JP5655428B2 - Plastic container - Google Patents

Description

  The present invention relates to a synthetic resin container in which a belt-like wound label is mounted on a container body.

  Conventionally, a synthetic resin container formed by forming a preform using a synthetic resin such as polyethylene terephthalate and then molding the preform into a bottle shape by stretch blow molding or the like contains various beverage products. Known as a beverage container.

  In addition, this type of container is filled and sealed with the contents, and various labels for displaying the contents are attached to the market, and one of such labels is cut into a strip shape. A so-called wound label is known, in which the attached label is wound around the body of the container (see Patent Document 1). In order to attach such a wound label to the container, for example, the wound label with the adhesive applied to the start end side and the end end side is sucked and held on the suction drum, and the container is conveyed while rotating. Press and adhere the starting end of the wound label to the surface and wind it along the circumferential direction of the container while winding it from the suction drum by rotating the container. It can be mounted by pressing and bonding (see Patent Documents 2 and 3).

JP 2005-22662 A JP 2002-104349 A JP 2008-37439 A

  By the way, unlike stretch labels and shrink labels that themselves expand and contract to follow the shape of the container, most of the wound labels are wound around the container without expansion and contraction. For this reason, when it winds around a container, there is a concern that wrinkles may occur on the wound label.

  For example, in this type of container, in order to increase the rigidity of the container, as shown in FIG. 1 of Patent Document 1, a waist portion formed in a groove shape is provided over the entire circumference of the trunk portion. It is known. Then, when winding the wound label along the circumferential direction of the container body portion provided with such a waist portion, when the tension in the winding direction becomes strong, the label bites into the groove forming the waist portion. In such a case, there has been a problem that an appearance defect such as wrinkles may occur due to the fact that the end of winding of the label is lifted.

  The present invention has been made in view of the circumstances as described above, and when the wound label is wound along the circumferential direction of the container body portion in which the groove-shaped waist portion is formed, the wound label is wrinkled. An object of the present invention is to provide a synthetic resin container capable of suppressing appearance defects such as stagnation.

The synthetic resin container according to the present invention includes a mouth, a shoulder, a trunk, and a bottom, and is a rectangular bottle-shaped container having a rectangular cross section perpendicular to the height direction of the trunk, A synthetic resin container to which a belt-like wound label is mounted across a waist formed in a groove shape over the entire circumference of the trunk, so that the waist is located on each side of the trunk A main groove portion formed intermittently at a predetermined interval along the circumferential direction, and a corner portion of the body portion where the main groove portion is interrupted, an upper side in the height direction and a lower side in the height direction with respect to the main groove portion And a sub-groove portion that is narrower than the main groove portion, and an inclined groove portion that branches from the main groove portion and is connected to each of the sub-groove portions that are positioned above and below .

  According to the present invention, even if a belt-like wound label is attached across the waist part along the circumferential direction of the container body part in which the groove-like waist part is formed, the wound label wound around the body part is wrinkled. Can be prevented from occurring.

It is a front view showing an outline of an embodiment of a synthetic resin container according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view schematically showing a synthetic resin container according to the present embodiment.

  In the present embodiment, the container 1 is illustrated by, for example, biaxially stretching blow-molding a bottomed cylindrical preform made of a thermoplastic resin manufactured by known injection molding or compression molding. It is formed into a predetermined container shape having a mouth portion 2, a shoulder portion 3, a body portion 4, and a bottom portion 5.

  As the thermoplastic resin used to mold the container 1, any resin can be used as long as stretch blow molding is possible. Specifically, thermoplastic polyesters such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, polylactic acid or copolymers thereof, those blended with these resins or other resins are suitable. It is. In particular, an ethylene terephthalate thermoplastic polyester such as polyethylene terephthalate is preferably used. Further, acrylonitrile resin, polypropylene, propylene-ethylene copolymer, polyethylene and the like can be used.

  In the illustrated example, the mouth portion 2 is formed in a cylindrical shape, and a screw thread for attaching a lid body (not shown) is provided on the side surface on the opening end side of the mouth portion 2 as lid body attaching means. Yes. Thereby, after filling the contents, the inside of the container 1 can be sealed by attaching the lid to the mouth portion 2.

The shoulder portion 3 is located between the mouth portion 2 and the trunk portion 4 and is formed so as to continue to the trunk portion 4 while expanding the diameter from directly below the mouth portion 2. Although the trunk | drum 4 is a part which occupies most of the height direction of the container 1, it does not show in particular in figure, The cross section orthogonal to a height direction is made into the square which rounded the corner | angular part. Thereby, the container 1 is made into the square bottle-shaped container shape.
In the present invention, the height direction means a direction along a direction perpendicular to the horizontal plane when the container 1 is placed on the horizontal plane with the mouth portion 2 facing up.

In addition, a waist portion 40 is formed in a groove shape over the entire circumference of the body portion 4 in order to increase the rigidity of the container 1 in the vicinity of the center of the body portion 4 in the height direction.
In the example shown in FIG. 1, the waist portion 40 includes a main groove portion 40 a that is intermittently formed at predetermined intervals along the circumferential direction so as to be located on each side surface of the body portion 4, and a trunk in which the main groove portion 40 a is interrupted. At each corner of the portion 4, the sub-groove portion 40 b that is narrower than the main groove portion 40 a, which is formed on the upper side in the height direction and the lower side in the height direction with respect to the main groove portion 40 a, is branched from the main groove portion 40 a. In addition, there are inclined groove portions 40 c connected to the respective sub groove portions 40 b located above and below, and these are formed so as to be continuous over the entire circumference of the body portion 4.

  In the present embodiment, a winding label for displaying the contents to be filled and sealed in the container 1 is cut and arranged in a band shape on the trunk portion 4 in which such a waist portion 40 is formed, and straddles the waist portion 40. It is installed with. A range in which the wound label is attached is indicated by a symbol L in FIG. 1, and the side surface of the body portion 4 can be appropriately provided with uneven shapes such as a reduced pressure absorption panel and a reinforcing rib as needed.

Here, the waist portion 40 can be formed with the same width over the entire circumference, but in the present embodiment, the width Wb of the sub-groove portion 40b is made smaller than the width Wa of the main groove portion 40a. At this time, the width Wb of the sub-groove portion 40b is appropriately adjusted so that the wound label is less likely to bite into the sub-groove portion 40b when the wound label is wound around the body portion 4. Specifically, the width Wb of the sub-groove portion 40b is preferably about 3 to 6 mm.
On the other hand, the width Wa of the main groove portion 40a is to secure a width necessary to ensure the rigidity of the container 1, and specifically, is preferably about 7 to 15 mm.

  By doing so, when the contents are filled and sealed and the wound label is attached to the body portion 4, the wound label bites into the groove forming the waist portion 40 without impairing the rigidity of the container 1. It is possible to prevent wrinkles from occurring on the wound label wound around the body 4.

  That is, if the waist portion 40 is formed in a straight line along the circumferential direction, the wound label is likely to bite into the groove forming the waist portion 40, but the main groove portion 40 a forming the waist portion 40 and the sub-groove are formed. It is possible to alleviate the encroachment of the wound label by making the groove part 40b stepped and mixing the part where the groove part is formed and the part where the groove part is not formed on the same plane orthogonal to the height direction. it can.

  In particular, in the case of the container 1 having a rectangular bottle-like container shape as in the present embodiment, the tension is increased when the wound label is wound around the corner portion of the trunk portion 4, and the wound label is wound around the groove portion located at the corner portion. There is a tendency for the label to be easy to bite. On the other hand, in the present embodiment, the sub-groove portion 40b is positioned at the corner of the body portion 4, and the winding label is narrower than the main groove portion 40a so that the winding label does not easily bite into the sub-groove portion 40b. Can be avoided more effectively.

  Further, if the waist part 40 is not formed over the entire circumference and the groove part is eliminated only at the corners of the body part 4, the rigidity of the container 1 becomes weak, and the container 1 is attached when the winding label is attached. May be deformed. In such a case, it is difficult to wind the wound label itself. However, in the present embodiment, the waist portion 40 is formed over the entire circumference of the body portion 4, so that such a problem is caused. Nor.

  Although the present invention has been described with reference to the preferred embodiment, it is needless to say that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. .

  The synthetic resin container according to the present invention as described above can be applied to various synthetic resin containers to which a wound label is attached.

DESCRIPTION OF SYMBOLS 1 Container 2 Mouth part 3 Shoulder part 4 Trunk part 40 Waist part 40a Main groove part 40b Subgroove part 40c Inclined groove part 5 Bottom part

Claims (1)

It has a mouth portion, a shoulder portion, a trunk portion, and a bottom portion, and is formed into a square bottle-like container shape having a rectangular cross section perpendicular to the height direction of the trunk portion, and in a groove shape over the entire circumference of the trunk portion. A synthetic resin container on which a belt-like wound label is mounted across the formed waist part,
The waist is
A main groove formed intermittently at a predetermined interval along the circumferential direction so as to be located on each side surface of the body part ;
In each corner of the trunk portion where the main groove portion is interrupted, a sub-groove portion that is narrower than the main groove portion formed stepwise on both the upper side in the height direction and the lower side in the height direction with respect to the main groove portion, ,
A synthetic resin container comprising an inclined groove portion branched from the main groove portion and connected to each of the sub groove portions positioned vertically .

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