JP2008213934A - Can lid having improved unsealability and drinking property - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a can lid which is easily opened by reducing an external force required for the opening to stably provide a content to the outside. <P>SOLUTION: This can lid 1 which includes: a main body 10 having an unsealing planned section 30; and a tab 50 is constituted. The tab 50 is connected with the main body by a rivet 70, one end of which works as a gripping section 51, and the other end of which works as a pressurizing section 52 for applying a pressure to the unsealing planned section. The can lid 1 has a central score 31, a first boundary score 32, and a second boundary score 33. The central score 31 is formed to be extended in the same direction as the extending direction of the tab at the center of the unsealing planned section 30. The first boundary score 32 is formed to be laterally symmetrically extended at one end of the central score. The second boundary score 33 has: an extended section 33c for drinking; and an expanded-extended section 33d, and divides and defines the unsealing planned section from the top surface of the main body together with the first boundary score. The extended section 33c for drinking is formed to be laterally symmetrically extended at the other end of the central score. The expanded-extended section 33d is formed to be extended downward to a vicinity of the end section of the first boundary score. At least the region between the first boundary score and the second boundary score works as a stay section 35. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a can lid provided with a score breaking tab, and in particular, by improving a score or the like that partitions the can lid to form a planned opening portion, the can can be improved in opening and drinking. It concerns the lid.

  FIG. 1A is a perspective view showing a conventional metal can, and FIG. 1B is a plan view showing a can lid having the score breaking tab of FIG. 1A.

  The conventional aluminum or steel can lid 100 developed for easy opening is opened by a substantially circular continuous score 310 in which a predetermined portion of the upper surface of the can lid is pre-engraved. An opening means such as a stab-on-tab 500, which is partitioned into a scheduled portion 300 and pressurizes the planned opening portion 300 from above, is the opening schedule on the upper surface of the lid body 100. This is a push-open type can lid 100 in which a rivet 700 is fastened adjacent to the portion 300. The peripheral edge of the can lid 100 is mechanically engaged with and coupled to the end of the can body 200.

  On the other hand, the conventional can is comprised by the pressure | voltage resistant can and the pressure reduction can. Therefore, in the push-open type can lid used in this can, the soft portion of the can lid (structurally compared to other parts) due to the water hammer phenomenon that the contents spout from the inside of the can and push the can lid In order to prevent the score constituting the low pressure resistant part) from being unintentionally broken and suddenly opened, a score greater than a predetermined thickness so that it can stably withstand pressure changes inside and outside the can Processing is required. Therefore, when the score is physically broken for opening the can, an external force of a predetermined magnitude or more is required, and this external force becomes dependent on the force transmitted by the pressing portion of the tab. .

  That is, in order to open the conventional can lid 100, one end of the tab 500 that functions as the gripping portion 510 is lifted upward. Then, the other end of the tab 500, that is, the pressurizing part 520 pressurizes the center of the opening-scheduled part 300 by the lever principle, and at the same time, the main body part to which the rivet 700 is fastened is relatively lifted. As a result, the break starts at a score 310 near the rivet 700 and propagates along the remaining score 310 in the circumferential direction. When the gripping portion 510 of the tab 500 is sufficiently lifted, the opening portion 300 is further lowered into the can, and the break propagated clockwise along the ring-shaped score 310 reaches the end of the score 300. . Then, the breakage is stopped by the stay portion 350 which is a score unprocessed region, and the opening is completed. The opened unscheduled portion 300 is located inside the can in a state of being inclined obliquely downward and biased toward the stay portion 350 (see FIG. 1A).

  However, in the conventional can lid 100 as described above, since the score 310 has a substantially ring shape around the opening planned portion 300, the score 310 is transmitted from the pressing portion 520 of the tab 500 to the center of the opening planned portion 300. Since a part of the external force is dispersed, the force does not concentrate on the part where the break of the score 310 is started, and a lot of external force is required at the start of the break. Furthermore, an even greater external force is required to transmit the breakage. Therefore, it is still difficult to open the can lid 100 for an elderly person, a child, a patient, or the like having a weak force. In addition, when an excessive force more than necessary is applied, damage to the tab 500 member or the connecting rivet 700 is induced, and there is a problem in that it has to be opened using a separate tool such as a cutter machine.

  Furthermore, after opening the can lid, as shown in FIG. 1C, the opening-scheduled portion 300 is biased to one side of the opening and is maintained in a downwardly inclined state inside the can. In the process of pulling out or pulling out, the unscheduled opening portion 300 obstructs the flow of the contents, and the contents flow in an unexpected direction or overflow unintentionally.

  Therefore, the present invention has been made in view of the above problems, and the object of the present invention is to reduce the external force required for opening and easily open the flow of the contents of the can after opening. It is an object of the present invention to provide a new and improved can lid that can stably provide its contents to the outside without disturbing the above.

  In order to solve the above-described problem, according to one aspect of the present invention, a predetermined region on the upper surface is coupled to a main body partitioned into a portion to be opened by a score, the main body and the rivet, and one end of the gripping portion with the rivet as a center And the other end of the opposite side is a tab that acts as a pressurizing part for applying pressure to the planned opening part, and the center of the planned opening part is the extension direction of the tab. A central score extending in the same direction is provided, and one end located on the rivet side of the central score is provided with a first boundary score extending symmetrically continuously from the central score, and the rivet of the central score is provided. The other end located on the opposite side is formed with a drinking extension that extends continuously symmetrically from the central score, and both ends extend downward to near the end of the first boundary score. By forming the extension, a second boundary score is provided that divides and divides the planned opening portion from the upper surface of the main body together with the first boundary score, and at least a region between the first boundary score and the second boundary score is provided. A can lid is provided which acts as a stay portion.

  The central score may be formed in a linear shape.

  Further, the extended extension part of the second boundary score may be linear. According to this configuration, after the opening operation is completed, the unscheduled opening portion is not separated from the upper surface of the can lid main body by the extension extension portion, and is maintained in a bent state inside the can. It can play a role of guiding the contents to be extracted.

  Further, the extended extension part of the second boundary score may have a curved shape. According to this configuration, after the opening operation is completed, the opening-scheduled portion is completely separated from the upper surface of the can lid main body by the extension extension portion, so that the size of the opening can be expanded.

  Moreover, the length of the drinking extension part of the second boundary score may be longer than the lateral extension length of the first boundary score. According to this configuration, the amount of content drawn increases after the opening operation is completed.

  The length of the drinking extension portion of the second boundary score may be shorter than the lateral extension length of the first boundary score. According to this configuration, after the opening operation is completed, the amount of content to be drawn is reduced.

  The stay portion between the first boundary score and the second boundary score may be formed in an intermediate region of the opening scheduled portion. According to this configuration, the force required for the opening operation can be reduced, and at the same time, the opening can be performed quickly.

  Moreover, the embossed uneven | corrugated | grooved part may be formed in the scheduled opening part adjacent to the point which the pressurization part of a tab contacts, without disturbing the fracture | rupture path | route of a center score. According to this configuration, the opening pressure from the pressurizing portion of the tab is effectively transmitted by reinforcing the rigidity of the planned opening portion during the opening process and preventing the deformation.

  As described above, according to the present invention, the external force necessary for opening can be reduced and opening can be easily performed, and the contents can be stably provided to the outside after the opening without obstructing the flow of the contents of the can. Therefore, convenience in use can be improved.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

<One Embodiment>
FIG. 2 is a plan view showing a can lid 1 according to an embodiment of the present invention.
As shown in FIG. 2, the can lid 1 includes a substantially plate-shaped main body 10 and a tab 50 fixed to the central portion of the main body 10. In the drawing, the tab 50 is indicated by a dotted line. Hereinafter, the extension direction (longitudinal direction) of the tab 50 in the plane of the can lid 1 is referred to as “longitudinal direction”, and the direction perpendicular thereto is referred to as “lateral direction”.

  A predetermined area of the main body 10 is divided and partitioned as a scheduled opening portion 30 by scores 31, 32, 33 from other areas on the upper surface of the can lid. This unscheduled opening part 30 is a part where the upper surface of the can lid is scheduled to be opened. And the concave bottom part 20 engraved in the shape of an ellipse around the planned opening part 30 and the area where the tab 50 is installed accommodates the tab 50 and at the same time gives the body 10 rigidity in the opening process.

  The tab 50 is fixed to the main body 10 by a rivet 70. Then, in the opening process, one end of the tab 50 functions as a grip 51 for the user to grip with the rivet 70 as a reference, and the other end of the tab 50 presses the center of the scheduled opening 30. It functions as the pressurizing part 52. In this case, when the end of the pressurizing unit 52 is extended from the rivet 70 so as to press the point of about 2/5 to 3/5 with reference to the length in the longitudinal direction of the planned opening portion 30, This is advantageous because the required external force can be reduced. On the upper surface of the concave bottom portion 20 where the grip portion 51 of the tab 50 is located, a plurality of spacing protrusions 21 are formed to support the grip portion 51 and form a separation space between the grip portion 51 and the concave bottom portion 20. The

  The configuration of the present embodiment is characterized in that the processing of the scores 31, 32, and 33 provided to the scheduled opening portion 30 is improved in order to minimize the loss of external force required for opening. These scores 31, 32, and 33 are cuts that divide the planned opening portion 30 from other regions of the main body 10 and are planned to be broken or bent during the opening process, as will be described later. It is a kind of indentation that is pressure-molded.

  First, a central score 31 is provided at the center of the planned opening portion 30 so as to extend along the vertical direction. The center score 31 starts at one end 31 a near the rivet 70 and ends at the other end 31 b adjacent to the concave bottom portion 20. The shape of the central score 31 is preferably formed in a linear shape as shown in FIG. 2 so that breakage can be easily developed in the opening process.

  A first boundary score 32 is provided at one end 31 a located on the rivet 70 side of the central score 31 and is formed to extend laterally symmetrically from the central score 31. The first boundary score 32 constitutes a part of the periphery of the planned opening portion 30 (a part of the periphery), and at the same time acts as an opening start site by lifting the upper surface of the main body 10 around the rivet 70 during the opening process. .

  The first boundary score 32 is preferably formed in a slow curved shape along the periphery of the rivet 70 in the vicinity of the node 31 a that intersects the central score 31. In other words, the first boundary score 32 in the vicinity of the node 31 a is preferably formed in a curve protruding to the opposite side of the rivet 70 (for example, a substantially arc shape with the rivet 70 as the center). Accordingly, when the upper surface of the main body 10 around the rivet 70 is lifted during the opening process, the tensile force necessary for the breakage is effectively transmitted to the first boundary score 32, so that the breakage is easily started. .

  In the present embodiment, the end portion 32a of the first boundary score 32 is extended in a substantially horizontal (lateral direction) and is terminated, and a processing buffer score 34 (to be described later) is placed inside the first boundary score 32 at each end portion 32a. It is formed extending along the line.

  On the other hand, the second boundary score 33 is provided to the other end 31 b located on the opposite side of the rivet 70 of the center score 31. The second boundary score 33 includes a drinking extension portion 33c that is continuously and symmetrically extended from the central score 31, and both ends 33a downward (near the end portion 32a of the first boundary score 32). An extension extension portion 33d formed to extend in the direction of the first boundary score 32 in the longitudinal direction of the tab 50 in the plane. The second boundary score 33, together with the first boundary score 32, divides and partitions the scheduled opening portion 30 from other regions on the upper surface of the main body 10.

  Between the end portion 32a of the first boundary score 32 and the end portion 33a of the second boundary score 33, a stay portion 35 that is a score unprocessed region is provided. Even after the opening of the can lid 1 is completed, the stay portion 35 connects the can lid 1 and the planned opening portion 30, and the planned opening portion 30 separated from the upper surface of the can lid 1 is inside the can. To prevent falling off.

  The drinking extension 33c is a part that forms a user's drinking mouth, and extends in the lateral direction in a gentle streamlined manner substantially matching the peripheral shape of the ring-shaped can lid body 10 in the same manner as the concave bottom portion 20. It is formed. The citation extension 33 c is configured such that its center intersects the node 31 b of the central score 31. As shown in FIG. 2, the drinking extension 33 c of the second boundary score 33 and the lateral extension length of the first boundary score 32 may be configured substantially the same.

In the present embodiment, the extension extension portion 33d is a portion that is extended by extending the second boundary score 33, and is formed in a linear shape and has a form that is rapidly extended downward from the drinking extension portion 33c. In such a linear expansion extension 33d, angle and extension direction D _33d is extending direction D _33c and the extended extension portion 33d of the drinking line portion 33c theta increases in fracture process, the extension direction of the drinking line portion 33c The progress of the break that proceeds along D _33c is limited. Therefore, in such a linear extension extension portion 33d, even when the gripping portion 51 of the tab 50 is sufficiently lifted during the unsealing process and the pressurization portion 52 descends to the maximum inside the can, the extension extension portion 33d is maintained in a bent state without being broken. In this embodiment, since the length of the drinking extension 33c of the second boundary score 33 and the lateral extension of the first boundary score 32 are substantially the same, the linear center score 31 and the second boundary score 33 are expanded. The extension 33d is substantially parallel to the extension 33d.

  On the other hand, a processing buffer score 34 formed in parallel with these is provided inside the first boundary score 32, both right and left sides of the central score 31, and inside the second boundary score 33. The processing buffer score 34 starts from the end 32 a of the first boundary score 32, extends side by side along the first boundary score 32, the center score 31, and the second boundary score 33, and ends of the second boundary score 32. Provided in the form terminated at 33a. This processing buffer score 34 absorbs or minimizes the amount of movement of the material constituting the main body 10 of the can lid 1 when grooving the first boundary score 32, the center score 31, and the second boundary score 33. This prevents sudden changes in texture and shape. Further, since the processing buffer score 34 is not scheduled to be broken or bent in the opening process, it is preferable that the processing depth is shallower than the first boundary score 32, the center score 31, and the second boundary score 33.

Next, with reference to FIG. 3A, the opening process of the can lid 1 configured as described above will be described.
When the holding part 51 of the tab 50 is lifted to lower the pressurization part 52 to open the can, the pressurization part 52 pressurizes the center of the planned opening part 30, and at the same time, the can lid adjacent to the rivet 70 A part of the upper surface of the main body 10 is raised, and a tensile force substantially perpendicular to the first boundary score 32 is applied. When the tensile force exceeds a predetermined limit value, the fracture starts near the connection node 31a between the first boundary score 32 and the center score 31 (see (a) of FIG. 3A). Subsequently, when the pressurizing part 52 is further lowered by the raising of the grip part 51, the fracture is developed along the central score 31, and then the drinking extension part via the node 31 b located on the opposite side of the rivet 70 of the central score 31. It proceeds in the lateral direction along 33c (see (b) of FIG. 3A).

  Due to this breakage, the opening portion 30 is separated into two pieces 33 a and 33 b symmetrically with respect to the central score 31. At the final stage of the opening process, the tab 50 is aligned substantially perpendicularly to the upper surface of the can lid 1, so that the linear extension extension 33 d is bent and separated from the center score 31. The two pieces 33a and 33b of the portion 30 are pushed to the inside of the can by the side end of the pressurizing portion 52 of the tab 50 (see (c) of FIG. 3A). The two pieces 33a and 33b of the opening scheduled portion 30 bent in this way take a role of a side wall in the process of drinking or drawing out the contents, and guide the contents to flow smoothly to the center of the opening ( (See FIG. 3B).

  Although one embodiment of the present invention has been described above, the scope of the present invention is not limited to the above-described embodiment, and various other embodiments are within the scope of the essence and characteristic configuration of the present invention. And modifications are possible.

<Other embodiments>
Therefore, other embodiments will be described below with reference to FIGS.
As another embodiment, for example, as shown in FIG. 4, the shape of the central score 31 is configured in a curved shape in consideration of an aesthetic appearance before and after the fracture of the planned opening portion 30 in addition to a linear shape. You can also However, also in this case, it is preferable that the curvature radius of the curve is appropriately adjusted within a range that does not disturb the development of the fracture.

As another embodiment, for example, as shown in FIG. 5, the shape of the extended extension 33d of the second boundary score 33 may be a curved shape instead of the linear shape shown in FIG. When the extension extension 33d ′ is formed in a curved shape as shown in FIG. 5, the angle θ ′ formed by the extension direction D _33c of the drinking extension 33c and the extension direction D 33d ′ of the extension extension _33d ′ is reduced. Then, the break that has progressed along the extension direction D _33c of the drinking extension 33c is provided between the first boundary score 32 and the second boundary score 33 after being completely performed to the extension extension 33d ′. Stop at the stay section 35. When the opening is completed, the first boundary score 32 and the second boundary score 33 except for the vicinity of the stay portion 35 are completely broken, and the two pieces 33a and 33b of the planned opening portion 30 are separated from the rivet 70 side. It is supported by the stay part 35 in a biased state and bends inside the can. As a result, the flow of the fluid drawn through the opening is not restricted, and the content drawing speed can be further increased.

  As still another embodiment, for example, as shown in FIGS. 6A and 6B, the lateral extension length of the drinking extension 33c of the first boundary score 32 and / or the second boundary score 33 is set to a desired value of the contents. It can be adjusted appropriately according to the drawing speed. That is, as shown to FIG. 6A, when making the extension length of the drinking extension part 33c larger than the horizontal direction extension length of the 1st boundary score 32, the extraction amount and extraction speed | rate of the content after opening can be increased. Also, as shown in FIG. 6B, when the extension length of the drinking extension portion 33c is made smaller than the lateral extension length of the first boundary score 32, the amount of content drawn after opening can be reduced. Suitable for patients etc. to drink.

  As still another embodiment, for example, as shown in FIG. 7, the stay portion 35 can be formed in an intermediate region of the scheduled opening portion 30. In this case, as shown in FIG. 7, the first boundary score 32 includes a first boundary extended upward toward the ends 33 a and 33 a of the second boundary score 33 in addition to the laterally extending portion 32 c. An extension extension 32d having a score 32 is additionally provided. The time required for opening in the embodiment shown in FIG. 2 is relatively long depending entirely on the time required for the breakage progress at the second boundary score 33, but this implementation shown in FIG. If the length of the extended extension portion 33d of the second boundary score 33 is relatively shortened as in the form, the time required for the progress of the breakage is also shortened. In this case, the shape of the extension extension part 32d of the first boundary score 32 and the presence or absence of breakage are controlled in the same manner as the extension extension part 33d of the second boundary score 33 shown in FIG.

  As still another embodiment, for example, as shown in FIG. 8, in order to easily cause breakage or deformation of the scores 31, 32, 33 in the opening process, the external force is lost through the pressurizing portion 52 of the tab 50. May be effectively communicated to the scores 31, 32, 33. From this point of view, the two pieces 33a and 33b of the planned opening portion 30 are embossed around the point of pressurization for rigidity reinforcement so as to resist the vertical drag from the pressure unit 52 and prevent deformation. It is preferable to provide a processed embossed uneven portion 37 (see FIG. 8). In this case, the embossed uneven portion 37 is preferably formed so as not to interfere with the fracture path of the central score 31.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this example. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

It is the perspective view which showed the metal can which concerns on a prior art. It is the top view which showed the can lid | cover of FIG. 1A. It is the AA sectional view taken on the line of FIG. 1A which showed the can lid | cover of the open state. It is the top view showing the can lid concerning one embodiment of the present invention. It is the figure which showed the opening process of the can lid | cover of FIG. It is the BB sectional view taken on the line of (c) of FIG. 3A which showed the can lid in the opened state. It is the top view which showed the can lid concerning other embodiment of this invention. It is the top view which showed the can lid concerning other embodiment of this invention. It is the top view which showed the can lid concerning other embodiment of this invention. It is the top view which showed the can lid concerning other embodiment of this invention. It is the top view which showed the can lid concerning other embodiment of this invention. It is the top view which showed the can lid concerning other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Can lid 10 Main body 20 Recessed bottom part 21 Space | interval protrusion 30 Opening scheduled part 30a, 30b Fragment of opening scheduled part 31 Central score 31a, 31b End part (connection node) of central score
32 First boundary score 32a End portion of first boundary score 32d Extended extension portion 33 Second boundary score 33a End portion of second boundary score 33c Drinking extension portion 33d, 33d 'Extension extension portion 34 Processing buffer score 35 Stay portion 37 Emboss Concavity and convexity 50 Tab 51 Grasping part 52 Pressure part 70 Rivet

Claims (8)

A main body in which a predetermined region on the upper surface is partitioned into a portion to be opened by a score, and the main body and the rivet are coupled to each other. A can lid including a tab acting as a pressurizing part for applying pressure,
The center of the planned opening portion is provided with a center score whose center extends in the same direction as the extension direction of the tab,
One end located on the rivet side of the central score is provided with a first boundary score that is continuously and symmetrically extended from the central score,
The other end of the central score located opposite to the rivet is formed with a drinking extension continuously and symmetrically extended from the central score, and both ends thereof are close to the end of the first boundary score. By forming an extended extension that extends downward, a second boundary score is provided that divides and partitions the planned opening portion from the upper surface of the main body together with the first boundary score,
The can lid, wherein at least a region between the first boundary score and the second boundary score acts as a stay portion.   The can lid according to claim 1, wherein the center score is formed in a linear shape.   The can lid according to claim 1, wherein the extended extension of the second boundary score has a linear shape.   The can lid according to claim 1, wherein the extended extension of the second boundary score has a curved shape.   The can lid according to claim 1, wherein a length of the drinking extension portion of the second boundary score is longer than a lateral extension length of the first boundary score.   The can lid according to claim 1, wherein a length of the drinking extension portion of the second boundary score is shorter than a lateral extension length of the first boundary score.   The can lid according to claim 1, wherein the stay portion between the first boundary score and the second boundary score is formed in an intermediate region of the opening scheduled portion.   The embossed uneven portion is formed on the planned opening portion adjacent to a point where the pressing portion of the tab comes into contact without disturbing the breaking path of the central score. The described can lid.

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