JP2018199532A - Synthetic resin bottle - Google Patents

Abstract

To provide a synthetic resin bottle having a high diagonal strength which enables secure prevention of dispensing multiple bottles at each sales time of an automatic dispenser.SOLUTION: A synthetic resin bottle comprises a barrel part 5 which includes four flat wall parts 9 connected with each other through each of corner parts 8 in a circumferential direction, and is formed in a square cylindrical shape. Each of the four flat wall parts 9 is provided with a panel part 10 which allows expansive deformation and depressive deformation in response to internal pressure variation in the barrel part 5. A lateral beads 12 extending linearly in a lateral direction, are provided at least in one of locations above and below the panel parts 10 in the flat wall parts 9. Each of the lateral beads 12 has a shape with its both ends open in each of the corner parts 8, both sides of which are adjacent to the flat wall parts 9.SELECTED DRAWING: Figure 1

Description

  The present invention includes a cylindrical mouth, a shoulder that continuously expands downward from the lower end of the mouth, a body that continues downward from the lower end of the shoulder, and a bottom that closes the lower end of the body And the inside of the trunk part is filled with contents such as beverages, and the inside of the trunk part is sealed with a cap attached to the mouth part.

  As a synthetic resin bottle for beverages, there is known a so-called square bottle having a square cylindrical body portion in which four flat wall portions are continuously provided in the circumferential direction via corner portions (see Patent Document 1 below). ).

  Beverages filled in this type of synthetic resin bottle are sold as products using vending machines. The vending machine pays out the bottles stacked on the column in a lying position one by one from the payout section. At this time, the stopper provided in the dispensing part of the vending machine contacts the corner part of the bottle following the dispensed bottle. Thus, the vending machine locks the bottle in the payout unit to prevent inadvertent payout.

Japanese Utility Model Publication No. 2-102316

  However, the body of the square bottle is relatively deformed in the diagonal direction. For this reason, when a large number of stacked vending machines are stacked, the lowermost square bottle following the dispensed bottle is deformed in the diagonal direction, passing through the stopper of the dispensing section and becoming inoperative. There is a risk that so-called multiple payouts will occur.

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

  Therefore, an object of the present invention is to provide a synthetic resin bottle that has a high diagonal strength and can reliably prevent multiple bottles from being sold by a vending machine.

  In order to achieve such an object, the present invention provides a cylindrical mouth, a shoulder that continuously expands downward from the lower end of the mouth, and a trunk that continues downward from the lower end of the shoulder. And a bottom part closing the lower end of the body part, and a synthetic resin bottle whose inside is sealed by a cap attached to the mouth part, the body part being interposed via a corner part And provided with four flat wall portions continuously provided in the circumferential direction, and is formed in a rectangular tube shape, and the corner portion is formed by a surface connecting the circumferential edges of the adjacent flat wall portions, and the trunk portion. Each of the flat wall portions is provided with a panel portion that allows bulging deformation and immersive deformation corresponding to a change in internal pressure of the body portion, and above and below the panel portion in the flat wall portion, At least one of them is provided with a groove-like horizontal bead extending linearly in the lateral direction. De is characterized in that both end portions are open at the corner portions of the respective adjacent sides of the flat wall portion.

  By providing a horizontal bead on the flat wall portion, the diagonal strength of the trunk portion is improved, and the diagonal strength of the trunk portion increases as the lateral length of the horizontal bead increases. From this, it is conceivable that the horizontal bead is extended from the flat wall portion to the boundary position with the corner portion adjacent to the flat wall portion, thereby giving a high diagonal strength to the body portion.

  However, if the horizontal bead is extended to the boundary between the flat wall portion and the corner portion, the thickness of the end portion in the longitudinal direction of the horizontal bead does not extend uniformly during blow molding of the bottle, and good formability is obtained. It may not be possible.

  Therefore, in the present invention, the lateral bead has a shape in which both end portions in the longitudinal direction are opened at the corner portions. According to this, a comparatively long horizontal bead can be provided, without reducing a shaping property.

  Therefore, the diagonal strength of the trunk can be reliably improved, and multiple bottles can be reliably prevented from being sold by the vending machine.

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 sectional drawing of the annular bead located in a flat wall part, B is sectional drawing of the annular bead located in a corner part. The figure which shows typically the payout mechanism of a vending machine.

  An embodiment of the present invention will be described with reference to the drawings. A synthetic resin bottle 1 (hereinafter referred to as a bottle 1) of this embodiment is a substantially cylindrical PET bottle formed by biaxially stretching a preform (not shown) made of polyethylene terephthalate (PET) resin by blow molding. As shown in FIG. 1, it is further provided through a mouth portion 3 sealed by screwing a cap 2 (virtual line), and a shoulder portion 4 whose diameter gradually increases downward from the mouth portion 3. A barrel portion 5 provided below the barrel portion 5 and a bottom portion 6 for closing the lower portion of the barrel portion 5 are provided.

  The bottle 1 formed in the shape shown in FIG. 1 is filled with a beverage, and then a cap 2 is screwed into the mouth 3 and sealed, and then the body 5 is not shown. Roll labels are attached and sold as products. The roll label is a thin synthetic resin sheet formed in a band shape, and is printed such as displaying contents. 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 body portion 5 is formed in a square cylinder shape 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 body portion 5. Each corner part 8 is comprised by the curved surface which connects the circumferential direction edge of the flat wall part 9 adjacent to each other.

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

  Further, as shown in FIG. 1, each flat wall portion 9 of the body portion 5 is formed with a groove-like lateral bead 12 that is positioned above and below the panel portion 10 and extends linearly in the lateral direction. ing. The lateral bead 12 is longer than the lateral length of the panel portion 10, and each lateral end of each lateral bead 12 is opened at each corner portion 8.

  As shown in FIG. 1, a groove-like upper annular bead 13 and a lower annular bead 14 that are continuous over the entire circumference of the body 5 are formed.

  The upper annular bead 13 is formed at a position at a predetermined distance downward from the upper edge of the trunk portion 5 (boundary with the shoulder portion 4). The upper annular bead 13 disposed at this position extends in the circumferential direction through the space between the lateral bead 12 of each flat wall portion 9 and the panel portion 10.

  Further, the upper annular bead 13 does not have the same shape over the entire circumference, and the depth D1 and the outer vertical width W1 of the portion located on the flat wall portion 9 in the upper annular bead 13 shown in FIG. The depth D2 and the outer vertical width W2 of the portion located at the corner 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 located below the portion located on the flat wall portion 9, and the position of the outer edge of the upper inner surface is located on the flat wall portion 9. It is formed in the same way as the located part.

  The bottle 1 of this embodiment having the above configuration has the following effects. That is, when the horizontal beads 12 are formed on each flat wall portion 9, the diagonal strength of the trunk portion 5 (compressive deformation strength in the diagonal direction) is improved, and when the trunk portion 5 receives a load from the lateral direction. Diagonal deformation can be suppressed.

  By increasing the diagonal strength of the body portion 5 of the bottle 1, for example, as shown in FIG. 4, when a plurality of bottles 1 are stacked in a plurality of stages in a sideways posture in a column 15 of a vending machine, It is possible to prevent the bottle 1 at the position from slipping through the stopper 16 at the dispensing portion.

  The stopper 16 of the dispensing part of the vending machine contacts the corner part 8 of the body part 5 of the bottle 1 to lock 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. However, since the deformation at this time is restrained by the lateral bead 12 of the body portion 5, the bottle 1 does not pass between the stopper 16 and the inner wall of the column 15, and is often used in vending machines. This is prevented.

  Further, as shown in FIG. 1, the lateral beads 12 have a shape in which both longitudinal ends thereof are opened at the corner portions 8, so that the thickness of the body portion 5 can be made uniform during blow molding. A torso 5 is formed. Therefore, the comparatively long horizontal bead 12 can be provided without deteriorating the shaping property at the time of blow molding of the bottle 1.

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

  Moreover, the diagonal intensity | strength of the trunk | drum 5 is further improved by the bottle 1 being formed with the upper annular bead 13. As shown in FIG. 3B, the upper annular bead 13 has the depth D2 of the portion located in the corner portion 8 increased, so that the depth D1 (see FIG. 3B) of the portion located in the flat wall portion 9 is increased. Even if it is relatively shallow, the diagonal intensity can be increased. And, by making the outer vertical 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, good shapeability is maintained and the corner of the upper annular bead 13 is maintained. The depth D2 of the part located in the part 8 can be made large.

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

Claims (1)

A cylindrical mouth portion, a shoulder portion that continuously expands downward from the lower end of the mouth portion, a trunk portion that continues downward from the lower end of the shoulder portion, and a bottom portion that closes the lower end of the trunk portion A synthetic resin bottle in which the inside of the body is sealed by a cap attached to the mouth,
The trunk portion includes four flat wall portions that are continuously provided in the circumferential direction via corner portions, and is formed in a square cylindrical shape, and the corner portions are formed by connecting circumferential edges of adjacent flat wall portions to each other. It is composed of connecting surfaces, and each flat wall portion of the trunk portion is provided with a panel portion that allows bulging deformation and immersive deformation in response to an internal pressure change of the trunk portion.
At least one of the upper side and the lower side of the panel part in the flat wall part is provided with a groove-like horizontal bead extending linearly in the horizontal direction,
Both sides of the horizontal bead are opened at the corners adjacent to both sides of the flat wall, respectively.