JPS62100355A - Device for feeding long-sized paper to high-speed printer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is for drawing long sheets of paper folded into bulk piles and feeding the long sheets of paper to a paper shaft of a high-speed printer, particularly a laser printer, which generates a drawing force. The apparatus comprises at least one guide roller for long paper, each of which is arranged above the pile, at the rear of the pile as viewed in the direction of withdrawal and in front of the paper shaft of the high-speed printer. , in which at least one guide roller is simultaneously used as a deflection roller for the direction of paper travel.

BACKGROUND OF THE INVENTION Large quantities of oil are used in large computer printers based on operating speeds, in which case a long sheet of paper folded into a pile can have up to too many leaves, resulting in a large number of sheets for oil replacement. The distance between them is correspondingly large.

Based on predetermined room conditions, a large quantity of paper, often arranged on a pallet with several possibly different paper sizes, is brought directly into the introduction shaft of a high-speed printer, i.e. long paper k/ It is often impossible to pull the paper directly from the sheet and feed it to the inlet shaft.Furthermore, it is often impossible to pull the paper directly from the sheet and feed it to the inlet shaft. It is often unavoidable to install the pile in such a way that it has to be fed at right angles.In the known devices, the pull-out force is generated exclusively by the high-speed printer itself.This pull-out force is therefore often It is necessary to generate friction loss over the entire length of paper travel, including at least the friction loss at the point of change of direction, and in other words, the printer itself has a corresponding size. In this section, there is a risk of tearing, especially in the case of papers with low tensile strength, such as recycled paper, for example.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to reduce the tensile forces acting on a length of paper using mechanical means and to prevent the undesired tearing of the length of paper.

Means for overcoming the interlayer problem The means of the invention which solves this problem consists in the fact that in a device of the type mentioned at the outset, at least one of the deflection rollers is driven.

Effects of the Invention According to the configuration of the present invention, the drawer drive device arranged in a high-speed printer has a drive device that assists in the range of the running path of the long paper, so that when the drive device is suitably tuned, the drawer force can be reduced. need only be produced over a relatively short section, so that the entire length of paper is only slightly loaded. A separate drive motor can advantageously be provided for the driven deflection roller. Advantageously, the driven deflection roller rotates continuously, so that even when the printer is stopped, i.e. when the pull-out force is no longer acting, said deflection roller continues to rotate the entire length of paper. is also sent for a short time.

However, since the long paper is accumulated immediately behind the driven deflection roller, it is very quickly lifted off the stationary deflection roller, so that the long paper and the deflection roller are separated. The sticking between them disappears and the deflection roller rotates freely. The continuous drive of the deflection rollers has the further advantage that, upon start-up of the printer, the deflection rollers again assume a supporting drive action at the moment when the web is retensioned. This ensures that the pulling forces, which occur impulsively, especially during start-up, are transmitted only to the section of paper between the printer and the driven deflection rollers, while the final transmission friction Since the strip of paper is gradually brought into contact with the deflection roller until a force is generated, the pull-out force is damped and is not transmitted to other strips of paper. The choice of a deflection roller with a drive is made taking into account expediency; in any case, the driven deflection roller is advantageously arranged close to the paper shaft of the high-speed printer.

Implementation In many application series, the direction of withdrawal of the long paper from the bulk pile is different from the direction of entry into the high speed printer;
As a result of this it is necessary to provide a reversal intersection, which for example comprises an entry roller arranged at right angles to the withdrawal direction and immediately behind the entry roller 90' to the drawing direction.
It consists of a reversing roller, which is arranged at a smaller angle than It can be deflected, for example, by 90 DEG perpendicular to the direction of travel by means of reversing rollers, and in the direction of extension by means of run-off rollers. According to an embodiment of the invention when using such reversing intersections, the reversing rollers, but preferably the run-off rollers of the reversing intersections, are driven.

A reversal intersection is usually located immediately in front of a high-speed printer when large piles, such as those stacked in rows or alets, need to be placed next to the high-speed printer. Due to the change in direction, particularly high frictional forces act on the paper strip in the area of the reversal intersection, so that the risk of tearing the paper strip at this location is correspondingly greater. It is therefore particularly advantageous at this point to arrange at least one driven roller, preferably a run-off roller, in the area of the reversal intersection.

In order to transmit the driving force of the driven rollers particularly effectively to the web, in accordance with an advantageous embodiment of the invention, a guide roller is assigned to the driven rollers at a slight parallel spacing. , the long sheet of paper is guided first of all via a driven roller and then via a guide roller, changing the running direction between the two rollers.

In other words, the long sheet of paper is guided in a loop between the driven roller and the guide roller, and as a result, the winding required to transmit the driving force from the driven roller to the long sheet of paper is at an angle. is guaranteed.

For this purpose, the driven rollers and the guide rollers are configured to be offset from each other in the running direction of the long paper and at right angles thereto.

implementation row Next, the present invention will be explained in full detail with respect to the illustrated real # column.

In FIG. 1, a high-speed printer 1 is shown with a paper shaft 2 into which a long sheet of paper 3 to be printed is fed from one side and through which it is printed by the high-speed printer. The long paper 4 thus obtained is extracted. The printed long paper 4 travels through a plurality of direction changing rollers 5, and depending on the folding method of the long paper, /! ? The sheets are continuously discharged onto the file 6.

The paper is fed from the large quantity paper 7 or 8, and the large quantity paper 2 paper is fed from the side of the printer. It is placed on the let 9. In order to extract the paper strips 3 from the dog i-piles 7 or 8, a specific extraction device is used, which consists first of all of a frame 10.
The frame has a guide roller 1 arranged above the pile.
1, a detection device 12, and another one located behind the +oil, seen in the direction of withdrawal, has an idler roller 13. The guide roller 13 deflects the long paper downward by 90 degrees. The long sheet of paper travels behind the milling mill close to the floor, where it is again deflected horizontally by 90° by the guide roller 14, and from there it finally passes through the reversing intersection 15 and enters the paper shaft 2 of the high-speed printer 1. Supplied. The reversal intersection 15 changes the direction of the entire long paper by 90° with respect to the previously given running direction.

At the reversal intersection, which is shown in detail in FIG. This prevents it from becoming biased. Immediately behind the guide roller 17 and at approximately the same height is another guide roller 18.
is mounted at an angle to the direction of travel.

This guide roller 18 is turned by 90 degrees with respect to the entire running direction of one long sheet so as to be parallel to the arrow indicating the running direction.

In addition, the reversing cross section 15 has a guide roller 20 in the area of the paper sheet outlet 19, which is designed as a run-off roller and is driven by a motor, designated by the reference numeral 21 in FIG. have money. The driven idle roller 20 has a shim or plastic lining to better transmit the driving force. Offset from the driven guide roller 20, another non-driven idle roller 22 is arranged, so that the long paper 3 is deflected several times and a correspondingly large winding touches the driven guide roller 20 at an angle. It looks like this.

Behind the guide roller, the paper strip 3 is further guided vertically upwards and then, if necessary, via another guide roller, into the paper shaft 2 of the high-speed printer.

In addition to the guide roller 20, a row guide roller 14 is provided.
may have its own drive, and one or more rollers may be driven within the reversing intersection 15.

[Brief explanation of drawings]

Figure 1 is a perspective view of a high-speed printer equipped with a paper feeder;
3 is a detailed perspective view of the reversing intersection, and FIG. 3 is a partial side view showing the arrangement of the reversing intersection in the region of the run-off rollers. 1...High-speed printer, 2...Paper shaft, 3, 4...
...Long paper, 5...Direction changing roller, 6...Pile, 7
゜8...Large pile, 9...Nomilet, 10...
-Frame, 11...Guide roller, 12...Detection device, 13.14...Guide roller, 15...Reversal intersection, 1, 7, 18...Guide roller 19...
- Exit, 20... Guide roller, 21... Unique drive device, 22... Guide roller

Claims (1)

[Claims] 1. A device for pulling out a long sheet of paper folded into a large pile and supplying the long sheet of paper to a paper shaft of a high-speed printer that generates a pulling force, which At least one long paper guide roller (11, 13, 14, 17, 18, 20, 2
2), in which at least one guide roller is simultaneously used as a deflection roller, and at least one of said deflection rollers is driven. A device that supplies long paper to 2. The direction in which the long paper is drawn out from the large pile is different from the direction in which it enters the high-speed printer, and there is a feeding roller disposed perpendicular to the drawing direction, and a roller immediately behind the feeding roller. On the other hand, there is provided a reversing intersection consisting of a reversing roller installed at an angle of less than 90° and another running roller arranged at right angles to the entry direction, the reversing intersection 2. A device according to claim 1, wherein the reversing roller or the run-off roller is driven. 3. A guide roller (22) is attached to the driven roller (20) at a slight parallel interval, and the long paper (
3) first of all via a driven roller (20);
3. The device as claimed in claim 1, wherein the device is then guided via guide rollers (22), changing the running direction between these rollers. 4. Driven roller (20) and guide roller (2
4. The device according to claim 3, wherein the sheets 2) are offset from each other in the running direction of the paper strip (3) and at right angles to the running direction.