JPS5841148Y2 - Saturated polyester resin bottle with fitted leg members - 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.

Traditionally, glass bottles have been used as large bottles for this type of dispensing, but because they are large bottles, they have to withstand the pressure inside the bottle, as well as the weight of the liquid they are filled with. Therefore, it is necessary to make the bottle quite thick, which increases the overall weight, which increases transportation costs and makes it inconvenient to carry.

For the above-mentioned drinking water, the cost of containers and transportation costs account for an extremely large proportion of the price compared to other products, and the large bottles mentioned above have the purpose of reducing the cost of containers, but they are also convenient to carry. It has limitations in its sexuality.

In order to eliminate this drawback, we created a large bottle made of biaxially stretched synthetic resin, with the shoulders shaped like scraps, the body shaped into a cylindrical shape, and the bottom wall shaped into a spherical shape that protrudes downward. There have been attempts to form bottles and use them, and it has been confirmed that forming them in this way 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 bottle body, which has a threaded portion 3 for screwing the cap 2 on the mouth and neck portion 4, and protrudes downward and outward in a spherical shape via a shoulder portion 5 formed in the shape of a scrap. A cylindrical body part 7 having a bottom wall 6 at the lower end is vertically disposed, 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 formed by stretching two wheels. It is a large bottle.

It is preferable that a downward stepped portion 8 is provided at the lower part of the body 7, and that the lower body has a smaller outer diameter portion 9 than the upper part to facilitate fitting of the leg members described below.

A leg member 10 is fitted into the lower part of the trunk.

The leg member fits into the lower part of the bottle body, and has a peripheral wall 12 having a circular cross section erected from the peripheral edge of the bottom wall 11.

The bottom wall is formed by having a disk-shaped portion 13 at its center and a ground-contact portion 15 projecting horizontally outward through a tapered portion 14 that expands downward and outward from its periphery.

The upper part of the peripheral wall 12 is tapered to have a larger diameter than the lower part, and its upper end 17 is slightly bent upwardly and inwardly in order to fit the upper edge 16 to the downward step 8 of the bottle body. It is.

The leg members may be formed by blow molding integrally with a connecting member 18 having a shape in which the upper end surface of the peripheral wall is continuous with the butt as shown in FIG. 2, and then molding by cutting the connecting member. Compressed air inlet 19 attached during blow molding
The proximal end can also be removed.

When the leg member 10 is fitted to the lower part of the bottle body 1, the upper edge 16 of the peripheral wall and the downward step 8 engage with each other, and the bottom surface 6a of the bottle body can be placed on the inner surface of the bottom wall of the leg member. Provided for.

This design has the above-mentioned structure; the bottle body is made of biaxially stretched saturated polyester resin, so it has excellent mechanical properties even though it is thin; As the bottom wall was formed in a spherical shape, it could withstand the pressure inside the bottle filled with high pressure, and even though the bottom wall was formed in a spherical shape, the leg members were fitted into the bottom wall, so the bottle could be made to stand upright. Can be done.

In addition, the leg member 10 has the upper end 17 of the peripheral wall 12 slightly bent inward and upward to increase the elasticity in the radial direction of the upper end edge 16 that supports the lower part of the weir main body 1. When fitted to the lower part of the main body 1, the upper edge 16 forms the small outer diameter portion 9.
The bottle body 1 can be supported stably and reliably by being strongly crimped by elastic reaction force.

In addition, the downward stepped portion 8 of the bottle main body 1 is fitted with the leg member 10.
The lower part has a small outer diameter part 9, and the leg member 10 is fitted by line contact with the upper edge 16 of the peripheral wall 12 due to the bending, not the surface of the peripheral wall 12, so it is easy to fit and attach it to the lower part of the weir main body 1. Therefore, since it is possible to use a material with high strength, it is suitable for supporting large bottles, and furthermore, since the cushion in the vertical direction is large, it has the advantage of being able to absorb shocks such as drops.

Moreover, in the fitted and supported state, the upper edge 16 of the peripheral wall engages with the downward step 8 of the body, and the bottom surface of the bottle body 1 is connected to the leg member 10.
Since the leg members 10 are provided so as to be in contact with the upper surface of the bottom wall 11 of the bottle, and the leg members 10 have high elasticity in the vertical and lateral directions, the stress of supporting the bottle body is effectively dispersed, and the leg members 10 are difficult to break. Even large bottles can have sufficient support strength.

Even though the leg members are fitted in this manner, it is possible to obtain a bottle that is lightweight, inexpensive, and has sufficient strength.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of the present bottle, and FIG. 2 is a sectional view of a connecting member for forming a leg member for fitting into the bottle body. 1... Bottle body, 10... Leg member, 18
・・・・・・Connecting material.

Claims (1)

[Scope of utility model registration request] A cylindrical body part 7 whose lower part has a small outer diameter part with a downward step part 8 is suspended from the mouth part 4 via a shoulder part 5 in the form of a scrap,
A large bottle main body 1 made of a saturated polyester resin is provided with a bottom wall 6 projecting downward in a spherical shape from a small outer diameter portion 9, and at least a portion other than the neck portion 4 is biaxially stretched.
A peripheral wall 12 having a circular cross section is erected from one peripheral edge, and the upper end 17 of the peripheral wall 12 is slightly bent inward and upward, and the upper end edge 16 of the bent part 17 is engaged with the downward step 8. At the same time, the leg member 10 made of synthetic resin is attached to the outer surface of the small outer diameter portion 9 and fitted to the lower part of the body of the bottle body. A saturated polyester resin bottle fitted with a leg member, characterized in that the bottom surface is placed on the upper surface of the bottom part 11 of the leg member 10.