WO2016121344A1 - 二重容器 - Google Patents

二重容器 Download PDF

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Publication number
WO2016121344A1
WO2016121344A1 PCT/JP2016/000276 JP2016000276W WO2016121344A1 WO 2016121344 A1 WO2016121344 A1 WO 2016121344A1 JP 2016000276 W JP2016000276 W JP 2016000276W WO 2016121344 A1 WO2016121344 A1 WO 2016121344A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer body
outer layer
pouring
inner layer
contents
Prior art date
Application number
PCT/JP2016/000276
Other languages
English (en)
French (fr)
Inventor
慎太郎 沓澤
Original Assignee
株式会社吉野工業所
慎太郎 沓澤
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社吉野工業所, 慎太郎 沓澤 filed Critical 株式会社吉野工業所
Priority to CN201680006049.5A priority Critical patent/CN107207113B/zh
Priority to US15/543,505 priority patent/US10407232B2/en
Priority to EP16742949.7A priority patent/EP3251961B1/en
Publication of WO2016121344A1 publication Critical patent/WO2016121344A1/ja
Priority to US16/522,428 priority patent/US10858165B2/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D79/00—Kinds or details of packages, not otherwise provided for
    • B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
    • B65D79/008—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars
    • B65D79/0084—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars in the sidewall or shoulder part thereof
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0017—Combinations of extrusion moulding with other shaping operations combined with blow-moulding or thermoforming
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
    • B65D1/0215—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features multilayered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/023—Neck construction
    • B65D1/0246—Closure retaining means, e.g. beads, screw-threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/0261—Bottom construction
    • B65D1/0276—Bottom construction having a continuous contact surface, e.g. Champagne-type bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D23/00—Details of bottles or jars not otherwise provided for
    • B65D23/02—Linings or internal coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/14—Non-removable lids or covers
    • B65D43/16—Non-removable lids or covers hinged for upward or downward movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/08—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having articulated or hinged closures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/08—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having articulated or hinged closures
    • B65D47/0804—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having articulated or hinged closures integrally formed with the base element provided with the spout or discharge passage
    • B65D47/0833—Hinges without elastic bias
    • B65D47/0838—Hinges without elastic bias located at an edge of the base element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/20—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/32—Closures with discharging devices other than pumps with means for venting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D51/00—Closures not otherwise provided for
    • B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/0055—Containers or packages provided with a flexible bag or a deformable membrane or diaphragm for expelling the contents
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step blow moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2205/00—Venting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0006—Upper closure
    • B65D2251/0018—Upper closure of the 43-type
    • B65D2251/0021—Upper closure of the 43-type of the B65D43/16-type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0006—Upper closure
    • B65D2251/0025—Upper closure of the 47-type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0006—Upper closure
    • B65D2251/0028—Upper closure of the 51-type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2251/00—Details relating to container closures
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    • B65D2251/0068—Lower closure
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0068—Lower closure
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0068—Lower closure
    • B65D2251/009—Lower closure of the 51-type

Definitions

  • the present invention relates to a double container in which an inner layer body for storing contents is provided inside an outer layer body.
  • an outer layer body that is a regular outer shell and an inner layer body are provided.
  • a double container including an inner layer body for storing contents is known (see, for example, Patent Document 1).
  • This type of container has an outside air introduction hole in the outer layer body, and is configured so that outside air can be taken in between the outer layer body and the inner layer body. Thereby, even if the contents are poured out, only the inner layer body can be volume-reformed and deformed with the shape of the outer layer body remaining unchanged.
  • such a double container is provided with an adhesive band that partially bonds the outer layer body and the inner layer body for the purpose of reducing the volume of the inner layer body evenly.
  • the outer layer body is provided so as to be opposed to each other with the central axis line interposed therebetween, and two outside air introduction holes are generally provided at positions shifted by 90 degrees in the circumferential direction with respect to the opposed adhesive bands.
  • the inner layer body is deformed and reduced so as to be symmetric with respect to the central axis of the outer layer body.
  • the outer layer body has two portions with low rigidity in which the inner layer body is separated from the outer layer body and two portions with high rigidity in which the inner layer body and the outer layer body are joined by an adhesive band, and the same kind of portions are the outer layers. It is located symmetrically with respect to the central axis of the body.
  • the portion to which the thumb is applied and the portion to which the index finger to the little finger are applied are positioned substantially symmetrically with respect to the central axis of the outer layer body.
  • the parts of the outer layer body having low rigidity or the parts having high rigidity are pressed.
  • there is no difference between the rigidity of the part to which the thumb is applied and the rigidity of the part to which the index finger is applied to the little finger and there is no advantage of flexibility, so both parts must be bent together in order to dispense the contents. It was necessary to press with a slightly strong force.
  • An object of the present invention is to solve such a conventional problem, and an object of the present invention is to propose a new double container capable of discharging contents with as little pressing force as possible. By the way.
  • the present invention has an outer layer body having a mouth part, a body part and a bottom part having an opening at the top, a filling space for storing the contents, and is provided inside the outer layer body, and pouring the contents from the filling space.
  • a double container comprising an inner layer body that is deformed to reduce its volume as it comes out, Between the outer layer body and the inner layer body, there is provided only one adhesive band extending along the central axis of the outer layer body and partially bonding the outer layer body and the inner layer body, The outer layer body is provided with only one outside air introduction hole that takes in outside air between the outer layer body and the inner layer body at a position shifted in the circumferential direction with respect to the adhesive band, The pseudo inner surface facing the outside air introduction hole and separated from the outer surface of the inner layer body, and facing the separation surface and detachably bonded to the outer surface of the inner layer body This is a double container composed of an adhesive surface.
  • the outer layer body When the outer layer body is displaced to a tilted posture when the contents are poured out, it is preferable to have guiding means for guiding the outer layer body so that the separation surface and the pseudo-adhesion surface are positioned on both sides in the horizontal direction.
  • the mouth portion is provided with a pouring cap for pouring the contents of the filling space to the outside, and a lid body connected to the pouring cap via a hinge is provided, the hinge being connected to the separation surface and the pseudo
  • the guiding means In the state where the adhesive surfaces are located on both sides in the horizontal direction and the outer layer body is displaced in a tilted posture, it is preferable to provide the guiding means by providing it above the pouring cap.
  • the pouring cylinder is provided with a pouring cap that has a top wall that covers the opening of the mouth and a pouring cylinder that rises from the ceiling wall and that allows the contents to be poured out from the pouring cylinder to the outside.
  • the length of the portion located below is longer than the other portions.
  • the guiding means is preferable.
  • the mouth is provided with a pouring cap for pouring the contents of the filling space to the outside, and the pouring cap is provided with a pouring cylinder having a lip with its tip curved radially outward at the top thereof, By providing the lip only in a portion located below the top in a state where the separation surface and the pseudo-adhesion surface are located on both sides in the horizontal direction and the outer layer body is displaced in a tilted posture, It is preferable to do.
  • the outside air introduction hole is provided at a position shifted by 90 degrees in the circumferential direction with respect to the adhesive band.
  • only one adhesive band extending between the outer layer body and the inner layer body along the central axis of the outer layer body and partially bonding the outer layer body and the inner layer body is provided.
  • Only one outside air introduction hole for taking in outside air between the outer layer body and the inner layer body is provided at a position shifted in the circumferential direction with respect to the adhesive band, and the inner surface of the outer layer body faces the outside air introduction hole and the inner layer A separation surface separated from the outer surface of the body and a pseudo-adhesion surface facing the separation surface and releasably adhered to the outer surface of the inner layer body. That is, the rigidity of the outer layer body is higher on the side where the pseudo-adhesion surface is located than the side where the separation surface is located.
  • the side where the separation surface is located preferentially bends.
  • the side where the separation surface is located preferentially bends.
  • the contents can be poured out by pressure.
  • FIG. 2 is a cross-sectional view taken along AA shown in FIG.
  • FIG. 6 is a cross-sectional view taken along the line BB shown in FIG.
  • FIG. 8 is a cross-sectional view taken along the line CC shown in FIG.
  • the double container 1 denotes an embodiment of a double container according to the present invention.
  • the double container 1 includes an outer layer body 2 that forms an outer shell of the container, an inner layer body 3 that has a filling space M for storing contents and is provided inside the outer layer body 2. It has.
  • the outer layer body 2 is formed of a synthetic resin such as polyethylene or polypropylene and has a fixed shape. As shown in FIG. 1 and FIG. 2, the outer layer body 2 is connected to a cylindrical mouth portion 2a having an opening at the upper end and a cylindrical body portion 2b having a diameter larger than that of the mouth portion 2a. The other end of the portion 2b is closed at the bottom 2c.
  • the outer layer body 2 of the present embodiment is configured by a blow molding die that is divided into two with the central axis C of the outer layer body 2 interposed therebetween. The mouth portion 2a, the body portion 2b, and the bottom portion 2c are shown in FIG. As shown in FIG. 3, a parting line L corresponding to the dividing surface of the mold is formed.
  • the mouth 2a is provided with only one hole (outside air introduction hole 2d) penetrating the mouth 2a.
  • the outside air introduction hole 2d can be provided at any position in the circumferential direction as long as it avoids an adhesive band described later. Further, it can be provided by being shifted in the direction of the central axis C, and may be provided on the body 2b or the bottom 2c. Further, on the outer surface of the mouth portion 2a, a screw portion 2e for mounting a later-described extraction cap is provided so as to avoid the outside air introduction hole 2d.
  • the inner layer body 3 is formed of a thin synthetic resin having flexibility.
  • a material having low compatibility with the outer layer body 2 for example, ethylene vinyl alcohol copolymer, nylon (polyamide), etc. is used.
  • only one adhesive band 4 extending along the central axis C of the outer layer body 2 and connecting the outer layer body 2 and the inner layer body 3 is provided.
  • it is provided on the parting line L as shown in FIG. 3, and extends from the end of the mouth 2a to the connecting portion between the body 2b and the bottom 2c.
  • the extending length of the adhesive band 4 and the starting position can be variously selected.
  • the adhesive band 4 may extend from the end of the mouth 2a to the center of the bottom 2c, or only to the body 2b. May be present.
  • the double container 1 of the present embodiment is provided between, for example, a cylindrical outer layer parison that forms the outer layer body 2, a cylindrical inner layer parison that forms the inner layer body 3, and the outer layer parison and the inner layer parison,
  • the longitudinal strip adhesive layer forming the adhesive strip 4 is co-extruded from a die for multilayer extrusion molding to extrude the laminated parison, and is sandwiched between blow molding dies positioned below the die and blow molded.
  • the outside air introduction hole 2d can be formed using a punch or the like after blow molding.
  • the contents in the filling space M can be poured out by attaching the pouring cap 10 illustrated in FIGS. 5 to 8 to the mouth portion 2 a.
  • . 5 to 8 includes an inner stopper 11, a moving valve body 12, a check valve 13, and a dispensing cap body 14. Further, a lid body 16 is integrally provided on the side portion of the dispensing cap main body 14 via a hinge 15.
  • the inner plug 11 includes a through-hole 11a through which contents pass and a cylindrical wall 11b with both ends open, and is provided at the opening of the mouth 2a.
  • the moving valve body 12 has a spherical shape, and is arranged inside the cylindrical wall 11b so as to be movable along the axis of the cylindrical wall 11b.
  • the check valve 13 is in the form of a so-called three-point valve and is disposed on the upper surface of the inner plug 11.
  • the valve body 13a of the check valve 13 is normally seated on the upper surface of the inner plug 11 and closes the through hole 11a.
  • the valve body 13a is not completely closed with respect to the cylindrical wall 11b, and the clearance gap part of the elastic piece which supports the valve body 13a is always open
  • the dispensing cap main body 14 includes a top wall 14a that covers the opening of the mouth portion 2a together with the inner plug 11, and a mounting cylinder 14b that is connected to the edge of the top wall 14a and held by the mouth portion 2a.
  • the top wall 14a is provided with a cylindrical dispensing cylinder 14c. Further, a lip 14d whose tip is curved radially outward is provided at the top of the dispensing cylinder 14c.
  • the top wall 14 a is provided with a vent 14 e for taking in air between the outer layer body 2 and the inner layer body 3.
  • the movable valve body 12 since the movable valve body 12 also returns to the original position, the contents in the dispensing cylinder 14c can be pulled back from the gap portion of the elastic piece that supports the valve body 13a that is always open (sack). Back), dripping from the dispensing cylinder 14c can be prevented.
  • the outer layer body 2 By releasing the pressure, the outer layer body 2 tries to return to its original shape, and accordingly, the outer layer body 2 and the inner layer body 3 become negative pressure, so the outside air is poured out through the vent hole 14e. It is taken into the cap body 14 and introduced between the outer layer body 2 and the inner layer body 3 through the outside air introduction hole 2d. Thereby, only the outer layer body 2 is restored while the inner layer body 3 is deformed and deformed.
  • the rigidity of the outer layer body 2 on the side where the separation surface 2f is located is smaller than the side where the pseudo adhesion surface 2g is located because the inner layer body 3 is not thick.
  • the outer layer body 2 on the side where the separation surface 2f is located is preferentially given to the outer layer body 2 on the side where the pseudo-adhesion surface 2g is located.
  • the outer layer body 2 when the outer layer body 2 is displaced from the upper side when the contents are poured out, the outer layer body 2 can be easily pressed when the outer layer body 2 is held from above.
  • the belly of the finger that presses the outer layer body 2 in this state is located on both sides in the horizontal direction across the central axis of the outer layer body 2, so that the separation surface 2 f and the pseudo adhesion surface 2 g are on both sides in the horizontal direction. It is preferable to be located. Therefore, it is preferable that the double container 1 is provided with guiding means for holding the outer layer body 2 in such a posture without being particularly conscious.
  • a guiding means for example, in the state in which the separation surface 2f and the pseudo adhesion surface 2g are located on both sides in the horizontal direction and the outer layer body 2 is displaced to the tilted posture as in the hinge 15 shown in FIGS. And providing so as to be positioned above the dispensing cap 10. That is, when the lid 16 is opened and the contents are poured out, the hinge 15 is positioned above the dispensing cap 10 as shown in the drawing so that the lid 16 does not hinder the dispensing of the contents. Since the outer layer body 2 is naturally held so as to be in a posture (the open lid body 16 is located above the pouring cap), the separation surface 2f and the pseudo adhesion surface 2g are positioned on both sides in the horizontal direction as expected. Can be induced to do.
  • the guiding means in the state where the separation surface 2f and the pseudo-adhesion surface 2g are positioned on both sides in the horizontal direction and the outer layer body 2 is displaced in a tilted posture, as in the dispensing cylinder 14c shown in FIGS.
  • the lower portion may be provided so that the length of the portion located below is longer than the other portions. 7 and 8, the separation surface 2f and the pseudo-adhesion surface 2g are located on both sides in the horizontal direction and the outer layer body 2 is displaced in the tilted posture, and the top of the dispensing tube 14c is You may provide this only in the part located below.
  • the guiding means is not limited to the above-described ones, and various configurations can be applied.
  • the guiding means is hooked on the outer surface of the outer layer body 2 on the side where the separation surface 2f and the pseudo adhesion surface 2g are located. You may provide the recessed part and convex part which become.
  • the volume reduction deformation of the inner layer body 3 may not sufficiently proceed when the contents are poured out.
  • the area of the separation surface 2f is too large with respect to the pseudo adhesion surface 2g, the range in which the outer layer body 2 can be preferentially bent is reduced.
  • approximately half of the inner surface of the outer layer body 2 becomes the separation surface 2f with the adhesive band 4 as a boundary. Since half of this is the pseudo-adhesive surface 2g, both the above-described functions can be effectively made compatible.
  • Double container 2 Outer layer body 2a: Mouth portion 2b: Body portion 2c: Bottom portion 2d: Outside air introduction hole 2e: Screw portion 2f: Separation surface 2g: Pseudo-adhesion surface 3: Inner layer body 4: Adhesive band 10: Extraction Cap 11: Inner plug 11a: Through hole 11b: Cylindrical wall 12: Moving valve body 13: Check valve 13a: Valve body 14: Discharge cap body 14a: Top wall 14b: Mounting cylinder 14c: Discharge cylinder 14d: Lip 14e: Ventilation hole 15: Hinge 16: Lid C: Center axis L: Parting line M: Filling space

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Abstract

　本発明の二重容器（１）は、外層体（２）と、内容物を収納する充填空間を有するとともに外層体の内側に設けられる内層体（３）とを備え、外層体（２）と内層体（３）との相互間に、中心軸線（Ｃ）に沿って延在し、外層体（２）と内層体（３）とを部分的に結合させる接着帯（４）を１本のみ設け、外層体（２）に、外層体（２）と内層体（３）との相互間に外気を取り込む外気導入孔（２ｄ）を、接着帯（４）に対して周方向にずれた位置に１つのみ設け、外層体（２）の内面を、外気導入孔（２ｄ）に面するとともに内層体（３）の外面に対して分離した分離面（２ｆ）と、分離面（２ｆ）に対向するとともに内層体（３）の外面に対して剥離可能に接着した疑似接着面（２ｇ）とで構成している。

Description

二重容器
　本発明は、内容物を収納する内層体を外層体の内側に設けた二重容器に関するものである。
　化粧水などの化粧料やシャンプーやリンス或いは液体石鹸、各種の薬剤、また食品調味料などを内容物として収納する容器としては、定形の外殻となる外層体と、外層体の内側に設けられ内容物を収納する内層体とを備える二重容器が知られている（例えば特許文献１参照）。この種の容器は、外層体に外気導入孔を備えていて、外層体と内層体との相互間に外気を取り込むことができるように構成している。これにより、内容物を注出させても外層体の形状は元のままで内層体のみを減容変形させることができる。
　このような二重容器は、特許文献１に示されている如く、内層体を全体的に均等に減容変形させることを目的として、外層体と内層体とを部分的に結合させる接着帯を外層体の中心軸線を挟んで対向するように設け、更に、２つの外気導入孔を対向する接着帯に対してそれぞれ周方向に９０度ずれた位置に設けることが一般的である。
特開２００３－１３７２４１号公報
　ところで対向配置となる接着帯及び２つの外気導入孔を設ける場合、内層体は、外層体の中心軸線に対して対称となるように減容変形する。すなわち外層体には、内層体が外層体から分離した剛性が低い２つの部分と、接着帯によって内層体と外層体とが結合した剛性の高い２つの部分が存在し、同種の部分同士が外層体の中心軸線に対して対称に位置することになる。
　そして、外層体を片手で保持する場合、親指をあてがう部分と、人差し指から小指までをあてがう部分とは、外層体の中心軸線に対して概ね対称に位置することになることから、内容物を注出させるには、外層体の剛性が低い部分同士、或いは剛性が高い部分同士を押圧することになる。すなわち、親指をあてがう部分の剛性と人差し指から小指までをあてがう部分の剛性には差がなく、撓みやすさの優位性がないため、内容物を注出させるには両方の部分をともに撓ませなければならず、やや強い力で押圧する必要があった。
　本発明は、このような従来の問題点を解決することを課題とするものであり、その目的は、できるだけ小さい押圧力で内容物を注出させることができる、新たな二重容器を提案するところにある。
　本発明は、上部を開口させた口部、胴部及び底部を有する外層体と、内容物を収納する充填空間を有するとともに該外層体の内側に設けられ、該充填空間からの内容物の注出に伴って減容変形する内層体とを備えた二重容器であって、
　前記外層体と前記内層体との相互間に、該外層体の中心軸線に沿って延在し、該外層体と該内層体とを部分的に結合させる接着帯を１本のみ設け、
　該外層体に、該外層体と該内層体との相互間に外気を取り込む外気導入孔を、該接着帯に対して周方向にずれた位置に１つのみ設け、
　該外層体の内面を、該外気導入孔に面するとともに該内層体の外面に対して分離した分離面と、該分離面に対向するとともに該内層体の外面に対して剥離可能に接着した疑似接着面とで構成してなる二重容器である。
　内容物の注出にあたって前記外層体を傾倒姿勢に変位させるに際し、前記分離面と前記疑似接着面が水平方向両側に位置するように該外層体を導く誘導手段を有することが好ましい。
　前記口部に、前記充填空間の内容物を外界に注出させる注出キャップを設け、該注出キャップに、ヒンジを介して連結する蓋体を設け、該ヒンジを、前記分離面と前記疑似接着面が水平方向両側に位置し且つ前記外層体を傾倒姿勢に変位させた状態において、該注出キャップの上方に設けることで前記誘導手段とすることが好ましい。
　前記口部に、該口部の開口を覆う天壁と該天壁から立ち上がる注出筒とを有し該注出筒から内容物を外界に注出させる注出キャップを設け、該注出筒を、前記分離面と前記疑似接着面が水平方向両側に位置し且つ前記外層体を傾倒姿勢に変位させた状態において、下方に位置する部分の長さが他の部分よりも長くなるように設けることで前記誘導手段とすることが好ましい。
　前記口部に、前記充填空間の内容物を外界に注出させる注出キャップを設け、前記注出キャップに、先端を径方向外側に湾曲させたリップをその頂部に有する注出筒を設け、該リップを、前記分離面と前記疑似接着面が水平方向両側に位置し且つ前記外層体を傾倒姿勢に変位させた状態において、該頂部の下方に位置する部分のみに設けることで前記誘導手段とすることが好ましい。
　前記外気導入孔は、前記接着帯に対して周方向に９０度ずれた位置に設けることが好ましい。
　本発明では、外層体と内層体との相互間に、外層体の中心軸線に沿って延在し、外層体と内層体とを部分的に結合させる接着帯を１本のみ設け、外層体に、外層体と内層体との相互間に外気を取り込む外気導入孔を、接着帯に対して周方向にずれた位置に１つのみ設け、外層体の内面を、外気導入孔に面するとともに内層体の外面に対して分離した分離面と、分離面に対向するとともに内層体の外面に対して剥離可能に接着した疑似接着面とで構成している。すなわち、外層体の剛性は、分離面が位置する側に対して疑似接着面が位置する側では高くなるため、外層体を押圧すると、分離面が位置する側が優先的に撓むことになる。換言すると、外層体を片手で保持する場合、親指をあてがう部分と人差し指から小指までをあてがう部分の何れか一方を優先的に撓ませることができるため、両方を撓ませる場合に比して小さい押圧力で内容物を注出させることができる。
本発明に従う二重容器の一実施形態を示す正面図である。 図１に示す二重容器の側面図である。 図１に示す二重容器の平面図である。 図１に示すＡ－Ａに沿う断面図である。 図１に示す二重容器に注出キャップを装着した、本発明に従う他の実施形態を示す側面視での断面図である。 図５に示すＢ－Ｂに沿う断面図である。 図５の注出キャップに代えて別の注出キャップを装着した、本発明に従う更に他の実施形態を示す側面視での断面図である。 図７に示すＣ－Ｃに沿う断面図である。
　以下、図面を参照しながら本発明をより具体的に説明する。図中、符号１は、本発明に従う二重容器の一実施形態を示す。図１～図４に示すように二重容器１は、容器の外殻を形成する外層体２と、内容物を収納する充填空間Ｍを有するとともに外層体２の内側に設けられる内層体３とを備えている。
　外層体２は、ポリエチレン、ポリプロピレン等の合成樹脂で形成されていて、定形性を有するものである。図１、図２に示すように外層体２は、上部を開口させた円筒状の口部２ａに、口部２ａよりも大径となる円筒状の胴部２ｂの一端を連結するとともに、胴部２ｂの他端を底部２ｃで閉鎖した形態をなしている。本実施形態の外層体２は、外層体２の中心軸線Ｃを挟んで２つに分割したブロー成形金型で構成されていて、口部２ａ、胴部２ｂ、底部２ｃには、図２、図３に示すように金型の分割面に対応するパーティングラインＬが形成されている。
　また口部２ａには、口部２ａを貫通する孔（外気導入孔２ｄ）が１つのみ設けられている。本実施形態では、パーティングラインＬに対して周方向に９０度ずれた位置に設けられている。なお外気導入孔２ｄは、後述する接着帯を避けた位置であれば周方向の任意の位置に設けることができる。また、中心軸線Ｃ方向にずらして設けることも可能であって、胴部２ｂや底部２ｃに設けてもよい。また口部２ａの外面には、後述する注出キャップを装着するためのねじ部２ｅが、外気導入孔２ｄを避けて設けられている。
　内層体３は、柔軟性を有する薄肉の合成樹脂で形成されている。本実施形態にあっては、外層体２に対して相溶性の低い材料（例えば、エチレンビニルアルコール共重合体、ナイロン（ポリアミド）等）を用いている。
　外層体２と内層体３の相互間には、外層体２の中心軸線Ｃに沿って延在し、外層体２と内層体３とを結合させる接着帯４が１本のみ設けられている。本実施形態では、図３に示すようにパーティングラインＬ上に設けられていて、口部２ａの端部から胴部２ｂと底部２ｃとの連結部まで延在している。なお、接着帯４の延在長さ及び起点となる位置は種々選択可能であり、例えば口部２ａの端部から底部２ｃの中央部まで延在させてもよく、また胴部２ｂのみに延在させてもよい。
　そして、外層体２の内面は、接着帯４が設けられた部位を除いて、外気導入孔２ｄに面するとともに内層体３の外面に対して分離した分離面２ｆ（図３では、中心軸線Ｃを中心として接着帯４の縁から時計回りに１８０度の領域）と、分離面２ｆに対向するとともに内層体３の外面に対して剥離可能に接着した疑似接着面２ｇ（図３では、接着帯４の縁から反時計回りに１８０度の領域）とから構成されている。
　本実施形態の二重容器１は、例えば外層体２を形成する筒状の外層パリソンと、内層体３を形成する筒状の内層パリソンと、外層パリソンと内層パリソンとの相互間に設けられ、接着帯４を形成する縦帯接着層とを、多層押出成形用ダイスから共押出しして積層パリソンを押出成形し、これをダイスの下方に位置させたブロー成形金型で挟み込むとともにブロー成形することによって得ることができる。この場合、外気導入孔２ｄは、ブロー成形後にパンチ等を用いて形成することができる。また、成形直後の外層体２の内面は、接着帯４が設けられた部位を除き、その全周が内層体３の外面と剥離可能に接着した状態になっているものの、外気導入孔２ｄから内層体３に対して空気を吹き込むことで内層体３を外層体２から剥離させて、分離面２ｆを形成することができる。
　このような二重容器１にあっては、図５～図８に例示するような注出キャップ１０を口部２ａに装着することで、充填空間Ｍ内の内容物を注出することができる。図５～図８の注出キャップ１０は、中栓１１、移動弁体１２、逆止弁１３、注出キャップ本体１４で構成されている。また注出キャップ本体１４の側部には、ヒンジ１５を介して蓋体１６を一体に設けている。
　中栓１１は、内容物が通過する貫通孔１１ａ及び両端を開放した筒状壁１１ｂを備えていて、口部２ａの開口に設けられる。移動弁体１２は球状をなしていて、筒状壁１１ｂの内部において、筒状壁１１ｂの軸線に沿って移動可能に配置されている。逆止弁１３は、所謂３点弁の如き形態をなしていて、中栓１１の上面に配置される。逆止弁１３の弁体１３ａは、通常は中栓１１の上面に着座しており、貫通孔１１ａを閉鎖している。なお、筒状壁１１ｂに対し、弁体１３ａは完全には塞いでおらず、弁体１３ａを支持する弾性片の隙間部分が常時開放されている。注出キャップ本体１４は、中栓１１とともに口部２ａの開口を覆う天壁１４ａと、天壁１４ａの縁部に連結して口部２ａに保持される装着筒１４ｂとを備えている。また、天壁１４ａには、円筒状の注出筒１４ｃを設けている。更に注出筒１４ｃの頂部には、先端を径方向外側に湾曲させたリップ１４ｄを設けている。また天壁１４ａには、外層体２と内層体３との相互間に空気を取り込むための通気口１４ｅが設けられている。
　このような注出キャップ１０によれば、外層体２を傾倒姿勢に変位させて押圧すると、充填空間Ｍが加圧されて、弁体１３ａが中栓１１から離反する。これに伴い充填空間Ｍの内容物が貫通孔１１ａを通して注出筒１４ｃから注出される。またこの時、移動弁体１２は、注出筒１４ｃ側に向けて筒状壁１１ｂ内を移動する。その後、外層体２の押圧を解除して元の姿勢に戻せば、充填空間Ｍの圧力が下がるため、弁体１３ａが中栓１１に着座して貫通孔１１ａは閉鎖される。またこの時、移動弁体１２も元の位置に戻るため、これに伴い注出筒１４ｃ内の内容物を、常時開放した弁体１３ａを支持する弾性片の隙間部分から引き戻すことができ（サックバック）、注出筒１４ｃからの液だれを防ぐことができる。なお、押圧を解除することで外層体２は元の形状に戻ろうとし、これに伴い外層体２と内層体３との相互間が負圧になるため、外気が、通気口１４ｅを通して注出キャップ本体１４内に取り込まれ、外気導入孔２ｄから外層体２と内層体３との相互間に導入される。これにより、内層体３を減容変形させたまま、外層体２だけが復元する。
　このような構成になる二重容器１において、分離面２ｆが位置する側での外層体２の剛性は、内層体３の厚みがない分、疑似接着面２ｇが位置する側よりも小さくなる。このため、内容物を注出させるにあたって片手で外層体２を押圧すると、分離面２ｆが位置する側の外層体２を、疑似接着面２ｇが位置する側の外層体２に対して優先的に撓ませることができる。つまり、対向する外層体部分を両方とも撓ませていた従来の二重容器に対して、より小さい押圧力で内容物を注出させることができる。
　また、このような二重容器１にあっては、内容物の注出にあたって外層体２を傾倒姿勢に変位させるに際し、外層体２を上方から持つようにすると外層体２を押圧しやすくなる。換言すると、この状態において外層体２を押圧する指の腹は、外層体２の中心軸線を挟んで水平方向両側に位置することになるため、分離面２ｆと疑似接着面２ｇが水平方向両側に位置するようにすることが好ましい。よって二重容器１には、特に意識せずともこのような姿勢で外層体２を保持する誘導手段を設けることが好ましい。
　このような誘導手段としては、例えば図５～図８に示すヒンジ１５のように、分離面２ｆと疑似接着面２ｇが水平方向両側に位置し且つ外層体２を傾倒姿勢に変位させた状態において、注出キャップ１０の上方に位置するように設けることが挙げられる。すなわち、蓋体１６を開いて内容物を注出するにあたっては、蓋体１６が内容物の注出を妨げないようにするべく、図示のようにヒンジ１５が注出キャップ１０の上方に位置する（開いた蓋体１６が注出キャップの上方に位置する）姿勢になるように自然に外層体２を保持するため、所期した通り、分離面２ｆと疑似接着面２ｇが水平方向両側に位置するように誘導することができる。
　また他の誘導手段として、図５、図６に示す注出筒１４ｃのように、分離面２ｆと疑似接着面２ｇが水平方向両側に位置し且つ外層体２を傾倒姿勢に変位させた状態において、下方に位置する部分の長さが他の部分よりも長くなるように設けてもよい。また図７、図８に示すリップ１４ｄのように、分離面２ｆと疑似接着面２ｇが水平方向両側に位置し且つ外層体２を傾倒姿勢に変位させた状態において、注出筒１４ｃの頂部の下方に位置する部分のみにこれを設けてもよい。なお、誘導手段は上述したものに限定されるものではなく、種々の構成が適用可能であって、例えば、分離面２ｆと疑似接着面２ｇが位置する側の外層体２の外面に、指掛かりとなる凹部や凸部を設けてもよい。
　なお、疑似接着面２ｇに対して分離面２ｆの面積が小さすぎると、内容物を注出させた際に内層体３の減容変形が十分に進まないおそれがある。また、疑似接着面２ｇに対して分離面２ｆの面積が大きすぎると、外層体２を優先的に撓ませることができる範囲が小さくなる。これに対し、本実施形態のように接着帯４に対して周方向に９０度ずれた位置に設ける場合は、接着帯４を境として外層体２の内面の略半分が分離面２ｆとなり、残りの半分が疑似接着面２ｇとなるため、上述した両方の機能を有効に両立させることができる。
１：二重容器
２：外層体
２ａ：口部
２ｂ：胴部
２ｃ：底部
２ｄ：外気導入孔
２ｅ：ねじ部
２ｆ：分離面
２ｇ：疑似接着面
３：内層体
４：接着帯
１０：注出キャップ
１１：中栓
１１ａ：貫通孔
１１ｂ：筒状壁
１２：移動弁体
１３：逆止弁
１３ａ：弁体
１４：注出キャップ本体
１４ａ：天壁
１４ｂ：装着筒
１４ｃ：注出筒
１４ｄ：リップ
１４ｅ：通気口
１５：ヒンジ
１６：蓋体
Ｃ：中心軸線
Ｌ：パーティングライン
Ｍ：充填空間

Claims (6)

  1. 　上部を開口させた口部、胴部及び底部を有する外層体と、内容物を収納する充填空間を有するとともに該外層体の内側に設けられ、該充填空間からの内容物の注出に伴って減容変形する内層体とを備えた二重容器であって、
    　前記外層体と前記内層体との相互間に、該外層体の中心軸線に沿って延在し、該外層体と該内層体とを部分的に結合させる接着帯を１本のみ設け、
    　該外層体に、該外層体と該内層体との相互間に外気を取り込む外気導入孔を、該接着帯に対して周方向にずれた位置に１つのみ設け、
    　該外層体の内面を、該外気導入孔に面するとともに該内層体の外面に対して分離した分離面と、該分離面に対向するとともに該内層体の外面に対して剥離可能に接着した疑似接着面とで構成してなる二重容器。
  2. 　内容物の注出にあたって前記外層体を傾倒姿勢に変位させるに際し、前記分離面と前記疑似接着面が水平方向両側に位置するように該外層体を導く誘導手段を有する請求項１に記載の二重容器。
  3. 　前記口部に、前記充填空間の内容物を外界に注出させる注出キャップを設け、該注出キャップに、ヒンジを介して連結する蓋体を設け、該ヒンジを、前記分離面と前記疑似接着面が水平方向両側に位置し且つ前記外層体を傾倒姿勢に変位させた状態において、該注出キャップの上方に設けることで前記誘導手段としてなる請求項２に記載の二重容器。
  4. 　前記口部に、該口部の開口を覆う天壁と該天壁から立ち上がる注出筒とを有し該注出筒から内容物を外界に注出させる注出キャップを設け、該注出筒を、前記分離面と前記疑似接着面が水平方向両側に位置し且つ前記外層体を傾倒姿勢に変位させた状態において、下方に位置する部分の長さが他の部分よりも長くなるように設けることで前記誘導手段としてなる請求項２に記載の二重容器。
  5. 　前記口部に、前記充填空間の内容物を外界に注出させる注出キャップを設け、前記注出キャップに、先端を径方向外側に湾曲させたリップをその頂部に有する注出筒を設け、該リップを、前記分離面と前記疑似接着面が水平方向両側に位置し且つ前記外層体を傾倒姿勢に変位させた状態において、該頂部の下方に位置する部分のみに設けることで前記誘導手段としてなる請求項２に記載の二重容器。
  6. 　前記外気導入孔は、前記接着帯に対して周方向に９０度ずれた位置に設けられる請求項１に記載の二重容器。
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