JPS593766B2 - Traveling direction detection device for electric transport equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is aimed at preventing collisions between electric carts in a reversible traveling section of an electric transport device that runs an electric cart on a prescribed running track to transport a load. ,
The present invention relates to a device that detects on the ground the traveling direction of an electric truck that has entered this section and controls the traveling of the truck in this section.

5. Electric transport equipment is a device that transports various types of cargo by having multiple trolleys move freely along a running track that is usually laid out over a wide area based on destination commands, etc., and has a one-way running line called the main line and a branching line. It consists of reversible running lines called branch lines.

The terminal point of a branch line is usually called a station, where bogies are unloaded,
This is where loading will take place. As shown in FIG. 1, when branching a branch line 2 from the main line 1, a branching device 21 consisting of a waiting section, a bogie transfer device, etc. is installed at the branching point.
This branching device 15 determines the destination display code of the trolley,
A bogie from the main line enters the branch line, or conversely, a bogie from the branch line enters the main line. By the way, there is no problem when multiple bogies all enter the branch line in the same direction and head towards the station, or when they re-enter the main line in the opposite direction. There is a problem when giving a start command to a bogie and a bogie at a station that has received an order to re-enter the main line at the same time.Of course, by prioritizing the start of one of the bogies, 5. It is necessary to make sure that the other truck does not start even if the other truck is running.

The above-mentioned problem does not only occur in the relationship between the main line and the branch line, but to explain a particularly problematic case as an example, conventionally, the control section at the branch point of the running track and the control at the station Each section is equipped with a relay that detects the running state of the bogie in each control section, and the detection signal from the relay in one control section is sent to the other control section, and the signals are exchanged with each other to give priority to the running of each bogie. ■5 I tried to control the situation.

However, in this case, dry contacts are usually used as the respective relay contacts in order to prevent power sources from coming into contact with the control device in each control section.

Therefore, an external line must be used as a signal line connecting both control sections, and at least four external lines are required. If the branch lines branching from the main line are long, it becomes extremely uneconomical to use at least four outside lines. The present invention
In order to easily perform such preferential control of the running of bogies, it is an object of the present invention to provide a running direction detection device that can determine in which direction a bogie runs in a reversible running section that requires preferential control of the running trajectory. At the same time, it is an attempt to avoid the drawbacks of the conventional device described above, and its feature is that the electric bogie that runs by collecting current from two power supply lines laid on the running track is connected to the above-mentioned two In an electric transport device configured to perform reversible travel by mutually reversing the polarity of the DC voltage supplied to the main power supply line, one further signal line is laid on the traveling track, and the Connect a diode between the two power supply lines and the signal line, with the polarity that current flows from each power supply line to the signal line, or the polarity that current flows from the signal line to each power line, and connect it to the ground. A current detecting means is provided between the two power supply lines and the signal line to determine the polarity of the current flowing from the signal line to each power supply line or the direction from each power supply line to the signal line, opposite to the direction on the electric trolley. The configuration is such that the polarities are connected so that a current flows, and the running direction of the electric truck is detected by the output of each of the current detection means.

Hereinafter, the present invention will be explained in detail with reference to Examples.

FIG. 2 illustrates a running direction detection circuit according to the present invention. In this figure, 3 and 4 are power supply contact wires (shown as a cross section) laid on the running track, which receive power from a DC power supply 6 via a power supply bus bar, and the switching device 6 can reverse the supply polarity. It is composed of 5 is a signal contact wire which has an important meaning in the present invention.

Reference numeral 7 denotes an electric trolley, which has current collectors 8 and 9 and can be driven by a drive motor M connected to the power supply trolley wires 3 and 4 via the current collectors 8 and 9.

Between the signal contact wire added on the running track and the two power supply contact wires, the polarity of the current flowing from each power supply contact wire 3, 4 to the signal contact wire 5 or from the signal contact wire 5 to each A diode 11 is connected to each of the power supply trolley wires 3 and 4 on the electric trolley 7 with the polarity such that the current flows.
, 12 are connected.

For example, in the embodiment shown in FIG.
Diodes 11 and 12 are provided for the polarity flowing from the current collector 4 to the signal contact wire 5 via the current collector 10. Furthermore, diodes 13 and 14 are connected between the two power supply contact wires 3 and 4 and the signal contact wire 5 via current detection means 15 and 16, respectively, from the signal contact wire 5 on the electric trolley 7, opposite to those on the electric trolley 7. The connection is made such that the current flows from each power supply contact wire 3, 4 to the signal contact wire 5, or the current flows from each power supply contact wire 3, 4 to the signal contact wire 5.

For example, in the embodiment shown in FIG. 2, diodes 13 and 14 are interposed with polarities in the direction in which current flows from the signal contact wire 5 to the two power supply contact wires 3 and 4. As the current detection means, for example, current detection relay 15,
16 are connected in series. Therefore, the power supply contact wire 3,
Depending on the polarity of the supply to 4, the power supply contact wire 3 → current collector 8 → diode 11 in the trolley → current collector 10 → signal contact wire 5 → ground side diode 13 → relay 15 → contact wire 4 circuit, or, Contact wire 4 → Current collector 9 → Diode inside the trolley 1
2 → Current collector 10 → Signal contact wire 5 → Ground side diode 1
Current flows in the circuit of 4 → relay 16 → power supply contact wire 3,
Relay 15 depending on the feeding polarity, that is, the running direction of the trolley.
, 16 is activated. The polarity of the power supply contact wires 3 and 4 can be determined by the current flowing through the ground-side diode 13 or 14 configured in this way, but in the example shown in the figure, the polarity of the contact wires 3 and 4 is activated by energization in the ground-side circuit. Current detection relays 15 and 16 are provided.

By using these relays 15 and 16, it is possible to directly control the energization of the control section described below. FIG. 3 shows an application example of the current detection relays 15 and 16 described above, and this example simply shows the reversible running section between the end points of the main line 1 and branch line 2 shown in FIG. ing. In this diagram, 1 is the main line, 2 is a branch line branching from this main line 1, and 2
A is the reversible running section of branch line 2, 1A is branching device 2 of main line 1
Reference numeral 2B is a control section provided before the branch point 1 that requires start/stop control, and 2B is a similar control section provided at the terminal station of the branch line 2. The two running direction detection circuits 10A and 10B each have a reversible running section 2A.
It is installed separately near both ends of the

If the feeding polarity of the branch line 2 to the power supply contact wires 3 and 4 is such that the bogie runs from the branch point toward the control section 2B, in this case, the end of the reversible running section on the control section 2B side The detection circuit 10B provided in the circuit operates. When power is being supplied at the pole where the bogie runs from the control section 2B of the branch line 2 toward the branch point, the detection circuit 10A provided at the end of the reversible traveling section toward the branch point It will start working. In order to make the bogie in the control section 1A of the main line 1 run toward the control section 2B where a station is provided, when an approach command a is issued when there is no bogie in the section 2A, the b contact 16b of the relay 16 closes. Therefore, when the transfer device 18 operates, the contactors 18A and 19A for power supply control are turned on, and when the transfer device 18 operates, the DC power supply is applied to the power supply contact wires 3 and 4 of the branch line 2 with the polarity 3 being positive. Power is supplied from 6 onwards.

As a result, the bogie 7 that was on the main line 1 is moved to the branch line 2 and starts traveling on this branch line 2. With the polarity at this time, when the trolley 7 enters the uncontrolled reversible traveling section 2A, a positive voltage applied to the power supply contact wire 3 is applied to the signal contact wire 5 via the current collector 8 and the diode 11 on the trolley 7. For this reason,
The diode 13 of the detection circuit 10B on the station side becomes conductive, and current flows to the current detection relay 15, which operates the relay 15, opening its b contact 15b and temporarily starting the bogie in the control section 2A onto the main line. Even if the command b is issued, the contactors 18B and 1 that control the power supply to the power supply contact wires 3 and 4 in the free running section 2A and the control section 2B
9B are both rendered inoperative, and the power supply bus 6B that supplies reverse polarity power to the free running section 2A is cut off, as well as the supply of power to the control section 2B. Therefore, even if another truck exists in the station control section 2B, this truck will not start. Conversely, if the feeding polarity of the running section is such that the bogie runs from the station to the main line, that is, the feeder contact wire 4 is positive and the feeder contact wire 3 is negative, the feeder will be fed to the main line side via the bogie in the same way. Since the diode 14 of the detection circuit 10A provided in the is conductive and the current detection relay 16 is operated, its b contact 16b is opened and the contactors 18A and 19A that control the power supply to the control section 1A and the free running section 2A are inoperable. and the power supply to this section is cut off, so the control section 1A
Even if a bogie enters the area, the bogie will be stopped in this section.

The traveling direction detection circuit according to the present invention connects a power supply contact wire to which a positive voltage is applied to a signal contact wire via a trolley, and uses this signal contact wire to determine the power supply characteristics of the power supply contact wire. Since the traveling direction is detected, the detection devices can be installed at both ends of the non-controlled section adjacent to the controlled section.

Therefore, there is almost no need for a signal line for transmitting the direction detection signal to the control device in the control section. In addition, it is possible to detect the presence of a bogie in the reversible travel section, and
Since the running direction of the bogie in that section can be absolutely determined, the bogie can be started in the control section provided before and after the reversible running section. Stopping can be controlled automatically. Furthermore, as shown in the example of the relationship between the main line and the branch lines, in the past, at least four signal lines (indicated by 20 in Fig. 3) were required as communication signal lines between both control sections. According to the present invention, since a signal line is used to conduct current through the trolley, only one signal contact wire is required, and it is not necessary to detect when the trolley passes a detection point as in the conventional method. Without,
No matter where the truck is within a certain detection section, detection can be performed as long as the truck exists within this section, so there is an effect that the detection can be completely avoided.

[Brief explanation of the drawing]

FIG. 1 is a travel route map, FIG. 2 is a circuit diagram showing one embodiment of the invention, and FIG. 3 is a circuit diagram showing another embodiment of the invention. 1...Main line, 1A...Control section, 2.
... Branch line, 2A ... Reversible free running section,
2B... Control section, 3, 4... Power supply contact wire, 5... Signal contact wire, 6...
Power supply, 7... Trolley, 8, 9, 10...
Current collector, 11, 12, 13, 14... Diode, 15, 16... Current detection relay 18A,
18B, 19A, 19B... Contactor.

Claims (1)

[Claims] 1. An electric bogie that runs by collecting current from two power supply lines laid on a running track is made to travel reversibly by mutually reversing the polarity of the DC voltage supplied to the two power supply lines. In the electric transport device, one further signal line is laid on the traveling track, and a diode is installed between each of the two power supply lines and the signal line on the electric trolley so as to be directed from each power supply line to the signal line. A diode is connected to the electrically powered trolley with the polarity in which the current flows or from the signal line to each feeder line through a current detecting means. Contrary to the above, the polarity in which the current flows from the signal line to each feeder line or the polarity in which the current flows from each feeder line to the signal line is connected, and the running direction of the electric trolley is determined by the output of each current detection means. A running direction detection device for an electric transport device, characterized in that it detects.