JP6928502B2 - Can opening tab and can lid - Google Patents

Description

The present invention relates to a stayion tab type can-opening tab and a can lid that are fixed on a can lid body and are attached to the can lid body by pushing down a part of the can lid body to open a drinking spout. ..

For the purpose of so-called sales promotion (sales promotion activities) of cans such as beverage cans, campaigns are being conducted to present consumers with prizes according to the number of cans purchased. In addition, the can lid of the can can be opened with the drinking spout with the tab attached to the can lid body, and the tab and the can lid body can be partially fixed even after the can is opened. On-tab type can-opening tabs are widely used. Then, for sales promotion, a method is adopted in which a removable application sticker is attached to the can body of the can and the like, and the application sticker is collected.

By the way, Patent Document 1 discloses a stayion tab type can-opening tab in which a cut-off piece partially connected to the finger hole is formed in the finger hole (finger hole portion). In Patent Document 1, the can can be easily opened by operating the can opening tab to open the can, pushing out the cut piece with a fingertip, and then returning the can in the opposite direction once or twice. It is stated that the detached piece can be separated from the can tab. Further, Patent Document 1 describes that it is possible to carry out sales promotion in a stain tab by collecting only the separated pieces in a state of being separated from the can lid.

Japanese Unexamined Patent Publication No. 5-178346

In the can-opening tab of Patent Document 1, the finger hole and the separating piece are integrally connected by a connecting portion, and two notches are provided toward the inside of the separating piece at both ends in the width direction of the connecting portion. There is. Further, Patent Document 1 describes that by providing a notch in the connecting portion, the bending fulcrum of the cut-off piece moves slightly toward the center side of the cut-off piece, whereby the cut-off piece becomes easy to bend and the cut-off piece can be easily separated. Has been done.

However, in the shape in which the notch is provided in the connecting portion as in Patent Document 1, the finger hole and the separating piece are in a state of being connected by a band-shaped portion between the two notches, and the base end portion (connecting) of the notch is formed. The cutting position becomes unstable when it is cut at the part), at the tip (inside the cut part), or cut in the middle of the length direction of the cut. Further, the band-shaped portion formed by this notch is deformed by repeating the operation of pushing out the cut-off piece with a fingertip when separating the cut-off piece and the operation of pushing back the cut-off piece in the opposite direction thereafter. Therefore, if a band-shaped portion deformed on one side of the cut-off piece is left after the cut-off piece is cut, the band-shaped portion tends to come into contact with the finger, which may cause the user to feel pain or discomfort.

The present invention has been made in view of such circumstances, and provides a can-opening tab and a can lid that can separate the separated piece at a specific position and can improve the finger contact of the separated piece after separation. The purpose is to do.

The can-opening tab of the present invention has a fixing portion fixed to a rivet of the can lid body provided near the center of the tab body forming the outer shape, and a can lid body provided at the tip of the tab body. A pulling portion for pushing down and opening the opening piece and a pull for pulling up the can lid main body to push down the pushing portion provided on the opposite side of the pressing portion with the fixed portion of the tab body sandwiched. A tab panel provided between the upper portion and the pulling upper portion and the fixing portion and having a concave upper surface side so as to be convex toward the lower surface side is provided, and a part of the connecting portion is provided in the tab panel. A cut piece separated by a cut line is formed, and the cut line is a first cut line formed along the peripheral edge of the tab panel except for a part of the peripheral edge, and the first cut line. It has a pair of second cut lines formed from both ends of the cut piece toward the center side of the cut piece, and the distance between the pair of second cut lines is connected to both ends of the first cut line. It is gradually formed smaller from the base end portion side to the tip end portion side on the center side of the cut-off piece, and the connecting portion is formed between the pair of second cut lines.

In the can-opening tab of the present invention, the cut pieces are connected to the tab body via a connecting portion formed between the pair of second cut lines, and the distance between the pair of second cut lines is the base end. The width of the tip side of the connecting portion is formed to be the smallest by gradually forming the shape from the portion side to the tip portion side. As a result, the shear strength of the tip side of the connecting portion, that is, the connecting portion with the cutting piece is minimized, so that the cutting piece of the can-opening tab is directed either upward or downward with the fingertips. When extruded, the separated piece can be easily separated from the tip of the connecting portion. Therefore, only the separated piece can be separated from the tab body without separating the connecting portion and leaving it on one side. Further, since the width of the tip portion (distance between the pair of second cut lines) is formed smaller than that of the base end portion of the connecting portion, the shear surface generated when the tip portion of the connecting portion and the cut-off piece are sheared. The burr can also be made smaller. Further, since the connecting portion between the tip end portion of the connecting portion and the separating piece is located at a position where it enters the central side (inside) of the separating piece, it is possible to prevent a finger from coming into contact with the sheared surface of the separating piece. As described above, in the can-opening tab of the present invention, the cut-off piece can be separated at the connection position with the tip of the connecting portion, so that the connecting portion remaining on the cut-off piece may cause the user to feel pain or discomfort. It can be reduced and the finger contact can be improved.

As a preferred embodiment of the can-opening tab of the present invention, the connecting portion may be arranged on the pull-up side of the tab panel.

By arranging the connecting part that connects the cut piece to the tab body on the pulling part side, the cut piece can be easily pushed out with the thumb while supporting the lower surface side of the can opening tab with the index finger or the middle finger. The cut piece can be separated from the can opening tab.

As a preferred embodiment of the can opening tab of the present invention, the distance between the tips of the pair of second cut lines is preferably 0.3 mm or more and 3.0 mm or less.

If the distance between the tips of the pair of second cut lines (the width of the tips of the connecting portions) is less than 0.3 mm, the cut-off piece may be separated from the can-opening tab even with a small extrusion amount. It becomes difficult to manage the separated pieces in the manufacturing process and the like. On the other hand, if the distance between the tips of the pair of second cut lines exceeds 3.0 mm, it becomes difficult to separate the cut pieces. Further, as the distance between the tips of the pair of second cut lines increases, the sheared surface of the cut piece that appears on the outer peripheral surface of the cut piece becomes large, so that the sheared surface easily hits the finger. Therefore, the distance between the tips of the pair of second cut lines is preferably 0.3 mm or more and 3.0 mm or less, and 0.3 mm or more from the viewpoint of making it easier to separate the cut piece from the can opening tab. It is more preferably 1.5 mm or less.

As a preferred embodiment of the can opening tab of the present invention, the length between the base end portion and the tip end portion of the second cut line orthogonal to the distance between the pair of second cut lines is 0.5 mm or more. It is preferably 5.5 mm or less.

If the length of the second cut line is less than 0.5 mm, it becomes difficult to form a pair of second cut lines with a large difference between the base end portion and the tip end portion. For this reason, it becomes difficult to make the width of the connecting portion smaller on the tip end side than the base end portion, and it becomes difficult to reliably separate the separated pieces at the tip end portion of the connecting portion. On the other hand, if the length of the second cut line exceeds 1.5 mm, the connecting portion having a size exceeding 1.5 mm remains on the can-opening tab after the cut-off piece is separated from the tip of the connecting portion. become. Therefore, when the finger is brought into contact with the can-opening tab after the cut-off piece is separated, the user may feel pain or discomfort. Therefore, the length of the second cut line is preferably 0.5 mm or more and 1.5 mm or less.

As a preferred embodiment of the can opening tab of the present invention, the opening angle between the pair of second cut lines is preferably 30 ° or more and 90 ° or less.

By controlling the opening angle between the pair of second cut lines to 30 ° or more and 90 ° or less, it is possible to provide an appropriate gap difference between the base end portion and the tip end portion of the pair of second cut lines and connect them. The tip of the part can be reliably separated and the pieces can be easily separated. If the opening angle between the pair of second cut lines is less than 30 °, it becomes difficult to make a large difference in the size of the distance between the base end portion and the tip end portion of the pair of second cut lines. Further, if the opening angle exceeds 90 °, cracks are likely to occur at the tip of the connecting portion (between the tips of the pair of second cut lines), and if cracks occur, a small extrusion amount is required. Even if there is, there is a risk that the separated piece will be separated from the opening tab. For this reason, the risk that the separated piece is separated from the can-opening tab at an unintended timing increases, and it becomes difficult to manage the separated piece in the manufacturing process or the like.

As a preferred embodiment of the can opening tab of the present invention, the base end portion of the second cut line may consist of an arc line on a tangent circle connected to the first cut line.

By forming the base end of the second cut line with an arc line on the tangent circle connected to the first cut line, it is possible to prevent bending stress from concentrating on the base end when separating the cut pieces, and to connect them. Stress can be concentrated on the tip of the part. Therefore, it is possible to reliably separate the separated pieces at the tip of the connecting portion.

Further, the can lid of the present invention includes a can lid main body and the can opening tab.

According to the present invention, the separated piece can be separated from the tip end portion of the connecting portion without leaving the connecting portion on one side, and the sheared surface can be arranged at the position where it enters the center side of the separated piece, so that the cut piece remains on the separated piece. The connecting portion can reduce the risk of causing the user to feel pain or discomfort, and can improve finger contact.

It is a top view of the tab for opening a can of the embodiment of this invention. It is a rear view of the tab for opening a can shown in FIG. It is a main part plan view of the tab for opening a can shown in FIG. It is a top view explaining how the sheet material is sequentially processed in one Embodiment of the manufacturing method of the tab for opening a can. FIG. 5 is a plan view of a can lid according to an embodiment of the present invention to which the can opening tab shown in FIG. 1 is attached. FIG. 5 is a cross-sectional view of a can lid in a cross section taken along the line AA shown in FIG. It is sectional drawing of the main part of the can lid shown in FIG. It is a cross-sectional view of a main part of a can in which the can lid of this embodiment is wound around the open end of the can body body.

Hereinafter, embodiments of a can-opening tab and a can lid according to the present invention will be described with reference to the drawings.
The can lid 101 of the present embodiment is a so-called stayion tab type can lid used for cans such as beverage cans, and as shown in FIGS. 5 to 7, the can lid main body 2 and the can lid main body It is composed of a can opening tab 1 attached to 2. Further, as shown in FIG. 8, the can lid 101 configured in this way is a can in which the inside of the can body 3 is sealed by being wound around the open end of the can body 3 filled with the contents. 201 is manufactured. Although not shown, the can body 3 is formed in a bottomed tubular shape. The can body body 3, the can lid body 2, and the can opening tab 1 are each made of an aluminum alloy.

As shown in FIGS. 5 and 6, the can lid main body 2 has a substantially disk-shaped panel portion 21 and an annular counter sink provided so as to be convex downward along the outer peripheral portion of the panel portion 21. It is provided with a unit 22. A concavely formed panel deboss 23 is provided in a part of the panel portion 21, and a score 24 for defining the opening piece 27 and a rivet 25 for the opening piece 27 are provided on the bottom surface of the panel deboss 23. A finger hook recess 26 arranged on the opposite side is provided via the rivet.

The score 24 is configured to open the drinking spout by being broken by pressing by the can opening tab 1 and pushing the opening piece 27 into the can. An inner bead 28 protruding upward along the score 24 is formed on the opening piece 27 to reinforce the opening piece 27.
The rivet 25 is formed by applying a coining process for imprinting the upper surface of the panel portion 21 in a ring shape so that the central portion of the panel portion 21 projects upward.

Further, the finger hook recess 26 is formed so as to be along the rear end portion of the can opening tab 1 and in the vicinity thereof, a part of the bottom surface of the panel deboss 23 is further concave. As a result, the opening person can easily put his / her finger on the rear end portion and easily put the finger on the rear end portion (pulling upper portion 17) of the can opening tab 1 by inserting the finger from the finger hook recess 26 into the rear end portion (pulling upper portion 17). Can be pulled up.
Further, a convex portion 29 called a dimple is formed between the rivet 25 and the finger hook recess 26. Two convex portions 29 project from the upper surface of the panel deboss 23 and are formed at intervals in the width direction of the can opening tab 1. By catching the outer edge portion of the can-opening tab 1 on the convex portion 29, it is possible to prevent the can-opening tab 1 from rotating around the rivet 25.

As shown in FIGS. 1 and 2, the can-opening tab 1 is curled by bending the peripheral edge portion 19 of the tab body 11 forming the outer shape toward the lower surface side, thereby increasing the overall rigidity. ing. A fixing portion 12 having a rivet hole 15 to be fixed to the rivet 25 of the can lid main body 2 is provided near the center of the tab body 11. Further, the fixing portion 12 is partitioned by a U-shaped slot 13. Then, in the can opening tab 1, the rivet 25 of the can lid main body 2 is inserted into the rivet hole 15 formed in the fixing portion 12, and the lower surface of the fixing portion 12 is brought into contact with the bottom surface of the panel deboss 23. By crimping 25, it is attached to the can lid main body 2.

Further, the can-opening tab 1 is provided at the tip of the tab main body 11 and is provided with a pressing portion 16 for pushing down and opening the opening piece 27 of the can lid main body 2, and the tab main body 11 with respect to the pressing portion 16. A pulling upper portion 17 provided at the rear end portion arranged on the opposite side of the fixing portion 12 and pulled up from the can lid main body 2 to push down the pressing portion 16, and a pulling upper portion 17 and the fixing portion 12 of the tab main body 11. It is provided with a tab panel 14 which is provided between the two and has a concave upper surface side so as to be convex toward the lower surface side.

The peripheral edge portion 19 of the tab body 11 including the pressing portion 16 and the pulling upper portion 17 is formed by being folded back to the lower surface side. Further, the pulling upper portion 17 is formed in a concave shape at the rear end portion of the tab body 11 so that a part of the lower surface side (central portion in the width direction) of the peripheral edge portion 19 thereof is convex upward. The thickness of the pulling upper portion 17 is thinner than the thickness of the can opening tab 1 (thickness from the upper surface of the pulling upper portion 17 to the lower surface of the peripheral edge portion 19 protruding toward the lower surface side of the tab body 11).

As shown in FIG. 1, the tab panel 14 has a substantially rectangular shape in a plan view, and its four corners are chamfered by gentle arcs. The center and pressing portion of the rivet hole 15 of the tab body 11 The short side of the rectangle is arranged parallel to the center line L passing through the tip of 16, and the long side of the rectangle is arranged orthogonal to each other. Further, in the tab panel 14, a cutting piece 41 separated by a cutting line 53 is formed, leaving a part of the connecting portion 42. The cut-off piece 41 is marked with a sales promotion stamp or the like (not shown).

As shown in FIG. 3, the cut line 53 is a first cut line 51 formed along the peripheral edge of the tab panel 14 except for a part of the peripheral edge, and a cut piece 41 separated from both ends of the first cut line 51. It has a pair of second cut lines 52, 52 formed toward the center side. In this case, the cut line 53 is formed on the flat concave surface portion (bottom surface portion) 14s of the tab panel 14, and the first cut line 51 has a substantially rectangular shape in a plan view along the peripheral edge of the concave surface portion 14s. The four corners are chamfered by gentle arcs. Further, both ends of the first cut line 51 are arranged on the pulling upper portion 17 side of the tab panel 14, and are arranged symmetrically with respect to the center line L of the tab body 11.

Further, the distance between the pair of second cut lines 52, 52 connected to both ends of the first cut line 51 is gradually reduced from the base end side to the tip end side, and the first cut line 51 is formed. The distance W2 at the tip of the separation piece 41 on the center side is smaller than the distance W1 between the base ends connected to both ends of the cutting piece 41. Further, the base end portion of each of the second cut lines 52 is composed of an arc line 52e on a tangent circle connected to the first cut line 51, and the first cut line 51 and the second cut line 52 are smoothly connected to each other. There is. A connecting portion 42 is formed between the pair of second cutting lines 52 and 52, and the connecting portion 42 is arranged at one location in the central portion of the tab panel 14 on the pulling upper portion 17 side as shown in FIG. It is installed.

Further, the can opening tab 1 is formed by processing a metal plate having a plate thickness of 0.250 mm or more and 0.350 mm or less, and as shown in FIG. 3, a pair of second cut lines 52 forming a connecting portion 42. , 52, the distance W2 of the tip portions is 0.3 mm or more and 3.0 mm or less, and the length of each second cut line 52, that is, the length H in the direction orthogonal to the distance W2 of the pair of second cut lines 52, 52. Is 0.5 mm or more and 1.5 mm or less, and the opening angle α between these pair of second cutting lines 52 and 52 is provided at 30 ° or more and 90 ° or less.

When the distance W2 (width of the tip of the connecting portion 42) between the tips of the pair of second cutting lines 52 and 52 is less than 0.3 mm, the cutting piece 41 is the can opening tab 1 even with a small extrusion amount. It may be separated from the separated piece 41, and it becomes difficult to manage the separated piece 41 in the manufacturing process or the like. On the other hand, if the distance W2 between the tips of the pair of second cut lines 52, 52 exceeds 3.0 mm, it becomes difficult to separate the separation piece 41. Further, as the distance W2 between the tip portions of the pair of second cut lines 52, 52 becomes larger, the sheared surface of the separated piece 41 appearing on the outer peripheral surface of the separated piece 41 becomes larger, so that the sheared surface is more likely to hit the finger. Therefore, the distance between the tips of the pair of second cut lines 52, 52 is preferably 0.3 mm or more and 3.0 mm or less, and from the viewpoint of facilitating the separation of the separation piece 41 from the can opening tab 1. , 0.3 mm or more and 1.5 mm or less is more preferable.

Further, if the length H of the second cut line 52 is less than 0.5 mm, it becomes difficult to form the pair of second cut lines 52, 52 with a large difference between the base end portion and the tip end portion. For this reason, it becomes difficult to reduce the width of the connecting portion 42 on the tip end side of the base end portion, and it becomes difficult to reliably separate the cutting piece 41 at the tip end portion of the connecting portion 42. On the other hand, when the length H of the second cut line 52 exceeds 1.5 mm, the connecting portion 42 having a size exceeding 1.5 mm is opened after the cutting piece 41 is separated from the tip of the connecting portion 42. It will remain in tab 1. Therefore, when the finger is brought into contact with the can-opening tab 1 after the cut-off piece 41 is separated, the user may feel pain or discomfort. Therefore, the length H of the second cut line 52 is preferably 0.5 mm or more and 1.5 mm or less.

Further, by controlling the opening angle α between the pair of second cut lines 52, 52 to 30 ° or more and 90 ° or less, the base end portion and the tip end portion of the pair of second cut lines 52, 52 are appropriate. An interval difference can be provided, and the cutting piece 41 can be easily separated by surely at the tip end portion of the connecting portion 42. If the opening angle α between the pair of second cut lines 52, 52 is less than 30 °, there is a large difference in the size of the distance between the base end portion and the tip end portion of the pair of second cut lines 52, 52. It becomes difficult. Further, when the opening angle α exceeds 90 °, cracks are likely to occur in the tip portion of the connecting portion 42 (between the tip portions of the pair of second cut lines 52 and 52), and if cracks occur, cracks are likely to occur. Even with a small extrusion amount, the separation piece 41 may be separated from the can opening tab 1. Therefore, the risk that the cut-off piece 41 is separated from the can-opening tab 1 at an unintended timing increases, and it becomes difficult to manage the cut-off piece 41 in the manufacturing process or the like.

In the can-opening tab 1 configured in this way, as shown in FIG. 4, the strip-shaped sheet material 70 is sequentially fed in the direction indicated by the white arrow (forward feed direction), and the drilling step (S11) is performed. After performing the tab panel processing step (S12), the outer shape removing step (S13), the curl step (S14, S15), and the cutting piece processing step (S16) in sequence, the sheet material 70 is formed by being separated from the carrier portion 71. The sheet material 70 is made of an aluminum alloy, and the can-opening tabs 1 are formed in a single row or a plurality of rows can be formed at the same time. In FIG. 4, the center line of the can-opening tab 1 (the center line of the tab body 11 passing through the center of the rivet hole 15 and the tip of the pressing portion 16) L is along the length direction (forward feed direction) of the sheet material 70. It shows what is molded in a row so that it is arranged in a row. In FIG. 4, the alternate long and short dash line L indicates the center line of the can-opening tab 1 to be molded. Further, in FIG. 4, the shaded area indicates a portion disappeared from the surface of the sheet material 70 due to drilling or bending.
Hereinafter, the steps will be described in order.

<Drilling process (S11)>
In the drilling step (S11), as shown at the position of S11 in FIG. 4, a material relief hole for forming the tip of the rivet hole 15, the U-shaped slot 13 around the fixing portion 12, and the pressing portion (tab nose) 16. 72, a carry strip hole 74 for forming the connecting piece 18, a pilot hole 75, and the like are formed. Of these, the rivet holes 15, the slots 13, and the material relief holes 72 are arranged on the center line L of the can opening tab 1, and two carry strip holes 74 are formed symmetrically with respect to the center line L. A connecting piece 18 is formed between the two carry strip holes 74. Further, the material relief hole 72 is formed in a substantially isosceles triangle shape in a plan view, and is formed so as to gradually reduce the width from the front end to the rear end along the center line L of the can opening tab 1. ..

In FIG. 4, it is shown that a plurality of holes are formed in one station, but this drilling step (S11) has a plurality of stations, a pilot hole 75 is formed in the first station, and each of the following stations is formed. In the station, the above-mentioned plurality of holes are formed separately in a plurality of times while positioning with reference to the position of the pilot hole 75. Further, in the example shown in FIG. 4, the pilot hole 75 is formed only on one side of the can-opening tab 1 to be formed, but may be formed so as to be arranged on both sides.

<Tab panel processing process (S12)>
In the tab panel processing step (S12), the concave tab panel 14 is formed as shown at the position of S12 in FIG. As shown in FIG. 4, the tab panel 14 is formed on the same side with respect to the two connecting pieces 18 and the rivet holes 15 formed in the previous drilling step (S11), and these two tab panels 14 are formed. The connecting pieces 18 are formed so as to be symmetrical with respect to the tab panel 14 on both sides of the sheet material 70 in the progressive feed direction (symmetrical with respect to the center line L in FIG. 4). In other words, the tab panel 14 is formed so as to be arranged between the two carry strip holes 74. When the tab panel 14 is formed, it is drawn, so that the surrounding material is drawn into the tab panel 14 to be formed. Since the outer diameter punching step (S13) described below has not yet been performed in the tab panel processing step (S12), the sheet material 70 exists in a sufficient area around the molded portion of the tab panel 14. .. Therefore, the shrinkage deformation of the tab panel 14 during molding can be appropriately restrained, and the occurrence of wrinkles is prevented.

<Outer shape removing process (S13)>
In the outer shape removing step (S13), as shown at the position of S13 in FIG. 4, between two carry strip holes 74 provided at two locations on the left and right via the center line L (connecting piece 18). ) Is removed, and the outer edge of the tab material 61 formed by unfolding the tab body 11 is cut. By this outer shape removing step, the tab material 61 is in a state of being connected to the carrier portion 71 of the sheet material 70 by each connecting piece 18 formed between the two carry strip holes 74. Further, at this point, the tab material 61 has a flat shape except for the tab panel 14.

<Curl process (S14, S15)>
The curl step (S14, S15) further includes an end bending step (S14) and a folding step (S15).
(End bending process)
In the edge bending step (S14), as shown at the position of S14 in FIG. 4, the peripheral edge of the tab material 61 from which the outer shape has been removed is slightly bent to the back side, and the vicinity of the U-shaped slot 13 is pressed. The portion (fixed portion) 12 surrounded by the slot 13 is arranged at a position pushed down from the peripheral edge portion of the tab material 61.

(Folding process)
In the folding step (S15), as shown at the position of S15 in FIG. 4, the edge-bent peripheral portion of the tab material 61 is bent 90 ° from the inside to the back side of the end-bent portion, and then curled. Fold it back into shape. Around the tab panel 14, the three sides of the tab panel 14 except the rivet hole 15 side, that is, both side portions and the tip portion (pulling upper portion 17) of the tab panel 14 have a curl shape except for the connecting piece 18.
By going through this curling step (S14, S15), the peripheral edge portion of the tab material 61, which is flat except for the tab panel 14, is folded back to substantially form the contour of the can opening tab 1.

<Separation piece processing process (S16)>
In the cutting piece processing step (S16), as shown at the position of S16 in FIG. 4, a cut line 53 is formed in the tab panel 14 leaving a part of the connecting portion 42, and the tab main body 11 is formed via the connecting portion 42. The cut-off piece 41 connected to the above is formed. At this time, in addition to processing the cut-off piece 41, processing such as further crushing the pulling upper portion 17 is also performed to adjust the shape.

Finally, by cutting the connecting piece 18, the can opening tab 1 is separated from the carrier portion 71 of the sheet material 70. Further, the can opening tab 1 manufactured in this way is placed on the can lid main body 2, the rivet 25 of the can lid main body 2 is inserted into the rivet hole 15, and the rivet 25 is crushed to crush the can lid main body. It is fixed to 2 and the can lid 101 is manufactured.

As described above, in the can-opening tab 1 of the present embodiment, as shown in FIG. 3, the cut-off piece 41 is tabbed via the connecting portion 42 formed between the pair of second cut lines 52 and 52. It is connected to the main body 11, and the distance between the pair of second cut lines 52, 52 is gradually reduced from the base end side to the tip end side, whereby the width of the connecting portion 42 on the tip end side (spacing W2). ) Is formed to be the smallest. As a result, the shear strength of the tip end side of the connecting portion 42, that is, the connecting portion with the cutting piece 41 is minimized, so that the cutting piece 41 of the can opening tab 1 is moved either upward or downward. By pushing it out with a fingertip toward it, it is possible to easily separate the piece 41 from the tip of the connecting portion 42. Therefore, only the cut-off piece 41 can be separated from the tab body 11 without leaving the connecting portion 42 on the side of the cut-off piece 41.

Further, since the width of the tip portion (spacing W2) is formed smaller than the width of the base end portion (spacing W1) of the connecting portion 42, the shearing surface generated when the tip portion of the connecting portion 42 and the separation piece 41 are sheared. The burr can also be reduced. Further, since the connecting portion between the tip end portion of the connecting portion 42 and the separating piece 41 is located at a position where it enters the center side (inside) of the separating piece 41, it is possible to prevent a finger from coming into contact with the sheared surface of the separating piece 41. ..

Further, in the can-opening tab 1 of the present embodiment, since the connecting portion 42 for connecting the separating piece 41 to the tab main body 11 is arranged on the pulling upper portion 17 side of the tab panel 14, the separating piece 41 is separated from the tab main body 11. At the time of separation, the cut-off piece 41 can be pushed out with the thumb while supporting the lower surface side of the can-opening tab 1 with the index finger, the middle finger, or the like, and the cut-off piece 41 can be easily separated from the can-opening tab 1.

Further, since the base end portion of the second cut line 52 forming the connecting portion 42 is formed by the arc line 52e on the tangent circle connected to the first cut line 51, when the cut-off piece 41 is separated from the tab body 11. , It is possible to prevent the bending stress from being concentrated on the base end portion of the connecting portion 42, and it is possible to concentrate the stress on the tip end portion of the connecting portion 42. Therefore, the separation piece 41 can be reliably separated at the tip of the connecting portion 42.

As described above, in the can opening tab 1 of the present embodiment, the separating piece 41 can be separated at the connection position with the tip end portion of the connecting portion 42, so that the connecting portion 42 remaining in the separating piece 41 causes pain to the user. The risk of feeling uncomfortable can be reduced, and finger contact can be improved.

The present invention is not limited to the configuration of the above embodiment, and various changes can be made to the detailed configuration without departing from the spirit of the present invention.

1 Can opening tab 2 Can lid body 3 Can body body 11 Tab body 12 Fixing part 13 Slot 14 Tab panel 14s Concave part 15 Rivet hole 16 Pushing part 17 Pulling upper part 18 Connecting piece 19 Peripheral part 21 Panel part 22 Counter sink part 23 Panel debossing 24 Score 25 Rivet 26 Finger hook recess 27 Opening piece 28 Inner bead 29 Convex part 41 Separation piece 42 Connecting part 51 First cut line 52 Second cut line 52e Arc line 53 Cut line 61 Tab material 70 Sheet material 71 Carrier part 72 Material relief Hole 74 Carry strip hole 75 Pilot hole 101 Can lid 201 Can

Claims (7)

A fixing part that is fixed to the rivet of the can lid body provided near the center of the tab body that forms the outer shape,
A pressing portion provided at the tip of the tab body and for pushing down and opening the opening piece of the can lid body,
A pulling portion provided on the opposite side of the tab body with respect to the pressing portion and from which the can lid body is pulled up to push down the pressing portion.
A tab panel provided between the pulling upper portion and the fixing portion and having a concave upper surface side so as to be convex toward the lower surface side is provided.
In the tab panel, a cutting piece separated by a cutting line is formed, leaving a part of the connecting portion.
The cut line is a pair of a first cut line formed along the peripheral edge of the tab panel except for a part of the peripheral edge, and a pair formed from both ends of the first cut line toward the center side of the cut piece. Has a second cut line and
The distance between the pair of second cut lines is gradually reduced from the base end side connected to both ends of the first cut line to the tip end side on the center side of the separation piece.
A can-opening tab, characterized in that the connecting portion is formed between the pair of second cut lines. The can opening tab according to claim 1, wherein the connecting portion is arranged on the pulling upper side of the tab panel. The can opening tab according to claim 1 or 2, wherein the distance between the tips of the pair of second cut lines is 0.3 mm or more and 3.0 mm or less. Claim 1 is characterized in that the length between the base end portion and the tip end portion of the second cut line orthogonal to the distance between the pair of second cut lines is 0.5 mm or more and 1.5 mm or less. The tab for opening a can according to any one of 3 to 3. The tab for opening a can according to any one of claims 1 to 4, wherein the opening angle between the pair of second cut lines is 30 ° or more and 90 ° or less. The tab for opening a can according to any one of claims 1 to 5, wherein the base end portion of the second cut line is formed of an arc line on a tangent circle connected to the first cut line. A can lid comprising a can lid main body and the can opening tab according to any one of claims 1 to 6.

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