JP2003080490A - Slitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slitter capable of completely automating exchange of a cutter and a slitter and effectively inhibiting the waving of a band material after cutting. SOLUTION: In the slitter, a plurality of cutters 12 are arranged on a pair of upper/lower rotation shafts at a predetermined interval and a plate material W passing through between the cutters is cut and formed to the band materials (w) having a width corresponding to the intervals of the cutters 12 by rotating the rotation shafts 11 in a reverse direction each other. The slitter has a first roller arranged near a cutting position A of the plate material W by the cutters 12 at a side where it is cut by the cutters 12 and is fed out as the band materials (w) and butting to one surface of the band materials (w); and a second roller 2 arranged at a downstream side of a traveling direction of the band materials (w) as compared with this first roller 1 and butted to the other surface of the band materials (w). It is preferable that the first roller 1 and the second roller 2 are arranged such that a gap 1 between periphery surfaces of the rollers becomes larger than a plate thickness t of the band materials (w) and it is preferable that these rollers are made to driving rollers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention rotates blades arranged on a pair of upper and lower rotary shafts at a predetermined interval together with the rotary shafts, and passes a material between the rotating blades so that the blades can be spaced apart from each other. The present invention relates to a slitter formed by cutting a strip material having a corresponding width.

[0002]

2. Description of the Related Art A slitter is provided in a part of a strip material forming device for cutting and forming a strip material having a predetermined width from a sheet material, and is arranged at a predetermined interval while unwinding a wide sheet material wound in a coil shape. It is a device that cuts into strips having a width according to the number and intervals of the blades that are passed between the rotating blades. As shown in FIG. 5 (a), such a slitter includes a plurality of blades 12 (a blade 12 when referring to an individual blade) at a predetermined interval on each of a pair of upper and lower rotary shafts 11, 11 that are arranged to face each other. ₁ , 12 ₂ , 12, ₃ ... are attached with subscripts), and the blades 12 ₁ , 12 are rotated by rotating the blades 12, 12 together with the rotary shafts 11, 11.
12 _{2, 12} 3, ... of the strip line width corresponding to the distance w (when referring to the individual strip is described as strip w1, w2, w3, ...) the cutting, to form It is a thing. Then, the band materials w1, w2, w3 ...
In order to stably obtain the blades 12 ₁ , 12 ₂ , 12 ₃ ,
.. With one or a plurality of spacers 13 having a predetermined width interposed therebetween, the blades 12 ₁ , 12 ₂ , 12 ₃ ... Are positioned and fixed with high precision.

By the way, the conventional slitter having the above structure has the following problems. The above-mentioned slitter has a pair of upper and lower rotary shafts 11, 11 in which the blades 1 are staggered.
Since the plate material W is cut (sheared) by 2 ₁ , 12 ₂ , 12 _3, ...
..When cutting strips, the cut strips w1, w2, w3
There is a problem that both ends of ... easily bite into the blades 12 ₁ , 12 ₂ , 12 _3, .... For example, in the example shown in FIG. 5B, the band material w1 bites the blades 12 ₂ and 12 ₄ and the band material w2 bites the blades 12 ₃ and 12 ₅ so that the rotary shaft 11 rotates. Cutlery 12 ₂ and Cutlery 12 ₄
Thus, the strip w1 is pulled, and the strip w2 is pulled by the blade 12 ₃ and the blade 12 ₅ . Therefore,
As shown in (c), the cut strips w1, w2, w3
... is wavy near the plate cutting position A, and the blade 12,
In addition to hindering smooth cutting of the plate material W by 12, the quality of the strips w1, w2, w3 ... Is adversely affected.

Therefore, as shown in FIG. 6, each blade 1
A rubber ring 14 between 2 ₁ , 12 ₂ , 12 ₃ ...
The rubber rings 14 are used to cut the strips w1, w2, w3, ... Immediately after cutting the blades 12 ₁ , 12 ₂ ,
By forcibly excluding it from between 12 ₃ ...
1, w2, w3 ... blades 12 ₁ , 12 ₂ , 12 ₃ ...
.. Prevents biting into and prevents waving immediately after cutting.

However, according to this method, the blade 12₁, 12
_Two, 12_ThreeThe ring 14 is also attached to the rotary shaft 11 when replacing.
On the other hand, it has to be attached and detached, which increases the work man-hour
There is a problem that it takes a lot of time for replacement. Also,
It is difficult to automatically replace the ring 14₁，
12_Two, 12 _Three... and automation of replacement of spacer 13
It is also one of the factors that prevent In addition, the rubber
Ring 14 wears quickly and requires frequent ring 14 replacement
Therefore, the operating rate of the slitter is reduced, and the plate material W and
Look at the ring 14 suitable for strips w1, w2, w3 ...
It is difficult to put on, it takes a long time to replace it, and workability is poor.
There is a problem. Therefore, we abolished such a ring
A so-called ringless slitter is disclosed, for example, in Patent No. 2
It is proposed in Japanese Patent No. 853957.

The slitter described in this publication is shown in FIG.
2, two sets of pinch rollers 16a, 16b, 17a, 17b are arranged in front of and behind the rotating shafts 11, 11, and the pinch rollers 16a, 16b and the pinch rollers 17a, 17 are arranged.
The strips w1, w2, w3 ... Are clamped and rotated by b. In this case, the downstream pinch rollers 17a, 17
By setting the rotation speed of b to be higher than the rotation speed of the upstream pinch rollers 16a and 16b,
a plate material W between a and 16b and pinch rollers 17a and 17b
And a certain amount of tension is applied to the strips w1, w2, w3 ..., By this, the strips w1, w2, w3 ...
Suppresses the waviness caused by the bite of the blades 12 ₁ , 12 ₂ , 12 _3, ...

However, the plate material W is generally characterized in that the plate thickness is large at the central portion and small at both end edges. This is mainly due to the processing accuracy of the plate material W by the plate manufacturer. For example, in the plate material W having a plate thickness of 1 mm, the plate thickness t1 at the central portion is 1 mm, whereas the plate at both end portions is Thickness t2 is 0.9 mm to 0.95 m
It is as small as about m. Therefore, the pinch roller 1
The pinching force of the pinch rollers 16a and 16b and the pinch rollers 17a and 17b varies between the both ends and the center of the plate material W.
Plate material W and strip materials w1, w2, w3 between 7a and 17b
There is a problem in that the tensions of ... vary. That is, as schematically shown in FIG. 7B, the pinch rollers 16a, 16b,
There is a problem that the clamping force by 17a and 17b becomes small, sufficient tension cannot be obtained, and corrugation of the strip w immediately after cutting cannot be sufficiently suppressed.

[0008]

SUMMARY OF THE INVENTION The present invention has been conceived in view of the above problems, and an object thereof is to completely replace a cutting tool and a slitter without requiring a ring such as a rubber ring. (EN) A slitter capable of effectively suppressing waviness caused by the band material sticking to a blade after cutting, and capable of stably performing a cutting process to obtain a high-quality band material. Where it is.

[0009]

In order to solve the above-mentioned problems, the invention as set forth in claim 1 arranges a plurality of blades on a pair of upper and lower rotary shafts at predetermined intervals, and the rotary shafts are arranged in opposite directions. By rotating, the plate material passing between the blades is cut and formed into strips having a width corresponding to the interval between the blades, in a slitter, which is cut by the blades and fed out through the strips, depending on the blades. A first roller that is arranged near the cutting position of the plate member and is in contact with one surface of the band member, and is arranged on the downstream side of the first roller in the traveling direction of the band member, and the band member. And a second roller arranged so as to contact the other surface. According to this configuration, when the strip material bites the cutter of the slitter when the plate material is cut, and the strip material tries to rotate together with the blade, this rotation is caused by the first roller and the second roller provided near the cutting position. Regulated by the roller. Therefore, even if the strip material bites into the blade, the strip material is detached from the blade and sent out relatively early after cutting. for that reason,
The plate material can be cut stably, and the quality of the band material can be kept good.

The distance between the roller peripheral surfaces of the first roller and the second roller may be larger than the plate thickness of the strip material as described in claim 2. By doing so, the strip material can pass between the first roller and the second roller without being sandwiched between the first roller and the second roller. Therefore, the tension of the strip does not vary between the first roller and the second roller.

According to a third aspect of the present invention, the first roller, which is arranged closer to the blade than the second roller, has a roller peripheral surface which is in contact with the band member and is the same as the running axis of the band member. It is better to arrange it so that it is at the height. The cutting of the plate material is
It is preferable to perform it at the portion where the upper and lower blades intersect. With the configuration according to the invention described in claim 3, the cutting position of the plate material by the blade can be maintained in a good condition.

According to a fourth aspect of the present invention, the second roller is arranged such that the roller peripheral surface that is in contact with the strip material projects toward the one surface side with respect to the traveling axis of the strip material. is there. By projecting the second roller toward the one surface side from the traveling axis of the strip, the strip is pulled, whereby tension is applied to the strip. Since this tension is effectively applied in the vicinity of the cutting position of the plate material, the strip material can be more smoothly separated from the blade, and the effect of suppressing waviness can be further enhanced.

According to a fifth aspect of the present invention, at least one of the first roller and the second roller is rotated in the same direction as the traveling direction of the strip by the driving means. The peripheral speed of the roller peripheral surface may be the same as the traveling speed of the strip material, but as described in claim 6,
It is preferable that the first roller or the second roller is rotated so that the peripheral speed of the roller peripheral surface becomes higher than the traveling speed of the strip. With this structure, the tension acting on the strip w can be further increased, and the effect of suppressing waviness can be further increased.

According to a seventh aspect of the present invention, at least one of the first roller and the second roller is crossed in the front-rear direction along the traveling axis of the plate and the band and / or the traveling axis. The position can be adjusted in the vertical direction. With such a configuration, it becomes possible to adjust the position of the first roller and / or the second roller to an optimum position according to the plate thickness and material of the plate material. In particular, by making it possible to adjust the position of the second roller in the vertical direction, it becomes easy to adjust the tension applied to the strip material to an optimum one.

According to an eighth aspect of the present invention, the roller peripheral surface of one or both of the first roller and the second roller that come into contact with the strip is made of rubber, resin or non-woven fabric. It is as a configuration. With this configuration, it is possible to increase the frictional resistance between the strip and the roller peripheral surface and to pull the strip more strongly.

According to a ninth aspect of the present invention, a tension roller that applies a tension to the strip immediately after being cut is provided at least on the downstream side of the blade, and the first roller and the second roller are provided. It is provided between the tension roller on the downstream side and the cutting position.
Thus, by applying tension to the strip material in advance with the tension roller, the effect of suppressing waviness due to the bite of the strip material biting the blade can be further enhanced.

According to a tenth aspect of the present invention, a diameter smaller than that of the first roller and / or the second roller is provided between the first roller and / or the second roller and the cutting position. The third roller is further provided.
With this configuration, the third roller can be arranged very close to the cutting position, and the waviness can be suppressed more effectively. This invention is a non-slip process such as rotating the first roller or the second roller by a motor or the like, or coating the roller peripheral surface of the first roller or the second roller with rubber. This is particularly effective when there is a certain limit to the reduction of the diameter of the first roller and the second roller, as in the case where it is necessary to do so.

According to an eleventh aspect of the present invention, one or more fourth rollers are further provided in front of the first roller and the second roller. This configuration is particularly effective when the second roller is arranged so as to project from the traveling axis of the strip, as in the case described in claim 4. That is, by disposing the fourth roller in front of the second roller and guiding the strip to the traveling axis by the fourth roller, the strip pushed up by the second roller is The roller can quickly return to the traveling axis, and the tension of the strip near the cutting position by the second roller can be efficiently increased.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will now be described in detail with reference to the drawings. [First Embodiment] FIG. 1 is a side view for explaining the configuration of a main part of a slitter according to a first embodiment of the present invention. FIG. 2 shows the first roller and the second roller of FIG. It is the front view seen from the I direction. The plate material W is cut (sheared) at the part where the upper and lower blades 12, 12 of the slitter intersect, that is, at the plate material cutting position A in FIG. And the plate cutting position A
The strip w formed by being cut by the upper and lower blades 12, 12 is pulled out in the right direction in the figure. The first roller 1 and the second roller 2 are disposed above and below the strip w on the downstream side in the traveling direction of the strip w (the downstream side may be referred to as “front” and the upstream side as “rear”). It is distributed and arranged. The first roller 1 and the second roller 2 are arranged eccentrically with respect to each other in the front-rear direction along the traveling axis C along which the plate material W and the strip material w travel and in the up-down direction intersecting with the traveling axis C. .

In the first roller 1 and the second roller 2, the strip material w is cut immediately after the strip material w is cut and formed from the plate material W.
In order to more effectively suppress the waviness caused by biting into the blades 2 and 12, it is preferable to arrange them as close to the plate material cutting position A as possible. By making the outer diameter dimensions of the first roller 1 and the second roller 2 as small as possible, the first roller 1 and the second roller 2 are moved to the plate material cutting position A without interfering with the blades 12, 12. Can be placed closer to.

As shown in FIG. 2, the first roller 1 is attached to a rotary shaft 3 arranged near the downstream side of the blades 12, 12 and rotates integrally with the rotary shaft 3. . The rotary shaft 3 is rotatably supported at its opposite ends by bearings 3a and 3a on a base 18 and a support 19 which rotatably support the rotary shaft 11. A first motor M1 which is a driving body for rotating the first roller 1 is attached to the base 18. Then, a drive side pulley 5a that is rotated by the drive of the first motor M1,
A belt 7 for driving force transmission is wound around a driven pulley 5b attached to one end of the rotary shaft 3.

Similarly, the second roller 2 is attached to the rotary shaft 4 arranged in front of the rotary shaft 3 in the traveling direction of the strip w, and rotates integrally with the rotary shaft 4. . The rotating shaft 4 is rotatably supported by bearings 4a, 4a on a base 18 and a support 19 that rotatably support the rotating shaft 11. A second motor M2, which is a driving body for rotating the second roller 2, is attached to the base 18. A belt 8 for driving force transmission is wound between a drive pulley 6a that is rotated by the drive of the second motor M2 and a driven pulley 6b that is attached to one end of the rotary shaft 4. .

The rotation speeds of the first roller 1 and the second roller 2 are the speeds (circumferential speeds) of the roller peripheral surface which is in contact with the strip material w.
However, it is preferable to set the speed slightly higher than the traveling speed of the strip w. The rotation speeds of the first roller 1 and the second roller 2 are, for example, from the rotation speed of the rotation shaft 11 to the band w.
Can be calculated by calculating the traveling speed v of the above and adding the additional speed α to this traveling speed. Then, based on this traveling speed (v + α), a drive command may be output to the first motor M1 and the second motor M2.
The control of driving the first motor M1 and the second motor M2 can be performed by a control device that issues a motor drive command for rotating the rotary shafts 11, 11.

The first roller 1 arranged in the vicinity of the material cutting position A is designed so that when the plate material W is cut by the cutting tool 12, the plate material W can be cut while being kept substantially horizontal. It is preferable that the level of the roller peripheral surface that abuts the material w is substantially the same as the traveling axis C of the strip material w and the plate material W. On the other hand, the second roller 2
In order to increase the traveling path of the strip w by lifting a part of the strip w, thereby increasing the tension of the strip w in the vicinity of the cutting tool 12, the level of the roller peripheral surface contacting the strip w is It is arranged to be slightly higher than the traveling axis C. The lifting height h1 of the band w is the band w
It is preferable that h1 is in the range of 10 mm to 20 mm, though it varies depending on the material, the traveling speed, the plate thickness of the strip w, and the like. Incidentally. It is preferable that the rotary shaft 4 is supported by the base 18 and the support 19 so that the height position can be adjusted, and the height h1 can be adjusted according to the change in the above conditions. Further, the clearance dimension 1 between the roller peripheral surfaces of the first roller 1 and the second roller 3 through which the strip material w passes is set to be about 2 to 10 times the plate thickness of the strip material w. Is good.

According to the slitter having the above structure, the upper and lower rollers (the first roller 1) provided near the plate material cutting position A are used.
And the second roller 2) separates the strip w from the blades 12, 12 immediately after cutting and forming, and smoothly sends it along the traveling axis C without causing waviness. Also,
The second roller 2 partially lifts the strip w and applies tension to the strip w in the vicinity of the plate cutting position A, so that the corrugation of the strip w is effectively suppressed. As described above, this tension is applied by the second roller 2 partially lifting the strip material w, and the strip material w is sandwiched between the first roller 1 and the second roller 2. Even if there is some variation in the plate thickness of the strip w, the variation in the tension between the plate cutting position A and the strip w of the second roller 2 is small.

Next, another embodiment of the present invention will be described with reference to FIGS. [Second Embodiment] FIG. 3 is a side view for explaining the structure of a main part of a slitter according to a second embodiment of the present invention. The same members and parts as those of the first embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted. In the slitter of this embodiment, a roller 9a having a diameter smaller than that of the first roller 1 is arranged between the first roller 1 and the material cutting position A, and the second roller 2 and the material cutting position A are arranged. Further, a roller 9b having a diameter smaller than that of the second roller 2 is arranged. The rollers 9a and 9b, which are the third rollers, are rotatably supported by the base 18 and the support 19 (see FIG. 2).
The vertical positions of the rollers 9a and 9b are determined so that their circumferential surfaces come into contact with the strip w on the traveling axis C, and the rollers 9a and 9b have a size larger than at least the plate thickness of the strip w. The rollers are arranged so as to be spaced apart from each other in the front-rear direction so as to form a gap between the roller peripheral surfaces. The gap dimension between the roller peripheral surfaces of the rollers 9a and 9b may be substantially the same as the gap dimension 1 between the first roller 1 and the second roller 2 described in the above embodiment, and the strip material w It is advisable that the thickness is about 2 to 10 times the plate thickness.

This embodiment is advantageous when the outer diameter of the first roller 1 and / or the second roller 2 cannot be made smaller than a certain size by design. That is,
Since it can be arranged closer to the material cutting position A than the first roller 1 and / or the second roller 2, the occurrence of waviness due to the strip w sticking to the blades 12, 12,
It can be suppressed very close to the material cutting position A. In the example shown in FIG. 3, the roller 9a located on the upper side of the strip w is arranged closer to the plate material cutting position A than the roller 9b located on the lower side, but the roller 9b arranged on the lower side. May be placed closer to the plate material cutting position A. Also, two rollers 9 are provided above and below the strip w.
Although a and 9b are arranged, the roller 9a or the roller 9b is provided.
Either one of the above may be provided. Further, as shown in FIG. 3, a roller 9c that is a fourth roller may be provided in front of the second roller 2. This roller 9c
Between the second roller 2 and the material cutting position A by forcibly returning the strip material w partially lifted from the traveling axis C by the second roller 2 onto the traveling axis C. The tension of the strip material w can be increased more efficiently, and the effect of suppressing waviness can be further enhanced.

[Third Embodiment] FIG. 4 is a diagram showing a third embodiment of the present invention. The same members and parts as those of the first and second embodiments described above are designated by the same reference numerals,
Detailed explanation is omitted. The slitter of this embodiment can realize the inventive concept of the present invention in the simplest way. In this embodiment, the first roller 1 and the second roller which freely rotate are arranged near the plate material cutting position A. The first roller 1 and the second roller 2 are rotatably supported by a base 18 and a support 19 (see FIG. 2). Similar to the above-described embodiment, the first roller 1 and the second roller 2 are arranged so as to be distributed above and below the strip material w,
Further, the rollers are arranged so as to be eccentric to the front and rear in a state in which the gap between the roller peripheral surfaces is separated by about 2 to 10 times the plate thickness of the strip w.

In this embodiment, the roller peripheral surfaces of the first roller 1 and the second roller 2 which are in contact with the strip w are positioned at the same level as the traveling axis C of the strip w. By making the outer diameters of the first roller 1 and the second roller 2 as small as possible, the arrangement positions of the first roller 1 and the second roller 2 can be brought close to the plate material cutting position A. As explained earlier. With this configuration, the strip w is separated from the blades 12, 12 by the first roller 1 and the second roller 2 in the vicinity of the plate cutting position A, and the strip w bites the blades 12, 12. Rippling is suppressed by attaching.

Although the preferred embodiment of the present invention has been described, the above-mentioned first roller 1, second roller 2, rollers 9a, 9b, 9c, etc. of the present invention are tension rollers 16a shown in FIG. , 16b, 17a, 17b, a higher effect can be obtained by applying to a conventional slitter. Further, the present invention is not limited to the above embodiments. For example, in the above embodiment, the first roller 1 located above the strip w is arranged closer to the plate material cutting position A than the second roller 2 located below the strip w. However, the second roller 2 may be arranged closer to the plate material cutting position A than the first roller 1.

In the first and second embodiments described above, both the first roller 1 and the second roller 2 are rotationally driven by the motors M1 and M2. You may comprise so that either one of the two rollers 2 may be rotationally driven. Further, the drive of the motors M1 and M2 is transmitted to the first roller 1 and the second roller 2 via the pulley and the belt, but the first roller 1 and the second roller 2 are driven by the motors M1 and M2. May be rotated directly.

[0032]

According to the present invention, the first roller and the second roller provided in the vicinity of the cutting position effectively suppress the corrugation of the band material immediately after cutting, thereby cutting the plate material and the band material. The quality and can be stable. Further, since it is not necessary to provide a ring such as a rubber ring, it becomes easy to replace the blade and the slitter, and it is possible to provide a low-priced slitter, and also to promote automation of the blade and the slitter. It is possible to obtain a slitter capable of forming a strip material of stable quality at low cost.

[Brief description of drawings]

FIG. 1 is a side view illustrating a configuration of a main part of a slitter according to a first embodiment of the present invention.

FIG. 2 is a front view of the first roller and the second roller of FIG. 1 viewed from the I direction.

FIG. 3 is a side view illustrating a configuration of a main part of a slitter according to a second embodiment of the present invention.

FIG. 4 is a side view illustrating a configuration of a main part of a slitter according to a third embodiment of the present invention.

FIG. 5 is a schematic diagram for explaining a conventional slitter and a problem that the slitter has.

FIG. 6 is a schematic view of a slitter having a rubber ring between blades according to a conventional example of the present invention.

FIG. 7 is a schematic view of a slitter in which tension rollers are provided before and after the slitter according to a conventional example of the present invention,
(B) is the figure which showed typically the problem which the slitter of (a) has.

[Explanation of symbols]

1 first roller 2 second roller 3,4 rotation axis 9a, 9b roller (third roller) 9c roller (fourth roller) 11 rotation axis 12 cutlery 13 Spacer 18 bases 19 Support M1 first motor M2 second motor A Plate cutting position W plate material w band material

Claims (11)

[Claims] 1. A plurality of blades are arranged on a pair of upper and lower rotating shafts at a predetermined interval, and the rotating shafts are rotated in opposite directions so that the plate material passing between the blades can be moved in accordance with the interval of the blades. In a slitter for cutting and forming into strips of different widths, a slitter which is cut by the blade and is fed out as a strip is disposed in the vicinity of the cutting position of the plate material by the blade and is in contact with one surface of the strip. And a second roller arranged downstream of the first roller in the traveling direction of the strip and arranged so as to contact the other surface of the strip. Characteristic slitter. 2. The first roller and the second roller are arranged such that the distance between the roller peripheral surfaces is larger than the plate thickness of the strip material. Slitter. 3. The first roller is arranged so that a roller peripheral surface that abuts on the belt member has the same height as a traveling axis of the belt member. The listed slitter. 4. The second roller is arranged such that a roller peripheral surface that is in contact with the strip material projects toward the one surface side with respect to a traveling axis of the strip material.
The slitter according to any one of 3 above. 5. A drive means for rotating at least one of the first roller and the second roller in the same direction as the running direction of the strip.
The slitter according to any one of to 4. 6. The peripheral speed of the roller peripheral surface of the drive means is
The slitter according to claim 5, wherein the first roller or the second roller is rotated so as to be higher than the traveling speed of the strip. 7. The position of at least one of the first roller and the second roller can be adjusted in the front-rear direction along the traveling axis of the plate and the belt and / or in the vertical direction intersecting the traveling axis. Claim 1 characterized in that
7. The slitter according to any one of to 6. 8. The roller peripheral surface of one or both of the first roller and the second roller that come into contact with the strip is formed of rubber, resin, or non-woven fabric. The slitter according to any one of 1 to 7. 9. A tension roller for applying a tension to the strip immediately after being cut is provided at least on the downstream side of the blade, and the first roller and the second roller are provided on the downstream side of the tension roller. 9. The slitter according to claim 1, wherein the slitter is provided between the cutting position and the cutting position. 10. A third roller having a diameter smaller than that of the first roller and / or the second roller is further provided between the first roller and / or the second roller and the cutting position. The slitter according to claim 1, wherein the slitter is provided. 11. The slitter according to claim 1, further comprising one or a plurality of fourth rollers in front of the first roller and the second roller.