JPS59190157A - Recording sheet turning-over device - Google Patents

Abstract

PURPOSE:To enable recording sheets to be delivered in order of page, by additionally mounting a pressing member to a first delivery roller positioned ahead of a reversing roller. CONSTITUTION:A recording sheet (b), delivered from a sheet delivery roller 12, passes through a gap on a reversing roller 28 and is moved leftward within a passage 17 by the feed motion of a first delivery roller 18. If the rear end part of the recording sheet (b) runs out of the first delivery roller 18 the rear end part is depressed by a pressing member 31. The driving force of the reversing roller 28 is exerted to forcibly push the rear end part of the recording sheet (b) into a portion where the first delivery roller 18 makes rotating contact with a second delivery roller 32, and the rear end part is transferred to a turning-over guide plate 33. This enables recording sheets to be delivered in order of page onto a delivered sheet tray C.

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 with the paper facing upwards. Therefore, when copying books, etc., it is necessary to align the pages later or reverse the paper from the last page. It is necessary to take measures such as copying.

This is proposed in Publication No. 747. 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.
Only certain paper types 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 is often difficult to take out the recording paper from the tray.

In view of the actual situation of conventional recording paper reversing devices as described above, the present invention provides a structure that can reliably reverse any type of recording paper and does not cause malfunctions such as "jams". It is intended for monetary purposes, and is placed at the bottom of the recorded recording paper that is sent out in a substantially horizontal direction by a first ejection roller that rotates in one direction.
A reversing roller on which the recording paper can be placed is provided, and a pressing member that presses the trailing edge of the recording paper separated from the first discharge roller toward a second discharge roller that cooperates with the @1 discharge roller is attached to the first discharge roller. According to the present invention, the recording paper is reversed by being fed to a reversing guide plate located below the second ejecting roller by the reverse movement of the reversing roller and the second ejecting roller.

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 as required. can.

The electrophotographic copying machine Afl is equipped with an exposure optical device 1 that optically scans an image of a document a, and a paper feed device 3 that feeds recording sheets one by one to a photoreceptor drum 2. A charging electrode 4, a developing device 5, a transfer electrode 6, a separating electrode 7, a static eliminating electrode 8, and a cleaning device 9 are arranged in order in the rotational direction. Therefore, after the toner image of the document a is transferred to the recording paper sheet fed from the paper feeding device 3 to the photosensitive drum 2, the recording paper sheet is transferred to the fixing device 11 by the conveyor belt device 10, and then ejected. The paper is discharged to the paper discharge port 13 by the action of the roller device 12 .

As shown in an enlarged view in FIG. 2, the recording paper reversing device B according to the present invention is connected to a paper discharge port 13 of an electrophotographic copying machine A, and includes a machine frame 14 to which each component is attached.
At the entrance of a passage 170 formed by a pair of substantially horizontal guide plates 15 and 16 fixed to the machine frame 14, there is a first discharge roller 18 that rotates in the direction of the arrow X and an auxiliary roller that rolls into contact with the first discharge roller 18. 19 is the location. The machine frame 14 has a hook 21 that can be removably hooked onto a mounting groove 20 attached to the paper ejection port 13 of the electrophotographic copying machine A. The paper discharge tray C can be directly connected to the electrophotographic copying machine A by hanging it as shown in FIG. and the shaft 2 of the first discharge roller 18
3 supports a swinging member 25 biased by a spring 24, and a roller 26 supported at the free end of the swinging member 25 is connected to the paper ejection roller 27 and the first ejection roller 18 of the paper ejection roller device 12.
Therefore, by connecting the machine frame 14 to the electrophotographic copying machine AVc, the first discharge roller 18
The 1d paper discharge roller 27 is rotated in the direction of the arrow X by being transmitted with the rotation.

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 to form a slight gap between the roller and the roller through which the recording sheet can pass. That is,
As shown in the third figure, the auxiliary roller 29ri is located between the pair of reversing rollers 28, and forms a gap Ll in the width direction of the recording sheet between the auxiliary roller 29ri and the reversing rollers 28. Therefore, $
1 The recording sheet fed leftward from the feeding movement @Vc of the 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 in a so-called "waisted" state. Since it maintains a nearly horizontal state, the paper discharge tray C-L
The contact state will not be visible on the recording paper.

However, the present invention is not limited to the above-described relationship between the reversing roller 28 and the auxiliary roller 29, but the auxiliary roller 29 is positioned directly above the reversing roller 28, and a vertical gap is formed between the two. You may.

Further, a base portion of a pressing member 31 that can come into contact with the upper surface of the recording sheet is swingably attached to the mounting shaft 30 of the auxiliary roller 19. The "v" shaped suppressing member 31 is biased by gravity in the direction of the arrow Y, so that the rear end of the recording sheet touches the first discharge roller 18 and the auxiliary roller 19.
When the recording sheet comes out of contact with the recording sheet, the rear end of the recording sheet 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. Due to the rolling movement of the discharge roller 18 and the second discharge roller 32, "U"
”-shaped reversing guide plate 33. Reversing guide plate 33
is an intake end 33a located at the lower part of the entrance of the passage 17;
A take-out end portion 33b is located below the reversing roller 28, and the take-in portion 33a and take-out end portion 33b are connected by an arcuate intermediate portion 33c.

Then, the lower position of the reversing roller 28, that is, the paper discharge port 34
An auxiliary roller 35 that cooperates with the reversing roller '128 and sends out the reversed sheet of recording paper to the sheet discharge tray C is located at a position facing the reversing roller '128. In order to drive the above-mentioned reversing roller 28, a friction roller 37 is attached to the shaft end of the roller shaft 36 of the second discharge roller 32.
is fixed, and a relay roller 40 that rolls into contact with a shaft end roller 39 of a shaft 38 of a reversing roller 28 is brought into contact with this friction roller 37 . However, the present invention is not limited to such a configuration, and when the recording paper sheet is directly ejected from the reversing roller 28 by the forward rotation of the reversing roller 28, the forward/reverse switching mechanism of the reversing roller 28 may be used. May be incorporated. Note that the end wall 14a of the machine frame 14 of the recording paper reversing device B
K is formed with a mounting groove 41 on which the hook 22 of the paper discharge tray C can be removably hooked.

Since the above-mentioned embodiment has the above-described structure, when aligning the pages of copied recording paper, the electrophotographic copying machine A, the recording paper reversing device B, and the paper ejection tray C are arranged as shown in FIG. Just organize it. That is, the recording sheet discharged from the paper discharge roller device 2 of the electrophotographic copying machine A is sent to the left in the path 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 sheet, the recording paper sheet is only in light contact with the reversing roller 28, so the leading edge of the recording sheet sheet is not disturbed. Move to the left. When the rear end of the recording paper sheet comes off the first discharge roller 18, the rear end of the recording paper sheet is pushed down by the force of the pressing member 31 as shown in the fourth figure, and is pressed against the recording paper sheet. As the driving force of the reverse rotation roller 28 is applied, the rear end of the recording sheet is pushed into the rolling contact area between the first ejection roller 18 and the second ejection roller 32, and
8 and the rotational movement of the second discharge roller 32, the reversing guide plate 3
Sent to 3 and received 1. On the reversing guide plate 33, the recording paper is
The recording paper is deflected in the shape of a letter ``, and is taken out onto the paper output tray C with the image side facing downward.Therefore, the recording paper is placed on the output tray C with the image side facing downward. Since the pages are piled up, the recorded state of the pages can be obtained by simply taking out one trench that maintains the stacked state.

1. When the recording paper reversing device B is not used, the hook 22 of the paper ejection tray C is inserted into the fifth hook 22 of the electrophotographic copying machine.
It will work if you hook it as shown.

In the above embodiment, 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 ejection roller, the folding K (
Any type of recording paper, including thick recording paper, can be used without any problems.
Can be processed.

[Brief explanation of drawings]

FIG. 1 is an overall cross-sectional view of an electrophotographic copying machine according to the present invention, FIG. 2 is an enlarged sectional view of the main parts of the electrophotographic copying machine, and FIG. 3 is a sectional view taken along line T1 in FIG. 2. 4 is an explanatory diagram of the operation of the recording paper reversing device, and FIG. 5 is an overall sectional view of the electrophotographic copying machine when the recording paper reversing device is removed. b... Recording paper, 17... Passage, 18... First discharge roller, 28... Reverse roller, 31...
Pressing member, 32... Second discharge roller, 33... Reversing guide plate. Patent applicant Konishiroku Photo Industry Co., Ltd.

Claims (1)

[Claims] 1) A reversing roller on which the recording paper can be placed is provided at the bottom of the recorded recording paper that is sent out in a substantially horizontal direction by the first ejection roller that rotates in one direction. The first ejecting roller is provided with a pressing member that presses the end toward a second ejecting roller cooperating with the first ejecting roller, and the reverse movement of the reversing roller and the second ejecting roller causes the lower part of the second ejecting roller to A recording paper reversing device characterized in that the recording paper is reversed by feeding the recording paper into a reversing guide plate located at.