JPS60156073A - Copying machine provided with adf - Google Patents

Abstract

PURPOSE:To enable automatic both side copying of an original having images on both sides by installing a reverse side image detector and a feed direction reversing means. CONSTITUTION:An original having an image only on the surface and an original 12 having images on both sides are placed on a paper feed tray 11. The original is fed onto an exposure glass plate 14 with a paper feed roller 13, exposed there, and ejected with a belt 15. When the presence of an image on the reverse side is detected with a sensor 17 by an optical reflectance, an changeover plate P is displaced to change an ejection route, and the original is returned through rollers R9 and R10 to the paper feed tray 11. When an image is absent on the reverse side of the original, it is ejected onto an ejection tray 18.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in an automatic copying device for double-sided originals in a copying machine equipped with an ADF (automatic document feeder).

[Prior art]

When copying a large number of originals in succession, it is well known that by using a copying machine equipped with an ADF, the copying can be done extremely efficiently and unattended.

However, while the ADF is extremely convenient when copying originals with images on only one side, in the case of so-called double-sided originals with images on both sides, the image on the back side is copied continuously. I can't do it.

Therefore, when copying images on the back side of double-sided originals, the originals after the images on the front side have been copied are reversed, and then stacked again on the original table. , Al)
It is necessary to repeat the copying operation by F'.

In this case, it is easy if all of the originals are double-sided and require copying of images on the back side, but if such originals are mixed, then -
This work is extremely inefficient, labor-intensive, and troublesome work compared to the above-mentioned ADF copying work.

[Purpose of the invention]

An object of the present invention is to provide a copying machine with an ADF that can automatically and continuously copy front and back images of a double-sided document.

[Structure of the invention]

According to the present invention, an ADF-equipped copying machine is configured to detect an image on the back side of a document whose front side has been copied, turn the document upside down, and then send the document back to the document table to copy the back side. In a copier with an ADF,
Achieved by an ADF-equipped copying machine comprising a document detecting means for detecting the presence or absence of a document image on the back side opposite to the front surface on which a copy is made, and a document reversing means for reversing the double-sided document detected by the detecting means. be done.

〔Example〕

1 and 2 show first and second embodiments, respectively, of an automatic copying device for double-sided originals in a copying machine with an ADF according to the present invention, and each figure shows the main parts of the device.

In FIG. 1, reference numeral 1 denotes an original document mounting table, and the original documents 2 stacked thereon are taken out one by one from the top or bottom of the table and fed onto a platen glass 4 by rollers 3.

Reference numeral 5 denotes a conveyor belt driven by the rotation of a pair of shafts 5m and 5b, which moves the original 2 fed onto the platen glass 4 to the left by rotating in the forward direction, that is, clockwise. It acts to bring the front end surface into contact with the document stopper 6. Note that the conveyor belt 5 is configured to be able to rotate in reverse.

Reference numeral 7 denotes a document detecting means for detecting the back side of the document conveyed from above the platen glass 4 after copying, and a light emitting body A.
and a photoreceptor B, and when the back side of the document is blank, the document detection means 7Fi does not work and the SW connected to the AND circuit shown in Fig. 3 is kept in the OFF state, but the image is not detected. It has a function to act and turn on the SW when the switch is turned on.

R1 to R8 are a group of pinching rollers consisting of a driving roller and a driven roller, and they function to carry the original out of the machine, and they are placed at important points and have micro-swivels.

In collaboration with Chi MS1, MB2, and MB3, Japan-La R1, R4
By reversing K and R6, a document reversing means is configured for reversing the document from front to back.

Reference numeral 8 denotes a document collection tray, which is provided outside the copying machine, and is configured to sequentially stack and store copied documents.

Next, the operation in the first embodiment will be explained with reference to the program diagram shown in FIG.

After exposure of one side of the document is completed, the rollers R1, R6, R7 and R8 are rotated in the normal direction, and at the same time, the document stopper 6 is rotated counterclockwise 17 to release the restriction on the front end surface of the document 2, and at the same time, the conveyor belt 5 is rotated in the normal direction. In other words, it rotates clockwise, so the document 2
is conveyed leftward and moves toward roller R6. At this time, if the back side of the original 2 is blank, that is, if the original 2 is a one-sided original, the original detecting means 7 does not operate and the SW remains OFF. 17 Therefore, document 2 is transferred to roller R6.
, R7, and R8 and is detected by the microswitch Msl, the AND circuit does not act, and the document is further fed to the original collection tray 8 by the normal rotating roller R1.

On the other hand, if the original 2 is a double-sided original, the original detecting means 7 acts to turn on SW 11, and furthermore, the original 2 is a double-sided original.
6, R7, and R8, and when the rear end surface is detected after passing through the microswitch Msl, an AND circuit is activated, and the roller R1 is reversed, and the roller R2 is
, R3, and R4 are in a state where they start and rotate forward.

As a result, the original 2, which has been conveyed in the direction of the original collection tray 8 by the roller R1 to near the rear end surface, is reversely conveyed by the reverse rotation of R1, and is moved leftward by the roller R4 via the rollers R2 and R3. When the front end surface of the document 2 in the traveling direction is detected by the microswitch MS2, the roller R5 rotates forward, and the rollers R4 and R6 reversely rotate t7 to move the document 2, whose rear end surface has already passed the roller R3, to the right. Send it back again. At this time, when the rotation of the rollers R1, R2, and R3 is stopped, the value becomes K.

Next, when the rear end surface of the document 2 in the traveling direction is detected by the microswitch MS3, the conveyor belt 5 is reversely rotated, that is, counterclockwise, and after conveying the document 2 to the right, the delay circuit After a predetermined period of time, the original 2 is brought into contact with the original 6VC, and then stopped. Note that at the same time as the conveyor belt 5 switches to normal rotation, the rollers R4 and R5 are stopped.

When <L, the back side of the double-sided original 2 has been continuously copied, and the original 2 is again moved to rollers R1, R6, and R by the exposure end signal as in the case of the single-sided original described above.
7 and R8 are rotated in the normal direction, the document is transported to the document collection tray 8.

Incidentally, when the original 2 is stored in the original collection tray 8, copying is completed and the rollers R1, R6, R7, and R8 are all stopped.

In addition, in the second embodiment, as shown in FIG. 2, a branching plate P is installed in front of the document collection tray 18, and is rotatable to a central dotted line position, which is a fulcrum H. The apparatus is configured to operate in response to a signal from 17 to sort the originals 12 onto the original placing table 11 or the original collecting tray 18.

That is, the original 12 on the original placing table 11 is
After the exposure is completed at L, if the original 12 is a double-sided original, it is detected by the original detecting means 17, and the branch plate P rotates to occupy the position shown by the broken line.

Therefore, the original 12 is transferred to rollers R16, R17, R18.
, R11 contact the branch plate PK and the front and back sides are reversed. At this time, the microswitch MS4 is activated and the roller R9
゜The RIO is rotated in the normal direction and the original 12 is placed on the original placing table 11 again.
send it back on top.

On the other hand, if the original 12 is a one-sided original, the original detecting means 17 cannot detect an image and therefore does not operate. Therefore, the branch plate P remains at the position shown by the solid line, so the original 12 is branched. Guided by plate P, document collection tray 1
8, and the copying is completed. in this case,
Since the microswitch MS4 cannot detect the original 12, the rollers R9 and RIO do not rotate.

Note that after the double-sided original is exposed straight, the original detecting means 7 and 1 are arranged so that the original is not reversed and copied again.
In both cases, the control section of the present invention is provided with a function of counting and limiting detection signals from the same document only once as a program.

〔Effect of the invention〕

The present invention makes it possible to automatically and continuously copy the front and back sides of a document rather than detecting the images on the back side of the document individually. A very convenient and efficient method for copying a group of original documents.
A copy machine with D/F was provided.

[Brief explanation of the drawing]

1 and 2 are main part configuration diagrams of a copying machine according to the present invention. Third
The figure is a diagram showing its function. 1.11... Original plate 2,12... Original 4.1
4...Platen glass 5.15...Transport belt 6.16...Document storage rack 7.17...Document detection means 8.18...Document collection tray P...Divergent plate R...・Laura agent Patent attorney Yoshi Noda Chiya

Claims (1)

[Claims] A copying machine with an ADF includes a document detecting means for detecting the presence or absence of a document image on the back side opposite to the front surface on which a copy is made, and a document reversing means for reversing the double-sided document detected by the detecting means. Copy machine with ADF.