KR20080055878A - Plastic bottle - Google Patents

Abstract

A plastic bottle has a polygo nally-shaped bottle body, and the bottle body has a concave rib formed around its complete circumference. The rib has a rib central circumference, a rib upper circumference adjoining the upper edge of the rib central circumference, and a rib lower circumference adjoining the lower edge of the rib central circumference. The rib central circumference is formed in a shape that is non-homothetic with that of the rib upper circumference or the rib lower circumference.

Description

Plastic bottle {PLASTIC BOTTLE}

The present invention relates to a plastic bottle used to contain a liquid.

Plastic bottles for drinking water, typically PET bottles, are widely sold. Typically, the bottles are filled with beverages at relatively high temperatures (hot pack filling) or at room temperature (sterile filling). When the bottle is sealed and cooled after filling, the pressure inside the bottle drops. If the vacuum formed in the bottle unevenly deforms the wall of the bottle, the commercial value of the bottle is impaired.

There have been several proposals for plastic bottles with a vacuum panel in the bottle body to reduce bottle deformation due to vacuum.

For example, Japanese Patent Laid-Open No. 2005-178904 discloses a bottle having a bottle body having a rectangular cross section and vacuum panels formed in the bottle body to have a rectangular planar shape. Japanese Laid-Open Patent Publication No. 2002-330222 discloses a bottle having a bottle body having a circular cross section and a vacuum panel formed on the body to have an elliptical planar shape. The body of the two bottles is in the form of a body with no waist formed along the central axis as a whole. In addition, the bodies of the two bottles are formed with horizontal ribs along the periphery of the body and the horizontal ribs increase the strength (ie lateral stiffness) against any lateral load applied from the outside. Moreover, the bodies of the two bottles abut the cone shaped shoulders of the bottles.

The conventional bottles described above have no waist or nearly uniform diameter in the body, whether rectangular or round. However, considering user convenience in holding the bottle and drinking the beverage in the bottle, the bottle body should be easier to grip. Conventional bottles also have horizontal ribs on the bottle body, while lateral rigidity must be increased at the bottle shoulder. The shape of the horizontal ribs and the vacuum panels should also be improved further.

It is an object of the present invention to provide a plastic bottle that is easy to hold. A second object of the present invention is to produce plastic bottles that have sufficient rigidity for manufacture and distribution. It is a third object of the present invention to provide a plastic bottle with improved ability to accommodate all the vacuum formed in the bottle.

To achieve the first object of the present invention, the present invention provides a plastic bottle comprising an inlet portion capable of receiving a removable lid attached thereto as an inlet portion, a shoulder adjacent to the inlet portion, and a body portion adjacent to the shoulder. To provide. The body portion includes a waist portion having a distance from its central axis to its outer wall at a minimum in the body portion and having a specific cross-sectional shape; An upper body portion formed to enlarge and widen gradually or stepwise along a central axis upwardly from the waist portion; And a lower body portion formed to expand and widen gradually or stepwise along the central axis downward from the waist portion. The ratio of the distance L2 from the central axis to the maximum distance L1 from the central axis to the outer wall of the body part from a central axis to a given point on the outer wall of the waist part is set to be a value of 71% or more and 90% or less.

When the relationship between the distance L1 and the distance L2 is defined by its size, not the ratio between the distances, L1 may be set to 30 mm or more and 35 mm or less and L2 may be set to 25 mm or more and 27 mm or less. Can be.

Due to this configuration, the body portion includes an upper body portion and a lower body portion formed above and below the waist portion. Since the relationship between the distance L2 at the waist portion and the distance L1 at the body portion is set as described above, the body portion can be easily gripped at the waist portion. If the L2 / L1 ratio is 71% or less, the volume of the bottle decreases and a problem tends to occur during molding of the bottle. On the other hand, if the ratio is more than 90%, there is a tendency to reduce the effect of the waist portion to ease the grip of the bottle.

Preferably, the waist portion is located at a distance of 20 mm or less from the center of gravity of the plastic bottle.

Due to such a configuration, for example, the gripping is easy to increase the user convenience of the bottle.

Preferably the specific cross sectional shape of the waist portion is polygonal.

Due to such a configuration, since the position where the user actually grips to hold the bottle is formed in a polygonal shape, the user's hand is less likely to slide out of the bottle, for example when opening or closing the bottle cap, and thus the user of the bottle Convenience can be further increased.

Preferably, for manufacturing reasons, the polygon is a polygon with an even number of angles. The approximate hexagonal shape is particularly preferred.

More preferably, each corner of the approximate hexagon is at least chamfered or rounded.

By such a configuration, the user can comfortably hold the plastic bottle at the waist portion.

Preferably, concave ribs are formed in the waist portion of the polygonal shape. More preferably, the rib is formed along the entire periphery of the waist portion.

By such a configuration, the lateral rigidity of the waist portion can be improved. Ribs may also be formed discontinuously along the periphery herein.

Preferably the rib has a rib center periphery, a rib upper periphery adjacent to the top edge of the rib center periphery, and a rib bottom periphery adjacent to the bottom edge of the rib center periphery, the rib center periphery being similar to the rib top periphery or rib bottom periphery. Not formed.

With this configuration, the bottle's strength and lateral stiffness can be further improved by the ribs.

Preferably, the body portion as a whole has a shape that is approximately similar to a Japanese hand drum when viewed from the front.

Due to such a configuration, the waist portion is located almost in the vertical middle of the body portion.

Preferably all parts having a L1 value may be circular parts having a maximum diameter of the body part.

Due to such a configuration, the L1 value is the maximum body diameter.

Preferably, the portion having the L1 value may be formed at the top of the upper body portion and at the bottom of the lower body portion.

Due to such a configuration, the bottle can be stably placed because the bottle includes a part having the maximum body diameter in both the upper part and the lower part of the bottle. The bottles so configured can also be reliably transported on the production line and are also suitable for sale on vending machines.

Preferably the upper body portion and the lower body portion are formed in a polygonal shape.

With such a configuration, since the portions adjacent to the waist portion are formed in a polygonal shape, the bottle can be easily grasped from the waist portion.

Preferably the plastic bottle comprises a bottle bottom portion adjacent the bottom of the body portion. The outer wall of the bottle bottom portion is formed to be narrower until it is approximately the same size as the waist portion, progressively or stepwise downward along the central axis.

By such a configuration, the outer design of the bottle can be improved and it is also possible to increase the bottom wall thickness, thereby improving the barrier property of the bottle wall and the storage performance as a container.

In order to achieve the second object of the present invention, the present invention provides a plastic bottle having a body portion formed in a generally polygonal shape. The body portion has concave ribs formed along its entire periphery. The rib has a rib center periphery, a rib top periphery adjacent the top edge of the rib center periphery, and a rib bottom periphery adjacent the bottom edge of the rib center periphery. The rib center periphery is formed in a shape that is not similar to the shape of the rib top perimeter or the rib bottom perimeter.

Such a configuration can reduce the deformation of the rib upper periphery and the rib lower periphery in the same way as is possible at the rib center periphery, thereby further improving bottle strength and lateral stiffness.

Preferably, the shape of the rib upper periphery and the rib lower periphery is identical to each other.

Preferably, the shape of the rib center periphery is rounded at each corner and the shape of the rib top periphery or rib bottom periphery is chamfered at each corner.

With this configuration the ribs are characterized by rounded and / or chamfered corners.

Preferably, the bend point of the chamfered corner in the form of the rib upper periphery or the rib lower periphery is not located at the line connecting the point of the rounded corner in the form of the rib central periphery furthest from the central axis. .

Preferably the polygonal shape is approximately hexagonal.

With such a configuration, the bottle can increase user convenience, for example, because the user's hand tends to slip off the bottle.

Preferably the rib is formed in the vertical middle of the body portion.

With such a configuration, the transverse rigidity of the vertical middle of the body portion can be improved.

Preferably, the body portion is generally shaped like a Japanese hand drum when viewed from the front, and the width of the portion with ribs is minimal.

With this configuration, the lateral stiffness is improved in the part with the ribs and the body part can be easily gripped at this point.

Preferably the body portion has a concave ring formed along the entire periphery at each of the top and the bottom so that one ring is located above and below the rib.

With such a configuration, sufficient lateral rigidity can be obtained at the upper, lower, and middle portions of the body portion because the body portion has one ring at each of the upper and lower ends.

In order to achieve the second object of the present invention, the present invention also includes an inlet portion capable of receiving a removable lid attached thereto as an inlet portion; A shoulder adjacent the inlet portion; Provided is a plastic bottle comprising a body portion adjacent the shoulder. The shoulder is bumped along its entire periphery. The bump has a vertical periphery and a spherical-band-shape circumference adjacent the bottom of the vertical periphery and bending outward from the central axis.

With such a configuration, the shoulder has bumps formed along the entire periphery and thus the lateral stiffness is increased at the shoulder.

Preferably the portion between the vertical periphery and the sphere periphery is rounded.

In such a configuration, the vertical periphery is smoothly adjacent to the spherical periphery.

Preferably the lower end of the spherical periphery is adjacent to the portion having the largest bottle diameter.

Preferably the plastic bottle comprises a concave ring formed along the entire perimeter and defining the boundary between the shoulder and the body part. The portion with the largest bottle diameter is formed between the bump and the ring and contacts the bump and the ring.

With this configuration, the lateral stiffness is increased by the combination of the bump and the ring. In addition, even if one of the bumps or the ring is deformed, a certain level of lateral stiffness can be maintained by the other.

In order to achieve the third object of the invention, the invention provides another plastic bottle comprising a bottle wall with at least one circular part having a circular cross section. The bottle wall comprises at least one vacuum panel of polygonal shape having an odd number of angles, the vacuum panel being formed such that the first face is located proximate the circular part along the periphery of the circular part and at least pitted at the first face. do.

With such a configuration, all the vacuum formed in the bottle can be accommodated by a vacuum panel having a polygonal shape and having an odd number of angles, so that deformation of the bottle caused by all the vacuums can be reduced. In addition, since the vacuum panel is formed in a polygonal shape having an odd number of angles and dents in the first surface proximate the circular portion, the vacuum panel also increases the lateral stiffness.

Polygons having an odd number of angles herein are, for example, triangles, pentagons or heptagons.

Preferably the first face of the vacuum panel is located at a distance of at least 2 mm and at most 10 mm from the circular part.

Preferably, a plurality of vacuum panels are arranged at an even distance along the periphery of the bottle wall.

With this configuration, since the vacuum panels are evenly arranged, any vacuum formed in the bottle can be accommodated more appropriately.

Any number of vacuum panels can be formed herein and as an example the number of vacuum panels is four. The number of vacuum panels can also be determined according to the cross sectional shape of the bottle wall. For example, if the bottle wall is formed in a hexagonal shape, six vacuum panels can be formed.

Preferably, the circular portion is formed with concave ribs along its entire periphery.

Due to this configuration, the lateral stiffness is improved by the vacuum panel and the ribs. Furthermore, if one of the vacuum panels or ribs is deformed, a certain level of lateral stiffness can be maintained by the other.

Preferably the vacuum panel thickness is gradually changed from the first face towards the vertex furthest away from the first face, so that the vacuum panel thickness is thickest at the first face and decreases towards the vertex.

Due to such a configuration, the shape of the vacuum panel can be properly maintained even if deformation related to vacuum occurs in the bottle.

Preferably, the panel depth at the vertex furthest away from the first face is zero.

Preferably the number of odd-numbered angles is three.

By such a configuration, the vacuum panel is formed in a triangular form. In particular, by forming the vacuum panel in an isosceles triangle shape, the possibility of damage to the panel shape can be reduced even if a vacuum-related deformation occurs in the bottle.

Preferably the vertical line drawn from the vertex furthest away from the first face to the first face bisects the first face.

Preferably the two corners in contact with the first face are rounded up to R5.

By such a configuration, it is possible to appropriately reduce the deformation of the vacuum panel at the two corners.

Preferably the vacuum panel is formed above and below the circular part.

Preferably the circular parts are formed in at least two places and are spaced from each other along the central axis and the vacuum panels are formed in relation to each circular part.

This configuration allows any vacuum formed in the bottle to be more efficiently accommodated and further improves the lateral stiffness.

1 is a front view of a plastic bottle according to an embodiment of the present invention.

2 is a side view of the plastic bottle of FIG.

3 is a bottom plan view of the plastic bottle of FIG.

4 is a cross-sectional view taken along the line IV-IV of FIG. 2.

5A is a diagram for explaining the lateral stiffness of the waist portion of a plastic bottle being compared.

5B is a diagram for explaining the lateral stiffness of the waist of the plastic bottle of FIG. 1.

6 is a cross-sectional view taken along the line VI-VI of FIG. 2.

7 is an enlarged view of the shoulder of the plastic bottle of FIG.

8 is an enlarged view of the vacuum panel of the plastic bottle of FIG.

With reference to the accompanying drawings, a plastic bottle according to a preferred embodiment of the present invention will be described below. In the following description, the plastic bottle is briefly described about the parts of the plastic bottle once roughly divided, and then each part is explained in detail. An exemplary widely sold 500 ml plastic bottle will be described, for example, below.

As shown in Figs. 1 to 3, the plastic bottle 1 (hereinafter simply referred to as bottle 1) is made of thermoplastic resin such as polyethylene, polypropylene or polyethylene terephthalate. The bottle 1 is produced by various kinds of molding methods, such as blow molding, injection blow molding or stretch blow molding (biaxial stretch blow molding). The prepared empty bottle 1 is filled with a liquid that is the contents of the bottle after washing / sterilizing, chloride disinfection, etc., accompanied by disinfection with hot water.

Bottle 1 is for example filled with a beverage, examples of which include various non-carbonated beverages such as various Japanese teas (Green Tea), oolong tea, tea, coffee and fruit juices. The bottle 1 can be dispensed via a known sterile filling system such as, for example, hot-pack filling (relative high temperature of 80 ° C.) or aseptic filling (eg room temperature of 15-35 ° C.). Carbonated drinks are filled. A removable lid (not shown in the figure) is attached to the bottle 1 to close the dispensing opening.

In addition to the drink, the bottle 1 may of course contain food such as Worcester sauce or Japanese cooking rice wine, or may contain a carbonated beverage. The bottle 1 according to this embodiment is most suitable for containing non-acidic beverages. The bottle 1 is not only easy to hold, but also includes various characteristic structures for improving the lateral stiffness and the like to accommodate all the vacuum formed therein. In this specification, lateral stiffness generally means the strength against the load applied from the outside in the lateral direction (radial direction) of the bottle 1.

The bottle 1 is manufactured by integrally forming the inlet 2, the shoulder 3, the body 4 and the bottom 5 so that each part is adjacently side by side along the central axis (vertical axis, Y-Y) from above. These parts constitute the wall 6 of the bottle allowing the beverage to be stored in the bottle 1. The panel section of the body part 4 is formed as a part between the pair of concave rings 7, 8. The upper ring 7 forms the boundary between the body 4 and the shoulder 3, and the lower ring 8 forms the boundary between the body 4 and the bottom 5. Three types of triangular vacuum panels 10, 11, 12 are also formed in the bottom wall 6.

The inlet 2 is formed at the upper end of the bottle 1 and constitutes a part having the smallest diameter in the bottle 1. The inlet 2 is open at the upper end and functions as an opening for supplying or dispensing a beverage inward. The inlet 2 has a vent slot (screw part) 21 formed to receive a removable lid attached to the inlet and a flange portion 22 formed below the vent slot 21. When the user twists the lid around the central axis (Y-Y), the lid moves between the open and closed positions.

The bottom 5 is formed at the bottom of the bottle 1. The bottom 5 is formed to have a circular cross section as a whole, and the outer wall is formed to narrow down along the central axis Y-Y gradually or stepwise. That is, the outer wall is formed such that the outer diameter of the circular cross section is gradually reduced in the downward direction. In addition, six triangular vacuum panels 12 are evenly spaced along the periphery of the outer wall. The base surface of the bottom 5 is recessed upward to provide strength to the bottle 1.

The body 4 as a whole has a shape similar to a Japanese hand drum when viewed from the front (see especially FIG. 1). The vertical middle part of the body 4 is relatively narrow in comparison to the other parts. The body 4 has a waist 31 formed in the vertical middle portion, an upper body 32 formed to extend and widen along the central axis YY upwardly from the waist 31, and a center downward from the waist 31. It consists of a lower body 33 formed to be enlarged and widened along the axis YY. By such a configuration, the outer wall of the body 4 is easy to grip.

To make the gripping of the bottle even easier, the distance from the center of gravity G of the bottle 1 to the waist 31 along the central axis Y-Y is 20 mm or less. From the characteristic shape of the bottle the waist 31 may also be called a narrow or throttle portion.

The upper body 32 and the lower body 33 are gradually narrowed in shape toward the waist 31, that is, the distance from the central axis YY to the outer wall is gradually changed according to the distance from the waist part 31. It is formed to increase. The upper body 32 may be formed to be enlarged and widened in steps upwards, and the lower body 33 may be formed to be enlarged and widened in steps downwards.

The body 4 is formed to have a polygonal cross-sectional shape as a whole. Preferably, the waist 31, the upper body 32, and the lower body 33 is formed to have a polygonal cross-sectional shape having an even number of angles, more preferably the cross-sectional shape is approximately as shown in this embodiment Hexagonal shape. The reason for the above "approximate" is that the cross section of the body 4 is basically a regular hexagon but more particularly each corner is chamfered or rounded to be close to an equilateral dodecagon.

Waist 31 has a concave lib 35 formed along the entire perimeter of waist 31. The specific portion of this rib 35 is configured such that the distance from the central axis Y-Y to the outer wall of the waist 31 is minimal. Since the rib 35 is formed on the waist 31, the lateral rigidity of the waist 31 is improved as compared with the case where there is no rib. In addition, the ribs 35 further improve the lateral stiffness by the characteristic shapes described below. This is described below with reference to FIGS. 1, 4 and 5.

4 is a cross sectional view taken along the line IV-IV of FIG. 2, which is shown with reference to the cross section of the rib 35 so that the lower body 33 and other parts are not shown in FIG. 4. The outer wall of the rib 35 is formed to be recessed and the inner wall of the rib 35 is formed to protrude into the inner hollow of the bottle 1. The outer wall of the rib 35 consists of a rib central circumference 41, a rib upper circumference 42, and a rib lower circumference 43.

One end of the rib upper perimeter 42 is adjacent to the upper edge of the rib center periphery 41, and the other end of the rib upper perimeter is adjacent to the bottom of the upper body 32. The rib upper perimeter 42 is inclined with respect to the cross section of the bottle upwards and outwards.

One end of the lower rib peripheral portion 43 is adjacent to the lower edge of the rib center peripheral portion 41, and the other end of the rib lower peripheral portion is adjacent to the upper end of the lower body 33. The rib bottom perimeter 42 is inclined downwardly outward relative to the cross section of the bottle. The rib upper peripheral portion 42 and the rib lower peripheral portion 43 are formed in exactly the same shape. Naturally, these two parts may be formed in different shapes.

The rib center peripheral portion 41 is formed in a form similar to the shape of the rib upper peripheral portion 42 or the rib lower peripheral portion 43. As mentioned above, the outer shape of the rib center peripheral portion 41 is basically a regular hexagon, and each corner is rounded to R5, for example. On the other hand, the shape of the rib upper peripheral portion 42 and the rib lower peripheral portion 43 is basically a regular hexagon and each corner is chamfered.

As shown in FIG. 5A, the rib center periphery 41 'and the rib top periphery 42' (or rib bottom periphery 43 ') of the compared bottles are basically formed in the shape of a regular hexagon with each corner being chamfered. And their forms are similar to each other. As a result, at each corner, the flexion point 45 'of the rib center periphery 41' and the flexion point 47 'of the rib upper periphery 42' (or rib bottom periphery 43 ') The straight line (m) connecting 교차 intersects the central axis (YY). That is, in the rib 35 'shown in FIG. 5A, the rib center peripheral portion 41' is formed to be in an offset position with respect to the rib upper peripheral portion 42 '(or rib lower peripheral portion 43').

As shown in FIG. 5B, the shape of the rib center peripheral portion 41 was rounded at its six corners. Thus, at each corner, the two bend points 47 of the rib upper perimeter 42 (or rib lower perimeter 43) are not located on a straight line m connecting the central axis YY, and the rib central periphery ( The point 45 on the rounded corner of 41 is farthest from the central axis YY.

That is, the straight line m connecting the central axis Y-Y and the point 45 intersects the rib upper periphery 42 (or rib lower periphery 43) between the two bend points 47. Thus, in the rib 35 of the present embodiment, the rib center peripheral portion 41 is not formed to be in an offset position with respect to the rib upper peripheral portion 42 (or the rib lower peripheral portion 43) and is provided by the rib 35. Strength and lateral stiffness are further improved.

Referring again to FIGS. 1 and 2, each of the upper body 32 and the lower body 33 has six panels of approximately trapezoidal shape or approximately flask shape when viewed from the front, and the same shape, but the upper and lower sides are reversed. The six panels are formed to have panel sections formed alternately arranged and connected along the outer circumferential direction of the body. Each of the upper body 32 and the lower body 33 is provided with a triangular vacuum panel 10, 11 in every second panel (another panel) in the panel formed as described above.

The circular part 50 with the ring 7 is formed at the top of the upper body 32, ie above the panel section. The ring 7 is formed in a concave shape with a trapezoidal vertical cross section inverted along its entire periphery, the inner wall of which is formed to protrude into the hollow of the bottle 1. The ring 7 is formed in the vertical middle portion of the circular portion 50, and the annular portion above and below the ring 7 of the circular portion 50 has a maximum diameter portion 51 having the maximum outer diameter of the bottle 1. Form.

The circular part 60 with the ring 8 is formed at the bottom of the lower body 33, ie below the panel section. The ring 8 is formed in a concave shape with a trapezoidal vertical cross section inverted along its entire periphery, the inner wall of which is formed to protrude into the hollow of the bottle 1. The ring 8 is formed in the vertical middle portion of the circular portion 60, and the annular portion above and below the ring 8 of the circular portion 60 has a maximum diameter portion 61 having the maximum outer diameter of the bottle 1. Form.

The maximum diameter portions 51, 61 have the same diameter. When the bottle 1 is put down, the bottle is stably supported by the maximum diameter portions 51 and 61. The two rings 7, 8 can also be called ring ribs and increase the strength and lateral stiffness of the bottle 1, like the ribs 35 of the waist 31. Instead of forming the two rings 7, 8 as described above in an annular shape, the two rings may be formed in a modified form such as the ribs 35 of the waist 31. Such modifications will be described below with reference to FIG. 6.

As shown in FIG. 6, the outline of the ring 8 is approximately regular hexagonal. The term "approximately" in this specification is that each side of the regular hexagon 4 is formed in an arc shape and each corner is rounded to R4, for example. On the other hand, the outer diameter of the largest diameter part 61 is circular.

Since the outer shape of the ring 8 is similar to the outer shape of the largest diameter portion 61, the strength and the lateral rigidity of this region are further improved. It goes without saying that the upper ring 7 and the circular part 50 can also be formed in this way. In another modified form, the rings 7, 8 are formed to have a circular shape and the maximum diameters 51, 61 are formed to have a roughly polygonal shape.

Next, an example related to the size of the body 4 will be briefly described. In the body 4, the distance L1 between the central axis Y-Y and the bottle outer wall in the upper maximum diameter portion 51 and the lower maximum diameter portion 61 is maximum (see FIGS. 2 and 6). On the other hand, the distance L2 from the central axis Y-Y to a given point on the bottle outer wall of the waist 31 is set as shown in FIG. That is, the distance L2 is an approximate hexagon which is a boundary between the lower rib peripheral portion 43 and the lower body 33 (or the boundary between the rib upper peripheral portion 42 and the upper body 32) from the central axis YY. The distance to a specific side of the appearance.

For example, the distance L1 is a value of 30 mm or more and 35 mm or less, preferably 33.5 mm. The distance L2 is a value of 25 mm or more and 27 mm or less, preferably 25.805 mm. The L2 / L1 ratio calculated based on the above-mentioned content is 71% or more and 90% or less, Preferably it is 77%.

By setting the relationship between the maximum distance L1 and the distance L2 as described above, the body 4 is easily gripped by the waist 31. If the L2 / L1 ratio is 71% or less, the volume of the bottle is relatively small, and if the L2 / L1 ratio is 90% or more, it tends to be difficult to grip at the waist 31.

Next, the shoulder 3 will be described in detail with reference to FIGS. 2 and 7. The shoulder 3 is formed to have a dome 71 adjacent to the bottom of the inlet 2 and a bump 72 adjacent to the bottom of the dome 72. The dome 71 is formed in a shape such as a dome or in a rough truncated conical shape and enlarged and widened downward along the central axis Y-Y.

The bump 72 is formed to have a vertical periphery 81 adjacent to the bottom of the dome 71 and a spherical-band-shape periphery 82 adjacent to the bottom of the vertical periphery 81. . Both peripheries 81 and 82 are formed along the entire periphery of the shoulder 3.

The ball target periphery 82 is bent in a radially outward direction with respect to the vertical periphery 81, and the lower end of the ball target periphery 82 is adjacent to the top of the maximum diameter portion 51. The upper maximum diameter 51 is substantially adjacent to both the bump 72 and the ring 7 and has a height of, for example, 10 mm or less, preferably 3 mm. The portion between the vertical periphery 81 and the bottom of the dome 71 is rounded to R3, for example. The portion between the vertical periphery 81 and the sphere periphery 82 is rounded to R1.5, for example.

By forming the bumps 72 on the shoulder 3 as described above, the same effect as provided by the ring ribs can be achieved, resulting in an improvement in the lateral rigidity of the shoulder 3. The lateral stiffness can also be further improved by forming bumps 72 and rings 7 together with the upper portion of the bottle 1. Even if one of the bump 72 and the ring 7 is deformed, a certain level of lateral stiffness can be maintained by the other.

Next, the vacuum panels 10, 11, 12 will be described in detail with reference to FIGS. 1 and 8. As mentioned above, the bottle wall 6 has triangular vacuum panels 10, 11, 12, each six vacuum panels being evenly spaced along the periphery. It is possible to accommodate all the vacuum formed in the bottle 1 after filling the bottle by the vacuum panels 10, 11, 12, thus reducing the deformation of the bottle 1. The triangular shape also allows the vacuum panels 10, 11, 12 to increase lateral stiffness as do ring ribs.

The first vacuum panel 10, the second vacuum panel 11, and the third vacuum panel 12 are formed in the upper body 32, the lower body 33, and the bottom 5, respectively. The second vacuum panels 11 are larger than the first vacuum panel 10 and the third vacuum panel 12. The number of each of the vacuum panels 10, 11, 12 may be six or one in this embodiment. However, the number of each vacuum panel 10, 11, 12 is preferably one or more.

The vacuum panels 10, 11, 12 are all formed in a triangle when viewed from the front. The panels 10, 11, and 12 may be formed to show a triangular shape of any shape, including an equilateral triangle shape or an isosceles triangle shape as in the present embodiment when viewed from the front. By being formed in an isosceles triangle shape, the vacuum panels 10, 11, 12 can maintain their shape even if a strain related to vacuum occurs in the bottle 1.

Each of the vacuum panels 10, 11, 12 has one side 100, 111, 121 located near the circular portion 50 or 60 along the periphery. Each of the surfaces 101, 111, 121 is located at a distance of, for example, 2 mm or more and 10 mm or less along the direction of the central axis Y-Y from the closest maximum diameter portion 51 or 61.

More specifically, the surface of each first vacuum panel 10 is located directly below the lower maximum diameter portion 51 of the upper circular portion 50. The face of each second vacuum panel 11 is located directly above the upper maximum diameter portion 61 of the lower circular part 60. The surface of each third vacuum panel 12 is located just below the lower maximum diameter portion 61 of the lower circular portion 60.

The vacuum panels 10, 11, 12 are arranged vertically such that the vertices 102, 112, 122 that are farthest from each face 101, 111, 121 are on the same vertical line. Since the vacuum panels 10, 11, 12 are formed in almost the same manner, the first vacuum panel 10 will be described in more detail below.

As shown in FIG. 8, each vacuum panel 10 is formed by digging a portion of the bottle wall 6 and is not uniform in depth. Specifically, the depth of each vacuum panel 10 is gradually changed toward the vertex 102 that is farthest away from the face 101 from the face 101. Thus the panel depth is maximum at face 101 and decreases toward vertex 102 and becomes zero at vertex 102. That is, vertex 102 is on the same plane as the other outer surface of bottle wall 6. Due to this structure, the panel 10 can have the ability to accommodate any vacuum formed in the bottle 1. A modified form in which the vacuum panel 10 is recessed as a whole is also possible.

In the vacuum panel 10, the two corners 104, 105 in contact with the face 101 are preferably rounded to R5 or below. This configuration can reduce the deformation of the vacuum panel 10 at the two corners 104, 105.

Three sides 106, 107, 108 defining the depth of the vacuum panel 10 are inclined to the inside of the triangular panel surface (bottom) 109. Due to this structure, the molding of the vacuum panel 10 may be easier, and when chemical cleaning is performed after the bottle 1 is manufactured, the accumulation of liquid chemicals on the panel 10 may be reduced.

The vacuum panels 10, 11, 12 have been described as having an isosceles triangular shape from above, which may be in the form of teardrops or droplets. In addition, the shape of the vacuum panels 10, 11, 12 is not limited to an isosceles triangle, and any polygon having an odd number of angles, for example, a pentagon or a heptagon, may be used. All that is needed for the vacuum panels 10, 11, 12 is that the panels have one side at the periphery and the vertical line drawn from the face along the periphery to the vertex furthest from that side is bisected at that side.

As described above, the bottle 1 according to the present embodiment has a waist 31 on the body 4 and the distance L2 at the waist 31 has a specific relationship with the associated maximum distance L1. The definition makes it easier to grip the bottle (1). In addition, the waist 31 is formed to have a cross-section of the polygon, for example, it is easy to grip the bottle when the user opens / closes the bottle cap can improve the ease of use.

The waist 31 also has a rib 35 which is formed to have a cross section of a characteristic shape, thus improving the lateral stiffness of this part. In addition to the bumps 72 formed in the shoulder 3, the two rings 7, 8 also improve the lateral stiffness of the bottle 1, and the vacuum panels 10, 11, 12 also provide Lateral rigidity can be improved. In addition, the vacuum panels 10, 11, 12 have the above-described characteristic shape, which improves the ability to accommodate all the vacuum formed in the bottle 1 and can reduce the strain caused by the vacuum in the bottle 1. . Moreover, the above-described structure of the bottle wall 6 can enhance the aesthetic enjoyment of the design of the bottle 1 and also allow the bottle to have a shape suitable for handling in a manufacturing line or a vending machine.

Claims (37)

An inlet portion, a shoulder adjacent to the inlet portion, and a body portion adjacent to the shoulder, The body portion, A waist portion having a distance from the central axis to the outer wall with a minimum in the body portion and having a specific cross-sectional shape, An upper body portion formed to enlarge and widen gradually or stepwise along the central axis upwardly from the waist portion, A lower body portion formed to enlarge and widen gradually or stepwise along the central axis downward from the waist portion, When L1 is the maximum distance from the central axis to the outer wall of the body part and L2 is the distance from the central axis to the given point of the outer wall of the waist part, the L2 / L1 ratio is set to a value of 71% or more and 90% or less. Plastic bottle, characterized in that. An inlet portion, a shoulder adjacent to the inlet portion, and a body portion adjacent to the shoulder, The body portion, A waist portion having a distance from the central axis to the outer wall with a minimum in the body portion and having a specific cross-sectional shape, An upper body portion formed to enlarge and widen gradually or stepwise along the central axis upwardly from the waist portion, A lower body portion formed to enlarge and widen gradually or stepwise along the central axis downward from the waist portion, The maximum distance L1 from the central axis to the outer wall of the body part is set to a value between 30 mm and 35 mm, and L2, the distance from the central axis to a given point on the outer wall of the waist part, is between 25 mm and 27 mm. Plastic bottle, characterized in that. The method according to claim 1 or 2, The waist part is a plastic bottle, characterized in that located at a distance of 20 mm or less from the center of gravity of the plastic bottle. The method according to any one of claims 1 to 3, A plastic bottle, characterized in that the specific cross-sectional shape of the waist is polygonal. The method of claim 4, wherein A plastic bottle, characterized in that the polygon is an approximate hexagon. The method of claim 5, Wherein each corner of the approximate hexagon is at least chamfered or rounded. The method according to any one of claims 4 to 6, A plastic bottle, characterized in that a recessed rib is formed at the waist. The method of claim 7, wherein A rib is formed along the entire periphery of the waist portion. The method of claim 8, The rib includes a rib central circumference, a rib upper circumference adjacent to the upper edge of the rib center periphery, and a rib lower circumference adjacent to the lower edge of the rib center peripheral periphery. , A plastic bottle, characterized in that the rib center peripheral portion is formed in a shape similar to the shape of the rib upper peripheral portion or the rib lower peripheral portion. The method according to any one of claims 1 to 9, A plastic bottle, characterized in that the body part has an approximate shape as a Japanese hand drum when viewed from the front as a whole. The method according to any one of claims 1 to 10, A plastic bottle, characterized in that all parts having an L1 value are circular parts having a maximum diameter of the body part. The method according to any one of claims 1 to 11, A portion having an L1 value is formed at the top of the upper body portion and at the bottom of the lower body portion. The method according to any one of claims 1 to 12, And the upper body portion and the lower body portion are formed in a generally polygonal shape. The method according to any one of claims 1 to 13, An additional bottom portion of the bottle adjacent to the bottom of the body portion, A plastic bottle, characterized in that the outer wall of the bottom portion of the bottle narrows down to approximately the same size as the waist portion along the central axis in a gradual or stepwise manner. A body portion having a concave rib formed generally in a polygonal shape and formed along the entire periphery, The rib includes a rib including a rib center periphery, a rib upper periphery adjacent to the upper edge of the rib center periphery, and a rib lower periphery adjacent to the bottom edge of the rib central periphery, Wherein the rib center periphery is formed in a shape similar to the shape of the rib upper periphery or rib bottom periphery. The method of claim 15, A plastic bottle, wherein the rib top periphery and the rib bottom periphery have the same shape. The method according to claim 15 or 16, Each corner in the form of the center periphery of the rib is rounded, Wherein each corner in the form of a rib upper periphery or rib bottom periphery is chamfered. The method of claim 17, The flexion point of the chamfered corner in the form of the rib upper periphery or the rib lower periphery is not located on a straight line connecting the point of the rounded corner in the form of the center periphery of the rib that is furthest from the central axis. Characterized in that the plastic bottle. The method according to any one of claims 15 to 18, A plastic bottle, characterized in that the polygonal shape is an approximate hexagon. The method according to any one of claims 15 to 19, A rib is formed in the vertical center of the body portion, the plastic bottle. The method according to any one of claims 15 to 20, The plastic body is characterized in that the body part has a shape roughly the same as a Japanese hand drum when viewed from the front and the rib part has a minimum width. The method according to any one of claims 15 to 21, A plastic bottle, characterized in that a concave ring is formed along the entire periphery at each of the upper and lower ends so that one ring is positioned below and above the rib. An inlet portion, a shoulder adjacent to the inlet portion, and a body portion adjacent to the shoulder, A shoulder comprising a bump formed along the entire periphery, The bump, With the vertical perimeter, And a spherical-band shape periphery adjacent the bottom of the vertical periphery and bent outward from the central axis. The method of claim 23, wherein The portion between the vertical periphery and the spherical periphery is rounded. The method of claim 24, A lower end of the spherical periphery is a plastic bottle, characterized in that adjacent to the portion having the maximum bottle diameter. The method of claim 25, Further comprising a concave ring formed along the entire periphery and defining a boundary between the shoulder and body parts, And a portion having a maximum bottle diameter formed between the bump and the ring and in contact with the bump and the ring. A bottle wall having at least one circular portion having a circular cross section, The bottle wall has at least one vacuum panel in the form of a polygon with an odd number of angles, The vacuum panel is formed such that the first side is located proximate the circular portion along the periphery, And the vacuum panel is recessed at least on the first side. The method of claim 27, And the first face of the vacuum panel is located at a distance of at least 2 mm and at most 10 mm from the circular portion. The method of claim 27 or 28, Wherein the plurality of vacuum panels are evenly disposed on the bottle wall along the periphery. The method according to any one of claims 27 to 29, Wherein the circular portion has a concave rib formed along the entire periphery. The method according to any one of claims 27 to 30, And the vacuum panel depth is gradually changed from the first face toward the vertex furthest away from the first face such that the panel depth is at the maximum at the first face and decreases toward the vertex. The method of claim 31, wherein And wherein the panel depth at the vertex at the maximum distance from the first face is zero. 33. The method according to any one of claims 27 to 32, A plastic bottle, characterized in that the number of odd angles is three. The method according to any one of claims 27 to 33, And the vertical line drawn from the vertex furthest away from the first face to the first face bisects the first face. The method according to any one of claims 27 to 34, The two corners in contact with the first side are rounded to R5 or less. The method according to any one of claims 27 to 35, A plastic bottle, wherein the vacuum panels are formed above and below the circular part. The method according to any one of claims 27 to 36, Circular parts are formed in at least two places and are spaced apart from each other along the central axis, And a vacuum panel is formed for each circular portion.

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