JP2010173681A - Synthetic resin container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a technical problem in creating a cross section form of a folding line suitable for crushing/deforming a container with a folding line. <P>SOLUTION: This relates to a synthetic resin container whose mouth tube part is standingly provided through a shoulder part from the top end of a tubular body and whose peripheral wall is disposed with a groove rib which works as a folding line for flatly crushing and deforming. The folding line which functions as a valley deformation start point in crushing and deforming is formed by a valley groove rib whose cross section is U-shaped and the folding line which functions as a mountain fold deformation start point is formed by a mountain fold groove rib whose cross section is inverted U-shaped, i.e., the bottom of the U shape is the top of the mountain fold groove rib. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a synthetic resin container in which groove ribs forming crease lines are formed in a body portion so as to be easily crushed flat when discarded.

For example, Patent Document 1 describes a container in which a crease line is formed in the body so that it can be easily crushed flat when discarded. FIG. 5 shows a container described in Patent Document 1, in which a barrel portion that erects a mouth tube portion via a shoulder portion is formed in a rectangular tube shape at an upper end portion, on left and right side walls of the barrel portion, on a vertical center line thereof. The longitudinal groove 101 along the upper and lower sides of the longitudinal groove 101 and the oblique groove 102 extending from the lower end to the front and rear and from the lower end to the front and rear are recessed as crease lines. The cross-sectional shapes of the vertical groove 101 and the oblique groove 102 are U-shaped as shown in FIG.

JP 2003-276718 A

  Here, in the container with a crease line described in the above-mentioned Patent Document 1, for example, when a pair of vertical grooves 101 formed on opposite body walls are folded in a mountain and an attempt is made to deform the container into a flat shape, Due to a certain cross-sectional shape, the longitudinal groove 101 itself becomes a resistance, and there is a problem that it cannot be folded and crushed and deformed sufficiently.

Therefore, the present invention has a technical problem to create a cross-sectional shape of a crease line suitable for crushing deformation in order to solve the problems in the prior art in the container with a crease line.

Among the means for solving the above technical problems, the main configuration of the present invention is as follows.
In the synthetic resin container in which the mouth tube portion is erected from the upper end of the cylindrical body portion via the shoulder portion, and the groove ribs that are the crease lines for flattened crushing deformation are arranged on the peripheral wall,
During the crushing deformation, the crease line that functions as the starting point of the valley fold deformation is formed by a valley fold groove rib having a U-shaped cross section,
The crease line that functions as the starting point of the mountain fold deformation is formed by a mountain fold groove rib having a U-shaped bottom portion as a reverse U-shaped convex portion.

  The feature of the above configuration is that the crease line that functions as a starting point of valley fold deformation is formed by valley fold groove ribs having a U-shaped cross section, and the crease line that functions as the starting point of mountain fold deformation is The cross-sectional shape of the groove rib is selected according to the function of the crease line, such that the bottom portion having a U-shaped cross-section is formed by a mountain-fold groove rib having an inverted U-shaped convex portion.

Here, in many cases, this type of container is partially affixed to the peripheral wall surface of the body part, or the crease line is basically formed with groove ribs for use by winding a shrink label. As described above, when trying to fold a groove rib having a U-shaped cross-sectional shape, the groove rib itself becomes a resistance, and sufficient mountain fold deformation is impossible.
Thus, with the above configuration, the U-shaped bottom portion is maintained while maintaining the shape of the groove rib having a U-shaped cross-sectional shape as a whole and maintaining the label sticking property and the shrinkability of the shrink label. By forming the mountain-fold groove rib as an inverted U-shaped convex part, so-called so-called convex part that is already in a mountain-folded state can be used as a starting point, and the mountain-fold deformation can proceed smoothly and sufficiently. It becomes possible.

  According to another configuration of the present invention, in addition to the main configuration described above, the protruding position of the top of the convex portion of the mountain-fold groove rib is set to the inner side from the peripheral wall surface.

If the top of the convex part protrudes from the peripheral wall surface, the sticking property of the label and the rollability of the shrink label will be impaired, so the protruding position of the top part of the convex part of the mountain fold groove rib should be inside the peripheral wall surface. Is good.
Moreover, it is preferable to make a protrusion position inside a surrounding wall surface also from the point of the external appearance as a container, and a moldability.

Still another configuration of the present invention is the above main configuration,
The body part is a rectangular cylinder, and a vertical mountain fold groove rib that exhibits the function of a vertical fold line is provided at the center of the left and right sides of a pair of opposing body walls. Inclined mountain fold groove ribs exhibiting the function of the inclined crease line in the direction of the four corners of the
Further, horizontal trough groove ribs that exhibit the function of a horizontal crease line are disposed at the height positions near the upper and lower ends of the vertical mountain groove ribs.

The above configuration relates to a specific arrangement of the crease line in the rectangular container having a cylindrical body as the body portion,
First, when the pair of vertical mountain fold groove ribs are folded and the body is crushed flat, the inclined mountain fold groove ribs located above and below the vertical mountain fold groove ribs are in a mountain fold state along with this crushed deformation, And a horizontal valley fold groove rib will be in a valley fold state, and the triangular-shaped wall part which made a pair of vertical mountain fold groove rib the ridgeline will be in the state which made the business trip to the outward.
In this state, the container can be folded in a compact and crushed shape by folding the portion from the mouth tube portion to the shoulder portion and the bottom portion in the trunk direction.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the case of the main configuration of the present invention, in particular, the crease line that functions as the starting point of the mountain fold deformation is a mountain fold in which the bottom of the U-shaped cross-section is an inverted U-shaped convex portion. By forming it with groove ribs, the resistance to mountain fold deformation due to the U-shaped cross-sectional shape is suppressed to a small level, and the mountain fold deformation is smoothly and sufficiently started from the convex portion that is already in the shape of a mountain fold. Can be advanced.

It is a side view which shows one Example of the synthetic resin containers of this invention. It is a top view of the container of FIG. (A) is sectional drawing of the valley fold groove rib shown along the BB line in FIG. 1, (b) is sectional drawing of the mountain fold groove rib shown along the AA line and CC line. It is a schematic explanatory drawing which shows the aspect of the crushing deformation | transformation of the container of FIG. It is a perspective view which shows the container of a prior art example. FIG. 6 is a cross-sectional view of the longitudinal groove and the oblique groove of the container of FIG. 5.

Hereinafter, it demonstrates along the Example according to this invention, referring drawings.
1 to 3 show one embodiment of the synthetic resin container of the present invention, FIG. 1 is a side view, FIG. 2 is a plan view, and FIG. 3 (a) is a BB line in FIG. Sectional drawing of the valley groove groove rib 11v shown along line (b) is a sectional view of the mountain groove groove rib 11m shown along lines AA and CC.
This container 1 is a biaxially stretched blow-molded casing made of polyethylene terephthalate (hereinafter referred to as PET) resin, and has a mouth tube portion 2, a shoulder portion 3, a square tubular body portion 4, and a bottom portion 5. It is a rectangular housing having a length of 224 mm, a width of 66 mm, and a capacity of 720 ml.

  As shown in the plan view of FIG. 2, the planar cross-sectional shape of the body part 4 is a shape obtained by rounding a square corner part, and its peripheral wall forms a corner part with four panel-like body walls 4w. It is formed from a square wall 4c.

A large number of groove ribs 11 exhibiting the function of a crease line are disposed in each of the pair of opposite side walls 4ws of the body wall 4W in the case of flat crushing deformation.
The cross-sectional shape of these groove ribs 11 is one of the two types of cross-sectional shapes shown in FIGS. 3A and 3B, and FIG. The groove rib 11v is a groove rib having a U-shaped cross section that has been conventionally used for crease lines. Further, FIG. 3 (b) shows a mountain fold groove rib 11m disposed at a portion to be folded, and the U-shaped cross-sectional shape as a whole is the same as that of the valley fold groove rib 11v in FIG. 3 (a). It is characterized in that the letter-shaped bottom part is formed as a convex part 13 in an inverted U shape.

The groove rib 11 disposed on the side wall 4ws of the container 1 of the present embodiment includes a vertical mountain fold groove rib 11ma which is disposed in the vertical direction at the left and right central portions of the side wall 4ws and exhibits the function of a vertical fold line, and the vertical mountain fold groove. The four inclined mountain fold groove ribs 11mb that are arranged in the direction of the four corners of the side wall 4ws from the vicinity of the upper and lower ends of the rib 11ma and the height positions near the upper and lower ends of the vertical mountain fold groove rib 11ma. There are a total of nine horizontal trough groove ribs 11va arranged in the horizontal direction and exhibiting the function of horizontal crease lines.
In the present embodiment, the groove width W of the groove rib 11 is 4 mm, the groove depth D is 1 mm, and the protruding height of the convex portion 13 of the mountain-fold groove rib 11 m is 0 which is 1/2 of the groove depth D. .5 mm.

  Here, the direction of the arrow in FIG. 3A is the direction of valley folding, and the direction of the arrow in FIG. 3B is the direction of mountain folding, but the valley folding shown in FIG. In the vicinity of the groove rib 11v, the valley fold groove rib 11v can be easily used as a starting point, but conversely, in the mountain fold direction, resistance to mountain fold deformation due to the U-shaped cross-sectional shape is increased, which is sufficient. The deformation cannot be achieved.

On the other hand, in the vicinity of the mountain fold groove rib 11m shown in FIG. 3B, the mountain can be easily folded starting from the protruding portion 13 formed in a protruding shape at the bottom.
In addition, since the sticking property of a label and the winding property of a shrink label will be impaired if the top part of the convex part 13 protrudes from the surrounding wall surface 8, the protrusion position of the top part of the convex part 13 of the mountain-fold groove rib 11m is made into the surrounding wall surface 8. It is better to be inside.

  Next, FIG. 4 is a schematic explanatory view showing a state in which the container 1 is crushed flat and deformed using nine groove ribs 11. First, when a pair of vertical mountain fold groove ribs 11ma are folded and the body part 4 is crushed flat, four inclined mountain fold grooves positioned above and below the vertical mountain fold groove ribs 11ma in accordance with the crushed deformation. The rib 11mb is in a mountain folded state, the horizontal valley groove rib 11va is in a valley folded state, and a triangular wall portion is formed at a total of four locations above and below the vertical mountain groove groove rib 11ma with the pair of inclined mountain groove ribs 11mb as ridge lines. 9 will be in the state of a business trip to the outside.

In this state, the container 1 is folded in a compact and crushed shape by folding the portion from the mouth tube portion 2 to the shoulder portion 3 and the bottom portion 5 forward (in the direction indicated by the white arrow in the figure). Can do.
In particular, the container 1 of the embodiment is made of PET resin and has a relatively high rigidity even if it is thin. However, as in this embodiment, the mountain fold groove rib 11m and the valley fold groove rib 11v are appropriately disposed. The crushing deformation can be sufficiently achieved.

As mentioned above, although embodiment of this invention and its effect were demonstrated along the Example, this invention is not limited to this Example.
For example, in the embodiments, the example of the rectangular housing has been described, but the effect of the present invention is sufficiently exhibited even with the round housing. Further, the container is not limited to the one made of PET resin, and an appropriate synthetic resin can be selected according to the purpose of use.
In addition, the arrangement mode of the groove rib is not limited to the above-described embodiment, and the mountain folded groove rib is formed in the portion to be folded into the portion to be folded while assuming the form of crushing deformation according to the shape of the container. While arranging the valley groove ribs as appropriate, it is possible to obtain an optimum arrangement mode while taking the appearance into consideration.

As described above, the synthetic resin container of the present invention can sufficiently achieve crushing deformation even if it is a container having a relatively high rigidity by appropriately arranging the folded groove rib and the valley folded groove rib. It is expected to be widely used as a container considering disposal after use.

DESCRIPTION OF SYMBOLS 1; Container 2; Mouth part 3; Shoulder part 4; Trunk part 4w; Trunk wall 4ws; Side wall 4c; Square wall 5; Bottom part 8: Peripheral wall surface 9: Triangular wall part 11: Groove rib 11m; Vertical mountain fold groove rib 11mb; Inclined mountain fold groove rib 11v; Valley fold groove rib 11va; Horizontal valley fold groove rib 13; Convex part 101; Vertical groove 102; Skew groove W; Groove width D; Groove depth H; The

Claims (3)

Groove ribs (11) that erection the mouth tube part (2) from the upper end of the cylindrical body part (4) through the shoulder part (3) and become a crease line for flat crushing deformation on the peripheral wall In the case of the crushing deformation, the crease line that functions as a starting point of the valley fold deformation is formed by a valley fold groove rib (11v) having a U-shaped cross section, The crease line that functions as the starting point of the mountain fold deformation is characterized by the fact that it is formed by a mountain fold groove rib (11m) in which the U-shaped cross-sectional bottom part is an inverted U-shaped convex part (13). A synthetic resin container. The synthetic resin container according to claim 1, wherein the protruding position of the top of the convex portion (13) of the mountain-fold groove rib (11m) is located inside the peripheral wall surface (8). The body part (4) has a rectangular cylindrical shape, and a vertical mountain fold groove rib (11ma) that functions as a vertical fold line is disposed at the center of the left and right sides of a pair of opposing body walls (4w). An inclined mountain fold groove rib (11 mb) that functions as an inclined crease line is provided in the direction of the four corners of the trunk wall (4w) from the vicinity of both upper and lower ends of the groove rib (11ma), and the vertical mountain fold groove rib (11ma) 3) A synthetic resin container according to claim 1 or 2, wherein horizontal trough groove ribs (11va) exhibiting a function of a horizontal crease line are disposed at height positions in the vicinity of both upper and lower ends.

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