JP5246858B2 - Easy-to-open can lid - Google Patents

Description

The present invention relates to an easy-to-open can lid that can be opened by pulling up one end side of a tab riveted to a panel portion of the can lid as a finger-hanging portion, particularly for a can lid such as a beverage can. Stein tub type opening for positive pressure cans to make it easier to hang the fingertip on the finger rest of the tab at the time of opening operation by forming a recess for finger insertion on the panel on the can lid periphery side from near the bottom of the section It relates to an easy can lid.

2. Description of the Related Art Conventionally, in a beverage can container, a portion of an opening surrounded by a score line on a panel portion of a can lid can be formed by pulling up one end of a tab riveted to the panel portion of the can lid as a finger hook portion. The easy-open can lid is an easy-to-open can lid that pushes inwardly and partially opens as part of the panel of the can lid without separating the tab or opening piece from the can lid. In such an easy-to-open can lid, in order to facilitate the finger-holding when pulling up the tab-fitting part of the tab with the fingertip, the area around the can-lid It is common practice to form finger recesses in the panel on the side (see, for example, Patent Documents 1 and 2 below).
JP 2002-59928 A JP 2006-176147 A

  By the way, in the easy-to-open can lid having the finger insertion recess as described above, as the finger insertion recess is deepened and the gap between the panel portion of the can lid and the finger holding portion of the tab is increased, the finger holding portion of the tab is increased. On the other hand, it is easier to hang your fingers, but on the other hand, if you have a finger insertion recess that is deep just under the tab's finger rest, when the can lids are stacked together, the top of the tab's finger rest and the finger insertion recess If the bottom surface of the can comes into contact with each other, the stackability of the can lid deteriorates, and when a large number of can lids are continuously supplied, there is a possibility that troubles of cutting out the can lid may occur. is there.

An object of the present invention is to solve the above-described problems. Specifically, the present invention is for a positive pressure can in which a finger insertion recess is formed in a can lid panel portion with respect to a finger hooking portion of a tab. It is an object of the present invention to improve the finger-holding property of the tab-type easy- to- open can lid without deteriorating the stacking property of the can-lids.

In the present invention, in order to solve the above-described problems, a tab for opening operation is fixed at the center of the panel portion of the can lid on which score lines for partitioning the opening piece are engraved by the rivet portion. A finger insertion recess is formed in the panel portion on the side of the can lid from the lower side of the finger hook portion on one end side of the tab away from the rivet portion, and the fingertip portion of the tab is inserted into the finger insertion recess portion of the panel portion. For positive pressure cans that can be opened by pulling up, the easy opening of a steion tab type can lid, the panel part is directly below the tab hooking part of the tab, and the reinforcing recessed part is shallower than the fingering recessed part The reinforcing recess is continuously provided at the peripheral portion of the finger insertion recess having a bottom surface and an inclined surface, and the edge of the reinforcement recess serving as a boundary with the finger insertion recess is the outer end of the finger hooking portion of the tab of located below and in the vicinity Rutotomoni, the upper surface of the tab , A range that overlaps with at least a reinforcing recess in a plan view, recessed below the tab top surface other than the range has a low upper surface portion is formed, when a stack of single ends of the can lid, low upper surface of the tab parts and the reinforcing recess does not abut, and, is characterized in Rukoto the inclined surface of the outer end and the finger holding cavity of finger hook tabs are configured so as not to abut.

  According to the easy-to-open can lid of the present invention as described above, a reinforcing concave portion is formed in the can lid panel portion immediately below the finger-hook portion of the tab, and the rigidity of this portion is increased, so that beer and carbonated beverages can be obtained. When the central part of the can lid bulges and deforms upward (outside the container) due to the internal pressure of the container (positive pressure) increased by the contents such as The bulging deformation of the can lid is suppressed at the recessed portion. As a result, a large gap can be secured between the tab by the finger hooking portion of the tab that is displaced upward along with the bulge of the center portion of the can lid and the reinforcing concave portion in which the displacement is suppressed immediately below the tab lid. Can be improved.

In addition, the reinforcing recess formed in the can lid panel portion directly below the finger-holding portion of the tab is shallower than the finger insertion recess, and on the upper surface of the tab at least over the reinforcing recess in plan view. Since the lower upper surface portion that is recessed downward from the upper surface of the tab outside the range is formed in the wrapping range, when the single can lids are stacked, the lower upper surface portion of the tab hooking portion and the finger the shallow reinforcing recess depths than recess placed, it is possible to suppress the contact by both stacking Rutotomoni, the edge of the reinforcing recess at the boundary between the finger insertion recess, the finger rest of the tab outer ends of It is located in the vicinity of the bottom, and it is configured so that the outer end of the finger hooking portion of the tab does not contact the inclined surface of the finger receiving recess, so that the stackability (stackability) of the can lid can be maintained well. be able to.

For positive pressure cans that have a finger insertion recess in the can lid panel with respect to the tab's finger rest, and for the easy opening of the steion tab method , the tab finger rest of the tab does not deteriorate. As shown in the following examples as the best mode, the panel portion has a depth that is directly below the finger hook portion of the tab and shallower than the finger insertion recess. A reinforcing recess is formed at the peripheral portion of the finger insertion recess having a bottom surface and an inclined surface, and the edge of the reinforcement recess serving as a boundary with the finger insertion recess is connected to the outer edge of the finger hooking portion of the tab of Rutotomoni is positioned below and in the vicinity, the upper surface of the tab, in a range that overlaps with at least a reinforcing recess in plan view, forming a low top portion which is recessed below the tab top surface other than the range, the can lid The bottom surface of the tab when the single unit is stacked And reinforcing recess does not abut, and the inclined surface of the outer end and the finger holding cavity finger placing portion of the tab is configured not to abut, it is realized by that.

The easy-to-open can lid of the present embodiment is a steion tab type easy-to-open can lid used for a beverage can container containing beer, carbonated beverage, or the like, as shown in FIG. In the can lid 1 manufactured from a thin metal plate or the like, the panel portion 2, the counter sink portion (annular groove and chuck wall) 3, and the flange portion 4 are integrally pressed with the main body portion. A tab 6 for opening operation formed separately is fixed by riveting at a rivet portion 5 integrally formed at substantially the center of the substantially disc-shaped panel portion 2.

  The substantially disc-shaped panel portion 2 of the can lid 1 has a breakable score line 7 (in addition to the outer main score line 7 that breaks when opened, the inner sub-score line that does not break is a double line. Is partly engraved so as to be close to the rivet portion 5, and the region surrounded by the score line 7 (the main score line that breaks when opened) It is a part of the opening piece 8 pushed down inside, and the part between the both ends of the score line 7 becomes a hinge part which connects the panel part 2 and the opening piece 8 at the time of opening. In addition, a reinforcing projection 8a is formed on the portion that becomes the opening piece 8 in order to increase the rigidity of the portion.

  With respect to the opening piece 8 of the panel part 2 surrounded by the score line 7, the opening operation tab 6 has a rivet in a state in which a ring hole is provided between the rivet part 5 at one end side thereof as a finger hook part 6a. Outside the area of the opening piece 8 and at the approximate center of the panel part 2 so that the other end side is located above the opening piece 8 as a push-down part 6b. The formed rivet part 5 is fixed to the panel part 2 by riveting.

  In the tab 6, the metal plate is bent to the lower surface side at the entire outer peripheral edge (including the outer end of the finger hanging part 6a) and the inner peripheral edge of the ring hole (including the inner end of the finger hanging part 6a). In contrast to the extremely high rigidity, in the vicinity of the portion riveted by the rivet portion 5, it is easy to deform with only one metal plate. Further, the thickness of the finger-hanging portion 6a of the tab 6 where the metal plate is bent is thinner than the thickness of the other outer peripheral portion of the tab 6 where the metal plate is bent, so that a gap is formed between the tab 6 and the panel surface. The finger grip is improved.

  The panel portion 2 is formed with a center panel portion 9 that is slightly recessed from the other portions of the panel portion 2 as a part thereof so as to include the region of the tab 6 and the opening piece 8 of the panel portion 2. Accordingly, the degree of protrusion of the tab 6 on the upper surface of the can lid is suppressed to a low level, and the overall rigidity of the panel portion 2 is increased.

  In addition, about this center panel part 9, in a present Example, out of the outline which shows the periphery (inclined surface) of the center panel part 9, the outline of the tab 6 near the finger-hanging part 6a extends toward the can lid peripheral side. In such a plan view, it is formed in a substantially fan shape, and the opening angle of both side edges of this substantially fan shape is set in the range of 15 to 50 ° (specifically, 22 °).

  Further, the center panel portion 9 which is a part of the panel portion 2 is formed with a finger insertion recess 10 for facilitating the gripping of the finger hanging portion 6a from the vicinity of the lower side of the finger hanging portion 6a of the tab 6 to the periphery of the can lid. The finger insertion recess 10 is formed so as to be recessed further downward than the center panel portion 9 in a state of being connected to a part of the inclined surface which is the peripheral portion of the center panel portion 9.

  By the way, in the can lid 1 of the present embodiment in which the finger insertion recess 10 is formed in the panel portion 2 (the center panel portion 9) as described above, the panel portion 2 (the center panel portion 9) is further provided with a tab. A reinforcement recess 11 having a depth smaller than that of the finger insertion recess 10 is formed immediately below the finger hooking portion 6a. On the other hand, the upper surface of the tab 6 is at least reinforced when the can lids 1 are stacked together. A low upper surface portion 6c that is recessed below the upper surface of the tab outside the range is formed in a range overlapping the concave portion 11 in plan view.

  The reinforcing concave portion 11 located immediately below the finger hooking portion 6a of the tab 6 is connected to the peripheral portion of the finger insertion concave portion 10, and the edge of the reinforcing concave portion 11 serving as a boundary with the finger insertion concave portion 10 is the tab finger hanging portion. Specifically, the inner peripheral edge of the finger insertion recess 10 (the peripheral edge on the can lid center side that is the boundary with the reinforcing recess 11) and the outer end of the tab finger hooking part 6a Are positioned so as to slightly overlap in plan view.

  Each of the finger insertion recess 10 and the reinforcement recess 11 has a bottom surface substantially parallel to the panel surface of the panel portion 2 and an inclined surface surrounding the bottom surface, but surrounds the bottom surface of the finger insertion recess 10. Of the inclined surfaces, the inclined surface near the lower portion of the tab finger hanging portion 6a is connected to the reinforcing recess 11, while the other inclined surfaces are connected to the center panel portion 9 and are connected to the reinforcing recess. In the vicinity of the height of 11, it is formed on a plurality of inclined surfaces having different inclination angles so that the inclination of the lower stage is gentler than that of the upper stage.

  In the can lid 1 of the present embodiment in which the finger insertion concave portion 10 and the reinforcing concave portion 11 are formed as described above and the low upper surface portion 6 c is formed on the tab 6, when the single can lids are stacked together, The depth is set to a depth that does not contact the lower upper surface portion 6c of the tab 6 of the can lid 1 stacked on the lower side, and the depth of the finger insertion recess 10 is stacked on the lower side. It is set to a depth that is positioned below the lower upper surface portion 6 c of the tab 6 of the can lid 1, and the outer end of the finger hook portion 6 a of the tab 6 is an inclined surface of the finger insertion recess 10 that follows the reinforcing recess 11. It is arrange | positioned in the position which does not contact.

  The distance relationship (depth) in the vertical direction of the finger insertion recess 10, the reinforcing recess 11, and the lower upper surface portion 6 c of the tab 6 according to this embodiment will be specifically described. From the panel surface (bottom surface) to the bottom surface of the reinforcing recess 11 is set within a range of 0.2 to 0.5 mm (specifically 0.4 mm), and finger insertion from the panel surface (bottom surface) of the center panel portion 9 The range from 0.6 to 1.1 mm (specifically 1 mm) is set up to the bottom surface of the recess 10, and 1.1 to 1.6 mm from the panel surface of the panel portion 2 to the bottom surface of the finger insertion recess 10. (Specifically, 1.4 mm), the distance from the lower surface of the finger hooking portion 6a of the tab 6 to the bottom surface of the reinforcing recess 11 is set to 0.8 to 1.2 mm (specifically 1 mm), The range from 0.1 to 0.3 mm from the upper surface of the tab 6 to the lower upper surface portion 6c. Specifically set to 0.2 mm).

  Further, the distance relationship in the horizontal direction, that is, the vertical width (the length in the direction of the central axis of the tab 6) and the horizontal width (the length in the direction perpendicular to the direction of the central axis of the tab 6) will be specifically described. About the recessed part 10, the lateral width is formed larger than the lateral width of the tab 6, Preferably, it is the range of 17-25 mm (specifically 21 mm) so that the outer peripheral part of the panel part 2 can fully be reinforced. The size of the bottom surface of the finger insertion recess 10 is set so that the vertical width is 1.9 mm and the horizontal width is 9.1 mm.

  The reinforcing recess 11 located immediately below the finger hooking portion 6a of the tab 6 has a horizontal width that is approximately the same as the horizontal width of the tab 6, and the vertical width is the outer end of the tab finger hanging portion 6a (the periphery of the can lid). Side length) from the vicinity to the inner end (the peripheral edge on the can lid center side), and the length is preferably from 1.5 to 1.5 so that a sufficient reinforcing effect can be obtained. The range is set to 5 mm (specifically, 2.5 mm).

  At least the lower upper surface portion 6c of the tab 6 provided so as to overlap with the reinforcing recess 11 in a plan view has a vertical width of 2 to 7 mm from the outer end of the finger hook portion 6a of the tab 6 toward the center of the can lid. Specifically, the vertical width is preferably 5 mm so that the stackability of the can lid can be secured without causing the warp of the tab 6 near the finger-hanging portion 6a. As shown in FIG. 5, the tab 6 is continuously provided from the outer end of the finger-hanging portion 6a to the vicinity of the middle portion of the ring hole of the tab 6.

  According to the easy opening lid of the present embodiment as described above, the reinforcing recess 11 is formed in the panel portion 2 (the center panel portion 9) immediately below the finger-hanging portion 6a of the tab 6, and the rigidity of this portion is increased. Therefore, the central part of the can lid 1 bulges and deforms in a dome shape upward (outside the container) due to the internal pressure (positive pressure) of the container that is increased by the contents of beer, carbonated beverages, and the like. At this time, the bulging deformation of the can lid is suppressed at the portion of the reinforcing recess 11 located immediately below the finger-hanging portion 6 a of the tab 6. As a result, it is possible to secure a large gap between the two by the finger-hanging portion 6a of the tab 6 that is displaced upward as the center portion of the can lid 1 bulges and the reinforcing concave portion 11 in which the displacement is suppressed immediately below. It is possible to improve the finger holdability of the tab 6.

  The reinforcing recess 11 located immediately below the finger-hanging portion 6a of the tab 6 is shallower than the finger insertion recess 10, and on the other hand, the upper surface of the tab 6 is at least over the reinforcing recess 11 in plan view. Since the lower upper surface portion 6c that is recessed downward from the upper surface of the tab other than that range is formed in the wrapping range, when the single pieces of the can lids 1 are stacked, the lower upper surface of the finger hanging portion 6a of the tab 6 By the portion 6c and the reinforcing recess 11 having a depth smaller than that of the finger insertion recess 10, contact between the two can be suppressed, and the stackability (stackability) of the can lid 1 can be maintained well. it can.

  Further, in the can lid 1 of the present embodiment, the reinforcing recess 11 is continuously provided at the peripheral portion of the finger insertion recess 10, and the edge of the reinforcement recess 11 serving as a boundary with the finger insertion recess 10 is the finger hook of the tab 5. Because of being positioned near the lower end of the outer end of the portion 6a, when the fingertip is put into the finger insertion recess 10 and the finger is hooked on the finger hooking portion 6a of the tab 6, there is a gap directly below the finger hooking portion 6a by the reinforcing recess 11 Therefore, it is easy to put a finger on the tab 6 due to this gap, and the edge of the reinforcing recess 11 is located near the lower end of the outer end of the finger hook 6a. When they are stacked, the finger-hanging portion 6a of the tab 5 and the finger insertion recess 10 do not come into contact with each other and the stackability is not impaired.

  Furthermore, in the can lid 1 of the present embodiment, a range including at least the tab 6 and the finger insertion recess 10 in the panel portion 2 is formed in the center panel portion 9 that is recessed from the other portions of the panel portion 2. In the outline indicating the peripheral edge of the center panel portion 9, the outline in the vicinity of the finger-hanging portion 6a of the tab 6 is formed in a substantially fan shape in plan view so as to expand toward the periphery of the can lid. The lateral width of the finger insertion recess 10 can be ensured to be large along the outer peripheral edge of the panel portion 2, and the rigidity (strength against bulging deformation) of the panel portion 2 can be improved at this portion.

  At the same time, the width of the contour of the center panel portion 9 is narrowed from the finger insertion recess 10 toward the center of the can lid. The panel portion 2 can be reinforced up to the vicinity of the finger rest portion 6a, and the panel portion 2 can be further reinforced in the vicinity of the reinforcing recess 11, so that the central portion of the can lid 1 bulges due to the container internal pressure. When deforming, since the bulging deformation in the vicinity of the reinforcing recess 11 located immediately below the finger hooking portion 6a of the tab 6 can be more effectively suppressed, the finger catching property of the tab 6 is further effectively improved. Can be made.

The top view which shows the whole can lid | cover about one Example of the easy opening can lid | cover of this invention. Sectional drawing along the can lid radial direction which expands and shows the finger-hanging part of a tab, a finger insertion recessed part, and the vicinity of a reinforcement recessed part about the easy opening can lid shown in FIG.

Explanation of symbols

1 Can lid (easy opening can lid)
2 Panel portion 5 Rivet portion 6 Tab 6a Finger hook portion 6c Low upper surface portion 7 Score line 8 Opening piece 9 Center panel portion 10 Finger insertion recess 11 Reinforcing recess

Claims (2)

A tab for opening operation is fixed at the center of the panel part of the can lid where the score line for partitioning the opening piece is engraved, with the rivet part on the finger hook part on one end side of the tab away from the rivet part. For a positive pressure can where a finger insertion recess is formed in the panel portion from the lower side to the periphery of the can lid, and a fingertip is inserted into the finger insertion recess of the panel portion to raise the finger hooking portion of the tab. In the easy opening can lid of the steion tab method , the panel portion has a reinforcing recess shallower than the finger insertion recess formed immediately below the finger hooking portion of the tab , and has a bottom surface and an inclined surface. and reinforcing recessed peripheral portion of the recess is continuously provided, the edge of the reinforcing recess at the boundary between the finger insertion recesses, Rutotomoni located below and in the vicinity of the outer end of the finger placing portion of the tab, on the upper surface of the tab , At least the reinforcement recess and the overlap in plan view The range of its recessed below the tab top surface other than the range has a low upper surface portion is formed, when a stack of single ends of the can lid, and a reinforcing recesses and lower top surface portion of the tab does not abut and, opening, characterized in Rukoto the inclined surface of the outer end and the finger holding cavity of finger hook tabs are configured so as not to abut easily can lid. The range including at least the tab and the finger insertion concave portion in the panel portion is formed in the center panel portion that is recessed more than the other portions of the panel portion, and the tabs out of the contours indicating the peripheral edge of the center panel portion. 2. The easy-to-open can lid according to claim 1 , wherein the contour of the vicinity of the finger-hanging portion is formed in a substantially fan shape in plan view so as to expand toward the periphery of the can lid.

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