JPH0344766Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a paper discharge device for a copying machine in which original paper or photosensitive paper is sent to a paper holder by a feeding roller.

(Prior Art) In conventional copying machines, it is common to send copy paper to a paper discharge section by providing a pair of upper and lower feeding rollers and passing the copy paper between them.

In the conventional devices disclosed in Japanese Patent Application Laid-open No. 48-77836 and Japanese Utility Model Publication No. 43-23421, etc., as shown in FIG. Therefore, if the copy paper has a large sliding resistance on the paper tray side, it will not fall from point A and will remain on the outer periphery of the lower feed roller.
Alternatively, there is a problem that the paper curls upward at the rear end and gets caught on the upper feed roller, causing a paper jam.

Therefore, in order to increase the frictional resistance against the copy paper and ensure feeding, it has been proposed that a pair of rollers be arranged in a staggered manner, slightly biting into each other. Even if it is slightly extended, it does not reach point B, and the lower feed roller
Furthermore, since there is a paper tray underneath, the head C becomes large, and as a result, the copy paper curls in a concave shape, and the trailing edge is not caught by the lower feed roller, which often causes the copy paper to not be ejected. It was happening.

(Problem to be solved by the invention) The present invention has been made in view of the above problems of the conventional technology, and its purpose is to avoid pushing out the trailing edge of the ejected paper. In addition to allowing the sheets to fall naturally the moment they pass through the paper ejection outlet and be stacked one after another on the paper holder, the height difference between the paper ejection outlet and the paper holder is reduced to prevent concave curls in the ejected paper. It is an object of the present invention to provide a paper ejecting device for a copying machine that has a simple structure and is excellent in practical use, by preventing damage and staining of the trailing edge caused by forcibly pushing out the trailing edge of the paper. .

(Means for Solving the Problems) In order to achieve the above object, the paper discharging device of a copying machine according to the present invention has a feed roller 10 provided on a paper holder of a paper discharging section for original paper, photosensitive paper, etc. In an apparatus in which a paper discharge guide plate 11 is provided on the lower side, the paper discharge guide plate 11 is formed by comb-like protruding ridges 11a extending upward in parallel.
Each roller 10b of the rollers 10
In between, the upper end edge 11c is formed to a height H so that the biting position is inside the lower part of the roller 10b, and the front edge upper end corner 13 of the protruding ridge 11a is at least on the outer periphery of the roller 10b. or is present by biting into the inside thereof, and this front edge upper end corner 13
This serves as a paper ejection outlet.

(Function) When the original paper 5 and the photosensitive paper 4 come out of the separating section 2, they are separated into left and right parts, and the photosensitive paper 4 is separated by guide rolls 14, 15, 1.
6 and guide plate 17, etc., and is supplied between the feed roller 10 and the paper discharge guide plate 11. Feed roller 1
0 and the paper discharge guide plate 11, the rear end of the photosensitive paper 4 is bitten because the rollers 10b and the comb-like protrusions 11a feed the photosensitive paper 4 while giving it a waveform in the width direction. In the stacking position, the paper is forcefully fed until it exits the paper ejection outlet formed at the upper corner of the front edge of the protruding strip 11a, and when the trailing edge of the paper exits the exit, it is automatically fed as there is no supporting part below. Paper holder 8 in a fallen state
Since the photosensitive paper falls upward and is supported directly on the paper holder, the photosensitive paper that is sent out one after another onto the paper holder is neatly aligned and stacked.

The original paper 5 separated by the separation section 2 and directed toward the document discharge section 6 is also sent onto the paper tray 9 by the upper feeding roller 10' and the lower paper discharge guide plate 11'.

(Example) Fig. 1 shows the case where the present invention is implemented in a diazo copying machine, in which 1 is the copying machine main body;
It includes a printing section (not shown), a separating section 2, and a developing section 3 inside.

In this diazo type copying machine, photosensitive paper 4 and original paper 5 are stacked and fed to the printing section, and during the transfer, printing is performed and the paper is separated into left and right parts in separation section 2. To the outside of the machine, the photosensitive paper 4 passes through a developing section 3, undergoes a developing process, and heads toward a paper discharge section 7, where it is delivered onto respective paper trays 8 and 9.

A feeding roller 10 is provided in the paper discharge section 7 of the photosensitive paper 4,
A paper discharge guide plate 11 is provided below the feed roller 10.

As shown in Fig. 3, the feed roller 10 is made up of a single shaft 10a with a large number of rollers 10b, 10b, . Both ends are supported by the frame 12 to drive and rotate in one direction.

The paper discharge guide plate 11 has a large number of comb-like protrusions 11a.
are arranged in parallel at predetermined intervals, and each protrusion 1
1a has an upper end edge 11c and a front end edge 11b formed at a substantially right angle, and the upper end edge 11c is set at a position where it bites inward from below between each roller 10b of the feeding roller 10. Further, the front edge 11b is set to be located inward from the front part of the roller 10b, but the upper end corner 13 of the front edge is located at least on the outer periphery of the roller 10b so that it does not protrude above the outer periphery of the roller 10b. Or set it in a position that bites inwards. The upper corner portion 13 of the front edge of each protrusion 11a is defined as a paper discharge outlet for the guide plate 11 and the feed roller 10, and the front edge 11b is defined as shown in FIGS. 2 and 4. It is formed at a required height H and angle θ from the rear end surface of the paper holder 8. The height H is such that the height difference with the paper tray is not too large, and the angle θ is an angle that does not prevent the trailing edge of the paper from falling vertically downward immediately after exiting the paper ejection outlet. For example, it is better to set the angle to 90 degrees or slightly smaller.

Normally, upper and lower integral feed rolls or feed rollers are also provided in the paper discharge section 6 for the original paper 5, but the lower feed roller may be omitted and the same configuration as described above may be adopted. 10' and 11' in FIG. 1 correspond to the feed roller 10 and paper discharge guide plate 11 shown in FIG. 3, and have the same function.

Although the paper discharge guide plate 11 for photosensitive paper shown in FIG. 1 is set separately from the paper holder 8, the two may be formed integrally as shown in FIG. 2.

In the above embodiment, the present invention was applied to the original paper and photosensitive paper discharge sections of a diazo type copying machine, but the present invention can also be applied to the copy discharge section of an electronic copying machine, not just a diazo type copying machine. Of course, it can be implemented with this configuration, but it can also be applied to any paper ejection device, such as a rotary copying machine or other printing machine, as long as it is a device that sequentially sends and receives paper of a specified size onto a predetermined paper tray. It is possible.

(Effect of the invention) As described above, the present invention has the protruding stripes 11a of the paper discharge guide plate 11 placed between the respective rollers 10b of the feeding rollers 10, and the upper edge 11c of the elongated ridges 11a of the paper discharge guide plate 11 being bitten into the position inside the lower part of the rollers 10b. It is formed to a height H so that the front edge upper end corner portion 13 of the protrusion 11a is
The feed rollers and the paper ejection guide plate are disposed on at least the outer circumference of the rollers 10b or are cut into the inside thereof, and the upper corner 13 of the leading edge serves as the paper ejection outlet. The photosensitive paper is given a waveform in the width direction by biting into the tooth-shaped protrusion 11a, and is fed by a strong frictional force. Since the paper is forcibly fed until it exits the corner 13 and falls under its own weight the moment it exits the corner 13, no trailing edge remains of the paper, and it can be reliably received onto the paper tray. Moreover, since the rear end of the paper is not forcibly pushed out, there is no need to worry about the rear end being damaged, curled, or soiled. Furthermore, the structure is simple, easy to implement, and can be implemented at low cost.

[Brief explanation of drawings]

The drawings show an embodiment of this invention, in which Fig. 1 is a longitudinal sectional side view of the main part when the invention is implemented in a diazo type copying machine, Fig. 2 is an enlarged longitudinal sectional side view of the paper ejecting device, and Fig. 3 is an enlarged longitudinal sectional side view of the paper ejecting device. The figure is a front view of the combination of the feed roller and paper ejection guide plate seen from the front, with some sections showing a cross section. FIG. 4 is an enlarged side view of the main part in FIG. 2, FIG. 5 is a view of another embodiment, and FIG. 6 is a side view of a conventional paper ejecting device. 6, 7...Paper discharge section, 8,9...Paper holder, 1
0,10'...Feed roller, 11...Sheet discharge guide plate,
10b...Kolo, 11a...Comb tooth shaped protrusion, 11
b...front edge, 11c...upper edge, 13...upper corner of the front edge.

Claims (1)

[Scope of utility model registration request] A device in which a paper discharge guide plate 11 is provided on the lower side of a feed roller 10 provided on a paper holder of a paper discharge section for original drawing paper, photosensitive paper, etc., and is formed by comb-teeth-shaped protruding strips 11a projecting upward in parallel. , the protrusion 11a of the paper discharge guide plate 11
is formed between each roller 10b of the feeding roller 10 to have a height H so that its upper edge 11c is located inside the lower part of the roller 10b, and the front edge upper end corner 13 of the protrusion 11a is A paper ejection device for a copying machine, which is disposed on at least the outer periphery of the roller 10b or is cut into the inner side thereof, and the leading edge upper end corner 13 serves as a paper ejection outlet.