JPH08156954A - Pilfer-proof cap - Google Patents

Abstract

PURPOSE: To provide a pilfer-proof cap which retains air-tightness well even under a negative pressure, of which the sealing is automatically released accompanying with the unsealing of a cap, and in addition, by which an air tightness leakage generating condition can be assuredly judged by a method wherein an effective sealing-fitting depth of a seal packing to a mouth part of a bottle under a sealed condition has to satisfy specified conditions. CONSTITUTION: In order to seal a mouth part (1b), an internal leg 21 which extends downward from a ceiling wall 3a of a cap main body part 3 and is fitted in the inner periphery of the mouth part (1b) of a bottle 1 is provided. Then, a sealing packing 22 which is tightly fitted in the inner periphery of the mouth part (1b) is provided on the outer periphery of the internal leg 21. The effective sealing-fitting depth (a) of the seal packing 22 into the mouth part (1b) of the bottle 1 under a sealed condition satisfies a>=(α/360).b (note: αis an unscrewing angle when a cutting off part is cut off, (b) is a lead of the thread). Therefore, the sealed condition of the mouth part (1b) can be sufficiently kept until the effective sealing-fitting depth (a) becomes 0, and a cutting off generates at a cutting off part 5 when the effective depth becomes 0 or earlier than that.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pill fur proof cap, and is used for sealing a bottle, such as a soft drink, which is filled after heat sterilization or heat sterilized after filling, in a sealed state. And a suitable pill fur proof cap.

[0002]

2. Description of the Related Art Bottles that are heat-sterilized and then filled, such as soft drinks, or heat-sterilized and then filled, are sealed with a cap to cool the inner solution.
Negative pressure is generated inside. Therefore, even if the airtight leakage occurs even a little, the outside air is inhaled, and various bacteria enter and spoil, which is a food hygiene problem.

[0003] Therefore, it is necessary to ensure sufficient airtightness and to be able to reliably discriminate when airtightness is lost.

Therefore, conventionally, a metal screw cap with a pill fur proof band, which is commonly found in PET bottles, has been widely adopted. Utilizing the fact that the screw cap is made of metal and has high rigidity, the inner surface of the ceiling wall is utilized. When the seal packing provided on the side of the bottle has a sealing state that strongly presses against the top surface of the mouth of the bottle, and when this is opened to the extent that airtight leakage occurs, the space between the pill fur proof band and the cap body part It is possible to discriminate that an airtight leak has occurred due to disconnection at the disconnection section composed of discontinuous slits.

On the other hand, Japanese Utility Model Publication No. 47-22909 discloses that
Discloses a crown with a long peripheral wall that seals the bottle mouth,
It is made of synthetic resin and has a seal part that fits inside the mouth of the bottle and a cap body that fits around the mouth, and the protrusion provided on the inner circumference of the cap body is on the outer surface of the bottle mouth. By fitting in the formed groove, the sealed state can be firmly maintained. When opening the cap, after cutting off most of the peripheral wall along the parting line, lift the knob and open the cap.

[0006]

In the conventional metal screw cap with the pill fur proof band, the pill fur proof band is naturally disconnected when the pill fur proof band is opened, which does not inconvenience the opening. , The cap after detaching can be opened and closed easily with a screw and is easy to use. However, a sharp edge is created at the cut end of the separated pill fur proof band, and the discontinuous part of the discontinuous slit that forms the cut part of the cap and pill fur proof band is torn off to form a sharp protrusion, so these Sometimes I get caught in an injury and get injured.

In addition, the one described in the above-mentioned publication cited as the prior art of the cap having a long peripheral wall has the following features:
In addition to this, it is necessary to remove most of the peripheral wall, so it is difficult to use. In addition, since the strong fitting of the groove of the protrusion is used, opening and closing by lifting the knob is not difficult.

An object of the present invention is to solve the above-mentioned problems, to maintain good airtightness even under a negative pressure, the sealing is automatically released when the cap is opened, and the airtightness leakage occurs. The main purpose is to provide a pill fur proof cap that can be surely identified.

[0009]

The pill fur proof cap of the present invention has the following objects and advantages.
A cap main body having a threaded portion that covers the mouth of the bottle and seals the mouth by screwing with the mouth, and extends downward from the cap main body and engages with a locking step on the outer surface of the mouth. The pill fur proof band part that has a locking part to prevent it from coming off is integrally molded with synthetic resin, and the discontinuous slit and the boundary part between the cap body part and the pill fur proof band part are separated by pulling between them. A detachable part consisting of a score etc. is provided, and a middle leg that extends downward from the ceiling wall of the cap body part and is fitted into the inner periphery of the mouth of the bottle is provided, and the outer periphery of this middle leg is closely fitted to the inner periphery of the mouth of the bottle. A seal packing is provided, and the effective tight fitting depth a of the seal packing to the mouth of the bottle in the above-mentioned closed state is a ≧ (α / 360) · b where α: screw return when the separation part is cut Angle a: Effective close-fitting depth b: Main feature is that the lead of the screw is satisfied.

[0010] It is preferable that a seal packing is provided at a portion of the ceiling wall of the cap body portion facing the rim of the bottle, and the seal packing is pressure-bonded to the rim in the sealed state.

[0011]

In the above-mentioned structure which is the main feature of the pill fur proof cap of the present invention, the cap body is screwed onto the mouth while the pill fur proof band is put on the mouth of the bottle prior to the cap body. By the continuous and simple operation, the pilfer proof band part which continues below the cap body part is formed at the same time that the middle foot is fitted into the mouth part and the seal packing of the middle foot part is in the closed state in which the effective close fitting depth is a. The locking portion provided on the inner surface engages with the locking step portion on the outer surface of the mouth portion in a retaining state so that the cap body cannot be opened without the disconnection at the disconnecting portion. However, when the cap body is opened, the cap body is naturally separated from the pill fur proof band and no special work is required for this. It is convenient to use since it opened and closed easily without regard to screw the fur proof band portion. Also, since the whole is made of synthetic resin and no sharp edge is generated even when the cut-off portion is cut off, injury is eliminated.

Moreover, the effective close-fitting depth a satisfies the following: a ≧ (α / 360) · b where α: screw return angle when the cut-off portion is cut a: effective close-fitting depth b: screw lead Since it is made of synthetic resin and is convenient to use, the sealed state of the mouth can be sufficiently maintained until the effective close fitting depth a becomes 0, and the effective depth becomes 0. Or, since the disconnection occurs at the disconnection part earlier than that, it may happen that the cap body does not reach the opened state due to fraud or mischief, the airtightness leaks, or it is opened in a state close to this. Even if there is, this can be easily identified.

In the structure in which the seal packing which is pressed against the mouth edge of the bottle in the ceiling wall of the cap body portion in the sealed state is provided, the mouth portion is double sealed inside and outside. Therefore, the sealing property is further improved.

[0014]

EXAMPLES The pill fur proof cap of the present invention will be described below with reference to some examples.

The inner closing and sealing screw cap A of the first embodiment shown in FIGS. 1 to 3 is applied to a bottle 1 made of various materials such as resin such as PET or glass.

As shown in FIG. 1, the cap A according to the present embodiment covers a mouth portion 1b of a bottle 1 and a screw portion for sealing the mouth portion 1b by screwing with a screw portion 1c provided on the outer periphery thereof. A cap body 3 having 2 and a pill fur proof band 4 extending downward from the cap body 3 and covering the outer periphery of the mouth 1b of the bottle 1 are integrally formed of synthetic resin.

In order to seal the mouth 1b, the mouth 1 of the bottle 1 extends downward from the ceiling wall 3a of the cap body 3.
b The inner foot 21 to be fitted on the inner circumference is provided.
A seal packing 22 that is tightly fitted to the inner circumference of the mouth portion 1b of the bottle 1 is provided on the outer circumference of the bottle 1. The effective tight fitting depth a shown in FIG. 1 to the mouth portion 1b of the bottle 1 in the sealed state of the seal packing 22 is shown. Is a ≧ (α / 360) · b where α: screw return angle when the cut-off portion is cut a: effective tight fitting depth b: screw lead is satisfied.

Further, in this embodiment, a seal packing 23 is provided at the portion of the ceiling wall 3a of the cap body 3 facing the rim 1d of the bottle 1 so as to be pressed against the rim 1d in the sealed state.

At the boundary between the cap body portion 3 and the pill fur proof band portion 4, there is provided a first detaching portion 5 composed of a discontinuous slit which is separated by pulling between the two. Inner circumference first
At the position lower than the separating portion 5 of the bottle, the mouth portion 1b of the bottle 1 is
A locking portion 7 that is engaged with the locking step portion 6 on the outer surface of the above and locks the pill fur proof band portion 4 at the corresponding sealing position is integrally formed.

In such a cap A, the pill fur proof band portion 4 precedes the cap body portion 3 and the bottle 1
As shown in FIG. 1, the middle foot 21 is fitted into the mouth portion 1b by a simple and continuous operation of screwing the cap main body portion 3 onto the mouth portion 1b while covering the mouth portion 1b with the seal packing. At the same time that 22 is in the closed state where the effective close-fitting depth is a, the locking portion 7 provided on the inner surface of the pill fur proof band portion 4 continuing below the cap body portion 3 locks the outer surface of the mouth portion 1b. The cap body 3 can be brought into a closed state in which the cap body 3 cannot be unsealed without engaging with the step portion 6 and the disconnection portion 5 and the cap body 3 is unsealed. As shown in FIG. 4, the cap body 3 is naturally separated from the pill fur proof band portion 4 without any special work for this, and the cap body portion 3 after the separation is screw type regardless of the pill fur proof band portion 4. Can be easily opened and closed Because it is convenient to use. Further, since the whole is made of synthetic resin, and the cutting portion 5 does not have a sharp edge even after cutting, injury can be eliminated and safety of use can be achieved.

Moreover, the effective close-fitting depth a satisfies the following: a ≧ (α / 360) · b where α: screw return angle when the cut portion is cut a: effective close-fitting depth b: lead of screw Since it is made of synthetic resin and convenient to use, the hermetically sealed state of the mouth portion 1b can be sufficiently maintained until the effective close fitting depth a becomes 0, and the effective depth becomes 0. Or, earlier than that, the detachment section 5
If the cap body 3 does not reach the opened state due to fraud or mischief, or the airtightness leaks or is close to this, it can be easily identified. Therefore, hygienic safety can be achieved.

In addition to this, in this embodiment, the mouth portion 1b is double sealed inside and outside together with the seal packing 23 of the ceiling wall 3a portion of the cap body portion 3, so that the sealing property is further improved.

As shown in phantom in FIG. 2, the pill fur proof band portion 4 is formed in a long skirt shape covering the necessary area of the long neck 1a of the bottle 1, so that the cork stopper of a neck-long bottle such as a wine bottle is formed. It is possible to obtain an appearance similar to the closed state by. In addition, various decorations and indications can be made using the pill fur proof band section 4 by selecting many methods such as label sticking and printing, coloring and molding.

As shown in FIGS. 1 and 2, the cap body 3
On the outer peripheral surface of the, there is integrally formed an unevenness 9 called knurling or serration for slip prevention.

The first separating portion 5 may be a so-called score having a groove-shaped cut.

The locking step portion 6 is formed by the bead 11 provided on the outer surface near the boundary between the mouth portion 1b and the neck portion 1a, but it need not be continuous in an annular shape, and how it is provided. May be.

After being integrally molded with the pill fur proof band portion 4, the engaging portion 7 is changed in direction from the downward posture shown by the phantom line in FIG. 1 to the upward posture shown by the solid line in FIG. 1 as shown by the arrow. 3 is a shape-locking member, which facilitates the direction change in a thin-walled state with a pleated shape as shown in FIG. 3 and has high tensile resistance with the locking step 6 in the engaged state. The pill fur proof band portion 4 can be securely locked when the cap body portion 3 is opened. Needless to say, however, the locking portion may be formed in any manner as long as the purpose can be achieved. In some cases, a separate body may be fitted.
Further, it goes without saying that the seal packing 22 may be formed integrally with the middle foot 21.

FIG. 4 shows a second embodiment of the present invention. The inner closing and sealing screw cap B of this embodiment is almost the same as that of the first embodiment, except that the long pill fur proof band portion 4 is provided with a first disconnection from the lower end of the long pill fur proof band portion 4 as in the first embodiment. Second vertical cut-off section 1 leading to section 5
2 and that the seal packing 23 of the first embodiment is omitted.

Although the second separating portion 5 of this embodiment is used as a score, it is needless to say that it may be a discontinuous slit.

When the second detaching portion 12 is provided in this manner, like the first embodiment, the cap body portion 3 is set so that the cutting of the detaching portion occurs before the leakage of confidentiality. Alternatively, the pill fur proof band portion 4 separated from the cap body portion 3 by removal is
As shown in FIG. 2 of the first embodiment, the bottle 1 is not covered alone around the neck portion 1a, but the vertically oriented second disconnecting portion 12 provided on the bottle 1 is also disconnected. The cap body 3 can be easily and integrally removed from the neck portion 1b of the bottle 1b, which is convenient for collecting and reusing the bottle 1.

In this case, the upper end of the second separating portion 12 is continuous with the slit portion 5a of the first separating portion 5, and the cap body portion 3 and the pill fur proof band portion 4 are located between the slit portions 5a. It is adjacent to a portion, that is, a discontinuous portion slightly larger than a narrow bridge, that is, a portion connected by a wide uncut bridge 5b.

Therefore, in the initial stage of opening the cap body 3 and disconnecting the first disconnecting portion 5, the disconnecting at the bridge 5b is delayed compared to other portions. As a result, the pill fur proof band portion 4 receives a pulling force in the direction indicated by the arrow in an attempt to follow the rotation and the upward movement of the cap body portion 3 caused by the opening and the upward movement of the cap body portion 3, so that the second separating portion Since 12 is naturally separated by the opening of the cap body 3 and is integrally removed,
There is no need to separate the pill fur proof band portion 4 for reuse.

FIG. 5 shows a third embodiment of the present invention. The pill fur proof cap C of this embodiment has a second
Is almost the same as that of the first embodiment, but the locking portion 7 is the stretched pill fur proof band portion 4, which is the bottle 1.
As shown in the figure, the locking step portion 6 is tightly adhered to the neck 1a of the user by heat shrinking as shown in the figure.
However, it is easy to form the locking portion 7.

Further, the second separating portion 12 provided in the pill fur proof band portion 4 of the present embodiment employs a discontinuous slit, but the effect obtained by this is that of the second embodiment. Does not change.

[0035]

The main features of the pill fur proof cap of the present invention are:
At the same time when the middle foot is fitted into the mouth portion and the seal packing of the middle foot is in the sealed state where the effective tight fitting depth is a, at the same time, the locking portion provided on the inner surface of the pill fur proof band portion that continues below the cap body portion is It is possible to bring the cap main body into a closed state in which the cap body cannot be opened without engaging with the locking stepped portion on the outer surface of the mouth portion in a retaining state and without disconnecting at the disconnecting portion,
Since the cap body is naturally separated from the pill fur proof band when the cap is opened, no special work is required for this purpose, and the cap body after separation is independent of the pill fur proof band. It is convenient to use as it can be opened and closed easily with a screw. Further, since the whole of the separating portion is made of synthetic resin, no sharp edge is generated even when the separating portion is cut off, so that it is possible to prevent injury and to improve safety in use.

Moreover, since the effective close-fitting depth a satisfies the predetermined condition, it is made of synthetic resin and is convenient for use, but the effective close-fitting depth a becomes zero until the effective close-fit depth a becomes zero. The sealed state of the part can be sufficiently maintained, and the effective depth becomes 0, or the disconnection part is disconnected earlier than that, so the cap body will not be opened due to fraud or mischief. Even if the airtightness leaks, or even if it is opened to a state close to this, this can be easily discriminated and safety in hygiene can be achieved.

In the structure in which the seal packing for crimping to the rim in the sealed state is provided in the portion of the ceiling wall of the cap main body facing the rim of the bottle, the mouth is doubly sealed inside and outside. It is possible to improve the sealing property.

[Brief description of drawings]

FIG. 1 is a side view of a hermetically sealed state in which a half portion of a cap according to a first embodiment of the present invention is shown in section.

FIG. 2 is a perspective view showing a state where the cap of FIG. 1 is opened.

FIG. 3 is a partial perspective view showing a state of a locking portion of the cap of FIG.

FIG. 4 is a side view in a hermetically sealed state showing a half portion of a cap as a second embodiment of the present invention in section.

FIG. 5 is a side view of a hermetically sealed state in which a half portion of a cap as a third embodiment of the present invention is shown in section.

[Explanation of symbols]

 A to C Pilfer proof cap 1 Bottle 1b Mouth portion 1c Screw portion 2 Screw portion 3 Cap body portion 4 Pilfer proof band portion 5 Separation portion 6 Locking step portion 7 Locking portion 21 Middle foot 22 Seal packing 23 Seal packing

Claims (2)

[Claims] 1. A cap main body having a screw portion which covers a mouth of a bottle and seals the mouth by screwing the mouth, and a locking step portion extending downward from the cap main body and on an outer surface of the mouth. A pill fur proof band portion having a locking portion that engages with the pill fur proof band portion is integrally molded with synthetic resin, and is separated at the boundary between the cap body portion and the pill fur proof band portion by pulling between them. A separation part consisting of continuous slits, scores, etc. is provided, and a middle leg that extends downward from the ceiling wall of the cap main body and is fitted into the inner periphery of the mouth of the bottle is provided. A seal packing tightly fitted to the circumference is provided, and the effective tight fitting depth a of the seal packing to the mouth portion of the bottle in the sealed state is a ≧ (α / 360) · b where α: the cut portion is cut Kinoneji back angle a: effective closely fitted Depth b: pilfer-proof cap, characterized in that to satisfy the screw lead. 2. The pill fur proof cap according to claim 1, wherein a seal packing is provided at a portion of the ceiling wall of the cap main body portion facing the rim of the bottle, the seal packing being pressed against the rim in the sealed state.