RU2782216C2 - Automatic device for emptying bags of frozen blood products - Google Patents

Abstract

FIELD: automatic devices.

SUBSTANCE: invention relates to an automatic device for emptying bags of a frozen drug, preferably a blood product. The automatic device contains a device for extracting the drug, a hopper for receiving the drug, conveying means for transporting the bag from the receiving area to the device for extracting the drug, a cutting device located on the trajectory of the bag between the receiving area and the device for extracting the drug. Moreover, the cutting tool is located on an oscillatory support, containing a tool configured to absorb the energy of collisions of the bag with the cutting tool and return the specified cutting tool to its original position.

EFFECT: invention makes it possible to increase the service life of the cutting blade while ensuring an increase in the operating cycles of the device for emptying bags and reduce the necessary maintenance for this device.

11 cl, 11 dwg

Description

The proposed invention relates to an automatic device for emptying bags with a frozen drug. Said frozen preparation is preferably a blood preparation.

The use of flexible plastic containers for storing blood products is widely known. Usually said flexible plastic containers are bags. The most common forms in which these blood products are commonly stored are whole blood, plasma, red blood cells and platelets.

Pharmaceutical laboratories specializing in blood products receive bags filled with blood collected from donors. Said blood product is delivered frozen to maintain said blood product in an optimal state of preservation. This frozen preparation must be removed from bags to undergo the necessary processing for its use in pharmaceutical applications.

Due to the variability in size and shape of already frozen bags, automating the process of removing a frozen blood product from bags presents numerous technical challenges. For this reason, the bag emptying process is typically performed manually or semi-automatically, which entails operators handling biohazards in a generally non-ergonomic manner.

European Patent Document 2548705 A1 entitled "Device for emptying a bag of blood product" describes a device for emptying bags of frozen blood product, consisting of a device for extracting the drug, a hopper for collecting the drug, a cutting device, a device for transporting the bag from the reception area into the device for extracting the drug, two holding elements and a drive device.

In the device disclosed in the above document, the transport means is responsible for transporting the frozen blood drug bag from the receiving area to the drug retrieval device. The specified device for extracting the drug consists of two rollers. These rollers rotate in opposite directions and are driven by a motor to ensure, when the bag is located between both rollers, that the said rollers carry the bag in the opposite direction, resulting in the contents of said bag falling into the drug collection hopper. In the middle between the receiving area and the extraction device, a blade is made in a fixed position. The specified blade is placed on the trajectory of the passage of the bag with the provision, when moving the conveyor from the receiving area to the device for extraction, the collision of the bag with the blade, while the specified blade breaks the specified bag. Due to this break in the bag, the rollers of the extractor can remove said bag and allow the blood product contained in the bag to enter the drug collection hopper.

Said device has the disadvantage that, due to the variability in the shape of frozen bags, in order to ensure that the blade breaks the bag, said blade must pass approximately through the middle of the bag body, where volume and mass are maximum. This means that when the bag collides with the blade, it is subjected to a large mechanical stress, causing the destruction of the said blade after several operating cycles.

If the blade breaks, the emptying process must be stopped to replace the blade. This time interval, in which the machine is stopped to change the blade, is an interruption in the process and therefore represents a significant economic loss.

The proposed invention is directed to increasing the life of the cutting blades and thus extending the operating cycles of automated processes for emptying bags of frozen blood products.

In the proposed invention, the above problem is solved by replacing the rigid support of the blade with an oscillatory system, made with the possibility of damping the impact of the blade with the bag. In addition, in the proposed invention, the transport means is replaced by other means, made with the possibility of changing the trajectory of their movement depending on the shape of the bag, and the cutting blade is also changed.

In the proposed invention, the transport means can use a function that provides the ability to change the trajectory of their movement in real time depending on the variable. The specified variable, on the basis of which the transport means change the trajectory of their movement, is the shape of the bag. In particular, the parameter used to change the trajectory of the transport means is the thickness of the bag. In this case, the transport means preferably comprise a robotic arm. To determine the thickness of the bag being transported from the collection area to the drug retrieval device, an oscillating blade system is preferably used as a measuring means.

One way of minimizing the stresses to which the blade is subjected is to provide a blade that is movable backwards. This can be achieved by adding a spring to the blade so that it can oscillate. However, the result obtained in this way will not be completely optimal, since this will cause a problem with the return of the spring and, accordingly, with the blade, after the specified blade has completed cutting the bag.

In order to overcome this drawback, in one particularly preferred embodiment of the present invention, a second spring is added to the oscillatory support of the blade. Thus, one spring is provided in charge of providing the necessary force for cutting and another spring is provided in charge of compensating the return force of the spring, so that the movement of the blade is not too abrupt and said blade is not subjected to large mechanical stresses.

In addition, in said preferred embodiment, the cutting blade is connected to the single-turn encoder by means of an elastic coupling such that the greater the force applied to the blade, the greater the compression of said elastic coupling. The specified compression of the elastic coupling is determined by the encoder, which then transfers the specified compression to the robot, and, accordingly, the specified robot changes the trajectory of its movement. Thus, if the bag is very thin, then the robot changes its trajectory slightly due to the very small oscillation of the blade. However, if the bag is very thick, then the robot will change its trajectory significantly as there is a significant backward movement of the blade. This allows you to make a uniform cut in the bag, while the blade is not subjected to excessive mechanical stress.

In the case of the proposed invention, the depth of cut in bags depends only on the temperature of the drug contained in said bags (usually blood plasma), and not on the shape of the bag. In addition, the impacts received by the transport means and the blade due to the different thicknesses of the bag are damped by the elastic blade support system.

In accordance with another aspect of the proposed invention, a new and more advantageous type of cutting blade is also disclosed. In an advantageous embodiment, the new blade is a blade having a continuous edge and two cutting edges. Although the sawtooth blade disclosed in European Patent Document 25487054 A1 can also be used with an oscillating support and a cutting means capable of changing its path, it has been experimentally determined that better results are achieved using a new blade having a continuous edge and two cutting edges. Thanks to the proposed new blade, the new functionality of the conveying means and the oscillating support of the blade can be used to the maximum advantage.

Accordingly, the proposed invention discloses an oscillating cutting system, which, together with transport means that are configured to change their trajectory of movement depending on the shape of the bags being cut (moreover, these components are included in an automatic device for emptying blood bags), increases the life of the cutting blade providing an increase in the operating cycles of the specified device for emptying bags and reducing the maintenance required for the specified device.

In particular, the proposed invention discloses an automatic device for emptying bags with a frozen blood product, containing a device for extracting the drug, a hopper for receiving the drug, transport means for transporting the bag from the receiving area to the device for extracting the drug, and a cutting means located on the trajectory of the bag between a receiving area and a device for extracting the drug, and the cutting tool is mounted on an oscillatory support, which contains a means configured to absorb the energy of collisions of the bag with the cutting tool and return the specified cutting tool to its original position.

After the blood product bag is ruptured by the cutter, the transport means deliver the bag to the drug retrieval device. Said drug ejection device preferably comprises two rollers. More preferably, both rollers are in contact with each other and rotate in opposite directions, which allows the bag to pass through these rollers with the application of longitudinal pressure along the entire bag. By means of such an arrangement, it is possible to extract the frozen blood product from the bag, and after being removed from the corresponding bag, the said blood product falls into the drug collection bin.

In one embodiment of the proposed invention, the cutting or tearing of the bag of blood product is performed with a cutting tool. In one preferred embodiment of the proposed invention, the cutting means is a means for transversely cutting the bag. In yet another more preferred embodiment, said cutting means comprises a blade. Preferably, said blade is a blade having a continuous edge and two cutting edges at an angle of 90°.

In one embodiment of the proposed invention, the cutting means is located in a fixed position on the trajectory of movement specified by the transport means for transporting bags of blood product from the receiving area to the area of the device for extracting the drug.

Preferably, said means for transporting the bag comprise a robotic arm. More preferably, these transport means are configured to change the trajectory of movement, set by them using a parameter. Even more preferably, said parameter is the shape of the bag to be cut and emptied. In the most advantageous possible embodiment, the parameter used to change the trajectory of the transport means is the thickness of the bag.

In one model, the oscillating bearing is configured to act as a measuring means for changing the trajectory of the transport means.

In one embodiment, the cutting means is mounted on the shaft of the rocker assembly. In one specific embodiment of the proposed invention, the cutting means mounted on the shaft of said rocker assembly may have a maximum oscillation of 15°. Other embodiments are also possible in which the oscillation of the cutting tool support is linear rather than angular.

In one embodiment, said rocker assembly comprises a shaft and a rocker. In a more preferred embodiment, said rocker arm is a half-cylinder, although in other embodiments, said rocker arm can be made in the form of a polygonal prism, a sector of a cylinder, and in other forms.

In one embodiment of the proposed invention, the rocker assembly shaft has different diameters along its length, allowing each diameter change to act as a stopper. Preferably, said shaft of the rocker assembly has two different diameters on its front.

In a preferred embodiment of the proposed invention, the annular ring, limited by two different diameters of the rocker assembly shaft on the front of this shaft, has at least one hole. The specified circular ring preferably contains two holes located along the horizontal shaft symmetrically about the vertical axis.

In one model, the cutting means includes an elongated groove and at least one hole. Owing to said elongated groove, the cutting means is mounted on the front part of the shaft of the rocker assembly with a smaller diameter, ensuring alignment of said at least one hole in the cutting means with said at least one hole in the annular ring limited by the change in shaft diameter. At the same time, the cutting means preferably contains two holes located symmetrically with respect to the longitudinal axis of the elongated groove.

In one embodiment of the proposed invention, the cutting means is attached to the shaft by inserting a retaining pin for each hole from the at least one hole in the cutting means and the shaft. At the same time, the cutting means is preferably located so as to adjoin the said cutting means on one side to the circular ring, limited by the change in the cross section of the shaft, and on the other side of the said cutting means to the handle to hold the blade. Said blade holding handle preferably includes an elongated hole allowing the front portion of the smaller diameter shaft of the rocker assembly to be inserted into said longitudinal hole in the blade holding handle. The fit between the shaft of the rocker assembly and the elongated hole in the handle is such that a large force is required to remove the handle, well in excess of the force to which the joint is subjected under normal operating conditions.

In one embodiment of the proposed invention, the means configured to absorb the impact energy of the cutting tool bag and return the cutting tool to its original position comprises at least one resilient means. Preferably, said at least one resilient means acts on the rocker. In a preferred embodiment of the proposed invention, the oscillating bearing comprises a rocker and at least two resilient means arranged to create opposite pairs of forces on the rocker. In one advantageous embodiment, said resilient means are springs. In other embodiments of the proposed invention, in which the vibrations of the cutting tool support are linear, the resilient means are arranged parallel to the direction of vibration of the support.

By arranging the resilient means in this way, some resilient means enable the necessary cutting force to be generated, while other resilient means compensate for the rebound force of the resilient means, ensuring that the blade does not move too abruptly.

Preferably, the resilient means generating the necessary cutting force or elastic compressive means have a spring constant (K) which is greater than the spring constant of the spring force compensating means (or simply the elastic compensating means). However, other embodiments are also possible, in which the resilient compensating means have a resilience constant greater than or equal to the resiliency constant of the resilient compression means.

In a preferred embodiment of the proposed invention, these springs are attached to the rocker at one end and to the spacer at the other end. In this case, said separator is preferably attached to the body of the oscillating blade by means of a non-permanent connection. Preferably, said means of non-permanent connection are bolts.

In one embodiment of the proposed invention, various internal parts are located inside the body of the oscillating blade. Said housing is closed at one of its ends with a lid having a sealing gasket on the inside. The cover has a central hole through which the shaft of the rocker assembly passes. At the same time, a latch is located between the shaft of the rocker assembly and the cover to ensure the sealing of the closure. Said cover is preferably connected to the oscillating blade body by means of a non-permanent connection. Preferably, said means of non-permanent connection are bolts.

In one embodiment of the proposed invention, a plurality of bearings are placed within the body of the oscillating blade, the purpose of said bearings being to support the shaft of the rocker assembly and to allow said assembly to rotate while minimizing friction.

In one model, the oscillating bearing includes a device configured to convert the position of the oscillating bearing into an output signal. Advantageously, said oscillating bearing comprises a device capable of converting the angular position of the cutting means into an output signal.

In one embodiment of the proposed invention, the rear end of the rocker assembly shaft is connected to an elastic coupling, which, in turn, is connected by means of a non-permanent connection to a device configured to convert the position of the rocker assembly into an output signal. Given that the cutting blade is rigidly connected to the rocker assembly, the position of the rocker assembly is equivalent to the position of the cutting blade. At the same time, said flexible coupling is preferably located inside the body of the oscillatory support, and the device, configured to convert the position of the rocker assembly into an output signal, protrudes outside the body of the oscillating blade through a hole in its rear end. Preferably, a latch is provided between the device capable of converting the position of the oscillating bearing into an output signal and the body of the oscillating bearing.

The purpose of the retainers and seals that are part of the various embodiments of the proposed invention is to ensure that the various connections in which they are placed are sealed to prevent possible contamination of the blood product. As the blood product withdrawn from the bags is used further for pharmaceutical applications, it is important to ensure that there is no contamination in said blood product.

In one embodiment, the variable used to determine the position of the rocker assembly is its angular position. In a preferred embodiment of the proposed invention, a device capable of converting the angular position of the rocker assembly into an output signal is an encoder. More preferably, the output of said encoder is an analog signal. As will be appreciated by those skilled in the art, in other embodiments in which the oscillation of the cutting tool support is linear, the sensor used to determine the position of said support and the cutting tool it holds is a sensor designed for that type of movement, then There is a linear position sensor.

In one embodiment of the proposed invention, the analog output voltage of the encoder varies depending on the angular position of the cutting means.

In one embodiment of the proposed invention, said encoder is connected to an analog input card. Said analog input card is configured to convert the analog output signal of the encoder into a digital signal that can be read by the robotic arm drive unit.

In one model, an automatic device for emptying bags of a frozen blood product includes a drive unit configured to change the trajectory of the transport means in accordance with a signal received from the device, configured to convert the position of the oscillating support into an output signal.

Said robotic arm drive unit is preferably a programmable logic controller. The specified programmable logic controller is configured to control the movement of the robotic arm.

More preferably, said programmable logic controller is configured to change the trajectory of the robotic arm depending on the angular position of the cutting means.

In one preferred embodiment of the proposed invention, the programmable logic controller is configured to ensure that the cutting means is located in a certain angular position, regardless of the thickness and/or shape of the bag being cut. The target angular position of the cutting means is defined as the target angle. In this advantageous embodiment, the programmable logic controller changes the trajectory defined by the robotic arm so that the angle determined by the cutting means is as close as possible to the target angle.

As used herein, "blood product" may refer to whole blood, blood plasma, or any other blood product. In this document, the terms "blood product" and "frozen blood product" are equivalent to each other. In addition, throughout this document, the terms "blade" and "cutting blade" are used in an equivalent and interchangeable manner. Throughout the text, the terms "oscillating blade" and "oscillating blade" are used in an equivalent and interchangeable manner. In this document, the terms "robot" and "robotic arm" are used in an equivalent and interchangeable manner.

For better understanding, explanatory but non-limiting drawings are provided for one embodiment of the proposed device for emptying bags of frozen blood product, in which:

- in Fig. 1 is a perspective view of an automatic device for emptying bags of frozen blood products;

- in Fig. 2 shows an axonometric projection of the oscillatory support of the blade;

- in Fig. 3 shows an axonometric projection of the oscillatory support of the blade in disassembled form;

- in Fig. 4 shows a longitudinal section of the oscillatory support of the blade;

- in Fig. 5 shows a cross-section of the oscillatory support of the blade;

- in Fig. 6 shows an axonometric projection of the oscillatory support of the blade in longitudinal section;

- in Fig. 7 shows, in front view, a blade known from the prior art;

- in Fig. 8 shows, in front view, the proposed blade;

- in Fig. 9 shows the various shapes that bags of frozen blood may have;

- in Fig. 10 shows an example of encoder and robotic arm height readings for a given target blade angle and a particular bag shape;

- in Fig. 11 is an operational block diagram for actuating a robotic arm.

In FIG. 1 shows an automatic device for emptying bags of blood product. In the embodiment shown in FIG. 1, it can be seen that there are two automatic devices for emptying blood bags in a single workstation. In the depicted embodiment, both devices share one hopper (7) for collecting blood products, and the remaining elements duplicate each other. In this embodiment, it can be seen that the transport means are a robotic arm (4). The specified arm (4) is configured to transport bags with a blood product (not shown) from the receiving area to the device (5) for extraction. The plastic bag is carried by the device (5) in the direction opposite to that of the frozen blood product, and said bag falls into the container (6) to collect the used bags.

In the embodiment shown in FIG. 1, the device (5) contains two parallel rollers, made with the possibility of rotation in opposite directions to ensure transfer, when the bag is located between both rollers, the indicated rollers of the bag in the direction opposite to the direction of the frozen blood product, as a result of which the blood product falls into the hopper ( 7) to collect.

In the embodiment in FIG. 1, in the middle between the receiving area and the device (5), a blade is made in a fixed position mounted on an oscillating support (1). The specified support (1) and the corresponding blade are placed on the trajectory of the bag with a collision, when the robotic arm (4) transports the bag from the receiving area to the device (5), the specified bag with the blade, and tearing the said bag with the blade. Due to this gap in the bag, the rollers of the device (5) can remove said bag.

The robotic arm (4) shown in FIG. 1 is configured to change its trajectory depending on the shape of the blood product bag being emptied. To this end, the oscillatory support (1) holding the cutting blade is also configured to act as a measuring means for determining the shape of the bag, and thus the arm (4) can change its trajectory accordingly. The purpose of changing the trajectory of said arm (4) is to maintain the cutting blade at a predetermined target angle.

In FIG. 2 shows the proposed oscillatory bearing (1) in its entirety. The internal components of said oscillatory bearing (1) are located inside the housing (100), which is closed on its front part by a cover (40). Since the cover (40) is connected to the body (100) by means of a non-permanent connection, in this case by bolts, the interior of the oscillating bearing (1) is easily accessible for replacement or maintenance of its internal components.

As can be seen in FIG. 2, the oscillating support (1) for fastening the blade (20) has, among other components, a fastening handle (10). Protruding from the back of the body (100) is an encoder (140) configured to convert the angular position of the blade (20) into an output signal. The output signal is then used to determine the path along which the transport means (not shown) should move.

In FIG. 3 is an exploded axonometric view of all the components of this embodiment of the oscillating bearing (1). As can be seen, a fixing handle (10) is provided at the front end of the oscillating bearing (1), the function of which is to ensure that the blade (20) is in the appropriate position. The blade (20) is located on the shaft (52) of the rocker assembly (50). As can be seen in FIG. 3, the shaft (52) of the rocker assembly (50) has different diameters along its length, allowing each diameter change to act as a stop. In the embodiment shown in FIG. 3, the blade (20) is adjacent to the reduction of the diameter of the shaft (52) of the rocker assembly (50) on its front part. In addition, for fixing the blade (20), the specified blade (20) and the circular ring, limited by the change in the diameter of the shaft (52), have two holes (53), each of which has mounting pins (54) inserted.

As can be seen in FIG. 3, the rocker assembly (50) comprises a rocker arm (51) which, in this embodiment, is semi-cylindrical. In the depicted embodiment, two springs act on the rocker arm (51), said springs being symmetrical about the vertical axis so as to create opposite pairs of forces on the rocker arm. In the depicted embodiment, the compression spring (60) has a spring constant (K) that is greater than the given spring constant for the compensating spring (70). The compression spring (60) is configured to generate the required cutting force, and the compensating spring (70) is configured to generate a return force compensating the compression spring (60), thus ensuring that the rocker arm (51) does not move too abruptly. ). In this embodiment, each of the two springs (60), (70) passes through bushings (61), (71).

In the embodiment shown in FIG. 3, the compression spring (60) and compensation spring (70) are attached at their upper end to the rocker arm (51) and at their lower end to the spacer (90). In this embodiment, the separator (90) is in the form of a cylindrical sector and is connected to the housing (100) by means of a non-permanent connection.

To support the rocker assembly (50) and the components located thereon, as well as to facilitate its rotation while minimizing friction, the oscillating bearing (1) has at least one bearing (80). In the embodiment shown in FIG. 3, the oscillating bearing (1) has four bearings (80) located along the shaft (52) of the rocker assembly (50).

As can be seen in the embodiment shown in FIG. 3, the shaft (52) of the rocker assembly (50) is connected at its rear to a flexible coupling (120), which in turn is connected to the encoder (140). The functions of the elastic coupling (120) are, among other things, to correct misalignments and dampen shocks and vibrations, as well as to ensure a smooth and silent transmission of movement. Said encoder (140) is supported by an encoder support (130). The support (130) has a central hole through which the encoder shaft (140) passes. Said transducer shaft (140) passing through the support (130) is connected to a flexible coupling (120). In the depicted embodiment, the transducer (140) is connected to the support (130) by means of a non-permanent connection, which in this case are bolts. In turn, the support (130) is located in the housing (100).

In the embodiment shown in FIG. 3, the internal components of the oscillating bearing (1) are located inside the housing (100). On its front part, the housing (100) is closed by a cover (40). As indicated above, the lid and body are connected, preferably by means of a non-permanent connection. To ensure a sealed closure, the lid (40) has a seal (41) on its inside. The cover has a central hole through which the shaft (52) of the rocker assembly (50) protrudes. As can be seen in FIG. 3, in the depicted embodiment, between the cover (40) and the shaft (52) there is a retainer (30), the purpose of which is to provide a seal and prevent the possibility of the blood product getting into the interior of the oscillating support (1), thus preventing contamination blood product and wear of the components of the specified oscillatory support (1).

In this embodiment, the transducer (140) protrudes through an opening in the back of the housing (100). In this case, between the specified hole in the rear part of the housing (100) and the encoder (140) there is a latch (110) to ensure sealing.

In FIG. 4 shows a longitudinal section of the oscillatory support (1). This drawing shows in detail the assembly of the various components and their arrangement in the oscillating bearing (1).

In FIG. 5 shows a cross section of the oscillatory support (1) of the blade. This drawing shows in detail the design of the rocker assembly (50) and other auxiliary components that provide the oscillatory nature of the support. In said drawing, as in this embodiment, the compression spring (60) and compensation spring (70) are attached, at their upper end, to the rocker (51) and, at their lower end, to the spacer (90). In addition, this drawing also shows how each spring (60), (70) has a corresponding sleeve (61), (71). The springs (60), (70) pass through the respective bushings (61), (71) with said bushings acting as guides. As can be seen in this drawing, in the depicted embodiment, both the springs (60), (70) and bushings (61), (71) are arranged symmetrically about the vertical axis.

In FIG. 6 shows an axonometric projection of the oscillatory support of the blade in a longitudinal section. This drawing shows with great clarity how the various components of the oscillating bearing (1) are arranged.

In FIG. 7 shows a blade used in the device disclosed in European Patent Document 2548705 A1. During the development phase of the proposed invention, it was noticed that although the previously used blade (2) is acceptable, nevertheless it is not the optimal solution for use in an oscillatory bearing (1) and in combination with transport means, made with the possibility changing its trajectory. For this reason, the design of the cutting blade has been optimized for use with the oscillating bearing (1) and with new conveyors.

In FIG. 8 shows an optimized blade for use in conjunction with an oscillating support (1) and transport means configured to change their trajectory. In the most optimal embodiment, the blade (20) has two cutting edges (23), (24) with a continuous edge, oriented perpendicular to each other. As can be seen, in this embodiment the blade comprises an elongated groove (21) and two holes (22) arranged symmetrically with respect to the longitudinal axis of the elongated groove (21). To mount the blade (20), the shaft (52) is located in an elongated groove (21), ensuring that the holes (22) are aligned with the corresponding holes (53) in the annular ring, limited by the change in the diameter of the shaft (52). Mounting pins (54) are inserted through the holes (22) in the blade (20) and through the holes (53) in the shaft (52) to ensure that the blade does not move. In addition, for fastening the blade, a mounting handle (10) attached to the shaft (52) is provided (see Fig. 2-4).

In FIG. 9 shows, for illustrative purposes only, three blood product bags (3), (3'), (3'') which show, by way of example, what different shapes blood product bags can have after freezing. As can be seen, bags (3), (-3'), (3'') are depicted with a significant difference in their shapes, which makes it difficult to automate the process of emptying said bags with a frozen blood product.

In FIG. 10 depicts, for illustrative purposes only, an example of the indication of blade angle (7000) and transport means height change (9000) values during cutting for a given target angle (8000) and a specific shaped blood product bag (3''').

As can be seen in this graph, as the bag thickness increases, this is reflected in the value of the blade angle (7000) read by the encoder (140). In this embodiment, the carriers are programmed in such a way that the trajectory does not change until the blade angle (7000) exceeds the target angle (8000), and from this point the height of the carriers begins to increase until the blade angle (7000) drops, and at this point the transport means stops its raising or lowering depending on the change in the angle (7000) of the blade. Finally, when the angle (7000) of the blade returns to its original position, the device detects that the bag has already passed through the blade and the conveyor is lowered to its original height.

In the proposed device, parameters such as the target angle (8000) of the blade, changes (9000) in the height of the vehicles depending on the angle (8000) of the blade, sensitivity to changes in angle and other similar parameters can be changed depending on the type of desired results ( maximizing blade life, minimizing cutting time and other such results.

Finally, in FIG. 11 is an operational block diagram for actuating the robotic arm (4) configured in this embodiment to act as vehicles. As can be seen in this drawing, the process begins with the encoder (2000) reading the angular position (1000) of the blade. In this embodiment, the encoder produces an analog output signal read by the analog input card (3000) responsible for digitizing the output of the encoder (2000). The output of the analog input card (3000) is read by the programmable logic controller (4000) (PLC). The target blade angle (5000) is also entered into the programmable logic controller (4000). Depending on the actual angle and the target angle of the blade, the PLC (4000) determines whether to raise or lower the robotic arm (6000) transporting bags of frozen blood product from the receiving area to the retrieval area.

The proposed invention is described and illustrated based on a representative example. It should, however, be understood that this exemplary embodiment does not in any way limit the proposed invention, and therefore any changes included directly or as equivalents in the content of the claims of the appended claims, should be considered as included in the scope of protection of the invention.

Claims (11)

1. An automatic device for emptying a bag with a frozen blood product, containing: a device for extracting the drug, a hopper for receiving the drug, transport means for transporting the bag along the trajectory from the receiving area to the device for extracting the drug, a cutting tool located on the specified trajectory and made with the possibility of cutting the bag over the hopper for receiving the drug, the support on which the cutting tool is installed, and the specified support contains a rocker assembly and is configured to oscillate to absorb the impact energy of the bag with the cutting tool and with the possibility of returning the specified cutting tool to its original position, while the rocker assembly comprises: a rocker arm, a shaft with a cutting tool mounted on it to provide angular oscillation of the cutting tool, a compressive spring configured to create the force required for cutting, acting on the rocker arm in the first direction, and compensation an induction spring configured to generate a force acting on the rocker in a second direction opposite to said first direction to compensate for the return force of the compressive spring. 2. The device according to claim 1, in which the transport means are configured to change the trajectory of the transport of the bag depending on the shape of the bag. 3. The device according to claim 1, in which the support is configured to act as a measuring means for changing the trajectory of the movement of the transport means. 4. The apparatus of claim 1, wherein the transport means comprise a robotic arm. 5. The device according to claim 1, in which the support includes a device configured to convert the angular position of the cutting means into an output signal. 6. The apparatus of claim 5, wherein the support comprises an encoder configured to convert the angular position of the cutting means into an output signal. 7. The device according to claim 6, containing a drive unit configured to change the trajectory of the transportation of the bag in accordance with the specified output signal. 8. The device according to claim 6, containing an elastic coupling designed to connect the encoder with the shaft of the rocker assembly. 9. The device of claim 1, wherein the cutting means comprises a blade. 10. The device of claim 9, wherein the blade has continuous edges and two cutting edges oriented perpendicular to each other. 11. The device of claim 1, wherein the spring constant of the compression spring is greater than the spring constant of the compensating spring.

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