JPH0319147B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for reversing recording paper discharged from a copying machine or the like.

In general copying machines, the copied recording paper is normally ejected with the image side facing upward. Therefore, the later the recording paper is copied, the more it is collected in the tray in the upper position. Therefore, when copying books, etc., it is necessary to align the pages later or to remove the last page. It is necessary to devise measures such as copying in reverse from the beginning.

For this reason, Japanese Utility Model Publication No. 43-31747 has conventionally proposed a device that inverts and collects recording sheets discharged upward. However, since this device has a structure in which the leading edge of the recording paper is received by a protrusion on a guide plate and the recording paper is reversed, it has the following drawbacks. First, depending on the size and stiffness of the recording paper used, the leading edge of the recording paper may not catch on the protrusion, so only certain types of paper can be used. In this structure, since the paper is reversed by the paper ejecting movement and the restoring force of the recording paper, the collected state tends to deteriorate, and it often takes time to take out the recording paper from the tray.

In view of the actual situation of the conventional recording paper reversing device as described above, the present invention provides a reversing paper reversal system for an image recording apparatus that records an image on a recording paper and reversely discharges the recording paper onto a paper ejection tray. The apparatus includes a pair of first ejection roller and auxiliary roller that receive and transport the recording paper ejected from the image recording device, and a pair of first ejection roller and auxiliary roller that receive and convey the recording paper ejected from the first ejection roller and the auxiliary roller, and that receive and convey the recording paper ejected from the image recording device. a plurality of reversing rollers that rotate in a direction opposite to the discharge direction and are provided in the axial direction; an auxiliary roller that is provided between the reversing rollers and for pressing the recording paper toward the reversing roller; and the reversing roller and the auxiliary roller. a second ejection roller that receives the leading edge of the recording paper reversely fed by the roller and transports the recording paper reversely by nipping it with the first ejecting roller; a pressing member for guiding between the second ejection rollers; a reversing guide plate for reversing and guiding the recording paper reversely fed by the first and second ejection rollers to a paper ejection port; A recording paper reversing device comprising an auxiliary roller that presses and holds the recording paper against the reversing roller so that the recording paper that is reversely guided on the reversing guide plate is discharged onto a paper discharge tray,
The present invention proposes an image recording device characterized in that the image recording device is detachably installed at a paper discharge port of the image recording device.

Embodiments of the invention will now be described in detail with reference to the drawings.

The illustrated embodiment is a recording paper reversing device B that can be used in an electrophotographic copying machine A if necessary, and this recording paper reversing device B can be installed between the electrophotographic copying machine A and a paper discharge tray C. can.

The electrophotographic copying machine A includes an exposure optical device 1 that optically scans an image of a document a, and a paper feed device 3 that supplies recording paper b one by one to a photoreceptor drum 2.
Around the photosensitive drum 2, a charging electrode 4, a developing device 5, a transfer electrode 6, a separation electrode 7, a static elimination electrode 8, and a cleaning device 9 are arranged in order in the rotational direction. Therefore, from the paper feeder 3 to the photosensitive drum 2
After the toner image of the document a is transferred onto the recording paper b supplied to the recording paper b, the recording paper b is transferred to the fixing device 11 by the conveyor belt device 10. It is discharged to 13.

As shown in an enlarged view in FIG. 2, the recording paper reversing device B according to the present invention includes
3, has a machine frame 14 to which each component is attached, and has a machine frame 14 to which each component is attached.
A pair of substantially horizontal guide plates 15, 1 fixed to
A first discharge roller 18 rotating in the direction of the arrow X and an auxiliary roller 19 rolling in contact with the first discharge roller 18 are located at the entrance of the passage 17 formed by 6. Machine frame 1
4 has a hook 21 that can be removably hooked onto a mounting groove 20 attached to the paper discharge port 13 of the electrophotographic copying machine A, and a hook 22 of the paper discharge tray C is attached to the mounting groove 20.
hook the paper ejection tray C to the electrophotographic copying machine A, and place the fifth
A direct connection can be made as shown. A swing member 25 biased by a spring 24 is supported on the shaft 23 of the first discharge roller 18 , and a roller 26 supported at the free end of the swing member 25 is a paper discharge roller of the paper discharge roller device 12 . 27 and first discharge roller 1
Therefore, by connecting the machine frame 14 to the electrophotographic copying machine A, the first ejection roller 18 is transmitted with the rotational movement of the paper ejection roller 27 and is rotationally driven in the direction of the arrow X. Ru.

At the exit of the passage 17, a reversing roller 28 is located at the bottom of the passage 17 and rotates in the opposite direction to the first discharge roller 18, as will be described later.
An auxiliary roller 29 is provided above the reversing roller 28 and forms a slight gap between the reversing roller 28 and the recording paper b through which the recording paper b can pass. That is, the auxiliary roller 29 is a pair of reversing rollers 28 as shown in the third figure.
, and forms a gap L ₁ in the width direction of the recording paper b between the recording paper b and the reversing roller 28 . Therefore, the recording paper b that is sent to the left by the feeding movement of the first discharge roller 18 and the auxiliary roller 19 is folded into a wave shape between the reversing roller 28 and the auxiliary roller 29, and is folded into a so-called "waisted" state. Since the recording paper b is kept in a substantially horizontal state, it does not come into contact with the recording paper b on the paper discharge tray C.

Further, a base portion of a pressing member 31 that can come into contact with the upper surface of the recording paper b is swingably attached to the mounting shaft 30 of the auxiliary roller 19. The pressing member 31 formed in a “V” shape is urged in the direction of the arrow Y by gravity, so that the rear end of the recording paper b is the contact area between the first discharge roller 18 and the auxiliary roller 19. When the recording paper b comes off, the rear end of the recording paper b is pushed down toward the lower part of the first discharge roller 18.

A second ejecting roller 32 is positioned at the lower part of the entrance of the passage 17 and rolls into contact with the circumferential surface of the first ejecting roller 18 , and the recording paper b that is reversely fed by the force of the reversing roller 28 is transferred to the first ejecting roller 18 . and second discharge roller 32
Due to the rolling contact movement, it is supplied to the "U"-shaped reversing guide plate 33. The reversing guide plate 33 includes an inlet end 33a located below the entrance of the passage 17 and an ejecting end 33b located below the reversing roller 28. are connected to each other by an arcuate intermediate portion 33c. An auxiliary roller 35 is positioned below the reversing roller 28, that is, at a position facing the paper ejection port 34, and cooperates with the reversing roller 28 to send out the reversed recording paper b to the paper ejection tray C.

In order to drive the above-mentioned reversing roller 28, a friction roller 37 is fixed to the shaft end of the roller shaft 36 of the second discharge roller 32, and this friction roller 37 rolls into contact with the shaft end roller 39 of the shaft 38 of the reversing roller 28. Relay roller 40 is contacted. Incidentally, a mounting groove 41 is formed in the end wall 14a of the machine frame 14 of the recording paper reversing device B, on which the hook 22 of the paper discharge tray C can be removably hooked.

Since the above embodiment has the above structure,
When performing page alignment of copied recording paper, the electrophotographic copying machine A, recording paper reversing device B, and paper ejection tray C are
You can organize it as shown in the figure. That is, the recording paper b discharged from the paper discharge roller device 12 of the electrophotographic copying machine A is sent to the left in the passage 17 by the feeding movement of the first discharge roller 18, as shown in the second figure. In this case, although the reverse feeding force of the reversing roller 28 is applied to the recording paper b, the recording paper b is
Since the leading edge of the recording paper b is only lightly touched, the leading edge of the recording paper b moves to the left without being disturbed. and,
When the rear end of the recording paper b comes off the first ejection roller 18, the rear end of the recording paper b is pushed down by the force of the pressing member 31 as shown in the fourth figure, and the rear end of the recording paper b is pushed down against the recording paper b. Since the driving force of the reversing roller 28 is applied, the rear end of the recording paper b is pushed into the rolling contact area between the first ejection roller 18 and the second ejection roller 32, and The rotational movement sends the material to the reversing guide 33. At the reversing guide plate 33,
The recording paper b is deflected into a "U" shape and taken out onto the paper discharge tray C with the image surface facing downward. Therefore, the recording sheets B are stacked on the paper ejection tray C in the order in which they are ejected, with the image side facing downward, so that by simply taking them out while maintaining the stacked state, the recording state in page order can be obtained. be able to.

In addition, when recording paper reversing device B is not used,
The hook 22 of the paper discharge tray C may be hooked onto the mounting groove 20 of the electrophotographic copying apparatus A as shown in FIG.

In the above embodiments, the present invention is applied to an electrophotographic copying machine, but it is obvious that the present invention can be applied to other image recording apparatuses.

As is clear from the above description, according to the present invention, when recording multiple pages of images, page alignment can be performed automatically by simply attaching a recording paper reversing device to the paper ejection port. Since this recording paper reversing device can be easily attached and detached, the organization can be easily rearranged when necessary. It is also possible to use the copying machine as a double-sided copying machine by simply making some modifications to the paper discharge section of the copying machine and allowing the recording paper to be fed back into the copying machine.

In addition, according to the image recording apparatus of the present invention, the reversing roller, which is constantly rotated in the reversing direction, performs reverse feeding of the recording paper and ejecting the paper after reversing. Not only this, but also page alignment can be performed simply by attaching the recording paper reversing device to the paper discharge section of the recording apparatus as necessary.

[Brief explanation of the drawing]

FIG. 1 is an overall sectional view of an electrophotographic copying machine to which the present invention is applied, FIG. 2 is an enlarged sectional view of essential parts of the same electrophotographic copying machine, and FIG. 3 is a sectional view taken along the line - in FIG. Figure 4 is an explanatory diagram of the operation of the recording paper reversing device, Figure 5
The figure is an overall sectional view of the electrophotographic copying machine with the recording paper reversing device removed. A...electrophotographic copying machine, B...recording paper reversing device, C...paper discharge tray, b...recording paper, 13...paper discharge slot, 14...machine frame, 20, 41...mounting groove , 21, 22...Futsuku.

Claims (1)

[Claims] 1. In a reversing paper discharge device of an image recording device that records an image on recording paper and reversely discharges the recording paper onto a paper discharge tray, a pair of paper receiving and conveying sheets discharged from the image recording device are provided. A first ejection roller 18 and an auxiliary roller 19, which receive the recording paper ejected from the first ejection roller 18 and the auxiliary roller 19, rotate in a direction opposite to the ejection direction of the recording paper, and have a plurality of reversing rollers provided in the axial direction. roller 2
8, 28, an auxiliary roller 29 provided between the reversing rollers 28, 28 and for pressing the recording paper in the direction of the reversing rollers 28, 28, and a reverse feed by the reversing rollers 28, 28 and the auxiliary roller 29. A second ejecting roller 32 receives the leading edge of the recording paper and transports the recording paper backward by nipping it with the first ejecting roller 18; A pressing member 31 that guides between the second ejection rollers 32 and a reversing mechanism for guiding the recording paper reversely fed by the first ejection roller 18 and the second ejection roller 32 to the paper ejection port 34. A recording sheet composed of a guide plate 33 and an auxiliary roller 35 that presses and holds the recording sheet against the reversing roller 28 so that the recording sheet that is reversely guided on the reversing guide plate 33 is discharged onto a sheet discharge tray C. A recording paper reversing device for an image recording apparatus, characterized in that the reversing device is removably attached to a paper discharge port 13 of the image recording apparatus.