JPS6127844A - Automatic conveying device for original - Google Patents

Abstract

PURPOSE:To raise the operational convenience, and prevent an error in the operation, by making it possible that a tray for an interruptive original is inserted when an original feeding roller is in its withdrawn position, and at the same time, setting an insertion detecting means, in a device as shown in the title, of such as a copying machine. CONSTITUTION:When it is intended that an interruptive original is inserted, an interruptive sheet feeding mode is prepared by operating an interruption key which is not shown in the figure. In case that a sensor 11 does not detect an original, an original feeding roller 2 moves to its restorational position 2b, and it becomes possible that a tray 4 for an interruptive original is inserted. When the tray 4 is inserted and sensors 5 detect this matter, the said roller 2 moves to the position 2c shown as a real line in the figure, where the roller 2 is pressed against the interruptive original sheet 16, and conveys this sheet 16. When the said tray 4 is pulled out and the sensors 5 detect this matter, the roller 2 begins conveying the original sheets 15 set in their regular position, again. In this way, it becomes easy to insert an interruptive original sheet, and an error in the operation can be prevented.

Description

[Detailed Description of the Invention] Technical Field> This invention relates to an automatic document feeder (hereinafter referred to as AD
It's called F. ) regarding.

<Prior art and its drawbacks> As shown in Fig. 4, an ADF used in a conventional copying machine, etc. has a document tray 1' on which a document is loaded, and a document tray 1' that feeds the document toward the document table by rotating in the direction of arrow A. Original feed roller 2'
It is equipped with This document feed roller is pulled downward by the elastic force of a spring (not shown), and is brought into contact with the documents stacked on the document feed tray 1' with appropriate pressure. In addition, this document feed roller
After the document feeding operation is completed, it is moved to the retracted position indicated by the two-dot chain line in the figure. Furthermore, a sensor 3' is provided for detecting that a document is loaded on the document tray.
After detecting that a document is loaded, the document feeding roller moves from a retracted position to a position where it comes into pressure contact with the document by operating a start button on a device such as a copying machine, and rotates to feed the document. There is.

However, none of the above-mentioned conventional ADFs has a function related to an interrupt feeding operation of a document. Therefore, if multiple originals are loaded on the original tray and it is necessary to feed another original while feeding, first remove the original loaded on the original tray, load the interrupt original on the original tray, and start. I had to press the button to feed the paper.

Therefore, when it becomes necessary to feed an interrupt document,
The operation is very complicated, and there is a possibility that a cent error may occur when reloading the originals after the interrupt operation is completed.

<Object of the Invention> In view of the above-mentioned conventional inconveniences, the present invention provides an ADF device with an interrupt feed operation function for originals, so that when it becomes necessary to feed originals in advance, the originals loaded on the original tray can be It is an object of the present invention to provide an ADF that does not require removal, improves operability, and can prevent erroneous operations.

<Structure and Effects of the Invention> To summarize, the present invention is configured such that an ADF is removably inserted into the main body of the apparatus so that an original can be inserted under the original feeding roller when the original feeding roller is located at the retracted position. The present invention is characterized in that it includes an interrupt original tray and a detector that detects when the interrupt original tray is inserted.

According to the present invention, by configuring as described above, the AD
It is possible to equip the F device with an interrupt feeding operation function for originals, which eliminates the need to remove the originals loaded on the original tray when feeding originals, thereby improving the operability of the ADF. This provides the advantage of being able to prevent erroneous operations.

<Embodiment> Figure 1 shows an embodiment of this invention installed in a copying machine.
FIG. 3 is a cross-sectional view showing a schematic structure of a DF.

The ADF main body is composed of a document cover portion 14 located above the document table, and a document feed section 13 located on the right side of the document cover portion 14 for feeding a document to the document cover portion. Original paper feed section 13
A main tray 1 is fixed to the right side of the main tray 1 for loading originals to be automatically fed downwards, and an interrupt original tray is removably installed above this tray to allow insertion of an interrupt original when an interrupt original is fed. , and each tray has an opening so that a document can be inserted into the document feeder.

A document feed roller 2 is disposed on the right side of the interior of the document feed section 3, and document conveyance rollers 0-rough a and 7b are disposed on the left side. The document feed roller 2 is the document transport roller 7.
3 through a pulley and belt (not shown), and rotates in the direction of arrow A. Further, the document feed roller 2 is allowed to move up and down using the center of the document transport roller 7a as a fulcrum. When the document feeding is completed, the document returns to the retracted position 2b indicated by the two-dot chain line in the figure, and when the document is fed, the document is moved in the direction of the document pressure contact position 2a indicated by the solid line in the figure by the elastic force of a spring (not shown) and is loaded onto the main tray 1. press against the original. To move the document feed roller,
It is operated by known functions such as a solenoid and a spring (not shown). In addition, an interrupt prevention member 6 is attached to the center of the document feed roller 2, and when the document loaded on the main tray 1 is being fed, the interrupt prevention member 6 blocks the insertion opening of the interrupt document tray 4, and prevents the interrupt tray 4 from feeding the document. It is designed so that it is not inserted into the paper section 13 and interferes with the document feed roller 2. When a document interrupt key (not shown) is operated, the document feed roller 2 moves to the return position 2b, and the insertion opening of the interrupt document tray 4 is opened so that the document can be inserted.

A sensor 5 for detecting insertion of an interrupt original tray is provided on the right side of the document feed roller 2, and a sensor 3 for detecting that a document is loaded on the main tray I is provided on the left side. Inside the document cover part 4, document transport rollers 7c and 7d are arranged on the right side of the document table 12 of the copying machine, and furthermore, above the document metal part 2, a transport belt 8 and a belt roller 8a for driving the belt are arranged. It is set up. Between the document conveyance rollers 7C and 7d and the conveyance belt 8, there is a sensor 11 that detects the conveyance of the document, and a sensor 11 that detects the conveyance of the document. A stopper 9 for waiting is arranged so as to be movable up and down.

Figure 2 shows an embodiment of this invention installed in a copying machine.
FIG. 3 is a schematic cross-sectional view showing the document feeding operation of the DF.

When one or more documents are loaded on the main tray 1, the sensor 3 detects this, and by operating the start button of the copying machine, the document feed roller 2 moves from its return position 2b to the pressure contact position fli2a. It moves and comes into pressure contact with the stacked documents,
By rotating in the direction of arrow A, the re-guide members 10a and 10b
The paper is fed between the document transport rollers 7a and 7b. The document is conveyed into the document cover part 14 by the rotation of the document conveyance rollers 7a and 7b, and is conveyed toward the document table between the guide member 10c and the guide member 10d by the rotation of the document conveyance rollers 7C and 7d. . When the front end of the document reaches the position of the sensor 11, this is detected, and if there is no document on the document table 12, the stopper 9 moves in the direction of arrow B and the conveyor belt 8
The document is placed on the document table 12 by the following steps. When copying is completed on copy paper by the operation of the copying device, the original is discharged to the outside from an opening (not shown) by a conveyor belt.

The above automatic feeding operation continues while the sensor 3 is detecting the originals loaded on the main tray 1, that is, until there are no originals on the main tray 1.

If it becomes necessary to interrupt feed another document during this automatic document feeding operation, a document interrupt key (not shown) is operated. By this operation, the interrupt feeding mode for the original is selected, and when the sensor 11 does not detect an original, the original feeding roller 2 moves to the return position 2b, and the interrupt original tray 4 can be inserted. When the interrupt document tray 4 is inserted and the sensor 5 detects this, the document feed roller 2 moves from the return position 2b to the interrupt document 1 shown by the solid line in the figure.
Move to position 2C where it comes into pressure contact with 6. Thereafter, due to the rotation of the document feed roller 2, the interrupted document 16 is transferred to the transport roller 7.
A and 7b are fed, and then, like the originals 15 stacked on the main tray 1, the originals are conveyed to the original table 12. After the feed operation of the interrupt document 16 is completed by this operation, when the interrupt document tray 4 is pulled out from the document feed section 13, the sensor 5 detects this, and the interrupt document feed mode is canceled and the main tray L is simultaneously moved. The feeding operation of the stacked documents 15a is started.

As mentioned above, from the main document feeding operation to the interrupt document feeding operation,
Or, there is no time loss when changing the reverse operation, and AD
F can be operated efficiently. Furthermore, since there is no need to move the originals loaded on the main tray l during the interruption original feeding operation, there is no possibility of losing or soiling originals, or erroneous operations such as changing the insertion direction or order of originals.

FIG. 3 is a schematic diagram of the appearance of an interrupt document tray attached to an ADF according to an embodiment of the present invention.

At one end of the interrupt document tray "4 parallel to the insertion direction (direction of arrow C) into the document feed section, there is a reference guide 4a that indicates a reference position in a direction perpendicular to the loading direction when inserting an interrupt document.
is fixed. Further, a sling 4c is opened from the other end opposite to this end, and the document guide 4b can be fixed at any position using screws and a tightening device (not shown). Also, near this slit 4C, an indicator (not shown) indicating the position of the paper size such as A4, B5, etc. is drawn, and by positioning and fixing the document guide 4b at the position of the paper size of the interrupt document to be inserted, The interrupted original can be inserted at the appropriate copying position. Further, a long hole portion 4d is provided in the center of the interrupt document tray 4.

Before the interrupt document tray 4 is inserted into the document feed section, the light beam from the light emitting section 5a of the sensor does not reach the light receiving section 5b. When the interrupt document tray 4 is inserted in the direction of the arrow C, the sensor moves in the direction of the arrow C' relative to the tray 4, and the light beam from the light emitting part located at 5a' passes through the elongated hole 4d and reaches 5b'. The light is received by the light receiving section located at , and the insertion of the interrupt document tray 4 is detected. - With the above-described configuration, it is possible to detect that the removably inserted interrupt document tray 4 is inserted into the document feed section, and the operation of the document feed roller 2 is started.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the schematic structure of an ADF that is an embodiment of the present invention, and FIG. 2 is a view showing the document feeding operation of the ADF.
FIG. 3 is a schematic diagram of an interrupt document tray used in the ADF, and FIG. 4 is a sectional view showing the schematic structure of a conventional ADF. 1-main tray, 2-document feed roller, 4-interrupt document tray, 5-sensor.

Claims (1)

[Claims] (1) An automatic machine comprising a document tray on which documents to be fed are loaded, and a document feed roller that comes into contact with the documents loaded on the document tray during document feeding and moves to an upper retracted position after paper feeding is complete. The document feeder includes an interrupt document tray that is removably inserted into the device main body so that an interrupt document can be inserted below the document feed roller when the document feed roller is in a retracted position, and the interrupt document tray. An automatic document feeder comprising: a detector that detects when a document is inserted;