JPH03100671A - Automatically document feeding copying machine - Google Patents

Abstract

PURPOSE:To easily obtain a high copying speed without speeding up document feeding by exposing a first copy in the same manner as recirculating exposure, when the number of copies is one or even plural in document automatic feeding mode. CONSTITUTION:In the document automatic feeding mode, the machine determines whether document image exposure is performed with the document stopped or not stopped on a platen glass 21 according to whether the number of the copies is one or plural. When copying is performed in the document automatic feeding mode, the document width is, first, put between a document placing part 8 and a width position regulating plate 9. In the case only one copy or a first copy among plural copies, an exposure lamp 37 in a fixed position exposes a document passing through an exposure part. In the case of the exposures of plural copies or second and subsequent copies, the moving exposure lamp 37 exposes a document staying in the exposure part. Thereby, high copying speed is easily obtained without speeding up document feeding.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic document feeding copying machine, and in particular, the present invention relates to an automatic document feeding copying machine, and in particular, a document in a document stacking section is sent to an exposure section for one sheet, and the exposure section copies several copies. The present invention relates to a non-circulation type automatic document feeding copying machine in which a document is discharged to a document discharge section after being exposed to light.

[Conventional technology]

There are two types of automatic document feeding copying machines: original circulation type and non-circulation type. In the original circulation type, the document is fed out one sheet from the document stacking section, and as it passes through the exposure section, it is exposed to light. When copying multiple copies, the ejected original is dropped into the original stacking area when there are no more originals in the original stacking area, and then sent out again for one sheet to be exposed. This is a copying machine that repeats exposure until several copies have been exposed. Exposure in the original circulation type is performed by an exposure lamp fixed in position, and exposure in the original non-circulation type is performed by an exposure lamp that moves while stopping the original.

The document circulation type has the advantage that the exposure device is simple and high copying speeds can be easily obtained. Since the ejected originals must be turned over or turned all at once when dropping them onto the original stacking area, the device for this is not only very complicated, but also has the disadvantage that the originals are very easily damaged. There is. On the other hand, the advantages and disadvantages of the non-original circulation type are almost opposite to those of the original circulation type.

[Problem to be solved by the invention]

The present invention is a non-circulation type automatic document feeding copying machine that does not have the disadvantages of the original circulation type, but also has the advantage of the circulation type in that a high copying speed can be easily obtained without increasing the original transport speed. This was partly done for the purpose of providing a copying machine that could be obtained.

[Means to solve the problem]

The present invention provides an automatic document feeding copying machine in which a single document in a document stacking section is sent to an exposure section, where the exposure section exposes copies several times, and then the document is discharged to a document discharge section. , when the number of copies is 1 copy or the first copy of multiple copies, the exposure lamp is fixed in position with respect to the original passing through the exposure section, and when the number of copies is 1 or more copies, the second and subsequent copies of the number of copies are In this case, there is an automatic document feeding copying machine characterized in that exposure is performed by a moving lamp with respect to a document stopped at an exposure section, and this configuration achieves the above object.

[Effect]

In other words, the automatic document feeding copying machine of the present invention can make only 1 copy.
When copying a copy, or even when there are multiple copies, the first copy is exposed in the same way as in the circulation type, so high copying speeds can be easily obtained, and moreover, it is a non-circulation type. Therefore, there is no drawback of the circulation type, the document conveying device is relatively simple, and the document is less likely to be damaged.

〔Example〕

The present invention will be described below with reference to the drawings.

FIG. 1 is an external perspective view showing an example of a copying machine according to the present invention, FIG. 2 is a schematic partial side view showing an example of an automatic document feeder, and FIG.
The figure is a partial perspective view showing an example of a drive mechanism of an automatic document feeder.

In the figure, l is the copy start button on the control panel of the copying machine, 2 is a key group including the numeric keypad, stop/clear key, etc. for specifying the number of copies, and 3 is the specified number of copies (l if not specified by the numeric keypad). The display changes to a number that is subtracted by l each time the copy paper feed system (not shown) discharges copies of the same original to the copy paper output tray, and when the display becomes O, the specified number of copies is set again. The number of copies display section displays 4, which indicates that automatic document feeding mode or manual feeding mode has been selected depending on whether it is lit or off, and will repeatedly flash if neither of the above modes is selected. A mode display lamp 5 indicates the number of originals copied in the automatic document feeding mode, and an abnormality indicator 6 indicates the number of copy sheets or the location where a jam has occurred.

7 is an automatic document feeder, 8 is a document stacking section, and 9 is a pair of right and left racks, each of which has a rack 9A provided at the bottom thereof and a binion 8A rotatably bent to the bottom side of the document stacking section 8.
and a width position regulating plate that can move symmetrically toward and away from each other by being engaged with the pinion 8A between them.
10 is a document size sensor that detects the position of the rack 9A to provide document width information and therefore document size information; 11 to 14 are first to third document size sensors provided on the document conveyance path from the document stacking section 8 to the document discharging section 15; The mode display lamp 4 lights up based on the information that the first document sensor 11 detects a document, indicating that the document is in automatic document feeding mode.

16 is a leading edge position regulating plate that aligns the leading edges of the sheet-like originals placed on the original stacking section 8; 17 is a leading edge position regulating plate that contacts the upper surface of the original placed on the original stacking section 8 and rotates in the direction of the arrow; This is a friction feed roller that sends out the uppermost document, and when the friction feed roller 217 is displaced from the solid line position to the dotted line position,
The leading end position regulating plate 16 is also displaced from the solid line position where its counterclockwise rotation around the support shaft 16A is stopped by a stopper (not shown) to the dotted line position where it does not interfere with the feeding of the document.

18 is a friction feed belt 18A that rotates in the direction of the arrow and a sorting roller 18 that is stationary or rotates at a slow speed counterclockwise.
19 is a nipping feed roller that further feeds the document sent by the separating and feeding device 18; 20 is a nipping device for placing the original on the platen glass 21 and applying nipping pressure from above the platen glass 21; This is a platen upper feed belt that rotates in the direction of the arrow when discharging the document to the document ejection unit 15 via the ejection roller 22, and 20A and 20B are a driving roller and a driven roller that stretch the platen upper feed belt 20, and 20C. 20D is a tension roller of the platen upper feed belt 20, and 20D is a push roller that brings the platen upper feed belt 20 into pressure contact with the upper surface of the platen glass 21.

When a document is placed on the platen glass 21, the document 23 is displaced so that its upper end protrudes above the top surface of the platen glass 21 as shown in the figure, and the document is discharged from the platen glass 21 to the document discharge section 15. This is an exposure section stopper whose upper end is retracted and retracted below the upper surface of the platen glass 21. The exposure section stopper 23 is connected to the platen upper feed belt 2.
The drive is controlled by a control device (not shown) of the copying machine so that the upper platen feed belt 20 retracts just before the belt 20 starts rotating and projects just before the upper platen feed belt 20 stops. Thereby, the influence of resistance etc. exerted by the exposure section stopper 23 on the platen upper feeding belt 20 can be reduced.

The automatic document feeder 7 rotates counterclockwise from the position shown in the second figure with the lower roller shaft 22A of the pinch discharge roller 22 as the rotation axis, or an axis parallel to the platen surface on the back side of the paper in the second figure. It can be opened and rotated so that the front side of the paper surface is raised at the center, and 24 is a feeding device open sensor that detects whether or not the automatic document feeding device 7 is opened and rotated from the illustrated position.

The document feeding system from the friction feeding roller 17 to the pinching discharge roller 22 is controlled by the control device of the copying machine, and the rotation speed in the counterclockwise direction in FIG. 3 is switched in at least two stages. It is driven by a motor 25, for example a DC servomotor, consisting of a combination of a DC motor and a speed control device using an encoder or a tachogenerator, which also rotates in reverse. That is, the rotation of the motor 25 is transmitted from the motor pulley 26 to the carrier pulley 27 by the timing belt, and then the rotation of the motor 25 is transmitted to the carrier pulley 27 by the timing belt.
The signal is transmitted from the deceleration carrier pulley 28 rotating integrally with the roller 19 to the input pulley 30 of the electromagnetic clutch 29 and to the roller pulley 19A integrated with the roller 19 which is pinched and fed by a timing belt, and the electromagnetic clutch 29 is controlled by the control device of the copying machine. Under the condition that the input pulley 30 is turned on, the rotation of the input pulley 30 causes the output shaft gear 32 integrated with the output shaft 31 and the friction feed bell l- of the separation feed means 18 that meshes with it.
18A, and is further transmitted from the core pulley 34, which rotates together with the core gear 33, to the roller shaft pulley 17A, which is integrated with the friction feed roller 17, by a timing belt. , the nipping and feeding roller 19, the friction feeding roller 17, and the separating and feeding means 18 are driven. Note that the sorting roller 1 of the sorting and feeding means 18
When 8B rotates in a counterclockwise direction, the rotation can be provided by, for example, a rocking crank and a ratchet mechanism driven by the rotation of the belt core shaft. The drive of the platen upper feeding belt 20 and the pinching discharge roller 22 is as follows.
The rotation of the carrier pulley 27 described above is transmitted to the output pulley 36 when the electromagnetic clutch 35 controlled by the control device of the copying machine is turned on, and from the output pulley 36 is transmitted to the drive roller 2O of the platen upper feeding belt 20 by a timing belt.
A and the driven roller 20B of the platen upper feeding belt 20.
The rotation of the roller shaft pulley 20BP of the pinching and discharging roller 22 is caused by the timing belt.
This is done by being told to P.

In the control device of the copying machine, for example, the automatic document feeder 7 is
When the main switch (not shown) is turned on when the document is in the closed position shown in the figure and FIG. The mode display lamp 4 is made to blink based on the absence information and the close information of the feeding device open sensor 24. In this state, the copying operation is prohibited even if the copying start button 1 is pressed after preparations for starting the copying operation, such as increasing the temperature of the fixing device, are completed.

On the other hand, when the automatic document feeder 7 is released and the open information of the feeder open sensor 24 is input to the control device, the control device controls the automatic document feeder 7 while inputting the open information and when the document feeder is closed again. The mode display lamp 4 is kept in the off state for manual feeding mode selection until a predetermined time determined by a timer or pulse count after information is input. In this state, the copy start button is pressed regardless of whether or not the document is placed at the exposure section position on the platen glass 21 provided by the exposure section stopper 23 and whether or not the automatic document feeder 7 is closed. When l is pressed, the following copying operation is performed under the control of the control device. Rotation of a photoreceptor drum (not shown), cleaning of its surface, and charging of the cleaning surface, movement of the exposure lamp 37, etc. from the solid line position to the dashed-dotted line position in FIG. Repeating the formation of an electrostatic image on the charged surface of the photoreceptor drum several times for copying by scanning the original image projection;
Development of electrostatic image into toner image each time, 85% for each toner image
．． Feeding copy paper from either A4, 84, etc. paper cassette or paper feed tray, transferring and fixing the toner image onto it, ejecting the resulting copy paper to the copy paper output tray, and finally After completing the original image projection scanning movement, the exposure lamp 37 and the like return to the position shown by the solid line, thereby completing the series of copying operations. In this case, if the automatic document feeder 7 is closed before the copying operation is finished, the mode display lamp 4 is changed to a blinking state when the copying operation is finished. Therefore, in order to perform copying in the manual feeding mode again next time, the automatic document feeding device 7 must be opened and the mode display lamp 4 must be turned off again to indicate manual feeding mode selection.

An exposure lamp 37 is provided so that a series of copying operations in the above-mentioned manual feeding mode can be performed quickly when a plurality of copies are to be made.
Detects the size of the original on the platen glass 21 when moving from the solid line position to the dashed-dotted line position, or selects copy paper using a copy paper selection button (not shown) on the control panel, and selects one of the copy paper sizes. Exposure lamp 37 based on information
The document image projection scanning movement distance in the direction of the arrow can be determined from the dashed-dotted line position.

With the automatic document feeder 7 closed, the document is placed on the document stacking section 8 with the leading edge touching the leading edge position regulating plate 16, and the document presence information of the first document sensor 11 is sent to the control device 5. When input, the control device turns on the mode display lamp 4 to select the automatic document feeding mode, regardless of whether a document is placed on the platen glass 21 or not. In the automatic document feeding mode, the control device determines whether to perform document image exposure without stopping or stopping the document on the platen glass 21, depending on whether the number of copies is one or more. When copying is performed in this automatic document feeding mode, the width of the document on the document stacking section 8 is first sandwiched between the width position regulating plates 9. Accordingly, the document size sensor 10
gives document size information to the control device, and based on that information, the control device determines the position of the exposure lamp 37, etc. during exposure of the first document image when the number of copies is 1 or multiple copies, and the position of the exposure lamp 37 etc. when the number of copies is 1 or multiple copies. The scanning movement distance of the exposure lamp 37, etc. during exposure of the image of the second and subsequent copies of the original, the standby position of the original sent after the original sent onto the platen glass 21 when a plurality of copies are to be made, B5. The copy paper size, such as A4.84, is also determined.

Therefore, when the copy start button 1 is pressed, the following copying operation is started under the control of the control device.

Rotation of the photoreceptor drum, cleaning and charging of its surface, and if the document size is small, movement of the exposure lamp 37, etc. at the solid line position in FIG. Regardless of the situation, the friction feed roller 17 is lowered by an elevating means (not shown), and then the friction feed roller 17 is driven in the direction of the arrow from the nipping pressure discharge roller 22, and as a result, the document stacking section 8 is moved from the top One original is sent out. platen glass 21
If an original has been placed on top of the original, the original is ejected to the original ejection section 15 by rotation of the platen glass upper feed belt 2o in the direction of the arrow, and is not copied. The exposure lamp 37 is turned on before the leading edge of the first document sent out from the document stacking section 8 reaches the illumination position of the exposure lamp 37, which is at the solid line position or the two-dot chain line position, and the document is illuminated by the illumination. By passing through the photoreceptor drum, image exposure is performed on the charged surface of the photoreceptor drum to form an electrostatic latent image, and the electrostatic latent image is developed into a toner image and the photoreceptor drum is attached to copy paper according to the size of the original. The toner image is transferred and fixed onto the fed copy paper, and the resulting copy paper is discharged to a copy paper output tray.

In this case, the copy paper is fed in when the leading edge of the original reaches the illumination position of the exposure lamp 37 based on the information that the third original sensor 13 near the illumination position of the exposure lamp 37 detects the leading edge of the original, and the leading edge of the original image is transferred. This is done so that the leading edge of the copy paper reaches the transfer position at that time.

When the number of copies is 1, the pinch feed roller 198 and the platen upper feed belt 20 are continuously driven in the direction of the arrow,
The exposed document passing through the illumination position of the exposure lamp 37 is discharged to the document discharge section 15. And friction feed roller 1
7 and the separating/feeding means 18 are continuously driven in the direction of the arrow, or in order to maintain a distance between the original and the previously sent original.
A predetermined period of time starts from when the trailing edge of the document, which is determined from the information that the second document sensor 12 or the third document sensor 13 detects the leading edge of the document, the document size information, and the document transport speed, reaches the feeding position of the friction feed roller 17. After stopping for a time, the drive is repeated in the direction of the arrow, and the documents on the document stacking section 8 are sent out one by one from the top. Like the first original, the fed originals pass over the platen glass 21 one after another and are copied, and then are ejected to the original ejecting section 15, where they are transferred from the friction feeding roller 17 to the pinching ejection roller 22.
The document feeding system up to this point stops when the last document for which the first document sensor 11 detects that there is no paper has passed through the nipping discharge roller 22. Before that, the last original is exposed to the exposure lamp 37.
Since it is known by the detection of the leading edge of the last document by the fourth document sensor 14 that the document has completed passing through the illumination position, the exposure lamp 37 is turned off and returned to the solid line position. When the last original document passes over the platen glass 21 and the last copy sheet is ejected from one copy paper ejection tray, the copy paper feeding system also stops and the series of copying operations ends.

When a plurality of copies are to be made, the first document that has passed through the illumination position is stopped at a position where the leading edge abuts the exposure section stopper. For example, the motor shown in FIG. 25, thereby stopping the platen upper feed belt 20. At this time, the rotation of the friction feed roller 17 is stopped by the electromagnetic clutch 29 when the leading edge of the document is nipped by the pressure feed roller 19 in order to prevent double feeding of the document.
This is done by turning off the .

When the motor 25 is stopped, the exposure lamp 37 is turned off and moved to the position indicated by the dashed line.
etc., after reaching the dot-dashed line position, the exposure lamp 3
Scanning exposure by moving a distance according to the document size in the direction of the bold arrow such as 7th grade is n-1, which is 1 less than the specified number of copies n.
repeated times. By performing this scan exposure n-1 times, the specified number of copies, including the copies obtained by exposing the original until it reaches the exposure unit stopper 23, is ejected to the copy output tray. It becomes like this. Also, during this n-1 scanning exposure, the friction feed roller 17, its elevating means, and the separating feed means 18. The pinch discharge roller 19 is driven, and the next document is sent out from the document stacking section 8, and the tip is placed in a standby position where it occupies an appropriate position between the pinch feed roller 19 and the entrance of the platen feed belt 20. They are brought to the hospital and made to wait. During this time, since the motor 25 shown in FIG. 3 rotates, the electromagnetic clutch 35 is turned off so that the platen upper feed belt 20 does not rotate. At this time, the rotational speed of the motor 25 is made slower than the rotational speed at which the previous original is fed into the exposure section, thereby ensuring that double feeding of originals can be prevented. This does not reduce copying productivity. The standby position for the next document is determined by the friction feed roller 17 after the second document sensor 12 detects the leading edge of the document.
etc., and this time is determined by the document size information. When the size of the document in the feeding direction is large, the leading edge occupies a position on the side of the pinch feed roller 19,
When it is small, the leading edge occupies a position on the platen upper feeding belt 2o side, so that even if the size of the original in the feeding direction changes, the distance between the trailing edge of the original in the exposure section and the standby position does not change much.

When the exposure lamp 37, etc. reaches the two-dot chain line position or the solid line position, which is the end position of the scan exposure according to the document size, during the n-1 final scan exposure, it continues to light without returning to the -dot chain line position and then stops. do. At the same time, the platen upper feed belt 20, the pinch discharge roller 22, and at least the pinch feed roller 19
is driven, the first document on the platen glass 21 is discharged to the document discharge section 15, and the second document in the standby position is
The first original is brought to the exposure section and stopped in the same way as the first original. Then, the second original is exposed in the same way as the first original, and the specified number of copies of copy paper is ejected to the copy paper ejection tray, and the original is stacked during n - 1 scanning exposures. The third document is also sent from the unit 8 to the standby position. The above steps are repeated until the last document for which the first document sensor 11 detects the absence of a document is brought to the exposure section. While this last original is subjected to n-1 scanning exposures, the next original is not fed into the standby position, and the exposure that has reached the end position of the n-1 final scanning exposures is not performed. The lamp 37 etc. are turned off and return to the solid line position. Then, when n-1 scanning exposures are completed, the platen upper feeding belt 20 and the nipping discharge roller 22 are driven, and the last document is also discharged to the document discharge section 15.

Through the above, n copies of copy paper are obtained for all the documents placed on the document stacking section 8, and when the last copy sheet of the last document is ejected to the copy paper output tray, a series of copying operations is performed. are all completed.

In the copying machine of the present invention, the above-mentioned example is preferable in terms of obtaining the highest copying productivity, but the exposure lamp 37 and the like are not limited to this when copying one copy in automatic document feeding mode. Even if the illumination is not performed at the solid line position or the one-dot chain line position, or in the case of multiple copy copying in automatic document feeding mode, the exposure of all copies is performed by scanning exposure by moving the exposure lamp 37 or the like in the direction of the thick arrow. , the next document may not be fed to the standby position.

〔Effect of the invention〕

The copying machine of the present invention can copy 1 copy in automatic document feeding mode.
When copying, or even when there are multiple copies, the first copy is exposed in the same way as in the circulation type, so it is easy to obtain a high copying speed without increasing the original transport speed. Moreover, since it is a non-circulating type, there are no disadvantages of the circulating type, and the document feeding device is relatively simple.
This has the effect that the original is less likely to be damaged.

[Brief explanation of drawings]

FIG. 1 is an external perspective view showing an example of a copying machine according to the present invention, FIG. 2 is a schematic partial side view showing an example of an automatic document feeder, and FIG.
The figure is a partial perspective view showing an example of a drive mechanism of an automatic document feeder. l... Copy start button 2... Key group 3... Copy number display section 6... Abnormality display section 7... Automatic document feeder 8... Original stacking section lO... Original size Sensors 11 to 14...First to fourth document sensors 15...Document discharge section 17...Friction feeding, reroller 18...Separating and feeding means 21...Platen glass 23...Exposure section stopper 25 ...Motor 20...Platen upper feed belt 22...Pinch discharge roller 24...Feeding device release sensor 29.35...Electromagnetic clutch

Claims (2)

[Claims] (1) In an automatic document feeding copying machine in which a single document in a document stacking section is sent to an exposure section, the exposure section performs exposure for several copies, and then the document is discharged to a document discharge section. When copying one copy or the first copy of multiple copies, the exposure lamp is fixed in position with respect to the original passing through the exposure unit, and when copying multiple copies or the second and subsequent copies of multiple copies. An automatic document feeding copying machine characterized in that the exposure is performed using an exposure lamp that moves while the document is stopped in an exposure section. (2) The exposure is performed using an exposure lamp that is fixed in position when one copy is being copied and the first copy of a plurality of copies, and the exposure lamp is moved when the second and subsequent copies of a plurality of copies are being made. 2. The automatic document feeding copying machine according to claim 1, wherein the fixed position and moving distance of an exposure lamp for performing exposure are changed according to the length of the document in the feeding direction.