JP2015067434A - Conveyance device and recording device having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a foreign matter removal part to be vibrated while suppressing an increase in cost.SOLUTION: A conveyance device includes a second paper feeding part 1d, a roller pair 23, a foreign matter removal part 42, and a driving part. When a conveyance mode to convey a sheet P is performed, the driving part rotates a paper feeding roller 80 to cause the second paper feeding part 1d to feed the sheet P, moves a lifting plate 81 from a retreat position to a contact position, and rotates an upper roller 23a to cause the roller pair 23 to convey the sheet P. Also, when a vibration mode to vibrate the foreign matter removal part 42 is performed, the driving part moves the lifting plate 81 in a state not to cause the second paper feeding part 1d to feed the sheet P, and in a state not to cause the roller pair 23 to convey the sheet P.

Description

  The present invention relates to a transport apparatus that transports a recording medium and a recording apparatus having the transport apparatus.

  Patent Document 1 describes a recording apparatus that includes a photosensitive member 12 that rotates while being in contact with a recording medium, and a cleaning blade 31 that scrapes off foreign matters such as paper dust attached to the photosensitive member 12. In this recording apparatus, a vibrator 32 that vibrates the cleaning blade 31 is attached to the cleaning blade 31 in order to drop the foreign matter accumulated on the cleaning blade 31.

Japanese Patent Laid-Open No. 6-4014

  In Patent Document 1, a dedicated vibrator for vibrating the cleaning blade 31 (foreign matter removing unit) is used. Therefore, the cost of the apparatus is increased.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a transport apparatus that can vibrate a foreign substance removal unit while suppressing an increase in cost, and a recording apparatus having the transport apparatus.

  The conveying device of the present invention includes a feeding roller that feeds the recording medium, a first position that supports the recording medium and is separated from the feeding roller, and a second position that is closer to the feeding roller than the first position. A feed unit including a movable body movable between the transport unit, and a transport unit including a transport roller that transports the recording medium fed from the feed unit by rotating in contact with the recording medium; A foreign matter including a scraping portion that scrapes off foreign matter adhering to the outer peripheral surface of the transport roller by contacting the outer peripheral surface of the transport roller, and a foreign matter storage portion that stores the foreign matter scraped off by the scraping portion. A removing unit; and a driving unit that drives the feeding unit and the conveying unit. The drive unit rotates the feeding roller to feed the recording medium to the feeding unit when a transport mode for transporting the recording medium is executed, and moves the movable body to the moving body. In order to move from the first position to the second position and transport the recording medium to the transport unit, a vibration mode is executed in which the transport roller is rotated and the foreign matter removing unit is vibrated without transporting the recording medium. When this is done, the moving body is moved.

  A recording apparatus of the present invention includes the above-described transport device and a recording unit configured to record an image on a recording medium.

According to the transport apparatus of the present invention, in the transport mode, since the feed roller and the moving body are driven, the recording medium can be fed. Further, since the conveying roller is rotated, the recording medium fed from the feeding unit can be conveyed. Further, at this time, the foreign matter adhering to the conveying roller can be scraped off by the scraping portion. On the other hand, the moving body is moved in the vibration mode. The foreign substance removal unit can be vibrated by the vibration caused by the movement of the moving body. In this way, as a vibration source for vibrating the foreign substance removing unit, a moving body of the feeding unit is used, and further, the moving unit of the feeding unit is moved in the vibration mode to vibrate the foreign substance removing unit. This eliminates the need for a vibration source and can suppress the cost increase of the apparatus.
According to the recording apparatus of the present invention, the recording apparatus includes a conveying device that can vibrate the foreign substance removing unit while suppressing an increase in cost.

1 is a perspective view showing an ink jet printer according to an embodiment of a recording apparatus having a transport device according to the present invention. It is a schematic side view which shows the internal structure of the printer shown in FIG. FIGS. 3A and 3B are perspective views showing the tray unit shown in FIG. 2, in which FIG. 2A shows a state where the sub-tray is in the storage position and the extension plate is folded, and FIG. Indicates the state. (A) is sectional drawing of the tray unit along the IVa-IVa line of FIG. 3 (a), (b) is sectional drawing of the tray unit along the IVb-IVb line of FIG.3 (b). is there. It is a principal part perspective view of the 2nd paper feed part vicinity of the paper feed roller. (A) is a perspective view which shows the condition where a raising / lowering board exists in a retracted position, (b) is a perspective view which shows the condition where an raising / lowering board exists in a contact position. 4A and 4B are side views of a main part in the vicinity of a sheet feeding roller of a second sheet feeding unit, in which FIG. 5A shows a state where the lifting plate is in the retracted position, and FIG. FIG. 2 is a block diagram illustrating an electrical configuration of a printer. It is the schematic which shows the transmission mechanism of a drive part, (a) shows the state at the time of the 2nd conveyance mode which conveys a sheet | seat from a 2nd paper feeding part, (b) shows the state at the time of vibration mode, (C) shows a state in the first transport mode in which the paper is transported from the first paper feeder. 4A and 4B are schematic diagrams illustrating an operation state of a foreign matter removing unit, in which FIG. 4A illustrates a state in a first transport mode in which a sheet is transported from a first sheet feeding unit, and FIG. The state at the time of the 2nd conveyance mode which conveys is shown, (c) shows the state at the time of vibration mode. It is a block diagram which shows the electric constitution of the printer of a modification.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  First, an overall configuration of an ink jet printer 1 as an embodiment of a recording apparatus having a transport apparatus according to the present invention will be described with reference to FIGS. 1 and 2.

  The printer 1 has a rectangular parallelepiped casing 1a. A paper discharge unit 1e is provided on the top plate of the housing 1a. A first paper feed unit 1c is provided in a lower space in the housing 1a. The paper feed tray 20 of the first paper feed unit 1c can be attached to and detached from the housing 1a in the sub-scanning direction (the left and right direction in FIG. 2). A second paper feeding unit 1d (feeding unit) is provided on the front surface of the housing 1a (the surface on the left front side in FIG. 1 and the surface on the left side in FIG. 2). The tray unit 70 of the second paper feed unit 1d can be opened and closed with respect to the housing 1a, and can support the paper P in the opened state (see FIG. 3).

  In the housing 1a, there are a first paper feed unit 1c, a second paper feed unit 1d, a transport mechanism 40, a foreign matter removal unit 42, a drive unit 45 (see FIG. 8), a sensor 91 (see FIG. 8), and two heads. 10, two platens 50, two cartridges (not shown) respectively corresponding to the two heads 10, and a control unit 100 for controlling each part of the printer 1 are arranged. The transport apparatus in the present embodiment includes a first paper feed unit 1c, a second paper feed unit 1d, a transport mechanism 40, a foreign matter removing unit 42, a drive unit 45 for driving them, and a control for controlling the drive unit 45. Part of the unit 100 is configured.

  Based on a recording command supplied from an external device (such as a PC connected to the printer 1), the control unit 100 prepares for recording so that an image is recorded on the paper P, and supplies, conveys, and feeds the paper P. It controls the discharge operation, the liquid discharge operation synchronized with the conveyance of the paper P, and the like. In addition to a central processing unit (CPU) that is an arithmetic processing unit, the control unit 100 includes a read only memory (ROM), a random access memory (RAM), an application specific integrated circuit (ASIC), and an I / F. (Interface), I / O (Input / Output Port), timer, etc. are included. The ROM stores programs executed by the CPU, various fixed data, and the like. The RAM temporarily stores data (for example, image data) necessary for executing the program. The ASIC performs rewriting and rearrangement of image data (for example, signal processing and image processing). The I / F performs data transmission / reception with an external device. I / O inputs / outputs detection signals of various sensors. Note that the control unit 100 may not include the ASIC, and image data may be rewritten or rearranged by a program executed by the CPU.

  The first paper feed unit 1 c includes a paper feed tray 20 and a paper feed roller 21. The paper feed tray 20 is a box whose upper surface is open, and can accommodate a plurality of papers P. The paper feed roller 21 is connected to a paper feed motor 21M (see FIG. 8) via a transmission mechanism 45a. The paper feed roller 21 is rotated by driving the paper feed motor 21 </ b> M under the control of the control unit 100, and sends out the uppermost paper P among the plurality of papers P stored in the paper feed tray 20.

  As shown in FIG. 2, the two heads 10 (recording units) are spaced apart from each other in the sub-scanning direction, and a precoat head that discharges the pretreatment liquid sequentially from the upstream side in the transport direction of the paper P, and , An inkjet head that discharges black ink. The heads 10 have the same structure as each other, are long in the main scanning direction (the direction perpendicular to the paper surface in FIG. 2), and have a substantially rectangular parallelepiped outer shape. The lower surface of the head 10 is a discharge surface 10a in which a large number of discharge ports are opened. Inside the head 10, there is formed a flow path from the pretreatment liquid or black ink supplied from the cartridge (which may be collectively referred to as “liquid”) to the discharge port. The pretreatment liquid is a liquid having a function of preventing ink bleeding and back-through and a function of improving ink color development and quick drying. Here, the sub-scanning direction is the direction in which the paper P is conveyed at the recording position (position facing the ejection surface 10a). The main scanning direction is a direction parallel to the ejection surface 10a and perpendicular to the sub-scanning direction.

  The two platens 50 respectively correspond to the two heads 10 and have support surfaces 50a that support the paper P while facing the ejection surfaces 10a in the vertical direction.

  The transport mechanism 40 defines a path through which the paper P is transported. The path includes paths R1, R2, and R3 from the first paper feeding unit 1c to the paper discharge unit 1e through the recording position. The transport mechanism 40 includes the following components that define the path. The transport direction is the moving direction of the paper P transported along the paths R1, R2, R3 and the path U described later.

  The path R1 is a path from the first paper feed unit 1c to the recording position, and is defined by the guide 31a, the roller pair 22, the guide 31b, the roller pair 23, the guide 31c, the guide 31d, and the roller pair 24. These components are arranged in this order from the upstream side in the transport direction (the direction indicated by the dotted thick arrow).

  The path R2 is a path that passes through the recording positions of the two heads 10, and is defined by the guide 32a, the pressing roller 33, and the roller pair 25. The guide 32 a, the pressing roller 33, and the roller pair 25 are disposed between the two heads 10. The pressing roller 33 and the roller pair 25 are arranged in this order from the upstream side in the transport direction.

  The path R3 is a path from the recording position to the paper discharge unit 1e, and is defined by the guides 32b, 33a, 33b, the pressing roller 35, and the roller pairs 26, 27, 28. The roller pairs 26 to 28 are arranged in this order from the upstream side in the transport direction. A plurality of pressing rollers 35 are provided along the path R3.

  Each of the roller pairs 22 to 28 includes a driving roller connected to the conveyance motor 40M (see FIG. 8) via the transmission mechanism 45b and a driven roller that rotates as the driving roller rotates. Each of the roller pairs 22 to 28 conveys the paper P by rotating while pinching the paper P in a pressure contact state. Each of the guides 31a to 31d, 32a, 32b, 33a, and 33b is formed of a member that is disposed so as to form a gap that becomes a conveyance path.

  The roller pair 23 is provided with a foreign substance removing unit 42 described later. The roller pair 23 (conveying unit) includes an upper roller 23a and a lower roller 23b. The upper roller 23a is made of an easily charged material such as a fluororesin on the outer peripheral surface, and adsorbs foreign matter (foreign matter such as paper dust) adhering to the paper P. The upper roller 23a is connected to the transport motor 40M through a part of the transmission mechanism 45b. The lower roller 23b is a driven roller that is made of rubber or the like and rotates with the rotation of the upper roller 23a that is a driving roller.

  The second paper feed unit 1d includes a tray unit 70, a paper feed roller 80, an elevating plate 81, and a separation mechanism 85, and defines a path U from the opened tray unit 70 to the downstream portion in the transport direction of the path R1. The path U is defined by the paper feed roller 80, the lifting plate 81, and the separation pad 85a of the separation mechanism 85. The paper feed roller 80 and the lifting plate 81 are connected to the transport motor 40M through a part of the transmission mechanism 45b.

  Under the control of the control unit 100, the paper P sent out from the paper feed tray 20 by the paper feed roller 21 is conveyed along the paths R1 to R3 and is discharged to the paper discharge unit 1e. Alternatively, under the control of the control unit 100, the paper P sent out from the open tray unit 70 by the paper feed roller 80 is transported along the path U, the downstream portion in the transport direction of the path R1, and the paths R2 and R3. Then, it is discharged to the paper discharge unit 1e. When the paper P sequentially passes directly under the head 10 (recording position) while being supported on the support surface 50a, each head 10 is driven by the control of the control unit 100, and is directed from the discharge port of the discharge surface 10a toward the paper P. Thus, an image is formed on the paper P by discharging the liquid.

  Next, the tray unit 70 of the second paper feed unit 1d will be described in detail with reference to FIGS. As shown in FIG. 3, the tray unit 70 includes a main tray 71, a sub-tray 72, and a cover 73.

  The tray unit 70 can be opened and closed with respect to the housing 1a, and can be in a closed state (the state shown in FIGS. 1 and 2) and an open state (the state shown in FIGS. 3, 4, and 7). 3 and 4, the housing 1a is not shown. The closed state of the tray unit 70 means a state in which the trays 71 and 72 are accommodated in the housing 1a. The open state of the tray unit 70 means a state in which the trays 71 and 72 are exposed outside the housing 1a. The tray unit 70 can accommodate a plurality of sheets P in the open state. The paper P stored in the tray unit 70 is conveyed toward the recording position by the paper supply roller 80. The transport direction of the paper P supported by the tray unit 70 is an arrow A direction shown in FIGS.

  The main tray 71 is substantially flat and includes a front surface 71a, a back surface 71b (see FIG. 4), and a pair of side surfaces 71c. The front surface 71a is a surface on which the paper P is supported. The front surface 71a is a vertically upward surface when the tray unit 70 is opened. The back surface 71b is a surface opposite to the front surface 71a. The pair of side surfaces 71 c are surfaces that connect the front surface 71 a and the back surface 71 b and are both surfaces in the width direction of the main tray 71. Here, the width direction of the main tray 71 is a direction parallel to the surface 71a and orthogonal to the transport direction. A pair of side plates 71 d slidable in the width direction is attached to the main tray 71. The paper P is disposed in a region between the pair of side plates 71d on the front surface 71a. By sliding the pair of side plates 71d, the width of the paper P of various sizes and the distance between the pair of side plates 71d can be matched.

  The main tray 71 is provided with a pair of arms 71e. A shaft hole 71f is formed at the end of each arm 71e. The housing 1a has a pair of convex portions 1ax (see FIG. 4) that can be inserted into the pair of shaft holes 71f. The main tray 71 is supported by the housing 1a so as to be rotatable about the convex portion 1ax by inserting the pair of convex portions 1ax into the pair of shaft holes 71f.

  The main tray 71 is provided with a pair of convex portions 71p. The pair of convex portions 71p protrudes outward in the width direction from each of the pair of side surfaces 71c of the main tray 71. The cover 73 has a pair of guide holes 74a into which the pair of convex portions 71p are slidably inserted. The main tray 71 is supported by the cover 73 by inserting each of the pair of convex portions 71p into the pair of guide holes 74a.

  The sub-tray 72 has a substantially flat plate shape, and includes a front surface 72a, a back surface 72b (see FIG. 4), and a pair of side surfaces 72c (see FIG. 3B), and a storage position (FIGS. 3A and 4A). ) And a drawing position (position shown in FIGS. 3B and 4B). As shown in FIG. 4A, when the sub-tray 72 takes the storage position, the front surface 72a faces the back surface 71b. As shown in FIG. 4B, when the sub-tray 72 is in the drawing position, the front surface 72a is not opposed to the back surface 71b and is continuous with the front surface 71a. The front surface 72a is a surface on which the paper P is supported. The front surface 72a is a vertically upward surface when the tray unit 70 is open. The back surface 72b is a surface opposite to the front surface 72a. The pair of side surfaces 72c are surfaces that connect the front surface 72a and the back surface 72b, and are both surfaces in the width direction of the sub-tray 72 (direction orthogonal to the transport direction). The pair of side surfaces 72c are surfaces along the transport direction.

  An extension plate 72d is attached to the sub-tray 72. A recess 72x that can accommodate the extension plate 72d is formed on the surface 72a. The sub-tray 72 is provided with a pair of holes 72q. The extension plate 72d has a substantially flat plate shape and is provided with a pair of convex portions 72p. The pair of convex portions 72p protrudes outward in the width direction of the extension plate 72d at each of both ends in the width direction of the extension plate 72d. The extension plate 72d has a pair of convex portions 72p inserted into the pair of holes 72q. Accordingly, the extension plate 72d is supported by the sub-tray 72 so as to be rotatable about the convex portion 72p. The extension plate 72d can take the folded state shown in FIG. 3 (a) and the unfolded state shown in FIG. 3 (b) by the rotation. The extension plate 72d is accommodated in the recess 72x when in the folded state.

  As shown in FIG. 4, the sub-tray 72 is provided with a pair of convex portions 72e. The pair of convex portions 72e protrude outward in the width direction from each of the pair of side surfaces 72c of the sub-tray 72. The pair of convex portions 72e are disposed at the end portions on the downstream side in the transport direction of the pair of side surfaces 72c of the sub-tray 72. The cover 73 has a pair of guide holes 74b into which the pair of convex portions 72e are slidably inserted (see FIG. 4). The sub-tray 72 is supported by the cover 73 by inserting each of the pair of convex portions 72e into the pair of guide holes 74b.

  The cover 73 has a substantially flat plate shape, and a pair of side walls 73d are erected on the surface 73a. Each side wall 73d is provided in the vicinity of the end of the cover 73 in the width direction. The trays 71 and 72 are sandwiched between the pair of side walls 73d. The pair of side walls 73d define a pair of guide holes 74a and 74b, respectively.

  A pair of convex portions 73p is provided at the end of the cover 73 on the downstream side in the conveyance direction. The pair of convex portions 73p protrude outward in the width direction of the cover 73 at each of both ends in the width direction of the cover 73. The housing 1a has a pair of recesses (not shown) into which each of the pair of protrusions 73p can be inserted. The cover 73 is supported by the housing 1a so as to be rotatable about the pair of convex portions 73p by inserting each of the pair of convex portions 73p into the pair of concave portions of the housing 1a. That is, the tray unit 70 is supported by the housing 1a at a total of four locations including the pair of shaft holes 71f and the pair of convex portions 73p.

  When such a tray unit 70 is in the closed state, the sub-tray 72 takes the storage position (see FIGS. 3A and 4A). The extension plate 72d is in a state of being accommodated in the recess 72x of the sub-tray 72. When the tray unit 70 is rotated from the closed state to the opened state, the trays 71 and 72 are interlocked with the rotation of the cover 73 and are rotated in the same direction as the rotation direction of the cover 73. The cover 73 rotates around the pair of convex portions 73p. At this time, the main tray 71 rotates around the pair of shaft holes 71f with the sub-tray 72 held in the storage position. At this time, each of the pair of convex portions 71p slides in the pair of guide holes 74a.

  When the tray unit 70 is in the open state, the user pulls out the sub-tray 72 in the storage position and places it in the pull-out position according to the size of the paper P supported by the tray unit 70, or places the sub-tray in the pull-out position. 72 can be placed in the storage position. When the sub-tray 72 is in the pull-out position, the user changes the extension plate 72d from the folded state to the expanded state (see FIG. 3B) or from the expanded state to the folded state. be able to.

  Next, the paper feed roller 80, the lifting plate 81, and the separation mechanism 85 of the second paper feed unit 1d will be described in detail with reference to FIGS. The paper feed roller 80 is supported by a shaft 80a (a part of the drive unit 45) extending in the main scanning direction, and is disposed at a position where it can contact the center of the paper P in the width direction (main scanning direction). Yes. The paper feed roller 80 is composed of a cylindrical rubber roller, and a one-way clutch 89 (a part of the drive unit 45) is disposed between the paper feed roller 80 and the shaft 80a. The one-way clutch 89 is a well-known one and supplies the rotational force of the shaft 80a only in the direction (the counterclockwise direction in FIGS. 7 and 9) that rotates when the paper feed roller 80 transports the paper P in the transport direction. This is transmitted to the paper roller 80. The housing 1a includes two frames 1a1 and 1a2 as shown in FIG. These two frames 1a1 and 1a2 are fixed to each other by screws. The frame 1a1 has a pair of ribs 1a3 at positions where the paper feed roller 80 is sandwiched in the main scanning direction. The shaft 80a is rotatably supported by the pair of ribs 1a3. Further, as shown in FIG. 5, the shaft 80a extends leftward from the left rib 1a3, and a disc cam 80b (a part of the drive unit 45) is fixed to the left end thereof. Yes.

  As shown in FIG. 6, the lifting plate 81 (moving body) has two long plates 81 a and 81 b extending in the main scanning direction. The two long plates 81a and 81b are connected to each other at their long sides so as to be bent into a square shape. The long plate 81a is disposed upstream of the long plate 81b in the transport direction of the paper P. A pair of flanges 81a1 are formed at both ends of the long plate 81a in the main scanning direction. Each flange 81a1 has a hole 81a2. The projections 1a4 of the frame 1a2 are inserted into these holes 81a. Thereby, the elevating plate 81 is supported by the frame 1a2 so as to be rotatable about the protrusion 1a4. At the center of the long plate 81b in the main scanning direction, a convex portion 81b1 protruding toward the paper feed roller 80 side is formed. A cork may be attached to the convex portion 81b1. Further, a through hole 81b4 is formed at a position close to the convex portion 81b1 of the long plate 81b. As shown in FIG. 5, the through-hole 81b4 is arranged so that the arm 92 of the sensor 91 can be inserted. At one end (the left end in FIG. 6) of the long plate 81b in the main scanning direction, an abutting portion 81b2 capable of abutting on the disc cam 80b is formed. Further, two attachment portions 81b3 are formed in the vicinity of both ends of the long plate 81b in the main scanning direction. As shown in FIG. 5, the lower end of the urging member 81b4 whose upper end is attached to the frame 1a1 is attached to these attachment portions 81b3. Thereby, the elevating plate 81 is urged in a direction in which the convex portion 81 b 1 approaches the paper feed roller 80. In addition, although the coil spring is used for the urging member 81b4 in the present embodiment, for example, an elastic member such as rubber may be used to urge the convex portion 81b1 of the elevating plate 81 in a direction approaching the paper feed roller 80. As long as this is possible, any biasing member may be used.

  When the disc cam 80b is located at the position shown in FIG. 6A, the lifting plate 81 has a portion of the outer peripheral surface of the disc cam 80b (a portion that comes into contact with the contact portion 81b2) that is most exposed from the shaft 80a. When approaching the contact portion 81b2, the convex portion 81b1 is disposed at the retracted position (first position: see FIG. 7A) farthest from the paper feed roller 80. In other words, when the portion of the outer peripheral portion of the disc cam 80b that is farthest from the shaft 80a faces the contact portion 81b2, the elevating plate 81 is disposed at the retracted position. As the circular plate cam 80b rotates from the position shown in FIG. 6A, the abutting plate 81 approaches the shaft 80a and the convex portion 81b1 approaches the paper feed roller 80 from the retracted position. More specifically, when the disc cam 80b rotates about 100 ° counterclockwise from the position shown in FIG. 6A, the contact position (second position) where the convex portion 81b1 contacts the outer peripheral surface of the paper feed roller 80. : See FIG. 6B and FIG. 7B), the elevating plate 81 starts to be arranged. The leading end of the paper P stored in the opened tray unit 70 is supported by the elevating plate 81. Therefore, the leading end portion of the paper P is pressed against the paper feed roller 80 by the elevating plate 81. At this time, when the paper feed roller 80 rotates, the paper P is sent out in the transport direction. While the convex portion 81b1 of the elevating plate 81 is in contact with the paper feed roller 80 (from about 100 ° to less than about 220 ° from the position shown in FIG. During rotation, the contact portion 81b2 is separated from the disc cam 80b.

  As shown in FIG. 7, the separation mechanism 85 includes a separation pad 85a, a support frame 85b that supports the separation pad 85a, and an urging member 85c. The separation pad 85a (resistance imparting member) is disposed downstream of the lifting plate 81a in the transport direction of the paper P and at a position facing the paper feed roller 80. As shown in FIG. 7, the support frame 85 b is curved so as to bypass the moving range of the long plate 81 b of the elevating plate 81. One end of the support frame 85b is fixed to the housing 1a, and a separation pad 85a is attached to the other end. That is, the support frame 85b is cantilevered by the housing 1a and supports the separation pad 85a so that it can be displaced. The biasing member 85c is disposed at a position between the paper feed roller 80 and the other end of the separation pad 85a and the support frame 85b, and biases the separation pad 85a toward the paper feed roller 80 via the support frame 85b. To do. The biasing member 85c in the present embodiment also uses a coil spring. However, for example, an elastic member such as rubber may be used, and if the separation pad 85a can be biased in a direction approaching the paper feed roller 80, Any urging member may be used. The separation pad 85a is preferably composed of a member having a high coefficient of friction such as cork or rubber. When the separation pad itself is elastic, the urging member may not be provided.

  In this configuration, even when the paper feed roller 80 rotates and a plurality of papers P accommodated in the opened tray unit 70 are multi-fed, the paper P in contact with the paper feed roller 80 mainly goes to the path R1. Be transported. At this time, another sheet P under the sheet P, which is double-fed, receives a conveyance resistance in a direction opposite to the conveyance direction (the direction in which the sheet P is conveyed by the sheet feed roller 80) by the separation pad 85a. . For this reason, only one sheet P among the plurality of sheets P that are double-fed is conveyed to the path R1.

  The sensor 91 is provided in the second paper feed unit 1d. This sensor 91 has an arm 92 shown in FIG. The arm 92 extends downward and is disposed so as to be rotatable about its upper end. When the lifting plate 81 does not support the paper P (the paper P is not accommodated in the opened tray unit 70). At the time of insertion) into the through hole 81b4. The arm 92 contacts the paper P when the elevating plate 81 supports the paper P, that is, when the paper P is stored in the tray unit 70, and rotates so as to exit from the through hole 81b4. . The sensor 91 outputs a signal to the control unit 100 only when the arm 92 comes out of the through hole 81b4. Based on this signal, the control unit 100 determines whether or not the sheet P is accommodated in the opened tray unit 70 and the elevating plate 81 supports the sheet P. A buzzer 95 (see FIG. 8) is provided in the housing 1a. Under the control of the control unit 100, the buzzer 95 (notification unit) notifies the user that the sheet P is not stored in the opened tray unit 70.

  Next, the foreign matter removing unit 42 will be described below with reference to FIG. As shown in FIG. 7, the foreign matter removal unit 42 includes a sponge 43 and a foreign matter storage box 44. The sponge 43 (scraping portion) is made of a material that easily charges the upper roller 23a, such as urethane foam, and is in pressure contact with the upper roller 23a. The foreign matter storage box 44 (foreign matter storage portion) is formed integrally with the frame 1a1, has a vertical portion 44a and an inclined portion 44b having a substantially L-shaped cross section, and stores the upper roller 23a and the sponge 43. A part of the upper roller 23 a is exposed to the outside from a portion facing the lower roller 23 b of the foreign matter storage box 44. The inclined portion 44b is inclined along a straight line connecting a contact portion between the paper feed roller 80 and the separation pad 85a and a contact portion between the upper roller 23a and the lower roller 23b, and a part of the downstream portion of the path R1 is formed. It also serves as a guide to prescribe. A support portion 44b1 (see FIG. 10) that supports the sponge 43 is formed at the end of the inclined portion 44b on the upper roller 23a side. Further, the foreign matter storage box 44 is formed on the opposite side of the pair of ribs 1a3 of the frame 1a1 with respect to the transport direction of the paper P.

  When the upper roller 23a rotates in this configuration, the outer peripheral surface of the upper roller 23a is charged by sliding with the sponge 43. When the outer peripheral surface of the upper roller 23a is charged, foreign matters such as paper dust adhering to the paper P sandwiched between the roller pair 23 are attracted to the outer peripheral surface of the upper roller 23a. The foreign matter adsorbed on the outer peripheral surface of the upper roller 23 a is scraped off from the outer peripheral surface of the upper roller 23 a by the sponge 43 and stored in the foreign matter storage box 44. In the present embodiment, the sponge 43 is employed in order to constitute both a charging unit for charging the outer peripheral surface of the upper roller 23a and a scraping unit for scraping off foreign matter from the outer peripheral surface. However, as long as both the charging unit and the scraping unit can be configured, the charging unit and the scraping unit may be configured from other than the sponge.

  Next, the drive part 45 is demonstrated below, referring FIG.8 and FIG.9. As shown in FIG. 8, the drive unit 45 includes a paper feed motor 21M and a transport motor 40M connected to the control unit 100, and two transmission mechanisms 45a and 45b. The transmission mechanism 45a includes a plurality of gears meshed with each other and a plurality of shafts that support each of the gears, and transmits the rotational force from the paper feed motor 21M to the paper feed roller 21.

  As shown in FIG. 9, the transmission mechanism 45b includes seven gears 46a1 to 46a7, seven shafts 46b1 to 46b6 and 80a that support the gears 46a1 to 46a7, two solenoids 47 and 48, and a connecting plate. 49, the above-described disc cam 80b, and the above-described one-way clutch 89. The transmission mechanism 45b transmits the rotational force from the transport motor 40M to the gear 46a4, and transmits the rotational force from the transport motor 40M to a plurality of gears and shafts (not shown) and the driving rollers of the roller pairs 22, 24-28. A plurality of gears and shafts not shown are also included.

  The upper roller 23a and the gear 46a1 are fixed to the shaft 46b1. That is, when the gear 46a1 rotates, the upper roller 23a rotates. The gear 46a2 is rotatably supported by the housing 1a via the shaft 46b2 in a state where the gear 46a2 is engaged with the gear 46a1. The gear 46a4 is rotatably supported by the housing 1a via the shaft 46b4 in a state where the gear 46a4 is engaged with the two gears 46a3 and 46a5. Further, the gear 46a4 is arranged to mesh with a gear (not shown) that transmits the rotational force of the transport motor 40M. The two gears 46a3 and 46a5 are arranged to be movable around the gear 46a4 by an L-shaped connecting plate 49.

  The gear 46a6 is rotatably supported by the solenoid 47 via the shaft 46b6. The solenoid 47 moves the gear 46a6 between the first transmission position (position shown in FIG. 9A) and the separation position (position shown in FIG. 9C). At the first transmission position, as shown in FIG. 9A, the gear 46a6 meshes with the gear 46a7, and the rotational force of the gear 46a5 can be transmitted to the gear 46a7. In the separated position, as shown in FIG. 9C, the gear 46a6 is separated from the gear 46a7, and the rotational force of the gear 46a5 cannot be transmitted to the gear 46a7.

  The shaft 80 a supports a gear 46 a 7 and a paper feed roller 80 via a one-way clutch 89. That is, when the shaft 80a rotates counterclockwise in FIG. 9 due to the rotation of the gear 46a7, the paper feed roller 80 also rotates counterclockwise in FIG. That is, the paper feed roller 80 rotates to feed the paper P in the transport direction. On the other hand, when the shaft 80a rotates clockwise by the rotation of the gear 46a7, the paper feed roller 80 is not rotated by the one-way clutch 89, and only the shaft 80a rotates.

  The solenoid 48 is connected to the connection plate 49, and the connection plate 49 is centered on the shaft 46b4 and the connection plate 49 is moved to the second transmission position (position shown in FIG. 9A) and the third transmission position (position shown in FIG. 9B). ). At the second transmission position, as shown in FIG. 9A, the gear 46a3 meshes with the gear 46a2, the gear 46a5 meshes with the gear 46a6 at the first transmission position, and the rotational force of the transport motor 40M is applied to the shafts 46b1 and 80a. It becomes a state (first state) in which transmission is possible. At this time, the gears 46a1 and 46a7 rotate counterclockwise in FIG. For this reason, the upper roller 23a and the paper feed roller 80 together with the shafts 46b1 and 80a rotate counterclockwise in FIG. 9 (that is, the direction in which the paper P is transported in the transport direction). At the third transmission position, as shown in FIG. 9B, the gear 46a3 meshes with the gear 46a7 while being separated from the gear 46a2, the gear 46a5 is separated from the gear 46a6 at the first transmission position, and the conveyance motor 40M rotates. This is a state where the force can be transmitted only to the shaft 80a (that is, the second state where the rotational force is not transmitted to the roller pair 23). At this time, the gear 46a7 rotates in the opposite direction (clockwise in FIG. 9) to that in the second transmission position. Therefore, the feed roller 80 does not rotate, and only the shaft 80a rotates clockwise in FIG. As described above, the transmission mechanism 45b includes the gear 46a3, the shaft 46b3, the connecting plate 49, and the solenoid 48, and includes the changing mechanism 51 that can change the state of transmitting the rotational force of the transport motor 40M to the upper roller 23a. By having such a change mechanism 51, whether or not to rotate the upper roller 23a can be realized with a simple configuration.

  When the shaft 80a rotates forward (counterclockwise in FIG. 9) and reversely (clockwise in FIG. 9), the disc cam 80b also rotates in the same direction as the shaft 80a. For this reason, the elevating plate 81 moves between the contact position and the retracted position. In this way, the elevating plate 81 moves, and vibration is generated when the elevating plate 81 and the paper feed roller 80 come into contact (including the case where the paper P is held between them). This vibration is also propagated to the frame 1a1, that is, the foreign matter storage box 44 through the shaft 80a. Further, the vibration propagates to the sponge 43 through the support portion 44b1. By the propagation of this vibration, it becomes possible to smooth out the foreign matter in the foreign matter storage box 44 as will be described later.

  Next, the operation status of the foreign matter removing unit 42 in the transport mode and the vibration mode will be described below with reference to FIGS. 7, 9, and 10. In the printer 1 of the present embodiment, the transport mode is executed when the paper P is transported from either the first paper feed unit 1c or the second paper feed unit 1d toward the paper discharge unit 1e. In the present embodiment, the transport mode when transporting the paper P from the first paper feed unit 1c toward the paper discharge unit 1e is referred to as a first transport mode. Further, the transport mode when transporting the paper P from the second paper feed unit 1d toward the paper discharge unit 1e is referred to as a second transport mode. Table 1 shows the paper feed motor 21M, the transport motor 40M, the connecting plate 49, the gear 46a6, the paper feed roller 21, the paper feed roller 80, and the upper roller 23a in each of the first transport mode, the second transport mode, and the vibration mode. And the state of the raising / lowering board 81 is shown.

  The control unit 100 drives the paper feed motor 21M and the conveyance motor 40M when conveying the paper P from the first paper supply unit 1c based on the recording command, and as shown in FIG. 9C, the gear 46a6. The solenoids 47 and 48 are controlled so that the connecting plate 49 takes the second transmission position at the separated position. The user can select either the first transport mode or the second transport mode according to the paper type, image data, or the like.

  In this way, in the first transport mode in which the paper P is transported from the first paper feed unit 1c, the paper feed roller 21 is rotated by the drive of the paper feed motor 21M, and the roller pairs 22, 24-28 are driven by the drive of the transport motor 40M. Rotate. At this time, the connecting plate 49 takes the second transmission position, whereby the rotational force of the transport motor 40M is transmitted to the upper roller 23a, and the roller pair 23 also rotates. In this way, the paper P is sent out by the paper feed roller 21, is conveyed along the paths R1 to R3, and is discharged to the paper discharge unit 1e. Note that when the paper P is transported along the path R2, that is, when the paper P passes through a position facing the head 10, an image is recorded by the head 10. At this time, since the outer peripheral surface of the upper roller 23a is charged by the sponge 43, the foreign matter adhering to the paper P sandwiched between the roller pair 23 is attracted to the outer peripheral surface of the upper roller 23a. The adsorbed foreign matter (indicated by hatching in FIG. 10) is scraped off from the outer peripheral surface of the upper roller 23a by the sponge 43 and stored in the foreign matter storage box 44, as shown in FIG. At this time, as shown in FIG. 9C, the gear 46a6 takes a separation position, so that the rotational force of the transport motor 40M is not transmitted to the gear 46a7. For this reason, the paper feed roller 80 and the lifting plate 81 are not driven.

  Based on the recording command, the control unit 100 determines whether a signal is output from the sensor 91 to the control unit 100 when the paper P is transported from the second paper feed unit 1d. That is, it is determined whether or not the sheet P is accommodated in the opened tray unit 70 and the lifting plate 81 supports the sheet P. When a signal is output from the sensor 91, it is determined that the paper P is supported by the lifting plate 81, the transport motor 40M is driven, and the gear 46a6 is connected to the first gear 46a6 as shown in FIG. The solenoids 47 and 48 are controlled so that the connecting plate 49 takes the second transmission position at the first transmission position. On the other hand, if no signal is output from the sensor 91, the control unit 100 controls the buzzer 95 to notify the user that the paper P is not stored in the tray unit 70.

  In this way, in the second transport mode in which the paper P is transported from the second paper feed unit 1d, the roller pairs 22, 24 to 28 are rotated by driving the transport motor 40M. At this time, when the gear 46a6 is in the first transmission position and the connecting plate 49 is in the second transmission position, the rotational force of the transport motor 40M is transmitted to the gears 46a1 and 46a7 as shown in FIG. 9A. The paper feed roller 80 and the upper roller 23a rotate counterclockwise in FIG. At this time, the disc cam 80b also rotates with the rotation of the shaft 80a. Therefore, the leading end portion of the paper P stored in the opened tray unit 70 is pressed against the paper feed roller 80 by the elevating plate 81. In this way, the paper P is sent out by the paper feed roller 80, conveyed along the downstream portion of the path R1 and the paths R2 and R3, and discharged to the paper discharge unit 1e. Note that when the paper P is transported along the path R2, that is, when the paper P passes through a position facing the head 10, an image is recorded by the head 10. At this time, in the foreign matter removing unit 42, the foreign matter adhering to the paper P is adsorbed and stored in the foreign matter storage box 44 in the same manner as when the paper P is conveyed from the first paper feeding unit 1d. At this time, as the shaft 80a rotates, the elevating plate 81 and the paper feed roller 80 come into contact with each other, and vibration is generated as described above. Since this vibration is transmitted to the foreign matter storage box 44, the foreign matter shown in FIG. 10 (a) (foreign matter that accumulates from the inclined portion 44b to the sponge 43) is smoothed as shown in FIG. 10 (b). Further, since the separation mechanism 85 is provided, even if a plurality of sheets P accommodated in the opened tray unit 70 are multi-fed, it is possible to send out only the sheet P in contact with the sheet feeding roller 80. Thus, it becomes possible to suppress the double feeding of the paper P.

  In the printer 1 of the present embodiment, a dedicated vibration mode for leveling out foreign matter in the foreign matter storage box 44 can be executed. The control unit 100 drives the transport motor 40M based on a vibration command supplied from an external device by the user, and the gear 46a6 is in the first transmission position and the connecting plate 49 is in the third transmission position as shown in FIG. 9B. The solenoids 47 and 48 are controlled so as to take the transmission position. At this time, the gear 46a6 may be in a separated position. Moreover, although the vibration mode is supposed to be supplied from the external device by the user, it is not limited to this. The vibration mode may not be based on a user operation. For example, the vibration mode may be performed every time a predetermined number of sheets P are conveyed in the printer 1 or may be performed every predetermined period.

  In this way, in the vibration mode, the conveyance motor 40M is driven, the gear 46a6 is in the first transmission position, and the connecting plate 49 is in the third transmission position, so that the rotational force of the conveyance motor 40M is as shown in FIG. As shown in FIG. 4, the gear is transmitted to the gear 46a7, and the shaft 80a rotates clockwise. At this time, since the rotational force of the transport motor 40M is not transmitted to the gear 46a1, the upper roller 23a does not rotate. That is, the sheet P is not conveyed to the roller pair 23 (conveying unit), and the outer peripheral surface of the upper roller 23a is not charged. The disc cam 80b rotates with the rotation of the shaft 80a. For this reason, the elevating plate 81 moves between the contact position and the retracted position, and vibration is generated as described above. When this vibration is generated, the upper roller 23a is not charged, so that no foreign substance in the vicinity of the upper roller 23a and the sponge 43 is generated by the charging. If the upper roller 23a is charged when vibration is generated, even if the vibration is transmitted to the sponge 43, the foreign matter is adsorbed on the outer peripheral surface of the upper roller 23a, and the sponge 43 moves to the foreign matter storage box 44. Foreign matter is difficult to fall. On the other hand, if vibration is transmitted to the sponge while the upper roller 23a is not charged, the foreign matter is not attracted to the outer peripheral surface of the upper roller 23a, so that the foreign matter easily falls from the sponge 43 to the foreign matter storage box 44. When foreign matter accumulates on the sponge 43, the outer peripheral surface of the upper roller 23a may be scraped by the polishing action by the foreign matter. When the outer peripheral surface of the upper roller 23a is scraped, there is a possibility that the foreign matter removal performance by the upper roller 23a may be deteriorated. In the present embodiment, since vibration is transmitted to the sponge 43, foreign matter falls from the sponge 43 to the foreign matter storage box 44. Therefore, wear of the upper roller 23a is prevented, and deterioration of foreign matter removal performance by the upper roller 23a is prevented. it can. Furthermore, the foreign matter in the foreign matter storage box 44 can be made uniform by the vibration transmitted to the foreign matter storage box 44 as shown in FIG. That is, by removing foreign substances that adhere to a relatively large amount of the edges of the paper P in the width direction, etc., it is possible to effectively uniformize the foreign substances that accumulate locally (portions corresponding to the edges of the paper P in the width direction). be able to. As a result, the foreign matter locally accumulates in the foreign matter storage box 44, so that the foreign matter can be prevented from overflowing from the specific part even if the foreign matter storage box 44 has a sufficient capacity. That is, the volume of the foreign matter storage unit 44 can be effectively utilized. At this time, the paper feed roller 80 is not rotated by the one-way clutch 89. That is, the second paper feeding unit 1d (feeding unit) does not feed the paper P, and wear of the separation pad 85a and the paper feeding roller 80 is suppressed.

  As described above, according to the transport device and the printer 1 according to the present embodiment, in the second transport mode in which the paper P is transported from the second paper feed unit 1d, the paper feed roller 80 and the lift plate 81 are driven. Therefore, the paper P can be fed. Further, since the upper roller 23a is rotated, the paper P fed from the second paper feed unit 1d can be transported. Further, at this time, the foreign matter adhering to the upper roller 23 a can be scraped off by the sponge 43. On the other hand, in the vibration mode, the lift plate 81 is moved in a state where the paper P is not fed and a state where the paper P is not transported. In other words, in the vibration mode, the elevating plate 81 is moved in a state where the paper feed roller 80 is not rotated and the upper roller 23a is not rotated. That is, the vibration mode is a mode for moving the lifting plate 81 in a state where the paper P is not fed and transported. The foreign object removal unit 42 can be vibrated by the vibration caused by the movement of the elevating plate 81. As described above, the lifting plate 81 of the second sheet feeding unit 1d is used as a vibration source for vibrating the foreign matter removing unit 42, and the foreign plate removing unit 42 is vibrated by moving the lifting plate 81 in the vibration mode. Therefore, a dedicated vibration source is not necessary, and the cost of the apparatus can be suppressed.

  The transmission mechanism 45b does not transmit the rotational force of the transport motor 40M to the paper feed roller 80 in the vibration mode. For this reason, even if a plurality of sheets P are stored in the opened tray unit 70, the sheets P can be prevented from being conveyed. Thereby, it is possible to prevent the paper P that is not recorded from being conveyed, and to prevent the paper from being damaged. The transmission mechanism 45b does not transmit the rotational force of the transport motor 40M to the upper roller 23a in the vibration mode. For this reason, it is possible to prevent the sheet P from being conveyed by the upper roller 23a (conveying roller) not rotating. Thereby, it is possible to prevent the paper P that is not recorded from being conveyed, and to prevent the paper from being damaged. Further, the foreign matter removing unit 42 has a sponge 43, and the transmission mechanism 45b does not transmit the rotational force of the transport motor 40M to the upper roller 23a in the vibration mode. Thus, in the vibration mode, the upper roller 23a is not rotated, and the outer peripheral surface of the upper roller 23a is not charged. Since vibration is applied to the foreign matter removing portion 42 in a state where the outer peripheral surface of the upper roller 23a is not charged, the foreign matter deposited on the sponge 43 is difficult to be attracted to the outer peripheral surface. Therefore, the foreign matter accumulated on the sponge 43 due to the vibration applied to the sponge 43 easily moves to the foreign matter storage box 44.

  The transmission mechanism 45b includes a changing mechanism 51 including a gear 46a3, a shaft 46b3, a connecting plate 49, and a solenoid 48, and a one-way clutch 89 is provided between the shaft 80a and the paper feed roller 80. Whether or not the paper feed roller 80 is rotated can be realized with a simple configuration. In addition, it is possible to use a common transport motor 40M as a drive source for the upper roller 23a and the paper feed roller 80. Further, since the drive 45 has the disc cam 80b fixed to the shaft 80a, the elevating plate 81 can be moved with a simple configuration in both the transport mode and the foreign material leveling mode.

  In the above-described embodiment, one transport motor 40M is used as a drive source for the upper roller 23a and the paper feed roller 80. However, as shown in FIG. 11, each of the upper roller 23a and the paper feed roller 80 is driven. Two conveyance motors 241M and 242M may be provided. In this modification, in addition to the above-described one-way clutch 89 and disk cam 80b, the drive unit 245 is connected to the two transport motors 241M and 242M, the transmission mechanism 245a connected to the transport motor 241M, and the transport motor 242M. Transmission mechanism 245b. The transmission mechanism 245a includes a plurality of gears meshed with each other and a plurality of shafts that support each of the gears, and transmits the rotational force from the transport motor 241M to the gear 46a1. Thereby, the upper roller 23a rotates by driving the transport motor 241M. The transmission mechanism 245a transmits the rotational force of the transport motor 241M to the drive rollers of the roller pairs 22, 24-28. For this reason, when the upper roller 23a is driven, these roller pairs 22, 24 to 28 are also driven.

  The transmission mechanism 245b also includes a plurality of gears (including the gear 46a7) meshed with each other and a plurality of shafts (including the shaft 80a) that support each of these gears, and transmits the rotational force from the transport motor 242M to the gear 46a7. . Accordingly, the transport motor 242M is driven to rotate in the forward direction, so that the paper feed roller 80 rotates in the direction in which the paper P is transported. At this time, since the disc cam 80b also rotates together with the shaft 80a, the elevating plate 81 moves. Further, since the one-way clutch 89 is disposed between the shaft 80a and the paper feed roller 80, the transport motor 242M is driven to rotate in reverse, so that only the shaft 80a is rotated without rotating the paper feed roller 80. It becomes possible. That is, only the lifting plate 81 can be moved.

  Next, the operation status of the foreign matter removing unit 42 in the transport mode and the vibration mode will be described below. Table 2 shows a paper feed motor 21M, a transport motor 241M, a transport motor 242M, a paper feed roller 21, a paper feed roller 80, an upper roller 23a, and a first transport mode, a second transport mode, and a vibration mode. The state of the lifting plate 81 is shown.

  In the first conveyance mode in which the paper P is conveyed from the first paper supply unit 1c, the control unit 100 drives the paper supply motor 21M and the conveyance motor 241M to rotate the paper supply roller 21 and the roller pairs 22 to 28. In this way, the paper P is sent out by the paper feed roller 21, is conveyed along the paths R1 to R3, and is discharged to the paper discharge unit 1e. At this time, the foreign matter on the paper P is removed by the foreign matter removing unit 42 as in the above-described embodiment.

  In the second transport mode in which the paper P is transported from the second paper feed unit 1d, the control unit 100 drives the transport motors 241M and 242M to rotate the paper feed roller 80 and the roller pairs 22 to 28. At this time, the disc cam 80b also rotates. Therefore, the leading end portion of the paper P stored in the opened tray unit 70 is pressed against the paper feed roller 80 by the elevating plate 81. In this way, the paper P is sent out by the paper feed roller 80, conveyed along the downstream portion of the path R1 and the paths R2 and R3, and discharged to the paper discharge unit 1e. At this time, as in the above-described embodiment, the foreign matter on the paper P is removed by the foreign matter removing unit 42, and the foreign matter in the foreign matter storage box 44 is made as shown in FIG.

  In the vibration mode, the controller 100 drives the transport motor 242M to rotate in the reverse direction to that in the transport mode. At this time, since the transport motor 241M is not driven, the upper roller 23a does not rotate. For this reason, the outer peripheral surface of the upper roller 23a is not charged. The disc cam 80b rotates with the rotation of the shaft 80a. For this reason, the elevating plate 81 moves between the contact position and the retracted position, and vibration is generated as described above. When this vibration occurs, the upper roller 23a is not charged, as in the above-described embodiment, so that no attracting force is generated on the foreign matter in the vicinity of the upper roller 23a and the sponge 43. For this reason, it is possible to effectively drop the foreign matter accumulated on the upper surface of the sponge 43 to the foreign matter storage box 44 side. Further, the foreign matter in the foreign matter storage box 44 can be made uniform so as to be substantially horizontal as shown in FIG. At this time, the paper feed roller 80 is not rotated by the one-way clutch 89. For this reason, wear of the separation pad 85a and the paper feed roller 80 is suppressed.

  In such a modified example, as in the above-described embodiment, in the second transport mode in which the paper P is transported from the second paper feed unit 1d, the paper feed roller 80 and the lift plate 81 are driven. Paper P can be fed. Further, since the upper roller 23a is rotated, the paper P fed from the second paper feed unit 1d can be transported. Further, at this time, the foreign matter adhering to the upper roller 23 a can be scraped off by the sponge 43. On the other hand, in the vibration mode, the lift plate 81 is moved in a state where the paper P is not fed and a state where the paper P is not transported. In other words, in the vibration mode, the elevating plate 81 is moved in a state where the paper feed roller 80 is not rotated and the upper roller 23a is not rotated. That is, the vibration mode is a mode for moving the lifting plate 81 in a state where the paper P is not fed and transported. The foreign object removal unit 42 can be vibrated by the vibration caused by the movement of the elevating plate 81. For this reason, a dedicated vibration source becomes unnecessary, and the increase in cost of the apparatus can be suppressed. Further, whether or not to rotate the upper roller 23a can be realized with a simple configuration. Further, whether or not to rotate the paper feed roller 80 can be realized with a simple configuration.

  In another modification, the control unit 100 may determine whether or not the sheet P is supported on the lifting plate 81 based on a signal output from the sensor 91 when executing the vibration mode. At this time, when the control unit 100 determines that the paper P is supported on the lifting plate 81 (when a signal is output from the sensor 91), the control unit 100 controls the buzzer 95 and allows the user to place the paper P on the tray unit 70. Informs that is contained. On the other hand, when the control unit 100 determines that the sheet P is not supported by the lifting plate 81 (when no signal is output from the sensor 91), the control unit 100 moves the lifting plate 81 while rotating the paper feed roller 80. That is, as in the second transport mode in which the paper P is transported from the second paper feed unit 1d, the control unit 100 controls the transport motor 40M and the solenoids 47 and 48. In this modification, the one-way clutch 89 need not be provided. In addition, the control unit 100 may control the solenoid 48 so that the connecting plate 49 takes the third position. In such another modification, it is possible to prevent the paper P from being fed in the vibration mode.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims. For example, the elevating plate 81 may not reach the contact position from the retracted position or may not reach the separation position from the contact position in the vibration mode. That is, the lifting plate 81 may be moved between the retracted position and the contact position. In the vibration mode, the upper roller 23a may rotate. Further, the solenoids 47 and 48 may not be provided. In this case, by switching the rotation direction of the transport motor 40M according to the transport mode or the vibration mode, the gear 46a6 is moved between the first transmission position and the separation position, and the connecting plate 49 is moved to the second transmission position and the third transmission position. What is necessary is just to comprise the transmission mechanism 45b so that it can move between positions. Further, the user appropriately moves the gear 46a6 between the first transmission position and the separation position and the connecting plate 49 between the second transmission position and the third transmission position according to the conveyance mode or the vibration mode. May be. Instead of the sponge 43, a charging unit that applies a voltage from the power source to the upper roller 23a and charges the outer peripheral surface of the upper roller 23a may be employed. In this case, the control unit 100 controls the charging unit and applies a voltage to the upper roller 23a in the transport mode. On the other hand, the control unit 100 controls the charging unit so as not to apply a voltage to the upper roller 23a in the vibration mode. At this time, the upper roller 23a may be rotating. When such a charging unit is employed, a blade (scraping unit) for scraping off the foreign matter adsorbed by the upper roller 23a is provided.

  Further, the one-way clutch 89 may not be provided. That is, the paper feed roller 80 may rotate in the vibration mode. Further, a disc cam 80b for moving the elevating plate 81 and a paper feed roller 80a may be provided on different axes. In this case, both the paper feed roller 80a and the disc cam 80b are driven in the transport mode, and only the disc cam 80b is driven in the vibration mode. In this way, the lifting plate 81 can be moved without rotating the paper feed roller 80a without employing a one-way clutch.

  When the one-way clutch 89 is included, the drive mechanism 45b may include a gear train that transmits the rotational force of the transport motor 40M to the gear 46a7. In this case, in the vibration mode, the transport motor 40M may be rotated in the reverse direction from that in the transport mode. By doing so, the paper feed roller 80 does not rotate, and the elevating plate 81 can be moved, and the same effect as in the above-described embodiment can be obtained. Further, at this time, the control unit 100 may control the solenoid 48 so that the gear 46a3 is disposed at a position where the gear 46a3 does not mesh with the two gears 46b2 and 46b7. By doing so, the upper roller 23a also does not rotate, so that its outer peripheral surface is not charged, and the same effect as described above can be obtained.

  The present invention can be applied to both a line type and a serial type, and is not limited to a printer, and can also be applied to a facsimile, a copier, and the like. Furthermore, as long as it is a recording apparatus that records an image, it can be applied to any recording apparatus such as a laser type or a thermal type. The recording medium is not limited to the paper P, and may be various recording media.

1 Printer (recording device)
1d Second paper feeding unit (feeding unit)
10 head (recording part)
23a Upper roller (conveyance roller)
42 Foreign matter removal part 43 Sponge (scraping part)
44 Foreign material storage box (foreign material storage)
45,245 Drive unit 45b Transmission mechanism 46a3 Gear (part of changing mechanism)
46b3 shaft (part of the change mechanism)
48 Solenoid (part of changing mechanism)
49 Connecting plate (part of changing mechanism)
70 Tray unit 80 Paper feed roller 80a Shaft 80b Disk cam 81 Lift plate (moving body)
85 Separation mechanism 85a Separation pad (resistance imparting member)
89 One-way clutch 91 Sensor 95 Buzzer (notification unit)
100 Control unit 241M Conveyance motor (first drive source)
242M Conveyance motor (second drive source)
245a Transmission mechanism (first transmission mechanism)
245b Transmission mechanism (second transmission mechanism)

Claims (13)

It is movable between a feeding roller that feeds the recording medium, a first position that supports the recording medium and is separated from the feeding roller, and a second position that is closer to the feeding roller than the first position. A feeding unit including a moving body;
A transport unit including a transport roller that transports the recording medium fed from the feeding unit by rotating in contact with the recording medium;
A foreign matter including a scraping portion that scrapes off foreign matter adhering to the outer peripheral surface of the transport roller by contacting the outer peripheral surface of the transport roller, and a foreign matter storage portion that stores the foreign matter scraped off by the scraping portion. A removal section;
A drive unit that drives the feeding unit and the transport unit;
The drive unit is
When the conveyance mode for conveying the recording medium is executed, the feeding roller is rotated and the movable body is moved from the first position to the second position so that the feeding unit feeds the recording medium. In order to move to a position and transport the recording medium to the transport unit, the transport roller is rotated,
A transport apparatus that moves the moving body when a vibration mode for vibrating the foreign matter removing unit without transporting a recording medium is executed.   2. The drive unit according to claim 1, wherein in the vibration mode, the drive unit is in at least one of a state in which the recording unit does not feed the recording medium and a state in which the recording unit does not transport the recording medium. The transfer device described   The transport device according to claim 2, wherein the driving unit does not rotate the feeding roller in the vibration mode.   It is disposed at a position in contact with the feeding roller, and has a resistance applying member that applies a conveyance resistance in a direction opposite to the feeding direction of the recording medium by the feeding roller, and is fed overlappingly from the moving body. The transport apparatus according to claim 3, further comprising a separation mechanism for separating a plurality of recording media. A sensor that outputs a signal depending on the presence or absence of a recording medium supported by the moving body;
A notification unit;
A control unit for controlling the notification unit,
The control unit determines whether or not a recording medium is supported by the moving body based on a signal output from the sensor, and when the vibration mode is executed, the control unit records the recording medium on the moving body. Is informed that the moving body supports the recording medium, and when it is determined that the recording medium is not supported by the moving body, the feeding is performed. The transport apparatus according to claim 2, wherein the moving body is moved while rotating a feed roller.   The transport device according to claim 2, wherein the driving unit does not rotate the transport roller in the vibration mode.   The transport apparatus according to claim 6, wherein the scraping unit is configured to charge the outer peripheral surface of the rotating transport roller by contacting the outer peripheral surface of the transport roller. The drive unit includes one drive source and a transmission mechanism that transmits a driving force from the drive source to the transport roller,
The transmission mechanism includes a changing mechanism capable of taking a first state in which the driving force is transmitted to the transport roller and a second state in which the driving force is not transmitted to the transport roller;
The transport device according to claim 7, wherein the changing mechanism takes the first state in the transport mode and takes the second state in the vibration mode. The driving unit is disposed between a shaft that supports the feeding roller and rotates by a driving force from the driving source, and the shaft and the feeding roller, and the feeding roller feeds a recording medium. A one-way clutch that transmits only the rotational force in one direction, which is the rotational direction for
The driving unit transmits a rotational force in the one direction to the shaft in the conveyance mode, and transmits a rotational force in a direction opposite to the one direction to the shaft in the vibration mode. The transport apparatus according to claim 8.   The transport device according to claim 9, wherein the driving unit includes a cam that is fixed to the shaft and moves the moving body when the shaft rotates. The drive unit includes a first drive source, a first transmission mechanism that transmits a drive force from the first drive source to the transport roller, a second drive source, and a drive force from the second drive source. A second transmission mechanism for transmitting to the feeding unit;
The drive unit drives the first and second drive sources in the transport mode, and drives the second drive source without driving the first drive source in the vibration mode. Item 8. The transport device according to Item 6 or 7. The drive unit is disposed between a shaft that supports the feeding roller and rotates by a rotational force from the second transmission mechanism, and the shaft and the feeding roller, and the feeding roller serves as a recording medium. A one-way clutch that transmits only the rotational force in one direction, which is the rotational direction for feeding, to the feeding roller;
The second drive source is configured so that the second transmission mechanism transmits the rotational force in one direction to the shaft in the conveyance mode, and the second transmission mechanism transmits the rotational force in the direction to the shaft in the vibration mode. The transport device according to claim 11, wherein the rotational direction is switched so as to transmit a rotational force in the reverse direction. A transport device according to any one of claims 1 to 12,
A recording apparatus comprising: a recording unit configured to record an image on a recording medium.