JP2017024776A - Bottle comprising waveform peripheral grooves on trunk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bottle capable of suppressing occurrence deformation in which a deformed bottle shape cannot be restored, on a trunk during pressure reduction in the bottle.SOLUTION: A bottle 1 is formed into a cylindrical shape having a bottom, and is formed of a synthetic resin material. A trunk 13 of the bottle comprises: waveform peripheral grooves 23, 24 which are bent in a vertical direction and extend along a peripheral direction and which exhibit a waveform shape, in side view of viewing the bottle 1 from outside of a diameter direction; and auxiliary ribs 25, 26 which are connected to or come close to apex parts of the waveform peripheral grooves 23, 24, and are disposed on outside in a vertical direction, with respect to peripheral band parts 23A, 24A where the waveform peripheral grooves 23, 24 are disposed on the trunk 13.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bottle.

  As a bottle formed of a synthetic resin material in the shape of a bottomed tube, a corrugated circumferential groove that has a wave shape that extends periodically along the circumferential direction while bending in the vertical direction in a side view has been conventionally formed in the body portion. The structure which was made is known (for example, refer patent document 1).

Japanese Patent Laying-Open No. 2015-085986

  However, in such a bottle, when the inside of the bottle is depressurized, there is a case where a deformation that cannot be restored and deformed near the top of the corrugated circumferential groove may occur.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a bottle that can suppress the occurrence of a deformation that cannot be restored and deformed in the body portion during decompression of the bottle.

  The present invention employs the following means in order to solve the above problems. That is, the bottle of the present invention is a bottle formed of a synthetic resin material into a bottomed cylindrical shape, and the body portion has the bottle in a side view as viewed from the radially outer side perpendicular to the bottle axis. A corrugated circumferential groove exhibiting a wave shape extending along the circumferential direction around the bottle axis while being bent in the axial direction, and connected to or close to the top of the corrugated circumferential groove, and the corrugated circumferential groove is located in the trunk portion An auxiliary rib positioned outside the bottle axial direction with respect to the peripheral portion is formed.

  In this invention, by providing an auxiliary rib that is connected to or close to the top of the corrugated circumferential groove, a portion of the body portion that is continuous from the outside in the bottle axial direction of the peripheral band portion with respect to the top of the corrugated circumferential groove during decompression in the bottle Even if deformation occurs in the vicinity (hereinafter referred to as the vicinity of the top), it becomes easy to restore and deform, and it is possible to suppress the deformation of the body so that the deformation cannot be performed.

In the bottle of the present invention, even if the depth of the corrugated circumferential groove gradually decreases toward the top of the corrugated circumferential groove where the auxiliary rib is connected or close in the circumferential direction around the bottle shaft. Good.
In this case, by making the depth of the corrugated circumferential groove shallower toward the top part, the restoration deformation near the top part is further facilitated, and it is more certain that the deformation of the body part is impossible to be restored. Can be suppressed.

Further, in the bottle of the present invention, the corrugated circumferential grooves are formed in a plurality with the same phase while being spaced apart in the bottle axis direction, and an auxiliary rib connected to or close to the top of the corrugated circumferential groove is the bottle shaft. You may arrange | position apart from the said other waveform circumferential groove adjacent in a direction.
In the present invention, since the auxiliary rib of one corrugated circumferential groove is not connected to another corrugated circumferential groove adjacent in the bottle axial direction, the influence of deformation generated in the vicinity of the top of one corrugated circumferential groove passes through the auxiliary rib. It can suppress that it reaches other corrugated circumferential grooves, and it can suppress more certainly that a deformation | transformation of the grade which cannot be decompress | restored to a trunk | drum arises.

  According to the bottle concerning this invention, generation | occurrence | production of the deformation | transformation which cannot be decompress | restored to a trunk | drum at the time of pressure reduction in a bottle can be suppressed.

It is a side view which shows the bottle concerning one Embodiment of this invention.

  Hereinafter, an embodiment of a bottle according to the present invention will be described with reference to the drawings. In each drawing used in the following description, the scale is appropriately changed to make each member a recognizable size.

The bottle 1 according to this embodiment is a so-called decompression bottle that is sealed with a cap (not shown) after being filled with high-temperature contents, for example, polyethylene terephthalate, polyethylene naphthalate, amorphous polyester, or a blend thereof. It is made of an appropriate synthetic resin material such as a material. As shown in FIG. 1, the bottle 1 has a bottomed cylindrical shape, and has a cylindrical mouth portion 11, a cylindrical shoulder portion 12, a cylindrical body portion 13, and a bottomed cylindrical bottom portion 14. Is provided. The bottle 1 is integrally formed of a synthetic resin material.
Here, the mouth part 11, the shoulder part 12, the body part 13, and the bottom part 14 are arranged in a state where their respective central axes are located on a common axis. Hereinafter, this common axis is referred to as a bottle axis O, and the direction from the bottom 14 to the mouth 11 along the bottle axis O in FIG. In addition, a direction orthogonal to the bottle axis O in a plan view viewed from the bottle axis O is a radial direction, and a direction around the bottle axis O is a circumferential direction.

The cap is screwed into the mouth portion 11.
The shoulder portion 12 is connected to the lower end of the mouth portion 11, and has a truncated cone shape that gradually increases in diameter as the inner diameter and the outer diameter decrease downward.
The body portion 13 includes two upper and lower linear circumferential grooves 21 and 22 extending continuously over the entire circumference, and periodically along the circumferential direction while bending in the vertical direction as viewed from the outside in the radial direction. Two upper and lower corrugated circumferential grooves 23, 24 exhibiting an extending wave shape, auxiliary ribs 25, 26 extending separately from the corrugated circumferential grooves 23, 24, between the linear circumferential groove 21 and the corrugated circumferential groove 23, and a straight line Reinforcing ribs 27 and 28 are formed between the circumferential groove 22 and the corrugated circumferential groove 24, respectively.

The linear circumferential grooves 21 and 22 are formed at intervals in the vertical direction.
The corrugated circumferential grooves 23 and 24 are formed with a space in the vertical direction between the linear circumferential grooves 21 and 22, and the phases thereof coincide with each other. The upper corrugated circumferential groove 23 includes a separation mountain portion 31 that protrudes in a direction away from the upper linear circumferential groove 21 (downward) and a linear circumferential groove when the body portion 13 is viewed from the radially outer side. And an approach mountain portion 32 that protrudes in a direction approaching 21 (upward). Similarly, the lower corrugated circumferential groove 24 and the separated mountain portion 33 projecting in a direction (upward) away from the lower linear circumferential groove 22 in a side view when the body portion 13 is viewed from the radially outer side. And an approach mountain portion 34 that protrudes in a direction approaching the linear circumferential groove 22 (downward).
Further, the depths of the corrugated circumferential grooves 23 and 24 gradually become shallower from the top of the approaching mountain portions 32 and 34 toward the top of the separated mountain portions 31 and 33. For example, the depth at the top of each of the separated mountain portions 31 and 33 is about 1 mm, and the depth at the top of each of the approaching mountain portions 32 and 34 is about 2 mm.

The auxiliary rib 25 is connected to the top portion of the separation mountain portion 31 so as to be positioned below the circumferential band portion 23 </ b> A where the corrugated circumferential groove 23 is located in the body portion 13. The peripheral band portion 23 </ b> A is a portion of the body portion 13 that is sandwiched between a line connecting the tops of the separated mountain portions 31 of the corrugated circumferential groove 23 and a line connecting the tops of the separated mountain portions 31 of the corrugated circumferential groove 23. It has become. The lower end portion of the auxiliary rib 25 is positioned below the top of the separation mountain portion 33 of the corrugated circumferential groove 24 and is separated from the corrugated circumferential groove 24.
Similarly, the auxiliary rib 26 is connected to the top portion of the separation mountain portion 33 so as to be positioned above the circumferential portion 24 </ b> A where the corrugated circumferential groove 24 is located in the trunk portion 13. The circumferential band portion 24 </ b> A is a portion of the body portion 13 that is sandwiched between a line connecting the tops of the separated mountain portions 33 of the corrugated circumferential groove 24 and a line connecting the tops of the separated mountain portions 33 of the corrugated circumferential groove 24. It has become. The upper end portion of the auxiliary rib 26 is located above the top of the separation mountain portion 31 of the corrugated circumferential groove 23 and is separated from the corrugated circumferential groove 23.
The depth of the auxiliary ribs 25 and 26 is shallower than the corrugated circumferential grooves 23 and 24, and the width of the auxiliary ribs 25 and 26 is narrower than that of the corrugated circumferential grooves 23 and 24. The depth of the auxiliary rib 25 is gradually shallower as it goes downward from the separation mountain portion 31, and the depth of the auxiliary rib 26 is gradually shallower as it goes upward from the separation mountain portion 33.

The reinforcing ribs 27 and 28 are positioned separately between the linear circumferential groove 21 and the separated mountain portion 31 and between the linear circumferential groove 22 and the separated mountain portion 33, and extend linearly in the circumferential direction. It is a groove part.
A part of the reinforcing rib 27 is arranged at the same position in the vertical direction as the top of the approaching mountain portion 32. The upper end portion of the reinforcing rib 27 is located above the top portion of the approach mountain portion 32. Further, the lower end portion of the reinforcing rib 27 is located above the top portion of the separation mountain portion 31 and slightly bulges downward. Further, both circumferential end portions of the reinforcing rib 27 are spaced apart from each other in the circumferential direction from the tops of the two approaching mountain portions 32 adjacent in the circumferential direction.
Similarly, a part of the reinforcing rib 28 is arranged at the same vertical position as the top of the approaching mountain portion 34. The lower end portion of the reinforcing rib 28 is positioned below the top portion of the approaching mountain portion 34. Further, the upper end portion of the reinforcing rib 28 is located above the top portion of the separation mountain portion 33 and slightly bulges upward. Further, both circumferential end portions of the reinforcing rib 28 are spaced apart from each other in the circumferential direction from the tops of the two approaching mountain portions 34 adjacent in the circumferential direction.
The depths of the reinforcing ribs 27 and 28 are shallower than the corrugated circumferential grooves 23 and 24, and the widths of the reinforcing ribs 27 and 28 are narrower than the corrugated circumferential grooves 23 and 24.
The reinforcing ribs 27 and 28 are formed so as to be recessed toward the radially inner side, but may be formed so as to protrude toward the radially outer side.
A portion of the body portion 13 below the linear circumferential groove 22 has a truncated cone shape that gradually increases in diameter as the inner diameter and outer diameter decrease downward.

  The bottom part 14 includes a cylindrical peripheral wall part 41 whose upper end opening is connected to the lower end opening part of the body part 13 and a circular bottom wall part 42 in plan view connected to the lower end of the peripheral wall part 41. Have. Further, a circumferential groove 43 extending continuously over the entire circumference is formed between the bottom portion 14 and the body portion 13.

  According to the bottle 1 having the above-described configuration, the auxiliary ribs 25 and 26 are separately formed on the tops of the corrugated circumferential grooves 23 and 24, so that even if the body part 13 is deformed in the vicinity of the tops, this deformation It becomes easy to restore and deform. Here, the depth of the corrugated circumferential grooves 23 and 24 gradually becomes shallower toward the top of the separated mountain portions 31 and 33, and the auxiliary ribs 25 and 26 of the one corrugated circumferential groove 23 and 24 are corrugated on the other side. Since it is not connected to the approaching mountain parts 34 and 32 of the circumferential grooves 24 and 23, it can suppress more reliably that the deformation | transformation of the grade which cannot perform a deformation | transformation deformation to the whole trunk | drum 13 arises.

Next, a description will be given of the operation and effect verification test described above.
As Examples 1 to 3, a bottle provided with auxiliary ribs 25 and 26 was adopted (however, reinforcing ribs 27 and 28 were not provided). On the other hand, as Comparative Examples 1 to 3, a bottle in which the auxiliary ribs 25 and 26 were not provided was used (similarly, the reinforcing ribs 27 and 28 were not provided).
Such bottles according to Examples and Comparative Examples were filled with 87 ° C. contents at room temperature and attached with caps, then tumbled for 30 seconds, and further placed in an upright posture for 5 minutes and 30 seconds. The presence or absence of deformation of the bottle was evaluated.
Here, the “degree of decompression in the bottle” indicates the negative pressure applied to the body of the bottle when it is cooled to 26 ° C. after filling the contents. Further, the “waveform circumferential groove restoration limit point” indicates a limit point where the deformation when the bottle body is pressed is not restored after the pressure is released. That is, if the degree of decompression in the bottle is less than the corrugated circumferential groove restoration limit point, the body part is restored and deformed without being reworked, for example, by pressing the other part of the body part that is not deformed by hand or the like. It means to return to shape. Further, the “final deformation limit point” indicates a limit point that cannot be restored and deformed by rework after the deformation when pressing the body of the bottle is released.

  As shown in Table 1, in the bottle according to the example, by providing the auxiliary rib, the final deformation limit point can be improved, and the waveform circumferential groove cannot be restored depending on the negative pressure generated when the bottle is depressurized. There was no possible deformation.

In addition, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
For example, the bottle is not limited to a single-phase structure but may be a laminated structure having an intermediate layer. Examples of the intermediate layer include a layer made of a resin material having a gas barrier property, a layer made of a recycled material, or a layer made of a resin material having an oxygen absorption property.
The shoulder portion, the trunk portion, and the bottom portion have a circular cross-sectional shape orthogonal to the bottle axis, but are not limited to a circular shape, and may have other shapes such as an elliptical shape or a polygonal shape.
Reinforcing ribs may not be formed on the body portion.
Two straight circumferential grooves and two corrugated circumferential grooves are formed on the body, but it is sufficient that at least one corrugated circumferential groove is formed, and no linear circumferential groove is formed. May be.
The shape of the corrugated circumferential groove is a shape in which the separated ridges and the approaching ridges alternately and periodically extend, but it is not necessary to be periodic, and other shapes such as a sawtooth shape Also good.
The corrugated circumferential grooves may not be formed so that the phases thereof match each other.
The auxiliary rib is formed only at the top of the separated mountain portion, but may be formed at the top of the approaching mountain portion.
The auxiliary ribs are connected to the corrugated circumferential groove, but need not be connected as long as they are at least close to each other. In addition, the auxiliary rib is not connected to another corrugated circumferential groove adjacent in the vertical direction, but may be connected.
The auxiliary ribs are formed in a straight line extending in the vertical direction, but may have other shapes. Similarly, the reinforcing rib is formed in a linear shape extending in the circumferential direction, but may have other shapes. You may change suitably the depth of a reinforcement rib and an auxiliary rib.

  According to this invention, industrial applicability is recognized regarding the bottle which can suppress generation | occurrence | production of the deformation | transformation which cannot decompress | restorate and deform | transform into a trunk | drum at the time of pressure reduction in a bottle.

1 bottle, 13 trunk, 23, 24 corrugated circumferential groove, 23A, 24A circumferential band portion, 25, 26 auxiliary rib, O bottle shaft

Claims (3)

A bottle formed of a synthetic resin material in a bottomed cylindrical shape,
A corrugated circumferential groove having a corrugated shape extending in a circumferential direction around the bottle axis while being bent in the bottle axis direction in a side view when the bottle is viewed from the radially outer side orthogonal to the bottle axis. And an auxiliary rib that is connected to or close to the top of the corrugated circumferential groove and that is located on the outer side in the bottle axial direction with respect to the peripheral portion of the trunk where the corrugated circumferential groove is located. Characterized by the bottle.   2. The depth of the corrugated circumferential groove is gradually shallower toward a top of the corrugated circumferential groove where the auxiliary rib is connected or close in a circumferential direction around the bottle shaft. Bottles. A plurality of the corrugated circumferential grooves are formed to be spaced apart in the bottle axial direction and aligned in phase,
The bottle according to claim 1, wherein auxiliary ribs connected to or adjacent to the top of the corrugated circumferential groove are disposed apart from other corrugated circumferential grooves adjacent in the bottle axial direction. .

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