JP4673759B2 - Tape reel and method for manufacturing the same - Google Patents

Description

  The present invention relates to a high-precision tape reel and a method for manufacturing the same.

  In recent years, the means for transmitting information such as optical fiber at a high speed has been remarkably developed, and while it is possible to transfer images and data having a huge amount of information, advanced technology for recording, reproducing and storing them is required. It has come to be. Recording and playback media include flexible disks, magnetic drums, hard disks, magnetic tapes, etc. Tape-like recording media such as magnetic tapes have a large recording capacity per volume, and are used for data backup and other purposes. The place to bear is big. Examples of the tape-shaped recording medium include a magnetic tape and an optical tape.

  The tape-shaped recording medium is usually used in a state of being wound around a reel and housed in a cartridge. Recently, as the recording capacity of the tape cartridge increases, the reels are required to further improve the shape accuracy and rotation accuracy.

There are two-piece types and three-piece types of reels (see, for example, Patent Document 1 and Patent Document 2). As shown in FIG. 9, a two-piece type reel 100 includes, for example, a hub 102 on which a magnetic tape can be wound around an outer peripheral surface 101, and a disk-shaped first flange 103 welded and fixed to the hub 102 and having an opening in the center. And a disk-like second flange 104 integrally formed with the hub 102. The hub 102 and the first flange 103 can be joined by ultrasonic welding, caulking, or the like. As shown in FIG. 10, when the reel 100 is used, the magnetic tape 105 is wound around the outer peripheral surface 101 of the hub 102. As shown in FIGS. 11A and 11B, the hub 102 as a component part of a two-piece type reel is formed integrally with the second flange 104, and the second flange 104 is formed to project from the outer periphery of the hub 102 in the radial direction.

On the other hand, in the three-piece type reel, for example, in the two-piece type reel, the reel 100 and the second flange 104 are further formed as separate parts. In the three-piece type reel, the first flange, the hub, and the second flange are joined by ultrasonic welding, snap fit, or the like.
Japanese Patent Laid-Open No. 10-320958 JP 2002-298542 A

  The components of both two-piece type reels and three-piece type reels are often manufactured by resin injection molding. In the two-piece type reel, the first flange and the hub provided with the second flange are separately manufactured by injection molding. In that case, since the 1st flange is flat disk shape, the resin flow at the time of injection molding is smooth, and it can manufacture with shape accuracy. However, the hub with the second flange is bent when the resin flows during injection molding because the flange is bent with respect to the winding surface of the hub and the thickness of the winding surface of the hub is different from that of the flange. The internal pressure of the mold is likely to be non-uniform, and it is difficult to integrally form the hub and the second flange with high accuracy. For this reason, there exists a problem that the shape precision of the reel which joins and uses these each components also falls.

  On the other hand, in the three-piece type reel, the first flange, the hub, and the second flange are separately produced by injection molding. Each part of the three-piece type reel does not have a large bent portion, and the thickness thereof is almost uniform, so that it can be manufactured with higher shape accuracy than a two-piece type part. However, in order to manufacture a three-piece type reel, it is necessary to join flanges on both sides of the hub, usually in order to join one flange to the hub and then join the other flange. There is a problem that a manufacturing process is complicated because a process of inverting the hub is required. In addition, a method has been proposed in which the flanges are joined to both sides of the hub by snap fitting. However, in joining by snap fitting, the clearance of the fitting portion is required due to the structure, and fixing of the parts after joining is not possible. There is a problem that the shape accuracy of the entire reel is inferior.

  Thus, if the reel shape accuracy is not sufficient, the reel rotation accuracy also decreases, the tape running becomes unstable, the recording signal reading accuracy and recording accuracy by the drive head also decreases, and the recording signal reading error and Cause recording errors.

  The present invention solves the above-described problems, and provides a three-piece type reel in which the shape accuracy of each part is high, and a method for efficiently manufacturing the tape reel and the tape reel with improved shape accuracy of the entire reel. Is.

The tape reel of the present invention includes a disc-shaped first flange having an opening in the central portion, a cylindrical hub, and a disc-shaped second flange having an opening in the central portion. The flange and the second flange are each a three-piece type tape reel that is joined to both sides of the hub and projects radially from the outer periphery of the hub. A first pedestal that receives one flange and a second pedestal that receives the second flange. The second flange includes a convex-shaped joining rib on a lower surface thereof, and The pedestal includes a concave-shaped joining groove that can be fitted to the joining rib of the second flange on the upper surface thereof, and the outer periphery of the first pedestal and the outer periphery of the second pedestal are respectively rotated by a reel. On different concentric circles as seen from the axial direction Position and, and the upper surface of said the upper surface of the first seat second seat is arranged facing the same direction, said first flange is joined to the first pedestal, the second flanges, by fitting the joining rib of the second flange to the joint groove of the second seat, characterized in that it is joined to the second seat.

The tape reel manufacturing method of the present invention includes a disk-shaped first flange having an opening in the center, a cylindrical hub, and a disk-shaped second flange having an opening in the center. The first flange and the second flange are joined to both sides of the hub and project radially from the outer periphery of the hub, and the hub receives the first flange on the outer periphery. 1 pedestal and a second pedestal for receiving the second flange, the second flange having a convex-shaped joining rib on its lower surface, and the second pedestal on its upper surface. And a recess-shaped joining groove that can be fitted to the joining rib of the second flange, and the outer periphery of the first pedestal and the outer periphery of the second pedestal are different from each other when viewed from the rotation axis direction of the reel. Located on concentric circles and above the first pedestal And wherein the upper surface of the second seat, a manufacturing method of a three-piece type reel tape disposed respectively facing the same direction, and joining the first flange to said first seat And a step of fitting a joining rib of the second flange into a joining groove of the second pedestal and joining the second flange to the second pedestal.

  According to the reel for tape of the present invention, since the shape accuracy of the reel is high, the rotation accuracy of the reel can be improved and the running stability of the tape can be improved.

  Moreover, according to the method for manufacturing a tape reel of the present invention, the tape reel of the present invention can be efficiently manufactured with simple equipment.

  The tape reel of the present invention is a three-piece type, and includes a disk-shaped first flange having an opening at the center, a cylindrical hub, and a disk-shaped second flange having an opening at the center. The first flange and the second flange are joined to both sides of the hub, respectively, and project radially from the outer periphery of the hub. By using a three-piece type reel, the shape accuracy of each part can be improved.

  In addition, the hub includes a first pedestal that receives the first flange and a second pedestal that receives the second flange on an outer periphery thereof, and the outer periphery of the first pedestal and the outer periphery of the second pedestal are The upper surface of the first pedestal and the upper surface of the second pedestal are arranged in the same direction, and are located on different concentric circles as viewed from the rotation axis direction of the reel. As a result, the first flange and the second flange can be joined to the hub from the same direction (uniaxial direction), and the hub and reel joining device can be simplified.

Further, the first flange is joined to the first pedestal, and the second flange is joined to the second pedestal. As a result, the hub and the flange can be joined by ultrasonic welding, caulking , adhesion by an adhesive member, etc., a plurality of parts can be fixed and joined with high accuracy, and the shape accuracy of the entire reel after joining each part can also be improved. . However, the joining means between the hub and the flange is not limited to these, and other joining means may be used as long as a plurality of parts can be fixed and joined with good shape accuracy.

  The tape reel of the present invention can be applied not only to a single reel type tape cartridge but also to a double reel type tape cartridge. Further, not only a reel for a tape cartridge but also a reel on the drive side. Applicable.

On the other hand, the tape reel manufacturing method of the present invention is the tape reel manufacturing method of the present invention, wherein the step of joining the first flange to the first pedestal and the second flange to the second Joining the pedestal. Accordingly, as described above, the first flange and the second flange can be joined to the hub from the same direction (uniaxial direction), and a reel with high shape accuracy can be efficiently manufactured. The method for joining the hub and the flange is not particularly limited. However, if it is a method such as ultrasonic welding, caulking , or adhesion using an adhesive member, a plurality of parts can be fixed and joined with high accuracy, and the reel after joining the parts. Overall shape accuracy can also be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1A is a plan view showing an example of a first flange used in the tape reel of the present invention, and FIG. 1B is a cross-sectional view taken along the line II of FIG. 1A. As shown in FIGS. 1A and 1B, the first flange 10 is formed in a disk shape having an opening 11 at the center thereof. FIG. 1C is a partially enlarged view of FIG. 1B. As shown in FIG. 1C, the first flange 10 includes a joining rib 12 on the inner periphery thereof. A welding projection 13 is provided at the tip of the joining rib 12. Further, the first flange 10 includes a rib 14 on the inner circumference on the side opposite to the joining rib 12. As the material of the first flange 10, a resin can be used. In this case, since the first flange 10 has a substantially flat disk shape, the resin can be flowed with a uniform internal pressure during the injection molding, and the shape of the first flange 10 can be accurately formed. Note that the material of the first flange 10 is not limited to resin as long as it can be joined to other components.

  2A is a plan view showing an example of a second flange used in the tape reel of the present invention, and FIG. 2B is a cross-sectional view taken along the line II-II in FIG. 2A. As shown in FIGS. 2A and 2B, the second flange 20 is formed in a disk shape having an opening 21 at the center thereof. FIG. 2C is a partially enlarged view of FIG. 2B. As shown in FIG. 2C, the second flange 20 includes a joining rib 22 on the inner periphery thereof. A welding protrusion 23 is provided at the tip of the joining rib 22. As the material of the second flange 20, a resin can be used. In this case, since the second flange 20 has a substantially flat disk shape, the resin can be flowed with a uniform internal pressure during injection molding, and the shape of the second flange 20 can be formed with high accuracy. Note that the material of the second flange 20 is not limited to resin as long as it can be joined to other components.

  3A is a plan view showing an example of a hub used in the tape reel of the present invention, FIG. 3B is a side view thereof, and FIG. 3C is a cross-sectional view taken along line III-III in FIG. 3A. As shown in FIGS. 3A to 3C, the hub 30 is formed in a bottomed cylindrical shape. Further, the hub 30 has, on its outer periphery, a first pedestal 31 that receives the first flange 10 (FIG. 1) and a second pedestal 32 that receives the second flange 20 (FIG. 2). I have. Further, the outer periphery 31a of the first pedestal 31 and the outer periphery 32a of the second pedestal 32 are located on different concentric circles when viewed from the direction of the rotation axis 33 of the reel, and the outer diameter of the first pedestal 31 is The outer diameter of the second pedestal 32 is set smaller. Furthermore, the upper surface 31b of the first pedestal 31 and the upper surface 32b of the second pedestal 32 are directed in the same direction (upward in FIG. 3). 3D and 3E are partially enlarged views of FIG. 3C, respectively. As shown in FIG. 3D, the first pedestal 31 includes a joining groove 34, and as illustrated in FIG. 3E, the second pedestal 32 includes a joining groove 35. As the material of the hub 30, a resin can be used. In this case, since the hub 30 does not have a flange portion, the resin can be flowed with a uniform internal pressure during injection molding, and the shape of the hub 30 can be accurately formed, compared to a conventional flanged hub. It is. Note that the material of the hub 30 is not limited to resin as long as it can be joined to other components.

  FIG. 4A is a cross-sectional view showing an example of the tape reel of the present invention. As shown in FIG. 4A, the reel 40 is formed by joining the first flange 10, the second flange 20, and the hub 30 described with reference to FIGS. 4B and 4C are partially enlarged views of FIG. 4A, respectively. As shown in FIG. 4B, the joining rib 12 of the first flange 10 is joined to the joining groove 34 of the first pedestal 31 by ultrasonic welding described later, and as shown in FIG. The joining rib 22 is joined to the joining groove 35 of the second pedestal 32 by ultrasonic welding described later.

  Next, a method for manufacturing the tape reel of this embodiment will be described. FIG. 5A is a cross-sectional view showing an example of a process of joining the hub and the second flange, and FIG. 5B is a partially enlarged view of FIG. 5A. 6A is a cross-sectional view illustrating an example of a process of joining the hub and the first flange, and FIG. 6B is a partially enlarged view of FIG. 6A. In FIGS. 5 and 6, the sections other than the hub and the flange are not shown in cross section.

  First, as shown in FIGS. 5A and 5B, after fixing the hub 30 to the convex receiving jig 50, the second flange 20 is disposed on the second pedestal 32 from above, and the second flange 20. The joining rib 22 is inserted into the joining groove 35 of the second pedestal 32. Next, the 1st welding horn 51 is arrange | positioned on the opposite side to the joining rib 22 of the 2nd flange 20, and a junction part is clamped with the 1st welding horn 51 and the receiving jig 50. FIG. Finally, an ultrasonic wave is applied to the joint portion by the first welding horn 51 to melt the welding protrusion 23 of the joining rib 22 and weld the joining rib 22 and the joining groove 35. By this first step, the second flange 20 can be joined and fixed to the hub 30 with good shape accuracy.

  Next, as shown in FIGS. 6A and 6B, the first flange 10 is disposed on the first pedestal 31 from above, and the joining rib 12 of the first flange 10 is joined to the joining groove of the first pedestal 31. 34. Next, the second welding horn 52 is disposed on the rib 14 of the first flange 10, and the joint portion is sandwiched between the second welding horn 52 and the receiving jig 50. Finally, ultrasonic waves are applied to the joint portion by the second welding horn 52 to melt the welding protrusion 13 of the joining rib 12 and weld the joining rib 12 and the joining groove 34. By this second step, the first flange 10 can be joined and fixed to the hub 30 with good shape accuracy.

  In the manufacturing method of the present embodiment, the first flange 10 and the second flange 20 can be arranged on the hub 30 from the same direction, so that the first flange 10 and the second flange 20 can be obtained without reversing the hub 30. Can be joined, the joining device can be simplified, and the joining process can be made more efficient.

  Further, in the first step and the second step, the loss of welding energy is suppressed by sandwiching the joint portion between the first and second welding horns 51 and 52 and the receiving jig 50, Welding accuracy can be improved. In addition, as the 1st welding horn 51 and the 2nd welding horn 52, you may use a common horn by the 1st process and the 2nd process.

(Embodiment 2)
FIG. 7A is a cross-sectional view showing another example of the tape reel of the present invention. As shown in FIG. 7A, the reel 60 is formed by joining the first flange 15, the second flange 20, and the hub 36. The first flange 15 is formed in a disk shape having an opening at the center thereof, and includes a through-hole 16 for caulking on the inner periphery thereof. Moreover, since the 2nd flange 20 is the structure similar to what was used in Embodiment 1, below, the same code | symbol is attached | subjected to the same part and the description is abbreviate | omitted. Further, the hub 36 has the same configuration as the hub 30 of the first embodiment except that a caulking boss 37 is provided instead of the joining groove 34 (FIG. 3). The description is omitted.

7B and 7C are partially enlarged views of FIG. 7A, respectively. As shown in FIG. 7B, the first flange 15 is joined to the first base 31 of the hub 36 by caulking through a caulking boss 37, and as shown in FIG. 7C, the joining rib of the second flange 20 is joined. 22 is joined to the joining groove 35 of the second pedestal 32 by ultrasonic welding as in the first embodiment. In this embodiment, the reason why only the first flange 15 is joined by caulking is that the caulking boss 37 does not affect the winding surface of the tape even if the first flange 15 is joined by caulking. Conversely, when the second flange 20 is joined by caulking , the caulking boss protrudes from the tape winding surface, thereby hindering tape winding.

The tape reel 60 according to the present embodiment has substantially the same configuration as the tape reel 40 according to the first embodiment except that the first flange 15 and the hub 36 are joined by caulking , and has the same effects. Further, in the manufacturing method of the tape reel 60 of the present embodiment, the first flange 15 and the second flange 20 can be disposed on the hub 36 from the same direction. 15 and the second flange 20 can be joined, the joining device can be simplified, and the joining process can be made more efficient.

(Embodiment 3)
FIG. 8A is a cross-sectional view showing still another example of the tape reel of the present invention. As shown in FIG. 8A, the reel 70 is formed by joining a first flange 80, a second flange 25, and a hub 30. The first flange 80 is formed in a disk shape having an opening at the center thereof, and includes a rib 81 on the inner periphery thereof. Further, the second flange 25 has the same configuration as the second flange 20 of the first embodiment except that the joining rib 22 (FIG. 2) is not provided, and thus the description thereof is omitted. Furthermore, since the hub 30 has the same configuration as that used in the first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

  8B and 8C are partially enlarged views of FIG. 8A, respectively. As shown in FIGS. 8B and 8C, the bonding groove 34 and the bonding groove 35 of the hub 30 are respectively filled with an adhesive 82, and the first flange 80 is attached to the first base 31 of the hub 30. The second flange 25 is joined to the second pedestal 32 of the hub 30 with an adhesive 82. The adhesive 82 is not particularly limited, and an ultraviolet curable resin or the like can also be used.

  The tape reel 70 of the present embodiment has substantially the same configuration as that of the tape reel 40 of the first embodiment except that the first flange 80 and the second flange 25 and the hub 30 are joined by an adhesive 82. There is the same effect. Further, in the manufacturing method of the tape reel 70 according to the present embodiment, the first flange 80 and the second flange 25 can be arranged on the hub 30 from the same direction. 80 and the second flange 25 can be joined, the joining device can be simplified, and the joining process can be made more efficient.

  As described above, since the reel for tape of the present invention has high shape accuracy of the reel, the rotation accuracy of the reel can be improved, the running stability of the tape can be improved, and the performance of the tape cartridge can be improved.

  In addition, the method for producing a tape reel of the present invention can efficiently produce the tape reel of the present invention with simple equipment, and its industrial value is great.

1A is a plan view showing an example of a first flange used in the tape reel of the present invention, FIG. 1B is a cross-sectional view taken along the line II of FIG. 1A, and FIG. 1C is a partially enlarged view of FIG. 1B. . 2A is a plan view showing an example of a second flange used in the tape reel of the present invention, FIG. 2B is a sectional view taken along line II-II in FIG. 2A, and FIG. 2C is a partially enlarged view of FIG. 2B. . 3A is a plan view showing an example of a hub used in the tape reel of the present invention, FIG. 3B is a side view thereof, FIG. 3C is a cross-sectional view taken along line III-III of FIG. 3A, and FIGS. 3D and 3E are 3C is a partially enlarged view of FIG. 3C. 4A is a sectional view showing an example of the tape reel of the present invention, and FIGS. 4B and 4C are partially enlarged views of FIG. 4A. FIG. 5A is a cross-sectional view showing an example of a process of joining the hub and the second flange, and FIG. 5B is a partially enlarged view of FIG. 5A. FIG. 6A is a cross-sectional view illustrating an example of a process of joining the hub and the first flange, and FIG. 6B is a partially enlarged view of FIG. 6A. 7A is a cross-sectional view showing another example of the tape reel of the present invention, and FIGS. 7B and 7C are partially enlarged views of FIG. 7A, respectively. FIG. 8A is a sectional view showing still another example of the tape reel of the present invention, and FIGS. 8B and 8C are partially enlarged views of FIG. 8A. It is sectional drawing of the conventional reel for magnetic tapes. FIG. 10 is a cross-sectional view of a state where the tape is wound around the magnetic tape reel of FIG. 9. FIG. 11A is a plan view of a hub used for a conventional magnetic tape reel, and FIG. 11B is a side view thereof.

Explanation of symbols

10, 15, 80 First flange 11, 21 Opening 12, 22 Joining rib 13, 23 Welding projection 14, 81 Rib 16 Through hole 20, 25 Second flange 30, 36 Hub 31 First pedestal 32 Second Base 31a, 32a Outer periphery 31b, 32b Upper surface 33 Reel rotating shaft 34, 35 Joining groove 40, 60, 70 Reel 50 Receiving jig 51 First welding horn 52 Second welding horn 37 Caulking boss 82 Adhesive

Claims (9)

A disk-shaped first flange having an opening in the center, a cylindrical hub, and a disk-shaped second flange having an opening in the center;
Each of the first flange and the second flange is a three-piece type tape reel that is joined to both sides of the hub and projects radially from the outer periphery of the hub,
The hub includes a first pedestal for receiving the first flange and a second pedestal for receiving the second flange on an outer periphery thereof,
The second flange includes a convex-shaped joining rib on its lower surface,
The second pedestal includes a recess-shaped joining groove that can be fitted to the joining rib of the second flange on the upper surface thereof,
The outer periphery of the first pedestal and the outer periphery of the second pedestal are positioned on different concentric circles when viewed from the rotation axis direction of the reel, and the upper surface of the first pedestal and the upper surface of the second pedestal Are arranged in the same direction,
The first flange is joined to the first pedestal ;
Said second flange, the first by the second flange joining ribs be fitted to the joint groove of the second seat, the tape reel, characterized in that it is joined to the second seat. The outer diameter of the first pedestal is smaller than the outer diameter of the second pedestal,
The first flange includes a convex-shaped joining rib on its lower surface ,
The first pedestal includes, on the upper surface thereof, a recess-shaped joint groove that can be fitted to the joint rib of the first flange .
The joining rib of the first flange is joined to the joining groove of the first pedestal by ultrasonic welding,
The reel for tape according to claim 1, wherein the joining rib of the second flange is joined to the joining groove of the second pedestal by ultrasonic welding.   The tape reel according to claim 2, wherein the joining rib of the first flange and the joining rib of the second flange are each provided with a welding projection at the tip thereof. The outer diameter of the first pedestal is smaller than the outer diameter of the second pedestal,
The first flange and the first pedestal are joined by caulking ,
The reel for tapes according to claim 1 in which said 2nd flange and said 2nd base are joined by ultrasonic welding. The outer diameter of the first pedestal is smaller than the outer diameter of the second pedestal,
The first flange is joined to the first pedestal by an adhesive member;
The tape reel according to claim 1, wherein the second flange is joined to the second pedestal by an adhesive member. A disk-shaped first flange having an opening in the center, a cylindrical hub, and a disk-shaped second flange having an opening in the center;
The first flange and the second flange are respectively joined to both sides of the hub, and project radially from the outer periphery of the hub;
The hub includes a first pedestal for receiving the first flange and a second pedestal for receiving the second flange on an outer periphery thereof,
The second flange includes a convex-shaped joining rib on its lower surface,
The second pedestal includes a recess-shaped joining groove that can be fitted to the joining rib of the second flange on the upper surface thereof,
The outer periphery of the first pedestal and the outer periphery of the second pedestal are positioned on different concentric circles when viewed from the rotation axis direction of the reel, and the upper surface of the first pedestal and the upper surface of the second pedestal Is a method of manufacturing a three-piece type tape reel that is arranged in the same direction,
Joining the first flange to the first pedestal;
A tape reel comprising: a step of fitting a joining rib of the second flange into a joining groove of the second pedestal, and joining the second flange to the second pedestal. Method. The outer diameter of the first pedestal is smaller than the outer diameter of the second pedestal,
The first flange includes a convex-shaped joining rib on its lower surface ,
The first pedestal includes, on the upper surface thereof, a recess-shaped joint groove that can be fitted to the joint rib of the first flange .
Joining the joining rib of the first flange to the joining groove of the first pedestal by ultrasonic welding;
The manufacturing method of the reel for tapes of Claim 6 which joins the joining rib of the said 2nd flange to the joining groove | channel of the said 2nd base by ultrasonic welding. The outer diameter of the first pedestal is smaller than the outer diameter of the second pedestal,
Joining the first flange and the first pedestal by caulking ;
The manufacturing method of the reel for tapes of Claim 6 which joins a said 2nd flange and a said 2nd base by ultrasonic bonding. The outer diameter of the first pedestal is smaller than the outer diameter of the second pedestal,
Bonding the first flange and the first pedestal by an adhesive member;
The method for manufacturing a reel for tape according to claim 6, wherein the second flange and the second pedestal are joined by an adhesive member.

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