JP2019112096A - Square bottle - Google Patents

Abstract

To secure rigidity of a shoulder part having a shoulder panel part in which an intermediate ridge line part is formed.SOLUTION: In a square bottle 1, a mouth part 11, a shoulder part 12, a trunk part 13 and a bottom part 14 are continuously provided in this order from the upper part to the lower part along a bottle axis O direction. At least in the shoulder part and the trunk part, a panel surface part 15 and a corner surface part 16 are alternately and continuously provided in the circumferential direction around the bottle axis via a partition ridge line part 17. Out of the shoulder part, in the central part in the circumferential direction of a shoulder panel part 12a located at the panel surface part, an intermediate ridge line part 21 is formed extending in the bottle axis direction when viewed from the outside in the radial direction. At the shoulder panel part, a lateral groove 23 is formed crossing the intermediate ridge line part and extending in the circumferential direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a square bottle.

  Conventionally, as shown in, for example, Patent Document 1 below, a mouth, a shoulder, a body, and a bottom are continuously provided in this order from the top to the bottom along the axial direction of the bottle. The panel surface portion and the corner surface portion are alternately connected in the circumferential direction around the bottle axis via the dividing ridge line portion, and the circumferential center of the shoulder panel portion located on the panel surface portion among the shoulder portions There is known a square bottle in which a center ridge line portion extending in the axial direction of the bottle is formed as viewed from the outside in the radial direction.

Patent No. 5014636

  However, in the above-mentioned conventional square bottle, there is a possibility that the midline portion may be unrecoverably bent at the time of depressurization or when an external force is applied to the shoulder. This problem is manifested when the square bottle is thin.

  The present invention has been made in consideration of such circumstances, and it is an object of the present invention to provide a square bottle capable of securing the rigidity of a shoulder portion having a shoulder panel portion in which a center ridge portion is formed.

  In order to solve the above problems and achieve such an object, in the square bottle of the present invention, the mouth, the shoulder, the body, and the bottom are directed from the top to the bottom along the axial direction of the bottle. The shoulder portion and the body portion are sequentially provided in series, and at least the shoulder portion and the body portion are alternately provided in the circumferential direction around the bottle axis via the dividing ridge line portion, and the shoulder portion A square bottle in which a center line portion extending in the axial direction of the bottle as viewed from the outside in the radial direction is formed at a circumferential central portion of a shoulder panel portion located in the panel surface portion; A lateral groove extending in the circumferential direction is formed so as to intersect the midline portion.

According to the present invention, the shoulder panel portion is formed with the lateral groove extending in the circumferential direction so as to intersect the midline portion, thereby making it possible to enhance the rigidity in the radial direction of the shoulder panel portion. Even if it is bent, it can be easily restored and deformed.
In addition, since the lateral grooves do not straddle the section ridge line in the circumferential direction, and are arranged only in the shoulder panel portion among the shoulders, forming the lateral grooves in the shoulders lowers the buckling strength. You can prevent.

Here, the lateral groove may be disposed at a central portion in the bottle axial direction of the shoulder panel portion.
In this case, since the lateral groove is disposed at the axially central portion of the shoulder panel, the rigidity of the shoulder panel can be enhanced over the entire area.

Further, the lateral groove may be formed in the shoulder panel portion having the longest circumferential length among the plurality of shoulder panel portions.
In this case, since the lateral groove is formed in the shoulder panel portion which is the longest in the circumferential direction among the plurality of shoulder panel portions and it is difficult to secure the rigidity in the radial direction, the rigidity of the shoulder portion is effectively enhanced. be able to.

  According to the present invention, it is possible to secure the rigidity of the shoulder portion having the shoulder panel portion in which the center ridge portion is formed.

It is a front view of a square bottle shown as one embodiment concerning the present invention. It is a side view of a square bottle shown as one embodiment concerning the present invention. It is the sectional view on the AA line arrow of the square bottle shown in FIG.

Hereinafter, a square bottle 1 according to an embodiment of the present invention will be described with reference to the drawings.
The square bottle 1 is configured such that a mouth 11, a shoulder 12, a body 13, and a bottom 14 are continuously provided in this order from the top to the bottom along the bottle axis O direction.
Hereinafter, in a plan view seen from the bottle axis O direction, a direction intersecting the bottle axis O is referred to as a radial direction, and a direction circling around the bottle axis O is referred to as a circumferential direction.
The square bottle 1 is integrally formed of, for example, a synthetic resin material such as polyethylene terephthalate or polypropylene. The square bottle 1 is formed by, for example, biaxial stretch blow molding or the like.

  In the square bottle 1, at least the shoulder portion 12 and the body portion 13 are configured such that the panel surface portion 15 and the corner surface portion 16 are alternately and continuously provided in the circumferential direction via the dividing ridge line portion 17. The panel surface portion 15 is wider than the corner surface portion 16 in the circumferential direction. In FIGS. 1 and 2, the hatched portion indicates the panel surface portion 15.

  Four panel surface portions 15 and four corner surface portions 16 are provided, and the panel surface portion 15 includes two first panel surface portions 15 a and two second panel surface portions 15 b narrower than the first panel surface portions 15 a. Then, the two first panel surface parts 15a are disposed to face each other with the bottle axis O interposed in the radial direction, and the two second panel surface parts 15b are also disposed to face each other with the bottle axis O interposed in the radial direction. It is done. All four corner surface portions 16 are narrower than the second panel surface portion 15b. The widths of the four corner surface portions 16 are equal to one another. The four corner surface portions 16 are arranged at equal intervals in the circumferential direction.

  Here, an annular concave rib 13 a extending over the entire circumference is formed at a central portion of the body portion 13 in the bottle axis O direction. Then, in each of the panel surface portions 15 in the trunk portion 13, a pressure reduction absorption panel portion 15c is separately formed in a portion located above the annular concave rib 13a and a portion located below the annular concave rib 13a.

Of the upper end portion of the body portion 13, a portion positioned at the corner surface portion 16 is a first tapered surface portion 16a that extends gradually inward in the radial direction as it goes upward. The inclination angle of the first tapered surface portion 16 a with respect to the bottle axis O is smaller than the inclination angle of the shoulder 12 with respect to the bottle axis O.
Of the lower end portion of the body portion 13, a portion positioned at the corner surface portion 16 is a second tapered surface portion 16b which gradually extends outward in the radial direction as it goes upward.

  The first tapered surface portion 16 a is formed with a recess 18 that is recessed inside the square bottle 1. In the illustrated example, the recess 18 is formed in all four first tapered surface portions 16a. The recess 18 is an annular groove in which one groove is annularly connected so that the outer peripheral edge thereof extends along the outer edge of the first tapered surface portion 16a. The planar view of the recess 18 is substantially the same as the outer shape of the first tapered surface portion 16a, and is disposed inside the outer edge of the first tapered surface portion 16a. Furthermore, the concave portion 18 is disposed apart from the dividing ridge portion 17, and a gap is provided between the concave portion 18 and the dividing ridge line portion 17 in the first tapered surface portion 16a, so that a smooth surface portion is formed. It is assumed.

  Here, in the present embodiment, the middle ridge line 21 extending in the bottle axis O direction as viewed from the outside in the radial direction at the circumferential center of the shoulder panel 12a located on the panel surface 15 in the shoulder 12 It is formed. In the shoulder panel portion 12a, portions continuous with the midline portion 21 from both sides in the circumferential direction gradually extend outward in the radial direction along the circumferential direction toward the midline portion 21, and the midline portion 21 has a square shape It is pointed toward the outside of the bottle 1. The midline portion 21 is disposed along the entire length of the shoulder portion 12 in the bottle axis O direction. The midline portion 21 is formed on all of the plurality of shoulder panel portions 12a. One middle ridge line portion 21 is disposed in one shoulder panel portion 12a.

  In the example of illustration, the valley line part 22 arrange | positioned by pair so that the center ridge line part 21 may be pinched from the both sides of the circumferential direction is formed in the shoulder panel part 12a. In the shoulder panel portion 12a, portions continuous with the valley ridge line 22 from both sides in the circumferential direction gradually extend inward in the radial direction toward the valley ridge line 22 along the circumferential direction, and the valley ridge line 22 has a square shape It is pointed toward the inside of the bottle 1. The valley portion 22 is disposed over the entire length of the shoulder 12 in the bottle axis O direction. The valley line portion 22 is located radially inward of the middle ridge line portion 21 and the section ridge line portion 17.

  The valley line portion 22 may not be formed on the shoulder panel portion 12a. Further, in the shoulder panel portion 12a, a portion positioned on the outer side in the circumferential direction from the center ridge line portion 21 may be formed in a concave surface shape recessed toward the inside of the square bottle 1, or formed in an inclined plane shape May be

  Further, in the present embodiment, the shoulder panel portion 12a is formed with a lateral groove 23 extending in the circumferential direction so as to intersect the center ridge line portion 21. In the illustrated example, the lateral grooves 23 are respectively formed in a pair of shoulder panel portions 12 a positioned on both sides of the plurality of shoulder panel portions 12 a that radially sandwich the bottle axis O. The lateral groove 23 intersects the middle ridge line 21 and the pair of valley lines 22. In addition, you may employ | adopt the horizontal groove 23 which does not cross the valley line part 22. FIG.

  The circumferential center portions of the lateral groove 23 and the shoulder panel 12a coincide with each other. The lateral groove 23 is disposed at the center of the shoulder panel 12a in the bottle axis O direction. The lateral groove 23 is formed in the shoulder panel portion 12a located in the first panel surface portion 15a having the longest circumferential length among the plurality of shoulder panel portions 12a. The groove width of the lateral groove 23 is narrower than the groove width of the annular concave rib 13a. The depth of the lateral groove 23 is, for example, 0.3 mm to 0.5 mm.

The lateral groove 23 includes an inner groove 23a positioned at an intermediate portion in the circumferential direction, and a pair of outer grooves 23b positioned on both sides in the circumferential direction.
The middle groove 23 a straddles the middle ridge line portion 21 in the circumferential direction and connects the pair of valley line portions 22 with each other. The groove width of the middle groove 23a is equal over the entire length in the circumferential direction. The groove bottom of the inner groove 23a extends gradually outward in the radial direction from the outer side toward the inner side in the circumferential direction, and at the circumferential center portion of the inner groove 23a, the bottle axis O direction seen from the outer side in the radial direction The ridge line part which extends to is formed.

  As the middle groove 23a, the groove bottom may be flat over the entire length in the circumferential direction. The middle groove 23a may straddle the valley portion 22 in the circumferential direction. The middle groove 23a may be separated from the valley portion 22 in the circumferential direction. In addition, the middle groove 23 a may reach the section ridge line portion 17.

  The outer groove 23 b connects the valley line portion 22 and the section ridge line portion 17 adjacent to the valley line portion 22 in the circumferential direction. The outer groove 23 b does not straddle the section ridge line portion 17 in the circumferential direction, and is positioned only at the shoulder panel portion 12 a of the shoulder portion 12. The groove width of the outer groove 23b is gradually narrowed as it goes from the valley line portion 22 side to the division ridge line portion 17 side. The outer groove 23b gradually extends downward as it goes from the valley line 22 side to the section ridge line 17 side.

  Note that, as the lateral groove 23, a configuration without the outer groove 23b may be adopted. Further, the outer groove 23 b may straddle the valley line portion 22 in the circumferential direction. Further, the outer groove 23 b may be separated from the valley portion 22 in the circumferential direction. In addition, the outer groove 23 b may be separated from the dividing ridge portion 17 in the circumferential direction.

As described above, according to the square bottle 1 according to the present embodiment, the shoulder panel 12a is formed with the lateral groove 23 extending in the circumferential direction so as to intersect the center ridge line 21, so the diameter of the shoulder panel 12a It becomes possible to increase the rigidity of the direction, and even if the middle ridge portion 21 is bent, it can be easily restored and deformed.
Further, since the lateral groove 23 does not straddle the dividing ridge line portion 17 in the circumferential direction, and is disposed only on the shoulder panel portion 12 a of the shoulder portion 12, the lateral groove 23 is formed on the shoulder portion 12 to obtain buckling strength. Can be prevented from falling.

Further, since the lateral groove 23 is disposed at the center of the shoulder panel 12a in the bottle axis O direction, the rigidity of the shoulder panel 12a can be enhanced over the entire area.
Further, since the lateral groove 23 is formed in the shoulder panel portion 12a which is the longest in the circumferential direction among the plurality of shoulder panel portions 12a and which hardly secures the rigidity in the radial direction, the rigidity of the shoulder portion 12 is effective. Can be enhanced.

  The present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the scope of the invention.

For example, in the embodiment described above, the configuration in which the recess 18 is formed in the first tapered surface portion 16a is shown, but a square bottle without the recess 18 may be employed.
Further, the lateral groove 23 may be formed in the shoulder panel portion 12a located on the second panel surface portion 15b among the plurality of shoulder panel portions 12a.

The synthetic resin material forming the square bottle 1 may be appropriately changed, for example, polyethylene terephthalate, polyethylene naphthalate, amorphous polyester, etc., or a blend material thereof.
Furthermore, the square bottle 1 may be a laminated structure having an intermediate layer as well as a single layer structure. Examples of the intermediate layer include a layer made of a resin material having a gas barrier property, a layer made of a regenerating material, a layer made of a resin material having an oxygen absorbability, a combination of these layers, a vapor deposited layer and the like.

  In addition, it is possible to replace the components in the above-described embodiment with known components as appropriate without departing from the spirit of the present invention, and the above-described modifications may be combined as appropriate.

DESCRIPTION OF SYMBOLS 1 square bottle 11 opening part 12 shoulder part 12a shoulder panel part 13 trunk | drum 14 bottom part 15 panel surface part 16 corner surface part 17 division ridge line part 21 middle ridge line part 23 horizontal groove O bottle axis

Claims (3)

A mouth, a shoulder, a body, and a bottom are continuously provided in this order from the top to the bottom along the axial direction of the bottle;
At least the shoulder portion and the body portion are configured such that the panel surface portion and the corner surface portion are alternately provided in the circumferential direction around the bottle axis via the dividing ridge line portion,
In the rectangular bottle, a center line portion extending in the axial direction of the bottle is formed at a circumferential center portion of the shoulder panel portion located on the panel surface portion among the shoulder portions, as viewed from the outer side in the radial direction.
The shoulder panel portion is formed with a lateral groove extending in the circumferential direction so as to intersect the centerline portion.   The square bottle according to claim 1, wherein the lateral groove is disposed at a central portion in an axial direction of the bottle in the shoulder panel portion.   The square bottle according to claim 1 or 2, wherein the lateral groove is formed in the shoulder panel portion having the longest circumferential length among the plurality of shoulder panel portions.

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