JP2708997B2 - Cold storage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-temperature refrigerator such as a prefabricated refrigerator.

[0002]

2. Description of the Related Art For example, Japanese Unexamined Patent Publication No. 3-105186 discloses a low-temperature storage in which a storage room is formed inside a heat insulating box and a cooling device is provided to cool the storage room. On the front wall of the heat insulating box of this low-temperature storage box, an opening for taking in and out of storage items is formed, and this opening is opened and closed and an insulating door for closing the storage room is provided.

[0003]

In the above-mentioned conventional technology, when the low-temperature storage is, for example, a large prefabricated refrigerated warehouse, the temperature in the storage is often lowered to -25 ° C. or lower. For this reason, it is not easy to carry in or carry out the stored goods, and there is a demand in the market for a warehouse or the like that can automatically carry in or carry out the stored goods due to lack of people in recent years.

FIG. 7 shows a prefabricated refrigerated warehouse, in which a heat insulating box 2 is constituted by combining a plurality of heat insulating panels having a convex portion or a concave portion at a connection portion with an adjacent panel, and the heat insulating box 2 is a ceiling panel. It is composed of side walls such as a top wall 2A, a bottom wall 2B, and a front wall 2C. Then, a storage room 3 closed by the heat insulating box 2 is defined, and a cooling device 3A having an evaporator and a blower forming a refrigeration cycle is attached to the lower surface of the top wall 2A. Instead of forming a large opening in the side wall and carrying in and carrying out the work with a forklift or the like, a small opening 4 is formed and a heat insulating door 5 that closes the opening 4 so that it can be opened and closed is provided. Further, a rail R extending from the outside of the warehouse to the storage room is provided, and the stored articles are loaded and unloaded by an automatic cart or a hand cart 40 mounted on the rail R.

When the rail R is provided as described above,
A gap is generated between the rail R and the heat insulating door 5 to cause a cold air leak or an intrusion of outside air, and dew condensation and freezing (freezing) on the rail R.
May occur. SUMMARY OF THE INVENTION It is an object of the present invention to prevent cold air leakage and outside air from entering and avoid condensation or freezing .

[0006]

According to the present invention, in order to solve the above-mentioned problems, an insulating box 2 forming a storage room 3 and an opening 4 formed in a side wall 2C of the insulating box 2 are closed and opened. In a low-temperature storage provided with a heat-insulating door 5 and a rail for guiding a trolley 11 on which storage goods are loaded or unloaded when the storage goods are loaded or unloaded, an outside rail 7 provided outside the opening 4 is provided. Inside the storage room 3 on the extension of the outside rail 7
The height provided is approximately equal to the upper surface of the outside rail 7
, A heater 18 provided on the inside rail 16, and opposed inside and outside rails.
A gap 20 formed between the two and located below the heat insulating door;
This gap and the entire width of the opening 4 located below the heat-insulating door 5
The inside rail 16 and the outside rail 7 are provided vertically.
Receiving first door is substantially flush with the upper surface 21 and a second
A low-temperature storage provided with a door receiver 22 is provided, and the opening 4 is provided with an insulated door.
Leakage of cool air from opening 4 when closed at 5 and storage of outside air
This prevents the intrusion into the chamber 3 and prevents dew condensation or freezing of the inner rail 16 .

Further, the storage room 3 is installed on the floor and
, A heat-insulating door 5 for opening and closing the opening 4 formed in the side wall of the heat-insulating box 2, and a cart for loading and unloading the storage items when loading or unloading the storage items. In the low-temperature storage provided with a rail for guiding the storage room 3, the rail 27 buried in the floors 2 </ b> E and 2 </ b> D and extended from outside the storage to the inside of the storage room 3 and below the heat insulating door 5 near the rail 27 .
Buried along the rails 27 from the floor to the storage room 3 side
A low-temperature storage provided with the heater 33 and the heater 30 buried in the floor below the heat-insulating door 5, to prevent cold air from leaking from the opening 4, and to prevent dew condensation or freezing of the rail 27. is there.

[0008]

When the heat-insulating door 5 is opened and the carriage 11 is moved to carry or unload the stored goods, the carriage 11 is moved to the outside rail.
7 or the first door receiver 21 and the second door receiver
Over the inside rail 16 or the outside rail 7
Go to over's, when closing the heat insulating door 5 from above, the cross-sectional
The lower end of the heat door 5 is connected to the outside rail 7 without hitting the rail.
Also between the inside rail 16 and the inside rail 16, it comes into contact with the upper surfaces of the first door receiver 21 and the second door receiver 22, and closes the gap below the heat insulating door 5, so that it is possible to avoid cold air leakage or intrusion of outside air. Thus, it is possible to prevent condensation or freezing of the internal rail 16.

When the heat-insulating door 5 is slid left and right to close the opening 4, the lower end of the heat-insulating door 5 can contact the rail 27 and the floor 2E to close the gap under the heat-insulating door 5. Thus, it is possible to prevent cold air leakage or outside air intrusion. Furthermore, of each rail 27, below the heat insulating door 5
Part and a part closer to the storage room than this part,
Heaters 30 and 3 whose lower ends are embedded in floors 2E and 2D
3 is heated by the condensation and freezing of each rail 27 times
It becomes possible to avoid.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. Here, the same components as those in FIG. 7 are denoted by the same reference numerals, and detailed description thereof is omitted. 1 to 3, the heat insulating door 5 slides up and down to close the opening 4, and a lower end thereof is provided with a door heater 5H.
Further, a flexible under-door packing 5A made of, for example, resin.
Is provided. A pair of outside rails 7 are mounted and fixed on the floor 2D outside the warehouse. Each outer rail 7 is provided with a guide member 8 having a substantially L-shaped cross section. Numeral 11 denotes an automatic bogie. The bogie 11 is provided with four axles 12 each consisting of two front and rear axles, and a wheel 13 attached to each axle. In addition, 1
The axle 12 is provided with a drive unit 14 that houses a drive motor for the bogie 11.

Reference numeral 16 denotes an inside rail. The inside rail 16 is laid in the storage room 3 on the inside floor 2E, which is an extension of the outside rail 7, like the outside rail 7. A heater 18 for preventing condensation or freezing is provided along the inner rail 16. Here, an interval 20 is formed between the inner rail 16 and the outer rail 7 as shown in FIG. 1, and this interval 20 is located outside the opening 4 and below the heat insulating door 5. doing. And at the interval 20
In addition, first and second door receivers 21 and 22 made of , for example, wood or resin are provided below the heat insulating door 5 over the entire width of the opening 4.
The first and second door receivers 21 and 22, the outside rail 7, and the warehouse
The upper surfaces of the inner rails 16 are substantially equal. Also, the first door receiver 2
1 is provided with a concave portion 23 for escaping the driving portion 14 of the carriage 11. Also, the first door receiver 21 and the second door receiver 2
An interval 25 for passing a cable 24 for connecting the trolley 11 and an operation panel (not shown) is formed between the vehicle 1 and the vehicle 2.

[0012] In the low-temperature refrigerator configured as described above,
When carrying in the stored items, the stored items are placed on the trolley 11,
The cart 11 placed on the outer rail 7 is guided by the outer rail 7 and moves toward the opening 4. Then, the wheel of the rearmost axle gets over the first door receiver 21 and the second door receiver 22.
At this time, since the wheel of the second axle rests on the outside rail 7, there is no derailment. When the cart 11 moves in the direction of the storage room 3, the second wheel passes over the first door receiver 21 and the second door receiver 22. At this time, since the rearmost wheel is mounted on the inner rail 16, there is no derailment. further,
When the cart 11 moves, the front wheels respectively ride over the first door receiver 21 and the second door receiver 22 in sequence in the same manner as the rear wheels, and are placed on the interior rails 16. Then, the carriage 11 is guided by the internal rail 16 and moves to a predetermined position in the storage room. Stocks are unloaded from the moved trolley 11,
The carriage 11 is guided by the rails 16 and 7 inside and outside the warehouse again, moves over the first door receiver 21 and the second door receiver 22, and stops at a predetermined position outside the warehouse.

At the time of carrying-out work, the empty carriage 11 is guided by the outside rail 7 in the opposite manner to the above-mentioned carrying-in work, and is carried out by the storage room 3.
The front and rear wheels are moved to the first door receiver 21 and the second door receiver 2
2, the vehicle is guided by the inner rail 16 and proceeds to a predetermined position. Then, after the storage items are placed, the cart 1
1 moves in the outside direction, the front and rear wheels pass over the first door receiver 21 and the second door receiver 22, respectively, and the outside rail 7
To stop at a predetermined position outside the refrigerator.

Except during the above-mentioned loading and unloading operations, the heat insulating door 5 is closed, and as shown in FIG.
A contacts the upper surfaces of the first door receiver 21 and the second door receiver 22. Further, the door packing 5A is deformed to close the concave portion 23 formed in the edge cutting member 21. Further, the cable 24 passes through the interval 25, and the upper surface of the cable 24 is substantially equal to the upper surfaces of the first door receiver 21 and the second door receiver 22, so that the interval 25 is also closed by the door packing 5A. Furthermore, the inside rail 16 is heated by the heater 18 so that the temperature of the inside rail 16 becomes, for example, 2 ° C. or more when the temperature in the storage room 3 is set to, for example, −25 ° C. and used. The capacity is fixed. Further, when the temperature in the storage room 3 is set to, for example, 2 ° C., a thermo is provided so that the temperature of the rail 16 does not become, for example, 50 ° C. or more.
May be controlled. Further, the heater 5H below the heat insulating door 5 is energized, and the lower end of the heat insulating door 5 is heated to, for example, about 2 ° C.
Is kept above.

As described above, the rail on which the carriage 11 is placed and guided is provided by the insulated door 5 and the in-compartment rail 7 and the out-of-compartment rail 16.
And the first door receiver 21 and the second door receiver 22 are provided between the rails 7 and 16, so that when the heat insulating door 5 is closed, it is provided at the lower end of the heat insulating door 5. The door packing 5A is brought into contact with the upper surfaces of the first door receiver 21 and the second door receiver 22, and the lower part of the heat insulating door 5 located between the inside rail 7 and the outside rail 16 is almost completely closed. , It is possible to prevent leakage of cold air or intrusion of outside air into the storage room 3,
The cooling load can be reduced. In addition, the inside rail 7
Is heated by the heater 18 to prevent dew condensation and freezing on the inner rail 18 even when the outside air slightly invades. As a result, the carriage 11 can be derailed when loading and unloading the stored items. By avoiding it, the carriage 11 can be moved smoothly. Here, the lower part of the packing 5 </ b> A provided at the lower end of the heat insulating door 5 is inserted into the recess 23 of the first door receiver 21.
In addition, when the opening 4 is formed in a shape corresponding to the interval 25, the opening 4 can be more reliably closed.

In the above embodiment, the door receiver is replaced with the first door receiver 2.
Although the first and second door supports 22 are described as being divided, the same operation and effect can be obtained by using an integral door support depending on the shape of the cable and the like. When a manual truck is used instead of an automatic truck, it is not necessary to form the recess 23 and the interval 25 in the door receiver. Also,
In the case of a low-temperature storage in which the opening is closed by sliding the heat-insulating door 5 in the vertical direction, when the inside rail and the outside rail are divided and buried below the heat-insulating door 5 on the floor as in the above-described embodiment, Even if the first door receiver 21 and the second door receiver 22 are buried in the floor between the inside rail and the outside rail, it is possible to prevent cold air leakage or intrusion of outside air.

FIGS. 4 to 6 show another embodiment of the present invention. The same components as those in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description is omitted. The rail 27 on which the cart is placed extends from outside the warehouse to the interior of the warehouse, and is buried in the interior floor 2E and the exterior floor 2D such as a collet. The opening and closing direction of the heat-insulating door 5 is the left-right direction. When the heat-insulating door 5 is closed, a heater box 2 is provided on the outside floor 2D located below the heat-insulating door 5 so as to face the lower end of the heat-insulating door 5.
8 are buried. A heater 30 is provided in the heater box 28, and an upper surface opening is closed by a lid 31. Further, a heater box 32 is buried in the vicinity of each rail 27 of the outside floor 2D and the inside floor 2E from the outside to the inside of the storage room 3. Each heater box 32
Is provided with a heater 33, and the upper opening of each heater box 32 is closed by a lid 34. The heaters 30 and 33 are connected by wiring, and the wiring is connected to a power supply through a pipe 35 made of, for example, vinyl chloride or iron embedded in the outside floor 2D. And the outside floor 2D,
The upper surfaces of the heater box 28 and the heater box 32 are the same surface.

In the low-temperature refrigerator configured as described above,
For example, a hand-drawn cart 36 is placed on the rail 27, and the stored articles are placed on the cart 36, and the loading and unloading operations are performed manually. For example, a storage item is placed on the trolley 36, moved into the storage room 3, and the storage item is dropped from the trolley 36 into the storage room 3 and stored. When unloading the stored items, the empty cart 36 is moved to the storage room 3 and the stored items are placed, and then moved out of the warehouse, contrary to the above-described unloading. Then, the stored items are lowered from the carriage 36.

When the heat-insulating door 5 is closed except for the work of loading and unloading the stored goods, the packing provided at the lower end of the heat-insulating door 5 comes into contact with the upper surfaces of the heater boxes 28 and 32 and the outside floor 2D. . Further, when the storage items are stored and the cooling operation is being performed, each heater 30
And 33 are energized, and the heat of each heater is transmitted to the lower part of the heat insulating door 5 and each rail 27 near the heat insulating door 5. For this reason,
The temperature of each rail 27 near the heat-insulating door 5 is maintained at, for example, 2 ° C. as in the above embodiment.

According to the above embodiment, the heater box 28 and the heater box 32 are placed on the outside floor 2D or inside floor 2E located below the heat insulating door 5 near each rail 27.
Is embedded, the lower end of the heat insulating door 5 abuts on the upper surface of the outside floor 2D, the heater box 28, and the heater box 32 when the heat insulating door 5 is closed, and the gap between the lower end of the heat insulating door 5 and the outer floor 2D is removed. Can be eliminated, and as a result, the trolley 36
, It is possible to prevent cold air leakage or intrusion of outside air from the low-temperature storage for loading and unloading the stored goods, thereby reducing the cooling load. In addition, since the heat of the heaters 30 and 33 is transmitted to the rails 27 and the lower part of the heat insulating door 5, the respective temperatures are maintained at 0 ° C. or more. Can be prevented from dew condensation or freezing at the lower part, and as a result, the opening and closing of the heat insulating door 5 and the movement of the carriage 36 can be performed smoothly.

Here, when each rail 27 is divided into the outside of the warehouse and the side of the storage room, and the base is located between the outside rail and the inside rail, when the base is located between the outside rail and the inside rail, Leakage of cool air from the space can be more reliably prevented.

[0022]

The present invention is a low-temperature storage constructed as described above . When the bogie is moved by opening the heat insulating door,
First door from outside rail or inside rail with almost the same height
In-compartment rail or out-of-compartment rail beyond the receiver and the second door receiver
It can be moved smoothly,
When closed from one side, the lower end of the insulated door hits the rail
First between the outside rail and the inside rail without
Abuts on the upper surfaces of the door receiver and the second door receiver, and
Close the gap and prevent cold air leakage from the opening or intrusion of outside air.
Can be evacuated to prevent condensation or freezing of the inner rail.
As a result, loading and unloading operations using the trolley can be performed smoothly.

When the opening is closed by a heat insulating door
The lower end of the heat-insulating door abuts the rail and floor.
Can block the gap under the
Invasion can be avoided. In addition, out of the rail
The lower part of the thermal door and the part closer to the storage room than this part
Heated by heaters on the floor along the
The lower end of the heat insulating door is located on the floor between the heater and rail.
Heated by a heater embedded in the
The heater provided is used to heat the rails and heat the lower part of the heat insulating door.
The structure can be simplified by using it for heat.
Heated by each heater, from below the insulated door and the insulated door
Dew condensation and freezing of the rails to the storage room can be avoided, and as a result, the movement of the trolley when loading and unloading storage items
Can be performed smoothly, and loading and unloading operations can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is a partial vertical sectional view of a low-temperature storage.

FIG. 2 is a longitudinal sectional view of an opening of a low-temperature storage;

FIG. 3 is a partial front view of an opening with the heat insulating door closed.

FIG. 4 is a longitudinal sectional view of an opening of a low-temperature storage, showing another embodiment of the present invention.

FIG. 5 is an enlarged view of a main part of the longitudinal sectional view shown in FIG. 4;

FIG. 6 is a top view of an opening of the low-temperature storage shown in FIG. 4;

FIG. 7 is a schematic perspective view of a low-temperature storage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-temperature storage 2 Insulated box 2C Front wall 3 Storage room 4 Opening 5 Insulated door 7 Internal rail 11 Cart 16 External rail 18 Heater 21 1st door receiver 22 2nd door receiver

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 61-1775989 (JP, U) Japanese Utility Model Showa 55-3277 (JP, U) Japanese Utility Model Showa 47-28955 (JP, Y1)

Claims (2)

(57) [Claims] An insulated box forming a storage room therein, an insulated door for opening and closing an opening formed in a side wall of the insulated box, and a storage item placed and stored when loading or unloading the storage item. In a low-temperature storage provided with a rail for guiding a cart to be moved into and out of the chamber, an outer rail provided outside the opening and an upper surface provided in a storage room on an extension of the outer rail and having an upper surface
An inner rail having a height substantially equal to the upper surface of the rail, a heater provided on the inner rail, and an inner rail facing the inner rail.
Formed between the door and the outside rail and located below the insulation door
And the distance between the opening and the opening
It is provided over the entire width, and the upper surface is the inside rail and the warehouse.
A low-temperature storage , comprising a door receiver having a height substantially equal to the upper surface of the outer rail . 2. An insulated box installed on a floor and forming a storage room therein, an insulated door for opening and closing an opening formed in a side wall of the insulated box, and a storage item when loading or unloading the storage item. And a rail for guiding a trolley for loading and unloading the storage room into and out of the storage room, a rail buried in the floor and extending from outside the storage room into the storage room, and a heat insulating door near the rail.
A low-temperature storage, comprising: a heater embedded along a rail from below the storage room to the floor on the storage room side; and a heater embedded on the floor below the heat insulating door.