JP7436836B2 - 包装体製造装置 - Google Patents

包装体製造装置 Download PDF

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JP7436836B2
JP7436836B2 JP2020074969A JP2020074969A JP7436836B2 JP 7436836 B2 JP7436836 B2 JP 7436836B2 JP 2020074969 A JP2020074969 A JP 2020074969A JP 2020074969 A JP2020074969 A JP 2020074969A JP 7436836 B2 JP7436836 B2 JP 7436836B2
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guide member
packaging material
detection piece
welded portion
detection
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JP2021172345A (ja
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智博 竹本
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シブヤパッケージングシステム株式会社
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Priority to JP2020074969A priority Critical patent/JP7436836B2/ja
Priority to CN202110401062.3A priority patent/CN113525790B/zh
Priority to EP21169111.8A priority patent/EP3900917A1/en
Priority to US17/233,550 priority patent/US11572212B2/en
Priority to KR1020210051312A priority patent/KR20210129612A/ko
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    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/08—Forming three-dimensional containers from sheet material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/02—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
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    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • 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
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Description

本発明は、連続供給される帯状シートを円筒状に形成し、重なり合う部分をシールして包装体を製造する包装製造装置に関する。
連続供給される帯状フィルムを筒状に成形し、重畳部を溶着して溶着線を形成し、溶着直後に筒状フィルム内に配置した筒状フィルムの径の大きい径を有する拡張リングによりフィルムに断面張力を与えて重畳部の溶着状態を調整する構成が知られている（特許文献１参照）。
特公平８－２５５４３号公報
しかし、特許文献１の構成では、径の大きい拡張リングが筒状フィルムの内周面に摺接するため包装材に大きな負荷が掛かり、より大きな力がフィルムを送り出すのに必要となる。また、これによりフィルムにもより大きな負担が掛かる。
本発明は、連続走行され筒状に成形されるシート状の包装材の溶着部のシール不良を、包装材に大きな負荷を掛けることなく検出することを課題としている。
本発明の第１の発明である包装体製造装置は、筒状に形成されたシート状の包装材の重なり部をシール手段により溶着して包装体を製造する包装体製造装置において、筒状に形成される包装材を案内するガイド部材と、前記シール手段の下流において、溶着された包装材の溶着部に沿って前記ガイド部材に揺動可能に取り付けられる検出片と、前記検出片を前記ガイド部材の外方へ付勢する付勢手段と、前記検出片が前記付勢手段の付勢力により溶着部よりも外側に押し出されたことを検出する検出手段とを備えることを特徴としている。
本発明の第２の発明である包装体製造装置は、第１の発明において、前記検出片が溶着部よりも外側に押し出されると溶着部にシール不良が発生したと判断する判定手段を備えることを特徴としている。
本発明の第３の発明である包装体製造装置は、第１の発明または第２の発明において、前記検出手段が、前記検出片の先端が接近したことを検出する近接センサであることを特徴としている。
本発明の第４の発明である包装体製造装置は、第３の発明において、前記検出片の先端を溶着部に向けて凸状に形成したことを特徴としている。
本発明によれば、連続走行され筒状に成形されるシート状の包装材の溶着部のシール不良を、包装材に大きな負荷を掛けることなく検出することができる。
本発明の一実施形態である包装体製造装置の斜視図である。 図１の包装材が円筒形に巻かれたガイド部周辺の正面図および側面図である。 検出ドグの２つの状態を示す拡大側面図である。 検出ドグが押し出された状態のガイド部材周辺の側面図である。 変形例の検出ドグを用いたガイド部周辺の側面図である。
以下、本発明の実施の形態を、図面を参照して説明する。図１は、本発明の一実施形態である包装体製造装置の斜視図である。図２（ａ）は、包装座が円筒形に巻かれたガイド部周辺の正面図であり、図２（ｂ）はその側面図である。
本実施形態の包装体製造装置１０は、連続供給されるシート状の不織布である包装材Ｓを円筒形のガイド部材１２の周りに巻き付け、縦方向の重なり部分を溶断（縦シール）して円筒状の包装体を成形し、その後包装体の横方向を溶断、内容物の充填、横方向の溶断を行って四面体形状の抽出バッグを製造する装置であり、このような装置は例えば特許第５２４０４８２号などにより従来公知である（なお、ここで溶断とは、溶着すると同時に切断することである）。本実施形態において、ガイド部材１２は包装体に充填される内容物を包装体内に供給するための充填ノズルの機能も果たす。例えば、直立して配置されるガイド部材１２の上端には内容物をガイド部材１２内に供給するホッパ１４が配置される。
ガイド部材１２の上方部には、側方から帯状のシートとして供給される包装材Ｓを折り曲げ、ガイド部材１２の周囲に沿って巻き付ける周知のフォーマーガイド１６が、ガイド部材１２の周囲を取り囲むように配置される。側方から供給される包装材Ｓは、フォーマーガイド１６により下方に向けて折り曲げられるとともに、円筒状のガイド部材１２の周りを取り囲むように巻き付けられ、円筒状に成形される。このとき帯状の包装材Ｓの両側辺は、内側面同士を密接させるように、ガイド部材１２の長手方向に沿って重ね代分、所定幅で重ね合わされる（重なり部）。そして、包装材Ｓは同状態を維持したまま、ガイド部材１２に沿って下方へ送り出される。
フォーマーガイド１６の下方（下流）にあって、包装材Ｓの重なり部に対応する位置には、ガイド部材１２に隣接してシール装置（シール手段）１８が配置される。シール装置１８は、例えば重なり部を溶断するための装置であり、超音波ホーン１８Ａと、これに対向するアンビル１８Ｂを備える。超音波ホーン１８Ａとアンビル１８Ｂは、ガイド部材１２に沿って走行する包装材Ｓの重なり部を両側から挟むように配置される。包装材Ｓの重なり部は、超音波ホーン１８Ａとアンビル１８Ｂの間を通ることで溶断される（溶着部Ｍ）。
また、本実施形態のガイド部材１２には、シール装置１８よりも下方（下流）であって、包装材Ｓの溶着部Ｍに対応する位置に、検出ドグ（検出片）２０が設けられる。図３（ａ）、図３（ｂ）は、検出ドグ２０の２つの状態を示す拡大側面図である。
検出ドグ２０は、溶着部Ｍに沿うように、ガイド部材１２の長手方向に沿って配置される。検出ドグ２０の上端部（上流端）は水平軸を中心に揺動可能にガイド部材１２の側面に取り付けられ、下端部（下流端）を外側に押し出すように不図示の付勢部材により付勢される。図３（ａ）には、検出ドグ２０が付勢力により外側に押し出された状態が示され、図３（ｂ）には、検出ドグ２０を付勢力に抗してガイド部材１２に押し当てた状態が示される。なお、検出ドグ２０の上端部には溶着部Ｍに向かって揺動した際（図３（ａ）の状態）にガイド部材１２と当接して揺動する角度を規制する当接部２０Ａが形成される。
図４はガイド部材周辺の側面図であり、円筒状に成形された包装材Ｓの溶着部Ｍから検出ドグが突出された状態が示される。検出ドグ２０の下端部と略同じ高さには、ガイド部材１２から所定距離離れた位置に検出ドグ２０と対向するように近接センサ２２が配置される。近接センサ２２は、検出ドグ２０の下端部が接近したことを検知することで、検出ドグ２０が外側に押し出されたことを検知する（検出手段）。近接センサ２２からの信号は、図示しない制御部に送られる。
また、検出ドグ２０の下端部と略同じ高さには、筒状に形成された包装材Ｓをガイド部材１２に沿って下方へ送り出す一対の送りローラ２４が配置される。一対の送りローラ２４は、例えば図２（ａ）の正面図において、ガイド部材１２を左右から挟むように配置され、水平軸周りに互いに反対向きに同じ速度で回転される。ガイド部材１２を取り囲む円筒状の包装材Ｓは、ガイド部材１２の両側において、ガイド部材１２と送りローラ２４の間に挟まれ、送りローラ２４と同期して下方へと送り出される。
なお、ガイド部材１２の下端部よりも下流側には、円筒状に成形された包装材Ｓを長手方向軸を横切るように挟み込み溶断（横シール）する横シール装置が設けられ、横シールを行った後、ガイド部材１２内を通して内容物を供給し、このシール部の上に溜まった内容物の上方をさらに横シールを行うことで内容物を、四面体形状の抽出バッグに密封した包装体を製造する。なお、本実施形態において内容物は、例えば緑茶や紅茶などである。
シール装置１８により、重なり部（重ね代）が適正に溶着されている場合、検出ドグ２０は、付勢力に抗して円筒状の包装材Ｓ内に抑え込まれ、ガイド部材１２の長手方向に略沿って配置されるが、適正に溶着されていない場合には、検出ドグ２０の下端部が回転付勢力により包装材Ｓの両側縁部（重なり部）の間を外側に向けて押し出される。これにより、検出ドグ２０の下端部が近接センサ２２により検知され、制御部は溶着部Ｍにシール不良が発生したと判断する（判定手段）。
以上のように、本実施形態によれば、連続走行され筒状に成形されるシート状の包装材の溶着部のシール不良を、包装材に大きな負荷を掛けることなく検出することができる。
次に図５の側面図を参照して、本実施形態の変形例について説明する。変形例では、検出ドグの形状が実施形態と異なり、その他の構成は実施形態と同様であるため、同一の参照符号を用い、その説明を省略する。
図５に示されるように、変形例の検出ドグ２６は、下端部に溶着部Ｍに向けて凸状に突出する突起部２６Ａを備える。突起部２６Ａの先端は、円筒状の包装材Ｓの内周面との摩擦が小さくなるように、例えば円弧状に形成される。突起部２６Ａは、溶着部Ｍに小さな穴しか開いていない場合でも、包装材Ｓから突出して近接センサ２２により検出することができるので、より高精度にシール不良を検出することが可能となる。
なお、本実施形態では、不織布を包装材として、茶葉や紅茶などの内容物を収容した四面体形状の抽出バッグを製造する装置で説明したが、これに限るものではなく、樹脂製のシートを用いて液体を収容した三方シールや四方シールの袋状に密封した包装体を製造する装置などでも良い。
１０ 包装体製造装置
１２ ガイド部材（充填ノズル）
１４ ホッパ
１６ フォーマーガイド
１８ シール装置（シール手段）
２０ 検出ドグ（検出片）
２２ 近接センサ
Ｍ 溶着部
Ｓ シート（包装材）

Claims (4)

  1. 筒状に形成されたシート状の包装材の重なり部をシール手段により溶着して包装体を製造する包装体製造装置において、
    筒状に形成される包装材を案内するガイド部材と、
    前記シール手段の下流において、溶着された包装材の溶着部に沿って前記ガイド部材に揺動可能に取り付けられる検出片と、
    前記検出片を前記ガイド部材の外方へ付勢する付勢手段と、
    前記検出片が前記付勢手段の付勢力により溶着部よりも外側に押し出されたことを検出する検出手段と
    を備えることを特徴とする包装体製造装置。
  2. 前記検出片が溶着部よりも外側に押し出されると溶着部にシール不良が発生したと判断する判定手段を備えることを特徴とする請求項１に記載の包装体製造装置。
  3. 前記検出手段が、前記検出片の先端が接近したことを検出する近接センサであることを特徴とする請求項１または請求項２に記載の包装体製造装置。
  4. 前記検出片の先端を溶着部に向けて凸状に形成したことを特徴とする請求項３に記載の包装体製造装置。
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