JPS5933649Y2 - printer paper feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding device for a printer, such as a paper feeding device for a printer suitable for printing a savings passbook.

Conventionally, passbook printers have a semi-cylindrical platen that faces the print head and can move up and down, and the passbook sent above the platen is pressed against a counter plate that is placed in front and behind the printing section. Printing is performed using a print head.

Since the bankbook is thus held between the counter plate and the platen, it is necessary to lower the platen when feeding the bankbook and raise the platen when printing, which has the drawback of slow printing speed.

Further, when the platen is raised to press the bankbook against the counter plate, the printed portion of the bankbook is raised by the platen, resulting in an inability to print accurately.

The present invention was devised in view of the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a paper feeding device for a printer that can improve printing speed and perform accurate printing.

The present invention will be explained below with reference to illustrated embodiments.

FIG. 1 is a plan view showing an embodiment of a paper feeding device for a printer according to the present invention, and FIG. 2 is a sectional view taken along the line 2--2 in FIG.

A platen 11 disposed opposite the print head 10 is rotatably pivoted to both side plates 12a of a swing plate 12.

In order to feed the paper A to the printing section of the platen 11, a first drive roller 13 and a second drive roller 14 are disposed so as to be in pressure contact with the upper surface of the paper A on the paper supply side. is fixed to a first drive shaft 16 which is rotatably pivoted to both side plates 12a of the rocking plate 12 and a frame 15 disposed on the outside of the both side plates 12a, and the second drive roller 1
4 is fixed to a second drive shaft 17 rotatably pivotally mounted on both side plates 12a of the swing plate 12.

Here, the second drive roller 14 is disposed in a non-contact position with the platen 11.

Since the swing plate 12 is pivotally supported by the first drive shaft 16 in this manner, it can rotate around the first drive shaft 16.

A pulley 18 is fixed to the first drive shaft 16, and a pulley 20 is fixed to the output shaft of the motor 19.
A belt 21 is stretched between the two.

In addition, the first and second drive shafts 16 and 17 are equipped with Boo IJ 22.
, 23 are respectively fixed, and these boos IJ 22, 2
A belt 24 is stretched across the belt 3.

Therefore, the rotational force of the motor 19 is transmitted to the first
It is transmitted to the drive shaft 16 to rotate the first drive roller 13, and further transmitted to the second drive shaft 17 via the belt 24 to rotate the second drive roller 14.

Friction rollers 30 .corresponding to the first and second drive rollers 13 , 14 are arranged to press the bottom surface of the paper A and press the paper A against the first and second drive rollers 13 , 14 .
31 are arranged.

The friction rollers 30 and 31 are rotatably pivoted to levers 33 and 34, respectively, which are rotatably supported by fixed shafts 32 fixed to both side plates 12a of the swing plate 12.
The levers 33 and 34 are biased by springs 35 so as to press against the second drive rollers 13 and 14.

Further, above the paper A discharge side, a free roller 37 is rotatably supported by a free roller shaft 36 fixed to the frame 15 in proximity to the print head 10.

Here, the free roller 37 is arranged in a non-contact position with the platen 11.

Then, the paper A is transferred to the free roller 37 as shown in FIG.
A lever 39 is rotatably supported on a shaft 38 fixed to the frame 15 in order to press the lever 39 and release it from the free roller 37 as shown in FIG. A roller 40 is rotatably pivoted so as to come into contact with the bottom plate 12b of the lever 39, and the other end of the lever 39 can be moved up and down by a magnet 41.

Next, the operation of this device having such a configuration will be explained.

Normally, the platen 11 is in a lowered state as shown in FIG.
, 14 and friction rollers 30 and 31, and position paper A above the platen 11.

Next, when the switch is turned on, the magnet 41 is activated and the lever 40 is rotated clockwise, and the swing plate 12 is moved to the first drive shaft 1.
6 and raises the platen 11 to the state shown in FIG.

As a result, the discharge side of the paper A is pressed against the free roller 37, and the printed portion of the paper A is brought into close contact with the platen 11.

In this state, the print head 10 operates and prints on the print portion of the paper A.

Each time one line of printing is completed, the motor 19 rotates, and this rotation is transmitted to the first drive shaft 16 via the belt 21 and further transmitted to the second drive shaft 17 via the belt 24.

This causes the first and second drive rollers 13 and 14 to rotate,
Paper A is conveyed while being held between first and second drive rollers 13 and 14 and friction rollers 30 and 31.

When feeding the paper A in this manner, the paper A is brought into close contact with the platen 11, that is, the drive rollers 13, 14 and the friction roller 30 are moved without moving the platen 11 up or down.
Since the paper is fed by the paper feeding means comprised of 31, the printing speed can be improved.

Furthermore, the printed portion of the paper A is located between the free roller 37 and the drive roller 14, and the free roller 37 and the drive roller 14 press the paper A against the platen 11, eliminating the possibility of the printed portion of the paper lifting up. This allows for accurate printing.

In the above embodiment, the platen 11 and paper feeding means 13, 14, 30, 31 are supported on the swing plate 12,
Although both are configured to be swingable, the paper feeding means 13, 14, 30, 31 may be supported by the frame 15, and only the platen 11 may be supported swingably by a lever or the like.

Further, although the magnet 41 is used to swing the swing plate 12, the present invention is not limited to this. For example, a cam mechanism may be used to swing the swing plate 12.

As is clear from the above description, according to the paper feeding device of the printer according to the present invention, printing speed and printing quality can be improved.

[Brief explanation of drawings]

The figures show an embodiment of the paper feeding device of the printer according to the present invention, in which Fig. 1 is a plan view, Fig. 2 is a sectional view taken along the line 2-2 in Fig. 1 showing the state of use, and Fig. 3 is the state in which paper is inserted. FIG. 2 is a sectional view similar to FIG. 10... Print head, 11... Platen, 12... Rocking plate, 13.14...
・Drive roller, 30.31...Friction roller, 37...Free roller, 39...
・Lever 40...Roller, 41...Magnet.

Claims (1)

[Scope of utility model registration request] A rotatable platen placed opposite the print head, two drive rollers that are placed in a non-contact position with the platen on the print head side on the paper supply side and are forcibly driven; Two friction rollers are arranged corresponding to the drive rollers so as to press against the print head, and a drive roller that rotatably supports the drive roller near the print head and the friction roller near the platen, and drives the drive roller that is away from the print head. It consists of a swing plate that swings around an axis, and a free roller that is rotatably provided near the print head at a position that does not contact the platen on the print head side on the paper ejection side, and the swing plate swings. A paper feed device for a printer, characterized in that the paper feed device is configured such that the paper is brought into pressure contact with the free roller when the platen is raised.