JPS588669Y2 - Saturated polyester resin bottle with fitted hakama-like legs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a large bottle made of saturated polyester resin for filling, for example, carbonated drinking water, which requires filling under high pressure.

Conventionally, glass bottles have been used as large bottles of this type, that is, large bottles for dispensing, but because they are large bottles, the weight of the liquid filled becomes large, and in addition to being able to withstand the pressure inside the bottle. It is necessary to use a fairly thick inner bottle, which increases the overall weight of the bottle, which increases transportation costs and makes it inconvenient to carry. Compared to other products, the proportion of transportation costs is extremely low, and although the large bottles mentioned above have the purpose of reducing container costs, they have limitations in terms of ease of carrying.

In order to eliminate this drawback, we created a large biaxially stretched synthetic resin bottle with smooth shoulders, a cylindrical body, and a spherical bottom wall that protrudes downward. There have been attempts to use the bottle in this way, and it has been confirmed that the bottle is thin and lightweight, and can withstand the pressure inside the bottle.

However, if the bottom wall protrudes downward in a spherical shape, the bottle cannot be stood up, so it is necessary to attach legs, but these legs are also inexpensive and can be supported reliably for the reasons mentioned above. Moreover, it is required to have enough strength to withstand the weight of the liquid filling field.

This proposal is intended to meet such demands, and the drawings will be explained below.

Reference numeral 1 denotes a weir body, which has a threaded portion 3 for screwing the cap on the mouth and neck portion 2, and a bottom wall 5 which projects downward and outward in a spherical shape via a shoulder portion 4 formed in a shoulder shape. A large cylindrical body part 6 having a cylindrical body part 6 at the lower end is hung vertically, and at least the parts other than the mouth and neck part, that is, the shoulders, the body part, and the bottom wall part, are made of saturated polyester resin and are formed by biaxial stretching. It's a bottle.

It is preferable that the lower body portion is formed as a smaller diameter portion 6b than the upper portion to facilitate fitting of the bowl-shaped leg portion described later.

A bowl-shaped leg portion 7 is fitted into the lower part of the body.

The leg portion has an outer circumferential wall 8 provided at the upper part 8 so as to be tightly fitable to the lower body part of the weir body, and an inner circumferential wall 9 that stands up from the lower end of the outer circumferential wall 8. It has a bottom 10 connected to the upper end and curved convexly downward to receive the bottom wall 5 of the weir body, and is a thin molded member vacuum-formed from a sheet of a suitable synthetic resin.

Further, the lowermost part of the bottom surface of the bottom 10 is located at the same level as the bottom end of the outer peripheral wall 8, so that the bottom 10 comes into contact with a place such as a table top, and a part of the weight of the liquid in the weir body 1 is transferred to the place where the liquid is placed. It is designed to be directly supported by the location.

Although the inner surface of the outer circumferential wall 8 and the inner circumferential wall 9 are placed in close contact with each other, they may be welded or may be integrated by intervening a filler therebetween as shown in FIG.

Further, as shown in FIG. 3, a hollow annular protrusion 12 is provided inside the upper edge of the outer peripheral wall 8, or as shown in FIG. As shown in FIG. 3 and FIG.
A concave groove 14 is formed at the border between each annular protrusion 12, 13.
By fitting the rod-shaped leg portion 7 into the groove 14, the rod-shaped leg portion 7 can be fitted better, and the outer peripheral wall 8 thereof can also be made stronger, which is convenient.

According to the present invention, the weir body 1 is made of biaxially stretched saturated polyester resin, so it has excellent mechanical properties even if it is thin, and the shoulder part 4 has a sloping shape and the body part 6 has a cylindrical shape. Since the bottom wall is formed into a spherical shape that projects downward, it can withstand the pressure inside the bottle filled with high pressure, and even though the bottom wall 5 is spherical and projects downward, the rod-shaped leg portion 7 is fitted therein. This allows the bottle to stand upright, and even if the rod-shaped leg is a thin molded member of synthetic resin, it has an inner circumferential wall 9 inside the outer circumferential part 8, and the lowermost part of the bottom surface of the bottom 10 is connected to the outer circumferential wall 8. Since a portion of the load from the weir body is directly transmitted from the bottom 10 to the location at the same level as the lower end, it is possible to provide sufficient strength to support the weir body.

The structure of the legs is simple and can be manufactured at low cost using only a small amount of molding material.In this way, the bottle as a whole can be extremely lightweight and yet have sufficient strength, making it possible to manufacture carbonated drinks at low cost. Ideal for filling liquids with high internal pressure.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cut-away side view of one example, and FIGS. 2, 3, and 4 are partially cut-away side views of other important parts. 1... Weir body, 2... Mouth and neck, 4...
... Shoulder part, 5 ... Bottom wall, 6 ... Body part, 7 ... Rod-shaped leg part, 8 ... ... Outer peripheral wall,
9...Inner circumference, 10...Bottom.

Claims (1)

[Scope of utility model registration request] A saturated polyester resin having a mouth and neck part 2, a shoulder part 4 with a flat shoulder shape, a cylindrical body part 6, and a bottom wall 5 projecting outward in a spherical shape, and formed by biaxially stretching at least the parts other than the mouth and neck part. The bowl-shaped leg part 7 is made of a thin molded member, and the upper part of the bowl-shaped leg part 7 is made of a thin molded member. A fitting outer circumferential wall 8 is provided on the outer circumference of the lower part, and an inner circumferential wall 9 stands up from the lower end of the outer circumferential wall to the inner side of the circumferential wall.
A bottom 10 is provided which extends from the upper end of the inner circumferential wall 9 and curves convexly downward to receive the bottom wall 5 of the weir body, and the lowermost part of the bottom surface of the bottom 10 is at the same level as the lower end of the circumferential wall 8. A saturated polyester resin bottle with fitted bowl-shaped legs.