WO2006016679A1 - Can container - Google Patents

Can container Download PDF

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Publication number
WO2006016679A1
WO2006016679A1 PCT/JP2005/014860 JP2005014860W WO2006016679A1 WO 2006016679 A1 WO2006016679 A1 WO 2006016679A1 JP 2005014860 W JP2005014860 W JP 2005014860W WO 2006016679 A1 WO2006016679 A1 WO 2006016679A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
dome
score line
outer peripheral
peripheral edge
Prior art date
Application number
PCT/JP2005/014860
Other languages
French (fr)
Japanese (ja)
Inventor
Yoshihiko Matsukawa
Wataru Hasegawa
Original Assignee
Daiwa Can Company
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 Daiwa Can Company filed Critical Daiwa Can Company
Priority to US11/573,489 priority Critical patent/US20090223956A1/en
Priority to DE602005025651T priority patent/DE602005025651D1/en
Priority to AT05770323T priority patent/ATE493349T1/en
Priority to EP05770323A priority patent/EP1785371B1/en
Publication of WO2006016679A1 publication Critical patent/WO2006016679A1/en
Priority to HK07112395.9A priority patent/HK1103702A1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/14Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of aluminium; constructed of non-magnetic steel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D51/00Closures not otherwise provided for
    • B65D51/16Closures not otherwise provided for with means for venting air or gas
    • B65D51/1633Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element
    • B65D51/1638Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element by means of an element bursting upon a predetermined pressure in the container being exceeded
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D83/00Containers or packages with special means for dispensing contents
    • B65D83/14Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/38Details of the container body
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D83/00Containers or packages with special means for dispensing contents
    • B65D83/14Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/70Pressure relief devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/12Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F17C13/123Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures for gas bottles, cylinders or reservoirs for tank vehicles or for railway tank wagons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01Shape
    • F17C2201/0104Shape cylindrical
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05Size
    • F17C2201/058Size portable (<30 l)
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00Vessel construction, in particular walls or details thereof
    • F17C2203/06Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602Wall structures; Special features thereof
    • F17C2203/0612Wall structures
    • F17C2203/0614Single wall
    • F17C2203/0617Single wall with one layer
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00Vessel construction, in particular walls or details thereof
    • F17C2203/06Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634Materials for walls or layers thereof
    • F17C2203/0636Metals
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00Vessel construction, in particular walls or details thereof
    • F17C2203/06Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/068Special properties of materials for vessel walls
    • F17C2203/069Break point in the wall
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00Purposes of gas storage and gas handling
    • F17C2260/02Improving properties related to fluid or fluid transfer
    • F17C2260/021Avoiding over pressurising
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00Purposes of gas storage and gas handling
    • F17C2260/04Reducing risks and environmental impact
    • F17C2260/042Reducing risk of explosion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00Applications
    • F17C2270/07Applications for household use
    • F17C2270/0718Aerosols

Definitions

  • the present invention relates to a can container such as an aerosol can filled with contents.
  • an aerosol can filled with a propellant which is a high pressure gas
  • a propellant which is a high pressure gas
  • the pressure inside the can container abnormally increases with the thermal expansion of the propellant.
  • the fastening portion between the can barrel and the bottom lid of the can container and the attachment portion between the can barrel and the mountain cap may be destroyed, and the bottom lid and the mountain cap of the can container may be blown away.
  • the internal pressure of the can container exceeds a certain value, it is deformed to form a crack to form a weakened portion that releases the internal pressure.
  • JP-A 4 7- 7 6 6 corresponding U.S. Pat. No. 3 7 8 6 9 6
  • JP-A 4 8-4 5 5 9 1 U.S. Pat. No. 4,005,015) JP-A 4 7- 7 6 6 (corresponding U.S. Pat. No. 3 7 8 6 9 6 7)
  • JP-A 4 8-4 5 5 9 1 U.S. Pat. No. 4,005,015) JP-A 4 7- 7 6 6
  • JP-A-47006 there is a can provided with a large number of score lines in the diameter direction of the upper lid at the portion including the upper end of the metal upper lid (mountain cap) and the metal shell.
  • the container is described.
  • the bottom lid deforms so as to expand before the blowout, and as a result, the score line is broken, and the internal pressure is released.
  • the periphery of the member constituting the bottom of the can container is divided, and the resistance which may be deformed and cracked when the internal pressure of the can container exceeds a certain value.
  • Cans with weak areas are described.
  • a portion to be cut which is cracked only when the bottom portion is inverted outward (the bottom portion protrudes outward of the can container) is provided on the bottom wall.
  • the sealing performance is not stable. Therefore, although it is a can of normal internal pressure, it may cause leakage of contents or propellant from the constriction part, or it may cause vibration during distribution due to damage to the score when molding the convoluted part. The impact may cause risk fracture, and the contents or propellant may leak from the fractured point. Also, if the can container is accidentally dropped, the floor and the clamping portion may come into direct contact, in which case the score line formed in the winding portion is broken due to a drop impact. It will be easier. As a result, there is a possibility that the contents may be released other than at the time of high internal pressure which would cause breakage of the score line.
  • the portion to be cut is formed in the peripheral portion of the curved area at the bottom of the can container. Therefore, when the bottom portion is deformed to reverse by the internal pressure of the can container exceeding a certain value, the vicinity of the center portion of the bottom portion is displaced outward in the axial direction of the can container. The wall surface of the dome does not deform much. Therefore, even if the portion to be cut is formed in the peripheral portion of the curved area at the bottom, if the position is relatively near the center, the portion to be cut may not be broken at the time of inversion of the bottom. Disclosure of the invention
  • the present invention has been made on the background of the above-mentioned circumstances, and when the internal pressure of the can becomes abnormally high, it breaks reliably to release the internal gas, and in other cases, the easily breakable portion which does not break. It is an object of the present invention to provide a can container provided with In order to achieve the above object, according to the present invention, an annular ground portion formed at the lower end of the can container and a dome portion recessed inward of the can container from the inner peripheral surface of the annular ground portion are formed. In the can container being formed, a breakable portion which is broken when the internal pressure of the can container rises abnormally and the dome portion is deformed to project outward of the can container is connected to the annular ground contact portion.
  • the can container is characterized in that it is formed on the outer surface side of the dome portion located in the immediate vicinity of the outer peripheral edge portion of the dome portion.
  • the easily breakable portion may be formed inward in a radial direction from the outer peripheral edge portion of the dome portion and in a predetermined range.
  • the easily breakable portion provided on the outer surface of the dome portion may be formed in a reverse trapezoidal shape having a vertical cross-sectional shape, an inclined side surface that tapers toward the inner surface side from the outer surface side of the dome portion, and a bottom surface connecting the inclined side surfaces.
  • the easy-to-break portion may have a planar shape and a substantially semicircular arc shape, and an end of the easy-to-break portion may extend in a substantially radial direction of the can container.
  • the internal pressure of the can container abnormally rises due to heating or the like, and the outer peripheral edge portion of the dome portion formed on the bottom side of the can container (when the can container is placed on the floor, Starting from the lower end edge of the dome portion connected to the ring-shaped ground portion in direct contact, when the dome portion is inverted and deformed so as to project outward of the can container, the easy breaking portion is broken, In order to discharge the contents inside the container, when the internal pressure rises abnormally, it is possible to degas without partially blowing off the container.
  • the easily breakable portion is formed immediately near the outer peripheral edge of the dome portion having a large degree of deformation when the dome portion is inverted, it is possible to reliably break the easily breakable portion when the dome portion is inverted. it can.
  • This easy-to-break portion is formed on the outer surface side of the dome portion located in the immediate vicinity of the outer peripheral edge portion of the dome portion, so that it breaks into an annular grounding portion that easily contacts the ground directly when the can is accidentally dropped. Compared with the case where the easy part is formed, it is possible to prevent the occurrence of an unexpected break due to a drop impact.
  • the easily breakable portion is positioned radially inward from the outer peripheral edge portion of the dome portion and within a predetermined range, the easily breakable portion can be broken more reliably. it can.
  • the vertical cross-sectional shape of the easy-to-break portion has an inverted trapezoidal shape, and a pair of inclined side surfaces of the easy-to-break portion and a bottom surface connecting the inclined side surfaces are formed. Even if the internal pressure rises to a certain extent due to an impact etc. and the dome part bulges a little, a gap is generated between the inclined side surfaces by the amount of the bottom surface. Therefore, there is no chance that the easy-to-break part will break inadvertently.
  • the plane shape of the easy-to-break portion is substantially semi-circular and the end portion extends in the substantially radial direction of the can container, the break occurs when the dome portion is reversed.
  • the easy part is broken, the semi-disc-like part surrounded by the broken easy part is more likely to rise outward than in the case where the easy broken part is formed in a straight line.
  • the pressure inside the can container can be released quickly.
  • the end of the easily breakable part is positioned next to the circumferential direction. Since the crack in the dome portion does not reach the other easy-to-break portion located next to the circumferential direction because the direction of the easy-to-break portion is not directed, the-portion of the dome portion is not broken and separated.
  • At least a part of the easily breakable part be located within a range of 3 mm or less from the outer peripheral edge of the dome part. Moreover, it is preferable to set the width
  • FIG. 1 is a bottom view showing the can container of the present invention.
  • FIG. 2 is a view showing the position of the breakable portion in the can container of FIG.
  • FIG. 3 is a longitudinal sectional view showing a dome portion in the can container of the present invention.
  • FIG. 4 is an enlarged view of the dome portion of FIG. 3;
  • FIG. 5 is an enlarged view showing a portion V of FIG.
  • FIG. 6 is a longitudinal sectional view showing the can container of the present invention.
  • FIG. 7 is a front view showing the can container of the present invention.
  • FIG. 8 is a bottom view showing another embodiment of the can container of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIGS. 6 and 7 show cans such as aerosol cans, etc., in which propellants etc., which are high pressure gas, are filled inside metal containers.
  • This can container (main body) 1 is provided with a cylindrical metal can body (body) 2.
  • An aerosol valve member (not shown) for injecting the contents is attached to one end of the can body 2 and a disc-shaped bottom lid (can lid) 3 made of metal is fixedly wound and fixed to the other end. It is done.
  • the contents to be filled are both cosmetics, insecticides, drugs, detergents, paints, lubricants, foods, etc. and high-pressure gas as a propellant.
  • the metal material for the can body and can lid in the can container of the present invention is mainly made of a metal material that has been rolled and then subjected to an appropriate surface treatment and / or plating if necessary. In any case, one having a resin film formed on the surface in contact with the contents can be used.
  • a steel plate material such as an aluminum plate material made of pure aluminum or aluminum alloy, a steel plate treated with electrolytic chromic acid, a nickel plated steel plate, a tin plated steel plate or the like can be used.
  • paints such as epoxy phenol resin, epoxy resin, vinyl chloride resin, etc., thermoplastic resin such as polyethylene, polypropylene, polyester, polyamide, ionomer, etc.
  • the resin film etc. which are comprised from 1 type, or 2 or more types of can be used.
  • the can body 2 is formed by drawing and ironing a thin metal sheet into a seamless can, and applying a drawing process to the bottom side of the seamless can to form a bottomed cylindrical part 2 A having a diameter smaller than that of the can body 2 A And trim the open end side of the can body 2 and the tip end side of the small-diameter bottomed cylindrical portion 2A, and further attach the air release / rev member to the bottomed cylindrical portion 2A side.
  • An opening curl portion 2B is formed, and a flange portion 2C for winding and closing the bottom lid 3 is formed on the open end side of the can body 2.
  • the bottom cover 3 is a metal plate material on which a score line L to be the easily breakable portion 5 is formed, and then the metal plate material is punched into a disk shape and subjected to press forming.
  • the bottom cover 3 has a dome portion 3A having an arc-like longitudinal cross section which is recessed inward of the can container 1 when winding and tightening the can body 2 and a flange portion 3 for winding and fixing to the can body 2.
  • the can container 1 is located at the outermost end of the dome portion 3A in the radial direction and on the outer surface side of the can container 1 near the outer peripheral portion 3C connected to the flange portion 3B.
  • an easy-to-break part 5 which is broken when is deformed, four semicircular arc-shaped score lines L having a planar shape are formed at equal intervals in the circumferential direction.
  • both ends of the score line L are directed radially inward of the bottom lid 3, and a portion of the score line located at the outermost end in the radial direction of the bottom lid 3 is a dome portion It is located immediately near the outer peripheral edge 3C of 3A, and is located within about 3 mm radially inward from the outer peripheral edge 3C of the dome 3A.
  • the two-dot chain line M shown in FIG. 2 is a view showing a state in which the score line L is in contact with the outer peripheral edge 3 C of the dome portion 3 A.
  • the longitudinal cross-sectional shape of the score line L shown in FIGS. 3 to 5 has a pair of inclined side surfaces 5 A that become tapered from the outer surface side to the inner surface side of the bottom lid 3 (can vessel 1).
  • a bottom 5 B substantially parallel to the bottom cover 3 connecting the two inclined side surfaces 5 A is formed at the lower end of the It has an inverted trapezoidal shape (see section V).
  • the thickness of the dome portion 3A of the bottom lid 3 is 0.3 mm
  • the remaining thickness of the score line L portion is 0.15 mm
  • the longitudinal cross-sectional shape of the bottom surface 5B The width of is 0.60 mm
  • the opening angle of the pair of inclined side surfaces 5A is 50 °.
  • the number of the score lines L is about 2 to 10 at approximately equal intervals in the circumferential direction of the bottom lid 3 within the above range, because the pressure resistance of the bottom lid 3 is reduced if the number is too large. .
  • a tightening portion 3D obtained by winding and tightening corresponds to the annular grounding portion of the present invention.
  • the tightening portion 3D includes an annular ground surface directly contacting the floor, a table or the like, and an annular inner peripheral surface 3E and an outer peripheral surface 3F extending substantially perpendicularly from the peripheral edge of the ground surface.
  • the upper end of the inner peripheral wall of the wound portion 3D and the outer peripheral edge 3C of the dome portion 3A (the lower end of the dome portion 3A) are connected.
  • each score line L inward in the radial direction of each score line L formed in the immediate vicinity of the outer peripheral edge 3 C of the dome 3 A You may form the subscore line 6 whose residual thickness is thicker than the line L.
  • stress concentration on the score line L at the time of molding the score line can be alleviated, and partial thinning of the score line L or It can prevent damage such as cracking.
  • the damage of the score line is increased due to the forming of the dome portion 3A.
  • the resin coating covering the inner surface may be broken or a crack may occur in the score line, but such a situation can be prevented by forming the sub-score line 6.
  • the dome portion 3A when the internal pressure of the can container 1 abnormally rises due to heating or the like, the dome portion 3A is inverted with the outer peripheral portion 3C of the dome portion 3A of the bottom lid 3 as a base point. , Transforms so as to project outward of can 1. At this time, any score line L formed in the immediate vicinity of the outer peripheral edge portion 3 C of the dome portion 3 A is broken, and the contents (not shown) inside the can container 1 are released. There is no possibility that the bottom cover 3 will be blown off due to destruction of the clamping part 3D between the part 2 and the bottom cover 3.
  • the central portion of the dome portion 3A is displaced outward (downward) only in the axial direction of the can container 1, and the wall surface of the dome portion 3A is not deformed too much.
  • the wall surface immediately adjacent to the outer peripheral edge portion 3 C of the dome portion 3 A is largely deformed so as to be pulled radially inward of the first rib portion 3 A and axially outward of the can container 1.
  • each score is not Since the line L is formed in the immediate vicinity of the outer peripheral edge 3 C of the dome portion 3 A, it is possible to reliably break either score line L when the dome portion 3 A is inverted.
  • each score line L is formed in the immediate vicinity of the outer peripheral edge portion 3 C of the dome portion 3 A, it is an annular grounding portion that easily contacts the ground directly when the can is dropped accidentally. Compared with the case where a score line is formed on the part 3D, it is possible to prevent an unexpected breakage due to a drop impact. Furthermore, if the vertical cross-sectional shape of the score line L is an inverted trapezoidal shape and the bottom surface 5 B connecting the inclined side surfaces 5 A is formed as in the present embodiment, the can container 1 can be heated or shocked. Even if the internal pressure rises to some extent and the dome 3A bulges outward somewhat, the score line L does not break unexpectedly.
  • the bottom lid 3 is deformed due to the increase of the internal pressure of the can container 1, and when inverted, the inclined side surfaces 5A and 5A of the score line L abut each other, causing a crack on the bottom surface 5B.
  • the inclined side surfaces 5A and 5A of the score line L abut each other, causing a crack on the bottom surface 5B.
  • the score line L has an inverted trapezoidal cross-section and the bottom surface 5 B
  • the internal pressure of the can container 1 rises to some extent and the dome portion 3 A bulges outward.
  • a gap can be formed between the two inclined side surfaces 5A and 5A by the bottom surface 5B. Therefore, both inclined side surfaces 5 A and 5 A do not immediately come into contact with each other. Even a small pressure rise will not cause the score line L to break unexpectedly. If the width of the vertical cross-sectional shape of the bottom surface 5 B is too narrow, the score line L is broken due to some deformation of the bottom lid 3 as described above, but if the width is too wide, the bottom lid 3 is inverted.
  • each score line L becomes difficult to break.
  • the planar shape of each score line L is a semicircular arc, and the end of each score line extends in the substantially radial direction of the can container 1, for example, When the score line L is broken at the time of inversion of the dome portion 3 A compared to when the score line is formed in a straight line, the semi-disk-like portion surrounded by the broken score line L goes outward. It is easy to rise up. Therefore, the pressure inside the can container 1 can be released quickly.
  • each score line L extends substantially in the radial direction of the can container 1
  • the fracture of the score line L in which the fracture has occurred due to the internal pressure of the can container 1 is the score line L
  • the score line L Even if the bottom lid 3 is cracked, it does not break apart or separate a part of the bottom lid 3 even if it extends up to the extension of the end of the bottom portion 3.
  • the score line L when the end of the score line L extends in the circumferential direction, the score line L is broken, the break occurs on the extension line of the end group of the score line L, and the bottom lid 3 has a crack. If it occurs, the crack may be connected to another score line L located next to the circumferential direction, and part of the bottom cover 3 may break apart in a disc shape.
  • the can container of the present invention since the end of the score line L extends substantially in the radial direction of the can container 1, the circumferential direction on the extension of the end of the score line L There is no score line located next to. Therefore, breakage of the score line L occurs up to the extension of the end, and even when the bottom lid is cracked, a part of the bottom lid is not broken apart.
  • the can container of the present invention is not limited to the one in which the bottom lid 3 is wound and tightened on the can barrel 2 but may be one in which the can barrel and the bottom lid are integrally formed from one member.
  • the container itself may be not only an aerosol can but also a potl type can having a screw formed at one end of the can body 2.
  • the present invention can be used in the industrial field of manufacturing aerosol cans and cans therefor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Table Devices Or Equipment (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Closures For Containers (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

A can container, wherein an easily breakable part broken when an internal pressure in the can container abnormally rises and the can container is deformed so that a dome part is projected to the outside of the can container is formed on the outer surface side of the dome part positioned just near the outer peripheral edge part of the dome part continued to caulking parts. For example, when the internal pressure in the can container is abnormally raised by heating, and the dome part is inverted from the outer peripheral edge part of the dome part of a bottom cover and deformed so as to be projected to the outside of the can container, the easily breakable part is broken, and the contents in the can container is released from the can container. Thus, even if the internal pressure abnormally rises, degassing can be performed without allowing a part of the can container to be blown off.

Description

明 細 書  Specification
Φ 器 技術分野 器 device technical field
本発明は、 内容物を充填するエアゾール缶などの缶容器に関するものである。 背景技術  The present invention relates to a can container such as an aerosol can filled with contents. Background art
従来、 高圧ガスである噴射剤を充填したエアゾール缶が使用されている。 この エアゾール缶は、 火中に投入されたり、 高温下に長時間放置されたりした場合、 噴射剤の熱膨張に伴って、 缶容器 (容器) 内部の圧力が異常に上昇する。 その場 合、 缶容器の缶胴と底蓋との巻締部や、 缶胴とマウンテンキャップとの取付部が 破壊されて、 缶容器の底蓋やマウンテンキャップが吹き飛ばされるおそれがある 。 このような圧力の上昇により缶容器の爆発を防止するために、 缶容器の内圧が 一定値を超えた際に、 変形して亀裂を生じることにより内圧を解放する弱化部を 形成することが行われている。 この種の缶容器の一例が特開昭 4 7— 7 6 8 6号 公報 (対応米国特許第 3 7 8 6 9 6 7号) や特開昭 4 8— 4 9 5 9 1号公報 (対 応米国特許第 4 0 0 3 5 0 5号) に記載されている。  Conventionally, an aerosol can filled with a propellant, which is a high pressure gas, is used. When this aerosol can is thrown into a fire or left for a long time under high temperature, the pressure inside the can container (container) abnormally increases with the thermal expansion of the propellant. In that case, there is a risk that the fastening portion between the can barrel and the bottom lid of the can container and the attachment portion between the can barrel and the mountain cap may be destroyed, and the bottom lid and the mountain cap of the can container may be blown away. In order to prevent the explosion of the can container due to the increase in pressure, when the internal pressure of the can container exceeds a certain value, it is deformed to form a crack to form a weakened portion that releases the internal pressure. It is Examples of this type of can container are disclosed in JP-A 4 7- 7 6 6 (corresponding U.S. Pat. No. 3 7 8 6 9 6 7) and JP-A 4 8-4 5 5 9 1 U.S. Pat. No. 4,005,015).
特開昭 4 7— 7 6 8 6号公報には、 金属製上蓋 (マウンテンキャップ) と金属 胴との巻締部上端を含む部分に、 上蓋の直径方向に、 多数の刻み線を設けた缶容 器が記載されている。 この缶容器では、 その内圧が増加した場合、 底蓋が吹き飛 ぷ前に、 上蓋が膨出するように変形し、 その結果、 前記刻み線が破断され、 内部 の圧力が放出される。  According to JP-A-47006, there is a can provided with a large number of score lines in the diameter direction of the upper lid at the portion including the upper end of the metal upper lid (mountain cap) and the metal shell. The container is described. In this can container, when the internal pressure increases, the bottom lid deforms so as to expand before the blowout, and as a result, the score line is broken, and the internal pressure is released.
特開昭 4 8— 4 9 5 9 1号公報には、 缶容器の底部を構成する部材の周辺を分 割し、 かつ缶容器の内圧が一定値を超えた際に変形し亀裂し得る抵抗力の弱い区 域部を備えた缶容器が記載されている。 この缶容器においては、 底部が外方へ反 転 (底部が缶容器の外方へ突出) する際にだけ亀裂が生じる切開予定部が底部の 壁に設けられている。  According to Japanese Patent Application Laid-Open No. 4 8 4 9 5 1 1, the periphery of the member constituting the bottom of the can container is divided, and the resistance which may be deformed and cracked when the internal pressure of the can container exceeds a certain value. Cans with weak areas are described. In this can container, a portion to be cut which is cracked only when the bottom portion is inverted outward (the bottom portion protrudes outward of the can container) is provided on the bottom wall.
しかしながら、 特開昭 4フー 7 6 8 6号公報に記載された発明の場合、 金属製 缶容器の卷締部に刻み線が設けられているため、 巻締密封性が安定しない。 その ため、 正常な内圧の缶であるのにも関わらず、 巻締部から内容物又は噴射剤の漏 洩が発生したり、 巻締部の成形時に発生するスコア一ダメージにより、 流通時の 振動衝撃によリスコァ一が破断し、 さらにはその破断した箇所から内容物又は噴 射剤が漏洩することがある。 また、 缶容器を誤って落下させてしまった場合には 、 床と卷締部とが直接接触する可能性があり、 その場合、 巻締部に形成された刻 み線が落下衝撃により破断しやすくなる。 その結果、 本来刻み線の破断が生じる ような高内圧時以外にも内容物が放出されてしまう可能性がある。 However, in the case of the invention described in Japanese Patent Application Laid-Open No. 4 No. 7 6 6 As the score line is provided at the clamping part of the can container, the sealing performance is not stable. Therefore, although it is a can of normal internal pressure, it may cause leakage of contents or propellant from the constriction part, or it may cause vibration during distribution due to damage to the score when molding the convoluted part. The impact may cause risk fracture, and the contents or propellant may leak from the fractured point. Also, if the can container is accidentally dropped, the floor and the clamping portion may come into direct contact, in which case the score line formed in the winding portion is broken due to a drop impact. It will be easier. As a result, there is a possibility that the contents may be released other than at the time of high internal pressure which would cause breakage of the score line.
また、 特開昭 4 8— 4 9 5 9 1号公報に記載された発明では、 その切開予定部 が、 缶容器の底部の湾曲区域の周辺部分に形成されている。 したがって、 缶容器 の内圧が一定値を超えることにより、 底部が、 反転するように変形した場合、 底 部の中央部分付近が、 缶容器の軸線方向外方に変位するものの、 その中央部にあ るドーム部の壁面自体は余り変形しない。 そのため、 切開予定部を底部の湾曲区 域の周辺部分に形成しても、 その位置が比較的中央寄りであると、 底部の反転時 に切開予定部が破断しないおそれがある。 発明の開示  Further, in the invention described in Japanese Patent Application Laid-Open No. 4 8 4 5 9 1 1, the portion to be cut is formed in the peripheral portion of the curved area at the bottom of the can container. Therefore, when the bottom portion is deformed to reverse by the internal pressure of the can container exceeding a certain value, the vicinity of the center portion of the bottom portion is displaced outward in the axial direction of the can container. The wall surface of the dome does not deform much. Therefore, even if the portion to be cut is formed in the peripheral portion of the curved area at the bottom, if the position is relatively near the center, the portion to be cut may not be broken at the time of inversion of the bottom. Disclosure of the invention
この発明は上記の事情を背景としてなされたものであり、 缶内圧が異常に高く なったときに確実に破断して内部のガスを放出し、 それ以外の場合では破断する ことのない破断容易部を備えた缶容器を提供することを目的とするものである。 上記の目的を達成するために、 この発明は、 缶容器の下端に形成された環状接 地部と、 その環状接地部の内周面から缶容器の内方に凹んでいるドーム部とが形 成されている缶容器において、 缶容器の内圧が異常に上昇して前記ドーム部が缶 容器の外方に突出するように変形したときに破断される破断容易部が、 前記環状 接地部と連なる前記ドーム部の外周縁部の直ぐ近くに位置する前記ドーム部の外 面側に形成されていることを特徴とする缶容器である。  The present invention has been made on the background of the above-mentioned circumstances, and when the internal pressure of the can becomes abnormally high, it breaks reliably to release the internal gas, and in other cases, the easily breakable portion which does not break. It is an object of the present invention to provide a can container provided with In order to achieve the above object, according to the present invention, an annular ground portion formed at the lower end of the can container and a dome portion recessed inward of the can container from the inner peripheral surface of the annular ground portion are formed. In the can container being formed, a breakable portion which is broken when the internal pressure of the can container rises abnormally and the dome portion is deformed to project outward of the can container is connected to the annular ground contact portion. The can container is characterized in that it is formed on the outer surface side of the dome portion located in the immediate vicinity of the outer peripheral edge portion of the dome portion.
また、 この発明では、 前記破断容易部が、 前記ドーム部の外周縁部からその半 径方向に向かって内方にかつ所定の範囲に形成されていてよい。  In the present invention, the easily breakable portion may be formed inward in a radial direction from the outer peripheral edge portion of the dome portion and in a predetermined range.
さらに、 この発明は、 前記ドーム部の外面部に設けられている前記破断容易部 が、 縦断面形状で、 前記ドーム部の外面側から内面側に近づくに従って先細りと なる傾斜側面と、 その傾斜側面を繋ぐ底面とを有する逆台形状となるスコア線に よって構成されていてよい。 Furthermore, according to the present invention, the easily breakable portion provided on the outer surface of the dome portion The score line may be formed in a reverse trapezoidal shape having a vertical cross-sectional shape, an inclined side surface that tapers toward the inner surface side from the outer surface side of the dome portion, and a bottom surface connecting the inclined side surfaces.
そして、 この発明は、 前記破断容易部が、 平面形状で略半円弧状であり、 その 端部が缶容器の略半径方向に向けて延在していてよい。  And in the present invention, the easy-to-break portion may have a planar shape and a substantially semicircular arc shape, and an end of the easy-to-break portion may extend in a substantially radial direction of the can container.
したがって、 この発明によれば、 加熱などにより缶容器の内圧が異常に上昇し 、 缶容器の底部側に形成されたドーム部の外周縁部 (缶容器を床に正置した場合 に、 床と直接接触する環状の接地部と連なるドーム部の下端縁) を基点とし、 ド ーム部が反転し、 缶容器の外方に突出するように変形したときに、 破断容易部が 破断し、 缶容器の内部の内容物を放出するため、 内圧が異常に上昇した時に缶容 器の一部が吹き飛ばされることなくガス抜きができる。 しかも、 破断容易部が、 ドーム部が反転する際に変形度合いの大きいドーム部の外周縁部の直ぐ近くに形 成されているため、 ドーム部の反転時に確実に破断容易部を破断させることがで きる。 この破断容易部は、 ドーム部の外周縁部の直ぐ近くに位置するドーム部の 外面側に形成されることにより、 缶を誤って落下させたときに直接地面と接触し 易い環状接地部に破断容易部が形成されている場合に比べて、 落下衝撃による不 用意な破断が生じるのを防止できる。  Therefore, according to the present invention, the internal pressure of the can container abnormally rises due to heating or the like, and the outer peripheral edge portion of the dome portion formed on the bottom side of the can container (when the can container is placed on the floor, Starting from the lower end edge of the dome portion connected to the ring-shaped ground portion in direct contact, when the dome portion is inverted and deformed so as to project outward of the can container, the easy breaking portion is broken, In order to discharge the contents inside the container, when the internal pressure rises abnormally, it is possible to degas without partially blowing off the container. In addition, since the easily breakable portion is formed immediately near the outer peripheral edge of the dome portion having a large degree of deformation when the dome portion is inverted, it is possible to reliably break the easily breakable portion when the dome portion is inverted. it can. This easy-to-break portion is formed on the outer surface side of the dome portion located in the immediate vicinity of the outer peripheral edge portion of the dome portion, so that it breaks into an annular grounding portion that easily contacts the ground directly when the can is accidentally dropped. Compared with the case where the easy part is formed, it is possible to prevent the occurrence of an unexpected break due to a drop impact.
また、 この発明によれば、 破断容易部が、 ドーム部の外周縁部からその半径方 向内方にかつ所定の範囲に位置するために、 よリ確実に破断容易部を破断するこ とができる。  Further, according to the present invention, since the easily breakable portion is positioned radially inward from the outer peripheral edge portion of the dome portion and within a predetermined range, the easily breakable portion can be broken more reliably. it can.
さらに、 この発明によれば、 破断容易部の縦断面形状が逆台形状をしており、 破断容易部の一対の傾斜側面と、 その傾斜側面同士を繋ぐ底面が形成されている ため、 加熱や衝撃等で内圧がある程度上昇して、 多少ドーム部が外方へ膨らんで も、 その底面のある分だけ傾斜側面間に隙間が生じる。 そのため、 不用意に破断 容易部が破断するようなことはない。  Furthermore, according to the present invention, since the vertical cross-sectional shape of the easy-to-break portion has an inverted trapezoidal shape, and a pair of inclined side surfaces of the easy-to-break portion and a bottom surface connecting the inclined side surfaces are formed. Even if the internal pressure rises to a certain extent due to an impact etc. and the dome part bulges a little, a gap is generated between the inclined side surfaces by the amount of the bottom surface. Therefore, there is no chance that the easy-to-break part will break inadvertently.
そして、 この発明によれば、 破断容易部の平面形状が略半円弧状であり、 その 端部が缶容器の略半径方向に向けて延在しているため、 ドーム部の反転時に、 破 断容易部が破断した際に、 直線状に破断容易部が形成されている場合に比べて、 破断した破断容易部で囲まれた半円板状部分が、 外方へ浮き上がり易いため、 迅 速に缶容器内部の圧力を開放できる。 さらに、 破断容易部の破断が、 破断容易部 の端部の延長線上にまで生じて、 ドーム部に亀裂が生じた場合でも、 破断容易部 の端部が、 円周方向の隣に位置する他の破断容易部の方向を向いていないため、 ドーム部の亀裂が円周方向の隣に位置する他の破断容易部に達して、 ドーム部の —部が破断分離されるようなことはない。 And, according to the present invention, since the plane shape of the easy-to-break portion is substantially semi-circular and the end portion extends in the substantially radial direction of the can container, the break occurs when the dome portion is reversed. When the easy part is broken, the semi-disc-like part surrounded by the broken easy part is more likely to rise outward than in the case where the easy broken part is formed in a straight line. The pressure inside the can container can be released quickly. Furthermore, even if the fracture of the easily breakable part occurs on the extension of the end of the easily breakable part and a crack occurs in the dome part, the end of the easily breakable part is positioned next to the circumferential direction. Since the crack in the dome portion does not reach the other easy-to-break portion located next to the circumferential direction because the direction of the easy-to-break portion is not directed, the-portion of the dome portion is not broken and separated.
さらに、 この発明では、 破断容易部の少なくとも一部が、 ドーム部の外周縁部 から 3 m m以内の範囲に位置するように構成することが好ましい。 また、 スコア 線の底面の幅を 0 . 0 3 m m〜0 . 1 m mに設定することが好ましい。 図面の簡単な説明  Furthermore, in the present invention, it is preferable that at least a part of the easily breakable part be located within a range of 3 mm or less from the outer peripheral edge of the dome part. Moreover, it is preferable to set the width | variety of the base of a score line to 0.30 mm-0.1 mm. Brief description of the drawings
図 1は、 本発明の缶容器を示す底面図である。  FIG. 1 is a bottom view showing the can container of the present invention.
図 2は、 図 1の缶容器における破断容易部の位置を示す図である。  FIG. 2 is a view showing the position of the breakable portion in the can container of FIG.
図 3は、 本発明の缶容器におけるドーム部を示す縦断面図である。  FIG. 3 is a longitudinal sectional view showing a dome portion in the can container of the present invention.
図 4は、 図 3のドーム部を示す拡大図である。  FIG. 4 is an enlarged view of the dome portion of FIG. 3;
図 5は、 図 4の V部を示す拡大図である。  FIG. 5 is an enlarged view showing a portion V of FIG.
図 6は、 本発明の缶容器を示す縦断面図である。  FIG. 6 is a longitudinal sectional view showing the can container of the present invention.
図 7は、 本発明の缶容器を示す正面図である。  FIG. 7 is a front view showing the can container of the present invention.
図 8は、 本発明の缶容器の他の実施形態を示す底面図である。 発明を実施するための最良の形態  FIG. 8 is a bottom view showing another embodiment of the can container of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
以下、 本発明の実施の形態について図面を用いて説明する。 図 6 , 7には、 金 属製の容器内部に高圧ガスである噴射剤などを充填するエアゾール缶などの缶容 器が示されている。 この缶容器 (本体) 1は円筒状の金属製の缶胴部 (胴部) 2 を備えている。 この缶胴部 2の一端には内容物噴射用のエアゾール用バルブ部材 (図示せず) が取り付けられ、 他端には円板状でかつ金属製の底蓋 (缶蓋) 3が 巻き締め固着されている。 なお、 充填される内容物は、 化粧品、 殺虫剤、 薬剤、 洗浄剤、 塗料、 潤滑剤、 食品などと、 噴射剤としての高圧ガスとの両方である。 本発明の缶容器における缶胴および缶蓋用の金属素材としては、 圧延されてか ら必要に応じて適宜の表面処理ゃメツキが施された金属材を主材として、 少なく とも内容物と接する面に樹脂被膜を形成したものが使用できる。 また、 その金属 板としては、 例えば、 純アルミニウムやアルミニウム合金によるアルミ板材や、 電解クロム酸処理鋼板、 ニッケルメツキ鋼板、 錫メツキ鋼板等のような鋼板材が 使用できる。 さらに、 樹脂被膜としては、 耐食性や加工性等の観点から、 ェポキ シ一フエノール樹脂、 エポキシーァクリル樹脂、 塩化ビニル系樹脂等の塗料や、 ポリエチレン、 ポリプロピレン、 ポリエステル、 ポリアミド、 アイオノマー等の 熱可塑性樹脂の 1種又は 2種以上から構成される樹脂フィルム等が使用できる。 缶胴部 2は、 金属薄板を絞りしごき加工してシームレス缶に成形し、 そのシー ムレス缶の底部側に絞リ加工を施すことにより、 缶胴部 2よりも小径の有底円筒 部 2 Aを成形し、 缶胴部 2の開口端側と小径の有底円筒部 2 Aの先端側とをトリ ミングし、 さらに有底円筒部 2 A側にエアゾ一ル用/ レブ部材を取リ付けるため の開口カール部 2 Bを成形し、 缶胴部 2の開口端側に、 底蓋 3を巻き締めるため のフランジ部 2 Cを成形したものである。 また、 底蓋 3は、 金属板材に破断容易 部 5となるスコア線 Lを形成した後、 その金属板材を円板状に打ち抜き、 プレス 成形を施したものである。 この底蓋 3は、 缶胴部 2に巻き締める際に缶容器 1の 内方に凹むような縦断面円弧状のドーム部 3 Aと、 缶胴部 2に巻き締め固着する ためのフランジ部 3 Bとを有する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figures 6 and 7 show cans such as aerosol cans, etc., in which propellants etc., which are high pressure gas, are filled inside metal containers. This can container (main body) 1 is provided with a cylindrical metal can body (body) 2. An aerosol valve member (not shown) for injecting the contents is attached to one end of the can body 2 and a disc-shaped bottom lid (can lid) 3 made of metal is fixedly wound and fixed to the other end. It is done. The contents to be filled are both cosmetics, insecticides, drugs, detergents, paints, lubricants, foods, etc. and high-pressure gas as a propellant. The metal material for the can body and can lid in the can container of the present invention is mainly made of a metal material that has been rolled and then subjected to an appropriate surface treatment and / or plating if necessary. In any case, one having a resin film formed on the surface in contact with the contents can be used. Further, as the metal plate, for example, a steel plate material such as an aluminum plate material made of pure aluminum or aluminum alloy, a steel plate treated with electrolytic chromic acid, a nickel plated steel plate, a tin plated steel plate or the like can be used. Furthermore, as the resin film, from the viewpoint of corrosion resistance, processability, etc., paints such as epoxy phenol resin, epoxy resin, vinyl chloride resin, etc., thermoplastic resin such as polyethylene, polypropylene, polyester, polyamide, ionomer, etc. The resin film etc. which are comprised from 1 type, or 2 or more types of can be used. The can body 2 is formed by drawing and ironing a thin metal sheet into a seamless can, and applying a drawing process to the bottom side of the seamless can to form a bottomed cylindrical part 2 A having a diameter smaller than that of the can body 2 A And trim the open end side of the can body 2 and the tip end side of the small-diameter bottomed cylindrical portion 2A, and further attach the air release / rev member to the bottomed cylindrical portion 2A side. An opening curl portion 2B is formed, and a flange portion 2C for winding and closing the bottom lid 3 is formed on the open end side of the can body 2. Further, the bottom cover 3 is a metal plate material on which a score line L to be the easily breakable portion 5 is formed, and then the metal plate material is punched into a disk shape and subjected to press forming. The bottom cover 3 has a dome portion 3A having an arc-like longitudinal cross section which is recessed inward of the can container 1 when winding and tightening the can body 2 and a flange portion 3 for winding and fixing to the can body 2. And B.
さらに、 図 1に示すように、 ドーム部 3 Aの半径方向の最外端部分に位置し、 フランジ部 3 Bと連なる外周縁部 3 Cの近傍の缶容器 1外面側に、 ドーム部 3 A が変形したときに破断される破断容易部 5として、 平面形状で半円弧状のスコア 線 Lが円周方向に等間隔に 4箇所形成されている。 図 1および図 2では、 スコア 線 Lの両端部は、 底蓋 3の半径方向内方を向いており、 底蓋 3の半径方向で最外 端に位置するスコア線しの部分は、 ドーム部 3 Aの外周縁部 3 Cの直ぐ近くに位 置し、 ドーム部 3 Aの外周縁部 3 Cから半径方向内方に約 3 m m以内の範囲に位 置している。 なお、 図 2に示す 2点鎖線 Mは、 スコア線 Lがドーム部 3 Aの外周 縁部 3 Cに接触した状態を示す図である。  Furthermore, as shown in FIG. 1, the can container 1 is located at the outermost end of the dome portion 3A in the radial direction and on the outer surface side of the can container 1 near the outer peripheral portion 3C connected to the flange portion 3B. As an easy-to-break part 5 which is broken when is deformed, four semicircular arc-shaped score lines L having a planar shape are formed at equal intervals in the circumferential direction. In FIGS. 1 and 2, both ends of the score line L are directed radially inward of the bottom lid 3, and a portion of the score line located at the outermost end in the radial direction of the bottom lid 3 is a dome portion It is located immediately near the outer peripheral edge 3C of 3A, and is located within about 3 mm radially inward from the outer peripheral edge 3C of the dome 3A. The two-dot chain line M shown in FIG. 2 is a view showing a state in which the score line L is in contact with the outer peripheral edge 3 C of the dome portion 3 A.
図 3〜 5に示すスコア線 Lにおける縦断面形状は、 底蓋 3 (缶容器 1 ) の外面 側から内面側に近づくに従って先細りとなる一対の傾斜側面 5 Aを有し、 傾斜側 面 5 Aの下端には、 両傾斜側面 5 Aを繋ぐ底蓋 3に略平行な底面 5 Bが形成され た逆台形状 (V部参照) となっている。 なお、 本実施例では、 底蓋 3のドーム部 3 Aの板厚が 0 . 3 m mであり、 スコア線 L部分の残厚は 0 . 1 5 m mであり、 その底面 5 Bの縦断面形状の幅は、 0 . 0 6 m mであり、 一対の傾斜側面 5 Aの なす開き角度は 5 0 ° である。 また、 スコア線 Lの本数は、 多すぎると底蓋 3の 耐圧強度が低下するため、 上記範囲内で底蓋 3の円周方向に略等間隔に 2〜 1 0 本程度であることが好ましい。 The longitudinal cross-sectional shape of the score line L shown in FIGS. 3 to 5 has a pair of inclined side surfaces 5 A that become tapered from the outer surface side to the inner surface side of the bottom lid 3 (can vessel 1). A bottom 5 B substantially parallel to the bottom cover 3 connecting the two inclined side surfaces 5 A is formed at the lower end of the It has an inverted trapezoidal shape (see section V). In the present embodiment, the thickness of the dome portion 3A of the bottom lid 3 is 0.3 mm, the remaining thickness of the score line L portion is 0.15 mm, and the longitudinal cross-sectional shape of the bottom surface 5B. The width of is 0.60 mm, and the opening angle of the pair of inclined side surfaces 5A is 50 °. In addition, it is preferable that the number of the score lines L is about 2 to 10 at approximately equal intervals in the circumferential direction of the bottom lid 3 within the above range, because the pressure resistance of the bottom lid 3 is reduced if the number is too large. .
また、 図 6に示すように、 上記缶胴部 2と底蓋 3とを巻き締めることで本発明 の缶容器となり、 この缶胴部 2 (フランジ部 2 C ) と底蓋 3 (フランジ部 3 B ) とを巻き締めした巻締部 3 Dが、 本発明の環状接地部に相当する。 この巻締部 3 Dは、 床やテーブル等の上に直接接触する環状の接地面と、 その接地面の周縁部 から略垂直に延びる環状の内周面 3 Eと外周面 3 Fとで構成されており、 巻締部 3 Dの内周壁の上端とドーム部 3 Aの外周縁部 3 C (ドーム部 3 Aの下端) とが 接続されている。  Further, as shown in FIG. 6, by winding and tightening the can body 2 and the bottom lid 3, the can container of the present invention can be obtained, and the can body 2 (flange 2 C) and the bottom lid 3 (flange 3) B) a tightening portion 3D obtained by winding and tightening corresponds to the annular grounding portion of the present invention. The tightening portion 3D includes an annular ground surface directly contacting the floor, a table or the like, and an annular inner peripheral surface 3E and an outer peripheral surface 3F extending substantially perpendicularly from the peripheral edge of the ground surface. The upper end of the inner peripheral wall of the wound portion 3D and the outer peripheral edge 3C of the dome portion 3A (the lower end of the dome portion 3A) are connected.
また、 本発明の缶容器の他の実施形態として、 図 8のように、 ドーム部 3 Aの 外周縁部 3 Cの直ぐ近くに形成された各スコア線 Lの半径方向内方に、 各スコア 線 Lよりも残厚の厚い副スコア線 6を形成しても良い。 この場合、 スコア線しと 同時に副スコア線 6を成形することによリ、 スコア線の成形時におけるスコア線 Lへの応力集中を緩和することができ、 スコア線 Lの部分的な薄肉化やクラック の発生などの損傷を防ぐことができる。 特に、 スコア線の成形後に、 ドーム部 3 Aを成形する場合は、 スコア線の成形時にスコア線が損傷していると、 ドーム部 3 Aの成形により、 スコア線の損傷が増し、 スコア線の内面を覆う樹脂被膜が破 壊されたり、 スコア線に割れが発生したりする可能性があるが、 副スコア線 6を 形成することにより、 このような事態を防ぐことができる。  In another embodiment of the can container of the present invention, as shown in FIG. 8, each score line L inward in the radial direction of each score line L formed in the immediate vicinity of the outer peripheral edge 3 C of the dome 3 A You may form the subscore line 6 whose residual thickness is thicker than the line L. In this case, by forming the secondary score line 6 at the same time as the score line, stress concentration on the score line L at the time of molding the score line can be alleviated, and partial thinning of the score line L or It can prevent damage such as cracking. In particular, in the case of forming the dome portion 3A after forming the score line, if the score line is damaged at the time of forming the score line, the damage of the score line is increased due to the forming of the dome portion 3A. There is a possibility that the resin coating covering the inner surface may be broken or a crack may occur in the score line, but such a situation can be prevented by forming the sub-score line 6.
本発明の缶容器では、 加熱等によリ缶容器 1の内圧が異常に上昇した場合に、 底蓋 3のドーム部 3 Aの外周縁部 3 Cを基点とし、 ドーム部 3 Aが反転し、 缶容 器 1の外方に突出するように変形する。 このとき、 ドーム部 3 Aの外周縁部 3 C の直ぐ近くに形成されたいずれかのスコア線 Lが破断し、 缶容器 1内部の内容物 (図示せず) が放出されるため、 缶胴部 2と底蓋 3との卷締部 3 Dが破壊された リ、 それに伴って底蓋 3が吹き飛ばされたりすることはない。 ところで、 ドーム部 3 Aが反転する際、 ドーム部 3 Aの中央部分は、 缶容器 1 の軸線方向外方 (下方) に変位するだけで、 ドーム部 3 Aの壁面自体は余り変形 しないが、 ドーム部 3 Aの外周縁部 3 Cの直ぐ近くの壁面は、 ド一厶部 3 Aの半 径方向内方かつ缶容器 1の軸線方向外方へ引っ張られるように大きく変形する。 したがって、 従来の発明では、 ドーム部 3 Aの中央部分付近にスコァ線 Lが形成 されていても、 ドーム部 3 Aの反転時にスコア線 Lが破断しないのに対し、 本発 明では、 各スコア線 Lはドーム部 3 Aの外周縁部 3 Cの直ぐ近くに形成されてい るため、 ドーム部 3 Aの反転時に確実にいずれかのスコア線 Lを破断させること ができる。 特に、 各スコア線 Lの少なくとも一部が、 ドーム部 3 Aの外周縁部 3 Cからその半径方向内方に約 3 m m以内の範囲に位置することが好ましい。 したがって、 その範囲に各スコア線 Lを形成することにより、 より確実にスコ ァ線 Lを破断することができる。 また、 各スコア線 Lは、 ドーム部 3 Aの外周縁 部 3 Cの直ぐ近くに形成されているので、 缶を誤って落下させたときに直接地面 と接触し易い環状接地部である巻締部 3 Dにスコア線が形成されている場合に比 ベて、 落下衝撃による予期しない破断が生じるのを防止できる。 さらに、 本実施 例のように、 スコア線 Lの縦断面形状が逆台形状であり、 傾斜側面 5 Aを繋ぐ底 面 5 Bが形成されているとすれば、 加熱や衝撃などで缶容器 1の内圧がある程度 上昇して、 多少ドーム部 3 Aが外方へ膨らんだとしても、 予期せずにスコア線 L が破断するようなことはない。 In the can container of the present invention, when the internal pressure of the can container 1 abnormally rises due to heating or the like, the dome portion 3A is inverted with the outer peripheral portion 3C of the dome portion 3A of the bottom lid 3 as a base point. , Transforms so as to project outward of can 1. At this time, any score line L formed in the immediate vicinity of the outer peripheral edge portion 3 C of the dome portion 3 A is broken, and the contents (not shown) inside the can container 1 are released. There is no possibility that the bottom cover 3 will be blown off due to destruction of the clamping part 3D between the part 2 and the bottom cover 3. By the way, when the dome portion 3A is inverted, the central portion of the dome portion 3A is displaced outward (downward) only in the axial direction of the can container 1, and the wall surface of the dome portion 3A is not deformed too much. The wall surface immediately adjacent to the outer peripheral edge portion 3 C of the dome portion 3 A is largely deformed so as to be pulled radially inward of the first rib portion 3 A and axially outward of the can container 1. Therefore, in the conventional invention, even if the score line L is formed near the central portion of the dome portion 3A, the score line L is not broken when the dome portion 3A is inverted, whereas in the present invention, each score is not Since the line L is formed in the immediate vicinity of the outer peripheral edge 3 C of the dome portion 3 A, it is possible to reliably break either score line L when the dome portion 3 A is inverted. In particular, it is preferable that at least a part of each score line L be located within about 3 mm radially inward from the outer peripheral edge 3 C of the dome portion 3 A. Therefore, the score line L can be broken more reliably by forming each score line L in that range. In addition, since each score line L is formed in the immediate vicinity of the outer peripheral edge portion 3 C of the dome portion 3 A, it is an annular grounding portion that easily contacts the ground directly when the can is dropped accidentally. Compared with the case where a score line is formed on the part 3D, it is possible to prevent an unexpected breakage due to a drop impact. Furthermore, if the vertical cross-sectional shape of the score line L is an inverted trapezoidal shape and the bottom surface 5 B connecting the inclined side surfaces 5 A is formed as in the present embodiment, the can container 1 can be heated or shocked. Even if the internal pressure rises to some extent and the dome 3A bulges outward somewhat, the score line L does not break unexpectedly.
さらに、 底蓋 3は、 缶容器 1の内圧の上昇により変形し、 反転する際にスコア 線 Lの傾斜側面 5 A , 5 A同士が当接することで、 底面 5 Bに亀裂が生じる。 例 えば、 スコア線 Lに底面 5 Bが無く、 両傾斜側面 5 A , 5 Aの下端同士が直接連 なっている場合には、 底蓋 3が反転するほど圧力が高くならなくても、 ある程度 、 缶容器 1の内圧が上昇し、 ドーム部 3 Aが外方へ膨らんだだけで、 両傾斜側面 5 A , 5 A同士が当接し、 スコア線しが破断するおそれがある。  Furthermore, the bottom lid 3 is deformed due to the increase of the internal pressure of the can container 1, and when inverted, the inclined side surfaces 5A and 5A of the score line L abut each other, causing a crack on the bottom surface 5B. For example, when there is no bottom surface 5 B in the score line L and the lower ends of both inclined side surfaces 5 A and 5 A are directly linked, even if the pressure does not become high enough to reverse the bottom lid 3, If the internal pressure of the can container 1 rises and the dome portion 3A bulges outward, the two inclined side surfaces 5A, 5A abut each other, and there is a risk that the score line may be broken.
それに対して、 本発明の缶容器では、 スコア線 Lが断面逆台形状であって底面 5 Bがあるため、 缶容器 1の内圧がある程度上昇して多少ドーム部 3 Aが外方へ 膨らんだとしても、 その底面 5 Bにより両傾斜側面 5 A, 5 Aの間には隙間がで きる。 そのため、 両傾斜側面 5 A , 5 A同士はすぐには当接せず、 缶容器 1の多 少の圧力上昇だけで、 予期せずにスコア線 Lが破断するようなことはない。 なお 、 底面 5 Bの縦断面形状の幅は、 狭すぎると上述したように多少の底蓋 3の変形 により、 スコア線 Lが破断してしまうが、 広すぎると底蓋 3が反転した際にスコ ァ線 Lが破断し難くなるため、 0 . 0 3 m m〜0 . 1 m m程度の幅が好ましい。 また、 上述したように、 各スコア線 Lの平面形状が半円弧状であり、 各スコア 線しの端部が缶容器 1の略半径方向に向けて延在しているので、 例えば底蓋に直 線状にスコァ線が形成されていた場合に比べて、 ドーム部 3 Aの反転時にスコァ 線 Lが破断した際に、 破断したスコァ線 Lで囲まれた半円板状部分が外方へ浮き 上がり易い。 そのため、 迅速に缶容器 1内部の圧力を開放できる。 さらに、 各ス コア線 Lの端部が缶容器 1の略半径方向に向けて延在しているので、 缶容器 1の 内圧によリ破断が生じたスコァ線 Lの破断が、 スコア線 Lの端部の延長線上にま で生じて、 底蓋 3に亀裂が生じた場合でも、 底蓋 3の一部が破断分離されるよう なことはない。 例えば、 スコア線 Lの端部が円周方向に延在していた場合にスコ ァ線 Lが破断し、 その破断がスコア線 Lの端郡の延長線上にまで生じて底蓋 3に 亀裂が生じた場合に、 その亀裂が円周方向の隣に位置する他のスコア線 Lと繋が つて、 底蓋 3の一部が円板状に破断分離するおそれがある。 On the other hand, in the can container of the present invention, since the score line L has an inverted trapezoidal cross-section and the bottom surface 5 B, the internal pressure of the can container 1 rises to some extent and the dome portion 3 A bulges outward. Also, a gap can be formed between the two inclined side surfaces 5A and 5A by the bottom surface 5B. Therefore, both inclined side surfaces 5 A and 5 A do not immediately come into contact with each other. Even a small pressure rise will not cause the score line L to break unexpectedly. If the width of the vertical cross-sectional shape of the bottom surface 5 B is too narrow, the score line L is broken due to some deformation of the bottom lid 3 as described above, but if the width is too wide, the bottom lid 3 is inverted. A width of about 0.30 mm to 0.1 mm is preferable because the score line L becomes difficult to break. In addition, as described above, since the planar shape of each score line L is a semicircular arc, and the end of each score line extends in the substantially radial direction of the can container 1, for example, When the score line L is broken at the time of inversion of the dome portion 3 A compared to when the score line is formed in a straight line, the semi-disk-like portion surrounded by the broken score line L goes outward. It is easy to rise up. Therefore, the pressure inside the can container 1 can be released quickly. Furthermore, since the end of each score line L extends substantially in the radial direction of the can container 1, the fracture of the score line L in which the fracture has occurred due to the internal pressure of the can container 1 is the score line L Even if the bottom lid 3 is cracked, it does not break apart or separate a part of the bottom lid 3 even if it extends up to the extension of the end of the bottom portion 3. For example, when the end of the score line L extends in the circumferential direction, the score line L is broken, the break occurs on the extension line of the end group of the score line L, and the bottom lid 3 has a crack. If it occurs, the crack may be connected to another score line L located next to the circumferential direction, and part of the bottom cover 3 may break apart in a disc shape.
それに対して、 本発明の缶容器では、 スコア線 Lの端部が缶容器 1の略半径方 向に向けて延在しているので、 スコア線 Lの端部の延長線上に、 円周方向の隣に 位置するスコア線しが位置しない。 そのため、 スコア線 Lの破断が、 その端部の 延長線上にまで生じて、 底蓋に亀裂が生じた際でも、 底蓋の一部が破断分離され るようなことはない。 なお、 本発明の缶容器は、 缶胴部 2に底蓋 3を巻き締めた ものだけなく、 缶胴部と底蓋とを一部材から一体に成形したものであっても良く 、 また、 缶容器自体もエアゾール缶だけでなく、 缶胴部 2の一端にネジ部を成形 したポトル型缶であっても良い。 産業上の利用可能性  On the other hand, in the can container of the present invention, since the end of the score line L extends substantially in the radial direction of the can container 1, the circumferential direction on the extension of the end of the score line L There is no score line located next to. Therefore, breakage of the score line L occurs up to the extension of the end, and even when the bottom lid is cracked, a part of the bottom lid is not broken apart. The can container of the present invention is not limited to the one in which the bottom lid 3 is wound and tightened on the can barrel 2 but may be one in which the can barrel and the bottom lid are integrally formed from one member. The container itself may be not only an aerosol can but also a potl type can having a screw formed at one end of the can body 2. Industrial applicability
この発明は、 エアゾール缶やそのための缶を製造する産業分野で利用すること ができる。  The present invention can be used in the industrial field of manufacturing aerosol cans and cans therefor.

Claims

1 . 缶容器の下端に形成された環状接地部と、 その環状接地部の内周面から缶 容器の内方に凹んでいるドーム部とが形成されている缶容器において、 1. A can container having an annular ground portion formed at the lower end of the can container and a dome portion recessed inward of the can container from the inner peripheral surface of the annular ground portion,
缶容器の内圧が異常に上昇して前記ドーム部が缶容器の外方に突出するように 変形したときに破断される破断容易部が、 前記環状接地部と連なる前記ドーム部 の外周縁部の直ぐ近くに位置する前記ドーム部の外面側に形成されていることを 特徴とする缶容器。  The easily breakable part broken when the internal pressure of the can container rises abnormally and the dome part deforms so as to project outward of the can container is the outer peripheral edge part of the dome part connected to the annular ground part. The can container characterized by being formed in the outer surface side of the said dome part located in immediate vicinity.
 of
2 . 前記破断容易部が、 前記ドーム部の外周縁部からその半径方向に向かって 内方にかつ所定の範囲に形成されていることを特囲徴とする請求項 1に記載の缶容 ¾§。 2. The can as claimed in claim 1, wherein the easily breakable portion is formed inward from the outer peripheral edge of the dome portion in the radial direction and within a predetermined range. §.
3 . 前記ドーム部の外面部に設けられている前記破断容易部が、 前記ドーム部 の外面側から内面側に近づくに従って互いに接近して先細りとなる左右の傾斜側 面と、 それらの傾斜側面を繋ぐ底面とを有する、 縦断面形状が逆台形状となるス コァ線であることを特徴とする請求項 1または 2に記載の缶容器。 3. The easy-to-break portions provided on the outer surface of the dome portion include left and right inclined side surfaces that become closer to each other as the inner surface is approached from the outer surface side of the dome portion, The can container according to claim 1 or 2, which has a connecting bottom surface, and a core line whose vertical cross-sectional shape is an inverted trapezoidal shape.
4 . 前記破断容易部が、 平面形状で略半円弧状であり、 その端部が缶容器の略 半径方向に向けて延在していることを特徴とする請求項 1ないし 3のいずれかに 記載の缶容器。 4. The breakable portion has a planar shape and a substantially semicircular arc shape, and an end portion thereof extends substantially in the radial direction of the can container. Can container described.
5 . 前記破断容易部の少なくとも一部が、 前記ドーム部の外周縁部から 3 m m 以内の範囲に位置していることを特徴とする請求項 1ないし 4のいずれかに記載 の缶容器。 5. The can container according to any one of claims 1 to 4, wherein at least a part of the easy-to-break portion is located within 3 mm from the outer peripheral edge of the dome portion.
6 . 前記スコア線における前記底面の幅は、 0 . 0 3 m m〜0 . 1 m mである ことを特徴とする請求項 3または 4に記載の缶容器。 6. The can container according to claim 3 or 4, wherein a width of the bottom surface in the score line is in the range of 0.003 mm to 0.1 mm.
PCT/JP2005/014860 2004-08-10 2005-08-08 Can container WO2006016679A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US11/573,489 US20090223956A1 (en) 2004-08-10 2005-08-08 Can container
DE602005025651T DE602005025651D1 (en) 2004-08-10 2005-08-08 CANS TANKS
AT05770323T ATE493349T1 (en) 2004-08-10 2005-08-08 CAN CONTAINERS
EP05770323A EP1785371B1 (en) 2004-08-10 2005-08-08 Can container
HK07112395.9A HK1103702A1 (en) 2004-08-10 2007-11-13 Can container

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004-233458 2004-08-10
JP2004233458A JP4781646B2 (en) 2004-08-10 2004-08-10 Can container

Publications (1)

Publication Number Publication Date
WO2006016679A1 true WO2006016679A1 (en) 2006-02-16

Family

ID=35839436

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2005/014860 WO2006016679A1 (en) 2004-08-10 2005-08-08 Can container

Country Status (8)

Country Link
US (1) US20090223956A1 (en)
EP (1) EP1785371B1 (en)
JP (1) JP4781646B2 (en)
CN (1) CN101014515A (en)
AT (1) ATE493349T1 (en)
DE (1) DE602005025651D1 (en)
HK (1) HK1103702A1 (en)
WO (1) WO2006016679A1 (en)

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Also Published As

Publication number Publication date
ATE493349T1 (en) 2011-01-15
CN101014515A (en) 2007-08-08
JP2006051964A (en) 2006-02-23
DE602005025651D1 (en) 2011-02-10
EP1785371A4 (en) 2007-09-26
JP4781646B2 (en) 2011-09-28
HK1103702A1 (en) 2007-12-28
EP1785371A1 (en) 2007-05-16
EP1785371B1 (en) 2010-12-29
US20090223956A1 (en) 2009-09-10

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