JP3105649U - Container cap - Google Patents

Abstract

An object of the present invention is to provide a cap for a container, in which a gap does not occur between the container and the mouth even if the mounted body becomes hot due to the heat of the contents filled in the container.
The container cap of the present invention is a synthetic resin container cap having a mounting body (2) to be mounted on an opening (1) of the container and a lid for closing an opening (3) of the mounting body (2). The mounting body 2 has an outer peripheral portion 5 and an inner peripheral portion 6, and the mouth 1 of the container is inserted between the outer peripheral portion 5 and the inner peripheral portion 6. A ring-shaped member 7 having higher heat resistance than the mounting body 2 is provided.
[Selection diagram] FIG.

Description

  The present invention relates to a cap for a container to be attached to the mouth of a container containing a beverage such as tea, a seasoning such as soy sauce and mirin, and other appropriate liquid contents.

  2. Description of the Related Art Conventionally, a cap for a synthetic resin container having a mounting body adapted to be mounted on a mouth of a container and a lid closing an opening of the mounting body is used for liquid contents such as tea, soy sauce and mirin. It is used for containers such as PET resin bottles and glass bottles that are sold after filling.

  By the way, in general, the content filled in a container is 65 ° C. or lower, but by developing a technique for crystallizing the PET resin, it is possible to improve the heat resistance of the mouth of the PET resin bottle. As a result, it has been required to fill a container with contents at a high temperature of about 65 ° C. to 95 ° C.

However, the conventional container cap as described in Patent Literature 1 is made of polyethylene as a main material, and when filled with high-temperature contents, shrinks or deforms due to heat, and may be in contact with the mouth of the container. There has been a problem that a gap is formed between them and sealing performance is impaired.
Japanese Utility Model Registration No. 3093915

  Therefore, an object of the present invention is to provide a container cap which does not have a gap between the container and the mouth even when the temperature of the mounted body becomes high due to the heat of the contents filled in the container.

  The container cap of the present invention is a synthetic resin container cap having a mounting body 2 to be mounted on the mouth 1 of the container, and a lid 4 closing the opening 3 of the mounting body 2. The mounting body 2 has an outer peripheral portion 5 and an inner peripheral portion 6, and the mouth 1 of the container is inserted between the outer peripheral portion 5 and the inner peripheral portion 6. A ring-shaped member 7 having higher heat resistance than that of the ring-shaped member 2 is provided.

  The ring-shaped member 7 can have a heat-resistant temperature of 65 ° C. or higher.

  Further, the main material of the mounting body 2 may be made of polyethylene, and the ring-shaped member 7 may be made of polypropylene.

  The container cap of the present invention has the above-described configuration, and even if the mounting body 2 tries to shrink or deform due to the heat of the contents filled in the container, the ring provided inside the inner peripheral portion 6 thereof. Since shrinkage and deformation are suppressed by the shape member 7, a gap is prevented from being formed between the inner peripheral portion 6 and the mouth 1 of the container, and high sealing performance is obtained.

  Further, if the heat-resistant temperature of the ring-shaped member 7 is 65 ° C. or more, the ring-shaped member 7 can be mounted on a container made of PET resin or the like in which the opening 1 filled with relatively high-temperature contents is crystallized.

  If the main raw material of the mounting body 2 is polyethylene and the ring-shaped member 7 is made of polypropylene, the mounting body 2 can be configured to be capable of pull-top opening, and the ring-shaped member 7 has a heat resistant temperature. Therefore, even when the container is filled with relatively high-temperature contents, a gap is prevented from being formed between the inner peripheral portion 6 and the mouth 1 of the container.

  The container cap of the present invention is a synthetic resin container cap having a mounting body 2 to be mounted on the mouth 1 of the container, and a lid 4 closing the opening 3 of the mounting body 2. The mounting body 2 has an outer peripheral portion 5 and an inner peripheral portion 6, and the mouth 1 of the container is fitted between the outer peripheral portion 5 and the inner peripheral portion 6. Also, a ring-shaped member 7 having high heat resistance is provided.

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

  1 is a front view of the container cap of the present invention, FIG. 2 is a sectional view thereof, FIG. 3 is a front view of the mounting body 2, FIG. 4 is a partially cutaway perspective view of a ring-shaped member 7, and FIG. It is sectional drawing at the time of attaching a cap to the mouth part 1 of a container.

  The mounting body 2 is made of polyethylene and has a circular cross section, and includes an outer peripheral portion 5 and an inner peripheral portion 6 as shown in FIGS. The outer peripheral portion 5 has a shape that protrudes outward from about half the height of the inner peripheral portion 6 and extends downward. The inner peripheral part 6 extends along the inner surface of the mouth part 1 of the container so as to protrude upward. A screw is formed on the outer periphery of the upper part 8 of the inner peripheral part 6 so that the lid 4 can be screwed. Further, a flange 10 of the lid 4 is fitted to the outer periphery of the upper portion 9 of the outer peripheral portion 5, and a lower end 11 of the outer peripheral portion 5 has a projection on the inside, and a mouth portion of the container is provided. The recess 12 is formed in the recess 1.

  The inner peripheral portion 6 is integrally provided with an opening 3 that can be opened by a pull-top type inside the upper end thereof. The opening 3 has a cylindrical shape with a circular cross section, and its upper part projects above the mouth part 1 of the mounted container, and its lower part extends downward with a slight clearance from the inner peripheral part 6.

  A content blocking wall 13 is formed inside the lower end of the upper portion of the opening 3. A thin portion 14 is formed in the content blocking wall 13, and the content blocking wall 13 can be opened by pulling a pull tab 15 connected to the inside of the thin portion 14.

  The ring-shaped member 7 is made of polypropylene. The ring-shaped member 7 is configured not to fall off from the mounting body 2 in a state where its outer peripheral surface is in contact with the inner surface of the inner peripheral portion 6 of the mounting body 2. As shown in FIG. 4, the thickness of the ring-shaped member 7 is reduced so that the upper portion 16 is fitted into the gap between the inner peripheral portion 6 of the mounting body 2 and the lower portion of the opening 3. The lower portion 17 is thick and its lower end is positioned at the same height as the lower end of the inner peripheral portion 6 of the mounting body 2.

  The lid 4 is made of polyethylene and is detachably attached to the mounting body 2 by screwing. Screws are formed inside the peripheral wall of the lid 4 so as to screw with the screws of the inner peripheral portion 6 of the mounting body 2. The lid 4 may be formed integrally with the mounting body 2 via a hinge.

  In order to mount the container cap on the mouth 1 of the container, first, the mouth 1 of the container is inserted into the gap 18 between the outer peripheral portion 5 and the inner peripheral portion 6 of the mounting body 2 to which the ring-shaped member 7 is attached. Insert

  Then, the contents such as tea, which has been heated, are filled in a container, and the container is left for a while to cool naturally. The mounting body 2 tends to shrink and deform due to the heat of the contents, but the ring-shaped member 7 has a high heat-resistant temperature and is unlikely to shrink and deform. Therefore, the inner peripheral portion 6 of the mounting body 2 along the inner surface of the container mouth 1 is suppressed from shrinking and deforming, and is kept in contact with the inner surface of the container mouth 1 as shown in FIG. A sealed state in the container can be securely maintained without a gap between the inner peripheral portion 6 and the mouth 1 of the container.

  Note that the ring-shaped member 7 may have a heat-resistant temperature higher than the temperature of the mounting body 2 or the mouth 1 of the container when the contents are filled. Can be mounted on a container made of PET resin or the like in which the opening 1 filled with the relatively high-temperature contents is crystallized.

  Next, the results of performance tests on this container cap will be described. Table 1 shows the measurement results (average values) of the reduced pressure values when the above-mentioned container cap and 16 sets of containers were filled.

  In this test, the container was a heat-resistant PET bottle (capacity: 330 cc) in which the mouth 1 was crystallized, tap water was used as the filling liquid, the temperature of the filling liquid in the container was 97 ° C to 99 ° C, and The temperature was 92 ° C (± 2 ° C). And what was cooled naturally was put into the storage of 5 degreeC, 25 degreeC, and 40 degreeC, and the reduced pressure value was measured after 24 hours, one week, and one month. The measurement liquid temperature is 15 ° C.

  From the measurement results, it was found that the container cap of the present invention provided high hermeticity at any storage temperature.

  The container cap of the present invention is not limited to the shapes and materials shown in this embodiment, but can be appropriately modified and implemented.

  It can be used as an alternative to the conventional container cap.

It is a front view of the container cap of embodiment of this invention. It is sectional drawing of the cap for containers of embodiment of this invention. It is a front view of the mounting body of the container cap of embodiment of this invention. It is a partially cutaway perspective view of the ring-shaped member of the container cap of this embodiment of this invention. It is sectional drawing at the time of attaching the cap for containers of embodiment of this invention to the mouth part of a container.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Mouth part of container 2 Mounting body 3 Opening part 4 Lid 5 Outer peripheral part 6 Inner peripheral part 7 Ring-shaped member

Claims (3)

  A container cap made of a synthetic resin having a mounting body (2) to be mounted on the mouth (1) of the container and a lid (4) for closing an opening (3) of the mounting body (2). The mounting body (2) has an outer peripheral part (5) and an inner peripheral part (6), and the mouth part (1) of the container is inserted between the outer peripheral part (5) and the inner peripheral part (6). And a ring-shaped member (7) having higher heat resistance than the mounting body (2) is provided inside the inner peripheral portion (6).   The container cap according to claim 1, wherein the heat resistance temperature of the ring-shaped member (7) is 65 ° C or higher.   The container cap according to claim 1, wherein a main material of the mounting body (2) is polyethylene, and the ring-shaped member (7) is made of polypropylene.