JP4823589B2 - Plastic bottle - Google Patents

Description

  The present invention includes a mouth portion for filling and dispensing soft drinks and alcoholic beverages, a shoulder portion connected to the mouth portion via a neck portion, and a trunk portion that is connected to the shoulder portion and can stand independently. The present invention relates to a synthetic resin bottle.

  It is known that the use of biaxial stretch blow molding for blow molding a synthetic resin bottle is advantageous in that the body and shoulders can be thinned and the overall weight of the bottle can be reduced.

In addition, a bottle that has been constructed focusing on the mechanical strength and ease of gripping of the shoulder without losing the advantages of such thinning has been proposed. As such a conventional bottle, a plurality of ridge lines twisted around the bottle axis line toward the trunk section are provided on the shoulder portion, and hem lines connected with different curvature radii are arranged on both sides of the ridge line, and are adjacent to each other. There is one in which a flat panel is formed by linearly connecting the skirt lines (see, for example, Patent Document 1).
JP-A-8-301260

  However, conventional bottles have skirts on both sides of the ridgeline and form a flat panel between adjacent skirts, so the area occupied by each panel is smaller than the area occupied by the shoulder. In the case where a large vacuum absorption is required, it is insufficient as a vacuum absorption panel.

  In addition, since the conventional bottle is gripped with the ridgeline as a base point when the shoulder portion is gripped, a gap is formed between the panel and the hand, the gripping area is small, and there is room for improvement in grip performance. In particular, the influence of the grip property is remarkable when the capacity is large and the weight is large, or when the interval between the ridge lines is wide.

  The problem to be solved by the present invention is to improve the reduced-pressure absorption function and grip performance of a synthetic resin bottle.

A synthetic resin bottle according to the present invention comprises a mouth portion for filling and dispensing contents, a shoulder portion connected to the mouth portion via a neck portion, and a trunk portion that is connected to the shoulder portion and can stand independently. In the resin bottle, at least the shoulder portion of the region from the neck portion to the shoulder portion, and a ridge line twisted in a spiral shape formed by a curve or a straight line around the bottle axis toward the trunk portion, and the ridge line A panel is formed by alternately providing one skirt line adjacent to the skirt line and connecting the skirt line and another ridge line far from the skirt line in a straight line. .

  In the present invention, the ridge line and the skirt line may be provided in at least the shoulder portion of the region extending from the neck portion to the shoulder portion, and may be provided in the region extending from the neck portion to the shoulder portion. In addition, the ridge line and the skirt line adjacently disposed along the ridge line form a twisted shape around the bottle axis line toward the trunk part, and the twisted shape of the ridge line and the skirt line is a diagonal line formed by straight lines. Even if it exists, the spiral shape comprised by the curve may be sufficient.

  Moreover, it is preferable that this invention expands the pitch around the bottle axis line of a ridgeline and a skirt line toward a trunk | drum.

The synthetic resin bottle according to the present invention is disposed at least on the shoulder portion thereof along a ridge line twisted in a spiral shape formed by a curve or a straight line around the bottle axis toward the trunk portion, and along the ridge line. provided alternately one and hem line, since by forming a linearly connecting it panel and distant other edge line from the hem line, increasing the area occupied by the individual panels to the region area occupied by the shoulder It becomes possible to ensure, and a sufficient vacuum absorption function can be obtained. Further, since the ridge line and the skirt line are linearly connected to form a panel, the panel comes into contact with the palm and the grip performance is improved. Furthermore, when only one skirt line is provided at a position adjacent to the ridge line as in the present invention, the ridge line is easily formed at the time of molding.

  Therefore, according to the present invention, it is possible to provide a synthetic resin bottle excellent in a reduced pressure absorption function and a grip property.

  In addition, the present invention increases the rigidity around the bottle axis between the ridge line and the ridge line as the distance from the neck portion close to the grip requiring rigidity increases as the distance to the trunk portion increases, To provide a synthetic resin bottle with an excellent balance between the reduced pressure absorption function and rigidity, because the area of the panel is widened on the body side where the reduced pressure absorption function is required, and the sufficient reduced pressure absorption function can be exhibited. it can.

  Hereinafter, with reference to drawings, one form of the synthetic resin bottle which is the present invention is explained.

  FIG. 1 is a front view showing an embodiment of the bottle of the present invention. 2A and 2B are a top view and a cross-sectional view taken along line AA in FIG. 1, respectively.

  The bottle 10 of this embodiment is a so-called PET bottle formed by biaxially stretching blow-molding a preform made of PET (polyethylene terephthalate). This bottle 10 is a 1.8 liter bottle having an overall height of 343 mm, and its external shape is in the form of a single bottle filled with sake or soy sauce.

Reference numeral 11 denotes a mouth for filling and dispensing the contents. The mouth portion 11 includes a lip 11a and a neck ring 11c connected to the lip 11a via a thin portion 11b. Reference numeral 12 denotes a neck portion (neck portion) connected to the mouth portion 11. The neck portion 12 includes a thin portion 12a connected to the neck ring 11c and an inclined portion 12b connected to the thin portion 12a. Reference numeral 13 denotes a shoulder connected to the neck portion 12. Reference numeral 14 denotes a body portion that is connected to the shoulder portion 13 via the rib 14a. Further, the body portion 14 is connected to the bottom portion 15 through the annular recess 14b. The bottom portion 15 has an annular grounding surface 15a and allows the entire bottle 10 to be self-supporting via the body portion 14.

  In this embodiment, the shoulder portion 13 has a spiral ridgeline 1 formed in a curve around the bottle axis O toward the trunk portion 14 and one skirt line 2 adjacently disposed along the ridgeline 1. Are alternately arranged, and a flat panel 3 is formed by linearly connecting the skirt line 2 and another ridge line 1 far from the skirt line 2 (see FIG. 2B). In the illustrated example, eight panels 3 are formed at 45 ° intervals.

  According to such a configuration, it is possible to secure a large area occupied by each panel 3 with respect to the area area occupied by the shoulder portion 13, and a sufficient reduced pressure absorption function can be obtained. Further, since the ridge line 1 and the skirt line 2 are connected by a straight line and the panel 3 is flattened, the panel 3 comes into contact with the palm and the grip performance is improved. Furthermore, when only one skirt 2 is provided at a position adjacent to the ridge line 1 as in the present embodiment, the ridge line 1 is likely to be produced during molding. improves. The effect of this grip property becomes more prominent as the size of the bottle increases to 1.0 liter or more, which increases the bottle capacity.

  Therefore, according to the present invention, it is possible to provide a PET bottle excellent in a reduced pressure absorption function and a grip property.

  Further, in this embodiment, if the distance P between the ridge line 1 and the ridge line 1 around the bottle axis O is enlarged toward the body part 14, the distance P between the ridge line 1 and the ridge line 1 on the side of the neck portion 12 close to the grip that requires rigidity. The width of the panel 3 where the vacuum absorption function is required and the area of the panel 3 is widened to provide a sufficient vacuum absorption function, and the balance between the vacuum absorption function and the rigidity is improved. Can provide excellent PET bottles.

  The above description is only one embodiment of the present invention, and various modifications can be made within the scope of the claims. For example, the ridge line 1 and the skirt line 2 may be provided in at least the shoulder portion 13 of the region extending from the neck portion 12 to the shoulder portion 13, or may be provided in the region extending from the neck portion 12 to the shoulder portion 13. . Further, the ridgeline 1 and the skirt line 2 adjacently disposed along the ridgeline 1 form a twisted shape around the bottle axis O toward the body portion 14, and the twisted shape of the ridgeline 1 and the skirt line 2 is a straight line. It may be a slanted line formed of

Further, the number of panels is not limited to eight and can be selected as appropriate .

  Further, in this embodiment, the twisted shape of the ridge line 1 and the skirt line 2 is formed counterclockwise when viewed from the top surface of the bottle (inclined to the lower right in the drawing), but this is clockwise when viewed from the top surface of the bottle. Can be formed (inclined in the lower left direction in the drawing). In particular, when it is formed clockwise, when the mouth portion 11 of the bottle 10 is screwed into the screw cap structure, when the cap is closed (cap closing process during production and cap closing at the consumer), the cap With this rotation, the bottle can be securely gripped without rotating in the closing direction, which is suitable for securing the closing torque.

It is a front view which shows one form of this invention bottle. (A), (b) is the top view of FIG. 1, and AA sectional drawing, respectively.

Explanation of symbols

1 Ridge line 2 Bottom line 3 Flat panel
10 PET bottles
11 mouth
12 neck
13 shoulder
14 Torso
15 Bottom

Claims (3)

In a synthetic resin bottle comprising a mouth portion for filling and dispensing contents, a shoulder portion connected to the mouth portion via a neck portion, and a trunk portion that is connected to the shoulder portion and can stand independently,
At least the shoulder portion of the region from the neck portion to the shoulder portion is twisted in a spiral shape constituted by a curve around the bottle axis toward the trunk portion , or twisted in a diagonal shape constituted by a straight line. By alternately providing a ridge line and one skirt line adjacently disposed along this ridge line,
A synthetic resin bottle characterized in that a flat panel is formed by linearly connecting the skirt line and another ridge line far from the skirt line.   The synthetic resin bottle according to claim 1, wherein an interval between the ridge line and the ridge line around the bottle axis is enlarged toward the body part. The synthetic resin bottle according to claim 1 or 2, wherein the synthetic resin bottle is a one-bottle bottle type in which the shoulder portion has a shoulder portion that is connected to the trunk portion, and an upper end side thereof is tapered and connected to the neck portion. .

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