JPH0667046B2 - Power supply control device for carrier vehicles - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a power supply control device for a plurality of carriages traveling on the same track, and particularly to a power supply line divided and arranged along a track. The power supply range is controlled while switching the power supply according to the traveling position of the carrier vehicle, and it is possible to bring the carrier closer to each other without collision.

[Conventional technology]

In general, a steel mill or the like uses a large number of carrier trucks for transporting steel strip coils, slabs, and the like between processes.

For example, in order to convey a coil wound in a continuous process line such as a pickling line to a continuous process line such as a cold rolling line, there is a conveyor vehicle equipment with a drive motor that travels on two rail tracks. It is used.

In that case, multiple carrier vehicles are prepared on the same track,
A drive motor is installed in each trolley, and the drive power is supplied to each of the motors from the same multiple power sources installed on the ground via the power supply lines, and the trolley is started by a command from the control device. -The running state such as running and stopping is controlled.

In order to prevent collision of the truck during the above-mentioned traveling control, the power supply line is divided into a large number of insulating sections (closed areas) at regular intervals, and only one truck can be put in one closed area. As described above, the power supply control is performed to switch the power supply according to the position of the dolly.

Among the conventional power feeding control devices of this type, there is, for example, the one shown in FIG. That is,
The carrier V is equipped with a drive motor M so that it can travel on a rail (not shown) by itself. The power supply line 1 for supplying drive power to the motor M is divided into a large number of closed areas 2i (i = 1, 2, ..., Same below) arranged along the rail and insulated from each other. Area 2i and 1:
The power supply 3i is provided corresponding to the number 1. The power supply 3i is, for example, a ground-mounted dip including an inverter that converts direct current into alternating current and outputs it.
Then, the power supply path 5 that connects the corresponding closed area and the power supply source.
A power feeding path switch 4i is provided for each i.

Power supply to each block region is controlled by opening and closing these power supply path switches 4i in accordance with a command from the power supply switching control device 7 according to the progress of the carriage. That is, the carriage V is in the closed area 2
By closing the feed line switch 4 ₁ when in _1,
Power is supplied from the power supply 3 ₁ to the closed area 2 ₁ via the power supply path 5 ₁ , and the drive motor M is supplied with power via the trolley shoe S, and the carriage V travels. Carrier V is closed area 2
Becomes immediately before the move to _2, feed lines switch 4 ₁ closes the feed line switch 4 ₂ opens. Thus, feeding source _{3 1}
It is switched to supply power 3 ₂ from the driving motor M of the conveyance carriage V, so that the power is supplied from the closed area 2 ₂ of the feed line 1. In the same manner, power supply control is performed by sequentially moving the closed area 2i to which power is supplied as the carriage V advances. During that time, two vehicles do not enter the same closed area 2i, so a collision is prevented.

The trolley position is detected by, for example, a trolley position detection device provided with a limit switch (not shown) for each closed region 2i.

On the other hand, in the one shown in FIG. 4, the same number of power supply sources 3i as the carrier vehicles V are prepared and arranged along the track, and
A plurality of closed areas 2i are assigned to each i. Then, in accordance with the progress of the conveyance carriage V, 4 ₁ a feed line switch 4i by a command from the power supply switching control device 7,
By sequentially opening and closing 4 ₂ and 4 ₃ , the closed region to which power is supplied is moved to 2 ₁ → 2 ₂ → 2 ₃ . If the power supply 3 ₁ is covered, the power supply switching controller 8 ₁ opens the power supply switching switch 8 ₁ and closes the power supply switching switch 8 ₂ to close the power supply 3 _1. Switch to ₂ . Similarly, the power supply path switch 4i is connected to the carriage V.
By sequentially opening and closing in accordance with the progress of, the closed area to which power is supplied is moved to 2 ₄ → 2 ₅ → 2 ₆ .

According to this method, the required number of power supplies 3i is significantly reduced as compared with the case of FIG. 3, so that the equipment cost can be reduced.

[Problems to be solved by the invention]

However, the conventional power supply control device shown in FIG. 3 has a problem that the equipment cost increases because the power supply 3i is provided for each closed area 2i.

Further, in the conventional power supply control device for a carrier truck shown in FIG. 4, two carriages cannot enter the range covered by one power supply 3i, so that the carriages can approach each other. However, there is another problem that the controllability is not good.

Therefore, the present invention has been made by paying attention to the problems of the above-mentioned conventional example, and the number of power supply sources can be minimized, and the transport vehicle V can be freely approached at low cost and highly controllable transport. An object is to provide a power supply control device for a truck.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a power supply line which is divided into a plurality of closed areas along a track along which a plurality of carrier vehicles travel, and the closed area of a plurality of sections. Opening and closing of the power supply line connected between multiple power supply sources that supply drive power to each carrier via electric wires, and the power supply line on the carrier car side in each closed area and the corresponding power supply path on the power supply side And a control range changing switch inserted in pairs between the power supply path on the power supply side of each closed area and the power supply path switch, and the next closed area from the closed area where the carriage is actually traveling. When entering the area, the feeder switch in the next closed area is switched to closed and the switch for changing the control range is switched to open.At the same time, the feeder switch in the currently closed area is opened and controlled. The range changing switch is provided with a power supply switching control device that switches each switch to the closed state. That.

[Action]

In the present invention, the power supply path switches provided for each power supply path to each closed area are connected via the control range changing switch, and these switches are controlled by the power supply switching control device depending on the carriage position. By controlling the opening and closing of the vehicles, the trucks can freely approach each other to the adjacent closed areas. At the same time, the control range changing switches corresponding to the two closed areas that are approaching each other are controlled to be open to avoid collision between the carrier vehicles.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

In the figure, a power supply line 1 is arranged along a bogie track (not shown), and a closed area 2 of a predetermined length is insulated at both ends.
It is divided into i. The same number of power supply sources 3i as the carrier vehicles V are prepared, and the power supply sources 3i are arranged at equal intervals so that one power supply source covers a plurality of closed areas (four areas in the figure). The power supply path switch 4i, which is a normally open contact, is inserted in each power supply path 5i from these power supply sources 3 ₁ , 3 _2, ... To each closed region 2i.

Thus, in order to connect the adjacent closed areas to each other in the power supply path 6i that connects the power supply path switches 4i and connects them to the power supply 3i, the control range changing switch composed of the normally closed contacts is connected. Device 10i is inserted. Power supply switching control device 7
Is the position of the carrier vehicle V by correlating the above-described normally-open power supply path switch 4i, normally-closed control range changing switch 10i, and power supply switching switch 8i for sequentially switching the power supply 3i. Switching control is performed according to. The power supply / source synchronization control device 9 is connected to adjacent power supply sources, for example, 3 ₁ , 3 ₂ , and when the power supply 3 ₁ is switched to the power supply 3 ₂ , the carrier vehicle V travels smoothly. It functions to synchronize the output AC waveform, and the switching timing is instructed from the power feeding switching control device 7.

Of the above configurations, the power feeding path switch 4i, the power feeding path 5i,
6i, the power supply switching control device 7, the power supply switching switch 8i, the power supply tuning control device 9, and the control range changing switch 10i are incorporated in a control panel placed in the electrical equipment room.

Next, the operation of the above embodiment will be described.

Now, as shown by the solid line in FIG.
It is assumed that the vehicle is traveling within ₁ .

In this state, the power supply path switch 4 ₁ and the power supply switching switch 8 ₁ that are normally open are closed, and power is being transmitted from the power supply 3 ₁ to the closed area 2 ₁ . Power is supplied to the drive motor M of the carriage V.

At this time, the control range for changing switch 10 ₁ of the normally closed forming a normally-open feed line switch 4 ₁ and pair because in the open, closed zone 2 ₂
Is not powered. Eventually, the striker is attached to the conveyance carriage V, which turns on operation in contact with an unillustrated limit switch as closed area 2 ₁ progressive side end carriage position detecting device installed in unit. Then, it is made a command from the power supply switching control device 7 which receives the ON signal, closes the feeding path switch 4 _2, whereas the control range for changing switch 10 ₂ forming a pair therewith is opened. At the same time, feed line switch 4 with ₁ opens, the control range for changing switch 10 ₁ which forms a pair therewith
Closes. As a result, when the vehicle V enters the next closed area, the power supply from the power supply 3 ₁ to the closed area 2 ₁ is cut off in advance, and the power supply 3 ₁ is switched to the next closed area 2 ₂ . it and will be, transport vehicle V can continue to progress smoothly while being supplied with power from the feed line 1 of the closure zone 2 _2.

Similarly, the power supply from the power supply 3 ₁ is applied to the closed area 2 ₁
→ closed area 2 ₂ → closed area 2 ₃ → closed area 2 ₄ and carrier V
Will be switched in sequence with the progress of.

Thus when the platform car V reaches the closed zone 2 _4, feeding source 3
_The power supply range shared by ₁ ends. Where the next feeding source 3 ₂
Is taken over by. That is, the closed area 2 ₄ to the closed area 2 ₅
When the trolley V enters the vehicle, the power supply switching control device 7 switches the power supply switching switch 8 ₁ to 8 ₂ to switch the power supply 3 ₁ to 3 ₂ . In this switching, if a short circuit occurs between the power supplies 3i, the power supplies will be destroyed. In order to avoid this, the power supply switching control device 7 has an interlock function for instructing to close the next power supply switching switch 8 ₂ after confirming that the power supply switching switch 8 ₁ is completely opened. There is.

Closing the feeding source switching switch _82, closes the feed line switch 4 ₅ simultaneously, power is supplied to the occlusion zone 2 _5. If the waveform of the AC power supply supplied to the drive motor M of the truck is different before and after the switching of the power supply, the motor M may not be driven smoothly, and in the worst case, the phase may be reversed and the motor may be stopped. . So in response to a command of the power supply switching control device 7, a paper supply tuning control unit 9 acts, after synchronizing the feeding source 3 ₂ of the output waveform to that of feeding source 3 _1, advancing the carriage.

In the above, the case where one transport vehicle V ₁ continues to travel has been described, but a plurality of multiple transport vehicles V ₂ are used, such as when another vehicle V ₂ is stopped within the closed area 2i at the preceding position. If you want to bring two trucks closer together, you need to prevent the collision of the trucks. At that time, when the position detecting device detects that the vehicle V ₁ has entered the immediately preceding adjacent (or close to, the blocking region 2i of the _1st to 2nd sections), the power supply switching control device 7 Of the power supply path switch 4i and the control range changing switch 1 corresponding thereto
The connection of 0i is released and the carriage V ₁ is stopped. Each switch and two state of the carriage V _1, V ₂ at this time is, for example, as shown in FIG. 2, with the feed line switch 4 _4, adjacent control range for changing switch 10 ₄ is also in an open , Closed area 2
_Since the power supply to _{No. 4} is cut off, the carts V ₁ and V ₂ stop in the adjacent closed area, and the collision can be completely prevented.

In the above embodiment, each switch is described as a normally open and normally closed electromagnetic relay contact system, but the invention is not limited to this, and a contactless switching element system such as a thyristor may be used. Since the number of switching elements greatly affects the price, the cost reduction effect is further increased.

Further, in the above-described embodiment, the number of power supply sources 3i is set equal to the number of carrier vehicles V. However, when the carrier vehicles V are often concentrated or the cycle time is short, the number of power source sources 3i is changed. By increasing the number of carriages to allow a margin, the carrying capacity can be improved.

〔The invention's effect〕

As described above, according to the present invention, since the control range changing switch is inserted between the power supply path switches in the power supply control device of the carrier, the number of power supplies is minimized to transfer the power supply range. The switch can be switched according to the traveling position of the trolley, and even when the transport trolleys travel in the adjacent closed areas, the control range change switch inserted between the closed areas is controlled to open. Therefore, the carrier vehicles can be freely brought close to each other without causing a collision, so that it is possible to provide a low-cost and highly controllable power supply control device for the carrier vehicles.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram for explaining its operation, and FIGS. 3 and 4 are block diagrams showing a conventional power supply control device for a carrier vehicle. . 1 is a power supply line, 2 is a closed area, 3 is a power supply, 4 is a power supply path switch, 5 and 6 are power supply paths, 7 is a power supply switching control device, 8 is a power supply switching switch, and 9 is a power supply synchronization control. The devices 10 are switches for changing the control range.

Claims (1)

[Claims] 1. A power supply line divided into a plurality of closed areas along a track along which a plurality of transfer vehicles travel, and each transfer vehicle sharing the closed areas of a plurality of sections through the power supply lines. A plurality of power supply sources for supplying driving power to the power supply line, a power supply line switch connected between the power supply line on the carrier side of each closed area and the corresponding power supply path on the power supply side, and each closed area. A control range changing switch inserted in a pair with the power supply path switch between the power supply paths on the power supply side, and when the transport vehicle enters the next block area from the currently running block area, At the same time as switching the power line switch in the next closed area to closed and the control range changing switch to open, the power line switch in the currently running closed area is open and the control range changing switch is closed. And a power supply switching control device for switching the power supply switching device, respectively.