Slitting and scoring equipment

Abstract

To suppress progress of aged deterioration in a movement mechanism of a cardboard sheet processing tool while securing a yield of a cardboard sheet to be manufactured in order change.SOLUTION: A slitter scorer device 100 has: a cardboard sheet processing tool 100a having a plurality of slitters 1 and a plurality of scorers 52; a width direction movement mechanism and a vertical direction movement mechanism for moving the cardboard sheet processing tool in a width direction and a vertical direction; and a control device 102 for controlling the movement mechanisms. The control device controls the movement mechanisms so as to set target setup time for moving the cardboard sheet processing tool for order change on the basis of a cutter cut dimension cut by a cutter device 520 in the order change and sheet supply speed, to set target acceleration / deceleration speed for completing movement of the cardboard sheet processing in the target setup time, and to move the cardboard sheet processing tool at the target acceleration / deceleration speed.SELECTED DRAWING: Figure 13

Description

[Technical field]

[0001] The present invention relates to a slitter-scorer device that processes cardboard sheets that are continuously supplied along a supply line to provide them with cuts and creases. [Background technology]

[0002] Conventionally, a slitter-scorer device that makes cuts and creases in continuously supplied cardboard sheets is provided on the production line of a cardboard sheet production device (corrugator). Specifically, the slitter-scorer device has, as cardboard sheet processing tools, a plurality of slitters that are arranged in parallel in the width direction perpendicular to the supply direction (conveyance direction) of the cardboard sheet and that make cuts along the supply direction in the cardboard sheet with slitter knives, and a plurality of scorers that are arranged in parallel in the width direction and that make creases along the supply direction in the cardboard sheet with rolls.

[0003] In such a slitter-scorer device, for example, in order to change the number of sheets to be cut from a cardboard sheet, the widthwise length of one sheet to be cut, the position to add a crease to the cardboard sheet, etc., that is, in order to change the production order (so-called order change), the cardboard sheet processing tools are moved in the widthwise and vertical directions. Specifically, when an order change is made, the processing tools, including the multiple slitters and multiple scorers of the cardboard sheet processing tools, are moved in the widthwise and vertical directions to change the positions of the processing tools from those set in the old order to those to be set in the new order. In this case, the portion of the cardboard sheet that moves in the supply direction while the cardboard sheet processing tools are moving due to the order change becomes a defective portion. This defective portion is a portion that does not meet the requirements of the cardboard sheet to be produced in each of the old order and the new order, and is typically a portion without cuts and creases (or a portion with cuts or creases extending diagonally in one part).

[0004] Here, in the past, a technique has been proposed that aims to shorten the time required to move a corrugated sheet processing tool for an order change (hereinafter referred to as "setup time") in order to improve the yield of produced corrugated sheet by reducing the length of the defective portion along the supply direction (hereinafter referred to as "defect dimension" as appropriate) (see, for example, Patent Document 1). Typically, a technique is known in which the corrugated sheet processing tool is moved as quickly as possible when an order is changed in order to shorten the setup time. In a suitable example, the acceleration and deceleration (acceleration / deceleration) at which the corrugated sheet processing tool is moved in the vertical and width directions when an order is changed is set to the maximum acceleration and deceleration determined by the performance of the moving mechanism of the corrugated sheet processing tool (such as the performance of the motor), so that the corrugated sheet processing tool is moved as quickly as possible. According to this example, the setup time is minimized and the defect dimension is minimized. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 3717167 Summary of the Invention [Problem to be solved by the invention]

[0006] Meanwhile, a cutter device is provided downstream of the slitter-scorer device in the cardboard sheet production device, which cuts the cardboard sheet processed by the slitter-scorer device along the width direction. Usually, defective parts of the cardboard sheet that occur when the order is changed as described above are cut off by this cutter device. In one example, the cutter device is controlled to cut off a part of the cardboard sheet that is wider than the defective part, from the viewpoint of reliably cutting off the defective part. In this example, the cutter device is controlled so that the dimension along the supply direction of the cardboard sheet cut off by the cutter device when the order is changed (hereinafter referred to as the "cutter cutting dimension") becomes a fixed dimension (predetermined) that is somewhat longer than the defective dimension. For example, the cardboard sheet (defective sheet) including the defective part cut off by the cutter device in this way may be used as an underlay for stacked non-defective sheets. In this case, the fixed dimension is determined based on the dimension required for the underlay.

[0007] In another example, the cutter device is controlled to cut out the defective part of the cardboard sheet without excess or deficiency from the viewpoint of prioritizing the improvement of the yield of the cardboard sheet. That is, in this example, the cutter cutting dimension is set to the defective dimension itself (it may be set to a dimension slightly longer than the defective dimension (dimension with a margin)), and the cutter device is controlled when the order is changed. Meanwhile, for performance reasons of the cutter device, there is a limit value (minimum dimension) for the dimension of the cardboard sheet that can be cut by the cutter device. This limit value (hereinafter referred to as "cutter cutting limit dimension" as appropriate) is a value according to the feed speed of the cardboard sheet, specifically, the faster the feed speed, the longer the cutter cutting limit dimension becomes. Here, in the above-mentioned other example, when such a cutter cutting limit dimension is longer than the defective dimension, the cutter device cannot cut the cardboard sheet at the defective dimension for performance reasons, so it is controlled to cut the cardboard sheet at the cutter cutting limit dimension. In other words, in this case, since the cutter cutting dimension cannot be set to the defective dimension, the cutter device is controlled by setting the cutter cutting dimension to the cutter cutting limit dimension.

[0008] On the other hand, as described above, if the corrugated cardboard sheet processing tool is moved at a large acceleration / deceleration speed so as to shorten the setup time when the order is changed, the defective dimension is reduced. Then, if the cutter device is controlled by setting the thus reduced defective dimension as the cutter cutting dimension, the corrugated cardboard sheets (defective sheets) cut by the cutter device when the order is changed can be minimized, so that the yield of the produced corrugated cardboard sheets can be improved. However, in the case where the cutter cutting dimension is applied with a fixed dimension or a cutter cutting limit dimension instead of the defective dimension, moving the corrugated cardboard sheet processing tool at a large acceleration / deceleration speed so as to shorten the setup time when the order is changed does not lead to any improvement in the yield of the corrugated cardboard sheets. This is because, even if the defective dimension is reduced by moving the corrugated cardboard sheet processing tool at a large acceleration / deceleration speed, the cutter device cuts the corrugated cardboard sheet at a fixed dimension (a dimension longer than the defective dimension is applied) regardless of the defective dimension, or cuts the corrugated cardboard sheet at a cutter cutting limit dimension longer than the defective dimension because the defective dimension cannot be cut.

[0009] Even in cases where this does not lead to an improvement in yield, moving the corrugated board sheet processing tool at a high acceleration / deceleration speed, especially when moving the corrugated board sheet processing tool at the maximum acceleration / deceleration speed possible, places unnecessary strain on the moving mechanism of the corrugated board sheet processing tool, which results in the accelerated deterioration of the moving mechanism of the corrugated board sheet processing tool (such as wear of the ball screw).

[0010] The present invention has been made to solve the above-mentioned problems, and aims to provide a slitter-scorer device that can suppress the progression of deterioration over time of the moving mechanism of the cardboard sheet processing tool while ensuring the yield of produced cardboard sheets when an order is changed. [Means for solving the problem]

[0011] In order to achieve the above object, the present invention provides a slitter-scorer device that processes cardboard sheets that are continuously supplied along a supply line to impart cuts and creases, the cardboard sheet processing tool including a plurality of slitters arranged in parallel in a width direction perpendicular to the supply direction of the cardboard sheet and that impart cuts along the supply direction to the cardboard sheet, and a plurality of scorers arranged in parallel in the width direction and that impart creases along the supply direction to the cardboard sheet, the cardboard sheet processing tool including a width direction movement mechanism that moves each of the plurality of slitters and each of the plurality of scorers provided in the cardboard sheet processing tool in the width direction, a vertical direction movement mechanism that moves each of the plurality of slitters and each of the plurality of scorers provided in the cardboard sheet processing tool in the vertical direction, and a control device configured to control the width direction movement mechanism and the vertical direction movement mechanism, a cutter device that cuts the cardboard sheet processed by the slitter-scorer device along the width direction is provided downstream of the supply direction of the cardboard sheet, and the control device is configured to set a target setup time for moving the cardboard sheet processing tool in the width direction and up and down directions to change the position of the cardboard sheet processing tool in order to change the order of the cardboard sheet to be produced, based on a predetermined cutting dimension (cutter cutting dimension) along the supply direction of the cardboard sheet to be cut by the cutter device at the time of the order change and the supply speed of the cardboard sheet, set a target acceleration and deceleration speed when the cardboard sheet processing tool moves at the time of the order change so that the movement of the cardboard sheet processing tool for the order change is completed within the target setup time, and control the width direction movement mechanism and the up and down direction movement mechanism so that the cardboard sheet processing tool moves at the target acceleration and deceleration speed at the time of the order change.

[0012] According to the present invention configured in this way, the control device sets a target acceleration / deceleration in accordance with the cutter cutting dimensions and the current cardboard sheet supply speed (hereinafter referred to as "sheet supply speed" as appropriate) to be applied when changing an order, unlike the comparative example in which the target acceleration / deceleration is set from the viewpoint of shortening the setup time, i.e., the comparative example in which a relatively large target acceleration / deceleration is set to shorten the setup time (typically the maximum target acceleration / deceleration determined by the performance of the moving mechanism, etc.). Therefore, according to the present invention, a target acceleration / deceleration appropriate to the current cutter cutting dimensions and sheet supply speed (which tends to be smaller than the comparative example) is set, rather than a large target acceleration / deceleration being set uniformly as in the comparative example.

[0013] As a result, according to the present invention, when an order is changed, the load on the movement mechanism (widthwise movement mechanism and vertical movement mechanism) of the cardboard sheet processing tool can be reduced, and the progress of deterioration of the movement mechanism (such as wear of the ball screw) over time can be appropriately suppressed. On the other hand, in the present invention and the comparative example, the cardboard sheet is cut by the cutter device at the same cutter cutting dimensions when an order is changed, so the dimensions of the defective sheets generated are the same. Therefore, according to the present invention, as in the comparative example, the yield of the produced cardboard sheets can be appropriately ensured. As described above, according to the present invention, when an order is changed, it is possible to suppress the progression of deterioration over time of the moving mechanism of the cardboard sheet processing tool while ensuring the yield of the produced cardboard sheets.

[0014] In the present invention, the control device is preferably configured to set a target acceleration / deceleration speed based on a predetermined cutting dimension, a supply speed, and a widthwise movement distance and a vertical movement distance that the cardboard sheet processing tool should be moved for an order change, so that the movement of the cardboard sheet processing tool for an order change is completed within the target setup time. According to the present invention configured in this manner, by setting the target acceleration / deceleration based on the cutter cutting dimensions, sheet supply speed, widthwise movement distance, and vertical movement distance as described above, it is possible to accurately set a target acceleration / deceleration that can accurately achieve the target setup time.

[0015] In the present invention, the control device is preferably configured to refer to a matrix table in which four parameters, i.e., a predetermined cutting dimension, a supply speed, a widthwise movement distance, and a vertical movement distance, are associated in advance with target acceleration / deceleration to be applied in accordance with the four parameters, and to set a target acceleration / deceleration in accordance with the values ​​of the four parameters to be applied when an order is changed. According to the present invention configured as described above, since the target acceleration / deceleration is set using a matrix table created in advance, the processing required for setting the target acceleration / deceleration can be simplified. Specifically, when the target acceleration / deceleration is set using a matrix table, the control processing during order change is less complicated than when the target acceleration / deceleration is set by performing calculation processing, etc., so that the occurrence of operational delays can be suppressed.

[0016] In the present invention, the widthwise movement distance is preferably the widthwise movement distance of the slitter which has the greatest widthwise movement distance when an order is changed among the multiple slitters, and the widthwise movement distance of the scorer which has the greatest widthwise movement distance when an order is changed among the multiple scorers. According to the present invention configured as described above, by setting the target acceleration / deceleration based on the maximum widthwise movement distance of each of the multiple slitters and multiple scorers during an order change, a larger target acceleration / deceleration is set compared to when other non-maximum widthwise movement distances are used. Therefore, the widthwise movements required for the order change for all of the multiple slitters and the widthwise movements required for the order change for all of the multiple scorers can be reliably completed within the target setup time.

[0017] In the present invention, the widthwise movement distance is preferably the widthwise movement distance by which each of a plurality of slitters should be moved for an order change, and the widthwise movement distance by which each of a plurality of scorers should be moved for an order change. In the present invention configured in this way, the target acceleration / deceleration is set individually for each slitter based on the widthwise movement distance by which each of the slitters should be moved for the order change so that each slitter meets the target setup time, and the target acceleration / deceleration is set individually for each scorer based on the widthwise movement distance by which each of the scorers should be moved for the order change so that each scorer meets the target setup time. In this case, the target acceleration / deceleration applied to the cardboard sheet processing tool with a relatively short widthwise movement distance is smaller than when a common target acceleration / deceleration is set for multiple cardboard sheet processing tools. Therefore, the load on the movement mechanism of the cardboard sheet processing tool can be effectively reduced.

[0018] In the present invention, the vertical movement distance is preferably a distance according to the thickness of the thicker cardboard sheet between the cardboard sheets used before and after the order change. According to the present invention configured in this way, by setting the target acceleration / deceleration based on the vertical movement distance corresponding to the larger thickness of the cardboard sheets before and after the order change, a larger target acceleration / deceleration is set compared to when the vertical movement distance corresponding to the smaller thickness is used. Therefore, the vertical movement that should be performed at the time of the order change according to the thickness of the cardboard sheets of the old order and the new order can be reliably completed within the target setup time.

[0019] In the present invention, the control device is preferably configured to control the width-wise movement mechanism so that the width-wise movement speed of the cardboard sheet processing tool becomes maximum when the cardboard sheet processing tool reaches an intermediate position corresponding to half the width-wise movement distance that the cardboard sheet processing tool should be moved by due to an order change, and to control the vertical movement mechanism so that the vertical movement speed of the cardboard sheet processing tool becomes maximum when the cardboard sheet processing tool reaches an intermediate position corresponding to half the vertical movement distance that the cardboard sheet processing tool should be moved by due to an order change. According to the present invention configured as described above, the control device applies a speed profile for both the widthwise movement and the vertical movement of the corrugated sheet processing tool, in which the moving speed of the corrugated sheet processing tool is accelerated until it reaches the intermediate position of the distance to be moved, the moving speed is maximized when it reaches the intermediate position, and the moving speed is decelerated after it reaches the intermediate position. In this case, the magnitude of the acceleration / deceleration during the order change can be reduced compared to, for example, a speed profile in which the moving speed of the corrugated sheet processing tool is accelerated to reach the maximum speed just before the intermediate position, and then the maximum speed is maintained for a certain period of time before being decelerated. Therefore, according to the speed profile of the present invention, the load on the moving mechanism of the corrugated sheet processing tool can be effectively reduced compared to other speed profiles.

[0020] In the present invention, the control device is preferably configured to calculate a shortest defect dimension, which is the length that the cardboard sheet moves in the supply direction while the cardboard sheet processing tool is moving during an order change, when the cardboard sheet processing tool is moved in the width direction and up and down at the maximum acceleration and deceleration settable to the width direction movement mechanism and the up and down direction movement mechanism in order to change the position of the cardboard sheet processing tool for an order change, and if the shortest defect dimension is less than a predetermined cutting dimension, set a target acceleration and deceleration so that the movement of the cardboard sheet processing tool when making an order change is completed within the target setup time, and if the shortest defect dimension is equal to or greater than the predetermined cutting dimension, set the target acceleration and deceleration to the maximum acceleration and deceleration. According to the present invention configured in this way, it is possible to set an appropriate target acceleration / deceleration speed according to the relationship between the minimum defect size and the predetermined cutter cutting size. In particular, when the minimum defect size is equal to or larger than the cutter cutting size, the target acceleration / deceleration speed is set to the maximum acceleration / deceleration speed, so that the movement of the cardboard sheet processing tool when changing the order can be completed in the shortest setup time.

[0021] In the present invention, the control device is preferably configured to set the target acceleration and deceleration when the cardboard sheet processing tool moves in the width direction and the up and down direction to the same value so that the movement of the cardboard sheet processing tool for an order change is completed within the target setup time. According to the present invention configured in this manner, the target acceleration / deceleration for widthwise movement and the target acceleration / deceleration for vertical movement are set to the same value, thereby simplifying the processing required to set the target acceleration / deceleration.

[0022] In the present invention, the predetermined cutting dimension is preferably a preset fixed dimension. According to the present invention configured as described above, when an order is changed, the cutter device can appropriately cut out the defective sheets at a preset fixed size. The defective sheets cut out in this manner can be used as pads for stacked non-defective sheets, for example.

[0023] In the present invention, the predetermined cutting dimension is preferably a dimension (cutter cutting limit dimension) according to the minimum dimension along the feeding direction of the cardboard sheet that can be cut by the cutter device depending on the feeding speed. According to the present invention configured in this manner, when an order is changed, for example, if the shortest defective dimension is less than the cutter cutting limit dimension, the cutter device can appropriately cut off the defective sheet at the cutter cutting limit dimension that corresponds to the sheet supply speed.

[0024] In the present invention, the slitter-scorer device preferably further comprises a display unit for displaying the target acceleration / deceleration set by the control device. According to the present invention thus configured, the operator can check the target acceleration / deceleration displayed on the display unit. Effect of the Invention

[0025] According to the slitter-scorer device of the present invention, when an order is changed, it is possible to suppress the progression of deterioration over time of the moving mechanism of the cardboard sheet processing tool while ensuring the yield of the produced cardboard sheets. [Brief description of the drawings]

[0026] [Figure 1] 1 is a side view showing an entirety of a cardboard sheet production apparatus according to an embodiment of the present invention; [Diagram 2] 1 is a schematic side view showing a slitter-scorer apparatus according to an embodiment of the present invention. [Diagram 3] 1 is a schematic front view showing an entire slitter in a slitter-scorer device according to an embodiment of the present invention. [Figure 4] 1 is a schematic side view showing a slitter in a slitter-scorer apparatus according to an embodiment of the present invention. [Diagram 5] 1 is a schematic front view showing a slitter in a slitter-scorer device according to an embodiment of the present invention. [Figure 6] 1 is a diagram showing a state in which a slitter in a slitter-scorer device according to an embodiment of the present invention is in an intermediate position between a processing position and a non-processing position. [Figure 7] FIG. 2 is a diagram showing a state in which a slitter in a slitter-scorer device according to an embodiment of the present invention is in a non-processing position. [Figure 8] FIG. 2 is a schematic side view showing a scorer in a slitter-scorer apparatus according to an embodiment of the present invention. [Figure 9] FIG. 2 is a block diagram showing the electrical configuration of the slitter-scorer device according to the embodiment of the present invention. [Figure 10] FIG. 2 is an explanatory diagram of the basic concept of a control method according to an embodiment of the present invention. [Figure 11]FIG. 4 is an illustration of a target setup time according to an embodiment of the present invention. [Figure 12] 1 shows a specific example of a matrix table according to an embodiment of the present invention. [Figure 13] 5 is a flowchart showing a process for setting a target acceleration / deceleration speed of a slitter according to an embodiment of the present invention. [Figure 14] 4 is a flowchart illustrating a slitter setup process according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, a slitter-scorer device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0028] <Configuration of corrugated cardboard sheet production equipment> First, the overall configuration of a cardboard sheet production apparatus to which a slitter-scorer device according to the present embodiment is applied will be described with reference to Fig. 1. Fig. 1 is a side view showing the entire cardboard sheet production apparatus according to the present embodiment.

[0029] As shown in FIG. 1, a corrugated cardboard sheet production device (corrugator) 501 includes a single facer 508 that produces a single-sided cardboard sheet 506 by bonding a core 502 and a liner 504 together, in which corrugations having a predetermined corrugation pitch are formed, a double facer 512 that produces a double-sided cardboard sheet 510 by bonding another liner 507 to the single-sided cardboard sheet 506, a slitter scorer device 100 that includes a scorer 52 and a slitter 1 (which correspond to the cardboard sheet processing tool 100a in the present invention) that respectively perform a process of adding lines and a process of adding cuts (slitting) to the double-sided cardboard sheet 510 along the supply direction FW (i.e., along a direction perpendicular to the corrugations), a cutter device 520 that cuts the double-sided cardboard sheet 510 to a predetermined cutting dimension in the sheet supply direction FW, and a stacker device 522 that stacks each of the cut double-sided cardboard sheets vertically. In the following description, the double-sided corrugated cardboard sheet 510 will also be referred to simply as "corrugated cardboard sheet S."

[0030] <Configuration of the slitter scorer device> Next, the slitter-scorer device 100 according to this embodiment will be described with reference to Fig. 2 to Fig. 8. Fig. 2 is a schematic side view showing the slitter-scorer device 100 according to this embodiment, Fig. 3 is a schematic front view showing the entire slitter 1 according to this embodiment, Fig. 4 is a schematic side view showing the slitter 1 according to this embodiment, Fig. 5 is a schematic front view showing the slitter 1 according to this embodiment, Fig. 6 is a view (similar to Fig. 4) showing the slitter 1 according to this embodiment in a state intermediate between the processing position and the non-processing position, Fig. 7 is a view (similar to Fig. 4) showing the slitter 1 according to this embodiment in a state in the non-processing position, and Fig. 8 is a schematic side view showing the scorer 52 according to this embodiment.

[0031] As shown in FIG. 2, the slitter-scorer device 100 includes two scorers 52 on the upstream side of the supply direction FW (supply line) of the cardboard sheet S, and one slitter 1 on the downstream side. As shown in FIG. 3, the slitter 1 has three slitters 1a, 1b, and 1c in the width direction, i.e., in the direction approximately perpendicular to the sheet supply direction FW. Similarly, each scorer 52 has three scorers 52a, 52b, and 52c in the width direction. As will be described later, each of the slitters 1a, 1b, and 1c and the scorers 52a, 52b, and 52c is arranged to be movable in the width direction independently of each other, and is configured to be positioned and adjusted in the width direction according to changes in the number of sheets and the sheet width due to order changes. Note that the present invention is not limited to the application of three slitters 1 and scorers 52, and in other examples, less than three slitters 1 and scorers 52, or four or more slitters 1 and scorers 52 may be applied.

[0032] Explaining the slitter 1, as shown in Fig. 4, the slitter 1 has an upper slitter 2 located above the paper line along which the cardboard sheet S runs, and a lower slitter 11 located below the paper line. The slitter 1 is a so-called lower single blade type slitter, having a slitter knife 22 below the paper line and a slitter receiving member 10 above the slitter knife 22 for receiving the slitter knife 22. Note that in other examples, a slitter of the type in which both the upper and lower slitters have slitter knives may be applied, or a type in which one of the slitters has a slitter knife and the other has a slitter receiving member may be applied.

[0033] As shown in Figures 4 and 5, in the lower slitter 11, the lower slitter frame 13 is attached to the guide rails 15a, 15b of the stay 12 mounted on a frame (not shown) via the support parts 14a, 14b. The lower slitter 11 is also configured to be positionable in the width direction corresponding to each production order by a width direction movement mechanism that is attached to the lower slitter frame 13 and has a bearing part 16a that screws with a screw shaft 17a mounted between the frames. As shown in Figure 5 in particular, in this width direction movement mechanism, the screw shaft 17a rotated by a width direction movement servo motor 40 as a drive device attached to the frame of the slitter 1 via a bracket 39 is screwed with the bearing part 16a provided on the lower slitter frame 13 of the lower slitter 11, and when the screw shaft 17a is rotated by starting the width direction movement servo motor 40, the lower slitter 11 moves in the width direction on the rotating screw shaft 17a via the bearing part 16a fixed to the lower slitter frame 13.

[0034] In addition, symbols 17b and 17c in the figure denote screw shafts for moving and positioning the other two slitters 1b, 1c arranged side by side in the width direction, and each lower slitter moves in the width direction on the screw shafts 17b, 17c via bearing portions 16b, 16c.

[0035] A slitter knife 22 is attached to the lower slitter frame 13, and a vertical movement mechanism configured to move the slitter knife 22 in the vertical direction between a processing position where the cardboard sheet S is cut and a non-processing position where the cardboard sheet S is not cut is provided. Specifically, the vertical movement mechanism has a link mechanism 18 including a first arm 19 fixed to the lower slitter frame 13, a second arm 20 rotatably connected to the first arm 19 via a fulcrum portion 23 located on the slitter knife rotation drive shaft and rotatably connected to the slitter knife 22 via a rotation support portion 21, and a connecting arm 24 connected to the second arm 20 via a first fulcrum portion 25 and connected to a rotation mechanism 27 via a second fulcrum portion 26. The rotation mechanism 27 has a servomotor 29 for vertical movement as a drive device, a screw shaft 30 connected to the servomotor 29 for vertical movement, a sliding member 32 that screws into the screw shaft 30 and can slide along the slide rail 28 on the screw shaft 30, a screw shaft fixing base 31 that is located opposite the servomotor 29 for vertical movement and rotatably supports the screw shaft 30, and a connecting body 33 that is attached to the sliding member 32 and connected to the connecting arm 24 via the second fulcrum portion 26.

[0036] In this way, in the vertical movement mechanism, the screw shaft 30 is rotated by the vertical movement servo motor 29 of the rotating mechanism 27, and the sliding member 32 screwed with the screw shaft 30 slides on the slide rail 28, and the connecting arm 24 attached to the sliding member 32 via the connector 33 follows. As a result, the first fulcrum portion 25 where the second arm 20 and the connecting arm 24 engage rotates in accordance with the movement of the connecting arm 24, with the fulcrum portion 23 of the first arm 19 and the second arm 20 as the fulcrum.

[0037] More specifically, in FIG. 4, the slitter knife 22 is positioned at the processing position (cutting position), and the slitter knife 22 and the slitter receiving member 10 engage (Tx), thereby cutting the cardboard sheet S. In contrast, in FIG. 6, the vertical movement servo motor 29 moves the sliding member 32 toward the vertical movement servo motor 29 (to the right in the drawing), and the second arm 20 rotates through the connecting arm 24 accordingly, and a relatively small gap Ty is formed between the slitter knife 22 and the slitter receiving member 10. At this time, the slitter knife 22 rotates to a position where it does not interfere with the cardboard sheet S, and does not cut the cardboard sheet S. Furthermore, as shown in FIG. 7, the sliding member 32 moves to the maximum toward the vertical movement servo motor 29 (to the right in the drawing), and a gap Tz of a size is formed between the slitter knife 22 and the slitter receiving member 10. This position may be used as a non-processing position of the slitter knife 22. In this way, as the second arm 20 rotates by the vertical movement mechanism, the slitter knife 22 provided on the second arm 20 can be moved back and forth in the vertical direction between a processing position where the cardboard sheet S is cut and a non-processing position where the cardboard sheet S is not cut.

[0038] 5, the rotation drive mechanism of the slitter knife 22 includes a slitter knife rotation drive device (not shown) attached to a frame or the like, a drive shaft 41 rotatably connected to the slitter knife rotation drive device and extending substantially parallel to the screw shaft 17a, a first drive transmission member 37 fixed to the drive shaft 41 via a first drive transmission member holder 35, and a second drive transmission member 38 fixed to the intermediate shaft 34 via a second drive transmission member holder 36 and engaged with the first drive transmission member 37 to transmit a rotational drive force. A first arm 19 and a second arm 20 are rotatably supported on the drive shaft 41 by bearings or the like to form a fulcrum portion 23. The slitter knife 22 is configured to rotate by transmitting the rotational driving force from the slitter knife drive device via the drive shaft 41 through the first drive transmission member 37 and the second drive transmission member 38, and when the lower slitter 11 moves in the width direction along the screw shaft 17 as described above, the first drive transmission member holder 35 slides on the drive shaft 41 in the same direction. The rotational peripheral speed of the slitter knife 22 is generally a little faster than the feed speed of the cardboard sheet S, and may be twice or more faster than the feed speed of the cardboard sheet S depending on the production conditions. The rotational driving mechanism of the slitter knife 22 uses an existing transmission mechanism, and as long as it applies a rotational force to the slitter knife 22, the slitter knife 22 may be directly rotated by, for example, directly mounting a rotational driving device or the like on the axis of the rotation support part 21 of the slitter knife 22.

[0039] On the other hand, the upper slitter 2 is supported and moves in the width direction in the same manner as the lower slitter, except that, instead of a slitter knife, a slitter support member that does not move between the processing position and the non-processing position is provided.

[0040] As shown in Fig. 4, in the upper slitter 2, the upper slitter frame 4 is attached via supports 5a, 5b to guide rails 6a, 6b of a stay 3 mounted on a frame (not shown). The upper slitter 2 is attached to the upper slitter frame 4 and configured to be positionable to a position corresponding to each production order by a width direction movement mechanism having a bearing 7a that screws with a screw shaft 8a mounted between the frames. Note that reference numerals 8b and 8c in the figure denote screw shafts for moving and positioning the other slitters 1b, 1c arranged side by side in the width direction in the width direction, and each upper slitter moves in the width direction on the screw shafts 8b, 8c via the bearings 7b, 7c.

[0041] A slitter receiving member 10 that receives the slitter knives 22 is rotatably supported by a rotation support portion 9 on the upper slitter frame 4. Since the slitter receiving member 10 is a member that receives the slitter knives 22 in order to cut the cardboard sheet S, the vertical positioning position of the slitter receiving member 10 on the cardboard sheet S is preferably a position in contact with the upper surface of the cardboard sheet S. In this case, the slitter receiving member 10 may be a mechanism that actively rotates it using a rotation drive mechanism (not shown), or the outer peripheral surface of the slitter receiving member 10 may come into contact with the traveling cardboard sheet S and be rotated by the frictional force thereof, or the slitter knives 22 may come into contact with the slitter receiving member 10 and be rotated by the frictional force thereof. Furthermore, the slitter receiving member 10 may be a brush shaft rotatably supported by the upper slitter frame 4. In this case, brushes that receive the slitter knives 22 are embedded on the outer periphery of the brush shaft, and the brushes are arranged over the entire range in which the lower slitter 11 moves in the width direction between the frames, making it possible to omit the width direction movement mechanism. Also, instead of a brush, a urethane shaft with urethane wrapped around its outer circumference may be used. In this case, the urethane that receives the slitter knives 22 is wrapped around the outer circumference of the urethane shaft over the entire range in which the lower slitter 11 moves in the width direction between the frames, making it possible to omit the width direction movement mechanism.

[0042] Next, the scorer 52 is basically configured in the same way as the slitter 1 described above, and components corresponding to those of the slitter 1 are given similar numbers and detailed explanations are omitted. Below, the differences are explained with reference to Figure 8.

[0043] First, the scorer 52 is different in that, while the slitter 1 cuts the cardboard sheet S, the scorer 52 puts creases on the surface of the cardboard sheet, and therefore, as shown in Fig. 2, instead of the slitter knife 22 of the lower slitter 11 and the slitter receiving member 10 of the upper slitter 2, the lower scorer 77 is provided with a lower crease roll 86 and the upper scorer 53 is provided with an upper crease roll 65. Second, the slitter 1 is different in that, while a vertical movement mechanism is used to move the slitter knife 22 provided on the lower side in the vertical direction between a processing position and a non-processing position, the scorer 52 is different in that a vertical movement mechanism is used to move the upper crease roll 65 provided on the upper side in the vertical direction between a processing position where a crease is applied and a non-processing position where no crease is applied.

[0044] The upper scoring roll 65 is an active scoring roll, whereas the lower scoring roll 86 is a passive scoring roll. In this respect, since the lower scoring roll 86 receives the upper scoring roll 65, it is preferable that the lower scoring roll 86 is fixed at a position that holds the lower surface of the cardboard sheet S with respect to the paper line of the cardboard sheet S. Also, the lower scorer 77 does not need to have a rotating mechanism for rotating the scoring roll, as in the above-mentioned upper scorer 53. However, for example, when a configuration in which the scoring roll provides scoring on both sides of the cardboard sheet S is preferable, a rotating mechanism for rotating the scoring roll may be provided in each of the upper and lower scorers 53 and 77 to provide scoring.

[0045] <Electrical configuration of the slitter scorer device> Next, the electrical configuration of the slitter-scorer device 100 according to this embodiment will be described with reference to Fig. 9. As shown in Fig. 9, the slitter-scorer device 100 incorporates a control device 102, to which vertical movement servomotors 29a, 29b, 29c and width direction movement servomotors 40a, 40b, 40c provided for each slitter 1a, 1b, 1c are connected via vertical direction servo drive units 104a, 104b, 104c and width direction servo drive units 106a, 106b, 106c, respectively. Position detection means 108 provided on each of the vertical movement and width direction movement servomotors 29, 40 are connected to the corresponding servo drive units.

[0046] Also connected to the control device 102 are a general-purpose operation unit 110 such as a keyboard or touch panel arranged on an operation panel (not shown) of the slitter-scorer device 100, and a host production control device 112 that controls the entire corrugator line of the cardboard sheet production device 501. The host production control device 112 controls the above-mentioned single facer 508, double facer 512, cutter device 520, stacker device 522, etc. in addition to the slitter-scorer device 100 (see FIG. 1). Also connected to the host production control device 112 is a rotation pulse generator 114 that detects the supply speed (sheet supply speed) of the cardboard sheet S. This rotation pulse generator 114 is provided, for example, near the drive motor of the double facer 512.

[0047] Although not shown, the width direction movement servomotor and the vertical direction movement servomotor provided in each scorer 52a, 52b, 52c are also connected to the control device 102 via the corresponding servo drive unit. The width direction movement servomotor 40 and the width direction servo drive unit 106 for the slitter 1, and the width direction movement servomotor and the width direction servo drive unit for the scorer 52 constitute the "width direction movement mechanism" in the present invention (the width direction movement mechanism also includes mechanisms such as the screw shaft and the bearing part described above). The vertical direction movement servomotor 29 and the vertical direction servo drive unit 104 for the slitter 1, and the vertical direction movement servomotor and the vertical direction servo drive unit for the scorer 52 constitute the "vertical direction movement mechanism" in the present invention (the vertical direction movement mechanism also includes mechanisms such as the arm, the link mechanism, the screw shaft, the sliding member, the connecting body, and the like described above).

[0048] The general-purpose operation unit 110 inputs data such as the processing positions (cutting positions) of the slitters 1 and the processing positions (scoring positions) of the scorers 52 corresponding to each order in advance, and the upper production control device 112 also issues similar commands and provides a sheet supply speed. When an order change occurs in the cutting dimensions of the cardboard sheets S, the order change timing, speed command, position command, etc., which are set based on the sheet supply speed input from the upper production control device 112, are processed as calculation data via the control device 102 of the slitter-scorer device 100. As a result, the control device 102 drives and controls the servo motors via the servo drive units, that is, the width direction movement mechanisms and vertical direction movement mechanisms of the slitter 1 and the scorers 52 are controlled, and each slitter 1 and each scorer 52 is moved from the processing positions of the old order to the processing positions of the new order.

[0049] In this embodiment, the upper production management device 112 has a memory unit (not shown), in which processing position data, non-processing position data, and moving position data for the slitter-scorer device 100, as well as cutter cutting dimension data for the cutter device 520 are pre-stored.

[0050] First, the processing position data is data indicating the positions (processing positions) at which the slitter 1 and scorer 52 used for processing in each order should be placed. This processing position data consists of vertical position data and width direction position data. Hereinafter, the processing position in the vertical direction indicated by the vertical position data will be appropriately referred to as the "vertical processing position," and the processing position in the width direction indicated by the width direction position data will be appropriately referred to as the "width direction processing position."

[0051] Next, the non-processing position data is data indicating the positions (non-processing positions) where the slitter 1 and scorer 52 not used for processing in each order should be located. This non-processing position data consists of vertical position data and width direction position data. Hereinafter, the non-processing position in the vertical direction indicated by the vertical position data will be appropriately referred to as the "vertical non-processing position", and the non-processing position in the width direction indicated by the width direction position data will be appropriately referred to as the "width direction non-processing position". Note that the non-processing position data does not have to include data indicating the vertical non-processing position.

[0052] Next, the in-motion position data is data indicating the vertical position (in-motion position) to be set while the slitter 1 and scorer 52 are each moving in the width direction substantially parallel to the surface of the cardboard sheet S due to an order change (i.e., during the order change). Therefore, this in-motion position data is made up of vertical position data. Specifically, the in-motion position is a vertical position at which the slitter 1 and scorer 52 do not process the cardboard sheet S during the order change. Typically, a vertical position according to the thickness (flute) of the cardboard sheet S to be produced is applied to the in-motion position.

[0053] Next, the cutter cutting dimension data is data related to the dimension (cutter cutting dimension) along the feed direction FW of the cardboard sheet S (defective sheet) cut by the cutter device 520 to remove defective parts of the cardboard sheet S that occur when the order is changed. Note that this cutter cutting dimension data is not necessarily data indicating the cutter cutting dimension itself. Specifically, the cutter cutting dimension data is stored as either a fixed dimension set in advance or a limit value (cutter cutting limit dimension) of the dimension of the cardboard sheet S that can be cut by the cutter device 520 according to the performance of the cutter device 520. For example, a worker (operator) operates the general-purpose operation unit 110 to set the cutter cutting dimension data to apply either the fixed dimension or the cutter cutting limit dimension.

[0054] Specifically, when the cardboard sheet S including the defective portion (defective sheet) is cut by the cutter device 520 at a fixed length that does not depend on the dimension of the defective portion (defective dimension), the fixed dimension is applied as the cutter cutting dimension data. In this case, the fixed dimension is set as the cutter cutting dimension, so the cutter cutting dimension data becomes data that indicates the cutter cutting dimension. For example, the defective sheet thus cut by the cutter device 520 at the fixed dimension is used as an underlay for non-defective sheets stacked in the stacker device 522. In this example, the fixed dimension is determined based on the dimension required for the underlay, etc.

[0055] On the other hand, when the cutter device 520 cuts out the defective sheet according to the defective dimension (in a typical example, the shortest defective dimension when the cardboard sheet processing tool 100a is moved at the maximum acceleration / deceleration speed during an order change), in other words, when the cutter cutting dimension is adjusted according to the defective dimension, the cutter cutting limit dimension is applied as the cutter cutting dimension data. In this case, when the cutter cutting limit dimension is less than the defective dimension, the defective dimension is set as the cutter cutting dimension, and the cutter device 520 cuts the cardboard sheet S at the defective dimension (the cutter cutting dimension may be set to a dimension obtained by adding a predetermined margin to the defective dimension, and the cardboard sheet S may be cut). On the other hand, when the cutter cutting limit dimension is equal to or greater than the defective dimension, the cutter device 520 cannot cut the cardboard sheet S at the defective dimension, so the cutter cutting limit dimension is set as the cutter cutting dimension, and the cardboard sheet S is cut at the cutter cutting limit dimension (the cutter cutting dimension may be set to a dimension obtained by adding a predetermined margin to the cutter cutting dimension, and the cardboard sheet S may be cut). In the former case, the defective dimension is set to the cutter cutting dimension, so the cutter cutting dimension data (to which the cutter cutting limit dimension is applied) does not become data indicating the cutter cutting dimension, and in the latter case, the cutter cutting limit dimension is set to the cutter cutting dimension, so the cutter cutting dimension data becomes data indicating the cutter cutting dimension.

[0056] Here, the cutter cutting limit dimension is a value according to the sheet supply speed, specifically, the faster the sheet supply speed is, the longer the cutter cutting limit dimension becomes. It is preferable to obtain cutter cutting limit dimensions according to various sheet supply speeds in advance, and store a correspondence table between the sheet supply speed and the cutter cutting limit dimension in the storage unit of the upper production management device 112 according to the results.

[0057] Furthermore, in this embodiment, the control device 102 of the slitter-scorer device 100 has a storage unit (not shown), which stores a matrix table that specifies the target acceleration and deceleration when the slitter 1 and scorer 52 (corrugated sheet processing tool 100a) move during an order change. Although details will be described later, this matrix table corresponds to four parameters, namely, the cutter cutting dimension, the sheet supply speed, the width direction movement distance and the vertical direction movement distance to move the corrugated sheet processing tool 100a for an order change, and the target acceleration and deceleration to be applied according to these four parameters, so that the movement of the corrugated sheet processing tool 100a for an order change is completed within the target setup time. Such a matrix table may be displayed on a display unit such as a touch panel of the general-purpose operation unit 110. This allows the operator to check the target acceleration and deceleration displayed on the touch panel when inspecting the machine. As a result, the worker can understand that since the target acceleration / deceleration is set to a relatively small value, the effect of appropriately suppressing the progression of future deterioration of the moving mechanism of the cardboard sheet processing tool 100a over time will be achieved.

[0058] <Control method> Next, in an embodiment of the present invention, a control method performed by the control device 102 of the slitter-scorer device 100 to move the slitter 1 and scorer 52 (cardboard sheet processing tool 100a) in the width direction and up / down direction when an order is changed, i.e., the control method performed on the width direction movement mechanism and up / down direction movement mechanism (hereinafter, when there is no need to distinguish between the two, they will simply be referred to as "moving mechanisms").

[0059] The basic concept of the control method according to this embodiment will be described with reference to Fig. 10. Figs. 10(A) and (B) show top views of the cardboard sheet S after passing through the slitter-scorer device 100 and the cutter device 520, and in particular show the state of the cardboard sheet S when an order is changed. Fig. 10(A) is an explanatory diagram of the control method according to a comparative example, and Fig. 10(B) is an explanatory diagram of the control method according to this embodiment. Here, an example is taken of a case where a cardboard sheet S (defective sheet) including a defective part of the cardboard sheet S that occurs when an order is changed is cut by the cutter device 520 at a fixed dimension that does not depend on the dimension of the defective part (defective dimension) (i.e., a fixed dimension is applied to the cutter cutting dimension).

[0060] As shown in Fig. 10(A), in the control method according to the comparative example, the corrugated cardboard sheet processing tool 100a is moved at the maximum acceleration / deceleration of the width direction movement mechanism and the vertical direction movement mechanism (specifically, the maximum acceleration / deceleration determined by the performance of the servo motor of the movement mechanism) when the order is changed, thereby minimizing the setup time and the defect dimension. Hereinafter, the setup time and the defect dimension that are shortest by moving the corrugated cardboard sheet processing tool 100a at the maximum acceleration / deceleration are called the "shortest setup time" and the "shortest defect dimension", respectively. In the example shown in Fig. 10(A), the shortest defect dimension is considerably shorter than the cutter cutting dimension as a fixed dimension.

[0061] As in the comparative example, when the corrugated cardboard sheet processing tool 100a is moved at the maximum acceleration / deceleration speed, the defective dimension is minimized. However, since a fixed dimension, not a defective dimension, is applied to the cutter cutting dimension, moving the corrugated cardboard sheet processing tool 100a at the maximum acceleration / deceleration speed to minimize the defective dimension does not lead to any improvement in the yield of the corrugated cardboard sheet. This is because the cutter device 520 cuts the corrugated cardboard sheet S at a fixed dimension regardless of the defective dimension (shortest defective dimension), so the defective sheet cut by the cutter device 520 is not minimized. Even in such a case that does not lead to an improvement in the yield, moving the corrugated cardboard sheet processing tool 100a at the maximum acceleration / deceleration speed puts an unnecessary burden on the moving mechanism of the corrugated cardboard sheet processing tool 100a. As a result, the aging deterioration (wear of the ball screw, etc.) of the moving mechanism of the corrugated cardboard sheet processing tool 100a will progress quickly.

[0062] In contrast, in this embodiment, as shown in Fig. 10(B), the control device 102 of the slitter scorer device 100 does not aim to minimize the setup time and minimize the defective dimension as in the comparative example, that is, does not move the cardboard sheet processing tool 100a at the maximum acceleration / deceleration speed to minimize the defective dimension, but moves the cardboard sheet processing tool 100a at an acceleration / deceleration speed that results in a defective dimension according to the cutter cutting dimension (fixed dimension). That is, in this embodiment, the control device 102 moves the cardboard sheet processing tool 100a at an acceleration / deceleration speed that can realize the period during which the part of the cardboard sheet S corresponding to the cutter cutting dimension, more specifically, the part obtained by subtracting a predetermined margin (the front end and the part at the back of the part that becomes the defective sheet) from the cutter cutting dimension, is substantially passing through the slitter scorer device 100, so that the period during which the cardboard sheet processing tool 100a is moving for the order change coincides with the period during which the cardboard sheet processing tool 100a is moving.

[0063] Specifically, in this embodiment, the control device 102 sets a target setup time for moving the corrugated sheet processing tool 100a in the width direction and the up-down direction for the order change based on the cutter cutting dimension and the sheet supply speed. In this case, the control device 102 sets the time required for the portion of the corrugated sheet S corresponding to the cutter cutting dimension, i.e., the portion obtained by subtracting a predetermined allowance from the cutter cutting dimension, to substantially pass through the slitter-scorer device 100 as the target setup time. More specifically, the control device 102 sets the time obtained by dividing the dimension obtained by subtracting the predetermined allowance from the cutter cutting dimension (hereinafter referred to as the "setup completion dimension" as appropriate) by the sheet supply speed detected by the rotation pulse generator 114 as the target setup time. Then, the control device 102 sets a target acceleration / deceleration so that the movement of the corrugated sheet processing tool 100a for the order change is completed within this target setup time, and controls the width direction movement mechanism and the up-down direction movement mechanism so that the corrugated sheet processing tool 100a moves at this target acceleration / deceleration when the order is changed.

[0064] Next, the target setup time according to this embodiment will be described with reference to FIG. 11. FIGS. 11(A) and (B) show the vertical and widthwise moving speeds of the slitter 1 when an order is changed. Similarly to FIGS. 10(A) and (B), FIGS. 11(A) and (B) show a control method according to a comparative example and a control method according to this embodiment, respectively. Here, when an order is changed, the slitter 1 is first moved downward (downward to the moving position), then moved widthwise (widthwise to the widthwise position for the new order), and then moved upward (upward from the moving position). Also, the slitter 1 performs uniform acceleration and uniform deceleration during the movement, and the magnitudes (absolute values) of the acceleration and deceleration of the slitter 1 at this time are the same. Although FIG. 11 shows the moving speed of the slitter 1, the moving speed of the scorer 52 is the same, so its description will be omitted.

[0065] As shown in Fig. 11(A), in the comparative example, the setup time is minimized by moving the slitter 1 at the maximum acceleration / deceleration when changing the order, i.e., the shortest setup time is realized. In contrast, as shown in Fig. 11(B), in this embodiment, the controller 102 sets a target setup time (>shortest setup time) according to the cutter cutting dimensions, etc., and moves the slitter 1 at a target acceleration / deceleration (<maximum acceleration / deceleration) according to the target setup time so that the movement of the slitter 1 for the order change is completed within this target setup time.

[0066] In this manner, in this embodiment, unlike the comparative example, the defective dimension is not minimized regardless of the cutter cutting dimension, that is, the corrugated sheet processing tool 100a is not uniformly moved at the maximum acceleration / deceleration to minimize the defective dimension, but is moved at an acceleration / deceleration speed smaller than that of the comparative example so that the defective dimension corresponds to the cutter cutting dimension. As a result, according to this embodiment, the load on the moving mechanism of the corrugated sheet processing tool 100a is reduced, and the progress of aging deterioration of the moving mechanism (such as wear of the ball screw (screw shaft and bearing part)) can be appropriately suppressed.

[0067] On the other hand, in this embodiment, the cutter device 520 cuts the cardboard sheet S with the same cutter cutting dimensions (fixed dimensions) as in the comparative example when the order is changed, so the dimensions of the generated defective sheets are the same as in the comparative example. Therefore, according to this embodiment, the yield of the produced cardboard sheets can be appropriately ensured.

[0068] Here, in this embodiment, as described above, the control device 102 sets the target acceleration / deceleration to be applied when changing the order by referring to the matrix table stored in advance in the storage unit. In this matrix table, four parameters, namely, the cutter cutting dimension, the sheet supply speed, the width direction movement distance and the vertical direction movement distance to move the cardboard sheet processing tool 100a for the order change, are associated with the target acceleration / deceleration to be applied according to these four parameters so that the movement of the cardboard sheet processing tool 100a for the order change is completed within the target setup time. The method of creating this matrix table will be described below. Here, the method of creating the matrix table will be described by taking the slitter 1 as an example of the cardboard sheet processing tool 100a. Note that the matrix table of the scorer 52 is also created in a similar manner, so its description will be omitted.

[0069] First, the sheet feeding speed is V L (m / s), the cutter cutting dimension is L (m), and the allowance is d (m), the above setup completion dimension is "L-2d" (see Figure 10(B)). Therefore, the target setup time T t This target setup time T t corresponds to the time required for the portion of the cardboard sheet S corresponding to the setup completion dimension (i.e., the portion obtained by excluding the front and rear margins from the cutter cutting dimension) to substantially pass through the slitter-scorer device 100. T t =(L-2d) / V L (1)

[0070] Next, as shown in Fig. 11(B), when changing the order, the slitter 1 is first moved downward, then moved widthwise, and then moved upward. In this case, if the time taken for the slitter 1 to move downward and upward is t1(s), and the time taken for the slitter 1 to move widthwise is t2(s) (see Fig. 11(B)), the actual setup time T r is expressed by equation (2). T r =2t1+t2(2)

[0071] In this embodiment, the actual setup time T r is the target setup time T t The condition that r =T t ), that is, the target acceleration / deceleration is set using the condition shown in equation (3). (L-2d) / V L =2t1+t2(3)

[0072] Next, consider the stage corresponding to the moving time t1 (s) for moving the slitter 1 downward, i.e., the stage for moving the slitter 1 from the vertical processing position to a moving position below the vertical processing position. In this embodiment, the control device 102 controls the vertical movement mechanism to accelerate and move the slitter 1 from the vertical processing position to an intermediate position between the vertical processing position and the moving position, and then decelerate and move the slitter 1 from the intermediate position to the moving position. In other words, the control device 102 controls the vertical movement mechanism so that the vertical movement speed of the slitter 1 becomes maximum when the slitter 1 reaches the intermediate position between the vertical processing position and the moving position. In this case, the acceleration from the vertical processing position to the intermediate position and the deceleration from the intermediate position to the moving position are set to the same absolute value α (m / s 2 ), the time it takes for the slitter 1 to reach the intermediate position from the vertical processing position is t1 / 2 (s), so the moving speed (maximum speed) V1 (m / s) of the slitter 1 when it reaches this intermediate position is expressed by equation (4). V1 = α × t1 / 2 (4)

[0073] On the other hand, if the distance from the vertical processing position to the moving position (i.e., the vertical movement distance by which the slitter 1 must be moved to change the order) is Y (m), then this vertical movement distance Y (m) is the area S1 of the triangle in FIG. 11(B), and is expressed by formula (5). Note that the vertical movement distance Y is a distance according to the thickness (flute) of the cardboard sheet S that is larger among the cardboard sheets S used before and after the order change. For example, the distance obtained by adding 3 to 5 mm to the larger thickness is applied to the vertical movement distance Y. Y = V1 × t1 / 2 (5)

[0074] By modifying this equation (5), the moving speed V1 (m / s) of the slitter 1 when the slitter 1 reaches the intermediate position is expressed by equation (6). V1 = 2Y / t1 (6)

[0075] By eliminating the moving speed V1 from the above equations (4) and (6), equation (7) is obtained. α×t1 / 2=2Y / t1(7)

[0076] By rearranging this equation (7), the downward movement time t1(s) of the slitter 1 is expressed by equation (8). The upward movement time t1(s) of the slitter 1 is also expressed similarly. t1=2√Y / √α (8)

[0077] Next, consider the stage corresponding to the movement time t2(s) for moving the slitter 1 in the width direction, i.e., the stage for moving the slitter 1 from the width direction position of the old order to the width direction position of the new order. In this embodiment, the control device 102 accelerates and moves the slitter 1 from the width direction position of the old order to an intermediate position between the width direction positions of the old order and the new order, and then controls the width direction movement mechanism to decelerate and move the slitter 1 from the intermediate position to the width direction position of the new order. In other words, the control device 102 controls the width direction movement mechanism so that the width direction movement speed of the slitter 1 becomes maximum when the slitter 1 reaches the intermediate position between the width direction positions of the old order and the new order. In this case, the acceleration from the width direction position of the old order to the intermediate position and the deceleration from the intermediate position to the width direction position of the new order are set to the same absolute value α (m / s 2 ) is set. Here, the acceleration / deceleration during widthwise movement and the acceleration / deceleration during vertical movement are set to the same value α. Also, the distance from the widthwise position of the old order to the widthwise position of the new order (i.e., the widthwise movement distance that the slitter 1 must be moved to change the order) is set to X (m). Then, using the same derivation procedure as for equation (8) above, the widthwise movement time t2 (s) of the slitter 1 can be expressed by equation (9). t2=2√X / √α (9)

[0078] It should be noted that the widthwise movement distance X is the widthwise movement distance of the slitter 1 that has the largest widthwise movement distance at the time of the order change among the multiple slitters 1.

[0079] Next, by substituting equations (8) and (9) into conditional equation (3), conditional equation (3) can be expressed as equation (10). (L-2d) / V L =2×2√Y / √α+2√X / √α =2(2√Y+√X) / √α (10)

[0080] Solving equation (10) for α, the widthwise and vertical movements of the slitter 1 for order changes are calculated as the target setup time T tThe target acceleration / deceleration α to be set in order to complete the cutting in the time is expressed by the formula (11). As shown in the formula (11), the target acceleration / deceleration α is determined by the cutter cutting dimension L, the sheet supply speed V L , is defined by the widthwise movement distance X and the vertical movement distance Y. α=4V L 2 (2√Y+√X) 2 / (L-2d) 2 (11)

[0081] In one example, the cutter cutting dimension L is 800 (mm) and the sheet feed speed V L If the speed is 200 (m / s), the margin d is 25 (mm), the widthwise movement distance X is 100 (mm), and the vertical movement distance Y is 16 (mm), then from equation (11), the target acceleration / deceleration speed α of the slitter 1 is 25.6 (m / s 2 ) is obtained. In this way, various cutter cutting dimensions L and sheet feeding speeds V L By determining the target acceleration / deceleration α for the combination of the width direction movement distance X and the vertical direction movement distance Y in advance, the cutter cutting dimension L and the sheet supply speed V L A matrix table is created that specifies the target acceleration / deceleration speed α of the slitter 1 to be set in accordance with the four parameters, namely, the widthwise movement distance X and the vertical movement distance Y. Note that a matrix table that specifies the target acceleration / deceleration speed α of the scorer 52 is also created in a similar procedure.

[0082] 12 shows a specific example of a matrix table according to this embodiment. This matrix table shows the sheet supply speed V when a predetermined vertical movement distance Y is applied to produce a corrugated cardboard sheet S with a cutter cutting dimension L of 800 (mm) and an AB corrugated cardboard sheet (thickness of 8 (mm)). L The target acceleration / deceleration speed α to be set according to the combination of the sheet supply speed V and the width direction movement distance X is specified. L When the moving distance X in the width direction is 0 to 25 mm, the target acceleration / deceleration α of the slitter 1 is 5.2 m / s. 2 )

[0083] In the matrix table of FIG. 12, a sheet feed speed V L The target acceleration / deceleration α to be set is specified for a combination of a plurality of ranges of the sheet feeding speed V and a plurality of ranges of the width-direction moving distance X having a certain width. L For example, the sheet supply speed V in the range of 176 to 200 (m / s) is set based on the upper limit (maximum value) that defines each range of the sheet feed speed V in the range of 176 to 200 (m / s) and the upper limit (maximum value) that defines each range of the width direction movement distance X. L and a width direction movement distance X in the range of 76 to 100 (mm), a sheet supply speed V of 200 (m / s) L Based on the width direction movement distance X of 100 (mm), the target acceleration / deceleration α to be set (25.6 (m / s 2 The reason for this is that the target acceleration / deceleration α is calculated based on the sheet supply speed V L The faster the sheet feed speed V is, and the longer the travel distances X and Y are, the larger the value becomes. Therefore, the slitter 1 needs to be moved quickly. Therefore, the condition where the sheet feed speed V is the fastest is the condition where the sheet feed speed V is the fastest. L This is because it is desirable to define the target acceleration / deceleration α based on the upper limit value (maximum value) that defines the range of the width direction movement distance X and the upper limit value (maximum value) that defines the range of the width direction movement distance X.

[0084] Note that the present invention is not limited to setting the target acceleration / deceleration α from a matrix table, and in another example, the target acceleration / deceleration α may be set by calculating formula (11) for each order change without using a matrix table. However, when the target acceleration / deceleration α is set from a matrix table, the control process at the time of an order change is not as complicated as when the target acceleration / deceleration α is set by calculating formula (11), and no delay in operation occurs. Therefore, it can be said that setting the target acceleration / deceleration α from a matrix table is more preferable than setting the target acceleration / deceleration α by calculating formula (11).

[0085] Next, the process of setting the target acceleration / deceleration of the slitter 1 according to this embodiment will be described with reference to Fig. 13. Fig. 13 is a flowchart showing the process of setting the target acceleration / deceleration of the slitter 1 according to this embodiment. This process of setting the target acceleration / deceleration is executed by the control device 102 of the slitter scorer device 100, and is executed during production of the old order before the order of the cardboard sheet S to be produced is changed. Note that, here, the process of setting the target acceleration / deceleration is explained using the slitter 1 as an example of the cardboard sheet processing tool 100a, but the process of setting the target acceleration / deceleration of the scorer 52 is also performed in a similar manner, so the explanation thereof will be omitted.

[0086] First, in step S11, the control device 102 acquires various information from the upper production management device 112. Specifically, the control device 102 acquires processing position data, non-processing position data, and moving position data related to the slitter-scorer device 100, cutter cutting dimension data related to the cutter device 520, and the sheet supply speed V detected by the rotation pulse generator 114. L And at least get.

[0087] Next, in step S12, the control device 102 selects a slitter 1 to be used for the new order from among the multiple slitters 1. Specifically, the control device 102 selects the slitter 1 to be used for the new order based on the processing position data of the old order and the processing position data of the new order, such that the movement distance (particularly the movement distance in the width direction) from the position of the old order to the processing position of the new order on the slitter 1 is the shortest.

[0088] Next, in step S13, the control device 102 obtains the vertical movement distance Y and the width direction movement distance X of the slitter 1 to be used in subsequent settings, etc. That is, the control device 102 obtains the vertical movement distance Y and the width direction movement distance X to which the slitter 1 should be moved for the order change. Specifically, the control device 102 applies the distance from the vertical processing position to the moving position as the vertical movement distance Y. Typically, the control device 102 applies a distance according to the thickness of the cardboard sheet S that has a larger thickness (flute) among the cardboard sheets S used before and after the order change as the vertical movement distance Y. In addition, the control device 102 obtains the distance from the width direction position of the old order to the width direction position of the new order for the multiple slitters 1, and applies the maximum distance among the distances obtained for the multiple slitters 1 as the width direction movement distance X.

[0089] Next, in step S14, the control device 102 controls the slitter 1 to rotate at the maximum acceleration / deceleration speed α max In step S13, the setup time (shortest setup time T min ) is calculated. Here, the acceleration / deceleration when the slitter 1 moves vertically for an order change is the same as the acceleration / deceleration when it moves widthwise for an order change. In this case, the shortest setup time T min is expressed by equation (12) based on the above equations (2), (8), and (9). T min =2(2√Y+√X) / √α max (12)

[0090] Next, in step S15, the control device 102 calculates the shortest setup time T min For sheet feed speed V L By multiplying by α, slitter 1 has the maximum acceleration / deceleration speed for order changes. max The dimension of the defective part (shortest defective dimension) that occurs when the part is moved in this manner is calculated.

[0091] Next, in step S16, the control device 102 compares the shortest defect dimension obtained in step S15 with the dimension (cutter cutting dimension) of the cardboard sheet S (defective sheet) to be cut by the cutter device 520 in order to remove the defective portion of the cardboard sheet S that occurred when the order was changed. In this case, the control device 102 applies a fixed dimension set in advance to the cutter cutting dimension. Specifically, the control device 102 uses the dimension of one defective sheet, which is set in advance and is to be cut by the cutter device 520, as the fixed dimension. In particular, in step S16, the control device 102 determines whether the shortest defect dimension is less than the dimension of one fixed dimension. Note that the shortest defect dimension is usually set to fall within the dimension of one fixed dimension (the dimension of one defective sheet) or the dimension of two fixed dimensions (the dimension of two defective sheets).

[0092] If it is determined in step S16 that the shortest defect dimension is less than the dimension of one fixed dimension (step S16: Yes), the control device 102 proceeds to step S17. In step S17, the control device 102 determines the target setup time T t (Fixed size cutter cutting dimension L for one sheet and current sheet feeding speed V L Specifically, the control device 102 refers to a matrix table stored in the storage unit, and sets the target acceleration / deceleration speed α of the slitter 1 so as to realize the cutter cutting dimension L for one fixed sheet, the sheet supply speed V obtained in step S11, L In step S13, the target acceleration / deceleration speed α to be applied according to the width direction movement distance X and the up / down direction movement distance Y are read out and the target acceleration / deceleration speed α is set. In this case, the cutter device 520 cuts out one defective sheet of a fixed size.

[0093] On the other hand, if the shortest defect dimension is equal to or greater than the dimension of one fixed dimension (step S16: No), the control device 102 proceeds to step S18. In step S18, the control device 102 calculates a target setup time T t(Cutting dimension L for two fixed dimensions and current sheet feeding speed V L Specifically, the control device 102 refers to a matrix table stored in the storage unit, and sets the target acceleration / deceleration speed α of the slitter 1 so as to realize the cutter cutting dimension L for two sheets of the fixed size, the sheet supply speed V obtained in step S11, and the sheet feeding speed V. L In step S13, the target acceleration / deceleration speed α to be applied according to the width direction movement distance X and the vertical direction movement distance Y are read out and the target acceleration / deceleration speed α is set. In this case, the cutter device 520 cuts out two defective sheets of a fixed size.

[0094] The target acceleration / deceleration α set as described above is applied to all of the multiple slitters 1 when the order is changed.

[0095] Here, in this embodiment, in steps S17 and S18, a uniform target acceleration / deceleration rate α is set according to the maximum widthwise movement distance X obtained in step S13, i.e., the maximum widthwise movement distance X among the widthwise movement distances obtained for the multiple slitters 1, and the set target acceleration / deceleration rate α is applied to all of the multiple slitters 1, but this is not limited to this. For example, in steps S17 and S18, a target acceleration / deceleration rate α may be set according to each of the multiple slitters 1's widthwise movement distances obtained in step S13, and the set target acceleration / deceleration rate α may be applied individually to each slitter 1. As a result, the target acceleration / deceleration rate α set for a slitter 1 with a short widthwise movement distance is reduced, so that the aging deterioration of the movement mechanism can be further suppressed.

[0096] Furthermore, when a similar target acceleration / deceleration setting process is performed for the scorer 52, the result of the judgment in step S16 may differ between the slitter 1 and the scorer 52. For example, the shortest defective dimension for the slitter 1 may be equal to or greater than the dimension of one fixed dimension (step S16: No to step S18), while the shortest defective dimension for the scorer 52 may be less than the dimension of one fixed dimension (step S16: Yes to step S17). This occurs when the width direction movement distance X applied in step S13 is significantly different between the slitter 1 and the scorer 52. In this case, the cutter device 520 cuts out defective sheets of two fixed dimensions. Therefore, for the scorer 52, the process may proceed from step S16 to step S18 (instead of step S17), and the target acceleration / deceleration α may be set based on the target setup time corresponding to two fixed dimensions (instead of one fixed dimension). This reduces the target acceleration / deceleration α set for the scorer 52, thereby further suppressing the progress of aging deterioration of the movement mechanism.

[0097] Next, the setup process of the slitter 1 according to this embodiment will be described with reference to Fig. 14. Fig. 14 is a flow chart showing the setup process of the slitter 1 according to this embodiment. This setup process is executed by the control device 102 of the slitter-scorer device 100 when an order is changed, particularly after the target acceleration / deceleration setting process of Fig. 13. For example, the setup process is started when a request for an order change is input from the upper production management device 112 to the control device 102 of the slitter-scorer device 100. Note that, here, the setup process will be described using the slitter 1 as an example of the cardboard sheet processing tool 100a, but the scorer 52 also undergoes the setup process in a similar manner, and therefore the description thereof will be omitted.

[0098] First, in step S21, the control device 102 controls the vertical movement mechanism to move each slitter 1 vertically to the moving position at the target acceleration / deceleration speed α set in the process of FIG. 13. Specifically, the control device 102 moves the slitter 1 used for processing in the old order downward, that is, moves it downward from the vertical processing position of the old order to the moving position, and moves the slitter 1 not used for processing in the old order upward, that is, moves it upward from the vertical non-processing position of the old order to the moving position, thereby moving all the slitters 1 to the moving position. This is because the moving position is lower than the vertical processing position and higher than the vertical non-processing position. In this case, the control device 102 controls the vertical movement servo motor 29 via the vertical servo drive unit 104 to move each slitter 1 vertically to the moving position. In addition, as described above, it is not limited to moving the slitter 1 that was not used for processing in the old order upward from the vertical non-processing position to the moving position, and the slitter 1 that was not used for processing in the old order may be maintained in the vertical non-processing position without being moved.

[0099] Next, in step S22, the control device 102 controls the width direction movement mechanism to move each slitter 1 in the width direction from the width direction position of the old order to the width direction position of the new order at the target acceleration / deceleration speed α set in the process of Fig. 13. Specifically, the control device 102 moves the slitter 1 used for processing in the new order from its current width direction position to the width direction processing position of the new order, and moves the slitter 1 not used for processing in the new order from its current width direction position to the width direction non-processing position of the new order. In this case, the control device 102 controls the width direction movement servo motor 40 via the width direction servo drive unit 106 to move each slitter 1 in the width direction approximately parallel to the surface of the cardboard sheet S.

[0100] Next, in step S23, the control device 102 controls the vertical movement mechanism to move each slitter 1 vertically from the moving position to the vertical processing position or vertical non-processing position of the new order at the target acceleration / deceleration speed α set in the process of Fig. 13. Specifically, the control device 102 moves the slitter 1 used for processing the new order upward from the moving position to the vertical processing position of the new order, and moves the slitter 1 not used for processing the new order downward from the moving position to the vertical non-processing position. In this case, the control device 102 controls the vertical movement servo motor 29 via the vertical servo drive unit 104 to move each slitter 1 vertically. In addition, in the above step S21, if the slitter 1 that was not used for processing the old order is maintained in the vertical non-processing position, when the slitter 1 thus maintained in the vertical non-processing position is used for processing the new order, this slitter 1 can be moved upward from the vertical non-processing position to the vertical processing position of the new order. On the other hand, the slitter 1 that is not used for processing either the old order or the new order can be continued to be maintained in the vertical non-processing position.

[0101] Next, in step S24, since the setup of each slitter 1 has been completed, the controller 102 performs control so that the slitter 1 starts processing a new order.

[0102] <Action and Effects> Next, the operation and effects of the slitter-scorer device 100 according to the present embodiment will be described.

[0103] According to this embodiment, the control device 102 of the slitter scorer device 100 determines the target setup time for moving the cardboard sheet processing tool 100a in the width direction and the up-down direction in order to change the position of the cardboard sheet processing tool 100a for an order change based on the cutter cutting dimension L along the supply direction FW of the cardboard sheet S cut by the cutter device 520 at the time of the order change and the sheet supply speed V LA target acceleration / deceleration α for when the cardboard sheet processing tool 100a moves during an order change is set so that the movement of the cardboard sheet processing tool 100a for an order change is completed within the target setup time, and the widthwise movement mechanism and the vertical movement mechanism are controlled so that the cardboard sheet processing tool 100a moves at the target acceleration / deceleration α during the order change.

[0104] Thus, in this embodiment, unlike the comparative example in which the target acceleration / deceleration is set from the viewpoint of shortening the setup time, that is, the comparative example in which a relatively large target acceleration / deceleration (typically the maximum target acceleration / deceleration determined by the performance of the moving mechanism) is set in order to shorten the setup time, the control device 102 sets the cutter cutting dimension L and the current sheet supply speed V L Therefore, according to the present embodiment, a large target acceleration / deceleration is not set uniformly as in the comparative example, but the target acceleration / deceleration is set according to the cutter cutting dimension L and the sheet supply speed V L An appropriate target acceleration / deceleration α (which basically tends to be smaller than that in the comparative example) is set in accordance with the above.

[0105] As a result, according to this embodiment, when an order is changed, the load on the moving mechanism of the cardboard sheet processing tool 100a is reduced, and the progress of deterioration over time (such as wear of the ball screw) of the moving mechanism can be appropriately suppressed. On the other hand, in this embodiment and the comparative example, the cutter device 520 cuts the cardboard sheet S with the same cutter cutting dimension L when an order is changed, so the dimensions of the generated defective sheets are the same. Therefore, according to this embodiment, as in the comparative example, the yield of the produced cardboard sheets S can be appropriately ensured. As described above, according to this embodiment, when an order is changed, the progress of deterioration over time of the moving mechanism of the cardboard sheet processing tool 100a can be suppressed while ensuring the yield of the produced cardboard sheets S.

[0106] In addition, according to this embodiment, the control device 102 adjusts the cutter cutting dimension L and the sheet supply speed V so that the movement of the cardboard sheet processing tool for the order change is completed within the target setup time. L The target acceleration / deceleration speed α is set based on the width direction movement distance and the vertical direction movement distance that the corrugated sheet processing tool should be moved to change the order. L By setting the target acceleration / deceleration speed α based on the widthwise movement distance and the vertical movement distance, it is possible to set the target acceleration / deceleration speed α with high accuracy so as to accurately achieve the target setup time.

[0107] According to the present embodiment, the control device 102 controls the cutter cutting dimension L and the sheet supply speed V L The target acceleration / deceleration α corresponding to the values ​​of the four parameters to be applied when the order is changed is set by referring to a matrix table in which the four parameters, i.e., the width direction movement distance and the vertical direction movement distance, are previously associated with the target acceleration / deceleration α to be applied according to these four parameters. By setting the target acceleration / deceleration α using a matrix table created in advance in this manner, the processing required for setting the target acceleration / deceleration α can be simplified. Specifically, when the target acceleration / deceleration α is set using a matrix table, the control processing when the order is changed is not as complicated as when the target acceleration / deceleration α is set by performing calculation processing or the like, so that the occurrence of delays in operation can be suppressed.

[0108] Further, according to the present embodiment, the width direction movement distance for setting the target acceleration / deceleration speed α is the width direction movement distance of the slitter 1 that has the largest width direction movement distance among the multiple slitters 1 when changing the order, and the width direction movement distance of the scorer 52 that has the largest width direction movement distance among the multiple scorers 52 when changing the order. By setting the target acceleration / deceleration speed α based on the largest width direction movement distance, a larger target acceleration / deceleration speed α is set compared to the case where other width direction movement distances that are not the largest are used. Therefore, the width direction movement required for the order change for all of the multiple slitters 1 and the width direction movement required for the order change for all of the multiple scorers 52 can be accurately completed within the target setup time.

[0109] In addition, according to this embodiment, the vertical movement distance for setting the target acceleration / deceleration speed α is applied according to the thickness of the larger of the cardboard sheets S used before and after the order change. As a result, by setting the target acceleration / deceleration speed α based on the vertical movement distance according to the larger thickness, a larger target acceleration / deceleration speed α is set compared to when using the vertical movement distance according to the smaller thickness. Therefore, the vertical movement that should be performed at the time of order change according to the thicknesses of the cardboard sheets S of the old order and the new order can be accurately completed within the target setup time.

[0110] Further, according to this embodiment, the control device 102 controls the width direction movement mechanism so that the width direction movement speed of the corrugated sheet processing tool 100a becomes maximum when the corrugated sheet processing tool 100a reaches an intermediate position corresponding to half the distance of the width direction movement, and controls the vertical direction movement mechanism so that the vertical direction movement speed of the corrugated sheet processing tool 100a becomes maximum when the corrugated sheet processing tool 100a reaches an intermediate position corresponding to half the distance of the vertical direction movement. In this embodiment, the control device 102 applies a speed profile for both the width direction movement and the vertical direction movement of the corrugated sheet processing tool 100a, in which the movement speed of the corrugated sheet processing tool 100a is accelerated until it reaches the intermediate position of the distance to be moved, the speed is set to the maximum speed when it reaches the intermediate position, and the speed is decelerated after it reaches the intermediate position. In this case, for example, the magnitude of the acceleration / deceleration during the order change can be reduced compared to a speed profile according to a comparative example in which the movement speed of the corrugated sheet processing tool 100a is accelerated to reach the maximum speed just before the intermediate position, and then the maximum speed is maintained for a certain period of time before being decelerated. Therefore, according to the speed profile of this embodiment, the load applied to the movement mechanism of the cardboard sheet processing tool 100a can be effectively reduced compared to other speed profiles.

[0111] Further, according to this embodiment, when the cardboard sheet processing tool 100a is moved at the maximum acceleration / deceleration, the control device 102 calculates the shortest defect dimension, which is the length of the cardboard sheet S moving in the feed direction FW while the cardboard sheet processing tool 100a is moving during the order change, and when the shortest defect dimension is less than the cutter cutting dimension L, the control device 102 sets the target acceleration / deceleration α so that the movement of the cardboard sheet processing tool 100a when changing the order is completed within the target setup time, and when the shortest defect dimension is equal to or greater than the cutter cutting dimension L, the control device 102 sets the target acceleration / deceleration α to the maximum acceleration / deceleration. According to this embodiment, an appropriate target acceleration / deceleration α can be set according to the magnitude relationship between the shortest defect dimension and the predetermined cutter cutting dimension L. In particular, when the shortest defect dimension is equal to or greater than the cutter cutting dimension L, the control device 102 sets the target acceleration / deceleration α to the maximum acceleration / deceleration, so that the movement of the cardboard sheet processing tool 100a when changing the order can be completed within the shortest setup time.

[0112] In addition, according to this embodiment, the control device 102 sets the target acceleration / deceleration α when the corrugated sheet processing tool 100a moves in the width direction and the up-down direction to the same value so that the movement of the corrugated sheet processing tool 100a for the order change is completed within the target setup time. By making the target acceleration / deceleration α of the width direction movement and the target acceleration / deceleration α of the up-down direction movement the same in this way, the processing required for setting the target acceleration / deceleration α can be simplified.

[0113] In a preferred example of this embodiment, a preset fixed dimension is applied to the cutter cutting dimension L. This allows the cutter device 520 to properly cut out defective sheets at the preset fixed dimension when an order is changed. The defective sheets cut out in this manner can be used as underlays for stacked non-defective sheets, for example.

[0114] <Modification> Next, a modification of the above-described embodiment will be described.

[0115] (Variation 1) In the above embodiment, defective parts of the cardboard sheet S that occur when the order is changed are cut by the cutter device 520 at a fixed size, but in the first modified example, the defective parts of the cardboard sheet S may be cut at a size corresponding to the defective size instead of the fixed size. As described above, in the former case, the fixed size is applied as the cutter cutting size data, and in the latter case, the sheet supply speed V L The cutter cutting limit dimension according to the above is applied as the cutter cutting dimension data.

[0116] Specifically, in the first modification, the control device 102 compares the shortest defect dimension with the cutter cutting limit dimension in step S16 of FIG. 13. In this case, the control device 102 compares the shortest defect dimension with the cutter cutting limit dimension based on the sheet supply speed V L Refer to the table showing the relationship between the cutter cutting limit dimension and the current sheet feed speed V L Then, if the comparison result indicates that the shortest defect dimension is equal to or larger than the cutter cutting limit dimension, the control device 102 uses the target setup time T t The target acceleration / deceleration α of the cardboard sheet processing tool 100a is set so as to realize the target setup time T t is the shortest setup time, so in order to realize the shortest setup time, the control device 102 sets the target acceleration / deceleration α of the cardboard sheet processing tool 100a to the maximum acceleration / deceleration α max In this case, the shortest defect dimension is set as the cutter cutting dimension, and the cutter device 520 cuts out the defective sheet corresponding to the shortest defect dimension.

[0117] On the other hand, when the shortest defect dimension is less than the cutter cutting limit dimension, the control device 102 sets the target setup time T t Specifically, the control device 102 refers to a matrix table stored in the storage unit, and sets a target acceleration / deceleration speed α of the cardboard sheet processing tool 100a so as to realize the cutter cutting limit dimension L, the current sheet supply speed V, LA target acceleration / deceleration speed α to be applied according to the width direction movement distance X and the vertical direction movement distance Y to be applied is read out, and this target acceleration / deceleration speed α is set. In this case, the cutter cutting limit dimension is set to the cutter cutting dimension, and the cutter device 520 cuts out the defective sheet corresponding to the cutter cutting limit dimension.

[0118] In this way, in the first modification, the cutter cutting dimension L is determined by the sheet feeding speed V L Thus, when the order is changed and the shortest defective dimension is less than the cutter cutting limit dimension, the cutter device 520 cuts the sheet at the sheet supply speed V L It is possible to appropriately cut out the defective sheet with a cutter cutting limit dimension according to the above. Note that it is not limited to applying the cutter cutting limit dimension itself to the cutter cutting dimension L, and a dimension obtained by adding a predetermined margin to the cutter cutting limit dimension may be applied to the cutter cutting dimension L.

[0119] (Variation 2) In the above embodiment, when changing the order, the control device 102 first moves the corrugated sheet processing tool 100a downward, then moves the corrugated sheet processing tool 100a in the width direction, and then moves the corrugated sheet processing tool 100a upward (see FIG. 11(B)). In other words, the control device 102 moves the corrugated sheet processing tool 100a vertically and widthwise independently. In the second modification, the control device 102 may simultaneously move the corrugated sheet processing tool 100a vertically and widthwise. Specifically, the control device 102 may move the corrugated sheet processing tool 100a widthwise while moving the corrugated sheet processing tool 100a vertically. Hereinafter, the movement in which the vertical movement and the width direction are combined is appropriately called "diagonal movement".

[0120] In this second modification, the control device 102 calculates the setup time T r is the target setup time T tThe target acceleration / deceleration α may be set so as to coincide with (see formula (3)). In one example, the control device 102 may move the corrugated sheet processing tool 100a in the width direction while the corrugated sheet processing tool 100a moves downward from a vertical intermediate position (an intermediate position between the vertical processing position and the moving position) to the moving position, and may move the corrugated sheet processing tool 100a in the width direction while the corrugated sheet processing tool 100a moves upward from the moving position to the vertical intermediate position. In other words, the control device 102 may move the corrugated sheet processing tool 100a in a diagonal direction between the vertical intermediate position and the moving position. In this example, the control device 102 calculates the setup time (T r =t1+t2) is the target setup time T t It can be used as:

[0121] In addition, the corrugated cardboard sheet processing tool 100a is not limited to being moved diagonally between the intermediate position and the moving position in the vertical direction. Preferably, the corrugated cardboard sheet processing tool 100a is moved diagonally at a vertical position where the corrugated cardboard sheet S is not processed by the corrugated cardboard sheet processing tool 100a during the order change.

[0122] (Variation 3) In the above embodiment, the control device 102 sets the target acceleration / deceleration during vertical movement of the cardboard sheet processing tool 100a and the target acceleration / deceleration during widthwise movement to the same value, but in Modification 3, the control device 102 may set the target acceleration / deceleration during vertical movement of the cardboard sheet processing tool 100a and the target acceleration / deceleration during widthwise movement to different values. For example, the control device 102 may set the target acceleration / deceleration during vertical movement to a fixed value, and only the target acceleration / deceleration during widthwise movement to be variable. In this case ... setup time T t Based on this, the target acceleration / deceleration during the width direction movement can be appropriately adjusted.

[0123] (Variation 4) In the above embodiment, an example is shown in which the present invention is applied to a slitter-scorer device 100 having both a slitter 1 and a scorer 52, but the present invention can also be applied to a single machine consisting of either the slitter 1 or the scorer 52 (in this case, only one of the slitter 1 and the scorer 52 becomes the "cardboard sheet processing tool 100a").

[0124] (Variation 5) In the above-described embodiment, the slitter-scorer device 100 has a built-in control device 102, which sets a target setup time for moving the cardboard sheet processing tool 100a in the width direction and up and down direction for an order change, sets a target acceleration and deceleration so that the movement of the cardboard sheet processing tool 100a for the order change is completed within this target setup time, and controls the width direction movement mechanism and up and down direction movement mechanism so that the cardboard sheet processing tool 100a moves at this target acceleration and deceleration when the order is changed.

[0125] In the fifth modification, the control device 102 may be built into an upper production control device 112 that controls the entire corrugator line, and the upper production control device 112 may set the target setup time, set the target acceleration / deceleration speed, and control the width direction movement mechanism and the vertical direction movement mechanism.

[0126] In this case, the electrical configuration of the slitter scorer device 100 shown in Fig. 9 is such that the servo motor for moving the corrugated cardboard sheet processing tool 100a in the width direction and the servo motor for moving the corrugated cardboard sheet processing tool 100a in the vertical direction are connected to the upper production control device 112 via the corresponding width direction servo drive unit and vertical direction servo drive unit. Also, a general-purpose operation unit 110 is connected to the upper production control device 112. Furthermore, a matrix table that specifies the target acceleration and deceleration when the corrugated cardboard sheet processing tool 100a moves during an order change is stored in the memory unit of the upper production control device 112.

[0127] 13, and a similar process for setting a target acceleration / deceleration speed for the scorer 52 is executed by the upper production control device 112. At this time, step S11 in the flowchart (a step in which the control device 102 acquires various information from the upper production control device 112) is omitted. Furthermore, the setup process for the slitter 1 shown in FIG. 14, and a similar setup process for the scorer 52 are also executed by the upper production control device 112. [Explanation of symbols]

[0128] 1 Slitters 22 Slitting knife 29 Servo motor for vertical movement 40 Servo motor for width direction movement 52 Scorer 65 Upper Crease Roll 100 Slitter scorer equipment 100a Corrugated cardboard sheet processing tool 102 Control device 104 Up / Down Servo Drive Unit 106 Width direction servo drive unit 110 General purpose operation unit 112 Upper production control device 114 Rotational Pulse Generator 501 Corrugated cardboard sheet production equipment 520 Cutter device S Corrugated cardboard sheet

Claims

1. A slitter-scorer device that processes cardboard sheets continuously fed along a feed line to provide cuts and creases, A corrugated cardboard sheet processing tool including: a plurality of slitters arranged in parallel in a width direction perpendicular to the supply direction of the corrugated cardboard sheet, and providing the corrugated cardboard sheet with cuts along the supply direction; and a plurality of scorers arranged in parallel in the width direction, and providing the corrugated cardboard sheet with creases along the supply direction; A width direction moving mechanism that moves each of the plurality of slitters and each of the plurality of scorers provided in the cardboard sheet processing tool in the width direction; A vertical movement mechanism for moving each of the plurality of slitters and each of the plurality of scorers provided in the cardboard sheet processing tool in the vertical direction; A control device configured to control the width direction movement mechanism and the vertical direction movement mechanism; having A cutter device is provided downstream of the slitter-scorer device in the supply direction to cut the cardboard sheet processed by the slitter-scorer device along the width direction, The control device includes: In order to change the position of the cardboard sheet processing tool in order to change the order of the cardboard sheet to be produced, a target setup time for moving the cardboard sheet processing tool in the width direction and the vertical direction is set based on a predetermined cutting dimension along the supply direction of the cardboard sheet cut by the cutter device at the time of the order change and the supply speed of the cardboard sheet; A target acceleration / deceleration is set when the cardboard sheet processing tool moves during the order change so that the movement of the cardboard sheet processing tool for the order change is completed within the target setup time; controlling the width direction movement mechanism and the vertical direction movement mechanism so that the cardboard sheet processing tool moves at the target acceleration / deceleration when the order is changed; It is configured as follows: A slitter scorer apparatus characterized by:

2. The slitter-scorer device of claim 1, wherein the control device is configured to set the target acceleration / deceleration based on the specified cutting dimension, the supply speed, and the widthwise and vertical movement distances that the cardboard sheet processing tool should be moved for the order change so that the movement of the cardboard sheet processing tool for the order change is completed within the target setup time.

3. The slitter-scorer device of claim 2, wherein the control device is configured to set the target acceleration / deceleration speed according to the values ​​of the four parameters to be applied when the order is changed, by referring to a matrix table in which the four parameters, namely the specified cutting dimension, the supply speed, the widthwise movement distance, and the vertical movement distance, are pre-correlated with the target acceleration / deceleration speed to be applied according to these four parameters.

4. The slitter-scorer device of claim 2 or 3, wherein the widthwise movement distance is determined by the widthwise movement distance of the slitter among the plurality of slitters which has the greatest widthwise movement distance at the time of the order change, and the widthwise movement distance of the scorer among the plurality of scorers which has the greatest widthwise movement distance at the time of the order change.

5. The slitter-scorer device of claim 2 or 3, wherein the widthwise movement distance includes a widthwise movement distance by which each of the plurality of slitters should be moved for the order change, and a widthwise movement distance by which each of the plurality of scorers should be moved for the order change.

6. The slitter-scorer device according to any one of claims 2 to 5, wherein the vertical movement distance is determined based on the thickness of the larger of the cardboard sheets used before and after the order change.

7. The control device includes: When the cardboard sheet processing tool reaches an intermediate position corresponding to a distance that is half the widthwise moving distance by which the cardboard sheet processing tool should be moved for the order change, the widthwise moving mechanism is controlled so that the widthwise moving speed of the cardboard sheet processing tool becomes a maximum speed; When the cardboard sheet processing tool reaches an intermediate position corresponding to half the distance of the vertical movement of the cardboard sheet processing tool to be moved for the order change, the vertical movement mechanism is controlled so that the vertical movement speed of the cardboard sheet processing tool becomes a maximum speed. The slitter-scorer apparatus according to any one of claims 1 to 6, configured as follows:

8. The control device includes: In order to change the position of the cardboard sheet processing tool for the order change, when the cardboard sheet processing tool is moved in the width direction and the up-down direction at a maximum acceleration and deceleration that can be set for the width direction movement mechanism and the up-down direction movement mechanism, a minimum defect dimension is calculated, which is a length that the cardboard sheet moves in the supply direction while the cardboard sheet processing tool is moving at the time of the order change; When the shortest defective dimension is less than the predetermined cutting dimension, the target acceleration / deceleration is set so that the movement of the cardboard sheet processing tool when performing the order change is completed within the target setup time; When the shortest defect dimension is equal to or greater than the predetermined cutting dimension, the target acceleration / deceleration is set to the maximum acceleration / deceleration. The slitter-scorer apparatus according to any one of claims 1 to 7, configured as follows:

9. The slitter-scorer device according to any one of claims 1 to 8, wherein the control device is configured to set the target acceleration / deceleration when the cardboard sheet processing tool moves in the width direction and the vertical direction to the same value so that the movement of the cardboard sheet processing tool for the order change is completed within the target setup time.

10. 10. The slitter-scorer apparatus of claim 1, wherein the predetermined cut size is a pre-set fixed size.

11. The slitter-scorer device according to any one of claims 1 to 9, wherein the predetermined cutting dimension is a dimension corresponding to the minimum dimension along the feed direction of the cardboard sheet that can be cut by the cutter device depending on the feed speed.

12. The slitter-scorer device according to claim 1 , further comprising a display unit that displays the target acceleration / deceleration set by the control device.

Images