JP2671643B2 - Rotation speed control device for rotating body for centrifuge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation speed control device for a rotating body for a centrifuge, which is used at a high speed for a limited maximum rotation speed and for a limited operating time.

[0002]

2. Description of the Related Art A conventional rotor for a centrifuge has a drawback that data such as an identification number, a serial number, and the number of times of operation are erased when subjected to a magnetic disturbance caused by approaching a magnet or the like. This measure has protection by parity-check, but when the data changes unfortunately, a problem occurs in that the maximum number of rotations used is exceeded.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to prevent the rotating body of the centrifuge itself from being used at a speed exceeding the maximum rotation speed.

[0004]

In order to achieve the above object, a rotation speed control device for a centrifuge rotor according to the present invention comprises:
A replaceable rotating body for separating substances having different densities using centrifugal force, a data holding device capable of reading and writing data such as an identification number, a production number, and the number of times of operation on the rotating body, and the identification number What is claimed is: 1. A centrifuge including a memory for recording corresponding maximum use rotational speeds in ascending order, and a magnetic head for reading the data, wherein the magnetic head stores the data in the data holding device when the rotating body starts rotating. Means for reading the stored data, the maximum rotation speed corresponding to the identification number from the memory, and the rotation speed set by the user are compared, and an alarm is generated when the rotation speed exceeds the maximum rotation speed. Means for stopping the operation and continuing the operation as it is when not exceeding.

[0005]

In the centrifuge of the present invention, when the rotating body starts rotating, the data stored in the data holding device is read by the magnetic head, and the maximum rotation number corresponding to the identification number and the rotation set by the user are read from the memory. If the number of rotations is compared with the set number of rotations and exceeds the maximum number of rotations used, an alarm will be issued and the operation will be stopped.
Since the rotating body is not rotated in a dangerous state, safety can be ensured. In addition, since the maximum usable speeds corresponding to the identification numbers are recorded in the memory in ascending order, even if the data changes due to magnetic disturbance, the rotating body must be used in excess of the maximum usable speed. There is no.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. FIG. 1 is a sectional view of an embodiment of the rotor for a centrifuge of the present invention, and FIG. 2 is a sectional view taken along the line II-II of FIG. In FIG. 1, 1 is a rotating body, 2 is a tube, 3 is a sample, 4 is a hub, 5 is a driving device, 6 is a base, 7 is an evaporator, 8 is a heat sensitive ring, 9 is a bellows, 10 is a data holding device, 11 Is a magnetic head and 12 is a rotating chamber. The sample 3 to be separated is inserted in the sealed tube 2 into the rotator 1, the rotator 1 is installed in the hub 4, and the driving device 5 rotates the sample 3 at high speed. A cylindrical data holding device 1 is provided at the bottom of the rotating body 1.
0 is provided and is close to the magnetic head 11 mounted above the rotary chamber 12. The data holding device 10 is shown in FIG.
3 is an enlarged view of FIG. In FIG. 3, 13 is a sleeve, 14 is a magnetic thin film, and 15 is a coating material.
A coating material 15 is deposited on the outer surface of the cylindrical sleeve 13, and the surface is protected by a disk 16. FIG. 4 is a block diagram of an embodiment of the present invention, FIG. 5 is a flow chart of an embodiment of the present invention, and FIG. 6 is an explanatory diagram showing the correspondence between the type of rotating body, the maximum number of rotations used, and the identification number. In FIG. 4, 17 is a centrifuge, 18 is a computing device, 19 is a data read / write device, and 20 is a memory. Rotating body 1
As shown in FIG. 6, the identification numbers are assigned in ascending order of the maximum rotation speed used and are stored in binary numbers on the magnetic thin film 14. Now, when the rotating body 1 starts to rotate, the magnetic head 1
In step 1, the data such as the identification number, the production number, and the number of times of operation stored in the data holding device 10 are read, and the maximum rotation speed corresponding to the identification number and the rotation speed set by the user are read from the memory 20 in the centrifuge 17. However, by comparing, even if the user sets the number of rotations that should not be allowed, the rotation does not occur in a dangerous state. Note that the identification numbers are registered little by little in consideration of adding a new rotary body 1 later.

[0007]

According to the present invention, even if a rotor for a centrifuge that holds the identification number of the rotor itself is mounted and the user sets the number of rotations higher than the maximum number of rotations of the rotor, there is no danger. Since the rotating body is not rotated, safety can be ensured.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of a rotor for a centrifuge of the present invention,

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is a partially enlarged view of FIG.

FIG. 4 is a block diagram of an embodiment of the device of the present invention,

FIG. 5 is a flowchart of an embodiment of the control of the present invention,

FIG. 6 is an explanatory diagram of an embodiment showing the correspondence between the type of rotating body, the maximum number of rotations used, and the identification number of the present invention.

[Explanation of symbols]

1 ... Rotating body, 2 ... Tube, 3 ... Sample, 4 ... Hub, 5 ...
Drive device, 6 ... Base, 7 ... Evaporator, 8 ... Heat sensitive ring, 9 ... Bellows, 10 ... Data holding device, 11 ... Magnetic head, 12 ... Rotating chamber.

Claims (1)

(57) [Claims] 1. A replaceable rotating body for separating substances having different densities by utilizing centrifugal force, and a data holding device capable of reading and writing data such as an identification number, a serial number, and the number of times of operation on the rotating body. A centrifuge including a memory for recording the respective maximum use speeds corresponding to the identification numbers in ascending order, and a magnetic head for reading the data, wherein the magnetic head is used when the rotating body starts rotating. When the means for reading the data stored in the data holding device, the maximum rotation speed used corresponding to the identification number from the memory, and the rotation speed set by the user are compared, and the set rotation speed exceeds the maximum rotation speed used. And a means for stopping the operation by issuing an alarm and continuing the operation as it is when it does not exceed the rotation speed control device for the centrifuge rotor.