KR101393257B1 - A sample box retractor and liquid gas frozen storage tank having the same - Google Patents

Abstract

The present invention relates to a sample box traction device for taking out a sample box from a liquefied gas freeze storage tank, the sample box traction device comprising: a box rim with a latch, a storage rack housing a plurality of box rims, And a box rim accommodating portion capable of accommodating the movable box retractor and the box rim and capable of being moved up and down, wherein the hook of the retractor is inserted into one of a plurality of box rims accommodated in the storage rack So that only one of the plurality of box rims can be seated in the box rim receiving portion and taken out.
According to the present invention, the storage rack can be taken out of a desired sample box while remaining in the liquefied gas freeze storage tank, thereby preventing unnecessary thawing which adversely affects the biological sample.

Description

[0001] The present invention relates to a sample box retractor and a liquefied gas freeze storage tank having the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sample box drawing apparatus and a liquefied gas freezing storage tank having the same, and more particularly, to a method of drawing a desired sample box from a liquefied gas freeze storage tank in a process of loading and unloading biological samples stored in a liquefied gas freeze storage tank Thereby minimizing the time during which the sample is exposed to the room temperature, and a liquefied gas freezing storage tank having the same.

Several types of cryopreservation forms are used for cryopreservation of goods or samples for scientific or industrial purposes. Freezers for keeping the temperature below minus 100 ° C are also used in that form. The liquefied gas, which contains liquid nitrogen and vaporized at low temperatures, is placed in a tank for freezing storage, and stored in a scientific or industrial It is possible to store the sample at low temperature by putting the objective sample in a tank with low temperature liquefied gas.

Refrigerated storage tanks for cold storage, including liquid nitrogen tanks, are generally cylindrical in shape, with the lower side clogged and the stomach in an open form, so that the refrigerated samples are stored with low temperature liquefied gas inside. The liquefied gas containing liquid nitrogen is put into the freezing storage tank more than a certain level, and the lid of the tank is closed to reduce vaporization of the liquefied gas, so that the low temperature state in the tank can be maintained for a certain period of time. The liquefied gas vaporizes over time and gradually decreases in volume. When the amount of liquefied gas is reduced below a certain level, the liquefied gas is replenished in the tank to maintain the low temperature continuously.

Biological samples such as bacteria, viruses, parasites, and cells, including human blood and tissues, are stored in liquefied gas freeze storage tanks, and the structure remains frozen, and deformation of biomaterials such as nucleic acids and proteins is minimized, It has the advantage that the biological activity including ability can be maintained for a long time.

To store these biological samples in a cryogenic storage tank, the sample is placed in a tube, the multiple tubes containing the sample are put back into a box, and the multiple boxes are placed in a single storage rack It is stored in a post-liquefied gas freezing storage tank to facilitate the process of putting in and taking out the desired sample, and it is possible to easily grasp the position of the desired sample. Currently, there are 25 or 98 sample tubes in a single box, and 5 or 10 boxes in a single storage rack.

However, in the process of inserting and removing the sample, all the samples in a plurality of sample boxes in the same storage rack other than the desired sample were exposed to the room temperature. The time required to insert and remove the sample is usually 30 to 60 seconds. When taking out or inserting only one sample directly from the liquefied gas storage tank, this time is not a problem. However, if the storage rack consisting of several sample boxes is taken out at room temperature at once, Is exposed to room temperature, reducing this time will have a large impact on maintaining the structural and biological activity of the sample. For example, if 10 boxes containing 98 sample tubes are stored in one storage rack, 980 samples will be exposed to room temperature during the extraction of one sample. In a storage rack with 980 samples, 980 samples are exposed to room temperature for at least 180 minutes for one year even if only 30 samples are put in or taken out.

In order to solve the problem of exposure of the cryopreserved sample at room temperature, a device and a method for conveniently taking out and loading the sample from a liquid nitrogen tank are disclosed in US Pat. . This invention allows the storage rack to be placed on top of a liquid nitrogen tank during sample loading and unloading, thereby reducing the time that the boxes are exposed to room temperature. However, this apparatus also has the disadvantage that many sample boxes are still exposed to room temperature, and in particular, sample boxes located at the top of the storage rack can not be prevented from being exposed to room temperature.

The present invention makes it possible to take out only one desired box from a liquefied gas freeze storage tank, thereby preventing room temperature exposure of remaining boxes stored in one storage rack except a desired sample box. In addition, the samples in the desired sample box are also exposed to room temperature for a short period of time to help preserve the biological activity of the sample.

The present invention contemplates a device that allows only one desired box to be retrieved from above the liquefying gas freeze storage tank and allows the box rim surrounding the sample box to be pulled out of the tank by being caught by the device, So that only one desired box out of the boxes can be selected and taken out.

(Patent Document 1) US20090255288 A1

When a desired frozen sample is put in or taken out from a liquefied gas freezing tank, many sample boxes are exposed to room temperature in addition to a desired sample box.

In order to solve the above problems, the present invention has devised a sample box traction device for taking out only a sample box containing a desired sample in a liquefied gas freeze storage tank including liquid nitrogen.

A sample box traction apparatus for withdrawing a sample box from a liquefied gas freeze storage tank, the apparatus comprising: a box rim within which the sample box is located and having a latch; A storage rack housing a plurality of said box rims; A movable retractor having a hook mating with said latch; And a container including a box rim accommodating portion capable of accommodating the box rim and capable of being moved up and down, wherein the hook of the retractor is hooked and moved to one of a plurality of box rims accommodated in the storage rack, Wherein only one of the plurality of box rims is seated in the box rim receiving portion so that the sample box can be towed.

In addition, the retractor and the container may include a rod having a groove on one side thereof, and the sample box traction device may further include a support for supporting the rod, wherein the support includes a projection having a protrusion 1 support; And a second support portion configured to receive the other side of the bar, wherein when the first support portion and the second support portion are combined, the up and down movement of the bar is limited.

Further, it is preferable that the apparatus further includes a rail positioned so that a support portion supporting the rod of the retractor can move.

The box rim receiving portion may include a bottom plate on which the box rim is seated; And a top plate positioned above the box rim seated on the bottom plate, wherein the top plate has a passage through which the rod of the retractor can move.

It is also preferred that the storage rack is located in a liquefied gas freeze storage tank comprising a cylindrical liquid nitrogen tank and the brackets of the box rim are positioned to view the center of the cylindrical liquefied gas freeze storage tank.

The storage racks are not limited to the frozen storage tanks which can be taken out from the liquefied gas freeze storage tanks one by one and can be taken out of the liquefied gas freeze storage tanks. The storage racks may include several storage racks connected to the freeze storage tanks or fixed to the tanks do.

It is preferable that the bar is marked with a scale indicating the degree of vertical movement of the bar.

Further, it is preferable that the lower cab is further provided with a box rim receiving portion which is pulled down to the rail.

In addition, the container may be movable in the vertical and horizontal directions, and may move integrally when the container and the retractor move in the horizontal direction.

The box rim is received in the shelf of the storage rack, and the box rim receiving portion includes a top plate and a bottom plate. The bottom plate engages with the concave and the convex, It is preferable to include irregularities that can be formed.

In order to solve the above problems, the present invention provides a liquefied gas freezing storage tank comprising a sample box traction device according to the present invention.

The liquefied gas freeze storage tank is cylindrical and further comprises a plurality of concentric concentric storage rack rails smaller in diameter than the cylindrical liquefied gas freeze storage tanks, wherein the storage rack is movably positioned over the storage rack rails .

As described above, according to the present invention, it is possible to take out only a desired sample box while keeping the storage rack in the liquefied gas freeze storage tank through the sample box traction apparatus according to the present invention, thereby preventing unnecessary room temperature exposure time which adversely affects the biological sample .

1 is a sectional view showing a sample box drawing apparatus according to a first embodiment of the present invention,
2 is a plan view showing a sample box traction device according to the present invention,
3 is a detailed view of a box and a box rim of a sample box traction device,
4 is a perspective view showing a sample box traction device according to the present invention,
FIG. 5 is a perspective view showing the supporting portion of the sample box traction device in detail,
FIG. 6 is a sectional view showing a sample box drawing apparatus according to a second embodiment of the present invention,
Fig. 7 is a side view and a plan view showing details of the unevenness of the second embodiment of the present invention, and Fig.
FIG. 8 is a layout diagram of storage racks and sample boxes installed in concentric circles when two concentric storage racks are installed according to the third embodiment of the present invention. FIG.

Structure of sample box traction device

Hereinafter, a sample box traction apparatus according to the present invention will be described in detail with reference to the drawings.

≪ Embodiment 1 >

1 and 2, a sample box traction apparatus according to the present invention includes a box rim 110, a storage rack 120, a retractor 200, a container 300, a support (not shown) 400, a rail 510, an upper cap 500, and a lower cap 600.

The sample box 10 accommodated in the liquefying gas freezing storage tank 1000 may be, for example, a rectangular parallelepiped, but any shape for containing the sample is possible. The sample to be stored in the sample box 10 may be a biological sample as an example, but any sample that can be stored at a low temperature is included.

The box rim 110 may position the sample box 10 therein.

The box rim 110 may be a rectangular frame for positioning the sample box 10 therein, for example, as shown in Fig. 3, but may be manufactured in any form capable of accommodating the sample box 10 have. Alternatively, the sample box 10 may be made of a rectangular parallelepiped having an open top, and the sample box 10 may be placed on the bottom of the box rim 110.

The box rim (110) includes a claw (111).

The latch 111 may be formed on the side of the box rim 110 and is mated with the hook 210 of the retractor 200. That is, when the hook 210 is fitted to the latch 111, the box rim 110 can be moved using the retractor 200. [ When the box rim 110 is moved, the sample box 10 located therein also moves.

The form in which the latch 111 of the box rim 110 is directly attached to the sample box 10 rather than the box rim 110 corresponds to another embodiment of the present invention. In this case, the hook 111 installed on the sample box 10 without the box rim 110 is fitted by the hook 210 and moved through the retractor 200.

A plurality of box rims (110) can be received in the storage rack (120).

The storage rack 120 includes a plurality of shelves 121 as shown in Figure 1 and includes a plurality of box rims 110 and a plurality of sample boxes 10 positioned within the plurality of box rims 110 Can be seated on a plurality of shelves (121).

In addition, the storage rack 120 can prevent the box rim 110 from falling off the shelf 121 unintentionally by installing the rack rod 125 in the storage rack 120.

The retractor 200 may include a hook 210 and a rod 220.

The hook 210 mates with the latch 111 of the box rim 110 and may be in the form of a hook, for example, but may be any shape capable of transmitting a force mating with the latch 111.

The rod 220 may be a cylindrical rod as an example, but it is apparent to those skilled in the art that the shape of the cross section is not limited to a circle.

The user may grasp the rod 220 and pull the hook 210 by hooking the hook 111 of the box rim 110 to pull the box rim 110 out. The user can grasp the rod 220 and pull the box rim 110 to seat it in the box rim receiving portion 310 of the container 300. At this time, the sample box 10 located inside the box rim 110 is also seated in the box rim receiving portion 310.

The rod 220 may have a groove 221 and may be formed as many as necessary. The groove 221 is to be described below, but is mated with the projection 411 of the first support portion 410.

The groove 221 in the rod 220 of the retractor 200 may be larger than the protrusion 411 of the support 400. This is because the hook 210 and the box rim 110 connected to the retractor 200, It is possible to move the hook 210 upward and downward when the pawl 111 is approaching each other so that the hook 21 and the box rim 110 can be easily engaged with each other.

The container 300 may include a box rim receiving portion 310 and a rod 320.

The box rim receiving part 310 serves to receive the sample box 10 located inside the box rim 110 and the box rim 110 and includes a lower plate 311 and an upper plate 312 .

The lower plate 311 is a portion where the sample box 10 located inside the box rim 110 and the box rim 110 can be seated.

The upper plate 312 is positioned at an upper portion of the box rim 110 mounted on the lower plate 311. The upper rim 312 includes a box rim 110 and a sample box 10 from being unintentionally disengaged from the box rim receiving portion 310.

The top plate 312 may include a passageway 312a.

The passage 312a is a passage of the rod 220 formed so that the rod 220 of the retractor 200 can attract the box rim 110 and seat it on the lower plate 311. Therefore, it may be formed long in one direction toward the box rim 110 as shown in FIG.

The rod 320 may be a columnar rod similar to the rod 220 of the retractor 200, but the shape of the cross section may be a polygon such as a rectangle or a triangle.

The user can move the bar 320 up and down to move the container 300 up and down.

The rod 320 may have a groove 321 like the rod 220 of the retractor 200 and may be formed as many as necessary. The groove 321 will be described below but is mated with the projection 411 of the first support portion 410.

The support 400 serves to support the rods 220, 320.

The support portion 400 may include a first support portion 410 and a second support portion 420.

The first support part 410 may include a protrusion 411 paired with the grooves 221 and 321 on one side of the rods 220 and 320.

The projection 411 may be rectangular as shown in FIG. 5 as an example, but any shape capable of restricting the upward and downward movement of the rods 220 and 320 in a pair with the grooves 221 and 321 is possible.

The second support portion 420 is formed to receive the opposite side of the other side of the rods 220, 320, that is, the portion where the grooves 221, 321 are formed. For example, as shown in FIG. 5, a semi-cylindrical shape may be recessed to accommodate the cylindrical bars 220 and 320.

Therefore, when the first support portion 410 and the second support portion 420 are engaged, the protrusion 411 can be engaged with the grooves 221 and 321 to limit the upward and downward movement of the rods 220 and 320. In this case, it is preferable that two supports 400 are positioned to control the bar 220 of the retractor 200 and the bar 320 of the container 300, respectively.

In this case, the user may move the retractor 200 and the container 300 in the vertical direction as much as desired, and then move the first and second supporting portions 410 and 412, The retractor 200 and the container 300 can be restricted from moving in the vertical direction.

Preferably, the rods 220, 320 may include a scale (not shown).

The scale can be displayed in large numbers so as to measure the degree of vertical movement of the bar.

The rail 510 is positioned such that the support portion 400 supporting the rod 220 of the retractor 200 can move. The rail 510 may be, for example, a passage formed in the upper cap 500 that covers the liquefying gas freezing storage tank 1000 as shown in FIG. Alternatively, it may be formed separately from the upper cap 500.

5, the support portion 400 has a groove and the rail 510 is engaged with the groove of the support portion 400, so that the support portion 400 is permitted to reciprocate in only one direction.

The lower cap 600 is located at a lower position spaced a predetermined distance from the upper cap 500 covering the liquefying gas freezing storage tank 1000 and includes a box rim receiving portion 310 between the upper cap 500 and the lower cap 600 It is desirable to secure a space in which the seat backrest can be seated.

The user pulls the box rim receiving section 310 containing the box rim 110 and the sample box 10 up to below the rail 510 formed on the upper cap 500 and places the box rim receiving section 310 on the lower cap 600, ).

Preferably, when the liquefying gas freezing storage tank 1000 is cylindrical, the storage rack 120 is positioned so that the latch 111 of the received box rim 110 faces the center of the cylindrical liquefied gas storage tank 1000 . In this case, the user can easily remove the rack rod 125 and take out the sample box 10 through the upper cap 500 easily.

Even in the case where the shape of the liquid nitrogen tank is not a cylindrical shape but a rectangular or pentagonal column, it can be included in the form of the present invention even when only a desired sample box is taken out through the upper cap as in the embodiment.

≪ Embodiment 2 >

6, a sample box traction apparatus according to the present invention includes a box rim 110, a storage rack 120, a retractor 200, a container 300, a support unit 400, A rail 510, and a lower cap 600.

All of the above components are the same as those of the first embodiment. Hereinafter, components having the same names but substantially different from those of the first embodiment will be described below.

The container 300 can be moved not only vertically but also horizontally.

Preferably, the container 300 and the retractor 200 move integrally when moving in the horizontal direction. In this case, the support portion 400 includes a first support portion 430 having projections mating with the groove 221, a second support portion 440 formed to receive the rods 220 and 320, And a third support 450 having projections that mate with the second support 450.

When both the first supporting part 430, the second supporting part 440 and the third supporting part 450 are engaged, the vertical movement of the container 300 and the retractor 200 is restricted, Quot;

The protrusions 122 may be positioned between the box rim 110 and the shelf 121 of the storage rack 120 as shown in FIG. Here, it is preferable that the unevenness 122 extends from the lower surface of the box rim 110. [ In this way, the irregularities 122 enable precise transfer of the box rim 110. In this case, the lower plate 311 of the box rim receiving part 310 may also include concavities and convexities 311a formed so as to be engaged with the concavities and convexities 122.

At this time, the upper plate 312 of the box rim receiving portion 310 is also inserted into the concave and convex portions 122 of the upper right shelf of the sample box 10 in which the sample box 10 to be taken out has the same concave and convex (not shown) .

The concave and convex protrusions 122 and the concave and convex portions 311a of the lower plate 311 are engaged with each other and the box rim 110 is seated on the lower plate 311. The user moves the retractor 200 to move the hook 210 The box rim receiving portion 310 is moved backward after the box rim 110 is freed from the storage rack 120 and the box rim receiving portion 310 is moved upward, (10) can be taken out.

Explanation of sample box traction method

Hereinafter, a method for towing a sample box using the sample box drawing apparatus according to the first embodiment will be described in detail with reference to the drawings.

The method of pulling the sample box using the sample box pulling apparatus is started by the user manually grasping the rod 320 of the container 300 and the rod 220 of the retractor 200 shown in Fig.

The user disassociates the supporting part 400 and moves the rods 220 and 320 up and down to move the retractor 200 and the container 300 to a height at which the desired sample box 10 is located. The retractor 200 and the container 300 can be easily moved up to the height of the desired sample box 10 by using the scales displayed on the rods 220 and 320 in this process.

After moving the retractor 200 and the container 300 to a desired height, the user joins the supporting part 400 to restrict the vertical movement of the rods 220 and 320.

The rod 220 of the retractor 200 with limited vertical movement is moved in the direction of the latch 111 of the box rim 110 until it is no longer moved. The hook 210 of the retractor 200 is moved up and down by using the groove 221 in the rod 220 of the retractor 200 which is slightly larger than the protrusion 411 of the support part 400, Lt; RTI ID = 0.0 > 111 < / RTI > Thereafter, the hook 210 is hooked on the latch 111 so that the retractor 200 and the box rim 110 can move in the horizontal direction as one body.

The user retracts the rod 220 to move the box rim 110 with the hook 210 engaged. At this time, the box rim receiving portion 310 is positioned close to and slightly lower than the shelf 121 of the storage rack 120 so that the box rim 110 can easily be seated in the box rim receiving portion 310 desirable.

After the rod 220 is fully retracted to seat the box rim 110 in the box rim receiving portion 310, the user releases the coupling between the support portion 400 and the two rods 320, The rod 320 is moved upward to pull the box rim receiving portion 310 up to a height at which the box rim receiving portion 310 can be seated on the lower cap 600.

The user can retrieve the sample box 10 located inside the box rim 110 housed in the box rim receiving section 310 after placing the box rim receiving section 310 on the lower cap 600.

The user can take out only the sample box 10 which is required while the storage rack 120 remains in the liquefied gas freezing storage tank 1000 through this process.

In the case of the second embodiment, since the movement of the retractor 200 and the container 300 in the horizontal direction takes place integrally, the method of drawing the sample box also shows a difference.

The user moves the rods 220 and 320 to position the retractor 200 and the container 300 at a desired height and to engage the support portion 400 to advance the retractor 200 and the container 300 together The unevenness 311a of the lower plate 311 of the container 300 is inserted into the unevenness 122 between the box rim 110 and the shelf 121 of the storage rack 120.

When the insertion is completed, the box rim 110 is seated on the lower plate 311, and the user can see that the groove 221 in the rod 220 of the retractor 200 is in contact with the protrusion 411 of the support portion 400 The hook 210 of the retractor 200 is hooked on the hook 111 of the box rim 110 by moving the rod 220 of the retractor 200 up and down using a slightly larger one.

Both the retractor 200, the container 300 and the box rim 110 are then retracted using the rods 220 and 320 so that when the box rim 110 is completely free from the storage rack 120, 400 can be disassembled to withdraw the sample box 10 located in the box rim 110 by pulling the box rim receiving portion 310 upward.

The hook 210 is hooked on the hook 111 of the box rim 110 to retract the box rim 110 and the box rim 110 to the box rim receiving portion 310, It is possible to prevent an accidental drop of the box rim 110 and the sample box 10 in the process of placing the sample box 10 located inside the apparatus.

Liquefied gas  Frozen storage tank

Hereinafter, a liquefied gas freezing storage tank including the sample box drawing apparatus according to the first or second embodiment will be described in detail with reference to the drawings.

It is preferable that the inlet of the liquefied gas freezing storage tank 1000 provided with the sample box drawing apparatus according to the present invention is formed larger than that of the existing liquefied gas freeze storage tank to facilitate the use of the sample box drawing apparatus.

The sample box pulling apparatus according to the present invention can be used in a case where many samples are stored in one liquefied gas freezing storage tank 1000 and two or three concentric circles are installed in addition to the case where the storage racks 120 are arranged in one concentric circle Can also be used.

Preferably, the liquefied gas freezing storage tank 1000 is cylindrical and further comprises a plurality of concentric storage rack rails 700 of a smaller diameter than the cylindrical liquefied gas storage tank 1000, The storage rack 120 is movably positioned.

In the third embodiment shown in FIG. 9, when the sample boxes 10 are arranged in the two concentric storage racks 120, the method of extracting the sample boxes 10 located in the outer concentric circle is schematically shown Respectively. In this case, when the sample box 10 is taken out from the storage rack 120 located outside, the sample boxes 10 on the inner concentric circle can interfere with each other.

To solve this problem, the storage racks 120 disposed in the inner concentric circles are arranged to be movable in a circular manner, and one of the inner concentric storage racks 120 or the opposite two storage racks 120 are removed A sample box (10) and a storage rack (120) are installed in the tank so that an empty space is generated.

When the sample box 10 is to be inserted into or removed from the storage rack 120 disposed on the outer concentric circle, a portion remaining as an empty space of the inner concentric circle is directed to the desired sample box 10 and the inner concentric storage rack 120 The sample box 10 can be inserted or removed in the same manner as in the first or second embodiment.

At this time, the sample box traction device may extend the rail 510 or deform the rods 220 and 320 of the retractor 200 and the container 300 so as to pull the sample box 10 on the outer concentric circle, Is preferable.

Although the preferred embodiments of the present invention have been described, the present invention is not limited to the specific embodiments described above. It will be apparent to those skilled in the art that numerous modifications and variations can be made in the present invention without departing from the spirit or scope of the appended claims. And equivalents should also be considered to be within the scope of the present invention.

10: Sample box
110: box rim
111: The brace
120: Storage Rack
121: Shelf
122: unevenness
125: Rack rod
200: Retractor
210: Hook
220: Rod
221: Home
300: Container
310: box rim receiving portion
311: Lower plate
311a: unevenness
312: top plate
312a: passage
320: Bar
321: Home
400: Support
410: first support portion
411: projection
420: second support portion
500: upper cap
510: rail
600: Lower cap
700: Storage rack rails
1000: Liquefied gas storage tank

Claims (8)

A sample box traction device for taking out a sample box from a liquefied gas freeze storage tank,
A box rim in which the sample box is located and has a latch;
A storage rack housing a plurality of said box rims;
A movable retractor having a hook mating with said latch; And
A container including a box rim accommodating portion capable of accommodating the box rim and being movable up and down;
/ RTI >
The hooks of the retractor are hooked on one of a plurality of box rims housed in the storage rack and only one of the plurality of box rims is seated in the box rim receiving portion to tow the sample box ≪ / RTI >
Sample box traction device.
The method according to claim 1,
The retractor and the container including a rod having a groove on one side,
The sample box traction device further includes a support disposed in an upper cap that covers the liquefier gas storage tank to support the rod,
The support portion
A first support having a projection mating with the groove; And
And a second support portion formed to receive the other side of the rod,
/ RTI >
Wherein when the first support portion and the second support portion are coupled, the rod is prevented from moving up and down.
Sample box traction device.
3. The method of claim 2,
Further comprising a rail positioned so that a support portion supporting the rod of the retractor can move.
Sample box traction device.
The method of claim 3,
The box rim receiving portion includes:
A lower plate on which the box rim is seated; And
And an upper plate positioned above the box rim seated on the lower plate,
Characterized in that the upper plate has a passage through which the rod of the retractor can move.
Sample box traction device.
The method according to claim 1,
The container can be moved up and down and horizontally,
Wherein when the container and the retractor are moved in the horizontal direction, the container and the retractor are integrally moved by the support for binding the container and the retractor.
Sample box traction device.
6. The method of claim 5,
Wherein the box rim is received in a shelf of the storage rack, a protrusion and a protrusion extending from a lower surface of the box rim are positioned between the box rim and a shelf of the storage rack,
Wherein the box rim accommodating portion includes an upper plate and a lower plate, and the lower plate includes irregularities that can be inserted and engaged with the irregularities.
Sample box traction device.
A sample box pulling apparatus according to any one of claims 1 to 6,
Liquefied gas storage tank.
8. The method of claim 7,
The liquefied gas freeze storage tank is cylindrical,
Further comprising a plurality of concentric storage rack rails smaller in diameter than the cylindrical liquefier gas storage tank,
And wherein the storage rack is movably positioned over the storage rack rails.
Liquefied gas storage tank.

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