JP2008002792A - Low temperature storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low temperature storage improving stacking workability to a housing space in a storage chamber upper part. <P>SOLUTION: In the low temperature storage R, a storage chamber 2 is formed in a heat insulation box 1 opened in a front face, grain G is held in the storage chamber 2, and it is stored in a low temperature state by a cooling device 4. It is provided with a partition shelf 18 vertically dividing a storage chamber 2 interior, and a lifting mechanism 22 vertically moving the partition shelf 18 in a horizontal state. The lifting mechanism 22 is provided with a gear motor 29 capable of vertically moving the partition shelf 18 in a state mounted with the grain G, and a controller C controlling the gear motor 29. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention forms a storage chamber in a heat insulating box that opens to the front, and stores and stores a storage object such as brown rice stored in a storage bag, etc. It relates to a low temperature storage.

  Conventionally, when grains such as brown rice are stored for a relatively long period of time, there has been a problem that the quality of the storage object is lowered due to the storage environment. Therefore, for example, in a barn of a farmer, a low temperature storage is used to store grains such as brown rice. Such a low-temperature storage forms a storage chamber in a heat insulating box that opens to the front, and a heat insulating door is provided in the front opening of the heat insulating box so that the front opening can be opened and closed.

A machine room is defined in the upper part of the heat insulation box, and a compressor, a condenser, a condenser blower, and the like constituting the cooling device are placed thereon. An evaporator and an evaporator blower are provided in the upper portion of the storage chamber, and a partition plate is provided below the evaporator and the blower. Thereby, a cooling chamber is formed between the partition plate and the storage chamber top surface. An opening is formed in the rear of the partition plate, and cool air is discharged from the rear of the partition plate to the storage chamber by the blower. The storage chamber has a predetermined temperature / humidity, for example, a grain having a temperature of + 10 ° C to + 15 ° C / humidity of about 60%. Cooled to suitable storage conditions. As a result, a plurality of items to be stored such as brown rice contained in a bag can be loaded on the bottom surface of the storage chamber and stored in a suitable temperature / humidity environment throughout the year (for example, Patent Documents). 1).
JP 2003-194456 A

  Here, in a low-temperature storage that normally stores grains such as brown rice, as the loading height increases, the heavy storage bag must be lifted to a high position, and the operation is difficult. Conventionally, as shown in Patent Document 1, a net shelf is installed above the storage room, and storage bags and other stored articles (for example, refrigerated food and vegetables) are directly placed on the net shelf. However, even in this case, if the placement surface is equal to or higher than the predetermined height, the operation is difficult.

  For this reason, even if the storage volume in the storage chamber has a predetermined volume, the mounting surface of a predetermined height or more is particularly heavy for a less powerful worker such as a woman or an elderly person. It is difficult to lift a storage bag or the like that is bulky, and it has been necessary to request a powerful worker or perform an operation of lifting and mounting the storage bag up to the mounting surface using a step platform.

  However, when using a platform or the like, it is dangerous to climb a stepladder while holding a heavy storage bag. Therefore, there is a problem that it is difficult to effectively use the storage volume above the storage chamber.

  The present invention has been made to solve the conventional technical problems, and an object of the present invention is to provide a low-temperature storage having improved loading and unloading workability into a storage space above the storage chamber.

  The low-temperature storage according to the present invention forms a storage chamber in a heat insulating box that opens to the front, stores an object to be stored in the storage chamber, and stores it in a low temperature state by a cooling device. A partition device that divides the partition shelf into a horizontal state, and a lift mechanism that moves the partition shelf up and down in a horizontal state. It is provided with a control device for controlling.

  According to a second aspect of the present invention, there is provided the low temperature storage according to the above invention, wherein the elevating mechanism includes a main shaft pivotally supported by the heat insulating box, a worm wheel and a sprocket attached to the main shaft, and the sprocket. A chain that engages and is fixed to the partition shelf and a worm gear that meshes with the worm wheel are provided, and the drive device rotates the worm gear forward and backward.

  According to a third aspect of the present invention, there is provided the low-temperature storage according to each of the above-mentioned inventions, wherein the control device includes means for stopping the drive device when the storage object on the rising partition shelf reaches a predetermined upper limit position. is there.

  According to a fourth aspect of the present invention, in the above-described invention, the control device includes a means for stopping the driving device when the descending partition shelf reaches a predetermined lower limit position.

  In the present invention, a storage chamber is formed in a heat insulating box that opens to the front surface, a storage compartment is stored in the storage chamber, and a partition that divides the storage chamber up and down in a low-temperature storage that stores it in a low temperature state by a cooling device. A shelf, and a lifting mechanism that moves the partition shelf up and down in a horizontal state. The lifting mechanism is a drive device that can move the partition shelf loaded with storage objects up and down, and a control that controls the drive device. Because it is equipped with a device, it is possible to move the partition shelf to an arbitrary height by controlling the drive device, the storage amount of the storage object loaded and stored on the partition shelf, and the bottom surface of the storage chamber The partition shelf can be lifted / lowered by the lifting / lowering mechanism according to the storage amount of the storage object loaded and stored thereon.

  In other words, when there is a large amount of storage objects loaded and stored in the storage chamber, the storage device can be easily moved up to the storage chamber by controlling the driving device and raising the partition shelf by the lifting mechanism. Can be loaded and stored. In addition, as the storage amount of the storage items stored below the partition shelf decreases, the partition device is lowered by the elevating mechanism by driving the driving device, and the objects loaded and stored on the upper surface of the partition shelf are stored. The stored item can be easily lowered. Thereby, the space formed in the upper part of the storage chamber can be used effectively. In addition, even when the height of the storage chamber is designed to be higher than that of the conventional one, it is possible to easily carry out the storage work of the storage object, and it is possible to increase the storage volume.

  In addition, since the lifting mechanism is moved up and down by controlling the driving device, even if a relatively heavy storage object is loaded on the partition shelf, it is easy to easily perform loading / unloading work, for example. The partition shelf can be moved to the position, and the lifting operation can be improved.

  According to the invention of claim 2, in addition to the above, the elevating mechanism includes a main shaft pivotally supported by the heat insulating box, a worm wheel and a sprocket attached to the main shaft, and the sprocket. And the worm gear meshing with the worm wheel, and the drive device rotates the worm gear forward and backward. Is not lowered by the load of the article placed thereon. Therefore, it is not necessary to provide a special stopper. Further, since the partition shelf can be raised and lowered by rotating the worm gear forward and backward by the drive device, it is possible to eliminate the work load as well as extremely good operability.

  Furthermore, in the invention of claim 3, in addition to each of the above-mentioned inventions, the control device is provided with means for stopping the drive device when the storage object on the rising partition shelf reaches a predetermined upper limit position. Thus, it is possible to stop the upward movement when the upper surface of the storage object on the partition shelf reaches a predetermined upper limit position regardless of the height of the storage object loaded on the partition shelf. Thereby, it becomes possible to raise the partition shelf to an appropriate position regardless of the height of the storage object loaded on the partition shelf, and avoid the disadvantage that a useless space is formed in the upper part of the storage chamber. Is possible. In addition, it is possible to avoid the inconvenience that the upper surface of the storage object on the partition shelf pushes up the top surface in the storage chamber, and the operability can be improved.

  In the invention of claim 4, in each of the above inventions, the control device is provided with means for stopping the driving device when the descending partition shelf reaches a predetermined lower limit position, so that the control device is set at the predetermined lower limit position. When it reaches, it becomes possible to stop the downward movement. Thereby, even if a child or the like is inadvertently entered below the partition shelf, it is possible to suppress the inconvenience of being injured by being pressed by the partition shelf.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1 is a front view of the low temperature storage R of the present invention, FIG. 2 is a front view of the low temperature storage R excluding the insulated doors 3 and 3, FIG. 3 is a longitudinal side view of the low temperature storage R of FIG. FIG. 5 is an enlarged plan sectional view of the portion of FIG. 4, FIG. 6 is a partially enlarged view of the upper portion of the low temperature storage R, and FIG. 7 is a partial enlarged view when detecting the upper limit position of the upper portion of the low temperature storage R. Is a partially enlarged view of the lower part of the low temperature storage R, FIG. 9 is a partial enlarged view when detecting the lower limit position of the lower part of the low temperature storage R, FIG. 10 is an electric block diagram of the control device C of the low temperature storage R, and FIG. The front view of the low temperature storage R except 3 is shown, respectively.

  The low-temperature storage R of the embodiment is a vertical low-temperature storage for storing grains that is installed in, for example, a farmer's barn and stores grains such as brown rice stored in a storage bag. The low-temperature storage R is configured by a heat insulating box 1 as a main body that opens to the front surface, and a storage chamber 2 is formed in the heat insulating box 1. Then, the front opening of the storage chamber 2 is closed openably and closably by the double-split heat insulating doors 3 and 3 pivotally supported around the hinges 5 and 5 at the respective side ends of the heat insulating box 1. Yes.

  A cooling device 4 is installed on the ceiling 1 </ b> A of the heat insulating box 1. In the cooling device 4, a known refrigerant circuit is configured by a compressor 6, a radiator 7, an evaporator 8, and the like. A radiator fan 61 (only FIG. 10 is shown) is installed in the vicinity of the radiator 7. The evaporator 8 is housed in a heat-insulating cooling box 11 attached to the ceiling 1 </ b> A of the heat-insulating box 1, and a cooling chamber 9 is formed in the cooling box 11. A blower 13 is provided on the cold air outlet side of the evaporator 8. Further, as shown in FIG. 3, on the discharge side of the blower 13 in the cooling box 11, a cold air discharge port 11 </ b> A formed to communicate with the inside of the storage chamber 2 is formed, and the evaporator 8 in the cooling box 11. Also on the cold air inflow side, a cold air suction port 11B formed to communicate with the inside of the storage chamber 2 is formed.

  Thus, when the compressor 6, the blower 13, and the condenser blower 61 are operated, the cool air sucked into the cooling chamber 9 from the storage chamber 2 through the cold air suction port 11B by the blower 13 is supplied to the evaporator 8. After being exchanged with the heat, it is discharged into the storage chamber 2 through the cold air discharge port 11A, and the storage chamber 2 has a predetermined temperature. In this embodiment, the storage object is a grain such as rice. Cooled to from 0 to + 15 ° C. Note that the cooling device 4 such as the compressor 6 can arbitrarily adjust the set temperature by a control panel 60 (only FIG. 10 is illustrated) formed on the front panel.

  On the other hand, in the storage chamber 2, a vertically movable partition shelf 18 that divides the storage chamber 2 up and down is installed horizontally. The partition shelf 18 is constituted by a heat insulating plate having a size that is slightly smaller than the plane size in the storage chamber 2. A small clearance is formed between the peripheral wall of the partition shelf 18 and the inner wall of the storage chamber 2, and the storage chamber 2 </ b> A formed above the partition shelf 18 and the storage chamber 2 </ b> B formed below the partition shelf 18. It is possible to distribute cold air.

  An elevating mechanism 22 is attached to the top surface 2 </ b> C of the storage chamber 2. The elevating mechanism 22 is located directly below the top surface 2C in the storage chamber 2 and is positioned at a substantially central portion in the front-rear direction, and extends in the left and right directions. The worm wheel 24 attached to the left side of the center, the sprockets 26, 26 attached to the left and right ends of the main shaft 23, and both sprockets 26, 26 are engaged on both sides in the storage chamber 2. Chains 27, 27 positioned at the substantially central portion in the front-rear direction, a rotatable worm shaft 28 extending back and forth corresponding to the position of the worm wheel 24, and attached to the front end of the worm shaft 28 via a coupling 25 A gear motor (drive device) 29 and a worm gear 31 which is attached to the rear portion of the worm shaft 28 and meshes with the worm wheel 24. And a etc..

  A gear motor 29 attached to the front portion of the worm shaft 28 is fixed to the inner wall surface of the storage chamber 2, and is connected to the control device C via a driver 62 that switches between forward rotation and reverse rotation of the gear motor 29. The worm wheel 24 is housed in a gear box 33 attached to the top surface 2 </ b> C, the rear part of the worm shaft 28 is also inserted into the gear box 33, and the worm gear 31 is located in the gear box 33. The rear part of the worm shaft 28 is rotatably held by bearings 34, 34 on the front and rear surfaces of the gear box 33.

  Further, as will be described later, the load from the partition shelf 18 applied to the chain 27 becomes a strong thrust load in the direction of pulling the worm shaft 28 backward via the sprocket 26, the main shaft 23, the worm wheel 24 and the worm gear 31. The bearing portion of the worm shaft 28 is pressed against the gear box 33 by this thrust load, and a great amount of force is required to rotate the gear box 33 as it is. Therefore, a thrust bearing 36 is attached to a position of the worm shaft 28 on the front side of the gear box 33 so that the rotation of the worm shaft 28 is lightened. Note that one end of the chain 27 (the lower end rotated backward from the sprocket 26) is fixed to the gear box 33.

  On the other hand, angle plates 37 and 37 are attached to both sides of the partition shelf 18 at substantially the center in the front-rear direction, and rollers 38 and 37 are attached to the front and rear surfaces of the angle plates 37 and 37 via attachment fittings 38A. A total of four 38 are attached one above the other. Furthermore, rails 39, 39 are attached to substantially the center in the front-rear direction on both side surfaces in the storage chamber 2 so as to extend vertically (at least over the movement range of the partition shelf 18 as will be described later). These rails 39 are slidably brought into contact with the outer surfaces of the rails 39, respectively. Thereby, the partition shelf 18 does not tilt in the front-rear direction. The angle plate 37, the roller 38, and the rail 39 also constitute a part of the elevating mechanism 22 for moving the partition shelf 18 horizontally.

  Further, the other end of each chain 27, 27 (the lower end portion rotated forward from the sprocket 26) is connected to an angle plate 37 by a holder 41 and three pins 42, as shown in FIGS. It is fixed to the outer surface. Thereby, the partition shelf 18 is suspended horizontally by the chains 27 and 27, and both the sprockets 26 and 26 are rotated in synchronization with the rotation of the main shaft 23, so that they are not inclined in the left-right direction.

  With such a configuration, when the gear motor 29 is rotated forward or backward by the control device C based on the operation of the control panel 43 as will be described later, the worm gear 31 is rotated via the worm shaft 28, and the rotation is caused by the worm gear 31. The sprockets 26 and 26 are rotated through the main shaft 23 by being transmitted to the wheel 24. Since the chains 27, 27 are wound up or lowered by the rotation of the sprockets 26, 26, the partition shelf 18 can be moved up and down.

  On the other hand, an upper limit position detection device 48 is provided across the left and right inner walls of the storage chamber 2 below the predetermined storage upper limit position of the upper portion of the storage chamber 2, in this embodiment, below the mounting height of the main shaft 23. ing. The upper limit position detection device 48 is configured by a wire 52 having one end fixed to the inner wall of the storage chamber 2 via a spring 49 and the other end having an upper limit position detection switch 50 attached thereto. The upper limit position detection switch 50 is connected to the end of the wire 52 via the actuator 51. Normally, that is, in a state where the upper limit position is not detected, the end of the actuator 51 and the end of the wire 52 form an acute angle (state shown in FIG. 6), and the partition on which the storage object is loaded from below. The shelf 18 rises, the upper surface of the storage object pushes the wire 52 upward, and the wire 52 is pulled upward, so that the end of the wire 52 to which the actuator 51 is connected and the end of the actuator 51 are at a predetermined obtuse angle. In this state, the upper limit position is detected (FIG. 7).

  On the other hand, a lower limit position detection device 53 is provided on the inner wall of the storage chamber 2 at a predetermined lower limit of the partition shelf in the lower portion of the storage chamber 2, for example, at a height of about 600 mm from the floor of the storage chamber 2 in this embodiment. ing. The lower limit position detection device 53 includes a lower limit position detection switch 54 fixed to the inner wall of the storage chamber 2 and an actuator 55 attached to the lower limit position detection switch 54. The actuator 55 is configured such that one end extends to a position corresponding to the lower end of the partition 18. Therefore, when the lower limit position is not detected, the actuator 55 and the lower surface of the partition shelf 18 are separated from each other (FIG. 8), the partition shelf 18 is lowered from above, and the lower surface of the partition shelf 18 is connected to the actuator 55. The lower limit position is detected by the lower limit position detection switch 54 by contacting and pushing down the actuator 55 (FIG. 9). In the present embodiment, the predetermined lower limit position is about 600 mm from the floor surface of the storage chamber 2, but is not limited to this. For example, a child, an operator, etc. It is desirable to have a height that can avoid the inconvenience of being injured or the like when pressed downward.

  In this embodiment, it is assumed that the lower end of the rail 39 of the partition shelf 18 as described above is formed at least to a position lower than the height at which the lower limit position detection switch 54 is provided.

  And the partition shelf control panel 43 is provided in the front opening edge of this storage chamber 2 in the predetermined height. The control panel 43 is provided with an upper button 44, a lower button 45, and a stop button 46 that operate to move the partition plate 18 up and down.

  Next, the control device C of the low temperature storage 1 will be described with reference to FIG. The control device C is constituted by a general-purpose microcomputer. On the input side, the control panel 60 for the set temperature, the partition control panel 43, the upper limit position detection switch 50, the lower limit position detection switch 54 as described in detail above are provided on the input side. And a storage chamber temperature detection sensor (not shown) is connected. On the output side, the compressor 6, the blower 13, the condenser blower 61, and the driver 62 of the gear motor 29 constituting the cooling device 4 are connected.

  With the above configuration, the storage room 2 stores the grain G (substance to be stored) such as brown rice stored in the storage bag. In this case, the gear motor 29 is rotationally controlled by operating each switch of the partition control panel 43, and the chains 27 and 27 are connected to the partition shelf 18 via the worm gear 31, the worm wheel 24, the main shaft 23, and the sprocket 26. Move the grain G to a height where it can be easily loaded.

  In this state, the grain G is loaded on the upper surface of the partition shelf 18. In this case, each time the grain G is loaded, the loading surface of the next loaded grain G rises. Therefore, even if the loading surface is lowered by operating the control panel 43. Good. Thereby, it becomes possible to improve workability | operativity in the loading operation | work of the heavy grain G, and a loading operation | work can be performed according to the height which an operator can perform easily.

  However, when the lower limit position detection switch 54 is detected by the control device C, the partition shelf 18 stops the gear motor 29 and stops the downward movement of the partition shelf 18. For this reason, the top of the control panel 43 is placed at a position where the loading operation becomes difficult when the partition shelf 18 is lowered to the lower limit position or when the grain G having an arbitrary height is loaded on the upper surface of the partition shelf 18. The button 44 is operated, the gear motor 29 is rotated forward, and the partition shelf 18 is moved up.

  At this time, by operating the stop button 46 of the control panel 43, it is also possible to stop the partition shelf 18 to an arbitrary height, but even if the operator does not operate the control panel 43 at all, As shown in FIG. 7, the uppermost surface of the grain G loaded on the upper surface of the partition shelf 18 pushes up the wire 52 constituting the upper limit position detecting device 48, and the spring 49 and the actuator 51 attached to both ends of the wire 52 extend upward. When the upper limit position detection switch 50 detects the upper limit position, the control device C stops the gear motor 29 and stops the upward movement of the partition shelf 18.

  At this time, the upper limit position is detected not only when all the uppermost surfaces of the grains G loaded on the upper surface of the partition shelf 18 push the wires 52 but also when only some grains G push the wires 52 up. Is possible.

  Therefore, regardless of the height of the grain G loaded on the partition shelf 18, the upward movement of the partition shelf 18 can be stopped when the upper surface of the grain G on the partition shelf 18 reaches a predetermined upper limit position. It becomes. As a result, the partition shelf 18 can be moved up regardless of the loading height of the grain G loaded on the partition shelf 18, thereby avoiding the inconvenience that a useless space is formed in the upper part of the storage chamber. It becomes possible to do. Further, it is possible to avoid the inconvenience that the upper surface of the grain G on the partition shelf 18 pushes up the top surface 2C in the storage chamber 2, and the operability can be improved.

  As described above, after raising the partition shelf 18 to a predetermined position, the grain G is also stored in the storage chamber 2B formed below the partition shelf 18 as shown in FIG. Thereby, the gear motor 29 is controlled by the control device C, and according to the storage amount of the grain G loaded and stored on the partition shelf 18 and the storage amount of the grain G stacked and stored on the bottom surface in the partition shelf 18, The partition shelf 18 can be moved up and down.

  Therefore, the grain G can be easily loaded and stored above the storage chamber 2 by raising and lowering the partition shelf 18 without using a step board such as a stepladder or a ladder. Thereby, the space formed in the upper part of the storage chamber 2 can be used effectively. Moreover, even when the height in the storage chamber 2 is designed to be higher than the conventional one (for example, about 2000 mm) (about 2500 to 3000 mm), it is possible to easily carry out the storage work of the storage object. It is possible to increase the storage volume and increase the storage amount.

  Further, since the partition shelf 18 is moved up and down by controlling the gear motor 29, even if a relatively heavy grain G is loaded on the partition shelf 18, it can be easily moved to an arbitrary position, for example, an unloading operation. The partition shelf 18 can be moved to a position where it can be easily performed, and the lifting operation can be improved.

  When the amount of grain G stored in the storage chamber 2B below the partition shelf 18 decreases, the gear motor 29 is rotated in reverse by operating the lower button 45 of the control panel 43, and the worm gear 31, worm wheel 24, the chains 27 and 27 are lowered via the main shaft 23 and the sprocket 26 to lower the partition shelf 18, and are positioned at an arbitrary position, for example, a position where the uppermost grain G loaded on the upper surface of the partition shelf 18 is easily lowered. Let

  Thereby, the grain G loaded and stored on the upper surface of the partition shelf 18 can be easily lowered as the storage amount of the grain G stored in the storage chamber 2B below the partition shelf 18 decreases.

  Further, as described above, since the rollers 38 of the angle plate 37 slide on the outer surface of each rail 39, the partition shelf 18 does not tilt in the front-rear direction and is suspended by the chains 27, 27. It does not tilt in the left-right direction. Therefore, the grain G on the partition shelf 18 does not fall during movement.

  In particular, since the worm gear 31 and the worm wheel 24 mesh with each other, unless the control panel 43 is operated and the gear motor 29 is driven, the worm gear 31 and the worm wheel 24 are not lowered by the load of the grain G on which the partition shelf 18 is placed. Therefore, it is not necessary to provide a special stopper. Moreover, since the partition shelf 18 can be arbitrarily raised / lowered only by operating the control panel 43, the operability is extremely good and the work load can be eliminated.

  Further, when the lower button 45 of the control panel 43 is operated, the gear rack 29 is reversely rotated and the partition shelf 18 is moved downward. The partition shelf 18 is moved to a lower limit position provided at a predetermined lower limit position. When the predetermined lower limit position is detected by the detection switch 54, the control device C stops the gear motor 29.

  As a result, it is possible to stop the downward movement when the predetermined lower limit position is reached, so even if a child, an operator, or the like is erroneously placed below the partition shelf 18, It is possible to suppress the inconvenience of being injured by being pressed.

  In the present embodiment, the wire 52 is used as the upper limit position detecting device for detecting the upper limit position, but the present invention is not limited to this, and for example, a configuration may be adopted in which the grain G is detected by an optical sensor or the like. To do.

It is a front view of the low-temperature storage of this invention. It is a front view of the low-temperature storage of FIG. 1 except a heat insulation door. It is a vertical side view of the low-temperature storage of FIG. FIG. 4 is a partially enlarged view of FIG. 3. FIG. 5 is an enlarged plan sectional view of a portion of FIG. 4. It is the elements on larger scale of the upper part of a low-temperature storage. It is the elements on larger scale at the time of the upper limit position detection of the upper part of a low-temperature storage. It is a partial enlarged view of the lower part of a low-temperature storage. It is the elements on larger scale at the time of the lower limit position detection of the lower part of a low-temperature storage. It is an electrical block diagram of the control apparatus of a low-temperature storage. It is a front view of the low-temperature storage except a heat insulation door.

Explanation of symbols

R Low temperature storage C Control device 1 Heat insulation box 2 Storage chamber 4 Cooling device 6 Compressor 7 Radiator 8 Evaporator 11 Cooling box 13 Blower 18 Partition shelf 22 Lifting mechanism 23 Main shaft 24 Warm wheel 26 Sprocket 27 Chain 28 Warm shaft 29 Gear motor (drive device)
31 Worm gear 33 Gear box 37 Angle plate 38 Roller 39 Rail 43 Control panel 44 Up button 45 Down button 46 Stop button 48 Upper limit position detection device 50 Upper limit position detection switch 52 Wire 53 Lower limit position detection device 54 Lower limit position detection switch

Claims (4)

In a low-temperature storage that forms a storage chamber in the heat-insulating box that opens to the front, stores the objects to be stored in this storage chamber, and stores them in a low-temperature state by a cooling device,
A partition shelf for vertically dividing the storage chamber;
An elevating mechanism for moving the partition shelf up and down in a horizontal state,
The elevating mechanism includes a drive device capable of moving up and down the partition shelf loaded with the storage objects, and a control device for controlling the drive device.   The elevating mechanism is engaged with the main shaft pivotally supported by the heat insulating box, a worm wheel and a sprocket attached to the main shaft, the sprocket, and fixed to the partition shelf. The low temperature storage according to claim 1, further comprising: a chain and a worm gear meshing with the worm wheel, wherein the driving device rotates the worm gear forward and backward.   3. The low temperature according to claim 1, wherein the control device includes means for stopping the driving device when a storage object on the rising partition reaches a predetermined upper limit position. Storage.   The low temperature storage according to any one of claims 1 to 3, wherein the control device includes means for stopping the driving device when the descending partition shelf reaches a predetermined lower limit position.

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