JP6462366B2 - Plastic bottle - Google Patents

Description

  The present invention relates to a plastic bottle used as a beverage packaging container or the like.

  In recent years, weight reduction of plastic bottles has been demanded in order to reduce material costs and environmental impact. If the weight is reduced while maintaining the capacity of the plastic bottle, the thickness of the bottle is reduced, so that the rigidity is lowered. As a result, when the user drinks the plastic bottle containing the beverage and holding the bottle, the bottle may be easily deformed, which may cause a problem in handling the bottle by the user.

  In consideration of such circumstances, a plastic bottle has been proposed in which a plurality of corrugated circumferential grooves extending in the circumferential direction of the barrel portion are formed in the bottle vertical direction in order to increase the rigidity of the barrel portion of the plastic bottle. (Patent Document 1).

JP 2013-154907 A

  The plastic bottle of Patent Document 1 has an effect of increasing the rigidity of the body part because the corrugated peripheral edge is formed in the body part, but it may not be sufficient in terms of the gripping property of the bottle.

  Then, an object of this invention is to provide the plastic bottle which can improve the grip property by a user.

The plastic bottle of the present invention is a plastic bottle (1A to 1E) provided with a cylindrical body part (3), and the body part has a concavo-convex part (13) extending in a streak shape with respect to the body part. A plurality of annular reinforcing portions (12) extending so as to make a round of the body portion while inclining and intersecting each other are formed , and each of the concave and convex portions of the plurality of annular reinforcing portions recedes to the inner side of the plastic bottle. At the portion where the annular reinforcing portions intersect with each other formed by a plurality of grooves (13a), the two annular reinforcing portions intersect so that one annular reinforcing portion divides the other annular reinforcing portion. It is what.

  According to this plastic bottle, since the plurality of annular reinforcing portions that make a round of the trunk portion intersect with each other, the rigidity of the trunk portion is enhanced by the intersecting portions existing in the trunk portion. In addition, since the plurality of annular reinforcing portions extend in an oblique direction with respect to the body portion, each user's grip when the user grips the body portion as compared with the case where the annular reinforcing portion extends in the left-right direction of the bottle and makes a round. A finger and a plurality of annular reinforcement parts are easy to fit. Thereby, the grip property of the user who handles a plastic bottle can be improved.

  In one aspect of the plastic bottle of the present invention, the plurality of annular reinforcing portions may be arranged at equal intervals while being out of phase with respect to the circumferential direction of the body portion. According to this aspect, since the intersecting portions where the annular reinforcing portions intersect with each other are arranged at equal intervals in the circumferential direction of the trunk portion, there is an advantage that the bias of rigidity in the circumferential direction of the trunk portion is reduced.

  In this aspect, the plurality of annular reinforcing portions may have the same inclination angle (θ) with respect to the left-right direction of the body portion. In this case, since the plurality of intersecting portions formed in the body portion are not only arranged at equal intervals, but also aligned in the bottle height direction, there is an advantage that the rigidity deviation of the body portion in the bottle height direction is reduced. There is.

  In one aspect of the plastic bottle of the present invention, the body portion is provided with a grip portion (15) defined by each upper end portion (12a) and each lower end portion (12b) of the plurality of annular reinforcing portions, The ratio of the surface area of the plurality of annular reinforcing portions to the entire gripping portion may be 57% or more and 84% or less. According to this aspect, it is possible to obtain a plastic bottle with good gripping ability by the user. Further, in one aspect of the plastic bottle of the present invention, the body portion is provided with a grip portion (15) defined by each upper end portion (12a) and each lower end portion (12b) of the plurality of annular reinforcing portions. The number of the plurality of annular reinforcing portions may be 3 or more and 6 or less. According to these aspects, it is possible to obtain a plastic bottle with good gripping ability by the user. In addition, the numerical range of the ratio of the surface area of the plurality of annular reinforcing portions in the entire specified gripping portion: 57% or more and 84% or less, and the numerical range of the number of the plurality of annular reinforcing portions: 3 or more and 6 or less And may be satisfied respectively. In this case, gripping ability by the user is further improved.

  In one aspect of the plastic bottle of the present invention, the body portion is provided with a grip portion (15) defined by each upper end portion (12a) and each lower end portion (12b) of the plurality of annular reinforcing portions, The inclination angle (θ) with respect to the left-right direction of the body portion may be in the range of 28 ° to 48 °. According to this aspect, it is possible to obtain a plastic bottle with good gripping ability by the user. In this aspect, after satisfying the condition of the numerical range of the inclination angle, the number of the annular reinforcing portions is 3, and the ratio of the surface area of the annular reinforcing portion to the entire gripping portion is 57%. You may satisfy | fill the at least 1 conditions that it is more than 78% or less. In this case, gripping ability by the user is further improved.

  1 aspect of the plastic bottle of this invention WHEREIN: The area | region where the said some annular reinforcement part is not formed among the said trunk | drums, the recessed part (20) which retracts to the bottle inner side, and the convex part which protrudes to the bottle outer side A plurality of at least one may be provided. According to this aspect, the region in which the plurality of annular reinforcing portions are not formed is configured by a curved surface with unevenness, so that it is difficult to slip when the user grips compared to the case where the region is configured by a smooth curved surface. Is further improved.

  In the present invention, “extends so as to make a round of the trunk” does not require that the annular reinforcing portions are completely connected, and the annular reinforcing portions are partially cut off at the intersecting portions. Is also included. Moreover, in the above description, in order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are added in parentheses, but the present invention is not limited to the illustrated form.

  As described above, according to the plastic bottle of the present invention, since the plurality of annular reinforcing portions that make a round of the trunk portion intersect with each other, the rigidity of the trunk portion is enhanced by the intersecting portions existing in the trunk portion. In addition, since the plurality of annular reinforcing portions extend in an oblique direction with respect to the body portion, each user's grip when the user grips the body portion as compared with the case where the annular reinforcing portion extends in the left-right direction of the bottle and makes a round. A finger and a plurality of annular reinforcement parts are easy to fit. Thereby, the grip property of the user who handles a plastic bottle can be improved.

The front view of the plastic bottle which concerns on the 1st form of this invention. The fragmentary sectional view regarding the II-II line of FIG. The front view of the plastic bottle which concerns on the 2nd form of this invention. The front view of the plastic bottle which concerns on the 3rd form of this invention. The front view of the plastic bottle which concerns on the 4th form of this invention. The front view of the plastic bottle which concerns on the 5th form of this invention. The figure which showed the calculation method of the surface area of the non-formation area | region of the sample A. FIG. The figure which showed the calculation method of the surface area of the non-formation area | region of the sample B. FIG. The figure which showed the calculation method of the surface area of the non-formation area | region of the sample C. FIG. The figure which showed the calculation method of the surface area of the non-formation area | region of the sample D. FIG. The figure which showed the calculation method of the surface area of the non-formation area | region of the sample E. FIG. The figure which showed the calculation method of the surface area of the non-formation area | region of the sample X. FIG. The 1st figure which showed the measurement result and evaluation result of the surface area of each part. The figure which showed the calculation method of the surface area of the non-formation area | region of sample B1. The figure which showed the calculation method of the surface area of the non-formation area | region of sample B2. The figure which showed the calculation method of the surface area of the non-formation area | region of sample B4. The 2nd figure which showed the measurement result and evaluation result of the surface area of each part. The front view which showed an example of the form which made the non-formation area | region the uneven | corrugated curved surface.

(First form)
The plastic bottle 1A shown in FIG. 1 is manufactured by blow molding using polyethylene terephthalate (PET), which is a kind of plastic. The plastic bottle 1A is designed assuming a packaging container for non-carbonated beverages such as mineral water, green tea, and black tea. In general, a non-carbonated beverage packaging container can be made lighter and thinner than a packaging container containing a carbonated beverage that requires pressure resistance because the non-carbonated beverage is a content.

  The plastic bottle 1A has a capacity capable of containing 500 mL of liquid, and is configured as a so-called round bottle having a circular shape when viewed from above and below the bottle. The up-down direction of the bottle coincides with the up-down direction of FIG. 1 and the like, and the left-right direction of the bottle coincides with the left-right direction of FIG.

  The plastic bottle 1A includes a mouth part 2 that functions as a spout or a drinking mouth for contents, a cylindrical body part 3 that extends in the vertical direction of the bottle, a shoulder part 4 that connects the mouth part 2 and the body part, The bottom part 5 which closes the lower end of the part 3 is provided. A male screw is formed around the mouth 2, and a cap (not shown) is screwed into the male screw so that the mouth 2 is closed and sealed. The body portion 3 is formed with a waist portion 10 which is located below the center in the height direction and whose outer peripheral dimension is narrower than other portions. Moreover, between the shoulder part 4 and the waist part 10, the four reinforcement grooves 11 extended in the circumferential direction of the trunk | drum 3 and retreating to the bottle inner side are mainly formed in order to improve rigidity. The detailed arrangement and function of each reinforcing groove 11 are not related to the present invention, and thus the description thereof is omitted.

  Two annular reinforcing portions 12 intersecting each other are formed on the body portion 3. Each annular reinforcing portion 12 is inclined with respect to the body portion 3 and extends around the body portion 3 while being inclined at an inclination angle θ of 48 ° with respect to the left-right direction of the bottle in this embodiment. The two annular reinforcing portions 12 are 180 ° out of phase with respect to the circumferential direction of the body portion 3, and are arranged at equal intervals in the circumferential direction of the body portion 3. Note that the inclination angle θ is an inclination angle of the annular reinforcing portion 12 with respect to the left-right direction of the bottle, and strictly speaking, is an angle defined on a projection view such as FIG. That is, the inclination angle θ is defined as a depression angle between the center line CL of the annular reinforcing portion projected on the projection and the reference line Ls parallel to the left-right direction of the bottle.

  As shown in FIG. 2, each annular reinforcing portion 12 has a concavo-convex portion 13 extending in a streak shape. The concavo-convex portion 13 is formed by three grooves 13a that recede toward the inside of the bottle. The two annular reinforcing portions 12 intersect with each other at the intersecting portion 14, and it appears that one annular reinforcing portion 12 overlaps the other annular reinforcing portion 12 in appearance. Actually, the two annular reinforcing portions 12 cross each other in a form in which one of them divides the other. Since the two annular reinforcing portions 12 are 180 ° out of phase, the intersecting portion 14 also exists on the back side of FIG. 1, and the two annular reinforcing portions 12 intersect each other at two intersecting portions 14. In the body portion 3, a grip portion 15 that is assumed to be gripped by the user is defined by an upper end 12 a and a lower end 12 b of each annular reinforcing portion 12. The upper end 12 a means the uppermost part of the annular reinforcing part 12, and the lower end 12 b means the lowermost part of the annular reinforcing part 12.

  According to the plastic bottle 1 </ b> A, the annular reinforcing portion 12 having the uneven portion 13 is formed in the body portion 3, so that the rigidity of the body portion 3 is improved as compared with a smooth curved surface without the uneven portion 13. Further, since the two annular reinforcing portions 12 intersect each other at the intersecting portion 14, the rigidity of the trunk portion 3 is enhanced by the intersecting portion 14 existing in the trunk portion 3. Since each annular reinforcing portion 12 extends in an oblique direction with respect to the body portion 3, when the user grips the body portion 3 as compared with the case where the user simply grips the body portion 3 in the left-right direction of the bottle, It becomes easy to fit each annular reinforcement part 12. Thereby, a user's grip property can be improved.

(Second form)
Next, a second embodiment of the present invention will be described with reference to FIG. Hereinafter, the same reference numerals are assigned to the same members or parts as those in the first embodiment, and the description thereof is omitted. The plastic bottle 1B of the second form is provided with three annular reinforcing portions 12 on the body portion 3 thereof. The configuration of each annular reinforcing portion 12 is the same as in the case of the first embodiment, and has an uneven portion 13 formed by three grooves 13a. Each annular reinforcing portion 12 has an inclination angle θ of 48 °. The three annular reinforcing portions 12 are 120 ° out of phase with respect to the circumferential direction of the body portion 3 and are arranged at equal intervals in the circumferential direction of the body portion 3. Therefore, six intersecting portions 14 are formed in the grip portion 15 of the trunk portion 3.

  According to the plastic bottle 1B, the number of the intersecting portions 14 is increased as compared with the first embodiment, and the ratio of the surface area of the annular reinforcing portion 12 occupying the grip portion 15 is increased. At the same time, the rigidity of the body portion 3 is enhanced as compared with the first embodiment. Therefore, the gripping property of the user is further improved.

(Third form)
Next, a third embodiment of the present invention will be described with reference to FIG. Hereinafter, the same reference numerals are assigned to the same members or parts as those in the first embodiment, and the description thereof is omitted. The plastic bottle 1 </ b> C of the third form is provided with four annular reinforcing portions 12 on the body portion 3. The configuration of each annular reinforcing portion 12 is the same as in the case of the first embodiment, and has an uneven portion 13 formed by three grooves 1a. Each annular reinforcing portion 12 has an inclination angle θ of 48 °. The four annular reinforcing portions 12 are 90 ° out of phase with respect to the circumferential direction of the body portion 3 and are arranged at equal intervals in the circumferential direction of the body portion 3. Therefore, 12 intersections 14 are formed in the gripping part 15 of the body 3.

  According to the plastic bottle 1C, the number of intersecting portions 14 is increased as compared with the first and second configurations, and the ratio of the surface area of the annular reinforcing portion 12 occupying the grip portion 15 is increased. While having an effect, the rigidity of the trunk | drum 3 is strengthened rather than the 1st and 2nd form. Therefore, the gripping property of the user is further improved.

(4th form)
Next, a fourth embodiment of the present invention will be described with reference to FIG. Hereinafter, the same reference numerals are assigned to the same members or parts as those in the first embodiment, and the description thereof is omitted. The plastic bottle 1D of the fourth embodiment is provided with five annular reinforcing portions 12 on the body portion 3 thereof. The configuration of each annular reinforcing portion 12 is the same as in the case of the first embodiment, and has an uneven portion 13 formed by three grooves 13a. Each annular reinforcing portion 12 has an inclination angle θ of 48 °. The five annular reinforcing portions 12 are out of phase by 72 ° with respect to the circumferential direction of the body portion 3, and are arranged at equal intervals in the circumferential direction of the body portion 3. Therefore, 20 intersection portions 14 are formed in the grip portion 15 of the trunk portion 3.

  According to the plastic bottle 1C, the number of the intersecting portions 14 is increased as compared with the first to third embodiments, and the ratio of the surface area of the annular reinforcing portion 12 occupying the grip portion 15 is increased. While having an effect, the rigidity of the trunk | drum 3 is strengthened rather than the 1st-3rd form. Therefore, the gripping property of the user is further improved.

(5th form)
Next, a fifth embodiment of the present invention will be described with reference to FIG. Hereinafter, the same reference numerals are assigned to the same members or parts as those in the first embodiment, and the description thereof is omitted. The plastic bottle 1E according to the fifth embodiment is provided with six annular reinforcing portions 12 on the body portion 3 thereof. The configuration of each annular reinforcing portion 12 is the same as in the case of the first embodiment, and has an uneven portion 13 formed by three grooves 13a. Each annular reinforcing portion 12 has an inclination angle θ of 48 °. The four annular reinforcing portions 12 are out of phase by 60 ° with respect to the circumferential direction of the body portion 3 and are arranged at equal intervals in the circumferential direction of the body portion 3. Therefore, 30 intersections 14 are formed in the body 3.

  According to the plastic bottle 1E, the number of intersecting portions 14 is increased as compared with the first to fourth embodiments, and the proportion of the surface area of the annular reinforcing portion 12 occupying the grip portion 15 is increased. While having an effect, the rigidity of the trunk | drum 3 is strengthened rather than the 1st-4th form. Therefore, the gripping ability of the user who handles the plastic bottle 1C is further improved.

  In the plastic bottles 1 </ b> A to 1 </ b> E of the above embodiments, the plurality of annular reinforcing portions 12 are arranged at equal intervals with the phases shifted from each other with respect to the circumferential direction of the barrel portion 3. It arrange | positions at equal intervals regarding a direction. Thereby, there is an advantage that the deviation of rigidity in the circumferential direction of the body portion 3 is reduced. In addition, since the plastic bottles 1A to 1E of each of the above forms have the same inclination angle θ, the plurality of intersecting portions 14 formed in the body portion 3 are not only arranged at equal intervals, but also the bottle height. Since they are aligned in the direction, there is an advantage that the deviation of rigidity in the bottle height direction of the body portion 3 is reduced.

(Discussion 1)
It has been confirmed that the plastic bottles 1A to 1E of the above-described forms have different numbers of the annular reinforcing portions 12, but it becomes clear that the gripping ability of the user improves as the number of the annular reinforcing portions 12 increases. As the number of the annular reinforcing portions 12 increases, the number of crossing portions 14 formed on the gripping portion 15 increases and the surface area ratio of the annular reinforcing portion 12 in the gripping portion 15 increases. When this ratio increases, many uneven portions 13 exist in the gripping portion 15 of the trunk portion 3, so that not only the rigidity of the trunk portion 3 is improved but also the slipping difficulty increases, thereby contributing to the improvement of the gripping property. It is thought that.

  Therefore, the ratio of the surface area of the annular reinforcing portion 12 to the gripping portion 15 is calculated and gripped for the comparative example in which the plastic bottles 1A to 1E and the annular reinforcing portion 12 of each of the above forms are one by the method described below. We examined the relationship with sex. In addition, the inclination angle θ of the annular reinforcing portion 12 of the comparative example is 48 °, which is the same as that in the above embodiments.

  Samples A to E of plastic bottles 1A to 1E and sample X of a comparative example were prepared, and the external shapes of these samples A to E and sample X were measured by three-dimensional measurement, and a 3D model of each sample was formed on a computer. . Then, using the commercially available 3D CAD software for each 3D model, the surface area of the entire gripping part 15, the formation area of the annular reinforcement part 12, and the non-formation area of the annular reinforcement part 12 are determined. Measured. The entire surface area of the gripping portion 15 includes the surface areas of the formation region and the non-formation region of the annular reinforcement portion 12.

  The non-formation region is a combination of the regions indicated by hatching in each of FIGS. Since a plurality of regions of the non-formed region are regularly present in the circumferential direction of the body portion 3, the surface area of the non-formed region was calculated as follows.

  That is, the surface area Sa of the non-formed region of the sample A in FIG. 7 is twice the sum of the regions 1a to 3a, and the surface area Sb of the non-formed region of the sample B in FIG. 8 is three times the sum of the regions 1b to 4b. 9, the surface area Sc of the non-formed region of the sample C in FIG. 9 is four times the total of the regions 1c to 6c, and the surface area Sd of the non-formed region of the sample D in FIG. 10 is five times the total of the regions 1d to 6d. 11, the surface area Se of the non-formation region of the sample E in FIG. 11 was 6 times the total of the regions 1e to 7e, and the respective calculation results were used. In the sample X of the comparative example of FIG. 12, the total of the regions 1x and 2x is defined as the surface area Sx of the non-formed region.

  The measurement result of the surface area of each part regarding the samples A to C and the sample X and the evaluation result of these gripping properties are as shown in FIG. As is apparent from this figure, when the number of the annular reinforcing portions 12 is 3 or more and 6 or less, the ratio of the surface area of the annular reinforcing portion 12 to the entire gripping portion 15 is 57% or more and 84% or less. It is preferable.

(Discussion 2)
The inclination angle θ of the annular reinforcing portion 12 only needs to be inclined at least with respect to the body portion 3, but it is estimated that the fit when the user grips affects the inclination angle θ. That is, it is estimated that the inclination angle θ of the annular reinforcing portion 12 affects the gripping property. Therefore, the following samples B1 to B4 having different inclination angles θ for three annular reinforcing portions 12 are prepared, and the surface area of each portion of each of the samples B1 to B4 is measured by the same method as in the above consideration 1 and the gripping property Evaluated. Of the samples B1 to B4, the sample B3 is the same as the sample B used in the above consideration 1. Moreover, since the holding part 15 is prescribed | regulated by the upper end 12a and the lower end 12b of each cyclic | annular reinforcement part 12 as mentioned above, the vertical dimension of the holding part 15 of samples B1-B4 differs mutually.

Sample B1: θ = 28 °
Sample B2: θ = 38 °
Sample B3: θ = 48 °
Sample B4: θ = 58 °

  The surface area of each part of the samples B1, B2, and B4 was measured based on FIGS. 14 to 16, and the ratio of the surface area of the annular reinforcing part 12 to the grip part 15 was calculated. Sample B3 is the same as in the case of the above consideration 1 (FIG. 8). The surface area Sb1 of the non-formed region of the sample B1 in FIG. 14 is three times the sum of the regions 1b1 to 4b1, and the surface area Sb2 of the non-formed region of the sample B2 in FIG. 15 is three times the sum of the regions 1b2 to 4b2. 16, the surface area Sb4 of the non-formation region of the sample B4 in FIG. 16 was set to 3 times the total of the regions 1b4 to 4b4 as the respective calculation results. The surface area Sb3 of the non-formation region of the sample B3 is equal to the surface area Sb (see FIG. 8).

  The measurement result of the surface area of each part regarding the samples B1 to B4 and the evaluation result of these gripping properties are as shown in FIG. As is clear from this figure, when the number of the annular reinforcing portions 12 is 3, the inclination angle θ is preferably in the range of 28 ° to 48 °, and the surface area of the annular reinforcing portion 12 occupying the entire gripping portion 15. Is preferably 57% or more and 78% or less. Further, when the gripping property was evaluated for the samples B1 to B4, it was found that the gripping property was improved as the inclination angle θ was decreased.

(Modification)
The plastic bottle of this invention is not limited to the said form, It can implement with a various form within the range of the summary of this invention. The material of the plastic bottle is not limited, and any material may be used as long as it belongs to the category of plastic. For example, a plastic bottle made of a polyolefin such as polyethylene or polypropylene may be used. The use of the plastic bottle is not necessarily limited to beverage packaging containers. For example, it may be a plastic bottle used as a packaging container for liquid foods such as liquid seasonings such as vegetable oil and soy sauce. Alternatively, it may be a plastic bottle used as a packaging container for liquid non-food such as liquid chemicals and detergents. Moreover, if it is a plastic bottle in which the some annular reinforcement part is formed, there will be no restriction | limiting also in the capacity | capacitance.

  In the plastic bottles of the above-mentioned forms, the non-formed region where the annular reinforcing portion is not formed is a smooth curved surface. For example, like the plastic bottle 1B ′ shown in FIG. 18, the plastic bottle 1B ′ shown in FIG. It is also possible to implement the present invention in a form in which the non-formation region is formed as a curved surface having irregularities by forming a plurality of recesses 20. When the non-formation area is a curved surface having irregularities, the slippage difficulty when the user grips is further improved as compared with the case where the non-formation area is a smooth curved surface. The plurality of recesses 20 may be provided not only in the non-formation region but also in the region of the body portion 3 other than the grip portion 15. That is, a plurality of recesses 20 may be provided in the region of the body portion 3 where the annular reinforcing portion is not provided. Further, instead of the plurality of recesses 20..., A plurality of projections (not shown) protruding to the outside of the bottle can be formed in the region of the body portion 3 where the non-formation region or the annular reinforcement portion is not provided. Furthermore, a plurality of recesses that recede toward the bottle inner side and protrusions that protrude toward the bottle outer side can be formed in the non-formation region or the region of the body portion 3 where the annular reinforcement portion is not provided.

Any number of annular reinforcing portions may be used as long as it is plural. When the plurality of annular reinforcing portions are arranged out of phase with respect to the circumferential direction of the body portion, the number of intersections where the annular reinforcing portions intersect each other can be specified by the following equation. However, _{a n} is the number of intersections, n (n = 2,3,4,5,6, ... ) is the number of annular reinforcing portion.

a _n = n ² −n

  In each of the above embodiments, the uneven portion 13 constituting the annular reinforcing portion 12 is formed by three grooves 13a, but the number of grooves 13a forming the uneven portion 13 is not limited. Therefore, the number of the grooves 13a may be one or a plurality of grooves other than three. Moreover, although the groove | channel 13a retreats inside a bottle, this invention can also be implemented with the form which forms an uneven | corrugated | grooved part by the 1 or several protrusion which protrudes in the bottle outer side. The width of the annular reinforcing portion is not limited to the illustrated form, and may be set arbitrarily. Further, all the annular reinforcing portions do not have to have the same width.

1A to 1E Plastic bottle 3 Body 12 Annular reinforcing part 12a Upper end 12b Lower end 13 Concavity and convexity part 15 Grasping part 20 Concave part θ Incline

Claims (5)

In a plastic bottle with a cylindrical body,
A plurality of annular reinforcing portions are formed in the body portion, having a concavo-convex portion extending in a line shape, extending so as to go around the body portion while inclining with respect to the body portion, and intersecting each other ,
Each uneven portion of the plurality of annular reinforcing portions is formed by a plurality of grooves that recede to the inner side of the plastic bottle,
In the portion where the annular reinforcing portions intersect, the two annular reinforcing portions intersect so that one annular reinforcing portion divides the other annular reinforcing portion ,
A plastic bottle characterized by that.   2. The plastic bottle according to claim 1, wherein the plurality of annular reinforcing portions are arranged at equal intervals while being out of phase with respect to a circumferential direction of the body portion. The body portion is provided with a grip portion defined by each upper end portion and each lower end portion of the plurality of annular reinforcing portions,
The plastic bottle according to claim 1 or 2 , wherein a ratio of a surface area of the plurality of annular reinforcing portions to the entire gripping portion is 57% or more and 84% or less. The body portion is provided with a grip portion defined by each upper end portion and each lower end portion of the plurality of annular reinforcing portions,
The plastic bottle according to claim 1 or 2 , wherein the number of the plurality of annular reinforcing portions is 3 or more and 6 or less. In the body part, in a region where the plurality of annular reinforcing parts are not formed, at least one of a recessed part that retreats to the bottle inner side and a protruding part that protrudes to the bottle outer side is provided. 5. The plastic bottle according to any one of 4 .

Images