TWI462860B - Resin container - Google Patents

Description

Resin container

The present invention relates to a resin container having a mouth portion that can be detachably attached to a lid portion, a shoulder portion that is connected to the mouth portion, a crotch portion that is connected to the shoulder portion, and a bottom portion that is connected to the crotch portion and located at the lowermost portion. .

A resin container represented by a bottle is suitable for mass production because it is easy to form. Further, since it has a certain degree of mechanical strength and is lightweight and excellent in characteristics, it is widely used as a container for filling various liquids and the like in various fields. In particular, in recent years, containers for beverages, such as tea and mineral water, which are used in large quantities, are not only sold at the store but also used in vending machines.

In recent years, awareness of environmental issues has increased, and the weight reduction of resin containers has been actively promoted. However, in order to reduce the thickness of the container in order to reduce the weight, the overall strength is lowered, and the impact and load on the flow can not be withstood, which causes a problem that the consumer is difficult to hold when drinking.

A conventional resin container invented to solve the above problems is known, for example, as disclosed in Patent Document 1. In the upper and lower sides of the crotch portion, a plurality of grooves are provided around the crotch portion to secure the strength of the resin container (see Patent Document 1).

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2009-154959

However, in the case of a conventional resin container, it is not always possible to ensure the filling strength against impact and load from the vertical direction. For example, when a beverage or the like is filled in a product of a conventional resin container and stacked in a vertical state, the load of the stacked product may cause compression deformation of the lower product.

Therefore, an object of the present invention is to provide a resin container which is less likely to cause compression deformation against impact and load from above or below the container, and is also used for weight reduction.

The first characteristic configuration of the resin container of the present invention includes a mouth portion that can be detachably attached to the lid portion, a shoulder portion that is connected to the mouth portion, a crotch portion that is connected to the shoulder portion, and a crotch portion that is connected to the crotch portion. The resin container at the bottom of the lower portion is provided with a buffer portion that is elastically deformable in the vertical direction in which the groove having the outermost width in the radial direction is larger in the radial direction than the center of the crotch portion in the lower direction.

(action and effect)

As shown in the present configuration, when the buffer portion that is elastically deformable in the vertical direction is provided at the lower end portion of the crotch portion, the buffer portion is wider toward the outer side in the radial direction even when the impact or load is applied to the container from the vertical direction. The groove is elastically deformed at the center and absorbs its load, so that the compression deformation of the container can be prevented. In addition, when the resin container is filled with a beverage or the like, the resin container is elastically deformed at a position near the center of gravity or at a lower gravity center, and the shock absorber can absorb the shock more stably. Or load.

The second characteristic configuration is such that the buffer portion is located at the lower end of the crotch portion Minute.

(action and effect)

According to this configuration, since the buffer portion is located at the lower end portion of the crotch portion, not only the impact or the load can be absorbed more stably, but also the design effect of the resin container is more remarkable because it is less noticeable than when it is placed above. less.

In the third characteristic configuration, the buffer portion has a groove that covers one or more of the entire circumference, respectively, in the upper and lower sides of the groove having a larger outer width in the radial direction.

(action and effect)

According to this configuration, since the buffer portion has three or more spring structures, the load can be more reliably absorbed.

The fourth characteristic configuration is such that the depth of the groove which is larger in the outer side in the radial direction is deeper than the depth of the other grooves.

(action and effect)

According to this configuration, the shape of the buffer portion when viewed from the front is formed such that the vicinity of the groove having the larger outer diameter in the radial direction is the shape of the most reduced diameter. As a result, when a load or the like is applied from the vertical direction, the stress tends to concentrate on the groove having a larger outer width in the radial direction, and the elastic deformation can be more smoothly performed.

In the fifth aspect, the first protruding region that protrudes inward in the radial direction of the crotch portion and the second protruding region that protrudes inward in the radial direction from the first protruding region are provided, and the first protruding portion is formed by the first protruding portion. Area and front The second protruding regions are alternately arranged in the circumferential direction, and have wavy concave portions having a plurality of horizontal cross-sectional shapes having a wavy shape in the upper and lower directions of the crotch portion.

(action and effect)

As shown in the present configuration, when a plurality of wavy concave portions having a wavy circumferential shape are provided in the upper and lower directions of the crotch portion, the rib having a circular cross-sectional shape has a higher reinforcing effect. Moreover, compared with the rib having a polygonal cross-sectional shape, since there is no uneven portion, the phenomenon of stress concentration is alleviated.

Therefore, according to this configuration, even if the thickness is reduced in order to reduce the weight, the impact applied to the side surface of the container and the load sufficient strength can be ensured.

According to a sixth aspect of the invention, the plurality of wavy concave portions are arranged to be phase-shifted in the circumferential direction, and another wavy concave portion positioned directly below the first protruding portion in which one wavy concave portion is disposed is disposed. The second protruding area.

(action and effect)

As shown in the present configuration, when the plurality of corrugated concave portions are arranged in the circumferential direction with respect to each other in the phase direction, since the strength of the entire crotch portion is more uniform, the stress concentration is further alleviated.

Hereinafter, with reference to the drawings, the resin container of the present invention is good. The beverage bottle of the embodiment is described with a plastic bottle body.

Implementation form

First, the various terms of this specification are defined as follows.

In the present specification, the vertical direction refers to the direction of the central axis XX of the plastic bottle body 1 (hereinafter, simply referred to as the bottle body 1), and the upper side of the drawing is "upper", and the lower side of the drawing is "". under". The horizontal direction or the horizontal direction means a direction orthogonal to the X-X direction of the central axis. The circumferential direction refers to the direction along the contour of the cross-sectional shape. The radial direction is the radial direction of the circle when considering any point on the central axis X-X as the center of the circle. Height or width refers to the length along the central axis X-X. Depth refers to the length along the radial direction. The cross-sectional shape refers to the cross-sectional shape of the bottle 1 which is orthogonal to the plane (cross section) of the central axis X-X.

As shown in Fig. 1, the bottle body 1 of the present embodiment has a mouth portion 2 that is detachably provided with a lid portion from the top, a shoulder portion 3 that is connected to the mouth portion 2, and a shoulder portion. The crotch portion 4 of the 3, and the bottom portion 5, which is connected to the crotch portion 4 and located at the lowermost portion, form a space for storing the beverage on the inner side by the portions.

The mouth portion 2, the shoulder portion 3, the crotch portion 4, and the bottom portion 5 of the bottle body 1 are, for example, made of a thermoplastic resin such as polyethylene, polypropylene or polyethylene terephthalate, and the second is used. The extension molding method such as shaft extension blow molding is integrally formed.

The bottle body 1 is washed after forming. Sterilize and refill the beverage. Filled drinks, such as mineral water, green tea, oolong tea, or juice Carbonated drinks, however, may be filled with foods such as other carbonated drinks and seasonings.

(mouth)

The mouth portion 2 has an opening at the upper end and has the function of an injection port of the beverage. The opening of the mouth portion 2 is opened and closed by a detachable lid portion (not shown).

(shoulder)

The shoulder portion 3 has a cross-sectional shape in which the polyhedral portion is gradually expanded toward the lower side and the lower end is connected to the first recess portion 6 of the crotch portion 4.

(胴)

In the configuration of the crotch portion 4, the first recessed portion 6 is provided, the straight portion 7 connected to the first recessed portion 6, the second recessed portion 8 connected to the straight portion 7, and the second recessed portion 8 are connected. The crotch portion 9 and the buffer portion 10 connected to the crotch portion 9 are provided.

[1st and 2nd recesses]

The first and second recesses 6 and 8 are provided in the groove on the entire circumference of the crotch portion 4, and have an impact against the side surface of the bottle body 1 and a load for reinforcing the strength (hereinafter, simply referred to as side strength). Reinforcement ribs. Further, the widths and groove depths of the grooves of the first and second recesses 6 and 8 are constant over the entire circumference of the crotch portion 4, and the width and groove depth of the groove of the first recess portion 6 are The width and the groove depth of the groove of each of the second recesses 8 are the same.

[Direct Department]

The straight portion 7 has a cylindrical portion in which the cross-sectional shape is a circle of a perfect circle, and has a maximum outer diameter of the bottle 1. Further, on the outer peripheral surface of the straight portion 7, a label for indicating the name of the beverage or the like may be provided. The first to third wave-shaped recesses 11, 12, and 13 are provided at equal intervals in the vertical direction of the straight portion 7. The first to third wavy concave portions 11, 12, and 13 are grooves that are provided across the entire circumference of the straight stern portion 7, and have the same shape as the first and second concave portions 6 and 8 to reinforce the bottle body 1. The function of the reinforcing ribs for the side strength.

[1st to 3rd wavy recesses]

Hereinafter, the first to third wavy concave portions 11, 12, and 13 will be described. However, since all of the first undulating concave portions 11, 12 and 13 have the same configuration, only the first wavy concave portion 11 will be described, and the first embodiment will be omitted. Description of the structure of 2 and the third wavy concave portions 12 and 13.

As shown in FIG. 2, the first wavy concave portion 11 includes a first protruding region 14 that protrudes inward in the radial direction, and a second protruding region 15 that protrudes inward in the rearward direction from the first protruding region 14.

The first protruding region 14 and the second protruding region 15 are alternately arranged in the circumferential direction. In the present embodiment, the first projecting region 14 and the second projecting region 15 are provided at seven intervals in the circumferential direction at intervals of about 51 degrees.

As shown in Fig. 3, the cross-sectional shape of the groove of the second projecting region 15 is more radially inward than the position of the first projecting region 14. The shape of the mountain-like shape is protruded, and the entire cross-sectional shape of the first wavy concave portion 11 is a wavy circumferential shape of the undulation.

As shown in FIG. 1 and FIG. 2, the groove of the second projecting region 15 has a configuration in which the width of the outer groove is larger as the radial direction is provided by the two inclined surfaces 16 having two mountain-like shapes. Further, the width of the groove 17 constituting the first protruding region 14 is narrower than the width of the groove 18 constituting the second protruding region 15, as shown in Fig. 1, the groove 17 having a narrow width and a wide width are provided. The grooves 18 are formed in a wavy curve on the upper and lower sides and are alternately arranged in the circumferential direction.

As shown in Fig. 2, the first to third wavy concave portions 11, 12, and 13 are arranged in the circumferential direction with a phase shift therebetween. For example, in the arrangement position of the first protruding region 14 of the first wavy concave portion 11, the second protruding portion 15 is disposed in the lower second wave-shaped concave portion 12, and the third wave-shaped concave portion 13 is disposed in the lower portion. 1 protruding area 14. As shown in FIG. 1 and FIG. 2, in the arrangement position of the groove 17 having a narrow width of the first wavy concave portion 11, the groove 18 having a wide width is disposed in the lower second wave-shaped concave portion 12, and In the lower third wavy concave portion 13, a groove 17 having a narrow width is disposed.

[ㄑ部]

As shown in Fig. 1, the crotch portion 9 is a portion that is constructed by the consumer to easily hold the bottle body 1. The crotch portion 9, when viewed from the front, has a plate surface shape that is alternately combined into a circular arc shape such as a rhombus shape and a gourd shape, and is gradually reduced toward the center portion 19 in the upper and lower directions of the crotch portion 9.

Not shown, however, the cross-sectional shape of the crotch portion 9 has a polygonal shape. shape. The cross-sectional shape near the center position 19 of the crotch portion 9 is substantially octagonal in shape with an arc shape as a whole, and the closer to the upper and lower directions from the central position 19, the closer to the circle, and the upper and lower ends are integrally provided with an arc. Hexagonal shape.

[buffer section]

As shown in Fig. 1, the buffer portion 10 is provided with a V-shaped concave portion 20 having a V-shaped longitudinal cross-sectional shape groove having a width larger toward the outer side in the radial direction, and is provided in the V groove. The bellows portion of the two small concave portions 21, 21 of the upper and lower portions of the word recessed portion 20 has a line symmetry with the V-shaped concave portion 20 as an axis of symmetry. As shown in Fig. 4, the cross-sectional shape of the small concave portion 21 has a wavy circumferential shape of the undulation. Further, as shown in Fig. 5, the cross-sectional shape of the V-shaped convex portion 20 also has an undulating wavy circumferential shape.

The inner diameter of the deepest portion of the V-shaped recess 20 is substantially the same as the inner diameter of the central portion of the crotch portion 9 in the upper and lower directions. The groove width of the small recessed portion 21 is smaller than the width of any one of the first and second concave portions 6, 8 and the first to third wave-shaped concave portions 11, 12, 13, and the V-shaped concave portion 20. The groove depth of the small recessed portion 21 is smaller than any of the first and second concave portions 8, the first to third wave-shaped concave portions 11, 12, 13, and the V-shaped concave portion 20.

The buffer portion 10 has a V-shaped concave portion 20 and three grooves of the two small concave portions 21 and 21 to constitute a three-stage spring structure, thereby being elastically deformable in the vertical direction. Therefore, for the bottle body 1, even if a load is applied from the upper and lower directions, the buffer portion 10 can be elastically deformed to absorb the load, and the pressure of the bottle body 1 can be prevented. Forced deformation.

Further, the buffer portion 10 of the present embodiment includes three grooves of the V-shaped concave portion 20 and the two small concave portions 21 and 21 as the grooves covering the entire circumference thereof. However, the configuration is not limited to this configuration. The configuration may include a configuration in which only one or a plurality of V-shaped concave portions 20 are provided, or one or more small concave portions 21 are provided on the upper and lower sides of the V-shaped concave portion 20, or a plurality of V-shaped concave portions 20 and one or more plural portions may be provided. The configuration of the small recess 21. Further, in the present embodiment, the buffer portion 10 is provided at the lower end portion of the crotch portion 4. However, the configuration is not limited thereto, and the buffer portion 10 may be provided at the center in the lower direction of the crotch portion 4. The composition of the lower side.

(bottom)

As shown in Fig. 1, the bottom portion 5 is provided with a peripheral wall 22 and a bottom wall 23. The peripheral wall 22 is a cylindrical portion that is enlarged upward from the peripheral edge of the bottom wall 23 and stands up. As shown in Fig. 6, the bottom wall 23 has a circular circular shape and has a wheel-shaped contact portion 24 disposed on the outer peripheral edge thereof, and gradually forms a conical shape from the inner edge of the contact portion 24 toward the center of the circle of the bottom wall 23. The conical portion 25 and the circular recessed portion 26 formed in the center of the circle of the conical portion 25 and protruding upward are formed. Further, when the bottle body 1 is placed on a flat table top or the like, the contact portion 24 contacts the table top or the like.

As shown in Fig. 6, the vertical recessed portion 27 covering the groove of the peripheral wall 22 from the recessed portion 26 of the bottom wall 23 is radially provided at eight places in the circumferential direction at equal intervals from the recessed portion 26 of the bottom wall 23. Moreover, the small vertical recess 28 covering the groove of the peripheral wall 22 from the outer edge of the conical portion 25 is located in the adjacent vertical recess The manner between 27 is equally spaced at 8 places in the circumferential direction.

The vertical recessed portion 27 and the small vertical recessed portion 28 have reinforcing rib functions for reinforcing the strength of the bottom portion 5. Further, the vertical recessed portion 27 and the small vertical recessed portion 28 have the cleaning liquid guided to the bottom portion 5 by the vertical recessed portion 27 and the small vertical recessed portion 28 when the inside of the bottle body 1 is washed. The function improves the cleaning performance of the bottom 5.

[Other embodiments]

(1) The shape of each component of the bottle body 1 of the above-described embodiment is not limited to the above-described embodiment, and may be arbitrarily changed as needed within the scope of the configuration of the present invention.

(2) In the above embodiment, the first to third wavy concave portions 11, 12, and 13 are horizontally viewed when viewed from the front of the bottle body 1. However, the configuration is not limited to this configuration, and the other is as shown in Fig. 7. When the front side of the bottle body 1 is viewed, the first to third wavy concave portions 11, 12, and 13 may be provided in an inclined state.

The resin container of the present invention is not limited to non-carbonated drinks such as water, green tea, oolong tea, juice, etc., and can also be used as a container for filling foods such as carbonated drinks and seasonings.

1‧‧‧ bottle

2‧‧‧ mouth

3‧‧‧ shoulder

4‧‧‧胴

5‧‧‧ bottom

10‧‧‧ buffer

11~13‧‧‧1st to 3rd wavy recesses

14‧‧‧1st protruding area

15‧‧‧2nd prominent area

Fig. 1 is a front view of a resin container of the present invention.

Fig. 2 is a perspective view showing a straight portion of a resin container of the present invention.

Fig. 3 is a cross-sectional view taken along line III-III of Fig. 1.

Fig. 4 is a cross-sectional view taken along line IV-IV of Fig. 1.

Fig. 5 is a cross-sectional view taken along line V-V in Fig. 1.

Fig. 6 is a bottom plan view showing the bottom of the resin container of the present invention.

Figure 7 is a front elevational view of another embodiment of a straight portion.

1‧‧‧ bottle

2‧‧‧ mouth

3‧‧‧ shoulder

4‧‧‧胴

5‧‧‧ bottom

6‧‧‧1st recess

7‧‧‧Directional Department

8‧‧‧2nd recess

9‧‧‧ㄑ

10‧‧‧ buffer

11~13‧‧‧1st to 3rd wavy recesses

16‧‧‧Sloping surface

17‧‧‧ditch

18‧‧‧ditch

19‧‧‧Central location

20‧‧‧V word recess

21‧‧‧ small recess

22‧‧‧Week wall

23‧‧‧ bottom wall

27‧‧‧ vertical recess

28‧‧‧Small vertical recess

Claims (7)

A resin container is provided with a mouth portion that can be detachably attached to a lid portion, a shoulder portion that is connected to the mouth portion, a crotch portion that is connected to the shoulder portion, and a resin container that is connected to the crotch portion and is located at the bottom portion of the lowermost portion. a buffer portion that is elastically deformable in a vertical direction in which a groove having a larger outer width in the radial direction is formed on the outer circumference of the crotch portion, and the buffer portion is in the forward direction. Each of the upper and lower grooves having a larger outer width in the radial direction has another groove covering one or more of the entire circumference, and the depth of the groove having a larger outer width in the radial direction is deeper than the depth of the other grooves. The resin container according to the first aspect of the invention, wherein the groove of the buffer portion has a wavy circumferential shape. The resin container according to the first aspect of the invention, wherein the buffer portion is located at a lower end portion of the crotch portion. The resin container according to any one of claims 1 to 3, wherein the first protruding region that protrudes inward in the radial direction of the crotch portion and the inner side in the radial direction is larger than the first protruding region. The second protruding region is formed in a mountain shape, and the first protruding region and the second protruding region are alternately arranged in the circumferential direction, and the plurality of cross-sectional shapes have a wavy circumferential shape in the upper and lower directions of the crotch portion. Concave. A resin container as described in claim 4, wherein The plurality of wavy concave portions are arranged to be phase-shifted in the circumferential direction, and a second protruding region of another wavy concave portion located directly below the first protruding region in which one wavy concave portion is disposed is disposed. A resin container is provided with a mouth portion that can be detachably attached to a lid portion, a shoulder portion that is connected to the mouth portion, a crotch portion that is connected to the shoulder portion, and a resin container that is connected to the crotch portion and is located at the bottom portion of the lowermost portion. Further, the buffer portion is elastically deformable in the vertical direction of the groove having a larger outer width in the radial direction than the center of the crotch portion, and has a radial direction toward the crotch portion. a first protruding region that protrudes inward and a second protruding region that protrudes inward in the radial direction from the first protruding region, and the first protruding region and the second protruding region are alternately arranged in the circumferential direction. The crotch portion has a wavy concave portion having a wavy circumferential shape in a plurality of cross-sectional directions. The resin container according to the sixth aspect of the invention, wherein the plurality of wavy concave portions are arranged to be phase-shifted in the circumferential direction, and are disposed at a position where the first protruding region of one wavy concave portion is disposed. The second protruding region of the other wavy concave portion directly below.