JP2011148035A - Slitter and method of manufacturing magnetic tape using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slitter excellent in stability in moving in the vicinity of a web cutting position and capable of improving slitting quality, and a method of manufacturing a magnetic tape using the slitter. <P>SOLUTION: The slitter 1 for cutting the web 15 includes a driving roller 32 for carrying the web 15, a cutter 30 for cutting the web 15 and contact means 33 and 34 for bringing the web 15 into contact with the driving roller 32. The web 15 comes into contact with one driving roller 32 at a first contact position 38 and a second contact position 39 by the contact means 33 and 34. The web cutting position 37 on a carrying route of the web 15 is located between the first contact position 38 and the second contact position 39. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a slitting device for cutting a web such as a magnetic tape and a method of manufacturing a magnetic tape using the slit device.

  As a device for cutting a film or a tape into a necessary width, a device called a cutting device or a slit device is known (see, for example, Patent Document 1).

  In the cutting device and the slitting device, the web is drawn out from the feeding portion around which the web is wound, and the drawn web is cut into a necessary width by a cutter and wound around the winding portion.

  FIG. 5 shows a configuration diagram of an example of a conventional slit device. The slit device 100 shown in this figure is a slit device for a magnetic tape. The magnetic tape 102 delivered from the delivery unit 101 is guided by a plurality of guide rollers 104 to 108 while being controlled to an appropriate tension by a tension arm 103, and is supported by a first drive roller 109 and a nip roller 110 with a narrow pressure. Be transported.

  Thereafter, the magnetic tape 102 is cut by the upper blade 113 and the lower blade 114 of the cutter 112 through the guide roller 111. The cut magnetic tapes 102 a and 102 b are each supported by a second driving roller 117 and a nip roller 118 through a guide roller 115, are driven and conveyed, and are wound by a winding unit 120 via a guide roller 119.

JP 11-278728 A

  In the conventional slitting device as described above, if the running vibration of the magnetic tape 102 before cutting and the magnetic tape 102a, 102b after cutting is transmitted to the vicinity of the cutting position of the cutter 112, the slit quality of the magnetic tape is affected. become. Specifically, the running vibration of the magnetic tape in the vicinity of the cutting position causes fluctuations in the slit width of the magnetic tape and waving in which the cut end (edge) of the tape is deformed in a wave shape.

  Furthermore, if the first driving roller 109 and the second driving roller 117 are independent, independent control is performed for each driving roller, so that it is difficult to completely interlock the driving rollers. It may happen that the web or tape is pulled with the downstream side, loosened on the contrary, or the tensions interfere with each other. This also causes fluctuations in the slit width of the magnetic tape and waving in which the cut end (edge) of the tape is deformed into a wave shape.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and is a slit device that is excellent in running stability in the vicinity of a web cutting position and can improve slit quality, and a method of manufacturing a magnetic tape using the same. The purpose is to provide.

  In order to achieve the above object, a slitting device according to the present invention is a slitting device for cutting a web, wherein a driving roller for conveying the web, a cutter for cutting the web, and the web against the driving roller. The web is in contact with the one drive roller at the first contact position and the second contact position by the contact means, and the web transport path. The cutting position of the web is between the first contact position and the second contact position.

  The method for manufacturing a magnetic tape according to the present invention is a method for manufacturing a magnetic tape using the slit device according to the present invention, wherein the raw material of the magnetic tape is cut into a plurality of the magnetic tapes by the slit device. And

  According to the present invention, the running stability in the vicinity of the cutting position of the web is excellent, and the slit quality can be improved.

The block diagram of the slit apparatus 1 which concerns on Embodiment 1 of this invention. (A) The figure is a principal part perspective view of the cutter 30, (b) The perspective view which shows a mode that the magnetic tape 15 is cut | judged by the cutter 30. FIG. The block diagram of the slit apparatus 2 which concerns on Embodiment 2 of this invention. The block diagram of the slit apparatus 3 which concerns on Embodiment 3 of this invention. The block diagram of an example of the conventional slit apparatus.

  According to the present invention, the running vibration of the web on the upstream side and the downstream side with respect to the cutting position by the cutter can be cut off at the first contact position and the second contact position, respectively. Further, the web is in contact with one common driving roller at the first contact position and the second contact position. For this reason, it is not necessary to adjust the interlocking between the independent driving rollers, and it is possible to prevent the web tensions from interfering with each other due to the incomplete interlocking between the independent driving rollers.

  As a result, in the web conveyance path, between the first contact position and the second contact position, traveling vibration and tension interference are suppressed for both the web before and after cutting. Become. On the other hand, in the web conveyance path, the cutting position of the web is between the first contact position and the second contact position. Therefore, at the cutting position of the web, it is possible to suppress running vibration and interference of tension, and to cut the web that travels in an orderly manner, thereby improving the slit quality. That is, it is possible to suppress the width variation of the slit width of the web and the webbing in which the cut end (edge) of the web is deformed into a wave shape.

  In the slit device of the present invention, it is preferable that the cutter includes a pair of rotary blades, and one of the pair of rotary blades also serves as the drive roller. According to this configuration, the web conveyance path between the first contact position and the second contact position can be shortened, which is advantageous in suppressing the web running vibration in the vicinity of the cutting position.

  Further, it is preferable that the web is in contact with the driving roller in a plane between the first contact position and the second contact position. This configuration is also advantageous for suppressing web running vibration in the vicinity of the cutting position.

  The contact means is preferably a roller.

  Moreover, it is preferable that the said contact means is a suction means provided in the said drive roller.

  Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a configuration diagram of a slit device 1 according to Embodiment 1 of the present invention. The slit device 1 shows an example of a slit device for a magnetic tape, and the web to be cut is a magnetic tape.

  The slit device 1 includes a sending unit 20 for sending out the magnetic tape 15 as a raw fabric, a cutter 30 for cutting the magnetic tape 15, and a winding unit 50 for winding the cut magnetic tape.

  A guide roller 4-8 is disposed on the conveyance path between the sending unit 20 and the cutter 30. Similarly, guide rollers 9 and 10 are disposed between the cutter 30 and the winding unit 50. These guide rollers 4-10 play a role of guiding the conveyance path of the magnetic tape 15 and the cut magnetic tapes 15a and 15b between the sending unit 20 and the winding unit 50.

  The cutter 30 includes an upper blade 31 and a drive roller 32. The drive roller 32 is integrally formed with a lower blade 36 (FIG. 2A). The magnetic tape 15 is sandwiched between the driving roller 32 and the nip roller 33 and between the driving roller 32 and the nip roller 34. As a result, the magnetic tape 15 and the cut magnetic tapes 15 a and 15 b are supported by the driving roller 32 and conveyed by the rotation of the driving roller 32.

  Between the cutter 30 and the winding unit 50, a driving roller 40 corresponding to each of the cut magnetic tapes 15a and 15b is disposed. The magnetic tapes 15a and 15b are sandwiched between the drive roller 40 and the nip roller 41, respectively. Thus, the magnetic tapes 15 a and 15 b are supported by the driving roller 40 and are conveyed by the rotation of the driving roller 40.

  As described above, the slit device 1 includes the drive roller 32 and the drive roller 40, so that the uncut magnetic tape 15 fed from the sending unit 20 is conveyed in the directions of arrows a and b, and after the cut. The magnetic tapes 15a and 15b are transported in the direction of the arrow c and wound up by the winding unit 50.

  Hereinafter, the process until the magnetic tape 15 delivered from the delivery unit 20 is taken up by the take-up unit 50 will be described along the conveyance path. The magnetic tape 15 delivered from the delivery unit 20 reaches the position of the cutter 30 while being guided by a plurality of guide rollers 4-8 and conveyed in the directions of arrows a and b. Of the plurality of guide rollers 4-8, the guide roller 5 is connected to the tension arm 16. By moving the tension arm 16, the position of the guide roller 5 is moved, and the tension of the magnetic tape 15 is controlled.

  The magnetic tape 15 that has reached the cutter 30 passes between the upper blade 31 and the drive roller 32 and is cut. FIG. 2A shows a perspective view of the main part of the cutter 30. The disk-shaped upper blade 31 is integrated with the shaft 35. A groove-shaped lower blade 36 is integrated with the driving roller 32. The magnetic tape 15 passes between the upper blade 31 and the lower blade 36 and is cut.

  FIG. 2B is a perspective view showing a state in which the magnetic tape 15 is cut by the cutter 30. The magnetic tape 15 is cut into the magnetic tape 15 a and the magnetic tape 15 b at the position of the upper blade 31 while being conveyed by the driving roller 32.

  As shown in FIG. 1, the cut magnetic tapes 15 a and 15 b are respectively conveyed by the driving roller 40 and are wound around the winding unit 50 while being guided by the rollers 9 and 10.

  Here, in the slit device 1, when the vibration or tension interference occurs on the magnetic tape in the vicinity of the cutting position 37 of the cutter 30, the slit quality of the magnetic tape is affected. Specifically, running vibration and tension interference of the magnetic tape cause fluctuations in the slit width of the magnetic tape and waving in which the cut end (edge) of the tape is deformed in a wave shape. The traveling vibration of the magnetic tape in the vicinity of the cutting position 37 is caused by the traveling vibration of the magnetic tape 15 on the upstream side (sending part 20 side) with respect to the cutting position 37 and the downstream side (winding part 50 side) with respect to the cutting position 37. In the magnetic tapes 15a and 15b. Further, interference of magnetic tape tension is likely to occur between independent drive rollers.

  In the present embodiment, the magnetic tape 15 is sandwiched between the driving roller 32 and the nip roller 33 as a contact means on the upstream side with respect to the cutting position 37, and the cut magnetic tape 15 a, on the downstream side with respect to the cutting position 37, 15b is sandwiched between a driving roller 32 and a nip roller 33 as a contact means. As a result, traveling vibration in the vicinity of the cutting position 37 is reduced, and the slit quality is improved.

  Further, the first abutting position 38 and the second abutting position 39 are on one common driving roller 32, so that interference of tension near the cutting position 37 is reduced and the slit quality is improved. I am doing so.

  This will be described below with reference to FIGS. As shown in FIG. 1, the magnetic tape 15 is in contact with the driving roller 32 at the first contact position 38 by the nip roller 33 as contact means. As a result, the traveling vibration of the magnetic tape 15 due to the conveyance from the sending unit 20 to the drive roller 32 can be interrupted at the first contact position 38.

  Further, the cut magnetic tapes 15a and 15b are in contact with the driving roller 32 at the second contact position 39 by the nip roller 34 as contact means. Thus, the running vibration of the magnetic tapes 15 a and 15 b accompanying the conveyance from the driving roller 32 to the winding unit 50 can be cut off at the second contact position 39.

  As a result, in the magnetic tape conveyance path, between the first contact position 38 and the second contact position 39, both the magnetic tape 15 before cutting and the magnetic tapes 15a, 15b after cutting are cut. That is, the running vibration is suppressed.

  Further, the first contact position 38 and the second contact position 39 are on one common driving roller 32. For this reason, in the configuration of the present embodiment, the first abutting position 38 and the second abutting position 39 are different from each other on the independent driving rollers. Adjustment is not necessary, and it is possible to prevent the tension of the magnetic tapes from interfering with each other due to incomplete interlocking between independent drive rollers.

  As a result, in the magnetic tape conveyance path, between the first contact position 38 and the second contact position 39, both the magnetic tape 15 before cutting and the magnetic tapes 15a, 15b after cutting are cut. Therefore, the interference of tension is suppressed.

  On the other hand, the cutting position 37 is between the first contact position 38 and the second contact position 39 in the magnetic tape transport path. Therefore, at the cutting position 37, interference of running vibration and tension can be suppressed, and the magnetic tape 15 running in an orderly manner can be cut, and the slit quality can be improved. That is, it is possible to suppress the width fluctuation of the slit width of the magnetic tape and the waving in which the cut end (edge) of the tape is deformed in a wave shape.

  In the present embodiment, as described above, since the driving roller 32 also serves as the lower blade of the cutter 30, the distance between the first contact position 38 and the second contact position 39 can be shortened. . Further, the magnetic tape 15 and the cut magnetic tapes 15 a and 15 b can be brought into contact with the drive roller 32 in a plane between the first contact position 38 and the second contact position 39. These configurations can also suppress traveling vibration and are advantageous in improving slit quality.

  Note that the nip roller 34 may have a structure in which the nip roller 34 comes into contact with each cut tape.

(Embodiment 2)
FIG. 3 shows a configuration diagram of the slit device 2 according to the second embodiment of the present invention. The slit device 2 shows an example of a slit device for a magnetic tape as in the first embodiment, and the web to be cut is a magnetic tape. Parts having the same configurations as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Hereinafter, parts different from those of the first embodiment will be mainly described.

  The cutter 30a includes an upper blade 31 and a lower blade roller 32a. In the configuration of FIG. 1 of the first embodiment, the drive roller 32 also serves as the lower blade of the cutter 30, whereas in the configuration of the second embodiment shown in FIG. 3, separately from the lower blade roller 32 a. A dedicated drive roller 60 is provided.

  The magnetic tape 15 that is the raw material fed from the feeding unit 20 reaches the driving roller 60 through the guide rollers 4-8 and 11. The magnetic tape 15 further passes through the guide rollers 12 and 13 and reaches the cutter 30a. The configuration of the cutter 30a corresponds to a configuration in which the nip rollers 33 and 34 are removed from the cutter 30 shown in FIG.

  The magnetic tape 15 is cut by passing between the upper blade 31 and the lower blade roller 32a of the cutter 30a, and the cut magnetic tapes 15a and 15b reach the driving roller 60 again. Therefore, the drive roller 60 is sandwiched between the magnetic tape 15 before cutting and the magnetic tapes 15a and 15b after cutting.

  Specifically, the magnetic tape 15 is in contact with the drive roller 60 at the first contact position 63 by a nip roller 61 as contact means. As a result, the traveling vibration of the magnetic tape 15 accompanying the conveyance from the sending unit 20 to the driving roller 60 can be cut off at the first contact position 63.

  Further, the cut magnetic tape 15a or 15b is in contact with the driving roller 60 at the second contact position 64 by the nip roller 62 as contact means. As a result, the traveling vibration of the magnetic tapes 15 a and 15 b accompanying the conveyance from the driving roller 60 to the winding unit 50 can be cut off at the second contact position 72.

  That is, as in the first embodiment, the magnetic tape 15 before cutting and the magnetic tape 15a after cutting are between the first contact position 63 and the second contact position 64 in the magnetic tape transport path. , 15b, traveling vibration is suppressed.

  Further, the first contact position 63 and the second contact position 64 are on one common driving roller 60. Therefore, as in the first embodiment, the magnetic tape 15 before cutting and the magnetic tape after cutting are between the first contact position 63 and the second contact position 64 in the magnetic tape transport path. For both 15a and 15b, interference of tension is suppressed.

  On the other hand, the cutting position 37 is between the first contact position 63 and the second contact position 64 in the magnetic tape transport path. Therefore, at the cutting position 37, interference of running vibration and tension can be suppressed, and the magnetic tape 15 running in an orderly manner can be cut, and the slit quality can be improved.

(Embodiment 3)
FIG. 4 shows a configuration diagram of the slit device 3 according to Embodiment 3 of the present invention. The slit device 3 shows an example of a slit device for a magnetic tape as in the first and second embodiments, and the web to be cut is a magnetic tape.

  The slit device 3 shown in FIG. 4 is obtained by replacing the drive roller 60 and the pair of nip rollers 61 and 62 of the slit device 2 shown in FIG. Parts having the same configuration as those of the second embodiment are denoted by the same reference numerals and description thereof is omitted. Hereinafter, parts different from those of the second embodiment will be mainly described.

  In the slit device 2 according to Embodiment 2 shown in FIG. 3, the nip rollers 61 and 62 are contact means for bringing the magnetic tape into contact with the drive roller 60. On the other hand, in the slit device 3 according to the third embodiment shown in FIG.

  The drive roller 70 is a suction roller and constitutes a part of the suction means, and a through hole is formed in the outer peripheral surface of the hollow drive roller 70. Due to the suction by the suction device connected to the driving roller 70, the air outside the driving roller 70 is sucked into the driving roller 70 from the through hole on the outer peripheral surface of the driving roller 70. As a result, the magnetic tape running on the outer peripheral surface of the drive roller 70 comes into contact with the outer peripheral surface of the drive roller 70.

  In FIG. 4, the magnetic tape 15 is attracted in the direction of the arrow d at the first contact position 71 and is in contact with the drive roller 70. As a result, the traveling vibration of the magnetic tape 15 due to the conveyance from the sending unit 20 to the drive roller 70 can be cut off at the first contact position 71.

  Further, the cut magnetic tape 15 a or 15 b is attracted in the direction of arrow e at the second contact position 72 and is in contact with the drive roller 70. Accordingly, the traveling vibration of the magnetic tapes 15 a and 15 b accompanying the conveyance from the driving roller 70 to the winding unit 50 can be cut off at the second contact position 72.

  That is, as in the second embodiment, the magnetic tape 15 before cutting and the magnetic tape 15a after cutting are between the first contact position 71 and the second contact position 72 in the magnetic tape transport path. , 15b, traveling vibration is suppressed.

  Further, the first contact position 71 and the second contact position 72 are on one common driving roller 70. Therefore, as in the second embodiment, the magnetic tape 15 before cutting and the magnetic tape after cutting are between the first contact position 71 and the second contact position 72 in the magnetic tape transport path. For both 15a and 15b, interference of tension is suppressed.

  On the other hand, the cutting position 37 is between the first contact position 71 and the second contact position 72 in the magnetic tape transport path. Therefore, at the cutting position 37, interference of running vibration and tension can be suppressed, and the magnetic tape 15 running in an orderly manner can be cut, and the slit quality can be improved.

  In the third embodiment, the drive roller 60 and the pair of nip rollers 61 and 62 shown in FIG. 3 are replaced with the drive roller 70. However, the drive roller 32 and the pair of nip rollers 33 shown in FIG. , 34 may be replaced with a drive roller 70 provided with suction means.

  Moreover, in each said embodiment, arrangement | positioning and the number of guide rollers are examples, and what is necessary is just to change suitably. Further, instead of the rotatable guide roller, a fixed guide having a web guide surface may be used.

  For example, it is preferable that a tension control unit or the like is further provided between the guide roller 8 and the first contact position because the web running vibration at the first contact position can be efficiently suppressed.

  Moreover, although the web to be cut of the slit device has been described with the example of the magnetic tape, the cut target may be another film or tape.

  As described above, according to the present invention, since the running stability in the vicinity of the cutting position of the web is excellent and the slit quality can be improved, the present invention is useful, for example, as a slit device for a magnetic tape.

1, 2, 3 Slit device 15 Magnetic tape 15a, 15b Cut magnetic tape 30, 30a Cutter 31 Upper blade 32, 60, 70 Drive roller 32a Lower blade roller 33, 34, 61, 62 Nip roller (contact means)
36 Lower blade 38, 63, 71 First contact position 39, 64, 72 Second contact position 37 Cutting position

Claims (6)

A slitting device for cutting a web,
A drive roller for conveying the web;
A cutter for cutting the web;
Abutting means for abutting the web against the driving roller;
The web is brought into contact with the one driving roller at the first contact position and the second contact position by the contact means,
In the web conveyance path, the cutting position of the web is between the first contact position and the second contact position.   The slit device according to claim 1, wherein the cutter includes a pair of rotary blades, and one of the pair of rotary blades also serves as the drive roller.   3. The slit device according to claim 1, wherein the web is in contact with the driving roller in a planar shape between the first contact position and the second contact position.   The slit device according to claim 1, wherein the contact means is a roller.   The slit device according to any one of claims 1 to 4, wherein the contact means is a suction means provided on the drive roller.   A magnetic tape manufacturing method using the slitting device according to any one of claims 1 to 5, wherein the magnetic tape is cut into a plurality of magnetic tapes by the slitting device. Tape manufacturing method.

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