Square Bottle

Abstract

To suppress buckling deformation.SOLUTION: A trunk part 13 extending in a vertical direction is configured by alternately arranging panel surface parts 15 and 16 and a corner surface part 17 in a circumferential direction along a central axis O of the trunk part, a circumferential groove 21 extending continuously over the entire length in the circumferential direction is formed in a vertical central part of the trunk part, a recessed part 22 for finger contact, which is deeper than the depth of the circumferential groove, is disposed in a part of the circumferential groove located on the panel surface part, in an upper end part of an inner surface defining the circumferential groove, a part located between a finger rest recessed part and a corner surface part that are adjacent to each other in the circumferential direction and a part located in this corner surface part are provided with a horizontal stripe part 23 extending in the circumferential direction, a vertical stripe part 24 extending downward from the horizontal stripe part is disposed between the finger rest recessed part and the corner surfaces part.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Conventionally, as shown in Patent Document 1 below, for example, there has been known a square bottle in which panel surface portions and corner surface portions are alternately arranged in the circumferential direction around the central axis of a vertically extending body portion, a circumferential groove is formed in the vertical center of the body portion that extends continuously over its entire circumferential length, and a finger rest recess that is deeper than the depth of the circumferential groove is disposed in the portion of the circumferential groove that is located on the panel surface portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-204061 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional square bottle described above, when a compressive load is applied in the vertical direction, there was a risk that the weight reduction would make the bottle more susceptible to buckling deformation, for example, such that the portion of the circumferential groove in which the finger rest recess is provided is crushed in the vertical direction, and the panel surface portions among the multiple panel surface portions that do not have the finger rest recess are caused to bulge radially outward.

[0005] Therefore, an object of the present invention is to provide a square bottle that can suppress buckling deformation. [Means for solving the problem]

[0006] In one embodiment of the square bottle of the present invention, a vertically extending body portion is constructed in which panel surface portions and corner surface portions are alternately arranged in a circumferential direction around the central axis of the body portion, a circumferential groove is formed in the vertical center of the body portion, extending continuously over the entire circumferential length, a finger rest recess that is deeper than the depth of the circumferential groove is arranged in a portion of the circumferential groove that is located on the panel surface portion, and at the upper end of the inner surface defining the circumferential groove, a horizontal stripe portion extending in the circumferential direction is provided in a portion located between the finger rest recess and the corner surface portion that are adjacent to each other in the circumferential direction, and in a portion located on this corner surface portion, and vertical stripes extending downward from the horizontal stripe portion are arranged in the portions located between these finger rest recesses and the corner surface portions.

[0007] At the upper end of the inner surface of the circumferential groove, a horizontal stripe extending in the circumferential direction is provided in the portion located between the finger rest recess and the corner surface portion that are adjacent to each other in the circumferential direction, as well as in the portion located on this corner surface portion (hereinafter these are collectively referred to as the "step portion").Therefore, when a compressive load is applied to the square bottle in the vertical direction, the horizontal stripe portion can be compressed and deformed in the vertical direction, thereby alleviating the stress generated in the step portion and making the step portion less likely to become a starting point for buckling deformation. A vertical stripe extending downward from the horizontal stripe is arranged in the portion located between the finger rest recess and the corner surface portion which are adjacent to each other in the circumferential direction. Therefore, when a compressive load is applied to the square bottle in the vertical direction, the stress generated in the step portion can be transmitted to the panel surface portion via the horizontal stripe and vertical stripe, thereby suppressing the stress. As a result, buckling deformation can be suppressed.

[0008] A tip portion of the horizontal stripe portion opposite to the vertical stripe portion may be located on the corner surface portion adjacent to the vertical stripe portion in the circumferential direction.

[0009] Since the tip of the horizontal stripe opposite the vertical stripe is located at the corner surface portion circumferentially adjacent to the vertical stripe, it is possible to ensure rigidity against vertical compressive loads at the end of both circumferential ends of this corner surface opposite the vertical stripe, and the buckling strength of the square bottle can be ensured.

[0010] A portion located between the finger rest recess and the corner surface portion adjacent to each other in the circumferential direction may extend radially inward along the circumferential direction from the corner surface portion toward the finger rest recess.

[0011] The portion located between the finger rest recess and the corner surface portion that are adjacent to each other in the circumferential direction extends radially inward from the corner surface portion along the circumferential direction toward the finger rest recess. This makes it possible to increase the rigidity of this portion against vertical compressive loads, and buckling deformation can be reliably suppressed.

[0012] A lower portion of the vertical strip may extend in a direction away from the finger rest recess in the circumferential direction as it extends downward.

[0013] As the lower part of the vertical strip extends downward, it extends circumferentially away from the finger rest recess, so that the stress generated in the step when a compressive load is applied in the vertical direction to the square bottle can be transmitted over a wide area at both circumferential ends of the panel surface, thereby reliably suppressing it.

[0014] The vertical stripe may be located on the same panel surface over its entire length.

[0015] Since the vertical stripe is located on the same panel surface along its entire length, it is possible to ensure rigidity against vertical compressive loads at the end on the vertical stripe side of both circumferential ends of the corner surface portion circumferentially adjacent to the vertical stripe, thereby ensuring the buckling strength of the square bottle. Effect of the Invention

[0016] According to the present invention, buckling deformation can be suppressed. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a side view of a square bottle shown as one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, a square bottle according to one embodiment will be described with reference to the drawings. As shown in FIG. 1, the square bottle 10 is configured with a mouth 11, a shoulder 12, a body 13, and a bottom 14 arranged coaxially with a bottle axis O extending in the vertical direction, and connected together in this order from top to bottom. Hereinafter, the direction intersecting the bottle axis O when viewed from the top-bottom direction will be referred to as the radial direction, and the direction going around the bottle axis O will be referred to as the circumferential direction.

[0019] The square bottle 10 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 or polypropylene. A cap (not shown) is attached to the mouth portion 11. The internal volume of the square bottle 10 is sized to be filled with, for example, 200 ml to 4000 ml of liquid. In the illustrated example, the internal volume of the square bottle 10 is sized to be filled with 2000 ml of liquid.

[0020] The body 13 extends in the vertical direction and is configured with panel surface portions 15, 16 and corner surface portions 17 arranged alternately in the circumferential direction, and has a rectangular shape in a cross section perpendicular to the bottle axis O. The panel surface portions 15, 16 and the corner surface portion 17 are connected in the circumferential direction via connecting portions formed in a curved surface shape protruding radially outward.

[0021] Each of the panel surfaces 15, 16 extends substantially straight in the cross section. However, each of the panel surfaces 15, 16 may have a curved shape that is convex toward the outside in the radial direction in the cross section. The corner surface portion 17 connects the circumferential ends of the circumferentially adjacent panel surface portions 15, 16. The corner surface portion 17 has a width in the circumferential direction and is formed in a band shape extending in the up-down direction. Each corner surface portion 17 extends almost straight in the cross section. The width of each corner surface portion 17 is smaller than the circumferential size of each panel surface portion 15, 16. Each corner surface portion 17 may have a curved shape that is convex toward the radially outward side in the cross section.

[0022] The body 13 has a rectangular shape in the cross section, and is configured by a first panel surface portion 15 forming a long side and a second panel surface portion 16 forming a short side, which are connected in the circumferential direction via a corner surface portion 17. The body 13 may have a square shape in the cross section. In the illustrated example, the circumferential size of the second panel surface portion 16 is longer than half the circumferential size of the first panel surface portion 15. Like the body portion 13, the shoulder portion 12 and the bottom portion 14 also have a rectangular shape in cross section.

[0023] The two first panel surface portions 15 face each other in the radial direction, sandwiching the bottle axis O. The shapes of the two first panel surface portions 15 are identical to each other. The two second panel surface portions 16 face each other in the radial direction, sandwiching the bottle axis O. The shapes of the two second panel surface portions 16 are identical to each other. The shapes of the first panel surface portions 15 and the second panel surface portions 16 are different from each other.

[0024] Here, the two first panel surfaces 15 having the same shape means not only that the outer edge shapes of the two first panel surfaces 15 are the same, but also that the shapes as viewed from the whole, including the depressions formed on the outer circumferential surfaces, are the same. The same is true for the two second panel surfaces 16.

[0025] A circumferential groove 21 is formed in the vertical center of the body 13, and extends continuously over the entire circumferential length. A finger rest recess 22 that is deeper than the circumferential groove 21 is provided in a portion of the circumferential groove 21 that is located on the first panel surface portion 15. The finger rest recess 22 is provided in the central portion of the first panel surface portion 15. The finger rest recess 22 has a rectangular shape that is long in the circumferential direction when viewed from the front from the outside in the radial direction. The finger rest recess 22 is provided in the portion of the circumferential groove 21 that is located on the first panel surface portion 15, over the entire circumferential length excluding both circumferential ends. A portion of the bottom surface of the circumferential groove 21 that is located on the corner surface portion 17 extends radially outward as it goes downward.

[0026] In this embodiment, at the upper end of the inner surface defining the circumferential groove 21, a horizontal strip portion 23 extending in the circumferential direction is provided in a portion located between the finger rest recess 22 and the corner surface portion 17 which are adjacent to each other in the circumferential direction, as well as in a portion located on this corner surface portion 17.

[0027] A vertical stripe 24 extending downward from the horizontal stripe 23 is disposed in a portion between the finger rest recess 22 and the corner surface 17 adjacent to each other in the circumferential direction. The portion between the finger rest recess 22 and the corner surface 17 adjacent to each other in the circumferential direction extends radially inward from the corner surface 17 toward the finger rest recess 22 along the circumferential direction. The vertical stripe 24 is separated from the corner surface 17 in the circumferential direction and is close to the finger rest recess 22 in the circumferential direction. The vertical stripe 24 and the horizontal stripe 23 are formed in a hollow protruding shape. The vertical stripe 24 extends downward from the end of the horizontal stripe 23 on the finger rest recess 22 side, out of both circumferential ends.

[0028] The tip 23a of the horizontal stripe 23 on the opposite side to the vertical stripe 24 is located at the corner surface 17 adjacent to the vertical stripe 24 in the circumferential direction. In other words, the tip 23a of the horizontal stripe 23 does not reach the second panel surface 16. The tip 23a of the horizontal stripe 23 is formed so that its width becomes narrower and its protruding amount becomes smaller as it moves away from the vertical stripe 24 in the circumferential direction. In addition, the tip portion 23a of the horizontal strip portion 23 may reach the second panel surface portion 16, circumferentially beyond the corner surface portion 17 that is adjacent to the vertical strip portion 24 in the circumferential direction.

[0029] The lower portion 24b of the vertical stripe 24 extends in a circumferential direction away from the finger rest recess 22 as it extends downward. The upper portion of the vertical stripe 24 extends straight in the up-down direction. The connection portion between the vertical stripe 24 and the horizontal stripe 23 extends in a circumferential direction away from the finger rest recess 22 as it extends upward. The vertical stripe 24 is located on the same first panel surface portion 15 throughout its entire length. The lower end portion 24a of the vertical stripe 24 is formed so that it becomes narrower and protrudes less as it extends downward. The lower end 24a of the vertical strip portion 24 may extend beyond the first panel surface portion 15 in the circumferential direction and reach the corner surface portion 17.

[0030] The upper end of the finger rest recess 22 is located below the upper end of the horizontal stripe 23 and above the lower end of the horizontal stripe 23. The lower end of the finger rest recess 22 is located above the lower end 24a of the vertical stripe 24 and below the upper part of the vertical stripe 24. The vertical positions of the upper and lower ends of the finger rest recess 22 relative to the horizontal stripes 23 and the vertical stripes 24 are not limited to the example shown in the figure and may be changed as appropriate.

[0031] As described above, in the square bottle 10 of this embodiment, the upper end of the inner surface of the circumferential groove 21 has a horizontal stripe 23 extending circumferentially in a portion located between the finger rest recess 22 and the corner surface 17 that are adjacent to each other in the circumferential direction, as well as in a portion located on this corner surface 17 (hereinafter these are collectively referred to as the "step portion"). Therefore, when a compressive load is applied to the square bottle 10 in the vertical direction, the horizontal stripe 23 can be compressed and deformed in the vertical direction, thereby alleviating the stress generated in the step portion and making the step portion less likely to become a starting point for buckling deformation. A vertical stripe portion 24 extending downward from the horizontal stripe portion 23 is arranged in the portion located between the finger rest recess 22 and the corner surface portion 17 which are adjacent to each other in the circumferential direction. Therefore, when a compressive load is applied in the vertical direction to the square bottle 10, the stress generated in the step portion can be transmitted to the first panel surface portion 15 via the horizontal stripe portion 23 and the vertical stripe portion 24, and thereby suppressed. As a result, buckling deformation can be suppressed.

[0032] Since the tip portion 23a of the horizontal stripe portion 23 opposite the vertical stripe portion 24 is located at the corner surface portion 17 circumferentially adjacent to the vertical stripe portion 24, it is possible to ensure rigidity against vertical compressive loads at the end portion opposite the vertical stripe portion 24 of both circumferential ends of this corner surface portion 17, and the buckling strength of the square bottle 10 can be ensured.

[0033] Since the portion located between the finger rest recess 22 and the corner surface portion 17 that are adjacent to each other in the circumferential direction extends radially inward as it moves circumferentially from the corner surface portion 17 toward the finger rest recess 22, it is possible to increase the rigidity of this portion against vertical compressive loads, and buckling deformation can be reliably suppressed.

[0034] Since the lower portion 24b of the vertical strip portion 24 extends circumferentially away from the finger rest recess 22 as it extends downward, the stress generated in the step portion when a compressive load is applied in the vertical direction to the square bottle 10 can be transmitted over a wide range at both circumferential ends of the first panel surface portion 15, and can be reliably suppressed.

[0035] Since the vertical stripe 24 is located on the same first panel surface portion 15 along its entire length, it is possible to ensure rigidity against vertical compressive loads at the end portion on the vertical stripe 24 side of each of the two circumferential ends of the corner surface portion 17 circumferentially adjacent to the vertical stripe 24, and the buckling strength of the square bottle 10 can be ensured.

[0036] 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.

[0037] For example, the vertical stripe portion 24 may be spaced apart from the finger rest recess 22 in the circumferential direction and adjacent to the corner surface portion 17 in the circumferential direction. The lower portion 24b of the vertical strip 24 may extend straight in the vertical direction.

[0038] 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 the above-described variations may be combined as appropriate. [Explanation of symbols]

[0039] 10 Square Bottle 13 Torso 15, 16 Panel surface 17 Corner surface 21 Circumferential groove 22 Finger rest recess 23 Horizontal section 23a Tip of the transverse stripe 24 Longitudinal region 24a Lower end of longitudinal stripe 24b Lower part of longitudinal stripe O Bottle axis (center axis)

Claims

1. The body portion extending in the vertical direction is configured such that the panel surface portions and the corner surface portions are alternately arranged in a circumferential direction around a central axis of the body portion, A circumferential groove is formed in the vertical center of the body portion, the circumferential groove extending continuously over the entire length of the body portion in the circumferential direction, a finger rest recess that is deeper than the depth of the circumferential groove is disposed in a portion of the circumferential groove that is located on the panel surface portion; a horizontal stripe portion extending in a circumferential direction is provided at an upper end of an inner surface that defines the circumferential groove, in a portion located between the finger rest recess and the corner surface portion adjacent to each other in the circumferential direction, and in a portion located on the corner surface; A vertical stripe extending downward from the horizontal stripe is disposed in the portion located between the finger rest recess and the corner surface of the square bottle.

2. The square bottle according to claim 1 , wherein the tip portion of the horizontal stripe portion opposite the vertical stripe portion is located on the corner surface portion adjacent to the vertical stripe portion in the circumferential direction.

3. A square bottle as described in claim 1 or 2, wherein a portion located between the finger rest recess and the corner surface portion adjacent to each other in the circumferential direction extends radially inward from the corner surface portion toward the finger rest recess along the circumferential direction.

4. The square bottle according to claim 1 , wherein a lower portion of the vertical strip extends in a direction away from the finger rest recess in the circumferential direction as it extends downward.

5. The square bottle according to claim 4, wherein the vertical stripe is located on the same panel surface portion over its entire length.

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