JP4492768B2 - Tamper-evidence container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container having improved tamper evidence, which is a combination of a container body such as a plastic bottle or a pouch with a spout and a plastic cap having tamper evidence for closing the container body.
[0002]
[Prior art]
Conventionally, the container mouth of plastic bottles, pouches with spouts, etc. is sealed with a plastic cap having tamper-evidence, and the tamper-evidence band (hereinafter referred to as TE band) of the cap is bent on the inner peripheral surface or the lower part While forming a bent engagement piece such as a flexible wing, an engagement ring that engages with the bent engagement piece is formed by rotating a cap below the threaded portion of the container mouth when opening the cap. Sometimes, the upper end edge of the bending engagement piece engages with the engagement ring to give resistance to the rise of the TE band (for example, JP-A-3-53181), or the inner circumference of the TE band A ratchet-like engagement protrusion that provides resistance in the direction of opening the cap is formed on the surface, and a ratchet that engages the ratchet-like protrusion of the TE band at the container mouth There is a system that forms a cup-shaped protrusion and provides resistance to the rotation of the TE band by engaging the engagement protrusions of the cap and the container at the time of opening (for example, Japanese Utility Model Publication No. 51-54056). Are known.
[0003]
[Problems to be solved by the invention]
In order to reliably perform the tamper-evidence function in the screw-type cap, it is required that the bridge for connecting the TE band is cut off at the same time as the seal release or earlier than when the cap is opened. However, in the case of the conventional case, especially in the case of a cap with a small opening angle for releasing the seal, or in the former method in which the bridge is broken by preventing the TE band from moving upward, the rotation play angle of the TE band is compared. There is a risk that the seal will be released before the bridge breaks. In particular, in the case of containers filled with contents that are susceptible to spoilage and oxidative degradation, the presence of unauthorized opening will have a significant impact on quality assurance. The latter method solves the above-mentioned drawbacks, but still has a play angle in the rotational direction, and thus does not completely satisfy the above requirement.
[0004]
On the other hand, in the case of the conventional cap, since the TE band bending engagement piece and the engagement protrusion have to go over the part that stops the TE band from rising or rotating when closing, if the strength of the bridge is weakened, There is a drawback that the bridge breaks when closing. For this reason, the bridge must increase the bridge strength to such an extent that it does not break at the time of closing, which leads to an increase in the bridge breaking strength at the time of opening, which makes it difficult to open and reduces the tamper evidence. It has become.
[0005]
Therefore, the present invention is to solve the above-mentioned problems of a container in which a container mouth such as a conventional bottle or a pouch with a spout is sealed with a tamper-evidence plastic cap, and the container mouth is provided with tamper evidence. In the method of sealing with a plastic cap that has the property, it has a mechanism that breaks the bridge of the TE band at the same time as opening, tamper evidence performance can be further enhanced, and the cap can be easily attached with a stopper, and the bridge An object of the present invention is to provide a tamper-evidence container that can be easily opened and can have a low breaking strength.
[0006]
[Means for Solving the Problems]
A tamper-evidence container of the present invention that solves the above-mentioned problems has a tamper-evidence band integrally provided at the lower end of the skirt wall via a bridge , and has a female screw formed on the inner peripheral surface of the skirt wall And a tamper-evidence container comprising a container body having a container mouth portion formed with a screw thread threadedly engaged with the female screw of the cap on the outer peripheral surface, the tamper-evidence band of the cap One or more anti-rotation protrusions are formed on the inner peripheral surface, an engaging protrusion that engages with the anti-rotation protrusion is formed on the outer peripheral surface of the container mouth, and the anti-rotation protrusion is axial in the thread. The tamper-evidence is formed by engagement of the rotation-stop protrusion and the locking protrusion in a state where the cap is attached to the container mouth portion by a stopper. It is characterized in that so as to lock the bands unplugging direction unrotatable.
[0007]
The locking protrusion engages only with an annular protrusion having a fitting locking part into which the rotation stop protrusion of the TE band is fitted, or with an opening rotation direction side end of the rotation stop protrusion of the TE band. It can be formed as a locking projection. And this latching protrusion part may be formed in the downward direction of the screw thread of a container mouth part, and may be separated from a screw thread, and may be formed in the protrusion state which followed the screw thread. Further, if a slit is formed in the axial direction on the skirt wall of the cap, the plugging becomes easier.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. This embodiment has shown the case where it applies to the container which consists of a pouch with a spout so that it may show clearly in FIG. In the figure, reference numeral 1 denotes a pouch body (that is, a container body), and a container mouth 2 (spout) is fixed to the upper edge of the opening by a known means. A synthetic resin cap 10 having tamper evidence is screwed into the container mouth 2.
[0009]
The cap 10 is integrally provided with a TE band 15 via a bridge 13 at the lower end of the skirt wall 12 of the cap body 11. A female screw 14 is formed on the inner peripheral surface of the skirt wall 12 to be screwed with a screw formed on the outer peripheral surface of the container mouth portion 2. In this embodiment, four) anti-rotation protrusions 16 are formed to protrude at a predetermined interval.
[0010]
On the other hand, a screw thread 4 is formed on the outer peripheral surface of the container mouth portion 2 so as to be screwed with the female screw 14 of the cap 10. It has the latching protrusion 5 which consists of the protrusion provided in the circumferential direction so that the fitting latching part 7 of the magnitude | size which the latching protrusion 16 fits may be formed. The rotation stop protrusion 16 formed on the TE band in the state where the plugging is completed fits into the engagement locking portion 7, thereby preventing rotation of the TE band in the opening direction. Further, the thread discontinuous portion 6 through which the TE band rotation stop protrusion 16 can pass without resistance by the plugging is axially formed on the screw thread 4 in the axial direction above the fitting lock portion 7 of the lock protrusion 5. Is formed. As a result, the cap 10 having the anti-rotation protrusion 16 on the inner peripheral surface of the TE band is not required to get over the screw thread, and the cap 13 is attached to the container mouth by plugging without giving resistance to the bridge 13. It is possible to do.
[0011]
The tamper-evidence container of the present embodiment is configured as described above, and the stopper is positioned so that the rotation prevention protrusion 16 of the cap is positioned above the thread discontinuity 6 of the container mouth portion 2, By capping the cap 10, the female screw of the cap overcomes the thread of the container mouth by elastic deformation, but the anti-rotation protrusion 16 formed on the inner peripheral surface of the TE band has a thread discontinuity of the container mouth. The TE band bridge can be plugged without receiving resistance. Therefore, even if the bridge 13 is formed weaker than before, the cap 13 is not broken at the time of plugging, and a cap that can be easily opened is obtained. Further, the TE band 15 can be easily separated from the container mouth.
[0012]
When the stoppering is finished, as shown in FIGS. 1B and 1C, the rotation preventing projection 16 of the cap is fitted to the fitting locking portion 7 of the locking projection 5 of the container mouth portion. Therefore, the bridge 13 can be broken with almost no rotational play of the cap in the opening direction of the TE band 15, and the tamper evidence is dramatically improved as compared with the conventional case. Thus, according to the present invention, the TE band is engaged by the engagement between the rotation stop protrusion 16 formed on the inner peripheral surface of the TE band in the sealed state and the locking protrusion 5 formed on the outer peripheral surface of the container mouth. The TE band is broken at the same time as opening, for the double reasons that there is no rotation play in the opening direction of the bridge and the bridge is not subjected to resistance when plugging, and the strength of the bridge can be further weakened. Therefore, it is possible to reliably determine whether tampering has occurred.
[0013]
FIG. 4 shows another embodiment of a cap according to the present invention.
The cap 20 of this embodiment has the same configuration as that of the above-described embodiment except that a plurality of slits 22 are formed along the axial direction on the skirt wall 21 of the cap. With this configuration, the skirt wall 21 can be easily expanded when the female screw of the cap gets over the screw thread of the container mouth portion at the time of plugging, and the plugging becomes easier. In addition, as means for facilitating the plugging, an axial discontinuity may be provided in the female screw of the cap together with the slit instead of providing the slit.
[0014]
5 and 6 show other embodiments of the container mouth portion according to the present invention. In these embodiments, the locking projection formed on the outer periphery of the container mouth portion is a screw facing the thread discontinuity portion. The crest 32 is integrally formed at the lower end of the opening rotation direction end of the crest 32. In the container mouth portion 30 of the embodiment shown in FIG. 5, the locking projection 31 is arranged as a locking projection that engages with only the end portion in the opening rotation direction of the rotation stopping projection 35 of the cap. In the figure, reference numeral 33 denotes a thread discontinuity.
[0015]
Further, in the container mouth portion 40 of the embodiment shown in FIG. 6, the locking projection 41 is continuously cut out from the thread discontinuity portion 44 by cutting out only the portion where the rotation stop projection 45 provided on the cap is fitted. It is formed in a protrusion integrally with the screw thread 42 so as to form the fitting locking portion 43 to be formed. Thus, by providing the locking protrusion integrally with the screw thread, the height of the container mouth can be lowered, and the material cost can be reduced. Furthermore, there is an advantage that the structure of the mold for forming the container mouth is simplified, the mold cost is reduced, and the molding is easy. In the present embodiment, an example in which only one rotation prevention protrusion 45 and one engagement protrusion are provided is shown.
[0016]
As mentioned above, although embodiment of this invention was described, this invention is not restricted to these embodiment, A various design change is possible within the range of the technical idea. For example, the rotation stop protrusion formed on the TE band and the locking protrusion formed on the container mouth portion engaged therewith can be appropriately formed in an arbitrary number of one or more. Moreover, although the said embodiment demonstrated the case where it applied to the pouch with a spout, it cannot be overemphasized that this invention can be similarly applied not only to a pouch with a spout but a normal plastic bottle and a glass bottle.
[0017]
【The invention's effect】
As described above, according to the tamper-evidence container of the present invention, since the TE band is fixed without play in the opening rotation direction with the cap being plugged into the container mouth, the bridge breakage can be accelerated compared to the conventional case. It is possible to break the bridge at the same time or sooner as the seal is released when the plug is opened, and the tamper evidence performance can be improved.
[0018]
A thread discontinuity formed on the inner peripheral surface of the TE band is formed on the thread of the container mouth so that the thread discontinuity can be passed in the axial direction. Therefore, the bridge can be formed weaker, the resistance at the time of opening can be reduced, and the opening performance can be improved. Furthermore, the broken TE band can be easily separated from the container mouth, and is excellent in recyclability. In addition, since the screw-threaded cap can be attached to the container mouth by plugging, the sealing process can be shortened and productivity can be improved.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional schematic view of a tamper-evidence container according to an embodiment of the present invention, where (a) is a state before stoppering, (b) is a state capped by stoppering, and (c) opening. Each of the starting states is shown.
FIG. 2 is a cross-sectional view taken along the line AA in FIG.
FIG. 3 is a partial cross-sectional schematic view showing a state where the tamper-evidence container shown in FIG. 1 is applied to a pouch with a spout.
FIG. 4 is a partial cross-sectional schematic view of a tamper-evidence container according to another embodiment of the present invention.
FIG. 5 is a tamper-evidence container according to still another embodiment of the present invention, in which (a) is a front view of the container mouth portion, and (b) is a partial cross-sectional schematic view of the container mouth portion in a sealed state. FIG.
FIG. 6 is a tamper-evidence container according to still another embodiment of the present invention, in which (a) is a front view of the container mouth portion, and (b) is a partial cross-sectional schematic view of the container mouth portion in a sealed state. FIG.
[Explanation of symbols]
1 Pouch body (container body)
2, 30, 40 Container port 4, 32, 42 Thread 5, 31, 41 Lock projection 6, 33, 44 Discontinuous thread 7, 43 Fitting lock 10, 20 Cap 11 Cap body 12 , 21 Skirt wall 13 Bridge 14 Female thread 15 Tamper evident band 16, 35, 45 Anti-rotation protrusion 22 Slit

Claims (5)

A cap having a tamper-evident band integrally provided at the lower end of the skirt wall via a bridge and having a female screw formed on the inner peripheral surface of the skirt wall, and a female screw of the cap screwed on the outer peripheral surface A tamper-evidence container comprising a combination with a container body having a container mouth portion formed with a screw thread, wherein one or more anti-rotation protrusions are formed on the inner peripheral surface of the tamper-evidence band of the cap, A locking projection that engages with the rotation stop projection is formed on the outer peripheral surface of the container mouth portion, and the screw thread has a discontinuous portion with a length that allows the rotation stop projection to pass in the axial direction. The tamper-evident band is locked so that the tamper-evident band cannot be rotated in the opening direction by the engagement of the rotation-stopping projection and the locking projection with the cap attached to the container mouth by plugging. Tamper evidence of container to be. 2. The tamper-evidence container according to claim 1, wherein the locking protrusion is an annular protrusion having a fitting locking part with which a rotation-stopping protrusion of the tamper-evidence band is fitted. 2. The tamper-evidence container according to claim 1, wherein the locking protrusion is a locking protrusion that engages only with an end portion of the tamper-evidence band on the rotation opening side of the rotation-stopping protrusion. The tamper-evidence container according to claim 1, 2 or 3, wherein the locking protrusion is in a protruding state continuous with the thread of the container mouth. The tamper-evidence container according to any one of claims 1 to 4, wherein a slit is formed in an axial direction on a skirt wall of the cap.

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