JP2851910B2 - Document feeder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document feeder attached to an image recording apparatus such as a copying machine, and more particularly, to a document feeder having a document surface reversing mechanism.

[Conventional technology]

2. Description of the Related Art Conventionally, in an automatic document feeder (hereinafter, also simply referred to as an ADF) attached to an image recording apparatus such as a copying machine, a plurality of documents are automatically placed one by one at a predetermined document placement position (for example, on a contact glass). ), And
There is a recycled ADF in which the fed documents are stacked on a re-feedable tray so that a similar feeding operation can be performed again.

As a conventional document feeder of this type, for example, the one shown in FIG. 6 is known. This device has two
The two document supply tables 1 and 2 arranged in layers, guide members 4 and 5 connecting the exit sides of the document supply tables 1 and 2 and the entry side of the document apparatus table 3, and the documents on the document table 3 are indicated by arrows. A transport belt that transports in the B direction, and a switch that switches the traveling direction of a document that is disposed near the middle of the guide member 4 and that is sent from the document table 3 along the guide 4 to one of the document supply tables 1 and 2 A document supply table 1, 2
When one becomes a supply tray, the switching member 7 is moved so that the other is used as a discharge tray.

[Problems to be solved by the invention]

However, in such a conventional document feeder, a means only for re-feeding is provided on each of the document feeders 1 and 2.
2, the apparatus is large and expensive, and it is difficult to remove the original from the lower tray 2. Therefore, if a jam or the like occurs on the copying machine side, the original is removed. There is a problem that the re-feeding operation cannot be easily performed.

[Object of the invention]

Therefore, according to the present invention, by providing a document conveying means having a reversing function between the first and second trays, the re-feeding operation can be easily performed at the time of failure of the recording apparatus in a small size and at low cost. It is an object of the present invention to provide a high-performance document feeder capable of performing the above-described operations.

[Means for solving the problem]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a document apparatus of a writing apparatus in which a first tray on which a plurality of document sheets can be stacked and a document sheet stacked on the first tray are conveyed one by one in a predetermined direction. A feeding means for feeding the sheet on the table, a second tray disposed above the first tray, and a discharge direction switching member capable of swinging up and down at the entrance side of the second tray; A selective discharging means for selectively discharging a document sheet on a document mounting table of a recording apparatus at a downstream side in a feeding direction to one of a first tray and a second tray; A reversing mechanism that conveys the original sheet to the tray and reverses the front and back of the original sheet during the conveyance, and when the original sheet is a double-sided original, swings the discharge direction switching member downward to move the original sheet to the second tray. Discharge and turn over by the reversing mechanism A recording sheet that is placed on one tray, or if the recording operation fails on the recording device side, the discharge direction switching member is swung downward to remove the original sheet that failed in the recording operation. It is characterized in that it is discharged to a second tray.

 Hereinafter, the present invention will be described based on examples.

 1 to 5 are views showing one embodiment of the present invention.

 First, the configuration will be described.

1 and 2, reference numeral 11 denotes a copying machine, reference numeral 12 denotes a document feeder attached to the copy machine 11, and the document feeder 12
The first tray 21 and a plurality of original sheets S stacked on the first tray 21 are conveyed one by one in a predetermined direction (the directions of arrows f ₁ and f ₂ ), and are transferred to the copier body 11 (image recording apparatus). Feeding means 22 for feeding onto a contact glass 13 (document mounting table);
The second tray 23 disposed above the tray 21 and the original sheet S on the contact glass 13 on the downstream side in the feeding direction of the feeding unit 22 are placed on one of the first and second trays 21 and 23. A selective discharging unit 24 for selectively discharging the original sheet S, and a reversing mechanism for transporting the original sheet S discharged on the second tray 23 to the first tray 21 and inverting the front and back of the original sheet S during the transport.
25 and the frame of the document feeder 12 above the second tray 23
14 is provided with a guide plate 26 supported so as to be vertically swingable.

The first tray 21 is arranged above the contact glass 123 of the copying machine 11 with a slight inclination, and sets and stacks a plurality of document sheets S from above.

The feeding means 22 includes a passage forming member 30 extending from the exit of the first tray 21 to the entrance of the contact glass 13, and abuts on the lower surface of the original sheet S near the exit of the first tray 21. call roller 31 to draw the S in the arrow f ₁ direction
And a blocking roller 32 having a predetermined rotational resistance disposed in front of the call roller 31 and separating the lowermost document sheet S by contacting the lower surface of the document sheet S which is prevented from proceeding by the blocking roller 32. The separation roller 33 and the separated original sheet S
The pulling rollers 34 and 35 and the passage forming member 30
Document reversing rollers 36, 37, 38 for reversing the conveying direction of the document sheet S along the axis and a rotating claw 39 capable of opening and closing a part of the passage in the passage forming member 30, conveying rollers 41, 42 and both rollers 41 , 42 and a transport unit 44 for transporting the original sheet S on the contact glass 13 by a transport belt 43 wound around the transport belt 43.

The selective discharging unit 24 is connected to the transport unit 44 which is a part of the feeding unit 22 and the second tray from the outlet of the contact glass 13.
A passage forming member 51 extending to the entrance of the passage 23;
A plurality of transport roller pairs 52, 53, 54 attached to 51,
A discharge direction switching member 55 as a guide member supported vertically at the entrance side of the second tray 23 so as to be swingable; and a driving unit 56 for vertically swinging the discharge direction switching member 55. 56 is the frame of the document feeder 12
A tension spring 57 that is stretched between 14 and the discharge direction switching member 55 and constantly pulls up the discharge direction switching member 55, a shaft member 58 integrally attached to the discharge direction switching member 55,
A solenoid 60 is drivingly connected to the shaft member 58 via the link member 59, and swings the discharge direction switching member 55 downward against the tension of the tension spring 57. When the original sheet S is a double-sided original (in the double-sided mode) or when the recording operation has failed on the copying machine 11 side,
When a jam or the like occurs, the original sheet S is discharged to the second tray 23 by swinging the discharge direction switching member 55 downward to a substantially horizontal position by suction of the solenoid 60, and in a normal recycle mode. The discharge direction switching member 55 is returned upward by the tension spring 57, and the original sheet S is discharged to the first tray 21.

The reversing mechanism 25 includes a reversing roller 61 provided near the outlet of the second tray 23, a passage forming member 63 that forms a reversing passage 62 between the reversing roller 61, and a reversing roller attached to the passage forming member 63. The original sheet S is transported to the first tray 21 together with driven rollers 64 and 65, and the original sheet S is transported by the reversing roller 61 and the driven rollers 64 and 65 to the second tray 23.
To the first tray 21, and the upper and lower surfaces (front and back) of the original sheet S are reversed in the reversing path 62 during the transport.

The guide plate 26 abuts on the discharge direction switching member 55 or swings upward by manual operation, and
It is possible to pivot largely in the clockwise direction in FIG. 1 to completely release the upper part. A notch 55a is formed at the center of the swinging end of the discharge direction switching member 55 so as to make the work of taking out the document sheet S from the first tray 21 easier.

In FIG. 1, reference numeral 71 denotes a switching claw provided near the exit of the contact glass 13 for switching the discharge direction of the original sheet S to the discharge tray side passage of the copying machine 11 when recycling is unnecessary. This is an insertion port when the document sheet S is manually fed onto the contact glass 13.
The solenoid 60 is connected to a controller (not shown). The controller 60 receives a command signal from a control circuit of the copying machine 11, a sheet detection sensor 73 for detecting the original sheet S in the passage forming member 51, and a reversing passage 62. The driving means such as each roller and claw member is operated based on a sensor such as a paper detection sensor 74 for detecting the original sheet S.

 Next, the operation will be described.

First, in the case of the recycle ADF mode, as shown in FIG. 3, original sheets S are stacked on a page in order and set on the first tray 21 and fed one by one onto the contact glass 13 by the feeding means 22. Here, the document surface is scanned and illuminated by the scanning illumination means in the copying machine 11. Then, a known exposure process is performed using the document reflected light including the image information. Next, the original sheet S is sent downstream by the transport unit 44, and the transport roller pairs 52, 53,
Conveyed by 54. At this time, since the discharge direction switching member 55 swings upward due to the tension of the tension spring 57, the document sheets S are stacked on the first tray 21 again in the order in which they were initially placed. Therefore, the normal re-feeding operation is performed very smoothly.

Next, when the original sheet S is in the duplex mode in which the original sheet S is a duplex document, as shown in FIG. When the sheet detection sensor 73 detects the leading end of the document sheet S in the passage forming member 51, the solenoid 60 is sucked, and the discharge direction switching member is
55 swings downward. Therefore, contact glass 13
The original sheet S discharged onto the second tray 23 is turned upside down by the reversing mechanism 25, is stacked upside down from the first set state on the first tray 21, and waits for copying on the back side. . After copying the back surface, the original sheet S is stacked on the first tray 21 again (there is no need to perform inversion by the reflection mechanism 25), or the switching claw 71 rotates upward, and the original sheet S Is discharged to the original discharge tray side.

On the other hand, when a recording operation fails due to a jam or the like occurring on the copying machine 11 side, the solenoid 60 is sucked by the controller receiving a command from the copying machine 11, and the discharge direction switching member 55 moves downward to a substantially horizontal position. The original sheet S whose copying (recording operation) has failed by swinging is discharged to the upper second tray 23 as shown in FIG. Therefore, the guide plate 26 is pivoted upward to completely open the second tray 23 and the original sheet S can be easily taken out. it can.

As described above, in the present embodiment, since the reversing mechanism 25 provided on the downstream side of the second tray 23 is connected to the first tray 21 as a document conveying means having a reversing function, the second tray 23 is In addition, a simple, low-cost, high-performance document feeder can be provided which also serves as a guide member for the reversing mechanism 25. Further, since the discharge direction switching member 55 of the selective discharge means 24 is supported by the second tray 23 so as to be vertically swingable, the transport path of the document sheet S can be simplified, and the size can be further reduced. Further, when the recording operation on the copying machine 11 side fails, the second tray 23 is opened and the original sheet S can be taken out very easily, and the re-feeding operation can be greatly facilitated. In addition, since the notch 55a is formed in the discharge direction switching member 55, the document sheet S on the first tray 21 can be easily taken out.

In the present embodiment, the original sheet S
The size of the first tray 21
And the second tray 23 can be properly used and stacked for each size.

〔effect〕

According to the present invention, after the ejection direction switching member of the selective ejection unit is swung upward to feed the original sheet placed on the first tray onto the original placement table of the recording apparatus, the document is again re-established.
The original sheet can be discharged to the first tray and easily re-fed.

When the original sheet placed on the first tray is a double-sided original sheet, the ejection direction switching member is swung downward to eject the original sheet to the second tray, and the original sheet is inverted by the reversing mechanism. The paper can be discharged to the first tray with its front and back reversed. Therefore, for example, double-sided originals can be copied, and a high-performance original conveying device can be provided.

Further, since the discharge direction switching member of the selective discharge means is supported by the second tray so as to be vertically swingable, the conveyance path of the document sheet can be simplified, and the size can be further reduced.

Further, since the original sheet is ejected to the first tray when the recording operation of the recording apparatus fails, the upper part of the second tray can be opened to take out the original sheet very easily. Can be greatly simplified.

[Brief description of the drawings]

1 to 5 are diagrams showing an embodiment of a document feeder according to the present invention. FIG. 1 is an overall configuration diagram, FIG. 2 is a plan view of a main part thereof, and FIGS. Action Explanation Diagram, Sixth
FIG. 1 is a sectional view showing a conventional document feeder. 11: Copy machine (recording device), 12: Document transport device, 13: Contact glass (document mounting table), 21: First tray, 22: Feeding means, 23: Second tray, 24 ... Selective discharge means, 25... Reversal mechanism, 55... Discharge direction switching member, S.

Claims (2)

(57) [Claims] A first tray on which a plurality of original sheets can be stacked; and a feeder for feeding the original sheets stacked on the first tray one by one in a predetermined direction and feeding the original sheets onto a document apparatus base of a recording apparatus. A feeding means, a second tray disposed above the first tray, and a discharge direction switching member capable of swinging up and down at an entrance side of the second tray, and recording at a downstream side in a feeding direction of the feeding means. A selective discharge means for selectively discharging a document sheet on a document mounting table of the apparatus to one of a first tray and a second tray, and conveying and transporting the document sheet discharged on the second tray to the first tray; A reversing mechanism for reversing the front and back sides of the original sheet during transport, and when the original sheet is a two-sided original, swinging the discharge direction switching member downward to discharge the original sheet to the second tray, Turn the original sheet upside down Document feeder is characterized in that so as to place the b. 2. The apparatus according to claim 1, wherein when the recording operation fails on said recording apparatus side, said discharge direction switching member is swung downward to discharge the original sheet on which the recording operation has failed to a second tray. The document transport device according to claim 1, wherein