JPS6279437A - Original feeding device - Google Patents

Abstract

PURPOSE:To facilitate copying operation by detecting the size of a sheet original placed on a conveyance table and sorting originals which vary in size on the basis of the detection. CONSTITUTION:When the sheet original is set on a platen 1B10, feed-out rollers 1B12 separate from each other and a lock piece 1B13 enters a feed path; and the lock piece 1B13 collides against the front end of the sheet original in this state and the size of the sheet original is detected by a detection part 1B11. Then, the feed-out rollers 1B12 abut on each other after the size direction and begins to rotate in original feeding-out directions and the lock piece 1B13 leaves the feed path, so that the sheet original is fed from the platen 1B10.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a document feeding device used in a copying machine or the like.

(Prior Art) It is known that copying apparatuses include a document feeding device that automatically feeds a sheet-like document toward an exposure scanning section.

This document feeding device positions a slidable guide plate provided on the feeding table according to the width of the document to be fed, and places the document along this guide plate. By doing so, the feeding set is performed, and upon receiving a feeding start signal from the copying device, the original is fed toward the document mounting table of the exposure scanning section, and when the exposure scanning on the document mounting table is completed, the original is The document is fed from the document placement table toward the output section.

In such a document feeding device, a guide plate is positioned on a feeding table of the document feeding device, and after the document is placed on this table, it is unnecessary for an operator to take out the document. Although this makes the copying operation smoother, there is still the inconvenience of having to determine the width of the document to be copied on the feeding table, especially when copying documents with many different widths. had the disadvantage that it required many operations to move the guide plate.

(Objective) The present invention has been made in view of the above, and an object thereof is to provide a document feeding device that eliminates the above-mentioned drawbacks.

(Configuration) The present invention detects the size of the original placed on the feeding table, sorts the original before exposure scanning according to the size of the original, and scans the sorted original. This is characterized by the fact that it is re-fed to the department.

(Example) The present invention will be explained below with reference to illustrated embodiments.

FIG. 1 shows a part of a copying machine equipped with the document feeding device of the present invention.

In FIG. 1, a document feeding device 1 is provided at a position adjacent to an exposure scanning document table 2A of a main body 2 of a copying apparatus.

For convenience, the document feeding device 1 is divided into a semi-automatic feeding section IA and a fully automatic feeding section IB.

The above-mentioned semi-automatic feeding section IA is a section used when feeding a plurality of sheet-like originals of the same width at once, or when feeding a sheet-like original with a negative leaf.

It is located on the feeding side of the feeding table IAI, which can be opened and closed, on which a sheet-like original is placed and set, and the feeding table IAI.

A feeding belt IA3 that feeds out the sheet document located at the lowest position in the sheet layer in cooperation with the guide mylar IA2 that abuts the upper surface, and a flexible separation belt located behind the feeding belt IA3 in the feeding direction of the sheet document. A separation roller that cooperates with the blade IA4 to stop the leading edge of the sheet IM document fed out from the feeding table IAI, and sends out only the lowest one of the sheet documents in response to a feeding command signal from the main body of the copying machine. IA5 and this separation roller
The sheet original sent out by the A5 is placed on the original placing table 2A.
It is equipped with a pull-out roller IA6 that pinches and conveys the paper toward the user.

The sheet original sent from the pull-out roller IA6 onto the M document mounting table 2A is conveyed to the exposure position by the conveyor belt 2A1 in contact with the surface of the document A placing table, and then stopped.
After being scanned by the exposure optical system 2B in the copying apparatus main body 2, the original is reactivated by the conveyor belt 2A1! a It is ejected from the mounting table A.

Inside the copying apparatus main body 2 is a well-known image processing section including the above-mentioned exposure optical system 2B, that is, a photosensitive drum 2C.

A developing section 2D, a transfer section 2E, a cleaning section 2F, etc. are built in, and each of these sections, for example, the transfer section 2E, is provided with a paper feed section 2G for feeding a transfer sheet.

On the other hand, the fully automatic feeding unit IB in the document feeding device 1 is a part used to feed sheet originals of various sizes from the same table. and a set table IB2. which is set to a plurality of different sizes and which accommodates sheet originals of a single size. IB3, a sheet document feeder 1134 provided on the sheet document feeding side of each of these set tables, and a sheet document feeder that feeds out the sheet document introduced into the set table by the sheet document feeder IB4 from within the table. Main feeding path IB that connects IB5, feeding table LDI, and each set table
6 is provided.

The details of each part will be explained below.

In FIG. 2, the feeding table IB1 is connected to the mounting table IBI.
O, a document size detection section IBII, and a detection section IBII.
B11 is composed of a plurality of optical sensors that detect the width (meaning the length in the direction orthogonal to the drawing in FIG. 2) and length of the document on the mounting table IB10.

The position of the optical sensor mentioned above is as shown in FIG.
For example, when the sheet originals set on the mounting table 1810 are A-column 3-size and 4-size, the width from the reference edge can be determined so that the respective horizontal or vertical orientation can be determined. Width direction sensors 5l111 to 5115 that detect
Longitudinal sensors SLI to SL4 are respectively arranged to detect the length when the tip is blocked by a locking piece to be described later.

Among each sensor, sensor Sυ2゜SV5 in the width direction
and SL4 in the length direction are for detecting a size that does not correspond to the size of the set fill, which will be described later.When detected by these sensors, a control unit (not shown) is used to determine whether or not feeding is possible. Display is performed.

Note that in FIG. 3, the reference numeral Sj is a sensor for job sheet detection that is used to distinguish the feeding of one sheet document group from other sheet document groups.

In FIG. 2, in front of the mounting table lB10, that is, on the document feeding side, there is a sheet document sandwiched between the placing table lB10.
A feed-out roller IB12 that can be moved toward and away from the feed-out roller IB12 and a locking piece IB13 that is located in front of the feed-out roller IB12 and that can move forward and backward in the sheet document feeding path are provided.

When setting a sheet original on the mounting table lB10,
As the feeding rollers 1812 are separated from each other, the locking piece IB13 enters the feeding path, and in this state, the leading edge of the sheet original is blocked by the locking piece LBL3, and the size of the sheet original is detected by the detection unit IBII. .

The above-mentioned Sea 1 to W1. After the document size detection is completed, the feeding rollers l1112 come into contact with each other and begin to rotate in the direction of feeding out the sheet original, and the locking piece lB13 retreats from the feeding path, so that the sheet original is
Table I B 10 Color feeding h le.

Note that a set sensor SO that detects that a sheet original is set on the mounting table IB10 is arranged between the feeding roller IB12 and the mounting table IB10.

Based on the detection by this sensor So, each sensor of the size detection section 1 and 1 is activated.

In FIG. 2, below the feeding table tsio, there is a set table IB2. IB
3 is arranged in two rows below.

These set tables IB2 and 103 are set in an inclined position so that a sheet original introduced from an introduction path (to be described later) can easily move toward the feeding side due to its own weight. The size of the lower set table 1B3 is set so that it can accommodate large-sized sheet documents, respectively. The size can be changed depending on the size of the sheet document being printed.

And this set table IB2. On the document feeding side of IB3, there is a sheet document loading device with the same structure for each table [IB4 and sheet document loading device! IB5 are arranged above and below, respectively.

Sheet loading device i! ! The IB4s are disposed in the middle of an introduction path IB4O branching from the main transport path of the sheet 1 document, which will be described later, and at the ends of the introduction path IB4O above each of the set tables IB2 and IB3, and are in contact with each other. A pair of carry-in rollers IB41 that carries the sheet document sandwiched between them toward the setting table.
It is made up of.

Note that the carry-in roller 1841 is supported by a swinging arm (not shown) having the roller IB41 on the side of the introduction path IB4O as a fulcrum, and is opened when removing a jam or the like.

On the other hand, the sheet document transport device IB5 includes a guide mylar IB50. Feeding belt IB51, separation blade IB52. Separation roller 1853. pull out roller l
It is composed of B54.

In front of the pull-out roller IB54, a discharge path IB55 communicating with the main feeding path is provided.

As mentioned above. Inlet path 1B4O branches, and output path 1B
The main feeding path IB6 with which 55 communicates is connected to the feeding table l.
This route serves both as a route for feeding the sheet originals fed out from the feeding roller lB12 on the B10 side to each set table, and a route for feeding the sheet originals carried out from each set table toward the document mounting table 2A of the copying apparatus main body 2. Above the upper set table IB2, the feeding path IB7 branches into a feeding table 1810 side and a feeding path IB7 on the document placement table 2A side.

A pair of feeding rollers IB60 capable of forward and reverse rotation and capable of nipping and conveying a sheet document are respectively disposed near each branch position in the main feeding path IB6.

Among the branching positions in the main transport path IB6, the branching part between the feeding table 1810 side and the document mounting table 2A side located above the set table IB2 for storing small-sized sheet originals, and each set table IB2° Swingable first to third switching claws IB61 to 1063 for switching and setting the feeding direction of the sheet document are arranged at the branching part with the introduction path 1B4O toward 1B3.

The switching claws In61 to In61 to 1863 are connected to a support shaft IB611. whose base end is supported. In621. It is oscillatedly driven by a solenoid SQL via an operating rod IB64 whose base end is supported by IB63L.

The solenoid SQL is configured to set the position at each branch in the main ship feed path IB6 by a control unit (not shown), and this control unit controls the position of the sheet yK on the feeding table IBIO by the sensor So. After confirming the existence of the document, the switching claw IB61 operates and controls the solenoid so as to swing in the direction in which the sheet document can be fed toward the setting table, and the sensor group on the feeding table IB10 controls the operation of the sheet document. Switching claw LB62.1863 according to size
one of them operates and controls the solenoid so that it swings in a direction that allows the sheet document to be introduced toward the introduction path lB4O of the set table according to the sheet document size, while receiving a feed start command from the copying apparatus main body 2. Set table I
The operation of the solenoid is controlled so as to selectively swing the switching claw IB62.1B63 in the direction in which the sheet document can be fed from either of the delivery paths lB55 of B2゜In2, and the switching claw IB61 is moved from the setting table. The solenoid SQL is actuated and controlled to swing the original sheet in a direction in which it can be fed toward the original fiU table 2A.

The above-mentioned control unit is configured to store the order of the sheet originals fed from the feed table IBIO to the cellar 1, and also to store the sizes of the sheet originals in this order. When the sheet originals are edged toward the original table 2A, the original transport devices IB5 included in each set table are selectively driven in accordance with the order in which they are fed out from the feeding table IB10.

As described above, this document transport device 185 is used to transport the sheet documents whose size is detected on the feed table IBIO and which are accommodated in the set table in accordance with the order of feed from the feed table IBIO. Instead of sending table IB10, each set table IB2,
In the case where sheet originals are placed directly on 1B3 after being classified by size.

For example, a set table IB2. I
When the original sheet is set on a B3, an operation section (not shown) of the main body 2 of the copying machine is installed in order to satisfy the need to store the sheet document by size after exposure scanning.
By operating the original selection switch provided in the printer, a sheet original of the size corresponding to the type of switch can be ejected from one of the set tables after setting the page order arbitrarily. ing.

The above-mentioned set table IB2. The length of the IB3 can be varied, and the size in one width direction can also be set variably.

That is, in FIG. 4, the set table, in this case the above-mentioned set table 1112, includes a transportation table l.
A fixed reference wall l on the same side as the reference edge in B10.
B2O is provided, and a movable piece lB2 is provided at a position opposite to this.
1 is provided so as to be slidable in the width direction of the sheet document.

A support shaft 1B23 that supports a worm wheel 1B22 is rotatably attached to the movable piece 1B21, and a worm 1B24 that is directly connected to the rotating shaft of the pulse motor PH meshes with the worm wheel 1B22. ing.

On the other hand, the above-mentioned support shaft IB23 is inserted into a long hole IB25 having a longitudinal direction along the width direction of the sheet document on the document placement surface of the set table IB2.
Between the movable piece lB21 and the worm wheel l822
are facing each other.

One end of the worm IB24 is attached to an immovable wall part IB26 inside the device.
The worm wheel 1B22 is rotatably attached to the worm wheel 1B25, and when the worm wheel 1B22 is rotated, the worm wheel 1B22 is moved along the elongated hole 1B25 according to the direction of the rotational force.

The above-mentioned pulse motor PMI±, its rotation amount and rotation direction are set by a control unit, and the control unit controls the pulse motor PMI± according to the size of the sheet document detected on the feeding table IB10, for example. Performs drive control for PM.

The set table IB2 mentioned above. Export path 1B of 1B3
55 is provided with a sensor S1 that detects the conveyance of the sheet original, and this sensor S1 detects, for example, a failure in feeding out the sheet original or the absence of the sheet original on the setting table.

In the above configuration, when a sheet document is placed on the fully automatic feeding section IB, the sensor So detects the placement of the document, the locking piece IB13 advances into the feeding path, and the first switching As shown by the solid line in FIG. 2, the claw IB61 is
The orientation is set so that the sheet original is guided to the setting table.

In this state, when the leading edge of the sheet original is stopped by the locking piece IB13, the size of the sheet original is detected by the size detection section IB11, and based on this detection result, the second. Either of the third switching pawls IB62.11363 is 11 in Fig. 2.
The third switching claw IB63 is set to guide the sheet document to the introduction path IB4O of the lower cellar 1 and the table IB3.

When the size detection on the feeding table 1B10 is completed, the locking piece 1B13 retreats from the feeding path, and
The edge roller 1812 comes into contact with the feeding table lB1.
A sheet original is fed out from the main feeding path 1. The main feeding path 1 is fed by feeding roller IB60 in B6.
[The switching claw that is fed through the main feeding path IB6 and extends into the main feeding path IB6, in FIG. The conveyor device 184 transfers the material onto the cellar 1-tail 1133.

The sheet original introduced onto the set table IB3 is moved by its own weight until the leading edge of number -1 hits the guide Mylar IB50, and is placed in the re-feeding position.

Thereafter, the sheet originals sent to the feeding table IBIO are divided into one sheet on each set table in the same manner as described above.

Then, after the sheet originals are sorted, when a feeding start signal is output from the copying apparatus main body 2, the sheet originals are sorted according to the order in which they are placed on the feeding table by the original transport device IB of each set table.
5 and the first to third switching claws 1B61.1862. I
B63 is set in a position to feed the sheet original toward the two document placement tables, and the sheet document is fed to the two document placement tables via the main feeding path IB6.

(Effects) As described above, according to the present invention, it is possible to detect the size of sheet originals placed on the feeding table and to sort originals of various sizes based on this detection. This eliminates the need to standardize the size types of originals placed on the feeding table, and also eliminates the need to operate the guide plate on the feeding table, thereby facilitating copying operations. It becomes possible to promote this.

Furthermore, the feeding path for sheet originals used during sorting and the sorting can also be used as the feeding path when feeding subsequent sheet originals toward the document mounting table. In this case, it becomes possible to share the same device for sorting and refeeding, and the device can be simplified.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a part of a copying apparatus to which an embodiment of the present invention is applied, FIG. 2 is a schematic diagram showing an embodiment of the present invention, and Section 3.4
The figure is a schematic plan view showing main parts of an embodiment of the present invention. 1... Original feeding device, lB10... Feeding table. lB11...Size detection section, lB13...Locking piece, In2゜In2...Set table, In4...
...Manuscript loading device. In5...Document transport device, In6...Main feeding path, In61-IB63...First to third switching claws, In
7...Feeding route. b Figure-・-・-A4 thing l, , A3 wandering-411! -・-A3 Kakuboshi-・-1・-A4 charcoal,! -A2檗i 〃νγ

Claims (1)

[Scope of Claims] A feeding table for sequentially placing sheet-like originals of different sizes; and a feeding table located on the document feeding side of the feeding table and capable of moving forward and backward with respect to the feeding path of the sheet-like originals. and a locking piece that blocks the leading edge of the sheet document placed on the feeding table when it advances into the feeding path, and a locking piece that blocks the leading edge of the sheet document placed on the feeding table; means for detecting the size of the sheet original; and a plurality of stages each having a size corresponding to the size of the sheet original placed on the feeding table and set to different sizes. a set table; a document feeder provided on each of the set tables for introducing the sheet-like original into the set table; and a document feeder located below the document feeder for feeding the sheet-like original on the set table downward. The document feeding device that feeds out the document from the same set table in this state communicates with the feeding table and the setting table, and in the middle of the communication, it branches into the document introduction path of each set table, and also connects the document feeding device on the document feeding side. a main feeding path that is connected to each of the main feeding paths; a feeding path that branches above each of the set tables in the main feeding path and feeds a sheet document toward the document scanning unit; The switching means is provided at a branching point in the path and switches the feeding direction of the sheet original, and the main feeder is provided with a switching means for switching the feeding direction of the sheet original, based on the size detection of the sheet original placed on the feeding table. The document is introduced into one of the set tables corresponding to the size of the same document via the feeding path and sorted, and when copying, the sheet-like document in each set table is fed out and the document is scanned via the main feeding path. 1. A document feeding device characterized in that the document feeding device is configured to feed a document to a single document.