JPH0712539Y2 - Automatic door unlocking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an unlocking device for unlocking an automatic door.

[Conventional technology]

An automatic door used in a store, a safe, or the like is designed to be locked when the door is closed for safety, and is unlocked each time the door is opened.

FIG. 3 shows such a locked state, in which the engagement hole b of the locking plate B (engaged member) attached to the door A is
The lock bar d (engagement member) of the electric lock D attached to the frame wall or the like is inserted to prevent the door A from opening.

When the electric lock D is energized, the locking rod d is pulled out from the engagement hole b by the electromagnetic force, so that the door A can be opened.

[Problems to be Solved by the Invention] When the door A is forcibly opened in the locked state as shown in FIG. 3, only the clearance between the engagement hole b and the locking rod d as shown in FIG. Door A opens. Then, the locking plate B and the locking rod d come into contact with each other.

However, if the locking plate B and the locking rod d are in strong contact with each other, due to the frictional force, even if the electric lock D is energized, the locking rod d cannot be moved by the electromagnetic force. However, there is a problem that the lock cannot be released.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic door unlocking device capable of reliably releasing the lock even when the engaging member is not moved by the electromagnetic force as described above.

[Means for solving problems]

The automatic door unlocking device of the present invention locks the door by loosely fitting the engaging member to the engaged member in a state where the door is closed with respect to the frame wall and the like, and drives the actuator to lock the door. In an unlocking device for an automatic door that unlocks a lock by electromagnetically moving the engaging member when opening, when opening the door in the locked state, prior to the opening operation. Monitoring means for monitoring whether or not the engaging member is disengaged from the engaged member within a predetermined time period, and confirmation of disengagement of the engaging member from the engaged member within a predetermined time period by the monitoring means. If not, a closing operation control means is provided to reversely drive the actuator to close the door.

[Action]

The automatic door unlocking device of the present invention can temporarily close the door when the engaging member is not disengaged from the engaged member during unlocking.

Therefore, even when the engaging member is in strong contact with the engaged member provided on the door or the frame wall, the door moves in the closing direction to regain the clearance, and therefore the engaging member is moved by the electromagnetic force. Return to the state where you can

Therefore, it is possible to reliably unlock.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the drawings. Here, FIG. 1 is a conceptual diagram of the structure of an automatic door including an unlocking device according to an embodiment of the present invention, FIG. 2 is a flowchart of the operation of the unlocking device according to the present invention, and FIG. FIG. 6 is a front view showing a configuration example, and FIG. 6 is a side view of the same. The present invention is not limited to the embodiments shown in the drawings.

The automatic door 1 shown in FIG. 1 drives the motor 4 (actuator) and the belt 3 when the person detection sensor 5 detects a passerby, opens the door 2, and when the person is no longer detected, the motor 4 and the belt 3. 3 is inverted and the door 2 is closed. Such control is performed by the control circuit 6.

In the state where the door 2 is closed, the locking plate 7 (engaged member) attached to the door 2 is fitted into the engaging hole 7a of the electric lock 9 attached to the frame wall or the like (the engaging member 8). ) Is inserted (played loosely) and locked so that the door 2 cannot be opened.

When the door 2 is opened, the control opening 6 energizes the electric lock 9, and the locking rod 8 is pulled out from the engagement hole 7a by the electromagnetic force to release the lock.

The limit switch 10 checks whether or not the locking rod 8 is pulled out.

The control circuit 6 has a microcomputer as a center, and functions as an unlocking device when the door 2 is opened. Second
The figure shows the operation of the unlocking device.

That is, when a passerby is detected by the human detection sensor 5 (S
1) Output a signal to release the electric lock 9 (S
2).

As a result, the electric lock 9 generates an electromagnetic force so as to pull out the locking rod 8.

The control circuit 6 checks with the limit switch 10 whether the locking rod 8 has been pulled out (S3), and if it has been pulled out, it shifts to the "door opening process".

However, when it is not possible to confirm that the locking rod 8 is pulled out even after a predetermined time (for example, 0.2 seconds) has passed (S4), the motor 4 and the belt 3 are driven to operate the door 2 in the closing direction (S5). ).

In this operation step (S3, S4), when the door 2 in the locked state is opened, it is determined whether or not the locking rod 8 is disengaged from the locking plate 7 within a predetermined time prior to the opening operation. Corresponding to monitoring means for monitoring, in the operation step (S5), when the monitoring means does not confirm that the locking rod 8 is detached from the locking plate 7 within a predetermined time, the motor 4 is driven in reverse. And corresponds to a closing operation control means for closing the door 2.

Then, it is checked again with the limit switch 10 whether or not the locking rod 8 has been pulled out (S6), and if it has been pulled out, the "door opening process" is entered.

However, if it cannot be confirmed that the locking rod 8 has been pulled out even after 15 seconds have passed (S7), it is determined that an error that cannot be unlocked has occurred, and the process proceeds to "error processing".

According to the above operation, the door 2 is forced to move and the locking plate 7
Even when the locking rod 8 and the locking rod 8 are in strong contact with each other and the locking rod 8 cannot be pulled out by the electromagnetic force, the clearance is restored because the door 2 is temporarily closed, and the locking rod 8 is locked by the electromagnetic force. Can be pulled out. Therefore, the unlocking can be surely performed unless there is another cause of the error.

FIG. 5 and FIG. 6 show a specific configuration example of the electric lock 9.

The locking rod 8 is connected to one end of the L link 11, and the L link
A return spring 12 applies an urging force to rotate 11 so as to move the locking rod 8 downward.

The other end of the L link 11 is connected to a plunger 13, and the plunger 13 is attracted by a solenoid 14.

Therefore, when the solenoid 14 is not energized, the locking rod 8 projects downward and is inserted into the engaging hole 7a of the locking plate 7 to be locked.

When the solenoid 14 is energized, the plunger 13 is attracted and the L-link 11 rotates against the biasing force of the return spring 12,
Pull up the locking rod 8. Then, the lock is released.

A lever (not shown) is attached to the support shaft 15 and the working shaft 16 protruding from the L-link 11 so that the working shaft 16 can be manually rotated about the support shaft 15 to move the L-link 11. It is possible to manually move the locking rod 8 up and down.

[Effect of device]

According to the present invention, when the door is closed with respect to the frame wall, the engaging member is loosely fitted to the engaged member to lock the door, and the actuator is driven to open the door. In an automatic door unlocking device that electromagnetically moves a member to release it from the engaged member and unlocks the door, when the door in the locked state is opened, the door is opened within a predetermined time prior to the opening operation. Monitoring means for monitoring whether the engaging member is disengaged from the engaged member, and when the disengagement of the engaging member from the engaged member is not confirmed within a predetermined time by the monitoring means, An unlocking device for an automatic door is provided, comprising: a closing operation control means for driving the actuator in a reverse direction to close the door, whereby an engaging member and an engaged member are operated by a closing operation. To recover clearance between and smoothly Since it is possible to move by a magnetic force, so that can be reliably performed unlocking.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of the structure of an automatic door including an unlocking device according to an embodiment of the present invention, FIG. 2 is a flowchart of the operation of the unlocking device according to the present invention, and FIG. 3 is a description of the locked state of the automatic door. 4 is a conceptual view showing a state in which the door is forcibly moved in the opening direction in a locked state, FIG. 5 is a front view showing a specific configuration example of the electric lock, and FIG. 6 is a side view thereof. Is. [Description of symbols] 1 ... Automatic door, 2 ... Door 3 ... Belt, 4 ... Motor (actuator) 5 ... Person detection sensor, 6 ... Control circuit 7 ... Locking plate (engaged member) ), 7a ... Engagement hole 8 ... Locking rod (engagement member), 9 ... Electric lock 10 ... Limit switch.

Claims (1)

[Scope of utility model registration request] 1. An engaging member is loosely fitted to an engaged member in a state where the door is closed with respect to a frame wall to lock the door, and the actuator is driven to open the door. In an automatic door unlocking device for electromagnetically moving a door to disengage it from the engaged member and unlocking the door, when the door in the locked state is opened, the lock is released within a predetermined time prior to the opening operation. Monitoring means for monitoring whether or not the coupling member is disengaged from the engaged member; and when the disengagement of the engaging member from the engaged member is not confirmed by the monitoring means within a predetermined time, An unlocking device for an automatic door, comprising: a closing operation control means for driving the actuator in reverse to close the door.