JPS62111854A - Original handling device - Google Patents

Abstract

PURPOSE:To make it possible to satisfy the alignment of an original copy during discharge thereof, by retarding the conveying speed for a predetermined time after a detect means for detecting a discharge of an original copy detects the trailing end of the original copy. CONSTITUTION:During a discharge of an original copy, when an outlet sensor 13 is turned on, waiting is made until the outlet sensor 13 detects the trailing end of the original copy. Further, the trailing end of the original copy has passed through the outlet sensor 13, the drive speed of a conveying motor 19 is dropped to a low speed. Thereby, at the time when the trailing end of the original copy comes out, the kick-out amount of the original copy is made to be less since the speed is low, and therefore satisfactory loading alignment may be obtained. Further, the normal conveyance of an original copy is made at a high speed but the speed is retarded only for a predetermined time during the discharge of the original copy, and therefore, it is possible to minimize the time of changing original copies without the performance of the device is deteriorated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an apparatus for feeding a document to an exposure position and ejecting the document after the exposure operation is completed.

[Prior art]

Generally, in an image forming apparatus such as a copying machine, a document handling device (hereinafter referred to as DF) that feeds a document to a predetermined position such as an exposure position is sometimes used.

Such document handling devices are often made optional as add-on devices such as copying machines, and are therefore subject to various restrictions. For example, small size and light weight.

It is thin, has a low cost, and is functionally shortened to the shortest possible time for replacing documents, and automatically detects the document size.
Examples include good conveyance of originals.

However, when the DF is configured to be thin, there is a risk that the consistency when the document D1 is output may be deteriorated.

[1-1] The present invention has been made in view of two points, and its purpose is to improve the consistency when outputting original documents and to shorten the time required to exchange original documents. The object of the present invention is to provide a highly capable document handling device.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram showing an embodiment of a document handling device to which the present invention can be applied. In the figure, reference numeral 1 indicates an input tray 11 on which sheet originals are stacked, and the sheet originals 2 of that person are stacked with the F side in the figure facing up (image side). The document detection population sensor 3 of il is a reflective sensor that detects the leading edge and trailing edge of a sheet document. The feed rollers 4 and 5 are in pressure contact with each other to sandwich and convey the sheet original.

Reference numeral 6 denotes a stopper that prevents the document from being fed to the platen glass I-.
6 is released and enables feeding.

The entire surface belt 7 has an rl large enough to cover the other side of the sheet document. (This is an end belt, and the surface has a friction coefficient of 1f sufficient to displace the platen crow 101 and convey the document by frictional force, and the drive roller 8
and U-turn rollers 9, and the entire belt 7 and drive roller 8 are strung together to prevent slippage. Furthermore, the υ1 output rollers 11 and 12 are in pressure contact with each other, and sandwich and transport the original used from the original crow 10. The document detection sensor 11 is a reversible type sensor, and once the exit sensor 13 detects the leading edge of the document, the entire surface of the belt 7 and the roller 1. 1 and 12, and then starts running in reverse [1] When the sensor 13 detects the rear end of the original f14, it stops at a predetermined position 1. After the exposure operation is completed, the original sent by the initial rollers 1 ], , 12 is transferred to the IJ
The paper is fed along the I paper guide plate 14 and is transferred to the paper I sheet 171 by the paper rollers 15 and 16 pressed against each other.
tn times are loaded. Furthermore, the feed roller 4, the full-surface belt drive roller, and the 1/1 output rollers 11 and 15 are driven by the drive motor 1.
9.

Next, FIG. 2 is a block diagram showing a control section of a document handling device (hereinafter referred to as DF). 30 in the figure is a well-known microcomputer (hereinafter referred to as ttcOM), and
T is an interrupt port, into which pulses from the clock generator 20 when the drive element 19 rotates are input. The operation of the DF is controlled based on this pulse signal. The human power port P1 has a second document detection sensor (human [] sensor).
A signal from the paper discharge detection sensor (output 11 sensor) 13 is inputted to the input port P2. In addition, from the output port Fo-F3, the inputs to Il and cOM30 are connected to the drivers D1 to D, respectively.
4, forward and reverse drive signals of the transport motor 19,
The drive signal for Tsuba ST-21 is output.

Further, a DF start signal from the copying machine main body is input to the input port P3, and a copy start signal -3- to the copying machine is outputted from the output port F4.

FIG. 3 is a flowchart 1 for explaining operation f) according to the present invention. Hereinafter, the explanation will be given according to this flowchart I.

A paper feed star I/reliance is output from the copying machine main body, a document is placed in the input tray 1, and when the sensor 3 detects the document, the transport motor is turned on in normal rotation (Step 1). Then, after hitting the document stopper 6 and waiting 0.4 seconds, the stopper solenoid 21 is turned on to release the stopper 6 (S
step 2).

As a result, the original is guided to the platen glass 10, and when the entrance sensor 3 detects the rear edge of the original, 0.1 sec.
After that, the stopper solenoid 21 is turned off and the stopper 6 is lowered to prevent the next document from being inserted (St.
ep3). The document fed through the platen glass 10-4- passes through a predetermined position and reaches the exit sensor 13 on the FBE side. When the output T-1 sensor 13 detects the leading edge of the document (Step 4), the transport motor 19 stops rotating in the forward direction, then rotates in the reverse direction, and the document is transferred to the platen glass 10.
Start moving in the direction (Step 5). Exit sensor 13
When the original detection is turned off, the [stop counter] is counted from the exit sensor 13 to a predetermined position on the platen glass 10J-, and when the process ends, the motor is stopped 1-. Then port F4
outputs a copy request signal to the main body, and the main body starts the exposure operation.

After the exposure is completed, the process moves on to the document printing operation. The main unit outputs the paper feed start signal again (Step 6), and the transport motor 1
9 in the forward direction, and perform the above-mentioned [search count from the platen]
is started, and the exit sensor 13 is checked at the end (Step 7). If no detection is detected here, the apparatus is stopped, and it is determined that there is an abnormality in the document on the platen. - If Yoshikawa 11 sensor 13 is turned on, exit sensor 1
3 waits until the trailing edge of the document is detected (Step 8). Then, as shown in FIG. 4, until the trailing edge of the document passes through the exit sensor 13, the conveyor 1! '' can be driven at low speed by using the well-known PWM drive. As a result, the loss rollers l 5 , 1. n is II; t Jl: 11 At the point when the rear end comes out, the kick-off j is 1, or it is low speed, so less is needed, and good loading alignment +I (l, 1 is done. Furthermore, normal conveyance is done at high speed Li By slowing down the speed for only one step when 4Jl is output, the time required for document exchange lx 1+! can be minimized without degrading the performance of the device.5tep
At step 9, the [Usage Counter] performs low-speed transport for a certain period of 1111, and then starts again.

[Stop counter], HJI:+l+count], etc. are set in a predetermined area of the RAM in the microcomputer 30, and the clock pulses from the transport lock generator 20 are .

〔effect〕

As explained above, by setting the normal j;C document conveyance speed 1 to a high speed and slowing down the conveyance speed only for a predetermined period when 1Jl of the document is output, it is possible to 1) There is an effect that one banknote conformity can be realized. Furthermore, with regard to document exchange time, by simply reducing the speed during a short period when the document is being lost, most of the other speeds during transport can be made high, which has the effect of reducing the document exchange time by 11i.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a document handling device to which the present invention can be applied, FIG. 2 is a block diagram showing a control section of the document handling device shown in FIG. 1, and FIG. 3(a). (b) is a flowchart 1 for explaining the operation of the document handling device. FIG. 4 is a diagram for explaining PWM drive of the motor. 1-----Person 11 Tray 3-------Person 1 sensor 6-------Swivel 7-------Full surface belt 10-m-Platen glass 13-----Out "1 sensor 171--Publication) Sea 19--Transportation motor 20-m-Transportation lock generator 21--Suba solenoid 30-1-Microcomputer 1'eP9

Claims (1)

[Claims] A device that feeds a document to an exposure position and discharges it after completing the exposure operation, which has a detection means for detecting discharge of the document, and slows down the conveyance speed for a certain period of time after the detection means detects the trailing edge of the document. A document handling device characterized by: