JPS604769Y2 - printing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a printing device equipped with a belt cover that extends over a drive pulley and an idler pulley and covers a type belt running through a printing position.

An overview of this type of printing device is shown in FIG.

In the figure, 1 is a drive pulley, 2 is an idler pulley, 3 is a type bell, 4 is a platen, and 5 is a synchronized projecting part.

The type belt 3 has a drive pulley 1 and an idler pulley 2.
The drive pulley 1 drives the drive pulley 1 to run along the platen 4.

A large number of type characters 6 are held on the type belt 3, and the synchronization detection section 5 is provided facing the type belt 3 around which the drive pulley 1 is wound.

During printing, a hammer (not shown) provided opposite to the platen 4 is operated, and the hammer presses the printing paper 30.
Printing is performed by pressing the type 6 on the type belt 3 on the platen 4 through the ribbon 31.

In a printing apparatus having such a configuration and function, ribbon debris and the like adhere to the type belt 3 during printing, so it is necessary to provide cleaning means for this purpose.

Conventionally, as this cleaning means, a ribbon waste storage section 7 is provided opposite to the type belt 3 wound around the idler pulley 2.

A brush 8 is provided within the ribbon waste storage section 7.

The tip of the brush 8 is in contact with the type belt 3, and the brush 8 automatically cleans ribbon debris and the like adhering to the type belt 3, removes it from the type belt 3, and drops it into the ribbon debris storage section 7.

However, with such a configuration, when replacing the brush or attaching/detaching the type belt, it is necessary to remove the belt cover (not shown) that covers the type belt and also to remove the ribbon waste storage section 7, which is a cumbersome task. The ribbon waste storage section 7 that accommodates ribbon waste faces the idler pulley 2, and cleaning with the brush 8 is performed after the type belt 3 passes the synchronization detection section 5 for printing verification, so the synchronization detection section 5 and the type belt 3 during printing are likely to get clogged, and the ribbon waste, etc. that passes through the core and is carried by the type belt 3 falls out on the way before reaching the ribbon waste storage section 7. There were various shortcomings.

The present invention is intended to solve the above-mentioned various drawbacks, and it is easy to replace the brushes and attach/detach the type belt.In addition, it is easy to remove ribbon debris from the synchronization detection section, and the ribbon passes through the core and is carried by the type belt. It is an object of the present invention to provide a printing device in which debris does not fall on the way.

Next, embodiments of the present invention will be described with reference to FIGS. 2 to 4.

FIG. 2 is a front view showing the main parts of the embodiment of the printing device according to the present invention, and FIG. 3 is a plan view of the same. In the figure, 11 is a belt cover, and 12 is a pair of It's a brush.

Inside the belt cover 11, there is a concave fitting part 13 for positioning the belt cover 11 with respect to the drive pulley.
A pair of brush holding parts 14 are provided for removably attaching the brush 12.

The fitting part 13 is adapted to fit into the end of the shaft 15 of the drive pulley 1 when the belt cover 11 is attached, as shown in FIG.

In FIG. 4, reference numeral 16 denotes a type belt drive motor, and the drive pulley 1 is driven by the type belt drive motor 16 via a pulley 17, a belt 18, and a pulley 19.

The brush holding portion 14 is provided with a groove 21 into which the holder portion 20 of the brush 12 is fitted.

The brush 12 can be easily attached and detached using this groove 21.

That is, by fitting the holder part 20 into the groove 21 and screwing the screw 23 inserted into the washer 22 into the screw hole provided at the end of the brush holding part 14 and tightening, the holder part 20 is pressed by the washer 22. and fixed.

When removing the brush 12, the brush 12 can be easily removed by simply removing the screw 23.

The tip of the brush 12 attached in this way is positioned accurately with respect to the drive pulley 1 by the fitting part 13 fitting into the shaft 15 of the drive pulley 1 when the belt cover is attached. ,
The surface of the type belt 3 around which the drive pulley 1 is wound is constantly contacted to clean the surface of the type belt 3.

Therefore, ribbon debris and the like can be prevented from falling from the type belt 3 between the drive pulley 1 and the idler pulley 2.

In addition, if the brush 12 is also provided in the part closer to the platen 4 from the synchronization detection section 5 as in this example, the type belt 3 can be cleaned by this brush 12 before reaching the synchronization detection section 5. It is possible to prevent ribbon debris and the like from clogging the synchronization detection section 5.

As described above, according to the present invention, various excellent effects can be achieved as described below.

(1) When the belt cover is removed, the brush is also removed, so replacing the type belt is easy. (2) The belt cover is accurately positioned relative to the drive pulley during installation, so it can be attached to the belt cover. It is possible to correctly align the brush with the type belt,
Moreover, the brush can be easily attached to and detached from the belt cover.

(3) Ribbon debris, etc. can be prevented from falling from the type belt between the drive pulley and the idler pulley.

(4) If the brush is provided in a portion closer to the platen side than the synchronization detection section, it is possible to prevent ribbon debris and the like from clogging between the synchronization detection section and the type belt.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of a conventional printing device, Fig. 2 is a front view showing main parts of an embodiment of the printing device according to the present invention, Fig. 3 is a plan view of the same, and Fig. 4 is a belt for a drive pulley. This is a cover positioning procedure diagram. In the figure, 1 is a drive pulley, 2 is an idler pulley, 3 is a type belt, 4 is a platen, 5 is a synchronization detector, 6 is a type, 11 is a belt cover, 12 is a brush, and 13 is a fitting. 14 is a brush holding part, 15 is a shaft, 20 is a holder part, 21 is a groove, 22 is a washer, 23 is a screw, 30 is a printing paper, and 31 is a ribbon.

Claims (1)

[Claims for Utility Model Registration] In a printing device, a drive pulley is disposed in the running direction of a type belt passing through a platen position, and a belt cover is provided to cover the type belt passed between the drive pulley and an idler pulley, The belt cover is provided with a fitting part for positioning that fits into the shirt end of the drive pulley, and inside the belt cover there is a type whose tip is in contact with the type belt that is wound around the drive pulley. A printing device characterized in that a belt cleaning brush is removably attached. □