JPH07228248A - Opening closing device for door of electric car - Google Patents

Abstract

PURPOSE:To perform smooth drive so that unreasonable force is exerted on a door of an electric car and obviate the need for fine adjustment. CONSTITUTION:A linear motor comprising a stator coil 2 and a rotor 3 is arranged in a frame 1 and a door 6 is mounted on the rotor 3 through a drive arm 8 and a coupling 5. By controlling a current with which the stator coil 2 and the rotor 3 are charged, the rotor 3 is moved in parallel to the stator coil 2 and the door 6 attached to the rotor 3 is smoothly driven and a defect by a pressure air type drive like a conventional type is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a train door opening / closing device.

[0002]

2. Description of the Related Art FIG. 3 is a schematic view showing a conventional example of this type. That is, as shown in FIG. 3A, the door 25 is provided between the upper rail 26 and the lower rail 27, and the door is opened and closed by the door fastening mechanism 28. This door tightening mechanism 28 uses compressed air as a power source, and
As shown in (b), the reciprocating motion of the air cylinder and the piston 281 is controlled by the semicircular rack and pinion gear 282 and the link joint 2.
The opening / closing operation is converted by 83 to open / close the door.

An example of the control unit is shown in FIG. That is, it is composed of an electromagnetic valve 31, a throttle valve 32, a ball valve 33, and the like, and basically, by turning on and off the electromagnetic valve 31, the air in the cylinder chamber (large cylinder) 36 in which the large piston 34 of FIG. The piston is reciprocated by discharging air or supplying air with a constant pressure. As shown in the figure, by arranging the small piston 35 and the large piston 34, the cylinder working cross-sectional area is different even for air of the same pressure, so when the solenoid valve excitation is turned off, the pressure air enters the large cylinder chamber, Then, the pistons 34 and 35 move from right to left. In addition, by preparing two ball valves 33 and throttle sensors 32, the exhaust amount and the air supply amount are controlled by the relationship between the positions of the two exhaust holes and the cylinder, and the speed at the binding end and opening end of the door is buffered. It is supposed to do. In addition,
Such a drive system will be referred to as a pneumatic drive here.

[0004]

However, the conventional device has the following problems. (1) With the configuration as shown in FIG. 3, not only the required horizontal thrust is applied to the door body, but also a strong force is exerted in an unnecessary direction diagonally upward, which makes it impossible for the door suspension vehicle or the upper rail. In many cases, a large amount of force is applied to cause a displacement between the mounting positions of the both and abnormal friction, and in particular, fine adjustment of the wheel mounting shaft position becomes very troublesome. (2) In the case where the thrust adjustment and speed adjustment for opening and closing the door are performed as shown in FIG. 4, not only is a dedicated accessory device required, but also a work delay is inevitably made, and it is difficult to perform a fine and agile operation. .

(3) Not only the door tightening mechanism, ancillary equipment, piping, etc. are required for each door, but the number of parts is increased, and since these are repeatedly and frequently operated, fatigue and wear of each part are required. There is a high possibility that problems such as backlash and air leak will occur, and maintenance and inspection will become a major problem. Therefore, an object of the present invention is to eliminate the need for difficult fine adjustment by preventing excessive force from acting on the train door, and to prevent work delay by stopping the pneumatic drive, and to perform fine and agile operation. Is to enable.

[0006]

In order to solve such a problem, according to the present invention, a linear motor, which is composed of a stator coil and a mover and is mechanically coupled to a train door, and electric power is supplied to the linear motor. An electric power converter for supplying, a control circuit for controlling the linear motor by controlling the electric power converter, and an emergency power supply means for supplying power to the power converter in an emergency are provided. The door for a train can be driven only in one direction, and when the power to the power converter is cut off, power is supplied from the emergency power supply means to enable opening and closing of the train door. It has a feature.

[0007]

By operating the train door with a linear motor, an unreasonable force does not act on the train door. Even if the power is cut off for some reason, the train door can be opened and closed.

[0008]

1 is a perspective view showing an embodiment of the present invention. As shown in the figure, the stator coil 2 and the mover 3
A linear motor consisting of
Here, the lid 4 is opened and pulled out so that the linear motor can be seen. The door 6 is attached to the mover 3 of the linear motor,
It is attached via the drive arm 8 and the joint 5 and is movable in parallel with the rail 9. In addition, 7
Indicates a door hanging metal fitting of the door 6.

In such a structure, the stator coil 2
By controlling the current flowing through the mover 3 and the mover 3, the mover 3 moves in parallel to the stator coil 2, so that the door 6 can be moved along the rails 9, whereby the opening / closing operation of the door 6 can be performed. Will be possible. At this time, since a force only in the horizontal direction acts between the stator coil 2 and the mover 3 and unnecessary force does not act in the vertical direction or the diagonal direction, there is a problem such as displacement of the mounting position or abrasion. Does not occur.

FIG. 2 shows a control unit of the linear motor. 11
Is a DC power supply, 12 is a capacitor, 13 is an inverter, 1
4 is a linear motor, 15 is an encoder, 16 is a current detector, 17 is a magnetic pole / speed / position detector, 18 is a current controller (ACR), 19 is a speed controller (ASR), and 20 is a position / speed pattern command. Container, 21 is a parameter setting device, 22
Is an interface and 23 is an external signal.

That is, the linear motor 14 is driven by the inverter 13. AS for the inverter 13
The speed control system by R19 is used as a media loop, and the minor loop is provided with a current control system by ACR 18, and the switching element in the inverter 13 is controlled by this ACR 18, for example, pulse width modulation (PWM). In this control, the magnetic pole / speed / position detector 17 detects the magnetic pole position, speed, or mover (door) position from the output of the encoder 15, and outputs the outputs to the ACR 18 and ACR, respectively.
It is given to the SR 19 and the position / speed pattern commander 20.

In the position / speed pattern command unit 20, a driving operation command given as an external signal 23 through the interface 22 is used as a speed based on the output from the parameter setting unit 21 and the output from the magnetic pole / speed / position detector 17. It is given as a command and given to the ASR 19. The ASR 19 performs a predetermined adjustment calculation so that the speed signal from the magnetic pole / speed / position detector 17 matches the speed command from the position / speed pattern commander 20, while the ACR 18 causes the ACR 18 to
The output from the SR 19 is used as a current command, and a predetermined adjustment calculation is performed so that the actual current value detected by the current detector 16 becomes equal to this command value. The position-speed pattern of the position / speed pattern command unit 20 can be arbitrarily set.

The capacitor 12 accumulates the electric power from the DC power supply 11 when the door is closed, that is, when the linear motor is not operating (while the train is running), and the DC power supply 11 is caused for some reason.
Is cut off, the inverter 1
I am trying to give it to 3. Therefore, the capacitor 1
By properly selecting the capacity of 2, the door can be opened and closed as many times as necessary even in the event of an abnormality. Although the opening and closing of the train door has been mainly described above, the present invention can be applied to other traversing doors similar to the above in the same manner as described above.

[0014]

According to the present invention, since the train door is driven by the linear motor, an unreasonable force does not act on the train door, which makes difficult installation work and complicated adjustment work unnecessary. be able to. Further, since the emergency power source is secured, there is an advantage that the train door can be opened and closed a certain number of times even if the power source is cut off for some reason.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a block diagram showing an example of a control circuit of FIG.

FIG. 3 is an explanatory diagram for explaining a conventional example.

FIG. 4 is a block diagram showing an example of the control circuit of FIG.

[Explanation of symbols]

1 ... Frame, 2 ... Stator coil, 3 ... Mover, 4 ...
Lid, 5 ... Joint, 6, 25 ... Door, 7 ... Door hanging metal fitting, 8 ... Drive arm, 9 ... Rail, 11 ... DC power supply, 12 ... Condenser battery, 13 ... Inverter, 14 ... Linear motor, 15 ... Encoder, 16 ... Current detector, 17 ... Magnetic pole / speed / position detector, 18 ... Current regulator (ACR), 1
9 ... Speed controller (ASR), 20 ... Position / speed pattern commander, 21 ... Parameter setting device, 22 ... Interface, 23 ... External signal, 26 ... Upper rail, 27 ... Lower rail, 28 ... Door stop mechanism, 31 ... Electromagnetic valve, 32 ... Throttle sensor, 33 ... Ball valve, 34 ... Large piston, 35 ... Small piston, 36 ... Large cylinder, 37 ... Small cylinder.

Front page continued (72) Inventor Yoshihiko Okuyama 1-1 Tanabe Shinden, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Electric Co., Ltd. Electric Co., Ltd.

Claims (1)

[Claims] 1. A linear motor comprising a stator coil and a mover and mechanically coupled to a train door, a power converter for supplying power to the linear motor, and a power converter for controlling the power converter. A control circuit for controlling the linear motor and an emergency power supply means for supplying power to the power converter in an emergency are provided, and the linear motor can drive the train door in only one direction, and the power A train door opening / closing device, characterized in that, when power to the converter is cut off, power is supplied from the emergency power supply means to enable opening / closing of the train door.