JPS6126061A - Duplex copying machine - Google Patents

Abstract

PURPOSE:To reduce the cost and make a copying machine small-sized by providing a paper feeding cassette for duplex copying so that it can be freely moved between the paper receiving position and the paper feeding position. CONSTITUTION:A copying machine body 1 is provided with a photosensitive body 2, a paper feeding device B, and an ejecting roll 10, and a copy paper tray 9 is provided in the exit side of the roll 10 so that this tray 9 is freely moved to positions higher and lower than the exit of the roll 10. A paper supply cassette 14 for duplex copying is provided to move freely between the paper receiving position facing the exit side of the roll 10 and the paper feeding position facing a paper feeding roll 15 for duplex copying. A paper whose one face copying is over is stored when the cassette 14 is moved to the paper receiving position, and a paper whose duplex copying are over is ejected to the tray 9 when the cassette 14 is moved to the form feeding position, thus performing duplex copying. Thus, the structure is simplified, the cost is reduced, and the copying machine is miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a double-sided copying machine capable of copying on both sides of a sheet of paper.

Conventional technology There is a first roller on the exit side of the discharge roller. A second paper conveyance path is provided, and this first paper conveyance path is provided. The first paper conveyance path is continuous with the second paper conveyance path. The second paper tray is provided with a tray, and is configured so that the exit side of the discharge roller can be selected and connected to the first or second paper conveyance path by a switching gate such as a switching claw, and single-sided copy cylinder paper can be transferred to the first or second paper transport path. The second paper tray discharges the paper to the tray, and the single-sided copy tube paper is sent to the photoreceptor again to copy on one side of the remaining sheet to make double-sided copied paper, and the first paper tray discharges the double-sided copied paper to the tray. A double-sided copying machine designed to

Problems to be solved by the invention No. 1. Since a second paper conveyance path and a switching gate are required, the mechanism is complicated and costs are high, and a large installation space is required, making the entire copying machine large.

Since the paper is selectively fed into the first or second paper conveyance path by the switching gate, paper jams are likely to occur in that area, and paper jams are likely to occur in that area. Since paper may jam in the second paper conveyance path as well, the operation of stopping the copying machine and removing paper is frequent, resulting in poor operating efficiency of the copying machine.

1st. Removal of paper jammed in the second paper transport path.In particular, since the second paper transport path is located below the first paper transport path, it is troublesome to remove paper jammed in the second paper transport path. It is.

Means and Effects for Solving the Problems The copy paper tray is provided with a tray movable above and below the exit of the ejection port chive, and the duplex paper feed cassette is mounted on the paper tray facing the exit side of the ejection roller. is movable between the position and the paper feeding position opposite to the duplex paper feed roller, the copy paper tray has the plate in the upper position, and the duplex paper feed cassette has the paper tray in the single-sided position. The copied paper is ejected to the duplex paper feed cassette, the copy paper tray is placed in the lower position, and the duplex paper feed cassette is placed in the paper feed position, and the single-sided copied paper is sent to the photoreceptor for duplex copying. The copy paper tray is designed to eject the double-sided copied paper onto a tray.

Embodiment The copying machine main body 1 has an upper wall 1α, a lower wall 1b, and both side walls (c, l(
Z and both end walls 1g and If form a box-like structure, inside which a photoreceptor 2 is provided, and around the photoreceptor 2 are provided various copying devices (not shown).

The paper i paper force J set 4 is inserted through the opening 3 of one side wall IC, the paper feed cassette receiver is set on the stand 5, and the feed roller 6 feeds the paper to the first paper transport path 7. A paper feeding device B is configured such that the paper is fed.

An upward opening δ is formed in the other side wall 1d, and this opening ε
The copy paper tray is provided with a plate 9, whose base end 9α'
faces the inside of the copying machine main body 1, faces the exit side of the discharge roller 10, and has a bin 11 fixed to it.
1 has both end walls.

1f, and the tip 9b faces the opening edge 8α of the other side wall 1d.
A guide 13 is provided on the lower surface 9C.

14 is a double-sided paper feed cassette), and a discharge roller 10
The paper tray facing the exit side is movable between the paper feed roller 15 for double-sided printing and the paper feeding position placed on the stand 16. Both ends of a cable 190 wound around the cable 18 are fixed, and by driving the drive pulley 17, the paper receiver moves to the paper feed position and the guide 20 is provided.

This guide 20 has an upper surface 20a that interferes with the lower surface 13α of the guide 13, and an oblique side surface 20b that interferes with the side surface +3b of the guide 13.

Reference numeral 21 denotes a second paper transport path, which is continuous with the first paper transport path 7 in the middle.

22 is a fixing device.

Next, the operation will be explained.

In the case of single-sided copying, the double-sided paper feed cassette 14 is placed in the paper tray position, as shown in FIG.

Accordingly, the upper surface 2oα of the guide 2o is the lower surface 131 of the guide 13! The plate 9 of the copy paper tray is pushed upward, and the base end qrt is positioned above the exit side of the discharge roller 10.

Then, the paper A fed by the feeding device B is copied on one side by a conventionally known copying process, and the one-sided copy paper A' is discharged by the discharge roller 10 to the double-sided paper feed cassette 14.

When the driving pulley 17 is driven in the direction of the arrow in the state shown in FIG. 1, the cable 19 is pulled in the direction of the arrow, and the double-sided paper feed cassette 14 is moved to the paper feeding position as shown in FIG.

Then, by driving the double-sided paper feed roller 15, the single-sided copied paper is fed to the second paper conveyance path 21, the remaining paper is copied onto one side of the remaining paper, and the paper is ejected 9 by the ejection roller 10.

At this time, since the guide 13 of the tray 9 and the guide 20 are separated from each other, the bottle 11 slides downward under its own weight along the guide groove 12, and the base end 9a of the copy paper tray is positioned below the exit of the discharge roller 10. Therefore, the double-sided copy paper A' is discharged into the copy paper tray 9.

Further, in the state shown in FIG. 2, when the driving googly 17 is driven in the direction of the arrow and the cable 19 is pulled back in the direction of the arrow, the double-sided paper feed center 14 moves toward the paper tray position.

As shown in Figure 3 (α) to (dl), the guide 2
When the side surface 20b of the guide 2o interferes with the side surface +3b of the guide 13 and the guide 13 is successively pushed up by the slope, and the paper tray is in the position, the top surface 2oα of the guide 2o is placed on the bottom surface 13α of the guide 13, and the copy paper tray is placed in the tray. Push 9 upwards and move it.

At this time, the bottle 11 slides upward along the guide inlet 12.

In this way, by moving the double-sided paper feed cassette 14 between the paper receiver position and the paper feeding position, it is possible to feed single-sided copied paper to the photoconductor 2, and also to make double-sided copies. Since the copy paper tray can discharge the completed paper to the tray 9, double-sided copying can be performed.

Furthermore, since there is no need to provide a plurality of paper conveyance paths or switching gates on the exit side of the discharge roller 10, the structure is simple and the cost is low, and since no installation space is required, the entire copying machine can be made compact.

Further, as shown in FIG. 3(d), since the plate 9 of the copy paper tray can be rotated upward about the pin 11, it is easy to remove jammed single-sided copied paper.

Furthermore, since the copy paper tray can move up and down on the tray 9 by utilizing the movement of the duplex paper feed cassette 14, the 'U drive source 1
It can be done as one.

In the above embodiment, the guide 13 and the guide 20 are provided, but the plate 9 of the copy paper tray may be moved up and down by a single drive source, and the plate 9 may be moved up and down as shown in FIGS. 4 and 5. The cable 19 is wound around the rotating pulley 30 as shown in FIG. The pin 11 may be moved up and down by the movement of the cable 19.

Effects of the Invention By providing a plurality of paper conveyance paths and switching gates on the exit side of the ejection roller 10, single-sided copied paper can be ejected to the duplex paper feed cassette 14, and double-sided copied paper can be transferred to the copy paper receiving cassette. Since it is possible to eject the paper to the tray 9 and feed the single-sided copied paper to the photoreceptor 2 again, the structure is simple and cost-effective, and the entire copying machine can be downsized, and paper jams are less likely to occur. Therefore, the operating efficiency of the copying machine will not deteriorate.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a cross-sectional view of a single-sided copy state, FIG. 2 is a cross-sectional view of a double-sided copy state, and FIG. 3 is a cross-sectional view of a double-sided copy state.
I,, (bl, IC), [dl is an operation explanatory diagram, and FIGS. 4 and 5 are a front view and a perspective view of main parts of the second embodiment. 1 is the copying machine body, 2 is the photoreceptor, 9 is the copy paper tray, 1
0 is a discharge roller, 14 is a double-sided paper feed cassette, 15
is a double-sided paper feed roller.

Claims (1)

[Claims] A copying machine body 1 includes a photoreceptor 2, a paper feeder B, and a discharge roller 10.
A copy paper tray 9 is provided on the exit side of the ejection roller 10 so as to be movable above and below the exit of the ejection roller 10, and a double-sided paper feed cassette 14 is provided on the exit side of the ejection roller 10. A double-sided copying machine characterized in that the double-sided copying machine is provided movably between a paper receiving position facing the exit side of the machine and a paper feeding position facing the double-sided paper feeding roller 15.