JPH0439144Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bottle structure, and particularly to a bottle structure in which a bottom plate is separately attached to a body molded body made of synthetic resin.

[Conventional technology]

Generally, bottles for storing liquids such as soft drinks are manufactured by molding a bottle-shaped preform from synthetic resin and expanding it in a mold. However, when transporting the bottles to the liquid filling process or temporarily storing them, they occupy the same amount of space as the filled product, so the transport equipment and storage space have to be larger, leading to higher costs. There was a fear that something would happen.

Therefore, a method described in Japanese Utility Model Application Publication No. 59-75409 has been proposed that does not take up wasted space during transportation or storage.

This is done by separating the bottle 10 into a body molded body 11 and a bottom plate 12 as shown in FIG. 3, and when transporting the bottle 10 to a liquid filling process or temporarily storing it, as shown in FIG. The body molded bodies 11 are handled in an overlapping state, and after filling with liquid, the bottom plate 12 is welded to the body molded body 11 by high frequency or ultrasonic waves, or the two are connected by screwing.

[Problem that the invention attempts to solve]

However, in the above-mentioned device, since the body part molded body 11 is formed with a taper that widens at a constant angle as it reaches the bottom edge 13, the body part molded bodies 11 come into close contact with each other, and as shown in FIG. It is difficult to sequentially take out the body molded bodies 11 from the stacked state.

Also, when overlapping the body part molded body 11, the diameter D3 of the shoulder part 14 of the body part molded body 11 and the bottom edge 13
Since there is little difference between the diameter D4 and the diameter D4, insertion is difficult.

Furthermore, if the means for attaching the bottom plate 12 to the body molded body 11 is by high frequency or ultrasonic welding, stress will concentrate on the welded part when the bottle is dropped.
There is a risk of damage from this part, and if it is screwed together, there is a risk of problems with rail properties.

The present invention has been made in view of the above-mentioned matters, and the technical object is to provide a bottle structure in which it is extremely easy to stack and sequentially take out the body molded bodies, and it is also easy to mechanize these operations.

[Means for solving problems]

In order to solve the above-mentioned technical problem, the present invention has the following structure in a bottle structure in which a bottom plate 5 is combined with the bottom of a body molded body 1 having a mouth 2 formed in the upper part. did.

The bottom edge 3 of the body molded body 1 is expanded outward, and its curvature increases as it reaches the bottom edge 4.

Further, the bottom plate 5 was formed of a metal plate and its outer peripheral edge was wrapped around the bottom edge 4 of the body molded body 1 to obtain a bottle structure.

[Effect]

Since the bottom edge 3 of the body molded body 1 is expanded outward and its curvature is increased as it reaches the bottom edge 4, the bottom edge 3 has a shape that widens toward the end, and is overlapped. Matching becomes extremely easy.

Moreover, since the body of the body part molded body 1 is curved, the body part molded bodies 1 do not come into close contact with each other. Then, when the outer peripheral edge of the metal bottom plate is wrapped around the bottom edge of the molded body, the warp of the bottom edge of the molded body, which had expanded outward, slightly shrinks, and this drag causes the winding. The joint of the attached part becomes strong.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 and 2.

A mouth portion 2 is formed in the upper part of the body molded body 1, while the bottom edge portion 3 side is left open. A cap 8 is fitted into the mouth 2, so that the contents can be injected with the molded body 1 turned upside down with the cap 8 in place.

The bottom edge 3 of the body molded body 1 expands outward and is shaped like a bell so that its curvature increases as it approaches the bottom edge 4.

Therefore, the diameter D1 of the shoulder portion 7 and the diameter D2 of the bottom edge 4
The difference between the two becomes larger, and superimposition becomes easier.

In addition, in the stacked state, the shapes of the overlapping surfaces of the molded body parts 1 do not match, resulting in line contact, and when the molded body parts 1 are taken out one after another, the molded body parts 1 stick together and become difficult to take out. Never.

After the contents are injected into the body molded body 1, the bottom edge 4 is closed with a bottom plate 5 formed of a metal plate.

This bottom plate 5 is formed into a dish shape and has a convex portion 6 that fits inside the body molded body 1, and after the injection process, this is fitted to the bottom edge 4 of the body body molded body 1. At the same time, the peripheral edge of the bottom plate 5 is curled together with the bottom edge 4. The bottom edge 3 of the body molded body 1, which is expanding outward, becomes inwardly reduced in diameter, and the outward restoring force acts to bring it into close contact with the curled portion of the bottom plate 5, reducing its rail properties. Improve.

Thereby, the bottom plate 5 can be firmly attached to the body molded body 1.

In addition, since the bottom plate 5 is made of metal, it can withstand the internal pressure inside the bottle and can significantly reinforce the bottom of the bottle.

[Effect of idea]

According to the present invention, since the bottom edge of the body molded body is expanded outward and the bottom edge is shaped to widen toward the end, overlapping becomes extremely easy.

In addition, since the body of the body molded body has a curved surface,
Even in the stacked state, the molded body parts do not come into close contact with each other, and the molded body parts can be easily taken out.

In this way, since overlapping and taking out are facilitated, it is also possible to mechanize these operations, and work efficiency can be improved.

Moreover, when the outer peripheral edge of the metal bottom plate is wrapped around the bottom edge of the body molded body, the warp of the bottom edge of the body molded body, which had expanded outward, acts to contract slightly, and the winding occurs due to the drag force. Since the joints between the parts become stronger, the sealing performance is improved. Furthermore, since the bottom plate is made of metal, it can withstand the internal pressure inside the bottle and can significantly strengthen the bottom of the bottle.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, FIG. 1 is a partial cross-sectional view showing the overlapping state, FIG. 2 is a partial cross-sectional view showing the state with the bottom plate attached, and FIG.
3 and 4 show a conventional bottle structure, FIG. 3 is a cross-sectional view, and FIG. 4 is a cross-sectional view showing a stacked state. 1... Body molded body, 2... Mouth, 3... Bottom edge, 4... Bottom edge, 5... Bottom plate.

Claims (1)

[Claims for Utility Model Registration] In a bottle structure in which a bottle is formed by combining a bottom plate 5 with the bottom edge 4 of a body molded body 1 having a spout 2 formed at the top thereof, the bottom of said body body molded body 1 The edge 3 is expanded outward and its curvature increases as it reaches the bottom edge 4, and the bottom plate 5 is made of a metal plate and its outer periphery is wound around the bottom edge 4 of the body molded body 1.