JP2007000981A - Wide web cutter and wide web cutting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutter and a cutting method, having a rotary blade, at least a set of a disk-like upper blade and a drum-like lower blade, stabilizing the side pressure of a side pressure applying means to the disk-like upper blade over a long period of time, dispensing with complicated maintenance, and obtaining a stable cut width and a cut surface of stable high-quality. <P>SOLUTION: In this wide web cutter, a wide web is continuously cut into at least two narrow webs using the rotary blade including at least one set of the drum-like lower blade disposed on a lower blade shaft and the disk-like upper blade disposed on an upper blade shaft through an upper blade holder. The upper blade holder includes a disk-like upper blade fixing member, the side pressure applying means, and an upper blade shaft fixing member, the side pressure applying means is disposed in the state of abutting on an opposite surface to a crest surface of the disk-like upper blade in the disk-like upper blade fixing member and the crest surface of the disk-like upper blade, and the opposite surface is provided with the side pressure application stabilizing means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wide web cutting apparatus and a wide web cutting method for cutting a traveling wide web to a narrow width.

  Conventionally, adhesive tape for packaging, adhesive tape for insulation, etc. are prepared by applying adhesive on a wide and long support with different physical properties, such as paper, polyethylene, nylon, etc., drying, and then cutting to the specified width Has been. Photosensitive materials such as 135 film, photographic paper, X-ray film, and photothermographic material are wide and long supports having different physical properties such as triacetate cellulose (TAC), polyethylene terephthalate (PET), and polyethylene naphthalate (PEN). An undercoat coating solution, a photosensitive layer coating solution, and a protective layer coating solution are applied on the top, dried, and then cut into a specified width. In the present invention, the wide web is referred to as a wide web as a general term including those wide and long supports and various functional layers added to the wide and long supports. For the cutting of these wide webs, a so-called shear cut type cutter is generally used, in which two upper and lower rotary blades are brought into contact with each other and cut by meshing them.

  Conventionally, in the cutting of a wide web, the upper and lower blades of a shear-cut cutter rotate in a direction in which the upper blade and the lower blade are subordinately rotated with respect to the feeding direction of the wide web. The peripheral speed of the upper blade was slightly faster than the peripheral speed of the lower blade, and the peripheral speed of the lower blade was cut to be the same as the feeding speed of the wide web.

When cutting to a narrow web that requires a wide web by the shear cutting method, if the sharpness is poor, the cut surface will be crushed, or cutting powder will be generated during cutting and sticking to the product will occur Various studies have been made so far to avoid this problem. For example, with a cutting device equipped with multiple sets of rotating blades consisting of a lower blade and an upper blade, the contact pressure (side pressure) between the lower blade and the upper blade is disc spring to extend the blade life and cut with high precision A cutting device that cuts with high accuracy by adjusting the position by using (see, for example, Patent Document 1).
A cutting device with multiple sets of rotating blades consisting of lower blades and upper blades, and adjusting the lateral pressure between the lower blades and upper blades with a disc spring or coil spring, it achieves a sharp cutting edge and prolongs the blade life, resulting in high-quality cutting. Is known for a long time (see, for example, Patent Document 2).
However, the disc springs described in Patent Document 1 and Patent Document 2 have the following drawbacks. 1) Although the side pressure can be set with higher accuracy than the coil spring, it is difficult to design the disc spring itself, check the variation during manufacture, and manage the spring settling. 2) Since it has higher rigidity than a coil spring, the side pressure when using a conventional coil spring may not be suitable as a cutting condition. 3) When using disc springs, it is difficult to carry out a confirmation test for each disc spring to be used and to prepare the same physical properties. For these reasons, it is often difficult to switch from a coil spring to a disc spring in the case of an existing cutting machine that has already produced a wide variety of products.

  Further, in the coil spring described in Patent Document 2, in the cutting method, each time the upper blade rotates once, the coil spring reciprocates around the position of the coil spring contact of the disk-shaped upper blade fixing member of the upper blade holder by the offset distance of the upper and lower blades. For this reason, the vicinity of the coil spring contact position of the disk-shaped upper blade fixing member wears into a concave shape during long-time use. For this reason, the coil spring enters the portion worn by the concave mold, the movement of the coil spring becomes worse, and the side pressure to the upper blade increases. Moreover, the cutting powder at the time of cutting is clogged in the portion worn by the concave mold, and the movement of the coil spring is further deteriorated, and the side pressure to the upper blade becomes excessive. Including daily cleaning and management of the disk-shaped upper blade fixing member, it is difficult to stabilize the side pressure, and the cost for replacing the disk-shaped upper blade fixing member early, cutting powder, bad cutting, etc. This is one of the reasons why production efficiency cannot be increased.

From such a situation, the side pressure applying means has a rotary blade composed of at least one pair of upper and lower blades using a coil spring, the side pressure to the upper blade by the coil spring is stable for a long time, and no complicated maintenance management is required. Development of a wide web cutting device (hereinafter also simply referred to as a cutting device) and a wide web cutting method (hereinafter also simply referred to as a cutting method) capable of providing a clean cutting surface free from cutting powder, cuts, etc. Yes.
Japanese Utility Model Publication No. 5-56387 JP-A-10-217185

  The present invention has been made in view of the above situation, and has an object of having a rotary blade composed of at least one pair of a disk-shaped upper blade and a drum-shaped lower blade, and applying a disk-shaped upper blade by a lateral pressure applying means. The present invention provides a cutting apparatus and a cutting method in which the side pressure is stable for a long period of time, does not require complicated maintenance and management, and a high-quality cutting surface free from cutting powder and cutting damage is obtained.

  The above object of the present invention has been achieved by the following constitution.

(Claim 1)
A wide web that runs continuously is pressed against a drum-shaped lower blade having a piece portion and a blade portion disposed on a lower blade shaft, and a lateral pressure is applied to the drum-shaped lower blade in the axial direction by lateral pressure applying means. A rotary blade comprising at least one set having a blade edge opposed to each other at one or two positions of the blade portion and a disk-shaped upper blade disposed on the upper blade shaft via an upper blade holder In the wide web cutting apparatus for continuously cutting the wide web into at least two narrow webs along the running direction by embracing the drum-like lower blade,
The upper blade holder has a disk-shaped upper blade fixing member, a side pressure applying means, and an upper blade shaft fixing member,
The disk-shaped upper blade is disposed between the disk-shaped upper blade fixing member and the upper blade shaft fixing member,
The side pressure applying means is disposed in a state in which the disk-shaped upper blade fixing member is in contact with the surface of the disk-shaped upper blade opposite to the surface of the disk-shaped upper blade and the surface of the disk-shaped upper blade.
A wide web cutting apparatus characterized in that a side pressure application stabilizing means is provided on the facing surface.

(Claim 2)
2. The wide web cutting apparatus according to claim 1, wherein the lateral pressure application stabilizing means is a mirror-like linear surface provided on the opposing surface.

(Claim 3)
3. The wide web cutting apparatus according to claim 2, wherein the straight surface has a hard coat layer on the surface, and the hard coat layer is finished in a mirror shape.

(Claim 4)
2. The wide web cutting apparatus according to claim 1, wherein the lateral pressure applying and stabilizing means is an R-shaped surface provided on at least a part of the opposing surface.

(Claim 5)
5. The wide web cutting device according to claim 4, wherein the R-shaped surface is mirror-finished.

(Claim 6)
6. The wide web cutting apparatus according to claim 4, wherein a hard coat layer is provided on the opposing surface having the R-shaped surface.

(Claim 7)
7. The wide web cutting apparatus according to claim 6, wherein the hard coat layer is mirror-finished.

(Claim 8)
The wide web cutting apparatus according to any one of claims 1 to 7, wherein a hardness of a material of the disk-shaped upper blade fixing member is equal to or higher than a hardness of a material of the lateral pressure applying means. .

(Claim 9)
The wide web cutting apparatus according to any one of claims 1 to 8, wherein the side pressure applying means is a coil spring.

(Claim 10)
A wide web that runs continuously is pressed against a drum-shaped lower blade having a piece portion and a blade portion disposed on a lower blade shaft, and a lateral pressure is applied to the drum-shaped lower blade in the axial direction by lateral pressure applying means. A rotary blade comprising at least one set having a blade edge opposed to each other at one or two positions of the blade portion and a disk-shaped upper blade disposed on the upper blade shaft via an upper blade holder In the wide web cutting method, the wide web cutting apparatus is used to continuously cut the wide web into at least two narrow webs along the traveling direction by holding the drum-like lower blade. ,
The wide web cutting method according to any one of claims 1 to 9, wherein the wide web cutting device is the wide web cutting device.

  It has a rotary blade consisting of at least one pair of disk-shaped upper blade and drum-shaped lower blade, and the side pressure to the disk-shaped upper blade by the side pressure applying means is stable for a long period of time without requiring complicated maintenance management. It is possible to provide a cutting apparatus and a cutting method that can obtain a high-quality cutting surface with less generation of powder, cuts, and the like, and it is possible to improve production efficiency.

  Embodiments of the present invention will be described with reference to FIGS. 1 to 7, but the present invention is not limited thereto.

  FIG. 1 is a schematic view showing an example of a cutting method using a cutting device having a plurality of sets of disk-shaped upper blades and drum-shaped lower blades. FIG. 1A is a schematic perspective view showing an example of a cutting method using a cutting apparatus having a disk-shaped upper blade and a drum-shaped lower blade. FIG. 1B is a schematic partial cross-sectional view taken along the line AA ′ of FIG. In FIG. 1B, the wide web is omitted to show the arrangement of the upper and lower blades.

  In the figure, 1 indicates a cutting apparatus. 2 indicates an upper blade portion, 201a to 201g indicate disk-shaped upper blades, and 202 indicates an upper blade shaft to which the upper blades 201a to 201g are attached via an upper blade holder 203. The upper blade shaft 202 is rotatable. The number of upper blades 201a to 201g attached can be changed according to the width to be cut, and this figure shows the case of seven. The upper blades 201a to 201g to be attached all have the same shape, 201b1 indicates the mined surface of the disc-shaped upper blade 201b, and 201b2 indicates the anti-mineral surface. Similarly, the other upper blades have a shape having a mined surface and an anti-mineral surface.

  3 indicates a lower blade portion, 301 indicates a drum-shaped lower blade, and 302 indicates a lower blade shaft to which the drum-shaped lower blade 301 is attached. The lower blade shaft 302 is rotatable. 301a1 shows the blade part of the piece part 301a, 301a2 shows the part which does not have the blade part of the piece part 301a. 301b1 shows the blade part of the piece part 301b, 301b2 shows the part which does not have the blade part of the piece part 301ba. 301c1 shows the blade part of the piece part 301c, 301c2 shows the part which does not have the blade part of the piece part 301c. 301d1 shows the blade part of the piece part 301d, 301d2 shows the part which does not have the blade part of the piece part 301d. 301e1 shows the blade part of the piece part 301e, 301e2 shows the part which does not have the blade part of the piece part 301e. 301f1 shows the blade part of the piece part 301f, 301f2 shows the part which does not have the blade part of the piece part 301f. 301g1 shows the blade part of the piece part 301g, 301g2 shows the part which does not have the blade part of the piece part 301g. 301h2 shows the part which does not have the blade part of piece part 301h. The drum-like lower blade 301 shown in the figure has a configuration in which the direction of each blade portion of the piece portion is aligned in the same direction.

  Reference numeral 301b11 denotes a mined surface of the blade portion 301b1 provided on the piece portion 301b of the drum-like lower blade 301. Reference numeral 301b3 denotes a corner portion of the portion 301b2 that does not have the blade portion of the piece portion 301b of the drum-like lower blade 301. The other piece parts are the same.

  As shown in the drawing, the respective mining surfaces of the disk-shaped upper blades 201a to 201g are arranged in contact with the mining surfaces of the respective blade portions of the piece portions 301a to 301h of the drum-shaped lower blade 301.

  Reference numeral 4 denotes a wide web, and 5 denotes an original winding roll of the wide web 4. Reference numeral 6 denotes a narrow web cut from the wide web 4. Reference numeral 7 denotes a roll-shaped narrow-width web obtained by winding the narrow-width web around the winding shaft. Reference numerals 702 to 707 denote roll-shaped narrow webs wound in a roll shape around the winding shaft.

  Reference numerals 701 and 708 denote rolls wound around unnecessary portions at both ends of the wide web 4 that are generated during cutting. In the cutting shown in this figure, the processed surface of the web is the drum-shaped lower blade side, the disk-shaped upper blade is taken up, or the processed surface is wound outside the roll form or wound during winding. Crab can be set as appropriate depending on the nature of the web and the use of the product.

  FIG. 2 is a schematic sectional view taken along the line BB ′ of FIG.

  In the figure, reference numeral 203 denotes an upper blade holder for fixing the disk-shaped upper blade 201e to the upper blade shaft 202. The upper blade holder 203 includes an upper blade shaft fixing member 203a, a disk-shaped upper blade fixing member 203b, and an annular coil spring 203c which is a side pressure applying means. The disk-shaped upper blade fixing member 203b is fixed to the upper blade shaft fixing member 203a by screws. The disk-shaped upper blade 201e is disposed between the disk-shaped upper blade fixing member 203b and the upper blade shaft fixing member 203a. The disk-shaped upper blade 201e is connected to the side of the surface 201e1 of the disk-shaped upper blade 201e and the disk-shaped upper blade fixing member. By disposing an annular coil spring 203c between the member 203b and the disk-shaped upper blade 201e, a side pressure is applied to the drum-shaped lower blade 301, and the disk-shaped upper blade 201e is elastically pressed in the axial direction of the drum-shaped lower blade 301. The anti-mineral surface 201e2 of the upper blade 201e and the minute surface of the blade portion 301e1 of the piece portion 301e2 of the drum-shaped lower blade 301 are in contact with each other in a state inclined at a predetermined angle. All the disk-shaped upper blades and the drum-shaped lower blades shown in FIG. 1 are in the state shown in this figure.

  When the wide web is cut while rotating the disk-shaped upper blade and the drum-shaped lower blade assembled in such a state, the annular coil spring is a disk-shaped upper blade fixing member each time the disk-shaped upper blade rotates once. The radial direction or central axis of the disk-shaped upper blade according to the offset distance between the disk-shaped upper blade and the drum-shaped lower blade while making contact between the surface facing the disk-shaped upper blade and the surface of the disk-shaped upper blade And reciprocating vertically. For this reason, the surface facing the disk-shaped upper blade of the disk-shaped upper blade fixing member that is in contact with the ring-shaped coil spring after long-term use wears out along the shape of the ring-shaped coil spring, The coil spring is fitted, and the movement of the annular coil spring during cutting is obstructed. Further, when the cutting powder enters the worn portion, the movement of the annular coil spring during the cutting is further inhibited. As a result, the side pressure on the disk-shaped upper blade becomes unstable, and the cutting surface is crushed, broken, and the like. This increases the frequency of blade re-polishing and contributes to a decrease in production efficiency. The present invention relates to a wide web cutting apparatus and a wide web cutting method that stably maintain a side pressure when an annular coil spring is used as a side pressure applying means, as shown in FIG.

  The offset distance will be described. Normally, when setting the upper and lower blades to production conditions, after moving the upper blade holder on the upper blade shaft in the axial direction so that the anti-mineral surface of the disk-shaped upper blade contacts the anti-mineral surface of the lower drum blade The upper blade shaft and the upper blade holder are fixed. Next, the upper blade shaft is moved a predetermined distance in the axial direction where the upper blade and the lower blade are further in contact with each other, whereby the coil spring set in the upper blade holder is pushed back, and the necessary contact between the upper blade and the lower blade is achieved. Getting pressure. A predetermined distance by which the upper blade axis is moved from the point where the upper blade contacts the lower blade is referred to as an offset distance.

  FIG. 3 is an enlarged schematic cross-sectional view of a portion indicated by Q in FIG.

  In the figure, reference numeral 203b1 denotes a facing surface facing the mining surface 201e1 of the disk-shaped upper blade 201e of the disk-shaped upper blade fixing member 203b. The facing surface 203b1 has a first inclined surface 203b11 having a processed straight surface as described below, which is a lateral pressure application stabilizing means. The surface of the first inclined surface 203b11 is preferably processed as follows and selected as appropriate. 1) The mirror surface or surface roughness is such that the maximum height -Rmax is 0.3 s or less. The mirror surface or surface roughness is a value measured by a surface roughness measuring machine or a roughness sample. The required mirror surface or surface roughness can be obtained by processing with a general rotary blade polishing machine. 2) The method for finishing the mirror surface is not particularly limited, and examples thereof include high-precision polishing and buff polishing. 3) Surface coating such as hard chrome plating or titanium nitride is performed. 4) After the surface is mirror-finished once, surface coating such as hard chrome plating or titanium nitride is performed to further finish the mirror surface. 5) Use cemented carbide as the material and finish the surface to a mirror surface. 6) Use cemented carbide as the material and coat the surface with hard chrome plating or titanium nitride. 7) There is a method in which a cemented carbide is used as the material and the surface is mirror-finished, and then the surface is coated with hard chrome plating or titanium nitride, and further mirror-finished.

The annular coil spring 203c is disposed at a position so as to abut on the mining surface 201e1 of the disc-shaped upper blade 201e and the first inclined surface 203b11. The annular coil spring 203c is disposed at an angle θ1 (= θ2) at which the contact point that contacts the first inclined surface 203b11 and the surface perpendicular to the central axis of the upper blade shaft member 203b intersects 25 to 25. A position at 40 ° is preferred. Furthermore, 30 to 35 ° is preferable.
When the angle θ1 is less than 25 °, the diameter of the coil spring to be adapted becomes too small, and the sliding of the reciprocating movement of the coil spring may be deteriorated. When the angle θ1 exceeds 40 °, the suitable coil spring diameter becomes excessive, and it may be difficult to stably apply a predetermined side pressure.

  θ2 represents the inclination angle of the first inclined surface 203b11. As a method of disposing the annular coil spring 203c, an annular coil spring having a thickness, a diameter, and a length that gives the required side pressure to the disk-shaped upper blade 201e is connected to the side of the mining surface 201e1 of the disk-shaped upper blade 201e. A method of fitting between the disk-like upper blade fixing member 203b is mentioned. Other symbols are the same as those in FIG.

  As shown in FIGS. 1 to 3, an annular coil spring as a side pressure applying means is disposed on the inclined surface shown in this figure having a linear surface that faces the disk-shaped upper blade of the disk-shaped upper blade fixing member. By doing so, it was confirmed that the following effects were obtained.

  The following effects can be obtained by making the opposed surface of the disk-shaped upper blade fixing member 203b facing the mining surface 201e1 of the disk-shaped upper blade 201e inclined as shown in this figure.

  1) When cutting a wide web while rotating the disk-shaped upper blade and drum-shaped lower blade assembled in such a state, the annular coil spring is fixed to the disk-shaped upper blade every time the disk-shaped upper blade rotates once. Reciprocating in the circumferential direction of the disk-shaped upper blade according to the offset distance between the disk-shaped upper blade and the drum-shaped lower blade while contacting the surface of the member facing the disk-shaped upper blade and the disk-shaped upper blade The frictional force is reduced by setting the surface roughness to 0.1 s or less or a mirror surface, and it becomes possible to prevent wear of the contact point with the annular coil spring.

  2) Use a cemented carbide that is harder than the hardness of the annular coil spring, or make a surface coating such as hard chrome plating or titanium nitride on the surface of the disk-shaped upper blade fixing member that faces the surface of the disk-shaped upper blade. Further, it is possible to prevent wear of the contact point with the annular coil spring on the surface facing the disk-shaped upper blade of the disk-shaped upper blade fixing member by processing in a mirror surface or a combination thereof. It was.

  3) Since it is possible to prevent wear of the contact point of the disk-shaped upper blade fixing member with the annular coil spring on the surface facing the disk-shaped upper blade, the side pressure applied to the disk-shaped upper blade by the coil spring Can be stabilized.

  4) Since the side pressure can be stabilized, the generation and cutting of cutting powder are reduced, cutting quality can be maintained and improved, and production efficiency can be improved.

  5) The life of the disk-shaped upper blade and the drum-shaped lower blade was extended, and maintenance and management became easier.

  FIG. 4 is an enlarged schematic diagram in the case where the surface facing the disk-shaped upper blade of the disk-shaped upper blade fixing member shown in FIG. 3 has a linear inclined surface and an R-shaped inclined surface having a curvature in contact with the straight line. It is sectional drawing.

  In the figure, reference numeral 203b1 denotes a facing surface of the disk-shaped upper blade fixing member 203b that faces the disk-shaped upper blade 201e. The opposing surface 203b1 has a second inclined surface 203b12 having a linear surface that is a lateral pressure application stabilizing means, and a third inclined surface 203b13 having an R-shaped surface. The annular coil spring 203c is disposed at a position so as to come into contact with the mining surface 201e1 of the disc-shaped upper blade 201e and the third inclined surface 203b13. The position where the annular coil spring 203c is disposed is preferably the same as the position shown in FIG. The disposing method is the same as the method shown in FIG. θ3 represents the inclination angle of the second inclined surface 203b12. The inclination angle θ3 is preferably 25 to 40 °. Furthermore, 30 to 35 ° is preferable. When the inclination angle θ3 is less than 25 °, the suitable coil spring diameter becomes too small, and the sliding of the reciprocating movement of the coil spring may be deteriorated. When the inclination angle θ3 exceeds 40 °, the suitable coil spring diameter becomes excessive, and it may be difficult to stably apply a predetermined lateral pressure.

  Further, R of the third inclined surface 203b13 is preferably R2 mm to R10 mm, and more preferably R3 mm to R5 mm. When R is less than R2 mm, it may be difficult to obtain a predetermined lateral pressure under a condition where the offset distance is long. When R exceeds R10 mm, the effect may not be obtained.

  S indicates the length of the second inclined surface 203b12, and T indicates the length of the third inclined surface 203b13. The length S and the length T are preferably the same length. Other symbols are the same as those in FIG.

  The surfaces of the second inclined surface 203b12 and the third inclined surface 203b13 are the same as those of the first inclined surface 203b11 shown in FIG.

  FIG. 5 is an enlarged schematic cross-sectional view showing a case where the surface facing the disk-shaped upper blade of the disk-shaped upper blade fixing member shown in FIG. 3 is an R-shaped inclined surface.

  In the figure, 203b14 indicates a fourth inclined surface. The fourth inclined surface 203b14 is an R-shaped inclined surface. In the case of this figure, the case where the surface 203b1 facing the disk-shaped upper blade of the disk-shaped upper blade fixing member is an R-shaped inclined surface is shown. U1 and U2 indicate the length of the fourth inclined surface 203b14 defined by the contact point of the coil spring 203c. U2 is preferably in the range of 0.5U1 <U2 <U1. The coil spring 203c is disposed so as to be in contact with the mining surface 201e1 of the disk-shaped upper blade 201e and the fourth inclined surface 203b14. The position where the annular coil spring 203c is disposed is preferably the same as the position shown in FIG. The surface of the fourth inclined surface 203b14 is the same as that shown in FIG. Other symbols are the same as those in FIGS.

  R of the fourth inclined surface 203b14 is preferably R25 mm to R50 mm. When R is less than R25 mm, the change in the upper blade side pressure tends to be large, and may not be suitable as a side pressure maintaining means. When R exceeds R50 mm, the effect of stabilizing the upper blade side pressure may not be obtained. The processing of the surface of the fourth inclined surface 203b14 is the same as that of the first inclined surface 203b11 shown in FIG.

  FIG. 6 is an enlarged schematic diagram showing a case where a surface facing the disk-shaped upper blade of the disk-shaped upper blade fixing member shown in FIG. 3 is sandwiched between an inclined surface of an R-shaped surface and an inclined surface of a linear surface in contact with the inclined surface. It is sectional drawing.

  In the figure, 203b15 indicates a fifth inclined surface, 203b16 indicates a sixth inclined surface, and 203b17 indicates a seventh inclined surface. This figure shows the case where the surface facing the disk-shaped upper blade of the disk-shaped upper blade fixing member has a fifth inclined surface 203b15, a sixth inclined surface 203b16, and a seventh inclined surface 203b17. Yes. The coil spring 203c is disposed so as to be in contact with the mining surface 201e1 of the disk-shaped upper blade 201e and the sixth inclined surface 203b16. The position where the annular coil spring 203c is disposed is preferably the same as the position shown in FIG. The surfaces of the fifth inclined surface 203b15, the sixth inclined surface 203b16, and the seventh inclined surface 203b17 are the same as those shown in FIG.

  θ4 indicates the inclination angle of the fifth inclined surface 203b15. The inclination angle θ4 is preferably 25 to 40 °. Furthermore, 30 to 35 ° is preferable. When the inclination angle θ4 is less than 25 °, the suitable coil spring diameter becomes too small, and the sliding of the reciprocating movement of the coil spring may be deteriorated. When the inclination angle θ4 exceeds 40 °, the suitable coil spring diameter becomes excessive, and it may be difficult to stably apply a predetermined lateral pressure.

  θ5 represents the inclination angle of the seventh inclined surface 203b17. The inclination angle θ5 is preferably 50 to 70 °. When the inclination angle θ5 is less than 50 °, if the upper blade has a large amount of offset, the side pressure may drop sharply and the position of the upper blade may become unstable and cutting may not be possible. When the inclination angle θ5 exceeds 70 °, the movement of the coil spring is alienated, the lateral pressure becomes unstable, and stable cutting may not be possible.

  V indicates the length of the sixth inclined surface 203b16. The length W is preferably 2 to 3 mm. When the length W is less than 2 mm, the change in the side pressure due to the reciprocating movement of the coil spring tends to be excessive, and the position of the upper blade may become unstable and cutting may not be possible. When the length W exceeds 3 cm, in many cases, the reciprocating distance of the coil spring is exceeded, so the side pressure stabilization effect may be reduced.

  R of the sixth inclined surface 203b16 is preferably R25 mm to R40 mm. When R is less than R25 mm, the change in the upper side pressure is excessive, and may not be suitable as a side pressure means. When R exceeds R40 mm, the effect of providing the seventh inclined surface 203b17 may not be obtained. Other symbols are the same as those in FIGS. 1 and 2.

  FIG. 7 is a schematic diagram showing the relationship between the offset distance between the upper and lower blades and the lateral pressure on the upper blade.

  In the figure, the vertical axis represents the side pressure, and the horizontal axis represents the offset distance between the upper and lower blades. Curve B and curve B ′ show the change in the side pressure of the upper blade accompanying the change in the offset distance of the upper and lower blades when the conventional shape upper blade holder is used, and the time between the curve B and the curve B ′ is shown. The distribution of side pressure is shown.

  Curves C and C ′ show changes in the side pressure of the upper blade accompanying changes in the offset distance of the upper and lower blades when the upper blade holder shown in FIGS. 2 to 6 is used. The side pressure distribution is shown between the two.

This will be described with reference to the change in the side pressure of the upper blade when the offset distance of the upper and lower blades changes. If the offset distance of the upper and lower blades when changed from X ₁ to X _2, the change in the lateral pressure on the blade when using the blade holder on the conventional shape, it varies greatly from Y ₂ to Y ₂ '. In contrast, a change in the lateral pressure on the blade when using the blade holder on which is shown in Figures 2-6, if it varies from the Y ₁ to Y ₁ 'using the blade holder on the conventional shape Compared with, the change in the side pressure of the upper blade is small and stable.

  As shown in FIGS. 1, 2, and 4 to 7, an annular coil spring as a side pressure applying means is provided on a surface facing the disk-shaped upper blade of the disk-shaped upper blade fixing member. It has been confirmed that the following effects can be obtained by disposing on the inclined surface of the R-shaped surface shown in FIG.

  1) When cutting a wide web while rotating the disk-shaped upper blade and the drum-shaped lower blade assembled in such a state, the coil spring is a disk-shaped upper blade fixing member each time the disk-shaped upper blade rotates once. When reciprocating in the circumferential direction of the disk-shaped upper blade according to the offset distance between the disk-shaped upper blade and the drum-shaped lower blade while contacting between the surface facing the disk-shaped upper blade and the disk-shaped upper blade The frictional force is relaxed by making the inclined surface of the R-shaped surface, and it becomes possible to prevent wear of the contact point with the annular coil spring.

  2) The surface facing the disk-shaped upper blade of the disk-shaped upper blade fixing member is made of cemented carbide, mirror-finished, or a surface coating such as hard chrome plating or titanium nitride, or a combination of these. By further processing, it becomes possible to prevent wear of the contact point between the disk-shaped upper blade fixing member and the annular coil spring on the surface facing the disk-shaped upper blade.

  3) Since it is possible to prevent wear of the contact point of the disk-shaped upper blade fixing member with the annular coil spring on the surface facing the disk-shaped upper blade, the side pressure applied to the disk-shaped upper blade by the coil spring Can be stabilized.

  4) Stabilization of the side pressure makes it possible to maintain the cutting quality and improve the production efficiency by eliminating the generation of cutting powder when cutting wide webs and cutting the cutting surface. It was.

  5) The life of the disk-shaped upper blade and the drum-shaped lower blade was extended, and maintenance and management became easier.

  As shown in FIG. 1 to FIG. 6, the side pressure applied to the disk-shaped upper blade using a coil spring as a side pressure applying means cannot be determined because it changes depending on the type of the wide web to be cut. The optimum side pressure can be set by adjusting the offset distance, the coil spring diameter, and the length.

  It is preferable that the material of the coil spring as the side pressure applying means according to the present invention is lower than the hardness of the disk-shaped upper blade and the disk-shaped upper blade fixing member. The material of the coil spring is preferably spring steel having a Vickers hardness of 500 to 900, and it is preferable to select a harder material for the disk-shaped upper blade fixing member and the disk-shaped upper blade. Examples of the disk-shaped upper blade fixing member include SK, SKD, SKH steel having a Vickers hardness of 500 to 800, S50C to S60C steel having a Vickers hardness of 650 to 750, and a powder HSS having a Vickers hardness of 850 to 950. Steel, various steel materials with nitriding surface with Vickers hardness of 650-1100, various steel materials with hard hard chrome plating with 800-1100Hv Vickers hardness, cemented carbide with Vickers hardness of 1000-1600, Vickers hardness Examples include various steel materials coated with titanium nitride having a length of 1800 to 3500. EXAMPLES The present invention will be specifically described below with reference to examples, but the embodiments of the present invention are not limited to these examples.

(Preparation of upper blade holder)
Using the upper blade holder shown in FIG. 4, the upper blade holder in which the shape of the second inclined surface and the third inclined surface of the disk-shaped upper blade fixing member facing the disk-shaped upper blade is changed as shown in Table 1. Prepare No. a to c. In addition, the surface of the 2nd inclined surface of the upper blade holder a was made into the mirror surface finish of SKH. The shape of the upper blade holder b is the same as that of the upper blade holder a, and the upper and lower blade holders b are mirror-finished with titanium nitride coating on the second inclined surface and the third inclined surface of the disk-shaped upper blade. . As a comparison, an upper blade holder having a first inclined surface as a surface facing the disk-shaped upper blade shown in FIG. 3 and having the first inclined surface finished to the conventional condition of 0.6 s is prepared for comparison. The upper blade holder d was obtained. The shape of the upper blade holder c is the same as that of the upper blade holder d, and the first inclined surface is mirror-finished with hard chrome plating 0.2s. Each of the upper blade holders was prepared in seven pieces necessary for cutting, and various upper blade holders were sequentially installed in the same cutting machine for each cutting test.

In the table, A is SKH, B is SKH with titanium nitride mirror-finished, C is S45C with hard hard chrome-plated mirror finish, and D is S45C.
(Assembly / cutting of drum-shaped lower blade and disk-shaped upper blade to cutting device)
Using the prepared upper blade holders a to d, the drum-shaped lower blade minet surface and the anti-mineral surface of each disk-shaped upper blade attached to the upper blade shaft are assembled so as to contact each other as shown in FIG. Samples 101 to 104 were prepared by performing a continuous cutting operation for 5 months.

Evaluation Samples were sampled from the cutting web every two weeks immediately after the start of cutting, attached to each of the prepared samples 101 to 104, the state of the edge face of the edge and the edge of the upper blade was observed, and the results evaluated according to the following evaluation rank It shows in Table 2.

Evaluation rank of cutting surface and upper blade edge condition ○: Abnormal generation of cutting powder, abnormal wear of upper cutting edge is not recognized △: Cutting powder increases but cutting edge end face sharpness and upper cutting edge The state of wear within the allowable limit level x: The condition that the cutting powder further increased, and the degree of cutting edge face breakage or upper blade wear increased to the limit level. The cutting test is completed, and replacement with a re-polished upper blade is performed.

  The upper blade holder (a) had no problem with the cutting surface immediately after assembly, but after one month of use, the generation of cutting powder and wear of the upper blade edge increased, and the upper blade had to be re-polished. . With respect to the upper blade holders (a), (b), and (c) of the present invention, the time until re-polishing of the upper blade was longer than that of the comparative upper blade holder d, and the effectiveness of the present invention was confirmed.

It is the schematic which shows an example of the cutting method using the cutting device which has two or more sets of a disk-shaped upper blade and a drum-shaped lower blade. It is a schematic sectional drawing in alignment with BB 'of FIG. It is an expansion schematic sectional drawing of the part shown by Q of FIG. FIG. 4 is an enlarged schematic cross-sectional view in the case where the surface facing the disk-shaped upper blade of the disk-shaped upper blade fixing member shown in FIG. 3 has a linear inclined surface and an inclined surface of an R-shaped surface having a curvature in contact with the straight line. is there. It is an expansion schematic sectional drawing which shows the case where the opposing surface with the disk shaped upper blade of the disk shaped upper blade fixing member shown in FIG. 3 is an inclined surface of an R-shaped surface. FIG. 4 is an enlarged schematic cross-sectional view showing a case where a surface facing the disk-shaped upper blade of the disk-shaped upper blade fixing member shown in FIG. 3 is sandwiched between an R-shaped inclined surface and a linear inclined surface in contact therewith. is there. It is the schematic which shows the relationship between the offset distance of an up-and-down blade, and the side pressure to an upper blade.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutting device 2 Upper blade part 201a-201g Disk-shaped upper blade 202 Upper blade shaft 203 Upper blade holder 203a Upper blade shaft fixing member 203b Disk-shaped upper blade fixing member 203c Coil spring 203b11 1st inclined surface 203b12 2nd inclined surface 203b13 3rd inclined surface 203b14 4th inclined surface 203b15 5th inclined surface 203b16 6th inclined surface 203b17 7th inclined surface 3 Lower blade part 301 Drum-shaped lower blade 301a-301h Piece part 301a1-301g1 Blade part 4 Wide web 6 Narrow web 302 Lower blade axis θ1 to θ5 Inclination angle R to X Length

Claims (10)

A wide web that runs continuously is pressed against a drum-shaped lower blade having a piece portion and a blade portion disposed on a lower blade shaft, and a lateral pressure is applied to the drum-shaped lower blade in the axial direction by lateral pressure applying means. A rotary blade comprising at least one set having a blade edge opposed to each other at one or two positions of the blade portion and a disk-shaped upper blade disposed on the upper blade shaft via an upper blade holder In the wide web cutting apparatus for continuously cutting the wide web into at least two narrow webs along the running direction by embracing the drum-like lower blade,
The upper blade holder has a disk-shaped upper blade fixing member, a side pressure applying means, and an upper blade shaft fixing member,
The disk-shaped upper blade is disposed between the disk-shaped upper blade fixing member and the upper blade shaft fixing member,
The side pressure applying means is disposed in a state in which the disk-shaped upper blade fixing member is in contact with the surface of the disk-shaped upper blade opposite to the surface of the disk-shaped upper blade and the surface of the disk-shaped upper blade.
A wide web cutting apparatus characterized in that a side pressure application stabilizing means is provided on the facing surface. 2. The wide web cutting apparatus according to claim 1, wherein the lateral pressure application stabilizing means is a mirror-like linear surface provided on the opposing surface. 3. The wide web cutting apparatus according to claim 2, wherein the straight surface has a hard coat layer on the surface, and the hard coat layer is finished in a mirror shape. 2. The wide web cutting apparatus according to claim 1, wherein the lateral pressure applying and stabilizing means is an R-shaped surface provided on at least a part of the opposing surface. 5. The wide web cutting device according to claim 4, wherein the R-shaped surface is mirror-finished. 6. The wide web cutting apparatus according to claim 4, wherein a hard coat layer is provided on the opposing surface having the R-shaped surface. 7. The wide web cutting apparatus according to claim 6, wherein the hard coat layer is mirror-finished. The wide web cutting apparatus according to any one of claims 1 to 7, wherein a hardness of a material of the disk-shaped upper blade fixing member is equal to or higher than a hardness of a material of the lateral pressure applying means. . The wide web cutting apparatus according to any one of claims 1 to 8, wherein the side pressure applying means is a coil spring. A wide web that runs continuously is pressed against a drum-shaped lower blade having a piece portion and a blade portion disposed on a lower blade shaft, and a lateral pressure is applied to the drum-shaped lower blade in the axial direction by lateral pressure applying means. A rotary blade comprising at least one set having a blade edge opposed to each other at one or two positions of the blade portion and a disk-shaped upper blade disposed on the upper blade shaft via an upper blade holder In the wide web cutting method, the wide web cutting apparatus is used to continuously cut the wide web into at least two narrow webs along the traveling direction by holding the drum-like lower blade. ,
The wide web cutting method according to any one of claims 1 to 9, wherein the wide web cutting device is the wide web cutting device.

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