JP2014113631A - Device for preventing meandering of steel plate of vertical type looper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel plate meandering prevention device of a vertical type looper that can prevent meandering of a steel plate with simple equipment.SOLUTION: A steel plate meandering prevention device of a vertical type looper includes: a jack mechanism provided at least at two corner parts of a looper carriage, respectively, and connected with a chain or a wire rope for pulling the looper carriage through attachment fittings; an inclinometer for detecting an inclination amount of the looper carriage; a level indicator for detecting a height of the looper carriage: and means for receiving a detected signal from the inclinometer and the level indicator and finding the inclination amount of the looper carriage in which a meandering rate of the steel plate becomes 0, and for instructing the found inclination amount of the looper carriage to the jack mechanism to thereby control the inclination amount of the looper carriage by the jack mechanism.

Description

  The present invention relates to a steel plate meandering prevention device for a saddle type looper used in a continuous annealing facility or the like of an ironworks.

  For example, in a continuous production line for hot-dip galvanized steel sheets, a vertical looper is provided as a countermeasure against fluctuations in the steel sheet conveyance speed and as a countermeasure against steel sheet connection, and a predetermined amount of steel sheets is stored in the looper. Yes.

  As shown in FIG. 5, a plurality of pairs of upper and lower rolls (upper looper roll 33, lower looper roll 34) are disposed on the vertical looper, and the upper and lower rolls are alternately wound by the steel plates 30. It progresses while being hung. The upper looper roll 33 is provided on the looper carriage 32 at a predetermined interval and is suspended horizontally along with the looper carriage 32. The looper carriage 32 is connected to a drive sprocket or drum 38 via four chain or wire ropes 36 at four corners via a sprocket or sheave 35 and is required by a carriage drive mechanism 37. The upper looper roll 33 is moved up and down together with the looper carriage 32 by winding or unloading the chain or wire rope 36 in accordance with the above.

  In the conventional vertical looper, the looper carriage is inclined because the amount of elongation of each chain or wire during operation is different, or the shape of the steel plate is not uniform. -In some cases, meandering of the steel plate occurs, and operation may become impossible. For this reason, as countermeasures, measures such as limiting the operating conditions in a range where there is little meandering, for example, the looper stroke (lifting range of the looper carriage) have been taken. However, the facility utilization rate was reduced. In addition, there is a measure to install a meandering correction roll in the looper, but due to installation space limitations, the number of installations is limited and the correction capability is limited.

  As a technique for preventing such meandering of the steel plate in the saddle type looper, there is an apparatus disclosed in Patent Document 1. The steel plate meandering prevention device for the vertical looper based on this technology detects the meandering amount of the steel plate on at least one of the entrance side and the exit side of the looper, and the length of the chain or wire rope that pulls the looper carriage based on the detection result. Are adjusted individually, and the looper carriage is tilted to prevent meandering of the steel plate in the looper.

JP-A-8-267139

  However, the saddle-type looper steel plate meandering prevention device disclosed in Patent Document 1 has a problem that the facilities are complicated. That is, the chain or wire rope has elongation, and the amount of elongation is affected by the length and load. Therefore, in order to prevent the meandering by tilting the looper carriage based on the detection result of the meandering amount of the steel plate, The adjustment length of the chain or wire rope must be determined in consideration of the total length of the chain or wire rope (carriage height) and the amount of elongation due to the load (tension) at that time. There is a problem that an apparatus is required and the facilities are complicated and expensive.

  An object of the present invention is to solve the above-mentioned problems and to provide a steel plate meandering prevention device for a saddle type looper capable of preventing the meandering of a steel plate with simple equipment.

Means of the present invention for solving the above-mentioned problems are as follows.
[1] A jack mechanism provided at each of at least two corners of the looper carriage and connected to a chain or wire rope for pulling the looper carriage via a mounting bracket, and an inclinometer for detecting the amount of inclination of the looper carriage And a level meter for detecting the height of the looper carriage, a detection signal from the inclinometer and the level meter, and an inclination amount of the looper carriage at which the meandering amount of the steel plate is zero, and the obtained looper An apparatus for preventing meandering of a steel plate of a saddle type looper, comprising: means for instructing the amount of inclination of the carriage to the jack mechanism and controlling the amount of inclination of the looper carriage by the jack mechanism.

  In the steel plate meandering prevention device for the vertical looper according to the present invention, the inclination amount of the looper carriage is detected by an inclinometer, the height of the looper carriage is detected by a level meter, and the detection signal from the inclinometer and the level meter are detected. Based on the detection signal, the amount of inclination of the looper carriage that causes the meandering amount to be 0 is obtained, and an elevation command is issued to the jack mechanism, and in response to this command, the amount of inclination of the looper carriage by the jack mechanism is controlled. Control in consideration of the total length of the rope (height of the looper carriage) and the amount of elongation due to the load (tension) is not required, and the meandering of the steel plate in the looper can be prevented with simple equipment.

It is a perspective view which shows the steel plate meandering prevention apparatus of the saddle type looper of a wire rope system of this invention. It is a figure which shows the relationship between the amount of meandering, and the inclination amount of a looper carriage. It is sectional drawing which shows the meandering state of the steel plate in the state where there is no inclination in a looper carriage. It is sectional drawing which shows the state which corrected the meandering of the steel plate with the steel plate meandering prevention apparatus of the saddle type looper of this invention. It is a perspective view which shows the steel plate meandering prevention apparatus of the conventional saddle type looper. It is a figure which shows the tolerance | permissible_range of the meandering amount of a looper.

  In the steel plate meandering prevention device for a saddle type looper according to the present invention, an inclination amount of the looper carriage (hereinafter sometimes simply referred to as “looper carriage inclination amount”) is detected by an inclinometer, and the detection signal is used as a control means. Based on the feed, the control means calculates the looper carriage inclination amount at which the meandering amount becomes zero from the relationship between the meandering amount of the steel sheet and the looper carriage inclination amount. At this time, the relationship between the amount of meandering and the amount of inclination of the looper carriage differs depending on the height of the looper carriage (hereinafter, sometimes simply referred to as “looper carriage height”). A looper carriage inclination amount at which the meandering amount becomes zero is calculated in accordance with a detection signal from the level meter. The control means compares the detected looper carriage inclination amount with the looper carriage inclination amount at which the calculated meandering amount becomes 0. If there is a difference, the control mechanism sends an elevation command to the jack mechanism, and the jack mechanism sends a command from the control means. When the signal is received, the drive mechanism of the jack mechanism rotates the horizontal shaft worm, the horizontal shaft worm rotates the worm gear around the vertical axis, and the vertical shaft jack that rotates together with the worm gear moves up and down relative to the mounting bracket, and the looper Correct the carriage tilt amount. When there is no difference between the detected looper carriage tilt amount and the looper carriage tilt amount at which the calculated meandering amount becomes zero, the control means sends a stop command to the jack mechanism, and as a result, the looper carriage tilt amount at which the meander amount becomes zero. It becomes possible to prevent meandering.

  Hereinafter, the present invention will be specifically described. FIG. 1 is a perspective view showing a steel plate meandering prevention device for a wire rope type saddle type looper according to an embodiment of the present invention.

  In FIG. 1, 30 is a steel plate, 32 is a looper carriage, 33 is an upper looper roll, 34 is a lower looper roll, 35 is a sheave, 36 is a wire rope, 37 is a carriage drive mechanism, 38 is a drum, 40 is a mounting bracket, 41 Is a jack mechanism, and 46 is a jack mechanism drive source. 1 is an inclinometer, 2 is a control means (control device), and 3 is a level meter. The inclinometer 1 is not particularly limited as long as it can measure the inclination, but in the present invention, the pendulum is used to calculate the amount of inclination from the servo amount (current output) by applying servo so that the pendulum is at the center of the magnetic sensor. An inclinometer is used. The level meter 3 is not particularly limited as long as it can calculate the carriage height, but in the present invention, the rotation amount is detected by a rotation detector (so-called PLG, encoder) attached to the drum shaft end, and the carriage height is detected. This is to calculate the thickness.

  In this apparatus, a jack mechanism 41 is connected to a wire rope 36 that pulls the looper carriage 32 through two fittings 40 at two corners on one end side in the steel plate width direction of the looper carriage 32.

  Since the relationship between the meandering amount and the looper carriage inclination amount varies depending on the height of the looper carriage, it is obtained in advance in correspondence with the height of the looper carriage from tests in actual equipment and analysis of operating conditions. FIG. 2 shows an entrance looper of a continuous processing equipment for steel plates. A steel plate having a plate thickness of 1.2 mm and a plate width of 1781 mm was passed through the looper carriage without any inclination, and the inclination amount of the looper carriage was changed when meandering occurred. An example is shown in which the relationship between the meandering amount A and the looper carriage inclination amount B is determined in correspondence with the looper carriage height Z. The amount of meandering is measured by the CPC sensor 4 that detects the position in the width direction of the steel sheet. The looper carriage height Z is a ratio (%) to the maximum height of the facility specification. The meandering amount is the amount of meandering in the right direction of the X axis in FIG. 1, and the looper carriage inclination amount is the rising amount of the right bearing with respect to the left bearing of the upper looper roll 33.

  Since the looper carriage 32 normally moves up and down in a horizontal state, the guide roll 50 and the guide rail 51 are provided with a certain amount of gap C (see FIG. 3).

  In the present invention, the looper carriage inclination amount at which the meandering amount becomes zero is controlled based on the detection signal (meandering amount) from the inclinometer 1 and the detection signal from the level meter 3, and therefore, as shown in FIG. The amount of inclination of 32 is adjusted.

  From FIG. 2, for example, when Z = 70%, the meandering of about 125 mm can be lowered to about 35 mm by moving the right side bearing of the upper looper roll about 12 mm upward, and further about 4. When moving 5 mm (16.5 mm in total), the meandering can be reduced to zero. When Z = 30%, the meandering of about 90 mm can be achieved by moving the right bearing of the upper looper roll about 4 mm upward. It can be seen that the meandering can be reduced to zero when it can be lowered to about 30 mm and further moved upward by about 2 mm (6 mm in total).

  The control means 2 stores the relationship between the meandering amount A and the looper carriage inclination amount B in correspondence with various looper carriage heights Z for each size. In addition, an allowable range of the meandering amount is input and stored.

  Usually, in the looper, a rollout detection sensor is installed to prevent the steel sheet from rolling out. The allowable range of the meandering amount of the looper is determined by the position of the rollout detection sensor provided for preventing rollout. For example, when the roll width W = 2200 mm, the plate width b = 1880 mm, and the sensor position (distance from the roll end) x = 60 mm, the allowable range is set to (W−b) / 2−x = 100 mm (FIG. 6).

  In this apparatus, the inclination amount of the looper carriage 32 is detected by the inclinometer 1 and a detection signal is sent to the control means 2. Based on this, the control means 2 determines the amount of meander from the relationship between the meandering amount and the inclination amount of the looper carriage 32. An inclination amount of the looper carriage 32 in which becomes 0 is calculated. At this time, since the relationship between the meandering amount and the looper carriage inclination amount 32 differs depending on the height of the looper carriage 32, the height of the looper carriage 32 is detected by the level meter 3, and according to the detection signal from the level meter. The inclination amount of the looper carriage 32 in which the meandering amount becomes 0 is calculated in advance in correspondence with the height of the looper carriage 32 from the test in the actual equipment and the analysis of the operation conditions.

  The control means 2 compares the detected amount of inclination of the looper carriage 32 with the amount of inclination of the looper carriage 32 where the calculated meandering amount is 0. If there is a difference, the control means 2 sends an elevation command to the jack mechanism 41, and the jack mechanism When 41 receives a command signal from the control means, the jack mechanism drive source 46 rotates the horizontal axis worm, the horizontal axis worm rotates the worm gear around the vertical axis, and the vertical axis jack that rotates together with the worm gear is a mounting bracket. Ascending and descending with respect to 40, the amount of inclination of the looper carriage 32 is corrected. When there is no difference between the detected tilt amount of the looper carriage 32 and the tilt amount of the looper carriage 32 where the calculated meandering amount becomes zero, the control means 2 sends a stop command to the jack mechanism 41. As a result, the meander amount is zero. Thus, the amount of inclination of the looper carriage 32 is set to prevent meandering. In addition, by calculating in advance corresponding to the height of the looper carriage 32 from tests in actual equipment and analysis of operating conditions, the shape of the steel plate itself that originally occurred without the inclination of the looper carriage 32 is caused. It is possible to prevent meandering. Since the looper carriage can be tilted in the width direction of the steel sheet without changing the length of the chain or the wire rope, the equipment can be simplified.

  In the above-described embodiment, the wire rope type saddle type looper steel plate meandering prevention device has been described. However, the present invention is also applicable to a chain type saddle type looper. In the chain system, a sprocket is used instead of the sheave, and a drive sprocket is used instead of the drum.

  In the vertical looper described in the present embodiment, when the height of the looper carriage is not inclined (FIG. 3) and the carriage height Z is 70%, a steel plate with a non-uniform shape at the plate edge is confirmed by a CPC sensor. The meandering amount A = 125 mm was generated. In the prior art, since the amount of meandering could not be reduced, the carriage height Z had to be limited and used so as not to roll out from the upper looper roll 33.

  Therefore, in the apparatus of the present invention, by taking the looper carriage inclination amount B = 16.5 mm, the meandering amount A = 0 mm, and good results were obtained.

DESCRIPTION OF SYMBOLS 1 Inclinometer 2 Control means 3 Level meter 4 CPC sensor 32 Looper carriage 33 Upper looper roll 34 Lower looper roll 35 Sprocket or sheave 36 Chain or wire rope 37 Carriage drive mechanism 38 Drive sprocket or drum 40 Mounting bracket 41 Jack mechanism 46 Jack mechanism Drive source 50 Guide roll 51 Guide rail Z Carriage height A Meander amount B Looper carriage tilt amount C Clearance

Claims (1)

  A jack mechanism provided at each of at least two corners of the looper carriage and connected to a chain or a wire rope for pulling the looper carriage via a mounting bracket; an inclinometer for detecting an inclination amount of the looper carriage; A level meter that detects the height of the looper carriage, and the tilt meter and a detection signal from the level meter, and obtains the tilt amount of the looper carriage where the meandering amount of the steel plate is 0, and the obtained tilt of the looper carriage And a means for controlling the amount of inclination of the looper carriage by the jack mechanism to control the amount of inclination of the looper carriage by the jack mechanism.

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