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JP3904675B2 - Ultrasonic sealing device that seals tubular container material in the transverse direction - Google Patents

Ultrasonic sealing device that seals tubular container material in the transverse direction Download PDF

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Publication number
JP3904675B2
JP3904675B2 JP18872097A JP18872097A JP3904675B2 JP 3904675 B2 JP3904675 B2 JP 3904675B2 JP 18872097 A JP18872097 A JP 18872097A JP 18872097 A JP18872097 A JP 18872097A JP 3904675 B2 JP3904675 B2 JP 3904675B2
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Japan
Prior art keywords
container material
tubular container
anvil
gap
sealing device
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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JP18872097A
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Japanese (ja)
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JPH1143115A (en
Inventor
ベングトソン ベニー
ファエラ フランセスコ
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テトラ ラバル ホールデイングス エ フイナンス ソシエテ アノニム
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Priority to JP18872097A priority Critical patent/JP3904675B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/346—Making joints having variable thicknesses in the joint area, e.g. by using jaws having an adapted configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/326—Shaping the burr, e.g. by the joining tool
    • 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
    • B29C66/80—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
    • B29C66/81461—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 being multi-lamellar or segmented, i.e. comprising a plurality of strips, plates or stacked elements
    • 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
    • B29C66/81469—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 next to the other in a single line transverse to the feed direction, e.g. shoulder to shoulder sonotrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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

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  • Mechanical Engineering (AREA)
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Description

【０００１】
【発明の属する技術分野】
本発明は、チューブ状容器材料を横断方向にシールする超音波シール装置に係り、例えば、長手方向にシールされて作られたチューブ状容器材料に液体状食品等を収容し、それを長手方向に規則的な間隔で横断方向にシールして枕状パッケージにし、次にこれを直方体形状に成形するための、超音波シール装置に関するものである。
【０００２】
【従来の技術】
図１０を参照すると、チューブ状容器材料を横断方向にシールするための超音波シール装置の側面図が示されている。超音波シール装置は、アンビル１９と、超音波変換器１８とを有している。チューブ状容器材料１７は、前壁１２と、後壁半部分１３と、後壁半部分１４とが重なって長手方向にシールされた部分５を有している。アンビル１９はチューブ状容器材料１７の後壁１３，１４に接触して配置され、チューブ状容器材料１７の横断方向に延びて配置される。
【０００３】
超音波変換器１８は、一対の変換器ヘッド１８ａ，１８ｂを有し、この一対の変換器ヘッド１８ａ，１８ｂ間には間隙１６が画成されており、チューブ状容器材料１７の前壁１２は超音波変換器１８に接触して配置され、アンビル１９と超音波変換器１８との間にチューブ状容器材料１７が挟まれて押圧される。チューブ状容器材料１７の長手方向にシールされた部分５は一対の変換器ヘッド１８ａ，１８ｂ間の間隙１６に対応して位置される。かくして、符号１０で示した場所においては、チューブ状容器材料１７の長手方向にシールされた部分５と、横断方向にシールされた部分（図５の符号７を参照）とが交差することとなる。
【０００４】
一対の変換ヘッド１８ａ，１８ｂは超音波エネルギを発生し、アンビル１９との間に挟まれたチューブ状容器材料１７を横断方向にシールする。チューブ状容器材料１７の、長手方向にシールされた部分５の厚さは他の部分より厚いので、この部分５を収容するための凹所１１（図１２の（ａ）参照）をアンビル１９に備えることが行われていた。図１２の（ａ）に示すように、この凹所１１の断面はほぼ台形状であった。
【０００５】
しかしながら、図１２の（ａ）で示されているように、チューブ状容器材料１７の、長手方向にシールされた部分５が凹所１１内にぴったりと整合すれば問題はないが、図１２の（ｂ）で示すごとく、チューブ状容器材料１７がねじれて配置されると、長手方向にシールされた部分５が凹所１１に整合していないで、後壁半部分１３の端部１３ａが凹所１１からはみ出して位置され、この端部１３ａがはさまれて、長手方向にシールされた部分５のところが十分に押圧されず、横断方向のシールが符号１４ａで示した場所において不良となり、ここから内容物の漏れが生ずることになってしまう。
【０００６】
この問題を阻止しようとして、凹所１１の幅を大きなものとすると、これまたシール圧力の低下をもたらして、横断方向シールの不良を生じさせる。
【０００７】
従来の技術においては、かような問題を根本的に改善するために、図１１に示した如き構造のアンビル１９ａが提供されていた。ここでは、アンビル１９ａの凹所１１ａ中に複数の移動可能部材１５を備えて、配置されたチューブ状容器材料１７の長手方向にシールされた部分５の位置に対応して、個々の移動可能部材１５を移動調整して、長手方向にシールされた部分５がぴったりと整合するような凹みを形成するようにしている。
【０００８】
【発明が解決しようとする課題】
図１１に示した従来の改善されたアンビル１９ａは、複数の移動可能部材１５を凹所１１ａ内に備えるという極めて複雑な構造を採用している。本発明は、かように複雑な構造を具備することなく、極めて簡単な構成で、従来技術における前述した問題を巧妙に解決することができ、横断方向のシールの不良個所を生じないようになし得る、チューブ状容器材料を横断方向にシールする超音波シール装置を提供することを目的とするものである。
【０００９】
【課題を解決するための手段】
後に説明する発明の実施の形態において用いている符号を参考のために付記して記述すると、本発明は、前壁１２と、長手方向にシールされた部分５を有する後壁１３，１４とで構成された細長いチューブ状容器材料１７を横断方向にシールする超音波シール装置であって、
前記チューブ状容器材料１７の前記後壁１３，１４に接触して配置され、前記チューブ状容器材料１７の横断方向に延びるアンビル１と、
前記チューブ状容器材料１７の前記前壁１２に接触して配置され、前記チューブ状容器材料１７を前記アンビル１との間に挟んで押圧するとともに、前記チューブ状容器材料１７を横断方向にシールする超音波変換器１８とを含み、
前記超音波変換器１８は、一対の変換器ヘッド１８ａ，１８ｂを有し、この一対の変換器ヘッド１８ａ，１８ｂ間には間隙１６が画成されており、前記チューブ状容器材料１７の前記長手方向にシールされた部分５に対応して前記一対の変換器ヘッド１８ａ，１８ｂの前記間隙１６が位置するようにされており、
前記チューブ状容器材料１７の前記長手方向にシールされた部分５を収容するために、前記アンビル１は前記間隙１６に対応する位置に凹み部分２を有し、この凹み部分２の前記長手方向に垂直な断面は、アーチ形状であることを特徴とする。
【００１０】
【発明の実施の形態】
図１を参照すると、本発明において採用されるアンビル１の斜視図が示されている。図２は、図１の符号Ｍの部分を拡大して示したものであり、図３は、図２の側面図であり、図４は図３の符号Ｎの部分を拡大して示したものである。
このアンビル１は、図１０において前述したアンビル１９に代えて用いられる。かくて、アンビル１はチューブ状容器材料１７の後壁１３，１４に接触して配置され、チューブ状容器材料１７の横断方向に延びている。そして、アンビル１と超音波変換器１８との間に、チューブ状容器材料１７が挟まれて、押圧されるようになっている。
【００１１】
このアンビル１は、チューブ状容器材料１７の長手方向にシールされた部分５を収容するための、断面がアーチ形状の溝２を備える。また、図３において明瞭に示されているように、アーチ形状の溝２の深さとほぼ同じ深さの凹み部分３が、アーチ形状の溝２の両側に備えられている。図１において符号４は、横断方向シール形成部分を示しており、この横断方向シール形成部分４に沿って、後に説明する横断方向のシール７（図５参照）が形成される。
【００１２】
アーチ形状の溝２の断面は、図４で見るごとく、幅（Ｋ）に対して、深さ（Ｇ）が相当に小さく、大径の円の円弧の一部分にほぼ相当する形状であり、底の部分は、ほとんど平坦になっている。アーチ形状の溝２は、一対の変換器ヘッド１８ａ，１８ｂの間の間隙１６に対応して位置される。
【００１３】
図７の（ａ）及び図７の（ｂ）は、アンビル１のアーチ形状の凹み部分３と、チューブ状容器材料１７の長手方向にシールされた部分５との位置関係を示すものであり、図７の（ａ）が整合された場合、図７の（ｂ）がチューブ状容器材料１７がねじれて配置されることなどに起因して生ずる不整合の場合を示している。本発明のアンビル１のアーチ形状の凹み部分３の断面は、前述した如く、大径の円の円弧の一部分にほぼ担当するもので、深さが浅く、平坦な部分３ａを有しており、両端半分部の部分３ｂは大きな半径を有することによって後壁半分部１３の端部１３ａが、図７の（ｂ）に示す程度の不整合の結果、図示されたような位置にある場合でも、この端部１３ａをアーチ形状の凹み部分３の端部分３ｂが凹み部分３内に押し込んで、図１２の（ｂ）で前述した如き喰み込みが生ずることが阻止できる。従って、チューブ状容器材料７の長手方向にシールされた部分５と凹み部分３との間に多少の不整合があっても、凹み部分３の端部分３ｂが後壁の端部１３ａを押圧して、シール圧力を維持することができるのである。その結果として、横断方向のシール７（図５参照）に漏れが生ずるような不良個所が形成されることはない。
【００１４】
このように、断面がほぼ大径の円の円弧の一部分に相当する如きアーチ形状の凹み部分３を備えることは、過大なエネルギを分散させるのに有利である。超音波変換器１８は図１０に示すように一対の変換器ヘッド１８ａ，１８ｂを有していて、その間隙１６に相当するアンビル１上の位置には過大なエネルギが集中される。本発明におけるアーチ形状の溝２は、かようなエネルギ集中を阻止して、長手方向にシールされた部分５に適切なエネルギが適用されるようにするのである。
【００１５】
本発明におけるアーチ形状の溝２は、図５に示す如く、チューブ状容器材料１７の横断方向のシール７に小さなマーク９を付ける役目をも果たす。図５において、符号６はフイン折り目を示し、符号８は切断ラインを示している。図６の（ａ）、図６の（ｂ）、図６の（ｃ）は、マーク９の位置によって、チューブ状容器材料１７がどちらの方向にねじれて置かれて、長手方向にシールされた部分５と凹み部分３とが不整合となったかが判別できることを示している。図６の（ａ）はチューブ状容器材料１７が反時計方向にねじれて置かれたことを、図６の（ｂ）は正しく、整合されて置かれたことを、図６の（ｃ）は時計方向にねじれて置かれたことを示している。
【００１６】
【実施例】
図２、図４、図８、及び図９を参照して、本発明におけるアンビル１の大きさ寸法の実施例を説明する。
チューブ状容器材料１７のチューブの直径が５４．１ｍｍ、一対の変換器ヘッドの幅が５４．５ｍｍ、一対の変換器ヘッドの間隙１６が０．３ｍｍであるとする。
図２のＧは８±０．２ｍｍ、Ｈは１±０．０３ｍｍであり、図４のＧは０．３±０．０５ｍｍ、Ｋは１±０．０４ｍｍであり、図８のＡは１５５ｍｍ、Ｂは７７．５±０．２ｍｍ、
【外１】

Figure 0003904675
であり、図９のＤは１２２ｍｍ、Ｅは１２６．２ｍｍである。
【００１７】
【発明の効果】
本発明によれば、アンビルに断面がアーチ形状の凹み部分を備えたことによって、横断方向に超音波シールすべきチューブ状容器材料のねじれなどによる配置の不整合を大幅に緩和することができ、ある程度の不整合があっても横断方向のシールを良好に超音波シールすることができるという効果を奏する。かくて、横断方向のシールと長手方向のシール部分との交差点付近における横断方向のシールから内容物が漏れ出すという恐れは阻止される。
本発明によれば、不整合の範囲を従来のものに対して約５０％以上緩和することが可能である。
更に、アンビルに断面がアーチ形状の凹み部分を備えることにより、この凹み部分において、一対の変換器ヘッドから生じる過大なエネルギが分散され、横断方向のシールと長手方向のシール部分との交差点において適用されるエネルギを適切なものとなし得る。
【図面の簡単な説明】
【図１】本発明において採用されるアンビルの一実施形態の斜視図。
【図２】図１の符号Ｍの部分の拡大平面図。
【図３】図２の一部側面図。
【図４】図３の符号Ｎの部分の拡大側面図。
【図５】チューブ状容器材料に横断方向のシールが施された状態を示す平面図。
【図６】（ａ）は、チューブ状容器材料が反時計方向にねじれて配置されたことを示す図。
（ｂ）は、チューブ状容器材料が正しく整合されて配置されたことを示す図。
（ｃ）は、チューブ状容器材料が時計方向にねじれて配置されたことを示す図。
【図７】（ａ）は、本発明におけるアーチ形状の凹み部分と、長手方向にシールされた部分との整合状態を説明する図。
（ｂ）は、本発明におけるアーチ形状の凹み部分と、長手方向にシールされた部分との不整合状態を説明する図。
【図８】本発明におけるアンビルの一実施形態の平面図。
【図９】図８のアンビルの側面図。
【図１０】超音波シール装置の全体を示す一部側面図。
【図１１】従来技術におけるアンビルの構造を一部断面で示す側面図。
【図１２】（ａ）は、従来技術におけるアンビルの凹み部分と、長手方向にシールされた部分との整合状態を説明する図。
（ｂ）は、従来技術におけるアンビルの凹み部分と、長手方向にシールされた部分との不整合状態を説明する図。
【符号の説明】
１ アンビル
２ アーチ形状の溝
３ 凹み部分
３ａ 平坦な部分
３ｂ 周囲の部分
４ 横断方向シール形成部分
５ 長手方向にシールされた部分
６ フイン折り目
７ 横断方向のシール
８ 切断ライン
９ マーク
１０ 場所（交差点）
１１ 凹み部分
１１ａ 凹み部分
１２ 前壁
１３ 後壁半部分
１３ａ 端部
１４ 後壁半部分
１４ａ シール不良の場所
１５ 移動可能部材
１６ 間隙
１７ チューブ状容器材料
１８ 超音波変換器
１８ａ 変換器ヘッド
１８ｂ 変換器ヘッド
１９ アンビル
１９ａ アンビル[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ultrasonic sealing device that seals a tubular container material in a transverse direction. For example, a liquid food or the like is contained in a tubular container material that is sealed in a longitudinal direction, and the longitudinal direction is accommodated. The present invention relates to an ultrasonic sealing apparatus for sealing in a transverse direction at regular intervals to form a pillow-shaped package and then forming the package into a rectangular parallelepiped shape.
[0002]
[Prior art]
Referring to FIG. 10, a side view of an ultrasonic sealing device for sealing a tubular container material in a transverse direction is shown. The ultrasonic sealing device has an anvil 19 and an ultrasonic transducer 18. The tubular container material 17 has a portion 5 in which a front wall 12, a rear wall half 13 and a rear wall half 14 are overlapped and sealed in the longitudinal direction. The anvil 19 is disposed in contact with the rear walls 13 and 14 of the tubular container material 17 and extends in the transverse direction of the tubular container material 17.
[0003]
The ultrasonic transducer 18 has a pair of transducer heads 18a, 18b, a gap 16 is defined between the pair of transducer heads 18a, 18b, and the front wall 12 of the tubular container material 17 is The tube-shaped container material 17 is sandwiched and pressed between the anvil 19 and the ultrasonic transducer 18. The longitudinally sealed portion 5 of the tubular container material 17 is positioned corresponding to the gap 16 between the pair of transducer heads 18a, 18b. Thus, at the place indicated by reference numeral 10, the longitudinally sealed portion 5 of the tubular container material 17 intersects the transversely sealed portion (see reference numeral 7 in FIG. 5). .
[0004]
The pair of conversion heads 18a and 18b generate ultrasonic energy and seal the tubular container material 17 sandwiched between the anvil 19 in the transverse direction. Since the thickness of the longitudinally sealed portion 5 of the tubular container material 17 is thicker than other portions, a recess 11 (see FIG. 12A) for accommodating this portion 5 is provided in the anvil 19. Preparation was done. As shown in FIG. 12A, the recess 11 had a substantially trapezoidal cross section.
[0005]
However, as shown in FIG. 12 (a), there is no problem as long as the longitudinally sealed portion 5 of the tubular container material 17 is closely aligned in the recess 11, but FIG. As shown in (b), when the tubular container material 17 is twisted and arranged, the longitudinally sealed portion 5 is not aligned with the recess 11, and the end 13a of the rear wall half 13 is recessed. The end portion 13a is sandwiched and the end portion 13a is sandwiched, the portion 5 sealed in the longitudinal direction is not sufficiently pressed, and the transverse seal becomes defective at the place indicated by reference numeral 14a. Will cause the contents to leak.
[0006]
In order to prevent this problem, if the width of the recess 11 is increased, this also causes a decrease in the sealing pressure, resulting in poor transverse sealing.
[0007]
In the prior art, in order to fundamentally improve such a problem, an anvil 19a having a structure as shown in FIG. 11 has been provided. Here, each movable member 15 is provided with a plurality of movable members 15 in the recess 11a of the anvil 19a, corresponding to the position of the longitudinally sealed portion 5 of the arranged tubular container material 17. 15 is adjusted so as to form a recess so that the longitudinally sealed portion 5 is closely aligned.
[0008]
[Problems to be solved by the invention]
The conventional improved anvil 19a shown in FIG. 11 employs a very complicated structure in which a plurality of movable members 15 are provided in the recess 11a. The present invention is capable of cleverly solving the above-mentioned problems in the prior art without having such a complicated structure and having a very simple configuration, so as not to cause a defective portion of the transverse seal. An object of the present invention is to provide an ultrasonic sealing device that seals a tubular container material in a transverse direction.
[0009]
[Means for Solving the Problems]
If reference numerals used in the embodiments of the invention to be described later are added and described for reference, the present invention includes a front wall 12 and rear walls 13 and 14 each having a longitudinally sealed portion 5. An ultrasonic sealing device for sealing a configured elongated tubular container material 17 in a transverse direction,
An anvil 1 disposed in contact with the rear walls 13, 14 of the tubular container material 17 and extending in a transverse direction of the tubular container material 17;
The tube-shaped container material 17 is disposed in contact with the front wall 12 and pressed while sandwiching the tube-shaped container material 17 between the anvil 1 and the tube-shaped container material 17 is sealed in the transverse direction. An ultrasonic transducer 18, and
The ultrasonic transducer 18 has a pair of transducer heads 18a and 18b, and a gap 16 is defined between the pair of transducer heads 18a and 18b. The gap 16 of the pair of transducer heads 18a, 18b is positioned corresponding to the portion 5 sealed in the direction,
In order to accommodate the longitudinally sealed portion 5 of the tubular container material 17, the anvil 1 has a recessed portion 2 at a position corresponding to the gap 16, and the recessed portion 2 extends in the longitudinal direction. The vertical cross section is characterized by an arch shape.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIG. 1, a perspective view of an anvil 1 employed in the present invention is shown. 2 is an enlarged view of a portion indicated by reference numeral M in FIG. 1, FIG. 3 is a side view of FIG. 2, and FIG. 4 is an enlarged view of the portion indicated by reference numeral N in FIG. It is.
This anvil 1 is used in place of the anvil 19 described above with reference to FIG. Thus, the anvil 1 is disposed in contact with the rear walls 13, 14 of the tubular container material 17 and extends in the transverse direction of the tubular container material 17. A tubular container material 17 is sandwiched and pressed between the anvil 1 and the ultrasonic transducer 18.
[0011]
The anvil 1 is provided with a groove 2 having an arched cross section for accommodating the longitudinally sealed portion 5 of the tubular container material 17. As clearly shown in FIG. 3, recessed portions 3 having substantially the same depth as that of the arch-shaped groove 2 are provided on both sides of the arch-shaped groove 2. In FIG. 1, reference numeral 4 denotes a transverse seal forming portion, and a transverse seal 7 (see FIG. 5) described later is formed along the transverse seal forming portion 4.
[0012]
As shown in FIG. 4, the cross section of the arch-shaped groove 2 has a shape in which the depth (G) is considerably smaller than the width (K) and substantially corresponds to a part of a circular arc of a large diameter circle. This part is almost flat. The arcuate groove 2 is positioned corresponding to the gap 16 between the pair of transducer heads 18a, 18b.
[0013]
FIGS. 7A and 7B show the positional relationship between the arch-shaped recessed portion 3 of the anvil 1 and the portion 5 sealed in the longitudinal direction of the tubular container material 17. When (a) of FIG. 7 is aligned, (b) of FIG. 7 shows a case of mismatch caused by the tube-shaped container material 17 being twisted and arranged. As described above, the cross section of the arch-shaped recessed portion 3 of the anvil 1 of the present invention is almost in charge of a part of the circular arc of the large-diameter circle, and has a shallow portion and a flat portion 3a. Even if both end half portions 3b have a large radius, the end portion 13a of the rear wall half portion 13 is in the position shown in the figure as a result of misalignment to the extent shown in FIG. It can be prevented that the end portion 3a is pushed into the recessed portion 3 by the end portion 3b of the arch-shaped recessed portion 3 and the biting as described above with reference to FIG. Therefore, even if there is some mismatch between the longitudinally sealed portion 5 of the tubular container material 7 and the recessed portion 3, the end portion 3b of the recessed portion 3 presses the end portion 13a of the rear wall. Thus, the sealing pressure can be maintained. As a result, a defective portion that does not leak is not formed in the transverse seal 7 (see FIG. 5).
[0014]
As described above, it is advantageous to disperse excessive energy by providing the arch-shaped recessed portion 3 whose cross section corresponds to a part of a circular arc having a substantially large diameter. As shown in FIG. 10, the ultrasonic transducer 18 has a pair of transducer heads 18 a and 18 b, and excessive energy is concentrated at a position on the anvil 1 corresponding to the gap 16. The arch-shaped groove 2 in the present invention prevents such energy concentration so that appropriate energy is applied to the longitudinally sealed portion 5.
[0015]
The arch-shaped groove 2 in the present invention also serves to attach a small mark 9 to the transverse seal 7 of the tubular container material 17 as shown in FIG. In FIG. 5, reference numeral 6 indicates a fin fold, and reference numeral 8 indicates a cutting line. 6 (a), 6 (b), and 6 (c), the tubular container material 17 is twisted in either direction and sealed in the longitudinal direction depending on the position of the mark 9. This shows that it is possible to determine whether the portion 5 and the recessed portion 3 are mismatched. FIG. 6 (a) shows that the tubular container material 17 has been placed twisted counterclockwise, FIG. 6 (b) shows that it has been placed correctly and aligned, and FIG. 6 (c) shows that It shows that it was twisted clockwise.
[0016]
【Example】
With reference to FIG.2, FIG.4, FIG.8 and FIG. 9, the Example of the magnitude | size dimension of the anvil 1 in this invention is described.
It is assumed that the tube diameter of the tube-shaped container material 17 is 54.1 mm, the width of the pair of transducer heads is 54.5 mm, and the gap 16 between the pair of transducer heads is 0.3 mm.
G in FIG. 2 is 8 ± 0.2 mm, H is 1 ± 0.03 mm, G in FIG. 4 is 0.3 ± 0.05 mm, K is 1 ± 0.04 mm, and A in FIG. 8 is 155 mm. , B is 77.5 ± 0.2 mm,
[Outside 1]
Figure 0003904675
In FIG. 9, D is 122 mm and E is 126.2 mm.
[0017]
【The invention's effect】
According to the present invention, by providing the anvil with the arch-shaped recessed portion in the cross section, it is possible to greatly relieve misalignment due to twisting of the tubular container material to be ultrasonically sealed in the transverse direction, Even if there is a certain degree of misalignment, the transverse seal can be satisfactorily ultrasonically sealed. Thus, the risk of content leaking from the transverse seal near the intersection of the transverse seal and the longitudinal seal portion is prevented.
According to the present invention, it is possible to reduce the mismatch range by about 50% or more compared to the conventional one.
Furthermore, by providing the anvil with a arch-shaped recess in the anvil, excessive energy from the pair of transducer heads is distributed in the recess and applied at the intersection of the transverse seal and the longitudinal seal. Can be made appropriate energy.
[Brief description of the drawings]
FIG. 1 is a perspective view of an embodiment of an anvil employed in the present invention.
FIG. 2 is an enlarged plan view of a portion indicated by a symbol M in FIG.
FIG. 3 is a partial side view of FIG. 2;
4 is an enlarged side view of a portion N in FIG. 3;
FIG. 5 is a plan view showing a state in which a transverse seal is applied to the tubular container material.
FIG. 6A is a view showing that the tubular container material is twisted counterclockwise.
(B) is a figure which shows that the tubular container material was arrange | positioned correctly aligned.
(C) is a diagram showing that the tubular container material is twisted in the clockwise direction.
FIG. 7A is a diagram for explaining an alignment state between an arch-shaped recessed portion and a portion sealed in the longitudinal direction according to the present invention.
(B) is a figure explaining the mismatching state of the arch-shaped recessed part in this invention, and the part sealed in the longitudinal direction.
FIG. 8 is a plan view of an embodiment of an anvil according to the present invention.
9 is a side view of the anvil of FIG. 8. FIG.
FIG. 10 is a partial side view showing the entire ultrasonic sealing apparatus.
FIG. 11 is a side view showing a part of a structure of an anvil in the prior art.
FIG. 12A is a view for explaining a state of alignment between a recessed portion of an anvil and a portion sealed in the longitudinal direction in the prior art.
(B) is a figure explaining the mismatching state of the recessed part of the anvil in a prior art, and the part sealed in the longitudinal direction.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Anvil 2 Arch-shaped groove 3 Recessed part 3a Flat part 3b Peripheral part 4 Transverse seal forming part 5 Long-side sealed part 6 Fin crease 7 Transverse seal 8 Cutting line 9 Mark 10 Location (intersection)
DESCRIPTION OF SYMBOLS 11 Recessed part 11a Recessed part 12 Front wall 13 Rear wall half part 13a End part 14 Rear wall half part 14a Sealed place 15 Moveable member 16 Gap 17 Tubular container material 18 Ultrasonic transducer 18a Transducer head 18b Transducer Head 19 anvil 19a anvil

Claims (2)

前壁と、長手方向にシールされた部分を有する後壁とで構成された細長いチューブ状容器材料を横断方向にシールする超音波シール装置であって、
前記チューブ状容器材料の前記後壁に接触して配置され、前記チューブ状容器材料の横断方向に延びるアンビルと、
前記チューブ状容器材料の前記前壁に接触して配置され、前記チューブ状容器材料を前記アンビルとの間に挟んで押圧するとともに、前記チューブ状容器材料を横断方向にシールする超音波変換器とを含み、
前記超音波変換器は、一対の変換器ヘッドを有し、この一対の変換器ヘッド間には間隙が画成されており、前記チューブ状容器材料の前記長手方向にシールされた部分に対応して前記間隙が位置するようにされており、
前記チューブ状容器材料の前記長手方向にシールされた部分を収容するために、前記アンビルは前記間隙に対応する位置に凹み部分を有し、この凹み部分の前記長手方向に垂直な断面は、アーチ形状であることを特徴とする超音波シール装置。An ultrasonic sealing device for transversely sealing an elongated tubular container material composed of a front wall and a rear wall having a longitudinally sealed portion,
An anvil disposed in contact with the rear wall of the tubular container material and extending in a transverse direction of the tubular container material;
An ultrasonic transducer that is disposed in contact with the front wall of the tubular container material, presses the tubular container material between the anvil and seals the tubular container material in a transverse direction; Including
The ultrasonic transducer has a pair of transducer heads, and a gap is defined between the pair of transducer heads, corresponding to the longitudinally sealed portion of the tubular container material. And the gap is positioned,
In order to accommodate the longitudinally sealed portion of the tubular container material, the anvil has a recessed portion at a position corresponding to the gap, and a cross section perpendicular to the longitudinal direction of the recessed portion is an arch An ultrasonic sealing device having a shape. さらに、前記アンビルが前記一対の変換器ヘッドの間の間隙に対応する位置に溝を有し、前記溝の幅が前記間隙の幅より大きく、かつ前記凹み部分の幅より小さいことを特徴とする請求項１に記載の超音波シール装置。Furthermore, the anvil has a groove at a position corresponding to the gap between the pair of transducer heads, and the width of the groove is larger than the width of the gap and smaller than the width of the recessed portion. The ultrasonic sealing device according to claim 1.
JP18872097A 1997-07-14 1997-07-14 Ultrasonic sealing device that seals tubular container material in the transverse direction Expired - Lifetime JP3904675B2 (en)

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WO2018051835A1 (en) * 2016-09-13 2018-03-22 凸版印刷株式会社 Anvil and ultrasonic sealing device
US20190202587A1 (en) * 2016-09-13 2019-07-04 Toppan Printing Co., Ltd. Anvil and ultrasonic sealing apparatus
US10683118B2 (en) 2016-09-13 2020-06-16 Toppan Printing Co., Ltd. Anvil and ultrasonic sealing apparatus
WO2019069986A1 (en) 2017-10-03 2019-04-11 凸版印刷株式会社 Ultrasonic sealing anvil and ultrasonic sealing device
JPWO2019069986A1 (en) * 2017-10-03 2020-09-10 凸版印刷株式会社 Anvil and ultrasonic sealing device for ultrasonic sealing
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