JP3858168B2 - Synthetic resin housing - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin casing which can be easily reduced in volume and deformed and can be used after being restored to its original form.
[0002]
[Prior art]
Synthetic resin casings molded by blow molding or biaxial stretch blow molding means are frequently used as containers for various liquid contents.
[0003]
[Problems to be solved by the invention]
However, while this synthetic resin casing has the advantage of being lightweight, it is bulky and occupies a large space. Therefore, after being molded by a container manufacturer, it is delivered to the product manufacturer and filled with the content liquid. In the process up to this point, there has been a problem that the storage cost and the transportation cost are high, and the handling is troublesome.
[0004]
In addition, after use, in order to facilitate the disposal process, it is usually crushed flat with hands and feet to reduce its volume, but anyone can easily and reliably perform this crushing. There was a problem that it was not possible.
[0005]
As a technique for facilitating the crushing of the casing at the time of disposal, there is a technique described in Japanese Utility Model Publication No. 60-75212.
[0006]
The synthetic resin casing described in this publication is provided with a pair of vertical ribs at an axially symmetric position of the trunk portion, and following the vertical ribs, an arc-shaped rib extending toward the shoulder portion and the lower end portion of the trunk portion is continuously provided. At the time of disposal, the portion surrounded by the ribs is pressed and deformed by depression, thereby reducing the volume.
[0007]
However, in this prior art, the depressed part is from the shoulder part to the lower end part of the trunk part, and the mouth tube part and the bottom part remain in the original shape, so that the whole is sufficiently flattened and deformed. In addition, there is a problem that it cannot be performed, and because it is intended for crushing at the time of disposal, it is almost impossible to restore a part that has been depressed once to its original shape.
[0008]
Therefore, the present invention was devised to solve the above-mentioned problems in the prior art, and enables the synthetic resin casing to be easily and sufficiently flattened and reducibly reduced and deformable. It is an object to reduce the cost by making the handling from the molding to filling the contents liquid and the disposal process easy and efficient.
[0009]
[Means for Solving the Problems]
In order to solve the above technical problem, the present invention configured a synthetic resin casing as follows.
1. Each cross-sectional shape of the shoulder portion, the trunk portion, and the bottom portion has substantially the same shape in which two arcs whose central angles do not exceed 180 degrees are combined face to face,
An inversion line having an inclined step shape is included over the entire circumference in the longitudinal direction of the shoulder portion, the trunk portion, and the bottom portion, including a combination line of the two arcs, and symmetrical about the central axis of the shoulder portion, the trunk portion, and the bottom portion. Provided continuously,
One half of the reversal line is formed in a normal thick half-shell, and a mouth tube portion is erected on the shoulder at the upper end of the reversal line, and the other half is separated from the half-shell by the reversal line. It was formed in a reversing part having a slightly smaller diameter and thin elastic reversible deformation, whereby the whole reversing part could be easily deformed into a half shell and restored to its original shape.
[0010]
The casing formed by the container manufacturer is inverted from the inversion line by pressing the inversion part inward, and the entire inversion part is depressed and reduced in volume in the half-shell.
[0011]
As a result, the bottom part of the shoulder part and the body part are depressed and deformed, and the mouth tube part is provided on the half shell part side, so that the entire housing is sufficiently flattened. Handled in a state of being converted into a product and delivered to the product manufacturer.
[0012]
In the product manufacturer, the inverted part that has been deformed by depression is reversed outward by air pressure, restored to the original shape at the time of molding, and then filled with the content liquid for use in the product. Alternatively, the content liquid is directly injected into the volume-reduced housing, the inverted part that has been deformed by depression is reversed outwardly, and the content liquid is filled as it is for use in a product.
[0013]
At the time of disposal after the use of the housing, the inversion part is again deformed to reduce the volume, and the disposal process is performed.
[0014]
The invention of 2 adds the fact that the thickness of the inversion part is set to 2/3 or less of the thickness of the half shell part to the invention of 1 above.
[0015]
According to the second aspect of the invention, it is possible to more easily and smoothly achieve the collapsed volume reduction deformation and the restoration to the original shape by elastic reversal of the reversing portion.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The casing of the present embodiment is formed so that the entire planar shape becomes a substantially oval shape by blow molding of an appropriate synthetic resin material, etc., and the shoulder 2 portion on one side of the long axis is formed. A cylindrical mouth tube portion 1 is erected.
[0017]
At a position on the long axis, which is an axially symmetric position of the housing, an inversion line 5 having an inclined step shape is continuously provided over the entire circumference in the vertical direction of the shoulder 2, the body 3, and the bottom 4.
[0018]
One half (left side in the figure) half from the inversion line 5 is formed into a half-shell portion 6 which is formed into a normal wall thickness and is relatively hard and easy to grip. A cylindrical portion 1 is erected.
[0019]
In addition, the other half (right side in the figure) of the inversion line 5 is a thin wall having a slightly smaller diameter than the half shell portion 6 as a whole and not more than 2/3 of the thickness of the half shell portion 6. It is formed in the formed reversing part 7 that is elastically reversible and deformable.
[0020]
Therefore, the reversing portion 7 is easily elastically reversed by the inward pressing, and the whole is depressed and reduced in deformation in the half shell portion 6 (see the two-dot chain line in the figure). By applying a force in the opposite direction and turning it outward, it can be easily restored to its original shape.
[0021]
In addition, the relatively hard half-shell portion 6 has a hardness that is easy to grip, and therefore can be handled and handled in the same manner as a normal casing, and is soft like a conventional volume-reducing casing. Therefore, it cannot be said that a stable grip cannot be performed.
[0022]
【The invention's effect】
Since the present invention has the above-described configuration, the following effects can be obtained.
The container molded by the container manufacturer is inverted and deformed in the half shell, so that almost half of the shoulder, body, and bottom are deformed, and the mouth tube is provided on the half shell side. Therefore, the entire housing can be reduced in volume sufficiently.
[0023]
And, by handling in a sufficiently flattened and deformed state, the occupied space can be greatly reduced, thereby reducing costs for storage, transportation, etc. in the process until the content liquid is filled. And can be handled easily and efficiently.
[0024]
In addition, the housing after the reversing part is restored to its original shape and used as a container can be disposed of by deforming the reversing part again, reducing the volume sufficiently flat and being disposed of. Anybody can easily and sufficiently achieve the volume-reducing deformation of the housing, and can easily and efficiently perform the disposal process.
[0025]
Further, since the gripping of the half shell can be stably achieved, the gripping and handling of the housing can be achieved in the same manner as for a normal housing.
[Brief description of the drawings]
FIG. 1 is a side view, partly in section, showing a first embodiment of the present invention.
FIG. 2 is a plan view, partly in section, of the embodiment shown in FIG.
[Explanation of symbols]
1; mouthpiece part 2; shoulder part 3; trunk part 4; bottom part 5; inversion line 6; half-shell part 7;

Claims (2)

Each flat cross-sectional shape of the shoulder portion (2), the trunk portion (3), and the bottom portion (4) has substantially the same shape in which two arcs whose central angles do not exceed 180 degrees are combined face to face,
The shoulder portion (2), the trunk portion (3) including a combination line of the two arcs and symmetrical about the central axes of the shoulder portion (2), the trunk portion (3) and the bottom portion (4) And an inclined step-like inversion line (5) is continuously provided over the entire circumference in the vertical direction of the bottom (4),
One half of the reversal line (5) is formed into a normal thick half-shell (6), and a mouth tube (1) is erected on the shoulder (2) at the upper end of the reversal line (5). The other half of the line (5) is formed in a reversing part (7) that is slightly smaller in diameter than the half shell part (6) and is thin and elastically deformable, so that the whole reversing part (7) is formed. A synthetic resin casing that can be easily depressed and deformed in the half shell (6) and can be restored to its original shape.   The synthetic resin casing according to claim 1, wherein the thickness of the inversion part (7) is set to 2/3 or less of the thickness of the half shell part (6).

Images