JP2000086034A - Cross direction position control device for web - Google Patents

Abstract

PROBLEM TO BE SOLVED: To convey a web in a contactless state with relatively simple constitution by tilting a reverser to control the cross direction on the basis of the detected result of a sensor. SOLUTION: A device for conveying a long-sized web such as a film in a contactless state is provided with at least one sensor 3 in a specified place of a process, and at least one reverser 2 formed to be tiltable. On the basis of the detected result of the sensor 3, a reverser tilting device 4 of the reverser 2 is tilted to control a cross direction. All the reversers 2 are thus tilted to improve control accuracy. In addition, the sensors 3 are fitted to all the reversers 2, and all the reversers 2 are tilted, so that the web can be positively conveyed without lowering control accuracy. The web can therefore be stably conveyed being restrained from meandering caused by the cross direction discrepancy of tension balance and air quantity balance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for controlling a position in the width direction of a web, and more particularly to a width for conveying a long strip (hereinafter, referred to as a web) such as paper, thin steel plate, or film without contact. The present invention relates to a direction position control device.

[0002]

2. Description of the Related Art A device for controlling a position in a width direction by tilting a reverser (a device for blowing a compressed air or the like so as to make the web non-contact and floating in the air) is known (Japanese Utility Model Publication No. 61-2676). JP-A-62-185666.
issue). Also, a device for controlling the position in the width direction by tilting the upper and lower reversers in the same direction is known (JP-A-6-325).
02).

[0003]

In the conventional apparatus described above, when the web is continuously conveyed without contact, it is necessary to construct a control system at each turning point of the web, and the apparatus has been increased in size. Further, in the conventional apparatus, since the width end detection sensor is provided for each turning point, the apparatus is complicated. Furthermore, despite the mutual interference, the control was performed independently at each turning point, so that there was a problem in the control accuracy.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a width direction position control device capable of carrying a contactless web with a relatively simple structure.

[0005]

A first invention for solving the above-mentioned problems is as follows: (1) In a web non-contact conveyance device having a plurality of reversers, a width end detection sensor is provided at a predetermined position in this step. At least one reverser is provided, and at least one reverser is tiltable, and the control in the width direction is performed by tilting the reverser based on the detection result of the sensor.

According to the configuration of the present invention, meandering of the web due to a deviation of the tension balance and the air volume balance in the width direction can be suppressed, and stable conveyance can be performed. (2) A width end detection sensor is attached to all the reversers, and all the reversers are tilted.

According to the configuration of the present invention, the control accuracy can be improved by tilting all the reversers. (3) In addition, a width end detection sensor is attached to all the reversers, and it is determined whether or not the reversers need to be tilted according to the amount of displacement in the width direction, and only the reversers determined to need to be tilted are tilted. It is characterized by.

According to the configuration of the present invention, the lateral direction control can be performed without operating all the reversers. (4) A width end detection sensor is attached to a part of the reversers, and all the reversers are tilted.

According to the configuration of the present invention, instead of controlling each of the reversers independently, a wide end detection sensor is attached to some of the reversers, so that the number of sensors can be reduced and a good web can be formed. Transport control can be performed.

(5) A width end detection sensor is attached to a part of the reversers, and another part of the reversers is tilted. According to the configuration of the present invention,
By attaching the width end detection sensor to some of the reversers, by performing tilt control of another reverser,
Good web transport control can be performed while reducing the number of width edge detection sensors.

According to the second aspect of the present invention, (6) in a web non-contact conveyance device having a plurality of reversers, at least one width end detection sensor is provided at a predetermined position in this step, and at least a part of the reversers is provided. Makes the air volume variable in the width direction, based on the detection result of the width edge detection sensor, changes the air volume of the reverser, tension,
It is characterized in that control in the width direction is performed.

According to the configuration of the present invention, at least one width end detection sensor is provided, and at least a part of the reversers can be made to have a variable air flow, and the air flow can be changed to control the width direction. The control accuracy can be improved even for meandering due to balance or deformation of the web, and stable conveyance can be performed.

(7) In this case, it is characterized in that a width end detection sensor is attached to all reversers, and the air volume of all reversers is changed. According to the configuration of the present invention, the control accuracy can be improved by performing the air volume control of all the reversers.

(8) A width end detection sensor is attached to all of the reversers, and it is determined whether or not a change in the air flow of the reverser is required according to the amount of displacement in the width direction. It is characterized in that only the air volume is changed.

According to the configuration of the present invention, only the reversers determined to require a change in the air volume need to perform the width direction control, and efficient transport control can be performed. (9) A width end detection sensor is attached to a part of the reversers, and the air volume of all the reversers is changed.

According to the configuration of the present invention, the configuration can be simplified by controlling the air volume of all the reversers based on the output of the width end sensor attached to some of the reversers.

(10) Further, a width end detection sensor is attached to some of the reversers, and the air volume of another of the reversers is changed. According to the configuration of the present invention, since the air volume of the other reverser is changed by the output of the width end detection sensor attached to the reverser, the number of the width end detection sensors to be attached is reduced to simplify the configuration. can do.

(11) Also, only the upper reverser is tilted or the air volume is changed. According to the configuration of the present invention, the width direction position can be controlled by tilting only the gravity-applied reverser or changing the air flow.

(12) Further, the present invention is characterized in that only the reverser whose non-coated surface is on the reverser side is tilted or the air flow is changed. According to the configuration of the present invention, the application surface of the web does not adhere to the reverser.

(13) Further, the width direction position is measured at the entrance of the non-contact reverser, and the amount of tilting of the reverser or the amount of change in air volume is calculated from the amount of deviation and the amount of deviation in the width direction at each reverser. I have.

According to the configuration of the present invention, the amount of tilt or the amount of change in air flow of each reverser is obtained by calculation based on the position in the width direction measured at the entrance of the non-contact reverser, and the web is controlled by the calculated amount. Large disturbance such as bending of the vehicle can be predicted, and control accuracy can be improved.

(14) Further, the position in the width direction is measured by each of the reversers, a correction value of the amount to be tilted by each of the reversers is calculated from all the measurement results, and the calculation result of each of the reversers is corrected to tilt. It is characterized in that the amount or the amount of air to be changed is calculated.

According to the configuration of the present invention, more stable and accurate lateral control can be performed by calculating the amount of interference between the reversers as the correction value. (15) Further, the present invention is characterized in that the width direction position is measured by each reverser, and the amount of each reverser to be tilted or the amount of air to be changed is calculated from all the measurement results.

According to the configuration of the present invention, the optimum amount of tilt or air flow considering the interference between the respective reversers is given to each of the reversers, and more stable and accurate control can be performed. Also,
The number of control arithmetic units can be reduced to one, and the apparatus can be simplified.

(16) Further, the present invention is characterized in that the position of the relevant reverser is predicted from the position measurement result of the immediately preceding reverser. According to the configuration of the present invention, the position of the reverser is predicted based on the position measurement result before the reverser, so that the width end detection sensor of the reverser can be made unnecessary.

(17) When the end in the width direction of the web deviates from the sensor measurable area, the reverser is tilted or the air flow is changed in a predetermined direction, and the end of the web in the width direction can be measured by the sensor. After returning to the area, the control is switched to the control based on the sensor detection result.

According to the present invention, it is possible to return to the correct conveyance control even when the sheet deviates in the width direction of the web. (18) Further, the present invention is characterized in that the tilt or the air volume is changed at a predetermined speed in a predetermined direction.

According to the configuration of the present invention, the conveyance control can be performed without the web deviating in the width direction. (19) Further, the present invention is characterized in that the tilt or the air volume is changed in a predetermined direction at a speed faster than the control calculation result when the width direction end is located at the end of the measurable area.

According to the configuration of the present invention, even when the sensor deviates from the sensor measurable area, it is possible to quickly return to the correct transport control.

[0030]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration diagram showing a first embodiment of the present invention. In the figure, 1 is a web, 2 is a reverser (gas outlet for changing the direction of the web),
Reference numeral 3 denotes a width end detection sensor (hereinafter simply referred to as a sensor) for detecting the width direction of the web disposed in the vicinity of the reverser 2. Reference numeral 4 denotes a reversing device that is connected to the reversing device 2 and tilts the reversing device 2. It is. The web 1 is turned at each reverser 2 and enters the next reverser, as shown in the figure. During this time,
The web 1 is transported without contact.

In the device configured as described above, at least one sensor 3 is provided at a predetermined position in the process, and at least one reverser is tiltable. Then, based on the detection result of the sensor 3, the reverser 2
Is tilted to control the width direction.

According to this embodiment, the control accuracy can be improved by inclining all the reversers. Further, according to this embodiment, the sensors 3 can be attached to all the reversers 2 and all the reversers 2 can be tilted. As a result, the web can be reliably transported without lowering the control accuracy.

Further, according to this embodiment, the sensors 3 are attached to all the reversers 2, and it is determined whether or not the reversers 2 need to be tilted according to the amount of displacement in the width direction. Only the reverser can be tilted. According to this, the lateral direction control can be performed without operating all the reversers.

According to this embodiment, the sensor 3 can be attached to a part of the reversers 2 and all the reversers 2 can be tilted. According to this, instead of controlling each of the reversers independently, by attaching the sensor 3 to some of the reversers, it is possible to perform good web conveyance control while reducing the number of sensors.

Further, according to this embodiment, the sensor 3 can be attached to a part of the reverser 2 and another part of the reverser 2 can be tilted. According to this, the tilt control of another reverser is performed by the sensor 3 attached to some of the reversers 2, so that good web transport control can be performed while reducing the number of the sensors 3.

According to this embodiment, only the upper reverser can be tilted. This allows
By tilting only the reverser 2 to which gravity is applied, the position in the width direction can be controlled.

Further, according to this embodiment, only the reverser whose non-coated surface is on the reverser side can be tilted. According to this, the application surface of the web does not adhere to the reverser.

FIG. 2 is a block diagram showing a second embodiment of the present invention. 1 are denoted by the same reference numerals. In the figure, 1 is a web, 2 is a reverser, 3
Denotes a width end detection sensor (sensor). 10 is an adjustment valve for adjusting the amount of air sent to the reverser 2 in the width direction,
Reference numeral 11 denotes a blower tube. The operation of the device configured as described above will be described below.

The air sent through the air duct 11 is
The air volume is adjusted in the width direction by the air volume adjusting valve 10 provided on the way. Then, since the position of the web 1 in the width direction can be known by the sensor 3, the airflow of the reverser 2 can be changed so that the web is centered, and the width direction can be controlled.

According to this embodiment, at least one sensor 3 is provided, and at least a part of the reversers 2 has a variable air volume in the width direction. Control can be performed, and control accuracy can be improved even for deformation of the web.

Further, according to this embodiment, the sensors 3 can be attached to all the reversers 2 to change the air volume of all the reversers. According to this, by controlling the air volume of all the reversers, it is possible to perform good web transport control.

Further, according to this embodiment, the sensors 3 are attached to all the reversers 2, and it is determined whether or not the change in the air flow of the reverser 2 is necessary or not according to the amount of displacement in the width direction.
The air volume of only the reverser 2 for which it is determined that the air volume needs to be changed can be changed. According to this, it is only necessary to perform the width direction control for only the reverser 2 that is determined to require a change in the air volume, and efficient transport control can be performed.

According to this embodiment, a sensor is attached to some of the reversers 2 and all the reversers 2 are mounted.
Can be changed. Thereby, the configuration can be simplified by performing the air volume control of all the reversers based on the sensor outputs attached to some of the reversers 2.

Further, according to this embodiment, a sensor can be attached to a part of the reversers, and the air volume of another part of the reversers can be changed. Thus, since the air flow of another reverser is changed by the output of the sensor attached to the reverser 2, the number of attached sensors can be reduced and the configuration can be simplified.

FIG. 3 is a block diagram showing a third embodiment of the present invention. 1 are denoted by the same reference numerals. In the figure, 6 is a web end signal which is an output of the sensor 3, 5 is a control calculator which receives the web end signal and performs a predetermined calculation, 7 is a control signal which is an output of the control calculator 5, It is in the reversing device 4. As described above, in this embodiment, the control calculator 5 tilts the reverser at the same position as the sensor measurement position.

Next, a specific example of the control calculation performed by the control calculator 5 will be described. The control operation is described in JP-A-7-267.
No. 445 was used. Here, when modeling a control system for controlling the position of the web 1 in the width direction, the amount of tilt of the turning member (reverser), the tilt speed of the turning member, the width direction position of the web 1, the speed in the width direction of the web, and Considering that the acceleration in the width direction of the web 1 is a factor affecting the control, the following model (state equation) is considered.

X ″ = a1 · X ′ + a2 · X + a3 · θ ′ + a4θ (1) where X is the position in the width direction of the web 1, X ′ is the speed in the width direction of the web 1, and X ″ is the web 1 Acceleration in the width direction of θ
Is the amount of tilt of the direction changing member (reverser) 2, and θ 'is the tilting speed of the direction changing member. a1 to a4 are parameters. Here, a method for obtaining the parameters a1 to a4 will be described. The reversers 2 are assumed to be continuously connected as shown in FIG.

First, voltages of a plurality of different frequencies are randomly applied to the reversing device 4 from the control calculator 5, and the amount of tilt of the reversing device 2 and the axial position of the web 1 at this time are controlled by the sensor 3 and the control device. The sample is measured and measured by the instrument 5. Then, parameters a1 to a4 of the equation (1) are calculated from the sampled data by the least square method.

To model the control system, it is necessary to further model the relationship between the input voltage to the reversing device 4 and the amount of tilt of the reversing member 2. This model is generally represented by the following equation.

Θ ′ = a5 · θ + b1 · u (2) In this equation, u is an input voltage to the tilting device 4, and a5 and b1 are parameters. Parameters a5 and b1
Can be obtained by applying a step-like voltage to the tilting device 4 and obtaining the amount of tilting of the reverser 2 at that time by a sensor, that is, by a step response method.

Then, a generally known state equation can be obtained from the equations (1) and (2). This equation of state is shown below.

[0052]

(Equation 1)

In the equation (3), p1 = a3 · a5 + a
4, p2 = a3 · b1. Then, the control gains f1 and f1 of the following equation are obtained using the state equation shown in the equation (3).
2. Find f3.

[0054]

(Equation 2)

In the equation (4), f1 to f3 are control gains in the control system. This control gain, f1, f2, f3
Can be determined by a generally well known optimal regulator. The calculation for obtaining the control gains f1 to f3 is performed by the control calculator 5, and the obtained control gains f1 to f3 are calculated.
f3 is stored in the storage unit in the control arithmetic unit 5 in advance.

First, the position X in the width direction of the web 1 is measured by the sensor 3, and then the tilt amount θ of the reversing member (reverser) 2 is measured by a sensor (not shown). Then, the previously measured axial position is subtracted from the currently measured width position X, and the result is divided by the time of the measurement interval of the width direction position to calculate the moving speed X ′ of the web 1 in the width direction.

Next, the control gains f1 to f3 stored in advance are read out from the storage unit, and the width direction position X, the tilt amount θ, and the movement speed X ′ in the width direction obtained in the above sequence are obtained. The read control gain f1,
The input voltage u to the reverser 2 can be calculated by applying f2 and f3 to the equation (4). The method of the control calculation is not limited to the method described above.

FIG. 4 is a block diagram showing a fourth embodiment of the present invention. The same components as those in FIG. 3 are denoted by the same reference numerals. In this embodiment, the control calculation is performed by adding the detection signal 9 of the axial end measuring device 8 provided at the entrance of the non-contact conveyance path to the general control method such as PID or the above-described calculation control method. It was made. That is, the position in the width direction is measured at the entrance of the non-contact reverser, and the amount of tilt of the reverser 2 is calculated from the amount of displacement and the amount of displacement in the width direction at each reverser.

Each control arithmetic unit 5 is provided with a storage unit, and stores the output of the width direction end measuring unit 8 measured at the entrance 15 of the non-contact conveyance path. Transfer path entrance 1 from web transfer speed
The time when the end measured at 5 reaches the corresponding reverser 2 is predicted, and the control calculation is performed using the corresponding width direction measured value. The edge measurement value measured at the transport path entrance 15 is not limited to being stored in the storage unit in the control calculator 5 provided in each of the reversers 2, and for example, a dedicated storage device may be provided. Conceivable.

In the case of the figure, not only the upper reverser,
The same can be applied to the lower reverser. According to this embodiment, the amount of tilt of each reverser 2 is obtained by calculation based on the width direction position measured at the non-contact reverser entrance, and the web can be controlled by the calculated amount.

FIG. 5 is a block diagram showing a fifth embodiment of the present invention. The same components as those in FIG. 4 are denoted by the same reference numerals. In the figure, reference numeral 20 denotes an output of the width end detection sensor 3 of each of the reversers 2, and the result is represented by a control signal 11.
Is a correction arithmetic unit which is provided to each control arithmetic unit 5.

In the apparatus configured as described above, the correction arithmetic unit 20 receives the measurement results of all end positions, predicts the disturbance such as the deformation amount of the web 1, and calculates the correction amount when passing through each reverser. The correction signal (reverser drive signal) 11 is supplied to the control arithmetic unit 5 of the reverser 2. The control calculation in each control calculator 5 performs a control calculation by adding the correction amount using a general control method such as PID or the above-described method. As a result, mutual interference between the reversers 2 can be prevented.

According to this embodiment, it is possible to provide an optimal amount of tilt to each of the reversers 2 and to perform accurate transport control. FIG. 6 is a configuration diagram showing a sixth embodiment of the present invention. In the figure, reference numeral 21 denotes a control arithmetic unit which receives all outputs of the respective sensors 3 and supplies a reverser drive signal 13 to all the reversers 2.

In the device configured as described above, the control arithmetic unit 21 receives the sensor outputs of all the reversers and performs control arithmetic collectively. Then, the control operation device 21 performs a control operation in consideration of the correlation with the end positions of the adjacent reversers 2 and performs optimal control of the entire transport path.

According to this embodiment, the corrected tilt amount signal is given to each of the reversers 2 so that accurate conveyance control can be performed. FIG. 7 is a configuration diagram showing a seventh embodiment of the present invention. The same components as those in FIG. 3 are denoted by the same reference numerals. In the figure, 14 is the sensor 3 in front of it.
Is an end prediction and control calculator that receives a tilt drive signal for tilting the reverser 2 in response to the output of the control unit.

In the apparatus configured as described above, in the reverser without the web width direction edge measuring device (sensor) 3, the edge in the corresponding reverser is predicted using the edge measurement result immediately before in the traveling direction. Then, a control operation is performed. In this case, the prediction accuracy can be improved by using not only the measurement result of the immediately preceding reverser but also the measurement result of the immediately succeeding one, the measurement result of the entrance of the non-contact transport path, and the like. As the control calculation in this case, a general control method such as PID can be used in addition to the above-described method.

According to this embodiment, the position of the reverser is predicted based on the position measurement result before the reverser, so that the sensor of the reverser 2 can be made unnecessary.

FIG. 8 is a structural view showing an eighth embodiment of the present invention, and is a diagram viewed from above. The same components as those in FIG. 3 are denoted by the same reference numerals. In the figure, reference numeral 15 denotes a control arithmetic unit which receives the output of the sensor 3 and controls the reversing device 4.

In the device configured as described above, when the end of the web has come off from the sensor 3, the direction in which the control operation device 15 comes off is determined, and the reverser 2 is moved in the direction in which the end returns into the sensor 3. After tilting at an arbitrary speed or a constant speed, and the end returns to the inside of the sensor 3, the control calculation is started again. The control calculation when the end is in the measuring instrument includes a general control method such as PID and a method as described above. In addition,
Regardless of which direction the end is displaced, the presence or absence of the web 1 in front of the sensor 3 can be detected, for example, by using an optical sensor for the measuring device.

According to this embodiment, when the end in the width direction of the web deviates from the sensor measurable area, the reverser 2 is tilted in a predetermined direction, and the end of the web 1 in the width direction is measured. After returning to the possible area, by switching to control based on the sensor detection result, it is possible to prevent deviation in the width direction of the web and to perform correct transport control.

Further, according to this embodiment, it is possible to incline at a predetermined speed in a predetermined direction. According to this, conveyance control can be performed without the web 1 deviating in the width direction.

According to this embodiment, it is possible to tilt in a predetermined direction at a higher speed than the control calculation result when the width direction end is located at the end of the measurable area. This makes it possible to speed up the transport process.

In the above-described embodiment, the tilt output u is obtained by using the equation (1) as a state equation in a reversal layout as shown in FIG. This formula was intended to work with the reverser alone. When the state equation taking into account the influence of other reversers is obtained, the following equation is obtained.

X ″ = a1 · X ′ + a2 · X + a3 · θ ′ + a4θ + b1 · X1 ′ + b2 · X1 + c1 · X2 ′ + c2 · X2 (5) where X1 ′: width direction in the adjacent reverser on the upstream side in the traveling direction Speed X1: Width position in the adjacent reverser on the upstream side in the traveling direction X2 ′: Width direction in the adjacent reverser on the downstream side in the traveling direction X2: Width position in the adjacent reverser on the downstream side in the traveling direction a1-a4, b1- b2, c1, and c2 are parameters.

By using the above method based on this formula,
The tilt output u can be obtained. FIG. 10 is a graph showing characteristics of the related art, and FIG. 11 is a graph showing characteristics of the present invention. (A) to (d) of FIG. 10 correspond to the reversers of the same number in (a) to (d) of FIG. As is clear from FIGS. 10 and 11, in the case of the conventional device, the width direction is largely shifted, but according to the present invention, the fluctuation in the width direction is within a small range.

[0076]

As described above in detail, (1) According to the first invention, in a web non-contact conveyance device having a plurality of reversers, a width end detection sensor is provided at a predetermined position in this step. And at least one reverser is tiltable, and the reverser is tilted based on the detection result of the sensor to control the width direction, whereby the tension balance and the air flow balance are shifted in the width direction. The meandering of the web can be suppressed, and stable conveyance can be performed.

(2) Further, by attaching a wide end detection sensor to all of the reversers and tilting all of the reversers, it is possible to improve the control accuracy by tilting all of the reversers.

(3) A width end detection sensor is attached to all the reversers, and it is determined whether or not the reversers need to be tilted according to the amount of displacement in the width direction. Only the reversers determined to need to be tilted are determined. By tilting, the lateral direction control can be performed without operating all the reversers.

(4) Further, by attaching a wide end detection sensor to some of the reversers and tilting all of the reversers, each of the reversers does not independently control, but some of the reversers have a wide width. By attaching the edge detection sensor, good web conveyance control can be performed while reducing the number of sensors.

(5) Further, by attaching a width end detection sensor to some of the reversers and tilting another part of the reversers, another width end detection sensor is attached to some of the reversers. The tilt control of the reverser is performed, and good web transport control can be performed while reducing the number of width end detection sensors.

(6) According to the second invention, in a web non-contact conveying device having a plurality of reversers, at least one width end detection sensor is provided at a predetermined position in this step, and at least a part of the reversers is provided. Makes the air flow variable in the width direction, based on the detection result of the width end detection sensor,
By controlling the tension and the width direction by changing the air volume of the reverser, at least one width end detection sensor is provided.
Provided, at least some of the reversers have a variable air volume,
The width direction can be controlled by changing the air volume,
Control accuracy is improved even for meandering due to tension balance, deformation of the web, and the like, and stable conveyance can be performed.

(7) In this case, a width end detection sensor is attached to all the reversers, and the air volume of all the reversers is changed to control the air volume of all the reversers, thereby improving the control accuracy. be able to.

(8) A width end detection sensor is attached to all the reversers, and it is determined whether or not a change in the air flow of the reverser is necessary or not according to the amount of displacement in the width direction. By changing only the air flow, only the reversers determined to need the air flow change need to perform the lateral direction control, and efficient transport control can be performed.

(9) Further, by attaching a width end detection sensor to some of the reversers, and changing the air volume of all the reversers, all of the reversers can be used based on the output of the width end sensors attached to some of the reversers. By performing the air volume control of the reverser, the configuration can be simplified.

(10) Further, by attaching a width end detection sensor to some of the reversers and changing the air flow of another part of the reverser, the output of the width end detection sensor attached to the reverser is used for other sensors. Since the air volume of the reverser is changed, the number of the width edge detection sensors to be attached can be reduced and the configuration can be simplified.

(11) In addition, by tilting only the upper reverser or changing the air flow, the width direction position can be controlled by tilting only the gravity-inverted reverser or changing the air flow.

(12) By inclining only the reverser whose non-coated surface is on the reverser side or changing the air flow, the coated surface of the web does not adhere to the reverser. (13) The non-contact reverser inlet is measured by measuring the width direction position at the non-contact reverser inlet portion and calculating the amount of tilt or air flow change of the reverser from the amount of the deviation and the amount of width position deviation at each reverser. By calculating the amount of tilt or the amount of change in air flow of each reverser based on the width direction position measured in step 2, and controlling the web with the calculated amount, it is possible to predict a large disturbance such as bending of the web, and control accuracy. Can be improved.

(14) Further, the width direction position is measured by each reverser, the correction value of the amount to be tilted by each reverser is calculated from all the measurement results, and the calculation result by each reverser is corrected to tilt. By calculating the amount or the amount of air to be changed, and calculating the amount of interference between the reversers as a correction value, more stable and accurate lateral control can be performed.

(15) Further, the width direction position is measured by each of the reversers, and the amount to be tilted or the amount of air to be changed of each of the reversers is calculated from all the measurement results, so that the optimum position in consideration of the interference between the respective reversers is obtained. By giving the amount of tilt or the amount of air to each reverser, more stable and accurate control can be performed. Further, the number of control arithmetic units can be reduced to one, and the apparatus can be simplified.

(16) The position of the relevant reverser is predicted from the position measurement result of the immediately preceding reverser, and the position of the reverser is predicted based on the position measurement result before the relevant reverser. Can be unnecessary.

(17) When the end in the width direction of the web deviates from the sensor measurable area, the reverser is tilted or the air flow is changed in a predetermined direction, and the end of the web in the width direction can be measured by the sensor. After returning to the area, by switching to the control based on the sensor detection result, it is possible to return to the correct transport control even if the control deviates in the web width direction.

(18) Further, by tilting or changing the air flow rate in a predetermined direction at a predetermined speed, the conveyance control can be performed without the web deviating in the width direction.

(19) Further, the sensor can be measured by tilting or changing the air flow at a speed faster than the result of control calculation when the width direction end is located at the end of the measurable area in a predetermined direction. Even in the case of deviating from the area, it is possible to quickly return to the correct transport control.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing a third embodiment of the present invention.

FIG. 4 is a configuration diagram showing a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram showing a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram showing a sixth embodiment of the present invention.

FIG. 7 is a configuration diagram showing a seventh embodiment of the present invention.

FIG. 8 is a configuration diagram showing an eighth embodiment of the present invention.

FIG. 9 is a diagram showing a layout of a reverser.

FIG. 10 is a diagram showing a conventional characteristic.

FIG. 11 is a diagram showing characteristics of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Web 2 Reverser 3 Width side edge detection sensor 4 Reverser tilting device.

Claims (19)

[Claims] 1. A web non-contact conveyance device having a plurality of reversers, wherein at least one width end detection sensor is provided at a predetermined position in this step, at least one reverser is tiltable, and the detection result of the sensor is provided. A width direction position control device for a web, characterized in that a width direction is controlled by tilting a reverser on the basis of the control. 2. The web width direction position control device according to claim 1, wherein a width end detection sensor is attached to all of the reversers, and all of the reversers are tilted. 3. A width end detection sensor is attached to all the reversers, and it is determined whether or not the reversers need to be tilted according to the amount of displacement in the width direction, and only the reversers determined to need to be tilted are tilted. The web width direction position control device according to claim 1, characterized in that: 4. The web width direction position control device according to claim 1, wherein a width end detection sensor is attached to some of the reversers, and all of the reversers are tilted. 5. The web width direction position control device according to claim 1, wherein a width end detection sensor is attached to a part of the reversers, and another part of the reversers is tilted. 6. A web non-contact conveying device having a plurality of reversers, wherein at least one width end detection sensor is provided at a predetermined position in this step, and at least a part of the reversers has a variable air volume in the width direction. A width direction position control device for a web, characterized in that, based on the detection result of the width end detection sensor, the air flow of the reverser is changed to control the tension and the width direction. 7. The web width direction position control device according to claim 6, wherein a width end detection sensor is attached to all of the reversers to change the air volume of all of the reversers. 8. A width end detection sensor is attached to all of the reversers, and it is determined whether or not a change in the air flow of the reverser is required according to the amount of displacement in the width direction. 7. The web width direction position control device according to claim 6, wherein: 9. The web width direction position control device according to claim 6, wherein a width end detection sensor is attached to some of the reversers to change the air volume of all the reversers. 10. The web width direction position control device according to claim 6, wherein a width end detection sensor is attached to a part of the reversers, and the airflow of another part of the reversers is changed. 11. The web width direction position control apparatus according to claim 1, wherein only the upper reverser is tilted or the air volume is changed. 12. The web width direction position control device according to claim 1, wherein only the reverser having the non-applied surface on the reverser side is tilted or the air flow is changed. 13. The method according to claim 1, wherein a width direction position is measured at a non-contact reverser entrance portion, and a tilt amount or a change amount of air flow of the reverser is calculated based on the deviation amount and the width direction position deviation amount of each reverser. 13. The web width direction position control device according to any one of 1 to 12. 14. A width direction position is measured by each reverser,
A method of calculating a correction value of an amount to be tilted or an air volume to be changed in each reverser from all measurement results, and calculating an amount to be tilted or an air volume to be changed by correcting the calculation result in each reverser. Item 13. The web width direction position control device according to any one of Items 1 to 12. 15. A width direction position is measured by each reverser,
The web width direction position control device according to any one of claims 1 to 14, wherein an amount of each reverser to be tilted or an air volume to be changed is calculated from all the measurement results. 16. The web width direction position control device according to claim 1, wherein the position of the relevant reverser is predicted from the position measurement result of the immediately preceding reverser. 17. When the end in the width direction of the web deviates from the sensor measurable area, the reverser is tilted or the air flow is changed in a predetermined direction, and the end of the web in the width direction is in the sensor measurable area. 2. The method according to claim 1, wherein the control is switched to a control based on a sensor detection result after returning.
6. The web width direction position control device according to any one of 6. 18. The web width direction position control device according to claim 17, wherein the inclination or the air volume is changed at a predetermined speed in a predetermined direction. 19. The tilt or air flow rate is changed in a predetermined direction at a speed faster than a control calculation result when an end in the width direction is present at an end of the measurable area. Web width direction control device.