JPH0642863Y2 - Ink ribbon winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an ink ribbon winding device that transmits friction to wind a predetermined amount of ink ribbon in a thermal transfer printer or the like.

[Prior Art] In a thermal transfer printer, an ink ribbon is wound and printed. However, when the ink ribbon is wound on a take-up reel, the winding radius changes as the ink ribbon is wound. When the take-up reel is rotated at a constant speed, the tape take-up amount changes. Therefore, generally, an ink ribbon winding device provided with a friction transmission mechanism as shown in FIG. 2 is known. This ink ribbon take-up device has a disc-shaped member 2 provided on the outer periphery with a gear 1 that meshes with a driving member such as a motor. The disk-shaped member 2 is provided on a winding shaft 4 integrally provided with a winding bobbin 3 at the tip thereof so as to be slidable in the axial direction and rotatable in the circumferential direction. A support plate 5 is fixed to the other end of the winding shaft 4, and a friction member 6 such as felt is arranged on the opposing surface of the support plate 5 and the disk-shaped member 2. The friction member 6 penetrates the winding shaft 4 and is fixed to the support plate 5.

On the other hand, concentric circular grooves 7, 7 are formed on the contact surface of the friction member 6 of the disk-shaped member 2, and when foreign matter such as abrasion powder is present on the sliding surface, the foreign matter is removed from the groove 7. It was housed in and kept from affecting the coefficient of friction. Reference numeral 8 is a spring for urging the disk-shaped member 2 toward the support plate 5.

In the conventional ink ribbon winding device as described above, the driving force of the driving member is transmitted to the gear 1 to rotate the disc-shaped member 2. Then, the disc-shaped member 2 rotates the support plate 5 by the frictional force with the friction member 6. As a result, the take-up reel (not shown) loaded in the take-up bobbin 3 is rotated to wind up the ink ribbon. At this time, if there is some load on the ink ribbon and there is resistance to winding the ink ribbon,
Slip occurs at the sliding contact surface between the disk-shaped member 2 and the friction member 6, and the winding amount is adjusted.

[Problems to be solved by the invention]

However, in the above-described conventional ink ribbon winding device, although a certain amount of foreign matter such as abrasion powder is stored in the groove, the foreign matter gradually accumulates because the groove is formed in a concentric circle shape. However, there is a problem that the tape cannot be housed in the groove and the friction coefficient is affected, so that the tape winding operation is not normally performed.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to prevent foreign matters such as abrasion powder from accumulating in the groove, thereby stabilizing the friction coefficient of the friction surface and performing proper winding. It is an object of the present invention to provide an ink ribbon take-up device.

[Means for solving problems]

To achieve this object, the present invention comprises a disk-shaped member that is rotated by a drive member, and a support plate that is pressed against the disk-shaped member and is fixed to the tape winding shaft. An ink ribbon take-up in which a friction member is fixed to one of the facing surfaces of the support plate and the disk-shaped member, a groove is formed in the other surface, and the driving force of the drive member is frictionally transmitted to the take-up shaft. In the device, the groove is formed in a spiral shape.

[Action]

Since the ink ribbon take-up device of the present invention is configured as described above, abrasion powder generated by friction enters the groove. Then, since the disc-shaped member is rotating, a centrifugal force is applied to the foreign matter such as abrasion powder in the groove, and the centrifugal force is applied to the disc-shaped member away from the rotation center, that is, from the center of the disc-shaped member to the outer periphery. Power will work. The groove is formed in a spiral shape, and the foreign matter in the groove near the center of rotation gradually moves along the groove to the outer periphery and is discharged to the outside of the friction surface.

Then, the friction coefficient of the friction surface is stabilized and proper winding is performed.

〔Example〕

Hereinafter, the ink ribbon winding device of the present invention will be described with reference to the drawings.

FIG. 1 is a bottom view showing an embodiment of the present invention.

FIG. 1 shows an embodiment of the present invention and shows the characteristic parts of the present invention. The other parts are the same as those in FIG. 2, and detailed description thereof will be omitted.

A disk-shaped member 2 having a gear 1 for transmitting the driving force of a driving member such as a motor provided on the outer periphery is slidable in the axial direction on a winding shaft 4 having a winding bobbin 3 at the tip thereof. , And is rotatable in the circumferential direction. In addition, the winding shaft 4
A support plate 5 is fixed to the other end of the disk, and a friction member 6 such as felt is arranged on the opposing surface of the support plate 5 and the disk-shaped member 2. The friction member 6 penetrates the winding shaft 4 and is fixed to the support plate 5.

A groove 9 is formed on the other surface of the disk-shaped member 2 that is in contact with the friction member 6. In this groove 9, one concave portion extending from the central portion to the circumferential portion is formed in a spiral shape, and is disposed outside the friction member 6 in the circumferential portion.

The operation of the above-described embodiment configured as described above is as follows.

That is, a resistance is generated in the ink ribbon, and a slip occurs between the disk-shaped member 2 and the support plate 5 (friction member 6). Then, abrasion powder is generated on the sliding surface and enters the groove 9.
An outward force such as a centrifugal force generated by the rotation of the disc-shaped member 2, the friction member 6 and the like is applied to the powder that has entered. That is, a force acting from the center of the disc-shaped member 2 to the outer periphery acts on the abrasion powder, the abrasion powder passes through the groove 9 to move to the outer periphery, and is discharged to the outside of the friction surface.

In the embodiment configured as described above, the foreign matter such as abrasion powder is not accumulated in the groove 9 by the groove 9 and is discharged through the groove 9 to the outside of the friction surface. Stable and proper winding is possible.

[Effect of device]

Since the present invention is configured as described above, foreign matter is discharged by a force such as centrifugal force applied to the foreign matter in the groove, so that the foreign matter accumulates in the groove and affects the friction coefficient of the friction surface. Stable without feeding, and can perform proper winding. Moreover, maintenance work for removing foreign matter is reduced, which is economical.

[Brief description of drawings]

FIG. 1 shows an embodiment of the ink ribbon winding device of the present invention. FIG. 1 is a bottom view of a groove portion, FIG. 2 is a front view of the ink ribbon winding device, and FIG. 3 is a conventional ink ribbon winding device. It is a bottom view of a groove part. 2 ... Disc-shaped member, 4 ... Winding shaft, 5 ... Support plate, 6 ... Friction member, 8 ... Spring, 9 ... Groove

Claims (1)

[Scope of utility model registration request] 1. A disk-shaped member rotated by a drive member,
A supporting plate fixed to the tape winding shaft while the disc-shaped member is pressure-welded, and a friction member is fixed to one of the facing surfaces of the supporting plate and the disc-shaped member, and the other is fixed to the other. An ink ribbon winding device in which a groove is formed and the driving force of the driving member is frictionally transmitted to the winding shaft, wherein the groove is formed in a spiral shape.