JP3951098B2 - container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container that can be easily crushed and reduced in volume at the time of disposal.
[0002]
[Prior art]
A plastic container that can be easily crushed after use and reduced in volume has been proposed (for example, Japanese Utility Model Laid-Open No. 7-37909).
[0003]
This is configured by forming longitudinal grooves on opposite side surfaces of a rectangular tubular body. However, the vertical groove is formed on the outer surface of each side surface. Therefore, in the case of disposal, the corner portion of the body portion can be bent outward, and the entire side can be folded down while pushing the opposite side surfaces inward through the longitudinal groove, so that the entire volume can be reduced to reduce the volume.
[0004]
[Problems to be solved by the invention]
When such a conventional technique is used, the container has folding vertical grooves formed on the outer surface of each side surface, so that the outer surface of the body portion does not become a smooth surface, and can be printed beautifully or with a label or the like on the outer surface. There was a problem that it was difficult to paste beautifully.
[0005]
Therefore, in view of the problems of the prior art, the object of the present invention is to form an axial folding line on the inner surface of the body portion, thereby making the outer surface a smooth surface, and there is no problem in printing processing, label pasting processing, etc. Furthermore, it is to provide a container that can be easily crushed and reduced in volume.
[0006]
[Means for Solving the Problems]
In order to achieve this object, the structure of the present invention is such that a cylindrical parison having a groove on the inner surface is used to integrally form the body portion together with the bottom portion by direct blow molding, and at least a pair of shafts are formed on the inner surface of the body portion. A fold line in the direction is formed symmetrically for each pair up to the middle of the mouth at the upper end, and a fold line in the radial direction corresponding to each pair of fold lines in the body is formed on the inner surface of the bottom part. The body and bottom fold curves are continuous in series through the peripheral edge and center of the bottom as linear thin-walled portions corresponding to the grooves, and the body is directed outward through the fold curves of the body. The gist is to reduce the volume by folding it so that it overlaps the convex.
[0007]
In addition, you may form a recessed part in the radial direction which ties each pair of folding lines of a trunk | drum in the outer edge part of a bottom part.
[0010]
[Action]
According to the configuration of the present invention, at least a pair of axial folding lines are formed symmetrically on the inner surface of the body portion. Therefore, the outer surface of the body portion is a smooth surface, and there is no particular obstacle to the printing processing of the outer surface and the label sticking processing. Further, by applying an external force in a direction perpendicular to an imaginary plane including an axially symmetric folding curve, the body portion can be easily folded so as to be projected outwardly via the folding curve. However, the term “axisymmetric” as used herein includes not only the case where the virtual plane including each pair of folding lines includes the axis of the trunk part, but also the case where the virtual plane is slightly separated from the axis of the trunk part. The case where the distance from the folding line to the axis of the trunk is not the same is included. When the virtual plane is separated from the axis of the trunk, the distance between the two is set to a minimum allowable value in consideration of the thickness and strength of the trunk.
[0011]
The container is integrally formed of a plastic material such as polypropylene, polyethylene, or polyethylene terephthalate. In addition, the folding line is formed as a linear thin part on the inner surface of the body part. Therefore, the amount of the contents of the container can be visually observed from outside through such a folding line, or the position of the folding line can be determined. It is very easy to specify from the outside.
[0012]
In addition, the folding line formed on the inner surface of the bottom part can be folded into an inward fold through the folding line. In addition, the bottom part can be folded at a stretch by using an external force when the body part is crushed by continuing the folding line of each pair of body parts. However, the folding line at the bottom may correspond to the folding line at the trunk, and does not necessarily have to be continuous with the folding line at the trunk.
[0013]
If the concave portion is formed in the outer edge portion of the bottom portion, the concave portion becomes an opportunity when the bottom portion is folded inwardly, and the bottom portion can be easily folded.
[0014]
The bottom part and the body part are integrally formed by direct blow molding, and the entire shape including the respective folding lines can be realized very easily.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
The container 10 is formed by integrally molding the body portion 12 together with the bottom portion 11 (FIGS. 1 and 2). The container 10 is made of plastic and has a bottom part 11, a body part 12, and a mouth part 13. However, FIGS. 2A and 2B are enlarged sectional explanatory views corresponding to the arrows XX and YY in FIG. 1, respectively.
[0017]
The trunk portion 12 is formed, for example, in a cylindrical shape, and a shoulder portion 12a that smoothly connects to the small-diameter mouth portion 13 is formed in the upper portion. A pair of folding lines S and S are formed on the inner surface of the body part 12 so as to be axially symmetric in the direction of the axis C from the lower end of the body part 12 to the middle of the mouth part 13 at the upper end. Each folding line S is formed in a shallow groove shape through substantially straight slopes S1 and S1 (FIG. 2A), and is formed as a linear thin portion with respect to the body portion 12.
[0018]
The bottom portion 11 bulges slightly upward and is formed so that the thickness gradually increases from the peripheral portion to the center portion (FIGS. 2B and 3). A fold line Sa in the radial direction is formed on the inner surface of the bottom part 11 so as to connect the lower ends of the fold lines S and S of the body part 12, and the fold lines S, Sa and S are the peripheral part of the bottom part 11, It is continuous in series through the center. The folding line Sa is formed in a shallow groove shape whose depth gradually increases in accordance with the thickness of the bottom part 11 from the peripheral part of the bottom part 11 to the center part via the slightly upward curved surfaces Sa1 and Sa1. 11 is formed as a linear thin-walled portion.
[0019]
The container 10 uses a cylindrical parison P having a pair of grooves Pa and Pa on its inner surface (FIG. 4), and is integrally formed by direct blow molding. That is, the container 10 can be manufactured in one stroke into a predetermined shape having the folding lines S, Sa, S corresponding to the grooves Pa, Pa by blow-molding the parison P in a cavity of a mold (not shown). Two-dot chain line).
[0020]
Since the container 10 has a smooth outer surface of the body portion 12, the outer surface of the body portion 12 can be printed beautifully or a label (not shown) can be uniformly applied to the outer surface of the body portion 12. Further, the container 10 applies an external force F, F to the outer surface of the body portion 12 from a direction perpendicular to a virtual plane including the folding lines S, S, and another external force Fa to the outer surface of the bottom portion 11 (FIG. 5). (A)) Folding the bottom portion 11 inwardly through the folding line Sa and folding the body portion 12 outwardly through the folding lines S, S (FIG. 2 ( A) and (B), which are two-dot chain lines), the whole can be thinly crushed and reduced in volume mechanically (FIG. 5B). In addition, if the rigidity of the bottom part 11 is not large, the container 10 can also fold the bottom part 11 simultaneously only by applying external force F and F to the outer surface of the trunk | drum 12 near the bottom part 11. FIG.
[0021]
In the above description, the sectional shapes of the folding lines S and Sa shown in FIG. 2 are merely examples. For example, the former is formed through the curved surfaces Sa1 and Sa1 as shown in FIG. You may form via slope S1, S1 like a figure (A).
[0022]
[Other embodiments]
The container 10 may form a plurality of pairs of folding lines S, S... On the inner surface of the body 12 (FIG. 6). However, in FIG. 6, the position of each folding line S is indicated by an arrow S. The folding lines S, S... May be arranged at equal pitches on the inner surface of the body portion 12 (the same figure), or may be formed at unequal pitches. In any case, each pair of folding lines S and S is arranged symmetrically.
[0023]
The container 10 may form the trunk | drum 12 in deformation | transformation cross sections other than a cylindrical shape (FIG. 7). However, the position of each folding line S is indicated by an arrow S in FIG. For example, the container 10 has folding lines S and S arranged axially symmetrically in the major axis direction of the trunk section 12 having an elliptical cross section (FIG. 5A), and by applying external forces F and F in the minor axis direction, 12 can be easily crushed (two-dot chain line in the figure). Further, the container 10 forms fold curves S, S... At each top portion of the body portion 12 having a substantially triangular cross section and one side between the top portions (FIG. 5B), and the sides that form the fold curve S. While applying the external force Fb to the inner side and folding the same side inward, the external force F and F can be applied to the other two sides to thin the body 12 (two-dot chain line in the figure).
[0024]
Concave portions 11a and 11a may be formed on the outer surface of the bottom portion 11 (FIG. 8). However, FIGS. 8B and 8C are an enlarged cross-sectional explanatory view corresponding to the line AA in FIG. 8A and an enlarged cross-sectional view corresponding to the line BB, respectively. Each concave portion 11 a is formed in a shallow V-groove shape in the radial direction connecting the folding lines S, S of the body portion 12 at the outer edge portion of the bottom portion 11. The bottom 11 can be easily folded inwardly through the recesses 11a and 11a by applying external forces F and F in a direction perpendicular to the imaginary plane including the folding lines S and S of the trunk 12. (The two-dot chain line in FIG. 2B).
[0025]
In FIG. 8, a folding line Sa in the radial direction that is continuous with the folding lines S and S of the body part 12 may be formed on the inner surface of the bottom part 11. The folding line Sa at this time is formed at the same position in the same direction as the recesses 11a and 11a. Further, the recesses 11a and 11a may be continuous in the radial direction so as to cross the bottom 11, and instead of the V-groove shape, a shallow square groove shape (FIG. 9A) or an arc groove shape (FIG. )) Or any other shape. However, each two-dot chain line in FIGS. 9A and 9B shows a state in which the bottom 11 is folded inward via the recess 11a.
[0026]
In the above description, the folding line Sa of the bottom part 11 can correspond to at least one pair of the folding lines S, S... Of the body part 12, and corresponds to the folding lines S, S of the body part 12. For example, the folding lines S and S do not necessarily have to be continuous. Further, the container 10 may be formed so as to have a taper-like cross-sectional area with the body portion 12 facing the bottom portion 11 or the mouth portion 13, or may be formed in an inverted cone shape or an inverted pyramid shape without the bottom portion 11.
[0027]
【The invention's effect】
As described above, according to the present invention, by forming at least a pair of axial folding lines on the inner surface of the body portion, the outer surface of the body portion becomes a smooth surface. There is no problem in the pasting process or the like, and there is an excellent effect that it can be folded and folded easily through a folding line so that it can be easily crushed and reduced in volume.
[Brief description of the drawings]
1 is a schematic diagram of the overall configuration. FIG. 2 is an enlarged cross-sectional explanatory view of the main part of FIG. 1. FIG. 3 is an enlarged cross-sectional view corresponding to the ZZ line of FIG. Usage state explanatory diagram [FIG. 6] Schematic explanatory diagram of the main part showing another embodiment (1)
FIG. 7 is a schematic explanatory diagram of a main part showing another embodiment (2).
FIG. 8 is a main part configuration explanatory view showing another embodiment. FIG. 9 is a main part enlarged sectional explanatory view showing another embodiment.
C ... Axis S, Sa ... Folding curve 10 ... Container 11 ... Bottom 11a ... Concave 12 ... Trunk

Claims (2)

Using a cylindrical parison with a groove on the inner surface, the body part is integrally formed with the bottom part by direct blow molding , and at least a pair of axial folding lines are formed in the middle of the upper end mouth part on the inner surface of the body part and forming axially symmetrically for each pair to the inner surface of the bottom portion is constituted by forming a radial folding lines corresponding to the folding lines of each pair of said barrel, said body portion, bending line of the bottom Are continuously connected as a linear thin-walled portion corresponding to the groove via the peripheral portion and the center portion of the bottom portion, and the body portion is projected outwardly through the folding line of the body portion. A container characterized in that it is folded to reduce the volume. Wherein the outer edge of the bottom, the container of claim 1 Symbol placing and forming a recess in the radial direction connecting the folding lines of each pair of said barrel.

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