JP2012111546A - Bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bottle capable of improving evacuation absorbing performance in the bottle.SOLUTION: In the bottle 1, the bottom wall 19 of a part 14 comprises a ground contacting part 18 which is located at an outer peripheral edge, a raised circumferential wall 21 which is connected to the ground contacting part from the inside in the bottle diameter direction and extended toward the upper side, an annular movable wall 22 which projects toward the inside in the bottle diameter direction from the upper end of the raised circumferential wall, and an indented circumferential wall 23 extending upward from the inner end in the bottle diameter direction of the movable wall where the movable wall is freely arranged so as to be turnable around a connection part 25 with the raised circumferential part so as to move the indented circumferential part upward, and the raised circumferential part is extended so as to be gradually inclined toward the inside in the bottle diameter direction as it approaches the connection part from the ground contacting part where the inclination angle θ1 forms an angle of 0° or larger and smaller than 20° with respect to the bottle axis O, and a height T from the ground contacting part to the connection part is set to be 3.5 mm or higher and 7.5 mm or lower.

Description

  The present invention relates to a bottle.

  Conventionally, as a bottle formed into a bottomed cylindrical shape with a synthetic resin material, for example, as shown in Patent Document 1 below, the bottom wall portion of the bottom portion is connected to a grounding portion located on the outer peripheral edge portion, and the grounding portion. A rising peripheral wall portion extending from the inside in the bottle radial direction and extending upward; a movable wall portion protruding from the upper end portion of the rising peripheral wall portion toward the inside in the bottle radial direction; and an inner portion of the movable wall portion in the bottle radial direction. A bottle by rotating around a connecting portion with the rising peripheral wall so that the movable wall moves the depressed peripheral wall upward. A configuration that absorbs the reduced pressure inside is known.

JP 2010-126184 A

  However, the conventional bottle has room for improvement with respect to improving the vacuum absorption performance in the bottle.

  Therefore, the present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a bottle capable of improving the vacuum absorption performance in the bottle.

In order to achieve the above object, the present invention provides the following means.
(1) A bottle according to the present invention is a bottle formed of a synthetic resin material in a bottomed cylindrical shape, wherein a bottom wall portion of the bottom portion is positioned on an outer peripheral edge portion, and a bottle diameter is provided on the grounding portion. A rising peripheral wall portion extending from the inner side in the direction and extending upward; an annular movable wall portion projecting inward from the upper end portion of the rising peripheral wall portion toward the inner side in the bottle radial direction; A depressed peripheral wall portion extending upward from the end portion, and the movable wall portion is rotatable about a connecting portion with the rising peripheral wall portion so as to move the depressed peripheral wall portion upward. The rising peripheral wall portion extends so as to gradually incline inward in the bottle radial direction from the grounding portion toward the connection portion with the movable wall portion, and the inclination angle thereof is 0 ° or more and less than 20 ° to the axis The height from the grounding portion to the connecting portion between the rising peripheral wall portion and the movable wall portion is 3.5 mm or more and 7.5 mm or less.

  According to the bottle of the present invention, when the inside of the bottle is depressurized, the depressed peripheral wall portion moves upward by the rotation of the movable wall portion, so that the depressurization can be absorbed. By the way, it is considered that the movable wall portion rotates around the connecting portion with the rising peripheral wall portion due to the diameter expansion due to the upper end portion of the rising peripheral wall portion moving outward in the bottle radial direction.

Here, in the bottle according to the present invention, as the rising peripheral wall portion moves toward the connection portion with the movable wall portion, the bottle is inclined inward in the bottle radial direction within the range of the inclination angle with respect to the bottle axis, and is grounded. The height from the part to the connection part is set in the height range. For this reason, the rising peripheral wall portion is easy to move flexibly in the bottle radial direction with the upper end portion, which is a connection portion with the movable wall portion, as a base point, and thereby the upper end portion moves outward in the bottle radial direction during the decompression. It is thought that it becomes easy.
Therefore, the movable wall portion can be flexibly rotated while following the internal pressure change in the bottle with high sensitivity, and the reduced pressure absorption performance can be improved.

  When the inclination angle of the rising peripheral wall portion is 20 ° or more and the height from the grounding portion to the connection portion between the rising peripheral wall portion and the movable wall portion is less than 3.5 mm, the upper end of the rising peripheral wall portion While the portion is difficult to move in the bottle radial direction, it is considered that the ground contact portion located on the lower end side of the rising peripheral wall portion is likely to move in the bottle radial direction. For this reason, at the time of decompression, the ground contact portion is more easily moved to the outside in the bottle radial direction than the upper end portion of the rising peripheral wall portion, which may hinder the rotation of the movable wall portion.

(2) In the bottle according to the present invention, the movable wall portion gradually extends downward from the connection portion with the rising peripheral wall portion toward the inside in the bottle radial direction, and the movable wall portion The angle between the rising peripheral wall portion is 60 ° or more and 85 ° or less.

  In this case, since the angle formed by the movable wall portion and the rising peripheral wall portion is within the above-described range, the above-described operational effect, i.e., flexibly while allowing the movable wall portion to follow the internal pressure change in the bottle with high sensitivity. The point which improves the decompression absorption performance by rotating can be remarkably exerted. In addition, since the movable wall portion gradually extends downward from the connecting portion with the rising peripheral wall portion toward the inside in the bottle radial direction, the movable wall portion is rotated downward when filling the contents. Easy to move. For this reason, the volume in the bottle can be increased to increase the vacuum absorption capacity immediately after filling, thereby easily further improving the vacuum absorption performance.

  According to the bottle according to the present invention, the reduced-pressure absorption performance in the bottle can be improved.

It is a side view of the bottle in the embodiment of the present invention. It is a bottom view of the bottle shown in FIG. It is sectional drawing of the bottle along the AA line shown in FIG. It is sectional drawing of the bottle along the BB line shown in FIG. It is a bottom view of the bottle which shows the modification which concerns on this invention. It is sectional drawing of the bottle along the CC line shown in FIG.

Hereinafter, bottles according to embodiments of the present invention will be described with reference to the drawings.
The bottle 1 which concerns on this embodiment is provided with the mouth part 11, the shoulder part 12, the trunk | drum 13, and the bottom part 14 as shown in FIGS. 1-3, and these have located each central axis on the common axis The schematic configuration is arranged in this order.

Hereinafter, the common axis is referred to as a bottle axis O, and the mouth 11 side is referred to as the upper side and the bottom 14 side is referred to as the lower side along the bottle axis O direction. A direction perpendicular to the bottle axis O is referred to as a bottle radial direction, and a direction around the bottle axis O is referred to as a bottle circumferential direction.
The bottle 1 is formed by blow molding a preform formed into a bottomed cylinder by injection molding, and is integrally formed of a synthetic resin material. A cap (not shown) is screwed into the mouth portion 11. Further, the mouth portion 11, the shoulder portion 12, the trunk portion 13, and the bottom portion 14 each have a circular cross-sectional view shape orthogonal to the bottle axis O.

Between the shoulder part 12 and the trunk | drum 13, the 1st annular groove 15 is formed continuously over the perimeter.
The body portion 13 is formed in a cylindrical shape and has a smaller diameter than a lower end portion of the shoulder portion 12 and a heel portion 17 described later of the bottom portion 14. A plurality of second annular grooves 16 are formed in the body portion 13 at intervals in the bottle axis O direction. In the illustrated example, four second annular grooves 16 are formed at equal intervals in the bottle axis O direction. Each of these second annular grooves 16 is a groove formed continuously over the entire circumference of the body portion 13.

  The bottom portion 14 has a heel portion 17 whose upper end opening is connected to the lower end opening portion of the body portion 13, and a bottom wall portion 19 that closes the lower end opening portion of the heel portion 17 and whose outer peripheral edge portion is a grounding portion 18. Are formed in a cup shape.

  Of the heel portion 17, a heel lower end portion 27 connected to the ground contact portion 18 from the outside in the bottle radial direction is formed to have a smaller diameter than an upper heel portion 28 connected to the heel lower end portion 27 from above. The upper heel portion 28 is the maximum outer diameter portion of the bottle 1 together with the lower end portion of the shoulder portion 12.

  Further, the connecting portion 29 between the heel lower end portion 27 and the upper heel portion 28 is gradually reduced in diameter from the upper side toward the lower side, whereby the heel lower end portion 27 has a smaller diameter than the upper heel portion 28. Further, the upper heel portion 28 is formed with a third annular groove 20 having substantially the same depth as the second annular groove 16 continuously over the entire circumference.

  As shown in FIG. 3, the bottom wall portion 19 is connected to the ground contact portion 18 from the inside in the bottle radial direction and extends upward, and extends upward from the upper end portion of the rising peripheral wall portion 21 toward the inside in the bottle radial direction. And an annular movable wall portion 22 that protrudes upward, and a depressed peripheral wall portion 23 that extends upward from the inner end portion of the movable wall portion 22 in the bottle radial direction.

  The movable wall portion 22 is formed in a curved shape protruding downward, and gradually extends downward from the outside in the bottle radial direction toward the inside. The movable wall portion 22 and the rising peripheral wall portion 21 are connected via a curved surface portion 25 that protrudes upward. The movable wall portion 22 is rotatable around the curved surface portion (connection portion with the rising peripheral wall portion 21) 25 so as to move the depressed peripheral wall portion 23 upward.

  The rising peripheral wall portion 21 is gradually reduced in diameter from the lower side toward the upper side. Specifically, it extends so as to incline toward the inner side in the bottle radial direction from the grounding portion 18 toward the curved surface portion 25 that is a connecting portion with the movable wall portion 22, and the inclination angle θ <b> 1 is the bottle angle. With respect to the axis O, the angle range is 0 ° or more and less than 20 °, for example, 10 °.

  In the present embodiment, the height T from the grounding portion 18 to the curved surface portion 25 is, for example, 5 mm, which is within a height range of 3.5 mm or more and 7.5 mm or less. Furthermore, an angle θ2 formed by the movable wall portion 22 and the rising peripheral wall portion 21 is set to, for example, 73 ° within an angle range of 60 ° to 85 °.

Further, as shown in FIGS. 2 and 4, a plurality of ribs 40 are radially arranged around the bottle axis O on the movable wall portion 22. That is, the ribs 40 are arranged at equal intervals along the bottle circumferential direction.
In the illustrated example, the rib 40 is configured by a plurality of concave portions 40a that are recessed in a curved shape upward and intermittently and linearly extend along the bottle radial direction. Thereby, as for the rib 40, the longitudinal cross-sectional view shape along a bottle radial direction is formed in the waveform.

The respective recesses 40a are formed in the same shape and size, and are arranged at equal intervals along the bottle radial direction. And in each of the some rib 40, each position along the bottle radial direction in which the some recessed part 40a is arrange | positioned is the same.
In each rib 40, among the plurality of concave portions 40a, the concave portion 40a located on the outermost side in the bottle radial direction is adjacent to the curved surface portion 25 from the inner side in the bottle radial direction, and the concave portion 40a located on the innermost side in the bottle radial direction. However, it adjoins to the depression surrounding wall part 23 from the outer side of a bottle radial direction.

As shown in FIG. 3, the depressed peripheral wall portion 23 is disposed coaxially with the bottle shaft O and is formed in a circular shape in a cross-sectional view that gradually increases in diameter from the upper side toward the lower side. A disc-shaped top wall 24 disposed coaxially with the bottle axis O is connected to the upper end portion of the depressed peripheral wall portion 23, and the entire depressed peripheral wall portion 23 and the top wall 24 form a top tube shape. Yes.
The depressed peripheral wall portion 23 includes a curved wall portion 23 a that is formed in a curved shape protruding toward the inside in the bottle radial direction, and whose upper end portion is connected to the outer peripheral edge portion of the top wall 24. The curved wall portion 23a is connected to the inner end portion of the movable wall portion 22 in the bottle radial direction via a curved surface portion 26 having a lower end projecting downward.

  When the inside of the bottle 1 configured as described above is depressurized, the movable wall portion 22 rotates upward about the curved surface portion 25 of the bottom wall portion 19, so that the movable wall portion 22 moves to the depressed peripheral wall portion 23. Move to lift upwards. That is, the inner wall pressure change (decompression) of the bottle 1 can be absorbed by positively deforming the bottom wall portion 19 of the bottle 1 during decompression.

By the way, at the time of the pressure reduction, the movable wall portion 22 rotates around the curved surface portion 25 that is a connecting portion with the rising peripheral wall portion 21 because the upper end portion of the rising peripheral wall portion 21 moves outward in the bottle radial direction. It is thought to do.
Here, in the bottle 1 of the present embodiment, the rising peripheral wall portion 21 is inclined inward in the bottle radial direction at the inclination angle θ1 with respect to the bottle axis O as it goes toward the curved surface portion 25, and is curved from the grounding portion 18. The height to the portion 25 is the height T, and the angle formed between the rising peripheral wall portion 21 and the movable wall portion 22 is the angle θ2.

For this reason, the rising peripheral wall portion 21 has an upper end portion that is a connection portion with the movable wall portion 22 that can move flexibly in the bottle radial direction with the grounding portion 18 as a base point. It is thought that it becomes easy to move. Therefore, the movable wall portion 22 can be flexibly rotated while following the internal pressure change in the bottle 1 with high sensitivity, and the reduced pressure absorption performance can be improved.
In addition, since the movable wall portion 22 gradually extends downward from the curved surface portion 25 that is a connecting portion with the rising peripheral wall portion 21 toward the inside in the bottle radial direction, the movable wall portion is filled when the contents are filled. It is easy to rotate the portion 22 downward. Therefore, the volume in the bottle 1 can be increased to increase the reduced pressure absorption capacity immediately after filling, thereby easily improving the reduced pressure absorption performance.

  In addition, since the several rib 40 is formed in the movable wall part 22 of the bottom wall part 19, the surface area of the movable wall part 22 can be increased and a pressure receiving area can be increased, and the internal pressure change of the bottle 1 is made into the movable wall part 22. It can be deformed in response to the prompt.

  Moreover, the bottle 1 of this embodiment is suitable for a bottle having an internal volume of 1 liter or less and a grounding diameter of 85 mm or less.

  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 ribs 40 are intermittently extended radially. However, the present invention is not limited to this, and the ribs 40 may be continuously extended or may be curvedly extended. In addition, the shape and size of the recess 40a can be appropriately changed. The ribs 40 are not essential and may not be provided.

Moreover, as shown in FIG.5 and FIG.6, you may form the uneven | corrugated | grooved part 41 in the standing | starting-up | periphery wall part 21 over a perimeter. In addition, this uneven | corrugated | grooved part 41 is comprised by the convex part 41a formed in the curved surface shape which protruded toward the inner side of the bottle radial direction being arranged in multiple numbers at intervals in the bottle circumferential direction.
By forming the concavo-convex portion 41 in this manner, for example, light incident on the rising peripheral wall portion 21 is irregularly reflected by the concavo-convex portion 41, or the contents in the bottle 1 are also filled in the concavo-convex portion 41. Therefore, it is difficult to feel uncomfortable when looking at the bottom 14 of the bottle 1 filled with the contents.

In the above embodiment, the angle θ2 formed by the rising peripheral wall portion 21 and the movable wall portion 22 is configured to fall within an angle range of 60 ° or more and 85 ° or less. However, the present invention is not limited to this angle range. Absent. For example, the movable wall portion 22 may be appropriately changed such as projecting in parallel along the bottle radial direction, or inclined upward, or may be formed in a planar shape or a concave curved shape that is recessed upward. It may be changed as appropriate.
However, as in the above-described embodiment, the angle θ2 formed by the rising peripheral wall portion 21 and the movable wall portion 22 is within an angle range of 60 ° to 85 °, and the movable wall portion 22 is inclined downward. preferable. By doing so, it is easy to improve the rotation performance of the movable wall portion 22 and improve the vacuum absorption performance.

In the above embodiment, the rising peripheral wall portion 21 and the movable wall portion 22 are connected via the curved surface portion 25. However, the connecting portion is extended outward in the bottle radial direction following the surface shape of the movable wall portion 22. Alternatively, an annular recess recessed upward with respect to the virtual line may be formed, and the movable wall portion 22 may be configured to be rotatable around the annular recess. In this case, since a high hinge effect can be expected by providing flexibility at the radially outer end portion of the movable wall portion 22, the flexible wall portion 22 can be flexibly made to follow changes in internal pressure in the bottle 1 with higher sensitivity. It can be deformed and the vacuum absorption performance in the bottle 1 can be further improved.
Even when this annular groove is formed, the angle formed between the rising peripheral wall portion 21 and the movable wall portion 22, more specifically, the angle θ2 formed between the rising peripheral wall portion 21 and the imaginary line is 60 ° or more. The angle is preferably within an angle range of 85 ° or less.

  Moreover, in the said embodiment, although the cross-sectional view shape orthogonal to each bottle axis | shaft O of the shoulder part 12, the trunk | drum 13, and the bottom part 14 was made into circular shape, it does not restrict to this, for example, changes suitably, such as polygonal shape You may do it.

  The synthetic resin material forming the bottle 1 may be appropriately changed, for example, polyethylene terephthalate, polyethylene naphthalate, amorphous polyester, or a blend material thereof. Further, the bottle 1 is not limited to a single layer structure, and 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.

(Example)
Next, the inclination angle θ1 of the rising peripheral wall portion 21 and the height T from the ground contact portion 18 to the curved surface portion 25 are changed, and the relationship between the reduced pressure strength (kPa) and the reduced pressure absorption capacity (ml) is obtained. An example of testing (analyzing) how it changes will be described.
In addition, this test was done using the bottle 1 shown in FIGS. 1 to 4 in which a plurality of ribs 40 are formed on the movable wall portion 22.

  In this test, a first pattern in which the inclination angle θ1 is 5 ° and the height T is 3.5 mm, a second pattern in which the inclination angle θ1 is 10 ° and the height T is 3.5 mm, There are a total of four patterns: a third pattern in which the tilt angle θ1 is 15 ° and the height T is 3.5 mm, and a comparative pattern in which the tilt angle θ1 is 20 ° and the height T is 3.5 mm. Each was tested.

As a result, it was confirmed that the reduced pressure absorption capacity increased in any of the four patterns at the initial stage where the reduced pressure intensity began to increase. This is considered because the whole bottom wall part 19 moved upward by the pressure reduction in the bottle 1.
However, after that, when the reduced pressure strength further increased and reached approximately 10 (kPa), it was confirmed that the reduced pressure absorption capacity increased rapidly for the first to third patterns. This is because the inclination angle θ1 is in the angle range of 0 ° or more and less than 20 °, and the height T is in the height range of 3.5 mm or more and 7.5 mm or less, so that the movable wall portion It can be considered that 22 smoothly rotated and reversed and deformed, thereby moving the depressed peripheral wall portion 23 upward.
On the other hand, in the case of the comparative pattern, even when the reduced pressure strength was further increased, a sudden increase phenomenon of the reduced pressure absorption capacity due to the reverse deformation of the movable wall portion 22 was not observed. .

In the first to third patterns, even when the height T is 5.0 mm instead of 3.5 mm, and the inclination angle θ1 is 5 °, 10 °, 15 °, and 20 °, Similarly, it was confirmed that the reduced pressure absorption capacity increased rapidly when the reduced pressure strength reached approximately 10 (kPa).
Further, the same change was confirmed even when the height T was 7.5 mm and the inclination angle θ1 was 5 °, 10 °, 15 °, and 20 °. Further, even when the inclination angle θ1 was set to 0 °, a sudden increase in the reduced pressure absorption capacity was observed within the height range.
However, if the tilt angle θ1 is less than 0 ° (minus), there arises a problem that molding becomes difficult.

  From the above, the inclination angle θ1 of the rising peripheral wall portion 22 is in the angle range of 0 ° or more and less than 20 °, and the height T from the ground contact portion 18 to the curved surface portion 25 is 3.5 mm or more and 7.5 mm or less. It was confirmed that the reduced-pressure absorption performance was improved by flexibly deforming the movable wall portion 22 by setting the height within the above range.

O: Bottle shaft T: Height from the ground contact part to the curved surface part θ1: Inclination angle of the rising peripheral wall part θ2: Angle formed by the movable wall part and the rising peripheral wall part 1 ... Bottle 12 ... Shoulder part 18 ... Grounding part 19 ... Bottom part Bottom wall portion 21 ... rising peripheral wall portion 22 ... movable wall portion 23 ... depressed peripheral wall portion 25 ... curved surface portion (connection portion between movable wall portion and rising peripheral wall portion)

Claims (2)

A bottle formed of a synthetic resin material in a bottomed cylindrical shape,
The bottom wall of the bottom
A grounding portion located at the outer periphery,
A rising peripheral wall portion extending from the inside in the bottle radial direction to the grounding portion and extending upward;
An annular movable wall portion projecting inward from the upper end portion of the rising peripheral wall portion in the bottle radial direction;
A depressed peripheral wall portion extending upward from an inner end portion in the bottle radial direction of the movable wall portion,
The movable wall portion is rotatably arranged around a connection portion with the rising peripheral wall portion so as to move the depressed peripheral wall portion upward.
The rising peripheral wall portion extends so as to be gradually inclined inward in the bottle radial direction from the grounding portion toward the connection portion with the movable wall portion, and the inclination angle is 0 with respect to the bottle axis. Make an angle of more than 20 ° and less than 20 °,
A bottle having a height from the grounding portion to the connecting portion between the rising peripheral wall portion and the movable wall portion is 3.5 mm or more and 7.5 mm or less. The bottle according to claim 1,
The movable wall portion gradually extends downward from the connecting portion with the rising peripheral wall portion toward the inner side in the bottle radial direction, and an angle formed by the movable wall portion and the rising peripheral wall portion is 60 °. As mentioned above, the bottle characterized by being 85 degrees or less.

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