This application claims the priority of the German patent application 10 2005 001 888, filed Jan. 14, 2005, as well as Swiss patent application no. 00135/05, filed Jan. 28, 2005. The whole disclosure of these two applications is incorporated herein by reference.
The present invention refers to an automatic storage device and a climate controlled cabinet for receiving laboratory objects, in particular microtiter-plates.
In chemical, pharmaceutical and biological research large amounts of samples have to be tested, manipulated and stored. The storage of the samples often occurs in so-called microtiter-plates, which comprise a plurality of fine receiving recesses for the samples. Microtiter-plates have, as a rule, a standardised size with a footprint of approximately 127.76 millimetres×85.48 millimeters (each +/−0.5 millimetres) according to standard ANSI/SPS 1-2004, Jan. 8, 2004, “for microplates—Footprint Dimensions”, and a plurality of devices has been provided for storing such plates or similar laboratory objects, such as so-called laboratory flasks.
EP 1 332 987 describes a storage device with a storage alley with two shelf racks arranged along the storage alley and a shelf access device displaceable along the storage alley. The shelf access device comprises a pickup device that is adjustable in height and extendible, by means of which laboratory objects stored in the shelf racks can be picked up. In particular for high shelf racks, care must be taken in such plants in order for the shelf rack and the shelf access device to be sufficiently stable, such that vibrations and in particular an undesired tilting and/or a torsion of the components are avoided. This increases, however, the weight of the components, which makes the construction more expensive and reduces the speed of the plant.
It is an object to provide a device of this type with a sufficiently stable shelf access device.
This object is achieved by the storage device of the independent claims.
According to the invention an upper and a lower guide are provided, between which the vertical guide is arranged.
In a first aspect of the invention the longitudinal drive for displacing the vertical guide along the horizontal guides comprises upper and lower drive means. The upper drive means serve to drive the vertical guide along the upper horizontal guide, while the lower drive means serve to drive the vertical drive along the lower horizontal guide. By driving the vertical guide at its upper and lower end section, a tilting of the same while accelerating and decelerating can be avoided even if the vertical guide is built in comparatively light and/or long manner.
In a second aspect of the invention the vertical guide is mounted, in its upper and lower end section, in non-pivotal manner on the upper and the lower horizontal guide, such that a torsion of the vertical guide (16) is avoided. The term “non-pivotal” is to be understood such that the respective end of the vertical guide cannot rotate in respect to the respective horizontal guide about a vertical rotational axis. This measure again improves the stability of the vertical guide, which allows a simple and therefore lighter construction.
In a third aspect of the invention the vertical pillars of the shelf racks are tightly connected to the shelves such that a mutual bracing and stabilisation is achieved.
In a forth aspect the invention relates to a climate control cabinet with an automatic storage device for laboratory objects, in particular microtiter-plates, with at least one storage rack and a shelf access device. The storage rack comprises several storage positions arranged above each other for receiving laboratory objects. The shelf access device comprises at least one drive for a vertical and/or horizontal movement. The drive comprises a gear engaging a cograil. Using cograils in climate controlled cabinets is advantageous because cograil-drives operate flawlessly in a wide temperature range. This is not necessarily the case e.g. with belt drives.
The invention relates to a climate controlled cabinet with a corresponding storage device.
Further embodiments, advantages and applications of the invention are given in the dependent claims as well as in the following description, which refers to the figures. These show:
The climate controlled cabinet of
At one end of the climate controlled cabinet, in the extension of the storage alley 5, a transfer station 7 is arranged. It serves for temporarily receiving individual laboratory objects during a transfer between the pickup device 17 of the shelf access device 6 and an external trans-port system. The transfer device 7 consists e.g. of a support table mounted to a wall 10a of the climate controlled cabinet for receiving the laboratory objects and is arranged at an automatic door 8 in the wall 10a of the storage cabinet. The size of the automatic door 8 corresponds approximately to the size of the laboratory objects to be transferred, such that climate losses when opening the door 8 remain small.
The automatic door 8 can also be arranged in the wall 10c opposite to the wall 10a.
At the end of the storage cabinet opposite to the automatic door 8, in a second wall lob parallel to the storage alley 5, a further access door 11 is provided. Through this door, which opens outwards, the users can gain access to the climate controlled cabinet. The door leads to a antechamber 13, which is formed between the shelf racks 4 and the third wall 10c opposite the shelf racks 4. The control unit 3 is arranged in this antechamber 13.
In the embodiment of
The design of the storage device is best seen from
A horizontal drive 18 mounted to the upper end of the vertical guide 16 serves to move the vertical guide 16 along the upper horizontal guide 15 and drives a gear engaging a cograil 19 of the upper horizontal guide 5.
The movement of the vertical guide 16 in respect to the upper horizontal guide 15 is picked up by a gear 60. The gear 60 is rotationally mounted to the vertical guide 16 and engages the cograil 19 of the upper horizontal guide 15. When the vertical guide 16 moves along the upper horizontal guide 15, the gear 60 is therefore rotated. A transmission 61 transfers this rotation to a shaft 62, which extends along the vertical guide 16 to its lower end 63 (see
A vertical drive 20 (in
A vertical column 23 is provided for holding the pickup device 17, which column is connected at its lower end to a horizontal holding arm 24. An elongate table 25 is mounted to the end of the holding arm 24 opposite to column 23. The table 25 can be pivoted in respect to the holding arm 24 about the vertical axis A. As can be seen from
An elongate carrier 26 is arranged on the table 25 and displaceable along the longitudinal axis of the table. An extension drive 28 is provided on the table 25 for moving the carrier 26. Table 25 and carrier 26 form, together, the pickup device 17, which is pivotal about axis A and extendable along an extension direction X.
Further, a separating device 30 is arranged on the column 23. The separating device 30 can be driven by means of a first separating drive 31 vertically along column 23. It comprises a gripper 32 for laterally engaging the laboratory object. The gripper 32 comprises at least two, preferably four, fingers 33a-33d extending downwards, which can be horizontally moved against each other by means of a second separating drive 34.
The separating device 30 is located, as seen in longitudinal direction of the storage alley 5, either before or behind the pivotal axis A.
The pickup device 17 can be pivoted, by means of the pivotal drive 28, into three positions. In a transfer position, which is shown in
Also, in the transfer position the pickup device 17 can transfer laboratory objects and/or covers through the door 8 to the transfer station 7 or pick them up from the same.
From the transfer position the pickup device can, as shown by a double arrow in
A second embodiment of the pickup device 17 is shown in
The method of operation of the embodiment of
The design of the shelf racks 4 is best seen in
A part of a storage rack 42 is shown in
The storage racks 42 are self-supporting units, and each storage rack can, with any laboratory object stored therein, be withdrawn as a whole from the storage device or climate controlled cabinet.
A gap 46 is provided between opposite supports or ribs 45, which is wider than the extendible carrier 26. The bottom side of the laboratory object 40 is freely accessible in the region of this gap 46. In order to engage the laboratory objects, the pickup device or the carrier 26 can be inserted into the gap 46.
The function of the described device is as follows:
In order to withdraw a given laboratory object from a known position in the shelves 4 of the storage device, the pickup device 17 is pivoted into the exchange position and horizontally and vertically displaced in such a manner that it is located in front of the storage position 47 of the given laboratory object, namely such that the upper side of the carrier 26 is somewhat lower than the bottom side of the laboratory object. Then, the carrier 26 is extended into the shelf rack 4 and lifted, by means of the vertical drive 20, until it enters the gap 46 and lifts all of the laboratory objects arranged behind each other on the ribs 45 of the respective storage position 47. Now the carrier 26 is again retracted and the pickup device 17 is pivoted into the transfer position. In this intermediate storage position the carrier 26 is extended so far that the laboratory object 40 to be withdrawn comes to lie exactly below the separating device 30. Now the separating device 30 is lowered, engages the laboratory object 40 and lifts the same. After having removed the desired laboratory object 40 in this manner from the pickup device 17, the pickup device 17 is pivoted back to the exchange position, extended into the shelf rack and lowered somewhat, such that the remaining laboratory objects are again deposited in their storage position 47. The now empty carrier 26 is retracted, pivoted into the transfer position and extended so far that its end section lies below the separating device 30. The separating device is again lowered and releases the previously withdrawn laboratory object 40 onto the carrier 26. Now the pickup device 17 can be driven to the door 8. The door 8 is opened and the carrier 26 is extended and lowered such that it deposits the laboratory object in the transfer position 7.
To deposit an individual laboratory object 40 at a given position in the shelf racks 4, the reverse process is used. The pickup device 17 drives to the door 8, the carrier 26 is extended and lifts the laboratory object 40 furnished at the transfer position 7. The carrier 26 is retracted. The laboratory object 40 is brought into the region of access of the separating device 30, which removes it from carrier 26. The pickup device 17 is driven to the desired storage position 47 and pivoted to the exchange position. The carrier 26 extends, lifts the laboratory objects already present in the storage position 47, retracts and pivots to the transfer position. It is extended horizontally so far that a free space of the table comes to rest below the separating device 30, whereupon the separating device 30 deposits the new laboratory object there. Then all laboratory objects on the carrier 26 are placed back into the shelf rack, for which purpose the carrier 26 pivots back into the exchange position, extends, is lowered, and deposits the laboratory objects 40 on the supports or ribs 45. Then the carrier 26 is again retracted.
In order to reach a higher transfer capacity, it is also possible to handle several laboratory objects 40 at the same time on table 25. For example the carrier 26 can withdraw three laboratory objects behind each other from a shelf position and bring them, together, to the transfer position 7, where the laboratory objects are taken over or handled together. In opposite manner several storage objects can be brought from the transfer position 7 in a single working step, together, to a storage position and deposited there behind each other.
It is further possible, that the separating device 30 is able to temporarily store several laboratory objects at the same time. For example, it can pick up several laboratory objects, which are then received by the transfer position 7. For this purpose the transfer position must be provided by means for directly receiving the laboratory objects from the separating device 30.
The rotation of the upper gear 60 is, as in the first embodiment of
Hence, the described device, as the one of
As can in particular be seen from
The non-rotational mounting of foot 76 on the lower horizontal guide 15′ prevents a torsion of the vertical guide about its longitudinal axis. Such a torsion can, otherwise, occur in particular if the pickup device 17 is located in the lower region of the vertical guide.
A non-rotational support of the vertical guide 16 is preferably provided at both of its ends. In the present case the carriage 71 also forms such a non-rotational support at the upper end of the vertical guide 16, e.g. by guiding the two pressure rollers 72 in suitable guiding grooves (not shown).
Hence, a non-rotational support is achieved, in the shown embodiments, by the fact that the vertical guide 16 is guided at the upper and the lower horizontal guide 15 and 15′, respectively, by means of at least two spaced apart pairs of pressure rollers and/or gears.
In the embodiment of
In the embodiment of
The embodiment shown here can be adapted in various manner to the respective requirements.
For example a single shelf rack extending along storage alley 5 can be provided instead of two shelf racks 4.
If different types of laboratory objects are to be stored, different storage racks with correspondingly sized storage positions can be provided.
The cograils 19, 21, 35a, 65 used in the embodiments can also be replaced by belt drives. However, belt drives are not well suited for wide temperature ranges, such as from −20° C. to +70° C. as they can exist in a climate controlled cabinet, for which reason it is preferred to use cograils and corresponding driving gears.
In the shown embodiments the horizontal drive 18 is arranged at the upper horizontal guide 15. Depending on available space it can also be arranged at the lower horizontal guide 15′. In this case shaft 62 transmits the driving energy from the bottom to the top.
It is also possible to provide two separate, synchronously operated horizontal drives, one of which drives the vertical guide 16 at the upper horizontal guide 15. The other drives the vertical guide 16 at the lower horizontal guide 15′. In this case shaft 62 can be dispensed with.
While the present application describes preferred embodiments of the invention, it is to be distinctly pointed out that the invention is not limited thereto, but can also be carried out in different manner within the scope of the following claims.
Number | Date | Country | Kind |
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10 2005 001 888.2 | Jan 2005 | DE | national |
135/05 | Jan 2005 | CH | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/CH06/00029 | 1/12/2006 | WO | 00 | 4/28/2008 |