JP2006282178A - Synthetic resin cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic resin cap which indicates unsealing of a container without fail to improve tamper evident performance, and displays a prize or the like upon uncapping. <P>SOLUTION: The synthetic resin cap is composed of a combination of a cap body 2, which has a skirt wall 8 having a screw thread on its inner periphery and a top wall 7 having a circular opening 6 at its center, and an inner stopper 3 which has a circular central projecting face 17 that is fitted into the circular opening 6 from below to so project as to bring the top of the projecting face 17 almost flush with the outer surface of the top wall 7 of the cap body 2, and a flange having an inner ring 16 on its lower face. An unsealing label 30 having a peeling display function is pasted across the projection face 17 of the inner stopper 3 and the outer surface of the top wall 7 of the cap body 2. Upon uncapping, the unsealing label 30 is peeled off the projection face 17 to automatically display a mark of an unsealing notice, prize, etc. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a synthetic resin cap, and more particularly to a synthetic resin cap comprising a combination of a cap body and an inner stopper and having tamper evidence and a prize display function.

  Conventionally, a synthetic resin cap used as a cap of a container such as a beverage (hereinafter, a bottle is described as a typical example of a container, but is not limited to a bottle) generally ensures tamper evidence. Therefore, a tamper evidence band (hereinafter referred to as a TE band) is provided at the lower end of the skirt wall via a weakened portion, and the cap attached to the bottle has a structure that cannot be opened unless the weakened portion is broken. Therefore, the unopened bottle can be confirmed by visually checking whether or not the bridge is broken. On the other hand, the bottle is sealed by the close contact between the liner fitted to the inner surface of the cap and the top of the bottle, or the inner ring and / or outer ring formed on the inner surface of the synthetic resin cap and the pressure near the top of the bottle. I am trying. Therefore, if the bottle is tampered with due to mischief or the like, the cap of the synthetic resin is turned in the direction of opening and the top of the bottle and the liner of the cap, or the inner ring and / or the outer ring are separated even slightly to seal. Ideally, the bridge is reliably broken before it breaks.

  However, it is structurally difficult to attach the cap when the locking means (for example, a flap piece) provided on the TE band is completely engaged with the locking means (for example, a turnip) of the bottle. As shown in FIG. 1, there is a slight gap between the tip of the flap and the lower surface of the turnip, and while the lid is raised by this gap, the cap rises without any breaking force acting on the bridge. If the bottle top is separated from the liner, the seal may be broken. Further, in the conventional TE band, the breakage of the weakening line and the separation from the inner ring and outer ring fitted to the top of the bottle (that is, the breaking of the sealing performance) are performed almost at the same time. There was a problem of being big. In order to solve such a problem, the present applicant, as a cap made of synthetic resin, can prevent the required torque at the initial stage of opening from becoming excessive and reliably prevent the tamper evidence property from being damaged. A synthetic resin cap composed of a synthetic resin stopper for sealing the top of the mouth and a synthetic resin outer lid for preventing the stopper from being detached from the top of the bottle (see Patent Document 1). .

On the other hand, there have been various proposals for a prize cap with a prize mark, but the conventional prize cap has a prize mark on the inner surface of the top wall and covered with a liner. After opening the seal part around the liner This is confirmed by peeling and removing only the central part while leaving the mark (for example, see Patent Document 2). Alternatively, a resin cap has been proposed in which a resin pad is provided on the back of the cap top wall so as to conceal the prize mark, and the resin pad can be peeled off from the top surface with the prize mark transferred (for example, a patent). Reference 3).
Japanese Patent Laid-Open No. 2003-128101 No. 2-34105 JP 2001-315829 A

  A conventional cap with a prize has to be peeled and removed from the back of the top wall of the cap while the liner around the top surface that contributes to sealing the bottle remains, and the part that hides the prize mark must be peeled off. In Patent Document 3, the structure of the resin pad is complicated, the cost is high, the prize mark is difficult to see, and at least two actions are required to check whether the prize is missed. There was annoyance that it was not possible to confirm the success or failure at the same time as opening. In addition, when mailing separately for exchanging prizes for prizes, it is necessary to mail the cap itself or the resin pad on which the win is displayed, and there is a problem to be solved in terms of handling properties such as bulkiness. It was. On the other hand, in order to secure tamper evidence in the conventional cap, it is inevitable to provide a TE band, and there is a problem that the amount of resin required for the cap increases accordingly, and the cap is opened at the time of initial opening. There are problems to be solved, such as torque reduction and reliable breaking of the TE band before sealing failure.

  Therefore, the present invention is intended to solve the above-mentioned conventional problems all at once, and the bottle opening (sealing failure) can be surely observed, the tamper evidence can be further improved, and the TE band which has been conventionally required A cap made of synthetic resin that can display the prize display etc. at the same time as opening with a simple configuration and can eliminate the problems of the conventional prize display cap. The purpose is to provide.

  The synthetic resin cap of the present invention for solving the above-mentioned problems is a cap body having a skirt wall having a thread formed on the inner peripheral surface and a top wall having a circular opening formed in the center, A circular central projecting surface that is fitted into the circular opening from below and whose top surface projects substantially the same as the top wall outer surface of the cap body, and at least a container extending outward from the lower surface of the circular central projecting surface It comprises a combination of an inner plug composed of a flange portion covering the top surface of the mouth, and an opening label having a peeling display function is pasted over the circular central projecting surface of the inner plug and the top wall outer surface of the cap body. It is a feature.

  In a state where the inner stopper is hermetically attached to the top of the container mouth, the rotational friction resistance between the inner stopper and the container mouth is larger than the rotational friction resistance between the inner stopper and the cap body, and When the cap body is rotated from the sealed state to the opening direction, the opening label peels off from the circular central protruding surface of the inner plug. By displaying characters, designs, etc., it is possible to add a display function on the top of the cap when the cap is opened. Alternatively, as another form of the peeling portion, the rotational friction resistance between the inner stopper and the container mouth is between the inner stopper and the cap body in a state where the inner stopper is hermetically attached to the container mouth top. When the cap body is rotated in the opening direction from the sealed state, the opening label is larger than the rotational friction resistance and greater than the rotational peel strength between the opening label and the top wall outer surface of the cap body. It can also be configured to peel from the outer surface of the top wall.

  The unsealed label is made visible so that the unsealed mark indicating that it has been opened is visible from the outside by peeling off from the circular central projecting surface of the inner plug or the top wall outer surface of the cap body. The tamper evidence of the cap can be secured without using the conventional TE band. In that case, when a tamper evidence band is provided at the lower end of the skirt wall of the cap body via a weakening line as in the conventional case, the tamper evidence is doubled by the breakage of the weakening line and the display of the opened mark. A cap that can be displayed is obtained. Further, the opening label can be operated with a simple configuration by displaying the prize mark so that it can be visually recognized from the outside by peeling off the circular central projecting surface of the inner plug or the outer surface of the top wall of the cap body. A synthetic resin cap that is easy and easy to see and easy to handle can be obtained.

  According to the present invention, when the container is opened (seal breakage), a mark such as a letter indicating that the container has been opened and a mark such as an image line are surely displayed on the top of the cap. Excellent in properties. Moreover, since the display appears immediately when the cap is rotated, the responsiveness is very good. For example, it is possible to determine the history that the opening operation has been added reliably even when the TE band weakening line is not completely broken. . Therefore, it is possible to omit the TE band that has been conventionally required for securing the TE property, and it is possible to provide a cap excellent in the TE property at a low cost. When the cap is rotated, the mark that appears on the top of the cap becomes a prize mark, for example, so that you can see at a glance the prize at the same time as opening, and you need to peel off the liner and pad from the back of the top of the cap as before Therefore, it is possible to confirm the success / failure in one operation, and to obtain a cheap and easy-to-handle synthetic resin cap. In addition to the sweepstakes mark, other indications such as fortune telling can be displayed at the same time as opening, and an added value such as entertainment can be given to the cap. Further, according to the cap of the present invention, even if the TE band is provided, the breakage of the weakening line and the separation of the inner ring and the outer ring fitted to the top of the container are performed at different timings. The initial torque of the stopper can be reduced and the opening performance is excellent.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front cross-sectional view of a synthetic resin cap according to an embodiment of the present invention screwed into a container port. A synthetic resin cap 1 according to this embodiment includes a cap body 2 and an inner plug 3 and is formed of a synthetic resin such as polypropylene or polyethylene. The cap body 2 has a top wall 7 formed with a circular opening 6 having a circular opening at the center and a skirt wall 8 depending from the periphery thereof. Is provided with a TE band 9 through an appropriate weakening line 10 that can be broken when a combination of slits and bridges or a score is opened. The TE band 9 is provided with appropriate locking means 12 such as a flap for locking with an engaging convex portion 51 such as a turnip of the bottle 50. A female screw 11 is formed on the inner peripheral surface of the skirt wall 8 to be screwed into a male screw 52 formed at the bottle mouth. The circular opening 6 of the top wall 7 is positioned at least inside the inner diameter of the bottle mouth 53, and is sized so that the circular central projecting surface 17 of the inner plug 3 to be described later engages with the lower surface of the top wall 7 in a sealed state of the bottle. Is formed. Then, the lower surface of the inner peripheral edge of the circular opening 6 protrudes downward to form an annular protrusion 13 and engages with the annular step surface 18 of the inner plug. In this embodiment, as will be described later, the upper part of the female screw 11 formed on the cap body is engaged with the lower surface of the outer peripheral part 20 of the inner plug in order to remove the inner plug from the bottle mouth when opening the plug. The inner plug is pushed up, but if necessary, an engaging ridge that engages the outer peripheral edge of the inner plug is formed on the inner peripheral surface of the skirt wall at a predetermined interval from the lower surface of the top wall 7. May be.

  On the other hand, as shown in FIG. 1, the inner plug 3 is suspended from the top wall 15 having an outer diameter larger than the bottle mouth top outer diameter and smaller than the inner diameter of the skirt wall base of the cap body. It is comprised from the cylindrical inner ring 16 engaged with the bottle mouth end inner peripheral surface. The central portion of the top wall 15 is fitted with the circular opening 6 of the cap body 2 and has a circular central protruding surface 17 protruding so that the top surface forms a substantially flat surface with the outer surface of the top wall of the cap body. The outer peripheral portion of the circular central projecting surface 17 is an annular flange portion. Although the upper surface of the annular flange portion may be a flat surface, it is desirable that the annular stepped surface 18, the annular projecting surface 19, and the outer peripheral portion 20 are formed in an uneven surface shape in order, as illustrated. The annular step surface 18 is formed to have a width that engages with the annular protrusion 13 of the cap body. When the cap body is wound around the bottle mouth, the outer peripheral surface of the annular protrusion 13 and the inner peripheral surface of the annular protrusion surface 19 are formed. Lock to prevent overtightening. Further, the annular projecting surface 19 also functions as a pressure receiving surface that presses the inner plug 3 against the bottle mouth when the inner surface of the top wall of the cap body is in pressure contact. The lower surface of the outer peripheral portion 20 functions to allow the screw cap formed on the inner peripheral surface of the skirt wall of the cap main body or the locking protrusion to be locked when the cap is opened, and to remove the inner plug from the bottle mouth together with the cap main body. . The lower surface of the annular flange portion is recessed in the outer peripheral portion of the inner ring 16 so as to be closely engaged with the top of the bottle mouth as shown in the figure, and the outer side slightly hangs down to perform the outer ring function. The inner ring 16 and the recess 21 are pressed against the vicinity of the bottle mouth top so that the sealing performance is maintained. In addition, you may form an outer ring by hanging the outer peripheral part of a dent longer as needed.

  In the synthetic resin cap 1 composed of the combination of the cap body 2 and the inner plug 3 having the above-described configuration, as shown in FIGS. 1 and 2, the outer surface of the top wall 7 of the cap body 2 and the top of the inner plug 3. An opening label 30 is pasted so as to straddle both surfaces of the circular central projecting surface 17 of the wall 15. As shown in FIG. 2, the unsealed label 30 is not attached to the cap. As shown in FIG. 2, special characters and designs are not visible. In this embodiment, when the opening label 30 is peeled off from the circular central projecting surface 17 of the inner plug 3, it indicates that the lid has been opened on the opening label 30, for example, as shown in FIG. The display 31 is displayed on the label surface. As the unsealing label 30, a commercially available anti-tamper sheet can be used. For example, a patterned release layer, a print layer, a cushion layer, and an adhesive layer having peelability are sequentially formed on the back surface of the transparent film, and overlapped with the release layer. Printed characters and image lines that appear when the label is peeled off on the layer, and when the label is peeled off from the attachment, for example, "opened" characters appear on the opening label as characters Can be adopted. When the opening label is peeled off, the mark may be transferred to the circular central projecting surface 17 together with the display on the opening label.

  In the present embodiment, the opening label is attached so as to satisfy the following conditions in order to give tamper evidence that indicates whether the lid is opened or not. That is, it is preferable that the vicinity of the outer peripheral portion of the opening label 30 is strongly bonded to the outer surface of the top wall 7 of the cap body and weakly bonded to the circular central projecting surface 17 of the inner plug so as to be easily peelable. The weak adhesion is stuck so as to have a strength relationship such that it can be peeled off with a rotational force weaker than the rotational frictional resistance due to the fitting between the inner stopper and the bottle mouth at the initial stage of opening the bottle. Note that the rotational friction resistance between the inner plug 3 and the container mouth portion 53 is larger than the rotational friction resistance between the inner stopper 3 and the cap body 2 in a state where the cap 1 is hermetically attached to the container mouth top. Therefore, when opening the cap, as shown in FIG. 3, when the cap body 2 is grasped and the cap is rotated, the cap body 2 rises along the lead angle of the screw thread. The inner plug 3 does not rise by the fitting frictional force with the inner peripheral surface of the bottle mouth top portion of the inner ring 16 and maintains the sealed state. Therefore, a peeling force acts between the opening label 30 and the circular central projecting surface 17 of the inner plug 3, the opening label 30 is peeled off from the circular central projecting surface 17, and the hidden mark printed on the opening label is a circular center. While being transferred to the protruding surface, it appears as a transparent part on the opened label, and the opened state is displayed as shown in FIG. Peeling between the circular central projecting surface 17 and the opening label 30 is mainly caused by shearing force due to the rotational force of the cap body, so it peels off immediately with slight rotation, and the weakening line 10 between the TE band 9 and the cap body breaks. Before the release, the annular projecting surface and the opening label are peeled off. Therefore, according to the present invention, compared to the conventional display using the TE band, the initial opening display response is excellent, and a display indicating that the package has been opened appears on the top of the cap. Excellent evidence.

  Therefore, it is possible to impart tamper evidence to the cap only by the opening label, and in the above embodiment, the TE band 9 is provided, but the synthetic resin that can ensure the tamper evidence even if the TE band 9 is omitted. A cap can be obtained. In that case, since there is no TE band, the amount of resin used during cap production can be reduced, and the production mold and production process can be simplified, greatly reducing the cost of synthetic resin caps. Reduction can be achieved.

  As described above, when the bottle is opened, when the cap is rotated, the opening label 30 is first peeled off from the circular central projecting surface 17 of the inner plug, and then the weakening line of the TE band 9 is broken, so that the TE band becomes the skirt wall 8. Is separated (state of FIG. 3). From this state, by further rotating the cap body 2, the upper end portion of the female screw 11 of the cap body engages with the lower surface of the outer peripheral portion 20 of the inner plug 3, and further rises while pushing up the inner plug. 3 together with the cap body 1 can be removed from the bottle mouth.

  In the above-described embodiment, the case of the tamper-evidence cap using the opening label 30 as the tamper-evidence travel for displaying the opening of the cap has been described. However, in the present invention, characters, designs, etc. are automatically added to the opening label 30 at the time of opening. Using the displayed function, it can be used as a cap with a prize display that can automatically display a prize mark when opened. In that case, in the same configuration as in the above embodiment, the prize mark 35 such as “win” or “miss” may be hidden and displayed in advance on the display unit, for example, as shown in FIG. For example, when the cap is opened, the consumer can automatically confirm whether or not the prize has been won, thereby increasing the consumer's interest. A conventional cap with a prize display requires at least two actions to confirm the winning or losing of the prize, such as peeling a liner that hides the display part such as the inner surface of the cap top wall after opening. According to the present invention, there is an advantage that it is possible to immediately confirm the winning / failing of the prize by only one operation of opening the plug. In addition, there is an advantage that the hit display label can be easily peeled off from the cap body and attached to the application form. In addition to the prize display, if fortune telling, characters, etc. appear on the top of the cap at the same time as opening, it is possible to provide entertainment that is not found in conventional caps.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment, and various design changes are possible. For example, in the above embodiment, the unsealing label is peeled off from the circular central protruding surface of the inner plug at the time of opening, and is displayed on that portion. On the contrary, the opening label is strongly bonded to the circular central protruding surface. By making weak adhesion to the top surface of the top wall 7 of the cap body, the outer periphery of the opening label can be peeled off from the top surface of the top wall of the cap body at the time of opening, so that the display can appear on that portion. It is. In this case, the circular central projecting surface of the inner plug is not necessarily a flat surface, and can be formed so as to project in a dome shape on the outer surface of the top wall 7 of the cap body.

  The synthetic resin cap of the present invention is a cap excellent in tamper evidence and entertainment, used as a cap for a spout of a pouch, a container such as a synthetic resin, glass or metal bottle regardless of the type of contents. Is possible.

It is sectional drawing in the state with which the synthetic resin cap which concerns on embodiment of this invention was mounted | worn with the bottle mouth. 1 is a plan view of a synthetic resin cap according to an embodiment of the present invention. It is sectional drawing showing the state in the middle of opening from the state of FIG. FIG. 4 is a plan view of the synthetic resin cap in the state of FIG. 3. FIG. 6 is a plan view of a synthetic resin cap according to another embodiment corresponding to FIG. 4 when a prize mark is displayed on an opening label.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Synthetic resin cap 2 Cap main body 3 Inner plug 6 Circular opening 7 Top wall 8 Skirt wall 9 Tamper evidence (TE) band 10 Weakening wire 11 Female screw 13 Annular protrusion 15 Top wall 16 Inner ring 17 Circular central protruding surface 18 annular step surface 19 annular projecting surface 20 outer peripheral lower surface 21 dent 30 opening label 31 display 35 prize mark 53 bottle mouth

Claims (6)

  A cap body having a skirt wall having a thread formed on the inner peripheral surface and a top wall having a circular opening formed in the center, and fitted into the circular opening from below, the top surface of which is An inner plug comprising a circular central protruding surface protruding substantially in the same plane as the top wall outer surface of the cap body, and a flange portion extending outward from the lower surface of the circular central protruding surface and covering at least the top surface of the container mouth. A synthetic resin cap comprising a combination of the above, and an opening label having a peeling display function applied to the circular central projecting surface of the inner plug and the outer surface of the top wall of the cap body.   In a state where the inner stopper is hermetically attached to the top of the container mouth, the rotational friction resistance between the inner stopper and the container mouth is larger than the rotational friction resistance between the inner stopper and the cap body, and It is larger than the rotational peel strength between the opening label and the circular central protruding surface of the inner plug, and when the cap body is rotated from the sealed state in the opening direction, the opening label is peeled off from the circular central protruding surface of the inner plug. The synthetic resin cap according to claim 1, which is configured as follows.   In a state where the inner stopper is hermetically attached to the top of the container mouth, the rotational friction resistance between the inner stopper and the container mouth is larger than the rotational friction resistance between the inner stopper and the cap body, and The rotational peel strength between the opening label and the top wall outer surface of the cap body is greater than that, and the opening label is peeled off from the top wall outer surface of the cap body when the cap body is rotated from the sealed state to the opening direction. The synthetic resin cap according to claim 1.   The opened label, which indicates that the opened label is opened by peeling off from the circular central projecting surface of the inner plug or the outer surface of the top wall of the cap body, is displayed to be visible from the outside. A synthetic resin cap according to any one of the above.   5. A tamper-evidence band is provided at a lower end portion of the skirt wall of the cap body via a weakening line, and the tamper-evidence property is provided twice by breaking the weakening line and displaying the opened mark. The synthetic resin cap described in 1.   The said opening label is a product made from the synthetic resin in any one of Claims 1-3 by which a prize mark is displayed visually from the outside by peeling with the circular center protrusion surface of the said stopper, or the top wall outer surface of the said cap main body. cap.

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