JP2009057049A - Bottle container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bottle container capable of preventing a container body from generating depression on the shoulder and the bottom part even when the amount of use of a raw material is reduced and the container is thinned down. <P>SOLUTION: The container body 2 has the bottom part 3, a barrel part 4 standing cylindrically from the outer periphery of the bottom part 3, the shoulder part 5 whose diameter is gradually reduced upward from the upper end of the barrel part 4, and a mouth neck part stood cylindrically from the upper end of the shoulder part 5. When the container body 2 is seen from the upper face side, the shoulder part 5 is positioned at the inside of a contour line S of the container body 2, and in addition, a line segment M providing the maximum diameter of the shoulder part 5 has an angle of twist θ to a line segment L1 providing the maximum diameter of the bottom part 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an improvement of a bottle container.

  Plastic bottles are used as bottle containers for storing liquid products such as shampoos, rinses, body soaps, kitchen detergents, liquid clothing detergents, softeners, etc. Widely used in products.

  The plastic bottle is generally made of a synthetic resin material formed into a bottle shape by blow molding (blow molded product). Specifically, for manufacturing the plastic bottle, a method is used in which a molten cylindrical molding material called a parison is placed in a mold and blown into the interior to be inflated and simultaneously cooled and molded.

  However, in the case of this manufacturing method, since the resin becomes thin where the cross-sectional area of the plastic bottle is large, there is a tendency to reduce the strength by reducing the thickness particularly at the shoulder and bottom of the container body, and there is a dent in these shoulder and bottom. The problem that it becomes easy to occur will occur.

For example, in the conventional plastic bottle 100 shown in FIG. 7, (a) shows the appearance, (b) shows a state in which a plurality of plastic bottles 100 are aligned in a box not shown, and (c ) Shows a state in which a plurality of plastic bottles 100 are impacted by dropping, and (d) shows a state after the plurality of plastic bottles 100 are impacted.
As shown in FIG. 7, when a plurality of plastic bottles 100 aligned in a box such as cardboard are dropped during transportation, the shoulder 100a and the bottom 100b of the adjacent plastic bottles 100 collide with each other due to the impact of the drop. In this case, a recess 101 is formed in the shoulder 100a and the bottom 100b of the plastic bottle 100, and the recess 101 remains on the shoulder 100a and the bottom 100b without being restored. Such a dent 101 not only deteriorates the appearance (appearance) of the product, but also reduces the consumer's willingness to purchase.

  On the other hand, as a measure for resource saving and rationalization for environmental measures, studies have been made to reduce the amount of resin used in plastic bottles and to make plastic bottles thinner. However, simply reducing the amount of resin used is insufficient to solve the above-described problem of dents. Therefore, urgent measures are required to solve such problems.

In addition, as a well-known document relevant to this invention, there exist the following patent documents 1-3, for example.
Among these, Patent Document 1 includes a lower body portion and an upper portion having a discharge opening at an upper end portion, and the lower body portion has a gripping means, and the gripping means is below the upper portion. Consisting of at least two spaced-apart depressions, each depression having the same shape, one edge of each depression essentially having a side profile of the barrel, and the number of each depression The two edges have a contour that is displaced so as to follow the contour of the barrel, so that the bottle can be firmly gripped, and even if the bottle is gripped from the front or rear, the same grip A bottle that can be held firmly with a feeling is described.

  On the other hand, Patent Document 2 has an elongated hollow body including an upper part, a lower part, and an annular groove disposed between the upper part and the lower part, and the annular groove extends from the side surface to the side surface. A bottle having a plurality of ribs is described.

  On the other hand, Patent Document 3 discloses a bottle having a mouth and a shoulder, a trunk and a bottom, and a plurality of rows of bi-fold panels arranged in the circumferential direction. A volume-reducible plastic bottle with a helical bellows-like body wall is provided.

However, none of Patent Documents 1 to 3 discloses or suggests solving the above-described problems, that is, preventing the occurrence of dents when the amount of resin used in a plastic bottle is reduced. Absent. Therefore, the inventions described in Patent Documents 1 to 3 are for solving a problem that is completely different from the present invention, and merely disclose a technique different from the present invention.
JP-A-7-89523 Registered Utility Model No. 3060045 JP 2002-193231 A

  The present invention has been proposed in view of such conventional circumstances, and even when the amount of raw material used is reduced and the container is thinned, a dent is generated in the shoulder or bottom of the container body. It aims at providing the bottle container which can prevent.

  In order to achieve this object, the invention according to claim 1 includes a bottom portion, a trunk portion that rises in a cylindrical shape from the outer periphery of the bottom portion, a shoulder portion that is gradually reduced in diameter upward from the upper end of the trunk portion, A container body having a mouth-and-neck portion standing in a cylindrical shape from the upper end of the shoulder portion, and when the container body is viewed from the upper surface side, the shoulder portion is located inside the contour line of the container body, and the bottom portion The bottle segment is characterized in that the line segment that gives the maximum diameter of the shoulder has a twist angle with respect to the line segment that gives the maximum diameter.

  The invention according to claim 2 is the bottle container according to claim 1, wherein the twist angle is in the range of 5 to 30 °.

  The invention according to claim 3 is the bottle container according to claim 1 or 2, wherein the outline of the container body coincides with the outline of the bottom.

  The invention according to claim 4 is characterized in that, when the container main body is viewed from the upper surface side, the end point of the line segment that gives the maximum diameter of the shoulder portion is located on the contour line. A bottle container according to claim 1.

  In the invention according to claim 5, the container body has a butt surface in which a part of the outer periphery of the bottom portion is flattened, and when the bottle containers are aligned, the butt surfaces of adjacent bottle containers butt each other. It is put together, It is a bottle container as described in any one of Claims 1-4 characterized by the above-mentioned.

  In the invention according to claim 6, the abutting surface is provided at a position parallel to the line segment for giving the maximum diameter and the line diameter for giving the minimum diameter when the container main body is viewed from the upper surface side. It is a bottle container of Claim 5 characterized by the above-mentioned.

  As described above, according to the present invention, even when the amount of raw material used is reduced and the bottle container is thinned, it is possible to prevent the container body from being dented in the shoulder and bottom. Furthermore, it is possible to make it easy to restore the dent.

Hereinafter, a bottle container to which the present invention is applied will be described in detail with reference to the drawings.
The bottle container to which the present invention is applied is, for example, a plastic bottle 1 as shown in FIGS.
This plastic bottle 1 is made of, for example, a synthetic resin material such as polyethylene resin, polypropylene resin, or polyester resin formed into a bottle shape (blow molded product) by general blow molding or stretch blow molding. For example, in the production of the plastic bottle 1, as in direct blow molding, which is a general blow molding, a molten cylindrical molding material called a parison is placed in a mold, and air is blown into the interior to inflate it. A method of cooling and molding at the same time is used.

  Specifically, as shown in FIGS. 1 to 5, the plastic bottle 1 includes a container main body 2, and the container main body 2 includes a bottom portion 3, a trunk portion 4 that rises in a cylindrical shape from the outer periphery of the bottom portion 3, and The shoulder portion 5 is gradually reduced in diameter upward from the upper end of the body portion 4, and the mouth and neck portion 6 is erected in a cylindrical shape from the upper end of the shoulder portion 5.

  Among these, as shown in FIG. 5, the bottom part 3 has a schematic shape which becomes an ellipse when the container main body 2 is viewed from the bottom surface side. Further, as shown in FIG. 4, the contour line of the bottom portion 3 coincides with the contour line S of the container body 2 when the container body 2 is viewed from the upper surface side. That is, the outer shape of the bottom 3 forms the outermost shape of the container body 2.

  Moreover, as shown in FIGS. 1-5, the bottom part 3 is provided with the butt | matching surfaces 3a and 3b which planarized a part of the outer periphery. Among these, a pair of butting surfaces 3a are provided in parallel at a position parallel to the line segment L1 that gives the maximum diameter of the bottom 3. On the other hand, a pair of butting surfaces 3b are provided in parallel at a position parallel to the line segment L2 that gives the minimum diameter of the bottom 3.

  The trunk | drum 4 comprises the outer periphery of the container main body 2 from the bottom part 3 to the shoulder part 5, as shown in FIG. As shown in FIG. 2, the outer shape of the body portion 4 has a shape that reaches the shoulder portion 5 with the same diameter from the bottom portion 3 when the container body 2 is viewed from the front side, as shown in FIG. 3. Further, when the container body 2 is viewed from the side, the diameter is slightly reduced upward from the bottom 3, and the shape extending from the reduced diameter portion to the shoulder 5 remains substantially the same diameter. . Therefore, the trunk | drum 4 is located inside the outline S of the container main body 2, when the container main body 2 is seen from the upper surface side, as shown in FIG.

  The shoulder part 5 comprises the outer periphery of the container main body 2 from the trunk | drum 4 to the mouth neck part 6, as shown in FIGS. As shown in FIG. 4, the shoulder 5 is located on the inner side of the contour line S of the container main body 2 when the container main body 2 is viewed from the upper surface side, and gives a maximum diameter of the bottom 3. The line segment M giving the maximum diameter of the shoulder portion 5 with respect to the minute L1 has a twist angle θ. That is, the container body 2 has a shape in which the body 4 is slightly twisted around the vertical axis between the bottom 3 and the shoulder 5. Further, the end points m 1 and m 2 of the line segment M giving the maximum diameter of the shoulder 5 are located on the contour line S of the container body 2.

  The mouth / neck portion 6 has a cylindrical shape in the upper center of the container body 2. A screw portion (not shown) is formed on the outer peripheral surface of the mouth / neck portion 6. A cap 7 can be detachably attached to the neck 6 by screwing.

  In the plastic bottle 1 having the above-described structure, as shown in FIG. 6, the plastic bottle 1 is placed in a box (not shown) such as a cardboard box in the vertical direction (direction parallel to the line segment L1) and the horizontal. When aligned in the direction (the direction parallel to the line segment L2), the shoulder portions 5 of the adjacent plastic bottles 1 are displaced in the opposite directions. In this case, since the shoulder portions 5 of the adjacent plastic bottles 1 do not directly collide with each other due to a drop impact or the like, it is possible to prevent the dents in the shoulder portions 5 from being generated.

  In order to prevent the occurrence of a dent in the shoulder portion 5, the twist angle θ of the line segment M that gives the maximum diameter of the shoulder portion 5 with respect to the line segment L1 that gives the maximum diameter of the bottom portion 3 is in the range of 5 to 30 °. Is preferred. If it is this range, it can be set as the shape which a dent easily restores, suppressing generating a dent in the shoulder part 5 when an impact etc. are added. On the other hand, when the twist angle θ is less than 5 °, such an effect cannot be sufficiently obtained. When the twist angle θ exceeds 30 °, the display label is not displayed when the plastic bottle 1 is viewed from the front. This makes it difficult for consumers to purchase at the store.

  Moreover, in this plastic bottle 1, since the outline S of the container main body 2 coincides with the outline of the bottom 3, the plastic bottle 1 is placed in the vertical direction (direction parallel to the line segment L1) and the horizontal direction (line segment). In the direction parallel to L2), the bottoms 3 of the adjacent plastic bottles 1 are adjacent to each other. Further, at the bottom 3 of the adjacent plastic bottle 1, the butting surfaces 3a and 3b are butted against each other. Thereby, it is possible to prevent the bottom 3 of the container body 2 from being depressed when an impact or the like is applied while suppressing the occurrence of rattling of the plastic bottles 1 arranged in the box.

  As described above, according to the plastic bottle 1, even when the amount of raw material used is reduced and the container body 2 is thinned, the container body 2 has a dent in the shoulder portion 5 and the bottom portion 3. In addition, it is possible to make the shape easy to restore the dent.

  The bottle container to which the present invention is applied is not necessarily limited to the configuration of the plastic bottle 1 described above, and various modifications can be made without departing from the spirit of the present invention. For example, in the plastic bottle 1, instead of the cap 7, a cap provided with a discharge port for discharging the contents accommodated in the container body, or a cap provided with an overcap that covers the cap is mounted. The shape of the cap is not particularly limited. The plastic bottle 1 may be a container with a measuring cap that uses a cap as a measuring cup, or a container with a pump in which a pump dispenser is attached to the container body 2 via the cap.

  Moreover, the plastic bottle 1 can be widely used as a bottle container for storing liquid products for daily goods, beverages, foods, and the like. And liquid products such as rinses, body soaps, kitchen detergents, liquid clothing detergents and softeners. Moreover, as a content, not only the liquid product mentioned above but powder products etc. can also be accommodated.

  Hereinafter, the effects of the present invention will be made clearer by examples. In addition, this invention is not limited to a following example, In the range which does not change the summary, it can change suitably and can implement.

  In this embodiment, plastic bottles having a twist angle θ of 4 °, 8 °, 12 °, 17 ° and a plastic bottle having a conventional twist angle θ of 0 ° are actually manufactured. A test in which plastic bottles arranged in corrugated cardboard were dropped from a height of 20 cm was conducted to examine the occurrence of dents. The measurement results are shown in Table 1. Each plastic bottle has a resin amount of 21.5 g, a height of 19 cm, and a capacity of 0.4 L.

  As shown in Table 1, in the conventional plastic bottle in which the twist angle θ of Comparative Example 1 is 0 °, dents are observed in the bottom and shoulders, and such dents are not restored and the shoulders and bottoms are not restored. The result (×) remaining in FIG. On the other hand, in the plastic bottle in which the twist angle θ of Experimental Example 2 is 8 °, there was almost no dent and a good result (◎) was shown. In addition, in the plastic bottles with the twist angles θ of 4 °, 12 °, and 17 ° in Examples 1, 3, and 4, the results (◯) within the limit were shown although some dents were observed.

FIG. 1 is a perspective view showing an appearance of a plastic bottle to which the present invention is applied. FIG. 2 is a front view of the plastic bottle shown in FIG. FIG. 3 is a side view of the plastic bottle shown in FIG. 4 is a top view of the plastic bottle shown in FIG. FIG. 5 is a bottom view of the plastic bottle shown in FIG. FIG. 6 is a plan view of the state in which the plastic bottles shown in FIG. FIG. 7 is a perspective view for explaining generation of a dent in a conventional plastic bottle.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Plastic bottle (bottle container) 2 ... Container main body 3 ... Bottom part 3a, 3b ... Butting surface 4 ... Torso part 5 ... Shoulder part 6 ... Mouth and neck part 7 ... Cap

Claims (6)

A bottom portion, a trunk portion that rises in a cylindrical shape from the outer periphery of the bottom portion, a shoulder portion that is gradually reduced in diameter upward from the upper end of the trunk portion, and a mouth and neck portion that rises in a cylindrical shape from the upper end of the shoulder portion A container body having
When the container body is viewed from the upper surface side, the shoulder portion is located inside the contour line of the container body, and the maximum diameter of the shoulder portion is set with respect to a line segment that gives the maximum diameter of the bottom portion. A bottle container characterized in that a given line segment has a twist angle.   The bottle container according to claim 1, wherein the twist angle is in the range of 5 to 30 °.   The bottle container according to claim 1 or 2, wherein a contour line of the container main body coincides with a contour line of the bottom portion.   The end point of the line segment that gives the maximum diameter of the shoulder when the container main body is viewed from the upper surface side is located on the contour line of the container main body. The bottle container described.   The container body has a butting surface obtained by flattening a part of the outer periphery of the bottom, and when the bottle containers are aligned, the butting surfaces of adjacent bottle containers are butted together. Item 5. The bottle container according to any one of Items 1 to 4.   The abutting surface is provided at a position parallel to a line segment that gives a maximum diameter and a line diameter that gives a minimum diameter when the container main body is viewed from the upper surface side, respectively. Item 6. The bottle container according to Item 5.

Images