WO2023047737A1

WO2023047737A1 - Metal cup

Info

Publication number: WO2023047737A1
Application number: PCT/JP2022/025302
Authority: WO
Inventors: 健村瀬; 章太田中; 信宏篠島; 江利華佐藤
Original assignee: 東洋製罐株式会社
Priority date: 2021-09-24
Filing date: 2022-06-24
Publication date: 2023-03-30
Also published as: JP2023046999A; TW202313411A

Abstract

The present invention addresses the problem of providing a metal cup in which sufficient internal volume is maintained and which has high pressure resistance such that deformation of a bottom part is avoided even when pressure is applied internally during production.　A metal cup (100) according to the present invention comprises a bottom section (120) and a trunk section (110) and has an upper surface side that is opened. The metal cup (100) is characterized in that: the bottom section has a dome-shaped central panel part (125) that protrudes toward the upper part of the cup or a flat central panel part and a ring-shaped grounding rim part (127) that protrudes toward the cup lower part further to the radially outer side than the central panel part; the grounding rim part has a grounding part (128) contacting a horizontal surface when placed on the horizontal surface, and a rising part (123) extending above the grounding part; and when the cup is placed on a horizontal surface, the angle of the rising part in relation to the horizontal surface is 15-89º.

Description

metal cup

The present invention relates to a metal cup that has a bottom and a body and is open on the top side.

In recent years, in order to conserve resources and reduce waste, there has been a demand for lightweight, inexpensive, and easily recyclable containers that can be substituted for containers made of paper, plastic, or the like.
BACKGROUND ART A metal cup with an open upper surface, which is used as tableware or as a container for filling beverages, foods, etc., is well known (see Patent Document 1, etc.), and its application is conceivable.

As a well-known cup-shaped container with an open top side, a metal cup that is used for tableware and is washed and reused many times is well known, but it is necessary to improve durability in consideration of long-term use. Therefore, a certain thickness is required to increase the strength, which increases the material cost and molding cost, and the weight is also heavy. .
In recent years, the recycling environment for metal can containers has also been established, so by using a metal cup made of a thin material such as that of Patent Document 1, it is possible to reduce the material cost and molding cost, reduce the weight, and use it as a tableware once. It is possible to save resources and reduce waste even by using only one.
However, there is a problem that the shape and structure are not suitable for storing and transporting empty metal cups that are open on the top side, and for users to use them with the cups open.
In addition, due to the increasing worldwide awareness of the need to prevent environmental pollution, such as the increasing marine pollution caused by plastics, there is a demand for cups made of materials that can be easily collected for recycling.

In the case where such a metal cup having an open top surface has a tapered body, in the manufacturing process, a bottom drawing process for forming the tapered shape of the body as shown in FIG. 6 is performed. In this bottom drawing process, air is introduced into the cup body 500 to be processed by an air mechanism 550 to apply a pressure of generally 0.05 to 0.4 MPa. A desired shape of the bottom portion 520 is formed in the cup body 500 to be processed in advance. There's a problem. 6, 540 is a diameter-reducing die that has a hole portion 541 having a smaller diameter than the outer diameter of the cylindrical portion of the cup body 500 to be processed, and that lowers in the direction of the black arrow in FIG. 6 to perform bottom drawing. 570 is a pedestal on which the cup body 500 to be processed is placed, and 580 is a support for pressing the cup body 500 to be processed from above.

On the other hand, the bottom of sealed cans used for beverage cans and the like, instead of cup-shaped containers, is formed in a dome shape or the like in order to increase pressure resistance and avoid deformation during processing as described above. However, in a container with a dome-shaped bottom, the bottom is convex toward the inside (upper side of the cup). There is a problem. For example, when pouring beer into a cup-shaped container, consumers attach importance to the amount of foam and are careful not to spill it when pouring, so be sure to secure a sufficient volume of the foam part in addition to the liquid part. is required, etc., a sufficient internal volume is required. It is conceivable to compensate for the volume reduction due to the dome part by increasing the height of the container, but in that case, the cost will increase due to the increase in the weight of the metal used, and the position of the center of gravity will become higher, resulting in low self-standing stability and falling over. There are concerns about various problems such as becoming easier.

Japanese Patent Application Laid-Open No. 2003-128060

The present invention is intended to solve the above-mentioned problems, and has a sufficient internal volume and high pressure resistance, so that even if pressure is applied inside during manufacturing, the deformation of the bottom To provide a metal cup that avoids the occurrence of

A metal cup according to the present invention is a metal cup having a bottom portion and a body portion, and having an opening on the upper surface side,
The bottom portion is a dome-shaped central panel portion that is convex upwardly of the cup, or a flat central panel portion and an annular portion that is radially outward of the central panel portion and is convex downwardly of the cup. a grounded rim, and
The ground rim portion has a ground portion that contacts the horizontal surface when placed on the horizontal surface, and a rising portion that extends upward from the ground portion,
The angle of the rising portion with respect to the horizontal surface when the cup is placed on the horizontal surface is 15 to 89°.

According to the metal cup (also simply referred to as "cup") of the present invention, since the angle of the rising portion with respect to the horizontal plane is 15 to 89°, high pressure resistance is reliably obtained and internal pressure is applied during manufacturing. The deformation of the bottom portion is suppressed even when the bottom portion is closed.
As the angle of the rising portion with respect to the horizontal plane increases (stands up), the pressure resistance increases. If the angle of the rising portion with respect to the horizontal plane is less than 15°, it may not be possible to obtain sufficient pressure resistance to avoid deformation of the bottom portion. On the other hand, if the angle of the rising portion with respect to the horizontal plane exceeds 89°, the molding load increases when molding the bottom portion.

According to the metal cup according to claim 2, the area in the bottom region surrounded by the virtual horizontal line including the highest vertex of the central panel portion, the placement line including the grounding portion, and the outer contour of the cup is A, When the area of the empty area surrounded by the outline between the grounding portions and the mounting line on the bottom is B, P represented by the relational expression (1): (B/A) × 100 (%) = P is By being in the range of 50 to 90%, since the bottom has a dome portion, pressure resistance is obtained, and even if internal pressure is applied during manufacturing, the deformation of the bottom is suppressed, and the upward convexity of the cup. The degree is small, and it is possible to prevent the internal space of the cup from being occupied by the dome portion, thereby ensuring a sufficient internal volume.

According to the metal cup according to claim 3, when the ground diameter, which is the inner diameter of the ground contact portion, is C, and the panel diameter of the central panel portion is D, the relational expression (2): (D / C) × 100 ( %) = Q When Q is in the range of 50 to 90%, pressure resistance is obtained even with a flat central panel portion, and even when internal pressure is applied during manufacturing Deformation of the bottom portion is suppressed, and since the central panel portion does not have a dome portion, the internal space of the cup is prevented from being occupied by the dome portion, and a sufficient internal volume can be secured.

According to the metal cup according to claim 4, the bottom portion continues radially inwardly of the ground contact rim portion between the center panel portion and the ground contact rim portion, and protrudes upward from the center panel portion. By having the annular concave portion, a higher pressure resistance can be obtained, and deformation of the bottom portion can be reliably suppressed even when internal pressure is applied during manufacturing.

According to the metal cup according to claim 5, when the body is 100% of the total height of the cup, the line connecting the outer peripheral surface of 10% height from the bottom and the outer peripheral surface of 90% height The outward spread angle (trunk taper angle) is 2° to 15°, preferably 3° to 10°. is suppressed, the shape of the cup is easy to stack and easy to hold for the user. Cups with a body taper angle of more than 15° have a large distance from adjacent cups when arranged in an upright position, resulting in poor storage efficiency. Cups with a body taper angle of less than 2° are stacked. When separating the cup, the difficulty of separation increases due to occurrence of jamming or the like.
In addition, when transporting and transferring cups such as filling equipment for beverages and foods and equipment for attaching lids, it is possible to transport and transfer cups in a stacked state, filling beverages and foods and sealing Efficiency can be improved, for example, in the case of manufacturing cans.

BRIEF DESCRIPTION OF THE DRAWINGS The side view which shows the cup which concerns on the 1st Embodiment of this invention. FIG. 4 is an end view showing the bottom shape of the cup according to the first embodiment of the present invention; The side view which shows the cup which concerns on the 2nd Embodiment of this invention. FIG. 11 is an end view showing the bottom shape of the cup according to the second embodiment of the present invention; FIG. 11 is an end view showing the shape of the bottom portion of a modified example of the cup according to the second embodiment of the present invention; The schematic diagram for demonstrating the manufacturing method of a cup.

[First embodiment]
The cup according to the first embodiment of the present invention has a bottom portion 120 and a body portion 110, as shown in FIG. A cup 100 having a shape substitutable for a cup.
A body portion 110 of the cup 100 includes a tapered portion 111 having an inverted truncated cone shape (tapered shape) that widens outward toward the upper side (upper opening 101 side), and an upper side portion 113 continuing from the tapered portion 111 to the upper opening 101. and a lower side portion 114 leading from the tapered portion 111 to the bottom portion 120 . The tapered portion 111 of the trunk portion 110 has, for example, a linear and uniform tapered shape in a cross-sectional view, and the angle θ thereof is 5°.
Also, the upper side portion 113 and the lower side portion 114 do not flare outward and have a substantially cylindrical shape.
The tapered portion 111 of the cup 100 has a height of 10% from the horizontal surface (mounting surface F) when the cup 100 is placed on a horizontal surface with the bottom portion 120 facing downward when the total height of the cup is 100%. to 90% of the height, it is formed with a uniform outward spread angle, so when the total height of the cup is 100%, the outer peripheral surface of 10% of the height from the bottom and the height of 90% of the height of the cup. The outward spread angle (trunk taper angle) of the line connecting the outer peripheral surfaces is about 5°, which is almost the same as θ.
In this embodiment, the peripheral edge of the upper opening 101, that is, the upper end of the barrel 110 is formed into a shape such as a curled shape in which the sharp edge face does not directly hit the mouth in order to be used as a cup.

As shown in FIG. 2, the bottom 120 of the cup 100 according to the first embodiment of the present invention has a dome-shaped center that bulges upward (on the side of the upper opening 101, upward in FIG. 2). It has a panel portion 125 and an annular grounding rim portion 127 with a substantially U-shaped cross section that protrudes radially outwardly of the central panel portion 125 downwardly of the cup (downward in FIG. 2). The grounding rim portion 127 has a shape that allows the cup 100 to maintain a stable upright state in a state of being grounded on a horizontal surface (mounting surface F).
The grounding rim portion 127 has a grounding portion 128 that contacts the mounting surface F when placed on the horizontal mounting surface F, and a rising portion 123 that extends upward and radially inward from the grounding portion 128 . The ground rim portion 127 is connected to the outer peripheral edge 126 of the central panel portion 125 via the raised portion 123 .
An outer peripheral end 126 of the central panel portion 125 is a peripheral edge where the diameter of the crown forming the central panel portion 125 is maximum.

The center panel portion 125 has a spherical crown shape with a single radius of curvature, and the radius of curvature R is 30 to 80 mm. Note that the central panel portion 125 is not limited to a spherical crown shape having a single radius of curvature, and may be a dome-shaped portion having a plurality of radiuses of curvature.
The smaller the curvature radius of the central panel portion 125 (the average of the curvature radius portions if it has a plurality of curvature radius portions), the larger the ratio of the area of the empty region in the bottom region described later, and the higher the pressure resistance of the cup 100. The internal volume of 100 becomes smaller. Also, as the radius of curvature of the central panel portion 125 increases, the area ratio of the empty area in the bottom area (to be described later) decreases.

The rising portion 123 is a portion from the contact portion 128 with the mounting surface F of the cup 100 to the outer peripheral edge 126 of the central panel portion 125, and the outer peripheral surface is composed of a flat surface, a curved surface, or a combination thereof. The inclination or radius of curvature of the rising portion 123 on the side of the central panel portion 125 is greatly different from the radius of curvature of the central panel portion 125 , and the direction of extension abruptly changes from the rising portion 123 to the central panel portion 125 at the connection point.
The angle (rising angle α) of the rising portion 123 with respect to the mounting surface F is 15 to 89°. The angle (rising angle α) of the rising portion 123 with respect to the mounting surface F is defined by the extension of the arc with the same radius of curvature on the center side of the grounding portion 128 and the outer peripheral end 126 in the longitudinal section passing through the axial center X of the cup 100 . It is defined as the angle with respect to the mounting surface F of a straight line connecting extension lines of circular arcs having the same radius of curvature that continue outward.
The larger the rising angle, the higher the pressure resistance of the cup 100 can be obtained.

The cup 100 is surrounded by an imaginary horizontal line V including the highest vertex of the central panel portion 125, a grounding line L including the grounding portion 128, and the outermost contour of the cup 100 in a longitudinal section passing through the axial center X. A is the area of the bottom area where the bottom area is formed (dotted area indicated by A in FIG. 2), and an empty area (indicated by B in FIG. When the area of the shaded area) is B, P represented by the relational expression (1): (B/A)×100(%)=P is set to be in the range of 50 to 90%. The bottom area and the empty area in the longitudinal section passing through the axial center X are the areas when the longitudinal sections cut along an arbitrary vertical plane are maximized.
If the ratio of the area of the empty area to the bottom area is excessively large, the extent of the upward protrusion of the cup is large, and the internal space of the cup 100 is occupied by the dome portion, ensuring a sufficient internal volume of the cup 100. I can't. On the other hand, if the ratio of the area of the empty region to the bottom region is too small, the cup 100 cannot obtain sufficient pressure resistance, and the bottom 120 may deform when internal pressure is applied during manufacturing.

The distance (bottom sink: BS) from the ground portion 128, which is the lowest end of the ground rim portion 127, to the topmost portion of the central panel portion 125 is 1 to 20 mm.
If the bottom sink (BS) is too small, the pressure resistance of the cup 100 cannot be obtained, and deformation may occur when the internal pressure increases. may protrude and impair the self-sustainability of the entire grounding rim portion 127 of the cup 100 . On the other hand, if the bottom sink (BS) is too large, there is a risk that the internal volume of the cup will decrease and the amount of metal material for forming the cup will increase.

As a plate material for forming the cup 100, an aluminum alloy plate having a thickness of 0.20 mm to 0.35 mm laminated with a PET film having a thickness of about 0.01 mm on both sides is used, like a well-known aluminum alloy two-piece beverage can. A plate material is used.
By using such a plate material, when it is molded into a cup, the plate thickness of the material is almost maintained. The plate thickness is 0.20 mm to 0.35 mm. The thickness of the body portion 110 in the range of height is 0.10 to 0.22 mm.
In the cup 100 having the plate thickness as described above, the bottom shape of the present invention in which P represented by the above relational expression (1) is in the range of 50 to 90%, so that the same plate thickness A higher pressure resistance can be obtained than a cup having a shape in which P expressed by the above relational expression (1) deviates from the range of 50 to 90%.

When stacking the cups 100 according to the present invention,
(1) Near the upper end of the outer surface of the tapered portion 111 of the upper cup 100 and the inner upper end of the upper side portion 113 of the lower cup 100 (2) The lower end of the outer surface of the lower side portion 114 of the upper cup 100 and the lower cup 100 At least one near the lower end of the inner surface of the tapered portion 111 of the upper cup 100 contacts and overlaps, and the outer surface of the tapered portion 111 of the upper cup 100 and the inner surface of the tapered portion 111 of the lower cup 100 are not in close contact with each other.

A protrusion protrudes from the upper end of the lower cup 100 on the upper end side of the upper cup 100, and the protrusion height of the protrusion depends on the height of the upper side portion 113, the height of the lower side portion 114, the shape of the bottom portion 120, and the like. Determined.
The height of the protrusion is, for example, 8.0 mm, and the stack ratio, which is the ratio of the height of the protrusion to the height H of the cup 100, is 7.1%.
Note that the upper side portion 113 and the lower side portion 114 may be formed so as to expand outward at an angle different from that of the tapered portion 111, or only one of them may be provided, or both of them may be omitted.
Further, upper side portion 113 and lower side portion 114 may be formed to narrow inwardly.

If the upper side 113 and the lower side 114 do not exist, or if they are very small and have a shape that allows close contact between the outer surface of the bottom 120 of the upper cup 100 and the inner surface of the bottom 120 of the lower cup 100 when stacked, By providing a bead which is an independent contact portion that protrudes to the inner surface side of the barrel portion 110 and contacts the outer surface of the cups stacked above, the outer surface of the barrel portion 110 of the upper cup 100 and the barrel portion of the lower cup 100 are separated. It may be prevented that the inner surface of 110 is in close surface contact.
The shape, direction, number and location of the beads may be arbitrary, and the beads may protrude inwardly or outwardly, or the inner and outer surfaces may be mixed.
Moreover, as long as it functions as a contact portion, it may be a protruding portion that protrudes from the tapered portion 111 in a point or a plane instead of a bead shape.

Also, after filling the cup 100 with a beverage or the like, the cup 100 may be used as a can with a lid attached.
The lid member may be any type such as a stay-on tab lid made of metal, a laminated sheet, a screw lid, or the like.
When the lid member is used as a stay-on tab lid and is seamed to the upper end of the barrel, the upper end of the barrel of the cup may be trimmed for seaming and then flanged to form a planar portion. .
When the cover member is adhered to the upper end of the barrel by heat or the like as a laminated sheet, the upper end of the barrel of the cup may have a shape having a planar portion in order to secure the adhesion area. Sheets made of laminates include, for example, aluminum foil, paper, resin films, and laminated materials obtained by laminating two or more of these, and a heat adhesive layer (heat seal layer) may be further laminated. As the heat-adhesive layer, a layer made of an adhesive such as a known sealant film, a lacquer-type adhesive, an easy-peel adhesive, or a hot-melt adhesive can be used.
When the lid member is screw-fixed to the upper end of the barrel, a protrusion such as the upper side portion 113 of the upper end of the barrel of the cup may have threads. A spout-equipped lid member having a separate thread may be wound around the upper end of the body of the cup.
By matching the projecting portion to the attachment form of the lid member, the efficiency of storing and transporting the cup portion can be improved regardless of the type of lid member.

As described above, the cup according to the first embodiment of the present invention has been described in detail, but the first embodiment of the present invention is not limited to the above-described embodiment. Various modifications may be made within the scope of the subject matter.
For example, the cup of the present invention is not limited to a cup in which the tapered portion of the body is formed in a shape that spreads outward at an angle of 2 ° to 15 ° at any point, and locally Similar to the upper side and lower side of this embodiment, the cup has a part outside the range of 2 ° to 15 °, and the outward spread of the body is gradually It is also possible to manufacture cups having barrels with a combination of straight flares, curved flares, shoulders, etc., such as cups with varying curves and cups with multiple steps in the barrel.

[Second embodiment]
The cup according to the second embodiment of the present invention has a bottom portion 220 and a body portion 210, as shown in FIG. A cup 200 having a shape substitutable for a cup.
A body portion 210 of the cup 200 includes a tapered portion 211 having an inverted truncated cone shape (tapered shape) that widens outward toward the upper side (upper opening 201 side), and an upper side portion 213 continuing from the tapered portion 211 to the upper opening 201. and a lower side portion 214 leading from the tapered portion 211 to the bottom portion 220 . The tapered portion 211 of the trunk portion 210 has, for example, a linear and uniform tapered shape in a cross-sectional view, and the angle θ thereof is 5°.
Also, the upper side portion 213 and the lower side portion 214 do not flare outward and have a substantially cylindrical shape.
The tapered portion 211 of the cup 200 has a height of 10% from the horizontal surface (mounting surface F) when the cup 200 is placed on a horizontal surface with the bottom portion 220 facing downward when the total height of the cup is 100%. to 90% of the height, it is formed with a uniform outward spread angle, so when the total height of the cup is 100%, the outer peripheral surface of 10% of the height from the bottom and the height of 90% of the height of the cup. The outward spread angle (trunk taper angle) of the line connecting the outer peripheral surfaces is about 5°, which is almost the same as θ.
In this embodiment, the peripheral edge of the upper opening 201, that is, the upper end of the barrel 210 is formed into a shape such as a curled shape in which the sharp edge face does not directly hit the mouth in order to be used as a cup.

The bottom portion 220 of the cup 200 according to the second embodiment of the present invention comprises a flat circular central panel portion 225 and a cup lower (mounting) portion radially outward of the central panel portion 225, as shown in FIG. It has an annular grounding rim portion 227 with a substantially U-shaped cross section that bulges downward in FIG. 4 . The grounding rim portion 227 has a shape that allows the cup 200 to maintain a stable upright state when the cup 200 is grounded on the mounting surface F.
The grounding rim portion 227 has a grounding portion 228 that contacts the mounting surface F when placed on the mounting surface F, which is a horizontal surface, and a rising portion 223 that extends upward and radially inward from the grounding portion 228 . The ground rim portion 227 is connected to the outer peripheral edge 226 of the central panel portion 225 via the raised portion 223 .
An outer peripheral edge 226 of the central panel portion 225 is the edge of a plane forming the central panel portion 225 .

The rising portion 223 is a portion from a contacting portion 228 with the mounting surface F of the cup 200 to an outer peripheral end 226 of the central panel portion 225, and the outer peripheral surface is composed of a flat surface, a curved surface, or a combination thereof. Since the inclination or radius of curvature of the rising portion 223 on the central panel portion 225 side differs greatly from the horizontal plane, the extending direction of the rising portion 223 to the central panel portion 225 suddenly changes at the connection point.
The angle (rising angle α) of the rising portion 223 with respect to the mounting surface F is set to 15 to 89°, and is 30° in this embodiment. The angle (rising angle α) of the rising portion 223 with respect to the mounting surface F is defined by the extension of the arc with the same radius of curvature on the center side of the grounding portion 228 and the outer peripheral end 226 in the longitudinal section passing through the axial center X of the cup 200 . It is defined as the angle with respect to the mounting surface F of a straight line connecting extension lines of circular arcs having the same radius of curvature that continue outward.

In the cup 200, when C is the contact diameter (contact diameter of the contact rim portion 227), which is the inner diameter of the contact portion 228, and D is the panel diameter of the central panel portion 225, relational expression (2): (D/C)× Q represented by 100(%)=Q ranges from 50% to 90%, and is 80% in this embodiment.
The grounding diameter of the grounding rim portion 227 refers to the diameter of the circle of the portion that is grounded when the cup 200 is placed on a horizontal surface. Further, the panel diameter of the central panel portion 225 means the distance between the outer peripheral ends 226 in the cross section including the axial center X of the central panel portion 225 .
If the ratio of the panel diameter to the ground diameter is excessively large, there is a possibility that the forming load such as metal cracks at the bottom portion 220 will increase. On the other hand, if the ratio of the panel diameter to the ground diameter is too small, the cup 200 may not have sufficient pressure resistance, and the bottom 220 may deform when internal pressure is applied during manufacture.

The distance (bottom sink: BS) from the ground portion 228, which is the lowest end of the ground rim portion 227, to the central panel portion 225 is 1.5 to 5.0 mm, and is 2.5 mm in this embodiment.
If the bottom sink (BS) is too small, the pressure resistance of the cup 200 cannot be obtained, and deformation may occur when the internal pressure rises. may protrude and impair the self-sustainability of the entire grounding rim portion 227 of the cup 200 . On the other hand, if the bottom sink (BS) is too large, there is a risk that the internal volume of the cup will decrease and the amount of metal material for forming the cup will increase.

As a plate material for forming the cup 200, an aluminum alloy plate having a thickness of 0.20 mm to 0.35 mm laminated with a PET film having a thickness of about 0.01 mm on both sides is used, like a well-known aluminum alloy two-piece beverage can. A plate material is used.
By using such a plate material, when it is molded into a cup, the plate thickness of the material is almost maintained. The plate thickness is 0.20 mm to 0.35 mm. The thickness of the trunk portion 210 in the range of height is 0.10 to 0.22 mm.
In the cup 200 having the plate thickness as described above, the bottom shape of the present invention in which Q represented by the above relational expression (2) is in the range of 50 to 90%. A higher pressure resistance can be obtained than a container having a shape in which Q expressed by the relational expression (2) deviates from the range of 50 to 90%.

When stacking the cups 200 according to the present invention,
(1) Near the upper end of the outer surface of the tapered portion 211 of the upper cup 200 and the inner upper end of the upper side portion 213 of the lower cup 200 (2) The lower end of the outer surface of the lower side portion 214 of the upper cup 200 and the lower cup 200 At least one near the lower end of the inner surface of the tapered portion 211 of the upper cup 200 contacts and overlaps, and the outer surface of the tapered portion 211 of the upper cup 200 and the inner surface of the tapered portion 211 of the lower cup 200 are not in close contact with each other.

A protrusion protrudes from the upper end of the lower cup 200 on the upper end side of the upper cup 200, and the protrusion height of the protrusion depends on the height of the upper side portion 213, the height of the lower side portion 214, the shape of the bottom portion 220, and the like. Determined.
The height of the protrusion is, for example, 8.0 mm, and the stack ratio, which is the ratio of the height of the protrusion to the height H of the cup 200, is 7.1%.
Note that the upper side portion 213 and the lower side portion 214 may be formed so as to spread outward at an angle different from that of the tapered portion 211, or only one of them may be provided, or both of them may be omitted.
Further, the upper side portion 213 and the lower side portion 214 may be formed to narrow inwardly.

If the upper side portion 213 and the lower side portion 214 do not exist, or if they are very small and have a shape that allows close contact between the outer surface of the bottom portion 220 of the upper cup 200 and the inner surface of the bottom portion 220 of the lower cup 200 when stacked, By providing a bead, which is an independent contact portion that protrudes on the inner surface side of the barrel portion 210 and contacts the outer surface of the cups stacked above, the outer surface of the upper cup 200 and the lower cup 200 are separated from each other. It may also prevent intimate surface contact with the inner surface of 210 .
The shape, direction, number and location of the beads may be arbitrary, and the beads may protrude inwardly or outwardly, or the inner and outer surfaces may be mixed.
Moreover, as long as it functions as a contact portion, it may be a protruding portion that protrudes from the tapered portion 211 in a point or a plane instead of a bead shape.

Also, after filling the cup 200 with a beverage or the like, the cup 200 may be used as a can with a lid attached.
The lid member may be any type such as a stay-on tab lid made of metal, a laminated sheet, a screw lid, or the like.
When the lid member is used as a stay-on tab lid and is seamed to the upper end of the barrel, the upper end of the barrel of the cup may be trimmed for seaming and then flanged to form a planar portion. .
When the cover member is adhered to the upper end of the barrel by heat or the like as a laminated sheet, the upper end of the barrel of the cup may have a shape having a planar portion in order to secure the adhesion area. Sheets made of laminates include, for example, aluminum foil, paper, resin films, and laminated materials obtained by laminating two or more of these, and a heat adhesive layer (heat seal layer) may be further laminated. As the heat-adhesive layer, a layer made of an adhesive such as a known sealant film, a lacquer-type adhesive, an easy-peel adhesive, or a hot-melt adhesive can be used.
When the lid member is screw-fixed to the upper end of the barrel, the upper end of the barrel of the cup may have a thread on the upper side portion 213 or the like. A spout-equipped lid member having a separate thread may be wound around the upper end of the body of the cup.
By matching the projecting portion to the attachment form of the lid member, the efficiency of storing and transporting the cup portion can be improved regardless of the type of lid member.

As described above, the cup according to the second embodiment of the present invention has been described in detail, but the second embodiment of the present invention is not limited to the above-described embodiment. Various modifications may be made within the scope of the subject matter.
For example, the cup of the present invention is not limited to a cup in which the tapered portion of the body is formed in a shape that spreads outward at an angle of 2 ° to 15 ° at any point, and locally Similar to the upper side and lower side of this embodiment, the cup has a part outside the range of 2 ° to 15 °, and the outward spread of the body is gradually It is also possible to manufacture cups having barrels with a combination of straight flares, curved flares, shoulders, etc., such as cups with varying curves and cups with multiple steps in the barrel.

Further, for example, as shown in FIG. 5, the bottom of the cup includes a flat circular central panel portion 325 and a radially outer side of the cup below the central panel portion 325 (on the mounting surface F side, below in FIG. 5). ), an annular grounding rim portion 327 having a substantially U-shaped cross section that bulges out to be convex, and a central panel portion 325 and a grounding rim portion 327 that are continuous to the inside of the grounding rim portion 327 between the center panel portion 325 and the grounding rim portion 327. The bottom portion 320 has an annular concave portion 329 that is continuous with the outside of the portion 325 and has a substantially inverted U-shaped cross section that protrudes upward (upward in FIG. 5) from the central panel portion 325. good too.
Even in the cup 300 having the bottom portion 320 of such a shape, the Q represented by the above relational expression (2) is in the range of 50 to 90%, so that even if the central panel portion 325 is flat, the pressure resistance can be reduced. deformation of the bottom is suppressed even when internal pressure is applied during manufacture, and the inner space of the cup 300 is occupied by the dome portion because the central panel portion 325 does not have a dome portion. It is possible to prevent this and secure a sufficient internal volume.
In such an embodiment, the annular recess 329 and the central panel portion 325 are continuous through an arcuate corner portion 322 that is convex downwardly of the cup, and the flat surfaces of the corner portion 322 and the central panel portion 325 The starting point of the arc of the corner portion 322 , which is the connection position with the center panel portion 325 , is the outer peripheral edge 326 of the central panel portion 325 . The grounding diameter of the grounding rim portion 327 refers to the diameter of the circle of the portion that touches the ground when the cup 300 is placed on a horizontal surface, and the panel diameter of the central panel portion 325 refers to the axis of the central panel portion 325. The center-to-center distance of the radius of curvature of the corner portions 322 at both ends in a cross section containing the center X.
The curvature radius R of the corner portion 322 is set to 1.5 to 3.5 mm.
Further, the distance (bottom countersink: BCS) from the bottommost portion (grounding surface) of the grounding rim portion 327 to the topmost portion of the annular concave portion 329 is set to 4.0 to 7.0.

100, 200, 300...

Cups

101, 201...

Upper openings

110, 210...

Body parts

111, 211...

Tapered parts

113, 213...

Upper side parts

114, 214...

Lower side Parts

120, 220, 320... Bottom part 322...

Corner parts

123, 223... Rising

parts

125, 225, 325...

Central panel parts

126, 226, 326... Outer peripheral edge 127 of the central panel part , 227, 327... Grounding

rim portions

128, 228... Grounding portion 329... Annular concave portion 500... Cup body to be processed 520... Bottom portion 540... Diameter reduction die 541... Hole portion 550: air mechanism 570: base 580: support θ: angle of tapered portion F: mounting surface H: height of cup L: mounting line V:・ Horizontal line X ・・・ Center of axis

Claims

A metal cup having a bottom and a body and having an open top,
The bottom portion is a dome-shaped central panel portion that is convex upwardly of the cup, or a flat central panel portion and an annular portion that is radially outward of the central panel portion and is convex downwardly of the cup. a grounded rim, and
The ground rim portion has a ground portion that contacts the horizontal surface when placed on the horizontal surface, and a rising portion that extends upward from the ground portion,
A metal cup, wherein the angle of the rising portion with respect to the horizontal surface is 15 to 89° when the cup is placed on the horizontal surface.
The central panel portion of the bottom portion is a dome-shaped central panel portion that protrudes upward from the cup, and an imaginary horizontal line that includes the highest vertex of the central panel portion in a longitudinal section passing through the axial center of the cup. A is the area in the bottom region surrounded by the grounding line including the grounding portion and the outer contour of the cup; The metal cup according to claim 1, wherein P represented by the following relational expression (1) is in the range of 50 to 90% when the area of the region is B.
Relational expression (1): (B / A) × 100 (%) = P
When the center panel portion of the bottom portion is a flat center panel portion, and the ground contact diameter, which is the inner diameter of the ground contact portion, is C, and the panel diameter of the center panel portion is D, it is expressed by the following relational expression (2). 2. The metal cup of claim 1, wherein the Q is in the range of 50-90%.
Relational expression (2): (D / C) × 100 (%) = Q
The bottom portion has, between the central panel portion and the ground rim portion, an annular recess that continues radially inwardly of the ground rim portion and protrudes above the cup relative to the center panel portion. 4. The metal cup of claim 3, characterized by:
In the body part, the line connecting the outer peripheral surface at 10% height and the outer peripheral surface at 90% height from the bottom when the total height of the cup is 100% is outward at an angle of 2 ° to 15 ° 5. A metal cup according to any one of claims 1 to 4, characterized in that it has a widening shape.