JPH0638562Y2 - Steel plate meandering device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a meandering straightening device for a steel plate, which is installed in a running line of a steel plate and straightens the meandering of the running steel plate.

[Prior Art] Conventionally, when a steel plate meanders in a traveling line, the meandering is manually corrected each time. For example, the meandering of the steel plate is corrected by temporarily loosening the mounting bolts of the support roll that supports the steel plate and changing the mounting angle of the support roll. In addition, at that time, the traveling line may be temporarily stopped if necessary.

[Problems to be solved by the invention] However, as described above, the work of manually correcting the meandering of the steel plate is a troublesome work every time the steel plate meanders, and unless the presence or absence of meandering is constantly monitored. It was a heavy burden. Moreover, when the running line is stopped to correct the meandering of the steel sheet, there is a problem that the quality of the steel sheet is adversely affected due to the stop time of the running line.

This invention makes it a subject to solve such a problem, and an object of this invention is to provide the steel plate meandering straightening device which can automatically correct the meandering of a steel plate.

[Means for Solving the Problems] A meandering straightening device for a steel plate according to the present invention is a meandering straightening device for a steel plate, which is installed in a running line of a steel plate to correct the meandering of a running steel plate. A meandering sensor that detects the meandering direction and the amount of meandering of the steel sheet, and is arranged below the traveling line of the steel sheet so as to extend in a direction orthogonal to the traveling direction of the steel sheet, and the extending direction thereof. A straightening roll that is rotatable about the axis of the straight line and that can swing in the same plane as the lower surface of the steel plate around the midpoint of the axis; and swings the straightening roll based on the detection amount of the meandering sensor. And a straightening roll,
It is characterized in that it is arranged so that it can be retracted from the running line of steel plates.

[Operation] The steel sheet meandering correction device of the present invention detects the meandering direction and the amount of meandering of the steel sheet, and automatically swings the straightening roll by the amount of the meandering of the steel sheet based on the detection result. As a result, the straightening roll direction with respect to the running line of the steel sheet is changed to automatically correct the meandering of the steel sheet. Moreover, since it is possible to retract the straightening roll from the traveling line of the steel plate,
The presence of the straightening roll does not interfere with other work in the running line of the steel sheet.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 are views for explaining a first embodiment of the present invention.

In FIG. 1, L is a traveling line of the steel plate W, and a plurality of support rolls (not shown) lined up at a predetermined interval in the left-right direction in FIG. The steel plate W is made to run continuously toward. In the traveling line L, a straightening roll 1 for correcting the meandering located below the steel plate W is provided. The straightening roll 1 has both ends thereof held by a holder 2 having a U-shaped cross section, and is rotatable about an axis O1 in the horizontal direction. An upper end of a shaft 3 extending downward is fixed to an intermediate portion of the holder 2, and a lower end of the shaft 3 is rotatably attached to a tip of a horizontal arm 4. Thus, the straightening roll 1 can swing in the horizontal plane about the axis O2 of the shaft 3. The horizontal arm 4 is fixed at its base end to the side of the traveling line L to a swivel pole 5 which is vertically installed so as to be swivelable within a range of 90 ° about an axis O4 in the vertical direction. It is possible to evacuate from the traveling line L. The horizontal arm 4 usually extends in a direction orthogonal to the traveling line L.

Two upper and lower horizontal arms 6 that are horizontal and extend in a direction orthogonal to the horizontal arm 4 (downward in FIG. 3) are fixed to the swivel pole 5. A cylinder 8 is laterally mounted between the upper and lower horizontal arms 6 by a vertical shaft 7, and is rotatable about an axis O3 of the shaft 7. The tip of the piston rod 8a of the cylinder 8 is
Pin 9 is pin-coupled to one end of swing arm 10,
The other end of the swing arm 10 is attached to the lower end of the shaft 3 of the holder 2.

With such a configuration, the straightening roll 1 can move the traveling line L
On the lower side of the steel plate W inside, it is rotatable about a horizontal axis O1 and swingable about a vertical axis O2. When the cylinder 8 expands and contracts, the straightening roll 1 together with the holder 2 swings about the axis O2. Moreover, the straightening roll 1 can be retracted from the traveling line L by swinging the turning pole 5 within a range of 90 ° about the axis O4 (see FIG. 3).

In FIG. 1, the relationship between the straightening roll 1 and the cylinder 8 is shown in a simplified manner. However, the contents are the same, and the straightening roll 1 swings about the axis O2 by the expansion and contraction operation of the cylinder 8. As shown by the solid line in FIG. 1, the straightening roll 1 has a neutral position when its axis O1 is orthogonal to the traveling line L, and a traveling direction of the steel plate W when it is swung clockwise in FIG. Is directed upward in the figure, and when the steel plate W is swung counterclockwise in the figure, the traveling direction of the steel plate W is directed downward in the figure.

Further, a meandering sensor 11 for detecting the meandering direction and the amount of meandering of the steel plate W is provided in the traveling line L. In the case of the present example, the meandering sensor 11 is composed of a projector 11a and a light receiver 11b which are positioned above and below the steel plate W in the traveling line L, and in the optical path between the light projector 11a and the light receiver 11b. The left edge WL in the traveling direction of the steel plate W is located. Therefore, the light receiving range in the light receiver 11b, that is, the amount of light received changes depending on the position of the left edge WL, that is, the meandering position of the steel plate W. The light receiver 11b outputs a voltage according to the amount of received light as a detection signal S.

The detection signal of the light receiver 11b is amplified by the amplifier 13 of the control unit 12. The width of the amplification is 0-12V, and the steel plate W
The detection signal S is 6V when the left side edge WL is in the normal traveling position, that is, the neutral position. Then, when the steel plate W meanders downward in FIG. 1 from the neutral position and the voltage value of the detection signal S becomes small, the voltage value is amplified to 6 to 0 V accordingly. On the other hand, when the steel plate W meanders upward in FIG. 1 from the neutral position and the voltage value of the detection signal S increases, the voltage is amplified to 6 to 12 V accordingly. Therefore, in the following, the output voltage (0 to 12V) of the amplifier 13 is referred to as the detection voltage V.

The detection voltage V is input to the V / A converter 14, converted into a direct current (hereinafter referred to as “detection current A”) corresponding to the voltage value, and then input to the electropneumatic positioner (I / P) 15. . The electropneumatic positioner 15 controls the expansion / contraction operation position of the cylinder 8 according to the value of the detected current A. Specifically, the supply passage of the pressurized medium to the cylinder 8 is controlled to be opened and closed, the cylinder 8 is expanded and contracted to the target position corresponding to the detected current A, and the straightening roll 1 is swung about the axis O2.

When the detected current A has a value corresponding to (6−α ≦ V ≦ 6 + α) V of the detected voltage V, the electropneumatic positioner 15
The cylinder 8 is set to the neutral position. Here, α is a dead zone for stabilizing the straightening roll 1 at the neutral position. When the detected current A has a value corresponding to {V <(6-α)} V of the detected voltage V, the straightening roll 1 is swung clockwise about the axis O1 in FIG. On the other hand, the detection current A
Is a value corresponding to {V> (6 + α)} V of the detected voltage V, the straightening roll 1 is swung counterclockwise in FIG. 1 about the axis O1.

Further, the detection voltage V output from the amplifier 13 is input to the alarm determiner 16. The determiner 16 outputs the first alarm signal P1 when the detection voltage V is (V <3) V, and outputs the second alarm signal P2 when the detection voltage V is (V> 9) V. Output. These alarm signals P1 and P2 are input to the timer 17. The timer 17 turns on the alarm lamp 18 and the first determination lamp 19 when the first alarm signal P1 is continuously input for a predetermined time or longer. When the second alarm signal P2 is continuously input for a predetermined time or longer, the alarm lamp 18 and the second alarm signal P2
The discrimination lamp 20 is turned on.

Further, a pressure switch 21 for detecting that the medium pressure has dropped to a predetermined value or less is attached in the supply path of the pressurized medium that is the power source of the cylinder 8. The detection signal of the pressure switch 21 is input to the alarm 22. The alarm 22 is adapted to issue a medium pressure down alarm by inputting the detection signal.

Next, the operation of the controller 12 will be described with reference to the flowchart of FIG.

First, the detection voltage V corresponding to the detection signal S of the light receiver 11b is input (step S1). The electropneumatic positioner 15 compares and determines the value of the detected current A corresponding to the detected voltage V (steps S2 and S3), and the detected voltage V becomes (6-α ≦ V ≦ 6 + α).
When it corresponds to V, the cylinder 8 is not operated and the process returns to step S1. Thereby, the straightening roll 1 is maintained in the neutral position.

When the detected current A corresponds to {V <(6-α)} V of the detected voltage V, that is, when the steel plate W meanders toward the left edge WL, the process proceeds from step S3 to step S4. Step S4
Then, the cylinder 8 is operated to swing the straightening roll 1 in the clockwise direction in FIG. 1, that is, in the direction in which the traveling direction of the steel plate W is directed toward the opposite right edge WR (WL side straightening). Therefore, the meandering of the steel plate W near the left edge WL is corrected.

On the other hand, the detected current A is {V <(6-α)} V of the detected voltage V.
When the detected voltage V does not correspond to {V> (6+
When the steel plate W meanders toward the right edge WR corresponding to α)} V, the process proceeds from step S3 to step S5. In step S5, the cylinder 8 is operated to swing the straightening roll 1 in the counterclockwise direction in FIG. 1, that is, in the direction in which the traveling direction of the steel plate W is directed toward the opposite left edge WL (correction on the WR side). . Therefore, the meandering of the steel plate W near the right edge WR is corrected.

The process proceeds from step S4 to step S6. Here, the alarm determiner 16 compares and determines the detected voltage V, and when it exceeds 3V, the process returns to step S1, and when it is 3V or less, the first alarm signal P1 is output and step S7. Proceed to. In step S7, the timer 17 turns on the alarm lamp 18 and the first discrimination lamp 19 (alarm) on condition that the first alarm signal P1 is continuously output for a predetermined time or longer. From this alarm, it can be known that the steel sheet W has continuously meandered toward the left edge WL.

On the other hand, the process proceeds from step S5 to step S8. here,
The alarm determiner 16 compares and determines the detection voltage V, which is 9V.
When it is less than the above, the process returns to step S1, and when it is 9 V or more, the second alarm signal P2 is output and the process proceeds to step S9.
In step S9, the timer 17 turns on the alarm lamp 18 and the second determination lamp 19 (alarm) on condition that the second alarm signal P2 is continuously output for a predetermined time or longer. From this alarm, it can be known that the steel plate W continuously meandered toward the right edge WR.

By the way, as a modification of the present embodiment, the value of the detection voltage V is in the range of {V <(6-α)} V, in the range of {(6-α ≦ V ≦ 6 + α) V}, or in the range of {V> (6 + α). )} Range, a timer may be started and a predetermined control in each range may be performed after a predetermined time from the time when the range is moved. In this case, the delay of the meandering correction by the correction roll 1 can be eliminated.

Moreover, when the turning pole 5 is in the turning limit position to the left in FIG. 3, the straightening roll 1 is located in the traveling line L, while the turning pole 5 is in the turning limit position to the right in FIG. When the vehicle rolls up to (1), the straightening roll 1 retreats from the traveling line L.

Therefore, the straightening roll 1 can be evacuated according to the passing condition of the steel plate W in the traveling line L and the traveling of the traveling body such as a loop car in the traveling line L.

5 and 6 are views for explaining another embodiment of the present invention.

In this embodiment, two sets of the straightening rolls 1 in the embodiment of FIGS. 1 to 3 described above are symmetrically arranged on both sides of the steel plate W. Therefore, as represented by the solid line in FIG. 6, when the two sets of turning poles 5 are turned toward the inside of the steel plate W, the two sets of the straightening rolls 1 are located in the traveling line L. On the other hand, as shown by the two-dot chain line in the figure,
When the two sets of turning poles 5 are turned toward the outside of the steel plate W, the two sets of the straightening rolls 1 retreat from the traveling line L.

Therefore, also in the case of the present embodiment, the traveling line L of the steel plate W is
The straightening roll 1 can be retracted in accordance with the passing conditions of the inside and the traveling of a traveling body such as a loop car in the traveling line L.

[Effect of the Invention] As described above, the steel plate meandering correction device of the present invention detects the meandering direction and the amount of meandering of the steel plate, and based on the detection result, automatically corrects the straightening rolls by the amount corresponding to the meandering of the steel plate. Since the configuration is such that the steel sheet is swung to change the direction of the straightening roll with respect to the running line of the steel sheet, the meandering of the steel sheet can be automatically straightened.

Therefore, there is no trouble as in the case of the conventional manual correction, and the traveling line of the steel sheet is not stopped.

Moreover, since the straightening roll can be retracted from the running line of the steel sheet in accordance with the threading situation in the running line of the steel sheet or the running of the traveling body in the running line of the steel sheet, the presence of the straightening roll It does not interfere with other work on the travel line.

[Brief description of drawings]

1 to 4 are views for explaining an embodiment of the present invention, and FIG. 1 is a block diagram of the entire apparatus,
FIG. 2 is a front view of the straightening roll and its peripheral portion, FIG. 3 is a view on arrow III of FIG. 2, and FIG. 4 is a flowchart for explaining the operation. FIGS. 5 and 6 are views for explaining another embodiment of the present invention, FIG. 5 is a block diagram of the whole apparatus, and FIG. 6 is a plan view of a main part. 1 ... Straightening roll, 8 ... Cylinder, 11 ... Meandering sensor, 12 ... Control part, L ... Running line, W ... Steel plate, WL ... Left edge, WR ... Right edge.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 62-31650 (JP, A) JP 62-2111260 (JP, A) JP 2-295607 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A meandering correction device for a steel plate, which is installed in a running line of a steel plate to correct meandering of a running steel plate, and is installed in a running line of a steel plate to detect a meandering direction and a meandering amount of the steel plate. The meandering sensor and the lower side of the running line of the steel plate are arranged so as to extend in a direction orthogonal to the running direction of the steel plate, and are rotatable about the axis of the running direction and the midpoint of the axis. A straightening roll swingable in the same plane as the lower surface of the steel plate, a drive unit for swinging the straightening roll, and a swinging unit for the straightening roll based on a detection amount of the meandering sensor. A meandering straightening device for a steel sheet, wherein the straightening roll is provided so as to be retractable from a traveling line of the steel sheet.