JPH0577147U - Paper feeder - Google Patents

Abstract

(57) [Summary] [Purpose] It was made possible to automatically correct even if a document is improperly inserted or if it is skewed or twisted under a relatively simple structure without increasing the number of parts. Provide a highly reliable facsimile device. [Arrangement] A paper feed gear (ADF gear) 33 provided with a rubber roller and a platen gear (scanner platen gear) 30 for reading or printing are provided, and an original is fed from the paper feed rubber roller 50 to the platen rubber roller when the scanner is driven. To be done. The paper feed gear 33 and the reading or printing platen gear 30 can be driven independently of each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sheet feeding device such as a facsimile, a printer, a copier, and a printing machine. More specifically, a document is read or printed from a sheet feeding rubber roller of an ADF (Auto-Document-Feeder) mechanism. This is related to the one that is capable of automatically correcting the inclination / twisted conveyance when feeding to the platen rubber roller of.

[0002]

[Prior 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, so that both functions can be used at the same time. A copy function can be added by doing so.

In such a facsimile apparatus, 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 on a gear shaft, are usually used. , 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, an ADF rubber roller 50 is fixedly fitted onto the gear shaft 33a of the ADF gear, and a plate-shaped rubber 52 is tilted slightly upward with respect to the carrying-in side of the document P so as to contact the lower side of the ADF rubber roller 50. It is arranged in the opened state. In the vicinity of the ADF rubber roller 50 and the plate-shaped rubber 52, a guide member 54 for guiding a plurality of documents P is provided, and a plate spring 56 for pressing the document P against the ADF rubber roller 50 is provided. There is.

Here, the plurality of originals P that are guided and inserted by the guide member 54 are pressed toward the axis of the ADF rubber roller 50 by the leaf spring 56, and their lower ends are moved to the plate-shaped gum 52. They are aligned diagonally along. When the ADF rubber roller 50 is rotationally driven in the direction of the arrow (counterclockwise) in this state, the ADF rubber roller 50 and the plate rubber 52 are sequentially arranged from the one located on the ADF rubber roller 50 side of the plurality of originals P. It is drawn in between and discharged in the direction indicated 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 substantially forward, which is the tangential direction of the plate-shaped rubber 52 to the ADF rubber roller 50.

The document P discharged from the ADF rubber roller 50 is guided by a guide roller or the like, which is provided as necessary, and guided to the scanner rubber roller. Scanning processing is performed. 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]

[Problems to be solved by the device]

 In the ADF mechanism as described above, the document is inserted with the document tilted or the tip is not aligned, or the pressing force and frictional force of the ADF rubber roller, the plate-shaped rubber, and the plate spring on the inserted document are not uniform. As a result, the entire document often tilts or twists (skew) with respect to the discharge direction.

When such a defective document insertion or skew / twisted conveyance occurs, the document is inserted with respect to the scanner gom roller while being skewed / twisted, which causes a paper jam or a scanning failure (transmission failure). It tends to occur and the reliability of the product is impaired.

In view of the above point, the present invention is capable of automatically correcting even if a document is improperly inserted or if the document is skewed or twisted under a relatively simple configuration without increasing the number of parts. It is an object of the present invention to provide a facsimile machine having high reliability.

[0011]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a facsimile apparatus according to the present invention includes a paper feed gear provided with a rubber roller and a platen gear for reading or printing, and feeds an original document from the paper feed rubber roller to the platen rubber roller. In the thus configured sheet feeding device, the sheet feeding gear and the platen gear can be driven independently of each other.

[0012]

[Action]

 In the paper feeding device according to the present invention configured as described above, 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.

As a result, the leading edge of the document discharged from the paper feeding rubber roller is not drawn into the platen rubber roller even when it reaches the platen rubber roller, and remains in contact with the scanner rubber roller until the irregular documents are aligned. You're waiting.

Therefore, even if the original is inserted with the tip inclined or misaligned, or when the entire original is inclined or twisted with respect to the ejection direction when ejected from the rubber roller for paper feeding, It is automatically corrected before it is drawn into the platen rubber roller, and then it is drawn into the proper position by rotating the platen rubber roller.

Further, since the number of rotations (paper feed speed) of the feeding rubber roller and the platen rubber roller can be set independently of that of the other, the speed is higher than that of the conventional type in which they are interlocked. Thus, it is possible to rotate the document at a high speed, and as a result, it is possible to increase the carrying-in speed of the original document 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 ejecting it, so that the document can be aligned. Since the function of pushing or pressing against the rubber roller is not always necessary, it is possible to reduce parts such as leaf springs and simplify the mechanism.

[0017]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 respectively show a main part of a drive system of a facsimile apparatus which is an example of 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). ADF gear drive state of FIG. 3, 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. The simultaneous drive status (copy status) is shown.

[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 through the small-diameter gear 13 coaxial with the reduction gear 12. 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 spectacle-shaped opening 18 into which the shaft 17 is inserted. The first clutch plate 15 is swingably supported by the shaft 17. The first clutch means provided with the pin 16 that is erected on the first clutch plate 15 and pivotally supports the first clutch gear 19 is movable along the rotation direction of the reduction gear 12. , The first operating state in which it meshes with the ADF gear 33 via the idle gears 31 and 32 (FIG. 2), and the second operating state in which it meshes with the head platen gear 35 for the printer (FIG. 4), and the idle gear 31. And a non-operating state in which the head platen gear 35 is disengaged.

On the other hand, the second clutch gear 29 has a second solenoid 24 and a spectacle-shaped opening portion 28 into which the shaft 27 is inserted, and the second clutch gear 29 is swingably supported by the shaft 27. Moved along the rotational direction of the reduction gear 12 by the second clutch means provided with the clutch plate 25 and the pin 26 that is planted on the second clutch plate 25 and pivotally supports the second clutch gear 29. This is made possible by selectively setting an operating state in which the scanner platen gear 30 for the scanner is engaged (FIG. 3) and a non-operating state in which the scanner platen gear 30 is disengaged.

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. ing.

Although the scanner platen gear 30 and the idle gear 31 seem to mesh with each other in the drawing, in reality, they only seem to overlap with each other from the front side 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.

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

In the ADF mechanism having such a configuration, 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. ing. A plurality of originals P are aligned by abutting the leading ends thereof on the outer surface of the ADF rubber roller 50 between the ADF rubber roller 50 and the separation rubber 60, and the ADF rubber roller 50 is sequentially rotated from the upper side by the rotation of the ADF rubber roller 50. And the separation rubber 60, and is discharged in the direction indicated by the alternate long and short dash line in the figure.

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 document P is reliably pulled in and stably conveyed, and the document P is also fed into the ADF mechanism. The leaf spring 56 (FIG. 7) or the like which is conventionally required for pressing the rubber roller 50 is not required, 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 14 and 24 are deenergized and the first and second solenoids 14 and 24 are deenergized. The first clutch gear 19 and the second clutch gear 29 are both disengaged from the idle gear 31, the head platen gear 35, and the scanner platen gear 30.

[Scanner Driving State]: FIGS. 2 and 3 The scanner driving state is as shown in FIG. 2 by selectively activating the first clutch gear 19 and the second clutch gear 29 by a control means (not shown). The drive state of the ADF gear 33 as shown and the drive state of the scanner platen gear 30 as shown in FIG. 3 are performed in two stages.

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. At the same time, the first solenoid 14 is excited and the shaft 17 is once removed from the opening 18. As a result, the first clutch plate 15 is released, moves in the rotation direction of the reduction gear 12 as shown in FIG. 2, the first clutch gear 19 meshes with the idle gear 31, and the rotation is idle. It is transmitted to the ADF gear 33 via the gear 32. 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 17 of the first solenoid 14 is returned to its original state.

At this time, the second clutch gear 29 does not move in the rotation direction of the reduction gear 12 even if the reduction gear 12 rotates because the second clutch means is in the non-operating state.

In such a state, the transmission document P is separated 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 drawn in between 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 in a stopped state, the leading edge of the document P discharged from the ADF rubber roller 50 is not drawn into the scanner rubber roller even when it reaches the scanner rubber roller. Remains in contact with. In this state, the ADF rubber roller 50 and the separation rubber 60 slide or idle due to the rigidity of the original P. Further, since the ADF rubber roller 50 continues to rotate for a predetermined time, when the original P is tilted. By the rotation after the contact, the leading edge of the document P is gradually aligned with the scanner platen gear 30. The ADF rubber roller 50 idles for a while after the originals P are gathered.

In this way, after one sheet of original P comes into contact with the scanner platen gear 30 and is aligned, as a second step, the second solenoid 24 is energized and the reduction gear 12 is moved to the above-described first stage. When the clutch plate 15 is rotated in the direction opposite to the step, the clutch plate 15 rotates in the same direction as the reduction gear 12, so that the rotation of the ADF gear 33 is stopped and the first opening 18 is formed in the opening 18 formed in the clutch plate 15. The shaft 17 of the solenoid 14 is automatically inserted, the clutch plate 15 is fixed, the second clutch plate 25 is opened, and the second gear plate is moved in the rotation direction of the reduction gear 12 as shown in FIG. Clutch gear 29 meshes with the scanner platen gear 30, and the scanner platen gear 30 is rotated.

As a result, the original 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 drawing of the document by the scanner rubber roller and rotates without applying a load.

By doing so, the document P is inserted while being inclined or the ends are not aligned, and the entire document is inclined or twisted with respect to the ejection direction when ejected from the ADF rubber roller 50. Is also automatically corrected in the standby state before it is pulled into the scanner rubber roller, is pulled into the scanner rubber roller in a proper posture, and the ADF rubber roller 50 and the scanner rubber roller are independently rotated. Documents are reliably fed to the scanner rubber roller one by one. Then, the next original document is continuously fed by repeating the above operation.

Further, the ADF gear 33 and the scanner platen gear 30 can set the number of rotations (paper feed speed) independently of the other, and therefore, 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 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 tilt / twisted conveyance, the ADF mechanism only needs to have a function of reliably pulling in a document and stably ejecting it, so that the document can be aligned. Since the function of pushing or pressing against the rubber roller is not always necessary, it is possible to reduce parts such as leaf springs and simplify the mechanism.

[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 solenoid 14 is energized, and the shaft 17 is once removed from the opening 18. As a result, the clutch plate 15 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 again. The clutch 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, the second clutch gear 29 does not move in the rotation direction of the reduction gear 12 even if the reduction gear 12 rotates because the second clutch means is in the inoperative state.

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

When the reception is completed in this way, the solenoid 14 is de-energized, 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 again, 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. While being transmitted to the gear 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 rotated in the rotational direction of the reduction gear 12 as shown in FIG. And the first and second clutch gears 19 and 29 mesh with the head platen gear 35 and the scanner platen gear 30, respectively.

As a result, the scanner operation and the printer operation are performed at the same time, and the documents are copied.

In the facsimile apparatus of the present example having the above-described configuration, the printer is driven by switching the operating state of the first solenoid means and the second solenoid means using the single motor 10 as the driving source. Since the status and / or the scanner driving status 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 significantly reduced.

The paper feeding device according to the present invention does not necessarily need to share a motor for driving the printer and the motor for driving the scanner as described above, and is also applicable to a conventional device having a motor for each. In addition to the facsimile machine, the invention can be applied to printers, copy machines, printing machines, and the like.

[0048]

[Effect of the device]

 As is clear from the above description, in the paper feeding device according to the present invention, the paper feeding rubber roller and the platen rubber roller can be independently driven, so that the paper feeding rubber roller is rotated for a predetermined time and then rotated. When the platen rubber roller reaches the platen rubber roller, the leading edge of the original that was ejected from the paper feeding rubber roller is not drawn into the platen rubber roller but abuts on the platen rubber roller. You will be waiting as it is. Therefore, even if a document is inserted with its tip tilted or misaligned, or if the entire document is tilted or twisted with respect to the ejection direction when ejected from the paper feed rubber roller, it will be It is automatically corrected before it is retracted, and then it is retracted into the proper position by rotating the platen rubber roller. As a result, 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 feed rubber roller and the platen rubber roller can be set independently of that of the other, so they rotate at a higher speed than the conventional type that links them. As a result, it is possible to increase the carrying-in speed and the like of the document and set it freely. Furthermore, since it has a function to automatically correct defective insertion and skewed / twisted conveyance, the ADF mechanism only needs to have the function of reliably pulling in the originals and stably ejecting them, and aligning the originals and rubber rollers. Since the function of pressing against is not always necessary, parts such as leaf springs can be reduced and the mechanism can be simplified.

[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 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)

[Scope of utility model registration request] 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. A sheet feeding device, characterized in that the gear for gear and the platen gear can be driven independently of each other.