JPH0534148U - A cap with an unpacking function - Google Patents

Abstract

(57) [Summary] (Correction) [Structure] In a cap with a tamper-evidence band 6, an engaging portion 11 that engages with each other is provided on the inner surface of the cap top plate portion and the liner portion 3. It is rotatably held by the cap by the engagement of the portion 11. [Effect] Prior to breaking the sealing property between the cap and the container mouth when opening, the bridge part is surely broken and the tamper-evidence band is separated from the cap body to ensure TE
It can exert its function.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cap having a function of clearly indicating opening (hereinafter simply referred to as TE (tamper evidence)), and more specifically, a tamper-evidence band and The present invention relates to a cap having a TE function in which a bridge between cap bodies is broken.

[0002]

[Prior Art]

 BACKGROUND ART Conventionally, there is known a cap having a TE function capable of determining whether or not the cap has been once opened by a tamper evidence band. With this cap, it can be seen that once the cap is opened, the tamper-evident band is cut and divided from the cap body and opened at a glance.

Generally, in a cap that is opened by a screw, it is difficult to maintain the hermeticity of the cap only by fitting the screws provided on the container mouth and the inner surface of the cap, and in most caps, the container mouth is closed. The tip end of the cap and the inner surface of the top plate of the cap are sealed with a liner material, etc., to ensure the hermeticity. Also, when the inner plug is applied to the container mouth, the inner ring provided on the inner surface of the top plate of the cap is sealed with the inside of the container mouth of the inner plug to ensure the hermeticity.

[0004]

[Problems to be solved by the device]

 However, such a tamper-evidence band engages with the bead of the container and breaks the bridge portion when the cap is opened, so depending on the positional relationship between the tamper-evidence band and the bead of the container. , The bridge part will be broken when the cap moves a little upward from the start of cap turning.In such a case, before the bridge part is broken, the inner surface of the cap top plate and the container are broken. The sealability between the mouths will be destroyed first.

Therefore, when the rotation of the cap is stopped before the bridge is broken, the sealing property is peeled off because the sealing part is peeled off, but the appearance is not yet opened. There was a problem that it would be judged that.

In order to solve such a problem, an inner ring, which is provided on the inner surface of the cap top plate portion and is in contact with the inner surface side of the container mouth portion, is lengthened so that the bridge portion is formed before the sealability is broken. Although it may be possible to break it, it is difficult to secure a stable sealing property due to the change with time of the resin, and a new problem that powder is generated in the sealing part due to repeated opening and closing. Will occur. It is also possible to provide an inner ring and an annular seal part at the outer peripheral part with the tip of the container mouth, but in such a case, it is necessary that the inner plug is fitted firmly. However, there is also the problem that the shape and size of the hole of the inside plug are limited.

Therefore, an object of the present invention is to prevent the above-mentioned problems from occurring, and to prevent the sealability between the cap and the container opening portion from being broken at the time of opening, and to ensure that the bridge portion is ruptured and the tamper evidence. The band is divided from the cap body to provide a cap that can reliably perform the TE function.

[0008]

[Means for Solving the Problems]

 According to the present invention, a tamper-evidence band, which is composed of a top plate portion and a skirt portion, is provided below the skirt portion and is rupturable through the bridge portion, and is provided at the container mouth portion inside the skirt portion. In a cap including a cap shell portion provided with a screw portion that engages with the screw portion and a liner provided on the inner surface of the top plate portion so as to be in close contact with the tip of the container mouth, the inner surface of the cap top plate portion and the liner are mutually engaged. A cap is provided in which a mating engaging portion is provided, and the liner is pivotally held by the cap by engagement of the engaging portion.

[0009]

[Work]

 In the cap of the present invention, it is an important feature that the liner is pivotably held by the cap shell portion. As a result, when the cap shell is opened and the cap shell portion moves upward, even if the engagement portion of the liner with the cap shell portion starts to move upward together with the cap shell portion, Due to the reduced pressure inside the container, the seal does not peel unless the cap is opened further, and the bridge of the tamper-evidence band always breaks before the seal is peeled. .. Therefore, even if the container is not opened from the outside, the problem that the sealing property inside the container is not maintained does not occur, and the function of guaranteeing the contents can be surely provided.

[0010]

【Example】

 An embodiment of the present invention will be described with reference to the accompanying drawings. In FIG. 1, which is a cross-sectional view of an example of the cap of the present invention, the left half is a diagram showing a state before opening, and the right half is a diagram showing a state after the bridge portion is broken after the opening is started. The cap, generally designated by 1, comprises a cap shell 2 and a liner 3, and a tamper-evidence band 6 is provided below a skirt portion 4 of the cap shell 2 via a bridge 5. The tamper-evidence band 6 is provided with an engagement ring 9 that engages with the bead portion 8 of the container mouth portion 7 when opened. The tamper-evidence band 6 has a bead portion 8 and an engagement ring 9. Due to the engagement, the cap is not further moved and is broken at the bridge portion 5 and is divided from the cap body to show the TE property.

An engaging portion 11 for engaging with the liner is provided in the central portion of the top plate portion 10 of the cap shell 2. The engaging portion 11 shown in FIG. 1 is composed of a protrusion 12 having a large diameter downward. The liner 3 is large enough to cover almost the entire top plate portion 10 of the cap shell 2 and is rotatably held by the cap shell top plate portion 10 and can be peeled off from the container mouth front end 14, but relatively. It is firmly attached. In addition, a dome portion 15 that does not contact the top plate portion 10 is provided in the central portion thereof, and a circumferential wall 16 is provided in the center of the dome portion 15 so that the engaging portion 11 of the cap shell can be fitted therein. An inlet portion of the peripheral wall is formed with a ridge 17 which is provided and is engaged with the protrusion 12 of the engaging portion 11.

When opening the cap, when the cap starts to rotate, the tamper-evidence band 6 is accompanied by the upward movement of the cap, but the engagement ring 9 of the tamper-evidence band is attached to the bead portion 8 of the container mouth 7. Since the tamper-evidence band 6 cannot move upward any more because it engages with the above-mentioned portion, the bridge portion 5 receives stress from both upper and lower sides and is broken. At this time, the liner 3 is held by the cap shell 2 at the central portion because the engaging portion 11 of the cap shell 2 is engaged with the ridge 17 of the liner, and at the peripheral portion 13, the inside of the container is depressurized. Because of the state, it is held in close contact with the tip 14 of the container mouth. Therefore, the sealing property in the container is still maintained when the bridge portion 5 is broken. When the stopper is further opened, the peripheral edge portion 13 of the liner is separated from the tip 14 of the container mouth portion and moves together with the cap shell.

In FIG. 2 for explaining another embodiment of the present invention, in this embodiment, the liner is formed by injecting or stamping resin into the cap shell. Basically, the engaging portion 11 that engages with the liner is provided at the center of the cap shell, and the bridge portion is broken before the liner is peeled from the container opening portion. Is shown. In this embodiment, by providing the score 18 at the center of the liner, the upward movement of the liner due to the opening can be absorbed by the bending of the score part, and the peeling of the seal part can be delayed.

In the present invention, in addition to the engaging structure described above, as shown in FIG. 3, for example, a recess 19 with an undercut is provided in the cap shell, and a liner 3 is formed by injecting or stamping resin into the cap shell. Even if formed, the same effect can be obtained. In FIG. 3, an annular concave-convex portion 20 is provided in a portion between the engaging portion 11 on the inner surface of the top plate portion of the cap shell and the contact portion with the container mouth portion 14. When liner molding is performed by injecting or embossing resin on the inner surface of the top plate of the cap shell provided with the ring-shaped uneven portion 20, the surface area of the liner increases due to the presence of the uneven portion, thereby increasing the vertical extension of the liner. Therefore, it is possible to further increase the above effects.

As the cap shell, a conventionally known cap shell can be used except that the engaging portion is provided on the inner surface of the top plate portion. Also, the liner may be formed by first forming the liner and installing it in the cap shell, or as described above, it may be formed by injecting resin into the cap shell and stamping it. It can be selected as appropriate.

The cap shell material used in the present invention is not limited to this, but it is preferable to use, for example, polypropylene, polyethylene or the like. As the liner material, a conventionally known liner material such as polyethylene can be used. However, when injection molding or embossing is performed in the cap shell, it is necessary to have a relationship of easy peelability with the cap shell material. Is.

[0017]

[Effect of the device]

 According to the present invention, prior to the breakage of the cap and the seal portion of the container mouth at the time of opening, the bridge part is surely broken and the tamper-evidence band is separated from the cap body to surely exert the TE function. A cap can be provided. Further, in the present invention, not only the structure of the cap alone but also the combination with the inner stopper fitted to the container opening portion can achieve the same effect. The cap of the present invention is particularly suitable as a cap whose contents become a depressurized state after being stoppered by hot filling or retort sterilization such as natural fruit juice.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a cross-sectional view showing another aspect of the present invention.

[Explanation of sign]

 1 Cap 2 Cap Shell 3 Liner 5 Bridge 6 Tamper Evidence Band 7 Container Mouth 8 Bead 11 Engagement 12 Protrusion

Claims (3)

[Scope of utility model registration request] 1. A tamper-evidence band comprising a top plate portion and a skirt portion, which is rupturable through a bridge portion below the skirt portion, and a screw portion provided at the container mouth portion on the inner surface of the skirt portion. A cap including a cap shell portion provided with an engaging screw portion and a liner portion provided on the inner surface of the top plate portion so as to be in close contact with the tip of the container mouth portion. The inner surface of the cap top plate portion and the liner are engaged with each other. An engaging portion is provided, and the liner is rotatably held by the cap by engagement of the engaging portion. 2. The engaging portion on the inner surface of the cap top plate portion is provided as a protrusion having an engaging portion at the center of the inner surface of the cap top plate portion, and the liner has a size over the entire inner surface of the cap top plate portion, and at the center thereof. The cap according to claim 1, wherein the projection is provided with an engaging portion that engages with the projection. 3. The engaging portion on the inner surface of the cap top plate portion is provided as a convex portion or a concave portion having an undercut in the center of the inner surface of the cap top plate portion, and the liner is formed by injecting resin onto the inner surface of the cap top plate portion or embossing. The cap according to claim 1, which is formed so as to be separable from the inner surface of the cap top plate portion.