JP4554227B2 - Continuous sheet cutting method - Google Patents

Description

  The present invention relates to a cutting method for cutting a continuous sheet such as a corrugated cardboard sheet. More specifically, the present invention relates to a method for cutting a corrugated cardboard sheet without increasing the cost of a product while holding a trimming piece in a continuous band before and after an order change. The present invention relates to a cutting method capable of preventing meandering.

  Conventionally, a corrugated cardboard sheet that is continuously fed along a supply line is cut in a sheet feeding direction (flow direction) by a slitter having a plurality of slitter blades. Each of the plurality of slitters can move vertically between a load level for cutting the cardboard sheet and an unload level for not cutting the cardboard sheet, and the width direction of the cardboard sheet (perpendicular to the supply line). It is configured to be movable in the direction), and according to the order of the picking or picking width, the slitter to be cut is selected and moved to the load level for cutting, and the slitter that is not cut is unloaded. I try to move to the level.

In the corrugated sheet production line, the corrugated sheet is continuously cut. In particular, the band-shaped cut residue of a predetermined width generated on both sides of the corrugated board sheet is respectively trimmed as a trimming piece by a trimming piece collecting mechanism, for example, a suction duct. Aspirated and collected.
When changing the order of cutting such as the number of cuttings and the cutting width, the slitter that continuously cuts over the new and old orders out of multiple slitters without stopping the supply line from the viewpoint of ensuring efficiency. In accordance with the order change, the cardboard sheet is moved in the width direction from the cutting position of the old order to the cutting position of the new order and set up. In this case, since the corrugated cardboard sheet sent during the setup is discarded, it is desired to shorten the time required for the setup as much as possible.

  In this regard, from the viewpoint of preventing the suction duct from being clogged with the trimming piece during the order change, the trimming piece is supplied to the supply line before and after the order change of the cardboard sheet cutting by the single slitter unit. A method of cutting a corrugated cardboard sheet that can be formed into a continuous strip in the direction is disclosed in, for example, Japanese Patent Laid-Open No. 10-86093.

Japanese Patent Laid-Open No. 10-86093

  In this cutting method, slitters that continue to be cut in the new order, including the slitter that performs trimming, are moved in the width direction to the cutting position of the new order with the cardboard sheet cut. Therefore, each slitter has a circular slitter blade that can pivot about an axis perpendicular to the cardboard sheet, and the pivot angle can be controlled in accordance with the supply speed of the cardboard sheet. According to this cutting method, each slitter that has been cut in the old order is kept in the processed state and moved to the trimming position of the new order in the width direction, so that the slitter is temporarily released to the unload level. Thus, the trimming piece can be formed into a continuous band before and after the order change while shortening the length of the movement locus and shortening the setup time.

However, this cutting method has the following technical problems.
First, it is difficult to prevent meandering of the corrugated cardboard sheet depending on the way of picking. More specifically, each slitter has a slitter blade that can be swiveled to move in the width direction while being held in a cut state during order change from the viewpoint of reducing resistance from a supplied corrugated cardboard sheet. In addition, the turning angle is controlled. However, depending on the method of picking, the base or width direction of the slitter that moves in the width direction is different from the base number or width direction of the slitter that moves in the opposite direction of the width, and the slitter moves in the cut state. During this process, corrugated cardboard sheets meander, and it may be necessary to stop the line.

On the other hand, for the slitter that performs trimming, the trimming piece is trimmed to make a continuous strip in the direction of the supply line before and after the order change from the viewpoint of sucking the trimming piece well into the duct and reliably preventing the clogging of the duct. It is desirable to move in the width direction while maintaining the processed state.
Second, there is a problem caused by the fact that each slitter is used for both trimming and normal cutting. More specifically, a pair of slitters arranged on the outermost side are usually used for trimming. However, trimming may be performed by an inner slitter depending on the trimming or trimming width of the new order. Therefore, in order to keep the trimming piece in a continuous band before and after the order change, the slitter that performs trimming needs to be moved in the width direction to the trimming position of the new order while maintaining the trimming state. The slitter needs to be turnable and the turn angle can be adjusted, resulting in an extra equipment cost.

Therefore, in view of the above problems, the object of the present invention is to maintain the trimming pieces in a continuous belt shape before and after the order change regardless of the contents of the cutting order change of the cardboard sheet, and without increasing the cost of the product. An object of the present invention is to provide a corrugated cardboard sheet cutting method capable of preventing sheet meandering.

To achieve the above object, the present invention is capable of moving in a vertical direction and a sheet width direction in a cutting method for cutting a continuous sheet to be processed that is continuously supplied along a supply line using a slitter unit. Provided with a single slitter unit having a plurality of slitter blades, and cutting blades that are movable in the vertical direction and the sheet width direction and that are rotatable about a substantially vertical axis are provided on both sides of the sheet width direction. and a step of trimming dedicated cutting means provided at intervals in the supply line direction from the single slitter units, the steps of providing a trim duct for sucking trimming piece, when the order change from the old order to the new order, a single with releasing the slitter blade slitter unit from the order change starting point Pe of the old order to the vertical direction, trimming only cut Starting point in the vicinity of the cutting blade stages on the upstream side of the order change starting point Pe P1-1, move to the treated surface of the continuous sheet in the vertical direction at P1-2, cut to trim piece of the old order And a slitter blade of a single slitter unit is moved up and down toward the surface of the continuous sheet to be processed, and cutting of the sheet is started at the order change completion point Ps of the new order . end point P1-3 of the cutting blade from the order change completion point Ps in proximity to the downstream side, has the steps of releasing the vertical direction from the trimming strip of the new order at P1-4, the cutting blade of the trimming only the cutting means By moving in the sheet width direction from the start points P1-1 and P1-2 toward the end points P1-3 and P1-4 In other words, the sheet is cut so as to straddle the trimming piece of the old order and the trimming piece of the new order, and the trimming piece is formed into a continuous band shape.
According to the present invention configured as described above, the trimming-dedicated cutting means that is movable in the vertical direction is provided separately from the slitter at an interval in the supply line direction, so that cutting can be performed in the old order at the time of order change. For the slitters that had been trimmed, including the slitters that were being trimmed, the slitters were temporarily released from the continuous sheet to be processed and moved to the processing position of the new order, while the trimming means was continuously processed in the vertical direction. Move toward and cut into the trim pieces of the old order. While the slitter with the longest setup time required to move from the cutting position of the old order to the cutting position of the new order moves to the cutting position of the new order, the continuous sheet to be processed is trimmed by the trimming dedicated cutting means. Move to. Next, the slitter that performs cutting in the new order is moved in the vertical direction toward the continuous sheet to be processed, and cutting of the sheet is started at the cutting position of the new order. To escape.

As described above, the slitter moves longer in the width direction compared with the case where it is moved in the width direction with the processed continuous sheet cut, but it is possible to increase the moving speed because it moves away from the processed sheet during movement. Yes, it is possible to suppress an increase in setup time, while only the trimming cutting means can be turned freely, and the trimming cutting means need not be positioned on the trimming cutting lines of the old and new trimming pieces. However, if it is cut into the old and new trimming pieces, it is possible to form a continuous band, reducing the equipment cost for controlling the turning angle of all slits while reducing the equipment cost of the trimming cutting means. Therefore, while suppressing the cost increase of the sheet product, meandering the corrugated cardboard sheet regardless of the trimming width or the trimming width. It is possible to stop.

It may also have the step of cutting the cutting blade of the trimming dedicated cutting means on the outside of the processed continuous sheet than the inner line of each new and old order of trimming piece.
Further, the cutting blade of the trimming-dedicated cutting means has a disk shape, and has a rotational drive means that rotates about a substantially horizontal axis passing through the center of the disk-shaped cutting blade . When cutting the continuous sheet to be processed, the disk-shaped cutting blade swivels based on the feed speed of the continuous sheet to be processed and the moving speed of the cutting blade of the cutting means dedicated for trimming in the width direction of the continuous sheet to be processed. You may have the step which adjusts an angle.
Furthermore, you may have the step which provides the cutting means only for trimming, a single slitter unit , and a trim duct toward the downstream of a supply line.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, the corrugating machine 10 of this embodiment includes a speed sensor 50 for measuring the supply speed V1 of the cardboard sheet 1 in order from the upstream side along the supply line of the cardboard sheet 1, and a trim cutting device 51. A slitter unit 2 and a trim duct 4 are provided.
As shown in FIG. 2, a pair of beams 28 and 30 are placed in parallel between the frames 26 and 26 of the slitter unit 2 at a predetermined interval in the vertical direction so as to sandwich the pass line PL of the cardboard sheet. A plurality of sets (5 sets in this embodiment) of slitter blade units 24 are supported by the pair of beams 28 and 30 at a distance from each other in the width direction of the cardboard sheet. Each of the slitter blade units 24 is composed of an upper unit 24A and a lower unit 24B across a cardboard sheet pass line PL, and each unit includes disk-shaped slitter blades 20 and 20 that rotate in opposite directions. By supplying a corrugated cardboard sheet between the slitter blades 20, 20, the corrugated cardboard sheet is cut in a form sandwiched along the feed direction. Since the upper unit 24A and the lower unit 24B are vertically symmetrical with respect to the pass line PL of the cardboard sheet, the upper unit 24A will be described below, and the same reference will be made to the same elements for the lower unit 24B. The description is omitted by assigning a number.

As shown in FIG. 3, the upper unit 24A includes a disk-shaped slitter blade 20, a rotation drive mechanism that rotationally drives the slitter blade 20, a width direction moving mechanism that moves the slitter blade 20 in the width direction, and a slitter blade. An up-down direction moving mechanism that moves 20 up and down between a load level and an unload level is schematically configured.
The slitter blade 20 is disposed substantially perpendicular to the sheet surface of the corrugated cardboard sheet, and is rotatably supported by a rotation shaft 61 protruding from the lower case 60 in the sheet width direction. The motor 62 accommodated in the lower case 60 These are individually driven to rotate by a rotation drive mechanism including a transmission mechanism 63 such as a gear mechanism. In particular, a pair of slitter blades 20 and 20 positioned at the outermost position of the slitter unit 2 form a trimming piece T having a predetermined width as a cut piece on each side of the corrugated cardboard sheet. The air is sucked and collected by the duct 4.
The width direction moving mechanism will be described. The same number of moving members 36 as the slitter blades 20 are slidably supported on the upper beam 28 via a pair of rollers 34. A nut 36 a rotatably provided on the moving member 36 is screwed onto a screw shaft 38 that is installed and fixed between the frames 26 and 26. By driving individual servo motors 40 as individual actuators provided on each moving member 36, the nut 36a is rotationally driven by the meshing of the gear 40a on the motor side and the gear 36b formed on the nut 36a. Accordingly, the individual moving members 36 and the plurality of slitter blades 20 are individually moved and positioned in the sheet width direction.
The vertical movement mechanism will be described. As shown in FIG. 3, the upper case 64 is provided so as to be rotatable within a certain angle range with the shaft 44 as a fulcrum with respect to the lower side of the moving member 36. The upper case 64 is connected to the piston rod 46a of the cylinder 46, and the extension of the piston rod 46a causes the upper case 64 and the slitter blade 20 to cut the cardboard sheet, and the unload level retracted upward from the load level. It is designed to move in a pivotable manner.

With the configuration as described above, each slitter blade 20 is positioned at the load level including the slitter blade 20 that has been trimmed in accordance with the order change such as the number of cuttings and the cutting width. After the cutting of the old order is completed, it is once moved to the unload level, moved in the width direction by a predetermined distance, and then moved to the load level for cutting the new order.
Next, as shown in FIG. 4, the trim cutting device 51 includes circular thin blade heads 52 and 53 provided at two locations in the width direction of the corrugated cardboard sheet 1, and the circular thin blade heads 52 and 53 are respectively circular and thin. The plate-shaped cutting blade 56, a width direction moving mechanism that moves the cutting blade 56 in the width direction, and a vertical movement mechanism that moves the cutting blade 56 in the vertical direction between a load level and an unload level. The frame members 58 are supported by the beam members 54 extending in the width direction of the cardboard sheet 1 so as to be movable coaxially in the width direction of the cardboard sheet 1.

A urethane roll 55 is disposed on the side opposite to the circular thin blade heads 52 and 53 with respect to the cardboard sheet 1. The urethane roll 55 is rotated at a peripheral speed substantially equal to the supply speed of the corrugated board sheet 1 by a drive motor (not shown). The trim cutting device 51 is not limited to the upstream side of the slitter 2 in the supply line direction, and may be provided on the downstream side. Further, instead of the urethane roll 55, a roll with a brush or a circular plate with a slit corresponding to a cutting blade 56 described later may be used.
Since the circular thin blade heads 52 and 53 have the same structure, one circular thin blade head 52 will be described with reference to FIG. The circular thin blade head 52 includes a circular thin thin plate-like cutting blade 56, and the cutting blade 56 is rotatably supported around the support shaft 58 at the center thereof, and the support shaft 58 is attached to the turning member 60. Yes. In addition, you may comprise so that the cutting blade 56 may be rotationally driven with a motor.
The turning member 60 is provided with a turning shaft 71 perpendicular to the corrugated cardboard sheet 1. The turning shaft 71 is rotatably supported by the bracket 64 via a bearing 64a. On the other hand, the lower case 60 protrudes downward from the upper case 64 and is coupled to the lower end of the rotating shaft 65 rotatably supported by the bearing portion 64a in the upper case 64. As a result, as shown in FIG. 5, the cutting blade 56 is rotatable about an axis O that is substantially perpendicular to the sheet surface of the cardboard sheet. In particular, the center C1 of the support shaft 58 and the center C2 of the turning shaft 71 are eccentric by a predetermined amount a, and the eccentric direction is configured to be downstream with respect to the supply direction of the corrugated cardboard sheet 1. ing. As a result, as shown in FIG. 5 (B), the resistance force received by the cutting blade 56 from the corrugated cardboard sheet acts mainly at a position deviated from the axis O, so that the cutting blade 56 is smoothly swiveled around the axis O. When the corrugated cardboard sheet is trimmed by the cutting blade 56, the turning angle of the cutting blade 56 is determined by the supply line direction speed of the corrugated cardboard sheet and the moving speed of the cutting blade 56 in the sheet width direction. .
Each of the width direction moving mechanism and the vertical direction moving mechanism has the same structure as the corresponding mechanism of the slitter unit 2 described above, and therefore, the same reference numerals are given to the same components and the description thereof is omitted.
The vertical direction moving speed and the width direction moving speed of the trimming cutting device are, for example, approximately 0.5 m / second and approximately 1 m / second, respectively.

  FIG. 6 is a block diagram showing the electrical configuration of the slitter control system. As shown in FIG. 1A, the slitter 1 includes an I / O port 131 and a control unit 130 including a CPU 132, a ROM 133, a RAM 134, and the like connected to the I / O port 131. The ROM 133 controls the slitter. The program is stored. In addition, a host production management device 180 is connected to the I / O port 131. The host production management device 180 manages and controls the entire production of the corrugator line that performs cutting and the like, and stores, for example, production order data such as the number of slitters to be picked and the width of picking. Transfers a control signal based on the data to the target slitter.

  A general-purpose operation unit 181 such as a keyboard and a touch panel and a timer 182 are connected to the I / O port 131, and a slitter blade group driving unit 142 and a trimming cutting device unit 143 corresponding to the slitter unit 2 are connected. The slitter blade group drive unit 142 and the trimming / cutting device unit 143 include as many individual drive units 135 corresponding to the slitter blade units 24 as the number of the slitter blade units 24. Each individual drive unit 135 has a servo drive unit 136 and a cylinder drive unit 140, as shown in FIG. 6B, and is connected to the I / O port 131, respectively. The servo drive unit 136 is connected to the servo motor 40 and the pulse generator 137 for each slitter blade unit 24. The servo motor 40 drives the servo motor 40, and the pulse generator 137 is in the sheet width direction of the slitter blade 20. The current position is detected and transmitted to the servo drive unit 136. The cylinder drive unit 140 is connected to the cylinder 46 for loading and unloading the slitter blade 20, and drives the cylinder 46. Further, the I / O port 131 is connected to a pulse generator 83 connected to a rotating unit that rotates at a speed synchronized with sheet feeding, such as a roll of a sheet feeding device, and the detected sheet feeding speed information is input to the I / O port. 131.

  Hereinafter, the operation of the slitter will be described mainly focusing on the control mode at the time of order change. It is assumed that an order change signal is input from the higher-level production management device 180 in FIG. 6 while the slitter unit is disconnected, and thereby an order change start point Pe is set on the sheet. In the present embodiment, it is assumed that the number of picks of the current order is 3, the number of picks of the next order is 2, and the width of the trimming piece TM is widened on the next order side. This will be described with reference to FIG.

  First, the slitter 2 positions the slitter blade 20 at a processing position in accordance with processing data set in advance, and processes the slit. As shown in FIG. 8, when three sheets are taken from the cardboard sheet 1, the trim pieces T1-1 and T1-2 are cut by the upper and lower slitter blades 20 and 20 on both outer sides in the width direction of the cardboard sheet 1. On this assumption, first, in S1 to S3 of FIG. 7, the position of each slitter blade 20 of the slitter unit 2 (C1 to C5: that is, the cutting position of the current order) from the higher-level production management device 180, and each of the next order. The position of the slitter blade 20 (C1 ′ to C5 ′: that is, the cutting position of the next order) is received as order change information. Further, as shown in FIG. 6, the sheet feed speed VL is detected and taken in by the pulse generator 83. Here, the positions C1 ′ to C5 ′ of the slitter blades 20 on the next order side are directly required for changing the order. The next orders such as the number of sheets to be picked, sheet width, flap width, trimming width, etc. You may make it calculate based on information.

Next, in S4, the amount of movement of each slitter blade 20 on the next order side in the sheet width direction is calculated by comparing the current position with the next order position (C1 ′ to C5 ′). When the number of picks is changed, in S5, the slitter blade 20 that is to be unloaded in the next order (unused one) is selected. Next, in S6, among the slitter blades that are reused in the old and new orders, the setup time Tc required until the slitter blade that requires the most positioning time from the start of positioning completes the positioning is calculated. Thus, in S7, based on the supply speed V1 measured by the speed sensor 50, the length during which the corrugated cardboard sheet is supplied during the order change preparation, that is, during the order change time Tc, is calculated. The order change completion point Ps can be specified.
Next, in S <b> 8, the trimming device 51 moves the cutting blade 56 to the current slitter position, particularly to the position in the width direction of the slitter that is performing trimming. More specifically, the circular thin blade heads 52 and 53 previously drive the servo motor 40 to positions corresponding to the upper and lower slitter heads 20 on both outer sides in the width direction of the corrugated cardboard sheet 1 in the old order, Positioning is performed via 40a, 36b, nut 36a, and screw shaft 38.
Next, in S9, the movement distance in the width direction of the cutting blade 56 is calculated based on the cutting position of the new order, in particular, the width direction position of the slitter to be trimmed, and this width direction movement distance is divided by the calculated order change time Tc. Thus, the moving speed in the width direction of the cutting blade 56 at the time of loading is calculated.

Next, when it is detected in S10 that Pe has passed, the slitter blade 20 is once moved to the unload level (S13), and the cutting blade 56 is moved to the load level to trim the corrugated cardboard sheet (S11). . More specifically, based on the measurement by the speed sensor 50, the piston 46 is driven slightly before the order change point Pe reaches the trim cutting device 51, and the cutting blade together with the turning member 60 is connected via the bracket 64. 56 is moved toward the cardboard sheet 1.
Therefore, at the time of the order change, the cutting blade 56 first starts immediately before the order change point Pe, on the slit by the slitter blade 20, or in the vicinity of this slit, the start point P1-1 on the outer side in the width direction of the cardboard sheet 1. For example, the load state is set at a high speed of about 0.5 m / sec so as to start cutting from P1-2. Cutting of the corrugated cardboard sheet 1 is started by the cutting blade 56 and the urethane roll 55 as shown by a broken line in FIG. In this case, it is preferable to move the cutting blade 56 to the load level immediately before passing Pe as shown in FIG.

Next, in S12, the cutting blade 56 moves in the width direction at a predetermined width direction speed while the corrugated cardboard sheet is cut. More specifically, the circular thin blade heads 52 and 53 are changed from the slit positions of the trim pieces T1-1 and T1-2 in the old order to the slit positions of the trim pieces T1-3 and T1-4 in the new order (= order). The servo motor 40 is driven toward the change completion point Ps) and moved in the width direction at a high speed of, for example, approximately 1 m / sec via the bevel gears 40a and 36b, the nut 36a and the screw shaft 38.
At this time, since the corrugated cardboard sheet 1 is continuously supplied, the cutting blade 56 receives a resistance force in the supply direction of the corrugated cardboard sheet 1 and simultaneously moves the circular thin blade heads 52 and 53 in the width direction of the corrugated cardboard sheet 1. Receiving and resisting by. Therefore, the cutting blade 56 receives both resistance forces, turns around the turning shaft 65, and faces a direction parallel to the resultant direction of both resistance forces.
Note that the cutting blade 56 may be configured to be moved in the width direction of the corrugated cardboard sheet 1 and to be numerically controlled while being driven by a servo motor (not shown). Based on the supply speed V1 of the corrugated cardboard sheet 1 and the moving speed V2 of the cutting blade 56 in the width direction of the corrugated cardboard sheet 1, tan-1V2 / V1 is calculated. You may make it keep the angle of a blade surface and the supply direction of the corrugated cardboard sheet 1 tan-1V2 / V1.

As described above, as shown by a broken line in FIG. 8, the corrugated cardboard sheet is cut in a state of straddling the old-order trimming piece and the new-order trimming piece, and the trimming piece becomes a continuous band shape in the supply line direction.
Next, when it is detected in S15 that Ps has been passed, the slitter blade 20 is moved to the load level (S17), and the cutting blade 56 is moved to the unload level (S16). More specifically, when the piston 46 passes over the order change completion point Ps or reaches the end points P1-3 and P1-4 near the outside in the width direction of the cardboard sheet 1 with respect to the order change completion point Ps, the piston 46 To the unloading state in which the cutting blade 56 is separated from the cardboard sheet 1 together with the swivel member 60 via the bracket 64. In this case, it is preferable to move the cutting blade 56 to the unload level immediately after passing through Ps in order to reliably cut into the trimming piece of the new order. As a result, the positioning of the upper and lower slitter heads in the new order is completed at the order change completion point Ps. Therefore, the slitter blade 20 cuts the trim pieces T1-3 and T1-4. Thereafter, the processing on the new order is executed by the slitter 2. Note that when two sheets are taken from the corrugated cardboard sheet 1, some of the upper and lower slitter heads 20 are in a resting state at the unload level.

Here, as shown in FIG. 8, the cutting blades 56 on both sides are inclined in opposite directions, and simultaneously form a cutting line while moving in the width direction in a direction approaching each other in the width direction of the cardboard sheet. . As a result, the force in the sheet width direction applied to the sheet from the cutting blades 56 generated on both sides of the sheet cancels each other, and the corrugated sheet or the like hardly occurs.
When the trim pieces T1-1 and T1-2 cut in the old order reach the trim duct 4, the trim pieces T1-1 and T1-2 are sucked into the trim duct 4. When the order change is executed, the trim piece cut by the cutting blade 56 is sucked into the trim duct 4 continuously to the trim pieces T1-1 and T1-2. Following this trim piece, trim pieces T1-3 and T1-4 in the new order are sucked into the trim duct 4.

  Thus, since each trim piece T1-1, T1-2, T1-3, T1-4 is continuously sucked into the trim duct 4, it is possible to prevent the cardboard sheet 1 from jamming. If the start points P1-1, P1-2, end points P1-3, P1-4 are in the vicinity of the order change point Pe and the order change completion point Ps, they are broken and jammed when sucked into the trim duct 4 It is possible to inhale continuously without generating up. In this respect, since the positioning of the cutting blade 56 does not require high accuracy, it is possible to suppress an increase in cost of the positioning device.

  Although the embodiments of the present invention have been described in detail, those skilled in the art can make various modifications or changes without departing from the scope of the claims of the present invention. For example, in the present embodiment, a corrugated cardboard sheet is taken as an example, but the present invention is not limited to this, and is a sheet that is continuously supplied, and is a sheet that is picked up by an order change or a sheet picking width is changed. As long as it is, any sheet may be used. In the present embodiment, the method of combining the cutting trajectories in the order change with the circular thin blade with the variable blade surface angle is described. However, instead of the cutting blade 56 of the circular thin blade with the variable blade surface angle, the normal blade surface angle variable variable is used. A knife-shaped one can be used.

It is a schematic side view of the corrugator machine of an embodiment of the invention. It is a schematic front view of the slitter unit of embodiment of this invention. It is a schematic side view of the slitter blade unit of the slitter unit of FIG. It is a schematic front view of the trimming exclusive cutting device of the embodiment of the present invention. FIG. 5A is a schematic side view of the trimming-dedicated cutting device according to the embodiment of the present invention, and FIG. 5B is a plan view showing a turning state of the trimming cutting blade. It is a block diagram which shows an example of the control system of the slitter of FIG. It is a flowchart which shows the flow of a process in the control system of FIG. It is a schematic plan view which shows the cutting condition of the corrugated board sheet | seat cut | disconnected by the slitter of FIG.

Explanation of symbols

1 Corrugated sheet 2 Slitter unit 4 Trim duct 20 Slitter blade 24 Slitter blade unit 26 Frame 28 Beam 30 Beam 40 Servo motor 46 Piston 50 Speed sensor 51 Trim cutting device 52 Circular thin blade head 56 Cutting blade 58 Support shaft 65 Revolving shaft 71 Revolving shaft 131 I / O port 132 CPU
133 ROM
134 RAM
142 Slitter Blade Group Drive Unit 143 Trimming Cutting Device Unit 180 Host Production Management Device

Claims (4)

Using slitter unit, in the cutting method of cutting a workpiece continuous sheet fed continuously along the supply line,
Providing a single slitter unit having a plurality of slitter blades movable in the vertical direction and the sheet width direction;
Trimming cutting means provided on both sides of the sheet width direction with cutting blades that are movable in the vertical direction and the sheet width direction and that can pivot about a substantially vertical axis are spaced from the single slitter unit in the supply line direction. Providing a space between,
Providing a trim duct for sucking trimming pieces;
When changing the order from the old order to the new order, the slitter blade of the single slitter unit is allowed to escape vertically from the order change start point Pe of the old order , and the cutting blade of the cutting means dedicated for trimming is the order change start point. Moving toward the surface of the continuous sheet to be processed in the vertical direction at start points P1-1 and P1-2 close to the upstream side of Pe, and cutting the trim pieces of the old order;
Move the slitter blade of said single slitter units towards the surface of the workpiece continuous sheet in the vertical direction, thereby starting cutting the sheet in order change completion point Ps of the new order, the cutting edge of the trimming dedicated cutting means Escaping vertically from the trim pieces of the new order at end points P1-3 and P1-4 close to the downstream side of the order change completion point Ps ,
By moving the cutting blade of the trimming-dedicated cutting means from the start points P1-1 and P1-2 toward the end points P1-3 and P1-4 in the sheet width direction, trimming pieces of the old order and new orders A cutting method comprising cutting a sheet so as to straddle a trimming piece to form a continuous strip of trimming pieces . The cutting method according to claim 1, further comprising a step of cutting the cutting blade of the trimming-dedicated cutting means into a continuous sheet to be processed outside an inner line of trimming pieces of new and old orders. Further, the cutting blade of the trimming-dedicated cutting means has a disk shape, and has a rotation driving means for rotating about a substantially horizontal axis passing through the center of the disk-shaped cutting blade ,
When cutting the workpiece continuous sheet by the cutting edge of the trimming dedicated cutting means, based on the moving speed in the width direction of the workpiece continuous sheet cutting blade feeding speed and the trimming dedicated cutting means of the processing continuous sheet Adjusting the turning angle of the disc-shaped cutting blade ,
The cutting method according to claim 1 or claim 2. Providing the trimming-only cutting means, the single slitter unit , and the trim duct in the downstream direction of the supply line;
The cutting method according to claim 1.

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