JPH10199195A - Tape reel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent flange plates from deforming due to the winding pressure of a tape body wound onto a reel hub. SOLUTION: The tape reel is provided with a reel hub 7 having a winding part 13 wound with the magnetic tape 2 and the upper flange plate 5, lower flange plate 6 provided at both end parts of this reel hub 7. On the lower flange plate 6 whereon the reel hub 7 is integrally formed, a discontinuous nearly annular groove 16 for absorbing the deformation is arranged in the recessed state along the outer peripheral surface of the winding part 13 of the reel hub 7 for absorbing the elastic deformation developed on the winding part 13 wound with the magnetic tape 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape reel on which a tape such as a magnetic tape is wound.

[0002]

2. Description of the Related Art In general, a tape cartridge contains a pair of tape reels around which a magnetic tape as an information recording medium is wound so as to be rotatable. This tape reel will be described with reference to FIG.

As shown in FIG. 6, a tape reel 101 is provided with a pair of an upper flange plate 105 and a lower flange plate 10 provided on both sides in the width direction of a magnetic tape 102 to be wound.
6, a reel hub 107 integrally formed with the lower flange plate 105, and a magnetic tape 102 attached to the reel hub 107.
And a clamper 108 that locks both ends of the

[0004] The upper flange plate 105 includes a reel hub 107.
Hole 10 through which the clamper 108 is inserted adjacent to the
5a has been established. The lower flange plate 106 has an engaging groove 106a provided in a tape cartridge (not shown), which engages with a reel lock means for restricting the rotation of the tape reel 101, over the outer peripheral portion.

[0005] The reel hub 107 has a central portion 112 which is rotated by a reel drive shaft of a recording / reproducing apparatus (not shown).
And a winding portion 113 around which the magnetic tape 102 is wound, and a plurality of reinforcing ribs 114 connecting the central portion 112 and the winding portion 113.

[0006] A hub hole 112a is formed in the center portion 112, into which a reel drive shaft of the recording / reproducing apparatus is inserted. The winding portion 113 is provided at an outer peripheral portion of the center portion 112, and a fitting recess 113a into which the clamper 108 is fitted is provided at the outer peripheral portion. Reinforcing rib 11
4 are integrally formed radially between the central portion 112 and the winding portion 113.

The clamper 108 is fitted into a fitting recess 113 a of the winding portion 113 of the reel hub 107 and forms a part of the outer peripheral surface of the winding portion 113.

[0008]

The above-mentioned reel hub 107 of the tape reel 101 is formed thin by providing a hub hole 112a as shown in FIG. Since the magnetic tape 102 is wound along the winding portion 113 due to the elasticity of the resin material to be formed, as shown in FIG.
Is deformed in the direction of the arrow B in FIG. 8, which is the center axis direction of the reel hub 107 (hereinafter, referred to as a winding pressure).

For this reason, in the tape reel 101, when the winding portion 113 of the reel hub 107 is deformed in the direction of arrow C in FIG. 9, the lower flange plate 106 is warped in the direction of arrow D in FIG. There is a problem that undulation occurs in the circumferential direction.

Therefore, this tape reel 106
When the magnetic tape 102 rotates by running,
There has been a problem that the reel hub 107 oscillates in the axial direction. The tape reel 101 is rotated by the lower flange plate 106 with a run-out.
Since the magnetic tape 102 wound around the winding portion 113 contacts the upper and lower flange plates 105 and 106, the magnetic tape 10
There was a problem that the tape edge of No. 2 was damaged.

It is an object of the present invention to provide a tape reel which can prevent a flange plate from being deformed by a winding pressure of a tape body wound around a reel hub.

[0012]

In order to achieve the above-mentioned object, a tape reel according to the present invention comprises a reel hub having a winding portion on which a tape body is wound, and at least two reel hubs provided at both ends of the reel hub. On one side, there is provided a pair of flange plates integrally formed with a reel hub.

[0013] The flange plate integrally formed with the reel hub is provided along the outer peripheral surface of the winding portion of the reel hub,
A discontinuous substantially annular deformation absorbing groove for absorbing elastic deformation generated in the wound portion around which the tape body is wound is provided.

In the tape reel constructed as described above, when the wound portion is elastically deformed by winding the tape body, the entire deformation absorbing groove formed in the flange plate bends and expands. By this, the deformation of the wound portion due to the winding pressure of the wound tape body is absorbed. Therefore,
In this tape reel, the elastic deformation of the winding portion of the reel hub is suppressed from being transmitted to the flange plate, and the flange plate is prevented from being elastically deformed with the elastic deformation of the winding portion.

Further, since the deformation absorbing groove is formed in a discontinuous annular shape, the tape wound around the winding portion of the reel hub is prevented from dropping into the deformation absorbing groove, and the tape is formed. The state of being wound well along the outer periphery of the winding part is maintained.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings for a tape reel.
As shown in FIG. 1, the tape reel 1 has a pair of upper flange plates 5 provided on both sides of a magnetic tape 2 to be wound.
And a lower flange plate 6, a reel hub 7 integrally formed with the lower flange plate 6, and a magnetic tape 2 attached to the reel hub 7.
And a clamper 8 provided at both ends of the head for locking the leader tape 2a.

The upper flange plate 5 is made of a transparent resin material, and has a clamper hole 5a for inserting and detaching the clamper 8 at a position adjacent to the outer peripheral surface of the reel hub 7. And this upper flange plate 5
Are bonded and fixed to the upper end of the reel hub 7 by ultrasonic fusion.

The lower flange plate 6 is formed of a resin material having elasticity. As shown in FIG. An engagement groove 6a is provided in which a lock claw of a reel lock mechanism (not shown) for controlling rotation is engaged.

The reel hub 7 has a central portion 12 rotated by a reel drive shaft on the recording / reproducing apparatus side, and a magnetic tape 2.
Is wound, and a reinforcing rib 14 connecting the center portion 12 and the winding portion 13 is provided.

The center portion 12 is provided with a hub hole 12a into which the reel drive shaft of the recording / reproducing apparatus is inserted. When the tape cartridge 10 is loaded in the recording / reproducing apparatus, the tape cartridge 10 is inserted into the hub hole 12a.
The gear-shaped detent rib portion 15 into which the reel drive shaft that enters the cartridge main body 33 from the guide hole formed in the lower half 32 is integrally formed in the axial direction over the entire circumference. ing.

The winding portion 13 is formed concentrically at the outer periphery of the center portion 12. In addition, this winding part 13
Is provided with a fitting recess 13a into which the clamper 8 is fitted. The reinforcing ribs 14 are provided radially integrally between the outer peripheral portion of the center portion 12 and the inner peripheral portion of the winding portion 13.

As shown in FIGS. 2 and 3, an annular deformation absorbing groove 16 is formed in the lower flange plate 6 along the outer peripheral surface of the winding portion 13 of the reel hub 7. That is, the lower flange plate 6 has the elastic displacement portion 17 which is formed so as to have a substantially U-shaped cross section when the deformation absorbing groove 16 is recessed. The elastic displacement portion 17 is formed in, for example, an arc having a radius of about 1 to 3 mm.
It has a shearing force of about 0 GPa to several 1000 GPa.

In the deformation absorbing groove 16, a plurality of falling-off preventing ribs 18 are formed radially over the flat portion of the lower flange plate 6 and the winding portion 13 of the reel hub 7. These drop-off preventing ribs 18 prevent the magnetic tape 2 wound around the winding portion 13 of the reel hub 7 from dropping into the deformation absorbing groove 16 and entering the deformation absorbing groove 16.
The magnetic tape 2 wound around is maintained in a good wound state.

Although the above-described deformation absorbing groove 16 is formed to have an annular shape and a rib 18 for preventing falling off, the wound magnetic tape 2 may fall into the deformation absorbing groove. If it is a configuration that can be prevented, for example, a discontinuous deformation absorption groove may be formed by arranging a plurality of arc-shaped grooves in a circular shape. Also, the drop-off prevention ribs 18
May be provided in at least one position in the deformation absorbing groove 16.

With reference to FIG. 4, a description will be given of a state in which the winding portion 13 is elastically deformed when the magnetic tape 2 is wound on the tape reel 1 configured as described above.

First, as shown in FIG. 4, the tape reel 1 is wound in the direction of arrow A in FIG. 4 by the winding pressure of the magnetic tape 2 wound around the outer periphery of the winding portion 13 of the reel hub 7. The mounting part 13 is elastically deformed. This tape reel 1
Since the deformation absorbing groove 16 is recessed in the lower flange plate 6, the elastic displacement portion 17 of the deformation absorbing groove 16 is elastically deformed.

Therefore, in the tape reel 1, the elastic deformation of the winding portion 13 is absorbed by the elastic displacement portion 17 of the deformation absorbing groove 16, and the deformation of the winding portion 13 is not transmitted to the lower flange plate 6. Therefore, according to the tape reel 1, the deformation of the lower flange plate 6 due to the elastic deformation of the winding portion 13 is suppressed, and the lower flange plate 6 is deformed such as warp or undulates in the circumferential direction. Nothing.

The tape reel 1 configured as described above is housed in, for example, a tape cartridge 10 as shown in FIG. This tape cartridge 10
A supply-side tape reel 1a and a take-up side tape reel 1b that wind the magnetic tape 2 around the peripheral surface are rotatably housed inside a cartridge body 33 configured by combining the upper half 31 and the lower half 32. I have.

The reel hub 7 of the supply-side tape reel 1a and the take-up-side tape reel 1b is provided on the bottom surface of the lower half 32.
Each of the guide holes has a guide hole (not shown) facing the outside, and a lid 34 is attached to the front side surface so as to be openable and closable.

One end of the leader tape 2a provided at both ends of the magnetic tape 2 is wound around the supply-side tape reel 1a by the clampers 8 which are respectively fitted to the reel hub 7 so as to form a part of the peripheral surface. Picking side tape reel 1
b. Then, the magnetic tape 2 fed from the supply-side tape reel 1a side is a lower half 32.
The tape cartridge 10 travels along the front side surface of the tape cartridge 10 by a pair of tape guides (not shown) disposed at the front of the tape cartridge 10 and is wound on the winding tape reel 1b. The magnetic tape 2 running on the front side surface of the tape cartridge 10 is protected by the closed lid 34.

The supply-side tape reel 1a and the take-up-side tape reel 1b are rotatably housed in the cartridge body 33 while being pressed by the reel holding member 35 toward the lower half 32.

The supply-side tape reel 1a and the take-up-side tape reel 1b are moved in the respective tape feeding directions by the locking claws of a reel lock mechanism (not shown) being engaged with the engaging grooves 6a of the lower flange plate 6. In addition, the rotation in the tape winding direction is restricted.

As described above, the tape reel 1 of the embodiment has the winding portion 13 of the reel hub 7 on the lower flange plate 6.
Since the deformation absorbing groove 16 is recessed along the outer peripheral surface of the base member, the deformation generated in the winding portion 13 due to the elastic deformation of the deformation absorbing groove 16 is absorbed, so that the lower flange plate 6 is deformed. Is reliably prevented. Therefore, according to the tape reel 1, the reliability of the rotation operation is improved, and the tape edge of the wound magnetic tape 2 can be prevented from being damaged.

Further, according to the tape reel 1, since the falling-off preventing ribs 18 are formed in the deformation absorbing grooves 16, it is ensured that the wound magnetic tape 2 falls into the deformation absorbing grooves 16. Can prevent magnetic tape 2
Can be maintained in a good wound state.

The tape reel 1 according to the present embodiment
Is applied to the magnetic tape 2 as a tape body to be wound, but may be applied to other tape bodies such as a cleaning tape for cleaning a magnetic head, a tape running path, and the like.

[0036]

According to the tape reel of the present invention, the flange plate integrally formed with the reel hub is provided with the discontinuous substantially annular deformation absorbing groove along the outer peripheral surface of the winding portion of the reel hub. By this, when the winding part is elastically deformed by the winding pressure of the tape wound on the winding part, the deformation absorbing groove is elastically deformed to absorb the deformation of the winding part, so that the flange plate is deformed. Can be prevented. Therefore, according to this tape reel, the reliability of the rotation operation is improved, and damage to the tape edge or the like of the tape body can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a tape reel according to an embodiment of the present invention.

FIG. 2 is a plan view showing the tape reel.

FIG. 3 is a longitudinal sectional view showing a state where a magnetic tape is wound around the tape reel.

FIG. 4 is a longitudinal sectional view showing a state in which a reel hub of the tape reel is elastically deformed by a winding pressure of a magnetic tape.

FIG. 5 is a perspective view showing a tape cartridge to which the tape reel is applied.

FIG. 6 is a perspective view showing a conventional tape reel.

FIG. 7 is a longitudinal sectional view showing a conventional tape reel.

FIG. 8 is a schematic diagram illustrating a state in which a reel hub of a conventional tape reel is deformed by a winding pressure of a magnetic tape.

FIG. 9 is a longitudinal sectional view showing a state in which a reel hub and a lower flange plate of a conventional tape reel are deformed by a winding pressure of a magnetic tape.

[Explanation of symbols]

Reference Signs List 1 tape reel, 2 magnetic tape, 5 upper flange plate, 6 lower flange plate, 7 reel hub, 12 center part, 13 winding part, 16 deformation absorption groove

Claims (2)

[Claims] 1. A reel hub having a winding portion on which a tape body is wound, and a pair of flange plates provided on both ends of the reel hub and integrally formed with the reel hub on at least one of the reel hubs, The flange plate integrally formed with the reel hub has a discontinuous substantially annular deformation along the outer peripheral surface of the winding portion of the reel hub for absorbing elastic deformation generated in the winding portion where the tape body is wound. A tape reel characterized in that an absorption groove is formed in a recess. 2. An annular deformation absorbing groove is provided in the flange plate, and a flat portion of the flange plate and a winding portion of the reel hub are laid in the deformation absorbing groove.
2. The tape reel according to claim 1, further comprising a falling-off prevention rib for preventing the tape wound around the winding portion from falling off and entering the deformation absorbing groove.