JP4863369B2 - Food containers - Google Patents

Description

  The present invention is for foods that can prevent the container body from being depressurized and deformed due to the reduced pressure in the container body when the high-temperature food subjected to heat treatment or high-temperature sterilization treatment is cooled in the container body. It relates to the container.

  For example, food containers such as squid fries, squid geese, yakitori, and tonchan that have been widely used have been formed by sealing a cylindrical container body made of PET (polyethylene terephthalate) resin by screwing a wide-mouth cap. Such foods are usually stored in the container body immediately after being subjected to heat treatment or high-temperature sterilization treatment, and thereafter capped and sealed immediately.

However, when high-temperature food that has been subjected to heat treatment or high-temperature sterilization is cooled in the container body, the container body may be decompressed, causing the container to be recessed and deformed, resulting in a reduction in commercial value. there were.
In order to prevent this pressure reduction, it is conceivable to simply provide a vent hole or groove for ventilation. In this case, the liquid sauce on the food may leak out through the vent hole. In order to prevent this, it is necessary to stick the outer periphery of the cap with tape. However, since the vent holes and the like are also closed when pasted with a tape, it becomes impossible to prevent the dent deformation, and the method of simultaneously solving the two conflicting problems of ensuring air permeability and preventing sagging leaks. Development was necessary.

Therefore, as a method for preventing decompression in the food packaging body, for example, as disclosed in Patent Document 1, a sheet-like heat-welded plastic sanitizing filter having air permeability between the opening end of the container body and the container lid is used. It has been proposed to prevent the container from being deformed under reduced pressure by interposing it and allowing the filter portion to conduct air.
However, when the method of Patent Document 1 is used, it is necessary to heat the filter many times in order to thermally weld the filter between the opening end of the container body and the container lid, and the sealing work becomes complicated. In addition, there is a problem in that an extra heat-welding plastic sanitizing filter is required, resulting in an increase in cost.
JP 11-124175 A

  The present invention solves the above-mentioned problems, and even when a high-temperature food subjected to heat treatment or high-temperature sterilization treatment is cooled in the container body, the container body is not depressurized, and the container is recessed. In addition to preventing deformation, the sagging can be prevented from leaking out of the container, the structure of the deformation preventing function due to decompression is simple, capping work is easy, and airflow is ensured. The present invention has been completed for the purpose of providing a food container that does not require preparation of a separate member and can be produced at low cost.

The food container of the present invention, which has been made to solve the above problems, is such that the mouth of the container body is screwed and sealed with a wide-mouth cap, and the outer periphery of the lower part of the cap and the bead of the container body are surrounded by tape. In the pasted food container, a vertical ventilation groove is formed in the outer peripheral wall of the wide-mouthed cap, and a portion that comes into contact with the top of the mouth of the container body on the back surface of the cap top plate communicates with the ventilation groove. Forms a recess for ventilation, the ventilation groove and the recess communicate with each other in a cap-covered state, and a tape is applied with the upper portion of the ventilation groove open, so that the container body can be attached even if a tape is applied. The inside air permeability is ensured.

  The food container of the present invention has a structure in which a vertical ventilation groove is formed on the outer peripheral wall of the cap, and a recess for ventilation communicating with the ventilation groove is formed on the back surface of the cap top plate. And the outside communicate with each other through the ventilation recess and the ventilation recess, so that the inside of the container body is depressurized even when high-temperature food that has been subjected to heat treatment or high-temperature sterilization treatment is cooled in the container body. Therefore, the dent deformation of the container can be prevented. In addition, the concave portion for venting is small enough to ensure air permeability but prevent sagging leakage, thus preventing the sagging from leaking out of the container.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall front view showing a container for containing a sauced food such as squid fried, squid, yakitori, or tonchan, and FIG. . 1 and 2, 1 is a cylindrical container body having a wide mouth 3 made of, for example, PET (polyethylene terephthalate) resin, and 2 is a wide mouth made of polypropylene resin that is screwed to seal the mouth of the container body 1 It is a cap. Reference numeral 4 denotes a bead which is an annular protrusion formed simultaneously with the forming of the container, and 5 denotes a bead 4 which surrounds the outer peripheral surface of the bead 4 and the outer periphery of the lower portion of the cap 2 to prevent sagging and is unopened. It is a tape for indicating.

The cap 2 has a gate-shaped cross section in which an outer peripheral wall 7 is suspended from the peripheral edge of a disk-shaped top plate 6. A screw formed in the mouth 3 of the container body 1 is formed on the inner surface of the peripheral wall 7. A screw 7a to be screwed with 3a is formed. A vertical ventilation groove 8 is formed on the outer peripheral wall 7, and a ventilation recess 9 is formed on the back surface of the cap top plate 6 corresponding to the ventilation groove 8.
FIG. 3 is a plan view of the cap 2 as viewed from the back side, and eight vertical ventilation grooves 8 are formed uniformly in the circumferential direction of the cap. Corresponding to this, there are also eight recesses 9 for ventilation. Individually formed.
As shown in FIG. 2, when the cap is put on, the lower end portion of the outer peripheral wall 7 and the upper end surface of the bead 4 are not in close contact with each other, and a slight gap of about 1 mm is left. .

FIG. 4 is an enlarged plan view showing the main part of the ventilation groove 8 and the recess 9 for ventilation. The vertical ventilation grooves 8 formed on the outer peripheral wall 7 include a plurality of vertical ventilation grooves 8 (3 in the illustrated example). This is formed as a valley having a width of about 1 to 2 mm. Reference numeral 5 denotes a tape affixed to prevent sagging leakage, and a ventilation groove 8 for external air conduction is formed between the tape 5 and the tape 5.
That is, when the tape 5 is affixed, a slight gap between the lower end portion of the outer peripheral wall 7 and the upper end surface of the bead 4 is closed, and normally the air permeability is lost. By providing it, air permeability is ensured. That is, even if the tape 5 is applied, the tape 5 does not cover the protrusion 9 entirely, and the ventilation groove 8 is opened at the upper end portion, and air permeability is ensured.

  FIG. 5 is an enlarged perspective view showing a main part of the ventilation groove 8 and the recess 10 for ventilation. The recess 10 for ventilation is formed in a portion in contact with the top of the mouth of the container body on the back surface of the cap top so as to penetrate the ventilation groove 8. Grooves are formed on the periphery of the plate 6 with a feeling of cutting with a chisel so that it gradually becomes deeper toward the outer peripheral wall 7, the width is about 5 to 10 mm (preferably 7 to 9 mm), and the maximum depth is About 0.1 to 0.2 mm.

FIG. 6 is an explanatory view showing a contact state between the mouth portion 3 of the container main body 1 and the top plate 6 when capping. When the cap 2 is screwed, the top plate 6 is in close contact with the top of the mouth portion 3 in principle. However, a slight gap is formed between the top plate 6 and the top of the mouth portion 3 in the portion of the concave portion 10 for ventilation, so that the air permeability is provided.
However, the concave portion 10 for ventilation is a very shallow concave groove, which ensures sufficient air permeability but reliably prevents viscous leakage.

In the food container configured as described above, for example, squid fries and squid are stored in the container body immediately after being subjected to heat treatment or high-temperature sterilization treatment, and then immediately capped to prevent contamination with germs. Seal. Next, the outer periphery of the cap is affixed with tape to prevent sagging leakage and to ensure that the cap has not been opened.
After that, it is left to cool, but in the conventional case, a high temperature food was cooled in the container body, the inside of the container body was in a reduced pressure state, and the phenomenon that the container was recessed and deformed occurred On the other hand, according to the present invention, a vertical ventilation groove is formed on the outer peripheral wall of the wide-mouth cap, and a recess for ventilation is formed on the back surface of the cap top plate corresponding to the ventilation groove. Since the outside air entering from a slight gap between the upper portion and the upper end surface of the bead is conducted into the container main body through the ventilation recess, the inside of the container main body is not decompressed. As a result, the phenomenon that the container is recessed and deformed is surely prevented. Even if the outer periphery of the cap is affixed with tape, the container body is not in a reduced pressure state because it is electrically connected to the container body through the vertical ventilation groove. In addition, the concave portion for ventilation is a very shallow concave groove, and has a shape that ensures sufficient air permeability but prevents leakage of sagging, so that there is no problem of sagging outside.

As is clear from the above description, the present invention can be applied to the dent deformation of the container without depressurizing the container body even when the high-temperature food subjected to the heat treatment or high-temperature sterilization treatment is cooled in the container body. It is possible to prevent the sagging from leaking out of the container. Furthermore, the structure of the deformation prevention function due to decompression is simple, the capping work is easy, there is no need to prepare a separate member for ensuring ventilation, and the production cost can be reduced. It is what you have.
Therefore, the present invention is extremely large in that it contributes to industrial development as a novel food container that solves the conventional problems.

1 is an overall front view showing an embodiment of the present invention. It is an expanded sectional view of the important section showing the state where a container body was covered with a cap. It is the top view seen from the back side of a cap. It is an enlarged plan view which shows the principal part of the ventilation groove and the recessed part for ventilation | gas_flowing. It is an expansion perspective view which shows the principal part of the ventilation groove and the recessed part for ventilation | gas_flowing. It is explanatory drawing which shows the contact state of the opening part of a container main body at the time of capping, and a top plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container body 2 Cap 3 Portion 3a Screw 4 Bead 5 Tape 6 Top plate 7 Peripheral wall 7a Screw 8 Ventilation groove 9 Projection 10 Recess for ventilation

Claims (4)

A container for food, in which the mouth of the container body is screwed and sealed with a wide mouth cap, and the outer periphery of the lower part of the cap and the bead of the container body are pasted so as to be surrounded by tape. forming a direction of the ventilation groove, said vent in a state where this is the portion in contact with the mouth top of the container body of the cap top plate back surface so as to communicate with the ventilation grooves to form a recess for venting, covered with a cap A food container , wherein the groove and the recess communicate with each other and the tape is applied in a state where the upper portion of the ventilation groove is opened, so that the air permeability in the container body is secured even when the tape is applied. .   The food container according to claim 1, wherein the vertical ventilation grooves formed on the outer peripheral wall are valleys formed between the plurality of protrusions.   The food container according to claim 1 or 2, wherein a plurality of longitudinal ventilation grooves are formed uniformly in the circumferential direction of the cap.   The recess for ventilation formed on the back surface of the cap top plate is a recess having a width of about 5 to 10 mm and a maximum depth of about 0.1 to 0.2 mm formed between the top of the mouth of the container body. The food container according to any one of claims 1 to 3, which ensures air permeability but prevents sagging leakage.

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