JPH028108B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a door device for a bus that opens and closes an automatic door provided at the entrance of a passenger bus or the like.

Conventionally, as this type of device, for example,
As shown in Publication No. 13157, a door device for a bus in which the driver operates a door opening/closing switch to open and close the door, and a detection device for a door closing prevention device is provided at the entrance/exit, and when this detection device is activated. It is known that a door closing prevention device is used to forcibly switch the door closing operation to an opening operation, or forcibly maintain the door open state, and when the detection device is activated, the driver This is designed to prevent accidents such as when a passenger attempts to close the door, the door moves and the passenger is thrown out, or the passenger gets caught between the door and the doorway.

However, with conventional devices like this, when the detection device is activated, it simply sounds a buzzer, so ordinary passengers do not fully understand the meaning and leave the detection device activated until a part of their body is stuck in the door. In many cases, people just stay at the boarding gate just to avoid bumping into each other. Therefore, the driver warns the passengers at the boarding gate to proceed from the boarding gate to the inside of the vehicle, but recently there are many one-man buses,
If the driver were to make an in-car announcement each time, it would place a heavy burden on the driver and cause severe fatigue, making it difficult to ensure safety while driving the bus or make quick and correct decisions. There is a problem that has arisen.

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a bus door device that reduces the burden on the driver and ensures safety. According to the invention, this purpose is
A door device for a bus in which a driver operates a door opening/closing switch to open and close the door, and a door closing prevention device detection device is provided at the entrance/exit, and when the detection device is activated, the door closing prevention device prevents the door from closing. In a bus door device that forcibly switches to an opening operation or forcibly maintains the door in an open state, a predetermined warning voice is broadcast to passengers in conjunction with the operation of the detection device. This is achieved by a bus door device that has the following structure.

Hereinafter, details of the present invention will be explained based on illustrated embodiments. The figure shows an electrical circuit diagram of the bus door device according to this embodiment, which includes a door opening/closing switch 1, a door opening/closing control circuit 2, a mat switch 3,
It consists of a door closed position detection switch 4, a relay 5 for operating a broadcasting device, a broadcasting device 6, a buzzer 7, and a solenoid valve coil 8. A +B power source is connected to the control circuit 2, and a door open/close switch 1 and a door closed position detection switch 4 are connected between the +B power source and the circuit 2. The door opening/closing switch 1 is provided near the driver's seat, and the door closing position detection switch 4 is a normally closed switch that is opened only when the door is completely closed, and may be a micro switch, for example, and is located near the entrance/exit. It is attached to the left side wall of the lower step, door holding guide, etc.

One of the two output terminals of the control circuit 2 is connected to the buzzer 7, and the other is connected to the electromagnetic valve coil 8. The buzzer 7 sounds when the door is opened or closed, and is installed at a suitable location inside the bus. Solenoid valve coil 8
is provided in the door drive device even though it is not shown in the drawings, and when the coil 8 is energized, the door is opened via the drive mechanism, and when the coil 8 is demagnetized, the door is closed. A diode 17 connected in parallel to the electromagnetic valve coil 8 in the control circuit 2 is used to protect the coil 8, and functions to absorb a large back electromotive force generated at the moment the coil 8 is demagnetized.

In the control circuit 2, the first relay 11 includes a first switch section 12, a second switch section 13, and a coil section 14.
The fixed contact 12a is a normally closed contact, that is, when the coil portion 14 is not energized, it is a movable contact 12c.
is the contact point to be connected. Also, the second fixed contact 12
b is connected to the +B power supply. Movable contact 12c
is connected to the buzzer 7 mentioned above.

The first fixed contact 13a of the second switch part 13 in the first relay 11 is a normally closed contact, and when the coil part 14 is not energized, the movable contact 13a
c is connected. Further, the first fixed contact 13a is connected to the open side fixed contact 1b of the above-mentioned external door opening/closing switch 1. The movable contact 13c is on the other hand,
It is connected to the electromagnetic valve coil 8 mentioned above. The second fixed contact 13b is connected to the closing side fixed contact 1a of the external door opening/closing switch 1.

The movable contact 1c of the external door opening/closing switch 1 is operated by the bus driver, and the +B power source is selectively connected to the closing fixed contact 1a or the opening fixed contact 1b. The open side fixed contact 1b is further connected to the coil portion 14 of the first relay 11 and is connected to the resistor 15.
grounded through. Further, the coil section 14 is grounded via a capacitor 16.

The control circuit 2 is further provided with a second relay 20, and this relay 20 also connects the first switch section 21 and the second switch section 21.
It consists of a switch part 22 and a coil part 23, and the first fixed contact 21a of the first switch part 21 is a normally closed contact, and when the coil part 23 is not energized, the movable contact 21c is connected. The movable contact 21c is connected to the door closed position detection switch 4 described above. The second fixed contact 21b is connected to one fixed contact 3a of the above-mentioned matte switch 3. The matsu switch 3 is provided on the step of the bus entrance. The other fixed contact 3b of the mat switch 3 is connected via a diode 18 and a resistor 19 in the control circuit 2 to a connection point between the coil section 14 and the capacitor 16 in the first relay 11 described above. The first fixed contact 22a of the second switch section 22 in the second relay 20 is a normally closed contact, and the movable contact 22c is connected when the coil section 23 is not energized. Movable contact 22c
is connected to an external door closed position detection switch 4. Further, the second fixed contact 22b is connected to the coil portion 23 via a diode 24. This coil portion 23 is further connected to the open side fixed contact 1b of the external door opening/closing switch 1 via a diode 25, and the other end is grounded.

The configuration described above is a conventionally known circuit configuration, but according to the present invention, the broadcasting device operating relay 5
and broadcasting device 6 are connected to this. The relay 5 for operating the broadcasting device consists of a switch part 51 and a coil part 52, and the fixed contact 51 of the switch part 51
A is a normally open contact and is separated from the movable contact 51b when the coil portion 52 is not energized. The broadcast device 6 is connected to this fixed contact 51a, while the movable contact 51b is connected to the closing side fixed contact 1a of the door opening/closing switch 1. One end of the coil portion 52 is connected to the other fixed contact 3b of the mat switch 3, and the other end is grounded.

Broadcasting device 6 is, for example, a known tape playback device or a voice synthesis device constituted by a microcomputer, receives a drive signal from relay 5, generates a predetermined audio signal, and supplies it to a built-in speaker. When using a tape playback device, one that plays back endless tapes is preferred. The voice of the broadcasting device 6 is, for example, ``Please take another step up.'' or ``Please do not stand on the step.''

The bus door opening/closing device according to the embodiment of the present invention is constructed as described above, and its operation will be explained next.

The figure shows the state when the door is closed, and it is assumed that in this state the door opening/closing switch 1 is switched from the closed position to the open position. Then, a current of charge flows from the +B power source to the capacitor 16 through the open-side fixed contact 1b of the switch 1 and the coil portion 14 of the first relay 11. The coil section 14 is excited by this current,
The movable contacts 12c, 13 are the second fixed contacts 12b, 1
3b side, current is supplied to the buzzer 7 from the +B power supply through the second fixed contact 12b of the first switch section 12, and the buzzer 7 sounds. In addition, at the moment when the door open/close switch 1 is switched to the open position, the first switch of the second switch section 13 of the first relay 11 is activated.
Current tries to flow through the solenoid valve coil 8 through the fixed contact 13a and the movable contact 13c, but due to the time constant determined by the resistor 15, coils 8, 14, and capacitor 16, and the inertia of the solenoid valve, the solenoid valve Movable contacts 12c, 13c without starting to open the valve.
is switched to the second fixed contacts 12b, 13b side. Therefore, while a current of charge is flowing through the capacitor 16, the door does not move and the door closed position detection switch 4 remains open as shown.

On the other hand, when the door opening/closing switch 1 is switched to the open position, current flows from the +B power supply to the coil section 23 of the second relay 20 through the open-side fixed contact 1b of this switch 1 and the diode 25, and the switch sections 21 and 22 are turned off. The movable contacts 21c and 22c are switched to the second fixed contacts 21b and 22b, but since the door closed position detection switch 4 is still in the open state as described above, no current flows through the movable contacts 21c and 22c.

When the charging current stops flowing to the capacitor 16,
Movable contacts 12c and 13c in the first relay 11
is again switched to the first fixed contacts 12a, 13a side, the buzzer 7 stops sounding, the solenoid valve coil 8 is excited, the drive device is activated, and the door begins to move to the open position. At the same time, the door closed position detection switch 4 is closed, and the voltage from the +B power source is applied to one fixed terminal of the matsu switch 3 through the movable contacts 21c and 22c, which have already been switched to the second fixed contacts 21b and 22b side in the second relay 20. 3
At the same time, a current flows from the +B power source to the diode 24 and the coil section 23. This serves to self-hold the movable contacts 21c, 22c, which have already been switched to the second fixed contacts 21b, 22b, on this contact side. That is, as will be described later, even if the door opening/closing switch 1 is switched to the closed position again and current is no longer supplied through the other diode 25, the second relay 20 will not be activated unless the door is completely closed. is self-maintained in the closed state.

The door is opened as described above, but next, a case will be described in which the door opening/closing switch 1 is switched from the open position to the closed position.

When the switch 1 is turned to the closed position, the capacitor 16 is cut off from the +B power supply, so that the stored charge is discharged and a discharge current flows through the coil section 14 and the resistor 15 in the first relay 11. As a result, the movable contacts 12c, 13c in the first relay 11 are replaced by the second fixed contacts 12b, 1
It is switched to the 3b side and the buzzer 7 starts sounding.
The solenoid valve 8 remains energized, and the door remains stopped at the open position. When the capacitor 16 finishes discharging, the discharge current stops flowing, the movable contacts 12c and 13c in the first relay 11 are switched again to the first fixed contacts 12a and 13a, the buzzer 7 stops sounding, and the electromagnetic valve coil 8 is turned off. Demagnetized. This will cause the door to start closing.

However, if a passenger stands on the step at the entrance/exit, the matsu switch 3 closes, current flows through the diode 18 → resistor 19 → coil section 14 of the first relay 11 → resistor 15, the coil section 14 is energized, and the movable contact 12c and 13c are closed to the second fixed contacts 12b and 13b, the buzzer 7 sounds and the solenoid valve coil 8 is again excited, and the door moves from the closing stroke to the opening stroke. On the other hand, current flows from the +B power source through the mat switch 3 to the coil portion 52 of the broadcasting device operating relay 5, closing the movable contact 51b to the fixed contact 51a. As a result, the +B power supply voltage is supplied to the broadcasting device 6 as a drive signal via the closed-side fixed contact 1a of the door opening/closing switch 1 and the relay 5, and a built-in speaker emits the message "Please move up one more step." ” or “Please do not stand on the steps.” Passengers standing on the steps will hear this, understand the meaning of buzzer 7, and leave immediately. In addition, at this time, the above-mentioned content may be repeatedly broadcast until the passengers leave. When the passenger leaves the step, the mat switch 3 is opened, and the coil section 14 of the first relay 11 and the coil section 52 of the broadcasting device operating relay 5 are cut off from the +B power supply. As a result, the buzzer 7 stops sounding, the electromagnetic valve coil 8 becomes de-energized, the door begins to close again, and the drive signal to the broadcasting device 6 disappears.

The embodiments of the present invention have been described above, but of course the present invention is not limited thereto, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiment, a mat switch is used as a detection device for the door closing prevention device on the step of the entrance/exit, but instead of this, a phototube switch may be provided on both side walls of the step.

In addition, the door opening/closing control circuit 2 in the above embodiment
It also works as part of the door closure prevention device,
Various circuit configurations are possible without being limited to this, and the drive signal for the broadcasting device 6 is also obtained from the closing side fixed contact 1a of the door opening/closing switch 1 by activating the relay 5, but the relay 5 is omitted. , may be obtained directly from the other fixed contact 3b of the mat switch 3.

As described above, in the bus door device of the present invention, a predetermined warning voice is broadcast to passengers in conjunction with the operation of the detection device installed at the entrance/exit, so passengers can easily understand the contents of the warning. This not only allows passengers to get on and off the bus in an orderly manner, making the operation of the bus smoother, but also reduces the burden on the driver, reduces fatigue, allows them to pay more attention to other tasks, and improves safety. improves.

[Brief explanation of drawings]

The figure is an electrical circuit diagram of a bus door device according to an embodiment of the present invention. In the figure, 1...door opening/closing switch, 2...
...Door opening/closing control circuit, 3...Matsuto switch, 4...
...Door closed position detection switch, 5...Relay for operating broadcasting device, 6...Broadcasting device, 8...Solenoid valve coil.

Claims (1)

[Claims] 1 A door device for a bus in which the driver opens and closes the door by operating a door opening/closing switch, which is provided with a door closing prevention device detection device at the entrance and exit, and when the detection device is activated, the door closing prevention device prevents the door from closing. In a bus door device that forcibly switches the operation to an opening operation or forcibly maintains the door in an open state, a predetermined warning voice is broadcast to passengers in conjunction with the operation of the detection device. A bus door device designed to