JPH0532446Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a cap for preventing tampering, a so-called pilfer-proof cap.

[Conventional technology]

One of the traditional pilfer-proof caps is
Some caps consist of a cap body and a fitting body that engages and attaches to the cap body. FIG. 4 shows a cross section of the fitted body 2 of this conventional pilfer-proof cap. This is because the cylinder piece 3 and the ring piece 4 are connected by a plurality of thin pieces 5, and the inner diameter of the ring piece 4 is set to be slightly smaller than the outer diameter of the flange 9 of the bottle neck to which it is assembled. In the assembled state,
It is designed to be locked to the collar 9 from below. When the cap body 1 is opened, the thin wall piece 5 is cut, thereby indicating that the bottle has been opened.

A cut portion 12 is formed in a part of the ring piece 4, and when this fitting body 2 is assembled to the bottle mouthpiece, the inner diameter of the elastically deformed ring piece 4 can be increased, and the inner diameter of the ring piece 4 can be increased, and the inner diameter of the ring piece 4 can be increased. It is designed to be easily assembled.

Further, in the vicinity of the cut portion 12, the cylinder piece 3 and the ring piece 4 are connected by a connecting piece 13 that is thicker than the thin piece 5, so that the assembly of the cylinder piece 3 and the ring piece 4 is strengthened. By forming the cut portion 12 described above, the inner diameter of the ring piece 4 can be easily expanded with a small force, and the thin piece 5 can be easily expanded when assembled to the bottle neck. This is to prevent it from breaking easily.

[Problem that the invention attempts to solve]

The problem with the conventional pilfer-proof cap described above is that even when the cap body 1 is opened, the ring piece 4 is not completely separated from the cap body 1, and remains connected to the cap body 1. It is removed from the mouth tube. This is because the cylinder piece 3 and the ring piece 4 are connected by the thick connecting piece 13, and the connecting piece 13 or the thin piece 5 in the vicinity thereof is not cut.

This problem can be solved by making the connecting piece 13 as thin as the thin piece 5, but then the assembly between the cylinder piece 3 and the ring piece 4 becomes weak, and the Alternatively, another problem arises in that the thin wall piece 5 is cut during assembly.

If the cylinder piece 3 and the ring piece 4 are not completely separated, if the bottle is illegally opened and then reassembled to the bottle neck, the ring piece 4 will be connected to the cylinder piece 3, and the bottle will be opened. It becomes difficult to confirm whether the package is a genuine product or not, and the function of preventing unauthorized opening is not fully exerted.

The present invention was devised in view of these problems, and it can be easily assembled to the bottle mouthpiece, and when the ring piece 4 is opened, the ring piece 4 is completely separated from the cylinder piece 3, making it easy to open the bag by visual inspection. The purpose of the present invention is to provide a pilfer-proof cap that can confirm that it has been made.

[Means for solving problems]

Therefore, it is a pilfer-proof cap that is attached to a bottle spout, which has a thread around the upper end of the outer circumferential surface and a flange 9 just below the thread. A cap body 1 has a screw thread around it and a projecting piece 6 protruding from the lower end of the outer peripheral surface of this peripheral wall, and an upper end of a cylindrical piece 3 whose inner peripheral surface faces the outer peripheral surface of the lower end of the cap body. An engaging piece 7 that engages with the projecting piece 6 of the cap body 1 is provided on the ring piece 4, and the outer peripheral surface of the ring piece 4 is engaged with the flange 9 from below and has its upper surface facing the lower end of the cap body 1 from below. A fitted body 2 is connected to the inner peripheral surface of a cylinder piece 3 by a plurality of thin pieces 5, and a ring piece 4 of this fitted body 2 is formed with an expandable and contractible part 8, and a plurality of The wall thicknesses of the thin wall pieces 5 were all set to be equal.

[Effect]

When assembling the pilfer-proof cap according to the present invention to the bottle neck, the ring piece 4 comes into contact with the outer peripheral surface of the bottle neck (particularly the flange 9). 8 expands, the inner diameter of the ring piece 4 becomes larger, and it can be easily assembled to the bottle mouthpiece (this assembled state is shown in FIG. 1).

Furthermore, expansion of the inner diameter of the ring piece 4 is limited to a certain limit by the expandable portion 8 and does not increase further, so that the thin piece 5 is not cut during assembly or the like.

When assembling this pilfer-proof cap to the bottle mouthpiece, the ring piece 4 is attached to the cap body 1.
Since the upper surface is opposed to the lower end of the bottle from below, the assembly force of the cap body 1 against the bottle mouthpiece directly acts as a downward force on the ring piece 4, that is, as a force for the ring piece 4 to overcome the flange 9. Therefore, when the pilfer-proof cap is assembled to the bottle mouthpiece, no unnecessary pulling force is applied to the thin wall piece 5 at all.

When the cap is opened, the cap body 1 is displaced upward, but
As a result, the thin piece 5 is cut. There are a plurality of thin pieces 5, and all of them have approximately the same thickness, so they are all cut, and the ring piece 4 is completely separated from the cylinder piece 3 and assembled to the bottle mouthpiece. (This situation is shown in FIG. 2).

〔Example〕

One embodiment is shown in FIGS. 1 to 3.

In this embodiment, the lower end of the peripheral wall of the cap body 1 is brought into contact with the upper end of the ring piece 4. By doing this, the pressing force when assembling this pilfer-proof cap to the bottle mouthpiece acts directly on the ring piece 4, and conversely, no force acts on the cylinder piece 3 or the thin wall piece 5. , the thin piece 5 is not cut.

The ring piece 4 is composed of an annular ring body 10 and locking protrusions 11 provided on the inner peripheral surface of the ring body 10 at equal intervals. This locking protrusion 11 locks onto the flange 9 of the bottle mouthpiece from below. Furthermore, the locking protrusion 11 has a tapered shape that extends downward and outward, which makes it easy to get over the outer circumferential surface of the bottle mouthpiece (particularly the flange 9) during assembly, and once assembled. After joining, it became difficult to leave Tsubajo 9.

The shape and number of the extensible portions 8 are not limited to those shown in the illustrated embodiment, but may be appropriately set within a range that achieves the desired effect. For example, if it is necessary to make the inner diameter of the ring piece 4 even larger, it is possible to lengthen the telescopic portion 8 or increase its number.

The extensible portion 8 is preferably set to such an extent that it can be sufficiently expanded by the pressing force when assembled to the bottle mouthpiece, and not so much expanded by the force acting on the ring piece 4 when opening the bag.

The shape and number of the locking protrusions 11 are also set appropriately. For example, if it is desired to further strengthen the engagement with the collar 9, the length in the circumferential direction can be increased or the number can be increased.

In this embodiment, the cap body 1 is made of aluminum, and the fitting body 2 is made of synthetic resin.
Since the fitted body 2 is made of synthetic resin, it makes a loud sound when the thin piece 5 is cut during opening, and the opening can also be confirmed by this sound.

Visual confirmation can also be made easier by setting the tube piece 3 and the ring piece 4 in different colors.

[Effect of idea]

In this way, the pilfer-proof cap according to the present invention, by forming the expandable portion 8, can be easily assembled to the bottle mouthpiece, and also prevents the thin wall piece 5 from accidentally coming off before or during assembly. Will not be cut by the force of.

Furthermore, by setting all of the thin pieces 5 to approximately the same thickness, when the bottle is opened, all of the thin pieces 5 are cut off and the ring piece 4 remains in the bottle mouthpiece.
It exhibits excellent effects such as being able to easily visually confirm whether the package has been opened or not.

[Brief explanation of the drawing]

Fig. 1 is a partially enlarged cross-sectional view showing an embodiment of the present invention when assembled, Fig. 2 is a partial cross-sectional view showing it in an unsealed state, and Fig. 3 is a cross-sectional view of the fitted body of the present invention. FIG. 4 is a cross-sectional view of a conventional fitted body. Explanation of the symbols, 1...Cap body, 2...Fitting body, 3...Cylinder piece, 4...Ring piece, 5...Thin piece, 6...Protruding piece, 7...Engaging piece, 8... telescopic part,
9... Flange strip, 10... Ring body, 11... Locking protrusion, 12... Cutting portion, 13... Connecting piece.

Claims (1)

[Scope of utility model registration request] A pilfer-proof cap that is attached to a bottle spout having a thread around the upper end of the outer circumferential surface and a flange 9 provided just below the thread, and which is screwed to the bottle spout on the peripheral wall. a cap body 1 having a thread around the circumference and a projecting piece 6 protruding from the lower end of the outer peripheral surface of the peripheral wall; and a cylindrical piece 3 whose inner peripheral surface faces the outer peripheral surface of the lower end of the cap body 1.
An engaging piece 7 that engages with the protruding piece 6 is provided at the upper end, and is engaged with the bottle neck flange 9 from below,
and a fitted body 2 in which the outer circumferential surface of a ring piece 4 whose upper surface faces the lower end of the cap main body 1 from below is connected to the inner circumferential surface of the cylinder piece 3 by a plurality of thin pieces 5;
A pilfer-proof cap comprising: a ring piece 4 formed with an expandable part 8 which can be expanded and contracted; and a plurality of thin pieces 5 having approximately the same thickness.