JPH03243517A - Control device for start of conveyor - Google Patents

Abstract

PURPOSE:To shorten time and improve efficiency in the control device for a conveyor to start in order and stop in order due to an interlocking operation command by tracking the most extreme end position and memorizing the data at detecting carrying-in of a load on the uppermost stream conveyor, and selecting a conveyor to firstly start due to the interlocking operation command. CONSTITUTION:At detecting a load carried in with a load meter 18 and a load detecting means 12 provided on the uppermost stream conveyor 1, the detection is input to a load tracking and memorizing means 14. The load tracking means 14 tracks to where the load on the conveyor is transported due to the signal of the load detecting means 12 and an interlocking operation command 13, and memorizes the distance TD. A conveyor start selecting means 15 selects a conveyor to firstly start among conveyors 1, 3, 5, 7, 9 based on the interlocking operation command 13 and the distance TD, and inputs the result to a conveyor operation judging means 16. The judging means 16 drives the selected conveyor through a conveyor driving means 17. By this constitution, the load can be transported in the shortest time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a conveyor start control device that performs sequential start and sequential stop according to an interlocking operation command.

(Conventional technology) An example of a conventional conveyor starting control device is shown in FIG.

In FIG. 3, when the interlocking operation command 13 is given, the conveyor operation determination means 16 determines the operation of the most downstream conveyor 9, and transmits the operation command for the conveyor 9 to the conveyor driving means 1.
7, and the output of the conveyor drive means 17 drives the conveyor 9 via the conveyor drive motor 10.

Furthermore, when the conveyor driving means 17 detects the startup completion signal of the conveyor 9 and inputs this output to the conveyor operation determining means 16, the conveyor operation determining means 16 determines the next operation of the conveyor 7, and issues an operation command for the conveyor 7. is applied to the conveyor drive means 17 to drive the conveyor 7 via the conveyor drive motor 8, and thereafter such control is sequentially repeated to operate up to the most upstream conveyor 1 to convey the load.

(Problem to be solved by the invention) In this case, if the conveyor is operated in conjunction when there is no load on the conveyor, or even if there is a load but there is no load halfway as shown in Figure 3, the most downstream conveyor Since the conveyors are started sequentially, it takes time to start the conveyors, which causes a problem in that it takes a long time for the cargo to arrive at the destination.

Furthermore, since the conveyor system is started from the most downstream conveyor, there is a problem in that the downstream conveyor operates in vain until the cargo arrives.

The present invention has been made in consideration of the above problems.

The purpose of the present invention is to provide a rational conveyor start control device that efficiently transports loads to a destination in the shortest possible time.

[Structure of the invention]

(Means and effects for solving the problem) In order to achieve the above object, the present invention provides a conveyor starting equipment that performs sequential starting and sequential stopping based on interlocking operation commands.
Load detection means detects the presence or absence of a load using a load meter installed on the most upstream conveyor, and load tracking tracks how far the load has been conveyed based on the interlocking operation command and the output of the load detection means, and stores this tracking data. data storage means, and conveyor start selection means for selecting which conveyor should be started first when an interlocking operation command is given based on the output of the interlocking operation command and the load tracking data storage means; This is a conveyor start control device that efficiently transports cargo to its destination in the shortest possible time.

In other words, when an interlocking operation command is given, how far along the conveyor the leading edge of the load has traveled is determined from the tracking data, the distance from the leading edge of the load to the end of the conveyor where the leading edge of the load is located is calculated, and then the next downstream Calculates the distance the load is transported during the conveyor startup time, and if the distance calculated by this calculation is smaller than the distance from the tip of the load to the end of the conveyor where the tip of the load is located, When the distance from the leading edge of the load to the end of the conveyor where the leading edge of the load is located is equal to the distance conveyed by the primary downstream conveyor during activation, the next downstream conveyor is activated, and the leading edge of the load is Conveyors upstream of a certain conveyor are started using the conventional sequential start method,
This allows the cargo to be transported to the destination in the shortest possible time and efficiently.

(Example) An embodiment of the present invention is shown in FIG.

In Fig. 1, a load cell 1 installed on the most upstream conveyor 1
Load detection means 1 connected to 8 to detect the presence or absence of load IT.
The output of No. 2 is input to the load tracking data storage means 14, and the load tracking data storage means 14 tracks how far the load on the conveyor has been conveyed based on the interlocking operation command 13 and the output of the load detection means 12. Store the distance TD.

Next, the outputs of the interlocking operation command 13 and the load tracking data storage means 14 are input to the conveyor start selection means 15 which determines which conveyor should be started first when the interlock operation command 13 is given. The output of 15 is input to the conveyor operation determining means 16 to determine the operation of the selected conveyor, give an operation command for the selected conveyor to the conveyor driving means 17, and the output of the conveyor driving means 17 determines the operation of the selected conveyor. Drive via corresponding conveyor drive motor.

Furthermore, the start completion signal 19 of one selected conveyor is detected by the conveyor drive means 17, and is returned to the conveyor operation determination means 16 as the next conveyor start condition.

Hereinafter, with reference to FIG. 2, a method of determining which conveyor should be activated first by the conveyor activation selection means 15 will be described.

As described above, the load tracking data storage means 14 stores the distance TD from the load meter position to the tip of the load at the end of the previous conveyor operation.

In the case of Fig. 2, this distance TD is T when the length of Ncil conveyor 1 is LL and the length of &2 conveyor 3 is L2.
D>L,, TD<L.

Therefore, it is determined that the leading end of the load is above the &2 conveyor 3.

Also, from the tip of the load on &2 conveyor 3 to &2 conveyor 3
The distance L to the end of is L = (L + L2) -TD...
■It is given by.

Also, the time from start to completion of start of &3 conveyor downstream of &2 conveyor 3 is t3, and the conveyance speed of the conveyor is V. Then, the distance Lt that the tip of the load on the &2 conveyor is conveyed until the Na3 conveyor completes startup is Lt, :VoXt, ......-(21
becomes.

Here, L and Lt obtained by formulas ■ and ■ are compared, and if Li>Lt3 holds true, the interlocking operation command 1
3 is given, it can be seen that even if the Nα2 conveyor 3 is started before the No. 3 conveyor 5, there will be no jam, and therefore the Nα2 conveyor can be started first.

If Lt does not hold true, there is a risk of cargo clogging, so it is necessary to start the Na 3 conveyor 5 first.

By starting the Nα2 conveyor 3 when Lx)Lt is established, and starting the Nα3 conveyor 5 when Lt=Lt, the load can be transported downstream without clogging with the most economical operation.

When the operator issues the interlocking operation command 13, from the TD which is the output of the load tracking data storage means 14, for example, if TD>L and TD<L, the tip of the load is Na.
2 is determined to be on the conveyor 3, and L is determined from the above formula (2), and Lt is determined from the above formula 0 (in this case, for example, L), if Lt, the conveyor start selection means 15 The fact that the &2 conveyor 3 has been selected is outputted to the conveyor operation determining means 16, and the conveyor operation determining means 16 gives a command to start the No. 2 conveyor 3 to the conveyor driving means 17, and the output of the conveyor driving means 17 drives the Nα2 conveyor. Nα2 conveyor 3 via electric motor 4
drive.

Furthermore, when t=Lt, the conveyor start selection means 15 outputs the selection of &3 conveyor 5 to the conveyor operation determination means 15, and similarly to the case of Nα2 conveyor 3, the &3 conveyor drive motor 6 is activated. The Nα3 conveyor 5 is operated through the Nα3 conveyor 5.

If this is repeated sequentially to operate up to the most downstream conveyor 5 conveyor 9, and on the other hand, the NC11 conveyor 1 upstream of the Nα2 conveyor 3 is operated in the same sequence start method as in the conventional case, it will be possible to achieve this in the shortest time and efficiently. The cargo can be transported to the destination.

〔Effect of the invention〕

As explained above, according to the present invention, in conveyor drive equipment that starts and stops in sequence based on interlocking operation commands, by starting each conveyor based on load tracking data, loads can be efficiently transported in the shortest possible time. It becomes possible to transport it to the destination location.

[Brief explanation of drawings]

Fig. 1 is a system diagram showing an embodiment of a conveyor start control device according to the present invention, Fig. 2 is a diagram showing the remaining state of loads on the conveyor, and Fig. 3 is a system diagram showing an example of a conventional conveyor start control device. It is a diagram. 1...Nα1 Conveyor 2...&1 Conveyor drive motor 3...&2 Conveyor 4...Na 2 Conveyor drive motor 5...Na 3 Conveyor 6...Na 3 Conveyor drive motor 7...Nci4 Conveyor 8 Pa/Nu 4 Conveyor drive motor 9...N[L5 Conveyor 10...NQ5 Conveyor drive motor 11...Load 12...Load detection means 13...Interlocked operation command 14...Load tracking Data storage means 15...
Conveyor start selection means 16...Conveyor operation determination means 17...Conveyor drive means 18...Load cell 19...Conveyor start completion signal

Claims (1)

[Claims] In a conveyor start control device that sequentially starts each conveyor of a conveyor facility that continuously transports loads by multiple conveyors arranged in series based on an interlocking operation command, the load is transferred to the conveyor via a load meter installed on the most upstream conveyor. load detection means for detecting that the load has been carried into the equipment; tracking data storage means for tracking the position of the tip of the load from the output signal of the load detection means and storing the data;
Conveyor start selection means for selecting a conveyor to be started first to convey the leading end of a load when an interlocking operation command is given from the output signal of the tracking data storage means. Control device.