JP2020063150A - Web meander correction device - Google Patents

Abstract

To provide a web meander correction device that is capable of correcting even a large web meander.SOLUTION: The web meander correction device includes: an adjustment roll 46 that horizontally converts a web W moving vertically through correction rolls 16, 18; a left arm part 48 that rotatably supports the rotation axis on the left side of the adjustment roll 46; a left adjustment part 52 that extends and contracts the left arm part 48 toward the web W; a right arm part 50 that rotatably supports the right side of the rotational axis of the adjustment roll 46; a right adjustment part 54 that extends and contracts the right arm part 50 toward the web W; and a meander sensor 58 that detects the meander amount of the web W to be corrected by the adjustment roll 46. The left adjustment part 52 or the right adjustment part 54 moves the adjustment roll 46 so that the meander amount detected by the meander sensor 58 is within a predetermined range.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a web meandering correction device.

  Long webs made of synthetic resin film, paper, cloth, metal foil, etc. are running at high speed during processing such as drying and coating, so the center of the web is displaced from the center line of the transport path. Lateral slippage, that is, meandering may occur.

  In order to correct such meandering of the web, there has been proposed a meandering correcting device that tilts a correction roll on which the web runs in the axial direction to correct the amount of meandering.

JP, 2002-284415, A

  In the meander correction device as described above, there is a problem that the meander of the web cannot be largely corrected only by the correction using the correction roll.

  Therefore, in view of the above problems, it is an object of the present invention to provide a web meandering correction device that can correct the meandering of the web even when the meandering of the web is large.

  The present invention is a correction roll that runs a web along a transport path in the front-rear direction, a pair of left and right support portions that rotatably support the correction roll, and a moving base provided with a pair of left and right support portions, A fixed base and the ones provided on the upper surface of the fixed base and symmetrically arranged about the center line of the transport path, each along an arc-shaped line centered on the position on the center line. A pair of left and right left and right rails that are formed, a left moving portion that is provided on the left side of the lower surface of the moving table and moves along the left rail, and a right moving portion that is provided on the right side of the lower surface of the moving table. A right moving part that moves along a rail, a table driving part that moves the moving table, an adjusting roll that changes the web that moves vertically through the correction roll to the front-rear direction, and a left side of the adjusting roll. Freely rotate the rotating shaft A left arm part to hold, a left adjusting part to expand and contract the left arm part toward the web, a right arm part to rotatably support a right rotation shaft of the adjusting roll, and a right arm part to expand and contract toward the web. A right adjusting unit, a first sensor for detecting a first meandering amount of the web corrected by the correction roll, and a second sensor for detecting a second meandering amount of the web corrected by the adjusting roll; ) Based on the first meandering amount detected by the first sensor, the correction roller is moved by the table driving unit so that the first meandering amount falls within a predetermined range, and (2) the second sensor. And a control unit that moves the adjustment roll by the left adjusting unit or the right adjusting unit so that the second meandering amount is within a predetermined range based on the second meandering amount detected by It is a web of meandering correction device.

  According to the present invention, even when the meandering of the web cannot be corrected only by the correcting roll, the meandering can be adjusted by the adjusting roll.

It is a side view of the meandering correction device of one embodiment of the present invention. It is a top view of the movable stand of a meandering correction device. It is a rear view of an adjustment roll. (A) is a schematic plan view of the web which runs the meandering correction device in a normal state, and (b) is a schematic rear view. (A) is a schematic plan view of the web which runs the meandering correction device in a meandering state, and (b) is a schematic rear view. It is a block diagram of a meandering correction device.

  Hereinafter, a meandering correction device 10 for a web W according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6. As shown in FIG. 1, the meandering correction device 10 is used after the drying process of the web W, and the web W is, for example, a synthetic resin film, a metal foil, a cloth, a paper, or the like.

  The web W is, for example, unwound from an unwinding device, coated with a coating liquid by a coating device, and carried into the rectangular parallelepiped heat insulating chamber 2 of the drying device 1. The web W carried into the heat insulating chamber 2 of the drying device 1 is blown with hot air from a plurality of nozzles 3 arranged above and below a linear transport path in the heat insulating chamber 2, and the applied coating liquid dries. To do. Since the web W that is carried out from the heat insulation chamber 2 of the drying device 1 after this may meander, the meandering correction device 10 of the present embodiment corrects the meandering and conveys it to the next step.

(1) Meandering correction device 10
Next, the meandering correction device 10 will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, a moving table 14 is arranged above the upper surface of a fixed table (frame) 12 on which the drying device 1 is arranged on the outlet side. The moving table 14 is formed of a pair of left and right moving support plates 15 and 15 and a fixed shaft 42 that fixes the pair of left and right moving support plates 15 and 15. A pair of left and right first support portions 20 and 20 are vertically provided from the front portions of the pair of left and right movable support plates 15 and 15, respectively, and the first correction roll 16 is rotatably supported therebetween. A pair of left and right second support portions 22, 22 respectively project laterally from the rear end portions of the pair of left and right movable support plates 15, 15 between which the second correction roll 18 is rotatably supported. The fixed shaft 42 is parallel to the rotation axes of the first correction roll 16 and the second correction roll 18.

  As shown in FIGS. 1 and 2, a pair of left and right left rails 24 and 26 are provided on the upper surface of the fixed base 12 with the center line S of the conveyance path of the web W as the center. When an arc-shaped line is drawn centering on an arbitrary point on the center line S of the transport path, the left rail 24 and the right rail 26 are located on that line, respectively.

  As shown in FIG. 1 and FIG. 2, a pair of left and right moving legs 28, 30 are provided below the pair of left and right moving support plates 15, 15, and the lower portion of the pair of left and right moving legs 28, 30 is provided. The left moving part 32 and the right moving part 34 are rotatably provided using the rotating shafts 29 and 31. The left moving unit 32 and the right moving unit 34 move the left rail 24 and the right rail 26, respectively. The left moving unit 32 is provided with a connecting member 40. A movement sensor 44 is provided near the left moving unit 32 and on the upper surface of the fixed base 12.

  As shown in FIGS. 1 and 2, on the upper surface of the fixed table 12 in the vicinity of the left moving section 32, a table driving unit 36 including an actuator is provided, and the tip of the shaft 38 of the table driving unit 36 is It is fixed to the connecting member 40 of the left moving unit 32. As the shaft 38 of the platform drive unit 36 expands and contracts, the left moving unit 32 moves along the left rail 24, and the left moving leg 28 rotatably attached to the left moving unit 32 moves. When the left-side moving support plate 15 moves along the left rail 24 on the arc-shaped line, the right-side moving support plate 15 moves with it, and the rotation axes of the first correction roll 16 and the second correction roll 18 are changed. , So as to be inclined by θ1 ° with respect to the normal line of the center line S (see FIG. 5A). That is, the first correction roll 16 and the second correction roll 18 are moved by the steering roller system so as to be inclined by θ1 ° with respect to the axial direction. Then, as the movement amount, the movement sensor 44 can detect the movement amount of the shaft 38 of the base driving unit 36.

  As shown in FIGS. 1 and 3, an adjusting roll 46 is arranged below the rear surface of the fixed base 12. The pair of left and right rotating shafts protruding from the adjusting roll 46 are rotatably supported by the pair of left and right left arm portions 48 and 50. The left arm portion 48 is extendable / contractible by a left adjusting portion 52 made of an actuator, and the right arm portion 50 is extendable / contractible by a right adjusting portion 54 made of an actuator. The left adjusting unit 52 and the right adjusting unit 54 are provided on the fixed base 12, respectively. In the initial position of the adjusting roll 46, the pair of left and right rotating shafts are horizontally arranged.

  As shown in FIG. 1, a guide roll 56 is provided behind the fixed base 12.

  As shown in FIG. 1, a meandering sensor 58 including a pair of left and right sensors for detecting the positions of both ears of the web W is provided between the second correcting roll 18 and the adjusting roll 46. Alternatively, only the position of one ear of the web W may be detected.

  As shown in FIGS. 1 to 3, the web W conveyed from the drying device 1 in the substantially front-rear direction is changed in direction so as to be held by the second correction roll 18 via the first correction roll 16, and is substantially changed. Move vertically from top to bottom. The web W moving in the up-and-down direction is held under the adjusting roll 46, is turned in the front-rear direction, and is conveyed to the next step via the guide roll 56.

(2) Electrical Configuration of Meandering Correction Device 10 Next, the electrical configuration of the meandering correction device 10 will be described with reference to the block diagram of FIG. 6. The left adjusting unit 52, the right adjusting unit 54, the platform driving unit 36, the movement sensor 44, and the meandering sensor 58 are connected to the control unit 62 including a computer, and further, the conveyance motor 60 for causing the web W to travel is connected. The transport motor 60 is, for example, a motor that rotates a winding roll of the winding device. This allows the web W to run with a constant tension.

(3) Operating State of Meandering Correction Device 10 Next, the operating state of the meandering correction device 10 will be described. Here, "meandering" means that the center line S of the conveyance path and the center of the web W in the left-right direction are displaced and laterally displaced, and "meandering amount" means the displacement amount. When the meandering occurs, one side portion of the web W becomes tense and the other side portion becomes loose. The meandering sensor 58 detects the positions of both ears of the web W, obtains the amount of lateral deviation from the positions, and uses this as the amount of meandering.

  When the web W is not meandering and is conveyed straight and normally, as shown in the plan view of FIG. 4A, the center line S of the conveyance path in the front-rear direction coincides with the center of the web W, and As shown in the rear view of FIG. 4B, the center line S of the vertical transport path and the center of the web W coincide with each other. In this case, the rotation axes of the first correction roll 16, the second correction roll 18, and the adjustment roll 46 are arranged side by side so as to be perpendicular to the center line S of the transport path. When the meandering sensor 58 detects the positions of both ears of the web W in this state, the control unit 62 can recognize that there is no lateral displacement and no meandering because the values are the same on the left and right sides.

  However, when the web W actually meanders as shown in FIG. 5, when the meandering sensor 58 detects the positions of both ears of the web W, the values shift to the left and right due to the lateral deviation due to the meandering. , It is possible to obtain the meandering direction and the lateral shift amount. Then, the meandering correction device 10 corrects the meandering. The correction of the meandering of the web W is realized by the following two-step control method.

(3-1) First Control Method The first control method will be described. The control unit 62 detects the meandering amount of the web W with the meandering sensor 58, moves the table driving unit 36 based on the meandering direction and the lateral deviation amount, and moves the table correction unit 16 to the first correction roll 16 and the second correction roll 18. The steering is performed while maintaining the parallelism, and as shown in FIG. 5A, the rotation axes of the first correction roll 16 and the second correction roll 18 are inclined by θ1 ° with respect to the normal direction of the center line S of the conveyance path, and the web is moved. Correct the meandering of W.

  The limit range in which the meandering can be corrected is until the position of the shaft 38 of the platform drive unit 36 detected by the movement sensor 44 reaches the movement limit. When the stroke limit (range of movement limit) of the shaft 38 of the platform driving unit 36 is 60 mm, if it is less than 60 mm, the meandering can be corrected. For example, as shown in FIG. 5A, the control unit 62 moves the shaft 38 of the table driving unit 36 to move the first shaft 38 when the web W is laterally displaced by 50 mm to the left side (the meandering direction is the left side). The right side of the correction roll 16 and the second correction roll 18 is moved forward of the left side. This corrects the meander.

  If the meandering can be corrected, the control unit 62 restores the position of the shaft 38 of the base driving unit 36 to the original position so that the first correction roll 16 and the second correction roll 18 are at right angles to the center line S of the transport path. To

  After that, the control unit 62 moves the first correction roll 16 and the second correction roll 18 to perform feedback control so that the meandering of the web W is corrected. When the meandering direction of the web W on the left and right is opposite, the movement is controlled to the left and right.

  However, when the meandering cannot be corrected even if the control unit 62 performs the above-described first control method, that is, the position of the shaft 38 of the platform drive unit 36 detected by the movement sensor 44 is the movement limit position (of the shaft 38). If the meandering cannot be corrected even when the stroke becomes 60 mm, the second control method for accommodating the meandering of the web W is performed so that the position of the shaft 38 of the platform drive unit 36 is within the movement limit position.

(3-2) Second Control Method The second control method will be described. The controller 62 is in a saturated state at the movement limit position where the meandering of the first correction roll 16 and the second correction roll 18 can be corrected to the maximum.

  At this time, it is assumed that the web W traveling in the up-down direction is in a slack state on the right side and in a tension state on the left side in FIG. In order to correct this considerably large meandering, as shown by the dotted line in FIG. 1, the right arm portion 50 of the adjusting roll 46 is moved from the initial position by a right length by the right adjusting portion 54 in the direction of pushing the loose web W (obliquely downward). Move and press. The position on the left side of the adjusting roll 46 is fixed at the initial position.

  By pressing only the right side of the adjusting roll 46, only the path length on the right side of the slack state of the web W becomes longer and becomes a tension state, the large meandering of the web W is corrected, and the meandering amount detected by the meandering sensor 58 becomes: It becomes lateral deviation (meander) within the movement limit position. The “path length” means the distance when the web W travels on the transport path, and when the web W is running straight, the same distance is used on both the left and right sides of the web W. Path length> path length on the left side.

  After that, the controller 62 corrects the meandering of the web W by performing the above feedback control only by the first control method.

  The meandering correction by the adjusting roll 46 can be made not only on the conveyance path before and after the adjusting roll 46, but also from the position where the adjusting roll 46 is carried out from the heat insulating chamber 2. The reason is that the first correction roll 16 and the second correction roll 18 correct the web W by changing the transport direction of the web W by θ1 °, whereas the adjustment roll 46 presses the slack side web W and passes it. This is because the web W can be corrected from the position where the meandering of the web W starts by lengthening the length of the web W so that the left and right sides are evenly tensioned and the web W is pulled straight along the conveyance path.

  Further, the correction of the meandering is the adjusting roll 46 for converting the web W moving from the upper side to the lower side in the front-back direction, so that the holding angle is large and the pulling force is easily applied, and one side of the adjusting roll 46 (for example, Since only the right side) is pressed diagonally downward, the web W can be pressed on one side without the adjusting roll 46 slipping, which is an effect that can be realized.

(4) Effects According to this embodiment, when the meandering of the web W cannot be corrected only by the first correcting roll 16 and the second correcting roll 18, the meandering is further corrected by using the adjusting roll 46, so that the meandering is surely performed. Can be fixed.

  Further, the meandering correction by the adjusting roll 46 can be made not only on the conveyance path before and after the adjusting roll 46, but also from the position where it is carried out from the heat insulating chamber 2. Therefore, even if the web W is meandering when it is carried into the heat insulating chamber 2, the meandering of the web W in the heat insulating chamber 2 can be corrected.

(5) Modifications In the above embodiment, the two correction rolls 16 and 18 are used, but instead of this, only one correction roll may be used.

  Further, in the above-described embodiment, the left and right positions of the adjusting roll 46 are moved by the left adjusting unit 52 and the right adjusting unit 54 which are actuators, but instead of this, they may be manually moved.

  Further, in the above-described embodiment, the number of the meandering sensor 58 is one, but the first meandering sensor that detects the first meandering amount of the web W that is corrected by the correction rolls 16 and 18 and the web W that is corrected by the adjusting roll 46. A second meandering sensor for detecting the second meandering amount may be provided.

  Further, in the above-described embodiment, the web W loaded into the heat insulating chamber 2 of the drying device 1 travels along the linear transport path in the heat insulating chamber 2, but instead of this, the web having the arched heat insulating chamber is dried. The web W may be loaded from the device 1. The arch-shaped heat insulating chamber is a straight line when the transport path is viewed from a plane, and has a bow shape in which the central portion projects upward when viewed from the side.

  In addition to the configuration of the above-described embodiment, a tension detecting device is attached to the pair of left and right rotating shafts of the second correction roll 18, and it is assumed that there is slack on the side of weak tension due to the left and right tensions of the web W. The adjusting roll 46 may be moved together.

  Moreover, although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are also included in the invention described in the claims and the scope equivalent thereto.

10 ... Meandering correction device, 12 ... Fixed base, 14 ... Moving base, 16 ... First correction roll, 18 ... Second correction roll, 24 ... Left rail, 26 ... -Right rail, 36 ... Platform drive section, 46 ... Adjustment roll, 48 ... Left arm section, 50 ... Right arm section, 52 ... Left adjustment section, 54 ... Right adjustment section, 58 ... Meander sensors

Claims (10)

A correction roll that runs the web along the transport path in the front-rear direction,
A pair of left and right support portions that rotatably support the correction roll,
A moving table provided with a pair of left and right supporting portions,
A fixed base,
Left and right provided on the upper surface of the fixed base and symmetrically arranged about the center line of the conveyance path, and formed along arc-shaped lines centered on the position on the center line. A pair of left and right rails,
A left moving unit that is provided on the left side of the lower surface of the moving table and moves along the left rail,
A right moving unit that is provided on the right side of the lower surface of the moving table and moves along the right rail,
A table driving unit for moving the moving table,
An adjusting roll for converting the web moving in the vertical direction through the correction roll in the front-back direction,
A left arm portion that rotatably supports the rotation shaft on the left side of the adjustment roll,
A left adjusting portion for expanding and contracting the left arm portion toward the web,
A right arm portion that rotatably supports the rotating shaft on the right side of the adjusting roll;
A right adjusting portion for expanding and contracting the right arm portion toward the web,
A first sensor that detects a first meandering amount of the web that is corrected by the correction roll;
A second sensor for detecting a second meandering amount of the web corrected by the adjusting roll;
(1) Based on the first meandering amount detected by the first sensor, the correction roller is moved by the platform driving unit so that the first meandering amount falls within a predetermined range,
(2) Based on the second meandering amount detected by the second sensor, the left adjusting unit or the right adjusting unit moves the adjusting roll so that the second meandering amount falls within a predetermined range. A control unit,
A meandering correction device for a web. The control unit is
When it is detected that the left side of the web is slack based on the second meandering amount, the left adjusting unit extends the left arm portion from the initial position toward the web, and the left path of the web is passed. Lengthen,
When it is detected that the right side of the web is slack based on the second meandering amount, the right adjusting unit extends the right arm portion from the initial position toward the web to detect the right side of the web. Lengthen the path length,
The web meandering correction device according to claim 1. The control unit is
When extending the left arm portion toward the web by the left adjusting portion, the right arm portion is fixed at the initial position,
When the right arm portion is extended toward the web by the right adjustment portion, the left arm portion is fixed at the initial position,
The web meandering correction device according to claim 2. The control unit causes the table drive unit to move the correction roll so that the first meandering amount of the web decreases.
The web meandering correction device according to claim 2. The first sensor and the second sensor are common sensors,
The common sensor is provided on the conveyance path between the correction roll and the adjustment roll, both ears of the web, or a sensor for detecting the position of one ears,
The first meandering amount and the second meandering amount are a common meandering amount,
The web meandering correction device according to claim 3. The control unit is
(1) If the common meandering amount is within a predetermined limit range, the meandering of the web is corrected only by moving the correction roll,
(2) If the common meandering amount is out of the limit range, the adjusting roll is moved to adjust the meandering of the web.
The web meandering correction device according to claim 4. The controller, after adjusting the meandering of the web by adding the movement of the adjusting roll, fixes the position of the adjusting roll in the adjusted state,
The web meandering correction device according to claim 4. The limit range is a movement limit of the left moving unit and the right moving unit that are moved by the table driving unit, and the third sensor detects the moving limit of the table driving unit.
The web meandering correction device according to claim 6. The first sensor is a tension detecting device,
The second sensor is a sensor that detects the positions of both ears or one ear of the web,
The web meandering correction device according to claim 1. The correction roll is provided in two along the front-rear direction,
The web meandering correction device according to claim 1.

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