JPH0319146B2 - - 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 higher it is collected in the tray, so when copying a book, etc., it is necessary to align the pages later or start from the last page. On the other hand, it is necessary to take measures such as copying in reverse.

For this reason, in the past, a device that reversed and collected the recording paper discharged upwards was used.
It is proposed in the publication. 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. With this structure, it is reversed by the paper ejection movement and the restoring force of the recording paper, so
The collection condition tends to deteriorate, and it is often difficult to remove 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 is directed to a reversing sheet ejecting device of a recording device that reversibly ejects recording paper from a recording device that records an image on a recording sheet to a sheet ejecting tray. , a pair of first ejection rollers and an auxiliary roller that receive and convey the recording paper ejected from the recording device, a pair of first ejection rollers and an auxiliary roller that receive the recording paper ejected from the first ejection roller and the auxiliary roller, and a direction in which the recording paper is ejected. A reversing roller that rotates in the opposite direction and is provided in a plurality in the axial direction, an auxiliary roller provided between the reversing rollers and for pressing the recording paper in the direction of the reversing roller, and a reverse feed by the reversing roller and the auxiliary roller. a second ejection roller that receives the leading edge of the recording paper that has been fed and reversely transports the recording paper by sandwiching it with the first ejection roller; a pressing member for guiding between the rollers; a reversing guide plate for reversing and guiding the recording paper reversely fed by the first ejection roller and the second ejection roller to a paper ejection port; and the reversing guide plate. A recording paper reversing device for a recording apparatus is proposed, comprising an auxiliary roller that presses and holds the recording paper against the reversing roller so that the recording paper that is reversed and guided at the top is discharged onto a paper discharge tray. It is something.

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 ejection 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, which 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 at the lower part of the entrance of the passage 17 and an ejecting end 33b located at the lower part of 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, for cooperating 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, the roller shaft 36 of the second discharge roller 32
A friction roller 37 is fixed to the shaft end of the shaft, and a relay roller 40 that rolls into contact with the shaft end roller 39 of the shaft 38 of the reversing roller 28 is brought into contact with the friction roller 37 . Note that the machine frame 14 of the recording paper reversing device B
A mounting groove 41 is formed in the end wall 14a, on which the hook 22 of the paper discharge tray C can be removably hooked.

Since the above embodiment has the above structure,
When aligning the pages of copied recording sheets, the electrophotographic machine A, the recording sheet reversing device B, and the paper discharge tray C may be organized as shown in FIG. That is, electrophotographic copying machine A
Recording paper b discharged from the paper discharge roller device 12 of
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, since the recording paper b is only lightly touching the reversing roller 28, the leading edge of the recording paper b is not disturbed. Move to the left. Then, when the rear end of the recording paper b comes off the first discharge roller 18, the rear end of the recording paper b is moved to the fourth discharge roller by the force of the pressing member 31.
As shown in the figure, since the recording paper b is pushed downward and the driving force of the reversing roller 28 is applied to the recording paper b, the rear end of the recording paper b comes into rolling contact with the first discharge roller 18 and the second discharge roller 32. and is sent to the reversing guide plate 33 by the rotational movement of the first discharge roller 18 and the second discharge roller 32. On 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, a recording paper reversing device that can be assembled into an electrophotographic copying machine is illustrated as an example, but the recording paper reversing device according to the present invention may be incorporated inside a recording apparatus.

As is clear from the above description, according to the present invention, it is possible to obtain a recording paper reversing device that automatically aligns pages, and since the pressing member is attached to the first discharge roller, thick recording paper that is difficult to bend can be obtained. Any type of recording paper, such as paper, can be processed without any problems.

In addition, according to the recording paper reversing device 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. Obtainable.

[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. b...Recording paper, 17...Pathway, 18...First discharge roller, 28...Reverse roller, 31...Press member, 32...Second discharge roller, 33...Reverse guide plate.

Claims (1)

[Claims] 1. In a reversing paper discharge device of a recording device that records an image on recording paper and reversely discharges the recording paper onto a paper discharge tray, a pair of first discharge devices that receive and convey the recording paper discharged from the recording device. a roller 18 and an auxiliary roller 19, and a plurality of reversing rollers 28 that receive the recording paper discharged from the first discharge roller 18 and the auxiliary roller 19, rotate in a direction opposite to the discharge direction of the recording paper, and are provided in a plurality in the axial direction. 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 the reversing rollers 28, 28.
and a second discharge roller 3 that receives the leading edge of the recording paper that has been reversely transported by the auxiliary roller 29 and transports the recording paper backward by being sandwiched between the first discharge roller 18 and the first discharge roller 18 .
2, a pressing member 31 that guides the leading edge of the reversely fed recording paper between the first ejection roller 18 and the second ejection roller 32; A reversing guide plate 33 for reversing and guiding the recording paper to be fed and guiding it to the paper ejection port 34; A recording paper reversing device for a recording apparatus, comprising a reversing roller 28 and an auxiliary roller 35 that presses and holds the recording paper.