JPS58181669A - Paper feeder for printer - Google Patents

Abstract

PURPOSE:To prevent the hitching of paper and stain on the printed surface by arranging a mobile paper feed pinch roller below a paper feed drive roller, a paper delivery pinch roller on a paper guide on a mobile paper delivery drive roller below the roller. CONSTITUTION:When the attraction force of a permanent magnet at a paper feed driving section 9 is cancelled, a platen 3 and a paper feed pinch roller 7 is lifted to grasp a paper between rollers 6 and 7, causng a pad section 29a of a paper stopper 29 to sink below paper passage. Thereafter, a print head 4 is operated to print. After the printing and feeding operation are repeated required times, the paper A is returned to the inlet/outlet. This return operation is done as soon as the paper A is grasped between rollers 14 and 16 with the lifting of the paper delivery drive roller 16 mounted to a supporting body 15 following the excitation of a paper delivery drive section 18.

Description

DETAILED DESCRIPTION OF THE INVENTION A paper feeding device for a glitter machine is provided with a return mechanism, and each rake of each of these mechanisms is arranged in front of a printing section.

The conventional paper feeding device W has a paper feeding Pll. The driving rollers of the mechanism and the paper return feeding mechanism are immovable, and the pinch rollers are brought into contact with and separated from them as appropriate. In addition, the drive roller of the paper return feed mechanism is located below the pinch roller to prevent the printed surface from being rubbed when the paper is ejected, so the mechanism that moves the pinch roller up and down is , on the front side of the printing unit and above the front paper guide that guides the paper. According to such a conventional structure, a cover (- Coupled with the longer llq + If the leading edge of the paper is bent or curled, it can easily get caught in the initial position.Furthermore, in conventional paper feed Mliil2, there is no power from the drive system to the paper return feed mechanism. Power is transmitted via a clutch.As such, the clutch requires a solenoid to operate the clutch, and a circuit that controls the timing of the solenoid's operation. There is also the problem of complicating assembly.(2) Since the solenoid is a relatively large component, there is a high possibility that it will be difficult to locate it when trying to downsize the entire printer (2).

The present invention was developed under the above circumstances (2), and its purpose is to feed the paper regardless of the length or shortness of the paper (2), and at the time of paper ejection, the printing surface of the paper is driven by the paper ejection drive. It is a printer that not only does not get scratched by the gutter, but also prevents paper from getting caught in a smooth and reliable manner. The purpose of the present invention is to provide a paper feeding device.

That is, the present invention (second paper feeding device for a printer according to the present invention)
A paper feed drive roller (2) of the paper feeding mechanism is disposed immovably on the paper guide, and below this roller is a movable paper feed pinch roller (42), and this pinch roller is connected to the paper feed drive roller (2). A structure for bringing the sheet into contact with and separating it from the sheet is provided, and the paper ejection pinch roller of the paper return feed mechanism is immovable in the paper guide F (2). and disposing a structure that brings the drive roller into contact with and separates from the immovable paper ejection pinch roller (secondly, it is possible to prevent the paper from getting caught and to prevent the already printed surface from being smeared, and The paper ejection drive opening is placed below the grating (: a spindle for supporting the gears of the drive system (2) accommodated in a movable support that is pivoted (1) and (2) interlocked with the above gears (2). It is characterized by being configured such that it can be rotated constantly (and, secondly, it can eliminate the need for a clutch, etc.).

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a horizontal plate-shaped front paper guide, and 2 is a pair of horizontal plate-shaped rear paper guides C arranged at the rear of the front paper guide 1 and spaced apart from each other. , 2 (a paper path is formed across the two, and the front end of this path, that is, the front end of the guide 1 mentioned above, is connected to the two paper entrances and exits C on the front surface of the cover (not shown). Ha!Latin J is installed.
A print head 4 of, for example, a dot printing method is disposed above the grating 3 (2).

This head 4 performs a printing operation by reciprocating along the longitudinal opening of the platen 3.

Further, 5 in the figure is a paper feed mechanism that feeds the paper A between the grating 3 and the print head 4, and includes a paper feed drive roller 6, a paper feed pinch roller 7, an OJ roller 1, and a paper feed drive unit 9. It is formed with

In other words, the paper feed drive roller σ is disposed about 1" side of the print head 4 and is immovable on the front paper guide 1. To be more specific, the paper feed drive roller 6 is located on the front paper guide 1.

Left and right frames (not shown) of the electronic cash register (
It is integrated with this shaft 6M on a rotating shaft 6m that is horizontally suspended across two parts (
Two rotation shafts 61 are used because they are fixed and rotate twice.This rotating shaft 61 is connected to the driving system via a clutch (not shown), and is rotated only when paper is fed. Two paper feed pinch rollers 7 are disposed facing each other below the paper feed drive roller 6, and each of these is supported by a movable body 8. Further, the movable body 8 has one end (having a pinch roller support part 8a) and the other end is rotatably supported on a shaft 10. Paper feed drive roller 6 (contacts and separates twice).

This movable body 8 has a biasing body 11 (secondary tension) such as a torsion spring.
(Counterclockwise direction of the hour hand in Figures 1 to 3)
Two biased. Moreover, in this embodiment, “J 1il
The J body 8 supports the grating 3.

This is a measure to make paper feeding easier by increasing the distance between the nib tray ten 3 and the print head 4 when inserting the paper and feeding the paper back, and it may be omitted. In this embodiment, the stone/mother interlocking section 12 is bifurcated into two movable bodies J! in order to provide the paper stock/amount described above.

In addition, a solenoid is used for the paper feed drive unit 9 (2), and the movable body 8 is rotated when ≦2.

This solenoid (- is a so-called latching solenoid having, for example, a permanent magnet, a recovery side electromagnet, and an attraction side electromagnet).

Furthermore, numeral 13 in the figure is a paper return feeding mechanism for ejecting paper from between the grating 3 and the print head 4 toward the paper loading/unloading slot C2. This mechanism 13 includes a paper ejection pinch roller 14,
Movable support body 15, paper ejection drive roller 16, power transmission system 11
, and a paper ejection drive section 18.

That is, the paper discharge pinch roller 14 is disposed on the front paper guide 1 on the opposite side of the print head 4 and is immovable.

To be more specific, the paper ejection pinch roller 14 is connected to a fixing member such as the left and right frames (not shown) (the shaft 14 horizontally suspended across the two).
A ship can freely rotate twice (two are supported, and two are used. In this embodiment, in order to shorten the distance between the printing section and the paper inlet/outlet (two, two paper ejection pinch rollers 1
4 is located between the two paper feed driving rotors, and as shown in FIGS. The support body 15 has a substantially U-shape in plan view, and is formed by horizontally supporting the rotating shaft 19 across its both sides 15m and 15b+2.
5m, 15b The distal end side is located below the grating 3 (two support shafts 20 (two supported shafts are provided and are rotatable around the shafts 2Q).

The support shaft 20 is fixed to a fixed member (not shown), and a gear 21 of the driving system is rotatable (2) on the inside of one side 15m (2).
1 (2) is an intermediate gear 22 of the driving system. Two paper ejection drive rollers 16 are used, and a rotary shaft 1 (2) facing the paper ejection pinch roller 14 (2) is integrated with this. In addition, in the case of one embodiment, the power transmission system 11 is fixed so as to rotate at the inner side 11 of the side portion 11m.
: It is formed from a supported gear group II, 24.25 and a belt transmission part 2σ. The belt transmission section 26 is connected to the side surface of the input gear 23 of the tooth group (two connected driven gears 92
6m, drive connected to the side of the gear 2 above! -ri x g
b, and a timing pel wrapped around each goury j1a and J#bl) JIIFC. The gear groups 23, 24. The ISs are in mesh with each other, and in order to interlock the paper ejection drive roller IC (two output gears 25 are fixed to the rotating shaft 1. Therefore, during the operation of the drive system, the paper ejection drive roller 1 - is a constant time.

It is set to C2 so that it can be rotated. Furthermore, C2, paper ejection drive section 1
1 is formed from a solenoid l1m, an excitation 4 of this solenoid 18a, a bell crank 1llc that rotates twice about the axis Jlb, an engaging protrusion lad protruding from this crank 18c, and a return ring (not shown). The engaging protrusion 18d is located on the side 1 of the movable support 115.
5 a C bored engagement hole 15c (two engaged. This paper ejection drive unit 18 causes the paper ejection drive roller 16 to approach and separate from the paper ejection pinch roller J4 via the movable support 15. In the figure, 27 is a fixed stopper, 28 is a stop/mother
An extended part (not shown) of the movable body 8 (-supported shaft, 29 is a paper stock supported on the shaft 28). passing through the paper path (having an abutting part 29 that is sunk);
The other end portion (2) is formed with an engaging portion 29b that corresponds to the fixed stopper 27, and a protrusion 29c that faces the stopper interlocking portion 12.Furthermore, this paper stocker 4'29 is held by a spring SO. Always touching part 29m
is biased to protrude from the paper path (2).Also,
In the figure, numeral 31 denotes the strut horns and interlocking parts provided protrudingly from the movable support 15ζ.

Next (2. Paperman's sending work IEL) will be explained.

The stopped state of this device is shown in FIG.
Both the platen 3 and the paper feed bin roller 16 are in the lowered position C2, and the paper stopper 29 is in the lowered position C2.
The urging force of the Sugering 30 (2) makes the engaging part jjlb come into contact with the fixed stone/42"li2, and the contact part 2# my paper path (2) is positioned in a protruding state. The above state positions of S and paper feed pinch roller C are maintained by the attractive force of the permanent magnet of the paper feed drive unit 9, and the above state position ψ of the paper discharge drive loaf IC is maintained by the spring force of a return ring (not shown). In this state, paper A is inserted by the operator using the front paper guide #'l as a guide, and this paper A hits the abutting section 2 and is positioned at a predetermined position with the paper stock lever 2#. Ru.

The printing operation is carried out in a state where the recovery side electromagnet of the paper feed drive unit 9 is energized. When the recovery side electromagnet is excited, the attractive force of the permanent magnet of the paper feed drive unit 9 is canceled, so the biasing body 1
The urging force of 1 (from 2 = j) The moving body 8 is moved counterclockwise (2 times), and as shown in FIG. ≦Two clamps. At the same time (-1) because the movable body 8 pushes up the protrusion 29c via its strut horn interlocking part 12.

The paper stock lever f j 9 is rotated about the shaft 28 in the counterclockwise direction against the spring force of the Sgelling SO.

Therefore, the contact portion 19m of the paper stock/arm 2# is retracted below the paper path. After this, the print head 4 is operated to perform a printing operation.

Printing - Operation of Rad 4 fll'r11k (=Paper A is fed in the direction of the rear paper guide 2. This feeding operation is performed by using the power from the drive system through the clutch while maintaining the state during the printing operation described above. Paper feed drive roller wheel 1: This is carried out by rotating the rollers 6 and 7 by transmitting the information for a certain period of time.

After such printing operation and feeding operation are repeated the required number of times, the paper is fed back to the paper entrance (two times). At the same time, it is performed by exciting the magnet Ila of the paper ejection drive unit 18.In other words, the NJ magnet of the paper feed #movement-?!1cI9 (the force of the biasing body 11 from the second)
Since the movable body 8 is moved in the hour hand direction (in the direction of the hour hand), the platen 3 and paper feed drive roller 7 are held in the lowered position. As a result of the rotation, the movable support 1j is rotated about the support shaft 19 in the counterclockwise direction C2 (twice) through the engagement protrusion lad, and the discharge drive roller 16 attached to this support 15 is raised. The paper sheet is held between the rollers 14.II+: This state is shown in FIG. Therefore, each roller weighs 14.1g.
At the same time as the sheet grips the paper sheet, the return feed operation of the sheet is carried out. In this case, the printed surface of the sheet is rubbed by the sheet discharge drive roller 16 (2), and of course it is not soiled. By pushing up the retaining part 29b of 29, the abutting part 29 is removed from the paper path, so the paper holding part 29 will not get in the way of the paper return feeding operation (of course, this will not happen). Afterwards, the excitation of each of the drive parts 9 and 18 is released, resulting in the rest state shown in FIG. Since the belt transmission unit 26 is used for the rotation of the movable support 15 to which the paper ejection drive roller 16 is attached, there is no problem in terms of power transmission, etc. The drive roller 16 can be rotated at all times.

Although the above embodiment has the C2 configuration as described above, the present invention (in the second embodiment, the platen 3 may be fixed, and the paper stock 4 may be fixed).
29 and related parts 11, 27, ;#, 30, etc. may be omitted.

Furthermore, the belt transmission section 26 of the -1 power transmission system 17 may be implemented using a gear group ≦2. In addition, in the above embodiment, each roller 6.1 on the feeding side is arranged on the side closer to the print head 4. (2. The rollers 14 and 16 on the far side (return feed side) are arranged, but this arrangement may be reversed. In addition, the gist of the invention To the extent possible, the front drive roller, paper feed pinch roller, movable body, paper feed drive unit, and paper ejection pinch roller.

The specific structure, shape, position, etc. of the movable support, paper ejection drive roller, power transmission system, paper ejection drive unit, etc.

Of course, it can be constructed and implemented in various ways.

The present invention described above is based on the structure described in claim 2 above.

Therefore, since it is equipped with not only a paper feed mechanism but also a paper return mechanism, it is possible to use not only long paper but also short paper.
It has the effect of allowing the paper to be taken out from the printing section more easily than the paper return feed mechanism (2).

The rollers of the paper feed mechanism and the paper return mechanism are both located on the front side of the printing section (despite the two rollers installed on the front paper guide, the paper feed drive roller and ejection roller that cannot be moved) are located on the front paper guide. Only one paper pinch roller is installed, and all of the various movable structures are located at the bottom. It is possible to shorten the distance (2. on the front paper guide (2) and reduce the number of adjacent structures. Therefore, if the leading edge of the paper is folded or curled due to these factors,
The paper is in the front paper guide.

This has the effect of reducing the possibility of the paper being caught by the structure C2 on the board, and allowing smooth and reliable paper feeding operations (feeding and return feeding).

Moreover, the return operation of the paper is performed by the upward movement of the paper ejection drive roller (secondarily, the paper is pinched between this drive roller and the immovable paper ejection pinch roller), so it is difficult to print on the paper. Needless to say, the surface of the paper is not rubbed by the paper ejection driving roller, so that the paper is not soiled.

The paper ejection drive roller is constantly moved and rotated relative to the gears of the drive system located below the platen (2). Rotation around the axis (2) and paper ejection pinch roller (2) because the paper is brought into contact and separated, the clutch of the paper return feed mechanism and its related equipment, which were required in the past, can be omitted. Therefore, the structure and assembly can be simplified. It is simple and inexpensive (2).

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIGS. 1 to 3 are schematic side views of different rod configurations, FIG. 4 is an enlarged side view of the paper return feed mechanism, and FIG. 5 is the same return feed mechanism. FIG. 2 is a partially exploded perspective view. 1... Front paper guide, 3... Graten, 4...
Print head, 5... Paper feed mechanism, 6... Paper feed drive roller, r... Paper feed pinch roller, 8... Movable body, 9... Paper feed drive unit, IJ... Paper Return feed mechanism, ... paper discharge drive section, 19 ... support shaft, 21 ... gear, 2B, 14.15 ... gear % 26 ... belt transmission section. 26a, 26b...l-ri, 26c...belt.

Claims (2)

[Claims] (1) between the grating and the print head that is moved along the longitudinal direction (2) of the grating above the platen (2) a front paper guide (2) a paper feeding mechanism that feeds the guided paper; A printer's paper feeding device (2), which is equipped with a paper return feeding mechanism (2) that ejects paper from between the grating and the print head. (2 paper feed drive lobes arranged below this drive roller (2 paper feed pinch rollers arranged opposite to each other, this pinch roller can be moved up and down) (2 supported movable body, this movable body The above-mentioned pinch roller is operated by the above-mentioned pinch roller (formed of a paper feed drive section that brings the paper into contact with and separates from it), and the above-mentioned paper return 8!1.
On the l side and above the front paper guide ≦ 2 unmovable (2 disposed paper ejection pinch rollers, and below the above grating (-) the support shaft supporting the gears of the drive system disposed (2 pivotably supported) a movable support body C, a constantly rotating paper ejection drive roller which is bifurcated from support C and connected to the gear via a power transmission system, and a paper ejection drive roller that rotates the movable support body. A paper feeding device for a printer, characterized in that it is formed from a paper ejection pinch roller (two paper ejection drive parts that touch and separate). (2) The paper feeding device for a printer according to claim 1, wherein the movable body supports the platen. 3) The power transmission system includes a gear group supported by two movable supports and interlocking the paper ejection drive lobe, a driven googly connected to the input gear of this gear group, and a gear of the drive system (
Claims (1) or (2) (C2) characterized in that it is formed of two connected drive googles and each gooley (a belt transmission section consisting of two belts wrapped around each other). g The paper feed long tooth of my own printer.