JP2012086320A - Sheet cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly cope with a change in the thickness of a web to be cut or a change in the length of a sheet.
In a rotary cutter 3 in which a rotary blade unit 1 and a fixed blade unit 2 are combined together, the blade interval, which is the interval between the rotary blade 4 and the fixed blade 7, can be easily adjusted, and the blade interval. The angle of the rotary cutter 3 with respect to the traveling direction of the web 20 can be adjusted while maintaining the above, and the fixed blade holder 8 to which the fixed blade 7 is attached is supported by the fixed blade support 9. The fixed blade support 9 and the rotary blade holder 5 are integrally attached to the base frame 16 via the angle adjusting means 14. The position of the fixed blade holder 8 with respect to the fixed blade support 9 can be easily adjusted by the second position adjusting means 12. The angle adjusting means 14 and the second position adjusting means are independent and are not affected by each other.
[Selection] Figure 2

Description

  The present invention relates to a sheet cutting apparatus for cutting a long web wound in a roll shape into a predetermined length and processing the sheet into a sheet, and in particular, a sheet in which the thickness of the web and the length of the sheet can be freely set. The present invention relates to a cutting device.

In the printing industry and the paper processing industry, a sheet cutting apparatus that cuts a web wound in a roll shape into sheets (sheets) is used.
A function required of the sheet cutting apparatus is to cut a web sent at a high speed into a sheet having a predetermined length.

  The basic configuration of a conventional sheet cutting apparatus is described in Patent Document 1. The sheet cutting device is composed of three parts: a web supply unit, a cutting unit, and a stacking unit. The web is supplied to the cutting unit by the web supply unit, cut into sheets by the cutting unit, and the sheets are stacked on the stacking unit. The web supply unit has a role of pulling the web from the roll at a predetermined speed and supplying it to the cutting unit. The cutting unit cuts the web at a right angle with a rotary cutter. The stacking unit picks up the sheets cut by the cutting unit and stacks the sheets so as not to be displaced.

  The rotary cutter that constitutes the cutting portion is a combination of a rotary blade unit and a fixed blade unit. In the rotary blade unit, a rotary blade having a blade longer than the width of the web along the longitudinal direction of the cylinder is attached to the outer periphery of the rotating cylinder. The fixed blade unit includes a fixed blade fixed to the frame side of the sheet cutting device along the rotary blade unit. The cutting edge of the fixed blade and the cutting edge of the rotating blade are positioned so that a very small distance (several micrometers) is opened at the cutting point. If there is a web at the cutting point of the rotating blade and the fixed blade, the web is cut at the position of the cutting point. The blade interval, which is the distance at the cutting point between the rotating blade and the fixed blade, is determined by the thickness of the web to be cut.

  The running speed of the web is controlled to a predetermined speed by the web supply unit. The rotational speed of the rotary blade is controlled in relation to the running speed of the web. The length of the sheet cut by the sheet cutting device is determined by the relative ratio between the web traveling speed and the rotating blade rotational speed. When the running speed of the web is constant, the length of the sheet to be cut becomes shorter if the rotational speed of the rotary blade is increased, and becomes longer if the rotational speed is reduced. Similarly, when the rotational speed of the rotary blade is constant, the length of the sheet is shortened when the web traveling speed is lowered, and is increased when the traveling speed is increased.

  The angle between the rotating blade and the fixed blade with respect to the web is not 90 degrees with respect to the running axis of the web, but is inclined with an inclination angle. This is because the rotating blade and the fixed blade are in contact with each other when cutting the running web. The inclination angle is an angle at which the cut edge of the cut sheet is cut at a right angle to the side of the sheet. That is, the web is traveling at a predetermined speed even while being cut. Therefore, the rotating blade and the fixed blade need to be inclined with respect to 90 degrees in accordance with the length of the web that is sent between the start of cutting and the end of cutting. The tilt angle is determined by the ratio of the web traveling speed and the rotating blade rotational speed. Patent Document 2 describes a technology of a sheet cutting device that makes it possible to adjust the angle of a fixed blade combined with a rotary blade. However, when changing the length of the sheet to be cut, the angles of both the rotary blade and the fixed blade are adjusted.

  The sheet cutting apparatus needs to adjust the blade interval and the inclination angle in accordance with the thickness of the web to be cut and the length of the cut sheet.

JP 2008-195531 A JP 2007-210750 A

A sheet cutting device that cuts a web wound on a roll into a sheet having a predetermined length. A conventional sheet cutting device can quickly change the thickness of a web to be cut or change the length of a sheet. There is a problem that it cannot respond to.
This is because even if the web thickness is changed, the rotary blade and the fixed blade constituting the rotary cutter are in principle fixed to each other. Even when the length is changed, skill is required to adjust the angle of the rotary cutter.

If the blade spacing is not appropriate, uncut web will occur.
If adjustment of the tilt angle is not appropriate, the sides of the cut sheet will not be a right angle, resulting in a defective shape. Therefore, the conventional sheet cutting apparatus is not suitable for changing the setting frequently.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet cutting apparatus capable of quickly changing a blade interval and a rotary cutter angle in accordance with a change in web thickness and a change in sheet length after cutting. There is.

  In order to solve the above-described problems, the present invention includes a rotary cutter configured by combining a rotary blade unit and a fixed blade unit in order to cut a long web into a sheet, and the rotary cutter is attached to a base frame. In the sheet cutting apparatus, which includes an angle adjusting means capable of adjusting an angle of the sheet traveling along the traveling direction, and the angle of the rotary blade unit and the fixed blade unit is adjusted integrally, the rotary blade unit includes: The rotating blade and the rotating blade holder to which the rotating blade is attached and which rotates the rotating blade, and the fixed blade unit supports the fixed blade, the fixed blade holder to which the fixed blade is mounted, and the fixed blade holder The fixed blade holder is composed of a fixed blade support And a first adjusting means capable of partially adjusting the position of the fixed blade, wherein the fixed blade holder and the fixed blade support are configured to adjust the position of the fixed blade with respect to the rotating blade. The sheet cutting apparatus is characterized by being coupled via a position adjusting means.

  The rotary cutter is pivotally supported so that one end of the rotary cutter is pivotable with respect to the base frame, and the angle adjusting means positions the pivotable rotary cutter. It is what.

  In addition, the second position adjusting means includes a curved portion provided in the fixed blade holder, a curved portion receiver for slidably supporting the curved portion provided in the fixed blade support, and the fixed blade support. A sheet cutting device comprising: an adjustment stopper capable of operating the position of the fixed blade holder, wherein the position of the fixed blade holder is changed with respect to the fixed blade support by operating the adjustment stopper; It is a thing.

  Further, the fixed blade holder is a sheet cutting device characterized by having rigidity that the fixed blade does not bend when the web is cut.

  The second position adjusting means adjusts the position of the fixed blade holder with respect to the fixed blade support, the rotating shaft provided on the fixed blade support, the fixed blade holder supported on the rotating shaft so as to be rotatable. The position of the fixed blade holder is changed with respect to the fixed blade support by operating the adjustment stopper and rotating the fixed blade holder about the rotation axis. The sheet cutting device is characterized by the above.

In the cutting apparatus embodying the present invention, the adjustment of the blade distance of the rotary cutter and the adjustment of the tilt angle of the rotary cutter relative to the running direction of the web can be set completely independently without affecting each other.
Therefore, it is possible to respond quickly to the change in the thickness of the web and the change in the length of the sheet without requiring skill.

FIG. 1 is an explanatory diagram showing the overall configuration of the sheet cutting apparatus. FIG. 2 is a side view of the rotary cutter. FIG. 3 is a plan view of the rotary cutter. FIG. 4 is a front view of the rotary cutter. FIG. 5 is a side view of the fixed blade unit. FIG. 6 is a side view of the second embodiment of the fixed blade unit.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an explanatory diagram showing a configuration of a main part of the sheet cutting apparatus 15. The sheet cutting device 15 includes three parts: a web supply unit 17, a cutting unit 18, and a stacking unit 19. The web 20 is unwound from a roll (not shown), supplied to the cutting unit 18 by the web supply unit 17, cut into sheets 21 by the cutting unit 18, and the sheets 21 are stacked on the stacking unit 19. The web supply unit 17 includes guide rollers 22 and 23, speed control rollers 24 and 25, and the like. The speed control rollers 24 and 25 supply the web 20 to the cutting unit 18 at a predetermined speed. The cutting unit 18 cuts the web 20 at a right angle by the rotary cutter 3. The stacking unit 19 picks up the sheets 21 cut by the cutting unit 18 and stacks them so as not to be displaced.

  FIG. 2 is an enlarged side view showing a portion of the rotary cutter 3 of the sheet cutting device 15, and FIG. 3 is a plan view of the rotary cutter, showing the first embodiment of the present invention.

  Reference numeral 1 denotes a rotary blade unit. Reference numeral 2 denotes a fixed blade unit arranged to face the rotary blade unit 1. The rotary blade unit 1 and the fixed blade unit 2 are combined to form a rotary cutter 3. Reference numeral 4 denotes a rotary blade of the rotary blade unit 1. Reference numeral 5 denotes a rotary blade holder to which the rotary blade 4 is attached. Reference numeral 6 denotes a rotation axis of the rotary blade holder 5. The rotary blade holder 5 is rotated around the rotary shaft 6 by an electric motor whose rotational speed is controlled (not shown). The rotation direction of the rotary blade holder 5 is counterclockwise in the case of FIG. The rotary blade 4 is attached so as to protrude slightly from the outer periphery of the rotary blade holder 5.

  A fixed blade 7 faces the rotating blade 4. Reference numeral 8 denotes a fixed blade holder to which the fixed blade 7 is attached. A fixed blade support 9 supports the fixed blade holder 8. Reference numeral 11 denotes a fixing screw for fixing the fixed blade 7 to the fixed blade holder 8. Reference numeral 10 denotes a first adjusting means for performing partial position adjustment of the fixed blade 7 with respect to the rotating blade 4. A number of fixing screws 11 and first adjusting means 10 are provided along the fixed blade 7 as will be described later.

  Reference numeral 12 denotes a second position adjusting means for adjusting the position of the fixed blade holder 8 with respect to the fixed blade support 9. The second position adjusting means 12 is adapted to change the overall position of the fixed blade holder 8 with respect to the fixed blade support 9 together with a sliding mechanism of the fixed blade holder 8 and the fixed blade support 9 described later. As a result, the overall position of the fixed blade 7 with respect to the rotating blade 4 is adjusted.

  In the rotary cutter 3, the rotary blade unit 1 and the fixed blade unit 2 are integrally attached to the cutter frame 13. The cutter frame 13 is attached to the base frame 16 of the sheet cutting device 15 via the angle adjusting means 14.

The angle of the entire rotary cutter 13 relative to the running direction of the web to be cut can be adjusted by an angle adjusting means 14 described later.
If the thickness of the web is changed, the blade position between the rotary blade 4 and the fixed blade 7 is changed by the second position adjusting means 12, and if the sheet length is changed, the angle adjustment means 14 changes the running direction of the web. The angle of the rotary cutter 3 with respect to is adjusted.

  In FIG. 3, the rotary cutter 3 of the cutting part 18 is supported by the base frame 16 via the cutter frames 13 and 26. The rotary blade unit 1 is supported by the cutter frames 13 and 26 so as to be rotatable about the rotary shaft 6. The web 20 travels in the direction indicated by the arrow 27. A pivot shaft 28 connects the base frame 16 and the cutter frame 26. The cutter frame 26 is pivotally supported on the base frame 16 by a pivot shaft 28.

  The angle adjusting means 14 is constituted by adjusting screws 29 and 30. The adjusting screws 29 and 30 fix the cutter frame 13 to the base frame 16. If the adjustment screws 29 and 30 are adjusted, the position of the cutter frame 13 relative to the base frame 16 can be adjusted. By adjusting the angle adjusting means 14, the angle of the rotary cutter 3 with respect to the traveling direction of the web 20 can be adjusted as indicated by an arrow 31 around the pivot shaft 28.

  FIG. 4 is a front view of the rotary cutter 3 shown in FIG. 2 is a cross-sectional view taken along line XY shown in FIG. The rotary blade 4 is fixed to the rotary blade holder 5 by a plurality of fixing screws 35 and a plurality of adjustment screws 36. The rotating blade 4 is fixed by a fixing screw 35, but the position of the cutting edge with respect to the rotating shaft 6 of the rotating blade 4 needs further adjustment. Therefore, the position with respect to the rotating shaft 6 is partially adjusted by partially adjusting the adjusting screw 36.

  The fixed blade blade 7 is attached to the fixed blade holder 8 by a plurality of fixing screws 11 and first position adjusting means 10 in the same manner as the rotating blade blade 4. The first position adjusting means 10 can be realized by the same as the adjusting screw 36 of the rotary blade unit 1. The first position adjusting means 10 can partially adjust the position of the cutting edge of the fixed blade 7 with respect to the cutting edge of the rotating blade 4 by adjusting.

The fixed blade holder 8 has such rigidity that the fixed blade 7 does not bend when the web 20 is cut. The fixed blade holder 8 is supported by the fixed blade support 9, but its position changes with respect to the fixed blade holder 9. Therefore, it is desirable that the fixed blade 7 has rigidity that does not bend only by the rigidity of the fixed blade holder 8 at the time of cutting without depending on the rigidity of the fixed blade support 9.
The cutter frames 13 and 26 are integrally connected to the fixed blade support 9. Thus, the rotary blade unit 1 and the fixed blade unit 2 are combined to form a rotary cutter 3.

  The second position adjustment means 12 includes adjustment mechanisms 32 and 33. When the adjustment mechanisms 32 and 33 are operated, the position of the fixed blade holder 8 changes with respect to the fixed blade support 9. The second position adjusting means 12 adjusts the position of the fixed blade 7 with respect to the rotating blade 4 as a unit with the fixed blade holder 8.

  FIG. 5 is a side view of the fixed blade unit 2. As shown in FIG. 4, the fixed blade support 9 that is a support of the fixed blade unit 2 is attached to the base frame 16 together with the rotary blade unit 1 via the cutter frames 13 and 16. Reference numerals 41, 42, and 43 denote coupling screws that couple the fixed blade support 9 and the cutter frame 13. Reference numeral 44 denotes a curved portion provided in the fixed blade holder 8. The curved portion 44 includes a first curved surface 45 on the fixed blade support 9 side and a second curved surface 46 on the fixed blade blade 7 side. The first curved surface 45 and the second curved surface 46 are parallel to each other. Reference numeral 47 denotes a curved portion receiver that is provided on the fixed blade support 9 and supports the first curved surface 45. The first curved surface 45 and the curved portion receiver 47 are slidable along the curved surface. The first curved surface 45 and the curved portion receiver 47 constitute a second position adjusting means 12 together with an adjustment stopper 59 described later.

  Reference numerals 48 and 49 denote guide rollers attached to the cutter frame 13 shown in FIG. Since the guide rollers 48 and 49 are fixed to the cutter frame 13, they are structurally fixed to the fixed blade support 9. The guide rollers 48 and 49 are in contact with the second curved surface 46 of the fixed blade holder, maintain the sliding of the first curved surface 45 and the curved portion receiver 47, and prevent floating. The guide rollers 48 and 49 have an effect of stabilizing the position of the fixed blade 4 even if an impact is applied to the fixed blade 4 at the time of cutting.

  Reference numeral 50 denotes a mechanism for attracting the fixed blade holder 8 and the fixed blade support 9 to each other (hereinafter referred to as “attracting mechanism”). The attracting mechanism 50 includes a through screw 51 that passes through the fixed blade support 9 toward the fixed blade holder 8, a plurality of disc springs 52 that pass through the through screws 51, an adjustment nut 56 that is disposed so as to sandwich the disc spring 52, and a roller 53. One end 54 of the penetration screw 51 is screwed into the fixed blade holder 8. 55 is a through hole on the fixed blade support 9 side. The through hole 55 is wider than the outer shape of the through screw 51, and the through screw 51 can move freely within the through hole 55 to some extent. The disc spring 52 operates as a compression spring and pushes the roller 53 and the adjusting nut 56 apart from each other. As a result, the first curved surface 45 and the curved portion receiver 47 are elastically adhered to each other by the disc spring 52 of the attracting mechanism 50. Furthermore, the attracting mechanism 50 also acts in the direction in which the fixed blade 7 is pulled down. The roller 53 enables the through screw 51 to move with respect to the fixed blade support 9 when the fixed blade holder 8 slides with respect to the fixed blade support 9. The attracting mechanism 50 has an effect of further stabilizing the position of the fixed blade 7.

  The adjustment stopper 59 includes an adjustment screw 57 and a support block 58 that supports the adjustment screw 57. The support block 58 is fixed to the fixed blade support 9. The tip 60 of the adjustment screw 57 is in contact with the fixed blade holder 8. When the adjustment screw 57 is operated, the fixed blade 7 is integrated with the fixed blade holder 8 and moves forward and backward with respect to the rotary blade 4 shown in FIG.

As a first embodiment, as shown in FIG. 5, the second position adjusting means 12 can slide the curved portion 44 provided on the fixed blade holder 8 and the curved portion 44 provided on the fixed blade support 9. And an adjustment stopper 59 capable of operating the position of the fixed blade holder 9 with respect to the fixed blade support 9. By operating the adjustment stopper 59, the fixed blade support 9 can be operated with respect to the fixed blade support 9. The position of the fixed blade holder 8 was changed.
Thus, the entire position of the fixed blade 7 with respect to the rotating blade 4 can be easily adjusted by merely operating the second position adjusting means 12.

  The fixed blade 7 is a structure integrated with the fixed blade holder 8 when viewed from the second position adjusting means 12, and the adjustment position of the adjustment screw 57 is directly reflected in the position of the fixed blade 7. . Therefore, there is an effect that the reproducibility of the position of the fixed blade 7 is high when the adjustment screw 57 is operated. In addition, the angle adjusting means 14 and the second position adjusting means 12 are independent as adjustment operations and are not affected by each other, so that quick adjustment is possible without requiring skill.

  FIG. 6 is a side view showing a second embodiment of the present invention. Reference numeral 66 denotes a fixed blade support that supports the fixed blade unit 2. The fixed blade support 66 has the same structure as the fixed blade support 9 shown in FIG. Reference numeral 65 denotes a rotation shaft supported by the fixed blade support 66. Reference numeral 67 denotes a fixed blade holder supported on the rotary shaft 65 so as to be able to rotate. The fixed blade 7 is attached to one end of the fixed blade holder 67. An adjustment stopper 68 is provided at the other end. Reference numeral 69 denotes a compression spring formed by stacking disc springs. The compression spring 69 is located between the fixed blade support 66 and the fixed blade holder 67 and tries to rotate the fixed blade holder 67 about the rotation shaft 65 in the clockwise direction. The adjustment stopper 68 has a tip 70 screwed into the fixed blade support 66.

  When the adjustment stopper 68 is operated, the rotation angle of the fixed blade holder 67 is determined, and as a result, the interval between the rotary blade 4 and the fixed blade 7 is determined. That is, the second position adjusting means 71 in FIG. 6 includes a rotating shaft 65, a fixed blade holder 67, a disc spring 69, and an adjustment stopper 68. According to the second embodiment of the present invention shown in FIG. 6, the structure is simple.

DESCRIPTION OF SYMBOLS 1 Rotating blade unit 2 Fixed blade unit 3 Rotary cutter 4 Rotating blade 5 Rotating blade holder 7 Fixed blade 8 Fixed blade 9 Fixed blade support 10 1st position adjusting means 12 2nd position adjusting means 14 Angle adjusting means 16 Base frame 20 Web 21 Sheet 59 Adjustment stopper 66 Fixed blade support 67 Fixed blade holder 68 Adjustment stopper

Claims (5)

In order to cut a long web into a sheet, the rotary cutter includes a rotary cutter unit and a fixed blade unit, and the rotary cutter has an angle with respect to the traveling direction of the sheet traveling along the base frame. In a sheet cutting apparatus that includes an adjustable angle adjusting means, and the angle of the rotary blade unit and the fixed blade unit is adjusted as a unit,
The rotary blade unit includes a rotary blade and a rotary blade holder to which the rotary blade is attached and rotates the rotary blade.
The fixed blade unit includes a fixed blade, a fixed blade holder to which the fixed blade is attached, and a fixed blade support that supports the fixed blade holder.
The fixed blade holder includes first adjusting means capable of adjusting a partial position of the fixed blade,
The sheet cutting device, wherein the fixed blade holder and the fixed blade support are coupled to the rotating blade via a second position adjusting unit capable of adjusting a position of the fixed blade.   The rotary cutter is pivotally supported so that one end of the rotary cutter can pivot with respect to the base frame, and the angle adjusting means positions the pivotable rotary cutter. Sheet cutting device.   The second position adjusting means includes a curved portion provided on the fixed blade holder, a curved portion receiver for slidably supporting the curved portion provided on the fixed blade support, and the fixed blade support with respect to the fixed blade support. The position of the fixed blade holder is configured by an adjustment stopper capable of operating the position of the fixed blade holder, and the position of the fixed blade holder is changed with respect to the fixed blade support by operating the adjustment stopper. Sheet cutting device.   The sheet cutting device according to claim 3, wherein the fixed blade holder has a rigidity that prevents the fixed blade from bending when the web is cut.   The second position adjusting means is capable of adjusting a rotary shaft provided on the fixed blade support, a fixed blade holder supported on the rotary shaft so as to be capable of rotational movement, and a position of the fixed blade holder relative to the fixed blade support. The fixed blade holder is constituted by an adjustment stopper, and the operation of the adjustment stopper causes the fixed blade holder to rotate about the rotation axis, thereby changing the position of the fixed blade holder with respect to the fixed blade support. Item 2. The sheet cutting device according to Item 1.

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