JP2603021B2 - 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 passenger conveyor control device, and more particularly to a passenger conveyor which is effective only for an escalator or a sloping sidewalk, excluding a horizontal man conveyor. This is to ensure safety.

[0002]

2. Description of the Related Art A passenger conveyor is provided with a brake and a braking force is applied thereto so that the transfer of steps is stopped so that the steps do not move when the operation is stopped. In addition, the brake is provided with a mechanism for holding the step at a stopped position in order to prevent the step from self-running in the descending direction due to a heavy object on the step.

For example, if a passenger uses a passenger conveyor that is at rest instead of stairs, the steps are subjected to a large force in the descending direction, so that when the above-mentioned brake is out of order or more passengers than expected by design. When a person uses instead of stairs, the passenger conveyor is self-propelled in the descending direction, which is dangerous.

As a conventional technique corresponding to such a phenomenon, for example, as disclosed in Japanese Patent Application Laid-Open No. 63-160990, a detecting means for detecting the self-propelled movement of a step is provided, and the step is moved in a descending direction. There is something. Further, as disclosed in Japanese Utility Model Laid-Open Publication No. 63-130482, there is a vehicle equipped with control means for controlling self-propelled movement of steps.

[0005]

However, in the above-mentioned prior art, for example, Japanese Unexamined Patent Publication No. 63-160990
In Japanese Patent Application Laid-Open Publication No. H10-27083, when a self-propelled vehicle is detected, the steps are suddenly descended, and there is a risk that the passenger may fall over, and the control does not operate at least until the passengers start descending, and it is not completely safe.

Further, in Japanese Utility Model Laid-Open No. 63-130482, sufficient braking force cannot be obtained, and safety cannot be greatly improved. On the other hand, as a countermeasure, it is a general measure to provide a plurality of brakes, but there are problems in cost and space.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended to prevent the passenger conveyor from being lowered after the motor is stopped so that the steps do not descend when the passengers use it instead of stairs. An object of the present invention is to provide a passenger conveyor control device capable of significantly improving braking holding capability and ensuring safety.

[0008]

According to the present invention, there is provided a passenger conveyor control apparatus comprising: a driving motor; an endlessly arranged and transferable step; and an operation command signal for driving the motor to drive the step. A power supply means for generating a low-torque driving force to the electric motor in the passenger conveyor provided with a control device for performing a transfer operation of the electric motor; The vehicle is provided with control means for supplying power and applying a low torque driving force in the ascending direction of the passenger conveyor.

[0009]

According to the present invention, the power supply is controlled by the control means so as to apply a low torque to the motor in a rising direction after a lapse of a predetermined time after the motor is stopped.

[0010]

【Example】

Embodiment 1 FIG. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a circuit diagram of a motor drive circuit. In FIG. 1, 1 is a drive motor for transferring the steps of a passenger conveyor arranged endlessly, 2 and 4 are overcurrent breakers, and 3 is a three-phase AC power supplied through an overcurrent breaker 2. The step-down output is supplied to the motor 1 via the overcurrent breaker 4, the normally open contact 9 a of the supply voltage control electromagnetic contactor 9 described later, and the overcurrent relay 6.

Reference numerals 16a and 17a denote normally open contacts of ascending and descending operation relays 16 and 17 which will be described later. When the normally open contact 9a of the electromagnetic contactor 9 is opened, the overcurrent relay 5
By switching the phase sequence of the power supplied to the motor 1 via the
The rotation direction of the electric motor 1 is switched.

FIG. 2 is a circuit diagram of a brake circuit connected to the terminals R ₁ and S _{1 of} FIG. In FIG.
Is an overcurrent breaker, 8 is a time relay which is excited and controlled via a normally closed contact 18b of a traveling relay 18 to be described later and closes a normally open timed contact 8a when a set time elapses, and 9 is a normally open contact 8a and an overcurrent. The supply voltage control electromagnetic which switches the supply voltage to the electric motor 1 from the full voltage state to the step-down voltage by the step-down transformer 3 by exciting and controlling the excitation through the normally closed contact 6a of the relay 6 to close the normally open contact 9a shown in FIG. Contactor.

Reference numeral 10 denotes a diode stack for obtaining a DC power supply for driving a brake circuit. Reference numeral 11 denotes a normally open contact 16b, 1 of a relay 16 or 17 for raising or lowering operation to be described later.
When the normally open contact 18a of the traveling relay 16 is closed, the brake coil 12 is supplied with DC power from the diode stack 10 to excite it.
Is a discharge resistor connected in parallel to

FIG. 3 is a circuit diagram showing a control circuit of the passenger conveyor. 3, 5a is a normally closed contact of the overcurrent relay 5 shown in FIG. 1, 13 and 14 are start switches for ascending and descending operations, 15 is a stop switch, and 16 and 1
Reference numeral 7 denotes a relay for ascending operation and a relay for descending operation, which have normally open contacts 16c and 16d, 17c and 17d, and normally closed contacts 16e and 17e, respectively. Reference numeral 18 denotes a traveling relay.

Next, the operation according to the above configuration will be described. Now, in FIGS. 1 and 2, overcurrent breakers 2, 4, 7
When the start switch 13 for ascending operation shown in FIG. 3 is closed in a state where both are closed, in FIG. 3, R ₂ -safety switch group-normally closed contact of the overcurrent relay 5 -stop switch 15 -for ascending operation. Start switch 13-normally closed contact 17e-
Increasing operation relay 16-S-increasing operation relay 16 by the _second closed circuit is energized.

[0016] The increasing operation relay 16 is energized, the normally open contacts 16c, so 16d is closed, R ₂
-Safety switch group-Stop switch 15-Normally open contact 16c
- with increasing operation relay 4 is self-held by the normally closed contact 17e- increase closed circuit operation relay 16-S _2, R
₂ -Safety switch group-Stop switch 15-Normally open contact 16
c-normally closed contact 17 e-normally open contact 16 d-travel relay 18
Running relay 6 is energized by the closed circuit -S _2.

In the brake circuit of FIG. 2, the normally open contacts 16b and 18a are closed by the energizing of the ascending operation relay 16 and the traveling relay 18, so that the diode stack 10 and the normally open contact 16b are closed. The brake coil 11 of the hall conveyor is energized by the closed circuit of the brake coil 11, the normally open contact 18a, and the diode stack 10, and the brake is released. And in FIG.
When the normally open contact 16a of the ascending operation relay 16 is closed, the full voltage is supplied to the electric motor 1 and the passenger conveyor is started in the ascending direction.

Here, when an overcurrent flows in the full-voltage power supply path to the electric motor 1, the overcurrent relay 5 is excited and its normally closed contact 5a shown in FIG. 16 and the travel relay 18 are deactivated, so that the normally open contact 16a in FIG. 1 is released from the closed state, and the passenger conveyor stops.

Next, when the travel relay 18 is deenergized,
The normally closed contact 18b shown in FIG. 2 is closed from the open state,
R ₂ - time limit relay 8 by a closed circuit of the normally closed contact 18b- time limit relay 8-S ₂ is energized. Since contact 8a when normally open limit is closed after a set time by the biasing, R ₂ - normally open Delayed Contact 8a- overcurrent relay 6 of the normally-closed contact 6a- supply voltage control solenoid contactor 9-S ₂ The electromagnetic contactor 9 is energized by the closed circuit.

When the electromagnetic contactor 9 is energized, the normally open contact 9a shown in FIG. 1 is closed, and the electric motor 1 is supplied with the power stepped down by the transformer 3. At this time, the brake coil 11 shown in FIG. 2 is kept deenergized, and the passenger conveyor is locked by the brake while the ascending direction is being moved.

That is, by setting the secondary voltage of the transformer 3, a low-voltage power supply can be supplied to the electric motor 1 such that the passenger conveyor is not activated by the brake lock. At this time, if the motor current is large, the overcurrent relay 6 operates and the normally closed contact 6a shown in FIG. 2 is opened, so that the electromagnetic contactor 9 is deenergized and the normally opened contact 9a shown in FIG. 1 is opened. Electric motor 1
The power supply to is cut off.

Thus, conventionally, the stopped passenger load is held only by the braking holding torque of the brake, but by applying the torque in the upward direction to the electric motor 1, the passenger load is held correspondingly. It is possible to increase the ability. However, at this time, if the torque generated by the electric motor 1 during the pause is larger than the brake torque, the conveyor moves in the ascending direction.

For this reason, the upward torque generated by the electric motor 1 must be equal to or less than the brake torque (approximately 50% is good). For example, when the 50% torque is generated, the holding torque is smaller than that of the conventional motor. It will be 150%.

Embodiment 2 FIG. In the first embodiment, the power supply means for generating a low torque in the electric motor 1 by using the step-down transformer 3 is configured. However, the same applies when the power supply dropped by a method such as an inverter or a star-delta connection is supplied. Effect can be expected.

[0025]

As described above, according to the present invention, low torque in the upward direction is generated for the electric motor at the time of suspension, so that the passenger holding capacity can be improved, and the passenger load at the time of suspension can be increased. Self-propelled can be prevented.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a motor drive circuit according to one embodiment of the present invention.

FIG. 2 is a circuit diagram of a brake circuit according to one embodiment of the present invention.

FIG. 3 is a circuit diagram of a control circuit according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor 3 Step-down transformer 8 Time limit relay 8a Normally open time limit contact 9 Electromagnetic contactor for supply voltage control 9a Normally open contact 11 Brake coil 16 Ascending operation relay 18 Traveling relay

Claims (1)

(57) [Claims] 1. A passenger conveyor comprising a driving motor, an endlessly arranged step that can be transferred, and a control device that drives the motor by an operation command signal to transfer the step. A power supply means for supplying a power supply for generating a low torque driving force to the electric motor; and a power supply means for supplying electric power from the power supply means to the electric motor after a lapse of a certain period of time after the stop command of the electric motor so as to raise the passenger conveyor. A control device for a passenger conveyor, comprising: control means for providing a low torque driving force.