JP2002361589A - Cutting device with circular blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting device fitted with circular blades for a band material of very thin and ductile constitution made from a resin film, metal foil, etc., or a laminated band material using such a band material as the base which is coated with other substance, whereby it is practicable to slit the band material without resulting in an elongation or without generating flaw on its surface such as scratches. SOLUTION: The cutting device fitted with the circular blades is structured so that an elastic ring 8 in cylindrical form is installed on a hold-down roll 7 provided on the outside of a second spacer block 6, wherein the outside diameter of the elastic ring 8 is made certain value greater than that of the second circular blade 4, and the hold-down roll 7 is supported rotatably relative to the second rotary shaft 2, and thereby the hold-down roll 7 is allowed to turn together with the first circular blade 3 regardless of the rotation of the second circular blade 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a round blade type for slitting a band-shaped material such as a resin film or a metal foil, or a laminated band-shaped material obtained by applying or adhering another substance to the surface of the resin film or a metal foil. The present invention relates to a cutting device, and is particularly effective for slitting a laminated strip based on an extremely thin strip. In addition, when trimming both side edges of the laminated strip, the trimming width is extremely small. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a round blade type cutting device capable of performing trimming while suppressing the size.

[0002]

2. Description of the Related Art As a prior art of this kind of round blade type cutting device, Japanese Patent Application Laid-Open Nos.
Japanese Patent Application Laid-Open No. 64527 and Japanese Patent Application Laid-Open No. 11-291194 disclose a round blade type cutting device.

A slitter described in Japanese Patent Application Laid-Open No. H10-225818 does not cause slack in a cut material between cutter blades so that a cut width dimension is as specified. This is a slitter provided with a material holding device in the cutter section for preventing scratches and cutter marks from being generated. As shown in FIG. Plural pieces 3 and 4 are incorporated so as to alternately sandwich the spacers for wide width 21 and the spacers for narrow width 22 so that the upper round blade 4 and the lower round blade 3 contact each other at the cutting line of the thin sheet W. The wide spacer 21 on the upper rotary shaft 2 side and the narrow spacer 22 on the lower rotary shaft 1 are similarly connected to the narrow spacer 22 on the upper rotary shaft 2 side and the wide spacer 21 on the lower rotary shaft 1 side. But relative to each other up and down To have been incorporated. A male rubber ring 23 is provided on the upper and lower narrow spacers 22 so as to be externally fitted thereto. The rubber ring 2 on the female side without contacting the spacer 21
4, the male rubber ring 23 is formed of rubber having a lower hardness than the female rubber ring 24 so that the thin sheet material W can be pressed by the elastic force of the male rubber ring 23 at the time of cutting. It is a slitter provided with the configured material holding device.

[0004] Since the material holding device configured as described above is provided, when the cut material is cut between the male rubber ring 23 and the female rubber ring 24 when the cut material is cut, these materials are held. Due to the pressure of the rubber ring, the outer circumference of the male rubber ring 23 is lower than the female rubber ring 24 because the hardness of the rubber ring 23 is smaller than that of the female rubber ring 23, and there is no gap between the rubber ring and the cut material. Since there is no loosening between the cutter blades, the cut material can be cut into a prescribed width dimension, and cutter marks generated by loosening are less likely to appear than in the conventional method.

[0005] Next, a cutting apparatus described in Japanese Patent Application Laid-Open No. 10-64527, which was filed by the applicant of the present invention and published, has a problem that a flare is generated near a cut end of an electrode element or a knife is cut. This is a cutting device that can cut a raw material for an electrode of a battery with high precision without causing a deterioration in quality such as a mark or the like. As shown in FIG. The first elastic ring 33
Are mounted alternately, and the round blade block 30 including the first round blade 3 and the first round blade spacer 35 is mounted alternately on the outer peripheral portion of the second rotary shaft 2. A second spacer 32 having a second elastic ring 34 mounted on at least one end of the end, and a blade holder 10 having a second round blade 4 and a disc spring 5 stacked and mounted alternately are mounted. In the cutting device, the first elastic ring 33 and the second
The round blades 3 having the outer diameters of the elastic rings 34 adjacent to each other,
4, a cutting device configured to be larger than the outer diameter of the second elastic ring, the second elastic ring facing the first round blade 3 when the first rotary shaft 1 and the second rotary shaft 2 rotate. 34
At the portion overlapping with the first round blade 3, the belt-like material W cut by the first round blade 3 and the second round blade 4 is kept in close contact with the first round blade 3 along the outer periphery of the first round blade 3. Travels in a state of being sandwiched between the outer peripheral surface of the first round blade 3 and the second elastic ring 34 until it passes through a range sandwiched between the side surfaces of two adjacent first round blades 3. Outer peripheral surface of first round blade 3 and second elastic ring 34
And the band-shaped material W cut from the raw material can be easily replaced with the two first materials without causing a waving phenomenon.
It is possible to escape from between the both side surfaces of the round blade 3, and as a result,
The cut strip W is no longer flared or marked with a knife mark.
Also in the strip W sandwiched between the first elastic ring 33 and the strip W cut from the raw material, the strip W can be easily cut from both side surfaces of the two second round blades 4 without causing a waving phenomenon. Since the belt-shaped material W can escape, flare does not occur and the knife mark is not attached.

A slitter described in Japanese Patent Application Laid-Open No. 11-291194 is a slitter which cuts a sheet-like object with a rubber roller having a flat outer peripheral surface as in the prior art. Is pressed by a large force, the outer peripheral surface portion of the rubber roller spreads in the width direction and presses the blade, and the upper blade separates from the lower blade to cause a cutting failure. In order to solve the problem that the portion protrudes from the side surface of the blade to the cutting portion and is cut off, as shown in FIG. The concave portion 55 is formed so as to be smaller than the outer dimensions of the sheet, and a sheet such as a thick sheet, a sheet of a soft material, or a foil coated with a synthetic resin or the like. Even when the sheet-like object is cut, it can be cut into a substantially right-angled state without causing burrs, high edges, etc. in the cut portion of the sheet-like object, wrinkles, etc., and the end of the rubber body is a blade. That is, it is possible to prevent a situation such as protruding from the cutting portion and being cut off.

[0007]

In a laminated strip having a surface coated with another substance such as a resin film or a metal foil, the thickness of the base resin film or the aluminum foil or the copper foil is, for example, 10 to 30 μm. An electrode material or the like is applied to a thin strip-shaped material, and the entire thickness is finished to about 150 μm to form a laminated strip-shaped material. When slitting a multi-layered strip material in which another substance is applied to such a thin base as described above, the upper round blade and the lower round blade start to overlap each other (so-called entrance side mesh point). It is effective means to restrain the band-shaped material along the outer peripheral surface of one of the round blades from the side position to the position downstream of the cutting point. However, when such a laminated strip is constrained to the outer peripheral surface of the round blade, the strip W is held along the one round blade 3 while applying tension in the traveling direction of the strip W as shown in FIG. The method of running and slitting while having an angle θ may not be able to be adopted depending on the type of the laminated strip.

Therefore, the band-shaped material is moved along the outer peripheral surface of one of the round blades from a position upstream of the point where the upper round blade and the lower round blade start to overlap to a position downstream of the cutting point. As another method of restraining the cylindrical elastic ring, as shown in FIG. 9, a cylindrical elastic ring 8 is vertically opposed to the outer peripheral surface of one round blade 3, and the outer peripheral surface of the cylindrical elastic ring 8 is A method is considered in which the outer peripheral surface of the elastic roll is pressed against the outer peripheral surface of the one round blade 3 by pressing the outer peripheral surface of the one circular blade 3.

In order to implement this method, the present inventor examined the above-mentioned prior art.
In the slitter described in Japanese Patent No. 25818, the male rubber ring 23 is formed so that the outer peripheral surface of the male rubber ring 23 comes into contact with the band W before the round blades 3 and 4 come into contact with the band W. Since the outer diameter is made larger than the outer diameter of the round blades 3 and 4, from the position upstream of the point where the upper round blade 4 and the lower round blade 3 start to overlap to the position downstream of the cutting point. It is possible to constrain the strip W along the outer peripheral surface of one of the round blades, but since the round blades 3 and 4 and the male rubber ring 23 are configured to rotate integrally, Peripheral speed of the cutting edge of the circular blades 3 and 4 and the male rubber ring 2
The peripheral speed of the outer peripheral surface of No. 3 is obviously different from that of the outer peripheral surface, and a difference in speed occurs between the cutting point and the feeding by the male rubber ring 23. Male side rubber ring 2
Although there is a difference in hardness between the rubber ring 3 and the female side rubber ring 24, since both are rubber rings, the height (pass line) of the band-shaped material W is prevented from becoming unstable in the width direction. There is also a drawback that it is not possible, so there is no problem in the case of a thin sheet with a certain degree of stiffness, but the cut is satisfactory when cutting a laminated strip based on extremely thin foil etc. which is the object of the present invention. It cannot be done.

Next, in the case of the cutting device described in Japanese Patent Application Laid-Open No. H10-64527, the strip material cut by the upper and lower round blades is forcibly escaped from between the side surfaces of two adjacent round blades. It is a cutting device that focuses mainly on the upper round blade 4
The band-shaped material W is moved from one position upstream of the point where the upper round blade 3 and the lower round blade 3 start to overlap to the position downstream of the point where the upper round blade 4 and the lower round blade 3 end the overlap with one circle. Although constrained along the outer peripheral surface of the blade, the round blade and the elastic ring are configured to rotate integrally as in the prior art described above, so the peripheral speed of the blade edge of the round blade and the elastic ring The peripheral speed differs from the peripheral speed of the outer peripheral surface.

In the slitter described in Japanese Patent Application Laid-Open No. H11-291194, the outer diameter of the rubber roller 51 and that of the round blade are the same, so that the upper round blade 4 and the lower round blade 3 begin to overlap. Between the point and the point where the overlap of the upper round blade 4 and the lower round blade 3 ends, the belt-shaped material W is
The upper and lower round blades 4 and 3 are constrained along the outer peripheral surface of one of the round blades by the outer peripheral surface. And it is impossible to cut a strip made of an extremely thin base to be cut by the present invention in a clean cut state.

The present invention has been made in view of the above-described problems, and is based on an extremely thin and easy-to-extend strip made of a resin film, a metal foil, or the like. It is an object of the present invention to provide a round-blade type cutting device capable of slitting a material to which a material is applied to form a laminated band-shaped material without giving an elongation and without inducing defects such as abrasions on the surface. I have.

[0013]

According to a first aspect of the present invention, there is provided a cylindrical cutting tool having at least one first round blade provided with cutting edges on both outer peripheral edges thereof. And at least one pair of left and right first spacers respectively adjacent to both sides of the first round blade, wherein the blade escape grooves formed by the large-diameter ring portion and the small-diameter ring portion are formed at both ends of the outer peripheral surface. A first provided at at least one end of
A first rotating shaft in which a spacer is incorporated, and a press roll provided with a cylindrical elastic ring which is vertically opposed to the first round blade and presses the material to be cut against the outer peripheral surface of the first round blade. A second spacer block provided concentrically on the outside, and at least a pair of left and right blade holders respectively adjacent to both sides of the second spacer block,
A thin round blade fitting step formed by the large-diameter ring portion and the small-diameter ring portion is provided at at least one end of both ends of the outer peripheral surface. The second consisting of a blade
A round blade type cutting device comprising: a round blade; and a second rotary shaft incorporating a blade holder on which a disc spring for biasing the second round blade in the axial direction is mounted. And the first
The first cutting edge of the second round blade mounted on the blade holder mounted on the second rotary shaft is pressed against the cutting edge of the first round blade mounted on the rotary shaft, and the first round blade is pressed against the first rotary blade.
In a round blade type cutting device for cutting a material to be cut passed between a rotating shaft and the second rotating shaft in a feed direction, the cutting device is provided on a press roll provided outside the second spacer block. The outer diameter of the cylindrical elastic ring is larger than the outer diameter of the second round blade by a predetermined value, and the presser roll is supported so as to be rotatable relative to the second rotary shaft. This is a round blade type cutting device.

In the present invention, the band-shaped material slit by the upper and lower round blades has a cylindrical elastic ring having an outer diameter of the second.
Since the outer diameter of the first round blade is set to be larger than the outer diameter of the round blade, the outer peripheral surface of the elastic ring before the point at which the first round blade and the second round blade start overlapping, that is, the so-called entrance side meshing point, is used. It is pressed so as to follow the outer peripheral surface, and proceeds to the cutting point while being sandwiched between the outer peripheral surface of the first round blade and the elastic ring. At this time, since the elastic ring is free to rotate with respect to the second rotating shaft, the elastic ring has the same speed as the outer peripheral surface of the first round blade irrespective of the rotation of the second round blade rotating integrally with the second rotating shaft. Then, it follows the first round blade. In this state, the speeds of the first round blade, the elastic ring, and the strip are the same, so that no excessive external force is applied to the strip. As a result, there is no occurrence of flare, burrs, etc. at the cut end of the band-shaped material, and the cut end becomes a clean cut. In addition, since the running strip does not meander, the trimming lines on both sides can be accurately positioned, so that the trimming width that becomes waste can be extremely reduced.

According to a second aspect of the present invention, there is provided the round blade type cutting device according to the first aspect, wherein the first round blade incorporated in the first rotating shaft is replaced by two cylindrical round blades. And a spacer provided between the two cylindrical round blades. The first round blade is divided into three parts in the axial direction, and, for example, a cemented carbide or the like is formed on both sides. A round blade type equipped with a first round blade that is economical even when the slit width of the strip to be cut is wide by arranging a cutting round blade made of high-grade material and placing a spacer made of low-grade steel in the middle It can be a cutting device.

Next, according to a third aspect of the present invention, in the round blade type cutting apparatus of the first or second aspect, the pressing roll provided on the second spacer block is divided into two sets. Thus, the left pressing roll and the right pressing roll are separately provided, and this is effective when side trimming is performed on both sides of a wide band material.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows a basic embodiment of a round blade type cutting device according to the present invention. In FIG. 1, a first rotating shaft 1 and a second rotating shaft 2 are supported in parallel by bearing means (not shown) provided on both left and right sides, and are separately provided in a cutting direction by driving means provided separately. A rotation is provided.

The first rotary shaft 1 incorporates a cylindrical first round blade 3 having cutting edges formed on both outer peripheral edges, and a first spacer 9 adjacent to both sides of the first round blade 3. ing.
The first round blade 3 and the first spacer 9 are connected to the first rotating shaft 1.
Are fixed to the central portion of the first rotating shaft 1 by a flange portion 1a provided near one end and serving as a stopper and a fastening means 1b provided near the other end. The first spacer 9 is provided with a blade escape groove 9a formed by a large-diameter ring portion and a small-diameter ring portion in a ring shape.

The second rotating shaft 2 has a second spacer block 6 and a blade holder 10 incorporated adjacent to both sides of the second spacer block 6. The second spacer block 6 and the blade holder 10 are connected to the second rotating shaft 2.
Are fixed to the central portion of the second rotating shaft 2 by a flange portion 2a provided near one end and serving as a stopper and a fastening means 2b provided near the other end.

The second spacer block 6 is provided with a cylindrical elastic ring 8 on its outer side, and is a pressing roll which is concentric with the second rotating shaft 2 and is relatively rotatable with respect to the second rotating shaft 2. 7, a rotating means 12 such as a bearing provided inside the press roll 7, and an inner peripheral surface side of the rotating means 12 fixed to the second rotating shaft 2 and an axial center of the second spacer block 6. And an inner ring unit 11 (composed of 11a and 11b) for setting a width dimension in the direction to a predetermined dimension. Also, presser roll 7
Is slightly smaller than the cutting width dimension.

Next, the blade holder 10 adjacent to the second spacer block 6 is provided with a thin round blade fitting step 10b formed by a large-diameter ring portion and a small-diameter ring portion. The second round blade 4 and the disc spring 5 are mounted on the round blade fitting step 10b in such a manner that the second round blade 4 is pressed toward the second spacer block 6 by the disc spring 5. The outer diameter of the second round blade 4 is smaller than the outer diameter of the second spacer block 6, that is, the outer diameter of the elastic ring 8 outside the press roll 7 by a predetermined value. The outer peripheral surface slightly protrudes from the edge of the second round blade 4.

Further, the width of the first round blade 3 incorporated in the first rotating shaft 1 and the width of the inner ring unit 11 of the second spacer block 6 incorporated in the second rotating shaft 2 are each a band to be cut. It is almost the same size as the cutting width of the material,
The blade edge side of the first round blade 3 incorporated in the first rotating shaft 1 and the blade holder 10 incorporated in the second rotating shaft 2
The center plane of the first round blade 3 in the axial direction and the center plane of the second spacer block 6 in the axial direction are so set that the cutting edge of the second round blade 4 mounted on the first and second round blades 4 abuts equally on the left and right. The first rotating shaft 1 and the second rotating shaft 2 are relatively adjusted in the axial direction so as to be on the same plane. In addition, the distance between the first rotary shaft 1 and the second rotary shaft 2 is set so that the blade edge of the first round blade 3 and the blade edge of the second round blade 4 made of a thin round blade overlap vertically by a predetermined amount. The distance is adjusted, and the blade side surface of the first round blade 3 and the blade side surface of the second round blade 4 are in contact with each other by a predetermined side pressure by the urging force of the disc spring 5.

In such a state, if the first rotating shaft 1 and the second rotating shaft 2 are respectively rotated in the cutting direction and the belt-shaped material W is passed between the first rotating shaft 1 and the second rotating shaft 2,
The strip W is slit into a predetermined width by the first round blade 3 and the second round blade 4, that is, the same width as the width of the first round blade 3. At this time, since the outer peripheral surface of the cylindrical elastic ring 8 provided outside the presser roll of the second spacer block 6 is slightly protruded from the cutting edge of the second round blade 4, FIG.
In the same manner as described above, the outer peripheral surface of the elastic ring 8 near the cutting point is deformed along the outer peripheral surface of the first round blade 3 within a predetermined range. The belt-shaped material W passed between the rotary shaft 2 and the cutting shaft is pressed against the outer peripheral surface of the first round blade 3 by a pressing roll 7 provided with an elastic ring 8 made of an elastic body on the upstream side of the cutting point. It enters the cutting point as it is, and is continuously cut by the cutting edge of the first round blade 3 and the cutting edge of the second round blade 4.

Since the press roll 7 is rotatable relative to the second rotating shaft 2 by the rotating means 12, the elastic ring 8 provided outside the press roll 7 is provided.
Can rotate freely irrespective of the rotation of the second round blade 4 so that the elastic ring 8 is driven by the outer circumferential surface of the first round blade 3 at the same speed as the outer circumferential surface of the first round blade 3. There is no speed error in the running direction between the front surface and the back surface of the belt-shaped material W that is turned and interposed therebetween.

Next, in the round blade type cutting device shown in FIG. 2, the first round blade 3 incorporated in the central portion of the first rotary shaft 1 is made into two disk-shaped round blades 36 and the two round blades 36. A block round blade is constituted by an intermediate spacer 37 provided in the middle of the disk-shaped round blade 36. The disk-shaped round blade 36 is a round blade made of an expensive material, and the spacer 37 is made of low-grade steel. The round blade type cutting device provided with the economical first round blade 3 can be obtained.

Next, in the round blade type cutting device shown in FIG. 3, the first round blade 3 incorporated in the center of the first rotary shaft 1 is divided into two disk-shaped round blades 36 and an intermediate spacer 37. The press roller 7 of the second spacer block 6 incorporated in the center of the second rotating shaft 2 is divided into two, and is provided separately on the right press roller 7a and the left press roller 7b. Thus, it can be used as a cutting device for side trimming of both ends of the wide band material. Also in this configuration, the width of the first round blade 3 including the two cylindrical round blades 36 and the intermediate spacer 37, and the inner ring unit 11 (11a,
11b, 11c) are approximately the same as the slit width of the strip.

FIG. 4 is a view showing an embodiment of a round blade type cutting device for slitting a wide band-like body into a plurality of strips, which is incorporated in a first rotary shaft 1. Among the plurality of first spacers 9, the first spacers 9 incorporated between the first round blades 3 have cutting edge relief grooves 9 a formed at both end portions of the outer peripheral surface.
A plurality of blade holders 10 incorporated in the second rotary shaft 2 vertically opposed to the spacer 9 also have thin round blade fitting step portions 10b formed on both side ends of the outer peripheral surface. The second round blade 4 and the disc spring 5 are mounted on the round blade fitting step 10b. Then, in such a state, if the first rotating shaft 1 and the second rotating shaft 2 are rotated in the cutting directions and the belt is passed between the first rotating shaft 1 and the second rotating shaft 2, Is the first round blade 3 and the first round blade 3 incorporated between the first round blade 3 and the first round blade 3 by the second round blade 4.
The slit is slit into a plurality of strips having the same width dimension as the spacer 9. Also, both side edges of the strip are trimmed with high precision and narrow width.

[0028]

As described above, according to the present invention,
Extremely thin and easy-to-extend strips made of resin film, metal foil, etc., or based on these strips, without applying any other substance to the strips to give a stretched strip, etc. Since the slit can be formed, a clean cut can be obtained without generating harmful flare, burrs, high edges, and the like. Further, abrasion or the like is not induced on the surface of the band-shaped material. Also,
Since the running strip does not meander, the trimming lines on both sides can be accurately positioned, so the trimming width on both sides can be extremely small.
For example, it is possible to improve the yield even in a slit of an expensive laminated strip material such as an electrode material, and at the same time, the number of parts to be discarded is reduced and the environment is friendly.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of a round blade type cutting device of the present invention.

FIG. 2 is a view showing another embodiment of the round blade type cutting device of the present invention.

FIG. 3 is a view showing another embodiment of the round blade type cutting device of the present invention.

FIG. 4 is a view showing another embodiment of the round blade type cutting device of the present invention.

FIG. 5 is a schematic diagram for explaining an example of a conventional material holding device for a slitter cutter unit.

FIG. 6 is a schematic diagram for explaining an example of a conventional round blade type cutting device.

FIG. 7 is a schematic diagram for explaining an example of a conventional slitter.

FIG. 8 is a schematic view showing an example of a slitting method in a conventional slitter.

FIG. 9 is a schematic diagram for explaining a state near a cutting point in the slitter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st rotating shaft 2 2nd rotating shaft 3 1st round blade 4 2nd round blade 5 Disc spring 6 2nd spacer block 7 Holding roll 7a Right holding roll 7b Left holding roll 8 Elastic ring 9 1st spacer 10 Blade holder 11 Inner ring unit 12 Rotating means 36 Disc-shaped round blade 37 Intermediate spacer W Band-shaped material θ Body angle

Claims (3)

[Claims] At least one first round blade provided with cutting edges on both sides of a cylindrical cutting tool, and at least a pair of left and right first spacers respectively adjacent to both sides of the first round blade. A first rotation in which a first spacer provided with a blade escape groove formed by the large-diameter ring portion and the small-diameter ring portion at at least one end of both ends of the outer peripheral surface; A shaft and a pressing roll having a cylindrical elastic ring which is vertically opposed to the first round blade and presses the material to be cut on the outer peripheral surface of the first round blade are provided concentrically on the outside. Two spacer blocks and at least a pair of right and left blade holders respectively adjacent to both sides of the second spacer block, the thin round blade fitting step formed by the large-diameter ring portion and the small-diameter ring portion being formed around Less of the edges on either side of the face At least at one end, a second round blade made of a thin round blade and a disc spring for urging the second round blade in the axial direction are superposed and mounted on the thin round blade fitting step. A cutting blade holder and a second rotary shaft incorporating the second rotary shaft, wherein the second rotary shaft is mounted on the first rotary shaft with respect to the cutting edge side surface of the first round blade. The cutting edge side surface of the second round blade mounted on the blade holder incorporated in the rotating shaft is pressed against the cutting surface to feed the workpiece passed between the first rotating shaft and the second rotating shaft in the feed direction. In the round blade type cutting device that cuts along the edge, the outer diameter of the cylindrical elastic ring provided on the pressing roll provided outside the second spacer block is more than a predetermined outer diameter of the second round blade. And the presser roll is rotatable relative to the second rotation axis. Circular saw slicing apparatus characterized by being supported. 2. A round blade block in which a first round blade incorporated in a first rotating shaft is composed of two cylindrical round blades and a spacer provided between the two cylindrical round blades. The round-blade type cutting device according to claim 1, wherein: 3. The holding roll provided on the second spacer block is divided into two sets, and is provided separately as a left holding roll and a right holding roll. 3. The round blade type cutting device according to 2.