JP5858339B2 - Plastic bottle - Google Patents

Description

  The present invention relates to a plastic bottle that can increase the strength of a shoulder.

  Recently, plastic bottles for drinks and the like have become common, and labels are attached to such plastic bottles.

  The plastic bottles are filled and stored and then stacked and stored. In this case, it is required to improve the strength of the entire plastic bottle, particularly the shoulder in the vertical direction.

Japanese Utility Model Sho 56-118806

  The present invention has been made in consideration of such points, and an object thereof is to provide a plastic bottle that can improve the strength of the plastic bottle, particularly at the shoulder.

  The present invention relates to a plastic bottle, comprising a cylindrical mouth portion, a rectangular tubular trunk portion, a shoulder portion disposed between the mouth portion and the trunk portion, and a bottom portion below the trunk portion, Has a truncated quadrangular shape with four shoulder slopes, and has an elongated valley with a triangular cross section drawn inward at the shoulder interface between the shoulder slopes. A plastic bottle is characterized in that a plurality of elongated ridges having a triangular cross-section projecting outward are provided on an inclined surface, and the elongated valleys and the elongated ridges are formed radially when viewed from a plane.

  In the present invention, an annular inclined surface that extends in the horizontal direction and is inclined is formed between the shoulder portion and the body portion, and each elongated valley portion is drawn inward with respect to the annular inclined surface, and each elongated mountain portion is Is a plastic bottle that protrudes outward with respect to the annular inclined surface.

  The present invention is a plastic bottle in which a label having a breaking line extending in the vertical direction is attached on the body part, and the breaking line of the label is arranged corresponding to any of the elongated valleys.

  According to the present invention, the strength along the vertical direction of the shoulder portion can be increased by the elongated peak portion provided on the inclined surface of the shoulder portion and the elongated valley portion provided on the boundary surface.

FIG. 1 is a front view showing a plastic bottle according to an embodiment of the present invention. FIG. 2 is a perspective view showing a plastic bottle according to an embodiment of the present invention. FIG. 3 is a bottom view showing a plastic bottle according to an embodiment of the present invention. FIG. 4 is a top view showing a plastic bottle according to an embodiment of the present invention. FIG. 5 is a view showing a state in which a label is pasted on a plastic bottle according to an embodiment of the present invention. FIG. 6 is an enlarged perspective view showing a shoulder portion of the plastic bottle according to the embodiment of the present invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 6 show an embodiment of the present invention.

  First, the outline of the plastic bottle according to the present embodiment will be described with reference to FIGS.

  The plastic bottle 10 includes a mouth portion 11, a shoulder portion 12 provided below the mouth portion 11, a trunk portion 20 provided below the shoulder portion 12, and a bottom portion 30 provided below the trunk portion 20. Yes.

  Among these, the trunk | drum 20 has the four side surfaces 21 which become the mutually same shape, and consists of a square cylinder shape as a whole. In addition, a flat body boundary surface 22 is formed between adjacent side surfaces 21.

  Moreover, the four side surfaces 21 of the trunk | drum 20 are divided into the upper area | region 21a and the lower area | region 21b through the side surface horizontal concave rib 24a drawn inward (inward of the bottle 10). Each body boundary surface 22 is also divided into an upper region 22a and a lower region 22b via a boundary surface horizontal concave rib 24b that is drawn inward (inward of the bottle 10).

  Among these, the horizontal concave rib 24 is comprised by the side surface horizontal concave rib 24a and the boundary surface horizontal concave rib 24b.

  Further, a flat panel portion 23 is provided in each of the upper region 21a and the lower region 21b of each side surface 21 of the trunk portion 20, and the panel portion 23 allows the plastic bottle 10 to be inflated and decompressed. Absorbs the applied pressure.

  Furthermore, the bottom part 30 has a peripheral part 31 and a central part 32 that is located at the center of the peripheral part 31 and is lifted upward from the peripheral part 31, and a circle is provided between the central part 32 and the peripheral part 31. A circumferentially extending intermediate portion 33 is interposed.

  Next, the configuration of the shoulder portion 12 of the plastic bottle 10 will be described in detail with reference to FIGS. 1, 2, and 6.

  As shown in FIGS. 1, 2, and 6, the shoulder 12 of the plastic bottle 10 is formed between the mouth 11 and the trunk 20 and has four shoulder inclined surfaces 12 </ b> A. As a truncated square conical shape.

  A shoulder boundary surface 12B is formed between the shoulder inclined surfaces 12A. Of these, each shoulder inclined surface 12 </ b> A is formed corresponding to the side surface 21 of the trunk portion 20, and each shoulder boundary surface 12 </ b> B is formed corresponding to the trunk portion boundary surface 22 of the trunk portion 20.

  Each shoulder inclined surface 12A is provided with a plurality of, for example, four elongated ridges 16 that protrude outward and have a triangular cross section, and each shoulder boundary surface 12B protrudes inward and has a triangular cross section. An elongated valley portion 15 having the shape is provided.

  By the way, the four elongated ridges 16 formed on each shoulder inclined surface 12A and the elongated valleys 15 formed on each shoulder boundary surface 12B are arranged radially on the plane (FIG. 3). reference).

  An annular inclined surface 13 that extends in the horizontal direction and is inclined is formed between the shoulder portion 12 and the body portion 20, and the four elongated mountain portions 16 provided on each shoulder inclined surface 12 </ b> A are It protrudes outward with this annular inclined surface 13 as a reference. Further, the elongated valley 15 provided on each shoulder boundary surface 12B is drawn inward with the annular inclined surface 13 as a reference.

  Such a plastic bottle 10 can be produced by biaxially stretch blow molding a preform produced by injection molding a synthetic resin material. In addition, it is preferable to use a thermoplastic resin, especially PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate) as a material of the preform, that is, the plastic bottle 10.

  The plastic bottle 10 can also be formed as a multilayer molded bottle having two or more layers. That is, by extrusion molding or injection molding, for example, the intermediate layer has gas barrier properties and light shielding properties such as MXD6, MXD6 + fatty acid salt, PGA (polyglycolic acid), EVOH (ethylene vinyl alcohol copolymer) or PEN (polyethylene naphthalate). A multilayer bottle having gas barrier properties and light shielding properties may be formed by extrusion molding a preform composed of three or more layers as the resin (intermediate layer), and then blow molding. Such an intermediate layer is preferably provided in at least the body 20 of the plastic bottle 10. Further, it is preferable to provide an intermediate layer in the region of the bottom 30 except for the central portion of the bottom 30. This is because this portion may cause delamination (delamination) when subjected to an impact such as a case dropping. In order to have gas barrier properties and light shielding properties, a blend bottle in which thermoplastic resins are blended may be formed as well as multilayers.

  Next, the operation of the present embodiment having such a configuration will be described.

  First, the plastic bottle 10 is filled with a content liquid such as green tea or coffee, and then sealed.

  In this case, the content liquid is filled into the plastic bottle 10 in a state where the central portion 32 of the bottom 30 of the plastic bottle 10 is pushed up by a push rod (not shown).

  Next, after sealing the mouth portion 11 with a cap (not shown), a label L such as a shrink film is attached around the body portion 20 (see FIG. 5). In FIG. 5, for convenience, the plastic bottle 10 is shown with its cap removed.

  The plastic bottles 10 filled with the content liquid are stacked and stored or transported. For this reason, a large load may be applied to the plastic bottle 10 filled with the content liquid in the vertical direction during storage or transportation.

  According to the present invention, four elongated ridges 16 are provided on each shoulder inclined surface 12A of the shoulder 12, and elongated valleys 15 are provided on each shoulder boundary surface 12B. Since the elongated valley portions 15 are formed to have a radial shape on a plane, the elongated mountain portions 16 and the elongated valley portions 15 function as reinforcing ribs with respect to the load applied to the shoulder portion 12. For this reason, the load of the up-down direction added to the shoulder part 12 can be received reliably by these elongate peak part 16 and the elongate valley part 15, and the intensity | strength along the up-down direction of the shoulder part 12 can be improved.

DESCRIPTION OF SYMBOLS 10 Plastic bottle 11 Mouth part 12 Shoulder part 12A Shoulder inclined surface 12B Shoulder boundary surface 13 Annular inclined surface 15 Elongated valley part 16 Elongated mountain part 20 Trunk part 21 Side surface 21a Upper area | region 21b Lower area | region 22 Boundary surface 23 Panel part 24 horizontal concave rib 24a side horizontal concave rib 24b boundary horizontal concave rib 30 bottom L label L1 breaking line

Claims (3)

In plastic bottles,
A cylindrical mouth,
A rectangular tubular body,
A shoulder disposed between the mouth and the torso;
A bottom portion below the trunk,
The shoulder has a truncated quadrangular shape with four shoulder slopes, and an elongated valley having a triangular cross section that is drawn inward is provided on the shoulder boundary surface between the shoulder slopes. A plurality of elongated peaks having a triangular cross-section projecting outward are provided on the shoulder inclined surface,
A plastic bottle characterized in that the elongated valley portion and the elongated mountain portion are formed radially when viewed from a plane.   An annular inclined surface is formed between the shoulder portion and the body portion, extending in the horizontal direction and inclined. Each elongated valley portion is drawn inward with respect to the annular inclined surface, and each elongated mountain portion is an annular inclined surface. The plastic bottle according to claim 1, wherein the plastic bottle projects outward. A label having a breaking line extending in the vertical direction is pasted on the trunk,
3. The plastic bottle according to claim 1, wherein the broken line of the label is arranged corresponding to any of the elongated valleys.

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