JPS63224851A - Apparatus for carrying cast slab - Google Patents

Abstract

PURPOSE:To prevent collision of the succeeding cast slab with the preceded cast slab and to shorten the distance between the succeeding cast slab and the preceding by always measuring the interval between the preceded cast slab and the succeeding cast slab, comparing this interval with the calculated stopping distance of the cast slab at the previous stage and finding the suitable stopping position of the succeeding cast slab. CONSTITUTION:A shifting distance calculator 32 for preceding cast slab calculates the shifted distance l1 of the end of the preceding cast slab by a signal S1 and a pulse signal P1, when the end the preceding cast slab is passed through below a photoelectric detector. A shifting distance calculator 33 for succeeding cast slab calculates the advanced distance l2 of the preceding cast slab by a signal S2 and a pulse signal P2 of the photoelectric detector. A shifting distance calculating circuit 34 for succeeding cast slab calculates the distance l3 between the photoelectric detector and the front of the succeeding cast slab and an interval calculating circuit 34 for cast slabs calculates the interval l4 between the preceding cast slab and the succeeding cast slab. A stop judging circuit 36 for succeeding cast slab compares between l4 and an inertia shifting distance signal l5 for cast slab calculates by control circuit controlling a motor driving roll for upstream roll stand. At the time of l4<=l5, the driving motor is stopped and the proceding cast slab is stopped.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a slab conveying device for a continuous casting line.

(Conventional technology) A conventional slab conveying device will be explained using drawings.

As shown in FIG. 3, the slab conveying device 1 includes a roller table 4 for conveying slabs (a leading piece 22 and a following slab 3).
, 5, 6.7, and roller tables 4, 5, 6.
Drive motor 8 for driving 7, 9.10.
11 and motor switches 12, 13, 14, and 15 for starting and stopping these drive motors 8, 9, 10, and 11.
and photoelectric detectors 17.18 and 19.20 as a slab detection device 16 for detecting slabs.

In this way, the slab conveying device 1 configured as described above allows the slab 2 to be
, 3 are being conveyed in the direction of the arrow A.

When the tip of the preceding slab 3 is detected by the photoelectric detector 19, the drive motor 10 is stopped via the motor switch 14, thereby stopping the roller table 6. Thereby, the preceding slab 2 is stopped on the roller table 6-. Further, the tip of the next slab 3 is detected by the photoelectric detector 18, and the tip of the next slab 3 is detected via the motor switch 13.
The motor 9 is stopped, and the roller table 5 is stopped.

Thereby, the next slab 3 stops on the roller table 5.

After that, the drive motor 10 is started, the roller table 6 is operated, and the preceding slab 2 is passed over the roller table 6, and then the drive motor 9 is started again, the roller table 5 is operated, and the next slab is 3 resumes transportation.

[Problem that the invention seeks to solve]

However, in the conventional slab conveying device, the leading slab 2 stops on the roller table 6 after its tip is detected by the photoelectric detector 19, but the leading slab 2 and the succeeding slab 2
If the lengths of the leading slab 2 are different and the leading slab 2 is longer than the succeeding slab 3, the leading slab 2 stops after the tip of the leading slab 2 passes the photoelectric detector 19.

Therefore, the distance between the photoelectric detector 18 and the tail end of the preceding slab 2 is determined by the distance between the photoelectric detector 18 and the tail end of the preceding slab 2 after the tip of the next slab 3 is detected by the photoelectric detector 18 until the next slab 3 stops. 18
The distance between this and the tip of the next slab 3 becomes shorter.

Therefore, it collides with the preceding slab 2. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a slab conveying device that can prevent collisions between preceding slabs and succeeding slabs even when conveying slabs of different lengths.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an interval calculation means for calculating the interval between the preceding slab and the next slab based on the output signal from the detection means; A progress calculation means for calculating the progress of the slab due to inertial force based on an output signal from the detection means, and an output signal from the progress calculation means and an output signal from the interval calculation means to drive the drive. A slab conveying device is provided, which includes a control means for controlling the means.

(Function) The slab conveying device configured as described above has the following functions. That is, in the upstream roller table, the amount of movement due to inertia force of the slab from when a stop signal is sent to the drive means until it actually stops is calculated and set in the control means of the electric motor that drives the roller table. . Next, the interval calculating means calculates the interval between the preceding slab that is stopped and the next slab that is being transported. Then, the calculated interval between the preceding slab and the next slab is compared with the amount of advance due to the inertia force of the next slab, which is calculated by the upstream roller table and set in advance, and the next slab is moved. The electric motor that drives the rollers of the roller table is controlled so that they do not collide with the preceding slab.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the slab conveying device 1 of this embodiment has the following configuration.

That is, the roller tables 4, 5, 6, 7 are connected to the motor switches 12, 13, 14, 15 . ON, OFF
Driven by controlled drive motors 8, 9, 10, 11.

The slab detection device 16 includes photoelectric detectors 17, 18, 19, 2.
0.21 and pulse transmitters 22, 23, 24.25, and passing over the roller tables 4, 5, 6.7.
Detect.

The control circuits 26, 27, 28 control the drive motors 8, 9, 10 via the motor switches 12, 13, 14 based on the output signal from the slab detection device 16. Judgment circuit 2
9, 30° 31 either outputs a control signal from the control circuits 26, 27, 28 to the motor switch 12, 13.14, or directly outputs a stop signal to the motor switch 12, 13.14. Choose one and decide. In the slab conveying device 1 configured in this manner, the slabs 2 and 3 are conveyed in the direction A of the arrow.

When the leading end of the preceding slab 2 is detected by the photoelectric detector 20, the detection signal is sent to the motor switch 14 via the judgment circuit 31 as a stop command. Motor switch 14 stops drive motor 0, thereby stopping roller table 6. Then, the preceding slab 2 is placed on the roller table 6.
stop at the top.

However, if the lengths of the preceding slab 2 and the succeeding slab 3 are different, and the preceding slab 2 is longer than the succeeding slab 3, immediately after the tail end of the preceding slab 2 passes the photoelectric detector 19, , the tip of the preceding slab 2 is detected by the photoelectric detector 20, and the preceding slab 2 is stopped on the roller table 6 by the above-mentioned operation. At this time, it is necessary to stop the following slab 3 in order to prevent it from colliding with the stopped preceding slab 2.

A method for doing so will be described below.

The moving distance of the tail end of the preceding slab 2 from when it is detected by the photoelectric detector 19 until it actually stops is defined as Ql, and the time in between is defined as tl.

Let Q be the distance that the tip of the next slab 3 has traveled during time t□ after being detected by the photoelectric detector 18.

Also, the distance between the photoelectric detector 18 and the photoelectric detector 19 is set to Qo.
shall be. Therefore, based on the distance between the photoelectric detector 19 and the tip of the next slab 3, the following relationship holds: g3=Qo-C2. Therefore, the formula for calculating the distance between the preceding slab 2 and the following slab 3 is as follows.

C4 = Flood □ 10a3 = ρ □ 10Q. -C2 Next, C4 calculated by the above formula is compared with the moving distance Q5 due to the inertial force of the slab from when the stop command is output to the drive motor 9 until the roller table 5 actually stops.

When 124≦aS, the next slab 3 is stopped and y->
When Qs, the next slab 3 is transported as it is, and C4≦C.
5, the control circuit 27 controls the drive motor 9 via the motor switch 13 so as to stop the next slab 3.

Details of the control circuit 27 will be explained below using FIG. 2. Note that each control circuit 26, 28 that controls the roller tables 4, 6 has the same structure and function, so a description thereof will be omitted.

A next slab moving distance calculator 33 that calculates C2 and ρ.

The next slab movement distance calculation circuit 34 that calculates C4 and the slab spacing calculation circuit 35 that calculates C4 compare C4 and C5,
Further, a slab inertia movement distance calculation circuit 37 calculates the movement distance a5 of the slab due to inertia force from when a stop command is issued to the drive motor 9 until the roller table actually stops.
and a next slab stop judgment circuit 36 that stops the next slab 3.
It is made up of.

The preceding slab movement distance calculator 32 inputs a signal S□ which detects that one end of the tail 7 of the preceding slab 2 has passed under the photoelectric detector 19, and then calculates the pulse provided in the drive motor 10. The pulse signal P□ transmitted from the transmitter 24 is counted and converted into distance to calculate Qo.

The next slab movement distance calculator 33 calculates that the tip of the next slab 3 is
Signal S2 detected as passing under the photoelectric detector 18
After inputting , the pulse signal P2 transmitted from the pulse transmitter 23 provided in the drive motor 9 is counted, converted into a distance, and C2 is calculated.

The next slab moving distance calculation circuit 34 has a value Q set in advance in this circuit. By subtracting I22 from , ra is calculated.

The slab spacing calculation circuit 35 adds Q machining and C3, and calculates C4.
Calculate.

Then, the next slab stop judgment circuit 36 compares C4 with the slab inertial movement distance signal ρ5 calculated by the control circuit 26 that controls the electric motor 8 that drives the roll of the upstream roller stand 4. , when C4≦C5, a stop command is sent to the drive motor 9 via the motor switch]3 to stop the immediate motor 9 fL, thereby stopping the roller table 5 and stopping the preceding slab 3. .

Also, when Qo>ns, the next slab 3 is transported as is, and when I14≦Q, the next slab 3 is transported as described above.
to stop. Therefore, the next slab 3 can be packed in advance.

At this time, the slab inertia movement distance calculation circuit 37 counts the pulse signal P2 transmitted from the pulse transmitter 23 provided in the drive motor 9 from the time when the stop command is transmitted to the drive motor 9, and converts it into a distance. Calculate Q.

〔Effect of the invention〕

As described above, according to the present invention, the distance between the preceding slab and the next slab is constantly measured, the interval is compared with the stopping distance of the slab calculated in the previous process, and the distance between the preceding slab and the next slab is compared. We have installed a control circuit to determine the appropriate stopping position of the row slab and to stop it.
Prevents the next slab from colliding with the stopped preceding slab1
1; It can be done and the next slab can be prepacked.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram showing one embodiment of a slab conveying device according to the present invention, Fig. 2 is a detailed circuit diagram of a control circuit applied to Fig. 1, and Fig. 3 is a diagram of a conventional slab conveying device. It is a block diagram of a conveyance device. 1... Slab conveying device 2... Preceding slab 3.
...Next slab 4.5, 6.7...Roller table 8, 9.10, 11...Drive motor 16...Slab detection device 26, 27, 28...Control circuit 3
2...Previous slab movement distance calculator 33...Next line slab movement distance calculator 34...Next line slab movement distance calculator 35...Slab interval calculation circuit 36...Next line Slab stop judgment circuit 37...Circuit for calculating the inertia movement distance of the facing piece Patent attorney Nori Chika Yudo Hirofumi Futamata

Claims (1)

[Claims] a roller table having a conveyor roll that conveys the slab;
A slab conveying device comprising a driving means for driving the conveying roll and a detection means for detecting the presence or absence of the slab,
A progress calculation means calculates the progress of the slab due to inertial force based on the output signal from the detection means, and a progress calculation means calculates the distance between the preceding slab and the following slab based on the output signal from the detection means. A slab conveying device comprising: an interval calculation means for calculating, and a control means for controlling the drive means based on an output signal from the progress calculation means and an output signal from the interval calculation means.