JP3142645B2 - Electric lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric lock for a door.

[0002]

2. Description of the Related Art A conventional technique will be described below with reference to FIGS. 3 and 4 (Japanese Utility Model Laid-Open No. 64-44988).

FIG. 3 is a front view of a conventional electric lock, in which 1 is an electric lock, 3 is a lock bar, 5 is a rotatable cam lever, and 6 is a fulcrum when the cam lever 5 rotates. 8 is a solenoid coil; 8a is a plunger provided inside the solenoid coil 8; 16 is an unlock limit switch for detecting locking / unlocking of the electric lock 1;
Reference numeral 30 denotes a door, 31 denotes a lock provided on the door 30, 32 denotes a lock hole provided in the lock 31, 31a denotes a first slot provided at one end of the cam lever 5, and 33b denotes a lock. , Provided in the plunger 8a, the first elongated hole 33a
A first pin 34a that can move inside the cam lever 5 is a second elongated hole provided at the other end of the cam lever 5, 34b.
Is a second pin provided on the lock bar 3 and movable within the second elongated hole 34a.

FIG. 4 is a sectional view taken along the line II in FIG.
Reference numeral 35 in FIG. 3 denotes a return spring serving as a force for rotating the cam lever 5 clockwise in FIG. 3 when the solenoid coil 8 is deenergized.

In the electric lock 1, the lock rod 3 is
2 is locked by being inserted into the lock hole 3.
2 and 3 are unlocked by exiting from FIG. 2 and FIGS. 3 and 4 show that the solenoid coil 8 is deenergized,
As described above, the spring force of the return spring 35 causes the cam lever 5 to rotate clockwise in FIG.
2 shows a state where the electric lock 1 is locked.

Next, the movement of the conventional electric lock 1 will be described with reference to FIGS.
This will be described with reference to FIG.

As shown in FIGS. 3 and 4, in order to unlock the electric lock 1 from the locked state, the solenoid coil 8 is urged to generate a force for attracting the plunger 8a to the solenoid coil 8 side. When the suction force exceeds the spring force of the return spring 35 shown in FIG. 4, the plunger 8a is sucked toward the solenoid coil 8, so that one end of the cam lever 5 is turned around the support shaft 6 in FIG. Rotating clockwise, the other end of the cam lever 5 also rotates counterclockwise about the support shaft 6.

When the other end of the cam lever 5 rotates, a second elongated hole 34a provided in the other end of the cam lever 5 is moved to a second pin 34b provided in the lock bar 3 as shown in FIG. , The lock bar 3 is raised, and the lock hole 3 is raised.
As the electric lock 1 is unlocked since the electric lock 1 is released from the door 30, the door 30 is unlocked.
Can move in the opening direction.

Incidentally, when the engaging element of the unlocking limit switch 16 for detecting that the lock rod 3 has come out of the lock hole 32 comes into contact with the upper end of the lock rod 3, the limit switch 16 is released. Generates an unlock signal to the control unit (not shown), so that it is detected that the electric lock 1 is unlocked.

When the electric lock 1 is changed from the unlocked state to the locked state, the door 30 is moved to the fully closed position, the solenoid coil 8 is deenergized, and the plunger 8a is moved toward the solenoid coil 8 side. Eliminate the suction power that was sucking,
Since the spring force of the return spring 35 acts, the cam lever 5 rotates clockwise about the support shaft 6 in FIG.

As a result, the plunger 8a returns to the original state shown in FIG. 3, and the lock rod 3 is inserted into the lock hole 32 provided in the lock piece 31, so that the electric lock 1 is locked. , The door 30 is locked.

[0012]

In the above-described conventional electric lock 1, the solenoid coil 8 is deenergized, and the return spring 35 is turned off.
The cam lever 5 is rotated clockwise about the support shaft 6 by the spring force of the lock lever 3, and the second long hole 34 a provided at the other end of the cam lever 5
When the lock 4 is pressed downward in FIG. 3, the lock bar 3 descends, so that the electric lock 1 is in the locked state, and the movement of the door 30 in the opening direction is restricted.

Therefore, for example, as shown in FIG. 5, a rotatable roller 37 is provided at the tip of the lock bar 3 of the electric lock 1, and a lock piece 31 having a concave portion 36 is provided in the door 30, so that the roller 3
7 is engaged with the recess 36 to lock / unlock the door 30.
In the case of unlocking, even if the solenoid coil 18 is deenergized and the electric lock 1 is kept in the locked state, the component force F ₂ generated by the force F ₁ when the door 30 is moved in the opening direction. in but against lock rod 3 electric lock 1 through the rollers 37, lock bar 3 and occurs in a direction to release the engagement with the recess 36, the component force F ₂ is more than the spring force of the spring 35 returns the above-mentioned If so, there is a problem that the electric lock 1 is unintentionally unlocked and the door 30 can move in the opening direction.

The present invention has been made to solve this problem. Even if an external force is applied to the lock bar 3 in a direction in which the lock bar 31 is disengaged from the lock piece 31, the lock rod 3 is unintentionally unlocked. The aim is to provide an electric lock without.

[0015]

In order to achieve the above object, an electric lock according to the present invention is provided with a cam lever rotatably provided on a main body via a support shaft, and a spring for applying a biasing force to the cam lever. One end of the cam lever is connected to a solenoid plunger, and the other end of the cam lever is connected to a lock bar provided in a direction orthogonal to the axial direction of the plunger, and provided on the lock bar and the door. In an electric lock for locking the door by engaging a lock piece, a first long hole is provided in the lock bar in the same direction as the axial direction of the plunger, and the lock rod is inclined with respect to the first long hole. A second long hole is provided in the cam lever, the first and second long holes pass through the first and second long holes, and the first and second long holes are movable by a guide pin. The lock pin is connected to the cam lever, and the guide pin is When the guide pin is located at one end of the slot, the guide pin is prevented from moving in the same direction as the axial direction of the lock bar. A guide plate is provided that allows the guide pin to move in the same direction as the axial direction of the lock bar when the guide pin moves to the other end of the first elongated hole by the slope.

[0016]

In the electric lock of the present invention described above, even if an external force greater than the urging force of the spring is applied to the lock bar from below to above, the lock can be removed.
Since the movement of the guide pin is restricted by the guide plate, the engagement between the lock bar and the lock piece is not released, and the electric lock is not unintentionally unlocked.

[0017]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of an electric lock according to an embodiment of the present invention, in which 2 is a guide plate, 4 is a guide pin, 7 is a winding spring, 9 is a reed switch, and 14 is a lock bar 3. Since the other components are the components shown in FIGS. 3 and 4, the same reference numerals are given to the same components.

FIG. 2 is a sectional view taken along the line of FIG. 1, wherein 10 is a guide groove formed in the guide plate 2, and 11a is a lock bar in the same direction as the axial direction of the plunger 8a. The first long hole 11b provided on the cam lever 5 is provided with a second long hole 11b provided on the cam lever 5 so as to be inclined with respect to the first long hole 11a.
, 12 is a leaf spring, 13 is a rubber seat for absorbing vibration and shock generated when the lock rod 3 descends, 15 is a monitor limit switch, and other components are shown in FIGS. 4, the same reference numerals are given to the same components.

The guide pin 4 penetrates the first and second long holes 11a and 11b and is provided so as to be movable in the first and second long holes 11a and 11b. The leaf spring 12 presses the guide pin 4 against the guide plate 2 in order to prevent the guide pin 4 from moving unintentionally due to vibration.

The operation of the electric lock of the present embodiment having the above configuration will be described with reference to FIGS.

In the electric lock 1 shown in FIGS. 1 and 2, the solenoid coil 8 is biased, the plunger 8a is attracted to the solenoid coil 8, and the cam lever 5 is moved to the position shown in FIG.
Since the guide pin 4 is rotated downward around the support shaft 6 and the guide pin 4 is pushed downward by the second elongated hole 11b, the lock bar 3 descends, and the lock provided on the lock bar 3 and the door 30 is provided. Since the electric lock 1 is in a locked state by the engagement with the piece 31, the door 30 cannot be moved in the opening direction.

To put the electric lock 1 in the unlocked state, first, a control unit (not shown) issues a signal to the solenoid coil 8 so as to deactivate it.

When the solenoid coil 8 is de-energized by the signal, the attraction force that has been attracting the plunger 8a is lost, and the plunger 8a moves to the cam lever 5 side in FIG. As a result, the cam lever 5 rotates clockwise around the support shaft 6, so that the guide pin 4 is guided to the other end of the first long hole 11a by the slope of the second long hole 11b.

When the guide pin 4 reaches the other end of the first elongated hole 11a, the guide pin 4 is guided by the guide groove 10 formed in the guide plate 2, and the cam lever 5 further rotates around the support shaft 6. As a result, the guide pin 4 is raised in FIG.

When the guide pin 4 is raised, the lock bar 3 engaged with the guide pin 4 is raised, so that the lock bar 3 and the lock piece 31 are disengaged, and the electric lock 1 is unlocked. The door 30 can move in the opening direction.

Since the lock plate 3 is raised by raising the lock bar 3, the engaging member 16a comes into contact with the key plate 14, and an unlock signal is transmitted from the unlock limit switch 16 to a control unit (not shown). Since it is emitted, it is detected that the electric lock 1 is unlocked.

Next, when the electric lock 1 is changed from the unlocked state to the locked state, after the door 30 is moved to the fully closed position, the solenoid coil 8 is urged, and the suction force larger than the urging force of the winding spring 7 is applied. A force is generated, and the plunger 8a
Is attracted to the solenoid coil 8 side.

When the plunger 8a attracts the solenoid coil 8, the cam lever 5 rotates counterclockwise about the support shaft 6 in FIG.
Is lowered along the side surface of the guide groove 10 by the slope of the second elongated hole 11b of the cam lever 5, and the guide pin 4 pushes the first elongated hole 11a provided in the lock bar 3 downward, whereby The lock rod 3 descends until it comes into contact with the rubber 13 and the door 3
The electric lock 1 is locked by engaging with the lock piece 31 provided on the “0”.

Then, the plunger 8a is further attracted to the solenoid coil 8, so that the cam lever 5 rotates counterclockwise, and the guide pin 4 is guided toward the solenoid coil 8 by the inclined surface of the second long hole 11b. , The state shown in FIG.

In this embodiment, since the monitor limit switch 15 is provided, the locking / unlocking state of the electric lock 1 can be monitored, for example, in a management room in a building. When the reed switch 9 provided inside the electric lock 1 obtains a magnetic field of a magnet (not shown) embedded in the lock piece 31 of the door 30, the reed switch 9 operates to obtain a magnetic field. If not, reed switch 9
Stops, so that the open / closed state of the door 30 can also be monitored.

As described above, according to the electric lock of this embodiment,
If the cam lever 5 is rotated clockwise about the support shaft 6 and the guide pin 4 is not moved to one end of the first elongated hole 11a, the guide plate 2 restricts the guide pin 4 from moving upward. Therefore, even if an external force acts on the lock bar 3 in a direction to remove the lock bar 3, the lock bar 3 does not rise,
The electric lock 1 is not unintentionally unlocked.

In the above embodiment, when the solenoid coil 8 is energized, the electric lock 1 is locked, but when the solenoid coil 8 is deenergized, the electric lock 1 is locked. In the case where a lock is used, the same effect as in the above embodiment can be obtained by changing the winding direction of the winding spring 7, and a lock hole is provided in the lock piece 31, and the lock rod 3 is inserted into the lock hole. Even when the electric lock 1 that is inserted and locked is used, the same effect as in the above embodiment can be obtained.

[0034]

As described above in detail, according to the electric lock of the present invention, by providing the guide plate, when the lock is in the locked state and the lock is below, the external force against the lock is higher. However, since the guide plate prevents the guide pin from rising upward and does not raise the lock bar, the electric lock is not unintentionally unlocked.

Further, the attraction force generated by urging the solenoid coil only needs to oppose the spring force of the spring that applies the urging force to the cam lever, so that the size of the solenoid coil can be reduced. There is.

[Brief description of the drawings]

FIG. 1 is a plan view of an electric lock according to an embodiment of the present invention.

FIG. 2 is a sectional view of the electric lock shown in FIG.

FIG. 3 is a front view of a conventional electric lock.

FIG. 4 is a sectional view taken along the line II of the electric lock in FIG. 3;

FIG. 5 is a diagram showing an attached state using a conventional electric lock.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric lock 2 Guide plate 3 Lock bar 4 Guide pin 5 Cam lever 6 Support shaft 7 Winding spring (spring) 8a Plunger 10 Guide groove 11a First long hole 11b Second long hole 30 Door 31 Lock piece

Claims (1)

(57) [Claims] 1. A cam lever is rotatably provided on a main body via a support shaft, and a spring for applying an urging force to the cam lever is provided.
One end of the cam lever is connected to a plunger of a solenoid, and the other end of the cam lever is connected to a lock bar provided in a direction perpendicular to the axial direction of the plunger. An electric lock that locks the door by engaging with a lock piece that is provided with a first long hole in the lock bar in the same direction as the axial direction of the plunger, and is inclined with respect to the first long hole. A second elongated hole is provided in the cam lever,
Penetrating the first slot and the second slot, the first slot and the second slot;
The lock bar and the cam lever are connected by a guide pin that can move in the long hole. When the guide pin is at one end of the first long hole, the guide pin is Regulates movement in the same direction as the axial direction,
When the guide pin is moved to the other end of the first elongated hole by the inclined surface of the second elongated hole by rotating the cam lever, the guide pin moves in the same direction as the axial direction of the lock bar. An electric lock having a guide plate that allows movement.