JP5432006B2 - Malfunction prevention device for electric lock system - Google Patents

Description

  The present invention relates to a malfunction prevention device for an electric lock system that controls locking and unlocking of an electric lock including a coil and a solenoid to which electric power is supplied from an electric lock control panel.

  Conventionally, for example, a door of a commercial building, a public facility, or a general house has been provided with an electric lock system having a high crime prevention property in order to avoid intrusion of a suspicious person. In this type of electric lock system, a dead bolt is electrically advanced and retracted by driving a driving means such as a motor or a solenoid, for example, according to a specific locking / unlocking signal (for example, Patent Document 1 below). ).

  Further, as an electric lock system 11 using a coil or a solenoid as a driving means for locking and unlocking the electric lock, for example, as shown in FIG. 3, an electric lock control panel 12 is connected to the electric lock 14 via a conversion device 13. A wired connection is known. In FIG. 3, a coil 14 a is used as a driving means for locking and unlocking the electric lock 14.

  In the electric lock system 11 of FIG. 3, when a lock command (or unlock command) for locking (or unlocking) the electric lock 14 is input from the outside to the electric lock control panel 12, the electric lock control panel Power is supplied from 12 to the electric lock 14 via the conversion device 13, and the first detection switch SW1 for detecting locking / unlocking of the electric lock 14 and the second detection switch SW2 for detecting opening / closing are turned on. The state of locking / unlocking and opening / closing is monitored by a monitor signal corresponding to the off operation, and the electric lock 14 is locked or unlocked based on the result of the state monitoring.

  By the way, in this type of electric lock system 11, coils and solenoids used as drive means for locking and unlocking the electric lock 14 are electrically locked so that various electric locks 14 can be controlled by the electric lock control panel 12. In contrast, the capacitance of the capacitor C1 in the internal circuit of the electric lock control panel 12 is set to a constant value. That is, as the capacitor C1 in the internal circuit of the electric lock control panel 12, an unmatched capacitor that does not take into account the voltage generated from the electric lock 14 is used.

  FIG. 4 shows a schematic diagram of the internal circuit configuration of the electric lock system 11 of FIG. The operation will be described below.

  When electric power is supplied from the electric lock control panel 12 to the electric lock 14 via the converter 13 in accordance with an external locking command, the electric lock system 11 generates a current generated from the electric lock control panel 12 as shown in FIG. As indicated by the arrow D, the electric lock 14 passes through the coil L built in and returns to the electric lock control panel 12. At this time, the electric lock control panel 12 is charged in the capacitor C1 of the internal circuit.

  Thereafter, when the electric lock control panel 12 cuts off the power supply and the circuit becomes a closed circuit, the capacitor C1 of the internal circuit of the electric lock control panel 12 starts to discharge.

  The capacitor C1 stores the discharged current again. When the capacitor C1 is sufficiently charged, as shown by an arrow E in FIG. 4, the capacitor C1 starts discharging in the direction opposite to the above-described discharging. The capacitor C1 stores the discharged current again. The electric lock 14 holds the lock by repeating these charging / discharging phenomena, and continues until the electric power consumed by the generation of the magnetic force of the coil L disappears.

  Further, the electric lock 14 incorporating the coil L as a driving means is unlocked when the power supply from the electric lock control panel 12 is cut off. At that time, the electric lock control panel 12 receives the monitor signal from the electric lock 14 via the conversion device 13 and monitors the unlocked state at the voltage level.

Japanese Patent Laid-Open No. 10-025935

  In the conventional electric lock system 11 shown in FIGS. 3 and 4, when the electric lock 14 is unlocked, the electric lock control panel 12 faces backward due to the charge / discharge phenomenon of the capacitor C <b> 1 in the internal circuit of the electric lock control panel 12. Is generated. For this reason, the electric lock control panel 12 cannot observe the monitor signal to be originally observed from the electric lock 14, and there is a possibility of causing a malfunction due to erroneous state monitoring. In addition, an overcurrent may flow into the electric lock control panel 12 due to the reverse voltage of the electric lock 14 generated when the energy stored in the capacitor C1 is consumed, and the electric lock control panel 12 and the converter 13 may be destroyed. It was.

  Further, in the conventional electric lock system 11 shown in FIGS. 3 and 4, the electric lock control panel 12 corresponds to various electric locks 14. Therefore, the electric lock 14 is used as the capacitor C <b> 1 of the internal circuit of the electric lock control panel 12. An unmatched voltage that does not take into account the voltage generated from the is used. For this reason, when the electric lock 14 is unlocked, even if the voltage applied from the electric lock control panel 12 to the electric lock 14 is cut off, the magnetic force is generated due to the charge / discharge phenomenon of the capacitor C1 in the internal circuit of the electric lock control panel 12. It was continuously generated, and the electric lock 14 remained in the locked state while maintaining the adsorbed state, and it took extra time to unlock the electric lock 14.

  Therefore, the present invention has been made in view of the above problems, and can prevent an abnormal current from flowing into the electric lock control panel, and can reduce the time required to unlock the electric lock. It is an object of the present invention to provide a malfunction prevention device.

In order to achieve the above-described object, a malfunction prevention device for an electric lock system according to claim 1 is configured such that a first charge / discharge element is connected in parallel to a pair of output terminals of an electric lock control panel, and the electric lock control is performed. A device for preventing malfunction of an electric lock system that controls locking and unlocking of an electric lock provided with a driving means that is driven by power supplied from a panel,
A switching element that supplies power from the electric lock control panel to the driving means, and switches the electric lock so as to be disconnected from the electric lock control panel when power supply from the electric lock control panel is interrupted;
A backflow preventing element that is provided between the first charge / discharge element and the switching element and prevents a current flow in the reverse direction when discharging the first charge / discharge element;
And a second charge / discharge element that is connected in parallel with the drive means and stores electric power from the electric lock control panel.

The malfunction prevention device of the electric lock system according to claim 2 is the malfunction prevention device of the electric lock system according to claim 1,
A first detection switch for detecting locking / unlocking and a second detection switch for detecting opening / closing are provided in the electric lock,
A conversion device for converting a state monitoring signal from the first detection switch and the second detection switch into a voltage and sending it to the electric lock control panel is provided between the electric lock control panel and the electric lock. It is characterized by.

  According to the malfunction prevention device of the electric lock system according to the present invention, when the energy of the first charge / discharge element of the electric lock control panel is consumed by driving, the switching function of the switching element causes the electric lock control panel and the electric lock to You can cut the gap. Thereby, an abnormal current can be prevented from flowing into the electric lock control panel.

  In addition, in the state observation by the first detection switch and the second detection switch, the voltage due to the discharge of the first charging / discharging element of the electric lock control panel is interrupted by the switching element, so that the electric lock control panel has each detection switch. It is possible to correctly control the electric lock without causing erroneous detection of the state.

  Furthermore, considering the voltage generated from the electric lock as the second charge / discharge element, if the one adjusted to the coil is used, the first charge / discharge element of the electric lock control panel and the second charge / discharge of the malfunction prevention device The energy stored in the element can be efficiently consumed to release the attracted state, and the time required to unlock the electric lock can be shortened.

(A), (b) It is a block diagram which shows schematic structure of the electric lock system containing the malfunction prevention apparatus which concerns on this invention. It is the schematic of the internal circuit structure centering on the malfunction prevention apparatus of the electric lock system of FIG. It is a block diagram which shows schematic structure of the conventional electric lock system. It is the schematic of the internal circuit structure of the electric lock system of FIG.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. 1A and 1B are block diagrams showing a schematic configuration of an electric lock system including a malfunction prevention device according to the present invention, and FIG. 2 is an internal view centering on the malfunction prevention device of the electric lock system of FIG. It is the schematic of a circuit structure.

  The malfunction prevention device according to the present invention is used in an electric lock system that controls locking / unlocking of an electric lock including a coil and a solenoid at, for example, a gate, a house entrance door, and an entrance / exit of various tenants. As shown in FIGS. 1A and 1B, the electric lock system 1 is constructed by including an electric lock control panel 2, a conversion device 3, an electric lock 4, and a malfunction prevention device 5.

  In the electric lock system 1, the electric lock control panel 2 and the electric lock 4 are connected by wiring via the conversion device 3. Moreover, the malfunction prevention apparatus 5 is provided in the inside or the outside of the electric lock 4 and connected by wiring. Specifically, as shown in FIG. 1A, a malfunction prevention device 5 is provided inside the electric lock 4, and the malfunction prevention device 5 is connected to the conversion device 3 by wiring. As another configuration, as shown in FIG. 1B, a malfunction prevention device 5 is provided between the conversion device 3 and the electric lock 4 to be connected by wiring. Hereinafter, each structure which comprises the electric lock system 1 is demonstrated.

  First, the electric lock control panel 2 controls the locking and unlocking of the electric lock 4. When an unlocking command or a locking command for unlocking or locking the electric lock 4 is input from the outside, the electric lock 4 is powered. The state of locking / unlocking and opening / closing is monitored according to the level of the voltage of the monitor signal from the electric lock 4, and the electric lock 4 is controlled to be locked or unlocked accordingly.

  Further, as shown in FIG. 2, the electric lock control panel 2 has a first charging / discharging element comprising a series circuit of a resistor R1 and a capacitor C1 with respect to a pair of external connection terminals including a positive terminal and a negative terminal as shown in FIG. 2a are connected in parallel.

  The conversion device 3 converts a state monitoring signal (locking / unlocking signal, opening / closing signal) described later from the electric lock 4 into a voltage corresponding to the state, and controls the electric lock using the converted voltage as a monitor signal. Sending to board 2.

  The electric lock 4 incorporates, for example, a coil or a solenoid as drive means 4a for locking and unlocking. In FIG.1 and FIG.2, the structure of the electric lock 4 which incorporated the coil L as the drive means 4a is shown. The electric lock 4 having the coil L as the driving means 4a is installed on, for example, a door frame, and adsorbs or removes an adsorption plate installed on the door side by a magnetic force generated by power supply from the electric lock control panel 2. It is locked or unlocked.

  Although not shown, the electric lock 4 incorporating a solenoid as the driving means 4a energizes the solenoid from the electric lock control panel 2, drives the iron core inside the solenoid by the magnetic force generated by this energization, and the internal mechanism is interlocked. By doing so, it is locked or unlocked.

  The electric lock 4 also includes a first detection switch SW1 for detecting the locked / unlocked state and a second detection switch SW2 for detecting the opened / closed state. These detection switches SW1 and SW2 are reed switches that are turned on / off depending on the presence or absence of magnetic force generated by power supply from the electric lock control panel 2, and state monitoring signals (locking / unlocking signals, The door opening / closing signal) is transmitted to the conversion device 3.

  The malfunction prevention device 5 includes, as an internal circuit configuration, a backflow prevention element 5a, a voltage dividing element 5b, a switching element 5c, and a second charge / discharge element 5d, the input side of the electric lock control panel 2 via the conversion device 3 A pair of external connection terminals (+ terminal, −terminal) are connected, and the output side is connected to both ends of a coil L as drive means 4a of the electric lock 4.

  Further explaining the internal circuit configuration, the backflow prevention element 5a is composed of a diode D, the anode terminal is connected to the + terminal of the electric lock control panel 2 via the converter 3, and the cathode terminal is connected to one end of the coil L. Is done.

  The voltage dividing element 5b is composed of a series circuit of a resistor R2 and a resistor R3, and is connected in parallel to a pair of external connection terminals (+ terminal, −terminal) of the electric lock control panel 2 via the conversion device 3. More specifically, the resistor R2 has one end connected to the cathode terminal of the diode D and the other end connected to the resistor R3. The resistor R3 has one end connected to the resistor R2 and the other end connected to the negative terminal of the electric lock control panel 2 via the conversion device 3.

  The switching element 5c supplies the electric power from the electric lock control panel 2 to the coil L as the driving means 4a, and disconnects the electric lock 4 from the electric lock control panel 2 when the electric power supply from the electric lock control panel 2 is cut off. ON / OFF switching. The switching element 5c is composed of an NPN transistor Q having a switching function by emitter-base current (base current), the base is connected between the resistor R2 and the resistor R3, and the collector is the coil L of the electric lock 4. Connected to the other end, the emitter is connected to the negative terminal of the electric lock control panel 2 via the converter 3.

  The second charge / discharge element 5d is composed of a series circuit of a resistor R4 and a capacitor C2. One end of the resistor R4 is connected to the cathode terminal of the diode D and one end of the coil L of the electric lock 4, and the other end is connected to the capacitor C2. The The capacitor C2 is connected between the resistor R4 and the collector of the transistor Q.

  Next, operation | movement of the electric lock 4 in the malfunction prevention apparatus 5 of the electric lock system 1 comprised as mentioned above is demonstrated.

  When electric power is supplied from the electric lock control panel 2 to the electric lock 4, electric power is generated, base current flows through the base of the transistor Q, and the transistor Q is driven to be turned on. As a result, the electric current generated from the electric lock control panel 2 passes through the coil L of the internal circuit of the electric lock 4 as shown by the arrow A in FIG. Return to

  At this time, as indicated by arrows B and C in FIG. 2, the electric charge is stored in the capacitor C1 of the internal circuit of the electric lock control panel 2 and the capacitor C2 of the internal circuit of the malfunction prevention circuit 5. Thereafter, when the electric lock control panel 2 cuts off the power supply to unlock the electric lock 4 and the circuit becomes a closed circuit, the capacitor C1 of the internal circuit of the electric lock control panel 2 and the capacitor of the internal circuit of the malfunction prevention circuit 5 C2 begins to discharge.

  The current generated by the discharge of the capacitor C1 in the internal circuit of the electric lock control panel 2 is fed back through the diode D and the resistors R2 and R3 in the internal circuit of the malfunction prevention circuit 5. At this time, the capacitor C1 is charged, but since a backflow prevention diode D is inserted between the resistor R1 and the resistor R2, a current flows in the reverse direction (direction from the resistor R2 toward the resistor R1). Absent. In addition, since the transistor Q is not driven and is turned off by the power storage in the capacitor C1, the current due to the discharge of the capacitor C1 does not affect the electric lock 4.

  On the other hand, the current generated by the discharge of the capacitor C2 in the internal circuit of the malfunction prevention circuit 5 is stored in the capacitor C2 again through the resistor R4 and the coil L. At this time, if a capacitor adjusted in accordance with the coil L in consideration of the voltage generated from the electric lock 4 is used as the capacitor C2, the cycle of discharge → storage does not occur.

  Moreover, since the transistor Q is not driven and is in an off state, the electric lock control panel 2 does not perform an abnormal observation and does not malfunction with respect to state monitoring by observing the unlocked state.

  Similarly, the reverse current generated from the coil L of the internal circuit of the electric lock 4 does not flow to the electric lock control panel 2 because the transistor Q is not driven and is not turned on. 2 is not damaged.

  Thus, according to the malfunction prevention device of the electric lock system according to the present invention, when the energy of the capacitor C1 of the internal circuit of the electric lock control panel 2 is consumed by driving, the electric lock control panel is driven by the switching function of the transistor Q. 2 and the electric lock 4 can be shut off. Thereby, the flow of abnormal current to the electric lock control panel 2 can be prevented.

  In the state observation by the first detection switch SW1 and the second detection switch SW2, the voltage due to the discharge of the capacitor C1 in the internal circuit of the electric lock control panel 2 is interrupted by the transistor Q. The electric lock 4 can be correctly controlled without causing erroneous detection of the state from each of the detection switches SW1 and SW2.

  Furthermore, if the capacitor C2 of the internal circuit of the malfunction prevention circuit 5 is adjusted in capacity in consideration of the voltage generated from the electric lock 14, the capacitor C1 of the internal circuit of the electric lock control panel 2 and malfunction prevention are used. The energy stored in the capacitor C2 of the internal circuit of the device 5 can be efficiently consumed to release the attracted state, and the time until the electric lock 14 is unlocked can be shortened.

1 Electric Lock System 2 Electric Lock Control Panel 2a First Charge / Discharge Element (R1, C1)
3 Converter 4 Electric lock 4a Drive means (L)
5 Malfunction prevention device 5a Backflow prevention element (D)
5b Voltage divider (R2, R3)
5c Switching element (Q)
5d Second charge / discharge element (R4, C2)
SW1 First detection switch SW2 Second detection switch

Claims (2)

An error of the electric lock system that controls the locking and unlocking of the electric lock having the first charging / discharging element connected in parallel to the pair of output terminals of the electric lock control panel and having the driving means that is driven by the supply of electric power from the electric lock control panel. An operation prevention device,
A switching element that supplies power from the electric lock control panel to the driving means, and switches the electric lock so as to be disconnected from the electric lock control panel when power supply from the electric lock control panel is interrupted;
A backflow preventing element that is provided between the first charge / discharge element and the switching element and prevents a current flow in the reverse direction when discharging the first charge / discharge element;
An apparatus for preventing malfunction of an electric lock system, comprising: a second charge / discharge element connected in parallel with the drive means and storing electric power from the electric lock control panel. A first detection switch for detecting locking / unlocking and a second detection switch for detecting opening / closing are provided in the electric lock,
A conversion device for converting a state monitoring signal from the first detection switch and the second detection switch into a voltage and sending it to the electric lock control panel is provided between the electric lock control panel and the electric lock. The malfunction prevention apparatus of the electric lock system of Claim 1 characterized by the above-mentioned.

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