JP3155627B2 - Automatic door power outage brake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power failure brake device for an automatic door which prevents runaway of the door when an electrical abnormality such as a power failure occurs while the automatic door is being opened or closed.

[0002]

2. Description of the Related Art A conventional technique will be described below with reference to the drawings.

FIG. 3 is a block diagram of a conventional power failure brake device, which shows a power failure state. 1 is a control unit, 2 is a transformer 20 and a full-wave rectifier 21a,
A power supply circuit 21b, a power generation brake circuit 3 in which a control resistor 10 and a normally closed contact 11A linked to a relay 11 are connected in series, and a motor drive circuit 12 The DC motor 5 of the door engine 6 is a control device that outputs a forward rotation, a reverse rotation, and a stop signal to the motor drive circuit 12 based on a signal from a detection sensor (not shown).

[0004] Relay 11 is provided between the positive electrode P and a negative electrode N of the AC power supply (not shown) to detect whether the voltage the relay 11 to the power supply circuit 2 is applied to the power supply circuit 2 is a voltage applied When it is detected that
When the relay 11 is excited, the normally closed contact 11A interlocked with the relay 11 is opened, and the power generation brake circuit 3 is not formed.
Conversely, when the relay 11 detects that no voltage is applied to the power supply circuit 2, the relay 11 is demagnetized and the normally closed contact 11 </ b> A interlocked with the relay 11 is closed to form the power generation brake circuit 3. .

[0005] The DC motor 4 is supplied via a motor drive circuit 12 after a voltage from an AC power supply (not shown) is converted into DC by a full-wave rectifier circuit 21. Drive.

In the power failure brake device having such a configuration, an AC power supply (not shown)
When a voltage is applied to the power supply circuit 2, the relay 11 is excited, a normally-closed contact 11A interlocked with the relay 11 is opened, and the AC100V voltage applied to the power supply circuit 2 is
The voltage is converted to 12 VDC through the transformer 20 and the full-wave rectifier 21a, and is converted to 5 VDC through the transformer 20 and the full-wave rectifier 21b. Note that the converted DC 12 V is supplied to a detection sensor (not shown), and the converted DC 5 V is supplied to the control device 5.

The voltage applied to the power supply circuit 2 is converted from AC to DC by the full-wave rectifier circuit 21 and supplied to the DC motor 4 via the motor drive circuit 12. At this time, since the relay 11 is energized, the normally closed contact 11A is in the open state, and the power generation brake circuit 3 is not formed. Therefore, the DC motor 4 does not short-circuit.

Thereafter, when the detection sensor detects, for example, a pedestrian by a detection sensor (not shown), a detection signal is input from this detection sensor to the control device 5, and the control device 5 issues a forward rotation signal to the motor drive circuit 12, and When the motor 4 is driven, the door provided via the drive pulley and the drive belt (not shown) is moved in a direction in which the door is opened, an opening is secured, and a pedestrian can pass.

When the voltage supplied to the power supply circuit 2 disappears due to an electrical abnormality such as a power failure, the relay 11 is demagnetized, the normally closed contact 11A is closed, and the power generation brake circuit 3 is formed. The DC motor 4 is short-circuited, and the driving pulley and the driving belt are stopped. Therefore,
When the door is driven to close or open the opening, even if there is a power failure, a braking force is applied to the door connected to the drive belt to prevent the door from running away.

When the braking force is W, the current is I, the voltage is E, and the resistance value is R,

[0011]

[Formula 1]

Thus, the braking force W acts as the square of the current I, and the smaller the resistance value R, the greater the braking force W
Becomes larger.

[0013]

In the above automatic door power failure brake device, when the detector detects that an electrical abnormality such as a power failure has occurred while the door is moving, it is normally closed in conjunction with the detector. Is closed, a power generation brake circuit is formed, the drive unit is short-circuited, and the braking force is applied to the door, so it is necessary to manually open and close the door once stopped However, there is a problem that a force greater than the braking force applied to the door is required.

In the automatic door power failure brake device of the present invention,
In order to solve this problem, an electrical abnormality such as a power failure occurred, a brake force was applied to the door, and after the door was stopped, the brake force was released, and the door was manually opened and closed. It is an object of the present invention to provide a power outage brake device for an automatic door, which requires less force than conventional ones.

[0015]

To achieve the above object, a power failure brake device for an automatic door according to the present invention is provided with a detector for detecting a power failure in a power supply circuit of a control unit,
In an automatic door power failure brake device having a configuration in which a power generation brake circuit having normally closed contacts linked to an output signal of the detector is provided in parallel with a door driving unit, a delay output circuit is provided in a power supply circuit of the control unit. A normally open contact linked to an output signal from the delay output circuit is connected in series in the power generation brake circuit.

[0016]

In the above-described automatic door power failure braking device of the present invention, a delay output circuit is provided separately from the detector in the power supply circuit of the control unit, and a normally open contact linked to the delay output circuit is provided in the power generation brake circuit. Therefore, when the voltage supplied to the control unit and the drive unit is lost due to an electrical abnormality such as a power failure, the detector that detects the power failure and the delay output circuit operate, short-circuit the drive unit, and After applying the braking force to stop the door, the braking force applied to the door is released, and the force for manually opening and closing the door requires less force than the conventional one.

[0017]

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

FIG. 1 is a block circuit diagram of a power failure braking device for an automatic door according to the present invention. FIG. 1 shows a power failure state (a state in which no voltage is applied to the power supply circuit 2). 13 denotes a diode 14 and a capacitor 15.
A delay output circuit 16A comprising a relay 16 and a relay 16 is a normally open contact which is linked to the relay 16 of the delay output circuit 13. The delay output circuit 13 is provided between the full-wave rectifier 21a and a detection sensor (not shown) in parallel with the full-wave rectifier 21a, and the relay 16 constituting the delay output circuit 13 is provided with the capacitor 15 in parallel. I have. The normally open contact 16A linked to the relay 16 is connected in series between the normally closed contact 11A of the power generation brake circuit 3 and the control resistor 10.

The other components are the same as the components shown in FIG. 3, and the same components are denoted by the same reference numerals.

FIG. 2 is a diagram showing the energized / demagnetized state of the relays 11 and 16 of FIG. 1, the open / closed state of the normally closed contact 11A and the normally open contact 16A, and the state of formation of the power generation brake circuit 3. Incidentally, when the power supply of T ₀ o'clock this apparatus in the figure, at T ₁ is that a power failure has occurred is detected relay 11, when started giving braking force to the door, at T ₂ When the brake force applied to the door is released, T ₃
Indicates the time when the power failure was avoided.

With the above-described configuration, when a voltage is applied to the apparatus, the relays 11 and 16 are excited, so that the normally closed contact 11A linked with the relay 11 is opened, and the normally open contact 11A linked with the relay 16 is opened. The contact 16A is closed,
The generator brake circuit 3 is not formed (T _{0 in} FIG. 2).

Then, when there is no power failure (normal time), the automatic door performs a normal operation similarly to the conventional one, and when a power failure occurs, the relay 11 detects the power failure, as shown in FIG. Then, the relay 11 is demagnetized, and the normally-closed contact 11A linked with the relay 11 is closed.

[0023] At this time, the relay 16 is fixed time by the charge stored in the capacitor 15 (time until the charge stored in the capacitor 15 is eliminated) since it is energized, normally open in conjunction with the relay 16 Contact 16A is closed. Therefore, the power generation brake circuit 3 is formed,
Since the DC motor 4 is short-circuited and the drive pulley (not shown) and the drive belt are stopped, a braking force is applied to the door connected to the drive belt, thereby preventing the door from running out of control (FIG. 2T ₁ ).

When the electric charge stored in the capacitor 15 is released and the relay 16 is demagnetized, the normally open contact 16A interlocking with the relay 16 is opened, and the power generation brake circuit 3 is not formed, and is applied to the door. Release the braking force (T2 in FIG. ₂ ).

[0025] That is, the power failure occurs, the relay 16 when the relay 11 detects the power failure (Fig 2T ₁₎ is demagnetized, the normally open contact 16A in conjunction with the relay 16
Until the capacitor becomes an open state (T _{2 in} FIG. ₂ ).
The relay 16 is held in the excited state by the electric charge stored in the relay 11, so that a time lag occurs, and the relay 11 and the relay 16 are not simultaneously demagnetized even if a power failure occurs. Therefore, the timing at which the contacts 11A and 16A interlocking with the relays 11 and 16 are opened or closed differs, and the contact 11A and the contact 1
6A becomes both closed state, the timing at which the power generation braking circuit 3 is formed (FIG. 2T ₁ through T ₂ between) can, only giving a brake force to the door during this time to stop the door.

Thereafter, when the power failure state is avoided, the relays 11 and 16 are energized, so that the normally closed contact 1
1A is opened, the contacts 16A of the normally open is closed, the same state as the voltage to the device is applied (Figure 2T ₀₎ (Figure 2T _3).

As described above, according to the automatic door power failure brake device of the present embodiment, a power failure occurs, a braking force is applied to the door, and then the braking force is released.
When the door is manually opened and closed, the door can be opened and closed with a smaller force than a conventional one.

In the above embodiment, the delay output circuit 13
Is provided in parallel with the full-wave rectifier 21a between the full-wave rectifier 21a and the detection sensor (not shown), but is provided in parallel with the full-wave rectifier 21b between the full-wave rectifier 21b and the control device 5. Even if it is provided, the same effect as the above embodiment can be obtained.

In the above embodiment, the door is opened and closed using the DC motor 4. However, when an AC motor is used instead of the DC motor, the control unit 1 is used.
In this case, the same effect as that of the above embodiment can be obtained even with the automatic door power failure brake device having such a configuration.

[0030]

As described above in detail, according to the automatic door power failure brake device of the present invention, if an electrical abnormality occurs due to a power failure or the like while the automatic door is being opened or closed, the door runs away. The brake force is applied to the door in order to prevent the opening of the door, and then the brake force is released, so that when the door is manually opened and closed, the door can be manually opened and closed with a smaller force than the conventional one. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a block diagram of an automatic door power failure brake device as one embodiment of the present invention.

FIG. 2 shows a state of excitation and demagnetization of relays 11 and 16 in FIG. 1,
It is a figure which shows the opening / closing state of the normally closed contact 11A, the normally open contact 16A, and the formation state of the power generation brake circuit 3. FIG.

FIG. 3 is a block circuit diagram of a conventional automatic door power failure brake device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control unit 2 Power supply circuit 3 Power generation brake circuit 4 DC motor (drive part) 11 Relay (detector) 11A Normally closed contact 13 Delay output circuit 16A Normally open contact

Claims (1)

(57) [Claims] A power supply circuit of a control unit is provided with a detector for detecting a power failure, and a power generation brake circuit having a normally closed contact interlocked with an output signal of the detector is provided in parallel with a door drive unit. In the automatic door power failure brake device, a delay output circuit is provided in a power supply circuit of the control unit, and a normally open contact that is linked to an output signal from the delay output circuit is connected in series in the power generation brake circuit. Automatic door power outage brake device.