JP2009202217A - Method and device for straightening meandering of belt-like body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide technique for straightening meandering of a belt-like body which includes large capacity for straightening the meandering of the belt-like body and by which the meandering is immediately straightened when the meandering is generated in a continuous passing line for conveying the belt-like body. <P>SOLUTION: In the continuous passing line of the belt-like body for continuously conveying the belt-like body 1 with a conveying roller 2, a displacement imparting means is provided on at least either of the inlet side and the outlet side in the vicinity of the conveying roller 2. The displacement imparting means is composed of electromagnets 3, 4 which are provided on the rear surface near both ends of the belt-like body 1 and electromagnets 5, 6 which are provided on the surface near both ends of the belt-like body. By simultaneously energizing the electromagnets 3 and 6 or the electromagnets 4 and 5, the belt-like body 1 is attracted in the opposite direction. In the above manner, the belt-like body 1 is inclined so as to be shown by a dotted line 1' and the meandering is straightened. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a belt meandering correction method and apparatus, and more particularly to a technique for correcting meandering in a processing line of a long continuous belt running on a transport roll.

  In a process line that conveys a band, for example, a hot dipping line, a deviation in the width direction of the band (meandering) not only impairs the stability of the plate, but also damages the band due to contact with the wall, etc. It may lead to the rupture of the strip. In order to prevent this meandering, it is conventionally known to use a convex crown roll having a bulge at the center of the width so as to have a self-correcting effect of meandering as a transport roll.

  However, when this convex crown roll is used, if the convex crown of the transport roll is increased in order to increase the meandering correction capability, a narrowing flaw called a heat buckle occurs. Therefore, the size of the convex crown cannot be increased so much. For this reason, there existed a problem that the required meander correction ability could not be obtained depending on the operation conditions.

  In order to solve this problem, for example, in Patent Document 1, a meandering correction nozzle that blows gas between the strip and the transport roll is disposed near the entrance side in the traveling direction of the transport roll on which the strip is stretched. Has proposed a technique for correcting the meandering of a steel sheet.

  However, in the technique of the above-mentioned Patent Document 1, a change in the friction coefficient between the two due to a film of gas (air) blown into the gap between the transport roll and the belt-like body, or a gas pressurized in the gap between the transport roll and the belt-like body Since the displacement (movement) in the width direction is controlled by an unstable control element such as a reaction force when the belt escapes in the width direction of the strip, the gas blowing position and amount and the displacement in the width direction of the strip The causal relationship is unclear, and there is concern that the reproducibility of the displacement direction and displacement amount of the belt-like body due to gas blowing is lowered. For this reason, (1) when designing equipment such as a process line for a belt-like body, clear design guidelines such as nozzle position and gas blowing amount cannot be obtained, and (2) useless gas that does not contribute to correction of meandering There are problems such as the possibility of blowing, and (3) the responsiveness (high responsiveness) of meandering correction cannot be expected.

  With respect to this problem, in Patent Document 2, in at least one of the entrance side and the exit side of the transport roll on which the belt-like body is stretched, the traveling belt-like body has a direction intersecting the main surface of the belt-like body. A method of correcting the meandering by applying displacement by contact with a pressing roll, magnet magnetic force, gas injection, etc., and moving the steel sheet in the width direction by the bobbin winding effect is proposed.

  FIG. 4 is a diagram for explaining the correction method in the width direction described in Patent Document 2, and is an example in which an electromagnet is used. 4A is a plan view, FIG. 4B is a side view, and FIG. 4C is a cross-sectional view taken along line AA in FIG.

  In the same figure, a belt-like body 1 is a ferromagnetic steel plate, which is conveyed from the bottom to the top of FIG. On the back surface of the main surface 1 a of the belt-like body 1, electromagnets 3 and 4 as displacement applying means are provided in a state separated from the belt-like body 1. The electromagnets 3 and 4 are provided so as to face the vicinity of both left and right ends of the strip 1.

  Amplifiers 13 and 14 are connected to the electromagnets 3 and 4, respectively, and the amplifiers 13 and 14 are connected to a control device 15 that calculates an operation amount. The current flowing through the amplifiers 13 and 14 is controlled by the control device 15 and the electromagnet 3 or the electromagnet 4 is excited.

  The meandering detection sensor 11 is provided at a position facing the transporting roll 2 and the strip 1 is changed by approximately 90 ° in the traveling direction, and the meandering of the strip 1 is measured.

For example, when the meandering detection sensor 11 detects that the belt-like body 1 has moved to the right side of the drawing in FIG. 4A, the signal is sent to the control device 15. The control device 15 instructs the amplifier 13 to excite only the right electromagnet 3. Then, since the strip 1 is a ferromagnetic body, the right end portion of the strip 1 is displaced in a direction intersecting the main surface 1a as indicated by a dotted line in FIG. When displaced as shown by the dotted line, the band-like body 1 has a longer length on the right side in FIG. 4 (a) in contact with the transport roll 2 than the left side. Move to the left and you can correct the meandering.
JP-A-62-158827 JP-A-2005-240117

  However, the configuration described in Patent Document 2 shown in FIG. 4 has the following problems. FIG. 5 is an enlarged view of a part of FIG. A strip 1 shown by a solid line in this figure shows a transport state in which neither of the electromagnets 3 and 4 is excited. When only the electromagnet 3 is excited from this state, the band 1 does not change from the position of the solid line on the electromagnet 4 side as shown by the virtual line 1 ″, and the electromagnet 3 side is drawn to the electromagnet 3 to the position of the dotted line. However, in actuality, as indicated by the dotted line 1 ′, the belt-like body 1 is also drawn toward the electromagnet 4. Therefore, the belt-like body 1 is in contact with the transport rolls 2 on the left and right sides. There is a problem that the difference in length becomes small and the meandering cannot be sufficiently corrected.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems, and to provide a meandering correction technique for a belt-like body which has a large ability to correct meandering and can quickly correct the meandering.

  In order to achieve the above object, the method of correcting the meandering of the belt-like body of the present invention is a continuous through plate line of the belt-like body that continuously transports the belt-like body by a transport roll, and either one of left and right in the transport direction of the belt-like body And at a position separated from the one side in the left-right direction, the belt-like body is displaced in a direction intersecting the main surface and in opposite directions.

  The means for displacing the belt-like body in a direction intersecting the main surface is a displacement applying means provided on at least one of the entrance side and the exit side in the vicinity of the transport roll on which the belt-like body is stretched. The displacement applying means is provided on both the front and back surfaces of the belt-like body so as to be separated from each other in the left-right direction of the belt-like body. It can be set as the structure which acts simultaneously with the other displacement provision means located in the other surface of a strip | belt-shaped body in the position spaced apart in the left-right direction of the strip | belt-shaped body.

  Three or more displacement imparting means are provided on each of the front and back surfaces of the strip, and the three or more displacement imparting means provided on one side of the strip each cross the main surface of the strip. The displacement amount is gradually changed from one end side to the other end side of the belt-like body, and a plurality of displacement applying means on the surface opposite to the one surface are provided with the displacement The belt-shaped body may be displaced so as to be in pressure contact with the displacement applying means.

  A configuration in which at least a part of the displacement applying means is disposed in the vicinity of both right and left ends in the transport direction of the belt-like body, or the displacement applying means may be an electromagnet, a pressing roll, or a gas nozzle. it can.

  Further, the position in the width direction of the band is detected by a meandering detection sensor, and the position of the band in the width direction with respect to the position in the target width direction is zero. The displacement amount in the intersecting direction may be controlled by the control device.

  The band-shaped meandering correction apparatus of the present invention that solves the above problem is an entrance side in the vicinity of the conveyance roll on which the band-like body is stretched, in a continuous sheet feed line of the band-like body that continuously conveys the band-like body by the conveyance roll. And at least one of the outlet sides of the strip in the direction intersecting the main surface at one of the left and right ends in the transport direction of the strip and the position spaced from the one end in the left-right direction. Displacement imparting means for displacing in the opposite direction is provided on both the front and back surfaces at two or more positions that are separated from each other in the left-right direction in the transport direction of the belt-like body.

  It is good also as a structure in which at least one part of the said displacement provision means was provided in the left-right both ends of the conveyance direction of the said strip | belt-shaped body.

  Further, a meandering detection sensor for detecting a position in the width direction of the band-shaped body, and a main surface of the band-shaped body by the displacement applying unit so that a width direction positional deviation of the band-shaped body with respect to a target width direction position becomes zero. It can be set as the structure further provided with the control apparatus which controls the displacement amount of the direction which cross | intersects.

  According to the present invention described above, for example, by applying a force to the main surface of the belt-like body that is stretched around the transport roll, the displacement in the direction intersecting the main surface (that is, out-of-plane displacement or Give out-of-plane deformation). This deformation is applied in opposite directions to each other at spaced positions in the left-right direction of the belt-like body. As a result, the contact length with the transport roll changes on the left and right sides of the belt-like body, and the belt-like body can be moved in the width direction and the meandering of the belt-like body can be corrected by the bobbin winding effect. In particular, it is possible to ensure the inclination of the belt-shaped body by displacing the belt-shaped body in the direction intersecting with the main surface and in the opposite directions at positions separated from each other in the conveyance direction of the belt-shaped body. Effectively corrects meandering.

  In addition, by measuring the relationship between the objectively measurable value of out-of-plane deformation and the movement of the band in the width direction at that time, the arrangement position of the mechanism that gives out-of-plane deformation to the band to correct meandering, It is possible to give clear guidelines to the device design such as the number of arrangements.

  In addition, since the out-of-plane deformation of the strip can be measured objectively, the minimum displacement of the pressing roll, magnetic force, gas blowing pressure and amount necessary to give the strip the desired amount of out-of-plane deformation. Can be specified accurately, and control resources such as power, electric power, and gas amount necessary for driving the pressure roll and the electromagnet are not wasted.

  Furthermore, even when mechanical out-of-plane deformation is applied to the belt-like body by any means such as contact of the pressing roll, magnetic force, or dynamic pressure by gas blowing, movement in the width direction occurs in real time due to the pincushion effect. Therefore, it is possible to realize the quick response (high responsiveness) of the meandering correction by the movement control in the width direction of the belt-like body.

  As described above, according to the present invention, in the process line for transporting the belt-like body, a narrowing wrinkle or the like is not generated in the belt-like body, and the necessary meander straightening ability can be obtained in a form in which the meander straightening ability can be evaluated. Immediate correction can also be obtained.

  According to the present invention, the belt-shaped body is transported by displacing the belt-shaped body in the direction intersecting the main surface and in the opposite directions at positions separated from each other in the transport direction of the belt-shaped body. The difference in the contact length between the right and left of the roll is increased, and an excellent effect that the meandering can be corrected quickly can be obtained.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

  1A and 1B are diagrams showing an example of the configuration of a meandering correction apparatus that implements a method for correcting meandering of a belt-like body according to an embodiment of the present invention. FIG. 1A is a front view, FIG. 1B is a right side view, c) is a sectional view taken along line BB in FIG.

  The belt-shaped meandering correction apparatus of the present embodiment includes a transport roll 2 on which a traveling strip-shaped body 1 is stretched, and the left and right sides of the main surface 1a of the strip-shaped body 1 on the entry side in the traveling direction of the transport roll 2. Both edge portions are provided with a plurality of electromagnets 3, 4, 5, and 6 as displacement applying means. The electromagnets 3 and 4 are on the lower surface (back surface) side of the left and right side ends of the strip 1, and the electromagnets 5 and 6 are on the upper surface (front surface) side of the left and right ends of the strip 1. In Patent Document 2, only the electromagnets 3 and 4 on the back surface side of the belt-like body 1 are used. In the present invention, the electromagnets 5 and 6 are provided on both the front and back surfaces of the belt-like body 1.

  The electromagnet 3 has an amplifier 13, the electromagnet 4 has an amplifier 14, the electromagnet 5 has an amplifier 16, and the electromagnet 6 has an amplifier 17. The amplifiers 13, 14, 16, and 17 are all connected to the control device 15, and the control device 15 controls the current flowing through the amplifiers 13, 14, 16, and 17, so that the electromagnets 3, 4, 5, and 6 are independent. Excited.

  In FIG. 1, the strip 1 is stretched over the transport roll 2 and travels in the direction of the arrow in FIG. 1, the meander detection sensor 11 is at a position facing the transport roll 2, and the strip 1 is in the traveling direction. Is provided at a position changed by approximately 90 °, and the meandering of the strip 1 is measured.

  In the belt-shaped meandering correction device having the configuration shown in FIG. 1, for example, when the belt-shaped body 1 is closer to the right in FIG. The meandering correction operation is performed as follows.

  In FIG. 1, the electromagnet 3 on the right side of the back surface of the band 1 is excited, and the electromagnet 6 on the left side of the surface of the band 1 is excited. Then, a force including a component in a direction intersecting the main surface 1 a of the strip 1 from the electromagnet 3 and the electromagnet 6 acts on the main surface of the strip 1. The attraction force by the electromagnet 3 is for displacing the strip 1 in the direction intersecting the main surface 1a (the direction of pulling down). On the other hand, the attraction force by the electromagnet 6 may displace the strip 1 in the direction intersecting the main surface 1a (the pulling direction), but the electromagnet 3 causes the left side of the strip 1 to be pulled downward and bends. It only has to be able to stop. In the embodiment, when the electromagnet 3 and the electromagnet 6 are excited, the belt-like body 1 facing the electromagnet 6 is set so as not to move from the position shown by the solid line in FIG.

  As a result, when the right side of the strip 1 is attracted by the electromagnet 3 and the left side of the strip 1 is attracted by the electromagnet 6, the strip 1 is inclined as shown by the dotted line 1 'in FIG.

  Further, when viewed from the side, the strip 1 on the electromagnet 3 side bends as indicated by a dotted line 1 'shown in FIG. At this time, the maximum displacement δ shown in FIGS. 1B and 1C occurs at the right edge of the strip 1 and the contact length between the right end side of the strip 1 and the transport roll 2 becomes long.

  Since the electromagnet 6 is also excited and attracts the left end side of the strip 1, the left end of the strip 1 is not pulled downward, and the position before the electromagnet 3 is excited can be maintained. Therefore, on the right end side of the belt-like body 1 in FIG. 1A, the length in contact with the transport roll 2 is longer than that on the left end side. As a result, the bobbin winding effect is exhibited, and the strip 1 moves to the left side of FIG.

  In the case where the strip 1 is opposite to the left side of FIG. 1A, the strip 1 is illustrated by exciting the electromagnets 4 and 5 instead of the electromagnets 3 and 6. The meandering can be corrected by inclining in the opposite direction to 1 (a) and moving the strip 1 to the right.

  The above is an example in which the electromagnets 3, 4, 5, 6 are provided on the entrance side of the transport roll 2, but even if they are provided on the exit side of the transport roll 2, the meandering can be corrected in the same manner. However, when the electromagnets 3, 4, 5, and 6 are provided on the exit side, the belt-like body 1 moves to the longer side that contacts the opposite side to the entry side.

  In the above-described embodiment, the amount of the maximum displacement δ of the out-of-plane deformation applied to the band 1 varies depending on the magnitude of the magnetic force applied to the main surface 1 a of the band 1, and the edge of the band 1 corresponds to the transport roll 2. The contact length is determined. And since the width direction speed | rate of the strip | belt shaped object 1 is decided by contact length, it becomes possible to perform exact meandering correction by controlling the moving direction and movement amount of the width | variety direction of the strip | belt shaped object 1 according to it. In addition, since the belt-shaped body 1 starts to move in the width direction at the same time as the belt-shaped body 1 is deformed, the meandering correction of the belt-shaped body 1 running on the transport roll 2 with good responsiveness can be performed. It becomes possible to do.

  The operation of giving out-of-plane deformation to the strip 1 with a press roll or the like may be performed by the operator manually operating the press roll while monitoring the meandering of the strip 1. Such a method by automatic control may be used.

  A method for automatically controlling the position in the width direction of the strip 1 will be specifically described. In the meandering correction device of FIG. 1, the meandering detection sensor 11 for measuring the position in the width direction of the strip 1, and the electromagnet 3 based on the position information in the width direction of the strip 1 from the meandering detection sensor 11, A control device 15 is provided for controlling the magnetic force of each of 4, 5, and 6, that is, the amount of suction (out-of-plane displacement) with respect to the band 1.

  The meandering amount of the strip 1 is measured by the meandering detection sensor 11 and the measured amount is input to the control device 15. The control device 15 calculates the operation amount so that the position deviation in the width direction of the strip 1 with respect to the target position becomes zero, and the electromagnets 3, 4, 5 so as to have an appropriate magnetic force corresponding to this operation amount. , 6 is adjusted. In this way, the meandering of the strip 1 running on the strip 1 can be automatically corrected at an accurate and high response speed. In addition, since the movement in the width direction of the band 1 is clearly correlated with the out-of-plane displacement amount given from the electromagnets 3 and 6 or the electromagnets 4 and 5 to the band 1 as described later. There is no waste in the amount of operation of the electromagnets 3, 4, 5, 6 and the power required to drive and control these electromagnets 3, 4, 5, 6 can be minimized.

  FIG. 2 is a view showing a meandering correction device for a band-shaped body that applies out-of-plane deformation to the band-shaped body 1 using a pressing roll in a second embodiment of the present invention. (A) is a front view, (b) is a side view, and (c) is a sectional view taken along the line CC of (a).

  FIG. 2 is an example in which a plurality of pressing rolls are provided on the upper and lower surfaces of the band 1 in order to give out-of-plane deformation to the band 1. That is, a plurality of pressing rolls 21 to 25 whose axial dimension is shorter than the width dimension of the band 1 are provided on the entrance-side lower surface (back side) of the band 1 stretched on the transport roll 2. 1 is arranged at a predetermined pitch in the width direction, and similarly, a plurality of pressing rolls 26 to 30 whose axial dimension is shorter than the width dimension of the strip 1 are arranged in the width direction on the entrance-side upper surface (front side). Is arranged.

  And the press rolls 21-30 are arrange | positioned with the attitude | position which made each axis | shaft parallel to the conveyance roll 2, and are each independently supported by the support body which is not shown in figure. The pressing rolls 21 to 30 are in contact with the strip 1 by moving in a direction approaching or separating from the strip 1 in the direction orthogonal to the main surface 1a of the strip 1 by the support, and are desired. The amount of out-of-plane deformation can be given.

  Each of these pressing rolls 21 to 30 is connected to the control device 15 and is configured such that the pressing amount for applying the out-of-plane deformation to the strip 1 is controlled independently for each pressing roll. The control device 15 is connected to a meandering detection sensor 11 that measures the position of the strip 1 in the width direction.

  In this case, the pressing rolls 21 to 30 on the entry side may be provided on the exit side of the transport roll 2, or may be provided on both the entry side and the exit side.

  In this example, in order to measure the width direction position of the strip 1, the width direction measurement position from the meander detection sensor 11 is input to the control device 15, and the control device 15 detects the width direction position deviation of the strip 1 with respect to the target width direction position. The amount of operation is calculated so that becomes zero, the amount of operation corresponding to the amount of operation is given to the lower pressing rolls 21 to 25 and the upper pressing rolls 26 to 30, and the pressing roll is strip-shaped corresponding to the amount of operation. By pushing in the direction approaching the body 1, an out-of-plane deformation of a desired size is given, and thereby the meandering correction control of the belt-like body 1 is performed.

  In the embodiment of FIG. 2, the target displacement amount of the band 1 is added to each of the pressing rolls 21 to 25, and the amount of pressing of each pressing roll is gradually changed, so that it overlaps with the dotted line 1 ′ on a straight line. They are lined up. Moreover, the direction of the press rolls 26 to 30 is such that the control device 15 calculates the amount of displacement of each press roll so that the press rolls 26 to 30 are arranged in a straight line, and presses the strip 1 between the press rolls 21 to 25.

  However, the pressing rolls are not limited to a linear arrangement. The linear arrangement may be a curved arrangement. In addition, instead of moving all of the pressing rolls 21 to 25 and the pressing rolls 26 to 30 on both the front and back sides of the belt-like body 1, as in the electromagnets 3 to 6 in FIG. The belt 1 may be moved in the opposite direction to give the strip 1 an inclination as shown by a dotted line 1 ′.

  In the meandering correction device for the belt-like body 1 shown in FIG. 2, the same effect as that of the device in FIG. 1 described above can be obtained, and a plurality of press rolls 21 arranged in a plurality of locations in the width direction of the belt-like body 1. By controlling the pressing amount of each of the belt 25 and the pressing rolls 26 to 30 with respect to the belt-like body 1, it becomes possible to give the belt-like body 1 a finer out-of-plane deformation, and expect more accurate meandering correction.

  FIG. 3 is a diagram showing a belt-like meandering correction device for applying an out-of-plane deformation to the belt-like body 1 by using a nozzle for injecting gas according to a third embodiment of the present invention. (A) is a front view, (b) is a side view, (c) is a sectional view taken along the line DD of (a).

  When the pressing roll cannot be brought into contact with the belt-like body, the gas is blown onto the main surface 1a of the belt-like body 1 in the vicinity of the conveying roll 2 as in the embodiment of FIG. The strip 1 can be deformed in the out-of-plane direction.

  As shown in FIG. 3, gas nozzles 31 and 32 are provided on the front surface side at positions corresponding to both end edges of the belt-like body 1 on the entrance side of the transport roll 2 on which the belt-like body 1 is stretched, and the gas nozzle 33 on the back surface side. , 34 are provided. Further, a meandering detection sensor 11 for detecting the position in the width direction of the strip 1 is provided. Each of the gas nozzles 31, 32 and the gas nozzles 33, 34 has an opening (not shown) so as to face the main surface 1 a of the belt-shaped body 1, and a gas is blown from the opening to the main surface to form a belt-like shape by dynamic pressure. An operation of giving out-of-plane deformation to the body 1 is performed.

  The gas nozzles 31, 32 and the gas nozzles 33, 34 are provided with valves 31 a, 32 a, 33 a, 34 a, respectively, and the flow rate and flow velocity of the gas blown out from each of the gas nozzles 31, 32 and the gas nozzles 33, 34 can be adjusted. . The opening degree of these valves 31 a, 32 a, 33 a, 34 a is controlled by the control device 15. Position information in the width direction of the strip 1 detected by the meander detection sensor 11 is input to the control device 15. Thereby, the control device 15 adjusts the dynamic pressure by controlling the gas blowing position, the flow rate, the flow velocity, and the like from the gas nozzles 31 and 32 and the gas nozzles 33 and 34 to the band-shaped body 1, and generates out-of-plane generated in the band-shaped body 1. It is possible to accurately control the deformation.

  That is, when the width direction measurement position from the meandering detection sensor 11 for measuring the position in the width direction of the strip 1 is input to the control device 15, the control device 15 has a width direction position deviation of the strip 1 relative to the target position. The operation amount is calculated so as to be zero, and an appropriate valve is selected from the valves 31a, 32a, 33a, and 34a corresponding to the operation amount, and the operation amount (opening information) calculated to the appropriate one is selected. Is output. Corresponding to this operation amount, by opening the valves 31a, 32a, 33a, 34a, gas is ejected from the gas nozzles 31, 32, 33, 34 at the desired flow rate and flow velocity, respectively, and blown onto the belt-like body 1, A desired out-of-plane deformation is applied to the body 1 to control the position in the width direction, and the meandering correction of the traveling band 1 is performed.

  For example, when the belt-like body 1 moves to the left in FIG. 3A, gas is injected from the gas nozzle 32 and the gas nozzle 33, and the belt-like body 1 is tilted as shown by a dotted line 1 ′ in FIG. . As a result, the length that the left side of the belt-like body 1 in FIG. 3A contacts the transport roll 2 is increased, and the belt-like body 1 moves to the right in FIG.

  The gas ejected from the gas nozzle 32 deflects the left end of the strip 1 downward, but the gas ejected from the gas nozzle 33 prevents the right end of the strip 1 from flexing downward, and the gas nozzle 33 ejects the gas. What is necessary is just to hold | maintain to the position (position shown as a continuous line) of the right end part of the state which does not carry out.

  When the belt-like body 1 moves to the right in FIG. 3A, gas is injected from the gas nozzle 31 and the gas nozzle 34, and the belt-like body 1 is inclined in the direction opposite to the dotted line 1 ′ in FIG. . As a result, the length of the right side of the belt-like body 1 in FIG. 3A that contacts the transport roll 2 is increased, and the belt-like body 1 moves to the left in FIG. The

  Thus, when the gas nozzles 31 and 32 bend the end of the strip 1 downward, the gas nozzles 33 and 34 prevent the opposite end from bending downward, so that the left end of the strip 1 And the contact length between the transport roll 2 and the belt-like body 1 at the right end can be reliably made different, and the meandering can be easily corrected.

  In this embodiment, as described above, the gas in the reverse direction is blown from the gas nozzles 31 and 34 or the gas nozzles 32 and 33 to the band 1, and the belt 1 is deformed out of plane by the dynamic pressure of the blown gas. Since the displacement (position) in the width direction of the belt-like body 1 is controlled by the pincushion effect, good reproducibility and quick response according to the flow rate and flow velocity of the gas blown from the gas nozzles 31, 32, 33, 34 to the belt-like body 1. Therefore, displacement control in the width direction of the belt-shaped body 1, that is, meandering correction can be performed.

  As a result, the same effects as those of the above-described embodiments can be obtained. In addition, since the reproducibility of the relationship between the out-of-plane deformation of the strip 1 and the displacement in the width direction generated according to the flow rate or flow velocity of the gas blown to the strip 1 is good, it is useless that does not contribute to the control in the width direction. The amount of gas sprayed is reduced, and the amount of gas used can be reduced. In particular, when an inert gas is used as the gas, the saving effect is great.

  Further, since out-of-plane deformation can be applied to the strip 1 in a non-contact manner, there is an advantage that damage to the surface of the strip 1 can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows an example of a structure of the meandering correction apparatus which enforces the meandering correction method of the strip | belt-shaped body which is one embodiment of this invention, (a) is a front view, (b) is a right view, (c) is It is BB sectional drawing of (a). In the 2nd Example of this invention, it is a figure which shows the meandering correction apparatus of the strip | belt-shaped body which gives an out-of-plane deformation to a strip | belt body using a press roll, (a) is a front view, (b) is a side view, (c) is the CC sectional view taken on the line of (a). In the 3rd Example of this invention, it is a figure which shows the meandering correction apparatus of the strip | belt-shaped body which gives out-of-plane deformation | transformation to a strip | belt body using the nozzle which injects gas, (a) is a front view, (b) is a side view FIG. 4C is a cross-sectional view taken along the line DD of FIG. It is a figure explaining the correction method of the conventional width direction, (a) is a top view, (b) is a side view, (c) is the sectional view on the AA line of (a). It is the figure which expanded a part of FIG.4 (c).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Strip | belt-shaped body 1a Main surface 2 Conveyance roll 3, 4, 5, 6 Electromagnet 11 Meander detection sensor 15 Control apparatus 21, 22, 23, 24, 25 Press roll 26, 27, 28, 29, 30 Press roll 31, 32, 33, 34 Gas nozzle

Claims (9)

  In a continuous sheet feed line for a belt-shaped body that continuously transports the belt-shaped body by a transport roll, the belt-shaped body is mainly disposed at one of the left and right sides in the transport direction of the belt-shaped body and a position separated from the one in the left-right direction. A method for correcting the meandering of a band-shaped body, characterized by displacing in a direction intersecting with a plane and opposite to each other.   The means for displacing the belt-like body in a direction intersecting the main surface is a displacement applying means provided on at least one of the entrance side and the exit side in the vicinity of the transport roll on which the belt-like body is stretched. The displacement applying means is provided on both the front and back surfaces of the belt-like body so as to be separated from each other in the left-right direction of the belt-like body. The method for correcting the meandering of a belt-like body according to claim 1, wherein another displacement applying means located on the opposite surface of the belt-like body is simultaneously actuated at a position spaced apart in the left-right direction of the belt-like body.   Three or more displacement imparting means are provided on each of the front and back surfaces of the strip, and the three or more displacement imparting means provided on one side of the strip each cross the main surface of the strip. The displacement amount is gradually changed from one end side to the other end side of the belt-like body, and a plurality of displacement applying means on the surface opposite to the one surface are provided with the displacement 3. The method of correcting a meandering of a belt-like body according to claim 2, wherein the belt-like body is displaced so as to come into pressure contact with the displacement applying means.   4. The method for correcting a meandering of a belt-like body according to claim 2, wherein at least a part of the displacement applying means is disposed in the vicinity of both left and right end portions in the transport direction of the belt-like body.   The method for correcting the meandering of a belt-like body according to any one of claims 2 to 4, wherein the displacement applying means is one of an electromagnet, a pressing roll, and a gas nozzle.   The position of the strip in the width direction is detected by a meandering detection sensor, and intersects the main surface of the strip by the displacement applying means so that the width direction positional deviation of the strip with respect to the target width direction position becomes zero. 6. The method for correcting the meandering of a belt-like body according to claim 2, wherein the amount of displacement in the direction is controlled by a control device.   In the continuous sheet feed line of the belt-like body that continuously conveys the belt-like body by the transport roll, at least one of the entrance side and the exit side in the vicinity of the transport roll on which the belt-like body is stretched is transported in the belt-like body Displacement imparting means for displacing the belt-like body in opposite directions in the direction intersecting the main surface at one of the left and right ends of the belt and a position spaced from the one end in the left-right direction is provided in the transport direction of the belt-like body. A belt-like meandering correction device, characterized in that it is provided on both front and back surfaces at two or more positions separated from each other on the left and right.   8. The belt-like meandering correction device according to claim 7, wherein at least a part of the displacement applying means is provided in the vicinity of both left and right ends in the transport direction of the belt-like body.   A meandering detection sensor for detecting a position in the width direction of the band-shaped body, and a main surface of the band-shaped body by the displacement applying means so that a positional deviation in the width direction of the band-shaped body with respect to a target width direction position becomes zero. The belt-like meandering correction device according to claim 7, further comprising a control device that controls the amount of displacement in the direction.

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