Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
  • B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
  • B26D1/62—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder
  • B26D1/626—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder for thin material, e.g. for sheets, strips or the like
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed

Definitions

• the present invention relates to a cut-off method and apparatus for cutting a strip-shaped paper member such as a corrugated board in a corrugating machine for producing corrugated board sheets and the like, and a control apparatus therefor.
• Patent Document 1 Japanese Patent Laid-Open No. 2002-284430
• Patent Document 1 the force described in Patent Document 1 described above is merely torque-controlled by the controller 52 so that a pressing force for pressing the upper knife 55 against the lower knife 56 is generated. It is difficult to cut a strip-shaped paper member such as a corrugated cardboard sheet, and the rated output capacities (sizes) of the upper motor and the lower motor are different, resulting in an increase in the number of parts including the control device. .
• the present invention was devised in view of such problems, and appropriately distributes the torque necessary for cutting the strip paper member to both the upper (leading) motor and the lower (following) motor.
• the purpose is to reduce the types of parts by making the rated output capacities of the upper motor and lower motor the same.
• a cut-off method for a strip-shaped paper member according to the present invention.
• a helical follower, a follower with a knife attached, a knife cylinder, a preceding knife drive motor that rotationally drives the preceding knife cylinder, a follower, a follower that rotationally drives the knife cylinder, and a knife drive motor A cutting-off control device for individually controlling the leading knife driving motor and the trailing knife driving motor, and when cutting the strip paper member, the leading knife driving motor, the trailing knife, and the knife driving mode are provided.
• a predetermined amount of applied torque in a direction in which the leading knife and the follower knife come into contact with each other is applied to the leading knife and the follower knife by the cutter. And it said that there was Unishi.
• the method for cutting off the strip-shaped paper member according to the second aspect of the present invention is the method according to the first aspect, wherein the value of the applied torque applied by the leading knife driving motor and the trailing knife driving motor is provided. Are the same.
• a cut-off control device for a strip-shaped paper member wherein a leading knife drive motor that rotationally drives a leading knife cylinder to which a helical leading knife is attached and a helical follower and a knife are attached.
• the cut-off control device for the strip-shaped paper member for controlling the follow-up, the knife drive motor, and the knife drive motor, the preceding knife drive based on the input paper feed speed and the cut sheet length of the strip-shaped paper member.
• a speed pattern generator for generating a rotational speed pattern of the motor and the follower knife drive motor and outputting a speed command value; the speed command value from the speed pattern generator and the leading knife drive motor or the follower knife drive motor;
• a comparator for comparing the detection speed of the first knife driving motor and the rear knife driving motor based on a signal from the comparator.
• a command torque calculator for calculating the rotational torque command value of the knife drive motor, and a cutting torque for calculating the cutting torque of the preceding knife drive motor and the follower knife drive motor Applicable torque that distributes the cutting torque that has been transmitted and generates the applied torque pattern based on the paper feed speed and the cut sheet length of the belt-shaped paper member and outputs the applied torque command value
• a preceding power amplifier that controls the preceding knife drive motor based on the result calculated in step S3, the rotational torque command value calculated by the command torque calculator, and the applied torque command calculated by the applied torque pattern generator.
• the cutting torque calculated by the cutting torque calculator in the apparatus according to the third aspect is inputted. It is a cutting torque value necessary for cutting the strip-shaped paper member based on the basis weight of the paper member and the paper feed speed.
• the cut-off control device for the strip-shaped paper member according to the third or fourth aspect, wherein the cutting torque calculated by the cutting torque calculator is the leading knife and the follower. It is piled up against the cutting reaction force from the strip-shaped paper member applied to the knife, and the size is such that an appropriate contact force remains on the preceding knife and the follower knife.
• the cut-off control device for a strip-shaped paper member according to the present invention, wherein the force generated by the applied torque pattern generator is the device according to any one of the third to fifth aspects.
• the torque pattern is a rectangular, trapezoidal, or polygonal application pattern.
• the apparatus for controlling cut-off of a strip-shaped paper member according to claim 7 of the present invention is the apparatus according to any one of claims 3 to 6, wherein the applying torque pattern generator force is applied in accordance with the paper feeding speed. The torque pattern is changed.
• a cut-off control device for a belt-like paper member according to the present invention described in claim 8 is the device according to any one of claims 3 to 7, wherein the tip generated by the applied torque pattern generator is used.
• the applied torque patterns for the row knife drive motor and the follower knife drive motor are the same.
• the strip paper member cut-off control device is the device according to any one of claims 3 to 8, wherein the basis weight of the strip paper member and the cutting sheet length are input. And the basis weight of the strip paper member is output to the cutting torque calculator, and the rotation speeds of the leading knife cylinder and the follower knife cylinder are calculated based on the basis weight of the strip paper member and the cutting sheet length. It is connected to a production management device that outputs to the speed pattern generator.
• the strip-shaped paper member cut-off device cuts the belt-shaped paper member in cooperation with the preceding knife cylinder to which the helical leading knife is attached and the preceding knife.
• Helical follower, follower with knife attached, knife cylinder, preceding gear attached to one end of the rotating shaft of the preceding knife cylinder, and attached to one end of the rotating shaft of the follower knife cylinder A follow-up gear that meshes with the preceding gear, a preceding drive gear that meshes with the preceding gear, the follow-up gear, a follow-up gear that meshes with the gear, a drive gear, and a lead gear that rotationally drives the preceding drive gear
• a cut-off control device for individually controlling is provided.
• the cut-off device for a strip-shaped paper member according to the present invention as set forth in claim 11 is the device according to claim 10, wherein at least one of the preceding gear and the follower gear is the preceding knife and the follower knife. In the section in which the belt-like paper member is cut in cooperation, the teeth are notched so as not to contact the other of the preceding gear and the following gear.
• the apparatus for cutting a strip-shaped paper member according to the tenth aspect, wherein the leading knife and the trailing knife cooperate with at least one of the leading gear and the trailing gear.
• the teeth that mesh with the other of the preceding gear and the rear tracking gear are free of gear.
• the apparatus for cutting off a strip-shaped paper member according to the invention of claim 13 is the apparatus of claim 10.
• at least one of the preceding gear and the follower gear is configured so that the preceding gear after a predetermined section has passed from the start of cutting in a section in which the leading knife and the follower knife cooperate to cut the strip-shaped paper member.
• V is not in contact with the other of the follower gears, and the teeth are notched.
• the cut-off device for the strip-shaped paper member according to the fourteenth aspect of the present invention is the apparatus according to the tenth aspect, wherein at least one of the leading gear and the trailing gear includes the leading knife and the trailing knife. There is no tooth that meshes with the other of the preceding gear and the follower gear after the predetermined section has passed since the start of cutting in the section in which the belt-like paper member is cut in cooperation.
• the cut-off device for the belt-like paper member according to claim 15 is the device according to any one of claims 10 to 14, wherein the leading knife cylinder and the follower knife cylinder are made of carbon fiber reinforced plastic. It is a cylindrical member.
• the cut-off device for a strip-shaped paper member according to the present invention according to claim 16 is the device according to any one of claims 10 to 15, wherein the cut-off control device according to any one of claims 3 to 9 is used. It is characterized by having a device.
• the cut-off device for the strip-shaped paper member of the present invention cuts the strip-shaped paper member in cooperation with the leading knife cylinder to which the helical leading knife is attached, and the leading knife.
• Helical follower, follower with knife attached, knife cylinder, preceding gear attached to one end of the rotating shaft of the preceding knife cylinder, and attached to one end of the rotating shaft of the follower knife cylinder A follow-up gear that meshes with the preceding gear, a preceding drive gear that meshes with the preceding gear, the follow-up gear, a follow-up gear that meshes with the gear, a drive gear, and a lead gear that rotationally drives the preceding drive gear
• At least one of the preceding gear and the follower gear has a cutting start force in a section where the leading knife and
• the cut-off device for the strip-shaped paper member of the present invention cuts the strip-shaped paper member in cooperation with the leading knife cylinder to which the helical leading knife is attached, and the leading knife.
• Helical follower, follower with knife attached, knife cylinder, preceding gear attached to one end of the rotating shaft of the preceding knife cylinder, and attached to one end of the rotating shaft of the follower knife cylinder A trailing gear that meshes with the preceding gear, a preceding driving gear that meshes with the preceding gear, the trailing gear, a trailing gear that meshes with the gear, a driving gear, and a leading gear that rotationally drives the preceding driving gear.
• One of the preceding gear and the follower gear is connected to the preceding gear and the follower gear after a predetermined interval has passed from the start of cutting in a section in which the preceding knife and the follower knife cooperate to cut the belt-like paper member. It is characterized in that there is no tooth that meshes with the other side of the gear.
• the belt-shaped paper member can be accurately cut. Can do. Then, by applying each of the applied torques, the knife edges of each knife are squeezed together, and the strip-shaped paper member is cut so that the knife edge of one knife and the knife edge of the other knife come into contact with each other. As a result, the cutting load can be reduced compared to the case of cutting by applying a preload to the cutting edge with a highly rigid knife cylinder as in the past. In addition, the rigidity of the knife cylinder and GD 2 can be reduced, and the capacity of each knife drive motor can be greatly reduced. Furthermore, since the strip-shaped paper member is cut so that one blade edge and the other blade edge are in contact with each other, the blade alignment can be adjusted roughly (simple).
• the applied torques applied by the leading knife driving motor and the follower knife driving motor are offset when the strip-shaped paper member is cut. Therefore, it does not affect the paper feed of the strip paper member. The paper sheet member can be cut more accurately.
• the cutting torque necessary for cutting the strip-shaped paper member is distributed by the applied torque pattern generator and the leading knife driving motor or the trailing and knife driving motor is controlled,
• the belt-like paper member can be cut accurately without affecting the paper feed of the belt-like paper member.
• the cutting torque can be changed according to the basis weight of the strip-shaped paper member and the paper feed speed.
• the effect of the invention according to any one of claims 3 to 6 is reduced, and the rotational speed of the leading knife driving motor and the trailing knife driving motor is low or moderate.
• the speed is high, a flat application pattern is formed, and when the speed is high, a rectangular shape is formed.
• the optimum strip-shaped paper member can be cut according to the paper feed speed.
• the applied torque pattern for the leading knife drive motor and the follower knife drive motor is made the same as the effect of the invention according to any one of claims 3 to 7.
• the effect of the invention of any one of claims 3 to 8 is changed, and in the production management device, the basis weight of the strip-shaped paper member to be cut and the cutting sheet length are changed.
• the cutting load can be changed according to the basis weight of the belt-like paper member, compared to the case where a cutting load equivalent to the maximum basis weight has always been applied, so that the wear of each knife is reduced and the service life is extended. be able to.
• leading knife driving motor and the trailing knife drive motor Is synchronized or accelerated and decelerated, and the leading gear and the trailing gear are engaged with each other.
• leading gear and the trailing gear are not meshed with each other. Therefore, the leading knife driving motor and the trailing knife driving motor can be controlled individually, and an appropriate cutting force can be obtained. It can be done.
• FIG. 1 is a schematic front view showing a cutoff device according to an embodiment of the present invention.
• FIG. 2 is a cross-sectional view taken along the line AA in FIG.
• FIG. 3 is a schematic side view showing the state of the upper and lower gears at the time of starting cutting with the upper and lower knives of the cutoff device according to the embodiment of the present invention.
• FIG. 4 is a schematic side view showing the state of the upper and lower gears at the end of cutting with the upper and lower knives of the cutoff device according to the embodiment of the present invention.
• FIG. 5 is a control block diagram of a cutoff control device according to an embodiment of the present invention.
• FIG. 6 (A) to FIG. 6 (E) are diagrams showing control patterns of each knife drive motor according to the embodiment of the present invention.
• FIG. 7 is a diagram showing another example of the applied torque pattern of each knife drive motor according to the embodiment of the present invention.
• FIG. 8 is a schematic front view showing a conventional cutoff device.
• FIG. 1 is a schematic front view showing a cut-off device according to an embodiment of the present invention
• FIG. 2 is a cross-sectional view taken along line AA in FIG.
• FIG. 3 is a schematic side view showing the state of the upper and lower gears at the time of starting cutting by the upper and lower knives of the cutoff device according to the embodiment of the present invention
• FIG. 4 is a cut according to the embodiment of the present invention. It is a typical side view which shows the state of the up-and-down gear at the time of completion
• FIG. 5 is a control block diagram of the cutoff control device according to the embodiment of the present invention
• FIGS. 6 (A) to 6 (E) show control patterns of the knife drive motors according to the embodiment of the present invention.
• FIG. 7 and FIG. 7 are diagrams showing another example of the applied torque pattern of each knife drive motor according to the embodiment of the present invention.
• FIGS. 1 and 2 the configuration of a cut-off device according to an embodiment of the present invention for cutting a strip-shaped paper member D such as a cardboard web in a corrugating machine for manufacturing a cardboard sheet or the like will be described.
• a cut-off device for cutting a strip-shaped paper member D such as a cardboard web in a corrugating machine for manufacturing a cardboard sheet or the like.
• parallel rotation shafts 6 and 7 are provided through the left and right frames 1 and 1, respectively.
• the rotary shafts 6 and 7 are made of metal and have high rigidity.
• a cylindrical upper (leading) knife cylinder 2 and a lower (following) knife cylinder 3 are attached via radial struts, respectively.
• the upper knife cylinder 2 and the lower knife cylinder 3 are made of, for example, CFR P (carbon fiber reinforced plastics, abbreviated as carbon fiber) having high rigidity and low GD 2 (rotational inertial force).
• the knife 4 is helically attached, and on the outer periphery of the lower knife cylinder 3, the teeth are circumferential.
• a downward (follow-up) knife 5 is attached in a helical shape.
• the upper knife 4 and the lower knife 5 cooperate, that is, the strip-shaped paper member D is sandwiched between the upper knife 4 and the lower knife 5, and the upper knife While pressing 4 and the lower knife 5 against each other, the point where the blade edge is in contact is moved to the other end side to cut the belt-like paper member D.
• S is the start end (engagement start point) of the upper and lower knives
• E is the end point (engagement end point) of the upper and lower knives.
• the upper knife 4, the lower knife 5, the upper knife cylinder 2, the lower knife cylinder 3, and the rotating shafts 6 and 7 may have the following structure.
• the upper knife cylinder 2 and the lower knife cylinder 3 have a shape (or integral formation) in which a carbon fiber reinforced plastic disc-shaped lid is attached to both ends of a hollow cylindrical member made of carbon fiber reinforced plastic. To do.
• metal rotating shafts 6 and 7 are fixed by bonding and / or bolts and nuts, respectively.
• a cylindrical upper knife cylinder 2 made of carbon fiber reinforced plastic a lower knife cylinder Attach a mounting base made of aluminum, iron, or carbon fiber reinforced plastic to the surface of da 3, and attach upper knife 4 and lower knife 5 on the mounting base with bolts and nuts in a helical shape.
• the rotating shafts 6 and 7 with metal lids may be fixed to both ends of the hollow cylindrical upper knife cylinder 2 and the lower knife cylinder 3 made of carbon fiber reinforced plastic, respectively.
• An upper (preceding) gear 8 composed of split gears 8a and 8b is attached to one end (right side in FIG. 1) of the rotating shaft 6, and an upper gear is mounted on one end (right) of the rotating shaft 7.
• a lower (follow-up) gear 9 is fitted to 8 and fitted.
• These two split gears 8a and 8b are slightly fixed in the rotational direction and fixed to the rotary shaft 6 with bolts or the like.
• the upper gear 8 may be a single gear and the lower gear 9 may be two split gears. Further, the upper gear 8 or the lower gear 9 does not necessarily need to be two gears, and both may be a single gear.
• the upper gear 8 is connected to an upper (preceding) knife drive motor 12 via an upper (preceding) drive gear 10 that meshes with the upper gear 8, and the lower gear 9 is coupled to the lower (following) drive.
• a lower (follow-up) knife drive motor 13 is connected via a gear 11.
• These knife drive motors 12 and 13 are torque motors having the same rated capacity and output, and are individually controlled by a cutoff control device 20.
• an encoder 14 for detecting the rotational speed of the motor is attached to one of the rotating shafts of the lower knife driving motor 13, for example.
• the upper gear 8 and the lower gear 9 described above have the following characteristics. That is, the upper gear 8 and the lower gear 9 are in mesh with each other so as not to have backlash as described above as long as the upper knife 4 and the lower knife 5 do not contact each other. As shown in FIGS. 3 and 4, in the range in which the upper knife 4 and the lower knife 5 are in contact with each other for cutting (the range from the cutting start point C force to the cutting end point O), at least the split gears 8a and 8b. The side force that is confronted when pressure (applying) torque Txat, Txbt is applied to the side of either tooth is cut as shown by hunting in Figs.
• the upper knife drive motor 12 and the lower knife drive motor 13 can be reliably synchronized.
• the upper gear 8 and the lower gear Since the upper knife drive motor 12 and the lower knife drive motor 13 are individually controlled, it is possible to give an appropriate pressing force between the upper knife 4 and the lower knife 5, Appropriate cutting force for the strip-shaped paper member D can be obtained.
• the teeth around the entire circumference of one gear may be made thin overall.
• a predetermined length from the start end S of the upper and lower knives of the upper gear 8 and the lower gear 9 (the length of the upper and lower knife blade tips in the cylinder axial direction) Q It is preferable that the range (predetermined section) corresponding to is not cut out (or left out). In other words, it corresponds to the predetermined length Q from the starting end S of the upper and lower knives of the upper gear 8 and the lower gear 9
• the backlash is not provided in the range to be applied, and the backlash is provided in the range from the predetermined length Q to the end E of the force up and down knife.
• the predetermined length Q is preferably in the range of, for example, about 100 to 200 mm from the beginning of the upper and lower knives.
• FIG. 3 and 4 are schematic diagrams, and the upper knife 4 and the lower knife 5 are illustrated apart from each other, but actually, as shown in FIG. And the lower knife 5 are located in the vicinity of the teeth of the upper gear 8 or the lower gear 9, and the cutting edges of the upper knife 4 and the lower knife 5 are in contact with each other.
• the upper knife 4 has a vertical tooth shape and the lower knife 5 has a horizontal tooth shape.
• the present invention is not limited to this. Even if the teeth are reversed, both may be vertical teeth or horizontal teeth.
• FIG. 5 FIG. 6 (A) to FIG. 6 (E), and FIG. 7, a strip shape of corrugated cardboard web or the like in a corrugated machine for producing a corrugated cardboard sheet or the like according to an embodiment of the present invention.
• the cut-off control device 20 for cutting the paper material D will be described in detail.
• a corrugating machine that manufactures corrugated cardboard sheets, etc. is provided with a production management device 40 that manages and controls the overall production of the corrugating machine.
• the production management device 40 has a basis weight W (or material, thickness, width, etc.) of the strip-shaped paper member D such as a corrugated cardboard sheet, a length L of the sheet to be cut, a paper feed speed Vs (or per unit time).
• a keyboard input unit for inputting the number of cuts
• a display screen for storing various data
• an arithmetic processing unit (CPU) etc. Then, by inputting the basis weight W of the strip-shaped paper member D such as a corrugated board sheet to be cut, the cutting sheet length L, etc. from the keyboard, various setting values can be changed.
• a paper not shown for feeding the strip-shaped paper member D such as a cardboard web to the cut-off device is provided with a paper feeding control device 41. Based on the paper feeding speed Vs transmitted from the production management device 40, the paper feeding control device 41 controls the paper feeding speed of the strip paper member D.
• the cut-off device is provided with a cut-off control device 20, and the cut-off control device 20 generates a drive current to the command value calculation unit 21 for generating various patterns and the upper knife drive motor 12.
• An upper (preceding) knife speed control unit 30 to be controlled and a lower (following) knife speed control unit 35 to control a driving current to the lower knife driving motor 13 are configured. Then, the paper feed speed Vs, the cut sheet length L, and the basis weight W of the belt-like paper member D are transmitted from the production management device 40 to the cut-off control device 20.
• the command value calculation unit 21 calculates a speed pattern generator 24 that generates a speed pattern, an applied torque pattern generator 25 that generates a torque pattern for cutting the strip-shaped paper member D, and calculates a torque necessary for cutting. It is comprised from the cutting torque calculator 23 to perform.
• the speed pattern generator 24 receives the paper feed speed Vs and the cut sheet length L of the strip-shaped paper member D from the production management device 40, and generates the speed pattern shown in FIG. 6 (A). That is, from the paper feed speed Vs and the cutting sheet length, the joining start time tl of the upper knife 4 and the lower knife 5 in one cycle, the cutting start time tc, the cutting completion time to, and the time when the joining is completed and deceleration starts t2. Calculate the time t3 when the deceleration is completed and the standby is started, and the cycle completion time t4.
• the speeds in the speed increasing process (between tO and tl), the knife jointing (between tl and t2), the deceleration process (between t2 and t3), and the standby process (between t3 and t4) are also calculated.
• the speed may be zero during the standby time (the time between t3 and t4). Also, when the cut sheet length L, where the paper feed speed Vs is fast, is short, the waiting time (time between t3 and t4) is faster than the speed of cutting time (time between tc and to). It can be fast. In this way, the speed pattern shown in FIG. 6A is generated, and the generated speed pattern is stored in a storage device (not shown). Further, the cutting start time tc and the cutting completion time to are transmitted to the applied torque pattern generator 25.
• the position calculator 22 receives the detection speed St detected by the encoder 14 attached to the lower knife drive motor 13, and integrates the detection speed St.
• the current position Pt of the upper knife 4 and the lower knife 5 and the start of one cycle Calculate elapsed time t with tO force.
• the speed pattern generator 24 calculates a speed command value Vt at the elapsed time t based on the stored speed pattern.
• the calculated speed command value Vt is transmitted to the comparator 31.
• the cutting torque calculator 23 receives the paper feed speed Vs and the basis weight W of the belt-like paper member D from the production management device 40, and the upper knife drive motor 12 and the lower knife drive motor 13 receive the basis weight. Calculate the cutting torque (Txa + Txb) necessary to cut the belt-shaped paper member D of amount W at the paper feed speed Vs.
• the cutting torque (Txa + Txb) is changed as the basis weight W, paper feed speed Vs, and width B of the strip-shaped paper member are changed. Furthermore, the cutting torque (Txa + Txb) value is piled on the cutting reaction force from the strip-shaped paper member D applied to the upper knife 4 and the lower knife 5, and an appropriate contact force is applied to the upper knife 4 and the lower knife 5.
• the size is such that the remains. This contact force is preferably about 100-30 Okgf in the horizontal direction.
• the applied torque pattern shown in FIG. 6C is generated and stored in a storage device (not shown).
• the applied torque pattern shown in FIG. 6 (C) shows a case where the cutting torque Txa required for the upper knife drive motor 12 and the cutting torque Txa required for the lower knife drive motor 13 are equal and rectangular. Yes.
• the applied torque pattern may have a trapezoidal shape that increases and decreases between tl and tc and between to and t2.
• the cutting torques Txa and Txb may be applied from a time before the joining start time tl of the upper and lower knives (for example, immediately before the upper and lower knives start joining). As described above, no backlash is provided in the range corresponding to the predetermined length Q from the starting end S of the upper and lower knives of the upper gear 8 and the lower gear 9, and the force is removed by removing the predetermined length Q. Knocklash should be provided in the range up to the end E of the upper and lower knives.
• the absolute value of the cutting torque Txa is equal to the absolute value of the cutting torque Txb (that is, the applied torque pattern to be applied to the upper knife driving motor 12 and the lower knife driving motor 13 is the opposite in the positive direction but the shape is the same). This makes it possible to accurately cut the belt-like paper member D that does not affect the paper feed of the belt-like paper member D when the belt-like paper member D is cut.
• the rectangular applied torque pattern in FIG. 6C is when the cutting speed (paper feed speed Vs) is low or medium speed, and the applied torque is constant in the entire speed range. .
• the applied torque pattern shown in FIG. 7 can be used. That is, when the cutting speed is high, the lower knife 5 will be described.
• the cutting torque 1.25'Txa this is 1.25 times the cutting torque required at the cutting start time tc). (Referred to as initial high cutting torque).
• the polygonal applied torque pattern is as follows. By using a polygonal applied torque pattern in this way, accurate cutting is possible even when the cutting speed is high.
• the force-up knife drive motor 12 showing the application pattern of the lower knife drive motor 13 is also applied in the same shape with the opposite signs. It should be noted that the applied torque pattern may be any shape other than the above-described rectangular shape or uneven shape.
• the initial high cutting torque is 1.1 to 1.5 times the cutting torque (1.1-Txa to 1.5'Txa)
• the medium-term low cutting torque is 0.6 to 0. 9 times the cutting torque (0.6 'Txa to 0.9 ⁇ Txa)
• the final steady cutting torque is 0.9 to 1.1 times the cutting torque (0.9' Txa to l. L 'Txa) can do.
• the application torque command values Txat and Txbt at the elapsed time t transmitted from the position calculator 22 are calculated, and the application to the upper sub drive motor 12 is applied to the torque subtractor 33.
• the torque command value Txbt is transmitted, and the torque command value Txat applied to the lower knife drive motor 13 is transmitted to the torque adder 36.
• the comparator 31 receives the speed command value Vt transmitted from the speed pattern generator 24 and the detected speed St transmitted from the encoder 14 and compares them. Then, the speed deviation Vt—St to be increased or decreased as the calculation result is transmitted to the command torque calculator 32.
• the command torque calculator 32 receives the increase / decrease speed Vt—St transmitted from the comparator 31 and calculates the rotational torque command value Tt to be output to the upper knife drive motor 12 and the lower knife drive motor 13.
• the calculated rotational torque command value Tt is output to the torque subtractor 33 and the torque adder 36.
• the output pattern of the rotational torque command value Tt has a pattern as shown in FIG. In this way, feedback control is performed by the comparator 31 and the command torque calculator 32.
• the torque subtracter 33 receives the rotation torque command value Tt transmitted from the command torque calculator 32 and the applied torque command value Txbt transmitted from the applied torque pattern generator 25 and subtracts both of them. Then, the output torque command value Tt Txbt to be output by the upper knife drive motor 12 is transmitted to the upper (preceding) power amplifier 34.
• the output torque command value Tt ⁇ T xbt has a pattern as shown in FIG.
• the upper power amplifier 34 calculates the output current based on the output torque command value Tt ⁇ Txbt, and outputs the drive current to the upper knife drive motor 12.
• the torque adder 36 receives the rotational torque command value Tt transmitted from the command torque calculator 32 and the applied torque command value Txat transmitted from the applied torque pattern generator 25 and adds them together. Then, the output torque command value Tt + T xat to be output by the lower knife drive motor 13 is transmitted to the lower (follow-up) power amplifier 37.
• the output torque command value Tt + T xat has a pattern as shown in FIG.
• the lower power amplifier 37 calculates the output current based on the output torque command value Tt + Txat and drives the lower knife drive motor 13 to drive it. Outputs dynamic current.
• the applied torque command values Txat, Txbt are based on the torques Ta, Tb, Tc, Td required for motor acceleration / deceleration. Since the upper knife drive motor 12 and the lower knife drive motor 13 have a cutting force, it is not necessary to increase the rated capacity of each motor. Also, the upper power amplifier 34 and the lower power amplifier 37 can have the same rated capacity.
• the upper knife drive motor 12 and the lower knife drive motor 13 performs synchronous operation.
• the upper knife drive motor 12 retracts the upper knife 4 as shown in FIG. A force is applied in the direction, that is, the direction in which the lower knife 5 is pushed.
• the lower knife drive motor 13 applies a force in the direction in which the lower knife 5 is advanced as shown in FIG. 3, that is, the direction in which the upper knife 4 is pushed.
• the upper knife drive motor 12 and the lower knife drive motor 13 apply the applied torque in the direction in which the upper knife 4 and the lower knife 5 come into contact with each other, and the cutting force of the strip-shaped paper member D is generated.
• the applied torque command values Txat and Txbt to be applied to the upper knife drive motor 12 and the lower knife drive motor 13 are set to be the same so that they are applied to the upper knife drive motor 12 and the lower knife drive motor 13. Since the applied torque is offset, no force to increase or decrease the paper feed speed Vs is generated against the strip paper member D, and only the force necessary for cutting is applied without affecting the paper feed speed Vs. Therefore, it is possible to cut the belt-like paper member D with high accuracy and accuracy.
• the clearance between the upper knife 4 and the lower knife 5 can be within an allowable range and the cutting force can be easily adjusted. And ensure proper cutting.
• the pressing force necessary for cutting can be appropriately applied by the knife drive motors 12 and 13, and the upper knife cylinder 2 or the lower knife cylinder 3 Rotating inertia force of small As a result, the capacity of each knife drive motor 12, 13 and each power amplifier 34, 37 can be reduced.
• the present invention has been described with respect to the cutoff device and the control device thereof according to the embodiment of the present invention.
• the present invention is not limited to the above-described embodiment, and the specific embodiments are within the scope of the present invention.
• various changes may be made to the structural structure.
• the above is the force that precedes the upper knife 4 and follows the lower knife 5 etc.
• the lower knife 5 is preceded by the preceding knife and the upper knife is followed!
• Follow-up good as a knife.
• the subtractor 33, the lower knife speed control unit 35, the command torque adder 36, etc. are not only configured by an electric circuit, but also the computer program (or sequence) as a whole, and the above-described arithmetic unit, generation This includes cases in which a controller, a controller, a comparator, an adder / subtracter, etc. are configured by a subprogram (or subsequence).
• the strip-shaped paper member such as a corrugated cardboard sheet can be accurately cut, and its usefulness is considered to be extremely high.

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• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Making Paper Articles (AREA)
• Details Of Cutting Devices (AREA)
• Nonmetal Cutting Devices (AREA)

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Citations (3)

• 2005
  • 2005-04-28 WO PCT/JP2005/008184 patent/WO2006027870A1/ja active Application Filing
  • 2005-04-28 JP JP2006535030A patent/JP4264450B2/ja not_active Expired - Fee Related
  • 2005-04-28 EP EP05736741.9A patent/EP1787772B1/de not_active Expired - Fee Related

Patent Citations (3)

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