JP2019018971A - Meander correction system - Google Patents

Abstract

To provide a meander correction system capable of coping with an ultrathin work-piece or a soft work-piece and also coping with a low conveyance speed.SOLUTION: A meander correction system at least comprises a pair of rollers 3 and 4 clamping a sheet-like work-piece 2 continuously flowing in one direction. By forming the pair of rollers 3 and 4 respectively of an elastic material, allowing both ends 31a, 31b, 41a, and 41b of the respective rollers to move respectively independently toward the work-piece, and properly moving both ends 31a, 31b, 41a, and 41b of the respective rollers 3 and 4 toward the work-piece, contact surfaces 7 between the pair of rollers 3 and 4 and the work-piece 2 are varied in a direction vertical to a moving direction of the work-piece 2.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a meandering correction system, for example, a meandering correction system suitable for correcting the meandering of a workpiece when a particularly thin sheet-like (strip-shaped) workpiece such as paper, resin, or metal is conveyed.

  Patent Document 1 (Japanese Patent Application Laid-Open No. 5-147792) provides a sheet material meandering correction device for the purpose of providing a correction device capable of correcting the meandering of a sheet without leaving a permanent strain. The correction device includes a cylindrical or columnar first roll whose outer peripheral surface abuts against one surface of the sheet material, a second roll whose outer peripheral surface with crown abuts against the other surface of the sheet material, and first and second rolls And a detection unit for detecting the position of the sheet material on the downstream side of the sheet, and based on the detected position of the sheet material, the second roll is oscillated by the oscillating means to move the sheet material abutting unit, and the sheet It corrects the travel direction of the material. Further, as disclosed in Patent Document 1, when a sheet material is run along its longitudinal direction in a manufacturing process of a sheet material such as thin paper or a soft plastic sheet, the sheet material is meandered. If this is done, there is a risk that the vehicle will be separated (side-out) to the side, and the right and left positions may be required during traveling. In the conventional meandering correction device, a guide roll is arranged along the edge on the sheet side, the side edge is guided by this guide roll, and the meandering of the sheet material is corrected. Even when the edge is pressed and a crease is formed on the sheet material by the pressing, and the sheet material is sandwiched between the pair of guide rollers, the crease is similarly formed on the sheet material. In the invention disclosed in Patent Document 1, the second roll is swung by the swinging means so that the sheet material abutting portion extends in a direction substantially parallel to the axis of the first roll (the width direction of the sheet material). The movement of the corresponding portion of the contact portion is delayed by the movement, and the sheet material is bent in the moving direction.

  Patent Document 2 (Japanese Patent Application Laid-Open No. 8-53245) discloses a sheet meandering correction device that does not require an output generation device, has few failures even when operated in a bad environment, is relatively inexpensive, and has good responsiveness. I will provide a. This meandering correction device comprises a meandering detection roller composed of left and right detection rollers that rotate in contact with the side edge of the sheet state, a rotating shaft that transmits the rotation of the detection roller, and a dark roller provided between the detection rollers, In the same manner, the rotation of the left or right rotation shaft is changed to the rotation direction by the transmission means such as a gear or the like through a transmission means such as a gear or a feed screw rod, and the rotation of the left or right rotation shaft of the meander correction roller is changed in the rotation direction by the transmission means such as a gear. The meandering correction roller is also moved in opposite directions to adjust the angle of the rotation axis of the meandering correction roller with respect to the traveling direction of the sheet-like body. . As described above, in the meandering correction device disclosed in Patent Document 2, the inclination angle of the meandering correction roller can be changed by the difference in rotational force between the left and right detection rollers, and the flow deviating from the straight line can be corrected. is there.

  Patent Document 3 (Japanese Patent Laid-Open No. 2000-38244) discloses a sheet material meandering correction device that suppresses a change in sheet material feed speed associated with a meandering correction operation, and further suppresses the generation of waves in the sheet material. provide. This meandering correction device supports two meandering correction rollers provided with a constant axial angle θ in a parallel and rotatable manner so that the sheet material can be placed in an S shape. In addition, an inter-axis adjusting means is provided that changes the axial distance between the two meandering correction rollers while keeping the length of the travel path of the sheet material substantially constant. In addition, a wave height sensor for detecting the wave height of the sheet material during the meandering correction operation is provided, and when the wave height obtained as the output of this wave height sensor exceeds the set wave height, the meandering correction operation is stopped, The generation of waves is prevented.

Japanese Patent Laid-Open No. 5-147792 JP-A-8-53245 JP 2000-38244 A

  As described above, the meandering correction device deviates from the straight line by directing the meandering correction roller in the direction of travel in which the work is intended to be directed in the flow of the work, and by tilting it so as to make an angle with respect to the so-called flow direction. Although it corrects the flow, the workpiece conveyance speed is set according to the material of the workpiece and the content of the processing to the workpiece, especially when used in plating equipment, the conveyance speed is slow. For this reason, there arises a problem caused by a timer due to the distance between the meandering correction function unit and the position detection sensor. In addition, when the workpiece material is extremely thin or soft, the function of the correction function section is absorbed by the wrinkles and elongation of the workpiece material and does not function, or it does not function after a considerable time has passed. And further problems such as zigzag conveyance occur. Also, if the workpiece material is hard, it will sag on either the right or left instead of being wrinkled, causing deflection, which will appear at a location far from the correction point or position sensor, and which position will cause meandering This causes a problem that it becomes impossible to judge.

  In addition, the conventional meandering control has been performed by changing the direction and inclination of the rollers with cylinders, actuators, etc., so slip may occur in an oblique direction between the workpiece and the rollers, which may cause scratches. Is included.

  Accordingly, an object of the present invention is to provide a meandering correction system that can cope with an extremely thin workpiece and a soft workpiece and can also cope with a low conveyance speed.

  As described above, in order to correct meandering, when a sheet-like workpiece that continuously flows in one direction is displaced with respect to the flow direction, it is necessary to urge the workpiece in a direction to return it.

  For this reason, the present invention provides a meandering correction system comprising at least a pair of rollers for sandwiching a sheet-like workpiece that continuously flows in one direction, wherein each of the pair of rollers is formed of an elastic material, Both ends of the rollers can be independently moved toward the workpiece direction, and the contact surfaces between the pair of rollers and the workpiece can be obtained by appropriately moving both ends of each roller toward the workpiece direction. In the direction perpendicular to the moving direction of the workpiece. The elastic material for forming the roller is preferably a stretchable material such as synthetic resin, rubber, sponge, or silicon.

  With the above configuration, according to the present invention, when a sheet-like workpiece is moving in a normal movement direction (hereinafter referred to as a reference direction), a roller formed of an elastic material is used as the sheet-like workpiece. Since the contact surface shape between the roller and the sheet-like workpiece is a rectangular shape and the urging line applied to the workpiece by the roller is perpendicular to the reference direction, the force vector applied to the workpiece is The sheet-like workpiece is maintained in the reference direction because it is in the same direction as the reference direction.

  On the other hand, when a sheet-like workpiece meanders, the moving direction of the workpiece is inclined with respect to the reference direction of the workpiece. In this case, the contact surface of the roller with respect to the workpiece can be enlarged on one side of the roller by moving one end of the pair of rollers that sandwich the workpiece in a direction in which the rollers approach each other. The contact surface shape of the workpiece can be changed from the above-described rectangular shape to a trapezoidal shape in which the side in the reference direction on one side is larger than the side on the other side. For this reason, since the urging line to the workpiece by the roller becomes the trapezoidal leg side, the direction of the force applied to the workpiece by the roller with respect to the reference direction (the side opposite to the inclination of the movement direction of the workpiece) Since the workpiece can be inclined, the workpiece can be returned to the reference direction.

  In this case, the conventional meander detection means can be used as it is for meandering the workpiece. In addition, means for adjusting the approaching amount on one side of the roller may be provided corresponding to the meandering amount of the workpiece.

  The pair of rollers is preferably a driving roller that applies a force to move the workpiece.

  When the pair of rollers are driving rollers, when the contact surface on one side of the roller is increased, the urging line to the workpiece by the roller becomes the leg side on the upstream side of the trapezoidal contact surface. Therefore, the force vector urged by the workpiece is inclined to one side from the reference direction. As a result, the flow of the workpiece is adjusted in the direction of moving to one side of the workpiece.

  Furthermore, it is desirable that the pair of rollers are free rollers disposed on the upstream side of the driving roller that applies a force for moving the workpiece.

  When the pair of rollers is a free roller disposed on the upstream side of the driving roller that applies the force to move the workpiece, the workpiece is pulled by the driving roller, so the biasing line to the workpiece by the roller has a trapezoidal shape. Therefore, the force vector biased by the workpiece is inclined from the reference direction to the other side. Thereby, the flow of the workpiece is adjusted in the direction of moving to the other side of the workpiece.

  According to the present invention, the pair of rollers that sandwich the workpiece is formed of an elastic material, and both ends of the roller are movable in the workpiece direction, so that the contact surface between the workpiece and the roller changes in the left and right directions of the workpiece. Since the biasing lines corresponding to the leg sides of the trapezoidal contact surface can be inclined in the reference direction, the meandering of the workpiece can be reliably corrected with a simple structure. Further, since the biasing line of the rollers with respect to the workpiece can be easily changed simply by adjusting the proximity amount of one end of the pair of rollers, the meandering of the workpiece can be finely corrected.

FIG. 1A is a schematic plan view showing a configuration of a meandering correction system according to the present invention, and FIG. 1B is a schematic side view thereof. FIG. 2A is a schematic front view of the meandering correction system according to the present invention, and FIG. 2B is an explanatory view showing the contact surface shape between the roller and the workpiece. FIG. 3A is a front view showing a state in which one end of a pair of rollers is brought close to each other, and FIG. 3B is an explanatory view showing a contact surface shape between the roller and the workpiece. 3 (c) is an explanatory diagram showing the direction of the force applied to the workpiece by the roller. 4A is a front view showing a state in which the other ends of the pair of rollers are brought close to each other, and FIG. 4B is an explanatory view showing a contact surface shape between the roller and the workpiece. 4 (c) is an explanatory view showing the direction of the force applied to the work by the roller.

  Embodiments of the present invention will be described below with reference to the drawings.

  A meandering correction system 1 according to the present invention is basically constituted by a pair of rollers 3 and 4 that sandwich a sheet-like workpiece 2 that moves continuously, as shown in FIGS. 1 (a) and 1 (b). . In the present invention, first, the pair of rollers 3 and 4 includes cylindrical roller portions 30 and 40 each formed of an elastic material, and a rotating shaft 31 that rotatably holds each of the roller portions 30 and 40. , 41. In the first embodiment, the pair of rollers 3 and 4 are drive rollers. As a result, the workpiece 2 is clamped by the rollers 3 and 4 and pulled by the tension V1.

  With this configuration, as shown in FIGS. 2 (a), 2 (b), and 2 (c), the rotating shafts 31 and 41 of the rollers 3 and 4 have workpieces at both ends 31a, 41a, 31b, and 41b, respectively. Biasing forces W1, W2, W3, and W4 that bias in the direction are applied. As a mechanism for applying this urging force to the rotary shafts 31 and 41, a mechanism using a known method such as an actuator such as electric, pneumatic, hydraulic or hydraulic is desirable.

  When the work 2 does not meander, the urging forces W1, W2, W3, and W4 applied to the rotary shafts 31 and 41 are equalized (W1 = W2 = W3 = W4), so that the rollers 3 and 4 contact the work 2 As shown in FIG. 2B, the surface 6 has a rectangular shape including sides 61 and 62 along the moving direction of the workpiece 2 and sides 63 and 64 perpendicular to the moving direction of the workpiece 2. In this case, as shown in FIG. 2 (c), the tensile force Ds applied to the work 2 from the rollers 3 and 4 as drive rollers is applied in the vertical direction to the urging line 63 indicated by P1-P2. The vector of the tensile force Ds is the same as the moving direction of the workpiece 2 (reference direction).

  Further, as shown in FIG. 3A, when one side 31a, 41a of the rotating shafts 31, 41 of the rollers 3, 4 is brought closer to the work direction, in other words, one side 31a, 41a of the rotating shafts 31, 41, When the forces W1 and W2 applied to 41a are larger than the forces W3 and W4 applied to the other side 31b and 41b (W1, W2> W3, W4), the contact surface 7 between the rollers 3 and 4 and the workpiece 2 As shown in FIG. 3B, the base 71 on one side has an isosceles trapezoidal shape larger than the base 72 on the other side. As a result, as shown in FIG. 3C, the force (tensile force) by which the rollers 3 and 4 pull the workpiece 2 is applied to the leg side 73 (P1-P2) on the upstream side of the contact surface 7 having the isosceles trapezoidal shape. It will work vertically (tensile force Dc). As a result, the workpiece 2 is pulled to one side of the rollers 3 and 4.

  Further, as shown in FIG. 4A, when the other sides 31b and 41b of the rotating shafts 31 and 41 of the rollers 3 and 4 are brought close to the work direction, in other words, the other side 31b of the rotating shafts 31 and 41, When the forces W3 and W4 applied to 41b are larger than the forces W1 and W2 applied to one side 31a and 41a (W1, W2 <W3 and W4), the contact surface 7 between the rollers 3 and 4 and the workpiece 2 As shown in FIG. 4B, the base 72 on the other side has an isosceles trapezoidal shape larger than the base 71 on the one side. As a result, as shown in FIG. 4C, the force (tensile force) by which the rollers 3 and 4 pull the work 2 is applied to the leg side 73 (P1-P2) on the upstream side of the contact surface 7 having the isosceles trapezoidal shape. The tensile force Dc acting vertically is opposite to that shown in FIG. 3 described above, and the workpiece 2 is pulled to the other side of the rollers 3 and 4.

  As described above, when the rollers 3 and 4 are driving rollers, a force is applied in a direction in which the rotating shafts 31 and 41 of the rollers 3 and 4 approach one end 31a or 41a or the other end 31b or 41b. In addition, since the width of the contact surface 7 between the rollers 3 and 4 and the workpiece 2 in the moving direction of the workpiece 2 can be changed, the tensile force Dc acting on the workpiece 2 can be changed to one side or the other side. Therefore, when meandering occurs in the work 2, the roller 3 is simply adjusted by adjusting the force applied to the ends of the rotating shafts 31 and 41 of the rollers 3 and 4 so that the tensile force Dc acts in the direction opposite to the meandering direction. , 4 and the work surface 2 can be changed, so that the direction of the tensile force Dc applied to the work 2 can be easily changed, so that the meandering can be corrected efficiently.

  A meandering correction system 1 according to the present invention is basically constituted by a pair of rollers 3 and 4 that sandwich a sheet-like workpiece 2 that moves continuously, as shown in FIGS. 1 (a) and 1 (b). . In the present invention, first, the pair of rollers 3 and 4 includes cylindrical roller portions 30 and 40 each formed of an elastic material, and a rotating shaft 31 that rotatably holds each of the roller portions 30 and 40. , 41. In the second embodiment, the pair of rollers 3 and 4 are free rollers, and the work 2 is pulled by a driving roller 5 disposed on the downstream side. Thus, the workpiece 2 is pulled with the tension V2 on the downstream side of the rollers 3 and 4, and is pulled with the tension V1 on the upstream side of the pair of rollers 3 and 4 by the resistance force of the rollers 3 and 4 (V1 < V2).

  With this configuration, as shown in FIGS. 2 (a), 2 (b), and 2 (c), the rotation shafts 31 and 41 of the rollers 3 and 4 are respectively provided at both end portions 31a, 41a, 31b, and 41b. The urging forces W1, W2, W3, and W4 for urging in the work direction are applied. As a mechanism for applying this urging force to the rotary shafts 31 and 41, a mechanism using a known method such as an actuator such as electric, pneumatic, hydraulic or hydraulic is desirable.

  As in the case of the first embodiment, when the workpiece 2 does not meander, the urging forces W1, W2, W3, and W4 applied to the rotating shafts 31 and 41 should be equalized (W1 = W2 = W3 = W4). As a result, the contact surface 6 between the rollers 3 and 4 and the workpiece 2 has sides 61 and 62 along the moving direction of the workpiece 2 and a side 63 perpendicular to the moving direction of the workpiece 2 as shown in FIG. , 64 is a rectangular shape. In this case, as shown in FIG. 2C, the tensile force Fs applied to the workpiece 2 from the rollers 3 and 4 by the drive row 5 is applied in the vertical direction to the urging line 64 indicated by P3-P4. The vector of the tensile force Fs is the same as the moving direction of the workpiece 2 (reference direction).

  Further, as shown in FIG. 3A, when one side 31a, 41a of the rotating shafts 31, 41 of the rollers 3, 4 is brought closer to the work direction, in other words, one side 31a, 41a of the rotating shafts 31, 41, When the forces W1 and W2 applied to 41a are larger than the forces W3 and W4 applied to the other side 31b and 41b {(W1, W2)> (W3, W4)}, As shown in FIG. 3B, the contact surface 7 has an isosceles trapezoidal shape in which the base 71 on one side is larger than the base 72 on the other side. As a result, as shown in FIG. 3C, the force (tensile force) by which the driving roller 5 pulls the workpiece 2 is the leg on the downstream side of the contact surface 7 having an isosceles trapezoidal shape between the rollers 3 and 4 and the workpiece 2. It will work perpendicular to the side 74 (P3-P4) (tensile force Fc). As a result, the workpiece 2 is pulled to one side of the rollers 3 and 4.

  Further, as shown in FIG. 4A, when the other sides 31b and 41b of the rotating shafts 31 and 41 of the rollers 3 and 4 are brought close to the work direction, in other words, the other side 31b of the rotating shafts 31 and 41, When the forces W3 and W4 applied to 41b are larger than the forces W1 and W2 applied to one side 31a and 41a {(W1, W2) <(W3, W4)}, As shown in FIG. 4B, the contact surface 7 has an isosceles trapezoidal shape in which the base 72 on the other side is larger than the base 71 on the one side. As a result, as shown in FIG. 4C, the force (tensile force) by which the driving roller 5 pulls the workpiece 2 is the leg on the downstream side of the contact surface 7 having the isosceles trapezoidal shape between the rollers 3 and 4 and the workpiece 2. The tensile force Fc acting perpendicularly to the side 74 (P3-P4) is pulled to the other side of the rollers 3 and 4, contrary to the above-described FIG.

  Thus, even when the rollers 3 and 4 are free rollers, the end portions 31a and 41a of the rotating shafts 31 and 41 of the rollers 3 and 4 or the other end portions 31b and 41b approach each other. Since the width of the contact surface 7 between the rollers 3 and 4 and the workpiece 2 in the moving direction of the workpiece 2 can be changed by applying a force in the direction, the tensile force Fc acting on the workpiece 2 is applied to one side or the other side. Therefore, when meandering occurs in the work 2, only the force applied to the ends of the rotating shafts 31 and 41 of the rollers 3 and 4 is adjusted so that the tensile force Fc acts in the direction opposite to the meandering direction. Since the contact surface 7 between the rollers 3 and 4 and the workpiece 2 can be changed, the direction of the tensile force Fc applied to the workpiece 2 can be easily changed, so that the meandering can be corrected efficiently. Things .

  Further, according to the present invention, unlike the first and second embodiments, the forces W1, W2, W3, and W4 applied to the workpiece 2 from both ends 31a, 41a, 31b, and 41b of the rollers 3 and 4 are expressed as (W1, By setting W3) <(W2, W4) or (W1, W3)> (W2, W4), a force can be applied to the work 2 so as to move the work 2 in the vertical direction.

DESCRIPTION OF SYMBOLS 1 Meander correction system 2 Workpiece 3, 4 Roller 5 Drive roller 6, 7 Contact surface 31, 41 Rotating shaft

Claims (3)

In a meandering correction system comprising at least a pair of rollers for sandwiching a sheet-like workpiece continuously flowing in one direction,
Each of the pair of rollers is formed of an elastic material;
Both ends of each roller can move independently toward the work direction,
A meandering correction characterized by changing the contact surfaces of the pair of rollers and the workpiece in a direction perpendicular to the moving direction of the workpiece by appropriately moving both ends of each roller in the workpiece direction. system.   The meandering correction system according to claim 1, wherein the pair of rollers are drive rollers that apply a force for moving the workpiece. The meandering correction system according to claim 1, wherein the pair of rollers are free rollers disposed upstream of a driving roller that applies a force for moving the workpiece.