WO2013147011A1

WO2013147011A1 - Conveyor device, zone controller, motor control device, and device group controlled by motor control device

Info

Publication number: WO2013147011A1
Application number: PCT/JP2013/059233
Authority: WO
Inventors: 橘　俊之
Original assignee: 伊東電機株式会社
Priority date: 2012-03-29
Filing date: 2013-03-28
Publication date: 2013-10-03
Also published as: JPWO2013147011A1

Abstract

This invention addresses the problem of providing a conveyor device and a zone controller in which regenerative current can be effectively utilized and a stable actuation can be ensured. The interior of the zone controller (10) is divided into an actuation circuit part (21) and a power supply circuit part (22). The power supply circuit part (22) is provided with: a current input terminal (30) which is connected to the power supply and which receives power from the power supply; an earth-side terminal (31); and an auxiliary power terminal (32). The power supply circuit part (22) has a backflow prevention means (35) such as a diode, and a capacitor (36). Current flowing from the power supply device (40) through the plus-side power line (46) is fed to the actuation circuit part (21) and causes a motor (4) to rotate. Since the regenerative current is a current flowing in the reverse direction with respect to the backflow prevention means (35), the regenerative current does not return to the power supply side, and the auxiliary power terminal (32) reaches a high-potential state. When the motor (4) of an adjacent zone is driven, a regenerative current generated in the zone conveyor (2) is consumed in the adjacent zone conveyor (2).

Description

Conveyor device, zone controller, motor control device and device group controlled by motor control device

The present invention is applied to a distributed control type conveyor apparatus, and more particularly to a conveyor apparatus that effectively uses a regenerative current of a motor. The present invention also relates to a zone controller employed in a distributed control type conveyor device.
The present invention also relates to a motor control device for controlling a motor and a device group using the motor control device.

Conveyor devices are used in courier and post office collection areas. Here, the conveyor device includes a roller conveyor device in which cylindrical transport rollers are arranged on a transport line, a belt conveyor device in which a transport belt is stretched, and the like.
Further, distributed control is known as a control method of the conveyor device (Patent Document 1). In the distributed control, a plurality of zone conveyors are arranged in series to form a series of conveyance paths, and each zone conveyor has an independent motor. Each zone conveyor is attached with a zone controller, and the zone controller controls each zone conveyor.

The zone controller outputs driving power to the motor and receives signals from the stock sensors provided in each zone.
Further, the zone controller has a communication function, and exchanges signals with the zone controller of the adjacent zone.
For example, information on whether an on-off state of a stock sensor in an adjacent zone or whether a motor in an adjacent zone is activated is exchanged.
Then, for example, when a predetermined condition is met such that the conveyed product exists in the own zone and the conveyed product does not exist in the downstream zone, the motor of the own zone is activated to send the conveyed product to the downstream zone.

For example, as shown in FIG. 10, when there is a conveyed product W in the A zone and this is conveyed to the G zone side (downstream side), the A zone motor is activated to move the conveyed product downstream. When the conveyed product W reaches the B zone, which is the next zone, the B zone is activated and the conveyed product is drawn to the B zone side.
When the conveyed product completely moves to the B zone, the motor of the previous A zone is stopped. Thereafter, this operation is repeated, and the conveyed product is sequentially fed to the downstream side (G zone side).

The conveyor device by distributed control has an advantage that the layout can be easily changed. For example, when it is desired to extend the overall length of the conveyor device, a new zone conveyor is inserted at the end or intermediate portion of the existing conveyor device. Conversely, if it is desired to reduce the overall length, one of the zone conveyors can be removed and the space between them can be packed.

In the distributed control type conveyor apparatus, each zone conveyor has a motor independently as described above, and the electric power for driving the motor is supplied from the zone controller.
That is, the distributed control type conveyor apparatus has a separate power source, and power is supplied from the power source to the zone controller, and further, power is supplied from the zone controller to the motor.
The current supplied from the power source to the zone controller is mainly an alternating current, but in recent years, the use of a direct current is increasing.

JP 2005-231745 A

By the way, as a problem common to industrial machines, there is a demand to reduce power consumption. That is, in the industrial world, an industrial machine with low power consumption and energy saving is desired.
As one of the measures for realizing energy saving, a method using a regenerative current is known.
That is, the motor rotates by supplying a current, but when the motor is forcibly rotated by an external force, a current (regenerative current) is generated. Therefore, if the regenerative current generated by the motor can be used effectively, the overall power consumption can be kept low, and energy saving can be realized.

In general, in a device that uses a regenerative current, a circuit configuration is employed in which the regenerative current generated by the motor is returned to the power supply side.
Therefore, if a distributed control type conveyor device is configured according to this circuit configuration, the regenerative current generated by the motor is returned to the power supply side via the zone controller.

Therefore, the present inventors made a prototype of a conveyor device having a circuit configuration that returns the regenerative current to the power source side in accordance with a general energy-saving circuit using the regenerative current.
The power supply device adopted for the trial production is a 24 volt DC power supply, and employs a circuit configuration that performs DC power transmission from the DC power supply to each zone controller. In the prototype conveyor device, the regenerative current was returned directly to the power transmission line side for effective use of the regenerative current.
However, an unexpected problem occurred in the prototype conveyor device.
That is, when a conveyor device having the above-described circuit configuration was prototyped and a conveyed product was conveyed, an abnormality occurred in the power supply device, and the power supply was stopped.

When this cause was investigated, it was because the protection circuit of the power supply device was activated.
That is, the DC power supply is designed to output a constant voltage (for example, 24 volts), and if the voltage on the output side becomes abnormally high, the protection circuit works to stop power transmission.
In the prototype conveyor device, the voltage of the regenerative current generated by the motor is instantaneously high, and the protection circuit is activated.

In view of the above-described problems, an object of the present invention is to provide a conveyor device and a zone controller that can effectively use a regenerative current and can ensure a stable operation.
It is another object of the present invention to provide a motor control device and a device group capable of effectively using a regenerative current for a device group including a motor and ensuring stable operation.

The invention for solving the above-mentioned problems is used in a conveyor device in which a plurality of zone conveyors driven by a motor are arranged, a current input terminal connected to a power source and receiving power from the power source, and supplying power to the motor A zone controller that controls one or a plurality of zone conveyors to supply power to the motor and to control the operation of the motor, and allows a current from the input side to the output side. , Having a backflow prevention means for preventing the reverse, and the input side of the backflow prevention means is connected to the current input terminal, and allows the current from the current input terminal to the device in the zone controller to allow current input from within the zone controller It has an auxiliary power terminal that blocks the current flowing toward the terminal side and connects the output side of the backflow prevention means to the outside of the zone controller. It is the zone controller according to claim.

The zone controller of the present invention is used in a conveyor device in which a plurality of zone conveyors are arranged, and controls the conveyor device in a distributed manner.
The zone controller of the present invention is used by connecting a power source and a current input terminal. The zone controller of the present invention is used by connecting auxiliary power terminals of a plurality of zone controllers.
In the zone controller of the present invention, power generated by the power source is introduced into the zone controller from the current input terminal, and power is supplied to the motor from the power supply unit of the zone controller, thereby driving the motor.
On the other hand, when the motor is rotated by an external force, a regenerative current is generated, but since the current flowing from the inside of the zone controller to the current input terminal side is blocked by the backflow prevention means, the regenerative current does not flow to the power supply side. Absent. Therefore, the power supply circuit does not cause an abnormality.
In the present invention, since the auxiliary power terminal is connected to the output side of the backflow prevention means, the regenerative current flows to the auxiliary power terminal side. Since the auxiliary power terminal is connected to the auxiliary power terminal of another zone controller, the regenerative current generated in one zone flows to the zone controller having jurisdiction over the other zone.
As described above, since the auxiliary power terminal is connected to the output side of the backflow prevention means, the backflow prevention means does not block current flowing from the auxiliary power terminal to the inside of the zone controller. Therefore, the regenerative current generated in one zone flows from the auxiliary power terminal of the zone controller into the other zone controller via the auxiliary power terminal of the other zone controller, and contributes to the rotation of the motor in the other zone. .
In addition, as described in FIG. 10, the dispersion control is such that the transported object W is sequentially fed, so that one of the zone conveyors is stopped and one of the zone conveyors is normally driven. is there. Therefore, in a conveyor device that is distributedly controlled, when there is a zone conveyor that generates a regenerative current, in most cases, there is a zone conveyor that is in a driving state. Therefore, the regenerative current can be consumed without waste.

Another invention for solving the same problem is to construct a system in which a plurality of devices using a motor as a power source are arranged, a current input terminal connected to a power source and receiving power from the power source, A motor control device that has a power supply unit that supplies power to a motor, controls the operation of the motor while controlling power of the motor or motors, and outputs from the input side It has a backflow prevention means that allows current to flow to the side and blocks the reverse, and the input side of the backflow prevention means is connected to the current input terminal, allowing current to flow from the current input terminal to the equipment in the motor controller And an auxiliary power terminal for blocking current flowing from the inside of the motor control device to the current input terminal side and connecting the output side of the backflow prevention means and the outside of the motor control device. A motor control device.

The motor control device of the present invention applies the technical idea of the motor control device described above to general devices including a conveyor device.
That is, the motor control device of the present invention is used in a system in which a plurality of devices using a plurality of motors as power sources are arranged.
The motor control device of the present invention is also used by connecting a power source and a current input terminal. The motor control device of the present invention is used by connecting auxiliary power terminals of a plurality of motor control devices.
Also in the motor control device of the present invention, the current flowing from the inside of the motor control device to the current input terminal side is blocked by the backflow prevention means, so that the regenerative current does not flow to the power source side. Therefore, the power supply circuit does not cause an abnormality.
In the present invention, since the auxiliary power terminal is connected to the output side of the backflow prevention means, the regenerative current flows to the auxiliary power terminal side. The auxiliary power terminal is connected to an auxiliary power terminal of another motor control device. The regenerative current generated in one motor flows from the auxiliary power terminal of the motor control device into the other motor control device via the auxiliary power terminal of the other motor control device, and the rotation of the motor of the other device. Contribute to.

The above-described zone controller and motor control device (hereinafter abbreviated as zone controller or the like) have a capacitor, which is connected in parallel to the load side including the power supply unit, and one end of which is a backflow prevention means. It is desirable to be connected between the output side and the auxiliary power terminal.

For example, in a conveyor apparatus that is distributedly controlled, when there is a zone conveyor that generates a regenerative current, in most cases, there is a zone conveyor that is being driven. However, there are exceptional cases where there is only a zone conveyor that generates a regenerative current and there is no zone conveyor in a driving state. Therefore, in the present invention, a capacitor is connected in parallel to the load with one end between the output side of the backflow prevention means and the auxiliary power terminal, and the regenerative current is stored.
When auxiliary power terminals such as a plurality of zone controllers are connected to each other, the capacitors and the like of all the zone controllers are connected in parallel, and a large capacitance is ensured.

The invention of the zone controller or the like in a more specific form of the configuration described above has a capacitor, and one end of the capacitor is connected between the output side of the backflow prevention means and the auxiliary power terminal, and the other end of the capacitor Is connected to a portion conducting to the negative side of the power source.

It is desirable that the zone controller has a built-in rectifier circuit.

Further, a plurality of zone conveyors (or motors) may be controlled to supply electric power to each motor and to control the operation of each motor.

It has a rectifier circuit corresponding to each motor, and has a backflow prevention means and a capacitor corresponding to each rectifier circuit, and the capacitor is connected in parallel with the load side including the power supply unit, and one end of which is prevented The structure connected between the output side of the means and the auxiliary power terminal can be adopted.

It may have a rectifier circuit corresponding to each motor, a shared power supply unit that supplies power to each rectifier circuit, and the shared power supply unit provided with a backflow prevention means and a capacitor.

It is desirable to incorporate a transport program for smoothly transporting the transported object and a drive program for driving the motor at a predetermined timing.

The invention of the conveyor device is a conveyor device in which a plurality of zone conveyors are arranged, and the zone controller having the above-described configuration is arranged for each zone or a set of a plurality of zones,
A conveyor device characterized in that auxiliary power terminals such as a plurality of zone controllers are connected to each other.

In the conveyor device of the present invention, the regenerative current can be used effectively.

In addition, the invention of the device group that can be expected to have the same effect is a device group in which a plurality of devices using a motor as a power source are arranged. It is a device group controlled by a motor control device, characterized in that auxiliary power terminals of a plurality of motor control devices are connected to each other.

It is desirable that the zone controller or the like is connected to a DC power source, and that the DC power source is configured so that a protective function is activated when the voltage on the output side exceeds a certain standard.

In the conveyor device and the zone controller of the present invention, the regenerative current generated by the motor can be used effectively, contributing to energy saving. Further, the conveyor device and the zone controller of the present invention have a small influence on the power supply side, and the operation of the conveyor device is stabilized.

It is a perspective view of the conveyor apparatus of embodiment of this invention. It is a perspective view of the zone conveyor of the conveyor apparatus of FIG. It is a conceptual diagram which shows the wiring of the conveyor apparatus of FIG. FIG. 2 is a block diagram and wiring diagram of a zone controller employed in the conveyor device of FIG. 1. It is a circuit diagram of the conveyor apparatus of FIG. FIG. 6 is a circuit diagram in which only the power supply device, the backflow prevention means, and the capacitor are extracted from the circuit diagram of FIG. 5 and rewritten. It is a circuit diagram of the conveyor apparatus of other embodiment of this invention. It is the block diagram and wiring diagram of the zone controller which are employ | adopted with the conveyor apparatus of further another embodiment of this invention. It is the block diagram and wiring diagram of the zone controller which are employ | adopted with the conveyor apparatus of further another embodiment of this invention. It is explanatory drawing explaining operation | movement of the dispersion | distribution control type conveyor apparatus. It is a perspective view of the apparatus group of the embodiment of the present invention. It is a perspective view which shows the internal structure of each apparatus which comprises the apparatus group of FIG.

Embodiments of the present invention will be further described below.
As shown in FIG. 1, the conveyor apparatus 1 of this embodiment has a plurality of

zone conveyors

2a, 2b, 2c,... Arranged in series in the transport direction.
Since the mechanical structures and sizes of the

zone conveyors

2a, 2b, 2c... Are the same, the structure of the zone conveyor 2b in the center of the drawing will be described as a representative.
In the zone conveyor 2b, a plurality of conveyance rollers 5 that convey the conveyed product W between a pair of left and right side frames 3, 3 arranged in parallel are pivotally supported at a predetermined interval in the conveyance direction. The transport roller 5 includes a driven roller 5b that freely rotates and a motor-integrated roller 5a that incorporates a drive motor (not shown). In this embodiment, there is only one roller 5a with a built-in motor, and the others are all driven rollers 5b.

The adjacent conveyance rollers 5 in the zone conveyor 2 b are wound around a transmission belt 6. Therefore, the rotational driving force of the motor built-in roller 5a can be transmitted to all the driven rollers 5b. In this embodiment, the motor built-in roller 5a is arranged at the center.

Further, as shown in FIG. 2, the zone conveyor 2b is provided with a stock sensor Sb. The in-stock sensor Sb is provided on the side frame 3. The position of the in-stock sensor Sb is near the downstream end.

As the in-stock sensor-Sb, a photoelectric sensor can be used, and a light emitting element (not shown) such as a light emitting diode or an infrared diode is provided on the opposite side frame 3. Thereby, when the conveyed product is conveyed, the light from the light emitting element is blocked and an on (H level) signal is output, and when there is no conveyed item, an off (L level) signal is output. In this way, it is possible to detect that the photoelectric sensor is turned on / off and the conveyed product is conveyed to a predetermined position.

As shown in FIGS. 2 and 3, each

side conveyor

3a, 2b, 2c,... Has a zone controller 10a to 10a for controlling the driving of the motor 4 in the motor built-in roller 5a. 10c, and adjacent zone controllers 10a to 10c to 10n are mutually connected by a signal line 7. In addition, the host controller 50 is connected to the zone controller 10 a via the signal line 8.
In addition to the signal lines 7 and 8, the side frame 3 includes a plus power line 46, a minus power line 47, and an auxiliary power line 48, and a drive current is supplied by these.

FIG. 4 shows the internal configuration and connection state of the zone controllers 10a to 10n in more detail.
Since the zone controllers 10a to 10n have the same configuration, the zone controller 10b will be described as a representative.
The inside of the zone controller 10 b is largely divided into an operation circuit unit 21 and a power supply circuit unit 22.
The operation circuit unit 21 of the zone controller 10b receives the signal of the load sensor Sb in its own zone.

The operation circuit unit 21 of the zone controller 10 b includes a power supply unit 23 for driving the motor 4. A motor drive circuit 15 is a main part of the power supply unit 23. The motor drive circuit 15 of the power supply unit 23 includes a known PWM circuit (Pulse Width Modulation). In the present embodiment, the PWM circuit includes a rectifier circuit, and has an effect of rectifying the regenerative current.
Further, the operation circuit unit 21 of the zone controller 10 b includes a calculation unit 11. The calculation unit 11 incorporates a normal conveyance program for smoothly conveying the conveyed product W. The conveyance program is formed including an arithmetic circuit including a ZPA controller that performs zero pressure accumulation control (ZPA control), and generates a control signal for driving the motor 4 and sends it to the motor drive circuit 15. The zero pressure accumulation control is a control method for executing the operation described in FIG.
The calculation unit 11 also performs an operation of generating and sending a necessary control signal to the power supply unit 23 in response to an external input signal such as a RUN / STOP signal from the host control device 50 such as a PLC.

A signal referred to by the calculation unit 11 is selectively set by a switch (not shown). That is, in the present embodiment, the transport program can be set to be switched to the simultaneous transport mode, the separation transport mode, and the transport prohibit mode, and a signal to be referred to by the calculation unit 11 is selected according to the setting. Description of each conveyance mode is omitted.
The motor drive circuit 15 drives the motor 4 while receiving a control signal from the calculation unit 11 and a detection signal from a hall element (magnetic pole position detector not shown) provided in the brushless motor built in the motor built-in roller 5a.
Here, a signal that can be transmitted and received between the zone controllers 10 can be set as desired.

In the zone controller 10b of the embodiment, the presence signal of the zone controller 10a adjacent to the upstream side in the flow direction of the conveyed product W, the presence signal of the zone controller 10c adjacent to the downstream side, and the driving state signal of the downstream zone Is input to the operation circuit unit 21 of the zone controller 10b via a signal input unit (not shown).
In addition, a stock signal and a drive state signal output from the calculation unit 11 of the zone controller 10b are transmitted to the

other zone controllers

10a and 10c.
The presence signal is a detection signal of the presence sensors Sa to Sc provided in each control zone.

In the present embodiment, each zone controller 10 can refer to the upstream and downstream presence signals and the downstream drive state signals.
Further, the command signal from the host controller 50 is transmitted to the zone controller 10a, and further transmitted to all the zone controllers on the transport line.
Then, information on the on / off state of the presence sensor in the adjacent zone and whether or not the motor in the adjacent zone is activated are exchanged.
Then, for example, when a predetermined condition is met such that the conveyed product exists in the own zone and the conveyed product does not exist in the downstream zone, the motor of the own zone is activated to send the conveyed product to the downstream zone.

The zone controller 10b of the present embodiment includes an auxiliary power terminal 32 as a specific configuration, and further includes a characteristic configuration in the power supply circuit unit 22.
That is, the zone controller 10 b of this embodiment includes an auxiliary power terminal 32 in addition to a current input terminal 30 that is connected to a power source and receives power from the power source, and a ground side terminal 31.
The current input terminal 30 is a positive terminal, and the ground terminal 31 is a negative terminal.
In the zone controller 10 b, the current is introduced into the power supply circuit unit 22 from the current input terminal 30, which is a plus side terminal, and further, power is supplied to the operation circuit unit 21. Apparently, the current is introduced from the current input terminal 30 which is the plus side terminal, flows through the operation circuit unit 21, and reaches the ground side terminal 31 which is the minus side terminal.

Thus, the power supply circuit unit 22 of the present embodiment is a circuit that connects the current input terminal 30 and the operation circuit unit 21.
The power supply circuit unit 22 of the present embodiment has a backflow prevention means 35 such as a diode and a capacitor 36 as a characteristic configuration.
The anode (input side) of the backflow prevention means 35 is connected to the current input terminal 30 which is a plus side terminal, and the cathode (output side) of the backflow prevention means 35 is connected to the operation circuit unit 21.
The cathode side (output side) of the backflow prevention means 35 is branched and connected to one electrode of the capacitor 36. That is, one end side of the capacitor 36 is connected between the cathode side (output side) of the backflow prevention means 35 and the auxiliary power terminal 32.
The other electrode of the capacitor 36 is connected to a ground side terminal 31 that is a negative side terminal. Therefore, the capacitor 36 is substantially connected in parallel with the operation circuit unit 21. That is, the capacitor 36 is connected in parallel to the load side including the power supply unit 23.

As shown in FIGS. 3, 4, and 5, the conveyor device 1 of the present embodiment includes an external power supply device 40 and receives power supply from the power supply device 40.
The power supply device 40 is a power supply that generates a constant voltage direct current, and in the present embodiment, is a 24 volt constant voltage power supply.
As described above, the one side frame 3 of the conveyor apparatus 1 includes the plus power line 46, the minus power line 47, and the auxiliary power line 48. Terminals (not shown) of the power supply device 40 are connected to the positive power line 46 and the negative power line 47 of the side frame 3.
Further, the plus side power line 46 is branched in each zone conveyor 2 and connected to the current input terminal 30 which is the plus side terminal of the zone controller 10.
Similarly, the minus side power line 47 is branched in each zone conveyor 2 and connected to the ground side terminal 31 which is the minus side terminal of the zone controller 10.
Therefore, each zone conveyor 2 is connected in parallel to the power supply device 40 and can receive power supply from the power supply device 40.

The auxiliary power line 48 is branched in each zone conveyor 2 and connected to the auxiliary power terminal 32 of the zone controller 10. Therefore, the auxiliary power terminals 32 of all the zone controllers 10 of the conveyor apparatus 1 are connected by the auxiliary power line 48.
This state is represented by a circuit diagram as shown in FIG.

Next, the effect | action of the conveyor apparatus 1 of this embodiment is demonstrated.
Each zone controller 10 of the conveyor device 1 is connected in parallel to the power supply device 40 as described above, and can receive power supply from the power supply device 40. Each zone controller 10 is input with various signals, and can independently rotate the motor 4 of the zone that it controls.
That is, the current flowing through the positive power line 46 from the power supply device 40 enters the power supply circuit unit 22 of each zone conveyor 2 from the current input terminal 30 as the positive terminal as indicated by the solid line arrow. In the present embodiment, a backflow prevention means 35 such as a diode is interposed between the current input terminal 30 of the power supply circuit section 22 and the operation circuit section 21, but the backflow prevention means 35 is a current input terminal. Since the direction of flow from 30 to the operation circuit unit 21 is the forward direction, the current introduced from the current input terminal 30 as shown by the solid arrow is supplied to the operation circuit unit 21 to rotate the motor 4.

On the other hand, when the motor 4 rotates by inertia, a regenerative current is generated. The regenerative current generated by the motor 4 is rectified by a rectifier circuit included in the PWM circuit of the motor drive circuit 15 and returned to the power supply circuit unit 22 as a direct current. For example, when the motor 4 controlled by the zone controller 10a rotates by inertia, the regenerative current generated by the motor 4 is rectified by the rectifier circuit provided in the PWM circuit of the motor drive circuit 15, and the backflow prevention means 35 is indicated by the broken arrow. Return to the side. That is, a positive potential is generated on the cathode (output side) side of the backflow prevention means 35.
Since the current in the direction of the broken arrow is the reverse current with respect to the backflow prevention means 35, the regenerative current does not return to the power supply side. Therefore, the auxiliary power terminal 32a of the zone controller 10a is in a high potential state.

On the other hand, according to the example of FIG. 10 described above, when the regenerative current is generated in the zone conveyor 2a, the adjacent zone conveyor 2b is in a driving state.
Therefore, the auxiliary power terminal 32b of the adjacent zone controller 10b is in a lower potential state than the auxiliary power terminal 32a of the zone controller 10a. Therefore, a current flows from the auxiliary power terminal 32a of the zone controller 10a to the auxiliary power terminal 32b of the zone controller 10b, contributing to driving of the motor 4. That is, the regenerative current generated in the zone conveyor 2a is consumed in the adjacent zone conveyor 2b. Moreover, since the electric current supplied from the power supply device 40 reduces by using regenerative current, it contributes to energy saving.

In the above description, it has been explained that the regenerative current generated in the zone conveyor 2a is consumed by the adjacent zone conveyor 2b according to the example of FIG. 10, but this description is merely an example description. In the present embodiment, since the auxiliary power terminals 32 of all the zone controllers 10 are connected by the auxiliary power line 48, the regenerative current generated in any one of the zone conveyors 2 is consumed by any one of the zone conveyors 2. It becomes.

Further, when any of the zone conveyors 2 is in a stopped state when the regenerative current is generated, the electricity is stored in the capacitor 36.

In the present embodiment, the capacitors 36 of all the zone controllers 10 are connected in parallel by the auxiliary power line 48. That is, when only the power supply device 40, the backflow prevention means 35, and the capacitor 36 are extracted from the circuit diagram of FIG. 5 and rewritten, the circuit shown in FIG. 6 is obtained, and the capacitors 36 of all the zone controllers 10 are connected in parallel by the auxiliary power line 48. Is done.
Therefore, the surplus regenerative power generated in one zone conveyor 2 is stored not only in the capacitor 36 of the zone controller in the zone but also in the capacitors 36 of all the zone controllers 10.
Further, in this embodiment, the capacitors 36 of all the zone controllers 10 are connected in parallel by the auxiliary power line 48. Therefore, the electrostatic capacity of the entire conveyor device 1 is considerably large, and the excessive power is considerably large. Even if there is, it can be charged.
And when it becomes necessary to rotate the motor 4 of any zone conveyor 2, an electric charge is discharge | released from the capacitor | condenser 36 and it contributes to rotation of the motor 4. FIG.

Thus, since the conveyor apparatus 1 of this embodiment can utilize a regenerative current effectively, it can suppress the power consumption.
Further, since the regenerative current does not flow backward to the power supply device 40 side, no abnormalities occur in the power supply device 40 and stable operation can be maintained.

In the above description, the configuration having the minus side power line 47 is disclosed, and the configuration in which the ground side terminal 31 and the minus pole of the power supply device 40 are connected via the minus side power line 47 has been described. 3 may connect the ground-side terminal 31 and the negative pole of the power supply device 40 to each other.
FIG. 7 shows a circuit diagram when the ground side terminal 31 and the negative pole of the power supply device 40 are connected via the chassis ground.

In the above-described embodiment, an example in which one zone controller is provided for one zone conveyor has been described. However, the present invention is also applied to a conveyor device configured to control a plurality of zone conveyors with one zone controller. Can do.
Here, the zone controllers that control a plurality of zone conveyors are, for example, zone controllers 60 and 61 (FIGS. 8 and 9) each including a plurality of power circuit units 21 shown in FIG. One package 62 is housed.
The zone controller 60 that controls a plurality of zone conveyors may be such that, for example, as shown in the conceptual diagram of FIG.

This configuration has a rectifier circuit (included in the PWM circuit 15) corresponding to each motor, and includes a backflow prevention means 35 and a capacitor 36 corresponding to each rectifier circuit. The capacitor 36 is connected in parallel with the load side including the power supply device 40, and one end thereof is connected between the output side of the backflow prevention means 35 and the auxiliary power terminal 32.

Alternatively, like the zone controller 61 shown in FIG. 9, the power supply circuit unit 22 may be integrated and power may be supplied from one power supply circuit unit 22 to the plurality of power circuit units 21.
That is, the zone controller 61 shown in FIG. 9 has a rectifier circuit (included in the PWM circuit 15) corresponding to each motor, a shared power supply unit (power supply circuit unit 22) that supplies power to each rectifier circuit, A backflow prevention means 35 and a capacitor 36 are provided in the common power feeding unit.

The motor built-in roller described above has built-in conveyance programs such as a simultaneous conveyance mode and a separation conveyance mode, but the contents of the conveyance program are arbitrary. That is, a more advanced conveyance program may be built in, or conversely, a simpler conveyance program may be included. Furthermore, the present invention can be applied to a zone controller that does not have a transfer program.

In the above-described embodiment, the technical idea of the present invention is applied to the zone controller 61 that operates the conveyor device 1, but the technical idea of the present invention can be used in addition to the conveyor device 1.
For example, the present invention can be applied to a display device system in which a plurality of display devices 100 as shown in FIG. 11 are arranged.
A display device 100 shown in FIG. 11 has a housing 101 with

rollers

105, 106 and the like built therein as shown in FIG. That is, in the housing 101, a frame 103, a lower roller 105, an upper roller 106, and a display sheet 111 are built.

In the display device 1 of the present embodiment, a motor unit (not shown) is incorporated in the lower roller 5 and the upper roller 5. When the motor in the motor unit is rotated, the lower roller 5 and the upper roller 5 are rotated at the number of rotations decelerated by the speed reducer, and the display sheet 111 is moved.
In the present embodiment, the motor control device 120 having the same structure as the zone controller 10 described above is used to drive the motor of each display device 1.
In the motor control device 120, the calculation unit 11 has a built-in program for driving the motor at regular intervals.

DESCRIPTION OF SYMBOLS 1

Conveyor apparatus

2a, 2b,

2c Zone conveyor

10a, 10b, 10c Zone controller 15 Motor drive circuit 22 Power supply circuit part 23 Power supply part 31 Earth side terminal 32 Auxiliary power terminal 35 Backflow prevention means 36 Capacitor 40 Power supply apparatus 46 Positive side power line 47 Negative power line 48

Auxiliary power line

60, 61, 120 Zone controller

Claims

Used in a conveyor device in which a plurality of zone conveyors driven by a motor are arranged, and includes a current input terminal that is connected to a power source and receives power from the power source, and a power supply unit that supplies power to the motor. A zone controller that controls a plurality of zone conveyors and supplies power to the motor and controls the operation of the motor.
It has a backflow prevention means that allows current flowing from the input side to the output side and prevents the reverse,
The input side of the backflow prevention means is connected to the current input terminal, allows current from the current input terminal to the device in the zone controller, and blocks current from the zone controller to the current input terminal side,
A zone controller comprising an auxiliary power terminal for connecting the output side of the backflow prevention means and the outside of the zone controller.
It has a capacitor, and the capacitor is connected in parallel to the load side including the power supply unit, and one end of the capacitor is connected between the output side of the backflow prevention means and the auxiliary power terminal. The zone controller according to claim 1.
It has a capacitor, and one end of the capacitor is connected between the output side of the backflow prevention means and the auxiliary power terminal, and the other end of the capacitor is connected to a portion that conducts to the negative side of the power source. The zone controller according to claim 1 or 2, characterized by the above-mentioned.
The zone controller according to any one of claims 1 to 3, wherein a rectifier circuit is incorporated.
The zone controller according to any one of claims 1 to 4, wherein the zone controller controls a plurality of zone conveyors and individually supplies power to each motor and controls the operation of each motor.
It has a rectifier circuit corresponding to each motor, and has a backflow prevention means and a capacitor corresponding to each rectifier circuit, and the capacitor is connected in parallel with the load side including the power supply unit, and one end of which is prevented 6. The zone controller according to claim 5, wherein the zone controller is connected between the output side of the means and the auxiliary power terminal.
6. A rectifier circuit corresponding to each motor, a shared power supply unit that supplies power to each rectifier circuit, and a backflow prevention means and a capacitor are provided in the shared power supply unit. The described zone controller.
The zone controller according to any one of claims 1 to 7, further comprising a conveyance program for smoothly conveying the conveyed product.
It is a conveyor device in which a plurality of zone conveyors are arranged, and the zone controller according to any one of claims 1 to 8 is arranged for each zone or a set of a plurality of zones,
A conveyor device, wherein auxiliary power terminals of a plurality of zone controllers are connected to each other.
10. The conveyor apparatus according to claim 9, wherein the zone controller is connected to a DC power supply, and the DC power supply has a protective function when the voltage on the output side exceeds a certain standard.
A system in which a plurality of devices using a motor as a power source is arranged, has a current input terminal that is connected to a power source and receives power from the power source, and a power supply unit that supplies power to the motor, A motor control device that controls one or a plurality of motors and supplies electric power to the motors, and controls the operation of the motors,
It has a backflow prevention means that allows current flowing from the input side to the output side and prevents the reverse,
The input side of the backflow prevention means is connected to the current input terminal, and allows the current from the current input terminal to the device in the motor control device and prevents the current from the inside of the motor control device to the current input terminal side,
A motor control device comprising an auxiliary power terminal for connecting the output side of the backflow prevention means and the outside of the motor control device.
It has a capacitor, and the capacitor is connected in parallel to the load side including the power supply unit, and one end of the capacitor is connected between the output side of the backflow prevention means and the auxiliary power terminal. The motor control device according to claim 11.
It has a capacitor, and one end of the capacitor is connected between the output side of the backflow prevention means and the auxiliary power terminal, and the other end of the capacitor is connected to a portion that conducts to the negative side of the power source. The motor control device according to claim 11 or 12, characterized in that
The motor control device according to any one of claims 11 to 13, wherein a rectifier circuit is incorporated.
The motor control device according to any one of claims 11 to 14, wherein power is individually supplied to a plurality of motors and operation of each motor is controlled.
It has a rectifier circuit corresponding to each motor, and has a backflow prevention means and a capacitor corresponding to each rectifier circuit, and the capacitor is connected in parallel with the load side including the power supply unit, and one end of which is prevented The motor control device according to claim 15, wherein the motor control device is connected between an output side of the means and an auxiliary power terminal.
16. A rectifier circuit corresponding to each motor, a shared power supply unit that supplies power to each rectifier circuit, and a backflow prevention means and a capacitor are provided in the shared power supply unit. The motor control apparatus described.
18. The motor control device according to claim 11, further comprising a drive program for driving the motor at a predetermined timing.
A device group in which a plurality of devices using a motor as a power source are arranged, and the motor control device according to any one of claims 11 to 18 is arranged for each device or a set of a plurality of devices,
A device group controlled by a motor control device, wherein auxiliary power terminals of a plurality of motor control devices are connected to each other.
The apparatus controlled by the motor control device according to claim 19, wherein the motor control device is connected to a DC power source, and the DC power source has a protective function when the voltage on the output side exceeds a certain reference. group.