JPH0228189Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an improvement in the structure of a cover cup fitting part in a plastic container.

[Conventional technology]

In recent years, plastic containers such as biaxially stretched blow-molded polyethylene terephthalate bottles have been developed and widely used for containers such as beer and carbonated beverages whose filling containers are subject to high internal pressure.
However, such containers generally have a dome shape, generally a hemispherical shape, projecting outward due to design requirements and to prevent buckling due to internal pressure at the bottom.
Furthermore, a base cup is often worn to ensure erect posture.

Recently, there has been a trend to make containers for beer, etc., generally barrel-shaped as an example of vertically symmetrical shapes, and the bottom end of the peripheral wall corresponds vertically to the base cup, and the lower end of the peripheral wall has a slightly larger diameter than the body of the bottle body. There are many examples of barrel-shaped containers in which a cover cup shaped like this is attached to the bottle body.

[Problem that the invention attempts to solve]

However, in such conventional containers, especially when a handle is attached to the cover cup, or the cover cup itself has a special shape or decoration, the alignment of the label on the body of the bottle, that is, the printed display, lacks accuracy. There were defects in appearance that lowered the product value. This is said to be caused by the fact that the cover cup is capped after filling the container body with contents, but before the capping is done, the cover cup rises and rotates, making the positioning of the two inaccurate. Furthermore, when capping the bottle, it is difficult to keep the cover cup level, which causes poor capping of the cover cup and buckling of the bottle body.

[Means for solving problems]

The present invention aims to solve such problems by making it possible to accurately position the cover cup with respect to the label portion on the outer diameter of the barrel body, that is, with respect to the printed display, etc., and also to prevent poor capping when the cover cup is capped. Also, the bottle body is prevented from buckling.

That is, the present invention provides a plastic container main body which has a neck at the top, expands in diameter from the neck in an arc shape to the center of the body via a locking flange, and has a bottom projecting in a substantially hemispherical dome shape, and this container. In a plastic container consisting of a cover cup and a base cup which are inserted and attached to the neck and dome of the main body, three cups with circumferences approximately equally spaced are provided below the undercut to be engaged with the locking flange on the inside of the cover cup. This is a cover cup fitting structure for a plastic container, characterized in that a vertical rib having a dimension that is temporarily fixed to the outer edge of the flange of the container body is formed protrudingly.

[Effect]

In the present invention, when the cover cup is placed on the neck after filling the container body with contents, the vertical ribs provided on the circumferential wall of the cover cup temporarily engage with the flange of the container body, so that they can be separated from each other. , displacement can be completely prevented, allowing accurate positioning of the cover cup during subsequent capping, and ensuring the horizontality of the cover cup, preventing plugging defects and buckling of the bottle body when capping the cover cup. It is intended to prevent

〔Example〕

An embodiment of this invention will be described below with reference to the drawings. In the figure, 1 is a plastic bottle body obtained by blow molding, for example, polyethylene terephthalate resin.

At the top of this bottle body 1 is an arc-shaped diaphragm part 1.
A neck portion 1d having a threaded portion 1b and a flange 1c is formed on the outer periphery via the bottle body 1, and a cylindrical body portion 1e is formed below the shoulder portion 1a of the bottle body 1. And on the bottom side, the arc-shaped aperture part 1
It is integrally formed into a substantially hemispherical dome portion 1h via f and a hanging wall 1g extending thereto.

Next, reference numeral 2 denotes a base cup, which is attached to the main body so that its peripheral wall 2a is inserted and attached to the hanging wall 1g. Next, reference numeral 4 denotes a cover cup to which a handle 3 is attached, and has a ring body 4b on its inner periphery that is engaged with the outer periphery of the flange 1c and an undercut 4a, and extends outward from the ring body 4b. a horizontal wall 4c, an annular leg portion 4d that hangs annularly from the horizontal wall 4c and whose lower end extends to the shoulder portion 1a of the bottle body 1, a peripheral wall 4e, and the peripheral wall 4e;
It has a mounting hole 4f for the handle 3 which is diametrically opposed and is bored in the hole 4f. The height of the peripheral wall 4e is such that the threaded portion 1b of the bottle body 1 protrudes, so that the bottle can be easily opened. Note that 3a is an engaging portion of the handle.

As shown in an enlarged view in FIG. 2, on the inner surface of the ring body 4b below the undercut 4a of the cover cup 4, ribs 4g extending in the vertical direction are arranged so as to be approximately evenly spaced around the circumference of the ring body. , 4g... are provided. The number of ribs 4g should be three or more. By installing the rib 4g, the flange 1c of the container body 1 and the ring body 4b of the cover cup 4 are temporarily fixed to each other before the cover cup is plugged, and the rise of the cover cup can be prevented, and as a result, the cover cup The capping is performed by accurate positioning without rotation, thereby preventing the above-mentioned decrease in product value. In addition, since the horizontality of the cover cup can be maintained by temporary fixing before capping, it is possible to prevent poor capping and buckling of the bottle body when capping the cover cup.

Specifically, in a container as shown in the first diagram, the number of ribs is 12, the rib protrusion width is 1 mm, and the protrusion amount is 0.1 mm.
When capping, the ribs collapse smoothly and the cover cup is properly capped, resulting in products with poor alignment between the cover cup and the label on the bottle body, poor capping of the cover cup, and buckling of the bottle. There were none.

[Effect of idea]

As detailed above, this invention is based on a plastic container which has a neck at the top, expands in diameter from the neck to the center of the body in an arc through a locking flange, and has a bottom protruding into a substantially hemispherical dome shape. In a plastic container consisting of a main body, a cover cup and a base cup which are fitted and fitted onto the neck and dome of the container main body, there is provided a circumferential portion on the underside of the undercut which is engaged with the locking flange on the inside of the cover cup. Since the directional ribs are formed so as to protrude so that they can be temporarily fastened to the outer edges of three or more equally spaced flanges of the container body, the flange 1c of the container body 1 and the ring of the cover cup 4 are attached before the cover cup is plugged. The main bodies 4b are temporarily secured to each other, preventing the cover cup from rising up, etc., and as a result, the cover cup and the label on the body of the bottle are accurately aligned to cap the bottle, resulting in the above-mentioned commercial value. This prevents deterioration and maintains the levelness of the cover cup during capping, which has the effect of preventing poor capping of the cover cup and buckling of the bottle body.

[Brief explanation of drawings]

FIG. 1 is an overall cross-sectional view of the main parts of the plastic container of the present invention, and FIG. 2 is an enlarged cross-sectional view of the main parts of the cover cup. 1... Container body, 1c... Flange, 1d...
Neck, 1h...Dome part, 2...Base cup,
4...cover cup, 4a...undercut,
4g...Rib.

Claims (1)

[Scope of utility model registration request] A plastic container body 1 having a neck portion 1d at the top, the diameter expanding from the neck portion 1d to the center of the body in an arc shape through a locking flange 1c, and a bottom portion protruding into a substantially hemispherical dome shape, and this container body. In a plastic container consisting of a cover cup 4 and a base cup 2 which are inserted and fitted onto the neck portion and dome 1f of the plastic container 1, a circumference is set on the lower side of the undercut 4a which is engaged with the locking flange 1c inside the cover cup 4. A structure for fitting a cover cup in a plastic container, characterized in that three or more longitudinal ribs 4g are protruded and dimensioned to be temporarily fixed to the outer edge of the flange 1c of the container body 1, which are approximately equally spaced.