JPH0449155A - Continuous paper discharge device - Google Patents

Abstract

PURPOSE:To prevent paper from meandering by providing a control part for individually drive-controlling the first and second spring tension adjusting means in accordance with outputs of the first and second timing detecting sensors. CONSTITUTION:Outputs of feed hole sensors 8, 9 are input to a control part 10. In this control part 10, a spring driving motor 6 or 7 is driven by detecting a phase difference between the first and second feed hole sensors 8, 9. That is, a conveying condition of paper is detected by the feed hole sensors 8, 9 provided adjacent to the first and second feed rollers 21, 22. The first and second spring driving motors 6, 7 are actuated in accordance with a signal from the control part 10, and coil springs 3, 4, associated with the spring driving motors 6, 7, are extended and contracted in a direction A or B to cause right and left press contact force of the feed rollers 21, 22 to be uniformly generated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a continuous paper ejecting device, and particularly to a continuous paper ejecting device suitable for printers and the like.

[Conventional technology]

FIG. 4 shows a conventional example. The conventional example in FIG. 4 is
It includes a first feed roller 21 that functions as a drive roller for paper feeding, and a second feed roller that contacts this via the paper and functions as a driven roller.

The first and second feed rollers 21.22 are supported at both ends by brackets 23.24. Of these, the second feed roller is engaged with elongated holes 23A and 24A formed in the bracket 23.24. The elongated holes 23A and 24A are formed in the direction of the spindle of the first feed roller 21. The second feed roller 22 is mounted on the aforementioned bracket 23.24 so that both ends thereof are urged by springs 25.26 and pressed against the first feed roller.

[Problem to be solved by the invention]

However, in the above conventional example, since the paper is ejected by pressure contact between the two rollers forming the paper ejection section, the difference in contact pressure at both ends of the first and second feed rollers 21 and 22 causes the paper to be ejected. A difference in tension between the left and right sides of the paper occurs, causing the paper to meander, which is an inconvenience.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a continuous paper ejecting means that can quickly and smoothly eject continuous paper without causing meandering of the paper, thereby improving the disadvantages of the conventional example.

[Means to solve the problem]

In the present invention, first and second feed rollers having feed holes at both ends feed the printing paper to the outside, first and second brackets that rotatably support both ends of each feed roller, and First and second spring means are provided on each brat and press both ends of the second feed roller toward the first feed roller. Further, first and second timing detection sensors are provided corresponding to both ends of the printing paper to detect the timing of the running of the printing paper, and the first and second spring means are equipped with:
First and second spring force adjusting means are provided to adjust the pressing force of each spring means as necessary. Furthermore, a configuration is adopted in which a control section is provided that separately controls the drive of the first and second spring force adjusting means in accordance with the outputs of the first and second timing detection sensors. This aims to achieve the above-mentioned purpose.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Here, the same reference numerals are used for the same constituent members as in the conventional example described above.

The embodiment shown in FIGS. 1 to 3 uses first and second foot rollers 21 and 22 for feeding the printing paper 50 to the outside, which have feed roller holes 50A and 50B at both ends.
, first and second brackets 1 and 2 that rotatably support both ends of each feed roller 21 . A coil spring 3.4 is provided as first and second spring means for pressing the feed roller 21 toward the first feed roller 21.

The first feed roller 21 is driven by a drive motor (not shown)
It is designed so that it can be rotated by being energized by. Also, the second
The feed roller 22 is brought into pressure contact with the first feed roller 22 via the printing paper 50. Guide elongated holes IA and 2A are formed in the first and second brackets 1.2 at portions that support the second feed roller 22. The long guide IA, 2A connects the shaft portion of the second feed roller 22 to the first feed roller 2.
It is provided in the direction of guiding toward the first side. A coil spring 3.4 for pressing the first feed roller 22 described above toward the first feed roller 21 is provided along the guide elongated holes IA and 2A. Specifically, the coil springs 3 and 4 are semi-wound around a pulley (not shown) that is provided at both ends of the second feed roller 22 via a hair ring. Bracket 1
．． It is connected to 2.

One ends 3A and 4A of the coil springs 3 and 4 are brackets) 1
．． The movable members 6A and 7A are connected to each other so as to be pulled along the arcuate long lengths IB and 2B formed in the second part. These movable members 6A, 7A are biased by spring drive motors 6.7 as first and second spring force adjusting means.
Alternatively, they can be moved individually and slightly in the direction of B.

In addition, feed hole sensors as first and second timing detection sensors that detect the timing of the travel of the printing paper 50 correspond to both ends of the printing paper 50 described above, and equipped on the road. The first and second feed hole sensors 8.9
A control section 10 is provided which separately controls the drive of the first and second spring drive motors 6.7 according to the outputs of the spring drive motors 6.7. The other configurations are the same as the conventional example described above.

Next, the operation of the above embodiment will be explained.

First, the outputs of the feed hole sensors 8 and 9 are input to the control section 10. The control unit 10 detects the phase difference between the first and second feed hole sensors 8 and 9 and drives the spring drive motor 6 or 7. Specifically, feed hole sensors 8 and 9 provided close to the first and second feed rollers 21 and 22 detect the conveyance state of the paper. Further, the first and second spring drive motors 6.7 are controlled by the control section 10 (
(see FIG. 2), the coil springs 3 and 4, which are linked to the spring drive motor 6.7, are expanded and contracted in the six directions or B direction in FIG. Equalize the pressure contact force on the left and right sides.

FIG. 3 shows an explanatory diagram of the operation of the spring drive motor in the above embodiment. In FIG. 5A, when the conveyance state of the paper 50 is normal, the output phase difference between the feed hole sensors 8 and 9 is approximately zero. At this time, the control unit 10 maintains the operating angle of the spring drive motor 6.7 at the 0° position.

On the other hand, if the paper conveyance state is unbalanced and the tension on the left side of the paper becomes strong and the tension on the right side becomes weak, the outputs of the feed hole sensors 8 and 9 on the left and right sides of the paper will be as shown in FIG. 3(B). produces a phase difference. In this case, the control unit 10 drives the spring drive motor 6.7 with a control amount corresponding to t to expand and contract the coil springs 3 and 4 in the direction of the arrow in FIG. By changing the pressing force at both the left and right ends of the paper, the tension on the left and right sides of the paper is equalized, and the state shown in FIG. 3(B) returns to that shown in FIG. 3(A) to maintain balance.

Also, if the tension on the right side of the paper is strong and the tension on the left side of the paper is weak, the outputs of the left and right feed hole sensors 8 and 9 will be as shown in Figure 3 (C
), resulting in a positional difference of L2. At this time, the control unit 10 drives the spring drive motors 6 and 7 with a control amount corresponding to t2, as described above, to expand and contract the coil spring 34 in the direction of arrow B in FIG. As a result, the tension on the left and right sides of the paper is equalized, and from FIG. 3, the state returns to state A in FIG. 3A again to maintain balance.

FIG. 1 is a partially omitted exploded perspective view showing one embodiment of the present invention, FIG. 2 is an operational block diagram of FIG. 1, and FIG.
FIG. 4 is an exploded perspective view showing a conventional example.

1.2...Bracket, 3.4...Coil spring, 6
7... Spring drive motor as spring force adjustment means, 8.9... Feed hole sensor as first and second timing detection sensors, 50... Printing paper.

(Effects of the Invention) As described above, according to the present invention, it is possible to equalize the pressure contact force on the left and right sides of the feed roller, and this makes it possible to prevent the paper from meandering, which has conventionally occurred. It is possible to provide an unprecedented continuous paper ejecting device that can prevent the paper feed hole from collapsing or come off the sprocket, and can feed the paper smoothly and quickly.

Applicant: Nippon Electric Co., Ltd. (1 idiot) Agent: Patent attorney, Isamu Takahashi

[Brief explanation of drawings]

No. figure No. figure z No. figure Figure 114

Claims (1)

[Claims] (1) First and second feed rollers that have feed holes at both ends and feed out the printing paper to the outside, and first and second feed rollers that rotatably support both ends of each feed roller.
a bracket; and first and second spring means that are mounted on each brat and press both ends of the second feed roller toward the first feed roller, the continuous paper discharge device comprising: First and second timing detection sensors are provided corresponding to both ends of the printing paper to detect the running timing of the printing paper. First and second spring force adjustment means for adjusting the pressing force of each spring means are provided, and the first and second spring force adjustment means are adjusted according to the outputs of the first and second timing detection sensors. What is claimed is: 1. A continuous paper ejecting device characterized in that a control section is provided for separately controlling the drive of each paper.