JPS60137519A - Controlling device of carrying table - Google Patents

Abstract

PURPOSE:To set steel plates on a carrying table at specified intervals by simple control by measuring the carried length of a steel plate of downstream side carrying table when the tail end of the steel plate is detected by a detector, and stopping the table at a specified value. CONSTITUTION:When the steel plate 30 is carried downward shown by the arrow by the carrying table and its front end is detected by a detector 33, a carrying controller 35 counts output pulse of a pulse generator 25, and stops counting when the detector 33 detects the tail end of the steel plate 30 and measures the length of the steel plate 30. The carrying controller 35 determines intervals for the length of steel plate, and gives speed command S3 to stop the table 20 when the carrying table 20 is carried the steel plate by that interval after detection of the tail end of the steel plate. When the next steel plate is carried in, the carrying controller 35 starts the table 20 when the detector 33 detected the front end, and at the same time, starts measuring the length of the steel plate. This operation is repeated hereafter. Thus, steel plates on the table 20 are placed while keeping specified intervals according to the length and carried to a lifting crane.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a control device for a general feed table installed in a steel plate finishing process.

PRIOR ART AND PROBLEMS In general, steel plates that have undergone the two-culm and shearing processes have a size required for the product, and have various lengths, widths, and thicknesses. In the refining process, steel plates are subjected to various treatments such as inspection, care, heat treatment, and painting, and the steel plates are also temporarily stored in order to deal with differences in the processing pitch of each process. . Therefore, compared to the rolling process and shearing process, the single shipping table in the finishing process has various functions that take into account operations such as placing the steel plate directly from the crane onto the single shipping table, or hanging the copper plate directly from the conveying table by the crane. It is characteristic that it is even more complicated in that it has to have the following.

When placing a steel plate from a crane to transfer table 2, in automatic table transfer, one table is treated as one steel, and 1) 1j packing is the 1iii requirement, or the steel plate is placed from the crane to IM transfer table 2. In some cases, several steel plates may be placed on the same table depending on the length of the steel plates. In this case, the above number of steel plates must be separated into one steel plate per table while the table is being transported. This separation is automatic. For transport tables that cannot be carried out on a regular basis, the only option is to impose a condition on the crane that only one steel plate can be placed on the same table.However, the length of the steel plate must be at least 3.5 m, for example.
There is a wide range of heights, from 18m to 18m, and the crane's ability to lift this is based on the maximum length of the steel plate, so it is possible to lift several short and small steel plates at the same time, but it is not possible to limit this to just one. is uneconomical.

Next, the case of suspending steel plates from the +a feeder table with a crane will be explained. The steel plates transported by table automatic transport are one steel plate per table, and it is difficult to suspend several steel plates at once. In order for a crane to lift several steel plates at once, it is necessary to line up the steel plates directly below the crane at appropriate intervals. In other words, this lifting crane has a large number of electromagnets (for example, 15) suspended from a lifting beam at uneven intervals in order to match the length of various steel plates, and when lifting the steel plate, both ends and the middle are attracted to the electromagnets. It must be placed in a predetermined positional relationship with respect to the electromagnet group. In order to place several steel plates, which are delivered on a one-table, one-plate basis, in an appropriate position relative to the crane's electromagnet group, the crane's transport table must be divided into sections according to the length of the steel plates so that they can be driven individually. It is necessary to take measures such as installing a steel plate detector at the desired stopping position of each steel plate, selecting the output of the detector according to the length of the steel plate, and stopping each steel plate at the appropriate position. ,It is not easy.

These conventional TNN tables have drawbacks such as reduced crane work efficiency, or the need to install multiple steel plate detectors and perform complicated processing to improve efficiency. .

OBJECTS OF THE INVENTION It is an object of the present invention to provide a conveying table control device which eliminates the above drawbacks and can set the respective steel plates on the conveying table at predetermined intervals with simple control.

Structure of the Invention The present invention is a control device for a conveyance table disposed in a steel plate finishing process, which includes a steel plate detector attached to the boundary between two adjacent conveyance tables to detect the edge of the steel plate, and the conveyance table on the downstream side. It has a means to measure the steel plate conveyance length by
comprising a transport control device that generates start and stop command signals to the transport table on the upstream side and the transport table on the downstream side,
When the tail end of the steel plate is detected by the detector, the measurement means starts measuring the steel plate conveyance length on the downstream side conveyance table, and when it reaches a predetermined value for the steel plate, the downstream side 1
The present invention is characterized in that when the 11i transport table is stopped and the detector detects the tip of the extinguishing board, the downstream transport table is started.This will be explained next with reference to embodiments.

Embodiment of the Invention FIG. 1 shows an embodiment of the present invention, where 10 and 20 are two adjacent conveyance tables, and since the conveyance direction of the steel plate 30 is in the direction of arrow F, 10 is the upstream side and 20 is the downstream side. be. Each IB feed roller 11 of the table 10 is connected by a connecting mechanism 12 and driven by a common motor 13. A speed generator 14 is connected to the motor 13, and the control device 15 controls the motor 1 using the speed command S1 from the automatic table conveyance control device 35 and the actual speed signal S2 from the speed generator 1-4.
3. Therefore, the transport speed of the transport table 10 is automatically controlled.

The same applies to the conveying table 20, and each roller 21 is connected to a connecting mechanism 22.
The speed control device 26 automatically controls the speed of the motor 23 according to the actual speed signal S4 from the speed generator 24 and the speed command S3 from the conveyance control device 35. A pulse generator 25 is also connected to the motor 23, and the output pulse S5 is inputted to a general feed control device 35. Steel plate edge detectors 31 to 33 are provided at the boundary between these l forwarding tables 10 and 20. 31 is the emitter, 32.33 is the receiver, juice! Fj
, 30 to detect the presence or absence of the steel plate and, furthermore, the edge thereof.

To explain the operation, the steel plate 30 is transported by the transport table in the direction of arrow F, and when the tip is detected by the detector 33, the transport control device 35 starts counting the output pulses of the pulse generator 25, and the detector 33 When detects the tail end of the steel plate 30, the counting is stopped, thus measuring the length of the steel plate 30. Assuming that the transport table 20 extends to the above-mentioned lifting crane, the interval between each steel plate to be transported needs to be a predetermined value depending on the length of each steel plate. Therefore, after measuring the length of the steel plate 30, the 1ull feed control device 35 indexes a table of steel plate length vs. spacing prepared in advance to determine the spacing for the steel plate length, and after detecting the tail end of the steel plate, the conveyance table 2o determines the spacing. After the steel plate has been conveyed, the speed command S3 is set to O. That is, 1
M. Stop the feed table 20. When the next steel plate (not shown, but 30A) is conveyed and the detector 33 detects its tip, the IM feed control device 35 activates the conveyance table 20 and simultaneously starts measuring the length of the steel plate 30A. do. The same applies below, and thus the transport table 20
Each steel plate is placed on top at a predetermined interval ζ corresponding to its length and transported to a lifting crane.

Figure 2 shows an overview of the lifting crane. Numeral 36 is an electromagnet, and a plurality of electromagnets are hung at uneven intervals on the elevating beam 37, and the steel plate 30.30A is attracted to this electromagnet, and the heel 37
It is lifted and suspended by lifting and lowering. The steel plate is positioned with respect to the group of electromagnets in the heel 37 so that it is attracted to the electromagnets near both ends, and the electromagnets that do not face the steel plate are not excited, etc., and are selected to be turned on or off.

FIG. 3 is an explanatory diagram showing the operating state of each part, (8) shows the operation of the steel plate detector 33, (b) shows the speed command Sl for the upstream progressive table 10, and (C1 shows the downstream transport The speed command S3 for the table 20 is not shown, (d)
indicates the count value of a counter that counts pulses S5. As mentioned above, the counter starts counting 81 when the detector 3-3 detects the tip of the steel plate (in the figure, this is not detected), and at this time, the downstream conveyance table 20 is also started (S3 starts up). . When detecting +a33 or detecting the tail end of the steel plate 111 (this is not shown in the figure), the counter stops counting d1, and the counted value at that time indicates the length of the steel IIy. At this time, upstream side 1! Ii feeding table 10 stops, restarts counting after being reset, and when the value β corresponding to the desired distance from the fire extinguishing plate is reached, the upstream Ta feeding table 10 is activated.
The downstream conveyance table 20 is stopped.

Although the upstream conveyance table 10 is stopped above when the tail end of the steel plate 30 is detected, the conveyance may be continued without stopping. If the distance between the steel plates is sufficient, the tip of the next phase plate will still be detected by the detector 3 after measuring the distance 1, and when the measurement of the distance ρ is completed, the downstream conveyance table 20 will be stopped. The table 20 may be activated when the tip of the next phase plate is detected. However, in this method, when the steel plates are conveyed close together, they pass under the fire extinguishing plate 30A or the detector 33 during the measurement of the distance ρ, and then
In this case, the desired interval cannot be secured. However, in this case, it is preferable to provide another detector 32 and do the following. That is, the tip of the steel plate 30 is the detector 33.
When detected, the length measurement of the steel plate is started and the downstream conveyance table 20 is started, which is the same as above, but when the tail end of the steel plate is detected, the distance ρ is measured, Table 0 is not stopped. When the steel plates are close together and the fire extinguishing plate 30A is to be moved during the measurement of the interval β, the tip thereof is detected by the detector 32 and the upstream conveyance table 10 is stopped. Does this detector 32 also respond to the steel plate 30?
To overcome this, the detection signal can be ignored, or the detector 32 can be activated when the detector 33 detects the tail end of the steel plate. In this way, when the detector 32 detects the tip of the fire extinguishing board 30Δ, as described above, the second-stream conveyance chifur 10 stops, and the desired interval is reached at the point where the downstream conveyance chifur 10 is completed. Once downstream IG
The feeding table is stopped 1-S-U, the downstream table is started-1, and when the tip of the fire extinguishing board 30A is detected by the detector 33, the downstream) ship speed table is started and steel plate length measurement is started. In this way, you can secure the desired spacing between each steel plate,
In addition, by operating the general feed table as much as possible, the feed efficiency can be increased by 111.

1. Even when the general feed table is stopped, more specifically, its drive morph is stopped, the table does not stop immediately but coasts a little. During this coasting, in the latter case, if the fire extinguishing board enters the detection position of the detector 33, it will not be possible to set the interval, so it is recommended that the interval between the detectors 32 and 33 be greater than the coasting distance of the steel plate. .

The length, width, and other information of each steel plate conveyed on the conveyance table are tracked by a process control computer, so there is no need to measure them if the length of the steel plate is obtained from the computer. In this case, the counter of the conveyance control device 35 has an interval ρ
Measurements will be made.

As explained above, according to the present invention, one or two steel plate detectors are installed, and by controlling the conveying table, each steel plate on the conveying sheet is given a desired spacing. It can be extremely beneficial. The spacing between each steel plate can be changed from regular intervals to specified uneven intervals, uneven intervals to equal intervals, close to each other to a distance, You can freely move objects closer to you.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of a lifting crane, and FIG. 3 is an explanatory diagram of the operation. In the drawing, 10.20 is the upstream side, downstream side number transfer table, 3
2.33 is a steel plate detector, and 35 is a conveyance control device. Applicant: Nippon Steel Corporation? l- Representative Patent Attorney Minoru Aoyagi Figure 1 Figure 2; ! 7 30△ 3o ri

Claims (2)

[Claims] (1) In a control device for a conveyance table installed in the steel plate top preparation process, a steel plate detector is installed at the boundary between two adjacent conveyance tables and detects the edge of the steel plate, and a steel plate detector located on the downstream side of the conveyance table A conveyance control device having means for measuring the general feed length of the steel plate and generating start and stop command signals to the conveyance table on the upstream side and the conveyance table on the downstream side, and a tail end of the steel plate is detected by the detector. When the measurement means starts measuring the steel plate conveyance length of the downstream side conveyance table, and when it reaches a predetermined value for the steel plate, the downstream side 1
A control device for a general feed table whose motive is to stop the general feed table and start the downstream (1111INN child table) when the detector detects the tip of the fire extinguishing board. (2) Steel plate finishing] - In the control device for the transfer table installed in the process, a pair of control devices are installed at the rear end of the upstream side of two adjacent transfer tables and the front end of the downstream side to detect the steel plate edge. It has a steel plate detector and means for measuring the length of steel plate conveyance by the downstream conveyance table, and includes a general feed control device that generates start and stop command signals to the upstream conveyance table and the downstream conveyance table, When the tail end is detected by the detector on the downstream side, the measurement means starts measuring the steel plate conveyance length of the downstream conveyance table, and when the length reaches a predetermined value for the steel plate, the downstream conveyance table is stopped; During this measurement, when the tip of the extinguishing plate is detected by the detector on the upstream side, the upstream conveying table is stopped, and after the measurement is completed, the tip of the extinguishing plate being conveyed by the upstream conveying table is detected by the detector on the downstream side. A control device for a single general transport table, characterized in that the downstream transport table is activated when detected by a detector.