JP2019156430A - Can body - Google Patents

Abstract

To provide a can body improved in a mouth-contact property of a curl part.SOLUTION: The can body has a curl part in which a cut tip part is formed at an opening part to be folded back to outside in a radial direction. In a cross section along a can shaft direction passing through a can shaft, when a width of the curl part in the can shaft direction from an upper end position of the curl part to a lower end position of the curl part is defined as W (mm) and a distance in the can shaft direction from the upper end position of the curl part to an outermost diameter position of the curl part is defined as V (mm), a ratio (V/W) of the distance V to the width W is 0.50 or more and 0.75 or less.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a bottle-shaped can body having a curl portion at an opening portion to which a cap is attached.

  As a container filled with beverages and other contents, a metal cap (cap) is attached to the opening of a bottle-shaped can (bottle can) made of steel, aluminum alloy, etc., and the inside is sealed with a liner on the inner surface of the cap. Such a structure is known. In the opening of such a can body, a curled portion having the same shape as the bottle mouth is formed, and the inside of the can body is sealed by attaching the skirt portion of the cap around the curled portion. . For this reason, the curl part is formed relatively large with respect to the opening part of the can body.

  For example, in Patent Document 1, a board part (curl part) formed by curling the front end part of a mouth part outwardly is made of metal in which a cap for tearing and opening a score by pulling a tab is tightened and fixed. A can is disclosed. In this metal can, the upper end portion of the bead portion is inclined inward, and the bead portion is provided in a shape in which the position closest to the lower end is convex outward. Patent Document 1 does not specifically disclose the dimensions of the bead portion.

  In the metal bottle can disclosed in Patent Document 2, a diameter-reduced portion that is reduced in diameter from the upper end of the mouth portion, a raised portion that extends upward from the upper end of the reduced-diameter portion, an upper bent portion that is an upper end of the raised portion, and an upper portion thereof A curved portion that extends downward and protrudes outward while smoothly spreading outward from the bent portion, a lower bent portion at the lower end of the bent portion, and a straight portion that linearly extends from the lower bent portion to the reduced diameter portion Are formed. Also in this metal bottle can, the lower bent part near the lower end of the curled part is provided in a shape that protrudes most outward. In Patent Document 2, the height I of the curled portion is 6.0 to 3.0 mm, preferably 4.0 to 3.5 mm, and the width J of the curled portion is 5.0 to 2.0 mm. It is preferably 4.0 to 2.8 mm, the curvature radius R1 of the upper bent portion is 0.5 to 1.0 mm, preferably 0.6 to 0.9 mm, and the curvature radius R2 of the curved portion is 2. It is described that it is 0.0-3.0 mm, and the curvature radius R3 of a lower bending part is 0.5-1.0 mm.

International Publication No. 2007/122971 JP 2011-116456 A

  As described in Patent Document 1 and Patent Document 2, in a can body in which a cap is mounted by winding a skirt portion of the cap around the curled portion, the curled portion is formed relatively large. In such a can body, the contents inside the can body can be directly drunk by directly attaching a mouth (lips) to the curl portion formed in the opening. However, in such a can, the curl portion is formed to be relatively large, and depending on the shape of the curl portion, the purchaser may feel uncomfortable when the lips touch the curl portion.

  This invention is made | formed in view of such a situation, and it aims at providing the can which improved the mouth-feeling property of the curl part.

  The can body of the present invention has a curled portion formed by folding the cutting tip portion radially outward in the opening, and in a cross section along the can axis direction passing through the can shaft, from the upper end position of the curled portion. The width of the curled portion in the can axis direction to the lower end position of the curled portion is W (mm), and the distance in the can axis direction from the upper end position of the curled portion to the outermost diameter position of the curled portion is V Assuming (mm), the ratio (V / W) between the width W and the distance V is 0.50 or more and 0.75 or less.

  In this can body, the ratio (V / W) is set to 0.50 or more and 0.75 or less, and the outermost diameter position of the curled portion is arranged near the center in the can axis direction of the width W of the curled portion. The surface exposed to the outer surface of the part can be formed in a gently curved shape from the upper end position to the lower end position. In this way, the outermost diameter position where the lips are most easily touched when the mouth is attached to the curled portion can be formed with a gently curved shape, so that the purchaser feels uncomfortable when attaching the mouth to the curled portion. The mouthfeel of the curled portion can be improved.

  As a preferred embodiment of the can body of the present invention, in the cross section along the can axis direction passing through the can axis, the curled portion of the curl portion may be lower in the can axis direction and radially inward from the outermost diameter position. It is preferable that the radius of curvature of the lower bent portion on the outer periphery that is bent toward the end is 1.0 mm or more.

  By making the radius of curvature of the outer peripheral lower bent portion continuous with the outermost diameter position of the curled portion 1.0 mm or more and forming it with a large curved surface, the mouth feel of the curled portion can be further improved.

  As a preferred embodiment of the can body of the present invention, in a cross section along the can axis direction passing through the can axis, a radial direction from the outer surface of the base end position of the curled portion to the outermost diameter position of the curled portion. The distance is preferably 2.0 mm or more.

  By placing the outermost diameter position of the curled part at least 2.0 mm away from the outer surface of the base end position of the curled part, when attaching the cap to the opening of the can body, the nail of the tool is placed under the curled part Can be easily pushed into. That is, the skirt portion of the cap can be securely wound around the lower portion of the curl portion. Therefore, even if the radius of curvature of the outer peripheral lower bent portion formed on the lower side of the curled portion is increased, the cap can be securely attached to the opening, and the content can be well sealed.

  According to the present invention, the outermost diameter position where the lips are most easily touched when the mouth is attached to the curled portion can be formed in a gently curved shape, so that the purchaser does not feel uncomfortable and the palpability of the curled portion Can be improved.

It is the front view which made the right half of the bottle container using the can of 1st Embodiment of this invention the cross section which passes along a can axis | shaft. It is principal part sectional drawing which made the upper part vicinity of the trunk | drum of the can body shown in FIG. 1 the cross section which passes a can axis | shaft. It is principal part sectional drawing of the mouth part vicinity of the can shown in FIG. It is principal part sectional drawing which made the cross section which passes along a can axis | shaft the upper part vicinity of the trunk | drum of the can body of 2nd Embodiment of this invention. It is principal part sectional drawing of the mouth part vicinity of the can shown in FIG. It is principal part sectional drawing which made the cross section which passes along a can axis | shaft the upper part vicinity of the trunk | drum of the can body of 3rd Embodiment of this invention. It is principal part sectional drawing of the mouth part vicinity of the can shown in FIG. It is principal part sectional drawing which made the cross section which passes along a can axis | shaft the upper part vicinity of the trunk | drum of the can body of 4th Embodiment of this invention. It is principal part sectional drawing of the mouth part vicinity of the can shown in FIG. It is principal part sectional drawing which made the cross section which passes along the can axis | shaft the upper part vicinity of the trunk | drum of the can body of 5th Embodiment of this invention. It is principal part sectional drawing of the mouth part vicinity of the can shown in FIG.

Hereinafter, embodiments of a can according to the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIGS. 1 and 2, the can body (bottle can) 101 according to the first embodiment of the present invention is formed in a bottle shape as a whole, and has a curled portion 43 in an opening 15 that opens to the outside. The can body 101 is opened by attaching (clamping) the cap 201 to the mouth portion 14 as shown in FIG. The part 15 is sealed to form a bottle container 301. FIG. 1 shows a bottle container 301 including a can body 101 and a cap 201 attached to the mouth portion 14 of the can body 101. In FIG. 1, the right half of the bottle container 301 is shown as a cross section passing through the can axis C.

  The can body 101 is made of a thin plate metal such as aluminum or aluminum alloy, and includes a cylindrical body portion (wall) 10 and a disk-shaped bottom portion (bottom) 20 as shown in FIG. It is formed in a bottom cylindrical shape.

  As shown in FIG. 1, the trunk | drum 10 and the bottom part 20 are mutually arrange | positioned coaxially, In this embodiment, these common shafts are called the can axis | shaft C, and it demonstrates. Of the directions along the can axis C (the can axis C direction), the direction from the opening 15 toward the bottom 20 is the lower side (downward), and the direction from the bottom 20 toward the opening 15 is the upper side (upper). In the following description, the vertical direction is determined in the same manner as the direction shown in FIG. A direction perpendicular to the can axis C is referred to as a radial direction. Of the radial directions, the direction approaching the can axis C is the inside (inward) in the radial direction, and the direction away from the can axis C is the outside in the radial direction ( Outward). Moreover, let the direction which goes around the can axis | shaft C be a circumferential direction.

  In the present embodiment, the bottom portion 20 of the can body 101 is located on the can shaft C and is formed so as to bulge upward (inside the trunk portion 10), and the dome portion 21. The heel part 22 which connects the outer peripheral edge part and the lower end part of the trunk | drum 10 is provided. In addition, the connecting portion between the dome portion 21 and the heel portion 22 is on the grounding surface (mounting surface) so that the can body 101 is in an upright posture (the posture in which the opening 15 shown in FIG. 1 faces upward). When placed, the grounding portion 23 is in contact with the grounding surface. The grounding portion 23 protrudes most downward in the bottom portion 20 and has an annular shape extending along the circumferential direction.

  As shown in FIG. 1, the barrel portion 10 of the can body 101 has a cylindrical portion 11 formed in a cylindrical shape on the lower side (bottom portion 20 side) of the barrel portion 10, and a radially inner portion at the upper end of the cylindrical portion 11. A shoulder 12 having a diameter reduced upward in the direction of the can axis C, a neck 13 connected to the upper end of the shoulder 12 and extending upward in the direction of the can axis C, and an upper end of the neck 13 And a mouth portion 14 connected to the outside and opening to the outside. The cylindrical portion 11, the shoulder portion 12, the neck portion 13, and the mouth portion 14 each have an annular shape that extends over the entire circumference of the trunk portion 10.

  Among these, as shown in FIGS. 1-3, the neck part 13 is made into the shape diameter-reduced gradually toward the upper direction of the can-axis C direction, rather than the cylindrical part 11 formed in the lower part of the trunk | drum 10. It has a small diameter. Moreover, the upper end of the neck part 13 is formed in the smallest diameter. In the can body 101 of the present embodiment, the neck portion 13 includes a concave connection concave portion 31 that protrudes radially inward continuously from the upper end of the shoulder portion 12 and a can axis C direction continuous to the upper end of the connection concave portion 31. And a tapered cylindrical portion 32 that gradually decreases in diameter toward the center. The upper end of the tapered cylinder portion 32 is connected to the lower end of the mouth portion 14.

  The mouth portion 14 is formed continuously from the upper end of the tapered cylindrical portion 32, and has a large diameter portion 41 once expanded at the upper end of the tapered cylindrical portion 32 and reduced in diameter again at the upper end of the large diameter portion 41. A small diameter portion 42 and a curled portion 43 formed at the upper end of the small diameter portion 42 are provided.

  As shown in FIG. 3, the curled portion 43 is formed in a cross section (longitudinal cross section) along the can axis C direction passing through the can axis C. It is formed in a folded state. In FIG. 3, the curled portion 43 is parallel to the can axis C direction at the upper end of the small diameter portion 42 inclined at a predetermined angle with respect to the can axis C in a cross section along the can axis C direction passing through the can axis C. An inner peripheral lower side bent portion 143 that bends, an inner peripheral side cylindrical portion 144 that extends vertically from the upper end of the inner peripheral lower side bent portion 143 toward the upper side in the direction of the can axis C in parallel to the can axis C, and the inner peripheral side An inner peripheral upper bent portion 145 that is bent so as to spread outward from the upper end of the cylindrical portion 144 in the radial direction, and a zenith portion 142 that extends horizontally outward from the outer peripheral edge of the inner peripheral upper bent portion 145 in the radial direction. The outer peripheral upper bent portion 146 bent so as to be folded back from the outer peripheral edge of the zenith portion 142 toward the lower side in the can axis C direction, and the outer peripheral edge of the outer peripheral upper bent portion 146 is parallel to the can axis C in the can axis C direction. Under the outer cylindrical portion 147 extending vertically downward and under the outer cylindrical portion 147 The outer peripheral lower bent portion 148 that is bent downward in the can axis C direction and inward in the radial direction, and contracted from the lower end of the outer peripheral lower bent portion 148 toward the intermediate position in the small axis portion 42 in the can axis C direction. An inwardly tapered curled end portion 149 extending in diameter is continuously formed.

  As described above, in this embodiment, the curled end portion 149 extends toward the middle position of the small diameter portion 42, and the curled end portion 149 is disposed toward the upper end portion 42a of the small diameter portion 42 as shown in FIG. In this case, the position facing the lower end of the cutting tip 141 arranged at the tip of the curl end 149 is the base end position of the curl 43. In FIG. 3, the base end position of the curled portion 43 is indicated by a broken line A. The shape of the portion formed above the lower end of the cutting tip 141 in the can axis C direction is the curled portion 43. That is, the curled portion 43 is formed including the upper end portion 42a of the small diameter portion 42 arranged on the proximal end side, and the shape from the upper end portion 42a of the small diameter portion 42 to the tip of the curled end portion 149 (cutting tip portion 141) is formed. The curled portion 43 is used.

  The width W (mm) of the curled part 43 in the can axis C direction is a vertical distance parallel to the can axis C from the upper end position of the curled part 43 to the lower end position of the curled part 43 in the can axis C direction. In the cross section along the can axis C direction passing through the can axis C shown in FIG. 3, the zenith portion 142 is disposed at the uppermost position of the curl portion 43 in the can axis C direction, and the lower end (base end position A) of the cutting tip portion 141. Is arranged at the lowermost position in the can axis C direction of the curled portion 43, and the width W is a vertical distance from the outer surface of the zenith portion 142 to the lower end of the cutting tip portion 141. The radial thickness T (mm) of the curled portion 43 is a horizontal distance orthogonal to the can axis C from the innermost diameter position to the outermost diameter position of the curled portion 43 in the radial direction. In the cross section along the can axis C direction passing through the can axis C shown in FIG. 3, the inner peripheral cylindrical portion 144 is disposed at the innermost position in the radial direction of the curled portion 43, and the outer peripheral cylindrical portion 147 is the curled portion 43. It is arranged at the outermost position in the radial direction, and the thickness T is the horizontal distance from the outer surface of the inner peripheral side cylindrical portion 144 to the outer surface of the outer peripheral side cylindrical portion 147.

  In this embodiment, when the outer diameter of the curled portion 43 is D, the ratio (T / D) between the outer diameter D and the thickness T is 0.07 or more and 0.12 or less, and the thickness T of the curled portion 43 is It is formed in a size of 7% to 12% of the outer diameter D. Specifically, for example, in the can body 101 in which the outer diameter D of the curled portion 43 is 25 mm to 40 mm, the thickness T of the curled portion 43 is 2.0 mm to 4.5 mm, preferably 3.0 mm to 4 mm. 0.0 mm or less. Further, the width W of the curled portion 43 is 3.0 mm or more and 5.0 mm or less, preferably 3.5 mm or more and 4.7 mm or less. If the thickness T of the curled portion 43 exceeds 4.5 mm, cracks are likely to occur during the molding process of the curled portion 43. On the other hand, when the thickness T is smaller than 2.0 mm, it is difficult to obtain a predetermined shape in the outer peripheral upper bent portion 146 in the molding process.

  In the present embodiment, the outer cylindrical portion 147 disposed at the outermost diameter position of the curl portion 43 is formed with a predetermined width in the can axis C direction. Therefore, if the distance (vertical distance) in the can axis C direction from the upper end position (the zenith part 142) of the curl part 43 to any position of the outer cylindrical part 147 is V (mm), the width W and the distance V (V / W) is 0.50 or more and 0.75 or less, and the outer cylindrical portion 147 which is the outermost diameter position of the curled portion 43 is 50% or more and 75% or less from the upper end position of the curled portion 43. It is arranged within the range.

  As shown in FIG. 3, in the curled portion 43, the vertical distance in the can axis C direction from the upper end position of the curled portion 43 to the upper end position of the outer cylindrical portion 147 is V1 (mm), and from the upper end position of the curled portion 43. The vertical distance in the can axis C direction to the lower end position of the outer cylindrical portion 147 is V2 (mm). In this case, the distance V1 is 50% or more of the width W of the curled portion 43, and the distance V2 is 75% or less of the width W of the curled portion 43. In FIG. 3 and the like, as described above, the outermost diameter position of the curled portion 43 is formed with a width by the outer cylindrical portion 147 formed in a straight shape, but does not have the outer cylindrical portion 147. Alternatively, the curled portion 43 may be formed by forming the outer peripheral upper bent portion 146 and the outer peripheral lower bent portion 148 on a continuous curved surface (bent surface). In this case, the connection position between the lower end of the outer peripheral upper bent portion 146 and the upper end of the outer peripheral lower bent portion 148 is the outermost diameter position of the curled portion 43.

  Thus, in the can body 101, the ratio (V / W) of the width W to the distance V is set to 0.50 or more and 0.75 or less, and the outermost diameter position of the curled portion 43 (in this case, the outer cylindrical portion 147). ) Is arranged near the center of the curl portion 43 in the direction of the can axis C with the width W. For this reason, the surface exposed to the outer surface of the curled portion 43 is formed in a gently curved shape from the upper end position to the lower end position.

  Further, in the curled portion 43, the radius of curvature R12 of the outer peripheral upper bent portion 146 disposed on the outer peripheral side is formed sufficiently larger than the radius of curvature R11 of the inner peripheral upper bent portion 145. Further, the radius of curvature R13 of the outer peripheral lower bent portion 148 that is continuous with the lower end of the outer peripheral cylindrical portion 147 at the outermost diameter position is formed to be smaller than the radius of curvature R12 of the outer peripheral upper bent portion 146, but is relatively gentle. It is formed with a (large) radius of curvature.

  As shown in FIG. 3, the radius of curvature R11 of the inner peripheral upper bent portion 145 is, for example, 0.5 mm or more and 2.0 mm or less, preferably 0.5 mm or more and 1.0 mm or less. The The curvature radius R12 of the outer peripheral upper side bend 146 is, for example, 1.5 mm to 3.5 mm, preferably 2.0 mm to 3.0 mm. The curvature radius R13 of the outer peripheral lower bent portion 148 is formed to be 1.0 mm or more, preferably 1.5 mm or less. The radius of curvature R11 of the inner peripheral upper side bent portion 145, the radius of curvature R12 of the outer peripheral upper side bent portion 146, and the radius of curvature R13 of the outer peripheral lower side bent portion 148 may be a single curvature radius, or a plurality of different curvature radii. Arcs may be continuous.

  By making the curvature radius R13 of the outer periphery lower side bending portion 148 continuous with the outermost diameter position of the curled portion 43 to be 1.0 mm or more and forming it with a large curved surface, without feeling uncomfortable when the lips hit, Furthermore, the mouth feel of the curled portion 43 can be improved. In addition, when curvature radius R13 is larger than 1.5 mm, there exists a possibility that fitting property with the cap 201 may fall.

  Moreover, when the curvature radius R12 of the outer peripheral upper side bend 146 is larger than 3.5 mm, the sealing performance is deteriorated. On the other hand, when the radius of curvature R12 is smaller than 1.5 mm, the mouth feel is deteriorated and cracks and wrinkles may occur when the curled portion 43 is formed.

  A curled end 149 extending from the lower end of the outer peripheral lower bent portion 148 is formed in a substantially straight taper shape. An angle α formed by the outer surface of the curled end portion 149 and a horizontal line orthogonal to the can axis C direction is set to, for example, 0 ° to 45 °. The tip of the curled end 149 (cutting tip 141) is disposed away from the outer surface of the neck 13, and a slight gap is provided between the outer surface of the neck 13 and the cutting tip 141. The cutting tip 141 may be brought into contact with the outer surface of the neck 13.

  Further, the radial distance Hd from the outer surface at the base end A position of the curled portion 43 (the surface exposed on the surface of the can body 101) to the outermost diameter position of the curled portion 43 (the outer surface of the outer cylindrical portion 147) is: It is formed to 2.0 mm or more.

  However, the said dimension of the can 101 is not restricted to the said numerical range. Further, the other dimensions of the can body 101 are not limited. Taking other examples of the other dimensions of the can body 101 as well, the plate thickness of the can body 101 is such that the original thickness of the aluminum alloy plate before forming is 0.250 mm to 0.500 mm, and the thickness at the curled portion 43 is Is 0.200 mm to 0.400 mm.

  As shown in FIG. 1, the can body 101 configured in this manner is provided with a cap 201 in the opening 15 of the mouth portion 14 to form a bottle container 301. Specifically, after filling the inside of the can body 101, the cap 201 is put on the mouth portion 14. Then, by pressing the cap 201 downward from the upper direction of the can axis C and compressing the sealing material 112, the skirt portion 111 of the cap 201 is pressed radially inward by the nail of the tool. The skirt portion 111 is deformed so as to follow the outer surface of the curled portion 43. As a result, the lower end portion of the skirt portion 111 is wound around the curled end portion 149 of the curled portion 43, and the cap 201 is attached to the can body 101.

  In the mounted state of the cap 201, the lower end portion of the cap 201 is hooked from the outer peripheral lower bent portion 148 to the curled end portion 149 of the curled portion 43. The sealing material 112 is brought into close contact with the bent portion 148, so that the inside of the can body 101 can be reliably sealed. On the other hand, by removing the cap 201 from the mouth portion 14, the opening 15 of the can body 101 is opened, and the contents filled in the can body 101 can be poured out.

  As described above, in the can body 101 of this embodiment, the ratio (V / W) between the width W of the curled portion 43 and the distance V from the upper end position of the curled portion 43 to the outermost diameter position is 0.50 or more. The outermost diameter position of the curled portion 43 is arranged near the center of the curled portion 43 in the direction of the can axis C. For this reason, the surface exposed to the outer surface of the curled portion 43 can be formed in a gently curved shape from the upper end position to the lower end position. Thus, when the mouth is attached to the curled portion 43, the outermost diameter position where the lips are most easily touched can be formed in a gently curved shape, so that the purchaser feels uncomfortable when attaching the mouth to the curled portion 43. Therefore, the mouth feel of the curled portion 43 can be improved.

  Further, in the can body 101, the curvature radius R13 of the outer peripheral lower bent portion 148 continuous to the outermost diameter position of the curled portion 43 is set to 1.0 mm or more and is formed with a large curved surface. The sex can be further improved.

  Further, the radius of curvature R13 of the outer peripheral lower bent portion 148 is increased to 1.0 mm or more, but the outermost diameter position of the curled portion 43 is separated from the outer surface of the base end position A of the curled portion 43 by 2.0 mm or more. Therefore, when the cap 201 is attached to the opening 15 of the can body 101, the nail of the tool can be easily pushed into the lower side of the curled portion 43. That is, the skirt portion 111 (see FIG. 1) of the cap 201 can be securely wound around the lower portion of the curl portion 43. Therefore, even if the curvature radius R13 of the outer peripheral lower bent portion 148 formed on the lower side of the curled portion 43 is increased to 1.0 mm or more, the cap 201 can be securely attached to the opening 15 and the contents are sealed. Good maintainability.

(Second Embodiment)
4 and 5 show a can body 102 according to a second embodiment of the present invention. In the description of the second embodiment and FIGS. 4 and 5, the same reference numerals are used to simplify the description of the same parts as those in the first embodiment.

  In the can body 101 of the first embodiment described above, the diameter of the large diameter portion 41 once expanded at the upper end of the tapered cylindrical portion 32 of the neck portion 13 and the upper diameter of the large diameter portion 41 are reduced again at the lower portion of the mouth portion 14. The tapered cylindrical portion 32 of the neck portion 13 and the curled portion 43 of the mouth portion 14 are connected via the large diameter portion 41 and the small diameter portion 42. On the other hand, in the can body 102 of the second embodiment shown in FIGS. 4 and 5, a curled portion 44 is formed continuously with the tapered cylindrical portion 32 of the neck portion 13.

  As shown in FIG. 5, the curled portion 44 has a cross-section (longitudinal section) along the can axis C direction passing through the can axis C, and the cutting tip portion 141 of the can body 102 is radially outward. It is formed in a folded state. Similar to the curled portion 43 of the first embodiment, the curled portion 44 is a tapered cylindrical portion 32 that is inclined at a predetermined angle with respect to the can axis C in a cross section (FIG. 5) along the can axis C direction passing through the can axis C. The inner peripheral lower bent portion 143 is bent so as to be parallel to the can axis C direction at the upper end of the inner periphery, and the upper end of the inner peripheral lower bent portion 143 is perpendicular to the upper direction in the can axis C direction in parallel with the can axis C. An inner peripheral side cylindrical portion 144 extending from the upper end of the inner peripheral side cylindrical portion 144, an inner peripheral upper side bent portion 145 that is bent so as to spread radially outward, and an outer peripheral edge of the inner peripheral upper side bent portion 145. A zenith portion 142 that extends horizontally outward in the radial direction, an outer peripheral upper bent portion 146 that bends from the outer peripheral edge of the zenith portion 142 toward the lower side in the can axis C direction, and an outer periphery of the outer peripheral upper bent portion 146 Peripheral side extending perpendicularly from the periphery in the direction of the can axis C in parallel with the can axis C A cylindrical portion 147, an outer peripheral lower bent portion 148 that is bent downward from the lower end of the outer cylindrical portion 147 in the can axis C direction and radially inward, and a small diameter portion 42 from the lower end of the outer peripheral lower bent portion 148. And an inwardly tapered curled end portion 149 that extends while being reduced in diameter toward the middle position in the can axis C direction.

  In the can body 102 of the second embodiment, the curled end portion 149 extends toward the middle position of the tapered cylindrical portion 32, and is a position facing the lower end of the cutting tip portion 141 disposed at the tip of the curled end portion 149. Is the base end position of the curled portion 44. In FIG. 5, the base end position of the curled portion 44 is indicated by a broken line A. The shape of the portion formed above the lower end of the cutting tip 141 in the can axis C direction is the curled portion 44. That is, the curled portion 44 is formed including the upper end portion 32a of the tapered cylindrical portion 32 disposed on the proximal end side, and extends from the upper end portion 32a of the tapered cylindrical portion 32 to the distal end of the curled end portion 149 (cutting distal end portion 141). The shape is a curled portion 44. In FIG. 5, the base end position of the curled portion 44 is indicated by a broken line A.

  Also in the can body 102 of the second embodiment, the ratio (V / W) between the width W of the curled portion 44 and the distance V from the upper end position of the curled portion 44 to the outermost diameter position (the outer surface of the outer cylindrical portion 147). The outermost diameter position of the curled portion 44 is arranged near the center of the curled portion 44 in the can axis C direction. For this reason, the surface exposed to the outer surface of the curled portion 44 can be formed in a gently curved shape from the upper end position to the lower end position. Moreover, since the curvature radius R13 of the outer periphery lower side bending part 148 continuing to the lower end of the outermost diameter position of the curl part 44 is set to 1.0 mm or more and formed with a large curved surface, as in the first embodiment, The mouth feel of the curled portion 44 can be improved.

  Further, also in the can body 102 of the second embodiment, the outermost diameter position of the curled portion 44 is arranged at a distance of 2.0 mm or more from the outer surface of the proximal end position A of the curled portion 44, so that the cap skirt portion ( (Not shown) can be securely wound around the lower portion of the curled portion 44. Therefore, even if the curvature radius R13 of the outer peripheral lower bent portion 148 formed on the lower side of the curled portion 44 is formed to be larger than 1.0 mm, the cap can be securely attached to the opening portion 15 and the contents can be sealed. Can be maintained well.

(Third embodiment)
6 and 7 show a can body 103 according to a third embodiment of the present invention. In the description of the third embodiment and FIGS. 6 and 7, the same reference numerals are used to simplify the description of the same parts as those in the first and second embodiments described above.

  In the can body 102 of the second embodiment described above, the curled portion 44 is formed including the upper end portion 32a of the tapered cylindrical portion 32. However, like the can body 103 of the third embodiment, the inner peripheral side cylindrical portion is formed. 144 may be formed long, and the upper end of the inner peripheral lower bent portion 143 may be disposed below the cutting tip portion 141 of the curled portion 45 in the can axis C direction. As shown in FIG. 7, in the can body 103 of the third embodiment, the curled end portion 149 extends toward the middle position of the inner peripheral side cylindrical portion 144 and is cut at the tip of the curled end portion 149. A position facing the lower end of the distal end portion 141 is a base end position of the curled portion 45. In FIG. 7, the base end position of the curled portion 45 is indicated by a broken line A. The shape of the portion formed above the lower end of the cutting tip 141 in the can axis C direction is the curled portion 45. That is, the shape from the upper end portion 144 a of the inner peripheral side cylindrical portion 144 to the tip end of the curled end portion 149 (cutting tip end portion 141) is the curled portion 45.

  Also in the can body 103 of the third embodiment, the ratio (V / W) between the width W of the curled portion 45 and the distance V from the upper end position of the curled portion 45 to the outermost diameter position (the outer surface of the outer cylindrical portion 147). Is set to 0.50 or more and 0.75 or less, and the outermost diameter position of the curled portion 45 is arranged near the center of the curled portion 45 in the can axis C direction, and the surface exposed to the outer surface of the curled portion 45 is from the upper end position. It is formed in a gently curved shape toward the lower end position. Further, since the curvature radius R13 of the outer peripheral lower bent portion 148 continuous to the lower end of the outermost diameter position of the curled portion 45 is set to 1.0 mm or more and formed with a large curved surface, the first embodiment and the second embodiment. Similarly to the form, the mouth feel of the curled portion 45 can be improved.

  Further, in the can body 103 of the third embodiment, the outermost diameter position of the curled portion 45 is arranged at a distance of 2.0 mm or more from the outer surface of the base end position A of the curled portion 45, so that the cap skirt portion ( (Not shown) can be securely wound around the lower portion of the curled portion 45. Further, in the can body 103 of the third embodiment, the upper end of the inner peripheral lower bent portion 143 is disposed below the cutting tip portion 141 of the curled portion 45 in the can axis C direction, and from the lower end position of the curled portion 45. Since the inner peripheral lower bent portion 143 is disposed apart, a certain gap can be formed between the curled portion 45 and the inner peripheral lower bent portion 143. For this reason, when the cap is mounted on the opening 15 of the mouth portion 14, the nail of the tool can be easily pushed into the lower side of the curled portion 45, and the skirt portion of the cap is easily wound around the curled portion 45. Can do. Therefore, even if the curvature radius R13 of the outer peripheral lower bent portion 148 formed on the lower side of the curled portion 45 is formed to be larger than 1.0 mm, the cap can be securely attached to the opening portion 15 and the contents can be sealed. Can be maintained well.

(Fourth embodiment)
8 and 9 show a can body 104 according to a fourth embodiment of the present invention. In the description of the fourth embodiment and FIGS. 8 and 9, the same reference numerals are used for the parts common to the first to third embodiments described above to simplify the description.

  In the cans 101 to 103 of the first to third embodiments, an inwardly tapered curled end portion 149 extending while reducing the diameter from the lower end of the outer peripheral lower bent portion 148 of the curled portions 43 to 45 to the cutting tip portion 141. However, the shape of the curled portion is not limited to this. Like the can body 104 of the fourth embodiment shown in FIGS. 8 and 9, the portion between the lower end of the outer peripheral lower bent portion 148 and the cutting tip portion 141 is bent, and the upper and radial directions in the can axis C direction. It is also possible to form the curled portion 46 having the tip bent portion 151 that is bent inward.

  In the curled portion 46, the connecting portion between the outer peripheral lower bent portion 148 and the tip bent portion 151 is the lower end position in the can axis C direction of the curled portion 46, and the lower end position faces the inner peripheral cylindrical portion 144 facing the curled portion. 46 base end positions are provided. In FIG. 9, the base end position of the curled portion 46 is indicated by a broken line A. The shape of the portion formed above the lower end position of the curled portion 46 in the can axis C direction is the curled portion 46. That is, the shape from the upper end portion 144a of the inner peripheral side cylindrical portion 144 to the distal end of the distal end bending portion 151 (cutting distal end portion 141) is the curled portion 46.

  In FIG. 9, the radius of curvature R14 of the outer surface of the tip bent portion 151 is formed larger than the radius of curvature R13 of the outer peripheral lower bent portion 148, but the radius of curvature R14 is the same as the radius of curvature R13. Alternatively, the radius of curvature R14 may be formed with a radius of curvature smaller than the radius of curvature R13.

  Also in the can body 104 of the fourth embodiment, the ratio (V / W) between the width W of the curled portion 46 and the distance V from the upper end position of the curled portion 46 to the outermost diameter position (outer surface of the outer cylindrical portion 147). Is set to 0.50 or more and 0.75 or less, and the outermost diameter position of the curled portion 46 is arranged near the center of the curled portion 46 in the can axis C direction. For this reason, the surface exposed to the outer surface of the curled portion 46 can be formed in a gently curved shape from the upper end position to the lower end position. Moreover, since the curvature radius R13 of the outer periphery lower side bending part 148 continuing to the lower end of the outermost diameter position of the curl part 46 is 1.0 mm or more, it is formed with a large curved surface, so that the first to third embodiments and Similarly, the mouth feel of the curled portion 46 can be improved.

  Also, in the can body 104 of the fourth embodiment, the outermost diameter position of the curled portion 46 is arranged at a distance of 2.0 mm or more from the outer surface of the base end position A of the curled portion 46, so that the cap skirt portion ( (Not shown) can be securely wound around the lower portion of the curled portion 46. Further, in the can body 104 of the fourth embodiment, the upper end of the inner peripheral lower bent portion 143 is disposed below the cutting tip portion 141 of the curled portion 45 in the can axis C direction. A certain gap can be formed between the inner periphery lower bent portion 143. For this reason, when the cap is attached to the opening 15 of the mouth portion 14, the nail of the tool can be easily pushed into the lower side of the curled portion 46, and the skirt portion of the cap is easily wound around the curled portion 46. Can do. Accordingly, even if the radius of curvature R13 of the outer peripheral lower bent portion 148 formed on the lower side of the curled portion 46 is formed to be larger than 1.0 mm, the cap can be securely attached to the opening portion 15 and the contents can be sealed. Can be maintained well.

(Fifth embodiment)
10 and 11 show a can body 105 according to a fifth embodiment of the present invention. In the description of the fifth embodiment and FIGS. 10 and 11, the same reference numerals are used for the parts common to the first to fourth embodiments described above, and the description is simplified.

  In the can body 104 of the fourth embodiment described above, the upper end of the inner peripheral lower bent portion 143 is disposed below the cutting tip portion 141 of the curled portion 46 in the can axis C direction. However, the can body of the fifth embodiment As in 105, the curled portion 47 may be formed including the upper end portion 32 a of the tapered cylindrical portion 32. As shown in FIG. 11, in the can body 105 of the fifth embodiment, a portion formed on the upper side in the can axis C direction from the lower end position, which is a connection portion between the outer peripheral lower bent portion 148 and the tip bent portion 151. Is the curled portion 47. That is, the shape from the upper end portion 32 a of the tapered cylindrical portion 32 to the tip end of the tip bent portion 151 (cutting tip portion 141) is the curled portion 47. In FIG. 11, the base end position of the curled portion 47 is indicated by a broken line A.

  Also in the can body 105 of the fifth embodiment, the ratio (V / W) between the width W of the curled portion 47 and the distance V from the upper end position of the curled portion 47 to the outermost diameter position (the outer surface of the outer cylindrical portion 147). Is set to 0.50 or more and 0.75 or less, and the outermost diameter position of the curled portion 47 is disposed near the center of the curled portion 47 in the can axis C direction. For this reason, the surface exposed to the outer surface of the curled portion 47 can be formed in a gently curved shape from the upper end position to the lower end position. Moreover, since the curvature radius R13 of the outer periphery lower side bending part 148 continuing to the lower end of the outermost diameter position of the curl part 47 is set to 1.0 mm or more, it is formed with a large curved surface, so that the first to fourth embodiments and Similarly, the mouth feel of the curled portion 47 can be improved.

  Also in the can body 105 of the fifth embodiment, the outermost diameter position of the curled portion 47 is arranged at a distance of 2.0 mm or more from the outer surface of the base end position A of the curled portion 47, so that the cap skirt portion ( (Not shown) can be securely wound around the lower portion of the curled portion 47. Therefore, even if the curvature radius R13 of the outer peripheral lower bent portion 148 formed on the lower side of the curled portion 47 is formed to be larger than 1.0 mm, the cap can be securely attached to the opening 15 and the sealing performance of the contents Can be maintained well.

In addition, this invention is not limited to the thing of the structure of the said embodiment, In a detailed structure, it is possible to add a various change in the range which does not deviate from the meaning of this invention.
For example, in the above embodiment, the bottomed cylindrical can body in which the bottom portion 20 and the body portion 10 are integrally formed has been described. However, the can body does not necessarily include a bottom portion, and the curled portion is included. After molding, the body part includes a part formed by winding a separately formed bottom part.

DESCRIPTION OF SYMBOLS 10 trunk | drum 11 cylindrical part 12 shoulder part 13 neck part 14 mouth part 15 opening part 20 bottom part 21 dome part 22 heel part 23 grounding part 31 connection recessed part 32 taper cylinder part 41 large diameter part 42 small diameter parts 43, 44, 45, 46, 47 Curled part 101, 102, 103, 104, 105 Can body 111 Skirt part 112 Sealing material 141 Cutting tip part 142 Zenith part 143 Inner circumference lower side bent part 144 Inner circumference side cylindrical part 145 Inner circumference upper side bent part 146 Outer circumference upper side bent part Portion 147 outer peripheral side cylindrical portion 148 outer peripheral lower side bent portion 149 curled end portion 151 distal end bent portion 201 cap 301 bottle container A base end position C of curled portion can shaft

Claims (3)

The opening has a curled portion formed by folding the cutting tip portion radially outward,
In a cross section along the can axis direction passing through the can axis, the width of the curled portion in the can axis direction from the upper end position of the curled portion to the lower end position of the curled portion is W (mm), and the upper end position of the curled portion If the distance in the can axis direction from the curled portion to the outermost diameter position is V (mm), the ratio (V / W) between the width W and the distance V is 0.50 or more and 0.75 or less. A can body characterized by being.   In the cross section along the can axis direction that passes through the can axis, the curvature of the outer lower bent portion that bends from the outermost diameter position downward in the can axis direction and radially inward from the curled portion. The can according to claim 1, wherein the radius is 1.0 mm or more.   In a cross section along the can axis direction passing through the can axis, a radial distance from an outer surface of a base end position of the curled portion to the outermost diameter position of the curled portion is 2.0 mm or more, The can according to claim 1 or 2.

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