JPS5822933Y2 - Container to prevent stopper from returning - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a technology that makes it possible to prevent the cap from returning to its original state by improving the screws on the cap or bottle opening. This invention relates to a stopper return prevention container characterized in that the innermost thread of the container is thicker than the other threads.

When a plastic bottle or a plastic cap is used, the material has elasticity, so even if the cap is tightly closed, the bottle automatically returns to its original state.

In particular, when a resin such as polypropylene, which has excellent chemical resistance, is used, its high elasticity causes a noticeable phenomenon of capping back, resulting in liquid leakage from the opening of the bottle.

The container according to the present invention is based on a technology that fundamentally improves these drawbacks, and in particular, the threads of some of the screws protruding from the inner wall of the cap or the mouth of the bottle are made thicker than those of other threads. This relates to a completely new technology in which screws are tightly engaged with each other to prevent the plug from returning.

One embodiment of the container according to the present invention will be explained in detail with reference to the drawings. In Fig. 1, A is the mouth of the bottle, and around it is a screw thread of 1°2 with a constant pitch. .3 is installed protrudingly.

Next, B is a double cap, and its inner wall surface has screw threads 4, 5.6 which correspond to the threads 1°2.3 of the opening A.
are provided protrudingly at a constant pitch.

The threads 4 provided at the entrance of the cap B and the threads 5 at the center have a diameter that allows them to be loosely inserted into the valley formed by the threads 1, 2.3 of the mouth A, Furthermore, the thread 6 provided at the back of the cap B has a thicker thread than the threads 4 and 5, that is, the thread 6 is thicker than the threads 4 and 5.
The width is slightly wider than the width of the valley formed by the screw threads 1, 2, and 3.

Next, FIG. 2 is an explanatory cross-sectional view showing a state in which the bottle opening A and the cap B shown in FIG. Although it is inserted loosely between the threads 1 and 2 or on the outside, the threads 6 of the cap B have thick threads as mentioned above, so that the threads 6 of the cap B are inserted between the threads 2 and 3 of the mouth part A. It is firmly and forcefully inserted.

C in the figure is an inner stopper covered with the upper end of the bottle opening A.

Also, in the above embodiment, the double cap B has three screw threads 4 and 5.
．． 6 was provided protrudingly. However, as shown in FIG.
10, 11, 12, and 13 are protruded, and the screw thread 12.
It is also possible to configure the threads 13 to be thicker than the other threads 7...11.

As mentioned above, in the container according to the present invention, among the screws protruding from the inner wall of the cap or the bottle opening, the inner part or the upper part of the screw is made thicker than the other screws, so that the cap and the bottle are connected. At the final screwing stage when the screws are mated together, the thicker thread in the thread rides up onto the trough of the other screw, allowing the screw to forcibly intervene and securely screw together. It is possible to completely prevent the phenomenon of the cap coming back.

In addition, in the present invention, although some of the widths of the screws are thick, the pitch of all the screws is constant, so molding is easy.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of the container of the present application, FIG. 2 is an assembled longitudinal sectional view thereof, and FIG. 3 is a perspective view or longitudinal sectional view showing the other side. A: Bottle mouth, B, D: Cap,
C...Inner stopper, 1...13...
screw thread.

Claims (1)

[Scope of utility model registration request] In a container made of a combination of a cap with a screw on the inner wall and a bottle with a mouth with a screw on the outer peripheral wall, the thread inside the thread is located deep inside the cap and goes around the inner peripheral surface. A container that prevents the stopper from returning.