JP2007299488A - Tape reel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tape reel which prevents a tape from running onto a flange or being folded, even if the adhering position of the tape shifts a little from a center position in a width direction of a winding core and maintains quality of the tape. <P>SOLUTION: The tape reel 1 has a cylindrical winding core 11 on which the magnetic tape is wound; and a pair of flanges 12 and 13 prepared at both widthwise ends of this winding core 11, and it is constituted so that concave portions 14 recessed in a thickness direction are prepared annularly along the edges of the winding core 11 in at least one side of inner surface 12a and 13a among a pair of flanges 12 and 13. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a tape reel with a flange, and more particularly to a tape reel that reduces the occurrence of defective tapes due to a deviation of the tape application position with respect to a core.

  Generally, a magnetic tape cartridge is known as an external recording medium for data backup such as a computer. The magnetic tape cartridge is configured by accommodating a single reel for winding a magnetic tape in a cartridge case. In such a magnetic tape cartridge manufacturing process, after a tape reel is assembled in the cartridge case, the tip of the magnetic tape is attached to the winding core, and a predetermined amount of the magnetic tape is wound as it is. (For example, refer to Patent Documents 1 and 2). Conventionally, various apparatuses for manufacturing a magnetic tape cartridge for attaching a magnetic tape to a winding core have been proposed.

  Patent Documents 1 and 2 describe a magnetic tape cartridge manufacturing apparatus. 5A and 5B are a front view (left side) and a side view (right side) for explaining a conventional method of manufacturing a magnetic tape cartridge. FIG. 5A shows a state in which a liquid is applied to the core, and FIG. (C) shows the time of winding the magnetic tape around the core. FIG. 6 is a half side view of a conventional tape reel on which a magnetic tape is wound. As shown in FIG. 5A, when a magnetic tape cartridge is manufactured, a transport means (hereinafter referred to as “finger arm 100”) that can be moved forward and backward in the cartridge case is used. The finger arm 100 has a sponge-like application body 101 containing an application liquid (for example, alcohol) at the tip, and is connected to an external negative pressure source or high pressure source on the rear side. It has a through hole (not shown). By switching the switching valve, the connection destination of the through hole is changed to a negative pressure source or a high pressure source, and the magnetic tape is attracted or floated.

With this finger arm 100, the magnetic tape cartridge is manufactured as follows. (1) First, as shown in FIG. 5A, the tape reel 111 is set inside the cartridge case 110. (2) As shown in FIG. 5A, the front end MTa of the magnetic tape MT is attracted to the finger arm 100. (3) In this state, the finger arm 100 is inserted into the cartridge case 110 and the application body 101 is brought into contact with the surface of the core 112 of the tape reel 111. Thereby, the coating liquid is applied to the surface of the core 112. (4) Then, as shown in FIG. 5B, the tip portion MTa of the magnetic tape MT is levitated from the finger arm 100 at a position where the finger arm 100 is further advanced. Thereby, the magnetic tape MT is affixed on the surface of the core 112 to which the liquid is applied. (5) Then, as shown in FIG. 5C, the tape reel 111 is rotated to wind the magnetic tape MT.
Japanese Patent Laying-Open No. 2005-259273 (paragraphs 0003 to 0010, FIG. 10) Japanese Patent Laying-Open No. 2005-322353 (paragraphs 0029 to 0031, FIG. 3)

  However, when the position where the magnetic tape MT is attached to the core 112 is deviated from the center position in the width direction of the core 112, the edge MTed of the magnetic tape MT is shifted to the flange of the tape reel 111 as shown in FIG. As shown in FIG. 6B, the tip portion MTa of the magnetic tape MT is broken as shown in FIG. If the magnetic tape MT is continuously wound around the core 112 in such a state, a gap is formed between the wound magnetic tapes MT, and the wound magnetic tape MT is deformed. Such deformation of the magnetic tape MT affects the clearance between the magnetic tape MT and the magnetic head of the recording / reproducing apparatus, and induces magnetic signal writing failure, thereby deteriorating the commercial value of the magnetic tape cartridge. There was a problem.

  In recent years, the magnetic tape MT itself has become weaker because the magnetic tape MT has become thinner (9 μm → 6 μm) as the capacity of the magnetic tape increases. As a result, the portion that protrudes due to the turbulence of the magnetic tape MT in the tape reel 111 is easily broken by an external force, so that the interval between the flanges 113 of the tape reel 111 tends to be narrowed. As described above, there is a concern that the distance between the flanges 113 and 113 becomes narrower, so that the magnetic tape MT gets on the flange 113 and is further bent.

  Therefore, in the present invention, the above-described problems are solved, and even when the tape application position is slightly deviated from the center position in the width direction of the winding core, the tape can be prevented from getting on the flange and the tape can be bent. It is an object to provide a tape reel that maintains quality.

  In order to solve the above problems, the invention according to claim 1 is a tape reel having a cylindrical core around which a tape is wound, and a pair of flanges provided at both ends in the width direction of the core, The inner surface of at least one of the pair of flanges is provided with a recess recessed in the thickness direction in an annular shape along the end of the core.

  According to the first aspect of the present invention, when the tape is attached to the winding core, the tape application position shifts from the central position in the width direction of the winding core and approaches the flange side where the recess is formed. Enters the recess of the flange. Thus, by expanding the area where the tape can be applied as compared with the conventional case, it is possible to prevent the edge of the tape from riding on the flange and the tape from being broken. Therefore, when winding the tape, deformation of the wound tape can be prevented, and the quality of the tape can be maintained.

  According to a second aspect of the present invention, in the tape reel according to the first aspect, the concave portions are respectively provided on the inner surfaces of the pair of flanges.

  According to the second aspect of the present invention, when the tape is attached to the core, the tape attachment position is shifted from the center position in the width direction of the core, and even if it is closer to either flange side, The edge enters the recess of the flange on which it approaches. Thus, by expanding the area where the tape can be applied more than before, it is possible to reliably prevent the edge of the tape from riding on the flange and the tape from being broken. Therefore, when winding the tape, deformation of the wound tape can be prevented, and the quality of the tape can be reliably maintained.

  The invention according to claim 3 is the tape reel according to claim 1 or 2, wherein the tape reel is a tape reel of a magnetic tape, and the depth of the recess is 0.2 mm or less. Features.

  According to the invention which concerns on Claim 3, the area | region which can affix a tape in the vicinity of a core is ensured moderately, ensuring the moderate intensity | strength of a flange by making the depth of a recessed part 0.2 mm or less. be able to. In the conventional tape reel, the width of the magnetic tape is 12.65 mm, and the flange interval in the vicinity of the core is 13.1 mm. When the tape is attached to the core, the range is 0.45 mm. There was only room for. Therefore, it is necessary to make the magnetic tape sticking accuracy within ± 0.2 mm. However, according to the present invention, the margin can be expanded to 0.4 mm or less with one flange and 0.8 mm or less with a range.

  According to a fourth aspect of the present invention, in the tape reel according to any one of the first to third aspects, the concave portion has a width of 15 mm or less in a radial direction from the winding core.

  According to the invention of claim 4, by making the width of the recess 15 mm or less, the distance between both flanges on the outside in the radial direction is ensured as before, and the tape is prevented from being distorted by the position restriction by the flange. It is. Normally, the winding speed of the tape becomes high after starting to accelerate, and then decelerates. Since winding of the tape is likely to occur at a high speed stage, the distance between both flanges on the outside in the radial direction (the tape winding speed is at a high speed stage) should be kept within the range of 15 mm or less from the winding core (the initial stage of acceleration). A recess is formed inside.

  According to a fifth aspect of the present invention, in the tape reel according to any one of the first to fourth aspects, the concave portion includes a side surface portion formed flush with the winding core, and a deepest depth of the side surface portion. A bottom surface portion that continues from the portion to the inner surface of the flange, and at least a part of the bottom surface portion is provided with an inclined portion that is inclined toward the inner surface side from the deepest portion side of the side surface portion. And

  According to the invention which concerns on Claim 5, a steep level | step difference can be prevented from being formed in a bottom face part by providing an inclined part in a bottom face part. Thereby, the damage of the tape edge by a level | step difference can be prevented.

  The invention according to claim 6 is the tape reel according to claim 5, wherein the inclined portion has an inclination angle of 30 ° or less.

  According to the invention which concerns on Claim 6, it can prevent damage to the edge of a tape by making an inclination part become 30 degrees or less so that an inclination part does not become a steep inclination.

  According to such a tape reel, even when the tape application position is slightly deviated from the center position in the width direction of the core, the tape can be prevented from running on the flange and the tape can be bent to maintain the quality of the tape. be able to.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is an exploded perspective view of a tape reel according to the present embodiment. 2A is a half sectional view of the tape reel, and FIG. 2B is an enlarged view of a portion B in FIG. In this embodiment, the case where the tape reel according to the present invention is applied to a tape reel of a magnetic tape will be described. The tape reel according to the present invention is not limited to a tape reel of a magnetic tape, and can be applied as a tape reel for winding any tape.

  The tape reel according to the present embodiment is a component constituting a magnetic tape cartridge, and is rotatably assembled in a cartridge case. As shown in FIG. 1, the tape reel 1 includes a winding core 11 around which a magnetic tape is wound, a first flange 12 welded to one end in the width direction of the winding core 11, and the width of the winding core 11. The second flange 13 is formed integrally with the core 11 at the other end in the direction.

  The winding core 11 includes a cylindrical outer peripheral wall 11a around which a magnetic tape is wound, a substantially columnar central portion 11b disposed inside the outer peripheral wall 11a, and a space between the outer peripheral wall 11a and the central portion 11b. And a plurality of auxiliary ribs 11c extending in the radial direction. A pivot 11d is provided at the center of the end surface of the central portion 11b, and a plurality of welding bosses 11e are provided around the pivot 11d. The first flange 12 is welded to the core 11 by being melted by an ultrasonic horn in a state where the pivot 11d and the welding boss 11e are fitted and inserted into the through holes 12d and 12e formed in the first flange 12. The

  The first flange 12 and the second flange 13 are formed in a disc shape. As shown in FIG. 2, the first flange 12 and the second flange 13 are formed so that the inner surfaces 12a and 13a are inclined so as to be separated from each other toward the outer side in the radial direction. It is designed to prevent contact of the tape edge.

  Further, in each inner surface 12a, 13a of the first flange 12 and the second flange 13, a recess 14 that is recessed in the thickness direction is formed annularly along the end of the core 11 (see FIG. 1). As shown in FIG. 2A, the recess 14 is formed in the same shape in each of the flanges 12 and 13 and will be described below with reference to the recess 14 on the first flange 12 side. In addition, since the 2nd flange 13 is integrally formed with the core 11, the boundary is unclear, but let the 2nd flange 13 be a part of the substantially same shape as the 1st flange 12. FIG.

  As shown in FIG. 2B, the concave portion 14 includes a side surface portion 14a formed flush with the core 11, a flat surface portion 14b orthogonal to the deepest portion a of the side surface portion 14a, and an inner surface from the flat surface portion 14b. And an inclined portion 14c inclined toward 12a. In addition, the plane part 14b and the inclination part 14c in this embodiment are corresponded to the "bottom part" of [Claims].

  The side surface portion 14 a is a surface for ensuring the depth of the recess 14. The depth D of the side surface portion 14a is set to 0.2 mm. Conventionally, the accuracy of attaching the magnetic tape MT with a tape width of 12.65 mm to the core with a width of 13.1 mm (shaft length) was only ± 0.2 mm in the range, so the range was doubled. In order to ensure ± 0.4 mm, the depth D is 0.2 mm. The depth D is not limited, but is preferably 0.2 mm or less. This is because if the depth D is too deep, the first flange 12 becomes thin and the strength deteriorates.

  The flat surface portion 14 b is a surface orthogonal to the core 11. In order to prevent the edge of the magnetic tape from climbing on the flat portion 14b or being bent (see FIG. 5) due to the blurring of the winding position when the magnetic tape starts to be wound around the core 11, the core 11 is prevented. The flat portion 14b is provided in the vicinity of the flat portion 14b, and the distance between the flanges 12 and 13 is kept constant within the range of the flat portion 14b.

  The inclined portion 14 c is a surface that causes the flat portion 14 a to continue to the inner surface 12 a of the first flange 12. The inclination angle θ formed by the extended line of the inclined part 14c and the flat part 14b was set to 30 °. In this way, the inclined portion 14 c is smoothly continued to the inner surface 12 a of the first flange 12, so that a steep step is not formed in the recess 14. This is because when a steep step is formed, the edge of the magnetic tape may be caught and damaged. In addition, although inclination-angle (theta) is not limited, It is preferable to set it as 30 degrees or less. This is because if the inclination angle θ is too steep, the edge of the magnetic tape is likely to be damaged due to the blur at the winding position when the magnetic tape starts to be wound around the core 11.

  Thus, the width W of the concave portion 14 formed of the side surface portion 14a, the flat surface portion 14b, and the inclined portion 14c is set to 15 mm, and is preferably 15 mm or less. By setting in this way, the distance between the flanges 12 and 13 on the outer side in the radial direction is ensured as before, and the position restriction by the flanges 12 and 13 prevents the winding disturbance when winding the magnetic tape. be able to. Incidentally, the winding speed of the magnetic tape usually increases after starting gradually accelerating, and then decelerates. However, the magnetic tape winding is likely to occur at a high speed stage. In order to prevent this winding disturbance, the distance between the flanges 12 and 13 on the outer side in the radial direction (the winding speed of the magnetic tape is at a high speed stage) is ensured as before.

Next, a case where a magnetic tape is wound around the tape reel 1 configured as described above will be described. FIG. 3 is a half sectional view of a tape reel on which a magnetic tape is wound.
First, the tip portion MTa of the magnetic tape MT is attached to the core 11 using the finger arm 100 shown in FIG. At this time, as shown in FIG. 3, the sticking position of the leading end portion MTa of the magnetic tape MT is shifted in the width direction from the center position C in the width direction of the core 11, and approaches the first flange 12 side. However, since the edge MTed of the magnetic tape MT enters the recess 14, it does not come into contact with the first flange 12. As a result, it is possible to prevent the magnetic tape MT from riding on the first flange 12 and the magnetic tape MT from being broken.

According to the above, the following effects can be obtained in the present embodiment.
In the tape reel 1 according to the present embodiment, the concave portions 14 are provided in the flanges 12 and 13, and the area to which the magnetic tape MT can be attached is secured wider than in the prior art. It is possible to prevent the magnetic tape MT from getting on the flanges 12 and 13 and from being broken by contacting the flanges 12 and 13. Thereby, when winding the magnetic tape MT around the core 11, it is possible to prevent deformation of the wound magnetic tape MT and maintain the quality of the magnetic tape MT.

  In particular, even when the distance between the first flange 12 and the second flange 13 is reduced with the thinning of the magnetic tape MT, the concave portion 14 is provided so that the magnetic tape MT is attached. The possible area can be made larger than the width of the core 11.

  Although the present embodiment has been described above, the tape reel of the present invention is not limited to the tape reel according to the embodiment, and can be implemented in various forms.

FIG. 4 is a view showing a modification of the concave portion of the tape reel of the present embodiment, where (a) is a first modification, (b) is a second modification, and (c) is a third modification. (D) is a figure which shows the 4th modification.
In the said embodiment, although the recessed part 14 was formed from the side part 14a, the plane part 14b, and the inclination part 14c, the recessed part of this invention is not limited. For example, as shown in FIG. 4A, the concave portion 14A is continuously inclined with respect to the side surface portion 14a formed flush with the core 11, and from the side surface portion 14a toward the inner surface 12a of the first flange 12. You may comprise from the bottom face part 14d (inclination part). Further, as shown in FIG. 4B, the concave portion 14B is continuously formed in a curved surface from the side surface portion 14a formed flush with the winding core 11 toward the inner surface 12a of the first flange 12 from the side surface portion 14a. You may comprise from the bottom face part 14e. Further, as shown in FIG. 4C, the concave portion 14C is configured by a bottom surface portion 14f formed in a curved shape in the opposite direction to the bottom surface portion 14e, instead of the bottom surface portion 14e in the second modification. May be. Moreover, as shown in FIG.4 (d), it may comprise in the recessed part 14D by the bottom face part 14g formed in S shape instead of the bottom face part 14e in the said 2nd modification.

  In the above embodiment, in the tape reel 1, the concave portions 14 are provided in both the first flange 12 and the second flange 13. However, the tape reel of the present invention is not limited, and one flange 12 (or 13) is provided. It may be provided only for. In this case, the concave portion may be provided on the flange on which the finger arm 100 is likely to move more easily.

  In the above embodiment, the tape reel is configured by welding the first flange 12 to the core 11 in which the second flange 13 is integrated. However, the tape reel of the present invention is not limited, and the second The flange 13 may be a tape reel that is welded to the core 11 as a separate part.

FIG. 1 is an exploded perspective view of a tape reel according to the present embodiment. (A) is a half cross-sectional view of the tape reel, and (b) is an enlarged view of a portion B in (a). It is a half sectional view of a tape reel on which a magnetic tape is wound. It is a figure which shows the modification of the recessed part of the tape reel of this embodiment, (a) is a 1st modification, (b) is a figure which shows a 2nd modification, (c) is a 3rd modification, (D) is a fourth modification. It is the front view (left side) and side view (right side) explaining the manufacturing method of the conventional magnetic tape cartridge, (a) at the time of application | coating of the liquid with respect to a core, (b) at the time of sticking of the magnetic tape with respect to a core, (C) shows the time of winding the magnetic tape around the winding core. It is a half side view of the tape reel by which the magnetic tape was wound.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tape reel 11 Core 12 1st flange 12a Inner surface 13 2nd flange 14, 14A, 14B Recessed part 14a Side surface part 14b Flat surface part 14c Inclination part C Width direction center position MT Magnetic tape MTa Tip part MTed Edge

Claims (6)

A tape reel having a cylindrical core around which a tape is wound and a pair of flanges provided at both ends in the width direction of the core,
A tape reel, wherein at least one inner surface of the pair of flanges is provided with a recess recessed in the thickness direction in an annular shape along an end of the core.   The tape reel according to claim 1, wherein the recess is provided on each inner surface of the pair of flanges.   The tape reel according to claim 1 or 2, wherein the tape reel of the magnetic tape has a depth of 0.2 mm or less.   4. The tape reel according to claim 1, wherein the concave portion has a width of 15 mm or less in a radial direction from the winding core. 5. The concave portion includes a side surface portion that is formed flush with the winding core, and a bottom surface portion that continues from the deepest portion of the side surface portion to the inner surface of the flange.
The said bottom face part has an inclined part which inclines toward the said inner surface side from the said deepest part side of the said side part at least in part, The Claim 1 characterized by the above-mentioned. Tape reel.   The tape reel according to claim 5, wherein the inclined portion has an inclination angle of 30 ° or less.

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