JPH024916Y2 - - Google Patents

Description

[Detailed Description of the Invention] 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 cold storage medium such as a cold storage material or a coolant or a heat insulation medium such as a heat storage material can be stored inside the container, that is, in the recessed space. If the surface is flat, the stored cold/thermal media may move easily during transportation and may become biased to one side, or the circulation holes formed in the bottom wall of the recessed portion may be blocked to improve the cold or heat retention effect. There is a risk of loss.

Therefore, in the present invention, as the above-mentioned lid structure, a large number of convex portions having a flat top surface are arranged at required intervals on the upper surface of the bottom wall of the recessed portion that becomes the storage chamber, and Holes for cold air or hot air circulation are provided at certain locations to allow cooling and cold storage media such as bagged cold storage materials and heat storage materials to be stably supported with a gap between the holes and the bottom wall surface. And the holes for hot air circulation are not blocked and can exhibit good cold and heat retention effects, such as frozen foods, raw meat, ham, sausages, fish, etc.
Returnable boxes or packaging for shipping and transporting raw vegetables, dairy products, various chemicals, frozen desserts such as ice cream, confectionery such as cakes, products that require cold storage such as fresh fish, or products that require heat retention such as pizza and hot cakes. It has been devised to be suitable as a lid for a cold or heat insulating container or other container that needs to be kept cold or warm depending on the contents.

Next, embodiments of the present invention will be described based on the drawings.
Reference numeral 1 is a lid main body made of synthetic resin foam and 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 at the periphery. A lid plate 3 made of synthetic resin foam similar to that of the lid main body 1 is removably fitted onto the upper part of the recessed part 2, and the space created by the recessed part 2 is used for storing cold storage materials, cooling materials, heat storage materials, etc. It is configured as a storage chamber 4 for a cold/heat insulating medium 30. At the bottom of the recessed portion 2, that is, on the upper surface of the bottom wall 5 of the storage chamber 4, there are a number of convex portions 6 which serve as receiving portions for the cold and heat insulating medium 30, as shown in the figure, in a parallel arrangement at equal intervals vertically and horizontally, or in any other arrangement. They are set up in a scattered manner. As shown in the figure, the convex portion 6 has a substantially truncated conical shape or a substantially truncated pyramid shape that widens towards the bottom, with inclined side surfaces that are continuous with the upper surface of the bottom wall and have a flat top surface. It becomes more,
It is particularly preferable that the sloped side surface is smoothly continuous with the top surface of the bottom wall in a rounded curved surface, and the height, size, interval, etc. of the sloped side surface can be arbitrarily determined according to the size, weight, etc. of the cold/heat insulating medium 30 mounted and stored thereon. Can be set. In addition, the bottom wall 5 is provided with a required number of holes 7 for circulating cold air or hot air at lower locations other than the protrusions 6, that is, in the portion between the inclined side surfaces of the adjacent protrusions 6, 6. Therefore, the side surface of the convex portion becomes an inclined surface toward the hole 7. In particular, in the case of the illustrated embodiment, it is arranged at the center of a recess surrounded by four adjacent convex parts 6 vertically and horizontally, so that cold air etc. can circulate well when the cold/heat insulating medium 30 is stored. It's summery. The number, size, shape, etc. of the holes 7 are determined in consideration of the type of the cold/heat insulating medium 30, the strength of the bottom wall 5, etc.

Regarding the bottom wall 5 of the storage chamber 4, depending on its thickness and area, a reinforcing rib 8 may be provided at an appropriate location such as the longitudinal center part as in the illustrated embodiment. In this case, the rib 8 The above-mentioned protrusions 6 and holes 7 are provided in each section divided by . Further, the bottom wall 5 is preferably formed integrally with the lid body 1, but it may also be configured by attaching a bottom wall member formed separately from the peripheral edge of the lid body 1 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.

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 10 formed by a notch is provided on the side of the portion 2, that is, on the inner periphery of the side wall portion 9 of the storage chamber 4, and the lid plate 3 is fitted onto this stepped portion 10 so that its peripheral edge 3a is received by the stepped portion 10. It is preferable to implement it in such a way as to support it. The cover plate 3 can be implemented in various forms other than a plate shape with a protruding edge provided at the lower part of the peripheral edge as shown in the figure. In addition, in the case of the illustrated embodiment, the cover plate 3
Both sides of the top surface are depressed to form a recess 11 on the top surface of the lid body 1 when the lid plate 3 is fitted to the lid body 1, so that when containers are stacked, the container body 1 is depressed. Convex portion 1 provided on the bottom surface of the bottom
2 is provided so that it can be fitted into the recess 11 and positioned. The depth of the recess 11 is formed to be greater than the height of the protrusion 12 to prevent dirt from the protrusion 12 on the bottom of the containers from adhering to the top surface of the lid when the containers are stacked. In some cases, a convex portion is formed on the upper surface of the lid body 1. In either case, it is desirable that the cover plate 3 is provided with notches 13 and irregularities at required locations for attachment/detachment operations.

The structure for fitting the lid body 1 to the container body 20 can be implemented in various forms, and in the illustrated example, the lid body 1 is structured to fit inside the opening edge of the container body 20, and further, the lid body 1 is fitted into the container body 20. A peripheral flange 14 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 coated 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 coated with a skin layer is preferably used.

The present invention is constructed as described above, and is suitable for shipping and transporting frozen desserts such as ice cream, confectionery such as cakes, foods that require cold storage such as fresh fish, foods that require thermal insulation such as hot cakes, and other products. It is used as a box or a cold/heat insulating container for packaging, etc., and the cold/heat insulating medium 30 may be appropriately stored in the storage chamber 4 provided inside the lid body 1 according to the necessity of its use. As this cold/thermal insulating medium 30,
For example, a bagged cold storage material or a heat storage material in which a gel-like or jelly-like material with a cold storage effect having a large heat capacity is sealed in a flat synthetic resin bag having a front and a back body is particularly preferably used. Of course, a coolant such as dry ice or other cold or heat storage materials can also be used.

After storing the product that needs to be kept cold or warm inside the container body 20, the lid body 1 is inserted into the container body 20.
0, or before it is fitted, a cold/heat insulating medium 3 such as a bagged cold storage material pre-cooled in a refrigerator or the like is placed in the recess 2 of the lid body 1, that is, in the storage chamber 4.
0 on the bottom wall 5, the lid plate 3 is fitted into the recessed part 2 to keep the storage chamber 4 in a closed state, and the cold air or The warm air flows through the hole 7 in the bottom wall 5 into the container body 20 below, and the articles stored in the container body can be directly kept cool or warm. Furthermore, when replacing or replenishing the cold/thermal insulating medium 30 in the storage chamber 4, the replacement and replenishment can be done by simply attaching and detaching the lid plate 3 without removing the lid body 1 from the container body 20. operations can be performed.

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 dual structure of the lid body 1 that can be fitted onto the container body 20, and allows the storage of a cold or warm medium inside the lid itself, regardless of the internal structure of the container. There is no need to provide a storage section for the cold/heat insulating medium inside, and the inside of the container can be effectively used only for storing articles.

Moreover, in the present invention, the bottom wall 5 of the storage chamber 4
Since a large number of convex portions 6 are provided at required intervals on the upper surface, the cold/thermal insulating medium 30 such as bagged cold storage material that is mounted and stored on the convex portions 6 is supported by the convex portions 6. A gap is maintained between the bottom wall 5 and the top surface of the bottom wall 5 outside.

In particular, in the case of the present invention, since the plurality of convex portions 6 have flat top surfaces, even if the cold/heat insulating medium 30 placed thereon is a bagged cold storage material or a heat storage material, it is supported by the flat surfaces. Since there is no risk of the bottom wall slipping off easily due to the bottom wall, and the sliding movement can be restricted by local support, the bottom wall can be held stably and reliably in a state with a gap between it and the bottom wall surface.

In addition, in particular, since the side surface of the convex portion 6 is continuous with the top surface of the bottom wall 5 with an inclined surface that expands outward toward the bottom, the cold air or warm air caused by the cold/heat retaining medium 30 can be absorbed by the convex portion. Good convection can occur around the portion 6 without stagnation, and since the circulation hole 7 is located between the inclined side surfaces of the convex portions 6, cold air etc. can flow through the hole 7 along the inclined surface of the convex portion 6. The cold air flows easily toward the inside of the container body from the hole 7 and the cool air can be effectively circulated.

In other words, if the side surface of the convex part is perpendicular to the top surface of the bottom wall, cold air, etc. tends to accumulate near the corner between the side surface and the top surface of the bottom wall, and the cold air tends to be trapped especially from around the convex part. However, in the case of the present invention described above, the slope of the side surface of the convex portion allows the cold air around the convex portion to flow smoothly toward the hole without stagnation, and this also has the above-mentioned void retaining effect. Combined with this, the circulation effect of cold air etc. from the holes 7 into the inside of the container is further improved, and therefore, an extremely excellent cold/warm retention effect can be exhibited.

Moreover, since the lid body 1 and the lid plate 3 that closes off the storage chamber 4 are mainly made of synthetic resin foam, they have excellent insulation properties and do not allow cold or warm air from the cold/heat insulating medium inside the storage chamber to escape. , it is possible to maintain good cold and heat retention effects. Furthermore, since the cold and heat insulating medium can be stored, replaced, and refilled while the lid body 1 is still fitted onto the container body 20, there is no risk of cold or warm air inside the container escaping for these operations. It is possible to maintain a cold state even during replacement or replenishment work, and to provide good protection for items that require cold or warm insulation.

Therefore, the present invention has a simple structure and can store cold and heat insulating media such as bagged cold storage materials and heat storage materials in an extremely convenient manner in terms of gas flow, and can exhibit extremely excellent cold and heat retention effects. It is extremely suitable as a lid structure for returnable containers for shipping and transporting frozen desserts, cakes, fresh fish, pickled vegetables, and other products that require cold storage or hot storage, or for packaging cold/warm containers.

[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 fitting the cover plate, Fig. 2 is an enlarged perspective view of a part of the bottom wall of the storage chamber, and Fig. 3 is a perspective view of the container body. A cross-sectional view of the fitted state, and FIG. 4 is a cross-sectional view taken along the line taken from the front figure. 1... Lid main body, 2... Recessed part, 3... Lid plate, 4
... Storage chamber, 5 ... Bottom wall, 6 ... Convex portion, 7 ... Hole for cold or hot air circulation, 20 ... Container body, 3
0...Cold/heat retaining medium.

Claims (1)

[Scope of utility model registration request] The center part of the upper surface of the lid body, which is mainly made of synthetic resin foam, is recessed so that it can be freely fitted into the container body, and the lid plate, which is mainly made of synthetic resin foam, is removably fitted into the upper part of the recessed part. The recessed space is used as a storage chamber for a cold/heat insulating medium, and the upper surface of the bottom wall of the storage chamber has a shape that widens toward the bottom and has sloped side surfaces that are continuous with the upper surface of the bottom wall and have a flat top. 1. A lid structure for a container, characterized in that a large number of convex portions each having a surface are arranged at a predetermined interval, and holes for circulating cold or hot air are provided in a lower part of the bottom wall between the convex portions.