JP3717041B2 - Cutting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cutting device for slitting a long wide sheet-like material such as a laminated sheet such as a synthetic resin film, a foil, and a battery electrode into a predetermined narrow sheet-like material.
[0002]
[Prior art]
In general, when slitting a wide sheet material such as a laminated sheet such as a synthetic resin film, a foil, a battery electrode in which a synthetic resin or the like is applied on one or both sides of the foil into a predetermined narrow sheet material, For example, the first and second rotating shafts arranged in parallel to each other as described in Japanese Patent Publication No. 7-24225 are provided, and a blade is formed on the outer peripheral side edge of the first rotating shaft. The lower blade is fixed at the interval of the slit width by the spacer, and the upper blade holder is fixed at the interval of the slit width by the spacer on the second rotating shaft, and a gang slit type cutting device or Japanese Patent Publication No. 1-20039 When loosely mounting a donut-shaped plate-shaped slitter upper blade with a cutting edge on the periphery as described, it is attached to the mounting jig that is rotatably supported. Same as jig An annular coil spring is inserted and inserted between the conical surface of the slit and the slitter upper blade plate-like concave side surface on the opposite side is concentrically and detachably attached to a small diameter portion continuous to the conical surface of the mounting jig. It is supported by the outer periphery of the stop ring that is inserted into the slit, and the slit upper blade is fixed to the mounting jig so that it is self-aligning and can be slightly displaced in the axial direction, forming a clearance angle. A ring-shaped slitter lower blade with a concave portion is fixed concentrically to the cut sheet conveying roller, and a cutting device configured to contact and engage the slit upper blade and the slitter lower blade at two points is used. Has been.
[0003]
In the case of a gang slit type cutting device such as the above-mentioned, in the case of a laminated sheet-like material such as a battery electrode in which synthetic resin or the like is applied on both sides, the cutting edge angle is relative to the laminated sheet-like material to be cut. Since the shearing force is applied by the 90-degree blade, the shearing force is not concentrated on the shearing line to be sheared, and the inner layer foil 70a breaks due to the internal pulling force acting on one sheet. The sheet 70 has a problem that the foil 70a protrudes from the synthetic resin 70b in a tongue shape or a needle shape, and the other sheet-like object 70 is in a state in which the foil 70a is retracted (FIG. 10).
[0004]
Further, in the latter cutting apparatus, the cut sheet-like material is brought into contact with the side surface of the plate-like convex portion of the slitter upper blade to bend the foil 70a and cause the cut end surface portion to be deformed (FIG. 11). There is a problem of becoming.
[0005]
Therefore, the first blade shaft 40 mounted on the shaft 42 so that the blades 43, the spacers 44, and the rubber rollers 45 are alternately positioned so that a plurality of annular blades 43 as shown in FIG. And the second blade 48 mounted on the shaft 47 so that the blades 48, the spacers 49, and the rubber rollers 50 are alternately positioned so that the plurality of annular blades 48 can come into contact with the respective blades 43 of the first blade shaft 40. A cutting apparatus having a blade shaft 41 and having a blade edge angle of one blade 48 of the blades 43 and 48 of the first blade shaft 40 and the second blade shaft 41 has been developed.
[0006]
[Problem to be Solved by the Invention]
However, when the cutting edge angle of the blade 48 is set to an acute angle, a sheet-like material cut by generating a large space in the inclined surface portion as shown in FIG. 9 is pressed by the acute angle blade portion, and along the inclined surface of the acute blade. There is a problem that it is greatly bent and deformed.
[0007]
In addition, when a sheet-like material as shown in FIG. 12 is nipped by a rubber roller, if there is a depression in the inclined surface portion of the blade, the vicinity of the cut portion of the sheet-like material is bent in a state along the space of the blade. There is a problem of taking damage.
[0008]
Further, when a sit-like material having a synthetic resin coated on both sides of an extremely thin copper foil such as an electrode plate of a lithium ion battery is cut with a blade having an acute angle blade, the sheet shape is cut when the blade edge is cut into the sheet-like material. There is a problem that an ultrathin copper foil is torn due to a pulling force acting on an object.
[0009]
An object of this invention is to provide the cutting device which can cut | disconnect in a substantially right angle state, without a protrusion part and a retracting part being produced in the cutting part of a sheet-like thing, or a cutting | disconnection part bending and deform | transforming.
[0010]
[Means for Solving the Problems]
Cutting apparatus of the present invention is provided with a cover member was allowed formed by spacers or annular cover is projected only blade edge sharp blade at an acute angle inclined surface of the cutter as described in claim 1 in order to attain the above object of the The cover member covers the acutely inclined surface portion of the blade .
[0011]
The configuration cutting apparatus of the present invention which is pressed first blade shaft and at least one blade of the blade of the second blade axis by an elastic member as described in claim 2, as claimed in claim 3 Of the spacers on the first blade shaft and the second blade shaft, one of the opposing spacers can be a rubber roller having an outer peripheral portion mounted with an elastic body .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic sectional view showing an embodiment of the configuration of the cutting apparatus of the present invention, FIG. 2 is a schematic enlarged view showing a cutting state of a sheet-like material in the cutting apparatus of FIG. The fixed-side first blade shaft 1 is rotatably mounted by a bearing on the first blade shaft 1 and the distance between the axes can be adjusted with respect to the first blade shaft 1 and is rotatably mounted on the machine frame by the bearing. The second blade shaft 2 is configured.
[0013]
The first blade shaft 1 described above includes a first rubber roller 4 for forming a gap having a width dimension substantially equal to the width dimension (W) of the sheet-like material to be cut, an annular blade 6, an annular spacer 5, and an annular shape. The blades 7 are sequentially inserted into the shaft body 3, and the collars 8 are inserted into both end portions thereof, and are tightened from both sides by a washer 9 and a nut 10 to be formed into a single body. In this case, the first rubber roller 4 and the spacer 5 are fitted and inserted so that the first rubber roller 4 and the spacer 5 are alternately positioned inside the collar 8 according to the number of cut points.
[0014]
The first rubber roller 4 is a boss 11 that is inserted into the shaft body 3, and a synthetic rubber such as urethane rubber, butyl rubber, or silicon rubber that is baked to the outer peripheral portion thereof to a thickness of 1 to 20 mm, and is integrated by bonding, welding, or the like. It is comprised by the rubber body 12 which consists of. The thickness dimension of the rubber body 12 is appropriately set according to the outer diameter dimension of the shaft body 3, the outer diameter dimensions of the blades 6 and 7, the rubber hardness, and the like.
[0015]
The spacer 5 has a width dimension (Wa) obtained by subtracting the thickness dimension (T) of the cutters 6 and 7 from the width dimension (W) of the first rubber roller 4, and the outer diameter dimension is outside the cutters 6 and 7. It is preferable to set it equal to the diameter dimension.
[0016]
The spacer 5 can be formed of hard synthetic resin such as stainless steel, vinyl chloride resin, polyamide resin, or the like, or can be formed of the boss 11 and the rubber body 12 in the same manner as the first rubber roller 4.
[0017]
The second blade shaft 2 includes an annular pressing spacer 14, an annular cover 15 that covers the inclined portion of the blade, an annular blade 16 having a sharply inclined surface, and a second rubber roller 17 for forming a gap. The annular blade 18 having an inclined surface with a sharp edge, the annular cover 19 covering the inclined portion of the blade, and the annular pressing spacer 20 are sequentially fitted and inserted into the shaft body 13, and the collar 21 is inserted from both ends thereof. It is inserted into a single piece by tightening from both sides with a washer 22 and a nut 23. In this case, on the inner side of the collar 21, the blade 16, the pressing spacer 14, and the blade 18 are disposed on the fixed blade axis 1 facing the first rubber roller 4, and the second rubber roller 17 is disposed on the portion facing the spacer 5 and the blades 6 and 7. Insert so that is located.
[0018]
Similar to the first rubber roller 4, the second rubber roller 17 is constituted by a boss 24 and a rubber body 25.
[0019]
The width of the outer peripheral side of the pressing spacer 20 can be moved between the thickness of the blades 16 and 18 and the thickness of the annular covers 15 and 19 so that the blades 16 and 18 can move smoothly in the axial direction. The thickness dimension is obtained by subtracting the gap dimension.
[0020]
Recessed annular grooves 14a and 20a are formed on one side of the pressing spacer 14 and on both side surfaces of the pressing spacer 20, and the blades 16 and 18 are placed on the side surfaces of the blades 6 and 7 of the first blade shaft 1 in a predetermined manner. An elastic body 26 such as a disc spring or a synthetic rubber ring for contact with the surface pressure is attached.
[0021]
The rubber part of the second rubber roller 17 has substantially the same width (W) as the first rubber roller 4.
[0022]
The rubber bodies 12 and 25 set the thickness dimension according to the outer diameter dimension of the shaft body 3, the outer diameter dimension of the blades 6 and 7, the rubber hardness, etc. within the range of 1 to 20 mm, and the outer diameter dimension (D1) is It sets so that it may become equal to the outer diameter dimension (D) of the spacers 5 and 14 for a press.
[0023]
When tightening the nuts 10 and 23 described above, it is preferable to provide a locking member such as a disc spring. Further, it is possible to omit the collars 8 and 21 by forming the washers 9 and 22 and the collars 8 and 21 integrally.
[0024]
The first blade shaft 1 and the second blade shaft 2 described above are rotated in a reverse direction at a predetermined speed by a driving device (not shown).
[0025]
The above-described blades 16 and 18 are formed with inclined surfaces 16a and 18a (acute angle blade portions) whose outer peripheral tips have an inclination angle (θ) of 25 to 60 degrees.
[0026]
When the inclination angle (θ) is sharper than 25 degrees, the cutting edge itself is insufficiently rigid and the cutting edge is broken or chipped. When the angle is 60 degrees or more, the same problem as in the case of a conventional 90-degree blade occurs. Therefore, it is desirable to set the inclination angle (θ) within a range of 25 degrees to 60 degrees.
[0027]
Further, the thickness of the blades 16 and 18 is limited in the thickness of the blade plate material that can be easily obtained, and when the thickness of the blade is increased, the cover of the annular covers 15 and 19 covering the inclined surface portion of the blade edge of the blade is covered. In order to prevent the annular covers 15 and 19 from being deformed by the pressing force of the first rubber roller 4 or the like, the thickness dimensions of the annular covers 15 and 19 must be increased. There is a limitation that the thickness dimension of the spacer 20 for use is reduced accordingly. Therefore, it was found that the upper limit of the thickness dimension of the blades 16 and 18 is 2.0 mm. On the other hand, if the thickness dimension is 0.2 mm or less, it becomes impossible to obtain the required rigidity and strength.
[0028]
For these reasons, it is necessary to set the thickness dimension of the cutters 16 and 18 between 0.2 mm and 2.0 mm, and it is preferable to use those having a thickness of 1.0 mm to 2.0 mm.
[0029]
When the outer diameter dimension of the blades 16 and 18 is too larger than the outer diameter dimension of the spacer 15 (more than the thickness dimension of the sheet-like object to be cut), the sheet shape is cut in the same manner as in the latter case of the above-described prior art. A thing will bend.
[0030]
For these reasons, it is necessary to set the outer diameter of the blades 16 and 18 to be slightly larger than the outer diameter of the spacer (the range of the thickness of the sheet-like material to be cut).
[0031]
In the cutting part of the sheet-like object 70 in the above-described cutting apparatus, the shaft bodies 3 and 13 are machine frame so that the blades 6, 7, 16, and 18 are overlapped by a predetermined dimension as shown in FIG. Since it is attached (not shown), the sheet-like object 70 is pressed against the circumferential surfaces of the blades 6, 7, 16, 18 while the outer peripheral surfaces of the rubber bodies 12, 25 are in contact with each other.
[0032]
The annular covers 15 and 19 are set so that the outer diameter dimension [(Dk) mm] is smaller than the outer diameter dimension [(Dn) mm] of the cutters 16 and 18 by [(h) mm].
[0033]
h = t / 2 to t
t is a thickness dimension of the sheet-like material 70.
[0034]
When (h) becomes larger than the thickness (t) of the sheet-like material 70, the amount of deformation of the sheet-like material becomes large, and the wound product is in a high edge state. On the other hand, if (h) is too small, the effect of the cutting edge is lost and a cutting product similar to a rectangular blade is obtained.
[0035]
The inclined surfaces 15b and 19b of the cover portions 15a and 19a for covering the inclined surfaces 16a and 18a of the blades 16 and 18 of the annular covers 15 and 19 have an angle larger than the angle of the inclined surfaces 16a and 18a of the blades 16 and 18. It is preferable to set so that
[0036]
If the angle of the inclined surfaces 15b and 19b is the same as or smaller than the angle of the inclined surfaces 16a and 18a of the cutters 16 and 18, an unnecessary force acts on the cutter or there is a large gap size when there is a machining error. Problem arises.
[0037]
Moreover, the space | interval dimension [(v) mm] of the inclined surfaces 16a and 18a of the cutters 16 and 18 is set to the following range.
[0038]
0 <v <t
When the distance dimension (v) is larger than the thickness (t) of the sheet-like material 70, the sheet-like material 70 enters the gap portion and causes the same phenomenon as in the conventional state where the gap is present. In the case of 0, an excessive force is generated on the blade.
[0039]
In this state, when the sheet-like object 70 is conveyed and the first blade shaft 1 on the fixed side and the second blade axis 2 on the movable side are rotated, the cutting edge may slightly cut the surface layer of the sheet-like object 70. The annular covers 15 and 19 function in the same manner as the pressing spacers 14 and 20 so that the sheet-like material 70 is pushed down in parallel, and the sheet-like material 70 does not bend and has a substantially right angle as shown in FIG. Disconnected to the state.
[0040]
The blades 16 and 18 and the annular covers 15 and 19 in the above-described cutting apparatus are configured such that the annular covers 15 and 19 cover portions 15a and 19a are integrally formed at the end of the pressing spacer 27 as shown in FIG. 3 without the elastic body 26 as shown in FIG. 4, a configuration in which the blades 16 and 18 are sandwiched between the spacer 28 and the second rubber roller 17 in the same manner as the first blade shaft 1, and a blade 29 as shown in FIG. An annular cover 30 is disposed on one side and a pressing plate 31 is disposed on the other side, and a unit is formed by bolts 32, and the unit can be mounted between the spacer 33 and the second rubber roller 17.
[0041]
In the cutting device of the present invention, the first blade shaft 1 can be configured such that the blade of the acute blade and the annular cover are mounted in the same manner as the second blade shaft 2.
[0042]
Further, the first rubber roller 4 and the second rubber roller 17 in FIG. 1 can be formed into rubber bodies 34 and 35 in which the central portion in the width direction of the circumferential portion as shown in FIG. 6 is formed in concave shapes 34b and 35b. The width dimension (E) of the contact portions 34a1, 34a2, 35a1, 35a2 and the depth dimension (F) of the concave portions 34b, 35b are the thickness, material, and blades 6, 7, 16, 18 of the sheet-like material to be cut. The outer diameter dimension, the width dimension, and the inter-axis distance between the first blade axis 1 and the second blade axis 2 are set.
[0043]
When the sheet-like material 70 is conveyed in such a state and the first blade shaft 1 on the fixed side and the second blade shaft 2 on the movable side are rotated, the concave portions 33b and 34b are formed in the circumferential portion. As in the case of the first rubber roller 4 and the second rubber roller 14 that are not present, the sheet-like material 70 can cut the blades 6, 7, 16, and 18 into a substantially perpendicular state as shown in FIG.
[0044]
【The invention's effect】
Cutting apparatus of the present invention is provided with a cover member was allowed formed by spacers or annular cover is projected only blade edge sharp blade at an acute angle inclined surface of the cutter as described in claim 1, of the blade at the cover member Since the sharp inclined surface is covered , the cutting edge of the blade is formed in a state where a protruding portion or a retracting portion is formed in the cutting portion of the sheet-like material or the cutting portion is bent without processing the blade edge portion in a complicated and high precision. Without cutting, it can be cut into a substantially right angle state.
[0045]
Further, when the cutting device according to the present invention is configured such that at least one of the blades of the first blade shaft and the second blade shaft is pressed by the elastic body, the blade position between the blade shafts is as described in claim 2. The error is automatically corrected and can be cut into a sheet having a predetermined width, and one of the spacers on the first blade shaft and the second blade shaft facing each other as described in claim 3. If the rubber roller having a shape in which an elastic body is attached to the outer peripheral portion, the sheet-like material is not displaced during cutting, and can be cut into a straight state.
[0046]
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing a first embodiment of the configuration of the cutting apparatus of the present invention.
2 is a schematic enlarged view showing a cutting state of a sheet-like object in the cutting apparatus of FIG.
FIG. 3 is a schematic enlarged view showing a second embodiment of the cutting part of the cutting apparatus of the present invention.
FIG. 4 is a schematic enlarged view showing a third embodiment of the cutting part of the cutting apparatus of the present invention.
FIG. 5 is a schematic enlarged view showing a fourth embodiment of the cutting part of the cutting apparatus of the present invention.
FIG. 6 is a schematic enlarged view showing a second embodiment of the configuration of the cutting apparatus of the present invention.
FIG. 7 is a schematic view showing a cut portion of a sheet-like material cut by the cutting device of the present invention.
FIG. 8 is a schematic view showing an embodiment of the configuration of a conventional cutting device.
FIG. 9 is a schematic view showing details of the cutting section of FIG. 8;
FIG.
FIG.
FIG. 12 is a schematic view showing a cut portion of a sheet-like material cut by a conventional cutting device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st blade axis | shaft 2 2nd blade axis | shaft 3, 13 Shaft body 4 1st rubber rollers 5, 28, 33 Spacer 6, 7, 16, 18, 29 Blade 11 and 24 Boss 12, 25, 34, 35 Rubber body 17 First 2 Rubber rollers 14, 20 Pressing spacers 15, 19, 30 Annular cover 21 Collar 22 Washer 23 Nut 26 Elastic body 31 Holding plate 32 Bolts 6 a, 7 a, 16 a, 18 a, 15 b, 19 b Inclined surfaces 15 a, 19 a Cover portions 34 b, 35 b Recess 34a1, 34a2, 35a1, 35a2 contact surface

Claims (3)

A first blade shaft mounted such that the blades and the spacers are alternately positioned so that the plurality of annular blades have a predetermined interval, and the plurality of annular blades are in contact with each blade of the first blade shaft And a second blade shaft mounted so that the cutter and the spacer are alternately positioned so that the blade edge angle of at least one of the blades of the first blade shaft and the second blade shaft is an acute angle. in the cutting apparatus was allowed, so that the blade edge of the sharp edge only is protruded a cover member that was allowed formed by spacers or annular cover at an acute angle inclined surface portion of the blade, covering the sharp slope portion of the blade at the cover member A cutting device characterized by that.   The cutting device according to claim 1, wherein at least one of the blades of the first blade shaft and the second blade shaft is pressed by an elastic body.   3. The rubber roller according to claim 1, wherein one of the opposed spacers of the first blade shaft and the second blade shaft is a rubber roller having a shape in which an elastic body is mounted on an outer peripheral portion. Cutting device.

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