JP2014210632A - Method of adjusting position of sheet material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of adjusting the position of a sheet material which enables accurate correction of deviation of the position of a running sheet material in the width direction without use of a guide member guiding width-direction end sides of the sheet material.SOLUTION: A method of adjusting the position of a sheet material comprises holding a sheet material S vertically with a first pair 11 of rollers, moving the first upper roller 21 and the second lower roller 22 by the same distance in the width direction while a second pair of rollers 12 are made to wait at waiting positions where the second upper roller 23 and the second lower roller 24 do not come in contact with the sheet material. In releasing the sheet material by separating the first upper roller and the first lower roller each from the sheet material, the second upper roller and the second lower roller at the waiting positions are caused to approach the sheet material individually to hold the sheet material vertically and move in the width direction by the same distance, while the first pair of rollers after releasing the sheet material are moved to the waiting positions. The sheet material is thus moved continuously in the width direction through alternate execution of holding and moving the sheet material in the width direction by the first pair of rollers and the second pair of rollers.

Description

  The present invention relates to a sheet material position adjusting method for adjusting a position in a width direction of a traveling sheet material in a corrugated cardboard production line.

  The corrugated cardboard sheet is manufactured by an apparatus generally called a corrugator. In the corrugator, a single-faced corrugated sheet is manufactured by laminating a corrugated core and a back liner in a single facer, and a single-faced corrugated sheet and a front liner in a double facer, or multiple single-sided corrugated sheets. And a front liner are bonded to produce a cardboard sheet such as a double-sided cardboard sheet and a double-sided cardboard sheet. The manufactured corrugated cardboard sheet is creased and grooved by a slitter scorer in parallel with the running direction, and then cut in a direction perpendicular to the flow direction by a predetermined length.

  The above process is performed while running a sheet material such as a core, a liner, a single-sided cardboard sheet, and a double-sided cardboard sheet, but the position where the sheet material travels shifts in the width direction (direction perpendicular to the running direction). , Malfunctions may occur. For example, if the sheet material before pasting shifts in the width direction, the end sides in the width direction may become uneven between the pasted sheet materials. Generally, in order to ensure the dimensional accuracy in the width direction of the corrugated cardboard sheet, a drop allowance for cutting off both ends is set in advance, but if the uneven width at the edge exceeds the drop allowance, Corrugated cardboard is a waste subject and is a great waste. Further, if the sheet material is shifted in the width direction upstream of the slitter scorer, ruled lines and grooving are performed at the shifted position, and the size of the manufactured cardboard blank becomes inaccurate.

  On the other hand, a method of positioning the edges in the width direction of the traveling sheet material by facing a pair of vertically standing plate-shaped guide members separated by the width of the sheet material is a conventional method. More adopted. However, there are various standards for corrugated cardboard sheets, and there are many types of widths and lengths in units of mm. In addition, the corrugated cardboard sheets expand and contract due to the moisture of the glue and heat drying, and the amount of expansion and contraction is not constant. In addition, as described above, the edges in the width direction may be uneven between the bonded sheet materials. Therefore, it is difficult in the first place to accurately set the distance between the pair of guide members as the width of the sheet material, and it is difficult to accurately control the position in the width direction of the sheet material by the pair of guide members. there were. In addition, there is a disadvantage that the edge of the sheet material is damaged due to friction with the guide member, and the sheet material is bent along the guide member in the vicinity of the edge.

  Therefore, the present applicant has previously proposed various methods and apparatuses for adjusting the position in the width direction in which the sheet material travels (see, for example, Patent Document 1). In the technique of Patent Document 1, a wheel is constituted by a plurality of rollers each rotatable around an axis perpendicular to the wheel main axis (wheel rotation axis), and the wheel main axis matches the traveling direction of the sheet material. Contact the sheet material. If the position in the width direction of the sheet material is not changed, the roller is rotated to follow the travel of the sheet material without rotating the wheel around the wheel spindle, and the position of the sheet material is set to a distance in the width direction. When moving the wheel, the wheel rotates around the wheel spindle by an angle corresponding to the distance to be moved in the width direction without changing the direction of the wheel spindle while rotating the roller to follow the travel of the sheet material. It is intended to rotate.

  According to this technique, the position of the sheet material in the width direction can be adjusted very simply by simply rotating the wheel around the wheel spindle without changing the direction of the wheel spindle. The plurality of rollers constituting the wheel rotate freely following the traveling sea material, so that the traveling of the sheet material is not hindered even when the wheel is always in contact with the sheet material. In addition, the direction of the force applied to the sheet material by the rotation of the wheel is the width direction of the sheet material, and coincides with the direction in which the sheet material is to be moved. Thereby, there is an advantage that the distance to be moved is easily and accurately controlled.

  The present invention has been made for the purpose of developing a technique that achieves the same effect by means different from the above technique in the process of developing the position adjustment method and apparatus in the width direction of the sheet material by the applicant. It is a thing.

  Therefore, the present invention provides a sheet material that can accurately correct a shift in the position in the width direction of the traveling sheet material without using a guide member that guides the edge in the width direction of the sheet material. It is an object to provide a position adjustment method.

In order to solve the above problems, a method for adjusting the position of a cardboard sheet according to the present invention,
“Using a sheet material position adjustment device comprising a plurality of roller pairs each consisting of an upper roller and a lower roller that are rotatable around an axis parallel to the width direction of each traveling sheet material,
When moving the sheet material in the width direction,
The upper roller and the lower roller that sandwich the sheet material by sandwiching the sheet material from above and below while rotating the upper roller and the lower roller following the travel of the sheet material in a pair of the plurality of roller pairs Is moved the same distance in the width direction of the sheet material,
While the sheet material is sandwiched between a pair of the plurality of roller pairs, the other roller pairs are caused to wait at a standby position where the upper roller and the lower roller do not contact the sheet material,
When the sheet material is released by separating the upper roller and the lower roller of the pair of rollers that have been sandwiching the sheet material from the sheet material, the position is different from the position where the sheet material is opened, The upper roller and the lower roller of the roller pair at the standby position are brought close to the sheet material to sandwich the sheet material from above and below, and the upper roller and the lower roller sandwiching the sheet material are set to the width of the sheet material. And moving the roller pair with the sheet material released to the standby position while moving the same distance in the direction,
The sandwiching of the sheet material and the movement in the width direction are alternately performed by the plurality of roller pairs, and the sheet material is continuously moved in the width direction.

  “Sheet material” includes front / back liner, corrugated core, single-sided corrugated cardboard sheet, double-sided corrugated cardboard sheet, and sheet with front-liner bonded to two or more layers. pointing.

  In the present invention, a plurality of roller pairs each including an upper roller and a lower roller that are rotatable around an axis parallel to the width direction of the sheet material (hereinafter sometimes simply referred to as “width direction”) are used. A pair of these plurality of roller pairs is first used, and the sheet material is sandwiched from above and below by the upper roller and the lower roller. That is, the upper roller is brought into contact with the upper surface of the sheet material, and the lower roller is brought into contact with the lower surface of the sheet material at that position. In this state, when the upper roller and the lower roller are simultaneously moved in the width direction by the same distance, the sheet material sandwiched between the upper roller and the lower roller moves in the width direction. Therefore, when a deviation occurs in the position in the width direction in the traveling sheet material, the roller pair holding the sheet material is moved in the width direction opposite to the sliding direction by a distance corresponding to the deviation amount. The positional deviation in the width direction of the sheet material can be corrected.

  In such a method, the direction in which the roller pair is moved for correcting the positional deviation of the sheet material is the width direction opposite to the direction in which the sheet material is displaced. Therefore, when correcting misalignment in the width direction with a roller that rotates around an axis perpendicular to the sheet material or a roller that rotates around an axis parallel to the running direction of the sheet material, the rotation angle of the roller or the rotation angle of the roller However, in this method, it is easy to control the movement distance of the roller pair according to the amount of deviation of the sheet material.

  Further, when the sheet material is moved in the width direction, the sheet material is sandwiched from above and below by the upper roller and the lower roller, so that the force for moving the upper roller and the lower roller in the width direction is efficiently transmitted to the sheet material. The sheet material can be moved with high responsiveness. Further, since the upper roller and the lower roller that sandwich the sheet material are rollers that freely rotate around an axis parallel to the width direction of the sheet material, the upper roller and the lower roller rotate following the traveling of the sheet material. Thereby, the position shift in the width direction of the sheet material can be corrected without hindering the travel of the sheet material.

  By the way, when a sheet material in a cut state such as printer paper or copy paper is supplied, when a deviation occurs in the position in the width direction of the sheet material, the operation for correcting the deviation is performed on the sheet material. You only have to do it. On the other hand, the sheet material traveling on the corrugated board production line is manufactured by continuously supplying a very long base paper wound around a mill roll stand (base paper rack) at the upstream end. For this reason, once the positional deviation has occurred in the width direction, the sheet material usually continues to travel with the positional deviation occurring in the width direction until the base paper lot is switched. Therefore, it is necessary to continuously perform the operation for correcting the positional deviation in the width direction with respect to the traveling sheet material.

  On the other hand, in the present invention, a plurality of roller pairs each including an upper roller and a lower roller are used, and while the sheet material is sandwiched and moved in the width direction by one roller pair, the other roller pair is moved upward. When the roller pair that has moved the sheet material in the width direction by a predetermined distance while holding the sheet material in a standby state where the roller and the lower roller do not contact the sheet material opens the sheet material, The sheet material is clamped by the roller pair that has been in the standby position. Then, while the sheet material is moved in the width direction by the roller pair newly sandwiching the sheet material, the roller pair that has opened the sheet material is moved to the standby position. In this way, in this method, since the standby at the standby position, the holding of the sheet material and the movement in the width direction are alternately performed by a plurality of roller pairs, the movement of the sheet material in the width direction is continued. Can be done automatically. Accordingly, it is possible to effectively correct the positional deviation in the width direction of a very long sheet material traveling on the production line for corrugated cardboard sheets.

  It should be noted that the moment when the upper and lower rollers of the roller pair sandwiching the sheet material come into contact with the sheet material, and the moment when the upper and lower rollers of the roller pair sandwiching the sheet material so far release the sheet material. Need not be exactly the same, and there may be a short period of time during which the two roller pairs hold the sheet material together.

In addition to the above configuration, the sheet material position adjustment method according to the present invention includes:
“When the sheet material is clamped by the roller pair at the standby position, each of the upper roller and the lower roller is placed in the same width direction as the sheet material is moved by the other roller pair. Move it closer to the sheet material,
When the sheet material is opened by the pair of rollers that sandwiched the sheet material, the upper roller and the lower roller are moved in the same width direction as the sheet material has been moved until then. It can be “separated from the material”.

  If the upper roller and the lower roller of the pair of rollers to be sandwiched from now on approach in a direction perpendicular to the sheet material, when the sheet material is sandwiched by both rollers, There is a possibility that the sheet material that has been moved in the width direction by the pair is resistant to movement. On the other hand, in this method, the upper roller and the lower roller of the roller pair from which the sheet material is to be sandwiched are moved in the same width direction as that which has been moved by the other roller pair so far. As a result, it is possible to reduce the resistance when the upper roller and the lower roller of the roller pair that is about to sandwich the sheet material from coming into contact with the sheet material. Also, if the pair of rollers that previously held the sheet material releases the sheet material, the width of the upper roller and the lower roller should be separated if the upper roller and the lower roller are separated in a direction perpendicular to the sheet material. Since the moment when the moving speed in the direction becomes zero occurs, the brake is instantaneously applied to the movement of the sheet material that has been moved in the width direction until then. On the other hand, in this method, the upper roller and the lower roller of the pair of rollers that have held the sheet material until then are moved from the sheet material while moving in the same width direction as the direction in which the sheet material has been moved so far. Since they are separated from each other, the possibility of braking the movement of the sheet material can be reduced, and the upper roller and the lower roller can be separated.

  Therefore, according to this method, the sheet material can be smoothly sandwiched between different roller pairs.

In addition to the above configuration, the sheet material position adjustment method according to the present invention includes:
“The position adjusting device is disposed upstream and downstream of the slitter device that cuts the sheet material in parallel with the traveling direction,
At least the position adjusting device disposed downstream of the slitter device uses long rollers in the axial direction as the upper roller and the lower roller.

  Downstream of the slitter device, the sheet material is in a state of being divided in parallel with the traveling direction. Therefore, when the upper roller and the lower roller are short rollers in the axial direction, only a part of the divided sheet material is sandwiched between the upper roller and the lower roller, and the other portions sandwiching the cutting line are the upper roller and the lower roller. There is a risk that the roller will not be pinched. In that case, a force that moves the sheet material partially in the width direction acts, and a force that moves in the width direction does not act on other portions across the cutting line, so the sheet material is wrinkled or torn. Only the sheet material cannot be moved in the width direction. On the other hand, in this configuration, long rollers that are long in the axial direction are used as the upper roller and the lower roller, so that one upper roller or lower roller can be brought into contact with the sheet material across the cutting line. It becomes. Thereby, the generation | occurrence | production of the wrinkles and tearing in the sheet material divided | segmented in parallel with the running direction through the slitter apparatus can be suppressed, and the whole sheet material can be moved to the width direction.

  As described above, as an effect of the present invention, the shift in the position in the width direction of the traveling sheet material can be accurately corrected without using a guide member that guides the edge in the width direction of the sheet material. It is possible to provide a method for adjusting the position of a sheet material that can be used.

It is a perspective view of the position adjustment apparatus used for the position adjustment method of the sheet | seat material of 1st embodiment of this invention. FIG. 2 is a perspective view of a first upper roller and a first upper roller support device in the position adjustment device of FIG. 1. It is a top view of the position adjustment apparatus of FIG. FIG. 2 is a cross-sectional view taken along line AA in the position adjustment device of FIG. 1. It is a side view of two position adjustment apparatuses used for the position adjustment method of the sheet | seat material of 2nd embodiment of this invention. It is a top view of the position adjustment apparatus of FIG.

  Hereinafter, a sheet material position adjustment method (hereinafter, also simply referred to as “position adjustment method”) according to the first embodiment of the present invention, and a sheet material position adjustment device 1 suitable for this position adjustment method ( Hereinafter, the configuration of the “position adjustment device 1”) will be described with reference to FIGS.

  The position adjusting device 1 is a part of the traveling path of the sheet material S constituted by the mounting table 96 on which the traveling sheet material S is placed in the corrugated sheet production line, and an open portion that communicates the upper and lower spaces. 97. Here, the mounting table 96 can be configured by an upper surface of a plate on which the sheet material S is mounted and slid, and an upper surface of a conveyor on which the sheet material S is mounted and conveyed. In addition, here, the open portion 97 is illustrated by dividing the mounting table 96 into an upstream side and a downstream side so as to provide a gap. The open portion can be formed by providing a gap or by providing a through hole in a part of the mounting table.

  The position adjusting device 1 is rotatable about an axis 21p parallel to the width direction of the traveling sheet material S, that is, around an axis 21p parallel to the width direction of the mounting table 96 on which the traveling sheet material S is placed. A first upper roller 21 that is in contact with the upper surface of S, and a first lower roller 22 that is rotatable about an axis 22p parallel to the width direction of the mounting table 96 and that is in contact with the lower surface of the sheet material S. A pair of rollers 11, a second upper roller 23 that is rotatable around an axis 23 p parallel to the width direction of the mounting table 96 and abutted against the upper surface of the sheet material S, and a shaft 24 p parallel to the width direction of the mounting table 96. A second roller pair 12 including a second lower roller 24 that is rotatable around and is brought into contact with the lower surface of the sheet material S is provided.

  The first roller pair 11 and the second roller pair 12 are supported by a roller support frame. The roller support frame includes a sheet material between two pairs of support columns 69 erected in close proximity to both outer sides of the travel path of the sheet material S in the opening portion 97 and a pair of downstream support columns 69 of the two pairs. Between the first upper horizontal member 60a and the first lower horizontal member 60b spanned above and below S, and between the pair of columns 69 on the upstream side of the two pairs, above and below the sheet material S, respectively. A second upper horizontal member 60c and a second lower horizontal member 60d are provided. Here, the extending direction of the first upper horizontal member 60a, the first lower horizontal member 60b, the second upper horizontal member 60c, and the second lower horizontal member 60d is the width direction of the traveling sheet material S (mounting). (The width direction of the mounting table 96).

  A first upper roller support device 20a that supports the first upper roller 21 is provided on the first upper horizontal material 60a, and a first lower roller support device 20b that supports the first lower roller 22 is provided on the first lower horizontal material 60b. However, the second upper roller 60c supports the second upper roller 23 on the second upper horizontal member 60c, and the second lower roller support supports the second lower roller 24 on the second lower horizontal member 60d. Devices 20d are each attached.

  First, the first upper roller support device 20a will be described. As shown mainly in FIG. 2, the first upper roller support device 20 a includes a first upper slide body 31 that slides in parallel with the first upper horizontal member 60 a, and a first upper slide body 31 that moves up and down relative to the first upper slide body 31. An upper lifting body 41 is provided, and the first upper roller 21 is supported by the first upper lifting body 41. More specifically, the first upper slide body 31 has a rectangular frame shape in plan view, and slides by rotation of a ball screw 56 that is screwed into a screw hole formed in the first upper slide body 31. One end of the ball screw 56 is connected to one of the pair of support plates 51 fixed to the first upper horizontal member 60a so as to protrude upstream from the first upper horizontal member 60a, and the other end is a pair of The other side of the support plate 51 is rotatably supported. A motor 56m that rotationally drives the ball screw 56 is supported by the first upper horizontal member 60a in the vicinity of the one support plate 51. With this configuration, the ball screw 56 is driven by the motor 56m to rotate, so that the first upper slide body 31 is parallel to the first upper horizontal member 60a between the pair of support plates 51, that is, the sheet material S. Slide in the width direction.

  A guide bar 59 is attached between the pair of support plates 51 in parallel with the ball screw 56, and the guide bar 59 is inserted through a through hole provided in the first upper slide body 31. Accordingly, the first upper slide body 31 slides in the width direction of the sheet material S without rotating around the axis of the ball screw 56 as the ball screw 56 rotates.

  A projecting piece 61 projecting upward is attached to the first upper slide body 31, and a cylinder device 71 that operates by air or hydraulic pressure through the projecting piece 61 and moves the piston rod 71 b up and down is provided. The first upper slide body 31 is supported. The tip of the piston rod 71 b is connected to the first upper elevating body 41 through a connecting piece 66. As a result, the first upper elevating body 41 moves in the width direction of the sheet material S together with the first upper slide body 31 and moves up and down by driving the piston rod 71 b by the cylinder device 71. A rail 46 extending in the vertical direction is formed on the side surface of the first upper elevating body 41, and a ridge 36 that engages with the rail 46 is formed in the first upper slide body 31 so as to extend in the vertical direction. (See FIG. 4). Thereby, when the cylinder apparatus 71 advances and retracts the piston rod 71b, the 1st upper raising / lowering body 41 raises / lowers stably.

  The first upper roller 21 is rotatably supported by a U-shaped roller support portion 81. In addition, two shafts 86 projecting upward are fixed to a flat plate portion corresponding to the center of the U shape in the roller support portion 81, and the shafts 86 are holes that vertically penetrate the first upper elevating body 41. The part is inserted. A flange portion 86 b is formed at the tip of each shaft 86, and a coil spring 85 is disposed between the flange portion 86 b and the first upper elevating body 41. One end of the coil spring 85 is fixed to the flange portion 86 b and the other end is fixed to the first upper elevating body 41.

  With the above configuration, when the ball screw 56 is rotated by driving the motor 56m, the first upper roller 21 moves in the width direction of the sheet material S via the first upper slide body 31 and the first upper elevating body 41. Further, when the piston rod 71 b moves up and down by driving the cylinder device 71, the first upper roller 21 moves up and down via the first upper lifting body 41.

  The first lower roller support device 20b is configured by inverting the first upper roller support device 20a up and down, and the first lower roller support device 20b is rotated between a pair of support plates 52 by the rotation of a ball screw 57 driven by a motor (not shown). The piston rod 72b is supported by the first lower slide body 32 via a first lower slide body 32 that slides parallel to the lower horizontal member 60b and a projecting piece 62 that projects downward from the first lower slide body 32. A cylinder device 72 that advances and retreats in the vertical direction and a first lower elevating body 42 to which the tip of the piston rod 72 b is connected are provided, and the first lower roller 22 supported by the roller support portion 82 is interposed via the shaft 87. The first lower lifting body 42 is supported.

  The second upper roller support device 20c has the same configuration as the first upper roller support device 20a, and the second upper horizontal member 60c is interposed between the pair of support plates 53 by the rotation of the ball screw 58 driven by the motor 57m. A cylinder that is supported by the second upper slide body 33 via a second upper slide body 33 that slides parallel to the second upper slide body 33 and a projecting piece 63 that projects upward from the second upper slide body 33, and that causes the piston rod 73b to advance and retract in the vertical direction. The device 73 and a second upper elevating body 43 to which the tip of the piston rod 73 b is connected are provided, and the second upper elevating body 43 supported by the roller support portion 83 is connected to the second upper elevating body 43 via the shaft 88. It is supported by.

  The second lower roller support device 20d has the same configuration as that of the first lower roller support device 20b, and the second lower roller between the pair of support plates 54 by the rotation of a ball screw 59 driven by a motor (not shown). A second lower slide body 34 that slides parallel to the frame 60d and a projecting piece 64 that projects downward from the second lower slide body 34 are supported by the second lower slide body 34, and the piston rod 74b is moved vertically. A cylinder device 74 for advancing and retreating and a second lower lifting / lowering body 44 to which the tip of the piston rod 74 b is connected are provided. It is supported by the elevating body 44.

  Furthermore, the position adjusting device 1 includes a computer (not shown) including a main storage device, a central processing unit (CPU) that performs processing in accordance with a program stored in the main storage device, and an auxiliary storage device such as a hard disk. The main storage device calculates the displacement in the width direction of the sheet material S based on the image taken by the camera 91, controls the motor based on the calculated displacement amount, and respectively controls the bolt screws 56, 57, 58, 59. A position control program for controlling the movement of the first upper slide body 31, the first lower slide body 32, the second upper slide body 33, and the second lower slide body 34 in the width direction by rotation is stored.

  Further, the computer is connected to the production management device of the corrugated board production line or the office computer of the business operator so that wired communication or wireless communication is possible, so that information regarding the type and thickness of the sheet material S can be obtained. Or from the office computer at any time. Alternatively, the information regarding the type and thickness of the sheet material S can be acquired in advance from the production management device or the office computer, stored in the auxiliary storage device, and read and used. Then, the computer controls the driving of the cylinder devices 71, 72, 73, 74 to set the height positions of the first upper roller 21, the first lower roller 22, the second upper roller 23, and the second lower roller 24. A roller height adjustment program to be adjusted can be stored.

  The position adjustment method performed using the position adjustment apparatus 1 having the above-described configuration is such that when the sheet material S is moved in the width direction, the sheet material S is applied to the first upper roller 21 and the first lower roller 22 of the first roller pair 11. The sheet material S is sandwiched from above and below while rotating to follow the travel, and the first upper roller 21 and the first lower roller 22 sandwiching the sheet material S are moved in the width direction of the sheet material S by the same distance, and the first roller While the sheet material S is sandwiched between the pair 11, the second roller pair 12 waits at a standby position where the second upper roller 23 and the second lower roller 24 do not contact the sheet material S, and the first upper roller 21. When the sheet material S is released by separating the first lower roller 22 from the sheet material S, the second roller pair 12 at the standby position is different from the position where the sheet material S is released. Two upper rollers 23 and second lower roller 2 The sheet material S is sandwiched from above and below by approaching the sheet material S, and the second upper roller 23 and the second lower roller 24 sandwiching the sheet material S are moved the same distance in the width direction of the sheet material S, and the sheet By moving the first roller pair 11 that has released the material S to the standby position, the sheet material S is sandwiched and moved in the width direction between the first roller pair 11 and the second roller pair 12. The sheet material S is continuously moved in the width direction.

  More specifically, when the sheet material S is not displaced in the width direction, the first roller pair 11 and the second roller pair 12 are both placed in the standby position. In the present embodiment, the standby positions of the first roller pair 11 and the second roller pair 12 are both the center in the width direction of the rollers 21, 22, 23, 24 on the extended line of the center line in the width direction of the mounting table 96. The first upper roller 21 and the second upper roller 23 are at the rising end, and the first lower roller 22 and the second lower roller 24 are at the lower end.

  When the computer detects that a positional shift has occurred in the width direction of the sheet material S based on the image taken by the camera 91 disposed on the downstream side of the position adjusting device 1, the computer controls the cylinder device 71 to move up and down first. The first upper roller 21 is lowered through the body 41 and brought into contact with the upper surface of the sheet material S, and the first lower roller 22 is raised through the first lower elevating body 42 to contact the lower surface of the sheet material S. The sheet material S is sandwiched from above and below at the same position. At this time, the lowering position of the first upper roller 21 and the rising position of the first lower roller 22 are controlled according to the thickness of the sheet material S. In this embodiment, the camera 91 is disposed above the sheet material S, and the lighting device 95 images the sheet material S irradiated with light from below.

  At this time, a coil spring 85 is arranged on the shaft 86 connecting the first upper roller 21 to the first upper elevating body 41 and the shaft 87 connecting the first lower roller 22 to the first lower elevating body 42, respectively. Therefore, the sheet material S can be firmly sandwiched between the first upper roller 21 and the first lower roller 22 without excessively pressing the sheet material S due to its elasticity.

  Then, the first upper roller 21 and the first lower roller 22 sandwiching the sheet material S are respectively transferred to the sheet material S via the first upper slide body 31 and the first lower slide body 32 under the control of a motor by a computer. A distance corresponding to the amount of displacement is simultaneously moved in the width direction opposite to the direction of displacement. That is, the first upper slide body 31 and the first lower slide body 32 are configured to be moved by different ball screws 56 and 57 that are rotated by driving different motors, respectively, but both movements are performed synchronously.

  Thereby, the positional deviation of the sheet material S in the width direction is corrected. However, since the cause of the positional deviation in the width direction of the sheet material S (for example, the improper position of the mill roll stand) has not been removed, the sheet at the portion where the position adjusting device 1 is disposed. Even when the positional deviation in the width direction of the material S is corrected, the sheet material S traveling one after another is still in a state where the positional deviation has occurred in the width direction. For this reason, it is necessary to continuously perform the operation of correcting the positional deviation of the sheet material S in the width direction. However, the range in which the first upper roller 21 and the first lower roller 22 of the first roller pair 11 holding the sheet material S can move in the width direction is limited between the pair of support plates 51 and 52, respectively. It is impossible to continuously move the material S in one direction.

  Therefore, when the first roller pair 11 reaches a predetermined switching position, the second roller pair 12 that has been in the standby position until then holds the sheet material S therebetween. At this time, the second upper roller 23 and the second lower roller 24 of the second roller pair 12 are in the same direction as the direction in which the first roller pair 11 has moved the sheet material S until then, and the first While moving in the width direction at the same speed as the pair of rollers 11 has moved the sheet material S, the roller pair 11 descends and rises to approach the sheet material S and pinch the sheet material S. On the other hand, the first upper roller 21 and the first lower roller 22 of the first roller pair 11 that have sandwiched the sheet material S until then move up and down in the same direction at the same speed, respectively, and move up and down respectively. And the sheet material S is released.

  Thereby, the possibility of becoming resistance to the movement of the sheet material S in the width direction can be reduced, and the clamping of the sheet material S can be changed from the first roller pair 11 to the second roller pair 12. Note that the moment when the second roller pair 12 approaches the sheet material S and sandwiches the sheet material S and the moment when the first roller pair 11 separates from the sheet material S and releases the sheet material S are not necessarily strictly. There is no need to match, and there may be a time during which the sheet material S is sandwiched between the first roller pair 11 and the second roller pair 12 and moved in the width direction. The force applied to the sheet material S is different between the case where the sheet material S is sandwiched between the pair of rollers and the case where the sheet material S is sandwiched between the two pairs of rollers. If the movement of the first roller pair 11 and the second roller pair 12 is controlled by constantly detecting this and controlling the movement of the first roller pair 11 and the second roller pair 12, there is a problem whether the pair of rollers sandwiching the sheet material S is a pair or two pairs. Therefore, the positional deviation of the sheet material S can be corrected.

  Thereafter, the second upper slide body 33 and the second lower slide body 34 are slid by the computer control of the second upper roller 23 and the second lower roller 24 of the second roller pair 12 that newly sandwich the sheet material S, respectively. As a result, it is moved in the width direction. As described above, since the cause of the positional deviation in the width direction of the sheet material S is not removed, the sheet material S moved in the width direction tries to return to the original position. Therefore, the “movement of the roller in the width direction” referred to here is a relative movement with respect to the sheet material S to return to the original position.

  On the other hand, in the first roller pair 11 separated from the sheet material S, the first upper roller 21 rises to the ascending end, and the first lower roller 22 descends to the descending end, and both move to the center position in the width direction. Wait at the standby position. Thereafter, by repeating the above operation, the sheet material S is sandwiched and moved in the width direction alternately between the first roller pair 11 and the second roller pair 12, and the sheet material S is displaced in the width direction. Can be corrected continuously.

  As described above, according to the position correction method of the present embodiment, the direction in which the first roller pair 11 and the second roller pair 12 are moved in order to correct the positional deviation of the sheet material S is shifted. It is the width direction opposite to the direction where it is. Therefore, it is easy to control the movement distance of the first roller pair 11 and the second roller pair 12 according to the amount of deviation of the sheet material S.

  Further, when the sheet material S is moved in the width direction, since the sheet material S is sandwiched from above and below, the slide body (first body) is interposed via the ball screws 56, 57, 58, and 59 that are rotated by driving of the motor. The force for moving the upper slide body 31, the first lower slide body 32, the second upper slide body 33, and the second lower slide body 34) in the width direction can be efficiently transmitted to the sheet material S, and has high responsiveness. The sheet material S can be moved. Further, each of the rollers 21, 22, 23, 24 holding the sheet material S is a roller that freely rotates around an axis parallel to the width direction of the sheet material S, and is driven by the travel of the sheet material S. Therefore, the positional deviation in the width direction of the sheet material S can be corrected without disturbing the travel of the sheet material S.

  In addition, a configuration is adopted in which the sheet material S is alternately sandwiched between two pairs of rollers (the first roller pair 11 and the second roller pair 12), and the sheet material S is moved in the width direction. Therefore, the sheet material S, which is a very long sheet material, is moved continuously in the width direction when the position deviation in the width direction once occurs, and the position deviation in the width direction is shifted. It can be corrected.

  Next, the position adjustment method of the second embodiment and the position adjustment apparatuses 1 and 2 used in this position adjustment method will be described with reference to FIGS. In the second embodiment, two position adjusting devices 1 and 2 are used, one being arranged upstream of the slitter device 99 and the other being arranged downstream of the slitter device 99.

  The position adjusting device 1 disposed upstream of the slitter device 99 can use the position adjusting device 1 of the first embodiment, and can be used for imaging by the camera 92 disposed between the position adjusting device 1 and the slitter device 99. Based on this, the positional deviation in the width direction of the sheet material S is detected, and the positional deviation in the width direction of the sheet material S is corrected in the same manner as described above. On the other hand, the position adjusting device 2 arranged downstream of the slitter device 99 detects the positional deviation in the width direction of the sheet material S based on the image taken by the camera 93 arranged between the slitter device 99 and the position adjusting device 2. Then, the positional deviation in the width direction of the sheet material S is corrected. In the present embodiment, the cameras 92 and 93 are disposed above the sheet material S, and the lighting devices 95b and 95c respectively image the sheet material S irradiated with light from below.

  The operation in which the position adjusting device 2 corrects the positional deviation in the width direction of the sheet material S is the same as that of the position adjusting device 1, and the configuration of the device is substantially the same as that of the position adjusting device 1. The position adjustment device 2 is different from the position adjustment device 1 in that the first upper roller 21b is a long roller that is long in the direction of the shaft 21p, and the distance between the pair of support plates 51 is larger than that of the first embodiment. The roller 22b is a long roller that is long in the direction of the shaft 22p, the distance between the pair of support plates 52 is larger than that of the first embodiment, and the second upper roller 23b is a long roller that is long in the direction of the shaft 23p, and a pair of supports The distance between the plates 53 is larger than that of the first embodiment, the second lower roller 24b is a long roller that is long in the direction of the shaft 24p, and the distance between the pair of support plates 54 is larger than that of the first embodiment. Here, all the long rollers have a length close to the width of the sheet material S.

  The sheet material S that has passed through the slitter device 99 is divided into a plurality of parts by a cutting line CL parallel to the traveling direction. Therefore, if the first upper roller, the first lower roller, the second upper roller, and the second lower roller of the position adjusting device 2 are short rollers in the respective axial directions, one of the divided sheet materials S is used. There is a possibility that only the portion is sandwiched by the roller, and other portions sandwiching the cutting line CL are not sandwiched. In that case, the force that moves in the width direction is partially applied to the sheet material S, and the force that moves in the width direction does not act on the other part across the cutting line CL. Only the tear occurs, and the entire sheet material S cannot be moved in the width direction. On the other hand, in the position adjusting device 2, long rollers that are long in the axial direction are used as the first upper roller 21b, the first lower roller 22b, the second upper roller 23b, and the second lower roller 24b. Therefore, one roller can be brought into contact with the sheet material S across the cutting line CL. As a result, the entire sheet material S can be moved in the width direction while suppressing the occurrence of wrinkles and tears in the sheet material S divided in parallel with the traveling direction via the slitter device 99.

  When the sheet material S is displaced in the width direction when passing through the slitter device 99, the slitter device 99 is manufactured with reduced accuracy of processing for cutting the sheet material S parallel to the traveling direction. In the position adjustment method of the second embodiment, the position deviation is detected by the cameras 92 and 93 both upstream and downstream of the slitter device 99, and the sheet material S may be defective. Based on this, the positional deviation in the width direction of the sheet material S is corrected both upstream and downstream of the slitter device 99. Thereby, in the slitter apparatus 99, the sheet | seat material S can be cut | disconnected with high precision.

  The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements can be made without departing from the scope of the present invention as described below. And design changes are possible.

  For example, in the above embodiment, the operation of sandwiching the sheet material and moving it in the width direction is exemplified by the case where two pairs of rollers perform alternately, but the present invention is not limited to this, and three or more pairs of rollers are used. It is possible to use a configuration in which the operation of holding and moving the sheet material in the width direction is performed alternately.

1, 2, Position adjustment device (Cardboard sheet position adjustment device)
11 First roller pair (roller pair)
12 Second roller pair (roller pair)
21 First upper roller (upper roller)
22 First lower roller (lower roller)
23 Second upper roller (upper roller)
24 Second lower roller (lower roller)
21p, 22p, 23p, 24p Axis 99 parallel to the width direction of the sheet material S Slitting device S Sheet material

JP 2011-245709 A

Claims (3)

Using a sheet material position adjusting device comprising a plurality of roller pairs each consisting of an upper roller and a lower roller that are rotatable around an axis parallel to the width direction of each traveling sheet material,
When moving the sheet material in the width direction,
The upper roller and the lower roller that sandwich the sheet material by sandwiching the sheet material from above and below while rotating the upper roller and the lower roller following the travel of the sheet material in a pair of the plurality of roller pairs Is moved the same distance in the width direction of the sheet material,
While the sheet material is sandwiched between a pair of the plurality of roller pairs, the other roller pairs are caused to wait at a standby position where the upper roller and the lower roller do not contact the sheet material,
When the sheet material is released by separating the upper roller and the lower roller of the pair of rollers that have been sandwiching the sheet material from the sheet material, the position is different from the position where the sheet material is opened, The upper roller and the lower roller of the roller pair at the standby position are brought close to the sheet material to sandwich the sheet material from above and below, and the upper roller and the lower roller sandwiching the sheet material are set to the width of the sheet material. And moving the roller pair with the sheet material released to the standby position while moving the same distance in the direction,
A method for adjusting the position of a sheet material, characterized in that the sheet material is sandwiched and moved in the width direction alternately by the plurality of roller pairs, and the sheet material is continuously moved in the width direction. When the sheet material is clamped by the roller pair at the standby position, the upper roller and the lower roller are moved in the same width direction as the sheet material is moved by the other roller pair. While approaching the sheet material,
When the sheet material is opened by the pair of rollers that sandwiched the sheet material, the upper roller and the lower roller are moved in the same width direction as the sheet material has been moved until then. 2. The sheet material position adjusting method according to claim 1, wherein the sheet material is separated from the material. The position adjusting device is disposed upstream and downstream of a slitter device that cuts the sheet material in parallel with the traveling direction,
At least in the said position adjustment apparatus distribute | arranged downstream of the said slitter apparatus, a long roller long in an axial direction is used as the said upper roller and the said lower roller, The Claim 1 or Claim 2 characterized by the above-mentioned. Sheet material position adjustment method.

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