WO2015076362A1 - プラスチックボトル - Google Patents
プラスチックボトル Download PDFInfo
- Publication number
- WO2015076362A1 WO2015076362A1 PCT/JP2014/080870 JP2014080870W WO2015076362A1 WO 2015076362 A1 WO2015076362 A1 WO 2015076362A1 JP 2014080870 W JP2014080870 W JP 2014080870W WO 2015076362 A1 WO2015076362 A1 WO 2015076362A1
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- WO
- WIPO (PCT)
- Prior art keywords
- bottle
- rib
- circumferential rib
- shoulder
- circumferential
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D79/00—Kinds or details of packages, not otherwise provided for
- B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
- B65D79/008—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars
- B65D79/0084—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars in the sidewall or shoulder part thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D23/00—Details of bottles or jars not otherwise provided for
- B65D23/10—Handles
- B65D23/102—Gripping means formed in the walls, e.g. roughening, cavities, projections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
- B65D1/0292—Foldable bottles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2501/00—Containers having bodies formed in one piece
- B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
- B65D2501/0018—Ribs
- B65D2501/0036—Hollow circonferential ribs
Definitions
- the present invention relates to a plastic bottle.
- Plastic bottles (hereinafter also simply referred to as “bottles”) are widely used as beverage bottles, and their weight reduction is required.
- As a method for reducing the weight of the bottle it is common to reduce the wall thickness.
- the reduction in thickness causes a decrease in the strength of the bottle at the same time. For this reason, when designing a bottle, it is required to balance the conflicting elements of weight reduction and strength maintenance.
- bottles filled with contents are required to be able to withstand a large top load (longitudinal compression load).
- a large top load longitudinal compression load
- the bottles are transported and stored, they are stored in a cardboard box in units of several to several tens of bottles filled with the contents, or put together on a pallet by being packed together with a shrink pack or binding band.
- Each bottle in the lower tier must be able to withstand a large top load.
- the inventor of the present application tried to solve the above-mentioned problem by a completely different approach.
- it was considered to resist the top load by crushing a predetermined amount of the bottle filled with the contents in the vertical direction in advance.
- a relatively small top load is applied to the bottle, and the shoulder of the bottle is deformed so as to sink into the bottle body. Then, the bottle is stored in a cardboard box in the depressed state and is to be transported and stored.
- the bottles stored in the cardboard box in this way are taken out from the cardboard box at the retail store etc. of the transport destination, and then the bottle shoulder that has been depressed until then is pulled out from the inside of the bottle body, so that it becomes a normal bottle shape Can be restored.
- deforming (falling) the bottle in advance during transportation and storage it can withstand the top load when the cardboard boxes are stacked, and after restoration, it is restored to the normal bottle shape, It can be placed in the store as usual and used for drinking.
- the present inventor has found a new problem here. That is, when a top load was applied to the bottle prior to storage in the cardboard box, a large depression occurred locally at the shoulder of the bottle, and a phenomenon that a uniform depression did not occur throughout the bottle shoulder was observed. . As a result, the bottle mouth part above the bottle shoulder part tilts and can not withstand the top load when stacking cardboard boxes, or stress concentrates on a part of the bottle shoulder part, leading to damage, etc. There was a problem that the commercial value was greatly impaired.
- the present invention has been made in view of the above background, and the purpose of the present invention is to allow the bottle to sink and restore without damaging the bottle shoulder even when the plastic bottle is thinned, and is effective for top loading. It is to provide a plastic bottle that can meet the requirements.
- the plastic bottle of the present invention is a bottle that expands downward so as to connect the bottle mouth portion that serves as a spout for contents, the bottle body portion, and the bottle mouth portion and the bottle body portion.
- a plastic bottle having a shoulder portion, wherein the bottle shoulder portion has a first circumferential rib, a second circumferential rib, and a third circumferential rib that are annular in order from the upper side, coaxially with the bottle mouth portion.
- a compressive load is applied to the bottle shoulder, and the first circumferential rib, the second circumferential rib, and the third circumferential rib.
- the bottle shoulder can be deformed from the starting point to shift to the depressed state.
- the bottle shoulder portion is deformed so as to be uniformly depressed around the bottle mouth portion. To do. Therefore, the bottle shoulder can be buckled by a compressive load without inclining the bottle mouth, and the bottle shoulder can be shifted to a depressed state. Since it is distributed over the rib, the second peripheral rib, and the third peripheral rib, it is possible to suppress local stress concentration and damage caused thereby.
- At least one of the first circumferential rib, the second circumferential rib, and the third circumferential rib has an annular shape with a plurality of linear ridge lines.
- the bottle shoulder when the top load is applied prior to storage in the cardboard box can be deformed so as to be folded back along the straight ridgeline. Therefore, as compared with the case where the ridge line is curved, the bottle mouth portion can be more reliably prevented from being inclined, and for example, it is possible to shift to a depressed state that can withstand a top load when the cardboard boxes are stacked.
- the bottle shoulder has first diameter ribs extending radially from the bottle mouth side toward the bottle body side between the first circumferential rib and the second circumferential rib, It is good to have the 2nd diameter rib extended radially toward the said bottle trunk
- the bottle shoulder is deformed so as to be folded back along the first diameter rib and the second diameter rib, and the inclination of the bottle mouth is more reliably prevented, and the plastic bottle is shifted to the depressed state. Can do.
- the first diameter rib and the second diameter rib may be arranged so as to be shifted in the circumferential direction around the bottle mouth portion in a top view.
- the bottle body portion may have a pressure absorbing surface that is deformed so as to bulge as the bottle shoulder moves to the depressed state.
- the pressure rise inside the plastic bottle can be absorbed by the bulging of the pressure absorbing surface during the deformation when the plastic bottle is shifted to the depressed state. Therefore, for example, when a top load is applied prior to storage in a cardboard box, it is possible to reduce the reaction force (force that acts on the bottle mouth from the inside of the plastic bottle) caused by an increase in internal pressure.
- the shoulder portion can be stably depressed to prevent the bottle mouth portion from being inclined, and the shoulder portion can be shifted to a depressed state capable of withstanding the top load when the cardboard boxes are stacked.
- FIG. 4A is an enlarged perspective view of the state before deformation of the plastic bottle of FIG. 1 as viewed from the upper surface side and the front side
- FIG. 5B is a state of deformation of the plastic bottle of FIG.
- FIG.5 (c) is the expansion perspective view seen from each of the upper surface side and the front side about the state after a deformation
- transformation of the plastic bottle of FIG. 6A is an enlarged perspective view of the plastic bottle of FIG. 1 in the initial deformation state
- FIG. 6B is an enlarged perspective view of the plastic bottle of FIG. (C) is an expanded perspective view of the state after a deformation
- It is a top view of the plastic bottle of FIG. 9A is an enlarged view around the shoulder portion of the plastic bottle of FIG. 7, and FIG.
- FIG. 9B is a half end view taken along the line YY of FIG. 9A. It is an expansion perspective view around the shoulder part of the plastic bottle which concerns on 3rd Embodiment. It is a top view of the plastic bottle of FIG. 12A is an enlarged view around the shoulder portion of the plastic bottle of FIG. 10, and FIG. 12B is a half end view taken along the line ZZ of FIG. 12A.
- FIG. 13A is a perspective view of a plastic bottle according to the fourth embodiment, and FIG. 13B is an enlarged perspective view around a shoulder portion of the plastic bottle of FIG.
- FIG. 14A is a perspective view of a plastic bottle according to the fifth embodiment, and FIG. 14B is an enlarged perspective view around the shoulder portion of the plastic bottle of FIG.
- a plastic bottle according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
- the direction where the bottle mouth is present is referred to as the upper side
- the direction where the bottle bottom is present is referred to as the lower side.
- a cross-sectional shape means a cross-sectional shape in a plane orthogonal to the central axis of the bottle.
- a plastic bottle 1 (hereinafter referred to as “bottle 1”) has a mouth portion 2, a shoulder portion 3, a trunk portion 4, and a bottom portion 5 in order from the upper side. These parts (2, 3, 4 and 5) are integrally formed and constitute a bottomed cylindrical bottle wall for storing a drink inside.
- a beverage it is suitable for storing non-carbonated beverages such as water, green tea, oolong tea, blended tea, sports drink or fruit juice.
- the bottle 1 is suitable for a large-sized bottle having a capacity exceeding 1 liter, and is used here for 2 liters as an example. However, the present invention is not limited to this, and 1 liter It can also be applied to less than bottles.
- the bottle 1 is molded by a stretch molding method such as biaxial stretch blow molding using, for example, a thermoplastic resin such as polyethylene, polypropylene, or polyethylene terephthalate as a main material.
- a thermoplastic resin such as polyethylene, polypropylene, or polyethylene terephthalate as a main material.
- a thermoplastic resin such as polyethylene, polypropylene, or polyethylene terephthalate as a main material.
- a thermoplastic resin is injected into a mold, and a preform is injection molded.
- the preform is composed of a mouth portion having the same shape as the mouth portion 2 and a bottomed cylindrical portion continuous to the lower side thereof.
- the preform is set on a blow molding machine and the tubular portion of the preform is heated. And while extending a cylindrical part to a vertical direction with an extending
- the stretched cylindrical portion is pressed against the inner surface
- the mouth part 2 has an open upper end and functions as a beverage spout.
- the opening of the mouth portion 2 is opened and closed by attaching and detaching the cap 21.
- the shoulder portion 3 has a lateral cross section that gradually expands downward. That is, the shoulder portion 3 expands downward so as to connect the mouth portion 2 having the smallest diameter in the bottle 1 to the upper end of the body portion 4 constituting the maximum width in the bottle 1.
- the twill line connecting the shoulder portion 3 and the upper end of the body portion 4 is a substantially sinusoidal curve extending alternately and repeatedly between the crest portion 12 and the trough portion 14 in the circumferential direction.
- the top portion of the mountain portion 12 is located in the middle of one side of the square, and the top portion of the valley portion 14 is located at the corner of the square.
- the body 4 is a rectangular tube-shaped portion based on a square cross-sectional shape. Specifically, as shown in FIG. 3, in the square cross-sectional shape of the body portion 4, the four corner portions 31 of the square are arcs, and the straight portion 33 is provided between the adjacent corner portions 31 and 31. As shown in FIGS. 1 and 2, the body portion 4 has a constricted portion 40 and a recessed portion 80 for inserting a finger in the middle in the vertical direction. As shown in FIG. 2, when the body portion 4 is divided into three areas in the vertical direction, the body portion 4 includes a constricted portion 40, an upper body portion 42 above the constricted portion 40, and a lower side of the constricted portion 40. And the lower body portion 44.
- the upper body portion 42 and the lower body portion 44 are portions having a constant square cross-sectional shape in the vertical direction.
- a plurality of continuous grooves 50 and a plurality of intermittent grooves 52 extending in the circumferential direction are alternately formed in the vertical direction.
- the pressure absorption surface 16 that is recessed toward the inside of the bottle 1 is formed on the upper side surface of the upper body portion 42.
- the shapes of the mouth part 2, the body part 4, and the bottom part 5 are not particularly limited, and can be appropriately designed.
- the shoulder portion 3 includes a plurality of first blocks 331 arranged in an annular shape around the mouth portion 2 and a plurality of second blocks 332 arranged in an annular shape on the outer periphery of the plurality of first blocks 331. .
- the first block 331 and the second block 332 are formed by projecting preforms from the inside to the outside of the bottle 1 and have a substantially rectangular shape when viewed from above.
- the first block 331 and the second block 332 are annularly arranged, so that the first circumferential rib which is an annular groove surrounding the periphery of the mouth 2 is provided between the mouth 2 and the first block 331.
- a second peripheral rib 312 is formed between the first block 331 and the second block 332 as an annular groove surrounding the first peripheral rib 311. Further, on the outer peripheral side of the second block 332, a third peripheral rib 313 that is an annular groove surrounding the outer periphery of the second peripheral rib 312 is formed.
- the first circumferential rib 311, the second circumferential rib 312, and the third circumferential rib 313 can each be regarded as a stepped portion or a bent portion formed on the shoulder portion 3 having a substantially truncated cone shape.
- the end portions 331a to 331c of the first block 331 are formed in a substantially linear shape.
- the second block 332 is also formed in a substantially linear shape at its end portions 332a to 332c.
- the first circumferential rib 311, the second circumferential rib 312, and the third circumferential rib 313 formed at the end portions of the first block 331 and the second block 332 are each a circle centered on the mouth portion 2 in a top view.
- a plurality of grooves each having a linear ridge line in contact with the ring form an annular shape.
- first diameter rib 321 is formed between the end portions 331b and 331b of the adjacent first blocks 331 and 331.
- second radial rib 322 is formed between the end portions 332 b and 332 b of the adjacent second blocks 332 and 332.
- Both the first diameter rib 321 and the second diameter rib 322 are grooves extending radially from the mouth 2 side toward the body 4 side. As shown in FIG. 3, the first diameter rib 321 and the second diameter rib 322 are arranged so as to be shifted by an angle ⁇ in the circumferential direction around the mouth portion 2 as viewed from above.
- first blocks 331 formed between the first circumferential rib 311 and the second circumferential rib 312, and a plurality formed between the second circumferential rib 312 and the third circumferential rib 313.
- a compressive load acts on the second block 332. Due to this compressive load, the first block 331 and the second block 332 are bent, and the shape becomes unstable.
- the first peripheral rib 311 and the second peripheral rib 312 are deformed as starting points, and the plurality of first blocks 331 are moved to the first block 331. It folds downward along the two circumferential ribs 312 and sinks downward.
- the adjacent first blocks 331 and 331 that are folded downward are also folded to the mouth 2 side so as to be close to each other with the first diameter rib 321 formed therebetween as a starting point.
- the pressure inside the bottle 1 rises as the shoulder 3 sinks inside the bottle. Due to this pressure increase, the pressure absorbing surface 16 bulges outward. Thereby, the rise in the internal pressure of the bottle 1 is absorbed.
- the plurality of first blocks 331 folded downward are provided with the first circumferential rib 311 and the second circumferential rib 312.
- a tensile load acts between the two.
- a compressive load continues to act between the second circumferential rib 312 and the third circumferential rib 313 on the plurality of second blocks 332.
- the second block 332 is bent due to this compressive load and buckled, as shown in FIG. 5C, the second peripheral rib 312 and the third peripheral rib 313 are deformed as a starting point, and a plurality of second The two blocks 332 are folded downward along the third circumferential rib 313 and depressed downward.
- the adjacent second blocks 332 and 332 that are folded downward are also folded to the mouth 2 side so as to be close to each other with the second diameter rib 322 formed therebetween as a starting point.
- the bottle 1 in the depressed state shown in FIG. 5 (c) is maintained in the depressed state even after the top load that has been actuated is released.
- a top load is further applied, a tensile load is generated in any of the plurality of first blocks 331 and the second blocks 332, and thus stable without buckling. Can withstand top load.
- the shoulder portion 3 is centered on the mouth portion 2 during the transition to the depressed state. It will be deformed to sink uniformly. That is, it is possible to shift to the depressed state without inclining the mouth portion 2 and to withstand a top load when the cardboard boxes are stacked.
- the shoulder 3 that has been depressed until then is pulled out from the trunk 4 so that it can be restored to the normal bottle shape.
- the shoulder 3 that has been depressed until then is pulled out from the trunk 4 so that it can be restored to the normal bottle shape.
- the bottle by deforming (falling) the bottle in advance during transportation and storage, it can withstand the top load when the cardboard boxes are stacked, and after restoration, it is restored to the normal bottle shape, It can be placed in the store as usual and used for drinking.
- the first circumferential rib 311, the second circumferential rib 312, and the third circumferential rib 313 each have an annular shape when a plurality of grooves each having a linear ridge line that is in contact with the circle centered on the mouth portion 2 in a top view. ing. For this reason, the shoulder 3 when the top load is applied prior to the storage in the cardboard box can be deformed so as to be folded back along the linear ridge line of the groove. Therefore, compared with the case where the ridgeline of the annular groove is curved, the inclination of the mouth portion 2 can be more reliably prevented, and the state can be shifted to a depressed state that can withstand the top load when the cardboard boxes are stacked. .
- the shoulder 3 can be stably depressed to prevent the mouth 2 from being inclined, and the shoulder 3 can be shifted to a depressed state capable of withstanding the top load when the cardboard boxes are stacked.
- a numerical analysis model of the bottle 1 was created by a general-purpose program, and the deformation and stress generated in the bottle 1 were evaluated by performing a structural analysis using a finite element method.
- the wall thickness of the numerical analysis model of the bottle 1 is reproduced as small as the plastic bottle manufactured by actual injection molding although it is minute.
- the numerical analysis model of the bottle 1 restrains the bottom portion and applies a downward load to the cap 21 in the vertical direction. Boundary conditions were set to work.
- bottle 1A (hereinafter referred to as “bottle 1A”) according to the second embodiment will be described with reference to FIGS.
- the bottle 1A is different from the bottle 1 in the shape of the periphery of the shoulder portion, and the same components are appropriately given the same reference numerals and description thereof is omitted.
- the shoulder 3A of the bottle 1A is formed with a first circumferential rib 311A that is an annular groove surrounding the periphery of the mouth 2 and a second circumferential rib 312A that is an annular groove surrounding the first circumferential rib 311A in a top view.
- a third peripheral rib 313 is formed that is an annular groove surrounding the outer periphery of the second peripheral rib 312. That is, the shoulder portion 3A has the first circumferential rib 311A, the second circumferential rib 312A, and the third circumferential rib 313 coaxially with the mouth portion 2.
- first circumferential rib 311A, the second circumferential rib 312A, and the third circumferential rib 313A can each be regarded as a stepped portion or a bent portion formed on the shoulder portion 3 having a substantially truncated cone shape.
- first circumferential rib 311A, the second circumferential rib 312A, and the third circumferential rib 313A do not have a linear ridgeline, and as shown in FIG. It is formed in an annular shape.
- the bottle 1A configured as described above, stress concentration occurs along the first circumferential rib 311A, the second circumferential rib 312A, and the third circumferential rib 313A when the top load acts.
- a compressive load acts on a portion between the first circumferential rib 311A and the second circumferential rib 312A and a portion between the second circumferential rib 312A and the third circumferential rib 313A.
- Local buckling occurs. Thereby, the bottle 1A can be shifted to a depressed state in which the upper part of the third circumferential rib 313A is depressed inward of the bottle.
- a plastic bottle 1B according to the third embodiment (hereinafter referred to as “bottle 1B”) will be described with reference to FIGS.
- the shape of the periphery of the shoulder portion of the bottle 1B is different from that of the bottle 1, and the same components are appropriately given the same reference numerals and description thereof is omitted.
- the shoulder portion 3B of the bottle 1B includes a plurality of first blocks 331B arranged in an annular shape around the mouth portion 2, and a plurality of first blocks arranged in an annular shape on the outer periphery of the plurality of first blocks 331B. It has two blocks 332B.
- the first block 331B has end portions 331Ba to 331Bc formed in a substantially linear shape.
- the second block 332B has end portions 332Ba to 332Bc formed in a substantially linear shape.
- each of the first circumferential rib 311B, the second circumferential rib 312B, and the third circumferential rib 313B has an annular shape by a plurality of grooves each having a linear ridge line that is in contact with a circle centering on the mouth portion 2 in a top view.
- the bottle 1 also has the first circumferential rib 311B, the second circumferential rib 312B, and the third circumferential rib 313B formed in order from the mouth 2 side by forming the first block 331B and the second block 332B. It is the same. Further, a first diameter rib 321B is formed between the end portions 331Bb and 331Bb of the adjacent first blocks 331B and 331B, and the end portions 332Bb and 332Bb of the adjacent second blocks 332B and 332B are The point that the two-diameter rib 322B is formed is the same as that of the bottle 1.
- the bottle 1B is different from the bottle 1 in the arrangement of the first diameter rib 321B and the second diameter rib 322B. That is, as described above, the first diameter ribs 321 and the second diameter ribs 322 of the bottle 1 are arranged so as to be shifted by an angle ⁇ in the circumferential direction around the mouth portion 2 when viewed from above (see FIG. 3). ), The first diameter rib 321B and the second diameter rib 322B of the bottle 1B are arranged on the same straight line (see FIG. 11).
- the bottle 1B configured as described above can also be deformed so that the shoulder portion 3B is folded back along the linear ridge line of the groove when the top load acts. Since the first diameter ribs 321B and the second diameter ribs 322B are arranged so as to be aligned on the same straight line, stress is transmitted along them when shifting to the depressed state. In this case, by reducing variations in thickness and the like, it is possible to suppress stress concentration and local deformation, and to uniformly collapse while maintaining symmetry.
- bottle 1C a plastic bottle 1C according to the fourth embodiment (hereinafter referred to as “bottle 1C”) will be described with reference to FIG.
- the bottle 1C is different from the bottle 1 in the shape of the periphery of the shoulder, and the same configuration is appropriately given the same reference numeral, and the description thereof is omitted. Further, in FIG. 13B, the illustration around the cap 21 is omitted.
- the shoulder portion 3C of the bottle 1C has a plurality of first blocks 331C arranged in an annular shape around the mouth portion 2, and a plurality of first blocks arranged in an annular shape on the outer periphery of the plurality of first blocks 331C. It has two blocks 332C.
- the first block 331C has end portions 331Ca, 331Cb, and 331Cc formed in a substantially linear shape.
- the second block 332C has end portions 332Ca, 332Cb, and 332Cc formed in a substantially linear shape.
- each of the first circumferential rib 311C, the second circumferential rib 312C, and the third circumferential rib 313C has an annular shape by connecting a plurality of grooves each having a linear ridge line that is in contact with a circle centering on the mouth portion 2 in a top view.
- the bottle 1 also has the point that the first peripheral rib 311C, the second peripheral rib 312C, and the third peripheral rib 313C are formed in order from the mouth 2 side by forming the first block 331C and the second block 332C. It is the same. Furthermore, a first radial rib 321C is formed between the end portions 331Cb and 331Cb of the adjacent first blocks 331C and 331C, and the end portions 332Cb and 332Cb of the adjacent second blocks 332C and 332C are The point that the two-diameter rib 322C is formed is the same as that of the bottle 1.
- the bottle 1C is different from the bottle 1 in the arrangement of the second diameter rib 322C. That is, in the bottle 1, the number of second blocks 332 arranged is the same as the number of the first blocks 331, whereas in the bottle 1C, the number of second blocks 332C arranged is 2 of the first block 331C. It has been doubled. Therefore, the number of second diameter ribs 322C disposed on the shoulder 3C of the bottle 1C is twice that of the bottle 1.
- the first diameter rib 321C and the second diameter rib 322C of the bottle 1C are arranged so as to be aligned on the same straight line, and the bottle 1C has a plurality of columnar shapes extending in the vertical direction inside the pressure absorption surface 16C. The difference from the bottle 1 is that the rib 16C1 is provided.
- the bottle 1C configured as described above can also be deformed so that the shoulder 3C is folded back along the linear ridge line of the groove when the top load acts. Since the first diameter rib 321 ⁇ / b> C and the second diameter rib 322 ⁇ / b> C are arranged so as to be aligned on the same straight line, stress is transmitted along these when the transition to the depressed state occurs. In this case, by reducing variations in thickness and the like, it is possible to suppress stress concentration and local deformation, and to uniformly collapse while maintaining symmetry.
- bottle 1D (hereinafter referred to as “bottle 1D”) according to a fifth embodiment will be described with reference to FIG.
- the bottle 1D is different from the bottle 1 in the shape of the periphery of the shoulder, and the same components are appropriately given the same reference numerals and the description thereof is omitted. Further, in FIG. 14B, the illustration around the cap 21 is omitted.
- the shoulder 3D of the bottle 1D is formed by stacking slopes 331D and 332D, which are parts of slopes of quadrangular pyramids having different sizes.
- the first circumferential rib 311D, the second circumferential rib 312D, and the third circumferential rib 313D having linear ridge lines are formed in steps around the inclined surfaces 331D and 332D so as to surround the mouth portion 2.
- the first circumferential rib 311D, the second circumferential rib 312D, and the third circumferential rib 313D are all formed in a quadrangular annular shape with rounded corners.
- the top load acts to fold back the shoulder portion 3D along the linear ridge line of the step, suppress stress concentration and local deformation, and maintain symmetry. It becomes possible to sink into the uniform as it is.
- the embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention.
- the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, but can be changed as appropriate.
- the number of peripheral ribs (311, 312, 313) can be three or more. For example, if the head space can be made relatively large, the number of peripheral ribs should be increased to three or more.
- drum 4 can be made into a rectangle.
- At least one of the first circumferential rib 311, the second circumferential rib 312, and the third circumferential rib 313 can be formed into a flat annular shape, or an elliptical circumferential rib and a perfect annular circumferential rib. It is also possible to combine various types of peripheral ribs such as Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.
- 1 bottle (plastic bottle), 2: mouth part (bottle mouth part), 3: shoulder part (bottle shoulder part), 4: body part (bottle body part), 16: pressure absorbing surface, 311: first round Rib, 312: second circumferential rib, 313: third circumferential rib, 321: first diameter rib, 322: second diameter rib
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- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
以下の説明では、ボトルの口部が存在する方を上側とし、ボトルの底部が存在する方を下側とする。横断面形状とは、ボトルの中心軸に直交する平面における断面形状を意味する。
図1~4に示すように、プラスチックボトル1(以下、「ボトル1」という。)は、上側から順に、口部2、肩部3、胴部4及び底部5を有する。これらの部分(2、3、4及び5)は、一体に形成され、内部に飲料を貯留するための有底筒状のボトル壁を構成する。飲料としては、水、緑茶、ウーロン茶、ブレンド茶、スポーツドリンク又は果汁等の非炭酸飲料を貯留するのに適している。また、ボトル1は、容量が1リットルを超えるような大型サイズのボトルに適したものであり、ここでは例として2リットル用としているが、本発明はこれに限定されるものではなく、1リットル未満のボトルに適用することもできる。
ボトル1の製造工程の一例を説明する。先ず、金型内に熱可塑性樹脂を射出し、プリフォームを射出成形する。プリフォームは、口部2と同形状の口部と、その下側に連なる有底の筒状部と、で構成される。射出成形後は、プリフォームをブロー成形機にセットして、プリフォームの筒状部を加熱する。そして、延伸ロッドによって筒状部を縦方向に延伸させると共に、圧縮空気を吹き込んで筒状部を横方向に延伸させる。延伸させた筒状部の部位を金型の内面に押し付け、その後固化させる。これにより、肩部3、胴部4及び底部5が成形され、ボトル1の一連の成形が完了する。
次に、図7~図9を参照して、第2実施形態に係るプラスチックボトル1A(以下、「ボトル1A」という。)について説明する。ボトル1Aは、肩部周辺の形状がボトル1と異なっており、同一の構成については適宜同一の符合を付して、説明を省略する。
次に、図10~図12を参照して、第3実施形態に係るプラスチックボトル1B(以下、「ボトル1B」という。)について説明する。ボトル1Bは、肩部周辺の形状がボトル1と異なっており、同一の構成については適宜同一の符合を付して、説明を省略する。
次に、図13を参照して、第4実施形態に係るプラスチックボトル1C(以下、「ボトル1C」という。)について説明する。ボトル1Cは、肩部周辺の形状がボトル1と異なっており、同一の構成については適宜同一の符合を付して、説明を省略する。また、図13(b)では、キャップ21周辺の図示を省略している。
次に、図14を参照して、第5実施形態に係るプラスチックボトル1D(以下、「ボトル1D」という。)について説明する。ボトル1Dは、肩部周辺の形状がボトル1と異なっており、同一の構成については適宜同一の符合を付して、説明を省略する。また、図14(b)では、キャップ21周辺の図示を省略している。
Claims (5)
- 内容物の注ぎ口となるボトル口部と、ボトル胴部と、前記ボトル口部と前記ボトル胴部とをつなぐように下方にかけて拡大するボトル肩部と、有するプラスチックボトルであって、
前記ボトル肩部は、前記ボトル口部と同軸上に、上側から順番に、それぞれ環状である第1周リブ、第2周リブ及び第3周リブを有し、且つ、当該プラスチックボトルにトップロードが作用したときに前記第1周リブ、前記第2周リブ及び前記第3周リブを起点として変形して下方に陥没する陥没状態に移行するとともに、当該トップロードが解放された後も当該陥没状態を維持可能に構成されている、プラスチックボトル。 - 前記第1周リブ、前記第2周リブ及び前記第3周リブの少なくとも1つが、直線状の稜線が複数連なることで環状を呈している、請求項1に記載のプラスチックボトル。
- 前記ボトル肩部は、
前記第1周リブと前記第2周リブとの間に、前記ボトル口部側から前記ボトル胴部側に向けて放射状に延びる第1径リブを有し、
前記第2周リブと前記第3周リブとの間に、前記ボトル口部側から前記ボトル胴部側に向けて放射状に延びる第2径リブを有している、請求項1又は2に記載のプラスチックボトル。 - 前記第1径リブ及び前記第2径リブは、上面視で、前記ボトル口部を中心として周方向にずらして配置されている、請求項3に記載のプラスチックボトル。
- 前記ボトル胴部は、前記ボトル肩部の前記陥没状態への移行に伴って膨出するように変形する加圧吸収面を有している、請求項4に記載のプラスチックボトル。
Priority Applications (6)
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AU2014354043A AU2014354043B2 (en) | 2013-11-22 | 2014-11-21 | Plastic bottle |
DK14864758.9T DK3072825T3 (en) | 2013-11-22 | 2014-11-21 | PLASTIC BOTTLE |
EP14864758.9A EP3072825B1 (en) | 2013-11-22 | 2014-11-21 | Plastic bottle |
CN201480073287.9A CN105916776A (zh) | 2013-11-22 | 2014-11-21 | 塑料瓶 |
AU2018211260A AU2018211260A1 (en) | 2013-11-22 | 2018-08-01 | Plastic bottle |
AU2020201868A AU2020201868B2 (en) | 2013-11-22 | 2020-03-13 | Plastic bottle |
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JP2013242267A JP6537770B2 (ja) | 2013-11-22 | 2013-11-22 | プラスチックボトル |
JP2013-242267 | 2013-11-22 |
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WO2015076362A1 true WO2015076362A1 (ja) | 2015-05-28 |
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PCT/JP2014/080870 WO2015076362A1 (ja) | 2013-11-22 | 2014-11-21 | プラスチックボトル |
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EP (1) | EP3072825B1 (ja) |
JP (1) | JP6537770B2 (ja) |
CN (1) | CN105916776A (ja) |
AU (3) | AU2014354043B2 (ja) |
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WO (1) | WO2015076362A1 (ja) |
Cited By (2)
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US11273946B2 (en) * | 2018-06-29 | 2022-03-15 | Yoshino Kogyosho Co., Ltd. | Bottle in which deformation of a body portion at the time of pressure reduction can be inhibited |
WO2023220675A3 (en) * | 2022-05-12 | 2023-12-14 | Noah Hammersten | Expandable bottle |
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JP6756100B2 (ja) * | 2015-11-30 | 2020-09-16 | 東洋製罐株式会社 | 合成樹脂製容器 |
WO2018149661A1 (de) | 2017-02-14 | 2018-08-23 | Basf Se | Behälter mit rillen |
JP7217406B2 (ja) * | 2018-05-28 | 2023-02-03 | キョーラク株式会社 | プラスチック容器 |
JP7180254B2 (ja) * | 2018-09-28 | 2022-11-30 | 大日本印刷株式会社 | プラスチックボトル |
JP7422638B2 (ja) | 2020-10-15 | 2024-01-26 | 株式会社吉野工業所 | 二重容器 |
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- 2013-11-22 JP JP2013242267A patent/JP6537770B2/ja active Active
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2014
- 2014-11-21 DK DK14864758.9T patent/DK3072825T3/en active
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- 2014-11-21 AU AU2014354043A patent/AU2014354043B2/en active Active
- 2014-11-21 EP EP14864758.9A patent/EP3072825B1/en active Active
- 2014-11-21 CN CN201480073287.9A patent/CN105916776A/zh active Pending
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JP2010260588A (ja) * | 2009-04-30 | 2010-11-18 | Yoshino Kogyosho Co Ltd | 詰め替え容器 |
JP2011116427A (ja) | 2009-12-07 | 2011-06-16 | Kirin Brewery Co Ltd | 飲料用プラスチック容器及びそれを用いた飲料製品 |
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US11273946B2 (en) * | 2018-06-29 | 2022-03-15 | Yoshino Kogyosho Co., Ltd. | Bottle in which deformation of a body portion at the time of pressure reduction can be inhibited |
WO2023220675A3 (en) * | 2022-05-12 | 2023-12-14 | Noah Hammersten | Expandable bottle |
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AU2020201868B2 (en) | 2021-12-09 |
AU2014354043A1 (en) | 2016-07-07 |
CN105916776A (zh) | 2016-08-31 |
EP3072825A4 (en) | 2017-05-31 |
EP3072825B1 (en) | 2018-09-05 |
DK3072825T3 (en) | 2019-01-07 |
AU2014354043B2 (en) | 2018-08-16 |
AU2018211260A1 (en) | 2018-08-16 |
JP2015101361A (ja) | 2015-06-04 |
AU2020201868A1 (en) | 2020-04-02 |
JP6537770B2 (ja) | 2019-07-03 |
EP3072825A1 (en) | 2016-09-28 |
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