JPH0355393B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a device for operating an escalator on which a wheelchair can be placed.

[Conventional technology]

Escalators, along with elevators, have become an essential means of vertical transportation within buildings.

However, only healthy people can use escalators without any problems, and escalators are not necessarily a convenient means of transportation for wheelchair users. Wheelchair users who have difficulty moving forward and backward with their fingers are the ones who
Ensuring that escalators can be used safely is a necessity for social welfare.

Therefore, various proposals have been made to enable even wheelchair users to ride escalators with peace of mind. The reason why a wheelchair cannot ride on the steps of an escalator is because the depth of the steps is insufficient for the wheelchair, and an improvement on this point is shown in, for example, Japanese Patent Application Laid-Open No. 7685/1985. .

Figures 2 and 3 show this.
Reference numeral 1 denotes a treadle, to which a front wheel 1A and a rear wheel 1B are attached. 2 is also a treadle, and similarly a front wheel and a rear wheel (both not shown) are attached thereto, and an auxiliary treadle 2C that coincides with the top surface of the treadle 2 is housed on its upper surface.
3 is a support fixed to the lower surface of the auxiliary step board 2C and has a roller 4 attached to its lower end; 5A and 5B are step rails that guide the front wheel 1A and the rear wheel 1B, respectively;
Reference numeral 6 indicates an auxiliary step rail that engages with the roller 4 to raise it, and 7 indicates a wheelchair that is ridden astride the auxiliary step 2C and the step board 1. One or more steps 2 having auxiliary steps 2C are inserted into all the steps.

That is, when the roller 4 engages with the auxiliary step rail 6, the auxiliary step 2C rises via the support 3, and its upper surface becomes the same horizontal plane as the upper surface of the step 1. As a result, the depth dimension of the top surface of the steps increases, so that the wheelchair 7 can be easily placed thereon.

Furthermore, a method has been proposed that limits this to only when transporting a wheelchair (hereinafter referred to as "wheelchair operation"), and this will be explained with reference to FIG.

In the figure, 8 is the lower floor, 9 is the upper floor, 10 to 12 are specific steps, and 13 is a drive device installed on the specific steps 10 to 12. An auxiliary step 10X that is raised by a device 13 is housed. 14 is auxiliary step 10
Car stopper installed at X, 15 for wheelchair users,
16 is a staff member.

That is, assume that a wheelchair user 15 is guided by an attendant 16 to the lower floor 8. When the staff member 16 operates a wheelchair operation switch (not shown), the escalator automatically stops when the specific steps 10 to 12 reach the platform on the lower floor 8. At this time, specific step 1
The upper surfaces of the wheelchairs 0 to 12 are on the same plane, and a space for the wheelchair 7 to be placed is secured. with this,
Wheelchair 7 gets on specific steps 10 to 12. When the attendant 16 presses a start button (not shown), the vehicle stopper 14 protrudes to prevent the wheelchair 7 from moving backward.
Next, the escalator ascends, but at this time, the driving device 13 moves the auxiliary step 10X of the specific step 10.
gradually rises and always forms the same plane as the upper surface of the specific step 11 in front of it. During this time, specific steps 1
2 is inclined toward the front side to the extent that it does not contact the foot rest part of the wheelchair 7.

The escalator now ascends at half the normal escalator speed, and when the specific steps 10 to 12 reach the upper floor 9, the escalator stops, the car stopper 14 is retracted, the specific step 12 becomes horizontal again, and the specific step 1
The upper surfaces of 0 to 12 are on the same plane. The wheelchair 7 can now descend to the upper floor 9. After the wheelchair 7 gets off, if the wheelchair operation switch is operated, the escalator returns to its normal state. Note that the same applies to downhill driving.

[Problem that the invention seeks to solve]

Transporting the wheelchair 7 by the conventional escalator as described above is more useful when the height is higher. However, if the escalator stops due to a power outage during the wheelchair operation, it will be difficult to deal with the wheelchair 7 and its user 15. That is, when the escalator stops, it is necessary to carry up the user 15 along with the wheelchair 7, but there is a problem in that this becomes extremely difficult in the case of a high escalator.

However, escalators do not trap passengers inside the car like elevators do during power outages.
Since escalators can be used as stairs, no attention has been paid to the emergency operation of escalators during power outages. Therefore, it can be said that the above-mentioned problems when driving in a wheelchair were overlooked.

This invention was made to solve the above-mentioned problems, and allows operation even in the event of an AC power outage, and allows the wheelchair and its user to be easily dropped off at the boarding/disembarkation area without having to lift the wheelchair or its user manually. The object of the present invention is to provide a driving device for such a wheelchair escalator.

[Means for solving problems]

The operating device for a wheelchair escalator according to the present invention converts the DC power of a battery into AC using an inverter in the event of an AC power outage, and uses this AC to drive an induction motor to operate the escalator. be.

[Effect]

In this invention, even during a power outage of AC power,
Switch to an inverter and drive an escalator with a wheelchair on it.

〔Example〕

FIG. 1 is a circuit diagram showing one embodiment of the present invention, and is used together with FIG. 4 of a conventional device.

In the figure, R, S, and T are three-phase AC power supplies, 20 is a direction switching circuit consisting of contacts for switching AC power supplies R and S, 21 is a three-phase induction motor connected to the direction switching circuit 20 and drives the escalator, and 22 is a A charging circuit connected to AC power supplies R, S, and T and forming a three-phase full-wave rectifier circuit using thyristors; 23 a battery connected to the DC side of the charging circuit 22; 24 a battery 2;
The inverter is connected to the motor 21, and is composed of three sets of transistors connected in series, two each, and diodes connected in parallel to each of these transistors, and the AC side is connected to the motor 21. 25 is the wheelchair operation switch, 26
27, 27a to 27c, and 27d to 27f are switching circuits, which are connected to AC power supplies R and S in this embodiment. The electromagnetic contactor 27 for power failure detection, its normally open contacts 27a to 27c, and its normally closed contacts 27d to
27f is used. The contacts 27a to 27c are inserted between the direction switching circuit 20 and the electric motor 21,
Contact points 27d to 27f are connected to the inverter 24 and the electric motor 2.
It is inserted between 1.

Next, the operation of this embodiment will be explained.

When the AC power supplies R, S, and T are normal, the power failure detection electromagnetic contactor 27 is energized, the contacts 27a to 27c are closed, and the contacts 27d to 27f are open.

When the driving direction of the escalator is set and the start button is pressed, the direction switching circuit 20 switches the AC power supplies R and S according to the direction. The electric motor 21 is now driven in the direction commanded by the output of the direction switching circuit 20, and the escalator moves up or down. Now, the wheelchair driving described in FIG. 4 can be performed as necessary.

On the other hand, the charging circuit 22 converts three-phase alternating current into direct current to charge the battery 23. The charging voltage is controlled by a control circuit 26.

Assume that you are currently driving in a wheelchair, and that AC power supplies R, S, and T experience a power outage while you are driving.

The electromagnetic contactor 27 for power outage is deenergized, and the contact 27a
~27c are open, and contacts 27d~27f are closed. The electric motor 21 is now disconnected from the direction switching circuit 20 and connected to the inverter 24. The DC power of the battery 23 is converted into AC power by the inverter 24 and supplied to the electric motor 21, so that the escalator continues to operate. At this time, since the wheelchair operation switch 25 is closed, the transistor of the inverter 24 is controlled by the control circuit. If the inverter 24 is controlled by pulse width modulation, its output will be an approximate sine wave, which is desirable. However, such operation is extremely rare, and it is acceptable even if the ride quality and noise are slightly worse than normal operation, so even a simple 6-pulse (square wave current) method is not useful in practice. be.

Note that the rotation direction of the electric motor 21 is determined by the inverter 2.
It is determined by the phase sequence of the outputs of No. 4, and the operating direction of the escalator can be either upward or downward.
However, because the capacity of the battery 23 is smaller when the load is lowered due to the influence of the load, the inverter 24
It is preferable to set the phase order of the outputs to the phase order necessary for the motor 21 to rotate in the case of descending operation.

By driving in this manner, the wheelchair user 15 can return to the lower floor 8 and get off the escalator.

Although the embodiment has been described as being applied to an escalator as shown in FIG. 4, it is obvious that the present invention can be similarly applied to any device having a device for placing the wheelchair 7 on the steps.

〔Effect of the invention〕

As described above, in this invention, in the event of an AC power outage, the DC power of the battery is converted to DC using an inverter, and this AC is used to drive the induction motor to operate the escalator. Even if this occurs, the wheelchair user can be easily rescued without having to be carried up manually.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a wheelchair escalator operating device according to the present invention, FIG. 2 is a side view of main parts of a conventional wheelchair escalator, and FIG. 3 is a perspective view of FIG. FIG. 4 is a side view showing a conventional wheelchair escalator and a wheelchair escalator according to the present invention. In the diagram, R, S, and T are three-phase AC power supplies, 7 is a wheelchair, 10 to 12 are specific steps, 10X is an auxiliary step,
21 is a three-phase induction motor, 23 is a battery, 24 is an inverter, and 27, 27a to 27f are switching circuits (magnetic contactor and contacts for power failure detection). Note that the same reference numerals in the figures indicate the same parts.

Claims (1)

[Scope of Claims] 1. A device having a device for placing a wheelchair on a step, the step being driven in an upward or downward direction by an induction motor connected to an AC power source, comprising: a battery for supplying DC power; An operating device for a wheelchair escalator, comprising: an inverter that converts the DC power to AC power; and a switching device that switches the motor from the AC power supply to the inverter when the AC power supply is out of power. 2. The operating device for a wheelchair escalator according to claim 1, wherein the treadle is operated in the downward direction by the battery and the inverter.