JPS6045090B2 - Control method for loading objects into a transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling the loading of articles from a plurality of rotors onto a conveyor in a sorting device or the like.

That is, in a conveyor device that includes a conveyor, such as a tray conveyor, whose loading location for transported objects is fixed with respect to the direction of conveyance, and a plurality of rotors for loading transported objects in the direction of the conveyor path, which are connected to this conveyor, the transported objects are This article relates to a control method for loading each rotor onto a conveyor.

Conventionally, in the above-mentioned conveying device, each rotor has a fixed location for loading items on the conveyor, such as a tray, so if there is a slight delay in work on the rogue side, the rotor As a result, the tray on which the conveyed items should be loaded passes through, and the conveyor has to wait until the timing to load the next corresponding tray arrives, resulting in a large drop-off phenomenon on the conveyor, which greatly reduces work efficiency. It was the cause.

Further, the above-mentioned conventional sorting apparatus has disadvantages such as requiring a large number of on-site control devices, for example, requiring a tray detector for each rotor.

The present invention has been made to solve the above-mentioned problems, and preferred embodiments thereof will be described below with reference to the attached illustrative drawings.

J In Fig. 1, 1 is a main conveyor having trays that can be turned over in a continuous state, and 2A to 2D are main conveyors 1.
This rotor is used to load items onto the tray.

3A to 3X are sorting chutes, each of which is provided with actuators 4A to 4X for selectively overturning the trays.

5 is a tray detector, 6 is a pulse generator operated in conjunction with the main conveyor 1, 7A to 7D are sorting destination setting devices operated by a keyer, and 8 is a control computer.

Each of the rotors 2A to 2D is composed of a timing conveyor 9, an acceleration conveyor 10, and a final conveyor 11, respectively, as shown in FIG.
2 onto the timing conveyor 9 and once stopped.

The sorting destination of this conveyed object is set in the setting devices 7A to 7D by a keyer while being conveyed on the key-in conveyor 12. The timing conveyor 9 is activated by a loading start command from the computer 8, and the article is fed onto the acceleration conveyor 10, where it is accelerated and conveyed steplessly from 40rT1/Mjn to 120m/Min. Since the final conveyor 11 has a speed of 120n1/Min, the relative speed when transferring to the final conveyor 11 is zero, there is no slip of the conveyed items on the rotor, and the conveyed items are smoothly transferred to the tray 13 on the main conveyor 1. . As shown in FIG. 3, the acceleration conveyor 10 is a belt conveyor having a driving means composed of an induction motor 14, an acceleration induction clutch 15, a reduction leaf induction clutch 16, a reduction gear 17, etc. is running at a speed of 401T1/Mjn.

A speed curve voltage is generated in the acceleration/deceleration curve generation circuit 18 in accordance with the cutting speed command from the computer 8, and a comparison between the voltage level from the tacho generator 19 for conveyor speed detection and the speed curve voltage level is performed in the subtraction circuit 20. The thyristor trigger circuit 2 for driving the acceleration/deceleration induction clutches 15 and 16 is set so that the voltage level 3 from the tacho generator 19 follows the speed curve.
1 and 22 are selectively operated, and the clutch 15 or 1
By controlling the excitation voltage No. 6, four acceleration cycles from 40rn/Mjn to 120rr]/Mjn and the reverse deceleration cycle are controlled. On the other hand, main conveyor 1
As shown in FIG.
17OrTl/Minl5Onl/Min).

Conventionally, when changing the speed of the main conveyor in this type of sorting device, it was difficult to synchronize it with the rotor side conveyor, but in this embodiment, the acceleration time setting device 25 shown in FIG. (40rr1/Min to 120n1/M
Either the length of time it takes to reach Puffer conveyor 9 can be automatically changed in accordance with the speed change of the main conveyor 1, or the timing for starting the timing puffer conveyor 9 can be changed by a loading start command as shown in Fig. 2. , a timing adjustment means 26 that is controlled in conjunction with the speed switching of the main conveyor 1.
By automatically selecting this, it is possible to move the conveyed object onto a predetermined tray without any support even if the speed of the main conveyor 1 is changed. That is, the speed of the main conveyor 1 is 100 m/Mi
Even if the conveyed items are dropped from n to 70n1/Min or 50n1/Min, the conveyed items are accelerated steplessly to the transfer speed 1201T]/Min that matches the main conveyor speed 100rT1/Min and are sent onto the tray, but the main conveyor speed If the speed has become low, the timing of feeding the conveyed material by the timing conveyor 9 is delayed or the acceleration conveyor 10
By increasing the time required for acceleration to n,
It is possible to transfer the conveyed object onto a predetermined tray in a timely manner. If the speed of the main conveyor 1 can be changed as described above, the conveyance speed can be selected according to the amount of conveyance, and unnecessary reduction in machine life and failure can be prevented.

Next, a method of controlling the sorting device configured as described above will be explained.

Note that all counting is done in trigonometric numbers, and all the counts described below are in trigonometric numbers (1...9, M, B...F,
lO). As shown in FIG. 4, the pulse signal from the pulse generator 6 is thinned out by the thinning processing means 27,
A pulse is output to the next stage at every passing time of a unit distance corresponding to the total length of the tray (equal to the tray pitch). The pulses thinned out in this manner are counted by the first counter 28. On the other hand, this pulse is counted by the second counter 29 and set by the detection signal from the tray detector 5 (see the graph shown in FIG. 4). That is, the count is counted up to F, and the length is increased to O by the tray detection signal. or,
Detection signals from the tray detector 5 are counted by a pointer 30. This pointer 30 returns to O after counting the number of trays, and repeats counting the detection signal from 1 again. The tray control table 31 includes a data writing section corresponding to each of all trays, and one data writing section. Two words can be written per reading section.

The first word is written with the value of the first counter 28 at the timing of operating the tray overturning actuator, and the second word is written with the value of the first counter 28 at which the tray overturning actuator is activated. is written.

Now, let Tsec be the time from when the timing conveyor 9 is started until the conveyed object is transferred onto the tray, and if the speed of the main conveyor 1 is 100rT1/Min, then the distance that the tray travels in Tsec is the tray pitch (1.2rT1 )
If we divide by t = 2 sec, then the number of 1.5 is 2. It becomes D.

Therefore, as shown in FIG. 4, considering the rotor 2A, the distance from the transfer point is 2. If the rotor 2A is started when the tray comes backward by distance D, the conveyed object can be transferred onto the tray 13A.

On the other hand, when the tray pitch is set based on the transfer point of the rotor 2A as shown in FIG. Corresponds to the position 6/16 from. If this condition is satisfied, the position of the tray detector 5 can be moved to an arbitrary position, but since this will not affect the counting state of the second counter 29, the tray is detected at the K position where the tray 13A can be detected. Considering that the tray detector 5 is moved, the tray detector 5 is located at a distance of 2.0 mm from the transfer point of the rotor 2A. 9/ from the front end of the tray 13A whose front end is located at a distance D to the rear.
Therefore, by starting the rotor 2A when the value of the second counter 29 is 9, it is possible to move the conveyed object sent out by this rotor 2A onto the tray 13A. It can be done. 2 digits (A) for each rotor 2A to 2D. 0
~F. F) Digital switches 32A to 32D for adjusting the loading timing are provided, and the digital switch 32A corresponding to the rotor 2A is set to 0.9. On the other hand, the rotor
Loader pitch between 2A to 2B, 2C, 2D (
(calculated based on the number of trays) are 2.3 and 2.3, respectively, as shown in Figure 4.
3. A, 5.8, the digital switch 32B corresponding to rotor 2B has 2. Set C, rotor-2C
The digital switch 32C corresponding to the rotor 2D is set to 4.3, and the digital switch 32D corresponding to the rotor 2D is set to 6.1.

When the second counter 29 is C, the rotor 2B
, when 3, rotor 2C, and when 1, rotor 2C.
All you have to do is start 2D. At this time, the numerical value in the upper digit of each digital switch indicates the number of detections by the tray detector 5, ie, the number of steps of the pointer 30, while the tray at the position indicated by 13A advances by the rotor pitch.

In other words, the tray indicated by 13A is 0.7 (=1.0-0.9)
The first detection operation is performed when the
The number of remaining detection operations to be performed while traveling the distance minus 0.7 from the loader pitch is calculated, and the number of detection operations added to the first one becomes the upper digit value of each digital switch. l Sorting destination chute No. to the tray control table 31. Writing is performed as follows.

That is, for each rotor, a corresponding digital switch 32A
Subtract the number of high-order digits of ~32D from 10, respectively. As for the rotor 2A, the sorting chute number set by the setting device 7A. At the start timing of rotor 2A, the data write position on the tray system table 31 corresponding to the value of the pointer 30 at that time is +
Write to the first data write position.

Similarly, for rotor 2B, the value of pointer 30 +E
For rotor 2C, the value of pointer 30+Cth data writing position is set at the data writing position.
- As for the loader 2D, the sorting chute No. Write. In this way, the arrangement of the objects to be transported on the tray and the arrangement of the information on the tray control table become equal.

The value of the first counter 28, that is, the operation timing information of the tray overturning actuator at the sorting destination is written to the tray control table 31 as follows.

That is, chute No. 3 is placed at the data writing position of the tray control table 31 corresponding to the value of the pointer 30. Check whether it is written.

If it is written, the distance value to that chute (the number of pulses emitted while the tray advances from the fixed place P where the corresponding tray is located to that chute...the thinning processing means 27 The number of pulses processed) is added to the value of the first counter 28 at that time, and this value is calculated as the shoot number. Write to the data write position where is written. Therefore, the distance value is constant for each shot, and only one set is required regardless of the increase or decrease of the rotor. computer 8
The built-in controller is always connected to tray control table 3.
1 is searched, and it is checked whether there is any information that matches the value of the first counter 28. If there is matching information, the sorting chute number written in the same data writing position as that information is checked. For example, a train that operates a 3A actuator 4A. 2) Sends a fall command.

When resetting the actuator, the information on the next data writing position on the tray control table 31 is checked, and if the data is destined for the same chute, the actuator is not reset. Reset the actuator like this.
If the actuator is determined based on the sorting destination of the conveyed items on the succeeding trays, instead of operating the actuator for each tray when conveyed items to the same destination flow continuously. The actuator is kept in a continuous operating state (fixed state) until all of the trays carrying the objects have passed, thereby reducing the operating frequency and extending the life of the machine. Next, a series of effects will be explained.

Now, the conveyed object is conveyed to rotor 2C, and the rotor 2
Assume that the vehicle stops on the timing conveyor 9 of C. The code group of the chute 3D to which the transported objects are sorted is set in the setting device 7C by the keyer. In such a state, the value of the second counter 29 is
When the number of lower digits set in C, ie, 3, is reached, the computer 8 issues a loading start command to the rotor 2C, and the timing conveyor 9 is activated. At this time, the fact that the sorting destination is the chute 3D is written at the +C-th data writing position from the data writing position 9 on the tray control table 31 indicated by the pointer 30. When a conveyed object is transferred from the timing conveyor 9 to the acceleration conveyor 10, an acceleration command is sent from the computer 8 to the rotor 2C of this 7, and the acceleration conveyor 10
is accelerated by 120n1/Min in a predetermined acceleration cycle, and the conveyed object is sent to the final conveyor 11 at the same speed at a speed of 120111/Mjn.

Then, by this final conveyor 11, the paper is transferred onto a predetermined tray on the main conveyor 1. At this time, the tray is moved backward from the transfer point from the rotor 2C when the timing conveyor 9 is started. The tray 13C is located at a distance of D. As the tray 13C moves, the value of the pointer 30 increments, and the data writing position on the tray control table 31 that it points to sequentially increments. Then, when the tray detection operation is performed C times after the timing conveyor 9 of the rotor 2C is started, that is, when the tray 13C reaches the fixed location P, the pointer 30 moves to the destination chute 3D (7) NO. Instructs the data writing position of the tray control table 31 in which the data has been written, and according to the check that 1 data has been written at this time, the sorting destination chute 3D written from a certain place P
Pick up the distance value X from the distance value table,
The value X+Y obtained by adding the indicated value X of the first counter 28 at that time is the value X+Y of the sorting destination chute 3D (7) NO. is written to the data write position where the data is being written. When writing the operation timing information of the tray overturning actuator, all trays will be located at a fixed location P, no matter which rotor the tray receives the conveyed object from. For example, the first tray detection operation is performed when the tray that receives the conveyed object from rotor 2A has advanced by 0.7 from the position indicated by 13A, and the tray has moved forward by 15 tray pitches from the position indicated by 13A. is a fixed location P. That is, a total of 16
When the tray detection operation is performed twice (W advance), the tray 13A has reached the fixed place P, the pointer 30 advances by +10 (W advance), and therefore the pointer 30 writes the sorting destination information. This will indicate the data write position, which is located at the +1 position. Also, the tray that receives the conveyed items from the rotor 2C is 0. The first tray detection operation is performed when the tray has advanced by D, and when the tray has advanced by 11 tray pitches from this point, the saw position P is reached. That is, a total of 12 times (1
When tray detection operation is performed (0 base), tray 13
As C reaches a certain place P, the pointer 30 is +C
The pointer 30 increments by (1), and therefore the pointer 30 points to the data writing position at the +C position where the sorting destination information is written. Similarly, the tray that receives the conveyed items from rotor 2B is moved upward from the transfer point of rotor 2B. The tray detection operation is performed 14 times from a position D away.As the tray moves forward, it reaches a certain place P. During this time, the pointer 30 advances by +E and reaches the +E position where the sorting destination information is written. This will indicate the data write position according to the specified data. Furthermore, the same can be said about the rotor 2D. As is clear from the above explanation, all the distance values can be calculated starting from a fixed place P,
Unique for each shoot and independent of the rotor.

As the tray 13C advances, the value of the first counter 28 also increments, and when the value becomes equal to the written value X-Y, that is, when the tray 13C reaches the chute 3D, a message is sent from the computer 8. A tray overturning command that activates the actuator 4D of the chute 3D is output, the tray 13C overturns on the entrance of the chute 3D, and the conveyed object is lowered onto the chute 3D as set.

The sorting control of conveyed items from the other rotors 2A, 2B, and 2D is performed in the same manner as described above, but in order to prevent double loading into the same tray, when the timing conveyor 9 is started, the chute NO. Tray control table 3 to write
Check the data writing position on 1 and select shoot no.
．． If the information has already been written, it indicates that the conveyed object has already been transferred from the upper rotor onto the tray to which the counter-transferred object is to be transferred, so chute No. Writing of information and starting of the timing conveyor 9 is canceled.

This kind of control eliminates the need to fix a transfer tray for each rotor, gives each rotor a chance to start loading one tray at a time, and allows for efficient sorting work without the accident of double loading. . However, the above method allows loading operations to be concentrated on specific rotors.

Therefore, if necessary, it is also possible to balance the input of conveyed items between rotors by using a method that restricts the input of conveyed items from the same loader until it has passed several trays after the loaded items. . In addition, by checking the number of operating rotors and changing the value of the above-mentioned passing tray number setting counter, it is possible to balance the speed of the main conveyor 1 and ensure that all trays are filled with conveyed items without letting the trays idle. It is also possible to have it inserted. In the past, it was common to overturn all the trays on the final chute, assuming that the conveyed items were not sorted into the sorting destination chute, but in this case, the noise of all the trays overturning was seen as a problem.

If this is configured so that the final chute detects and selects only the trays that are being transported and overturns them, not only will the noise problem be solved, but the service life of the equipment will also be reduced due to unnecessary operation. Can be prevented. A loader select dial is attached to each of the setting devices 7A to 7D for inputting the sorting destination of conveyed items, so that even if one setting device fails, the setting device belonging to another rotor will back up. obtain. The loading timing from each rotor to the tray and the actuator activation timing of each sorting destination chute can be easily adjusted by simply changing the set values of the digital switches 32A to 32D.

As described above, the method of the present invention can be effectively implemented in a sorting device, etc., and its feature is that the roller is placed at one of the conveyed material loading locations (trays in the embodiment) that pass through a certain position on the conveyor path. A detector (in the embodiment, the tray detection unit 5) is provided to output one detection signal for each tray, and is composed of a pulse generator 6 and a thinning processing unit 27 in conjunction with the conveyor. ) generates pulses in a cycle that divides one pitch of the conveyed goods loading place into a plurality of plurality, and provides a counter (second counter 29 in the embodiment) that counts the pulses and is cleared by a detection signal from the detector, The loading start timing of each rotor is set for each rotor based on the count value of the counter, and data writing positions are provided corresponding to each conveyed article loading location on the conveyor in synchronization with the loading start of this rotor. Information such as sorting destination is stored in each data writing position of the control table in an arrangement that corresponds to the arrangement of the conveyed items on the conveyor, and when this information should be stored, the information that has already been written in the corresponding data writing position is At some point, the rotor loading start is aborted.

According to the method of the present invention, as shown in the examples,
There is no need to allocate a loading location for conveyed items on the conveyor for each rotor and fix the loading location where the conveyed items should be loaded from each rotor. As long as there is no loading area, objects can be loaded randomly from any rotor in a timely manner, and the loading area on the conveyor can be used efficiently to carry out efficient conveyance work. Furthermore, according to the control method 2 of the present invention, the counter count value used for setting the loading start timing for timely loading of the conveyed articles from each rotor to the conveyed article loading location is such that each conveyed article loading location moves by one pitch. The maximum value is extremely small (in the example, 16 in w-adic) compared to the count value that continuously advances while the conveyor path goes around the conveyed material loading location. Therefore, it is convenient in terms of memory and control, and together with the fact that it is only necessary to install a detector at the conveyed material loading location at the conveyor installation site regardless of the number of rotors, it is economical to implement. I can do it.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an explanatory diagram of the overall configuration, FIG. 2 is an explanatory diagram showing the relationship between the rotor and the conveyor, and FIG. 3 is a diagram illustrating the rotor acceleration conveyor control system. , FIG. 4 is an explanatory diagram of the control system of the rotor and tray overturning actuator. 1... Main conveyor, 2A to 2D... Rotor, 3A
~3X... Sorting chute, 4A~4X... Actuator for tray overturning, 5... Tray detector, 6...
...Pulse generator, 7A to 7D...Setting device, 8...
Computer, 9... Timing conveyor, 10...
・Acceleration conveyor, 11...Final conveyor, 12
...Key-in conveyor, 13...Tray, 28...
・First counter, 29...Second counter, 30・
...Pointer, 31...Tray control table, 32
A~32D...Digital switch.

Claims (1)

[Claims] 1. In a conveyor device equipped with a conveyor equipped with loading places for conveyed goods at equal intervals, and a plurality of loaders installed in the direction of the conveyor path for loading the goods on the loading places for conveyed goods, A detector is provided for outputting one detection signal for each of the conveyance loading places that pass a certain position, and one pitch of the conveyance loading place is divided into a plurality of pulses from a pulse generating means interlocked with the conveyor. A counter is provided that generates pulses, counts the pulses, and is cleared by the detection signal of the detector, and sets the loading start timing of each loader for each loader based on the counted value of the counter. At the timing of the start of loading, information such as the sorting destination is written to each data writing position of the control table, which has a data writing position corresponding to each conveyance object loading location on the conveyor, in an array that corresponds to the arrangement of the conveyed objects on the conveyor. and when it should be remembered,
A method for controlling the loading of objects into a conveying device, characterized in that when there is information already written in a corresponding data writing position, the loading start of the loader is stopped.