JPH0513735Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a lid that can prevent unauthorized opening during the distribution process, a so-called pilfer-proof cap.

(b) Problems to be solved by conventional techniques and ideas In order to prevent bottle caps from being illegally opened and poisonous substances being mixed in or the contents of the bottle being replaced during the distribution process. , various pilfer-proof caps have been developed.

As a conventional example of such a pill-proof cap, in the case of a synthetic resin cap, the cap body and the band portion are connected by a twistable portion such as a bridge portion or a score, and the band portion is closed when the twistable portion breaks when the cap is opened. There are caps that are separated from the main body to prevent unauthorized tampering, and two types of caps are used to lock the cap to the bottle spout: one is a band that is heat-shrunk to lock the cap to the bottle spout, and the other is a cap that has a locking tongue attached to the band. There is a mechanical type that is installed and locked to the bottle mouth.

Considering the additional heat shrinking process and the unsightliness of the band after heat shrinking, a mechanical type pilfer-proof cap is preferable.

The present invention relates to an improvement of a mechanical type pilfer-proof cap that locks onto the bottle opening using a locking tongue. There is an example in which a plurality of locking tongues that taper from the lower end to the tip are bent and arranged in a row, and the tips of the locking tongues are locked to the lower circumferential surface of the bulge in the mouth of the bottle. In addition, as in Japanese Patent Application Laid-Open No. 59-209545, there is an example in which a protrusion is provided on the inner wall of the lower end of the band portion, and this protrusion is locked to the lower circumferential surface of the bulge of the bottle mouth. However,
In JP-A No. 57-153862, the tip of the tongue does not engage the lower circumferential surface of the bulge in the mouth of the bottle, and the entire cap may fall out when the cap is opened.
In No. 209545, as in the conventional example, the protrusion on the inner wall at the lower end of the band does not engage with the lower circumferential surface of the bulge in the mouth of the bottle, and when the cap is opened, the entire cap may fall out. It may become completely useless as a safe-proof cap.

In addition, in the case of a mechanical type pill-proof cap that locks onto the bottle mouth using a locking tongue,
It was not clear how long the locking tongue should be in the circumferential direction to securely lock the locking tongue to the bottle mouth. or,
In this type of cap, when the cap is removed from the mold, the locking tongue located in the same direction as the peripheral wall of the cap body is formed so that it can be bent inward and locked to the bottle mouth. If the gap between adjacent tongues is small, the tongues will overlap during bending, which is undesirable.

In view of the above, the first object of the present invention is to provide a mechanical type pilfer-proof cap that can securely lock the lower band portion of the twistable portion to the bottle opening. A second object of the present invention is to provide a pilfer-proof cap in which the circumferential length of the locking tongues and the size of the gap between the tongues are within the most preferable range.

(c) Means for solving the problem The pill-proof cap of the present invention that achieves the above object is a pill-proof cap in which a band part is integrally formed from the lower end of the cap body through a twistable part. A plurality of tongue pieces tapering toward the tip are bent and connected from the lower end of the band, and the tongue pieces are connected to the lower peripheral surface of the bulging part of the bottle mouth. The inner and outer surfaces of the tip portion are flat, and a heel portion is formed on the bottle opening side surface continuously from the flat tip portion, so that when the cap is attached to the bottle opening, the tip portion meets the bulge of the bottle opening. It is sandwiched between the side walls of the cap, and the heel part is provided so as to lock onto the lower circumferential surface of the bulging part of the bottle mouth. It is characterized by having a gap of 0.5 mm or more between the tongue pieces.

The twistable portion includes a bridge portion, a score, and other portions that can be broken so that the main body and the band portion can be separated when the cap is opened.

(d) Actions and Effects Like the pill-proof cap of the present invention, a plurality of tongues that taper toward the tip and that are engaged with the lower peripheral surface of the bulge of the bottle mouth are folded from the lower end of the band. The tongue pieces are connected in a curved manner, and the tongue pieces have flat inner and outer surfaces at their tip portions, and a heel portion is formed on the bottle opening side surface continuously from the flat tip portions, and the tongue pieces are connected to each other in a curved manner. When the cap is attached, the tip portion is sandwiched between the bulge of the bottle spout and the side wall of the cap, and the heel portion is provided to engage with the lower circumferential surface of the bulge of the bottle spout, so that when the cap is attached, The heel part locks onto the lower circumferential surface of the bulge in the bottle mouth, and the tip of the tongue is sandwiched and pressed between the bulge in the bottle mouth and the side wall of the cap, so the band part of the cap securely holds the bottle. Attach to the mouth.

In addition, if the length in the circumferential direction of the bent position of the tongue piece is 3 mm or more (with a cap of 10 cm in diameter, the circumferential angle is 3 degrees or more), the tongue piece can be inserted into the bulge of the bottle mouth while maintaining the bent state. The cap body is firmly locked in place, and the twistable portion is broken without the tongue piece coming off when the cap is opened, allowing the cap body and the band portion to be reliably separated.

Also, if the gap between the tongues is 0.5 mm or more, when the tongues of the cap are removed from the mold and bent,
Adjacent tongue pieces do not overlap.

(E) Embodiment FIGS. 1 to 3 show a first embodiment of the pill-proof cap 1 of the present invention, which is made of plastic and has a band section formed from the lower end of the cap body 2 through a twistable section 3. 4 is integrally formed and is engaged with the lower circumferential surface 7 of the bulging portion 6 of the bottle mouth 5. A plurality of tongue pieces 8, 8, 8... which taper toward the tip are bent from the lower end of the band portion 4 and arranged in a row, and the adjacent tongue pieces 8
The length in the circumferential direction at the bending position is 3 mm or more,
The gap between the tongue pieces is 0.5 mm or more.

Specifically, the cap 1 of Example 1 is a pilfer-proof cap 1 in which a band portion 4 is integrally formed from the lower end of a cap main body 2 via a twistable portion 3, and a bulging portion 6 of a bottle opening 5. It locks onto the lower circumferential surface 7 of. A plurality of tongue pieces 8, 8, 8,... which taper toward the tip.
are bent and connected from the lower end of the band portion 4, and the tongue pieces 8, 8, 8, . A heel portion 9 is formed on the surface of the bottle spout side, and when the bottle spout 5 of the cap 1 is attached, the tip portion touches the bulge portion 6 of the bottle spout 5 and the band portion 4, as shown in detail in FIG. (side walls of the cap), and the heel portion 9 is provided so as to be engaged with the lower peripheral surface of the bulging portion 6 of the bottle mouth 5.

That is, when the cap 1 is attached, the heel portion 9 engages with the lower peripheral surface of the bulge 6 of the bottle mouth 5, and the tip portions of the tongue pieces 8, 8, 8... Since it is held down by the band part (side wall of the cap), the band part of the cap securely locks onto the bottle opening.

In the first embodiment, the twistable portion 3 is a bridge portion that integrally connects the cap body 2 and the band portion 4 at multiple points, and is broken when the cap is opened, and the band portion 4 is connected to the cap body 2. The package is separated from the package and is designed to be visible if it is tampered with.

In the cap 1 of Example 1, a cap with a diameter of 3 cm has tongue pieces 8 having a circumferential length L of about 5.5 mm (circumferential angle θ of about 21 degrees) at the bending position, and a gap M between the tongue pieces. They are about 3mm in diameter and are formed at equal intervals of 10 pieces, so they securely lock onto the bulge 6 when the cap is screwed on and unsealed.Also, after the cap 1 is removed from the mold, the tongue piece can be bent. Adjacent tongue pieces do not overlap even when doing so.

In the figure, 10 and 11 are screws, and 12 is a packing.

FIG. 4 shows a second embodiment of the pilfer-proof cap 11 of the present invention, and this cap 21 has the following features:
Similar to the cap of Embodiment 1, a heel portion 29 formed on the circumferential surface of the tongue piece 28 on the bottle mouth side engages with the lower circumferential surface of the bulging portion of the bottle mouth.

The diameter of the cap 21 of this embodiment 2 is 3 cm like the cap of embodiment 1, but as shown in FIG. is large at approximately 16.5 mm (the circumferential angle θ is approximately
63 degrees), the bulge 6 when screwing on the cap and opening the cap.
Although the gap M between the tongues is as small as about 1 mm, adjacent tongues do not overlap even when the tongues are bent after the cap 1 is removed from the mold.

[Brief explanation of drawings]

1 to 3 show a pilfer-proof cap according to a first embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is an enlarged view of the main part of FIG.
FIG. 4 is a bottom view of Embodiment 2 of the pilfer-proof cap of the present invention. 1,21...pilfer proof cap, 2
... Cap body, 3 ... Twistable part, 4 ...
Band part, 5... Bottle mouth, 6... Swelling part, 7... Lower peripheral surface, 8, 28... Tongue piece.

Claims (1)

[Scope of Claim for Utility Model Registration] A pilfer-proof cap in which a band part is integrally formed from the lower end of the cap body through a twistable part, and the cap is fixed to the lower peripheral surface of the bulge part of the bottle mouth. A plurality of tongue pieces that taper toward the tip are bent and connected from the lower end of the band, and the tongue pieces have flat inner and outer surfaces at their tip portions, and the tongue pieces are continuous with the flat tip portion. A heel portion is formed on the surface of the bottle spout side, and when the cap is attached to the bottle spout, the tip portion is sandwiched between the bulge portion of the bottle spout and the side wall of the cap, and the heel portion is placed under the bulge portion of the bottle spout. A cap that is installed so as to be locked on the circumferential surface, and the length of the circumferential direction at the bent position of the tongue is 3 mm or more, and the gap between adjacent tongues is 0.5 mm or more.