JPH0764366B2 - Foam synthetic resin container - Google Patents

Description

TECHNICAL FIELD The present invention relates to a foamed synthetic resin container, and more particularly to a foamed synthetic resin container provided with a window for injecting cold air or warm air that can be opened and closed easily and reliably. Is.

“Prior Art and Problems” Conventionally, foamed synthetic resins represented by expanded polystyrene have been widely used for various packaging containers, transportation containers, etc. because they have excellent cushioning properties and heat insulating properties.

As a typical example, seafood, vegetables, fruits, and other regional special products are delivered to consumers while maintaining their freshness, and ingredients such as dinner are available to consumers. There are packaging and shipping containers for courier that are ready to cook, and that are processed and seasoned and the consumer only sells them in a microwave oven for the freshness.

In the case of seafood, cooking materials, etc., a method is adopted in which after being stored in a container in a frozen or cooled state, it is filled with dry ice, a cold storage agent or ice necessary for delivery to a destination. If, for example, the time required for delivery is longer than the scheduled time, dry ice will run short, resulting in deterioration of the quality of the stored items and, in some cases, spoilage, resulting in a total loss of commercialability. . On the other hand, if an excessive amount of dry ice or the like is packed to prevent this, the storage efficiency will be reduced and the cost will be increased.

In order to make up for these drawbacks, seafood, vegetables, fruits, cooking materials, etc. are often used in cold storage or frozen vehicles depending on the destination, application, distance, etc. To be However, even in this case, cooling is performed from the outer circumference of the closed cool container, and since it is a cold container originally made of a heat insulating material, the cooling effect is very poor, and only the outer circumference of the container is cooled depending on the transportation distance and time. Is
It often happens that the contents are not cooled, and the original Nerai of the refrigerating car is often not utilized, so if the structure is such that it can be easily cooled through the container wall, this time after cooling the container will be in the atmosphere of the outside air. When placed, it causes a defect such as a rapid temperature rise of the contents. Therefore, it is considered that the cooling effect is unavoidable, and the cold storage container is cooled.

Thus, complicated transportation routes, for example, collecting frozen foods of many individuals and maintaining the frozen state safely and surely and delivering them to many destinations are cost, facility, and transportation system-related. Impossible.

On the other hand, vegetables and the like are generally stored in a container, precooled by, for example, differential pressure precooling, and then delivered to a destination. Even in this case, if the delivery time is longer than the scheduled delivery time, the same problem as described above occurs.

“Means for Solving Problems” As a result of earnest research in view of such actual circumstances, the inventors of the present invention store the contents, load a container storing the contents on a transportation vehicle, or sort at a terminal. Except, etc., for example, while waiting for cargo to be loaded at a collection store or while being transported by transport vehicle, the windows provided on the container are automatically opened in the built-in refrigerator or freezer to introduce cold air into the container. The above problems can be solved all at once by adopting a method of cooling the items and automatically closing the window during the collection or sorting of the above other items and enclosing cold air in the container. It was discovered that fresh food can be delivered in a fresh state, and it has been possible to provide a foamed synthetic resin container that is inexpensive and has a simple structure, does not malfunction when opening and closing windows, and can be safely operated unattended. .

That is, the present invention is a heat-insulated container comprising a lid body made of foam synthetic resin and a container body, wherein a window portion is provided on at least one surface of the lid body or the container body, and the window portion has an opening portion and the opening. And a door that covers the portion, the door being a shape memory alloy,
It is intended to provide a foamed synthetic resin container characterized by having a structure in which a heat-sensitive deforming means composed of a bimetal or an expansion sensor is moved to automatically form or close a vent hole.

The lid, the container body and the window of the present invention are made of foam synthetic resin, and as the foam synthetic resin, polystyrene type, polyolefin type such as polyethylene and polypropylene, polyurethane type resin and the like are preferable. Further, as the heat-sensitive deformation means used in the present invention, a shape memory alloy, a bimetal, an expansion sensor and the like are suitable, and these are used alone or in combination, and further, they are used in combination with elastic materials such as rubber and spring. Is also good. The expansion sensor may be, for example, a balloon filled with a gas whose volume expands or contracts depending on temperature. In the present invention, the window portion may be detachably attached, or the window frame may use the side surface of the container itself. In addition, the window is attached to the opposite side wall surface.
Providing one piece is suitable for differential pressure precooling.

The present invention will be described with reference to the drawings showing an embodiment. FIG. 1 (A) is a front view of the container of the present invention, and FIG.
-A sectional view, FIG. 1 (C) is a sectional view in a state in which the vent hole is closed. In these figures, the container of the present invention comprises a lid (1) and a container body (2). Openings (4) are formed in the side wall surfaces (3) (3 ') of the container body (2) which face each other.
(4 ') is provided, and concave door accommodating portions (5) and (5') are provided on both sides of the openings (4) and (4 '), and the door accommodating portions (5) and (5') are provided. The doors (6) and (6 ') are slidably fitted. The doors (6) (6 ') are supported by a two-way type shape memory alloy (7) (7') that contracts below a predetermined temperature and expands above that temperature. The doors (6) and (6 ') are naturally larger than the openings (4) and (4'), and when the shape memory alloys (7) and (7 ') are expanded, the doors (6) and (6') are The openings (4) and (4 ') are closed so that the openings are exposed when the shape memory alloy is contracted.

Thus, in the above-mentioned container, when the temperature becomes lower than a predetermined temperature (for example, 5 ° C.), the shape memory alloys (7) and (7 ') contract as shown in FIGS. 1 (A) and 1 (B), and the door (6 ) (6 ')
When the temperature is higher than the temperature, the shape memory alloys (7) and (7 ') are released from the shape memory alloys (7) and (7') by pushing down to expose the openings (4) and (4 ') to form the ventilation holes and introduce the ambient cool air into the container. As it is extended, the doors (6) and (6 ') are pushed up as shown in FIG. 1 (C) to cover the openings (4) and (4') and close the ventilation holes, thereby sealing the cool air in the container.

2 (A) and 2 (B) show another embodiment of the container of the present invention, in which the door (6) is supported by a bellows (8) enclosing a gas with large thermal expansion such as "Freon 14". There is. Suitable materials for the bellows (8) include polyethylene and neoprene. When the temperature is lower than the predetermined temperature, the bellows (8) contracts and the door (6) is pushed down as the volume of the enclosed gas contracts as shown in FIG. 2 (A), and the opening (4) is exposed. When pores are formed and the temperature rises, the enclosed gas expands and the bellows (8) expands as shown in FIG. 2 (B), pushing up the door (6) and covering the opening (4). Close the stomata.

FIGS. 3 (A) and (B) show still another embodiment of the container of the present invention, in which a door (6) is attached to the outside of the opening (4) by a spiral bimetal (9), When the temperature is lower than a predetermined temperature, the door (6) is lifted to form a ventilation hole as shown in FIG. 3 (B), and when the temperature is higher than the predetermined temperature, the door (6) is lowered to open the ventilation hole as shown in FIG. 3 (A). Close.

4 (A) and (B) show another embodiment of the container of the present invention, in which a side wall (3) is provided with a circular door accommodating portion (5) having openings (4a) and (4b), and a door ( 6) is fixed to a rotatable support shaft (10) by a spiral bimetal (9) attached to the center of the door accommodating portion (5). Thus, below the predetermined temperature, the bimetal (9) contracts, the door (6) is in a substantially horizontal position as shown in FIG. 4 (A), the openings (4a), (4b) are exposed, and the vent holes are formed. Bimetal (9) when it is in the formed state and becomes higher than the above temperature
Expands to rotate the support shaft (10), the door (6) moves to a substantially vertical position as shown by the broken line in FIG. 4 (A), and the portion (6a) of the door (6) The opening (4a) and the portion (6b) cover the opening (4b) to close the vent hole.

FIGS. 5 (A) and 5 (B) show still another embodiment of the container of the present invention, in which the door (6) is slidably fitted in the upper and lower door accommodating portions (5), (5 '). An opening (4) is provided which can be closed by a door (6). The ring-shaped rubber (11) is fitted into the groove (13) on the three sides of the door (6), and the fixing portion (1
The fixed part (12) and the door (6) are hooked to the second part (2) and are connected by a one-way spring-shaped shape memory alloy (7). A convex portion (14) for attaching to the side wall of the container is provided around the outer periphery, and the convex portion (14) is attached by being fitted into a concave portion (not shown) provided in the side wall. Thus, when the container as described above has a predetermined temperature or lower, the shape memory alloy (7) shrinks as shown in FIG. 5 (A), and the contracting force of the ring-shaped rubber (11) causes the door (6) to move toward the fixed portion (12) side. And the opening (4) is exposed to form a ventilation hole, and when the temperature exceeds a predetermined temperature, the shape memory alloy (7) is drawn.
Expands against the contracting force of the rubber (11) to close the opening (4) and close the vent hole.

In the present invention, the positions, shapes and numbers of the openings, the sliding direction and the opening / closing direction of the door, the shapes of the heat-sensitive deformation means and the stretchable material, and the like can be varied in many ways, and these do not depart from the spirit of the present invention. Only included in the present invention.

"Operation / Effect" The container of the present invention is suitable for transportation of all perishables,
For example, door-to-door delivery in a fresh state of cooked food simply by heating in a microwave oven is possible by the following steps. To describe a typical work process example in this case, cooking → freezing → packaging (closed; window open / closed state, same below) → collection shop (open) → cargo (closed) → refrigeration transport vehicle (open) →
Terminal sorting (closed)-> refrigerated transportation vehicle (open)-> terminal sorting (closed)-> frozen transportation vehicle (open)-> home delivery, which requires repeated opening and closing operations, but using the container of the present invention automatically and It can be done reliably. That is, in the process of a collection shop and a refrigerated transport vehicle, it is necessary to place the cold air in the freezer with the window open, but when the container is housed in the freezer, it automatically senses the temperature and the Invention If the heat-sensitive deformable means is adjusted and designed in advance so that the door of the window portion of the container can be moved to form a ventilation hole and the door is returned to the original position to close the ventilation hole when it is taken out of the refrigerator, the container is closed. The window can be automatically opened only by storing it inside, and can be closed at the same time when it is taken out from the freezer.

Thus, according to the present invention, the extremely cheap and simple structure allows unmanned window opening and closing work of the container, and since there is no malfunction, higher quality assurance is possible, and cooking that is proud of in remote areas It is possible to exchange each other and deliver homemade dishes to single-employees' residences and boarding destinations, enabling an epoch-making delivery system that transcends the conventional delivery frame. Further, it goes without saying that the present invention can be widely applied not only to the cool box for home delivery, but also to the cool box for vegetables, the fish box, the cool box for direct delivery from the production area, the food distribution box, the medicine transportation box, and the like.

[Brief description of drawings]

1 (A) to (C) show an embodiment of the container of the present invention,
FIG. 1 (A) is a front view showing a state in which ventilation holes are formed,
1 (B) is a sectional view taken along the line AA in FIG. 1 (A), FIG. 1 (C) is a sectional view showing a state in which a vent hole is closed, and FIGS. 2 (A) and 2 (B) are FIG. 2 (A) shows another embodiment, and FIG. 2 (A) is a partial sectional view showing a state in which a vent hole is formed, FIG. 2 (B) is a partial sectional view showing a state in which the vent hole is closed, and FIG. (A) and (B) show another embodiment,
FIG. 3 (A) is a partial cross-sectional view showing a state in which the ventilation holes are closed, FIG. 3 (B) is a partial cross-sectional view showing a state in which the ventilation holes are formed, and FIGS. 4 (A) and 4 (B). Shows another embodiment of the present invention, FIG. 4 (A) is a schematic view of an essential part, FIG. 4 (B) is an enlarged sectional view taken along line BB in FIG. 4 (A), and FIG. 5 (A). ,
FIG. 5 (B) shows still another embodiment of the present invention, FIG. 5 (A) is a schematic view showing a state in which ventilation holes are formed, and FIG. 5 (B) is C- in FIG. 5 (A). It is C sectional drawing. 1 ... Lid body, 2 ... Container body 3, 3 '... Side wall surface 4, 4' ... Opening part 5, 5 '... Door storage part, 6, 6' ... Door 7, 7 '... Shape memory alloy 8 Bellows 9 Spiral bimetal 10 Support shaft 11 Ring rubber 12 Fixed part 13 Groove 14 Convex part

Claims (2)

[Claims] 1. A heat insulating container comprising a lid body made of foam synthetic resin and a container body, wherein a window portion is provided on at least one surface of the lid body or the container body, and the window portion has an opening portion and the opening. A foam synthetic resin characterized by comprising a door for covering a portion, the door being moved by a heat-sensitive deformation means composed of a shape memory alloy, a bimetal, or an expansion sensor to automatically form or close a vent hole. container. 2. The container according to claim 1, wherein two window portions are provided on opposing side wall surfaces.