WO2020262289A1 - Cap and container - Google Patents

Abstract

In the present invention, a cap according to an embodiment comprises: a cap body having a top plate part that protrudes at least partially from an inner surface, and a cylindrical skirt part provided integrally to the peripheral edge part of the top plate part; and a sealing member provided separately from the cap body, the sealing member being provided inside the cap body facing the top plate part.

Description

Caps and containers

The present invention relates to a cap and a container for sealing a can container for containing a beverage.

Conventionally, in the cap for sealing the mouth of a can container for containing a beverage, a cap having a resin sealing member in close contact with the container mouth is often used on the inner surface of the cap body. Then, in such a cap, in order to reduce the opening torque at the time of opening the cap, a technique for making the cap body and the sealing member non-adhesive has been proposed (for example, Japanese Patent Application Laid-Open No. 2004-217295). No. and Japanese Patent Application Laid-Open No. 2017-178421).

Further, in the cap, a technique of providing an uneven portion such as Braille on the top plate portion is known (see, for example, Japanese Patent Application Laid-Open No. 2002-179122).

Japanese Patent Application Laid-Open No. 2004-217295 Japanese Patent Application Laid-Open No. 2017-178421 Japanese Patent Application Laid-Open No. 2002-179122

However, in such a cap, not only Braille or the like is provided on the top plate of the cap body, but also an uneven portion having a shape having distinctiveness and design is provided, and various information, product distinctiveness, and designability are provided. It is required to improve the function of the cap by providing such as. Further, the sealing member that is separate from the cap body is also required to have improved functions as in the case of the cap body.

Therefore, an object of the present invention is to provide a cap capable of improving the function of the sealing member.

According to one aspect of the present invention, the cap includes a cap body having a top plate portion at least partially protruding from the inner surface and a tubular skirt portion integrally provided on the peripheral edge portion of the top plate portion, and the cap. Separately from the main body, a sealing member provided in the cap main body facing the top plate portion is provided.

The present invention can provide a cap capable of improving the function of the sealing member.

FIG. 1 is a plan view schematically showing the configuration of a cap manufacturing apparatus according to the first embodiment of the present invention. FIG. 2 is a side view showing the structure of the cap and the can container provided with the cap in a partial cross section. FIG. 3 is a perspective view showing the configuration of the cap. FIG. 4 is a side view showing the configuration of the cap in a partial cross section. FIG. 5 is a plan view showing the configuration of the cap. FIG. 6 is a cross-sectional view showing a configuration of a main part of the cap. FIG. 7 is a plan view showing a main configuration of the manufacturing apparatus. FIG. 8 is an explanatory diagram schematically showing a configuration of a main part of the manufacturing apparatus. FIG. 9 is a flow chart showing a part of the process of the manufacturing method of the cap. FIG. 10 is a flow chart showing a part of the process of the manufacturing method of the cap. FIG. 11 is a side view showing a structure of the container according to the second embodiment of the present invention in a partial cross section. FIG. 12 is a perspective view showing the configuration of the cap. FIG. 13 is a side view showing the structure of the cap in a partial cross section. FIG. 14 is a plan view showing the configuration of the cap. FIG. 15 is a cross-sectional view showing the configuration of a main part of the cap. FIG. 16 is a plan view showing the configuration of the sealing member used for the cap. FIG. 17 is a flow chart showing an example of a method for manufacturing the cap. FIG. 18 is a flow chart showing an example of a method for manufacturing the container. FIG. 19 is a side view showing a partial cross-sectional view of the structure of the container according to the third embodiment of the present invention. FIG. 20 is a perspective view showing the configuration of the cap. FIG. 21 is a side view showing the structure of the cap in a partial cross section. FIG. 22 is a plan view showing the configuration of the cap. FIG. 23 is a cross-sectional view showing the main configuration of the cap. FIG. 24 is a plan view showing the configuration of the sealing member used for the cap. FIG. 25 is a side view showing a partial cross-sectional view of the structure of the container according to the fourth embodiment of the present invention. FIG. 26 is a perspective view showing the configuration of the cap. FIG. 27 is a side view showing the structure of the cap in a partial cross section. FIG. 28 is a plan view showing the configuration of the cap. FIG. 29 is a cross-sectional view showing the main configuration of the cap. FIG. 30 is a plan view showing the configuration of the sealing member used for the cap. FIG. 31 is a flow chart showing an example of a method for manufacturing the cap. FIG. 32 is a flow chart showing an example of a method for manufacturing the container.

(First Embodiment)
Hereinafter, the manufacturing apparatus 1 and the manufacturing method of the cap 100 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 14.
FIG. 1 is a plan view schematically showing the configuration of the manufacturing apparatus 1 for the cap 100 according to the first embodiment of the present invention. FIG. 2 is a side view showing a partial cross-sectional view of the structure of the cap 100 and the can container 200 provided with the cap 100. FIG. 3 is a perspective view showing the configuration of the cap 100, FIG. 4 is a side view showing the configuration of the cap 100 in a partial cross section, and FIG. 5 is a plan view showing the configuration of the cap 100. Further, FIG. 6 is an enlarged cross-sectional view showing the cap body 111 and the sealing member 112 of the cap 100. FIG. 7 is a plan view schematically showing the configuration of the sealing member transporting device 15 of the manufacturing apparatus 1, and FIG. 8 is an explanatory view schematically showing the configuration of the second processing apparatus 16B of the manufacturing apparatus 1.

The manufacturing apparatus 1 shown in FIG. 1 is an example of an apparatus for manufacturing a cap 100 that can seal the mouth portion 210 by being wrapped and fixed to the mouth portion 210 of the can container 200. ..

First, the can container 200 and the cap 100 will be described with reference to FIGS. 2 to 6. As shown in FIG. 2, the can container 200 is a so-called bottle-type container for accommodating beverages and the like. For example, the can container 200 is made of a metal material such as an aluminum alloy or a surface-treated steel plate in which resin films are laminated on both sides. The can container 200 is formed in a cylindrical shape having a different outer diameter with one end reduced in diameter. The can container 200 has a mouth portion 210 at one end for discharging the contained beverage. The mouth portion 210 has a jaw portion 211, a male screw portion 212, and a curl portion 213 on the outer peripheral surface thereof from the bottom surface side to the end portion of the can container 200.

The jaw portion 211 is configured to project in an annular shape. The curl portion 213 is formed to have a smaller diameter than the male screw portion 212. Further, the curl portion 213 is configured to be smaller than the inner diameter of the cap 100. The curl portion 213 is formed by bending the end portion of the mouth portion 210 one or more times. The curl portion 213 constitutes an opening for discharging the beverage stored in the can container 200.

As shown in FIGS. 6 and 8, the cap 100 includes a cap main body 111 and a sealing member 112 separately provided in the cap main body 111.

The cap body 111 is made of a material in which a resin film layer is formed on a metal material such as an aluminum alloy. The cap body 111 is formed into a cup shape by drawing, knurling, roll-on, press-molding, or the like, a thin flat plate-shaped material.

The cap body 111 includes a disk-shaped top plate portion 121 and a cylindrical skirt portion 122 hanging from the peripheral edge portion of the top plate portion 121. In the cap body 111, the top plate portion 121 and the skirt portion 122 are integrally and continuously formed by an annular and curved corner portion 123.

The top plate portion 121 is configured in a disk shape. As shown in FIGS. 2 to 5, the top plate portion 121 has a flat main surface and has an uneven portion 121a as a part thereof. The uneven portion 121a is formed, for example, by performing press molding on a part of the top plate portion 121. The uneven portion 121a is formed by at least one of a concave portion and a convex portion provided in a part of the top plate portion 121. That is, the uneven portion 121a is formed by performing at least one of embossing and debossing.

The concavo-convex portion 121a is provided, for example, to allow the cap body 111 to have information such as functionality such as Braille and design such as design. In the present embodiment, as shown in FIGS. 3 and 5, the concave-convex portion 121a will be described with reference to an example formed by a star-shaped concave portion recessed from the outer surface side of the top plate portion 121. The depth of the uneven portion 121a is, for example, 0.05 mm to 2 mm.

One end of the skirt portion 122 is continuous with the top plate portion 121 via the corner portion 123, and the other end is open. The skirt portion 122 includes a plurality of knurl portions 131 having a vent slit 131a, a female screw portion 132, and a tamper evidence band portion 133 from the end portion on the top plate portion 121 side to the opening end portion.

The knurled portion 131, the female screw portion 132, and the tamper evidence band portion 133 include a top plate portion 121, a cylindrical skirt portion 122 in which the knurled portion 131, the female screw portion 132, and the tamper evidence band portion 133 are not formed, and a corner. The cup-shaped molded product 111A composed of the portions 123 is formed by processing such as knurling molding and roll-on molding.

The knurl portion 131 has a plurality of vent slits 131a and protrudes from the inner peripheral surface of the skirt portion 122. The vent slit 131a is a notch for discharging the gas in the can container 200 when opened. The vent slit 131a is provided in a part of the knurled portion 131, and includes a recess that is recessed from the outer surface side to the inner surface side, and a notch for gas discharge provided at the upper end portion of the recess.

The notch-side end of the vent slit 131a protrudes inward in the radial direction of the cap 100 from the other end. The plurality of vent slits 131a lock the non-adhesive sealing member 112 to the cap body 111 by the end on the notch side, and hold the sealing member 112 in the cap body 111.

The female screw portion 132 is configured to be screwable with the male screw portion 212 of the can container 200. The female screw portion 132 is formed together with the can container 200. That is, the female screw portion 132 is not molded in the finished product of the cap 100 before being attached to the can container 200, but is molded when integrally combined with the can container 200.

The tamper evidence band portion 133 engages with the jaw portion 211 of the can container 200 in the direction in which the cap 100 is separated from the can container 200 and in the axial direction of the cap 100.

Further, the tamper evidence band portion 133 has a broken portion 133a for breaking when the cap 100 is opened and for detaching from the skirt portion 122. That is, the tamper evidence band portion 133 is configured by forming a slit leaving the broken portion 133a on the end side of the skirt portion 122, and is integrally combined with the can container 200 like the female screw portion 132. Occasionally, it engages with the jaw portion 211 by being shaped into the shape of the jaw portion 211 of the can container 200.

The sealing member 112 is configured separately from the cap body 111. The sealing member 112 has a disk shape having an outer diameter larger than the diameter of the inscribed circle of the knurled portion 131 provided on the skirt portion 122 of the cap body 111. The sealing member 112 is integrally provided with the cap body 111 by engaging with the vent slit 131a of the knurl portion 131 protruding in the radial direction from the inner peripheral surface of the skirt portion 122 in the axial direction of the cap body 111.

The sealing member 112 includes a disc-shaped sliding layer 141 and a disc-shaped sealing layer 142 integrally laminated on the sliding layer 141. In the sealing member 112, the sliding layer 141 and the sealing layer 142 are made of different synthetic resins. In the sealing member 112, the sealing layer 142 is integrally laminated on the sliding layer 141. For example, as shown in FIG. 2, the sealing member 112 has a flat plate portion 112a having a uniform thickness and a curved surface portion 112b having a curved outer surface on the outer peripheral edge on the top plate portion 121 side. In other words, the sealing member 112 is formed in a disk shape, and the ridge portion on the top plate portion 121 side is formed of a curved surface having a predetermined curvature. The sealing member 112 may be, for example, as shown in FIG. 4, a flat plate portion 112a having a region abutting on the outer peripheral side mouth portion 210 thicker than that on the central side.

The sliding layer 141 is made of a resin material having a relatively higher hardness (harder) than the sealing layer 142. Further, the sliding layer 141 is made of a resin material having neither adhesiveness nor adhesiveness with the resin film layer of the cap body 111. That is, the sliding layer 141 is not adhered to the top plate portion 121, and slides on the top plate portion 121 in a state of being in contact with the top plate portion 121.

Examples of the resin material used for the sliding layer 141 include olefin resins such as polypropylene resin and polyethylene resin, polyester resins such as polyethylene terephthalate, styrene resins, and acrylic resins. In the present embodiment, the sliding layer 141 is made of, for example, polypropylene resin. Pigments, lubricants, softeners and the like can be appropriately added to the resin material used for the sliding layer 141. Further, in the example of the present embodiment, the hardness of the sliding layer 141 is D10 to D70 in terms of the durometer D hardness according to JIS-K7215.

As shown in FIG. 6, the sliding layer 141 is provided separately from the cap body 111 so as to face the top plate portion 121 of the cap body 111. The sliding layer 141 is configured to be slidable with the top plate portion 121 of the cap body 111 depending on the resin material used. The sliding layer 141 is formed in a disk shape. The outer diameter of the sliding layer 141 is smaller than the inner diameter of the skirt portion 122, is substantially the same as the inscribed circle of the knurl portion 131, or is slightly smaller than the inscribed circle of the knurl portion 131, and is slightly smaller than the inscribed circle of the mouth portion 210. It is configured to have a larger diameter than the outer diameter.

As shown in FIGS. 2 and 6, for example, the sliding layer 141 is a first curved surface in which the first flat plate portion 141a having a uniform thickness and the outer surface of the outer peripheral edge on the top plate portion 121 side are formed by a curved surface. A portion 141b and a protrusion 141c provided on the sealing layer 142 side of the first curved surface portion 141b are provided. The thickness of the first flat plate portion 141a is uniformly configured from the center of the sliding layer 141 to the outer peripheral side of the portion of the mouth portion 210 facing the curl portion 213.

The first curved surface portion 141b is configured such that the thickness of the portion of the mouth portion 210 from the outer peripheral side to the outer peripheral edge of the portion facing the curl portion 213 of the mouth portion 210 gradually decreases toward the outer peripheral edge. The protrusion 141c is formed in an annular protrusion shape that is inclined with respect to the axial direction of the sliding layer 141 and the surface direction of the top plate portion 121 and is curved or inclined toward the opening end side of the skirt portion 122. To. The thickness of the protruding portion 141c gradually decreases from the first curved surface portion 141b toward the tip end.

The sealing layer 142 is made of a resin material having a hardness (softer) relatively lower than that of the sliding layer 141. Examples of the resin material used for the sealing layer 142 include olefin resin, polyester resin, styrene resin, acrylic resin and the like, and more preferably, a blend material of styrene elastomer and polypropylene resin, low density polyethylene and styrene resin. Examples thereof include elastomer blend materials and polyester-based elastomers. The resin material used for the sealing layer 142 has adhesiveness with the resin material used for the sliding layer 141. In the present embodiment, the sealing layer 142 is composed of, for example, a blend material of a styrene-based elastomer and a polypropylene resin. Pigments, lubricants, softeners and the like can be appropriately added to the resin material used for the sealing layer 142.

The sealing layer 142 is integrally provided on the main surface of the sliding layer 141 on the side facing the mouth 210. The sealing layer 142 is formed in a disk shape. The outer diameter of the sealing layer 142 is smaller than the inner diameter of the skirt portion 122, substantially the same diameter as the inscribed circle of the knurl portion 131, or slightly larger than the inscribed circle of the knurl portion 131, and the curl portion 213 of the mouth portion 210. It is configured to have a larger diameter than the outer diameter of. That is, the outer diameter of the sealing layer 142 is the same as the outer diameter of the sliding layer 141, or is configured to be larger than the outer diameter of the sliding layer 141.

As shown in FIGS. 2 and 6, the sealing layer 142 includes a second flat plate portion 142a having a uniform thickness and a second curved surface portion 142b in which the outer surface of the outer peripheral edge on the top plate portion 121 side is a curved surface. The second curved surface portion 142b is provided with an annular recess 142c provided on the main surface opposite to the sliding layer 141 side. The main surface of the second flat plate portion 142a facing the curl portion 213 is formed to be flat. For example, the second flat plate portion 142a is configured to have the same diameter as the first flat plate portion 141a of the sliding layer 141. The second flat plate portion 142a, together with the first flat plate portion 141a, constitutes the flat plate portion 112a of the sealing member 112. In this embodiment, the first flat plate portion 141a and the second flat plate portion 142a are set to have the same thickness.

The second curved surface portion 142b has, for example, a main surface flush with the main surface of the second flat surface portion 142a facing the curl portion 213. The second curved surface portion 142b is configured such that the thickness of the portion from the outer peripheral side to the outer peripheral edge of the mouth portion 210 facing the curl portion 213 is gradually reduced toward the outer peripheral edge. The second curved surface portion 142b is laminated on the first curved surface portion 141b and the protrusion 141c. The second curved surface portion 142b, together with the first curved surface portion 141b and the protrusion portion 141c, constitutes the curved surface portion 112b of the sealing member 112.

The recess 142c is in contact with the vent slit 131a when the cap 100 is arranged with the top plate portion 121 facing upward and the sealing member 112 falls below the top plate portion 121. The recess 142c is, for example, an annular recess having a semicircular cross section.

The sliding layer 141 and the sealing layer 142 are configured such that the first curved surface portion 141b, the protruding portion 141c, and the second curved surface portion 142b are thinner than the first flat surface portion 141a and the second flat plate portion 142a, respectively.

In the method of capping the cap 100 to the mouth 210 of the can container 200 configured in this manner, for example, the curl portion 213, which is the tip of the mouth 210 of the can container 200, and the sealing layer 142 of the sealing member 112 come into contact with each other. The cap 100 is put on the mouth 210 of the can container 200 so as to do so. In this state, a load is applied to the top plate portion 121 of the cap body 111, and the skirt portion 122 is roll-on molded while the corner portion 123 is drawn downward (can container 200). As a result, as shown in FIG. 2, a female screw portion 132 is formed on the skirt portion 122 of the cap 100, and the cap 100 is wound and fixed to the mouth portion 210 of the can container 200. In addition, such a capping method is performed in a state where the beverage is filled in the can container 200. Further, for example, the can container 200 in which the cap 100 is capped is subjected to, for example, retort processing.

Next, the manufacturing apparatus 1 of the cap 100 will be described with reference to FIGS. 1, 7, and 8.

The manufacturing device 1 is installed in a factory and constitutes a mass production line for the cap 100. The manufacturing device 1 includes a transport device 11, a shell press device 12, a sliding layer molding device 13, a sealing layer molding device 14, a sealing member transport device 15, and a molded product processing device 16. Further, the manufacturing apparatus 1 is connected to the conveying apparatus 11, the shell press apparatus 12, the sliding layer forming apparatus 13, the sealing layer forming apparatus 14, the sealing member conveying apparatus 15, and the molded product processing apparatus 16, and is stored in advance. A control device 19 for controlling each configuration at the time of manufacturing the cap 100 is provided.

The manufacturing apparatus 1 conveys the molded product 111A of the cap body 111 molded by the shell press apparatus 12 by the conveying apparatus 11, and forms the sealing member 112 by the sliding layer forming apparatus 13 and the sealing layer forming apparatus 14. Further, the manufacturing apparatus 1 takes out the sealing member 112 molded from the molded product 111A by the sealing member transporting device 15, molds the cap body 111 from the molded product 111A by the molded product processing device 16, and molds the molded product by the sealing member transporting device 15. The sealing member 112 is inserted into 111A. The manufacturing apparatus 1 manufactures the cap 100 by performing these steps.

The transport device 11 transfers the molded product 111A molded by the shell press device 12 in the order of the sliding layer molding device 13, the sealing layer molding device 14, the sealing member transport device 15, the molded product processing device 16, and the sealing member transport device 15. Transport with. Further, the transport device 11 transports the completed cap body 111 to a collection unit 17 such as a container for transporting the completed cap body 111 to the next process which is an inspection / packing process.

Here, the molded product 111A is composed of a top plate portion 121, a cylindrical skirt portion 122 in which the knurl portion 131, the female screw portion 132, and the tamper evidence band portion 133 are not molded, and a corner portion 123. It is configured in a cup shape.

As shown in FIG. 1, the transport device 11 is, for example, a rail provided across each device and continuously transports the molded product 111A in a row. As a specific example, the transport device 11 includes a first rail 11a provided between the shell press device 12 and the sliding layer forming device 13, and a second rail 11a provided between the sliding layer forming device 13 and the sealing layer forming device 14. It includes a rail 11b, a third rail 11c provided between the sealed layer molding device 14 and the molded product processing device 16, and a fourth rail 11d provided between the molded product processing device 16 and the collecting unit 17. ..

Further, the middle part of the third rail 11c and the middle part of the fourth rail 11d are sealed members arranged between the sealing layer molding device 14 and the molded product processing device 16 and between the molded product processing device 16 and the collecting unit 17. It is connected to the transport device 15.

As a specific example, the third rail 11c supplies the molded product 111A from the sealing layer forming apparatus 14 to the sealing member conveying device 15, and supplies the molded article 111A from the sealing member conveying device 15 to the molded article processing apparatus 16. .. That is, the third rail 11c is composed of two rails 11c1 and 11c2 separated by the sealing member conveying device 15.

Similarly, the fourth rail 11d supplies the molded product 111A from the molded product processing device 16 to the sealing member transporting device 15, and supplies the molded product 111A from the sealing member transporting device 15 to the collecting unit 17. That is, the fourth rail 11d is composed of two rails 11d1 and 11d2 divided by the sealing member transport device 15.

The shell press device 12 is a press machine that forms a molded product 111A by squeezing a sheet-shaped metal material. As shown in FIG. 1, the shell press device 12 includes a storage unit 12a for temporarily storing the molded product 111A, and a supply unit 12b for supplying the molded product 111A from the storage unit 12a to the transfer device 11. ing.

As shown in FIG. 1, the sliding layer forming apparatus 13 includes, for example, a first mold 13A, a conveying mechanism 13B, and a material supply apparatus 13C. The first mold 13A includes a lower mold, an upper mold, and a lower mold driving device that is connected to the lower mold and drives the lower mold. The first mold 13A is, for example, a mobile mold in which the upper mold is a fixed mold and the lower mold moves with respect to the upper mold. The first mold 13A is appropriately set to have a shape in which the sliding layer 141 can be molded in the molded product 111A.

The transport mechanism 13B moves the molded product 111A transported to the sliding layer molding device 13 by the transport device 11 along each step in the sliding layer molding device 13, and also moves the secondary side of the sliding layer molding device 13. Is moved to the transport device 11.

The material supply device 13C melts or softens the resin material for molding the sliding layer 141, and supplies a predetermined amount to the molded product 111A.

As shown in FIG. 1, the sealing layer forming apparatus 14 includes a second mold 14A, a conveying mechanism 14B, and a material supply apparatus 14C.

Like the first mold 13A, the second mold 14A includes a lower mold, an upper mold, and a lower mold driving device connected to the lower mold to drive the lower mold. .. The second mold 14A is, for example, a mobile mold in which the upper mold is a fixed mold and the lower mold moves with respect to the upper mold. The second mold 14A is appropriately set in a shape capable of forming the sealing layer 142 on the sliding layer 141 in the molded product 111A.

The transfer mechanism 14B moves the molded product 111A including the sliding layer 141 conveyed to the seal layer molding device 14 by the transfer device 11 along each step in the seal layer molding device 14, and also causes the seal layer molding device 14 to move. It is moved to the transport device 11 on the secondary side.

The material supply device 14C melts or softens the resin material for molding the sealing layer 142, and supplies a predetermined amount onto the sliding layer 141 arranged in the molded product 111A.

As shown in FIG. 7, the sealing member transport device 15 is arranged between the sealing layer molding device 14 and the molded product processing device 16 with the third rail 11c and the molded product processing device 16 and the collecting unit 17. It is connected to the 4 rail 11d. The sealing member transport device 15 includes a holding mechanism 41 for holding a plurality of molded products 111A, two supply mechanisms 42 for supplying the molded products 111A to the holding mechanism 41 at predetermined intervals, and a plurality of holding mechanisms 41. A sealing member conveying mechanism 43 for conveying the sealing member 112 of the molded product 111A is provided.

As shown in FIG. 7, the holding mechanism 41 includes a disk-shaped first rotating body 41a and a driving mechanism 41b for rotating the first rotating body 41a. The first rotating body 41a has a plurality of semicircular notches 41c on the outer peripheral surface. The radius of curvature of the notch 41c is formed to be the same as the radius of the outer peripheral surface of the molded product 111A.

The first rotating body 41a arranges the molded product 111A supplied from the primary side rail 11c1 of the third rail 11c in the notch 41c and rotates the molded product 111A to convey it to the secondary side rail 11c2. Further, in the first rotating body 41a, a plurality of notches 41c are arranged between the rail 11c1 and the rail 11c2.

Further, in the first rotating body 41a, the molded product 111A supplied from the primary side rail 11d1 of the fourth rail 11d is arranged in the notch 41c and rotated to be conveyed to the secondary side rail 11d2. Further, in the first rotating body 41a, a plurality of notches 41c are arranged between the rail 11d1 and the rail 11d2.

The drive mechanism 41b rotates and stops the first rotating body 41a. The drive mechanism 41b is composed of a motor, a transmission medium for transmitting rotation, and the like.

The supply mechanism 42 includes a second rotating body 42a and a driving mechanism 42b that rotates the second rotating body 42a. The second rotating body 42a supplies the molded product 111A from the rail 11c1 or the rail 11d1 to the notch 41c of the first rotating body 41a.

For example, the two supply mechanisms 42 are provided at the ends of the rail 11c1 on the primary side of the third rail 11c and the rail 11d1 on the primary side of the fourth rail 11d, respectively.

As shown in FIG. 7, the sealing member transport mechanism 43 includes a plurality of first suction devices 51 for sucking the sealing member 112, a pair of second suction devices 52 for sucking the molded product 111A, and a plurality of first suction devices 52. A transport device 53 for transferring the suction device 51 and a vacuum pump device 54 are provided.

The plurality of first suction devices 51 are arranged in the same arrangement as the notch 41c of the first rotating body 41a arranged between the rail 11c1 and the rail 11c2 (rail 11d1 and rail 11d2). The first suction device 51 is provided in the same number as the notches 41c arranged between the rail 11c1 and the rail 11c2 (rail 11d1 and rail 11d2). The first suction device 51 has a vacuum pad in close contact with the sealing member 112, and the sealing member 112 is sucked by creating a negative pressure between the vacuum pad and the sealing member 112 by a vacuum pump device 54 or the like.

The second suction device 52 sucks the molded product 111A by making the mounting portion on which the molded product 111A is placed a negative pressure by a vacuum pump device 54 or the like. The plurality of second suction devices 52 are arranged in the same arrangement as the notch 41c of the first rotating body 41a arranged between the rail 11c1 and the rail 11c2. One of the pair of second suction devices 52 is arranged between the rails 11c1 and 11c2, and the other is arranged between the rails 11d1 and 11d2.

That is, the pair of the plurality of second suction devices 52 are transferred from the rail 11c1 to the rail 11c2 to the molded product 111A held in the notch 41c of the first rotating body 41a and from the rail 11d1 to the rail 11d2. The molded product 111A held in the notch 41c of the first rotating body 41a is simultaneously held.

The transport device 53 holds the plurality of first suction devices 51 in an array facing each of the plurality of second suction devices 52, and moves between the pair of second suction devices 52. Further, in the transport device 53, the height position where the vacuum pad of the first suction device 51 comes into contact with the sealing member 112 provided in the molded product 111A mounted on the second suction device, and the second suction device. The plurality of first suction devices 51 are moved between the height positions separated from the molded product 111A placed on the above.
That is, the transport device 53 moves the plurality of first suction devices 51 in the direction of gravity with respect to the molded product 111A mounted on the second suction device, and moves the plurality of first suction devices 51 to the first rotating body 41a. Rotate 180 ° as the center of rotation of.

As shown in FIG. 1, the molded product processing device 16 includes a first processing device 16A, a second processing device 16B, and a transfer mechanism 16C.

The first processing apparatus 16A molds the knurl portion 131 and the tamper evidence band portion 133 on the skirt portion 122 of the molded product 111A.

As shown in FIG. 8, the second processing apparatus 16B forms the uneven portion 121a on the top plate portion 121 of the molded product 111A. The second processing device 16B is a press device that press-molds the top plate portion 121 with a die.

As shown in FIG. 8, the second processing device 16B includes, for example, a lower mold 61, an upper mold 62, and a mold driving device 63. In the second processing apparatus 16B, for example, one of the lower mold 61 and the upper mold 62 is a fixed mold, and the other of the lower mold 61 and the upper mold 62 is a mobile mold. In this embodiment, an example in which the lower mold 61 is a fixed mold and the upper mold 62 is a mobile mold will be described.

The lower mold 61 is configured to be able to hold the molded product 111A. The lower mold 61 holds the inner surface of the top plate portion 121 so that the skirt portion 122 of the molded product 111A extends downward. The lower mold 61 is formed so that, for example, the side surface can be prevented from interfering with the skirt portion 122. As a specific example, the outer diameter of the lower mold 61 is larger than the minimum inner diameter of the skirt portion 122, and in the present embodiment, the diameter of the inscribed circles of the plurality of vent slits 131a of the knurled portion 131 formed in the skirt portion 122. Set to a small diameter.

The lower mold 61 has a first uneven portion 61a that forms the uneven portion 121a. The first uneven portion 61a is provided at a portion of the lower mold 61 facing the top plate portion 121 of the molded product 111A held by the lower mold 61. In the present embodiment, since the uneven portion 121a of the top plate portion 121 is a star-shaped concave portion, the first uneven portion 61a is a star-shaped concave portion having substantially the same shape. Further, the first uneven portion 61a is formed to be slightly larger than the shape of the uneven portion 121a in consideration of the thickness of the top plate portion 121 and the deformation allowance due to molding. Further, the depth of the first uneven portion 61a is set deeper than the depth of the uneven portion 121a.

The upper mold 62 is arranged so as to face the lower mold 61. The upper mold 62 has a second uneven portion 62a that forms the uneven portion 121a. The second uneven portion 62a is provided at a portion of the upper mold 62 facing the first uneven portion 61a. Since the concave-convex portion 121a of the top plate portion 121 is a star-shaped concave portion in the present embodiment, the second uneven portion 62a is a star-shaped protrusion. Further, the second uneven portion 62a is formed to be slightly smaller than the first uneven portion 61a and substantially the same shape as the uneven portion 121a in consideration of the thickness of the top plate portion 121 and the deformation allowance due to molding. The height of the second uneven portion 62a is set higher than the depth of the uneven portion 121a.

The mold drive device 63 moves the movable upper mold 62 with respect to the fixed lower mold 61 in one direction. Further, the mold driving device 63 presses the top plate portion 121 with a predetermined press load when forming the uneven portion 121a on the top plate portion 121 with the lower mold 61 and the upper mold 62.

The transport mechanism 16C moves the molded product 111A transported to the sliding layer molding device 13 by the transport device 11 along each step in the molded product processing device 16, and also transports the secondary side of the molded product processing device 16. Move to device 11. In the present embodiment, the transfer mechanism 16C, for example, conveys the molded product 111A to the first processing device 16A, and then conveys the molded product 111A to the second processing device 16B. That is, in the present embodiment, the molded product processing apparatus 16 first conveys the molded article 111A to the first processing apparatus 16A, and then the first processing apparatus 16A forms the knurl portion 131 and the tamper evidence band portion 133. An example of transporting the molded product 111A to the second processing apparatus 16B will be described.

Next, a method of manufacturing the cap 100 using the manufacturing apparatus 1 configured in this way will be described with reference to FIGS. 9 and 10. 9 and 10 are flow charts showing an example of a manufacturing process of the cap 100 using the manufacturing apparatus 1 of the cap 100 together with the configurations of the molded product 111A and the cap 100. In the manufacture of the cap 100 using the manufacturing device 1, the control device 19 controls each of the configurations 11, 12, 13, 14, 15, and 16 of the manufacturing device 1, but the description thereof will be omitted.

First, the shell press device 12 squeezes the sheet-shaped metal material to form the molded product 111A (step ACT1). Next, the molded product 111A stored in the storage unit 12a is supplied from the supply unit 12b to the transfer device 11, and the transfer device 11 conveys the molded product 111A to the sliding layer molding device 13. Next, the sliding layer molding apparatus 13 molds the sliding layer 141 on the top plate portion 121 of the molded product 111A (step ACT2).

Next, the transport device 11 transports the molded product 111A on which the sliding layer 141 is molded to the sealed layer molding device 14. Next, the sealing layer molding apparatus 14 molds the sealing layer 142 on the sliding layer 141 in the molded product 111A (step ACT3). As a result, the sealing member 112 is molded in the molded product 111A.

Next, in the transport device 11, the sealing member 112 is molded, and the molded product 111A housed inside is transported to the sealing member transport device 15. Next, the sealing member conveying device 15 takes out the sealing member 112 in the molded product 111A (step ACT4).

As a specific example, first, the molded product 111A is sequentially supplied from the rail 11c1 of the third rail 11c to the notch 41c of the first rotating body 41a by the supply mechanism 42, and is between the rail 11c1 and the rail 11c2 of the third rail 11c. A molded product 111A including a sealing member 112 is arranged in all of the plurality of notches 41c. As a result, the plurality of molded products 111A are placed on the second suction device 52, respectively.

In this state, the transport device 53 transports the plurality of first suction devices 51 to positions facing the molded product 111A, drives the vacuum pump device 54, and uses the plurality of first suction devices 51 in the molded product 111A. The sealing member 112 is sucked to raise the first suction device 51. As a result, the sealing member 112 is taken out from the molded product 111A. Next, the first rotating body 41a rotates, and the molded product 111A from which the sealing member 112 is taken out is sent out to the rail 11c2 of the third rail 11c, so that the molded product 111A is supplied to the molded product processing device 16.

Next, the transport device 11 transports the molded product 111A from which the sealing member 112 has been taken out to the molded product processing device 16. The molded product processing apparatus 16 molds the knurled portion 131, the tamper evidence band portion 133, and the uneven portion 121a on the molded product 111A (step ACT5).

As a specific example, first, the transfer mechanism 16C conveys the molded product 111A transported to the molded product processing device 16 to the first processing device 16A. Next, the first processing apparatus 16A molds the knurl portion 131 and the tamper evidence band portion 133 on the skirt portion 122 of the molded product 111A.

Next, the transport mechanism 16C transports the molded product 111A in which the knurl portion 131 and the tamper evidence band portion 133 are molded to the second processing device 16B. At this time, as shown in FIG. 8, the transport mechanism 16C transports the molded product 111A to the lower mold 61 so that the inner surface side of the top plate portion 121 of the molded product 111A faces the upper surface of the lower mold 61.

Next, the second processing device 16B lowers the upper mold 62, which is a movable mold, toward the lower mold 61 by the mold driving device 63, and the lower mold 61 and the upper mold 62 raise the molded product 111A. The plate portion 121 is press-molded. As a result, the uneven portion 121a is formed on the top plate portion 121 of the molded product 111A. As a result, the cap body 111 is formed. Next, the mold driving device 63 raises the upper mold 62 and retracts it from the lower mold 61. Next, the transport mechanism 16C transports the molded product 111A (cap body 111) on which the knurled portion 131, the tamper evidence band portion 133, and the uneven portion 121a are molded to the fourth rail 11d.

Next, the transport device 11 transports the molded product 111A to the sealing member transport device 15. Next, the sealing member conveying device 15 inserts the sealing member 112 into the molded product 111A (step ACT6).

As a specific example, first, the molded product 111A is sequentially supplied from the rail 11d1 of the fourth rail 11d to the notch 41c of the first rotating body 41a by the supply mechanism 42, and is between the rail 11d1 and the rail 11d2 of the fourth rail 11d. The molded product 111A is arranged in all of the plurality of notches 41c.

Next, the transfer device 53 conveys the plurality of first suction devices 51 on which the sealing member 112 is sucked into the molded product 111A, and inserts the sealing member 112 into the molded product 111A. For example, step ACT4 and step ACT6 are performed simultaneously in the sealing member transfer device 15. Cap 100 is manufactured by these steps (step ACT7).

Next, the first rotating body 41a rotates and the cap 100 is sent out to the rail 11d2 of the fourth rail 11d, so that the cap 100 is collected by the collecting unit 17. When a certain number of caps 100 are collected in the collecting unit 17, the caps 100 are transported to the inspection / packing process, which is the next process.

In the manufacturing method of the cap 100 configured as described above, after the sealing member 112 is molded in the molded product 111A, the sealing member 112 is taken out from the molded product 111A, and then the uneven portion 121a is molded on the top plate portion 121. Therefore, even when the sealing member 112 is molded by the molded product 111A, the sealing member 112 is not arranged in the molded product 111A when the uneven portion 121a is molded. Therefore, the method of manufacturing the cap 100 has good productivity and good moldability of the uneven portion 121a.

Further, in the method of manufacturing the cap 100, the knurled portion 131 and the tamper evidence band portion 133 are formed by the first processing apparatus 16A, and then the uneven portion 121a is press-formed by the second processing apparatus 16B. By using such a manufacturing method, the uneven portion 121a is not formed on the molded product 111A when the knurl portion 131 and the tamper evidence band portion 133 are molded. Therefore, when the knurl portion 131 and the tamper evidence band portion 133 are molded by the first processing apparatus 16A, the uneven portion 121a is crushed or the uneven portion 121a is crushed when the top plate portion 121 of the molded product 111A is fixed with a jig or the like. It is possible to prevent the portion 121a from interfering with the jig or the like forming the knurl portion 131 of the first processing apparatus 16A. Therefore, such a method of manufacturing the cap 100 can prevent the molding accuracy of the knurled portion 131 from being lowered.

Further, in the cap 100, the sealing member 112 can improve the function in the same manner as the uneven portion 121a of the top plate portion 121. For example, when the uneven portion 121a is provided with functions such as information such as Braille and product display and design such as design, the sealing member 112 may also be provided with the same information and function by the deformed portion 112d. it can.

For example, when the uneven portion 121a and the deformed portion 112d are marked so that the production lot or the like can be determined, the production lot can be determined not only for the cap body 111 but also for the sealing member 112. Further, for example, when the deformed portion 112d is provided with a design property, the design property of the sealing member 112 can be improved.

Further, since the sealing member 112 is adhered to the cap body 111 and is separate from the cap body 111, various designs can be applied to, for example, motivate the purchaser to collect the sealing member 112. It is also possible to motivate the purchase of a product in which the container 1 is filled with a beverage. It is also possible to design the cap body 111 and the sealing member 112 according to the season, the event, and the like.

Further, by providing the concavo-convex portion 121a on the cap body 111 and further providing the deformed portion 112d on the sealing member 112, the cap 100 can enhance the design of both the inside and the outside.

Further, for example, by setting the shapes of the concave-convex portion 121a and the deformed portion 112d to be annular or the like, it is possible to provide a function capable of aligning the sealing member 112 with respect to the top plate portion 121 in the radial direction. Therefore, when the container 1 once opened is sealed again, the thick portion 112c of the sealing member 112 can be aligned with the mouth portion 210.

Further, since the deforming portion 112d is configured to deform the sealing member 112, it is not necessary to increase the material used for the sealing member 112, and the functionality of the sealing member 112 is improved without increasing the manufacturing cost. Can be made to. As described above, the function of the sealing member 112 can be improved by providing various information, functions, designs, and the like by the deformed portion 112d.

Further, the uneven portion 121a is composed of concave portions, and a flat plate portion is arranged around the central axis of the cap main body 111 in a part in the circumferential direction of the uneven portion 121a, and when the cap main body 111 is rotated at the time of opening, the uneven portion The 121a and the deformed portion 112d may be misaligned. With such a configuration, when the cap is opened, the uneven portion 121a of the top plate portion 121 presses a part of the sealing member 112 excluding the deformed portion 112d, so that the sealing member 112 is pressed against the mouth portion 210. Therefore, the sealing property of the sealing member 112 can be improved.

As described above, according to the method for manufacturing the cap 100 according to the first embodiment of the present invention, the productivity is good and the moldability of the uneven portion 121a is good. Further, according to the cap 100 manufactured by the manufacturing method according to the first embodiment of the present invention, the function of the sealing member 112 can be improved.

The present invention is not limited to the above-described embodiment. For example, in the above-mentioned example, as a method for manufacturing the cap 100, an example in which the knurled portion 131 and the tamper evidence band portion 133 are formed by the first processing apparatus 16A and then the uneven portion 121a is press-formed by the second processing apparatus 16B has been described. Is not limited to this.

For example, after the uneven portion 121a is press-molded by the second processing apparatus 16B, the knurl portion 131 and the tamper evidence band portion 133 may be formed by the first processing apparatus 16A. In the case of such a manufacturing method, for example, the first processing apparatus 16A abuts a region of the top plate portion 121 facing the uneven portion 121a of the jig for forming the knurl portion 131 with at least the uneven portion 121a. It is preferable to let it escape so as not to. Further, the transport mechanism 16C may transport the molded product 111A to the second processing device 16B and then transport the molded product 111A to the first processing device 16A. In such a method of manufacturing the cap 100, since the concavo-convex portion 121a can be formed on the molded product in which the sealing member 112 is removed from the molded product 111A, even when the sealing member 112 is molded by the molded product 111A, the concavo-convex portion 121a The sealing member 112 is not arranged in the molded product 111A at the time of molding. Therefore, the method of manufacturing the cap 100 has good productivity and good moldability of the uneven portion 121a.

Further, as another example of the method for manufacturing the cap 100, the concave-convex portion 121a may be molded at the same time as the sealing member 112 is molded. That is, the first concavo-convex portion 61a and the second concavo-convex portion 61a and the second concavo-convex portion 61a on both or one of the first mold 13A of the sliding layer molding apparatus 13 for molding the sealing member 112 and the second mold 14A of the sealing layer molding apparatus 14. 62a may be provided. Then, when the sealing member 112 is formed by the first mold 13A and the second mold 14A, or the first mold 13A, the top plate portion 121 may be press-processed with a predetermined load.

In consideration of moldability, when the sliding layer 141 is molded, the uneven portion 121 is formed on the top plate portion 121 at the same time as the sliding layer 141 by the first mold 13A provided with the first uneven portion 61a and the second uneven portion 62a. 121a is molded, and at the time of molding the sealing layer 142, the sealing layer 142 is molded by a second mold 14A provided with a first uneven portion 61a and a second uneven portion 62a at a portion corresponding to the formed uneven portion 121a. Is preferable. Further, in consideration of omitting the positioning of the sealing layer 142 at the time of molding, the first uneven portion 61a and the second uneven portion 62a are not provided on the first mold 13A at the time of molding the sliding layer 141, and the sealing layer 142 is formed. At the time of molding, it is preferable that the first uneven portion 61a and the second uneven portion 62a are provided on the second mold 14A, and the uneven portion 121a is formed at the same time as the sealing layer 142.

By adopting such a manufacturing method of the cap 100, the uneven portion 121a can be formed on the top plate portion 121 at the same time as the forming of the sealing member 112. Further, when molding the sliding layer 141 and the sealing layer 142 of the sealing member 112, since the resin material has fluidity, the uneven portion 121a is press-molded on the top plate portion 121 at the time of molding each of the layers 141 and 142. However, the productivity is good, and the moldability of the uneven portion 121a is good. In addition, since the sealing member 112 is formed with irregularities having the same shape as the uneven portion 121a, the sealing member 112 is provided with irregularities for centering, and the sealing member 112 is provided with information such as design. Is possible.

Further, the manufacturing apparatus 1 described above can form the sealing member 112 in the molded product 111A, and even if the uneven portion 121a is molded on the top plate portion 121, the productivity is good and the moldability of the uneven portion 121a is good. If it is good, various configurations can be changed as appropriate.

(Second Embodiment)
Hereinafter, the cap 1100 and the container 1001 in which the cap 1100 is used according to the second embodiment of the present invention will be described with reference to FIGS. 11 to 18.
FIG. 11 is a side view showing a structure of the container 1001 according to the embodiment of the present invention in a partial cross section. FIG. 12 is a perspective view showing the configuration of the cap 1100. FIG. 13 is a side view showing the configuration of the cap 1100 in a partial cross section. FIG. 14 is a plan view showing the configuration of the cap 1100. FIG. 15 is an enlarged cross-sectional view showing the cap body 1111 and the sealing member 1112 of the cap 1100. FIG. 16 is a plan view showing the structure of the sealing member 1112 from the sliding layer 1141 side. The alternate long and short dash line in FIG. 16 shows the top plate portion 1121 and the recess 1121a when the cap body 111 is rotated by 36 ° at the time of opening. FIG. 17 is a flow chart showing an example of a method for manufacturing the cap 1100, and FIG. 18 is a flow chart showing an example of a method for manufacturing the container 1001.

As shown in FIG. 11, the container 1001 includes a cap 1100 and a can container 1200 sealed by the cap 1100. The container 1001 is a positive pressure can filled with a beverage by sealing the can container 1200 filled with the beverage with a cap 1100. The positive pressure can has an internal pressure higher than that of the atmospheric pressure, and is produced by making the beverage itself a beverage filled with a gas such as carbonic acid or by filling the beverage with liquid nitrogen.

First, the can container 1200 to which the cap 1100 is crowned will be described with reference to FIG. As shown in FIG. 11, the can container 1200 is a so-called bottle-type container for accommodating beverages and the like. For example, the can container 1200 is made of a metal material such as an aluminum alloy or a surface-treated steel plate in which resin films are laminated on both sides. The can container 1200 is formed in a cylindrical shape having a different outer diameter with one end reduced in diameter. The can container 1200 has a mouth portion 1210 at one end for discharging the contained beverage. The mouth portion 1210 has a jaw portion 1211, a male screw portion 1212, and a curl portion 1213 on the outer peripheral surface thereof from the bottom surface side to the end portion of the can container 1200.

The jaw portion 1211 is configured to project in an annular shape. The curl portion 1213 is formed to have a smaller diameter than the male screw portion 1212. Further, the curl portion 1213 is configured to be smaller than the inner diameter of the cap 1100. The curl portion 1213 is formed by bending the end portion of the mouth portion 1210 one or more times. The curl portion 1213 constitutes an opening for discharging the beverage stored in the can container 1200.

Next, the cap 1100 according to this embodiment will be described. As shown in FIGS. 11 to 15, the cap 1100 includes a cap main body 1111 and a sealing member 1112 separately provided in the cap main body 1111.

The cap body 1111 is made of a material in which a resin film layer is formed on a metal material such as an aluminum alloy. The cap body 1111 is formed in a cup shape by drawing, knurling, roll-on, press-molding, or the like, a thin flat plate-shaped material.

The cap body 1111 includes a disk-shaped top plate portion 1121 and a cylindrical skirt portion 1122 hanging from the peripheral edge portion of the top plate portion 1121. In the cap body 1111, the top plate portion 1121 and the skirt portion 1122 are integrally and continuously formed by an annular and curved corner portion 1123.

The top plate portion 1121 is configured in a disk shape. As shown in FIGS. 11 to 15, the top plate portion 1121 has a flat main surface, excluding a recess 1121a and a recess 1121a that are partially recessed from the outer main surface side to the inner main surface side. It has a flat plate portion 1121b that constitutes a region. The recess 1121a is formed, for example, by press-molding a part of the top plate portion 1121. The recess 1121a is formed by being embossed.

The recess 1121a presses the sealing member 1112 that is not adhered to the cap body 1111 when the cap body 1111 is opened from the can container 1200.

The recess 1121a can have a small-diameter recess or an arbitrary pattern such as a star shape as shown in FIGS. 12, 14 and 16. As a specific example, the recess 1121a has a shape in which the flat plate portion 1121b exists in a part in the circumferential direction around the central axis of the top plate portion 1121. That is, the recess 1121a is formed in a shape other than the circular shape centered on the center of the top plate portion 1121. In other words, the recess 1121a is formed in a shape that causes a positional deviation from the position before rotation when the cap body 1111 is rotated.

For example, the height of the recess 1121a from the inner surface of the top plate portion 1121 is set within the range of 0.05 mm to 2.0 mm. This is because if the height of the top plate portion 1121 of the recess 1121a from the inner surface is smaller than 0.05 mm, the action of pressing the sealing member 1112 against the mouth portion 1210 does not function sufficiently, and if it is larger than 2.0 mm, This is because if the central side of the sealing member 1112 is pushed down too much, the sealing member 1112 may be insufficiently locked by the plurality of vent slits 1131a described later.

In order to allow the pressing action of the sealing member 1112 to fully function and to ensure that the sealing member 1112 is locked, the height of the recess 1121a from the inner surface of the top plate portion 1121 is preferably set to 0. It is set within the range of 3 mm to 1.0 mm. The top plate portion 1121 may have a concave-convex portion for giving Braille, a design, or the like in addition to the concave portion 1121a.

The skirt portion 1122 is configured such that one end is continuous with the top plate portion 1121 via the corner portion 1123 and the other end is open. The skirt portion 1122 includes a plurality of knurled portions 1131 having a vent slit 1131a, a female screw portion 1132, and a tamper evidence band portion 1133 from the end portion on the top plate portion 1121 side to the opening portion.

The knurled portion 1131, the female screw portion 1132 and the tamper evidence band portion 1133 have a top plate portion 1121, a knurled portion 1131, a female screw portion 1132 and a cylindrical skirt portion 1122 in which the tamper evidence band portion 1133 is not formed, and a corner. A cup-shaped molded product composed of parts 1123 is formed by processing such as nerling molding or roll-on molding.

The knurl portion 1131 has a plurality of vent slits 1131a and protrudes from the inner peripheral surface of the skirt portion 1122. The vent slit 1131a is a notch for discharging the gas in the can container 1200 when opened. The vent slit 1131a is provided in a part of the knurled portion 1131 and includes a recess that is recessed from the outer surface side to the inner surface side, and a notch for gas discharge provided at the upper end portion of the recess.

The end of the vent slit 1131a on the notch side (the other end side of the skirt portion 1122) protrudes inward in the radial direction of the cap 1100 from the end on the other side. The plurality of vent slits 1131a form a locking portion in which the non-adhesive sealing member 1112 is locked to the cap body 1111 by the end portion on the notch side, and the sealing member 1112 is held in the cap body 1111.

The female screw portion 1132 is configured to be screwable with the male screw portion 1212 of the can container 1200. The female screw portion 1132 is formed together with the can container 1200. That is, the female screw portion 1132 is not molded in the finished product of the cap 1100 before being attached to the can container 1200, but is molded when integrally combined with the can container 1200.

The tamper evidence band portion 1133 engages with the jaw portion 1211 of the can container 1200 in the direction in which the cap 1100 is separated from the can container 1200 and in the axial direction of the cap 1100.

Further, the tamper evidence band portion 1133 has a broken portion 1133a for breaking when the cap 1100 is opened and for detaching from the skirt portion 1122. That is, the tamper evidence band portion 1133 is configured by forming a slit on the end side of the skirt portion 1122 leaving the broken portion 1133a, and is integrally combined with the can container 1200 like the female screw portion 1132. Occasionally, it engages with the jaw portion 1211 by being shaped into the shape of the jaw portion 1211 of the can container 1200.

The sealing member 1112 is configured separately from the cap body 1111 and is not adhered to the cap body 1111. The sealing member 1112 has a disk shape having an outer diameter larger than the diameter of the inscribed circle of the knurl portion 1131 provided on the skirt portion 1122 of the cap body 1111. The sealing member 1112 is integrally provided on the cap body 1111 by engaging with the vent slit 1131a of the knurl portion 1131 that protrudes radially from the inner peripheral surface of the skirt portion 1122 in the axial direction of the cap body 1111.

For example, as shown in FIGS. 11, 13 and 15, the sealing member 1112 includes a disk-shaped sliding layer 1141 and a disk-shaped sealing layer 1142 integrally laminated on the sliding layer 1141. I have. In the sealing member 1112, the sliding layer 1141 and the sealing layer 1142 are made of different synthetic resins. In the sealing member 1112, the sealing layer 1142 is integrally laminated on the sliding layer 1141. For example, as shown in FIGS. 11 and 13, the sealing member 1112 includes a flat plate portion 1112a having a uniform thickness, a curved surface portion 1112b in which the outer surface of the outer peripheral edge on the top plate portion 1121 side is a curved surface, and a flat plate. It has a thick portion 1112c that is thicker than the flat plate portion 1112a provided between the portion 1112a and the curved surface portion 1112b. In other words, the sealing member 1112 has a disk shape, and the ridge portion on the top plate portion 1121 side is formed of a curved surface having a predetermined curvature. The thick portion 1112c exists in a region that abuts on the outer peripheral side mouth portion 1210 of the sealing member 1112, for example, as shown in FIG. In the thick portion 1112c, the sealing layer 1142 is thicker than the flat plate portion 1112a on the central side of the sealing member 1112, and the sliding layer 1141 has the same thickness as the flat plate portion 1112a or has a thickness. thin.

The sliding layer 1141 is made of a resin material having a relatively higher hardness (harder) than the sealing layer 1142. Further, the sliding layer 1141 is composed of a resin material having no adhesiveness and adhesiveness with the resin film layer of the cap body 1111. That is, the sliding layer 1141 is not adhered to the top plate portion 1121 and slides on the top plate portion 1121 in a state of being in contact with the top plate portion 1121.

Examples of the resin material used for the sliding layer 1141 include olefin resins such as polypropylene resin and polyethylene resin, polyester resins such as polyethylene terephthalate, styrene resins, and acrylic resins. In this embodiment, the sliding layer 1141 is made of, for example, polypropylene resin. Pigments, lubricants, softeners, plasticizers and the like can be appropriately added to the resin material used for the sliding layer 1141. Further, in the example of the present embodiment, the hardness of the sliding layer 1141 is D10 to D70 in terms of the durometer D hardness according to JIS-K7215. The hardness of the sliding layer 1141 can be changed by changing the amount of additives such as a plasticizer, copolymerizing a resin material, or blending another resin material.

As shown in FIG. 13, the sliding layer 1141 is provided separately from the cap body 1111 so as to face the top plate portion 1121 of the cap body 1111. The sliding layer 1141 is configured to be slidable with the top plate portion 1121 of the cap body 1111 depending on the resin material used. The sliding layer 1141 is formed in a disk shape. The outer diameter of the sliding layer 1141 is smaller than the inner diameter of the skirt portion 1122, is substantially the same as the inscribed circle of the knurled portion 1131 or slightly larger than the inscribed circle, and is curled portion 1213 of the mouth portion 1210. It is configured to have a larger diameter than the outer diameter of.

As shown in FIGS. 11, 13 and 15, for example, the sliding layer 1141 has a first flat plate portion 1141a having a uniform thickness and an outer surface of an outer peripheral edge on the top plate portion 1121 side formed of a curved surface. A first curved surface portion 1141b, a protrusion 1141c provided on the sealing layer 1142 side of the first curved surface portion 1141b, and a thin-walled portion 1141d provided between the first flat surface portion 1141a and the first curved surface portion 1141b are provided. ing. The thickness of the first flat plate portion 1141a is uniformly configured from the center of the sliding layer 1141 to the outer peripheral side of the portion of the mouth portion 1210 facing the curl portion 1213.

The first curved surface portion 1141b is configured such that the thickness of the portion from the outer peripheral side to the outer peripheral edge of the portion of the mouth portion 1210 facing the curl portion 1213 gradually decreases toward the outer peripheral edge. The protrusion 1141c is formed in an annular protrusion shape that is inclined with respect to the axial direction of the sliding layer 1141 and the surface direction of the top plate portion 1121 and is curved or inclined toward the opening end side of the skirt portion 1122. To. The thickness of the protruding portion 1141c gradually decreases from the first curved surface portion 1141b toward the tip end. The thin-walled portion 1141d is formed to be thinner than the first flat plate portion 1141a.

The sealing layer 1142 is made of a resin material having a relatively lower hardness (softer) than the sliding layer 1141. Examples of the resin material used for the sealing layer 1142 include olefin resin, polyester resin, styrene resin, acrylic resin and the like, and more preferably, a blend material of styrene elastomer and polypropylene resin, low density polyethylene and styrene resin. Examples thereof include elastomer blend materials and polyester-based elastomers. The resin material used for the sealing layer 1142 has adhesiveness with the resin material used for the sliding layer 1141. In the present embodiment, the sealing layer 1142 is composed of, for example, a blend material of a styrene-based elastomer and a polypropylene resin. Pigments, lubricants, softeners, plasticizers and the like can be appropriately added to the resin material used for the sealing layer 1142.

The sealing layer 1142 is integrally provided on the main surface of the sliding layer 1141 on the side facing the mouth portion 1210. The sealing layer 1142 is formed in a disk shape. The outer diameter of the sealing layer 1142 is smaller than the inner diameter of the skirt portion 1122, is substantially the same as the inscribed circle of the knurl portion 1131 or slightly larger than the inscribed circle, and is curled portion 1213 of the mouth portion 1210. It is configured to have a larger diameter than the outer diameter of. That is, the outer diameter of the sealing layer 1142 is the same as the outer diameter of the sliding layer 1141, or is configured to be larger than the outer diameter of the sliding layer 1141.

As shown in FIGS. 11, 13 and 15, the sealing layer 1142 has a second flat surface portion 1142a having a uniform thickness and a second curved surface in which the outer surface of the outer peripheral edge on the top plate portion 1121 side is a curved surface. Thickness provided between the portion 1142b, the annular recess 1142c provided on the main surface of the second curved surface portion 1142b opposite to the sliding layer 1141 side, and the second flat plate portion 1142a and the second curved surface portion 1142b. It is provided with a meat portion 1142d. The main surface of the second flat plate portion 1142a facing the curl portion 1213 is formed to be flat. For example, the second flat plate portion 1142a is configured to have the same diameter as the first flat plate portion 1141a of the sliding layer 1141. The second flat plate portion 1142a, together with the first flat plate portion 1141a, constitutes the flat plate portion 1112a of the sealing member 1112. In this embodiment, the first flat plate portion 1141a and the second flat plate portion 1142a are set to have the same thickness.

The second curved surface portion 1142b has, for example, a main surface flush with the main surface of the second flat plate portion 1142a facing the curl portion 1213. The second curved surface portion 1142b is configured such that the thickness of the portion of the mouth portion 1210 from the outer peripheral side to the outer peripheral edge of the portion facing the curl portion 1213 is gradually reduced toward the outer peripheral edge. The second curved surface portion 1142b is laminated on the first curved surface portion 1141b and the protrusion 1141c. The second curved surface portion 1142b, together with the first curved surface portion 1141b and the protrusion 1141c, constitutes the curved surface portion 1112b of the sealing member 1112.

The recess 1142c is in contact with the vent slit 1131a when the cap 1100 is arranged with the top plate portion 1121 facing upward and the sealing member 1112 falls below the top plate portion 1121. The recess 1142c is, for example, an annular recess having a semicircular cross section. The thick portion 1142d is formed to be thicker than the second flat plate portion 1142a and the thin portion 1141d. The thick portion 1142d, together with the thin portion 1141d, constitutes the thick portion 1112c of the sealing member 1112.

The sliding layer 1141 and the sealing layer 1142 are configured such that the first curved surface portion 1141b, the protruding portion 1141c, and the second curved surface portion 1142b are thinner than the first flat plate portion 1141a and the second flat plate portion 1142a, respectively.

Such a sealing member 1112 has, for example, a part thereof having the same shape as the recess 1121a provided in the top plate portion 1121 from the sliding layer 1141 side (main surface side facing the top plate portion 121) to the sealing layer 1142 side. It has a deformed portion 1112d that is recessed on the sliding layer 1141 side and protrudes on the sealing layer 1142 side. The deformed portion 1112d is plastically deformed, and the shape of the deformed portion 1112d is maintained even when it is not in contact with the recess 1121a. Depending on the thickness of the sealing member 1112, the hardness of the material, and the like, the deformed portion 1112d may have a smaller degree of protrusion on the sealing layer 1142 side than the depth of the recess on the sliding layer 1141 side. Further, the deformed portion 112d is only recessed on the sliding layer 1141 side and does not have to protrude on the sealing layer 1142 side. That is, only the sliding layer 1141 may be deformed.

Further, the resin material used for the sealing member 1112, that is, the resin material used for the sliding layer 1141 and the sealing layer 1142, is, for example, the container 1001 in which the cap 1100 is covered with the can container 1200 and the contents are filled. A resin that can form a deformed portion 1112d on a sealing member 1112 by being heated by the internal pressure and temperature of the container 1001 and in close contact with the recess 1121a of the top plate portion 1121 in an environment where heat sterilization treatment such as retort treatment is performed. The material is used.

An example of the manufacturing method of the cap 1100 and the manufacturing method of the container 1001 configured as described above will be described with reference to FIGS. 17 and 18.

First, a method of manufacturing the cap 1100 will be described with reference to FIG. As the manufacturing apparatus used for manufacturing the cap 1100, the manufacturing apparatus 1 according to the first embodiment described above can be used. For example, a cylindrical skirt in which a sheet-shaped metal material is squeezed by a shell press device of a manufacturing apparatus, and the top plate portion 1121, the knurl portion 1131, the female screw portion 1132, and the tamper evidence band portion 1133 are not formed. A cup-shaped molded product composed of the portion 1122 and the corner portion 1123 is formed (step ST1). Next, the sliding layer 1141 is molded by supplying the softened resin material onto the inner surface of the top plate portion 1121 of the molded product by the sliding layer molding apparatus and shaping the supplied resin material (step ST2).

Next, the sealed layer 1142 is molded by supplying the softened resin material onto the sliding layer 1141 in the molded product by the sealing layer molding apparatus and shaping the supplied resin material (step ST3). As a result, the sealing member 1112 is molded in the molded product.

Next, the sealing member 1112 in the molded product is taken out by a transport device or the like that conveys the sealing member (step ST4). Next, the first molding is performed by molding the skirt portion 1122 of the molded product with the knurl portion 1131 and the tamper evidence band portion 1133 using a molded product processing device or the like (step ST5). Next, a second molding is performed in which the recess 1121a is molded in the top plate portion 1121 by a molded product processing device or the like (step ST6). The first molding and the second molding may be performed at the same time, or the order may be reversed. The cap body 1111 is formed by these steps.

Next, the sealing member 1112 is inserted into the cap body 1111 by a transport device or the like (step ST7). At this time, the peripheral edge portion of the sealing member 1112 is inserted so as to get over the vent slit 1131a and come into contact with the top plate portion 1121. The sealing member 1112 inserted into the cap body 1111 may be a sealing member 1112 molded by another cap body 1111 or may be a sealing member 1112 molded inside itself.

The cap 1100 is manufactured by inserting the sealing member 1112 into the cap body 1111. Next, when the cap 1100 is collected in the collecting unit and a certain number of caps 1100 are collected in the collecting unit, the cap 1100 is transported to the inspection / packing process, which is the next process.

Next, a method for manufacturing the container 1001 will be described with reference to FIG. First, the can container 1200 is filled with contents such as a beverage and liquid nitrogen (step ST11). Next, the can container 1200 is covered with the cap 1100 and the cap 1100 is placed on the can container 1200 so that the curl portion 1213 which is the tip of the mouth portion 1210 of the can container 1200 and the sealing layer 1142 of the sealing member 1112 come into contact with each other. (Step ST12).

Next, the cap 1100 is wound and fixed to the mouth portion 1210 of the can container 1200 (step ST13). In the winding and fixing, a load is applied to the top plate portion 1121 of the cap body 1111 and the skirt portion 1122 is roll-on molded while the corner portion 1123 is drawn toward the can container 1200 to form the skirt portion 1122 of the cap 1100. This is done by molding the female screw portion 1132. As a result, the can container 1200 is sealed. At this time, the pressure inside the can container 1200 becomes positive.

Next, in order to sterilize the can container 1200, the container 1001 in which the cap 1100 is wound and fixed to the can container 1200 is retort-treated (step ST14). The conditions of the retort treatment vary depending on the contents. For example, the retort treatment is performed at a temperature of 110 ° C. to 130 ° C. and a time range of 10 minutes to 30 minutes. After the retort treatment, the container 1001 is cooled (step ST15) and dried (step ST16) to produce a container 1001 which is a positive pressure can filled with a beverage. During the retort treatment, the sealing member 1112 is heated and pressurized, and then cooled to transfer the shape of the recess 1121a to form the deformed portion 1112d. Further, cooling and drying may be performed in the same process. Further, as the sterilization treatment of the can container 1200, the contents are hot-filled at a high temperature of about 70 ° C. to 95 ° C. instead of the retort treatment, and the can container 1200 is sterilized by lying down, or the can container 1200 is sterilized. It may be sterilized by sprinkling hot water at about 70 ° C. to 95 ° C. The deformed portion 1112d can also be formed by heating the cap 1100 by such a sterilization treatment.

According to the cap 1100 and the container 1001 configured in this way, the flat plate portion 1121b of the top plate portion 1121 is provided with a recess 1121a protruding from the inner surface. That is, the recess 1121a of the top plate portion 1121 projects toward the can container 1200 side when the cap 1100 is crowned. The recess 1121a is formed at a predetermined height. Therefore, when the cap body 1111 is rotated when the cap 1100 is rotated to open the container 1001, the recess 1121a is displaced from the position before the rotation of the cap body 1111. Therefore, since the displaced recess 1121a presses other than the flat plate portion 1112a adjacent to the deformed portion 1112d of the sealing member 1112 in the circumferential direction, the recess 1121a presses the sealing member 1112 toward the mouth portion 1210.

More specifically, as shown in FIGS. 12, 14 and 16, the recess 1121a has a flat plate portion 1121b partially present in the circumferential direction of the cap body 1111. Further, since the deformed portion 1112d has the same shape as the concave portion 1121a, as shown in FIG. 16, a flat plate portion 1112a is partially present in the circumferential direction of the cap body 1111. Further, as shown in FIG. 13, since the sealing member 1112 is not in contact with the cap body 1111, the sealing member 1112 does not rotate even if the cap body 1111 covered with the can container 1200 rotates, and the top plate. The recess 1121a of the portion 1121 and the deformed portion 1112d of the sealing member 1112 rotate relatively, and as shown in FIG. 16, the recess 1121a is displaced with respect to the deformed portion 1112d. Note that FIG. 16 shows a state in which the cap body 1111 is rotated by 36 ° with respect to the sealing member 1112.

As shown in FIG. 16, when the recess 1121a is displaced with respect to the deformed portion 1112d, the recess 1121a of the top plate portion 1121 faces the flat plate portion 1112a of the sealing member 1112 located in the circumferential direction of the deformed portion 1112d. The flat plate portion 1112a is pressed toward the mouth portion 1210. Therefore, even if the cap body 1111 rotates and separates from the mouth portion 1210, the recess 1121a presses the sealing member 1112 toward the mouth portion 1210 while the cap body 1111 rotates within a predetermined angle range, so that the sealing member 1111 is sealed. The mouth portion 1210 is maintained in a sealed state by the member 1112.

Further, since the cap 1100 can maintain the sealing property for a long time when the can container 1200 is opened by rotating the cap main body 1111 as compared with the configuration in which the recess 1121a is not provided, the mouth portion of the can container 1200 can be maintained. Sealability to 1210 can be ensured. For example, in the case of the star-shaped recess 1121a and the deformed portion 1112d shown in FIG. 16, the cap body 1111 rotates 72 ° with respect to the sealing member 1112, or the amount of movement of the cap body 1111 in the axial direction is the recess. The recess 1121a presses the sealing member 1112 until it exceeds the height of 1121a, and the sealing property can be ensured.

Therefore, the container 1001 can improve the so-called tamper evidence (TE) property, which is the sealing property with respect to the rotation angle of the cap body 1111.

Further, the cap body 1111 may have a simple structure in which the recess 1121a is formed in the top plate portion 1121, and when the sealing member 1112 is provided with the deformed portion 1112d, the cap body 1111 is deformed into the sealing member 1112 by the treatment after being crowned. The structure may be such that the portion 1112d is formed. Therefore, even if the sealing property is ensured by the recess 1121a, it is possible to suppress an increase in the manufacturing method of the cap 1100.

As described above, according to the cap 1100 and the container 1001 provided with the cap 1100 according to the second embodiment of the present invention, the sealing property can be ensured without increasing the manufacturing cost. That is, the cap 1100 can improve the function of the sealing member 1112.

The present invention is not limited to the above-described embodiment. For example, in the above-mentioned example, the structure in which the sealing member 1112 has two layers of the sliding layer 1141 and the sealing layer 1142 has been described, but the present invention is not limited to this, and the sealing member 1112 may be a single layer, or may have three or more layers. It may have a structure. Further, the shape of the sealing member 1112 can be appropriately set. Further, an example in which the deformed portion 1112d of the sealing member 1112 is formed by the retort treatment has been described, but the present invention is not limited to this, and the deformed portion 1112d may be formed by the internal pressure of the container 1001 or formed by heating in a store as a hot beverage. You may.

Further, in the above-described example, the example in which the deformed portion 1112d is formed on the sealing member 1112 has been described, but the present invention is not limited to this, and the flat plate portion 1112a may not have the deformed portion 1112d. In other words, the sealing member 1112 may be pressed so as to be elastically deformed by the recess 1121a in a state where the cap 1100 is wound and fixed to the mouth portion 1210. Even with such a configuration, the same effect can be obtained because the sealing member 1112 seals the mouth portion 1210 while the recess 1121a presses the flat plate portion 1112a of the sealing member 1112.

Further, a configuration having a convex portion such as Braille may be provided in addition to the concave portion 1121a, or the concave portion 1121a or the convex portion may be provided with information, distinctiveness, design, or the like.

(Third Embodiment)
Hereinafter, the cap 2100 and the container 2001 according to the third embodiment of the present invention will be described with reference to FIGS. 19 to 24.
FIG. 19 is a side view showing a structure of the container 2001 according to the embodiment of the present invention in a partial cross section. FIG. 20 is a perspective view showing the configuration of the cap 2100. FIG. 21 is a side view showing the configuration of the cap 2100 in a partial cross section. FIG. 22 is a plan view showing the configuration of the cap 2100. FIG. 23 is an enlarged cross-sectional view showing the cap body 2111 and the sealing member 2112 of the cap 2100. FIG. 24 is a plan view showing the configuration of the sealing member 2112 from the sliding layer 2141 side.

As shown in FIG. 19, the container 2001 includes a cap 2100 and a can container 2200 sealed by the cap 2100. The container 2001 is a positive pressure can filled with a beverage by sealing the can container 2200 filled with the beverage with a cap 2100. The positive pressure can has an internal pressure higher than that of the atmospheric pressure, and is produced by making the beverage itself a beverage filled with a gas such as carbonic acid or by filling the beverage with liquid nitrogen.

First, the can container 2200 to which the cap 2100 is crowned will be described with reference to FIG. As shown in FIG. 19, the can container 2200 is a so-called bottle-type container for accommodating beverages and the like. For example, the can container 2200 is made of a metal material such as an aluminum alloy or a surface-treated steel plate in which resin films are laminated on both sides. The can container 2200 is formed in a cylindrical shape having a different outer diameter with one end reduced in diameter. The can container 2200 has a mouth portion 2210 at one end for discharging the contained beverage. The mouth portion 2210 has a jaw portion 2211, a male screw portion 2212, and a curl portion 2213 on the outer peripheral surface thereof from the bottom surface side to the end portion of the can container 2200.

The jaw portion 2211 is configured to project in an annular shape. The curl portion 2213 is formed to have a smaller diameter than the male screw portion 2212. Further, the curl portion 2213 is configured to be smaller than the inner diameter of the cap 2100. The curl portion 2213 is formed by bending the end portion of the mouth portion 2210 one or more times. The curl portion 2213 constitutes an opening for discharging the beverage stored in the can container 2200.

Next, the cap 2100 according to the present embodiment will be described. As shown in FIGS. 19 to 23, the cap 2100 includes a cap main body 2111 and a sealing member 2112 separately provided in the cap main body 2111.

The cap body 2111 is made of a material in which a resin film layer is formed on a metal material such as an aluminum alloy. The cap body 2111 is formed into a cup shape by drawing, knurling, roll-on, press-molding, or the like, a thin flat plate-shaped material.

The cap body 2111 includes a disk-shaped top plate portion 2121 and a cylindrical skirt portion 2122 hanging from the peripheral edge portion of the top plate portion 2121. In the cap body 2111, the top plate portion 2121 and the skirt portion 2122 are integrally and continuously formed by an annular and curved corner portion 2123.

The top plate portion 2121 is configured in a disk shape. As shown in FIGS. 19 to 23, the top plate portion 2121 has a flat main surface and has an uneven portion 2121a as a part thereof. The uneven portion 2121a is formed, for example, by press-molding a part of the top plate portion 2121. The uneven portion 2121a is formed by at least one of a concave portion and a convex portion provided in a part of the top plate portion 2121. That is, the uneven portion 2121a is formed by performing at least one of embossing and debossing.

The uneven portion 2121a is provided, for example, to allow the cap body 2111 to have information such as functionality such as Braille and product information display and design such as design. That is, the uneven portion 2121a improves the function of the cap main body 2111 by giving the top plate portion 2121 various information and design characteristics. In the present embodiment, as shown in FIGS. 20 and 22, the uneven portion 2121a will be described with reference to an example formed by a star-shaped concave portion recessed from the outer surface side of the top plate portion 2121. In other words, the depth of the uneven portion 2121a is, in other words, the height of the top plate portion 2121 from the inner surface is, for example, 0.05 mm to 2 mm.

The skirt portion 2122 is configured such that one end is continuous with the top plate portion 2121 via the corner portion 2123 and the other end is open. The skirt portion 2122 includes a plurality of knurled portions 2131 having a vent slit 2131a, a female screw portion 2132, and a tamper evidence band portion 2133 from the end portion on the top plate portion 2121 side to the opening portion.

The knurled portion 2131, the female screw portion 2132 and the tamper evidence band portion 2133 have a top plate portion 2121, a knurled portion 2131, a female screw portion 2132 and a cylindrical skirt portion 2122 in which the tamper evidence band portion 2133 is not formed, and a corner. A cup-shaped molded product composed of parts 2123 is formed by processing such as nerling molding or roll-on molding.

The knurl portion 2131 has a plurality of vent slits 2131a and protrudes from the inner peripheral surface of the skirt portion 2122. The vent slit 2131a is a notch for discharging the gas in the can container 2200 when opened. The vent slit 2131a is provided in a part of the knurled portion 2131, and includes an uneven portion recessed from the outer surface side to the inner surface side, and a notch for gas discharge provided at the upper end portion of the uneven portion.

The end of the vent slit 2131a on the notch side (the other end side of the skirt portion 2122) protrudes inward in the radial direction of the cap 2100 from the end on the other side. The plurality of vent slits 2131a form a locking portion in which the non-adhesive sealing member 2112 is locked to the cap body 2111 by the end portion on the notch side, and the sealing member 2112 is held in the cap body 2111.

The female screw portion 2132 is configured to be screwable with the male screw portion 2212 of the can container 2200. The female screw portion 2132 is formed together with the can container 2200. That is, the female screw portion 2132 is not formed in the finished product of the cap 2100 before being attached to the can container 2200, but is formed when it is integrally combined with the can container 2200.

The tamper evidence band portion 2133 engages with the jaw portion 2211 of the can container 2200 in the direction in which the cap 2100 is separated from the can container 2200 and in the axial direction of the cap 2100. Further, the tamper evidence band portion 2133 has a broken portion 2133a for breaking when the cap 2100 is opened and detaching from the skirt portion 2122. That is, the tamper evidence band portion 2133 is configured by forming a slit leaving the broken portion 2133a on the end side of the skirt portion 2122, and is integrally combined with the can container 2200 like the female screw portion 2132. Occasionally, it engages with the jaw 2211 by being shaped into the shape of the jaw 2211 of the can container 2200.

The sealing member 2112 is configured separately from the cap body 2111 and is not adhered to the cap body 2111. The sealing member 2112 has a disk shape having an outer diameter larger than the diameter of the inscribed circle of the knurl portion 2131 provided on the skirt portion 2122 of the cap body 2111. The sealing member 2112 is integrally provided with the cap body 2111 by engaging with the vent slit 2131a of the knurl portion 2131 protruding in the radial direction from the inner peripheral surface of the skirt portion 2122 in the axial direction of the cap body 2111.

For example, as shown in FIGS. 19, 21 and 23, the sealing member 2112 includes a disc-shaped sliding layer 2141 and a disc-shaped sealing layer 2142 integrally laminated on the sliding layer 2141. I have. In the sealing member 2112, the sliding layer 2141 and the sealing layer 2142 are formed of different synthetic resins. In the sealing member 2112, the sealing layer 2142 is integrally laminated on the sliding layer 2141. For example, as shown in FIGS. 19 and 21, the sealing member 2112 includes a flat plate portion 2112a having a uniform thickness, a curved surface portion 2112b in which the outer surface of the outer peripheral edge on the top plate portion 2121 side is a curved surface, and a flat plate. It has a thick portion 2112c that is thicker than the flat plate portion 2112a provided between the portion 2112a and the curved surface portion 2112b. In other words, the sealing member 2112 has a disk shape, and the ridge portion on the top plate portion 2121 side is formed of a curved surface having a predetermined curvature. The thick portion 2112c exists in a region that abuts on the outer peripheral side mouth portion 2210 of the sealing member 2112, for example, as shown in FIG. In the thick portion 2112c, the sealing layer 2142 is thicker than the flat plate portion 2112a on the central side of the sealing member 2112, and the sliding layer 2141 has the same thickness as the flat plate portion 2112a or has a thickness. thin.

The sliding layer 2141 is made of a resin material having a relatively higher hardness (harder) than the sealing layer 2142. Further, the sliding layer 2141 is made of a resin material that does not have adhesiveness and adhesiveness with the resin film layer of the cap body 2111. That is, the sliding layer 2141 is not adhered to the top plate portion 2121 and slides on the top plate portion 2121 in a state of being in contact with the top plate portion 2121.

Examples of the resin material used for the sliding layer 2141 include olefin resins such as polypropylene resin and polyethylene resin, polyester resins such as polyethylene terephthalate, styrene resins, and acrylic resins. In the present embodiment, the sliding layer 2141 is made of, for example, polypropylene resin. Pigments, lubricants, softeners, plasticizers and the like can be appropriately added to the resin material used for the sliding layer 2141. Further, in the example of the present embodiment, the hardness of the sliding layer 141 is D10 to D70 in terms of the durometer D hardness according to JIS-K7215. This is because if the durometer D hardness is smaller than D10, the top plate portion 2121 and the sliding layer 2141 may be too close to each other, the slipperiness of the sliding layer 2141 may be lowered, and the opening property may be lowered. is there. Further, when the durometer D hardness is larger than D70, the closeness between the top plate portion 2121 and the corner portion 2123 of the cap body 2111 and the sliding layer 2141 becomes insufficient, and the cap body 2111 and the sliding layer 2141 are sealed. This is because the performance is deteriorated and it is not possible to sufficiently prevent water generated in the retort treatment or the like from entering between the top plate portion 2121 and the sliding layer 2141. In the present embodiment, the sealing member 2112 has a structure in which the sliding layer 2141 includes the sealing layer 2142 without sealing the mouth portion 2210. Therefore, considering the sealing performance of the cap body 2111 and the sliding layer 2141 and the slipperiness of the sliding layer 2141, the hardness of the sliding layer 2141 is more preferably D40 to D65 in terms of the durometer D hardness according to JIS-K7215. is there. The hardness of the sliding layer 2141 can be changed by changing the amount of additives such as plasticizers, copolymerizing the resin material, or blending with other resin materials.

As shown in FIG. 21, the sliding layer 2141 is provided separately from the cap body 2111 so as to face the top plate portion 2121 of the cap body 2111. The sliding layer 2141 is configured to be slidable with the top plate portion 2121 of the cap body 2111 depending on the resin material used. The sliding layer 2141 is formed in a disk shape. The outer diameter of the sliding layer 2141 is smaller than the inner diameter of the skirt portion 2122, substantially the same diameter as the inscribed circle of the knurl portion 2131, or slightly larger than the inscribed circle, and the curl portion 2213 of the mouth portion 2210. It is configured to have a larger diameter than the outer diameter of.

As shown in FIGS. 19, 21 and 23, the sliding layer 2141 is composed of, for example, a first flat plate portion 2141a having a uniform thickness and an outer surface of an outer peripheral edge on the top plate portion 2121 side formed by a curved surface. A first curved surface portion 2141b, a protruding portion 2141c provided on the sealing layer 2142 side of the first curved surface portion 2141b, and a thin-walled portion 2141d provided between the first flat surface portion 2141a and the first curved surface portion 2141b are provided. ing. The thickness of the first flat plate portion 2141a is uniformly configured from the center of the sliding layer 2141 to the outer peripheral side of the portion of the mouth portion 2210 facing the curl portion 2213.

The first curved surface portion 2141b is configured such that the thickness of the portion from the outer peripheral side to the outer peripheral edge of the mouth portion 2210 facing the curl portion 2213 is gradually reduced toward the outer peripheral edge. The protrusion 2141c is formed in an annular protrusion shape that is inclined with respect to the axial direction of the sliding layer 2141 and the surface direction of the top plate 2121 and is curved or inclined toward the opening end side of the skirt portion 2122. To. The thickness of the protrusion 2141c gradually decreases from the first curved surface portion 2141b toward the tip. The thin-walled portion 2141d is formed to be thinner than the first flat plate portion 2141a.

The sealing layer 2142 is made of a resin material having a relatively lower hardness (softer) than the sliding layer 2141. Examples of the resin material used for the sealing layer 2142 include olefin resin, polyester resin, styrene resin, acrylic resin and the like, and more preferably, a blend material of styrene elastomer and polypropylene resin, low density polyethylene and styrene resin. Examples thereof include elastomer blend materials and polyester-based elastomers. The resin material used for the sealing layer 2142 has adhesiveness with the resin material used for the sliding layer 2141. In the present embodiment, the sealing layer 2142 is composed of, for example, a blend material of a styrene-based elastomer and a polypropylene resin. Pigments, lubricants, softeners, plasticizers and the like can be appropriately added to the resin material used for the sealing layer 2142.

The sealing layer 2142 is integrally provided on the main surface of the sliding layer 2141 on the side facing the mouth portion 2210. The sealing layer 2142 is formed in a disk shape. The outer diameter of the sealing layer 2142 is smaller than the inner diameter of the skirt portion 2122, substantially the same diameter as the inscribed circle of the knurl portion 2131, or slightly larger than the inscribed circle, and the curl portion 2213 of the mouth portion 2210. It is configured to have a larger diameter than the outer diameter of. That is, the outer diameter of the sealing layer 2142 is the same as the outer diameter of the sliding layer 2141 or is configured to be larger than the outer diameter of the sliding layer 2141.

As shown in FIGS. 19, 21 and 23, the sealing layer 2142 has a second flat surface portion 2142a having a uniform thickness and a second curved surface in which the outer surface of the outer peripheral edge on the top plate portion 2121 side is a curved surface. Thickness provided between the portion 2142b, the annular recess 2142c provided on the main surface of the second curved surface portion 2142b opposite to the sliding layer 2141 side, and the second flat plate portion 2142a and the second curved surface portion 2142b. It has a meat part 2142d. The main surface of the second flat plate portion 2142a facing the curl portion 2213 is formed to be flat. For example, the second flat plate portion 2142a is configured to have the same diameter as the first flat plate portion 2141a of the sliding layer 2141. The second flat plate portion 2142a, together with the first flat plate portion 2141a, constitutes the flat plate portion 2112a of the sealing member 2112. In this embodiment, the first flat plate portion 2141a and the second flat plate portion 2142a are set to have the same thickness.

The second curved surface portion 2142b has, for example, a main surface flush with the main surface facing the curl portion 2213 of the second flat plate portion 2142a. The second curved surface portion 2142b is configured such that the thickness of the portion of the mouth portion 2210 from the outer peripheral side to the outer peripheral edge of the portion facing the curl portion 2213 is gradually reduced toward the outer peripheral edge. The second curved surface portion 2142b is laminated on the first curved surface portion 2141b and the protrusion 2141c. The second curved surface portion 2142b, together with the first curved surface portion 2141b and the protrusion portion 2141c, constitutes the curved surface portion 2112b of the sealing member 2112.

The recess 2142c is in contact with the vent slit 2131a when the cap 2100 is arranged with the top plate portion 2121 facing upward and the sealing member 2112 falls below the top plate portion 2121. The recess 2142c is, for example, an annular recess having a semicircular cross section. The thick portion 2142d is formed to be thicker than the second flat plate portion 2142a and the thin wall portion 2141d. The thick portion 2142d, together with the thin portion 2141d, constitutes the thick portion 2112c of the sealing member 2112.

The sliding layer 2141 and the sealing layer 2142 are configured such that the first curved surface portion 2141b, the protruding portion 2141c and the second curved surface portion 2142b are thinner than the first flat plate portion 2141a and the second flat plate portion 2142a, respectively.

As shown in FIG. 24, such a sealing member 2112 has a deformed portion 2112d in which the sliding layer 2141 and the sealing layer 2142 are unevenly formed in a part thereof having the same shape as the uneven portion 2121a provided on the top plate portion 2121. Has. The deformed portion 2112d is plastically deformed, and the shape of the deformed portion 2112d is maintained even when it is not in contact with the uneven portion 2121a. Depending on the thickness of the sealing member 2112, the hardness of the material, and the like, the deformed portion 2112d may have a smaller degree of protrusion on the sealing layer 2142 side than the depth of the recess on the sliding layer 2141 side. Further, the deformed portion 2112d is only recessed on the sliding layer 2141 side and does not have to protrude on the sealing layer 2142 side. That is, only the sliding layer 2141 may be deformed.

Further, the resin material used for the sealing member 2112, that is, the resin material used for the sliding layer 2141 and the sealing layer 2142, is, for example, the container 1 in which the cap 2100 is covered with the can container 2200 and the contents are filled. In an environment where heat sterilization treatment such as retort treatment is performed, the deformed portion 2112d can be formed on the sealing member 2112 by being heated by the internal pressure and temperature of the container 2001 and being brought into close contact with the uneven portion 2121a of the top plate portion 2121. A resin material is used.

In the method of capping the cap 2100 to the mouth portion 2210 of the can container 2200 configured in this manner, for example, the curl portion 2213 which is the tip end portion of the mouth portion 2210 of the can container 2200 and the sealing layer 2142 of the sealing member 2112 come into contact with each other. The cap 2100 is put on the mouth portion 2210 of the can container 2200 so as to do so. In this state, a load is applied to the top plate portion 2121 of the cap body 2111, and the skirt portion 2122 is roll-on molded while the corner portion 2123 is drawn downward (can container 2200). As a result, as shown in FIG. 19, a female screw portion 2132 is formed on the skirt portion 2122 of the cap 2100, and the cap 2100 is wound and fixed to the mouth portion 2210 of the can container 2200. In addition, such a capping method is performed in a state where the beverage is filled in the can container 2200. Further, for example, the can container 2200 in which the cap 2100 is capped is retorted, for example.

According to the cap 2100 configured in this way, the portion of the sealing member 2112 that comes into contact with the cap body 2111, and in this embodiment, the durometer D hardness of the sliding layer 2141 is within the range of D10 to D70. Therefore, the sealing member 2112 has a relatively soft structure so as to be in close contact with the top plate portion 2121 and the corner portion 2123 of the cap body 2111 and follow the shape.

Therefore, when the cap 2100 is crowned on the mouth portion 2210 and fixed by winding, the sealing member 2112 comes into close contact with the top plate portion 2121 and the corner portion 2123 of the cap body 2111. As a result, the cap body 2111 and the sealing member 2112 are sealed, and even if steam or treated water intrudes from the vent slit 2131a due to retort treatment or the like, it is possible to prevent water from entering between the cap body 2111 and the sealing member 2112. ..

In particular, when the top plate portion 2121 is provided with the uneven portion 2121a, a gap is likely to occur between the vicinity of the uneven portion 2121a of the top plate portion 2121 and the sealing member 2112, but the sealing member 2112 has the above configuration. Therefore, it is possible to prevent water from entering this gap.

Further, by setting the durometer D hardness of the sliding layer 2141 of the sealing member 2112 within the above range, even if the sliding layer 2141 adheres to the cap body 2111 as described above, the sliding layer with respect to the cap body 2111 The slipperiness of 2141 can be maintained. Therefore, the cap 2100 can maintain a high opening property. By setting the more preferable durometer D hardness of the sliding layer 2141 to be within the range of D40 to D65, the sealing performance between the cap body 2111 and the sliding layer 2141 is ensured, and the required slipperiness of the sliding layer 2141 is ensured. Can be made more suitable.

Further, since the sealing layer 2142 of the sealing member 2112 is formed of a resin material having a hardness relatively lower than that of the sliding layer 2141, the sealing property with the mouth portion 2210 can be maintained. In addition, since the sealing member 2112 can control the adhesion and slipperiness with the cap body 2111 by the sliding layer 2141 and the adhesion with the mouth portion 2210 by the sealing layer 2142, a suitable cap 2100 can be easily manufactured. can do.

Further, the sealing member 2112 may have a simple structure for controlling the durometer D hardness after molding of the material of the sliding layer 2141, and does not increase the manufacturing cost.

As described above, according to the cap 2100 according to the third embodiment of the present invention, the sealability of the cap body 2111 and the sealing member 2112, and the sealing member 2112 and the mouth portion 2210 is ensured without increasing the manufacturing cost. it can. That is, the cap 2100 can improve the function of the sealing member 1112.

The present invention is not limited to the above-described embodiment. For example, in the above-described example, the sealing member 2112 has been described as having two layers, a sliding layer 2141 and a sealing layer 2142, but the sealing member 2112 is not limited thereto. That is, the sealing member 2112 is a single layer if at least the durometer D hardness of the portion in contact with the cap body 2111 is set within the range of D10 to D70, more preferably within the range of D40 to D65. It may be configured to have three or more layers, and the shape can be appropriately set. Further, in the above-described example, the cap 2100 has a configuration in which the top plate portion 2121 has an uneven portion 2121a and the sealing member 2112 has a deformed portion 2112d having a shape corresponding to the uneven portion 2121a, but the present invention is not limited thereto. The top plate portion 2121 may have an uneven portion 2121a and the sealing member 2112 may not have a deformed portion 2112d, and the deformed portion 2112d of the sealing member 2112 may be molded by a molding method other than the above-described molding method. You may be.

(Fourth Embodiment)
Hereinafter, the cap 3100 and the container 1 according to the fourth embodiment of the present invention will be described with reference to FIGS. 25 to 32.
FIG. 25 is a side view showing a structure of the container 1 according to the embodiment of the present invention in a partial cross section. FIG. 26 is a perspective view showing the configuration of the cap 3100. FIG. 27 is a side view showing the configuration of the cap 3100 in a partial cross section. FIG. 28 is a plan view showing the configuration of the cap 3100. FIG. 29 is an enlarged cross-sectional view showing the cap body 3111 and the sealing member 3112 of the cap 3100. FIG. 30 is a plan view showing the configuration of the sealing member 3112 from the sliding layer 3141 side. FIG. 31 is a flow chart showing an example of a manufacturing method of the cap 3100, and FIG. 32 is a flow chart showing an example of a manufacturing method of the container 3001.

As shown in FIG. 25, the container 3001 includes a cap 3100 and a can container 3200 sealed by the cap 3100. The container 3001 is a positive pressure can filled with a beverage by sealing the can container 3200 filled with the beverage with a cap 3100. The positive pressure can has an internal pressure higher than that of the atmospheric pressure, and is produced by making the beverage itself a beverage filled with a gas such as carbonic acid or by filling the beverage with liquid nitrogen.

First, the can container 3200 to which the cap 3100 is crowned will be described with reference to FIG. 25. As shown in FIG. 25, the can container 3200 is a so-called bottle-type container for accommodating beverages and the like. For example, the can container 3200 is made of a metal material such as an aluminum alloy or a surface-treated steel plate in which resin films are laminated on both sides. The can container 3200 is formed in a cylindrical shape having a different outer diameter with one end reduced in diameter. The can container 3200 has a mouth portion 3210 at one end for discharging the contained beverage. The mouth portion 3210 has a jaw portion 3211, a male screw portion 3212, and a curl portion 3213 on the outer peripheral surface thereof from the bottom surface side to the end portion of the can container 3200.

The jaw 3211 is configured to project in an annular shape. The curl portion 3213 is formed to have a smaller diameter than the male screw portion 3212. Further, the curl portion 3213 is configured to be smaller than the inner diameter of the cap 3100. The curl portion 3213 is formed by bending the end portion of the mouth portion 3210 one or more times. The curl portion 3213 constitutes an opening for discharging the beverage stored in the can container 3200.

Next, the cap 3100 according to this embodiment will be described. As shown in FIGS. 25 to 29, the cap 3100 includes a cap main body 3111 and a sealing member 3112 separately provided in the cap main body 3111.

The cap body 3111 is made of a material in which a resin film layer is formed on a metal material such as an aluminum alloy. The cap body 3111 is formed in a cup shape by drawing, knurling, roll-on, press-molding, or the like, a thin flat plate-shaped material.

The cap body 3111 includes a disk-shaped top plate portion 3121 and a cylindrical skirt portion 3122 hanging from the peripheral edge portion of the top plate portion 3121. In the cap body 3111, the top plate portion 3121 and the skirt portion 3122 are integrally and continuously formed by an annular and curved corner portion 3123.

The top plate portion 3121 is configured in a disk shape. As shown in FIGS. 25 to 29, the top plate portion 3121 has a flat main surface and has an uneven portion 3121a as a part thereof. The uneven portion 3121a is formed, for example, by press-molding a part of the top plate portion 3121. The uneven portion 3121a is formed by at least one of a concave portion and a convex portion provided in a part of the top plate portion 3121. That is, the uneven portion 3121a is formed by performing at least one of embossing and debossing.

The concavo-convex portion 3121a is provided, for example, to allow the cap body 3111 to have information such as functionality such as Braille and product information and design such as design. That is, the uneven portion 3121a improves the function of the sealing member 3112 by giving the top plate portion 3121 various information and design properties.
In the present embodiment, as shown in FIGS. 25 and 27, the uneven portion 3121a will be described with reference to an example formed by a star-shaped concave portion recessed from the outer surface side of the top plate portion 3121. In other words, the depth of the uneven portion 3121a is, in other words, the height of the top plate portion 3121 from the inner surface is, for example, 0.05 mm to 2 mm.

The skirt portion 3122 is configured such that one end is continuous with the top plate portion 3121 via the corner portion 3123 and the other end is open. The skirt portion 3122 includes a plurality of knurled portions 3131 having a vent slit 3131a, a female screw portion 3132, and a tamper evidence band portion 3133 from the end portion on the top plate portion 3121 side to the opening portion.

The knurled portion 3131, the female screw portion 3132 and the tamper evidence band portion 3133 have a top plate portion 3121, a knurled portion 3131, a female screw portion 3132 and a cylindrical skirt portion 3122 in which the tamper evidence band portion 3133 is not formed, and a corner. A cup-shaped molded product composed of parts 3123 is formed by processing such as knurling molding or roll-on molding.

The knurl portion 3131 has a plurality of vent slits 3131a and protrudes from the inner peripheral surface of the skirt portion 3122. The vent slit 3131a is a notch for discharging the gas in the can container 3200 when opened. The vent slit 3131a is provided in a part of the knurled portion 3131, and includes an uneven portion recessed from the outer surface side to the inner surface side, and a notch for gas discharge provided at the upper end portion of the uneven portion.

The end of the vent slit 3131a on the notch side (the other end side of the skirt portion 3122) protrudes inward in the radial direction of the cap 3100 from the end on the other side. The plurality of vent slits 3131a form a locking portion in which the non-adhesive sealing member 3112 is locked to the cap body 3111 by the end portion on the notch side, and the sealing member 3112 is held in the cap body 3111.

The female screw portion 3132 is configured to be screwable with the male screw portion 3212 of the can container 3200. The female screw portion 3132 is formed together with the can container 3200. That is, the female screw portion 3132 is not molded in the finished product of the cap 3100 before being attached to the can container 3200, but is molded when integrally combined with the can container 3200.

The tamper evidence band portion 3133 engages with the jaw portion 3211 of the can container 3200 in the direction in which the cap 3100 is separated from the can container 3200 and in the axial direction of the cap 3100. Further, the tamper evidence band portion 3133 has a broken portion 3133a for breaking when the cap 3100 is opened and detaching from the skirt portion 3122. That is, the tamper evidence band portion 3133 is configured by forming a slit on the end side of the skirt portion 3122 leaving a broken portion 3133a, and is integrally combined with the can container 3200 like the female screw portion 3132. Occasionally, it engages with the jaw 3211 by being shaped into the shape of the jaw 3211 of the can container 3200.

The sealing member 3112 is configured separately from the cap body 3111 and is not adhered to the cap body 3111. The sealing member 3112 has a disk shape having an outer diameter larger than the diameter of the inscribed circle of the knurl portion 3131 provided on the skirt portion 3122 of the cap body 3111. The sealing member 3112 is integrally provided with the cap body 3111 by engaging with the vent slit 3131a of the knurl portion 3131 protruding in the radial direction from the inner peripheral surface of the skirt portion 3122 in the axial direction of the cap body 3111.

For example, as shown in FIGS. 25, 27 and 29, the sealing member 3112 includes a disk-shaped sliding layer 3141 and a disk-shaped sealing layer 3142 integrally laminated on the sliding layer 3141. I have. In the sealing member 3112, the sliding layer 3141 and the sealing layer 3142 are formed of different synthetic resins. In the sealing member 3112, the sealing layer 3142 is integrally laminated on the sliding layer 3141. For example, as shown in FIGS. 25 and 27, the sealing member 3112 includes a flat plate portion 3112a having a uniform thickness, a curved surface portion 3112b in which the outer surface of the outer peripheral edge on the top plate portion 3121 side is a curved surface, and a flat plate. It has a thick portion 3112c that is thicker than the flat plate portion 3112a provided between the portion 3112a and the curved surface portion 3112b. In other words, the sealing member 3112 has a disk shape, and the ridge portion on the top plate portion 3121 side is formed of a curved surface having a predetermined curvature. As shown in FIG. 25, the thick portion 3112c exists in a region that abuts on the outer peripheral side mouth portion 3210 of the sealing member 3112, for example. In the thick portion 3112c, the sealing layer 3142 is thicker than the flat plate portion 3112a on the central side of the sealing member 3112, and the sliding layer 3141 has the same thickness or thickness as the flat plate portion 3112a. thin.

The sliding layer 3141 is made of a resin material having a relatively higher hardness (harder) than the sealing layer 3142. Further, the sliding layer 3141 is made of a resin material having no adhesiveness and adhesiveness with the resin film layer of the cap body 3111. That is, the sliding layer 3141 is not adhered to the top plate portion 3121, and slides on the top plate portion 3121 in a state of being in contact with the top plate portion 3121.

Examples of the resin material used for the sliding layer 3141 include olefin resins such as polypropylene resin and polyethylene resin, polyester resins such as polyethylene terephthalate, styrene resins, and acrylic resins. In the present embodiment, the sliding layer 3141 is made of, for example, polypropylene resin. Pigments, lubricants, softeners, plasticizers and the like can be appropriately added to the resin material used for the sliding layer 3141. Further, in the example of the present embodiment, the hardness of the sliding layer 3141 is D10 to D70 in terms of the durometer D hardness according to JIS-K7215. More preferably, the hardness of the sliding layer 3141 is D40 to D65 in terms of the durometer D hardness according to JIS-K7215. The hardness of the sliding layer 3141 can be changed by changing the amount of additives such as plasticizers, copolymerizing the resin material, or blending other resin materials.

As shown in FIG. 27, the sliding layer 3141 is provided separately from the cap body 3111 so as to face the top plate portion 3121 of the cap body 3111. The sliding layer 3141 is configured to be slidable with the top plate portion 3121 of the cap body 3111 depending on the resin material used. The sliding layer 3141 is formed in a disk shape. The outer diameter of the sliding layer 3141 is smaller than the inner diameter of the skirt portion 3122, substantially the same diameter as the inscribed circle of the knurl portion 3131, or slightly larger than the inscribed circle, and the curl portion 3213 of the mouth portion 3210. It is configured to have a larger diameter than the outer diameter of.

As shown in FIGS. 25, 27 and 29, the sliding layer 3141 is composed of, for example, a first flat plate portion 3141a having a uniform thickness and an outer surface of an outer peripheral edge on the top plate portion 3121 side formed by a curved surface. A first curved surface portion 3141b, a protruding portion 3141c provided on the sealing layer 3142 side of the first curved surface portion 3141b, and a thin-walled portion 3141d provided between the first flat surface portion 3141a and the first curved surface portion 3141b are provided. ing. The thickness of the first flat plate portion 3141a is uniformly configured from the center of the sliding layer 3141 to the outer peripheral side of the portion of the mouth portion 3210 facing the curl portion 3213.

The first curved surface portion 3141b is configured such that the thickness of the portion from the outer peripheral side to the outer peripheral edge of the portion of the mouth portion 3210 facing the curl portion 3213 gradually decreases toward the outer peripheral edge. The protrusion 3141c is formed in an annular protrusion shape that is inclined with respect to the axial direction of the sliding layer 3141 and the surface direction of the top plate portion 3121 and is curved or inclined toward the opening end side of the skirt portion 3122. To. The thickness of the protruding portion 3141c gradually decreases from the first curved surface portion 3141b toward the tip end. The thin-walled portion 3141d is formed to be thinner than the first flat plate portion 3141a.

The sealing layer 3142 is made of a resin material having a relatively lower hardness (softer) than the sliding layer 3141. Examples of the resin material used for the sealing layer 3142 include olefin resin, polyester resin, styrene resin, acrylic resin and the like, and more preferably, a blend material of styrene elastomer and polypropylene resin, low density polyethylene and styrene resin. Examples thereof include elastomer blend materials and polyester-based elastomers. The resin material used for the sealing layer 3142 has adhesiveness with the resin material used for the sliding layer 3141. In the present embodiment, the sealing layer 3142 is composed of, for example, a blend material of a styrene-based elastomer and a polypropylene resin. Pigments, lubricants, softeners, plasticizers and the like can be appropriately added to the resin material used for the sealing layer 3142.

The sealing layer 3142 is integrally provided on the main surface of the sliding layer 3141 on the side facing the mouth portion 3210. The sealing layer 3142 is formed in a disk shape. The outer diameter of the sealing layer 3142 is smaller than the inner diameter of the skirt portion 3122, substantially the same diameter as the inscribed circle of the knurl portion 3131, or slightly larger than the inscribed circle, and the curl portion 3213 of the mouth portion 3210. It is configured to have a larger diameter than the outer diameter of. That is, the outer diameter of the sealing layer 3142 is the same as the outer diameter of the sliding layer 3141 or is configured to be larger than the outer diameter of the sliding layer 3141.

As shown in FIGS. 25, 27 and 29, the sealing layer 3142 has a second flat surface portion 3142a having a uniform thickness and a second curved surface in which the outer surface of the outer peripheral edge on the top plate portion 3121 side is a curved surface. Thickness provided between the portion 3142b, the annular recess 3142c provided on the main surface of the second curved surface portion 3142b opposite to the sliding layer 3141 side, and the second flat plate portion 3142a and the second curved surface portion 3142b. It has a meat part 3142d and. The main surface of the second flat plate portion 3142a facing the curl portion 3213 is formed as a flat surface. For example, the second flat plate portion 3142a is configured to have the same diameter as the first flat plate portion 3141a of the sliding layer 3141. The second flat plate portion 3142a, together with the first flat plate portion 3141a, constitutes the flat plate portion 3112a of the sealing member 3112. In this embodiment, the first flat plate portion 3141a and the second flat plate portion 3142a are set to have the same thickness.

The second curved surface portion 3142b has, for example, a main surface flush with the main surface facing the curl portion 3213 of the second flat plate portion 3142a. The second curved surface portion 3142b is configured such that the thickness of the portion of the mouth portion 3210 from the outer peripheral side to the outer peripheral edge of the portion facing the curl portion 3213 is gradually reduced toward the outer peripheral edge. The second curved surface portion 3142b is laminated on the first curved surface portion 3141b and the protrusion 3141c. The second curved surface portion 3142b, together with the first curved surface portion 3141b and the protrusion portion 3141c, constitutes the curved surface portion 3112b of the sealing member 3112.

The recess 3142c is in contact with the vent slit 3131a when the cap 3100 is arranged with the top plate portion 3121 facing upward and the sealing member 3112 falls below the top plate portion 3121. The recess 3142c is, for example, an annular recess having a semicircular cross section. The thick portion 3142d is formed to be thicker than the second flat plate portion 3142a and the thin wall portion 3141d. The thick portion 3142d, together with the thin portion 3141d, constitutes the thick portion 3112c of the sealing member 3112.

The sliding layer 3141 and the sealing layer 3142 are configured such that the first curved surface portion 3141b, the protruding portion 3141c and the second curved surface portion 3142b are thinner than the first flat surface portion 3141a and the second flat plate portion 3142a, respectively.

As shown in FIG. 30, such a sealing member 3112 has a deformed portion 3112d in which the sliding layer 3141 and the sealing layer 3142 are unevenly formed in a part thereof having the same shape as the uneven portion 3121a provided on the top plate portion 3121. Has. The deformed portion 3112d is plastically deformed, and the shape of the deformed portion 3112d is maintained even when it is not in contact with the uneven portion 3121a. Depending on the thickness of the sealing member 3112, the hardness of the material, and the like, the deformed portion 3112d may have a smaller degree of protrusion on the sealing layer 3142 side than the depth of the recess on the sliding layer 3141 side. Further, the deformed portion 3112d may only be recessed on the sliding layer 3141 side and may not protrude on the sealing layer 3142 side. That is, only the sliding layer 3141 may be deformed.

Further, the resin material used for the sealing member 3112, that is, the resin material used for the sliding layer 3141 and the sealing layer 3142, is, for example, the container 3001 in which the cap 3100 is covered with the can container 3200 and the contents are filled. In an environment where heat sterilization treatment such as retort treatment is performed, the deformed portion 3112d is formed on the sealing member 3112 by being heated by the internal pressure and temperature of the container 3001 and being brought into close contact with the uneven portion 3121a of the top plate portion 3121. A resin material that can be transferred) is used.

Similar to the uneven portion 3121a, the deformed portion 3112d is provided to give the sealing member 3112 information such as functionality such as Braille and product information display and design such as design. That is, the deformed portion 3112d improves the function of the sealing member 3112 by giving the sealing member 3112 various information and design properties.

The manufacturing method of the cap 3100 and the manufacturing method of the container 3001 configured in this way will be described with reference to FIGS. 31 and 32.

First, a method of manufacturing the cap 100 will be described with reference to FIG. 31. As the manufacturing apparatus used for manufacturing the cap 3100, the manufacturing apparatus 1 according to the first embodiment described above can be used. For example, a cylindrical skirt in which a sheet-shaped metal material is squeezed by a shell press device of a manufacturing apparatus, and the top plate portion 3121, the knurl portion 3131, the female screw portion 3132, and the tamper evidence band portion 3133 are not formed. A cup-shaped molded product composed of the portion 3122 and the corner portion 3123 is molded (step ST21). Next, the sliding layer molding device supplies the softened resin material onto the inner surface of the top plate portion 3121 of the molded product, and shapes the supplied resin material to mold the sliding layer 3141 (step ST22).

Next, the sealed layer 3142 is molded by supplying the softened resin material onto the sliding layer 3141 in the molded product by the sealing layer molding apparatus and shaping the supplied resin material (step ST23). As a result, the sealing member 3112 is molded in the molded product.

Next, the sealing member 3112 in the molded product is taken out by a transport device or the like that conveys the sealing member (step ST24). Next, the first molding is performed by molding the skirt portion 3122 of the molded product with the knurl portion 3131 and the tamper evidence band portion 3133 using a molded product processing device or the like (step ST25). Next, a second molding is performed in which the uneven portion 3121a is molded on the top plate portion 3121 by a molded product processing device or the like (step ST26). The first molding and the second molding may be performed at the same time, or the order may be reversed. The cap body 3111 is formed by these steps.

Next, the sealing member 3112 is inserted into the cap body 3111 by a transport device or the like (step ST27). At this time, the peripheral edge portion of the sealing member 3112 is inserted so as to get over the vent slit 3131a and come into contact with the top plate portion 3121. The sealing member 3112 inserted into the cap body 3111 may be a sealing member 3112 molded by another cap body 3111, or may be a sealing member 3112 molded inside itself.

The cap 3100 is manufactured by inserting the sealing member 3112 into the cap body 3111. Next, when the cap 3100 is collected in the collecting unit and a certain number of caps 3100 are collected in the collecting unit, the cap 3100 is transported to the inspection / packing process, which is the next process.

Next, a method for manufacturing the container 3001 will be described with reference to FIG. 32. First, the can container 3200 is filled with contents such as a beverage and liquid nitrogen (step ST31). Next, the can container 3200 is covered with the cap 3100 and the cap 3100 is placed on the can container 3200 so that the curl portion 3213, which is the tip of the mouth portion 3210 of the can container 3200, and the sealing layer 3142 of the sealing member 3112 come into contact with each other. (Step ST32).

Next, the cap 3100 is wound and fixed to the mouth 3210 of the can container 3200 (step ST33). In the winding tightening, a load is applied to the top plate portion 3121 of the cap body 3111, and the skirt portion 3122 is roll-on molded while the corner portion 3123 is drawn toward the can container 3200 to form the skirt portion 3122 of the cap 3100. This is done by molding the female screw portion 3132. As a result, the can container 3200 is sealed. At this time, the pressure inside the can container 3200 becomes positive.

Next, in order to sterilize the can container 3200, the container 3001 in which the cap 3100 is wound and fixed to the can container 3200 is retort-treated (step ST34). The conditions of the retort treatment vary depending on the contents. For example, the retort treatment is performed at a temperature of 110 ° C. to 130 ° C. and a time range of 10 minutes to 30 minutes. After the retort treatment, the container 3001 is cooled (step ST35) and dried (step ST36) to produce a container 3001 which is a positive pressure can filled with a beverage. During the retort treatment, the sealing member 3112 is heated and pressurized, and then cooled, so that the shape of the uneven portion 3121a is transferred and the deformed portion 3112d is formed. Further, cooling and drying may be performed in the same process. Further, as the sterilization treatment of the can container 3200, the contents are hot-filled at a high temperature of about 70 ° C. to 95 ° C. instead of the retort treatment, and the can container 3200 is sterilized by laying it sideways, or the can container 3200 is sterilized. It may be sterilized by sprinkling hot water at about 70 ° C. to 95 ° C. The deformed portion 3112d can also be formed by heating the cap 3100 by such a sterilization treatment.

The cap 3100 configured in this way has a structure in which the top plate portion 3121 is provided with the uneven portion 3121a and the sealing member 3112 is provided with the deformed portion 3112d, and the shape of the deformed portion 3112d is a shape corresponding to the uneven portion 3121a.

With such a configuration, the sealing member 3112 can improve the function in the same manner as the uneven portion 3121a of the top plate portion 3121. For example, when the uneven portion 3121a is provided with functions such as information such as Braille and product display and design such as design, the sealing member 3112 may also be provided with the same information and function by the deformed portion 3112d. it can.

For example, when the uneven portion 3121a and the deformed portion 3112d are marked so that the production lot or the like can be determined, the production lot can be determined not only for the cap body 3111 but also for the sealing member 3112. Further, for example, when the deformed portion 3112d is provided with a design property, the design property of the sealing member 3112 can be improved.

Further, since the sealing member 3112 is adhered to the cap body 3111 and is separate from the cap body 3111, various designs can be applied to, for example, motivate the purchaser to collect the sealing member 3112. It is also possible to motivate the purchase of a product in which the container 3001 is filled with a beverage. It is also possible to design the cap body 3111 and the sealing member 3112 according to the season, the event, and the like.

Further, by providing the concavo-convex portion 3121a on the cap body 3111 and further providing the deformed portion 3112d on the sealing member 3112, the cap 3100 can enhance the design of both the inside and the outside.

Further, for example, by setting the shapes of the uneven portion 3121a and the deformed portion 3112d to an annular shape or the like, it is possible to impart a function capable of aligning the sealing member 3112 with respect to the top plate portion 3121 in the radial direction. Therefore, when the container 3001 once opened is sealed again, the thick portion 3112c of the sealing member 3112 can be aligned with the mouth portion 3210.

Further, since the deforming portion 3112d is configured to deform the sealing member 3112, it is not necessary to increase the material used for the sealing member 3112, and the functionality of the sealing member 3112 is improved without increasing the manufacturing cost. Can be made to. As described above, the function of the sealing member 3112 can be improved by providing various information, functions, designs and the like by the deformed portion 3112d.

Further, the uneven portion 3121a is composed of recesses, a flat plate portion is arranged around the central axis of the cap main body 3111 in a part in the circumferential direction of the uneven portion 3121a, and when the cap main body 3111 is rotated at the time of opening the cap main body 3111, the uneven portion is formed. The 3121a and the deformed portion 3112d may be misaligned. With such a configuration, when the cap is opened, the uneven portion 3121a of the top plate portion 3121 presses a part of the sealing member 3112 excluding the deformed portion 3112d, so that the sealing member 3112 is pressed against the mouth portion 3210. Therefore, the sealing property of the sealing member 3112 can be improved.

As described above, according to the cap 3100 according to the embodiment of the present invention, the function of the sealing member 3112 can be improved by the deformed portion 3112d.

The present invention is not limited to the above-described embodiment. For example, in the above-mentioned example, some usage examples have been described as examples of improving the functions of the uneven portion 3121a of the cap body 3111 and the deformed portion 3112d of the sealing member 3112, but the present invention is not limited thereto. That is, the shape of the deformed portion 3112d of the sealing member 3112 can be appropriately set according to the shape of the uneven portion 3121a of the cap body 3111, and the usage method and the content of the function to be imparted can be appropriately set. That is, if the configuration of the above-described embodiment is provided, the shapes of the concave-convex portion 3121a and the deformed portion 3112d can be appropriately set, so that various uses are possible and a high degree of freedom is provided.

Further, in the above-described example, the structure in which the sealing member 3112 has two layers of the sliding layer 3141 and the sealing layer 3142 has been described, but the present invention is not limited to this, and the sealing member 3112 may be a single layer or may have three or more layers. It may have a structure. Further, the shape of the sealing member 3112 can be appropriately set. Further, an example in which the deformed portion 3112d of the sealing member 3112 is formed by a heat sterilization treatment such as a retort treatment has been described, but the present invention is not limited to this, and the deformed portion 3112d may be formed by the internal pressure of the container 3001 or as a hot beverage in stores. It may be formed by heating in. The configuration of the cap 3100 can be appropriately set as long as it has a configuration having a deformed portion 3112d having a shape corresponding to the uneven portion 3121a and the function can be improved.

The present invention is not limited to the above-mentioned first to fourth embodiments, and any of the embodiments can be applied to other embodiments. For example, the manufacturing apparatus 1 and manufacturing method of the cap 100 according to the first embodiment can be described by the cap 1100 according to the second embodiment, the cap 2100 according to the third embodiment, and the cap 3100 according to the fourth embodiment. It may be used for manufacturing.

Further, in each of the above-described embodiments, the functions and effects based on each configuration are described, but when the cap of any of the embodiments has the same configuration as the cap of the other embodiment, the same is applied. It is natural that the function and effect are exhibited. In each embodiment, for convenience of explanation, different reference numerals are given even in the same configuration.

That is, the present invention is not limited to the above embodiment, and can be variously modified at the implementation stage without departing from the gist thereof. In addition, each embodiment may be carried out in combination as appropriate, in which case the combined effect can be obtained. Further, the above-described embodiment includes various inventions, and various inventions can be extracted by a combination selected from a plurality of disclosed constituent requirements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, if the problem can be solved and the effect is obtained, the configuration in which the constituent requirements are deleted can be extracted as an invention.

1 ... Manufacturing equipment, 11 ... Conveying equipment, 11a ... 1st rail, 11b ... 2nd rail, 11c ... 3rd rail, 11c1 ... Rail, 11c2 ... Rail, 11d ... 4th rail, 11d1 ... Rail, 11d2 ... Rail, 12 ... Shell press device, 12a ... Storage unit, 12b ... Supply unit, 13 ... Sliding layer forming device, 13A ... First mold, 13B ... Conveying mechanism, 13C ... Material supply device, 14 ... Sealed layer forming device, 14A ... 2nd mold, 14B ... Transfer mechanism, 14C ... Material supply device, 15 ... Sealing member transfer device, 16 ... Molded product processing device, 16A ... 1st processing device, 16B ... 2nd processing device, 16C ... Transfer mechanism, 17 ... Collecting unit, 19 ... Control device, 41 ... Holding mechanism, 41a ... First rotating body, 41b ... Drive mechanism, 42 ... Supply mechanism, 42a ... Second rotating body, 42b ... Drive mechanism, 43 ... Sealing member transport mechanism , 51 ... 1st suction device, 52 ... 2nd suction device, 53 ... Conveyor device, 54 ... Vacuum pump device, 61 ... Lower mold, 61a ... First uneven part, 62 ... Upper mold, 62a ... Second unevenness Part, 63 ... Mold drive device, 100 ... Cap, 111 ... Cap body, 111A ... Molded product, 112 ... Sealing member, 112a ... Flat plate part, 112b ... Curved surface part, 121 ... Top plate part, 121a ... Concavo-convex part, 122 ... Skirt part, 123 ... Corner part, 131 ... Nar part, 131a ... Vent slit, 132 ... Female screw part, 133 ... Tamper evidence band part, 133a ... Breaking part, 141 ... Sliding layer, 141a ... First flat plate part, 141b ... 1st curved surface, 141c ... Projection, 142 ... Sealing layer, 142a ... 2nd flat plate, 142b ... 2nd curved surface, 200 ... Can container, 210 ... Mouth, 211 ... Jaw, 212 ... Male screw Part, 213 ... Curl part, 1001 ... Container, 1100 ... Cap, 1111 ... Cap body, 1112 ... Sealing member, 1112a ... Flat plate part, 1112b ... Curved part, 1112c ... Thick part, 1112d ... Deformed part, 1121 ... Top plate Part 1121a ... Concave part 1121b ... Flat plate part 1122 ... Skirt part 1123 ... Corner part 1131 ... Nar part 1131a ... Vent slit 1132 ... Female screw part, 1133 ... Tamper evidence band part, 1133a ... Broken part, 1141 ... Sliding layer, 1141a ... First flat plate portion, 1141b ... First curved surface portion, 1141c ... Protruding portion, 1141d ... Thin-walled portion, 1142 ... Sealing layer, 1142a ... Second flat plate portion, 1142b ... Second curved surface portion, 1142d ... Thick part, 1200 ... can container, 1210 ... mouth, 1211 ... jaw, 1212 ... male screw Part, 1213 ... Curl part, 2001 ... Container, 2100 ... Cap, 2111 ... Cap body, 2112 ... Sealing member, 2112a ... Flat plate part, 2112b ... Curved part, 2112c ... Thick part, 2112d ... Deformed part, 2121 ... Top plate Part, 2121a ... Concavo-convex part, 2122 ... Skirt part, 2123 ... Corner part, 2131 ... Nar part, 131a ... Vent slit, 2132 ... Female screw part, 2133 ... Tamper evidence band part, 2133a ... Breaking part, 2141 ... Sliding layer , 2141a ... 1st flat plate portion, 2141b ... 1st curved surface portion, 2141c ... Protruding portion, 2141d ... Thin wall portion, 2142 ... Sealing layer, 2142a ... 2nd flat plate portion, 2142b ... 2nd curved surface portion, 2142d ... Thick portion, 2200 ... Can container, 2210 ... Mouth, 2211 ... Jaw, 2212 ... Male screw, 2213 ... Curl, 3001 ... Container, 3100 ... Cap, 3111 ... Cap body, 3112 ... Sealing member, 3112a ... Flat plate, 3112b ... Curved surface part, 3112c ... Thick part, 3112d ... Deformed part, 3121 ... Top plate part, 3121a ... Concavo-convex part, 3121b ... Flat plate part, 3122 ... Skirt part, 3123 ... Corner part, 3131 ... Nar part, 3131a ... Vent slit , 3132 ... Female screw part, 3133 ... Tamper evidence band part, 3133a ... Broken part, 3141 ... Sliding layer, 3141a ... First flat plate part, 3141b ... First curved surface part, 3141c ... Projection part, 3141d ... Thin wall part, 3142 ... Sealing layer, 3142a ... Second flat plate portion, 3142b ... Second curved surface portion, 3142d ... Thick portion, 3200 ... Can container, 3210 ... Mouth portion, 3211 ... Jaw portion, 3212 ... Male screw portion, 3213 ... Curl portion.

Claims (14)

1. A cap body having a top plate portion at least partially protruding from the inner surface and a tubular skirt portion integrally provided on the peripheral edge portion of the top plate portion.
   A sealing member provided in the cap body separately from the cap body and facing the top plate portion.
   Cap with.
2. The top plate portion includes a flat plate portion formed in a flat plate shape and a recess provided in a part of the flat plate portion and projecting from an inner surface.
   The cap according to claim 1, wherein the cap body has a part of the flat plate portion in the circumferential direction of the recess around the central axis of the top plate portion.
3. The cap according to claim 2, wherein the sealing member is formed in a shape corresponding to the recess and has a deformed portion recessed from the main surface side facing the top plate portion.
4. The cap according to claim 3, wherein the recess has an asymmetric shape with respect to the center of the top plate portion or the center line passing through the center toward the main surface of the top plate portion.
5. The cap according to claim 2, wherein the height of the concave portion protruding from the inner surface of the top plate portion is set in the range of 0.05 mm to 2.0 mm.
6. The top plate portion is formed with uneven portions.
   The cap according to claim 1, wherein the sealing member has a durometer D hardness of at least a portion facing the top plate portion of D10 to D70.
7. The sealing member includes a sliding layer facing the top plate portion and a sealing layer laminated on the main surface of the sliding layer opposite to the main surface facing the top plate portion.
   The cap according to claim 6, wherein the sliding layer has a durometer D hardness of D10 to D70, and the durometer D hardness is higher than that of the sealing layer.
8. The cap according to claim 7, wherein the sliding layer has a durometer D hardness of D40 to D65.
9. The cap according to any one of claims 6 to 8, wherein the sealing member has a deformed portion formed in a shape corresponding to the uneven portion.
10. The top plate portion is formed with uneven portions.
    The cap according to claim 1, wherein the sealing member has a deformed portion having a shape corresponding to the uneven portion formed at a portion of the top plate portion facing the uneven portion.
11. 10. The sealing member comprises a sliding layer facing the top plate portion and a sealing layer laminated on the main surface of the sliding layer opposite to the main surface facing the top plate portion. The cap described.
12. According to claim 10 or 11, the sealing member is formed of a resin material to which a shape corresponding to the uneven portion is transferred in an environment when a can container covered with the cap is heat sterilized. Described cap.
13. The cap according to any one of claims 1 to 12 and
    A can container filled with the contents and sealed by the cap,
    A container equipped with.
14. The container according to claim 13, wherein the can container has a positive internal pressure.

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