JP5788223B2 - Container lid and packaging container using it - Google Patents

Description

  The present invention relates to a lid of a container with an inner seal that has excellent airtightness and has an opening guarantee function, and a packaging container that uses the lid.

  Various drugs and products that require drying such as instant coffee are stored in an airtight container, and the mouth of the container is sealed through an inner seal. The inner seal is a laminate material of, for example, an aluminum foil and a plastic film, and by adhering to the mouth of the container through a sealant layer on the surface, good airtightness can be realized and the container is opened at the time of opening. Since it is necessary to peel off and remove from the mouth part, an opening guarantee function can also be realized.

  On the other hand, when such an inner seal is peeled off from the mouth of the container, the sealant layer partially remains in the mouth of the container, and the upper end surface of the mouth does not return to a sufficiently smooth surface. However, airtightness is often insufficient. Therefore, it is known that an inner ring that is fitted and sealed in the mouth of the container is formed on the top surface of the cap, and resealing by the inner ring is employed (Patent Document 1).

  That is, an inner seal is adhered to the mouth portion of the container, and a dummy seal is installed on the front side of the inner ring of the cap and attached to the mouth portion of the container. When the cap is removed, the dummy seal on the cap side moves onto the inner seal at the mouth of the container, so that the dummy seal and the inner seal are peeled off from the mouth of the container at once and the container is opened. After opening, the container is resealed using the inner ring of the cap. The dummy seal protects the inner ring on the cap side from damaging the inner seal on the container side when attaching the cap, and also keeps the inner ring in virgin and improves the airtightness of the inner seal.

JP 2008-56319 A

  According to such a conventional technique, the mouth portion of the container is double-sealed through the inner seal on the container side and the dummy seal on the cap side. The bonding process is necessary as another intermittent process, and there is a problem that high processing efficiency is difficult to achieve.

  Therefore, in view of the problems of the prior art, the object of the present invention is to hold the inner seal on the cap side via a ring-shaped spacer, thereby making the inner seal adhering process following the cap mounting process a continuous process. An object of the present invention is to provide a container lid capable of improving the processing efficiency and a packaging container using the same.

  The structure of the first invention according to this application for achieving the above object (referring to the invention according to claim 1, the same applies hereinafter) includes a cap with an inner ring that is fitted into a mouth of a container and sealed, and a cap. A ring-shaped spacer that is detachably installed, and an inner seal that is larger than the outer diameter of the upper end surface of the mouth of the container and that is held on the lower surface side of the spacer. A plurality of upward engaging pieces to be arranged are detachably engaged with the outer periphery of the inner ring, and the inner seal is mounted on the mouth of the container together with the spacer by attaching a cap to the mouth of the container. The gist is to make the adhesive force on the spacer side larger than the adhesive force on the container side by bonding to the upper end surface of the part and the lower surface of the spacer.

  In addition, the spacer can hold | maintain an inner seal | sticker via the holding part suspended along the outer periphery.

  Further, when the cap is attached to the mouth portion of the container together with the spacer and the inner seal, the cap can press the upper end of the engagement piece and the outer peripheral portion of the spacer downward.

  The gist of the structure of the second invention (referring to the invention according to claim 5, hereinafter the same) consists of the container and the lid of the container according to the first invention attached to the mouth of the container.

  According to the configuration of the first invention, the inner seal is mounted on the cap via the spacer, the cap is attached to the mouth of the container and set on the mouth, and the upper end surface of the mouth of the container and the spacer The mouth of the container can be hermetically sealed by adhering to both the lower surface. When the container is opened, the cap is removed from the mouth of the container to expose the spacer and the inner seal on the mouth of the container, and the inner seal is peeled off from the mouth together with the spacer. The inner seal is bonded to both the mouth of the container and the lower surface of the spacer, and the spacer is detachable from the cap. Therefore, when the cap is removed for opening, the spacer is attached together with the inner seal. It remains on the mouth side of the container. Moreover, since the inner seal has a larger adhesive force on the spacer side than the adhesive force on the container side, the inner seal can be easily peeled from the mouth portion of the container using the outer periphery of the spacer as a gripping margin. The opening of the container after opening can be resealed via the cap by fitting the inner ring of the cap.

  The inner seal is thermally bonded to both the mouth portion of the container and the spacer at once, for example, by electromagnetic induction heating. Therefore, the inner seal is formed by, for example, laminating a reinforcing PET layer and a thermoplastic sealant layer such as LDPE on both sides of an aluminum foil. The steps after the inner seal adhering step following the cap mounting step can be a completely continuous step, and the processing efficiency can be improved. However, the inner seal may be installed in the cap in a state of being bonded to the lower surface side of the spacer in advance, and it is only necessary that the inner seal is finally bonded to both the spacer side and the container side to seal the mouth of the container.

  The spacer can set the inner seal correctly and reliably on the mouth of the container by holding the inner seal via a holding portion that hangs on the outer periphery. In addition, the spacer can be detachably connected to the cap by internally engaging the engagement pieces arranged along the inner periphery with the outer periphery of the inner ring. Furthermore, the cap prevents the inclination of the spacer by simultaneously pressing downward on the upper end and outer peripheral portion of the inner peripheral engagement piece of the spacer, and the inner seal on the lower surface side of the spacer is connected to the upper end surface of the mouth portion of the container. It can be made to adhere correctly and uniformly.

  According to the configuration of the second invention, the effect of the first invention can be realized by combining the container and the lid according to the first invention to be attached to the mouth of the container.

Whole structure exploded perspective view Overall configuration vertical half section 2 is an enlarged view of the main part of FIG. Explanation of spacer configuration Usage diagram Fig. 2 equivalent diagram showing the state of use Fig. 3 equivalent diagram showing the state of use

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The packaging container is formed by combining a container lid provided with a cap 20, a ring-shaped spacer 30, and a circular inner seal 41 with respect to the container 10 (FIGS. 1 and 2).

  The container 10 is a plastic container that forms an upward mouth 12 in the body 11. A male screw 13 for the cap 20 is formed on the outer periphery of the mouth portion 12, and an outer flange 14 that forms the upper end surface of the mouth portion 12 is formed on the upper end of the mouth portion 12. The lower side of the outer flange 14 is continuous with the large-diameter cylindrical portion that forms the male screw 13 via the slope 16. Further, the lower side of the male screw 13 continues to the body portion 11 via an annular rib 15 having substantially the same diameter as the maximum outer diameter of the cap 20.

  On the outer periphery of the cap 20, knurlings 21, 21. On the inner periphery of the cap 20, a female screw 22 that matches the male screw 13 on the container 10 side is formed. A small-diameter inner ring 23 and a large-diameter seal ring 24 are concentrically formed on the top surface of the cap 20. The inner ring 23 hangs longer than the seal ring 24, is smoothly curved outward at the intermediate portion, and the lower half is smoothly thinned (FIG. 3). On the outer periphery of the intermediate portion of the inner ring 23, an annular engagement protrusion 23a that bulges outward is formed. Note that the maximum outer diameter of the inner ring 23 including the engagement protrusion 23 a is adapted to the inner diameter of the mouth portion 12 of the container 10. The seal ring 24 is formed in a simple isosceles triangle in cross section.

  The spacer 30 is arranged with upwardly engaging pieces 32, 32... Along the inner circumference of the ring-shaped flange plate 31 (FIGS. 1 and 4), and the ring-shaped holding portion 33 is arranged along the outer circumference of the flange plate 31. It is formed vertically. 4A and 4B are a top view of the spacer 30 and an enlarged cross-sectional view corresponding to the line XX in FIG. 4A, respectively.

  The engaging pieces 32, 32... Are curved in an arc shape along the inner circumference of the flange plate 31, respectively, and are arranged in a circular shape as a whole. In addition, a horizontally long engagement protrusion 32 a is formed on the inner upper portion of each engagement piece 32. On the other hand, on the inner periphery of the holding portion 33, an annular engagement protrusion 33a bulging inward is formed. Note that the holding portion 33 may be divided into a plurality of pieces following the engagement pieces 32, 32... Instead of being continuous in a ring shape.

  The circular inner seal 41 is formed to have a larger diameter than the outer diameter of the upper end surface of the mouth portion 12 of the container 10 (FIGS. 1 and 3). In addition, the inner diameter of the holding portion 33 on the outer periphery of the spacer 30 is adapted to the diameter of the inner seal 41, and therefore the inner seal 41 is placed on the upper portion of the holding portion 33 via the engagement protrusion 33 a of the holding portion 33. It can be stored and held on the lower surface side of the spacer 30.

  On the other hand, the engagement pieces 32, 32... On the inner periphery of the spacer 30 are arranged so as to match the outer diameter of the inner ring 23 of the cap 20. Therefore, the spacer 30 fits the engagement pieces 32, 32... To the outer side of the inner ring 23, and the engagement protrusions 32a, 32a. By being elastically engaged with the cap 20, the cap 20 can be detachably mounted. In addition, the spacer 30 in the cap 20 has the upper end of each engagement piece 32 inserted between the inner ring 23 and the seal ring 24 and comes into contact with the top surface of the cap 20, and the outer peripheral portion of the flange plate 31 is the cap 20. By engaging with the downward stepped portion 25 of the inner peripheral upper portion from below, the cap 20 is correctly positioned. Therefore, the spacer 30 holding the inner seal 41 is built in the cap 20, and the cap 20, the spacer 30, and the inner seal 41 are assembled together to form a container lid.

  When the contents not shown are stored in the container 10 and the cap 20 is attached to the mouth portion 12 together with the spacer 30 and the inner seal 41, the inner seal 41 can be correctly set on the mouth portion 12 (FIGS. 2 and 3). . The cap 20 at this time presses the upper end of the upward engagement pieces 32, 32... Of the spacer 30 downward by the top surface, and presses the outer peripheral portion of the spacer 30 downward by the step portion 25. The screw-in limit by the female screw 22 is restricted, and the inner seal 41 is sandwiched between the upper end surface of the mouth portion 12 and the lower surface of the spacer 30 so as to be in close contact with both. The inner ring 23 of the cap 20 is formed to a length that does not contact the inner seal 41 on the mouth portion 12.

  Subsequently, when the container 10 is passed through a heating region of an electromagnetic induction heater (not shown) and electromagnetic induction heating is performed, the aluminum foil in the inner seal 41 is heated, and the inner seal 41 is moved to the upper end surface of the mouth portion 12 of the container 10, The container 10 can be thermally bonded to both lower surfaces of the spacer 30 to seal the container 10 in a completely airtight state. At this time, since the inner seal 41 has a larger contact area with the lower surface of the spacer 30 than a contact area with the upper end surface of the mouth portion 12, the adhesion force on the spacer 30 side can be made larger than the adhesion force on the container 10 side. .

  When opening the container 10, the cap 20 is removed from the mouth 12 of the container 10. At this time, the engagement between the inner ring 23 of the cap 20 and the engagement pieces 32, 32... Of the spacer 30 is released, and the spacer 30 and the inner seal 41 remain on the container 10 side. Therefore, at the upper end of the mouth portion 12, when the finger is put on the holding portion 33 on the outer periphery of the spacer 30 depending on the outside of the outer flange 14 and the spacer 30 is turned upward (FIG. 5), the upper end surface of the mouth portion 12 is The inner seal 41 can be smoothly peeled off to open the mouth portion 12. This is because the inner seal 41 is adhered to the spacer 30 side with a larger adhesive force than the container 10 side. The inner seal 41 and the spacer 30 peeled from the mouth portion 12 in this way may be removed from the mouth portion 12 and discarded as they are.

  After the contents in the container 10 are taken out, the cap 20 is attached to the mouth portion 12 and the container 10 is resealed (FIGS. 6 and 7). At this time, the inner ring 23 of the cap 20 is fitted into the mouth portion 12 of the container 10 to hermetically seal the mouth portion 12, and the seal ring 24 of the cap 20 abuts against the upper end surface of the mouth portion 12, and the cap 20 This restricts the screwing limit and assists the airtightness of the mouth portion 12. Thereafter, the container 10 can be repeatedly opened and resealed by removing the cap 20 and reattaching it.

  The mouth portion 12 of the container 10 is chamfered 12a on the inner surface on the upper end (FIG. 3). Therefore, when the inner seal 41 is peeled off from the upper end surface of the mouth portion 12, even if the sealant layer of the inner seal 41 remains on the upper end surface of the mouth portion 12, there is no possibility of affecting the inner diameter of the mouth portion 12. Therefore, the inner ring 23 of the cap 20 always adheres correctly to the inner surface of the mouth portion 12 (FIG. 7), and the airtightness when resealed by the cap 20 is sufficiently good.

  In the above description, the container 10 is integrally molded with HDPE or PP, a mixed material of PE, the cap 20 with PP or HDPE, and the spacer 30 with a plastic material such as LDPE. Moreover, in order to make the adhesive force with respect to the spacer 30 larger than the adhesive force with respect to the container 10, the inner seal 41 can adjust not only the contact area with respect to each but also the material of the sealant layer in contact with each. is there.

  Instead of holding the inner seal 41 via the holding portion 33, the inner seal 41 may be attached to the lower surface of the spacer 30 in advance and held in the cap 20 together with the spacer 30. That is, the inner seal 41 may be bonded to the container 10 side and the spacer 30 side at the same time, the spacer 30 side may be bonded first, and the container 10 side may be bonded later. Further, the inner seal 41 may be bonded by high-frequency heating such as dielectric heating or microwave heating instead of electromagnetic induction heating, or by various adhesives. Furthermore, the inner seal 41 can adopt any configuration as long as airtightness and adhesiveness are necessary and sufficient.

  The present invention can be widely and suitably applied to the use of airtightly storing arbitrary products including health functional foods in addition to pharmaceuticals such as tablets and capsules and quasi drugs.

DESCRIPTION OF SYMBOLS 10 ... Container 12 ... Mouth part 20 ... Cap 23 ... Inner ring 30 ... Spacer 32 ... Engagement piece 33 ... Holding part 41 ... Inner seal

Patent applicant Shingo Chemical Co., Ltd.

Claims (4)

A cap with an inner ring that fits into the mouth of the container and seals, a ring-shaped spacer that is detachably mounted on the cap, and a diameter larger than the outer diameter of the upper end surface of the mouth of the container. An inner seal held on the lower surface side, and the spacer detachably engages an outer periphery of the inner ring with a plurality of upward engaging pieces arranged along an inner periphery . The cap is attached to the mouth of the container and set together with the spacer on the mouth of the container, and the upper end surface of the mouth of the container and the lower surface of the spacer are adhered, and the adhesive force on the spacer side is adhered to the container side A container lid characterized by being larger than force.   The container lid according to claim 1, wherein the spacer holds the inner seal via a holding portion that hangs along the outer periphery. Said cap, said spacer, when attached to the mouth of the container together with the inner seal, according to claim 1 or claim 2, wherein the pressing and an outer peripheral portion of the upper end and the spacer of the engaging piece downward The container lid. The packaging container which consists of a container and the cover body of the container in any one of Claims 1 thru | or 3 with which the opening part of this container is mounted | worn.

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