JPH0524549U - Water intrusion prevention cap - Google Patents

Abstract

(57) [Abstract] [Purpose] Even if the internal pressure of the container is reduced by hot filling and cooling, the pressure of the internal space of the cap formed by the cap body and the upper lid is equal to the external pressure to suck the cooling water. It is possible to effectively prevent the generation of mold and the like in the space inside the cap. [Composition] In a cap comprising a cap body and a top lid, the top plate of the cap body has a circumferential side wall portion surrounding the pouring opening and abutting against the top lid when the top lid is fitted, A communication port is provided so that the space formed by the top plate portion and the circumferential side wall portion of the cap body communicates with the outside air.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cap that can be suitably applied to contents that require hot filling or retort sterilization, and more specifically, the cap is depressurized by cooling after hot filling and the like. Regarding a cap that can prevent cooling water from entering the cap.

[0002]

[Prior art and its problems]

 The cap, which consists of a cap body with a spout that fits into the mouth of the container and an upper lid that is fitted to cover the spout of the cap body, is easy to open and close and has excellent sealing performance. Therefore, it is widely used as a cap for food and other fields.

On the other hand, natural fruit juices, seasonings and the like are subjected to hot filling or retort sterilization in order to ensure the preservation of the contents when filled and sealed in a container. The sealed or sealed / retort sterilized container is finally cooled by cooling water, so the sealed container is in a decompressed state due to temperature change from high temperature to low temperature. When the above-mentioned cap is applied to such contents, the inside of the container is in a decompressed state due to a temperature change from high temperature to a low temperature, and accordingly, the space inside the cap formed by the upper lid and the inner lid is also in a decompressed state. There is a tendency to suck the cooling water. The water sucked into the space inside the cap causes mold and the like, which is not only hygienically unfavorable but also causes a discomfort to consumers.

In order to solve such a problem, it is conceivable to tightly fit the upper lid of the cap and the cap body, but this is not preferable for enabling easy opening and closing. In particular, this problem is a so-called two-piece type in which the cap body is composed of a fitting part that fits with the container mouth and a shell that covers the fitting part, and a minute gap is formed between the shell and the fitting part. Therefore, there is no problem because the internal space of the cap becomes almost the same pressure as the outside air, but it is necessary to improve the so-called one-piece cap in which the cap body is integrally formed.

Therefore, the object of the present invention is that even if the pressure inside the container is reduced by hot filling, retort sterilization, and cooling, the pressure in the space inside the cap formed by the cap body and the upper lid is equal to the external pressure. Another object of the present invention is to provide a cap capable of effectively preventing generation of mold and the like in the space inside the cap without sucking cooling water.

[0006]

[Means for Solving the Problems]

 According to the present invention, the cap body is composed of the top plate portion and the skirt portion hung from the top plate portion, the top plate portion has the pouring opening, and the cap main body is capable of fitting with the container mouth portion. In a cap including a top plate portion and a skirt portion hanging from the top plate portion, the cap main body top plate portion is provided with a pouring opening and surrounds the pouring opening. , The end portion has a circumferential side wall portion that comes into contact with the upper lid when the upper lid is fitted, and communicates so that the space formed by the top plate portion of the cap body and the circumferential side wall portion communicates with the outside air. A cap is provided that features a mouth.

[0007]

[Work]

 As mentioned above, if the contents are inferior in shelf life, such as food products such as natural fruit juice and seasonings, it is necessary to carry out hot sterilization at the same time when filling, and it is also necessary to cool water in hot containers. Since the temperature is rapidly cooled by applying heat, the inside of the container is depressurized due to the temperature change from high temperature to low temperature. Along with this, the center of the top plate of the cap body is recessed inward of the container, and the space inside the cap is also depressurized. When the cap body and top cover are fitted together, there is no risk of liquid leaks in the contents during normal use, but there is a large amount of cooling water adhering to the cap, If this happens, some water will enter the cap, and the presence of this water will cause mold and the like, which will significantly impair the commercial value.

In the present invention, the inner space of the cap is divided into two parts, the opening part for pouring and the outer peripheral part thereof, the outer part is made to have the same pressure as the outside air of the top plate of the cap body, and the opening part for pouring is sealed. With this state, even if the pouring opening portion is decompressed due to the decompression inside the container, there is no change in the pressure at the outer peripheral portion, so that the cooling water is not sucked. Further, in the present invention, the peripheral side wall surrounding the pouring opening is provided so as to contact the top surface of the inside of the upper lid when the upper lid is fitted. There is no spillage and the cap can be sealed.

[0009]

【Example】

 FIG. 1 is a perspective view showing a state in which an upper lid is opened in an example of a cap of the present invention. In FIG. 1 and FIG. 2 which is a cross-sectional view of a main part of a normal body in which the upper lid is closed, the cap 1 is a container opening 2 An upper lid 4 that covers the cap body 3 and the cap body top plate portion that are fitted together is connected by a hinge 5. At the center of the top plate 6 of the cap body 3, an opening 7 for pouring out the contents is formed so as to be divided by a score and can be pulled out by a pull ring 8. Further, a peripheral side wall portion 9 is provided so as to surround the pouring opening portion 7 at such a height that it comes into contact with the inner top surface 11 of the upper lid 4 when the end portion 10 is closed.

The inner space of the cap formed by the top plate portion 6 of the cap main body 3, the skirt portion 12 of the upper lid 4 and the inner top surface 11 is the circumferential side wall 9 and the pouring opening portion 13 and the outer peripheral portion 14. It is divided into two parts. On the peripheral edge portion 15 of the cap body top plate portion 6, a fitting circumferential protrusion 16 for fitting with the upper lid 4 is provided. A communication port 17 is cut out in a tapered shape from the top plate portion of the outer peripheral portion 14 of the inner space of the cap at a position where the hinge 5 is opposed to the peripheral edge portion 15 of the cap body top plate portion 6. As a result, the outer peripheral portion 14 is in a state of communicating with the outside air.

The upper lid 4 is provided with a fitting circumferential projection 18 that fits with the fitting circumferential projection 16 of the cap body, below the inside of the skirt portion 12. In addition, a circumferential projection 19 is provided on the inner top surface 11 so as to be in contact with the inside of the circumferential side wall of the cap body, thereby ensuring the sealed state of the spout opening portion 13.

In the above embodiment, the cap body and the upper lid are integrated by the hinge, but the present invention is not limited to this, and the same applies even if the upper lid portion is a cap that can be separated from the cap body. Can be adopted.

The communication port provided in the cap is provided in the cap body in the above embodiment, but the object of the present invention can be achieved by providing it in the upper lid, but it is provided as a notch in the peripheral edge of the cap body top plate portion. It is particularly suitable as a clue for opening the stopper. At this time, if the hinge cap is used, it is necessary to provide this notch at a position facing the hinge. The shape of the communication port is not limited to the tapered notch as shown in FIG. 1, but a slit at the lower end of the upper lid skirt can be used as long as the space inside the cap communicates with the outside air.

When a surface that is almost parallel to the side surface of the cap is formed as in the communication port shown in FIG. 1, cooling water is likely to hit the notch surface, but this notch surface can be rubbed with satin or the like. This is preferable because it improves the water repellency and further prevents the cooling water from adhering to the notch surface.

By providing a liner material on the inner side of the top lid top surface at the portion with which the distal end of the circumferential side wall of the cap body abuts, the sealing performance can be further ensured.

The cap of the present invention can be easily molded by injection molding of synthetic resin or the like. The resin used is not limited to this, but from the viewpoint of hygiene, heat resistance, etc., a polyethylene resin or a polypropylene resin can be preferably used. Further, the cap of the present invention is applicable to various containers such as a glass container, a plastic container, a metal container and the like without being limited to the type of the container.

[0017]

[Effect of the device]

 According to the present invention, even when it is applied to a content that requires a hot filling process or a cooling process, water is prevented from entering the cap with a simple structure without lowering the sealing property of the cap. It was possible to effectively prevent the generation of mold in the cap. When hot filling and cooling were performed using a cap of the present invention and a conventional cap having no communication port, 25 of the caps of the present invention contained none of the water. However, with the conventional cap that did not have a communication port, 3 of the 25 caps had water intruded.

[Brief description of drawings]

FIG. 1 is a perspective view of an example of a cap of the present invention.

FIG. 2 is a cross-sectional view of an essential part of an example of a cap of the present invention.

[Explanation of sign]

 1 Cap 3 Cap Main Body 4 Upper Lid 9 Circumferential Side Wall 17 Communication Port

Claims (5)

[Scope of utility model registration request] 1. A cap main body comprising a top plate and a skirt hanging from the top plate, a cap main body having a spout opening in the top plate and capable of fitting with a container mouth, and a top plate covering the cap main body top plate. And a skirt that hangs from the top plate,
In a cap including a cap body and an upper lid fitted with the cap body, the cap body top plate portion is provided with a pouring opening, surrounds the pouring opening, and an end portion of the cap body top plate portion is attached to the upper lid when the upper lid is fitted. A cap having a circumferential side wall portion that abuts, and a communication port is provided so that a space formed by the upper lid, the top plate portion of the cap body, and the circumferential side wall portion communicates with outside air. 2. The cap according to claim 1, wherein the communication port is provided by a notch provided around the top plate portion of the cap body. 3. The cap according to claim 1, wherein the cap body and the upper lid are hinged to each other. 4. The cap according to claim 2, wherein the notch is located symmetrically with the hinge. 5. The cap according to any one of claims 1 to 4, wherein an inner top surface of the upper lid is provided with a circumferential protrusion that is in contact with an inner side of a circumferential side wall portion of the cap body.