JP5645603B2 - Bottle - Google Patents

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, in the conventional bottle, there is a possibility that the shoulder portion may be deformed, for example, dented to the inside of the bottle when the bottle is depressurized.

  Therefore, the present invention has been made in view of such circumstances, and an object of the present invention is to provide a bottle whose shoulder is difficult to deform during decompression.

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. In the shoulder portion, two reinforcing grooves are formed over the entire circumference at intervals in the bottle axis direction .

  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, since the reinforcing groove is formed in the shoulder portion, and thereby the rigidity of the shoulder portion is reinforced, it is difficult to cause unauthorized deformation such as the shoulder portion being recessed inside the bottle at the time of decompression. Therefore, the appearance defect of the bottle can be eliminated and the quality can be easily maintained.

(2) In the bottle according to the present invention, the body portion may be formed with a plurality of circumferential grooves that increase the rigidity of the body portion over the entire circumference with a space in the bottle axial direction.

  In this case, since the rigidity of the body portion is also strengthened, it is difficult to cause unauthorized deformation such as indentation of not only the shoulder portion but also the body portion inside the bottle during decompression of the bottle. Moreover, since the rigidity with respect to the lateral load of the body portion can be secured, it is difficult for the body portion to be illegally deformed such as bending.

(3) In the bottle according to the present invention, the circumferential groove may make the body portion shrinkable and deformable in the bottle axial direction when the bottle is decompressed.

  In this case, at the time of decompression in the bottle, in addition to being able to absorb the decompression by the movement of the depressed peripheral wall portion due to the rotation of the movable wall portion, it is possible to further absorb the decompression by the deformation of the body portion, The vacuum absorption performance in the bottle can be further improved.

  According to the bottle of the present invention, deformation of the shoulder portion can be suppressed during decompression, and a high-quality bottle can be obtained without appearance defects.

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.

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.

The shoulder 12 is gradually enlarged in diameter from the upper side toward the lower side, and is formed in a curved surface shape protruding toward the outer side in the bottle radial direction. Further, the length of the shoulder portion 12 along the bottle axis O direction is longer than the length of the heel portion 17 described later in the bottle axis O direction, and about 70% of the length of the body portion 13 in the bottle axis O direction. Has been.
The shoulder portion 12 is formed with two reinforcing grooves 10 over the entire circumference at intervals in the bottle axis O direction. These reinforcing grooves 10 are grooves (concave ribs) for increasing the rigidity of the shoulder 12.

  The body portion 13 is formed in a cylindrical shape, and a portion between both end portions in the bottle axis O direction is formed with a smaller diameter than these both end portions. A plurality of first annular grooves (circumferential grooves) 15 are formed in the body portion 13 at intervals in the bottle axis O direction. In the illustrated example, four first annular grooves 15 are formed at equal intervals in the bottle axis O direction. Each of the first annular grooves 15 is a groove formed continuously over the entire circumference of the body portion 13 to increase the rigidity of the body portion 13 and at the time of decompression in the bottle 1, the body portion 13 is moved to the bottle axis O. It is possible to shrink and deform in the direction.

A second annular groove 20 is continuously formed over the entire circumference at the connecting portion between the body portion 13 and the bottom portion 14.
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 both end portions of the body portion 13 in the bottle axis O direction.
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.

  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 rising peripheral wall portion 21 is gradually reduced in diameter from the lower side toward the upper side.
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.

Further, 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.

The depressed peripheral wall portion 23 is disposed coaxially with the bottle axis 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 is formed in a curved shape protruding toward the inner side in the bottle radial direction, and an upper end portion thereof is connected to the outer peripheral edge portion of the top wall 24 via a curved wall portion 23a and a bent portion 23b. And an inclined wall portion 23c that is connected to the lower end portion of the curved wall portion 23a. The inclined wall portion 23c gradually increases in diameter from the upper side toward the lower side, and a lower end portion thereof is provided continuously to an inner end portion in the bottle radial direction of the movable wall portion 22 via a curved surface portion 26 protruding downward. Yes.

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.
In addition, since the plurality of first annular grooves 15 are formed in the body portion 13, the body portion 13 is easily contracted and deformed in the bottle axis O direction. Therefore, in addition to the reduced pressure absorption due to the deformation of the bottom wall portion 19, the internal pressure change of the bottle 1 can be further absorbed by utilizing the deformation of the body portion 13, so that the reduced pressure absorption performance in the bottle 1 can be improved. .

By the way, since the reinforcing groove 10 is formed in the shoulder portion 12 and thereby the rigidity of the shoulder portion 12 is strengthened, the shoulder portion 12 is recessed inside the bottle 1 when the bottle 1 is decompressed. Hard to cause deformation. Further, since the first annular concave groove 15 is also formed on the body portion 13, the rigidity is also enhanced, and it is difficult to cause unauthorized deformation such as the body portion 13 being recessed inside the bottle 1 during decompression.
From these things, the external appearance defect of the bottle 1 can be eliminated and it can be set as the high quality bottle 1. FIG. In addition, since the first annular concave groove 15 can ensure the rigidity of the body portion 13 with respect to the lateral load, the body portion 13 is unlikely to be bent or deformed.

  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.

  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 embodiment described above, the two reinforcing grooves 10 are formed in the shoulder portion 12, but one or three or more may be formed.
In addition, the first annular groove 15 is formed so that the body 13 can be contracted and deformed in the bottle axis O direction. However, the recess 15 may not be provided, and the body 13 can be contracted and deformed. It doesn't have to be. When the first annular groove 15 is formed in this way, negative pressure (decompression) generated in the bottle 1 can be absorbed not only by the movable wall portion 22 but also by deformation of the body portion 13. Furthermore, the influence of the negative pressure on the shoulder 12 can be suppressed.

Moreover, although the rib 40 was intermittently extended radially in the said embodiment, you may extend not only this but continuously, and you may make it curve and extend. In addition, the shape and size of the recess 40a can be appropriately changed.
The rising peripheral wall portion 21 may be appropriately changed, for example, extending in parallel along the bottle axis O direction. Further, the movable wall portion 22 may be changed as appropriate, for example, by projecting in parallel along the bottle radial direction, or by tilting upward. Furthermore, the movable wall portion 22 may be appropriately changed, for example, formed in a planar shape or a concave curved shape that is recessed upward.

  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.

  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.

O ... Bottle shaft 1 ... Bottle 10 ... Reinforcement groove 12 ... Shoulder part 13 ... Body part 14 ... Bottom part 15 ... Second concave groove part (circumferential groove)
DESCRIPTION OF SYMBOLS 18 ... Grounding part 19 ... Bottom wall part of bottom part 21 ... Standing peripheral wall part 22 ... Movable wall part 23 ... Depressed peripheral wall part 25 ... Curved surface part (connection part of movable wall part and rising peripheral wall part)

Claims (3)

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.
A bottle characterized in that two reinforcing grooves are formed on the shoulder portion over the entire circumference with an interval in the bottle axial direction . The bottle according to claim 1,
A bottle characterized in that a plurality of circumferential grooves for increasing the rigidity of the body part are formed in the body part over the entire circumference at intervals in the bottle axial direction. The bottle according to claim 2,
The said circumferential groove makes the said trunk | drum shrinkable and deformable to a bottle axial direction at the time of pressure reduction in a bottle, The bottle characterized by the above-mentioned.

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