JPH03293255A - Paper handling device - Google Patents

Abstract

PURPOSE:To perform the removal handling of jammed paper in an easy manner by enabling a paper conveying part to be opened to the outside of a device body, namely, making at least a first paper conveying passage able to be divided and opened. CONSTITUTION:When jammed paper caused in a paper conveying part (paper discharge part) 50 is removed. this paper conveying part 50 is opened to the outside of a device body 1, and further a first paper conveying passage (one-side conveying passage) A is divided and opened, whereby the jammed paper in such a paper conveying passage, where frequency is the highest in use, is removed. Moreover, with the open of this first paper conveying passage A, both inlet parts of the second and third paper conveying passages (duplex, multiplex conveying passages) B, C are also opened and jam handling takes place.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a paper processing device that performs predetermined processing on paper and outputs it, such as transfer paper, electrostatic recording paper, photosensitive paper, printing paper, printing paper, etc. Image forming devices such as copying machines, electrostatic printers, printing machines, etc. that perform image formation and printing on paper, etc., and perform coating processing, laminating processing, heating processing, and perforation on paper as processing materials. The present invention relates to various paper processing devices that process and output paper.

In more detail, there is a first paper transport magnetic path that guides the paper that has passed through the paper processing section out of the apparatus, and a paper refeed transport section that reintroduces the paper that has passed through the paper processing section into the paper processing section. 2nd to lead
The present invention relates to a paper processing device having a paper transport section including a paper transport path and a third paper transport path that guides the paper that has passed through the paper processing section to the paper refeed transport section without reversing it.

(Prior Art) As a specific example of this type of paper processing device, FIG. A schematic configuration of an example of a copying apparatus using a V-type electrophotographic process for copying is shown.

Reference numeral 1 designates an apparatus housing, and 2 designates a rotating drum-type electrophotographic photoreceptor (image carrier, hereinafter referred to as tram) that is driven to rotate at a predetermined circumferential speed (process speed) in the clockwise direction of the arrow. .

1 (During the rotation process, the surface of the drum 2 is uniformly charged with a predetermined polarity and potential by the charger 3, and then exposed to target image information by the image exposure means 4, so that the surface of the drum 2 is uniformly charged with a predetermined polarity and potential. An electrostatic latent image of image information is formed.

The image exposure means 4 in the apparatus of this example is a known document image slit exposure mechanism with a fixed document table and a movable optical system. Reference numeral 4a designates a fixed document table glass, O a document placed on the glass with the image surface facing upward according to a predetermined placement standard, and 4b a document holding cover.

4c and 4d are document illumination lamps and a movable first mirror;
These are driven forward at a speed V along the glass-F surface from the home position on the left side of the glass to the right side of the glass under the original glass glass 4a, and when they reach a predetermined end point of the forward movement, they are driven backward. .

Reference numerals 4e and 4f are second and third movable mirrors, which move forward at a speed of V/2 in conjunction with the rhythm of the lamp 4c and the first movable mirror 4d, and move back in conjunction with the backward motion. . 4g/4h
・41.4J indicates an imaging lens, a fixed first mirror, a fixed second mirror, and a fixed third mirror.

The latent image formed on the drum 2 surface is then transferred to the first or second developing device 5.
・It is visualized as a toner image by the action of step 6.

On the other hand, the first or second paper cassette 8 or 9 of the paper feeding mechanism section
From there, paper (transfer paper) PI or P2 is separated and fed one by one by the action of paper feed roller 8a or 9a or separation roller pair 8b or 9b, passes through sheet bus (paper conveyance path) 10 or 11, and is transferred to registration roller pair. 12 and the sheet bus 13 to the transfer section f4a between the drum 2 and the transfer charger 14 at a predetermined timing. Then, in the transfer section 14a, the toner image on the drum 1 side is transferred onto the surface of the fed paper.

The paper to which the toner image has been transferred is separated from the drum 1 by a separation charger 15 and introduced into a fixing device 17 by a conveyance device 16.

After the toner image has been transferred, the surface of the drum is cleaned by a cleaning device 7 and repeatedly used for image formation.

The fixing device 17 in this embodiment is a heat roller type fixing device, and the fixing rollers (thermal rollers) 17 on the − side are in pressure contact with each other.
A and a lower pressure roller (backup roller) 17b, and the paper that has undergone the toner image transfer in the transfer section 14a is introduced between the pair of rollers 17a and 17b with the transferred toner image surface facing upward. and passes through the nip between the pair of rollers.

During the passing process, the transferred toner image is permanently activated on the paper surface by the heat of the fixing roller 17a and the pressure of the pair of rollers.

17c is a web unit for removing the offset toner from the fixing roller; 18 and 19 are web means for removing the offset toner from the fixing roller;
The paper upper separation claw and the lower paper separation claw are disposed with their respective tips in contact with or very close to the surface 7b.

In the apparatus of this example, the image transfer section 14a and the fixing section 17 are paper processing sections.

(1) Single-sided copying When this mode is selected and specified, the paper that has come out of the fixing device 17 (single-sided copied paper) is separated by the lower separation claws 18 and 19.
Between → Upper and lower kite plates 2o and 21 → First discharge roller pair 2
2 and 23, a person is placed between the guide plate 25 and the top side of the first flapper 24 in the first switching position shown by the solid line in the partially enlarged view of FIG. The paper is completely ejected to the ejection tray 31 outside the apparatus through the second flapper 26 and between the second ejection roller pair 29 and 30 which are driven in normal rotation in the sheet ejection direction. .

In this example apparatus, the paper transport path from the upper and lower separation claws 18 and 19 to the ejection tray 31 is the first paper transport path (
Single-sided conveyance path) A.

The second flapper 26 is made of a light material and is normally in a rotational angular position intersecting the first flapper 24 and blocking the first paper conveyance path A, as shown by the solid line. When the paper passes through, it is easily pushed up by the leading edge of the passing paper and assumes the rotational angle position shown by the two-dot chain line in FIG. 7, and the paper passes between the first flapper 24 and the second flapper 26 without any hindrance. The second discharge roller pair 29 and 30 are reached.

When the trailing edge of the paper passes between the first flapper 24 and the second flapper 26, the second flapper 26 changes from the push-I = rotation angle position shown by the two-dot chain line to the original solid line (rotation). It naturally returns to the angular position using its own weight moment.

Reference numeral 27 denotes a paper detection lever, and when the paper enters between the first flapper 24 and the kite plate 25 from the first ejection roller pair 22 and 23, it is kicked by the leading edge of the paper and rotates as shown by the two-dot chain line in FIG. The turning angle position is maintained until the rear end of the sheet passes through the lever 27. During this rotation angle posture, the other arm of the lever is away from the optical sensor 28, and it is detected that the paper is passing through. The leading edge of the paper is detected when the lever 27 is turned on the leading edge of the paper, and the trailing edge of the paper is detected when the paper passes the position of the lever 27 and the lever returns to its original rotation angle position.

(2) Double-sided copying When this mode is selected and designated, the paper that has been copied on one side after leaving the fixing device 17 is discharged and conveyed to the output tray 31 in the first paper conveyance path A, and the trailing edge of the paper is is detected by the detection lever 27 and the optical sensor 28, after it passes between the first flapper 24 and the second flapper 26, and before it finishes passing between the second discharge roller pair 29 and 30. When a corresponding predetermined period of time has elapsed, the control system switches the second discharge roller pair 29 and 30 from normal rotation drive to reverse rotation drive.

By switching the drive of the second ejection roller pair 29 and 30 from normal rotation to reverse rotation, the single-sided copy paper is completely pulled into the apparatus, this time with the trailing edge first, before being ejected into the ejection tray 31. (switch hack conveyance), and is guided downward by the lower left guide slope of the second flapper 26 which has returned to the rotation angle posture shown by the solid line, and is then guided downward between the lower left guide slope of the 17th flapper 24 and the kite plate 32. Furthermore, it passes in order between the kite plates 32 and 33, between the guide plates 33 and 34, and between the guide plates 35 and 36, and reaches the pair of conveyance rollers 37 and 38.

In this example device, before the paper sent out to the ejection tray 31 is completely ejected as shown in
u [Switch-hacked by the output roller pair 29 and 30 and pulled into the device, and then transferred to the conveying roller pair 37 as shown in 1-
- The path leading to 38 is the second paper transport path (double-sided transport path) B.

The paper that has reached the pair of transport rollers 37 and 38 from this second paper transport path B is made up of a plurality of guide plates and a plurality of pairs of transport rollers, and reaches the pair of registration rollers 12 described above. The sheet is reintroduced from the registration roller pair 12 and the sheet bus 13 to the transfer section 14a, which is a sheet processing section, at a predetermined timing via the flow path.

In this case, the sheet that has already been copied on one side and has been reintroduced into the transfer section 14a is reversed by the switch pack by the second sheet transport path B described above, so that the sheet that has been copied on one side (the surface opposite to the side that has already been copied (paper surface, first side) Since the back side of the paper (the second side) faces the second side of the drum and is reintroduced into the transfer unit 14a, the toner image is transferred to the back side of the paper, and from then on, the same process as in the one-sided copying mode is performed. Conveying device 16 → Fixing device 17 →
The paper with both sides copied is discharged through the first paper transport path A to the discharge tray 311-.

(3) Multiple copying When this mode is selected and specified, the paper that has been copied on one side after leaving the fixing device 17 is separated between the upper and lower separating claws 18 and 19 → between the upper and lower guide plates 20 and 21 → between the first discharge roller 22・23
between the guide slope on the lower right side of the first flapper 24, which has been switched to the second switching posture indicated by the two-dot button line in the partially enlarged view of FIG. 7, and the guide plate 33; 3
2 and 33, between kite board 33 and kite plate 34, and between guide plate 35 and kite plate 36, and conveyor roller pair 37.
・It reaches 38.

In the apparatus of this example, the paper that has exited the fixing device 17 is transferred from the upper and lower separating claws 18 and 19 to the pair of transport rollers 37 and 3 as shown in the figure.
The path leading to 8 is the third paper conveyance path (multiple conveyance path)
It is C.

The paper from this third paper conveyance path C to the pair of conveyance rollers 37 and 38 passes through the refeeding conveyance section, and then from the pair of registration rollers 12 and the sheet path 13 to the transfer section 1, which is a paper processing section.
4a at a predetermined timing.

In this case, the paper that has already been copied on one side is reintroduced into the transfer unit 14a with the side that has already been copied facing the second side of the drum, and 1. 1 toner image transfer is performed (multiple copying). From then on, as in the case of the single-sided copying mode, the paper on which multiple copies have been copied is transferred through the transport path 16 → fuser 17 → first paper transport path A. is discharged onto the discharge tray 31.

(Problems to be Solved by the Invention) As shown in G, there are three paper conveyance paths A-B-
The paper conveying section (discharging section) 50 including C is complicated and consists of a plurality of flappers, kite plates, and the like. For this reason, it is a place where paper jams (paper jams) are likely to occur.

Therefore, in order to remove the jammed paper (jam processing) when a jam trouble occurs, the paper transport section 50 including the first to third paper transport paths A-B-C is connected to the hinge shaft 51.
It is assembled into a chassis 52 that can freely rotate with respect to the apparatus main body 1 around the center, and the entire paper conveying section 50 can be opened by pulling it down approximately 90 degrees out of the apparatus main body around the hinge shaft 51 as shown in FIG. The structure is as follows.

As a result, the paper is transferred from the fixing device 17 to the paper conveyance section 50.
23) and the paper delivery section from the ejection tray 31 to the second paper feed path B (the portion between the ejection tray 31, the second ejection roller pair 29 and 30, and the second paper feed path B). ) etc. to easily remove jammed paper.

However, as shown by the solid line Pa in FIG.
, the leading edge of the paper is between the first flapper 24 and the second flapper 2.
6, the trailing edge of the paper is caught between the first pair of ejection rollers 22
・If the paper is jammed in a state where the paper 23 is pulled in, or if the leading edge of the paper is between the guide plate 32 and the guide plate 33 in the third paper transport path C as shown by the two-dot chain line pb in FIG. ,
Or, if the trailing edge of the paper is caught between the kite plate 33 and the kite plate 34 and is jammed in a state where it is pulled in by the first pair of ejection rollers 22 and 23, place your finger on the upper and lower separating claws 18. -19 into the first paper conveyance path A and the first
Jammed paper P coming out from between the ejection roller pair 22 and 23
Jam paper P a Q by pinching the trailing edge of paper a or pb.
The jam is cleared by pulling out the paper Pb, but in this case, only a small portion of the trailing edge of the paper comes out from between the first discharge rollers 22 and 23, making it difficult to grasp the paper and clear the jam.

In addition, upper and lower separation claws 18 and 19, guide plates 20 and 21,
The first discharge roller pair 22, 23, etc. are located near the fixing device 17, so they have heat, and the separation claws 18, 1
9 has a sharp blade, making it even more difficult to handle jams.

Further, in the case where the paper transport section 50 includes transport roller pairs 37 and 38, the first to third paper transport paths A-B-C are the first ejection roller pair 22 and 23 and the second ejection roller pair 29 and 3.
0, the paper is completely closed by the pair of transport rollers 37 and 38, and if the paper jams during this period, it becomes even more difficult to clear the jam, and a service call may be required.

Therefore, the guide plate 33 is opened and rotated outward around m33a as shown by the two-dot chain line in FIG. Is there a proposal to open path B-C to easily remove jammed paper in paper transport path B-C? It remains difficult to remove from paper.

In addition, due to the high requirement for positional accuracy, the sufficiently separated jaw 18 or the lower separating jaw 9 may be used either by itself or by the chi 1 that includes it.
~There is nothing to open the board.

An object of the present invention is to facilitate the removal of jammed paper from the first paper transport path A.

(Means for Solving the Problems) The present invention is a paper processing device that performs predetermined processing on paper, and includes a first paper transport path that guides the paper that has passed through the paper processing section out of the device, and a paper processing device. a second paper conveyance path that re-introduces the paper that has passed through the paper processing section to the paper refeeding conveyance section and guides the paper that has passed through the paper processing section without inverting it; The apparatus has a paper transport section including a third paper transport path leading to the transport section, the paper transport section can be opened to the outside of the apparatus main body, and at least the first paper transport path can be divided and opened. This is a paper processing device.

Further, the present invention provides a paper processing device, which is characterized in that the direction in which the paper transport section is opened and the direction in which the first paper transport path is divided and opened are the same.

(Function) To remove jammed paper that has occurred in the paper transport section, open the paper transport section to the outside of the main body of the apparatus, and further divide and open the first paper transport path, so that the most frequently used paper transport path can be removed. Jammed paper can be easily removed and disposed of.

Furthermore, by opening the first paper conveyance path, both the second and third paper conveyance paths are also released, and the jam handling performance is greatly improved.

6 (Example) <Example> (Figs. 1 to 3) Fig. 1 is a schematic diagram of the main part (paper transport section) of an embodiment of the device according to the present invention, and Fig. 2 is a schematic diagram of its open state. , FIG. 3 is a schematic diagram of the state in which the first paper conveyance path is further opened.

Components and parts common to those of the apparatus shown in FIGS. 6 to 8 are designated by the same reference numerals and will not be described again.

In this example device, the first to third paper conveyance paths A-B-
A chassis 52 allows the paper conveying section 5o, including the pair of conveying rollers 37 and 38, and the guide plate 39, to rotate freely relative to the apparatus main body 1 around the hinge shaft 51. As shown in FIG. 2, the entire aix section 5o can be opened by pulling it down approximately 90 degrees to the outside of the apparatus main body around the hinge 1111bst.

Also, the forces in Figures 6 to 8, A1 to Plate 2o, 25
In this example device, from the front claw 18 to the second roller pair [outer roller pair 2]
A series of kite plates 53 lead to the ten rollers 3o at 9 and 30, and this kite plate 53 connects to the second discharge roller pair 29 and 30.
It is freely rotatable with respect to the chassis 52 around a hinge 'It'l+' 54 fixed to the chassis 52 near the -L roller 30.

The upper and lower separating claws 18 and 19 are connected to this kite plate 53.
- Separation claw 18, first discharge port - upper roller 23 of pair 22 and 23, paper detection lever 27 and optical sensor 28, second flapper 26, and roller 3o of second tJ1 output roller pair 29 and 30. The mounting is supported in a predetermined arrangement.

The guide plate 53 is constructed by the spring pressure of a torsion coil spring 55 which is fitted onto the hinge shaft 54, one spring leg is engaged with the outer surface of the kite board 53, and the other spring leg is engaged with a pin 56 implanted in the chassis 52. ;; ; Rotating in the 9 o'clock closing direction (hour, ;1 direction), and in the free state, the tip group 153a of the guy 1 to the plate 53 is fixed to the chassis 52. The cut-and-raised receivers provided on both sides of the leading ends of the plates 1 to 21 abut against the pieces 21a and are held in the closed state of the receivers 11- with accuracy.

In this closed state, the fixing roller 17 is fully released by the pawl 18.
a, and the upper roller 23 of the first ejection roller pair 22 and 23 is positioned opposite to the lower roller 22, the second flapper 26 or the first flapper 24, and the second Troller 30 or lower roller 2 of roller pair 29/30
9, the upper and lower separating claws 18 and the ejection tray 31 are kept in the correct position and facing each other.
A first paper conveyance path (single-sided conveyance path) A leading to is formed.

When a paper jam trouble occurs in the paper transport section 50, the entire paper transport section 50 is opened by pulling it down approximately 90 degrees out of the main body of the apparatus as shown in FIG. 2 around the hinge shaft 51.

Next, the kite plate 53 is opened and rotated outward in the same direction as the opening direction of the paper conveying section 50, as shown in FIG. 3, about the hinge M54 against the spring pressure of the torsion coil spring 55. As a result, the first paper conveyance path A becomes largely divided and opened. Therefore, the paper Pa jammed in the first paper transport path A can be easily removed and processed.

Furthermore, by opening the first paper transport path A, both the second paper transport path B and the third paper transport path C are left wide open. Jammed paper can also be easily removed.

After removing the jammed paper, the kite plate 53 is returned to the closed state, and the paper conveying section 50 is returned to the closed state with respect to the apparatus main body 1.

The torsion coil spring 55 is attached to the kite board 53 in the free state.
can be stably and reliably held in the normal closed state,
Set the spring pressure to an appropriate level that does not create too much resistance when the operator opens and rotates.

In this example, when the apparatus returns the guide plate 53 to the closed state and closes the paper conveying section 50 in the apparatus body after clearing the jam, when the kite plate 53 remains incompletely closed due to, for example, foreign matter being caught in the apparatus. The shape of the front and back of the apparatus main body is configured so that when the paper transport section 50 is enclosed in the apparatus main body 1 and rotated, interference occurs with the apparatus main body and the paper transport section 50 can only be closed.

<Example 2> (Figures 4 and 5) In the case of the device of this example, the kite board 5 in the previous example was used.
A hinge l1qlI54, which is the center of rotation of the paper transport unit 50, is fixed to the chassis 52 near the bisecting claw 18, and the guide plate 53 rotates around this hinge shaft 54 in a direction opposite to the opening direction of the paper transport section 50. It can be opened and rotated (counterclockwise).

In this example device, the kite board 53 in the previous example is
A spring portion 55 is provided to actively close and rotate the members 18, 23, 27, and the like in the state shown in FIG. 28・
26 and 30 (closing/closing rotational moment in the counterclockwise direction due to its own weight around the hinge @ J54 of the guide plate 53 itself supported by one digit) ~ holds the kite plate 53 in the closed state. be done.

That is, in this closed state, the -4-separation claw 18 is positioned opposite to the fixing roller 17a at a normal position, and the tenth roller 23 of the first discharge roller pair 22 and 23 is opposed to the second roller 22 with respect to the lower roller 22. For the flapper 26 or the first flapper 24,
The ten rollers 30 of the second ejection roller pair 29 and 30 are kept facing the lower roller 29 at their proper positions, and the first paper is delivered from the upper and lower separating claws 18 and 19 to the ejection first tray 31. A conveyance path (single-sided conveyance path) A is formed.

In the device of this example, when the kite plate 53 is in the closed state, the tip portion 53a of the guide plate 53 on the side of the claw 18 that is sufficiently separated abuts against the portion 17e of the receiver provided on the front and rear side plates 17d of the fixing device 17, so that the position is guaranteed. There is.

As a result, the position of the upper separating claw 18 with respect to the fixing roller 17a, the position of the upper roller 23 with respect to the lower roller 22,
The position of the flapper 26 with respect to the first flapper 24 and the position of the upper roller 30 with respect to the lower roller 29 are both accurately positioned.

In particular, the positional relationship between the sufficiently separated claw 18 and the fixing roller 17a is important.As described above, the positioning of the kite plate 53 or the fixing unit 17 is performed, so the granularity is very high.

When there is a paper jam problem in the paper transport section 50, the entire paper transport section 50 can be opened by pulling it down approximately 90'' to the outside of the apparatus main body 1 around the hinge shaft 51 as shown in Fig. 5. do.

The kite plate 53 opens and rotates by pulling down the paper conveyance unit 50 and falls under its own weight around the hinge QII 54 (as shown by the two-dot chain line). The conveying path A can be largely divided into an open state (shown by solid lines), and the paper Pa jammed in the first sheet conveying path A of the secondary lever can be easily removed and disposed of.

Furthermore, since the second and third paper transport paths B and C are also largely opened, it is easy to remove sheets jammed in these paper transport paths B and C.

After clearing the jam, remove your hand from the guide plate 53 and close the paper conveying section 50 back to the main body 1 of the apparatus, so that the plates 1 to 53 are also cleared.
Closing and rotating with 51 double moment and finally chi 1 to board 5
The tip portion 53a of No. 3 or the receiver on the side of the fixing device 17 is pushed into the portion 17e and returns to the closed state shown in FIG. 4.

In this case, in the device of this example, if the kite plate 53 is in an incompletely closed state due to something like being bitten by a monster, it is necessary to use the electric means (
It is designed to be detected and warned by a microswitch, optical sensor, etc.

To the first paper conveyance path that can be divided and opened 〇 The position guarantee of the rotating kite plate 53 in the closed state is limited to the means in Embodiments 1 and 2. Other means, such as the sufficient release claw 18, etc. 1 (It is not fastened to the plate 53, but is fastened with a clasp, but there is a means on the main body side of the apparatus that allows it to be positioned in the correct position when the paper conveying section 50 is closed in the main body 1 of the apparatus. may be provided.

3 (Effects of the Invention) As described above, according to the present invention, it is possible to easily remove jammed paper in the first paper conveyance path, which is most frequently used in this type of paper processing device. Furthermore, by dividing and opening the first paper transport path, the second and third paper transport paths are opened on the 1-1 side, making it easier to remove jammed paper from those paper transport paths. This will greatly improve jam handling.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the main part (paper transport section) of an embodiment of the apparatus. FIG. 2 is a schematic diagram of the open state. FIG. 3 is a schematic diagram of a state in which the first paper conveyance path is further opened. FIG. 4 is a schematic diagram of the main part (paper transport section) of another embodiment of the apparatus. 'ir, Figure 5 shows a schematic diagram of its open state. FIG. 6 is a schematic configuration diagram of an example of an electrophotographic copying device as a specific example of a paper processing device. 4 FIG. 7 is an enlarged view of the paper conveyance path section. FIG. 8 is a schematic diagram of the open state. 1 is an apparatus main body, 14a is an image transfer section, 17a is a fixing device, 5
0 is the Mtj transport section (paper discharge section), A-B and C are the first to third paper transport paths (single-sided transport path, double-sided transport path, multiple transport path), and D is the paper refeed transport section. Ward U transfer

Claims (2)

[Claims] (1) A paper processing device that performs predetermined processing on paper, and includes a first paper transport path that guides the paper that has passed through the paper processing section out of the device, and a paper processing path that returns the paper that has passed through the paper processing section to the paper processing section. a second paper transport path that inverts and guides the paper to the paper refeed transport unit to be introduced, and a third paper transport path that guides the paper that has passed through the paper processing unit to the paper refeed transport unit without reversing it. What is claimed is: 1. A paper processing apparatus, comprising: a paper transport section including: the paper transport section can be opened to the outside of the apparatus main body; and at least a first paper transport path can be opened in sections. (2) The paper processing apparatus according to claim 1, wherein the direction in which the paper transport section is opened and the direction in which the first paper transport path is divided and opened are the same.