JPS585563B2 - Automatic stop device for self-propelled electric trolley - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a self-propelled electric bogie that receives power from a feeder line on a track and travels on a track, and when a following bogie collides with a leading bogie on the track. This invention relates to an automatic stop device that stops a following truck.

A transport device using self-propelled electric trolleys is a device that allows multiple trolleys to run on a laid running track based on their own destination command, and the running track is connected to a contactor connected to a power supply contact wire. A control section that controls stopping and starting of the bogie by turning ON and OFF, and a control section in which the power is OFF regardless of whether it is moving forward or backward.
It consists of an uncontrolled section in which the bogies are always running, except when there are suspensions due to unforeseen circumstances.

There are two types of sections, controlled and uncontrolled, but in the controlled section, the following bogie that collides with the leading bogie must be stopped until the preceding bogie starts, and in the uncontrolled section, there is no control between each bogie. Due to variations in running speed, the following bogie may collide with the preceding bogie. In this case, the following bogie is stopped and the leading bogie is allowed to run without stopping, thereby allowing a certain distance between the bogies. must be maintained.

Conventionally, as shown in Fig. 1, automatic stopping devices in the event of a rear-end collision between carts are always spaced apart from each other on the front and rear surfaces of the cart 1, but when the carts collide with each other, an external force is applied. Tape switches 02A and 02B made of a pair of conductive tapes that come into contact when the vehicle is touched are attached, and these tape switches 02A and 02B are installed inside the truck respectively and inserted and connected to the drive circuits of the rear-end collision detection relays 06 and 07. 06,
07 controls the contactor 9 for driving the electric motor M.

Rear-end collision detection relays 06 and 07 operate by discriminating the polarity of power supply contact wires 5 and 6.

That is, when the trolley wire 5 has positive polarity and the contact wire 6 has negative polarity and the trolley 1 runs in the direction of arrow A, the relay 07 operates, the polarity of the contact wires 5 and 6 is reversed, and the trolley 1 moves in the direction of the arrow. B
When traveling in the direction, relay 06 operates.

Now, if the bogie 1 runs in the direction of arrow A and collides with the preceding bogie, the tape switch 02A closes, the relay 07 operates, its b contact 07b opens, the contactor 9 becomes inoperable, and the electric motor The drive circuit of M is cut off, and the trolley 1 stops.

When the truck 1 is rear-ended by a following truck, the tape switch 02B is closed, but the relay 06 is not activated, so the truck 1 continues to run without stopping.

Therefore, with this configuration, it is possible to automatically stop the truck that has collided with the vehicle from behind.

However, such a conventional device has the disadvantage that the tape switch used therein is structurally prone to malfunction and requires two direction discrimination relays 060T.

An object of the present invention is to provide an automatic stopping device for a self-propelled electric cart in an electric transport device that can eliminate these conventional drawbacks, ensure reliable automatic stopping operation, and has a simple configuration. purpose.

To explain the present invention in detail with reference to one embodiment shown in the drawings, in FIG. 2, 1A is the following bogie that is to be stopped in case of a rear-end collision, 1B is the leading bogie, and 3A and 3B are attached to the front of each bogie and the leading bogie is attached to the front of each bogie. A conductive collision detector that also serves as a buffer (bumper) to connect the motor circuits in the front and rear trucks, which will be described later, in the event of a rear-end collision with a truck; 4A and 4B are similar collision detectors attached to the rear surface of the truck; 5 and 6 are power supply contact wires, 7A, 8A and 7B, 8B are current collectors 9A,
9B is a bipolar current collector, an electromagnetic contactor for controlling the drive circuit of the motor M, which is interposed between 7A, 8A, and 7B8B, and when energized, the opening/closing contact 9a connected to the motor drive circuit
It closes and opens when the power is turned off.

10A, 10B, 10'A, 10'B are electromagnetic contactors 9A
, 9B, a current limiting resistor connected in series to both ends of the 11A,
12A, 11B, 12B are diodes. Detectors 3A, 4A, 3B, 4B are connected to current collectors 7A, 8A, 7B, 8B through diodes 11A, 12A and 11B, 12B, respectively, as shown in the figure. Connection points between the detection body and the diode are respectively connected to connection points between the resistor and the contactor.

In the above configuration, when the contact wire 5 is the positive electrode, the current collectors 7A and 7B are connected to the diodes 11A and 11 in each trolley.
It is connected to the detection body 4A4B at the rear of the truck via B.

When the following truck 1A rear-ends the preceding truck 1B, the detection bodies 3A and 4B come into contact.

At this time, each trolley moves from contact wire 5 (positive) to current collector 7A (
7B) → Diode 11A (11B) → Contactor 9A (9
B) → Resistor 10'A (10'B) → Current collector 8A (8B)
→Contactors 9A and 9B (operate with bipolarity) in the contact wire 6 (negative) circuit.

) is excited, and the electric motor M is energized by its contacts 9Aa and 9Ba.
The vehicle is running with the drive circuit closed.

Due to the contact between the detection bodies 3A and 4B, the trolleys IA and IB are electrically connected, and the current collector 7B of the trolley 1B → the diode 11
B → Detector 4B → Detector 3A of trolley 1A → Resistor 10'A
→Current will start flowing in the current collector 8A circuit.

As a result, the current in the contactor 9A of the truck 1A is bypassed by the circuit described above, and the contactor 9A becomes inoperable with both ends short-circuited, and its contact 9Aa is opened to cut off the drive circuit of the motor MA. do.

This causes the bogie 1A to stop.

The leading bogie 1B is not affected by this and continues to run as it is.

As a result, if both carts separate, the contactor 9 in cart 1A
Since the short circuit of A is released, the contact body 9A operates again,
The drive circuit of the electric motor MA is closed, and the truck 1A also starts moving again.

When the polarity of the contact wires 5 and 6 is reversed, the cart 1A1B runs in the opposite direction to the front, and the relationship between the carts 1A and 1B is reversed, with the cart 1A becoming the leading cart and the cart 1B becoming the following cart.

At this time, when the truck 1B rear-ends the truck 1A and the detection bodies 4B and 3A come into contact, the contactor 9B in the truck 1B connects the current collector 8A of the truck 1A → the diode 12A → the detection body 3.
A → Sensing object 4B on trolley 1B → Resistor 10B → Current collector 7
B is short-circuited, the drive circuit of the electric motor MB of the following bogie 1B is cut off, and this bogie 1B stops.

Note that if the contactor 9 is configured to perform a delayed operation when it is turned on, or if it is operated via a delay circuit, the following bogie can be restarted after the leading bogie has moved away by a predetermined distance after a collision. This makes it possible to avoid another rear-end collision.

In the embodiment described above, an electromagnetic contactor for opening and closing the circuit is interposed in the drive circuit of the motor for driving the cart, but in the present invention, the electromagnetic contactor can be omitted as shown in FIG. .

The embodiment shown in FIG. 3 differs from the embodiment shown in FIG. 2 only in that the electromagnetic contactors 9A and 9B are removed, so each component in FIG. 3 is designated by the same reference numeral as in FIG. 2. .

In the embodiment shown in FIG. 3, when a voltage is applied to the trolley power supply lines 5 and 6 so that the power supply line 5 side is positive, in the trolleys IA and IB, the current collector 7A (7B) → the diode 11A (1
1B) → Electric motor MA (MB) → Resistor 10'A (10'B
) → Current flows in the circuit of current collector 8A (8B), and motor M
A (MB) is driven, and the trolley 1A (1B) travels in the direction of arrow A.

Then, when the following truck 1A rear-ends the preceding truck 1B and the detector 3A of the truck 1A and the detector 4B of the truck 1B come into contact, the current collector 7B→diode 11B→ Detector 4B → Detector 3A → Resistor 10'A →
A circuit for the current collector 8A is formed, and this circuit causes the trolley 1A to
The drive circuit of the motor MA in is bypassed, and the drive circuit of the motor MA in
appears to be short-circuited and stops.

Therefore, the trolley 1A stops. Since the motor drive circuit on the preceding bogie 1B side is kept alive, this bogie 1B
continues running.

As a result, the detection objects 3A and 4B are separated from each other, and the trolley 1A
Since the bypass of the motor drive circuit at is released, the motor MA is driven again, and the truck 1A is started again.

The polarity of the voltage applied to the contact wires 5 and 6 is reversed, and the trolley IA
, IB travels in the direction of arrow B, the following bogie 1B
When the vehicle rear-ends the preceding truck 1A, the truck 1B comes to stop.

According to the embodiment shown in FIG. 3, the electromagnetic contactor in the embodiment shown in FIG. 2 can be omitted, resulting in a simple configuration.

As described above, the present invention can always stop the following bogie while determining the running direction at that time.

According to the configuration of the present invention, the collision detector can be an ordinary conductor instead of an expensive and unreliable tape switch, and there is no need for a relay to discriminate the running direction. Therefore, the number of mechanically operating parts can be reduced and reliability can be improved.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a conventional device, and FIGS. 2 and 3 are circuit diagrams showing an embodiment of the present invention. 1, IA, IB... Trolley, 3A, 3B, 4A, 4B.
... Collision detection object, 5, 6 ... Power supply contact wire, 7A, 7
B, 8A, 8B... Current collector, 9A, 9B... Magnetic contactor, 10A, 10B, 10'A, 10'B... Current limiting resistor, IIA, 11B; 12A, 12B... diode.

Claims (1)

[Claims] 1. In a self-propelled electric trolley that receives power from the power supply line of track 7 via a current collector and travels on the track, conductive collision detectors are provided at both ends of the bogie, and A current limiting resistor is connected in series between a motor drive circuit that supplies power to the motor and an electric appliance that contacts each power supply line, and a diode is connected in parallel to each of the current limiting resistors. The collision detectors are connected to the anti-collector side terminals of separate diodes, and the connection polarity of the diodes is such that when one diode has forward polarity and the other diode has reverse polarity with respect to the power supply strength in the power supply line. By selecting opposite directions so that when two bogies collide on the track, the collision detection bodies of both bogies contact, and the current of the motor drive circuit of the following bogie is concentrated on one of the preceding bogies. An automatic stop device for a self-propelled electric trolley, characterized in that a bypass circuit is closed via a diode on the electric device side.