Bottle

Abstract

To suppress deformation of an end part in a bottle axis direction of a column part following the deformation of a panel surface part, when the inside of a bottle is decompressed.SOLUTION: At a cylindrical trunk part 13 extending in a bottle axis direction, a plurality of panel surface parts 16 recessed toward the inside in the radial direction is formed with an interval in the circumferential direction, and a space between panel surface parts adjacent to each other in the circumferential direction is made to be a column part 21. Out of both end parts in the bottle axis direction in the column part, at least at one end part, a pair of inclined surfaces 22 is formed extending toward the inside in the radial direction as they are separated in the circumferential direction from a central part in the circumferential direction in the column part. Both end edges 22a, 22b in the bottle axial direction on the inclined surface respectively extend in the direction being separated from each other in the bottle axis direction, as they go toward the central part in the circumferential direction in the column part from the end part in the circumferential direction in the column part.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] Conventionally, there has been known a bottle in which a cylindrical body extending in the bottle axial direction has a plurality of panel surface portions spaced circumferentially apart, recessed radially inward, and the portion between adjacent panel surface portions in the circumferential direction formed as a pillar portion, such as the configuration shown in Patent Document 1 below, in which at least one of both ends of the pillar portion in the bottle axial direction is formed with a pair of inclined surfaces that extend radially inward as it moves away from the circumferential center of the pillar portion in the circumferential direction. In this bottle, when the body tries to deform radially inward, the connection part of the pair of inclined surfaces tries to displace radially inward, so that a circumferential compressive force is applied to the inclined surfaces. This increases the reaction force (restoring force) toward the outside of the diameter generated by the inclined surfaces, and suppresses the deformation of the column. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-068969 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, when the pressure inside the bottle is reduced, if the panel surface portion deforms significantly inward in the radial direction, it is thought that the end portion of the column portion in the axial direction of the bottle may also deform accordingly. This problem becomes apparent when the bottle is made lighter for environmental reasons.

[0005] The present invention provides a bottle that can suppress deformation of the end of the column in the axial direction of the bottle due to deformation of the panel surface portion when the pressure inside the bottle is reduced. [Means for solving the problem]

[0006] A bottle according to one embodiment of the present invention has a cylindrical body extending in the bottle axial direction, on which a plurality of panel surface portions are formed at intervals in the circumferential direction, the panel surface portions being recessed radially inward, and the portion between adjacent panel surface portions in the circumferential direction being a pillar portion, and at least one of the two end portions of the pillar portion in the bottle axial direction is formed with a pair of inclined surfaces extending radially inward as it moves away from the circumferential center of the pillar portion, and both end edges of the inclined surfaces in the bottle axial direction each extend in a direction away from each other in the bottle axial direction as they move from the circumferential end portion of the pillar portion toward the circumferential center of the pillar portion.

[0007] At least one of the ends of the column in the bottle axis direction has a pair of inclined surfaces that extend radially inward as it moves away from the circumferential center of the column, so that the connecting portion of the pair of inclined surfaces located at the circumferential center of the column tries to displace radially inward when the pressure inside the bottle is reduced, and a circumferential compressive force is applied to the inclined surfaces. This increases the reaction force (restoring force) generated on the inclined surfaces toward the outside in the radial direction, making it possible to suppress deformation of the column. Since both ends of the inclined surface in the bottle axial direction extend away from each other in the bottle axial direction from the circumferential end of the column portion to the circumferential center of the column portion, the size of the inclined surface in the bottle axial direction increases from the circumferential end of the column portion to the circumferential center of the column portion. Therefore, even if the panel surface portion significantly deforms radially inward when the pressure inside the bottle is reduced, stress is not concentrated at the connection portion of the pair of inclined surfaces, and the stress generated on the inclined surfaces is easily dispersed, and it is possible to suppress the end of the column portion in the bottle axial direction from deforming in accordance with the panel surface portion.

[0008] The connection portion of the pair of inclined surfaces, located in the circumferential center of the column portion, may be connected without any step in the bottle axial direction to the outer peripheral surface of the portion of the column portion that is connected to the connection portion in the bottle axial direction.

[0009] Since the connection portion of the pair of inclined surfaces is connected without any steps in the bottle axial direction to the outer peripheral surface of the part of the column portion that is connected to the connection portion in the bottle axial direction, even if the panel surface portion deforms significantly radially inward when the pressure inside the bottle is reduced, it is possible to reliably prevent stress from concentrating at the connection portion of the pair of inclined surfaces. Effect of the Invention

[0010] According to the above aspect of the present invention, when the pressure inside the bottle is reduced, it is possible to suppress deformation of the end of the column portion in the axial direction of the bottle in response to deformation of the panel surface portion. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a side view of a bottle according to one embodiment of the present invention. [Diagram 2] FIG. 2 is an enlarged view showing a part II in FIG. [Diagram 3] FIG. 2 is an enlarged view showing a portion III in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the bottle 1 of this embodiment has a mouth portion 11, a shoulder portion 12, a body portion 13 and a bottom portion 14, and is generally configured such that these portions 11 to 14 are connected together in this order with their respective central axes positioned on a common axis.

[0013] Hereinafter, the common axis will be referred to as the bottle axis O, the mouth 11 side along the bottle axis O will be referred to as the upper side, and the bottom 14 side along the bottle axis O will be referred to as the lower side. Furthermore, the direction that intersects the bottle axis O when viewed from the direction of the bottle axis O will be referred to as the radial direction, and the direction that rotates around the bottle axis O when viewed from the direction of the bottle axis O will be referred to as the circumferential direction.

[0014] The bottle 1 is formed by blow molding a preform formed into a bottomed cylindrical shape by injection molding, and is integrally formed from a synthetic resin material such as polyethylene terephthalate. A cap (not shown) is attached to the mouth 11. The mouth 11, shoulder 12, body 13, and bottom 14 each have a circular cross-sectional shape perpendicular to the bottle axis O. The cross-sectional shape of each of the shoulder portion 12 and the body portion 13 may be, for example, a square shape. The size of the bottle 1 in the direction of the bottle axis O is, for example, 170 mm or more and 275 mm or less. The internal volume of the bottle 1 is, for example, 500 ml or more and 1500 ml or less.

[0015] The shoulder portion 12 extends radially outward from the top to the bottom. The bottom portion 14 is formed in a cup shape, and the peripheral wall of the bottom portion 14 extends radially inward from the top to the bottom. The body 13 is formed in a cylindrical shape extending in the direction of the bottle axis O. A first narrow circumferential groove 13c is formed in the upper edge of the body 13, extending continuously over the entire circumferential length, and a second narrow circumferential groove 13d is formed in the lower edge of the body 13, extending continuously over the entire circumferential length.

[0016] The body 13 is provided with a waist portion 15 that is recessed radially inward and extends continuously over the entire circumferential length. The waist portion 15 is provided in the central portion of the body 13 in the direction of the bottle axis O. The size of the waist portion 15 in the direction of the bottle axis O is, for example, 5% to 15% of the size of the body 13 in the direction of the bottle axis O.

[0017] In the upper body portion 13a located above the waist portion 15 of the body portion 13, a plurality of annular grooves 17 are formed at intervals in the direction of the bottle axis O. The annular grooves 17 are recessed radially inward and extend continuously over the entire circumferential length. Compared to the waist portion 15, the size of each annular groove 17 in the direction of the bottle axis O is smaller, and the amount of recession radially inward is smaller.

[0018] In the lower body portion 13b located below the waist portion 15 of the body portion 13, a plurality of panel surface portions 16 recessed radially inward are formed at intervals in the circumferential direction. In the illustrated example, the panel surface portions 16 have a rectangular shape that is long in the direction of the bottle axis O when viewed from the front from the outside in the radial direction. The panel surface portions 16 are provided in the lower body portion 13b over the entire length in the direction of the bottle axis O between an upper end portion 18 and a lower end portion 19. The upper end portion 18 and the lower end portion 19 of the lower body portion 13b extend linearly in the direction of the bottle axis O in a vertical cross-sectional view along the bottle axis O over the entire length in the circumferential direction, and constitute the maximum outer diameter portion of the bottle 1.

[0019] An upper edge 16a of the opening periphery of the panel surface portion 16 on the outer peripheral surface of the lower body portion 13b is connected without step to an upper end portion 18 of the lower body portion 13b in the direction of the bottle axis O. A lower edge 16b of the opening periphery of the panel surface portion 16 on the outer peripheral surface of the lower body portion 13b is connected without step to a lower end portion 19 of the lower body portion 13b in the direction of the bottle axis O.

[0020] In the lower body portion 13b, a portion between circumferentially adjacent panel surface portions 16 forms a column portion 21. The circumferential size of the column portion 21 is smaller than the circumferential size of the panel surface portion 16. The column portion 21 has a rectangular shape that is long in the direction of the bottle axis O when viewed from the front from the outside in the radial direction.

[0021] In this embodiment, at least one of the two ends of the column portion 21 in the bottle axis O direction is formed with a pair of inclined surfaces 22 that extend radially inward as the distance increases from the circumferential center of the column portion 21 in the circumferential direction. In the illustrated example, the pair of inclined surfaces 22 are provided separately at both ends of the column portion 21 in the bottle axis O direction.

[0022] The connection portion 23 of the pair of inclined surfaces 22, located in the circumferential center of the column portion 21, forms a ridgeline that protrudes radially outward. The connection portion 23 extends straight in the direction of the bottle axis O. In a cross-sectional view perpendicular to the bottle axis O, the pair of inclined surfaces 22 have a mountain shape in which the connection portion 23 forms an apex of a protrusion that protrudes radially outward. In addition, this apex may have, for example, a curved shape or a pointed shape in the cross-sectional view.

[0023] The connection portion 23 of the pair of inclined surfaces 22 is connected without any step in the direction of the bottle axis O to the outer peripheral surface of the portion of the column portion 21 that is connected to the connection portion 23 in the direction of the bottle axis O. The connection portion 23 of the pair of inclined surfaces 22 located at the upper end of the column portion 21 is connected without any step in the direction of the bottle axis O to the outer peripheral surface of the upper end portion 18 of the lower body portion 13b. The connection portion 23 of the pair of inclined surfaces 22 located at the lower end of the column portion 21 is connected without any step in the direction of the bottle axis O to the outer peripheral surface of the lower end portion 19 of the lower body portion 13b.

[0024] 2 and 3, both end edges 22a, 22b of the inclined surface 22 in the bottle axis O direction extend in directions away from each other in the bottle axis O direction from the circumferential end of the column portion 21 toward the circumferential center of the column portion 21. As a result, the inclined surface 22 has a sideways triangular shape when viewed from the front radially outward, with the base coinciding with the connection portion 23 and the apex angle located at the circumferential end of the column portion 21.

[0025] Hereinafter, the upper edge of inclined surface 22 located at the upper end of pillar portion 21 and the lower edge of inclined surface 22 located at the lower end of pillar portion 21 are respectively referred to as the outer edge 22a of inclined surface 22, and the lower edge of inclined surface 22 located at the upper end of pillar portion 21 and the upper edge of inclined surface 22 located at the lower end of pillar portion 21 are respectively referred to as the inner edge 22b of inclined surface 22.

[0026] At the outer edge 22a of the inclined surface 22 and at the inner edge 22b of the inclined surface 22, the respective portions located at the circumferential center of the column portion 21 are connected in the bottle axis O direction via a connecting portion 23. Of the inclined surface 22, the circumferential outer end portion located at the circumferential end portion of the column portion 21 is located radially inward from the outer circumferential edge of the panel surface portion 16. The circumferential outer end portion of the inclined surface 22 and the outer circumferential edge of the panel surface portion 16 are connected via a first connecting surface 24 that extends radially inward from the panel surface portion 16 toward the inclined surface 22 along the circumferential direction.

[0027] At the upper end of the column portion 21, a second connection surface 25 is provided in the portion surrounded by the outer edge 22a of the inclined surface 22, the lower edge of the upper end portion 18 of the lower body portion 13b, and the first connection surface 24, which extends radially inward as it extends downward. At the lower end of the column portion 21, a third connection surface 26 is provided in the portion surrounded by the outer edge 22a of the inclined surface 22, the upper edge of the lower end 19 of the lower body portion 13b, and the first connection surface 24, which extends radially inward as it moves upward.

[0028] The upper end of the column portion 21 has a fourth connection surface 27 that extends radially inward as it extends upward, in the portion surrounded by the inner edge 22b of the inclined surface 22 and the first connection surface 24. At the lower end of the column portion 21, a portion surrounded by the inner edge 22b of the inclined surface 22 and the first connecting surface 24 is provided with a fifth connecting surface 28 which extends radially inward as it extends downward.

[0029] As described above, in the bottle 1 according to this embodiment, at least one of both ends of the column section 21 in the bottle axis O direction has a pair of inclined surfaces 22 that extend radially inward as it moves away from the circumferential center of the column section 21 in the circumferential direction, so that a connecting portion 23 of the pair of inclined surfaces 22 located in the circumferential center of the column section 21 tries to displace radially inward when the pressure inside the bottle 1 is reduced, and a circumferential compressive force is applied to the inclined surface 22. This increases the reaction force (restoring force) generated in the inclined surface 22 toward the outside in the radial direction, and deformation of the column section 21 can be suppressed.

[0030] Since both end edges 22a, 22b of the inclined surface 22 in the bottle axis O direction extend in a direction away from each other in the bottle axis O direction from the circumferential end of the column portion 21 toward the circumferential center of the column portion 21, the size of the inclined surface 22 in the bottle axis O direction increases from the circumferential end of the column portion 21 toward the circumferential center of the column portion 21. Therefore, even if the panel surface portion 16 deforms significantly toward the inside in the radial direction when the pressure inside the bottle 1 is reduced, the stress is not concentrated at the connection portion 23 of the pair of inclined surfaces 22, and the stress generated in the inclined surface 22 is easily dispersed, and the end of the column portion 21 in the bottle axis O direction can be suppressed from deforming in accordance with the panel surface portion 16.

[0031] Since the connection portion 23 of the pair of inclined surfaces 22 is connected without any steps in the direction of the bottle axis O to the outer peripheral surface of the portion of the column portion 21 that is connected to the connection portion 23 in the direction of the bottle axis O, even if the panel surface portion 16 deforms significantly radially inward when the pressure inside the bottle 1 is reduced, stress concentration at the connection portion 23 of the pair of inclined surfaces 22 can be reliably prevented.

[0032] 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.

[0033] For example, the waist portion 15 and the annular groove 17 may not be provided in the torso portion 13 . The dimensions mentioned above may be varied as appropriate.

[0034] In addition, within the scope of the invention, the components in the above-described embodiments may be replaced with well-known components, and the above-described embodiments and variations may be combined as appropriate. [Explanation of symbols]

[0035] 1 bottle 13 Torso 16 Panel surface 21 Column section 22 Slope 22a, 22b both ends 23 Connection O Bottle stem

Claims

1. A cylindrical body portion extending in the bottle axial direction is provided with a plurality of panel surface portions recessed radially inward at intervals in the circumferential direction, and a column portion is formed between adjacent panel surface portions in the circumferential direction, At least one of the two ends of the column portion in the bottle axial direction is provided with a pair of inclined surfaces extending radially inward as it moves away from the circumferential center of the column portion in the circumferential direction, A bottle, wherein both end edges of the inclined surface in the bottle axial direction extend in directions that move away from each other in the bottle axial direction as they move from the circumferential end of the column portion toward the circumferential center of the column portion.

2. 2. The bottle according to claim 1, wherein a connection portion of the pair of inclined surfaces located in a circumferential center portion of the base portion is connected without any step in the bottle axial direction to an outer circumferential surface of a portion of the base portion that is connected to the connection portion in the bottle axial direction.

Images