JP2004330622A - Sealing device - Google Patents

Sealing device Download PDF

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Publication number
JP2004330622A
JP2004330622A JP2003129850A JP2003129850A JP2004330622A JP 2004330622 A JP2004330622 A JP 2004330622A JP 2003129850 A JP2003129850 A JP 2003129850A JP 2003129850 A JP2003129850 A JP 2003129850A JP 2004330622 A JP2004330622 A JP 2004330622A
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JP
Japan
Prior art keywords
drum
sheet
anvil
horn
sealing device
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.)
Granted
Application number
JP2003129850A
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Japanese (ja)
Other versions
JP4216637B2 (en
Inventor
Masaki Nakakado
正毅 中門
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.)
Zuiko Corp
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Zuiko Corp
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Publication date
Application filed by Zuiko Corp filed Critical Zuiko Corp
Priority to JP2003129850A priority Critical patent/JP4216637B2/en
Publication of JP2004330622A publication Critical patent/JP2004330622A/en
Application granted granted Critical
Publication of JP4216637B2 publication Critical patent/JP4216637B2/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—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
    • B29C66/816—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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—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 mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • 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
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
    • 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
    • B29C65/743—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 the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7443—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 the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc by means of 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
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—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
    • 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
    • B29C66/81433—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 being toothed, i.e. comprising several teeth or pins, or being patterned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81463—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B29C66/81465—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint one placed behind the other in a single row in the feed direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • 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
    • B29C66/8324—Joining or pressing tools pivoting around 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • 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
    • B29C66/81417—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 being V-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91441—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time
    • B29C66/91443—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time following a temperature-time profile
    • B29C66/91445—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time following a temperature-time profile by steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/4871—Underwear
    • B29L2031/4878—Diapers, napkins

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To increase the conveyance speed of a sheet-like material by setting two or more horns of an ultrasonic welder and to control the cost increase of a sealing device. <P>SOLUTION: In the sealing device 1, after the sheet-like material is received on a drum 20, ultrasonic vibration is applied to the material to seal the material, and the sealed material is released. An anvil 21 which is rotated with the drum 20 is fitted to the drum 20, and the horns 11 for applying ultrasonic vibration are arranged outside in the diameter direction of the drum 20. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、重ね合わせたシート状物をシールするシール装置に関するものである。
【０００２】
【従来の技術】
着用物品の一部を融着してシールする装置としては、下記の特許文献１，２が知られている。下記特許文献１では、ホーンおよびアンビルが各々、回転部に複数設けられている。下記特許文献２では、複数のアンビルを備えたアンビルロールの外方にホーンが１つ設けられている。
【０００３】
【特許文献１】
特開２００２−３５５２７０号公報（段落００５１、図２）
【０００４】
【特許文献２】
特開２００１−１５１２０８号公報（フロントページ）
【０００５】
【発明が解決しようとする課題】
しかし、前記特許文献１，２には、回転部の外周囲に複数の回転しないホーンを設けることは開示されていない。
複数のホーンを回転させると、超音波ウェルダも同時に回転させる必要があり、シール装置のコストアップを招く。
一方、複数のホーンを設けることにより、シールに必要な時間を稼ぐことができ、シート状物の搬送速度を大きくすることができる。
【０００６】
したがって、本発明の目的は、超音波ウェルダのホーンを複数個設けてシート状物の搬送速度を大きくすると共に、シール装置のコストアップを抑制することである。
【０００７】
【課題を解決するための手段】
前記目的を達成するために、本発明のあるシール装置は、シート状物をドラム上に受け取った後に、当該シート状物を超音波振動を印加することでシール加工し、該シール加工したシート状物を手放すシール装置において、前記ドラムに該ドラムと共に回転するアンビルが設けられ、前記ドラムの径方向の外方に超音波振動を印加するホーンが複数個配置されている。
【０００８】
シート状物がドラムと共に回転すると、アンビル上のシート状物は、複数のホーンに、順次、近接し加熱される。こうして、複数のホーンにより同一箇所についてのシール加工を行うので、シールに必要な時間を稼ぐことができるから、シート状物の搬送速度を大きくすることができる。
【０００９】
ドラムには、シート状物を保持するパッドを設け、このパッドにアンビルを設けてもよい。パッドおよびアンビルの数は一つでも複数個でもよい。
【００１０】
本発明において、パッドによるシートの保持手段としては、エアによる吸着の他に、針で保持したり、アームで押さえて保持するものであってもよい。
【００１１】
本発明においては、シール装置は所定の軌跡に沿って回転する複数のパッドを有し、前記複数のパッドがそれぞれ速度を変えながら回転可能であってもよい。
【００１２】
本発明においては、シート状物は互いに重ね合わされた複数枚のシートを含む中間品であり、前記シール装置は、前記中間品を物品ごとに区画するために前記シート同士を互いに接着してもよい。
本発明により生成される最終製品としては、使い捨てパンツ、オムツや生理用品などの使い捨て着用物品であってもよい。
【００１３】
本発明の好ましい実施形態においては、前記ホーンの上流側の近傍には回転可能な第１ローラが設けられ、この第１ローラは前記アンビルの上流の部分との間において前記シート状物のコア部を押し潰してもよい。
【００１４】
超音波振動によるエネルギーがシート状物に付加される際には、ホーンとアンビルとの間にシート状物が挟持されて複数枚のシートが熱融着される。そのため、ホーンとアンビルとの間は、数μｍ〜数１０μｍ程度の隙間となるようにするのが好ましい。一方、シート状物のコア部は吸収体を含んでいるから、コア部は厚い上、その厚さにはバラツキが生じ易いので、コア部がホーンに衝突するのを積極的に防止するのが好ましい。ここで、前記好適な実施形態では、前記第１ローラがコア部を押し潰すことにより、コア部の厚さを抑制することができるから、コア部がホーンに衝突するのを防止し得る。
【００１５】
本発明においては、前記アンビルは前記ドラムの内方に向って移動可能に前記ドラムに設けられ、前記ホーンの下流側の近傍には回転可能な第２ローラが設けられ、前記シート状物のコア部が前記アンビルの上に載っている場合には、前記一対のローラが前記アンビルを前記ドラムの内方に押して移動してもよい。
【００１６】
前述のように、ホーンとアンビルとはドラムの回転中に近接するが、一対のローラがアンビルを中心方向に押して移動させることにより、コア部がアンビル上に載っていても、コア部がホーンに衝突するのを防止し得る。
【００１７】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づいて説明する。
図１は第１実施形態を示す。
図１に示すように、本シール装置１は、連続したシート状物Ｗを搬送しながら、図５のシート状物Ｗのシール対象部位Ｗｓに超音波振動を与えて当該シール対象部位Ｗｓを熱融着させるものである。シート状物Ｗは、たとえば互いに重ね合わされた複数枚のシートを含む中間品であってもよい。なお、図５に示すように、中間品Ｗは前記シール対象部位Ｗｓである接着領域において、シート同士が互いに接着（シール）された後、切断線ＣＬ において切断されて個々の製品（パンツやオムツ）となる。
【００１８】
図１に示すように、着用物品の製造設備では、シール装置１にシート状物Ｗを導入する導入ロール２と、シール装置１によりシールされたシート状物Ｗをシール装置１から導出する導出ロール３と、該導出ロール３からシート状物Ｗを受け取るコンベヤ４とを備えていてもよい。
【００１９】
シール装置１は、複数の超音波ウエルダ１０とドラム２０とを備えている。各超音波ウエルダ１０は、ドラム２０の径方向の外方に等角度ピッチαで設けられていてもよい。前記超音波ウエルダ１０は、各々、超音波発生手段（図示せず）およびホーン１１を備えている。
【００２０】
前記ドラム２０には、複数のアンビル２１が等角度ピッチβで取り付けられていてもよい。前記ホーン１１のピッチαとアンビル２１のピッチβとは同一であってもよく、あるいは、互いに異なっていてもよい。
【００２１】
前記ホーン１１とアンビル２１を同一のピッチ（α＝β）で設けると、複数の超音波ウエルダ１０の作動を同一のタイミングに設定すればよいから、制御が簡単になる。
【００２２】
一方、前記ホーン１１とアンビル２１を互いに異なる適度なピッチとすると、前記各アンビル２１のうち１つのアンビル２１が前記超音波ウェルダ１０のホーン１１のうちの１つに近接対向している際には、他のアンビル２１が超音波ウェルダのホーン１１に近接対向していないことにより、前記各超音波ウェルダが同時にシールを行わないようにすることで、共振の発生を防止し得る。
【００２３】
ドラム２０はシート状物Ｗを保持しながらアンビル２１と共に回転し、シート状物Ｗを導入ロール２から導出ロール３の間を搬送する。前記アンビル２１は、回転中に、上流のホーン１１から下流のホーン１１に順次近接する。各アンビル２１が各ホーン１１に近接したときに、ホーン１１から超音波振動によるエネルギーがシート状物Ｗのシール対象部位Ｗｓに付与されて加熱される。したがって、各シール対象部位Ｗｓには、それぞれ、複数のホーン１１からエネルギーが付与されるので、シート状物Ｗの搬送速度が大きくてもシール加工を行うことができる。
【００２４】
なお、超音波によるエネルギーを付与する時期（タイミング）の制御は、つまり、超音波発生手段の作動制御は、ドラム２０の位相をロータリーエンコーダなどの回転検出器で検出し、その検出出力に基づいて行ってもよい。
【００２５】
超音波ホーン１１としは、たとえば、特表平１０−５１３１２８号に記載の超音波ホーンを用いてもよい。シート状物Ｗのシール対象部位Ｗｓは、前記ホーン１１によって加熱される。図４（ａ）に示すように、ホーン１１の表面１１ａには、たとえば、凸状のシールパターン１２が形成されていてもよい。
なお、図４（ｂ）に示すように、ホーン１１の表面１１ａにカッタ１３を設け、前記接着と同時に切断を行うようにしてもよい。なお、カッタ１３を設けた場合、切断する瞬間にホーン１１がドラム２０の径方向の中心に向って移動してもよい。
また、ホーン１１の表面１１ａにシールパターン１２を形成する代わりに、アンビル２１の表面にシールパターンを形成してもよい。
【００２６】
ドラム２０は所定の軌跡に沿って回転する複数のパッドに前記アンビル２１を備えていてもよい。前記各パッドは、所定の軸心のまわりに回転し、それぞれ周速度を変化させながら、パッド間の間隔を変化させるリピッチ機能を備えていてもよい。かかるリピッチ機能を実現させる装置としては、特開昭６３−３１７５７６号公報や特開２０００−３４５８８９号公報に開示されている。
各パッドはシート状物Ｗの受取時に吸引孔によりシート状物Ｗを吸引し、シート状物Ｗの受渡時には、吸引孔からの吸引を停止すると共に、該吸引孔からエアを吹き出すようにしてもよい。
【００２７】
図２は超音波ウエルダ１０およびパッド２２の一例を示す。
前記パッド２２には、シート状物Ｗを負圧で吸着する吸引孔が設けられていてもよい。前記パッド２２にはアンビル２１が一体に設けられていてもよい。前記アンビル２１は、ドラム２０の径方向の外方に向って突出しており、図２（ｃ）に示すように、ホーン１１に対向した際に、ホーン１１に近接する。前記パッド２２におけるアンビル２１の上流側部分２３および下流側部分２４は、シート状物Ｗのコア部Ｃを配置可能となるように、前記アンビル２１の表面よりもドラム２０の内方に退避している。
超音波ウエルダ１０のホーン１１の上流側近傍には第１ローラ３１が設けられており、ホーン１１の下流側近傍には第２ローラ３２が設けられていてもよい。両ローラ３１，３２は、回転自在なフリーローラであってもよい。
【００２８】
前記両ローラ３１，３２は、コア部Ｃがホーン１１に衝突しないように、コア部Ｃの表面に接触してコア部Ｃをパッド２２に押し付ける。かかる衝突防止の機能を十分に発揮させるために、両ローラ３１，３２の表面からドラム２０の回転中心Ｏ（図１）までの距離は、ホーン１１の表面からドラム２０の回転中心Ｏまでの距離と等しいか、あるいは、短く設定されていてもよい。
図２に示すように、アンビル２１の上にコア部Ｃが載っていない正常な状態においては、第２ローラ３２を設けていなくても、第１ローラ３１が前記機能を発揮する。
【００２９】
図２に示すように、シート状物Ｗが所定の状態でドラム２０上に載っている場合は、アンビル２１上にシール対象部位Ｗｓが吸着され、一方、アンビル２１の両側の部分２３，２４にコア部Ｃが吸着される。パッド２２がホーン１１の内側に接近すると、前記第１ローラ３１が上流側部分２３上のコア部Ｃを押し潰し、コア部Ｃの高さを低くする。これにより、図２（ａ），（ｂ）のように、上流側のコア部Ｃおよびシール対象部位Ｗｓがホーン１１に衝突することなくホーン１１の内方に近接した状態で、シート状物Ｗが搬送される。
【００３０】
図２（ｃ）のようにシール対象部位Ｗｓがホーン１１に近接すると、ホーン１１から超音波エネルギーがシール対象部位Ｗｓに印加され、シール対象部位Ｗｓが加熱されて、シール対象部位Ｗｓのシート同士が互いに熱融着される。更に、パッド２２が回転すると、前記第１ローラ３１が下流側部分２４上のコア部Ｃを押し潰し、コア部Ｃの高さを低くする。これにより、下流側のコア部Ｃがホーン１１に衝突することなく、シート状物Ｗが搬送される。
【００３１】
図２に示すように、前記パッド２２は、伸縮部２６を介してドラム２０に取り付けられていることで、アンビル２１がドラム２０の概ね径方向の内方に向って移動可能となっていてもよい。
【００３２】
また、図３に示すように、前記パッド２２の上流端部または下流端部は、ドラム２０に対しヒンジ２５を介して回転可能に取り付けられていてもよい。一方、前記パッド２２における前記ヒンジ２５と反対側の端部は、伸縮部２６を介してドラム２０に取り付けられていてもよい。このように、パッド２２がドラム２０に取り付けられていることにより、アンビル２１はドラム２０の概ね径方向の内方に向って移動可能となっている。
【００３３】
前記伸縮部２６としては、機械的なバネ（コイルスプリングや板バネ）でもよく、あるいは、エアダンパであってもよい。なお、パッド２２がドラム２０の外方に必要以上に突出しないようにするための規制手段を設けてもよい。
【００３４】
図３に示すようにシート状物Ｗが所定の状態でドラム２０上に載っていない場合、つまり、アンビル２１上にコア部Ｃが吸着されて搬送される場合がある。この場合、コア部Ｃが径方向に大きく突出する。この状態でパッド２２がホーン１１に接近すると、図３（ａ），（ｂ）に示すように、第１ローラ３１が上流側部分２３上のコア部Ｃを押し潰し、続いて第１ローラ３１がアンビル２１上のコア部Ｃをドラム２０の中心に向って押す。これにより、伸縮部２６が縮んでパッド２２はヒンジ２５を中心に若干回動し、パッド２２の上流側部分２３およびアンビル２１がドラム２０の概ね中心Ｏに向ってホーン１１から衝突しないように移動する。
【００３５】
前記アンビル２１がホーン１１の内方を通過し、更に、ドラム２０が回転すると、図３（ｃ）に示すように、シート状物Ｗの表面が第１ローラ３１に接触しない状態となり、代わりに、第２ローラ３２がアンビル２１上のコア部Ｃに接触し、前記アンビル２１がドラム２０の内方に移動した退避状態が維持される。
このように、コア部Ｃがアンビル２１に載っていても、２つのローラ３１，３２を設けることにより、コア部Ｃがホーン１１に衝突するのを防止できる。
【００３６】
なお、前記アンビル２１上のコア部Ｃが第２ローラ３２に接触しない位置までドラム２０が回転すると、伸縮部２６の復帰力によりパッド２２が図３（ａ）のように、ヒンジ２５を中心に外方に向って回転し元の位置に復帰する。
【００３７】
かかる衝突防止の第２機能を十分に発揮させるためには、図３（ｂ）の一対のローラ３１，３２間の距離Ｄをホーン１１の周方向の長さＬに等しいか、あるいは、長さＬよりも小さく設定してもよい。
【００３８】
以上のとおり、図面を参照しながら好適な実施形態を説明したが、当業者であれば、本明細書を見て、自明な範囲で種々の変更および修正を容易に想定するであろう。
たとえば、いわゆる横流れまたは縦流れの着用物品にシール加工を施してもよい。また、製品ごとの大きさに切断されたシート状物の一部をシールしてもよい。
したがって、そのような変更および修正は、請求の範囲から定まる本発明の範囲内のものと解釈される。
【００３９】
【発明の効果】
以上説明したように、本発明によれば、複数のホーンによりシール加工を行うので、シールに必要な時間を稼ぐことができるから、シート状物の搬送速度を大きくすることができる。
また、複数のホーンがドラムの外周に設けられており、回転させる必要がないので、シール装置のコストダウンを図ることができる。
【図面の簡単な説明】
【図１】本発明の製造設備の一実施形態を示す側面図である。
【図２】超音波ウェルダおよびパッドの一例を示す一部断面した部分側面図である。
【図３】同他の例を示す部分側面図である。
【図４】ホーンの形状の一例を示す斜視図である。
【図５】着用物品の一例を示す平面図である。
【符号の説明】
１：シール装置
１０：超音波ウエルダ
１１：ホーン
２０：ドラム
２２：パッド
２３：上流側部分
３１：第１ローラ
３２：第２ローラ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sealing device for sealing stacked sheets.
[0002]
[Prior art]
The following Patent Documents 1 and 2 are known as devices for fusing and sealing a part of a worn article. In the following Patent Document 1, a plurality of horns and anvils are respectively provided in the rotating part. In the following Patent Document 2, one horn is provided outside an anvil roll having a plurality of anvils.
[0003]
[Patent Document 1]
JP 2002-355270 A (paragraph 0051, FIG. 2)
[0004]
[Patent Document 2]
JP 2001-151208 A (front page)
[0005]
[Problems to be solved by the invention]
However, Patent Documents 1 and 2 do not disclose providing a plurality of non-rotating horns on the outer periphery of the rotating portion.
When a plurality of horns are rotated, it is necessary to rotate the ultrasonic welder at the same time, which increases the cost of the sealing device.
On the other hand, by providing a plurality of horns, the time required for sealing can be gained, and the conveying speed of the sheet can be increased.
[0006]
Therefore, an object of the present invention is to provide a plurality of ultrasonic welder horns to increase the conveying speed of the sheet-like material and to suppress an increase in the cost of the sealing device.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a sealing device according to the present invention, after receiving a sheet-like material on a drum, seals the sheet-like material by applying ultrasonic vibrations, and the sealed sheet-like material. In the sealing device for releasing an object, the drum is provided with an anvil that rotates together with the drum, and a plurality of horns that apply ultrasonic vibrations are arranged outward in the radial direction of the drum.
[0008]
When the sheet-like object rotates together with the drum, the sheet-like object on the anvil is sequentially approached and heated by the plurality of horns. In this way, since the sealing process is performed on the same portion with a plurality of horns, the time required for the sealing can be gained, so that the conveying speed of the sheet-like material can be increased.
[0009]
The drum may be provided with a pad for holding a sheet-like material, and an anvil may be provided on the pad. The number of pads and anvils may be one or more.
[0010]
In the present invention, the sheet holding means by the pad may be held by a needle or pressed by an arm in addition to suction by air.
[0011]
In the present invention, the sealing device may have a plurality of pads that rotate along a predetermined locus, and each of the plurality of pads may be rotatable while changing a speed.
[0012]
In the present invention, the sheet-like material is an intermediate product including a plurality of sheets superposed on each other, and the sealing device may adhere the sheets to each other in order to partition the intermediate product into articles. .
The final product produced by the present invention may be disposable wearing articles such as disposable pants, diapers and sanitary products.
[0013]
In a preferred embodiment of the present invention, a rotatable first roller is provided in the vicinity of the upstream side of the horn, and the first roller is located between the upstream portion of the anvil and the core portion of the sheet-like material. May be crushed.
[0014]
When energy by ultrasonic vibration is added to the sheet-like object, the sheet-like object is sandwiched between the horn and the anvil, and a plurality of sheets are heat-sealed. Therefore, it is preferable that a gap of about several μm to several tens of μm be provided between the horn and the anvil. On the other hand, since the core portion of the sheet-like material includes the absorber, the core portion is thick and the thickness is likely to vary. Therefore, it is possible to positively prevent the core portion from colliding with the horn. preferable. Here, in the preferred embodiment, since the thickness of the core portion can be suppressed by the first roller crushing the core portion, the core portion can be prevented from colliding with the horn.
[0015]
In the present invention, the anvil is provided in the drum so as to be movable inward of the drum, and a rotatable second roller is provided in the vicinity of the downstream side of the horn. When the portion is placed on the anvil, the pair of rollers may move by pushing the anvil inward of the drum.
[0016]
As described above, the horn and the anvil are close to each other during the rotation of the drum, but the pair of rollers pushes and moves the anvil in the center direction so that the core portion is placed on the horn even if the core portion is placed on the anvil. Collisions can be prevented.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a first embodiment.
As shown in FIG. 1, the present sealing device 1 heats the sealing target portion Ws by applying ultrasonic vibration to the sealing target portion Ws of the sheet-like material W in FIG. 5 while conveying the continuous sheet-like material W. It is to be fused. The sheet-like object W may be an intermediate product including, for example, a plurality of sheets stacked on each other. As shown in FIG. 5, the intermediate product W is bonded area is the sealing target portion Ws, after the sheet to each other are bonded (sealed) to one another, are cut at the cut line C L Ya individual products (pants Diaper).
[0018]
As shown in FIG. 1, in a wearing article manufacturing facility, an introduction roll 2 that introduces a sheet-like object W into the sealing device 1, and a lead-out roll that derives the sheet-like object W sealed by the sealing device 1 from the sealing device 1 3 and a conveyor 4 that receives the sheet-like material W from the outlet roll 3 may be provided.
[0019]
The sealing device 1 includes a plurality of ultrasonic welders 10 and a drum 20. Each ultrasonic welder 10 may be provided at an equiangular pitch α outside the drum 20 in the radial direction. Each of the ultrasonic welders 10 includes ultrasonic generation means (not shown) and a horn 11.
[0020]
A plurality of anvils 21 may be attached to the drum 20 at an equiangular pitch β. The pitch α of the horn 11 and the pitch β of the anvil 21 may be the same or different from each other.
[0021]
If the horn 11 and the anvil 21 are provided at the same pitch (α = β), the operation of the plurality of ultrasonic welders 10 may be set at the same timing, so that the control becomes simple.
[0022]
On the other hand, when the horn 11 and the anvil 21 are set to appropriate pitches different from each other, when one of the anvils 21 is in close proximity to one of the horns 11 of the ultrasonic welder 10, Since the other anvils 21 are not in close proximity to the horn 11 of the ultrasonic welder, the ultrasonic welders are prevented from simultaneously sealing, thereby preventing the occurrence of resonance.
[0023]
The drum 20 rotates together with the anvil 21 while holding the sheet-like object W, and conveys the sheet-like object W from the introduction roll 2 to the outlet roll 3. The anvil 21 sequentially approaches the upstream horn 11 and the downstream horn 11 during rotation. When each anvil 21 comes close to each horn 11, energy by ultrasonic vibration is applied from the horn 11 to the site to be sealed Ws of the sheet W and heated. Accordingly, energy is applied to each sealing target portion Ws from the plurality of horns 11, so that the sealing process can be performed even when the conveyance speed of the sheet-like object W is high.
[0024]
The control of the timing (timing) of applying energy by ultrasonic waves, that is, the operation control of the ultrasonic wave generation means, detects the phase of the drum 20 with a rotation detector such as a rotary encoder and based on the detection output. You may go.
[0025]
As the ultrasonic horn 11, for example, an ultrasonic horn described in JP-T-10-513128 may be used. The sealing target portion Ws of the sheet-like object W is heated by the horn 11. As shown in FIG. 4A, for example, a convex seal pattern 12 may be formed on the surface 11 a of the horn 11.
In addition, as shown in FIG.4 (b), the cutter 13 may be provided in the surface 11a of the horn 11, and you may make it cut | disconnect simultaneously with the said adhesion | attachment. When the cutter 13 is provided, the horn 11 may move toward the radial center of the drum 20 at the moment of cutting.
Further, instead of forming the seal pattern 12 on the surface 11 a of the horn 11, a seal pattern may be formed on the surface of the anvil 21.
[0026]
The drum 20 may include the anvil 21 on a plurality of pads that rotate along a predetermined locus. Each of the pads may be provided with a re-pitch function that rotates around a predetermined axis and changes the spacing between the pads while changing the peripheral speed. An apparatus for realizing such a re-pitch function is disclosed in Japanese Patent Laid-Open Nos. 63-317576 and 2000-345889.
Each pad sucks the sheet-like material W through the suction hole when the sheet-like material W is received, and when the sheet-like material W is delivered, the suction from the suction hole is stopped and air is blown out from the suction hole. Good.
[0027]
FIG. 2 shows an example of the ultrasonic welder 10 and the pad 22.
The pad 22 may be provided with a suction hole for adsorbing the sheet-like object W at a negative pressure. An anvil 21 may be provided integrally with the pad 22. The anvil 21 protrudes outward in the radial direction of the drum 20, and approaches the horn 11 when facing the horn 11 as shown in FIG. The upstream portion 23 and the downstream portion 24 of the anvil 21 in the pad 22 are retracted inward of the drum 20 from the surface of the anvil 21 so that the core portion C of the sheet-like object W can be disposed. Yes.
A first roller 31 may be provided near the upstream side of the horn 11 of the ultrasonic welder 10, and a second roller 32 may be provided near the downstream side of the horn 11. Both rollers 31 and 32 may be rotatable free rollers.
[0028]
The rollers 31 and 32 are in contact with the surface of the core portion C and press the core portion C against the pad 22 so that the core portion C does not collide with the horn 11. In order to sufficiently exhibit such a collision prevention function, the distance from the surfaces of the rollers 31 and 32 to the rotation center O (FIG. 1) of the drum 20 is the distance from the surface of the horn 11 to the rotation center O of the drum 20. It may be set equal to or short.
As shown in FIG. 2, in a normal state where the core portion C is not placed on the anvil 21, the first roller 31 exhibits the function even if the second roller 32 is not provided.
[0029]
As shown in FIG. 2, when the sheet-like object W is placed on the drum 20 in a predetermined state, the seal target portion Ws is adsorbed on the anvil 21, while the portions 23 and 24 on both sides of the anvil 21 are adsorbed. The core part C is adsorbed. When the pad 22 approaches the inside of the horn 11, the first roller 31 crushes the core portion C on the upstream side portion 23 and lowers the height of the core portion C. As a result, as shown in FIGS. 2A and 2B, the sheet-like object W in a state where the upstream core portion C and the sealing target portion Ws are close to the inside of the horn 11 without colliding with the horn 11. Is transported.
[0030]
When the seal target part Ws approaches the horn 11 as shown in FIG. 2C, ultrasonic energy is applied from the horn 11 to the seal target part Ws, the seal target part Ws is heated, and the sheets of the seal target part Ws are heated. Are heat-sealed to each other. Further, when the pad 22 rotates, the first roller 31 crushes the core portion C on the downstream side portion 24 and lowers the height of the core portion C. Thereby, the sheet-like object W is conveyed, without the downstream core part C colliding with the horn 11. FIG.
[0031]
As shown in FIG. 2, the pad 22 is attached to the drum 20 via the expansion / contraction part 26, so that the anvil 21 can move substantially inward in the radial direction of the drum 20. Good.
[0032]
As shown in FIG. 3, the upstream end portion or the downstream end portion of the pad 22 may be attached to the drum 20 via a hinge 25 so as to be rotatable. On the other hand, the end of the pad 22 on the side opposite to the hinge 25 may be attached to the drum 20 via the extendable part 26. In this way, the pad 22 is attached to the drum 20, so that the anvil 21 can move inward in the generally radial direction of the drum 20.
[0033]
The expansion / contraction part 26 may be a mechanical spring (coil spring or leaf spring) or an air damper. In addition, you may provide the control means for preventing the pad 22 from projecting outside the drum 20 more than necessary.
[0034]
As shown in FIG. 3, there is a case where the sheet-like object W is not placed on the drum 20 in a predetermined state, that is, the core part C is adsorbed and conveyed on the anvil 21. In this case, the core part C protrudes greatly in the radial direction. When the pad 22 approaches the horn 11 in this state, as shown in FIGS. 3A and 3B, the first roller 31 crushes the core portion C on the upstream portion 23, and then the first roller 31. Pushes the core C on the anvil 21 toward the center of the drum 20. As a result, the expansion / contraction part 26 contracts, and the pad 22 slightly rotates around the hinge 25, and the upstream portion 23 of the pad 22 and the anvil 21 move toward the center O of the drum 20 so as not to collide with the horn 11. To do.
[0035]
When the anvil 21 passes through the inside of the horn 11 and the drum 20 further rotates, the surface of the sheet-like object W is not in contact with the first roller 31 as shown in FIG. The retracted state in which the second roller 32 contacts the core portion C on the anvil 21 and the anvil 21 has moved inward of the drum 20 is maintained.
Thus, even if the core part C is placed on the anvil 21, the core part C can be prevented from colliding with the horn 11 by providing the two rollers 31 and 32.
[0036]
When the drum 20 rotates to a position where the core portion C on the anvil 21 does not contact the second roller 32, the pad 22 is centered on the hinge 25 as shown in FIG. Rotate outward and return to its original position.
[0037]
In order to sufficiently exhibit the second function of preventing the collision, the distance D between the pair of rollers 31 and 32 in FIG. 3B is equal to the circumferential length L of the horn 11 or the length You may set smaller than L.
[0038]
As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification.
For example, a so-called transverse flow or longitudinal flow wearing article may be sealed. Moreover, you may seal a part of sheet-like material cut | disconnected by the magnitude | size for every product.
Accordingly, such changes and modifications are to be construed as within the scope of the present invention as defined by the claims.
[0039]
【The invention's effect】
As described above, according to the present invention, since the sealing process is performed by a plurality of horns, it is possible to increase the time required for the sealing, and therefore it is possible to increase the conveying speed of the sheet-like material.
Further, since a plurality of horns are provided on the outer periphery of the drum and do not need to be rotated, the cost of the sealing device can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a production facility of the present invention.
FIG. 2 is a partial cross-sectional side view showing an example of an ultrasonic welder and a pad.
FIG. 3 is a partial side view showing another example.
FIG. 4 is a perspective view showing an example of the shape of a horn.
FIG. 5 is a plan view showing an example of a worn article.
[Explanation of symbols]
1: Sealing device 10: Ultrasonic welder 11: Horn 20: Drum 22: Pad 23: Upstream portion 31: First roller 32: Second roller

Claims (3)

シート状物をドラム上に受け取った後に、当該シート状物に超音波振動を印加することでシール加工し、該シール加工したシート状物を手放すシール装置において、
前記ドラムに該ドラムと共に回転するアンビルが設けられ、
前記ドラムの径方向の外方に超音波振動を印加するホーンが複数個配置されたシール装置。After receiving the sheet-like material on the drum, sealing is performed by applying ultrasonic vibration to the sheet-like material, and in the sealing device for releasing the sealed sheet-like material,
An anvil that rotates with the drum is provided on the drum;
A sealing device in which a plurality of horns for applying ultrasonic vibration are arranged outward in the radial direction of the drum. 請求項１において、
前記ホーンの上流側の近傍には回転可能な第１ローラが設けられ、この第１ローラは前記アンビルの上流の部分との間において前記シート状物のコア部を押し潰すことを特徴とするシール装置。In claim 1,
A rotatable first roller is provided in the vicinity of the upstream side of the horn, and the first roller crushes the core portion of the sheet-like material between the upstream portion of the anvil. apparatus. 請求項２において、
前記アンビルは前記ドラムの内方に向って移動可能に前記ドラムに取り付けられており、
前記ホーンの下流側の近傍には回転可能な第２ローラが設けられ、
前記シート状物のコア部が前記アンビルの上に載っている場合には、前記一対のローラが前記コア部を介して前記アンビルを前記ドラムの内方に押して移動させるようにしたシール装置。In claim 2,
The anvil is attached to the drum so as to be movable inward of the drum;
A rotatable second roller is provided in the vicinity of the downstream side of the horn,
When the core part of the sheet-like material is placed on the anvil, the pair of rollers pushes the anvil inward of the drum through the core part to move the sealing apparatus.
JP2003129850A 2003-05-08 2003-05-08 Wearing device sealing device Expired - Fee Related JP4216637B2 (en)

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