JP3239415B2 - Roller of tape cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cartridge rotating roller used for running a magnetic tape or a belt for tape running operation in a tape cartridge.

[0002]

2. Description of the Related Art A rotary roller of a tape cartridge is rotatably mounted on a shaft (pin), and is rotated around the shaft to rotate a magnetic tape or tape operating on an outer peripheral surface side. For example, in a tape cartridge used as an external recording device of a computer, a so-called data cartridge, a tape traveling mechanism 102 for traveling a magnetic tape 101 as shown in FIG. It is used as a pair of left and right corner rollers 103 and 104. 10
Reference numerals 5 and 106 denote a drive roller and a drive belt which together with the pair of corner rollers 103 and 104 constitute the tape running mechanism 102.

The corner rollers 103 and 104 as the rotating rollers have a predetermined thickness t as shown in FIG.
Is formed in a cylindrical shape having a shaft 107 on the inner peripheral surface side.
Is inserted so as to be rotatable on the shaft 107, and the drive belt 106 is fed on the outer peripheral surface side while rotating about the shaft 107.

[0004]

The conventional corner roller (rotating roller) has the following problems.

(1) When the corner roller rotates, heat is generated by sliding friction between the corner roller and the shaft, so that so-called seizure occurs between the corner roller and the shaft.

(2) When the temperature of the corner roller rises, the heat causes the drive belt or the like to expand or deform.

According to the present invention, the above-mentioned conventional problems can be solved by sending air toward the heat-generating portion and cooling it.

[0008]

SUMMARY OF THE INVENTION The present invention has a cylindrical shape, in which a shaft is inserted into an inner peripheral surface so as to rotate about the axis and an outer peripheral surface. The inner peripheral surface of the rotating roller of the tape cartridge adapted to feed a magnetic tape, a belt, or the like to the side.
A recess is formed between the side and the outer peripheral surface side, the outer periphery in the recess
From the surface side toward the center, the inner peripheral surface side
A number of cooling fins were provided.

[0009]

When the rotating roller rotates, convection of air is generated inside and outside the concave portion by the cooling fins, and the air flow cools the heat generating portion between the rotating roller and the shaft.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a case will be described in which a rotary roller of the present invention is used as a corner roller of a data cartridge as an external recording device of a computer.

First, the outline of the structure of a tape cartridge (data cartridge) will be described.

FIG. 1 is an exploded perspective view of a tape cartridge 1. The tape cartridge 1 has a base plate 2
A case 3 attached so as to cover an upper portion of the base plate 2; and a cover 6 for opening and closing the tape exposed portions 4, 5 provided on the front side of the base plate 2 and the case 3.

On the base plate 2, a tape supply hub (reel) 12 and a tape take-up hub (reel) 13 which respectively lock one end and the other end of a magnetic tape 11 as a recording medium are rotatable. Attached to the
A tape running path is formed by a pair of tape guide pins 14 and 15 attached to both ends on the front side of the base plate 2, and the tape feeding hub 12 and the tape winding hub 13 are rotated by a tape running mechanism 16 described below. By doing so, the magnetic tape 11 runs along the tape running path while passing through the tape exposed portions 4 and 5.

The tape running mechanism 16 is provided at first and second corner rollers 21 and 22 rotatably mounted at both ends on the rear side of the base plate 2 and at the center of the base plate 2 on the front side. Drive roller 23 and the first and second corner rollers 21 and 22
And drive belt 2 suspended by drive roller 23
4 consist Prefecture, with between the said drive roller 23 of the drive belt 24 of the first corner roller 21 is pressure contact with the outer peripheral surface of the magnetic tape 11 which is attached the tape supply hub 12 wound Between the drive roller 23 and the second corner roller 22, the tape winding hub 13.
Is pressure contact with the outer peripheral surface of the magnetic tape 11 which is attached wound.

When the drive roller 23 is rotated counterclockwise in FIG. 1, the tape supply hub 12 and the tape take-up hub 13 rotate clockwise through the drive belt 24, and the tape supply hub 12 is rotated. Magnetic tape 1
When the drive roller 23 is rotated clockwise in FIG. 1, the tape supply hub 12 and the tape winding hub 13 are rotated counterclockwise through the drive belt 24. To rotate the magnetic tape 1
1 is rewound from the tape winding hub 13 to the tape supply hub 12 side.

Next, the corner rollers 21 and 22 will be described.

The corner rollers 21 and 22 are shown in FIGS.
Is formed in a cylindrical shape having a predetermined thickness t as shown in FIG. 1, and by inserting a shaft (pin) 25 on the inner peripheral surface side,
The drive belt 24 is rotated around the shaft 25, and the drive belt 24 is fed on the outer peripheral surface side.

Ring-shaped recesses 31 and 32 are formed on the upper and lower surfaces (between the inner and outer peripheral surfaces) of the corner rollers 21 and 22, and these ring-shaped recesses 31 and 32 are formed.
A large number of cooling fins 33 are formed radially toward the center of rotation on the outer surface (large-diameter surface).

The corner rollers 21 and 22 of the first embodiment have the above-described configuration.
When the rotating member 2 rotates, wind is generated by the cooling fins 33... 33 provided on the outer surfaces of the concave portions 31 and 32, and the generated wind is blown toward the inner side surfaces (small diameter surfaces) of the concave portions 31 and 32, so that the corner rollers This effectively cools the heat generating portions 21 and 22 (sliding portions with the shaft 25).

FIG. 4 shows a second embodiment. In this embodiment, the outer surfaces of the ring-shaped concave portions 31 and 32 and the cooling fins 33... 33 gradually increase in diameter toward the opening end. With such a shape, the flow of the cooling air can be improved, and the cooling effect can be improved.

FIG. 5 shows a third embodiment. In this embodiment, tapered cooling fins 33... 33 are formed only in the recess 31 on the upper surface side, and the cooling fins 33. The corner rollers 21 and 2 are formed by the reaction force when the wind is generated.
2 against the base plate 2 side,
1, 22 are prevented from moving up and down.

In the embodiment shown in the drawings, the case where the rotary roller of the present invention is used for a corner roller is shown, but it is needless to say that the rotary roller may be used for a drive roller. The term "rotary roller" as used herein refers to a member that feeds a tape or the like while rotating widely, and includes a tape supply hub and the like.

[0023]

According to the rotary roller of the present invention, the following effects can be obtained.

(1) Utilizing the rotation (rotation) of the rotating roller, the cooling fin effectively cools the sliding contact portion (heat generating portion) between the rotating roller and the shaft, and seizure of the sliding contact portion, Elongation and deformation of the belt or tape due to the temperature rise of the rotating roller can be prevented.

(2) Since the cooling fins are provided in the recesses,
Without the cooling fins being exposed on the outer surface of the rotating roller,
No installation space is required, and the cooling fins do not impair the appearance of the rotating roller.

[Brief description of the drawings]

FIG. 1 is a perspective view of a data cartridge using a rotating roller of the present invention.

FIG. 2 is a plan view of the first embodiment.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view of a second embodiment.

FIG. 5 is a sectional view of a third embodiment.

FIG. 6 is a perspective view of a conventional example.

FIG. 7 is a sectional view of a conventional example.

[Explanation of symbols]

21, 22 ... corner roller, 31, 32 ... recess, 33 ...
Cooling fins.

Claims (1)

(57) [Claims] 1. A cylindrical shape, wherein a shaft is inserted into an inner peripheral surface side so as to rotate around the shaft, and a magnetic tape, a belt or the like is formed on an outer peripheral surface side. the rotary roller of the tape cartridge which is adapted to perform a feed, a recess is formed between the inner peripheral surface side and the outer peripheral surface side, toward the center from the outer peripheral surface in the recess, and the inner peripheral surface side Is a gap
A rotating roller for a tape cartridge, wherein a plurality of cooling fins are provided.