Slitting device

Abstract

Provided is a slitting device that can improve cutting quality when cutting a long medium.　The present invention comprises: a backup roller 730 that supports a long sheet; and an upper blade knife and a lower blade knife that cut the sheet supported by the backup roller 730, along the conveyance direction of the sheet. The backup roller 703 has protrusions 733 that apply tension in the width direction that intersects the conveyance direction of the sheet.

Description

Slitter device

[0001] The present invention relates to a slitter device.

[0002] Conventionally, slitter devices for cutting various types of long media such as not only paper but also thin metal films and thin-film plastics are known (see, for example, Patent Document 1).

[0003] Japanese Patent Application Laid-Open No. 2024-4809

[0004] By the way, in the conventional technology, when cutting a long medium, if the material of the medium is non-uniform, there is a problem that the medium floats up in the thickness direction and the cutting quality deteriorates.

[0005] The present invention has been made in view of such circumstances, and its object is to provide a slitter device capable of improving the cutting quality when cutting a long medium.

[0006] The slitter device that solves the above problems includes a support portion that supports a long medium, and a cutting portion that cuts the medium supported by the support portion along the conveyance direction of the medium. The support portion has a tension applying portion that applies tension in the width direction intersecting the conveyance direction of the medium.

[0007] According to the present invention, the cutting quality when cutting a long medium can be improved.

[0008] It is a schematic diagram showing the schematic configuration of an embodiment of a slitter device. It is a schematic diagram of a slitter. It is a schematic diagram of a slitter. It is a schematic diagram of a backup roller. It is a cross-sectional view of a backup roller. It is an enlarged view of a main part of a backup roller. It is a block diagram showing the control configuration of a slitter device. It is a diagram for explaining the operation of a slitter device.

[0009] Hereinafter, an embodiment of the slitter device will be described with reference to the drawings.

[0010] As shown in FIG. 1, the slitter device 100 includes, for example, a lead-in roll 500, a main feed roll 600, a slitter 700, a sub-feed roll 800, a rotary knife 900, and a conveyor portion 1000.

[0011] The lead-in roll 500 has rollers 501 and 502 and guides the movement of a sheet 400, which is an example of a medium supplied from the unreel stand. Any number of rollers or the like that may be provided between the unreel stand and the lead-in roll 500 to guide the movement of the sheet 400.

[0012] The main feed roll 600 is positioned downstream of the lead-in roll 500 in the conveying direction of the sheet 400. The main feed roll 600 has an upper roller 601 and a lower roller 602, which apply conveying force to the sheet 400. The outer surface of the upper roller 601 is in contact with the outer surface of the lower roller 602. The lower roller 602 rotates based on the driving force output from the servo motor SM1. As the lower roller 602 rotates, the upper roller 601 also rotates in sync, and by sandwiching the sheet 400 between the outer surface of the upper roller 601 and the outer surface of the lower roller 602, conveying force is applied to the sheet 400. The main feed roll 600 controls the rotation speed and torque of the servo motor SM1, applying tension to the sheet 400 from the unreel stand to the main feed roll 600, thereby suppressing deflection of the sheet 400.

[0013] The slitter 700 is positioned downstream of the main feed roll 600 in the conveying direction of the sheet 400. The slitter 700 has an upper blade knife 701 and a lower blade knife 702, and continuously cuts the sheet 400 so that the width of the sheet 400 becomes a predetermined width. The upper blade knife 701 and the lower blade knife 702 are examples of the cutting parts. The slitter 700 is not limited to the configuration shown in Figure 1, which consists of an upper disc-shaped blade and a lower bowl-shaped blade, but any configuration can be adopted.

[0014] The sub-feed roll 800 is positioned downstream of the slitter 700 in the conveying direction of the sheet 400. The sub-feed roll 800 has an upper roller 801 and a lower roller 802, and applies conveying force to the sheet 400. The outer circumferential surface of the upper roller 801 is in contact with the outer circumferential surface of the lower roller 802. The lower roller 802 rotates based on the driving force output from the servo motor SM2. As the lower roller 802 rotates, the upper roller 801 also rotates in sync, and by sandwiching the sheet 400 between the outer circumferential surface of the upper roller 801 and the outer circumferential surface of the lower roller 802, conveying force is applied to the sheet 400. The sub-feed roll 800 may also have a configuration that includes only the lower roller 802 without the upper roller 801. In this case, the sub-feed roll 800 applies conveying force to the sheet 400 by bringing the sheet 400 into contact with the outer circumferential surface of the lower roller 802. The sub-feed roll 800 controls the rotational speed and torque of the servo motor SM2, and by applying tension to the sheet 400 between the sub-feed roll and the main feed roll 600, that is, tension to the sheet 400 that is cut (slit) by the slitter 700, it suppresses the bending of the sheet 400.

[0015] The rotary knife 900 is positioned downstream of the subfeed roll 800 in the conveying direction of the sheet 400. The rotary knife 900 has an upper drum 901 and a lower drum 902, and blades 901a and 902a are formed on the outer circumferential surfaces of the upper drum 901 and the lower drum 902, respectively. These blades 901a and 902a press against the sheet 400 at regular time intervals, thereby cutting the sheet 400 to a predetermined length.

[0016] The conveyor section 1000 is positioned downstream of the rotary knife 900 in the direction of sheet 400 transport. The conveyor section 1000 transports the sheets 400 cut by the rotary knife 900 and stores them in the Rayboy 1010.

[0017] As shown in Figure 2, the slitter 700 has a backup roller 730 that holds the lower blade knife 702. A sheet 400 is wound around the backup roller 730. In this respect, the backup roller 730 is an example of a support part that supports the sheet 400 as an example of a medium. The backup roller 730 is configured to be rotatable about a shaft portion 731, and the lower blade knife 702 is held at multiple positions in the axial direction of the backup roller 730. In this embodiment, the lower blade knife 702 is held at three positions in the axial direction of the backup roller 730. The three lower blade knives 702 are located at the central position in the axial direction of the backup roller 730 and at both ends in the axial direction of the backup roller 730, respectively. Note that the number of lower blade knives 702 is not limited to three, but may be any number. The outer circumferential surface of the lower blade knife 702 is configured to be flush with the outer circumferential surface of the backup roller 730. Multiple upper blade knives 701 are positioned at various locations corresponding to the lower blade knife 702 in the axial direction of the backup roller 730. The upper blade knife 701 is configured to be movable in a height direction intersecting the axial direction of the backup roller 730 by a lifting piston 712, and is configured to be movable in a horizontal direction along the axial direction of the backup roller 730 by a lateral piston 713.

[0018] A pair of pressing units 750 are positioned at both ends of the backup roller 730 in the axial direction. The pair of pressing units 750 is an example of a pressing section. The pair of pressing units 750 are positioned outside the three lower blade knives 720 in the axial direction of the backup roller 730. The pair of pressing units 750 includes a pressing roller 751, a roller holder 752 that rotatably holds the pressing roller 751, a lifting piston section 754 connected to the roller holder 752 via a shaft section 753, and a swivel section 755 that rotatably connects the roller holder 752 and the lifting piston section 754 about the shaft section 753. The slitter device 100 of this embodiment can have a toe-in angle with respect to the axial direction of the backup roller 730 by having the swivel section 755.

[0019] As shown in Figure 3, the slitter 700 has a knife holder 740 that holds the upper blade knife 701. The knife holder 740 has a spindle 711, a lifting piston 712 that raises and lowers the spindle 711, a lateral piston 713 attached to the lower end of the spindle 711, and an upper blade cartridge 714 that is driven laterally by the lateral piston 713. An upper blade drive shaft, which is rotationally driven by an upper blade drive motor (not shown), is mounted on the upper blade cartridge 714. The upper blade knife 701 is mounted on and held in relation to the upper blade cartridge 714. A pressure sensor 715 is provided in the middle of the spindle 711 to detect the contact pressure between the upper blade knife 1 and the lower blade knife 3. A swivel mechanism 716 is provided between the spindle 711 and the lateral piston 12. The swivel mechanism 716 includes a swivel motor 717, a reduction gear 718, and a spur gear 719. The swivel mechanism 716 rotates the spur gear 719 via the reduction gear 718 using the swivel motor 717, thereby swiveling the lateral piston section 713 around the main shaft 711. The operator then drives the lateral piston section 713 to swivel left and right using the swivel mechanism 716, and sets the point where the contact pressure detected by the pressure sensor 715 is minimized as the zero point of the toe-in angle of the slitter 700.

[0020] As shown in Figures 4 and 5, the backup roller 730 has a shaft portion 731 and a roller portion 732 rotatably connected to the shaft portion 731. The roller portion 732 is made of a cylindrical elastic material and is divided into multiple (four in this embodiment) sections in the axial direction of the backup roller 730. The roller portion 732 is divided at positions corresponding to each of the three upper blade knives 701 in the axial direction of the backup roller 730. At the positions where the roller portion 732 is divided, the outer circumferential surface of the shaft portion 731 of the backup roller 730 is exposed. On both sides of the roller portion 732 in the axial direction of the backup roller 730, there are protrusions 733 that apply tension to the sheet 400 wrapped around the backup roller 730 toward the axial side of the backup roller 730. The protrusions 733 project outward in the radial direction of the backup roller 730 from the outer circumferential surface of the roller portion 732. The protrusion 733 projects diagonally outward in the axial direction of the backup roller 730 from the outer circumferential surface of the roller portion 732. The protrusion 733 is positioned further outward in the axial direction of the backup roller 730 than the positions of the three upper blade knives 701 described above (shown as reference lines S1, S2, and S3 in Figure 5).

[0021] Then, as shown in Figure 6, when the sheet 400 is supported by the backup roller 730, each of the multiple protrusions 733 is pressed by the sheet 400 and elastically deforms so as to tilt outward in the axial direction of the backup roller 730. As a result, the contact point P1 between the sheet 400 and the protrusions 733 moves outward in the axial direction of the backup roller 730. This applies tension from the backup roller 730 to the sheet 400 in the axial direction of the backup roller 730.

[0022] Next, the control configuration of the slitter device 100 of this embodiment will be described with reference to the drawings.

[0023] As shown in Figure 7, the slittering device 100 includes a CPU 150, memory 151, touch panel 152, display monitor 153, and A / D converter 154 as a control configuration for controlling the operation of the slitter 700, and the output signal of the A / D converter 154 is supplied to the CPU 150.

[0024] The memory 151 is pre-loaded with values ​​such as the diameter of the upper blade knife 701, the target offset amount, and the overlap amount between the upper blade knife 701 and the lower blade knife 702. These values ​​can be rewritten as needed. The CPU 150 receives information about the position of the knife holder 740 from the linear sensor 155 and controls the lifting piston 712 to move the knife holder 740 to a predetermined position based on a pre-prepared program. In one example, the predetermined position is the position pre-stored in the memory 151 as the origin of the knife holder 740. Values ​​such as the overlap amount can be entered via the touch panel 152, and information regarding the position of the knife holder from the linear sensor 155 can be displayed on the display monitor 153. Furthermore, by performing the necessary operations on the touch panel 152 while checking the values ​​displayed on the display monitor 153, the operator can set the upper blade knife 701 and the lower blade knife 702 to the desired positional relationship without having to visually check their relative positions in a confined space. Therefore, the operator does not need to manually adjust the amount of wrap, etc.

[0025] Next, the operation of the slitter device 100 of this embodiment will be described.

[0026] As shown in Figure 8, in the process of transporting the sheet 400 between the upper blade knife 701 and the backup roller 730, the slitter device 100 of this embodiment cuts the sheet 400 at multiple locations in the width direction of the sheet 400 along the transport direction using the upper blade knife 701 and the lower blade knife 702.

[0027] Here, tension is applied to both sides of the sheet 400 in the width direction by a plurality of protrusions 733 provided at both ends in the axial direction of the backup roller 730. As a result, when cutting the sheet 400, the sheet 400 does not lift up from the backup roller 730, and the quality of the cutting of the sheet 400 is improved.

[0028] In particular, in this embodiment, both sides of the sheet 400 in the width direction are pressed against the backup roller 730 by the pressing unit 750. As the pressing of the sheet 400 by the pressing unit 750 promotes the elastic deformation of the protrusion 733, tension is accurately applied to both sides of the sheet 400 in the width direction. Therefore, when cutting the sheet 400, the lifting of the sheet 400 from the backup roller 730 is effectively suppressed, and the quality of cutting the sheet 400 is further improved.

[0029] As described above, according to this embodiment, the following effects can be obtained.

[0030] (1) The backup roller 730 has a protrusion 733 that applies tension in the width direction of the sheet 400. Therefore, when cutting the sheet 400, the lifting of the sheet 400 from the backup roller 730 is suppressed, and the quality of cutting the sheet 400 can be improved.

[0031] (2) The protrusions 733 protrude diagonally outward in the width direction of the sheet 400. Therefore, a configuration can be realized in which tension is applied outward in the width direction of the sheet 400 as the protrusions 733 undergo elastic deformation.

[0032] (3) The protrusions 733 are made of an elastic material. Therefore, the elastic deformation of the protrusions 733 is promoted, and tension can be suitably applied to the sheet 400 toward the outside in the width direction.

[0033] (4) The protrusions 733 are arranged at multiple positions spaced apart in the width direction of the sheet 400. Therefore, tension can be applied over a wide area in the width direction of the sheet 400.

[0034] (5) The upper blade knife 701 and the lower blade knife 702 are positioned to correspond to the central portion of the sheet 400 in the width direction, and the protrusion 733 is positioned on the outside of the sheet 400 in the width direction on the backup roller 730. Therefore, tension can be applied to both sides of the sheet 400 in the width direction while suitably cutting the central portion of the sheet 400 in the width direction.

[0035] (6) The system includes a pressing unit 750 positioned at a location corresponding to the outer portion of the sheet 400 in the width direction, which presses the sheet 400 supported by the backup roller 730. As a result, the pressing of the sheet 400 by the pressing unit 750 promotes the elastic deformation of the convex portion 733, and tension is accurately applied to both sides of the sheet 400 in the width direction. Therefore, when cutting the sheet 400, the lifting of the sheet 400 from the backup roller 730 is effectively suppressed, and the quality of cutting the sheet 400 can be further improved.

[0036] The above embodiment may be modified into the following form.

[0037] In the above embodiment, the pressing unit 750 may be positioned in a location corresponding to the inner portion in the width direction of the sheet 400, or the pressing unit 750 may be omitted.

[0038] In the above embodiment, the upper blade knife 701 and the lower blade knife 702 may be positioned in locations corresponding to the outer portion of the sheet 400 in the width direction.

[0039] In the above embodiment, the protrusion 733 may be positioned on the inside of the sheet 400 in the width direction on the backup roller 730, or it may be positioned over the entire width direction of the sheet 400 on the backup roller 730.

[0040] In the above embodiment, the backup roller 730 only needs to have at least the protrusion 733 made of an elastic material; for example, both the protrusion 733 and the roller portion 732 may be made of an elastic material.

[0041] In the above embodiment, the tension-applying portion does not necessarily have to be a convex portion 733 that protrudes diagonally outward in the width direction of the sheet 400; any shape can be adopted as long as it can apply tension outward in the width direction of the sheet 400.

[0042] It should be noted that the individual embodiments of the present invention are not independent but can be combined and implemented as appropriate. Furthermore, the embodiments described above are illustrative examples for explaining the present invention, and the present invention is not limited to these embodiments. The present invention can be implemented in various forms without departing from its spirit.

[0043] 100...Slitter device, 400...Sheet as an example of a medium, 701...Upper blade knife as an example of a cutting part, 702...Lower blade knife as an example of a cutting part, 730...Backup roller as an example of a support part, 733...Convex part as an example of a tensioning part, 750...Pressing unit as an example of a pressing part.

Claims

1. A slitter device comprising: a support section for supporting a long medium; and a cutting section for cutting the medium supported by the support section along the medium's transport direction, wherein the support section has a tension-applying section for applying tension in the width direction intersecting the medium's transport direction.

2. The slitter apparatus according to claim 1, wherein the tension-applying portion is a convex portion that protrudes diagonally outward in the width direction of the medium.

3. The slitter apparatus according to claim 2, wherein the protrusion is made of an elastic material.

4. The slitter apparatus according to claim 2, wherein the protrusions are arranged at multiple positions spaced apart in the width direction of the medium.

5. The slitter apparatus according to claim 1, wherein the cutting portion is positioned at a location corresponding to the central portion in the width direction of the medium, and the tensioning portion is positioned on the outside of the support portion in the width direction of the medium.

6. The slitter apparatus according to claim 1, further comprising a pressing portion positioned at a location corresponding to the outer portion in the width direction of the medium, for pressing the medium supported by the support portion.

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