JP2599858B2 - Passenger conveyor control 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 control system for a passenger conveyor, and more particularly, to an improvement in an outdoor passenger conveyor that can be stopped at night.

[0002]

2. Description of the Related Art FIGS.
1 shows a conventional passenger conveyor driving device disclosed in Japanese Patent No. 6697. In the figure, reference numeral 1 denotes a drive unit, and 2 denotes a drive unit fixed to a frame 3 of a passenger conveyor.
A base 4 for supporting the motor 4 is an electric motor, 5 is a pulley fixed to the output shaft 4a of the electric motor 4, 6 is a parallel shaft reducer on which the electric motor 4 is mounted and fixed to the base 2, and 7 is this reducer. Reference numeral 6 denotes a pulley fixed to the input shaft 6a, and reference numeral 8 denotes a belt wound around each of the pulleys 5 and 7.

[0003] Further, reference numeral 9 denotes an output shaft 6 of the parallel shaft reducer 6.
b, a chain gear fixed to b, 10 is a drive chain gear, 11 is a chain that is wound between these two chain gears and transmits the driving force from the electric motor 4 to the drive chain gear 10, and 12 is a chain of the electric motor 4. A manual rotating bundle that is detachably provided on the side opposite to the pulley of the output shaft 4a, and 13 is the parallel shaft speed reducer 6 described above.
Is a disc brake attached to the input shaft 6a on the side opposite to the pulley 7.

[0004] Further, reference numeral 14 denotes a coil of the disc brake 13 wound around a core 15 fixed to the casing of the parallel shaft reducer 6, and 16 denotes a coil toward the core 15 by a magnetomotive force generated by energizing the coil 14. The armature to be sucked, 17 is a disk plate, 18 is a lining of a brake fitted to the disk plate 17,
The lining 1 fitted to the disc plate 17 by moving the
8, the brake can be released. Further, reference numeral 19 denotes an outer plate, 20 denotes an armature 16 and an outer plate 1.
These springs bias in nine directions.

[0005]

By the way, the brake mechanism shown in FIG. 6 is installed outdoors, and has the following problems. a. Dew condensation occurs on the brake, and the brake lining 1
No. 8 has a low wet friction coefficient and tends to slip. b. The armature 16 or the outer panel 19 gets wet due to dew condensation and rusts, sticks to the brake lining 18, cannot be released, and the passenger conveyor cannot be started. c. When the coil 14 is condensed, the insulation is deteriorated and the brake cannot be operated.

Although it is conceivable to cover the brake body, it was not possible to prevent dew condensation even if rainwater was avoided. Further, as a countermeasure against these problems, a heater may be arranged around the brake, but there are problems in cost and space, and none of them can be a preferable solution.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-described problems in the conventional example, and provides a passenger conveyor control device that does not cause dew condensation on brakes when an outdoor passenger conveyor is stopped. The purpose is to:

[0008]

A control device for a passenger conveyor according to the present invention has a voltage-stopping power supply device for supplying a predetermined low current to a brake coil of the passenger conveyor, and a timer that operates after the passenger conveyor is stopped. And a brake circuit for controlling energization of the low current from the low-voltage power supply device to the brake coil after the set time of the timer.

[0009]

According to the present invention, the brake circuit causes the timer after the passenger conveyor is stopped to operate, and after the set time, the brake coil is energized with a predetermined low current from the low-voltage power supply device to heat the brake coil. This heat generation keeps the brake body, especially the lining, always dry.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing a control circuit of the passenger conveyor. In FIG. 1, 21 is a group of various safety switches, 22
And 23 are start switches for ascending and descending operations, 24 is a stop switch, 25 and 26 are relays for ascending and descending operations, and normally open contacts 25a and 25c and 226, respectively.
a and 26c and normally closed contacts 25b and 26b. Reference numeral 27 denotes a traveling relay.

FIG. 2 is a circuit diagram showing a brake circuit of the passenger conveyor. 2, 25d and 26d are normally open contacts of the ascending and descending operation relays 25 and 26 shown in FIG. 1, and 27a and 27b are the traveling relays 2 shown in FIG.
7 is a timer having a normally open time limit contact 28a that closes after a set time, 29 is a normally open contact 29
Electromagnetic contactors having a and 29b, 30 to 32 are transformers and switches and a diode stack that constitute a low voltage power supply device, and 33 is a discharge resistor connected in parallel to the brake coil 14.

Next, the operation according to the above configuration will be described. In FIG. 1, when the start switch 22 for ascending operation is closed assuming that it is now started in the ascending direction, (+) −
Safety switch group 21-stop switch 24-start switch 22 for ascending operation-normally closed contact 26b-relay 2 for ascending operation
The ascending operation relay 25 is energized by the closed circuit of 5-(-).

When the ascending operation relay 25 is energized, the normally open contacts 25a and 25c are closed.
(+)-Safety switch group 21-stop switch 24-normally open contact 25a-normally closed contact 26b-ascending operation relay 25-
The (−) closed circuit holds the ascending operation relay 25 by itself, and (+) — the safety switch group 21—the stop switch 24—the normally open contact 25a—the normally closed contact 26b—the normally open contact 2
5c-The traveling relay 27 is energized by the closed circuit of the traveling relay 27-(-).

In the brake circuit of FIG. 2, the normally open contacts 25d and 27a are closed by the energization of the ascending operation relay 25 and the traveling relay 27.
(+)-Normally open contact 25d-Passenger conveyor brake coil 14-Normally open contact 27a-(-) closed circuit urges the passenger conveyor brake coil 14 to release the disc plate 17 shown in FIG. It In addition, power is supplied to the electric motor 4 that rotates the steps by the urging of the ascending operation relay 25 and the traveling relay 27, and as a result, the man conveyor is started in the ascending direction.

Next, in FIG. 1, when the stop switch 24 is released to stop the passenger conveyor, the ascending operation relay 25 and the traveling relay 27 are deenergized, so that the brake coil 14 shown in FIG. It is de-energized, the power supply to the electric motor 4 is cut off, and the passenger conveyor is stopped. At this time, since the normally closed contact 27b of the traveling relay 27 shown in FIG. 2 is closed from the released state, the timer 28 is energized by the closed circuit of (+)-normally closed contact 27b-timer 28-(-). .

After a predetermined time period from the activation of the timer 28, the normally open time limit contact 28a is closed, so that (+)-
The normally open time limit contact 28a-the electromagnetic contactor 29-(-) is urged by the closed circuit of the electromagnetic contactor 29, and its normally open contact 29a.
And 29b are closed, the brake coil 14 is energized by the low-voltage power supply device composed of the transformer 30, the switch 31, and the diode stack 32.

Here, this low-voltage power supply device is lower than the control power supplies (+) and (-), and does not have the ability to attract the armature 16 even when the brake coil 14 is energized. Therefore, when the passenger conveyor is stopped, the timer 28
After the set time elapses, a dark current can be caused to flow by applying a low voltage power supply to the brake coil 14, whereby the brake coil 14 generates heat, no dew condensation occurs, and the torque at stop does not decrease. Instead of the heater,
The brake body, in particular the lining 18, can always be kept dry.

When the passenger conveyor is not used, that is, when the vehicle is not in operation, a low current is continuously supplied to the brake coil 14 to generate heat, thereby keeping the brake body, particularly the lining 18, in a dry state at all times to prevent the occurrence of dew condensation. , Condensation can be generated. However, applying a low current to the brakes will cause the brakes to release,
Brake holding torque is reduced. That is, if the stopping distance is extended or there are many passengers, the vehicle cannot be stopped, and it is dangerous to apply a low current to the brake when the electric motor is stopped.

In this embodiment, a timer 28 is provided for this purpose, and a low current is supplied after a certain time (for example, one minute) has elapsed after the motor is stopped. For this reason, after the motor stops, a low current flows after the passenger conveyor is completely stopped (or considering the time until the passenger gets off even if there is a passenger on the passenger conveyor), so that the brake holding torque is reduced by the low current. But there are no safety issues.

[0020]

As described above, according to the present invention, a dark current is supplied to the brake coil after a lapse of a predetermined time after the stoppage of the passenger conveyor, so that the brake coil generates heat and the brake body is always in a dry state. And dew condensation can be prevented.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a control circuit of a passenger conveyor according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a brake circuit of a passenger conveyor according to an embodiment of the present invention.

FIG. 3 is a front view showing a conventional passenger conveyor.

FIG. 4 is a plan view taken along the line II-II of FIG.

FIG. 5 is a plan view seen from the direction of the line III-III in FIG. 4;

FIG. 6 is a sectional view taken along the line IV-IV in FIG. 4 and is a configuration diagram of the disc brake.

[Explanation of symbols]

 14 Brake coil 24 Stop switch 25 Ascending operation relay 26 Ascending operation relay 27 Traveling relay 28 Timer 29 Magnetic contactor 30 Transformer 31 Switch 32 Diode stack

Claims (1)

(57) [Claims] 1. A low-voltage power supply for supplying a predetermined low current to a brake coil of a passenger conveyor, and a timer that operates after the passenger conveyor is stopped, and a low current from the low-voltage power supply after a set time of the timer. And a brake circuit for controlling energization of the brake coil.