JP2010006526A - Conveyor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveyer device enabling efficient carrying requiring short carrying time, even if a power source instrument is made small and an excessive current is detected. <P>SOLUTION: The conveyer device 1 is divided into a plurality of zones aligning in a carrying direction, and provided with at least one driving motor 14 in each zone. The conveyer device 1 comprises a circuit structure having the power source instrument 11 supplying electric power to the driving motor 14, and an current monitoring means 12 monitoring an output current from the power source 11. When an excessive current value of the power source instrument 11 is detected, the driving motor 14 positioned at the most upstream side out of the zones controlled by the power supply instrument 11 is stopped. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a conveyor device equipped with a plurality of motors, and more particularly to a device capable of reducing the capacity of a power supply unit in the entire device.

  Conventionally, a conveyor device conveys an object to be conveyed using a motor as a drive source. More specifically, a belt, a roller, or a chain is rotated by a motor to convey an object to be conveyed on the conveyance line.

By the way, when an AC motor is used as a drive source, commercial power is supplied to the motor as it is, but when using a motor driven by a low-voltage DC, a power supply equipped with a rectifier circuit and a constant voltage circuit Is used as a power source.
Then, power is supplied from a single power supply to a plurality of motors.
Therefore, the ideal capacity of the power supply unit is a capacity that can drive the motor when all the objects to be transported that can be transported by the motor are placed on the entire transport line. In other words, it is desirable that the power supply has a capacity capable of efficiently transporting even in such a severe operating situation. However, considering the actual usage of the conveyor device, such a severe operating situation is rather rare.

Therefore, it can be said that a power supply device having a capacity as described above is of excessive quality in consideration of daily operating conditions.
Therefore, in view of the above situation, a method of using a small-sized and low-capacity power supply can be considered for the purpose of reducing the manufacturing cost of the conveyor. However, in practice, a large transported object may be transported suddenly, or a large amount of transported object may be transported continuously. In some cases, an excessive current is required under certain conditions. When a low-capacity power supply is used, it is assumed that the conveyor device does not function normally due to a shortage of power supply capacity.

In Patent Document 1, the current flowing through the controller is monitored, and when the current reaches a certain value, within the range of a motor that can drive one power supply, the conveyance direction upstream without stopping the conveyance of the object to be conveyed. The invention has been disclosed in which the current flowing through is restricted and the downstream object can be preferentially conveyed.
Japanese Patent No. 3368563

  The invention described in Patent Document 1 described above reduces the capacity of the power supply, monitors the current flowing through the controllers provided in each zone, and controls the current flowing through the motors connected to the respective controllers. In the control, when an excessive current flowing through the controller is detected, an allowable current for the zone on the most downstream side among the objects to be transported existing in the transport line among a plurality of zones controlled by one power supply. Supply the maximum current among the values. Further, when there is a zone downstream of the zone, an intermediate current smaller than the maximum current among the allowable current values is supplied to the zone, and one of the objects to be conveyed existing in the conveyance line is one than the most downstream zone. The minimum current among the allowable current values is supplied to the zone of the conveyed object existing on the upstream side.

  Specifically, as shown in FIG. 6A, the power supply supplies current only to the motor connected to the thick line. That is, when an excessive current is detected, the maximum current is supplied to the zone E, the intermediate current is supplied to the zone F, and the minimum current is supplied to the zone D according to the control described above. Furthermore, as shown in FIG. 6B, when each of the objects to be transported moves to the downstream zone, the maximum current is supplied to the zone F that is the most downstream of the zone controlled by one power supply unit. Control is performed so that an intermediate current is supplied to the zone E of the object to be conveyed that is one upstream from the downstream zone.

  In other words, the invention described in Patent Document 1 can reduce the size of the power supply, but the control executed when an excessive current of the controller is detected causes the coverage of two zones out of the zones controlled by one power supply. Only the conveyed product is conveyed downstream. That is, the amount of the object to be transported is extremely reduced, and it takes time to transport, so that it is difficult to transport efficiently in a short time.

  Therefore, in view of the above-described drawbacks, the present invention has an object to provide a conveyor device that can perform efficient conveyance with a short conveyance time even when an excessive current is detected by reducing the size of a power supply. .

  In order to solve the above-mentioned problem, the invention of claim 1 is a conveyor device that is divided into a plurality of zones arranged in the transport direction, and each zone is provided with at least one drive motor, and the drive motor includes In a conveyor apparatus having a power supply for supplying power and having a circuit configuration for supplying power to drive motors provided in a plurality of zones, the output current from the power supply is monitored. Provided with a current monitoring means, and when the current monitoring means detects an excessive current of the power supply, the power supply is provided in the most upstream zone in the transport direction among drive motors for supplying power. The conveyor device is characterized in that the drive motor is stopped.

Since the conveyor apparatus in this invention is provided with the current monitoring means which monitors the output current of the power supply device provided for every 1 or 2 or more zones, it can detect the excessive electric current in a power supply device. When an excessive output current value of the power supply is detected, the motor in the uppermost zone among the zones controlled by the power supply is stopped. Therefore, the excessive burden of a power supply is substantially eliminated. In other words, it falls within the current value that can be supplied by the power supply.
Further, although the transported object is transported with priority on the downstream side, the transport efficiency is not extremely lowered because the motor in the most upstream direction in the transport direction only stops. Therefore, a lot of time is not required for conveyance.
That is, according to the present invention, the capacity of the power supply can be reduced (the power supply can be downsized), and the manufacturing cost can be reduced.

  According to a second aspect of the present invention, in the first aspect of the present invention, the current monitoring means still detects an excessive current of the power supply unit even when the driving motor provided in the most upstream zone in the transport direction is stopped. The conveyor apparatus is characterized in that, in addition to the drive motor provided in the most upstream zone in the transport direction, the drive motor provided in the zone adjacent in the downstream direction is also stopped.

In the conveyor device according to claim 2, when the current monitoring means detects an excessive current value, the motor in the uppermost zone among the zones controlled by one power supply is stopped, and the excessive burden is still not resolved. Further stops the motor in the zone on the downstream side to carry it. That is, even when there is a larger load, the downstream transport is prioritized, but the transport efficiency does not become extremely low, so that a large time is not required for the transport. Therefore, even when there are a plurality of overweight objects to be conveyed, the objects to be conveyed can be efficiently conveyed with priority on the downstream side.
In short, when the current monitoring means detects an excessive current, in addition to the most upstream motor in the zone controlled by the power supply, the downstream motor adjacent to it is stopped in turn so that the overload state of the power supply Can be eliminated in a short time, and efficient conveyance can be continued.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the driving motor is stopped by stopping the power supply from the power supply to the driving motor. Stopped drive, provided that there is no transported object in the zone where the drive motor other than the stopped drive motor is provided, having transported object detection means for detecting whether or not it exists It is the conveyor apparatus which supplies electric power to the motor for operation.

In the conveyor device according to the third aspect, it is possible to detect whether or not there is a conveyed object in each zone by the conveyed object detection means. That is, when executing the control of the present invention, more efficient conveyance can be performed by executing the object detection means.
Specifically, when an excessive current of the power supply is detected and control is performed to stop the motor from the most upstream side of the zones controlled by the power supply, the zone of the motor that is driving other than that is executed. Existing objects to be conveyed are conveyed downstream. That is, the downstream transport object controlled by the power supply is transported preferentially. When all of the objects to be conveyed preferentially have moved to the zone controlled by the power supply adjacent in the downstream direction by the object detection means, the motors in the stopped zone The current is supplied again.
Since such control is performed, in the apparatus of the present invention, the objects to be conveyed do not collide on the conveyance line.

  When the current monitoring means detects an excessive current of the power supply, the conveyor device of the present invention can stop the motor located at the uppermost stream in the transport direction governed by the power supply and eliminate the overload of the power supply. . Therefore, even with a relatively small capacity power supply, the temporary overloading condition can be eliminated, the maximum capacity of the power supply can be reduced, and the conveyance efficiency can be extremely lowered. Therefore, the object to be conveyed can be efficiently conveyed.

  Next, the conveyor apparatus 1 which is embodiment of this invention is demonstrated in detail, referring drawings. FIG. 1 shows a conveyor apparatus 1 that can perform zone type control according to an embodiment of the present invention, and includes a single conveying line. First, a general configuration of the conveyor device 1 will be described.

  The conveyance line is divided into a plurality of control zones including a zone a, a zone b, a zone c,... Arranged in the conveyance direction, and each control zone a, b, c has one conveyor unit 2a, 2b, 2c is configured.

  The conveyor units 2a, 2b, and 2c are provided by supporting a plurality of conveying rollers 4 that convey a conveyed object between a pair of left and right side frames 3 and 3 arranged in parallel at predetermined intervals in the conveying direction. . The transport roller 4 includes a freely rotating driven roller 4b and a motor built-in roller 4a incorporating a drive motor 14 to which a current is supplied from a power supply. Adjacent transport rollers 4 are wound around a conductive belt 5. It has been turned. Therefore, the rotational driving force of the motor built-in roller 4a can be transmitted to all the driven rollers 4b. In this embodiment, one motor built-in roller 4a is arranged at the center of the unit, and the others are driven rollers 4b. As will be described later, one power supply supplies electric power to one or more drive motors 14 (motors in the motor built-in roller 4a).

The conveyor apparatus 1 is provided with three power supplies 11A, 11B, and 11C as shown in FIG. Then, power is supplied from each of the power supplies 11A, 11B, and 11C to the driving motors 14 (motors in the motor built-in roller 4a provided in each zone) that are components of a, b, c,. Supplied.
In other words, in this embodiment, one power supply 11 is provided for a party having a plurality of zones as a set, and in principle, one power supply 11 supplies power only to the driving motor 14 of the party that controls the power supply 11. To do. However, as a feature of the present embodiment, under certain conditions, there is a control to stop the most upstream motor in the zone controlled by the power supply 11, that is, the motor located at the most upstream in the conveyance direction in the party. Yes. In addition, this circuit is provided with current monitoring means 12 that can detect the output current of the power supply 11.

The conveyor units 2a, 2b, and 2c are provided with zone controllers (not shown) that perform drive control of the drive motor 14 in each motor-equipped roller 4a. This zone controller is connected to an adjacent controller and higher-level control means 13 described later by a signal line (not shown). That is, the zone controller can generate and send a signal to the motor in response to an external input signal such as a RUN / STOP signal or a CW / CCW signal (signal indicating the conveyance direction) from the host control means 13.
Further, the zone controller can be switched between the simultaneous transfer mode and the separation transfer mode. Since these modes are not directly related to the present invention, description thereof is omitted.

  Further, the operation state of the transfer line is centrally managed by the upper control means 13 configured by a programmable logic controller (PLC) or the like. A command signal (external input signal) such as a RUN / STOP signal indicating whether the entire line is operated or stopped and a CW / CCW signal indicating the conveyance direction is supplied from the host control means 13 and based on these command signals. Thus, the operation of the entire transfer line is controlled.

  In addition, each control zone a, b, c... In the transport line is used as a transport line while performing independent transport control based on the detection signal of each sensor, the signal transmitted from the upstream and downstream control zones, and the like. Secures coordinated transport.

The control zone a is provided with a transported object detection means 16 a, and the transported object detection means 16 a is composed of a stock sensor Sa and a light emitting element 6.
The in-stock sensor Sa is provided on the side frame 3. A photoelectric sensor can be used as the in-stock sensor Sa, and a light emitting element 6 such as a light emitting diode or an infrared diode is provided in the opposite side frame 3. Thus, when the object to be conveyed is conveyed, it is possible to detect that the light from the light emitting element 6 is blocked and the photoelectric sensor is turned on / off, and the object to be conveyed is conveyed to a predetermined position. .

  That is, the output of the stock sensor Sa is used as a stock signal indicating the presence / absence of a transported object in the control zone a. The conveyor units in the zones b and c are also provided with stock sensors Sb and Sc similar to the stock sensors Sa, and light emitting elements 6 are provided at positions facing these sensors Sb and Sc, respectively. It has been. These presence sensors Sa, Sb, and Sc output an on (H level) signal when the presence of the object to be conveyed is detected, and output an off (L level) signal when the object to be conveyed does not exist.

  In addition to the above configuration, a specific configuration in the conveyor device 1 of the present embodiment will be described.

In the present embodiment, the output current of each power supply 11 is monitored by the current monitoring unit 12 and the current state is notified to the host control unit 13. A relay switch 15 is provided between the power supply 11 and the driving motor for each zone as shown in FIG. 3, and is normally in a closed state. However, when the current monitoring unit 12 detects an excessive current, the relay switch 15 on the upstream side in the transport direction is opened. Further, in a plurality of zones controlled by the controlled power supply 11, the transported object detection means 16 detects whether or not a transported object exists in each zone other than the stopped zone. If there is no conveyed object in each zone, the current is supplied again to the stopped drive motor 14.
With such a configuration, the host control unit 13 can always grasp the power supply 11 in which an excessive current is detected, and an excessive load on the power supply 11 can be efficiently eliminated. Further, the detection of the presence or absence of the object to be conveyed by the object to be conveyed detection means 16 allows the supply of current to the stopped driving motor 14 to be resumed quickly, and the conveyance in a short time becomes possible efficiently.

  An embodiment having such a configuration will be described in detail with reference to FIGS. Further, each control will be described in addition.

FIG. 2 is a circuit diagram showing connection of power supply units employed in the conveyor apparatus shown in FIG. 3 and 4 are explanatory diagrams showing the current flow and the state of conveyance of the object to be conveyed when the current monitoring unit 12B detects an excessive current. FIG. 5 is a flowchart of the control when the current monitoring unit 12 detects an excessive current.
The circuit shown in FIG. 2 includes three power supplies 11A, 11B, and 11C, and current monitoring means 12A, 12B, and 12C that detect output currents of the power supplies 11A, 11B, and 11C are provided.

  Three current monitoring units 12A, 12B, and 12C are connected to one upper control unit 13, and one power supply 11 is connected to one party (a set of drive motors 14 to which power is supplied by each power supply 11). ) Driving motors (motors in motor-incorporated rollers 4a provided one by one in the zone) 14 are connected. Further, the circuit of this embodiment is configured such that each drive motor 14 can be RUN / STOP, and a relay switch 15 is provided between the power supply 11 and each drive motor as shown in FIGS. It has been.

Each zone controller (not shown) receives a RUN / STOP signal from the host control means 13 and controls each drive motor 14. As a result, the circuit can efficiently stop the drive motor 14 on the upstream side of the party controlled by each power supply 11.
Further, the number of drive motors 14 included in one party is one or two or more, and the number of parties is not necessarily the same. In this embodiment, the number of parties is three because there are three power supplies 11. The number of drive motors for each party 30, 31, 32 is seven for the first party 30 controlled by the upstream power supply 11A (7 constituting seven zones a, b, c,...). And the second party 31 controlled by the power supply 11B is six (six motors 14a, 14b,... Constituting six zones a, b, c,...). ), And the third party 32 controlled by the power supply 11C is seven (seven motors 14a, 14b,... Constituting seven zones). Further, the circuit configuration includes relay switches 15 (relay switches 15a, 15b...) Corresponding to the number of zones existing in each party.

  In the embodiment having the above-described configuration, the drive motor 14 at the most upstream in the transport direction in a plurality of zones, so-called parties, respectively controlled by the corresponding power supply units 11 according to the current values detected by the current monitoring means 12A, 12B, 12C. Control to stop working. That is, the control for RUN / STOP of the drive motor 14 on the most upstream side in the transport direction is performed based on the current value detected by the current monitoring unit 12. At this time, transport downstream in the transport direction is preferentially performed.

Here, the conveyor apparatus 1 of this embodiment is normally drive | operated within the capacity | capacitance which the power supply 11 has, and is a structure which the control shown in FIG. 5 works on a fixed condition. Therefore, description will be made using the control flow of FIG.
In STEP 1, if an excessive current is detected by the current monitoring means 12, the process proceeds to STEP 2. At this time, if the current monitoring means 12 does not detect an excessive current, the process returns to STEP 1 and current monitoring of each power supply 11 is continued. In short, normal operation is maintained, and an average current is supplied to the plurality of drive motors 14 of the party controlled by each power supply 11.

  In STEP 2, the drive motor 14 in the zone in the uppermost stream in the transport direction among the parties controlled by the power supply 11 detected in STEP 1 is stopped. For example, in FIG. 2, when the current monitoring unit 12B detects that the current of the central power supply 11B is excessive, the control is applied to the party controlled by the power supply 11B. That is, when the current monitoring unit 12B detects an excessive current value in the transport line controlled by the power supply 11B, no current is supplied to the most upstream zone a. That is, the relay switch 15a is opened and the current is cut off.

  As a result, a current flows through the circuit indicated by the thick line in FIG. That is, the driving motor 14a provided in the zone a is stopped when the relay switch 15a is opened, and the relay switches 15b to 15f connected to the other zones b to f are kept closed, so that current is supplied. Is maintained.

As a result, as shown in FIGS. 3B and 3C, the zones b, c, d, e, and f are driven, and the conveyed items on the zones b, c, d, e, and f are conveyed downstream. go.
That is, the burden on the power supply 11B of the second party 31 through which an excessive current flows is substantially eliminated by the stop of the driving motor 14a in the most upstream zone (zone a), and the other zones b, c, d, The drive motors 14b, c, d, e, and f of e and f can be rotated.

  In STEP 3, the output current of the power supply 11B is detected again. At this time, if an excessive current value is detected again by the current detection means 12B, the process proceeds to STEP 4 ′, and the drive motor 14b in the zone b adjacent in the downstream direction is stopped in addition to the most upstream zone a (see FIG. 4). ). That is, the relay switch 15b is turned off. Then, returning again to STEP 3, the current of the current detection means 12B is examined. As a result, if it is detected that the output current of the power supply 11B is still excessive, the drive motor 14c in the downstream zone c is stopped. That is, the relay switch 15c is turned off. For example, as shown in FIG. 4A, when the object to be transported is placed in all the zones controlled by the power supply 11B, an excessive load on the power supply 11B can be obtained only by stopping the most upstream drive motor 14a. As shown in FIG. 4B, the drive motor of the drive motor 14b is also stopped to try to eliminate the load. Although not shown in FIG. 4, if the output current of the power supply 11B is excessive even when the drive motor 14a and the drive motor 14b are stopped, the power supply to the drive motor 14c is stopped.

  In short, by stopping the drive motor 14a on the most upstream side, the excessive burden on the power supply 11B is eliminated, and the downstream transported object should be smoothly transported, but depending on the amount of transported object, etc. May not be the case. Therefore, in STEP 3, the current is continuously monitored until the excessive load on the power supply 11B is resolved. If an excessive current is not detected in the operation of STEP3, the process proceeds to STEP4, and the object to be conveyed detection means 16 applies the power to the zone of the drive motor 14 that can supply power among the zones controlled by the power supply 11B. It is confirmed whether there is a conveyed product. That is, it is confirmed that there is no object to be conveyed in the zone where the driving motor other than the driving motor whose power supply is stopped is provided.

  That is, priority is given to the downstream side in the transport direction, and the downstream transport object is further sent to the downstream side. Specifically, this is to prevent the transported object from colliding and clogging in the middle of the transport line by transporting the downstream side preferentially. That is, as shown in FIG. 3B and FIG. 4B, if there is a transported object, steps are performed until the transported object is transported to a party controlled by the power supply 11C on the downstream side of the power supply 11B. The confirmation work of the presence or absence of the conveyed object 4 is performed.

  When all the objects to be transported on the zone corresponding to the drive motor 14 that can be driven at the party 31 (the switch 15 is in the ON state) are transported to the downstream side, the process proceeds to STEP 5 and the power source that controls the party 31 again. The current value of the device 11B is monitored. At this time, if the power supply 11B still maintains an excessive current value, the monitoring is continued by the current monitoring means 12B until the excessive load is eliminated. If an excessive current value is not detected, the process proceeds to step 6 where the current is supplied again to the driving motor 14 stopped by the control. That is, as shown in FIGS. 3 (c) and 4 (c), when all the downstream objects are moved to the party 32 of the power supply 11c adjacent in the downstream direction, the driving motor 14a in the zone a, Alternatively, the current is supplied again to the drive motors 14a and 14b, the normal operation is smoothly performed, and the operation from STEP1 is performed again.

As described above, for example, when the power supply 11B shown in FIG. 2 outputs an excessive current and the value is detected by the current monitoring unit 12B, a STOP signal is transmitted from the host connection unit 13. Specifically, the drive motor 14a located at the uppermost stream in the party zone controlled by the power supply 11B is stopped, and the downstream object to be conveyed is preferentially conveyed. However, if it is detected that the output current of the power supply 11B is still excessive, a STOP signal is generated and transmitted to the zone controller such as the downstream drive motor 14b. That is, the drive motor 14 on the downstream side is stopped in order from the drive motor 14b in the zone adjacent to the downstream direction of the stopped drive motor 14a.
Then, each of the zone controllers that has received it stops the corresponding drive motor 14. Thereby, the excessive burden of the power supply 11B is eliminated, and the conveyed object is smoothly conveyed. That is, even when an excessive current is detected by reducing the capacity of the power supply 11B, efficient conveyance can be performed in a short time without lowering the conveyance efficiency.

  In addition, the above-described control is performed in the same manner when the transported object moves to the party 32. By adopting such a configuration, even if the load on the power supply 11 becomes excessive, it is possible to rationally convey the object to be conveyed by stopping in order from the most upstream driving motor 14a.

Therefore, as described above, it is possible to stop from the most upstream side of the driving motor 14 controlled by the power supply 11, so that even when the maximum capacity of the power supply 11 is reduced, an excessive current is required. Problems and the like that occur in the conveyor device 1 can be solved. Furthermore, since it is control which gives priority to the conveyance of the conveyance direction downstream side, it can convey efficiently, without the to-be-conveyed objects collide in the middle of the conveyor apparatus 1. FIG. In other words, even if the maximum capacity of each power supply 11 is reduced, the above-described control can rationally carry a short time, so that the cost of the entire conveyor device 1 can be reduced.
Furthermore, in this embodiment, it is confirmed that there is no object to be transported in the zone where the drive motor other than the drive motor that stopped supplying power is present, and the current monitoring means 12 does not detect an excessive current value. As a condition, since electric power is supplied to the driving motor that is stopped, the normal operation can be resumed after the overload state is reliably resolved. Therefore, there is no problem that the opening / closing of the switch 15 is frequently repeated.

Although the conveyor apparatus 1 of this embodiment showed the circuit of 3 party structure, this invention is not necessarily limited to this.
For example, it may be 2 parties or 4 parties or more.

It is a top view which shows the structure of the zone control type conveyor apparatus which concerns on this invention. It is a circuit diagram which shows the connection of the power supply employ | adopted as the zone control type conveyor apparatus which concerns on this invention. It is explanatory drawing (a), (b), (c) which shows the flow of an electric current at the time of stopping only the most upstream motor when the electric current monitoring means 12B detects an overcurrent, and the conveyance condition of a to-be-conveyed object. Explanatory diagrams (a) and (b) showing the current flow and the state of conveyance of the object to be conveyed when the current monitoring means 12B detects the excessive current and the downstream motor in addition to the most upstream motor in turn. ), (C). It is a flowchart which controls the motor which the power supply device in a present Example controls. It is explanatory drawing (a), (b) which shows the flow of an electric current when a motor is controlled by a prior art, and the conveyance condition of a to-be-conveyed object.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyor apparatus 11 Power supply device 12 Current monitoring means 13 Host control means 14 Drive motor 15 Relay switch 16 Conveyed object detection means

Claims (3)

A conveyor device divided into a plurality of zones arranged in the transport direction, each zone having at least one drive motor,
A power supply for supplying power to the drive motor;
In a conveyor apparatus having a circuit configuration in which the power supply supplies power to a driving motor provided in a plurality of zones,
Comprising current monitoring means for monitoring the output current from the power supply;
When the current monitoring means detects an excessive current of the power supply unit, the drive motor provided in the most upstream zone in the transport direction is stopped among the drive motors supplied with power by the power supply unit. A conveyor device characterized by:   If the current monitoring means still detects an excessive current of the power supply even when the drive motor provided in the zone upstream in the transport direction is stopped, it is provided in the zone upstream in the transport direction. The conveyor apparatus according to claim 1, wherein, in addition to the drive motor, a drive motor provided in a zone adjacent in the downstream direction is also stopped.   The drive motor is stopped by stopping power supply from the power supply to the drive motor, and has a transported object detection means for detecting whether there is a transported object on the zone. 3. The electric power is supplied to the stopped driving motor on condition that there is no object to be conveyed in the zone where the driving motor other than the driving motor is provided. 4. Conveyor device.

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