JPH10125039A - Method for mounting tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a tape from deforming along the outer-periphery surface of a reel hub, and to eliminate inflated shape by allowing the tape stand for a specified time while a specific tension has been applied to a tape reel at a take-up side and at least one wind is taken up. SOLUTION: Tapes are left for approximately 10 days while a magnetic tape 3 including a leader tap 3a that is the starting edge part of a magnetic tape 3 is wound for approximately 10 winds around a reel hub 2b of a take-up side tape reel 1b. In this case, since the magnetic tape 3 that is overlapped with and is wound around the reel hub 2b is pressed to one another, the magnetic tape 3 is pressed against the outer-periphery surface of the reel hub 2b, and a gap generated between the reel hub 2b and the leader tape 3a can be eliminated. Since the amount of fluctuation of the winding diameter of the tape that is taken up by a take-up side tape reel can be reduced at the time of recording and reproduction, run-out can be reduced, thus suppressing the fluctuation in the running speed of the tape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching a tape such as a leader tape provided at an end of a magnetic tape wound around a tape reel of a tape cartridge to a reel hub of the tape reel via a clamp member. The present invention relates to a method for attaching a tape used in a method.

[0002]

2. Description of the Related Art In general, for example, a tape cartridge having a tape width of 8 mm or a digital audio tape (hereinafter, referred to as a tape cartridge).
It is called DAT. 2. Description of the Related Art In a tape cartridge such as a cartridge, a magnetic tape as a recording medium is wound around a supply-side tape reel, and is wound around the take-up side tape reel during recording and reproduction, so that the magnetic tape runs.

This tape cartridge generally comprises a magnetic tape having leader tapes at both ends, a pair of supply tape reel and take-up tape reel having a reel hub formed at the center, and an end of the leader tape. It comprises a clamp member that is sandwiched and engaged with the reel hub, and a cartridge body in which the supply-side tape reel and the take-up-side tape reel are rotatably stored.

[0004] Leader tapes are joined to both ends of the magnetic tape via a splicing tape. The reel hub has a notch formed in the outer peripheral portion thereof, and the leading end of the leader tape is sandwiched in the engaging portion to engage the clamp member. The clamp member engaged with the reel hub forms a part of the outer peripheral surface of the reel hub.

[0005] The leader tape attached to the reel hub of the tape reel via a clamp member is engaged with the reel hub in a state where it is pulled out from two places at the boundary between the reel hub and the clamp member.

In the tape cartridge constructed as described above, the magnetic tape is run by rotating the tape reel, and the recording / reproducing magnetic head of the recording / reproducing apparatus is brought into contact with the magnetic tape. Thus, recording and reproduction of information signals are performed.

The tape cartridge employs a capstan drive system and a reel drive system as a drive system for running the magnetic tape when the tape cartridge is loaded in a recording / reproducing apparatus. The capstan driving method and the reel driving method will be described with reference to FIGS. First, as shown in FIGS. 12 and 13, the supply-side tape reel 51a and the take-up-side tape reel 51b are rotatably supported by the reel hubs 52a and 52b having the recording and reproducing device-side reel shafts 55 and 55 inserted therethrough. Is done.

In the capstan driving method, as shown in FIG. 12, a magnetic tape 53 wound on a supply-side tape reel 51a and a take-up-side tape reel 51b is placed between a capstan roller 56 and a pinch roller 57. The magnetic tape 53 is conveyed and run in the rotation direction of the capstan roller 56 while being nipped.

At the same time, the capstan drive system employs a magnetic tape 53 provided by a tension arm or a chamber (not shown) for applying tension to the magnetic tape 53 wound on the supply-side tape reel 51a and the winding-side tape reel 51b. While controlling and fine-tuning the tension of 53,
The magnetic tape 53 is supplied or wound by being rotationally driven in a predetermined direction.

[0010] As shown in FIG.
The rotation speed of the supply-side tape reel 51a and the take-up-side tape reel 51b is controlled by rotating the reel shafts 55, 55 without using the capstan roller 56 and the pinch roller 57 of the above-described capstan driving method. Meanwhile, the magnetic tape 53 is supplied or wound.

The reel drive system has advantages that the structure can be simplified and the mechanism can be downsized, as compared with the capstan drive system. However, the reel drive system has the advantages of the supply side tape reel 51a and the take-up side tape reel 51b. In order to keep the running speed of the magnetic tape 53 constant according to the mutual winding state, it is necessary to accurately control the rotation speed of each of the tape reels 51a and 51b.

For this reason, in a DAT cartridge, for example, the rotation cycle of the take-up tape reel 51b is controlled so that the sum of the rotation cycles of the supply-side tape reel 51a and the take-up tape reel 51b is constant. The tape speed servo system for keeping the running speed of the magnetic tape 53 constant is used, and the running amount of the magnetic tape 53 necessary for a high-speed search operation or the like is detected by the tape speed servo system.

[0013]

However, in the reel drive system, the above-described supply-side tape reel 51a is used.
When the tape speed servo system is used to make the sum of the rotation periods of the tape reel 51b and the take-up tape reel 51b constant, the supply-side tape reel 51a and the take-up tape reel 51b There is a problem that an error occurs in the traveling speed of the magnetic tape 53 due to a change in the diameter of the wound magnetic tape 53.

In order to solve this problem, there is a proposal to control the running speed of the magnetic tape 53 based on the rotation information of the supply-side tape reel 51a and the rotation information of the take-up tape reel 51b. The change in the diameter of the magnetic tape 53 wound on the magnetic tape is not fundamentally solved.

That is, according to the tape cartridge, as shown in FIG. 14, the reel hubs 52a, 52a, 5b of the supply-side tape reel 51a and the take-up-side tape reel 51b.
The leader tape 53a locked to the 2b via the clamp member 54 has two locations 60 and 61 pulled out from the boundary between the reel hubs 52a and 52b and the clamp member 54.
It protrudes in a direction substantially perpendicular to the outer peripheral surfaces of the reel hubs 52a and 52b.

By the way, the leader tape 53a needs to have physical properties such as a breaking strength of 20N or more, a yield point load of 7.5N or more, and a light transmittance of 60%. Those having a size of 15 μm are used. The leader tape 53a is connected to the reel hub 52.
It is necessary to securely fix to the a and 52b via the clamp member 54.

Therefore, when the leader tape 53a is formed of the same material, it is desirable to increase the thickness as much as possible in consideration of mechanical strength. However, the leader tape 53a has a magnetic tape 53 having a thickness of 7 μm.
Since the thickness is large, a relatively large step is generated in the connection portion 63 with the magnetic tape 53 joined and fixed via the splicing tape 53b as shown in FIG. 14 by increasing the thickness dimension. And the leader tape is
Since a concave distortion is generated on the magnetic tape 53 sequentially stacked on the connection portion 63 having the step, a sliding error between the magnetic tape 53 and the magnetic head occurs at the time of recording / reproducing, resulting in a signal error. There is.

The leader tape 53a is provided along the outer peripheral surfaces of the reel hubs 52a and 52b because the portions 60 and 61 drawn from the boundary between the reel hubs 52a and 52b and the clamp member 54 have the above-described physical characteristics. Is difficult to bend, a gap is formed between the outer peripheral surfaces of the reel hubs 52a and 52b and the first turn of the leader tape 53a, and it is difficult to wind the reel hubs 52a and 52b in a perfect circle. was there.

Therefore, the leader tape 53a is
As shown in FIG. 14, when the reel hubs 52a and 52b are wound clockwise in FIG.
The space between the outer peripheral surface of the reel hubs 52a and 52b projects in a direction substantially perpendicular to the outer peripheral surfaces of the reel hubs 52a and 52b.
b is curved toward the outer peripheral surface side and swells outward.

That is, the leader tape 53a is
As shown in the figure, the reel hub 5 is provided at two locations 60 and 61 at the boundary between the reel hubs 52a and 52b and the clamp member 54.
The so-called run-out (R), which is projected and wound in a direction away from the rotation center of the reel hubs 52a, 52b, by the gaps S1, S2 between the outer peripheral surfaces of the reel hubs 2a, 52b.
Each of the projections has an outward projection as unout).

With respect to the leader tape 53a wound around the outer peripheral surfaces of the reel hubs 52a and 52b of the take-up side tape reel 51b, the outer periphery of the magnetic tape 53 is measured using a roundness tester for measuring the amount of variation of the curved surface. The result of measuring the amount of fluctuation of the surface will be described with reference to FIG. 16 showing a circular shape and FIG. 17 showing a linear shape.

The solid lines indicate the reel hubs 52a and 52b.
4 shows the outer peripheral surface of the magnetic tape 53 wound around the outer peripheral portion, and the vertical axis and the horizontal axis show the fluctuation amount of the outer peripheral surface of the magnetic tape 53. Therefore, the reel hub 52a,
When no fluctuation occurs on the outer peripheral surface of the magnetic tape 53 wound around the outer peripheral portion of the magnetic tape 52b, the magnetic tape 5 shown in FIG.
3 indicates a perfect circle, and in FIG. 17, the outer peripheral surface of the magnetic tape 53 indicates a straight line.

In FIG. 17, the (+) side shows a convex portion going outward of the reel hubs 52a and 52b, and the (-) side shows a concave portion going inward of the reel hubs 52a and 52b.

As shown in FIG. 16, this tape reel 5
According to 1a and 51b, a boundary portion 60 between the reel hubs 52a and 52b and the clamp member 54 is provided on the outer peripheral surface of the magnetic tape 53 wound around the outer peripheral portions of the reel hubs 52a and 52b.
61, a remarkable fluctuation occurs, and at the boundary 60,
There is a problem that a maximum variation of about 75 μm occurs.

The tape reels 51a, 51B
In the above, the leading end portion 62 of the leader tape 3a and the connecting portion 63 of the splicing tape 53b also fluctuate. In addition, as shown in FIG. 17, according to the tape reel 51b, there is a problem that the fluctuation amount becomes maximum at the boundary 60 between the reel hubs 52a and 52b and the clamp member 54.

Accordingly, the present invention provides a tape mounting method capable of reducing the amount of change in the diameter of the tape wound on a tape reel and enabling good recording and reproduction of information signals on the tape. The purpose is to provide.

[0027]

In order to achieve the above-mentioned object, a method of mounting a tape according to the present invention comprises the steps of: mounting a tape on a take-up side via a clamp member engaged with an outer peripheral portion of a reel hub of a take-up side tape reel; Used to lock and attach the end of the tape to the reel hub of the tape reel.
According to this tape mounting method, the tape is applied with a predetermined tension to the reel hub of the take-up tape reel, and
It is left for a predetermined period of time in a state where it has been wound up.

The method of mounting the tape configured as described above is based on the fact that the tape mounted on the reel hub is left for a predetermined time in a state where a predetermined tension is applied.
The tape is pressed against the outer peripheral surface of the reel hub, and the tapes wound and wound one or more times overlap each other to press each other.

That is, according to this tape mounting method, the portion of the tape pulled out from between the reel hub and the clamp member is forcibly deformed along the outer peripheral surface of the reel hub. For this reason, according to this method of mounting the tape, the so-called run-out, which is caused by the fluctuation of the diameter of the tape wound on the winding-side tape reel and is wound, is reduced, and the tape is wound on the reel hub of the winding-side tape reel. The roundness of the outer peripheral surface of the tape to be wound is improved.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings, with regard to a method of mounting a tape applied to a tape cartridge. The mounting method of this tape is a tape cartridge having a tape width of 8 mm or a DA cartridge.
Used for tape cartridges such as T cartridges.

As shown in FIGS. 1 and 2, the tape cartridge has a magnetic tape 3 having a leader tape 3a of a predetermined length at both ends, as shown in FIGS.
A pair of a supply tape reel 1a and a take-up tape reel 1b having a reel hub 2a, 2b formed at the center, and a clamp member 4a which is engaged with the reel hub 2a with the end of the leader tape 3a interposed therebetween. 4b.

The leader tape 3a is made of polyethylene terephthalate (PET) and has a thickness of 15 μm, and is provided at both ends of the magnetic tape 3 by being joined and fixed via a splicing tape (not shown).

The leader tape 3a has physical properties such as a breaking strength of 20N or more, a yield point load of 7.5N or more, and a light transmittance of about 60%. The magnetic tape 3 has a thickness of 7 μm, and the splicing tape has a thickness of 23 μm.

Each of the supply-side tape reel 1a and the take-up-side tape reel 1b has a notch formed in a part of an outer peripheral portion of each of the reel hubs 2a and 2b. The tape reels 1a, 1b are provided with a pair of reel plates 6, 6, respectively. Clamp member 4
Reference numerals a and 4b each have a substantially C-shaped cross section, and are engaged with the engaging portions 5 of the reel hubs 2a and 2b, respectively, with one end of the leader tape 3a sandwiched therebetween.

With respect to the above-described method of attaching the tape, an operation of attaching the leader tapes 3a provided at both ends of the magnetic tape 3 to the take-up tape reel 1b will be described.

First, as shown in FIG. 3, the tip of the leader tape 3a is attached to the reel hub 2b of the take-up tape reel 1b via the clamp member 4b, as shown in FIG. As shown in FIG. 3, when the leading end of the leader tape 3a is attached to the reel hub 2b of the take-up side tape reel 1b via the clamp member 4b, the leader tape 3a has two portions 1 at the boundary between the reel hub 2b and the clamp member 4b.
It is locked in a state of being pulled out from 0 and 11.

As shown in FIG. 4, after the leader tape 3a is attached to the reel hub 2b, the take-up side tape reel 1b is wound around the reel hub 2b, whereby the boundary between the reel hub 2b and the clamp member 4b is formed. The two portions 10 and 11 drawn out of are bent by being pressed by the wound leader tape 3a.

According to this tape attaching method, the leader tape 3a wound around the reel hub 2b of the take-up tape reel 1b is 45 ± 1 in the first winding.
It is wound with a tension of 0 gf.

The greater the tension applied to the leader tape 3a, the better the adhesion to the outer peripheral surface of the reel hub 2b. However, when the leader tape 3a is wound around the reel hub 2b with a large tension applied thereto, the magnetic tape 3 wound around the reel hub 2b has an adverse effect such as tape damage. And
The magnetic tape 3 suffers large tape damage in inverse proportion to the thickness dimension.

Therefore, the tension applied to the leader tape 3a cannot be increased unconditionally. Further, when the tension applied to the leader tape 3a is small and is lower than the elastic force of the leader tape 3a, the gap generated between the leader tape 3a and the reel hub 2b is not removed.

The relationship between the tension applied to the leader tape and the value of Run out will now be described with reference to FIG.

As shown in FIG. 5, the value of Run out decreases as the tension applied to the leader tape 3a increases. The value of Run out needs to be 80 μm or less, and preferably 50 μm or less, in consideration of a signal error generated at the time of recording and reproduction on the magnetic tape 3.

The value of Run out becomes 50 μm when a tension of 35 gf is applied, as shown in FIG.
It becomes 35 μm when a tension of 55 gf is applied. Therefore, the tension applied to the leader tape 3a is set to 45 ± 10 gf as described above.

Further, with respect to the leader tape 3a wound around the outer peripheral surface of the reel hub 2b of the take-up tape reel 1b, the tension applied to the leader tape 3a is 10 gf, 40 g.
The results of measuring the variation of the outer peripheral surface of the magnetic tape 3 using a roundness tester for measuring the variation of the curved surface as gf and 60 gf will be described with reference to FIGS.

The solid line indicates the outer peripheral surface of the magnetic tape 3 wound around the outer periphery of the reel hub 2b, and the vertical and horizontal axes indicate the amount of fluctuation of the outer peripheral surface of the magnetic tape 3. . Therefore, when the outer peripheral surface of the magnetic tape 3 wound around the outer peripheral portion of the reel hub 2b does not change, the outer peripheral surface of the magnetic tape 3 shows a perfect circle.

First, when the tension applied to the leader tape 3a is 10 gf, as shown in FIG. 6, a portion having a variation of 150 μm or more occurs. When the tension applied to the leader tape 3a is 40 gf, the maximum variation is reduced to about 75 μm as shown in FIG.

When the tension applied to the leader tape 3a is 60 gf, the maximum fluctuation amount is reduced to about 60 μm as shown in FIG. 8, but the other variation is smaller than when the tension is 40 gf. The fluctuation amount of the location increases.

Further, according to this tape attaching method, the magnetic tape 3 having the leader tape 3a is wound on the reel hub 2b of the winding-side tape reel 1b by a plurality of turns, for example, about 10 to 14 turns. In the state,
It is left at a predetermined room temperature for about 10 days.

By the way, although the tape cartridge depends on the setting of the recording / reproducing apparatus to be loaded, the leader tape 3
A position of, for example, 60 cm to 70 cm from the start end of the magnetic tape 3 provided continuously to a is a logical write start position (hereinafter, LBOT: Logical Beginning Of) at which use as an information signal recording / reproducing area is started. Tape).

For this reason, the magnetic tape 3 having the leader tape 3a wound around the reel hub 2b of the take-up side tape reel 1b takes 10 to 1 windings with respect to the reel hub 2b.
By being wound about four turns, the reel hub 2 b
Then, the magnetic tape 3 is wound up to a position near the LBOT.

That is, as shown in FIG. 9, the leader tape 3a attached to the take-up side tape reel 1b
The leader tape 3 which is pressed and pressed along the outer peripheral surface of the reel hub 2b in a state where a predetermined tension is applied, and is wound by being wound up by a plurality of windings so as to be overlapped and wound.
a and the magnetic tape 3 are pressed against each other.
Deforms along the outer peripheral surface of b.

Therefore, the leader tape 3a deformed along the outer peripheral surface of the reel hub 2b of the take-up side tape reel 1b.
9 and 10 show the results of measuring the fluctuation amount of the outer peripheral surface of the leader tape 3a using a roundness tester.
This will be described with reference to FIG.

The solid line indicates the outer peripheral surface of the magnetic tape 3 wound around the outer periphery of the reel hub 2b, and the vertical and horizontal axes indicate the amount of fluctuation of the outer peripheral surface of the magnetic tape 3. . Therefore, when the outer peripheral surface of the magnetic tape 3 wound around the outer peripheral portion of the reel hub 2b does not change, the outer peripheral surface of the magnetic tape 3 shows a perfect circle. 9 and 10, points A, B, C, D, and E are sequentially attached to the leader tape 3a attached to the reel hub 2b in a counterclockwise direction.

As shown in FIGS. 9 and 10, in the leader tape 3a, compared with the state shown in FIG.
It has been reduced to 5 μm or less, and the bulging shape due to the voids generated at two places 10 and 11 at the boundary between the reel hub 2b and the clamp member 4b has been removed.

That is, as shown in FIG. 9, the leader tape 3a is deformed so as to abut substantially along the outer peripheral surface of the reel hub 2b. Therefore, according to the winding-side tape reel 1b, the roundness of the outer peripheral surface of the magnetic tape 3 is improved, and the so-called Run out is reduced.

The tape cartridge provided with the take-up tape reel 1b is left for a predetermined time while the magnetic tape 3 is wound on the take-up tape reel 1b, for example, during assembly or packaging. Therefore, according to this tape attaching method, it is possible to easily deform the magnetic tape 3 along the outer peripheral surface of the reel hub 2b without using various jigs or the like and performing complicated work.

The method of measuring Run out, which is the fluctuation amount of the winding diameter of the magnetic tape 3 described above, is as shown in FIG.
The measurement is performed using the unout measurement jig 20. This Ru
The nout measuring jig 20 measures the variation of the magnetic tape 3 wound on the reel hub 2b of the winding tape reel 1b, and winds the magnetic tape 3 by driving the winding tape reel 1b to rotate. The drive unit 22 includes a drive unit 22 for taking out and a tension applying unit 23 for applying a predetermined tension to the magnetic tape 3.

The measuring section 21 includes a measuring element 24 which is in contact with the magnetic tape 3 to detect the amount of fluctuation, and a contact arm provided with the measuring element 24 at its tip to make the measuring element 24 contact the magnetic tape 3. 25. This measuring unit 21
Moves the contact arm 25 to contact the measuring element 24 with the outer peripheral surface of the magnetic tape 3 wound around the reel hub 2b of the winding tape reel 1b.

The drive section 22 is a winding tape reel 1b.
And a spindle motor (not shown) for driving the turntable 26 to rotate. The drive unit 22 drives the turntable 26 to rotate in the direction of the arrow shown in FIG. 11 by a spindle motor, and winds the magnetic tape 3 on the take-up side tape reel 1b.
The take-up-side tape reel 1b is rotated in the direction of winding on the reel hub 2b.

One end of the tension applying section 23 has a magnetic tape 3
A wire 28 attached to the other end of the wire 28 via a rod 27, a weight 29 attached to the other end of the wire 28 to apply a predetermined tension to the magnetic tape 3, and a support roller 30 a for supporting an intermediate portion of the wire 28. And a supporting member 30 having the same.

One end of the wire 28 is attached to the rod 27, and the rod 27 is wound around one end of the magnetic tape 3 and joined and fixed by the cellophane tape 31 or the like. The weight 29 has a load of, for example, about 15 g. The support member 30 includes a support roller 30a that movably supports the wire 28, and the support roller 30a.
And a base 30c provided with the support arm 30b.

According to the Runout measuring method performed by using the Runout measuring jig 20 configured as described above, the tension applying section 23 applies a predetermined tension to the magnetic tape 3 by the load of the weight 29. Then, the drive unit 22 rotates the turntable 26 to wind the magnetic tape 3 around the reel hub 2b of the winding-side tape reel 1b. Then, the measuring unit 21 makes the measuring element 24 abut on the magnetic tape 3 wound on the reel hub 2b, and measures the amount of fluctuation of the magnetic tape 3 when the magnetic tape 3 is wound once on the reel hub 2b.

As described above, according to the tape mounting method of the embodiment, the reel hub 2b of the take-up tape reel 1b is wound about 10 turns including the leader tape 3a which is the start end of the magnetic tape 3. The magnetic tape 3 wound on the reel hub 2b is pressed against each other by being left standing for about 10 days in a state where the reel hub 2b is pressed. The gap generated between the tape 3a and the tape 3a is removed.

That is, according to this method of mounting the tape, the boundary 1 between the reel hub 2b and the clamp member 4b
The leader tape 3a pulled out from 0, 11 is deformed along the outer peripheral surface of the reel hub 2b, and the bulging shape generated on the outer peripheral surface of the magnetic tape 3 wound on the reel hub 2b is removed.

Therefore, according to this method of mounting the tape, the amount of change in the diameter of the magnetic tape 3 wound on the winding tape reel 1b during recording and reproduction can be reduced, so that the tape is wound around the reel hub 2b. The roundness of the outer peripheral surface of the magnetic tape 3 is improved, and the so-called Run out is reduced to about 1/5 as compared with the related art.
Of the traveling speed of the vehicle can be suppressed.

Therefore, according to this tape mounting method, the LB is attached to the reel hub 2b of the take-up side tape reel 1b.
Since the roundness of the outer peripheral surface of the magnetic tape 3 wound up to a position near the OT is improved, it is possible to record and reproduce information signals from the LBOT of the magnetic tape 3 satisfactorily.
According to this method of mounting the tape, it is possible to reduce a signal error that occurs particularly at the time of recording and reproduction in the reel drive system, and it is possible to run the magnetic tape 3 with extremely high precision.

[0067]

As described above, according to the method of mounting the tape according to the present invention, the tape is left for a predetermined time in a state where a predetermined tension is applied to the winding tape reel and one or more windings are wound. As a result, the air gap created between the outer peripheral surface of the reel hub and the tape is removed, and the tape pulled out from the boundary between the reel hub and the clamp member is deformed along the outer peripheral surface of the reel hub. The bulging shape generated between the surface and the surface can be removed.

Therefore, according to this method of mounting the tape, the amount of change in the diameter of the tape wound on the winding tape reel during recording and reproduction can be reduced.
The so-called run out is reduced, and fluctuations in the running speed of the tape can be suppressed.

[Brief description of the drawings]

FIG. 1 is a plan view showing a tape reel to which a tape mounting method according to an embodiment of the present invention is applied.

FIG. 2 is a plan view showing a take-up side tape reel to which the above-described tape attaching method is applied.

FIG. 3 is a plan view schematically showing the winding-side tape reel.

FIG. 4 is a plan view schematically showing the winding-side tape reel.

FIG. 5 is a view showing the tension applied to the magnetic tape and the Run of the magnetic tape wound on the winding tape reel.
FIG. 7 is a diagram illustrating a relationship with out.

FIG. 6 is a diagram illustrating a variation amount of a winding diameter of a magnetic tape wound with a tension of 10 gf applied to the winding-side tape reel.

FIG. 7 is a view for explaining a variation in a winding diameter of a magnetic tape wound by applying a tension of 40 gf to the winding-side tape reel.

FIG. 8 is a diagram for explaining a variation amount of a winding diameter of a magnetic tape wound by applying a tension of 60 gf to the winding-side tape reel.

FIG. 9 is a longitudinal sectional view showing a main part of a magnetic tape wound on the winding-side tape reel.

FIG. 10 is a diagram illustrating a variation in a winding diameter of a magnetic tape wound on the winding-side tape reel;

FIG. 11 is a schematic diagram for explaining a method of measuring Run out.

FIG. 12 is a schematic diagram for explaining a capstan driving method adopted for a tape reel.

FIG. 13 is a schematic diagram for explaining a reel drive system used for the tape reel.

FIG. 14 is a schematic diagram for explaining a magnetic tape wound on a conventional tape reel.

FIG. 15 is a longitudinal sectional view showing a main part of a magnetic tape wound on a conventional tape reel.

FIG. 16 is a diagram illustrating a variation in the diameter of a magnetic tape wound on a conventional winding-side tape reel;

FIG. 17 is a diagram illustrating a variation in the winding diameter of a magnetic tape wound on a conventional winding-side tape reel.

[Explanation of symbols]

1a Supply side tape reel, 1b Take-up side tape reel, 2a, 2b Reel hub, 3 Magnetic tape, 3a
Leader tape, 4a, 4b Clamp member

Claims (3)

[Claims] 1. A method of attaching a tape to a reel hub of a take-up tape reel having a clamp member engaged with an outer peripheral portion of a reel hub by attaching an end of the tape to the reel hub via a clamp member. A method of attaching a tape to a reel hub of a take-up side tape reel, wherein a predetermined tension is applied to the reel hub, and the reel hub is left for a predetermined time while being wound up by one or more turns. 2. The tape has a signal recording area in which an information signal is recorded, and is wound around a reel hub of a take-up tape reel up to near a recording start position where recording of the information signal in the signal recording area is started. The method of claim 1 wherein the tape is taken. 3. The tape according to claim 1, wherein the tape is wound with a tension of 45 ± 10 gf when being wound on a reel hub of a winding-side tape reel. Mounting method.