JPH04255869A - Automatic recycling document feeder - Google Patents

Abstract

PURPOSE:To prevent jamming from occurring and to recycle a document by providing a hole detecting sensor at a position corresponding to the arranged position of a guiding pawl halfway through a carrying path. CONSTITUTION:Out of the documents 24 on a document platen 23, only the lowermost one is drawn out and fed by paper feeding part 25, turned at a 1st turn roller 36 and carried through the horizontal carrying path 35. In such a case, a punched hole 24a is formed on the document 24 at the position of the guiding pawl 47 and the hole detecting sensor 50 is arranged at the position corresponding to the position of the guiding pawl 47, so that the sensor 50 detects the hole 24a and transmits a hole detection signal S to the solenoid of a switching pawl 40. Then, the solenoid is actuated and the pawl 40 is switched so as to eject the document 24 to a 1st ejecting port 41 side. Therefore, after the document 24 is turned at a 2nd turn roller 37 and exposed on a platen glass 26, the carrying path is switched by the pawl 40 and the document is ejected to the outside through the port 41.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic recycled document feeder, for example, an automatic document feeder such as a copying machine, and more particularly to an automatic document feeder of an original circulation type.

0002

2. Description of the Related Art An example of a conventional recycled document automatic feeder is shown in FIG. 6(a). The automatic recycled document feeder 1 is disposed on the copying machine 2, and has a conveyance path 6 that conveys the document 4 fed from the document table 3 onto the platen glass 5, and a conveyance path 6 that conveys the document 4 after exposure to the outside of the device. It has a switching claw 10 that can be switched between the first discharge port 7 side for discharging the document and the second discharge port 9 side for discharging the document onto the document mounting table 3 through the reversing path 8. The switching operation of the switching pawl 10 is selected by the user at the time of copying using a switching switch (not shown) provided in the operation section of the copying machine 2. Reference numeral 12 denotes a branch path, and the branch path 12 is a path that branches from near the entrance 8a of the reversing path 8 and leads to the second discharge port 9. The document 4 that has been switched back in the reverse path 8 is passed through the second discharge port 9. The document can be discharged onto the document table 3. Near the entrance 8a of the reversing path 8, there are a plurality of transport rollers 13 arranged on the same axis and rotating in a direction to transport the exposed original 4 into the reversing path 8, and a plurality of transport rollers 13 arranged between the transport rollers 13. guide claw 1
4 is provided. As shown in FIG. 6(a), the tip 14a of the guide claw 14 is normally lightly pressed against the guide plate 8b forming the reversing path 8, and the exposed original 4 is pressed against the conveying roller 13 rotating in the direction of arrow C1. At the same time, the document 4 that has been switched back on the reversing path 8 is guided from the reversing path 8 to the branch path 12 in cooperation with the conveying rollers 13 rotating in the direction of arrow C2.

0003

[Problems to be Solved by the Invention] However, in such a conventional recycled document automatic feeder, when copying a document 4 having punched holes 15 (hereinafter simply referred to as holes), the position of the hole 15 is If the position is the same as that of the guide claw 14, when the exposed original 4 is conveyed into the reversing path 8, the hole 15 of the original 4 will be aligned with the guide claw 1, as shown in FIG. 6(b).
There is a problem that the document 4 may get caught on the leading edge 14a of the document 4, resulting in a so-called jam or defects in the document 4.

0004

OBJECTS OF THE INVENTION The present invention has been made against the background of the problems of the prior art, and in claim 1, a hole detection sensor is provided in the middle of the conveyance path at a position corresponding to the position of the array of guide claws. By providing a hole at a position that does not overlap with the position of the guide pawl, the document with a hole at the position that overlaps with the position of the guide pawl is ejected to the ejection port on the upstream side of the guide pawl, eliminating the occurrence of jams and defective documents. It is an object of the present invention to provide an automatic recycling document feeder that can recycle certain documents through a normal ejection port, and a hole detection sensor for detecting holes in the entire width of the document is provided in the middle of the conveyance path. By providing this, it is an object of the present invention to provide an automatic recycling document feeder that discharges all documents with holes to the discharge port upstream of the guide claw and eliminates the occurrence of jams and defective documents.

[0005]

[Structure of the Invention] In order to achieve the above object, the present invention is based on claim 1.
In this case, there is a transport path that transports the fed original onto the platen glass, a first ejection port that ejects the exposed original to the outside of the device, and a second ejection port that ejects the original onto the document mounting table through a reversing path. a switching claw that can be switched to the opposite side; and a switching claw that is provided near the entrance of the reversing path to transport the original into the reversing path and branching the original switched back in the reversing path from the reversing path to the second discharge port. In an automatic recycling document feeder having a plurality of conveyance rollers and a plurality of guide pawls that guide the document to a leading branch path, the recycle document automatic feeder is arranged at a position corresponding to the guide pawl in a direction perpendicular to the conveyance direction of the document in the middle of the conveyance path. A hole detection sensor is provided for detecting holes in the document and transmitting a hole detection signal, and based on the hole detection signal, the switching pawl is switched so that the document is discharged through a first discharge port. There is.

According to a second aspect of the present invention, in the automatic recycling document feeder according to the first aspect, the hole detection sensor is provided in the middle of the conveyance path and arranged in a direction perpendicular to the conveyance direction of the document. It is characterized by detecting holes in the hole and transmitting a hole detection signal.

[0007]

[Function] According to claim 1 of the present invention, the switching claw is switched in response to a hole detection signal transmitted by a hole detection sensor that is placed at a position corresponding to the position of the guide claw in the middle of the conveyance path and detects a hole in the document. Since the original is ejected to the first ejection port, the original transported to the reversing path by the transport roller and the guide claw does not have a hole at the same position as the guide claw, and does not engage with the guide claw. The document is smoothly conveyed into the reversing path, and no jamming or defective documents occur.

Further, in claim 2, the switching claw is switched in response to a hole detection signal from a hole detection sensor that is disposed in the middle of the conveyance path in a direction perpendicular to the conveyance direction of the document and detects holes throughout the width of the document. Since the document is discharged to the first discharge port, the document conveyed to the reversing path does not have a hole. Therefore, the document is smoothly conveyed to the reversing path without engaging the guide pawl, and there is no occurrence of jamming or defects in the document.

[0009]

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. 1 to 4 are diagrams showing an embodiment of an automatic recycled document feeder according to claim 1 of the present invention, and show a case where the automatic recycled document feeder is disposed on a copying machine. First, the configuration will be explained. In FIG. 1, 21
is an automatic recycled document feeder, which is arranged on the main body of the copying machine 22. Recycled original automatic feeder 2
Reference numeral 1 denotes a paper feeding unit 25 that pulls out and feeds the originals 24 on the original platen 23 one by one starting from the lowest original 24, and a transport unit that transports the fed originals 24 onto the platen glass 26 at the top of the copying machine 22. 27, and an inversion section 28 that inverts the exposed original 24 on the platen glass 26 and discharges it onto the original table 23 again.

The document 2 on the document table 23 is placed in the paper feed section 25.
A blower tank 31 that blows out air that lifts the document 24, and a vacuum tank 33 that generates a suction force that attracts the lowermost sheet of the lifted document 24 onto the paper feed belt 32 are provided. 35 is a horizontal conveyance path which is a conveyance path;
The horizontal conveyance path 35 consists of two sets of conveyance rollers and a guide plate, and is provided from a first turn roller 36 on the paper feed section 25 side to a second turn roller 37 on the entrance side onto the platen glass 26, The original 24 fed from 25 is conveyed to a second turn roller 37. On the platen glass 26 is an annular conveyor belt 3 stretched between a driving roller and a driven roller.
8 is provided, and the document 24 conveyed to the second turn roller 37 is conveyed to a predetermined position on the platen glass 26, exposed, and conveyed to the reversing section 28.

Reference numeral 40 denotes a switching claw, and the switching claw 40 is provided near the downstream end of the document 24 on the platen glass 26 in the conveyance direction, and as shown in FIG. It is possible to switch between a first discharge port 41 for discharging the document and a second discharge port 43 for discharging the document onto the document mounting table 23 through the reversing path 42 of the reversing section 28 . Switching of the switching claw 40 is performed by a bracket connected to a solenoid (not shown), and the solenoid is activated based on a hole detection signal S from a hole detection sensor 50, which will be described later, to eject the document 24 through the first ejection port 41. It can be done.

A reversing drive roller 44 capable of forward and reverse rotation is provided in the middle of the reversing path 42 of the reversing section 28.
A branch path 45 is provided that branches from near the inlet 42a on the side of the second platen glass 26 and leads to the second outlet 43. Near the entrance 42a of the reversing path 42, there is a
A plurality of conveying rollers 46 and a plurality of guide claws 47 shown in FIG. 3(b) and FIG. 3(a) are provided.

The conveying rollers 46 are provided on the same axis at intervals so as to protrude from the guide plate of the reversing path 42 into the reversing path 42, and between the conveying rollers 46, guide claws 47 are arranged to hold the exposed original. The tip 47a of the guide claw 47 faces downstream in the conveyance direction, and is configured to lightly press the guide plate against the tip 47a. The exposed original 24 is conveyed to the reversing path 42 in the direction of arrow D. In addition, the reversing drive roller 4 in the reversing path 42
The backward original document 24A that has been switched back due to the reverse rotation of step 4 is guided in the direction of arrow G. 4
Reference numeral 9 denotes a pull-out roller, which pulls out the backward document 24 in the direction of arrow G.
A is pulled out and conveyed to the branch route 45.

Reference numeral 50 shown in FIG. 1 is a hole detection sensor, and the hole detection sensor 50 is supported by a bracket 51, which is located approximately at the center of the first turn roller 36 and the second turn roller 37 in the middle of the horizontal conveyance path 35. is fixed to the guide plate. As shown in FIG. 3(b), the hole detection sensor 50 is
It is arranged at a position corresponding to the guide pawl 47 in a direction perpendicular to the conveying direction of the original 24, and detects holes such as punch holes in the original 24 optically, for example, and sends a hole detection signal S to the solenoid of the switching pawl 40. do.

When copying an original 24 that does not have a hole 24a at the position corresponding to the guide claw 47, when the reverse copy mode switch on the operation panel of the copying machine 22 is turned on, the image will be displayed as shown by the thick solid line in FIG. 4(a). Then, the documents 24 on the document table 23 are pulled out one by one at the bottom and fed to the first turn roller 36.
is conveyed to the horizontal conveyance path 35. The original 24 is the guide claw 4
Since there is no punch hole 24a at the corresponding position of 7, the hole detection sensor 50 does not transmit the hole detection signal S, and the switching pawl 40 does not operate. The original 24 passes through the second turn roller 37 and is exposed on the platen glass 26, and then passes through the reversing path 42 and is transferred to the second turn roller 37.
The document is discharged from the discharge port 43 above the document 24 on the document table 23 . This is repeated for the number of sheets specified on the operation panel.

Further, a punch hole 2 is provided at a position corresponding to the guide claw 47.
When copying a document 24 that does not have a document 4a, when the switchback copy mode switch on the operation panel is turned on, the document 24 is transported to the reversing path 42 in the same way as described above, as shown by the thick solid line in FIG. 4(b). The original 24 is switched back by the reversal of the reversing drive roller 44, moves backward along the reversing path 42, passes through the branch path 45, and is ejected onto the original 24 from the second ejection port 43. This process is repeated until the number of sheets specified on the operation panel is reached.

Next, the operation will be explained. When copying a document 24 having a punch hole 24a at a position corresponding to the guide claw 47, when the reverse copy mode or switchback copy mode switch on the operation panel of the copying machine 22 is turned on, the document 24 will be copied as shown in FIG. It is transported as shown by the thick solid line in c). The details will be explained below.

In the present invention, the original 24 on the original placing table 23 is
The bottom sheet is pulled out and fed from the paper feed section 25, turned by the first turn roller 36, and conveyed along the horizontal conveyance path 35. Since the document 24 has a punched hole 24a at the position of the guide claw 47, the hole detection sensor 50 is arranged at a position corresponding to the position of the guide claw 47, so the hole detection sensor 50 detects the punched hole 24a. A hole detection signal S is sent to the solenoid of the switching pawl 40. The solenoid is activated, and the switching pawl 40 moves the document 24 to the first ejection port 41 as shown in FIG. 2(a).
As a result, the document 24 is switched to the second turn roller 37 as shown by the thick solid line in FIG.
After being exposed on the platen glass 26, the conveyance route is switched by the switching claw 40, and the sheet is discharged out of the apparatus through the first discharge port 41. Therefore, it is possible to prevent the original 24 from jamming or engaging the guide claw 47, thereby preventing the original 24 from being defective.

Next, an embodiment of claim 2 of the present invention will be explained. FIG. 4 is a diagram showing a hole detection sensor 55 of an embodiment of the recycled document automatic feeder 54 according to the second aspect, and the other features are the same as those in the first aspect. In the recycled document automatic feeder 54 according to the second aspect of the invention, in FIG.
A hole detection sensor 55 is provided in place of the hole detection sensor 50 in the middle of the horizontal conveyance path 35. The hole detection sensor 55 is disposed in a direction perpendicular to the direction of conveyance of the document 24 and is fixed to the guide plate of the horizontal conveyance path 35 by a bracket 56, and is capable of detecting holes in the entire width of the document 24.

Therefore, the hole detection sensor 55 detects all holes in the document 24 being conveyed during copying, no matter where the holes are located, and sends a hole detection signal S to the solenoid of the switching pawl 40. The solenoid is activated by the signal S, and the switching pawl 40 is switched as shown in FIG. 2(a). For this reason, the perforated original 24 is exposed on the platen glass 26 and then discharged out of the apparatus from the first discharge port 41, as shown by the thick solid line in FIG. 4(c). Therefore, manuscript 2
It is possible to prevent jams or defects in the original document 24 due to the holes 4 engaging with the guide claws 47, and the productivity of copying is greatly improved.

[0021]

[Effects of the Invention] As explained above, according to the present invention,
In claim 1, by providing a hole detection sensor on the conveyance path at a position corresponding to the position of the guide pawl array, documents having holes at positions overlapping with the guide pawl positions are transferred to the discharge port located upstream of the guide pawl. This eliminates the occurrence of jams and document defects, and allows documents with holes at positions that do not overlap with the guide claws to be recycled through a normal outlet, greatly improving copying productivity.

Further, in claim 2, by providing a hole detection sensor on the conveyance path to detect holes throughout the width of the document,
All documents with holes are ejected to the outlet on the upstream side of the guide claw, thereby eliminating the occurrence of jams and defective documents.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic front view of an automatic recycled document feeder according to claim 1 of the present invention.

FIG. 2 is a diagram showing the main parts of the conveyance roller, guide pawl, and switching pawl in FIG. It is.

3 is a diagram showing main parts in FIG. 1, in which (a) is a perspective view showing the vicinity of a conveying roller and a guide claw, and (b) is a top view showing the positional relationship between the guide claw and a hole detection sensor.

FIG. 4 is a diagram showing the document transport path in each mode during document copying in FIG. 1, where (a) shows the second
An explanatory diagram showing the path when the original is ejected to the ejection port, (b) is the path when the document is ejected to the second ejection port in switchback copy mode, and (c) is the path when the document is ejected to the first ejection port in both modes. It is.

FIG. 5 is a top view of a hole detection sensor of the automatic recycled document feeder according to claim 2 of the present invention.

FIG. 6 is a diagram showing a conventional recycled document automatic feeder, in which (a) is an overall front explanatory view, and (b) is an enlarged explanatory view of the main part.

[Explanation of symbols]

21, 54 Recycled original automatic feeder 23
Original mounting table 24 Original 26 Platen glass 35 Horizontal conveyance path (conveyance path) 41 First discharge port 42 Reversal path 43 Second discharge port 45 Branch path 46 Conveyance roller 47 Guide claws 50, 55 Hole detection sensor S Hole detection signal

Claims (2)

[Claims] Claim 1: A conveyance path for conveying the fed original onto a platen glass, a first ejection port side for ejecting the exposed original to the outside of the apparatus, and a first ejection port for ejecting the exposed original onto the document mounting table through a reversing path. a switching claw that can be switched to the second ejection port side; and a switching claw that is provided near the entrance of the reversing path and transports the original into the reversing path and branches the original that has been switched back in the reversing path from the second reversing path. In an automatic recycling document feeder having a plurality of conveyance rollers and a plurality of guide pawls that guide the document to a branch path leading to a discharge port, the document feeder includes a plurality of conveyance rollers and a plurality of guide pawls that correspond to the guide pawls in the middle of the conveyance path in a direction perpendicular to the conveyance direction of the document. A hole detection sensor is provided which is placed at a position to detect holes in the document and transmits a hole detection signal, and based on the hole detection signal,
An automatic recycling document feeder characterized in that the switching claw is switched so that the document passes through a first discharge port and is discharged. 2. The hole detection sensor is provided in the middle of the conveyance path, arranged in a direction perpendicular to the conveyance direction of the document, detects holes across the entire width of the document, and transmits a hole detection signal. The recycled original automatic feeder according to claim 1.