 A JP 2016068544A JP 6744741 B2 JP6744741 B2 JP 6744741B2
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Japan
Prior art keywords
heat
resin sheet
welded
bag
heater
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JP2017178371A (en
Inventor
篤史 入倉
篤史 入倉
彦希 梅垣
彦希 梅垣
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TRUMO KABUSHIKI KAISHA
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TRUMO KABUSHIKI KAISHA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • B29C66/53261—Enclosing tubular articles between substantially flat elements
    • B29C66/53262—Enclosing spouts between the walls of bags, e.g. of medical bags
    • B29C66/53263—Enclosing spouts between the walls of bags, e.g. of medical bags said spouts comprising wings, e.g. said spouts being of ship-like or canoe-like form to avoid leaks in the corners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • 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
    • B29C66/345—Progressively making the joint, e.g. starting from the middle
    • B29C66/3452—Making complete joints by combining partial joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—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
    • B29C66/40—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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81463—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B29C66/81465—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint one placed behind the other in a single row in the feed direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • 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
    • B29C66/851—Bag or container making machines
    • B29C66/8511—Bag making machines
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • 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
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/949—Measuring or controlling the joining process by measuring or controlling the time characterised by specific time values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets

Description

本発明は、貯留物を貯留するバッグ本体に、貯留物を吐出するための吐出部材を備えた貯留用バッグの製造方法及び貯留用バッグの製造装置に関する。
The present invention, the bag body for storing retentate, apparatus for manufacturing preparation and storage bags of savings Tomeyo bag having a discharge member for discharging the retentate.

流動食や輸液剤等を貯留した貯留用バッグは、例えば、柔軟な樹脂シートにより構成され貯留物を貯留するバッグ本体と、バッグ本体に溶着されて患者に至るチューブが接続され、このチューブに貯留物を吐出する硬質な吐出部材とを備える。 A storage bag that stores liquid foods, infusions, etc. is, for example, a bag body that is made of a flexible resin sheet and that stores a stored body, and a tube that is welded to the bag body and leads to a patient is connected, and stored in this tube. And a hard ejection member for ejecting an object.

この場合、吐出部材は、貯留物の漏れがないように、樹脂シートに強固に溶着される必要がある。そのため、例えば、特許文献１に開示の吐出部材は、樹脂シートに溶着される被溶着部を略舟型状に形成している。これにより、突出部材の被溶着部は、樹脂シートのシール方向に沿って広い溶着範囲を持ち、樹脂シートに強固に溶着される。 In this case, the discharge member needs to be firmly welded to the resin sheet so that the stored material does not leak. Therefore, for example, in the discharge member disclosed in Patent Document 1, the welded portion welded to the resin sheet is formed in a substantially boat shape. As a result, the welded portion of the protruding member has a wide welding range along the sealing direction of the resin sheet and is firmly welded to the resin sheet.

実開平１−１４４０３７号公報Japanese Utility Model Publication No. 1-144037

ところで、上記のように略舟型状の被溶着部を有する吐出部材は、樹脂シートとの熱シール（溶着）時に、被溶着部の長軸方向に突出した端部において熱が逃げ難い。そのため、被溶着部の端部付近が、長軸方向中央部に比べて簡単に溶融してしまい、溶け出た被溶着部の樹脂が貯留空間で硬化して溶融バリを形成する。この溶融バリは、貯留用バッグの使用時に外力がかかる等の要因により樹脂シートを破断させるおそれがある。また例えば、溶融バリは、貯留用バッグの使用時にバッグ本体の内圧が上昇して被溶着部付近の樹脂シートが広がることで、樹脂シートから剥がれてピンホール等を発生させるおそれがある。 By the way, in the discharge member having the substantially boat-shaped welded portion as described above, during heat sealing (welding) with the resin sheet, it is difficult for heat to escape at the end portion of the welded portion protruding in the long axis direction. Therefore, the vicinity of the end of the welded portion melts more easily than the central portion in the longitudinal direction, and the melted resin of the welded portion hardens in the storage space to form a molten burr. The molten burr may break the resin sheet due to factors such as external force being applied when the storage bag is used. Further, for example, the molten burr may be peeled off from the resin sheet to cause a pinhole or the like when the internal pressure of the bag body rises and the resin sheet near the welded portion spreads when the storage bag is used.

本発明は、上記の課題を解決するためになされたものであって、吐出部材の溶融バリを抑制することで、樹脂シートと吐出部材の溶着状態を良好に保ち得る貯留用バッグの製造方法及び貯留用バッグの製造装置を提供することを目的とする。
The present invention was made to solve the above problems, by suppressing the melt burr of the discharge member, resulting Ru savings Tomeyo method of manufacturing a bag keeping the welding state of the resin sheet and the discharge member satisfactorily And an object of the present invention is to provide a manufacturing apparatus for a storage bag.

前記の目的を達成するために、本発明は、重なり合った樹脂シートの熱シール部の内側に貯留物を貯留する貯留空間を有するバッグ本体と、前記熱シール部に固定される被溶着部を有し、前記貯留空間から前記バッグ本体の外部に前記貯留物を吐出可能な吐出部材と、を備える貯留用バッグの製造方法であって、前記被溶着部は、前記熱シール部の延在方向に沿って長軸を有し、且つ前記延在方向と直交する方向に短軸を有する略舟型状を呈しており、前記製造方法は、重なった前記樹脂シートの間に前記吐出部材を供給し、第１ヒータ部により前記被溶着部と前記樹脂シートとを前記樹脂シートの外側から熱シールする第１シール工程と、前記第１シール工程後に、第２ヒータ部により前記被溶着部が溶着された前記樹脂シートと、前記樹脂シート同士が重なる箇所とをまとめて熱シールして前記バッグ本体の１辺の前記熱シール部を形成する第２シール工程と、を含み、前記第１シール工程では、前記吐出部材の長軸方向の端部及び該端部付近と前記樹脂シートとを熱シールせずに、前記吐出部材の長軸方向の中央部分と前記樹脂シートとを熱シールし、且つ前記被溶着部と前記樹脂シートの溶着と同時に、前記被溶着部の前記各端部から離間した位置の前記樹脂シート同士を熱シールすることを特徴とする。
To achieve the previous SL object, the present invention includes a bag body having a storage space for storing the depot inside of the heat seal portion of the overlapped resin sheets, to be welded portion fixed to the heat seal portion A method of manufacturing a storage bag, comprising: a discharge member capable of discharging the stored material from the storage space to the outside of the bag body, wherein the welded portion is an extending direction of the heat seal portion. Has a long axis along a long axis and a short axis in a direction orthogonal to the extending direction, and has a substantially boat shape, and the manufacturing method supplies the discharge member between the overlapped resin sheets. A first sealing step of heat-sealing the welded portion and the resin sheet from the outside of the resin sheet by the first heater portion, and the welded portion is welded by the second heater portion after the first sealing step. And a second sealing step of collectively heat-sealing the resin sheet and a portion where the resin sheets overlap each other to form the heat-sealing portion on one side of the bag body, the first sealing step In the long-axis direction end portion of the discharge member and the vicinity of the end portion and the resin sheet are not heat-sealed, but the long-axis center portion of the discharge member and the resin sheet are heat-sealed , and Simultaneously with the welding of the welded portion and the resin sheet, the resin sheets at positions separated from the respective end portions of the welded portion are heat-sealed .

上記によれば、この貯留用バッグの製造方法では、第１シール工程において、吐出部材の長軸方向の端部及び該端部付近と前記樹脂シートとを熱シールせずに、吐出部材の長軸方向の中央部分と樹脂シートとを熱シールすることで、第２シール工程後に、吐出部材の長軸方向の各端部の貯留空間側の角部に形成される溶融バリの体積を４．４ｍｍ3以下とすることができる。従って、溶融バリによるバッグ本体の損傷を抑制して、樹脂シートと吐出部材の溶着状態を良好に保つことができる。 According to the above, in the method for manufacturing the storage bag, in the first sealing step, the length of the discharge member is increased without heat-sealing the end portion in the long axis direction of the discharge member and the vicinity of the end portion with the resin sheet. By heat-sealing the central portion in the axial direction and the resin sheet, the volume of the molten burr formed at the corners on the storage space side at the ends in the long axis direction of the discharge member after the second sealing step is reduced to 4. It can be 4 mm 3 or less. Therefore, it is possible to suppress the damage to the bag body due to the molten burrs and to maintain a good welded state of the resin sheet and the ejection member.

また、被溶着部の各端部から離間した位置の樹脂シート同士を熱シールすることで、第２シール工程後には、バッグ本体の熱シール部にも２度熱シールした部位が形成される。そのため、貯留用バッグは、吐出部材の近くで樹脂シートを強固に溶着して、吐出部材の姿勢の崩れ等を抑制して安定的な熱シール状態で形成される。その一方で、被溶着部の各端部の近くは、第１シール工程において非加熱となるので、端部の溶融を防ぐことができる。
 Further, by heat-sealing the resin sheets at positions separated from the respective end portions of the welded portion, the heat-sealed portion of the bag body is also provided with a twice heat-sealed portion after the second sealing step. Therefore, the storage bag is formed in a stable heat-sealed state by firmly welding the resin sheet in the vicinity of the ejection member to suppress the posture of the ejection member from collapsing. On the other hand, since the vicinity of each end of the welded part is not heated in the first sealing step, it is possible to prevent the end from melting.

さらに、前記の目的を達成するために、本発明は、重なり合った樹脂シートの熱シール部の内側に貯留物を貯留する貯留空間を有するバッグ本体と、前記熱シール部に固定される被溶着部を有し、前記貯留空間から前記バッグ本体の外部に前記貯留物を吐出可能な吐出部材と、を備える貯留用バッグの製造装置であって、前記被溶着部は、前記熱シール部の延在方向に沿って長軸を有し、且つ前記延在方向と直交する方向に短軸を有する略舟型状を呈しており、前記製造装置は、重なった前記樹脂シートの間に前記吐出部材を供給し、前記被溶着部と前記樹脂シートとを前記樹脂シートの外側から熱シールする一対の金型を有する第１ヒータ部と、前記第１ヒータ部による熱シール後に、前記被溶着部が溶着された前記樹脂シートと、前記樹脂シート同士が重なる箇所とをまとめて熱シールして前記バッグ本体の１辺の前記熱シール部を形成する第２ヒータ部と、を含み、前記一対の金型は、前記吐出部材の長軸方向の中央部分と前記樹脂シートとを熱シールする加熱部と、前記吐出部材の長軸方向の端部及び該端部付近と前記樹脂シートとを熱シールしない非加熱部と、を含み、前記一対の金型は、前記非加熱部よりも対向する金型に向かって突出するシート加熱部を有し、前記シート加熱部は、前記樹脂シートの溶着と同時に、前記被溶着部の前記各端部から離間した位置の前記樹脂シート同士を熱シールすることを特徴とする。
Further, in order to achieve the above object, the present invention provides a bag main body having a storage space for storing a storage material inside a heat seal portion of overlapping resin sheets, and a welded portion fixed to the heat seal portion. And a discharge member capable of discharging the stored material from the storage space to the outside of the bag body, wherein the welded part is an extension of the heat seal part. Having a long axis along the direction, and has a substantially boat shape having a short axis in the direction orthogonal to the extending direction, the manufacturing apparatus, the discharge member between the resin sheets overlapped. A first heater part having a pair of molds for supplying and heat-sealing the welded part and the resin sheet from the outside of the resin sheet; and the welded part is welded after heat sealing by the first heater part. A pair of molds including a second heater portion that collectively heat seals the resin sheet that has been subjected to heat treatment and a portion where the resin sheets overlap each other to form the heat seal portion on one side of the bag body. Is a heating unit that heat-seals the central portion of the ejection member in the long axis direction and the resin sheet, and does not heat-seal the longitudinal end portion of the ejection member and the vicinity thereof to the resin sheet. seen including a heating unit, a pair of the mold has a sheet heating section projecting toward the die opposing than the non-heated portion, the sheet heating unit, at the same time as the welding of the resin sheet The heat-sealing is performed between the resin sheets at positions separated from the respective ends of the welded portion .

上記によれば、この貯留用バッグの製造装置では、一対の金型が吐出部材の長軸方向の中央部分と樹脂シートとを熱シールする加熱部と、吐出部材の長軸方向の端部及び該端部付近と前記樹脂シートとを熱シールしない非加熱部と、を含むことで、第２ヒータ部による熱シール後に、吐出部材の長軸方向の各端部の貯留空間側の角部に形成される溶融バリの体積を４．４ｍｍ3以下とすることができる。従って、溶融バリによるバッグ本体の損傷を抑制して、樹脂シートと吐出部材の溶着状態を良好に保つことができる。 According to the above, in the storage bag manufacturing apparatus, the pair of molds heat-seals the central portion of the discharge member in the long-axis direction and the resin sheet, and the end portion of the discharge member in the long-axis direction. By including a non-heated portion that does not heat seal the vicinity of the end portion and the resin sheet, after the heat sealing by the second heater portion, at the corner portion on the storage space side of each end portion in the long axis direction of the discharge member. The volume of the formed molten burr can be 4.4 mm 3 or less. Therefore, it is possible to suppress the damage to the bag body due to the molten burrs and to maintain a good welded state of the resin sheet and the ejection member.

また、第２ヒータ部の熱シール後には、バッグ本体の熱シール部にも２度熱シールした部位が形成されるため、吐出部材の姿勢の崩れ等を抑制して安定的な熱シール状態となる。
 Further, after the second heater portion is heat-sealed, the heat-sealing portion of the bag body is also formed with a twice heat-sealed portion, so that the posture of the discharge member is prevented from collapsing and a stable heat-sealing state is achieved. Become.

本発明に係る貯留用バッグの製造方法及び貯留用バッグの製造装置によれば、吐出部材の溶融バリを抑制することで、樹脂シートと吐出部材の溶着状態を良好に保つことができる。
According to the method and apparatus for manufacturing a storage bag engagement Ru savings Tomeyo bag to the present invention, by suppressing the melt burr of the discharge member, it is possible to keep the deposition conditions of the resin sheet and the discharge member good.

本発明の一実施形態に係る貯留用バッグの全体構成を示す説明図である。It is an explanatory view showing the whole storage bag composition concerning one embodiment of the present invention. 図２Ａは、図１のスパウトの斜視図であり、図２Ｂは、図２Ａのスパウトと樹脂シートの熱シール状態を示す説明図である。2A is a perspective view of the spout of FIG. 1, and FIG. 2B is an explanatory view showing a heat-sealed state of the spout and the resin sheet of FIG. 2A. 図３Ａは、第１構成例に係るスパウトを示す平面図であり、図３Ｂは、第２構成例に係るスパウトを示す平面図であり、図３Ｃは、第３構成例に係るスパウトを示す平面図である。3A is a plan view showing a spout according to a first configuration example, FIG. 3B is a plan view showing a spout according to a second configuration example, and FIG. 3C is a plan view showing a spout according to a third configuration example. It is a figure. 図１の貯留用バッグの製造装置を概略的に示す斜視図である。It is a perspective view which shows schematically the manufacturing apparatus of the storage bag of FIG. 図４の部材ヒータを拡大して示す部分斜視図である。It is a partial perspective view which expands and shows the member heater of FIG. 図４の部材ヒータ及びトップヒータによる熱シールの状態を示す部分斜視図である。It is a partial perspective view which shows the state of heat sealing by the member heater and top heater of FIG. 図７Ａは、本実施形態に係る製造装置により熱シールされたトップシール部の状態を示す説明図であり、図７Ｂは、従来の製造装置により熱シールされたトップシール部の状態を示す説明図である。FIG. 7A is an explanatory diagram showing a state of the top seal portion heat-sealed by the manufacturing apparatus according to the present embodiment, and FIG. 7B is an explanatory diagram showing a state of the top seal portion heat-sealed by the conventional manufacturing apparatus. Is. 図８Ａは、実施例１に係る従来品の溶融バリの寸法と改良品の溶融バリの寸法を示す棒グラフであり、図８Ｂは、従来品の溶融バリの体積と改良品の溶融バリの体積を示す点グラフである。FIG. 8A is a bar graph showing the size of the molten burr of the conventional product and the size of the molten burr of the improved product according to Example 1, and FIG. 8B shows the volume of the molten burr of the conventional product and the volume of the molten burr of the improved product. It is a point graph shown. 実施例２に係る従来品と改良品の屈曲操作による破れを評価した表である。9 is a table in which breakage due to bending operation of a conventional product and an improved product according to Example 2 is evaluated. 実施例３に係る従来品と改良品の破袋圧力の関係を示す棒グラフである。9 is a bar graph showing the relationship between the bag breaking pressure of a conventional product and an improved product according to Example 3.

以下、本発明に係る貯留用バッグを製造する製造方法及び製造装置について好適な実施形態を挙げ、添付の図面を参照して詳細に説明する。
Hereinafter, like the preferred embodiment for a manufacturing method and a manufacturing apparatus for manufacturing the engagement Ru savings Tomeyo bag to the present invention will be described in detail with reference to the accompanying drawings.

本発明の一実施形態に係る貯留用バッグ１０は、図１に示すように、樹脂シート１６を袋状に成形して構成され、その内部に流動食や輸液剤（栄養剤、薬剤等）の貯留物を貯留した状態で提供される。例えば、固形物を飲み込むことが困難な患者に対しては、図示しないチューブ組立体のチューブを胃の中に挿入する一方で、体外に露出したチューブの端部に貯留用バッグ１０を接続して流動経路を構築することで、貯留物である流動食を体内に供給する。 As shown in FIG. 1, a storage bag 10 according to an embodiment of the present invention is formed by molding a resin sheet 16 into a bag shape, and a liquid food and an infusion agent (nutrient agent, drug, etc.) are stored therein. It is provided in the state where the stored material is stored. For example, for a patient who has difficulty swallowing solids, the tube of a tube assembly (not shown) is inserted into the stomach, while the storage bag 10 is connected to the end of the tube exposed outside the body. By constructing a flow path, the liquid food that is a reservoir is supplied to the body.

貯留用バッグ１０は、貯留物を貯留する貯留空間１２ａを有するバッグ本体１２と、バッグ本体１２に溶着されるスパウト１４（吐出部材）とを備える。このスパウト１４は、貯留空間１２ａに貯留される貯留物を貯留用バッグ１０の外部に流出させる。また、スパウト１４は、バッグ本体１２よりも硬質に形成されることで、流動経路の構築時に、チューブ組立体との接続を容易化させる。 The storage bag 10 includes a bag main body 12 having a storage space 12a for storing a storage product, and a spout 14 (discharging member) welded to the bag main body 12. The spout 14 causes the stored material stored in the storage space 12 a to flow out of the storage bag 10. Further, since the spout 14 is formed to be harder than the bag body 12, the spout 14 facilitates connection with the tube assembly when the flow path is constructed.

バッグ本体１２は、例えば、正面視で長方形状に形成される。このバッグ本体１２は、後述する製造装置６０により、柔軟性を有する１枚以上の樹脂シート１６が重ねられて、所定部位（上下左右の４辺）が熱シール及び切断されることで製袋される。これにより、バッグ本体１２は、４つの熱シール部１８（トップシール部２０、ボトムシール部２２、一対のサイドシール部２４）を有する。 The bag body 12 is, for example, formed in a rectangular shape in a front view. This bag body 12 is made into a bag by stacking one or more flexible resin sheets 16 and heat-sealing and cutting predetermined parts (upper, lower, left, and right sides) by a manufacturing apparatus 60 described later. It As a result, the bag body 12 has the four heat seal portions 18 (the top seal portion 20, the bottom seal portion 22, and the pair of side seal portions 24).

バッグ本体１２の内部、すなわち熱シール部１８の内側には、貯留物を所定量収容可能な容積を有する上記の貯留空間１２ａが形成されている。例えば、貯留物として流動食を貯留する貯留用バッグ１０は、１００ｇ〜６００ｇ程度の容積の貯留空間１２ａを有する。勿論、貯留空間１２ａの容積は、貯留物の種類や用途に応じて適宜設計されてよい。また、バッグ本体１２は、ボトムシール部２２側やサイドシール部２４側に容積を確保するためのマチ（底面部や側面部）が設けられていてもよい。 Inside the bag body 12, that is, inside the heat seal portion 18, the above-mentioned storage space 12a having a volume capable of accommodating a predetermined amount of stored matter is formed. For example, the storage bag 10 that stores liquid food as a storage has a storage space 12a having a volume of about 100 g to 600 g. Of course, the volume of the storage space 12a may be appropriately designed according to the type and use of the storage. Further, the bag body 12 may be provided with a gusset (bottom surface portion or side surface portion) for securing a volume on the bottom seal portion 22 side or the side seal portion 24 side.

バッグ本体１２の樹脂シート１６を構成する材料は、貯留物を良好に真空パックし得る樹脂材料が選択されることが好ましい。この種の樹脂材料は、特に限定されるものではなく、例えば、ポリエチレン、ポリプロピレン、ポリ塩化ビニル、ポリスチレン、ＡＳ樹脂、ＡＢＳ樹脂、ポリエチレンテレフタレート、ポリアミド、ポリカーボネート、ポリアセタール等の熱可塑性樹脂があげられる。或いは、樹脂シート１６は、異なる樹脂材料を複合してシート状に形成したものや、複数の樹脂材料のシートを積層したものを適用してもよい。 As a material forming the resin sheet 16 of the bag body 12, it is preferable to select a resin material capable of vacuum-packing the stored material well. The resin material of this type is not particularly limited, and examples thereof include thermoplastic resins such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, AS resin, ABS resin, polyethylene terephthalate, polyamide, polycarbonate, and polyacetal. Alternatively, the resin sheet 16 may be formed by combining different resin materials into a sheet shape or by laminating a plurality of resin material sheets.

一方、貯留用バッグ１０のスパウト１４は、バッグ本体１２のトップシール部２０の形成時に熱シールされることで、樹脂シート１６に溶着されバッグ本体１２に一体化する。スパウト１４を構成する材料は、上述したようにバッグ本体１２よりも硬質な樹脂材料が適用されることが好ましい。この種の樹脂材料は、特に限定されるものではなく、例えば、ポリエチレン、ポリプロピレン、ポリ塩化ビニル、ポリスチレン、ＡＳ樹脂、ＡＢＳ樹脂、ポリエチレンテレフタレート、ポリアミド、ポリカーボネート、ポリアセタール等の熱可塑性樹脂を適用するとよい。或いは、スパウト１４は、複数の樹脂材料を混合することで、所望の硬質性を得てもよい。 On the other hand, the spout 14 of the storage bag 10 is heat-sealed when the top seal portion 20 of the bag body 12 is formed, and thus is welded to the resin sheet 16 and integrated with the bag body 12. As a material forming the spout 14, as described above, it is preferable to use a resin material that is harder than the bag body 12. This type of resin material is not particularly limited, and for example, a thermoplastic resin such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, AS resin, ABS resin, polyethylene terephthalate, polyamide, polycarbonate, polyacetal may be applied. .. Alternatively, the spout 14 may obtain desired hardness by mixing a plurality of resin materials.

このスパウト１４は、図２Ａに示すように、チューブ組立体が装着される突出部２６と、バッグ本体１２に取り付けられる被溶着部２８とを有する。突出部２６及び被溶着部２８の中心部には、スパウト１４の上下方向（軸方向）に沿って、貯留物の吐出路３０が貫通形成されている。 As shown in FIG. 2A, the spout 14 has a protruding portion 26 to which the tube assembly is mounted and a welded portion 28 to be attached to the bag body 12. A discharge passage 30 for the stored material is formed through the central portions of the protruding portion 26 and the welded portion 28 along the vertical direction (axial direction) of the spout 14.

突出部２６は、チューブ組立体が装着される先端ノズル部３２と、先端ノズル部３２の基端に連なる雄ネジ部３４とを有する。雄ネジ部３４は、図示しない雌ネジ部を有するチューブ組立体の端子がねじ込まれる部位であり、貯留用バッグ１０及びチューブ組立体の規格によっては設けられなくてもよい。 The projecting portion 26 has a tip nozzle portion 32 to which the tube assembly is attached, and a male screw portion 34 that is continuous with the base end of the tip nozzle portion 32. The male screw portion 34 is a portion into which a terminal of a tube assembly having a female screw portion (not shown) is screwed, and may not be provided depending on the standards of the storage bag 10 and the tube assembly.

先端ノズル部３２は、軸心部に吐出路３０を有する円筒状に形成され、その先端部に貯留物を吐出する吐出口３２ａを有する。また、先端ノズル部３２の外形は、雄ネジ部３４側から先端に向かって緩やかに先細りとなるテーパ状に形成されている。この先端ノズル部３２には、貯留用バッグ１０の使用前に、吐出口３２ａを閉塞して貯留物の吐出を遮断するキャップ３６が取り付けられる（図１参照）。 The tip nozzle portion 32 is formed in a cylindrical shape having the discharge passage 30 in the axial center portion, and has a discharge port 32a for discharging the stored matter at the tip portion thereof. Further, the outer shape of the tip nozzle portion 32 is formed in a taper shape that gradually tapers from the male screw portion 34 side toward the tip. Before the storage bag 10 is used, a cap 36 is attached to the tip nozzle portion 32 to close the discharge port 32a and block the discharge of the storage (see FIG. 1).

雄ネジ部３４は、先端ノズル部３２と被溶着部２８の間に設けられ、被溶着部２８の先端面から短く突出している。この雄ネジ部３４は、先端ノズル部３２に比べて太径の円筒状に形成され、その外周面には周方向に巻回したネジ山３４ａが設けられている。 The male screw portion 34 is provided between the tip nozzle portion 32 and the welded portion 28, and shortly projects from the tip end surface of the welded portion 28. The male screw portion 34 is formed in a cylindrical shape having a diameter larger than that of the tip nozzle portion 32, and a screw thread 34a wound in the circumferential direction is provided on the outer peripheral surface thereof.

また、スパウト１４の被溶着部２８は、平面視（吐出口３２ａを臨む矢視）で、トップシール部２０の延在方向に沿って長軸を有し、延在方向と直交する方向に短軸を有する略菱形状に形成されている。被溶着部２８は、トップシール部２０の方向に沿って長いことで、広い範囲にわたって樹脂シート１６に溶着され得る部位となっている。また、被溶着部２８は、側面視で、スパウト１４の軸方向に充分な厚みを有しており、全体的な外観として略舟型状を呈している。 In addition, the welded portion 28 of the spout 14 has a major axis along the extending direction of the top seal portion 20 and has a short axis in a direction orthogonal to the extending direction in plan view (as viewed from the direction of the ejection port 32a). It is formed in a substantially rhombic shape having an axis. The welded portion 28 is a portion that can be welded to the resin sheet 16 over a wide range by being long in the direction of the top seal portion 20. Further, the welded portion 28 has a sufficient thickness in the axial direction of the spout 14 in a side view, and has a substantially boat shape as an overall appearance.

被溶着部２８は、軸方向に延びる筒状部３８と、筒状部３８の外周面に連結されると共に筒状部３８の周囲で格子状に形成された舟型本体４０とを有する。また、舟型本体４０の先端側（雄ネジ部３４側）には、雄ネジ部３４の基端に連なり、舟型本体４０よりも僅かに大きな菱形状の天板４２が設けられている。 The welded portion 28 has a tubular portion 38 extending in the axial direction, and a boat-shaped main body 40 connected to the outer peripheral surface of the tubular portion 38 and formed in a lattice around the tubular portion 38. Further, a diamond-shaped top plate 42, which is continuous with the base end of the male screw portion 34 and is slightly larger than the boat-shaped body 40, is provided on the tip side (the male screw portion 34 side) of the boat type body 40.

筒状部３８は、雄ネジ部３４の外径と同一の外径を有する円筒状に形成され、その内部に貯留物の吐出路３０が貫通形成されている。そして、筒状部３８の基端（スパウト１４の基端面）には、貯留空間１２ａの貯留物を吐出路３０に流入させる流入口３８ａが設けられている。 The tubular portion 38 is formed into a cylindrical shape having the same outer diameter as the outer diameter of the male screw portion 34, and the discharge passage 30 for the stored substance is formed therethrough. An inlet port 38 a is provided at the base end of the tubular portion 38 (the base end surface of the spout 14) to allow the stored matter in the storage space 12 a to flow into the discharge passage 30.

天板４２は、突出部２６の軸方向と直交する方向に延びており、バッグ本体１２と突出部２６の境界を構成している。この天板４２は、長軸方向及び短軸方向の角部がＲ状に形成され、また短軸方向に対し長軸方向が比較的長いことで、トップシール部２０の延在方向に沿って扁平な菱形状を呈している。天板４２の長軸側（図２Ａ中の左右両側）の端部は、舟型本体４０の長軸方向の両端部４０ａ、４０ｂに一致する一方、天板４２の外縁及び短軸側（図２Ａ中の紙面手前及び紙面奥方向）の端部は、舟型本体４０よりも若干突出している。この天板４２の突出部分の基端面には樹脂シート１６が溶着される。 The top plate 42 extends in a direction orthogonal to the axial direction of the protrusion 26, and forms a boundary between the bag body 12 and the protrusion 26. The top plate 42 has corner portions in the major axis direction and the minor axis direction formed in an R shape, and the major axis direction is relatively long with respect to the minor axis direction, so that the top seal portion 20 extends along the extending direction. It has a flat diamond shape. The ends of the top plate 42 on the major axis side (both left and right in FIG. 2A) coincide with both ends 40a, 40b of the boat main body 40 in the major axis direction, while the outer edge and the minor axis side of the top plate 42 (see FIG. The ends of 2A in the front and the rear of the paper surface are slightly projected from the boat main body 40. The resin sheet 16 is welded to the base end surface of the protruding portion of the top plate 42.

舟型本体４０は、複数の突片４４が三次元的に骨組みされた部位であり、この突片４４の突出端４４ａと樹脂シート１６が溶着されることで、バッグ本体１２とスパウト１４の溶着がなされる。各突片４４の突出端４４ａは、舟型本体４０の外観を構成し、且つ各突片４４同士の間には、隙間４６が形成されている。 The boat-shaped main body 40 is a region in which a plurality of projecting pieces 44 are three-dimensionally framed, and by welding the projecting end 44 a of the projecting piece 44 and the resin sheet 16, the bag body 12 and the spout 14 are welded. Is done. The protruding end 44 a of each protruding piece 44 constitutes the outer appearance of the boat-shaped main body 40, and a gap 46 is formed between each protruding piece 44.

具体的に、複数の突片４４は、筒状部３８の外周面から天板４２に対し平行に延びると共に、筒状部３８の軸方向に平行に延びることで、舟型本体４０全体を格子状としている。なお、舟型本体４０の両端部４０ａ、４０ｂは、筒状部３８から長軸方向に長く延びる一対の対角突片４８、４８により構成される。一方、隙間４６は、隣接する突片４４の間の熱伝達率を低減して、突出端４４ａの溶融を促進する。バッグ本体１２の樹脂シート１６は、隙間４６を除いた舟型本体４０の外側部（すなわち、各突片４４の突出端４４ａ）に熱シールされることで、強固に溶着される。 Specifically, the plurality of protrusions 44 extend parallel to the top plate 42 from the outer peripheral surface of the tubular portion 38, and extend parallel to the axial direction of the tubular portion 38, so that the boat-shaped main body 40 is entirely latticed. It is in a state. Both ends 40a, 40b of the boat-shaped main body 40 are composed of a pair of diagonal protrusions 48, 48 extending in a long axis direction from the tubular portion 38. On the other hand, the gap 46 reduces the heat transfer coefficient between the adjacent protrusions 44 and promotes melting of the protruding end 44a. The resin sheet 16 of the bag main body 12 is heat-sealed to the outer portion of the boat main body 40 (that is, the protruding end 44a of each protruding piece 44) excluding the gap 46, and thus is firmly welded.

また、舟型本体４０の両端部４０ａ、４０ｂには、一対の羽根５２、５２が各々外側に向かって突出形成されている。一対の羽根５２、５２は、薄板状に形成され、一対の対角突片４８、４８の両端部に連なっている。各羽根５２は、樹脂シート１６の熱シール時における溶着熱により溶融して、舟型本体４０の長軸方向の両端付近の樹脂シート１６のシール力を高める。 Further, a pair of blades 52, 52 are formed on both ends 40a, 40b of the boat main body 40 so as to project outward. The pair of blades 52, 52 are formed in a thin plate shape, and are connected to both ends of the pair of diagonal projection pieces 48, 48. Each blade 52 is melted by the heat of fusion when the resin sheet 16 is heat-sealed, and enhances the sealing force of the resin sheet 16 near both ends in the long axis direction of the boat main body 40.

そして、トップシール部２０は、図２Ｂに示すように、重なった樹脂シート１６の間に被溶着部２８が溶着された吐出部材シール部５４と、樹脂シート１６同士のみが溶着されたシートシール部５６とを有するように形成される。さらに、吐出部材シール部５４は、樹脂シート１６との間で熱シールが１度だけなされる第１溶着部５４ａと、熱シールが２度なされる第２溶着部５４ｂとを有する。具体的には、第１溶着部５４ａは、舟型本体４０の両端部４０ａ、４０ｂ及び両端部４０ａ、４０ｂ付近で上下方向（筒状部３８の軸方向）に沿って設けられ、第２溶着部５４ｂは、第１溶着部５４ａの形成範囲以外（舟型本体４０の長軸方向中央部）に設けられる。 As shown in FIG. 2B, the top seal portion 20 includes a discharge member seal portion 54 in which the welded portion 28 is welded between the overlapping resin sheets 16 and a sheet seal portion in which only the resin sheets 16 are welded to each other. And 56. Further, the discharge member sealing portion 54 has a first welding portion 54a that is heat-sealed with the resin sheet 16 only once, and a second welding portion 54b that is heat-sealed twice. Specifically, the first welded portion 54a is provided in the vertical direction (axial direction of the tubular portion 38) near both ends 40a, 40b and both ends 40a, 40b of the boat main body 40, and the second welded portion 54a is provided. The portion 54b is provided outside the formation range of the first welded portion 54a (the central portion in the longitudinal direction of the boat main body 40).

ここで、舟型本体４０の両端部４０ａ、４０ｂ（角部）付近は、舟型本体４０の中でも薄肉に形成されており、後記の一対のヒータブロックに挟まれると熱が逃げ難いため、舟型本体４０の長軸方向中央部に比べて溶融し易い。そのため、仮に熱シールが２度行われると、構成する樹脂材料が容易に溶融して、溶融バリを多量に生じさせる。 Here, the vicinity of both ends 40a, 40b (corners) of the boat-shaped main body 40 is formed to be thin among the boat-shaped main body 40, and heat is difficult to escape when sandwiched between a pair of heater blocks described later. It is easier to melt than the central portion of the mold body 40 in the long axis direction. Therefore, if heat sealing is performed twice, the resin material that constitutes it is easily melted, and a large amount of molten burr is generated.

これに対し、本実施形態の舟型本体４０の両端部４０ａ、４０ｂは、第１溶着部５４ａの形成箇所であり、溶着が１度行われるだけなので、その溶融度合が抑えられて樹脂シート１６に溶着される。これにより、熱シール時に、被溶着部２８の両端部４０ａ、４０ｂ（特に、貯留空間１２ａ側の角部）の溶融が抑制され、溶融バリが大幅に少なくなる又は殆どなくなる。 On the other hand, both end portions 40a and 40b of the boat-shaped main body 40 of the present embodiment are the locations where the first welded portion 54a is formed, and since the welding is performed only once, the degree of melting is suppressed and the resin sheet 16 is prevented. Is welded to. As a result, during heat sealing, melting of both ends 40a, 40b of the welded part 28 (particularly, the corners on the side of the storage space 12a) is suppressed, and melting burrs are significantly reduced or almost eliminated.

また、シートシール部５６も、樹脂シート１６同士が１度だけ熱シールされる第１溶着部５６ａと、樹脂シート１６同士が２度熱シールされる第２溶着部５６ｂとを有する。第１溶着部５６ａは、スパウト１４（被溶着部２８）の両端部４０ａ、４０ｂに各々隣接する端部近位領域に設けられると共に、第２溶着部５６ｂを挟んでトップシール部２０の延在方向両端部まで延設される。すなわち、第１溶着部５６ａは、シートシール部５６のうち第２溶着部５４ｂ以外の大部分に設けられる。 The sheet seal portion 56 also has a first welded portion 56a where the resin sheets 16 are heat-sealed only once, and a second welded portion 56b where the resin sheets 16 are heat-sealed twice. The first welded portion 56a is provided in an end proximal region adjacent to both ends 40a, 40b of the spout 14 (the welded portion 28), and the top seal portion 20 extends with the second welded portion 56b interposed therebetween. It is extended to both ends in the direction. That is, the first welded portion 56a is provided on most of the seat seal portion 56 except the second welded portion 54b.

一方、第２溶着部５６ｂは、端部近位領域に隣接する隣接領域に設けられ、スパウト１４から所定間隔離れた位置に形成される。この第２溶着部５６ｂは、トップシール部２０の延在方向に沿って比較的短い範囲に形成されている。 On the other hand, the second welded portion 56b is provided in an adjacent region adjacent to the end proximal region and is formed at a position separated from the spout 14 by a predetermined distance. The second welded portion 56b is formed in a relatively short range along the extending direction of the top seal portion 20.

本実施形態に係るバッグ本体１２及びスパウト１４は、基本的には以上のように構成される。なお、スパウト１４（被溶着部２８）の構成は上記に限定されないことは勿論である。例えば、被溶着部２８は、上述した突片４４を備えない、滑らかな外周面に形成されていてもよい。また例えば、被溶着部２８の外形は、図３Ａ〜図３Ｃに示す第１〜第３構成例の略舟型状であってもよい。 The bag body 12 and the spout 14 according to this embodiment are basically configured as described above. Needless to say, the structure of the spout 14 (welded portion 28) is not limited to the above. For example, the welded portion 28 may be formed on a smooth outer peripheral surface that does not include the protruding piece 44 described above. Further, for example, the outer shape of the welded portion 28 may be a substantially boat shape of the first to third configuration examples illustrated in FIGS. 3A to 3C.

具体的に、第１構成例に係る被溶着部２８Ａは、図３Ａに示す平面視で、被溶着部２８の長軸方向の長さが短軸方向の長さよりも若干だけ長い（正方形に近い）菱形状に形成されている。このように本明細書では、トップシール部２０の延在方向に沿った長さが短くても、舟型状に当てはまるものとする。 Specifically, in the welded portion 28A according to the first configuration example, in the plan view shown in FIG. 3A, the length of the welded portion 28 in the major axis direction is slightly longer than the length in the minor axis direction (close to a square). ) It is formed in a diamond shape. As described above, in the present specification, even if the length of the top seal portion 20 along the extending direction is short, the top seal portion 20 is applied in a boat shape.

また、第２構成例に係る被溶着部２８Ｂは、図３Ｂに示す平面視で、六角状に形成されてトップシール部２０の延在方向に沿って扁平に形成されている。このように本明細書では、多角形状に形成されていても舟型状に当てはまるものとする。 Further, the welded portion 28B according to the second configuration example is formed in a hexagonal shape and is flat along the extending direction of the top seal portion 20 in the plan view shown in FIG. 3B. As described above, in the present specification, a boat shape is applied even if the polygonal shape is formed.

さらに、第３構成例に係る被溶着部２８Ｃは、図３Ｃに示す平面視で、中心部が円形状で左右方向に一対の翼状部５８、５８が突出した形状となっている。翼状部５８は、突出方向に向かって幅狭となるテーパ状に形成されているとよい。このように本明細書では、翼状部５８が設けられたものでも舟型状に当てはまるものとする。 Further, the welded portion 28C according to the third configuration example has a circular center portion and a pair of blade-shaped portions 58, 58 protruding in the left-right direction in a plan view shown in FIG. 3C. The wing-shaped portion 58 is preferably formed in a tapered shape that narrows in the protruding direction. As described above, in the present specification, a ship provided with the wing-shaped portion 58 is also applicable in a boat shape.

次に図４を参照して、本実施形態に係る貯留用バッグ１０の製造装置６０及び製造方法について説明する。貯留用バッグ１０は、樹脂シート１６を成形しながら貯留物を充填する製造装置６０（所謂、縦型製袋充填包装機）を使用して製造される。この製造装置６０は、シート供給部６２、シート搬送部６４、ヒータ部６６及び充填部６８を備える。 Next, with reference to FIG. 4, a manufacturing apparatus 60 and a manufacturing method for the storage bag 10 according to the present embodiment will be described. The storage bag 10 is manufactured using a manufacturing apparatus 60 (a so-called vertical bag-making filling and packaging machine) that fills the stored material while molding the resin sheet 16. The manufacturing apparatus 60 includes a sheet supply unit 62, a sheet conveyance unit 64, a heater unit 66, and a filling unit 68.

製造装置６０のシート供給部６２は、図示しない回転モータにより回転自在な支持軸６２ａを有し、この支持軸６２ａには、樹脂シート１６を巻きつけたロール７０がセットされる。樹脂シート１６が巻かれるロール７０の幅は、成形される貯留用バッグ１０の長辺（サイドシール部２４）の長さの２倍以上となっている。シート供給部６２は、支持軸６２ａを回転して、１枚の連続する樹脂シート１６をロール７０から送出して下流側に供給する。 The sheet supply unit 62 of the manufacturing apparatus 60 has a support shaft 62a rotatable by a rotation motor (not shown), and the roll 70 around which the resin sheet 16 is wound is set on the support shaft 62a. The width of the roll 70 around which the resin sheet 16 is wound is at least twice the length of the long side (side seal portion 24) of the storage bag 10 to be molded. The sheet supply unit 62 rotates the support shaft 62a to feed one continuous resin sheet 16 from the roll 70 and feed the resin sheet 16 to the downstream side.

製造装置６０のシート搬送部６４は、複数の従動ローラ６４ａ及び一対の送りローラ６４ｂ、６４ｂにより樹脂シート１６の搬送経路を構成し、連続する樹脂シート１６を間欠的に搬送する。従動ローラ６４ａは、例えば、折り畳み前の樹脂シート１６に皺等が生じないように、テンションをかける。一対の送りローラ６４ｂ、６４ｂは、トップヒータ７８及びボトムヒータ８０の下方（下流）側に設けられ、樹脂シート１６を挟み込んだ状態で図示しない駆動源により回転することで樹脂シート１６を下方に送出する。この一対の送りローラ６４ｂ、６４ｂは、１回の間欠駆動により、貯留用バッグ１０の短辺（トップシール部２０、ボトムシール部２２）に応じた長さで樹脂シート１６を送り出す。 The sheet conveying unit 64 of the manufacturing apparatus 60 constitutes a conveying path for the resin sheet 16 by the plurality of driven rollers 64a and the pair of feed rollers 64b, 64b, and conveys the continuous resin sheet 16 intermittently. The driven roller 64a applies, for example, tension so that the resin sheet 16 before folding is not wrinkled. The pair of feed rollers 64b, 64b are provided on the lower side (downstream) of the top heater 78 and the bottom heater 80, and the resin sheet 16 is delivered downward by being rotated by a drive source (not shown) while sandwiching the resin sheet 16. .. The pair of feed rollers 64b, 64b feed the resin sheet 16 in a length corresponding to the short sides (top seal portion 20, bottom seal portion 22) of the storage bag 10 by one intermittent drive.

また、シート搬送部６４は、樹脂シート１６の搬送経路上に印刷部７２及び折り畳み機構部７４を備える。印刷部７２は、搬送中の樹脂シート１６に貯留用バッグ１０の印刷を行う。折り畳み機構部７４は、樹脂シート１６を上部から下部に向かって搬送する製袋ラインの上流位置に設けられる。この折り畳み機構部７４は、樹脂シート１６を一方面が対向するように折り畳むことで、１枚の樹脂シート１６を２重にする。 Further, the sheet conveying unit 64 includes a printing unit 72 and a folding mechanism unit 74 on the conveying path of the resin sheet 16. The printing unit 72 prints the storage bag 10 on the resin sheet 16 being conveyed. The folding mechanism unit 74 is provided at an upstream position of the bag making line that conveys the resin sheet 16 from the upper portion to the lower portion. The folding mechanism section 74 folds the resin sheets 16 so that one surfaces thereof face each other, thereby making one resin sheet 16 double.

製造装置６０のヒータ部６６は、部材ヒータ７６（第１ヒータ部）、トップヒータ７８（第２ヒータ部）、ボトムヒータ８０及びサイドヒータ８２を有する。部材ヒータ７６は、２重に折り畳まれた樹脂シート１６とスパウト１４とを熱シールする第１シール工程を実施する。トップヒータ７８は、スパウト１４と樹脂シート１６が熱シールされた部分、及び樹脂シート１６同士をまとめて熱シールする第２シール工程を実施することで、トップシール部２０を形成する。すなわち、貯留用バッグ１０のトップシール部２０は、部材ヒータ７６とトップヒータ７８により、上述した第１溶着部５４ａ、５６ａ及び第２溶着部５４ｂ、５６ｂを有するようになる。 The heater unit 66 of the manufacturing apparatus 60 includes a member heater 76 (first heater unit), a top heater 78 (second heater unit), a bottom heater 80, and a side heater 82. The member heater 76 performs the first sealing step of heat-sealing the double-folded resin sheet 16 and the spout 14. The top heater 78 forms the top seal portion 20 by performing a second sealing step in which the spout 14 and the resin sheet 16 are heat sealed and the resin sheets 16 are heat sealed together. That is, the top seal portion 20 of the storage bag 10 has the above-described first welded portions 54a and 56a and second welded portions 54b and 56b by the member heater 76 and the top heater 78.

詳細には、部材ヒータ７６は、一対の部材ヒータブロック８４、８４（一対の金型）により構成される。一対の部材ヒータブロック８４、８４は、樹脂シート１６の搬送時に互いに離間した位置にあり、樹脂シート１６の搬送停止時に互いに近接して２枚重なる樹脂シート１６を挟み込む。また、部材ヒータ７６は、図示しない供給装置を有し、別途成形された複数のスパウト１４を搬送して、折り畳み機構部７４で２枚の樹脂シート１６の間に所定タイミング毎に１個ずつ供給する。一対の部材ヒータブロック８４、８４は、２枚の樹脂シート１６とその間にスパウト１４を挟んで熱シールを行うことで、樹脂シート１６にスパウト１４を取り付ける。 Specifically, the member heater 76 is composed of a pair of member heater blocks 84, 84 (a pair of molds). The pair of member heater blocks 84, 84 are located apart from each other when the resin sheet 16 is conveyed, and sandwich the two overlapping resin sheets 16 when the resin sheet 16 is stopped being conveyed. Further, the member heater 76 has a supply device (not shown), conveys a plurality of separately formed spouts 14, and supplies one by one at a predetermined timing between the two resin sheets 16 by the folding mechanism section 74. To do. The pair of member heater blocks 84, 84 attaches the spout 14 to the resin sheet 16 by sandwiching the spout 14 between the two resin sheets 16 and performing heat sealing.

図５に示すように、一対の部材ヒータブロック８４、８４は、その上下方向がスパウト１４の長軸方向の長さよりも多少長く形成され、上下方向と直交する幅方向にスパウト１４の舟型本体４０の厚みに応じた幅を有するブロック体に形成されている。そして、一対の部材ヒータブロック８４、８４の各対向面８５は、上端部から下端部に向かって、上側突出面８５ａ、上側非加熱面８５ｂ、部材加熱面８５ｃ、下側非加熱面８５ｄ及び下側突出面８５ｅを有している。 As shown in FIG. 5, the pair of member heater blocks 84, 84 are formed such that the vertical direction thereof is slightly longer than the length of the spout 14 in the long axis direction, and the boat-shaped main body of the spout 14 extends in the width direction orthogonal to the vertical direction. It is formed in a block body having a width corresponding to the thickness of 40. The facing surfaces 85 of the pair of member heater blocks 84, 84 face upward from the upper end portion to the lower end portion. The upper projecting surface 85a, the upper non-heating surface 85b, the member heating surface 85c, the lower non-heating surface 85d, and the lower surface. It has a side projecting surface 85e.

上側突出面８５ａ及び下側突出面８５ｅは、一対の部材ヒータブロック８４、８４の上端部及び下端部に連なる位置に設けられ、上側非加熱面８５ｂ、部材加熱面８５ｃ及び下側非加熱面８５ｄよりも他方の部材ヒータブロック側に突出している。上側突出面８５ａと下側突出面８５ｅは、上下方向（樹脂シート１６の搬送方向）に互いに平行な平坦面に形成されている。この上側突出面８５ａと下側突出面８５ｅは、部材ヒータ７６の閉塞時に、重なり合った樹脂シート１６を挟んで熱シールするシート加熱部となっている。これにより、部材シール時における樹脂シート１６同士の剥がれが防止される。 The upper projecting surface 85a and the lower projecting surface 85e are provided at positions that are continuous with the upper end and the lower end of the pair of member heater blocks 84, 84, and the upper non-heating surface 85b, the member heating surface 85c, and the lower non-heating surface 85d. Than the other member heater block. The upper projecting surface 85a and the lower projecting surface 85e are formed as flat surfaces that are parallel to each other in the vertical direction (the transport direction of the resin sheet 16). The upper projecting surface 85a and the lower projecting surface 85e serve as a sheet heating unit that sandwiches the overlapping resin sheets 16 and performs heat sealing when the member heater 76 is closed. This prevents the resin sheets 16 from being separated from each other when the members are sealed.

上側非加熱面８５ｂ及び下側非加熱面８５ｄは、上側突出面８５ａ及び下側突出面８５ｅに対し段差８５ｆを介して連なり、上下方向に互いに平行な平坦面に形成されている。この上側非加熱面８５ｂ及び下側非加熱面８５ｄは、部材ヒータ７６の閉塞状態で、隣接する上側突出面８５ａ、部材加熱面８５ｃ及び下側突出面８５ｅの形状に基づき、樹脂シート１６や舟型本体４０を挟み込まない（樹脂シート１６に非接触となる）非加熱部となっている。そのため、部材ヒータ７６のシール時でも、上側非加熱面８５ｂ及び下側非加熱面８５ｄと対向する部分は熱シールがなされない。この上側非加熱面８５ｂ及び下側非加熱面８５ｄの上下方向の形成範囲は、例えば、３〜１０ｍｍ程度に設定するとよく、本実施形態では５ｍｍに設定するとよい。 The upper non-heating surface 85b and the lower non-heating surface 85d are continuous with the upper projecting surface 85a and the lower projecting surface 85e via a step 85f, and are formed as flat surfaces parallel to each other in the vertical direction. The upper non-heating surface 85b and the lower non-heating surface 85d are in the closed state of the member heater 76, and based on the shapes of the adjacent upper projecting surface 85a, the member heating surface 85c, and the lower projecting surface 85e, the resin sheet 16 and the boat. It is a non-heating part that does not sandwich the mold body 40 (is not in contact with the resin sheet 16). Therefore, even when the member heater 76 is sealed, heat sealing is not performed on the portions facing the upper non-heating surface 85b and the lower non-heating surface 85d. The vertical forming range of the upper non-heating surface 85b and the lower non-heating surface 85d may be set to about 3 to 10 mm, for example, and may be set to 5 mm in the present embodiment.

一方、部材加熱面８５ｃは、上側非加熱面８５ｂと下側非加熱面８５ｄの間に挟まれた上下方向中間部で、舟型本体４０の長軸方向の側面形状に一致する３角形状（谷状）の窪みに形成されている。すなわち、部材加熱面８５ｃは、舟型本体４０の短軸側の外形に一致するように上下方向に対して所定角度傾斜している。また、部材加熱面８５ｃの上下方向中央部は、舟型本体４０の短軸側の丸角の角度に合った角度で湾曲している。これにより、部材加熱面８５ｃは、スパウト１４及び重なった樹脂シート１６同士を一体的に挟み込んで熱シールする加熱部となっている。さらに、部材加熱面８５ｃと上側非加熱面８５ｂの間、部材加熱面８５ｃと下側非加熱面８５ｄの間は、滑らかな湾曲形状で互いに連なっている。 On the other hand, the member heating surface 85c is an intermediate portion in the vertical direction sandwiched between the upper non-heating surface 85b and the lower non-heating surface 85d, and has a triangular shape (corresponding to the side surface shape in the longitudinal direction of the boat main body 40). It is formed in a valley-shaped depression. That is, the member heating surface 85c is inclined at a predetermined angle with respect to the vertical direction so as to match the outer shape of the boat main body 40 on the minor axis side. Further, the central portion in the vertical direction of the member heating surface 85c is curved at an angle that matches the rounded angle of the boat main body 40 on the minor axis side. As a result, the member heating surface 85c serves as a heating unit that sandwiches the spout 14 and the overlapping resin sheets 16 together to perform heat sealing. Furthermore, between the member heating surface 85c and the upper non-heating surface 85b, and between the member heating surface 85c and the lower non-heating surface 85d, there are continuous smooth curved shapes.

以上の対向面８５を有する部材ヒータ７６は、図６に示すように閉塞状態で、一対の上側突出面８５ａ、８５ａと一対の下側突出面８５ｅ、８５ｅとが、重なり合った樹脂シート１６を外側から挟み込んで熱シールを行う。また、重なり合った樹脂シート１６が舟型本体４０を間に挟んだ状態で、その外側から一対の部材加熱面８５ｃ、８５ｃが狭み込んで押圧することで、樹脂シート１６とスパウト１４の熱シールを行う。この熱シールにより、舟型本体４０の突片４４が溶融することで樹脂シート１６との溶着がなされる。その一方で、一対の上側非加熱面８５ｂ、８５ｂと一対の下側非加熱面８５ｄ、８５ｄが、樹脂シート１６及び舟型本体４０を挟み込まないことで、その対向部分の熱シールを回避する。なお、一対の部材ヒータブロック８４、８４は、上側突出面８５ａ、部材加熱面８５ｃ及び下側突出面８５ｅの近傍位置に、図示しないヒータ線を埋め込んでおくとよい。 As shown in FIG. 6, the member heater 76 having the above facing surface 85 is in a closed state, and the pair of upper projecting surfaces 85a and 85a and the pair of lower projecting surfaces 85e and 85e overlap the resin sheet 16 outside. Heat-seal by sandwiching from. Further, the heat seal between the resin sheet 16 and the spout 14 is achieved by pressing the pair of member heating surfaces 85c and 85c from the outside while the overlapping resin sheet 16 sandwiches the boat-shaped main body 40. I do. Due to this heat sealing, the projecting piece 44 of the boat-shaped main body 40 is melted and welded to the resin sheet 16. On the other hand, the pair of upper non-heating surfaces 85b, 85b and the pair of lower non-heating surfaces 85d, 85d do not sandwich the resin sheet 16 and the boat-shaped main body 40, thereby avoiding heat sealing of the opposing portions. The pair of member heater blocks 84, 84 may have a heater wire (not shown) embedded in the vicinity of the upper protruding surface 85a, the member heating surface 85c, and the lower protruding surface 85e.

また、トップヒータ７８は、一対のトップヒータブロック８８、８８により構成され、部材ヒータ７６よりも搬送方向下流側に間隔をあけて設置される。一対のトップヒータブロック８８、８８は、一対の部材ヒータブロック８４、８４に連動して開閉し、樹脂シート１６の搬送時に相互に離間し、樹脂シート１６の搬送停止に伴い相互に近接して樹脂シート１６及びスパウト１４を挟み込む。 Further, the top heater 78 is composed of a pair of top heater blocks 88, 88, and is installed at a distance downstream of the member heater 76 in the transport direction. The pair of top heater blocks 88, 88 opens and closes in conjunction with the pair of member heater blocks 84, 84, is separated from each other when the resin sheet 16 is conveyed, and comes close to each other when the conveyance of the resin sheet 16 is stopped. The seat 16 and the spout 14 are sandwiched.

一対のトップヒータブロック８８、８８は、一対の部材ヒータブロック８４、８４よりも上下方向に長く形成され、貯留用バッグ１０のトップシール部２０に対応する長さに構成されている。一対のトップヒータブロック８８、８８の幅は、舟型本体４０の厚みにちょうど一致している。また、各トップヒータブロック８８、８８の対向面８５の上下方向中間部には、舟型本体４０の外形に一致する３角形状の溝が設けられている。すなわち、一対のトップヒータブロック８８、８８は、相互の近接状態で、重なり合った樹脂シート１６同士、樹脂シート１６とスパウト１４間をまとめて熱シールする。以上の部材ヒータ７６及びトップヒータ７８により、貯留用バッグ１０は、図２Ｂに示す第１及び第２溶着部５４ａ、５４ｂ、５６ａ、５６ｂを有したトップシール部２０が形成される。 The pair of top heater blocks 88, 88 is formed vertically longer than the pair of member heater blocks 84, 84, and has a length corresponding to the top seal portion 20 of the storage bag 10. The width of the pair of top heater blocks 88, 88 exactly matches the thickness of the boat main body 40. Triangular grooves that match the outer shape of the boat-shaped main body 40 are provided in the vertical middle portions of the facing surfaces 85 of the top heater blocks 88, 88. That is, the pair of top heater blocks 88, 88 are in a state of being close to each other and collectively heat-seal the overlapping resin sheets 16 and between the resin sheet 16 and the spout 14. By the member heater 76 and the top heater 78 described above, the storage bag 10 forms the top seal portion 20 having the first and second welded portions 54a, 54b, 56a, and 56b shown in FIG. 2B.

図４に戻り、ヒータ部６６のボトムヒータ８０は、一対のボトムヒータブロック９０、９０により構成され、トップヒータ７８と同一の高さ位置に設置される。一対のボトムヒータブロック９０、９０も、樹脂シート１６の搬送時に相互に離間し、樹脂シート１６の搬送停止に伴い相互に近接して樹脂シート１６挟み込むことで、ボトムシール部２２（図１参照）を形成する。 Returning to FIG. 4, the bottom heater 80 of the heater unit 66 is composed of a pair of bottom heater blocks 90, 90, and is installed at the same height position as the top heater 78. The pair of bottom heater blocks 90, 90 are also separated from each other when the resin sheet 16 is conveyed, and when the resin sheet 16 stops being conveyed, the bottom heater blocks 90 and 90 are brought close to each other and sandwich the resin sheet 16, so that the bottom seal portion 22 (see FIG. 1). To form.

なお、ヒータ部６６は、トップヒータ７８の下方位置に、スパウト１４との溶着部分を冷却する冷却部９２を備えていてもよい。例えば、冷却部９２は、熱伝達率が高い金属材からなる一対のブロック体により構成される。この冷却部９２により、樹脂シート１６とスパウト１４が早期に冷却され、以降の成形において樹脂シート１６とスパウト１４の溶着状態の崩れをなくすことができる。 The heater section 66 may be provided with a cooling section 92 below the top heater 78 for cooling the welded portion with the spout 14. For example, the cooling unit 92 is composed of a pair of block bodies made of a metal material having a high heat transfer coefficient. The cooling portion 92 cools the resin sheet 16 and the spout 14 at an early stage, and it is possible to prevent the welded state of the resin sheet 16 and the spout 14 from collapsing in the subsequent molding.

サイドヒータ８２は、一対のサイドヒータブロック９４、９４により構成され、製袋ライン（充填部６８よりも下側）の最も下流位置に設置される。つまり、製造装置６０は、サイドシール部２４の形成後に、その上側位置で流動食の充填を行う構成となっている。一対のサイドヒータブロック９４、９４は、１度の熱シールで、サイドヒータ８２の下側に搬送された貯留用バッグ１０の第１サイドシール部２４ａ（図１参照）と、サイドヒータ８２の上側の貯留用バッグ１０の第２サイドシール部２４ｂ（図１参照）とを形成する。サイドヒータ８２の上側の貯留用バッグ１０は、次の樹脂シート１６の間欠移動によりサイドヒータ８２の下側に移動し、次の熱シールにより第１サイドシール部２４ａが形成される。 The side heater 82 is composed of a pair of side heater blocks 94, 94, and is installed at the most downstream position of the bag manufacturing line (below the filling section 68). That is, the manufacturing apparatus 60 is configured to fill the liquid food at the upper position of the side seal portion 24 after the side seal portion 24 is formed. The pair of side heater blocks 94, 94 are heat-sealed once, and the first side seal portion 24a (see FIG. 1) of the storage bag 10 conveyed to the lower side of the side heater 82 and the upper side of the side heater 82. The second side seal portion 24b (see FIG. 1) of the storage bag 10 is formed. The storage bag 10 on the upper side of the side heater 82 moves to the lower side of the side heater 82 by the intermittent movement of the next resin sheet 16, and the first side seal portion 24a is formed by the next heat sealing.

また、一対のサイドヒータブロック９４、９４は、その対向面８５の上下方向中間位置にカッター９５を備える。カッター９５は、サイドシール部２４の形成後に、樹脂シート１６に進出して第１サイドシール部２４ａと第２サイドシール部２４ｂを切断する。第１サイドシール部２４ａが形成された下側の貯留用バッグ１０は、カッター９５により分断されることで、連続する樹脂シート１６から切り離される。 Further, the pair of side heater blocks 94, 94 includes a cutter 95 at an intermediate position in the vertical direction of the facing surface 85. After forming the side seal portion 24, the cutter 95 advances into the resin sheet 16 and cuts the first side seal portion 24a and the second side seal portion 24b. The lower storage bag 10 on which the first side seal portion 24a is formed is separated by the cutter 95 from the continuous resin sheet 16.

一方、製造装置６０の充填部６８は、成形途中のバッグ本体１２に対し貯留物を供給する機能を有する。この充填部６８は、供給管９６及び一対のしごきローラ９８、９８を備える。供給管９６の上流側は、図示しない貯留物の供給タンクに接続される。供給管９６は、折り畳まれる樹脂シート１６の間に上部側から挿入され、下流端がしごきローラ９８に重なる位置まで延びている。 On the other hand, the filling section 68 of the manufacturing apparatus 60 has a function of supplying a stored material to the bag body 12 in the middle of molding. The filling section 68 includes a supply pipe 96 and a pair of ironing rollers 98, 98. The upstream side of the supply pipe 96 is connected to a reservoir supply tank (not shown). The supply pipe 96 is inserted between the folded resin sheets 16 from the upper side, and extends to a position where the downstream end overlaps the ironing roller 98.

一対のしごきローラ９８、９８は、貯留物の充填時に、相互に近接移動して供給管９６の下流端をしごくことで、供給管９６の下流端に流動した貯留物を排出させ、さらに過剰な貯留物の充填を遮断する。そして、充填部６８は、第１サイドシール部２４ａの形成後に、供給管９６を介して貯留物を吐出し、第２サイドシール部２４ｂがシールされる前の貯留空間１２ａに貯留物を充填する。 The pair of squeezing rollers 98, 98 move close to each other to squeeze the downstream end of the supply pipe 96 at the time of filling the stored product, thereby discharging the stored liquid that has flowed to the downstream end of the supply pipe 96, and further excess. Shut off filling of the reservoir. Then, the filling portion 68 discharges the stored material through the supply pipe 96 after the formation of the first side seal portion 24a, and fills the stored space 12a before the second side seal portion 24b is sealed with the stored material. ..

以上のように構成される製造装置６０は、図示しない制御部により、上記のシート供給部６２、シート搬送部６４、ヒータ部６６及び充填部６８を連動して動作させることで、貯留用バッグ１０を製造する。貯留用バッグ１０は、貯留空間１２ａに貯留物が収容された状態で成形されると、製袋ラインから図示しないコンベア等に提供され、次の工程（例えば、検査工程や梱包工程等）に順次搬送される。 In the manufacturing apparatus 60 configured as described above, the control unit (not shown) causes the sheet supply unit 62, the sheet conveyance unit 64, the heater unit 66, and the filling unit 68 to operate in association with each other, thereby storing the storage bag 10 To manufacture. When the storage bag 10 is molded in a state where the storage space 12a stores the storage material, the storage bag 10 is provided to a conveyor or the like (not shown) from the bag manufacturing line, and is sequentially subjected to the next step (for example, an inspection step or a packing step). Be transported.

次に、従来の貯留用バッグ１１０のスパウト１１４の溶着構造と、本実施形態に係る貯留用バッグ１０のスパウト１４の溶着構造との相違について、その作用効果を含めて具体的に説明する。 Next, the difference between the welding structure of the spout 114 of the conventional storage bag 110 and the welding structure of the spout 14 of the storage bag 10 according to the present embodiment will be specifically described, including its function and effect.

図７Ｂに示すように、従来の貯留用バッグ１１０のトップシール部１２０は、スパウト１１４の被溶着部１２８に対して部材ヒータによる部材シール工程と、トップヒータによるトップシール工程とを２度実施する。そして、２度とも被溶着部１２８の外側部全面、及び被溶着部１２８の両端部１４０ａ、１４０ｂに隣接する樹脂シート１６同士を熱シールしている。従って、トップシール部１２０には、被溶着部１２８と樹脂シート１１６とを２度溶着した箇所（吐出部材シール箇所１５４）が形成される。なお、トップシール部１２０の吐出部材シール箇所１５４以外は、トップヒータにより１度だけ溶着がなされたシートシール箇所１５６となる。 As shown in FIG. 7B, the top seal part 120 of the conventional storage bag 110 performs the member seal process by the member heater and the top seal process by the top heater twice on the welded part 128 of the spout 114. .. The resin sheets 16 adjacent to the entire outer surface of the welded portion 128 and both ends 140a and 140b of the welded portion 128 are heat-sealed both times. Therefore, the top seal portion 120 is formed with a portion where the welded portion 128 and the resin sheet 116 are welded twice (ejection member sealing portion 154). It should be noted that, except for the discharge member sealing portion 154 of the top seal portion 120, the sheet sealing portion 156 is welded only once by the top heater.

この場合、貯留用バッグ１１０は、製造時に、部材ヒータの熱シールの熱がぬけないタイミングで、次のトップヒータの熱シールにより熱が加えられることで、舟型本体１４０（被溶着部１２８）の長軸方向の両端部１４０ａ、１４０ｂが多量に溶融する。特に、舟型本体４０の両端部１４０ａ、１４０ｂは、幅狭に形成されていることで、熱が逃げ難く溶融が促進される。 In this case, when the storage bag 110 is manufactured, heat is applied by the heat seal of the next top heater at a timing when the heat seal of the member heater does not escape, so that the boat-shaped main body 140 (welded portion 128). A large amount of both ends 140a and 140b in the long axis direction are melted. In particular, since both ends 140a and 140b of the boat main body 40 are formed to have a narrow width, heat is hard to escape and melting is promoted.

その結果、両端部１４０ａ、１４０ｂの貯留空間１２ａ側の角部は、舟型本体４０の肉（樹脂材料）が貯留空間１２ａに溶け出して硬化することで、舟型本体４０から溶融バリ２００を突出させる。この溶融バリ２００は、その形成と同時に樹脂シート１１６に融着することがある。これにより、貯留用バッグ１１０の使用時等の外力により、溶融バリ２００が被溶着部１２８から破断して分裂した場合に樹脂シート１１６も一緒に破断するおそれがある。また、使用時に内圧が上昇し、舟型本体１４０付近の樹脂シート１１６が広がった際に溶融バリ２００から樹脂シート１１６が剥がれ、その際にピンホールが発生するおそれがある。さらに、硬化した溶融バリ２００が樹脂シート１６を直接破るおそれもある。 As a result, the flesh (resin material) of the boat main body 40 melts into the storage space 12a and hardens at the corners of the both ends 140a, 140b on the side of the storage space 12a. Make it stick out. The molten burr 200 may be fused to the resin sheet 116 at the same time as it is formed. As a result, when the molten burr 200 breaks from the welded portion 128 and splits due to an external force when the storage bag 110 is used, the resin sheet 116 may also break. Further, when the internal pressure rises during use and the resin sheet 116 near the boat-shaped main body 140 spreads, the resin sheet 116 may peel off from the molten burr 200, and pinholes may occur at that time. Further, the cured molten burr 200 may directly break the resin sheet 16.

これに対し、本実施形態に係る貯留用バッグ１０は、図２Ｂ及び図７Ａに示すように、トップシール部２０に第１溶着部５４ａと第２溶着部５４ｂを有する。そして、第１溶着部５４ａ、５６ａが、舟型本体４０の両端部４０ａ、４０ｂ及び両端部４０ａ、４０ｂの周辺部に設けられることで、舟型本体４０の両端部４０ａ、４０ｂに対する熱の影響が大幅に少なくなる。これにより両端部４０ａ、４０ｂの角部の溶融が回避されて、溶融バリ１００の発生が抑制される。例えば、被溶着部２８の両端部４０ａ、４０ｂに形成される溶融バリ１００の体積は、ほぼ確実に４．４ｍｍ3以下となり、後述する実験結果によれば温度条件を変えたとしても、全て２．８ｍｍ3以下であった。 On the other hand, the storage bag 10 according to the present embodiment has the first welding portion 54a and the second welding portion 54b in the top seal portion 20, as shown in FIGS. 2B and 7A. The first welded portions 54a and 56a are provided at both ends 40a and 40b of the boat main body 40 and the peripheral portions of both ends 40a and 40b, so that the heat influences on the both ends 40a and 40b of the boat main body 40. Is significantly reduced. As a result, melting of the corners of both ends 40a, 40b is avoided, and the generation of molten burr 100 is suppressed. For example, the volume of the molten burr 100 formed on both end portions 40a and 40b of the welded portion 28 is almost certainly 4.4 mm 3 or less, and according to the experimental result described later, even if the temperature condition is changed, it is all 2 It was 0.8 mm 3 or less.

このように体積が４．４ｍｍ3以下の溶融バリ１００であれば、樹脂シート１６に融着する機会が低減されて、溶融バリ１００による樹脂シート１６の破断、ピンホールの発生等を抑止することができる。従って、貯留用バッグ１０は、バッグ本体１２の樹脂シート１６とスパウト１４の溶着状態を良好に保つことができる。また、舟型本体４０の両端部４０ａ、４０ｂ及び両端部４０ａ、４０ｂ付近を第１溶着部５４ａ、５６ａに形成する構成は、上述したように部材ヒータ７６の金型（一対の部材ヒータブロック８４、８４）の改良により簡単に実現可能であり、製造コストを大幅に低減すると共に、製造の作業効率を向上させ得る。 In this way, if the volume of the molten burr 100 is 4.4 mm 3 or less, the chance of fusion bonding to the resin sheet 16 is reduced, and the fracture of the resin sheet 16 due to the molten burr 100, the occurrence of pinholes, etc. are suppressed. You can Therefore, in the storage bag 10, the resin sheet 16 of the bag body 12 and the spout 14 can be kept in a good welded state. Further, as described above, the configuration in which both ends 40a, 40b and the vicinity of both ends 40a, 40b of the boat-shaped main body 40 are formed in the first welded portions 54a, 56a is the mold of the member heater 76 (the pair of member heater blocks 84 , 84) can be easily realized, the manufacturing cost can be significantly reduced, and the manufacturing work efficiency can be improved.

以上のように、貯留用バッグ１０は、舟型本体４０（被溶着部２８）の両端部４０ａ、４０ｂに形成された溶融バリ１００の体積が４．４ｍｍ3以下であることで、溶融バリ１００によるバッグ本体１２の損傷を抑制して、使用現場での取扱性を一層向上させることができる。すなわち、貯留用バッグ１０は、溶融バリ１００が発生しても４．４ｍｍ3以下の体積であれば、樹脂シート１６との融着が抑えられて、溶融バリ１００による樹脂シート１６の損傷を大幅に減らすことができる。さらに、貯留用バッグ１０は、溶融バリの体積が２．８ｍｍ3以下であれば、樹脂シート１６に対する溶融バリの影響をより一層低減することができ、樹脂シート１６とスパウト１４の溶着状態を良好に保つことが可能となる。 As described above, in the storage bag 10, since the volume of the molten burr 100 formed on both ends 40a and 40b of the boat-shaped main body 40 (welded portion 28) is 4.4 mm 3 or less, the molten burr 100 It is possible to suppress damage to the bag body 12 due to the above and further improve the handleability at the site of use. That is, if the volume of the storage bag 10 is 4.4 mm 3 or less even if the molten burr 100 is generated, fusion with the resin sheet 16 is suppressed and damage to the resin sheet 16 due to the molten burr 100 is significantly reduced. Can be reduced to Furthermore, in the storage bag 10, if the volume of the molten burr is 2.8 mm 3 or less, the influence of the molten burr on the resin sheet 16 can be further reduced, and the welded state of the resin sheet 16 and the spout 14 is good. It is possible to keep

この場合、貯留用バッグ１０は、少なくとも両端部４０ａ、４０ｂにおいて樹脂シート１６に１度熱シールされた第１溶着部５４ａを有することで、比較的溶融し易い部分の溶融機会が少なくなるため、溶融バリ１００の体積を大幅に減らすことができる。その一方で、貯留用バッグ１０は、長軸方向中央部において樹脂シート１６に２度熱シールされた第２溶着部５４ｂを有するので、被溶着部２８と樹脂シート１６を確実に溶着することができる。 In this case, since the storage bag 10 has the first welded portion 54a that is heat-sealed once to the resin sheet 16 at least at both end portions 40a and 40b, there is less chance of melting in a portion that is relatively easily melted. The volume of the molten burr 100 can be significantly reduced. On the other hand, since the storage bag 10 has the second welded portion 54b that is heat-sealed twice with the resin sheet 16 at the central portion in the longitudinal direction, the welded portion 28 and the resin sheet 16 can be reliably welded. it can.

また、一対の部材ヒータブロック８４、８４が、被溶着部２８の両端部４０ａ、４０ｂから離間した位置の樹脂シート１６を熱シールすることで、第２シール工程後には、バッグ本体１２のトップシール部２０にも２度熱シールした第２溶着部５６ｂが形成される。そのため、貯留用バッグ１０は、スパウト１４の近くで樹脂シート１６を強固に溶着して、スパウト１４の姿勢の崩れ等を抑制して安定的な熱シール状態で形成される。その一方で、両端部４０ａ、４０ｂの近くは、非加熱（第１溶着部５６ａ）となるので、両端部４０ａ、４０ｂの溶融を防ぐことができる。 In addition, the pair of member heater blocks 84, 84 heat seals the resin sheet 16 at positions separated from the both ends 40a, 40b of the welded portion 28, so that the top seal of the bag body 12 is performed after the second sealing step. A second welded portion 56b that is heat-sealed twice is also formed on the portion 20. Therefore, the storage bag 10 is formed in a stable heat-sealed state by firmly welding the resin sheet 16 near the spout 14 and suppressing the posture of the spout 14 from collapsing. On the other hand, the vicinity of the both ends 40a, 40b is not heated (the first welded portion 56a), so that the both ends 40a, 40b can be prevented from melting.

本発明は、上記の実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲において、種々の改変が可能なことは言うまでもない。 Needless to say, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

本実施形態に係る貯留用バッグ１０について、本出願人は、スパウト１４を溶着したトップシール部２０の状態を確認するための実験を行った。その実験結果を図８Ａ〜図１０に示す。 With respect to the storage bag 10 according to the present embodiment, the applicant conducted an experiment for confirming the state of the top seal portion 20 having the spout 14 welded thereto. The experimental results are shown in FIGS. 8A to 10.

〔第１実施例〕
第１実施例では、図７Ｂに示す従来の貯留用バッグ１１０（以下、従来品という）に生じる溶融バリ２００の状態と、図７Ａに示す本実施形態に係る貯留用バッグ１０（以下、改良品という）に生じる溶融バリ１００の状態とを直接比較した。実験では、従来の製造装置により所定数の従来品を製造すると共に、製造装置６０により所定数の改良品を製造した。この際の部材シール及びトップシールにおける熱シールの条件として、各ヒータブロックの温度をＡ℃、Ｂ℃、Ｃ℃、Ｄ℃、Ｅ℃にそれぞれ設定した（Ａは１５０より大きな値であり、Ｂ＝Ａ＋２、Ｃ＝Ａ＋５、Ｄ＝Ａ＋８、Ｅ＝Ａ＋１０である）。また、ヒータブロックによるシール時間（閉塞状態の時間）を１．５秒に統一し、さらにヒータブロックの閉塞状態における圧力も０．４９ＭＰａ以上となるように設定した。 [First Embodiment]
In the first example, the state of the molten burr 200 generated in the conventional storage bag 110 (hereinafter referred to as a conventional product) shown in FIG. 7B and the storage bag 10 according to the present embodiment shown in FIG. 7A (hereinafter referred to as an improved product). It was directly compared with the state of the molten burr 100 that occurs in () In the experiment, a predetermined number of conventional products were manufactured by the conventional manufacturing apparatus, and a predetermined number of improved products were manufactured by the manufacturing apparatus 60. At this time, the temperature of each heater block was set to A° C., B° C., C° C., D° C., and E° C. as conditions for heat sealing in the member seal and the top seal (A is a value larger than 150, B =A+2, C=A+5, D=A+8, E=A+10). Further, the sealing time by the heater block (time in closed state) was unified to 1.5 seconds, and the pressure in the closed state of the heater block was set to 0.49 MPa or more.

そして、製造した試料（現行品、改良品）に生じている溶融バリ１００、２００の各寸法を計測すると共に、その体積を算出した。この寸法として、溶融バリ１００、２００の長さ（舟型本体４０の長軸方向に沿った長さ）、溶融バリ１００、２００の高さ（筒状部３８の軸方向に沿った長さ）、及び溶融バリ１００、２００の幅（舟型本体４０の短軸方向に沿った長さ）をそれぞれ計器により計測した。また体積は、計測した各溶融バリ１００、２００の寸法から、簡易的な計算式（体積＝（長さ×高さ×幅）／２）により算出した。 Then, the dimensions of the molten burrs 100 and 200 generated in the manufactured samples (current products and improved products) were measured, and their volumes were calculated. As the dimensions, the length of the molten burrs 100 and 200 (the length along the long axis direction of the boat main body 40), the height of the molten burrs 100 and 200 (the length along the axial direction of the tubular portion 38). , And the widths of the molten burrs 100 and 200 (the length along the minor axis direction of the boat main body 40) were measured with a measuring instrument. Further, the volume was calculated from the measured dimensions of each of the molten burrs 100 and 200 by a simple calculation formula (volume=(length×height×width)/2).

図８Ａは、上記の実験において、舟型本体４０の両端部４０ａ、４０ｂに生じた溶融バリ１００、２００の各寸法の平均値を棒グラフで示している。図８Ａ中において、斜線のハッチを有する棒グラフが従来品であり、白抜きの棒グラフが改良品である。また、複数の試料における溶融バリ１００、２００の寸法のバラツキについて、細いバーで示している。つまり、バーが長ければバラツキが大きく、バーが短ければバラツキが小さいことになる。 FIG. 8A is a bar graph showing the average values of the dimensions of the molten burrs 100 and 200 generated at both ends 40a and 40b of the boat main body 40 in the above experiment. In FIG. 8A, the bar graph having hatched lines is the conventional product, and the white bar graph is the improved product. Further, the variation in the dimensions of the molten burrs 100 and 200 in a plurality of samples is indicated by a thin bar. That is, if the bar is long, the variation is large, and if the bar is short, the variation is small.

図８Ａを参照すると、改良品の溶融バリ１００のほうが、従来品の溶融バリ２００よりもその寸法が全体的に短いことがわかる。従って、改良品のほうが、溶融バリ１００の発生量が少ないとみなすことができる。また、従来品の溶融バリ２００は、寸法のバラツキが大きいのに対し、改良品の溶融バリ１００は、従来品よりも寸法のバラツキが小さい。よって、改良品は、溶融バリ１００が小さく且つバラツキがあまりない製品状態で安定に製造されていることが確認できた。 With reference to FIG. 8A, it can be seen that the improved molten burr 100 is generally shorter in size than the conventional molten burr 200. Therefore, it can be considered that the improved product produces less molten burr 100. Further, the molten burr 200 of the conventional product has large dimensional variation, whereas the molten burr 100 of the improved product has smaller dimensional variation than the conventional product. Therefore, it was confirmed that the improved product was stably manufactured in a product state in which the molten burr 100 was small and showed little variation.

また、図８Ｂは、従来品の体積及び改良品の体積を算出したものを点グラフで示している。この図８Ｂを参照すると、改良品の溶融バリ１００の体積のほうが、従来品の溶融バリ２００の体積よりも小さく、さらに体積のバラツキも小さいことが分かる。例えば、従来品は、溶融バリ２００の体積が４．５ｍｍ3以上となるものが幾つか発生し、３．０ｍｍ3以下の溶融バリを有するものは存在しなかった。その一方で、改良品は、溶融バリ１００の体積が概ね２．８ｍｍ3以下でまとまっている。従って、改良品は、従来品に対し溶融バリ１００が充分に小さい状態で製造されていることが確認できた。 Further, FIG. 8B shows, as a dot graph, the calculated volumes of the conventional product and the improved product. With reference to FIG. 8B, it can be seen that the volume of the molten burr 100 of the improved product is smaller than that of the molten burr 200 of the conventional product, and the variation in the volume is also small. For example, in the conventional products, some of the molten burrs 200 having a volume of 4.5 mm 3 or more were generated, and none of them had a molten burr of 3.0 mm 3 or less. On the other hand, in the improved product, the volume of the molten burr 100 is approximately 2.8 mm 3 or less and is collected. Therefore, it was confirmed that the improved product was manufactured with the molten burr 100 being sufficiently smaller than the conventional product.

〔第２実施例〕
第２実施例では、実施例１で製造した従来品及び改良品に関し、屈曲等の外力を加える屈曲操作を実際に行い、スパウト１４の周辺部においてバッグ本体１２に破断が生じるか否かを確認する実験を行った。具体的に、屈曲操作では、スパウト１４の溶融バリ１００、２００の発生部付近を保持して、スパウト１４に対してバッグ本体１２をシール方向と直交する方向に９０°に動かし、この動作を５回繰り返して貯留用バッグ１０、１１０の状態を確認した。図９は、温度条件を変化させて製造した所定数（５個）の試料（従来品、改良品）に対し破断が生じた個数を表した表である。 [Second Embodiment]
In the second embodiment, regarding the conventional product and the improved product manufactured in the first embodiment, a bending operation for applying an external force such as bending is actually performed, and it is confirmed whether or not the bag body 12 is broken at the peripheral portion of the spout 14. The experiment was done. Specifically, in the bending operation, the vicinity of the melt burr 100, 200 generation portion of the spout 14 is held, and the bag body 12 is moved with respect to the spout 14 by 90° in a direction orthogonal to the sealing direction. The state of the storage bags 10 and 110 was confirmed by repeating the process. FIG. 9 is a table showing the number of fractures in a predetermined number (5) of samples (conventional product and improved product) manufactured under different temperature conditions.

図９を参照すると、従来品では、幾つかの貯留用バッグ１１０に破断が生じているのに対し、改良品では、温度条件を変えても、いずれの貯留用バッグ１０にも破断が生じていないことが分かる。従って、改良品は、従来品と比較して、屈曲操作時の破れがなく、良好に使用することができると言い得る。また、図８Ｂに示す溶融バリ２００の体積が４．８ｍｍ3以上の場合には、屈曲操作時にバッグ本体１２に破断が生じることが多かった。逆に、図８Ｂに示す溶融バリが４．４ｍｍ3以下では、屈曲操作時にバッグ本体１２に破断が生じることは殆どなかった。よって、溶融バリ１００、２００の体積の許容限界は、４．４ｍｍ3以下であることが求められ、より好ましくは２．８ｍｍ3以下であるとよい。改良品は、溶融バリ１００の体積が２．８ｍｍ3以下であったために、バッグ本体１２の破断が一つも生じないことを確認できた。 Referring to FIG. 9, in the conventional product, some storage bags 110 are broken, whereas in the improved product, any storage bag 10 is broken even if the temperature condition is changed. I know there isn't. Therefore, it can be said that the improved product has no breakage during bending operation and can be favorably used as compared with the conventional product. When the volume of the molten burr 200 shown in FIG. 8B is 4.8 mm 3 or more, the bag body 12 often breaks during the bending operation. On the contrary, when the molten burr shown in FIG. 8B was 4.4 mm 3 or less, the bag body 12 was hardly broken during the bending operation. Therefore, the allowable limit of the volume of molten burrs 100 and 200, it is required is 4.4 mm 3 or less, more preferably is 2.8 mm 3 or less. In the improved product, since the volume of the molten burr 100 was 2.8 mm 3 or less, it was confirmed that the bag body 12 did not break at all.

〔第３実施例〕
第３実施例では、実施例１で製造した従来品及び改良品に関し、バッグ本体１２に圧力を加えて、バッグ本体１２とスパウト１４との間が破れる圧力を測定する破袋圧力を測定する実験を行った。図１０は、温度条件を変化させて製造した試料（従来品、改良品）の破袋圧力の平均値を示す棒グラフである。なお、図１０中において、複数の試料における破袋圧力のバラツキについては細いバーで示している。 [Third Embodiment]
In the third embodiment, an experiment for measuring the bag-breaking pressure for measuring the pressure at which the bag body 12 and the spout 14 are broken by applying pressure to the bag body 12 with respect to the conventional product and the improved product manufactured in the first embodiment. I went. FIG. 10 is a bar graph showing the average value of the bag breaking pressure of the samples (conventional product and improved product) manufactured under different temperature conditions. In FIG. 10, variations in bag breaking pressure among a plurality of samples are indicated by thin bars.

図１０を参照すると、改良品の破袋圧力の平均値は、従来品の破袋圧力の平均値よりも若干大きかった（ただし、温度がＤ℃場合は、従来品のほうが大きかった）。実際の貯留用バッグ１０の使用においては、この破袋圧力について有意差はないものと考えられ、つまり改良品におけるバッグ本体１２とスパウト１４との溶着状態（溶着力）は、従来品と同程度となると言い得る。 Referring to FIG. 10, the average value of the bag breaking pressure of the improved product was slightly larger than the average value of the bag breaking pressure of the conventional product (however, the conventional product was larger when the temperature was D° C.). In actual use of the storage bag 10, it is considered that there is no significant difference in the bag breaking pressure, that is, the welding state (welding force) between the bag body 12 and the spout 14 in the improved product is similar to that in the conventional product. It can be said that

また、図１０を参照すると、改良品の破袋圧力は、従来品の破袋圧力よりもバラツキが少ないことが分かる。従って、製造装置６０は、従来品に比べて、破袋圧力が充分に高いものを安定的に製造可能であることが確認できた。 Further, referring to FIG. 10, it is found that the bag breaking pressure of the improved product has less variation than the bag breaking pressure of the conventional product. Therefore, it can be confirmed that the manufacturing apparatus 60 can stably manufacture the one having a sufficiently high bag breaking pressure as compared with the conventional product.

また、従来品及び改良品に対して、他の実験を幾つか行ったとこところ、いずれも従来品と改良品で有為な差がなかった。他の実験としては、エージレスチェッカーを注入して３時間放置した際の液漏れがあるか否かを確認する気密性の実験、所定圧力で２時間加圧して液漏れがあるか否か確認する耐圧性の実験、及び熱シール部のシール強度の測定バッグがあげられる。 Also, some other experiments were conducted on the conventional product and the improved product, and there was no significant difference between the conventional product and the improved product. Other experiments include an air-tightness test to check if there is a liquid leak when an ageless checker is injected and left for 3 hours, and to check if there is a liquid leak by pressurizing at a predetermined pressure for 2 hours. An example is a pressure resistance experiment and a bag for measuring the seal strength of the heat seal part.

１０…貯留用バッグ １２…バッグ本体
１４…スパウト １６…樹脂シート
１８…熱シール部 ２０…トップシール部
２８…被溶着部 ４０…舟型本体
４４…突片 ４６…隙間
５４…吐出部材シール部 ５４ａ、５６ａ…第１溶着部
５４ｂ、５６ｂ…第２溶着部 ５６…シートシール部
６０…製造装置 ６６…ヒータ部
７６…部材ヒータ ７８…トップヒータ
８４…部材ヒータブロック ８５…対向面
８５ａ…上側突出面 ８５ｂ…上側非加熱面
８５ｃ…部材加熱面 ８５ｄ…下側非加熱面
８５ｅ…下側突出面 １００…溶融バリ

DESCRIPTION OF SYMBOLS 10... Storage bag 12... Bag main body 14... Spout 16... Resin sheet 18... Heat seal part 20... Top seal part 28... Welding part 40... Boat type main body 44... Projection piece 46... Gap 54... Discharge member seal part 54a , 56a... First welded parts 54b, 56b... Second welded part 56... Sheet seal part 60... Manufacturing device 66... Heater part 76... Member heater 78... Top heater 84... Member heater block 85... Opposed surface 85a. 85b... Upper non-heating surface 85c... Member heating surface 85d... Lower non-heating surface 85e... Lower protruding surface 100... Melt burr

Claims (2)

重なり合った樹脂シートの熱シール部の内側に貯留物を貯留する貯留空間を有するバッグ本体と、
前記熱シール部に固定される被溶着部を有し、前記貯留空間から前記バッグ本体の外部に前記貯留物を吐出可能な吐出部材と、を備える貯留用バッグの製造方法であって、
前記被溶着部は、前記熱シール部の延在方向に沿って長軸を有し、且つ前記延在方向と直交する方向に短軸を有する略舟型状を呈しており、
前記製造方法は、
重なった前記樹脂シートの間に前記吐出部材を供給し、第１ヒータ部により前記被溶着部と前記樹脂シートとを前記樹脂シートの外側から熱シールする第１シール工程と、
前記第１シール工程後に、第２ヒータ部により前記被溶着部が溶着された前記樹脂シートと、前記樹脂シート同士が重なる箇所とをまとめて熱シールして前記バッグ本体の１辺の前記熱シール部を形成する第２シール工程と、を含み、
前記第１シール工程では、前記吐出部材の長軸方向の端部及び該端部付近と前記樹脂シートとを熱シールせずに、前記吐出部材の長軸方向の中央部分と前記樹脂シートとを熱シールし、
且つ前記被溶着部と前記樹脂シートの溶着と同時に、前記被溶着部の前記各端部から離間した位置の前記樹脂シート同士を熱シールする
ことを特徴とする貯留用バッグの製造方法。 A bag main body having a storage space for storing the stored material inside the heat-sealing portion of the overlapping resin sheets;
A method for manufacturing a storage bag, comprising a welded part fixed to the heat seal part, and a discharge member capable of discharging the stored material from the storage space to the outside of the bag body,
The welded portion has a long axis along the extending direction of the heat seal portion, and has a substantially boat shape having a short axis in a direction orthogonal to the extending direction,
The manufacturing method,
A first sealing step of supplying the discharge member between the overlapping resin sheets, and heat-sealing the welded portion and the resin sheet from the outside of the resin sheet by a first heater portion;
After the first sealing step, the resin sheet on which the welded portion is welded by the second heater portion and the portion where the resin sheets overlap each other are collectively heat-sealed to heat-seal the one side of the bag body. A second sealing step for forming a portion,
In the first sealing step, the longitudinal center portion of the ejection member and the resin sheet are not heat-sealed with the longitudinal end portion of the ejection member and the vicinity of the end portion and the resin sheet. Heat seal ,
A method for manufacturing a storage bag, characterized in that, at the same time as the welding of the welded portion and the resin sheet, the resin sheets at positions separated from the respective ends of the welded portion are heat-sealed . 重なり合った樹脂シートの熱シール部の内側に貯留物を貯留する貯留空間を有するバッグ本体と、
前記熱シール部に固定される被溶着部を有し、前記貯留空間から前記バッグ本体の外部に前記貯留物を吐出可能な吐出部材と、を備える貯留用バッグの製造装置であって、
前記被溶着部は、前記熱シール部の延在方向に沿って長軸を有し、且つ前記延在方向と直交する方向に短軸を有する略舟型状を呈しており、
前記製造装置は、
重なった前記樹脂シートの間に前記吐出部材を供給し、前記被溶着部と前記樹脂シートとを前記樹脂シートの外側から熱シールする一対の金型を有する第１ヒータ部と、
前記第１ヒータ部による熱シール後に、前記被溶着部が溶着された前記樹脂シートと、前記樹脂シート同士が重なる箇所とをまとめて熱シールして前記バッグ本体の１辺の前記熱シール部を形成する第２ヒータ部と、を含み、
前記一対の金型は、前記吐出部材の長軸方向の中央部分と前記樹脂シートとを熱シールする加熱部と、前記吐出部材の長軸方向の端部及び該端部付近と前記樹脂シートとを熱シールしない非加熱部と、を含み、
前記一対の金型は、前記非加熱部よりも対向する金型に向かって突出するシート加熱部を有し、
前記シート加熱部は、前記樹脂シートの溶着と同時に、前記被溶着部の前記各端部から離間した位置の前記樹脂シート同士を熱シールする
ことを特徴とする貯留用バッグの製造装置。
A bag main body having a storage space for storing the stored material inside the heat-sealing portion of the overlapping resin sheets;
A storage bag manufacturing apparatus having a welded part fixed to the heat seal part, comprising: a discharge member capable of discharging the stored material from the storage space to the outside of the bag body,
The welded portion has a long axis along the extending direction of the heat seal portion, and has a substantially boat shape having a short axis in a direction orthogonal to the extending direction,
The manufacturing apparatus is
A first heater unit having a pair of molds for supplying the discharge member between the overlapping resin sheets and thermally sealing the welded portion and the resin sheet from the outside of the resin sheet,
After heat sealing by the first heater portion, the resin sheet to which the welded portion is welded and a portion where the resin sheets overlap each other are collectively heat-sealed to form the heat-sealing portion on one side of the bag body. A second heater portion to be formed,
The pair of molds includes a heating portion that heat-seals the central portion of the discharge member in the long axis direction and the resin sheet, an end portion of the discharge member in the long axis direction and the vicinity of the end portion, and the resin sheet. only contains a non-heating unit which is not heat-sealed, the,
The pair of molds has a sheet heating unit that projects toward the mold facing the non-heating unit,
The sheet heating unit heat-seals the resin sheets at positions separated from the respective ends of the welded portion at the same time as the resin sheet is welded, and the storage bag manufacturing apparatus is characterized in that.
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