JP3619618B2 - Raw material cutting device and strip cutting device for battery electrode - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cutting device for cutting a raw material for an electrode of a battery such as a lithium ion secondary battery to form a band-shaped member having a predetermined width, and a band-shaped body cutting device.
[0002]
[Prior art]
As a cutting device for cutting a raw material for an electrode of this type of lithium-ion battery to form a strip-shaped member having a predetermined width , Japanese Utility Model Laid-Open No. 3-120397 (hereinafter referred to as Document 1) and actual . There is one described in Kaihei 3-29292 (hereinafter referred to as Document 2) .
In the apparatus described in Document 1, a narrow tape that has been hollowed out by cutting has a poor cut and is discarded as cutting waste. Apparatus described in Document 2, by fixing the elastic ring to a fixed flange which is fixed to the shaft, eliminating the need for labor of replacement of the elastic rings for replacement or movement of the circular blade.
[0003]
[Problems to be solved by the invention]
In the apparatus described in Document 1, since the cutting waste having a narrow width and cut out as described above is discarded as described above, the yield when cutting the raw material into a predetermined width is poor . In particular, since the electrode material of a lithium ion battery is expensive, it is extremely uneconomical to discard. In the apparatus described in Document 2, a sheet cut by a round blade by fixing an elastic ring having a diameter smaller than that of the round blade on at least one side surface of the round blade is formed on the outer peripheral surface of the round blade and the outer peripheral surface of the elastic ring. In order to stably support the sandwiched sheet, vibrations and undulations are not generated in the raw sheet, and the cutting state of the round blade is not unstable.
[0004]
The strip-shaped member cut into a plurality of strips is sandwiched between the side surfaces of the two round blades while being in close contact with the elastic ring immediately after cutting. A belt-like member discharging means such as a blade or a separator ring is required. Even if such a discharging means is used, there is some space between the elastic roll and the discharging means and between the discharging means and the side surfaces of the round blades on both sides. The band-shaped member sandwiched between the side surfaces of the blade is forcibly separated. Therefore, when a very thin foil or the like is cut with a material that is easily plastically deformed, a waving phenomenon occurs in the vicinity of the shear cut edge of the belt-like member (plate-like material) or a knife mark is attached.
[0005]
Moreover, the apparatus described in the literature 2 is necessary as a material for the elastic roll from synthetic rubber such as urethane rubber, butadiene-styrene rubber, butyl rubber, nitrile rubber, chlorobrene rubber, silicon rubber, fluorine rubber, and various elastomers. It is appropriately selected in consideration of elasticity and resistance. Generally, a material having a hard or medium hardness material is used as the material of the elastic roll. For this reason , when the belt-like member is sandwiched between the outer peripheral surface of the round blade and the outer peripheral surface of the elastic ring, if it is sandwiched in a pressurized manner, a knife mark is attached. A space is created, and the strip member is not stable. Accordingly, it is necessary to pay considerable attention to dimensional management of the elastic roll in relation to the amount of overlap between the upper and lower blades (overlap amount) and the outer diameter accuracy of the elastic ring.
Accordingly , the present invention solves the above-described problems, and can accurately cut the original fabric without causing quality deterioration such as occurrence of flare near the cut edge of the electrode element or attachment of a knife mark. It is an object of the present invention to provide an original fabric cutting device and a strip cutting device for electrodes.
[0006]
[Means for Solving the Problems]
The present invention is a cutting device for cutting an original fabric for battery electrodes, and is provided with a step portion comprising a large-diameter ring portion and a small-diameter ring portion at both ends of the outer peripheral portion, and is fitted to the small-diameter ring portion. and a first round blade, and a disc spring for biasing the mated the first round blade on the smaller diameter ring portion in the axial direction located between the first round blade and the large-diameter ring portion a blade holder with a first ring-shaped stepped portion for mounting the first elastic ring is provided on at least one side edge of the outer peripheral portion side end, the first elastic ring mounted on the first ring Jodan portion a first spacer that is, a first rotary shaft which said edge holder a predetermined number and a predetermined number of said first spacer is mounted alternately and continuously, between two second circular blade A first round blade block with an intermediate spacer on the front and a second elastic ring on at least both ends of the outer periphery. The second ring-shaped stepped portion is provided, the second spacer a second elastic ring is attached to the second ring Jodan portion, a second round blade that is adjacent an end spacer in the second round blade that A block, a predetermined number of the first round blade blocks, and a predetermined number of the second spacers are alternately and continuously mounted, and the second round blade block is mounted adjacent to both side ends thereof. consists of a second rotary shaft, the width of the blade holder and the first spacer and the first round blade block and the second spacer are substantially cutting width, respectively, said mounted on said first rotary shaft and the first round blade block that is mounted on the tool holder and the second above is mounted on the second spacer and the first rotating shaft mounted on the rotary shaft first spacer and the second rotary shaft Are center planes in the axial direction. Te is arranged so faced each other to, the outer diameter of the first elastic ring and said second elastic ring is greater than the outer diameter of said first circular blade and the second round blade.
[0007]
In the present invention, when the first rotating shaft and the second rotating shaft rotate, the second elastic ring that is opposed to the first round blade overlaps with the first round blade at the outer periphery of the first round blade. Along the first round blade. The band-shaped member cut from the original fabric by the first round blade and the second round blade advances while being sandwiched between the first round blade and the second elastic ring, and the side surface of the adjacent second round blade. It is pinched | interposed between the 1st round blade and the 2nd elastic ring until it passes the range pinched | interposed into. Therefore, the belt-shaped member cut from the original fabric can escape from between both side surfaces of the two second round blades without causing a undulation phenomenon. As a result, the cut strip-shaped member does not cause flare or a knife mark. Similarly, flare is not generated and a knife mark is not attached to the belt-like member sandwiched between the second round blade and the second elastic ring.
[0008]
Further, the present invention is a strip- shaped body cutting device for forming a plurality of narrow strip-shaped members through the strip-shaped body , and a stepped portion comprising a large-diameter ring portion and a small-diameter ring portion is provided at both ends of the outer peripheral portion. is a first round blade that is fitted to the small-diameter ring portion, a fitted the first round blade on the smaller diameter ring portion located between the first round blade and the large-diameter ring portion axis a blade holder with a disc spring for biasing the center direction, the first ring-shaped stepped portion for mounting the first elastic ring is provided on at least one side edge of the outer peripheral portion side end, said first ring a first spacer first elastic ring is attached to the Jodan portion, a first rotary shaft which said edge holder a predetermined number and a predetermined number of said first spacer is mounted alternately and continuously A first round blade block in which an intermediate spacer is provided between two second round blades; Both the second ring-shaped stepped portion is provided for mounting the second elastic ring on an outer peripheral portion side end, and a second spacer second elastic ring to said second ring Jodan portion is mounted, the second round blade A second round blade block having end spacers adjacent to each other, a predetermined number of the first round blade blocks, and a predetermined number of the second spacers are alternately and continuously mounted on both side ends thereof. 2 round blade block consists of a second rotary shaft which is mounted adjacent the width of the blade holder and the first spacer and the first round blade block and the second spacer are substantially cutting width respectively the blade holder and the second above is mounted on the second spacer and the first rotating shaft mounted on the rotary shaft first spacer and the second rotary shaft that is mounted in the first rotary shaft the first round blade block mounted on the There are disposed to faced each other as the same surface center plane in the axial direction, respectively, the outer diameter of the first elastic ring and the outer diameter of said first circular blade and the second round blade of the second elastic ring It is larger.
[0009]
In the present invention, when the first rotating shaft and the second rotating shaft rotate, the second elastic ring that is opposed to the first round blade overlaps with the first round blade at the outer periphery of the first round blade. Along the first round blade. The band-shaped member cut from the band-shaped body by the first round blade and the second round blade advances while being sandwiched between the first round blade and the second elastic ring, and the side surface of the adjacent second round blade. It is pinched | interposed between the 1st round blade and the 2nd elastic ring until it passes the range pinched | interposed into. Therefore, the belt-shaped member cut from the original fabric can escape from between both side surfaces of the second round blade without any undulation phenomenon. As a result, the cut strip-shaped member does not cause flare or a knife mark. Similarly, flare is not generated and a knife mark is not attached to the belt-like member sandwiched between the second round blade and the second elastic ring .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. The embodiment described below is a preferred specific example of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these forms.
FIG. 1 shows an original fabric cutting device for battery electrodes to which the present invention is applied . FIG. 6 is a perspective view showing an example of a state in which the original fabric T of the lithium ion secondary battery is cut into a plurality of strip-like members W by the cutting device 400. In FIG. 6, the original fabric T is unwound from the roll 222 of the unwinding part A, and is cut by a cutting device (also referred to as a slit device or a slitter) 400, whereby a plurality of strip-shaped members W are obtained. The roll 222 unwinds the original fabric T by the operation of the motor 224, and the plurality of strip-shaped members W after cutting can be wound by the winding reel 242 of the winding section C. The take-up reel 242 is rotated by the motor 240. Each belt-like member W is cut with a width D , for example . Cutting device 400 includes a rotating member 200 and the rotating body 300, the rotating body 200 and the rotor 300 is rotated in opposite directions by the drive unit 100.
An original fabric T shown in FIG. 6 is an original fabric for making a positive electrode and a negative electrode of a lithium ion secondary battery. In the lithium ion secondary battery, an electrode element is formed by overlapping a belt-like positive electrode, a belt-like separator, a belt-like negative electrode, and a separator, for example, in a spiral shape. Such electrode elements made in can make a lithium ion secondary battery by placing encapsulated electrolyte placed in a can.
[0011]
The strip member W obtained by cutting the raw fabric T is used as a positive electrode or a negative electrode as described above.
The structure of the positive electrode is configured as follows , for example . The current collector is mainly formed by mixing LiCoO ₂ powder with a binder on both sides or one side of a smooth aluminum foil of about 10 to 30 μm or a net-like or expanded metal-like thin plate such as expanded metal. It is. On the other hand, the negative electrode is configured as follows, for example . Current collector of the negative electrode, on either side or both sides of the mainly smoothing Naru copper foil 10 to 30 [mu] m, the graphite is formed by coating as a mixture with binder and carbon. This current collector is the same as the positive electrode current collector, and a net-like or punching metal-like material is used. Such a positive electrode or negative electrode is formed by pressing the positive electrode material or the negative electrode material against the current collector, or by sintering, in addition to applying the positive electrode material or the negative electrode material to the current collector, respectively. Materials can also be adopted.
[0012]
Next , the cutting device 400 shown in FIG. 6 will be described in detail with reference to FIG. FIG. 1 shows a rotating body 200 and a rotating body 300 of the cutting device 400. First, the rotating body 200 will be described.
In FIG. 1, a plurality of blade holders 6 and a plurality of spacers (corresponding to first spacers) 8 are alternately and continuously mounted on the mounting shaft portion 1 a of the first rotating shaft 1. Spacers (corresponding to first spacers) 11 are further mounted on both side ends of the mounting shaft portion 1a. The flange portion 1b is provided in the vicinity of one end portion of the mounting shaft portion 1a and serves as a stopper. The fastening means 1c is provided in the vicinity of the other end of the mounting shaft portion 1a.
[0013]
The axis of the blade holder 6 coincides with the axis of the rotary shaft 1. At both end portions on the outer peripheral side of the blade holder 6, a step portion 6 c composed of a large diameter ring portion 6 a and a small diameter ring portion 6 b is formed. That is, the step portion 6c is configured by a portion from the large diameter ring portion 6a to the small diameter ring portion 6b.
A round blade (corresponding to a first round blade) 3 and a disc spring 5 are arranged on the outer peripheral portion of the small diameter ring portion 6b constituting the step portion 6c . The disc spring 5 is disposed between the round blade 3 and the large-diameter ring portion 6 a of the blade holder 6 and biases the round blade 3 in a direction parallel to the axis of the rotary shaft 1 .
[0014]
As shown in FIG. 2, the spacer (corresponding to the first spacer) 8 has the same diameter as the blade holder 6. As shown in FIG. 1, the spacer 8 is provided with ring-shaped step portions (corresponding to the first ring-shaped step portion) 8a at both ends in the axial direction of the outer peripheral portion. The ring-shaped step portion 8a is a portion to which an elastic ring (corresponding to a first elastic ring) 10 is attached. A ring-shaped step portion (corresponding to the first ring-shaped step portion) 11 a is also provided on one side end of the outer peripheral portion of the spacer (corresponding to the first spacer) 11 having a predetermined outer diameter. The ring-shaped step portion 11a is a portion on which the elastic ring 10 is mounted in the same manner as the ring-shaped step portion 8a.
[0015]
The elastic ring 10 is mounted on the ring-shaped step 8a of the spacer 8 and the ring-shaped step 11a of the spacer 11 as described above. This elastic ring 10 is made of a very soft foam rubber material, For example, a sponge is used . This foamed rubber material is extremely soft with a rubber hardness of about 5 to 30 degrees.
The outer diameter D2 of the elastic ring 10 is set larger than the outer diameter D1 of the round blade 3 by a predetermined dimension, as shown in FIG. The thickness of the elastic ring 10 is such that no gap is generated between the side surfaces of the adjacent round blades 3 and the side surfaces of the ring-shaped step portions 8 a and 11 a of the spacer 8 or the spacer 11.
[0016]
Next, the rotating body 300 of the cutting device 400 of FIG. 1 will be described.
A round blade block (corresponding to the first round blade block) 40 and a spacer (corresponding to the second spacer) 9 are alternately arranged on the mounting shaft portion 2a of the rotational shaft (corresponding to the second rotational shaft) 2 of the rotating body 300. It is worn continuously. The round blade block 40 includes round blades (corresponding to second round blades) 4 and 4. An intermediate spacer 7 is disposed between the round blades 4 and 4. End spacers 12 are mounted on both side ends of the mounting shaft portion 2a. The end spacer 12 and one round blade 4 constitute a round blade block (corresponding to a second round blade block) 41.
[0017]
The flange portion 2b is provided in the vicinity of one end portion of the mounting shaft portion 2a and serves as a stopper. The fastening means 2c is provided in the vicinity of the other end of the mounting shaft portion 2a, and the round blade block 41 and the like are fixed thereto. The outer diameters of the round blade 4, the intermediate spacer 7, the spacer 9, and the end spacer 12 are set to the same outer diameter D3 as shown in FIG.
Similar to the spacer 8, the spacer 9 is provided with a ring-shaped step (corresponding to a second ring-shaped step) 9 a. This ring-shaped step portion 9a is a portion to which an elastic ring (corresponding to a second elastic ring) 13 is attached. The elastic ring 13 attached to the ring-shaped step portion 9a is made of a foam rubber material having a rubber hardness of about 5 to 30 degrees , for example, sponge. As shown in FIG. 3, the outer diameter D4 of the elastic ring 13 is set larger than the outer diameter D3 of the round blade 4 by a predetermined dimension.
[0018]
As an example, as shown by a region H in FIG. 1, each of the blade holder 6 and the spacer 8 mounted on the first rotating shaft 1, and the round blade block 40 and the spacer 9 mounted on the second rotating shaft 2. The length in the axial direction is set to a width D (see FIG. 6) that is substantially slit.
Actually, the width of the blade holder 6 is slightly increased, and the width of the spacer 8 is decreased accordingly. The blade holder 6 mounted on the first rotating shaft 1, the spacer 9 mounted on the second rotating shaft 2, and the spacer 8 mounted on the first rotating shaft 1 and the second rotating shaft 2 are mounted. The round blade blocks 40 are arranged so as to face each other vertically with the central plane in the axial direction as the same plane. Moreover , the cutting edge of the round blade 4 and the cutting edge of the round blade 3 are a predetermined amount so that the side surface of the round blade 3 is pressed against the side surface of the round blade 4 with a predetermined force by the biasing force of the disc spring 5. In FIG. 1, it overlaps with the up-down direction (direction orthogonal to the rotating shafts 1 and 2).
[0019]
In any case, the outer diameter D2 of the elastic ring 10 and the outer diameter D4 of the elastic ring 13 are set larger than the outer diameter D1 of the round blade 3 and the outer diameter D3 of the round blade 4 by a predetermined value. The elastic ring 10 and the elastic ring 13 are made of a foamed rubber material having a rubber hardness of about 5 to 30 degrees. The outer diameters D2 and D4 of the elastic rings 10 and 13 are set to be larger than the outer diameters D1 and D3 of the round blades 3 and 4 by a predetermined value. In the range until the cut end face of W is released from the side surface of the round blade 3 or the round blade 4, the outer peripheral surface of the round blade 3 and the round blade 4 and the outer peripheral surface of the elastic rings 10 and 13 It is a value which becomes an outer diameter sufficient for the contact.
[0020]
Next, an operation example of the above-described cutting apparatus will be described.
As shown in FIG. 6, the original fabric T for making an electrode for a lithium ion secondary battery is unwound from the roll 222 of the unwinding portion A and passes between the rotating bodies 200 and 300 of the cutting device 400. At this time , the raw fabric T is cut into a plurality of strip-shaped members W and wound on the take-up reel 242. As shown in FIG. 4, the elastic ring 13 facing the round blade 3 up and down is made of a soft material such as sponge, so the portion that wraps up and down with the round blade 3 follows the outer periphery of the round blade 3. In close contact with the round blade 3.
[0021]
On the other hand, the band-shaped member W cut at the cutting point X by the round blade 3 and the round blade 4 advances in the FW direction while being sandwiched between the round blade 3 and the elastic ring 13. And since the strip | belt-shaped member W is pinched | interposed between the round blade 3 and the elastic ring 13 , until the range pinched | interposed between the side surfaces of the two round blades 4 and 4 passes, Without undulating phenomenon, it is possible to escape from between both side surfaces of the two round blades 4 and 4 and to wind up on the take-up reel 242 of the take-up portion C shown in FIG. As a result, flare is not generated in each band-like member W and knife marks are not attached. Similarly, no flare or knife mark is generated in the band-shaped member W sandwiched between the round blade 4 and the elastic ring 10.
[0022]
Thus, the cutting device according to the present invention, when making a cathode and anode is an electrode of a lithium ion secondary battery, and cut into strips W in plural rows. In this case, even when the raw material made of a material that easily undergoes plastic deformation is cut into a plurality of strips, a undulation phenomenon occurs in the vicinity of the sheared cut of the cut strip-shaped member W or a knife mark is attached. The belt-like member W can be slit (cut) with high accuracy without causing a problem of quality degradation.
In addition, since there is no such thing as waste in the middle unplug the cut is made worse part as in the prior art, it is possible to improve the yield of making the belt-like member W of multiple Article by utilizing the raw.
By applying foamed rubber-based material, such as sponge, to the elastic rings 10 and 13, an air pocket is formed between the raw fabric and the blade or the spacer, and the band-shaped object to be cut is formed without being in close contact with each other. It will discharge the member W smoothly.
[0023]
Figure 5 shows another example of a cutting apparatus according to the present invention.
5 differs from the apparatus shown in FIG. 1 in the shape of the elastic ring 110 provided in the spacer 8 and the configuration of the elastic ring provided in the spacer 9. In the spacer 8 of FIG. 5, the ring-shaped step portion 8 a is formed along the entire axial length (full width) of the spacer 8, and the elastic ring 110 is attached to the ring-shaped step portion 8 a. . Similarly, a ring-shaped step portion 9a is also formed in the spacer 9 along its entire length in the axial direction (full width). An elastic ring 113 is attached to the ring-shaped step 9a along the entire length in the axial direction. By comprising in this way, the number of parts of the elastic ring with which a ring-shaped step part is mounted can be reduced.
[0024]
By the way, the present invention is not limited to the above example . For example, in addition to using the cutting device of the present invention to form an electrode of a lithium ion secondary battery, the cutting device of the present invention can be made of, for example, a metal foil such as an aluminum foil or a copper foil, or a foreign material on the metal foil. The present invention can be applied to a case where a coated or coated composite material, in particular, a belt-like body having a property of being easily plastically deformed and causing flare and knife marks in the vicinity of the cut during slitting, is slit into a plurality of strip-like members.
[0025]
【The invention's effect】
As described above, according to the present invention, the raw fabric can be cut (slit) with high accuracy without causing quality deterioration such as flare in the vicinity of the cut surface of the electrode element or a knife mark. Can do.
[Brief description of the drawings]
1 is a side view showing a cutting device according to the present invention.
[2] the elastic ring of the rotating body shown in FIG. 1, the spacer is a partial cross-sectional view illustrating the relationship between the amplitudes of round blade.
[3] The spacer of the rotating body shown in FIG. 1, the round blade, a side sectional view showing a size relationship such as an elastic ring.
FIG. 4 is a front view showing a state in which a belt-like member is cut (slit) from the original fabric.
5 is a side view showing another example of a cutting apparatus according to the present invention.
It is a perspective view showing a state of cutting the belt-shaped member by a cutting apparatus according to the present invention; FIG.
[Explanation of symbols]
1 rotary shaft (first rotary shaft), 2 rotary shaft (second rotary shaft), 3 round blade (first round blade), 4 round blade (second round blade), 5 disc spring (biasing means), 6 Blade holder, 6a Large-diameter ring portion, 6b Small-diameter ring portion, 6c Stepped portion, 7 Spacer, 8, 11 Spacer (first spacer), 9 Spacer (second spacer), 9a Ring-shaped step (second ring-shaped step) Part), 11a ring-shaped step part (first ring-shaped step part), 10 elastic ring (first elastic ring), 13 elastic ring (second elastic ring), 40 round blade block (first round blade block), 41 Round blade block (second round blade block)

Claims (7)

A cutting device for cutting the raw material for the electrode of the battery,
The outer peripheral portion stepped portion formed of a large-diameter ring portion and a small-diameter ring portion to the side end portion is provided, a first round blade that is fitted to the small-diameter ring portion, and the first round blade and the large-diameter ring portion A blade holder provided with a disc spring which is positioned between and fitted to the small-diameter ring portion and biases the first round blade in the axial direction;
The first ring-like step portion for mounting the first elastic ring on at least one side edge of the outer peripheral portion side end is provided, the first elastic ring to the first ring Jodan portion is attached first spacer When,
A first rotary shaft and a predetermined number of said edge holders and a predetermined number of said first spacer is mounted in an alternating sequence,
A first round blade block provided with an intermediate spacer between two second round blades;
The second ring-shaped stepped portion is provided for mounting the at least second elastic ring on an outer peripheral portion side end, and a second spacer said second elastic ring to the second ring Jodan portion is attached,
A second round blade blocks are adjacent the end spacer in the second round blade,
A second rotation in which a predetermined number of the first round blade blocks and a predetermined number of the second spacers are mounted alternately and continuously, and the second round blade blocks are mounted adjacent to both side ends thereof. The axis,
Width between said edge holder and the first spacer and the first round blade block and the second spacer are substantially cutting width, respectively,
The said edge holder and the second above is mounted on the second spacer and the first rotating shaft mounted on the rotary shaft first spacer and the second rotary shaft that is mounted in the first rotary shaft and the first round blade block that is mounted is disposed so as to faced each other as the same surface center plane in the axial direction, respectively,
Raw cutting device for battery electrodes, characterized in that the outer diameter of the first elastic ring and said second elastic ring is greater than the outer diameter of said first circular blade and the second round blade . The outer diameter of the first elastic ring and the second resilient ring, the above than the outer diameter of the first round blade and the second circular blade, cut end surface of at least the belt-shaped member is the first round blade or the in the range until it is released from the side surface of the second circular blade, as described above the outer peripheral surface and the outer circumferential surface of the first resilient ring and the second resilient ring of the first round blade and the second round blade is in close contact 2. The raw fabric cutting device for a battery electrode according to claim 1, which is enlarged. Said first ring-shaped stepped portion and the second ring Jodan portion is formed respectively over the entire axial length of the first spacer and the second spacer, said first ring-shaped stepped portion and the second ring along the stepped portion raw cutting device for battery electrodes according to claim 1, wherein said first resilient ring and the second resilient ring is mounted. 2. The device for cutting an original fabric for battery electrodes according to claim 1, which is used for cutting a strip-shaped member from an original fabric for electrodes of a lithium ion secondary battery. The first round blade and the said first resilient ring and the second resilient ring adjacent the second round blade is claims rubber hardness is formed by 5 to 30 degrees of the foamed rubber material Item 1. A raw material cutting device for battery electrodes according to Item 1. A strip- shaped body cutting device for forming a plurality of narrow strip-shaped members through the strip-shaped body ,
The outer peripheral portion stepped portion formed of a large-diameter ring portion and a small-diameter ring portion to the side end portion is provided, a first round blade that is fitted to the small-diameter ring portion, and the first round blade and the large-diameter ring portion A blade holder provided with a disc spring which is positioned between and fitted to the small-diameter ring portion and biases the first round blade in the axial direction;
The first ring-like step portion for mounting the first elastic ring on at least one side edge of the outer peripheral portion side end is provided, the first elastic ring to the first ring Jodan portion is attached first spacer When,
A first rotary shaft and a predetermined number of said edge holders and a predetermined number of said first spacer is mounted in an alternating sequence,
A first round blade block provided with an intermediate spacer between two second round blades;
The second ring-shaped stepped portion is provided for mounting the at least second elastic ring on an outer peripheral portion side end, and a second spacer said second elastic ring to the second ring Jodan portion is attached,
A second round blade blocks are adjacent the end spacer in the second round blade,
A second rotation in which a predetermined number of the first round blade blocks and a predetermined number of the second spacers are mounted alternately and continuously, and the second round blade blocks are mounted adjacent to both side ends thereof. The axis,
Width between said edge holder and the first spacer and the first round blade block and the second spacer are substantially cutting width, respectively,
The said edge holder and the second above is mounted on the second spacer and the first rotating shaft mounted on the rotary shaft first spacer and the second rotary shaft that is mounted in the first rotary shaft and the first round blade block that is mounted is disposed so as to faced each other as the same surface center plane in the axial direction, respectively,
Cutting apparatus of the strip, characterized in that the outer diameter of the first elastic ring and said second elastic ring is greater than the outer diameter of said first circular blade and the second round blade. The first round blade and the said first resilient ring and the second resilient ring adjacent the second round blade is claims rubber hardness is formed by 5 to 30 degrees of the foamed rubber material Item 7. A strip cutting device according to Item 6.

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