JP2000086139A - Speed controller for passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent passengers and baggage from coming into collision with the lower end part of the ceiling of a building or the upper end part of an adjacent passenger conveyor and being caught by them, by detecting an article protruding outside a handrail, and gradually-reducing the speed command of the control part of a power converter based on the detected signals, so as to conduct deceleration control. SOLUTION: A power converter 15 is provided with an inverter 15-1 and a converter 15-2 constituted of a semiconductor device, thereby providing power supplied by a power source 16 to a motor 1 as power of variable voltage and variable frequency. A control part 18 is provided with a speed control part 20 and a PWM control part 19 for pulse width modulation of variable voltage and variable frequency, thereby controlling an inverter 15-1 through a base circuit 17 for controlling the speed of the motor 1. The detected signal 22 from an article protrusion detector 21 is inputted into the speed control part 20 of the control part 18, so as to conduct speed control. The control part 18 gradually reduces the speed command and gives warning announcement. It is thus possible to decelerate a passenger conveyor and stop it before reaching the lower end part of a ceiling for braking.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed control device for a passenger conveyor, and more particularly to a control for improving passenger safety.

[0002]

2. Description of the Related Art When objects such as luggage or a passenger's body are protruding from a handrail when a conventional passenger conveyor is driven in an ascending direction, a collision with a lower end of a ceiling or a lower end of an adjacent passenger conveyor may occur. In order to avoid the risk of being caught, the triangular guard is lowered for safety.

[0003]

Since the structure of the escalator is close to moving and fixed, it is the best way for passengers to observe safety rules on their own. However, due to carelessness, passengers or luggage may cross the handrail and hit the lower edge of the ceiling or the lower edge of the adjacent passenger conveyor and collide with the triangular guard to avoid the risk of being caught or pinched. There is a danger that a collision or a pinch accident may occur at the lower end of the vehicle or at the lower end of the adjacent passenger conveyor. In addition, if an emergency stop is performed to avoid the danger of collision or being caught, there is a problem that other passengers may fall unexpectedly and have an unstable posture because they are not expected.

[0004] It is an object of the present invention to provide a passenger conveyor speed control device for preventing a collision from being caught or caught by the lower end of a ceiling or the lower end of an adjacent passenger conveyor, thereby preventing the passenger from overturning.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention moves endlessly via a gear and a chain by a driving device comprising an electric motor and a power converter for supplying electric power to the electric motor. In a passenger conveyor having a plurality of steps, a plurality of safety devices, and a handrail, an object pop-up detector that detects that an object has popped out of the handrail, and the detection signal of the object pop-up detector detects the power of the power converter. The speed control unit controls the deceleration speed by gradually reducing the speed command of the control unit.

A passenger having a plurality of steps, a plurality of safety devices, and a handrail, which are connected and moved endlessly through gears and a chain by a driving device comprising an electric motor and a power converter for supplying electric power to the electric motor. On a conveyor, an object jumping detector for detecting that an object jumps out of the handrail, a speed command of a control unit of the power converter is gradually reduced by a detection signal of the object jumping detector to control deceleration / stop speed. After that, the stop is held by the brake.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a passenger conveyor speed control device according to the present invention will be described below with reference to FIGS.

FIG. 1 is a side view of a passenger conveyor according to the present invention, and FIG. 2 is a front view of the passenger conveyor according to the present invention.

In FIGS. 1 and 2, reference numeral 1 denotes an electric motor, which transmits the rotational force of an electric motor pulley 3 to a speed reducer input pulley 5 of a speed reducer 2 via a belt 4. Rotational force is generated by a gear (not shown) of the speed reducer 2, a speed reducer output pulley 6, a chain 7, an upper gear 8,
It is transmitted to the chain 9 that is hung on the upper gear 8 and the lower gear 10 to drive the step 11, and also drives the handrail 12 in synchronization with the movement of the step 11. For example, at the time of ascending direction driving, step 11, the handrail 12 moves to the arrow. When the passenger 14 is in a posture of jumping out of the handrail 12 and driving in the ascending direction, the object jumping out detector 21 detects when approaching the lower end of the ceiling because the passenger 14 is driving in the ascending direction.

FIG. 3 is a diagram of a speed control device for a passenger conveyor according to the present invention, showing an enlarged control device for supplying power to the electric motor 1 and controlling the speed. The power converter 15 includes an inverter 15-1 and a converter 15-2 composed of semiconductor elements, and supplies the electric power received from the power supply 16 to the electric motor 1 with variable voltage and variable frequency power.

The control unit 18 is a PWM control unit 1 that performs pulse width modulation (PWM) of a variable voltage variable frequency with a speed control unit 20.
9, the speed control of the electric motor 1 is performed by controlling the inverter 15-1 via a base circuit 17 with a pulse width modulation command having a variable voltage and a variable frequency.

That is, the speed controller 2 of the controller 18
To 0, the detection signal 22 of the above-mentioned object pop-out detector 21 is given to control the speed.

FIG. 4 is a chart diagram of a passenger conveyor speed control method according to the present invention, and explains the operation of the present invention. Now, when the passenger 14 is in a posture in which the passenger 14 has jumped out of the handrail 12 while the passenger is moving upward at the passenger conveyor speed 25, the vehicle approaches the lower end of the ceiling, and the object jumping detector 21 detects the object jumping detection. Generate signal 22. The object pop-out detection signal 22 is input to the control unit 18 and the speed command 2
At the same time, a caution announcement 23 is made. The passenger conveyor speed 25 is reduced as the speed command gradually decreases, stops before reaching the point P on the lower end of the ceiling, and the brake 26 operates to stop and hold. Passengers do not collide or get caught in the lower end of the ceiling and decelerate and stop quietly, so that other passengers can secure sufficient safety.

FIG. 5 is a chart diagram of another speed control method of the passenger conveyor according to the present invention, and explains the operation of the present invention.
Now, when the passenger rides in a position where the passenger is traveling upward at the passenger conveyor speed 25, and the passenger 14 is in the attitude of jumping out of the handrail 12, it approaches the lower end of the ceiling and the object jumping detector 21 detects the object jumping out. A detection signal 22 is generated. The object pop-out detection signal 22 is input to the speed control unit 20 of the control unit 18, and the speed command 24 is gradually reduced, and at the same time, a caution announcement 23 is made. The passenger conveyor speed 25 decreases as the speed command 24 gradually decreases. At this time, when the passenger stops the attitude in which the passenger 14 jumps out of the handrail 12 in the caution announcement 23, the object jump detection signal 22 disappears, the speed command gradually increases, the speed becomes steady again, and the vehicle continues traveling, and the customer is enabled. Available to The increase or decrease in the speed at this time can be made gradual without giving the passenger discomfort.

[0015]

As described above, according to the present invention, it is possible to avoid the danger of passengers and luggage being inadvertently colliding or being caught by the lower end of the ceiling or the lower end of the adjacent passenger conveyor over the handrail. Can be.

[Brief description of the drawings]

FIG. 1 is a side view of a passenger conveyor according to the present invention.

FIG. 2 is a front view of the passenger conveyor according to the present invention.

FIG. 3 is a diagram of a passenger conveyor speed control device according to the present invention.

FIG. 4 is a chart diagram of a passenger conveyor speed control method according to the present invention.

FIG. 5 is a chart diagram of another speed control method of the passenger conveyor according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor 2 Reduction gear 3 Motor pulley 4 Belt 5 Reduction gear input pulley 6 Reduction gear output pulley 7 Chain 8 Upper gear 9 Step chain 10 Lower gear 11 Step 12 Hand rail 13 Lower end of ceiling or passenger conveyor 14 Projecting object 15 Power conversion 15-1 Inverter 15-2 Converter 16 Power supply 17 Base circuit 18 Control unit 19 PWM control unit 20 Speed control unit 21 Object pop-out detector 22 Object pop-up detection signal 23 Attention announcement 24 Speed command 25 Passenger conveyor speed 26 Braking operation 27 Brake 28 control device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshio Meguro 1-6-6 Kanda Nishikicho, Chiyoda-ku, Tokyo, Japan Inside the Hitachi Building System Co., Ltd. (72) Yoshio Matsuzaki 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo, Japan F term in Hitachi Building Systems, Ltd. (reference) 3F321 DA05 DD02 DD05 EA01 EB07 FA12 FA15 FB17 GA31

Claims (5)

[Claims] 1. A passenger having a plurality of steps, a plurality of safety devices, and a handrail which are connected and moved endlessly via a gear and a chain by a driving device comprising an electric motor and a power converter for supplying electric power to the electric motor. On the conveyor
An object pop-up detector that detects that an object pops out of the handrail, a speed control unit that gradually reduces a speed command of a control unit of the power converter with a detection signal of the object pop-out detector and controls a deceleration speed. A speed control device for a passenger conveyor, wherein the speed control device is configured. 2. A passenger having a plurality of steps, a plurality of safety devices, and a handrail which are connected and moved endlessly via a gear and a chain by a driving device comprising an electric motor and a power converter for supplying electric power to the electric motor. On the conveyor
After the object jumping detector that detects that the object jumps out of the handrail, the speed command of the control unit of the power converter is gradually reduced by a detection signal of the object jumping detector to control the deceleration / stop speed, A passenger conveyor speed control device characterized by being stopped and held by a brake. 3. The object pop-up detector detects that a pop-out object approaches at least the lower end of the ceiling or the vicinity of the lower end of the passenger conveyor.
The passenger conveyor speed control device according to claim 2. 4. The passenger conveyor speed control device according to claim 1, wherein the object pop-up detector is installed on an outer deck of the passenger conveyor. 5. The passenger conveyor speed control device according to claim 1, wherein the object pop-up detector is installed at a lower end of the ceiling or a lower end of the passenger conveyor.