JPH05278879A - Driving control method of paper sheet feeding device - Google Patents

Abstract

PURPOSE:To improve the reliability of the paper sheet feeding by constituting so that a rubber roller for paper sheet feeding and a platen rubber roller may be independently driven, and executing the automatic adjustment before a document is pulled into the platen roller when the document is inserted in the inclined condition or the like. CONSTITUTION:In a facsimile device, a transmitting document (P) is pulled into the space between a rubber roller 50 and a separating rubber 60, and discharged toward a scanner rubber roller provided to a gear shaft of a scanner platen gear 30, while the scanner platen gear 30 is in the stopped condition, and the tip of the transmitting document (P) is remained to be bought into contact with the scanner rubber roller even when a document reaches the scanner rubber roller. Since the rubber roller 50 and the separating rubber 60 slip due to the rigidity of the document (P) and continue the idle operation, the tip of the document (P) is gradually put into order when the document (P) is inclined. Then, a solenoid 24 is excited, and a reduction gear 12 is rotated in the reverse direction, and the scanner platen gear 30 is rotated and the document (P) is carried forward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control method for a sheet feeding device such as a facsimile, a printer, a copier, and a printing machine. More specifically, the document is ADF (Auto-Do).
The present invention relates to an apparatus capable of automatically correcting tilting / twisting conveyance when feeding from a feeding rubber roller of a document-feeder mechanism to a reading or printing platen gear.

[0002]

2. Description of the Related Art As an example of a conventional example, a facsimile apparatus generally has both a scanner function for reading a document to be transmitted and a printer function for printing a received document, and therefore both functions are provided. A copy function can be added by making them available at the same time.

In such a facsimile machine, a paper feed gear (hereinafter referred to as an ADF gear), a reading or printing gear (hereinafter referred to as a scanner platen gear), each of which is provided with a rubber roller, is usually provided on a gear shaft. And a head platen gear, of which the ADF gear and the scanner platen gear are located on the same gear train.

Therefore, when the scanner is driven (during transmission or copy operation), the ADF gear and the scanner platen gear are driven in conjunction with each other, and the originals are drawn one by one into the ADF rubber roller and fed to the scanner rubber roller. It is supposed to be done.

By the way, the ADF mechanism of the sheet feeding device in the facsimile apparatus is similar to the cut sheet feeder in the printer, and a typical example thereof is shown in FIG. In FIG. 7, the ADF is attached to the gear shaft 33a of the ADF gear.
The rubber roller 50 is fixedly fitted to the outside, and the plate-shaped rubber 52 is attached to the lower side of the ADF rubber roller 50 so as to circumscribe it.
Are arranged with the carry-in side of the document P slightly inclined upward. A guide member 54 for guiding a plurality of originals P is provided near the ADF rubber roller 50 and the plate-shaped rubber 52, and a plate spring 56 for pressing the original P against the ADF rubber roller 50 is provided.

Here, the plurality of documents P guided and inserted by the guide member 54 are pressed toward the axis of the ADF rubber roller 50 by the plate spring 56, and their lower ends are along the plate rubber 52. Can be arranged diagonally. In this state, when the ADF rubber roller 50 is rotationally driven in the direction of the arrow (counterclockwise) in the figure, the ADF rubber roller 5 of the plurality of originals P is sequentially positioned from the ADF rubber roller 50 side.
It is drawn between 0 and the plate-shaped rubber 52, and is discharged in the direction shown by the alternate long and short dash line in the figure. In this case, the insertion direction of the document P is diagonally downward, while the ejection direction is AD.
It is substantially in the tangential direction of the plate-shaped rubber 52 with respect to the F rubber roller 50.

The document P discharged from the ADF rubber roller 50 is guided by a guide roller or the like provided as necessary, guided to the scanner rubber roller, and while being discharged from the ADF rubber roller 50, the leading end side is pulled into the scanner rubber roller and scanned. Processing is performed. It should be noted that the above ADF mechanism is shown by simplifying only the main parts, and in reality, it is more complicated and many parts are used.

[0008]

In the ADF mechanism as described above, the document is inserted while the document is tilted or the leading end is not aligned, or the ADF for the inserted document is used.
The entire original document is often inclined or twisted (skewed) with respect to the discharge direction due to uneven pressing force and frictional force of the rubber roller, the plate-shaped rubber, and the plate spring.

When such a document is improperly inserted or inclined / twisted and conveyed, the document is inserted into the scanner rubber roller while being inclined / twisted, which causes a paper jam or a scanning defect (transmission defect). It tends to occur and the reliability of the product is impaired.

In view of such a point, the present invention is capable of automatically correcting even if a document is improperly inserted or tilted / twisted under a relatively simple structure without increasing the number of parts. It is an object of the present invention to provide a reliable drive control method for a sheet feeding device.

[0011]

In order to achieve the above object, a drive control method for a sheet feeding device according to the present invention comprises a sheet feeding gear provided with a rubber roller and a platen gear for reading or printing. In a paper feeding device configured to feed an original from a paper feeding rubber roller to a platen rubber roller, the original is fed from the paper feeding rubber roller to the platen rubber roller by driving the paper feeding gear, and the leading end of the original is fed to the platen rubber roller. After contacting the paper feed gear, the paper feed gear is rotated at least a few more times, and then the platen gear is rotated and the paper feed gear is stopped so that the paper feed gear and the platen gear are independent of each other. It is characterized in that it can be driven to.

[0012]

In the drive control method of the paper feeding apparatus according to the present invention having the above-described structure, the paper feeding rubber roller and the platen rubber roller can be independently driven individually. Therefore, it is possible to rotate only the paper feeding rubber roller and stop the rotation of the platen rubber roller, and conversely, rotate only the platen rubber roller and stop the paper feeding rubber roller. After the leading edge of the original sent from the rubber roller for paper comes into contact with the platen rubber roller, the paper feeding gear is further rotated at least several times, and then the platen gear is rotated and the paper feeding gear is stopped.

As a result, the leading edge of the original discharged from the paper feeding rubber roller is not drawn into the platen rubber roller even when it reaches the platen rubber roller, and waits in contact with the scanner rubber roller until the irregular originals are aligned. It will be.

Therefore, even if the original is inserted with the tip inclined or is not aligned, or the entire original is inclined or twisted with respect to the ejecting direction when ejected from the rubber roller for feeding, it is caused by the platen. It is automatically corrected before being pulled in by the rubber roller, and then the platen rubber roller is rotated so that it is pulled in in a proper posture, and the feeding rubber roller and the platen rubber roller are individually driven and controlled. Synergistically, the continuously fed originals are surely fed one by one, and the succeeding originals are also continuously fed.

Further, since the number of rotations (paper feed speed) of the paper feeding rubber roller and the platen rubber roller can be set independently of the other, the speed is higher than that of the conventional type in which they are interlocked. It becomes possible to rotate the document, and as a result, it is possible to increase the carrying-in speed of the document and the like, and to freely set it.

Further, since it has a function of automatically correcting defective insertion and inclination / twisted conveyance, the ADF mechanism only needs to have a function of reliably pulling in a document and stably discharging it, so that the document can be aligned. Since the function of pushing or pressing against the rubber roller is not always necessary, the number of parts such as leaf springs can be reduced and the mechanism can be simplified.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show main parts of a drive system of a facsimile apparatus which is an example of a drive control method for a sheet feeding device according to the present invention. FIG. 1 shows a stopped state, and FIG. 2 shows a scanner drive state (transmission state). 3) shows the ADF gear drive state, FIG. 3 shows the scanner platen gear drive state of the scanner drive state (transmission state), FIG. 4 shows the printer drive state (reception state), and FIG. It shows a simultaneous drive state (copy state) of the printers.

[Structure and Stopped State]: FIG. 1 In this example, the rotational driving force of the motor 10 is transmitted from the pinion gear 11 to the large-diameter reduction gear 12, and is transmitted through the small-diameter gear 13 coaxial with the reduction gear 12 to the first gear. It is transmitted to the first clutch gear 19 and the second clutch gear 29. The first clutch gear 19 has a first solenoid 14 and a first clutch plate 15 having an eyeglass-shaped opening 18 into which the shaft 17 is inserted and swingably supported by the shaft 17. The first clutch means is provided on the first clutch plate 15 and is provided with a pin 16 that pivotally supports the first clutch gear 19. The first clutch means enables movement along the rotation direction of the reduction gear 12 and idles. The first operating state in which the ADF gear 33 is engaged via the gears 31 and 32 (FIG. 2), the second operating state in which the head platen gear 35 for the printer is engaged (FIG. 4), the idle gear 31 and the head platen. The non-operating state in which the gear 35 is disengaged is selectively set.

On the other hand, the second clutch gear 29 has a second solenoid 24 and an eyeglass-shaped opening portion 28 into which the shaft 27 is inserted, and a second clutch gear 29 is swingably supported by the shaft 27. The clutch plate 25 and the second clutch gear 2 installed on the second clutch plate 25.
The second clutch means having a pin 26 that pivotally supports 9 is movable along the rotation direction of the reduction gear 12,
The operating state in which the scanner platen gear 30 for the scanner is engaged (FIG. 3) and the non-operating state in which the scanner platen gear 30 is disengaged are selectively set.

Therefore, the ADF gear 33 and the scanner platen gear 30 can be independently driven individually by selectively operating the first clutch means and the second clutch means. There is.

Although the scanner platen gear 30 and the idle gear 31 appear to mesh with each other in the drawing, they actually appear to overlap with each other from the front and are not in contact with each other. Therefore, the rotation of the scanner platen gear 30 is not transmitted to the idle gear 31.

Further, in this example, the ADF mechanism is constructed as shown in FIG. In FIG. 6, an ADF rubber roller 50 similar to that of the conventional one (FIG. 7) is firmly fitted onto the gear shaft 33a of the ADF gear 33 (see FIG. 1), and the rubber separation rubber 6 is attached to the ADF rubber roller 50.
0 is circumscribed. The separation rubber 60 has a flat plate shape on the original insertion side, but has an AD side on the original discharge side.
The F rubber roller 50 is curved to have a circular cross section along the outer peripheral surface thereof, and the entire curved portion is pressed against the outer peripheral surface of the ADF rubber roller 50.

In the ADF mechanism having such a structure,
The leaf spring 56 (FIG. 7) which has been conventionally required for pressing the document P against the ADF rubber roller 50 is not required, and the number of parts is greatly reduced. A plurality of manuscripts P have their leading ends A between the ADF rubber roller 50 and the separating rubber 60.
The DF rubber roller 50 is brought into contact with and aligned with the outer surface of the DF rubber roller 50. When the ADF rubber roller 50 rotates, the ADF rubber roller 50 is sequentially drawn between the ADF rubber roller 50 and the separation rubber 60 from the upper side and discharged in the direction shown by the dashed line in the figure. It

In such an ADF mechanism, since the contact area between the ADF rubber roller 50 and the separating rubber 60 is larger than that of the conventional one, the original P is reliably pulled in and stably conveyed, and the original P is also fed into the ADF mechanism. A leaf spring 56 (FIG. 7) that was conventionally required to press against the rubber roller 50.
Etc. are unnecessary and the number of parts is greatly reduced.

In the drive system having the above-mentioned structure, when the facsimile apparatus is stopped,
As shown in FIG. 1, the first and second solenoids 1
4, 24 are de-energized, and the first clutch gear 19
And the second clutch gear 29 are both idle gears 31,
Head platen gear 35 and scanner platen gear 30
Have left.

[Scanner Driving State]: FIG. 2 and FIG. 3 The scanner driving state is the first by the control means (not shown).
By selectively operating the clutch gear 19 and the second clutch gear 29 of FIG.
This is performed in two stages, that is, the driving state of the F gear 33 and the driving state of the scanner platen gear 30 as shown in FIG.

First, in the first stage, as shown in FIG. 2, the rotational driving force of the motor 10 is transmitted from the pinion gear 11 to the first clutch gear 19 via the reduction gear 12 and the small diameter gear 13, and The first solenoid 14 is excited and the shaft 17 is once removed from the opening 18. Thereby, the first clutch plate 15
2, the first clutch gear 19 meshes with the idle gear 31 by moving in the rotation direction of the reduction gear 12 as shown in FIG.
It is transmitted to the DF gear 33. Note that, after the first clutch gear 19 meshes with the idle gear 31, the first solenoid 14 is deenergized.

At this time, after the first clutch gear 19 comes into contact with the idle gear 31, the first solenoid 14 is de-energized and the shaft 1 of the first solenoid 14 is re-energized.
Return 7 to the original.

At this time, in the second clutch gear 29, the second clutch means is in the non-operating state, so the reduction gear 1
Even if 2 rotates, it does not move in the rotation direction of the reduction gear 12.

In such a state, the transmission document P is placed between the ADF rubber roller 50 and the separation rubber 60 by the ADF mechanism provided around the gear shaft 33a of the ADF gear 33 as shown in FIG. It is pulled in and discharged toward the scanner rubber roller (not shown) provided on the gear shaft of the scanner platen gear 30.

However, at this time, since the scanner platen gear 30 is stopped, the ADF
Even if the leading edge of the document P discharged from the rubber roller 50 reaches the scanner rubber roller, it is not drawn into the scanner rubber roller, but remains in contact with the scanner rubber roller. In this state, the ADF rubber roller 50 and the separation rubber 60 are slid, that is, idle rotation due to the rigidity of the document P.
Further, since the ADF rubber roller 50 continues to rotate for a predetermined time, when the document P is tilted, the leading edge of the document P is gradually aligned with the scanner platen gear 30 by the rotation after the contact. The ADF rubber roller 50 idles for a while after the documents P are gathered.

In this way, after the one original P is brought into contact with the scanner platen gear 30 and aligned, the second step is to energize the second solenoid 24 and the reduction gear 12 to the first step. When it is rotated in the opposite direction, the clutch plate 15 rotates in the same direction as the reduction gear 12,
Therefore, the rotation of the ADF gear 33 is stopped, the shaft 17 of the first solenoid 14 is automatically inserted into the opening 18 formed in the clutch plate 15, the clutch plate 15 is fixed, and the second clutch plate 25 is released and the reduction gear 1 as shown in FIG.
The second clutch gear 29 meshes with the scanner platen gear 30 by moving in the second rotation direction, and the scanner platen gear 30 is rotated.

As a result, the document P that has been waiting is drawn into the scanner rubber roller, passed through the scanner head S portion, and transmitted. At this time, since the ADF rubber roller 50 is released from the first clutch gear 19 and is in a freely rotating state, the ADF rubber roller 50 follows the pulling of the document by the scanner rubber roller and rotates without applying a load.

By doing so, the original P is inserted with the inclination or the leading end being uneven,
Even if the entire document is inclined or twisted with respect to the ejection direction when ejected from the ADF rubber roller 50, it is automatically corrected in the standby state before being pulled in by the scanner rubber roller and the scanner rubber roller is placed in a proper posture. Documents that are pulled in and fed in synergy with the fact that the ADF rubber roller 50 and the scanner rubber roller are independently driven to rotate independently are reliably fed one by one to the scanner rubber roller. Subsequently, the above-described operation is repeated for the next original document, and the paper feeding operation is continuously performed.

Further, since the ADF gear 33 and the scanner platen gear 30 can be set in the number of revolutions (paper feed speed) independently of the other, compared to the conventional type in which they are interlocked. It is possible to rotate the document at a high speed, and as a result, it is possible to increase the document carrying-in speed and the like, and to freely set it.

Further, since it has a function of automatically correcting defective insertion and skew / twisted conveyance, the ADF mechanism only needs to have a function of reliably pulling in and stably ejecting the original, and the originals are aligned. Since the function of pushing or pressing against the rubber roller is not always necessary, the number of parts such as leaf springs can be reduced and the mechanism can be simplified.

[Printer Driving State]: FIG. 4 At this time, the rotational driving force of the motor 10 is transmitted from the pinion gear 11 to the first clutch gear 19 via the reduction gear 12 and the small diameter gear 13, and at the same time the first solenoid is operated. 14 is energized and the shaft 17 is opened 18
Is once removed from. Thereby, the clutch plate 1
5 is released, the clutch plate 15 moves in the rotation direction of the reduction gear 12 as shown in FIG. 4, and the first clutch gear 19 meshes with the head platen gear 35.

At this time, after the first clutch gear 19 comes into contact with the head platen gear 35, the first solenoid 14 is deenergized again, and the shaft 17 of the first solenoid is returned to the original state to return to the first clutch. The plate 15 is fixed to prevent the first clutch gear 19 from escaping due to high torque and vibration of the head platen gear 350.

At this time, in the second clutch gear 29, the second clutch means is in the non-operating state, so the reduction gear 1
Even if 2 rotates, it does not move in the rotation direction of the reduction gear 12.

In this state, the thermal paper K is led out by the head platen gear 35.

When reception is completed in this way, the solenoid 14 is de-energized and the shaft 17 moves,
The first clutch plate 15 is released, and the reduction gear 12
Is rotated counterclockwise, the first clutch gear 19 is returned to the stopped position, the shaft 17 of the first solenoid 14 is returned to the original position, and the first clutch plate 15 is fixed. ..

[Simultaneous Driving State of Scanner and Printer]: FIG. 5 At this time, the rotational driving force of the motor 10 is transmitted from the pinion gear 11 through the reduction gear 12 and the small diameter gear 13 to the first clutch gear 19 and the second clutch gear. While being transmitted to 29, the first and second solenoids 14 and 24 are energized, and the shafts 17 and 27 are once removed from the openings 18 and 28, respectively.

As a result, the first and second clutch plates 15 and 25 are released, and the first and second clutch plates 15 and 25 are respectively shown in FIG.
The first and second clutch gears 19 and 29 move in the rotation direction of the reduction gear 12 so that the head platen gear 3 respectively.
5, meshes with the scanner platen gear 30.

As a result, the scanner operation and the printer operation are simultaneously performed, and the originals are copied.

As described above, in the facsimile apparatus according to the embodiment of the present invention, the printer is driven by switching the operating states of the first solenoid means and the second solenoid means using the single motor 10 as the driving source. Since the state and / or the scanner driving state are selectively obtained, the size can be reduced as compared with the conventional one having separate motors for driving the printer and separately for driving the scanner.

Further, since only one motor is required, not only the cost of the motor but also the number of control parts can be reduced, so that the cost can be greatly reduced.

In the drive control method of the sheet feeding device according to the present invention, it is not always necessary to share the motor for driving the printer and the motor for driving the scanner as described above. Is also applicable, and
It can be applied to printers, copiers, printing machines, etc., in addition to facsimile machines.

[0048]

As is apparent from the above description, in the drive control method of the paper feeding device according to the present invention, the paper feeding rubber roller and the platen rubber roller can be driven independently of each other. After the leading edge of the fed original comes into contact with the platen rubber roller, the paper feeding gear is further rotated at least several times, and then the platen gear is rotated and the paper feeding gear is stopped. Even if the leading edge of the document discharged from the paper feeding rubber roller reaches the platen rubber roller, the leading edge of the document is not drawn into the platen rubber roller, and is in contact with the platen rubber roller and stands by. Therefore, even if the original is inserted with the tip tilted or misaligned, or when the entire original is tilted or twisted with respect to the ejection direction when ejected from the rubber roller for feeding, it is pulled into the platen rubber roller. It is automatically corrected before being loaded, and after that, the platen rubber roller is rotated to pull it in in a proper posture, and the feeding rubber roller and the platen rubber roller are individually driven and controlled. Then, the continuously fed originals are surely fed one by one, and the succeeding originals are similarly continuously fed. Therefore, paper jams and poor transmission are less likely to occur, and reliability is improved. Also, the number of rotations (paper feed speed) of the paper feeding rubber roller and the platen rubber roller can be set independently of the other, so rotate at a higher speed than the conventional type that links them. As a result, it is possible to speed up the carrying-in speed and the like of the document and set it freely. Further, since it has a function of automatically correcting defective insertion and skewed / twisted conveyance, the ADF mechanism only needs to have a function of reliably pulling in a document and stably discharging it.
Since the functions of aligning the originals and pressing them against the rubber roller are not always necessary, it is possible to reduce parts such as leaf springs and simplify the mechanism.

[Brief description of drawings]

FIG. 1 is a diagram provided for explaining a configuration and a stopped state of a facsimile apparatus which is an embodiment of a drive control method for a sheet feeding apparatus of the present invention.

FIG. 2 is a diagram provided for explaining a scanner driving state of FIG.

FIG. 3 is a diagram provided for explaining a scanner driving state of FIG.

FIG. 4 is a diagram provided for explaining a printer driving state of FIG.

5 is a diagram provided for explaining a simultaneous driving state of the scanner and the printer of FIG.

6 is a diagram showing the ADF mechanism of FIG. 1. FIG.

FIG. 7 is a diagram showing an ADF mechanism of a facsimile device which is an example of a conventional paper feeding device.

[Explanation of symbols]

10 Motor 11 Pinion Gear 12 Reduction Gear 13 Small Diameter Gear 14,24 Solenoid 15,25 Clutch Plate 19,29 Clutch Gear 30 Scanner Platen Gear (Reading or Printing Platen Gear) 31,32 Idle Gear 33 ADF Gear (Feeding Gear) 33a Gear shaft 35 Head platen gear 50 ADF rubber roller (paper feeding rubber roller) 60 Separation rubber

Claims (1)

[Claims] 1. A paper feeding apparatus, comprising a paper feeding gear provided with a rubber roller and a platen gear for reading or printing, for feeding an original from the paper feeding rubber roller to the platen rubber roller. Drive the gear for feeding the document from the paper feeding rubber roller to the platen rubber roller, and after the tip of the original comes into contact with the platen rubber roller, further rotate the paper feeding gear at least several times,
After that, the platen gear is rotated and the paper feeding gear is controlled to be in a freely rotating state so that the paper feeding gear and the platen gear can be driven independently of each other. Drive control method for paper apparatus.