JP2018162087A - Decompression absorption bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly rotate a movable wall part upward over the whole circumference under negative pressure after sealed.SOLUTION: A bottom wall part 19 of a bottom part 14 includes: a grounding part 18 positioned on an outer peripheral edge; a standing peripheral wall part 21 continuing from the inside in a bottle radial direction to the grounding part and extending upward; an annular movable wall part 22 extending from an upper end part of the standing peripheral wall part to the inside in the bottle radial direction; and a central wall part 23 continuing to an inner end part in the bottle radial direction of the movable wall part. The movable wall part is disposed rotatably together with the central wall part in a vertical direction around a connection part 25 with the standing peripheral wall part, and includes a curved part 27 forming a curve surface protruding downward. The curved part continues to an outer end part of the central wall part in the bottle radial direction. A lowermost part 27a positioned the most lowest part of the curved part is disposed at a part which positions at the outside in the bottle radial direction than a middle position 27b of the curved part in the bottle radial direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vacuum absorbing bottle.

Conventionally, as a vacuum absorption bottle formed of a synthetic resin material in a bottomed cylindrical shape, for example, as shown in Patent Document 1 below, a bottom wall portion of a bottom portion is located on an outer peripheral edge portion, and a grounding portion A rising peripheral wall portion extending from the inner side in the bottle radial direction and extending upward, an annular movable wall portion extending from the upper end portion of the rising peripheral wall portion toward the inner side in the bottle radial direction, and an inner side of the movable wall portion in the bottle radial direction. A central wall portion connected to the end portion, and the movable wall portion is configured to absorb the decompression in the bottle by rotating upward with the central wall portion around the connection portion with the rising peripheral wall portion. Are known.
In this type of vacuum absorption bottle, in order to ensure the vacuum absorption capacity after filling the contents, the bottom wall portion is deformed and the central wall portion is displaced downward when filling the contents. .

JP 2013-23278 A

However, in the conventional reduced pressure absorption bottle, there is a possibility that the movable wall portion is difficult to turn upward evenly over the entire circumference at the time of negative pressure after sealing.
In this case, not only the appearance of the vacuum absorption bottle is deteriorated, but also the liquid surface height position varies depending on the vacuum absorption bottle even though the same amount of contents are filled. There is.

  Therefore, an object of the present invention is to provide a reduced pressure absorption bottle capable of rotating the movable wall portion upward uniformly over the entire circumference at the time of negative pressure after sealing.

  The present invention employs the following means in order to solve the above problems. That is, the reduced-pressure absorption bottle of the present invention is a bottomed cylindrical reduced-pressure absorption bottle formed of a synthetic resin material, and the bottom wall portion of the bottom portion is disposed on the outer peripheral edge portion and the grounding portion. A rising peripheral wall portion extending from the inner side in the bottle radial direction and extending upward, an annular movable wall portion extending from the upper end portion of the rising peripheral wall portion toward the inner side in the bottle radial direction, and a bottle radial direction of the movable wall portion A central wall continuous to the inner end, and the movable wall is disposed so as to be rotatable in the vertical direction together with the central wall around the connecting portion with the rising peripheral wall, and downward A curved portion that protrudes toward the curved surface, and the curved portion is connected to an outer end portion of the central wall portion in the bottle radial direction, and the lowermost portion of the curved portion located at the lowermost position is the curved portion. At the center of the bottle radial direction Characterized in that it is arranged in a portion located outside the bottle radial Ri.

  In the present invention, in the curved portion connected to the outer end portion in the bottle radial direction in the central wall portion, the lowermost portion is disposed at a portion located on the outer side in the bottle radial direction from the central position in the bottle radial direction. The distance in the bottle radial direction between the lowermost portion and the outer end portion in the bottle radial direction at the central wall portion is secured long. Therefore, in combination with the increase in the radius of curvature of the inner peripheral portion connected to the central wall portion of the curved portion, the lowermost portion of the curved portion at the time of displacement toward the lower side of the central wall portion due to the filling of the contents It becomes possible to suppress that it deform | transforms so that it may become sharp toward the downward direction, and at the time of the negative pressure after sealing, a movable wall part can be uniformly turned upwards over a perimeter.

Here, the central wall portion may extend upward from an inner end portion of the movable wall portion in the bottle radial direction.
In this case, the central wall portion extends upward from the inner end portion of the movable wall portion in the radial direction of the bottle, and the bottle in the movable wall portion is displaced in the downward direction of the central wall portion due to the filling of the contents. Since the inner end portion in the radial direction is easily deformed, the above-described effects are effectively achieved.

  According to this invention, at the time of negative pressure after sealing, the movable wall portion can be uniformly rotated upward over the entire circumference.

It is a partial cross section side view of the decompression absorption bottle shown as one embodiment concerning the present invention. It is a semi-longitudinal sectional view of the bottom part of the reduced pressure absorption bottle shown in FIG. It is a half longitudinal cross-sectional view of the bottom part of the vacuum absorption bottle shown as other embodiment which concerns on this invention.

Hereinafter, a reduced pressure absorption bottle according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the reduced pressure absorption bottle 1 according to the present embodiment includes a mouth portion 11, a shoulder portion 12, a trunk portion 13, and a bottom portion 14, and these 11 to 14 have their central axes on a common axis. It is the schematic structure which was arranged in this order in the state located in.

Hereinafter, the common axis is referred to as the bottle axis O, the mouth 11 side along the bottle axis O direction is referred to as the upper side, the bottom 14 side is referred to as the lower side, the direction along the bottle axis O is referred to as the vertical direction, A direction perpendicular to the bottle axis O when viewed from the direction 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 vacuum absorbing 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 attached to the mouth portion 11. Each of the mouth portion 11, the shoulder portion 12, the body portion 13, and the bottom portion 14 has a circular cross-sectional shape orthogonal to the bottle axis O.

The trunk | drum 13 is formed in a cylinder shape, and the intermediate part between an upper end part and a lower end part is formed in the diameter smaller than an upper end part and a lower end part.
A connection portion between the shoulder portion 12 and the body portion 13 is formed with a first annular groove 16 extending continuously over the entire circumference. A plurality of second annular grooves 15 extending continuously around the entire circumference are formed in the body portion 13 at intervals in the vertical direction. A third annular concave groove 20 that extends continuously over the entire circumference is formed at a connection portion between the body portion 13 and the bottom portion 14.
The bottom portion 14 has a cylindrical heel portion 17 whose upper end opening portion is connected to the lower end opening portion of the body portion 13, a bottom portion which closes the lower end opening portion of the heel portion 17 and whose outer peripheral edge portion is a grounding portion 18. And a wall portion 19. The heel portion 17 is formed with a fourth annular groove 31 continuously over the entire circumference.

  As shown in FIG. 2, 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 extends and a central wall portion 23 that is continuous with the inner end portion of the movable wall portion 22 in the bottle radial direction.

The rising peripheral wall portion 21 extends substantially straight along the vertical direction. The rising peripheral wall portion 21 may extend in parallel with the bottle axis O, and in consideration of releasability with respect to the mold, the rising peripheral wall portion 21 may be gradually extended toward the inside in the bottle radial direction from the bottom to the top. You may make it incline 5 degrees or less with respect to a direction, Preferably it is 2 degrees or less. In the illustrated example, the inclination angle of the rising peripheral wall portion 21 is, for example, about 1.5 °.
The central wall portion 23 extends upward from the inner end portion of the movable wall portion 22 in the bottle radial direction. The central wall portion 23 is disposed coaxially with the bottle axis O, and is formed in a cylindrical shape whose diameter gradually increases from the upper side toward the lower side. A disc-shaped top wall 24 arranged coaxially with the bottle axis O is connected to the upper end portion of the central wall portion 23, and the central wall portion 23 and the top wall 24 form a top tube shape. Yes. The central wall portion 23 is formed in a circular shape in a cross sectional view. The central wall portion 23 extends downward from the outer peripheral edge portion of the top wall 24 and has an upper wall portion 23a formed in a curved shape protruding toward the inside in the bottle radial direction, and the bottle diameter of the movable wall portion 22. The lower wall portion 23c, which is gradually reduced in diameter from the inner end portion in the direction, is connected to the lower end portion of the upper wall portion 23a and the upper end portion of the lower wall portion 23c, and is recessed toward the outside in the bottle radial direction. And a bent portion 23b formed in a concave curved surface shape.

  The movable wall portion 22 is formed in an annular shape and is disposed coaxially with the bottle shaft O. Of the movable wall portion 22, the outer end portion in the bottle radial direction is connected to the upper end portion of the rising peripheral wall portion 21, and the inner end portion in the bottle radial direction is connected to the outer end portion in the bottle radial direction of the central wall portion 23. Has been. The outer end portion of the movable wall portion 22 in the bottle radial direction and the upper end portion of the rising peripheral wall portion 21 are connected to each other via a first curved surface portion 25 that is recessed outward in the bottle radial direction. The movable wall portion 22 is rotatable about a first curved surface portion (connection portion with the rising peripheral wall portion 21) 25 so as to move the central wall portion 23 in the vertical direction.

  The outer end portion of the movable wall portion 22 in the bottle radial direction is an inclined portion 26 that gradually extends upward from the upper end portion of the rising peripheral wall portion 21 toward the inner side in the bottle radial direction. The inclination angle θ <b> 1 with respect to the vertical direction of the inclined portion 26 is larger than the inclination angle of the rising peripheral wall portion 21 with respect to the vertical direction. In a longitudinal sectional view along the vertical direction, the length of the inclined portion 26 is the same as or slightly shorter than the length of the rising peripheral wall portion 21. However, the length of the inclined portion 26 may be equal to or longer than the length of the rising peripheral wall portion 21 in the longitudinal sectional view.

The movable wall portion 22 includes a curved portion 27 that is connected to the outer end portion in the bottle radial direction of the central wall portion 23 and has a curved surface shape protruding downward. The curved portion 27 is continuous with the inclined portion 26 from the inner side in the bottle radial direction of the inclined portion 26. For example, a flat portion or the like may be disposed between the curved portion 27 and the inclined portion 26.
The inclination angle θ2 with respect to the vertical direction of the outer end portion in the bottle radial direction of the curved portion 27 is the same as or slightly smaller than the inclination angle θ1 with respect to the vertical direction of the inclined portion 26. However, the present invention is not limited to this, and the inclination angle θ2 may be greater than or equal to the inclination angle θ1. When the outer end of the curved portion 27 in the bottle radial direction is a curved surface, the inclination angle θ2 is an inclination angle with respect to the vertical direction of a tangent circumscribing the curved surface in the longitudinal sectional view.
The inclination angle θ3 with respect to the vertical direction of the inner end of the curved portion 27 in the bottle radial direction is larger than the inclination angle θ1. However, the present invention is not limited thereto, and the inclination angle θ3 may be equal to or less than the inclination angle θ1 or may be equal to or less than the inclination angle θ2. When the inner end of the curved portion 27 in the bottle radial direction is a curved surface, the inclination angle θ3 is an inclination angle with respect to the vertical direction of a tangent circumscribing the curved surface in the longitudinal sectional view.
The curved portion 27 and the inclined portion 26 are connected to each other via a second curved surface portion 28 that is recessed upward.

In the longitudinal sectional view, the radius of curvature of the first curved surface portion 25 that connects the inclined portion 26 and the upper end portion of the rising peripheral wall portion 21 is the radius of curvature of the second curved surface portion 28 that connects the curved portion 27 and the inclined portion 26. It is getting bigger. However, the present invention is not limited thereto, and the curvature radius of the first curved surface portion 25 may be equal to or less than the curvature radius of the second curved surface portion 28 in the longitudinal sectional view.
Further, the length of the curved portion 27 is longer than the length of the inclined portion 26 in the longitudinal sectional view. In the illustrated example, the curved portion 27 is longer than the inclined portion 26 in the length along the bottle radial direction. In addition, the length of the curved portion 27 may be equal to or less than the length of the inclined portion 26 in the longitudinal sectional view, and the length of the curved portion 27 along the bottle radial direction is the length of the inclined portion 26. It is good also as below the length along a bottle radial direction.

In the present embodiment, the lowermost portion 27a located at the lowermost position of the curved portion 27 is disposed at a portion of the curved portion 27 that is located on the outer side in the bottle radial direction from the central position 27b in the bottle radial direction. In addition, the curved part 27 is gradually extended upward as it leaves | separates from the lowest part 27a in the bottle radial direction. In the empty state before the vacuum absorbing bottle 1 is filled with the contents, the lowermost portion 27a of the curved portion 27 is located at a portion of the curved portion 27 that is located on the outer side in the bottle radial direction from the central position 27b in the bottle radial direction. Has been placed.
The vertical positions of the lowermost portion 27a and the first curved surface portion 25 are equal to each other. In the longitudinal sectional view, the radius of curvature of the curved portion 27 where the lowermost portion 27 a is located is larger than the radius of curvature of the first curved surface portion 25. In the longitudinal sectional view, the radius of curvature of the curved portion 27 that is located on the inner side in the bottle radial direction from the lowermost portion 27a is larger than the radius of curvature of the portion that is located on the outer side in the bottle radial direction from the lowermost portion 27a. Yes.

  The lowermost portion 27a is disposed at a portion of the movable wall portion 22 that is located on the outer side in the bottle radial direction from the center position in the bottle radial direction. The lowermost portion 27a may be disposed at a central position in the bottle radial direction of the movable wall portion 22, or is disposed at a portion of the movable wall portion 22 that is located on the inner side in the bottle radial direction from the central position in the bottle radial direction. May be.

  The vacuum absorption bottle 1 configured as described above is filled with high-temperature contents (for example, about 40 ° C. to 95 ° C.). At this time, the bottom wall portion 19 is deformed and the movable wall portion 22 is directed downward. To displace. By sealing in this state, the bottom wall portion 19 is deformed and the movable wall portion 22 is displaced upward at the time of decompression in the decompression / absorption bottle 1 accompanying the subsequent cooling, and this decompression is absorbed.

  As described above, according to the reduced pressure absorption bottle 1 according to the present embodiment, the lowermost portion 27a of the curved portion 27 connected to the outer end portion of the central wall portion 23 in the bottle radial direction is more than the central position 27b in the bottle radial direction. Since it is arrange | positioned in the part located in the outer side of a bottle radial direction, the distance of the bottle radial direction of the lowermost part 27a and the outer end part of the bottle radial direction in the center wall part 23 will be ensured long. Accordingly, in combination with the increase in the radius of curvature of the inner peripheral portion of the curved portion 27 that is continuous with the central wall portion 23, the curved portion is displaced when displaced toward the lower side of the central wall portion 23 due to the filling of the contents. It is possible to prevent the lowermost portion 27a of the 27 from being deformed so as to be pointed downward, and at the time of negative pressure after sealing, the movable wall portion 22 can be uniformly rotated upward over the entire circumference. it can.

  The central wall portion 23 extends upward from the inner end portion of the movable wall portion 22 in the bottle radial direction, and the movable wall portion is displaced when the central wall portion 23 is displaced downward with the filling of the contents. Since the inner end portion in the bottle radial direction in 22 is easily deformed, the above-described effects are effectively achieved.

  The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

For example, the central wall portion 23 is not limited to the above-described embodiment, and may be appropriately changed such as extending straight along the vertical direction or forming a flat plate shape.
Further, for example, as shown in FIG. 3, the movable wall portion 122 does not have the inclined portion 26 and the second curved surface portion 28 but includes only the curved portion 27 and connects the movable wall portion 122 and the rising peripheral wall portion 121. The reduced-pressure absorption bottle 100 in which the first curved surface portion 125 that is recessed upward may be employed.
Further, a configuration without the top wall 24 may be adopted as the bottom wall portion 19.
The synthetic resin material forming the vacuum absorbing bottles 1 and 100 may be appropriately changed, for example, polyethylene terephthalate, polyethylene naphthalate, amorphous polyester, or a blend material thereof.
Furthermore, the reduced pressure absorption bottles 1 and 100 are 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 absorbing property.
Moreover, in the said embodiment, although the cross-sectional view shape orthogonal to each bottle axis | shaft O of the mouth part 11, the shoulder part 12, the trunk | drum 13, and the bottom part 14 was circular shape, it is not restricted to this, For example, it is square shape. It may be changed as appropriate.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the modification examples may be combined as appropriate.

DESCRIPTION OF SYMBOLS 1,100 Decompression absorption bottle 14 Bottom part 18 Grounding part 19 Bottom wall part 21, 121 Standing peripheral wall part 22, 122 Movable wall part 23 Central wall part 25, 125 1st curved surface part 27 Curved part 27a Bottom part 27b Bottle diameter of curved part Center position in direction 28 Second curved surface part

Claims (2)

A bottomed cylindrical vacuum absorbing bottle made of a synthetic resin material,
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 extending from the upper end of the rising peripheral wall toward the inside in the bottle radial direction;
A central wall portion connected to the inner end portion in the bottle radial direction of the movable wall portion, and
The movable wall portion includes a curved portion that is disposed to be rotatable in the vertical direction together with the central wall portion around a connection portion with the rising peripheral wall portion, and has a curved surface that protrudes downward.
The curved portion is connected to an outer end portion of the central wall portion in the bottle radial direction,
The vacuum absorption bottle according to claim 1, wherein a lowermost portion of the curved portion located at a lowermost position is disposed at a portion of the curved portion that is located on the outer side in the bottle radial direction from the central position in the bottle radial direction.   The reduced pressure absorption bottle according to claim 1, wherein the central wall portion extends upward from an inner end portion of the movable wall portion in the bottle radial direction.

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