JPH0468432B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a locking device suitable for use, for example, in locking the lid of a centrifuge or the like.

Since the rotor of a centrifuge rotates at high speed, it is extremely dangerous if the lid opens easily.

One object of the present invention is to provide a lid locking device that locks when the lid is closed and prevents the lid from being opened unless the lock is released.

Another object of the present invention is to provide a lid locking device in which the rotor does not rotate unless the lid is closed and locked, and the rotor stops rotating when the lid is opened.

Yet another object of the present invention is to provide a lid locking device that prevents the rotor from rotating unless the lid is closed and locked, and prevents the lid from opening unless the rotor stops rotating. .

One embodiment of the present invention will be described in detail below based on an embodiment shown in the drawings. In FIGS. It is the body of the aircraft,
This body 1 is provided with a lid 16 by means not shown.
is attached so that it can be opened and closed freely. Inside the top plate 1b at the upper front of this aircraft 1, there is a base plate 2.
is fixed to the wall, and an actuation plate 3 is slidably attached to the base plate 2 by support pins 4, 4, 4, 4. The actuating plate 3 is urged to move in one direction by a tension coil spring 5 stretched between it and the base plate 2, and an operating push button 6 is fixed to one end of the actuating plate 3. , this operation push button 6 penetrates through the side plate 7 and a part thereof protrudes to the outside of one side of the body 1.

On both sides of the base plate 2, short locking plates 8, 8 and long locking plates 9, 9 are pivotally supported by support shafts 10, 10 in a cross shape.
At the tip of 9, 9 are locking pins 11, 11, 12,
12 is fixed, and a portion thereof is fitted into elongated holes 13, 13 and 14, 14 provided in the base plate 2. From both sides of the actuating plate 3 are actuating pins 18,
18, 19, 19 are provided protrudingly, and this operating pin 1
8, 18, 19, 19 pass through the elongated holes 20, 20, 21, 21 provided in the base plate 2 and extend beyond the fulcrum of the locking plates 8, 8 and the fulcrum of the locking plates 9, 9. It is facing the one end that has crossed. and,
The locking plates 8, 8, 9, 9 are biased in the closing direction by tension coil springs 15, 15.
The locking pins 11, 11, 12, 12 are protruding from the lid 16, and are inserted into the notches 17a, 1 of the engaging claws 17, 17 through the insertion holes 1a, 1a of the top plate 1b.
7a, 17a, and 17a.

The base plate 2 further includes respective engaging claws 1.
7, 17, switch control pieces 22, 22 are supported by support shafts 23, 23, and at the free ends of these switch control pieces 22, 22, approximately the center of the switch pressing members 24, 24 is provided. The part is the pin 24a, 2
4a, and these pins 24a, 24a
Cam parts 9a, 9a provided on the edges of the locking plates 9, 9
It is in contact with the Switch pressing members 24, 24
The pressure receiving pins 25, 25 provided on the free end side are brought into contact with one side of the tips of the engaging claws 17, 17, and the switch pressing portions 24b, 24b provided on the other free end side are also fixed to the base plate 2. , contacts 26a, 26a of micro switches 26, 26 inserted in series in a rotor starting circuit (not shown) are pressed.

A locking hole 3a is provided at the left end of the actuating plate 3. A solenoid 27 is provided opposite the locking hole 3a, and the tip of a plunger 28 of the solenoid 27 faces the locking hole 3a. are doing. An interlocking member 29 is hung downward from the plunger 28, and the base plate 2 has a hole 30 for letting the tip of the plunger 28 escape.
An insertion hole 31 used when pressing the interlocking member 29 from the outside is provided, and another insertion hole 32a is provided in the front plate 32 of the body opposite to the insertion hole 31.

Note that this solenoid 27 is not excited when the rotor is rotating, and the tip of the plunger 28 is inserted into the locking hole 3a of the actuating plate 3 to prevent its sliding, so that the rotor does not rotate. When the rotor stops, or in some cases, when the main switch of the rotor (not shown) is turned off, it is energized.
The tip of the plunger 28 is inserted into the locking hole 3a of the actuating plate 3.
It is configured to be more evacuated. The solenoid 27 is turned on, for example, by an electromagnetic switch inserted into the rotor's starting circuit.
It may be turned OFF, or it may be turned ON or OFF by a sensor that detects the rotation start/stop of the rotor or drive motor.

Therefore, especially as shown in FIG.
6 is closed, the engaging claws 17, 17 engage the locking pins 11, 11, 1 of the locking plates 8, 8, 9, 9.
2 and 12, and is locked, and even if the lid 16 is opened, it cannot be opened. At the same time, the switch pressing portion 24 of the switch pressing members 24, 24
b, 24b are contacts 26a, 26a of micro switches 26, 26 inserted in the rotor starting circuit
Press to turn it on. Therefore, when the main switch (not shown) inserted into the rotor starting circuit is turned ON, the rotor starts rotating at high speed, and at the same time, the starting circuit switch of the solenoid 27 is turned OFF, and the plunger 28 is turned OFF.
is projected by the elastic force of the compression coil spring 33, and its tip engages with the locking hole 3a of the actuating plate 3, thereby locking it.

Therefore, in this state, even if the operating push button 6 is pressed with a fingertip, the operating plate 3 does not move because the locking hole 3a engages with the plunger 28 of the solenoid 27 and is locked, and the lid 16 cannot be opened. There is no.

When the main switch (not shown) is turned OFF to stop the rotation of the rotor, the solenoid 27 is energized and the plunger 28 is sucked in against the elasticity of the compression coil spring 33, so that the plunger 28 is locked against the actuating plate 3. It will be canceled. Therefore, if you press the operation push button 6 with your fingertip,
In both cases, the actuating plate 3 slides to the left in the figure, and the actuating pin 1
8, 18 push the locking plates 8, 8 counterclockwise, and the other pair of operating pins 19, 19 push the locking plates 9, 9 clockwise, so the locking plates 8, 8, 9, 9 are pulled. The engaging claws 1 of the locking pins 11, 11 and 12, 12 open against the pulling force of the coil springs 15, 15.
7 and 17 are released. At the same time, the pins 24a, 24a are pushed upward by the cam portions 9a, 9a of the locking plates 9, 9, which rotate clockwise.
The pins 24a, 24a are the switch pressing members 24,
The switch pressing portions 24b, 24b of the switch pressing members 24, 24 slide in the elongated holes 2a, 2a and move upward against the pressing force of the torsion coil springs 34, 34, and the switch pressing portions 24b, 24b of the switch pressing members 24, 24 press the micro switches 26, 2.
6, away from the contacts 26a, 26a, and connect them.
Turn it off. At this time, the switch pressing member 24,
24 is urged to rotate clockwise by torsion coil springs 34, 34, so that the locking pins 11, 11, 12, 1 of the locking plates 8, 8, 9, 9
2 is the notch part 17a, 17a of the engaging claw 17, 17...
...and at the same time the engaging claws 17, 17 are pushed up by the pressure receiving pins 25, 25 to prevent re-engagement.

Even if you release your finger from the operation push button 6, this state is maintained because the switch pressing members 24, 24 are similarly biased clockwise by the torsion coil springs 34, 34, and the lid is slightly opened. 16 will not automatically close and reengage.

When you release your finger from the operation push button 6, the actuating plate 3 moves to the right due to the traction force of the tension coil spring 5 and returns to its original position. Close and return to original position. And the switch pressing member 24,
24, the pins 24a, 24a are guided by the cam portions 9a, 9a of the locking plates 9, 9 and move downward within the elongated holes 2a, 2a, but at this time the engaging claws 17, 17 are moved as shown in FIG. Since the switch pressing members 24, 24 are allowed to rotate clockwise by that amount, this rotation maintains the non-contact state with respect to the contacts 26a, 26a.

In this way, when the main switch (not shown) is turned OFF or the rotor rotation stops, the second electric lock by the solenoid 27 is released, and the lid 16 can then be operated. When the first mechanical lock is released by the actuating plate 3, the door can be opened freely. Even if you accidentally turn on the main switch while it is open, the micro switch 2
Since 6 and 26 are turned off, the rotor will not rotate.

When this lid 16 is closed again, the engaging claws 17, 17
are inserted into the body through the insertion holes 1a, 1a, and when pushed down further, the engaging claws 17,
17 is inserted between the locking pins 11, 11, 12, 12 protruding from the locking plates 8, 8, 9, 9, and opened against the pulling force of the tension coil springs 15, 15. Locking pin 11, 11・12, 12
are the notches 17a, 17a of the engaging claws 17, 17...
It is locked by engaging with. At the same time, the tips of the engaging claws 17, 17 are connected to the switch pressing member 24,
Since the pressure receiving pins 25, 25 of 24 are pressed down, the switch pressing members 24, 24 rotate counterclockwise as shown in FIG. Press the contacts 26a, 26a of the micro switches 26, 26 to turn them on. Therefore, if the main switch is turned on in advance, the rotor starts rotating immediately, and if not, the rotor starts rotating when the main switch is turned on. At the same time, as described above, the solenoid 27 is turned off, and the tip of the plunger 28 fits into the locking hole 3a of the actuating plate 3 to lock it.

In the above embodiment, if an internal failure occurs while the rotor continues to be energized, the solenoid 27 will not be energized, so the lid 1
6 ends up not opening. Therefore, in such a case, for example, a screwdriver or the like is inserted from outside the centrifuge through the insertion hole 32a provided in the front plate 32 and through another insertion hole 31 provided in the base plate 2. When pressed, the plunger 28 releases the compression coil spring 3.
The actuating plate 3 moves backward against the elastic force of the actuating plate 3 and releases the lock from the locking hole 3a, so that the actuating plate 3 can slide.
The mechanical lock is released and the lid 16 can be opened.

FIG. 5 was devised specifically to achieve the object of item 1 of this invention, and since a micro switch is not used, the locking plate, which had a fan shape in the previous embodiment, is replaced with a straight line. It is made into a shape and its shape is different.

According to the drawing, when the operation push button 6 is pressed to move the actuating plate 3 to the left from the closed state of the lid shown in FIG.
5, 36, 36 are opened, and the locking pins 37, 37, 36 are opened.
38, 38 are disengaged from the engaging claws 17, 17, and the lid 16 can be opened. When the opened lid 16 is closed, the engaging claws 17, 17 engage the locking pin 3.
7, 37, 38, 38, and after pushing it open left and right, the notches 17a, 17a are locked by the locking pins 37, 37, 38, 38, and the lid 16 is locked. Complete. Incidentally, since the structure of this embodiment is simple, it is not necessarily limited to those for use in centrifuges.

The means for achieving the second object of the present invention is to remove the solenoid 27 and the corresponding parts from those shown in FIGS. 1 to 4, and in this case, The actuation plate 3 can be operated via the operation push button 6 even while the rotor is rotating, and the rotor can be driven when the lid 16 is closed, and cannot be driven or stopped when the lid 16 is opened.

The means for achieving the third object of the present invention includes the solenoid 27 portion and a corresponding portion of the embodiment shown in FIGS. 1 to 4, and in this case, The effects have been described above.

In either embodiment, the engaging claw 1 provided on the lid 16
It is possible to combine 7 and 17 into one lock device, and in the claims of the present invention, "at least one" is used.
The reason for this is to emphasize the meaning.

As explained in detail above, the present invention has a rotor that rotates at high speed, and in particular, it is possible to prevent the lid of a centrifuge from being easily opened, and to stop the rotor when the lid is opened. In addition, the lid can be prevented from opening unless the rotor is stopped, so if these are applied to a centrifuge as necessary, the safety of the centrifuge can be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a plan view thereof, FIG. 2 is a front view of the same in a locked state, FIG. 3 is a front view of the same in an unlocked state, and FIG.
The figure is a partial front view showing the state of the microswitch after the lock is released and before the lid is opened, and FIG. 5 is a front view showing an embodiment for achieving the first object of the present invention. 1... Body, 1a... Insertion hole, 2... Base plate, 3... Operating plate, 6... Operation push button, 8,
8,9,9...locking plate, 9a...cam part, 11,
12... Locking pin, 16... Lid, 17, 17...
Engagement claw, 18, 19... operating pin, 22... switch control piece, 24, 24... switch pressing member,
26, 26... Micro switch, 27... Solenoid, 35, 35, 36, 36... Locking plate.

Claims (1)

[Claims] 1. A fuselage, a lid attached to the fuselage so as to be openable and closable, a pair of engaging claws each having a constricted portion protruding from the lid at a predetermined interval, a pair of insertion holes for allowing insertion and removal of each of the engaging claws provided therein, a base plate provided inside the body, and a pair of insertion holes provided on opposite sides that are pivotally mounted to the base plate so as to be able to swing about the same axis. a pair of locking plates each having a locking pin that locks the constricted portions of the pair of engaging claws when energized; an actuating plate that is pivotally supported so as to be slidable in a direction perpendicular to each of the locking plates, and an opposing point protruding from the actuating plate that extends beyond the fulcrum of each of the pair of locking plates to open the locking plate. It is comprised of a pair of actuation pins provided corresponding to each pair of locking plates for releasing the locking of the locking pin from the engagement pawl, and an operation push button protruding from the actuation plate to the outside of the machine body. A lid locking device characterized by: 2 A machine that is equipped with something that rotates at high speed such as a rotor inside, a lid that is attached to the machine so that it can be opened and closed, and a constriction that protrudes from the lid at a predetermined interval. a pair of engaging claws;
a pair of insertion holes provided in the body for allowing insertion and removal of each of the engaging claws; a base plate provided inside the body; and a pair of mutually opposing holes each pivotably mounted on the base plate on the same axis. each pair of locking plates configured to lock the constricted portions of the pair of engaging pawls that are energized toward the locking side;
When this mating locking plate is reached, the base plate is biased in one direction and is slidably supported, and the opposing points beyond the fulcrums of each pair of locking plates are pushed to open and lock against the engaging pawl. an actuating plate that releases the actuating plate; an operating push button that protrudes from the actuating plate to the outside of the aircraft body; and an operating push button that is rotatably biased in one direction and is pivotally supported by the base plate and acts on a partner of the engaging pawl and the locking plate. A lid locking device comprising a switch pressing member and a switch for the rotor that is opened and closed via the switch pressing member depending on the relative positional relationship between the engaging pawl and the locking plate. 3. The switch pressing member is pivotally supported at a substantially central portion thereof by a switch control piece rotatably pivoted to the base plate while being further urged to rotate in one direction, and is provided on one of the locking plates. 3. The lid locking device according to claim 2, wherein the ON/OFF operation of the rotor with respect to the switch is also controlled by a cam portion. 4 It has a body equipped with something that rotates at high speed such as a rotor inside, a lid attached to the body so that it can be opened and closed, and a constriction that protrudes from the lid at a predetermined interval. a pair of engaging claws;
an insertion hole provided in the body for allowing insertion and removal of the engaging pawl; a base plate provided inside the body; and attachments on opposing sides that are pivotally attached to the base plate so as to be pivotable about the same axis. Each pair of locking plates are structured to lock the constricted portions of the pair of engaging claws when the pair of locking plates are biased, and the locking plate reaches the partner locking plate and slides while being biased in one direction by the base plate. an actuating plate that is pivotably supported and that opens and releases the engagement with the engagement claw by pushing opposing points beyond the fulcrums of each pair of locking plates; and an operation push button that protrudes from the actuating plate to the outside of the machine body. a switch pressing member that is rotatably biased in one direction, is pivotally supported by the base plate, and acts on a partner of the engaging claw and the locking plate;
Due to the relative positional relationship between the engaging claw and the locking plate, the switch of the rotor is opened and closed via the switch pressing member, and the sliding of the actuating plate by the operation push button is prevented in response to the stoppage of rotation of the rotor. , or a solenoid for releasing the lid. 5. The switch pressing member is pivotally supported at its substantially central portion by a switch control piece rotatably pivoted to the base plate while being further urged to rotate in one direction, and is provided on one of the locking plates. 5. The lid locking device according to claim 4, wherein the ON/OFF operation of the rotor with respect to the switch is also controlled by a cam portion.