Bottle

Abstract

To suppress the shape of a constriction part, extending downward from a connection part between a trunk part and a shoulder part, in cross-sectional view from changing from a circular shape to a flat shape during pressure reduction in a bottle even when made thin.SOLUTION: A mouth part 11, a shoulder part 12, a trunk part 13, and a bottom part 14 are arranged in this order from above to below along a bottle axis O. The trunk part comprises a constriction part 21 in a projection curve shape radially inward in longitudinal section view along the bottle axis, and the constriction part extends downward from a connection part 15 between the trunk part and the shoulder part. The connection part in a projection curve shape radially outward in the longitudinal section view connects with the constriction part along the bottle axis without any step. Multiple inclined grooves 25 extending along the bottle axis and in a direction crossing a circumferential direction are formed circumferentially at intervals at a part of the constriction part including a deepest part 21a located on the radially innermost position, and the size of the inclined grooves along the bottle axis is equal to or larger than a half of the size of the constriction part along the bottle axis.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a bottle. [Background technology]

[0002] Conventionally, as shown in, for example, Patent Document 1 below, a bottle has been known in which the mouth, shoulder, body, and bottom are arranged in this order from top to bottom along the bottle axis, the body has a constricted portion that is curved radially inward in a vertical cross section along the bottle axis, and a convex curved surface portion that extends downward from the constricted portion and is curved radially outward in the vertical cross section, the constricted portion extends downward from a connection portion between the body and the shoulder, the connection portion is curved radially outward in the vertical cross section, and is connected to the constricted portion without any steps in the bottle axis direction, and a plurality of concave and convex portions extending in the bottle axis direction are arranged along the circumferential direction on the convex curved surface portion of the body. The constricted portion is gripped, for example, when lifting the bottle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-115013 A Summary of the Invention [Problem to be solved by the invention]

[0004] If an attempt is made to reduce the weight of a conventional bottle by forming it into a thinner bottle, there is a risk that the cross-sectional shape of the narrowed portion of the body will be easily deformed from a circular shape to a flattened shape such as an oval shape, for example, when the pressure inside the bottle is reduced or a compressive load is applied in the axial direction of the bottle.

[0005] The present invention provides a bottle that can suppress the cross-sectional shape of a constricted portion extending downward from the connection between a body and a shoulder from deforming from a circular shape to a flattened shape when, for example, the pressure inside the bottle is reduced, even if the bottle is made thin. [Means for solving the problem]

[0006] A bottle according to one embodiment of the present invention has a mouth, shoulder, body, and bottom arranged in that order from top to bottom along the bottle axial direction, the body having a waist portion which protrudes in a curved shape toward the radially inward direction when viewed in a vertical cross section along the bottle axial direction, the waist portion extending downward from a connection portion between the body and shoulder portion, the connection portion protruding in a curved shape toward the radially outward direction when viewed in the vertical cross section, and connecting to the waist portion without any steps in the bottle axial direction, a portion of the waist portion including its deepest part which is located most radially inward has a plurality of inclined grooves formed at intervals in the circumferential direction, extending in a direction intersecting the bottle axial direction and the circumferential direction, the size of the inclined grooves in the bottle axial direction being at least half the size of the waist portion in the bottle axial direction.

[0007] In the part of the constriction that includes the deepest part located radially inward, a plurality of inclined grooves extending in a direction intersecting the bottle axial direction and circumferential direction are formed at intervals circumferentially, and the size of the inclined grooves in the bottle axial direction is more than half the size of the constriction in the bottle axial direction.This increases the radial rigidity of the entire constriction and suppresses a decrease in buckling strength compared to when a circumferential groove is provided instead of an inclined groove. Since the inclined groove is formed in the constricted portion and is spaced apart from the connection portion between the body portion and the shoulder portion, it is possible to prevent the inclined groove from causing the connection portion to undergo inverted deformation radially inward and become prone to bending extending in the axial direction of the bottle.

[0008] The deepest part of the neck portion may be located below a center part of the neck portion in an axial direction of the bottle.

[0009] Since the deepest part of the constricted portion is located below the center of the constricted portion in the bottle axial direction, it is possible to ensure that the portion of the constricted portion located above the deepest part that is supported by the hand holding the constricted portion has a long size in the bottle axial direction, resulting in a bottle that is easy to hold.

[0010] The body portion includes a lower body portion extending downward from the constricted portion, and the size of the constricted portion in the bottle axis direction may be smaller than the size of the lower body portion in the bottle axis direction.

[0011] Since the size of the constricted portion in the bottle axis direction is smaller than the size of the lower body portion in the bottle axis direction, the radial rigidity of the entire constricted portion can be reliably increased.

Advantages of the Invention

[0012] According to the above aspect of the present invention, even if the thickness is thin, it is possible to suppress the cross-sectional shape of the constricted portion extending downward from the connection portion between the body portion and the shoulder portion from deforming from a circular shape to a flat shape during decompression in the bottle or the like.

Brief Description of the Drawings

[0013]

Figure 1

Embodiments for Carrying Out the Invention

[0014] Hereinafter, with reference to the drawings, a bottle according to an embodiment of the present invention will be described. As shown in FIG. 1, the bottle 1 according to the present embodiment includes a mouth portion 11, a shoulder portion 12, a body portion 13, and a bottom portion 14. These 11 to 14 are arranged in this order in a state where their respective central axes are located on a common axis. The cross-sectional shape of each of the mouth portion 11, the shoulder portion 12, the body portion 13, and the bottom portion 14 when viewed in a cross-section perpendicular to the bottle axis O is circular.

[0015] Hereinafter, the common axis is referred to as the bottle axis O, the side of the mouth portion 11 along the bottle axis O is referred to as the upper side, the side of the bottom portion 14 along the bottle axis O is referred to as the lower side, the direction intersecting the bottle axis O when viewed from the bottle axis O direction is referred to as the radial direction, and the direction of orbiting around the bottle axis O when viewed from the bottle axis O direction is referred to as the circumferential direction.

[0016] The bottle 1 is formed by blow molding a preform formed into a cylindrical shape with a bottom by injection molding, and is integrally formed from a synthetic resin material such as polyethylene terephthalate. The weight of the bottle 1 is 0.050 g or less per 1 ml of the internal volume of the bottle 1. The length of the bottle 1 in the direction of the bottle axis O is, for example, 115 mm to 260 mm, and in the illustrated example, is approximately 180 mm. The internal volume of the bottle 1 is, for example, 150 ml to 1100 ml, and in the illustrated example, the bottle 1 is for 500 ml.

[0017] The mouth portion 11 is formed in a cylindrical shape extending in the direction of the bottle axis O. A cap is removably attached to the mouth portion 11. The bottom portion 14 is formed in a bottomed cylindrical shape having a peripheral wall and a bottom wall. The peripheral wall of the bottom portion 14 extends radially inward as it extends downward. The shoulder portion 12 extends radially outward as it extends downward from the lower end of the mouth portion 11. When viewed in a vertical cross section along the bottle axis O, the shoulder portion 12 has a curved shape that protrudes diagonally upward toward the radially outward direction. The connection portion 15 between the shoulder portion 12 and the body portion 13 is curved in a radially outward direction when viewed in the vertical cross section, and is connected to the shoulder portion 12 and the body portion 13 without any steps in the direction of the bottle axis O. The radial outer end of the connection portion 15 forms the part of the bottle 1 with the maximum outer diameter. The body portion 13 includes a waist portion 21 and a lower body portion 22.

[0018] The constricted portion 21 has a curved shape that protrudes radially inward in the vertical cross section. The constricted portion 21 extends downward from the connecting portion 15 and constitutes the upper portion of the body portion 13. The size of the constricted portion 21 in the bottle axis O direction is equal to the sum of the sizes of the shoulder portion 12 and the connecting portion 15 in the bottle axis O direction. In the vertical cross section, the radius of curvature of the constricted portion 21 is larger than the radius of curvature of the connecting portion 15. The deepest part 21a of the constricted portion 21, which is located at the innermost radial position, is located lower than the central part 21b of the constricted portion 21 in the bottle axis O direction. The size of the constricted portion 21 in the bottle axis O direction is smaller than the size of the lower body portion 22 in the bottle axis O direction. The lower body portion 22 includes a convex curved portion 23 and a straight portion 24, and extends downward from the waist portion 21.

[0019] The convex curved surface portion 23 has a curved shape that protrudes radially outward in the vertical cross section, and is connected to the neck portion 21 without any steps in the direction of the bottle axis O. The size of the convex curved surface portion 23 in the direction of the bottle axis O is smaller than the size of the neck portion 21 in the direction of the bottle axis O. In the vertical cross section, the radius of curvature of the convex curved surface portion 23 is equal to the radius of curvature of the neck portion 21. A first circumferential groove 23a is formed at the upper end of the convex curved surface portion 23, extending continuously over the entire circumferential length.

[0020] The straight portion 24 extends straight downward from the convex curved portion 23, and is connected to the convex curved portion 23 and the peripheral wall of the bottom portion 14 without any steps in the direction of the bottle axis O. The size of the straight portion 24 in the direction of the bottle axis O is larger than the size of the constricted portion 21 in the direction of the bottle axis O. A plurality of second circumferential grooves 24a are formed in the straight portion 24 at intervals in the direction of the bottle axis O, extending continuously over the entire circumferential length.

[0021] In this embodiment, in the constricted portion 21, in a portion including the central portion 21b and the deepest portion 21a in the bottle axis O direction, a plurality of inclined grooves 25 extending in a direction intersecting the bottle axis O direction and the circumferential direction are formed at intervals in the circumferential direction. The size of the inclined groove 25 in the bottle axis O direction is half or more of the size of the constricted portion 21 in the bottle axis O direction (about 88% in the illustrated example). The groove width of the inclined groove 25 is narrower than the interval between the inclined grooves 25 adjacent to each other in the circumferential direction.

[0022] The inclined groove 25 is located below the connection portion 15 between the shoulder portion 12 and the body portion 13 and above the lower body portion 22. That is, the size of the inclined groove 25 in the bottle axis O direction is less than 100% of the size of the constricted portion 21 in the bottle axis O direction. The inclined groove 25 is provided over the entire length in the bottle axis O direction of the constricted portion 21 excluding both end portions in the bottle axis O direction. The inclined groove 25 is separated downward by 5 mm or less (about 1.5 mm in the illustrated example) from the connection portion 15 between the shoulder portion 12 and the body portion 13. The inclined groove 25 is separated upward by 5 mm or less from the lower body portion 22. In the illustrated example, the distance in the bottle axis O direction between the inclined groove 25 and the connection portion 15 is smaller than the distance in the bottle axis O direction between the inclined groove 25 and the lower body portion 22.

[0023] Both end portions of the inclined groove 25 in the bottle axis O direction face the other inclined grooves 25 adjacent in the circumferential direction with the bottle axis O. For example, when the inclined groove 25 extends toward one side in the circumferential direction (the right side in FIG. 1) as it goes upward, the upper end portion of the inclined groove 25 faces the other inclined grooves 25 adjacent on one side in the circumferential direction in the bottle axis O direction, and the lower end portion of the inclined groove 25 faces the other inclined grooves 25 adjacent on the other side in the circumferential direction (the left side in FIG. 1) in the bottle axis O direction.

[0024] The inclination angle of the inclined groove 25 with respect to the bottle axis O is 40° or more and 70° or less. The groove width of the inclined groove 25 is 1.2 mm or more and 2.5 mm or less. The depth of the inclined groove 25 is 0.5 mm or more and 2.0 mm or less.

[0025] As described above, according to the bottle 1 of the present embodiment, in the constricted portion 21, a plurality of inclined grooves 25 extending in a direction intersecting the bottle axis O direction and the circumferential direction are formed at intervals in the circumferential direction in a portion including the deepest portion 21a located at the innermost side in the radial direction. Since the size of the inclined groove 25 in the bottle axis O direction is equal to or more than half of the size of the constricted portion 21 in the bottle axis O direction, it is possible to increase the radial rigidity of the entire constricted portion 21, and compared with the case where a circumferential groove is provided instead of the inclined groove 25, a decrease in buckling strength can be suppressed. Since the inclined groove 25 is formed in the constricted portion 21 and is away from the connection portion 15 between the body portion 13 and the shoulder portion 12, it is possible to prevent the connection portion 15 from being reversely deformed inward in the radial direction and being easily broken in the bottle axis O direction due to the inclined groove 25.

[0026] Since the deepest portion 21a of the constricted portion 21 is located below the central portion 21b in the bottle axis O direction in the constricted portion 21, it is possible to ensure a longer size in the bottle axis O direction of the portion located above the deepest portion 21a supported by the hand holding the constricted portion 21 in the constricted portion 21, and a bottle 1 that is easy to hold can be obtained.

[0027] Since the size of the constricted portion 21 in the bottle axis O direction is smaller than the size of the lower body portion 22 in the bottle axis O direction, it is possible to surely increase the radial rigidity of the entire constricted portion 21.

[0028] Note that the technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0029] For example, the deepest portion 21a of the constricted portion 21 may be located at the same position in the bottle axis O direction with respect to the central portion 21b in the bottle axis O direction in the constricted portion 21, or may be located above. The body portion 13 may not have the lower body portion 22 and may be composed of the constricted portion 21 over the entire length in the bottle axis O direction. The size of the constricted portion 21 in the bottle axis O direction may be equal to or greater than the size of the lower body portion 22 in the bottle axis O direction.

[0030] In addition, within the scope not departing from the gist of the present invention, it is possible as appropriate to replace the constituent elements in the above-described embodiment with well-known constituent elements, and the above-described embodiment and the above-described modified example may also be combined as appropriate.

Explanation of Reference Numerals

[0031] 1 Bottle 11 Mouth portion 12 Shoulder portion 13 Body portion 14 Bottom portion 15 Connection portion 21 Constricted portion 21a Deepest portion 21b Central portion 22 Lower body portion 25 Inclined groove O Bottle axis

Claims

1. The mouth portion, the shoulder portion, the body portion, and the bottom portion are arranged in this order from top to bottom along the bottle axial direction, The body portion has a constricted portion that is curved radially inward when viewed in a vertical cross section along the bottle axis direction, The waist portion extends downward from a connection portion between the torso portion and the shoulder portion, The connection portion has a curved shape that protrudes radially outward in the vertical cross-sectional view, and is connected to the neck portion without any step in the bottle axial direction, A plurality of inclined grooves extending in a direction intersecting the bottle axial direction and the circumferential direction are formed at intervals in the circumferential direction in a portion including a deepest portion located at the radially innermost side of the neck portion, A bottle, wherein the size of the inclined groove in the axial direction of the bottle is equal to or greater than half the size of the necked portion in the axial direction of the bottle.

2. 2. The bottle according to claim 1, wherein the deepest part of the neck portion is located below a center part of the neck portion in an axial direction of the bottle.

3. The body portion includes a lower body portion extending downward from the waist portion, 3. The bottle according to claim 1, wherein the size of the neck portion in the axial direction of the bottle is smaller than the size of the lower body portion in the axial direction of the bottle.

Images