JP6335734B2 - 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, a plurality of panel portions that are recessed toward the inside in the radial direction are formed in the cylindrical body portion at intervals in the circumferential direction. In addition, a configuration is known in which a portion between adjacent panel portions in the circumferential direction is a column portion.
In such a bottle, for example, when the temperature of the contents sealed in the bottle is lowered and the inside of the bottle is depressurized, the panel portion is preferentially deformed inward in the radial direction. Among them, the pressure reduction in the bottle is absorbed while suppressing the deformation in the portion other than the panel portion.

Further, for example, in Patent Document 1 below, in order to increase the rigidity in the radial direction of the pillar part, the both ends of the pillar part in the bottle axial direction are recessed toward the inner side in the radial direction and extend along the circumferential direction. The structure in which the groove part to be formed was disclosed.
According to this structure, it is thought that a deformation | transformation of a trunk | drum when an external force acts toward the inner side of radial direction with respect to a bottle (torso part), such as a line pressure, can be suppressed, for example.

Japanese Patent No. 5238212

  However, the conventional bottle described above still has room for improvement in terms of suppressing local deformation of the column portion.

  Then, this invention was made | formed in view of the situation mentioned above, The objective is to provide the bottle which can improve the rigidity of a pillar part and can suppress the local deformation | transformation of a pillar part. .

In order to solve the above problems, the present invention proposes the following means.
In the bottle according to the present invention, a plurality of panel portions that are recessed toward the inner side in the radial direction are formed in the cylindrical body portion at intervals in the circumferential direction, and between the panel portions adjacent to each other in the circumferential direction. Between the two ends of the column portion in the bottle axial direction, a groove portion that is recessed inward in the radial direction is formed, and the diameter of the groove portion is the diameter. surface facing the outer direction, toward the outer side from the center portion of the circumferential direction of the pillar portion, characterized in that it is formed by a gradual first inclined surfaces of a pair extending toward the inside in the radial direction.

With such a feature, when the inside of the bottle is depressurized, the panel part is preferentially deformed toward the inside in the radial direction, without accompanying deformation at other parts (for example, a column part or a shoulder part), It can absorb the internal pressure change (decompression) of the bottle.
In particular, according to the configuration of the present invention, the pair of first inclined surfaces that gradually extend inward in the radial direction from the central portion in the circumferential direction toward the outer side are formed in at least one end portion of the column portion. Thus, the radial rigidity in the column portion can be improved. In this case, when the external force acts on the bottle (column part) inward in the radial direction by the line pressure or the like, and the column part attempts to deform inward in the radial direction, the circumferential direction in the pair of first inclined surfaces The ridgeline part which connects inner side edge parts of this is trying to displace to the inner side of radial direction, and the compressive force of the circumferential direction is added to a 1st inclined surface. Thereby, in the 1st inclined surface, the reaction force (restoring force) toward the outer side of radial direction increases, and generation | occurrence | production of the crushing of a pillar part, a break, etc. can be suppressed. Therefore, local deformation of the column portion can be suppressed.

In addition, a plurality of panel portions that are recessed toward the inside in the radial direction are formed in the cylindrical body portion at intervals in the circumferential direction, and a space between the panel portions adjacent in the circumferential direction is a column portion. The bottle is a bottle, and at least one of the both ends of the column in the axial direction of the bottle, gradually toward the inside in the radial direction as it goes outward from the center in the circumferential direction of the column. A pair of first inclined surfaces extending is formed, and at the inner end edge in the bottle axial direction of the pair of first inclined surfaces, the column portion gradually extends toward the inner side in the bottle axial direction toward the outer side in the radial direction. Are formed separately from each other, and the second inclined surface has a circumferential length as it goes outward in the radial direction. It may be gradually reduced.

  According to this configuration, since the first inclined surface and the portion located on the inner side in the bottle axial direction from the first inclined surface are connected via the second inclined surface, the first inclined surface. While being able to disperse the stress applied to the surface, it becomes easy to remove the mold during bottle molding.

In addition, a plurality of panel portions that are recessed toward the inside in the radial direction are formed in the cylindrical body portion at intervals in the circumferential direction, and a space between the panel portions adjacent in the circumferential direction is a column portion. The bottle is a bottle, and at least one of the both ends of the column in the axial direction of the bottle, gradually toward the inside in the radial direction as it goes outward from the center in the circumferential direction of the column. A pair of first inclined surfaces extending is formed, and at the outer end edge in the bottle axial direction of the pair of first inclined surfaces, the column portion gradually extends toward the outer side in the bottle axial direction toward the outer side in the radial direction. Each of which has a third inclined surface connected to a portion located on the outer side in the bottle axial direction from the first inclined surface, and the third inclined surface has a length in the radial direction toward the outer side in the circumferential direction. It may be gradually enlarged.

  According to this configuration, since the first inclined surface and the portion located on the outer side in the bottle axial direction from the first inclined surface are connected via the third inclined surface, the first inclined surface. While being able to disperse the stress applied to the surface, it becomes easy to remove the mold during bottle molding.

  According to the bottle according to the present invention, it is possible to improve the rigidity of the column part and suppress local deformation of the column part.

It is a side view of the bottle in the embodiment of the present invention. It is sectional drawing which follows the II-II line | wire of FIG. It is sectional drawing which follows the III-III line of FIG. It is a partial side view of the bottle which shows the other structure of embodiment.

Hereinafter, bottles according to embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the bottle 1 of this embodiment includes a mouth portion 11, a shoulder portion 12, a body portion 13, and a bottom portion 14, and these 11 to 14 position their central axes on a common axis. In this state, the schematic configuration is arranged in this order.

  Hereinafter, the above-described common axis is referred to as the bottle axis O, 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 axis O is referred to as a radial direction, and a direction around the bottle axis O is referred to as a circumferential direction. In addition, the bottle 1 of this embodiment is formed by, for example, blow molding a preform formed integrally with a synthetic resin material and formed into a bottomed cylindrical shape by injection molding. Further, a cap (not shown) is attached to the mouth portion 11. Further, each of the mouth portion 11, the shoulder portion 12, the trunk portion 13, and the bottom portion 14 has a circular cross-sectional view shape along the radial direction.

The bottom part 14 is formed in a bottomed cylindrical shape, the heel part 17 whose upper end opening is connected to the lower end opening part of the body part 13, the lower end opening part of the heel part 17 is closed, and the outer peripheral edge part is a grounding part. 18 and a bottom wall portion 19.
The heel portion 17 is the maximum outer diameter portion of the bottle 1. The heel portion 17 is formed with a plurality of circumferential grooves 21 that are recessed inward in the radial direction and that extend continuously over the entire circumference in the bottle axis O direction.

  As shown in FIGS. 1 and 2, the body portion 13 is formed in a cylindrical shape, is continuous with the lower end of the shoulder portion 12, and extends downward. Both end portions of the body portion 13 in the bottle axis O direction constitute the first peripheral belt portion 22 and the second peripheral belt portion 23 that are the maximum outer diameter portion of the bottle 1 together with the heel portion 17 described above. In addition, each circumferential belt part 22 and 23 is made into the smooth surface extended over the perimeter of the circumferential direction. The body portion 13 is connected to the shoulder portion 12 via the first peripheral belt portion 22 and is connected to the heel portion 17 via the second peripheral belt portion 23.

  In the middle portion of the body portion 13 in the bottle axis O direction (portion located between each of the peripheral belt portions 22 and 23), a panel portion 31 for absorbing vacuum that is recessed toward the inside in the radial direction is spaced apart in the circumferential direction. A plurality (6 in the illustrated example) are formed. And in the trunk | drum 13, the part located between the panel parts 31 adjacent in the circumferential direction comprises the pillar part 32 extended along the bottle axis | shaft O direction. That is, the panel portion 31 and the column portion 32 are alternately arranged in the circumferential direction on the body portion 13. In addition, the panel part 31 is extended over the whole region of the bottle axis | shaft O direction in the intermediate part of the trunk | drum 13. As shown in FIG.

  The panel portion 31 includes a panel bottom wall portion 33 located radially inside the outer peripheral surface of the body portion 13, a side wall portion 34 extending from the outer periphery of the panel bottom wall portion 33 toward the radially outer side, It is defined by.

As shown in FIG. 2, the pair of vertical side wall portions 34 a that extend in the bottle axis O direction and are connected to both ends in the circumferential direction of the panel bottom wall portion 33 among the side wall portions 34 are circumferentially directed from the inner side toward the outer side in the radial direction. It is inclined toward the outside (the direction in which the vertical side wall portions 34a are separated).
On the other hand, of the side wall portions 34, a pair of lateral side wall portions 34b that are positioned at both ends in the bottle axis O direction and extend in the circumferential direction are inclined toward the outer side in the bottle axis O direction from the inner side to the outer side in the radial direction. ing. In addition, the boundary part of the vertical side wall part 34a and the horizontal side wall part 34b is made into the circular arc shape which protruded toward the outer side of the circumferential direction.

  And the column part 32 is formed so that the cross-sectional view shape orthogonal to the bottle axis | shaft O may become a rectangular shape (trapezoid shape). In the column part 32, the top part 32a located on the outer side in the radial direction has a curved shape protruding toward the outer side in the radial direction, and connects the vertical side wall parts 34a of the panel parts 31 adjacent in the circumferential direction. In addition, the width of the circumferential direction is gradually expanding toward the outer side of the bottle axis | shaft O direction at the both ends of the column part 32 in the bottle axis | shaft O direction.

  Here, as shown in FIGS. 1 and 3, a pair of inclined surfaces (first inclined surfaces) extending toward the inner side in the radial direction from the central portion in the circumferential direction toward the outer side at the upper end portion of the column portion 32. 41 is formed. Each inclined surface 41 is recessed inward in the radial direction with respect to an imaginary line L extending along the top portion 32 a of the column portion 32. Inner ends in the circumferential direction of the inclined surfaces 41 are connected via a ridge line portion 42. In the illustrated example, the ridge line portion 42 is flush with the top portion 32 a of the column portion 32. Note that the ridge line portion 42 may simply be a connecting portion between the inner end portions of the inclined surface 41, and has a band shape extending along the circumferential direction, and connects between the inner end portions of the inclined surface 41. Also good.

  Further, the outer peripheral end portions of the inclined surfaces 41 in the circumferential direction are connected to the outer peripheral edges (boundary portions of the vertical side wall portions 34a and the horizontal side wall portions 34b) of the panel portions 31 that are adjacent in the circumferential direction with the column portion 32 interposed therebetween. Has been. Therefore, as shown in FIG. 1, the outer edge in the circumferential direction of each inclined surface 41 has an arc shape that follows the boundary portion between the vertical side wall portion 34a and the horizontal side wall portion 34b in a side view as viewed from the radial direction. Yes. Further, the outer peripheral edge of each inclined surface 41 in the circumferential direction has the same radial position as the outer peripheral edge of the panel bottom wall portion 33, and is smoothly connected to the outer peripheral edge of the panel bottom wall portion 33.

  Moreover, between the upper end edge of each inclined surface 41 and the lower end edge of the 1st surrounding belt part 22 mentioned above, the upper connection wall part (3rd inclined surface) 51 which connects both is formed separately. ing. The upper connecting wall portion 51 is gradually inclined upward as it goes outward in the radial direction, and is formed over the entire circumferential direction of each inclined surface 41. In addition, each of the upper connecting wall portions 51 gradually increases in radial width toward the outer side in the circumferential direction. Therefore, the part located between each upper connection wall part 51 among the pillar parts 32 is made into the triangle shape which protruded below in the side view seen from radial direction, and the circumferential direction position of the top part is a ridgeline part. 42 is arranged at a position equivalent to 42.

  On the other hand, between the lower end edge of each inclined surface 41 and the part located below the inclined surface 41 of the column part 32, the lower side connection wall part (2nd inclined surface) which connects both is connected. 52 is formed. The lower connecting wall portion 52 is gradually inclined downward toward the outer side in the radial direction, and is formed over the entire circumferential direction of each inclined surface 41. In addition, each of the lower connection wall portions 52 gradually decreases in length in the circumferential direction toward the outer side in the radial direction. Therefore, the part located between each lower side connection wall part 52 among the pillar parts 32 is made into the shape of a triangle which protrudes upwards in the side view seen from radial direction, and the circumferential direction position of the top part is a ridgeline. It is arranged at the same position as the portion 42.

  Each inclined surface 41, together with each of the connecting wall portions 51 and 52 described above, defines a groove portion 55 in which the groove depth increases inward in the radial direction from the center portion in the circumferential direction toward the outside.

  In the bottle 1 configured as described above, when the inside of the bottle 1 is depressurized, the panel bottom wall portion 33 is located radially inward with the connection portion between the panel bottom wall portion 33 and the side wall portion 34 in the panel portion 31 as the center. It will be displaced toward. That is, by changing the panel bottom wall portion 33 of the panel portion 31 preferentially at the time of decompression, the internal pressure change of the bottle 1 (without the deformation at other portions (for example, the column portion 32 and the shoulder portion 12) ( Can be absorbed.

  In particular, in the present embodiment, by forming a pair of inclined surfaces 41 extending gradually inward in the radial direction from the central portion in the circumferential direction toward the outer side at the upper end portion of the pillar portion 32, The rigidity in the radial direction can be improved. In this case, when an external force acts on the bottle 1 (column 32) inward in the radial direction by a line pressure or the like, and the column 32 attempts to deform inward in the radial direction, the ridge line portion 42 is in the radial direction. As a result of the displacement to the inside, a circumferential compressive force is applied to the inclined surface 41. Thereby, in the inclined surface 41, the reaction force (restoring force) toward the outer side in the radial direction is increased, and the occurrence of collapse or breakage of the column portion 32 can be suppressed. Therefore, local deformation of the column part 32 can be suppressed.

  Moreover, since the inclined surface 41 and the part located in the both sides of the bottle axis | shaft O direction rather than the inclined surface 41 among the pillar parts 32 are connected via each connection wall part 51 and 52, the inclined surface 41 is connected. The applied stress can be dispersed and the mold can be easily removed during bottle molding.

  In addition, the inventor of this application implemented the verification test about the effect mentioned above. In this verification test, a tilting impact test in accordance with JIS Z 0205 (the measurement distance of the travel distance is set to 10 cm and the distance is extended until the bottle 1 is crushed), and the occurrence of crushing deformation of the bottle 1 It verified about. In this verification test, a configuration in which the above-described groove portion 55 is not formed is employed as a comparative example.

  In the verification test described above, it was obtained that the bottle of the comparative example was crushed and deformed at 40 cm, whereas the bottle 1 of the present embodiment was not crushed and deformed to 90 cm.

As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.
For example, the number and arrangement of the panel portions 31 (column portions 32) can be appropriately changed in consideration of the strength required for the bottle 1 and the reduced pressure absorption capacity.
In the above-described embodiment, the cross-sectional view shape along the radial direction of each of the shoulder portion 12, the trunk portion 13, and the bottom portion 14 is a circular shape. May be.

Furthermore, in the above-described embodiment, the case where the groove portion 55 is formed at the upper end portion of the column portion 32 has been described. However, the present invention is not limited to this, and the groove portion 55 may be formed at the lower end portion or at both upper and lower end portions. . That is, it is only necessary that the groove portion 55 is formed at at least one of the both end portions of the column portion 32.
Moreover, although embodiment mentioned above demonstrated the case where each connection wall part 51 and 52 was made into the inclined surface, it is not restricted to this.
Furthermore, you may make the position of the upper end edge of the inclined surface 41 and the upper end edge of the panel part 31 in the bottle axis | shaft O direction correspond.

  In the above-described embodiment, the configuration in which the radial direction positions of the outer peripheral edge of the inclined surface 41 and the outer peripheral edge of the panel bottom wall portion 33 are equal to each other has been described. Absent. For example, the outer peripheral edge of the inclined surface 41 and the outer peripheral edge of the panel bottom wall 33 are different from each other in the radial direction, and the two are connected via a stepped portion 60 as shown in FIG. It doesn't matter. Further, instead of the stepped portion 60, the outer peripheral edge of the inclined surface 41 and the radial position of the outer peripheral edge of the panel bottom wall portion 33 are interposed via a wall portion such as a ridge. Can be connected.

Moreover, although embodiment mentioned above demonstrated the case where the inclined surface 41 was made into linear form, it is not restricted to this. In other words, the inclined surface 41 may have a curved shape as long as it is configured to gradually extend inward in the radial direction from the central portion in the circumferential direction of the column portion 32 toward the outer side. In this case, it is more preferable that the inclined surface 41 has a protruding curve shape toward the outside in the radial direction.
Further, in the cross-sectional shape, the ridge line portion 42 may be linear or curved.
In the cross-sectional shape, the inclined surface 41 and the ridge line portion 42 may be formed by a plurality of straight lines or curves.
Furthermore, in the trunk | drum 13, the formation range in the bottle axis | shaft O direction of the panel part 31 and the surrounding belt parts 22 and 23 can change a design suitably.

The synthetic resin material forming the bottle 1 may be appropriately changed, for example, polyethylene terephthalate, polyethylene naphthalate, amorphous polyester, polyolefin, 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 absorbing property.

  In addition, in the range which does not deviate from the meaning of this invention, it is possible to replace suitably the component in the embodiment mentioned above by the well-known component, and you may combine the said modification suitably.

DESCRIPTION OF SYMBOLS 1 ... Bottle 13 ... trunk | drum 31 ... panel part 32 ... pillar part 41 ... inclined surface (1st inclined surface)
51. Upper connection wall (third inclined surface)
52. Lower connecting wall (second inclined surface)

Claims (3)

A plurality of panel portions that are recessed toward the inside in the radial direction are formed in the cylindrical body portion at intervals in the circumferential direction, and a column portion is formed between the panel portions adjacent to each other in the circumferential direction. A bottle,
Of the both ends of the column portion in the bottle axial direction, at least one end portion is formed with a groove portion recessed inward in the radial direction,
Of the grooves, the surface facing the outer side in the radial direction, toward the outer side from the center portion of the circumferential direction of the pillar portion, it is formed by a gradual first inclined surfaces of a pair extending toward the inside in the radial direction Characterized by the bottle. A plurality of panel portions that are recessed toward the inside in the radial direction are formed in the cylindrical body portion at intervals in the circumferential direction, and a column portion is formed between the panel portions adjacent to each other in the circumferential direction. A bottle,
A pair of first inclined surfaces that gradually extend inward in the radial direction toward the outer side from the central part in the circumferential direction of the column part at least one of the both end parts in the bottle axial direction of the column part. Formed,
The inner end edges in the bottle axis direction of the pair of first inclined surfaces extend gradually toward the inner side in the bottle axis direction toward the outer side in the radial direction, and the bottle axis is more than the first inclined surface in the column portion. A second inclined surface connected to a portion located inside the direction is formed separately,
Said second inclined surface, wherein the to Rubo torr that length in the circumferential direction is gradually reduced toward the outside in the radial direction. A plurality of panel portions that are recessed toward the inside in the radial direction are formed in the cylindrical body portion at intervals in the circumferential direction, and a column portion is formed between the panel portions adjacent to each other in the circumferential direction. A bottle,
A pair of first inclined surfaces that gradually extend inward in the radial direction toward the outer side from the central part in the circumferential direction of the column part at least one of the both end parts in the bottle axial direction of the column part. Formed,
The outer end edges in the bottle axis direction of the pair of first inclined surfaces extend gradually outward in the bottle axis direction toward the outer side in the radial direction, and the bottle axis is more than the first inclined surface in the column portion. A third inclined surface is formed separately from each other and located on the outside of the direction,
It said third inclined surface, to the feature that the length of the radial direction is gradually enlarged toward the outer circumferential Rubo Torr.

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