JP4932453B2 - Square bottle - Google Patents

Description

  The present invention relates to a square bottle made of synthetic resin.

As this type of square bottle, for example, as shown in Patent Document 1 below, the mouth, shoulder, body, and bottom are integrally formed of synthetic resin, and from above to below in the central axis direction of this bottle. The body portion is configured to include a plurality of main wall portions connected via a connecting portion in a circumferential direction of the bottle so that the cross-sectional view is a polygonal shape. Are known.
JP 2006-306427 A

 By the way, in recent years, in consideration of environmental problems, etc., there is a tendency to reduce the thickness of this bottle in order to reduce the amount of synthetic resin material used. When a pressing force directed radially inward is applied to the body portion in a reduced pressure state, there is a problem that it is likely to be greatly depressed to the extent that wrinkles remain even if it is subsequently restored and deformed.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a rectangular bottle that can suppress a reduction in deformation resistance of the body even when the bottle is thinned.

In order to solve the above-described problems and achieve such an object, the square bottle of the present invention has a mouth portion, a shoulder portion, a body portion, and a bottom portion that are integrally formed of a synthetic resin, and the central axis of the bottle. The trunk portion is connected in this order from the upper side to the lower side in the direction, and the trunk portion is connected to the circumferential direction of the bottle via a coupling portion so that the cross-sectional view is a polygonal shape. A square bottle in which a first circumferential groove and a second circumferential groove continuously extending over the entire circumference of the body portion are formed in the body portion at intervals from each other in the central axis direction. The main wall portion and the connecting portion extend in parallel with the central axis direction, and the first circumferential groove is located above the ground contact surface of the bottom portion, and the center between the ground contact surface and the upper end of the trunk portion. About 75% to 85% of the distance in the axial direction And the second circumferential groove is formed at a position 25% or more and 40% or less of the distance upward from the ground contact surface, and the first circumferential groove and the second circumferential groove in the central axis direction. An interval between the circumferential groove is larger than an interval between the first circumferential groove and the upper end of the body portion and an interval between the grounding surface and the second circumferential groove.
According to this invention, since the first circumferential groove and the second circumferential groove are formed in the body portion, it is possible to improve the deformation resistance of the body portion with respect to, for example, the bottle internal pressure and the external force. In addition, since these circumferential grooves are formed at the positions as described above, the deformation resistance of each portion defined by the first and second circumferential grooves in the body portion is biased for each of these portions. Can be improved evenly.
As described above, even when the bottle is thinned, it is possible to suppress the deformation resistance of the body portion from being lowered over the entire region.

Here, the main wall portion may be formed with a panel portion that is recessed toward the inside in the radial direction of the bottle.
The connecting portion may be a flat corner wall portion.

  According to the square bottle according to the present invention, it is possible to suppress the deformation resistance of the body portion from being lowered even if the bottle is thinned.

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the bottle 10 according to the present embodiment includes a mouth part 11, a shoulder part 12, a body part 13, and a bottom part 14, and these 11, 12, 13, and 14 have a common central axis. In a state of being positioned on the shaft, a schematic configuration is provided in which the common shaft direction is continuously arranged in this order from the upper side to the lower side.
The bottle 10 is integrally formed of a synthetic resin such as polyethylene terephthalate by, for example, biaxial stretch blow molding. A male screw portion 11a is formed on the outer peripheral surface of the mouth portion 11, and a cap (not shown) is detachably screwed onto the male screw portion 11a.

 Here, in the present embodiment, the shoulder portion 12, the body portion 13 and the bottom portion 14 have a polygonal cross-sectional shape, and the common axis is a straight line passing through the central portion of the polygon formed by the cross-section. ing. Hereinafter, this common axis is referred to as a central axis O. Moreover, the trunk | drum 13 is extended in parallel with this central axis O over the full length in the said central axis O direction, and the shoulder part 12 is gradually diameter-reduced as it goes upwards from the upper end 13d of the trunk | drum 13. As shown in FIG.

 In this embodiment, the trunk | drum 13 is provided with the some main wall part 15 connected via the connection part in the circumferential direction of this bottle 10 so that the cross-sectional view may become polygonal shape as mentioned above. Yes. In the illustrated example, the connecting portion is a flat corner wall portion 16 having a shorter length in the circumferential direction than the main wall portion 15. Thereby, the trunk | drum 13 is comprised so that the main wall part 15 and the corner | angular wall part 16 may make the ridgeline 18, and may be continuously connected by the said circumferential direction.

 The main wall portion 15 and the corner wall portion 16 each have a rectangular shape that is long in the direction of the central axis O in a side view of the body portion 13. In the illustrated example, four main wall portions 15 and four corner wall portions 16 are provided, and the two main wall portions 15 are disposed to face each other with the central axis O interposed therebetween, and 2 The two corner wall portions 16 are also arranged to face each other with the central axis O interposed therebetween.

In the present embodiment, the first circumferential groove 17 and the second circumferential groove 19 that continuously extend over the entire circumference of the body portion 13 are formed at intervals in the central axis O direction. . Thereby, the trunk | drum 13 is divided into three, the upper part 13a, the middle part 13b, and the lower part 13c in the said center axis line O direction. And in the example of illustration, the panel part 20 dented toward the radial inside of the bottle 10 is formed in the main wall part 15 in each of these parts 13a-13c, respectively.
Each of the first and second circumferential grooves 17 and 19 has a body 13 having a concave cross-sectional shape extending in the direction of the central axis O, and the circumferential grooves 17 and 19 are mutually connected. It is the same size.

 Further, the first circumferential groove 17 is located above the ground surface 14a of the bottom portion 14 at a position that is 75% or more and 85% or less of the distance A in the central axis O direction between the ground surface 14a and the upper end 13d of the body portion 13. Is formed. Further, the second circumferential groove 19 is formed at a position away from 25% to 40% of the distance A upward from the ground contact surface 14a. Furthermore, in the direction of the central axis O, the distance B between the first circumferential groove 17 and the second circumferential groove 19 is the distance C between the first circumferential groove 17 and the upper end 13d of the body portion 13 and the grounding surface 14a. The distance from the second circumferential groove 19 is greater than D.

As described above, according to the square bottle 10 according to the present embodiment, the first circumferential groove 17 and the second circumferential groove 19 are formed in the body portion 13. It is possible to improve deformation resistance against the above. Moreover, since the circumferential grooves 17 and 19 are formed at the positions as described above, the upper portion 13a, the middle portion 13b, and the lower portion 13c defined by the first and second circumferential grooves 17 and 19 in the body portion 13. The deformation resistance can be improved evenly without biasing these portions.
As described above, even when the bottle 10 is thinned, it is possible to suppress the deformation resistance of the body portion 13 from being lowered over the entire region.

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 configuration including the main wall portion 15 and the corner wall portion 16 alternately connected around the central axis O through the ridge line 18 is shown as the body portion 13. Thus, the plurality of main wall portions 15 may be connected around the central axis O through only the ridge line 18 without the corner wall portion 16 interposed. That is, the connecting portion may be the ridge line 18. Furthermore, although the corner wall portion 16 is shown as the connecting portion, the form is not limited to the embodiment, and for example, a convex curved surface shape, a concave curved surface shape, or a configuration in which a plurality of planes are continuously provided is adopted. May be.

Moreover, if the cross-sectional view shape of the trunk | drum 13 is made into polygonal shape, it will not be restricted to the form mentioned above.
Furthermore, in the said embodiment, although the longitudinal cross-sectional view shape of the trunk | drum 13 of each of the 1st, 2nd circumferential grooves 17 and 19 was a concave curved surface shape, it replaced with this, for example, may be trapezoid shape or V-shape. Good.

 Even if the bottle is thinned, it is possible to suppress the deformation resistance of the body portion from being lowered.

It is a side view of a square bottle shown as one embodiment concerning the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Square bottle 11 Mouth part 12 Shoulder part 13 Trunk part 13d Upper end of trunk | drum 14 Bottom part 14a Grounding surface 15 Main wall part 16 Corner wall part (connection part)
17 1st circumferential groove 19 2nd circumferential groove 20 Panel part A Distance B, C, D Space | interval O Center axis

Claims (3)

The mouth, shoulder, body, and bottom are integrally formed of synthetic resin, and are connected in this order from the upper side to the lower side in the central axis direction of this bottle,
The body portion includes a plurality of main wall portions connected via a connecting portion in the circumferential direction of the bottle so that the cross-sectional view thereof is a polygonal shape, and the body portion is continuous over the entire circumference. The first circumferential groove and the second circumferential groove extending in the direction of the central axis are formed in a square bottle spaced apart from each other,
The main wall portion and the connecting portion extend parallel to the central axis direction,
The first circumferential groove is formed at a position that is 75% or more and 85% or less of the distance in the central axis direction between the grounding surface and the upper end of the trunk part, upward from the grounding surface of the bottom.
The second circumferential groove is formed at a position away from 25% to 40% of the distance upward from the ground plane.
In the central axis direction, the distance between the first circumferential groove and the second circumferential groove is larger than the distance between the first circumferential groove and the upper end of the body portion and the distance between the grounding surface and the second circumferential groove. A square bottle characterized by The square bottle according to claim 1,
The main wall is formed with a panel that is recessed toward the inside in the radial direction of the bottle. The square bottle according to claim 1 or 2,
The square bottle characterized by the said connection part being a flat corner wall part.

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