JPS5912069A - Controller for two-speed man conveyor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field Description] The present invention relates to a control device for a two-speed passenger conveyor with direction-specific speed control.

[Explanation of prior art and its problems]

Recently, with the aim of increasing passenger transportation capacity during morning and evening rush hours on subways, etc., compared to normal times (30m10), v3
Two-speed man conveyors, which can run twice as fast (40 minutes), are rapidly increasing in number. As the user base becomes more diverse, unaccustomed people such as elderly people with weak legs and young children may unknowingly get on a two-speed passenger conveyor while it is running at high speed.

In this case, the person may not be able to keep up with the moving speed of the steps and fall, and especially if the person is descending at high speed, there is a risk that the person may fall to the floor below. In order to prevent this accident, guides are sometimes placed at the entrance and exit during high-speed driving, but this also raises the problem of increased personnel costs. Furthermore, even if the switch can be turned on to high-speed operation only during upper-level operation, a human operator must confirm the status of all switches before starting the man conveyor. In that case, if the vehicle starts descending without realizing that the switch has been switched to high-speed operation, it cannot be said that accidents can be completely prevented.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a control device for a two-speed passenger conveyor that prevents high-speed operation during downward operation due to incorrect operation of the operating direction and speed changeover switch of the two-speed passenger conveyor.

[Summary of the invention]

When the speed selector switch is set to the high speed side, if you select the driving direction selection switch Z in the downward direction, the downward driving relay is energized and the normally closed contact of that relay is opened, allowing high speed driving. prevent the relay from being energized.

[Embodiments of the invention]

The present invention will be explained based on one embodiment shown in the drawings.

FIG. 1 shows a control circuit according to the present invention. The speed changeover switch 10 is a relay 11 for upward operation of the passenger conveyor.
and the normally open contacts 11a and 12 of the descending operation relay 12.
It is connected to the control power supply P via a1. Here, an upward operation relay 11 or a downward operation relay 12 is used as a relay for closing and opening a contactor in order to operate the high-speed or low-speed electric motor that drives the passenger conveyor in the upward or downward direction, respectively.

The low speed side contact of the speed changeover switch 10 is connected to the control power supply N via the normally closed contact 13b of the high speed operation relay 13 and the low speed operation relay 14. The high speed side contact H of the speed changeover switch 10 is connected to the control power source N via the normally closed contact 12b of the descending operation relay 12, the normally closed contact 14b of the low speed operation relay 14, and the high speed operation relay 13. Further, a normally open contact 1282 of the descending operation relay 12 is connected in parallel to the contacts HI and H. Here, a high-speed operation relay 13 or a low-speed operation relay 14 is used as a relay for closing and opening a contactor in order to operate the high-speed or low-speed electric motor of the passenger conveyor at high or low speed, respectively.

The driving direction selection switch 15 is connected to a control power source P via a well-known safety circuit 16. Driving direction selection switch 1
The rising side contact U of No. 5 is connected to the control power source N via the normally closed contact 12b of the descending operation relay 12 and the ascending operation relay 11. The contact on the descending side is relay 1 for ascending operation.
It is connected to the control power supply N via the normally closed contact iib of 1 and the descending operation relay 12.

In addition, relay 1 for rising operation is connected in parallel to contacts U and D.
1 normally open contact 11a! and the normally open point 12as of the descending operation relay 12 are connected in series. The connection point between the intercontact points 11a and 12a3 and the lower terminal of the safety circuit 16 are connected.

Next, the operation will be explained.

Consider a case where the speed changeover switch 10 is turned on to the high speed side (H side) and the driving direction selection switch 15 is turned on to the downward driving side (D side). In this case, the normally closed contact 11b remains closed, and the descending operation relay 12 is energized, and the normally open contact 12a1 is closed, forming a self-holding circuit for the descending operation relay 12.

However, although the normally open contact 12a is closed in the circuit for energizing the high-speed operation relay 13f selected by the speed changeover switch 10, the descending operation relay 13f is selected by the speed changeover switch 10.
The normally closed contact 12b1 opens, and the high-speed operation relay 13 stops excitation. In addition, by closing the normally open contact 12a of the descending operation relay 12, the low-speed operation relay 14 is forcibly closed.
is excited, and the man conveyor is operated downward at low speed. That is, even if the driving direction selection switch 15 is turned to the downward driving side even though the speed changeover switch 10 is turned to the high speed side, the high speed driving relay 13 is not energized and the passenger conveyor descends at low speed. There is a danger that the vehicle may be operated and then driven downward at high speed.

On the other hand, when the speed selector switch 10 is turned on the high speed side for upward operation, and when the speed changeover switch 10 is turned on the low speed side for upward and downward operation, the conveyor operates normally.

[Other Examples]

Furthermore, FIG. 2 shows another embodiment according to the present invention. This embodiment is the normally open contact 12a shown in FIG.

is removed. In this embodiment, even if the speed changeover switch 10 is set to the high speed side, if the driving direction selection switch 15 is turned to the upward driving side, the two-speed man conveyor can move up at high speed, but it will not move to the downward driving side. When it is turned on, the normally closed contact 12b1 is opened, the upward operation is stopped, and the passenger conveyor is started.

〔Effect of the invention〕

Even if the speed selector switch 10 is set to the high speed side,
Depending on the operating direction of the two-speed man conveyor, low-speed operation is performed in the downward direction, and high-speed operation is performed in the upward direction. If the speed selector switch 10 is set to the high speed side and the vehicle is in the descending mode, the passenger conveyor may not be activated. Therefore, the danger of causing the passenger conveyor to descend at high speed due to human error can be completely eliminated.

[Brief explanation of the drawing]

FIG. 1 is a control circuit diagram of a two-speed passenger conveyor according to the present invention, and FIG. 2 is a partial control circuit diagram showing another embodiment.

Claims (1)

[Claims] A two-speed man conveyor comprising a speed changeover switch for switching between low speed and high speed, a driving direction selection switch for selecting an ascending and descending direction, and a circuit that prevents high-speed operation when the descending direction of the driving direction selection switch is selected. Conveyor control device.