JP5835909B2 - Bottle - Google Patents

Description

  The present invention relates to a bottle.

Conventionally, as a bottle formed into a bottomed cylindrical shape with a synthetic resin material, for example, as shown in Patent Document 1 below, a mouth portion, a shoulder portion, a trunk portion, and a bottom portion are integrally formed. A configuration is known in which a plurality of panel portions that are recessed toward the inside in the radial direction are formed at intervals in the circumferential direction.
In this bottle, for example, when the temperature of the sealed contents is lowered and the inside is depressurized, the decompression is absorbed by the panel portion preferentially deforming inward in the radial direction.

JP 2011-31899 A

  However, in the said conventional bottle, there was room for improvement in improving the rigidity with respect to the radial direction of the column part located between panel parts adjacent in the circumferential direction among trunk | drums.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a bottle capable of improving the rigidity of the column portion in the radial direction.

In order to solve the above-described problems and achieve such an object, the bottle of the present invention is formed with a plurality of panel portions that are recessed toward the inside in the radial direction in the body portion at intervals in the circumferential direction. Between the adjacent panel portions in the circumferential direction as a column portion, and the panel portion includes a bottom wall portion located radially inside and an outer peripheral edge of the bottom wall portion. A side wall portion extending outward in the radial direction, and of the side wall portions, the vertical side wall portions that are located on both sides of the bottom wall portion in the circumferential direction and are continuous with the column portion in the circumferential direction are In the cross-sectional view of the part, as it goes from the radially outer side to the inner side, the central part in the circumferential direction of the column part connected to the vertical side wall part gradually goes to the inner side of the column part connected to the vertical side wall part. inclined with respect to a virtual line connecting the bottle axis, an outer peripheral surface facing the pillar portion, the outer radial , Characterized in that has a smooth surface over the entire area.

According to the present invention, the vertical side wall portion extends in parallel with the imaginary line in the cross-sectional view of the trunk portion, or gradually, the inner side of the column portion connected to the vertical side wall portion gradually toward the inner side from the outer side in the radial direction. Since the inside of the bottle is depressurized and the bottom wall portion is displaced toward the inner side in the radial direction, the vertical side wall portion is the outer end portion in the radial direction. Around, it will be displaced so that it may go to the inner side of the column part which the said vertical side wall part continues.
Therefore, at the time of decompression in the bottle, the vertical side wall portion is inclined more largely with respect to the imaginary line as described above, so that a pair of vertical side wall portions that are continuously connected to the column portion from both sides in the circumferential direction are respectively provided. The inner ends in the radial direction can be squeezed and displaced in the circumferential direction so that they approach each other in the circumferential direction.
Thereby, the rigidity with respect to the radial direction of the column part is enhanced, and for example, when the bottle is depressurized or when an external force is applied, the occurrence of folding or buckling of the column part inward in the radial direction is suppressed. it can.

  According to the present invention, the rigidity of the pillar portion in the radial direction can be improved.

It is a side view of the bottle shown as one embodiment concerning the present invention. It is AA arrow sectional drawing of the bottle shown in FIG. FIG. 3 is a schematic view of a part of the bottle shown in FIG. 2 during decompression.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the bottle 1 according to this embodiment includes a mouth portion 11, a shoulder portion 12, a trunk portion 13, and a bottom portion 14, and these 11 to 14 are positioned on a common axis with their respective central axes. In this state, it is a schematic configuration that is continuously arranged in this order.
Hereinafter, the above-described common axis is referred to as the bottle axis O, the mouth 11 side along the bottle axis O direction is referred to as the upper side, the bottom 14 side is referred to as the lower side, and the direction orthogonal to the bottle axis O is referred to as the radial direction. The direction around the bottle axis O is called the circumferential direction.

  The bottle 1 is formed by blow-molding a preform formed into a bottomed cylinder by injection molding, and is integrally formed of a synthetic resin material. A cap (not shown) is screwed into the mouth portion 11. Each of the mouth portion 11, the shoulder portion 12, the body portion 13, and the bottom portion 14 has a circular cross-sectional shape orthogonal to the bottle axis O. In the upper end portion of the body portion 13 in the bottle axis O direction, a concave groove 16 that is recessed toward the inner side in the radial direction is formed continuously over the entire circumference.

A plurality of panel portions 17 that are recessed toward the inside in the radial direction are formed in the body portion 13 at intervals in the circumferential direction. And in the trunk | drum 13, the part located between the panel parts 17 adjacent in the circumferential direction becomes the pillar part 19 extended along the bottle axis | shaft O direction. That is, the body portion 13 is provided with concave panel portions 17 and convex column portions 19 alternately arranged in the circumferential direction.
The panel part 17 has the bottom wall part 21 located in the radial inside, and the side wall part 22 extended toward the outer side of radial direction from the outer periphery of this bottom wall part 21. As shown in FIG.
In the illustrated example, the panel portion 17 has a rectangular shape that is long in the bottle axis O direction when viewed from the outside in the radial direction.

  The bottom wall portion 21 has a trapezoidal shape that gradually decreases in size in the bottle axis O direction from the outer side in the circumferential direction when viewed from the outer side in the radial direction. A pair of first surfaces 21a in which the inner edges in the circumferential direction are connected to each other at the portion, a longitudinal groove 21b formed in the inner end portion in the circumferential direction of each first surface 21a and extending in the bottle axis O direction, and a pair of first surfaces A second surface 21c having a triangular shape which is located between the outer ends of the one surface 21a in the bottle axis O direction and gradually decreases in size in the circumferential direction from the outside toward the inside in the bottle axis O direction; The outer circumferential edge of the first surface 21a and the annular groove 21d that connects the outer circumferential edge of the second surface 21c in the bottle axis O direction to the side wall portion 22 are provided. In addition, the outer edge in the circumferential direction on the first surface 21a and the outer edge in the bottle axis O direction on the second surface 21c are continuous with each other, and are long rectangles in the bottle axis O direction when viewed from the outside in the radial direction. It has a shape.

The side wall portions 22 are located on both sides of the bottom wall portion 21 in the circumferential direction, connect the bottom wall portion 21 and the column portion 19 in the circumferential direction, and the bottom wall portion 21 in the bottle axis O direction. And lateral wall portions 26 located on both sides.
The side wall portion 26 is an inclined surface that gradually extends from the inner side to the outer side in the bottle axis O direction as it goes from the inner side to the outer side in the radial direction. Thereby, the distance of the pair of side wall parts 26 located in the both sides of the bottle axis | shaft O direction in the bottom wall part 21 becomes large gradually as it goes to an outer side from the inner side of radial direction.

And in this embodiment, the vertical side wall part 25 is the center part of the circumferential direction in the column part 19 which the said vertical side wall part 25 continues in the cross sectional view of this trunk | drum 13, as shown in FIG. It extends in parallel with an imaginary line L connecting O. Thereby, the space | interval of the circumferential direction of a pair of vertical side wall part 25 connected with the pillar part 19 from the both sides of the circumferential direction is equal over the whole radial direction.
The vertical side wall portion 25 is connected to the column portion 19 via a projecting curved surface portion that protrudes toward the outside of the trunk portion 13 in the cross-sectional view of the trunk portion 13, and to the bottom wall portion 21. 13 are connected via a concave curved surface portion that is recessed toward the inner side of 13.

  When the inside of the bottle 1 is depressurized, as shown in FIG. 3, the bottom wall portion 21 is directed radially inward with the connection portion between the bottom wall portion 21 and the side wall portion 22 in the panel portion 17 as the center. Will be displaced. Accordingly, by deforming the bottom wall portion 21 of the panel portion 17 preferentially at the time of decompression in the bottle 1, the inside of the bottle 1 is not accompanied by deformation at other portions such as the column portion 19 and the shoulder portion 12, for example. Can be absorbed.

As described above, according to the bottle 1 according to the present embodiment, since the vertical side wall portion 25 extends in parallel with the imaginary line L in the cross-sectional view of the body portion 13, the inside of the bottle 1 is decompressed. When the bottom wall portion 21 is displaced toward the inside in the radial direction, the vertical side wall portion 25 is directed to the inside of the column portion 19 connected to the vertical side wall portion 25 around the outer end portion in the radial direction. Will be displaced.
Therefore, when the pressure in the bottle 1 is reduced, the vertical side wall portion 25 is gradually inclined with respect to the imaginary line L so as to gradually go to the inner side of the column portion 19 connected to the vertical side wall portion 25 as it goes from the outer side to the inner side in the radial direction. By doing so, the pair of vertical side wall portions 25 respectively connected to the column portion 19 from both sides in the circumferential direction are squeezed and displaced in the circumferential direction so that the respective inner end portions in the radial direction approach each other in the circumferential direction. It becomes possible.
Thereby, the rigidity with respect to the radial direction of the column part 19 is enhanced, and for example, when the bottle 1 is depressurized or when an external force is applied, the occurrence of folding or buckling of the column part 19 in the radial direction is suppressed. can do.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, in the above-described embodiment, the vertical side wall portion 25 is configured to extend in parallel with the virtual line L in the cross-sectional view of the body portion 13, but instead, for example, from the radially outer side to the inner side. You may make it incline with respect to the said imaginary line L so that it may go to the inner side of the column part 19 which the said vertical side wall part 25 continues as it goes.
In this case, the circumferential interval between the pair of vertical side wall portions 25 respectively connected to the pillar portion 19 from both sides in the circumferential direction is gradually reduced from the radially outer side toward the inner side.

Further, the number and arrangement of the panel portions 17 and the column portions 19 can be appropriately changed in consideration of the strength required for the bottle 1 and the reduced pressure absorption capacity.
Further, in the above-described embodiment, the cross-sectional view orthogonal to the bottle axis O of each of the shoulder portion 12, the body portion 13 and the bottom portion 14 is circular, but is not limited thereto, and for example, a polygonal shape is appropriately used. It may be changed.
The synthetic resin material forming the bottle 1 may be appropriately changed, for example, polyethylene terephthalate, polyethylene naphthalate, amorphous polyester, or a blend material thereof.
Further, the bottle 1 is not limited to a single layer structure, and may be a laminated structure having an intermediate layer. Examples of the intermediate layer include a layer made of a resin material having a gas barrier property, a layer made of a recycled material, or a layer made of a resin material having an oxygen absorbing property.

  In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

  The rigidity with respect to the radial direction of the column portion can be improved.

DESCRIPTION OF SYMBOLS 1 Bottle 13 Body part 17 Panel part 19 Column part 21 Bottom wall part 22 Side wall part 25 Vertical side wall part L Virtual line O Container axis

Claims (1)

A plurality of panel portions that are recessed toward the inside in the radial direction are formed in the body portion at intervals in the circumferential direction, and a bottle having a column portion between the adjacent panel portions in the circumferential direction is a bottle. And
The panel portion has a bottom wall portion located on the inner side in the radial direction, and a side wall portion extending from the outer peripheral edge of the bottom wall portion toward the outer side in the radial direction,
Among the side wall portions, the vertical side wall portions that are located on both sides in the circumferential direction of the bottom wall portion and that are continuous with the column portion in the circumferential direction are gradually increased from the outside in the radial direction toward the inside in the cross-sectional view of the body portion. Gradually, so as to go to the inside of the column part that the vertical side wall part continues, the vertical side wall part is inclined with respect to a virtual line that connects the central part in the circumferential direction of the column part and the bottle axis ,
The bottle characterized by the outer peripheral surface which faces the radial direction outer side of the said pillar part being a smooth surface over the whole region .

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