JP6016300B2 - Seal plug - Google Patents

Description

  The present invention integrally connects a barrier plate for closing a dispensing opening of a container to an inner cylinder having an annular groove opened downward and an inner / outer double cylinder formed by an outer cylinder. The present invention relates to a sealing plug provided with a base cap that is fitted and fixed to the mouth-neck portion of the container by a stopper and an annular band that is integrally connected to the base cap.

  The above-described sealing stoppers are frequently used in drinking-out drinking bottles, refill containers, and the like, and conventionally, for example, those disclosed in Patent Document 1 are known.

  In the sealing plug, a cylindrical body is integrally provided on the lower surface of the barrier plate to form a base cap, and the end of the annular band is integrally connected to the outer peripheral portion of the barrier plate, and the intermediate portion of the annular body is connected to the barrier. By connecting to the outer periphery of the plate in a breakable manner, fitting and fixing the outer peripheral surface of the cylindrical body to the inner peripheral surface of the mouth and neck of the container, and pulling the intermediate portion of the annular body from the outer peripheral portion of the barrier plate Was the container of the base cap easily pulled out from the mouth and neck of the container so that the container could be opened, and whether or not the container had been tampered with properly before the container was properly opened due to the presence or absence of the annular body? It is possible to judge visually whether or not.

Japanese Patent No. 4152717

  However, in the above conventional sealing plug, since the outer peripheral surface of the cylindrical body is merely fitted to the inner peripheral surface of the mouth and neck portion of the container, the fixing and holding force to the container cannot be increased so much. There is a problem that it cannot be raised sufficiently.

  Further, in the conventional sealing plug, there is a possibility that the cylindrical body of the base cap can be pulled out from the mouth and neck of the container without pulling the middle part of the annular belt from the outer peripheral part of the barrier plate. There has been a problem that it cannot be surely determined whether or not an illegal opening has been performed before the container is properly opened depending on whether or not the container is raised.

  Therefore, the problem of the present invention is that the container has a high fitting force with respect to the tip of the neck of the container, and the container can be surely sealed, but can be easily opened at the time of opening, and unauthorized opening before the container is properly opened. The purpose of this invention is to propose a sealing plug that can reliably determine visually whether or not this has been done.

  The sealing plug of the present invention that solves the above-described problems is obtained by forming a barrier plate that closes the dispensing opening of the container into an inner cylinder having an annular groove opened downward, and an inner / outer double cylinder formed by the outer cylinder. A base cap that is integrally connected and is fitted and fixed to the tip of the mouth neck of the container by a stopper, and the base cap is surrounded with the exception of the barrier plate, with respect to the tip of the neck of the tube. A sealing plug comprising an annular band for enhancing a fitting force, wherein the base cap and the annular band can be broken between the lower end portion of the base cap and the lower end portion of the annular band by causing the annular band. And a plurality of connecting pieces that connect the base cap and the annular band so as not to be broken by the annular band.

In the sealing plug having the above configuration,
1) It shall have an outer edge part which connects the said barrier plate integrally with the upper end part of the said inner cylinder of the said base cap,
2) It has an outer edge part which connects the said barrier plate integrally with the lower end part of the said inner cylinder of the said base cap,
3) An annular peripheral wall having an upper end integrally connected to the outer edge of the barrier plate and spaced from the inner side of the inner cylinder of the base cap, and a lower end of the annular peripheral wall, Providing a connecting portion that integrally connects the lower end portion of the inner cylinder of the base cap;
4) A lid is provided on the annular band so as to be swingable via a hinge, and covers the upper end surface of the base cap together with the upper end surface of the annular band, and the lid body is provided as the inner cylinder of the base cap. And having an annular protrusion that is inserted into a gap between the annular peripheral wall, and
5) A first weakened portion that extends vertically along the outer cylinder of the inner and outer double cylinders and divides the outer cylinder in the circumferential direction as the annular band is raised, and the first Forming a second weakened portion that leads to the weakened portion of the outer cylinder and separates the outer cylinder from the inner cylinder except for a part thereof,
6) The first weakened portion and the second weakened portion are formed of a thin portion,
Is preferable as a means for solving the problem.

  According to the sealing plug of the present invention having the above-described configuration, the annular groove opened downward between the double cylinders of the base cap integrally connected to the barrier plate closing the dispensing opening of the container is plugged by the stopper. It is fitted and fixed to the tip of the neck of the neck, and it is connected to the base cap, and an annular band that surrounds the base cap and reinforces the fitting force to the mouth and neck of the container is provided. The fixed holding force can be sufficiently increased, and therefore the sealing force of the container can be sufficiently increased.

  According to the sealing plug of the present invention, a plurality of connecting pieces are broken to cause an annular band, and by pulling the annular band, one end of the base cap is pulled up via the connecting part, and the front end of the container neck and the base The container can be opened by releasing the fitting with the cap from the one end side, and at that time, the plurality of connecting pieces connecting the base cap and the annular band have already been broken, and the fitting force to the mouth and neck of the container is increased. Since it is lowered, it is possible to easily release the fitting between the tip of the neck of the container and the base cap and open the container.

  In addition, according to the sealing plug of the present invention, the base cap and the annular band can be ruptured between the lower end portion of the base cap and the lower end portion of the annular band surrounding the base cap by being caused by the annular band. Since the annular band reinforces the fitting force with respect to the mouth and neck of the container through the connection pieces, the annular band surrounds the base cap and is connected to the mouth and neck of the container. Combined with the point that reinforces the fitting force, if the connection piece is not broken to cause an annular band, it is substantially possible to release the fitting between the mouth neck of the container and the base cap and open the container. Therefore, it is possible to reliably determine visually whether or not the container has been illegally opened before the container is properly opened depending on whether or not the annular body is raised.

In the sealing plug of the present invention, it is preferable that the barrier plate has an outer edge portion integrally connected to the upper end portion of the inner cylinder of the base cap. If it does in this way, since the lower end part of an inner cylinder turns into a free end part which is easy to deform | transform, an inner cylinder can be easily extracted from the inside of the neck of a container at the time of opening.

In the sealing plug of the present invention, it is preferable that the barrier plate has an outer edge portion integrally connected to a lower end portion of the inner cylinder of the base cap. In this way, since the lower end portion of the inner cylinder is supported from the inside by the barrier plate, the inner cylinder is prevented from falling down due to the heat history when the contents of the container are filled with high temperature, and is resistant to liquid leakage. Can be increased.

Further, in the sealing plug of the present invention, an annular peripheral wall that is integrally connected to the outer edge of the barrier plate and spaced apart from the inner side of the inner cylinder of the base cap, to the barrier plate, It is preferable to provide a connecting portion that integrally connects the lower end portion of the annular peripheral wall and the lower end portion of the inner cylinder of the base cap. In this way, since the lower end of the annular peripheral wall is supported from the inside by the barrier plate, the inner cylinder is prevented from falling down due to the heat history when the contents of the container are filled with high temperature, and is resistant to liquid leakage. Furthermore, since the upper end of the annular peripheral wall is integrally connected to the outer edge of the barrier plate, the lower end of the inner cylinder and the lower end of the annular peripheral wall can be integrally deformed. The inner cylinder can be easily extracted from the mouth and neck of the container.

And in the sealing plug of the present invention, a lid is provided on the annular band so as to be swingable via a hinge, and covers the upper end surface of the base cap together with the upper end surface of the annular band. Preferably, the base cap has an annular protrusion that is fitted into a gap between the inner cylinder and the annular peripheral wall. In this way, during the sealing of the container, the cover body covers and conceals the upper end surface of the base cap together with the upper end surface of the annular band, and the gap between the annular band and the outer cylinder of the base cap and the inner cylinder of the base cap. It is possible to prevent foreign substances such as dust from being caught in the gap between the ring and the peripheral wall, and when opening the container, the lid is swung up with respect to the ring band by the hinge, and the lid is used as a clue. Since the annular band can be caused while breaking the plurality of connecting pieces, the container can be opened more easily by releasing the fitting between the tip of the mouth neck of the container and the base cap.

  Further, according to the sealing plug of the present invention, even after the connecting piece is broken, by returning the annular band to the original posture, it is possible to keep the state before unplugging in appearance when the cap is recapped. Thus, the external shape and design of the container are not impaired.

  Furthermore, according to the sealing plug of the present invention, the outer cylinder of the inner and outer double cylinders extends along the top and bottom, and the outer cylinder is divided in the circumferential direction when the annular band is caused. And the second weakened portion that is connected to the first weakened portion and separates the outer cylinder from the inner cylinder except for a part of the outer weakened portion. The tube is cut off from the mouth and neck tip of the container with the first weakened part and the second weakened part as the boundary, and the outer shape of the outer cylinder is greatly changed from the initial shape, so that the container is in an opened state at a glance. Can be determined.

  According to the sealing plug of the present invention, since the first weakened portion and the second weakened portion are formed by the thin-walled portion, the outer cylinder and the inner cylinder can be separated without adding an extra member. This makes it possible to simplify the structure.

(A), (b) is sectional drawing and top view which show the 1st Example of the airtight stopper of this invention with the upper part of a container. It is sectional drawing which shows the sealing stopper shown in FIG. 1 in the state which raised the annular belt. (A), (b) is sectional drawing and top view which show the 2nd Example of the sealing stopper of this invention with the upper part of a container. (A), (b) is sectional drawing and top view which show the 3rd Example of the airtight stopper of this invention with the upper part of a container. (A), (b) is sectional drawing and top view which show the 4th Example of the sealing stopper of this invention with the upper part of a container. It is sectional drawing which shows the sealing plug shown in FIG. 5 in the state which pulled up the cover body and caused the annular belt. (A), (b) is sectional drawing and top view which show the 5th Example of the sealing stopper of this invention with the upper part of a container. It is an external appearance perspective view of the airtight stopper shown in FIG. It is the figure which showed the unplugging condition of the airtight stopper shown in FIG. It is the figure which showed the unplugging condition of the airtight stopper shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Here, FIGS. 1A and 1B are a cross-sectional view and a plan view schematically showing the first embodiment of the sealing plug of the present invention (molded with a synthetic resin or the like) together with the upper part of the container. 2 is a cross-sectional view showing the sealing plug of the embodiment shown in FIG. 1 in a state where the annular band is raised, and reference numeral 1 in the drawing indicates a base cap which is a main component of the sealing plug of this embodiment. . This base cap 1 integrally connects a barrier plate 1a that closes the dispensing opening 2a at the tip 2 of the neck and neck of the container with a double cylinder of an inner cylinder 1b and an outer cylinder 1c, whose upper ends are integrally connected. The annular groove 1d opened downward between the inner cylinder 1b and the outer cylinder 1c of these double cylinders is fitted into the mouth-neck tip 2 of the container by a stopper so as to be fixedly held at the mouth-neck tip 2. It is configured.

  More specifically, in the first embodiment, the inner peripheral ridge 1e of the outer cylinder 1c and the outer peripheral ridge 2b of the mouth neck portion tip 2 of the container are undercut coupled, and the mouth neck portion tip 2 is connected to the inner tube 1b. The base cap 1 is fixedly held at the mouth / neck end 2 of the container. Further, the barrier plate 1 a has an outer edge portion integrally connected to the upper end portion of the inner cylinder 1 b of the base cap 2.

  Further, the sealing plug of the first embodiment includes an annular band 3 surrounding the outer cylinder 1c of the base cap 1, and the gap between the annular band 3 and the outer cylinder 1c is as shown in FIG. As shown in the figure, a plurality of connecting pieces 4 that connect the annular band 3 and the outer cylinder 1c to each other with a circumferential interval at their lower end portions and can be broken by the cause of the annular band 3, and the annular band 3 and the outer cylinder 1c are provided at one place so as not to be ruptured, and the annular band 3 connects the outer cylinder 1c of the base cap 1 to the outer side through the connection piece 4 and the connection part 5. The diameter of the outer cylinder 1c is regulated and the fitting force of the outer cylinder 1c with respect to the mouth neck portion 2 of the container is increased. The annular band 3 has a finger hooking portion 3a protruding outward in the radial direction on the outer peripheral surface opposite to the connecting portion 5 with respect to the central axis.

  According to the sealing plug of the first embodiment having the above-described configuration, the inner cylinder 1b and the outer cylinder 1c of the double cylinder of the base cap 1 integrally connected to the barrier plate 1a for closing the dispensing opening 2a of the container are provided. A downwardly opened annular groove 1d is fitted and fixed to the mouth neck portion 2 of the container by a stopper and is fixedly held, and is integrally connected to the base cap 1 and surrounds the base cap 1 to surround the mouth of the container. Since the annular band 3 is provided to reinforce the fitting force to the neck tip 2 (to prevent the outer cylinder 1c from being enlarged when the base cap 1 is plugged into the mouth neck portion 2 of the container), it is fixed to the container. The holding force can be made sufficiently high, so that the sealing force of the container can be sufficiently increased.

  Further, according to the sealing plug of the first embodiment, as shown by arrows in FIG. 2, the plurality of connecting pieces 4 of the annular body 3 are broken to cause the annular band 3, and the annular band 3 is pulled. Then, one end portion (right end portion in the figure) of the base cap 1 is pulled up via the connecting portion 5, and the undercut connection between the mouth neck portion 2 of the container and the base cap 1 is released from the one end portion side. 1 can be removed from the mouth-and-neck tip 2, and the container can be opened. At this time, the plurality of connecting pieces 4 that connect the base cap 1 and the annular band 3 have already broken, and the outer cylinder 1c with respect to the mouth-and-neck tip 2 of the container Thus, the fitting between the mouth neck portion 2 of the container and the base cap 1 can be easily released and the container can be opened.

  Moreover, according to the sealing plug of the first embodiment, the annular band 3 can be ruptured between the lower end part of the base cap 1 and the lower end part of the annular band 3 surrounding the base cap 1. A plurality of connecting pieces 4 for connecting the base cap 1 and the annular band 3 are provided, and the annular band 3 reinforces the fitting force with respect to the mouth neck portion 2 of the container via the connecting pieces 4. If the piece 4 is not broken to cause the annular band 3, the container neck cannot be opened by substantially releasing the fitting between the mouth neck 2 of the container and the base cap 1; Whether or not an illegal opening has been performed before the regular opening of the container can be surely determined visually by the presence or absence of the raising. Moreover, if the connection piece 4 is not provided in the corresponding part of the finger hook part 3a, it becomes easy to lift the base cap 1 at the time of opening, and operability can be improved.

  Further, according to the sealing plug of the first embodiment, the barrier plate 1a has the outer edge portion integrally connected to the upper end portion of the inner cylinder 1b of the base cap 1, so that the lower end portion of the inner cylinder 1b is easily deformable. Since it becomes a free end portion, the inner cylinder 1b can be easily extracted from the mouth and neck of the container at the time of opening.

  3 (a) and 3 (b) are a sectional view and a plan view showing the second embodiment of the sealing plug of the present invention together with the upper part of the container, in which the same parts as those of the previous embodiment are the same as those shown in FIG. This is indicated by a symbol. That is, the second embodiment is different from the first embodiment only in that the barrier plate 1a has an outer edge portion integrally connected to the lower end portion of the inner cylinder 1b of the base cap 1. In this respect, the same configuration as that of the first embodiment is provided.

  According to the sealing plug of the second embodiment, the same effect as that of the first embodiment can be obtained except that the lower end portion of the inner cylinder 1b does not become a freely deformable free end portion. Since the lower end portion of the inner cylinder 1b is supported from the inside by the barrier plate 1a, for example, even when the contents of the container are filled at a high temperature of 65 ° C. or higher, the inner cylinder 1b is prevented from falling down due to thermal history. The resistance to liquid leakage can be increased.

  4 (a) and 4 (b) are a sectional view and a plan view showing the third embodiment of the sealing plug of the present invention together with the upper part of the container, in which the same parts as those of the previous embodiment are the same as those shown in FIG. This is indicated by a symbol. That is, the third embodiment has an annular peripheral wall 1f that is connected to the barrier plate 1a with its upper end integrally connected to the outer edge of the barrier plate 1a and spaced from the inside of the inner cylinder 1b of the base cap 1. The only difference from the first embodiment is that a connecting portion 1g for integrally connecting the lower end portion of the annular peripheral wall 1f and the lower end portion of the inner cylinder 1b of the base cap 1 is provided. Then, it has the same configuration as the first embodiment.

  According to the sealing plug of the third embodiment, the same effect as that of the first embodiment can be obtained except that the lower end portion of the inner cylinder 1b does not become a free end portion that can be easily deformed. Since the lower end portion of the annular peripheral wall 1f is supported from the inside by the barrier plate 1a, for example, even when the contents of the container are filled at a high temperature of 65 ° C. or higher, the inner cylinder 1b is prevented from falling down due to thermal history. Thus, the resistance against liquid leakage can be enhanced, and the upper end of the annular peripheral wall 1f is integrally connected to the outer edge of the barrier plate 1a, so that the lower end of the inner cylinder 1b and the lower end of the annular peripheral wall 1f are integrated. Since it becomes deformable, the inner cylinder 1b can be easily extracted from the inside of the mouth and neck of the container at the time of opening.

  5 (a) and 5 (b) are a sectional view and a plan view showing the fourth embodiment of the sealing plug of the present invention together with the upper part of the container, and FIG. 6 shows the sealing plug shown in FIG. It is sectional drawing shown in the state which pulled up and caused the annular belt, In the figure, the part similar to the previous Example is shown with the same code | symbol. That is, in the fourth embodiment, in the configuration of the third embodiment, the finger hooking portion protruding radially outward on the outer circumferential surface of the annular band 3 on the side opposite to the connecting portion 5 with respect to the central axis. 3a is provided with a hinge 6, and a lid 7 is held on the annular band 3 so as to be swingable via the hinge 6. With this lid 7, the upper end surface of the base cap 1 is positioned above the annular band 3. The lid 7 has an annular protrusion 7a that is fitted into the gap between the inner cylinder 1b of the base cap 1 and the annular peripheral wall 1f and engages with the inner cylinder 1b. .

  According to the sealing plug of the fourth embodiment, the same effect as that of the third embodiment can be obtained. In addition, the lid body 7 covers the upper end surface of the base cap 1 during the sealing of the container. Covering together with the upper end surface of the annular band 3, foreign matter such as dust is prevented from being caught in the gap between the annular band 3 and the outer cylinder 1c of the base cap 1 and the gap between the inner cylinder 1b of the base cap 1 and the annular peripheral wall 1f. When the container is opened, as shown by an arrow in FIG. 6, the lid body 7 is swung up with respect to the annular band 3 by the hinge 6, and a plurality of the lid bodies 7 are used as a clue. Since the annular band 3 can be caused while breaking the connecting piece 4, the container can be opened by releasing the fitting between the mouth neck portion 2 of the container and the base cap 1 more easily.

  As mentioned above, although demonstrated based on the example of illustration, this invention is not limited to the said Example, It can change suitably within the description range of a claim, for example, in the 1st-3rd Example. The finger hooking portion 3a projecting outward in the radial direction may be eliminated to make it difficult to cause an unintended cause of the annular band 3, and in the fourth embodiment, instead of providing the hinge 6 and the lid 7, the base cap A film (such as a tack seal) that covers the upper end surface of 1 together with the upper end surface of the annular band 3 may be attached.

  In addition, the sealing plug of the present invention shown in the first to fourth embodiments described above is designed so that the annular band 3 is restored to the original state even after the annular strip 3 is raised and the connecting piece is broken and unplugged to open the container. It is possible to return to the posture, and in the case of recapping, there is an advantage that the external appearance is kept in the state before opening, and the external shape, design, etc. of the container are not impaired.

  Next, as a fifth embodiment of the sealing plug of the present invention, a configuration example of a sealing plug to which a function capable of clearly discriminating whether or not the plug has been removed will be described.

  FIGS. 7 (a) and 7 (b) show a sealing plug in which the shape of the outer cylinder 1c changes after being plugged and the annular band 3 cannot be returned to its original state, and it can be easily discriminated whether it has been plugged. FIG. 8 is a cross-sectional view and a plan view showing a specific configuration, and FIG. 8 is an external perspective view of the sealing plug shown in FIG. In the figure, the same parts as those in the previous embodiment are denoted by the same reference numerals.

  In the fifth embodiment, a first weakened portion 8 that extends along the top and bottom of the outer cylinder 1c and divides the outer cylinder 1c in the circumferential direction when the annular band 3 is raised, and the first weakened portion. A second weakened portion 9 is formed which is connected to the portion 8 and separates the outer cylinder 1c from the inner cylinder 1b except for a part thereof.

  According to the sealing plug having the above-described configuration, as shown in FIGS. 9 and 10, the outer cylinder 1c is divided in the circumferential direction with the first weakened portion 8 as a boundary (see FIG. 9). Subsequently, it is separated from the inner cylinder 1b at the second weakened portion 9 (see FIG. 10). As a result, the outer cylinder 1c is separated from the mouth / neck end 2 of the container to change its shape after unclamping, and the annular band 3 cannot be returned to its original state, and it can be easily determined whether or not the container has been opened. .

  Although the 1st weakening part 8 and the 2nd weakening part 9 can be formed by providing a thin part, you may form by providing a slit-shaped notch, and it is not limited about this point.

  In the sealing plug of this structure, the first weakened portion 8 is connected to the connecting portion in order to smoothly cause the annular band 3 and the accompanying circumferential division by the first weakened portion 9 of the outer cylinder 1c. 5 is preferably provided in the adjacent portion (the outer cylinder 1c and the connecting portion 5 remain connected). Further, the outer cylinder 1c and the inner cylinder 1b may be completely separated by the second weakening portion 9, but in this case, the inner cylinder 1b and the barrier plate 1a connected to the inner cylinder 1b at the time of unplugging are provided at the front end of the mouth neck of the container. In order to pour out the contents, another operation for removing the inner cylinder 1b together with the barrier plate 1a is required. For this reason, it is good to provide the bridge | bridging 10 which connects the outer cylinder 1c and the inner cylinder 1b locally in the cutting | disconnection terminal part of the 2nd weakening part 9 (refer FIG. 7). That is, the end of the second weakening unit 9 is provided with an uncut margin that does not reach the starting end. Due to the presence of the bridge 10, the inner cylinder 1 b is maintained in a state of being connected to the annular band 3 via the outer cylinder 1 c and the connecting portion 5, and the inner cylinder 1 b together with the barrier plate 1 a is simply pulled up. It can be easily removed from the mouth-and-neck tip 2 of the container.

  Thus, according to the sealing plug of the present invention, the annular groove opened downward between the double cylinders of the base cap integrally connected to the barrier plate that closes the dispensing opening of the container is plugged into the mouth and neck of the container. It is fitted and fixed to the tip, and it is connected to the base cap, and an annular band is provided to surround the base cap and enhance the fitting force to the mouth and neck of the container. Can be made sufficiently high, so that the sealing force of the container can be sufficiently increased. In the first to fifth embodiments, the structure in which the outer cylinder 1c is not in close contact with the annular band 3 when the base cap 1 is plugged into the mouth / neck end 2 of the container (in the top view, the outer cylinder 1c and Although a gap is formed between the annular bands 3), the outer cylinder 1 c may be expanded to be in close contact with the annular band 3. In this case, the sealing performance is improved by the effect of tightening, and the fitting force to the mouth and neck is further strengthened.

  According to the sealing plug of the present invention, a plurality of connecting pieces are broken to cause an annular band, and by pulling the annular band, one end of the base cap is pulled up via the connecting part, and the front end of the container neck and the base The container can be opened by releasing the fitting with the cap from the one end side, and at that time, the plurality of connecting pieces connecting the base cap and the annular band have already been broken, and the fitting force to the mouth and neck of the container is increased. Since it is lowered, it is possible to easily release the fitting between the tip of the neck of the container and the base cap and open the container. In this case, it is possible to return the annular band to the original posture, and when the cap is recapped, the appearance is kept in the state before unplugging.

  In addition, according to the sealing plug of the present invention, the base cap and the annular band can be ruptured between the lower end portion of the base cap and the lower end portion of the annular band surrounding the base cap by being caused by the annular band. A plurality of connecting pieces are provided, and the annular band enhances the fitting force with respect to the mouth and neck of the container through the connecting pieces. Therefore, the annular band surrounds the base cap and is attached to the mouth and neck of the container. Combined with the point of increasing the fitting force, if the connecting piece is not broken to cause an annular band, it is substantially possible to release the fitting between the mouth neck of the container and the base cap and open the container. Therefore, it is possible to reliably determine visually whether or not the container has been illegally opened before the container is properly opened depending on whether or not the annular body is raised.

  Furthermore, according to the sealing plug of the present invention, the outer cylinder constituting the base cap is provided with the first weakening portion that extends along the top and bottom and divides the outer cylinder in the circumferential direction when the annular band is caused. Along with this first weakened portion, there is provided a second weakened portion that separates the outer cylinder from the inner cylinder except for a part of the outer cylinder. Since the initial shape before opening is greatly changed, it can be easily determined whether or not the opening has been made.

DESCRIPTION OF SYMBOLS 1 Base cap 1a Barrier board 1b Inner cylinder 1c Outer cylinder 1d Annular groove 1e Inner peripheral protrusion 1f Annular peripheral wall 1g Connection part 2 Mouth neck part 2a Outlet 2b Outer protrusion 3 Annular belt 3a Finger hook part 4 Connection piece 5 Connection part 6 Hinge 7 Lid 7a Annular projection 8 First weakened part 9 Second weakened part 10 Bridge

Claims (7)

A barrier plate for closing the dispensing opening of the container is integrally connected to an inner cylinder having an annular groove opened downward and an inner / outer double cylinder formed by an outer cylinder, and the annular groove is plugged. A base cap that is fitted and fixedly held at the tip of the mouth and neck of the container, and an annular band that surrounds the base cap except for the barrier plate and enhances the fitting force of the cylinder to the tip of the neck and neck. A sealing plug,
Between the lower end of the base cap and the lower end of the annular band, a plurality of connecting pieces that connect the base cap and the annular band so as to be ruptureable by causing the annular band, and cannot be broken by causing the annular band. and a connecting portion connecting the their base cap and the annular band is provided,
An annular peripheral wall having an upper end integrally connected to the outer edge of the barrier plate and spaced from the inner side of the inner cylinder of the base cap, a lower end of the annular peripheral wall, and the base cap And a connecting portion that integrally connects the lower end portion of the inner cylinder . The sealing plug according to claim 1, wherein the barrier plate has an outer edge portion integrally connected to an upper end portion of the inner cylinder of the base cap. The sealing plug according to claim 1, wherein the barrier plate has an outer edge portion integrally connected to a lower end portion of the inner cylinder of the base cap. A lid is provided on the annular band so as to be swingable via a hinge, and covers the upper end surface of the base cap together with the upper end surface of the annular band,
The lid is sealed plug according to any one of claims 1 to 3, characterized in that it has an annular projection which is inserted into the clearance between the inner cylinder and the annular peripheral wall of the base cap. A first weakening section that extends vertically along the outer cylinder of the inner and outer double cylinders and divides the outer cylinder in the circumferential direction when the annular band is raised, and the first weakening leading to parts, sealing stopper according to the outer cylinder to any one of claims 1-4, characterized in that to form the second weakened portion to separate from the inner tube except for a part thereof. The hermetic stopper according to claim 5 , wherein the first weakened portion and the second weakened portion are formed of a thin portion. The hermetic plug according to claim 5 or 6, further comprising a bridge that extends between a start end and a terminal end of the second weakening portion and locally connects the outer cylinder and the inner cylinder. .

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