JP4355150B2 - Plastic cap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin cap that can be attached to a container mouth by a stopper, has resealability, and has a tamper-proof property that allows one-touch opening after reseal.
[0002]
[Prior art]
Conventionally, as a cap having both tamper resistance and resealability, a screw provided with a tamper evidence band (hereinafter referred to as a TE band) via a weakened portion at the lower end of a skirt wall having a screw formed on the inner peripheral surface Caps are common and widely adopted. This cap has many advantages, but on the other hand, it is necessary to turn the cap one or more times for opening and closing, and it lacks one-touch opening and closing, and it is predetermined to break the TE band when opening. The above torque is required and difficult to open. (3) It is difficult to ensure the timing of TE band break and container seal break. (4) Screw cap has high sealing performance even after resealing. When the contents are spoiled after resealing, the internal pressure increases, and there is a problem that a lid skipping phenomenon (so-called blow-off) may occur at the time of opening.
[0003]
On the other hand, various types of stopper caps having a TE band have been proposed (see, for example, Patent Documents 1 to 4). In any of these, the problem of the above (3) does not occur by opening the TE band after breaking and removing the TE band separately from the opening operation. In No. 4, the slits in the vertical direction are formed in the skirt wall, so that the problems (2) and (4) are solved. The problem of ▼ can be solved.
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 6-80661 [Patent Document 2]
Japanese Patent Laid-Open No. 11-292112 [Patent Document 3]
Japanese Patent No. 3357464 [Patent Document 4]
Japanese Patent Laid-Open No. 10-245052
[Problems to be solved by the invention]
Each of the conventional stopper caps described in Patent Documents 1 to 4 can solve all or part of the above problems, but in each case, the TE band is formed integrally with the container body through the weakened portion. For example, the TE band part is made of a highly rigid material to enhance the function of the TE band, and the cap body is made of a material that is elastic and has excellent detachability and sealability. It was not possible to select the material of the cap body and the TE band, for example, by changing the color of the resin in order to enhance the aesthetic effect. In the conventional proposal, a TE band is formed by providing a peelable ring on the outer periphery of the skirt wall or by providing a peelable ring on the lower end of the skirt wall. For this reason, it is possible to directly contact the skirt wall of the cap body from the outside, leaving a room for possibility of mischief, and the tamper evidence is not yet satisfied.
[0006]
The present invention is a further improvement of the conventional cap proposed above, and is capable of opening and closing, one-touch opening and closing after resealing, no risk of blow-off phenomenon in the container after resealing, and TE band. It can be made of a material different from that of the cap body, and has a tamper-evident design with a ring wall that fits the outer periphery of the skirt wall and a TE ring that engages the lower end of the skirt wall, making it a more sophisticated tamper. The purpose of the present invention is to provide a cap having a tamper-proof cap capable of securing evidence and sealing properties and having excellent decorativeness.
[0007]
[Means for Solving the Problems]
The synthetic resin cap of the present invention that solves the above problems includes a cap body having a top wall and a skirt wall that engages with the outer peripheral portion of the container mouth, and a ring-shaped cover cap that presses against the outer peripheral surface of the skirt wall of the cap body The cover cap comprises an outer ring that presses against the outer peripheral surface of the skirt wall of the cap body, and a tamper-evident ring that is connected to the lower end of the outer ring via a weakened portion, and is tearable to the outer ring. A longitudinal weakened portion is formed.
[0008]
The cover cap is formed separately from the cap body, and the outer ring and the cap body are engaged with each other by an engaging portion, so that the cover cap can be formed of a material different from that of the cap body. A material suitable for each function can be selected. It is desirable that the tamper evidence ring is engaged with the inner peripheral surface of the lower end of the skirt wall by winding the lower end of the skirt wall of the cap body. Further, the cover cap covers the entire outer peripheral surface of the skirt wall of the cap body, so that a finger cannot be directly placed on the outer peripheral surface of the skirt wall in an unopened state, thereby ensuring a higher level of tamper evidence. This is desirable. Then, by forming a plurality of slits reaching the lower end of the skirt wall in the vertical direction on the skirt wall of the cap body, opening and opening can be easily performed. In addition, by forming a plurality of slits reaching the lower end of the skirt wall, the sealing force is weak against the increase in internal pressure, so even if the contents rot after resealing, the gas does not leak out and the internal pressure of the container does not increase, There is no risk of a cover jumping accident due to an increase in internal pressure that could occur in the case of a screw cap, and it is safe.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a cap according to the present invention will be described in detail with reference to the drawings.
1 is a cross-sectional front view of a state in which a cap according to an embodiment of the present invention is mounted on a container mouth, FIG. 2 is a plan view thereof, and FIG. 3 is a cross-sectional view thereof.
[0010]
The cap 1 of the present embodiment is composed of two pieces, a cap body 2 and a cover cap 3, as clearly shown in the sectional view of FIG. Therefore, the cap body 2 and the cover cap 3 may be formed of the same material or different materials, so that the cap body 2 and the cover cap 3 can be appropriately selected according to the use and function, and the colors thereof are the same or different colors. By selecting things, you can have a variety of designs. The cap body 2 is composed of a top wall 5 and a skirt wall 6 and an inner ring 7 that are provided so as to hang from the top wall. The top wall 5 is formed to have a diameter larger than that of the skirt wall 6 and is used for opening. Finger grip is improved. On the upper peripheral edge of the outer periphery of the top wall 5 is formed an engaging protrusion 9 that engages with an engaging protrusion formed on the upper end of the outer ring of the cover cap 3 to be described later. The skirt wall 6 is formed with an annular engagement protrusion 8 for engaging with an engagement jaw 32 formed at the container mouth. A plurality of vertical slits 14 are formed in the skirt wall 6 at a predetermined interval from the lower end to a position exceeding at least the engagement protrusion 8. By forming the vertical slit 14 in the skirt wall, the cap body can be easily detached from the container.
[0011]
On the other hand, the cover cap 3 is formed at a height that covers the entire longitudinal peripheral wall of the cap body 2, and is formed with an outer peripheral ring 10 that presses against the skirt wall 6 and a lower end of the outer peripheral ring via a weakening portion 11 such as a bridge. The TE ring 12 is provided. Note that the weakened portion 11 can also be formed from a score obtained by reducing the thickness. In the present embodiment, as shown in FIG. 3, the upper end of the outer peripheral ring 10 extends outward so as to cover the outer peripheral edge of the top wall 5 formed to be larger in diameter than the skirt wall, and the top end is covered with the top. Engagement projections 13 are formed so as to fit into engagement projections 9 formed on the outer peripheral edge of the wall. Further, as clearly shown in FIG. 1, the outer peripheral ring 10 of the cover cap 3 is formed with a weakening portion 15 such as a score that can be torn in the vertical direction from the lower end of the outer peripheral ring to the upper end of the engaging convex portion 13. A sub-weakening portion 17 is formed in the engaging portion so as to form a tab 16 that becomes a knob at the time of opening at a predetermined interval from one side (left rotation direction in the figure). The tab 16 is formed with a ridge 18 on the outer periphery over a predetermined width so that it can be easily picked.
[0012]
The TE ring 12 is bent at a substantially right angle to the lower end of the outer ring 10 via a weakened part 11 such as a bridge so as to be in contact with the lower end of the outer ring. The outer peripheral ring is formed to engage with the inner peripheral surface of the lower end portion. Accordingly, the skirt wall 6 and the outer peripheral edge of the cap body 2 are covered with the cover cap 3, and unless the cover cap 3 is removed, the skirt wall 6 of the cap body cannot be directly touched in the unopened state. It cannot be lifted by picking only the main body, and is highly tamper-proof.
[0013]
The cap 1 of the present embodiment is configured as described above, and in order to attach the cap 1 to the container body 30 filled with the contents, the skirt wall 6 is elastically expanded by being stoppered by a capper, and the skirt wall The engaging projection 8 formed on the bottom of the container enters the engaging jaw 32 formed on the container mouth, and the cap is locked. In that state, the inner ring 7 of the cap is sealed by being pressed against the inner peripheral surface of the container mouth, and is also sealed by contact between the top of the container mouth and the inner surface of the cap top wall, and the skirt wall and the outer peripheral surface of the mouth. Therefore, high sealing performance can be secured.
[0014]
When the cap 1 is attached to the container mouth, the skirt wall 6 of the cap body is covered from the outside by the outer peripheral ring 10 of the cover cap 3 and has a double wall structure, so the skirt wall 6 is difficult to spread outward. Even if opening is attempted, the engaging protrusion 8 cannot be pulled out of the engaging jaw 32 and cannot be opened. Therefore, since this cap cannot be opened unless the outer peripheral ring 10 is broken and the restraint of the outer peripheral portion of the skirt wall is released, whether or not the tapping has been opened by checking whether the skirt wall is broken or not is confirmed. And has a tamper-proof function. Until the cover cap is removed, the double wall structure can ensure high sealing performance, and the cap sealing performance cannot be destroyed unless the cap body is lifted. The timing of breakage of the TE ring and the timing of the seal break does not become a problem, and the tamper evidence can be surely achieved.
[0015]
When opening the plug, the tab 16 projecting from the outer periphery of the top wall of the cap body is pulled to the upper end of the outer ring 10 to break the weakened portion 15 and further pulled in the circumferential direction as shown by the phantom line in FIG. Thus, the weakened portion 11 connecting the outer ring 10 and the TE ring 12 is broken over the entire circumference, and the outer ring 10 can be removed. As shown in FIG. 4, the TE ring 12 separated from the outer peripheral ring 10 falls and is caught by the flange 33 of the container and remains in the container mouth as it is. Therefore, in that state, it is noticeable that the TE ring is left unnaturally in the container mouth, so that it is immediately known that it has been opened, and there is no outer ring and the TE ring remains. It can be said that it has the tamper evidence property.
[0016]
In this state, the outer peripheral surface of the skirt wall 6 is not constrained by the outer peripheral ring 10, and the vertical slits 14 are formed in the skirt wall 6 at predetermined intervals, so that the skirt wall 6 can easily spread to the outside. Yes. Therefore, by lifting the outer peripheral portion of the top wall protruding from the skirt wall of the cap body, the skirt wall is elastically deformed so that the engagement projection 8 easily gets over the engagement jaw 32 of the container, and the cap body is removed from the container mouth. It can be easily removed and opened.
[0017]
Further, at the time of resealing, the cap 1 can be simply resealed with a relatively weak force by simply pressing down the cap 1 in accordance with the container mouth, and the one-touch opening and closing is excellent. In the closing after resealing, the locking force at the skirt wall is weak due to the longitudinal slit 14 on the outer peripheral surface of the skirt wall, and the sealing after resealing is an inner ring. weak. Therefore, even if the contents decay after resealing, the gas does not escape to the outside and the internal pressure of the container does not increase, and there is no risk of the cover jumping out due to an increase in internal pressure that may have occurred in the case of a screw cap. It is.
[0018]
As mentioned above, although embodiment of this invention was described, this invention is not restricted to the said embodiment, A various design change is possible within the range of the technical idea. For example, in the above embodiment, the TE ring is formed so as to remain on the neck of the container. However, a weakened portion in the vertical direction is also formed on the TE ring, and the TE ring can be easily removed after opening or when the container is discarded. Can also be made. Thereby, complete separation and disposal of the container body and the cap can be promoted. In addition, the material and shape of the container to which the cap of the present invention is applied are not limited, and a plastic container such as a PET container, a glass container, a metal container, a paper container, a pouch with a spout, etc. It is also applicable to. Furthermore, the container of the present invention is a simple resealable container that does not cause the above problems (1) to (4) by applying it to a container for drinking the liquid content directly from the container mouth, such as a small PET container. Obtainable.
[0019]
【The invention's effect】
As described above, according to the cap of the present invention, there is no fear of occurrence of blow-off phenomenon in the container after resealing, the one-touch opening / closing performance after resealing, and the container after resealing, and the cover cap and the cap body are formed of different materials. In addition, the tamper evidence is ensured by the double structure of the ring wall that fits the outer periphery of the skirt wall and the TE ring that engages the lower end of the skirt wall. It is possible to obtain a cap having a tamper-proof cap that can secure a denting property and a sealing property and is excellent in decorativeness. In particular, since the cap body and cover cap have a two-piece structure, the cap body and cover cap can be made of different materials, making it easy to balance the opening and sealing, and to have different colors. The design can be diversified.
[Brief description of the drawings]
FIG. 1 is a front view of a state in which a cap according to an embodiment of the present invention is attached to a container mouth portion.
FIG. 2 is a plan view thereof.
FIG. 3 is a front cross-sectional view of a state in which a cap according to an embodiment of the present invention is attached to a container mouth portion. FIG. 4 is a front view of a state in which an outer peripheral ring is removed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cap 2 Cap main body 3 Cover cap 5 Top wall 6 Skirt wall 7 Inner ring 8 Engagement protrusion 9 Engagement convex part 10 Outer ring 11 Weakening part 12 TE ring 13 Engagement convex part 14 Vertical slit 16 Tab 18 Projection line 20 Tip Part 30 container main body 31 mouth part 32 engaging jaw part 33 flange

Claims (2)

A cap body having a top wall and a skirt wall engaged with the outer peripheral portion of the container mouth, and a ring-shaped cover cap pressed against the outer peripheral surface of the skirt wall of the cap body, the cover cap comprising the skirt wall of the cap main body The outer ring is pressed against the outer circumferential surface and a tamper evidence ring connected to the lower end of the outer ring via a weakening portion, and a longitudinal weakening portion that can be torn to the outer circumferential ring is formed , the tamper evidence ring is The lower end of the skirt wall of the cap body is rolled into engagement with the inner peripheral surface of the lower end of the skirt wall, and the cover cap covers the entire outer peripheral surface of the skirt wall of the cap main body. A synthetic resin cap characterized in that the finger cannot be directly placed on the cap.   The synthetic resin cap according to claim 1, wherein the cover cap is formed separately from the cap body, and the outer ring and the cap body are engaged by an engaging portion.

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