JP4042859B2 - Beverage can lid and beverage can - Google Patents

Description

The present invention relates to a beverage can for storing various beverages such as soft drinks, carbonated beverages, and alcoholic beverages , and in particular, to close a substantially bottomed cylindrical beverage can body and an upper end opening of the beverage can body . The present invention relates to a beverage can lid.

Usually, a beverage can for containing a beverage has a substantially bottomed cylindrical main body and a can lid for closing the upper end opening of the main body, and after containing the beverage in the main body, By attaching a can lid so as to close the upper end opening, the inside of the beverage can can be sealed.
FIG. 15 is a diagram showing a configuration of a conventional beverage can. Fig.15 (a) has shown the top view of the drink can, FIG.15 (b) has shown sectional drawing seen along arrow DD shown to Fig.15 (a).

  This beverage can has a substantially bottomed cylindrical main body 202 and a can lid 201 for closing the upper end opening of the main body 202. The can lid 201 is, for example, substantially circular in plan view and has a shape corresponding to the upper end opening of the main body 202. The outer peripheral edge portion of the can lid 201 is a bending attachment portion 203 for attaching the can lid 201 to the main body 202, and the bending attachment portion 203 overlaps with an opening edge portion that defines the upper end opening of the main body 202. The can lid 201 is attached to the main body 202 by being bent together (so-called winding).

  The radially inner portion of the can lid 201 is a flat portion 206 formed so as to be lower than the upper end of the bending attachment portion 203 in a state where the can lid 201 is attached to the opening edge portion, and is closer to the periphery. A substantially circular (or substantially elliptical) region surrounded by a so-called score line (cut line) 209 is formed at a predetermined position. This region is an opening forming portion 210 that can be opened by being cut along with a force acting along the direction intersecting the flat surface portion 206. The opening forming portion 210 is opened to tilt the beverage can. Thus, the beverage in the beverage can can flow out to the outside through the opening. Moreover, if a mouth is attached to the peripheral part of the can lid 201 close to the opening and the beverage can is inclined, the beverage flowing out from the opening can be directly drunk.

  A tab 211 that is operated to open the opening forming portion 210 is attached to the flat portion 206 of the can lid 201 by a rivet 212. The tab 211 is of a so-called steion type that does not come off the can lid 201 even after the opening forming portion 210 is opened, and the flat portion 206 from the center portion (near the opening forming portion 210) of the flat portion 206. Along the bent attachment portion 203 side (the side opposite to the opening forming portion 210). A space 24 for inserting a finger is formed between the end of the tab 211 on the bent mounting portion 203 side and the bent mounting portion 203, and the end of the tab 211 is inserted into this space 24. Is operated upward to press the opening forming portion 210 downward at the end of the tab 211 on the opening forming portion 210 side so that the opening forming portion 210 can be opened.

An annular recess 204 is formed at the boundary (peripheral portion of the flat portion 206) with the bent attachment portion 203 in the flat portion 206. By providing the annular recess 204 and increasing the number of times of bending of the peripheral edge of the can lid 201, the can lid 201 is strengthened.
Some beverage cans have a slim type with a relatively small outer diameter (for example, a diameter of about 52 mm). In such a slim type beverage can, the can lid 201 has a small diameter, but in order to allow the beverage in the beverage can to flow out well, the opening forming portion 210 must be secured to a certain size or more. In order to prevent a decrease in operability when opening the opening forming portion 210, the size of the tab 211 must be secured to a certain size or more.

Therefore, in the slim type beverage can, the space 24 between the end of the tab 211 on the side of the folding attachment portion 203 and the bending attachment portion 203 becomes small, and a finger is put into the space 24 to end the end of the tab 211. It becomes difficult to operate the part upward. Although it is conceivable to operate the tab 211 by hooking it to the end of the tab 211, there is a risk of damaging the nail.
In addition, the pressure in the beverage can may be negative and the can lid 201 may be slightly depressed toward the main body 202 side. In this case, the gap between the end of the tab 211 and the flat portion 206 may be reduced. It becomes difficult to put a finger into the tab, and it becomes difficult to operate the end of the tab 211 upward. This is a problem that may occur not only in slim type beverage cans but also in ordinary beverage cans.

Then, like the can for beverages disclosed in Patent Document 1, a notch is formed in the bent attachment portion, and the end portion of the tab is radially outward from the bent attachment portion through the notch. Protruding can be considered. According to such a structure, the edge part of the tab which protruded to the radial direction outer side rather than the bending attachment part can be easily operated upwards.
JP-A-10-250729

However, when a notch is formed in the bend mounting portion, distortion occurs in the bend mounting portion, so that the mounting strength of the can lid with respect to the main body around the notch portion is reduced, and the sealed state in the beverage can is impaired. There is a risk of being.
The present invention has been made under such a background, and can prevent a reduction in mounting strength with respect to a main body (beverage can main body) and can easily operate a tab (operation unit). And it aims at providing a beverage can provided with this beverage can lid .

In order to achieve the above object, the invention according to claim 1 is characterized in that an upper end opening (for example, formed in a substantially circular shape in plan view) of a beverage can body (2 , 3, 02 , 402) having a substantially bottomed cylindrical shape ( 7) A beverage can lid (1, 1A, 1B, 1C , 301 , 401) for closing the beverage can, which is formed at the outer peripheral edge of the beverage can lid and has an upper end opening of the beverage can body. A folding attachment portion (3 , 303 , 403) for attaching the beverage can lid to the opening edge portion by being overlapped with the partitioning opening edge portion (8) and being bent, and the bending attachment portion An annular recess (4 , 304 , 404) that is recessed below the upper end of the bent attachment portion in a state where the beverage can lid is attached to the opening edge, Formed inside the annular recess in the radial direction, the beverage can lid is attached to the opening edge. Annular protrusion protruding in was until above the upper end of the bent attachment part (5, 3 05,405), is formed radially inward of the annular projection, the beverage can lid the opening In a state where it is attached to the edge, it is located below the upper end of the annular convex part, and is located substantially in the same plane as the upper end of the folding attachment part or above the upper end of the bending attachment part. Flat part (6 , 310 , 406) to be formed and an opening forming part that is formed at a predetermined position near the periphery of the flat part and can be cut and opened by a force acting along a direction intersecting the flat part (10 , 3 10 , 410) and a notch (13) formed in the annular convex portion so as to be recessed downward from the upper end in a portion located on the opposite side of the opening forming portion with respect to the center of the flat portion. , 13A, 13B, 13C , 3 13,413) And attached to the flat portion in a state straddling the opening forming portion and the notch, and by operating the end portion on the notch side upward, a force is applied to the opening forming portion to open. operation unit for (11,11B, 11C, 3 11,411) and only contains the rear end portion of the cutout side of the operation portion is opposed to the notch bottom, than the annular projection It is arranged so as not to protrude radially outward, and the notch is in contact with a predetermined position of the operation part, and a space for putting a finger between the rear end part of the operation part and the notch A beverage can lid characterized in that an abutment portion for forming a beverage is formed .

The alphanumeric characters in parentheses indicate corresponding components in the embodiments described later. The same applies hereinafter.
According to this configuration, the annular convex portion is provided separately from the folding attachment portion, and the annular convex portion is provided with a notch. Therefore, unlike the case where a notch is provided in the bending attachment portion, the bending attachment portion is not distorted, so that the attachment strength of the beverage can lid to the beverage can body can be prevented from being lowered.

Therefore, by overlapping and bending the folding attachment portion with the opening edge of the main body, the beverage can lid can be attached to the beverage can main body with high strength, and the notch side end of the operation portion is It can be easily operated from the rear side of the notch (opposite to the flat portion).
Also, by forming the outer diameter of the annular convex portion small, when the opening forming portion is opened, the beverage can body is tilted by attaching a mouth to the peripheral edge portion of the annular convex portion adjacent to the opening, and from the opening to the outside If the drink flowing out directly is taken, the upper lip can be prevented from reaching the flat surface by the annular convex portion, and the upper lip can be prevented from contacting the peripheral edge of the opening. Therefore, it is possible to prevent the lips from coming into contact with the peripheral edge of the opening and being injured.

  Since the annular convex portion is provided separately from the bent attachment portion, the annular convex portion can be formed in various shapes without reducing the attachment strength of the bent attachment portion to the beverage can body. For example, the annular convex portion may have a substantially trapezoidal shape with a smooth cross-sectional shape. Further, the annular convex portion may have a shape that extends upward, or may have a shape that is inclined radially outward. You may change the shape of an annular convex part partially. In this case, for example, a portion close to the opening forming portion of the annular convex portion may be formed so as to protrude outward in the radial direction (for example, in a substantially V-shaped plane).

Further, according to the configuration of the present invention, since the operation part is arranged in a state straddling the opening forming part and the notch, even a visually impaired person or the like finds the notch by groping. The end portion on the notch side of the operation portion can be easily operated.
Furthermore, by providing the annular recess, the number of times of bending of the peripheral edge of the beverage can lid can be increased, and the strength of the beverage can lid can be improved.

  In the conventional beverage can as shown in FIG. 15, the strength of the beverage can lid is improved by forming an annular recess at the boundary with the bent attachment portion in the plane portion. In the configuration, when garbage enters the annular recess, the dust cannot be easily removed, and the beverage that has flowed out from the opening formed by the opening forming portion onto the flat portion enters the annular recess. The beverage in which the garbage in the annular recess is mixed is unsanitary.

According to the structure of this invention, since the annular recessed part is not formed in the plane part, the dust on a plane part can be removed easily and it is hygienic.
Moreover, since the operation part is disposed in a state of straddling the opening forming part and the notch, the operation part can be prevented from rotating in the horizontal plane around the mounting position. Therefore, when the operation portion rotates around the mounting position and the end portion on the notch side of the operation portion is operated upward, the opening formation portion cannot be favorably applied, and the opening formation portion is It is possible to prevent a situation in which the opening cannot be made satisfactorily.

  Furthermore, compared with the conventional beverage can lid as shown in FIG. 15, the height of the bent attachment portion with respect to the flat portion is set low, so that the same amount of beverage as the conventional beverage can is accommodated. Therefore, when the height of the flat portion is set to be substantially the same as the height of the flat portion of the conventional beverage can lid, the height of the beverage can body can be reduced. Thereby, since the material used for shaping | molding of a drink can main body can be reduced, the manufacturing cost of a drink can can be reduced.

Furthermore, since the flat portion is smaller than the conventional beverage can lid as shown in FIG. 15, the strength of the flat portion is increased. Therefore, there is little deformation of the flat surface due to the pressure in the beverage can, and the flat surface can be formed thinner, so that the manufacturing cost of the beverage can lid can be reduced.
The operating unit has its end after the cutout side is arranged opposite to the notch bottom. Further, the operating unit, its ends after the cutout side that are arranged so as not to protrude radially outward from the annular projection. Therefore, for example, when transportation of beverage cans, external force is applied to the end after the cut-out side of the operation unit, it is possible to prevent the opening forming portion will open.

The bottom surface of the notch is preferably located above the top surface of the flat portion. According to this structure, it can prevent that the beverage which flowed out on the plane part from the opening formed of the opening formation part leaks out of the annular convex part from the notch .

Further, since the space for admitting fingers between-out end portion and the notch after the operation portion is formed, at one end the bottom of the rear end side of the operation unit via the space from the cutout rear side You can hook your finger. Therefore, it is possible to open the opening forming portion is operated upward easily end after the operation unit.
The abutting portion abuts on both ends of the rear end portion of the operation unit, may be configured to form a space for inserting a finger between-out and the cut-out the rear end.

The notch may include a bottom surface and an inclined surface that connects both ends of the bottom surface to the upper end of the annular convex portion, and the contact portion may be provided on the inclined surface.
According to a second aspect of the invention, the above-mentioned rear end portion of the operation portion, two and rising piece extending upward, and connecting piece and is formed for connecting the upper ends of these two rising piece, 2. The beverage can lid according to claim 1, wherein the abutting portion is a bottom surface of the notch, and each lower end of the rising piece is in contact with a bottom surface of the notch .
According to this configuration, the lower ends of the two rising pieces are in contact with the bottom surface of the notch. In this state, since a space is formed by a certain interval between the connection piece of the operation part and the bottom surface of the notch, the lower surface of the connection piece of the operation part through the space from the outside of the notch You can hook your finger. Accordingly, the opening portion can be opened by easily operating the rear end portion of the operation portion upward.

According to a third aspect of the present invention, the operation portion is formed with an operation convex portion by forming a narrow width of the rear end portion, and the contact portion is a bottom surface of the notch. The bottom surface of the notch is formed with a depression that is concavely curved downward, and the operation convex portion has a bottom surface that abuts on the bottom surface of the notch and a rear end portion located above the depression. It is a can lid | cover for drinks of Claim 1 or 2 characterized by the above-mentioned.
According to this configuration, a depression concavely curved downward is formed on the bottom surface of the notch. Further, the operation convex portion of the operation portion has a lower surface in contact with the bottom surface of the notch and a rear end portion located above the recess. Thus, a space is formed between the rear end portion of the operation convex portion and the depression. Accordingly, since the finger can be hooked from the outside of the notch to the lower surface of the operation convex portion of the operation portion through the space, the rear end portion of the operation portion is easily operated upward to open the opening forming portion. be able to.

請 Motomeko 4 the described invention, a cover is tightened covered with the annular projection, we claim 1, characterized by further comprising a strap for connecting the said cover and the operating unit 3 It is a can lid | cover for drinks in any one of.

According to this structure, since the cyclic | annular convex part which makes a mouth when drinking the drink in a drink can directly can be covered with a cover, it is clean. It is also possible to store the promotional items in the space in the annular convex portion covered with the cover. Moreover, since the cover and the operation part are connected by the strap, it is possible to prevent the cover from being separated from the beverage can lid and lost. Further, when opening the opening forming portion by operating the operating portion, the opening forming portion can be easily opened by pulling the cover connected to the operating portion upward. Further, in a state where the cover is fastened to the annular convex portion, the strap is accommodated in the annular convex portion and is not exposed to the outside, so that it is possible to prevent the opening forming portion from being inadvertently opened due to an external force applied to the strap.

It is preferable that the bottom surface of the annular convex portion comes into contact with the lower end surface of the cover when the cover is attached to the beverage can lid.
A fifth aspect of the present invention is a beverage can comprising the beverage can lid according to any one of the first to fourth aspects.

Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is a perspective view of a beverage can to which a can lid 1 according to an embodiment of the present invention is applied. The description will be made assuming that the right rear side in FIG. 1 is the rear and the left front side is the front.
This beverage can is a hollow container for storing various beverages such as soft drinks, carbonated beverages, and alcoholic beverages, and closes the substantially bottomed cylindrical main body 2 and the upper end opening of the main body 2. The can lid 1 is provided. This beverage can is a slim type whose outer diameter of the main body 2 is relatively small (for example, the diameter is about 52 mm), and its upper end portion is tapered.

FIG. 2 is a plan view of the beverage can, and FIG. 3 is a rear view of the beverage can. 4 is a cross-sectional view taken along the arrow AA shown in FIG.
1 to 4, can lid 1 is substantially circular in a plan view, and an outer peripheral edge portion of can lid 1 is formed by pressing a single metal plate (for example, an aluminum plate). , The annular recess 4 formed on the inner side in the radial direction of the bent mounting portion 3, the annular convex portion 5 formed on the inner side in the radial direction of the annular recess 4, and the annular convex portion 5. It is shape | molded by the curved shape which has the plane part 6 formed in the radial inside. Each central axis of the bending attachment portion 3, the annular recess 4, the annular projection 5, and the flat portion 6 is located on the center axis of the can lid 1.

  The bending attachment portion 3 is disposed above the opening edge portion 8 that defines the upper end opening 7 of the main body 2, and is bent a plurality of times outward in the radial direction with the bending attachment portion 3 overlapped with the opening edge portion 8. As a result, the opening edge portion 8 is wound around the bending attachment portion 3 (so-called tightening), and the can lid 1 is attached to the main body 2 (see FIG. 4). After the beverage is stored in the main body 2, the inside of the beverage can can be sealed by attaching the can lid 1 to the main body 2 as described above.

The annular recess 4 has a shape that is depressed downward by a predetermined amount (for example, 2.5 mm or more) from the upper end of the bending attachment portion 3 in a state where the can lid 1 is attached to the opening edge portion 8. The annular recess 4 is formed such that the radially inner wall surface is inclined with respect to the vertical direction and is separated from the opposing wall surface (radially outer wall surface) as it goes upward.
In addition, the annular convex portion 5 protrudes upward by a predetermined amount (for example, 3 mm or more) from the upper end of the bending attachment portion 3 in a state where the can lid 1 is attached to the opening edge portion 8. The annular convex portion 5 is formed such that the radially outer and radially inner wall surfaces are inclined with respect to the vertical direction, and are separated from each other as the wall surfaces move downward. That is, the annular convex portion 5 has a substantially trapezoidal shape with a smooth cross-sectional shape, and has a bottom width of about 2 mm and a height of 2 mm or more, for example. The lower end of the radially outer wall surface of the annular protrusion 5 is continuous with the upper end of the radially inner wall surface of the annular recess 4.

  The flat surface portion 6 is a portion that is substantially flat in the horizontal direction and is located below the upper end of the annular convex portion 5 by a predetermined amount (for example, 2 mm or more), and the can lid 1 is attached to the opening edge portion 8. And is located in substantially the same plane as the upper end of the bending attachment portion 3 (see FIG. 4). However, the plane portion 6 may be positioned above the upper end of the bending attachment portion 3 in a state where the can lid 1 is attached to the opening edge portion 8.

  A substantially circular (or substantially elliptical) region surrounded by a so-called score line (cut line) 9 is formed at a position near the front of the flat portion 6. This region is an opening forming portion 10 that can be opened by being cut by a force acting along a direction intersecting the plane portion 6, and at the stage of manufacturing a beverage can, the peripheral portion of the opening forming portion 10 The portion of the score line 9 is coupled to the flat surface portion 6 and the inside of the beverage can is sealed, but the tab 11 attached to the flat surface portion 6 is operated to push downward on the opening forming portion 10. When the pressure acts, a part of the opening forming part 10 is cut off from the flat part 6 along the score line 9, and an opening is formed. By opening the opening forming part 10 and tilting the beverage can, the beverage in the beverage can can flow out to the outside through the opening.

  The tab 11 is attached to the center of the flat portion 6 of the can lid 1 by a rivet 12. The tab 11 is of a so-called steion type that does not come off the can lid 1 even after the opening forming portion 10 is opened, and the flat portion 6 from the center of the flat portion 6 (near the opening forming portion 10). It extends rearward (on the opposite side to the opening forming portion 10) along the upper surface of the. The ratio of the length of the tab 11 on the front side of the rivet 12 and the length of the rear side of the rivet 12 is, for example, 3: 7. When opening the opening forming portion 10, the rear end portion of the tab 11 is operated upward, so that the tab 11 rotates in the vertical direction around the rivet 12, and the front end portion of the tab 11 is lowered downward. The opening forming portion 10 is pressed downward by the front end portion. The width of the tab 11 is smaller than the width of the opening forming portion 10.

  A cutout 13 is formed in the annular convex part 5 so as to be recessed downward from the upper end on the opposite side of the opening forming part 10 with respect to the center of the flat part 6. The bottom surface 131 of the notch 13 is a flat surface extending in the horizontal direction at a position higher than the top surface of the flat portion 6 and has a width narrower than the width of the tab 11 (see FIG. 3). However, the bottom surface 131 of the notch 13 may be located in the same plane as the top surface of the flat portion 6.

  The left and right ends of the bottom surface 131 of the notch 13 are respectively connected to the upper end of the annular convex portion 5 via the inclined surface 132. The inclined surface 132 of the notch 13 may be a curved surface that is smoothly concavely curved, or may be a flat surface that is inclined at a predetermined angle with respect to the horizontal direction. The distance between the upper ends of the inclined surfaces 132 is set larger than the width of the tab 11. The notch 13 may be formed at the same time as the annular convex portion 5 is formed at the time of pressing, or may be formed by pressing a predetermined position of the annular convex portion 5 formed by pressing from above. Good.

The rear end portion of the tab 11 is disposed at a position facing the bottom surface 131 of the notch 13, and the left and right side portions thereof are in contact with the left and right inclined surfaces 132, respectively. With such a configuration, a constant interval (for example, 0.5 mm or more) is provided between the rear end portion of the tab 11 and the bottom surface 131 of the notch 13 (see FIGS. 3 and 4). The rear end of the tab 11 is disposed so as not to protrude radially outward from the annular convex portion 5 (see FIG. 2) .

According to the configuration of this embodiment, the annular convex portion 5 is provided separately from the bending attachment portion 3, and the notch 13 is provided in the annular convex portion 5. Therefore, unlike the case where a notch is provided in the bending attachment portion, the bending attachment portion is not distorted, so that the attachment strength of the can lid to the main body can be prevented from being lowered.
Therefore, the can lid 1 can be attached to the main body 2 with high strength by overlapping the bending attachment portion 3 with the opening edge 8 of the main body 2 and facing the notch 13 of the annular convex portion 5. The rear end portion of the tab 11 arranged in this manner can be easily operated from the rear side of the notch 13.

  Since the annular convex portion 5 is provided separately from the bent attachment portion 3, the annular convex portion 5 can be formed into various shapes without reducing the attachment strength of the bent attachment portion 3 to the main body 2. . For example, the shape of the annular protrusion 5 is not limited to the above shape, and the width and height may be smaller or larger. Further, the annular convex portion 5 is not limited to a shape extending upward, and may be, for example, a shape inclined radially outward. In this case, it is possible to prevent the beverage from dripping from the upper end of the annular protrusion 5. You may change the shape of the cyclic | annular convex part 5 partially. In this case, for example, if a portion of the annular convex portion 5 that is close to the opening forming portion 10 is formed so as to protrude radially outward (for example, substantially V-shaped in a plane), the beverage can be easily poured from the protruding portion. (If you drink directly, it is easy to drink).

Further, according to the configuration as in this embodiment, the rear end portion of the tab 11 is disposed so as to face the notch 13 of the annular convex portion 5, so that even a person who is blind or the like may notch 13 By searching for this, it is possible to easily operate the rear end portion of the tab 11 arranged to face the notch 13.
Furthermore, by providing the annular recess 4, the number of times of bending of the peripheral portion of the can lid 1 can be increased, and the strength of the can lid 1 can be improved.

  In the conventional beverage can as shown in FIG. 15, the strength of the can lid 201 is improved by forming the annular recess 204 at the boundary between the flat portion 206 and the bent attachment portion 203. In such a configuration, when garbage enters the annular recess 204, the garbage cannot be easily removed, and the beverage that has flowed out from the opening formed by the opening forming portion 210 onto the flat surface portion 206 is annular. Since it enters into the recess 204, it is unsanitary to drink a beverage in which garbage in the annular recess 204 is mixed.

According to the configuration as in this embodiment, since the annular recess is not formed in the plane portion 6, dust on the plane portion 6 can be easily removed, and it is hygienic.
Further, since the rear end portion of the tab 11 is accommodated in the notch 13, the tab 11 can be prevented from rotating in the horizontal plane around the rivet 12. Therefore, when the tab 11 rotates around the rivet 12 and the rear end portion of the tab 11 is operated upward, the opening forming portion 10 cannot be applied with good force, and the opening forming portion 10 is good. It is possible to prevent such a situation that it cannot be opened.

Furthermore, since the rear end portion of the tab 11 is arranged so as not to protrude radially outward from the annular convex portion 5, an external force is applied to the rear end portion of the tab 11 during transportation of the beverage can, It can prevent that the opening formation part 10 opens.
Furthermore, since the bottom surface 131 of the notch 13 is located above the upper surface of the flat portion 6, the beverage that has flowed out from the opening formed by the opening forming portion 10 onto the flat surface portion 6 has an annular convex shape from the notch 13. Leakage to the outside of the part 5 can be prevented.

  In addition, since a space 14 is formed by a predetermined interval between the rear end portion of the tab 11 and the bottom surface 131 of the notch 13 (see FIGS. 3 and 4), from the rear side of the notch 13. A finger can be hooked on the lower portion of the rear end of the tab 11 through the space 14. Accordingly, the opening forming portion 10 can be opened by easily operating the rear end portion of the tab 11 upward. At this time, in a state where the can lid 1 is attached to the opening edge portion 8, the flat surface portion 6 is located substantially in the same plane as the upper end of the bending attachment portion 3, so that the rear end portion of the tab 11 is behind. The bending attachment portion 3 is not positioned, and the rear end portion of the tab 11 can be easily operated.

Furthermore, since the flat part 6 is small compared with the conventional can lid 101 as shown in FIG. 15, the intensity | strength of the flat part 6 becomes high. Therefore, there is little deformation of the flat surface portion 6 due to the pressure in the beverage can and the flat surface portion 6 can be formed thinner, so that the manufacturing cost of the can lid 1 can be reduced.
FIG. 5 is a partial cross-sectional view for explaining a difference in aspect from the conventional can lid 201 when the can lid 1 according to this embodiment is attached to the main body 2. FIG. 5A shows a mode when the conventional can lid 201 is attached to the main body 202, and FIG. 5B shows a mode when the can lid 1 according to this embodiment is attached to the main body 2. ing.

As shown in FIG. 5, in a state before the can lid 1, 201 is attached to the main body 2, 202 of the beverage can, the bent attachment portions 3, 203 of the can lid 1, 201 and the opening edge of the main body 2, 202 8, 208 extend so as to be smoothly curved outward in the radial direction.
In the conventional can lid 201, the bent attachment portion 203 is formed so as to extend above the flat portion 206. Therefore, when the can lid 201 is attached to the beverage can main body 202, the flat portion 206 is the main body. The opening edge portion 208 of the main body 202 is overlapped with the outside of the bending attachment portion 203 so as to enter the inside 202 (see FIG. 5A).

On the other hand, in the can lid 1 according to this embodiment, the bent attachment portion 3 is located in substantially the same plane as the horizontal plane on which the plane portion 6 is located or below the horizontal plane. When the can lid 1 is attached, even when the can lid 1 is arranged so that the opening edge 8 of the main body 2 is superimposed on the outside of the bent attachment portion 3, the flat portion 6 does not enter the main body 2 (FIG. 5 (b)).
In order to store the same amount of beverage as the conventional beverage can in the beverage can according to this embodiment, the height of the flat portion 6 of the can lid 1 is set with the can lid 1 attached to the main body 2. The height of the flat portion 206 of the conventional can lid 201 needs to be substantially the same. In this embodiment, compared to the conventional can lid 201, the height of the bending attachment portion 3 with respect to the flat portion 6 is set low, so the height of the flat portion 6 is set to the flat portion of the conventional can lid 201. When the height is approximately the same as the height 206, the height of the main body 2 of the beverage can can be reduced. Thereby, since the material used for shaping | molding of the main body 2 of a drink can can be reduced, the manufacturing cost of a drink can can be reduced.

FIG. 6 is a partial cross-sectional view showing a state in which a plurality of can lids 1 are stacked.
As shown in FIG. 6, when transporting the can lid 1 according to this embodiment, a plurality of can lids 1 are stacked on the same axis. The surface of the can lid 1 is painted to prevent corrosion or the like of the can lid 1. When a plurality of can lids 1 are stacked, the surfaces of the can lids 1 come into contact with each other, so that the surfaces of the can lids 1 are rubbed by vibrations during transportation, and the surface of the can lid 1 is coated. There is a risk of injury.

  As described above, since the tab 11 is attached to the flat surface portion 6, when a configuration in which the flat surface portions 6 come into contact with each other when a plurality of can lids 1 are stacked, a stable stacked state is maintained. Is difficult, and the surface of the can lid 1 is easily damaged. In particular, since the annular convex portion 5 is a portion that makes a mouth when drinking a beverage in the beverage can directly, it is not preferable that the surface of the annular convex portion 5 is damaged.

  Therefore, in this embodiment, as shown in FIG. 6, when a plurality of can lids 1 are stacked, the upper surface of the lower can lid 1 and the lower surface of the upper can lid 1 are mutually flat portions 6 or The dimensions are designed so as not to contact the annular projection 5. More specifically, the upper can lid is located near the upper end of the radially outer wall surface of the annular recess 4 on the upper surface of the lower can lid 1 (near the boundary between the annular recess 4 and the bent attachment portion 3). A receiving portion 41 for receiving the vicinity of the bottom of the annular recess 4 on the lower surface of 1 is configured.

In order to design the can lid 1 with the above dimensions, the distance d1 between the upper surface of the lower end portion of the annular recess 4 in the lower can lid 1 and the lower surface of the lower end portion of the annular recess 4 in the upper can lid 1 is designed. However, it is preferable that the distance between the lower surface of the flat surface portion 6 and the lower surface of the upper end portion of the annular convex portion 5 (a protruding amount of the annular convex portion 5 with respect to the flat surface portion 6) d2 or more.
According to such a configuration, the height of the annular protrusions 5 and the annular recesses 4 are set on condition that the notches 13 formed in the annular protrusions 5 of the plurality of can lids 1 are stacked so as to overlap in plan view. Regardless of the depth, the plurality of can lids 1 can be stacked so that the flat portions 6 and the annular convex portions 5 do not contact each other.

  However, in the case of the configuration in which the notch 13 is formed in the annular convex portion 5 of the can lid 1 as in this embodiment, the height of the annular convex portion 5 is not constant. When the cutouts 13 are not stacked so as to overlap in plan view, the upper surface of the upper end portion of the annular convex portion 5 (portion other than the cutout 13) in the lower can lid 1 is annular in the upper can lid 1. There is a case where the lower surface of the lower end portion of the notch 13 of the convex portion 5 is contacted.

Thus, in this embodiment, the distance d3 between the upper surface of the lower end portion of the annular recess 4 and the lower surface of the plane portion 6 (depth of the annular recess 4 with respect to the plane portion 6) d3 is the protrusion amount of the annular projection 5 with respect to the plane portion 6. It is designed to be d2 or more.
According to such a configuration, even when the cutouts 13 of the plurality of can lids 1 are not stacked so as to overlap in plan view, the annular convex portion 5 (part other than the cutouts 13) in the lower can lid 1. ) Does not come into contact with the lower surface of the lower end portion of the notch 13 of the annular convex portion 5 in the upper can lid 1. Therefore, a plurality of can lids 1 can always be laminated in a stable state, and the surface of the can lid 1 can be prevented from being damaged.

FIG. 7 is a perspective view showing a configuration of a can lid 1A according to a first modification. FIG. 8 is a cross-sectional view taken along arrow BB shown in FIG. However, in FIG. 7, the tab 11 is omitted.
The can lid 1A according to the first modified example is different from the above embodiment only in the shape of the notch 13A formed in the annular convex portion 5, and the can lid according to the above embodiment with respect to the configuration of other parts. Same as 1. Therefore, about the structure similar to the can lid 1 which concerns on the said embodiment, the same code | symbol is attached | subjected to a figure and the description is abbreviate | omitted.

  Referring to FIGS. 7 and 8, bottom surface 131 </ b> A of notch 13 </ b> A is a flat surface extending in the horizontal direction at a position higher than the top surface of flat portion 6, and has a width that substantially matches the width of tab 11. ing. The left and right ends of the bottom surface 131A are respectively continuous with the upper end of the annular convex portion 5 via the inclined surface 132A. The inclined surface 132A may be a curved surface that is smoothly concavely curved, or may be a flat surface that is inclined at a predetermined angle with respect to the horizontal direction. The rear end portion of the tab 11 is disposed at a position facing the bottom surface 131A of the notch 13A. In this modification, since the width of the bottom surface 131A of the notch 13A is larger than the width of the tab 11, the lower surface of the rear end portion of the tab 11 is in contact with the bottom surface 131A of the notch 13A.

  On the rear side of the bottom surface 131 </ b> A, a recess 15 that is smoothly concavely curved downward and continuous to the annular recess 4 is formed. Thereby, the rearmost end portion of the tab 11 is positioned above the recess 15, and a space 16 is formed between the rearmost end portion and the recess 15. Accordingly, a finger can be hooked from the radially outer side of the notch 13A to the lower end of the rear end of the tab 11 via the space 16, so that the rear end of the tab 11 can be easily operated upward so that the opening forming portion 10 can be moved. It can be opened.

  The shape of the notch 13A formed in the annular convex portion 5 is not limited to the shape as in the first modification example, and various shapes can be employed. For example, the bottom surface 131 </ b> A of the notch 13 </ b> A is not limited to a flat surface, and may be constituted by, for example, a surface recessed downward in a substantially V shape or a curved surface concavely curved downward. Even in such a configuration, a space is formed between the rear end portion of the tab 11 and the bottom surface 131A of the notch 13A (the lowermost portion of the substantially V-shaped surface or the lowermost portion of the concave curved surface). Therefore, it is possible to hook a finger from the outside of the notch 13A to the lower portion of the rear end of the tab 11 through the space, and the rear end portion of the tab 11 is easily operated upward to open the opening forming portion 10. be able to.

  FIG. 9 is a perspective view illustrating a configuration of a can lid 1B according to a second modification. The can lid 1B according to the second modified example is different from the above embodiment only in the shape of the notch 13B formed in the annular convex portion 5 and the shape of the tab 11B, and the configuration of the other parts is described above. This is the same as the can lid 1 according to the embodiment. Therefore, about the structure similar to the can lid 1 which concerns on the said embodiment, the same code | symbol is attached | subjected to a figure and the description is abbreviate | omitted.

  Referring to FIG. 9, bottom surface 131B of notch 13B is a flat surface extending in the horizontal direction at a position higher than the upper surface of flat portion 6, and has a width that substantially matches the width of tab 11B. The left and right ends of the bottom surface 131B are respectively continuous with the upper end of the annular convex portion 5 via the inclined surface 132B. The inclined surface 132B may be a curved surface that is smoothly concavely curved, or may be a flat surface that is inclined at a predetermined angle with respect to the horizontal direction. The rear end portion of the tab 11B is disposed at a position facing the bottom surface 131B of the notch 13B.

  In this modified example, at the rear end portion of the tab 11B, two rising pieces 17 extending upward from the left and right ends of the rear end portion, and a connecting piece 18 for connecting the upper ends of these two rising pieces 17 are connected. And are formed. Since the width of the bottom surface 131B of the notch 13B is larger than the width of the tab 11, the lower ends of the two rising pieces 17 are in contact with the bottom surface 131B of the notch 13B. In this state, since a space 19 is formed by a certain interval between the connecting piece 18 of the tab 11B and the bottom surface 131B of the notch 13B, the tab 19 is formed from the outside of the notch 13B via the space 19. A finger can be hooked on the lower surface of the connecting piece 18 of 11B. Accordingly, the opening forming portion 10 can be opened by easily operating the rear end portion of the tab 11B upward.

  FIG. 10 is a perspective view showing a configuration of a can lid 1C according to a third modification. The can lid 1C according to the third modified example is different from the above embodiment only in the shape of the notch 13C formed in the annular convex portion 5 and the shape of the tab 11C. This is the same as the can lid 1 according to the embodiment. Therefore, about the structure similar to the can lid 1 which concerns on the said embodiment, the same code | symbol is attached | subjected to a figure and the description is abbreviate | omitted.

  Referring to FIG. 10, the bottom surface 131 </ b> C of the notch 13 </ b> C is a flat surface extending in the horizontal direction at a position higher than the top surface of the flat portion 6, and has a width smaller than the width of the tab 11 </ b> C. The left and right ends of the bottom surface 131C are respectively continuous with the upper end of the annular convex portion 5 via the inclined surface 132C. The inclined surface 132C may be a curved surface that is smoothly concavely curved, or may be a flat surface that is inclined at a predetermined angle with respect to the horizontal direction. The rear end portion of the tab 11C is disposed at a position facing the bottom surface 131C of the notch 13C.

In this modification, the tab 11 </ b> C is formed with the operation convex portion 20 by forming the rear end portion with a narrow width. The width of the bottom surface 131C of the notch 13C is substantially the same as the width of the operation convex portion 20, and the lower surface of the operation convex portion 20 is in contact with the bottom surface 131C of the notch 13C.
On the rear side of the bottom surface 131C, a recess 21 that is smoothly concavely curved downward is formed. Thereby, the rear end portion of the operation convex portion 20 of the tab 11 </ b> C is positioned above the recess 21, and a space 22 is formed between the rear end portion of the operation convex portion 20 and the recess 21. Therefore, a finger can be hooked from the outside of the notch 13C to the lower surface of the operation convex portion 20 of the tab 11C via the space 22, so that the rear end portion of the tab 11C can be easily operated upward to form the opening forming portion. 10 can be opened.

Figure 11 is a plan view showing the configuration of the can lid 101. 12 is a cross-sectional view taken along the arrow CC shown in FIG. 11 and 12 will be described with the right side as the rear and the left side as the front.
This can lid 101 has a substantially circular shape in plan view, a metal plate (e.g., aluminum plate) by is pressing, bending mounting portion formed on the outer peripheral edge of the can lid 101 103, an annular concave portion 104 formed on the radially inner side of the bent mounting portion 103, an annular convex portion 105 formed on the radial inner side of the annular concave portion 104, and a radially inner side of the annular convex portion 105. It is formed into a curved shape having a flat portion 106.

  The bending attachment portion 103 is disposed above the opening edge portion that defines the upper end opening 107 of the main body 102, and a plurality of bending attachment portions 103 are bent outward in the radial direction in a state where the bending attachment portion 103 is overlapped with the opening edge portion. As a result, the opening edge portion is wound around the folding attachment portion 103 (so-called tightening), and the can lid 101 is attached to the main body 102. After the beverage is stored in the main body 102, the inside of the beverage can can be sealed by attaching the can lid 101 to the main body 102 as described above.

The annular recess 104 has a shape that is recessed downward by a predetermined amount (for example, 2.5 mm or more) from the upper end of the bending attachment portion 103 in a state where the can lid 101 is attached to the opening edge portion. The annular recess 104 is formed such that its radially inner wall surface is inclined with respect to the vertical direction and is separated from the opposing wall surface (radially outer wall surface) as it goes upward.
Further, the annular convex portion 105 protrudes upward by a predetermined amount (for example, 3 mm or more) from the upper end of the bending attachment portion 103 in a state where the can lid 101 is attached to the opening edge portion. The annular convex portion 105 is formed such that the radially outer and radially inner walls are inclined with respect to the vertical direction, and are separated from each other as the walls move downward. That is, the annular convex portion 105 has a substantially trapezoidal shape with a smooth cross-sectional shape, and has a bottom width of about 2 mm and a height of 2 mm or more, for example. The lower end of the radially outer wall surface of the annular protrusion 105 is continuous with the upper end of the radially inner wall surface of the annular recess 104.

  The flat portion 106 is a portion that is substantially flat in the horizontal direction and is located below the upper end of the annular convex portion 105 by a predetermined amount (for example, 2 mm or more), and the can lid 101 is attached to the opening edge. It is located in substantially the same plane as the upper end of the bending attachment portion 103. However, the flat surface portion 106 may be positioned above the upper end of the bending attachment portion 103 in a state where the can lid 101 is attached to the opening edge portion.

In the beverage can provided with the can lid 101, the central axis of the folding attachment portion 103 is located on the central axis of the can lid 101, but the central axes of the annular convex portion 105 and the flat portion 106 are the can axis. The center axis of the lid 101 is deviated. More specifically, the annular convex portion 105 and the flat portion 106 are formed at positions closer to the front of the can lid 101, and the central axis of the can lid 101 is located at the rear end portion of the flat portion 106.

  The flat portion 106 is formed with a substantially circular (or substantially elliptical) region surrounded by a score line 109 formed along the peripheral edge thereof (inside of the annular convex portion 105 in the radial direction). This region is an opening forming portion 110 that can be opened by being cut by a force acting along the direction intersecting the flat surface portion 106, and at the stage of manufacturing the beverage can, the peripheral portion of the opening forming portion 110 The portion of the score line 109 is coupled to the flat surface portion 106 and the inside of the beverage can is sealed, but the tab 111 attached to the flat surface portion 106 is operated to push the opening portion 110 downward. When pressure is applied, a part of the opening forming part 110 is separated from the flat part 106 along the score line 109, and an opening is formed. By opening the opening forming part 110 and tilting the beverage can, the beverage in the beverage can can flow out to the outside through the opening.

  The tab 111 is attached to the rear end portion (center portion of the can lid 101) of the flat portion 106 of the can lid 101 by a rivet 112. The tab 111 is of a so-called steion type that does not come off the can lid 101 even after the opening forming portion 110 is opened, and the flat portion 106 from the center of the can lid 101 (near the opening forming portion 110). And extends rearward (opposite to the opening forming portion 110). The ratio of the length of the tab 111 on the front side of the rivet 112 and the length of the rear side of the rivet 112 is, for example, 3: 7. When opening the opening forming portion 110, the rear end portion of the tab 111 is operated upward, so that the tab 111 rotates in the vertical direction around the rivet 112, and the front end portion of the tab 111 is lowered downward. The opening forming portion 110 is pressed downward by the front end portion. The width of the tab 111 is smaller than the width of the opening forming portion 110.

A cutout 113 is formed in the annular convex portion 105 so as to be recessed downward from the upper end on the opposite side of the opening forming portion 110 with respect to the center of the flat portion 106. The bottom surface 113 </ b> A of the notch 113 is a flat surface formed at a position higher than the top surface of the flat portion 106. However, the bottom surface 113 </ b> A of the notch 113 may be located in the same plane as the top surface of the flat portion 106.
The distance between the upper ends of the notches 113 is set larger than the width of the tab 111. The notch 113 may be formed at the same time as the annular protrusion 105 is formed at the time of pressing, or may be formed by pressing the annular protrusion 105 formed by pressing from above.

  The tab 111 is disposed so as to extend rearwardly through the notch 113, and the center part in the front-rear direction is in contact with the bottom surface 113 </ b> A of the notch 113. With such a configuration, the portion (rear side portion) from the center in the front-rear direction of the tab 111 to the rear end is positioned above the annular recess 104, and there is a constant gap between the rear portion of the tab 111 and the annular recess 104. The space 23 is formed.

According to good Una construction of this separately annular projection 105 is provided with bent mounting portion 103, the notch 113 in the annular protrusion 105 is provided. Therefore, unlike the case where a notch is provided in the bending attachment portion, the bending attachment portion is not distorted, so that the attachment strength of the can lid to the main body can be prevented from being lowered.
Therefore, by bending the folding attachment portion 103 so as to overlap the opening edge portion of the main body 102, the can lid 101 can be attached to the main body 102 with high strength and through the notch 113 of the annular convex portion 105. The rear portion of the tab 111 extending rearward can be easily operated from the rear side of the notch 113.

  Further, since the outer diameter of the annular convex portion 105 is smaller than that of the first embodiment, when the opening forming portion 110 is opened, a mouth is attached to the peripheral portion of the annular convex portion 105 adjacent to the opening. If the main body 102 is tilted and a beverage that flows out from the opening is directly taken, the upper lip can be prevented from reaching the flat surface by the annular convex portion 105 and the upper lip can be prevented from contacting the peripheral edge of the opening. Therefore, it is possible to prevent the lips from coming into contact with the peripheral edge of the opening and being injured. In particular, as in this embodiment, the configuration in which the opening forming portion 110 is formed immediately inside the annular convex portion 105 in the radial direction prevents the lips from contacting the peripheral edge of the opening more effectively. it can.

  Since the annular protrusion 105 is provided separately from the bending attachment portion 103, the annular protrusion 105 can be formed in various shapes without reducing the attachment strength of the bending attachment portion 103 to the main body 102. . For example, the shape of the annular convex portion 105 is not limited to the above shape, and the width and height may be smaller or larger. Further, the annular convex portion 105 is not limited to a shape extending upward, and may be, for example, a shape inclined radially outward. In this case, it is possible to prevent the beverage from dripping from the upper end of the annular convex portion 105. The shape of the annular convex portion 105 may be partially changed. In this case, for example, if a portion of the annular convex portion 105 adjacent to the opening forming portion 110 is formed so as to protrude radially outward (for example, in a substantially V-shaped plane), it is easy to pour a beverage from the protruding portion. (If you drink directly, it is easy to drink). Also, the annular convex portion 105 may be formed in a heart shape by smoothly concavely bending the rear end portion of the annular convex portion 105 toward the front side, and the rear end portion of the annular convex portion 105 may be formed as a tab. The annular convex portion 105 may be formed in a substantially elliptical shape that is long in the front-rear direction by extending to a position facing the rear end portion of 111.

Further, according to good Una construction of this, since the tab 111 extends through the cutout 113 of annular projection 105 in the longitudinal direction, in such blind people, by finding a notch 113 blindly The rear portion of the tab 111 extending rearward through the notch 113 can be easily operated.
Furthermore, by providing the annular recess 104, the number of times of bending of the peripheral portion of the can lid 101 can be increased, and the strength of the can lid 101 can be improved.

Further, since the annular recess is not formed in the flat portion 106, dust on the flat portion 106 can be easily removed, and it is hygienic.
Furthermore, since the tab 111 penetrates the notch 113 in the front-rear direction, the tab 111 can be prevented from rotating in the horizontal plane around the rivet 112. Therefore, when the tab 111 rotates around the rivet 112 and the rear end portion of the tab 111 is operated upward, the opening forming portion 110 cannot be favorably applied, and the opening forming portion 110 is excellent. It is possible to prevent such a situation that it cannot be opened.

Furthermore, since the bottom surface 113 </ b> A of the notch 113 is positioned above the upper surface of the flat portion 106, the beverage that has flowed out from the opening formed by the opening forming portion 110 onto the flat portion 106 has an annular protrusion from the notch 113. It is possible to prevent leakage to the outside of the portion 105.
In addition, since a constant space 23 is formed between the rear portion of the tab 111 and the annular recess 104, a finger is hooked from the outside of the notch 113 to the lower end of the rear end of the tab 111 via the space 23. Can do. Therefore, the opening portion 110 can be opened by easily operating the rear end portion of the tab 111 upward. At this time, with the can lid 101 attached to the opening edge, the flat surface portion 106 is located substantially in the same plane as the upper end of the bending attachment portion 103, so that the tab 111 is folded behind the rear end portion. The music attachment portion 103 is not positioned, and the rear end portion of the tab 111 can be easily operated.

Furthermore, since the flat portion 106 is smaller than the can lid 1 of the first embodiment, the strength of the flat portion 106 is further increased. Therefore, the flat portion 106 is less deformed by the pressure in the beverage can, and the flat portion 106 can be formed thinner, so that the manufacturing cost of the can lid 101 can be further reduced.
FIG. 13 is a perspective view showing a configuration of a can lid 301 according to the second embodiment.

  Referring to FIG. 13, a can lid 301 according to this embodiment is substantially circular in plan view, as in the first and second embodiments, and a single metal plate (for example, an aluminum plate) is pressed. By being processed, a bent attachment portion 303 formed on the outer peripheral edge portion of the can lid 301 and wound around the main body 302 of the beverage can, and an annular recess formed on the radially inner side of the bent attachment portion 303 304, an annular convex portion 305 formed on the radially inner side of the annular concave portion 304, and an opening forming portion 310 that is formed on the radial inner side of the annular convex portion 305 and that can be opened along the score line 309. A tab 311 for opening the opening forming portion 310 is formed into a curved shape having a flat portion 306 attached by a rivet 312.

  The feature of the can lid 301 according to this embodiment is that the radial thickness of the annular convex portion 305 is partially changed so that the radially inner surface of the annular convex portion 305 is the opening forming portion of the flat portion 306. 310 and the tab 311 are formed so as to be located on the right side, and the flat portion 306 is formed in a minimum size for arranging the opening forming portion 310 and the tab 311. An upper end surface of the annular convex portion 305 is formed by a flat surface 305, and a notch 313 is formed on the opposite side to the opening forming portion 310 with respect to the center of the flat surface portion 306 so as to be recessed downward. It is substantially U-shaped.

FIG. 14 is a perspective view showing a configuration of a can lid 401 according to the third embodiment.
Referring to FIG. 14, the can lid 401 according to this embodiment, like the second embodiment and the first contact, a generally circular in plan view, a metal plate (e.g., aluminum plate) is By being press-worked, it is formed at the outer peripheral edge of the can lid 401, and is folded around the beverage can main body 402, and a ring formed inside the bending attachment 403 in the radial direction. The concave portion 404, the annular convex portion 405 formed on the radially inner side of the annular concave portion 404, and the opening forming portion 410 that is formed on the radial inner side of the annular convex portion 405 and can be cut along the score line 409 and opened. And a tab 411 for opening the opening forming portion 410 is formed into a curved shape having a flat portion 406 attached by a rivet 412. A cutout 413 is formed in the annular convex portion 405 so as to be recessed downward from the upper end on the opposite side of the opening forming portion 410 with respect to the center of the flat surface portion 406.

  The beverage can according to this embodiment is provided with a cover 414 that is formed of, for example, resin and is tightened on the annular convex portion 405. The cover 414 includes a substantially cylindrical peripheral surface plate 415 that covers the outer peripheral surface of the annular convex portion 405, and an end surface plate 415 that closes one end surface of the peripheral surface plate 415. A screw thread 417 is formed on the inner peripheral surface of the peripheral plate 415, and a protrusion 418 (or a screw groove) having a shape corresponding to the screw thread 417 is formed on the outer peripheral surface of the annular convex portion 405. When the cover 414 is fastened to the annular convex portion 405, the screw thread 417 of the cover 414 engages with the protrusion 418 of the annular convex portion 405 and is firmly fixed, and the annular convex portion 405 is covered by the cover 414. It becomes. However, the engagement between the cover 414 and the annular protrusion 405 is not limited to the configuration achieved by the screw thread 417 and the protrusion 418 (or screw groove), and is formed on one of the cover 414 and the annular protrusion 405, for example. The structure which is achieved by the convex part made and the recessed part formed in the other may be sufficient.

When the above-described configuration is adopted for the conventional can lid 201 as shown in FIG. 15, it is necessary to provide an engaging portion such as a protrusion on the bending attachment portion 203, which is difficult. If the engaging portion such as the protrusion 418 is provided on the annular convex portion 405 as in this embodiment, the engaging portion can be easily formed.
The cover 414 (the end face plate 416 thereof) and the can lid 401 (the tab 411 thereof) are connected by a strap 419 having flexibility. One end of the strap 419 is coupled to the inner surface (surface on the peripheral surface plate 415 side) of the end surface plate 416 of the cover 414. At the other end of the strap 419, a mounting portion 412 formed by being folded back into a substantially arc shape is formed. A through hole 420 is formed in the rear end portion of the tab 411, and the strap 419 is attached by elastically deforming the attachment portion 412 so that the attachment portion 412 of the strap 419 is pressed against the rear end portion of the tab 411. The attachment portion 412 can be easily attached to the rear end portion of the tab 411 through the through hole 420 without providing a separate member. However, the shape of the other end portion of the strap 419 is not limited to the above shape, and other shapes that can be easily attached to the tab 411 can be adopted.

In this embodiment, since the annular convex part 405 which makes a mouth when drinking the drink in a drink can directly can be covered with the cover 414, it is clean. It is also possible to store the promotional items in the space in the annular convex portion 405 covered with the cover 414.
When attaching the cover 414 to the can lid 401, it is preferable that the lower end surface (the end surface opposite to the end surface plate 416) of the peripheral surface plate 415 of the cover 414 is in contact with the bottom surface of the annular recess 404. In this case, by attaching the cover 414 to the can lid 401, the inside of the annular convex portion 405 can be sealed watertight, so that the beverage does not spill even if the main body 402 is tilted with the opening forming portion 410 opened. Therefore, it is convenient to carry the beverage can after opening the opening forming portion 410, and it is possible to prevent dust and the like from entering the main body 402 from the opening, and the main body 402 contains carbonated drinks. In this case, it is possible to prevent the carbon dioxide gas from escaping.

  Further, since the cover 414 and the can lid 401 are connected by the strap 419, it is possible to prevent the cover 414 from being separated from the can lid 401 and lost. Further, when opening the opening forming portion 410 by operating the tab 411, the opening forming portion 410 can be easily opened by pulling the cover 414 connected to the tab 411 upward. Further, when the cover 414 is fastened to the can lid 401, the strap 419 is accommodated in the annular convex portion 405 and is not exposed to the outside. Can be prevented.

The present invention is not limited to the contents of the above embodiments, and various modifications can be made within the scope of the claims.
For example, the tabs 11, 11 </ b> B, and 11 </ b> C are not limited to the steion type, but are of a type that is released from the beverage can together with the opening forming portion 10 by opening the opening forming portion 10 and then pulling upward. There may be.

In addition, the beverage can lid of the present invention is not limited to a slim type beverage can, and can be applied to a beverage can whose outer diameter is larger than 52 mm, for example.

1 is a perspective view of a can lid according to an embodiment of the present invention and a beverage can of the present invention to which the can lid is applied. It is a top view of a beverage can. It is a rear view of a drink can. It is sectional drawing seen along arrow AA shown in FIG. It is a partial cross section for demonstrating the difference of the aspect with the conventional can lid in the case of attaching the can lid which concerns on this embodiment to a main body. It is a partial sectional view showing the state where a plurality of can lids were laminated. It is a perspective view which shows the structure of the can lid which concerns on a 1st modification. It is sectional drawing seen along the arrow BB shown in FIG. It is a perspective view which shows the structure of the can lid concerning a 2nd modification. It is a perspective view which shows the structure of the can lid which concerns on a 3rd modification. It is a top view which shows the structure of a can lid. It is sectional drawing seen along the arrow CC shown in FIG. It is a perspective view which shows the structure of the can lid concerning 2nd Embodiment. It is a perspective view which shows the structure of the can lid concerning 3rd Embodiment. It is a figure which shows the structure of the conventional drink can.

Explanation of symbols

1, 1A, 1B, 1C , 301 , 401 Can lid 2 , 302 , 402 Main body 3 , 303 , 403 Bending attachment part 4 , 304 , 404 Annular recess 41 Receiving part 5 , 305 , 405 Annular convex Part 6 , 3 06 , 406 plane part 7 , upper end opening 8 opening edge part 10 , 3 10 , 410 opening forming part 11, 11 B, 11 C , 3 11 , 411 tab 13, 13 A, 13 B, 13 C , 3 13 , 413 cut outs 131,131A, 131B, 131 C bottom 132, 132A, 132C, 132C inclined surface 14,16,19,2 second space

Claims (5)

A beverage can lid for closing an upper end opening of a substantially bottomed cylindrical beverage can body,
A fold for attaching the beverage can lid to the opening edge is formed on the outer peripheral edge of the beverage can lid, and is folded and overlapped with the opening edge that defines the upper end opening of the beverage can body. A song mounting part;
An annular recess that is formed on the radially inner side of the bent mounting portion and that is recessed below the upper end of the bent mounting portion in a state where the beverage can lid is mounted to the opening edge portion;
An annular convex portion that is formed on the radially inner side of the annular concave portion and projects above the upper end of the bending attachment portion in a state where the beverage can lid is attached to the opening edge portion;
It is formed on the inner side in the radial direction of the annular projection, and the beverage can lid is attached to the opening edge, and is located below the upper end of the annular projection, and the bent attachment portion A plane portion located substantially in the same plane as the upper end or above the upper end of the bent mounting portion;
An opening forming portion that is formed at a predetermined position near the periphery of the flat surface portion and can be opened by being cut by a force acting along a direction intersecting the flat surface portion;
In the annular convex portion, a notch formed to be recessed downward from the upper end in a portion located on the opposite side of the opening forming portion with respect to the center of the flat portion,
It is attached to the flat part in a state straddling the opening forming part and the notch, and the end part on the notch side is operated upward so that a force is applied to the opening forming part for opening. and an operation unit seen including,
The rear end portion on the notch side of the operation portion is disposed so as to face the bottom surface of the notch and not protrude radially outward from the annular convex portion,
The notch is formed with an abutting portion that abuts a predetermined position of the operation portion and forms a space for inserting a finger between the rear end portion of the operation portion and the notch. beverage can lid, characterized in that is. At the rear end portion of the operation portion, two rising pieces extending upward and a connecting piece connecting the upper ends of the two rising pieces are formed,
The contact portion is the bottom surface of the notch,
The beverage can lid according to claim 1 , wherein the lower ends of the rising pieces are in contact with the bottom surfaces of the notches . In the operation part, an operation convex part is formed by forming the width of the rear end part narrow,
The contact portion is the bottom surface of the notch,
A recess that is concavely curved downward is formed on the bottom surface of the notch, and the lower surface of the operation convex portion is in contact with the bottom surface of the notch, and the rear end portion thereof is located above the recess . The beverage can lid according to claim 1 or 2, characterized in that A cover that is tightened over the annular projection,
The beverage can lid according to any one of claims 1 to 3, further comprising a strap for connecting the cover and the operation unit . A beverage can comprising the beverage can lid according to any one of claims 1 to 4.

Images