JPS5836666A - Automatic centrifugal dispenser - Google Patents

Abstract

PURPOSE:To provide a titled device which can move a gripping and transferring means for racks of centrifugal tubes which is stopped in an anomalous position easily to a correct position by so constituting the device that the switch connected to the power source line of a stepping motor for driving said means is opened only when the means is moved arbitrarily. CONSTITUTION:Racks 12 holding plural centrifugal tubes 11 contg. sampled blood are mounted via a rack removing port 4 in a rotor 31 of a centrifugal separator 3 by a gripping and transferring means 2. After the blood in the tubes 11 is separated to serums and blood-clots by the operation of the separator 3, the racks are again carried to a rack aligning device 13. During the normal operation of a stepping motor 21 driving said means 2, a switch 51 connected to the power source line of the motor 21 is held closed. When there is any abnormality in the stop position of the means 2, the switch 51 is opened manually to release the excitation generating holding torque in the motor 21 and the motor 21 is easily and arbitrarily rotated manually, by which the means 2 is moved and is corrected to the correct position.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic centrifugal separation device, and particularly to a gripping and transferring means for gripping racks in an alignment section and installing them into a centrifugal separator. ! When I wake up, I'm in the correct position at 9 o'clock.
The present invention relates to an automatic centrifugal sorting device with suitable means for making it possible to operate the device.

In automatic centrifugal preparative separation 1gt, the racks holding multiple centrifuge tubes containing collected samples are arranged from the alignment section, and the racks are grasped and loaded into the centrifuge, or the racks are removed after centrifugation. In order to efficiently and accurately operate the gripping and transporting means that performs this, a stepping motor is used as its driving source. and,
The stepping motor is operated by applying pulses corresponding to the number of steps calculated from the moving distance. Further, by detecting the stop position after outputting the pulse, abnormalities in the stop position are monitored.

However, in order to prevent the position of the gripping and transferring means from easily shifting even if an external force is applied while the stepping motor is stopped, an excitation pulse switching output is applied to the stepping motor to generate a holding torque when the stepping motor is stopped. ,
When an abnormality occurs in the position of the gripping/transferring means for some reason, it is difficult to set the gripping/transferring means to the correct seven positions, resulting in a disadvantage that the operability is significantly reduced.

The present invention has been made in view of the above, and its purpose is to provide an automatic system that can easily move the holding and transferring means to the correct position when the stopping position is abnormal, and that can improve operability. The purpose of the present invention is to provide a centrifugal separation device.

A feature of the present invention is that a normally closed switch is connected to the power line of the stepping motor that drives the gripping and transferring means, and when the gripping and transferring means is arbitrarily moved, the switch is turned on and the stepping motor is turned off. The main point is that it has a configuration that allows it to be disconnected from the power supply line.

The present invention will be explained in detail below using the embodiments shown in FIGS. 1 and 2.

FIG. 1 is a perspective view showing an embodiment of the automatic centrifugal separation apparatus of the present invention. In FIG. 1, reference numeral 1 indicates an alignment unit that aligns the racks 12 holding a plurality of centrifuge tubes 11 containing collected specimens, and 2 indicates an alignment unit 10 that grips the racks 12 and transports the racks 12 to the centrifuge 3. 21 is a stepping motor which is a driving source for the gripping and transferring means 2, and 4 is a rack outlet. First, first
Although not shown in the figure, the gripping and transferring means 2 is provided with a pin for detecting its position, and the stop position @VC of the gripping and transferring means 2 on the frame is marked. Further, a normally closed switch according to the present invention is connected to the stepping motor 21O [111in].

A rack 12Vi holding a plurality of centrifuge tubes 11 containing collected blood is gripped and transferred by the gripping and transferring means 2, and is transferred to the rotor 31 of the centrifuge S side 3 via the rack outlet 4.
4C can be installed. The blood in the centrifuge tube 11 is centrifuged into serum and blood clots by the operation of the centrifuge 3, and after the separation, the rack 12 is transported again to the centrifugation finished rack alignment section 13 by the gripping and transporting means 2.

During normal operation, the number of pulses calculated from the required operating distance is given to the stepping motor 1121 to rotate the stepping motor 21, thereby moving the gripping and transferring means 21, and the required number of pulses is After output, VC is set to check the stop position. However, the stopping position of the gripping and transferring means 21 may be incorrect for some reason. Therefore, in the present invention, in order to easily move the gripping and moving means 2 to the correct stop position in this case, a normally closed switch is connected to the power line of the stepping motor 21, and the gripping and moving means 2 is connected to the power line of the stepping motor 21. 2t - When moving to correct the stop position, this switch is to be opened. The reason for this is that, as mentioned above, when the stepping motor 21 is stopped, the excitation pulse switching output is applied to the stepping motor 21 to generate a holding torque. This is because it is difficult.

FIG. 2 is a circuit diagram showing an embodiment of the driving circuit for the stepping motor of the automatic centrifugal separation apparatus of the present invention. In FIG. 2, 21 is the stepping motor shown in FIG.
0 is a stepping motor control circuit, and 51 is a switch (not shown in FIG. 1) which is connected to the power source of the stepping motor 21 and is normally closed. Therefore, as shown in FIG. 2, since the switch 51 is closed during normal operation, the stepping motor 21t! It is operated by a stamping motor control circuit 50.

By the way, when there is an abnormality in the stop position fK of the grip and transfer means 2 shown in FIG. 1 and it becomes necessary to correct the stop position of the grip and transfer means 2, first, the switch 51 is opened by manual operation. In this way, since the excitation that generates the holding torque in the stepping motor 21 is released, the stepping motor 21 can be easily and arbitrarily rotated by manual operation, and thereby the gripping and moving means 2
can be moved and corrected to the correct stopping position.

In addition, when the stop position f1m positive is completed, the switch 51 is closed again.

As described above, the present invention has the effect that when the stop position of the gripping and transferring means is abnormal, it can be easily moved to the two correct positions, and operability can be improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of an automatic centrifugal sorting apparatus of the present invention, and FIG. 2 is a block diagram showing an embodiment of a driving circuit for a stepping motor of the automatic centrifugal sorting apparatus of the present invention. DESCRIPTION OF SYMBOLS 1... Aligning part, 2... Gripping transfer means, 3... Centrifugal separator, 4... Rack outlet, 11 River centrifugal tube, 12...
...Rack, 21...Stepping motor, 31...
・Rotor, 50...Stepping motor control circuit, 5
1...Switch. (#1 person) Figure 1

Claims (1)

[Claims] 1. Driving an alignment unit that aligns racks holding a plurality of centrifuge tubes containing collected specimens, a gripping and transferring unit that grips and loads the racks of the carcass alignment unit into a centrifuge, and a carcass gripping and transferring unit. An automatic centrifugal sorting apparatus equipped with a stepping motor, characterized in that it is equipped with a switch connected to a power supply line of the stepping motor, which is normally closed and opened when the gripping and transferring means is arbitrarily moved. Automatic centrifugal separation device.