JP2012120775A - Ultrasonic bonding device, bonding method for web using the same, and method for producing pants-type wearing article using the same - Google Patents

Ultrasonic bonding device, bonding method for web using the same, and method for producing pants-type wearing article using the same Download PDF

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Publication number
JP2012120775A
JP2012120775A JP2010275614A JP2010275614A JP2012120775A JP 2012120775 A JP2012120775 A JP 2012120775A JP 2010275614 A JP2010275614 A JP 2010275614A JP 2010275614 A JP2010275614 A JP 2010275614A JP 2012120775 A JP2012120775 A JP 2012120775A
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Japan
Prior art keywords
pattern block
horn
ridge pattern
ultrasonic
web
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JP2010275614A
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Japanese (ja)
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JP5728214B2 (en
Inventor
Junichi Yamashita
潤一 山下
Kenji Kobayashi
賢司 小林
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Kao Corp
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Kao Corp
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Publication of JP2012120775A publication Critical patent/JP2012120775A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • 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
    • B29C66/344—Stretching or tensioning the joint area during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/345—Progressively making the joint, e.g. starting from the middle
    • 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
    • B29C66/40—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
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/472—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—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
    • B29C66/81425—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 stepped, e.g. comprising a shoulder
    • 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
    • B29C66/8141—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
    • B29C66/81435—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 comprising several parallel ridges, e.g. for crimping
    • 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
    • B29C66/40—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
    • B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B29C66/7294—Non woven mats, e.g. felt
    • 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
    • B29C66/83415—Roller, cylinder or drum types the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle
    • 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
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/951—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools
    • B29C66/9513—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools characterised by specific vibration frequency values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/951—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools
    • B29C66/9517—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools characterised by specific vibration amplitude values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/4871—Underwear
    • B29L2031/4878—Diapers, napkins

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

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic bonding device which increases bonding strength of an object to be bonded compared to conventional devices.SOLUTION: A ultrasonic device 10 is provided which includes a receiving section having a projection pattern block 31 and an ultrasonic vibration section 20 having a horn 21. The object to be bonded is welded by heat generated by friction due to ultrasonic vibration of the horn 21, while moving the projection pattern block 31 and the object to be bonded in the direction intersecting the vibration direction of the horn 21, with an object to be bonded interposed between the projection pattern block 31 and the horn 21. The projection pattern block 31 extends in the direction perpendicular to its moving direction. The shape of the horn 21 is such that the area of the horn 21 facing the projection pattern block 31 changes in accordance with the movement of the projection pattern block 31 along the extending direction of the projection pattern block 31.

Description

本発明は、超音波接合装置に関する。また本発明は、該接合装置を用いたウエブの接合方法及びパンツ型着用物品の製造方法に関する。   The present invention relates to an ultrasonic bonding apparatus. The present invention also relates to a method for joining a web using the joining device and a method for producing a pants-type wearing article.

パンツ型使い捨ておむつやパンツ型生理用ショーツ等のパンツ型着用物品は、一般に股下部と、そこから前後に延びる腹側部及び背側部を有している。腹側部の左右両側部と背側部の左右両側部とは互いに接合されており、物品の縦方向に延びるサイドシール部が形成されている。サイドシール部の形成によって、着用物品には、一対のレッグ開口部及びウエスト開口部が形成される。着用物品を脱ぐ場合には、サイドシール部を縦方向に向けて引き裂いて腹側部と背側部とを離間させる。したがってサイドシール部は、着用物品の着用中における引き裂きが起こらない程度に高い接合強度と、着用物品を脱ぐときに引き裂きを行いやすい程度に低い接合強度とが要求される。またサイドシール部は、着用物品の着用中に着用者の肌と接触しやすい部位なので、風合いが良好であることも要求される。   A pants-type wearing article such as a pants-type disposable diaper or a pants-type sanitary shorts generally has a crotch portion and a ventral portion and a dorsal portion extending forward and backward from the crotch portion. The left and right side portions of the ventral side portion and the left and right side portions of the back side portion are joined to each other, and a side seal portion extending in the longitudinal direction of the article is formed. Due to the formation of the side seal portion, a pair of leg openings and a waist opening are formed in the wearing article. When taking off the wearing article, the side seal portion is torn in the vertical direction to separate the ventral portion from the back portion. Therefore, the side seal portion is required to have a high bonding strength that does not cause tearing during wearing of the worn article and a low bonding strength that facilitates tearing when the worn article is removed. Moreover, since a side seal part is a site | part which is easy to contact a wearer's skin during the wearing of a wear article, it is also requested | required that a texture should be favorable.

パンツ型着用物品のサイドシール部の形成に関しては、例えば特許文献１に記載の技術が知られている。同文献においては、超音波ホーン４２とアンビルドラム４３とを有する超音波融着装置４０を用いてサイドシール部を形成している。アンビルドラム４３の周面には、該ドラム４３の軸５０に関して傾いたアンビル４４が配置されている。一方、超音波ホーン４２は、ドラム４３の軸５０と平行に配置されている。超音波ホーン４２とアンビル４４とをこのような位置関係で配置することで、両者を平行な位置関係で配置した場合に比べて押圧面積が小さくなり、ホーン４２及び融着装置４０を小型化できると、同文献には記載されている。   Regarding the formation of the side seal part of the pants-type wearing article, for example, a technique described in Patent Document 1 is known. In this document, the side seal portion is formed using an ultrasonic fusion device 40 having an ultrasonic horn 42 and an anvil drum 43. An anvil 44 inclined with respect to the shaft 50 of the drum 43 is disposed on the peripheral surface of the anvil drum 43. On the other hand, the ultrasonic horn 42 is arranged in parallel with the shaft 50 of the drum 43. By arranging the ultrasonic horn 42 and the anvil 44 in such a positional relationship, the pressing area becomes smaller than when both are arranged in a parallel positional relationship, and the horn 42 and the fusion device 40 can be downsized. And the same document.

特許文献２にも、特許文献１と同様の構成を有する超音波シール装置が記載されている。このシール装置においては、アンビル１６を有する回転体１５の表面に、シールパターン１７ａ，１７ｂが設けられている。シールパターン１７ａ，１７ｂは、回転体１５の中心線Ｏ３に対して傾斜している。一方、超音波ホーン４８のシール対向面４８ａは、前記の中心線Ｏ３と平行になっている。   Patent Document 2 also describes an ultrasonic sealing device having the same configuration as Patent Document 1. In this sealing device, seal patterns 17 a and 17 b are provided on the surface of the rotating body 15 having the anvil 16. The seal patterns 17a and 17b are inclined with respect to the center line O3 of the rotating body 15. On the other hand, the seal facing surface 48a of the ultrasonic horn 48 is parallel to the center line O3.

特開平５−１５５５１号公報Japanese Patent Laid-Open No. 5-15551 特開２００４−２９８４１３号公報JP 2004-298413 A

特許文献１及び２に記載の装置を用いてパンツ型着用物品のサイドシール部を形成すると、アンビル４４（特許文献１）やシールパターン１７ａ，１７ｂ（特許文献２）が傾斜していることに起因して、サイドシール部は着用物品の縦方向に対して傾斜する方向に形成されてしまう。サイドシール部が着用物品の縦方向に対して傾斜する方向に形成されていると、着用者の肌と接触する接触線が小さくなり(つまり部分的に接触するようになり)、弾性体等による着用者への締め付け応力が集中してしまい、着用者に不快感を与えてしまう。   When the side seal part of the pants-type wearing article is formed using the devices described in Patent Documents 1 and 2, the anvil 44 (Patent Document 1) and the seal patterns 17a and 17b (Patent Document 2) are inclined. And a side seal part will be formed in the direction which inclines with respect to the longitudinal direction of a wearing article. When the side seal part is formed in a direction inclined with respect to the longitudinal direction of the wearing article, the contact line that comes into contact with the wearer's skin becomes small (that is, comes into partial contact), and due to the elastic body, etc. The tightening stress on the wearer is concentrated, which causes discomfort to the wearer.

したがって本発明の課題は、前述した従来技術が有する欠点を解消し得る超音波接合装置及びそれを用いたシール方法や使い捨て着用物品の製造方法を提供することにある。   Therefore, the subject of this invention is providing the ultrasonic bonding apparatus which can eliminate the fault which the prior art mentioned above has, the sealing method using the same, and the manufacturing method of disposable wearing articles.

本発明は、突条パターンブロックを有する受け部と、ホーンを有する超音波振動部とを備え、該突条パターンブロックと該ホーンとの間に接合対象物を介在させた状態下に、該突条パターンブロック及び該接合対象物を、該ホーンの振動方向と交差する方向に移動させつつ、該ホーンの超音波振動による摩擦で発生した熱によって該接合対象物を溶着させる超音波接合装置であって、
該突条パターンブロックは、その移動方向と直交する方向に延びており、
該ホーンは、その形状が、該突条パターンブロックの移動に伴い、該突条パターンブロックと該ホーンとの対向面積が、該突条パターンブロックの延びる方向に沿って変化するような形状となっている超音波接合装置を提供するものである。 The present invention comprises a receiving part having a ridge pattern block and an ultrasonic vibration part having a horn, and the protrusion is provided under the condition that an object to be joined is interposed between the ridge pattern block and the horn. An ultrasonic bonding apparatus that welds the object to be welded by heat generated by friction caused by ultrasonic vibration of the horn while moving the strip pattern block and the object to be welded in a direction crossing the vibration direction of the horn. And
The ridge pattern block extends in a direction perpendicular to the moving direction,
The shape of the horn is such that the opposing area of the ridge pattern block and the horn changes along the extending direction of the ridge pattern block as the ridge pattern block moves. An ultrasonic bonding apparatus is provided.

また本発明は、同方向に移動する第１ウエブ及び第２ウエブを重ね合わせ、重ね合わされた状態の両ウエブを、超音波接合装置を用いて超音波接合して、該ウエブの移動方向と直交する方向に延びる接合線を形成するウエブの接合方法であって、
該超音波接合装置として、移動方向と直交する方向に延び、かつ該移動方向と同方向に移動する突条パターンブロックを有する受け部と、該突条パターンブロックに対向して配置され、かつホーンを有する超音波振動部とを備え、
該ホーンは、その形状が、該突条パターンブロックの移動に伴い、該突条パターンブロックと該ホーンとの対向面積が、該突条パターンブロックの延びる方向に沿って変化するような形状となっている超音波接合装置を用いるウエブの接合方法を提供するものである。 In the present invention, the first web and the second web that move in the same direction are overlapped, and the two webs in an overlapped state are ultrasonically bonded using an ultrasonic bonding apparatus, and orthogonal to the moving direction of the web. A web joining method for forming a joining line extending in the direction of stretching,
As the ultrasonic bonding apparatus, a receiving portion having a ridge pattern block extending in a direction orthogonal to the movement direction and moving in the same direction as the movement direction, a horn arranged opposite to the ridge pattern block, and a horn An ultrasonic vibration part having
The shape of the horn is such that the opposing area of the ridge pattern block and the horn changes along the extending direction of the ridge pattern block as the ridge pattern block moves. The present invention provides a web joining method using an ultrasonic joining apparatus.

更に本発明は、股下部並びに該股下部から前後に延出する腹側部及び背側部を有し、該腹側部と該背側部とがそれらの両側部において接合されてサイドシール部を形成しているパンツ型着用物品の製造方法において、
前記着用物品を前記サイドシール部において開き、平面に展開した状態の展開体が、おむつ幅方向に連なって構成されている長尺のおむつ中間体を一方向に走行させ、
走行する前記おむつ中間体を、その走行方向に沿って二つ折りして腹側部予定部と背側部予定部とを対向させ、
対向状態の腹側部予定部と背側部予定部とを、超音波接合装置を用い、接合予定部において超音波接合して一対の前記サイドシール部を所定の間隔をおいて順次形成し、
一対の前記サイドシール部間において前記おむつ中間体を、その走行方向と直交する方向に沿って順次裁断する工程を有し、
前記超音波接合装置として、移動方向と直交する方向に延び、かつ該移動方向と同方向に移動する突条パターンブロックを有する受け部と、該突条パターンブロックに対向して配置され、かつホーンを有する超音波振動部とを備え、
該ホーンは、その形状が、該突条パターンブロックの移動に伴い、該突条パターンブロックと該ホーンとの対向面積が、該突条パターンブロックの延びる方向に沿って変化するような形状となっている超音波接合装置を用いるパンツ型着用物品の製造方法を提供するものである。 Furthermore, the present invention has a crotch part and a ventral part and a dorsal part extending forward and backward from the crotch part, and the abdominal part and the dorsal part are joined to each other on both sides thereof to form a side seal part. In the manufacturing method of the pants-type wearing article forming
The wearing article is opened in the side seal part, and the unfolded body in a state of being unfolded in a plane travels in one direction through a long diaper intermediate configured to be continuous in the diaper width direction,
The diaper intermediate that travels is folded in two along the traveling direction so that the abdomen side planned portion and the back side planned portion are opposed to each other,
Using the ultrasonic bonding apparatus, the abdominal side planned portion and the back side planned portion in the opposed state are ultrasonically bonded in the planned bonding portion to sequentially form the pair of side seal portions at a predetermined interval,
A step of sequentially cutting the diaper intermediate body between the pair of side seal portions along a direction orthogonal to the traveling direction;
As the ultrasonic bonding apparatus, a receiving portion having a ridge pattern block extending in a direction orthogonal to the movement direction and moving in the same direction as the movement direction, a horn disposed opposite to the ridge pattern block, and a horn An ultrasonic vibration part having
The shape of the horn is such that the opposing area of the ridge pattern block and the horn changes along the extending direction of the ridge pattern block as the ridge pattern block moves. The manufacturing method of the pants | underpants type wearing article using the ultrasonic bonding apparatus currently provided is provided.

本発明の超音波接合装置によれば、超音波ホーンとパターンブロックを平行に配置した場合に比べて、超音波ホーンがパターンブロックを押圧する面積が小さくなる。そのことに起因して加圧力が高くなり、超音波ホーンとパターンブロックとを平行に配置した場合に比べて接合強度を高めることができる。   According to the ultrasonic bonding apparatus of the present invention, the area where the ultrasonic horn presses the pattern block is smaller than when the ultrasonic horn and the pattern block are arranged in parallel. As a result, the applied pressure is increased, and the bonding strength can be increased as compared with the case where the ultrasonic horn and the pattern block are arranged in parallel.

図１は、本発明の超音波接合装置の外観を示す模式図である。FIG. 1 is a schematic view showing the appearance of the ultrasonic bonding apparatus of the present invention. 図２は、図１に示す超音波接合装置の要部を示す斜視図である。FIG. 2 is a perspective view showing a main part of the ultrasonic bonding apparatus shown in FIG. 図３（ａ）ないし（ｃ）は、超音波接合を行っている間における超音波ホーンとアンビルロールとの位置関係を平面視して示す図である。FIGS. 3A to 3C are diagrams showing the positional relationship between the ultrasonic horn and the anvil roll in a plan view while performing ultrasonic bonding. 図４は、本発明の超音波接合装置におけるパターンブロックの他の例を示す模式図である。FIG. 4 is a schematic view showing another example of a pattern block in the ultrasonic bonding apparatus of the present invention. 図５は、本発明の超音波接合装置を用いたパンツ型使い捨ておむつの製造工程を模式的に示す斜視図である。FIG. 5: is a perspective view which shows typically the manufacturing process of the underpants type disposable diaper using the ultrasonic bonding apparatus of this invention. 図６は、図５に示す製造工程で製造されたパンツ型使い捨ておむつの中間品連続体を模式的に示す平面図である。FIG. 6 is a plan view schematically showing an intermediate product continuum of the pants-type disposable diaper manufactured in the manufacturing process shown in FIG. 図７は、図５に示す製造工程で用いられる超音波接合装置におけるパターンブロックを示す模式図である。FIG. 7 is a schematic diagram showing a pattern block in the ultrasonic bonding apparatus used in the manufacturing process shown in FIG. 図８は、パターンブロック及び超音波ホーンの別の実施形態を示す図（図３相当図）である。FIG. 8 is a diagram (corresponding to FIG. 3) showing another embodiment of the pattern block and the ultrasonic horn.

以下本発明を、その好ましい実施形態に基づき図面を参照しながら説明する。図１には、本発明の超音波接合装置の外観が模式的に示されている。同図に示す装置１０は、主たる部位として超音波振動部２０とアンビルロール３０とを備えている。超音波振動部２０とアンビルロール３０との間には、接合対象物である２枚のウエブ４１，４２が介在配置される。ウエブ４１，４２は繰り出しロール（図示せず）から繰り出された長尺帯状のものである。接合装置１０は、両ウエブ４１，４２に超音波振動を与え、その摩擦によって生じる熱で両ウエブ４１，４２を溶融させて溶着する。   The present invention will be described below based on preferred embodiments with reference to the drawings. FIG. 1 schematically shows the appearance of the ultrasonic bonding apparatus of the present invention. The apparatus 10 shown in the figure includes an ultrasonic vibration unit 20 and an anvil roll 30 as main parts. Between the ultrasonic vibration unit 20 and the anvil roll 30, two webs 41 and 42, which are objects to be joined, are interposed. The webs 41 and 42 are in the form of long strips fed from a feed roll (not shown). The joining apparatus 10 applies ultrasonic vibrations to both the webs 41 and 42 and melts and welds both the webs 41 and 42 with heat generated by the friction.

超音波振動部２０は、その横断面の形状が細長い矩形をした超音波ホーン２１を有している。この矩形の長辺の延びる方向は、アンビルロール３０の回転方向と略直交する方向である。超音波ホーン２１は、その上部においてブースター２２と接続されている。ブースター２２は、その上部において振動子２３と接続されている。振動子２３は、超音波発信機（図示せず）に電気的に接続されている。ブースター２２は、振動子２３によって生じた超音波振動を増幅させるためのものである。ブースター２２によって増幅された超音波振動は、超音波ホーン２１によって更に増幅される。   The ultrasonic vibration unit 20 includes an ultrasonic horn 21 whose cross-sectional shape is an elongated rectangular shape. The extending direction of the long side of the rectangle is a direction substantially orthogonal to the rotation direction of the anvil roll 30. The ultrasonic horn 21 is connected to the booster 22 at the upper part thereof. The booster 22 is connected to the vibrator 23 at the upper part thereof. The vibrator 23 is electrically connected to an ultrasonic transmitter (not shown). The booster 22 is for amplifying the ultrasonic vibration generated by the vibrator 23. The ultrasonic vibration amplified by the booster 22 is further amplified by the ultrasonic horn 21.

超音波ホーン２１の振動数や振幅等の運転条件は、接合対象物である２枚のウエブ４１，４２の材質や厚み等に応じて適切に設定することができる。接合装置１０を、例えば後述するパンツ型おむつの製造に用いる場合の運転条件としては、振動数２０〜４０ｋＨｚ、振幅１０〜１００μｍとすることができる。   The operating conditions such as the frequency and amplitude of the ultrasonic horn 21 can be appropriately set according to the material and thickness of the two webs 41 and 42 which are the objects to be joined. As operating conditions in the case where the joining apparatus 10 is used for manufacturing, for example, a pant-type diaper described later, a frequency of 20 to 40 kHz and an amplitude of 10 to 100 μm can be set.

アンビルロール３０は、その周面３０ａにパターンブロック３１を有している。パターンブロック３１は、アンビルロール３０の本体に対して着脱可能になっている別部材であってもよく、あるいは削り出しによって形成され、アンビルロール３０の本体と一体になっていてもよい。   The anvil roll 30 has a pattern block 31 on its peripheral surface 30a. The pattern block 31 may be a separate member that can be attached to and detached from the main body of the anvil roll 30, or may be formed by cutting and integrated with the main body of the anvil roll 30.

アンビルロール３０は、パターンブロック３１と、パターンブロック３１以外の部位、すなわちアンビルロール３０の周面３０ａとの間で高低差を有している。つまりパターンブロック３１はアンビルロール３０の周面３０ａから突出している。パターンブロック３１は、アンビルロール３０のロール軸方向に延びており、突条をなしている。突条パターンブロック３１は、アンビルロール３０の周面３０ａに２カ所設けられている。２つの突条パターンブロック３１は、アンビルロール３０の中心を挟んで１８０度対称な位置に設けられている。尤も、パターンブロック３１を設ける数や、パターンブロック３１を配置する位置は、これに限られない。２つのパターンブロック３１は同形をしているが、接合対象物によっては、各パターンブロックの形状を異ならせてもよい。パターンブロック３１の延びる方向は、アンビルロール３０のロール軸と平行になっている。パターンブロック３１の上面は、微小な凹凸形状になっているか（後述する図２参照）又は平坦になっている。   The anvil roll 30 has a height difference between the pattern block 31 and a portion other than the pattern block 31, that is, the peripheral surface 30 a of the anvil roll 30. That is, the pattern block 31 protrudes from the peripheral surface 30 a of the anvil roll 30. The pattern block 31 extends in the roll axis direction of the anvil roll 30 and forms a protrusion. Two protrusion pattern blocks 31 are provided on the peripheral surface 30 a of the anvil roll 30. The two ridge pattern blocks 31 are provided at positions 180 degrees symmetrical with respect to the center of the anvil roll 30. However, the number of the pattern blocks 31 provided and the positions where the pattern blocks 31 are arranged are not limited to this. Although the two pattern blocks 31 have the same shape, the shape of each pattern block may be different depending on the object to be joined. The extending direction of the pattern block 31 is parallel to the roll axis of the anvil roll 30. The upper surface of the pattern block 31 has a minute uneven shape (see FIG. 2 described later) or is flat.

先に述べた超音波振動部２０の超音波ホーン２１は、アンビルロール３０の周面３０ａに対向して配置されている。この場合、超音波ホーン２１の幅方向（図１中、紙面と直交する方向）は、アンビルロール３０のロール軸方向を向いている。ただし、超音波ホーン２１の幅方向は、アンビルロール３０のロール軸方向と平行になっていない（このことについては後述する）。   The ultrasonic horn 21 of the ultrasonic vibration unit 20 described above is disposed to face the peripheral surface 30 a of the anvil roll 30. In this case, the width direction of the ultrasonic horn 21 (the direction orthogonal to the paper surface in FIG. 1) faces the roll axis direction of the anvil roll 30. However, the width direction of the ultrasonic horn 21 is not parallel to the roll axis direction of the anvil roll 30 (this will be described later).

超音波振動部２０とアンビルロール３０とは、超音波ホーン２１における下面とパターンブロック３１の上面との間に、所定のクリアランスが生じるような位置関係で配置されている。   The ultrasonic vibration unit 20 and the anvil roll 30 are arranged in a positional relationship such that a predetermined clearance is generated between the lower surface of the ultrasonic horn 21 and the upper surface of the pattern block 31.

アンビルロール３０は、図１中、矢印で示す方向に回転している。これに対して超音波振動部２０は、アンビルロール３０の回転方向ないし接線方向に対しては固定状態になっている。尤も超音波振動部２０は、その超音波ホーン２１が、アンビルロール３０の法線方向に往復運動（振動）する。   The anvil roll 30 rotates in the direction indicated by the arrow in FIG. On the other hand, the ultrasonic vibration part 20 is in a fixed state with respect to the rotation direction or tangential direction of the anvil roll 30. However, in the ultrasonic vibration unit 20, the ultrasonic horn 21 reciprocates (vibrates) in the normal direction of the anvil roll 30.

図２は、図１に示す超音波接合装置１０の要部を示す斜視図である。同図に示すように、アンビルロール３０においては、そのパターンブロック３１は、ロール軸方向Ｄと平行に設けられている。これに対して、超音波ホーン２１は、その幅方向Ｗが、パターンブロック３１の延びる方向、すなわちアンビルロール３０のロール軸方向Ｄに対してやや傾斜するように配置されている。このように超音波ホーン２１はパターンブロック３１に対して傾斜しており、両者が所定の角度をもって交差した状態で接合が行われる。しかし両者は直交していない。つまり、超音波ホーン２１とパターンブロック３１とは０度超９０度未満の角度でもって交差している。   FIG. 2 is a perspective view showing a main part of the ultrasonic bonding apparatus 10 shown in FIG. As shown in the figure, in the anvil roll 30, the pattern block 31 is provided in parallel with the roll axis direction D. On the other hand, the ultrasonic horn 21 is arranged such that the width direction W thereof is slightly inclined with respect to the direction in which the pattern block 31 extends, that is, the roll axis direction D of the anvil roll 30. As described above, the ultrasonic horn 21 is inclined with respect to the pattern block 31, and the joining is performed in a state where the two intersect each other at a predetermined angle. However, they are not orthogonal. That is, the ultrasonic horn 21 and the pattern block 31 intersect at an angle of more than 0 degree and less than 90 degrees.

図３（ａ）ないし（ｃ）は、超音波接合が進行している間における超音波ホーン２１とパターンブロック３１との位置関係を平面視したものである。同図においては、接合対象物である第１ウエブ及び第２ウエブの図示を省略してある。同図に示すように、図中、矢印Ｒで示す方向に移動するパターンブロック３１の軸線Ｄに対して、超音波ホーン２１はその幅方向Ｗが所定角度θでもって傾斜している。したがって図３（ａ）ないし（ｃ）に順次示すように、パターンブロック３１の移動が進むに連れて、超音波ホーン２１はパターンブロック３１に対して角度θを維持した状態で重なる。その結果、パターンブロック３１の移動に伴い、該パターンブロック３１と超音波ホーン２１との対向面積が、該パターンブロック３１の延びる方向に沿って徐々に増加し、その後減少する。つまり、超音波ホーン２１とパターンブロック３１とを平行に配置した状態で超音波接合を行う場合に比べて、本実施形態によれば、第１ウエブ及び第２ウエブを介して超音波ホーン２１がパターンブロック３１を押圧する面積を小さくすることができる。ところで、超音波接合を行う場合に接合対象物に加わる溶着エネルギーは、振幅と押圧力と押圧時間との積に比例することが知られている。したがって、振幅及び押圧時間が同じ条件であれば、押圧力が高いほど溶着エネルギーを大きくすることができる。すなわち超音波ホーン２１の溶着エネルギーが分散することなく接合対象物である第１ウエブ及び第２ウエブに加わる。その結果、本実施形態によれば、超音波ホーン２１とパターンブロック３１とを平行に配置した状態で超音波接合を行う場合に比べて、両ウエブの接合強度を一層高くすることができる。   3A to 3C are plan views of the positional relationship between the ultrasonic horn 21 and the pattern block 31 while the ultrasonic bonding is in progress. In the figure, illustration of the first web and the second web, which are objects to be joined, is omitted. As shown in the figure, the ultrasonic horn 21 is inclined with a predetermined angle θ in the width direction W with respect to the axis D of the pattern block 31 moving in the direction indicated by the arrow R in the figure. Therefore, as shown in FIGS. 3A to 3C sequentially, the ultrasonic horn 21 overlaps the pattern block 31 while maintaining the angle θ as the movement of the pattern block 31 proceeds. As a result, as the pattern block 31 moves, the facing area between the pattern block 31 and the ultrasonic horn 21 gradually increases along the direction in which the pattern block 31 extends, and then decreases. That is, compared with the case where ultrasonic bonding is performed in a state where the ultrasonic horn 21 and the pattern block 31 are arranged in parallel, according to the present embodiment, the ultrasonic horn 21 is interposed via the first web and the second web. The area where the pattern block 31 is pressed can be reduced. By the way, it is known that the welding energy applied to the objects to be joined when performing ultrasonic joining is proportional to the product of amplitude, pressing force, and pressing time. Therefore, if the amplitude and the pressing time are the same, the welding energy can be increased as the pressing force is higher. That is, the welding energy of the ultrasonic horn 21 is applied to the first and second webs that are the objects to be joined without being dispersed. As a result, according to the present embodiment, the bonding strength of both webs can be further increased as compared with the case where ultrasonic bonding is performed in a state where the ultrasonic horn 21 and the pattern block 31 are arranged in parallel.

また本実施形態によれば、パターンブロック３１の延びる方向は、両ウエブ４１，４２の走行方向と直交しているので、背景技術の項で述べた特許文献１及び２に記載の技術と異なり、接合によって形成される接合線を、両ウエブ４１，４２の長手方向と直交するように形成することができる。   In addition, according to the present embodiment, the extending direction of the pattern block 31 is orthogonal to the traveling direction of the both webs 41 and 42, and therefore, unlike the techniques described in Patent Documents 1 and 2 described in the background section, A joining line formed by joining can be formed so as to be orthogonal to the longitudinal direction of both webs 41 and 42.

以上のとおり、本実施形態によれば、超音波ホーン２１を、その延びる方向がパターンブロック３１の延びる方向に対して傾斜するように配置して、該パターンブロック３１の移動に伴い、該パターンブロック３１と超音波ホーン２１との対向面積が変化（すなわち次第に増加し、その後次第に減少）するようにしている。   As described above, according to the present embodiment, the ultrasonic horn 21 is disposed so that the extending direction thereof is inclined with respect to the extending direction of the pattern block 31, and the pattern block 31 is moved along with the movement of the pattern block 31. The opposed area between the ultrasonic horn 21 and the ultrasonic horn 21 is changed (that is, gradually increases and then gradually decreases).

両ウエブの接合強度を一層高める観点から、超音波ホーン２１の幅方向Ｗとパターンブロック３１の延びる方向Ｄとがなす角度θは１〜４５度、特に１〜１０度とすることが好ましい。   From the viewpoint of further increasing the bonding strength between both webs, the angle θ formed by the width direction W of the ultrasonic horn 21 and the direction D in which the pattern block 31 extends is preferably 1 to 45 degrees, particularly 1 to 10 degrees.

超音波ホーン２１とパターンブロック３１とによる第１ウエブ及び第２ウエブの接合を確実に行う観点から、パターンブロック３１の長さをＬ１としたとき、パターンブロック３１の移動方向と交差する方向の超音波ホーン２１の長さＬ２は、Ｌ１／ｃｏｓθ以上であることが好ましい（θは、超音波ホーン２１の幅方向Ｗとパターンブロック３１の延びる方向Ｄとがなす角度を表す。）。つまり、超音波ホーン２１は、パターンブロック３１の移動方向と直交する方向の長さが、溶着によって形成された接合線の長さと同じか又はそれよりも長くなっている。   From the viewpoint of surely joining the first web and the second web by the ultrasonic horn 21 and the pattern block 31, when the length of the pattern block 31 is L 1, the super direction in the direction intersecting the moving direction of the pattern block 31 is The length L2 of the sonic horn 21 is preferably not less than L1 / cos θ (θ represents the angle formed by the width direction W of the ultrasonic horn 21 and the extending direction D of the pattern block 31). That is, the length of the ultrasonic horn 21 in the direction orthogonal to the moving direction of the pattern block 31 is the same as or longer than the length of the joining line formed by welding.

本実施形態の超音波接合装置１０を用いた接合方法においては、アンビルロール３０を回転させ、かつ超音波振動部２０を継続して動作させている状態下に、該超音波振動部２０とアンビルロールとの間に、第１ウエブ４１及び第２ウエブ４２を走行させる。両ウエブ４１，４２は、該超音波振動部２０の超音波ホーン２１とアンビルロール３０のパターンブロック３１との間に挟まれたときだけ、超音波接合される。したがって、両ウエブ４１，４２は、それらの走行方向に所定の間隔をおいて間欠的に接合される。なお、接合の間も第１ウエブ４１及び第２ウエブ４２は走行を続けている。両ウエブ４１，４２の溶着によって形成される接合パターンは、超音波ホーン２１とパターンブロック３１との接触した形状となる。   In the bonding method using the ultrasonic bonding apparatus 10 of the present embodiment, the ultrasonic vibration unit 20 and the anvil are rotated while the anvil roll 30 is rotated and the ultrasonic vibration unit 20 is continuously operated. The first web 41 and the second web 42 are run between the rolls. The webs 41 and 42 are ultrasonically bonded only when they are sandwiched between the ultrasonic horn 21 of the ultrasonic vibration unit 20 and the pattern block 31 of the anvil roll 30. Therefore, both the webs 41 and 42 are intermittently joined at a predetermined interval in their running direction. During the joining, the first web 41 and the second web 42 continue to run. The joining pattern formed by welding the webs 41 and 42 is a shape in which the ultrasonic horn 21 and the pattern block 31 are in contact with each other.

両ウエブ４１，４２の接合を確実する目的で、超音波接合装置１０による接合を行う前に、第１ウエブ４１及び第２のウエブ４２の少なくとも一方を予熱してもよい。予熱方法としては、例えばウエブへの熱風の吹き付けや赤外線の照射、加熱されたロールへのウエブの抱きつけ等を用いることができる。   In order to ensure the joining of both webs 41 and 42, at least one of the first web 41 and the second web 42 may be preheated before joining by the ultrasonic joining apparatus 10. As the preheating method, for example, blowing hot air on the web, irradiating with infrared rays, or holding the web on a heated roll can be used.

第１ウエブ４１及び／又は第２のウエブ４２の種類や、接合の目的によっては、アンビルロール３０のパターンブロック３１として、その延びる方向に沿う高さが異なるものを用いてもよい。例えば図４に示すように、パターンブロック３１が、ロール軸方向Ｄに関して、該パターンブロック３１の中央域３２の高さを、側部域３３よりも高くすることができる。パターンブロック３１をこのように構成することで、第１及び第２ウエブ４１，４２に対する押圧力を、パターンブロック３１の延びる方向において異ならせることができ、接合強度をコントロールすることができる。   Depending on the type of the first web 41 and / or the second web 42 and the purpose of joining, the pattern blocks 31 of the anvil roll 30 may have different heights along the extending direction. For example, as shown in FIG. 4, the height of the central area 32 of the pattern block 31 in the roll axis direction D can be made higher than that of the side area 33. By configuring the pattern block 31 in this way, the pressing force on the first and second webs 41 and 42 can be varied in the extending direction of the pattern block 31, and the bonding strength can be controlled.

本実施形態の超音波接合装置１０を用いて接合される対象物である第１ウエブ及び第２ウエブとしては、超音波振動による摩擦で発生する熱によって溶融する材料を含み、溶着が可能なものが用いられる。例えば各種の熱可塑性樹脂を含むフィルム、不織布、織布、編み地、それらの複合材などが挙げられる。第１ウエブ及び第２ウエブは、単層のものでもよく、あるいは多層のものでもよい。多層のウエブを用いる場合には、ウエブどうしの対向面に熱可塑性樹脂からなる材料が存在していればよく、それ以外の層は溶着可能な層でなくてもよい。本実施形態における第１ウエブ及び第２ウエブはいずれも長尺のものであるが、これに代えて毎葉のウエブを用いても差し支えない。   The first web and the second web, which are objects to be joined using the ultrasonic joining apparatus 10 of the present embodiment, include materials that melt by heat generated by friction caused by ultrasonic vibration and can be welded. Is used. Examples thereof include films containing various thermoplastic resins, nonwoven fabrics, woven fabrics, knitted fabrics, and composite materials thereof. The first web and the second web may be single-layered or multilayered. When a multilayer web is used, it is sufficient that a material made of a thermoplastic resin exists on the opposing surfaces of the webs, and other layers may not be weldable layers. The first web and the second web in this embodiment are both long, but instead of this, a leaf-by-leaf web may be used.

以上の説明は、本発明の接合装置を単層又は多層のウエブの接合に用いた場合のものであるが、本発明の接合装置はそれ以外の材料の接合に適用することもできる。そのような適用対象として、例えばパンツ型着用物品の製造における該物品の構成部材の接合が挙げられる。そこで以下に、パンツ型着用物品の一種であるパンツ型使い捨ておむつの製造に、本発明の接合装置を適用した例を説明する。   The above description is for the case where the bonding apparatus of the present invention is used for bonding a single layer or a multilayer web, but the bonding apparatus of the present invention can also be applied to bonding of other materials. As such an application object, joining of the structural member of this article | item in manufacture of an underpants type wearing article is mentioned, for example. Then, the example which applied the joining apparatus of this invention to manufacture of the underpants type disposable diaper which is a kind of underpants type wearing article below is demonstrated.

パンツ型使い捨ておむつは、一般に股下部並びに該股下部から前後に延出する腹側部及び背側部を有している。そして腹側部と背側部とがそれらの両側部において接合されてサイドシール部を形成している。サイドシール部の形成によって、着用物品には、一対のレッグ開口部及びウエスト開口部が形成される。図５には、そのようなパンツ型使い捨ておむつの製造工程が模式的に示されている。同図に示すおむつの製造工程は、いわゆる横流れ方式のものであり、前述した接合装置１０を用い、超音波振動部２０とアンビルロール３０との間に、シート状のおむつの連続体６０’（パンツ型使い捨ておむつの中間品連続体）を供給し、該連続体６０’にサイドシール部６４を形成する工程を具備している。   A pants-type disposable diaper generally has a crotch part and a ventral part and a dorsal part extending back and forth from the crotch part. And the abdominal side part and the back side part are joined in those both sides, and form the side seal part. Due to the formation of the side seal portion, a pair of leg openings and a waist opening are formed in the wearing article. FIG. 5 schematically shows a manufacturing process of such a pants-type disposable diaper. The manufacturing process of the diaper shown in the figure is a so-called cross-flow type, and using the joining device 10 described above, a sheet-like diaper continuum 60 ′ (between the ultrasonic vibrator 20 and the anvil roll 30 ( An intermediate product continuous body of pants-type disposable diapers), and a side seal portion 64 is formed on the continuous body 60 '.

詳細には、本実施態様のおむつの製造方法は、１）外包材６１の連続体の形成工程と、２）外包材６１の連続体に吸収性本体６２を配置する吸収性本体の配置工程と、３）外包材６１の連続体にレッグ開口部６３を形成するレッグ開口部形成工程と、４）外包材６１の連続体と吸収性本体６２の折り工程と、５）外包材６１及び吸収性本体６２が二つ折りにされてなるおむつの連続体（パンツ型使い捨ておむつの中間品連続物）６０’を長さ方向に所定間隔をおいて接合装置１０（図５には図示せず）によって接合して一対のサイドシール部６４を形成する工程と、６）連続体６０’を切断手段（図示せず）によってサイドシール部６４で切断して個々のおむつ６０に分離する分離工程とを具備している。   In detail, the manufacturing method of the diaper of this embodiment is 1) the formation process of the continuous body of the outer packaging material 61, and 2) the arrangement process of the absorbent main body which arranges the absorbent main body 62 in the continuous body of the outer packaging material 61. 3) Leg opening forming step for forming the leg opening 63 in the continuous body of the outer packaging material 61, 4) Folding process of the continuous body of the outer packaging material 61 and the absorbent main body 62, and 5) The outer packaging material 61 and the absorbent. A continuous body of diapers (intermediate product of underpants-type disposable diapers) 60 'in which the main body 62 is folded in two is joined by a joining device 10 (not shown in FIG. 5) at a predetermined interval in the length direction. A step of forming a pair of side seal portions 64, and 6) a separation step of cutting the continuum 60 ′ by the cutting means (not shown) at the side seal portions 64 and separating the diapers 60 into individual diapers 60. ing.

外包材６１の連続体の形成工程では、帯状の外層シート６１Ａと、肌側に配される帯状の内層シート６１Ｂとを接合して外包材６１の連続体を形成する。本実施態様においては、これらのシートどうしを接合するときに、ウエスト弾性部材６１Ｃ及びレッグ弾性部材６１Ｄもこれらのシートどうしの間に供給され、それらの間に伸長状態で接合される。具体的には、両シート６１Ａ，６１Ｂを重ね合わせる前に、両シートのいずれか一方又は双方の相対向する面の所定の部位に、ウエスト弾性部材６１Ｃ及びレッグ弾性部材６１Ｄを固定するための接着剤を塗工しておき、これらの弾性部材を伸長状態で挟んだ状態で両帯状シートをニップロールで挟圧する。ウエスト弾性部材６１Ｃは、おむつのウエスト部に位置するように外包材６１の両側部に供給されて接着剤で接合固定される。レッグ弾性部材６１Ｄは、後に形成されるレッグ開口部６３及び股下部分の形態に合わせて供給されて接着剤で接合固定される。レッグ弾性部材６１Ｄは、外層シート６１Ａ及び内層シート６１Ｂの流れ方向に直交する方向に公知の揺動ガイド（図示せず）で揺動されながら、両帯状シート６１Ａ，６１Ｂ間に導入される。また、両シート６１Ａ，６１Ｂは、ヒートシール加工等の各種シールや接着剤等の接合手段によって所定の部位で互いに接合される。   In the step of forming the continuous body of the outer packaging material 61, the belt-shaped outer layer sheet 61A and the belt-shaped inner layer sheet 61B arranged on the skin side are joined to form a continuous body of the outer packaging material 61. In the present embodiment, when these sheets are joined together, the waist elastic member 61C and the leg elastic member 61D are also supplied between these sheets and joined in an extended state between them. Specifically, before the two sheets 61A and 61B are overlapped, adhesion for fixing the waist elastic member 61C and the leg elastic member 61D to a predetermined part of one or both of the two sheets facing each other. An agent is applied in advance, and both belt-like sheets are clamped by nip rolls with these elastic members sandwiched in an expanded state. The waist elastic member 61C is supplied to both side portions of the outer packaging material 61 so as to be positioned at the waist portion of the diaper, and is bonded and fixed with an adhesive. The leg elastic member 61D is supplied in accordance with the shape of the leg opening 63 and the crotch part to be formed later, and is joined and fixed with an adhesive. The leg elastic member 61D is introduced between the belt-like sheets 61A and 61B while being swung by a known rocking guide (not shown) in a direction orthogonal to the flow direction of the outer layer sheet 61A and the inner layer sheet 61B. Moreover, both the sheets 61A and 61B are joined to each other at a predetermined site by joining means such as various seals such as heat seal processing or an adhesive.

吸収性本体６２の配置工程では、別途製造され、予めホットメルト接着剤等の接着剤が塗布された吸収性本体６２が、９０度回転され、外包材６１の連続体の内層シート６１Ｂ上に間欠的に供給されて固定される。吸収性本体６２は、液透過性の表面シート、液不透過性又は撥水性の裏面シート、及びこれら両シート間に介在配置された液保持性の吸収体を具備し、実質的に縦長の形態を有している。   In the arrangement process of the absorbent main body 62, the absorbent main body 62, which is separately manufactured and previously coated with an adhesive such as a hot melt adhesive, is rotated 90 degrees and intermittently placed on the inner layer sheet 61B of the continuous body of the outer packaging material 61. Supplied and fixed. The absorbent main body 62 includes a liquid-permeable top sheet, a liquid-impermeable or water-repellent back sheet, and a liquid-retaining absorbent disposed between the two sheets, and has a substantially vertically long form. have.

レッグ開口部形成工程では、吸収性本体６２が配置された外包材６１の連続体におけるレッグ弾性部材６１Ｄの環状部の内側にレッグ開口部６３が形成される。レッグ開口部６３の形成には、ロータリーカッター、レーザーカッター等の従来からこの種の物品の製造方法における手法と同様の手法が採用される。レッグ開口部の形成は、吸収性本体６２の配置前に行うこともできる。ここまでの工程で、パンツ型おむつをサイドシール部において開き、平面に展開した状態の展開体が、おむつ幅方向に連なって構成されている長尺のおむつ中間体が形成される。   In the leg opening forming step, the leg opening 63 is formed inside the annular portion of the leg elastic member 61D in the continuous body of the outer packaging material 61 in which the absorbent main body 62 is disposed. For the formation of the leg opening 63, a technique similar to the technique in the conventional manufacturing method of this type of article such as a rotary cutter or a laser cutter is employed. The leg opening can be formed before the absorbent main body 62 is arranged. Through the steps so far, the pant-type diaper is opened at the side seal portion, and a long diaper intermediate body is formed in which the unfolded body in a state of being unfolded in a plane is connected in the diaper width direction.

折り工程では、予めウエスト弾性部材６１Ｃ及び吸収性本体６２の長さ方向の両端部に折り重なるように、外包材６１の連続体の両側縁部が折り込まれた後、前記の長尺のおむつ中間体、すなわち外包材６１の連続体と吸収性本体６２とが、走行方向に沿って二つ折りにされる。これによって、目的とするパンツ型おむつにおける腹側部となるべき部位及び背側部となるべき部位である腹側部予定部と背側部予定部とが対向する。   In the folding step, both side edges of the continuous body of the outer packaging material 61 are folded in advance so as to be folded at both ends in the length direction of the waist elastic member 61C and the absorbent main body 62, and then the above-mentioned long diaper intermediate body That is, the continuous body of the outer packaging material 61 and the absorbent main body 62 are folded in two along the traveling direction. Thereby, the site | part which should become a ventral part and the site | part which should become a dorsal part in the target underpants type diaper opposes the ventral part plan part and the dorsal part plan part.

サイドシール部６４の形成工程では、対向状態の腹側部予定部と背側部予定部とを、超音波接合装置（図示せず）を用い、接合予定部において超音波接合して一対のサイドシール部６４を所定の間隔をおいて順次形成する。詳細には、図５に示すように、吸収性本体６２と共に二つ折りにされた外包材６１の連続体からなるおむつの連続体６０’が、超音波接合装置（図示せず）における超音波振動部２０とアンビルロールとの間に供給され、超音波ホーン２１とパターンブロック３１に挟まれて押圧されることで超音波接合が行われる。これによって、図６に示すように、おむつの連続体６０’の外包材６１（外層シート６１Ａ及び内層シート６１Ｂ）に、一対のサイドシール部６４が所定の間隔をおいて順次形成される。   In the step of forming the side seal portion 64, the abdomen side planned portion and the back side planned portion in the opposite state are ultrasonically bonded to each other at a planned bonding portion using an ultrasonic bonding apparatus (not shown). Seal portions 64 are sequentially formed at a predetermined interval. Specifically, as shown in FIG. 5, a diaper continuous body 60 ′ composed of a continuous body of an outer packaging material 61 folded together with an absorbent main body 62 is subjected to ultrasonic vibration in an ultrasonic bonding apparatus (not shown). Ultrasonic bonding is performed by being supplied between the unit 20 and the anvil roll and sandwiched between the ultrasonic horn 21 and the pattern block 31 and pressed. As a result, as shown in FIG. 6, a pair of side seal portions 64 are sequentially formed at predetermined intervals on the outer packaging material 61 (outer layer sheet 61A and inner layer sheet 61B) of the diaper continuous body 60 '.

一つのサイドシール部６４を形成するために、図５に示す製造方法に用いられる接合装置のアンビルロール３０は、そのパターンブロックとして図７に示すものを用いる。同図に示すパターンブロックは、第１パターンブロック３１ａと第２パターンブロック３１ｂの２つからなる。これらのパターンブロック３１ａ，３１ｂはいずれもロール軸方向Ｄに延び、並列配置されている。サイドシール部６４の形成においては、図７に示す超音波ホーン２１が２つのパターンブロック３１ａ，３１ｂ上を通過することで、これらのパターンブロック３１ａ，３１ｂに対応する一対のサイドシール部６４が形成される。この接合装置においても、パターンブロック３１ａ，３１ｂの移動に伴い、該パターンブロック３１ａ，３１ｂと超音波ホーン２１との対向面積が、該パターンブロック３１ａ，３１ｂの延びる方向に沿って変化する。   In order to form one side seal part 64, the anvil roll 30 of the joining apparatus used for the manufacturing method shown in FIG. 5 uses the pattern block shown in FIG. The pattern block shown in the figure is composed of two patterns, a first pattern block 31a and a second pattern block 31b. These pattern blocks 31a and 31b both extend in the roll axis direction D and are arranged in parallel. In forming the side seal portion 64, the ultrasonic horn 21 shown in FIG. 7 passes over the two pattern blocks 31a and 31b, thereby forming a pair of side seal portions 64 corresponding to the pattern blocks 31a and 31b. Is done. Also in this bonding apparatus, as the pattern blocks 31a and 31b move, the facing area between the pattern blocks 31a and 31b and the ultrasonic horn 21 changes along the extending direction of the pattern blocks 31a and 31b.

サイドシール部６４の形成においては、図７に示すロール軸方向Ｄの端部において、パターンブロック３１ａ，３１ｂと超音波ホーン２１とが線接触する長さが短く、その結果押圧力が大きくなるので、接合強度がサイドシール部６４の他の部分よりも高くなる。このような接合強度を実現できることは、パンツ型使い捨ておむつのサイドシール部として好ましいものである。   In the formation of the side seal portion 64, the length of the line contact between the pattern blocks 31a and 31b and the ultrasonic horn 21 at the end in the roll axis direction D shown in FIG. 7 is short, and as a result, the pressing force increases. The bonding strength is higher than that of the other portions of the side seal portion 64. Achieving such bonding strength is preferable as a side seal part of a pants-type disposable diaper.

なお、おむつの連続体６０’は、厚みが一様ではなく、吸収性本体６２が存在している部位の厚みが最も大きくなっている。したがって、前記の接合装置を用いたサイドシール部６４の形成においては、該形成を首尾良く行うために、おむつの連続体６０’がパターンブロック３１ａ，３１ｂと超音波ホーン２１との間に介在した状態において、厚みが最も大きくなっている部位である吸収性本体６２の部分の影響が生じないようにする必要がある。この目的のために、アンビルロール３０として、その周面におけるパターンブロック３１ａ，３１ｂ以外の部位に、凹部を有するものを用いることが有利である。こうすることで、該凹部に吸収性本体６２の部分を収容することができる。その結果、パターンブロック３１ａ，３１ｂと超音波ホーン２１との間のクリアランスが吸収性本体６２によって影響されなくなり、サイドシール部６４を首尾よく形成することができる。   The diaper continuous body 60 ′ is not uniform in thickness, and the thickness of the portion where the absorbent main body 62 exists is the largest. Therefore, in the formation of the side seal portion 64 using the joining device, the diaper continuum 60 ′ is interposed between the pattern blocks 31 a and 31 b and the ultrasonic horn 21 in order to perform the formation successfully. In the state, it is necessary to prevent the influence of the portion of the absorbent main body 62 that is the portion having the largest thickness. For this purpose, it is advantageous to use the anvil roll 30 having a recess in the peripheral surface other than the pattern blocks 31a and 31b. By carrying out like this, the part of the absorptive main body 62 can be accommodated in this recessed part. As a result, the clearance between the pattern blocks 31a and 31b and the ultrasonic horn 21 is not affected by the absorbent main body 62, and the side seal portion 64 can be successfully formed.

分離工程では、サイドシール部の形成工程において形成したおむつの連続体６０’が、一対のサイドシール部６４の間（図６中、符号Ｃで示す位置）で切断されて個々のおむつ６０に分離される。おむつ６０の分離には、従来からこの種の物品の製造方法における手法と同様の手法が採用される。このようにして形成されたパンツ型使い捨ておむつ６０においては、そのサイドシール部６４が、おむつ６０の縦方向と平行に形成されている。   In the separation step, the diaper continuous body 60 ′ formed in the side seal portion forming step is cut between the pair of side seal portions 64 (indicated by reference numeral C in FIG. 6) and separated into individual diapers 60. Is done. For the separation of the diaper 60, a method similar to the method in the manufacturing method of this type of article is conventionally employed. In the pants-type disposable diaper 60 formed in this way, the side seal portion 64 is formed in parallel with the vertical direction of the diaper 60.

以上、本発明をその好ましい実施形態に基づき説明したが、本発明は前記の実施形態に制限されない。例えば前記の実施形態においては、本発明の超音波接合装置が適用される製造の例としてパンツ型使い捨ておむつの製造を挙げたが、本発明の超音波接合装置は、その他のパンツ型着用物品、例えばパンツ型生理用ナプキン及びパンツ型失禁パッド等のパンツ型の吸収性物品や、吸収性本体ないし吸収体を具備しない、サニタリーショーツ、使い捨て下着などの製造にも好適に適用できる。   As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in the above-described embodiment, the manufacture of the pants-type disposable diaper is given as an example of the manufacture to which the ultrasonic bonding apparatus of the present invention is applied, but the ultrasonic bonding apparatus of the present invention includes other pants-type wearing articles, For example, it can be suitably applied to the production of pant-type absorbent articles such as pant-type sanitary napkins and pant-type incontinence pads, sanitary shorts, disposable underwear, etc. that do not have an absorbent main body or absorber.

前記の実施形態においては、パターンブロック３１は、アンビルロール、つまり回転体の周面に形成されていたが、これに代えて回転以外の運動をする受け部材に設けられていてもよい。例えば直線運動する過程を含む周回運動をする受け部材に設けられていてもよい。   In the above-described embodiment, the pattern block 31 is formed on the anvil roll, that is, the peripheral surface of the rotating body. However, the pattern block 31 may be provided on a receiving member that performs a motion other than rotation instead. For example, you may provide in the receiving member which carries out the revolving motion including the process of linear motion.

また前記の実施形態においては、横断面が細長い矩形の超音波ホーン２１を、該矩形の延びる方向がパターンブロック３１の延びる方向に対して傾斜するように配置したがこれに代えて、別の形態を有する超音波ホーンを用いてもよい。例えば超音波ホーンとして、図８に示すように、その横断面形状が菱形をしているものを用いることができる。このホーンを用いる場合には、該菱形における対角線が、パターンブロック３１の延びる方向と一致するように該ホーンを配置すればよい。それによって、パターンブロックの移動に伴い、該パターンブロックと該ホーンとの対向面積が、該パターンブロックの延びる方向に沿って変化（次第に増加し、その後次第に減少）するようになる。   Further, in the above-described embodiment, the rectangular ultrasonic horn 21 having an elongated cross section is arranged so that the extending direction of the rectangle is inclined with respect to the extending direction of the pattern block 31. You may use the ultrasonic horn which has. For example, as an ultrasonic horn, as shown in FIG. 8, a cross-sectional shape having a rhombus shape can be used. When this horn is used, the horn may be arranged so that the diagonal line in the rhombus coincides with the direction in which the pattern block 31 extends. As a result, as the pattern block moves, the opposing area between the pattern block and the horn changes (increases gradually and then gradually decreases) along the direction in which the pattern block extends.

また、前記の実施形態の接合装置においては、超音波振動部２０は、アンビルロール３０の回転方向ないし接線方向に対して固定状態になっていたが、これに代えて例えば背景技術の項で述べた特許文献２の図１及び図２に記載されている往復運動手段を用いて、超音波振動部２０をアンビルロール３０の周方向に沿う周面軌跡に沿って往復移動可能にしてもよい。   Moreover, in the joining apparatus of the said embodiment, although the ultrasonic vibration part 20 was a fixed state with respect to the rotation direction thru | or a tangential direction of the anvil roll 30, it describes instead, for example in the term of background art. The reciprocating means described in FIG. 1 and FIG. 2 of Patent Document 2 may be used to allow the ultrasonic vibration unit 20 to reciprocate along a circumferential locus along the circumferential direction of the anvil roll 30.

１０ 超音波接合装置
２０ 超音波振動部
３０ アンビルロール
３１，３１ａ，３１ｂ パターンブロック DESCRIPTION OF SYMBOLS 10 Ultrasonic bonding apparatus 20 Ultrasonic vibration part 30 Anvil roll 31, 31a, 31b Pattern block

Claims (10)

突条パターンブロックを有する受け部と、ホーンを有する超音波振動部とを備え、該突条パターンブロックと該ホーンとの間に接合対象物を介在させた状態下に、該突条パターンブロック及び該接合対象物を、該ホーンの振動方向と交差する方向に移動させつつ、該ホーンの超音波振動による摩擦で発生した熱によって該接合対象物を溶着させる超音波接合装置であって、
該突条パターンブロックは、その移動方向と直交する方向に延びており、
該ホーンは、その形状が、該突条パターンブロックの移動に伴い、該突条パターンブロックと該ホーンとの対向面積が、該突条パターンブロックの延びる方向に沿って変化するような形状となっている超音波接合装置。 The ridge pattern block comprising: a receiving portion having a ridge pattern block; and an ultrasonic vibration portion having a horn, and an object to be joined interposed between the ridge pattern block and the horn. An ultrasonic bonding apparatus for welding the bonding target object by heat generated by friction caused by ultrasonic vibration of the horn while moving the bonding target object in a direction crossing the vibration direction of the horn,
The ridge pattern block extends in a direction perpendicular to the moving direction,
The shape of the horn is such that the opposing area of the ridge pattern block and the horn changes along the extending direction of the ridge pattern block as the ridge pattern block moves. Ultrasonic bonding equipment. 前記ホーンを、その延びる方向が前記突条パターンブロックの延びる方向に対して傾斜するように配置して、該突条パターンブロックの移動に伴い、該突条パターンブロックと該ホーンとの対向面積が変化するようにした請求項１に記載の超音波接合装置。   The horn is arranged such that the extending direction thereof is inclined with respect to the extending direction of the ridge pattern block, and as the ridge pattern block moves, the opposing area of the ridge pattern block and the horn is increased. The ultrasonic bonding apparatus according to claim 1, wherein the ultrasonic bonding apparatus is changed. 前記ホーンは、前記突条パターンブロックの移動方向と直交する方向の長さが、溶着によって形成された接合線の長さと同じか又はそれよりも長くなっている請求項２に記載の超音波接合装置。   3. The ultrasonic bonding according to claim 2, wherein the horn has a length in a direction orthogonal to a moving direction of the ridge pattern block equal to or longer than a length of a bonding line formed by welding. apparatus. 前記ホーンはその横断面形状が菱形をしており、該菱形における対角線が、前記突条パターンブロックの延びる方向と一致するように該ホーンを配置して、該突条パターンブロックの移動に伴い、該突条パターンブロックと該ホーンとの対向面積が変化するようにした請求項１に記載の超音波接合装置。   The horn has a rhombus cross-sectional shape, the horn is arranged so that the diagonal line in the rhombus coincides with the direction in which the ridge pattern block extends, and along with the movement of the ridge pattern block, The ultrasonic bonding apparatus according to claim 1, wherein an opposing area of the ridge pattern block and the horn is changed. 前記受け部が、ロール軸方向に延びる前記突条パターンブロックを周面に有するアンビルロールからなる請求項１ないし４のいずれか一項に記載の超音波接合装置。   The ultrasonic bonding apparatus according to any one of claims 1 to 4, wherein the receiving portion includes an anvil roll having a protrusion pattern block extending in a roll axial direction on a peripheral surface. 同方向に移動する第１ウエブ及び第２ウエブを重ね合わせ、重ね合わされた状態の両ウエブを、超音波接合装置を用いて超音波接合して、該ウエブの移動方向と直交する方向に延びる接合線を形成するウエブの接合方法であって、
該超音波接合装置として、移動方向と直交する方向に延び、かつ該移動方向と同方向に移動する突条パターンブロックを有する受け部と、該突条パターンブロックに対向して配置され、かつホーンを有する超音波振動部とを備え、
該ホーンは、その形状が、該突条パターンブロックの移動に伴い、該突条パターンブロックと該ホーンとの対向面積が、該突条パターンブロックの延びる方向に沿って変化するような形状となっている超音波接合装置を用いるウエブの接合方法。 The first web and the second web that move in the same direction are overlapped, and the two webs in an overlapped state are ultrasonically bonded using an ultrasonic bonding apparatus, and the bonding extends in a direction orthogonal to the moving direction of the web. A web joining method for forming a wire,
As the ultrasonic bonding apparatus, a receiving portion having a ridge pattern block extending in a direction orthogonal to the movement direction and moving in the same direction as the movement direction, a horn arranged opposite to the ridge pattern block, and a horn An ultrasonic vibration part having
The shape of the horn is such that the opposing area of the ridge pattern block and the horn changes along the extending direction of the ridge pattern block as the ridge pattern block moves. Web joining method using an ultrasonic joining apparatus. 超音波接合を行う前に、第１ウエブ及び第２のウエブの少なくとも一方を予熱する請求項２に記載の接合方法。   The joining method according to claim 2, wherein at least one of the first web and the second web is preheated before ultrasonic joining. 前記突条パターンブロックとして、その延びる方向に沿う高さが異なるものを用いる請求項６又は７に記載の接合方法。   The joining method according to claim 6 or 7, wherein the protrusion pattern blocks having different heights along the extending direction are used. 股下部並びに該股下部から前後に延出する腹側部及び背側部を有し、該腹側部と該背側部とがそれらの両側部において接合されてサイドシール部を形成しているパンツ型着用物品の製造方法において、
前記着用物品を前記サイドシール部において開き、平面に展開した状態の展開体が、おむつ幅方向に連なって構成されている長尺のおむつ中間体を一方向に走行させ、
走行する前記おむつ中間体を、その走行方向に沿って二つ折りして腹側部予定部と背側部予定部とを対向させ、
対向状態の腹側部予定部と背側部予定部とを、超音波接合装置を用い、接合予定部において超音波接合して一対の前記サイドシール部を所定の間隔をおいて順次形成し、
一対の前記サイドシール部間において前記おむつ中間体を、その走行方向と直交する方向に沿って順次裁断する工程を有し、
前記超音波接合装置として、移動方向と直交する方向に延び、かつ該移動方向と同方向に移動する突条パターンブロックを有する受け部と、該突条パターンブロックに対向して配置され、かつホーンを有する超音波振動部とを備え、
該ホーンは、その形状が、該突条パターンブロックの移動に伴い、該突条パターンブロックと該ホーンとの対向面積が、該突条パターンブロックの延びる方向に沿って変化するような形状となっている超音波接合装置を用いるパンツ型着用物品の製造方法。 It has a crotch part and a ventral part and a dorsal part extending from the crotch part back and forth, and the abdomen part and the dorsal part are joined at both sides to form a side seal part. In the manufacturing method of the pants-type wearing article,
The wearing article is opened in the side seal part, and the unfolded body in a state of being unfolded in a plane travels in one direction through a long diaper intermediate configured to be continuous in the diaper width direction,
The diaper intermediate that travels is folded in two along the traveling direction so that the abdomen side planned portion and the back side planned portion are opposed to each other,
Using the ultrasonic bonding apparatus, the abdominal side planned portion and the back side planned portion in the opposed state are ultrasonically bonded in the planned bonding portion to sequentially form the pair of side seal portions at a predetermined interval,
A step of sequentially cutting the diaper intermediate body between the pair of side seal portions along a direction orthogonal to the traveling direction;
As the ultrasonic bonding apparatus, a receiving portion having a ridge pattern block extending in a direction orthogonal to the movement direction and moving in the same direction as the movement direction, a horn disposed opposite to the ridge pattern block, and a horn An ultrasonic vibration part having
The shape of the horn is such that the opposing area of the ridge pattern block and the horn changes along the extending direction of the ridge pattern block as the ridge pattern block moves. Of manufacturing a pants-type wearing article using the ultrasonic bonding apparatus. 前記受け部として、ロール軸方向に延びる前記突条パターンブロックを周面に有するアンビルロールを用い、
該アンビルロールは、その周面において、該突条パターンブロック以外の部位に凹部を有する請求項９に記載のパンツ型着用物品の製造方法。 As the receiving part, using an anvil roll having the ridge pattern block extending in the roll axial direction on the peripheral surface,
The manufacturing method of the underpants type wearing article of Claim 9 which has a recessed part in parts other than this ridge pattern block in the surrounding surface of this anvil roll.
JP2010275614A 2010-12-10 2010-12-10 Ultrasonic bonding apparatus, web bonding method using the same, and manufacturing method of pants-type wearing articles using the same Active JP5728214B2 (en)

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JP2017525567A (en) * 2014-07-28 2017-09-07 ヘルマン ウルトラシャルテクニーク ゲーエムベーハー ウント コー．カーゲーＨｅｒｒｍａｎｎ Ｕｌｔｒａｓｃｈａｌｌｔｅｃｈｎｉｋ Ｇｍｂｈ ＆ Ｃｏ．Ｋｇ Ultrasonic material processing apparatus having trigger device
JP2017533827A (en) * 2014-10-24 2017-11-16 ヘルマン ウルトラシャルテクニーク ゲーエムベーハー ウント コー．カーゲーＨｅｒｒｍａｎｎ Ｕｌｔｒａｓｃｈａｌｌｔｅｃｈｎｉｋ Ｇｍｂｈ ＆ Ｃｏ．Ｋｇ Surface structuring element for ultrasonic machining
CN112157914A (en) * 2015-04-01 2021-01-01 杜凯恩Ias有限责任公司 Device for producing elastic nonwoven material
WO2017163754A1 (en) * 2016-03-24 2017-09-28 大王製紙株式会社 Method for forming elastic film stretchable structure, and absorbent article
JP2017170788A (en) * 2016-03-24 2017-09-28 大王製紙株式会社 Method for forming elastic film expansion structure and absorbent article
US12004927B2 (en) 2016-03-24 2024-06-11 Daio Paper Corporation Method for forming elastic film stretchable structure and absorbent article
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EP3478480B1 (en) 2016-09-15 2021-09-01 Curt G. Joa, Inc. Dual bonder
US10758428B2 (en) 2016-10-11 2020-09-01 Zuiko Corporation Stretchable sheet, worn article using the same, and stretchable sheet manufacturing apparatus
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KR20190067157A (en) * 2016-10-11 2019-06-14 가부시키가이샤 즈이코 A stretch sheet, a wearing article using the same, and a device for manufacturing a stretch sheet
CN109661218A (en) * 2016-10-11 2019-04-19 株式会社瑞光 The manufacturing device of flexible sheet material, the dress article for the sheet material that stretched using this and flexible sheet material
CN109661218B (en) * 2016-10-11 2021-09-14 株式会社瑞光 Stretchable sheet, wearing article using same, and device for producing stretchable sheet
WO2018070150A1 (en) * 2016-10-11 2018-04-19 株式会社瑞光 Stretchable sheet, wearable article using same, and stretchable sheet production device
JP7036733B2 (en) 2016-10-11 2022-03-15 株式会社瑞光 Telescopic sheet, worn goods using it, and equipment for manufacturing elastic sheet
JPWO2018070150A1 (en) * 2016-10-11 2019-08-08 株式会社瑞光 Stretchable sheet, wearing article using the same, and stretchable sheet manufacturing apparatus
DE102017119273A1 (en) * 2017-08-23 2019-02-28 Herrmann Ultraschalltechnik Gmbh & Co. Kg Welding tool with sealing surface
US11820082B2 (en) 2017-08-23 2023-11-21 Herrmann Ultraschalltechnik Gmbh & Co. Kg Welding method for a multilayer composite having a barrier layer
US11219556B2 (en) 2018-04-30 2022-01-11 Kimberly-Clark Worldwide, Inc. Manufacturing processes for absorbent articles with improved side seam bonding
US11813800B2 (en) 2019-07-11 2023-11-14 Curt G. Joa, Inc. Method and apparatus for improved ultrasonic bonding
JP2022112764A (en) * 2021-01-22 2022-08-03 株式会社リブドゥコーポレーション Ultrasonic welding device and side seal part formation method
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