JP6561401B2 - Slitter device - Google Patents

Description

  The present invention relates to a slitter device, and more particularly, to a slitter device that cuts a corrugated cardboard sheet that is continuously supplied along a supply line.

  2. Description of the Related Art Conventionally, there is known a slitter scorer device in which a scorer device for providing a ruled line to a corrugated cardboard sheet and a slitter device for cutting the cardboard sheet are arranged in order along the supply direction (conveying direction) of the cardboard sheet. ing. In the slitter device of such a slitter scorer device, generally, the number of pages to be picked from a corrugated cardboard sheet, or the width to be picked that is the length in the width direction of one sheet to be picked is used. When changed (order change), the slitter is moved in the width direction of the cardboard sheet. In that case, as shown in FIG. 13, while the slitter is moved in the width direction, the corrugated cardboard sheet SH is cut obliquely by the slitter (see arrow A1), and thus cut diagonally, at least to the length L1. Corresponding corrugated cardboard sheets SH become defective sheets.

  A technique for dealing with such a defective sheet as described above is disclosed in Patent Document 1, for example. Patent Document 1 discloses a technology in which two slitter scorer devices are arranged in series along a corrugated board production line (corrugator). Specifically, in the technique disclosed in Patent Document 1, while one of the two slitter scorer devices is performing cutting processing and ruled line processing of the cardboard sheet, the other slitter scorer device is in the next order. When the order change position on the cardboard sheet reaches the slitter scorer, the slitter scorer device starts cutting and ruled line processing. By doing so, the above-described defective sheets are reduced.

  However, when two slitter scorer devices are arranged in series on the production line as in the technique described in Patent Document 1, the facility cost increases and the size of the facility increases. Further, depending on the production line, there are cases where two slitter scorer devices cannot be arranged in series due to space constraints. For such a production line in which it is difficult to arrange two slitter scorer devices, only one slitter scorer device is applied as in the technique disclosed in Patent Document 2, for example. A method is effective in which each processing tool of the apparatus (each tool of the slitter device and the scorer device) is configured to be individually movable in the vertical direction and the width direction by a servo motor, and the movement of each processing tool is controlled at high speed. According to this method, even if there is only one slitter scorer device, it is possible to appropriately reduce the length of the defective sheet by shortening the movement time of the processing tool in the width direction.

Japanese Examined Patent Publication No. 62-52705 Japanese Patent No. 3717167

  In recent years, as small orders for corrugated cardboard production are progressing, the number of order changes per day production has increased, so only one slitter scorer device as described in Patent Document 2 is used. Also in the configuration, it is required to further reduce the length of the defective sheet. Under such a background, the inventors of the present invention investigate the length of a defective sheet for various combinations of the number of pickings to be changed in order, and the appearance rate of the combinations of these various numbers of pickings. It was. Here, a result in the case of using a slitter scorer device having a maximum number of four picks (that is, a four-seat slitter scorer device) will be described as an example.

As a result of the above investigation, when changing the order between 4 and 3 picks, the length of the defective sheet becomes considerably long and the order changes between 4 and 2 picks and 4 picks. Change order between 1 and 2 picks, the length of the defective sheet is relatively short, order change between 3 and 2 picks, between 3 picks and 1 pick It was found that the length of the defective sheet was considerably shortened when the order was changed and when the order was changed between two and one orders. For example, when the production speed (conveyance speed) of the corrugated cardboard sheet is 240 m / min, the length of the defective sheet is 1200 to 1400 mm (converted into time) when the order is changed between 4 and 3 picks. 0.3 to 0.35 seconds), and when changing orders between 4 and 2 picks and changing orders between 4 and 1 picks, the length of the defective sheet is 1000 mm. (If converted to time, 0.25 seconds), and other order changes, the length of the defective sheet is 800 mm (converted to time, 0.2 seconds).
As a result, in the order change between 4 and 3 picks, compared to other order changes, the distance to move the slitter in the width direction of the cardboard sheet is longer when changing the order. This means that the movement time in the width direction is long.

  Next, with reference to FIG. 14, the appearance rate of various combinations of the number of picks that are changed in order will be described. FIG. 14A shows, as a reference (that is, a reference value), the appearance ratios of various combinations of the number of picks when the ratio of the appearance ratios of the numbers of picks is constant, and FIG. , (C), and (d) show the results of examining the appearance rates of various combinations of the number of picked-up orders that have been changed for different cardboard manufacturers. In addition, on the right side of FIGS. 14 (a) to 14 (d), in order from the top, the total appearance rate of order change between 4 and 3 picks (see hatched part), 4 picks and The sum of the rate of occurrence of order changes between 2 orders and the order of change of orders between orders of 4 and 1 (see the part surrounded by bold lines), the sum of the rate of occurrence of orders other than these, Is shown.

  14 (b) to 14 (d), it can be said that the appearance rate of order change between 4 and 3 picks is not so high in each manufacturer. However, as described above, when changing the order between 4 and 3 orders, the length of the defective sheet becomes considerably long, so an order change between 4 and 3 orders appears. Even if the rate is not so high, it is performed as it is, so it is considered that it is a factor that deteriorates the average defect rate regarding the cutting of the cardboard sheet. For this reason, in order to further reduce the average defect rate from the current level, it is desirable to reduce the length of the defective sheet that is generated when the order is changed between 4 and 3 picks.

  In addition to the order change between 4 and 3 picks, the order change between 5 and 4 picks is not very high, but the defective sheet Is known to be quite long. Therefore, it can be said that it is desirable to shorten the length of the defective sheet generated when the order is changed between 5 and 4 picks.

  Therefore, the present invention provides a slitter device capable of appropriately reducing the length of defective sheets generated at the time of order change with respect to the order change of the number of picked sheets that tends to increase the length of defective sheets in the prior art. The purpose is to provide.

In order to achieve the above object, the present invention provides a slitter device for cutting a cardboard sheet continuously supplied along a supply line, which is on the same axis in the width direction with respect to the supply direction of the cardboard sheet. A plurality of slitters arranged in parallel and each having a slitter knife that cuts the cardboard sheet, a vertical movement mechanism that independently moves the slitters in the vertical direction, and the number of sheets picked up from the cardboard sheet Based on a certain number of picks, among the plurality of slitters, a slitter used for cutting the cardboard sheet is disposed at a predetermined processing position in the vertical direction, and a slitter not used for cutting the cardboard sheet is used. A control device that controls the vertical movement mechanism so as to be arranged at a predetermined non-working position in the vertical direction, The cutter includes a first slitter group including N + 1 slitters for performing the picking with respect to the maximum picking number N of the slitter device, and a picking number N smaller than the maximum picking number N. -1 and a second slitter group including one or more slitters, and the control device switches the first slitter group when switching the number of pickings from N to N-1. The vertical movement mechanism is controlled so that a part of the slitters are arranged at the non-machining position and the second slitter group is arranged at the machining position, and the number of picks is changed from N-1 to N. when switching is the second slitter group are arranged in the non-working position, and a portion of the slitter in the first slitter group to place the processing position, and controls the vertical direction moving mechanism, the first Remove some slitters in the slitter group. The other slitter includes two slitters arranged at both ends in the width direction of the plurality of slitters, and the control device does not switch the number of pickings between N and N-1, and at least One slitter is maintained at the processing position .

According to the present invention configured as described above, in addition to the N + 1 slitters necessary for performing the maximum number of picking up N, the picking up of the number of picking up N−1 is performed. When one or more slitters are additionally used to switch the number of pickings between N and N-1, some slitters in the first slitter group consisting of N + 1 slitters Since the second slitter group consisting of one or more slitters is moved in the vertical direction so as to be switched between the machining position and the non-machining position, the distance (time) by which the slitter is moved in the width direction at the time of switching. Can be shortened appropriately. Therefore, according to the present invention, the length of the defective sheet generated when switching the number of orders between N and N-1 (when the order is changed), which tends to increase the length of the defective sheet in the prior art. Therefore, it is possible to appropriately reduce the average defect rate relating to the cutting of the cardboard sheet.
Note that “N” described above is a natural number of 2 or more, and preferably a natural number of 3 or more.

In the present invention, preferably, the plurality of slitters include first to seventh slitters, and these first to seventh slitters are directed from one end side to the other end side in the width direction of the cardboard sheet. The first slitter, the second slitter, the third slitter, the fourth slitter, the fifth slitter, the sixth slitter, and the seventh slitter are arranged in this order. When 4 is applied as the number N, the first, second, fourth, sixth, and seventh slitters are used as the first slitter group, and the third and fifth slitters are used as the second slitter group. When using 4-cutter, the 1st, 2nd, 4th, 6th and 7th slitters are arranged at the processing position, and when performing 3-cutter, the 1st, 3rd, 3rd Move up and down to place 5th and 7th slitters at machining position When the structure is controlled and switching between the 4-cutter and the 3-cutter is performed, the second, fourth, sixth slitter, and the third slitter are kept in the processing position while the first and seventh slitters are arranged in the processing position. The vertical movement mechanism is controlled so that one of the fifth slitter and the fifth slitter is arranged at the machining position and the other of them is arranged at the non-machining position.
According to the present invention configured as described above, the five slitters (first, second, fourth, sixth and seventh) which are the minimum necessary to perform the four picking corresponding to the maximum picking number. In addition to using two slitters (third and fifth slitters) as an application to three-cutter, switching between four-cutter and three-cutter In addition, some of the second, fourth, and sixth slitters of the five slitters that are applied to the four-cuttering, and the two third and fifth slitters that are applied to the three-cuttering are processed. Since it is moved in the vertical direction so as to be switched between the position and the non-working position, the distance (time) for moving the slitter in the width direction at the time of switching can be appropriately shortened. Therefore, according to the present invention described above, the length of the defective sheet that is generated when the order is changed between 4 and 3 picks can be appropriately shortened.

In the present invention, preferably, the plurality of slitters include first to seventh slitters, and these first to seventh slitters are directed from one end side to the other end side in the width direction of the cardboard sheet. The first slitter, the second slitter, the third slitter, the fourth slitter, the fifth slitter, the sixth slitter, and the seventh slitter are arranged in this order. When 5 is applied as the number N, the first, second, third, fifth, sixth, and seventh slitters are used as the first slitter group, and the fourth slitter is used as the second slitter group. When using 5 picks, the 1st, 2nd, 3rd, 5th, 6th and 7th slitters are arranged at the processing position, and when performing 4 picks, the 1st, 2nd 2nd, 4th, 6th and 7th slitters are arranged at the machining position. When the direction moving mechanism is controlled to switch between 5 and 4 picking, the first and second, sixth and seventh slitters remain in the processing position, and the third and fifth The vertical movement mechanism is controlled so that one of the slitter and the fourth slitter is arranged at the machining position and the other of them is arranged at the non-machining position.
According to the present invention configured as described above, six slitters (first, second, third, fifth, and sixth) that are the minimum necessary to perform five orders corresponding to the maximum number of orders. And a seventh slitter), when one slitter (fourth slitter) is additionally used as an application to four picking and switching between five picking and four picking. In addition, a part of the third and fifth slitters among the six slitters applied to the five-cutter and a fourth slitter applied to the four-cutter are divided into a processing position and a non-processing position. Therefore, the distance (time) for moving the slitter in the width direction at the time of switching can be appropriately shortened. Therefore, according to the present invention described above, the length of the defective sheet that occurs when changing the order between 5 and 4 picks can be appropriately shortened.

In the present invention, preferably, it further includes a width direction moving mechanism for independently moving the first to seventh slitters in the width direction of the corrugated cardboard sheet, and the control device has the number of picks and one piece to be picked. The width direction moving mechanism is controlled so that each of the first to seventh slitters is moved in the width direction according to the trimming width which is the length of the sheet in the width direction.
According to the present invention configured as described above, when the slitter is moved in the vertical direction in accordance with the change in the number of pickings as described above, the slitter is adjusted in accordance with the number of pickings and the width of the cardboard sheet. It can be moved appropriately in the direction.

In the present invention, it is preferable that the control device applies the first, second, fourth, sixth, and seventh slitters to cut the corrugated cardboard sheet when switching to four picking. When the position in the width direction to be set according to the trimming width is applied to each of the seventh slitters, the first, second, and fourth when the interval between adjacent slitters is equal to or less than a predetermined threshold value. The vertical movement mechanism is controlled so as to cut the corrugated cardboard sheet by applying the third and fifth slitters instead of the first and seventh slitters in the sixth and seventh slitters.
According to the present invention configured in this way, when switching to four-cutter, each slitter determines the position in the width direction to be set according to the cuff width in order to apply a combination of slitters suitable for this four-cutter. When the interval between adjacent slitters is equal to or less than a predetermined threshold value, the slitter combination suitable for the above-described 4-cuttering is not applied, but another slitter combination is applied to perform the 4-cuttering. Therefore, the interval between adjacent slitters can be appropriately ensured to be larger than a predetermined threshold value. For example, the predetermined threshold value is determined by mechanical restrictions according to the thickness in the width direction of the width direction moving mechanism.

In the present invention, it is preferable that the control device is configured to apply the first, third, fifth, and seventh slitters to cut the corrugated cardboard sheet when switching to three picking. When the position in the width direction to be set according to the trimming width is applied to each of the slitters, the first, third, fifth, and seventh when the interval between adjacent slitters is equal to or less than a predetermined threshold value. The vertical movement mechanism is controlled so that the cardboard sheet is cut by applying the second and sixth slitters instead of the first and seventh slitters.
According to the present invention configured as described above, when switching to 3 picking, the width direction position to be set according to the picking width is applied to each slitter in order to apply a combination of slitters suitable for the three picking. When the interval between adjacent slitters is equal to or smaller than a predetermined threshold, the slitter combination suitable for the above three-cutter is not applied, but another slitter combination is applied to perform the three-cutter. Therefore, the interval between adjacent slitters can be appropriately ensured to be larger than a predetermined threshold value. For example, the predetermined threshold value is determined by mechanical restrictions according to the thickness in the width direction of the width direction moving mechanism.

  According to the slitter device according to the present invention, the order change of the number of picking that tends to increase the length of the defective sheet in the prior art (for example, order change between four picking and three picking or five picking And the order change between the four picks), the length of the defective sheet generated at the time of the order change can be appropriately reduced.

It is a schematic side view which shows the slitter scorer apparatus to which the slitter apparatus by embodiment of this invention is applied. It is a schematic front view which shows the slitter apparatus by embodiment of this invention. It is a schematic side view which shows the slitter apparatus by embodiment of this invention. It is a schematic front view which shows the lower slitter of the slitter apparatus by embodiment of this invention. It is a block diagram which shows the control circuit of the slitter scorer apparatus by embodiment of this invention. It is a top view which shows typically the width direction position of the slitter knife of the slitter by embodiment of this invention. It is a top view which shows typically the slitter knife of the slitter used when performing 4 picking, 3 picking, 2 picking, and 1 picking in 1st Embodiment of this invention. It is explanatory drawing of the control performed when switching from 4 to 3 picking by order change in 1st Embodiment of this invention. It is a flowchart which shows the order change control by 1st Embodiment of this invention. It is a top view which shows typically the slitter knife of the slitter used when performing 5 picking, 4 picking, 3 picking, 2 picking, and 1 picking in 2nd Embodiment of this invention. It is explanatory drawing of the control performed when switching from 5 to 4 picking by order change in 2nd Embodiment of this invention. It is a flowchart which shows the order change control by 2nd Embodiment of this invention. It is explanatory drawing about the defective sheet which generate | occur | produces at the time of order change in a prior art. It is a figure which shows the investigation result about the appearance rate of the combination of the various number of pickings in which an order change is made.

  Hereinafter, a slitter device according to an embodiment of the present invention will be described with reference to the accompanying drawings. In the following, a slitter scorer device in which a slitter device and a scorer device are provided in series will be described as an example. However, it goes without saying that the present invention can also be applied to a single machine of the slitter device.

<Device configuration>
First, the configuration of a slitter device according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic side view showing a slitter scorer device to which a slitter device according to an embodiment of the present invention is applied, FIG. 2 is a schematic front view showing a slitter device according to an embodiment of the present invention, and FIG. FIG. 4 is a schematic side view showing a slitter device according to an embodiment of the present invention, and FIG. 4 is a schematic front view showing a lower slitter of the slitter device according to an embodiment of the present invention.

  As shown in FIG. 1, the slitter scorer device 100 has a scorer device 201 including two scorers 52 on the upstream side in the supply direction of the cardboard sheet SH, and a slitter device 202 including the slitter 1 on the downstream side thereof. . Specifically, as shown in FIG. 2, the slitter 1 of the slitter device 202 includes seven slitters arranged in parallel on the same axis in the width direction, that is, the direction substantially perpendicular to the sheet feeding direction. (In the following, when the slitters 1a to 1g are used without being distinguished from each other, “a” to “g” are omitted and simply referred to as “slitter 1.” Each component of the slitters 1a to 1g. The same applies to requirements). Each of the two scorers 52 of the scorer device 201 is composed of a plurality of scorers arranged in parallel in the width direction (not shown).

  As shown in FIG. 3, the slitter 1 has an upper slitter 2 on the upper side and a lower slitter 11 on the lower side across a paper line on which the cardboard sheet SH travels. The slitter 1 is a so-called lower one-blade type slitter having a slitter knife 22 below the paper line and a slitter receiving member 10 receiving the slitter knife 22 on the upper side. In some cases, the upper and lower slitters may be a slitter having a slitter knife, or one of them may be a slitter knife and the other may be a slitter knife receiving member.

  As shown in FIGS. 3 and 4, the lower slitter 11 is attached to the guide rails 15a and 15b of the stay 12 with the lower slitter frame 13 mounted on a frame (not shown) via support portions 14a and 14b. Yes. The lower slitter 11 is attached to the lower slitter frame 13, and is moved by a moving mechanism (width direction moving mechanism) in the machine width direction including a bearing portion 16 a screwed with a screw shaft 17 a mounted between frames (not shown). It is configured so that it can be positioned at a position corresponding to the production order. In particular, as shown in FIG. 4, the positioning mechanism (width direction moving mechanism) in the machine width direction includes a screw shaft 17 a that is rotated by a drive device 40 attached to a frame of the slitter 1 (not shown) via a bracket 39. A bearing fixed to the lower slitter frame 13 on the rotating screw shaft 17a by screwing with a bearing portion 16a provided on the lower slitter frame 13 of the lower slitter 11 and rotating the screw shaft 17a by starting the driving device 40. The lower slitter 11 moves in the machine width direction via the portion 16a. The driving device 40 is a servo motor, and may be hereinafter referred to as a “width-direction moving servo motor 40”.

  2 to 4 is a screw shaft for moving and positioning the slitter 1a in the width direction of the lower slitter 11, and in the width direction of the lower slitter 11 of the slitters 1b to 1g other than the slitter 1a. Are moved and positioned using the screw shafts 17 prepared for each of them (the drive device 40 is also prepared for each of the slitters 1b to 1g). Also in this case, each of the lower slitters 11 of the slitters 1 b to 1 g is moved in the width direction on the screw shaft 17 via the bearing portion 16. With such a configuration, the lower slitters 11 of the seven slitters 1a to 1g are independently moved in the width direction of the cardboard sheet SH.

  A slitter knife 22 is attached to the lower slitter frame 13, and further vertically between a load position (processing position) for cutting the cardboard sheet SH traveling on the slitter knife 22 and an unload position (non-processing position). It has a vertical movement mechanism that enables movement. Specifically, the vertical movement mechanism includes a first arm 19 that is fixed to the lower slitter frame 13 and a first arm that is rotatable via a fulcrum portion 23 that is positioned on a slitter knife rotation drive shaft described later. 19 and a second arm 20 that is rotatably connected to the slitter knife 22 via the rotation support portion 21, a second arm 20 that is connected to the second arm 20 via the first fulcrum portion 25, and a second fulcrum portion 26. The link mechanism 18 which consists of the link arm 24 connected with the rotation mechanism 27 mentioned later via this. The rotation mechanism 27 includes a drive device 29, a screw shaft 30 connected to the drive device 29, and a sliding member 32 that is slidable on the screw shaft 30 along the slide rail 28 and screwed to the screw shaft 30. The screw shaft fixing base 31 is rotatably mounted on the screw shaft 30 and mounted on the sliding member 32, and is connected to the connecting arm 24 via the second fulcrum portion 26. And a connecting body 33. The driving device 29 is a servo motor, and may be hereinafter referred to as “servo motor 29 for vertical movement”.

  As described above, in the vertical movement mechanism, when the driving device 29 of the rotation mechanism 27 is started, the screw shaft 30 rotates and the sliding member 32 screwed with the screw shaft 30 slides on the slide rail 28. Thus, the connecting arm 24 attached to the sliding member 32 via the connecting body 33 is accompanied, and the second arm 20 and the connecting arm 24 are engaged with the fulcrum 23 of the first arm 19 and the second arm 20 as a fulcrum. The mating first fulcrum part 25 is configured to rotate in accordance with the movement of the connecting arm 24. Note that such a vertical movement mechanism is applied to each of the lower slitters 11 of the seven slitters 1a to 1g, and the slitter knives 22 of the seven slitters 1a to 1g correspond to the processing positions and non-processing. It moves independently in the vertical direction between positions.

  As shown in FIG. 4, the rotation drive mechanism of the slitter knife 22 is connected to a slitter knife rotation drive device (not shown) attached to a frame or the like, and is rotatably connected to the slitter knife rotation drive device. A drive shaft 41 extending substantially in parallel, a first drive transmission member 37 fixed to the drive shaft 41 via a first drive transmission member holder 35, and an intermediate shaft 34 via a second drive transmission member holder 36 A second drive transmission member 38 that is fixed and engages with the first drive transmission member 37 so as to transmit the rotational driving force. A first arm 19 and a second arm 20 are rotatably supported on the drive shaft 41 by a bearing or the like on the drive shaft 41 to constitute a fulcrum portion 23. The slitter knife 22 is configured to rotate by transmitting a rotational driving force from a slitter knife driving device (not shown) from the first drive transmission member 37 via the drive shaft 41 via the second drive transmission member 38, and When the lower slitter 18 moves in the machine width direction along the screw shaft 17 as described above, the first drive transmission member holding body 35 slides on the drive shaft 41 in the same direction. The rotating peripheral speed of the slitter knife 22 is generally a little faster than the traveling speed of the corrugated cardboard sheet SH, and depending on the production conditions, the slitter knife 22 is rotated at a rotating peripheral speed more than twice the traveling speed of the corrugated cardboard sheet SH. May be. The slitter knife 22 has a rotation drive mechanism that uses an existing transmission mechanism and, for example, directly attaches a rotation drive device or the like on the axis of the rotation support portion 21 of the slitter knife 22 as long as the slitter knife 22 is given a rotational force. Thus, the slitter knife 22 may be directly rotated.

  On the other hand, the upper slitter 2 is supported in its support method and moved in the width direction except that a slitter receiving member 10 that does not move between the load position and the unload position is provided instead of the slitter knife 22. This method is the same as that of the lower slitter as follows.

  As shown in FIG. 3, the upper slitter frame 4 is attached to the guide rails 6a and 6b of the stay 3 mounted on a frame (not shown) via support portions 5a and 5b. The upper slitter 2 is attached to the upper slitter frame 4, and is moved by a moving mechanism (width direction moving mechanism) in the machine width direction including a screw shaft 8 a mounted between the frames (not shown) and a bearing portion 7 a screwed. It is configured so that it can be positioned at a position corresponding to the production order.

  2 and 3 is a screw shaft for moving and positioning the slitter 1a in the width direction of the upper slitter 2, and in the width direction of the upper slitter 2 of the slitters 1b to 1g other than the slitter 1a. These movements and positioning are performed using the screw shafts 8 prepared for each. Also in this case, each of the upper slitters 2 of the slitters 1 b to 1 g moves in the width direction on the screw shaft 8 via the bearing portion 7. With such a configuration, each of the upper slitters 2 of the seven slitters 1a to 1g moves independently in the width direction of the cardboard sheet SH.

  On the upper slitter frame 4, a slitter receiving member 10 that receives a slitter knife 22 described later is rotatably supported by a rotation support portion 9. Since the slitter receiving member 10 is a member that receives a slitter knife 22 to be described later in order to cut the traveling cardboard sheet SH, the vertical positioning position of the slitter receiving member 10 on the cardboard sheet SH is the position of the cardboard sheet SH. A position in contact with the upper surface is good. In this case, the slitter receiving member 10 may be a mechanism that is positively rotated by a rotation driving mechanism (not shown), or the outer peripheral surface of the slitter receiving member 10 is in contact with the traveling cardboard sheet SH, and is rotated by the frictional force or the slitter. The knife 22 may be in contact with the slitter receiving member 10 and rotated by the frictional force thereof.

  On the other hand, the scorer 52 of the scorer device 201 basically has the same configuration as the slitter 1 of the slitter device 202 described above. Therefore, detailed description of the configuration similar to that of the slitter 1 is omitted here, and only differences from the slitter 1 will be described briefly.

  As shown in FIG. 1, the scorer 52 differs in that the slitter 1 cuts the cardboard sheet SH, but differs in that a ruled line is attached to the surface of the cardboard sheet SH. Therefore, the slitter knife 22 and the upper slitter of the lower slitter 11 are different. Instead of the two slitter receiving members 10, the lower scorer 77 is provided with a lower ruled line roll 86, and the upper scorer 53 is provided with an upper ruled line roll 65. In the case of the slitter 1, a vertical movement mechanism is provided on the lower side to move the slitter knife 22 in the vertical direction between the load position (processing position) and the unload position (non-processing position). In the case of the scorer 52, a vertical movement mechanism is provided on the upper side for moving the upper ruled line roll 65 in the vertical direction between a load position for applying a ruled line and an unloading position for not applying a ruled line.

  Next, an electrical configuration of the slitter scorer device 100 according to the embodiment of the present invention will be described with reference to FIG. FIG. 5 is a block diagram showing a control circuit of the slitter scorer device 100 according to the embodiment of the present invention.

  As shown in FIG. 5, the control circuit 101 of the slitter scorer device 100 has a built-in control device 102, and the slitters 1 a to 1 g are connected to the seven slitters 1 a to 1 g via the width direction moving mechanism described above. In the vertical direction for moving (elevating and lowering) the slitters 1a to 1g in the vertical direction through the servo motors 40a to 40g for moving in the width direction for moving the cardboard sheet SH in the width direction and the above-described vertical movement mechanism. Servo motors 29a to 29g for movement. The width direction moving servo motors 40a to 40g (40) are connected to the control device 102 via the width direction servo driving units 104a to 104g (104), respectively, and the vertical direction moving servo motors 29a to 29g (29) are Are connected to the control device 102 via the vertical servo drive units 106a to 106g (106), respectively. Further, position detecting means 108 disposed in each of the width direction moving and vertical direction moving servo motors 40 and 29 is connected to the corresponding servo drive unit, and the slitter 1 is positioned at the width direction position and the vertical direction position, respectively. Find the corresponding position.

  Further, the control device 102 is connected to a general-purpose operation unit 110 such as a keyboard and a touch panel disposed on an operation panel (not shown) of the slitter scorer device 100 and a host production management device 112 for managing the entire corrugator line. Further, a double facer (not shown) or a rotation pulse generator that actually detects the sheet speed is also connected. Data such as the cutting position of each slitter knife set corresponding to each order, the scoring position of each roll set, etc. are input in advance by the general-purpose operation unit 110, and the same command is also issued from the host production management device 112, In addition, the supply speed (feed speed) of the cardboard sheet SH is also given. Although not shown in the drawings, the width direction moving servo motor and the vertical direction moving servo motor provided in each scorer 52 are similarly connected to the control device 102 via corresponding servo drive units.

<Control details>
Next, the contents of control performed by the control device 102 (see FIG. 5) in the embodiment of the present invention will be described. In the present embodiment, the control device 102 performs control to move the slitter 1 in the vertical direction when changing the order, particularly when changing the number of picks. Specifically, the control device 102 arranges the slitter 1 used to cut the corrugated cardboard sheet SH among the seven slitters 1a to 1g at the processing position based on the number of picks after the order is changed. The upper and lower direction servo drive unit 106 and the up and down direction moving servo motor 29 are moved up and down so that the remaining slitter 1 not used for cutting the corrugated cardboard sheet SH is disposed at the non-processing position (standby position). Control the mechanism. In addition, the control device 102 controls the width direction servo drive unit 104 so that each of the seven slitters 1a to 1g is arranged at an appropriate position in the width direction based on the number of pickings and the picking width after the order is changed. And the width direction moving mechanism is controlled via the servo motor 40 for width direction movement.
Below, specific embodiment (1st and 2nd embodiment) of the control content which the above-mentioned control apparatus 102 performs is demonstrated.

(First embodiment)
The control according to the first embodiment of the present invention relates to the contents of control performed when changing the order between 4 and 3 picks when applying 4 (4 picks) as the maximum number of picks. .

  First, with reference to FIG. 6, the definition regarding the width direction position of each of the seven slitters 1a to 1g will be described. FIG. 6 is a plan view schematically showing the position in the width direction of the slitter knife 22 of the slitter 1 according to the embodiment of the present invention.

  In FIG. 6, symbols SN0 to SN6 indicate the slitter knife 22 of the slitter 1 (hereinafter, the slitter knife is appropriately described using the symbols SN0 to SN6 without using the symbol 22, and the slitter knife SN0 to SN0. When SN6 is used without distinction, it is simply expressed as “slitter knife SN”). As shown in FIG. 6, a slitter knife located at the machine center is defined as SN0 with reference to the machine center of the slitter device 202 (corresponding to the center in the width direction of the cardboard sheet SH), and the outside of the slitter knife SN0. Are defined as SN1, SN2, and the slitter knives adjacent to the outside of the slitter knives SN1, SN2 are defined as SN3, SN4. The slitter knives adjacent to the outside of the slitter knives SN3, SN4 are defined as SN5, It is defined as SN6. Further, in the following, when the position of the slitter knife SN0 to SN6 in the width direction is indicated, the slitter knife SN5 side, that is, the operation side is set to a positive value with reference to the position of the slitter knife SN0 in the width direction (that is, 0). It is assumed that the slitter knife SN6 side, that is, the drive side is expressed as a negative value (negative value). Basically, the slitter knives SN1 and SN2 are arranged at symmetrical positions with the slitter knife SN0 interposed therebetween, and the slitter knives SN3 and SN4 are arranged at symmetrical positions with respect to the slitter knife SN0, and the slitter knives SN5 and SN6 are arranged. Are arranged at symmetrical positions across the slitter knife SN0.

  The slitter knife SN6 is included in the slitter 1a, the slitter 1a corresponds to the “first slitter” in the present invention, the slitter knife SN4 is included in the slitter 1b, and the slitter 1b is the “second slitter” in the present invention. The slitter knife SN2 is included in the slitter 1c. The slitter 1c corresponds to the “third slitter” in the present invention, and the slitter knife SN0 is included in the slitter 1d. The slitter knife SN1 corresponds to the “fourth slitter”, and is included in the slitter 1e. The slitter 1e corresponds to the “fifth slitter” in the present invention, and the slitter knife SN3 is included in the slitter 1f. Corresponds to the “sixth slitter” in the present invention, and the slitter knife SN5 is a slitter 1g. Rarely, the slitter 1g corresponds to the "seventh slitter of" in the present invention.

  Next, referring to FIG. 7, in the first embodiment of the present invention, the slitter knife of the slitter 1 used for cutting the corrugated cardboard sheet SH when performing four picking, three picking, two picking, and one picking. The SN will be described. FIGS. 7 (a), (b), (c), and (d) schematically show slitter knives SN that are used when four picking, three picking, two picking, and one picking, respectively. ing. 7A to 7D, the slitter knife SN represented by a solid line indicates what is used for cutting the corrugated cardboard sheet SH, that is, what is disposed at the processing position. On the other hand, the slitter knife SN indicated by a broken line indicates a slitter knife SN that is not used for cutting the cardboard sheet SH, that is, a slitter knife SN that is disposed at a non-processing position. Such definitions of the solid line and the broken line are similarly applied to the drawings described later.

  As shown in FIG. 7 (a), in the case of four picking, the cardboard sheet SH is basically cut using slitter knives SN0, SN3, SN4, SN5, SN6. In this case, the control device 102 arranges the slitter knives SN0, SN3, SN4, SN5, and SN6 at the machining position, and arranges the remaining slitter knives SN1 and SN2 at the non-machining positions. Further, as shown in FIG. 7 (b), in the case of performing three picking, basically, the cardboard sheet SH is cut using the slitter knives SN1, SN2, SN5, SN6. In this case, the control device In 102, the slitter knives SN1, SN2, SN5, and SN6 are arranged at the processing positions, and the remaining slitter knives SN0, SN3, and SN4 are arranged at the non-processing positions.

  Furthermore, as shown in FIG.7 (c), when performing two picking, the cardboard sheet | seat SH is cut | disconnected using slitter knife SN0, SN5, SN6. In this case, the control device 102 arranges the slitter knives SN0, SN5, and SN6 at the machining positions, and arranges the remaining slitter knives SN1, SN2, SN3, and SN4 at the non-machining positions. Moreover, as shown in FIG.7 (d), when performing one picking, the cardboard sheet | seat SH is cut | disconnected using slitter knife SN5, SN6. In this case, the control device 102 arranges the slitter knives SN5 and SN6 at the machining position, and arranges the remaining slitter knives SN0, SN1, SN2, SN3, and SN4 at the non-machining positions.

  Here, in the conventional technique (for example, the technique described in Patent Document 2), when 4 (4 picks) is applied as the maximum number of picks, it is necessary to perform the four picks. The minimum number of slitters 1, that is, five slitters 1 were applied. This means that if you take 4 picks at the maximum, if you apply 5 slitters 1, you can take not only 4 picks but also 3 picks, 2 picks, and 1 pick. Because it can. Specifically, when five slitters 1 are applied, if all five slitter knives SN are arranged at the processing position, four cuttings can be performed and one of the five slitter knives SN can be performed. If the slitter knife SN is appropriately moved in the width direction in addition to placing the part at the machining position and the rest at the non-machining position, it is possible to take 3 picks, 2 picks, and 1 pick. is there.

  In contrast, in the first embodiment, two slitters 1 are additionally used in addition to the five slitters 1 that are the minimum necessary for four-cuttering, and these are arranged in parallel on the same axis. 7 slitters 1 arranged in total are used (see FIG. 2 and the like). Specifically, in the first embodiment, as shown in FIGS. 7A and 7B, slitter knives SN0, SN3, SN4, SN5, SN6 (respectively slitters 1d, 1f, 1b, 1g, and 1a), and slitter knives SN1 and SN2 (each included in the slitters 1e and 1c) are additionally used as three-cutter application. .

  This is due to the problem of deterioration of the average defect rate due to the change of order between 4 and 3 picks as described in the section “Problems to be solved by the invention” above. This is because the length of the defective sheet generated at the time of changing the order between 4 and 3 picks is shortened, and the average defect rate relating to the cutting of the cardboard sheet SH is appropriately reduced. That is, in the first embodiment, the length of the defective sheet is reduced by reducing the distance (time) for moving the slitter 1 in the width direction of the corrugated cardboard sheet SH when changing the order between the four and three picks. We are trying to shorten it. Specifically, in the first embodiment, one of slitter knives SN0, SN3, SN4, SN5, and SN6 that is applied to 4-cutter when switching between 4-cutter and 3-catch by changing the order. The slitter knives SN0, SN3 and SN4 of the part and the slitter knives SN1 and SN2 applied to the three-cutter removal are moved up and down so as to be switched between the machining position and the non-machining position. The distance (time) for moving the knife SN in the width direction is shortened as much as possible to shorten the length of the defective sheet.

  In this case, if 4 picking is currently being performed, the slitter knives SN1 and SN2 in the non-processing position (when switching to 3 picking from the non-processing position in preparation for the next order change to 3 picking. If the one to be moved to the machining position is placed in advance in the position in the width direction assumed in the three-cutter, the slitter knife SN is moved in the width direction when switching from four-cutter to three-cutter by changing the order. The distance (time) can be shortened appropriately. In addition, if 3 picks are currently being performed, the slitter knives SN0, SN3, SN4 in the non-working position (non-working position when switching to 4 picking) in preparation for the next order change to 4 picking. If the slitter knives SN3 and SN4 are placed in advance in the width direction assumed in the 4-cuttering, when switching from 3-cuttering to 4-cuttering by changing the order, The distance (time) for moving the slitter knife SN in the width direction can be appropriately shortened.

  In addition, when applying 4 (4 picking) as the maximum picking number, the slitters 1d, 1f, 1b, 1g, and 1a including the slitter knives SN0, SN3, SN4, SN5, and SN6 used for the four picking, respectively, are used. The group corresponds to the “first slitter group” in the present invention, and the group of the slitters 1e and 1c including the slitter knives SN1 and SN2 used for three picking corresponds to the “second slitter group” in the present invention. .

  Next, with reference to FIG. 8, the control performed in the first embodiment of the present invention when switching from 4 to 3 picking up due to an order change will be specifically described. Here, for convenience of explanation, a case where the width of the cardboard sheet SH does not change before and after the order change is illustrated.

  As shown in FIG. 8, in the case where the control device 102 performs four picking, the slitter knives SN0, SN3, SN4, SN5, and SN6 are arranged at the processing positions, and the remaining slitter knives SN1 and SN2 are not used. The cardboard sheet SH is cut by the slitter knives SN0, SN3, SN4, SN5, and SN6. After that, when switching from 4 to 3 picking by changing the order, the control device 102 keeps the slitter knives SN5 and SN6 in the processing position and moves the slitter knives SN0, SN3 and SN4 from the processing position to the non-processing position. And the slitter knives SN1, SN2, SN5, SN6 are cut using the slitter knives SN1, SN2, SN5, SN6 by controlling the vertical movement mechanism so that the slitter knives SN1, SN2 are moved from the non-processing position to the processing position. To do.

  Although FIG. 8 shows the control performed when switching from 4 to 3 by changing the order, the same control is performed when switching from 3 to 4 by changing the order. Specifically, when switching from 3 picking to 4 picking, the control device 102 moves the slitter knives SN1 and SN2 from the processing position to the non-processing position while the slitter knives SN5 and SN6 are arranged at the processing position. Control the vertical movement mechanism so that the slitter knives SN0, SN3, SN4 are moved from the non-processing position to the processing position, and the cardboard sheet SH is cut using the slitter knives SN0, SN3, SN4, SN5, SN6. To do.

  When the control device 102 controls the vertical movement mechanism according to the change in the order of the number of picks as described above, the control device 102 also controls the width movement mechanism to move the slitter knife SN in the width direction. Try to move it. Specifically, the control device 102 moves the slitter knife SN in the width direction by an amount corresponding to the number of pickings and the picking width. In this case, the control device 102 has not only a slitter knife SN used for cutting the cardboard sheet SH but also a slitter knife SN not used for cutting the cardboard sheet SH (that is, the slitter knife SN to be kept on standby). Move in the direction.

  Next, with reference to FIG. 9, the flow of control (order change control) executed by the control device 102 at the time of order change in the first embodiment of the present invention will be described. FIG. 9 is a flowchart showing order change control according to the first embodiment of the present invention. In this flow, the control device 102 determines the slitter knife SN used for cutting the corrugated cardboard sheet SH at the time of changing the order of the number of picking (including changing the order of the picking width), and the width of each slitter knife SN. A process of determining the direction position (assuming that the position conforms to the definition described in FIG. 6) is performed. The flow is repeatedly executed by the control device 102 at a predetermined cycle.

Here, in FIG. 9, “T” indicates the number of picking, “W” indicates the picking width, and “P _SNX ” indicates the position in the width direction of a certain slitter knife SN ( "X" is one of 0-6). This “P _SNX ” corresponds to a command value for driving the width direction moving mechanism via the width direction servo drive unit 104 and the width direction moving servo motor 40 (see FIG. 5). In FIG. 9, “P _SNX ” with “*” indicates a slitter knife SN determined to be used for cutting the corrugated cardboard sheet SH. Accordingly, the slitter knife SN corresponding to “P _SNX ” marked with “*” has the vertical servo drive unit 106 and the vertical movement servo so that the slitter 1 including the slitter knife SN is arranged at the processing position. The vertical movement mechanism is controlled via the motor 29 (see FIG. 5). On the other hand, the slitter knife SN corresponding to “P _SNX ” not marked with “*” has the vertical servo drive unit 106 and the vertical direction so that the slitter 1 including the slitter knife SN is arranged at the non-processing position. The vertical movement mechanism is controlled via the movement servomotor 29 (see FIG. 5).

  Further, in FIG. 9, “Dm” indicates the minimum adjacent distance between adjacent slitters 1 (that is, the minimum width direction distance that the adjacent slitters 1 can approach). In the first embodiment, when switching to 4 or 3 picking, a combination of slitters 1 suitable for the number of picking after switching is applied to each slitter 1 according to the picking width. When the position in the width direction to be set is applied, when the interval between the adjacent slitters 1 is equal to or less than the minimum adjacent distance Dm, the combination of slitters 1 suitable for the number of picks is not used as it is (that is, another Use a combination of slitter 1). This is because a combination of slitters 1 in which the distance between adjacent slitters 1 is equal to or less than the minimum adjacent distance Dm cannot be used or is difficult to use due to mechanical limitations. Or it is not desirable to use. The minimum adjacent distance Dm is set based on, for example, the thickness in the width direction of a width direction moving mechanism (such as a yoke), the interference of the width direction moving servo motor 40, or the like.

  Below, the process performed in each step of FIG. 9 is demonstrated concretely.

  First, in step S101, the control device 102 determines the number T of the sheets to be picked from the corrugated cardboard sheet SH and the picking width W which is the length in the width direction of one sheet to be picked. Obtained from the general-purpose operation unit 110 and / or the higher-level production management device 112.

  Next, in step S102, the control device 102 determines whether or not there is an order change based on the number T and the width W acquired in step S101. As a result, when there is an order change (step S102: Yes), the process proceeds to step S103, and when there is no order change (step S102: No), the process ends.

  In step S103, the control device 102 determines whether or not the number of picks T is 1, in other words, determines whether or not one pick is performed. As a result, when the number of picks T is 1 (step S103: Yes), the process proceeds to step S104.

In step S104, the control device 102 determines the slitter knives SN5 and SN6 as the slitter knives SN used to cut the corrugated cardboard sheet SH to perform one picking (see P _SN5 * and P _SN6 *). . Further, the control device 102 determines the width direction position P _SN0 of the slitter knife SN0 as “0”, and sets the width direction positions P _SN1 and P _SN2 of the slitter knives SN1 and _SN2 to “W / 6” and “−W / determined in 6 ", slitter knife SN3, the width direction position P _SN3 of SN4, P _SN4 each" W / 4 "," - W / 4 to determine a "slitter knife SN5, SN6 widthwise position P _SN5 of P _{SN6 is determined} to be “W / 2” and “−W / 2”, respectively. Specifically, for the slitter knives SN5 and SN6 that are determined to be used for cutting the corrugated cardboard sheet SH, the control device 102 has a width direction position for realizing the picking width W acquired in step S101 by one picking. P _SN5 and P _SN6 are determined as “W / 2” and “−W / 2”, respectively. On the other hand, for the slitter knives SN0 to SN4 determined not to be used for cutting the corrugated cardboard sheet SH, the control device 102 secures the interval between the adjacent slitters 1 to be larger than the minimum adjacent distance Dm, The width direction positions P _{SN0 to} P _SN4 are determined so that the moving distance in the width direction becomes as small as possible (for the slitter knife SN0, P _{SN0 is set} to “0” in order to fix it to the reference position).

  On the other hand, as a result of the determination in step S103, if the number of picks T is not 1 (step S103: No), the process proceeds to step S105. In step S105, the control device 102 determines whether or not the number T of picking is 2, in other words, determines whether or not two picking is performed. As a result, if the number of picks T is 2 (step S105: Yes), the process proceeds to step S106.

In step S106, the control device 102 determines the slitter knives SN0, SN5, and SN6 as the slitter knives SN used to cut the corrugated cardboard sheet SH to perform two picking (P _SN0 *, P _SN5 * and See P _SN6 *). Further, the control device 102 determines the width direction position P _SN0 of the slitter knife SN0 as “0”, and sets the width direction positions P _SN1 and P _SN2 of the slitter knives SN1 and _SN2 to “W / 3” and “−W / determine the 3 ', slitter knife SN3, the widthwise position P _SN3, P _SN4 of SN4 each "W / 2", "- W / 2 to determine the" slitter knife SN5, the width direction position P _SN5 the SN6, P _SN6 is determined to be “W” and “−W”, respectively. Specifically, the control device 102 uses the trimming width W acquired in step S101 for the slitter knives SN0, SN5, and SN6 determined to be used for cutting the cardboard sheet SH, particularly for the slitter knives SN5 and SN6. The width direction positions P _SN5 and P _SN6 to be realized by two picking are determined as “W” and “−W”, respectively (for the slitter knife SN0, P _{SN0 is set} to “0” in order to fix it to the reference position). ). On the other hand, for the slitter knives SN1 to SN4 determined not to be used for cutting the corrugated cardboard sheet SH, the control device 102 secures the interval between the adjacent slitters 1 to be larger than the minimum adjacent distance Dm, The width direction positions P _{SN1 to} P _SN4 are determined so that the moving distance in the width direction becomes as small as possible.

  On the other hand, as a result of the determination in step S105, if the number of picks T is not 2 (step S105: No), the process proceeds to step S107. In step S107, the control device 102 determines whether or not the number T of picking is 3, in other words, determines whether or not three picking is performed. As a result, when the number of picks T is 3 (step S107: Yes), the process proceeds to step S108.

In step S108, the control apparatus 102 determines whether or not the minimum adjacent distance Dm is less than “W / 4” (Dm <W / 4). This “W / 4” is to use slitter knives SN1, SN2, SN5, SN6 suitable for performing three picking (see FIG. 7B), for each of the slitter knives SN0 to SN6, in the case of applying the widthwise position P _{SN 0} to P _SN6 be set in accordance with the Ding-up width W, slitter 1c corresponding to adjacent slitter knife SN2, SN4, distance 1b, the and the adjacent slitter knives SN1, SN3 The distance between the corresponding slitters 1e and 1f (SN2 and SN1, and SN4 and SN3 are the same with SN0 in between, and the two distances are the same). Therefore, when the slitter knives SN1, SN2, SN5, and SN6 suitable for performing the three-cutter are applied, the determination in step S108 is the distance between the slitters 1c and 1b corresponding to the adjacent slitter knives SN2 and SN4 and the adjacent slitter. This corresponds to determining whether or not the distance between the slitters 1e and 1f corresponding to the knives SN1 and SN3 is equal to or smaller than the minimum adjacent distance Dm (in other words, whether the distance is larger than the minimum adjacent distance Dm).

  As a result of the determination in step S108, when the minimum adjacent distance Dm is less than “W / 4” (step S108: Yes), the process proceeds to step S109. In this case, even if the slitter knives SN1, SN2, SN5, and SN6 that are suitable for carrying out three picking are applied, the distance (W / 4) between the slitters 1c and 1b corresponding to the adjacent slitter knives SN2 and SN4. And the distance (W / 4) between the slitters 1e and 1f corresponding to the adjacent slitter knives SN1 and SN3 does not become the minimum adjacent distance Dm or less, that is, becomes larger than the minimum adjacent distance Dm.

Accordingly, in step S109, the control device 102 determines the slitter knives SN1, SN2, SN5, and SN6 as the slitter knives SN used to cut the cardboard sheet SH to perform the three picking (P _SN1 *, P _SN2 *, P _SN5 * and P _SN6 *). Further, the control device 102 determines the width direction position P _SN0 of the slitter knife SN0 as “0”, and sets the width direction positions P _SN1 and P _SN2 of the slitter knives SN1 and _SN2 to “W / 2” and “−W /”, respectively. determine the 2 ', slitter knife SN3, the width direction position P _SN3 of SN4, P _SN4 respectively "3W / 4", "- 3W / 4 to determine a" slitter knife SN5, SN6 widthwise position P _SN5 of P _{SN6 is determined} to be “3W / 2” and “−3W / 2”, respectively. Specifically, for the slitter knives SN1, SN2, SN5, and SN6 determined to be used for cutting the corrugated cardboard sheet SH, the control device 102 realizes the trimming width W acquired in step S101 by three trimmings. _{Are determined} to be “W / 2”, “−W / 2”, “3W / 2”, and “−3W / 2”, respectively, as positions P _SN1 , P _SN2 , P _SN5 , and P _SN6 . On the other hand, for the slitter knives SN0, SN3, and SN4 determined not to be used for cutting the corrugated cardboard sheet SH, the control device 102 secures the interval between the adjacent slitters 1 to be larger than the minimum adjacent distance Dm, and the next order. The width direction positions P _SN0 , P _SN3 , and P _SN4 are determined so that the moving distance in the width direction becomes as small as possible in the change (for the slitter knife SN0, P _{SN0 is set} to “0” in order to fix it to the reference position).

  On the other hand, if the result of determination in step S108 is that the minimum adjacent distance Dm is not less than "W / 4" (step S108: No), that is, if the minimum adjacent distance Dm is greater than or equal to "W / 4", the process proceeds to step S110. . In this case, when the slitter knives SN1, SN2, SN5, and SN6 that are suitable for performing three picking are applied, the distance (W / 4) of the slitters 1c and 1b corresponding to the adjacent slitter knives SN2 and SN4 and the adjacent slitter knives. The distances (W / 4) between the slitters 1e and 1f corresponding to the slitter knives SN1 and SN3 are equal to or smaller than the minimum adjacent distance Dm.

Therefore, in step S110, the controller 102 uses the slitter knife SN1 as the slitter knife SN used for cutting the corrugated cardboard sheet SH to perform the three-digit picking, not the slitter knife SN1, SN2, SN5, SN6 described above. (see _{P SN1 *, P SN2 *,} P SN3 * and P _SN4 *) to SN2, SN3, SN4 to determine. That is, the controller 102 applies the slitter knives SN3 and SN4 in place of the slitter knives SN5 and SN6 in the slitter knives SN1, SN2, SN5, and SN6. Further, the control device 102 determines the width direction position P _SN0 of the slitter knife SN0 as “0”, and sets the width direction positions P _SN1 and P _SN2 of the slitter knives SN1 and _SN2 to “W / 2” and “−W /”, respectively. determine the 2 ', slitter knife SN3, the widthwise position P _SN3, P _SN4 of SN4 are "3W / 2", "- 3W / 2 to determine the" slitter knife SN5, the width direction position P _SN5 the SN6, P _{SN6 is determined} to be “3W / 2 + Dm” and “−3W / 2−Dm”, respectively. Specifically, for the slitter knives SN1, SN2, SN3, and SN4 determined to be used for cutting the corrugated cardboard sheet SH, the control device 102 realizes the trimming width W acquired in step S101 by three trimmings. _{Are determined} to be “W / 2”, “−W / 2”, “3W / 2”, and “ _−3W / 2”, respectively, as positions P _SN1 , P _SN2 , P _SN3 , and P _SN4 . On the other hand, for the slitter knives SN0, SN5, and SN6 determined not to be used for cutting the corrugated cardboard sheet SH, the control device 102 secures the interval between the adjacent slitters 1 to be larger than the minimum adjacent distance Dm, and the next order. The width direction positions P _SN0 , P _SN5 , and P _SN6 are determined so that the moving distance in the width direction becomes as small as possible in the change (for the slitter knife SN0, P _{SN0 is set} to “0” to fix the reference position). In particular, for the slitter knives SN5 and SN6, the control device 102 sets the widths of “3W / 2 + Dm” and “−3W / 2−Dm”, which are separated from the position of the slitter knives SN3 and SN4 by the minimum adjacent distance Dm, respectively. The direction positions P _SN5 and P _SN6 are determined.

  On the other hand, as a result of the determination in step S107, if the number T of picks is not 3 (step S107: No), the process proceeds to step S111. This corresponds to a case where the number of picks T is four.

In step S111, the control apparatus 102 determines whether or not the minimum adjacent distance Dm is less than “W / 2” (Dm <W / 2). This “W / 2” is applied to each of the slitter knives SN0 to SN6 in order to apply the slitter knives SN0, SN3, SN4, SN5, and SN6 suitable for performing four picking (see FIG. 7A). Te, when applying the widthwise position P _{SN 0} to P _SN6 be set in accordance with the Ding-up width W, slitter 1c corresponding to adjacent slitter knife SN2, SN4, 1b distance, and adjacent slitter knives SN1, The distance between the slitters 1e and 1f corresponding to SN3 (SN2 and SN1, and SN4 and SN3 are the objects with SN0 in between, respectively, so these two distances are the same). Therefore, when the slitter knives SN0, SN3, SN4, SN5, and SN6 suitable for performing the 4-cutter are used, the determination in step S111 is performed by using the slitters 1c and 1b corresponding to the adjacent slitter knives SN2 and SN4 and the adjacent distances. This corresponds to determining whether or not the distance between the slitters 1e and 1f corresponding to the slitter knives SN1 and SN3 does not become the minimum adjacent distance Dm or less (in other words, whether or not the distance is larger than the minimum adjacent distance Dm).
The above-mentioned distance between the slitters 1c and 1b corresponding to the adjacent slitter knives SN2 and SN4 and the distance between the slitters 1e and 1f corresponding to the adjacent slitter knives SN1 and SN3 are respectively the adjacent slitter knives SN2 and SN0. Is the same as the distance between the slitters 1c and 1d corresponding to the adjacent slitter knives SN0 and SN1, and “W / 2” used in the determination in step S111 is set as the latter distance. It may be handled (the same shall apply hereinafter).

  As a result of the determination in step S111, when the minimum adjacent distance Dm is less than “W / 2” (step S111: Yes), the process proceeds to step S112. In this case, even when the slitter knives SN0, SN3, SN4, SN5, and SN6 suitable for performing the four picking are applied, the distance (W / W) between the slitters 1c and 1b corresponding to the adjacent slitter knives SN2 and SN4. 2) and the distance (W / 2) between the slitters 1e and 1f corresponding to the adjacent slitter knives SN1 and SN3 are not less than the minimum adjacent distance Dm, that is, larger than the minimum adjacent distance Dm.

Therefore, in step S112, the control device 102 determines the slitter knives SN0, SN3, SN4, SN5, and SN6 as the slitter knives SN used to cut the corrugated cardboard sheet SH to perform the four-choice (P _SN0 * see _{P SN3 *, P SN4 *,} P SN5 * and P _SN6 *). Further, the control device 102 determines the width direction position P _SN0 of the slitter knife SN0 as “0”, and sets the width direction positions P _SN1 and P _SN2 of the slitter knives SN1 and _SN2 to “W / 2” and “−W /”, respectively. determine the 2 ', slitter knife SN3, the width direction position P _SN3 of SN4, P _SN4 each "W", "- W decided to" slitter knife SN5, the width direction position P _SN5 of SN6, the P _SN6 respectively “2W” and “−2W” are determined. Specifically, the controller 102 determines the slitter knives SN0, SN3, SN4, SN5, and SN6 that are determined to be used for cutting the corrugated cardboard sheet SH, particularly for the slitter knives SN3, SN4, SN5, and SN6 in step S101. as widthwise position _{P SN3, P SN4, P SN5} , P SN6 for realizing the obtained Ding-up width W by 4 chome up, each "W", "- W", "2W", "- 2W" determined in (to "0" and P _{SN 0} to be fixed to a reference position for the slitter knife SN 0). On the other hand, for the slitter knives SN1 and SN2 that are determined not to be used for cutting the corrugated cardboard sheet SH, the control device 102 ensures that the interval between the adjacent slitters 1 is larger than the minimum adjacent distance Dm, and the next order change. The width direction positions P _SN1 and P _SN2 are determined so that the movement distance in the width direction becomes as small as possible.

  On the other hand, if the result of determination in step S111 is that the minimum adjacent distance Dm is not less than “W / 2” (step S111: No), that is, if the minimum adjacent distance Dm is greater than or equal to “W / 2”, the process proceeds to step S113. . In this case, when the slitter knives SN0, SN3, SN4, SN5, and SN6 suitable for performing the four-cutter are applied, the distance (W) and the adjacent slitters 1c and 1b corresponding to the adjacent slitter knives SN2 and SN4 The distances (W) between the slitters 1e and 1f corresponding to the slitter knives SN1 and SN3 are less than twice the minimum adjacent distance Dm.

Therefore, in step S113, the controller 102 does not use the slitter knives SN0, SN3, SN4, SN5, and SN6 as the slitter knife SN used to cut the corrugated cardboard sheet SH in order to perform four picking. The knives SN0, SN1, SN2, SN3, SN4 are determined (see P _SN0 *, P _SN1 *, P _SN2 *, P _SN3 * and P _SN4 *). That is, the control device 102 applies the slitter knives SN1 and SN2 instead of the slitter knives SN5 and SN6 in the slitter knives SN0, SN3, SN4, SN5, and SN6. Further, the control device 102 determines the width direction position P _SN0 of the slitter knife SN0 as “0”, and determines the width direction positions P _SN1 and P _SN2 of the slitter knives SN1 and SN2 as “W” and “−W”, respectively. and, slitter knife SN3, the width direction position P _SN3 of SN4, P _SN4 each "2W", - to determine the "2W" slitter knife SN5, the width direction position P _SN5 of SN6, the P _SN6 are "2W + Dm" It determines to "-2W-Dm". Specifically, the controller 102 determines the slitter knives SN0, SN1, SN2, SN3, and SN4 that are determined to be used for cutting the corrugated cardboard sheet SH, particularly the slitter knives SN1, SN2, SN3, and SN4 in step S101. As the width direction positions P _SN1 , P _SN2 , P _SN3 , P _SN4 for _{realizing the acquired trimming} width W by four _trimmings , “W”, “−W”, “2W”, “ _−2W ”, respectively. determined in (to "0" and P _{SN 0} to be fixed to a reference position for the slitter knife SN 0). On the other hand, for the slitter knives SN5 and SN6 determined not to be used for cutting the corrugated cardboard sheet SH, the control device 102 secures the interval between the adjacent slitters 1 to be larger than the minimum adjacent distance Dm, The width direction positions P _SN5 and P _SN6 are determined so that the movement distance in the width direction becomes as small as possible. Specifically, the control unit 102, a widthwise position P _SN5, P _SN6 the slitter knife SN5, SN6, respectively, is separated by a minimum adjacent distance Dm from the position of the slitter knife SN3, SN4 "2W + Dm", "- 2W- Dm ".

After the flow of FIG. 9 ends, the control device 102 arranges the slitter knife SN determined to be used for cutting the corrugated cardboard sheet SH in any of steps S104, S106, S109, S110, S112, and S113 at the processing position. In addition, the slitter knife SN, which is determined not to be used for cutting the corrugated board sheet SH in any of these steps, controls the vertical movement mechanism via the vertical servo drive unit 106 and the vertical movement servomotor 29. The vertical movement mechanism is controlled via the vertical servo drive unit 106 and the vertical movement servo motor 29 so as to be disposed at the non-processing position. In addition, the control device 102 moves the width direction servo drive unit 104 so as to move each slitter knife SN to the width direction positions P _{SN0 to} P _SN6 determined in any one of steps S104, S106, S109, S110, S112, and S113. And the width direction moving mechanism is controlled via the servo motor 40 for width direction movement.

  According to the first embodiment of the present invention described above, in addition to the five slitters 1 (slitters 1a, 1b, 1d, 1f, and 1g) that are the minimum required to perform four as the maximum number of picks. In addition, when two slitters 1 (slitters 1c, 1e) are additionally used as three-cutter picking, and when switching between four-cutter picking and three-cutter picking by changing the order, The slitters 1b, 1d, and 1f that are part of the five slitters 1 that are applied to the cutting and the two slitters 1c and 1e that are applied to the 3-cutter are switched between the processing position and the non-processing position. Thus, the distance (time) for moving the slitter 1 in the width direction at the time of switching can be appropriately shortened. Therefore, according to the first embodiment, it is possible to reduce the length of the defective sheet that occurs when the order is changed between 4 and 3 picking, and to appropriately set the average defective rate related to the cutting of the cardboard sheet SH. It is possible to reduce it. In this case, according to the first embodiment, a configuration in which two slitter devices are arranged in series along the supply direction of the corrugated cardboard sheet SH and the slitter device that is operated when changing the order is switched (for example, described in Patent Document 1). It is possible to realize an average defect rate equivalent to that of such a technology.

  As another comparative example, two slitter devices are arranged in series along the supply direction of the cardboard sheet SH, and the slitter device to be operated is not switched. A configuration in which the SH is cut, that is, a configuration in which the cardboard sheet SH is cut twice by two slitter devices is conceivable. However, the configuration of such a comparative example has the following problems, and it can be said that it is not a practical configuration in the first place. First, the configuration of the comparative example has a problem that the accuracy with respect to the cutting of the corrugated cardboard sheet SH is low. This is because the sheet cut at the first time does not advance straight but advances at an angle, and the accuracy at the second cutting is lowered. Next, in the configuration of the comparative example, there is a problem that it is difficult to properly discharge unnecessary sheets (trims) at both ends of the corrugated cardboard sheet SH generated by cutting the corrugated cardboard sheet SH from the duct. Specifically, in order to properly discharge the trim from the duct, it is desirable to provide the duct near the slitter device. However, in the configuration of the comparative example, the duct is provided near the subsequent slitter device. Since it is located away from the front slitter device, it is difficult to properly discharge the trim generated in the front slitter device from the duct. In some cases, the trim must be removed manually.

  In consideration of such problems in the comparative example, in the first embodiment, in addition to the five slitters 1 that are necessary to perform the four-cutter, two slitters 1 are applied to the three-cutter. When these are used additionally, these seven slitters 1 are arranged in parallel on the same axis so as to cut the cardboard sheet SH by only one step (second embodiment to be described later). The form is the same).

(Second Embodiment)
Next, the control according to the second embodiment of the present invention will be described. Similarly to the control according to the first embodiment described above, the control according to the second embodiment also corresponds to seven slitters 1a to 1g (seven slitter knives SN0 to SN6) as shown in FIGS. ) Is executed by the control device 102 of the slitter device 202. However, the control according to the second embodiment relates to the content of control performed when changing the order between 5 and 4 picks when 5 (5 picks) is applied as the maximum number of picks. Thus, the control is different from the control according to the first embodiment.

  Referring to FIG. 10, in the second embodiment of the present invention, the slitter 1 of the slitter 1 used for cutting the corrugated cardboard sheet SH when performing five picking, four picking, three picking, two picking, and one picking. The knife SN will be described. The definitions of the slitter knives SN0 to SN6 are the same as those described with reference to FIG.

  FIGS. 10 (a), (b), (c), (d), and (e) are used when 5 picking, 4 picking, 3 picking, 2 picking, and 1 picking, respectively. A slitter knife SN is schematically shown. As shown to Fig.10 (a), in 2nd Embodiment, when the control apparatus 102 performs 5 picking, using the slitter knife SN1, SN2, SN3, SN4, SN5, SN6, cardboard sheet SH is used. Try to cut. In this case, the control device 102 arranges the slitter knives SN1, SN2, SN3, SN4, SN5, and SN6 at the machining position, and arranges the remaining slitter knives SN0 at the non-machining position. On the other hand, the contents of control in the case of performing four picking, three picking, two picking, and one picking shown in FIGS. 10B to 10E are the same as in the first embodiment (FIG. 7). (See (a) to (d)), and the description thereof is omitted here.

  Here, when 5 (5 picks) is applied as the maximum number of picks, the minimum number of slitters 1 necessary for the five picks, that is, six slitters 1 are sufficient. However, in the second embodiment, in addition to the six slitters 1 that are applied to the 5-cutter, one slitter 1 is additionally used as an application to the 4-cutter. That is, in the second embodiment, as shown in FIGS. 10A and 10B, slitter knives SN1, SN2, SN3, SN4, SN5, and SN6 (respectively slitters 1e, 1c, and 1f, respectively) applied to five picks. 1b, 1g, and 1a), and a slitter knife SN0 (included in the slitter 1d) is additionally used as one that is applied to four picks.

  This is due to the problem of deterioration of the average defect rate due to the change of order between 5 and 4 orders as described in the section “Problems to be solved by the invention” above. This is because the length of the defective sheet generated when changing the order between 5 and 4 picks is shortened, and the average defect rate relating to the cutting of the cardboard sheet SH is appropriately reduced. That is, in the second embodiment, the distance (time) for moving the slitter 1 in the width direction of the corrugated cardboard sheet SH when changing the order between 5 and 4 picks is reduced. We are trying to shorten it. Specifically, in the second embodiment, among the slitter knives SN1, SN2, SN3, SN4, SN5, and SN6 that are applied to the 5-cutter when switching between 5-catch and 4-catch by changing the order. The slitter knives SN1 and SN2 and the slitter knives SN0 to be applied to the four picking are moved in the vertical direction so as to be switched between the processing position and the non-processing position. The distance (time) for moving the sheet in the width direction is shortened as much as possible to shorten the length of the defective sheet.

  When 5 (5 picks) is applied as the maximum number of picks, the slitters 1e, 1c, 1f, 1b, including slitter knives SN1, SN2, SN3, SN4, SN5, and SN6 used for picking up five pieces, respectively. The groups 1g and 1a correspond to the “first slitter group” in the present invention, and the slitter 1d including the slitter knife SN0 used for four-cuttering corresponds to the “second slitter group” in the present invention.

  Next, with reference to FIG. 11, in the second embodiment of the present invention, the control performed when switching from 5 to 4 by changing the order will be specifically described. Here, for convenience of explanation, a case where the width of the cardboard sheet SH does not change before and after the order change is illustrated.

  As shown in FIG. 11, in the case of performing five picks, the control device 102 arranges the slitter knives SN1, SN2, SN3, SN4, SN5, and SN6 at the processing position, and disposes the remaining slitter knives SN0. It arrange | positions in a process position and cuts the cardboard sheet | seat SH by slitter knife SN1, SN2, SN3, SN4, SN5, SN6. Thereafter, when switching from 5 to 4 picking due to an order change, the control device 102 keeps the slitter knives SN3, SN4, SN5, and SN6 in the processing position, and the slitter knives SN1 and SN2 from the processing position. The vertical movement mechanism is controlled so that the slitter knife SN0 is moved to the machining position from the non-machining position and the slitter knife SN0, SN3, SN4, SN5, SN6 is used. To cut off.

  Although FIG. 11 shows the control performed when switching from 5 to 4 by changing the order, similar control is also performed when switching from 4 to 5 by changing the order. Specifically, when switching from 4 to 5 picking, the control device 102 keeps the slitter knife SN3, SN4, SN5, and SN6 at the processing position and moves the slitter knife SN0 from the processing position to the non-processing position. The slitter knives SN1, SN2, SN3, SN4, SN5, SN6 are used to control the vertical movement mechanism so that the slitter knives SN1, SN2 are moved from the non-processing position to the processing position. The sheet SH is cut.

  When the control device 102 controls the vertical movement mechanism according to the change in the order of the number of picks as described above, the control device 102 also controls the width movement mechanism to move the slitter knife SN in the width direction. Try to move it. Specifically, the control device 102 moves the slitter knife SN in the width direction by an amount corresponding to the number of pickings and the picking width. In this case, the control device 102 has not only a slitter knife SN used for cutting the cardboard sheet SH but also a slitter knife SN not used for cutting the cardboard sheet SH (that is, the slitter knife SN to be kept on standby). Move in the direction.

  Next, with reference to FIG. 12, the flow of control (order change control) executed by the control apparatus 102 when an order is changed in the second embodiment of the present invention will be described. FIG. 12 is a flowchart showing order change control according to the second embodiment of the present invention. In this flow, the control device 102 determines the slitter knife SN used for cutting the corrugated cardboard sheet SH at the time of changing the order of the number of picking (including changing the order of the picking width), and the width of each slitter knife SN. A process of determining the direction position (assuming that the position conforms to the definition described in FIG. 6) is performed. The flow is repeatedly executed by the control device 102 at a predetermined cycle. The definitions of various symbols shown in FIG. 12 are the same as those in FIG.

  First, in step S201, the control device 102 sets the number T of the sheets to be picked from the corrugated cardboard sheet SH and the picking width W which is the length in the width direction of one sheet to be picked. Obtained from the general-purpose operation unit 110 and / or the higher-level production management device 112.

  Next, in step S202, the control device 102 determines whether or not there is an order change based on the number T and the width W acquired in step S201. As a result, when there is an order change (step S202: Yes), the process proceeds to step S203, and when there is no order change (step S202: No), the process ends.

  In step S203, the control device 102 determines whether or not the number of picks T is 1, in other words, determines whether or not one pick is performed. As a result, when the number of picks T is 1 (step S203: Yes), the process proceeds to step S204.

In step S204, the control device 102 determines the slitter knives SN5 and SN6 as the slitter knives SN used to cut the corrugated cardboard sheet SH to perform one picking (see P _SN5 * and P _SN6 *). . Further, the control device 102 determines the width direction position P _SN0 of the slitter knife SN0 as “0”, and sets the width direction positions P _SN1 and P _SN2 of the slitter knives SN1 and _SN2 to “W / 10” and “−W /”, respectively. determine the 10 "slitter knife SN3, the widthwise position P _SN3, P _SN4 of SN4 are" 3W / 10 "," - determined to 3W / 10 ", slitter knife SN5, the width of SN6 direction position P _SN5, P _{SN6 is determined} to be “W / 2” and “−W / 2”, respectively. Specifically, with respect to the slitter knives SN5 and SN6 determined to be used for cutting the corrugated cardboard sheet SH, the control device 102 has a width direction position for realizing the picking width W acquired in step S201 by one picking. P _SN5 and P _SN6 are determined as “W / 2” and “−W / 2”, respectively. On the other hand, for the slitter knives SN0 to SN4 determined not to be used for cutting the corrugated cardboard sheet SH, the control device 102 has a width direction position P _{SN0 to} P _SN such that the movement distance in the width direction becomes as small as possible in the next order change. determining _SN4 (to "0" and P _{SN 0} to be fixed to a reference position for the slitter knife SN 0).
The width direction position P _SN1 to P _SN4 of slitter knife SN1~SN4 determined in step S204 described above, the width direction position P _SN1 to P _SN4 of slitter knife SN1~SN4 determined in step S104 of FIG. 9 The difference is that the maximum number of pages to be applied is different between the first embodiment and the second embodiment, so the position in the width direction for making the moving distance in the width direction as small as possible changes in the next order change. Because it comes. This also applies to the position in the width direction determined in the subsequent steps.

  On the other hand, as a result of the determination in step S203, if the number T of picks is not 1 (step S203: No), the process proceeds to step S205. In step S205, the control device 102 determines whether or not the number T of picking is 2, in other words, determines whether or not two picking is performed. As a result, when the number of picks T is 2 (step S205: Yes), the process proceeds to step S206.

In step S206, the controller 102 determines the slitter knives SN0, SN5, and SN6 as the slitter knives SN used to cut the corrugated cardboard sheet SH in order to perform two picking (P _SN0 *, P _SN5 * and See P _SN6 *). Further, the control device 102 determines the width direction position P _SN0 of the slitter knife SN0 to “0”, and sets the width direction positions P _SN1 and P _SN2 of the slitter knives SN1 and _SN2 to “W / 5” and “−W / determine the 5 'slitter knife SN3, the widthwise position P _SN3, P _SN4 of SN4 are "3W / 5", "- 3W / 5 was determined" slitter knife SN5, SN6 widthwise position P _SN5 of P _SN6 is determined to be “W” and “−W”, respectively. Specifically, the control device 102 uses the cutting width W acquired in step S201 for the slitter knives SN0, SN5, and SN6 determined to be used for cutting the cardboard sheet SH, particularly for the slitter knives SN5 and SN6. The width direction positions P _SN5 and P _SN6 to be realized by two picking are determined as “W” and “−W”, respectively (for the slitter knife SN0, P _{SN0 is set} to “0” in order to fix it to the reference position). ). On the other hand, with respect to the slitter knives SN1 to SN4 determined not to be used for cutting the corrugated cardboard sheet SH, the control device 102 has width direction positions P _{SN1 to} P _SN such that the movement distance in the width direction becomes as small as possible in the next order change. _{Determine SN4} .

  On the other hand, as a result of the determination in step S205, if the number of picks T is not 2 (step S205: No), the process proceeds to step S207. In step S207, the control device 102 determines whether or not the number T of picking is 3, in other words, determines whether or not three picking is performed. As a result, when the number of picks T is 3 (step S207: Yes), the process proceeds to step S208.

In step S208, the control device 102 determines the slitter knives SN1, SN2, SN5, and SN6 as the slitter knives SN used for cutting the corrugated cardboard sheet SH to perform the three picking (P _SN1 *, P _SN2 *, See P _SN5 * and P _SN6 *). Further, the control device 102 determines the width direction position P _SN0 of the slitter knife SN0 as “0”, and sets the width direction positions P _SN1 and P _SN2 of the slitter knives SN1 and _SN2 to “W / 2” and “−W /”, respectively. determine the 2 ', slitter knife SN3, the widthwise position P _SN3, P _SN4 of SN4 are "9W / 10", "- determined to 9W / 10", slitter knife SN5, the width of SN6 direction position P _SN5, P _{SN6 is determined} to be “3W / 2” and “−3W / 2”, respectively. Specifically, for the slitter knives SN1, SN2, SN5, and SN6 determined to be used for cutting the corrugated cardboard sheet SH, the control device 102 realizes the trimming width W acquired in step S201 by three trimmings. _{Are determined} to be “W / 2”, “−W / 2”, “3W / 2”, and “−3W / 2”, respectively, as positions P _SN1 , P _SN2 , P _SN5 , and P _SN6 . On the other hand, for the slitter knives SN0, SN3, and SN4 that the control device 102 has decided not to use for cutting the corrugated cardboard sheet SH, the width direction position P _{SN0 at which} the movement distance in the width direction becomes as small as possible in the next order change. , P _SN3 and P _SN4 are determined (for the slitter knife SN0, P _{SN0 is set} to “0” in order to fix it to the reference position).

  On the other hand, if the result of determination in step S207 is that the number T of picks is not 3 (step S207: No), the process proceeds to step S209. In step S209, the control device 102 determines whether or not the number of picks T is 4, in other words, determines whether or not four picks are performed. As a result, when the number of picks T is 4 (step S209: Yes), the process proceeds to step S210.

In step S210, the control device 102 determines the slitter knives SN0, SN3, SN4, SN5, and SN6 as the slitter knives SN used to cut the corrugated cardboard sheet SH to perform four-choice (P _SN0 *, see the _{P SN3 *, P SN4 *,} P SN5 * and P _SN6 *). Further, the control device 102 determines the width direction position P _SN0 of the slitter knife SN0 as “0”, and sets the width direction positions P _SN1 and P _SN2 of the slitter knives SN1 and _SN2 to “2W / 5” and “−2W / determine the 5 'slitter knife SN3, the width direction position P _SN3 of SN4, P _SN4 each "W", "- W decided to" slitter knife SN5, the width direction position P _SN5 of SN6, the P _SN6 respectively “2W” and “−2W” are determined. Specifically, the control device 102 determines the slitter knives SN0, SN3, SN4, SN5, and SN6 that are determined to be used for cutting the corrugated cardboard sheet SH, particularly for the slitter knives SN3, SN4, SN5, and SN6 in step S201. as widthwise position _{P SN3, P SN4, P SN5} , P SN6 for realizing the obtained Ding-up width W by 4 chome up, each "W", "- W", "2W", "- 2W" determined in (to "0" and P _{SN 0} to be fixed to a reference position for the slitter knife SN 0). On the other hand, for the slitter knives SN1 and SN2 determined not to be used for cutting the corrugated cardboard sheet SH, the control device 102 has a width direction position P _SN1 , P such that the movement distance in the width direction becomes as small as possible in the next order change. Determine _SN2 .

  On the other hand, as a result of the determination in step S209, if the number T of picks is not 4 (step S209: No), the process proceeds to step S211. This case corresponds to the case where the number of picks T is 5.

In step S211, the control device 102 determines the slitter knives SN1, SN2, SN3, SN4, SN5, and SN6 as the slitter knives SN used to cut the corrugated cardboard sheet SH to perform the five-digit picking (P _SN1 * see _{P SN2 *, P SN3 *,} P SN4 *, P SN5 * and P _SN6 *). Further, the control device 102 determines the width direction position P _SN0 of the slitter knife SN0 as “0”, and sets the width direction positions P _SN1 and P _SN2 of the slitter knives SN1 and _SN2 to “W / 2” and “−W /”, respectively. determine the 2 ', slitter knife SN3, the widthwise position P _SN3, P _SN4 of SN4 are "3W / 2", "- 3W / 2 to determine the" slitter knife SN5, the width direction position P _SN5 the SN6, P _{SN6 is determined} to be “5W / 2” and “−5W / 2”, respectively. Specifically, for the slitter knives SN1, SN2, SN3, SN4, SN5, and SN6 that the control device 102 has decided to use for cutting the corrugated cardboard sheet SH, the control device 102 takes the five picking widths W acquired in step S201. as widthwise position _{P SN1, P SN2, P SN3} , P SN4, P SN5 and P _SN6 to realize by, respectively, "W / 2", "- W / 2", "3W / 2", "- 3W / 2 "," 5W / 2 ", and" -5W / 2 ". On the other hand, the control device 102 sets the width direction position P _SN0 to “0” in order to fix the slitter knife SN0 determined not to be used for cutting the corrugated cardboard sheet SH to the reference position.

After the flow of FIG. 12 ends, the control device 102 arranges the slitter knife SN determined to be used for cutting the corrugated cardboard sheet SH in any of steps S204, S206, S208, S210, and S211 at the processing position. The vertical movement mechanism is controlled via the vertical servo drive unit 106 and the vertical movement servomotor 29, and the slitter knife SN determined not to be used for cutting the cardboard sheet SH in any of these steps is not used. The vertical movement mechanism is controlled via the vertical servo drive unit 106 and the vertical movement servomotor 29 so as to be arranged at the processing position. Further, the control device 102 moves the width direction servo drive unit 104 and the width so as to move the slitter knives SN to the width direction positions P _{SN0 to} P _SN6 determined in any one of steps S204, S206, S208, S210, and S211. The width direction moving mechanism is controlled via the direction moving servo motor 40.

  According to the second embodiment of the present invention described above, the six slitters 1 (slitters 1a, 1b, 1c, 1e, 1f, and 1g) that are the minimum required to perform five as the maximum number. In addition to this, when one slitter 1 (slitter 1d) is additionally used as an application to four picking, and when switching between five picking and four picking by changing the order, Up and down direction so that some slitters 1c and 1e of six slitters 1 applied to the cutting and one slitter 1d applied to the four-cutter cutting are exchanged between the processing position and the non-processing position. Therefore, the distance (time) for moving the slitter 1 in the width direction at the time of switching can be appropriately shortened. Therefore, according to the second embodiment, it is possible to reduce the length of the defective sheet generated when changing the order between 5 and 4 picks, and to appropriately set the average defective rate regarding the cutting of the corrugated cardboard sheet SH. It is possible to reduce it. In this case, according to the second embodiment, a configuration in which two slitter devices are arranged in series along the supply direction of the corrugated cardboard sheet SH and the slitter device that is operated when changing the order is switched (for example, described in Patent Document 1). It is possible to realize an average defect rate equivalent to that of such a technology.

  Further, according to the second embodiment, as described above, by using a total of seven slitters 1 including one slitter 1 added to the six slitters 1 that are the minimum necessary to perform the five picking, Compared with a configuration using only six slitters 1, the length of a defective sheet that occurs when changing the order between five and two picks can be appropriately shortened. Specifically, in the configuration using only six slitters 1, the distance (time) for moving the slitter 1 in the width direction is relatively long when changing the order between five and two pickers. As in the second embodiment, the slitters 1b, 1c, 1e, 1f and the slitter 1d are moved in the vertical direction so as to be interchanged between the machining position and the non-machining position using seven slitters 1 in total. Thus, the distance (time) for moving the slitter 1 in the width direction at the time of such an order change can be appropriately shortened. Therefore, according to the second embodiment, it is possible to reduce the length of the defective sheet that occurs when changing the order between 5 and 2 picking, and to further reduce the average defective rate related to the cutting of the cardboard sheet SH. It can be effectively reduced.

  In addition, when the width | variety of the corrugated cardboard sheet SH is below a predetermined value, it is assumed that there is a low possibility of performing five picking, and the second embodiment that assumes five picking as the maximum number of picking is not applied. It is preferable to apply the first embodiment in which four picks are assumed as the maximum number of picks. That is, in this case, it is preferable to execute the flow shown in FIG. 9 instead of executing the flow shown in FIG.

<Modification>
In the above-described embodiment, the configuration in which 4 (4 picks) and 5 (5 picks) are applied as the maximum number of picks has been shown, but the application of the present invention is not limited to this. The present invention can also be applied to a configuration in which the maximum number of pages is 6 or more (for example, a configuration in which 6 pages are applied). Even in that case, the first slitter group including N + 1 slitters 1 for performing a plurality of slitters 1 for the maximum number N (here, N is 6 or more), and the number of the slitters. When the number of pick-ups is switched from N to N-1 with a second slitter group including one or more slitters 1 for picking up N-1, the first slitter group includes The vertical movement mechanism may be controlled so that a part of the slitters 1 are arranged at the non-machining position and the second slitter group is arranged at the machining position. When switching from N to N, the vertical movement mechanism is controlled so that the second slitter group is arranged at the non-machining position and a part of the slitters 1 in the first slitter group are arranged at the machining position. That's fine.

1 (1a to 1g) Slitter 2 Upper slitter 10 Slitter receiving member 11 Lower slitter 22 Slitter knife 29 Servo motor for moving in the vertical direction 40 Servo motor for moving in the vertical direction 52 Scorer 100 Slitter scorer device 102 Control device 104 Width direction servo drive unit 106 Vertical servo drive unit 201 Scorer device 202 Slitter device SH Corrugated sheet SN0 to SN6 Slitter knife

Claims (6)

A slitter device for cutting a cardboard sheet continuously supplied along a supply line,
A plurality of slitters each having a slitter knife that is arranged in parallel on the same axis in the width direction with respect to the supply direction of the cardboard sheet, and cuts the cardboard sheet;
A vertical movement mechanism for moving the plurality of slitters independently in the vertical direction;
Based on the number of sheets to be picked from the cardboard sheet, among the plurality of slitters, the slitter used for cutting the cardboard sheet is disposed at a predetermined processing position in the vertical direction, and A control device that controls the vertical movement mechanism so that a slitter that is not used to cut the cardboard sheet is disposed at a predetermined non-working position in the vertical direction;
Have
The plurality of slitters include a first slitter group including N + 1 slitters for performing the picking with respect to the maximum picking number N of the slitter device, and a picker smaller than the maximum picking number N. A second slitter group including one or more slitters for performing a picking operation with respect to the number N-1;
The control device
When switching the number of picks from N to N-1, a part of the slitters in the first slitter group is arranged at the non-machining position, and the second slitter group is arranged at the machining position. And controlling the vertical movement mechanism,
When switching the number of picks from N-1 to N, the second slitter group is disposed at the non-machining position, and a part of the slitters within the first slitter group is disposed at the machining position. as controls the vertical movement mechanism,
In the first slitter group, the other slitters excluding the some slitters include two slitters arranged at both ends in the width direction in the plurality of slitters, and the control device includes N, N-1, A slitter device characterized in that at least the two slitters are maintained at the processing position without switching the number of picks between the two . The plurality of slitters include first to seventh slitters, and the first to seventh slitters are arranged in the width direction of the cardboard sheet from the one end side toward the other end side. The second slitter, the third slitter, the fourth slitter, the fifth slitter, the sixth slitter, and the seventh slitter are arranged in this order.
The control device
When 4 is applied as the maximum number N, the first, second, fourth, sixth, and seventh slitters are used as the first slitter group, and the second slitter group is the second slitter group. Using 3 and 5 slitters,
In the case of four-cutter removal, the first, second, fourth, sixth, and seventh slitters are arranged at the processing positions, and in the case of three-cutter removal, the first, third, and fifth slitters are performed. And controlling the vertical movement mechanism so as to arrange the seventh slitter at the processing position,
When switching between 4 and 3 picking, the second, fourth and sixth slitters and the third and fifth slitters remain in the processing position while the first and seventh slitters remain in the processing position. 2. The slitter device according to claim 1, wherein the vertical movement mechanism is controlled so that one of the slitters is disposed at the machining position and the other of the slitters is disposed at the non-machining position. The plurality of slitters include first to seventh slitters, and the first to seventh slitters are arranged in the width direction of the cardboard sheet from the one end side toward the other end side. The second slitter, the third slitter, the fourth slitter, the fifth slitter, the sixth slitter, and the seventh slitter are arranged in this order.
The control device
When 5 is applied as the maximum picking number N, first, second, third, fifth, sixth and seventh slitters are used as the first slitter group, and the second slitter is used. Using a fourth slitter as a group,
In the case of five picking, the first, second, third, fifth, sixth and seventh slitters are arranged at the above processing positions, and in the case of four picking, the first and second Controlling the vertical movement mechanism so that the fourth, sixth and seventh slitters are arranged at the processing position,
When switching between 5 and 4 picking, the first, second, sixth and seventh slitters remain in the processing position, and the third and fifth slitters and the fourth slitter remain in place. 3. The slitter device according to claim 1, wherein the vertical movement mechanism is controlled so that one of the slitters is disposed at the machining position and the other of the slitters is disposed at the non-machining position. And a width direction moving mechanism for independently moving the first to seventh slitters in the width direction of the cardboard sheet,
The control device is configured to move each of the first to seventh slitters in the width direction according to the number of pages to be picked and the width of the sheet to be picked, which is the length in the width direction. The slitter apparatus of Claim 2 or 3 which controls a width direction moving mechanism.   In the case where the control device is switched to four picking, the first to seventh slitters are used to apply the first, second, fourth, sixth and seventh slitters to cut the cardboard sheet. When the position in the width direction to be set according to the trimming width is applied to each, the first, second, fourth, sixth, and the above when the interval between adjacent slitters is equal to or less than a predetermined threshold value. The vertical movement mechanism is controlled to cut the corrugated cardboard sheet by applying the third and fifth slitters instead of the first and seventh slitters in the seventh slitter. Slitter device.   In the case where the control device is switched to three picking, the first, third, fifth and seventh slitters are applied to each of the first to seventh slitters to cut the cardboard sheet. When the position in the width direction to be set according to the trimming width is applied, when the interval between adjacent slitters is equal to or less than a predetermined threshold, the first, third, fifth, and seventh slitters The slitter device according to claim 4 or 5, wherein the vertical movement mechanism is controlled so as to cut the cardboard sheet by applying the second and sixth slitters instead of the first and seventh slitters.

Images