JPH0226868Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a container lid structure.

In recent years, a double structure has been created by recessing the center part of the upper surface of the lid body, which can be freely fitted into the container body, and fitting a lid plate separate from the lid body into the recessed part. A container has been proposed in which a cooling medium such as a rod-shaped cold storage material or a refrigerant can be stored inside the container, that is, in a recessed space.However, if the bottom wall of the storage chamber is flat, The stored cooling medium may move easily during transportation and may become biased to one side.
There is a risk that the cold air circulation holes formed at the bottom of the recessed portion may be blocked, thereby impairing the cooling and cold insulation effect.

Therefore, in the present invention, as the lid structure of the container, in particular, a plurality of recesses having a curved cross section for fitting the cooling medium are provided at predetermined intervals on the upper surface of the bottom wall of the storage chamber, and a lower portion on the inner peripheral surface of the recess is provided. A groove is formed in the longitudinal direction of the recess, and a groove is formed across the recess in a direction perpendicular to the recess, and these grooves are used as a gap retaining part for cold air circulation when the cooling and cold storage medium is inserted. Holes for cold air circulation are provided in the grooves and outside the recesses, so that a cooling cold storage medium such as a rod-shaped cold storage material can be held so that it does not move easily, and the cold air circulation holes are blocked by the cooling cold storage medium. It does not peel off, and the contact area with the inner peripheral surface of the recess is reduced to improve cold air circulation.
Shipping and keeping products that need to be kept cold, such as raw vegetables, dairy products, various medicines, frozen desserts such as ice cream, confectionery such as cakes, and fresh fish, in returnable containers for transportation, insulated containers for packaging, and other contents. It has been devised to be suitable for use in containers that require.

Next, embodiments of the present invention will be described based on the drawings.
Reference numeral 1 denotes a lid main body which is made of synthetic resin foam and is formed to be able to be fitted onto the container main body 20, and the center part of the upper surface is recessed to a required depth so as to leave a required width around the periphery. A lid plate 3 made of synthetic resin foam similar to that of the lid main body 1 is removably fitted to the upper part of the installation part 2, and the space of the recessed part 2 is filled with a cooling medium 30 such as a cold storage material or a coolant. It is configured as a storage chamber 4. At the bottom of the recessed portion 2, that is, on the upper surface of the bottom wall 5 of the storage chamber 4, a plurality of recesses 6 are provided at predetermined intervals, each having a predetermined length and a curved cross section, into which the cooling and cold storage medium 30 is inserted. A rod-shaped cooling and cold storage medium 30 such as a bagged rod-shaped cold storage material can be inserted into the housing. In the case of the figure, recesses 6 in one direction are provided in parallel at equal intervals, and the cross section as a whole has a substantially wave-like shape.

A groove 9a extending in the longitudinal direction of the recess is formed in the lower part of the inner circumferential surface of the recess 6, and a groove 9a crosses the recess 6 in a direction crossing the groove 9a at a predetermined interval in the longitudinal direction of the recess. 9b is each recessed part 6,6
These grooves 9a and 9b are formed so as to divide the partition wall portion 8 between them.
In the fitted state of 0, the gap retaining portion 7 communicates with the cooling and cold storage medium 30 from the lower bottom upward. Furthermore, holes 10 for cold air circulation are provided at the grooves 9a, 9b and at locations outside the recess 6. The number, size, shape, etc. of the holes 10 are determined in consideration of the type of cooling medium 30 to be used, the strength of the bottom wall 5, etc.

The bottom wall 5 of the storage chamber 4 is preferably provided integrally with the lid body 1, but a bottom wall member formed separately from the peripheral edge of the lid body 1 may be attached to the peripheral edge by fitting or other means. In this case, the bottom wall member can be made of foamed or non-foamed synthetic resin or other various materials. Furthermore, it is also possible to make the height of the substantially wave-shaped section by the recesses 6 on the upper surface of the bottom wall 5, that is, to make the heights of the partition wall portions between the recesses 6, 6 different, or to give heights in the longitudinal direction of the partition wall portions. .

Further, the fitting structure of the cover plate 3 to the recessed part 2 may be in any form as long as it can maintain a space for the storage chamber 4 between it and the bottom wall 5. A stepped portion 12 formed by a notch is provided on the side of the portion 2, that is, on the inner periphery of the side wall portion 11 of the storage chamber 4, and the lid plate 3 is
It is preferable to fit onto this stepped portion 12 so that the peripheral edge portion 3a thereof is supported and supported by the stepped portion 12. The cover plate 3 may be plate-shaped with a flat bottom surface as shown in the figure, or may have a protrusion on the lower part of the periphery or a protrusion that fits inside the step 12. Various implementations are possible. In either case, it is desirable that the lid body 3 is provided with notches or irregularities at required locations for attachment/detachment operations. In the case of the illustrated embodiment, both sides of the upper surface of the lid plate 3 are cut out so that when the lid plate 3 is fitted to the lid body 1, the recess 13 by the notch can be formed on the upper surface of the lid body 1. When stacking containers, a convex portion 21 provided on the lower surface of the bottom of the container body 20 is provided so as to fit into the recess 13 for positioning. The depth of the recess 13 is formed to be greater than the height of the protrusion 21, so that when the containers are stacked, dirt on the protrusion 21 on the bottom surface of the containers does not adhere to the top surface of the lid. In some cases, a convex portion is formed on the upper surface of the lid body 1.

The structure in which the lid body 1 fits into the container body 20 can be implemented in various forms, and in the illustrated example, the lid body 1 is structured to fit into a notch step 22 inside the opening edge of the container body 20. Furthermore, the peripheral flange 14 of the lid body 1 is provided to rest on the upper surface of the opening edge of the container body 20.

The lid body 1 and the lid plate 3 are made of styrene resin foam such as polystyrene resin and copolymer mainly composed of styrene, polyolefin resin foam such as polyethylene resin, polypropylene resin, and copolymer mainly composed of these. In addition to using polyvinyl chloride resin foam or other synthetic resin foam alone, it is also possible to use a synthetic resin foam whose surface is covered with a non-foamed synthetic resin as a skin layer.

As the container body 20, similarly to the lid body 1, etc., a synthetic resin foam alone or a non-foamed synthetic resin covered as a skin layer is preferably used.

The present invention is constructed as described above, and is suitable for use in returnable boxes for shipping, transporting, or refrigerated containers for packaging frozen desserts such as ice cream, confectionery such as cakes, foods and other products that require cold storage such as fresh fish. The cooling medium 30 may be appropriately stored in the storage chamber 4 provided inside the lid main body 1 according to the necessity of use. As this cooling cold storage medium 30,
For example, a rod-shaped cold storage material or a coolant made by enclosing a gel-like or jelly-like cold storage material with a large heat capacity in a synthetic resin bag is preferably used.

After the product that requires cold storage is stored in the container body 20, the lid body 1 is placed in the recessed portion 2 of the lid body 1, that is, in the storage chamber 4, with or before the lid body 1 is fitted onto the container body 20. After storing the cooling medium 30, such as a bagged rod-shaped cold storage material, which has been cooled in advance in a refrigerator or the like, by fitting it into the recess 6 on the bottom wall 5 at a predetermined position, the lid plate 3 is fitted into the recess 2. Storage room 4
The cold air of the cooling medium 30 in the storage chamber 4 is not discharged to the outside, but instead flows into the groove 9a at the bottom of the recess 6, the groove 9b in the direction crossing this, and the area outside the recess. It flows into the lower container body 20 through the holes 10 provided at the locations, and the articles stored in the container body can be directly cooled and kept cold. In addition, when replacing or replenishing the cooling medium 30 in the storage chamber 4, the lid body 1
The above-mentioned replacement and replenishment operations can be performed by simply attaching and detaching only the lid plate 3 without separating the container body 20 from the container body 20.

In addition to the above, the cold storage material can be stored in the container body 20 and a coolant such as dry ice can be stored in the storage chamber 4 to cool the cold storage material itself, and the cooled cold storage material can be taken out. As mentioned above, it can be used by storing it in the storage chamber 4 of another container.

As described above, the present invention makes use of the double structure of the lid body 1 that can be fitted onto the container body 20, and allows the cooling medium to be stored inside the lid itself regardless of the internal structure of the container. There is no need to provide a storage section for the internal cooling medium, and the inside of the container can be effectively used only for storing articles. In addition, the cold air generated by the cooling medium 30 flows into the container through the hole 6 in the bottom wall 5, allowing direct cooling and storage in the same way as storing the cooling medium inside the container. There is no risk of cold air escaping during replenishment work, and combined with the heat insulating properties of the synthetic resin foam material, excellent cooling and cold retention effects can be achieved.

In particular, in the present invention, a plurality of recesses 6 having a curved cross-section and into which a cooling medium is inserted are provided at predetermined intervals on the upper surface of the bottom wall 5 of the storage chamber 4.
Even if the cooling cold storage medium 30 is relatively easy to roll, such as a rod-shaped cold storage material, it can be fitted into the recess 6 and securely held at a predetermined position within the storage chamber 4. It is possible to prevent the container from moving erratically or being biased to one side in the storage chamber 4 due to vibrations during transportation, and to ensure a stable storage state.

Moreover, in the present invention, a groove 9a extending in the longitudinal direction of the recess 6 is formed in the lower part of the inner circumferential surface of the recess 6, and a groove 9b crossing the recess 6 in a direction perpendicular to this is formed. , the circumferential surface of the cooling medium fitted into the recess 6 does not completely contact the inner circumferential surface of the recess 6, but the grooves 9a, 9b
Because of this, there is a gap partially, that is, both the grooves 9
a and 9b serve as the gap retaining portion 7, and the circumferential surface of the cooling and cold storage medium is held in a state where it does not come into contact with the inner peripheral surface of the recess, so that the contact area is small, and the cold air is effectively absorbed from the surroundings of the cooling and cold storage medium. from the groove 9a in the longitudinal direction of the recess to the groove 9b in the cross direction.
It communicates with the whole through the cooling medium to improve the cold air circulation of the cooling medium. Moreover, in the case of the present invention, holes 10 for cold air circulation are provided in the grooves 9a and 9b, which serve as the void retaining portions 7, and in the portions outside the recesses 6. Because of the positioning effect of the recess 6 and the gap retaining effect, it can be kept open at all times, including during transportation, and there is no risk of impairing the cool air circulation, making it uniform and extremely effective. A good cooling effect can be maintained for a long period of time.

Therefore, the present invention has a simple structure and can store a cooling medium such as a rod-shaped cold storage material stably in a fixed position and in a very convenient way for cold air circulation, and can always exhibit a good cold air circulation effect, that is, a cooling cold preservation effect. Therefore, it is extremely suitable as a lid structure for returnable boxes for shipping or transporting frozen desserts such as ice cream, cakes, fresh fish, pickles, and other items that require cold storage, or for cold containers for packaging.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a perspective view of the lid before the cover plate is fitted, Fig. 2 is an enlarged perspective view of a part of the bottom wall of the storage chamber, and Fig. 3 is a cross-section of the same. Figure, 4th
The figure is a cross-sectional view of the container fitted into the container body, and FIG. 5 is a cross-sectional view taken along line A--A in the previous figure. 1... Lid main body, 2... Recessed part, 3... Lid plate, 4
... Storage chamber, 5 ... Bottom wall, 6 ... Recess, 7 ... Gap retaining section, 9a, 9b ... Groove, 10 ... Hole for cold air circulation, 20 ... Container body, 30 ... Cooling and cold storage Medium.

Claims (1)

[Scope of utility model registration request] The center part of the upper surface of the lid body made of synthetic resin foam is recessed so that it can be freely fitted into the container body, and the lid plate made of synthetic resin foam is removably fitted to the upper part of the recessed part. The recessed space is used as a storage chamber for a cooling medium such as a rod-shaped cold storage material, and a plurality of recesses each having a curved cross section and into which the cooling medium is inserted are provided at predetermined intervals on the upper surface of the bottom wall of the storage chamber. A groove extending in the longitudinal direction of the recess is formed in the lower part of the inner circumferential surface of the recess, and a groove that crosses the recess in a direction perpendicular to the recess is formed, and these grooves are used for cold air circulation when the cooling and cold storage medium is inserted. 1. A lid structure for a container, characterized in that the container has a gap retaining portion, and further includes holes for cold air circulation in the groove and outside the recess.