JP2022074903A - Image processing device - Google Patents

Abstract

To achieve both of smooth pull-out of a sheet from a conveyance roller in the conveyance abnormality and proper switching of a state of a stopper in a case of performing driving of the conveyance roller and switching of the state of the stopper by using the driving force of one motor.SOLUTION: A compound machine 1 comprises: a motor 70; conveyance rollers 44, 45 which convey a sheet SH along a conveyance path P1; a stopper 80 which can be displaced between the first position and the second position that permits passage of the sheet SH in the conveyance direction; a holder 51, a contact rib 132 and a lock lever 100 which turn the stopper 80 into the regulation state that regulates the passage of the sheet SH in the conveyance direction when the first driving force is input and turn the stopper 80 into the regulation release state that permits movement of the sheet SH in the conveyance direction at the second position when the second driving force is input; and a planetary gear mechanism 73 which transmits the second driving force to the conveyance rollers 44, 45 and shuts down the transmission of the first driving force to the conveyance rollers 44, 45.SELECTED DRAWING: Figure 10

Description

The present invention relates to an image processing device having a function of restricting the insertion of a sheet by a user.

Conventionally, as described in Patent Document 1, for example, a technique for rotating a first delivery roller, a second delivery roller, a paper feed roller, and a paper discharge roller by the driving force of a paper feed motor, a paper feed motor, and a paper discharge motor, respectively. It has been known. Further, in this conventional technique, a regulating member is provided between the first delivery roller and the second delivery roller. This regulating member switches between a first position mode that appears on the transport path for restricting the passage of paper by using the driving force of the delivery motor and a second position mode that retracts from the paper transport path. Be done.

Japanese Unexamined Patent Publication No. 2010-37020

To switch the driving force for driving the transfer roller that conveys the sheet and the stopper for restricting the insertion of the sheet by the user between the state of restricting the passage of the sheet and the state of allowing the passage of the sheet. In a configuration in which the driving force is supplied from one motor, the paper may have to be pulled out by hand when some kind of transfer abnormality occurs when the sheet is conveyed on the transfer path as described above. For example, when a DC motor is used, torque is unlikely to be generated when the power is off, so that it is unlikely to interfere with the above-mentioned extraction. However, from the viewpoint of reducing the manufacturing cost, for example, when a stepping motor or the like is used, the torque may hinder the extraction.

In order to avoid this, for example, it is conceivable to provide a mechanism capable of switching between transmission and interruption of the driving force between the stepping motor and the roller. However, in that case, it is necessary to consider so as not to interfere with the operation of switching the state of the stopper.

An object of the present invention is to smoothly pull out the sheet from the transport roller at the time of transport abnormality and to change the state of the stopper when the transport roller is driven and the state of the stopper is switched by using the driving force of one motor. It is an object of the present invention to provide an image processing apparatus capable of achieving both appropriate switching.

In order to achieve the above object, the present invention rotates in the first rotation direction to generate a corresponding first driving force, or rotates in a second rotation direction opposite to the first rotation direction to correspond to the first rotation direction. A motor capable of generating two driving forces, a transport roller that rotates by transmitting the second driving force from the motor and transports the sheet along a transport path, a first position, and the first position. A stopper displaceable between a second position farther from the transport path than the first position and a second position that allows the seat to pass in the transport direction, and the first driving force from the motor are input. When this is done, the stopper is placed in the restricted state of restricting the passage of the seat in the transport direction at the first position, and when the second driving force from the motor is input, the stopper is placed at the second position. A stopper switching mechanism that allows the seat to move in the transport direction is released, and the second driving force from the motor is transmitted to the transport roller, and the first driving force from the motor is transmitted. It is characterized by comprising a first transmission switching mechanism that cuts off transmission to the transfer roller.

The image processing apparatus of the present invention includes a transport roller that transports a sheet along a transport path. Further, a stopper that can be displaced between the first position and the second position is provided, and the stopper is in a regulated state that restricts the passage of the sheet in the transport direction at the first position, and the stopper passes through the sheet in the transport direction at the second position. It will be in a state of deregulation that allows.

Switching between the regulated state and the deregulated state of the stopper is performed by the stopper switching mechanism according to the mode of the input driving force of the motor. That is, when the first driving force generated by the rotation of the motor in the first rotation direction is input, the stopper is in the restricted state at the first position, and the second generated by the rotation of the motor in the second rotation direction. When two driving forces are input, the stopper is released from the regulation at the second position.

Similarly, the transmission of the driving force of the motor to the transport roller is switched by the first transmission switching mechanism according to the mode of the driving force of the motor. That is, when the second driving force is emitted from the motor, the second driving force is transmitted to the transport roller, and when the first driving force is emitted from the motor, the driving force is transmitted to the transport roller. Is not performed and is blocked.

As described above, in the present invention, when the motor rotates in the second rotation direction to generate the second driving force, the stopper is released from the regulation state to allow the sheet to be conveyed, and the second driving force is applied. It is transmitted to the transfer roller, and the sheet is transferred by the transfer roller.

On the other hand, when the motor rotates in the first rotation direction to generate the first driving force, the stopper is in the regulated state, the passage of the sheet in the transport direction is restricted, and the transmission of the driving force to the transport roller is cut off. That is, when some kind of transfer abnormality occurs during sheet transfer by the transfer roller based on the second drive force, the transmission of the drive force to the transfer roller can be cut off by driving the motor in the first rotation direction, for example. It can be easily pulled out even when a stepping motor or the like is used.

As described above, according to the present invention, the appropriate switching between the two states of the stopper using the driving force of one motor and the smooth withdrawal of the seat from the transport roller at the time of transport abnormality are achieved at the same time. be able to.

According to the present invention, when the transfer roller is driven and the state of the stopper is switched by using the driving force of one motor, the sheet is smoothly pulled out from the transfer roller at the time of transfer abnormality and the state of the stopper is changed. It is possible to achieve both appropriate switching.

It is a schematic diagram which shows the conceptual whole structure of the multifunction device by one Embodiment of this invention. It is a perspective view which shows the appearance composition of the multifunction device. It is a top view which shows the appearance composition of a multifunction device. It is a cross-sectional view which looked at the main part sectional structure of a reading unit from the rear. FIG. 3 is a cross-sectional view showing a state in which the opening / closing cover is opened in the structure shown in FIG. FIG. 3 is a perspective view showing a state in which the opening / closing cover is opened in the structure shown in FIG. It is sectional drawing which shows the state which a stopper is engaged with a lock lever, and is the partial enlarged view. It is sectional drawing which shows the state which the engagement between a stopper and a lock lever is disengaged, and is the partial enlarged view. It is a functional block diagram which shows the electric structure of the multifunction device 1. It is sectional drawing which shows the transmission structure of the driving force from a motor to a transfer roller and a paper discharge roller. It is sectional drawing which shows the transmission structure of the driving force from a motor to a transfer roller and a paper discharge roller. It is sectional drawing for demonstrating the composition of transmission of the driving force from a motor to a separation roller. It is sectional drawing which shows the state which opened the opening / closing cover in the structure shown in FIG. It is sectional drawing for demonstrating the transmission structure of the driving force from a motor to a paper feed roller. It is a partially enlarged sectional view for demonstrating transmission and cutoff of a driving force by movement of a planetary gear, and swinging of a holder. It is a partially enlarged sectional view for demonstrating transmission and cutoff of a driving force by movement of a planetary gear, and swinging of a holder.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that each drawing is used for explaining the technical features that can be adopted in the present disclosure, and the configuration and the like of the apparatus described are not intended to be limited to that, but are merely explanatory examples.

<Overall outline configuration of the multifunction device>
FIG. 1 conceptually shows the overall schematic configuration of the multifunction device 1 of the present embodiment. The multifunction device 1 is an example of an image processing device. In the multifunction device 1 shown in FIG. 1, the front side facing the paper surface is defined as the front side of the device, the side coming to the left hand side facing the paper surface is defined as the left side, and each direction of front / rear, left / right, and up / down is displayed. .. Then, each direction shown in each subsequent figure is displayed corresponding to each direction shown in FIG.

As shown in FIG. 1, the multifunction device 1 includes a main body unit 2 and a reading unit 3. The reading unit 3 includes an ADF unit 9 and an FB unit 5. An operation panel 40 (see FIG. 9 described later), which is a touch panel or the like, is provided on the front surface of the FB unit 5 of the ADF unit 9.

As shown in FIG. 1, the main body unit 2 is a flat substantially box-shaped body, and has an image forming portion 4 inside. The image forming unit 4 is based on image data received from a personal computer connected to the multifunction device 1 by an inkjet method, a laser method, or the like, image data generated by reading an image of a document by a reading unit 3, and the like. Form an image on the recording paper. The reading unit 3 is arranged above the main body unit 2. The FB unit 5 is used when reading an image of a document placed on the document support surface 101A, which will be described later. The ADF unit 9 has a supply tray 12, a discharge tray 14, and a transport unit 6. The transport unit 6 transports the sheet SH placed on the supply tray 12 along the transport path P1 and discharges the sheet SH to the discharge tray 14. The ADF unit 9 is used when the image of the sheet SH placed on the supply tray 12 is read while being sequentially conveyed along the transfer path P1. The sheets to be read include paper, OHP sheets, and other sheets, as well as originals and the like.

<Appearance of ADF part>
The appearance configuration of the ADF unit 9 is shown in FIGS. 2 and 3. As shown in FIGS. 2 and 3, the ADF portion 9 is swingably supported around the opening / closing axis X9 extending in the left-right direction by a hinge (not shown) arranged at the rear portion. The ADF unit 9 covers the document support surface 101A, which will be described later, from above in the closed state shown in FIGS. 2 and 3. Although not shown, the ADF portion 9 exposes the document support surface 101A by swinging around the opening / closing axis X9 so that the front end portion thereof is displaced upward and backward. As a result, the user can support the document to be read on the document support surface 101A.

As shown in FIGS. 2 and 3, the supply tray 12 is formed on the right side of the ADF portion 9. The upper surface of the supply tray 12 is a paper feed surface 12A that supports the sheet SH from below. A plurality of sheets SH to be read, which are conveyed by the conveying unit 6, are loaded on the feeding surface 12A. The paper feed surface 12A is a flat surface that is inclined downward to the left. The front guide 17F and the rear guide 17R are provided on the supply tray 12 so as to be slidable in the front-rear direction. When the front guide 17F and the rear guide 17R approach or separate from each other, a plurality of types of sheet SH having different sizes supported by the supply tray 12 are sandwiched from the front and back. As shown in FIGS. 2 and 3, the discharge tray 14 is located below the supply tray 12. The upper surface of the discharge tray 14 is a paper discharge surface 14A that supports the sheet SH from below. An image is read by the image sensor 3S on the paper ejection surface 14A, and the sheet SH ejected by the transport unit 6 is loaded. The paper ejection surface 14A is a flat surface that inclines upward from left to right.

As shown in FIGS. 2 and 3, an opening / closing cover 32 is provided on the upper portion of the ADF portion 9. The opening / closing cover 32 is a substantially flat plate member extending in the front-rear and left-right directions from the substantially center of the ADF portion 9 to the left end. The left end portion of the opening / closing cover 32 is bent downward. The opening / closing cover 32 is swingably supported around the opening / closing axis X32 extending in the front-rear direction at its left end and lower end. As a result, the open / close cover 32 can be displaced between the closed position shown by the solid line in FIGS. 2 and 3 and the open position shown in FIG. 5 or the like described later. In the closed position, the opening / closing cover 32 functions to cover the transport path P1. Further, the left end and the lower end portion are examples of one end of the opening / closing cover 32.

<Cross-sectional structure of reading unit>
FIG. 4 is a rear view of the cross-sectional structure of the main part of the reading unit 3, and FIG. 5 is a view showing a state in which the opening / closing cover 32 is opened in the cross-sectional structure. In FIGS. 4 and 5, a platen glass 101 is arranged on the upper surface of the FB portion 5. The original support surface 101A is formed by the upper surface of the platen glass 101. The image sensor 3S is provided in the FB portion 5 below the platen glass 101 so as to be movable in the left-right direction. The document support surface 101A supports the document from below when the image of the document in a stationary state is read by the image sensor 3S.

The reading surface 101B is formed by the upper surface of the platen glass 101. The reading surface 101B guides the conveyed sheet SH from below when the image of the sheet SH conveyed one by one by the conveying unit 6 is read by the image sensor 3S in the FB unit 5. In the present embodiment, the object from which the image is read using the document support surface 101A is described as a document, and the object from which the image is read while being conveyed by the transport unit 6 is described as a sheet SH. The manuscript and the sheet SH may be substantially the same.

The FB unit 5 has the image sensor 3S, a scanning mechanism (not shown), and the platen glass 101. The scanning mechanism reciprocates the image sensor 3S in the left-right direction below the document support surface 101A and the reading surface 101B. When reading an image of a document supported by the document support surface 101A, the image sensor 3S reads the image while moving below the document support surface 101A. When reading an image while transporting the sheet SH by the transport unit 6, the image sensor 3S is stopped at a predetermined static reading position. Here, the static reading position at which the image sensor 3S stops is a position facing the reading surface 101B from below. As the image sensor 3S, a well-known image reading sensor such as CIS (Contact Image Sensor) or CCD (Charge Coupled Device) is used.

A base member 9A is provided in the lower portion of the ADF portion 9. The base member 9A constitutes the bottom of the ADF portion 9. The right portion of the base member 9A constitutes the above-mentioned discharge tray 14. The transport portion 6 is provided between the opening / closing cover 32 of the ADF portion 9 and the left portion of the base member 9A. The transport unit 6 has an upper chute member 130 and a lower chute member 140 assembled to the base member 9A. The lower chute member 140 is located below the upper chute member 130. The base member 9A is located below the lower chute member 140.

As shown in FIGS. 4, 5, and 6, a plurality of guide ribs 32R extending in the left-right direction are formed side by side in the front-rear direction on the inner surface of the opening / closing cover 32. The upper guide surface 32A is formed by the lower end edges of the guide ribs 32R. The upper guide surface 32A defines the upper route P1A, which will be described later, from above among the transport routes P1.

A first upper transport surface 130A and a second upper transport surface 130B are formed on the upper surface of the upper chute member 130. The first upper transport surface 130A is a flat surface adjacent to the left end of the supply tray 12 and inclined downward to the left. The loading surface 150A is composed of the first upper transport surface 130A of the upper chute member 130 and the feeding surface 12A of the supply tray 12. A plurality of sheets SH to be read, which are conveyed by the conveying unit 6, are loaded on the loading surface 150A. The loading surface 150A is an example of a supporting surface. The second upper transport surface 130B is a substantially flat surface that is inclined upward to the left following the first upper transport surface 130A.

Lower guide surfaces 140A1 and 140A2 are formed on the lower surface of the lower chute member 140. The lower guide surface 140A1 is a substantially flat surface that inclines downward to the right toward the reading surface 101B from the vicinity of the left end portion in the ADF portion 9. The lower guide surface 140A2 is a substantially flat surface that is inclined upward to the right following the lower guide surface 140A1. On the upper surface of the base member 9A, a lower transport surface 140B1 facing the lower guide surface 140A1 from below and a lower transport surface 140B2 facing the lower guide surface 140A2 from below are formed.

The transport path P1 in the transport unit 6 includes the first upper transport surface 130A of the upper chute member 130, the second upper transport surface 130B, the lower guide surfaces 140A1 and 140A2 of the lower chute member 140, and the upper guide surface of the open / close cover 32. It is defined as a space surrounded by 32A, the lower transport surfaces 140B1 and 140B2 of the base member 9A, and various transport rollers and the like. More specifically, the transport path P1 is a portion extending leftward from the feed surface 12A of the supply tray 12 along the first upper transport surface 130A and the second upper transport surface 130B of the upper chute member 130. Includes. Next, the transport path P1 includes a curved path P1B which is a portion connected to the upper path P1A and curved downward. Next, the transport path P1 is connected to the curved path P1B, is inclined downward from the lower end of the curved portion toward the reading surface 101B, and then extends shortly to the right along the reading surface 101B, and the reading surface 101B. It includes a lower path P1C consisting of a portion that inclines further to the right from the right end to reach the discharge tray 14. The upper route P1A and the lower route P1C overlap in the vertical direction. The transport direction of the sheet SH transported by the transport unit 6 is leftward in the upper path P1A of the transport path P1, and changes from the left direction to the right direction in the curved path P1B of the transport path P1 and becomes the lower path of the transport path P1. In P1C, it faces to the right. The extending direction and shape of the transport path P1 is an example.

<Separation roller, separation pad, paper feed roller, etc.>
As shown in FIGS. 4, 5, and 6, the transport unit 6 includes a separation unit 50 and a separation pad 56A. Although the details will be described later, the separation unit 50 includes a separation roller 54 having a rotating shaft 54S, a holder 51, and a paper feeding roller 92 having a rotating shaft 92S.

The separation roller 54 is located to the left of the paper feed roller 92, that is, downstream of the transport path P1 in the transport direction. The separation roller 54 is provided at a position facing the upper transport surface 130B of the upper chute member 130 from above. The rotation shaft 54S of the separation roller 54 is a cylindrical shaft body extending around a rotation axis X54 extending in the front-rear direction, which is a direction orthogonal to the transport direction of the sheet SH. As shown in FIG. 6, the front end and the rear end of the rotating shaft 54S of the separation roller 54 are inside the front cover 31F forming the front end portion of the ADF portion 9 and the rear cover 31R forming the rear end portion of the ADF portion 9. Each of the arranged frames (not shown) is rotatably supported. The separation roller 54 is assembled to the central portion of the rotating shaft 54S.

As shown in FIG. 4, the separation pad 56A forms the transport surface of the sheet SH together with the second upper transport surface 130B. The separation pad 56A is provided at a position facing the separation roller 54 from below. The separation pad 56A is a plate-like body made of a soft material such as rubber or elastomer. The separation pad 56A is pressed toward the separation roller 54 by, for example, an urging spring (not shown).

As shown in FIGS. 4, 5, and 6, the holder 51 accommodates the separation roller 54 in a state of being sandwiched from the front and back while covering the separation roller 54 from above. Details will be described later. The holder 51 is supported by the rotary shaft 54S so as to be swingable around the rotary shaft center X54 of the separation roller 54. Further, the holder 51 extends to the right with respect to the rotation shaft 54S, that is, toward the upstream in the transport direction.

As shown in FIGS. 4, 5, and 6, the paper feed roller 92 is provided at a position facing the first upper transport surface 130A of the upper chute member 130 from above. The paper feed roller 92 is provided so as to be in contact with the sheet SH loaded on the loading surface 150A from above. The paper feed roller 92 is located to the right of the separation roller 54 and is housed in the holder 51. The paper feed roller 92 is rotatably supported by the holder 51 around the rotation axis X92 parallel to the rotation axis X54. Therefore, the holder 51 swings upward or downward around the rotation axis X54 of the separation roller 54, so that the paper feed roller 92 can be displaced to a position approaching and a position away from the loading surface 150A. It is configured.

As shown in FIG. 6, a transmission gear 55 is provided at the rear end of the rotating shaft 54S. The transmission gear 55 rotates the rotary shaft 54S by driving a motor 70 described later. When the transmission gear 55 rotates, the rotation shaft 54S rotates, and the separation roller 54 and the paper feed roller 92 rotate in synchronization with each other. The outer peripheral surface 92A of the paper feed roller 92 applies a conveying force to the sheet SH at the uppermost position among the sheet SH loaded on the loading surface 150A, and sends the sheet SH toward the separation roller 54. As shown in FIGS. 4, 5 and 6, the separation roller 54 cooperates with the separation pad 56A to separate the sheet SH conveyed by the paper feed roller 92 one by one, and in the transfer path P1. Transport downstream in the transport direction.

<Transfer roller>
The transport unit 6 has a first transport roller 44 and a pinch roller 44P on the upper path P1A of the transport path P1 at a position to the left of the separation roller 54, that is, downstream of the separation roller 54 in the transport direction. are doing. The first transfer roller 44 and the pinch roller 44P nip the sheet SH separated one by one by the separation roller 54 and the separation pad 56A, and transfer the sheet SH toward the downstream in the transfer direction.

Further, the transport unit 6 has a curved guide surface 45G, a curved guide surface 45H, a second transport roller 45, and a pinch roller 45P in the curved path P1B in the transport path P1. The curved guide surface 45G and the curved guide surface 45H face each other with a predetermined distance. The curved guide surface 45G defines a portion that curves downward in the curved path P1B from the outside. The curved guide surface 45H defines a portion that curves downward in the curved path P1B from the inside. The second transfer roller 45 and the pinch roller 45P are arranged at the lower end of the curved path P1B. The second transfer roller 45 and the pinch roller 45P nip the sheet SH conveyed by the first transfer roller 44 and the pinch roller 44P, and further transfer the sheet SH toward the reading surface 101B. The left portion of the lower path P1C is defined by the lower guide surface 140A1 and the lower transfer surface 140B1 facing each other with a predetermined distance between the first transfer roller 44 and the pinch roller 44P and the reading surface 101B. ing.

The transport unit 6 further includes a paper ejection roller 48 and a pinch roller (not shown). The lower guide surface 140A2 and the lower transport surface 140B2 face each other with a predetermined interval between the reading surface 101B, the paper ejection roller 48, and the pinch roller, thereby defining the right portion of the lower path P1C. ..

The path formed by the lower guide surface 140A2 and the lower transport surface 140B2 is to the right of the pressing member 49 and is inclined up toward the paper ejection roller 48 and the pinch roller. The paper ejection roller 48 includes a drive shaft 48a, and is located at the right end of the lower guide surface 140A2 of the lower chute member 140. The pinch roller is located at the right end of the lower transport surface 140B2. The paper ejection roller 48 and the pinch roller nip the sheet SH that has passed over the reading surface 101B, and eject the sheet SH toward the paper ejection surface 14A of the ejection tray 14.

<Stopper>
As shown in FIGS. 5 and 6, the ADF unit 9 of the present embodiment is located between the separation roller 54 and the paper feed roller 92, and abuts on the tip of the sheet SH in the transport direction to restrict the movement of the sheet SH. A pair of front and rear stoppers 80F and 80R are provided. Hereinafter, as appropriate, the front stopper 80F and the rear stopper 80R are collectively referred to simply as "stopper 80".

The stopper 80 is configured so that the position can be switched between the regulated state shown in FIGS. 7 (a) and 7 (b) and the regulated state shown in FIGS. 8 (a) and 8 (b). .. In this example, in the above-mentioned restricted state, the stopper 80 projects toward the first upper transport surface 130A defining the transport path P1 of the seat SH by being engaged with the lock lever 100 as described later, whereby the seat Regulate the passage of SH. The position of the stopper 80 at this time is an example of the first position. Further, in the regulation release state, the stopper 80 is pushed by the tip of the seat SH and rotated from the first position by being released from the engagement by the lock lever 100 and becoming a free state as described later. 1 It retracts upward so as to be away from the upper transport surface 130A, and allows movement of the seat SH to the downstream side, that is, passage of the seat SH. The position of the stopper 80 at this time is an example of the second position. The stopper 80 is supported by the open / close cover 32 together with the holder 51 provided with the separation roller 54 and the paper feed roller 92.

<Electrical configuration of multifunction device>
Next, the electrical configuration of the multifunction device 1 in the present embodiment will be described. As shown in FIG. 9, the main body unit 2 included in the multifunction device 1 is provided with a control unit 110. The control unit 110 includes a well-known CPU 110A, ROM 110B, RAM 110C, NVRAM 110D, an interface unit 110E, and the like. The CPU 110A executes a predetermined process according to a control program stored in the ROM 110B, the RAM 110C, or the like, whereby control for each part of the multifunction device 1 is executed.

The control target by the control unit 110 includes an image forming unit 4, a LAN communication unit 111, an operation panel 40, an image sensor 3S, a sheet transfer sensor 113, a motor 70, a motor 114, a sheet mounting sensor 112, and the like. .. Of these, the image forming unit 4 and the LAN communication unit 111 are provided in the main unit 2. The operation panel 40, the image sensor 3S, and the motor 114 are provided in the FB unit 5. The seat mounting sensor 112, the motor 70, and the seat transfer sensor 113 are provided in the ADF unit 9.

Further, the control unit 110 monitors the signals from the seat mounting sensor 112 and the LAN communication unit 111. The LAN communication unit 111 is composed of a communication interface device corresponding to a wireless LAN and a communication interface device corresponding to a wired LAN. The motor 114 is a power source for moving the image sensor 3S in the FB unit 5 in the left-right direction. The seat mounting sensor 112 is a sensor that detects that the seat SH is mounted on the loading surface 150A. The sheet transport sensor 113 is a sensor that detects that the front end in the transport direction and the rear end in the transport direction of the sheet SH transported by the ADF unit 9 have passed a predetermined detection position in the transport path P1.

<Characteristics of this embodiment>
The first feature of the present embodiment is the transmission path and transmission mode of the driving force generated by the motor 70, which is a common driving source. That is, the transmission path and transmission mode of the driving force from the motor 70 to the first transfer roller 44, the second transfer roller 45, and the paper ejection roller 48, and the transmission path and transmission of the driving force to the separation roller 54 and the paper feed roller 92. The modes are different from each other.

<Transmission of driving force to the transfer roller / paper discharge roller>
First, the transmission of the driving force to the first transport roller 44, the second transport roller 45, and the paper ejection roller 48 will be described with reference to FIGS. 10 and 11.

As shown in FIGS. 10 and 11, the motor 70, the planetary gear mechanism 73, the toothed pulley 74, the belt 75, the toothed pulley 76, the transmission gear 61, and the first gear are contained in the ADF unit 9. The drive gear 44b fixed to the rotating shaft 44a of the transport roller 44, the drive gear 45b fixed to the rotating shaft 45a of the second transport roller 45, the intermediate gear 53, and fixed to the rotating shaft 54S of the separation roller 54. It is provided with a transmission gear 55.

The motor 70 is a motor that does not generate torque when it is not energized, in this example, a stepping motor, and its forward rotation, reverse rotation, and rotation stop are controlled by the control unit 110 described above. Further, the control unit 110 can control the amount of rotation in each direction with respect to the motor 70. In the motor 70, the rotation direction shown in the clockwise direction in FIG. 10 is the rotation direction in the X direction, and the rotation direction shown in the counterclockwise direction is the rotation direction in the Y direction. Then, the rotation of the motor 70 in the X direction is defined as a forward rotation, and the rotation in the Y direction is defined as a reverse rotation. The X direction is an example of the second rotation direction, and the Y direction is an example of the first rotation direction.

The planetary gear mechanism 73 is composed of a sun pulley 78 and a planetary gear 79. The motor 70 is connected to the sun pulley 78 of the planetary gear mechanism 73 via a pulley or belt 72 (not shown). The planetary gear 79 of the planetary gear mechanism 73 is coaxially coupled to a gear (not shown) provided on the sun pulley 78, and rotates and revolves according to the rotation of the sun pulley 78. The position of the planetary gear 79 is switched between a transmission position connected to the toothed pulley 74 and a cutoff position separated from the toothed pulley 74 depending on the rotation direction of the motor 70. The planetary gear mechanism 73 is an example of the first transmission switching mechanism.

<Transmission to the first transport roller, the second transport roller 45, and the paper ejection roller 48>
For example, when the motor 70 rotates in the X direction shown in the figure, the sun pulley 78 also rotates in the X direction. As the sun pulley 78 rotates in the X direction, the planetary gear 79 revolves in the L direction shown while rotating in the X direction. Then, as shown in FIG. 10, when the planetary gear 79 is coupled to the toothed pulley 74 and becomes a transmission position from the above-mentioned cutoff position, the toothed pulley 74 prevents the planetary gear 79 from revolving in the L direction. As a result, the toothed pulley 74 rotates in the X direction as the planetary gear 79 rotates in the X direction. That is, at this transmission position, the driving force of the motor 70 is transmitted to the toothed pulley 74. The driving force associated with the forward rotation of the motor 70 at this time is an example of the second driving force. The rotation of the toothed pulley 74 in the X direction drives the drive shaft 48a connected to the toothed pulley 74, so that the above-mentioned paper ejection roller 48 rotates.

Further, the rotation of the toothed pulley 74 in the X direction is transmitted to the toothed pulley 76 via the transmission belt 75, and the toothed pulley 76 rotates in the X direction. When the toothed pulley 76 rotates in the X direction, the transmission gear 61 that meshes with the pulley 76 rotates in the X direction. As a result, the drive gear 44b and the drive gear 45b meshing with the transmission gear 61 rotate in the X direction, and the rotation shaft 44a fixed to the drive gear 44b rotates to rotate the first transport roller 44 and at the same time. The rotation of the rotating shaft 45a fixed to the drive gear 45b causes the second transport roller 45 to rotate. As a result, the sheet SH sent by the paper feed roller 92 and the separation roller 54 after being set in the supply tray 12 is conveyed. The transfer rollers are not limited to the first transfer roller 44 and the second transfer roller 45, and three or more transfer rollers may be appropriately provided along the transfer path P1. In this case, the second driving force is transmitted from the motor 70 to the transfer rollers other than the first transfer roller 44 and the second transfer roller 45 in the same manner as described above. Further, contrary to the above, only one of the first transfer roller 44 and the second transfer roller 45 may be provided.

Contrary to the above, when the motor 70 rotates in the Y direction, the sun pulley 78 also rotates in the Y direction. The driving force associated with the reversal of the motor 70 at this time is an example of the first driving force. As the sun pulley 78 rotates in the Y direction, the planetary gear 79 revolves in the R direction while rotating in the Y direction. When the planetary gear 79 revolves in the R direction, as shown in FIG. 11, the coupling between the planetary gear 79 and the toothed pulley 74 is disengaged and the above-mentioned driving force transmission path is cut off, so that the first transport roller 44 is cut off. , The driving force of the motor 70 is not transmitted to the second transport roller 45 and the paper ejection roller 48.

<Transmission of driving force to separation roller and paper feed roller>
On the other hand, regardless of whether the planetary gear 79 is in the transmission position or the cutoff position, the intermediate gear 53 is operatively connected to the sun pulley 78 of the planetary gear mechanism 73. That is, the driving force of the motor 70 transmitted to the sun pulley 78 as described above is transmitted to the intermediate gear 53 via the rotation of the sun pulley 78, and the intermediate gear 53 rotates. When the intermediate gear 53 rotates, the intermediate gear 57 operated and connected to the intermediate gear 53 via a gear or pulley (not shown) rotates. The intermediate gear 57 meshes with the transmission gear 55 described above as shown in FIG. 12, which is a cross-sectional view having a cross section different from that of FIGS. 10 and 11, and the transmission gear 55 is rotated by the rotation of the intermediate gear 57. As a result, the rotation shaft 54S of the separation roller 54 rotates. As shown in FIG. 13, when the open / close cover 32 is opened, the rotary shaft 54S and the transmission gear 55 of the separation roller 54 are lifted upward together with the open / close cover 32, and the intermediate gear 57 and the transmission gear 55 mesh with each other. Will be resolved.

For example, when the motor 70 rotates in the X direction and the sun pulley 78 rotates in the X direction, the intermediate gear 53 rotates in the X direction, whereby the intermediate gear 57 and the transmission gear 55 rotate in the X direction. As a result, the separation roller 54 conveys the sheet SH sent from the paper feed roller 92 after being set in the supply tray 12 to the first transfer roller 44 and the second transfer roller 45 on the downstream side. On the contrary, for example, when the motor 70 rotates in the Y direction and the sun pulley 78 rotates in the Y direction, the intermediate gear 53 rotates in the Y direction, whereby the intermediate gear 57 and the transmission gear 55 rotate in the Y direction. The stopper 80 is switched by the rotation of the transmission gear 55 in the Y direction, which will be described later.

<Stopper switching mechanism>
The second feature of the present embodiment is the switching of the state of the stopper 80 by utilizing the transmission of the driving force to the separation roller 54. Hereinafter, the details will be described with reference to FIGS. 7 and 8 and FIGS. 14 to 16 described above.

In FIG. 14, as described above, the separation roller 54 and the paper feed roller 92 are provided in the holder 51, and the holder 51 is swingably supported by the rotating shaft 54S of the separation roller 54. Further, the holder 51 is fed with a shaft gear 154 fixed to the rotary shaft 54S, a planetary gear 153 that can be moved by meshing with the fixed teeth 32a provided on the opening / closing cover 32 while meshing with the shaft gear 154. An intermediate gear 156 that meshes with a shaft gear 157 fixed to the rotating shaft 92S of the roller 92 and an intermediate gear 155 that meshes with the intermediate gear 156 are provided.

As described above, when the above-mentioned second driving force accompanying the rotation of the motor 70 in the X direction is input to the rotation shaft 54S as described above and the rotation shaft 54S rotates in the X direction in FIG. 15A, The planetary gear 153 moves upstream in the transport direction and meshes with the fixed teeth 32a as shown in FIG. 15 (b). The upstream side in the transport direction, which is the moving direction of the planetary gear 153 at this time, is an example of the first direction. As the rotary shaft 54S further rotates in the X direction in this meshed state, the holder 51 swings so that the paper feed roller 92 side is lowered about the rotary shaft center X54 as shown in FIG. 15 (c). .. As a result, the paper feed roller 92 comes into contact with the sheet SH.

As described above with reference to FIGS. 7 and 8, a stopper 80 is provided in the vicinity of the holder 51 in the opening / closing cover 32. The stopper 80 is rotatably supported by the opening / closing cover 32 with the shaft member 80c as the center of rotation, and has a stepped portion 80a and a seat restricting portion 80b. A lock lever 100 is rotatably supported in the vicinity of the paper feed roller 92 in the holder 51. The lock lever 100 is an example of a displacement member. The lock lever 100 is urged in the S direction shown in FIGS. 7 (b) and 8 (b) by an appropriate spring member (not shown). In the state before the holder 51 swings so that the paper feed roller 92 side is lowered as described above, as shown in FIGS. 14, 15 (a) and 15 (b), FIGS. 7 (a) and 7 (a) and 7 (b). As shown in b), the tip portion 100a of the lock lever 100 abuts and engages with the stepped portion 80a. As a result, the rotation of the stopper 80 is prevented and the above-mentioned restricted state is reached. The position of the lock lever 100 at this time is an example of the regulated position.

When the holder 51 rotates around the rotation axis X54 of the rotation shaft 54S in conjunction with the movement of the planetary gear 153 as described above and swings so that the paper feed roller 92 side is lowered as shown in FIG. 15 (c). The contact surface 100b of the lock lever 100 comes into contact with the contact rib 132 provided on the opening / closing cover 32. As a result, the lock lever 100 is displaced so as to rotate in the direction opposite to the S direction as shown in FIGS. 8 (a) and 8 (b). As a result, the tip portion 100a of the lock lever 100 and the stepped portion 80a are disengaged, and the stopper 80 is in a freely rotatable state, that is, in the above-mentioned deregulation state. The position of the lock lever 100 at this time is an example of the open position. Further, the holder 151, the lock lever 100, and the contact rib 132 are examples of the stopper switching mechanism.

After the state shown in FIG. 15 (c), the planetary gear 153 further moves upstream in the transport direction, so that the planetary gear 153 and the fixed teeth 32a are disengaged as shown in FIG. 16 (a). The planetary gear 153 disengaged from the fixed tooth 32a meshes with the intermediate gear 156 as shown in FIG. 16A. As a result, the second driving force from the motor 70 is transmitted to the shaft gear 157 via the rotary shaft 54S, the planetary gear 153, the intermediate gear 155, and the intermediate gear 156, and the paper feed roller 92 rotates to rotate the sheet SH. Is transported to the curved path P1B.

On the other hand, when the above-mentioned first driving force accompanying the rotation from the motor 70 in the Y direction is input to the rotation shaft 54S and the rotation shaft 54S rotates in the Y direction in FIG. Moves to the downstream side in the opposite transport direction and is disengaged from the intermediate gear 155. As a result, the transmission of the driving force from the motor 70 to the paper feed roller 92 is cut off. After that, the planetary gear 153 further moves and meshes with the fixed teeth 32a as shown in FIG. 16 (b). The downstream side in the transport direction, which is the moving direction of the planetary gear 153 at this time, is an example of the second direction. As the rotary shaft 54S further rotates in the Y direction in this meshed state, the holder 51 swings so that the paper feed roller 92 side rises about the rotary shaft center X54 as shown in FIG. 16 (c). .. As a result, the paper feed roller 92 is separated from the sheet SH.

When the holder 51 swings so that the paper feed roller 92 side rises in conjunction with the movement of the planetary gear 153 as described above, the contact surface as described above with reference to FIGS. 8 (a) and 8 (b). The lock lever 100 lifted by the contact of the 100b with the contact rib 132 is displaced so as to rotate in the S direction as shown in FIGS. 7 (a) and 7 (b). As a result, the tip portion 100a of the lock lever 100 and the stepped portion 80a are engaged with each other, and the stopper 80 is in the above-mentioned restricted state. The holder 51, the planetary gear 153, the intermediate gear 155, and the intermediate gear 156 that operate as described above are examples of the second transmission switching mechanism.

<Effect of embodiment>
As described above, the multifunction device 1 of the present embodiment includes transfer rollers 44, 45 for transporting the sheet SH along the transport path P1. Further, the stopper 80 is provided, and the regulation state for restricting the passage of the seat SH in the transport direction is set at the first position, and the regulation release state for permitting the passage of the seat SH in the transport direction is set at the second position.

Switching between the regulated state and the deregulated state of the stopper 80 is performed according to the mode of the input driving force of the motor 70. That is, when the first driving force generated by the rotation of the motor 70 in the Y direction is input, the stopper 80 is in the restricted state at the first position (see FIGS. 7 (a) and 7 (b)). When the second driving force generated by the rotation of the motor 70 in the X direction is input, the stopper 80 is released from the regulation at the second position (see FIGS. 8A and 8B). ).

Similarly, the transmission of the driving force of the motor 70 to the transport rollers 44 and 45 is switched according to the mode of the driving force of the motor 70. That is, when the second driving force is generated by rotating the motor 70 in the X direction, the second driving force is transmitted to the transport rollers 44 and 45 (see FIG. 10), and the motor 70 moves in the Y direction. When the first driving force is generated by rotating to, the driving force is not transmitted to the transport rollers 44 and 45 and is cut off (see FIG. 11).

As described above, in the present embodiment, when the motor 70 rotates in the X direction to generate the second driving force, the stopper 80 is in the deregulated state, the seat SH is allowed to be conveyed, and the second drive is performed. The force is transmitted to the transfer roller, and the sheet SH is transferred by the transfer roller. On the other hand, when the motor 70 rotates in the Y direction to generate the first driving force, the stopper 80 is in a regulated state, the passage of the seat SH in the transport direction is restricted, and the transmission of the driving force to the transport roller is cut off. That is, when some kind of transfer abnormality occurs during sheet SH transfer by the transfer rollers 44, 45 based on the second driving force, the transmission of the driving force to the transfer roller can be cut off by driving the motor 70 in the Y direction. Therefore, even when a stepping motor or the like is used for the motor 70, it can be easily pulled out.

As a result of the above, according to the present embodiment, appropriate switching between the two states of the stopper 80 using the driving force of one motor 70 and smooth withdrawal of the seat SH from the transport rollers 44 and 45 at the time of transport abnormality. And, can be compatible.

Further, in the present embodiment, in particular, the multifunction device 1 is provided with a paper feed roller 92 for feeding out the sheet SH supported by the loading surface 150A, and a separation roller 54 for separating the sheet SH into sheets one by one. At this time, the stopper 80 is provided between the paper feed roller 92 and the separation roller 54. As a result, when the stopper 80 is restricted by the first driving force of the motor 70 and the passage of the seat SH in the transport direction is restricted, it is possible to restrict the seat SH from being inserted into the separation roller 54.

Further, in the present embodiment, in particular, switching of transmission of the driving force of the motor 70 to the paper feed roller 92 is performed according to the mode of the driving force of the motor 70 input to the separation roller 54. That is, when the second driving force generated by the rotation of the motor 70 in the X direction is input to the separation roller 54, the second driving force is transmitted to the paper feed roller 92 and the motor 70 rotates in the Y direction. When the first driving force generated by the above is input to the separation roller 54, the driving force is not transmitted to the paper feed roller 92 and is cut off. Therefore, when some kind of transfer abnormality occurs during sheet SH transfer based on the second driving force, the transmission of the driving force to the paper feed roller 92 can be cut off by driving the motor 70 in the Y direction, and the sheet SH is supplied. It can be smoothly pulled out from the paper roller 92.

Further, in the present embodiment, the holder 51, the planetary gear 153, and the lock lever 100 are particularly provided. As described above, when the second driving force from the motor 70 is input to the rotating shaft 54S of the separation roller 54, the planetary gear 153 moves and is disengaged from the fixed teeth 32a of the holder 51 to the intermediate gear 155. The second driving force is transmitted to the shaft gear 157 of the paper feed roller 92 that meshes with the intermediate gear 155 and is operationally connected to the intermediate gear 155. Further, due to this transmission, the holder 51 swings, the paper feed roller 92 comes into contact with the sheet SH, and the lock lever 100 is displaced from the regulated position to the open position. In this way, the lock lever 100 is displaced to the open position and the stopper 80 is released from the regulated state, so that the stopper 80 is in a free state (pushed by the seat SH and can be switched to the second position). The sheet SH can be transported by the paper roller 92, the separation roller 54, and the transport roller.

When the first driving force from the motor 70 is input to the rotating shaft 54S of the separation roller 54, the planetary gear 153 moves and is disengaged from the intermediate gear 155 to mesh with the fixed teeth 32a of the holder 51. The transmission of the driving force to the paper feed roller 92 is cut off. Further, the holder 51 swings to separate the paper feed roller 92 from the sheet SH, and the lock lever 100 is displaced from the open position to the regulated position. When the lock lever 100 is displaced to the regulated position in this way, the stopper 80 is in a regulated state in which the seat SH can be regulated, and the tip of the inserted seat SH is placed at a predetermined position between the paper feed roller 92 and the separation roller 54. Can be regulated at.

Further, in the present embodiment, in particular, the paper feed roller 92, the separation roller 54, and the opening / closing cover 32 that covers the transport path P1 by the transport rollers are rotatably supported at one end thereof, and can be appropriately rotated. The covered transport path P1 can be exposed to the outside. At this time, the holder 51 provided with the paper feed roller 92 and the separation roller 54 and the stopper 80 are supported by the opening / closing cover 32. As a result, if any transfer abnormality occurs during sheet SH transfer as described above, the opening / closing cover 32 can be rotated as described above to remove the paper feed roller 92, separation roller 54, stopper 80, and the like. The sheet SH can be smoothly removed by separating it from the sheet SH located in the transport path P1.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit and technical idea. Hereinafter, such modification examples will be described step by step. These modifications are also included in the technical scope.

(1) Adjustment of Motor Rotation Amount As described above, the control unit 110 can control the rotation amount of the motor 70 in each direction. At that time, for example, the setting of the rotation amount may be variably set according to the process.

That is, as described above, the control unit 110 can convey the sheet SH by the paper feed roller 92, the separation roller 54, and the transfer rollers 44, 45 by driving the motor 70 in the X direction. Then, after the transfer is completed, the motor 70 is driven in the Y direction to block the transmission of the driving force to the paper feed roller 92 and put the stopper 80 in the above-mentioned restricted state. The process by the control unit 110 at this time is an example of the first process. On the other hand, as described above, the control unit 110 also drives the motor 70 in the Y direction when a transfer abnormality of the sheet SH occurs, and cuts off the transmission of the driving force to the paper feed roller 92. The process by the control unit 110 at this time is an example of the second process.

For example, the control unit 110 makes the amount of rotation of the motor 70 in the Y direction during the first process larger than the amount of rotation of the motor 70 in the Y direction during the second process. This has the following technical significance. That is, since the first process involves switching the state of the stopper 80 from the deregulated state to the regulated state, a relatively large amount of rotation is required. On the other hand, the main purpose of the second process is to cut off the transmission of the driving force to the paper feed roller 92 in order to reduce the load at the time of pulling out, and a relatively small amount of rotation is sufficient. Corresponding to this in this modification, the rotation amount of the motor in the Y direction in each process in the control unit is set to the rotation amount in the first process> the rotation amount in the second process. As a result, it is possible to obtain optimum control without waste that matches the above two processing contents.

In addition, unlike the above, in the control unit 110, for example, the rotation amount of the motor 70 in the Y direction at the time of the first processing and the rotation amount of the motor 70 in the Y direction at the time of the second processing. It may be approximately equal. In this case, there is an effect that the control content can be simplified as compared with the case where the rotation amount is different depending on each process as described above.

(2) Others That is, in the above, the stopper 80 is configured to appear and disappear with respect to the transport path P1 of the sheet SH by rotating, but the present invention is not limited to this. That is, for example, the stopper may be moved up and down by using a solenoid, an electromagnetic clutch, or the like so as to appear and disappear with respect to the transport path P1. In that case, the above-mentioned restricted state is realized by moving the stopper upward (or downward) to the first position located on the transport path P1 side, and the second position farther from the transport path P1 than the first position. A stopper switching mechanism is provided that realizes the above-mentioned deregulation state by moving the stopper downward (or moving upward and downward).
Further, in the above, the case where the rotatable lock lever 100 is provided as the displacement member has been described as an example, but the present invention is not limited to this, and the stopper 80 is opened or in the above-mentioned restricted state in conjunction with the rotation of the holder 51. Anything that can be switched to the state is sufficient. That is, for example, a bar or a plate that moves linearly without rotating and abuts or engages with the stopper 80, such as a lever, may be used as the displacement member.
Further, in the above, the second transmission switching mechanism is configured by the holder 51, the planetary gear 153, the intermediate gear 155, and the intermediate gear 156, but the present invention is not limited to this. That is, the first driving force input from the motor 70 to the separation roller 54, such as a one-way clutch or another appropriate clutch, is transmitted to the paper feed roller 92 and input from the motor 70 to the separation roller 54. It suffices to use a mechanism that cuts off the transmission of the driving force to the paper feed roller 92.

Further, in the above, the swing of the holder 51 is also realized by using the driving force from the motor 70, but the present invention is not limited to this. That is, the holder 51 may be swung by using a driving force from a driving source different from that of the motor 70.
Further, in the above description, the case where the present invention is applied to the document feeding mechanism in the ADF unit 9 when the document is inserted into the ADF unit 9 by the user has been described as an example, but the present invention is not limited to this. That is, the present invention may be applied to a manual feeding mechanism when a recording paper is inserted by a user from a manual feeding port separately provided in the main body unit 2. In this case as well, the same effect as described above is obtained.
Further, the above description has been made by taking the multifunction device 1 as an example of the image processing device, but the present invention is not limited to this. That is, as another example of the image processing device, the present invention may be applied to a reading device having only a portion corresponding to the reading unit 3 without having a portion corresponding to the image forming unit 4 described above. In this case as well, the same effect as described above is obtained.

In addition to the above-mentioned above, the methods according to the above-described embodiment and each modification may be appropriately combined and used.

In addition, although not illustrated one by one, the present invention is carried out with various modifications within a range not deviating from the gist thereof.

1 Multifunction device (an example of image processing device)
32 Open / close cover 44 Conveyor roller 45 Conveyor roller 51 Holder (an example of the second transmission switching mechanism)
51A Fixed tooth 54 Separation roller 54S Rotating shaft 70 Motor 73 Planetary gear mechanism (an example of the first transmission switching mechanism)
80 Stopper 92 Paper feed roller 92S Rotating shaft 100 Lock lever (example of displacement member)
110 Control unit 132 Abutment rib 153 Planetary gear (an example of the second transmission switching mechanism)
155 Intermediate gear (an example of the second transmission switching mechanism)
156 Intermediate gear (an example of the second transmission switching mechanism)
SH sheet P1 transport route

Claims (7)

A motor capable of rotating in the first rotation direction to generate a corresponding first driving force or rotating in a second rotation direction opposite to the first rotation direction to generate a corresponding second driving force.
A transport roller that rotates by transmitting the second driving force from the motor and transports the sheet along the transport path.
A stopper that can be displaced between the first position and the second position that is farther from the transport path than the first position and allows the sheet to pass in the transport direction.
When the first driving force from the motor is input, the stopper is placed in the regulated state of restricting the passage of the seat in the transport direction at the first position, and the second driving force from the motor is input. When this happens, a stopper switching mechanism that puts the stopper in the restricted release state that allows the sheet to move in the transport direction at the second position.
A first transmission switching mechanism that transmits the second driving force from the motor to the transport roller and blocks the transmission of the first driving force from the motor to the transport roller.
An image processing device characterized by comprising. A support surface that supports the sheet and
A paper feed roller that rotates by transmitting the second driving force from the motor and feeds the sheet supported by the support surface in the transport direction.
It is located on the downstream side of the paper feed roller in the transport direction, rotates when the second driving force from the motor is input, and separates the sheets sent out from the paper feed rollers one by one. With Laura,
Equipped with
The stopper is
The image processing apparatus according to claim 1, wherein the image processing apparatus is located between the paper feed roller and the separation roller. The second driving force input from the motor to the separation roller is transmitted to the paper feed roller, and the first driving force input from the motor to the separation roller is transmitted to the paper feed roller. 2. The image processing apparatus according to claim 2, further comprising a second transmission switching mechanism. The second transmission switching mechanism is
A holder that rotatably supports the separation roller and the paper feed roller and swings around the axis of the rotating shaft.
A planetary gear that can move while meshing with the shaft gear of the rotating shaft of the separation roller and meshing with the fixed teeth.
A regulated position provided on the holder and the stopper is set to the regulated state and the stopper is set to the deregulated state as the holder rotates around the axis in conjunction with the movement of the planetary gear. Displacement members that displace between the open position and
Have,
When the second driving force from the motor is input to the rotation shaft of the separation roller, the planetary gear moves in the first direction to disengage from the fixed teeth, and the feeding roller rotates. The planetary gear meshes with an intermediate gear that is actuated and connected to the shaft gear of the shaft, the holder swings, the paper feed roller comes into contact with the sheet, and the displacement member is displaced to the open position.
When the first driving force from the motor is input to the rotation shaft of the separation roller, the planetary gear moves in the second direction opposite to the first direction and is disengaged from the intermediate gear. 3. The image processing according to claim 3, wherein the holder meshes with the fixed teeth, the holder swings, the paper feed roller separates from the sheet, and the displacement member is displaced to the regulated position. Device. It further has an open / close cover that is rotatably supported at one end and covers the paper feed roller, the separation roller, and the transport path by the transport roller.
The open / close cover has the fixed teeth and
The image processing apparatus according to claim 4, wherein the holder provided with the paper feed roller and the separation roller and the stopper are supported by the opening / closing cover. Further having a control unit for controlling the rotation of the motor,
The control unit
After the paper feed roller, the separation roller, and the sheet to be transported by the transfer roller are completely transferred, the motor is driven in the first rotation direction, and the first drive force is driven by the second transmission switching mechanism. The first process of blocking the transmission of the paper feed roller to the rotating shaft and putting the stopper in the restricted state by the stopper switching mechanism.
A second process in which the motor is driven in the first rotation direction when a sheet transfer abnormality occurs, and the transmission of the first driving force to the rotation shaft of the paper feed roller is cut off by the second transmission switching mechanism. ,
And run
4. Item 5. The image processing apparatus according to item 5. Further having a control unit for controlling the rotation of the motor,
The control unit
After the paper feed roller, the separation roller, and the sheet to be transported by the transfer roller are completely transferred, the motor is driven in the first rotation direction, and the first drive force is driven by the second transmission switching mechanism. The first process of blocking the transmission of the paper feed roller to the rotating shaft and putting the stopper in the restricted state by the stopper switching mechanism.
A second process in which the motor is driven in the first rotation direction when a sheet transfer abnormality occurs, and the transmission of the first driving force to the rotation shaft of the paper feed roller is cut off by the second transmission switching mechanism. ,
And run
The amount of rotation of the motor in the first rotation direction in the first processing is the amount of rotation of the motor in the first rotation direction in the first processing to the first rotation direction of the motor in the second processing. The image processing apparatus according to claim 4 or 5, wherein the rotation amount is substantially equal to that of the above-mentioned.

Images