Slitter device

Abstract

Provided is a slitter device with a new configuration that enables safe adjustment of the toying angle and can cut various sheet-shaped raw materials with high cut quality. 【Solution means】The extension member 313 is axially fixed to the lifting body 316 of the knife holder 300 by a bolt 312. A spur gear 313A that meshes with a spur gear 314 is formed at the tip of the extension member 313 on the side opposite to the axially fixed side. The spur gear 314 is connected to the output shaft of the stepping motor 320 and is rotationally driven by the stepping motor 320. When the spur gear 314 is rotationally driven by the stepping motor 320, the extension member 313 and the knife cartridge attached thereto swing about the axis of the bolt 312 via the spur gear 313A that meshes with it. By this swinging, the rotation surface of the upper blade knife rotates, and the toying angle can be changed.

Description

Technical Field

[0001] The present invention relates to a slitter device that cuts a sheet-shaped raw material with two rotating round blades.

Background Art

[0002] In recent years, in slitter devices, not only paper but also various types of sheet-shaped raw materials, such as metal thin films and thin-film plastics, are being cut. For example, sheet-shaped aluminum foil and copper foil used in lithium-ion batteries, electrode materials with active substances applied thereto, and very thin plastic separators provided between electrodes are being cut by slitter devices. In the case of lithium-ion batteries, if there are burrs or chips that are invisible to the human eye near the cut edges of the aluminum foil or copper foil, these burrs or chips may pierce through the separator and cause a short circuit between the electrodes, leading to a decrease in battery performance or a risk of ignition accidents. For this reason, in recent slitter devices, high quality is required for the cut edges so that the generation of burrs and chips due to cutting is suppressed as much as possible.

[0003] Fig. 1 shows the overall appearance of a currently used slitter device. A slitter device generally consists of a feeding section that feeds out a roll of sheet-shaped raw material, a cutting section that cuts the sheet-shaped raw material, and a winding section that winds up the cut sheet-shaped raw material. Depending on the slitter device, some may be provided with multiple sets of cutting sections, and there is also a known device that directly sends the sheet-shaped raw material from the manufacturing line to the cutting section for cutting and winds it up with the winding section.

[0004] Fig. 2 shows a side view of the upper blade knife 1 and the lower blade knife 3 provided above and below the cutting section of the slitter device shown in Fig. 1. The sheet-shaped raw material is conveyed from the left side to the right side in Fig. 2 and cut by the upper blade knife 1 and the lower blade knife 3. As shown in Fig. 2, the upper blade knife 1 and the lower blade knife 3 partially overlap vertically, and this overlap is called the "lap amount", which is the amount by which the knife penetrates the surface of the sheet raw material.

[0005] Figure 3(A) shows the state of viewing the upper blade knife 1 and the lower blade knife 3 from above, and Figure 3(B) shows the state of viewing the upper blade knife 1 and the lower blade knife 3 from the conveying direction of the sheet-shaped raw material. As shown in Figure 3, the upper blade knife 1 is a disc-shaped dish blade, and a blade is provided around it. The lower blade knife 3 is bowl-shaped, and a blade is provided around the entire edge in contact with the upper blade knife 1 at the top of the bowl. As shown in Figure 3(A), the upper blade knife 1 is tilted by a slight angle θ with respect to the lower blade knife 3. This angle θ is called the "toe-in angle". Note that although this angle θ is a very small angle, in Figure 3(A), the angle θ is exaggerated for clarity compared to the actual situation. At the time of cutting, with this toe-in angle θ, the upper blade knife 1 is brought into contact with the lower blade knife 3 and both are rotated. The pressure for bringing the upper blade knife 1 into contact with the lower blade knife 3 is called the "contact pressure".

[0006] At the time of cutting, with the lap amount, contact pressure, and toe-in angle adjusted to predetermined values respectively, the upper blade knife 1 and the lower blade knife 3 are rotated, the sheet raw material is fed out from the back side of Figure 1 (the direction of arrow S in Figure 3(A)), and the sheet-shaped raw material is cut by the upper blade knife 1 and the lower blade knife 3. The cut sheet-shaped raw material is wound up by a winding unit provided on the front side of Figure 1. The "lap amount", "contact pressure", and "toe-in angle" are important factors related to the quality of the cut edge of the sheet-shaped raw material cut by the slitter device.

[0007] Figure 4 shows the lower blade knife 3 and the lower blade drive motor 5 in the cutting section of the slitter device, and the knife holder 40 to which the upper blade knife 1 is attached. The knife holder 40 is mainly provided with a main shaft 10, a lifting piston section 11 for raising and lowering this main shaft 10, a lateral movement piston section 12 attached to the lower end of the main shaft 10, and an upper blade cartridge 13 that is driven laterally by this lateral movement piston section 12 and rotationally driven by an upper blade drive motor (not shown) and is attached to the upper blade drive shaft. The upper blade knife 1 is attached and held to the upper blade cartridge 13. A known contact pressure sensor 16 for detecting the contact pressure between the upper blade knife 1 and the lower blade knife 3 is provided at an intermediate portion of the main shaft 10. Further, a to-in angle setting device is provided in the knife holder 40.

[0008] A linear sensor is attached to the knife holder 40 shown in Fig. 4, and in the knife holder 40 that moves up and down by an air cylinder or the like, the position of the linear sensor attachment for grasping the amount of movement between the position of the main body and the knife mounting portion of the lower blade knife 3 is made numerically readable. The read value can be displayed on a digital display that displays the diameter of the upper blade knife 1, and the gain is adjusted so that 1 mm of the linear sensor corresponds to 2 mm of the digital display.

[0009] Precisely measure the diameter of the upper blade knife 1 in advance with a digital caliper or the like. Then, using the measured upper blade knife 1, attach it to the knife holder 40, and mechanically adjust the proper vertical position and wrap amount between the upper blade knife 1 and the lower blade knife 3 according to the experience of the operator according to the material to be cut. In this state, electrically or mechanically adjust the digital display by offset adjustment so that the value on the digital display becomes the diameter of the upper blade knife 1 measured in advance. After the above operations are completed, from the next replacement of the upper blade knife, by operating the handle of the lifting device of the knife holder 40 so that the value on the digital display becomes the same as the diameter of the upper blade knife, the operator can set the wrap amount without directly visually recognizing the wrap amount.

[0010] The toein angle setting device consists of a turning mechanism 30 incorporated between the main shaft 10 where the contact pressure sensor 16 is provided in the knife holder 40 and the cross-feed piston section 12. The turning mechanism 30 includes a turning drive motor 31, a speed reducer 32, and spur gears 33. The turning drive motor 31 rotates the spur gears 33 via the speed reducer 32. The cross-feed piston section 12, the upper blade cartridge 13, and the upper blade knife 1 are also referred to as the turning section, and the part of the turning section that engages with the spur gears 33 has been spur-gear machined. Thus, by rotating the spur gears 33, the cross-feed piston section 12 turns around the main shaft 10. With such a configuration, the relationship between the rotation angle of the turning drive motor 31 and the toein angle, that is, how much the toein angle changes when the turning drive motor 31 is rotated, is investigated in advance, and the result is acquired as data.

[0011] In the cutting section shown in FIG. 4, the upper blade knife 1 and the lower blade knife 3 are adjusted and fixed by adjusting the cross-feed piston section so that a slight contact pressure is applied while looking at the contact pressure value displayed on a contact pressure gauge (not shown). Next, when the turning drive motor 31 is turned left and right to find the point where the contact pressure value becomes minimum, that becomes the zero point of the toein angle. And to set the toein angle to a desired angle, the turning drive motor 31 is rotated by an angle corresponding to that toein angle based on the relationship investigated in advance.

[0012] However, in the toein angle setting device shown in FIG. 4, since spur gears 33 are used, the problem of backlash due to the gap between the gears cannot be avoided, and if there is backlash, the setting error of the toein angle becomes large. Also, when cutting new materials such as thin metal films and thin-film plastics, cutting with a narrow width may be required, so in recent slitter devices, miniaturization of the knife holder is required as well as the quality of the cut edge.

Summary of the Invention

Problems to be Solved by the Invention

[0013] On one side, the present invention solves various problems in conventional to-in angle setting devices, reduces the workload of the operator adjusting the to-in angle, enables the operator to safely adjust the to-in angle, can cut various sheet-shaped raw materials with higher cut quality compared to conventional devices, and provides a slitter device having a configuration that can adjust the to-in angle without stopping the device during operation of the device.

Means for Solving the Problems

[0014] 〔1〕The slitter device according to an embodiment of the present invention is a slitter device that brings a disk-shaped upper blade knife and a lower blade knife into contact with each other, supplies a sheet-shaped raw material between the upper blade knife and the lower blade knife, and cuts the sheet-shaped raw material, an upper blade knife mounting portion for mounting the upper blade knife, an upper blade knife lifting and lowering portion for lifting and lowering the upper blade knife mounting portion, an extension member in which the upper blade knife mounting portion is fixed and axially fixed to the upper blade knife lifting and lowering portion so that the rotation surface of the mounted upper blade knife rotates, and an end gear is formed at an end portion on the side opposite to the upper blade knife mounting portion, a gear member that meshes with the end gear of the extension member, a driving means for driving the gear member, and is a slitter device that drives the gear member by the driving means to swing the extension member and adjust the to-in angle of the upper blade knife.

[0015] 〔2〕In one embodiment of the present invention, the driving means is a stepping motor or a motor capable of knowing the rotational speed, and is the slitter device according to 〔1〕.

[0016] 〔3〕The slitter device according to an embodiment of the present invention is a slitter device that brings a disk-shaped upper blade knife and a lower blade knife into contact with each other, supplies a sheet-shaped raw material between the upper blade knife and the lower blade knife, and cuts the sheet-shaped raw material, an upper blade knife mounting portion for mounting the upper blade knife, An upper blade knife mounting portion is attached, and an upper blade knife lifting portion that is capable of raising and lowering the attached upper blade knife mounting portion and rotating around the vertical axis of the apparatus main body, and A screw plate provided in the upper blade knife lifting portion, having a first screw, a first gear driven by a driving means, a second gear provided with a second screw, and a rotation transmission means for transmitting the rotation of the first gear to the second gear, Driving means for driving the first gear, is provided, By the driving means driving the first gear, the rotation of the first gear and the second gear causes one of the first screw and the second screw to be pushed out in a direction perpendicular to the screw plate and the other to be pulled out in a direction perpendicular to the screw plate, thereby rotating the upper blade knife lifting portion around the apparatus main body to adjust the toein angle of the upper blade knife. It is a slitter device.

[0017] 〔4〕In one embodiment of the present invention, The driving means is the slitter device according to 〔3〕, which is a stepping motor or a motor capable of knowing the rotation speed.

[0018] 〔5〕In one embodiment of the present invention, The rotation transmission means is the slitter device according to 〔3〕, which is an odd number or an even number of auxiliary gears provided between the first gear and the second gear.

[0019] 〔6〕In one embodiment of the present invention, The rotation transmission means is the slitter device according to 〔3〕, which is a first and a second worm gear formed on a single shaft, the first worm gear meshing with the first gear, and the second worm gear meshing with the second gear to transmit the rotation of the first gear to the second gear.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0021] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0022] As described above, in recent years, the sheet-shaped raw materials to be cut have diversified, and the requirements for the quality of the cut edges have increased. Therefore, various conditions such as the wrapping amount often need to be adjusted to obtain high-quality cut edges according to the type of raw material. In the conventional knife holder shown in FIG. 4, when it is desired to change the wrapping amount, the wrapping amount has to be readjusted manually accordingly. Also, when it is desired to change the offset amount between the upper knife and the lower knife (the displacement of the positions of the upper knife and the lower knife along the conveying direction of the sheet-shaped raw material), the operator has to readjust it.

[0023] FIG. 5 is a view of the knife holder in the slitter device according to an embodiment of the present invention, (A) viewed from a direction perpendicular to the conveying direction of the sheet (the direction of the arrow in FIG. 5(A)), (B) viewed from the front in the conveying direction, and (C) a view of the state where the screw plate is removed from the knife holder in (A). FIG. 6 is a block diagram of the control computer incorporated in the main body of the knife holder of FIG. 5. The control computer of FIG. 6 includes a CPU 150, a memory 151, a touch panel 152, a display monitor 153, and an A / D converter 154 for controlling the operation of the knife holder. The output signal of the A / D converter 154 is supplied to a linear sensor 155.

[0024] Values such as the diameter of the upper knife 1, the target offset amount, and the wrapping amount between the upper knife 1 and the lower knife 3 are pre-input into the memory 151, and these values can be rewritten at any time as needed. Then, the CPU 150 receives information about the position of the knife holder from the linear sensor 155, and based on a pre-prepared program, controls the lifting air cylinder to operate and move the knife holder to a predetermined position. In one example, the predetermined position is the position stored in the memory 151 in advance as the origin of the knife holder. The input of values such as the wrapping amount can be performed via the touch panel 152, and the information about the position of the knife holder from the linear sensor 155 can be displayed on the display monitor 153.

[0025] If the operator performs the necessary operations on the touch panel 152 while checking the numerical values displayed on the display monitor 153, the vertical positional relationship between the upper blade knife 1 and the lower blade knife 3 can be set to a desired positional relationship without visually checking it in a narrow space, so there is no need for the operator to manually adjust the wrapping amount or the like.

[0026] Next, the adjustment of the toe-in angle by the screw plate 160 shown in FIG. 5 will be described. FIG. 7 shows a top view (upper side) and a front view (lower side) of the screw plate 160 removed from the knife holder of FIG. 5. The screw plate 160 is provided with a stepping motor 161, a spur gear 162 attached to the shaft of the stepping motor 161 and directly driven by the stepping motor 161, a spur gear 163A meshing with the spur gear 162, an auxiliary gear 164A meshing with the spur gear 163A, an auxiliary gear 164B meshing with the auxiliary gear 164A, and a spur gear 163B meshing with the auxiliary gear 164B. Further, a screw 165A is integrally attached to the shaft of the spur gear 163A, and a screw 165B is integrally attached to the shaft of the spur gear 163B. In this embodiment, both the screw 165A and the screw 165B are right-handed screws, but they may both be left-handed screws.

[0027] Referring to FIG. 5(C), the swivel part 170 indicated by hatching is pivotally attached to the lower part of the piston lifting part 172 indicated by dotted lines by a rotating shaft 171. Two screw plate attachment parts 170A and 170B are provided on the swivel part 170, and the screw plate 160 is fixed here. The screws 165A and 165B of the screw plate 160 are respectively capable of abutting against two push-pull points 171A and 171B provided on the piston lifting part 172.

[0028] Since the spur gear 162, spur gears 163A and 163B, auxiliary gears 164A and 164B are meshed as described above, when the spur gear 162 is driven by the motor, each gear also rotates. At this time, due to the provision of two auxiliary gears 164A and 164B in between, the spur gears 163A and 163B rotate in opposite directions. For this reason, when the motor rotates counterclockwise, the screw 165A moves in the direction of pushing the push-pull point 171A of the piston lifting part 172, and the screw 165B moves in the direction of pulling the push-pull point 171B of the piston lifting part 172 conversely. On the other hand, when the motor rotates clockwise, the screw 165B moves in the direction of pushing the push-pull point 171B of the piston lifting part 172, and the screw 165A moves in the direction of pulling the push-pull point 171A of the piston lifting part 172 conversely.

[0029] The screws 165A and 165B engage the auxiliary gears 164A and 164B in a pre-compressed state. By doing so, backlash can be reduced without incorporating a special backlash reduction mechanism. Also, if a fine-pitch screw is used for thrust generation, the reduction ratio can be increased, and even if there is backlash between the spur gear 162 and the spur gear 163A, its influence can be minimized. By examining in advance the relationship between the rotation amount of the motor and the change amount of the toein angle, the operator can remotely adjust the toein angle without actually touching the knife holder. Thereby, the risk that the operator has to approach the slitter device when the power is on can be reduced. Also, since the adjustment of the toein angle becomes easy, various sheet-like raw materials can be cut with high cut quality. In one example, the memory 151 stores in advance data regarding the relationship between the rotation amount of the motor and the change amount of the toein angle, and the CPU 150 can refer to the data and control the motor so that the rotation amount of the motor corresponds to the input of the toein angle from the operator or the like, whereby the operator can adjust the toein angle without actually touching the knife holder.

[0030] In the embodiment shown in FIG. 7, two auxiliary gears 164A and 164B are provided, and it is assumed that the screws 165A and 165B rotate in the same direction. However, if only one auxiliary gear is provided and the two screws are rotated in opposite directions, one screw can move in the direction of pushing the swivel part and the other screw can move in the opposite pulling direction, similar to the embodiment shown in FIG. 7. Generally, when an even number of auxiliary gears are provided, the spur gears 163A and 163B rotate in opposite directions, and when an odd number of auxiliary gears are provided, the spur gears 163A and 163B rotate in the same direction. The rotation directions of the spur gears 163A and 163B and the rotation directions of the screws can be selected according to the actual situation of each slitter device.

[0031] FIG. 8 shows a modified example of the screw plate shown in FIG. 7. The upper part of FIG. 8 is a view seen from above, and the lower part of FIG. 8 is a view seen from the front. In the screw plate 260 of FIG. 8, instead of the spur gears 162 and the auxiliary gears 164A and 164B in FIG. 7, a shaft 262 is provided in parallel with the screw plate 260. On the shaft 262, worm gears 264A and 264B that mesh with the respective worm wheels 263A and 263B are provided. The worm gears 264A and 264B are in opposite directions to each other.

[0032] The shaft 262 is rotationally driven by the output shaft of the motor 261 via the gear 266. The motor 261 is preferably a motor with a rotation amount sensor that can detect the magnetic field generated by a magnet attached to the rotation shaft using a Hall element to determine the rotation speed. When the motor 261 rotates, since the worm gears 264A and 264 rotate in opposite directions, the screw 265A attached to the worm wheel 263A and the screw 265B attached to the worm wheel 263B rotate in opposite directions. By making the screws 265A and 265B either the same right-handed screw or left-handed screw, the rotation in the opposite directions of the screws 265A and 265B will push the swivel part with one and pull the swivel part with the other, enabling the swivel of the swivel part. Alternatively, even if the worm gears 264A and 264 are set to rotate in the same direction and one of the screws 265A and 265B is a right-handed screw and the other is a left-handed screw, the swivel of the swivel part can be similarly achieved.

[0033] Regarding the pressure application adjustment in the embodiment of FIG. 8, the pressure application adjustment can be achieved by loosening the screw for fixing the worm gear, adjusting the position in the direction of applying the pressure, and then fixing the screw.

[0034] FIG. 9 shows a knife holder 300 having a toying angle adjustment mechanism according to still another embodiment of the present invention. The left side of FIG. 9 is a view seen from the side, and the right side of FIG. 9 is a view seen from below (i.e., from the lower blade knife side) looking up. When actually attaching the knife holder 300 to the slitter device, it is attached in a state where the left side view of FIG. 9 is rotated 90 degrees to the right so that the upper blade knife 311 protruding from the knife cover 310 faces downward.

[0035] In the knife holder 300 of FIG. 9, an extension member 313 axially fixed to the lifting body 316 (an example of the "upper blade knife lifting part" in the claims) of the knife holder 300 by a bolt 312 is provided. The extension member 313 extends downward (tip side) in the left-side view of FIG. 9, and a helical gear 313A is formed at the tip portion opposite to the axially fixed side. This helical gear 313A meshes with a helical gear 314, and the helical gear 314 is connected to the output shaft of the stepping motor 320 and is rotationally driven by the stepping motor 320. Near the bolt 312 of the extension member 313, on the right side in the left-side view of FIG. 9, a knife cartridge (an example of the "upper blade knife mounting part" in the claims) including a pressure sensor 315, a knife cover 310, and an upper blade knife 311 is attached.

[0036] The extension member 313 is axially fixed to the knife holder 300 by the bolt 312, but is not completely fixed. Therefore, when the helical gear 314 is rotationally driven by the stepping motor 320, the extension member 313 and the knife cartridge attached thereto swing in a direction perpendicular to the plane of the left-side view of FIG. 9 (the left-right direction in the right-side view of FIG. 9) about the axis of the bolt 312 through the meshing helical gear 313A. By this swinging, the rotation surface of the upper blade knife rotates, and the toe-in angle of the upper blade knife 311 with respect to the lower blade knife (not shown) can be changed. Therefore, by examining in advance the rotation amount of the stepping motor 320 and the change amount of the toe-in angle, the operator can remotely adjust the toe-in angle without actually touching the toe-in angle adjustment mechanism. Thereby, the risk of the operator approaching the slitter device when the power is on can be reduced. In one example, the memory 151 stores in advance data regarding the relationship between the rotation amount of the motor and the change amount of the toe-in angle, and the CPU 150 can refer to the data and control the motor so that the rotation amount of the motor corresponds to the input of the toe-in angle from the operator or the like. Thereby, the operator can adjust the toe-in angle without approaching the slitter device.

[0037] In each slitter device according to the embodiment of the present invention described above, based on the result of examining in advance the rotation amount of the motor and the change amount of the to-in angle, the to-in angle can be adjusted to an appropriate value, so that the quality of the cut edge of the sheet-shaped raw material can be kept constant at a high level compared with the conventional device, the generation of burrs and cut chips can be suppressed, and not only paper but also metal thin films and thin film plastics, etc., which particularly require high cut edge quality, can be cut.

[0038] As described above, the present invention has been described based on the embodiments of the invention. However, the technical scope of the present invention is not limited to the embodiments disclosed herein, and various modifications are possible within the scope of the gist thereof, and these are also included in the technical scope of the present invention.

Explanation of reference numerals

[0039] 1,311: Upper blade knife 3: Lower blade knife 40: Knife holder 160,206: Screw holder 161: Stepping motor 163A,163B,263A,263B: Spur gear 164A,164B: Auxiliary gear 165A,165B,265A,265B: Screw 264A,264B: Worm gear 312: Bolt 313: Extension member 313A: Helical gear 314: Spur gear 320: Stepping motor

Claims

1. A slitter device that cuts a sheet-like raw material by contacting a disk-shaped upper blade knife and a disk-shaped lower blade knife and supplying the sheet-like raw material between the upper blade knife and the lower blade knife, an upper blade knife mounting portion for mounting an upper blade knife; an upper blade knife lifting unit that lifts and lowers the upper blade knife mounting unit; an extension member to which the upper blade knife mounting portion is fixed and which is pivotally attached to the upper blade knife lifting portion so that the rotation surface of the mounted upper blade knife rotates, and which has an end gear formed on an end portion opposite to the upper blade knife mounting portion; a gear member meshing with the end gear of the extension member; A drive means for driving the gear member; Equipped with A slitter device in which a driving means drives a gear member to swing an extension member and adjusts the toe-in angle of an upper blade knife.

2. 2. The slitter apparatus according to claim 1, wherein the driving means is a stepping motor or a motor whose number of revolutions is known.

3. A slitter device that cuts a sheet-like raw material by contacting a disk-shaped upper blade knife and a disk-shaped lower blade knife and supplying the sheet-like raw material between the upper blade knife and the lower blade knife, an upper blade knife mounting portion for mounting an upper blade knife; an upper blade knife lifting unit to which the upper blade knife mounting unit is attached, which lifts and lowers the attached upper blade knife mounting unit and is rotatable around a vertical axis of the device body; a screw plate provided in the upper blade knife lifting section, the screw plate having a first gear provided with a first screw and driven by a drive means, a second gear provided with a second screw, and a rotation transmission means for transmitting the rotation of the first gear to the second gear; A drive means for driving the first gear; Equipped with The driving means drives the first gear, and the rotation of the first gear and the second gear causes one of the first screw and the second screw to be pushed out in a direction perpendicular to the screw plate, and the other screw to be pulled out in a direction perpendicular to the screw plate, thereby rotating the upper blade knife lifting part around the device body and adjusting the toe-in angle of the upper blade knife.

4. 4. The slitter apparatus according to claim 3, wherein the driving means is a stepping motor or a motor whose number of revolutions is known.

5. 4. The slitter apparatus according to claim 3, wherein the rotation transmission means is an odd or even number of auxiliary gears provided between the first gear and the second gear.

6. 4. The slitter apparatus according to claim 3, wherein the rotation transmission means is a first and a second worm gear formed on a single shaft, the first worm gear meshing with the first gear and the second worm gear meshing with the second gear to transmit the rotation of the first gear to the second gear.

Images