KR100950530B1 - Auto document feeding apparatus and method for removing jam document bidirectionally - Google Patents

Abstract

An automatic document feeder and a bidirectional jam document removal method are disclosed.

The disclosed automatic document conveying apparatus includes a feed roller; Feeding rollers; Discharge roller; A motor for driving the feed roller, feeding roller and discharge roller; A first gear train transferring power of the motor to a supply roller; A second gear train that transfers power of the motor to a feeding roller; A third gear train that transfers power of the motor to a discharge roller; A first power changer installed between the first gear train and the second gear train or between the first gear train and the third gear train so as to switch power by a swing motion; And a second power changer installed in the second gear train or the third gear train so as to switch power by a swing motion.

According to the above configuration, in the present invention, jams can be easily removed when jams occur during document transfer.

Description

Automatic document feeding apparatus and method for removing jam document bidirectionally}

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the conventional document conveyance apparatus and the jam original removal method.

2A and 2B show a document conveying apparatus according to a first embodiment of the present invention.

3 is a modification of the document conveying apparatus according to the first embodiment of the present invention.

4 shows a document conveying apparatus according to a second embodiment of the present invention.

5 shows a document conveying apparatus according to a third embodiment of the present invention.

6 is a block diagram illustrating a jam manuscript removal method according to a preferred embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

100,120,140,147,171,172 ... gear, 105,155,170 ... feed roller

110,150 ... pick-up roller, 115,160,180 ... feeding roller

127,165,190 ... badge roller,

102,121,133,141,161,185 ... power changer

S1, S2, S3 ... sensor

The present invention relates to an automatic document feeder employed in a multifunction device and a method for removing jam originals from the same, and more particularly, a jam original in both directions of the original feed direction and the opposite direction of the original feed using a swing drive power switch. It relates to an automatic document feeder that can be removed and a method for removing jam originals.

In general, a multifunction device is an electronic device that is capable of performing a combination of printer, facsimile, scanner, and copier functions. This multifunction machine includes an Auto Document Feeder which is capable of automatically feeding a plurality of originals placed on a paper tray.

1 schematically shows an automatic paper conveying apparatus employed in a conventional multifunction apparatus.

The automatic sheet conveying apparatus is configured to transmit power in three directions from the motor 10 via the first gear 13. That is, power is transmitted to the second gear 15, the third gear 25, and the fourth gear 30 through the first gear 13.

First, the feed roller 17 and the pick-up roller 22 are rotated by the power transmitted from the first gear 13 to the second gear 15 to pick up the original and to feed the feeding roller 27. . In addition, the feeding roller 27 is rotated by the power transmitted from the first gear 13 to the third gear 25 to convey the document to the discharge roller 37.                         

Next, the power transmitted from the first gear 13 to the third gear 30 is transmitted to the discharge roller 37 through the fourth gear 35 to discharge the original. A first idle gear 20 is provided between the feed roller 17 and the pickup roller 22, and a second idle gear 33 is provided between the third gear 30 and the fourth gear 35.

In addition, first to fourth clutches 1, 2, 3, and 4 are installed on the pickup roller 22, the supply roller 17, the third gear 25, and the discharge roller 37, respectively, so that power transmission may be performed. It is supposed to be cracked down.

The document is discharged by the discharge roller 37 through the pickup roller 22, the feed roller 17, and the feed roller 27, and the document conveying operation is performed by the first sensor S1 for detecting the presence of the document, The acceleration / deceleration and the forward and reverse rotation of the motor 10 are controlled by the second sensor S2 for registration and the third sensor S3 for scanning.

When the motor 10 is driven in the counterclockwise direction (CCW), the feed roller 17 and the pickup roller 22 is rotated in the clockwise direction (CW) by the gear train (train) so that the original is the second sensor (S2) Are conveyed up to). At this time, since the feeding roller 27 and the discharge roller 37 are interrupted by the third and fourth clutches 3 and 4, they are not rotated.

When the document tip passes through the second sensor S2, the rotation speed of the motor 10 is reduced, and the feeding roller 27 is not rotated until the motor 10 is rotated clockwise CW again. In the meantime, the originals are aligned with the feeding rollers 27 to realize the registration function of the paper.

Next, when the motor 10 rotates in the counterclockwise direction (CCW), the intermittence of the third clutch 3 is released and the feeding roller 27 is rotated, so that the original is advanced by the feeding roller 27. . At this time, the feed roller 17 is interrupted by the operation of the second clutch 2 so as not to rotate, and only the feeding roller 27 and the discharge roller 37 are rotated in the clockwise direction CW.

When the rear end of the document completely exits the discharge roller 37, the above process is repeated.

By the way, there is a case that jam occurs when the document is jammed in the device during the document transfer process. If a jam occurs, the scanning operation is difficult to perform normally.

Therefore, when jam occurs, it is necessary to remove the jam paper and then continue scanning. Depending on the device, the jam is automatically removed or the user manually clears the jam.

However, in the structure as shown in FIG. 1, the clutches 1, 2, 3, and 4 are all released in the original feed direction only, and the original is pulled toward the discharge roller 37 to remove the jam. must do it.

When jam occurs due to the jammed document between the feeding roller 27 and the discharge roller 37, the user can pull the document by hand to remove the jam. However, when the document leading edge is caught in the section between the pickup roller 22 and the feeding roller 27, it is difficult to remove the paper because the leading edge of the paper is not visible to the user.

In order to compensate for this, a jam removing gear 40 is separately provided between the peeled roller 27 and the discharge roller 37. When the jam occurs when the user rotates the jam removal gear 40 by hand, the gears are rotated, so that the rollers coaxially connected with the gears are rotated so that the document is conveyed toward the feeding roller 27. Then, when the leading edge of the paper is visible, the user pulls out the paper to remove the jam.

However, when using this method, since the load applied to the motor 10, each gear and each roller during the jam removal acts on the jam removing gear 40, a considerable burden is placed on the user. In addition, the progress of the manuscript is very slow because it is too slow.

The present invention was created to solve the above problems, automatic jam conveying is made possible to transfer the bi-directional feed so that the original can be moved in a direction advantageous to remove the jam when the jam occurs in the automatic document conveying device employed in the multifunction machine It is an object of the present invention to provide a device and a method for removing jam documents.

In order to achieve the above object, the automatic document conveying apparatus according to the present invention,

A feed roller for feeding an original; A feeding roller for transferring an original supplied from the feed roller along an original feed path; A discharge roller for discharging an original conveyed from the feeding roller; A motor for driving the feed roller, feeding roller and discharge roller; A first gear train transferring power of the motor to a supply roller; A second gear train that transfers power of the motor to a feeding roller; A third gear train that transfers power of the motor to a discharge roller; A first power changer installed between the first gear train and the second gear train or between the first gear train and the third gear train so as to switch power by a swing motion; And a second power changer installed in the second gear train or the third gear train so as to switch power by a swing motion.

When the jam occurs in the automatic document feeder, the motor is rotated in a direction opposite to the rotation direction of the motor before the jam is generated, and the first gear train, the second gear train, and the third gear are driven by the first and second power changers. It is characterized in that the power transmission through the heat is cut off.

The third gear train may be formed of two gear trains to transmit power to the discharge roller regardless of the rotation direction of the motor according to the operation of the first power switch or the second power switch.

In order to achieve the above object, a jam original removing method according to the present invention includes a feed roller for feeding an original, a feeding roller for transferring an original supplied from the feeding roller along an original feed path, and an original transferred from the feeding roller. A jam removing method in a document conveying apparatus for scanning, comprising a discharge roller for discharging, a feed roller, a feeding roller, and a motor for driving the discharge roller,

Rotating the motor in a direction opposite to the direction of rotation of the motor before the jam is generated, if an original jam occurs during the document transfer; The swing of the power changer according to the rotation of the motor in the first gear train for transmitting the power of the motor to the feed roller, the second gear train for transmitting to the feeding roller, the third gear train for transmitting power to the discharge roller Interrupting power transmission by operation; And removing the jam original in one of an original feed direction and an original feed opposite direction.                     

Hereinafter, an automatic document conveying apparatus according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

An automatic document conveying apparatus according to a preferred embodiment of the present invention is employed in a multifunction apparatus and used to perform a scanning operation. When a jam is generated during scanning of the original, a power changer is provided to swing to remove the jam in either of the original feed direction and the opposite direction.

Referring to FIG. 2A, the automatic document conveying apparatus according to the first embodiment of the present invention provides a feed roller 105 for supplying a document and a feed for conveying a document supplied from the feed roller 105 along a document feed path. Motor M for driving the roller 115, the discharge roller 127 for discharging the document transferred from the feeding roller 115, the feed roller 105, the feeding roller 115 and the discharge roller 127 It includes.

And, the first gear train including at least one gear to transmit the power of the motor M to the supply roller 105, the at least one gear to transmit the power of the motor M to the feeding roller 115 A second gear train including a, and a third gear train including at least one gear for transmitting power to the discharge roller 127.

The first gear train includes the first gear 100 and the second gear 103, and the second gear train includes the first gear 100 and the third gear 113. And, the third gear train is composed of two gear trains, one gear train includes a fourth gear 120, the fifth gear 123 and the seventh gear 125, the other gear train Includes a fourth gear 120 and a sixth gear 130.

The first gear 100 is coupled to the motor M, and the second and third gears 103 and 113 are coupled to the first gear 100, and the first gear 100 and the second are coupled to the first gear 100. And a first power switch 102 for switching power by a swing motion between the third gears 103 and 113. The supply roller 105, the first idler gear 107, and the pickup roller 110 are sequentially coupled to the second gear 103. According to the operation of the first power switch 102, the second gear 103 is attached to or detached from the supply roller 105, or the third gear 113 is detached from the feeding roller 115.

The fourth gear 120 is coupled to the motor M, and the fifth and sixth gears 123 and 130 are coupled to the fourth gear 120, with the fourth gear 123 as the center. Between the fifth and sixth gears 123 and 130, a second power switch 121 for switching power by a swing motion is coupled. In addition, the seventh gear 125 is detached from the fifth gear 123 or the sixth gear 130 is detached from the discharge roller 127 according to the operation of the second power converter 121. have. The discharge roller 127 is coupled to the seventh gear 125.

The first sensor (S1) for detecting the presence of the document is provided before the feed roller 105, the second sensor (S2) for detecting the arrival of the leading edge of the document is provided before the feeding roller 115, the discharge roller ( 127) A third sensor S3 for detecting the arrival of the rear end of the document is provided.

On the other hand, the automatic document transfer device according to the present invention includes a controller (C) for controlling the motor to rotate in the direction opposite to the motor rotation direction immediately before the jam occurs when the jam of the original. The controller C rotates the motor M by a predetermined step until the first and second power changers are swinged so that power transmission of the first gear train, the second gear train, and the third gear train is all interrupted.

The operation of the document conveying apparatus according to the first embodiment is as follows.                     

FIG. 2A shows a first step in which the motor M rotates counterclockwise to drive the feed roller 105 and the pickup roller 110, while not transmitting power to the feeding roller 115. 2B shows a second step in which the motor M rotates clockwise so that the supply roller 105 and the pickup roller 110 are stopped while driving the feeding roller 115.

On the other hand, in this embodiment, the third gear train is composed of two rows so that the discharge roller 127 is operated regardless of the rotation direction of the motor M.

Referring to FIG. 2A, when the motor M rotates counterclockwise, the first gear 100 and the fourth gear 120 rotate in the clockwise direction. When the first gear 100 is rotated in the clockwise direction, the second gear 103 is coupled to the feed roller 105 by the operation of the first power switch 102, while the third gear 113 is fed. Away from the roller 115. Therefore, the power of the motor M is transmitted to the supply roller 105 and the pickup roller 110 through the first gear 100 and the second gear 103.

Meanwhile, as the fourth gear 120 rotates in the clockwise direction, the fifth gear 123 is coupled to the seventh gear 125 by the operation of the second power converter 121, and the sixth gear ( 130 is separated from the discharge roller 127.

Finally, in the first step in which the motor M is driven in the counterclockwise direction CCW, the power of the motor M is transmitted to the supply roller 105 and the pickup roller 110, and the original is transferred to the second sensor S2. Transfer until Then, the power of the motor is transmitted to the discharge roller 127 through the fourth gear 120, the fifth gear 123 and the seventh gear 125 to discharge the document while the discharge roller 127 is rotated.

When the arrival of the leading edge of the document is detected by the second sensor S2, the rotation of the motor M is decelerated and the feeding roller 115 does not rotate until the motor M rotates in reverse, so that the originals are aligned and registered. The function is performed.

Next, as shown in FIG. 2B, when the motor M rotates counterclockwise and rotates clockwise, the first gear 100 and the fourth gear 120 are simultaneously rotated counterclockwise. As the first gear 100 rotates, the first swing gear 102 is operated so that the second gear 103 falls from the supply roller 105, while the third gear 113 feeds the feeding roller 115. Is coupled to.

The first gear 100 is rotated in the counterclockwise direction, the third gear 113 is rotated in the clockwise direction, the feeding roller 115 is rotated in the counterclockwise direction and the original is conveyed toward the discharge roller 127. .

When the original passes through the second sensor S2 and the rear end of the original leaves the CCD 116, the motor M rotates counterclockwise again to repeat the above process. Here, in the structure in which the discharge roller 127 is operated irrespective of the rotational direction of the motor, a new document is transferred to the feeding roller 115 by the feed roller 105 in the first step, and the discharge roller 127 is moved. This allows the previously fed manuscript to be discharged. In this way, the document feed speed can be increased.

Next, the operation for removing the jam paper when a jam occurs during the document transfer process will be described.

When the jam of the document is generated, the motor is rotated by the controller C in a direction opposite to the motor rotation direction immediately before the jam is generated. The motor M is reversely rotated until the power transmission of the first gear train, the second gear train and the third gear train is blocked by the first and second power converters 102 and 121. As such, when the power transmission of the first, second and third gear trains are all blocked, the jam original can be easily removed by pulling the original in any direction of the original transfer direction and the opposite direction of the original transfer.

Specifically, when the document is caught between the feed roller 105 and the second sensor S2, the motor was rotated counterclockwise until now, so that the motor is rotated by a predetermined step in the opposite direction, that is, clockwise. Then, the first power switch 102 is swinged so that the second gear 103 falls from the supply roller 105 and the third gear 113 also falls from the feeding roller 115.

Next, when the document was sandwiched between the second sensor S2 and the discharge roller 127, the motor was rotated clockwise until now, so that the original is rotated in the opposite direction, that is, counterclockwise. Then, the first power switch 102 is swinged so that the third gear 113 is separated from the feeding roller 115 and the second gear 103 is also separated from the supply roller 105. In addition, the second power switch 121 is swinged so that the sixth gear 130 is separated from the discharge roller 127 and the fifth gear 123 is not coupled to the seventh gear 125.

Therefore, when jam occurs, there is no gear bite in any direction, so the original jammed in the machine can be easily taken out. That is, when the document is sandwiched between the pickup roller 110 and the second sensor (S2), it is possible to easily remove the original by pulling the rear end of the document toward the pickup roller (110), the original is the second sensor (S2) When sandwiched between and the discharge roller 127, it is possible to easily remove the original by pulling the leading edge toward the discharge roller 127.

Meanwhile, the fifth gear 123 and the seventh gear 125 may be removed from the configuration described with reference to FIG. 2A. As shown in FIG. 3, the fourth gear 120 and the sixth gear 130 are sequentially coupled from the motor M, and the sixth gear 130 is coupled to the supply roller 127. The fourth gear 120 and the sixth gear 130 are coupled by a third power changer 133 that swings.

The sixth gear 130 swings along the rotational direction of the fourth gear 120 by the third power changer 133, and engagement with the discharge roller 127 is interrupted.

In this case, when the motor M is rotated in the clockwise direction, the third gear 113 is coupled to the feeding roller 115 and the sixth gear 130 is coupled to the discharge roller 127. Thus, the feeding roller 115 and the discharge roller 127 are operated while the pickup roller 110 and the feed roller 105 are not operated.

On the other hand, when the motor M is rotated in the counterclockwise direction, the second gear 103 is coupled to the supply roller 105 by the swing operation of the first power switch 102, and the third gear 113 is The sixth gear 130 is separated from the feeding roller 115, and the sixth gear 130 is separated from the discharge roller 127 by the swing operation of the third power changer 133. The case indicated by a dotted line in the drawing shows a case in which the motor M rotates counterclockwise. Therefore, only the feeding roller 105 is operated at this time and the feeding roller 115 and the discharge roller 127 are not operated.

In this way, when the discharge roller 127 is operated only in the second step, the document is completely discharged via the pickup roller 110, the feeding roller 105, the feeding roller 115, and the discharge roller 127, The manuscript is supplied.

Next, the automatic document conveying apparatus according to the second embodiment of the present invention includes a pickup roller 150, a feed roller 155, a feeding roller 160, and a discharge roller, which pick up originals as shown in FIG. 165 and a motor M for driving the rollers.

A first gear train is arranged between the motor M and the supply roller 165, and a second gear train is arranged between the motor M and the feeding roller 160, and the motor M and the discharge roller ( A third gear train is arranged between 165.

The second gear train includes a first gear 140 and a second gear 142 disposed between the motor M and the feeding roller 160.

Between the first gear 140 and the second gear 142, a first power switch 141 for swinging operation is installed so that the power of the motor M is controlled by the operation of the first power switch 141. It may or may not be transmitted to the feeding roller 160.

The first gear train includes a third gear 145, a fourth gear 147, a fifth gear 152, and a sixth gear 154. The third gear train includes the third gear 145, the fourth gear 147, the fifth gear 152, and the seventh gear 153. An eighth gear 149 may be further provided between the fourth gear 147 and the discharge roller 165.

A second power converter 161 swinging between the fifth gear 152 and the eighth gear 149 is installed around the fourth gear 147. By the operation of the second power switch 161, the power of the motor M is transmitted to the supply roller 155 or to the discharge roller 165.                     

Meanwhile, a ninth gear 157 is provided between the supply roller 155 and the feeding roller 150.

In addition, when a jam of the document is generated, the controller C is configured to control the motor to rotate in a direction opposite to the motor rotation direction immediately before the jam is generated. The controller C reversely rotates the motor M until the first and second power changers are swinged so that power transmission of the first gear train, the second gear train and the third gear train is all interrupted.

Next, an operation relationship of the document conveying apparatus according to the second embodiment of the present invention will be described.

When the motor M rotates clockwise, power is transmitted to the feeding roller 160 along the first gear 140 and the second gear 142 so that the feeding roller 160 rotates counterclockwise. At the same time, the discharge roller 165 is rotated counterclockwise through the second gear train. At this time, the fifth gear 152 is separated from the sixth gear 154 by the operation of the second power switch 161, the supply roller 155 is not operated. The eighth gear 149 is also separated from the supply roller 165.

When the motor M rotates in the counterclockwise direction, the second gear 142 is separated from the feeding roller 160 by the operation of the first power switch 141. At the same time, the fifth gear 152 is coupled to the sixth gear 154 by the operation of the second power switch 161, so that power is transmitted to the supply roller 155 through the first gear train to supply the supply roller ( 155 is rotated clockwise. In addition, the pickup roller 150 is also rotated through the ninth gear 157.

Meanwhile, the eighth gear 149 is coupled to the supply roller 165 to operate the discharge roller 165.                     

Therefore, when the motor M rotates in the counterclockwise direction, the pickup roller 150, the supply roller 155, and the discharge roller 165 operate while the feeding roller 160 does not operate. When the motor M rotates in the clockwise direction, the feeding roller 160 and the discharge roller 165 operate while the pickup roller 150 and the supply roller 155 do not operate.

In this example, the discharge roller 165 is operated regardless of the rotational direction of the motor M. As shown in FIG. Thereby, the original can be discharged through the discharge roller 165 and at the same time a new original can be supplied through the pickup roller 150 and the supply roller 155. Therefore, there is an advantage that can increase the scanning speed of the document.

Meanwhile, the discharge roller 165 may be operated without the eight gears 149. When the eighth gear 149 is not provided, when the motor M rotates clockwise, the discharge roller 165 rotates counterclockwise together with the feeding roller 160, while the motor M is counterclockwise. When the clockwise rotation is performed, the discharge roller 165 is not operated, and only the supply roller 155 and the pickup roller 150 are rotated.

When document jams are generated in the document conveying apparatus operating in this manner, the motor M is rotated a predetermined step in a direction opposite to the direction in which the motor M was rotated before the jam was generated. Then, the second gear 142 is separated from the feeding roller 160 in accordance with the operation of the first and second power switch (141, 161), the fifth gear 152 is the sixth gear 154 or Falling from the seventh gear 153, the eighth gear 149 is separated from the discharge roller 165.

Therefore, the pickup roller 150, the supply roller 155, the feeding roller 160 and the discharge roller 165 are all freely rotatable in both directions can be easily removed jam.

Next, a document conveying apparatus according to a third embodiment of the present invention will be described with reference to FIG.

5 illustrates a case where the power changer is configured with one swing link.

The document conveying apparatus according to the third embodiment includes a feed roller 170, a feeding roller 180, a discharge roller 190, and a motor M. And, the first gear train for transmitting the power of the motor (M) to the supply roller 170, the second gear train for transmitting to the feeding roller 180, and the third gear train for transmitting to the discharge roller 190. .

The first gear train includes a first gear 171 coupled to the motor M, a second gear 172, a third gear 173, and a fourth gear 174 sequentially coupled to the first gear 171. And a fifth gear 175. The second gear train further includes a sixth gear 181 and a seventh gear 182 including the first gear 171, the second gear 172, and the third gear 173. The third gear further includes an eighth gear 176 including a first gear 171 and a second gear 172.

In addition, a power changer 185 is installed in the third gear 173 and the eighth gear 176 around the second gear 172 to switch power by a swing operation. The third gear 173 swings between the fourth gear 174 and the sixth gear 181 by the power changer 185 to interrupt the first gear train and the second gear train. At the same time, the eighth gear 176 swings with respect to the discharge roller 190 by the power changer 185 to interrupt the third gear train.

In addition, when the jam of the document is generated is provided with a controller (C) for controlling the motor to rotate in the direction opposite to the motor rotation direction immediately before the jam occurs. The controller C is as described above.

 Meanwhile, a ninth gear 177 and a tenth gear 178 are further coupled to the second gear 172, and a swing link is added between the second gear 172 and the ninth gear 177. The ninth gear 178 may be interrupted with respect to the tenth gear 178. As such, when the third gear train that transmits power to the discharge roller 190 is configured in two paths, the discharge roller 190 may be operated regardless of the rotation direction of the motor M. FIG. When the discharge roller 190 is to be operated irrespective of the rotational direction of the motor, the power changer 185 may be driven by the third gear 173, the eighth gear 176, and the second gear 172. Coupling to the ninth gear (177).

When the motor M rotates in the clockwise direction, power is transmitted along the first gear train to operate the feed roller 175 in the clockwise direction, and includes a ninth gear 177 and a tenth gear 178. The discharge roller 190 is operated in the counterclockwise direction through the third gear train.

When the motor M rotates in the counterclockwise direction, the third gear 173 is separated from the fourth gear 174 and coupled to the sixth gear 181, so that power is supplied to the feeding roller 180 through the second gear train. It is transmitted and the feeding roller 180 is operated. At the same time, the ninth gear 177 is separated from the tenth gear 178 and the eighth gear 176 is coupled to the discharge roller 190 to operate the discharge roller 190. The case indicated by a dotted line in the drawing shows a case in which the motor M is rotated counterclockwise.

On the other hand, when the original jam occurs during the document transfer, the power switch 185 swings by rotating the motor in a direction opposite to the motor rotation direction just before the jam is generated. The motor rotates until the first gear train, the second gear train and the third gear train are all able to block the transmission of power by the swing motion. Then, the jam original is pulled out in one of the original feed direction and the original feed opposite direction to be removed.

Next, a jam manuscript removal method according to a preferred embodiment of the present invention will be described. Jam original removal method according to the present invention can be implemented by blocking the power transmission of the gear train for transmitting power to the feed roller, the feeding roller and the discharge roller through a power switch for driving the swing in the document conveying apparatus of the present invention described above. have.

Jam original removal method according to the present invention can be applied to all of the document conveying apparatus having a power switch is a swing-driven, it will be described with reference to Figure 2 for convenience.

The document conveying apparatus includes a feed roller 105 for supplying an original, a feeding roller 115 for conveying an original supplied from the feed roller 105 along an original conveyance path, and an original conveyed from the feeding roller 115. And a motor M for driving the discharge roller 127 for discharging, the supply roller 105, the feeding roller 115, and the discharge roller 127.

In addition, a first gear train including at least one gear for transmitting power of the motor M to the supply roller 105, and a second including at least one gear for transmitting power to the feeding roller 115. The gear train includes a third gear train including at least one gear for transmitting power to the discharge roller 127.

6 is a block diagram showing a document transfer process and a jam document removal process.

When the document is supplied according to the document carrying instruction, the motor is rotated in the counterclockwise direction, for example, according to the judgment of the presence or absence of the document by the first sensor S1, and the document is transferred along the document transfer path. When jam occurs during the document transfer, the motor is rotated in a direction opposite to the rotation direction before jam generation, that is, clockwise, so that the first gear train, the second gear train, and the third gear train are all in a power transmission interruption state. In this way, jam originals can be easily removed in both directions of the original feed direction and the opposite direction of the original feed. After the jam original is removed, a new original is fed and the original is fed along the transfer path.

Then, when the tip of the document is detected by the second sensor S2, the motor rotates counterclockwise, that is, clockwise. Originals are aligned and registration is performed while the motor prepares for reverse rotation. If the jam is generated after the original passes through the second sensor S2, the motor is rotating clockwise, so that the motor rotates in the opposite direction, that is, counterclockwise. As a result, the first gear train, the second gear train and the third gear train are all in the state of power transmission interruption, so that jammed documents can be easily removed in both directions of the document feed direction and the document feed opposite direction.

Specifically, when the document leading edge is sandwiched between the feed roller and the first sensor, the motor has been rotated counterclockwise until a few steps so as to rotate clockwise. Then, when the power changer is separated from the gear train, the paper is pulled in a favorable direction to remove the paper.

When the tip of the document is sandwiched between the first sensor and the second sensor, the motor has been rotated clockwise until now, so it rotates a few steps counterclockwise. Then, when the power changer is separated from the gear train, the original is pulled and removed in a favorable direction.

In this way, the jam manuscript can be easily removed in a favorable direction of the paper advance direction and the opposite direction by blocking power transmission through the first, second and third gear trains by using a power switch that swings when a jam occurs. Can be.

On the other hand, when the rear end of the original is detected by the third sensor S3, the original is discharged. At this time, if the discharge roller is structured to operate regardless of the rotational direction of the motor, the document feeder and the original feed for subsequent new work may be performed at the same time.

As described above, the automatic document conveying device and the jam document removing method according to the present invention employ a power switch of a swing structure to pull out jam paper in both directions of the document feed direction and the opposite direction, so that the jam paper is simply and easily. Can be removed.

In addition, since the structure does not need to provide a separate part for removing jam paper, the structure is simplified, and jam removal can be made quickly and simply, so there is an advantage of increasing the number of document feeds per minute.

Claims (5)

A feed roller for feeding an original; A feeding roller for transferring an original supplied from the feed roller along an original feed path; A discharge roller for discharging an original conveyed from the feeding roller; A motor for driving the feed roller, feeding roller and discharge roller; A first gear train transferring power of the motor to a supply roller; A second gear train that transfers power of the motor to a feeding roller; A third gear train that transfers power of the motor to a discharge roller; A first power changer installed between the first gear train and the second gear train or between the first gear train and the third gear train so as to switch power by a swing motion; And a second power changer installed in the second gear train or the third gear train to switch power by a swing motion. The method of claim 1, When the jam is generated, the motor is rotated in a direction opposite to the rotation direction of the motor before the jam is generated, so that power transmission through the first gear train, the second gear train, and the third gear train is performed by the first and second power changers. An automatic document conveying apparatus, characterized in that it is blocked. The method according to claim 1 or 2, And the first and second power changers are composed of swing links. The method according to claim 1 or 2, The third gear train is an automatic document comprising two gear trains for transmitting power to the discharge roller regardless of the rotation direction of the motor according to the operation of the first power switch or the second power switch. Conveying device. Driving a feed roller for feeding an original, a feeding roller for transferring an original supplied from the feeding roller along an original feed path, a discharge roller for discharging an original transferred from the feeding roller, the feeding roller, a feeding roller, and a discharge roller A jam removing method in an automatic document conveying apparatus for scanning including a motor for Rotating the motor in a direction opposite to the direction of rotation of the motor before the jam is generated, if an original jam occurs during the document transfer; The swing of the power changer according to the rotation of the motor in the first gear train for transmitting the power of the motor to the feed roller, the second gear train for transmitting to the feeding roller, the third gear train for transmitting power to the discharge roller Interrupting power transmission by operation; Removing the jam original in one of an original feeding direction and an original feeding opposite direction.

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