JPS6344651B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying machine that copies an original image on one side of a sheet of paper used as a copying material, then reverses the paper and then outputs it, or a double-sided copying machine that copies the original image on the other side of the sheet after reversing the paper. The present invention relates to a paper reversing/folding device that adds a paper folding function to a paper reversing device used in machines, etc.

The above-described copying machine is configured to include a paper reversing device on the discharge side of a normal copying path so that the paper can be reversed.

On the other hand, when using large-sized paper (for example, A3 size) in a copier, the paper may not be able to be transported within the sorter due to curling, stiffness, etc., and the sorter may not be able to be used. Moreover, even if it were possible to use a sorter, the transport route would become long, the bins would become long, and the sorter itself would become very wide, which is undesirable in terms of cost and installation space.

Therefore, it is possible to use a narrower sorter by folding the copied paper in half after fixing to reduce the actual area (size) and making it more rigid before feeding it into the sorter. It is necessary to install a new copying machine, which increases the size of the entire copying machine, which is undesirable in terms of installation space and cost.In addition, in the case of small-sized paper, it is not necessary to fold it in half, and there is no need to fold it in half. Sometimes paper jams occur.

The present invention has been made in view of the above circumstances, and its purpose is to reverse the fed paper and eject it, to reverse the paper and then feed it into the copying machine again for double-sided copying, and to avoid reversing the paper without reversing it. To provide a paper reversing and folding device capable of folding the paper in half and discharging it, or discharging the paper in the same posture without reversing it.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall schematic explanatory diagram of a copying machine B equipped with a sorter A, and a photosensitive drum 2 is provided in the copying machine main body 1.
is provided around the photosensitive drum 2, and a charger 3,
An exposure slit 4, a developing device 5, a transfer device 6, a freer 7, etc. are arranged in sequence, and the document surface on the platen 8 is exposed by an exposure optical system 10 equipped with a lens 9, and the document image is transferred to the exposure slit. 4 onto the photosensitive drum 2, developed by the developing device 5, transferred to the paper conveyed along the paper conveyance path 11 by the transfer device 6, and transferred the transferred paper to the vacuum transport (export path) 12. It is configured such that the image is sent to the fixing device 13 along the same line.

14 is a lower tray, the paper set on the lower tray 14 is sent to the paper transport path 11 by a lower paper feed roll 15, and 16 is an upper tray, the paper set on the upper tray 16 is sent to the paper conveyance path 11. is sent to the paper conveyance path 11 by the upper paper feed roll 17.

Reference numeral 18 denotes a paper reversing/folding device provided between the fixing device 13 and the sorter A, and a double-sided copying tray 19 faces the paper reversing/folding device 18. It continues to the paper conveyance path 11 via a double-sided copying feed roll 20 and a transport 21. In other words,
A double-sided copy path is composed of a double-sided copy tray 19, a double-sided copy feed roll 20, and a transport 21.

The sorter A has a main body 22 with a plurality of bins 23 spaced apart from each other in the vertical direction, a vertical feed belt 24 extending over the inlet side of each bin 23, and an inlet 25 connected to the vertical feed belt 24 and the delivery roll 26. A gate 27 is provided to connect to either one of the trays 2 and 2, and a tray 2 is provided on the delivery side of the delivery roll 26.
It has a structure with 8.

Next, details of the paper reversing and folding device 18 will be explained with reference to FIGS. 1 and 2.

A large-diameter first roll 31 and a first
A small-diameter second roll 32 in contact with the roll 31 and a third roll 33 in contact with the second roll 32 are provided, and the feed side of the nip portion between the second roll 32 and the third roll 33 is connected to the discharge side of the fixing device 13. A first chute 35 is provided above the delivery side of the nip part A so as to face diagonally upward and to be vertically swingable about a pin 36. A second chute 37 is provided upward so as to face the nip portion between the first roll 31 and the second roll 32, and an elongated U-shape is provided at the extended position of the first and second chute 35, 37. A third chute 38 is provided so as to be inclined upward, and a stopper 39 for paper folding is provided in the middle of the third chute 38 so as to be movable in and out.

40 is a fourth chute provided between the second chute 37 and the nip portion of the discharge roll 41 and presser roll 42;
3, it is connected to either the third chute 38 or the fourth chute 40.

44 is a presser roll pressed against the lower side of the first roll 31, 45 is a second gate provided on the delivery side of the nip section, 46 is a third gate provided continuously with the second gate 45, and 47 is a third gate. 46 is a fifth chute which is continuous with the nip part B, and 48 is a sixth chute provided along the upper part of the fifth chute 47, and is sent out from the nip part B by the second and third gates 45 and 46. The paper feed direction changing means connects the paper to either the paper ejection section or the duplex copying path.

Then, the presser roll 42 and the discharge roll 41
The delivery side of the nipper is connected to a discharge roll 50 provided opposite to the inlet 25 of the sorter A via a guide path 49.

Further, the second gate 45 is moved between a first position close to the peripheral surface of the first roll 31 and a second position distant from the circumferential surface of the first roll 31.
The double-sided copying tray 19 is moved between a first position in contact with the circumferential surface of the double-sided copying tray 19 and a second position separated from the peripheral surface of the double-sided copy tray 19 .
is located.

Next, the operation will be explained.

In the case of normal copying operation (without reversing or folding) As shown in FIG.
The chute 37 is switched to a position continuous with the fourth chute 40. As a result, the paper a discharged from the fixing device 13 is sent to the nip part I,
It is sent out toward the first and second chutes 35 and 37 by the second and third rolls 32 and 33, and is sent to the nip between the discharge roll 41 and the presser roll 42 via the fourth chute 40 by the first gate 43. The paper moves in the direction of the nip section C, is gripped by the nip section C, and is sent out to the discharge roller 50 via the guide path 49.
The discharge roller 50 sends the paper to the inlet 25 of the sorter A and discharges it.

Thereafter, the paper is stored in a predetermined bin 23 by a normal sorter operation, or discharged onto a tray 28 by switching the gate 27.

If you want to flip the paper and copy it again to the other side. (In other words, in the case of double-sided copying operation) As shown in FIG. 45 is located at a position away from the first roll 31, the second gate 46 is located at a position in contact with the first roll 31, and the stopper 39 is located at a position apart from the first roll 31.
The position is separated from the chute 38.

As a result, the paper a sent out from the fixing device 13 is caught in the nip part I, and
The paper is fed into the first and second chute 35, 37 and the third chute 38 by the rolls 32, 33, and when the trailing edge a' leaves the nip part I, it passes along the circumferential surface of the second roll 32 to the nip part lo. The paper is moved by being caught in the paper, is sent out from the nip section by the first and second rolls 31 and 32, and is inverted and discharged onto the double-sided copying tray 19 along the second gate 45.

The paper a discharged onto the double-sided copy tray 19 is conveyed to the paper conveyance path 11 via the double-sided copy feed roll 20 and transport 21 with the copy side facing down, and is then transported to the paper conveyance path 11 with the copy side facing down. It can be copied and double-sided.

In the case of inverting and discharging the paper, as shown in FIG. 5, the first gate 43 and stopper 39 are the same as in FIG. 4, and the second gate 45 is located close to the first roll 31,
The third gate 46 is located apart from the first roll 31, and a continuous passage is formed by the second and third gates 45 and 46.

For this reason, the trailing edge a' of the sheet carried out from the fixing device 13 is caught in the nip part 4 and moved to the first and second rolls 31, as in the case of FIG.
32 and sent out while being reversed at the fifth chute 4 along the second gate 45 and third gate 46.
7, and is then moved along the fifth chute 47 by being caught in the nip between the first roll 31 and the presser roll 44, and is moved along the fifth chute 47 by the first roll 31 and the presser roll 44. The paper is then moved by being caught in the nip between the discharge roll 41 and the presser roll 42.

Thereafter, the sheet is conveyed in an inverted state in the same manner as shown in FIG.

When folding a sheet of paper in half with the crease perpendicular to the transport direction as the boundary.

As shown in FIG. 6, the first gate 43, second gate 45, and third gate 46 are located at the same positions as in FIG. 5, and the stopper 39 is located at a position facing into the third chute 38.

As a result, the paper a sent out from the fixing device 13 is caught in the nip part I and
The paper is sequentially fed into the first and second chute 35, 37 and third chute 38 by the rolls 32 and 33, and the leading edge a'' of the paper hits the stopper 39 while the trailing edge a' of the paper does not leave the nip part A. Since the paper a is in contact with the
is caught in the nip section and moved, and the paper a is sequentially sent out while being folded in half by the first and second rolls 31 and 32, and is passed through the second and third gates 45 and 46 and the fifth chute in the same manner as described above. 4
7, it is bitten into the nip part N and moved, and is sent out to the nip part C while being further reliably folded in two by the first roll 31 and the presser roll 44.
The paper folded in half by the discharge roll 41 and the presser roll 42 is forwarded in the same manner as described above and stored on the bin 23 or the tray 28.

Note that at this time, the first chute 35 is rotated downward about the pin 36 to connect the second chute 37.
The gap between the sheets is narrowed to reduce irregularities in the folding position of the paper.

Further, if the stopper 39 is made movable and adjustable along the third chute 38, the folding position of the paper a can be changed.

In this way, fold paper a in half and place it on sorter A.
Since the sorter A can be stored in the bin 23 or the tray 28, the width H of the sorter A can be reduced.

As described above, according to the illustrated embodiment,
It can perform normal copying operations, double-sided copying operations, operations to reverse and convey paper, and operations to fold sheets in half and convey them.

When the sorter A is not used, as shown in FIG. 7, a tray 51 is provided on the ejection side of the nip portion of the ejection roll 41 and the presser roll 42, and the copied sheets are ejected and stored on the tray 51. Just do it.

The present invention is as described above, and if the gate 43 is set at the first position and the blocking member is set at the second position, the paper a fed from the nip part A is transported along the first chute and ends up at the rear end. When the paper passes through nip part A, it is sent out from nip part B, so if the paper feeding direction changing means is set to the first position, the paper is reversed and moved to the second position.
When the paper feeding direction changing means is set to the second position, the paper is reversed and ejected to the double-sided copying path.

Furthermore, if the gate 43 is set to the first position and the blocking member is set to the first position, the paper fed from nip part A is folded in half and sent out from nip part B, so the paper feeding direction changing means is set to the first position. If the paper is set to the position, the paper is folded in half and discharged through the second paper transport path.

Further, if the gate 43 is set to the second position, the paper a fed from the nip portion A is discharged through the first paper conveyance path in the same posture.

Therefore, it is possible to output the paper in reverse, reverse it and output it to the duplex copy path, fold the paper in half and output it, or output the paper in the same position. Not only can the device be equipped with a paper folding function, which is advantageous in terms of space and cost, it can also fold large sheets of paper in half and send it to the sorter, it can also make double-sided copies, and it is also small. Paper of the same size can be ejected in the same position and sent to the sorter, and there is no possibility of paper jams of small paper.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention.
The figure is an overall schematic explanatory diagram of a copying machine equipped with a sorter, Figure 2 is a detailed explanatory diagram of a paper reversing/folding device, and Figure 3 is a detailed explanatory diagram of a copying machine equipped with a sorter.
4, 5, and 6 are explanatory diagrams of the operation, and FIG. 7 is an explanatory diagram of another embodiment. 31 is a first roll, 32 is a second roll, 33 is a third roll, a and b are nip portions, and a is paper.

Claims (1)

[Claims] 1. The first roll 31 and the third roll 33 are brought into pressure contact with the second roll 32, and a first chute is disposed on the delivery side of the nip portion of the second roll 32 and the third roll 33. In the middle of the shoot,
A blocking member that interferes with the leading edge a'' of the paper to prevent the paper from being transferred is provided so as to be movable between a first position that prevents the paper from being transferred and a second position that allows the paper to be transferred. A first paper conveyance path is provided between the nip portion approach position and the normal paper ejection portion, and a gate 43 is provided at the connection portion between the first paper conveyance path and the first chute. The first roll 31 and the second roll 32 are movably provided between a first position where the paper a is transported toward the blocking member and a second position where the paper a is transported to the first paper transport path. A second paper conveyance path for transporting the paper to the normal paper ejection section and a double-sided copying path are provided on the delivery side of the nip section B, and a second paper conveyance path for transporting the paper to the normal paper ejection section and a double-sided copying path are provided on the delivery side of the nip section B. A paper reversing/folding device comprising: a paper feeding direction changing means that moves between a first position where the paper is transported to the paper transport path and a second position where the paper is transported to the duplex copying path.