Container

Abstract

Provided is a metal container that is easy to recycle, reduces material costs and molding costs, reduces weight, and is most suitable for storage and transportation in an empty state and use in an open state. A metal container (100) with an open upper surface side, the trunk portion (110) is formed into the following shape: when the entire height of the container is set to 100%, the line connecting the outer peripheral surface at 10% of the height from the lowermost part and the outer peripheral surface at 90% of the height extends outward at an angle of 2° to 15°. When two containers (100) are overlapped, the protruding portion (112) of the upper container (100) is at a height of 20 mm or less from the upper end of the lower container (110u).

Description

Technical Field

[0001] The present invention relates to a metal container having a bottom and a trunk portion and an opening on the upper surface side. Background Art

[0002] In recent years, in order to save resources and reduce waste, etc., there has been a demand for a container that is lightweight, inexpensive, and easy to recycle and can replace containers such as paper and plastic.

[0003] It is well known that a metal container having an opening on the upper surface side, which is used as tableware or as a container for filling beverages, foods, etc. (see Patent Document 1, etc.), and it is possible to consider applying this.

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2003-128060 Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] As a well-known container having an opening on the upper surface side, it is well known that a metal container that is used as tableware and is washed and reused many times. However, considering long-term use, it is necessary to improve durability, so a certain thickness of the plate is required to improve strength. As a result, the material cost and molding cost increase, and the weight also increases. Therefore, there are many problems for replacing containers such as paper and plastic.

[0009] In recent years, since the recycling environment for metal can containers has also been improved, by using a metal container made of a thin material like Patent Document 1, the material cost and molding cost can be reduced, the weight can be reduced, and resources can be saved and waste can be reduced even if it is used only once as tableware.

[0010] However, there is a problem that the shape and structure are not suitable for storing and transporting the metal container having an opening on the upper surface side itself in an empty state and for the user to use it in an open state.

[0011] In addition, due to the worldwide increase in awareness of environmental pollution prevention such as the deterioration of marine pollution caused by plastics, there is a demand for a container made of a material that is suitable for recycling and easy to recycle.

[0012] The present invention has been completed to solve the above-described problems, and an object thereof is to provide a metal container that is easy to recycle, reduces the material cost and molding cost, reduces the weight, and is most suitable for storing, transporting, and using in an open state in an empty state.

[0013] Technical Solution

[0014] The container of the present invention is a metal container having a bottom and a trunk portion and an opening on the upper surface side. The trunk portion is formed into the following shape: when the entire height of the container is set to 100%, the line connecting the outer peripheral surface at 10% of the height from the lowermost part and the outer peripheral surface at 90% of the height extends outward at an angle of 2° to 15°. When two such containers are overlapped, the protruding portion protruding from the lower container has a height of 20 mm or less from the upper end of the lower container, thereby solving the above problems.

[0015] Advantages of the Invention

[0016] The container according to the first aspect of the present invention is a metal container that is easy to recycle. Its trunk portion is formed into the following shape: when the entire height of the container is set to 100%, the line connecting the outer peripheral surface at 10% of the height from the lowermost part and the outer peripheral surface at 90% of the height extends outward at an angle of 2° to 15°, thereby improving the strength, suppressing tipping when the center of gravity rises due to containing beverages, etc., and becoming a shape that is easy to stack and easy for users to hold.

[0017] In addition, when two containers are overlapped, the protruding portion of the upper container protruding from the lower container has a height of 20 mm or less from the upper end of the lower container, thereby reducing the height when multiple containers are overlapped.

[0018] If, when the entire height of the container is set to 100%, the angle of the line connecting the outer peripheral surface at 10% of the height from the lowermost part and the outer peripheral surface at 90% of the height exceeds 15°, the distance from the adjacent container becomes larger when arranged in an upright state, so the storage efficiency deteriorates, and it is more preferably 10° or less.

[0019] If, when the entire height of the container is set to 100%, the angle of the line connecting the outer peripheral surface at 10% of the height from the lowermost part and the outer peripheral surface at 90% of the height is less than 2°, the difficulty of separating the overlapped containers becomes higher due to the occurrence of embedding, etc., and it is more preferably 3° or more.

[0020] According to the structure described in the second aspect of the present invention, the plate thickness of the bottom is 0.20 mm or more, the center of gravity position is low, and the self-standing stability is good.

[0021] In addition, the plate thickness at the bottom is 0.35 mm or less. When the entire height of the container is set to 100%, within the range of 50 ± 10% of the height, the plate thickness of the trunk portion is 0.10 - 0.22 mm. Thereby, the material cost and the molding cost can be reduced, lightweight can be achieved, and it is formed into the following shape: when the entire height of the container is set to 100%, the line connecting the outer peripheral surface at 10% of the height from the lowermost part and the outer peripheral surface at 90% of the height extends outward at an angle of 3° - 10° upward, thereby becoming a more preferable shape.

[0022] According to the structure described in Solution 3, the stacking rate, which is the ratio of the protruding portion to the height of the container, is 4% - 15%. Thereby, the ease of separation such as preventing embedding can be ensured when overlapping multiple containers, the volume can be reduced, and the efficiency during storage and transportation in an empty state can be improved.

[0023] The structure described in Solution 4 is more preferable.

[0024] According to the structure described in Solution 5, it is possible to reliably prevent the trunk portions from closely contacting each other in a surface - to - surface manner when overlapping multiple containers. When separating each of the multiple overlapping containers, the air circulation between the containers can be made good, and the ease of separation can be further improved.

[0025] According to the structure described in Solution 6, it has a dome - shaped central top portion protruding upward from the can, thereby ensuring the strength of the bottom, and through the annular grounding edge portion protruding downward from the can, it can be stably grounded.

[0026] According to the structure described in Solution 7, the height of the central top portion from the ground contact surface of the grounding edge portion is 12% or less of the panel diameter of the central top portion. Thereby, the capacity when putting in the contents can be ensured, the center of gravity can be kept low, and it can be grounded more stably.

[0027] According to the structure described in Solution 8, the radius of curvature of the central top portion is formed within the range of 1.0 times or more and 6.0 times or less of the panel diameter of the central top portion. Thereby, the capacity when putting in the contents can be ensured, the center of gravity can be kept low, and it can be grounded more stably.

[0028] For the cans according to Solutions 9 to 12, when transporting and transferring containers such as in filling equipment for beverages, foods, etc., and lid - mounting equipment, the containers can be transported and transferred in a stacked state, and the efficiency in cases such as manufacturing cans by filling and sealing beverages, foods, etc. can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a side view of a container according to an embodiment of the present invention.

[0030] Figure 2It is a side view of the containers of one embodiment of the present invention being overlapped.

[0031] Figure 3 is Figure 2 a partially enlarged view.

[0032] Figure 4 It is an explanatory view of the bottom of the container of one embodiment of the present invention.

[0033] Figure 5 It is a reference view of the containers of other embodiments of the present invention.

[0034] Figure 6 It is a reference view of the containers of another other embodiment of the present invention. Detailed Embodiment

[0035] As Figure 1 shown, as the container 100 of one embodiment of the present invention, it has a bottom 120 and a trunk 110, is made of metal, and has an upper opening 101 with an opening on the upper surface side, and is in a shape that can replace well-known paper cups and plastic cups.

[0036] The trunk 110 has: an intermediate side portion 111 that expands outward in the upward direction; an upper side portion 113 near the upper opening 101; and a lower side portion 114 connected to the bottom 120.

[0037] In this embodiment, the intermediate side portion 111 is a straight and uniform cone in a sectional view including the container center line, and the angle θ is 5°.

[0038] In addition, the upper side portion 113 and the lower side portion 114 do not expand outward.

[0039] As Figure 1 shown, when the entire height of the container is set to 100%, the intermediate side portion 111 is formed from a height of about 10% from the lowest part to a height of 90% at a uniform outward expansion angle. Therefore, when the entire height of the container is set to 100%, the angle at which the line connecting the outer peripheral surface at a height of 10% from the lowest part and the outer peripheral surface at a height of 90% expands outward is almost the same as θ, about 5°.

[0040] It should be noted that, as the container 100B shown Figure 6 shown, the outward expansion of the trunk 110B can also be a curved shape with a gradually changing angle in a sectional view including the container center line, or like the container 100C, multiple stepped portions can be formed in the trunk 110C, or a combination of linear expansion, curved expansion, stepped portions, etc. can be made.

[0041] At this time, if it is formed into the following shape: when the entire height of the container is set to 100%, the angle at which the line connecting the outer peripheral surfaces of the 10% height from the lowermost part and the 90% height of the trunk part 110 extends outward is from 2° to 15°, it is also possible that, locally, similar to the upper side part 113 and the lower side part 114 of the present embodiment, there are parts outside the range of 2° to 15°.

[0042] As Figure 4 shown, the bottom 120 has a dome-shaped central dome part 121 protruding upward from the can; and an annular grounding edge part 122 protruding downward from the can on the radially outer side of the central dome part 121. The bottom 120 is formed such that when the container 100 is placed, the lowermost point of the grounding edge part 122 protruding downward is in line contact or surface contact with the ground.

[0043] In addition, regarding the shape of the central dome part 121, if the height (bottom sink) of the uppermost part of the central dome part 121 from the grounding surface of the grounding edge part 122 is set to dH; the panel diameter of the central dome part 121 (the shortest distance between the two outer peripheral ends of the central dome part 121 in the cross-section including the container center line) is set to dW; the radius of curvature of the central dome part 121 in the cross-section including the container center line is set to dR, then it is formed into

[0044] dH / dW ≤ 12%

[0045] 1.0 ≤ dR / dW ≤ 6.0,

[0046] seeking to improve the strength of the bottom, stabilize the center of gravity, and ensure the capacity.

[0047] It should be noted that as long as the radius of curvature dR of the central dome part 121 in the cross-section including the container center line is within the above range, it may also be formed in a continuous or stepped manner.

[0048] In the present embodiment, the grounding edge part 122 is formed into the same shape as a well-known two-piece can, but ideally, it is formed with a relatively narrow width as close to the outer periphery as possible.

[0049] In addition, the present embodiment is the same as a well-known two-piece can made of aluminum alloy, and is manufactured by stamping a 0.20 mm to 0.35 mm thick aluminum alloy plate obtained by laminating a PET film of about 0.01 mm on both sides.

[0050] Thus, when formed into a container, the bottom part that substantially maintains the plate thickness of the material has a plate thickness of 0.20 mm to 0.35 mm, and when the entire height of the container is set to 100%, the plate thickness of the trunk part 110 within the range of 50 ± 10% of the height is 0.10 to 0.22 mm.

[0051] In the present embodiment, in order to be used as a cup, the upper end portion of the trunk part 110 is formed into a shape where the end face does not directly contact the mouth.

[0052] As Figure 2 , Figure 3 shown, when the container 100 is overlapped on the container 100u, in the container 100 of the shape d in the present embodiment,

[0053] (1) The upper end of the outer surface of the middle side portion 111 of the upper container 100 and the upper end vicinity of the inner surface of the upper side portion 113 of the lower container 100u,

[0054] (2) The lower end of the outer surface of the lower side portion 114 of the upper container 100 and the lower end vicinity of the inner surface of the middle side portion 111 of the lower container 100u

[0055] at least one of them contacts and overlaps, and the outer surface of the middle side portion 111 of the upper container 100 and the inner surface of the middle side portion 111 of the lower container 100u do not contact closely in a face-to-face manner.

[0056] On the upper end side of the upper container 100, the protruding portion 112 protrudes from the upper end of the lower container 100u, and the protruding height T of the protruding portion 112 is determined by the height of the upper side portion 113, the height of the lower side portion 114, the shape of the bottom part 120, etc.

[0057] In the present embodiment, the protruding height T is 8.0 mm, and the stacking rate as the ratio of the height T of the protruding portion to the height H of the container 100 is 7.1%.

[0058] It should be noted that the upper side portion 113 and the lower side portion 114 can be formed to expand outward at different angles from the middle side portion 111, either only one of them can be provided, or neither of them can be provided.

[0059] Moreover, the upper side portion 113 and the lower side portion 114 can be formed to narrow inward.

[0060] In the case where the upper side portion 113 and the lower side portion 114 do not exist or are extremely small and the outer surface of the bottom part 120 of the upper container 100 and the inner surface of the bottom part 120 of the lower container 100u can contact closely in a shape, as Figure 5As shown, a bead 115 may also be provided. The bead 115 is an independent contact portion that protrudes toward the inner surface side of the trunk portion 110 and contacts the outer surface of the container that overlaps above, thereby preventing the outer surface of the trunk portion 110 of the upper container 100 from closely contacting the inner surface of the trunk portion 110 of the lower container 100u in a surface-to-surface manner.

[0061] The shape, direction, number, and position of the bead can be arbitrary. It can protrude toward the inner surface side, can protrude toward the outer surface side, or can exist in a mixture on the inner and outer surfaces.

[0062] In addition, as long as it functions as a contact portion, it can be a protruding portion that protrudes from the middle side portion 111 toward the inner surface side and / or the outer surface side in a point or surface manner instead of being in the shape of a bead.

[0063] In addition, it can also be used as a can with a lid member installed after filling the container 100 with beverages or the like.

[0064] As the lid member, it can be any one of a metal stay-on tab lid, a sheet made of a laminate, a screw cap, etc.

[0065] When the lid member is a stay-on tab lid and is double-seamed to the upper end of the trunk portion, it is sufficient that the upper end of the trunk portion of the container is in a state where a flanging process for forming a planar portion is performed after trimming for double-seaming.

[0066] When the lid member is a sheet made of a laminate and is bonded to the upper end of the trunk portion by heat or the like, in order to ensure the bonding area, the upper end of the trunk portion of the container can be set to have a shape with a planar portion. As the sheet made of a laminate, for example, aluminum foil, paper, a resin film, or a laminate material laminating two or more of these can be cited, and a heat-bonding layer (heat-sealing layer) can also be laminated. As the heat-bonding layer, a layer composed of an adhesive such as a lacquer type adhesive, an easy peel adhesive, or a hot melt adhesive, represented by a known sealing film, can be used.

[0067] When the lid member is a screw cap and is screwed to the upper end of the trunk portion, the protruding portion 112 on the upper side portion 113 or the like of the upper end of the trunk portion of the container can be provided with a thread strip, or a lid member with a thread strip and an outlet can be double-seamed to the upper end of the trunk portion of the container in order to screw the screw cap.

[0068] By matching the protruding portion 112 with the installation method of the lid member, the efficiency of storing and transporting the container portion can be improved regardless of which type of lid member is used.

[0069] Symbol Explanation

[0070] 100: Container;

[0071] 101: Upper surface opening;

[0072] 110: Trunk part;

[0073] 111: Middle side part;

[0074] 112: Protrusion;

[0075] 113: Upper side part;

[0076] 114: Lower side part;

[0077] 115: Rib (contact part);

[0078] 120: Bottom;

[0079] 121: Central circular top;

[0080] 122: Grounding edge part;

[0081] θ: Middle side part angle;

[0082] H: Height of the container;

[0083] T: Protrusion height;

[0084] dW: Panel diameter of the central circular top;

[0085] dH: Bottom groove;

[0086] dR: Curvature radius of the central circular top.

Claims

1. A container is a metal container having a bottom and a trunk portion and open at the upper surface side, characterized in that the trunk portion is formed in such a shape that the middle side portion extends outward at an angle of 2° to 15°, and the middle side portion has a surface along the line connecting the outer peripheral surfaces at 10% of the total height of the container and 90% of the total height of the container when the total height of the container is set to 100%. the trunk portion is composed of the middle side portion, an upper side portion near the opening of the container, and a lower side portion connected to the bottom. the outer peripheral surface of the lower side portion and the outer peripheral surface of the upper side portion do not extend outward. When two such containers are overlapped, the protruding portion of the upper container has a height of 20 mm or less from the upper end of the lower container. When the total height of the container is set to 100%, in the range of 50 ± 10% of the height, the plate thickness of the trunk portion is 0.10 to 0.22 mm. The stacking rate, which is the ratio of the protruding portion to the height of the container, is 4% to 15%. The middle side portion has a contact portion that contacts other containers in a point or line manner when overlapping with other containers. The bottom has a dome-shaped central dome portion protruding upward from the can; and an annular grounding edge portion protruding downward from the can on the radially outer side of the central dome portion. The height of the central dome portion from the ground surface of the grounding edge portion is 12% or less of the panel diameter of the central dome portion. The radius of curvature of the central dome portion in the cross-section including the container center line is formed in the range of 1.0 times or more and 6.0 times or less of the panel diameter of the central dome portion.

2. The container according to claim 1, characterized in that, The plate thickness of the bottom is 0.20 mm to 0.35 mm. the trunk portion is formed in such a shape that the middle side portion extends outward at an angle of 3° to 10°, and the middle side portion has a surface along the line connecting the outer peripheral surfaces at 10% of the total height of the container and 90% of the total height of the container when the total height of the container is set to 100%.

3. The container according to claim 1 or 2, characterized in that, The stacking rate, which is the ratio of the protruding portion to the height of the container, is 5% to 9%.

4. A can, characterized in that, A container according to any one of claims 1 to 3; and a lid member installed in a manner to close the opening portion on the upper surface side of the container.

5. The can according to claim 4, wherein The lid member is a metal stay-on tab lid.

6. The can according to claim 4, characterized in that, The lid member is a sheet material composed of a laminate.

7. The can according to claim 4, characterized in that, The lid member is a screw cap.

Images