JPH0826240A - Plastic container for liquid - Google Patents

Abstract

PURPOSE:To enable laying many containers one upon another vertically as well as side by side laterally without causing them to deform so as to increase the storing efficiency in their transportation, storage, etc. CONSTITUTION:At the top of a substantially rectangular, pillar-shaped main body part horizontal planes 25 are formed at least in the vicinities of the four vertexes of the rectangle. On the other hand, in the lower part of the main body part contact planes 26 are provided, which, when a number of plastic containers 10 of this kind are laid one upon another vertically, come in contact with the aforementioned horizontal planes at least in the vicinities of the four vertexes; a recess 20 which admits the mouth 11 at the top of the container and the cap fitted over it is also provided. As a result, the load from a container 10H placed above, inclusive of the liquid contents, is born only on the parts at the corners of the rectangle, so that the container 10L placed under can bear up the load from many containers without undergoing deformation or buckling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid plastic container for containing mineral water, juice and the like.

[0002]

2. Description of the Related Art Many of the conventional liquid containers described above have a cylindrical shape. However, when storing a large number of such liquid containers in a large transport box or the like for transportation and storage, the cylindrical shape has poor storage efficiency. Therefore, a rectangular parallelepiped container having a rectangular horizontal cross section is also used.

[0003]

Considering the efficiency of transportation, storage, etc., it is desirable to store the liquid containers one above the other. However, the conventional rectangular parallelepiped containers cannot be stacked on top of each other, and even if they are stacked, there is a problem that the storage efficiency for the space around the cap portion is poor. Further, it is desirable to make the plastic container as light as possible, but for that reason, the strength is low, and there is a problem that the lower container is deformed when a large number of containers are stacked vertically.

The present invention has been made to solve the above problems, and its purpose is to transport,
It is an object of the present invention to provide a plastic container for liquids capable of stacking a large number of containers on the left and right sides as well as the upper and lower sides without being deformed in order to enhance storage efficiency during storage.

[0005]

A plastic container for liquids according to the present invention, which has been made to solve the above-mentioned problems, comprises: a) a substantially rectangular columnar main body; and b) an upper part of the main body, at least 4 in the above rectangle
It has a horizontal surface around each apex and a top with an inlet for charging / discharging liquid inside, and c) It is provided at the bottom of the main body and when the plastic containers are stacked vertically. A bottom portion having a contact surface that contacts the horizontal surface around at least the four apexes, and a recessed portion that can accommodate the injection port and the cap attached thereto. is there.

The cross-sectional shape of the main body is preferably substantially square.

[0007]

In order to prevent the two plastic containers Bh and Bl from being displaced when they are stacked vertically, in order to prevent the two containers Bh and Bl from shifting, as shown in FIG.
It is considered that the side surface Pb of the cap portion and the shoulder portion Pc are in contact with each other, and the weight of the upper container Bh (and the liquid therein) is mainly borne by the upper surface Pa of the cap portion, which is advantageous in terms of strength. . However, in this case, since the load stance range is narrow, the center of gravity of the upper container Bh exceeds the load stance range and falls down even if the upper container Bh swings slightly to the left and right. In addition, when such stacking is performed in multiple layers in the vertical direction, the shoulder portion (including the portion that is not in contact) Sld of the lowermost container is slid.
Buckles, and the upper container falls over as well. On the other hand, in the plastic container according to the present invention, when stacked vertically, the bottom contact surface of the upper plastic container contacts the horizontal surface of the top of the lower plastic container. Since the recess at the bottom of the upper plastic container does not come into contact with the inlet of the lower plastic container and the cap attached to it, the load of the upper plastic container (and the liquid contained therein) is lower than that of the lower plastic container. It does not hang on the inlet, but mainly hangs only on the top four corners (corners) of the rectangular pillar of the lower plastic container. As shown in FIG. 7B, when the circle C and the rectangle R or the square S having the same area are considered, the diagonal lines DR and DS of the rectangle R or the square S are longer than the diameter DC of the circle C. Therefore, in the plastic container of the present invention, when compared with a cylindrical plastic container having the same height and the same cross-sectional area (that is, the same volume), the range of standing for supporting the weight of the plastic container (and the liquid therein) is wide. Therefore, even when the plastic containers are stacked on top of each other, as shown in the axial structure in FIG.
A large number can be stacked in a more stable state without causing buckling.

In the case of a liquid plastic container, the periphery of the injection port needs to be inclined so that the liquid in the container is completely discharged. When the upper and lower plastic containers come into contact with each other on this inclined surface, as shown in FIG.
The load W of h (and the liquid in it) gives a component force Cm which is a horizontal force and a component force Sh which is a vertical force to the wall of the lower plastic container Bl. The wall member of a plastic container such as PET generally has sufficient strength against compression and tension by horizontal force, but is weak against bending moment and shear generated by vertical force, as shown in FIG. 7 (c). In the loaded state, the wall of the container Bl is deformed by a relatively small load (a small number of stacked ones), and the upper plastic container Bh is tilted. Even if this inclination due to the placement of one container is a small angle, the deformation becomes very large when a large number of containers are stacked.
On the other hand, in the plastic container according to the present invention, the surface for supporting the weight of the upper plastic container (and the liquid therein) is a horizontal surface, and the load points are arranged at the corners of the rectangle (or square). Therefore, FIG. 7 (d)
As shown in, the load of the upper container has a beam structure in which the beam (ridge) of the rectangular column of the lower container is supported. Therefore, even if a large number of liquid-containing containers are stacked on top of each other, the lower container can be supported without deformation.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention is shown in FIGS. FIG. 1 (a) is a front view (rear view is mirror symmetric of the container) of the present embodiment, and FIG. 1 (b) is a right side view (left side view is mirror symmetric). 2A is a plan view and FIG. 2B is A in FIG.
Sectional drawing which looked down from the -A 'line, (c) is a bottom view. 3A is an end view taken along the line BB ′ of FIG. 2A, FIG. 3B is an end view taken along the line CC ′ of FIG. 3A, and FIG. It is an end view cut by the DD 'line of (a). As can be seen from these figures, the container 1 of this example
0 has a substantially square cross section and has a constricted portion 14 at the center.
At the boundary, the upper portion 13 has concave portions 16 on all four side surfaces, and the lower portion 15 has convex portions 17 on two adjacent side surfaces and concave portions 18 on the other adjacent two side surfaces.

The material of the container 10 is preferably a synthetic resin having good workability (eg PET). Also,
In the case of a container filled with mineral water, juice, etc., it is desirable that it is transparent.

FIG. 4 is an end view of the longitudinal centerline of the container 10 of this embodiment, which is housed in a vertically stacked manner. Thus, the container 10 of this embodiment has a very high storage efficiency. Compared with a conventional cylindrical container without a recess at the bottom,
The container 10 of the present embodiment improves the storage efficiency when it is stored in a large shipping box or the like by about 30%.

FIG. 6 (a) shows a detailed load state in which the containers 10 of this embodiment are vertically stacked. As shown in this figure, in the container 10 of this embodiment, the upper and lower containers 10 are
The caps 11 and the slopes 12 do not contact H and 10L, and a slight gap 27 exists between them. Therefore, the load of the upper container 10H is
4 around the square cross section of the upper part 13 where H and 10L contact
It is supported by the same four sides of the side and the lower part 15.
However, since the central portion of each side is slightly weaker than the corner portion, it is the square corner portion that mainly bears the load of the upper container 10H. In this embodiment, the upper portion 13 and the lower portion 15
Since both corners are chamfered 22, they have sufficient strength against vertical load at the corners, and even if a large number of containers 10 are stacked, the lower container 10 can support the load without being deformed. it can. Note that FIG.
In (a), 25 is a load plane at the corner of the lower container 10L, and 26 is a contact plane 26 of the upper container 10H. As described above, the conventional container in which the shoulder contacts the upper container can support only a load of about 1.5 to 10 kgf, whereas the container 10 of the present embodiment can support a load of up to 30 kgf.

By making the gap 27 small, it is possible to obtain the effect of minimizing the deviation when the upper and lower containers 10H and 10L are stacked. Of course, there is an effect that the storage efficiency in the vertical direction is maximized.

In order to make the load at the corner more reliable, as shown in FIG. 6B, the central portion 28 of the square edge of the lower portion 15 is slightly curved so that the upper and lower containers do not come into contact with each other. You may

Although only the container having a square cross section has been described above, the effects of the present invention can be similarly obtained even when the container has a rectangular cross section.

The other features of this embodiment are summarized as follows. A plastic container for liquids having a) an upper slope portion provided on the upper portion of the main body portion and recessed toward the upper portion, and b) a cap portion provided at the tip of the upper slope portion, and c) the main body. C1) a cap accommodating part for accommodating the cap part, and c2) a bottom sloped part corresponding to the upper sloped part, and d) convex parts on two side surfaces of the main body part, e ) A concave portion corresponding to the convex portion is provided on the other two side surfaces.

These effects are as follows. It has already been mentioned that the accommodation efficiency in the vertical direction is high. Also in the horizontal direction, the convex portion 17 provided on the two side surfaces of the main body and the concave portion 18 provided on the other two side surfaces are fitted together, so that the storage efficiency is maximized. Also, multiple liquid containers (containers filled with mineral water, juice, etc. as products)
If you place them side by side on a display shelf, etc.,
Since the fitting of 7 and the recessed part 18 does not allow mutual positional deviation,
It is possible to arrange neatly and neatly without labor of the operator. Since the side surface of the conventional rectangular parallelepiped liquid container is almost flat, it takes a lot of time to arrange the ends neatly. Further, as shown in FIG. 6 (c), when the containers 10 are stacked vertically and horizontally in a state where the containers 10 are laid down, the projections 17 and the recesses 18 are fitted so that the upper and lower containers are securely fixed and collapsed. There is no fear of doing it.

In the container of this embodiment, the body portion is formed into the constricted portion 1.
It is divided into an upper part 13 and a lower part 15 at the boundary of 4, and the upper body part 13
With respect to (or one of the lower main body portions 15), since the concave portions 16 are provided on all four side surfaces, the container 10 is easy to hold by hand. Of course, all four surfaces of the lower main body portion 15 may be concave portions, and the upper main body portion 13 may be provided with two convex portions and two concave portions for mutual fitting. Constricted part 14
As such, it is useful when aligning the container 10 in the front, rear, left, right, etc. and binding it with a string or the like.

Since a plurality of horizontal concave-convex lines 19 are provided on the surfaces of the convex portion 17 and the concave portions 16 and 18, slipping when held by hand is prevented, and it can be held securely. The uneven line 19 also plays a role of preventing a fitting shift when the main containers 10 are densely arranged in the lateral direction or when the main containers 10 are laid down and stacked vertically.

Since this container has a substantially square horizontal cross section, the storage efficiency in storing in a large transport box or the like is generally improved, and the storage is easily automated.

Since the convex portions are provided on the two adjacent side surfaces, all the containers are arranged in the same direction when two-dimensionally displaying in a horizontal direction (two opposing surfaces are convex and another opposing two surfaces are concave. Then, it is necessary to change the direction of the adjacent container by 90 °), and it is easy to automate the storage in a large transport box or the like. In addition, as described above, the operation when the containers are laid down and stacked (FIG. 6C) is also easy.

Although the ease of display and loading work is sacrificed to some extent, when importance is attached to the effect of display by alternately arranging the labels at the time of display and the ease of holding the container in the hand. , As shown in FIG.
A convex portion may be provided on the surface and a concave portion may be provided on the other two opposing surfaces.

[0023]

When the plastic containers for liquid according to the present invention are stacked one above the other, since the cap portion of the lower container is accommodated in the recessed portion of the bottom of the upper container, a large transport box or the like for accommodating a large number of the containers. Storage efficiency is high. Further, since the load of the upper container is mainly applied to the corners of the lower container, it is possible to stack a large number in a stable state without causing deformation or buckling of the lower container.

The liquid plastic container according to the present invention can be used not only for transporting liquids but also as an assembled toy for children because of the above-described ease of assembly. It is also possible to put sand or water in it and use it as a block or weight for gardening.

[Brief description of drawings]

FIG. 1 is a front view (a) and a right side view (b) of a liquid container according to an embodiment of the present invention.

FIG. 2 is a plan view (a) of the liquid container of the embodiment, A-
Sectional drawing (b) which looked down from the A'line, and a bottom view.

3A is an end view taken along line BB ′ in FIG. 2A, FIG. 3B is an end view taken along line CC ′ in FIG. 3A, and FIG. An end view (c) taken along line D-D '.

FIG. 4 is an end view of the vertical center line in a state where the liquid containers of the embodiment are stacked vertically and horizontally.

FIG. 5 is an end view of a vertical center line of another embodiment of the present invention (a) and end views of an upper portion (b) and a lower portion (c).

FIG. 6 is a vertical cross-sectional view (a) showing details of a state in which the liquid containers of the present invention are vertically stacked, a side view (b) showing a modified example of the bottom portion, and a front view in which the containers are stacked and stacked. (C).

FIG. 7 is an explanatory diagram for explaining the effect of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Liquid container 11 ... Cap 12 ... Upper slope part 13 ... Upper body part 14 ... Constriction part 15 ... Lower body part 16 ... Recessed part of upper body part 17 ... Convex part of lower body part 18 ... Recessed part of lower body part 19 … Skid-proof uneven line 20… Cap housing 21… Bottom slope 22… Corner chamfer 25… Flat corner flat 26… Bottom flat 27… Gap between upper and lower containers 28… Escape at center of ridge

Claims (2)

[Claims] 1. A main body having a substantially rectangular columnar shape, and b) provided on the top of the main body and having at least the rectangular shape 4
It has a horizontal surface around each apex and a top with an inlet for charging / discharging liquid inside, and c) It is provided at the bottom of the main body and when the plastic containers are stacked vertically. A liquid having a contact surface that is in contact with the horizontal surface around at least the four apexes, and a bottom portion having a recess capable of accommodating the injection port and the cap attached thereto; Plastic container. 2. The liquid plastic container according to claim 1, wherein the main body has a substantially square cross section.