JP2002138722A - Control method of electric lock and device therefor and automatic door device having electric lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control method of an electric lock, a device therefor and an automatic door device having the electric lock capable of largely reducing an operation sound. SOLUTION: In this electric lock for engaging and disengaging a lock body connected to a plunger via a mechanical mechanism to a door by advancing and retreating the plunger against energizing force of a spring or by restoring force of the spring by exciting a solenoid or releasing excitation, when engaging and disengaging the lock body, voltage is gradually increased up to operating voltage capable of surely operating the solenoid at exciting time, and when releasing the excitation in a solenoid operating state, impression of the voltage is gradually reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric lock control method and apparatus suitable for an automatic door and an automatic door apparatus provided with the electric lock.

[0002]

2. Description of the Related Art Conventionally, an automatic door is opened when a person enters a detection range of a sensor and closed when a person who passes through the door goes out of the detection range. Also,
Electric locks may be provided to prevent closed doors from being opened by hand.

As the above-mentioned electric lock, for example, Japanese Patent Publication No. 7-21777
Japanese Patent Application Laid-Open Publication No. H10-203,041, is known, and the configuration is shown in FIG.

[0004] The electric lock shown in FIG. 1 is of the electro-conductive lock type, and energizes a solenoid 60 to retract a shaft pin 62 against the urging force of a compression coil spring 61, or cancels the excitation to release a compression. The return force of the coil spring 61 causes the shaft pin 62
Is advanced, the lock pin 64 moves up or down via a link mechanism 63 provided at the tip of the shaft pin 62, and the lock hole 66 a of the lock plate 66 extended from the upper end of the opening / closing door 65. The lock pin 64 can be inserted into and removed from the lock.

[0005] Since it is desired that the opening and closing operation of the automatic door is agile, the electric lock is designed so that the lock pin 64 is quickly raised prior to opening of the opening and closing door.

[0006]

However, in the above-described configuration of the electric lock, a metallic operation noise is generated every time the electric lock is operated. In particular, in an apartment house such as an apartment, the above-mentioned metal sound is easily transmitted to a room near the automatic door device, and it is desired to reduce the operation sound. The cause of this noise is that when the power is transmitted to the lock pin 64 via the link mechanism 63, the guide pin 63a and the guide groove 63b, which are engaged with play, collide violently. It is estimated.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems in the conventional automatic door device, and has an electric lock control method and an electric lock device capable of greatly reducing operating noise, and an electric lock device. To provide an automatic door device.

[0008]

According to a control method of an electric lock of the present invention, a solenoid is excited or de-energized to advance or retract a plunger against a biasing force of a spring or by a return force of a spring. In an electric lock for engaging and disengaging a lock body connected to a door through a mechanical mechanism, when the lock body is engaged and disengaged, the voltage is gradually increased to an operating voltage at which a solenoid can be reliably operated at the time of excitation. The point is that when the excitation is released in the solenoid operating state, the voltage application is gradually reduced.

In the above control method, it is preferable that, when a voltage is applied to the solenoid, the voltage is raised to a predetermined voltage lower than the operating voltage, and then the voltage is gradually increased starting from the predetermined voltage.

In the above control method, after the solenoid operates, the applied voltage is maintained at a holding voltage lower than the solenoid operating voltage, and the voltage application can be gradually reduced starting from the holding voltage.

In the above control method, it is preferable that the predetermined voltage is set to a value at which the plunger can start moving at least against the urging force of the spring.

The electric lock device of the present invention energizes or de-energizes the solenoid to advance or retract the plunger against the urging force of the spring or by the return force of the spring, and is connected to the plunger via a mechanical mechanism. In an electric lock that locks and unlocks a locked body with respect to a door, the voltage is gradually increased to an operating voltage at which the solenoid can be reliably operated at the time of excitation, and the voltage is gradually applied when the excitation is released in the solenoid operating state. The gist of the present invention is to provide a voltage control means for reducing the voltage.

The automatic door device of the present invention has an opening / closing door, driving means for opening / closing the opening / closing door, and an electric lock for locking the door when the opening / closing door is closed. By energizing or de-energizing the solenoid, the plunger moves forward and backward against the urging force of the spring or by the return force of the spring, a lock body connected to the plunger via a mechanical mechanism, and the solenoid at the time of excitation The gist is to provide a voltage control means for gradually increasing the voltage to an operation voltage at which the operation can be reliably performed, and for gradually reducing the application of the voltage when the excitation is released in the solenoid operating state.

According to the control method of the electric lock, since the plunger of the solenoid does not operate suddenly when the voltage is applied, the operation sound of the electric lock can be greatly reduced.

Further, when a predetermined voltage is previously raised when applying a voltage to the solenoid, the operation time of the lock body can be shortened, and the engagement / disengagement operation can be accelerated.

Further, if the application of the voltage is gradually reduced starting from the holding voltage after the solenoid is operated, the operation noise can be further reduced.

According to the above electric lock device, the operating noise of the electric lock can be greatly reduced, and the reliability of the electric lock device can be enhanced because the shock at the time of operation is small.

According to the automatic door device, since the operating noise of the electric lock is reduced, the quietness at the time of locking and unlocking can be improved.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

FIG. 1 shows an automatic door device to which the electric lock of the present invention is attached.

In FIG. 1, an automatic door device 1 has an openable / closable door 2 which is suspended from a cylindrical header box 3.

More specifically, a pair of door hangers 2a, 2b are provided upright from both sides of the upper frame of the opening / closing door 2, and a door wheel 2c pivotally supported at the upper end of each of the door hangers 2a, 2b is a header box 3c. It rolls on the running rail 4 inside.

In parallel with and above the traveling rail 4, a timing belt 5c stretched around a driving sprocket 5a and a driven sprocket 5b and circulating between the two sprockets.
Are arranged, and the door hangers 2a and 2b are fixed to a timing belt 5c running on the lower side.

Accordingly, when the drive engine sprocket 5a is rotated in the forward or reverse direction by the door engine 5d, the timing belt 5c moves in the direction of arrow A or B, and the door hanger 2 fixed to the timing belt 5c.
The opening / closing door 2 is opened and closed via a and 2b. The driving operation of the door engine 5d is controlled by a door engine controller 5e housed in the header box 3.

The upper frame of the opening / closing door 2 has a bracket 6
A lock receiving portion 7 is provided through the opening. When the opening / closing door 2 is closed, the lock receiving portion 7 corresponds to the dead bolt (lock body) 8a of the electric lock 8 provided in the header box 3. Has become. The electric lock 8 is controlled by an electric lock controller 9. In the figure, reference numeral 10 denotes a fixed panel.

FIGS. 2A and 2B are enlarged front views of the electric lock 8, wherein FIG. 2A shows an operation state when power is not supplied, and FIG. 2B shows an operation state when power is supplied.

The electric lock 8 is of an energized locking type suitable for, for example, an automatic lock door, and locks when a dead bolt is lowered when energized.

In FIG. 1A, a solenoid 21 is housed in a cylindrical box-shaped case 20 of the electric lock 8, and a plunger 21b is inserted into a central shaft of the electromagnetic coil 21a. A triangular link plate 22 as a mechanical mechanism is connected to the tip 21c of the plunger 21b.

The link plate 22 swings up and down around a pivot 22a.
A connecting pin 22b protruding from a tip 21c of the plunger 21b at a connecting point disposed below the pivot 22a.
Are connected. On the other hand, a hook-shaped guide groove 22c is formed at the tip of the link plate 22, and a pin 23a protruding from the rear end of the dead bolt 23 is engaged with the guide groove 22c.

A coil spring 24 is mounted on the pivot 22a, and one end of the coil spring 24 is
It is locked on a support shaft 20a protruding from zero, and the other end is hung on the connection pin 22b.

Reference numeral 25 denotes a stopper for regulating the lower swing limit of the link plate 22. Reference numeral 26 denotes a limit switch for detecting the rise of the dead bolt 23, that is, the unlocking completion. When the plate 27 to which the tip of the link plate 22 can come into contact pushes down the actuator 26a, an unlocking completion signal is output. It has become. This unlocking completion signal is given to the door engine controller 5e, and is used as a trigger when the opening / closing door 2 is opened.

Next, the operation of the electric lock having the above configuration will be described with reference to FIG.

When a voltage is applied to the solenoid 21 to excite the electromagnetic coil 21a, the plunger 21b retreats in the direction of arrow C against the urging force of the coil spring 24 due to the magnetic attraction, and the link plate 22 is moved to the pivot 22a. Is rotated in the direction of arrow D around the center of rotation, and the pin 23a engaged with the guide groove 22c is pulled down. Thereby, the dead bolt 23 protrudes from the lower surface of the case 20 and engages with the lock receiving portion 7 described above. When the rotating link plate 22 comes into contact with the stopper 25, the lowering of the dead bolt 23 stops, and the dead bolt 23 is held in this state.

The voltage applied to the solenoid 21 is controlled by the electric lock controller 9. The control operation will be described with reference to a time chart of FIG.

FIG. 3A shows a conventional voltage application pattern shown as a comparative example, and FIG. 3B shows a voltage application pattern according to the present embodiment. Note that, in FIG.
Is a voltage (operating voltage) necessary for reliably operating the solenoid 21, and the holding voltage is a voltage necessary for maintaining the magnetic attraction force after the solenoid is operated, and is a voltage lower than the operating voltage (this embodiment). It is set to 35 V in the embodiment.

First, in the conventional voltage application pattern, when an unlocking signal is given from the electric lock controller 9, the holding voltage sharply falls to 0V. Therefore, the plunger 21b does not act on the electromagnetic attraction force, but instantaneously projects due to the return force of the coil spring 24. When the link plate 22 jumps up, the pin 23a cannot trace the hook-like shape of the guide groove 22c at a high speed. It collides with the edge of 22c and generates noise.

On the other hand, when a lock signal is given, the voltage is sharply raised to 90V. Also in this case, noise is generated for the same reason as described above. The reason why the voltage is lowered to the holding voltage after 0.5 sec is to prevent the seizure of the solenoid 21.

On the other hand, in the present embodiment, FIG.
As shown in (1), when the unlock signal is given, the voltage is gradually lowered from the holding voltage so that the voltage falls with a gradient. Specifically, 35 for a period of 0.25 sec.
V is reduced to 0V.

On the other hand, when the locking signal is given, the voltage is raised to a predetermined voltage (45 V in this embodiment), and then the voltage is raised with a gradient starting from the predetermined voltage. Specifically, the voltage is increased from a predetermined voltage to 90 V in a period of 1.5 seconds. The voltage control is performed by the electric lock controller 9, for example, a solenoid 21.
A predetermined gradient can be obtained by controlling the duty ratio of the voltage applied to the.

The reason why the predetermined voltage is raised before applying the voltage to the solenoid 21 is to shorten the operation time of the deadbolt 23 to speed up the engagement / disengagement operation. This predetermined voltage is preferably set to a value at which the plunger can start moving against the urging force of the coil spring 24 and the frictional force of the sliding parts of each mechanical part.

By gradually increasing or decreasing the voltage applied to the solenoid 21 as described above, the steep operation of the plunger 21b can be suppressed, and as a result, the above-described collision sound can be reduced. become able to. In FIG. 3, the voltage application time for unlocking (0.25 sec) and the voltage application time for locking (1.5 sec)
The difference is that when opening the opening / closing door 2, it is preferable that a person does not wait, and after a person passes and closes the opening / closing door 2, it is not always necessary to quickly lower the deadbolt 23. Because there is no.

FIG. 4 is a graph comparing the magnetic attraction force characteristics of the solenoid by the voltage control with the conventional magnetic attraction force characteristics.

When the solenoid 21 is excited, in the control of the conventional electric lock, as shown by the characteristic E, a magnetic attraction exceeding the spring pressure of the coil spring 24 is instantaneously generated by the application of a voltage (E ₁ ). Thereafter, the magnetic attractive force increases in proportion to the stroke of the plunger 21b, that is, as the plunger 21b is stored in the magnetic coil 21a, and when the plunger 21b is completely stored in the magnetic coil 21a. The maximum magnetic attraction force (Ema
x).

On the other hand, according to the voltage control of this embodiment,
If a predetermined voltage is applied as shown in the characteristic F,
As a result, the magnetic attraction force once increases the spring pressure of the coil spring 24.
(F ₁), In other words, the coil spring 24
Against the biasing force of
It rises to the point where the plunger can start moving, but
Is a coil that is compressed to gradually increase the voltage.
The spring pressure characteristic of the spring 24 is higher, but lower than the characteristic E.
The magnetic attraction force is increased by the air attraction force (see G in the figure).
To Emax. As a result, the amount represented by the shaded
Magnetic attraction can be suppressed.

Therefore, the operation noise can be reduced by reducing the energy at which the edge of the guide groove 22c in the link plate 22 collides with the pin 22a.

FIG. 5 shows the result of measurement of the operation sound of the energized lock type electric lock, comparing the operation sound of the present embodiment with the operation sound of the present embodiment.

As shown in the figure, while the locking sound of the conventional electric lock was 80 dB, in the present embodiment, it can be reduced to 50 dB, and the unlocking sound is 67 dB. In the present embodiment, it was possible to reduce it to 59 dB.

FIG. 6 shows a second embodiment of the present invention, in which an electric lock is constituted by a through-electrolytic tablet. This electroless tablet type electric lock is an ATM (Automatic Teller Machine).
e): Suitable for an entrance door of an automatic teller machine, for example, when no power is supplied such as during a power outage, a deadbolt is lowered to lock and secure security.

FIG. 9A shows the operation state when no current is supplied.
(B) shows an operation state at the time of energization. In the following description, the same components as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.

In the case of the electro-lock type electric lock, the electromagnetic coil 21
When a voltage is applied to a, as shown in FIG. 6B, the plunger 21b advances in the direction of the arrow G against the urging force of the coil spring 30 due to the magnetic attraction, and the link plate 22 moves about the pivot 22a. It rotates in the direction of arrow H, and pulls up the pin 23a engaged with the guide groove 22c. Thereby, the dead bolt 23 is stored in the case 20,
It comes off from the lock receiving section 7. In the drawing, reference numeral 31 denotes a stopper for regulating the upper limit of the rotation range of the link plate 22.

The voltage applied to the electromagnetic coil 21a is controlled by the electric lock controller 9. The control operation will be described with reference to a time chart of FIG.

FIG. 7A shows a conventional voltage application pattern shown as a comparative example, and FIG. 7B shows a voltage application pattern according to the second embodiment.

First, in the conventional voltage application pattern, when the unlock signal is given, the voltage is sharply raised to 90V. Therefore, the plunger 21b advances against the urging force of the coil spring 24, and when the link plate 22 jumps up, the pin 23a cannot trace the hook-like shape of the guide groove 22c at a high speed. A collision sound is generated.

On the other hand, after the solenoid 21 operates, it is held at the holding voltage, and then when a locking signal is given,
The energization of the solenoid is released, and the holding voltage sharply falls to 0V. At this time, the pressing force acting against the urging force of the coil spring 24 is instantaneously lost, so that the dead bolt 23 rises only by the returning force of the coil spring 24. That is, the dead bolt 23 cannot be raised gently, and a collision sound is generated in the same manner as described above.

On the other hand, in the second embodiment, when the unlock signal is given, the voltage is gradually increased from the holding voltage as shown in FIG. In particular,
It is controlled to increase from 35 V to 90 V in a period of 0.25 sec.

Further, even when the lock signal is given, the voltage is gradually lowered from the holding voltage,
Control is performed so that the voltage drops from 35 V to 0 V in the period of sec. By gradually increasing or decreasing the voltage in this way, it is possible to suppress the sudden operation of the plunger 21b, and thereby to reduce the above-described collision sound even with the electro-lock type electric lock. .

Further, the collision force generated at the connecting portion between the link plate 22 and the dead bolt 23 during the operation of the solenoid can be reduced, so that the reliability of the electric lock can be increased and the life can be extended. .

Although the mechanical mechanism of the present invention is constituted by a link plate in the above embodiment, the present invention is not limited to this. Any mechanical mechanism that mechanically transmits the reciprocating operation of the plunger to the deadbolt can be used. Is included.

[0059]

As is apparent from the above description,
According to the first aspect of the present invention, when the voltage is applied, the plunger of the solenoid is operated while suppressing an abrupt operation, so that the operating noise of the electric lock can be significantly reduced. Further, since the operation of the mechanical mechanism for transmitting the power of the plunger to the lock body becomes smooth, the reliability of the electric lock can be improved and the life can be prolonged.

According to the second aspect of the present invention, since the voltage is increased after the predetermined voltage is raised, the operation time can be shortened as compared with the case where the voltage is gradually increased from 0 V to the operating voltage. .

According to the third aspect of the present invention, after the solenoid is operated, the applied voltage is maintained at a holding voltage lower than the solenoid operating voltage, and the applied voltage is gradually reduced starting from the holding voltage. Therefore, the operating noise and the shock can be further reduced.

According to the fourth aspect of the present invention, the predetermined voltage is
By setting the magnetic attraction force of the solenoid generated by the application of the voltage to a value at which the solenoid starts to oppose the spring pressure, the solenoid can be effectively controlled.

According to the fifth aspect of the present invention, the operation noise of the electric lock can be greatly reduced.

According to the sixth aspect of the present invention, in an automatic door device provided with an electric lock, quietness in locking and unlocking can be improved. Thus, the automatic door device can be installed in an environment where quietness is required.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of an automatic door device according to the present invention.

FIG. 2A is a non-energized state of an energized lock type electric lock;
(B) is an enlarged sectional view showing an energized state.

3A and 3B are time charts showing an example of a conventional control, and FIG. 3B is a time chart showing an example of a control according to the present embodiment, with respect to the operation of the electric lock type electric lock.

FIG. 4 is an explanatory diagram showing an operation noise reduction effect of the present invention.

FIG. 5 is a graph showing measurement results of an operation sound according to the present invention.

FIG. 6 (a) is a non-energized state of the electro-conductive tablet type electric lock,
(B) is an enlarged sectional view showing an energized state.

7A and 7B are time charts showing an example of a conventional control, and FIG. 7B is a time chart showing an example of a control according to the present embodiment, with respect to the operation of the electroless tablet type electric lock.

FIG. 8 is an explanatory diagram showing a configuration of a conventional electric lock.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic door apparatus 2 Opening / closing door 2a, 2b Door hanger 3 Header box 4 Travel rail 5c Timing belt 5d Door engine 5e Door engine controller 7 Lock receiving part 8 Electric lock 8a Dead bolt 9 Electric lock controller 10 Fixed panel 20 Case 20a Support shaft 21 Solenoid 21a Electromagnetic coil 21b Plunger 22 Link plate 22c Guide groove 23 Dead bolt 23a Pin 24 Coil spring 25 Stopper

Claims (6)

[Claims] 1. Energizing or de-energizing a solenoid causes a plunger to advance or retreat against a biasing force of a spring or by a return force of a spring, and a lock body connected to the plunger via a mechanical mechanism is In an electric lock which is disengaged from a door, when the lock body is disengaged, the voltage is gradually increased to an operating voltage at which the solenoid can be reliably operated at the time of excitation, and the voltage is increased when the excitation is released in the solenoid operating state. A method for controlling an electric lock, wherein the application is gradually reduced. 2. When applying a voltage to the solenoid,
2. The control method for an electric lock according to claim 1, wherein after starting up to a predetermined voltage lower than the operating voltage, the voltage is gradually increased starting from the predetermined voltage. 3. The electric device according to claim 1, wherein after the solenoid is operated, the applied voltage is maintained at a holding voltage lower than the solenoid operating voltage, and the applied voltage is gradually reduced starting from the holding voltage. Lock control method. 4. The electric lock control method according to claim 1, wherein the predetermined voltage is set to a value at which the plunger can start moving at least against the urging force of a spring. 5. A lock body connected to the plunger via a mechanical mechanism by energizing or de-energizing the solenoid causes the plunger to advance or retreat against the urging force of the spring or by the return force of the spring. In an electric lock that is disengaged from a door, voltage control gradually increases the voltage to an operating voltage at which the solenoid can operate reliably when energized, and gradually reduces the voltage application when the excitation is released in the solenoid operating state An electric lock device comprising means. 6. An open / close door, driving means for opening / closing the open / close door, and an electric lock for locking the door when the open / close door is closed, wherein the electric lock excites or excites a solenoid. By releasing the plunger, the plunger moves forward or backward against the urging force of the spring or by the return force of the spring, a lock body connected to the plunger via a mechanical mechanism, and an operation in which the solenoid can reliably operate when excited. An automatic door device comprising: voltage control means for gradually increasing the voltage to a voltage and gradually reducing the application of the voltage when the excitation is released in the solenoid operating state.