JPS60174672A - Paper feeder - Google Patents

Abstract

PURPOSE:To permit printing on plural papers at a single printing station by a method in which two feeding claws are rotatably supported on one paper feeding lever, and by varying the supply of voltage to a solenoid, the first paper feeding is separated from the second paper feeding. CONSTITUTION:When a paper feeding lever 5 is contacted with a cam 3, a solenoid 22 is electrically energized to release the engagement of the lever 5 and a lock lever 20. When the first paper feeding claw 8 is sent by one pitch, the other end 8a of the claw is contacted with a part of the first paper feeding a ratchet 12 to stop the rotation of the ratchet 12. The overrun of the roller 13 is prevented to permit the exact feeding of papers. Voltage is supplied to the solenoid 27 at almost the same time voltage is supplied to the solenoid 22. When one-pitch sending of the second paper feeding ratchet 18 is finished, the ratchet 18 is locked by the tip 10b of the claw and the abutting point 10a to prevent the overrun of the roller 19. The exact feeding of papers can thus be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a paper feeding device for a printer, and more particularly to a paper feeding device for a printer that prints on a plurality of sheets of paper using a single printing station.

[Prior art]

In order to print receipts, journals, slips, etc., conventional printers use horizontal printers, have multiple stations, or have multiple print heads. Functional to store in limited space.

It has not been possible to fully meet user requirements regarding dimensions, weight, price, etc.

〔the purpose〕

SUMMARY OF THE INVENTION An object of the present invention is to provide a compact paper feeding device for a printer that prints on a plurality of sheets using a single printing station.

Another object of the present invention is to provide a compact printer that prints on a plurality of sheets of paper using a single printing station, and to provide an inexpensive printer that satisfies user requirements such as functionality and size.

〔Example〕

A detailed explanation will be given below using the drawings.

FIG. 1 is a side sectional view of a paper feeding device according to an embodiment of the present invention, FIG. 2 is a side view of a portion of the paper feeding device near the second paper feeding roller, and FIG.
FIG. 4 is a diagram showing the operating state. The rotation of the motor gear 1 is converted into a swinging motion of the paper feed lever 5, which is engaged by the biasing force of a cam 3 and a spring 7, which are integrally formed with the reduction gear 2. A first paper feed claw 8 is attached to a shaft 9 on the paper feed lever 5.
It is rotatably supported by and engaged with the first paper feed ratchet 12 by the biasing force of a spring 29. A first paper feed ratchet 12 and one or more first paper feed rollers 16
A first paper feed shaft 14 to which a paper feed shaft 14 is fixed is rotatably supported by two bearings 17. A first paper press roller 16 is fixed to the shaft 15 opposite to the first paper feed roller,
It is rotatably supported by two bearings 3B. The paper feed lever 5 further has a second paper feed claw 10 attached to the shaft 11.
The tip of the second paper feed pawl 10 is urged by a spring 28 in a direction away from the second paper feed ratchet. The shaft 30 fixes a second paper feed ratchet 18 and one or more second paper feed rollers 19, and is rotatably supported by two bearings 31. A second paper pressing roller 62 is rotatably supported by a shaft 45 facing the second paper feeding roller 19 . axis 4
5 is supported by a lever 63 that is rotatably supported on the shaft 34, and a spring 35 causes the second paper feed roller 19 to
The paper presser roller is urged so that it comes into contact with the paper presser roller. Further, one end of the paper feed lever 6 is rotatably supported by a shaft 21 and engaged with a lock lever 20 biased by a spring 23. Lock lever 2 is activated by energizing solenoid 22.
0 and the paper feed lever 5 are disengaged, and the paper feed lever 5 and the cam 3 are engaged. Further, by energizing the solenoid 27, the actuating plate 24 rotates clockwise about the shaft 25.
is biased counterclockwise by a spring 26.

When the motor gear is rotating in the standby state, the cam 3 and the paper feed lever 5 are intermittently in contact with each other. When the paper feed lever 5 is in contact with the cam 3, the solenoid 22
The paper feed lever 5 and the lock lever 20 are released from each other by being energized, and the engaging portion 5α of the paper feed lever 5 is locked.
20, the paper feed lever 5 rotates with the rotation of the cam 3, and the first paper feed claw 8
engages with the teeth of the first paper feed ratchet 12, rotates the first paper feed roller 13 by a predetermined pitch, and the first paper 37 is moved between the first paper feed roller 13 and the first paper presser roller. 1
6 and sent in the direction of arrow 68 (Fig. 3). At this time, the tip 8b of the first paper feed claw 8 engages with the first paper feed ratchet 12 to feed the paper, but when the paper has been fed by exactly one pitch, the other end 8a of the first paper feed claw 8 moves to the first paper feed ratchet 12. It contacts a part of the paper feed ratchet and functions to stop the rotation of the first paper feed ratchet 12. For this purpose, the first paper feed roller 1
The overrun of No. 3 is prevented and accurate paper feeding becomes possible. After the first paper feed is completed, the cam 3 continues to rotate until it reaches the state shown in FIG. At this time, since the solenoid 22 has already been energized, the lock lever 20 is rotated by the spring 23 and engaged with the paper feed lever 5, and is in a standby state. Thereafter, the first paper will not be sent unless the solenoid 22 is energized for a predetermined period of time.

Next, the case of sending the second sheet will be explained.

As in the case of the first paper feed, when the cam 3 and the paper feed lever 5 are in contact, the solenoid 22 is energized for a predetermined time, the paper feed lever 5 is disengaged from the lock lever 20, and the paper The feed lever 50 continues to be energized until the engaging portion 5α passes through the engaging portion of the lock lever 20. Further, when the solenoid 27 is energized almost at the same time as the solenoid 22 is energized, the actuating plate 24 rotates about the shaft 25 in the direction of arrow 40 and engages with the second paper feed pawl 10. 10 is rotated about the shaft 11 and engaged with the second paper feed ratchet 18. As the cam 3 rotates, the paper feed lever 5 is rotated by the spring 16, and the second paper feed claw 10 rotates the second paper feed ratchet 18 by a predetermined pitch. At this time, the second paper feed roller 19 and the second
A second paper is held between the paper pressing rollers '52 and 1
The paper is fed by a pitch (Figure 4). Further, when the second paper feed pawl 10 has finished feeding the second paper feed ratchet 18 by one pitch, the second paper feed ratchet 18 is locked by the tip 10b of the second paper feed pawl and the lightening portion 10α. death,
Since the rotation is stopped, overrun of the second paper feed roller 19 is prevented, and accurate paper feed is made possible. At this time, since no restrictions are placed on the first paper feed claw 8, it operates in the same manner as in the case of the first paper feed, and the first paper feed roller 13 rotates by one pitch. However, when printing on two types of paper using the same station, it is not common to use the two types of paper at the same time, so the first paper feed port → 13 simply spins idly, so there is no particular problem. Does not occur. After paper feeding is completed, the cam 3 continues to rotate until it reaches the state shown in FIG.

At this time, the energization of the solenoids 22 and 27 has already ended, so the lock lever 20 is rotated by the spring 23 and engaged with the paper feed lever 5, and is in a standby state. Actuation plate 24
is rotated by the spring 26 and moves away from the second paper feed claw 24 to be in a standby state.

〔effect〕

As described above, two feed pawls are rotatably supported independently on one paper feed lever, and when only one solenoid 22 is energized, the first paper feed is performed, and both solenoids 22 and 27 are energized. When energized, the second paper feed is performed. By arranging the first sheet and the second sheet in this way, it is possible to feed the first sheet and the second sheet without mutually restricting the width of each sheet. According to the invention, 0,
By using pressure-sensitive paper or the like as the second paper, it is possible to print on the first paper and leave the second paper as a journal at the same time. Furthermore, if you use a paper that is rolled up with two sheets of the first paper, it will slip.

Three types of receipt journal printing are also possible at the same time.

Moreover, by providing two feed claws on one lever, it goes without saying that it is compact and the number of parts is reduced.

[Brief explanation of the drawing]

FIG. 1 is a side view of a paper feeding device showing an embodiment of the present invention;
Figure 2 is a side view of a portion of the area near the second paper feed roller, Figure 3 is a side view of the state in which the first paper feed is completed, and Figure 4 is a side view of the second paper feed roller.
This is a side view of the state in which paper feeding is completed.

Claims (1)

[Claims] In a printer that prints on multiple sheets of paper using a single station, a continuously rotating cam, a lever with two claws rotatably supported, and the lever selectively engages the cam. a first selection mechanism that swings the lever; a first ratchet wheel that is engaged with a first pawl that is pivotally supported on the lever; and a first ratchet wheel that is coaxially fixed to the first ratchet wheel. a first paper feeding device comprising a paper feeding roller and a first paper pressing roller opposite to the base paper feeding roller; a second selection mechanism for selectively driving a second pawl pivotally supported by the lever; a second ratchet wheel that engages with the second pawl only when selected by the selection mechanism; a second paper feed roller that is coaxially mounted with the ratchet wheel; and a second paper feed roller that faces the second paper feed roller. A paper feeding device comprising a second paper pressing roller.