JPH08155342A - centrifuge - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a door lock mechanism of a centrifuge, and an object thereof is to provide a shock even if a rotating body is damaged and a fragment thereof collides with a door lock portion. Make sure that the door lock is not accidentally released. [Structure] A solenoid cover 14 that is movable in the same direction as the lock bar 10 is provided on the side opposite to the lock bar 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a centrifuge having a door lock mechanism.

[0002]

2. Description of the Related Art A conventional door lock mechanism will be described with reference to FIG. FIG. 5 is a cross-sectional view showing a conventional door lock portion, in which a door hook 3 having a hook portion 4 such as a hole is a door 2
It is fixed to. The lock bar holder 9 is fixed to the table 6 of the centrifuge, the lock bar 10 is mounted in the hole of the lock bar holder 9, and one end thereof is connected to the electromagnetic solenoid 11 and the pin 12. The lock bar 10 is pressed by the spring 13 in the direction opposite to the arrow A.
When the power of the centrifuge is turned on, the electromagnetic solenoid 11 is energized and attracted, the lock bar 10 moves in the direction of the arrow A against the force of the spring 13, and the lock bar 10 separates from the hook 4 of the door hook 3. 2 can be opened and closed. When the door 2 is closed and the rotating body 15 starts rotating, the power of the electromagnetic solenoid 11 is cut off in response to the rotation signal, the lock bar 10 is moved in the direction opposite to the arrow A by the spring 13, and the hook portion 4 of the door hook 3 is moved. to go into. When the rotating body 15 stops, the stop signal is received and the electromagnetic solenoid 11 is attracted to open and close the door 2.

[0003]

In the conventional door lock mechanism, if the rotating body is damaged and a fragment directly hits the electromagnetic solenoid portion, the impact at the time of fragment collision is large, and the spring force cannot withstand it. There was a problem that the lock bar moved in the direction of arrow A by the reaction to be in the unlocked state.

It is an object of the present invention to provide a safe door lock mechanism in which the door lock is not released even if the broken pieces of the rotating body directly hit the electromagnetic solenoid.

[0005]

The above object is achieved by providing a locking action to the component itself which is directly hit by the fragments of the rotating body.

[0006]

The door lock mechanism constructed by the above method has an L-shaped lock on the side opposite to the lock bar 10 of the electromagnetic solenoid 11.
If a solenoid cover 14 in the shape of a box or a box is provided, and a broken piece of the rotating body 15 is directly hit, it first collides with the solenoid cover 14,
The force moves the solenoid cover 14 to prevent the lock bar 10 from moving due to an impact.

[0007]

Embodiments of the present invention will be described with reference to FIGS. The door hook 3 is fixed to the door 2, and the door 2
Can be opened and closed centering on a butterfly van 5 that connects the door 2 and the housing 1, and the door hook 3 opposes the hole 7 of the table 6. The opening / closing of the door 2 is separately detected using a switch or the like, and is not particularly shown. Door lock Kumi 8 is lock bar holder 9,
Electromagnetic solenoid 11, lock bar 10, spring 1
3, a pin 12, and a solenoid cover 14 are fixed to the table 6. The lock bar 10 is connected to the electromagnetic solenoid 11 by a pin 12 and is pushed by a spring 13 in the direction opposite to the arrow A. The lock bar 10 is inserted and held in the hole of the lock holder 9, and the electromagnetic solenoid 11 is fixed to the lock bar holder 9. Solenoid cover 14
Is attached to the electromagnetic solenoid 11 or the lock bar holder 9 so as to be movable in the same direction as the lock bar 10 with a spacer-containing screw or pin. The solenoid cover 14 is at a position opposed to the pin 12 connecting the lock cover 10 and the electromagnetic solenoid 11, and when the electromagnetic solenoid 11 is energized and sucked, it is pushed by the pin 12 and moves in the direction of arrow A. When the power is turned on, the stop of the rotating body 15 is detected, the electromagnetic solenoid 11 is turned on, and the lock bar 10 is moved to the arrow A
Is moved in the direction of and against the spring 13. When the rotating body 15 starts rotating, the rotation is detected and the electromagnetic solenoid 1
1 is cut off, and the lock bar 10 turns the spring 13
Thus, the door 2 is moved in the direction opposite to the arrow A, enters the hook portion 4 such as the hole of the door hook 3, and the door 2 is locked. Normally, the solenoid cover 14 is attracted by the energization of the electromagnetic solenoid 11,
It is pushed by the pin 12 and is in the position of FIG.

[0008]

If the door lock mechanism according to the present invention is adopted in a centrifuge, even if the rotating body is damaged and the fragments directly hit the electromagnetic solenoid of the door lock part, the door lock is released by the impact. Never.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall configuration of a centrifuge according to the present invention.

FIG. 2 is an enlarged sectional view of an essential part showing a door lock mechanism part according to the present invention.

FIG. 3 is a perspective view showing an embodiment of a solenoid cover according to the present invention.

FIG. 4 is a perspective view showing another embodiment of the solenoid cover according to the present invention.

FIG. 5 is an enlarged sectional view of an essential part showing a conventional door lock mechanism part.

[Description of Reference Signs] 1 is a housing, 2 is a door, 3 is a door hook, 10 is a lock bar, 11 is an electromagnetic solenoid, 13 is a spring, 14 is a solenoid cover, and 15 is a rotating body.

Claims (2)

[Claims] 1. A rotating body for containing a sample, a housing for containing the rotating body, a door provided on the housing, an electromagnetic solenoid for opening and closing the door, and a lock bar attached to the electromagnetic solenoid. And a door lock mechanism that locks the door by crossing the lock bar with a notch or the like of a door hook fixed to the door via a spring, on a side opposite to the lock bar. A centrifuge comprising a solenoid cover movable in the same direction as the lock bar. 2. The centrifuge, wherein the solenoid cover is formed in an L shape and a box shape and can cover a portion other than a mounting direction of the lock bar.