Control device, control method, and computer program

Abstract

The present invention pertains to a control device (20) for controlling a scorer device (10). The scorer device (10) has, as a scorer head (11) that sandwiches a cardboard web (W) between an upper roll and a lower roll to form a ruled line, a first scorer head (11A) that forms a first ruled line (17A) and a second scorer head (11A) that is provided on the downstream side in a conveyance direction with respect to the first scorer head (11A) and forms a second ruled line (17B). The first scorer head (11A) and the second scorer head (11B) can be moved along the width direction. The control device (20) is provided with: an acquisition unit (20A) for acquiring an interval instruction value for setting the interval between the first ruled line (11A) and the second ruled line (11B); and a determination unit (20B) for determining a correction value for correcting the gap between the first scorer head (11A) and the second scorer head (11B) in accordance with manufacturing condition information including the acquired interval instruction value.

Description

Technical Field

[0001] The present invention relates to a control device, a control method, and a computer program for controlling a scorer device that performs scoring on a corrugated cardboard web.Background Art

[0002] In a corrugating machine that manufactures a corrugated board, a corrugated cardboard web that is continuously manufactured in a manufacturing line is slit into a plurality of pieces along a transfer direction of the corrugated cardboard web by a slitter device in the vicinity of a final process of the manufacturing line, and if necessary, scoring is performed along the transfer direction by a scorer device (see PTL 1 to be described below). Here, the scoring is processing of forming a score, which is a groove-shaped fold line for folding a corrugated board, in a corrugated cardboard web.

[0003] FIG. 6 is a schematic diagram of a general scorer device described in PTL 1 and the like. Reference sign MD in FIG. 6 indicates the transfer direction of a corrugated cardboard web W. The scorer device 10 includes scorer heads 11, each of which includes an upper roll 12U disposed above the corrugated cardboard web W (on a side indicated by "UP" in FIG. 6) and a lower roll 12D disposed below the corrugated cardboard web W (on a side indicated by "DW" in FIG. 6) and below the upper roll 12U. The upper roll 12U is rotatably supported at a tip of an arm 13. The arm 13 is oscillated up and down by a driving source such as a cylinder (not shown), so that the upper roll 12U is moved up and down with respect to the lower roll 12D.

[0004] In the above-described scorer device 10, the upper roll 12U is pushed toward the lower roll 12D, so that a gap between the upper roll 12U and the lower roll 12D in an up-down direction is adjusted. The corrugated cardboard web is pressed between the upper roll 12U and the lower roll 12D between which the gap is adjusted in this way, so that the scoring is performed with a depth of the score corresponding to the gap. That is, the depth of the score is adjusted according to the gap between the upper roll and the lower roll, and it can also be said that the depth of the score is adjusted by a pressing force (scoring pressure) for pushing the upper roll.

[0005] FIG. 7 is a schematic plan view of the scorer device 10 provided in a corrugator in the related art, as viewed from above. In the scorer device 10 shown in FIG. 7, the plurality of scorer heads 11 are arranged side by side along a width direction CD of a transfer line 10A on which the corrugated cardboard web W is transferred. Each of these scorer heads 11 is provided to be movable along the width direction CD, and can be disposed at any position in the width direction CD by a driving mechanism 16 (shown by a broken line in FIG. 7) such as a motor. Further, these scorer heads 11 are arranged side by side on an upstream side and a downstream side in the transfer direction MD of the corrugated cardboard web W. For example, in a case where the scorer heads 11 are arranged side by side only on the upstream side or only on the downstream side, there is a limit on adjacent arrangement between the scorer heads 11 adjacent to each other due to physical constraints. However, according to the scorer device 10 in which the scorer heads 11 are disposed on the upstream side and the downstream side, an interval between the scores 17 adjacent to each other can be narrowed without interference between the scorer heads 11 adjacent to each other.Citation ListPatent Literature

[0006] [PTL 1] Japanese Unexamined Patent Application Publication No. 2002-36399Summary of InventionTechnical Problem

[0007] In a case where scoring is performed on the corrugated cardboard web in the scorer device, an interval between scores adjacent to each other in the width direction may be set to a narrow interval of about 10 mm to several tens of mm. For example, in a case where a corrugated cardboard box 90 having a double wall 91 including an outer wall 91A and an inner wall 91B as shown in FIG. 9 is to be manufactured, a sheet forming the inner wall and a sheet forming the outer wall need to be folded to face each other. The corrugated cardboard box 90 shown in FIG. 9 is a tray-shaped box of which the top surface is open, and is shown in a cross-sectional view. In such a case, as shown in FIG. 8, an interval D between scores 17A and 17B is set to a narrow interval of about 10 mm to several tens of mm.

[0008] For example, among the plurality of scorer heads 11 shown in FIG. 7, it is assumed that a first scorer head 11A positioned on the upstream side in the transfer direction DM and a second scorer head 11B positioned on the downstream side in the transfer direction DM form the scores 17A and 17B set at the narrow interval as described above. In this case, the positions of the first scorer head 11A and the second scorer head 11B in the width direction CD are set to correspond to the interval D (see FIG. 8) between the scores 17A and 17B, and the upper rolls of the first scorer head 11A and the second scorer head 11B are pushed with a predetermined pressing force corresponding to an instructed score depth G (an instruction gap, see FIG. 8).

[0009] Here, since the first scorer head 11A is disposed on the upstream side of the second scorer head 11B, the score 17A (also referred to as a "first score") is first formed by the first scorer head 11A positioned on the upstream side and then the score 17B (also referred to as a "second score") is formed by the second scorer head 11B positioned on the downstream side.

[0010] Since the upper rolls of the first scorer head 11A and the second scorer head 11B are pushed with a common pressing force, the first score 17A and the second score 17B should be formed with a common depth G. However, in a case where the interval between the first score 17A and the second score 17B is small (the first score 17A and the second score 17B are close to each other), a depth G' of the first score 17A may be smaller than a depth G of the second score 17B.

[0011] The reason is as follows: Since the first score 17A is formed by the first scorer head 11A positioned on the upstream side and then the second score 17B is formed by the second scorer head 11B positioned on the downstream side, a portion of the upper surface of the corrugated board provided in a region of the first score 17A is pulled and the pushing of the first score 17A is restored when the upper roll of the second scorer head 11B pushes the corrugated board from the upper surface side. As a result, the actual depth G' of the first score 17A becomes smaller than the instructed score depth G.

[0012] That is, in the related art, the actual depth of the score may be different from the intended depth depending on an interval between scores adjacent to each other in a machine width direction, which may lead to a decrease in the quality of the corrugated board manufactured by the corrugating machine. Specifically, in a case where the depth of the first score 17A and the depth of the second score 17B are different from each other, there is a possibility that the shape of the score in the corrugated board, the folding strength of the score, the degree of folding of the score, and the like may differ for each score.

[0013] Therefore, one of objects of the present invention is to be capable of adjusting the depth of an actually formed score in accordance with an interval between adjacent scores.Solution to Problem

[0014] A control device according to an aspect of the present invention is a control device for controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line. The scorer device includes scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units. The scorer heads include a first scorer head that forms a first score and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units move the first scorer head and the second scorer head along the machine width direction, respectively, to adjust an interval between the first score and the second score in the machine width direction. The control device for controlling the scorer device includes an acquisition unit that acquires an interval instruction value for setting the interval between the first score and the second score with the movement units, and a determination unit that determines a correction value for correcting the gap of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value.

[0015] Further, a control method according to another aspect of the present invention is a control method of controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line. The scorer device includes scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units. The scorer heads include a first scorer head that forms a first score and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units move the first scorer head and the second scorer head along the machine width direction, respectively, to adjust an interval between the first score and the second score in the machine width direction. The control method of controlling the scorer device includes an acquisition step of acquiring an interval instruction value for setting the interval between the first score and the second score with the movement units, and a determination step of determining a correction value for correcting the gap of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value.

[0016] Furthermore, a computer program according to still another aspect of the present invention is a computer program for a control device for controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line. The scorer device includes scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units. The scorer heads include a first scorer head that forms a first score and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units move the first scorer head and the second scorer head along the machine width direction, respectively, to adjust an interval between the first score and the second score in the machine width direction. The computer program causes the control device, which controls the scorer device, to execute: an acquisition step of acquiring an interval instruction value for setting the interval between the first score and the second score with the movement units, and a determination step of determining a correction value for correcting the gap of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value.Advantageous Effects of Invention

[0017] According to the present invention, the gap between the upper roll and the lower roll of at least one of the first scorer head or the second scorer head is corrected in accordance with the manufacturing condition information including the interval (interval instruction value) between scores adjacent to each other in the machine width direction. Therefore, the depth of an actually formed score can be adjusted in accordance with the interval between the scores adjacent to each other in the machine width direction. For this reason, for example, even in a case where scores adjacent to each other via a narrow interval are formed in the scorer device, each score can be formed with an appropriate depth.

[0018] Therefore, it is possible to prevent a decrease in the quality of a corrugated board manufactured by the corrugating machine.Brief Description of Drawings

[0019] FIG. 1 is a plan view showing a control device according to an embodiment together with a scorer device. FIG. 2 is a diagram illustrating scores formed by the scorer device shown in FIG. 1. FIG. 3 is a block diagram showing control components of a corrugating machine provided with the scorer device shown in FIG. 1. FIG. 4 is a diagram illustrating an example of a data matrix for determining a correction value. FIG. 5 is a diagram illustrating an example of a display screen displaying the correction value. FIG. 6 is a schematic diagram of a scorer head of a general scorer device. FIG. 7 is a plan view of a scorer device illustrating the related art. FIG. 8 is a diagram illustrating scores formed by a scorer device in the related art. FIG. 9 is a cross-sectional view showing an example of a corrugated cardboard box having a double wall. Description of Embodiments

[0020] Hereinafter, a control device for a scorer device, a control method for the scorer device, and a computer program for the control device for controlling the scorer device according to embodiments will be described with reference to the drawings. Embodiments to be described below are merely illustrative, and do not intend to exclude application of various modifications or techniques that are not clearly shown in the embodiments. Each of the configurations of the embodiments to be described below can be variously modified and implemented without departing from the scope thereof. Further, the configurations can be selected as necessary, or can be appropriately combined.[1. Machine Configuration]

[0021] FIG. 1 is a plan view showing a control device according to the present invention together with a scorer device. The configuration of a mechanical device related to the scorer device according to the present embodiment is the same as that described with reference to FIGS. 6 and 7 in the background art section. Therefore, the same members and the like as those described in the background art will be denoted by the same reference numerals, and the description provided above will be appropriately used for the same components to simplify the description thereof.

[0022] In the following description, a "transfer direction MD" and a "width direction CD" are defined with reference to a corrugating machine on which the scorer device is mounted. The transfer direction MD is a direction in which a corrugated cardboard web as an object to be treated is transferred in the corrugating machine. The expressions of "upstream side" and "downstream side" are used with reference to the transfer direction MD. The "width direction CD" is a machine width direction of a transfer line in the corrugating machine, and is a direction intersecting the transfer direction MD along the surface of the corrugated cardboard web. Further, a vertical direction is referred to as "downward (lower side)", and a direction opposite to the lower side is referred to as "upward (upper side)".

[0023] The scorer device 10 is provided in a slitter-scorer apparatus that is provided in a corrugating machine (not shown) to perform scoring and slitting on a corrugated cardboard web W. The corrugating machine is a manufacturing line that manufactures sheet-like corrugated boards by bonding paper rolls to manufacture a strip-like corrugated cardboard web and performing processing such as slitting, scoring, and cutting while transferring the manufactured corrugated cardboard web W along a transfer line.

[0024] The scorer device 10 shown in FIG. 1 is a part of the slitter-scorer apparatus provided in the corrugating machine. The slitter-scorer apparatus is an apparatus that takes charge of slitting and scoring in the corrugating machine, and the scorer device 10 is a part of the slitter-scorer apparatus that takes charge of scoring.

[0025] The scorer device 10 pushes and forms (performs scoring) scores 17, which are groove-shaped fold lines used to fold the corrugated board, in a linear shape along the transfer direction MD, on the corrugated cardboard web W that is being transferred in the transfer direction MD on a transfer line 10A.

[0026] Seven (a plurality of) scorer heads 11 are arranged side by side in the scorer device 10 shown in FIG. 1 along the width direction CD of the transfer line on which the corrugated cardboard web W is transferred, and a plurality of scores 17 arranged in the width direction CD are formed by the respective scorer heads 11.

[0027] These scorer heads 11 are disposed on the upstream side and the downstream side in the transfer direction MD of the corrugated cardboard web W. These scorer heads 11 are provided to be movable along the width direction CD, and can be disposed at any position in the width direction CD by driving mechanisms 16 (shown by a broken line in FIG. 1) such as motors. That is, the driving mechanism 16 forms a movement unit that moves each of the scorer heads 11 along the width direction CD.

[0028] Each of the scorer heads 11 has the same configuration as the scorer head described with reference to FIG. 6 in the background art section. That is, the scorer device 10 includes an upper roll 12U that is disposed above the corrugated cardboard web W (on a side indicated by "UP" in FIG. 6) and a lower roll 12D that is disposed below the corrugated cardboard web W (on a side indicated by "DW" in FIG. 6) and below the upper roll 12U. The upper roll 12U is rotatably supported at a tip of an arm 13. The arm 13 is oscillated up and down by a driving source such as a cylinder (not shown), so that the upper roll 12U is moved up and down with respect to the lower roll 12D.

[0029] As described above with reference to FIG. 6, a gap in an up-down direction between the upper roll 12U and the lower roll 12D is adjusted by a pressing force (scoring pressure) for pushing the upper roll 12U against the lower roll 12D, and scoring is performed with a depth of a score corresponding to the gap. That is, the depth of the score 17 (see FIG. 1) formed by each scorer head 11 is adjusted by the gap between the upper roll 12U and the lower roll 12D, in other words, by a pressing force (scoring pressure) for pushing the upper roll 12U.

[0030] Here, among the plurality of scorer heads 11 shown in FIG. 1, the scorer head 11 disposed at an upstream left end in FIG. 1 is referred to as a "first scorer head 11A", and the scorer head 11 disposed on the downstream side of the first scorer head 11A is referred to as a "second scorer head 11B". Further, the score 17 formed by the first scorer head 11A is referred to as a "first score 17A", and the score 17 formed by the second scorer head 11B is referred to as a "second score 17B".

[0031] Hereinafter, a score depth adjustment (offset adjustment) function will be described using, as an example, a case where the first score 17A and the second score 17B are formed by the first scorer head 11A and the second scorer head 11B.

[0032] FIG. 2 is a schematic diagram illustrating the first score 17A and the second score 17B, and shows the cross-section of a portion of the corrugated cardboard web W at which the first score 17A and the second score 17B are formed, taken along a plane intersecting the transfer direction MD and the width direction CD.

[0033] As shown in FIG. 2, an interval D between the first score 17A and the second score 17B is a distance in the width direction CD between the first score 17A and the second score 17B. The interval D is, for example, a distance between a middle portion of a groove forming the first score 17A in the width direction CD and a middle portion of a groove forming the second score 17B in the width direction CD.

[0034] A score depth GA of the first score 17A and a score depth GB of the second score 17B are, for example, distances between the upper surface of the corrugated cardboard web W and the deepest portions (for example, the middle portions in the width direction CD) of the grooves forming the first score 17A and the second score 17B.[2. Control Configuration]

[0035] The control device 20 shown in FIG. 1 is an electronic control device that takes charge of a score depth adjustment function, which is one of various functions of controlling the scorer device 10, and is configured as, for example, an LSI device or an embedded electronic device in which a microprocessor, a ROM, a RAM, and the like are integrated.

[0036] The control device 20 is provided with an acquisition unit 20A and a determination unit 20B as functional elements relating to the score depth adjustment function.

[0037] The score depth adjustment function is a function of determining a correction value for adjusting (correcting) the score depth of at least one of the score 17A or the score 17B in accordance with manufacturing condition information that includes an interval instruction value for instructing the interval between the scores 17A and 17B adjacent to each other in the width direction CD. In other words, the score depth adjustment function can also be said to be a function of correcting the gap of at least one of the first scorer head 11A or the second scorer head 11B such that the score depth GA (see FIG. 2) of the score 17A and the score depth GB (see FIG. 2) of the score 17B are equal to each other.

[0038] The acquisition unit 20A acquires the manufacturing condition information including the interval instruction value. The interval instruction value is an instruction value for setting the interval D between the first score 17A and the second score 17B. The position of each score in the width direction is determined in accordance with the manufacturing condition information including the interval instruction value, and the positions of the first scorer head 11A and the second scorer head 11B in the width direction CD are adjusted based on the position of each score in the width direction.

[0039] The determination unit 20B determines a correction value for correcting the gap of at least one of the first scorer head 11A or the second scorer head 11B in accordance with the manufacturing condition information including the interval instruction value.

[0040] As described above with reference to FIG. 8, in a case where the interval D between the first score 17A and the second score 17B is narrow (the first score 17A and the second score 17B are close to each other), a score depth G' of the first score 17A may be smaller than a score depth G of the second score 17B. In other words, the score depth G of the second score 17B is a predetermined depth, whereas the score depth G' of the first score 17A may be smaller than the predetermined depth. A difference between the depth G' of the first score 17A and the depth G of the second score 17B is caused by the fact that the interval D between the first score 17A and the second score 17B is narrow (that is, the manufacturing condition information including the interval instruction value).

[0041] The correction value determined by the determination unit 20B is a value eliminating a difference in score depth between the first score 17A and the second score 17B caused by the manufacturing condition information including the above-described interval instruction value to adjust the score depths to be the same. That is, the correction value is set such that the score depth GA of the first score 17A and the score depth GB of the second score 17B are equal to each other in a state where both the first score 17A and the second score 17B are formed, and the correction value may also be an offset value for the score depths of the first score 17A and the second score 17B.

[0042] For example, the correction value determined by the determination unit 20B is a correction value for adjusting the gap of the first scorer head 11A, which is positioned on the upstream side, of the first scorer head 11A and the second scorer head 11B to a value smaller than the gap of the second scorer head 11B positioned on the downstream side in a case where the score depth of the first score 17A and the score depth of the second score 17B instructed using the manufacturing condition information are equal to each other. In this case, the correction value is used for the first scorer head 11A that forms the first score 17A of which the score depth G' is smaller than the predetermined depth, and is not used for the second scorer head 11B that forms the second score 17B of which the score depth G is the predetermined depth. Therefore, an instruction gap set in the second scorer head 11B is not corrected.

[0043] For example, the determination unit 20B determines whether or not the interval instruction value indicates an interval smaller than a predetermined reference value, and determines the correction value in a case where the determination unit 20B determines that the interval instruction value indicates an interval smaller than the predetermined reference value. Here, the predetermined reference value is set in advance as a narrow interval in which the score depth is required to be adjusted. Examples of the comparison between the interval instruction value and the predetermined reference value can include a determination of whether or not the interval instruction value is 20 mm or less. The numerical value of this reference value is one specific example and is not particularly limited.

[0044] The correction value determined by the determination unit 20B is not limited to a correction value for correcting the instruction gap to a small value (a negative correction value), that is, a correction value for narrowing the gap, and may also be a correction value for correcting the instruction gap to a large value (a positive correction value), that is, a correction value for widening the gap. Further, there is a case where the correction value determined by the determination unit 20B is zero, that is, the gap is not corrected.

[0045] A specific numerical value of the correction value determined by the determination unit 20B is set in advance based on a simulation, an experiment, or the like.

[0046] FIG. 3 is a block diagram showing control components of the corrugating machine provided with the scorer device 10 shown in FIG. 1.

[0047] The control components of the corrugating machine shown in FIG. 3 include a production management device 30 that comprehensively controls and manages the production (manufacture) of corrugated boards in the corrugating machine, and a control unit 40 that controls the scorer device 10 provided in the corrugating machine.

[0048] First, a basic control configuration of the scorer device 10 using the production management device 30 and the control unit 40 will be described. Subsequently, a detailed configuration of the score depth adjustment function for the scorer device 10 will be described.

[0049] The production management device 30 is a computer that comprehensively controls and manages the production (manufacture) of corrugated boards in the corrugating machine. The production management device 30 is connected to the control unit 40 and supplies order information, such as the number of pieces to be cut and a web width to be slit, to the control unit 40. The order information includes an interval instruction value for instructing an interval between scores and manufacturing condition information indicating manufacturing conditions such as the thickness of the corrugated cardboard web, the paper material of the corrugated cardboard web, and a score depth.

[0050] A customer production information system 31 is connected to the production management device 30, and production information on the corrugated board is supplied to the production management device 30 from a customer that is an ordering party of the corrugated board. The production management device 30 generates and outputs order information for the control unit 40, based on the supplied production information.

[0051] The control unit 40 includes, for example, a panel computer 40A that includes a display unit 41 and an operation unit 42 formed of a touch panel display, and a machine control programmable logic controller (PLC) 40B that is operated by a control signal transmitted from the panel computer 40A and controls the scorer heads 11 and the like.

[0052] The panel computer 40A is a computer that is mounted on the scorer device 10 to control the operation of the scorer device 10. In the panel computer 40A, the order information received from the production management device 30 is converted into positioning data for determining a machine position of each part of the scorer device 10 and the positioning data is transmitted to the machine control PLC 40B.

[0053] The positioning data includes data about the positions of the scorer heads 11 in the width direction and data about a pressing force (scoring pressure) for pushing the upper roll 12U in each scorer head 11.

[0054] Further, the panel computer 40A displays information on the display unit 41 and receives a worker's manual input from the operation unit 42. Details of the panel computer 40A will be described later.

[0055] The machine control PLC 40B receives machine positioning data and the like from the panel computer 40A and performs control for mechanically driving each part of each of the scorer heads 11 of the scorer device 10. The control performed by the machine control PLC 40B includes operation positioning control (movement control of the position in the width direction) of each of the scorer heads 11 and pushing drive control (scorer gap setting control) of the upper roll 12U. Specifically, the machine control PLC 40B transmits a control signal (positioning data) for mechanically driving each part of each of the scorer heads 11 of the scorer device 10.

[0056] In FIG. 3, components related to the scorer gap setting control among components related to mechanical drive control of the scorer heads 11 of the scorer device 10 are shown and the others thereof are omitted.

[0057] As shown in FIG. 3, each scorer head 11 includes a motor 18A that rotationally drives a drive shaft of an arm 13 (see FIG. 6) to which the upper roll 12U is attached, an encoder 18B that detects the rotation of the motor 18A, and a servo amplifier 19. In each of the scorer heads 11, the operation of the motor 18A is controlled through the servo amplifier 19 based on the control signal transmitted from the machine control PLC 40B and a detection signal of the encoder 18B. The arm 13 is driven by the operation of the motor 18A, so that the upper roll 12U is pushed toward the lower roll 12D with a pressing force corresponding to the above-described positioning data. Accordingly, a gap between the upper roll 12U and the lower roll 12D is adjusted.

[0058] Next, a detailed configuration of the score depth adjustment function in the scorer device 10 will be described.

[0059] In the control configuration example of the corrugating machine shown in FIG. 3, each of the production management device 30 and the panel computer 40A is provided with the control device 20 that takes charge of the score depth adjustment function. The control device provided in the production management device 30 is referred to as a control device 20X and a control device provided in the panel computer 40A is referred to as a control device 20Y for distinction between both the control devices. In a case where both the control devices do not need to be distinguished from each other, both the control devices are collectively referred to as the control device 20. The control devices 20X and 20Y have the same configuration and each include the acquisition unit 20A and the determination unit 20B.

[0060] An operation mode in which the score depth adjustment function is performed using the control device 20X of the production management device 30 is referred to as an "external instruction mode", and an operation mode in which the score depth adjustment function is performed using the control device 20Y of the panel computer 40A is referred to as an "internal instruction mode".

[0061] The panel computer 40A is provided with a mode selection unit 45 for selecting the "external instruction mode" or the "internal instruction mode". The mode selection unit 45 includes a selection switch that allows a worker to select the "external instruction mode" or the "internal instruction mode". The selection switch is configured using, for example, the display unit 41 and the operation unit 42 that are formed of a touch panel display.

[0062] First, the score depth adjustment function will be described in detail using, as an example, a case where the external instruction mode is selected.

[0063] The acquisition unit 20A of the control device 20X of the production management device 30 acquires the manufacturing condition information, which indicates manufacturing conditions including the interval instruction value, from the production information supplied from the customer production information system 31 or the order information generated by the production management device 30 based on the production information.

[0064] The interval instruction value, which is one piece of the manufacturing condition information, is set in advance based on the shape of the corrugated board to be manufactured (an interval between the scores to be formed on the board).

[0065] The manufacturing condition information includes the thickness (flute type) of the corrugated cardboard web, the paper material of the corrugated cardboard web, and the score depth, in addition to the interval instruction value. The paper material is defined by, for example, the basis weight of the corrugated cardboard web, a function given to the paper roll (a reinforced core, coated paper, water-repellent processing, or the like), or the like.

[0066] The determination unit 20B determines the correction value in accordance with the manufacturing condition information including the interval instruction value. For example, the determination unit 20B determines the correction value for adjusting the gap of the first scorer head 11A, which is positioned on the upstream side, of the first scorer head 11A and the second scorer head 11B.

[0067] The determination unit 20B is provided with a storage unit 21 that stores a data matrix for determining the correction value. The correction value to be determined in accordance with the manufacturing condition information including the interval instruction value is defined in advance in the data matrix.

[0068] FIG. 4 shows an example of the data matrix.

[0069] The data matrix is stored in the storage unit 21 for each thickness (flute type) of the corrugated cardboard web. As is well known, examples of the flute type of the corrugated cardboard web include an A flute, a B flute, a C flute, an E flute, an F flute, and the like. In the data matrix shown in FIG. 4, the item "xx flute" indicates the flute type corresponding to the data matrix. "xx" indicates any of the alphabetic characters that represent the flute types such as "A", "B", and "C".

[0070] In the row for "interval instruction value" of the data matrix shown in FIG. 4, 11 interval instruction values ranging from "10 (mm)" to "20 (mm)" are set in 1 (mm) increments.

[0071] Further, four gaps ranging from "P1" to "P4" are set in the column for "gap (instruction gap)". In FIG. 4, "P1" to "P4" are reference signs representing different gap dimensions. The numerical values (gaps) are set to increase in ascending order from "P1" toward "P4".

[0072] A correction value is set in a field where the row for "interval instruction value" and the column for "gap (instruction gap)" intersect. The correction values in the respective fields are denoted by signs such as "α1", "α2", "α3", ..., "β1", "β2", "β3", ..., "γ1", "γ2", "γ3", ..., "σ1", "σ2", "σ3", ..., and the like. A sign "-" attached to the reference sign indicates that the correction value is a negative numerical value, and a sign "+" indicates that the correction value is a positive numerical value. In a case of a negative numerical value, the correction value is a value for narrowing (reducing) the corresponding "gap". In a case of a positive numerical value, the correction value is a value for widening (increasing) the corresponding "gap".

[0073] A specific numerical value of the correction value is set in advance based on a simulation, an experiment, or the like. The specific numerical value of the correction value may be "0".

[0074] The column for "paper material (g)" is provided immediately to the left of the column for "gap (instruction gap)". A classification regarding the basis weight is set for the item "paper material" as an example of the paper material of the corrugated cardboard web (corrugated board). Roman numerals "I" to "III" for the item "paper material" are signs representing different basis weights (numerical values), and the numerical values (basis weights) are set to increase in ascending order from "I" to "III".

[0075] Specifically, the "basis weight" of the corrugated cardboard web is classified into the following four groups for the item "paper material". That is, the four groups are a first group of "I" or less ("~ I" in FIG. 4), a second group larger than "I" and equal to or smaller than "II" ("I ~ II" in FIG. 4), a third group larger than "II" and equal to or smaller than "III" ("II ~ III" in FIG. 4), and a fourth group larger than "III" ("III ~ " in FIG. 4).

[0076] The gap (instruction gap) is specified in accordance with the group of the paper material. Specifically, in a case where the paper material corresponds to the first group, the gap is set to "P1". In a case where the paper material corresponds to the second group, the gap is set to "P2". In a case where the paper material corresponds to the third group, the gap is set to "P3". In a case where the paper material corresponds to the fourth group, the gap is set to "P4".

[0077] In the determination unit 20B, a gap (instruction gap) corresponding to the thickness of the corrugated cardboard web and the paper material (basis weight) of the corrugated cardboard web of the manufacturing condition information acquired by the acquisition unit 20A is determined based on the data matrix shown in FIG. 4, and a correction value is determined in accordance with a combination of the gap (instruction gap) and the interval instruction value.

[0078] Here, the data matrix illustrated in FIG. 4 is configured such that the correction value is determined in a case where the interval instruction value is in the range of "10 (mm)" to "20 (mm)". For this reason, it can be said that the determination unit 20B is configured to determine whether or not the interval instruction value corresponds to a narrow interval of 20 (mm) or less and to determine the correction value in a case where the interval instruction value corresponds to the narrow interval. A lower limit of the interval between the scores is set to 10 (mm), and it is not assumed that the interval is set to a value smaller than the lower limit.

[0079] As shown in FIG. 3, the production management device 30 transmits the correction value and the gap (instruction gap), which are determined by the determination unit 20B of the control device 20X, to the panel computer 40A of the control unit 40 together with the order information including the interval instruction value.

[0080] In the panel computer 40A, the correction value and the gap (instruction gap) received from the production management device 30 are converted into positioning data for the scorer head 11A and 11B and the positioning data is transmitted to the machine control PLC 40B.

[0081] Specifically, an offset constant unit 46 of the panel computer 40A sets a distance (control target value) for the gap (a gap of at least one of the first scorer head 11A or the second scorer head 11B) of the first scorer head 11A, which is positioned on the upstream side, of the first scorer head 11A and the second scorer head 11B, based on the received correction value and the received gap (instruction gap).

[0082] On the other hand, a distance (control target value) for the gap (a gap of at least the other of the first scorer head 11A and the second scorer head 11B) of the second scorer head 11B, which is positioned on the downstream side, is set to a distance indicated by the gap (instruction gap) without any correction.

[0083] A positioning setting unit 47 of the panel computer 40A converts the distance (control target value) for the gap of each of the first scorer head 11A and the second scorer head 11B, which is set by the offset constant unit 46, into positioning data and transmits the positioning data to the machine control PLC 40B.

[0084] The machine control PLC 40B controls the operation of the motor 18A based on the transmitted positioning data to adjust (set) the gap of each of the first scorer head 11A and the second scorer head 11B.

[0085] For example, in a case where the correction value is a negative value, the gap of the first scorer head 11A is set to a value smaller than the gap of the second scorer head 11B. In a case where the correction value is a positive value, the gap of the first scorer head 11A is set to a value larger than the gap of the second scorer head 11B.

[0086] In addition, the depths of scores may not need to be adjusted depending on a manufacturing condition, such as a case where an interval between the scores is not small (in a case where the interval is 20 mm or more). In that case, the panel computer 40A converts the gap (instruction gap), which is received from the production management device 30, into positioning data and transmits the positioning data to the machine control PLC 40B. The machine control PLC 40B adjusts (sets) the gap of the scorer head 11 based on the positioning data.

[0087] The above-described score depth adjustment function is an "external instruction mode" in which the correction value and the gap (instruction gap) are instructed to the panel computer 40A from the production management device 30.

[0088] Next, the score depth adjustment function will be described in detail using, as an example, a case where the "internal instruction mode" for performing the score depth adjustment function using the control device 20Y of the panel computer 40A is selected.

[0089] The score depth adjustment function in a case where the "internal instruction mode" is selected is common to the above-described "external instruction mode" except that a correction value corresponding to the manufacturing condition information including the interval instruction value is determined by the control device 20Y provided in the panel computer 40A.

[0090] Specifically, in the control device 20Y of the panel computer 40A, the acquisition unit 20A acquires manufacturing condition information, which indicates manufacturing conditions including the interval instruction value, from the order information received from the production management device 30.

[0091] The determination unit 20B of the control device 20Y determines a gap (instruction gap) and a correction value, which correspond to the manufacturing condition information including the interval instruction value, based on the data matrix stored in the storage unit 21. The offset constant unit 46 and the positioning setting unit 47 of the panel computer 40A convert the gap (instruction gap) and the correction value into positioning data relating to the gaps of the first scorer head 11A and the second scorer head 11B, and transmit the positioning data to the machine control PLC 40B. The machine control PLC 40B controls the operation of the motor 18A based on the transmitted positioning data to adjust (set) the gap of each of the first scorer head 11A and the second scorer head 11B.

[0092] The above-described score depth adjustment function can be referred to as a "full auto mode (automatic adjustment)" in which the gap of the first scorer head 11A is automatically adjusted based on the correction value and the gap (instruction gap) determined by the determination unit 20B in both the "external instruction mode" and the "internal instruction mode". That is, the offset constant unit 46 and the positioning setting unit 47 function as an automatic adjustment unit.

[0093] As another example of the score depth adjustment function, it is conceivable that a worker manually adjusts the gap of the first scorer head 11A to the correction value (semi-auto mode, manual adjustment).

[0094] In this case, the display unit 41 of the panel computer 40A displays the correction value determined by the determination unit 20B on a display screen. For example, after the correction value is determined by the determination unit 20B, an instruction is given to the display unit 41 to indicate that the score depth needs to be adjusted and to activate a display screen for displaying a correction value. The display unit 41 activates the display screen for displaying a correction value in response to the instruction.

[0095] The operation unit 42 receives the input of the correction value displayed on the display screen. In the case of the "external instruction mode", the display unit 41 of the panel computer 40A receives the correction value and the gap (instruction gap) from the determination unit 20B of the control device 20X provided in the production management device 30. Further, in the case of the "internal instruction mode", the display unit 41 of the panel computer 40A receives the correction value and the gap (instruction gap) from the determination unit 20B of the control device 20Y provided in the panel computer 40A.

[0096] FIG. 5 is an example of a display screen that displays the correction value on the display unit 41. On the display screen 50 shown in FIG. 5, a message indicating that the score depth needs to be adjusted is displayed, and numerical values of the interval instruction value, the instruction gap, and the correction value are displayed.

[0097] A worker can input the correction value for correcting the gap of at least one of the first scorer head 11A or the second scorer head 11B and the gap (instruction gap) from the operation unit 42 with reference to the display screen 50. The offset constant unit 46 and the positioning setting unit 47 convert the correction value and the gap (instruction gap), which are input from the operation unit 42, into the positioning data relating to the gaps of the first scorer head 11A and the second scorer head 11B. The machine control PLC 40B controls the operation of the motor 18A based on the positioning data to adjust (set) the gap of each of the first scorer head 11A and the second scorer head 11B.

[0098] That is, the display unit 41 and the operation unit 42 function as a manual adjustment unit that manually adjusts the gap based on the correction value. In the present embodiment, it is assumed that automatic adjustment and manual adjustment coexist. For example, the configuration may be such that a worker can switch between the automatic adjustment and the manual adjustment using the operation unit 42.

[0099] In the cases of both the "external instruction mode" and the "internal instruction mode", a worker can display and input the correction value by using the display unit 41 and the operation unit 42 of the panel computer 40A.

[0100] Further, the production management device 30 may include a display unit 41' and an operation unit 42', and a worker can also display and input the correction value by using the display unit 41' and the operation unit 42' of the production management device 30.

[0101] Furthermore, in the case of the "full auto mode (automatic adjustment)", the display units 41 and 41' may display the correction values determined by the determination units 20B on the display screens.

[0102] In addition, for example, in a case where a score formed based on the correction value and the gap (instruction gap) displayed on the display screen 50 does not have a desired depth in the "full auto mode (automatic adjustment)", a worker may input any correction value and gap (instruction gap) from the operation unit 42 with reference to the correction value and the gap (instruction gap) displayed on the display screen 50.

[0103] Further, a worker inputs the correction value and the gap (instruction gap) displayed on the display screen 50 from the operation unit 42 in the above-described embodiment, but the present disclosure is not limited thereto. Either the correction value or the gap (instruction gap) may be input from the operation unit 42.

[0104] Furthermore, an operation of inputting the correction value using the operation unit 42 may be, for example, an operation of directly inputting the correction value as a numerical value using a ten-key or the like (not shown), or an increase or decrease operation of increasing or decreasing the correction value using an increase or decrease button or the like (not shown). In this case, the configuration may be such that the correction value gradually increases in a case where the increase button continues to be pressed and the correction value gradually decreases in a case where the decrease button continues to be pressed.[3. Control Method and Computer Program]

[0105] Since the control device 20 for the scorer device 10 according to the present embodiment is configured as described above, the control device 20 can perform the following control method.

[0106] First, the control device 20 executes an acquisition step of acquiring manufacturing condition information indicating manufacturing conditions including an interval instruction value by using the acquisition unit 20A.

[0107] Next, the control device 20 executes a determination step of determining a correction value for correcting a gap of at least one of the first scorer head 11A or the second scorer head 11B in accordance with the manufacturing condition information including the interval instruction value by using the determination unit 20B.

[0108] Further, a computer program for the control device 20 is configured as a computer program that causes the control device 20 to execute the acquisition step and the determination step. The computer program may be stored in an internal memory of the control device 20 or may be stored in an external memory that can be read by the control device 20.[4. Operational Effects]

[0109] Since the control device 20 for the scorer device 10 according to the present embodiment described above is configured as described above, the following operational effects are exhibited.

[0110] Since the control device 20 includes the acquisition unit 20A and the determination unit 20B, the control device 20 can acquire the manufacturing condition information including the interval instruction value and determine the correction value for correcting the gap (the gap of at least one of the first scorer head 11A or the second scorer head 11B) of the first scorer head 11A, which is positioned on the upstream side, of the first scorer head 11A and the second scorer head 11B in accordance with the manufacturing condition information including the interval instruction value.

[0111] For this reason, the gap of the first scorer head 11A can be corrected in accordance with the manufacturing condition information including the interval (interval instruction value) between the scores adjacent to each other in the machine width direction. Accordingly, the depth of an actually formed score can be adjusted in accordance with the interval between the scores adjacent to each other in the machine width direction.

[0112] Therefore, it is possible to prevent a decrease in the quality of a corrugated board manufactured by the corrugating machine.

[0113] For example, in a case where the interval D between the first score 17A and the second score 17B is narrow as shown in FIG. 2, the corrugated cardboard web W is pulled due to pushing that occurs in a case where the second score 17B is formed by the second scorer head 11B positioned on the downstream side in the related art. As a result, the score depth G' of the first score 17A formed earlier in time may become smaller than the score depth G of the second score 17B.

[0114] In contrast, according to the control device 20 for the scorer device 10 of the present embodiment, in a case where the score depth of the first score 17A and the score depth of the second score 17B instructed using the manufacturing condition information are equal to each other, when the first score 17A is formed by the first scorer head 11A positioned on the upstream side, the score depth GA of the first score 17A can be increased by the correction value (the amount of offset) (the gap of the first scorer head 11A can be narrowed). In this case, the correction value is set such that the score depth GA of the first score 17A and the score depth GB of the second score 17B are equal to each other after the second score 17B is formed by the second scorer head 11B positioned on the downstream side. Specifically, the correction value is to adjust the gap of the first scorer head 11A to a value smaller than the gap of the second scorer head 11B. For this reason, even though the corrugated cardboard web W is pulled due to pushing that occurs in a case where the second score 17B is formed by the second scorer head 11B positioned on the downstream side, the score depth GA of the first score 17A and the score depth GB of the second score 17B become equal to each other.

[0115] Further, since the gap of the first scorer head 11A can be automatically adjusted based on the correction value and the gap (instruction gap), which are determined by the determination unit 20B, by the offset constant unit 46 and the positioning setting unit 47 (automatic adjustment unit), the gap can be simply adjusted without time and effort for adjustment work.

[0116] Furthermore, a worker can manually input a correction value with reference to correction values displayed on the display units 41 and 41' by using the display units 41 and 41' and the operation units 42 and 42' (manual adjustment units). Therefore, even in a case where a worker manually adjusts the gap, the gap can be adjusted by an appropriate correction amount.

[0117] In addition, in the case of the "full auto mode (automatic adjustment)", the display units 41 and 41' display the correction values determined by the determination units 20B on the display screens. Accordingly, a worker can be informed of the necessity of the adjustment of the gap and an appropriate correction amount.

[0118] Further, the determination unit 20B includes the storage unit 21 that stores the data matrix in which the correction value determined in accordance with the manufacturing condition information including the interval instruction value, the thickness of the corrugated cardboard web, and the paper material (basis weight) of the corrugated cardboard web is defined in advance. Therefore, the determination unit 20B can determine a correction amount in accordance with the manufacturing condition information including the interval instruction value, the thickness of the corrugated cardboard web, and the paper material (basis weight) of the corrugated cardboard web. For this reason, it is possible to determine a more appropriate correction amount for the manufacturing condition information.[5. Others]

[0119] A case where the above-described determination unit 20B determines the correction value for correcting the gap of the first scorer head 11A has been described as an example. However, depending on the state or specifications of a corrugated cardboard web to be manufactured, the determination unit 20B may determine a correction value for correcting the gap of the second scorer head 11B. Further, the determination unit 20B may determine correction values for correcting the gaps of both the first scorer head 11A and the second scorer head 11B. In this case, the correction values for the first scorer head 11A and the second scorer head 11B are made different from each other. For example, the correction value for the first scorer head 11A is set to be larger than the correction value for the second scorer head 11B.

[0120] In addition, a case where the above-described determination unit 20B determines the correction value in a case where the interval instruction value indicates a narrow interval has been described as an example. However, in addition to or instead of the interval instruction value, the determination unit 20B may determine whether or not to perform the adjustment of the score depth (the determination of the correction value) in consideration of other manufacturing conditions. For example, depending on the thickness of the corrugated cardboard web or the paper material thereof, it is conceivable that the score depth is not adjusted (the correction value is not determined) even in a case where the interval instruction value indicates a narrow interval.

[0121] In the data matrix shown in FIG. 4, examples of an item of the paper material include "basis weight". However, a function given to the paper roll (whether or not a reinforced core is used, whether or not coated paper is used, whether or not water-repellent processing is performed, or the like) may be taken into consideration instead of or in addition to the basis weight. In a case where the number of the items of the paper material is increased, a more appropriate correction amount can be determined for the manufacturing conditions.[6. Supplementary Notes]

[0122] The following supplementary notes will be further disclosed with regard to the embodiments described above.(Supplementary Note 1)

[0123] A control device for controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line, the scorer device including scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units, the scorer heads including a first scorer head that forms a first score, and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units moving the first scorer head and the second scorer head along the machine width direction, respectively, to adjust an interval between the first score and the second score in the machine width direction, the control device including: an acquisition unit that acquires an interval instruction value for setting the interval between the first score and the second score with the movement units; and a determination unit that determines a correction value for correcting the gap of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value. (Supplementary Note 2)

[0124] The control device according to Supplementary Note 1, further including: an automatic adjustment unit that automatically adjusts the gap of at least one of the first scorer head or the second scorer head based on the correction value determined by the determination unit.(Supplementary Note 3)

[0125] The control device according to Supplementary Note 1 or 2, further including: a display unit that displays the correction value determined by the determination unit on a display screen.(Supplementary Note 4)

[0126] The control device according to Supplementary Note 3, further including: a manual adjustment unit into which a worker inputs a correction value for correcting the gap of at least one of the first scorer head or the second scorer head with reference to the correction value displayed on the display unit.(Supplementary Note 5)

[0127] The control device according to any one of Supplementary Notes 1 to 4, wherein the determination unit includes a storage unit that stores a data matrix in which the correction value determined in accordance with the manufacturing condition information including the interval instruction value, a thickness of the corrugated cardboard web, and a paper material of the corrugated cardboard web is defined in advance.(Supplementary Note 6)

[0128] The control device according to any one of Supplementary Notes 1 to 5, wherein, in a case where a score depth of the first score and a score depth of the second score instructed using the manufacturing condition information are equal to each other, the correction value is the correction value for adjusting the gap of the first scorer head to a value smaller than the gap of the second scorer head.(Supplementary Note 7)

[0129] The control device according to any one of Supplementary Notes 1 to 6, wherein the control device is included in a computer mounted in the scorer device to control an operation of the scorer device.(Supplementary Note 8)

[0130] The control device according to any one of Supplementary Notes 1 to 6, wherein the control device is included in a computer mounted on a production management device for managing manufacture of a corrugated board in a corrugating machine in which the scorer device is provided to manufacture the corrugated board from the corrugated cardboard web.(Supplementary Note 9)

[0131] A control method of controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line, the scorer device including scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units, the scorer heads including a first scorer head that forms a first score, and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units moving the first scorer head and the second scorer head along the machine width direction, respectively, to set an interval between the first score and the second score in the machine width direction, the control method including: an acquisition step of acquiring an interval instruction value for setting the interval between the first score and the second score with the movement units; and a determination step of determining a correction value for correcting the gap between the upper roll and the lower roll of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value. (Supplementary Note 10)

[0132] A computer program for a control device for controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line, the scorer device including scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units, the scorer heads including a first scorer head that forms a first score, and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units moving the first scorer head and the second scorer head along the machine width direction, respectively, to set an interval between the first score and the second score in the machine width direction, the computer program causing the control device to execute: an acquisition step of acquiring an interval instruction value for setting the interval between the first score and the second score with the movement units; and a determination step of determining a correction value for correcting the gap of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value. Reference Signs List

[0133] 10: scorer device 10A: transfer line 11: scorer head 11A: first scorer head 11B: second scorer head 11U: upper roll 12D: lower roll 12U: upper roll 13: arm 16: driving mechanism 17: score 17A: first score 17B: second score 18A: motor 18B: encoder 19: servo amplifier 20: control device 20A: acquisition unit 20B: determination unit 20X, 20Y: control device 21: storage unit 30: production management device 31: customer production information system 40: control unit 40A: panel computer 40B: machine control PLC 41, 41': display unit 42, 42': operation unit 45: mode selection unit 46: offset constant unit 47: positioning setting unit 50: display screen 90: corrugated cardboard box 91: double wall 91A: outer wall 91B: inner wall W: corrugated cardboard web

Examples

Embodiment Construction

[0020]Hereinafter, a control device for a scorer device, a control method for the scorer device, and a computer program for the control device for controlling the scorer device according to embodiments will be described with reference to the drawings. Embodiments to be described below are merely illustrative, and do not intend to exclude application of various modifications or techniques that are not clearly shown in the embodiments. Each of the configurations of the embodiments to be described below can be variously modified and implemented without departing from the scope thereof. Further, the configurations can be selected as necessary, or can be appropriately combined.

[1. Machine Configuration]

[0021]FIG. 1 is a plan view showing a control device according to the present invention together with a scorer device. The configuration of a mechanical device related to the scorer device according to the present embodiment is the same as that described with reference to FIGS. 6 and 7 in ...

Technical Field

[0001] The present invention relates to a control device, a control method, and a computer program for controlling a scorer device that performs scoring on a corrugated cardboard web.Background Art

[0002] In a corrugating machine that manufactures a corrugated board, a corrugated cardboard web that is continuously manufactured in a manufacturing line is slit into a plurality of pieces along a transfer direction of the corrugated cardboard web by a slitter device in the vicinity of a final process of the manufacturing line, and if necessary, scoring is performed along the transfer direction by a scorer device (see PTL 1 to be described below). Here, the scoring is processing of forming a score, which is a groove-shaped fold line for folding a corrugated board, in a corrugated cardboard web.

[0003] FIG. 6 is a schematic diagram of a general scorer device described in PTL 1 and the like. Reference sign MD in FIG. 6 indicates the transfer direction of a corrugated cardboard web W. The scorer device 10 includes scorer heads 11, each of which includes an upper roll 12U disposed above the corrugated cardboard web W (on a side indicated by "UP" in FIG. 6) and a lower roll 12D disposed below the corrugated cardboard web W (on a side indicated by "DW" in FIG. 6) and below the upper roll 12U. The upper roll 12U is rotatably supported at a tip of an arm 13. The arm 13 is oscillated up and down by a driving source such as a cylinder (not shown), so that the upper roll 12U is moved up and down with respect to the lower roll 12D.

[0004] In the above-described scorer device 10, the upper roll 12U is pushed toward the lower roll 12D, so that a gap between the upper roll 12U and the lower roll 12D in an up-down direction is adjusted. The corrugated cardboard web is pressed between the upper roll 12U and the lower roll 12D between which the gap is adjusted in this way, so that the scoring is performed with a depth of the score corresponding to the gap. That is, the depth of the score is adjusted according to the gap between the upper roll and the lower roll, and it can also be said that the depth of the score is adjusted by a pressing force (scoring pressure) for pushing the upper roll.

[0005] FIG. 7 is a schematic plan view of the scorer device 10 provided in a corrugator in the related art, as viewed from above. In the scorer device 10 shown in FIG. 7, the plurality of scorer heads 11 are arranged side by side along a width direction CD of a transfer line 10A on which the corrugated cardboard web W is transferred. Each of these scorer heads 11 is provided to be movable along the width direction CD, and can be disposed at any position in the width direction CD by a driving mechanism 16 (shown by a broken line in FIG. 7) such as a motor. Further, these scorer heads 11 are arranged side by side on an upstream side and a downstream side in the transfer direction MD of the corrugated cardboard web W. For example, in a case where the scorer heads 11 are arranged side by side only on the upstream side or only on the downstream side, there is a limit on adjacent arrangement between the scorer heads 11 adjacent to each other due to physical constraints. However, according to the scorer device 10 in which the scorer heads 11 are disposed on the upstream side and the downstream side, an interval between the scores 17 adjacent to each other can be narrowed without interference between the scorer heads 11 adjacent to each other.Citation ListPatent Literature

[0006] [PTL 1] Japanese Unexamined Patent Application Publication No. 2002-36399Summary of InventionTechnical Problem

[0007] In a case where scoring is performed on the corrugated cardboard web in the scorer device, an interval between scores adjacent to each other in the width direction may be set to a narrow interval of about 10 mm to several tens of mm. For example, in a case where a corrugated cardboard box 90 having a double wall 91 including an outer wall 91A and an inner wall 91B as shown in FIG. 9 is to be manufactured, a sheet forming the inner wall and a sheet forming the outer wall need to be folded to face each other. The corrugated cardboard box 90 shown in FIG. 9 is a tray-shaped box of which the top surface is open, and is shown in a cross-sectional view. In such a case, as shown in FIG. 8, an interval D between scores 17A and 17B is set to a narrow interval of about 10 mm to several tens of mm.

[0008] For example, among the plurality of scorer heads 11 shown in FIG. 7, it is assumed that a first scorer head 11A positioned on the upstream side in the transfer direction DM and a second scorer head 11B positioned on the downstream side in the transfer direction DM form the scores 17A and 17B set at the narrow interval as described above. In this case, the positions of the first scorer head 11A and the second scorer head 11B in the width direction CD are set to correspond to the interval D (see FIG. 8) between the scores 17A and 17B, and the upper rolls of the first scorer head 11A and the second scorer head 11B are pushed with a predetermined pressing force corresponding to an instructed score depth G (an instruction gap, see FIG. 8).

[0009] Here, since the first scorer head 11A is disposed on the upstream side of the second scorer head 11B, the score 17A (also referred to as a "first score") is first formed by the first scorer head 11A positioned on the upstream side and then the score 17B (also referred to as a "second score") is formed by the second scorer head 11B positioned on the downstream side.

[0010] Since the upper rolls of the first scorer head 11A and the second scorer head 11B are pushed with a common pressing force, the first score 17A and the second score 17B should be formed with a common depth G. However, in a case where the interval between the first score 17A and the second score 17B is small (the first score 17A and the second score 17B are close to each other), a depth G' of the first score 17A may be smaller than a depth G of the second score 17B.

[0011] The reason is as follows: Since the first score 17A is formed by the first scorer head 11A positioned on the upstream side and then the second score 17B is formed by the second scorer head 11B positioned on the downstream side, a portion of the upper surface of the corrugated board provided in a region of the first score 17A is pulled and the pushing of the first score 17A is restored when the upper roll of the second scorer head 11B pushes the corrugated board from the upper surface side. As a result, the actual depth G' of the first score 17A becomes smaller than the instructed score depth G.

[0012] That is, in the related art, the actual depth of the score may be different from the intended depth depending on an interval between scores adjacent to each other in a machine width direction, which may lead to a decrease in the quality of the corrugated board manufactured by the corrugating machine. Specifically, in a case where the depth of the first score 17A and the depth of the second score 17B are different from each other, there is a possibility that the shape of the score in the corrugated board, the folding strength of the score, the degree of folding of the score, and the like may differ for each score.

[0013] Therefore, one of objects of the present invention is to be capable of adjusting the depth of an actually formed score in accordance with an interval between adjacent scores.Solution to Problem

[0014] A control device according to an aspect of the present invention is a control device for controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line. The scorer device includes scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units. The scorer heads include a first scorer head that forms a first score and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units move the first scorer head and the second scorer head along the machine width direction, respectively, to adjust an interval between the first score and the second score in the machine width direction. The control device for controlling the scorer device includes an acquisition unit that acquires an interval instruction value for setting the interval between the first score and the second score with the movement units, and a determination unit that determines a correction value for correcting the gap of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value.

[0015] Further, a control method according to another aspect of the present invention is a control method of controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line. The scorer device includes scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units. The scorer heads include a first scorer head that forms a first score and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units move the first scorer head and the second scorer head along the machine width direction, respectively, to adjust an interval between the first score and the second score in the machine width direction. The control method of controlling the scorer device includes an acquisition step of acquiring an interval instruction value for setting the interval between the first score and the second score with the movement units, and a determination step of determining a correction value for correcting the gap of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value.

[0016] Furthermore, a computer program according to still another aspect of the present invention is a computer program for a control device for controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line. The scorer device includes scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units. The scorer heads include a first scorer head that forms a first score and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units move the first scorer head and the second scorer head along the machine width direction, respectively, to adjust an interval between the first score and the second score in the machine width direction. The computer program causes the control device, which controls the scorer device, to execute: an acquisition step of acquiring an interval instruction value for setting the interval between the first score and the second score with the movement units, and a determination step of determining a correction value for correcting the gap of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value.Advantageous Effects of Invention

[0017] According to the present invention, the gap between the upper roll and the lower roll of at least one of the first scorer head or the second scorer head is corrected in accordance with the manufacturing condition information including the interval (interval instruction value) between scores adjacent to each other in the machine width direction. Therefore, the depth of an actually formed score can be adjusted in accordance with the interval between the scores adjacent to each other in the machine width direction. For this reason, for example, even in a case where scores adjacent to each other via a narrow interval are formed in the scorer device, each score can be formed with an appropriate depth.

[0018] Therefore, it is possible to prevent a decrease in the quality of a corrugated board manufactured by the corrugating machine.Brief Description of Drawings

[0019] FIG. 1 is a plan view showing a control device according to an embodiment together with a scorer device. FIG. 2 is a diagram illustrating scores formed by the scorer device shown in FIG. 1. FIG. 3 is a block diagram showing control components of a corrugating machine provided with the scorer device shown in FIG. 1. FIG. 4 is a diagram illustrating an example of a data matrix for determining a correction value. FIG. 5 is a diagram illustrating an example of a display screen displaying the correction value. FIG. 6 is a schematic diagram of a scorer head of a general scorer device. FIG. 7 is a plan view of a scorer device illustrating the related art. FIG. 8 is a diagram illustrating scores formed by a scorer device in the related art. FIG. 9 is a cross-sectional view showing an example of a corrugated cardboard box having a double wall. Description of Embodiments

[0020] Hereinafter, a control device for a scorer device, a control method for the scorer device, and a computer program for the control device for controlling the scorer device according to embodiments will be described with reference to the drawings. Embodiments to be described below are merely illustrative, and do not intend to exclude application of various modifications or techniques that are not clearly shown in the embodiments. Each of the configurations of the embodiments to be described below can be variously modified and implemented without departing from the scope thereof. Further, the configurations can be selected as necessary, or can be appropriately combined.[1. Machine Configuration]

[0021] FIG. 1 is a plan view showing a control device according to the present invention together with a scorer device. The configuration of a mechanical device related to the scorer device according to the present embodiment is the same as that described with reference to FIGS. 6 and 7 in the background art section. Therefore, the same members and the like as those described in the background art will be denoted by the same reference numerals, and the description provided above will be appropriately used for the same components to simplify the description thereof.

[0022] In the following description, a "transfer direction MD" and a "width direction CD" are defined with reference to a corrugating machine on which the scorer device is mounted. The transfer direction MD is a direction in which a corrugated cardboard web as an object to be treated is transferred in the corrugating machine. The expressions of "upstream side" and "downstream side" are used with reference to the transfer direction MD. The "width direction CD" is a machine width direction of a transfer line in the corrugating machine, and is a direction intersecting the transfer direction MD along the surface of the corrugated cardboard web. Further, a vertical direction is referred to as "downward (lower side)", and a direction opposite to the lower side is referred to as "upward (upper side)".

[0023] The scorer device 10 is provided in a slitter-scorer apparatus that is provided in a corrugating machine (not shown) to perform scoring and slitting on a corrugated cardboard web W. The corrugating machine is a manufacturing line that manufactures sheet-like corrugated boards by bonding paper rolls to manufacture a strip-like corrugated cardboard web and performing processing such as slitting, scoring, and cutting while transferring the manufactured corrugated cardboard web W along a transfer line.

[0024] The scorer device 10 shown in FIG. 1 is a part of the slitter-scorer apparatus provided in the corrugating machine. The slitter-scorer apparatus is an apparatus that takes charge of slitting and scoring in the corrugating machine, and the scorer device 10 is a part of the slitter-scorer apparatus that takes charge of scoring.

[0025] The scorer device 10 pushes and forms (performs scoring) scores 17, which are groove-shaped fold lines used to fold the corrugated board, in a linear shape along the transfer direction MD, on the corrugated cardboard web W that is being transferred in the transfer direction MD on a transfer line 10A.

[0026] Seven (a plurality of) scorer heads 11 are arranged side by side in the scorer device 10 shown in FIG. 1 along the width direction CD of the transfer line on which the corrugated cardboard web W is transferred, and a plurality of scores 17 arranged in the width direction CD are formed by the respective scorer heads 11.

[0027] These scorer heads 11 are disposed on the upstream side and the downstream side in the transfer direction MD of the corrugated cardboard web W. These scorer heads 11 are provided to be movable along the width direction CD, and can be disposed at any position in the width direction CD by driving mechanisms 16 (shown by a broken line in FIG. 1) such as motors. That is, the driving mechanism 16 forms a movement unit that moves each of the scorer heads 11 along the width direction CD.

[0028] Each of the scorer heads 11 has the same configuration as the scorer head described with reference to FIG. 6 in the background art section. That is, the scorer device 10 includes an upper roll 12U that is disposed above the corrugated cardboard web W (on a side indicated by "UP" in FIG. 6) and a lower roll 12D that is disposed below the corrugated cardboard web W (on a side indicated by "DW" in FIG. 6) and below the upper roll 12U. The upper roll 12U is rotatably supported at a tip of an arm 13. The arm 13 is oscillated up and down by a driving source such as a cylinder (not shown), so that the upper roll 12U is moved up and down with respect to the lower roll 12D.

[0029] As described above with reference to FIG. 6, a gap in an up-down direction between the upper roll 12U and the lower roll 12D is adjusted by a pressing force (scoring pressure) for pushing the upper roll 12U against the lower roll 12D, and scoring is performed with a depth of a score corresponding to the gap. That is, the depth of the score 17 (see FIG. 1) formed by each scorer head 11 is adjusted by the gap between the upper roll 12U and the lower roll 12D, in other words, by a pressing force (scoring pressure) for pushing the upper roll 12U.

[0030] Here, among the plurality of scorer heads 11 shown in FIG. 1, the scorer head 11 disposed at an upstream left end in FIG. 1 is referred to as a "first scorer head 11A", and the scorer head 11 disposed on the downstream side of the first scorer head 11A is referred to as a "second scorer head 11B". Further, the score 17 formed by the first scorer head 11A is referred to as a "first score 17A", and the score 17 formed by the second scorer head 11B is referred to as a "second score 17B".

[0031] Hereinafter, a score depth adjustment (offset adjustment) function will be described using, as an example, a case where the first score 17A and the second score 17B are formed by the first scorer head 11A and the second scorer head 11B.

[0032] FIG. 2 is a schematic diagram illustrating the first score 17A and the second score 17B, and shows the cross-section of a portion of the corrugated cardboard web W at which the first score 17A and the second score 17B are formed, taken along a plane intersecting the transfer direction MD and the width direction CD.

[0033] As shown in FIG. 2, an interval D between the first score 17A and the second score 17B is a distance in the width direction CD between the first score 17A and the second score 17B. The interval D is, for example, a distance between a middle portion of a groove forming the first score 17A in the width direction CD and a middle portion of a groove forming the second score 17B in the width direction CD.

[0034] A score depth GA of the first score 17A and a score depth GB of the second score 17B are, for example, distances between the upper surface of the corrugated cardboard web W and the deepest portions (for example, the middle portions in the width direction CD) of the grooves forming the first score 17A and the second score 17B.[2. Control Configuration]

[0035] The control device 20 shown in FIG. 1 is an electronic control device that takes charge of a score depth adjustment function, which is one of various functions of controlling the scorer device 10, and is configured as, for example, an LSI device or an embedded electronic device in which a microprocessor, a ROM, a RAM, and the like are integrated.

[0036] The control device 20 is provided with an acquisition unit 20A and a determination unit 20B as functional elements relating to the score depth adjustment function.

[0037] The score depth adjustment function is a function of determining a correction value for adjusting (correcting) the score depth of at least one of the score 17A or the score 17B in accordance with manufacturing condition information that includes an interval instruction value for instructing the interval between the scores 17A and 17B adjacent to each other in the width direction CD. In other words, the score depth adjustment function can also be said to be a function of correcting the gap of at least one of the first scorer head 11A or the second scorer head 11B such that the score depth GA (see FIG. 2) of the score 17A and the score depth GB (see FIG. 2) of the score 17B are equal to each other.

[0038] The acquisition unit 20A acquires the manufacturing condition information including the interval instruction value. The interval instruction value is an instruction value for setting the interval D between the first score 17A and the second score 17B. The position of each score in the width direction is determined in accordance with the manufacturing condition information including the interval instruction value, and the positions of the first scorer head 11A and the second scorer head 11B in the width direction CD are adjusted based on the position of each score in the width direction.

[0039] The determination unit 20B determines a correction value for correcting the gap of at least one of the first scorer head 11A or the second scorer head 11B in accordance with the manufacturing condition information including the interval instruction value.

[0040] As described above with reference to FIG. 8, in a case where the interval D between the first score 17A and the second score 17B is narrow (the first score 17A and the second score 17B are close to each other), a score depth G' of the first score 17A may be smaller than a score depth G of the second score 17B. In other words, the score depth G of the second score 17B is a predetermined depth, whereas the score depth G' of the first score 17A may be smaller than the predetermined depth. A difference between the depth G' of the first score 17A and the depth G of the second score 17B is caused by the fact that the interval D between the first score 17A and the second score 17B is narrow (that is, the manufacturing condition information including the interval instruction value).

[0041] The correction value determined by the determination unit 20B is a value eliminating a difference in score depth between the first score 17A and the second score 17B caused by the manufacturing condition information including the above-described interval instruction value to adjust the score depths to be the same. That is, the correction value is set such that the score depth GA of the first score 17A and the score depth GB of the second score 17B are equal to each other in a state where both the first score 17A and the second score 17B are formed, and the correction value may also be an offset value for the score depths of the first score 17A and the second score 17B.

[0042] For example, the correction value determined by the determination unit 20B is a correction value for adjusting the gap of the first scorer head 11A, which is positioned on the upstream side, of the first scorer head 11A and the second scorer head 11B to a value smaller than the gap of the second scorer head 11B positioned on the downstream side in a case where the score depth of the first score 17A and the score depth of the second score 17B instructed using the manufacturing condition information are equal to each other. In this case, the correction value is used for the first scorer head 11A that forms the first score 17A of which the score depth G' is smaller than the predetermined depth, and is not used for the second scorer head 11B that forms the second score 17B of which the score depth G is the predetermined depth. Therefore, an instruction gap set in the second scorer head 11B is not corrected.

[0043] For example, the determination unit 20B determines whether or not the interval instruction value indicates an interval smaller than a predetermined reference value, and determines the correction value in a case where the determination unit 20B determines that the interval instruction value indicates an interval smaller than the predetermined reference value. Here, the predetermined reference value is set in advance as a narrow interval in which the score depth is required to be adjusted. Examples of the comparison between the interval instruction value and the predetermined reference value can include a determination of whether or not the interval instruction value is 20 mm or less. The numerical value of this reference value is one specific example and is not particularly limited.

[0044] The correction value determined by the determination unit 20B is not limited to a correction value for correcting the instruction gap to a small value (a negative correction value), that is, a correction value for narrowing the gap, and may also be a correction value for correcting the instruction gap to a large value (a positive correction value), that is, a correction value for widening the gap. Further, there is a case where the correction value determined by the determination unit 20B is zero, that is, the gap is not corrected.

[0045] A specific numerical value of the correction value determined by the determination unit 20B is set in advance based on a simulation, an experiment, or the like.

[0046] FIG. 3 is a block diagram showing control components of the corrugating machine provided with the scorer device 10 shown in FIG. 1.

[0047] The control components of the corrugating machine shown in FIG. 3 include a production management device 30 that comprehensively controls and manages the production (manufacture) of corrugated boards in the corrugating machine, and a control unit 40 that controls the scorer device 10 provided in the corrugating machine.

[0048] First, a basic control configuration of the scorer device 10 using the production management device 30 and the control unit 40 will be described. Subsequently, a detailed configuration of the score depth adjustment function for the scorer device 10 will be described.

[0049] The production management device 30 is a computer that comprehensively controls and manages the production (manufacture) of corrugated boards in the corrugating machine. The production management device 30 is connected to the control unit 40 and supplies order information, such as the number of pieces to be cut and a web width to be slit, to the control unit 40. The order information includes an interval instruction value for instructing an interval between scores and manufacturing condition information indicating manufacturing conditions such as the thickness of the corrugated cardboard web, the paper material of the corrugated cardboard web, and a score depth.

[0050] A customer production information system 31 is connected to the production management device 30, and production information on the corrugated board is supplied to the production management device 30 from a customer that is an ordering party of the corrugated board. The production management device 30 generates and outputs order information for the control unit 40, based on the supplied production information.

[0051] The control unit 40 includes, for example, a panel computer 40A that includes a display unit 41 and an operation unit 42 formed of a touch panel display, and a machine control programmable logic controller (PLC) 40B that is operated by a control signal transmitted from the panel computer 40A and controls the scorer heads 11 and the like.

[0052] The panel computer 40A is a computer that is mounted on the scorer device 10 to control the operation of the scorer device 10. In the panel computer 40A, the order information received from the production management device 30 is converted into positioning data for determining a machine position of each part of the scorer device 10 and the positioning data is transmitted to the machine control PLC 40B.

[0053] The positioning data includes data about the positions of the scorer heads 11 in the width direction and data about a pressing force (scoring pressure) for pushing the upper roll 12U in each scorer head 11.

[0054] Further, the panel computer 40A displays information on the display unit 41 and receives a worker's manual input from the operation unit 42. Details of the panel computer 40A will be described later.

[0055] The machine control PLC 40B receives machine positioning data and the like from the panel computer 40A and performs control for mechanically driving each part of each of the scorer heads 11 of the scorer device 10. The control performed by the machine control PLC 40B includes operation positioning control (movement control of the position in the width direction) of each of the scorer heads 11 and pushing drive control (scorer gap setting control) of the upper roll 12U. Specifically, the machine control PLC 40B transmits a control signal (positioning data) for mechanically driving each part of each of the scorer heads 11 of the scorer device 10.

[0056] In FIG. 3, components related to the scorer gap setting control among components related to mechanical drive control of the scorer heads 11 of the scorer device 10 are shown and the others thereof are omitted.

[0057] As shown in FIG. 3, each scorer head 11 includes a motor 18A that rotationally drives a drive shaft of an arm 13 (see FIG. 6) to which the upper roll 12U is attached, an encoder 18B that detects the rotation of the motor 18A, and a servo amplifier 19. In each of the scorer heads 11, the operation of the motor 18A is controlled through the servo amplifier 19 based on the control signal transmitted from the machine control PLC 40B and a detection signal of the encoder 18B. The arm 13 is driven by the operation of the motor 18A, so that the upper roll 12U is pushed toward the lower roll 12D with a pressing force corresponding to the above-described positioning data. Accordingly, a gap between the upper roll 12U and the lower roll 12D is adjusted.

[0058] Next, a detailed configuration of the score depth adjustment function in the scorer device 10 will be described.

[0059] In the control configuration example of the corrugating machine shown in FIG. 3, each of the production management device 30 and the panel computer 40A is provided with the control device 20 that takes charge of the score depth adjustment function. The control device provided in the production management device 30 is referred to as a control device 20X and a control device provided in the panel computer 40A is referred to as a control device 20Y for distinction between both the control devices. In a case where both the control devices do not need to be distinguished from each other, both the control devices are collectively referred to as the control device 20. The control devices 20X and 20Y have the same configuration and each include the acquisition unit 20A and the determination unit 20B.

[0060] An operation mode in which the score depth adjustment function is performed using the control device 20X of the production management device 30 is referred to as an "external instruction mode", and an operation mode in which the score depth adjustment function is performed using the control device 20Y of the panel computer 40A is referred to as an "internal instruction mode".

[0061] The panel computer 40A is provided with a mode selection unit 45 for selecting the "external instruction mode" or the "internal instruction mode". The mode selection unit 45 includes a selection switch that allows a worker to select the "external instruction mode" or the "internal instruction mode". The selection switch is configured using, for example, the display unit 41 and the operation unit 42 that are formed of a touch panel display.

[0062] First, the score depth adjustment function will be described in detail using, as an example, a case where the external instruction mode is selected.

[0063] The acquisition unit 20A of the control device 20X of the production management device 30 acquires the manufacturing condition information, which indicates manufacturing conditions including the interval instruction value, from the production information supplied from the customer production information system 31 or the order information generated by the production management device 30 based on the production information.

[0064] The interval instruction value, which is one piece of the manufacturing condition information, is set in advance based on the shape of the corrugated board to be manufactured (an interval between the scores to be formed on the board).

[0065] The manufacturing condition information includes the thickness (flute type) of the corrugated cardboard web, the paper material of the corrugated cardboard web, and the score depth, in addition to the interval instruction value. The paper material is defined by, for example, the basis weight of the corrugated cardboard web, a function given to the paper roll (a reinforced core, coated paper, water-repellent processing, or the like), or the like.

[0066] The determination unit 20B determines the correction value in accordance with the manufacturing condition information including the interval instruction value. For example, the determination unit 20B determines the correction value for adjusting the gap of the first scorer head 11A, which is positioned on the upstream side, of the first scorer head 11A and the second scorer head 11B.

[0067] The determination unit 20B is provided with a storage unit 21 that stores a data matrix for determining the correction value. The correction value to be determined in accordance with the manufacturing condition information including the interval instruction value is defined in advance in the data matrix.

[0068] FIG. 4 shows an example of the data matrix.

[0069] The data matrix is stored in the storage unit 21 for each thickness (flute type) of the corrugated cardboard web. As is well known, examples of the flute type of the corrugated cardboard web include an A flute, a B flute, a C flute, an E flute, an F flute, and the like. In the data matrix shown in FIG. 4, the item "xx flute" indicates the flute type corresponding to the data matrix. "xx" indicates any of the alphabetic characters that represent the flute types such as "A", "B", and "C".

[0070] In the row for "interval instruction value" of the data matrix shown in FIG. 4, 11 interval instruction values ranging from "10 (mm)" to "20 (mm)" are set in 1 (mm) increments.

[0071] Further, four gaps ranging from "P1" to "P4" are set in the column for "gap (instruction gap)". In FIG. 4, "P1" to "P4" are reference signs representing different gap dimensions. The numerical values (gaps) are set to increase in ascending order from "P1" toward "P4".

[0072] A correction value is set in a field where the row for "interval instruction value" and the column for "gap (instruction gap)" intersect. The correction values in the respective fields are denoted by signs such as "α1", "α2", "α3", ..., "β1", "β2", "β3", ..., "γ1", "γ2", "γ3", ..., "σ1", "σ2", "σ3", ..., and the like. A sign "-" attached to the reference sign indicates that the correction value is a negative numerical value, and a sign "+" indicates that the correction value is a positive numerical value. In a case of a negative numerical value, the correction value is a value for narrowing (reducing) the corresponding "gap". In a case of a positive numerical value, the correction value is a value for widening (increasing) the corresponding "gap".

[0073] A specific numerical value of the correction value is set in advance based on a simulation, an experiment, or the like. The specific numerical value of the correction value may be "0".

[0074] The column for "paper material (g)" is provided immediately to the left of the column for "gap (instruction gap)". A classification regarding the basis weight is set for the item "paper material" as an example of the paper material of the corrugated cardboard web (corrugated board). Roman numerals "I" to "III" for the item "paper material" are signs representing different basis weights (numerical values), and the numerical values (basis weights) are set to increase in ascending order from "I" to "III".

[0075] Specifically, the "basis weight" of the corrugated cardboard web is classified into the following four groups for the item "paper material". That is, the four groups are a first group of "I" or less ("~ I" in FIG. 4), a second group larger than "I" and equal to or smaller than "II" ("I ~ II" in FIG. 4), a third group larger than "II" and equal to or smaller than "III" ("II ~ III" in FIG. 4), and a fourth group larger than "III" ("III ~ " in FIG. 4).

[0076] The gap (instruction gap) is specified in accordance with the group of the paper material. Specifically, in a case where the paper material corresponds to the first group, the gap is set to "P1". In a case where the paper material corresponds to the second group, the gap is set to "P2". In a case where the paper material corresponds to the third group, the gap is set to "P3". In a case where the paper material corresponds to the fourth group, the gap is set to "P4".

[0077] In the determination unit 20B, a gap (instruction gap) corresponding to the thickness of the corrugated cardboard web and the paper material (basis weight) of the corrugated cardboard web of the manufacturing condition information acquired by the acquisition unit 20A is determined based on the data matrix shown in FIG. 4, and a correction value is determined in accordance with a combination of the gap (instruction gap) and the interval instruction value.

[0078] Here, the data matrix illustrated in FIG. 4 is configured such that the correction value is determined in a case where the interval instruction value is in the range of "10 (mm)" to "20 (mm)". For this reason, it can be said that the determination unit 20B is configured to determine whether or not the interval instruction value corresponds to a narrow interval of 20 (mm) or less and to determine the correction value in a case where the interval instruction value corresponds to the narrow interval. A lower limit of the interval between the scores is set to 10 (mm), and it is not assumed that the interval is set to a value smaller than the lower limit.

[0079] As shown in FIG. 3, the production management device 30 transmits the correction value and the gap (instruction gap), which are determined by the determination unit 20B of the control device 20X, to the panel computer 40A of the control unit 40 together with the order information including the interval instruction value.

[0080] In the panel computer 40A, the correction value and the gap (instruction gap) received from the production management device 30 are converted into positioning data for the scorer head 11A and 11B and the positioning data is transmitted to the machine control PLC 40B.

[0081] Specifically, an offset constant unit 46 of the panel computer 40A sets a distance (control target value) for the gap (a gap of at least one of the first scorer head 11A or the second scorer head 11B) of the first scorer head 11A, which is positioned on the upstream side, of the first scorer head 11A and the second scorer head 11B, based on the received correction value and the received gap (instruction gap).

[0082] On the other hand, a distance (control target value) for the gap (a gap of at least the other of the first scorer head 11A and the second scorer head 11B) of the second scorer head 11B, which is positioned on the downstream side, is set to a distance indicated by the gap (instruction gap) without any correction.

[0083] A positioning setting unit 47 of the panel computer 40A converts the distance (control target value) for the gap of each of the first scorer head 11A and the second scorer head 11B, which is set by the offset constant unit 46, into positioning data and transmits the positioning data to the machine control PLC 40B.

[0084] The machine control PLC 40B controls the operation of the motor 18A based on the transmitted positioning data to adjust (set) the gap of each of the first scorer head 11A and the second scorer head 11B.

[0085] For example, in a case where the correction value is a negative value, the gap of the first scorer head 11A is set to a value smaller than the gap of the second scorer head 11B. In a case where the correction value is a positive value, the gap of the first scorer head 11A is set to a value larger than the gap of the second scorer head 11B.

[0086] In addition, the depths of scores may not need to be adjusted depending on a manufacturing condition, such as a case where an interval between the scores is not small (in a case where the interval is 20 mm or more). In that case, the panel computer 40A converts the gap (instruction gap), which is received from the production management device 30, into positioning data and transmits the positioning data to the machine control PLC 40B. The machine control PLC 40B adjusts (sets) the gap of the scorer head 11 based on the positioning data.

[0087] The above-described score depth adjustment function is an "external instruction mode" in which the correction value and the gap (instruction gap) are instructed to the panel computer 40A from the production management device 30.

[0088] Next, the score depth adjustment function will be described in detail using, as an example, a case where the "internal instruction mode" for performing the score depth adjustment function using the control device 20Y of the panel computer 40A is selected.

[0089] The score depth adjustment function in a case where the "internal instruction mode" is selected is common to the above-described "external instruction mode" except that a correction value corresponding to the manufacturing condition information including the interval instruction value is determined by the control device 20Y provided in the panel computer 40A.

[0090] Specifically, in the control device 20Y of the panel computer 40A, the acquisition unit 20A acquires manufacturing condition information, which indicates manufacturing conditions including the interval instruction value, from the order information received from the production management device 30.

[0091] The determination unit 20B of the control device 20Y determines a gap (instruction gap) and a correction value, which correspond to the manufacturing condition information including the interval instruction value, based on the data matrix stored in the storage unit 21. The offset constant unit 46 and the positioning setting unit 47 of the panel computer 40A convert the gap (instruction gap) and the correction value into positioning data relating to the gaps of the first scorer head 11A and the second scorer head 11B, and transmit the positioning data to the machine control PLC 40B. The machine control PLC 40B controls the operation of the motor 18A based on the transmitted positioning data to adjust (set) the gap of each of the first scorer head 11A and the second scorer head 11B.

[0092] The above-described score depth adjustment function can be referred to as a "full auto mode (automatic adjustment)" in which the gap of the first scorer head 11A is automatically adjusted based on the correction value and the gap (instruction gap) determined by the determination unit 20B in both the "external instruction mode" and the "internal instruction mode". That is, the offset constant unit 46 and the positioning setting unit 47 function as an automatic adjustment unit.

[0093] As another example of the score depth adjustment function, it is conceivable that a worker manually adjusts the gap of the first scorer head 11A to the correction value (semi-auto mode, manual adjustment).

[0094] In this case, the display unit 41 of the panel computer 40A displays the correction value determined by the determination unit 20B on a display screen. For example, after the correction value is determined by the determination unit 20B, an instruction is given to the display unit 41 to indicate that the score depth needs to be adjusted and to activate a display screen for displaying a correction value. The display unit 41 activates the display screen for displaying a correction value in response to the instruction.

[0095] The operation unit 42 receives the input of the correction value displayed on the display screen. In the case of the "external instruction mode", the display unit 41 of the panel computer 40A receives the correction value and the gap (instruction gap) from the determination unit 20B of the control device 20X provided in the production management device 30. Further, in the case of the "internal instruction mode", the display unit 41 of the panel computer 40A receives the correction value and the gap (instruction gap) from the determination unit 20B of the control device 20Y provided in the panel computer 40A.

[0096] FIG. 5 is an example of a display screen that displays the correction value on the display unit 41. On the display screen 50 shown in FIG. 5, a message indicating that the score depth needs to be adjusted is displayed, and numerical values of the interval instruction value, the instruction gap, and the correction value are displayed.

[0097] A worker can input the correction value for correcting the gap of at least one of the first scorer head 11A or the second scorer head 11B and the gap (instruction gap) from the operation unit 42 with reference to the display screen 50. The offset constant unit 46 and the positioning setting unit 47 convert the correction value and the gap (instruction gap), which are input from the operation unit 42, into the positioning data relating to the gaps of the first scorer head 11A and the second scorer head 11B. The machine control PLC 40B controls the operation of the motor 18A based on the positioning data to adjust (set) the gap of each of the first scorer head 11A and the second scorer head 11B.

[0098] That is, the display unit 41 and the operation unit 42 function as a manual adjustment unit that manually adjusts the gap based on the correction value. In the present embodiment, it is assumed that automatic adjustment and manual adjustment coexist. For example, the configuration may be such that a worker can switch between the automatic adjustment and the manual adjustment using the operation unit 42.

[0099] In the cases of both the "external instruction mode" and the "internal instruction mode", a worker can display and input the correction value by using the display unit 41 and the operation unit 42 of the panel computer 40A.

[0100] Further, the production management device 30 may include a display unit 41' and an operation unit 42', and a worker can also display and input the correction value by using the display unit 41' and the operation unit 42' of the production management device 30.

[0101] Furthermore, in the case of the "full auto mode (automatic adjustment)", the display units 41 and 41' may display the correction values determined by the determination units 20B on the display screens.

[0102] In addition, for example, in a case where a score formed based on the correction value and the gap (instruction gap) displayed on the display screen 50 does not have a desired depth in the "full auto mode (automatic adjustment)", a worker may input any correction value and gap (instruction gap) from the operation unit 42 with reference to the correction value and the gap (instruction gap) displayed on the display screen 50.

[0103] Further, a worker inputs the correction value and the gap (instruction gap) displayed on the display screen 50 from the operation unit 42 in the above-described embodiment, but the present disclosure is not limited thereto. Either the correction value or the gap (instruction gap) may be input from the operation unit 42.

[0104] Furthermore, an operation of inputting the correction value using the operation unit 42 may be, for example, an operation of directly inputting the correction value as a numerical value using a ten-key or the like (not shown), or an increase or decrease operation of increasing or decreasing the correction value using an increase or decrease button or the like (not shown). In this case, the configuration may be such that the correction value gradually increases in a case where the increase button continues to be pressed and the correction value gradually decreases in a case where the decrease button continues to be pressed.[3. Control Method and Computer Program]

[0105] Since the control device 20 for the scorer device 10 according to the present embodiment is configured as described above, the control device 20 can perform the following control method.

[0106] First, the control device 20 executes an acquisition step of acquiring manufacturing condition information indicating manufacturing conditions including an interval instruction value by using the acquisition unit 20A.

[0107] Next, the control device 20 executes a determination step of determining a correction value for correcting a gap of at least one of the first scorer head 11A or the second scorer head 11B in accordance with the manufacturing condition information including the interval instruction value by using the determination unit 20B.

[0108] Further, a computer program for the control device 20 is configured as a computer program that causes the control device 20 to execute the acquisition step and the determination step. The computer program may be stored in an internal memory of the control device 20 or may be stored in an external memory that can be read by the control device 20.[4. Operational Effects]

[0109] Since the control device 20 for the scorer device 10 according to the present embodiment described above is configured as described above, the following operational effects are exhibited.

[0110] Since the control device 20 includes the acquisition unit 20A and the determination unit 20B, the control device 20 can acquire the manufacturing condition information including the interval instruction value and determine the correction value for correcting the gap (the gap of at least one of the first scorer head 11A or the second scorer head 11B) of the first scorer head 11A, which is positioned on the upstream side, of the first scorer head 11A and the second scorer head 11B in accordance with the manufacturing condition information including the interval instruction value.

[0111] For this reason, the gap of the first scorer head 11A can be corrected in accordance with the manufacturing condition information including the interval (interval instruction value) between the scores adjacent to each other in the machine width direction. Accordingly, the depth of an actually formed score can be adjusted in accordance with the interval between the scores adjacent to each other in the machine width direction.

[0112] Therefore, it is possible to prevent a decrease in the quality of a corrugated board manufactured by the corrugating machine.

[0113] For example, in a case where the interval D between the first score 17A and the second score 17B is narrow as shown in FIG. 2, the corrugated cardboard web W is pulled due to pushing that occurs in a case where the second score 17B is formed by the second scorer head 11B positioned on the downstream side in the related art. As a result, the score depth G' of the first score 17A formed earlier in time may become smaller than the score depth G of the second score 17B.

[0114] In contrast, according to the control device 20 for the scorer device 10 of the present embodiment, in a case where the score depth of the first score 17A and the score depth of the second score 17B instructed using the manufacturing condition information are equal to each other, when the first score 17A is formed by the first scorer head 11A positioned on the upstream side, the score depth GA of the first score 17A can be increased by the correction value (the amount of offset) (the gap of the first scorer head 11A can be narrowed). In this case, the correction value is set such that the score depth GA of the first score 17A and the score depth GB of the second score 17B are equal to each other after the second score 17B is formed by the second scorer head 11B positioned on the downstream side. Specifically, the correction value is to adjust the gap of the first scorer head 11A to a value smaller than the gap of the second scorer head 11B. For this reason, even though the corrugated cardboard web W is pulled due to pushing that occurs in a case where the second score 17B is formed by the second scorer head 11B positioned on the downstream side, the score depth GA of the first score 17A and the score depth GB of the second score 17B become equal to each other.

[0115] Further, since the gap of the first scorer head 11A can be automatically adjusted based on the correction value and the gap (instruction gap), which are determined by the determination unit 20B, by the offset constant unit 46 and the positioning setting unit 47 (automatic adjustment unit), the gap can be simply adjusted without time and effort for adjustment work.

[0116] Furthermore, a worker can manually input a correction value with reference to correction values displayed on the display units 41 and 41' by using the display units 41 and 41' and the operation units 42 and 42' (manual adjustment units). Therefore, even in a case where a worker manually adjusts the gap, the gap can be adjusted by an appropriate correction amount.

[0117] In addition, in the case of the "full auto mode (automatic adjustment)", the display units 41 and 41' display the correction values determined by the determination units 20B on the display screens. Accordingly, a worker can be informed of the necessity of the adjustment of the gap and an appropriate correction amount.

[0118] Further, the determination unit 20B includes the storage unit 21 that stores the data matrix in which the correction value determined in accordance with the manufacturing condition information including the interval instruction value, the thickness of the corrugated cardboard web, and the paper material (basis weight) of the corrugated cardboard web is defined in advance. Therefore, the determination unit 20B can determine a correction amount in accordance with the manufacturing condition information including the interval instruction value, the thickness of the corrugated cardboard web, and the paper material (basis weight) of the corrugated cardboard web. For this reason, it is possible to determine a more appropriate correction amount for the manufacturing condition information.[5. Others]

[0119] A case where the above-described determination unit 20B determines the correction value for correcting the gap of the first scorer head 11A has been described as an example. However, depending on the state or specifications of a corrugated cardboard web to be manufactured, the determination unit 20B may determine a correction value for correcting the gap of the second scorer head 11B. Further, the determination unit 20B may determine correction values for correcting the gaps of both the first scorer head 11A and the second scorer head 11B. In this case, the correction values for the first scorer head 11A and the second scorer head 11B are made different from each other. For example, the correction value for the first scorer head 11A is set to be larger than the correction value for the second scorer head 11B.

[0120] In addition, a case where the above-described determination unit 20B determines the correction value in a case where the interval instruction value indicates a narrow interval has been described as an example. However, in addition to or instead of the interval instruction value, the determination unit 20B may determine whether or not to perform the adjustment of the score depth (the determination of the correction value) in consideration of other manufacturing conditions. For example, depending on the thickness of the corrugated cardboard web or the paper material thereof, it is conceivable that the score depth is not adjusted (the correction value is not determined) even in a case where the interval instruction value indicates a narrow interval.

[0121] In the data matrix shown in FIG. 4, examples of an item of the paper material include "basis weight". However, a function given to the paper roll (whether or not a reinforced core is used, whether or not coated paper is used, whether or not water-repellent processing is performed, or the like) may be taken into consideration instead of or in addition to the basis weight. In a case where the number of the items of the paper material is increased, a more appropriate correction amount can be determined for the manufacturing conditions.[6. Supplementary Notes]

[0122] The following supplementary notes will be further disclosed with regard to the embodiments described above.(Supplementary Note 1)

[0123] A control device for controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line, the scorer device including scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units, the scorer heads including a first scorer head that forms a first score, and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units moving the first scorer head and the second scorer head along the machine width direction, respectively, to adjust an interval between the first score and the second score in the machine width direction, the control device including: an acquisition unit that acquires an interval instruction value for setting the interval between the first score and the second score with the movement units; and a determination unit that determines a correction value for correcting the gap of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value. (Supplementary Note 2)

[0124] The control device according to Supplementary Note 1, further including: an automatic adjustment unit that automatically adjusts the gap of at least one of the first scorer head or the second scorer head based on the correction value determined by the determination unit.(Supplementary Note 3)

[0125] The control device according to Supplementary Note 1 or 2, further including: a display unit that displays the correction value determined by the determination unit on a display screen.(Supplementary Note 4)

[0126] The control device according to Supplementary Note 3, further including: a manual adjustment unit into which a worker inputs a correction value for correcting the gap of at least one of the first scorer head or the second scorer head with reference to the correction value displayed on the display unit.(Supplementary Note 5)

[0127] The control device according to any one of Supplementary Notes 1 to 4, wherein the determination unit includes a storage unit that stores a data matrix in which the correction value determined in accordance with the manufacturing condition information including the interval instruction value, a thickness of the corrugated cardboard web, and a paper material of the corrugated cardboard web is defined in advance.(Supplementary Note 6)

[0128] The control device according to any one of Supplementary Notes 1 to 5, wherein, in a case where a score depth of the first score and a score depth of the second score instructed using the manufacturing condition information are equal to each other, the correction value is the correction value for adjusting the gap of the first scorer head to a value smaller than the gap of the second scorer head.(Supplementary Note 7)

[0129] The control device according to any one of Supplementary Notes 1 to 6, wherein the control device is included in a computer mounted in the scorer device to control an operation of the scorer device.(Supplementary Note 8)

[0130] The control device according to any one of Supplementary Notes 1 to 6, wherein the control device is included in a computer mounted on a production management device for managing manufacture of a corrugated board in a corrugating machine in which the scorer device is provided to manufacture the corrugated board from the corrugated cardboard web.(Supplementary Note 9)

[0131] A control method of controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line, the scorer device including scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units, the scorer heads including a first scorer head that forms a first score, and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units moving the first scorer head and the second scorer head along the machine width direction, respectively, to set an interval between the first score and the second score in the machine width direction, the control method including: an acquisition step of acquiring an interval instruction value for setting the interval between the first score and the second score with the movement units; and a determination step of determining a correction value for correcting the gap between the upper roll and the lower roll of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value. (Supplementary Note 10)

[0132] A computer program for a control device for controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line, the scorer device including scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units, the scorer heads including a first scorer head that forms a first score, and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units moving the first scorer head and the second scorer head along the machine width direction, respectively, to set an interval between the first score and the second score in the machine width direction, the computer program causing the control device to execute: an acquisition step of acquiring an interval instruction value for setting the interval between the first score and the second score with the movement units; and a determination step of determining a correction value for correcting the gap of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value. Reference Signs List

[0133] 10: scorer device 10A: transfer line 11: scorer head 11A: first scorer head 11B: second scorer head 11U: upper roll 12D: lower roll 12U: upper roll 13: arm 16: driving mechanism 17: score 17A: first score 17B: second score 18A: motor 18B: encoder 19: servo amplifier 20: control device 20A: acquisition unit 20B: determination unit 20X, 20Y: control device 21: storage unit 30: production management device 31: customer production information system 40: control unit 40A: panel computer 40B: machine control PLC 41, 41': display unit 42, 42': operation unit 45: mode selection unit 46: offset constant unit 47: positioning setting unit 50: display screen 90: corrugated cardboard box 91: double wall 91A: outer wall 91B: inner wall W: corrugated cardboard web

Examples

Embodiment Construction

[0020]Hereinafter, a control device for a scorer device, a control method for the scorer device, and a computer program for the control device for controlling the scorer device according to embodiments will be described with reference to the drawings. Embodiments to be described below are merely illustrative, and do not intend to exclude application of various modifications or techniques that are not clearly shown in the embodiments. Each of the configurations of the embodiments to be described below can be variously modified and implemented without departing from the scope thereof. Further, the configurations can be selected as necessary, or can be appropriately combined.

[1. Machine Configuration]

[0021]FIG. 1 is a plan view showing a control device according to the present invention together with a scorer device. The configuration of a mechanical device related to the scorer device according to the present embodiment is the same as that described with reference to FIGS. 6 and 7 in ...

Claims

1. A control device for controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line, the scorer device including scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units, the scorer heads including a first scorer head that forms a first score, and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units moving the first scorer head and the second scorer head along the machine width direction, respectively, to adjust an interval between the first score and the second score in the machine width direction, the control device comprising: an acquisition unit that acquires an interval instruction value for setting the interval between the first score and the second score with the movement units; and a determination unit that determines a correction value for correcting the gap of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value.

2. The control device according to Claim 1, further comprising: an automatic adjustment unit that automatically adjusts the gap of at least one of the first scorer head or the second scorer head based on the correction value determined by the determination unit.

3. The control device according to Claim 1, further comprising: a display unit that displays the correction value determined by the determination unit on a display screen.

4. The control device according to Claim 3, further comprising: a manual adjustment unit into which a worker inputs a correction value for correcting the gap of at least one of the first scorer head or the second scorer head with reference to the correction value displayed on the display unit.

5. The control device according to Claim 1, wherein the determination unit includes a storage unit that stores a data matrix in which the correction value determined in accordance with the manufacturing condition information including the interval instruction value, a thickness of the corrugated cardboard web, and a paper material of the corrugated cardboard web is defined in advance.

6. The control device according to Claim 1, wherein, in a case where a score depth of the first score and a score depth of the second score instructed using the manufacturing condition information are equal to each other, the correction value is the correction value for adjusting the gap of the first scorer head to a value smaller than the gap of the second scorer head.

7. The control device according to Claim 1, wherein the control device is included in a computer mounted in the scorer device to control an operation of the scorer device.

8. The control device according to Claim 1, wherein the control device is included in a computer mounted on a production management device for managing manufacture of a corrugated board in a corrugating machine in which the scorer device is provided to manufacture the corrugated board from the corrugated cardboard web.

9. A control method of controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line, the scorer device including scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units, the scorer heads including a first scorer head that forms a first score, and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units moving the first scorer head and the second scorer head along the machine width direction, respectively, to set an interval between the first score and the second score in the machine width direction, the control method comprising: an acquisition step of acquiring an interval instruction value for setting the interval between the first score and the second score with the movement units; and a determination step of determining a correction value for correcting the gap between the upper roll and the lower roll of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value.

10. A computer program for a control device for controlling a scorer device that forms a plurality of scores arranged in a machine width direction intersecting a transfer direction of a corrugated cardboard web continuously transferred on a transfer line, the scorer device including scorer heads, each of which includes an upper roll disposed above the corrugated cardboard web and a lower roll disposed below the corrugated cardboard web and sandwiches the corrugated cardboard web in a gap between the upper roll and the lower roll that are separated from each other in an up-down direction to form a score having a depth corresponding to the gap, and movement units, the scorer heads including a first scorer head that forms a first score, and a second scorer head that is provided on a downstream side of the first scorer head in the transfer direction and forms a second score adjacent to the first score in the machine width direction, and the movement units moving the first scorer head and the second scorer head along the machine width direction, respectively, to set an interval between the first score and the second score in the machine width direction, the computer program causing the control device to execute: an acquisition step of acquiring an interval instruction value for setting the interval between the first score and the second score with the movement units; and a determination step of determining a correction value for correcting the gap of at least one of the first scorer head or the second scorer head in accordance with manufacturing condition information including the acquired interval instruction value.

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