JP3232013B2 - Divertor drive control method, diverter drive control device, diverter drive device, and sorting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention drives a diverter for automatically paying out a large number of packages placed on a conveyor for each delivery destination from the conveyor, for example, at a distribution center or a truck terminal. The present invention relates to a control method, a drive control device, a drive device of the diverter to which the drive control method is applied, and a sorting device including the drive control device and the drive device.

[0002]

2. Description of the Related Art Conventionally, in a belt conveyor type sorting apparatus using a steel belt or the like, a payout apparatus (hereinafter, referred to as "diverter") as shown in FIG. 8 is provided for each sorting destination along a belt 53 of the sorting conveyor. There are multiple arrays. Such a diverter 50 includes a diverter 5 around a pivot 52 provided at one end of a payout plate 51.
The reciprocating rocking of the dispensing plate 51, which is a component of No. 0, between the standby position 61 and the dispensing position 62 allows the sorting object (hereinafter referred to as “package”) to be placed and conveyed on the belt. To the chute provided on the side of the belt 53. Note that the standby position 61 is a position on the one end edge side of the belt 53 in the transport direction and a position through which the load placed and transported on the belt 53 passes, and the payout position 62 is a position of the belt 53. The position where the luggage can be delivered to the chute from above. As shown in FIG. 8, such a diverter 50 includes a brake motor 54, a crank mechanism 55 connected to a turning shaft 52, and one end of one arm 55 a constituting the crank mechanism 55, as shown in FIG. 8. Part 5 on the periphery
6a, and a rotating plate 56 rotatably connected to the motor 6a and having an output shaft of the motor 54 fixed at the center. A commercial AC is supplied to the brake motor 54 via an electromagnetic contactor (magnet contactor) 57 whose operation is controlled by a controller 58.

A diverter 5 having such a driving device
The operation of 0 will be described. First, the electromagnetic contactor 57 is turned on by a control signal sent from the controller 58, the brake of the motor 54 is released, and the motor 54 is operated. Thus, the rotating plate 56 starts to rotate, for example, one rotation clockwise. By the rotation of the rotary plate 56, the turning shaft 52 rotates via the crank mechanism 55, and the dispensing plate 51 performs a reciprocating operation from the standby position 61, through the dispensing position 62, and back to the standby position 61 again. Further, when the dispensing plate 51 moves from the dispensing position 62 to the standby position 61, for example, the detection plate 59 provided on the rotary plate 56 is detected by the detection unit 60 such as a proximity switch, so that the detection unit 60 sends a signal to the controller 58. Then, by supplying the signal, the controller 58 turns the electromagnetic contactor 57 off. Therefore, the payout plate 51 stops at the standby position 61 by the braking operation of the motor 54.
Since the braking force of the motor 54 is constant, the detecting unit 60 is installed when the detecting unit 60 is installed so that the dispensing plate 51 always stops at the standby position 61 each time the dispensing plate 51 operates.
Is adjusted, the position at which the detection plate 59 is detected, that is, the arrangement position of the detection unit 60 is adjusted.

[0004]

In such a conventional diverter 50, since the commercial current is supplied to the brake motor 54, the rotation speed of the output shaft of the brake motor 54 is constant. The operating speed of the payout plate 51 is also fixed to one type, and the operating speed cannot be made variable. On the other hand, in the sorting device, the number of packages that can be sorted per unit time, that is, the sorting ability must be improved. As one method of improving the sorting ability, the interval between the articles placed on the belt 53 along the transport direction is made as narrow as possible, and the above-described dispensing plate 51 is used to sort the articles arranged at a narrow interval. There is a method of increasing the reciprocating operation speed.

However, the length of the load conveyed by the belt 53 varies, and if the reciprocating speed of the dispensing plate 51 is uniformly increased, for example, when the load is long, Only the leading end portion of the load in the direction may be oriented toward the chute by the payout plate 51, and the center of gravity of the load may still remain on the belt 53. In such a case, troubles such as no sorting, a jam in the chute, and the like occur. Further, in the above-described conventional diverter 50, since the brake motor 54 and the electromagnetic contactor 57 are used, a considerable impact sound is generated when starting the braking operation of the dispensing plate 51,
There is also a problem that periodic maintenance is required because wear of the brake of the motor 54 and wear of the contacts of the magnet for the motor 54 occur. The present invention has been made in order to solve such problems, and the operating speed of a diverter dispensing plate is variable, and the sorting ability can be improved by surely dispensing luggage, and low noise and low maintenance. It is an object of the present invention to provide a diverter drive control method and a drive control device that are free, a diverter drive device to which the drive control method is applied, and a sorting device including the drive control device and the drive device.

[0006]

According to a first aspect of the present invention, there is provided a diverter drive control method, comprising: a diverter dispensing plate provided to face a chute from which a sorting object is dispensed from a belt for conveying the sorting object. The dispensing plate is controlled by inverter control between a dispensing position for dispensing the sorting object to the chute and a standby position for letting the sorting object pass around a turning axis provided at one end of the dispensing plate. In a diverter drive control method of a sorting device that automatically sorts the sorted objects by reciprocatingly oscillating by a driving source to be driven, in the diverter drive control method, the dispensing necessary for dispensing the sorted objects to the chute is performed. A current of a first frequency for operating the dispensing plate at a speed is set for each sorting object in accordance with the first frequency or the dispensing speed. Supply to the drive source at the supply time, and at the end of the current supply time, the dispensing at a constant stop speed required to stop the dispensing plate at the standby position regardless of the level of the dispensing speed. A constant second frequency current for operating the plate is supplied to the drive source, and after the start of the second frequency current supply, before the dispensing plate returns to the standby position, the second supply to the drive source is performed. The supply of the two frequencies is stopped to stop the payout plate at the standby position.

A diverter drive control device according to a second aspect of the present invention includes a diverter dispensing plate provided opposite a chute from which a sorting object is dispensed from a belt for conveying the sorting object. A drive source for driving the dispensing plate by inverter control between a dispensing position for dispensing the sorted object to the chute and a standby position for passing the sorted object around a turning shaft provided at one end of the plate; By reciprocating rocking at the diverter drive control device of a sorting device that automatically performs sorting processing on the sorting object, the dispensing speed required for dispensing the sorting object to the chute. The current of the first frequency for operating the dispensing plate is supplied to each of the sorting objects at the current supply time set in accordance with the first frequency or the dispensing speed. Supply to the drive source, and at the end of the current supply time, operate the dispensing plate at a constant stop speed necessary to stop the dispensing plate at the standby position regardless of the level of the dispensing speed. For supplying a constant second frequency current to the drive source, and after starting the second frequency current supply, before the dispensing plate returns to the standby position,
The supply of the second frequency to the drive source is stopped, and the payout plate is stopped at the standby position.

A diverter driving device according to a third aspect of the present invention is the diverter driving device whose operation is controlled by the diverter driving control device according to the second aspect, wherein the currents of the first frequency and the second frequency are different from each other. A driving source to be supplied;
A rotating plate that rotates together with the output shaft of the drive source, and a part of a peripheral portion of the rotating plate and a turning shaft of the dispensing plate are connected,
A crank mechanism for reciprocatingly swinging the dispensing plate between the standby position and the dispensing position in response to one rotation of the rotating plate.

A sorting apparatus according to a fourth aspect of the present invention includes a diverter dispensing plate provided opposite a chute from which a sorting object is dispensed from a belt that conveys the sorting object. By automatically reciprocating between a dispensing position for dispensing the sorting object to the chute and a standby position for allowing the sorting object to pass around a turning shaft provided at one end, the sorting object is automatically set. A drive device for the diverter having a drive source for driving the dispensing plate by inverter control, and a drive control device for controlling the drive of the drive source, the sorting device comprising: The first frequency current for operating the payout plate at the payout speed required to pay out the chute to the chute is supplied to the first frequency or the payout speed for each sorting object. The current is supplied to the drive source for the current supply time set correspondingly, and at the end of the current supply time, a constant necessary for stopping the payout plate at the standby position regardless of the level of the payout speed. A constant second frequency current for operating the dispensing plate at the stop speed is supplied to the drive source, and after the second frequency current supply starts, before the dispensing plate returns to the standby position. A drive control device for stopping supply of the second frequency to the drive source and stopping the payout plate at the standby position.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A diverter drive control method, a diverter drive control device, a diverter drive device, and a sorting device according to one embodiment of the present invention will be described below with reference to the drawings. Note that the diverter drive control method is as follows.
This is executed for the diverter drive device via the diverter drive control device, and the sorting device includes the diverter drive control device and the diverter drive device. In the present embodiment, the parts that fulfill the functions corresponding to the diverter drive control device are the sorting control device 6 and the inverter device 502. In each of the drawings, the same reference numerals are given to portions performing the same or similar functions.

FIG. 3 shows the structure of the sorting device 40. The sorting device 40 is, for example, a steel belt 5
A sorting conveyor 10 for performing a sorting operation of the packages 30 placed and conveyed on 3 and a supply conveyor 20 for supplying the packages 30 to the sorting conveyor 10 at predetermined time intervals are provided. First, sorting conveyor 1
0 will be described. The sorting conveyor 10 includes a steel belt 53, a diverter 500a,... (Sometimes collectively referred to as “diverter 500”), an inverter device 5
.. (Sometimes generically referred to as “inverter device 502”), chutes 3a... (Sometimes generically referred to as “chute 3”), photoelectric switch 4, encoder 5, and sorting control device 6 It has. In this embodiment, a belt made of a thin steel plate is used so that the diverter 500 can smoothly pay out the luggage 30. However, the present invention is not limited to this. A material that does not cause any trouble can be used.

A plurality of diverters 500a,... Are arranged at one end of the steel belt 53 along the conveying direction of the steel belt 53 at an appropriate interval in the same manner as the above-described conventional diverter 50, and are conveyed. Incoming luggage 30
From the steel belt 53 to the chute 3 is performed. As described above, the diverter 500 includes the payout plate 51, the turning shaft 52, the crank mechanism 55, the rotating plate 56, and the motor 501 that is inverter-controlled as a drive source. The structure of such a diverter 500 is the same as the structure of the diverter 50 except that a motor 501 is provided instead of the brake motor 54 in the above-described diverter 50 and the electromagnetic contactor 57 is removed. Therefore, the description of the structure of the diverter 500 is omitted. By stopping the use of the brake motor 54 and the electromagnetic contactor 57 in this way, periodic maintenance due to wear of the brake, wear of the contact of the magnet for the motor 54, and the like becomes unnecessary. Also, the motor 501
Is a commercially available AC motor driven by inverter control. For example, model number CN is manufactured by Sumitomo Heavy Industries, Ltd.
HM2-4115 or the like can be used. Shoot 3a,
… Means each diverter 500 sandwiching steel belt 53
a,... are arranged. FIG.
Although the case where the set of the diverter 500 and the chute 3 are provided is shown, the present invention is not limited to this, and one or more sets of the diverter 500 and the chute 3 can be provided.

Each of the motors 501,... Provided in each of the diverters 500a, 500b,.
02b,... Are connected. Such an inverter device 5
Are connected to a sorting control device 6 described later. The drive control method of the diverter 500 by the sorting control device 6 and the inverter device 502 will be described later in detail.

The encoder 5 is equivalent to a distance signal transmitting device, and generates a signal for calculating the moving distance of the load 30 placed on the belt 53, for example, a roller that rotates with the driving of the steel belt 53. , And generates a pulse signal in accordance with the rotation of the roller. Such a pulse signal is sent to the sorting control device 6. The photoelectric switch 4 is used to measure the length of the load 30 in the transport direction, that is, the so-called load length.
0 is provided at an appropriate distance in the transport direction from the start end of the sorting conveyor 10 to which 0 is supplied, and its output terminal is electrically connected to the sorting control device 6. The photoelectric switch 4 is connected to the load 30 transported by the steel belt 53.
Is turned on, for example, when it enters the detection range, and turned off when the baggage 30 comes out of the detection range, and sends an ON signal and an OFF signal to the sorting control device 6, respectively. still,
The method of calculating the load length will be described in the following description of the sorting control device 6. The signal generating means for measuring the load length and the like is not limited to the photoelectric switch 4 described above, but may employ various known means capable of performing the above-described operation.

The relationship between the number of pulses of the pulse signal and the distance the steel belt 53 moves is supplied to the sorting control device 6 in advance. Therefore, the sorting control device 6
Calculates the load length of the load 30 based on the number of pulses of the ON / OFF signal supplied from the photoelectric switch 4 and the pulse signal described above. Further, in order to operate the dispensing plate 51 at a dispensing speed necessary for dispensing the luggage 30 to the chute 3 with the dispensing plate 51 of the diverter 500, the sorting control device 6 uses the information on the calculated load length as described above. , The first frequency of the current sent from the inverter device 502 to the motor 501 is determined. That is, as described in the conventional sorting apparatus, the payout plate 5 is operated at a constant operation speed regardless of the length of the load length.
In order to solve the problem that the luggage 30 fails to be dispensed to the chute 3 when the 1 is driven, in the present embodiment, the dispensing speed of the dispensing plate 51 is changed according to the length of the load. In order to make the payout speed variable, the first frequency of the current supplied to the motor 501 is made variable based on the load length information, and the sorting control device 6 determines the first frequency based on the load length information. The payout speed can be defined as the operating speed of the payout plate 51 when driven by the current of the first frequency. further,
In order to always stop the dispensing plate 51 at the standby position 61 regardless of the level of the dispensing speed of the dispensing plate 51, the sorting control device 6
After a predetermined time elapses after the supply of the first frequency current, a current having a fixed second frequency is supplied to the inverter device 502.
To the motor 501. A detector 60 for detecting the detection plate 59 attached to the rotating plate 56 and transmitting a detection signal is connected to the sorting control device 6, and the sorting control device 6 is configured to control the current having the second frequency. Is supplied to the motor 5 based on the detection signal supplied from the detector 60.
The supply of current to 01 is stopped. The motor 50 by the sorting control device 6 and the inverter device 502 described above.
The detailed description of the drive control of No. 1 will be made in the operation description described later.

Each luggage 30 loaded on the belt 53
Must be paid out to the chute 3 by the diverter 500 corresponding to each delivery destination. Therefore, the sorting control device 6 sets the above-mentioned photoelectric switch 4 used for measuring the load length as a reference time for measuring the moving distance for transporting each load 30 to the diverter 500 corresponding to the delivery destination of each load 30. The time when the ON signal is supplied is adopted. As described above, the ON signal transmitted from the photoelectric switch 4 is used to start counting the number of pulses of the pulse signal for measuring the load length, and is also used for measuring the moving distance of the package 30. Used to start counting the number of pulses.
In the following description, the installation position of the photoelectric switch 4 will be described.
To be precise, the sending position of the ON signal is referred to as a “reference position”, and the payout plate 5 of each diverter 500 is referred to from the reference position.
The distance to the predetermined position in No. 1 is referred to as “transport distance”.
The diverter 500a,
.. Are stored corresponding to the transport distance.

The sorting control device 6 is connected to a host computer 8. In the host computer 8,
Sorting destination information related to the delivery destination is supplied in advance from a reading device 81 that reads, for example, a bar code written on the package 30. Accordingly, the sorting destination information, for example, a delivery destination name, for each package 30 is sent from the host computer 8 to the sorting control device 6. The sorting control device 6 refers to the correspondence table between the delivery destinations and the sorting chutes 3 that stores the sorting destination information supplied from the cost computer 8 for each package 30 in advance in the sorting control device 6. By doing so, the number of the chute 3 is converted into the number of the diverter 500 to be operated. By determining the diverter 500 to be operated in this way, the sorting control device 6 allows the diverter 50 to be operated.
The pulse number information corresponding to 0 is searched. Then, when the moving distance information obtained by counting the number of pulses of the pulse signal from the reference time matches the pulse number information, the sorting control device 6 sends the signal to the inverter device 502 of the diverter 500 to be operated. Send a control signal. Therefore, the corresponding inverter device 502 drives the motor 501 of the corresponding diverter 500 according to a control method described in detail below. In this way, each package 30 is sorted by the diverter 500 according to the sorting destination.

Next, the supply conveyor 20 will be described. The supply conveyor 20 is provided with the sorting conveyor 10 described above.
Conveyor 10 which is arranged on a straight line with respect to
Carry the luggage in the same direction as. The supply conveyor 20 includes a resin belt 21, a photoelectric switch 22, and a supply control device 23. The photoelectric switch 22 is connected to the supply control device 23. The supply control device 23 controls the operation of the drive motor of the supply conveyor 20. Incidentally, the photoelectric switch 22 is arranged near the end position of the supply conveyor 20.

The supply control device 23 will be described. The supply control device 23, as in the case of the sorting control device 6 described above, supplies the package 3 conveyed by the supply conveyor 20 based on the ON / OFF signal supplied from the photoelectric switch 22.
Measure the load length of zero. Further, the supply control device 23 controls the adjacent cargo 3 conveyed on the sorting conveyor 10.
In order to supply the packages 30 from the supply conveyor 20 to the sorting conveyor 10 so that the transport time between 0 and 30 'is equal to or longer than a predetermined time, the sorting conveyor 1 sorts a certain package 30.
After the supply to 0, control is performed to temporarily stop the operation of the supply conveyor 20 in order to secure an interval of the predetermined time or more.

The operation of the sorting device 40 configured as described above will be described below. The operation of the sorting device 40 from the loading of the baggage 30 by the supply conveyor 20 to the dispensing of the baggage 30 by the diverter 500 has been outlined in the description of the sorting control device 6 and the like. Only the main process will be described. That is, in step (indicated by “S” in the figure) 1, the barcode attached to each package 30 is read by the reading device, and the information such as the sorting destination is input to the host computer 8 from the reading device. You. In step 2, the load 30 is first loaded into the supply conveyor 20, and is supplied from the supply conveyor 20 to the sorting conveyor 10. In step 3, as described above, the luggage 30 is determined based on the number of pulses of the ON / OFF signal supplied from the photoelectric switch 4 and the pulse signal described above.
Is calculated. In step 4, as described above,
Based on the sorting destination information supplied from the host computer 8, the sorting control device 6 recognizes the diverter 500 to be driven corresponding to the package 30. further,
The sorting control device 6 determines the above-described first frequency and calculates a current supply time, which is a time for supplying the current of the first frequency, based on the calculated length of the package 30 in step 4. I do. That is, in the present embodiment, the sorting control device 6 determines that the load length exceeds 800 mm.
The luggage 30 is recognized as a long object and the payout plate 51 is controlled to be driven at a low speed. On the other hand, when the luggage 30 is 800 mm or less, the luggage 30 is recognized as a short object and the payout plate 51 is driven at a high speed. To control. In the present embodiment, the payout plate 5
1 is driven at low speed, the first frequency of the current supplied from the inverter device 502 to the motor 501 is 30 Hz,
When the payout plate 51 is driven at a high speed, the inverter device 502
The first frequency of the current supplied from the motor to the motor 501 is 90H
z. Therefore, the sorting control device 6 sets the luggage 30
Is determined to be the long object, the sorting control device 6
Selects 30 Hz as the first frequency, and sends a signal to that effect to the inverter device 502 connected to the diverter 500 that sorts the package 30. On the other hand, when the sorting control device 6 determines that the luggage 30 is the short object, the sorting control device 6 selects 90 Hz as the first frequency, and the diverter 500 that sorts the luggage 30.
Is transmitted to the inverter device 502 connected to the communication device. In this embodiment, as described above, the load length is divided into two types and the first frequency is set to two types corresponding to the two types. However, the present invention is not limited to this, and the load length is set to three or more types. And the first frequency can be set to three or more types in correspondence with the above. Further, the first frequency may be obtained by calculation based on the load length information. As described above, according to the sorting device 40 of the present embodiment, the operating speed of the dispensing plate 51 can be changed by the inverter control according to the length of the load length.
Can be surely paid out to the chute 3, and the sorting ability can be improved.

In step 5, as described above, the sorting control device 6 determines whether the moving distance information has reached the pulse number information. When the sorting control device 6 determines that the moving distance information has reached the pulse number information, it sends a control signal to the inverter device 502 of the diverter 500 to be driven in step 6. Therefore, as described later, the diverter 5 to be driven
00 is controlled by the inverter device 502,
The luggage 30 is paid out to the chute 3.

Next, the drive control operation of the diverter 500 by the inverter device 502 in step 6 described above will be described in detail with reference to FIG. Step 61
Then, the sorting control device 6 outputs a signal corresponding to the first frequency and a signal corresponding to the current supply time, which are selected or calculated based on the load length information, as described above. The data is sent to the inverter device 502 connected to the power supply 500. Therefore, the inverter device 502 transmits the current of the first frequency to the motor 50.
Supply to 1. In step 62, the sorting control device 6
Determines whether the current supply time, which is the time during which the current of the first frequency is being supplied to the motor 501, has elapsed. The current supply time is set in accordance with the load length, in other words, the first frequency. In the present embodiment, the current supply time is 0 when the long object, in other words, the payout plate 51 is driven at a low speed. .4 seconds, and 0.13 seconds when driving the short object, in other words, the payout plate 51 at a high speed. FIG.
FIG. 7 shows the speed change of the payout plate 51 when the payout plate 51 is driven at a high speed together with the elapsed time, and FIG. 7 shows the speed change of the payout plate 51 when the payout plate 51 is driven at a low speed along with the elapsed time. “T1” shown in FIG.
"T2" shown in FIG. 7 corresponds to the above 0.4 second.

In step 63, when it is determined in step 62 that the current supply time has elapsed,
That is, at time t1 shown in FIG. 6 and at time t2 shown in FIG. 7, the sorting control device 6 sends out a signal for transmitting the second frequency to the inverter device 502 connected to the diverter 500 that pays out. Here, the second frequency will be described. The diverter 500 of the present embodiment employs a structure in which the output shaft of the motor 501 and the turning shaft 52 of the dispensing plate 51 are connected via the crank mechanism 55 as described above. Therefore, when the stop position of the dispensing plate 51 returning from the dispensing position 62 to the standby position 61 does not match the standby position 61, when the dispensing plate 51 is driven next, the dispensing plate 51 is Standby position 61 that should be located
The operation is started from a position near or far from the payout position 62. On the other hand, the timing to start driving the payout plate 51 is designed based on the case where the payout plate 51 is stopped at the standby position 61. Therefore, as described above, when the stop position of the dispensing plate 51 does not coincide with the standby position 61, the timing at which the luggage 30 should be dispensed to the chute 3 is shifted from the original timing, and the dispensing may fail. Therefore, the payout plate 51
It is necessary to always stop the payout plate 51 at the standby position 61 regardless of the level of the payout speed. Therefore, before the dispensing plate 51 stops, it is necessary to set the speed of the dispensing plate 51 to the same and constant stop speed irrespective of the level of the dispensing speed, and the speed is supplied to the motor 501 for the stop speed. The current frequency is the second frequency. In the present embodiment, the second frequency is fixed at 60 Hz. Therefore, when the payout plate 51 is driven at a high speed, the sorting control device 6 sends the second frequency sending signal from the time t1 shown in FIG. 6 to the inverter device 502 connected to the diverter 500 that pays out. I do. Also, payout plate 5
When 1 is driven at a low speed, the sorting control device 6 sends the second frequency sending signal to the inverter device 502 connected to the diverter 500 that pays out from the time t2 shown in FIG. Therefore, in any case, the inverter device 502 starts supplying the current of the second frequency to the motor 501 from the time t1 or the time t2.
The speed corresponding to reference numeral 71 in FIG. 6 and reference numeral 72 in FIG. 7 corresponds to the payout speed, and the speed corresponding to reference numeral 73 in FIG. 6 and reference numeral 74 in FIG. 7 corresponds to the stop speed. The stopping speeds 73, 74
Are the same speed, as described above.

In step 64, it is determined whether or not the detector 60 has detected the detection plate 59 attached to the rotary plate 56 of the diverter 500 in order to stop the current supply to the motor 501. The reason for providing such a detector 60 will be described. That is, after the supply of current to the motor 501 is stopped, the payout plate 51 continues to move by inertia, but eventually stops due to frictional force. As described above, the stop speed is the same and constant regardless of the payout speed, so the distance that the payout plate 51 moves from the stop of the current supply to the stop of the payout plate 51 is the payout speed. Is constant regardless of the height of the road. Therefore, in order to stop the dispensing plate 51 having the same stopping speed irrespective of the level of the dispensing speed by supplying the current of the second frequency so as to coincide with the standby position 61, the timing of the current supply stop Should be adjusted. Therefore, in the present embodiment, the payout plate 5
When the detector 1 is located at the standby position 61, the detector 60 is installed so that the detector 60 detects the detector plate 59 at a position approximately 3/4 of a rotation from the rotation start position at which the detector plate 59 is located. I have. The stop position of the dispensing plate 51 is the standby position 6
The detector 60 is attached to the support member 63 such that the installation position of the detector 60 can be appropriately adjusted so that the timing of stopping the current supply can be finely adjusted to match 1. In this embodiment, the proximity switch is used as the detector 60. However, the present invention is not limited to this, and it goes without saying that various sensors such as limit switches and photoelectric switches can be used.

In step 65, the inverter device 502
Supply of current from the motor to the motor 501 is stopped. That is, time t3 in FIG. 6 and time t4 in FIG. 7 are times when the detector 60 detects the detection plate 59. Therefore, at time t3 and time t4, a detection signal indicating that the detection plate 59 has been detected is sent from the detector 60 to the sorting control device 6, and
At this time, the sorting control device 6 sets the diverter 500
Is instructed to stop the current supply to the motor 501 to the inverter device 502 that drives the motor 501. Therefore, the inverter device 502 stops supplying current to the motor 501 at time t3 and time t4. Therefore, at time t3
After time t4, the payout plate 51 moves by inertia and stops at the standby position 61.

As described above, in order to stop the dispensing plate 51 at the standby position 61, it is necessary to set the dispensing plate 51 to the above-described stopping speed and stop the current supply to the motor 501 at an appropriate time. It is. Therefore, the step of setting the dispensing plate 51 to the stop speed is not provided, and the dispensing plate 51 is directly moved from the high-speed drive or the low-speed drive to the standby position 61.
The following problems occur when trying to stop at a time. That is, for example, when two types of payout speeds are provided,
The current supply stop detector and the high-speed drive stop,
Two for low-speed drive stop. As described above, it is necessary to provide the number of detectors corresponding to the type of the payout speed to be set. Conversely, there is a limit to the number of detectors that can be installed due to the installation space of the detectors, so the types of the payout speeds that can be set are limited. On the other hand, in the sorting device 40 of the present embodiment, the payout speed can be set to a maximum and stepless, and even in that case, it is sufficient to install one detector, which is a remarkable effect as compared with the conventional device. Can be.

In the embodiment described above, the detector 60
Detects the rotary plate 56 attached to the output shaft of the motor 501, but is not limited thereto.
For example, it may be detected that a member constituting the crank mechanism 55 has reached a predetermined position.

Further, in the above-described embodiment, the plurality of diverters 500 and the chutes 3
Are arranged as an example, but the present embodiment is not limited to this, and the present embodiment can be applied to the case where one diverter 500 and the chute 3 are provided.

[0029]

As described in detail above, according to the diverter drive control method of the first aspect, the diverter drive control apparatus of the second aspect, the diverter drive apparatus of the third aspect, and the sorting apparatus of the fourth aspect of the present invention. The following effects can be obtained, that is, the use of a drive source for driving the payout plate by inverter control can reduce noise and eliminate maintenance. Furthermore, since the first frequency of the current supplied to the drive source of the dispensing plate is made variable and the dispensing speed of the dispensing plate is made variable in accordance with the sorting object, any luggage can be reliably discharged to the chute. . Therefore, the sorting ability of the sorting object can be improved. Further, irrespective of the level of the payout speed, the payout plate is driven once at the same and constant stop speed, and after setting to the stop speed, before the stop, the drive to the drive source of the payout plate is performed. Since the current supply is stopped, the payout plate can always be stopped at the standby position. Therefore, since the operation starting point of the dispensing plate is always the same, the appropriate timing at which the sorted object comes into contact with the dispensing plate when the sorted object can be surely dispensed to the chute is set at the appropriate timing. The contact timing does not shift, and it is possible to reliably pay out any luggage to the chute.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating an operation in a diverter drive control method according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining a sorting operation in the sorting device according to the embodiment of the present invention, which performs the operation shown in FIG. 1;

FIG. 3 is a diagram illustrating a configuration of a sorting device according to an embodiment of the present invention.

FIG. 4 is a plan view of the diverter shown in FIG. 3;

5 is a front view of the diverter shown in FIG.

6 is a graph showing a speed change when the diverter shown in FIG. 3 is driven at a high speed.

FIG. 7 is a graph showing a speed change when the diverter shown in FIG. 3 is driven at a low speed.

FIG. 8 is a diagram showing a configuration of a conventional diverter.

[Explanation of symbols]

3 ... chute, 6 ... sorting control device, 30 ... luggage, 5
DESCRIPTION OF SYMBOLS 1 ... Dispensing plate, 52 ... Revolving shaft, 53 ... Belt, 55 ... Crank mechanism, 56 ... Rotating plate, 59 ... Detection plate, 60 ... Detector, 61 ... Stand-by position, 62 ... Dispensing position, 71, 72 ... Dispensing speed , 73, 74: stopping speed, 500: diverter, 501: motor, 502: inverter device.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65G 47/46 B65G 47/82 B65G 47/76

Claims (11)

(57) [Claims] 1. A dispensing plate (51) of a diverter (500) provided opposite a chute (3) from which a material to be sorted is discharged from a belt (53) for conveying the material to be sorted (30). A dispensing position (62) for dispensing the sorting object to the chute around a turning shaft provided at one end of the dispensing plate, and a standby position (6) for passing the sorting object.
A drive control method for a diverter of a sorting apparatus that automatically sorts the objects to be sorted by reciprocatingly oscillating at a drive source (501) that drives the dispensing plate by inverter control between the diverter and 1). The current of the first frequency for operating the dispensing plate at a dispensing speed required for dispensing the sorting object to the chute is set to the first frequency or the dispensing speed for each sorting object. Supply to the drive source at a current supply time set correspondingly, and at the end of the current supply time, a constant necessary for stopping the payout plate at the standby position regardless of the payout speed. A constant second frequency current for operating the dispensing plate at the stop speed is supplied to the drive source, and after the start of the second frequency current supply, the dispensing plate returns to the standby position. To, the payout plate is stopped in the waiting position by stopping the supply of said second frequency to said drive source,
A diverter drive control method, characterized in that: 2. Before the sorting object is discharged by the diverter, a load length, which is the length of the sorting object in the transport direction, is measured for each sorting object, and based on the measured load length. The payout speed and the first speed corresponding to the payout speed.
2. The diverter drive control method according to claim 1, wherein a frequency is determined for each of the objects to be sorted. 3. A dispensing plate (51) of a diverter (500) provided opposite a chute (3) from which the sorting object is discharged from a belt (53) for conveying the sorting object (30). A dispensing position (62) for dispensing the sorting object to the chute around a turning shaft provided at one end of the dispensing plate, and a standby position (6) for passing the sorting object.
A drive control device for a diverter of a sorting device that automatically sorts the objects to be sorted by reciprocatingly oscillating at a drive source (501) that drives the dispensing plate under inverter control with respect to 1). The current of the first frequency for operating the dispensing plate at a dispensing speed required for dispensing the sorting object to the chute is set to the first frequency or the dispensing speed for each sorting object. Supply to the drive source at a current supply time set correspondingly, and at the end of the current supply time, a constant necessary for stopping the payout plate at the standby position regardless of the payout speed. A constant second frequency current for operating the dispensing plate at the stop speed is supplied to the drive source, and after the start of the second frequency current supply, the dispensing plate returns to the standby position. To, the payout plate is stopped in the waiting position by stopping the supply of said second frequency to said drive source,
A diverter drive control device, characterized in that: 4. The method according to claim 1, wherein the first frequency measures a load length, which is a length in the transport direction of the sorting object, for each sorting object before the sorting object is paid out by the diverter. 4. The diverter drive control device according to claim 3, wherein the payout speed and the diverter drive control device are determined for each of the sorted objects in accordance with the payout speed based on the load length. 5. A diverter drive device whose operation is controlled by the diverter drive control device according to claim 3 or 4, wherein: a drive source (501) to which currents of the first frequency and the second frequency are supplied; Rotating plate (56) that rotates with the output shaft of the drive source
Connecting a part of the peripheral edge of the rotating plate and the pivot of the dispensing plate, and reciprocatingly swinging the dispensing plate between the standby position and the dispensing position in response to one rotation of the rotating plate. A diverter driving device, comprising: a crank mechanism (55) for moving. 6. A dispensing plate (51) of a diverter (500) provided opposite a chute (3) from which a material to be sorted is discharged from a belt (53) for conveying the material to be sorted (30). A dispensing position (62) for dispensing the sorting object to the chute around a turning shaft provided at one end of the dispensing plate, and a standby position (6) for passing the sorting object.
A sorting device for automatically sorting the objects to be sorted by reciprocatingly swinging between them, and a drive source (5) for driving the dispensing plate under inverter control.
01) (55, 5)
A driving control device for controlling the driving of the driving source, wherein the first frequency for operating the dispensing plate at a dispensing speed necessary for dispensing the sorting object to the chute is provided. Is supplied to the drive source at a current supply time set in accordance with the first frequency or the payout speed for each of the sorting objects, and at the end of the current supply time, Supplying a current of a constant second frequency for operating the dispensing plate at a constant stop speed necessary for stopping the dispensing plate at the standby position regardless of the height to the drive source; After the start of the two-frequency current supply and before the dispensing plate returns to the standby position, the supply of the second frequency to the drive source is stopped to stop the dispensing plate at the standby position.
And a drive control device (6, 502). 7. A load length measuring device (4, 6) for measuring a load length, which is a length in the transport direction of the sorting object, for each sorting object before the sorting object is discharged by the diverter. 7. The sorting according to claim 6, wherein the drive control device determines the payout speed and the first frequency corresponding to the payout speed for each of the objects to be sorted based on the measured load length. apparatus. 8. The drive control device stops the supply of the current of the second frequency to the drive source, and detects that the payout plate or a component of the diverter drive device has reached a predetermined position. The sorting device according to claim 6 or 7, further comprising a detector (60) for sending a signal for stopping supply of the second frequency to the drive control device. 9. The divertor driving device, comprising: a driving source (501) to which currents of the first frequency and the second frequency are supplied; and a rotating plate (56) that rotates together with an output shaft of the driving source.
Connecting a part of the peripheral edge of the rotating plate and the pivot of the dispensing plate, and reciprocatingly swinging the dispensing plate between the standby position and the dispensing position in response to one rotation of the rotating plate. The sorting device according to any one of claims 6 to 8, further comprising a crank mechanism (55) for moving. 10. The dispensing plate moves by inertia and stops at the standby position after the supply of the second frequency current to the drive source is stopped by the drive control device. The sorting device according to any one of the above. 11. When a plurality of the diverters and the chutes are arranged along the transport direction of the to-be-sorted objects, sorting destination information indicating a chute from which each to-be-sorted object is paid out is further provided for each of the to-be-sorted objects. And the sorting destination input device (8) for sending the sorting destination information to the drive control device.
1) and a distance signal transmitting device (5) for transmitting a distance signal for calculating the moving distance information from the reference position for each of the sorting objects put on the belt to the drive control device. The drive controller stores in advance the relationship between each sorter information and the transport distance information from the reference position to the position where each diverter is arranged, and the transport distance obtained from the supplied sorter information. 11. The sorting device according to claim 6, wherein the diverter corresponding to a sorting destination of each sorting object is driven based on the information and the moving distance information calculated based on the distance signal.