JP7440448B2 - Transport cooler - Google Patents

Description

The present invention is provided with a transport box body that forms a storage space for the cold pack and the low-temperature transported object therein, and at least one side of the transport box main body is provided with the transport box main body to allow the cold pack and the low-temperature transport material to be inserted into and taken out of the storage space. The present invention relates to a cold storage box for transportation, which is provided with an opening that can be opened and closed, a door that can be opened and closed, and a plurality of casters are attached to the bottom of the transportation box body.
In other words, in general, when transporting simple items, a bag made of a flexible heat insulating sheet is placed over the item, and the item is placed on a cart called a cage truck, which is made up of a pipe frame. In this case, due to the low cold storage performance, it is difficult to transport in room-temperature vehicles, especially in the summer when temperatures are high, so the above-mentioned cold storage for transportation is often carried out. storage is being considered.

Traditionally, fresh foods and other products have been distributed at a predetermined low temperature from the point of production to the consumer's hands, but processes such as transportation and storage have been linked to ensure that low temperature control is not interrupted. This is why it is called a cold chain.
In the field of cold chain logistics, refrigerated trucks are used to transport fresh foods loaded in transport coolers at low temperatures, but in the unlikely event that the refrigeration equipment breaks down, refrigerated trucks are also used to store cold packs. It is accommodated.
Generally, when transporting in a room-temperature vehicle in the summer, the temperature in the room-temperature vehicle's cargo compartment rises to 50°C.
When a low-temperature transport object is housed in the transport cooler together with an ice pack and transported by a room-temperature vehicle, the temperature of the storage space for the low-temperature transport object may also rise due to heat bridges.
At this time, if the predetermined temperature cannot be maintained, the transported goods must be disposed of.
Under these circumstances, with conventional transport refrigerated storage, it is difficult to transport fish and shellfish and livestock products that must be kept cold at 0°C to 5°C in combination with general cargo in room-temperature vehicles. Met.
In other words, in conventional transport coolers, the cause of heat bridges is that the inner and outer wall members of the transport box body are each made of metal plates or metal sheets, and the insulation between the inner and outer wall members is When filled with materials, the inner and outer wall members are connected to each other through openings, which causes a heat bridge in which outside air temperature transfers to the inside of the housing space. The present inventors have newly discovered this (see, for example, Patent Document 1).

JP2009-168331A

The above-mentioned conventional cold storage for transportation has a problem in that low-temperature transportation items, such as livestock products, must be transported in refrigerated vehicles without being transported together with general cargo items.

Therefore, an object of the present invention is to solve the above-mentioned problems and improve the heat insulation performance of a cold storage for transportation.

A first characteristic configuration of the present invention based on the new findings is to provide a transport box body that internally forms a storage space for ice packs and low-temperature transported objects, and to provide a container on at least one side of the transport box body with respect to the storage space. an opening through which the ice pack and the low-temperature transport material can be put in and taken out; a door that can be freely opened and closed is provided in the opening; a plurality of casters are attached to the bottom of the transport box body; The inner wall member and the outer wall member are each made of a metal plate, and the inner wall member and the outer wall member are integrated by filling a foamed resin between them, and the entire periphery of the opening of the transport box body is formed. providing a first non-continuous portion in which the inner wall member and the outer wall member are in a non-contiguous state with each other, and in the door, an inner surface member and an outer surface member for the accommodation space are each formed of a metal plate; A foamed resin is filled between the inner surface member and the outer surface member so that they are integrated, and a second non-continuous portion is provided in a non-continuous state over the entire circumference of the inner surface member and the outer surface member, A heat-insulating packing material is interposed between the abutting portion of the transport box body and the door over the entire circumference of the opening, so that the accommodation space can be freely sealed, and the first non-continuous portion and the a second non-continuous portion is formed at a contact portion between the transport box main body and the door, the door is attached to the transport box main body via a hinge so as to be openable and closable, and the door and the transport box The tip portion of the bolt of the attachment fitting of the hinge to each main body is covered with a foamed resin molded body, and with a heat insulating sheet adhered to the foamed resin molded body, it is buried in the filled foamed resin, and the said heat insulating sheet is The nonwoven fabric sheet is made of a nonwoven fabric sheet containing airgel, and the nonwoven fabric sheet is housed in an airtight bag and sealed under reduced pressure to form a vacuum pack.

According to the first characteristic configuration of the present invention, in the transport box main body, the inner wall member and the outer wall member are each formed of a metal plate, and the inner wall member and the outer wall member are filled with foamed resin between them. In the door, an inner surface member and an outer surface member for the accommodation space are each formed of a metal plate, and a foamed resin is filled between the inner surface member and the outer surface member to integrate the opening. The storage space is configured to be airtight by interposing a heat insulating packing material between the abutting portion of the transport box body and the door over the entire circumference of the storage space, so that the inside of the storage space is free from outside air. A first non-continuous portion is provided in which the inner wall member and the outer wall member are in a non-continuous state, and the inner wall member and the outer wall member are discontinuous with each other over the entire circumference of the inner wall member and the outer wall member. By providing the second non-continuous portion in the state, the heat transfer path of the inner wall member and the inner surface member that are in direct contact with the housing space is cut at the first non-continuous portion and the second non-continuous portion, Heat bridges from the outer wall member and the outer surface member are suppressed, and the cold insulation effect of the cold pack on the low-temperature transported items can be easily maintained, making it possible to transport the items in room-temperature vehicles.
Therefore, it is now possible to use room-temperature vehicles for mixed transportation with general cargo in various temperature ranges, resulting in energy savings and improving economic efficiency by reducing transportation commission fees and driver labor costs. Ta.

By forming the first non-continuous portion and the second non-continuous portion at the abutting portion between the transport box body and the door, the inner wall member and the inner surface member that directly contact the storage space can be formed as an outer wall member. Also, heat bridges from the outer surface member are completely suppressed, making it possible to further improve the cold insulation effect within the housing space.

The heat insulating sheet can prevent heat from entering through the mounting bolt portion of the hinge that attaches the door to the transport box body so that it can be opened and closed, and the cold insulation effect within the storage space can be maintained.

By forming the heat insulating sheet from a nonwoven fabric sheet containing airgel, heat input can be further prevented.

A second feature of the present invention is that the foamed resin is a polyurethane foam, and the packing material is a foamed rubber packing.

According to the second characteristic configuration of the present invention, by filling the polyurethane foam, it is possible to easily improve the heat insulation performance between the inner wall member and the outer wall member, and between the inner face member and the outer face member, and furthermore, transport at the opening. The airtightness between the box body and the door can be improved by the foamed rubber packing, and the cooling effect in the storage space can be improved.

FIG. 2 is an overall perspective view of a cold storage for transportation. FIG. 3 is a side view of the cold storage for transportation. FIG. 2 is a cross-sectional view of a cold storage for transportation. Main part cross-sectional view: (a) is a cross-sectional view with the door closed, (b) is a cross-sectional view with the door slightly open, and (c) is a cross-sectional view with the door fully open. be. 2 is a cross-sectional view illustrating the manufacturing process of the transport box body, where (a) is a cross-sectional view of a state in which a back plate outer wall member and a back plate inner wall member are held in a first mold for a back plate and a second mold for the back plate; FIG. , (b) is a cross-sectional view of the foamed resin filled state, and (c) is a cross-sectional view of the back plate taken out. (a) is a cross-sectional view showing a door manufacturing process in which a first inner surface member and a first outer surface member are placed in a first mold for a door and a second mold for a door; b) is a cross-sectional view of the state filled with foamed resin, (c) is a cross-sectional view of the removed door, (d) is a cross-sectional view showing the state with packing material attached, and (e) is the first mold for the door. (f) is a cross-sectional view of the state in which the second inner surface member and the second outer surface member are placed in the second door mold, (f) is a cross-sectional view of the state filled with foamed resin, and (g) is the door taken out. (h) is a cross-sectional view showing the state in which the packing material is attached. FIG. 3 is a front view of an opening showing the accommodation state in the accommodation space. It is a graph of temperature changes in the first stage A, the fourth stage B, and the ninth stage C in the accommodation space of a comparative example. These are graphs of temperature changes in the first stage A, the fourth stage B, and the ninth stage C in the storage space of the transport cold storage of the present invention, and the changes are approximately the same.

Embodiments of the present invention will be described below based on the drawings.
As shown in FIGS. 1 to 4, a transport box main body 1 is provided, which forms a storage space S for storing cold packs and low-temperature transport items such as livestock products and seafood inside, and on at least one side of the transport box main body 1, An opening 2 is provided in the storage space S through which refrigerants and low-temperature transport items can be put in and taken out, and a door 3 that can be opened and closed is provided in the opening 2. The bottom of the transport box body 1 is equipped with a flame-retardant rubber ring or the like. A plurality of casters 4 such as synthetic resin wheels are attached to constitute a movable cold storage 5 for transportation.

As shown in FIG. 3, the transport box main body 1 has an inner wall member 6 and an outer wall member 7 formed of metal plates such as galvanium steel plate, stainless steel, aluminum, and aluminum alloy, and the inner wall member 6 and outer wall member 7, and a foamed resin 8 such as hard polyurethane foam or styrofoam is filled between them and integrated, and the inner wall member 6 and the outer wall member 7 are formed over the entire circumference of the opening 2 of the transport box body 1. A first non-contiguous portion 9 is provided in which the first non-contiguous portions 9 are in a non-contiguous state.
In other words, a large box-shaped outer wall member 7 with an opening 2 formed on one end surface, and a small box-shaped inner wall member 6 also formed with an opening 2 on one end surface, with the opening 2 formed in the same direction. The foamed resin 8 is exposed around the entire circumference of the opening 2 by inserting it in the facing state, injecting unfoamed resin into the gap between the outer wall member 7 and the inner wall member 6, and foaming and hardening them to integrate them. A first non-continuous portion 9 is formed.
In the door 3 as well, the inner surface member 10 and the outer surface member 11 for the storage space S are respectively formed of metal plates such as galvanium steel plate or stainless steel, and similarly to the transport box body 1, the inner surface member 10 and the outer surface A foamed resin 8 such as hard polyurethane foam or foamed polystyrene is filled between the inner member 10 and the outer member 11 to form a non-continuous state in which the foamed resin 8 is exposed over the entire circumference of the inner member 10 and the outer member 11. A second non-continuous portion 12 is provided.

A first non-continuous portion 9 and a second non-continuous portion 12 are formed at the abutting portion between the transport box body 1 and the door 3, so that the transport box main body 1 and the door 3 are connected over the entire circumference of the opening 2. A heat insulating packing material 13 such as foam rubber or soft urethane is adhesively fixed to each of the first non-continuous part 9 and the second non-continuous part 12 between the abutting parts with adhesive or adhesive. The storage space S is configured to be freely airtight by intervening so as to

The storage space S is provided with a plurality of shelves, etc., and is configured such that the ice pack 36 can be placed in the upper part, and the low-temperature transport items can be placed in the lower part.
The plurality of shelves are detachably provided on the inner wall member 6 so that the interval between the upper and lower shelves can be changed.

As shown in FIGS. 1 to 4, the door 3 is formed into a half-folding type that is divided into left and right halves, and has a hinge 14 at the folding joint between the first door 3A and the second door 3B. are interposed therebetween, and the doors 3 are attached to the transport box body 1 via hinges 14 so as to be openable and closable.
The tip of the bolt of the fitting 15 for attaching the hinge 14 to the door 3 and the transport box body 1 is covered with a foamed resin molded body 19, and the foamed resin molded body 19 is filled with a heat insulating sheet 16 adhered to the foamed resin molded body 19. It is embedded in resin 8.
The heat insulating sheet 16 is formed of a non-woven fabric sheet containing airgel, and for example, two layers of non-woven fabric sheets with a thickness of 8 mm are housed in an airtight bag and kept in a reduced pressure state to further improve the heat insulating performance. It is formed into a vacuum pack sealed with.

As shown in FIG. 4, the hinge 14 that attaches the door 3 so that it can be opened and closed has a rotating shaft 17 located outside the door 3, and has a structure that allows it to open and close 270 degrees, saving space when opening and closing. It is configured so that it is possible.

When the door 3 is closed, as shown in FIG. 2, the door 3 and the transport box body 1 are configured to be locked and unlocked by engaging buckles 18 separately attached to the side surface near the opening 2 of the transport box body 1. There is.

[Manufacturing process]
The manufacturing process is shown in FIGS. 5 and 6.
(1) First step: Put the back plate outer wall member 7A into the first back plate mold 30, and place the back plate inner wall member smaller than the back plate outer wall member 7A on the inner surface of the second back plate mold 31. 6A, the space created by combining the first back plate mold 30 and the second back plate mold 31 is filled with unfoamed foamed resin 8 and foamed and hardened (FIG. 5). From a) to (b)), the mold is removed and the back plate 32 is taken out.
(2) Second step The periphery of the back plate 32 is cut diagonally from the periphery of the back plate inner wall member 6A to the periphery of the back plate outer wall member 7A (FIG. 5(c)).
(3) Third step After fitting the circumferential plate outer wall member 7B with the back plate side edge bent inside the main body mold 33, the back plate 32 formed in the second step is inserted into the circumferential plate outer wall member 7B. The box-shaped peripheral side plate inner wall member 6B is placed on the edge of the back plate 32 (FIG. 5(d)).
(4) Fourth step After filling unfoamed foamed resin 8 between the circumferential side plate outer wall member 7B and the circumferential side plate inner wall member 6B formed in the third step and foaming and hardening, the mold is demolded and transported. Take out the box body 1 (FIG. 5(e)).
(5) Fifth step In order to form the first door 3A and the second door 3B, the first outer surface member 11A is separately placed inside the first door mold 34 (Fig. 6(a) )), the first inner surface member 10A is held in the second door mold 35, and the unfoamed foamed resin 8 is foamed and hardened between the first door mold 34 and the second door mold 35. to form the first door 3A (FIG. 6(b)→(c)), and also arrange the second outer surface member 11B inside the first door mold 34 (FIG. 6(e)). The second inner surface member 10B is held in the second mold 35 for the door, and the unfoamed foamed resin 8 is foamed and hardened between the first mold 34 for the door and the second mold 35 for the door to form the second door. 3B is formed (FIG. 6(f)→(g)).
(6) Sixth step The first door 3A and the second door 3B are connected with the hinge 14 so as to be bendable, and the door 3 formed by them and the transport box body 1 are connected with the hinge 14 so as to be openable and closable. , a heat insulating packing material 13 is interposed between the abutting portion of the transport box body 1 and the door 3, so that the storage space S can be freely sealed (Fig. 5(f), Fig. 6(d), (h) )).

Next, we conducted an experiment to evaluate the cold storage performance compared to a conventional product (comparative example).
[Experiment example 1]
In this transport cold storage 5, the cold pack 36 is arranged at the top of the inside of the transport cold storage 5 shown in FIG. We measured the temperature change over time at the loading area of the low-temperature transported items.
As shown in the graph of FIG. 9, it is clear that there is almost no variation in temperature from the first stage to the ninth stage, and the temperature can be maintained at 5° C. or lower even after 18 hours have passed.

[Comparative example]
In the transport cold storage shown in the conventional example described above, the cold pack 36 is arranged at the top of the interior of the transport cold storage 5 shown in FIG. Temperature changes with elapsed time in the placement area of the low-temperature transported items from B to A) were measured.
As shown in the graph of Figure 8, there is a large variation in temperature from the 1st stage to the 9th stage; in the 1st stage (Fig. 8A), the temperature exceeds 5°C after about 10 hours, and in the 9th stage, (FIG. 8C), which rose to more than 5°C after 17 hours.

[Another embodiment]
Other embodiments will be described below.
In addition, in the following other embodiments, the same reference numerals are attached to the same members as in the above embodiment.
<1> The inner wall member 6 and outer wall member 7 of the transport box body 1 may be made of plastic materials, but in the case of low-temperature transport items such as livestock products and seafood, they are generally heavy, approximately 40 kg or more. For this reason, it is best to use a galvanium steel plate or other metal plates such as stainless steel, aluminum, or aluminum alloy because of their high strength. Among these, galvanium steel plates and stainless steel are appropriate as they have strength against shocks and loads caused by vibrations during transportation of low-temperature objects, and they also have good anticorrosion properties because they can be washed with water. Further, for the door 3 as well, a metal plate such as galvanium steel plate, stainless steel, aluminum, or aluminum alloy is suitable for the purpose of impact resistance during transportation, similarly to the transport box body 1.
<2> The foamed resin 8 filled between the inner wall member 6 and the outer wall member 7 and between the inner surface member 10 and the outer surface member 11 may be made of a material other than the above, and the filling thickness may be adjusted according to the desired thickness. The design may be changed depending on the degree of heat insulation, or a well-known vacuum heat insulating material may be embedded within the thickness of the foamed resin 8.
<3> In FIG. 1, FIG. 3, FIG. 5(f), and FIG. 6, the door 3 is formed into a center-folding one-side folding type that is divided into left and right halves, and is divided into two parts, a first door 3A and a second door 3B. Although a hinge 14 is interposed at the folding connection portion between the door and the door, the door may be formed of only one door that is not divided into two parts. In addition, in addition to connecting the first door 3A and the second door 3B with the hinge 14 with the divided door 3 in a foldable manner, the door 3 is attached to the transport box body 1 in a so-called double-sided manner that can open both left and right with respect to the opening 2. It may be.
Incidentally, as mentioned above, although the reference numerals are written for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by the markings. Moreover, it goes without saying that the invention can be implemented in various ways without departing from the gist of the invention.

1 Transport box body 2 Opening 3 Door 6 Inner wall member 7 Outer wall member 8 Foamed resin 9 First non-continuous portion 10 Inner surface member 11 External member 12 Second non-continuous portion 13 Packing material S Accommodation space

Claims (2)

A transport box body is provided inside which forms a storage space for ice packs and low-temperature transported items.
At least one side of the transport box body is provided with an opening through which the cold pack and the low-temperature transport material can be taken in and out of the accommodation space, and
The opening is equipped with a door that can be opened and closed freely.
Attaching a plurality of casters to the bottom of the transport box body,
In the transport box main body, the inner wall member and the outer wall member are each formed of a metal plate, and
The inner wall member and the outer wall member are integrated by filling a foamed resin between them,
providing a first non-continuous portion in which the inner wall member and the outer wall member are in a non-contiguous state with each other over the entire circumference of the opening of the transport box main body;
In the door, an inner surface member and an outer surface member for the accommodation space are each formed of a metal plate, and
A foamed resin is filled between the inner surface member and the outer surface member, and the inner surface member and the outer surface member are integrated.
providing a second non-continuous portion that is non-continuous with each other over the entire circumference of the inner surface member and the outer surface member;
A heat insulating packing material is interposed between the abutting portion of the transport box body and the door over the entire circumference of the opening, so that the accommodation space can be freely sealed;
The first non-continuous portion and the second non-continuous portion are formed at a contact portion between the transport box body and the door,
The door is attached to the transport box body via a hinge so that it can be opened and closed,
Covering the bolt tip portions of the hinge attachment fittings for the door and the transportation box body with a foamed resin molding, and embedding the foamed resin in the filled foamed resin with a heat insulating sheet adhered to the foamed resin molded product. ,
The heat insulating sheet is formed of a nonwoven fabric sheet containing airgel, and the nonwoven fabric sheet is housed in an airtight bag and sealed in a reduced pressure state to form a vacuum pack. 2. The cool storage box for transportation according to claim 1, wherein the foamed resin is polyurethane foam, and the packing material is foamed rubber packing.

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