WO2006027870A1

WO2006027870A1 - Method and device for cutting off band-like paper member and controller of the device

Info

Publication number: WO2006027870A1
Application number: PCT/JP2005/008184
Authority: WO
Inventors: Hiroshi Ishibuchi; Satoru Matsuda; Kuniaki Wakusawa; Katsuaki Takasaki
Original assignee: Mitsubishi Heavy Industries, Ltd.
Priority date: 2004-09-08
Filing date: 2005-04-28
Publication date: 2006-03-16
Also published as: JP4264450B2; EP1787772A4; EP1787772B1; EP1787772A1; JPWO2006027870A1

Abstract

A method and a device for cutting off a band-like paper member and a controller of the device. The device capable of accurately cutting off the band-like paper member such as a corrugated fiber sheet by properly distributedly imparting a torque necessary for cutting off the band-like paper member to both a preceding motor and a follow-up motor comprises a preceding knife cylinder (2) to which a helical preceding knife (4) is fitted, a follow-up knife cylinder (3) to which a helical follow-up knife (5) cutting off the band-like paper member (D) in association with the preceding knife (4) is fitted, a preceding knife drive motor (12) rotatingly driving the preceding knife cylinder (2), a follow-up knife drive motor (13) rotatingly driving the follow-up knife cylinder (3), and a cutoff controller (20) individually controlling the preceding knife drive motor (12) and the follow-up knife drive motor (13). When the band-like paper member (D) is cut off, specified amounts of imparting torques in a direction for bringing the preceding knife (4) into contact with the follow-up knife (5) are imparted to the preceding knife (4) and the follow-up knife (5) by the preceding knife drive motor (12) and the follow-up knife drive motor (13).

Description

Method and apparatus for cutting off strip-shaped paper member and control apparatus therefor

Technical field

TECHNICAL FIELD [0001] 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. Background art

Conventionally, attempts have been made to reduce the rigidity of a knife cylinder and to always apply a constant pressing force between knives in a corrugating machine cut-off device. For example, as shown in FIG. 8, an upper knife cylinder 53 to which an upper knife 55 and split gears 8a and 8b are attached, a lower knife 56 and a split gear 8a, which cut the cardboard web in cooperation with the upper knife 55, A lower knife cylinder 54 fitted with a lower gear 9 that meshes with 8b, a main drive motor 51 that rotates each knife cylinder 53, 54, an auxiliary drive motor 50, and a controller 52 that controls the drive motor 51, 50 In addition, a gap is formed between the teeth of the split gears 8a, 8b and the teeth of the lower gear 9, and the drive motor 51 is driven by the controller 52. , 50 to control at least one of the upper and lower knives 55, 56 so that a pressing force is applied between the knives 55, 56 (for example, Patent Document 1). O)

Patent Document 1: Japanese Patent Laid-Open No. 2002-284430

Disclosure of the invention

Problems to be solved by the invention

[0003] However, 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. .

[0004] 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. Give It is an object of the present invention to provide a strip paper member cut-off method and apparatus, and a control device thereof, which can accurately cut a strip paper member such as a corrugated cardboard sheet. Furthermore, the purpose is to reduce the types of parts by making the rated output capacities of the upper motor and lower motor the same.

Means for solving the problem

[0005] For this reason, according to the first aspect of the present invention, there is provided 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.

[0006] 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.

According to a third aspect of the present invention, there is provided a cut-off control device for a strip-shaped paper member according to the present invention, 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. In 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 command generator, a command torque subtractor that subtracts the applied torque command value output from the applied torque pattern generator, and a command torque subtractor that also calculates the rotational torque command value force calculated by the command torque calculator. 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. A command torque adder for adding the value and the follower knife drive mode based on the result calculated by the command torque adder. After controlling the add V, characterized by comprising a power amplifier.

[0007] According to a fourth aspect of the present invention, in the apparatus for controlling a strip-shaped paper member of the present invention, 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.

According to a fifth aspect of the present invention, there is provided 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.

[0008] According to a sixth aspect of the present invention, there is provided 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.

[0009] 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 according to claim 9 of the present invention 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.

[0010] The strip-shaped paper member cut-off device according to the tenth aspect of the present invention 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 knife drive motor, a follower drive gear, and a follower drive motor, the follower drive gear, and the preceding knife drive motor having the same rated capacity as the preceding knife drive motor. A cut-off control device for individually controlling is provided.

[0011] 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.

According to a twelfth aspect of the present invention, there is provided 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. In the section where the belt-like paper member is cut, the teeth that mesh with the other of the preceding gear and the rear tracking gear are free of gear.

[0012] The apparatus for cutting off a strip-shaped paper member according to the invention of claim 13 is the apparatus of claim 10. In this case, 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. And V is not in contact with the other of the follower gears, and the teeth are notched.

[0013] 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.

[0014] 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.

[0015] The cut-off device for the strip-shaped paper member of the present invention according to claim 17 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 A knife drive motor, a follow-up drive that rotationally drives the follow-up drive gear, a knife drive motor, and a cut-off control device that individually controls the follow-up drive motor and the preceding knife drive motor 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 follower knife cooperate to cut the belt-shaped paper member, and then the preceding gear and The teeth are notched so that the follow-up is not in contact with the other of the gears! /. [0016] The cut-off device for the strip-shaped paper member of the present invention according to claim 18 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. A knife drive motor, a follow-up drive that rotationally drives the follow-up drive gear, a knife drive motor, and a cut-off control device that individually controls the follow-up drive motor and the preceding knife drive motor 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 invention's effect

[0017] The invention according to each claim described in the claims has the following effects.

According to the first aspect of the present invention, since a predetermined amount of applied torque in the direction of contacting both the leading knife driving motor, the follower knife, and the knife driving motor is applied, 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).

[0018] According to the invention of claim 2, in addition to the effect of the invention of claim 1, 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.

According to the invention of claim 3, since 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.

According to the invention of claim 4, in addition to the effect of the invention of claim 3, the cutting torque can be changed according to the basis weight of the strip-shaped paper member and the paper feed speed.

According to the invention according to claim 5, in addition to the effect of the invention according to claim 3 or 4, since a contact force is generated between the leading knife and the trailing knife when the strip paper member is cut. The cutting edge gap between the leading and trailing knives can be kept below the limit that can be cut.

[0020] According to the invention of claim 6, in addition to the effect of the invention of any one of claims 3 to 5, it is possible to select an appropriate application pattern according to the paper feed speed.

According to the invention according to claim 7, 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. When the speed is high, a flat application pattern is formed, and when the speed is high, a rectangular shape is formed. Thus, the optimum strip-shaped paper member can be cut according to the paper feed speed.

[0021] According to the invention according to claim 8, 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. As a result, when the belt-like paper member is cut, the belt-like paper member can be accurately cut without affecting the paper feed of the belt-like paper member.

According to the invention of claim 9, 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. Is possible. In addition, 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.

[0022] According to the invention of claim 10, by setting the rated capacities of the leading knife driving motor and the trailing knife driving motor to be the same, not only the driving motor but also the performance of the cutoff control device. ヮ -Amplifiers can have the same capacity.

According to the invention of claim 11 and claim 12, when the leading knife and the trailing knife are not in contact with the effect of the invention of claim 10, the 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. In addition, when the belt-shaped paper member is contacted and cut, the 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.

[0023] According to the inventions of claims 13 and 14, when the engagement of the leading knife and the trailing knife starts, the trailing knife can be prevented from preceding the leading knife (reverse blade). As a result, both knives can be prevented from being damaged, and high quality and accurate cutting can be performed.

According to the invention according to claim 15, in addition to the effect of the invention according to any one of claims 10 to 14, the rotational inertia force of the leading knife cylinder and the trailing knife cylinder can be reduced, and rapid control becomes possible. .

[0024] According to the invention of claim 16, in addition to the effect of the invention of any one of claims 10 to 15, the effect of any one of claims 3 to 9 is achieved. .

According to the inventions according to claims 17 and 18, at the start of engagement of the leading knife and the trailing knife, it is possible to prevent the trailing knife from preceding the leading knife (reverse blade). As a result, both knives can be prevented from being damaged, and high quality and accurate cutting can be performed.

Brief Description of Drawings

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.

[8] FIG. 8 is a schematic front view showing a conventional cutoff device.

Explanation of symbols

1 frame

2 Upper (leading) knife cylinder

3 Bottom (follow-up) knife cylinder

4 Top (lead) knife

5 Down (follow-up) knife

6, 7 Rotation axis

8 Top (lead) gear

8a, 8b Spige gear

9 Down (follow-up) gear

10 Top (leading) drive gear

11 Down (follow-up) drive gear

12 Top (Leading) Knife drive motor

13 Bottom (follow-up) knife drive motor

14 Encoder

20 Cut-off control device

21 Command value calculator

22 Position calculator

23 Cutting torque calculator

24 speed pattern generator

25 Applied torque pattern generator

30 Top (Leading) Knife speed controller 31 Comparator

32 Command torque calculator

33 Command torque subtractor

34 Upper (leading) power amplifier

35 Down (follow-up) knife speed control

36 Command torque adder

37 Lower (follow-up) power amplifier

40 Production management device

41 Paper feed control device

D Strip paper

C Cutting start point

0 Cutting end point

S Start of upper and lower knives (engagement start point)

E End of upper and lower knives (engagement end point) tl Join start time

t2 Time to start deceleration

t3 Time to start waiting

t4 1 cycle completion time

tc Disconnection start time

to Disconnection completion time

Vs Paper feed speed

L Cutting sheet length

W Basis weight

B Width of strip paper member

Pt Current position

Tt Rotation torque command value

vt Speed command value

Txa, Txb cutting Txat, Txbt Applied torque command value

St detection speed

Q Specified length

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

FIG. 1 is a schematic front view showing a cut-off device according to an embodiment of the present invention, and 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, and 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 | finish of cutting by the up-and-down knife of an OFF apparatus. FIG. 5 is a control block diagram of the cutoff control device according to the embodiment of the present invention, and 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.

[0028] First, based on 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. . As shown in FIGS. 1 and 2, 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.

[0029] On the outer periphery of the rotary shafts 6 and 7, 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). By making the rotary shafts 6 and 7 and the upper knife cylinder 2 and the lower knife cylinder 3 etc. have the above-mentioned shapes and materials, the GD ² is reduced, so that responsiveness is good and rapid rotation control becomes possible.

[0030] That is, the conventional, strip-shaped upper knife cylinder 2 and the lower knife cylinder 3 larger cities of GD ^2, and its rotational inertia force, by generating a preload load Mase oar one of the upper and lower knife The pressing force required to cut the paper member D was obtained. As will be described later, the upper (leading) knife drive motor 12 and the lower (following) knife drive motor 13 applied the applied torque. Since the cutting force is obtained, it is possible to make the upper knife cylinder 2 and the lower knife cylinder 3 small in GD ² (rotational inertia force).

[0031] On the outer periphery of the upper knife cylinder 2, a vertical tooth shape with teeth facing radially outward (preceding) 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. When cutting the strip-shaped paper member D such as a cardboard web, 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. In FIGS. 1 and 2, S is the start end (engagement start point) of the upper and lower knives, and E is the end point (engagement end point) of the upper and lower knives.

[0032] In the prior art, cutting was performed by applying a preload to the cutting edge with a highly rigid knife cylinder. Since the cutting edges of the knives 4 and 5 are cut together to cut the strip-shaped paper member D, the cutting load is greatly reduced and the blade alignment can be adjusted roughly (simple). Further, as will be described later, by applying each of the applied torques, the rigidity of each of the knife cylinders 2 and 3 and GD ² can be reduced, and the capacity of each of the knife drive motors 12 and 13 can be greatly reduced. In addition, the cutting load (applied torque) can be changed according to the basis weight of the strip-shaped paper member D, compared to the conventional case where a cutting load equivalent to the maximum basis weight is always applied. Lifespan can be increased.

In FIG. 2, the forces shown by exaggerating the upper knife 4 and the lower knife 5 are actually the diameters of the upper knife cylinder 2 and the lower knife cylinder 3 being considerably large. A helical recess (dent) is provided in a part of the lower knife cylinder 3, and an upper knife 4 and a lower knife 5 are attached to the recess.

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. In other words, 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. At the center of the lids at both ends, metal rotating shafts 6 and 7 are fixed by bonding and / or bolts and nuts, respectively. And 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. Further, 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.

[0034] 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. When the upper knife 4 and the lower knife 5 are not in contact with each other, sometimes the lower gear 9 and It is now possible to prevent backlash! 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.

[0035] 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. Further, 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.

[0036] 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. In this way, at least in the range from the cutting start point C force to the cutting end point O, the force of contact between the cutting edge of the upper knife 4 and the cutting edge of the lower knife 5 The teeth of the upper gear 8 and the lower gear 9 are not in contact with each other. It has become. Note that the cutting start point C and the cutting end point O vary according to the width B of the belt-like paper member D. Therefore, in practice, the upper and lower knives of the upper gear 8 and the lower gear 9 are hatched in FIGS. 3 and 4 within the range up to the end (engagement start point) S of the upper and lower knives. Cut it as shown.

With the above-described configuration, when the upper knife 4 and the lower knife 5 are not in contact, the upper knife drive motor 12 and the lower knife drive motor 13 can be reliably synchronized. When the upper knife 4 and the lower knife 5 are brought into contact with each other to cut the belt-like paper member D (or when the upper knife 4 and the lower knife 5 are in contact), 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.

[0038] When the upper gear 8 and the lower gear 9 are a single gear, the range up to the cutting start point C force cutting end point O of at least one of the upper gear 8 and the lower gear 9 (or The tooth side of the upper and lower knives from the starting edge (engagement start point) S to the upper and lower knives end (engagement end point) E is scraped. Furthermore, it is possible to delete teeth in the range from the cutting start point C force to the cutting end point O of at least one of the upper gear 8 and the lower gear 9, and at least either the upper gear 8 or the lower gear 9 is acceptable. The teeth around the entire circumference of one gear may be made thin overall.

[0039] However, when the range from the top end S of the upper and lower knives to the end E of the upper and lower knives of the upper gear 8 and the lower gear 9 is cut (or missing) as described above (ie, the upper gear 8 and the lower gear 9). 9 When the upper and lower knives start edge S to the upper and lower knives end E are provided with a backlash), when the upper and lower knives are engaged, the lower knife (follower, knife) 5 is the upper knife (leading knife) It is conceivable that it is ahead of 4 (that is, “back blade” occurs). In particular, when the timing for starting torque control is shifted, a reverse blade may occur.

[0040] Therefore, in order to avoid the occurrence of such a reverse blade, 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.

[0041] This prevents the upper and lower knives from being reversed when the upper and lower knives are engaged, thereby preventing the upper and lower knives from being damaged and enabling high-quality and accurate cutting.

If the predetermined length Q is less than about 100 mm, the effect of preventing reverse blades cannot be obtained, and if the predetermined length Q is too large, the cutting effect by torque control may not be obtained. 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.

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.

1 and 2, the upper knife 4 has a vertical tooth shape and the lower knife 5 has a horizontal tooth shape. However, the present invention is not limited to this. Even if the teeth are reversed, both may be vertical teeth or horizontal teeth.

Next, based on 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.

[0044] 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, memory 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.

[0045] It is to be noted that a paper not shown for feeding the strip-shaped paper member D such as a cardboard web to the cut-off device. The feeding 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.

On the other hand, 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.

[0046] 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. Further, 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.

Note that 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.

[0048] At the time of cutting the belt-like paper member D, 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. Then, 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.

[0049] Next, 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.

Note that 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.

[0050] By doing so, a contact force is generated between the upper knife 4 and the lower knife 5 when the strip-shaped paper member D is cut. Can be kept below the limit that can be cut. The calculated cutting torque (Txa + Txb) is transmitted to the applied torque pattern generator 25.

In the given pattern generator 25, the cutting torque (Txa + Txb) necessary for cutting transmitted from the cutting torque calculator 23, the cutting start time tc transmitted from the speed pattern generator 24, and the cutting completion time to Based on the above, 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. Further, 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. By applying the cutting torques Txa and Txb from a time earlier than that, it becomes possible to reliably prevent the reverse blade at the start of cutting.

[0051] 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.

[0052] However, it is not always necessary to equalize within the range allowed by the rated capacity of the upper knife drive motor 12 and the lower knife drive motor 13! /, Either cutting torque Txa or cutting torque It is also possible to increase Txb. The meaning of the rated capacity of each torque motor in the present embodiment includes not only the allowable continuous constant output capacity but also the allowable short-time overload output capacity.

[0053] In addition, 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. . However, when the cutting speed is high, 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. As shown in Fig. 7, 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). Then, after cutting to 0.6 times cutting torque 0.6Txa (this is called medium-term low cutting torque), the latter half is again raised to about 1 time cutting torque Txa (this is called final steady 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. In FIG. 7, 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.

[0054] In the above, the initial high cutting torque is 1.1 to 1.5 times the cutting torque (1.1-Txa to 1.5'Txa), and 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.

Based on the stored application pattern, 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. In this case, 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.

Then, 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. In this case, 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.

On the other hand, 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. In this case, 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.

Note that the upper (leading) power amplifier 34 and the lower (following!) Power amplifier 37 amplify the torque command and generate an actual output current to each servo motor.

In this case, as shown in Fig. 6 (D) and Fig. 6 (E), 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.

[0059] In this way, in the speed increasing step (between tO and tl), the deceleration step (between t2 and t3), the standby step (between t3 and t4), etc., the upper knife drive motor 12 and the lower knife drive motor 13 performs synchronous operation. In the cutting process (between tc and to) or the knife joining process (between tl and t2), 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.

On the other hand, 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. In this manner, 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.

In this case, 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.

[0061] According to the above-described configuration, when the strip-shaped paper member D is cut, 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. In addition, even if the upper knife cylinder 2 or the lower knife cylinder 3 is engaged, 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.

As described above, 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. However, the present invention is not limited to the above-described embodiment, and the specific embodiments are within the scope of the present invention. It goes without saying that various changes may be made to the structural structure. For example, the above is the force that precedes the upper knife 4 and follows the lower knife 5 etc. On the contrary, the lower knife 5 is preceded by the preceding knife and the upper knife is followed! Follow-up, good as a knife.

[0063] Further, the position calculator 22, the cutting torque calculator 23, the speed pattern generator 24, the applied torque pattern generator 25, the upper knife speed control unit 30, the comparator 31, the command torque calculator 32, the command torque described above. 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).

Industrial applicability

[0064] The strip-shaped paper member such as a corrugated cardboard sheet can be accurately cut, and its usefulness is considered to be extremely high.

Claims

The scope of the claims

[1] a leading knife cylinder on which a helical leading knife is mounted;

A follow-up knife attached to a helical follow-up knife that cuts the belt-like paper member in cooperation with the preceding knife; a knife cylinder;

A leading knife drive motor for rotationally driving the leading knife cylinder;

A follow-up knife drive motor that rotationally drives the follow-up knife cylinder; and a cut-off control device that individually controls the preceding knife drive motor and the follow-up knife drive motor;

When cutting the strip-shaped paper member, the preceding knife driving motor and the follower, and a predetermined amount of applied torque in a direction in which the leading knife and the follower knife come into contact with each other by the knife drive motor are applied to the preceding knife and the follower. A method for cutting off a strip-shaped paper member, characterized in that it is applied to each knife.

[2] The value of the applied torque applied by the leading knife driving motor and the follower knife driving motor is the same.

The method for cutting off a strip-shaped paper member according to claim 1, wherein:

[3] A leading knife drive motor that rotationally drives a leading knife cylinder to which a helical leading knife is attached and a helical trailing follower, a follower after a knife is attached, a follower knife drive that rotates the knife cylinder in rotation Cut-off control device for strip-shaped paper member that controls the motor ¾ 【こ; il / 、

A speed pattern generator that generates a rotational speed pattern of the preceding knife drive motor and the follower knife drive motor based on the paper feed speed and cutting sheet length of the input belt-shaped paper member and outputs a speed command value;

A comparator that compares the speed command value from the speed pattern generator with the detected speed of the leading knife drive motor or the follower knife drive motor;

A command torque calculator for calculating rotation torque command values of the leading knife driving motor and the trailing knife driving motor based on the signal of the comparator force;

A cutting torque calculator for calculating cutting torques of the preceding knife driving motor and the follower knife driving motor; An applied torque pattern generator that distributes the cutting torque transmitted from the cutting torque calculator, generates an applied torque pattern based on a paper feed speed and a cutting sheet length of the belt-like paper member, and outputs an applied torque command value; ,

A command torque subtractor for subtracting the applied torque command value output from the applied torque butter generator force from the rotational torque command value calculated by the command torque calculator; and a result calculated by the command torque subtractor A preceding power amplifier for controlling the preceding knife drive motor based on

A command torque adder for adding the rotational torque command value calculated by the command torque calculator and the applied torque command value calculated by the applied torque pattern generator; A follow-up power amplifier for controlling the follow-up knife drive motor based on the result

A cut-off control device for a strip-shaped paper member.

[4] The cutting torque calculated by the cutting torque calculator is a cutting torque value necessary for cutting the strip-shaped paper member based on the basis weight and paper feed speed of the input strip-shaped paper member.

4. The cut-off control device for a belt-like paper member according to claim 3.

[5] The cutting torque calculated by the cutting torque calculator is piled on the cutting reaction force of the strip-shaped paper member applied to the leading knife and the trailing knife, and is applied to the leading knife and the trailing knife. The size should be such that an appropriate contact force remains.

The cut-off control device for a strip-shaped paper member according to claim 3 or 4,

[6] The applied torque pattern generated by the applied torque pattern generator is a rectangular, trapezoidal, or polygonal applied pattern.

The strip-shaped paper member cut-off control device according to any one of claims 3 to 5, wherein the force is any one of claims 3 to 5.

[7] The applied torque pattern generator changes a pattern of the applied torque according to the paper feed speed.

The belt-like paper member cut-off control device according to any one of claims 3 to 6, wherein the force is any one of claims 3 to 6.

[8] The applied torque patterns for the leading knife drive motor and the follower knife drive motor generated by the applied torque pattern generator are the same.

The belt-like paper member cut-off control device according to any one of claims 3 to 7, wherein the force is any one of claims 3 to 7.

[9] It has an input unit for inputting the basis weight of the strip paper member and the cutting sheet length, and outputs the basis weight of the strip paper member to the cutting torque calculator, so that the basis weight and cut of the strip paper member are output. 9. The power according to claim 3, wherein the power is connected to a production management device that calculates a rotational speed of the preceding knife cylinder and the follower knife cylinder based on a cut sheet length and outputs the calculated rotational speed to the speed pattern generator. A cut-off control device for a strip-shaped paper member according to item 1.

[10] a leading knife cylinder on which a helical leading knife is mounted;

A leading gear attached to one end of the rotating shaft of the preceding knife cylinder; a trailing gear attached to one end of the rotating shaft of the trailing knife cylinder and meshing with the leading gear;

A preceding drive gear meshing with the preceding gear;

The follow-up !, the follow-up mating with the gear, the drive gear,

A leading knife drive motor that rotationally drives the leading drive gear;

Rotating and driving the follower drive gear and follower with the same rated capacity as the preceding knife drive motor, knife drive motor,

A cut-off control device for individually controlling the follow-up drive gear and the leading knife drive motor.

A cut-off device for a strip-shaped paper member.

[11] At least one of the preceding gear and the follower gear is different from the other of the preceding gear and the follower gear in a section in which the preceding knife and the follower knife cooperate to cut the strip-shaped paper member. Teeth are cut out as if not touching

11. The cut-off device for a strip-shaped paper member according to claim 10.

[12] At least one of the preceding gear and the follower gear may be coupled with the other of the preceding gear and the follower gear in a section in which the preceding knife and the follower knife cooperate to cut the belt-like paper member. No matching teeth

11. The cut-off device for a strip-shaped paper member according to claim 10.

[13] At least one of the preceding gear and the follower gear is configured such that the preceding gear and the follower gear after a predetermined section has passed from the start of cutting in a section in which the preceding knife and the follower knife cooperate to cut the strip-shaped paper member. Teeth are notched so that they do not touch the other gear!

11. The cut-off device for a strip-shaped paper member according to claim 10.

[14] At least one of the preceding gear and the follower gear includes the preceding gear after a predetermined section has passed from the start of cutting in a section in which the preceding knife and the follower knife cooperate to cut the strip-shaped paper member. And there are no teeth that mesh with the other of the follower gears.

11. The cut-off device for a strip-shaped paper member according to claim 10.

[15] The preceding knife cylinder and the follower knife knife are cylindrical members made of carbon fiber reinforced plastic.

The apparatus for cutting off a strip-shaped paper member according to any one of claims 10 to 14,

[16] The cutoff control device according to any one of claims 3 to 9 is provided.

The strip-shaped paper member cut-off device according to any one of claims 10 to 15,

[17] a leading knife cylinder on which a helical leading knife is mounted;

A preceding drive gear meshing with the preceding gear; The follow-up !, the follow-up mating with the gear, the drive gear,

A leading knife drive motor that rotationally drives the leading drive gear;

The follower, a follower for rotationally driving the drive gear, and a knife drive motor;

A cut-off control device for individually controlling the follow-up drive motor and the preceding knife drive motor,

At least one of the preceding gear and the follower gear is configured such that the preceding gear and the follower 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. !, Not touching the other side of the gear!

A strip-shaped paper member cut-off device.

A leading knife cylinder to which a helical leading knife is attached;

A preceding drive gear meshing with the preceding gear;

The follow-up !, the follow-up mating with the gear, the drive gear,

A leading knife drive motor that rotationally drives the leading drive gear;

One of the preceding gear and the follower gear is connected to the preceding gear and the follower gear after a predetermined cutting start force has passed in a section in which the preceding knife and the follower knife cooperate to cut the belt-like paper member. A device for cutting off a strip-shaped paper member, characterized in that there is no tooth that meshes with the other of the gear.