JP4352166B2 - Container sealing device - Google Patents

Container sealing device Download PDF

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Publication number
JP4352166B2
JP4352166B2 JP2003113173A JP2003113173A JP4352166B2 JP 4352166 B2 JP4352166 B2 JP 4352166B2 JP 2003113173 A JP2003113173 A JP 2003113173A JP 2003113173 A JP2003113173 A JP 2003113173A JP 4352166 B2 JP4352166 B2 JP 4352166B2
Authority
JP
Japan
Prior art keywords
container
seal
lid
sealing device
recess
Prior art date
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 - Fee Related
Application number
JP2003113173A
Other languages
Japanese (ja)
Other versions
JP2004315050A (en
Inventor
哲也 井内
隆雄 三木
正夫 信田
啓一 寺田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shikoku Kakoki Co Ltd
Original Assignee
Shikoku Kakoki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shikoku Kakoki Co Ltd filed Critical Shikoku Kakoki Co Ltd
Priority to JP2003113173A priority Critical patent/JP4352166B2/en
Priority to US10/709,095 priority patent/US20040206048A1/en
Publication of JP2004315050A publication Critical patent/JP2004315050A/en
Application granted granted Critical
Publication of JP4352166B2 publication Critical patent/JP4352166B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7451—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7461—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool for making welds and cuts of other than simple rectilinear form
    • 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
    • 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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being circular
    • 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
    • B29C66/343—Making tension-free or wrinkle-free 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
    • B29C66/50—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
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • 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
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential 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
    • B29C66/80—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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/162—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by feeding web material to securing means
    • B65B7/164—Securing by heat-sealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Closing Of Containers (AREA)
  • Package Closures (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、例えば、デザート等を収めたカップ状容器の口部を帯状蓋材で密封する密封装置に関する。
【０００２】
【従来の技術】
この種の従来装置としては、容器の下細りテーパ状胴壁内面に蓋の周縁部をシールするシールヘッドを備えており、シールヘッドに、同胴壁内面と合致するシール押え面が形成されており、シール押え面の全体が、凹凸の無い平滑面となされているものが知られている（例えば、特許文献１参照。）。
【０００３】
【特許文献１】
特開２００２−２５５１０３号公報
【０００４】
【発明が解決しようとする課題】
シール時における蓋の周縁部には弛みが生じることは避けられない。弛みをシールヘッドのシール押え面で押さえると、弛みは行き場を失って皺になる。皺は、襞状に折畳まれてシールされる。シールされた皺の大小およびその発生場所は、容器のシール面の周方向に均一ではなく、偏りがある。大きい皺が発生するところや皺が多く発生するところではシール圧が十分に取れずにシール不良となる。一方、皺の偏りはシール面の美観に影響を与える。
【０００５】
この発明の目的は、シール不良を無くし、シール面の美観を向上させることのできる容器密封装置を提供することにある。
【０００６】
【課題を解決するための手段】
この発明による容器密封装置は、容器の下細りテーパ状胴壁内面に蓋の周縁部をシールするシールヘッドを備えており、シールヘッドに、同胴壁内面と合致するシール押え面が形成されている容器密封装置において、シール押え面の周方向複数か所に、シール時における蓋周縁部の弛みを案内しうる凹所が形成されていることを特徴とするものである。
【０００７】
この発明による容器密封装置では、シール時における蓋周縁部の弛みは凹所に案内され、弛みに起因する皺は、シール面の所定の複数箇所にできるようになる。
【０００８】
また、従来、この種の容器密封装置では、シール後の容器内が容器外に比べて陽圧となる傾向があったが、凹所があると、シール後の容器内は陽圧になり難いことも分かった。容器内が陽圧となると、容器内のエアーは容器と蓋のシールが比較的弱い部分を通じて容器外に逃げようとし、その逃げようとする部分にはピンホールが形成されてシール不良となる。容器内が陽圧になり難い原因としては、凹所がエアー抜き通路を形成し、これを通じて、容器胴壁と蓋周縁部の間からエアーが抜けることによると推察される。
【０００９】
したがって、この発明によれば、皺の偏りに起因するシール不良を防止することに加え、シール後の容器内圧に起因するシール不良をも防止することができる。
【００１０】
さらに、シール押え面に上部領域および下部領域が形成され、凹所が、下部領域に位置させられていると、下部領域で弛みを案内し、上部領域で確実にシールすることができる。
【００１１】
また、凹所の下端が開放されていると、蓋が折曲げられていく際、折曲げ当初より、シール押え面の下端に達している凹所によって皺が案内されるので、皺が凹所によって案内され易く、皺の形成に好適である。しかも、凹所によって形成されるエアー抜き通路を通じて、エアーを効率良く抜くことができ、一層のシール不良防止に効果的である。
【００１２】
また、凹所が、上下方向にのびた溝の形態をなし、隣り合う凹所同士の間隔が一定であると、皺が均一にできるため、シール面の美観を向上させることができる。
【００１３】
また、凹所の幅と、隣り合う凹所同士の間隔とがほぼ一致させられていると、さらなる美観の向上に貢献することができる。
【００１４】
また、容器を保持するホルダを備えており、ホルダに容器挿入孔が形成され、容器挿入孔の周面上端部に、シール押え面と対応するシール受け面が形成され、シール受け面の内径が、全長にわたって一定でありかつ容器胴壁上端部の外径と等しくなされていると、シール押え面およびシール受け面の楔作用により、シール性が向上させられる。
【００１５】
【発明の実施の形態】
この発明の実施の形態を図面を参照してつぎに説明する。
【００１６】
図８を参照すると、この発明による容器密封装置によって製造された容器Ｃおよび蓋Ｌが示されている。
【００１７】
容器Ｃは、紙製の丸カップ状のもので、下細りテーパ状胴壁Ｂを有している。胴壁Ｂ上端開口縁部にはカーリング部Ｋが設けられている。蓋Ｌは、熱可塑性プラスチックフィルム製蓋材Ｆから打抜かれたもので、胴壁Ｂ上端開口に落とし込まれて立上り縁部Ｒを形成し、これの外周面が胴壁Ｂ上端内周面にヒートシールされているものである。立上り縁部Ｒの下部領域には多数の内方突出状縦皺Ｍが一定間隔で形成されている。立上り縁部Ｒの外周の一部に連なってつまみＴが設けられている。
【００１８】
容器密封装置は、図１および図２に示すように、回転中心Ｍから所定距離を隔てた円周上に複数の容器ホルダ11（図示は１つのみ）が等間隔で設けられかつ容器ホルダ11がシールステーションＳで順次停止させられるように間欠的に駆動される水平ターンテーブル12と、シールステーションＳで停止させられた容器ホルダ11の上方を帯状蓋材Ｆが横切るように蓋材ＦをシールステーションＳに供給する蓋材移送装置13と、シールステーションＳにおけるターンテーブル12の上方に配置されている昇降体14と、昇降体14に垂下状に取付けられかつ帯状蓋材Ｆを蓋Ｌとこれの残余の蓋材Ｆとに分離するように蓋材Ｆを容器口縁部にそって打抜く垂直筒状カッタ15と、カッタ15の内側に配置されかつ打抜かれた蓋Ｌの周縁部を容器口縁部の内面にシールするシールヘッド16と、カッタ15を取り囲むように配置されている蓋材押え17とを備えている。
【００１９】
容器ホルダ11は、方形水平板状のもので、上下貫通円形状容器保持孔21を有している。図３に詳細に示すように、容器保持孔21の内径はその全長にわたって一定でありかつ胴壁Ｂ上端の外径と等しくなされている。容器保持孔21の周面上端部にはシール受け面22が形成されている。シール受け面22の上端開口縁部には容器受け面24が、これを取囲むように環状カッタ逃げ溝23がそれぞれ形成されている。カッタ逃げ溝23は、全体的には円環状であるが、つまみＴに対応する部分には膨出部23aを有している。容器ホルダ11上面において、カッタ逃げ溝23の外側に蓋材受け面25が形成されている。容器受け面24よりも蓋材受け面25が高レベルとなされている。
【００２０】
容器保持孔21に胴壁Ｂがはめ入れられて容器受け面24でカーリング部Ｋが受けられることにより、容器Ｃがホルダ11に保持されるようになっている。
【００２１】
昇降体14は、支持部材31に垂直下向きに取付られた第１流体圧シリンダ32によって昇降させられる水平板状頂板33と、頂板33の下方に間隔をおいて配置されている水平板状底板34と、頂板33および底板34の外周縁部複数カ所に介在させられている垂直棒状第１スペーサ35と、頂板33上面中央に垂直下向きに取付けられかつ第１流体圧シリンダ32のピストンロッドに連結されている第２流体圧シリンダ36とを備えている。
【００２２】
第１流体圧シリンダ32には第１ガイドロッド41が垂直下向きに取付けられている。第１ガイドロッド41は、第１スペーサ35の近くで頂板33に摺動自在に貫通させられている。
【００２３】
頂板33の中央部には、第２流体圧シリンダ36のピストンロッドを挿通させたロッド孔42が形成されている。底板34の中央部にはヘッド孔43が形成されている。ヘッド孔43の縁部には垂直筒状容器押え52が垂下状に設けられている。 第２流体圧シリンダ36のピストンロッドには水平円板状ヘッド取付板44が連結されている。ヘッド取付板44上面の周縁部複数カ所には第２ガイドロッド45が直立状に設けられている。第２ガイドロッド45は、第２流体圧シリンダ36と第１ガイドロッド41間において頂板33に摺動自在に貫通させられてその上方に突出させられている。第２ガイドロッド45の上方突出端にはストッパ46が設けられている。頂板33とストッパ46の間には、第２ガイドロッド45の上方突出部にはめられた第２スペーサ47が介在させられている。
【００２４】
カッタ15は、容器押え52を取囲むように底板34下面から固定状に吊下げられかつ下端に、カッタ逃げ溝23の真上に位置させた刃51を有している。
【００２５】
シールヘッド16は、ヘッド取付板44下面に垂下状に取付けられかつ下端部をヘッド孔43に入り込ませている垂直筒状ヒータ61と、ヒータ61の下端面に取付けられかつヒータ61によって加熱されるリング状シール部材62とを備えている。
【００２６】
シール部材62下面の外周部には下方突出環状部71が設けられている。シール部材62の環状部71を含む外周面には、容器胴壁Ｂ内面に合致する下細りテーパ状シール押え面72が設けられている。
【００２７】
ヘッド取付板44下面中央には、シールヘッド16の軸中心をのびるように吊下げロッド73が垂下状に設けられている。吊下げロッド73の下端部には蓋吸着部材74が取付けられている。蓋吸着部材74は、水平円板状のもので、その外周部分を環状部71の内側に入り込ませている。蓋吸着部材74の下面は、わずかであるが、環状部71下面より下方に突出させられている。
【００２８】
ヘッド取付板44の外周面から中心に向かって有底横吸引孔75が形成されるとともに、横吸引孔75の底から吊下げロッド73の軸心を縦吸引孔76が下向きにのびている。縦吸引孔76の下端は、蓋吸着部材74の下面に開口させられている。
【００２９】
蓋材押え17は、平面より見て、蓋材受け面25と同形状の水平板状のものである。蓋材押え17の下面全体には弾性材81が被覆されている。蓋材押え17の上面複数カ所には第３ガイドロッド82が直立状に設けられている。第３ガイドロッド82の上端部は、底板34に摺動自在に貫通させられている。第３ガイドロッド82の上方突出端にはストッパ83が設けられている。底板34と蓋材押え17の間には、第３ガイドロッド82にはめられた第２圧縮コイルばね84が介在させられている。
【００３０】
図３および図４に詳細に示すように、シール部材62外周面のシール押え面72上方はストレートな円筒面である。シール押え面72の高さの中程を境界として、上部領域91および下部領域92が形成されている。上部領域91は全周にわたって平滑であるが、下部領域92には多数の凹所93が周方向に等間隔で形成されている。各凹所93は、上下方向にのびた溝のような形をしていて、その下端は下方に開放されている。凹所93の幅Ｗ1、隣り合う凹所93の間隔Ｗ2は、ほぼ等しい。ただし、凹所78の数は、適宜変更されるものであって、４〜３６０程度の範囲で、好ましくは、１０〜１２０の範囲で変更される。図７を参照すると、凹所93の底面は断面円弧状の輪郭をなすものである。また、凹所93の深さは、凹所93の幅Ｗ1の１／４以上であることが好ましい。
【００３１】
第１流体圧シリンダ32の作動により、昇降体14が昇降させられ、第２流体圧シリンダ36の作動により、シールヘッド16が昇降体14に対して昇降させられる。
【００３２】
図１に示すように、昇降体14がその昇降ストローク上限に位置させられるとともに、シールヘッド16がその昇降ストローク上限に位置させられた状態で、蓋材押え17下面および蓋吸着部材74下面は、ほぼ同レベルであり、このレベル
よりもカッタ15の刃51のレベルは高くなっている。
【００３３】
また、この状態で、第１流体圧シリンダ32のピストンロッドは、退入端に位置させられ、第２流体圧シリンダ36のピストンロッドは、突出端に位置させられている。このときに、第２流体圧シリンダ36へのエア供給は停止させられていて、そのピストンロッドを上向きに押圧すると、同ピストンロッドは自由に退入させられるようになっている。
【００３４】
つぎに、図５および図６を参照して、容器密封動作を説明する。
【００３５】
図５(a)は、図１と同じ状態を示すものである。図５(b)に示すように、蓋材押え17および蓋吸着部材74が蓋材Ｆにそれぞれ接触する位置まで昇降体14を下降させる。
【００３６】
ついで、昇降体14を下降させると、図５(c)に示すように、第２圧縮コイルばね84を圧縮させることにより、そのばね力によって蓋材押え17は蓋材Ｆを押えたまま、カッタ15が蓋材Ｆに接触させられる。これと同時に、蓋材Ｆの抗力がシールヘッド16等の自重に打勝ち、第２流体圧シリンダ36のピストンロッドを退入させることにより、シールヘッド16が昇降体14に対して相対的に上昇させられる。
【００３７】
さらに、図６(d)に示すように、昇降体14を下降させ、昇降体14が下限まで下降する間に、カッタ15が蓋材Ｆを打抜いて蓋Ｌが得られる。蓋Ｌの打抜きの際に、カッタ15を挟んでその外側からは第２圧縮コイルばね84のばね力が、その内側からはシールヘッド16等の重力が蓋材Ｆにそれぞれ作用させられる。これにより、打抜きか所のずれが防止され、カッタ15の切断性能が向上させられる。打抜かれた蓋Ｌは、蓋吸着部材74によって吸着される。
【００３８】
昇降体14が下限まで下降すると、図６(e)に示すように、第２流体圧シリンダ36にエアを供給してそのピストンロッドを突出させ、シールヘッド16を下降させる。そうすると、蓋吸着部材74が蓋Ｌを吸着したままで、シール部材62は、容器胴壁Ｂ内に入り込む。このときに、蓋ＬのつまみＴを含む外周部は、立上り縁部Ｒを形成する。容器胴壁Ｂ内に入り込んだシール部材62のシール押え面72は、容器胴壁Ｂおよび立上り縁部Ｒを介して容器ホルダ11のシール受け面22に押圧される。これにより、容器胴壁Ｂおよび立上り縁部Ｒのヒートシールが行われる。
【００３９】
ヒートシールに際し、シール押え面72が下細りのテーパ状であるのに対し、シール受け面22は垂直である。したがって、シール押え面72およびシール受け面22の間には均一なシール圧が発生するのではなくて、双方の面72、22の上から下にかけて漸次小さくなるシール圧が発生する。そのため、シール圧の大きい部分程強くシールされることなり、シール性が向上する。
【００４０】
さらに、シール部材62の上部領域91によってシールされる部分は全周にわたって均一にシールされる。一方、下部領域92によってシールされる部分は、凹所93の無い部分だけがシールされる。このときに生じた蓋の周縁部の弛みは、図７に示すように、凹所93内において皺Ｍとなるが、皺Ｍはシールされることは無い。
【００４１】
さらに、シール時に、容器のシール面と蓋の周縁部下面の間から、エアは凹所93を通じて排出される。
【００４２】
この後、シールヘッド16は、昇降体14とともに上昇させられるが、まず、図６(f)に示すように、シールヘッド16を先に上昇させる。このときに、シールヘッド16とともにこれに付着して容器Ｃが持上げられようとしても、これを容器押え52が阻止する。この後、昇降体14を上昇させる。
【００４３】
上記において、容器がターンテーブルによって搬送される例が示されているが、容器はコンベヤで搬送するようにしてもよい。
【００４４】
さらに、上記において、凹所は下部領域にのみ形成されている例が示されているが、これ以外の例を排除するものではない。凹所は、上部領域および下部領域のいずれか、または、双方に、あるいは、双方の領域にまたがるように形成されていてもよい。しかしながら、エアー抜きの機能、皺の形状、シール性、製品としての見栄え等を総合的に考慮すると、下部領域にのみ凹所があることが好ましい。
【００４５】
【発明の効果】
この発明によれば、シール不良を無くし、シール面の美観を向上させることができる。
【図面の簡単な説明】
【図１】この発明による密封装置の垂直横断面図である。
【図２】図１のII−IIにそう水平横断面図である。
【図３】シールヘッド周辺の拡大断面図である。
【図４】シールヘッドの詳細説明図である。
【図５】同密封装置によるシール動作説明図である。
【図６】図５に続くシール動作説明図である。
【図７】シール状態説明図である。
【図８】同密封装置によってシールされた容器の斜視図である。
【符号の説明】
14 昇降体
15 カッタ
16 シールヘッド
72 シール押え面
91 上部領域
92 下部領域
93 凹所
Ｌ 蓋
Ｆ 蓋材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sealing device that seals, for example, a mouth of a cup-shaped container containing dessert or the like with a band-shaped lid member.
[0002]
[Prior art]
As this type of conventional device, a seal head for sealing the peripheral edge of the lid is provided on the inner surface of the tapered wall of the tapered bottom of the container, and a seal pressing surface that matches the inner surface of the body wall is formed on the seal head. In addition, it is known that the entire seal pressing surface is a smooth surface without unevenness (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-255103
[Problems to be solved by the invention]
It is inevitable that slack will occur at the peripheral edge of the lid during sealing. When the slack is pressed by the seal pressing surface of the seal head, the slack loses its place and becomes a habit. The scissors are folded and sealed in a scissors shape. The size and location of the sealed wrinkles are not uniform and uneven in the circumferential direction of the sealing surface of the container. In places where large wrinkles are generated or wrinkles are generated, the seal pressure is not sufficiently obtained, resulting in a seal failure. On the other hand, the wrinkle bias affects the aesthetics of the seal surface.
[0005]
An object of the present invention is to provide a container sealing device that can eliminate a sealing failure and improve the appearance of a sealing surface.
[0006]
[Means for Solving the Problems]
The container sealing device according to the present invention includes a seal head that seals the peripheral edge of the lid on the inner surface of the lower tapered barrel wall of the container, and a seal pressing surface that matches the inner surface of the barrel wall is formed on the seal head. The container sealing device according to the present invention is characterized in that a plurality of recesses that can guide the loosening of the peripheral edge of the lid during sealing are formed at a plurality of locations in the circumferential direction of the seal pressing surface.
[0007]
In the container sealing device according to the present invention, the slack in the peripheral edge of the lid during sealing is guided to the recess, and wrinkles due to the slack can be formed at a predetermined plurality of locations on the seal surface.
[0008]
Conventionally, in this type of container sealing device, the inside of the sealed container tended to be a positive pressure compared to the outside of the container. However, if there is a recess, the inside of the sealed container is less likely to be a positive pressure. I also understood that. When the inside of the container becomes positive pressure, the air in the container tends to escape to the outside of the container through a portion where the seal between the container and the lid is relatively weak, and a pinhole is formed in the portion that tries to escape, resulting in a poor seal. The reason why the inside of the container is less likely to be positive pressure is presumed to be that the recess forms an air vent passage through which air escapes from between the container body wall and the peripheral edge of the lid.
[0009]
Therefore, according to the present invention, in addition to preventing a sealing failure due to wrinkle bias, it is possible to prevent a sealing failure due to the container internal pressure after sealing.
[0010]
Further, when the upper region and the lower region are formed on the seal pressing surface and the recess is positioned in the lower region, the slack is guided in the lower region, and the upper region can be reliably sealed.
[0011]
In addition, when the lower end of the recess is open, when the lid is bent, the hook is guided by the recess reaching the lower end of the seal holding surface from the beginning of the folding, so the hook is recessed. It is easy to guide and is suitable for the formation of ridges. In addition, the air can be efficiently extracted through the air vent passage formed by the recess, which is effective in preventing further sealing failure.
[0012]
Further, if the recesses are in the form of a groove extending in the vertical direction and the distance between adjacent recesses is constant, the wrinkles can be made uniform, so that the appearance of the sealing surface can be improved.
[0013]
Moreover, if the width of the recesses and the interval between the adjacent recesses are substantially matched, it is possible to contribute to further improving the aesthetic appearance.
[0014]
In addition, a holder for holding the container is provided, a container insertion hole is formed in the holder, a seal receiving surface corresponding to the seal pressing surface is formed at the upper end of the peripheral surface of the container insertion hole, and the inner diameter of the seal receiving surface is If it is constant over the entire length and equal to the outer diameter of the upper end portion of the container body wall, the sealing performance is improved by the wedge action of the seal pressing surface and the seal receiving surface.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0016]
Referring to FIG. 8, a container C and a lid L manufactured by the container sealing device according to the present invention are shown.
[0017]
The container C is a paper-made round cup shape, and has a lower tapered barrel wall B. A curling portion K is provided on the upper end opening edge of the trunk wall B. The lid L is punched from the thermoplastic film lid material F, dropped into the upper end opening of the trunk wall B to form a rising edge R, and the outer peripheral surface thereof is the inner peripheral surface of the upper end of the trunk wall B. It is heat sealed. In the lower region of the rising edge R, a large number of inwardly projecting vertical rods M are formed at regular intervals. A knob T is provided continuously to a part of the outer periphery of the rising edge R.
[0018]
As shown in FIGS. 1 and 2, the container sealing device includes a plurality of container holders 11 (only one in the figure) provided at equal intervals on a circumference spaced a predetermined distance from the rotation center M, and the container holder 11. The lid F is sealed so that the belt-like lid F crosses the horizontal turntable 12 that is intermittently driven so that the slab is sequentially stopped at the sealing station S and the container holder 11 stopped at the sealing station S. The lid material transfer device 13 to be supplied to the station S, the elevating body 14 disposed above the turntable 12 in the sealing station S, the hanging lid 14 attached to the elevating body 14 and the belt-like lid material F as the lid L A vertical cylindrical cutter 15 for punching the cover material F along the edge of the container mouth so as to be separated into the remaining cover material F, and a peripheral portion of the cover L disposed inside the cutter 15 and punched. Seal on the inner surface of the lip The sealing head 16, and a lid material presser 17 which is arranged so as to surround the cutter 15.
[0019]
The container holder 11 has a rectangular horizontal plate shape, and has an upper and lower circular container holding hole 21. As shown in detail in FIG. 3, the inner diameter of the container holding hole 21 is constant over its entire length and is equal to the outer diameter of the upper end of the body wall B. A seal receiving surface 22 is formed at the upper end of the peripheral surface of the container holding hole 21. A container receiving surface 24 is formed at the edge of the upper end opening of the seal receiving surface 22, and an annular cutter relief groove 23 is formed so as to surround the container receiving surface 24. The cutter clearance groove 23 has an annular shape as a whole, but has a bulging portion 23a at a portion corresponding to the knob T. On the upper surface of the container holder 11, a lid receiving surface 25 is formed outside the cutter escape groove 23. The lid receiving surface 25 is higher than the container receiving surface 24.
[0020]
The container C is held by the holder 11 when the barrel wall B is fitted in the container holding hole 21 and the curling portion K is received by the container receiving surface 24.
[0021]
The elevating body 14 includes a horizontal plate-like top plate 33 that is moved up and down by a first fluid pressure cylinder 32 that is mounted vertically downward on a support member 31, and a horizontal plate-like bottom plate 34 that is disposed below the top plate 33 with an interval. A vertical bar-shaped first spacer 35 interposed at a plurality of locations on the outer peripheral edge of the top plate 33 and the bottom plate 34, and a vertically downwardly attached center of the top plate 33 and connected to a piston rod of the first fluid pressure cylinder 32. The second fluid pressure cylinder 36 is provided.
[0022]
A first guide rod 41 is attached to the first fluid pressure cylinder 32 vertically downward. The first guide rod 41 is slidably passed through the top plate 33 near the first spacer 35.
[0023]
A rod hole 42 through which the piston rod of the second fluid pressure cylinder 36 is inserted is formed at the center of the top plate 33. A head hole 43 is formed at the center of the bottom plate 34. At the edge of the head hole 43, a vertical cylindrical container presser 52 is provided in a hanging shape. A horizontal disc-shaped head mounting plate 44 is connected to the piston rod of the second fluid pressure cylinder 36. Second guide rods 45 are provided upright at a plurality of peripheral edge portions on the upper surface of the head mounting plate 44. The second guide rod 45 is slidably passed through the top plate 33 between the second fluid pressure cylinder 36 and the first guide rod 41 and protrudes upward. A stopper 46 is provided at the upper protruding end of the second guide rod 45. Between the top plate 33 and the stopper 46, a second spacer 47 fitted to the upward projecting portion of the second guide rod 45 is interposed.
[0024]
The cutter 15 has a blade 51 that is fixedly suspended from the lower surface of the bottom plate 34 so as to surround the container presser 52 and is positioned at a lower end just above the cutter escape groove 23.
[0025]
The seal head 16 is attached to the lower surface of the head mounting plate 44 in a suspended manner and has a vertical cylindrical heater 61 whose lower end is inserted into the head hole 43, and is attached to the lower end surface of the heater 61 and heated by the heater 61. And a ring-shaped seal member 62.
[0026]
A downward projecting annular portion 71 is provided on the outer peripheral portion of the lower surface of the seal member 62. On the outer peripheral surface including the annular portion 71 of the seal member 62, a lower taper-shaped seal pressing surface 72 that matches the inner surface of the container body wall B is provided.
[0027]
At the center of the lower surface of the head mounting plate 44, a hanging rod 73 is provided in a hanging shape so as to extend along the axial center of the seal head 16. A lid adsorbing member 74 is attached to the lower end portion of the hanging rod 73. The lid adsorbing member 74 is in the form of a horizontal disk, and its outer peripheral portion enters the inside of the annular portion 71. The lower surface of the lid adsorbing member 74 is slightly protruded downward from the lower surface of the annular portion 71.
[0028]
A bottomed horizontal suction hole 75 is formed from the outer peripheral surface of the head mounting plate 44 toward the center, and the vertical suction hole 76 extends downward from the bottom of the horizontal suction hole 75 along the axis of the suspension rod 73. The lower end of the vertical suction hole 76 is opened on the lower surface of the lid adsorbing member 74.
[0029]
The lid material presser 17 is a horizontal plate having the same shape as the lid material receiving surface 25 as viewed from above. The entire lower surface of the lid member presser 17 is covered with an elastic material 81. Third guide rods 82 are provided upright at a plurality of locations on the upper surface of the lid retainer 17. The upper end portion of the third guide rod 82 is slidably passed through the bottom plate 34. A stopper 83 is provided at the upper protruding end of the third guide rod 82. A second compression coil spring 84 fitted on the third guide rod 82 is interposed between the bottom plate 34 and the lid member presser 17.
[0030]
As shown in detail in FIGS. 3 and 4, the seal member 62 has a straight cylindrical surface above the seal pressing surface 72 on the outer peripheral surface. An upper region 91 and a lower region 92 are formed with the middle of the height of the seal pressing surface 72 as a boundary. The upper region 91 is smooth over the entire circumference, but a large number of recesses 93 are formed in the lower region 92 at equal intervals in the circumferential direction. Each recess 93 has a shape like a groove extending in the vertical direction, and its lower end is opened downward. The width W1 of the recess 93 and the interval W2 between the adjacent recesses 93 are substantially equal. However, the number of the recesses 78 is appropriately changed, and is changed in the range of about 4 to 360, preferably in the range of 10 to 120. Referring to FIG. 7, the bottom surface of the recess 93 has an arcuate cross section. The depth of the recess 93 is preferably not less than 1/4 of the width W1 of the recess 93.
[0031]
The lift 14 is moved up and down by the operation of the first fluid pressure cylinder 32, and the seal head 16 is moved up and down with respect to the lift 14 by the operation of the second fluid pressure cylinder 36.
[0032]
As shown in FIG. 1, the lower surface of the lid presser 17 and the lower surface of the lid adsorbing member 74 in the state where the lifting body 14 is positioned at the upper limit of the lifting stroke and the seal head 16 is positioned at the upper limit of the lifting stroke. The level of the blade 51 of the cutter 15 is higher than this level.
[0033]
In this state, the piston rod of the first fluid pressure cylinder 32 is positioned at the retracted end, and the piston rod of the second fluid pressure cylinder 36 is positioned at the protruding end. At this time, the air supply to the second fluid pressure cylinder 36 is stopped, and when the piston rod is pressed upward, the piston rod can be retracted freely.
[0034]
Next, the container sealing operation will be described with reference to FIGS. 5 and 6.
[0035]
FIG. 5 (a) shows the same state as FIG. As shown in FIG. 5 (b), the elevating body 14 is lowered to a position where the lid member presser 17 and the lid adsorbing member 74 are in contact with the lid member F, respectively.
[0036]
Next, when the elevating body 14 is lowered, as shown in FIG. 5 (c), the second compression coil spring 84 is compressed, so that the cover material retainer 17 keeps the cover material F pressed by the spring force. 15 is brought into contact with the lid member F. At the same time, the drag force of the cover material F overcomes the weight of the seal head 16 and the like, and the piston rod of the second fluid pressure cylinder 36 is retracted, so that the seal head 16 rises relative to the lifting body 14. Be made.
[0037]
Further, as shown in FIG. 6 (d), the elevating body 14 is lowered, and the cutter 15 punches the lid material F while the elevating body 14 is lowered to the lower limit, whereby the lid L is obtained. When the lid L is punched, the spring force of the second compression coil spring 84 is applied to the lid member F from the outside, and the gravity of the seal head 16 and the like is applied to the lid 15 from the outside. As a result, the displacement of the punching place is prevented, and the cutting performance of the cutter 15 is improved. The punched lid L is adsorbed by the lid adsorbing member 74.
[0038]
When the elevating body 14 is lowered to the lower limit, as shown in FIG. 6 (e), air is supplied to the second fluid pressure cylinder 36 to project the piston rod, and the seal head 16 is lowered. Then, the sealing member 62 enters the container body wall B while the lid adsorbing member 74 adsorbs the lid L. At this time, the outer peripheral portion including the knob T of the lid L forms a rising edge portion R. The seal pressing surface 72 of the seal member 62 that has entered the container body wall B is pressed against the seal receiving surface 22 of the container holder 11 via the container body wall B and the rising edge R. Thereby, the heat sealing of the container body wall B and the rising edge R is performed.
[0039]
In heat sealing, the seal pressing surface 72 is tapered downward, while the seal receiving surface 22 is vertical. Accordingly, a uniform seal pressure is not generated between the seal pressing surface 72 and the seal receiving surface 22, but a seal pressure that gradually decreases from the top to the bottom of both surfaces 72, 22 is generated. For this reason, the portion having a higher sealing pressure is more strongly sealed, and the sealing performance is improved.
[0040]
Further, the portion sealed by the upper region 91 of the seal member 62 is uniformly sealed over the entire circumference. On the other hand, as for the part sealed by the lower region 92, only the part without the recess 93 is sealed. As shown in FIG. 7, the slack of the peripheral edge of the lid at this time becomes 皺 M in the recess 93, but the 皺 M is not sealed.
[0041]
Further, during sealing, air is exhausted through the recess 93 from between the sealing surface of the container and the lower surface of the peripheral edge of the lid.
[0042]
Thereafter, the seal head 16 is raised together with the elevating body 14. First, as shown in FIG. 6 (f), the seal head 16 is raised first. At this time, even if the container C is to be lifted together with the seal head 16, the container presser 52 prevents this. Thereafter, the elevating body 14 is raised.
[0043]
In the above example, the container is conveyed by the turntable. However, the container may be conveyed by a conveyor.
[0044]
Further, in the above, an example in which the recess is formed only in the lower region is shown, but other examples are not excluded. The recess may be formed so as to extend over one or both of the upper region and the lower region, or both regions. However, considering the air venting function, the shape of the ridge, the sealing performance, the appearance of the product, etc., it is preferable that there is a recess only in the lower region.
[0045]
【The invention's effect】
According to the present invention, it is possible to eliminate a sealing failure and improve the appearance of the sealing surface.
[Brief description of the drawings]
FIG. 1 is a vertical cross-sectional view of a sealing device according to the present invention.
FIG. 2 is a horizontal cross-sectional view taken along line II-II in FIG.
FIG. 3 is an enlarged cross-sectional view around a seal head.
FIG. 4 is a detailed explanatory view of a seal head.
FIG. 5 is an explanatory view of a sealing operation by the sealing device.
6 is an explanatory diagram of a sealing operation subsequent to FIG. 5. FIG.
FIG. 7 is an explanatory diagram of a seal state.
FIG. 8 is a perspective view of a container sealed by the sealing device.
[Explanation of symbols]
14 Lifting body
15 cutter
16 Seal head
72 Seal holding surface
91 Upper area
92 Lower area
93 Recess L Lid F Lid

Claims (4)

容器の下細りテーパ状胴壁内面に蓋の周縁部をシールするシールヘッドを備えており、シールヘッドに、同胴壁内面と合致するシール押え面が形成されている容器密封装置において、シール押え面の周方向複数か所に、シール時における蓋周縁部の弛みを案内しうる凹所が形成されており、
シール押え面に上部領域および下部領域が形成され、凹所が、下部領域に位置させられており、
凹所の下端が、下方に開放されている容器密封装置。In a container sealing device comprising a seal head for sealing a peripheral edge of a lid on an inner surface of a tapered wall of a tapered wall of a container, and a seal presser surface that matches the inner surface of the shell wall is formed on the seal head. In several places in the circumferential direction of the surface, there are formed recesses that can guide the slack of the peripheral edge of the lid at the time of sealing ,
An upper region and a lower region are formed on the seal pressing surface, and a recess is located in the lower region,
A container sealing device in which the lower end of the recess is opened downward . 凹所が、上下方向にのびた溝の形態をなし、隣り合う凹所同士の間隔が一定である請求項１に記載の容器密封装置。The container sealing device according to claim 1 , wherein the recesses are in the form of a groove extending in the vertical direction, and the interval between adjacent recesses is constant. 凹所の幅と、隣り合う凹所同士の間隔とがほぼ一致させられている請求項２に記載の容器密封装置。The container sealing device according to claim 2 , wherein the width of the recess and the interval between adjacent recesses are substantially matched. 容器を保持するホルダを備えており、ホルダに容器挿入孔が形成され、容器挿入孔の周面上端部に、シール押え面と対応するシール受け面が形成され、シール受け面の内径が、全長にわたって一定でありかつ容器胴壁上端部の外径と等しくなされている請求項１〜３のいずれか１つに記載の容器密封装置。A holder for holding the container is provided, a container insertion hole is formed in the holder, a seal receiving surface corresponding to the seal pressing surface is formed at the upper end of the peripheral surface of the container insertion hole, and the inner diameter of the seal receiving surface is The container sealing device according to any one of claims 1 to 3 , wherein the container sealing device is constant over the outer diameter and is equal to the outer diameter of the upper end portion of the container body wall.
JP2003113173A 2003-04-17 2003-04-17 Container sealing device Expired - Fee Related JP4352166B2 (en)

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JP2003113173A JP4352166B2 (en) 2003-04-17 2003-04-17 Container sealing device
US10/709,095 US20040206048A1 (en) 2003-04-17 2004-04-13 Apparatus for sealing containers

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