JP6427017B2 - Plastic bottle - Google Patents

Description

  According to the present invention, a cylindrical opening, a shoulder extending continuously downward from the lower end of the opening, a trunk extending downward from the lower end of the shoulder, and a bottom closing the lower end of the trunk And a plastic-made bottle in which the inside of the body is filled with a content such as a beverage and the inside of the body is sealed by a cap attached to the mouth.

  A so-called square shaped bottle having a square cylindrical body portion in which four flat wall portions are connected in the circumferential direction via a corner portion is known as a plastic bottle for beverages (see Patent Document 1 below) ).

  Beverages filled in this kind of synthetic resin bottles are sold as products using vending machines. The vending machine dispenses the bottles stacked in a column in a sideways posture from the dispensing unit one by one. At this time, a stopper provided in the dispenser of the vending machine abuts on a corner of the bottle following the dispensed bottle. Thus, the vending machine locks the bottle in the dispensing unit to prevent careless dispensing.

Japanese Utility Model Publication No. 2-102316

  However, the body of the square bottle has a relatively large deformation in the diagonal direction. For this reason, when many columns are stacked in the column of the vending machine, the square bottle at the lowermost position following the dispensed bottle is deformed in the diagonal direction, and it slips through the stopper of the dispensing part and is not There is a risk that so-called multiple feeding to be paid out will occur.

  In order to prevent such multiple occurrence, it is necessary to increase the strength (hereinafter referred to as diagonal strength) for suppressing the deformation of the body in the diagonal direction in the body of the square bottle. .

  Therefore, an object of the present invention is to provide a synthetic resin bottle having high diagonal strength and capable of reliably preventing multiple bottles at the time of sale by a vending machine.

In order to achieve the above object, the present invention provides a cylindrical mouth, a shoulder which is continuously and gradually expanded downward from the lower end of the mouth, and a body which is continuous downward from the lower end of the shoulder. And a bottom portion closing the lower end of the body portion, wherein the inside of the body portion is sealed by a cap attached to the mouth portion, wherein the body portion is formed via a corner portion. And four flat wall portions continuously provided in the circumferential direction and formed in a square cylindrical shape, and the corner portion is formed of a surface which curves and connects circumferential end edges of the flat wall portions adjacent to each other, In each flat wall portion of the body portion, provided is a panel portion that allows bulging deformation and immersion deformation corresponding to a change in internal pressure of the body portion, which is an upper position of the panel portion, It is continuous over the entire circumference of the body at a position at a predetermined distance downward from the upper edge of the body. The portion of the annular bead located at the corner portion has a depth and a distance between the outer edge of the upper inner surface and the outer edge of the lower inner surface are the same as those of the annular bead. that is larger than a portion located on the flat wall portion.

  By providing a continuous groove-shaped annular bead over the entire circumference of the body, the diagonal strength of the body is improved. And the annular bead further enhances the diagonal strength of the body by forming the depth relatively deep.

  However, if it is attempted to form the annular bead deep throughout the entire circumference, the wall thickness around the annular bead may not extend uniformly when the bottle is blow-molded, and good shapeability may not be obtained.

  So, in 2nd invention, the depth of the part located in the said corner part in the said annular bead was made larger than the part located in the said flat wall part in the said annular bead. Thereby, the diagonal strength of the body can be reliably improved without making the depth of the portion of the annular bead located on the flat wall as deep.

  Moreover, the distance between the outer edge of the upper inner surface and the outer edge of the lower inner surface of the portion of the annular bead located at the corner portion is larger than that of the portion of the annular bead located at the flat wall portion. According to this, it is possible to form the annular bead of the corner portion deeper than the annular bead other than the corner portion without reducing the formability.

  Therefore, the diagonal strength of the trunk can be surely improved, and it is possible to reliably prevent a large number of vending machines selling at the same time.

Furthermore, the portion of the annular bead located at the corner portion is formed such that the outer edge of the lower inner surface is located lower than the portion of the annular bead located at the flat wall portion, and outer edge is, that the have been formed in a portion of the same height position located flat wall portion of the annular bead.

  According to this, since the height position of the outer edge of the upper inner surface of the annular bead is uniform over the entire circumference, it is possible to well suppress the deformation of the trunk when the load is applied to the corner of the trunk. The diagonal strength of the trunk can be reliably improved.

Further, in the present invention , at least one of the upper and lower sides of the panel portion in the flat wall portion is provided with a groove-like horizontal bead extending linearly in the lateral direction, and the horizontal bead has both flat ends It is preferable to open at each of the corners adjacent to both sides of the wall.

  By providing the annular bead and the cross bead together, the diagonal strength of the body can be further improved.

BRIEF DESCRIPTION OF THE DRAWINGS The side view which shows the synthetic resin bottles of embodiment of this invention. II-II sectional view taken on the line of FIG. A is a cross-sectional view of an annular bead located on a flat wall, and B is a cross-sectional view of an annular bead located on a corner. The figure which shows the delivery mechanism of a vending machine typically.

  An embodiment of the present invention will be described based on the drawings. The synthetic resin bottle 1 of this embodiment (hereinafter referred to as bottle 1) is a substantially cylindrical PET bottle obtained by biaxially stretching a preform (not shown) made of polyethylene terephthalate (PET) resin by blow molding. As shown in FIG. 1, through the mouth 3 sealed by screwing the cap 2 (virtual line) and the shoulder 4 gradually increasing in diameter downward from the mouth 3 It has a body portion 5 continuously provided below the lower portion, and a bottom portion 6 closing the lower portion of the body portion 5.

  A bottle 1 formed into a shape as shown in FIG. 1 is filled with a beverage, and then a cap 2 is screwed into the mouth 3 for sealing, and then the body 5 is not shown. The roll label is attached and sold as a product. The roll label is a thin synthetic resin sheet formed in a band shape, and printing such as display of contents is applied. And the product which accommodated the drink in the bottle 1 is sold using a vending machine so that it may mention later.

  As shown in FIG. 2, the trunk portion 5 is formed in a square cylindrical shape by including four flat wall portions 9 continuously provided in the circumferential direction via the corner portion 8.

  As shown in FIG. 1, each flat wall portion 9 is formed with a panel portion 10 that allows bulging deformation and immersive deformation corresponding to a change in internal pressure of the trunk portion 5. Each corner portion 8 is formed of a curved surface connecting the circumferential end edges of the flat wall portions 9 adjacent to each other.

  At the boundary position between each flat wall portion 9 and each corner portion 8, a groove-shaped vertical bead 11 extending in the vertical direction is formed. The vertical bead 11 is formed to have a length substantially equal to the length of the panel portion 10 in the vertical direction.

  In addition, as shown in FIG. 1, groove-shaped horizontal beads 12 which are positioned linearly above and below the panel 10 and are respectively formed above and below the panel 10 are formed on each flat wall 9 of the trunk 5. ing. The lateral bead 12 is longer than the lateral length of the panel portion 10, and each of the lateral ends is opened at each corner portion 8.

  Further, as shown in FIG. 1, the trunk portion 5 is formed with a groove-shaped upper annular bead 13 and a lower annular bead 14 which are continuous over the entire circumference thereof.

  The upper annular bead 13 corresponds to the annular bead of the present invention, and is formed at a position spaced downward from the upper edge (the boundary with the shoulder 4) of the body 5. The upper annular bead 13 arranged at this position extends circumferentially between the transverse bead 12 of each flat wall 9 and the panel 10.

  Furthermore, the upper annular bead 13 is not formed in the same shape over the entire circumference, and the depth D1 and the outer upper and lower width W1 of the portion located on the flat wall 9 in the upper annular bead 13 shown in FIG. The depth D2 and the outer upper and lower width W2 of the portion located at the corner portion 8 in the upper annular bead 13 shown in FIG. 3B are made larger than the distance between the outer edge and the outer edge of the lower inner surface). ing. At this time, the upper annular bead 13 has the outer edge of the lower inner surface thereof positioned below the portion located on the flat wall 9, and the position of the outer edge of the upper inner surface is at the flat wall 9 It is formed in the same way as the located part.

  The bottle 1 of the present embodiment having the above configuration has the following effects. That is, by forming the horizontal bead 12 in each flat wall portion 9, the diagonal strength (compression deformation strength in the diagonal direction) of the trunk portion 5 is improved, and the trunk portion 5 receives a load from the lateral direction. The deformation in the diagonal direction can be suppressed.

  When the diagonal strength of the barrel 5 of the bottle 1 is improved, for example, as shown in FIG. 4, when stacking the plurality of bottles 1 in a plurality of stages in a sideways posture in the column 15 of the vending machine, The bottle 1 at the position can prevent the stopper 16 of the dispensing unit from slipping through.

  The stopper 16 of the dispensing unit of the vending machine locks the bottle 1 by abutting on the corner 8 of the barrel 5 of the bottle 1. When a load is applied from above to the bottle 1 in which the stopper 16 is in contact with the corner portion 8, the body portion 5 of the bottle 1 is deformed by this load and the bottle 1 is between the stopper 16 and the inner wall of the column 15 The bottle 1 does not pass between the stopper 16 and the inner wall of the column 15 because the deformation at this time is suppressed by the cross bead 12 of the barrel 5, and This is prevented.

  Furthermore, as shown in FIG. 1, the lateral bead 12 is shaped such that both longitudinal end portions thereof are open at the corner portions 8, so that the thickness of the body portion 5 is made uniform during blow molding. The body 5 is formed. Therefore, a relatively long horizontal bead 12 can be provided without reducing the formability at the time of blow molding of the bottle 1.

  The lateral bead 12 may be provided only on either the upper side or the lower side of the panel portion 10.

  In addition, in the bottle 1, the diagonal strength of the body 5 is further improved by the formation of the upper annular bead 13. And since the upper annular bead 13 made depth D2 of the part located in the corner part 8 large as shown to FIG. 3B, depth D1 (refer FIG. 3B) of the part located in the flat wall part 9 is Even if it is relatively shallow, the diagonal strength can be increased. And, by making the outer upper and lower width W2 of the portion located at the corner portion 8 of the upper annular bead 13 larger than the portion located at the flat wall portion 9, the good shapeability is maintained, and the corner of the upper annular bead 13 The depth D2 of the portion located in the portion 8 can be made large.

As in the present embodiment, although both the lateral bead 12 and the upper annular bead 13 can be provided on the bottle 1 to dramatically improve the diagonal strength , the upper annular shape is not provided. The diagonal strength can be improved by providing the bead 13 alone.

  DESCRIPTION OF SYMBOLS 1 ... Synthetic resin bottle, 2 ... Cap, 3 ... Opening part, 4 ... Shoulder part, 5 ... Body part, 6 ... Bottom part, 8 ... Corner part, 9 ... Flat wall part, 10 ... Panel part, 12 ... Horizontal bead , 13 ... top annular bead (annular bead).

Claims (2)

A cylindrical opening, a shoulder extending continuously downward from the lower end of the opening, a body extending downward from the lower end of the shoulder, and a bottom closing the lower end of the opening A bottle made of synthetic resin in which the inside of the body is sealed by a cap attached to the mouth,
The torso portion is formed in a square tubular shape, including four flat wall portions continuously provided in the circumferential direction via the corner portions, and the corner portions are circumferential edge portions of the flat wall portions adjacent to each other. The flat wall portion of the body portion is provided with a panel portion that is configured to be curved and connected, and that allows each of the flat wall portions of the body portion to undergo bulging deformation and immersive deformation in response to changes in the internal pressure of the body portion,
A groove-shaped annular bead is provided continuously over the entire circumference of the body, at a position above the panel portion and at a predetermined distance downward from the upper edge of the body,
The portion of the annular bead located at the corner has a depth and a distance between the outer edge of the upper inner surface and the outer edge of the lower inner surface located at the flat wall of the annular bead. The outer edge of the lower inner surface is formed to be lower than the portion of the annular bead located on the flat wall portion, and the outer edge of the upper inner surface is at the annular bead. A bottle made of a synthetic resin, which is formed at the same height position as a portion located on the flat wall portion . In at least one of the upper side and the lower side of the panel portion in the flat wall portion, a groove-like horizontal bead linearly extending in the lateral direction is provided
The synthetic resin bottle according to claim 1 , wherein the lateral bead is opened at each of the corners adjacent to both sides of the flat wall portion at both ends .

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